drivers/net/ethernet/intel/i40e/i40e_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2015 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 /* Local includes */
  28 #include "i40e.h"
  29 #include "i40e_diag.h"
  30 #ifdef CONFIG_I40E_VXLAN
  31 #include <net/vxlan.h>
  32 #endif
  33
  34 const char i40e_driver_name[] = "i40e";
  35 static const char i40e_driver_string[] =
  36                         "Intel(R) Ethernet Connection XL710 Network Driver";
  37
  38 #define DRV_KERN "-k"
  39
  40 #define DRV_VERSION_MAJOR 1
  41 #define DRV_VERSION_MINOR 4
  42 #define DRV_VERSION_BUILD 2
  43 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  44              __stringify(DRV_VERSION_MINOR) "." \
  45              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  46 const char i40e_driver_version_str[] = DRV_VERSION;
  47 static const char i40e_copyright[] = "Copyright (c) 2013 - 2014 Intel Corporation.";
  48
  49 /* a bit of forward declarations */
  50 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  51 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  52 static int i40e_add_vsi(struct i40e_vsi *vsi);
  53 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  54 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  55 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  56 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  57 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  58 static void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
  59                               u16 rss_table_size, u16 rss_size);
  60 static void i40e_fdir_sb_setup(struct i40e_pf *pf);
  61 static int i40e_veb_get_bw_info(struct i40e_veb *veb);
  62
  63 /* i40e_pci_tbl - PCI Device ID Table
  64  *
  65  * Last entry must be all 0s
  66  *
  67  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  68  *   Class, Class Mask, private data (not used) }
  69  */
  70 static const struct pci_device_id i40e_pci_tbl[] = {
  71         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
  72         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
  73         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_A), 0},
  74         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
  75         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
  76         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_A), 0},
  77         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_B), 0},
  78         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_C), 0},
  79         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T), 0},
  80         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T4), 0},
  81         {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2), 0},
  82         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X722), 0},
  83         {PCI_VDEVICE(INTEL, I40E_DEV_ID_1G_BASE_T_X722), 0},
  84         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T_X722), 0},
  85         {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2), 0},
  86         {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2_A), 0},
  87         /* required last entry */
  88         {0, }
  89 };
  90 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  91
  92 #define I40E_MAX_VF_COUNT 128
  93 static int debug = -1;
  94 module_param(debug, int, 0);
  95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  96
  97 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  98 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  99 MODULE_LICENSE("GPL");
 100 MODULE_VERSION(DRV_VERSION);
 101
 102 /**
 103  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
 104  * @hw:   pointer to the HW structure
 105  * @mem:  ptr to mem struct to fill out
 106  * @size: size of memory requested
 107  * @alignment: what to align the allocation to
 108  **/
 109 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
 110                             u64 size, u32 alignment)
 111 {
 112         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 113
 114         mem->size = ALIGN(size, alignment);
 115         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 116                                       &mem->pa, GFP_KERNEL);
 117         if (!mem->va)
 118                 return -ENOMEM;
 119
 120         return 0;
 121 }
 122
 123 /**
 124  * i40e_free_dma_mem_d - OS specific memory free for shared code
 125  * @hw:   pointer to the HW structure
 126  * @mem:  ptr to mem struct to free
 127  **/
 128 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 129 {
 130         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 131
 132         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 133         mem->va = NULL;
 134         mem->pa = 0;
 135         mem->size = 0;
 136
 137         return 0;
 138 }
 139
 140 /**
 141  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 142  * @hw:   pointer to the HW structure
 143  * @mem:  ptr to mem struct to fill out
 144  * @size: size of memory requested
 145  **/
 146 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 147                              u32 size)
 148 {
 149         mem->size = size;
 150         mem->va = kzalloc(size, GFP_KERNEL);
 151
 152         if (!mem->va)
 153                 return -ENOMEM;
 154
 155         return 0;
 156 }
 157
 158 /**
 159  * i40e_free_virt_mem_d - OS specific memory free for shared code
 160  * @hw:   pointer to the HW structure
 161  * @mem:  ptr to mem struct to free
 162  **/
 163 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 164 {
 165         /* it's ok to kfree a NULL pointer */
 166         kfree(mem->va);
 167         mem->va = NULL;
 168         mem->size = 0;
 169
 170         return 0;
 171 }
 172
 173 /**
 174  * i40e_get_lump - find a lump of free generic resource
 175  * @pf: board private structure
 176  * @pile: the pile of resource to search
 177  * @needed: the number of items needed
 178  * @id: an owner id to stick on the items assigned
 179  *
 180  * Returns the base item index of the lump, or negative for error
 181  *
 182  * The search_hint trick and lack of advanced fit-finding only work
 183  * because we're highly likely to have all the same size lump requests.
 184  * Linear search time and any fragmentation should be minimal.
 185  **/
 186 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 187                          u16 needed, u16 id)
 188 {
 189         int ret = -ENOMEM;
 190         int i, j;
 191
 192         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 193                 dev_info(&pf->pdev->dev,
 194                          "param err: pile=%p needed=%d id=0x%04x\n",
 195                          pile, needed, id);
 196                 return -EINVAL;
 197         }
 198
 199         /* start the linear search with an imperfect hint */
 200         i = pile->search_hint;
 201         while (i < pile->num_entries) {
 202                 /* skip already allocated entries */
 203                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 204                         i++;
 205                         continue;
 206                 }
 207
 208                 /* do we have enough in this lump? */
 209                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 210                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 211                                 break;
 212                 }
 213
 214                 if (j == needed) {
 215                         /* there was enough, so assign it to the requestor */
 216                         for (j = 0; j < needed; j++)
 217                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 218                         ret = i;
 219                         pile->search_hint = i + j;
 220                         break;
 221                 }
 222
 223                 /* not enough, so skip over it and continue looking */
 224                 i += j;
 225         }
 226
 227         return ret;
 228 }
 229
 230 /**
 231  * i40e_put_lump - return a lump of generic resource
 232  * @pile: the pile of resource to search
 233  * @index: the base item index
 234  * @id: the owner id of the items assigned
 235  *
 236  * Returns the count of items in the lump
 237  **/
 238 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 239 {
 240         int valid_id = (id | I40E_PILE_VALID_BIT);
 241         int count = 0;
 242         int i;
 243
 244         if (!pile || index >= pile->num_entries)
 245                 return -EINVAL;
 246
 247         for (i = index;
 248              i < pile->num_entries && pile->list[i] == valid_id;
 249              i++) {
 250                 pile->list[i] = 0;
 251                 count++;
 252         }
 253
 254         if (count && index < pile->search_hint)
 255                 pile->search_hint = index;
 256
 257         return count;
 258 }
 259
 260 /**
 261  * i40e_find_vsi_from_id - searches for the vsi with the given id
 262  * @pf - the pf structure to search for the vsi
 263  * @id - id of the vsi it is searching for
 264  **/
 265 struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id)
 266 {
 267         int i;
 268
 269         for (i = 0; i < pf->num_alloc_vsi; i++)
 270                 if (pf->vsi[i] && (pf->vsi[i]->id == id))
 271                         return pf->vsi[i];
 272
 273         return NULL;
 274 }
 275
 276 /**
 277  * i40e_service_event_schedule - Schedule the service task to wake up
 278  * @pf: board private structure
 279  *
 280  * If not already scheduled, this puts the task into the work queue
 281  **/
 282 static void i40e_service_event_schedule(struct i40e_pf *pf)
 283 {
 284         if (!test_bit(__I40E_DOWN, &pf->state) &&
 285             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 286             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 287                 schedule_work(&pf->service_task);
 288 }
 289
 290 /**
 291  * i40e_tx_timeout - Respond to a Tx Hang
 292  * @netdev: network interface device structure
 293  *
 294  * If any port has noticed a Tx timeout, it is likely that the whole
 295  * device is munged, not just the one netdev port, so go for the full
 296  * reset.
 297  **/
 298 #ifdef I40E_FCOE
 299 void i40e_tx_timeout(struct net_device *netdev)
 300 #else
 301 static void i40e_tx_timeout(struct net_device *netdev)
 302 #endif
 303 {
 304         struct i40e_netdev_priv *np = netdev_priv(netdev);
 305         struct i40e_vsi *vsi = np->vsi;
 306         struct i40e_pf *pf = vsi->back;
 307         struct i40e_ring *tx_ring = NULL;
 308         unsigned int i, hung_queue = 0;
 309         u32 head, val;
 310
 311         pf->tx_timeout_count++;
 312
 313         /* find the stopped queue the same way the stack does */
 314         for (i = 0; i < netdev->num_tx_queues; i++) {
 315                 struct netdev_queue *q;
 316                 unsigned long trans_start;
 317
 318                 q = netdev_get_tx_queue(netdev, i);
 319                 trans_start = q->trans_start ? : netdev->trans_start;
 320                 if (netif_xmit_stopped(q) &&
 321                     time_after(jiffies,
 322                                (trans_start + netdev->watchdog_timeo))) {
 323                         hung_queue = i;
 324                         break;
 325                 }
 326         }
 327
 328         if (i == netdev->num_tx_queues) {
 329                 netdev_info(netdev, "tx_timeout: no netdev hung queue found\n");
 330         } else {
 331                 /* now that we have an index, find the tx_ring struct */
 332                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 333                         if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
 334                                 if (hung_queue ==
 335                                     vsi->tx_rings[i]->queue_index) {
 336                                         tx_ring = vsi->tx_rings[i];
 337                                         break;
 338                                 }
 339                         }
 340                 }
 341         }
 342
 343         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 344                 pf->tx_timeout_recovery_level = 1;  /* reset after some time */
 345         else if (time_before(jiffies,
 346                       (pf->tx_timeout_last_recovery + netdev->watchdog_timeo)))
 347                 return;   /* don't do any new action before the next timeout */
 348
 349         if (tx_ring) {
 350                 head = i40e_get_head(tx_ring);
 351                 /* Read interrupt register */
 352                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
 353                         val = rd32(&pf->hw,
 354                              I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
 355                                                 tx_ring->vsi->base_vector - 1));
 356                 else
 357                         val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);
 358
 359                 netdev_info(netdev, "tx_timeout: VSI_seid: %d, Q %d, NTC: 0x%x, HWB: 0x%x, NTU: 0x%x, TAIL: 0x%x, INT: 0x%x\n",
 360                             vsi->seid, hung_queue, tx_ring->next_to_clean,
 361                             head, tx_ring->next_to_use,
 362                             readl(tx_ring->tail), val);
 363         }
 364
 365         pf->tx_timeout_last_recovery = jiffies;
 366         netdev_info(netdev, "tx_timeout recovery level %d, hung_queue %d\n",
 367                     pf->tx_timeout_recovery_level, hung_queue);
 368
 369         switch (pf->tx_timeout_recovery_level) {
 370         case 1:
 371                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 372                 break;
 373         case 2:
 374                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 375                 break;
 376         case 3:
 377                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 378                 break;
 379         default:
 380                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 381                 break;
 382         }
 383
 384         i40e_service_event_schedule(pf);
 385         pf->tx_timeout_recovery_level++;
 386 }
 387
 388 /**
 389  * i40e_release_rx_desc - Store the new tail and head values
 390  * @rx_ring: ring to bump
 391  * @val: new head index
 392  **/
 393 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 394 {
 395         rx_ring->next_to_use = val;
 396
 397         /* Force memory writes to complete before letting h/w
 398          * know there are new descriptors to fetch.  (Only
 399          * applicable for weak-ordered memory model archs,
 400          * such as IA-64).
 401          */
 402         wmb();
 403         writel(val, rx_ring->tail);
 404 }
 405
 406 /**
 407  * i40e_get_vsi_stats_struct - Get System Network Statistics
 408  * @vsi: the VSI we care about
 409  *
 410  * Returns the address of the device statistics structure.
 411  * The statistics are actually updated from the service task.
 412  **/
 413 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 414 {
 415         return &vsi->net_stats;
 416 }
 417
 418 /**
 419  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 420  * @netdev: network interface device structure
 421  *
 422  * Returns the address of the device statistics structure.
 423  * The statistics are actually updated from the service task.
 424  **/
 425 #ifdef I40E_FCOE
 426 struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 427                                              struct net_device *netdev,
 428                                              struct rtnl_link_stats64 *stats)
 429 #else
 430 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 431                                              struct net_device *netdev,
 432                                              struct rtnl_link_stats64 *stats)
 433 #endif
 434 {
 435         struct i40e_netdev_priv *np = netdev_priv(netdev);
 436         struct i40e_ring *tx_ring, *rx_ring;
 437         struct i40e_vsi *vsi = np->vsi;
 438         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 439         int i;
 440
 441         if (test_bit(__I40E_DOWN, &vsi->state))
 442                 return stats;
 443
 444         if (!vsi->tx_rings)
 445                 return stats;
 446
 447         rcu_read_lock();
 448         for (i = 0; i < vsi->num_queue_pairs; i++) {
 449                 u64 bytes, packets;
 450                 unsigned int start;
 451
 452                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 453                 if (!tx_ring)
 454                         continue;
 455
 456                 do {
 457                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
 458                         packets = tx_ring->stats.packets;
 459                         bytes   = tx_ring->stats.bytes;
 460                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
 461
 462                 stats->tx_packets += packets;
 463                 stats->tx_bytes   += bytes;
 464                 rx_ring = &tx_ring[1];
 465
 466                 do {
 467                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
 468                         packets = rx_ring->stats.packets;
 469                         bytes   = rx_ring->stats.bytes;
 470                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
 471
 472                 stats->rx_packets += packets;
 473                 stats->rx_bytes   += bytes;
 474         }
 475         rcu_read_unlock();
 476
 477         /* following stats updated by i40e_watchdog_subtask() */
 478         stats->multicast        = vsi_stats->multicast;
 479         stats->tx_errors        = vsi_stats->tx_errors;
 480         stats->tx_dropped       = vsi_stats->tx_dropped;
 481         stats->rx_errors        = vsi_stats->rx_errors;
 482         stats->rx_dropped       = vsi_stats->rx_dropped;
 483         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 484         stats->rx_length_errors = vsi_stats->rx_length_errors;
 485
 486         return stats;
 487 }
 488
 489 /**
 490  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 491  * @vsi: the VSI to have its stats reset
 492  **/
 493 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 494 {
 495         struct rtnl_link_stats64 *ns;
 496         int i;
 497
 498         if (!vsi)
 499                 return;
 500
 501         ns = i40e_get_vsi_stats_struct(vsi);
 502         memset(ns, 0, sizeof(*ns));
 503         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 504         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 505         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 506         if (vsi->rx_rings && vsi->rx_rings[0]) {
 507                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 508                         memset(&vsi->rx_rings[i]->stats, 0,
 509                                sizeof(vsi->rx_rings[i]->stats));
 510                         memset(&vsi->rx_rings[i]->rx_stats, 0,
 511                                sizeof(vsi->rx_rings[i]->rx_stats));
 512                         memset(&vsi->tx_rings[i]->stats, 0,
 513                                sizeof(vsi->tx_rings[i]->stats));
 514                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 515                                sizeof(vsi->tx_rings[i]->tx_stats));
 516                 }
 517         }
 518         vsi->stat_offsets_loaded = false;
 519 }
 520
 521 /**
 522  * i40e_pf_reset_stats - Reset all of the stats for the given PF
 523  * @pf: the PF to be reset
 524  **/
 525 void i40e_pf_reset_stats(struct i40e_pf *pf)
 526 {
 527         int i;
 528
 529         memset(&pf->stats, 0, sizeof(pf->stats));
 530         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 531         pf->stat_offsets_loaded = false;
 532
 533         for (i = 0; i < I40E_MAX_VEB; i++) {
 534                 if (pf->veb[i]) {
 535                         memset(&pf->veb[i]->stats, 0,
 536                                sizeof(pf->veb[i]->stats));
 537                         memset(&pf->veb[i]->stats_offsets, 0,
 538                                sizeof(pf->veb[i]->stats_offsets));
 539                         pf->veb[i]->stat_offsets_loaded = false;
 540                 }
 541         }
 542 }
 543
 544 /**
 545  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 546  * @hw: ptr to the hardware info
 547  * @hireg: the high 32 bit reg to read
 548  * @loreg: the low 32 bit reg to read
 549  * @offset_loaded: has the initial offset been loaded yet
 550  * @offset: ptr to current offset value
 551  * @stat: ptr to the stat
 552  *
 553  * Since the device stats are not reset at PFReset, they likely will not
 554  * be zeroed when the driver starts.  We'll save the first values read
 555  * and use them as offsets to be subtracted from the raw values in order
 556  * to report stats that count from zero.  In the process, we also manage
 557  * the potential roll-over.
 558  **/
 559 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 560                                bool offset_loaded, u64 *offset, u64 *stat)
 561 {
 562         u64 new_data;
 563
 564         if (hw->device_id == I40E_DEV_ID_QEMU) {
 565                 new_data = rd32(hw, loreg);
 566                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 567         } else {
 568                 new_data = rd64(hw, loreg);
 569         }
 570         if (!offset_loaded)
 571                 *offset = new_data;
 572         if (likely(new_data >= *offset))
 573                 *stat = new_data - *offset;
 574         else
 575                 *stat = (new_data + BIT_ULL(48)) - *offset;
 576         *stat &= 0xFFFFFFFFFFFFULL;
 577 }
 578
 579 /**
 580  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 581  * @hw: ptr to the hardware info
 582  * @reg: the hw reg to read
 583  * @offset_loaded: has the initial offset been loaded yet
 584  * @offset: ptr to current offset value
 585  * @stat: ptr to the stat
 586  **/
 587 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 588                                bool offset_loaded, u64 *offset, u64 *stat)
 589 {
 590         u32 new_data;
 591
 592         new_data = rd32(hw, reg);
 593         if (!offset_loaded)
 594                 *offset = new_data;
 595         if (likely(new_data >= *offset))
 596                 *stat = (u32)(new_data - *offset);
 597         else
 598                 *stat = (u32)((new_data + BIT_ULL(32)) - *offset);
 599 }
 600
 601 /**
 602  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 603  * @vsi: the VSI to be updated
 604  **/
 605 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 606 {
 607         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 608         struct i40e_pf *pf = vsi->back;
 609         struct i40e_hw *hw = &pf->hw;
 610         struct i40e_eth_stats *oes;
 611         struct i40e_eth_stats *es;     /* device's eth stats */
 612
 613         es = &vsi->eth_stats;
 614         oes = &vsi->eth_stats_offsets;
 615
 616         /* Gather up the stats that the hw collects */
 617         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 618                            vsi->stat_offsets_loaded,
 619                            &oes->tx_errors, &es->tx_errors);
 620         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 621                            vsi->stat_offsets_loaded,
 622                            &oes->rx_discards, &es->rx_discards);
 623         i40e_stat_update32(hw, I40E_GLV_RUPP(stat_idx),
 624                            vsi->stat_offsets_loaded,
 625                            &oes->rx_unknown_protocol, &es->rx_unknown_protocol);
 626         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 627                            vsi->stat_offsets_loaded,
 628                            &oes->tx_errors, &es->tx_errors);
 629
 630         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 631                            I40E_GLV_GORCL(stat_idx),
 632                            vsi->stat_offsets_loaded,
 633                            &oes->rx_bytes, &es->rx_bytes);
 634         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 635                            I40E_GLV_UPRCL(stat_idx),
 636                            vsi->stat_offsets_loaded,
 637                            &oes->rx_unicast, &es->rx_unicast);
 638         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 639                            I40E_GLV_MPRCL(stat_idx),
 640                            vsi->stat_offsets_loaded,
 641                            &oes->rx_multicast, &es->rx_multicast);
 642         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 643                            I40E_GLV_BPRCL(stat_idx),
 644                            vsi->stat_offsets_loaded,
 645                            &oes->rx_broadcast, &es->rx_broadcast);
 646
 647         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 648                            I40E_GLV_GOTCL(stat_idx),
 649                            vsi->stat_offsets_loaded,
 650                            &oes->tx_bytes, &es->tx_bytes);
 651         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 652                            I40E_GLV_UPTCL(stat_idx),
 653                            vsi->stat_offsets_loaded,
 654                            &oes->tx_unicast, &es->tx_unicast);
 655         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 656                            I40E_GLV_MPTCL(stat_idx),
 657                            vsi->stat_offsets_loaded,
 658                            &oes->tx_multicast, &es->tx_multicast);
 659         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 660                            I40E_GLV_BPTCL(stat_idx),
 661                            vsi->stat_offsets_loaded,
 662                            &oes->tx_broadcast, &es->tx_broadcast);
 663         vsi->stat_offsets_loaded = true;
 664 }
 665
 666 /**
 667  * i40e_update_veb_stats - Update Switch component statistics
 668  * @veb: the VEB being updated
 669  **/
 670 static void i40e_update_veb_stats(struct i40e_veb *veb)
 671 {
 672         struct i40e_pf *pf = veb->pf;
 673         struct i40e_hw *hw = &pf->hw;
 674         struct i40e_eth_stats *oes;
 675         struct i40e_eth_stats *es;     /* device's eth stats */
 676         struct i40e_veb_tc_stats *veb_oes;
 677         struct i40e_veb_tc_stats *veb_es;
 678         int i, idx = 0;
 679
 680         idx = veb->stats_idx;
 681         es = &veb->stats;
 682         oes = &veb->stats_offsets;
 683         veb_es = &veb->tc_stats;
 684         veb_oes = &veb->tc_stats_offsets;
 685
 686         /* Gather up the stats that the hw collects */
 687         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 688                            veb->stat_offsets_loaded,
 689                            &oes->tx_discards, &es->tx_discards);
 690         if (hw->revision_id > 0)
 691                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 692                                    veb->stat_offsets_loaded,
 693                                    &oes->rx_unknown_protocol,
 694                                    &es->rx_unknown_protocol);
 695         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 696                            veb->stat_offsets_loaded,
 697                            &oes->rx_bytes, &es->rx_bytes);
 698         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 699                            veb->stat_offsets_loaded,
 700                            &oes->rx_unicast, &es->rx_unicast);
 701         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 702                            veb->stat_offsets_loaded,
 703                            &oes->rx_multicast, &es->rx_multicast);
 704         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 705                            veb->stat_offsets_loaded,
 706                            &oes->rx_broadcast, &es->rx_broadcast);
 707
 708         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 709                            veb->stat_offsets_loaded,
 710                            &oes->tx_bytes, &es->tx_bytes);
 711         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 712                            veb->stat_offsets_loaded,
 713                            &oes->tx_unicast, &es->tx_unicast);
 714         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 715                            veb->stat_offsets_loaded,
 716                            &oes->tx_multicast, &es->tx_multicast);
 717         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 718                            veb->stat_offsets_loaded,
 719                            &oes->tx_broadcast, &es->tx_broadcast);
 720         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
 721                 i40e_stat_update48(hw, I40E_GLVEBTC_RPCH(i, idx),
 722                                    I40E_GLVEBTC_RPCL(i, idx),
 723                                    veb->stat_offsets_loaded,
 724                                    &veb_oes->tc_rx_packets[i],
 725                                    &veb_es->tc_rx_packets[i]);
 726                 i40e_stat_update48(hw, I40E_GLVEBTC_RBCH(i, idx),
 727                                    I40E_GLVEBTC_RBCL(i, idx),
 728                                    veb->stat_offsets_loaded,
 729                                    &veb_oes->tc_rx_bytes[i],
 730                                    &veb_es->tc_rx_bytes[i]);
 731                 i40e_stat_update48(hw, I40E_GLVEBTC_TPCH(i, idx),
 732                                    I40E_GLVEBTC_TPCL(i, idx),
 733                                    veb->stat_offsets_loaded,
 734                                    &veb_oes->tc_tx_packets[i],
 735                                    &veb_es->tc_tx_packets[i]);
 736                 i40e_stat_update48(hw, I40E_GLVEBTC_TBCH(i, idx),
 737                                    I40E_GLVEBTC_TBCL(i, idx),
 738                                    veb->stat_offsets_loaded,
 739                                    &veb_oes->tc_tx_bytes[i],
 740                                    &veb_es->tc_tx_bytes[i]);
 741         }
 742         veb->stat_offsets_loaded = true;
 743 }
 744
 745 #ifdef I40E_FCOE
 746 /**
 747  * i40e_update_fcoe_stats - Update FCoE-specific ethernet statistics counters.
 748  * @vsi: the VSI that is capable of doing FCoE
 749  **/
 750 static void i40e_update_fcoe_stats(struct i40e_vsi *vsi)
 751 {
 752         struct i40e_pf *pf = vsi->back;
 753         struct i40e_hw *hw = &pf->hw;
 754         struct i40e_fcoe_stats *ofs;
 755         struct i40e_fcoe_stats *fs;     /* device's eth stats */
 756         int idx;
 757
 758         if (vsi->type != I40E_VSI_FCOE)
 759                 return;
 760
 761         idx = (pf->pf_seid - I40E_BASE_PF_SEID) + I40E_FCOE_PF_STAT_OFFSET;
 762         fs = &vsi->fcoe_stats;
 763         ofs = &vsi->fcoe_stats_offsets;
 764
 765         i40e_stat_update32(hw, I40E_GL_FCOEPRC(idx),
 766                            vsi->fcoe_stat_offsets_loaded,
 767                            &ofs->rx_fcoe_packets, &fs->rx_fcoe_packets);
 768         i40e_stat_update48(hw, I40E_GL_FCOEDWRCH(idx), I40E_GL_FCOEDWRCL(idx),
 769                            vsi->fcoe_stat_offsets_loaded,
 770                            &ofs->rx_fcoe_dwords, &fs->rx_fcoe_dwords);
 771         i40e_stat_update32(hw, I40E_GL_FCOERPDC(idx),
 772                            vsi->fcoe_stat_offsets_loaded,
 773                            &ofs->rx_fcoe_dropped, &fs->rx_fcoe_dropped);
 774         i40e_stat_update32(hw, I40E_GL_FCOEPTC(idx),
 775                            vsi->fcoe_stat_offsets_loaded,
 776                            &ofs->tx_fcoe_packets, &fs->tx_fcoe_packets);
 777         i40e_stat_update48(hw, I40E_GL_FCOEDWTCH(idx), I40E_GL_FCOEDWTCL(idx),
 778                            vsi->fcoe_stat_offsets_loaded,
 779                            &ofs->tx_fcoe_dwords, &fs->tx_fcoe_dwords);
 780         i40e_stat_update32(hw, I40E_GL_FCOECRC(idx),
 781                            vsi->fcoe_stat_offsets_loaded,
 782                            &ofs->fcoe_bad_fccrc, &fs->fcoe_bad_fccrc);
 783         i40e_stat_update32(hw, I40E_GL_FCOELAST(idx),
 784                            vsi->fcoe_stat_offsets_loaded,
 785                            &ofs->fcoe_last_error, &fs->fcoe_last_error);
 786         i40e_stat_update32(hw, I40E_GL_FCOEDDPC(idx),
 787                            vsi->fcoe_stat_offsets_loaded,
 788                            &ofs->fcoe_ddp_count, &fs->fcoe_ddp_count);
 789
 790         vsi->fcoe_stat_offsets_loaded = true;
 791 }
 792
 793 #endif
 794 /**
 795  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 796  * @pf: the corresponding PF
 797  *
 798  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 799  **/
 800 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 801 {
 802         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 803         struct i40e_hw_port_stats *nsd = &pf->stats;
 804         struct i40e_hw *hw = &pf->hw;
 805         u64 xoff = 0;
 806
 807         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 808             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 809                 return;
 810
 811         xoff = nsd->link_xoff_rx;
 812         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 813                            pf->stat_offsets_loaded,
 814                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 815
 816         /* No new LFC xoff rx */
 817         if (!(nsd->link_xoff_rx - xoff))
 818                 return;
 819
 820 }
 821
 822 /**
 823  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 824  * @pf: the corresponding PF
 825  *
 826  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 827  **/
 828 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 829 {
 830         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 831         struct i40e_hw_port_stats *nsd = &pf->stats;
 832         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 833         struct i40e_dcbx_config *dcb_cfg;
 834         struct i40e_hw *hw = &pf->hw;
 835         u16 i;
 836         u8 tc;
 837
 838         dcb_cfg = &hw->local_dcbx_config;
 839
 840         /* Collect Link XOFF stats when PFC is disabled */
 841         if (!dcb_cfg->pfc.pfcenable) {
 842                 i40e_update_link_xoff_rx(pf);
 843                 return;
 844         }
 845
 846         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 847                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 848
 849                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 850                                    pf->stat_offsets_loaded,
 851                                    &osd->priority_xoff_rx[i],
 852                                    &nsd->priority_xoff_rx[i]);
 853
 854                 /* No new PFC xoff rx */
 855                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 856                         continue;
 857                 /* Get the TC for given priority */
 858                 tc = dcb_cfg->etscfg.prioritytable[i];
 859                 xoff[tc] = true;
 860         }
 861 }
 862
 863 /**
 864  * i40e_update_vsi_stats - Update the vsi statistics counters.
 865  * @vsi: the VSI to be updated
 866  *
 867  * There are a few instances where we store the same stat in a
 868  * couple of different structs.  This is partly because we have
 869  * the netdev stats that need to be filled out, which is slightly
 870  * different from the "eth_stats" defined by the chip and used in
 871  * VF communications.  We sort it out here.
 872  **/
 873 static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 874 {
 875         struct i40e_pf *pf = vsi->back;
 876         struct rtnl_link_stats64 *ons;
 877         struct rtnl_link_stats64 *ns;   /* netdev stats */
 878         struct i40e_eth_stats *oes;
 879         struct i40e_eth_stats *es;     /* device's eth stats */
 880         u32 tx_restart, tx_busy;
 881         struct i40e_ring *p;
 882         u32 rx_page, rx_buf;
 883         u64 bytes, packets;
 884         unsigned int start;
 885         u64 tx_linearize;
 886         u64 tx_force_wb;
 887         u64 rx_p, rx_b;
 888         u64 tx_p, tx_b;
 889         u16 q;
 890
 891         if (test_bit(__I40E_DOWN, &vsi->state) ||
 892             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 893                 return;
 894
 895         ns = i40e_get_vsi_stats_struct(vsi);
 896         ons = &vsi->net_stats_offsets;
 897         es = &vsi->eth_stats;
 898         oes = &vsi->eth_stats_offsets;
 899
 900         /* Gather up the netdev and vsi stats that the driver collects
 901          * on the fly during packet processing
 902          */
 903         rx_b = rx_p = 0;
 904         tx_b = tx_p = 0;
 905         tx_restart = tx_busy = tx_linearize = tx_force_wb = 0;
 906         rx_page = 0;
 907         rx_buf = 0;
 908         rcu_read_lock();
 909         for (q = 0; q < vsi->num_queue_pairs; q++) {
 910                 /* locate Tx ring */
 911                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 912
 913                 do {
 914                         start = u64_stats_fetch_begin_irq(&p->syncp);
 915                         packets = p->stats.packets;
 916                         bytes = p->stats.bytes;
 917                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 918                 tx_b += bytes;
 919                 tx_p += packets;
 920                 tx_restart += p->tx_stats.restart_queue;
 921                 tx_busy += p->tx_stats.tx_busy;
 922                 tx_linearize += p->tx_stats.tx_linearize;
 923                 tx_force_wb += p->tx_stats.tx_force_wb;
 924
 925                 /* Rx queue is part of the same block as Tx queue */
 926                 p = &p[1];
 927                 do {
 928                         start = u64_stats_fetch_begin_irq(&p->syncp);
 929                         packets = p->stats.packets;
 930                         bytes = p->stats.bytes;
 931                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 932                 rx_b += bytes;
 933                 rx_p += packets;
 934                 rx_buf += p->rx_stats.alloc_buff_failed;
 935                 rx_page += p->rx_stats.alloc_page_failed;
 936         }
 937         rcu_read_unlock();
 938         vsi->tx_restart = tx_restart;
 939         vsi->tx_busy = tx_busy;
 940         vsi->tx_linearize = tx_linearize;
 941         vsi->tx_force_wb = tx_force_wb;
 942         vsi->rx_page_failed = rx_page;
 943         vsi->rx_buf_failed = rx_buf;
 944
 945         ns->rx_packets = rx_p;
 946         ns->rx_bytes = rx_b;
 947         ns->tx_packets = tx_p;
 948         ns->tx_bytes = tx_b;
 949
 950         /* update netdev stats from eth stats */
 951         i40e_update_eth_stats(vsi);
 952         ons->tx_errors = oes->tx_errors;
 953         ns->tx_errors = es->tx_errors;
 954         ons->multicast = oes->rx_multicast;
 955         ns->multicast = es->rx_multicast;
 956         ons->rx_dropped = oes->rx_discards;
 957         ns->rx_dropped = es->rx_discards;
 958         ons->tx_dropped = oes->tx_discards;
 959         ns->tx_dropped = es->tx_discards;
 960
 961         /* pull in a couple PF stats if this is the main vsi */
 962         if (vsi == pf->vsi[pf->lan_vsi]) {
 963                 ns->rx_crc_errors = pf->stats.crc_errors;
 964                 ns->rx_errors = pf->stats.crc_errors + pf->stats.illegal_bytes;
 965                 ns->rx_length_errors = pf->stats.rx_length_errors;
 966         }
 967 }
 968
 969 /**
 970  * i40e_update_pf_stats - Update the PF statistics counters.
 971  * @pf: the PF to be updated
 972  **/
 973 static void i40e_update_pf_stats(struct i40e_pf *pf)
 974 {
 975         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 976         struct i40e_hw_port_stats *nsd = &pf->stats;
 977         struct i40e_hw *hw = &pf->hw;
 978         u32 val;
 979         int i;
 980
 981         i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 982                            I40E_GLPRT_GORCL(hw->port),
 983                            pf->stat_offsets_loaded,
 984                            &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 985         i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 986                            I40E_GLPRT_GOTCL(hw->port),
 987                            pf->stat_offsets_loaded,
 988                            &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 989         i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 990                            pf->stat_offsets_loaded,
 991                            &osd->eth.rx_discards,
 992                            &nsd->eth.rx_discards);
 993         i40e_stat_update48(hw, I40E_GLPRT_UPRCH(hw->port),
 994                            I40E_GLPRT_UPRCL(hw->port),
 995                            pf->stat_offsets_loaded,
 996                            &osd->eth.rx_unicast,
 997                            &nsd->eth.rx_unicast);
 998         i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 999                            I40E_GLPRT_MPRCL(hw->port),
1000                            pf->stat_offsets_loaded,
1001                            &osd->eth.rx_multicast,
1002                            &nsd->eth.rx_multicast);
1003         i40e_stat_update48(hw, I40E_GLPRT_BPRCH(hw->port),
1004                            I40E_GLPRT_BPRCL(hw->port),
1005                            pf->stat_offsets_loaded,
1006                            &osd->eth.rx_broadcast,
1007                            &nsd->eth.rx_broadcast);
1008         i40e_stat_update48(hw, I40E_GLPRT_UPTCH(hw->port),
1009                            I40E_GLPRT_UPTCL(hw->port),
1010                            pf->stat_offsets_loaded,
1011                            &osd->eth.tx_unicast,
1012                            &nsd->eth.tx_unicast);
1013         i40e_stat_update48(hw, I40E_GLPRT_MPTCH(hw->port),
1014                            I40E_GLPRT_MPTCL(hw->port),
1015                            pf->stat_offsets_loaded,
1016                            &osd->eth.tx_multicast,
1017                            &nsd->eth.tx_multicast);
1018         i40e_stat_update48(hw, I40E_GLPRT_BPTCH(hw->port),
1019                            I40E_GLPRT_BPTCL(hw->port),
1020                            pf->stat_offsets_loaded,
1021                            &osd->eth.tx_broadcast,
1022                            &nsd->eth.tx_broadcast);
1023
1024         i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
1025                            pf->stat_offsets_loaded,
1026                            &osd->tx_dropped_link_down,
1027                            &nsd->tx_dropped_link_down);
1028
1029         i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
1030                            pf->stat_offsets_loaded,
1031                            &osd->crc_errors, &nsd->crc_errors);
1032
1033         i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
1034                            pf->stat_offsets_loaded,
1035                            &osd->illegal_bytes, &nsd->illegal_bytes);
1036
1037         i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
1038                            pf->stat_offsets_loaded,
1039                            &osd->mac_local_faults,
1040                            &nsd->mac_local_faults);
1041         i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
1042                            pf->stat_offsets_loaded,
1043                            &osd->mac_remote_faults,
1044                            &nsd->mac_remote_faults);
1045
1046         i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
1047                            pf->stat_offsets_loaded,
1048                            &osd->rx_length_errors,
1049                            &nsd->rx_length_errors);
1050
1051         i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
1052                            pf->stat_offsets_loaded,
1053                            &osd->link_xon_rx, &nsd->link_xon_rx);
1054         i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
1055                            pf->stat_offsets_loaded,
1056                            &osd->link_xon_tx, &nsd->link_xon_tx);
1057         i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
1058         i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
1059                            pf->stat_offsets_loaded,
1060                            &osd->link_xoff_tx, &nsd->link_xoff_tx);
1061
1062         for (i = 0; i < 8; i++) {
1063                 i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
1064                                    pf->stat_offsets_loaded,
1065                                    &osd->priority_xon_rx[i],
1066                                    &nsd->priority_xon_rx[i]);
1067                 i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
1068                                    pf->stat_offsets_loaded,
1069                                    &osd->priority_xon_tx[i],
1070                                    &nsd->priority_xon_tx[i]);
1071                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
1072                                    pf->stat_offsets_loaded,
1073                                    &osd->priority_xoff_tx[i],
1074                                    &nsd->priority_xoff_tx[i]);
1075                 i40e_stat_update32(hw,
1076                                    I40E_GLPRT_RXON2OFFCNT(hw->port, i),
1077                                    pf->stat_offsets_loaded,
1078                                    &osd->priority_xon_2_xoff[i],
1079                                    &nsd->priority_xon_2_xoff[i]);
1080         }
1081
1082         i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
1083                            I40E_GLPRT_PRC64L(hw->port),
1084                            pf->stat_offsets_loaded,
1085                            &osd->rx_size_64, &nsd->rx_size_64);
1086         i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
1087                            I40E_GLPRT_PRC127L(hw->port),
1088                            pf->stat_offsets_loaded,
1089                            &osd->rx_size_127, &nsd->rx_size_127);
1090         i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
1091                            I40E_GLPRT_PRC255L(hw->port),
1092                            pf->stat_offsets_loaded,
1093                            &osd->rx_size_255, &nsd->rx_size_255);
1094         i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
1095                            I40E_GLPRT_PRC511L(hw->port),
1096                            pf->stat_offsets_loaded,
1097                            &osd->rx_size_511, &nsd->rx_size_511);
1098         i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
1099                            I40E_GLPRT_PRC1023L(hw->port),
1100                            pf->stat_offsets_loaded,
1101                            &osd->rx_size_1023, &nsd->rx_size_1023);
1102         i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
1103                            I40E_GLPRT_PRC1522L(hw->port),
1104                            pf->stat_offsets_loaded,
1105                            &osd->rx_size_1522, &nsd->rx_size_1522);
1106         i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
1107                            I40E_GLPRT_PRC9522L(hw->port),
1108                            pf->stat_offsets_loaded,
1109                            &osd->rx_size_big, &nsd->rx_size_big);
1110
1111         i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
1112                            I40E_GLPRT_PTC64L(hw->port),
1113                            pf->stat_offsets_loaded,
1114                            &osd->tx_size_64, &nsd->tx_size_64);
1115         i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
1116                            I40E_GLPRT_PTC127L(hw->port),
1117                            pf->stat_offsets_loaded,
1118                            &osd->tx_size_127, &nsd->tx_size_127);
1119         i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
1120                            I40E_GLPRT_PTC255L(hw->port),
1121                            pf->stat_offsets_loaded,
1122                            &osd->tx_size_255, &nsd->tx_size_255);
1123         i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
1124                            I40E_GLPRT_PTC511L(hw->port),
1125                            pf->stat_offsets_loaded,
1126                            &osd->tx_size_511, &nsd->tx_size_511);
1127         i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
1128                            I40E_GLPRT_PTC1023L(hw->port),
1129                            pf->stat_offsets_loaded,
1130                            &osd->tx_size_1023, &nsd->tx_size_1023);
1131         i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
1132                            I40E_GLPRT_PTC1522L(hw->port),
1133                            pf->stat_offsets_loaded,
1134                            &osd->tx_size_1522, &nsd->tx_size_1522);
1135         i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
1136                            I40E_GLPRT_PTC9522L(hw->port),
1137                            pf->stat_offsets_loaded,
1138                            &osd->tx_size_big, &nsd->tx_size_big);
1139
1140         i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
1141                            pf->stat_offsets_loaded,
1142                            &osd->rx_undersize, &nsd->rx_undersize);
1143         i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
1144                            pf->stat_offsets_loaded,
1145                            &osd->rx_fragments, &nsd->rx_fragments);
1146         i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
1147                            pf->stat_offsets_loaded,
1148                            &osd->rx_oversize, &nsd->rx_oversize);
1149         i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
1150                            pf->stat_offsets_loaded,
1151                            &osd->rx_jabber, &nsd->rx_jabber);
1152
1153         /* FDIR stats */
1154         i40e_stat_update32(hw,
1155                            I40E_GLQF_PCNT(I40E_FD_ATR_STAT_IDX(pf->hw.pf_id)),
1156                            pf->stat_offsets_loaded,
1157                            &osd->fd_atr_match, &nsd->fd_atr_match);
1158         i40e_stat_update32(hw,
1159                            I40E_GLQF_PCNT(I40E_FD_SB_STAT_IDX(pf->hw.pf_id)),
1160                            pf->stat_offsets_loaded,
1161                            &osd->fd_sb_match, &nsd->fd_sb_match);
1162         i40e_stat_update32(hw,
1163                       I40E_GLQF_PCNT(I40E_FD_ATR_TUNNEL_STAT_IDX(pf->hw.pf_id)),
1164                       pf->stat_offsets_loaded,
1165                       &osd->fd_atr_tunnel_match, &nsd->fd_atr_tunnel_match);
1166
1167         val = rd32(hw, I40E_PRTPM_EEE_STAT);
1168         nsd->tx_lpi_status =
1169                        (val & I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_MASK) >>
1170                         I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_SHIFT;
1171         nsd->rx_lpi_status =
1172                        (val & I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_MASK) >>
1173                         I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_SHIFT;
1174         i40e_stat_update32(hw, I40E_PRTPM_TLPIC,
1175                            pf->stat_offsets_loaded,
1176                            &osd->tx_lpi_count, &nsd->tx_lpi_count);
1177         i40e_stat_update32(hw, I40E_PRTPM_RLPIC,
1178                            pf->stat_offsets_loaded,
1179                            &osd->rx_lpi_count, &nsd->rx_lpi_count);
1180
1181         if (pf->flags & I40E_FLAG_FD_SB_ENABLED &&
1182             !(pf->auto_disable_flags & I40E_FLAG_FD_SB_ENABLED))
1183                 nsd->fd_sb_status = true;
1184         else
1185                 nsd->fd_sb_status = false;
1186
1187         if (pf->flags & I40E_FLAG_FD_ATR_ENABLED &&
1188             !(pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED))
1189                 nsd->fd_atr_status = true;
1190         else
1191                 nsd->fd_atr_status = false;
1192
1193         pf->stat_offsets_loaded = true;
1194 }
1195
1196 /**
1197  * i40e_update_stats - Update the various statistics counters.
1198  * @vsi: the VSI to be updated
1199  *
1200  * Update the various stats for this VSI and its related entities.
1201  **/
1202 void i40e_update_stats(struct i40e_vsi *vsi)
1203 {
1204         struct i40e_pf *pf = vsi->back;
1205
1206         if (vsi == pf->vsi[pf->lan_vsi])
1207                 i40e_update_pf_stats(pf);
1208
1209         i40e_update_vsi_stats(vsi);
1210 #ifdef I40E_FCOE
1211         i40e_update_fcoe_stats(vsi);
1212 #endif
1213 }
1214
1215 /**
1216  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
1217  * @vsi: the VSI to be searched
1218  * @macaddr: the MAC address
1219  * @vlan: the vlan
1220  * @is_vf: make sure its a VF filter, else doesn't matter
1221  * @is_netdev: make sure its a netdev filter, else doesn't matter
1222  *
1223  * Returns ptr to the filter object or NULL
1224  **/
1225 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
1226                                                 u8 *macaddr, s16 vlan,
1227                                                 bool is_vf, bool is_netdev)
1228 {
1229         struct i40e_mac_filter *f;
1230
1231         if (!vsi || !macaddr)
1232                 return NULL;
1233
1234         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1235                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1236                     (vlan == f->vlan)    &&
1237                     (!is_vf || f->is_vf) &&
1238                     (!is_netdev || f->is_netdev))
1239                         return f;
1240         }
1241         return NULL;
1242 }
1243
1244 /**
1245  * i40e_find_mac - Find a mac addr in the macvlan filters list
1246  * @vsi: the VSI to be searched
1247  * @macaddr: the MAC address we are searching for
1248  * @is_vf: make sure its a VF filter, else doesn't matter
1249  * @is_netdev: make sure its a netdev filter, else doesn't matter
1250  *
1251  * Returns the first filter with the provided MAC address or NULL if
1252  * MAC address was not found
1253  **/
1254 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1255                                       bool is_vf, bool is_netdev)
1256 {
1257         struct i40e_mac_filter *f;
1258
1259         if (!vsi || !macaddr)
1260                 return NULL;
1261
1262         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1263                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1264                     (!is_vf || f->is_vf) &&
1265                     (!is_netdev || f->is_netdev))
1266                         return f;
1267         }
1268         return NULL;
1269 }
1270
1271 /**
1272  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1273  * @vsi: the VSI to be searched
1274  *
1275  * Returns true if VSI is in vlan mode or false otherwise
1276  **/
1277 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1278 {
1279         struct i40e_mac_filter *f;
1280
1281         /* Only -1 for all the filters denotes not in vlan mode
1282          * so we have to go through all the list in order to make sure
1283          */
1284         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1285                 if (f->vlan >= 0 || vsi->info.pvid)
1286                         return true;
1287         }
1288
1289         return false;
1290 }
1291
1292 /**
1293  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1294  * @vsi: the VSI to be searched
1295  * @macaddr: the mac address to be filtered
1296  * @is_vf: true if it is a VF
1297  * @is_netdev: true if it is a netdev
1298  *
1299  * Goes through all the macvlan filters and adds a
1300  * macvlan filter for each unique vlan that already exists
1301  *
1302  * Returns first filter found on success, else NULL
1303  **/
1304 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1305                                              bool is_vf, bool is_netdev)
1306 {
1307         struct i40e_mac_filter *f;
1308
1309         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1310                 if (vsi->info.pvid)
1311                         f->vlan = le16_to_cpu(vsi->info.pvid);
1312                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1313                                       is_vf, is_netdev)) {
1314                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1315                                              is_vf, is_netdev))
1316                                 return NULL;
1317                 }
1318         }
1319
1320         return list_first_entry_or_null(&vsi->mac_filter_list,
1321                                         struct i40e_mac_filter, list);
1322 }
1323
1324 /**
1325  * i40e_rm_default_mac_filter - Remove the default MAC filter set by NVM
1326  * @vsi: the PF Main VSI - inappropriate for any other VSI
1327  * @macaddr: the MAC address
1328  *
1329  * Some older firmware configurations set up a default promiscuous VLAN
1330  * filter that needs to be removed.
1331  **/
1332 static int i40e_rm_default_mac_filter(struct i40e_vsi *vsi, u8 *macaddr)
1333 {
1334         struct i40e_aqc_remove_macvlan_element_data element;
1335         struct i40e_pf *pf = vsi->back;
1336         i40e_status ret;
1337
1338         /* Only appropriate for the PF main VSI */
1339         if (vsi->type != I40E_VSI_MAIN)
1340                 return -EINVAL;
1341
1342         memset(&element, 0, sizeof(element));
1343         ether_addr_copy(element.mac_addr, macaddr);
1344         element.vlan_tag = 0;
1345         element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH |
1346                         I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
1347         ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
1348         if (ret)
1349                 return -ENOENT;
1350
1351         return 0;
1352 }
1353
1354 /**
1355  * i40e_add_filter - Add a mac/vlan filter to the VSI
1356  * @vsi: the VSI to be searched
1357  * @macaddr: the MAC address
1358  * @vlan: the vlan
1359  * @is_vf: make sure its a VF filter, else doesn't matter
1360  * @is_netdev: make sure its a netdev filter, else doesn't matter
1361  *
1362  * Returns ptr to the filter object or NULL when no memory available.
1363  *
1364  * NOTE: This function is expected to be called with mac_filter_list_lock
1365  * being held.
1366  **/
1367 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1368                                         u8 *macaddr, s16 vlan,
1369                                         bool is_vf, bool is_netdev)
1370 {
1371         struct i40e_mac_filter *f;
1372
1373         if (!vsi || !macaddr)
1374                 return NULL;
1375
1376         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1377         if (!f) {
1378                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1379                 if (!f)
1380                         goto add_filter_out;
1381
1382                 ether_addr_copy(f->macaddr, macaddr);
1383                 f->vlan = vlan;
1384                 f->changed = true;
1385
1386                 INIT_LIST_HEAD(&f->list);
1387                 list_add(&f->list, &vsi->mac_filter_list);
1388         }
1389
1390         /* increment counter and add a new flag if needed */
1391         if (is_vf) {
1392                 if (!f->is_vf) {
1393                         f->is_vf = true;
1394                         f->counter++;
1395                 }
1396         } else if (is_netdev) {
1397                 if (!f->is_netdev) {
1398                         f->is_netdev = true;
1399                         f->counter++;
1400                 }
1401         } else {
1402                 f->counter++;
1403         }
1404
1405         /* changed tells sync_filters_subtask to
1406          * push the filter down to the firmware
1407          */
1408         if (f->changed) {
1409                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1410                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1411         }
1412
1413 add_filter_out:
1414         return f;
1415 }
1416
1417 /**
1418  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1419  * @vsi: the VSI to be searched
1420  * @macaddr: the MAC address
1421  * @vlan: the vlan
1422  * @is_vf: make sure it's a VF filter, else doesn't matter
1423  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1424  *
1425  * NOTE: This function is expected to be called with mac_filter_list_lock
1426  * being held.
1427  **/
1428 void i40e_del_filter(struct i40e_vsi *vsi,
1429                      u8 *macaddr, s16 vlan,
1430                      bool is_vf, bool is_netdev)
1431 {
1432         struct i40e_mac_filter *f;
1433
1434         if (!vsi || !macaddr)
1435                 return;
1436
1437         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1438         if (!f || f->counter == 0)
1439                 return;
1440
1441         if (is_vf) {
1442                 if (f->is_vf) {
1443                         f->is_vf = false;
1444                         f->counter--;
1445                 }
1446         } else if (is_netdev) {
1447                 if (f->is_netdev) {
1448                         f->is_netdev = false;
1449                         f->counter--;
1450                 }
1451         } else {
1452                 /* make sure we don't remove a filter in use by VF or netdev */
1453                 int min_f = 0;
1454
1455                 min_f += (f->is_vf ? 1 : 0);
1456                 min_f += (f->is_netdev ? 1 : 0);
1457
1458                 if (f->counter > min_f)
1459                         f->counter--;
1460         }
1461
1462         /* counter == 0 tells sync_filters_subtask to
1463          * remove the filter from the firmware's list
1464          */
1465         if (f->counter == 0) {
1466                 f->changed = true;
1467                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1468                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1469         }
1470 }
1471
1472 /**
1473  * i40e_set_mac - NDO callback to set mac address
1474  * @netdev: network interface device structure
1475  * @p: pointer to an address structure
1476  *
1477  * Returns 0 on success, negative on failure
1478  **/
1479 #ifdef I40E_FCOE
1480 int i40e_set_mac(struct net_device *netdev, void *p)
1481 #else
1482 static int i40e_set_mac(struct net_device *netdev, void *p)
1483 #endif
1484 {
1485         struct i40e_netdev_priv *np = netdev_priv(netdev);
1486         struct i40e_vsi *vsi = np->vsi;
1487         struct i40e_pf *pf = vsi->back;
1488         struct i40e_hw *hw = &pf->hw;
1489         struct sockaddr *addr = p;
1490         struct i40e_mac_filter *f;
1491
1492         if (!is_valid_ether_addr(addr->sa_data))
1493                 return -EADDRNOTAVAIL;
1494
1495         if (ether_addr_equal(netdev->dev_addr, addr->sa_data)) {
1496                 netdev_info(netdev, "already using mac address %pM\n",
1497                             addr->sa_data);
1498                 return 0;
1499         }
1500
1501         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1502             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1503                 return -EADDRNOTAVAIL;
1504
1505         if (ether_addr_equal(hw->mac.addr, addr->sa_data))
1506                 netdev_info(netdev, "returning to hw mac address %pM\n",
1507                             hw->mac.addr);
1508         else
1509                 netdev_info(netdev, "set new mac address %pM\n", addr->sa_data);
1510
1511         if (vsi->type == I40E_VSI_MAIN) {
1512                 i40e_status ret;
1513
1514                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1515                                                 I40E_AQC_WRITE_TYPE_LAA_WOL,
1516                                                 addr->sa_data, NULL);
1517                 if (ret) {
1518                         netdev_info(netdev,
1519                                     "Addr change for Main VSI failed: %d\n",
1520                                     ret);
1521                         return -EADDRNOTAVAIL;
1522                 }
1523         }
1524
1525         if (ether_addr_equal(netdev->dev_addr, hw->mac.addr)) {
1526                 struct i40e_aqc_remove_macvlan_element_data element;
1527
1528                 memset(&element, 0, sizeof(element));
1529                 ether_addr_copy(element.mac_addr, netdev->dev_addr);
1530                 element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1531                 i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
1532         } else {
1533                 spin_lock_bh(&vsi->mac_filter_list_lock);
1534                 i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1535                                 false, false);
1536                 spin_unlock_bh(&vsi->mac_filter_list_lock);
1537         }
1538
1539         if (ether_addr_equal(addr->sa_data, hw->mac.addr)) {
1540                 struct i40e_aqc_add_macvlan_element_data element;
1541
1542                 memset(&element, 0, sizeof(element));
1543                 ether_addr_copy(element.mac_addr, hw->mac.addr);
1544                 element.flags = cpu_to_le16(I40E_AQC_MACVLAN_ADD_PERFECT_MATCH);
1545                 i40e_aq_add_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
1546         } else {
1547                 spin_lock_bh(&vsi->mac_filter_list_lock);
1548                 f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY,
1549                                     false, false);
1550                 if (f)
1551                         f->is_laa = true;
1552                 spin_unlock_bh(&vsi->mac_filter_list_lock);
1553         }
1554
1555         i40e_sync_vsi_filters(vsi, false);
1556         ether_addr_copy(netdev->dev_addr, addr->sa_data);
1557
1558         return 0;
1559 }
1560
1561 /**
1562  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1563  * @vsi: the VSI being setup
1564  * @ctxt: VSI context structure
1565  * @enabled_tc: Enabled TCs bitmap
1566  * @is_add: True if called before Add VSI
1567  *
1568  * Setup VSI queue mapping for enabled traffic classes.
1569  **/
1570 #ifdef I40E_FCOE
1571 void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1572                               struct i40e_vsi_context *ctxt,
1573                               u8 enabled_tc,
1574                               bool is_add)
1575 #else
1576 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1577                                      struct i40e_vsi_context *ctxt,
1578                                      u8 enabled_tc,
1579                                      bool is_add)
1580 #endif
1581 {
1582         struct i40e_pf *pf = vsi->back;
1583         u16 sections = 0;
1584         u8 netdev_tc = 0;
1585         u16 numtc = 0;
1586         u16 qcount;
1587         u8 offset;
1588         u16 qmap;
1589         int i;
1590         u16 num_tc_qps = 0;
1591
1592         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1593         offset = 0;
1594
1595         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1596                 /* Find numtc from enabled TC bitmap */
1597                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1598                         if (enabled_tc & BIT_ULL(i)) /* TC is enabled */
1599                                 numtc++;
1600                 }
1601                 if (!numtc) {
1602                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1603                         numtc = 1;
1604                 }
1605         } else {
1606                 /* At least TC0 is enabled in case of non-DCB case */
1607                 numtc = 1;
1608         }
1609
1610         vsi->tc_config.numtc = numtc;
1611         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1612         /* Number of queues per enabled TC */
1613         /* In MFP case we can have a much lower count of MSIx
1614          * vectors available and so we need to lower the used
1615          * q count.
1616          */
1617         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
1618                 qcount = min_t(int, vsi->alloc_queue_pairs, pf->num_lan_msix);
1619         else
1620                 qcount = vsi->alloc_queue_pairs;
1621         num_tc_qps = qcount / numtc;
1622         num_tc_qps = min_t(int, num_tc_qps, i40e_pf_get_max_q_per_tc(pf));
1623
1624         /* Setup queue offset/count for all TCs for given VSI */
1625         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1626                 /* See if the given TC is enabled for the given VSI */
1627                 if (vsi->tc_config.enabled_tc & BIT_ULL(i)) {
1628                         /* TC is enabled */
1629                         int pow, num_qps;
1630
1631                         switch (vsi->type) {
1632                         case I40E_VSI_MAIN:
1633                                 qcount = min_t(int, pf->rss_size, num_tc_qps);
1634                                 break;
1635 #ifdef I40E_FCOE
1636                         case I40E_VSI_FCOE:
1637                                 qcount = num_tc_qps;
1638                                 break;
1639 #endif
1640                         case I40E_VSI_FDIR:
1641                         case I40E_VSI_SRIOV:
1642                         case I40E_VSI_VMDQ2:
1643                         default:
1644                                 qcount = num_tc_qps;
1645                                 WARN_ON(i != 0);
1646                                 break;
1647                         }
1648                         vsi->tc_config.tc_info[i].qoffset = offset;
1649                         vsi->tc_config.tc_info[i].qcount = qcount;
1650
1651                         /* find the next higher power-of-2 of num queue pairs */
1652                         num_qps = qcount;
1653                         pow = 0;
1654                         while (num_qps && (BIT_ULL(pow) < qcount)) {
1655                                 pow++;
1656                                 num_qps >>= 1;
1657                         }
1658
1659                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1660                         qmap =
1661                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1662                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1663
1664                         offset += qcount;
1665                 } else {
1666                         /* TC is not enabled so set the offset to
1667                          * default queue and allocate one queue
1668                          * for the given TC.
1669                          */
1670                         vsi->tc_config.tc_info[i].qoffset = 0;
1671                         vsi->tc_config.tc_info[i].qcount = 1;
1672                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1673
1674                         qmap = 0;
1675                 }
1676                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1677         }
1678
1679         /* Set actual Tx/Rx queue pairs */
1680         vsi->num_queue_pairs = offset;
1681         if ((vsi->type == I40E_VSI_MAIN) && (numtc == 1)) {
1682                 if (vsi->req_queue_pairs > 0)
1683                         vsi->num_queue_pairs = vsi->req_queue_pairs;
1684                 else if (pf->flags & I40E_FLAG_MSIX_ENABLED)
1685                         vsi->num_queue_pairs = pf->num_lan_msix;
1686         }
1687
1688         /* Scheduler section valid can only be set for ADD VSI */
1689         if (is_add) {
1690                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1691
1692                 ctxt->info.up_enable_bits = enabled_tc;
1693         }
1694         if (vsi->type == I40E_VSI_SRIOV) {
1695                 ctxt->info.mapping_flags |=
1696                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1697                 for (i = 0; i < vsi->num_queue_pairs; i++)
1698                         ctxt->info.queue_mapping[i] =
1699                                                cpu_to_le16(vsi->base_queue + i);
1700         } else {
1701                 ctxt->info.mapping_flags |=
1702                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1703                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1704         }
1705         ctxt->info.valid_sections |= cpu_to_le16(sections);
1706 }
1707
1708 /**
1709  * i40e_set_rx_mode - NDO callback to set the netdev filters
1710  * @netdev: network interface device structure
1711  **/
1712 #ifdef I40E_FCOE
1713 void i40e_set_rx_mode(struct net_device *netdev)
1714 #else
1715 static void i40e_set_rx_mode(struct net_device *netdev)
1716 #endif
1717 {
1718         struct i40e_netdev_priv *np = netdev_priv(netdev);
1719         struct i40e_mac_filter *f, *ftmp;
1720         struct i40e_vsi *vsi = np->vsi;
1721         struct netdev_hw_addr *uca;
1722         struct netdev_hw_addr *mca;
1723         struct netdev_hw_addr *ha;
1724
1725         spin_lock_bh(&vsi->mac_filter_list_lock);
1726
1727         /* add addr if not already in the filter list */
1728         netdev_for_each_uc_addr(uca, netdev) {
1729                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1730                         if (i40e_is_vsi_in_vlan(vsi))
1731                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1732                                                      false, true);
1733                         else
1734                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1735                                                 false, true);
1736                 }
1737         }
1738
1739         netdev_for_each_mc_addr(mca, netdev) {
1740                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1741                         if (i40e_is_vsi_in_vlan(vsi))
1742                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1743                                                      false, true);
1744                         else
1745                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1746                                                 false, true);
1747                 }
1748         }
1749
1750         /* remove filter if not in netdev list */
1751         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1752
1753                 if (!f->is_netdev)
1754                         continue;
1755
1756                 netdev_for_each_mc_addr(mca, netdev)
1757                         if (ether_addr_equal(mca->addr, f->macaddr))
1758                                 goto bottom_of_search_loop;
1759
1760                 netdev_for_each_uc_addr(uca, netdev)
1761                         if (ether_addr_equal(uca->addr, f->macaddr))
1762                                 goto bottom_of_search_loop;
1763
1764                 for_each_dev_addr(netdev, ha)
1765                         if (ether_addr_equal(ha->addr, f->macaddr))
1766                                 goto bottom_of_search_loop;
1767
1768                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
1769                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1770
1771 bottom_of_search_loop:
1772                 continue;
1773         }
1774         spin_unlock_bh(&vsi->mac_filter_list_lock);
1775
1776         /* check for other flag changes */
1777         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1778                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1779                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1780         }
1781 }
1782
1783 /**
1784  * i40e_mac_filter_entry_clone - Clones a MAC filter entry
1785  * @src: source MAC filter entry to be clones
1786  *
1787  * Returns the pointer to newly cloned MAC filter entry or NULL
1788  * in case of error
1789  **/
1790 static struct i40e_mac_filter *i40e_mac_filter_entry_clone(
1791                                         struct i40e_mac_filter *src)
1792 {
1793         struct i40e_mac_filter *f;
1794
1795         f = kzalloc(sizeof(*f), GFP_ATOMIC);
1796         if (!f)
1797                 return NULL;
1798         *f = *src;
1799
1800         INIT_LIST_HEAD(&f->list);
1801
1802         return f;
1803 }
1804
1805 /**
1806  * i40e_undo_del_filter_entries - Undo the changes made to MAC filter entries
1807  * @vsi: pointer to vsi struct
1808  * @from: Pointer to list which contains MAC filter entries - changes to
1809  *        those entries needs to be undone.
1810  *
1811  * MAC filter entries from list were slated to be removed from device.
1812  **/
1813 static void i40e_undo_del_filter_entries(struct i40e_vsi *vsi,
1814                                          struct list_head *from)
1815 {
1816         struct i40e_mac_filter *f, *ftmp;
1817
1818         list_for_each_entry_safe(f, ftmp, from, list) {
1819                 f->changed = true;
1820                 /* Move the element back into MAC filter list*/
1821                 list_move_tail(&f->list, &vsi->mac_filter_list);
1822         }
1823 }
1824
1825 /**
1826  * i40e_undo_add_filter_entries - Undo the changes made to MAC filter entries
1827  * @vsi: pointer to vsi struct
1828  *
1829  * MAC filter entries from list were slated to be added from device.
1830  **/
1831 static void i40e_undo_add_filter_entries(struct i40e_vsi *vsi)
1832 {
1833         struct i40e_mac_filter *f, *ftmp;
1834
1835         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1836                 if (!f->changed && f->counter)
1837                         f->changed = true;
1838         }
1839 }
1840
1841 /**
1842  * i40e_cleanup_add_list - Deletes the element from add list and release
1843  *                      memory
1844  * @add_list: Pointer to list which contains MAC filter entries
1845  **/
1846 static void i40e_cleanup_add_list(struct list_head *add_list)
1847 {
1848         struct i40e_mac_filter *f, *ftmp;
1849
1850         list_for_each_entry_safe(f, ftmp, add_list, list) {
1851                 list_del(&f->list);
1852                 kfree(f);
1853         }
1854 }
1855
1856 /**
1857  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1858  * @vsi: ptr to the VSI
1859  * @grab_rtnl: whether RTNL needs to be grabbed
1860  *
1861  * Push any outstanding VSI filter changes through the AdminQ.
1862  *
1863  * Returns 0 or error value
1864  **/
1865 int i40e_sync_vsi_filters(struct i40e_vsi *vsi, bool grab_rtnl)
1866 {
1867         struct list_head tmp_del_list, tmp_add_list;
1868         struct i40e_mac_filter *f, *ftmp, *fclone;
1869         bool promisc_forced_on = false;
1870         bool add_happened = false;
1871         int filter_list_len = 0;
1872         u32 changed_flags = 0;
1873         bool err_cond = false;
1874         i40e_status ret = 0;
1875         struct i40e_pf *pf;
1876         int num_add = 0;
1877         int num_del = 0;
1878         int aq_err = 0;
1879         u16 cmd_flags;
1880
1881         /* empty array typed pointers, kcalloc later */
1882         struct i40e_aqc_add_macvlan_element_data *add_list;
1883         struct i40e_aqc_remove_macvlan_element_data *del_list;
1884
1885         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1886                 usleep_range(1000, 2000);
1887         pf = vsi->back;
1888
1889         if (vsi->netdev) {
1890                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1891                 vsi->current_netdev_flags = vsi->netdev->flags;
1892         }
1893
1894         INIT_LIST_HEAD(&tmp_del_list);
1895         INIT_LIST_HEAD(&tmp_add_list);
1896
1897         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1898                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1899
1900                 spin_lock_bh(&vsi->mac_filter_list_lock);
1901                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1902                         if (!f->changed)
1903                                 continue;
1904
1905                         if (f->counter != 0)
1906                                 continue;
1907                         f->changed = false;
1908
1909                         /* Move the element into temporary del_list */
1910                         list_move_tail(&f->list, &tmp_del_list);
1911                 }
1912
1913                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1914                         if (!f->changed)
1915                                 continue;
1916
1917                         if (f->counter == 0)
1918                                 continue;
1919                         f->changed = false;
1920
1921                         /* Clone MAC filter entry and add into temporary list */
1922                         fclone = i40e_mac_filter_entry_clone(f);
1923                         if (!fclone) {
1924                                 err_cond = true;
1925                                 break;
1926                         }
1927                         list_add_tail(&fclone->list, &tmp_add_list);
1928                 }
1929
1930                 /* if failed to clone MAC filter entry - undo */
1931                 if (err_cond) {
1932                         i40e_undo_del_filter_entries(vsi, &tmp_del_list);
1933                         i40e_undo_add_filter_entries(vsi);
1934                 }
1935                 spin_unlock_bh(&vsi->mac_filter_list_lock);
1936
1937                 if (err_cond)
1938                         i40e_cleanup_add_list(&tmp_add_list);
1939         }
1940
1941         /* Now process 'del_list' outside the lock */
1942         if (!list_empty(&tmp_del_list)) {
1943                 filter_list_len = pf->hw.aq.asq_buf_size /
1944                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1945                 del_list = kcalloc(filter_list_len,
1946                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1947                             GFP_KERNEL);
1948                 if (!del_list) {
1949                         i40e_cleanup_add_list(&tmp_add_list);
1950
1951                         /* Undo VSI's MAC filter entry element updates */
1952                         spin_lock_bh(&vsi->mac_filter_list_lock);
1953                         i40e_undo_del_filter_entries(vsi, &tmp_del_list);
1954                         i40e_undo_add_filter_entries(vsi);
1955                         spin_unlock_bh(&vsi->mac_filter_list_lock);
1956                         return -ENOMEM;
1957                 }
1958
1959                 list_for_each_entry_safe(f, ftmp, &tmp_del_list, list) {
1960                         cmd_flags = 0;
1961
1962                         /* add to delete list */
1963                         ether_addr_copy(del_list[num_del].mac_addr, f->macaddr);
1964                         del_list[num_del].vlan_tag =
1965                                 cpu_to_le16((u16)(f->vlan ==
1966                                             I40E_VLAN_ANY ? 0 : f->vlan));
1967
1968                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1969                         del_list[num_del].flags = cmd_flags;
1970                         num_del++;
1971
1972                         /* flush a full buffer */
1973                         if (num_del == filter_list_len) {
1974                                 ret = i40e_aq_remove_macvlan(&pf->hw,
1975                                                   vsi->seid, del_list, num_del,
1976                                                   NULL);
1977                                 aq_err = pf->hw.aq.asq_last_status;
1978                                 num_del = 0;
1979                                 memset(del_list, 0, sizeof(*del_list));
1980
1981                                 if (ret && aq_err != I40E_AQ_RC_ENOENT)
1982                                         dev_err(&pf->pdev->dev,
1983                                                 "ignoring delete macvlan error, err %s, aq_err %s while flushing a full buffer\n",
1984                                                 i40e_stat_str(&pf->hw, ret),
1985                                                 i40e_aq_str(&pf->hw, aq_err));
1986                         }
1987                         /* Release memory for MAC filter entries which were
1988                          * synced up with HW.
1989                          */
1990                         list_del(&f->list);
1991                         kfree(f);
1992                 }
1993
1994                 if (num_del) {
1995                         ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1996                                                      del_list, num_del, NULL);
1997                         aq_err = pf->hw.aq.asq_last_status;
1998                         num_del = 0;
1999
2000                         if (ret && aq_err != I40E_AQ_RC_ENOENT)
2001                                 dev_info(&pf->pdev->dev,
2002                                          "ignoring delete macvlan error, err %s aq_err %s\n",
2003                                          i40e_stat_str(&pf->hw, ret),
2004                                          i40e_aq_str(&pf->hw, aq_err));
2005                 }
2006
2007                 kfree(del_list);
2008                 del_list = NULL;
2009         }
2010
2011         if (!list_empty(&tmp_add_list)) {
2012
2013                 /* do all the adds now */
2014                 filter_list_len = pf->hw.aq.asq_buf_size /
2015                                sizeof(struct i40e_aqc_add_macvlan_element_data),
2016                 add_list = kcalloc(filter_list_len,
2017                                sizeof(struct i40e_aqc_add_macvlan_element_data),
2018                                GFP_KERNEL);
2019                 if (!add_list) {
2020                         /* Purge element from temporary lists */
2021                         i40e_cleanup_add_list(&tmp_add_list);
2022
2023                         /* Undo add filter entries from VSI MAC filter list */
2024                         spin_lock_bh(&vsi->mac_filter_list_lock);
2025                         i40e_undo_add_filter_entries(vsi);
2026                         spin_unlock_bh(&vsi->mac_filter_list_lock);
2027                         return -ENOMEM;
2028                 }
2029
2030                 list_for_each_entry_safe(f, ftmp, &tmp_add_list, list) {
2031
2032                         add_happened = true;
2033                         cmd_flags = 0;
2034
2035                         /* add to add array */
2036                         ether_addr_copy(add_list[num_add].mac_addr, f->macaddr);
2037                         add_list[num_add].vlan_tag =
2038                                 cpu_to_le16(
2039                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
2040                         add_list[num_add].queue_number = 0;
2041
2042                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
2043                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
2044                         num_add++;
2045
2046                         /* flush a full buffer */
2047                         if (num_add == filter_list_len) {
2048                                 ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
2049                                                           add_list, num_add,
2050                                                           NULL);
2051                                 aq_err = pf->hw.aq.asq_last_status;
2052                                 num_add = 0;
2053
2054                                 if (ret)
2055                                         break;
2056                                 memset(add_list, 0, sizeof(*add_list));
2057                         }
2058                         /* Entries from tmp_add_list were cloned from MAC
2059                          * filter list, hence clean those cloned entries
2060                          */
2061                         list_del(&f->list);
2062                         kfree(f);
2063                 }
2064
2065                 if (num_add) {
2066                         ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
2067                                                   add_list, num_add, NULL);
2068                         aq_err = pf->hw.aq.asq_last_status;
2069                         num_add = 0;
2070                 }
2071                 kfree(add_list);
2072                 add_list = NULL;
2073
2074                 if (add_happened && ret && aq_err != I40E_AQ_RC_EINVAL) {
2075                         dev_info(&pf->pdev->dev,
2076                                  "add filter failed, err %s aq_err %s\n",
2077                                  i40e_stat_str(&pf->hw, ret),
2078                                  i40e_aq_str(&pf->hw, aq_err));
2079                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
2080                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
2081                                       &vsi->state)) {
2082                                 promisc_forced_on = true;
2083                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
2084                                         &vsi->state);
2085                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
2086                         }
2087                 }
2088         }
2089
2090         /* check for changes in promiscuous modes */
2091         if (changed_flags & IFF_ALLMULTI) {
2092                 bool cur_multipromisc;
2093
2094                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
2095                 ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
2096                                                             vsi->seid,
2097                                                             cur_multipromisc,
2098                                                             NULL);
2099                 if (ret)
2100                         dev_info(&pf->pdev->dev,
2101                                  "set multi promisc failed, err %s aq_err %s\n",
2102                                  i40e_stat_str(&pf->hw, ret),
2103                                  i40e_aq_str(&pf->hw,
2104                                              pf->hw.aq.asq_last_status));
2105         }
2106         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
2107                 bool cur_promisc;
2108
2109                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
2110                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
2111                                         &vsi->state));
2112                 if (vsi->type == I40E_VSI_MAIN && pf->lan_veb != I40E_NO_VEB) {
2113                         /* set defport ON for Main VSI instead of true promisc
2114                          * this way we will get all unicast/multicast and VLAN
2115                          * promisc behavior but will not get VF or VMDq traffic
2116                          * replicated on the Main VSI.
2117                          */
2118                         if (pf->cur_promisc != cur_promisc) {
2119                                 pf->cur_promisc = cur_promisc;
2120                                 if (grab_rtnl)
2121                                         i40e_do_reset_safe(pf,
2122                                                 BIT(__I40E_PF_RESET_REQUESTED));
2123                                 else
2124                                         i40e_do_reset(pf,
2125                                                 BIT(__I40E_PF_RESET_REQUESTED));
2126                         }
2127                 } else {
2128                         ret = i40e_aq_set_vsi_unicast_promiscuous(
2129                                                           &vsi->back->hw,
2130                                                           vsi->seid,
2131                                                           cur_promisc, NULL);
2132                         if (ret)
2133                                 dev_info(&pf->pdev->dev,
2134                                          "set unicast promisc failed, err %d, aq_err %d\n",
2135                                          ret, pf->hw.aq.asq_last_status);
2136                         ret = i40e_aq_set_vsi_multicast_promiscuous(
2137                                                           &vsi->back->hw,
2138                                                           vsi->seid,
2139                                                           cur_promisc, NULL);
2140                         if (ret)
2141                                 dev_info(&pf->pdev->dev,
2142                                          "set multicast promisc failed, err %d, aq_err %d\n",
2143                                          ret, pf->hw.aq.asq_last_status);
2144                 }
2145                 ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
2146                                                 vsi->seid,
2147                                                 cur_promisc, NULL);
2148                 if (ret)
2149                         dev_info(&pf->pdev->dev,
2150                                  "set brdcast promisc failed, err %s, aq_err %s\n",
2151                                  i40e_stat_str(&pf->hw, ret),
2152                                  i40e_aq_str(&pf->hw,
2153                                              pf->hw.aq.asq_last_status));
2154         }
2155
2156         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
2157         return 0;
2158 }
2159
2160 /**
2161  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
2162  * @pf: board private structure
2163  **/
2164 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
2165 {
2166         int v;
2167
2168         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
2169                 return;
2170         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
2171
2172         for (v = 0; v < pf->num_alloc_vsi; v++) {
2173                 if (pf->vsi[v] &&
2174                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
2175                         i40e_sync_vsi_filters(pf->vsi[v], true);
2176         }
2177 }
2178
2179 /**
2180  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
2181  * @netdev: network interface device structure
2182  * @new_mtu: new value for maximum frame size
2183  *
2184  * Returns 0 on success, negative on failure
2185  **/
2186 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
2187 {
2188         struct i40e_netdev_priv *np = netdev_priv(netdev);
2189         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
2190         struct i40e_vsi *vsi = np->vsi;
2191
2192         /* MTU < 68 is an error and causes problems on some kernels */
2193         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2194                 return -EINVAL;
2195
2196         netdev_info(netdev, "changing MTU from %d to %d\n",
2197                     netdev->mtu, new_mtu);
2198         netdev->mtu = new_mtu;
2199         if (netif_running(netdev))
2200                 i40e_vsi_reinit_locked(vsi);
2201
2202         return 0;
2203 }
2204
2205 /**
2206  * i40e_ioctl - Access the hwtstamp interface
2207  * @netdev: network interface device structure
2208  * @ifr: interface request data
2209  * @cmd: ioctl command
2210  **/
2211 int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2212 {
2213         struct i40e_netdev_priv *np = netdev_priv(netdev);
2214         struct i40e_pf *pf = np->vsi->back;
2215
2216         switch (cmd) {
2217         case SIOCGHWTSTAMP:
2218                 return i40e_ptp_get_ts_config(pf, ifr);
2219         case SIOCSHWTSTAMP:
2220                 return i40e_ptp_set_ts_config(pf, ifr);
2221         default:
2222                 return -EOPNOTSUPP;
2223         }
2224 }
2225
2226 /**
2227  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
2228  * @vsi: the vsi being adjusted
2229  **/
2230 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
2231 {
2232         struct i40e_vsi_context ctxt;
2233         i40e_status ret;
2234
2235         if ((vsi->info.valid_sections &
2236              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
2237             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
2238                 return;  /* already enabled */
2239
2240         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2241         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
2242                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
2243
2244         ctxt.seid = vsi->seid;
2245         ctxt.info = vsi->info;
2246         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2247         if (ret) {
2248                 dev_info(&vsi->back->pdev->dev,
2249                          "update vlan stripping failed, err %s aq_err %s\n",
2250                          i40e_stat_str(&vsi->back->hw, ret),
2251                          i40e_aq_str(&vsi->back->hw,
2252                                      vsi->back->hw.aq.asq_last_status));
2253         }
2254 }
2255
2256 /**
2257  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
2258  * @vsi: the vsi being adjusted
2259  **/
2260 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
2261 {
2262         struct i40e_vsi_context ctxt;
2263         i40e_status ret;
2264
2265         if ((vsi->info.valid_sections &
2266              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
2267             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
2268              I40E_AQ_VSI_PVLAN_EMOD_MASK))
2269                 return;  /* already disabled */
2270
2271         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2272         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
2273                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
2274
2275         ctxt.seid = vsi->seid;
2276         ctxt.info = vsi->info;
2277         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2278         if (ret) {
2279                 dev_info(&vsi->back->pdev->dev,
2280                          "update vlan stripping failed, err %s aq_err %s\n",
2281                          i40e_stat_str(&vsi->back->hw, ret),
2282                          i40e_aq_str(&vsi->back->hw,
2283                                      vsi->back->hw.aq.asq_last_status));
2284         }
2285 }
2286
2287 /**
2288  * i40e_vlan_rx_register - Setup or shutdown vlan offload
2289  * @netdev: network interface to be adjusted
2290  * @features: netdev features to test if VLAN offload is enabled or not
2291  **/
2292 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
2293 {
2294         struct i40e_netdev_priv *np = netdev_priv(netdev);
2295         struct i40e_vsi *vsi = np->vsi;
2296
2297         if (features & NETIF_F_HW_VLAN_CTAG_RX)
2298                 i40e_vlan_stripping_enable(vsi);
2299         else
2300                 i40e_vlan_stripping_disable(vsi);
2301 }
2302
2303 /**
2304  * i40e_vsi_add_vlan - Add vsi membership for given vlan
2305  * @vsi: the vsi being configured
2306  * @vid: vlan id to be added (0 = untagged only , -1 = any)
2307  **/
2308 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
2309 {
2310         struct i40e_mac_filter *f, *add_f;
2311         bool is_netdev, is_vf;
2312
2313         is_vf = (vsi->type == I40E_VSI_SRIOV);
2314         is_netdev = !!(vsi->netdev);
2315
2316         /* Locked once because all functions invoked below iterates list*/
2317         spin_lock_bh(&vsi->mac_filter_list_lock);
2318
2319         if (is_netdev) {
2320                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
2321                                         is_vf, is_netdev);
2322                 if (!add_f) {
2323                         dev_info(&vsi->back->pdev->dev,
2324                                  "Could not add vlan filter %d for %pM\n",
2325                                  vid, vsi->netdev->dev_addr);
2326                         spin_unlock_bh(&vsi->mac_filter_list_lock);
2327                         return -ENOMEM;
2328                 }
2329         }
2330
2331         list_for_each_entry(f, &vsi->mac_filter_list, list) {
2332                 add_f = i40e_add_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
2333                 if (!add_f) {
2334                         dev_info(&vsi->back->pdev->dev,
2335                                  "Could not add vlan filter %d for %pM\n",
2336                                  vid, f->macaddr);
2337                         spin_unlock_bh(&vsi->mac_filter_list_lock);
2338                         return -ENOMEM;
2339                 }
2340         }
2341
2342         /* Now if we add a vlan tag, make sure to check if it is the first
2343          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
2344          * with 0, so we now accept untagged and specified tagged traffic
2345          * (and not any taged and untagged)
2346          */
2347         if (vid > 0) {
2348                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
2349                                                   I40E_VLAN_ANY,
2350                                                   is_vf, is_netdev)) {
2351                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
2352                                         I40E_VLAN_ANY, is_vf, is_netdev);
2353                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
2354                                                 is_vf, is_netdev);
2355                         if (!add_f) {
2356                                 dev_info(&vsi->back->pdev->dev,
2357                                          "Could not add filter 0 for %pM\n",
2358                                          vsi->netdev->dev_addr);
2359                                 spin_unlock_bh(&vsi->mac_filter_list_lock);
2360                                 return -ENOMEM;
2361                         }
2362                 }
2363         }
2364
2365         /* Do not assume that I40E_VLAN_ANY should be reset to VLAN 0 */
2366         if (vid > 0 && !vsi->info.pvid) {
2367                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
2368                         if (!i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
2369                                               is_vf, is_netdev))
2370                                 continue;
2371                         i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
2372                                         is_vf, is_netdev);
2373                         add_f = i40e_add_filter(vsi, f->macaddr,
2374                                                 0, is_vf, is_netdev);
2375                         if (!add_f) {
2376                                 dev_info(&vsi->back->pdev->dev,
2377                                          "Could not add filter 0 for %pM\n",
2378                                         f->macaddr);
2379                                 spin_unlock_bh(&vsi->mac_filter_list_lock);
2380                                 return -ENOMEM;
2381                         }
2382                 }
2383         }
2384
2385         /* Make sure to release before sync_vsi_filter because that
2386          * function will lock/unlock as necessary
2387          */
2388         spin_unlock_bh(&vsi->mac_filter_list_lock);
2389
2390         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
2391             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
2392                 return 0;
2393
2394         return i40e_sync_vsi_filters(vsi, false);
2395 }
2396
2397 /**
2398  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
2399  * @vsi: the vsi being configured
2400  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
2401  *
2402  * Return: 0 on success or negative otherwise
2403  **/
2404 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
2405 {
2406         struct net_device *netdev = vsi->netdev;
2407         struct i40e_mac_filter *f, *add_f;
2408         bool is_vf, is_netdev;
2409         int filter_count = 0;
2410
2411         is_vf = (vsi->type == I40E_VSI_SRIOV);
2412         is_netdev = !!(netdev);
2413
2414         /* Locked once because all functions invoked below iterates list */
2415         spin_lock_bh(&vsi->mac_filter_list_lock);
2416
2417         if (is_netdev)
2418                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
2419
2420         list_for_each_entry(f, &vsi->mac_filter_list, list)
2421                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
2422
2423         /* go through all the filters for this VSI and if there is only
2424          * vid == 0 it means there are no other filters, so vid 0 must
2425          * be replaced with -1. This signifies that we should from now
2426          * on accept any traffic (with any tag present, or untagged)
2427          */
2428         list_for_each_entry(f, &vsi->mac_filter_list, list) {
2429                 if (is_netdev) {
2430                         if (f->vlan &&
2431                             ether_addr_equal(netdev->dev_addr, f->macaddr))
2432                                 filter_count++;
2433                 }
2434
2435                 if (f->vlan)
2436                         filter_count++;
2437         }
2438
2439         if (!filter_count && is_netdev) {
2440                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
2441                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
2442                                     is_vf, is_netdev);
2443                 if (!f) {
2444                         dev_info(&vsi->back->pdev->dev,
2445                                  "Could not add filter %d for %pM\n",
2446                                  I40E_VLAN_ANY, netdev->dev_addr);
2447                         spin_unlock_bh(&vsi->mac_filter_list_lock);
2448                         return -ENOMEM;
2449                 }
2450         }
2451
2452         if (!filter_count) {
2453                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
2454                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
2455                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
2456                                                 is_vf, is_netdev);
2457                         if (!add_f) {
2458                                 dev_info(&vsi->back->pdev->dev,
2459                                          "Could not add filter %d for %pM\n",
2460                                          I40E_VLAN_ANY, f->macaddr);
2461                                 spin_unlock_bh(&vsi->mac_filter_list_lock);
2462                                 return -ENOMEM;
2463                         }
2464                 }
2465         }
2466
2467         /* Make sure to release before sync_vsi_filter because that
2468          * function with lock/unlock as necessary
2469          */
2470         spin_unlock_bh(&vsi->mac_filter_list_lock);
2471
2472         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
2473             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
2474                 return 0;
2475
2476         return i40e_sync_vsi_filters(vsi, false);
2477 }
2478
2479 /**
2480  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
2481  * @netdev: network interface to be adjusted
2482  * @vid: vlan id to be added
2483  *
2484  * net_device_ops implementation for adding vlan ids
2485  **/
2486 #ifdef I40E_FCOE
2487 int i40e_vlan_rx_add_vid(struct net_device *netdev,
2488                          __always_unused __be16 proto, u16 vid)
2489 #else
2490 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
2491                                 __always_unused __be16 proto, u16 vid)
2492 #endif
2493 {
2494         struct i40e_netdev_priv *np = netdev_priv(netdev);
2495         struct i40e_vsi *vsi = np->vsi;
2496         int ret = 0;
2497
2498         if (vid > 4095)
2499                 return -EINVAL;
2500
2501         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
2502
2503         /* If the network stack called us with vid = 0 then
2504          * it is asking to receive priority tagged packets with
2505          * vlan id 0.  Our HW receives them by default when configured
2506          * to receive untagged packets so there is no need to add an
2507          * extra filter for vlan 0 tagged packets.
2508          */
2509         if (vid)
2510                 ret = i40e_vsi_add_vlan(vsi, vid);
2511
2512         if (!ret && (vid < VLAN_N_VID))
2513                 set_bit(vid, vsi->active_vlans);
2514
2515         return ret;
2516 }
2517
2518 /**
2519  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
2520  * @netdev: network interface to be adjusted
2521  * @vid: vlan id to be removed
2522  *
2523  * net_device_ops implementation for removing vlan ids
2524  **/
2525 #ifdef I40E_FCOE
2526 int i40e_vlan_rx_kill_vid(struct net_device *netdev,
2527                           __always_unused __be16 proto, u16 vid)
2528 #else
2529 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
2530                                  __always_unused __be16 proto, u16 vid)
2531 #endif
2532 {
2533         struct i40e_netdev_priv *np = netdev_priv(netdev);
2534         struct i40e_vsi *vsi = np->vsi;
2535
2536         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
2537
2538         /* return code is ignored as there is nothing a user
2539          * can do about failure to remove and a log message was
2540          * already printed from the other function
2541          */
2542         i40e_vsi_kill_vlan(vsi, vid);
2543
2544         clear_bit(vid, vsi->active_vlans);
2545
2546         return 0;
2547 }
2548
2549 /**
2550  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
2551  * @vsi: the vsi being brought back up
2552  **/
2553 static void i40e_restore_vlan(struct i40e_vsi *vsi)
2554 {
2555         u16 vid;
2556
2557         if (!vsi->netdev)
2558                 return;
2559
2560         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2561
2562         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
2563                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
2564                                      vid);
2565 }
2566
2567 /**
2568  * i40e_vsi_add_pvid - Add pvid for the VSI
2569  * @vsi: the vsi being adjusted
2570  * @vid: the vlan id to set as a PVID
2571  **/
2572 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2573 {
2574         struct i40e_vsi_context ctxt;
2575         i40e_status ret;
2576
2577         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2578         vsi->info.pvid = cpu_to_le16(vid);
2579         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
2580                                     I40E_AQ_VSI_PVLAN_INSERT_PVID |
2581                                     I40E_AQ_VSI_PVLAN_EMOD_STR;
2582
2583         ctxt.seid = vsi->seid;
2584         ctxt.info = vsi->info;
2585         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2586         if (ret) {
2587                 dev_info(&vsi->back->pdev->dev,
2588                          "add pvid failed, err %s aq_err %s\n",
2589                          i40e_stat_str(&vsi->back->hw, ret),
2590                          i40e_aq_str(&vsi->back->hw,
2591                                      vsi->back->hw.aq.asq_last_status));
2592                 return -ENOENT;
2593         }
2594
2595         return 0;
2596 }
2597
2598 /**
2599  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2600  * @vsi: the vsi being adjusted
2601  *
2602  * Just use the vlan_rx_register() service to put it back to normal
2603  **/
2604 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2605 {
2606         i40e_vlan_stripping_disable(vsi);
2607
2608         vsi->info.pvid = 0;
2609 }
2610
2611 /**
2612  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2613  * @vsi: ptr to the VSI
2614  *
2615  * If this function returns with an error, then it's possible one or
2616  * more of the rings is populated (while the rest are not).  It is the
2617  * callers duty to clean those orphaned rings.
2618  *
2619  * Return 0 on success, negative on failure
2620  **/
2621 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2622 {
2623         int i, err = 0;
2624
2625         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2626                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2627
2628         return err;
2629 }
2630
2631 /**
2632  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2633  * @vsi: ptr to the VSI
2634  *
2635  * Free VSI's transmit software resources
2636  **/
2637 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2638 {
2639         int i;
2640
2641         if (!vsi->tx_rings)
2642                 return;
2643
2644         for (i = 0; i < vsi->num_queue_pairs; i++)
2645                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
2646                         i40e_free_tx_resources(vsi->tx_rings[i]);
2647 }
2648
2649 /**
2650  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2651  * @vsi: ptr to the VSI
2652  *
2653  * If this function returns with an error, then it's possible one or
2654  * more of the rings is populated (while the rest are not).  It is the
2655  * callers duty to clean those orphaned rings.
2656  *
2657  * Return 0 on success, negative on failure
2658  **/
2659 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2660 {
2661         int i, err = 0;
2662
2663         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2664                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2665 #ifdef I40E_FCOE
2666         i40e_fcoe_setup_ddp_resources(vsi);
2667 #endif
2668         return err;
2669 }
2670
2671 /**
2672  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2673  * @vsi: ptr to the VSI
2674  *
2675  * Free all receive software resources
2676  **/
2677 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2678 {
2679         int i;
2680
2681         if (!vsi->rx_rings)
2682                 return;
2683
2684         for (i = 0; i < vsi->num_queue_pairs; i++)
2685                 if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
2686                         i40e_free_rx_resources(vsi->rx_rings[i]);
2687 #ifdef I40E_FCOE
2688         i40e_fcoe_free_ddp_resources(vsi);
2689 #endif
2690 }
2691
2692 /**
2693  * i40e_config_xps_tx_ring - Configure XPS for a Tx ring
2694  * @ring: The Tx ring to configure
2695  *
2696  * This enables/disables XPS for a given Tx descriptor ring
2697  * based on the TCs enabled for the VSI that ring belongs to.
2698  **/
2699 static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
2700 {
2701         struct i40e_vsi *vsi = ring->vsi;
2702         cpumask_var_t mask;
2703
2704         if (!ring->q_vector || !ring->netdev)
2705                 return;
2706
2707         /* Single TC mode enable XPS */
2708         if (vsi->tc_config.numtc <= 1) {
2709                 if (!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2710                         netif_set_xps_queue(ring->netdev,
2711                                             &ring->q_vector->affinity_mask,
2712                                             ring->queue_index);
2713         } else if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
2714                 /* Disable XPS to allow selection based on TC */
2715                 bitmap_zero(cpumask_bits(mask), nr_cpumask_bits);
2716                 netif_set_xps_queue(ring->netdev, mask, ring->queue_index);
2717                 free_cpumask_var(mask);
2718         }
2719 }
2720
2721 /**
2722  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2723  * @ring: The Tx ring to configure
2724  *
2725  * Configure the Tx descriptor ring in the HMC context.
2726  **/
2727 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2728 {
2729         struct i40e_vsi *vsi = ring->vsi;
2730         u16 pf_q = vsi->base_queue + ring->queue_index;
2731         struct i40e_hw *hw = &vsi->back->hw;
2732         struct i40e_hmc_obj_txq tx_ctx;
2733         i40e_status err = 0;
2734         u32 qtx_ctl = 0;
2735
2736         /* some ATR related tx ring init */
2737         if (vsi->back->flags & I40E_FLAG_FD_ATR_ENABLED) {
2738                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2739                 ring->atr_count = 0;
2740         } else {
2741                 ring->atr_sample_rate = 0;
2742         }
2743
2744         /* configure XPS */
2745         i40e_config_xps_tx_ring(ring);
2746
2747         /* clear the context structure first */
2748         memset(&tx_ctx, 0, sizeof(tx_ctx));
2749
2750         tx_ctx.new_context = 1;
2751         tx_ctx.base = (ring->dma / 128);
2752         tx_ctx.qlen = ring->count;
2753         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FD_SB_ENABLED |
2754                                                I40E_FLAG_FD_ATR_ENABLED));
2755 #ifdef I40E_FCOE
2756         tx_ctx.fc_ena = (vsi->type == I40E_VSI_FCOE);
2757 #endif
2758         tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP);
2759         /* FDIR VSI tx ring can still use RS bit and writebacks */
2760         if (vsi->type != I40E_VSI_FDIR)
2761                 tx_ctx.head_wb_ena = 1;
2762         tx_ctx.head_wb_addr = ring->dma +
2763                               (ring->count * sizeof(struct i40e_tx_desc));
2764
2765         /* As part of VSI creation/update, FW allocates certain
2766          * Tx arbitration queue sets for each TC enabled for
2767          * the VSI. The FW returns the handles to these queue
2768          * sets as part of the response buffer to Add VSI,
2769          * Update VSI, etc. AQ commands. It is expected that
2770          * these queue set handles be associated with the Tx
2771          * queues by the driver as part of the TX queue context
2772          * initialization. This has to be done regardless of
2773          * DCB as by default everything is mapped to TC0.
2774          */
2775         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2776         tx_ctx.rdylist_act = 0;
2777
2778         /* clear the context in the HMC */
2779         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2780         if (err) {
2781                 dev_info(&vsi->back->pdev->dev,
2782                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2783                          ring->queue_index, pf_q, err);
2784                 return -ENOMEM;
2785         }
2786
2787         /* set the context in the HMC */
2788         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2789         if (err) {
2790                 dev_info(&vsi->back->pdev->dev,
2791                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2792                          ring->queue_index, pf_q, err);
2793                 return -ENOMEM;
2794         }
2795
2796         /* Now associate this queue with this PCI function */
2797         if (vsi->type == I40E_VSI_VMDQ2) {
2798                 qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
2799                 qtx_ctl |= ((vsi->id) << I40E_QTX_CTL_VFVM_INDX_SHIFT) &
2800                            I40E_QTX_CTL_VFVM_INDX_MASK;
2801         } else {
2802                 qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2803         }
2804
2805         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
2806                     I40E_QTX_CTL_PF_INDX_MASK);
2807         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2808         i40e_flush(hw);
2809
2810         /* cache tail off for easier writes later */
2811         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2812
2813         return 0;
2814 }
2815
2816 /**
2817  * i40e_configure_rx_ring - Configure a receive ring context
2818  * @ring: The Rx ring to configure
2819  *
2820  * Configure the Rx descriptor ring in the HMC context.
2821  **/
2822 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2823 {
2824         struct i40e_vsi *vsi = ring->vsi;
2825         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2826         u16 pf_q = vsi->base_queue + ring->queue_index;
2827         struct i40e_hw *hw = &vsi->back->hw;
2828         struct i40e_hmc_obj_rxq rx_ctx;
2829         i40e_status err = 0;
2830
2831         ring->state = 0;
2832
2833         /* clear the context structure first */
2834         memset(&rx_ctx, 0, sizeof(rx_ctx));
2835
2836         ring->rx_buf_len = vsi->rx_buf_len;
2837         ring->rx_hdr_len = vsi->rx_hdr_len;
2838
2839         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2840         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2841
2842         rx_ctx.base = (ring->dma / 128);
2843         rx_ctx.qlen = ring->count;
2844
2845         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2846                 set_ring_16byte_desc_enabled(ring);
2847                 rx_ctx.dsize = 0;
2848         } else {
2849                 rx_ctx.dsize = 1;
2850         }
2851
2852         rx_ctx.dtype = vsi->dtype;
2853         if (vsi->dtype) {
2854                 set_ring_ps_enabled(ring);
2855                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2856                                   I40E_RX_SPLIT_IP      |
2857                                   I40E_RX_SPLIT_TCP_UDP |
2858                                   I40E_RX_SPLIT_SCTP;
2859         } else {
2860                 rx_ctx.hsplit_0 = 0;
2861         }
2862
2863         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2864                                   (chain_len * ring->rx_buf_len));
2865         if (hw->revision_id == 0)
2866                 rx_ctx.lrxqthresh = 0;
2867         else
2868                 rx_ctx.lrxqthresh = 2;
2869         rx_ctx.crcstrip = 1;
2870         rx_ctx.l2tsel = 1;
2871         /* this controls whether VLAN is stripped from inner headers */
2872         rx_ctx.showiv = 0;
2873 #ifdef I40E_FCOE
2874         rx_ctx.fc_ena = (vsi->type == I40E_VSI_FCOE);
2875 #endif
2876         /* set the prefena field to 1 because the manual says to */
2877         rx_ctx.prefena = 1;
2878
2879         /* clear the context in the HMC */
2880         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2881         if (err) {
2882                 dev_info(&vsi->back->pdev->dev,
2883                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2884                          ring->queue_index, pf_q, err);
2885                 return -ENOMEM;
2886         }
2887
2888         /* set the context in the HMC */
2889         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2890         if (err) {
2891                 dev_info(&vsi->back->pdev->dev,
2892                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2893                          ring->queue_index, pf_q, err);
2894                 return -ENOMEM;
2895         }
2896
2897         /* cache tail for quicker writes, and clear the reg before use */
2898         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2899         writel(0, ring->tail);
2900
2901         if (ring_is_ps_enabled(ring)) {
2902                 i40e_alloc_rx_headers(ring);
2903                 i40e_alloc_rx_buffers_ps(ring, I40E_DESC_UNUSED(ring));
2904         } else {
2905                 i40e_alloc_rx_buffers_1buf(ring, I40E_DESC_UNUSED(ring));
2906         }
2907
2908         return 0;
2909 }
2910
2911 /**
2912  * i40e_vsi_configure_tx - Configure the VSI for Tx
2913  * @vsi: VSI structure describing this set of rings and resources
2914  *
2915  * Configure the Tx VSI for operation.
2916  **/
2917 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2918 {
2919         int err = 0;
2920         u16 i;
2921
2922         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2923                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2924
2925         return err;
2926 }
2927
2928 /**
2929  * i40e_vsi_configure_rx - Configure the VSI for Rx
2930  * @vsi: the VSI being configured
2931  *
2932  * Configure the Rx VSI for operation.
2933  **/
2934 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2935 {
2936         int err = 0;
2937         u16 i;
2938
2939         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2940                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2941                                + ETH_FCS_LEN + VLAN_HLEN;
2942         else
2943                 vsi->max_frame = I40E_RXBUFFER_2048;
2944
2945         /* figure out correct receive buffer length */
2946         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2947                                     I40E_FLAG_RX_PS_ENABLED)) {
2948         case I40E_FLAG_RX_1BUF_ENABLED:
2949                 vsi->rx_hdr_len = 0;
2950                 vsi->rx_buf_len = vsi->max_frame;
2951                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2952                 break;
2953         case I40E_FLAG_RX_PS_ENABLED:
2954                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2955                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2956                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2957                 break;
2958         default:
2959                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2960                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2961                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2962                 break;
2963         }
2964
2965 #ifdef I40E_FCOE
2966         /* setup rx buffer for FCoE */
2967         if ((vsi->type == I40E_VSI_FCOE) &&
2968             (vsi->back->flags & I40E_FLAG_FCOE_ENABLED)) {
2969                 vsi->rx_hdr_len = 0;
2970                 vsi->rx_buf_len = I40E_RXBUFFER_3072;
2971                 vsi->max_frame = I40E_RXBUFFER_3072;
2972                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2973         }
2974
2975 #endif /* I40E_FCOE */
2976         /* round up for the chip's needs */
2977         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2978                                 BIT_ULL(I40E_RXQ_CTX_HBUFF_SHIFT));
2979         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2980                                 BIT_ULL(I40E_RXQ_CTX_DBUFF_SHIFT));
2981
2982         /* set up individual rings */
2983         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2984                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2985
2986         return err;
2987 }
2988
2989 /**
2990  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2991  * @vsi: ptr to the VSI
2992  **/
2993 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2994 {
2995         struct i40e_ring *tx_ring, *rx_ring;
2996         u16 qoffset, qcount;
2997         int i, n;
2998
2999         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
3000                 /* Reset the TC information */
3001                 for (i = 0; i < vsi->num_queue_pairs; i++) {
3002                         rx_ring = vsi->rx_rings[i];
3003                         tx_ring = vsi->tx_rings[i];
3004                         rx_ring->dcb_tc = 0;
3005                         tx_ring->dcb_tc = 0;
3006                 }
3007         }
3008
3009         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
3010                 if (!(vsi->tc_config.enabled_tc & BIT_ULL(n)))
3011                         continue;
3012
3013                 qoffset = vsi->tc_config.tc_info[n].qoffset;
3014                 qcount = vsi->tc_config.tc_info[n].qcount;
3015                 for (i = qoffset; i < (qoffset + qcount); i++) {
3016                         rx_ring = vsi->rx_rings[i];
3017                         tx_ring = vsi->tx_rings[i];
3018                         rx_ring->dcb_tc = n;
3019                         tx_ring->dcb_tc = n;
3020                 }
3021         }
3022 }
3023
3024 /**
3025  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
3026  * @vsi: ptr to the VSI
3027  **/
3028 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
3029 {
3030         if (vsi->netdev)
3031                 i40e_set_rx_mode(vsi->netdev);
3032 }
3033
3034 /**
3035  * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
3036  * @vsi: Pointer to the targeted VSI
3037  *
3038  * This function replays the hlist on the hw where all the SB Flow Director
3039  * filters were saved.
3040  **/
3041 static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
3042 {
3043         struct i40e_fdir_filter *filter;
3044         struct i40e_pf *pf = vsi->back;
3045         struct hlist_node *node;
3046
3047         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
3048                 return;
3049
3050         hlist_for_each_entry_safe(filter, node,
3051                                   &pf->fdir_filter_list, fdir_node) {
3052                 i40e_add_del_fdir(vsi, filter, true);
3053         }
3054 }
3055
3056 /**
3057  * i40e_vsi_configure - Set up the VSI for action
3058  * @vsi: the VSI being configured
3059  **/
3060 static int i40e_vsi_configure(struct i40e_vsi *vsi)
3061 {
3062         int err;
3063
3064         i40e_set_vsi_rx_mode(vsi);
3065         i40e_restore_vlan(vsi);
3066         i40e_vsi_config_dcb_rings(vsi);
3067         err = i40e_vsi_configure_tx(vsi);
3068         if (!err)
3069                 err = i40e_vsi_configure_rx(vsi);
3070
3071         return err;
3072 }
3073
3074 /**
3075  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
3076  * @vsi: the VSI being configured
3077  **/
3078 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
3079 {
3080         struct i40e_pf *pf = vsi->back;
3081         struct i40e_hw *hw = &pf->hw;
3082         u16 vector;
3083         int i, q;
3084         u32 qp;
3085
3086         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
3087          * and PFINT_LNKLSTn registers, e.g.:
3088          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
3089          */
3090         qp = vsi->base_queue;
3091         vector = vsi->base_vector;
3092         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
3093                 struct i40e_q_vector *q_vector = vsi->q_vectors[i];
3094
3095                 q_vector->itr_countdown = ITR_COUNTDOWN_START;
3096                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
3097                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
3098                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
3099                      q_vector->rx.itr);
3100                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
3101                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
3102                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
3103                      q_vector->tx.itr);
3104                 wr32(hw, I40E_PFINT_RATEN(vector - 1),
3105                      INTRL_USEC_TO_REG(vsi->int_rate_limit));
3106
3107                 /* Linked list for the queuepairs assigned to this vector */
3108                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
3109                 for (q = 0; q < q_vector->num_ringpairs; q++) {
3110                         u32 val;
3111
3112                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
3113                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
3114                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
3115                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
3116                               (I40E_QUEUE_TYPE_TX
3117                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
3118
3119                         wr32(hw, I40E_QINT_RQCTL(qp), val);
3120
3121                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
3122                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
3123                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
3124                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
3125                               (I40E_QUEUE_TYPE_RX
3126                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
3127
3128                         /* Terminate the linked list */
3129                         if (q == (q_vector->num_ringpairs - 1))
3130                                 val |= (I40E_QUEUE_END_OF_LIST
3131                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
3132
3133                         wr32(hw, I40E_QINT_TQCTL(qp), val);
3134                         qp++;
3135                 }
3136         }
3137
3138         i40e_flush(hw);
3139 }
3140
3141 /**
3142  * i40e_enable_misc_int_causes - enable the non-queue interrupts
3143  * @hw: ptr to the hardware info
3144  **/
3145 static void i40e_enable_misc_int_causes(struct i40e_pf *pf)
3146 {
3147         struct i40e_hw *hw = &pf->hw;
3148         u32 val;
3149
3150         /* clear things first */
3151         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
3152         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
3153
3154         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
3155               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
3156               I40E_PFINT_ICR0_ENA_GRST_MASK          |
3157               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
3158               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
3159               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
3160               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
3161               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
3162
3163         if (pf->flags & I40E_FLAG_IWARP_ENABLED)
3164                 val |= I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3165
3166         if (pf->flags & I40E_FLAG_PTP)
3167                 val |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
3168
3169         wr32(hw, I40E_PFINT_ICR0_ENA, val);
3170
3171         /* SW_ITR_IDX = 0, but don't change INTENA */
3172         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
3173                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
3174
3175         /* OTHER_ITR_IDX = 0 */
3176         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
3177 }
3178
3179 /**
3180  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
3181  * @vsi: the VSI being configured
3182  **/
3183 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
3184 {
3185         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
3186         struct i40e_pf *pf = vsi->back;
3187         struct i40e_hw *hw = &pf->hw;
3188         u32 val;
3189
3190         /* set the ITR configuration */
3191         q_vector->itr_countdown = ITR_COUNTDOWN_START;
3192         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
3193         q_vector->rx.latency_range = I40E_LOW_LATENCY;
3194         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
3195         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
3196         q_vector->tx.latency_range = I40E_LOW_LATENCY;
3197         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
3198
3199         i40e_enable_misc_int_causes(pf);
3200
3201         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
3202         wr32(hw, I40E_PFINT_LNKLST0, 0);
3203
3204         /* Associate the queue pair to the vector and enable the queue int */
3205         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
3206               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
3207               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
3208
3209         wr32(hw, I40E_QINT_RQCTL(0), val);
3210
3211         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
3212               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
3213               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
3214
3215         wr32(hw, I40E_QINT_TQCTL(0), val);
3216         i40e_flush(hw);
3217 }
3218
3219 /**
3220  * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
3221  * @pf: board private structure
3222  **/
3223 void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
3224 {
3225         struct i40e_hw *hw = &pf->hw;
3226
3227         wr32(hw, I40E_PFINT_DYN_CTL0,
3228              I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
3229         i40e_flush(hw);
3230 }
3231
3232 /**
3233  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
3234  * @pf: board private structure
3235  **/
3236 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
3237 {
3238         struct i40e_hw *hw = &pf->hw;
3239         u32 val;
3240
3241         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
3242               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
3243               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
3244
3245         wr32(hw, I40E_PFINT_DYN_CTL0, val);
3246         i40e_flush(hw);
3247 }
3248
3249 /**
3250  * i40e_irq_dynamic_disable - Disable default interrupt generation settings
3251  * @vsi: pointer to a vsi
3252  * @vector: disable a particular Hw Interrupt vector
3253  **/
3254 void i40e_irq_dynamic_disable(struct i40e_vsi *vsi, int vector)
3255 {
3256         struct i40e_pf *pf = vsi->back;
3257         struct i40e_hw *hw = &pf->hw;
3258         u32 val;
3259
3260         val = I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT;
3261         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
3262         i40e_flush(hw);
3263 }
3264
3265 /**
3266  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
3267  * @irq: interrupt number
3268  * @data: pointer to a q_vector
3269  **/
3270 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
3271 {
3272         struct i40e_q_vector *q_vector = data;
3273
3274         if (!q_vector->tx.ring && !q_vector->rx.ring)
3275                 return IRQ_HANDLED;
3276
3277         napi_schedule_irqoff(&q_vector->napi);
3278
3279         return IRQ_HANDLED;
3280 }
3281
3282 /**
3283  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
3284  * @vsi: the VSI being configured
3285  * @basename: name for the vector
3286  *
3287  * Allocates MSI-X vectors and requests interrupts from the kernel.
3288  **/
3289 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
3290 {
3291         int q_vectors = vsi->num_q_vectors;
3292         struct i40e_pf *pf = vsi->back;
3293         int base = vsi->base_vector;
3294         int rx_int_idx = 0;
3295         int tx_int_idx = 0;
3296         int vector, err;
3297
3298         for (vector = 0; vector < q_vectors; vector++) {
3299                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
3300
3301                 if (q_vector->tx.ring && q_vector->rx.ring) {
3302                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3303                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
3304                         tx_int_idx++;
3305                 } else if (q_vector->rx.ring) {
3306                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3307                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
3308                 } else if (q_vector->tx.ring) {
3309                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3310                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
3311                 } else {
3312                         /* skip this unused q_vector */
3313                         continue;
3314                 }
3315                 err = request_irq(pf->msix_entries[base + vector].vector,
3316                                   vsi->irq_handler,
3317                                   0,
3318                                   q_vector->name,
3319                                   q_vector);
3320                 if (err) {
3321                         dev_info(&pf->pdev->dev,
3322                                  "MSIX request_irq failed, error: %d\n", err);
3323                         goto free_queue_irqs;
3324                 }
3325                 /* assign the mask for this irq */
3326                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
3327                                       &q_vector->affinity_mask);
3328         }
3329
3330         vsi->irqs_ready = true;
3331         return 0;
3332
3333 free_queue_irqs:
3334         while (vector) {
3335                 vector--;
3336                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
3337                                       NULL);
3338                 free_irq(pf->msix_entries[base + vector].vector,
3339                          &(vsi->q_vectors[vector]));
3340         }
3341         return err;
3342 }
3343
3344 /**
3345  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
3346  * @vsi: the VSI being un-configured
3347  **/
3348 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
3349 {
3350         struct i40e_pf *pf = vsi->back;
3351         struct i40e_hw *hw = &pf->hw;
3352         int base = vsi->base_vector;
3353         int i;
3354
3355         for (i = 0; i < vsi->num_queue_pairs; i++) {
3356                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
3357                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
3358         }
3359
3360         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3361                 for (i = vsi->base_vector;
3362                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
3363                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
3364
3365                 i40e_flush(hw);
3366                 for (i = 0; i < vsi->num_q_vectors; i++)
3367                         synchronize_irq(pf->msix_entries[i + base].vector);
3368         } else {
3369                 /* Legacy and MSI mode - this stops all interrupt handling */
3370                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
3371                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
3372                 i40e_flush(hw);
3373                 synchronize_irq(pf->pdev->irq);
3374         }
3375 }
3376
3377 /**
3378  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
3379  * @vsi: the VSI being configured
3380  **/
3381 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
3382 {
3383         struct i40e_pf *pf = vsi->back;
3384         int i;
3385
3386         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3387                 for (i = 0; i < vsi->num_q_vectors; i++)
3388                         i40e_irq_dynamic_enable(vsi, i);
3389         } else {
3390                 i40e_irq_dynamic_enable_icr0(pf);
3391         }
3392
3393         i40e_flush(&pf->hw);
3394         return 0;
3395 }
3396
3397 /**
3398  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
3399  * @pf: board private structure
3400  **/
3401 static void i40e_stop_misc_vector(struct i40e_pf *pf)
3402 {
3403         /* Disable ICR 0 */
3404         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
3405         i40e_flush(&pf->hw);
3406 }
3407
3408 /**
3409  * i40e_intr - MSI/Legacy and non-queue interrupt handler
3410  * @irq: interrupt number
3411  * @data: pointer to a q_vector
3412  *
3413  * This is the handler used for all MSI/Legacy interrupts, and deals
3414  * with both queue and non-queue interrupts.  This is also used in
3415  * MSIX mode to handle the non-queue interrupts.
3416  **/
3417 static irqreturn_t i40e_intr(int irq, void *data)
3418 {
3419         struct i40e_pf *pf = (struct i40e_pf *)data;
3420         struct i40e_hw *hw = &pf->hw;
3421         irqreturn_t ret = IRQ_NONE;
3422         u32 icr0, icr0_remaining;
3423         u32 val, ena_mask;
3424
3425         icr0 = rd32(hw, I40E_PFINT_ICR0);
3426         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
3427
3428         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
3429         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
3430                 goto enable_intr;
3431
3432         /* if interrupt but no bits showing, must be SWINT */
3433         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
3434             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
3435                 pf->sw_int_count++;
3436
3437         if ((pf->flags & I40E_FLAG_IWARP_ENABLED) &&
3438             (ena_mask & I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK)) {
3439                 ena_mask &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3440                 icr0 &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3441                 dev_info(&pf->pdev->dev, "cleared PE_CRITERR\n");
3442         }
3443
3444         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
3445         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
3446                 struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
3447                 struct i40e_q_vector *q_vector = vsi->q_vectors[0];
3448
3449                 /* temporarily disable queue cause for NAPI processing */
3450                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
3451
3452                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
3453                 wr32(hw, I40E_QINT_RQCTL(0), qval);
3454
3455                 qval = rd32(hw, I40E_QINT_TQCTL(0));
3456                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
3457                 wr32(hw, I40E_QINT_TQCTL(0), qval);
3458
3459                 if (!test_bit(__I40E_DOWN, &pf->state))
3460                         napi_schedule_irqoff(&q_vector->napi);
3461         }
3462
3463         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
3464                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
3465                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
3466         }
3467
3468         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
3469                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
3470                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
3471         }
3472
3473         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
3474                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
3475                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
3476         }
3477
3478         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
3479                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
3480                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
3481                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
3482                 val = rd32(hw, I40E_GLGEN_RSTAT);
3483                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
3484                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
3485                 if (val == I40E_RESET_CORER) {
3486                         pf->corer_count++;
3487                 } else if (val == I40E_RESET_GLOBR) {
3488                         pf->globr_count++;
3489                 } else if (val == I40E_RESET_EMPR) {
3490                         pf->empr_count++;
3491                         set_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state);
3492                 }
3493         }
3494
3495         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
3496                 icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
3497                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
3498                 dev_info(&pf->pdev->dev, "HMC error info 0x%x, HMC error data 0x%x\n",
3499                          rd32(hw, I40E_PFHMC_ERRORINFO),
3500                          rd32(hw, I40E_PFHMC_ERRORDATA));
3501         }
3502
3503         if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
3504                 u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);
3505
3506                 if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) {
3507                         icr0 &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
3508                         i40e_ptp_tx_hwtstamp(pf);
3509                 }
3510         }
3511
3512         /* If a critical error is pending we have no choice but to reset the
3513          * device.
3514          * Report and mask out any remaining unexpected interrupts.
3515          */
3516         icr0_remaining = icr0 & ena_mask;
3517         if (icr0_remaining) {
3518                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
3519                          icr0_remaining);
3520                 if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
3521                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
3522                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK)) {
3523                         dev_info(&pf->pdev->dev, "device will be reset\n");
3524                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
3525                         i40e_service_event_schedule(pf);
3526                 }
3527                 ena_mask &= ~icr0_remaining;
3528         }
3529         ret = IRQ_HANDLED;
3530
3531 enable_intr:
3532         /* re-enable interrupt causes */
3533         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
3534         if (!test_bit(__I40E_DOWN, &pf->state)) {
3535                 i40e_service_event_schedule(pf);
3536                 i40e_irq_dynamic_enable_icr0(pf);
3537         }
3538
3539         return ret;
3540 }
3541
3542 /**
3543  * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
3544  * @tx_ring:  tx ring to clean
3545  * @budget:   how many cleans we're allowed
3546  *
3547  * Returns true if there's any budget left (e.g. the clean is finished)
3548  **/
3549 static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
3550 {
3551         struct i40e_vsi *vsi = tx_ring->vsi;
3552         u16 i = tx_ring->next_to_clean;
3553         struct i40e_tx_buffer *tx_buf;
3554         struct i40e_tx_desc *tx_desc;
3555
3556         tx_buf = &tx_ring->tx_bi[i];
3557         tx_desc = I40E_TX_DESC(tx_ring, i);
3558         i -= tx_ring->count;
3559
3560         do {
3561                 struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;
3562
3563                 /* if next_to_watch is not set then there is no work pending */
3564                 if (!eop_desc)
3565                         break;
3566
3567                 /* prevent any other reads prior to eop_desc */
3568                 read_barrier_depends();
3569
3570                 /* if the descriptor isn't done, no work yet to do */
3571                 if (!(eop_desc->cmd_type_offset_bsz &
3572                       cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
3573                         break;
3574
3575                 /* clear next_to_watch to prevent false hangs */
3576                 tx_buf->next_to_watch = NULL;
3577
3578                 tx_desc->buffer_addr = 0;
3579                 tx_desc->cmd_type_offset_bsz = 0;
3580                 /* move past filter desc */
3581                 tx_buf++;
3582                 tx_desc++;
3583                 i++;
3584                 if (unlikely(!i)) {
3585                         i -= tx_ring->count;
3586                         tx_buf = tx_ring->tx_bi;
3587                         tx_desc = I40E_TX_DESC(tx_ring, 0);
3588                 }
3589                 /* unmap skb header data */
3590                 dma_unmap_single(tx_ring->dev,
3591                                  dma_unmap_addr(tx_buf, dma),
3592                                  dma_unmap_len(tx_buf, len),
3593                                  DMA_TO_DEVICE);
3594                 if (tx_buf->tx_flags & I40E_TX_FLAGS_FD_SB)
3595                         kfree(tx_buf->raw_buf);
3596
3597                 tx_buf->raw_buf = NULL;
3598                 tx_buf->tx_flags = 0;
3599                 tx_buf->next_to_watch = NULL;
3600                 dma_unmap_len_set(tx_buf, len, 0);
3601                 tx_desc->buffer_addr = 0;
3602                 tx_desc->cmd_type_offset_bsz = 0;
3603
3604                 /* move us past the eop_desc for start of next FD desc */
3605                 tx_buf++;
3606                 tx_desc++;
3607                 i++;
3608                 if (unlikely(!i)) {
3609                         i -= tx_ring->count;
3610                         tx_buf = tx_ring->tx_bi;
3611                         tx_desc = I40E_TX_DESC(tx_ring, 0);
3612                 }
3613
3614                 /* update budget accounting */
3615                 budget--;
3616         } while (likely(budget));
3617
3618         i += tx_ring->count;
3619         tx_ring->next_to_clean = i;
3620
3621         if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED)
3622                 i40e_irq_dynamic_enable(vsi, tx_ring->q_vector->v_idx);
3623
3624         return budget > 0;
3625 }
3626
3627 /**
3628  * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
3629  * @irq: interrupt number
3630  * @data: pointer to a q_vector
3631  **/
3632 static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
3633 {
3634         struct i40e_q_vector *q_vector = data;
3635         struct i40e_vsi *vsi;
3636
3637         if (!q_vector->tx.ring)
3638                 return IRQ_HANDLED;
3639
3640         vsi = q_vector->tx.ring->vsi;
3641         i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);
3642
3643         return IRQ_HANDLED;
3644 }
3645
3646 /**
3647  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
3648  * @vsi: the VSI being configured
3649  * @v_idx: vector index
3650  * @qp_idx: queue pair index
3651  **/
3652 static void i40e_map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
3653 {
3654         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3655         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
3656         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
3657
3658         tx_ring->q_vector = q_vector;
3659         tx_ring->next = q_vector->tx.ring;
3660         q_vector->tx.ring = tx_ring;
3661         q_vector->tx.count++;
3662
3663         rx_ring->q_vector = q_vector;
3664         rx_ring->next = q_vector->rx.ring;
3665         q_vector->rx.ring = rx_ring;
3666         q_vector->rx.count++;
3667 }
3668
3669 /**
3670  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
3671  * @vsi: the VSI being configured
3672  *
3673  * This function maps descriptor rings to the queue-specific vectors
3674  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
3675  * one vector per queue pair, but on a constrained vector budget, we
3676  * group the queue pairs as "efficiently" as possible.
3677  **/
3678 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
3679 {
3680         int qp_remaining = vsi->num_queue_pairs;
3681         int q_vectors = vsi->num_q_vectors;
3682         int num_ringpairs;
3683         int v_start = 0;
3684         int qp_idx = 0;
3685
3686         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
3687          * group them so there are multiple queues per vector.
3688          * It is also important to go through all the vectors available to be
3689          * sure that if we don't use all the vectors, that the remaining vectors
3690          * are cleared. This is especially important when decreasing the
3691          * number of queues in use.
3692          */
3693         for (; v_start < q_vectors; v_start++) {
3694                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
3695
3696                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
3697
3698                 q_vector->num_ringpairs = num_ringpairs;
3699
3700                 q_vector->rx.count = 0;
3701                 q_vector->tx.count = 0;
3702                 q_vector->rx.ring = NULL;
3703                 q_vector->tx.ring = NULL;
3704
3705                 while (num_ringpairs--) {
3706                         i40e_map_vector_to_qp(vsi, v_start, qp_idx);
3707                         qp_idx++;
3708                         qp_remaining--;
3709                 }
3710         }
3711 }
3712
3713 /**
3714  * i40e_vsi_request_irq - Request IRQ from the OS
3715  * @vsi: the VSI being configured
3716  * @basename: name for the vector
3717  **/
3718 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
3719 {
3720         struct i40e_pf *pf = vsi->back;
3721         int err;
3722
3723         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3724                 err = i40e_vsi_request_irq_msix(vsi, basename);
3725         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
3726                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
3727                                   pf->int_name, pf);
3728         else
3729                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
3730                                   pf->int_name, pf);
3731
3732         if (err)
3733                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
3734
3735         return err;
3736 }
3737
3738 #ifdef CONFIG_NET_POLL_CONTROLLER
3739 /**
3740  * i40e_netpoll - A Polling 'interrupt'handler
3741  * @netdev: network interface device structure
3742  *
3743  * This is used by netconsole to send skbs without having to re-enable
3744  * interrupts.  It's not called while the normal interrupt routine is executing.
3745  **/
3746 #ifdef I40E_FCOE
3747 void i40e_netpoll(struct net_device *netdev)
3748 #else
3749 static void i40e_netpoll(struct net_device *netdev)
3750 #endif
3751 {
3752         struct i40e_netdev_priv *np = netdev_priv(netdev);
3753         struct i40e_vsi *vsi = np->vsi;
3754         struct i40e_pf *pf = vsi->back;
3755         int i;
3756
3757         /* if interface is down do nothing */
3758         if (test_bit(__I40E_DOWN, &vsi->state))
3759                 return;
3760
3761         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3762                 for (i = 0; i < vsi->num_q_vectors; i++)
3763                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
3764         } else {
3765                 i40e_intr(pf->pdev->irq, netdev);
3766         }
3767 }
3768 #endif
3769
3770 /**
3771  * i40e_pf_txq_wait - Wait for a PF's Tx queue to be enabled or disabled
3772  * @pf: the PF being configured
3773  * @pf_q: the PF queue
3774  * @enable: enable or disable state of the queue
3775  *
3776  * This routine will wait for the given Tx queue of the PF to reach the
3777  * enabled or disabled state.
3778  * Returns -ETIMEDOUT in case of failing to reach the requested state after
3779  * multiple retries; else will return 0 in case of success.
3780  **/
3781 static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
3782 {
3783         int i;
3784         u32 tx_reg;
3785
3786         for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
3787                 tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
3788                 if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3789                         break;
3790
3791                 usleep_range(10, 20);
3792         }
3793         if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
3794                 return -ETIMEDOUT;
3795
3796         return 0;
3797 }
3798
3799 /**
3800  * i40e_vsi_control_tx - Start or stop a VSI's rings
3801  * @vsi: the VSI being configured
3802  * @enable: start or stop the rings
3803  **/
3804 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
3805 {
3806         struct i40e_pf *pf = vsi->back;
3807         struct i40e_hw *hw = &pf->hw;
3808         int i, j, pf_q, ret = 0;
3809         u32 tx_reg;
3810
3811         pf_q = vsi->base_queue;
3812         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3813
3814                 /* warn the TX unit of coming changes */
3815                 i40e_pre_tx_queue_cfg(&pf->hw, pf_q, enable);
3816                 if (!enable)
3817                         usleep_range(10, 20);
3818
3819                 for (j = 0; j < 50; j++) {
3820                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3821                         if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
3822                             ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
3823                                 break;
3824                         usleep_range(1000, 2000);
3825                 }
3826                 /* Skip if the queue is already in the requested state */
3827                 if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3828                         continue;
3829
3830                 /* turn on/off the queue */
3831                 if (enable) {
3832                         wr32(hw, I40E_QTX_HEAD(pf_q), 0);
3833                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
3834                 } else {
3835                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
3836                 }
3837
3838                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
3839                 /* No waiting for the Tx queue to disable */
3840                 if (!enable && test_bit(__I40E_PORT_TX_SUSPENDED, &pf->state))
3841                         continue;
3842
3843                 /* wait for the change to finish */
3844                 ret = i40e_pf_txq_wait(pf, pf_q, enable);
3845                 if (ret) {
3846                         dev_info(&pf->pdev->dev,
3847                                  "VSI seid %d Tx ring %d %sable timeout\n",
3848                                  vsi->seid, pf_q, (enable ? "en" : "dis"));
3849                         break;
3850                 }
3851         }
3852
3853         if (hw->revision_id == 0)
3854                 mdelay(50);
3855         return ret;
3856 }
3857
3858 /**
3859  * i40e_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
3860  * @pf: the PF being configured
3861  * @pf_q: the PF queue
3862  * @enable: enable or disable state of the queue
3863  *
3864  * This routine will wait for the given Rx queue of the PF to reach the
3865  * enabled or disabled state.
3866  * Returns -ETIMEDOUT in case of failing to reach the requested state after
3867  * multiple retries; else will return 0 in case of success.
3868  **/
3869 static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
3870 {
3871         int i;
3872         u32 rx_reg;
3873
3874         for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
3875                 rx_reg = rd32(&pf->hw, I40E_QRX_ENA(pf_q));
3876                 if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3877                         break;
3878
3879                 usleep_range(10, 20);
3880         }
3881         if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
3882                 return -ETIMEDOUT;
3883
3884         return 0;
3885 }
3886
3887 /**
3888  * i40e_vsi_control_rx - Start or stop a VSI's rings
3889  * @vsi: the VSI being configured
3890  * @enable: start or stop the rings
3891  **/
3892 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3893 {
3894         struct i40e_pf *pf = vsi->back;
3895         struct i40e_hw *hw = &pf->hw;
3896         int i, j, pf_q, ret = 0;
3897         u32 rx_reg;
3898
3899         pf_q = vsi->base_queue;
3900         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3901                 for (j = 0; j < 50; j++) {
3902                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3903                         if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
3904                             ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
3905                                 break;
3906                         usleep_range(1000, 2000);
3907                 }
3908
3909                 /* Skip if the queue is already in the requested state */
3910                 if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3911                         continue;
3912
3913                 /* turn on/off the queue */
3914                 if (enable)
3915                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
3916                 else
3917                         rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;
3918                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3919
3920                 /* wait for the change to finish */
3921                 ret = i40e_pf_rxq_wait(pf, pf_q, enable);
3922                 if (ret) {
3923                         dev_info(&pf->pdev->dev,
3924                                  "VSI seid %d Rx ring %d %sable timeout\n",
3925                                  vsi->seid, pf_q, (enable ? "en" : "dis"));
3926                         break;
3927                 }
3928         }
3929
3930         return ret;
3931 }
3932
3933 /**
3934  * i40e_vsi_control_rings - Start or stop a VSI's rings
3935  * @vsi: the VSI being configured
3936  * @enable: start or stop the rings
3937  **/
3938 int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3939 {
3940         int ret = 0;
3941
3942         /* do rx first for enable and last for disable */
3943         if (request) {
3944                 ret = i40e_vsi_control_rx(vsi, request);
3945                 if (ret)
3946                         return ret;
3947                 ret = i40e_vsi_control_tx(vsi, request);
3948         } else {
3949                 /* Ignore return value, we need to shutdown whatever we can */
3950                 i40e_vsi_control_tx(vsi, request);
3951                 i40e_vsi_control_rx(vsi, request);
3952         }
3953
3954         return ret;
3955 }
3956
3957 /**
3958  * i40e_vsi_free_irq - Free the irq association with the OS
3959  * @vsi: the VSI being configured
3960  **/
3961 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3962 {
3963         struct i40e_pf *pf = vsi->back;
3964         struct i40e_hw *hw = &pf->hw;
3965         int base = vsi->base_vector;
3966         u32 val, qp;
3967         int i;
3968
3969         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3970                 if (!vsi->q_vectors)
3971                         return;
3972
3973                 if (!vsi->irqs_ready)
3974                         return;
3975
3976                 vsi->irqs_ready = false;
3977                 for (i = 0; i < vsi->num_q_vectors; i++) {
3978                         u16 vector = i + base;
3979
3980                         /* free only the irqs that were actually requested */
3981                         if (!vsi->q_vectors[i] ||
3982                             !vsi->q_vectors[i]->num_ringpairs)
3983                                 continue;
3984
3985                         /* clear the affinity_mask in the IRQ descriptor */
3986                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3987                                               NULL);
3988                         free_irq(pf->msix_entries[vector].vector,
3989                                  vsi->q_vectors[i]);
3990
3991                         /* Tear down the interrupt queue link list
3992                          *
3993                          * We know that they come in pairs and always
3994                          * the Rx first, then the Tx.  To clear the
3995                          * link list, stick the EOL value into the
3996                          * next_q field of the registers.
3997                          */
3998                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3999                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
4000                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4001                         val |= I40E_QUEUE_END_OF_LIST
4002                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4003                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
4004
4005                         while (qp != I40E_QUEUE_END_OF_LIST) {
4006                                 u32 next;
4007
4008                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
4009
4010                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
4011                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
4012                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
4013                                          I40E_QINT_RQCTL_INTEVENT_MASK);
4014
4015                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
4016                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
4017
4018                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
4019
4020                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
4021
4022                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
4023                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
4024
4025                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
4026                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
4027                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
4028                                          I40E_QINT_TQCTL_INTEVENT_MASK);
4029
4030                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
4031                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
4032
4033                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
4034                                 qp = next;
4035                         }
4036                 }
4037         } else {
4038                 free_irq(pf->pdev->irq, pf);
4039
4040                 val = rd32(hw, I40E_PFINT_LNKLST0);
4041                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
4042                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4043                 val |= I40E_QUEUE_END_OF_LIST
4044                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
4045                 wr32(hw, I40E_PFINT_LNKLST0, val);
4046
4047                 val = rd32(hw, I40E_QINT_RQCTL(qp));
4048                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
4049                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
4050                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
4051                          I40E_QINT_RQCTL_INTEVENT_MASK);
4052
4053                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
4054                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
4055
4056                 wr32(hw, I40E_QINT_RQCTL(qp), val);
4057
4058                 val = rd32(hw, I40E_QINT_TQCTL(qp));
4059
4060                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
4061                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
4062                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
4063                          I40E_QINT_TQCTL_INTEVENT_MASK);
4064
4065                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
4066                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
4067
4068                 wr32(hw, I40E_QINT_TQCTL(qp), val);
4069         }
4070 }
4071
4072 /**
4073  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
4074  * @vsi: the VSI being configured
4075  * @v_idx: Index of vector to be freed
4076  *
4077  * This function frees the memory allocated to the q_vector.  In addition if
4078  * NAPI is enabled it will delete any references to the NAPI struct prior
4079  * to freeing the q_vector.
4080  **/
4081 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
4082 {
4083         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
4084         struct i40e_ring *ring;
4085
4086         if (!q_vector)
4087                 return;
4088
4089         /* disassociate q_vector from rings */
4090         i40e_for_each_ring(ring, q_vector->tx)
4091                 ring->q_vector = NULL;
4092
4093         i40e_for_each_ring(ring, q_vector->rx)
4094                 ring->q_vector = NULL;
4095
4096         /* only VSI w/ an associated netdev is set up w/ NAPI */
4097         if (vsi->netdev)
4098                 netif_napi_del(&q_vector->napi);
4099
4100         vsi->q_vectors[v_idx] = NULL;
4101
4102         kfree_rcu(q_vector, rcu);
4103 }
4104
4105 /**
4106  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
4107  * @vsi: the VSI being un-configured
4108  *
4109  * This frees the memory allocated to the q_vectors and
4110  * deletes references to the NAPI struct.
4111  **/
4112 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
4113 {
4114         int v_idx;
4115
4116         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
4117                 i40e_free_q_vector(vsi, v_idx);
4118 }
4119
4120 /**
4121  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
4122  * @pf: board private structure
4123  **/
4124 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
4125 {
4126         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
4127         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
4128                 pci_disable_msix(pf->pdev);
4129                 kfree(pf->msix_entries);
4130                 pf->msix_entries = NULL;
4131                 kfree(pf->irq_pile);
4132                 pf->irq_pile = NULL;
4133         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
4134                 pci_disable_msi(pf->pdev);
4135         }
4136         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
4137 }
4138
4139 /**
4140  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
4141  * @pf: board private structure
4142  *
4143  * We go through and clear interrupt specific resources and reset the structure
4144  * to pre-load conditions
4145  **/
4146 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
4147 {
4148         int i;
4149
4150         i40e_stop_misc_vector(pf);
4151         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
4152                 synchronize_irq(pf->msix_entries[0].vector);
4153                 free_irq(pf->msix_entries[0].vector, pf);
4154         }
4155
4156         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
4157         for (i = 0; i < pf->num_alloc_vsi; i++)
4158                 if (pf->vsi[i])
4159                         i40e_vsi_free_q_vectors(pf->vsi[i]);
4160         i40e_reset_interrupt_capability(pf);
4161 }
4162
4163 /**
4164  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
4165  * @vsi: the VSI being configured
4166  **/
4167 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
4168 {
4169         int q_idx;
4170
4171         if (!vsi->netdev)
4172                 return;
4173
4174         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
4175                 napi_enable(&vsi->q_vectors[q_idx]->napi);
4176 }
4177
4178 /**
4179  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
4180  * @vsi: the VSI being configured
4181  **/
4182 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
4183 {
4184         int q_idx;
4185
4186         if (!vsi->netdev)
4187                 return;
4188
4189         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
4190                 napi_disable(&vsi->q_vectors[q_idx]->napi);
4191 }
4192
4193 /**
4194  * i40e_vsi_close - Shut down a VSI
4195  * @vsi: the vsi to be quelled
4196  **/
4197 static void i40e_vsi_close(struct i40e_vsi *vsi)
4198 {
4199         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
4200                 i40e_down(vsi);
4201         i40e_vsi_free_irq(vsi);
4202         i40e_vsi_free_tx_resources(vsi);
4203         i40e_vsi_free_rx_resources(vsi);
4204         vsi->current_netdev_flags = 0;
4205 }
4206
4207 /**
4208  * i40e_quiesce_vsi - Pause a given VSI
4209  * @vsi: the VSI being paused
4210  **/
4211 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
4212 {
4213         if (test_bit(__I40E_DOWN, &vsi->state))
4214                 return;
4215
4216         /* No need to disable FCoE VSI when Tx suspended */
4217         if ((test_bit(__I40E_PORT_TX_SUSPENDED, &vsi->back->state)) &&
4218             vsi->type == I40E_VSI_FCOE) {
4219                 dev_dbg(&vsi->back->pdev->dev,
4220                          "VSI seid %d skipping FCoE VSI disable\n", vsi->seid);
4221                 return;
4222         }
4223
4224         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
4225         if (vsi->netdev && netif_running(vsi->netdev))
4226                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
4227         else
4228                 i40e_vsi_close(vsi);
4229 }
4230
4231 /**
4232  * i40e_unquiesce_vsi - Resume a given VSI
4233  * @vsi: the VSI being resumed
4234  **/
4235 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
4236 {
4237         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
4238                 return;
4239
4240         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
4241         if (vsi->netdev && netif_running(vsi->netdev))
4242                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
4243         else
4244                 i40e_vsi_open(vsi);   /* this clears the DOWN bit */
4245 }
4246
4247 /**
4248  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
4249  * @pf: the PF
4250  **/
4251 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
4252 {
4253         int v;
4254
4255         for (v = 0; v < pf->num_alloc_vsi; v++) {
4256                 if (pf->vsi[v])
4257                         i40e_quiesce_vsi(pf->vsi[v]);
4258         }
4259 }
4260
4261 /**
4262  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
4263  * @pf: the PF
4264  **/
4265 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
4266 {
4267         int v;
4268
4269         for (v = 0; v < pf->num_alloc_vsi; v++) {
4270                 if (pf->vsi[v])
4271                         i40e_unquiesce_vsi(pf->vsi[v]);
4272         }
4273 }
4274
4275 #ifdef CONFIG_I40E_DCB
4276 /**
4277  * i40e_vsi_wait_txq_disabled - Wait for VSI's queues to be disabled
4278  * @vsi: the VSI being configured
4279  *
4280  * This function waits for the given VSI's Tx queues to be disabled.
4281  **/
4282 static int i40e_vsi_wait_txq_disabled(struct i40e_vsi *vsi)
4283 {
4284         struct i40e_pf *pf = vsi->back;
4285         int i, pf_q, ret;
4286
4287         pf_q = vsi->base_queue;
4288         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
4289                 /* Check and wait for the disable status of the queue */
4290                 ret = i40e_pf_txq_wait(pf, pf_q, false);
4291                 if (ret) {
4292                         dev_info(&pf->pdev->dev,
4293                                  "VSI seid %d Tx ring %d disable timeout\n",
4294                                  vsi->seid, pf_q);
4295                         return ret;
4296                 }
4297         }
4298
4299         return 0;
4300 }
4301
4302 /**
4303  * i40e_pf_wait_txq_disabled - Wait for all queues of PF VSIs to be disabled
4304  * @pf: the PF
4305  *
4306  * This function waits for the Tx queues to be in disabled state for all the
4307  * VSIs that are managed by this PF.
4308  **/
4309 static int i40e_pf_wait_txq_disabled(struct i40e_pf *pf)
4310 {
4311         int v, ret = 0;
4312
4313         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4314                 /* No need to wait for FCoE VSI queues */
4315                 if (pf->vsi[v] && pf->vsi[v]->type != I40E_VSI_FCOE) {
4316                         ret = i40e_vsi_wait_txq_disabled(pf->vsi[v]);
4317                         if (ret)
4318                                 break;
4319                 }
4320         }
4321
4322         return ret;
4323 }
4324
4325 #endif
4326
4327 /**
4328  * i40e_detect_recover_hung_queue - Function to detect and recover hung_queue
4329  * @q_idx: TX queue number
4330  * @vsi: Pointer to VSI struct
4331  *
4332  * This function checks specified queue for given VSI. Detects hung condition.
4333  * Sets hung bit since it is two step process. Before next run of service task
4334  * if napi_poll runs, it reset 'hung' bit for respective q_vector. If not,
4335  * hung condition remain unchanged and during subsequent run, this function
4336  * issues SW interrupt to recover from hung condition.
4337  **/
4338 static void i40e_detect_recover_hung_queue(int q_idx, struct i40e_vsi *vsi)
4339 {
4340         struct i40e_ring *tx_ring = NULL;
4341         struct i40e_pf  *pf;
4342         u32 head, val, tx_pending;
4343         int i;
4344
4345         pf = vsi->back;
4346
4347         /* now that we have an index, find the tx_ring struct */
4348         for (i = 0; i < vsi->num_queue_pairs; i++) {
4349                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
4350                         if (q_idx == vsi->tx_rings[i]->queue_index) {
4351                                 tx_ring = vsi->tx_rings[i];
4352                                 break;
4353                         }
4354                 }
4355         }
4356
4357         if (!tx_ring)
4358                 return;
4359
4360         /* Read interrupt register */
4361         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4362                 val = rd32(&pf->hw,
4363                            I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
4364                                                tx_ring->vsi->base_vector - 1));
4365         else
4366                 val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);
4367
4368         head = i40e_get_head(tx_ring);
4369
4370         tx_pending = i40e_get_tx_pending(tx_ring);
4371
4372         /* Interrupts are disabled and TX pending is non-zero,
4373          * trigger the SW interrupt (don't wait). Worst case
4374          * there will be one extra interrupt which may result
4375          * into not cleaning any queues because queues are cleaned.
4376          */
4377         if (tx_pending && (!(val & I40E_PFINT_DYN_CTLN_INTENA_MASK)))
4378                 i40e_force_wb(vsi, tx_ring->q_vector);
4379 }
4380
4381 /**
4382  * i40e_detect_recover_hung - Function to detect and recover hung_queues
4383  * @pf:  pointer to PF struct
4384  *
4385  * LAN VSI has netdev and netdev has TX queues. This function is to check
4386  * each of those TX queues if they are hung, trigger recovery by issuing
4387  * SW interrupt.
4388  **/
4389 static void i40e_detect_recover_hung(struct i40e_pf *pf)
4390 {
4391         struct net_device *netdev;
4392         struct i40e_vsi *vsi;
4393         int i;
4394
4395         /* Only for LAN VSI */
4396         vsi = pf->vsi[pf->lan_vsi];
4397
4398         if (!vsi)
4399                 return;
4400
4401         /* Make sure, VSI state is not DOWN/RECOVERY_PENDING */
4402         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
4403             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
4404                 return;
4405
4406         /* Make sure type is MAIN VSI */
4407         if (vsi->type != I40E_VSI_MAIN)
4408                 return;
4409
4410         netdev = vsi->netdev;
4411         if (!netdev)
4412                 return;
4413
4414         /* Bail out if netif_carrier is not OK */
4415         if (!netif_carrier_ok(netdev))
4416                 return;
4417
4418         /* Go thru' TX queues for netdev */
4419         for (i = 0; i < netdev->num_tx_queues; i++) {
4420                 struct netdev_queue *q;
4421
4422                 q = netdev_get_tx_queue(netdev, i);
4423                 if (q)
4424                         i40e_detect_recover_hung_queue(i, vsi);
4425         }
4426 }
4427
4428 /**
4429  * i40e_get_iscsi_tc_map - Return TC map for iSCSI APP
4430  * @pf: pointer to PF
4431  *
4432  * Get TC map for ISCSI PF type that will include iSCSI TC
4433  * and LAN TC.
4434  **/
4435 static u8 i40e_get_iscsi_tc_map(struct i40e_pf *pf)
4436 {
4437         struct i40e_dcb_app_priority_table app;
4438         struct i40e_hw *hw = &pf->hw;
4439         u8 enabled_tc = 1; /* TC0 is always enabled */
4440         u8 tc, i;
4441         /* Get the iSCSI APP TLV */
4442         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4443
4444         for (i = 0; i < dcbcfg->numapps; i++) {
4445                 app = dcbcfg->app[i];
4446                 if (app.selector == I40E_APP_SEL_TCPIP &&
4447                     app.protocolid == I40E_APP_PROTOID_ISCSI) {
4448                         tc = dcbcfg->etscfg.prioritytable[app.priority];
4449                         enabled_tc |= BIT_ULL(tc);
4450                         break;
4451                 }
4452         }
4453
4454         return enabled_tc;
4455 }
4456
4457 /**
4458  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
4459  * @dcbcfg: the corresponding DCBx configuration structure
4460  *
4461  * Return the number of TCs from given DCBx configuration
4462  **/
4463 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
4464 {
4465         u8 num_tc = 0;
4466         int i;
4467
4468         /* Scan the ETS Config Priority Table to find
4469          * traffic class enabled for a given priority
4470          * and use the traffic class index to get the
4471          * number of traffic classes enabled
4472          */
4473         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
4474                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
4475                         num_tc = dcbcfg->etscfg.prioritytable[i];
4476         }
4477
4478         /* Traffic class index starts from zero so
4479          * increment to return the actual count
4480          */
4481         return num_tc + 1;
4482 }
4483
4484 /**
4485  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
4486  * @dcbcfg: the corresponding DCBx configuration structure
4487  *
4488  * Query the current DCB configuration and return the number of
4489  * traffic classes enabled from the given DCBX config
4490  **/
4491 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
4492 {
4493         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
4494         u8 enabled_tc = 1;
4495         u8 i;
4496
4497         for (i = 0; i < num_tc; i++)
4498                 enabled_tc |= BIT(i);
4499
4500         return enabled_tc;
4501 }
4502
4503 /**
4504  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
4505  * @pf: PF being queried
4506  *
4507  * Return number of traffic classes enabled for the given PF
4508  **/
4509 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
4510 {
4511         struct i40e_hw *hw = &pf->hw;
4512         u8 i, enabled_tc;
4513         u8 num_tc = 0;
4514         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4515
4516         /* If DCB is not enabled then always in single TC */
4517         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
4518                 return 1;
4519
4520         /* SFP mode will be enabled for all TCs on port */
4521         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
4522                 return i40e_dcb_get_num_tc(dcbcfg);
4523
4524         /* MFP mode return count of enabled TCs for this PF */
4525         if (pf->hw.func_caps.iscsi)
4526                 enabled_tc =  i40e_get_iscsi_tc_map(pf);
4527         else
4528                 return 1; /* Only TC0 */
4529
4530         /* At least have TC0 */
4531         enabled_tc = (enabled_tc ? enabled_tc : 0x1);
4532         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4533                 if (enabled_tc & BIT_ULL(i))
4534                         num_tc++;
4535         }
4536         return num_tc;
4537 }
4538
4539 /**
4540  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
4541  * @pf: PF being queried
4542  *
4543  * Return a bitmap for first enabled traffic class for this PF.
4544  **/
4545 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
4546 {
4547         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
4548         u8 i = 0;
4549
4550         if (!enabled_tc)
4551                 return 0x1; /* TC0 */
4552
4553         /* Find the first enabled TC */
4554         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4555                 if (enabled_tc & BIT_ULL(i))
4556                         break;
4557         }
4558
4559         return BIT(i);
4560 }
4561
4562 /**
4563  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
4564  * @pf: PF being queried
4565  *
4566  * Return a bitmap for enabled traffic classes for this PF.
4567  **/
4568 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
4569 {
4570         /* If DCB is not enabled for this PF then just return default TC */
4571         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
4572                 return i40e_pf_get_default_tc(pf);
4573
4574         /* SFP mode we want PF to be enabled for all TCs */
4575         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
4576                 return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
4577
4578         /* MFP enabled and iSCSI PF type */
4579         if (pf->hw.func_caps.iscsi)
4580                 return i40e_get_iscsi_tc_map(pf);
4581         else
4582                 return i40e_pf_get_default_tc(pf);
4583 }
4584
4585 /**
4586  * i40e_vsi_get_bw_info - Query VSI BW Information
4587  * @vsi: the VSI being queried
4588  *
4589  * Returns 0 on success, negative value on failure
4590  **/
4591 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
4592 {
4593         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
4594         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
4595         struct i40e_pf *pf = vsi->back;
4596         struct i40e_hw *hw = &pf->hw;
4597         i40e_status ret;
4598         u32 tc_bw_max;
4599         int i;
4600
4601         /* Get the VSI level BW configuration */
4602         ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
4603         if (ret) {
4604                 dev_info(&pf->pdev->dev,
4605                          "couldn't get PF vsi bw config, err %s aq_err %s\n",
4606                          i40e_stat_str(&pf->hw, ret),
4607                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4608                 return -EINVAL;
4609         }
4610
4611         /* Get the VSI level BW configuration per TC */
4612         ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
4613                                                NULL);
4614         if (ret) {
4615                 dev_info(&pf->pdev->dev,
4616                          "couldn't get PF vsi ets bw config, err %s aq_err %s\n",
4617                          i40e_stat_str(&pf->hw, ret),
4618                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4619                 return -EINVAL;
4620         }
4621
4622         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
4623                 dev_info(&pf->pdev->dev,
4624                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
4625                          bw_config.tc_valid_bits,
4626                          bw_ets_config.tc_valid_bits);
4627                 /* Still continuing */
4628         }
4629
4630         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
4631         vsi->bw_max_quanta = bw_config.max_bw;
4632         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
4633                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
4634         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4635                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
4636                 vsi->bw_ets_limit_credits[i] =
4637                                         le16_to_cpu(bw_ets_config.credits[i]);
4638                 /* 3 bits out of 4 for each TC */
4639                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
4640         }
4641
4642         return 0;
4643 }
4644
4645 /**
4646  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
4647  * @vsi: the VSI being configured
4648  * @enabled_tc: TC bitmap
4649  * @bw_credits: BW shared credits per TC
4650  *
4651  * Returns 0 on success, negative value on failure
4652  **/
4653 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
4654                                        u8 *bw_share)
4655 {
4656         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
4657         i40e_status ret;
4658         int i;
4659
4660         bw_data.tc_valid_bits = enabled_tc;
4661         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
4662                 bw_data.tc_bw_credits[i] = bw_share[i];
4663
4664         ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
4665                                        NULL);
4666         if (ret) {
4667                 dev_info(&vsi->back->pdev->dev,
4668                          "AQ command Config VSI BW allocation per TC failed = %d\n",
4669                          vsi->back->hw.aq.asq_last_status);
4670                 return -EINVAL;
4671         }
4672
4673         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
4674                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
4675
4676         return 0;
4677 }
4678
4679 /**
4680  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
4681  * @vsi: the VSI being configured
4682  * @enabled_tc: TC map to be enabled
4683  *
4684  **/
4685 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
4686 {
4687         struct net_device *netdev = vsi->netdev;
4688         struct i40e_pf *pf = vsi->back;
4689         struct i40e_hw *hw = &pf->hw;
4690         u8 netdev_tc = 0;
4691         int i;
4692         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4693
4694         if (!netdev)
4695                 return;
4696
4697         if (!enabled_tc) {
4698                 netdev_reset_tc(netdev);
4699                 return;
4700         }
4701
4702         /* Set up actual enabled TCs on the VSI */
4703         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
4704                 return;
4705
4706         /* set per TC queues for the VSI */
4707         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4708                 /* Only set TC queues for enabled tcs
4709                  *
4710                  * e.g. For a VSI that has TC0 and TC3 enabled the
4711                  * enabled_tc bitmap would be 0x00001001; the driver
4712                  * will set the numtc for netdev as 2 that will be
4713                  * referenced by the netdev layer as TC 0 and 1.
4714                  */
4715                 if (vsi->tc_config.enabled_tc & BIT_ULL(i))
4716                         netdev_set_tc_queue(netdev,
4717                                         vsi->tc_config.tc_info[i].netdev_tc,
4718                                         vsi->tc_config.tc_info[i].qcount,
4719                                         vsi->tc_config.tc_info[i].qoffset);
4720         }
4721
4722         /* Assign UP2TC map for the VSI */
4723         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
4724                 /* Get the actual TC# for the UP */
4725                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
4726                 /* Get the mapped netdev TC# for the UP */
4727                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
4728                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
4729         }
4730 }
4731
4732 /**
4733  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
4734  * @vsi: the VSI being configured
4735  * @ctxt: the ctxt buffer returned from AQ VSI update param command
4736  **/
4737 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
4738                                       struct i40e_vsi_context *ctxt)
4739 {
4740         /* copy just the sections touched not the entire info
4741          * since not all sections are valid as returned by
4742          * update vsi params
4743          */
4744         vsi->info.mapping_flags = ctxt->info.mapping_flags;
4745         memcpy(&vsi->info.queue_mapping,
4746                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
4747         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
4748                sizeof(vsi->info.tc_mapping));
4749 }
4750
4751 /**
4752  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
4753  * @vsi: VSI to be configured
4754  * @enabled_tc: TC bitmap
4755  *
4756  * This configures a particular VSI for TCs that are mapped to the
4757  * given TC bitmap. It uses default bandwidth share for TCs across
4758  * VSIs to configure TC for a particular VSI.
4759  *
4760  * NOTE:
4761  * It is expected that the VSI queues have been quisced before calling
4762  * this function.
4763  **/
4764 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
4765 {
4766         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
4767         struct i40e_vsi_context ctxt;
4768         int ret = 0;
4769         int i;
4770
4771         /* Check if enabled_tc is same as existing or new TCs */
4772         if (vsi->tc_config.enabled_tc == enabled_tc)
4773                 return ret;
4774
4775         /* Enable ETS TCs with equal BW Share for now across all VSIs */
4776         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4777                 if (enabled_tc & BIT_ULL(i))
4778                         bw_share[i] = 1;
4779         }
4780
4781         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
4782         if (ret) {
4783                 dev_info(&vsi->back->pdev->dev,
4784                          "Failed configuring TC map %d for VSI %d\n",
4785                          enabled_tc, vsi->seid);
4786                 goto out;
4787         }
4788
4789         /* Update Queue Pairs Mapping for currently enabled UPs */
4790         ctxt.seid = vsi->seid;
4791         ctxt.pf_num = vsi->back->hw.pf_id;
4792         ctxt.vf_num = 0;
4793         ctxt.uplink_seid = vsi->uplink_seid;
4794         ctxt.info = vsi->info;
4795         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
4796
4797         /* Update the VSI after updating the VSI queue-mapping information */
4798         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
4799         if (ret) {
4800                 dev_info(&vsi->back->pdev->dev,
4801                          "Update vsi tc config failed, err %s aq_err %s\n",
4802                          i40e_stat_str(&vsi->back->hw, ret),
4803                          i40e_aq_str(&vsi->back->hw,
4804                                      vsi->back->hw.aq.asq_last_status));
4805                 goto out;
4806         }
4807         /* update the local VSI info with updated queue map */
4808         i40e_vsi_update_queue_map(vsi, &ctxt);
4809         vsi->info.valid_sections = 0;
4810
4811         /* Update current VSI BW information */
4812         ret = i40e_vsi_get_bw_info(vsi);
4813         if (ret) {
4814                 dev_info(&vsi->back->pdev->dev,
4815                          "Failed updating vsi bw info, err %s aq_err %s\n",
4816                          i40e_stat_str(&vsi->back->hw, ret),
4817                          i40e_aq_str(&vsi->back->hw,
4818                                      vsi->back->hw.aq.asq_last_status));
4819                 goto out;
4820         }
4821
4822         /* Update the netdev TC setup */
4823         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
4824 out:
4825         return ret;
4826 }
4827
4828 /**
4829  * i40e_veb_config_tc - Configure TCs for given VEB
4830  * @veb: given VEB
4831  * @enabled_tc: TC bitmap
4832  *
4833  * Configures given TC bitmap for VEB (switching) element
4834  **/
4835 int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
4836 {
4837         struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
4838         struct i40e_pf *pf = veb->pf;
4839         int ret = 0;
4840         int i;
4841
4842         /* No TCs or already enabled TCs just return */
4843         if (!enabled_tc || veb->enabled_tc == enabled_tc)
4844                 return ret;
4845
4846         bw_data.tc_valid_bits = enabled_tc;
4847         /* bw_data.absolute_credits is not set (relative) */
4848
4849         /* Enable ETS TCs with equal BW Share for now */
4850         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4851                 if (enabled_tc & BIT_ULL(i))
4852                         bw_data.tc_bw_share_credits[i] = 1;
4853         }
4854
4855         ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
4856                                                    &bw_data, NULL);
4857         if (ret) {
4858                 dev_info(&pf->pdev->dev,
4859                          "VEB bw config failed, err %s aq_err %s\n",
4860                          i40e_stat_str(&pf->hw, ret),
4861                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4862                 goto out;
4863         }
4864
4865         /* Update the BW information */
4866         ret = i40e_veb_get_bw_info(veb);
4867         if (ret) {
4868                 dev_info(&pf->pdev->dev,
4869                          "Failed getting veb bw config, err %s aq_err %s\n",
4870                          i40e_stat_str(&pf->hw, ret),
4871                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4872         }
4873
4874 out:
4875         return ret;
4876 }
4877
4878 #ifdef CONFIG_I40E_DCB
4879 /**
4880  * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
4881  * @pf: PF struct
4882  *
4883  * Reconfigure VEB/VSIs on a given PF; it is assumed that
4884  * the caller would've quiesce all the VSIs before calling
4885  * this function
4886  **/
4887 static void i40e_dcb_reconfigure(struct i40e_pf *pf)
4888 {
4889         u8 tc_map = 0;
4890         int ret;
4891         u8 v;
4892
4893         /* Enable the TCs available on PF to all VEBs */
4894         tc_map = i40e_pf_get_tc_map(pf);
4895         for (v = 0; v < I40E_MAX_VEB; v++) {
4896                 if (!pf->veb[v])
4897                         continue;
4898                 ret = i40e_veb_config_tc(pf->veb[v], tc_map);
4899                 if (ret) {
4900                         dev_info(&pf->pdev->dev,
4901                                  "Failed configuring TC for VEB seid=%d\n",
4902                                  pf->veb[v]->seid);
4903                         /* Will try to configure as many components */
4904                 }
4905         }
4906
4907         /* Update each VSI */
4908         for (v = 0; v < pf->num_alloc_vsi; v++) {
4909                 if (!pf->vsi[v])
4910                         continue;
4911
4912                 /* - Enable all TCs for the LAN VSI
4913 #ifdef I40E_FCOE
4914                  * - For FCoE VSI only enable the TC configured
4915                  *   as per the APP TLV
4916 #endif
4917                  * - For all others keep them at TC0 for now
4918                  */
4919                 if (v == pf->lan_vsi)
4920                         tc_map = i40e_pf_get_tc_map(pf);
4921                 else
4922                         tc_map = i40e_pf_get_default_tc(pf);
4923 #ifdef I40E_FCOE
4924                 if (pf->vsi[v]->type == I40E_VSI_FCOE)
4925                         tc_map = i40e_get_fcoe_tc_map(pf);
4926 #endif /* #ifdef I40E_FCOE */
4927
4928                 ret = i40e_vsi_config_tc(pf->vsi[v], tc_map);
4929                 if (ret) {
4930                         dev_info(&pf->pdev->dev,
4931                                  "Failed configuring TC for VSI seid=%d\n",
4932                                  pf->vsi[v]->seid);
4933                         /* Will try to configure as many components */
4934                 } else {
4935                         /* Re-configure VSI vectors based on updated TC map */
4936                         i40e_vsi_map_rings_to_vectors(pf->vsi[v]);
4937                         if (pf->vsi[v]->netdev)
4938                                 i40e_dcbnl_set_all(pf->vsi[v]);
4939                 }
4940         }
4941 }
4942
4943 /**
4944  * i40e_resume_port_tx - Resume port Tx
4945  * @pf: PF struct
4946  *
4947  * Resume a port's Tx and issue a PF reset in case of failure to
4948  * resume.
4949  **/
4950 static int i40e_resume_port_tx(struct i40e_pf *pf)
4951 {
4952         struct i40e_hw *hw = &pf->hw;
4953         int ret;
4954
4955         ret = i40e_aq_resume_port_tx(hw, NULL);
4956         if (ret) {
4957                 dev_info(&pf->pdev->dev,
4958                          "Resume Port Tx failed, err %s aq_err %s\n",
4959                           i40e_stat_str(&pf->hw, ret),
4960                           i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4961                 /* Schedule PF reset to recover */
4962                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4963                 i40e_service_event_schedule(pf);
4964         }
4965
4966         return ret;
4967 }
4968
4969 /**
4970  * i40e_init_pf_dcb - Initialize DCB configuration
4971  * @pf: PF being configured
4972  *
4973  * Query the current DCB configuration and cache it
4974  * in the hardware structure
4975  **/
4976 static int i40e_init_pf_dcb(struct i40e_pf *pf)
4977 {
4978         struct i40e_hw *hw = &pf->hw;
4979         int err = 0;
4980
4981         /* Do not enable DCB for SW1 and SW2 images even if the FW is capable */
4982         if (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 33)) ||
4983             (pf->hw.aq.fw_maj_ver < 4))
4984                 goto out;
4985
4986         /* Get the initial DCB configuration */
4987         err = i40e_init_dcb(hw);
4988         if (!err) {
4989                 /* Device/Function is not DCBX capable */
4990                 if ((!hw->func_caps.dcb) ||
4991                     (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
4992                         dev_info(&pf->pdev->dev,
4993                                  "DCBX offload is not supported or is disabled for this PF.\n");
4994
4995                         if (pf->flags & I40E_FLAG_MFP_ENABLED)
4996                                 goto out;
4997
4998                 } else {
4999                         /* When status is not DISABLED then DCBX in FW */
5000                         pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
5001                                        DCB_CAP_DCBX_VER_IEEE;
5002
5003                         pf->flags |= I40E_FLAG_DCB_CAPABLE;
5004                         /* Enable DCB tagging only when more than one TC */
5005                         if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
5006                                 pf->flags |= I40E_FLAG_DCB_ENABLED;
5007                         dev_dbg(&pf->pdev->dev,
5008                                 "DCBX offload is supported for this PF.\n");
5009                 }
5010         } else {
5011                 dev_info(&pf->pdev->dev,
5012                          "Query for DCB configuration failed, err %s aq_err %s\n",
5013                          i40e_stat_str(&pf->hw, err),
5014                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5015         }
5016
5017 out:
5018         return err;
5019 }
5020 #endif /* CONFIG_I40E_DCB */
5021 #define SPEED_SIZE 14
5022 #define FC_SIZE 8
5023 /**
5024  * i40e_print_link_message - print link up or down
5025  * @vsi: the VSI for which link needs a message
5026  */
5027 void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
5028 {
5029         char *speed = "Unknown";
5030         char *fc = "Unknown";
5031
5032         if (vsi->current_isup == isup)
5033                 return;
5034         vsi->current_isup = isup;
5035         if (!isup) {
5036                 netdev_info(vsi->netdev, "NIC Link is Down\n");
5037                 return;
5038         }
5039
5040         /* Warn user if link speed on NPAR enabled partition is not at
5041          * least 10GB
5042          */
5043         if (vsi->back->hw.func_caps.npar_enable &&
5044             (vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_1GB ||
5045              vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_100MB))
5046                 netdev_warn(vsi->netdev,
5047                             "The partition detected link speed that is less than 10Gbps\n");
5048
5049         switch (vsi->back->hw.phy.link_info.link_speed) {
5050         case I40E_LINK_SPEED_40GB:
5051                 speed = "40 G";
5052                 break;
5053         case I40E_LINK_SPEED_20GB:
5054                 speed = "20 G";
5055                 break;
5056         case I40E_LINK_SPEED_10GB:
5057                 speed = "10 G";
5058                 break;
5059         case I40E_LINK_SPEED_1GB:
5060                 speed = "1000 M";
5061                 break;
5062         case I40E_LINK_SPEED_100MB:
5063                 speed = "100 M";
5064                 break;
5065         default:
5066                 break;
5067         }
5068
5069         switch (vsi->back->hw.fc.current_mode) {
5070         case I40E_FC_FULL:
5071                 fc = "RX/TX";
5072                 break;
5073         case I40E_FC_TX_PAUSE:
5074                 fc = "TX";
5075                 break;
5076         case I40E_FC_RX_PAUSE:
5077                 fc = "RX";
5078                 break;
5079         default:
5080                 fc = "None";
5081                 break;
5082         }
5083
5084         netdev_info(vsi->netdev, "NIC Link is Up %sbps Full Duplex, Flow Control: %s\n",
5085                     speed, fc);
5086 }
5087
5088 /**
5089  * i40e_up_complete - Finish the last steps of bringing up a connection
5090  * @vsi: the VSI being configured
5091  **/
5092 static int i40e_up_complete(struct i40e_vsi *vsi)
5093 {
5094         struct i40e_pf *pf = vsi->back;
5095         int err;
5096
5097         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5098                 i40e_vsi_configure_msix(vsi);
5099         else
5100                 i40e_configure_msi_and_legacy(vsi);
5101
5102         /* start rings */
5103         err = i40e_vsi_control_rings(vsi, true);
5104         if (err)
5105                 return err;
5106
5107         clear_bit(__I40E_DOWN, &vsi->state);
5108         i40e_napi_enable_all(vsi);
5109         i40e_vsi_enable_irq(vsi);
5110
5111         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
5112             (vsi->netdev)) {
5113                 i40e_print_link_message(vsi, true);
5114                 netif_tx_start_all_queues(vsi->netdev);
5115                 netif_carrier_on(vsi->netdev);
5116         } else if (vsi->netdev) {
5117                 i40e_print_link_message(vsi, false);
5118                 /* need to check for qualified module here*/
5119                 if ((pf->hw.phy.link_info.link_info &
5120                         I40E_AQ_MEDIA_AVAILABLE) &&
5121                     (!(pf->hw.phy.link_info.an_info &
5122                         I40E_AQ_QUALIFIED_MODULE)))
5123                         netdev_err(vsi->netdev,
5124                                    "the driver failed to link because an unqualified module was detected.");
5125         }
5126
5127         /* replay FDIR SB filters */
5128         if (vsi->type == I40E_VSI_FDIR) {
5129                 /* reset fd counters */
5130                 pf->fd_add_err = pf->fd_atr_cnt = 0;
5131                 if (pf->fd_tcp_rule > 0) {
5132                         pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
5133                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
5134                                 dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 exist\n");
5135                         pf->fd_tcp_rule = 0;
5136                 }
5137                 i40e_fdir_filter_restore(vsi);
5138         }
5139         i40e_service_event_schedule(pf);
5140
5141         return 0;
5142 }
5143
5144 /**
5145  * i40e_vsi_reinit_locked - Reset the VSI
5146  * @vsi: the VSI being configured
5147  *
5148  * Rebuild the ring structs after some configuration
5149  * has changed, e.g. MTU size.
5150  **/
5151 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
5152 {
5153         struct i40e_pf *pf = vsi->back;
5154
5155         WARN_ON(in_interrupt());
5156         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
5157                 usleep_range(1000, 2000);
5158         i40e_down(vsi);
5159
5160         /* Give a VF some time to respond to the reset.  The
5161          * two second wait is based upon the watchdog cycle in
5162          * the VF driver.
5163          */
5164         if (vsi->type == I40E_VSI_SRIOV)
5165                 msleep(2000);
5166         i40e_up(vsi);
5167         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
5168 }
5169
5170 /**
5171  * i40e_up - Bring the connection back up after being down
5172  * @vsi: the VSI being configured
5173  **/
5174 int i40e_up(struct i40e_vsi *vsi)
5175 {
5176         int err;
5177
5178         err = i40e_vsi_configure(vsi);
5179         if (!err)
5180                 err = i40e_up_complete(vsi);
5181
5182         return err;
5183 }
5184
5185 /**
5186  * i40e_down - Shutdown the connection processing
5187  * @vsi: the VSI being stopped
5188  **/
5189 void i40e_down(struct i40e_vsi *vsi)
5190 {
5191         int i;
5192
5193         /* It is assumed that the caller of this function
5194          * sets the vsi->state __I40E_DOWN bit.
5195          */
5196         if (vsi->netdev) {
5197                 netif_carrier_off(vsi->netdev);
5198                 netif_tx_disable(vsi->netdev);
5199         }
5200         i40e_vsi_disable_irq(vsi);
5201         i40e_vsi_control_rings(vsi, false);
5202         i40e_napi_disable_all(vsi);
5203
5204         for (i = 0; i < vsi->num_queue_pairs; i++) {
5205                 i40e_clean_tx_ring(vsi->tx_rings[i]);
5206                 i40e_clean_rx_ring(vsi->rx_rings[i]);
5207         }
5208 }
5209
5210 /**
5211  * i40e_setup_tc - configure multiple traffic classes
5212  * @netdev: net device to configure
5213  * @tc: number of traffic classes to enable
5214  **/
5215 #ifdef I40E_FCOE
5216 int i40e_setup_tc(struct net_device *netdev, u8 tc)
5217 #else
5218 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
5219 #endif
5220 {
5221         struct i40e_netdev_priv *np = netdev_priv(netdev);
5222         struct i40e_vsi *vsi = np->vsi;
5223         struct i40e_pf *pf = vsi->back;
5224         u8 enabled_tc = 0;
5225         int ret = -EINVAL;
5226         int i;
5227
5228         /* Check if DCB enabled to continue */
5229         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
5230                 netdev_info(netdev, "DCB is not enabled for adapter\n");
5231                 goto exit;
5232         }
5233
5234         /* Check if MFP enabled */
5235         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
5236                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
5237                 goto exit;
5238         }
5239
5240         /* Check whether tc count is within enabled limit */
5241         if (tc > i40e_pf_get_num_tc(pf)) {
5242                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
5243                 goto exit;
5244         }
5245
5246         /* Generate TC map for number of tc requested */
5247         for (i = 0; i < tc; i++)
5248                 enabled_tc |= BIT_ULL(i);
5249
5250         /* Requesting same TC configuration as already enabled */
5251         if (enabled_tc == vsi->tc_config.enabled_tc)
5252                 return 0;
5253
5254         /* Quiesce VSI queues */
5255         i40e_quiesce_vsi(vsi);
5256
5257         /* Configure VSI for enabled TCs */
5258         ret = i40e_vsi_config_tc(vsi, enabled_tc);
5259         if (ret) {
5260                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
5261                             vsi->seid);
5262                 goto exit;
5263         }
5264
5265         /* Unquiesce VSI */
5266         i40e_unquiesce_vsi(vsi);
5267
5268 exit:
5269         return ret;
5270 }
5271
5272 /**
5273  * i40e_open - Called when a network interface is made active
5274  * @netdev: network interface device structure
5275  *
5276  * The open entry point is called when a network interface is made
5277  * active by the system (IFF_UP).  At this point all resources needed
5278  * for transmit and receive operations are allocated, the interrupt
5279  * handler is registered with the OS, the netdev watchdog subtask is
5280  * enabled, and the stack is notified that the interface is ready.
5281  *
5282  * Returns 0 on success, negative value on failure
5283  **/
5284 int i40e_open(struct net_device *netdev)
5285 {
5286         struct i40e_netdev_priv *np = netdev_priv(netdev);
5287         struct i40e_vsi *vsi = np->vsi;
5288         struct i40e_pf *pf = vsi->back;
5289         int err;
5290
5291         /* disallow open during test or if eeprom is broken */
5292         if (test_bit(__I40E_TESTING, &pf->state) ||
5293             test_bit(__I40E_BAD_EEPROM, &pf->state))
5294                 return -EBUSY;
5295
5296         netif_carrier_off(netdev);
5297
5298         err = i40e_vsi_open(vsi);
5299         if (err)
5300                 return err;
5301
5302         /* configure global TSO hardware offload settings */
5303         wr32(&pf->hw, I40E_GLLAN_TSOMSK_F, be32_to_cpu(TCP_FLAG_PSH |
5304                                                        TCP_FLAG_FIN) >> 16);
5305         wr32(&pf->hw, I40E_GLLAN_TSOMSK_M, be32_to_cpu(TCP_FLAG_PSH |
5306                                                        TCP_FLAG_FIN |
5307                                                        TCP_FLAG_CWR) >> 16);
5308         wr32(&pf->hw, I40E_GLLAN_TSOMSK_L, be32_to_cpu(TCP_FLAG_CWR) >> 16);
5309
5310 #ifdef CONFIG_I40E_VXLAN
5311         vxlan_get_rx_port(netdev);
5312 #endif
5313
5314         return 0;
5315 }
5316
5317 /**
5318  * i40e_vsi_open -
5319  * @vsi: the VSI to open
5320  *
5321  * Finish initialization of the VSI.
5322  *
5323  * Returns 0 on success, negative value on failure
5324  **/
5325 int i40e_vsi_open(struct i40e_vsi *vsi)
5326 {
5327         struct i40e_pf *pf = vsi->back;
5328         char int_name[I40E_INT_NAME_STR_LEN];
5329         int err;
5330
5331         /* allocate descriptors */
5332         err = i40e_vsi_setup_tx_resources(vsi);
5333         if (err)
5334                 goto err_setup_tx;
5335         err = i40e_vsi_setup_rx_resources(vsi);
5336         if (err)
5337                 goto err_setup_rx;
5338
5339         err = i40e_vsi_configure(vsi);
5340         if (err)
5341                 goto err_setup_rx;
5342
5343         if (vsi->netdev) {
5344                 snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
5345                          dev_driver_string(&pf->pdev->dev), vsi->netdev->name);
5346                 err = i40e_vsi_request_irq(vsi, int_name);
5347                 if (err)
5348                         goto err_setup_rx;
5349
5350                 /* Notify the stack of the actual queue counts. */
5351                 err = netif_set_real_num_tx_queues(vsi->netdev,
5352                                                    vsi->num_queue_pairs);
5353                 if (err)
5354                         goto err_set_queues;
5355
5356                 err = netif_set_real_num_rx_queues(vsi->netdev,
5357                                                    vsi->num_queue_pairs);
5358                 if (err)
5359                         goto err_set_queues;
5360
5361         } else if (vsi->type == I40E_VSI_FDIR) {
5362                 snprintf(int_name, sizeof(int_name) - 1, "%s-%s:fdir",
5363                          dev_driver_string(&pf->pdev->dev),
5364                          dev_name(&pf->pdev->dev));
5365                 err = i40e_vsi_request_irq(vsi, int_name);
5366
5367         } else {
5368                 err = -EINVAL;
5369                 goto err_setup_rx;
5370         }
5371
5372         err = i40e_up_complete(vsi);
5373         if (err)
5374                 goto err_up_complete;
5375
5376         return 0;
5377
5378 err_up_complete:
5379         i40e_down(vsi);
5380 err_set_queues:
5381         i40e_vsi_free_irq(vsi);
5382 err_setup_rx:
5383         i40e_vsi_free_rx_resources(vsi);
5384 err_setup_tx:
5385         i40e_vsi_free_tx_resources(vsi);
5386         if (vsi == pf->vsi[pf->lan_vsi])
5387                 i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
5388
5389         return err;
5390 }
5391
5392 /**
5393  * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
5394  * @pf: Pointer to PF
5395  *
5396  * This function destroys the hlist where all the Flow Director
5397  * filters were saved.
5398  **/
5399 static void i40e_fdir_filter_exit(struct i40e_pf *pf)
5400 {
5401         struct i40e_fdir_filter *filter;
5402         struct hlist_node *node2;
5403
5404         hlist_for_each_entry_safe(filter, node2,
5405                                   &pf->fdir_filter_list, fdir_node) {
5406                 hlist_del(&filter->fdir_node);
5407                 kfree(filter);
5408         }
5409         pf->fdir_pf_active_filters = 0;
5410 }
5411
5412 /**
5413  * i40e_close - Disables a network interface
5414  * @netdev: network interface device structure
5415  *
5416  * The close entry point is called when an interface is de-activated
5417  * by the OS.  The hardware is still under the driver's control, but
5418  * this netdev interface is disabled.
5419  *
5420  * Returns 0, this is not allowed to fail
5421  **/
5422 #ifdef I40E_FCOE
5423 int i40e_close(struct net_device *netdev)
5424 #else
5425 static int i40e_close(struct net_device *netdev)
5426 #endif
5427 {
5428         struct i40e_netdev_priv *np = netdev_priv(netdev);
5429         struct i40e_vsi *vsi = np->vsi;
5430
5431         i40e_vsi_close(vsi);
5432
5433         return 0;
5434 }
5435
5436 /**
5437  * i40e_do_reset - Start a PF or Core Reset sequence
5438  * @pf: board private structure
5439  * @reset_flags: which reset is requested
5440  *
5441  * The essential difference in resets is that the PF Reset
5442  * doesn't clear the packet buffers, doesn't reset the PE
5443  * firmware, and doesn't bother the other PFs on the chip.
5444  **/
5445 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
5446 {
5447         u32 val;
5448
5449         WARN_ON(in_interrupt());
5450
5451         if (i40e_check_asq_alive(&pf->hw))
5452                 i40e_vc_notify_reset(pf);
5453
5454         /* do the biggest reset indicated */
5455         if (reset_flags & BIT_ULL(__I40E_GLOBAL_RESET_REQUESTED)) {
5456
5457                 /* Request a Global Reset
5458                  *
5459                  * This will start the chip's countdown to the actual full
5460                  * chip reset event, and a warning interrupt to be sent
5461                  * to all PFs, including the requestor.  Our handler
5462                  * for the warning interrupt will deal with the shutdown
5463                  * and recovery of the switch setup.
5464                  */
5465                 dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
5466                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
5467                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
5468                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
5469
5470         } else if (reset_flags & BIT_ULL(__I40E_CORE_RESET_REQUESTED)) {
5471
5472                 /* Request a Core Reset
5473                  *
5474                  * Same as Global Reset, except does *not* include the MAC/PHY
5475                  */
5476                 dev_dbg(&pf->pdev->dev, "CoreR requested\n");
5477                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
5478                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
5479                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
5480                 i40e_flush(&pf->hw);
5481
5482         } else if (reset_flags & BIT_ULL(__I40E_PF_RESET_REQUESTED)) {
5483
5484                 /* Request a PF Reset
5485                  *
5486                  * Resets only the PF-specific registers
5487                  *
5488                  * This goes directly to the tear-down and rebuild of
5489                  * the switch, since we need to do all the recovery as
5490                  * for the Core Reset.
5491                  */
5492                 dev_dbg(&pf->pdev->dev, "PFR requested\n");
5493                 i40e_handle_reset_warning(pf);
5494
5495         } else if (reset_flags & BIT_ULL(__I40E_REINIT_REQUESTED)) {
5496                 int v;
5497
5498                 /* Find the VSI(s) that requested a re-init */
5499                 dev_info(&pf->pdev->dev,
5500                          "VSI reinit requested\n");
5501                 for (v = 0; v < pf->num_alloc_vsi; v++) {
5502                         struct i40e_vsi *vsi = pf->vsi[v];
5503
5504                         if (vsi != NULL &&
5505                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
5506                                 i40e_vsi_reinit_locked(pf->vsi[v]);
5507                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
5508                         }
5509                 }
5510         } else if (reset_flags & BIT_ULL(__I40E_DOWN_REQUESTED)) {
5511                 int v;
5512
5513                 /* Find the VSI(s) that needs to be brought down */
5514                 dev_info(&pf->pdev->dev, "VSI down requested\n");
5515                 for (v = 0; v < pf->num_alloc_vsi; v++) {
5516                         struct i40e_vsi *vsi = pf->vsi[v];
5517
5518                         if (vsi != NULL &&
5519                             test_bit(__I40E_DOWN_REQUESTED, &vsi->state)) {
5520                                 set_bit(__I40E_DOWN, &vsi->state);
5521                                 i40e_down(vsi);
5522                                 clear_bit(__I40E_DOWN_REQUESTED, &vsi->state);
5523                         }
5524                 }
5525         } else {
5526                 dev_info(&pf->pdev->dev,
5527                          "bad reset request 0x%08x\n", reset_flags);
5528         }
5529 }
5530
5531 #ifdef CONFIG_I40E_DCB
5532 /**
5533  * i40e_dcb_need_reconfig - Check if DCB needs reconfig
5534  * @pf: board private structure
5535  * @old_cfg: current DCB config
5536  * @new_cfg: new DCB config
5537  **/
5538 bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
5539                             struct i40e_dcbx_config *old_cfg,
5540                             struct i40e_dcbx_config *new_cfg)
5541 {
5542         bool need_reconfig = false;
5543
5544         /* Check if ETS configuration has changed */
5545         if (memcmp(&new_cfg->etscfg,
5546                    &old_cfg->etscfg,
5547                    sizeof(new_cfg->etscfg))) {
5548                 /* If Priority Table has changed reconfig is needed */
5549                 if (memcmp(&new_cfg->etscfg.prioritytable,
5550                            &old_cfg->etscfg.prioritytable,
5551                            sizeof(new_cfg->etscfg.prioritytable))) {
5552                         need_reconfig = true;
5553                         dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
5554                 }
5555
5556                 if (memcmp(&new_cfg->etscfg.tcbwtable,
5557                            &old_cfg->etscfg.tcbwtable,
5558                            sizeof(new_cfg->etscfg.tcbwtable)))
5559                         dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");
5560
5561                 if (memcmp(&new_cfg->etscfg.tsatable,
5562                            &old_cfg->etscfg.tsatable,
5563                            sizeof(new_cfg->etscfg.tsatable)))
5564                         dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
5565         }
5566
5567         /* Check if PFC configuration has changed */
5568         if (memcmp(&new_cfg->pfc,
5569                    &old_cfg->pfc,
5570                    sizeof(new_cfg->pfc))) {
5571                 need_reconfig = true;
5572                 dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
5573         }
5574
5575         /* Check if APP Table has changed */
5576         if (memcmp(&new_cfg->app,
5577                    &old_cfg->app,
5578                    sizeof(new_cfg->app))) {
5579                 need_reconfig = true;
5580                 dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
5581         }
5582
5583         dev_dbg(&pf->pdev->dev, "dcb need_reconfig=%d\n", need_reconfig);
5584         return need_reconfig;
5585 }
5586
5587 /**
5588  * i40e_handle_lldp_event - Handle LLDP Change MIB event
5589  * @pf: board private structure
5590  * @e: event info posted on ARQ
5591  **/
5592 static int i40e_handle_lldp_event(struct i40e_pf *pf,
5593                                   struct i40e_arq_event_info *e)
5594 {
5595         struct i40e_aqc_lldp_get_mib *mib =
5596                 (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
5597         struct i40e_hw *hw = &pf->hw;
5598         struct i40e_dcbx_config tmp_dcbx_cfg;
5599         bool need_reconfig = false;
5600         int ret = 0;
5601         u8 type;
5602
5603         /* Not DCB capable or capability disabled */
5604         if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
5605                 return ret;
5606
5607         /* Ignore if event is not for Nearest Bridge */
5608         type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
5609                 & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
5610         dev_dbg(&pf->pdev->dev, "LLDP event mib bridge type 0x%x\n", type);
5611         if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
5612                 return ret;
5613
5614         /* Check MIB Type and return if event for Remote MIB update */
5615         type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
5616         dev_dbg(&pf->pdev->dev,
5617                 "LLDP event mib type %s\n", type ? "remote" : "local");
5618         if (type == I40E_AQ_LLDP_MIB_REMOTE) {
5619                 /* Update the remote cached instance and return */
5620                 ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
5621                                 I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
5622                                 &hw->remote_dcbx_config);
5623                 goto exit;
5624         }
5625
5626         /* Store the old configuration */
5627         tmp_dcbx_cfg = hw->local_dcbx_config;
5628
5629         /* Reset the old DCBx configuration data */
5630         memset(&hw->local_dcbx_config, 0, sizeof(hw->local_dcbx_config));
5631         /* Get updated DCBX data from firmware */
5632         ret = i40e_get_dcb_config(&pf->hw);
5633         if (ret) {
5634                 dev_info(&pf->pdev->dev,
5635                          "Failed querying DCB configuration data from firmware, err %s aq_err %s\n",
5636                          i40e_stat_str(&pf->hw, ret),
5637                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5638                 goto exit;
5639         }
5640
5641         /* No change detected in DCBX configs */
5642         if (!memcmp(&tmp_dcbx_cfg, &hw->local_dcbx_config,
5643                     sizeof(tmp_dcbx_cfg))) {
5644                 dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
5645                 goto exit;
5646         }
5647
5648         need_reconfig = i40e_dcb_need_reconfig(pf, &tmp_dcbx_cfg,
5649                                                &hw->local_dcbx_config);
5650
5651         i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &hw->local_dcbx_config);
5652
5653         if (!need_reconfig)
5654                 goto exit;
5655
5656         /* Enable DCB tagging only when more than one TC */
5657         if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
5658                 pf->flags |= I40E_FLAG_DCB_ENABLED;
5659         else
5660                 pf->flags &= ~I40E_FLAG_DCB_ENABLED;
5661
5662         set_bit(__I40E_PORT_TX_SUSPENDED, &pf->state);
5663         /* Reconfiguration needed quiesce all VSIs */
5664         i40e_pf_quiesce_all_vsi(pf);
5665
5666         /* Changes in configuration update VEB/VSI */
5667         i40e_dcb_reconfigure(pf);
5668
5669         ret = i40e_resume_port_tx(pf);
5670
5671         clear_bit(__I40E_PORT_TX_SUSPENDED, &pf->state);
5672         /* In case of error no point in resuming VSIs */
5673         if (ret)
5674                 goto exit;
5675
5676         /* Wait for the PF's Tx queues to be disabled */
5677         ret = i40e_pf_wait_txq_disabled(pf);
5678         if (ret) {
5679                 /* Schedule PF reset to recover */
5680                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
5681                 i40e_service_event_schedule(pf);
5682         } else {
5683                 i40e_pf_unquiesce_all_vsi(pf);
5684         }
5685
5686 exit:
5687         return ret;
5688 }
5689 #endif /* CONFIG_I40E_DCB */
5690
5691 /**
5692  * i40e_do_reset_safe - Protected reset path for userland calls.
5693  * @pf: board private structure
5694  * @reset_flags: which reset is requested
5695  *
5696  **/
5697 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
5698 {
5699         rtnl_lock();
5700         i40e_do_reset(pf, reset_flags);
5701         rtnl_unlock();
5702 }
5703
5704 /**
5705  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
5706  * @pf: board private structure
5707  * @e: event info posted on ARQ
5708  *
5709  * Handler for LAN Queue Overflow Event generated by the firmware for PF
5710  * and VF queues
5711  **/
5712 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
5713                                            struct i40e_arq_event_info *e)
5714 {
5715         struct i40e_aqc_lan_overflow *data =
5716                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
5717         u32 queue = le32_to_cpu(data->prtdcb_rupto);
5718         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
5719         struct i40e_hw *hw = &pf->hw;
5720         struct i40e_vf *vf;
5721         u16 vf_id;
5722
5723         dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
5724                 queue, qtx_ctl);
5725
5726         /* Queue belongs to VF, find the VF and issue VF reset */
5727         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
5728             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
5729                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
5730                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
5731                 vf_id -= hw->func_caps.vf_base_id;
5732                 vf = &pf->vf[vf_id];
5733                 i40e_vc_notify_vf_reset(vf);
5734                 /* Allow VF to process pending reset notification */
5735                 msleep(20);
5736                 i40e_reset_vf(vf, false);
5737         }
5738 }
5739
5740 /**
5741  * i40e_service_event_complete - Finish up the service event
5742  * @pf: board private structure
5743  **/
5744 static void i40e_service_event_complete(struct i40e_pf *pf)
5745 {
5746         WARN_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
5747
5748         /* flush memory to make sure state is correct before next watchog */
5749         smp_mb__before_atomic();
5750         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
5751 }
5752
5753 /**
5754  * i40e_get_cur_guaranteed_fd_count - Get the consumed guaranteed FD filters
5755  * @pf: board private structure
5756  **/
5757 u32 i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf)
5758 {
5759         u32 val, fcnt_prog;
5760
5761         val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
5762         fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK);
5763         return fcnt_prog;
5764 }
5765
5766 /**
5767  * i40e_get_current_fd_count - Get total FD filters programmed for this PF
5768  * @pf: board private structure
5769  **/
5770 u32 i40e_get_current_fd_count(struct i40e_pf *pf)
5771 {
5772         u32 val, fcnt_prog;
5773
5774         val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
5775         fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) +
5776                     ((val & I40E_PFQF_FDSTAT_BEST_CNT_MASK) >>
5777                       I40E_PFQF_FDSTAT_BEST_CNT_SHIFT);
5778         return fcnt_prog;
5779 }
5780
5781 /**
5782  * i40e_get_global_fd_count - Get total FD filters programmed on device
5783  * @pf: board private structure
5784  **/
5785 u32 i40e_get_global_fd_count(struct i40e_pf *pf)
5786 {
5787         u32 val, fcnt_prog;
5788
5789         val = rd32(&pf->hw, I40E_GLQF_FDCNT_0);
5790         fcnt_prog = (val & I40E_GLQF_FDCNT_0_GUARANT_CNT_MASK) +
5791                     ((val & I40E_GLQF_FDCNT_0_BESTCNT_MASK) >>
5792                      I40E_GLQF_FDCNT_0_BESTCNT_SHIFT);
5793         return fcnt_prog;
5794 }
5795
5796 /**
5797  * i40e_fdir_check_and_reenable - Function to reenabe FD ATR or SB if disabled
5798  * @pf: board private structure
5799  **/
5800 void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
5801 {
5802         struct i40e_fdir_filter *filter;
5803         u32 fcnt_prog, fcnt_avail;
5804         struct hlist_node *node;
5805
5806         if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
5807                 return;
5808
5809         /* Check if, FD SB or ATR was auto disabled and if there is enough room
5810          * to re-enable
5811          */
5812         fcnt_prog = i40e_get_global_fd_count(pf);
5813         fcnt_avail = pf->fdir_pf_filter_count;
5814         if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM)) ||
5815             (pf->fd_add_err == 0) ||
5816             (i40e_get_current_atr_cnt(pf) < pf->fd_atr_cnt)) {
5817                 if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
5818                     (pf->auto_disable_flags & I40E_FLAG_FD_SB_ENABLED)) {
5819                         pf->auto_disable_flags &= ~I40E_FLAG_FD_SB_ENABLED;
5820                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
5821                                 dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n");
5822                 }
5823         }
5824         /* Wait for some more space to be available to turn on ATR */
5825         if (fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM * 2)) {
5826                 if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
5827                     (pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED)) {
5828                         pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
5829                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
5830                                 dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table now\n");
5831                 }
5832         }
5833
5834         /* if hw had a problem adding a filter, delete it */
5835         if (pf->fd_inv > 0) {
5836                 hlist_for_each_entry_safe(filter, node,
5837                                           &pf->fdir_filter_list, fdir_node) {
5838                         if (filter->fd_id == pf->fd_inv) {
5839                                 hlist_del(&filter->fdir_node);
5840                                 kfree(filter);
5841                                 pf->fdir_pf_active_filters--;
5842                         }
5843                 }
5844         }
5845 }
5846
5847 #define I40E_MIN_FD_FLUSH_INTERVAL 10
5848 #define I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE 30
5849 /**
5850  * i40e_fdir_flush_and_replay - Function to flush all FD filters and replay SB
5851  * @pf: board private structure
5852  **/
5853 static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
5854 {
5855         unsigned long min_flush_time;
5856         int flush_wait_retry = 50;
5857         bool disable_atr = false;
5858         int fd_room;
5859         int reg;
5860
5861         if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
5862                 return;
5863
5864         if (!time_after(jiffies, pf->fd_flush_timestamp +
5865                                  (I40E_MIN_FD_FLUSH_INTERVAL * HZ)))
5866                 return;
5867
5868         /* If the flush is happening too quick and we have mostly SB rules we
5869          * should not re-enable ATR for some time.
5870          */
5871         min_flush_time = pf->fd_flush_timestamp +
5872                          (I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE * HZ);
5873         fd_room = pf->fdir_pf_filter_count - pf->fdir_pf_active_filters;
5874
5875         if (!(time_after(jiffies, min_flush_time)) &&
5876             (fd_room < I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) {
5877                 if (I40E_DEBUG_FD & pf->hw.debug_mask)
5878                         dev_info(&pf->pdev->dev, "ATR disabled, not enough FD filter space.\n");
5879                 disable_atr = true;
5880         }
5881
5882         pf->fd_flush_timestamp = jiffies;
5883         pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
5884         /* flush all filters */
5885         wr32(&pf->hw, I40E_PFQF_CTL_1,
5886              I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
5887         i40e_flush(&pf->hw);
5888         pf->fd_flush_cnt++;
5889         pf->fd_add_err = 0;
5890         do {
5891                 /* Check FD flush status every 5-6msec */
5892                 usleep_range(5000, 6000);
5893                 reg = rd32(&pf->hw, I40E_PFQF_CTL_1);
5894                 if (!(reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK))
5895                         break;
5896         } while (flush_wait_retry--);
5897         if (reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK) {
5898                 dev_warn(&pf->pdev->dev, "FD table did not flush, needs more time\n");
5899         } else {
5900                 /* replay sideband filters */
5901                 i40e_fdir_filter_restore(pf->vsi[pf->lan_vsi]);
5902                 if (!disable_atr)
5903                         pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
5904                 clear_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state);
5905                 if (I40E_DEBUG_FD & pf->hw.debug_mask)
5906                         dev_info(&pf->pdev->dev, "FD Filter table flushed and FD-SB replayed.\n");
5907         }
5908
5909 }
5910
5911 /**
5912  * i40e_get_current_atr_count - Get the count of total FD ATR filters programmed
5913  * @pf: board private structure
5914  **/
5915 u32 i40e_get_current_atr_cnt(struct i40e_pf *pf)
5916 {
5917         return i40e_get_current_fd_count(pf) - pf->fdir_pf_active_filters;
5918 }
5919
5920 /* We can see up to 256 filter programming desc in transit if the filters are
5921  * being applied really fast; before we see the first
5922  * filter miss error on Rx queue 0. Accumulating enough error messages before
5923  * reacting will make sure we don't cause flush too often.
5924  */
5925 #define I40E_MAX_FD_PROGRAM_ERROR 256
5926
5927 /**
5928  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
5929  * @pf: board private structure
5930  **/
5931 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
5932 {
5933
5934         /* if interface is down do nothing */
5935         if (test_bit(__I40E_DOWN, &pf->state))
5936                 return;
5937
5938         if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
5939                 return;
5940
5941         if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
5942                 i40e_fdir_flush_and_replay(pf);
5943
5944         i40e_fdir_check_and_reenable(pf);
5945
5946 }
5947
5948 /**
5949  * i40e_vsi_link_event - notify VSI of a link event
5950  * @vsi: vsi to be notified
5951  * @link_up: link up or down
5952  **/
5953 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
5954 {
5955         if (!vsi || test_bit(__I40E_DOWN, &vsi->state))
5956                 return;
5957
5958         switch (vsi->type) {
5959         case I40E_VSI_MAIN:
5960 #ifdef I40E_FCOE
5961         case I40E_VSI_FCOE:
5962 #endif
5963                 if (!vsi->netdev || !vsi->netdev_registered)
5964                         break;
5965
5966                 if (link_up) {
5967                         netif_carrier_on(vsi->netdev);
5968                         netif_tx_wake_all_queues(vsi->netdev);
5969                 } else {
5970                         netif_carrier_off(vsi->netdev);
5971                         netif_tx_stop_all_queues(vsi->netdev);
5972                 }
5973                 break;
5974
5975         case I40E_VSI_SRIOV:
5976         case I40E_VSI_VMDQ2:
5977         case I40E_VSI_CTRL:
5978         case I40E_VSI_MIRROR:
5979         default:
5980                 /* there is no notification for other VSIs */
5981                 break;
5982         }
5983 }
5984
5985 /**
5986  * i40e_veb_link_event - notify elements on the veb of a link event
5987  * @veb: veb to be notified
5988  * @link_up: link up or down
5989  **/
5990 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
5991 {
5992         struct i40e_pf *pf;
5993         int i;
5994
5995         if (!veb || !veb->pf)
5996                 return;
5997         pf = veb->pf;
5998
5999         /* depth first... */
6000         for (i = 0; i < I40E_MAX_VEB; i++)
6001                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
6002                         i40e_veb_link_event(pf->veb[i], link_up);
6003
6004         /* ... now the local VSIs */
6005         for (i = 0; i < pf->num_alloc_vsi; i++)
6006                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
6007                         i40e_vsi_link_event(pf->vsi[i], link_up);
6008 }
6009
6010 /**
6011  * i40e_link_event - Update netif_carrier status
6012  * @pf: board private structure
6013  **/
6014 static void i40e_link_event(struct i40e_pf *pf)
6015 {
6016         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6017         u8 new_link_speed, old_link_speed;
6018         i40e_status status;
6019         bool new_link, old_link;
6020
6021         /* save off old link status information */
6022         pf->hw.phy.link_info_old = pf->hw.phy.link_info;
6023
6024         /* set this to force the get_link_status call to refresh state */
6025         pf->hw.phy.get_link_info = true;
6026
6027         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
6028
6029         status = i40e_get_link_status(&pf->hw, &new_link);
6030         if (status) {
6031                 dev_dbg(&pf->pdev->dev, "couldn't get link state, status: %d\n",
6032                         status);
6033                 return;
6034         }
6035
6036         old_link_speed = pf->hw.phy.link_info_old.link_speed;
6037         new_link_speed = pf->hw.phy.link_info.link_speed;
6038
6039         if (new_link == old_link &&
6040             new_link_speed == old_link_speed &&
6041             (test_bit(__I40E_DOWN, &vsi->state) ||
6042              new_link == netif_carrier_ok(vsi->netdev)))
6043                 return;
6044
6045         if (!test_bit(__I40E_DOWN, &vsi->state))
6046                 i40e_print_link_message(vsi, new_link);
6047
6048         /* Notify the base of the switch tree connected to
6049          * the link.  Floating VEBs are not notified.
6050          */
6051         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
6052                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
6053         else
6054                 i40e_vsi_link_event(vsi, new_link);
6055
6056         if (pf->vf)
6057                 i40e_vc_notify_link_state(pf);
6058
6059         if (pf->flags & I40E_FLAG_PTP)
6060                 i40e_ptp_set_increment(pf);
6061 }
6062
6063 /**
6064  * i40e_watchdog_subtask - periodic checks not using event driven response
6065  * @pf: board private structure
6066  **/
6067 static void i40e_watchdog_subtask(struct i40e_pf *pf)
6068 {
6069         int i;
6070
6071         /* if interface is down do nothing */
6072         if (test_bit(__I40E_DOWN, &pf->state) ||
6073             test_bit(__I40E_CONFIG_BUSY, &pf->state))
6074                 return;
6075
6076         /* make sure we don't do these things too often */
6077         if (time_before(jiffies, (pf->service_timer_previous +
6078                                   pf->service_timer_period)))
6079                 return;
6080         pf->service_timer_previous = jiffies;
6081
6082         if (pf->flags & I40E_FLAG_LINK_POLLING_ENABLED)
6083                 i40e_link_event(pf);
6084
6085         /* Update the stats for active netdevs so the network stack
6086          * can look at updated numbers whenever it cares to
6087          */
6088         for (i = 0; i < pf->num_alloc_vsi; i++)
6089                 if (pf->vsi[i] && pf->vsi[i]->netdev)
6090                         i40e_update_stats(pf->vsi[i]);
6091
6092         if (pf->flags & I40E_FLAG_VEB_STATS_ENABLED) {
6093                 /* Update the stats for the active switching components */
6094                 for (i = 0; i < I40E_MAX_VEB; i++)
6095                         if (pf->veb[i])
6096                                 i40e_update_veb_stats(pf->veb[i]);
6097         }
6098
6099         i40e_ptp_rx_hang(pf->vsi[pf->lan_vsi]);
6100 }
6101
6102 /**
6103  * i40e_reset_subtask - Set up for resetting the device and driver
6104  * @pf: board private structure
6105  **/
6106 static void i40e_reset_subtask(struct i40e_pf *pf)
6107 {
6108         u32 reset_flags = 0;
6109
6110         rtnl_lock();
6111         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
6112                 reset_flags |= BIT_ULL(__I40E_REINIT_REQUESTED);
6113                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
6114         }
6115         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
6116                 reset_flags |= BIT_ULL(__I40E_PF_RESET_REQUESTED);
6117                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
6118         }
6119         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
6120                 reset_flags |= BIT_ULL(__I40E_CORE_RESET_REQUESTED);
6121                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
6122         }
6123         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
6124                 reset_flags |= BIT_ULL(__I40E_GLOBAL_RESET_REQUESTED);
6125                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
6126         }
6127         if (test_bit(__I40E_DOWN_REQUESTED, &pf->state)) {
6128                 reset_flags |= BIT_ULL(__I40E_DOWN_REQUESTED);
6129                 clear_bit(__I40E_DOWN_REQUESTED, &pf->state);
6130         }
6131
6132         /* If there's a recovery already waiting, it takes
6133          * precedence before starting a new reset sequence.
6134          */
6135         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
6136                 i40e_handle_reset_warning(pf);
6137                 goto unlock;
6138         }
6139
6140         /* If we're already down or resetting, just bail */
6141         if (reset_flags &&
6142             !test_bit(__I40E_DOWN, &pf->state) &&
6143             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
6144                 i40e_do_reset(pf, reset_flags);
6145
6146 unlock:
6147         rtnl_unlock();
6148 }
6149
6150 /**
6151  * i40e_handle_link_event - Handle link event
6152  * @pf: board private structure
6153  * @e: event info posted on ARQ
6154  **/
6155 static void i40e_handle_link_event(struct i40e_pf *pf,
6156                                    struct i40e_arq_event_info *e)
6157 {
6158         struct i40e_aqc_get_link_status *status =
6159                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
6160
6161         /* Do a new status request to re-enable LSE reporting
6162          * and load new status information into the hw struct
6163          * This completely ignores any state information
6164          * in the ARQ event info, instead choosing to always
6165          * issue the AQ update link status command.
6166          */
6167         i40e_link_event(pf);
6168
6169         /* check for unqualified module, if link is down */
6170         if ((status->link_info & I40E_AQ_MEDIA_AVAILABLE) &&
6171             (!(status->an_info & I40E_AQ_QUALIFIED_MODULE)) &&
6172             (!(status->link_info & I40E_AQ_LINK_UP)))
6173                 dev_err(&pf->pdev->dev,
6174                         "The driver failed to link because an unqualified module was detected.\n");
6175 }
6176
6177 /**
6178  * i40e_clean_adminq_subtask - Clean the AdminQ rings
6179  * @pf: board private structure
6180  **/
6181 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
6182 {
6183         struct i40e_arq_event_info event;
6184         struct i40e_hw *hw = &pf->hw;
6185         u16 pending, i = 0;
6186         i40e_status ret;
6187         u16 opcode;
6188         u32 oldval;
6189         u32 val;
6190
6191         /* Do not run clean AQ when PF reset fails */
6192         if (test_bit(__I40E_RESET_FAILED, &pf->state))
6193                 return;
6194
6195         /* check for error indications */
6196         val = rd32(&pf->hw, pf->hw.aq.arq.len);
6197         oldval = val;
6198         if (val & I40E_PF_ARQLEN_ARQVFE_MASK) {
6199                 dev_info(&pf->pdev->dev, "ARQ VF Error detected\n");
6200                 val &= ~I40E_PF_ARQLEN_ARQVFE_MASK;
6201         }
6202         if (val & I40E_PF_ARQLEN_ARQOVFL_MASK) {
6203                 dev_info(&pf->pdev->dev, "ARQ Overflow Error detected\n");
6204                 val &= ~I40E_PF_ARQLEN_ARQOVFL_MASK;
6205         }
6206         if (val & I40E_PF_ARQLEN_ARQCRIT_MASK) {
6207                 dev_info(&pf->pdev->dev, "ARQ Critical Error detected\n");
6208                 val &= ~I40E_PF_ARQLEN_ARQCRIT_MASK;
6209         }
6210         if (oldval != val)
6211                 wr32(&pf->hw, pf->hw.aq.arq.len, val);
6212
6213         val = rd32(&pf->hw, pf->hw.aq.asq.len);
6214         oldval = val;
6215         if (val & I40E_PF_ATQLEN_ATQVFE_MASK) {
6216                 dev_info(&pf->pdev->dev, "ASQ VF Error detected\n");
6217                 val &= ~I40E_PF_ATQLEN_ATQVFE_MASK;
6218         }
6219         if (val & I40E_PF_ATQLEN_ATQOVFL_MASK) {
6220                 dev_info(&pf->pdev->dev, "ASQ Overflow Error detected\n");
6221                 val &= ~I40E_PF_ATQLEN_ATQOVFL_MASK;
6222         }
6223         if (val & I40E_PF_ATQLEN_ATQCRIT_MASK) {
6224                 dev_info(&pf->pdev->dev, "ASQ Critical Error detected\n");
6225                 val &= ~I40E_PF_ATQLEN_ATQCRIT_MASK;
6226         }
6227         if (oldval != val)
6228                 wr32(&pf->hw, pf->hw.aq.asq.len, val);
6229
6230         event.buf_len = I40E_MAX_AQ_BUF_SIZE;
6231         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
6232         if (!event.msg_buf)
6233                 return;
6234
6235         do {
6236                 ret = i40e_clean_arq_element(hw, &event, &pending);
6237                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK)
6238                         break;
6239                 else if (ret) {
6240                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
6241                         break;
6242                 }
6243
6244                 opcode = le16_to_cpu(event.desc.opcode);
6245                 switch (opcode) {
6246
6247                 case i40e_aqc_opc_get_link_status:
6248                         i40e_handle_link_event(pf, &event);
6249                         break;
6250                 case i40e_aqc_opc_send_msg_to_pf:
6251                         ret = i40e_vc_process_vf_msg(pf,
6252                                         le16_to_cpu(event.desc.retval),
6253                                         le32_to_cpu(event.desc.cookie_high),
6254                                         le32_to_cpu(event.desc.cookie_low),
6255                                         event.msg_buf,
6256                                         event.msg_len);
6257                         break;
6258                 case i40e_aqc_opc_lldp_update_mib:
6259                         dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
6260 #ifdef CONFIG_I40E_DCB
6261                         rtnl_lock();
6262                         ret = i40e_handle_lldp_event(pf, &event);
6263                         rtnl_unlock();
6264 #endif /* CONFIG_I40E_DCB */
6265                         break;
6266                 case i40e_aqc_opc_event_lan_overflow:
6267                         dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
6268                         i40e_handle_lan_overflow_event(pf, &event);
6269                         break;
6270                 case i40e_aqc_opc_send_msg_to_peer:
6271                         dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
6272                         break;
6273                 case i40e_aqc_opc_nvm_erase:
6274                 case i40e_aqc_opc_nvm_update:
6275                         i40e_debug(&pf->hw, I40E_DEBUG_NVM, "ARQ NVM operation completed\n");
6276                         break;
6277                 default:
6278                         dev_info(&pf->pdev->dev,
6279                                  "ARQ Error: Unknown event 0x%04x received\n",
6280                                  opcode);
6281                         break;
6282                 }
6283         } while (pending && (i++ < pf->adminq_work_limit));
6284
6285         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
6286         /* re-enable Admin queue interrupt cause */
6287         val = rd32(hw, I40E_PFINT_ICR0_ENA);
6288         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
6289         wr32(hw, I40E_PFINT_ICR0_ENA, val);
6290         i40e_flush(hw);
6291
6292         kfree(event.msg_buf);
6293 }
6294
6295 /**
6296  * i40e_verify_eeprom - make sure eeprom is good to use
6297  * @pf: board private structure
6298  **/
6299 static void i40e_verify_eeprom(struct i40e_pf *pf)
6300 {
6301         int err;
6302
6303         err = i40e_diag_eeprom_test(&pf->hw);
6304         if (err) {
6305                 /* retry in case of garbage read */
6306                 err = i40e_diag_eeprom_test(&pf->hw);
6307                 if (err) {
6308                         dev_info(&pf->pdev->dev, "eeprom check failed (%d), Tx/Rx traffic disabled\n",
6309                                  err);
6310                         set_bit(__I40E_BAD_EEPROM, &pf->state);
6311                 }
6312         }
6313
6314         if (!err && test_bit(__I40E_BAD_EEPROM, &pf->state)) {
6315                 dev_info(&pf->pdev->dev, "eeprom check passed, Tx/Rx traffic enabled\n");
6316                 clear_bit(__I40E_BAD_EEPROM, &pf->state);
6317         }
6318 }
6319
6320 /**
6321  * i40e_enable_pf_switch_lb
6322  * @pf: pointer to the PF structure
6323  *
6324  * enable switch loop back or die - no point in a return value
6325  **/
6326 static void i40e_enable_pf_switch_lb(struct i40e_pf *pf)
6327 {
6328         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6329         struct i40e_vsi_context ctxt;
6330         int ret;
6331
6332         ctxt.seid = pf->main_vsi_seid;
6333         ctxt.pf_num = pf->hw.pf_id;
6334         ctxt.vf_num = 0;
6335         ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6336         if (ret) {
6337                 dev_info(&pf->pdev->dev,
6338                          "couldn't get PF vsi config, err %s aq_err %s\n",
6339                          i40e_stat_str(&pf->hw, ret),
6340                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6341                 return;
6342         }
6343         ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6344         ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6345         ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6346
6347         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
6348         if (ret) {
6349                 dev_info(&pf->pdev->dev,
6350                          "update vsi switch failed, err %s aq_err %s\n",
6351                          i40e_stat_str(&pf->hw, ret),
6352                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6353         }
6354 }
6355
6356 /**
6357  * i40e_disable_pf_switch_lb
6358  * @pf: pointer to the PF structure
6359  *
6360  * disable switch loop back or die - no point in a return value
6361  **/
6362 static void i40e_disable_pf_switch_lb(struct i40e_pf *pf)
6363 {
6364         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6365         struct i40e_vsi_context ctxt;
6366         int ret;
6367
6368         ctxt.seid = pf->main_vsi_seid;
6369         ctxt.pf_num = pf->hw.pf_id;
6370         ctxt.vf_num = 0;
6371         ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6372         if (ret) {
6373                 dev_info(&pf->pdev->dev,
6374                          "couldn't get PF vsi config, err %s aq_err %s\n",
6375                          i40e_stat_str(&pf->hw, ret),
6376                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6377                 return;
6378         }
6379         ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6380         ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6381         ctxt.info.switch_id &= ~cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6382
6383         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
6384         if (ret) {
6385                 dev_info(&pf->pdev->dev,
6386                          "update vsi switch failed, err %s aq_err %s\n",
6387                          i40e_stat_str(&pf->hw, ret),
6388                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6389         }
6390 }
6391
6392 /**
6393  * i40e_config_bridge_mode - Configure the HW bridge mode
6394  * @veb: pointer to the bridge instance
6395  *
6396  * Configure the loop back mode for the LAN VSI that is downlink to the
6397  * specified HW bridge instance. It is expected this function is called
6398  * when a new HW bridge is instantiated.
6399  **/
6400 static void i40e_config_bridge_mode(struct i40e_veb *veb)
6401 {
6402         struct i40e_pf *pf = veb->pf;
6403
6404         if (pf->hw.debug_mask & I40E_DEBUG_LAN)
6405                 dev_info(&pf->pdev->dev, "enabling bridge mode: %s\n",
6406                          veb->bridge_mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
6407         if (veb->bridge_mode & BRIDGE_MODE_VEPA)
6408                 i40e_disable_pf_switch_lb(pf);
6409         else
6410                 i40e_enable_pf_switch_lb(pf);
6411 }
6412
6413 /**
6414  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
6415  * @veb: pointer to the VEB instance
6416  *
6417  * This is a recursive function that first builds the attached VSIs then
6418  * recurses in to build the next layer of VEB.  We track the connections
6419  * through our own index numbers because the seid's from the HW could
6420  * change across the reset.
6421  **/
6422 static int i40e_reconstitute_veb(struct i40e_veb *veb)
6423 {
6424         struct i40e_vsi *ctl_vsi = NULL;
6425         struct i40e_pf *pf = veb->pf;
6426         int v, veb_idx;
6427         int ret;
6428
6429         /* build VSI that owns this VEB, temporarily attached to base VEB */
6430         for (v = 0; v < pf->num_alloc_vsi && !ctl_vsi; v++) {
6431                 if (pf->vsi[v] &&
6432                     pf->vsi[v]->veb_idx == veb->idx &&
6433                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
6434                         ctl_vsi = pf->vsi[v];
6435                         break;
6436                 }
6437         }
6438         if (!ctl_vsi) {
6439                 dev_info(&pf->pdev->dev,
6440                          "missing owner VSI for veb_idx %d\n", veb->idx);
6441                 ret = -ENOENT;
6442                 goto end_reconstitute;
6443         }
6444         if (ctl_vsi != pf->vsi[pf->lan_vsi])
6445                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
6446         ret = i40e_add_vsi(ctl_vsi);
6447         if (ret) {
6448                 dev_info(&pf->pdev->dev,
6449                          "rebuild of veb_idx %d owner VSI failed: %d\n",
6450                          veb->idx, ret);
6451                 goto end_reconstitute;
6452         }
6453         i40e_vsi_reset_stats(ctl_vsi);
6454
6455         /* create the VEB in the switch and move the VSI onto the VEB */
6456         ret = i40e_add_veb(veb, ctl_vsi);
6457         if (ret)
6458                 goto end_reconstitute;
6459
6460         if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
6461                 veb->bridge_mode = BRIDGE_MODE_VEB;
6462         else
6463                 veb->bridge_mode = BRIDGE_MODE_VEPA;
6464         i40e_config_bridge_mode(veb);
6465
6466         /* create the remaining VSIs attached to this VEB */
6467         for (v = 0; v < pf->num_alloc_vsi; v++) {
6468                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
6469                         continue;
6470
6471                 if (pf->vsi[v]->veb_idx == veb->idx) {
6472                         struct i40e_vsi *vsi = pf->vsi[v];
6473
6474                         vsi->uplink_seid = veb->seid;
6475                         ret = i40e_add_vsi(vsi);
6476                         if (ret) {
6477                                 dev_info(&pf->pdev->dev,
6478                                          "rebuild of vsi_idx %d failed: %d\n",
6479                                          v, ret);
6480                                 goto end_reconstitute;
6481                         }
6482                         i40e_vsi_reset_stats(vsi);
6483                 }
6484         }
6485
6486         /* create any VEBs attached to this VEB - RECURSION */
6487         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
6488                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
6489                         pf->veb[veb_idx]->uplink_seid = veb->seid;
6490                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
6491                         if (ret)
6492                                 break;
6493                 }
6494         }
6495
6496 end_reconstitute:
6497         return ret;
6498 }
6499
6500 /**
6501  * i40e_get_capabilities - get info about the HW
6502  * @pf: the PF struct
6503  **/
6504 static int i40e_get_capabilities(struct i40e_pf *pf)
6505 {
6506         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
6507         u16 data_size;
6508         int buf_len;
6509         int err;
6510
6511         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
6512         do {
6513                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
6514                 if (!cap_buf)
6515                         return -ENOMEM;
6516
6517                 /* this loads the data into the hw struct for us */
6518                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
6519                                             &data_size,
6520                                             i40e_aqc_opc_list_func_capabilities,
6521                                             NULL);
6522                 /* data loaded, buffer no longer needed */
6523                 kfree(cap_buf);
6524
6525                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
6526                         /* retry with a larger buffer */
6527                         buf_len = data_size;
6528                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
6529                         dev_info(&pf->pdev->dev,
6530                                  "capability discovery failed, err %s aq_err %s\n",
6531                                  i40e_stat_str(&pf->hw, err),
6532                                  i40e_aq_str(&pf->hw,
6533                                              pf->hw.aq.asq_last_status));
6534                         return -ENODEV;
6535                 }
6536         } while (err);
6537
6538         if (pf->hw.debug_mask & I40E_DEBUG_USER)
6539                 dev_info(&pf->pdev->dev,
6540                          "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
6541                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
6542                          pf->hw.func_caps.num_msix_vectors,
6543                          pf->hw.func_caps.num_msix_vectors_vf,
6544                          pf->hw.func_caps.fd_filters_guaranteed,
6545                          pf->hw.func_caps.fd_filters_best_effort,
6546                          pf->hw.func_caps.num_tx_qp,
6547                          pf->hw.func_caps.num_vsis);
6548
6549 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
6550                        + pf->hw.func_caps.num_vfs)
6551         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
6552                 dev_info(&pf->pdev->dev,
6553                          "got num_vsis %d, setting num_vsis to %d\n",
6554                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
6555                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
6556         }
6557
6558         return 0;
6559 }
6560
6561 static int i40e_vsi_clear(struct i40e_vsi *vsi);
6562
6563 /**
6564  * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
6565  * @pf: board private structure
6566  **/
6567 static void i40e_fdir_sb_setup(struct i40e_pf *pf)
6568 {
6569         struct i40e_vsi *vsi;
6570         int i;
6571
6572         /* quick workaround for an NVM issue that leaves a critical register
6573          * uninitialized
6574          */
6575         if (!rd32(&pf->hw, I40E_GLQF_HKEY(0))) {
6576                 static const u32 hkey[] = {
6577                         0xe640d33f, 0xcdfe98ab, 0x73fa7161, 0x0d7a7d36,
6578                         0xeacb7d61, 0xaa4f05b6, 0x9c5c89ed, 0xfc425ddb,
6579                         0xa4654832, 0xfc7461d4, 0x8f827619, 0xf5c63c21,
6580                         0x95b3a76d};
6581
6582                 for (i = 0; i <= I40E_GLQF_HKEY_MAX_INDEX; i++)
6583                         wr32(&pf->hw, I40E_GLQF_HKEY(i), hkey[i]);
6584         }
6585
6586         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
6587                 return;
6588
6589         /* find existing VSI and see if it needs configuring */
6590         vsi = NULL;
6591         for (i = 0; i < pf->num_alloc_vsi; i++) {
6592                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
6593                         vsi = pf->vsi[i];
6594                         break;
6595                 }
6596         }
6597
6598         /* create a new VSI if none exists */
6599         if (!vsi) {
6600                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR,
6601                                      pf->vsi[pf->lan_vsi]->seid, 0);
6602                 if (!vsi) {
6603                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
6604                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
6605                         return;
6606                 }
6607         }
6608
6609         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
6610 }
6611
6612 /**
6613  * i40e_fdir_teardown - release the Flow Director resources
6614  * @pf: board private structure
6615  **/
6616 static void i40e_fdir_teardown(struct i40e_pf *pf)
6617 {
6618         int i;
6619
6620         i40e_fdir_filter_exit(pf);
6621         for (i = 0; i < pf->num_alloc_vsi; i++) {
6622                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
6623                         i40e_vsi_release(pf->vsi[i]);
6624                         break;
6625                 }
6626         }
6627 }
6628
6629 /**
6630  * i40e_prep_for_reset - prep for the core to reset
6631  * @pf: board private structure
6632  *
6633  * Close up the VFs and other things in prep for PF Reset.
6634   **/
6635 static void i40e_prep_for_reset(struct i40e_pf *pf)
6636 {
6637         struct i40e_hw *hw = &pf->hw;
6638         i40e_status ret = 0;
6639         u32 v;
6640
6641         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
6642         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
6643                 return;
6644
6645         dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");
6646
6647         /* quiesce the VSIs and their queues that are not already DOWN */
6648         i40e_pf_quiesce_all_vsi(pf);
6649
6650         for (v = 0; v < pf->num_alloc_vsi; v++) {
6651                 if (pf->vsi[v])
6652                         pf->vsi[v]->seid = 0;
6653         }
6654
6655         i40e_shutdown_adminq(&pf->hw);
6656
6657         /* call shutdown HMC */
6658         if (hw->hmc.hmc_obj) {
6659                 ret = i40e_shutdown_lan_hmc(hw);
6660                 if (ret)
6661                         dev_warn(&pf->pdev->dev,
6662                                  "shutdown_lan_hmc failed: %d\n", ret);
6663         }
6664 }
6665
6666 /**
6667  * i40e_send_version - update firmware with driver version
6668  * @pf: PF struct
6669  */
6670 static void i40e_send_version(struct i40e_pf *pf)
6671 {
6672         struct i40e_driver_version dv;
6673
6674         dv.major_version = DRV_VERSION_MAJOR;
6675         dv.minor_version = DRV_VERSION_MINOR;
6676         dv.build_version = DRV_VERSION_BUILD;
6677         dv.subbuild_version = 0;
6678         strlcpy(dv.driver_string, DRV_VERSION, sizeof(dv.driver_string));
6679         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
6680 }
6681
6682 /**
6683  * i40e_reset_and_rebuild - reset and rebuild using a saved config
6684  * @pf: board private structure
6685  * @reinit: if the Main VSI needs to re-initialized.
6686  **/
6687 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
6688 {
6689         struct i40e_hw *hw = &pf->hw;
6690         u8 set_fc_aq_fail = 0;
6691         i40e_status ret;
6692         u32 val;
6693         u32 v;
6694
6695         /* Now we wait for GRST to settle out.
6696          * We don't have to delete the VEBs or VSIs from the hw switch
6697          * because the reset will make them disappear.
6698          */
6699         ret = i40e_pf_reset(hw);
6700         if (ret) {
6701                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
6702                 set_bit(__I40E_RESET_FAILED, &pf->state);
6703                 goto clear_recovery;
6704         }
6705         pf->pfr_count++;
6706
6707         if (test_bit(__I40E_DOWN, &pf->state))
6708                 goto clear_recovery;
6709         dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
6710
6711         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
6712         ret = i40e_init_adminq(&pf->hw);
6713         if (ret) {
6714                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, err %s aq_err %s\n",
6715                          i40e_stat_str(&pf->hw, ret),
6716                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6717                 goto clear_recovery;
6718         }
6719
6720         /* re-verify the eeprom if we just had an EMP reset */
6721         if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state))
6722                 i40e_verify_eeprom(pf);
6723
6724         i40e_clear_pxe_mode(hw);
6725         ret = i40e_get_capabilities(pf);
6726         if (ret)
6727                 goto end_core_reset;
6728
6729         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
6730                                 hw->func_caps.num_rx_qp,
6731                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
6732         if (ret) {
6733                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
6734                 goto end_core_reset;
6735         }
6736         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
6737         if (ret) {
6738                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
6739                 goto end_core_reset;
6740         }
6741
6742 #ifdef CONFIG_I40E_DCB
6743         ret = i40e_init_pf_dcb(pf);
6744         if (ret) {
6745                 dev_info(&pf->pdev->dev, "DCB init failed %d, disabled\n", ret);
6746                 pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
6747                 /* Continue without DCB enabled */
6748         }
6749 #endif /* CONFIG_I40E_DCB */
6750 #ifdef I40E_FCOE
6751         i40e_init_pf_fcoe(pf);
6752
6753 #endif
6754         /* do basic switch setup */
6755         ret = i40e_setup_pf_switch(pf, reinit);
6756         if (ret)
6757                 goto end_core_reset;
6758
6759         /* driver is only interested in link up/down and module qualification
6760          * reports from firmware
6761          */
6762         ret = i40e_aq_set_phy_int_mask(&pf->hw,
6763                                        I40E_AQ_EVENT_LINK_UPDOWN |
6764                                        I40E_AQ_EVENT_MODULE_QUAL_FAIL, NULL);
6765         if (ret)
6766                 dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
6767                          i40e_stat_str(&pf->hw, ret),
6768                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6769
6770         /* make sure our flow control settings are restored */
6771         ret = i40e_set_fc(&pf->hw, &set_fc_aq_fail, true);
6772         if (ret)
6773                 dev_dbg(&pf->pdev->dev, "setting flow control: ret = %s last_status = %s\n",
6774                         i40e_stat_str(&pf->hw, ret),
6775                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6776
6777         /* Rebuild the VSIs and VEBs that existed before reset.
6778          * They are still in our local switch element arrays, so only
6779          * need to rebuild the switch model in the HW.
6780          *
6781          * If there were VEBs but the reconstitution failed, we'll try
6782          * try to recover minimal use by getting the basic PF VSI working.
6783          */
6784         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
6785                 dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");
6786                 /* find the one VEB connected to the MAC, and find orphans */
6787                 for (v = 0; v < I40E_MAX_VEB; v++) {
6788                         if (!pf->veb[v])
6789                                 continue;
6790
6791                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
6792                             pf->veb[v]->uplink_seid == 0) {
6793                                 ret = i40e_reconstitute_veb(pf->veb[v]);
6794
6795                                 if (!ret)
6796                                         continue;
6797
6798                                 /* If Main VEB failed, we're in deep doodoo,
6799                                  * so give up rebuilding the switch and set up
6800                                  * for minimal rebuild of PF VSI.
6801                                  * If orphan failed, we'll report the error
6802                                  * but try to keep going.
6803                                  */
6804                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
6805                                         dev_info(&pf->pdev->dev,
6806                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
6807                                                  ret);
6808                                         pf->vsi[pf->lan_vsi]->uplink_seid
6809                                                                 = pf->mac_seid;
6810                                         break;
6811                                 } else if (pf->veb[v]->uplink_seid == 0) {
6812                                         dev_info(&pf->pdev->dev,
6813                                                  "rebuild of orphan VEB failed: %d\n",
6814                                                  ret);
6815                                 }
6816                         }
6817                 }
6818         }
6819
6820         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
6821                 dev_dbg(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
6822                 /* no VEB, so rebuild only the Main VSI */
6823                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
6824                 if (ret) {
6825                         dev_info(&pf->pdev->dev,
6826                                  "rebuild of Main VSI failed: %d\n", ret);
6827                         goto end_core_reset;
6828                 }
6829         }
6830
6831         /* Reconfigure hardware for allowing smaller MSS in the case
6832          * of TSO, so that we avoid the MDD being fired and causing
6833          * a reset in the case of small MSS+TSO.
6834          */
6835 #define I40E_REG_MSS          0x000E64DC
6836 #define I40E_REG_MSS_MIN_MASK 0x3FF0000
6837 #define I40E_64BYTE_MSS       0x400000
6838         val = rd32(hw, I40E_REG_MSS);
6839         if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
6840                 val &= ~I40E_REG_MSS_MIN_MASK;
6841                 val |= I40E_64BYTE_MSS;
6842                 wr32(hw, I40E_REG_MSS, val);
6843         }
6844
6845         if (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 33)) ||
6846             (pf->hw.aq.fw_maj_ver < 4)) {
6847                 msleep(75);
6848                 ret = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
6849                 if (ret)
6850                         dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
6851                                  i40e_stat_str(&pf->hw, ret),
6852                                  i40e_aq_str(&pf->hw,
6853                                              pf->hw.aq.asq_last_status));
6854         }
6855         /* reinit the misc interrupt */
6856         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
6857                 ret = i40e_setup_misc_vector(pf);
6858
6859         /* Add a filter to drop all Flow control frames from any VSI from being
6860          * transmitted. By doing so we stop a malicious VF from sending out
6861          * PAUSE or PFC frames and potentially controlling traffic for other
6862          * PF/VF VSIs.
6863          * The FW can still send Flow control frames if enabled.
6864          */
6865         i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
6866                                                        pf->main_vsi_seid);
6867
6868         /* restart the VSIs that were rebuilt and running before the reset */
6869         i40e_pf_unquiesce_all_vsi(pf);
6870
6871         if (pf->num_alloc_vfs) {
6872                 for (v = 0; v < pf->num_alloc_vfs; v++)
6873                         i40e_reset_vf(&pf->vf[v], true);
6874         }
6875
6876         /* tell the firmware that we're starting */
6877         i40e_send_version(pf);
6878
6879 end_core_reset:
6880         clear_bit(__I40E_RESET_FAILED, &pf->state);
6881 clear_recovery:
6882         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
6883 }
6884
6885 /**
6886  * i40e_handle_reset_warning - prep for the PF to reset, reset and rebuild
6887  * @pf: board private structure
6888  *
6889  * Close up the VFs and other things in prep for a Core Reset,
6890  * then get ready to rebuild the world.
6891  **/
6892 static void i40e_handle_reset_warning(struct i40e_pf *pf)
6893 {
6894         i40e_prep_for_reset(pf);
6895         i40e_reset_and_rebuild(pf, false);
6896 }
6897
6898 /**
6899  * i40e_handle_mdd_event
6900  * @pf: pointer to the PF structure
6901  *
6902  * Called from the MDD irq handler to identify possibly malicious vfs
6903  **/
6904 static void i40e_handle_mdd_event(struct i40e_pf *pf)
6905 {
6906         struct i40e_hw *hw = &pf->hw;
6907         bool mdd_detected = false;
6908         bool pf_mdd_detected = false;
6909         struct i40e_vf *vf;
6910         u32 reg;
6911         int i;
6912
6913         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
6914                 return;
6915
6916         /* find what triggered the MDD event */
6917         reg = rd32(hw, I40E_GL_MDET_TX);
6918         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
6919                 u8 pf_num = (reg & I40E_GL_MDET_TX_PF_NUM_MASK) >>
6920                                 I40E_GL_MDET_TX_PF_NUM_SHIFT;
6921                 u16 vf_num = (reg & I40E_GL_MDET_TX_VF_NUM_MASK) >>
6922                                 I40E_GL_MDET_TX_VF_NUM_SHIFT;
6923                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_MASK) >>
6924                                 I40E_GL_MDET_TX_EVENT_SHIFT;
6925                 u16 queue = ((reg & I40E_GL_MDET_TX_QUEUE_MASK) >>
6926                                 I40E_GL_MDET_TX_QUEUE_SHIFT) -
6927                                 pf->hw.func_caps.base_queue;
6928                 if (netif_msg_tx_err(pf))
6929                         dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on TX queue %d PF number 0x%02x VF number 0x%02x\n",
6930                                  event, queue, pf_num, vf_num);
6931                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
6932                 mdd_detected = true;
6933         }
6934         reg = rd32(hw, I40E_GL_MDET_RX);
6935         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
6936                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK) >>
6937                                 I40E_GL_MDET_RX_FUNCTION_SHIFT;
6938                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_MASK) >>
6939                                 I40E_GL_MDET_RX_EVENT_SHIFT;
6940                 u16 queue = ((reg & I40E_GL_MDET_RX_QUEUE_MASK) >>
6941                                 I40E_GL_MDET_RX_QUEUE_SHIFT) -
6942                                 pf->hw.func_caps.base_queue;
6943                 if (netif_msg_rx_err(pf))
6944                         dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
6945                                  event, queue, func);
6946                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
6947                 mdd_detected = true;
6948         }
6949
6950         if (mdd_detected) {
6951                 reg = rd32(hw, I40E_PF_MDET_TX);
6952                 if (reg & I40E_PF_MDET_TX_VALID_MASK) {
6953                         wr32(hw, I40E_PF_MDET_TX, 0xFFFF);
6954                         dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");
6955                         pf_mdd_detected = true;
6956                 }
6957                 reg = rd32(hw, I40E_PF_MDET_RX);
6958                 if (reg & I40E_PF_MDET_RX_VALID_MASK) {
6959                         wr32(hw, I40E_PF_MDET_RX, 0xFFFF);
6960                         dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n");
6961                         pf_mdd_detected = true;
6962                 }
6963                 /* Queue belongs to the PF, initiate a reset */
6964                 if (pf_mdd_detected) {
6965                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
6966                         i40e_service_event_schedule(pf);
6967                 }
6968         }
6969
6970         /* see if one of the VFs needs its hand slapped */
6971         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
6972                 vf = &(pf->vf[i]);
6973                 reg = rd32(hw, I40E_VP_MDET_TX(i));
6974                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
6975                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
6976                         vf->num_mdd_events++;
6977                         dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
6978                                  i);
6979                 }
6980
6981                 reg = rd32(hw, I40E_VP_MDET_RX(i));
6982                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
6983                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
6984                         vf->num_mdd_events++;
6985                         dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
6986                                  i);
6987                 }
6988
6989                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
6990                         dev_info(&pf->pdev->dev,
6991                                  "Too many MDD events on VF %d, disabled\n", i);
6992                         dev_info(&pf->pdev->dev,
6993                                  "Use PF Control I/F to re-enable the VF\n");
6994                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
6995                 }
6996         }
6997
6998         /* re-enable mdd interrupt cause */
6999         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
7000         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
7001         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
7002         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
7003         i40e_flush(hw);
7004 }
7005
7006 #ifdef CONFIG_I40E_VXLAN
7007 /**
7008  * i40e_sync_vxlan_filters_subtask - Sync the VSI filter list with HW
7009  * @pf: board private structure
7010  **/
7011 static void i40e_sync_vxlan_filters_subtask(struct i40e_pf *pf)
7012 {
7013         struct i40e_hw *hw = &pf->hw;
7014         i40e_status ret;
7015         __be16 port;
7016         int i;
7017
7018         if (!(pf->flags & I40E_FLAG_VXLAN_FILTER_SYNC))
7019                 return;
7020
7021         pf->flags &= ~I40E_FLAG_VXLAN_FILTER_SYNC;
7022
7023         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
7024                 if (pf->pending_vxlan_bitmap & BIT_ULL(i)) {
7025                         pf->pending_vxlan_bitmap &= ~BIT_ULL(i);
7026                         port = pf->vxlan_ports[i];
7027                         if (port)
7028                                 ret = i40e_aq_add_udp_tunnel(hw, ntohs(port),
7029                                                      I40E_AQC_TUNNEL_TYPE_VXLAN,
7030                                                      NULL, NULL);
7031                         else
7032                                 ret = i40e_aq_del_udp_tunnel(hw, i, NULL);
7033
7034                         if (ret) {
7035                                 dev_info(&pf->pdev->dev,
7036                                          "%s vxlan port %d, index %d failed, err %s aq_err %s\n",
7037                                          port ? "add" : "delete",
7038                                          ntohs(port), i,
7039                                          i40e_stat_str(&pf->hw, ret),
7040                                          i40e_aq_str(&pf->hw,
7041                                                     pf->hw.aq.asq_last_status));
7042                                 pf->vxlan_ports[i] = 0;
7043                         }
7044                 }
7045         }
7046 }
7047
7048 #endif
7049 /**
7050  * i40e_service_task - Run the driver's async subtasks
7051  * @work: pointer to work_struct containing our data
7052  **/
7053 static void i40e_service_task(struct work_struct *work)
7054 {
7055         struct i40e_pf *pf = container_of(work,
7056                                           struct i40e_pf,
7057                                           service_task);
7058         unsigned long start_time = jiffies;
7059
7060         /* don't bother with service tasks if a reset is in progress */
7061         if (test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
7062                 i40e_service_event_complete(pf);
7063                 return;
7064         }
7065
7066         i40e_detect_recover_hung(pf);
7067         i40e_reset_subtask(pf);
7068         i40e_handle_mdd_event(pf);
7069         i40e_vc_process_vflr_event(pf);
7070         i40e_watchdog_subtask(pf);
7071         i40e_fdir_reinit_subtask(pf);
7072         i40e_sync_filters_subtask(pf);
7073 #ifdef CONFIG_I40E_VXLAN
7074         i40e_sync_vxlan_filters_subtask(pf);
7075 #endif
7076         i40e_clean_adminq_subtask(pf);
7077
7078         i40e_service_event_complete(pf);
7079
7080         /* If the tasks have taken longer than one timer cycle or there
7081          * is more work to be done, reschedule the service task now
7082          * rather than wait for the timer to tick again.
7083          */
7084         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
7085             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
7086             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
7087             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
7088                 i40e_service_event_schedule(pf);
7089 }
7090
7091 /**
7092  * i40e_service_timer - timer callback
7093  * @data: pointer to PF struct
7094  **/
7095 static void i40e_service_timer(unsigned long data)
7096 {
7097         struct i40e_pf *pf = (struct i40e_pf *)data;
7098
7099         mod_timer(&pf->service_timer,
7100                   round_jiffies(jiffies + pf->service_timer_period));
7101         i40e_service_event_schedule(pf);
7102 }
7103
7104 /**
7105  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
7106  * @vsi: the VSI being configured
7107  **/
7108 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
7109 {
7110         struct i40e_pf *pf = vsi->back;
7111
7112         switch (vsi->type) {
7113         case I40E_VSI_MAIN:
7114                 vsi->alloc_queue_pairs = pf->num_lan_qps;
7115                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7116                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7117                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
7118                         vsi->num_q_vectors = pf->num_lan_msix;
7119                 else
7120                         vsi->num_q_vectors = 1;
7121
7122                 break;
7123
7124         case I40E_VSI_FDIR:
7125                 vsi->alloc_queue_pairs = 1;
7126                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
7127                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7128                 vsi->num_q_vectors = 1;
7129                 break;
7130
7131         case I40E_VSI_VMDQ2:
7132                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
7133                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7134                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7135                 vsi->num_q_vectors = pf->num_vmdq_msix;
7136                 break;
7137
7138         case I40E_VSI_SRIOV:
7139                 vsi->alloc_queue_pairs = pf->num_vf_qps;
7140                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7141                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7142                 break;
7143
7144 #ifdef I40E_FCOE
7145         case I40E_VSI_FCOE:
7146                 vsi->alloc_queue_pairs = pf->num_fcoe_qps;
7147                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7148                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7149                 vsi->num_q_vectors = pf->num_fcoe_msix;
7150                 break;
7151
7152 #endif /* I40E_FCOE */
7153         default:
7154                 WARN_ON(1);
7155                 return -ENODATA;
7156         }
7157
7158         return 0;
7159 }
7160
7161 /**
7162  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
7163  * @type: VSI pointer
7164  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
7165  *
7166  * On error: returns error code (negative)
7167  * On success: returns 0
7168  **/
7169 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
7170 {
7171         int size;
7172         int ret = 0;
7173
7174         /* allocate memory for both Tx and Rx ring pointers */
7175         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
7176         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
7177         if (!vsi->tx_rings)
7178                 return -ENOMEM;
7179         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
7180
7181         if (alloc_qvectors) {
7182                 /* allocate memory for q_vector pointers */
7183                 size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
7184                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
7185                 if (!vsi->q_vectors) {
7186                         ret = -ENOMEM;
7187                         goto err_vectors;
7188                 }
7189         }
7190         return ret;
7191
7192 err_vectors:
7193         kfree(vsi->tx_rings);
7194         return ret;
7195 }
7196
7197 /**
7198  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
7199  * @pf: board private structure
7200  * @type: type of VSI
7201  *
7202  * On error: returns error code (negative)
7203  * On success: returns vsi index in PF (positive)
7204  **/
7205 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
7206 {
7207         int ret = -ENODEV;
7208         struct i40e_vsi *vsi;
7209         int vsi_idx;
7210         int i;
7211
7212         /* Need to protect the allocation of the VSIs at the PF level */
7213         mutex_lock(&pf->switch_mutex);
7214
7215         /* VSI list may be fragmented if VSI creation/destruction has
7216          * been happening.  We can afford to do a quick scan to look
7217          * for any free VSIs in the list.
7218          *
7219          * find next empty vsi slot, looping back around if necessary
7220          */
7221         i = pf->next_vsi;
7222         while (i < pf->num_alloc_vsi && pf->vsi[i])
7223                 i++;
7224         if (i >= pf->num_alloc_vsi) {
7225                 i = 0;
7226                 while (i < pf->next_vsi && pf->vsi[i])
7227                         i++;
7228         }
7229
7230         if (i < pf->num_alloc_vsi && !pf->vsi[i]) {
7231                 vsi_idx = i;             /* Found one! */
7232         } else {
7233                 ret = -ENODEV;
7234                 goto unlock_pf;  /* out of VSI slots! */
7235         }
7236         pf->next_vsi = ++i;
7237
7238         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
7239         if (!vsi) {
7240                 ret = -ENOMEM;
7241                 goto unlock_pf;
7242         }
7243         vsi->type = type;
7244         vsi->back = pf;
7245         set_bit(__I40E_DOWN, &vsi->state);
7246         vsi->flags = 0;
7247         vsi->idx = vsi_idx;
7248         vsi->rx_itr_setting = pf->rx_itr_default;
7249         vsi->tx_itr_setting = pf->tx_itr_default;
7250         vsi->int_rate_limit = 0;
7251         vsi->rss_table_size = (vsi->type == I40E_VSI_MAIN) ?
7252                                 pf->rss_table_size : 64;
7253         vsi->netdev_registered = false;
7254         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
7255         INIT_LIST_HEAD(&vsi->mac_filter_list);
7256         vsi->irqs_ready = false;
7257
7258         ret = i40e_set_num_rings_in_vsi(vsi);
7259         if (ret)
7260                 goto err_rings;
7261
7262         ret = i40e_vsi_alloc_arrays(vsi, true);
7263         if (ret)
7264                 goto err_rings;
7265
7266         /* Setup default MSIX irq handler for VSI */
7267         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
7268
7269         /* Initialize VSI lock */
7270         spin_lock_init(&vsi->mac_filter_list_lock);
7271         pf->vsi[vsi_idx] = vsi;
7272         ret = vsi_idx;
7273         goto unlock_pf;
7274
7275 err_rings:
7276         pf->next_vsi = i - 1;
7277         kfree(vsi);
7278 unlock_pf:
7279         mutex_unlock(&pf->switch_mutex);
7280         return ret;
7281 }
7282
7283 /**
7284  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
7285  * @type: VSI pointer
7286  * @free_qvectors: a bool to specify if q_vectors need to be freed.
7287  *
7288  * On error: returns error code (negative)
7289  * On success: returns 0
7290  **/
7291 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
7292 {
7293         /* free the ring and vector containers */
7294         if (free_qvectors) {
7295                 kfree(vsi->q_vectors);
7296                 vsi->q_vectors = NULL;
7297         }
7298         kfree(vsi->tx_rings);
7299         vsi->tx_rings = NULL;
7300         vsi->rx_rings = NULL;
7301 }
7302
7303 /**
7304  * i40e_vsi_clear - Deallocate the VSI provided
7305  * @vsi: the VSI being un-configured
7306  **/
7307 static int i40e_vsi_clear(struct i40e_vsi *vsi)
7308 {
7309         struct i40e_pf *pf;
7310
7311         if (!vsi)
7312                 return 0;
7313
7314         if (!vsi->back)
7315                 goto free_vsi;
7316         pf = vsi->back;
7317
7318         mutex_lock(&pf->switch_mutex);
7319         if (!pf->vsi[vsi->idx]) {
7320                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
7321                         vsi->idx, vsi->idx, vsi, vsi->type);
7322                 goto unlock_vsi;
7323         }
7324
7325         if (pf->vsi[vsi->idx] != vsi) {
7326                 dev_err(&pf->pdev->dev,
7327                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
7328                         pf->vsi[vsi->idx]->idx,
7329                         pf->vsi[vsi->idx],
7330                         pf->vsi[vsi->idx]->type,
7331                         vsi->idx, vsi, vsi->type);
7332                 goto unlock_vsi;
7333         }
7334
7335         /* updates the PF for this cleared vsi */
7336         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
7337         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
7338
7339         i40e_vsi_free_arrays(vsi, true);
7340
7341         pf->vsi[vsi->idx] = NULL;
7342         if (vsi->idx < pf->next_vsi)
7343                 pf->next_vsi = vsi->idx;
7344
7345 unlock_vsi:
7346         mutex_unlock(&pf->switch_mutex);
7347 free_vsi:
7348         kfree(vsi);
7349
7350         return 0;
7351 }
7352
7353 /**
7354  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
7355  * @vsi: the VSI being cleaned
7356  **/
7357 static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
7358 {
7359         int i;
7360
7361         if (vsi->tx_rings && vsi->tx_rings[0]) {
7362                 for (i = 0; i < vsi->alloc_queue_pairs; i++) {
7363                         kfree_rcu(vsi->tx_rings[i], rcu);
7364                         vsi->tx_rings[i] = NULL;
7365                         vsi->rx_rings[i] = NULL;
7366                 }
7367         }
7368 }
7369
7370 /**
7371  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
7372  * @vsi: the VSI being configured
7373  **/
7374 static int i40e_alloc_rings(struct i40e_vsi *vsi)
7375 {
7376         struct i40e_ring *tx_ring, *rx_ring;
7377         struct i40e_pf *pf = vsi->back;
7378         int i;
7379
7380         /* Set basic values in the rings to be used later during open() */
7381         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
7382                 /* allocate space for both Tx and Rx in one shot */
7383                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
7384                 if (!tx_ring)
7385                         goto err_out;
7386
7387                 tx_ring->queue_index = i;
7388                 tx_ring->reg_idx = vsi->base_queue + i;
7389                 tx_ring->ring_active = false;
7390                 tx_ring->vsi = vsi;
7391                 tx_ring->netdev = vsi->netdev;
7392                 tx_ring->dev = &pf->pdev->dev;
7393                 tx_ring->count = vsi->num_desc;
7394                 tx_ring->size = 0;
7395                 tx_ring->dcb_tc = 0;
7396                 if (vsi->back->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
7397                         tx_ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
7398                 if (vsi->back->flags & I40E_FLAG_OUTER_UDP_CSUM_CAPABLE)
7399                         tx_ring->flags |= I40E_TXR_FLAGS_OUTER_UDP_CSUM;
7400                 vsi->tx_rings[i] = tx_ring;
7401
7402                 rx_ring = &tx_ring[1];
7403                 rx_ring->queue_index = i;
7404                 rx_ring->reg_idx = vsi->base_queue + i;
7405                 rx_ring->ring_active = false;
7406                 rx_ring->vsi = vsi;
7407                 rx_ring->netdev = vsi->netdev;
7408                 rx_ring->dev = &pf->pdev->dev;
7409                 rx_ring->count = vsi->num_desc;
7410                 rx_ring->size = 0;
7411                 rx_ring->dcb_tc = 0;
7412                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
7413                         set_ring_16byte_desc_enabled(rx_ring);
7414                 else
7415                         clear_ring_16byte_desc_enabled(rx_ring);
7416                 vsi->rx_rings[i] = rx_ring;
7417         }
7418
7419         return 0;
7420
7421 err_out:
7422         i40e_vsi_clear_rings(vsi);
7423         return -ENOMEM;
7424 }
7425
7426 /**
7427  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
7428  * @pf: board private structure
7429  * @vectors: the number of MSI-X vectors to request
7430  *
7431  * Returns the number of vectors reserved, or error
7432  **/
7433 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
7434 {
7435         vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
7436                                         I40E_MIN_MSIX, vectors);
7437         if (vectors < 0) {
7438                 dev_info(&pf->pdev->dev,
7439                          "MSI-X vector reservation failed: %d\n", vectors);
7440                 vectors = 0;
7441         }
7442
7443         return vectors;
7444 }
7445
7446 /**
7447  * i40e_init_msix - Setup the MSIX capability
7448  * @pf: board private structure
7449  *
7450  * Work with the OS to set up the MSIX vectors needed.
7451  *
7452  * Returns the number of vectors reserved or negative on failure
7453  **/
7454 static int i40e_init_msix(struct i40e_pf *pf)
7455 {
7456         struct i40e_hw *hw = &pf->hw;
7457         int vectors_left;
7458         int v_budget, i;
7459         int v_actual;
7460
7461         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
7462                 return -ENODEV;
7463
7464         /* The number of vectors we'll request will be comprised of:
7465          *   - Add 1 for "other" cause for Admin Queue events, etc.
7466          *   - The number of LAN queue pairs
7467          *      - Queues being used for RSS.
7468          *              We don't need as many as max_rss_size vectors.
7469          *              use rss_size instead in the calculation since that
7470          *              is governed by number of cpus in the system.
7471          *      - assumes symmetric Tx/Rx pairing
7472          *   - The number of VMDq pairs
7473 #ifdef I40E_FCOE
7474          *   - The number of FCOE qps.
7475 #endif
7476          * Once we count this up, try the request.
7477          *
7478          * If we can't get what we want, we'll simplify to nearly nothing
7479          * and try again.  If that still fails, we punt.
7480          */
7481         vectors_left = hw->func_caps.num_msix_vectors;
7482         v_budget = 0;
7483
7484         /* reserve one vector for miscellaneous handler */
7485         if (vectors_left) {
7486                 v_budget++;
7487                 vectors_left--;
7488         }
7489
7490         /* reserve vectors for the main PF traffic queues */
7491         pf->num_lan_msix = min_t(int, num_online_cpus(), vectors_left);
7492         vectors_left -= pf->num_lan_msix;
7493         v_budget += pf->num_lan_msix;
7494
7495         /* reserve one vector for sideband flow director */
7496         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
7497                 if (vectors_left) {
7498                         v_budget++;
7499                         vectors_left--;
7500                 } else {
7501                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
7502                 }
7503         }
7504
7505 #ifdef I40E_FCOE
7506         /* can we reserve enough for FCoE? */
7507         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
7508                 if (!vectors_left)
7509                         pf->num_fcoe_msix = 0;
7510                 else if (vectors_left >= pf->num_fcoe_qps)
7511                         pf->num_fcoe_msix = pf->num_fcoe_qps;
7512                 else
7513                         pf->num_fcoe_msix = 1;
7514                 v_budget += pf->num_fcoe_msix;
7515                 vectors_left -= pf->num_fcoe_msix;
7516         }
7517
7518 #endif
7519         /* any vectors left over go for VMDq support */
7520         if (pf->flags & I40E_FLAG_VMDQ_ENABLED) {
7521                 int vmdq_vecs_wanted = pf->num_vmdq_vsis * pf->num_vmdq_qps;
7522                 int vmdq_vecs = min_t(int, vectors_left, vmdq_vecs_wanted);
7523
7524                 /* if we're short on vectors for what's desired, we limit
7525                  * the queues per vmdq.  If this is still more than are
7526                  * available, the user will need to change the number of
7527                  * queues/vectors used by the PF later with the ethtool
7528                  * channels command
7529                  */
7530                 if (vmdq_vecs < vmdq_vecs_wanted)
7531                         pf->num_vmdq_qps = 1;
7532                 pf->num_vmdq_msix = pf->num_vmdq_qps;
7533
7534                 v_budget += vmdq_vecs;
7535                 vectors_left -= vmdq_vecs;
7536         }
7537
7538         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
7539                                    GFP_KERNEL);
7540         if (!pf->msix_entries)
7541                 return -ENOMEM;
7542
7543         for (i = 0; i < v_budget; i++)
7544                 pf->msix_entries[i].entry = i;
7545         v_actual = i40e_reserve_msix_vectors(pf, v_budget);
7546
7547         if (v_actual != v_budget) {
7548                 /* If we have limited resources, we will start with no vectors
7549                  * for the special features and then allocate vectors to some
7550                  * of these features based on the policy and at the end disable
7551                  * the features that did not get any vectors.
7552                  */
7553 #ifdef I40E_FCOE
7554                 pf->num_fcoe_qps = 0;
7555                 pf->num_fcoe_msix = 0;
7556 #endif
7557                 pf->num_vmdq_msix = 0;
7558         }
7559
7560         if (v_actual < I40E_MIN_MSIX) {
7561                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
7562                 kfree(pf->msix_entries);
7563                 pf->msix_entries = NULL;
7564                 return -ENODEV;
7565
7566         } else if (v_actual == I40E_MIN_MSIX) {
7567                 /* Adjust for minimal MSIX use */
7568                 pf->num_vmdq_vsis = 0;
7569                 pf->num_vmdq_qps = 0;
7570                 pf->num_lan_qps = 1;
7571                 pf->num_lan_msix = 1;
7572
7573         } else if (v_actual != v_budget) {
7574                 int vec;
7575
7576                 /* reserve the misc vector */
7577                 vec = v_actual - 1;
7578
7579                 /* Scale vector usage down */
7580                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
7581                 pf->num_vmdq_vsis = 1;
7582                 pf->num_vmdq_qps = 1;
7583                 pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
7584
7585                 /* partition out the remaining vectors */
7586                 switch (vec) {
7587                 case 2:
7588                         pf->num_lan_msix = 1;
7589                         break;
7590                 case 3:
7591 #ifdef I40E_FCOE
7592                         /* give one vector to FCoE */
7593                         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
7594                                 pf->num_lan_msix = 1;
7595                                 pf->num_fcoe_msix = 1;
7596                         }
7597 #else
7598                         pf->num_lan_msix = 2;
7599 #endif
7600                         break;
7601                 default:
7602 #ifdef I40E_FCOE
7603                         /* give one vector to FCoE */
7604                         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
7605                                 pf->num_fcoe_msix = 1;
7606                                 vec--;
7607                         }
7608 #endif
7609                         /* give the rest to the PF */
7610                         pf->num_lan_msix = min_t(int, vec, pf->num_lan_qps);
7611                         break;
7612                 }
7613         }
7614
7615         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
7616             (pf->num_vmdq_msix == 0)) {
7617                 dev_info(&pf->pdev->dev, "VMDq disabled, not enough MSI-X vectors\n");
7618                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
7619         }
7620 #ifdef I40E_FCOE
7621
7622         if ((pf->flags & I40E_FLAG_FCOE_ENABLED) && (pf->num_fcoe_msix == 0)) {
7623                 dev_info(&pf->pdev->dev, "FCOE disabled, not enough MSI-X vectors\n");
7624                 pf->flags &= ~I40E_FLAG_FCOE_ENABLED;
7625         }
7626 #endif
7627         return v_actual;
7628 }
7629
7630 /**
7631  * i40e_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
7632  * @vsi: the VSI being configured
7633  * @v_idx: index of the vector in the vsi struct
7634  *
7635  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
7636  **/
7637 static int i40e_vsi_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
7638 {
7639         struct i40e_q_vector *q_vector;
7640
7641         /* allocate q_vector */
7642         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
7643         if (!q_vector)
7644                 return -ENOMEM;
7645
7646         q_vector->vsi = vsi;
7647         q_vector->v_idx = v_idx;
7648         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
7649         if (vsi->netdev)
7650                 netif_napi_add(vsi->netdev, &q_vector->napi,
7651                                i40e_napi_poll, NAPI_POLL_WEIGHT);
7652
7653         q_vector->rx.latency_range = I40E_LOW_LATENCY;
7654         q_vector->tx.latency_range = I40E_LOW_LATENCY;
7655
7656         /* tie q_vector and vsi together */
7657         vsi->q_vectors[v_idx] = q_vector;
7658
7659         return 0;
7660 }
7661
7662 /**
7663  * i40e_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
7664  * @vsi: the VSI being configured
7665  *
7666  * We allocate one q_vector per queue interrupt.  If allocation fails we
7667  * return -ENOMEM.
7668  **/
7669 static int i40e_vsi_alloc_q_vectors(struct i40e_vsi *vsi)
7670 {
7671         struct i40e_pf *pf = vsi->back;
7672         int v_idx, num_q_vectors;
7673         int err;
7674
7675         /* if not MSIX, give the one vector only to the LAN VSI */
7676         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
7677                 num_q_vectors = vsi->num_q_vectors;
7678         else if (vsi == pf->vsi[pf->lan_vsi])
7679                 num_q_vectors = 1;
7680         else
7681                 return -EINVAL;
7682
7683         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
7684                 err = i40e_vsi_alloc_q_vector(vsi, v_idx);
7685                 if (err)
7686                         goto err_out;
7687         }
7688
7689         return 0;
7690
7691 err_out:
7692         while (v_idx--)
7693                 i40e_free_q_vector(vsi, v_idx);
7694
7695         return err;
7696 }
7697
7698 /**
7699  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
7700  * @pf: board private structure to initialize
7701  **/
7702 static int i40e_init_interrupt_scheme(struct i40e_pf *pf)
7703 {
7704         int vectors = 0;
7705         ssize_t size;
7706
7707         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7708                 vectors = i40e_init_msix(pf);
7709                 if (vectors < 0) {
7710                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED   |
7711 #ifdef I40E_FCOE
7712                                        I40E_FLAG_FCOE_ENABLED   |
7713 #endif
7714                                        I40E_FLAG_RSS_ENABLED    |
7715                                        I40E_FLAG_DCB_CAPABLE    |
7716                                        I40E_FLAG_SRIOV_ENABLED  |
7717                                        I40E_FLAG_FD_SB_ENABLED  |
7718                                        I40E_FLAG_FD_ATR_ENABLED |
7719                                        I40E_FLAG_VMDQ_ENABLED);
7720
7721                         /* rework the queue expectations without MSIX */
7722                         i40e_determine_queue_usage(pf);
7723                 }
7724         }
7725
7726         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
7727             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
7728                 dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
7729                 vectors = pci_enable_msi(pf->pdev);
7730                 if (vectors < 0) {
7731                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n",
7732                                  vectors);
7733                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
7734                 }
7735                 vectors = 1;  /* one MSI or Legacy vector */
7736         }
7737
7738         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
7739                 dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");
7740
7741         /* set up vector assignment tracking */
7742         size = sizeof(struct i40e_lump_tracking) + (sizeof(u16) * vectors);
7743         pf->irq_pile = kzalloc(size, GFP_KERNEL);
7744         if (!pf->irq_pile) {
7745                 dev_err(&pf->pdev->dev, "error allocating irq_pile memory\n");
7746                 return -ENOMEM;
7747         }
7748         pf->irq_pile->num_entries = vectors;
7749         pf->irq_pile->search_hint = 0;
7750
7751         /* track first vector for misc interrupts, ignore return */
7752         (void)i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT - 1);
7753
7754         return 0;
7755 }
7756
7757 /**
7758  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
7759  * @pf: board private structure
7760  *
7761  * This sets up the handler for MSIX 0, which is used to manage the
7762  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
7763  * when in MSI or Legacy interrupt mode.
7764  **/
7765 static int i40e_setup_misc_vector(struct i40e_pf *pf)
7766 {
7767         struct i40e_hw *hw = &pf->hw;
7768         int err = 0;
7769
7770         /* Only request the irq if this is the first time through, and
7771          * not when we're rebuilding after a Reset
7772          */
7773         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
7774                 err = request_irq(pf->msix_entries[0].vector,
7775                                   i40e_intr, 0, pf->int_name, pf);
7776                 if (err) {
7777                         dev_info(&pf->pdev->dev,
7778                                  "request_irq for %s failed: %d\n",
7779                                  pf->int_name, err);
7780                         return -EFAULT;
7781                 }
7782         }
7783
7784         i40e_enable_misc_int_causes(pf);
7785
7786         /* associate no queues to the misc vector */
7787         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
7788         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
7789
7790         i40e_flush(hw);
7791
7792         i40e_irq_dynamic_enable_icr0(pf);
7793
7794         return err;
7795 }
7796
7797 /**
7798  * i40e_config_rss_aq - Prepare for RSS using AQ commands
7799  * @vsi: vsi structure
7800  * @seed: RSS hash seed
7801  **/
7802 static int i40e_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
7803                               u8 *lut, u16 lut_size)
7804 {
7805         struct i40e_aqc_get_set_rss_key_data rss_key;
7806         struct i40e_pf *pf = vsi->back;
7807         struct i40e_hw *hw = &pf->hw;
7808         bool pf_lut = false;
7809         u8 *rss_lut;
7810         int ret, i;
7811
7812         memset(&rss_key, 0, sizeof(rss_key));
7813         memcpy(&rss_key, seed, sizeof(rss_key));
7814
7815         rss_lut = kzalloc(pf->rss_table_size, GFP_KERNEL);
7816         if (!rss_lut)
7817                 return -ENOMEM;
7818
7819         /* Populate the LUT with max no. of queues in round robin fashion */
7820         for (i = 0; i < vsi->rss_table_size; i++)
7821                 rss_lut[i] = i % vsi->rss_size;
7822
7823         ret = i40e_aq_set_rss_key(hw, vsi->id, &rss_key);
7824         if (ret) {
7825                 dev_info(&pf->pdev->dev,
7826                          "Cannot set RSS key, err %s aq_err %s\n",
7827                          i40e_stat_str(&pf->hw, ret),
7828                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
7829                 goto config_rss_aq_out;
7830         }
7831
7832         if (vsi->type == I40E_VSI_MAIN)
7833                 pf_lut = true;
7834
7835         ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, rss_lut,
7836                                   vsi->rss_table_size);
7837         if (ret)
7838                 dev_info(&pf->pdev->dev,
7839                          "Cannot set RSS lut, err %s aq_err %s\n",
7840                          i40e_stat_str(&pf->hw, ret),
7841                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
7842
7843 config_rss_aq_out:
7844         kfree(rss_lut);
7845         return ret;
7846 }
7847
7848 /**
7849  * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
7850  * @vsi: VSI structure
7851  **/
7852 static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
7853 {
7854         u8 seed[I40E_HKEY_ARRAY_SIZE];
7855         struct i40e_pf *pf = vsi->back;
7856         u8 *lut;
7857         int ret;
7858
7859         if (!(pf->flags & I40E_FLAG_RSS_AQ_CAPABLE))
7860                 return 0;
7861
7862         lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
7863         if (!lut)
7864                 return -ENOMEM;
7865
7866         i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
7867         netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
7868         vsi->rss_size = min_t(int, pf->rss_size, vsi->num_queue_pairs);
7869         ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
7870         kfree(lut);
7871
7872         return ret;
7873 }
7874
7875 /**
7876  * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
7877  * @vsi: Pointer to vsi structure
7878  * @seed: RSS hash seed
7879  * @lut: Lookup table
7880  * @lut_size: Lookup table size
7881  *
7882  * Returns 0 on success, negative on failure
7883  **/
7884 static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
7885                                const u8 *lut, u16 lut_size)
7886 {
7887         struct i40e_pf *pf = vsi->back;
7888         struct i40e_hw *hw = &pf->hw;
7889         u8 i;
7890
7891         /* Fill out hash function seed */
7892         if (seed) {
7893                 u32 *seed_dw = (u32 *)seed;
7894
7895                 for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
7896                         wr32(hw, I40E_PFQF_HKEY(i), seed_dw[i]);
7897         }
7898
7899         if (lut) {
7900                 u32 *lut_dw = (u32 *)lut;
7901
7902                 if (lut_size != I40E_HLUT_ARRAY_SIZE)
7903                         return -EINVAL;
7904
7905                 for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
7906                         wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
7907         }
7908         i40e_flush(hw);
7909
7910         return 0;
7911 }
7912
7913 /**
7914  * i40e_get_rss_reg - Get the RSS keys and lut by reading registers
7915  * @vsi: Pointer to VSI structure
7916  * @seed: Buffer to store the keys
7917  * @lut: Buffer to store the lookup table entries
7918  * @lut_size: Size of buffer to store the lookup table entries
7919  *
7920  * Returns 0 on success, negative on failure
7921  */
7922 static int i40e_get_rss_reg(struct i40e_vsi *vsi, u8 *seed,
7923                             u8 *lut, u16 lut_size)
7924 {
7925         struct i40e_pf *pf = vsi->back;
7926         struct i40e_hw *hw = &pf->hw;
7927         u16 i;
7928
7929         if (seed) {
7930                 u32 *seed_dw = (u32 *)seed;
7931
7932                 for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
7933                         seed_dw[i] = rd32(hw, I40E_PFQF_HKEY(i));
7934         }
7935         if (lut) {
7936                 u32 *lut_dw = (u32 *)lut;
7937
7938                 if (lut_size != I40E_HLUT_ARRAY_SIZE)
7939                         return -EINVAL;
7940                 for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
7941                         lut_dw[i] = rd32(hw, I40E_PFQF_HLUT(i));
7942         }
7943
7944         return 0;
7945 }
7946
7947 /**
7948  * i40e_config_rss - Configure RSS keys and lut
7949  * @vsi: Pointer to VSI structure
7950  * @seed: RSS hash seed
7951  * @lut: Lookup table
7952  * @lut_size: Lookup table size
7953  *
7954  * Returns 0 on success, negative on failure
7955  */
7956 int i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
7957 {
7958         struct i40e_pf *pf = vsi->back;
7959
7960         if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE)
7961                 return i40e_config_rss_aq(vsi, seed, lut, lut_size);
7962         else
7963                 return i40e_config_rss_reg(vsi, seed, lut, lut_size);
7964 }
7965
7966 /**
7967  * i40e_get_rss - Get RSS keys and lut
7968  * @vsi: Pointer to VSI structure
7969  * @seed: Buffer to store the keys
7970  * @lut: Buffer to store the lookup table entries
7971  * lut_size: Size of buffer to store the lookup table entries
7972  *
7973  * Returns 0 on success, negative on failure
7974  */
7975 int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
7976 {
7977         return i40e_get_rss_reg(vsi, seed, lut, lut_size);
7978 }
7979
7980 /**
7981  * i40e_fill_rss_lut - Fill the RSS lookup table with default values
7982  * @pf: Pointer to board private structure
7983  * @lut: Lookup table
7984  * @rss_table_size: Lookup table size
7985  * @rss_size: Range of queue number for hashing
7986  */
7987 static void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
7988                               u16 rss_table_size, u16 rss_size)
7989 {
7990         u16 i;
7991
7992         for (i = 0; i < rss_table_size; i++)
7993                 lut[i] = i % rss_size;
7994 }
7995
7996 /**
7997  * i40e_pf_config_rss - Prepare for RSS if used
7998  * @pf: board private structure
7999  **/
8000 static int i40e_pf_config_rss(struct i40e_pf *pf)
8001 {
8002         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
8003         u8 seed[I40E_HKEY_ARRAY_SIZE];
8004         u8 *lut;
8005         struct i40e_hw *hw = &pf->hw;
8006         u32 reg_val;
8007         u64 hena;
8008         int ret;
8009
8010         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
8011         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
8012                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
8013         hena |= i40e_pf_get_default_rss_hena(pf);
8014
8015         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
8016         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
8017
8018         vsi->rss_size = min_t(int, pf->rss_size, vsi->num_queue_pairs);
8019
8020         /* Determine the RSS table size based on the hardware capabilities */
8021         reg_val = rd32(hw, I40E_PFQF_CTL_0);
8022         reg_val = (pf->rss_table_size == 512) ?
8023                         (reg_val | I40E_PFQF_CTL_0_HASHLUTSIZE_512) :
8024                         (reg_val & ~I40E_PFQF_CTL_0_HASHLUTSIZE_512);
8025         wr32(hw, I40E_PFQF_CTL_0, reg_val);
8026
8027         lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
8028         if (!lut)
8029                 return -ENOMEM;
8030
8031         i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
8032
8033         netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
8034         ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
8035
8036         kfree(lut);
8037
8038         return ret;
8039 }
8040
8041 /**
8042  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
8043  * @pf: board private structure
8044  * @queue_count: the requested queue count for rss.
8045  *
8046  * returns 0 if rss is not enabled, if enabled returns the final rss queue
8047  * count which may be different from the requested queue count.
8048  **/
8049 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
8050 {
8051         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
8052         int new_rss_size;
8053
8054         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
8055                 return 0;
8056
8057         new_rss_size = min_t(int, queue_count, pf->rss_size_max);
8058
8059         if (queue_count != vsi->num_queue_pairs) {
8060                 vsi->req_queue_pairs = queue_count;
8061                 i40e_prep_for_reset(pf);
8062
8063                 pf->rss_size = new_rss_size;
8064
8065                 i40e_reset_and_rebuild(pf, true);
8066                 i40e_pf_config_rss(pf);
8067         }
8068         dev_info(&pf->pdev->dev, "RSS count:  %d\n", pf->rss_size);
8069         return pf->rss_size;
8070 }
8071
8072 /**
8073  * i40e_get_npar_bw_setting - Retrieve BW settings for this PF partition
8074  * @pf: board private structure
8075  **/
8076 i40e_status i40e_get_npar_bw_setting(struct i40e_pf *pf)
8077 {
8078         i40e_status status;
8079         bool min_valid, max_valid;
8080         u32 max_bw, min_bw;
8081
8082         status = i40e_read_bw_from_alt_ram(&pf->hw, &max_bw, &min_bw,
8083                                            &min_valid, &max_valid);
8084
8085         if (!status) {
8086                 if (min_valid)
8087                         pf->npar_min_bw = min_bw;
8088                 if (max_valid)
8089                         pf->npar_max_bw = max_bw;
8090         }
8091
8092         return status;
8093 }
8094
8095 /**
8096  * i40e_set_npar_bw_setting - Set BW settings for this PF partition
8097  * @pf: board private structure
8098  **/
8099 i40e_status i40e_set_npar_bw_setting(struct i40e_pf *pf)
8100 {
8101         struct i40e_aqc_configure_partition_bw_data bw_data;
8102         i40e_status status;
8103
8104         /* Set the valid bit for this PF */
8105         bw_data.pf_valid_bits = cpu_to_le16(BIT(pf->hw.pf_id));
8106         bw_data.max_bw[pf->hw.pf_id] = pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK;
8107         bw_data.min_bw[pf->hw.pf_id] = pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK;
8108
8109         /* Set the new bandwidths */
8110         status = i40e_aq_configure_partition_bw(&pf->hw, &bw_data, NULL);
8111
8112         return status;
8113 }
8114
8115 /**
8116  * i40e_commit_npar_bw_setting - Commit BW settings for this PF partition
8117  * @pf: board private structure
8118  **/
8119 i40e_status i40e_commit_npar_bw_setting(struct i40e_pf *pf)
8120 {
8121         /* Commit temporary BW setting to permanent NVM image */
8122         enum i40e_admin_queue_err last_aq_status;
8123         i40e_status ret;
8124         u16 nvm_word;
8125
8126         if (pf->hw.partition_id != 1) {
8127                 dev_info(&pf->pdev->dev,
8128                          "Commit BW only works on partition 1! This is partition %d",
8129                          pf->hw.partition_id);
8130                 ret = I40E_NOT_SUPPORTED;
8131                 goto bw_commit_out;
8132         }
8133
8134         /* Acquire NVM for read access */
8135         ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_READ);
8136         last_aq_status = pf->hw.aq.asq_last_status;
8137         if (ret) {
8138                 dev_info(&pf->pdev->dev,
8139                          "Cannot acquire NVM for read access, err %s aq_err %s\n",
8140                          i40e_stat_str(&pf->hw, ret),
8141                          i40e_aq_str(&pf->hw, last_aq_status));
8142                 goto bw_commit_out;
8143         }
8144
8145         /* Read word 0x10 of NVM - SW compatibility word 1 */
8146         ret = i40e_aq_read_nvm(&pf->hw,
8147                                I40E_SR_NVM_CONTROL_WORD,
8148                                0x10, sizeof(nvm_word), &nvm_word,
8149                                false, NULL);
8150         /* Save off last admin queue command status before releasing
8151          * the NVM
8152          */
8153         last_aq_status = pf->hw.aq.asq_last_status;
8154         i40e_release_nvm(&pf->hw);
8155         if (ret) {
8156                 dev_info(&pf->pdev->dev, "NVM read error, err %s aq_err %s\n",
8157                          i40e_stat_str(&pf->hw, ret),
8158                          i40e_aq_str(&pf->hw, last_aq_status));
8159                 goto bw_commit_out;
8160         }
8161
8162         /* Wait a bit for NVM release to complete */
8163         msleep(50);
8164
8165         /* Acquire NVM for write access */
8166         ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_WRITE);
8167         last_aq_status = pf->hw.aq.asq_last_status;
8168         if (ret) {
8169                 dev_info(&pf->pdev->dev,
8170                          "Cannot acquire NVM for write access, err %s aq_err %s\n",
8171                          i40e_stat_str(&pf->hw, ret),
8172                          i40e_aq_str(&pf->hw, last_aq_status));
8173                 goto bw_commit_out;
8174         }
8175         /* Write it back out unchanged to initiate update NVM,
8176          * which will force a write of the shadow (alt) RAM to
8177          * the NVM - thus storing the bandwidth values permanently.
8178          */
8179         ret = i40e_aq_update_nvm(&pf->hw,
8180                                  I40E_SR_NVM_CONTROL_WORD,
8181                                  0x10, sizeof(nvm_word),
8182                                  &nvm_word, true, NULL);
8183         /* Save off last admin queue command status before releasing
8184          * the NVM
8185          */
8186         last_aq_status = pf->hw.aq.asq_last_status;
8187         i40e_release_nvm(&pf->hw);
8188         if (ret)
8189                 dev_info(&pf->pdev->dev,
8190                          "BW settings NOT SAVED, err %s aq_err %s\n",
8191                          i40e_stat_str(&pf->hw, ret),
8192                          i40e_aq_str(&pf->hw, last_aq_status));
8193 bw_commit_out:
8194
8195         return ret;
8196 }
8197
8198 /**
8199  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
8200  * @pf: board private structure to initialize
8201  *
8202  * i40e_sw_init initializes the Adapter private data structure.
8203  * Fields are initialized based on PCI device information and
8204  * OS network device settings (MTU size).
8205  **/
8206 static int i40e_sw_init(struct i40e_pf *pf)
8207 {
8208         int err = 0;
8209         int size;
8210
8211         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
8212                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
8213         pf->hw.debug_mask = pf->msg_enable | I40E_DEBUG_DIAG;
8214         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
8215                 if (I40E_DEBUG_USER & debug)
8216                         pf->hw.debug_mask = debug;
8217                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
8218                                                 I40E_DEFAULT_MSG_ENABLE);
8219         }
8220
8221         /* Set default capability flags */
8222         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
8223                     I40E_FLAG_MSI_ENABLED     |
8224                     I40E_FLAG_LINK_POLLING_ENABLED |
8225                     I40E_FLAG_MSIX_ENABLED;
8226
8227         if (iommu_present(&pci_bus_type))
8228                 pf->flags |= I40E_FLAG_RX_PS_ENABLED;
8229         else
8230                 pf->flags |= I40E_FLAG_RX_1BUF_ENABLED;
8231
8232         /* Set default ITR */
8233         pf->rx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF;
8234         pf->tx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF;
8235
8236         /* Depending on PF configurations, it is possible that the RSS
8237          * maximum might end up larger than the available queues
8238          */
8239         pf->rss_size_max = BIT(pf->hw.func_caps.rss_table_entry_width);
8240         pf->rss_size = 1;
8241         pf->rss_table_size = pf->hw.func_caps.rss_table_size;
8242         pf->rss_size_max = min_t(int, pf->rss_size_max,
8243                                  pf->hw.func_caps.num_tx_qp);
8244         if (pf->hw.func_caps.rss) {
8245                 pf->flags |= I40E_FLAG_RSS_ENABLED;
8246                 pf->rss_size = min_t(int, pf->rss_size_max, num_online_cpus());
8247         }
8248
8249         /* MFP mode enabled */
8250         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.flex10_enable) {
8251                 pf->flags |= I40E_FLAG_MFP_ENABLED;
8252                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
8253                 if (i40e_get_npar_bw_setting(pf))
8254                         dev_warn(&pf->pdev->dev,
8255                                  "Could not get NPAR bw settings\n");
8256                 else
8257                         dev_info(&pf->pdev->dev,
8258                                  "Min BW = %8.8x, Max BW = %8.8x\n",
8259                                  pf->npar_min_bw, pf->npar_max_bw);
8260         }
8261
8262         /* FW/NVM is not yet fixed in this regard */
8263         if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
8264             (pf->hw.func_caps.fd_filters_best_effort > 0)) {
8265                 pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
8266                 pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
8267                 if (pf->flags & I40E_FLAG_MFP_ENABLED &&
8268                     pf->hw.num_partitions > 1)
8269                         dev_info(&pf->pdev->dev,
8270                                  "Flow Director Sideband mode Disabled in MFP mode\n");
8271                 else
8272                         pf->flags |= I40E_FLAG_FD_SB_ENABLED;
8273                 pf->fdir_pf_filter_count =
8274                                  pf->hw.func_caps.fd_filters_guaranteed;
8275                 pf->hw.fdir_shared_filter_count =
8276                                  pf->hw.func_caps.fd_filters_best_effort;
8277         }
8278
8279         if (pf->hw.func_caps.vmdq) {
8280                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
8281                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
8282                 pf->num_vmdq_qps = i40e_default_queues_per_vmdq(pf);
8283         }
8284
8285 #ifdef I40E_FCOE
8286         i40e_init_pf_fcoe(pf);
8287
8288 #endif /* I40E_FCOE */
8289 #ifdef CONFIG_PCI_IOV
8290         if (pf->hw.func_caps.num_vfs && pf->hw.partition_id == 1) {
8291                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
8292                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
8293                 pf->num_req_vfs = min_t(int,
8294                                         pf->hw.func_caps.num_vfs,
8295                                         I40E_MAX_VF_COUNT);
8296         }
8297 #endif /* CONFIG_PCI_IOV */
8298         if (pf->hw.mac.type == I40E_MAC_X722) {
8299                 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE |
8300                              I40E_FLAG_128_QP_RSS_CAPABLE |
8301                              I40E_FLAG_HW_ATR_EVICT_CAPABLE |
8302                              I40E_FLAG_OUTER_UDP_CSUM_CAPABLE |
8303                              I40E_FLAG_WB_ON_ITR_CAPABLE |
8304                              I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE;
8305         }
8306         pf->eeprom_version = 0xDEAD;
8307         pf->lan_veb = I40E_NO_VEB;
8308         pf->lan_vsi = I40E_NO_VSI;
8309
8310         /* By default FW has this off for performance reasons */
8311         pf->flags &= ~I40E_FLAG_VEB_STATS_ENABLED;
8312
8313         /* set up queue assignment tracking */
8314         size = sizeof(struct i40e_lump_tracking)
8315                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
8316         pf->qp_pile = kzalloc(size, GFP_KERNEL);
8317         if (!pf->qp_pile) {
8318                 err = -ENOMEM;
8319                 goto sw_init_done;
8320         }
8321         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
8322         pf->qp_pile->search_hint = 0;
8323
8324         pf->tx_timeout_recovery_level = 1;
8325
8326         mutex_init(&pf->switch_mutex);
8327
8328         /* If NPAR is enabled nudge the Tx scheduler */
8329         if (pf->hw.func_caps.npar_enable && (!i40e_get_npar_bw_setting(pf)))
8330                 i40e_set_npar_bw_setting(pf);
8331
8332 sw_init_done:
8333         return err;
8334 }
8335
8336 /**
8337  * i40e_set_ntuple - set the ntuple feature flag and take action
8338  * @pf: board private structure to initialize
8339  * @features: the feature set that the stack is suggesting
8340  *
8341  * returns a bool to indicate if reset needs to happen
8342  **/
8343 bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
8344 {
8345         bool need_reset = false;
8346
8347         /* Check if Flow Director n-tuple support was enabled or disabled.  If
8348          * the state changed, we need to reset.
8349          */
8350         if (features & NETIF_F_NTUPLE) {
8351                 /* Enable filters and mark for reset */
8352                 if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
8353                         need_reset = true;
8354                 pf->flags |= I40E_FLAG_FD_SB_ENABLED;
8355         } else {
8356                 /* turn off filters, mark for reset and clear SW filter list */
8357                 if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
8358                         need_reset = true;
8359                         i40e_fdir_filter_exit(pf);
8360                 }
8361                 pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
8362                 pf->auto_disable_flags &= ~I40E_FLAG_FD_SB_ENABLED;
8363                 /* reset fd counters */
8364                 pf->fd_add_err = pf->fd_atr_cnt = pf->fd_tcp_rule = 0;
8365                 pf->fdir_pf_active_filters = 0;
8366                 pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
8367                 if (I40E_DEBUG_FD & pf->hw.debug_mask)
8368                         dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
8369                 /* if ATR was auto disabled it can be re-enabled. */
8370                 if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
8371                     (pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED))
8372                         pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
8373         }
8374         return need_reset;
8375 }
8376
8377 /**
8378  * i40e_set_features - set the netdev feature flags
8379  * @netdev: ptr to the netdev being adjusted
8380  * @features: the feature set that the stack is suggesting
8381  **/
8382 static int i40e_set_features(struct net_device *netdev,
8383                              netdev_features_t features)
8384 {
8385         struct i40e_netdev_priv *np = netdev_priv(netdev);
8386         struct i40e_vsi *vsi = np->vsi;
8387         struct i40e_pf *pf = vsi->back;
8388         bool need_reset;
8389
8390         if (features & NETIF_F_HW_VLAN_CTAG_RX)
8391                 i40e_vlan_stripping_enable(vsi);
8392         else
8393                 i40e_vlan_stripping_disable(vsi);
8394
8395         need_reset = i40e_set_ntuple(pf, features);
8396
8397         if (need_reset)
8398                 i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
8399
8400         return 0;
8401 }
8402
8403 #ifdef CONFIG_I40E_VXLAN
8404 /**
8405  * i40e_get_vxlan_port_idx - Lookup a possibly offloaded for Rx UDP port
8406  * @pf: board private structure
8407  * @port: The UDP port to look up
8408  *
8409  * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
8410  **/
8411 static u8 i40e_get_vxlan_port_idx(struct i40e_pf *pf, __be16 port)
8412 {
8413         u8 i;
8414
8415         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
8416                 if (pf->vxlan_ports[i] == port)
8417                         return i;
8418         }
8419
8420         return i;
8421 }
8422
8423 /**
8424  * i40e_add_vxlan_port - Get notifications about VXLAN ports that come up
8425  * @netdev: This physical port's netdev
8426  * @sa_family: Socket Family that VXLAN is notifying us about
8427  * @port: New UDP port number that VXLAN started listening to
8428  **/
8429 static void i40e_add_vxlan_port(struct net_device *netdev,
8430                                 sa_family_t sa_family, __be16 port)
8431 {
8432         struct i40e_netdev_priv *np = netdev_priv(netdev);
8433         struct i40e_vsi *vsi = np->vsi;
8434         struct i40e_pf *pf = vsi->back;
8435         u8 next_idx;
8436         u8 idx;
8437
8438         if (sa_family == AF_INET6)
8439                 return;
8440
8441         idx = i40e_get_vxlan_port_idx(pf, port);
8442
8443         /* Check if port already exists */
8444         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
8445                 netdev_info(netdev, "vxlan port %d already offloaded\n",
8446                             ntohs(port));
8447                 return;
8448         }
8449
8450         /* Now check if there is space to add the new port */
8451         next_idx = i40e_get_vxlan_port_idx(pf, 0);
8452
8453         if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
8454                 netdev_info(netdev, "maximum number of vxlan UDP ports reached, not adding port %d\n",
8455                             ntohs(port));
8456                 return;
8457         }
8458
8459         /* New port: add it and mark its index in the bitmap */
8460         pf->vxlan_ports[next_idx] = port;
8461         pf->pending_vxlan_bitmap |= BIT_ULL(next_idx);
8462         pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
8463 }
8464
8465 /**
8466  * i40e_del_vxlan_port - Get notifications about VXLAN ports that go away
8467  * @netdev: This physical port's netdev
8468  * @sa_family: Socket Family that VXLAN is notifying us about
8469  * @port: UDP port number that VXLAN stopped listening to
8470  **/
8471 static void i40e_del_vxlan_port(struct net_device *netdev,
8472                                 sa_family_t sa_family, __be16 port)
8473 {
8474         struct i40e_netdev_priv *np = netdev_priv(netdev);
8475         struct i40e_vsi *vsi = np->vsi;
8476         struct i40e_pf *pf = vsi->back;
8477         u8 idx;
8478
8479         if (sa_family == AF_INET6)
8480                 return;
8481
8482         idx = i40e_get_vxlan_port_idx(pf, port);
8483
8484         /* Check if port already exists */
8485         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
8486                 /* if port exists, set it to 0 (mark for deletion)
8487                  * and make it pending
8488                  */
8489                 pf->vxlan_ports[idx] = 0;
8490                 pf->pending_vxlan_bitmap |= BIT_ULL(idx);
8491                 pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
8492         } else {
8493                 netdev_warn(netdev, "vxlan port %d was not found, not deleting\n",
8494                             ntohs(port));
8495         }
8496 }
8497
8498 #endif
8499 static int i40e_get_phys_port_id(struct net_device *netdev,
8500                                  struct netdev_phys_item_id *ppid)
8501 {
8502         struct i40e_netdev_priv *np = netdev_priv(netdev);
8503         struct i40e_pf *pf = np->vsi->back;
8504         struct i40e_hw *hw = &pf->hw;
8505
8506         if (!(pf->flags & I40E_FLAG_PORT_ID_VALID))
8507                 return -EOPNOTSUPP;
8508
8509         ppid->id_len = min_t(int, sizeof(hw->mac.port_addr), sizeof(ppid->id));
8510         memcpy(ppid->id, hw->mac.port_addr, ppid->id_len);
8511
8512         return 0;
8513 }
8514
8515 /**
8516  * i40e_ndo_fdb_add - add an entry to the hardware database
8517  * @ndm: the input from the stack
8518  * @tb: pointer to array of nladdr (unused)
8519  * @dev: the net device pointer
8520  * @addr: the MAC address entry being added
8521  * @flags: instructions from stack about fdb operation
8522  */
8523 static int i40e_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
8524                             struct net_device *dev,
8525                             const unsigned char *addr, u16 vid,
8526                             u16 flags)
8527 {
8528         struct i40e_netdev_priv *np = netdev_priv(dev);
8529         struct i40e_pf *pf = np->vsi->back;
8530         int err = 0;
8531
8532         if (!(pf->flags & I40E_FLAG_SRIOV_ENABLED))
8533                 return -EOPNOTSUPP;
8534
8535         if (vid) {
8536                 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
8537                 return -EINVAL;
8538         }
8539
8540         /* Hardware does not support aging addresses so if a
8541          * ndm_state is given only allow permanent addresses
8542          */
8543         if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
8544                 netdev_info(dev, "FDB only supports static addresses\n");
8545                 return -EINVAL;
8546         }
8547
8548         if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
8549                 err = dev_uc_add_excl(dev, addr);
8550         else if (is_multicast_ether_addr(addr))
8551                 err = dev_mc_add_excl(dev, addr);
8552         else
8553                 err = -EINVAL;
8554
8555         /* Only return duplicate errors if NLM_F_EXCL is set */
8556         if (err == -EEXIST && !(flags & NLM_F_EXCL))
8557                 err = 0;
8558
8559         return err;
8560 }
8561
8562 /**
8563  * i40e_ndo_bridge_setlink - Set the hardware bridge mode
8564  * @dev: the netdev being configured
8565  * @nlh: RTNL message
8566  *
8567  * Inserts a new hardware bridge if not already created and
8568  * enables the bridging mode requested (VEB or VEPA). If the
8569  * hardware bridge has already been inserted and the request
8570  * is to change the mode then that requires a PF reset to
8571  * allow rebuild of the components with required hardware
8572  * bridge mode enabled.
8573  **/
8574 static int i40e_ndo_bridge_setlink(struct net_device *dev,
8575                                    struct nlmsghdr *nlh,
8576                                    u16 flags)
8577 {
8578         struct i40e_netdev_priv *np = netdev_priv(dev);
8579         struct i40e_vsi *vsi = np->vsi;
8580         struct i40e_pf *pf = vsi->back;
8581         struct i40e_veb *veb = NULL;
8582         struct nlattr *attr, *br_spec;
8583         int i, rem;
8584
8585         /* Only for PF VSI for now */
8586         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
8587                 return -EOPNOTSUPP;
8588
8589         /* Find the HW bridge for PF VSI */
8590         for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
8591                 if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
8592                         veb = pf->veb[i];
8593         }
8594
8595         br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
8596
8597         nla_for_each_nested(attr, br_spec, rem) {
8598                 __u16 mode;
8599
8600                 if (nla_type(attr) != IFLA_BRIDGE_MODE)
8601                         continue;
8602
8603                 mode = nla_get_u16(attr);
8604                 if ((mode != BRIDGE_MODE_VEPA) &&
8605                     (mode != BRIDGE_MODE_VEB))
8606                         return -EINVAL;
8607
8608                 /* Insert a new HW bridge */
8609                 if (!veb) {
8610                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
8611                                              vsi->tc_config.enabled_tc);
8612                         if (veb) {
8613                                 veb->bridge_mode = mode;
8614                                 i40e_config_bridge_mode(veb);
8615                         } else {
8616                                 /* No Bridge HW offload available */
8617                                 return -ENOENT;
8618                         }
8619                         break;
8620                 } else if (mode != veb->bridge_mode) {
8621                         /* Existing HW bridge but different mode needs reset */
8622                         veb->bridge_mode = mode;
8623                         /* TODO: If no VFs or VMDq VSIs, disallow VEB mode */
8624                         if (mode == BRIDGE_MODE_VEB)
8625                                 pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
8626                         else
8627                                 pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
8628                         i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
8629                         break;
8630                 }
8631         }
8632
8633         return 0;
8634 }
8635
8636 /**
8637  * i40e_ndo_bridge_getlink - Get the hardware bridge mode
8638  * @skb: skb buff
8639  * @pid: process id
8640  * @seq: RTNL message seq #
8641  * @dev: the netdev being configured
8642  * @filter_mask: unused
8643  * @nlflags: netlink flags passed in
8644  *
8645  * Return the mode in which the hardware bridge is operating in
8646  * i.e VEB or VEPA.
8647  **/
8648 static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
8649                                    struct net_device *dev,
8650                                    u32 __always_unused filter_mask,
8651                                    int nlflags)
8652 {
8653         struct i40e_netdev_priv *np = netdev_priv(dev);
8654         struct i40e_vsi *vsi = np->vsi;
8655         struct i40e_pf *pf = vsi->back;
8656         struct i40e_veb *veb = NULL;
8657         int i;
8658
8659         /* Only for PF VSI for now */
8660         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
8661                 return -EOPNOTSUPP;
8662
8663         /* Find the HW bridge for the PF VSI */
8664         for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
8665                 if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
8666                         veb = pf->veb[i];
8667         }
8668
8669         if (!veb)
8670                 return 0;
8671
8672         return ndo_dflt_bridge_getlink(skb, pid, seq, dev, veb->bridge_mode,
8673                                        nlflags, 0, 0, filter_mask, NULL);
8674 }
8675
8676 #define I40E_MAX_TUNNEL_HDR_LEN 80
8677 /**
8678  * i40e_features_check - Validate encapsulated packet conforms to limits
8679  * @skb: skb buff
8680  * @dev: This physical port's netdev
8681  * @features: Offload features that the stack believes apply
8682  **/
8683 static netdev_features_t i40e_features_check(struct sk_buff *skb,
8684                                              struct net_device *dev,
8685                                              netdev_features_t features)
8686 {
8687         if (skb->encapsulation &&
8688             (skb_inner_mac_header(skb) - skb_transport_header(skb) >
8689              I40E_MAX_TUNNEL_HDR_LEN))
8690                 return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
8691
8692         return features;
8693 }
8694
8695 static const struct net_device_ops i40e_netdev_ops = {
8696         .ndo_open               = i40e_open,
8697         .ndo_stop               = i40e_close,
8698         .ndo_start_xmit         = i40e_lan_xmit_frame,
8699         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
8700         .ndo_set_rx_mode        = i40e_set_rx_mode,
8701         .ndo_validate_addr      = eth_validate_addr,
8702         .ndo_set_mac_address    = i40e_set_mac,
8703         .ndo_change_mtu         = i40e_change_mtu,
8704         .ndo_do_ioctl           = i40e_ioctl,
8705         .ndo_tx_timeout         = i40e_tx_timeout,
8706         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
8707         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
8708 #ifdef CONFIG_NET_POLL_CONTROLLER
8709         .ndo_poll_controller    = i40e_netpoll,
8710 #endif
8711         .ndo_setup_tc           = i40e_setup_tc,
8712 #ifdef I40E_FCOE
8713         .ndo_fcoe_enable        = i40e_fcoe_enable,
8714         .ndo_fcoe_disable       = i40e_fcoe_disable,
8715 #endif
8716         .ndo_set_features       = i40e_set_features,
8717         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
8718         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
8719         .ndo_set_vf_rate        = i40e_ndo_set_vf_bw,
8720         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
8721         .ndo_set_vf_link_state  = i40e_ndo_set_vf_link_state,
8722         .ndo_set_vf_spoofchk    = i40e_ndo_set_vf_spoofchk,
8723 #ifdef CONFIG_I40E_VXLAN
8724         .ndo_add_vxlan_port     = i40e_add_vxlan_port,
8725         .ndo_del_vxlan_port     = i40e_del_vxlan_port,
8726 #endif
8727         .ndo_get_phys_port_id   = i40e_get_phys_port_id,
8728         .ndo_fdb_add            = i40e_ndo_fdb_add,
8729         .ndo_features_check     = i40e_features_check,
8730         .ndo_bridge_getlink     = i40e_ndo_bridge_getlink,
8731         .ndo_bridge_setlink     = i40e_ndo_bridge_setlink,
8732 };
8733
8734 /**
8735  * i40e_config_netdev - Setup the netdev flags
8736  * @vsi: the VSI being configured
8737  *
8738  * Returns 0 on success, negative value on failure
8739  **/
8740 static int i40e_config_netdev(struct i40e_vsi *vsi)
8741 {
8742         u8 brdcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
8743         struct i40e_pf *pf = vsi->back;
8744         struct i40e_hw *hw = &pf->hw;
8745         struct i40e_netdev_priv *np;
8746         struct net_device *netdev;
8747         u8 mac_addr[ETH_ALEN];
8748         int etherdev_size;
8749
8750         etherdev_size = sizeof(struct i40e_netdev_priv);
8751         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
8752         if (!netdev)
8753                 return -ENOMEM;
8754
8755         vsi->netdev = netdev;
8756         np = netdev_priv(netdev);
8757         np->vsi = vsi;
8758
8759         netdev->hw_enc_features |= NETIF_F_IP_CSUM       |
8760                                   NETIF_F_GSO_UDP_TUNNEL |
8761                                   NETIF_F_GSO_GRE        |
8762                                   NETIF_F_TSO;
8763
8764         netdev->features = NETIF_F_SG                  |
8765                            NETIF_F_IP_CSUM             |
8766                            NETIF_F_SCTP_CSUM           |
8767                            NETIF_F_HIGHDMA             |
8768                            NETIF_F_GSO_UDP_TUNNEL      |
8769                            NETIF_F_GSO_GRE             |
8770                            NETIF_F_HW_VLAN_CTAG_TX     |
8771                            NETIF_F_HW_VLAN_CTAG_RX     |
8772                            NETIF_F_HW_VLAN_CTAG_FILTER |
8773                            NETIF_F_IPV6_CSUM           |
8774                            NETIF_F_TSO                 |
8775                            NETIF_F_TSO_ECN             |
8776                            NETIF_F_TSO6                |
8777                            NETIF_F_RXCSUM              |
8778                            NETIF_F_RXHASH              |
8779                            0;
8780
8781         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
8782                 netdev->features |= NETIF_F_NTUPLE;
8783
8784         /* copy netdev features into list of user selectable features */
8785         netdev->hw_features |= netdev->features;
8786
8787         if (vsi->type == I40E_VSI_MAIN) {
8788                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
8789                 ether_addr_copy(mac_addr, hw->mac.perm_addr);
8790                 /* The following steps are necessary to prevent reception
8791                  * of tagged packets - some older NVM configurations load a
8792                  * default a MAC-VLAN filter that accepts any tagged packet
8793                  * which must be replaced by a normal filter.
8794                  */
8795                 if (!i40e_rm_default_mac_filter(vsi, mac_addr)) {
8796                         spin_lock_bh(&vsi->mac_filter_list_lock);
8797                         i40e_add_filter(vsi, mac_addr,
8798                                         I40E_VLAN_ANY, false, true);
8799                         spin_unlock_bh(&vsi->mac_filter_list_lock);
8800                 }
8801         } else {
8802                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
8803                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
8804                          pf->vsi[pf->lan_vsi]->netdev->name);
8805                 random_ether_addr(mac_addr);
8806
8807                 spin_lock_bh(&vsi->mac_filter_list_lock);
8808                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
8809                 spin_unlock_bh(&vsi->mac_filter_list_lock);
8810         }
8811
8812         spin_lock_bh(&vsi->mac_filter_list_lock);
8813         i40e_add_filter(vsi, brdcast, I40E_VLAN_ANY, false, false);
8814         spin_unlock_bh(&vsi->mac_filter_list_lock);
8815
8816         ether_addr_copy(netdev->dev_addr, mac_addr);
8817         ether_addr_copy(netdev->perm_addr, mac_addr);
8818         /* vlan gets same features (except vlan offload)
8819          * after any tweaks for specific VSI types
8820          */
8821         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
8822                                                      NETIF_F_HW_VLAN_CTAG_RX |
8823                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
8824         netdev->priv_flags |= IFF_UNICAST_FLT;
8825         netdev->priv_flags |= IFF_SUPP_NOFCS;
8826         /* Setup netdev TC information */
8827         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
8828
8829         netdev->netdev_ops = &i40e_netdev_ops;
8830         netdev->watchdog_timeo = 5 * HZ;
8831         i40e_set_ethtool_ops(netdev);
8832 #ifdef I40E_FCOE
8833         i40e_fcoe_config_netdev(netdev, vsi);
8834 #endif
8835
8836         return 0;
8837 }
8838
8839 /**
8840  * i40e_vsi_delete - Delete a VSI from the switch
8841  * @vsi: the VSI being removed
8842  *
8843  * Returns 0 on success, negative value on failure
8844  **/
8845 static void i40e_vsi_delete(struct i40e_vsi *vsi)
8846 {
8847         /* remove default VSI is not allowed */
8848         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
8849                 return;
8850
8851         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
8852 }
8853
8854 /**
8855  * i40e_is_vsi_uplink_mode_veb - Check if the VSI's uplink bridge mode is VEB
8856  * @vsi: the VSI being queried
8857  *
8858  * Returns 1 if HW bridge mode is VEB and return 0 in case of VEPA mode
8859  **/
8860 int i40e_is_vsi_uplink_mode_veb(struct i40e_vsi *vsi)
8861 {
8862         struct i40e_veb *veb;
8863         struct i40e_pf *pf = vsi->back;
8864
8865         /* Uplink is not a bridge so default to VEB */
8866         if (vsi->veb_idx == I40E_NO_VEB)
8867                 return 1;
8868
8869         veb = pf->veb[vsi->veb_idx];
8870         if (!veb) {
8871                 dev_info(&pf->pdev->dev,
8872                          "There is no veb associated with the bridge\n");
8873                 return -ENOENT;
8874         }
8875
8876         /* Uplink is a bridge in VEPA mode */
8877         if (veb->bridge_mode & BRIDGE_MODE_VEPA) {
8878                 return 0;
8879         } else {
8880                 /* Uplink is a bridge in VEB mode */
8881                 return 1;
8882         }
8883
8884         /* VEPA is now default bridge, so return 0 */
8885         return 0;
8886 }
8887
8888 /**
8889  * i40e_add_vsi - Add a VSI to the switch
8890  * @vsi: the VSI being configured
8891  *
8892  * This initializes a VSI context depending on the VSI type to be added and
8893  * passes it down to the add_vsi aq command.
8894  **/
8895 static int i40e_add_vsi(struct i40e_vsi *vsi)
8896 {
8897         int ret = -ENODEV;
8898         u8 laa_macaddr[ETH_ALEN];
8899         bool found_laa_mac_filter = false;
8900         struct i40e_pf *pf = vsi->back;
8901         struct i40e_hw *hw = &pf->hw;
8902         struct i40e_vsi_context ctxt;
8903         struct i40e_mac_filter *f, *ftmp;
8904
8905         u8 enabled_tc = 0x1; /* TC0 enabled */
8906         int f_count = 0;
8907
8908         memset(&ctxt, 0, sizeof(ctxt));
8909         switch (vsi->type) {
8910         case I40E_VSI_MAIN:
8911                 /* The PF's main VSI is already setup as part of the
8912                  * device initialization, so we'll not bother with
8913                  * the add_vsi call, but we will retrieve the current
8914                  * VSI context.
8915                  */
8916                 ctxt.seid = pf->main_vsi_seid;
8917                 ctxt.pf_num = pf->hw.pf_id;
8918                 ctxt.vf_num = 0;
8919                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
8920                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
8921                 if (ret) {
8922                         dev_info(&pf->pdev->dev,
8923                                  "couldn't get PF vsi config, err %s aq_err %s\n",
8924                                  i40e_stat_str(&pf->hw, ret),
8925                                  i40e_aq_str(&pf->hw,
8926                                              pf->hw.aq.asq_last_status));
8927                         return -ENOENT;
8928                 }
8929                 vsi->info = ctxt.info;
8930                 vsi->info.valid_sections = 0;
8931
8932                 vsi->seid = ctxt.seid;
8933                 vsi->id = ctxt.vsi_number;
8934
8935                 enabled_tc = i40e_pf_get_tc_map(pf);
8936
8937                 /* MFP mode setup queue map and update VSI */
8938                 if ((pf->flags & I40E_FLAG_MFP_ENABLED) &&
8939                     !(pf->hw.func_caps.iscsi)) { /* NIC type PF */
8940                         memset(&ctxt, 0, sizeof(ctxt));
8941                         ctxt.seid = pf->main_vsi_seid;
8942                         ctxt.pf_num = pf->hw.pf_id;
8943                         ctxt.vf_num = 0;
8944                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
8945                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
8946                         if (ret) {
8947                                 dev_info(&pf->pdev->dev,
8948                                          "update vsi failed, err %s aq_err %s\n",
8949                                          i40e_stat_str(&pf->hw, ret),
8950                                          i40e_aq_str(&pf->hw,
8951                                                     pf->hw.aq.asq_last_status));
8952                                 ret = -ENOENT;
8953                                 goto err;
8954                         }
8955                         /* update the local VSI info queue map */
8956                         i40e_vsi_update_queue_map(vsi, &ctxt);
8957                         vsi->info.valid_sections = 0;
8958                 } else {
8959                         /* Default/Main VSI is only enabled for TC0
8960                          * reconfigure it to enable all TCs that are
8961                          * available on the port in SFP mode.
8962                          * For MFP case the iSCSI PF would use this
8963                          * flow to enable LAN+iSCSI TC.
8964                          */
8965                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
8966                         if (ret) {
8967                                 dev_info(&pf->pdev->dev,
8968                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %s aq_err %s\n",
8969                                          enabled_tc,
8970                                          i40e_stat_str(&pf->hw, ret),
8971                                          i40e_aq_str(&pf->hw,
8972                                                     pf->hw.aq.asq_last_status));
8973                                 ret = -ENOENT;
8974                         }
8975                 }
8976                 break;
8977
8978         case I40E_VSI_FDIR:
8979                 ctxt.pf_num = hw->pf_id;
8980                 ctxt.vf_num = 0;
8981                 ctxt.uplink_seid = vsi->uplink_seid;
8982                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
8983                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
8984                 if ((pf->flags & I40E_FLAG_VEB_MODE_ENABLED) &&
8985                     (i40e_is_vsi_uplink_mode_veb(vsi))) {
8986                         ctxt.info.valid_sections |=
8987                              cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
8988                         ctxt.info.switch_id =
8989                            cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
8990                 }
8991                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
8992                 break;
8993
8994         case I40E_VSI_VMDQ2:
8995                 ctxt.pf_num = hw->pf_id;
8996                 ctxt.vf_num = 0;
8997                 ctxt.uplink_seid = vsi->uplink_seid;
8998                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
8999                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
9000
9001                 /* This VSI is connected to VEB so the switch_id
9002                  * should be set to zero by default.
9003                  */
9004                 if (i40e_is_vsi_uplink_mode_veb(vsi)) {
9005                         ctxt.info.valid_sections |=
9006                                 cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
9007                         ctxt.info.switch_id =
9008                                 cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
9009                 }
9010
9011                 /* Setup the VSI tx/rx queue map for TC0 only for now */
9012                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
9013                 break;
9014
9015         case I40E_VSI_SRIOV:
9016                 ctxt.pf_num = hw->pf_id;
9017                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
9018                 ctxt.uplink_seid = vsi->uplink_seid;
9019                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
9020                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
9021
9022                 /* This VSI is connected to VEB so the switch_id
9023                  * should be set to zero by default.
9024                  */
9025                 if (i40e_is_vsi_uplink_mode_veb(vsi)) {
9026                         ctxt.info.valid_sections |=
9027                                 cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
9028                         ctxt.info.switch_id =
9029                                 cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
9030                 }
9031
9032                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
9033                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
9034                 if (pf->vf[vsi->vf_id].spoofchk) {
9035                         ctxt.info.valid_sections |=
9036                                 cpu_to_le16(I40E_AQ_VSI_PROP_SECURITY_VALID);
9037                         ctxt.info.sec_flags |=
9038                                 (I40E_AQ_VSI_SEC_FLAG_ENABLE_VLAN_CHK |
9039                                  I40E_AQ_VSI_SEC_FLAG_ENABLE_MAC_CHK);
9040                 }
9041                 /* Setup the VSI tx/rx queue map for TC0 only for now */
9042                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
9043                 break;
9044
9045 #ifdef I40E_FCOE
9046         case I40E_VSI_FCOE:
9047                 ret = i40e_fcoe_vsi_init(vsi, &ctxt);
9048                 if (ret) {
9049                         dev_info(&pf->pdev->dev, "failed to initialize FCoE VSI\n");
9050                         return ret;
9051                 }
9052                 break;
9053
9054 #endif /* I40E_FCOE */
9055         default:
9056                 return -ENODEV;
9057         }
9058
9059         if (vsi->type != I40E_VSI_MAIN) {
9060                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
9061                 if (ret) {
9062                         dev_info(&vsi->back->pdev->dev,
9063                                  "add vsi failed, err %s aq_err %s\n",
9064                                  i40e_stat_str(&pf->hw, ret),
9065                                  i40e_aq_str(&pf->hw,
9066                                              pf->hw.aq.asq_last_status));
9067                         ret = -ENOENT;
9068                         goto err;
9069                 }
9070                 vsi->info = ctxt.info;
9071                 vsi->info.valid_sections = 0;
9072                 vsi->seid = ctxt.seid;
9073                 vsi->id = ctxt.vsi_number;
9074         }
9075
9076         spin_lock_bh(&vsi->mac_filter_list_lock);
9077         /* If macvlan filters already exist, force them to get loaded */
9078         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
9079                 f->changed = true;
9080                 f_count++;
9081
9082                 /* Expected to have only one MAC filter entry for LAA in list */
9083                 if (f->is_laa && vsi->type == I40E_VSI_MAIN) {
9084                         ether_addr_copy(laa_macaddr, f->macaddr);
9085                         found_laa_mac_filter = true;
9086                 }
9087         }
9088         spin_unlock_bh(&vsi->mac_filter_list_lock);
9089
9090         if (found_laa_mac_filter) {
9091                 struct i40e_aqc_remove_macvlan_element_data element;
9092
9093                 memset(&element, 0, sizeof(element));
9094                 ether_addr_copy(element.mac_addr, laa_macaddr);
9095                 element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
9096                 ret = i40e_aq_remove_macvlan(hw, vsi->seid,
9097                                              &element, 1, NULL);
9098                 if (ret) {
9099                         /* some older FW has a different default */
9100                         element.flags |=
9101                                        I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
9102                         i40e_aq_remove_macvlan(hw, vsi->seid,
9103                                                &element, 1, NULL);
9104                 }
9105
9106                 i40e_aq_mac_address_write(hw,
9107                                           I40E_AQC_WRITE_TYPE_LAA_WOL,
9108                                           laa_macaddr, NULL);
9109         }
9110
9111         if (f_count) {
9112                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
9113                 pf->flags |= I40E_FLAG_FILTER_SYNC;
9114         }
9115
9116         /* Update VSI BW information */
9117         ret = i40e_vsi_get_bw_info(vsi);
9118         if (ret) {
9119                 dev_info(&pf->pdev->dev,
9120                          "couldn't get vsi bw info, err %s aq_err %s\n",
9121                          i40e_stat_str(&pf->hw, ret),
9122                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
9123                 /* VSI is already added so not tearing that up */
9124                 ret = 0;
9125         }
9126
9127 err:
9128         return ret;
9129 }
9130
9131 /**
9132  * i40e_vsi_release - Delete a VSI and free its resources
9133  * @vsi: the VSI being removed
9134  *
9135  * Returns 0 on success or < 0 on error
9136  **/
9137 int i40e_vsi_release(struct i40e_vsi *vsi)
9138 {
9139         struct i40e_mac_filter *f, *ftmp;
9140         struct i40e_veb *veb = NULL;
9141         struct i40e_pf *pf;
9142         u16 uplink_seid;
9143         int i, n;
9144
9145         pf = vsi->back;
9146
9147         /* release of a VEB-owner or last VSI is not allowed */
9148         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
9149                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
9150                          vsi->seid, vsi->uplink_seid);
9151                 return -ENODEV;
9152         }
9153         if (vsi == pf->vsi[pf->lan_vsi] &&
9154             !test_bit(__I40E_DOWN, &pf->state)) {
9155                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
9156                 return -ENODEV;
9157         }
9158
9159         uplink_seid = vsi->uplink_seid;
9160         if (vsi->type != I40E_VSI_SRIOV) {
9161                 if (vsi->netdev_registered) {
9162                         vsi->netdev_registered = false;
9163                         if (vsi->netdev) {
9164                                 /* results in a call to i40e_close() */
9165                                 unregister_netdev(vsi->netdev);
9166                         }
9167                 } else {
9168                         i40e_vsi_close(vsi);
9169                 }
9170                 i40e_vsi_disable_irq(vsi);
9171         }
9172
9173         spin_lock_bh(&vsi->mac_filter_list_lock);
9174         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
9175                 i40e_del_filter(vsi, f->macaddr, f->vlan,
9176                                 f->is_vf, f->is_netdev);
9177         spin_unlock_bh(&vsi->mac_filter_list_lock);
9178
9179         i40e_sync_vsi_filters(vsi, false);
9180
9181         i40e_vsi_delete(vsi);
9182         i40e_vsi_free_q_vectors(vsi);
9183         if (vsi->netdev) {
9184                 free_netdev(vsi->netdev);
9185                 vsi->netdev = NULL;
9186         }
9187         i40e_vsi_clear_rings(vsi);
9188         i40e_vsi_clear(vsi);
9189
9190         /* If this was the last thing on the VEB, except for the
9191          * controlling VSI, remove the VEB, which puts the controlling
9192          * VSI onto the next level down in the switch.
9193          *
9194          * Well, okay, there's one more exception here: don't remove
9195          * the orphan VEBs yet.  We'll wait for an explicit remove request
9196          * from up the network stack.
9197          */
9198         for (n = 0, i = 0; i < pf->num_alloc_vsi; i++) {
9199                 if (pf->vsi[i] &&
9200                     pf->vsi[i]->uplink_seid == uplink_seid &&
9201                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
9202                         n++;      /* count the VSIs */
9203                 }
9204         }
9205         for (i = 0; i < I40E_MAX_VEB; i++) {
9206                 if (!pf->veb[i])
9207                         continue;
9208                 if (pf->veb[i]->uplink_seid == uplink_seid)
9209                         n++;     /* count the VEBs */
9210                 if (pf->veb[i]->seid == uplink_seid)
9211                         veb = pf->veb[i];
9212         }
9213         if (n == 0 && veb && veb->uplink_seid != 0)
9214                 i40e_veb_release(veb);
9215
9216         return 0;
9217 }
9218
9219 /**
9220  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
9221  * @vsi: ptr to the VSI
9222  *
9223  * This should only be called after i40e_vsi_mem_alloc() which allocates the
9224  * corresponding SW VSI structure and initializes num_queue_pairs for the
9225  * newly allocated VSI.
9226  *
9227  * Returns 0 on success or negative on failure
9228  **/
9229 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
9230 {
9231         int ret = -ENOENT;
9232         struct i40e_pf *pf = vsi->back;
9233
9234         if (vsi->q_vectors[0]) {
9235                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
9236                          vsi->seid);
9237                 return -EEXIST;
9238         }
9239
9240         if (vsi->base_vector) {
9241                 dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
9242                          vsi->seid, vsi->base_vector);
9243                 return -EEXIST;
9244         }
9245
9246         ret = i40e_vsi_alloc_q_vectors(vsi);
9247         if (ret) {
9248                 dev_info(&pf->pdev->dev,
9249                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
9250                          vsi->num_q_vectors, vsi->seid, ret);
9251                 vsi->num_q_vectors = 0;
9252                 goto vector_setup_out;
9253         }
9254
9255         /* In Legacy mode, we do not have to get any other vector since we
9256          * piggyback on the misc/ICR0 for queue interrupts.
9257         */
9258         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
9259                 return ret;
9260         if (vsi->num_q_vectors)
9261                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
9262                                                  vsi->num_q_vectors, vsi->idx);
9263         if (vsi->base_vector < 0) {
9264                 dev_info(&pf->pdev->dev,
9265                          "failed to get tracking for %d vectors for VSI %d, err=%d\n",
9266                          vsi->num_q_vectors, vsi->seid, vsi->base_vector);
9267                 i40e_vsi_free_q_vectors(vsi);
9268                 ret = -ENOENT;
9269                 goto vector_setup_out;
9270         }
9271
9272 vector_setup_out:
9273         return ret;
9274 }
9275
9276 /**
9277  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
9278  * @vsi: pointer to the vsi.
9279  *
9280  * This re-allocates a vsi's queue resources.
9281  *
9282  * Returns pointer to the successfully allocated and configured VSI sw struct
9283  * on success, otherwise returns NULL on failure.
9284  **/
9285 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
9286 {
9287         struct i40e_pf *pf = vsi->back;
9288         u8 enabled_tc;
9289         int ret;
9290
9291         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
9292         i40e_vsi_clear_rings(vsi);
9293
9294         i40e_vsi_free_arrays(vsi, false);
9295         i40e_set_num_rings_in_vsi(vsi);
9296         ret = i40e_vsi_alloc_arrays(vsi, false);
9297         if (ret)
9298                 goto err_vsi;
9299
9300         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
9301         if (ret < 0) {
9302                 dev_info(&pf->pdev->dev,
9303                          "failed to get tracking for %d queues for VSI %d err %d\n",
9304                          vsi->alloc_queue_pairs, vsi->seid, ret);
9305                 goto err_vsi;
9306         }
9307         vsi->base_queue = ret;
9308
9309         /* Update the FW view of the VSI. Force a reset of TC and queue
9310          * layout configurations.
9311          */
9312         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
9313         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
9314         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
9315         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
9316
9317         /* assign it some queues */
9318         ret = i40e_alloc_rings(vsi);
9319         if (ret)
9320                 goto err_rings;
9321
9322         /* map all of the rings to the q_vectors */
9323         i40e_vsi_map_rings_to_vectors(vsi);
9324         return vsi;
9325
9326 err_rings:
9327         i40e_vsi_free_q_vectors(vsi);
9328         if (vsi->netdev_registered) {
9329                 vsi->netdev_registered = false;
9330                 unregister_netdev(vsi->netdev);
9331                 free_netdev(vsi->netdev);
9332                 vsi->netdev = NULL;
9333         }
9334         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
9335 err_vsi:
9336         i40e_vsi_clear(vsi);
9337         return NULL;
9338 }
9339
9340 /**
9341  * i40e_vsi_setup - Set up a VSI by a given type
9342  * @pf: board private structure
9343  * @type: VSI type
9344  * @uplink_seid: the switch element to link to
9345  * @param1: usage depends upon VSI type. For VF types, indicates VF id
9346  *
9347  * This allocates the sw VSI structure and its queue resources, then add a VSI
9348  * to the identified VEB.
9349  *
9350  * Returns pointer to the successfully allocated and configure VSI sw struct on
9351  * success, otherwise returns NULL on failure.
9352  **/
9353 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
9354                                 u16 uplink_seid, u32 param1)
9355 {
9356         struct i40e_vsi *vsi = NULL;
9357         struct i40e_veb *veb = NULL;
9358         int ret, i;
9359         int v_idx;
9360
9361         /* The requested uplink_seid must be either
9362          *     - the PF's port seid
9363          *              no VEB is needed because this is the PF
9364          *              or this is a Flow Director special case VSI
9365          *     - seid of an existing VEB
9366          *     - seid of a VSI that owns an existing VEB
9367          *     - seid of a VSI that doesn't own a VEB
9368          *              a new VEB is created and the VSI becomes the owner
9369          *     - seid of the PF VSI, which is what creates the first VEB
9370          *              this is a special case of the previous
9371          *
9372          * Find which uplink_seid we were given and create a new VEB if needed
9373          */
9374         for (i = 0; i < I40E_MAX_VEB; i++) {
9375                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
9376                         veb = pf->veb[i];
9377                         break;
9378                 }
9379         }
9380
9381         if (!veb && uplink_seid != pf->mac_seid) {
9382
9383                 for (i = 0; i < pf->num_alloc_vsi; i++) {
9384                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
9385                                 vsi = pf->vsi[i];
9386                                 break;
9387                         }
9388                 }
9389                 if (!vsi) {
9390                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
9391                                  uplink_seid);
9392                         return NULL;
9393                 }
9394
9395                 if (vsi->uplink_seid == pf->mac_seid)
9396                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
9397                                              vsi->tc_config.enabled_tc);
9398                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
9399                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
9400                                              vsi->tc_config.enabled_tc);
9401                 if (veb) {
9402                         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid) {
9403                                 dev_info(&vsi->back->pdev->dev,
9404                                          "New VSI creation error, uplink seid of LAN VSI expected.\n");
9405                                 return NULL;
9406                         }
9407                         /* We come up by default in VEPA mode if SRIOV is not
9408                          * already enabled, in which case we can't force VEPA
9409                          * mode.
9410                          */
9411                         if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) {
9412                                 veb->bridge_mode = BRIDGE_MODE_VEPA;
9413                                 pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
9414                         }
9415                         i40e_config_bridge_mode(veb);
9416                 }
9417                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
9418                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
9419                                 veb = pf->veb[i];
9420                 }
9421                 if (!veb) {
9422                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
9423                         return NULL;
9424                 }
9425
9426                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
9427                 uplink_seid = veb->seid;
9428         }
9429
9430         /* get vsi sw struct */
9431         v_idx = i40e_vsi_mem_alloc(pf, type);
9432         if (v_idx < 0)
9433                 goto err_alloc;
9434         vsi = pf->vsi[v_idx];
9435         if (!vsi)
9436                 goto err_alloc;
9437         vsi->type = type;
9438         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
9439
9440         if (type == I40E_VSI_MAIN)
9441                 pf->lan_vsi = v_idx;
9442         else if (type == I40E_VSI_SRIOV)
9443                 vsi->vf_id = param1;
9444         /* assign it some queues */
9445         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs,
9446                                 vsi->idx);
9447         if (ret < 0) {
9448                 dev_info(&pf->pdev->dev,
9449                          "failed to get tracking for %d queues for VSI %d err=%d\n",
9450                          vsi->alloc_queue_pairs, vsi->seid, ret);
9451                 goto err_vsi;
9452         }
9453         vsi->base_queue = ret;
9454
9455         /* get a VSI from the hardware */
9456         vsi->uplink_seid = uplink_seid;
9457         ret = i40e_add_vsi(vsi);
9458         if (ret)
9459                 goto err_vsi;
9460
9461         switch (vsi->type) {
9462         /* setup the netdev if needed */
9463         case I40E_VSI_MAIN:
9464         case I40E_VSI_VMDQ2:
9465         case I40E_VSI_FCOE:
9466                 ret = i40e_config_netdev(vsi);
9467                 if (ret)
9468                         goto err_netdev;
9469                 ret = register_netdev(vsi->netdev);
9470                 if (ret)
9471                         goto err_netdev;
9472                 vsi->netdev_registered = true;
9473                 netif_carrier_off(vsi->netdev);
9474 #ifdef CONFIG_I40E_DCB
9475                 /* Setup DCB netlink interface */
9476                 i40e_dcbnl_setup(vsi);
9477 #endif /* CONFIG_I40E_DCB */
9478                 /* fall through */
9479
9480         case I40E_VSI_FDIR:
9481                 /* set up vectors and rings if needed */
9482                 ret = i40e_vsi_setup_vectors(vsi);
9483                 if (ret)
9484                         goto err_msix;
9485
9486                 ret = i40e_alloc_rings(vsi);
9487                 if (ret)
9488                         goto err_rings;
9489
9490                 /* map all of the rings to the q_vectors */
9491                 i40e_vsi_map_rings_to_vectors(vsi);
9492
9493                 i40e_vsi_reset_stats(vsi);
9494                 break;
9495
9496         default:
9497                 /* no netdev or rings for the other VSI types */
9498                 break;
9499         }
9500
9501         if ((pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) &&
9502             (vsi->type == I40E_VSI_VMDQ2)) {
9503                 ret = i40e_vsi_config_rss(vsi);
9504         }
9505         return vsi;
9506
9507 err_rings:
9508         i40e_vsi_free_q_vectors(vsi);
9509 err_msix:
9510         if (vsi->netdev_registered) {
9511                 vsi->netdev_registered = false;
9512                 unregister_netdev(vsi->netdev);
9513                 free_netdev(vsi->netdev);
9514                 vsi->netdev = NULL;
9515         }
9516 err_netdev:
9517         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
9518 err_vsi:
9519         i40e_vsi_clear(vsi);
9520 err_alloc:
9521         return NULL;
9522 }
9523
9524 /**
9525  * i40e_veb_get_bw_info - Query VEB BW information
9526  * @veb: the veb to query
9527  *
9528  * Query the Tx scheduler BW configuration data for given VEB
9529  **/
9530 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
9531 {
9532         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
9533         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
9534         struct i40e_pf *pf = veb->pf;
9535         struct i40e_hw *hw = &pf->hw;
9536         u32 tc_bw_max;
9537         int ret = 0;
9538         int i;
9539
9540         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
9541                                                   &bw_data, NULL);
9542         if (ret) {
9543                 dev_info(&pf->pdev->dev,
9544                          "query veb bw config failed, err %s aq_err %s\n",
9545                          i40e_stat_str(&pf->hw, ret),
9546                          i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
9547                 goto out;
9548         }
9549
9550         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
9551                                                    &ets_data, NULL);
9552         if (ret) {
9553                 dev_info(&pf->pdev->dev,
9554                          "query veb bw ets config failed, err %s aq_err %s\n",
9555                          i40e_stat_str(&pf->hw, ret),
9556                          i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
9557                 goto out;
9558         }
9559
9560         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
9561         veb->bw_max_quanta = ets_data.tc_bw_max;
9562         veb->is_abs_credits = bw_data.absolute_credits_enable;
9563         veb->enabled_tc = ets_data.tc_valid_bits;
9564         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
9565                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
9566         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
9567                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
9568                 veb->bw_tc_limit_credits[i] =
9569                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
9570                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
9571         }
9572
9573 out:
9574         return ret;
9575 }
9576
9577 /**
9578  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
9579  * @pf: board private structure
9580  *
9581  * On error: returns error code (negative)
9582  * On success: returns vsi index in PF (positive)
9583  **/
9584 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
9585 {
9586         int ret = -ENOENT;
9587         struct i40e_veb *veb;
9588         int i;
9589
9590         /* Need to protect the allocation of switch elements at the PF level */
9591         mutex_lock(&pf->switch_mutex);
9592
9593         /* VEB list may be fragmented if VEB creation/destruction has
9594          * been happening.  We can afford to do a quick scan to look
9595          * for any free slots in the list.
9596          *
9597          * find next empty veb slot, looping back around if necessary
9598          */
9599         i = 0;
9600         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
9601                 i++;
9602         if (i >= I40E_MAX_VEB) {
9603                 ret = -ENOMEM;
9604                 goto err_alloc_veb;  /* out of VEB slots! */
9605         }
9606
9607         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
9608         if (!veb) {
9609                 ret = -ENOMEM;
9610                 goto err_alloc_veb;
9611         }
9612         veb->pf = pf;
9613         veb->idx = i;
9614         veb->enabled_tc = 1;
9615
9616         pf->veb[i] = veb;
9617         ret = i;
9618 err_alloc_veb:
9619         mutex_unlock(&pf->switch_mutex);
9620         return ret;
9621 }
9622
9623 /**
9624  * i40e_switch_branch_release - Delete a branch of the switch tree
9625  * @branch: where to start deleting
9626  *
9627  * This uses recursion to find the tips of the branch to be
9628  * removed, deleting until we get back to and can delete this VEB.
9629  **/
9630 static void i40e_switch_branch_release(struct i40e_veb *branch)
9631 {
9632         struct i40e_pf *pf = branch->pf;
9633         u16 branch_seid = branch->seid;
9634         u16 veb_idx = branch->idx;
9635         int i;
9636
9637         /* release any VEBs on this VEB - RECURSION */
9638         for (i = 0; i < I40E_MAX_VEB; i++) {
9639                 if (!pf->veb[i])
9640                         continue;
9641                 if (pf->veb[i]->uplink_seid == branch->seid)
9642                         i40e_switch_branch_release(pf->veb[i]);
9643         }
9644
9645         /* Release the VSIs on this VEB, but not the owner VSI.
9646          *
9647          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
9648          *       the VEB itself, so don't use (*branch) after this loop.
9649          */
9650         for (i = 0; i < pf->num_alloc_vsi; i++) {
9651                 if (!pf->vsi[i])
9652                         continue;
9653                 if (pf->vsi[i]->uplink_seid == branch_seid &&
9654                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
9655                         i40e_vsi_release(pf->vsi[i]);
9656                 }
9657         }
9658
9659         /* There's one corner case where the VEB might not have been
9660          * removed, so double check it here and remove it if needed.
9661          * This case happens if the veb was created from the debugfs
9662          * commands and no VSIs were added to it.
9663          */
9664         if (pf->veb[veb_idx])
9665                 i40e_veb_release(pf->veb[veb_idx]);
9666 }
9667
9668 /**
9669  * i40e_veb_clear - remove veb struct
9670  * @veb: the veb to remove
9671  **/
9672 static void i40e_veb_clear(struct i40e_veb *veb)
9673 {
9674         if (!veb)
9675                 return;
9676
9677         if (veb->pf) {
9678                 struct i40e_pf *pf = veb->pf;
9679
9680                 mutex_lock(&pf->switch_mutex);
9681                 if (pf->veb[veb->idx] == veb)
9682                         pf->veb[veb->idx] = NULL;
9683                 mutex_unlock(&pf->switch_mutex);
9684         }
9685
9686         kfree(veb);
9687 }
9688
9689 /**
9690  * i40e_veb_release - Delete a VEB and free its resources
9691  * @veb: the VEB being removed
9692  **/
9693 void i40e_veb_release(struct i40e_veb *veb)
9694 {
9695         struct i40e_vsi *vsi = NULL;
9696         struct i40e_pf *pf;
9697         int i, n = 0;
9698
9699         pf = veb->pf;
9700
9701         /* find the remaining VSI and check for extras */
9702         for (i = 0; i < pf->num_alloc_vsi; i++) {
9703                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
9704                         n++;
9705                         vsi = pf->vsi[i];
9706                 }
9707         }
9708         if (n != 1) {
9709                 dev_info(&pf->pdev->dev,
9710                          "can't remove VEB %d with %d VSIs left\n",
9711                          veb->seid, n);
9712                 return;
9713         }
9714
9715         /* move the remaining VSI to uplink veb */
9716         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
9717         if (veb->uplink_seid) {
9718                 vsi->uplink_seid = veb->uplink_seid;
9719                 if (veb->uplink_seid == pf->mac_seid)
9720                         vsi->veb_idx = I40E_NO_VEB;
9721                 else
9722                         vsi->veb_idx = veb->veb_idx;
9723         } else {
9724                 /* floating VEB */
9725                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
9726                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
9727         }
9728
9729         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
9730         i40e_veb_clear(veb);
9731 }
9732
9733 /**
9734  * i40e_add_veb - create the VEB in the switch
9735  * @veb: the VEB to be instantiated
9736  * @vsi: the controlling VSI
9737  **/
9738 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
9739 {
9740         struct i40e_pf *pf = veb->pf;
9741         bool is_default = veb->pf->cur_promisc;
9742         bool is_cloud = false;
9743         int ret;
9744
9745         /* get a VEB from the hardware */
9746         ret = i40e_aq_add_veb(&pf->hw, veb->uplink_seid, vsi->seid,
9747                               veb->enabled_tc, is_default,
9748                               is_cloud, &veb->seid, NULL);
9749         if (ret) {
9750                 dev_info(&pf->pdev->dev,
9751                          "couldn't add VEB, err %s aq_err %s\n",
9752                          i40e_stat_str(&pf->hw, ret),
9753                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
9754                 return -EPERM;
9755         }
9756
9757         /* get statistics counter */
9758         ret = i40e_aq_get_veb_parameters(&pf->hw, veb->seid, NULL, NULL,
9759                                          &veb->stats_idx, NULL, NULL, NULL);
9760         if (ret) {
9761                 dev_info(&pf->pdev->dev,
9762                          "couldn't get VEB statistics idx, err %s aq_err %s\n",
9763                          i40e_stat_str(&pf->hw, ret),
9764                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
9765                 return -EPERM;
9766         }
9767         ret = i40e_veb_get_bw_info(veb);
9768         if (ret) {
9769                 dev_info(&pf->pdev->dev,
9770                          "couldn't get VEB bw info, err %s aq_err %s\n",
9771                          i40e_stat_str(&pf->hw, ret),
9772                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
9773                 i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
9774                 return -ENOENT;
9775         }
9776
9777         vsi->uplink_seid = veb->seid;
9778         vsi->veb_idx = veb->idx;
9779         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
9780
9781         return 0;
9782 }
9783
9784 /**
9785  * i40e_veb_setup - Set up a VEB
9786  * @pf: board private structure
9787  * @flags: VEB setup flags
9788  * @uplink_seid: the switch element to link to
9789  * @vsi_seid: the initial VSI seid
9790  * @enabled_tc: Enabled TC bit-map
9791  *
9792  * This allocates the sw VEB structure and links it into the switch
9793  * It is possible and legal for this to be a duplicate of an already
9794  * existing VEB.  It is also possible for both uplink and vsi seids
9795  * to be zero, in order to create a floating VEB.
9796  *
9797  * Returns pointer to the successfully allocated VEB sw struct on
9798  * success, otherwise returns NULL on failure.
9799  **/
9800 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
9801                                 u16 uplink_seid, u16 vsi_seid,
9802                                 u8 enabled_tc)
9803 {
9804         struct i40e_veb *veb, *uplink_veb = NULL;
9805         int vsi_idx, veb_idx;
9806         int ret;
9807
9808         /* if one seid is 0, the other must be 0 to create a floating relay */
9809         if ((uplink_seid == 0 || vsi_seid == 0) &&
9810             (uplink_seid + vsi_seid != 0)) {
9811                 dev_info(&pf->pdev->dev,
9812                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
9813                          uplink_seid, vsi_seid);
9814                 return NULL;
9815         }
9816
9817         /* make sure there is such a vsi and uplink */
9818         for (vsi_idx = 0; vsi_idx < pf->num_alloc_vsi; vsi_idx++)
9819                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
9820                         break;
9821         if (vsi_idx >= pf->num_alloc_vsi && vsi_seid != 0) {
9822                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
9823                          vsi_seid);
9824                 return NULL;
9825         }
9826
9827         if (uplink_seid && uplink_seid != pf->mac_seid) {
9828                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
9829                         if (pf->veb[veb_idx] &&
9830                             pf->veb[veb_idx]->seid == uplink_seid) {
9831                                 uplink_veb = pf->veb[veb_idx];
9832                                 break;
9833                         }
9834                 }
9835                 if (!uplink_veb) {
9836                         dev_info(&pf->pdev->dev,
9837                                  "uplink seid %d not found\n", uplink_seid);
9838                         return NULL;
9839                 }
9840         }
9841
9842         /* get veb sw struct */
9843         veb_idx = i40e_veb_mem_alloc(pf);
9844         if (veb_idx < 0)
9845                 goto err_alloc;
9846         veb = pf->veb[veb_idx];
9847         veb->flags = flags;
9848         veb->uplink_seid = uplink_seid;
9849         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
9850         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
9851
9852         /* create the VEB in the switch */
9853         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
9854         if (ret)
9855                 goto err_veb;
9856         if (vsi_idx == pf->lan_vsi)
9857                 pf->lan_veb = veb->idx;
9858
9859         return veb;
9860
9861 err_veb:
9862         i40e_veb_clear(veb);
9863 err_alloc:
9864         return NULL;
9865 }
9866
9867 /**
9868  * i40e_setup_pf_switch_element - set PF vars based on switch type
9869  * @pf: board private structure
9870  * @ele: element we are building info from
9871  * @num_reported: total number of elements
9872  * @printconfig: should we print the contents
9873  *
9874  * helper function to assist in extracting a few useful SEID values.
9875  **/
9876 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
9877                                 struct i40e_aqc_switch_config_element_resp *ele,
9878                                 u16 num_reported, bool printconfig)
9879 {
9880         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
9881         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
9882         u8 element_type = ele->element_type;
9883         u16 seid = le16_to_cpu(ele->seid);
9884
9885         if (printconfig)
9886                 dev_info(&pf->pdev->dev,
9887                          "type=%d seid=%d uplink=%d downlink=%d\n",
9888                          element_type, seid, uplink_seid, downlink_seid);
9889
9890         switch (element_type) {
9891         case I40E_SWITCH_ELEMENT_TYPE_MAC:
9892                 pf->mac_seid = seid;
9893                 break;
9894         case I40E_SWITCH_ELEMENT_TYPE_VEB:
9895                 /* Main VEB? */
9896                 if (uplink_seid != pf->mac_seid)
9897                         break;
9898                 if (pf->lan_veb == I40E_NO_VEB) {
9899                         int v;
9900
9901                         /* find existing or else empty VEB */
9902                         for (v = 0; v < I40E_MAX_VEB; v++) {
9903                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
9904                                         pf->lan_veb = v;
9905                                         break;
9906                                 }
9907                         }
9908                         if (pf->lan_veb == I40E_NO_VEB) {
9909                                 v = i40e_veb_mem_alloc(pf);
9910                                 if (v < 0)
9911                                         break;
9912                                 pf->lan_veb = v;
9913                         }
9914                 }
9915
9916                 pf->veb[pf->lan_veb]->seid = seid;
9917                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
9918                 pf->veb[pf->lan_veb]->pf = pf;
9919                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
9920                 break;
9921         case I40E_SWITCH_ELEMENT_TYPE_VSI:
9922                 if (num_reported != 1)
9923                         break;
9924                 /* This is immediately after a reset so we can assume this is
9925                  * the PF's VSI
9926                  */
9927                 pf->mac_seid = uplink_seid;
9928                 pf->pf_seid = downlink_seid;
9929                 pf->main_vsi_seid = seid;
9930                 if (printconfig)
9931                         dev_info(&pf->pdev->dev,
9932                                  "pf_seid=%d main_vsi_seid=%d\n",
9933                                  pf->pf_seid, pf->main_vsi_seid);
9934                 break;
9935         case I40E_SWITCH_ELEMENT_TYPE_PF:
9936         case I40E_SWITCH_ELEMENT_TYPE_VF:
9937         case I40E_SWITCH_ELEMENT_TYPE_EMP:
9938         case I40E_SWITCH_ELEMENT_TYPE_BMC:
9939         case I40E_SWITCH_ELEMENT_TYPE_PE:
9940         case I40E_SWITCH_ELEMENT_TYPE_PA:
9941                 /* ignore these for now */
9942                 break;
9943         default:
9944                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
9945                          element_type, seid);
9946                 break;
9947         }
9948 }
9949
9950 /**
9951  * i40e_fetch_switch_configuration - Get switch config from firmware
9952  * @pf: board private structure
9953  * @printconfig: should we print the contents
9954  *
9955  * Get the current switch configuration from the device and
9956  * extract a few useful SEID values.
9957  **/
9958 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
9959 {
9960         struct i40e_aqc_get_switch_config_resp *sw_config;
9961         u16 next_seid = 0;
9962         int ret = 0;
9963         u8 *aq_buf;
9964         int i;
9965
9966         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
9967         if (!aq_buf)
9968                 return -ENOMEM;
9969
9970         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
9971         do {
9972                 u16 num_reported, num_total;
9973
9974                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
9975                                                 I40E_AQ_LARGE_BUF,
9976                                                 &next_seid, NULL);
9977                 if (ret) {
9978                         dev_info(&pf->pdev->dev,
9979                                  "get switch config failed err %s aq_err %s\n",
9980                                  i40e_stat_str(&pf->hw, ret),
9981                                  i40e_aq_str(&pf->hw,
9982                                              pf->hw.aq.asq_last_status));
9983                         kfree(aq_buf);
9984                         return -ENOENT;
9985                 }
9986
9987                 num_reported = le16_to_cpu(sw_config->header.num_reported);
9988                 num_total = le16_to_cpu(sw_config->header.num_total);
9989
9990                 if (printconfig)
9991                         dev_info(&pf->pdev->dev,
9992                                  "header: %d reported %d total\n",
9993                                  num_reported, num_total);
9994
9995                 for (i = 0; i < num_reported; i++) {
9996                         struct i40e_aqc_switch_config_element_resp *ele =
9997                                 &sw_config->element[i];
9998
9999                         i40e_setup_pf_switch_element(pf, ele, num_reported,
10000                                                      printconfig);
10001                 }
10002         } while (next_seid != 0);
10003
10004         kfree(aq_buf);
10005         return ret;
10006 }
10007
10008 /**
10009  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
10010  * @pf: board private structure
10011  * @reinit: if the Main VSI needs to re-initialized.
10012  *
10013  * Returns 0 on success, negative value on failure
10014  **/
10015 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
10016 {
10017         int ret;
10018
10019         /* find out what's out there already */
10020         ret = i40e_fetch_switch_configuration(pf, false);
10021         if (ret) {
10022                 dev_info(&pf->pdev->dev,
10023                          "couldn't fetch switch config, err %s aq_err %s\n",
10024                          i40e_stat_str(&pf->hw, ret),
10025                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10026                 return ret;
10027         }
10028         i40e_pf_reset_stats(pf);
10029
10030         /* first time setup */
10031         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
10032                 struct i40e_vsi *vsi = NULL;
10033                 u16 uplink_seid;
10034
10035                 /* Set up the PF VSI associated with the PF's main VSI
10036                  * that is already in the HW switch
10037                  */
10038                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
10039                         uplink_seid = pf->veb[pf->lan_veb]->seid;
10040                 else
10041                         uplink_seid = pf->mac_seid;
10042                 if (pf->lan_vsi == I40E_NO_VSI)
10043                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
10044                 else if (reinit)
10045                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
10046                 if (!vsi) {
10047                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
10048                         i40e_fdir_teardown(pf);
10049                         return -EAGAIN;
10050                 }
10051         } else {
10052                 /* force a reset of TC and queue layout configurations */
10053                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
10054
10055                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
10056                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
10057                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
10058         }
10059         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
10060
10061         i40e_fdir_sb_setup(pf);
10062
10063         /* Setup static PF queue filter control settings */
10064         ret = i40e_setup_pf_filter_control(pf);
10065         if (ret) {
10066                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
10067                          ret);
10068                 /* Failure here should not stop continuing other steps */
10069         }
10070
10071         /* enable RSS in the HW, even for only one queue, as the stack can use
10072          * the hash
10073          */
10074         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
10075                 i40e_pf_config_rss(pf);
10076
10077         /* fill in link information and enable LSE reporting */
10078         i40e_update_link_info(&pf->hw);
10079         i40e_link_event(pf);
10080
10081         /* Initialize user-specific link properties */
10082         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
10083                                   I40E_AQ_AN_COMPLETED) ? true : false);
10084
10085         i40e_ptp_init(pf);
10086
10087         return ret;
10088 }
10089
10090 /**
10091  * i40e_determine_queue_usage - Work out queue distribution
10092  * @pf: board private structure
10093  **/
10094 static void i40e_determine_queue_usage(struct i40e_pf *pf)
10095 {
10096         int queues_left;
10097
10098         pf->num_lan_qps = 0;
10099 #ifdef I40E_FCOE
10100         pf->num_fcoe_qps = 0;
10101 #endif
10102
10103         /* Find the max queues to be put into basic use.  We'll always be
10104          * using TC0, whether or not DCB is running, and TC0 will get the
10105          * big RSS set.
10106          */
10107         queues_left = pf->hw.func_caps.num_tx_qp;
10108
10109         if ((queues_left == 1) ||
10110             !(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
10111                 /* one qp for PF, no queues for anything else */
10112                 queues_left = 0;
10113                 pf->rss_size = pf->num_lan_qps = 1;
10114
10115                 /* make sure all the fancies are disabled */
10116                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
10117 #ifdef I40E_FCOE
10118                                I40E_FLAG_FCOE_ENABLED   |
10119 #endif
10120                                I40E_FLAG_FD_SB_ENABLED  |
10121                                I40E_FLAG_FD_ATR_ENABLED |
10122                                I40E_FLAG_DCB_CAPABLE    |
10123                                I40E_FLAG_SRIOV_ENABLED  |
10124                                I40E_FLAG_VMDQ_ENABLED);
10125         } else if (!(pf->flags & (I40E_FLAG_RSS_ENABLED |
10126                                   I40E_FLAG_FD_SB_ENABLED |
10127                                   I40E_FLAG_FD_ATR_ENABLED |
10128                                   I40E_FLAG_DCB_CAPABLE))) {
10129                 /* one qp for PF */
10130                 pf->rss_size = pf->num_lan_qps = 1;
10131                 queues_left -= pf->num_lan_qps;
10132
10133                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
10134 #ifdef I40E_FCOE
10135                                I40E_FLAG_FCOE_ENABLED   |
10136 #endif
10137                                I40E_FLAG_FD_SB_ENABLED  |
10138                                I40E_FLAG_FD_ATR_ENABLED |
10139                                I40E_FLAG_DCB_ENABLED    |
10140                                I40E_FLAG_VMDQ_ENABLED);
10141         } else {
10142                 /* Not enough queues for all TCs */
10143                 if ((pf->flags & I40E_FLAG_DCB_CAPABLE) &&
10144                     (queues_left < I40E_MAX_TRAFFIC_CLASS)) {
10145                         pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
10146                         dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
10147                 }
10148                 pf->num_lan_qps = max_t(int, pf->rss_size_max,
10149                                         num_online_cpus());
10150                 pf->num_lan_qps = min_t(int, pf->num_lan_qps,
10151                                         pf->hw.func_caps.num_tx_qp);
10152
10153                 queues_left -= pf->num_lan_qps;
10154         }
10155
10156 #ifdef I40E_FCOE
10157         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
10158                 if (I40E_DEFAULT_FCOE <= queues_left) {
10159                         pf->num_fcoe_qps = I40E_DEFAULT_FCOE;
10160                 } else if (I40E_MINIMUM_FCOE <= queues_left) {
10161                         pf->num_fcoe_qps = I40E_MINIMUM_FCOE;
10162                 } else {
10163                         pf->num_fcoe_qps = 0;
10164                         pf->flags &= ~I40E_FLAG_FCOE_ENABLED;
10165                         dev_info(&pf->pdev->dev, "not enough queues for FCoE. FCoE feature will be disabled\n");
10166                 }
10167
10168                 queues_left -= pf->num_fcoe_qps;
10169         }
10170
10171 #endif
10172         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
10173                 if (queues_left > 1) {
10174                         queues_left -= 1; /* save 1 queue for FD */
10175                 } else {
10176                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
10177                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
10178                 }
10179         }
10180
10181         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
10182             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
10183                 pf->num_req_vfs = min_t(int, pf->num_req_vfs,
10184                                         (queues_left / pf->num_vf_qps));
10185                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
10186         }
10187
10188         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
10189             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
10190                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
10191                                           (queues_left / pf->num_vmdq_qps));
10192                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
10193         }
10194
10195         pf->queues_left = queues_left;
10196         dev_dbg(&pf->pdev->dev,
10197                 "qs_avail=%d FD SB=%d lan_qs=%d lan_tc0=%d vf=%d*%d vmdq=%d*%d, remaining=%d\n",
10198                 pf->hw.func_caps.num_tx_qp,
10199                 !!(pf->flags & I40E_FLAG_FD_SB_ENABLED),
10200                 pf->num_lan_qps, pf->rss_size, pf->num_req_vfs, pf->num_vf_qps,
10201                 pf->num_vmdq_vsis, pf->num_vmdq_qps, queues_left);
10202 #ifdef I40E_FCOE
10203         dev_dbg(&pf->pdev->dev, "fcoe queues = %d\n", pf->num_fcoe_qps);
10204 #endif
10205 }
10206
10207 /**
10208  * i40e_setup_pf_filter_control - Setup PF static filter control
10209  * @pf: PF to be setup
10210  *
10211  * i40e_setup_pf_filter_control sets up a PF's initial filter control
10212  * settings. If PE/FCoE are enabled then it will also set the per PF
10213  * based filter sizes required for them. It also enables Flow director,
10214  * ethertype and macvlan type filter settings for the pf.
10215  *
10216  * Returns 0 on success, negative on failure
10217  **/
10218 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
10219 {
10220         struct i40e_filter_control_settings *settings = &pf->filter_settings;
10221
10222         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
10223
10224         /* Flow Director is enabled */
10225         if (pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED))
10226                 settings->enable_fdir = true;
10227
10228         /* Ethtype and MACVLAN filters enabled for PF */
10229         settings->enable_ethtype = true;
10230         settings->enable_macvlan = true;
10231
10232         if (i40e_set_filter_control(&pf->hw, settings))
10233                 return -ENOENT;
10234
10235         return 0;
10236 }
10237
10238 #define INFO_STRING_LEN 255
10239 #define REMAIN(__x) (INFO_STRING_LEN - (__x))
10240 static void i40e_print_features(struct i40e_pf *pf)
10241 {
10242         struct i40e_hw *hw = &pf->hw;
10243         char *buf, *string;
10244         int i = 0;
10245
10246         string = kzalloc(INFO_STRING_LEN, GFP_KERNEL);
10247         if (!string) {
10248                 dev_err(&pf->pdev->dev, "Features string allocation failed\n");
10249                 return;
10250         }
10251
10252         buf = string;
10253
10254         i += snprintf(&buf[i], REMAIN(i), "Features: PF-id[%d] ", hw->pf_id);
10255 #ifdef CONFIG_PCI_IOV
10256         i += snprintf(&buf[i], REMAIN(i), "VFs: %d ", pf->num_req_vfs);
10257 #endif
10258         i += snprintf(&buf[i], REMAIN(i), "VSIs: %d QP: %d RX: %s ",
10259                       pf->hw.func_caps.num_vsis,
10260                       pf->vsi[pf->lan_vsi]->num_queue_pairs,
10261                       pf->flags & I40E_FLAG_RX_PS_ENABLED ? "PS" : "1BUF");
10262
10263         if (pf->flags & I40E_FLAG_RSS_ENABLED)
10264                 i += snprintf(&buf[i], REMAIN(i), "RSS ");
10265         if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
10266                 i += snprintf(&buf[i], REMAIN(i), "FD_ATR ");
10267         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
10268                 i += snprintf(&buf[i], REMAIN(i), "FD_SB ");
10269                 i += snprintf(&buf[i], REMAIN(i), "NTUPLE ");
10270         }
10271         if (pf->flags & I40E_FLAG_DCB_CAPABLE)
10272                 i += snprintf(&buf[i], REMAIN(i), "DCB ");
10273 #if IS_ENABLED(CONFIG_VXLAN)
10274         i += snprintf(&buf[i], REMAIN(i), "VxLAN ");
10275 #endif
10276         if (pf->flags & I40E_FLAG_PTP)
10277                 i += snprintf(&buf[i], REMAIN(i), "PTP ");
10278 #ifdef I40E_FCOE
10279         if (pf->flags & I40E_FLAG_FCOE_ENABLED)
10280                 i += snprintf(&buf[i], REMAIN(i), "FCOE ");
10281 #endif
10282         if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
10283                 i += snprintf(&buf[i], REMAIN(i), "VEPA ");
10284         else
10285                 buf += sprintf(buf, "VEPA ");
10286
10287         dev_info(&pf->pdev->dev, "%s\n", string);
10288         kfree(string);
10289         WARN_ON(i > INFO_STRING_LEN);
10290 }
10291
10292 /**
10293  * i40e_probe - Device initialization routine
10294  * @pdev: PCI device information struct
10295  * @ent: entry in i40e_pci_tbl
10296  *
10297  * i40e_probe initializes a PF identified by a pci_dev structure.
10298  * The OS initialization, configuring of the PF private structure,
10299  * and a hardware reset occur.
10300  *
10301  * Returns 0 on success, negative on failure
10302  **/
10303 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
10304 {
10305         struct i40e_aq_get_phy_abilities_resp abilities;
10306         struct i40e_pf *pf;
10307         struct i40e_hw *hw;
10308         static u16 pfs_found;
10309         u16 wol_nvm_bits;
10310         u16 link_status;
10311         int err;
10312         u32 len;
10313         u32 val;
10314         u32 i;
10315         u8 set_fc_aq_fail;
10316
10317         err = pci_enable_device_mem(pdev);
10318         if (err)
10319                 return err;
10320
10321         /* set up for high or low dma */
10322         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
10323         if (err) {
10324                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
10325                 if (err) {
10326                         dev_err(&pdev->dev,
10327                                 "DMA configuration failed: 0x%x\n", err);
10328                         goto err_dma;
10329                 }
10330         }
10331
10332         /* set up pci connections */
10333         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
10334                                            IORESOURCE_MEM), i40e_driver_name);
10335         if (err) {
10336                 dev_info(&pdev->dev,
10337                          "pci_request_selected_regions failed %d\n", err);
10338                 goto err_pci_reg;
10339         }
10340
10341         pci_enable_pcie_error_reporting(pdev);
10342         pci_set_master(pdev);
10343
10344         /* Now that we have a PCI connection, we need to do the
10345          * low level device setup.  This is primarily setting up
10346          * the Admin Queue structures and then querying for the
10347          * device's current profile information.
10348          */
10349         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
10350         if (!pf) {
10351                 err = -ENOMEM;
10352                 goto err_pf_alloc;
10353         }
10354         pf->next_vsi = 0;
10355         pf->pdev = pdev;
10356         set_bit(__I40E_DOWN, &pf->state);
10357
10358         hw = &pf->hw;
10359         hw->back = pf;
10360
10361         pf->ioremap_len = min_t(int, pci_resource_len(pdev, 0),
10362                                 I40E_MAX_CSR_SPACE);
10363
10364         hw->hw_addr = ioremap(pci_resource_start(pdev, 0), pf->ioremap_len);
10365         if (!hw->hw_addr) {
10366                 err = -EIO;
10367                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
10368                          (unsigned int)pci_resource_start(pdev, 0),
10369                          pf->ioremap_len, err);
10370                 goto err_ioremap;
10371         }
10372         hw->vendor_id = pdev->vendor;
10373         hw->device_id = pdev->device;
10374         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
10375         hw->subsystem_vendor_id = pdev->subsystem_vendor;
10376         hw->subsystem_device_id = pdev->subsystem_device;
10377         hw->bus.device = PCI_SLOT(pdev->devfn);
10378         hw->bus.func = PCI_FUNC(pdev->devfn);
10379         pf->instance = pfs_found;
10380
10381         if (debug != -1) {
10382                 pf->msg_enable = pf->hw.debug_mask;
10383                 pf->msg_enable = debug;
10384         }
10385
10386         /* do a special CORER for clearing PXE mode once at init */
10387         if (hw->revision_id == 0 &&
10388             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
10389                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
10390                 i40e_flush(hw);
10391                 msleep(200);
10392                 pf->corer_count++;
10393
10394                 i40e_clear_pxe_mode(hw);
10395         }
10396
10397         /* Reset here to make sure all is clean and to define PF 'n' */
10398         i40e_clear_hw(hw);
10399         err = i40e_pf_reset(hw);
10400         if (err) {
10401                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
10402                 goto err_pf_reset;
10403         }
10404         pf->pfr_count++;
10405
10406         hw->aq.num_arq_entries = I40E_AQ_LEN;
10407         hw->aq.num_asq_entries = I40E_AQ_LEN;
10408         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
10409         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
10410         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
10411
10412         snprintf(pf->int_name, sizeof(pf->int_name) - 1,
10413                  "%s-%s:misc",
10414                  dev_driver_string(&pf->pdev->dev), dev_name(&pdev->dev));
10415
10416         err = i40e_init_shared_code(hw);
10417         if (err) {
10418                 dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
10419                          err);
10420                 goto err_pf_reset;
10421         }
10422
10423         /* set up a default setting for link flow control */
10424         pf->hw.fc.requested_mode = I40E_FC_NONE;
10425
10426         err = i40e_init_adminq(hw);
10427
10428         /* provide nvm, fw, api versions */
10429         dev_info(&pdev->dev, "fw %d.%d.%05d api %d.%d nvm %s\n",
10430                  hw->aq.fw_maj_ver, hw->aq.fw_min_ver, hw->aq.fw_build,
10431                  hw->aq.api_maj_ver, hw->aq.api_min_ver,
10432                  i40e_nvm_version_str(hw));
10433
10434         if (err) {
10435                 dev_info(&pdev->dev,
10436                          "The driver for the device stopped because the NVM image is newer than expected. You must install the most recent version of the network driver.\n");
10437                 goto err_pf_reset;
10438         }
10439
10440         if (hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
10441             hw->aq.api_min_ver > I40E_FW_API_VERSION_MINOR)
10442                 dev_info(&pdev->dev,
10443                          "The driver for the device detected a newer version of the NVM image than expected. Please install the most recent version of the network driver.\n");
10444         else if (hw->aq.api_maj_ver < I40E_FW_API_VERSION_MAJOR ||
10445                  hw->aq.api_min_ver < (I40E_FW_API_VERSION_MINOR - 1))
10446                 dev_info(&pdev->dev,
10447                          "The driver for the device detected an older version of the NVM image than expected. Please update the NVM image.\n");
10448
10449         i40e_verify_eeprom(pf);
10450
10451         /* Rev 0 hardware was never productized */
10452         if (hw->revision_id < 1)
10453                 dev_warn(&pdev->dev, "This device is a pre-production adapter/LOM. Please be aware there may be issues with your hardware. If you are experiencing problems please contact your Intel or hardware representative who provided you with this hardware.\n");
10454
10455         i40e_clear_pxe_mode(hw);
10456         err = i40e_get_capabilities(pf);
10457         if (err)
10458                 goto err_adminq_setup;
10459
10460         err = i40e_sw_init(pf);
10461         if (err) {
10462                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
10463                 goto err_sw_init;
10464         }
10465
10466         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
10467                                 hw->func_caps.num_rx_qp,
10468                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
10469         if (err) {
10470                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
10471                 goto err_init_lan_hmc;
10472         }
10473
10474         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
10475         if (err) {
10476                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
10477                 err = -ENOENT;
10478                 goto err_configure_lan_hmc;
10479         }
10480
10481         /* Disable LLDP for NICs that have firmware versions lower than v4.3.
10482          * Ignore error return codes because if it was already disabled via
10483          * hardware settings this will fail
10484          */
10485         if (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 3)) ||
10486             (pf->hw.aq.fw_maj_ver < 4)) {
10487                 dev_info(&pdev->dev, "Stopping firmware LLDP agent.\n");
10488                 i40e_aq_stop_lldp(hw, true, NULL);
10489         }
10490
10491         i40e_get_mac_addr(hw, hw->mac.addr);
10492         if (!is_valid_ether_addr(hw->mac.addr)) {
10493                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
10494                 err = -EIO;
10495                 goto err_mac_addr;
10496         }
10497         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
10498         ether_addr_copy(hw->mac.perm_addr, hw->mac.addr);
10499         i40e_get_port_mac_addr(hw, hw->mac.port_addr);
10500         if (is_valid_ether_addr(hw->mac.port_addr))
10501                 pf->flags |= I40E_FLAG_PORT_ID_VALID;
10502 #ifdef I40E_FCOE
10503         err = i40e_get_san_mac_addr(hw, hw->mac.san_addr);
10504         if (err)
10505                 dev_info(&pdev->dev,
10506                          "(non-fatal) SAN MAC retrieval failed: %d\n", err);
10507         if (!is_valid_ether_addr(hw->mac.san_addr)) {
10508                 dev_warn(&pdev->dev, "invalid SAN MAC address %pM, falling back to LAN MAC\n",
10509                          hw->mac.san_addr);
10510                 ether_addr_copy(hw->mac.san_addr, hw->mac.addr);
10511         }
10512         dev_info(&pf->pdev->dev, "SAN MAC: %pM\n", hw->mac.san_addr);
10513 #endif /* I40E_FCOE */
10514
10515         pci_set_drvdata(pdev, pf);
10516         pci_save_state(pdev);
10517 #ifdef CONFIG_I40E_DCB
10518         err = i40e_init_pf_dcb(pf);
10519         if (err) {
10520                 dev_info(&pdev->dev, "DCB init failed %d, disabled\n", err);
10521                 pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
10522                 /* Continue without DCB enabled */
10523         }
10524 #endif /* CONFIG_I40E_DCB */
10525
10526         /* set up periodic task facility */
10527         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
10528         pf->service_timer_period = HZ;
10529
10530         INIT_WORK(&pf->service_task, i40e_service_task);
10531         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
10532         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
10533
10534         /* NVM bit on means WoL disabled for the port */
10535         i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
10536         if ((1 << hw->port) & wol_nvm_bits || hw->partition_id != 1)
10537                 pf->wol_en = false;
10538         else
10539                 pf->wol_en = true;
10540         device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
10541
10542         /* set up the main switch operations */
10543         i40e_determine_queue_usage(pf);
10544         err = i40e_init_interrupt_scheme(pf);
10545         if (err)
10546                 goto err_switch_setup;
10547
10548         /* The number of VSIs reported by the FW is the minimum guaranteed
10549          * to us; HW supports far more and we share the remaining pool with
10550          * the other PFs. We allocate space for more than the guarantee with
10551          * the understanding that we might not get them all later.
10552          */
10553         if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
10554                 pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
10555         else
10556                 pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;
10557
10558         /* Set up the *vsi struct and our local tracking of the MAIN PF vsi. */
10559         len = sizeof(struct i40e_vsi *) * pf->num_alloc_vsi;
10560         pf->vsi = kzalloc(len, GFP_KERNEL);
10561         if (!pf->vsi) {
10562                 err = -ENOMEM;
10563                 goto err_switch_setup;
10564         }
10565
10566 #ifdef CONFIG_PCI_IOV
10567         /* prep for VF support */
10568         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
10569             (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
10570             !test_bit(__I40E_BAD_EEPROM, &pf->state)) {
10571                 if (pci_num_vf(pdev))
10572                         pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
10573         }
10574 #endif
10575         err = i40e_setup_pf_switch(pf, false);
10576         if (err) {
10577                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
10578                 goto err_vsis;
10579         }
10580
10581         /* Make sure flow control is set according to current settings */
10582         err = i40e_set_fc(hw, &set_fc_aq_fail, true);
10583         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_GET)
10584                 dev_dbg(&pf->pdev->dev,
10585                         "Set fc with err %s aq_err %s on get_phy_cap\n",
10586                         i40e_stat_str(hw, err),
10587                         i40e_aq_str(hw, hw->aq.asq_last_status));
10588         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_SET)
10589                 dev_dbg(&pf->pdev->dev,
10590                         "Set fc with err %s aq_err %s on set_phy_config\n",
10591                         i40e_stat_str(hw, err),
10592                         i40e_aq_str(hw, hw->aq.asq_last_status));
10593         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_UPDATE)
10594                 dev_dbg(&pf->pdev->dev,
10595                         "Set fc with err %s aq_err %s on get_link_info\n",
10596                         i40e_stat_str(hw, err),
10597                         i40e_aq_str(hw, hw->aq.asq_last_status));
10598
10599         /* if FDIR VSI was set up, start it now */
10600         for (i = 0; i < pf->num_alloc_vsi; i++) {
10601                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
10602                         i40e_vsi_open(pf->vsi[i]);
10603                         break;
10604                 }
10605         }
10606
10607         /* driver is only interested in link up/down and module qualification
10608          * reports from firmware
10609          */
10610         err = i40e_aq_set_phy_int_mask(&pf->hw,
10611                                        I40E_AQ_EVENT_LINK_UPDOWN |
10612                                        I40E_AQ_EVENT_MODULE_QUAL_FAIL, NULL);
10613         if (err)
10614                 dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
10615                          i40e_stat_str(&pf->hw, err),
10616                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10617
10618         /* Reconfigure hardware for allowing smaller MSS in the case
10619          * of TSO, so that we avoid the MDD being fired and causing
10620          * a reset in the case of small MSS+TSO.
10621          */
10622         val = rd32(hw, I40E_REG_MSS);
10623         if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
10624                 val &= ~I40E_REG_MSS_MIN_MASK;
10625                 val |= I40E_64BYTE_MSS;
10626                 wr32(hw, I40E_REG_MSS, val);
10627         }
10628
10629         if (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 33)) ||
10630             (pf->hw.aq.fw_maj_ver < 4)) {
10631                 msleep(75);
10632                 err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
10633                 if (err)
10634                         dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
10635                                  i40e_stat_str(&pf->hw, err),
10636                                  i40e_aq_str(&pf->hw,
10637                                              pf->hw.aq.asq_last_status));
10638         }
10639         /* The main driver is (mostly) up and happy. We need to set this state
10640          * before setting up the misc vector or we get a race and the vector
10641          * ends up disabled forever.
10642          */
10643         clear_bit(__I40E_DOWN, &pf->state);
10644
10645         /* In case of MSIX we are going to setup the misc vector right here
10646          * to handle admin queue events etc. In case of legacy and MSI
10647          * the misc functionality and queue processing is combined in
10648          * the same vector and that gets setup at open.
10649          */
10650         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
10651                 err = i40e_setup_misc_vector(pf);
10652                 if (err) {
10653                         dev_info(&pdev->dev,
10654                                  "setup of misc vector failed: %d\n", err);
10655                         goto err_vsis;
10656                 }
10657         }
10658
10659 #ifdef CONFIG_PCI_IOV
10660         /* prep for VF support */
10661         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
10662             (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
10663             !test_bit(__I40E_BAD_EEPROM, &pf->state)) {
10664                 u32 val;
10665
10666                 /* disable link interrupts for VFs */
10667                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
10668                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
10669                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
10670                 i40e_flush(hw);
10671
10672                 if (pci_num_vf(pdev)) {
10673                         dev_info(&pdev->dev,
10674                                  "Active VFs found, allocating resources.\n");
10675                         err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
10676                         if (err)
10677                                 dev_info(&pdev->dev,
10678                                          "Error %d allocating resources for existing VFs\n",
10679                                          err);
10680                 }
10681         }
10682 #endif /* CONFIG_PCI_IOV */
10683
10684         pfs_found++;
10685
10686         i40e_dbg_pf_init(pf);
10687
10688         /* tell the firmware that we're starting */
10689         i40e_send_version(pf);
10690
10691         /* since everything's happy, start the service_task timer */
10692         mod_timer(&pf->service_timer,
10693                   round_jiffies(jiffies + pf->service_timer_period));
10694
10695 #ifdef I40E_FCOE
10696         /* create FCoE interface */
10697         i40e_fcoe_vsi_setup(pf);
10698
10699 #endif
10700 #define PCI_SPEED_SIZE 8
10701 #define PCI_WIDTH_SIZE 8
10702         /* Devices on the IOSF bus do not have this information
10703          * and will report PCI Gen 1 x 1 by default so don't bother
10704          * checking them.
10705          */
10706         if (!(pf->flags & I40E_FLAG_NO_PCI_LINK_CHECK)) {
10707                 char speed[PCI_SPEED_SIZE] = "Unknown";
10708                 char width[PCI_WIDTH_SIZE] = "Unknown";
10709
10710                 /* Get the negotiated link width and speed from PCI config
10711                  * space
10712                  */
10713                 pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA,
10714                                           &link_status);
10715
10716                 i40e_set_pci_config_data(hw, link_status);
10717
10718                 switch (hw->bus.speed) {
10719                 case i40e_bus_speed_8000:
10720                         strncpy(speed, "8.0", PCI_SPEED_SIZE); break;
10721                 case i40e_bus_speed_5000:
10722                         strncpy(speed, "5.0", PCI_SPEED_SIZE); break;
10723                 case i40e_bus_speed_2500:
10724                         strncpy(speed, "2.5", PCI_SPEED_SIZE); break;
10725                 default:
10726                         break;
10727                 }
10728                 switch (hw->bus.width) {
10729                 case i40e_bus_width_pcie_x8:
10730                         strncpy(width, "8", PCI_WIDTH_SIZE); break;
10731                 case i40e_bus_width_pcie_x4:
10732                         strncpy(width, "4", PCI_WIDTH_SIZE); break;
10733                 case i40e_bus_width_pcie_x2:
10734                         strncpy(width, "2", PCI_WIDTH_SIZE); break;
10735                 case i40e_bus_width_pcie_x1:
10736                         strncpy(width, "1", PCI_WIDTH_SIZE); break;
10737                 default:
10738                         break;
10739                 }
10740
10741                 dev_info(&pdev->dev, "PCI-Express: Speed %sGT/s Width x%s\n",
10742                          speed, width);
10743
10744                 if (hw->bus.width < i40e_bus_width_pcie_x8 ||
10745                     hw->bus.speed < i40e_bus_speed_8000) {
10746                         dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
10747                         dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
10748                 }
10749         }
10750
10751         /* get the requested speeds from the fw */
10752         err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities, NULL);
10753         if (err)
10754                 dev_dbg(&pf->pdev->dev, "get requested speeds ret =  %s last_status =  %s\n",
10755                         i40e_stat_str(&pf->hw, err),
10756                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10757         pf->hw.phy.link_info.requested_speeds = abilities.link_speed;
10758
10759         /* get the supported phy types from the fw */
10760         err = i40e_aq_get_phy_capabilities(hw, false, true, &abilities, NULL);
10761         if (err)
10762                 dev_dbg(&pf->pdev->dev, "get supported phy types ret =  %s last_status =  %s\n",
10763                         i40e_stat_str(&pf->hw, err),
10764                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10765         pf->hw.phy.phy_types = le32_to_cpu(abilities.phy_type);
10766
10767         /* Add a filter to drop all Flow control frames from any VSI from being
10768          * transmitted. By doing so we stop a malicious VF from sending out
10769          * PAUSE or PFC frames and potentially controlling traffic for other
10770          * PF/VF VSIs.
10771          * The FW can still send Flow control frames if enabled.
10772          */
10773         i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
10774                                                        pf->main_vsi_seid);
10775
10776         /* print a string summarizing features */
10777         i40e_print_features(pf);
10778
10779         return 0;
10780
10781         /* Unwind what we've done if something failed in the setup */
10782 err_vsis:
10783         set_bit(__I40E_DOWN, &pf->state);
10784         i40e_clear_interrupt_scheme(pf);
10785         kfree(pf->vsi);
10786 err_switch_setup:
10787         i40e_reset_interrupt_capability(pf);
10788         del_timer_sync(&pf->service_timer);
10789 err_mac_addr:
10790 err_configure_lan_hmc:
10791         (void)i40e_shutdown_lan_hmc(hw);
10792 err_init_lan_hmc:
10793         kfree(pf->qp_pile);
10794 err_sw_init:
10795 err_adminq_setup:
10796         (void)i40e_shutdown_adminq(hw);
10797 err_pf_reset:
10798         iounmap(hw->hw_addr);
10799 err_ioremap:
10800         kfree(pf);
10801 err_pf_alloc:
10802         pci_disable_pcie_error_reporting(pdev);
10803         pci_release_selected_regions(pdev,
10804                                      pci_select_bars(pdev, IORESOURCE_MEM));
10805 err_pci_reg:
10806 err_dma:
10807         pci_disable_device(pdev);
10808         return err;
10809 }
10810
10811 /**
10812  * i40e_remove - Device removal routine
10813  * @pdev: PCI device information struct
10814  *
10815  * i40e_remove is called by the PCI subsystem to alert the driver
10816  * that is should release a PCI device.  This could be caused by a
10817  * Hot-Plug event, or because the driver is going to be removed from
10818  * memory.
10819  **/
10820 static void i40e_remove(struct pci_dev *pdev)
10821 {
10822         struct i40e_pf *pf = pci_get_drvdata(pdev);
10823         struct i40e_hw *hw = &pf->hw;
10824         i40e_status ret_code;
10825         int i;
10826
10827         i40e_dbg_pf_exit(pf);
10828
10829         i40e_ptp_stop(pf);
10830
10831         /* Disable RSS in hw */
10832         wr32(hw, I40E_PFQF_HENA(0), 0);
10833         wr32(hw, I40E_PFQF_HENA(1), 0);
10834
10835         /* no more scheduling of any task */
10836         set_bit(__I40E_DOWN, &pf->state);
10837         del_timer_sync(&pf->service_timer);
10838         cancel_work_sync(&pf->service_task);
10839         i40e_fdir_teardown(pf);
10840
10841         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
10842                 i40e_free_vfs(pf);
10843                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
10844         }
10845
10846         i40e_fdir_teardown(pf);
10847
10848         /* If there is a switch structure or any orphans, remove them.
10849          * This will leave only the PF's VSI remaining.
10850          */
10851         for (i = 0; i < I40E_MAX_VEB; i++) {
10852                 if (!pf->veb[i])
10853                         continue;
10854
10855                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
10856                     pf->veb[i]->uplink_seid == 0)
10857                         i40e_switch_branch_release(pf->veb[i]);
10858         }
10859
10860         /* Now we can shutdown the PF's VSI, just before we kill
10861          * adminq and hmc.
10862          */
10863         if (pf->vsi[pf->lan_vsi])
10864                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
10865
10866         /* shutdown and destroy the HMC */
10867         if (pf->hw.hmc.hmc_obj) {
10868                 ret_code = i40e_shutdown_lan_hmc(&pf->hw);
10869                 if (ret_code)
10870                         dev_warn(&pdev->dev,
10871                                  "Failed to destroy the HMC resources: %d\n",
10872                                  ret_code);
10873         }
10874
10875         /* shutdown the adminq */
10876         ret_code = i40e_shutdown_adminq(&pf->hw);
10877         if (ret_code)
10878                 dev_warn(&pdev->dev,
10879                          "Failed to destroy the Admin Queue resources: %d\n",
10880                          ret_code);
10881
10882         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
10883         i40e_clear_interrupt_scheme(pf);
10884         for (i = 0; i < pf->num_alloc_vsi; i++) {
10885                 if (pf->vsi[i]) {
10886                         i40e_vsi_clear_rings(pf->vsi[i]);
10887                         i40e_vsi_clear(pf->vsi[i]);
10888                         pf->vsi[i] = NULL;
10889                 }
10890         }
10891
10892         for (i = 0; i < I40E_MAX_VEB; i++) {
10893                 kfree(pf->veb[i]);
10894                 pf->veb[i] = NULL;
10895         }
10896
10897         kfree(pf->qp_pile);
10898         kfree(pf->vsi);
10899
10900         iounmap(pf->hw.hw_addr);
10901         kfree(pf);
10902         pci_release_selected_regions(pdev,
10903                                      pci_select_bars(pdev, IORESOURCE_MEM));
10904
10905         pci_disable_pcie_error_reporting(pdev);
10906         pci_disable_device(pdev);
10907 }
10908
10909 /**
10910  * i40e_pci_error_detected - warning that something funky happened in PCI land
10911  * @pdev: PCI device information struct
10912  *
10913  * Called to warn that something happened and the error handling steps
10914  * are in progress.  Allows the driver to quiesce things, be ready for
10915  * remediation.
10916  **/
10917 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
10918                                                 enum pci_channel_state error)
10919 {
10920         struct i40e_pf *pf = pci_get_drvdata(pdev);
10921
10922         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
10923
10924         /* shutdown all operations */
10925         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
10926                 rtnl_lock();
10927                 i40e_prep_for_reset(pf);
10928                 rtnl_unlock();
10929         }
10930
10931         /* Request a slot reset */
10932         return PCI_ERS_RESULT_NEED_RESET;
10933 }
10934
10935 /**
10936  * i40e_pci_error_slot_reset - a PCI slot reset just happened
10937  * @pdev: PCI device information struct
10938  *
10939  * Called to find if the driver can work with the device now that
10940  * the pci slot has been reset.  If a basic connection seems good
10941  * (registers are readable and have sane content) then return a
10942  * happy little PCI_ERS_RESULT_xxx.
10943  **/
10944 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
10945 {
10946         struct i40e_pf *pf = pci_get_drvdata(pdev);
10947         pci_ers_result_t result;
10948         int err;
10949         u32 reg;
10950
10951         dev_dbg(&pdev->dev, "%s\n", __func__);
10952         if (pci_enable_device_mem(pdev)) {
10953                 dev_info(&pdev->dev,
10954                          "Cannot re-enable PCI device after reset.\n");
10955                 result = PCI_ERS_RESULT_DISCONNECT;
10956         } else {
10957                 pci_set_master(pdev);
10958                 pci_restore_state(pdev);
10959                 pci_save_state(pdev);
10960                 pci_wake_from_d3(pdev, false);
10961
10962                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
10963                 if (reg == 0)
10964                         result = PCI_ERS_RESULT_RECOVERED;
10965                 else
10966                         result = PCI_ERS_RESULT_DISCONNECT;
10967         }
10968
10969         err = pci_cleanup_aer_uncorrect_error_status(pdev);
10970         if (err) {
10971                 dev_info(&pdev->dev,
10972                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
10973                          err);
10974                 /* non-fatal, continue */
10975         }
10976
10977         return result;
10978 }
10979
10980 /**
10981  * i40e_pci_error_resume - restart operations after PCI error recovery
10982  * @pdev: PCI device information struct
10983  *
10984  * Called to allow the driver to bring things back up after PCI error
10985  * and/or reset recovery has finished.
10986  **/
10987 static void i40e_pci_error_resume(struct pci_dev *pdev)
10988 {
10989         struct i40e_pf *pf = pci_get_drvdata(pdev);
10990
10991         dev_dbg(&pdev->dev, "%s\n", __func__);
10992         if (test_bit(__I40E_SUSPENDED, &pf->state))
10993                 return;
10994
10995         rtnl_lock();
10996         i40e_handle_reset_warning(pf);
10997         rtnl_unlock();
10998 }
10999
11000 /**
11001  * i40e_shutdown - PCI callback for shutting down
11002  * @pdev: PCI device information struct
11003  **/
11004 static void i40e_shutdown(struct pci_dev *pdev)
11005 {
11006         struct i40e_pf *pf = pci_get_drvdata(pdev);
11007         struct i40e_hw *hw = &pf->hw;
11008
11009         set_bit(__I40E_SUSPENDED, &pf->state);
11010         set_bit(__I40E_DOWN, &pf->state);
11011         rtnl_lock();
11012         i40e_prep_for_reset(pf);
11013         rtnl_unlock();
11014
11015         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11016         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11017
11018         del_timer_sync(&pf->service_timer);
11019         cancel_work_sync(&pf->service_task);
11020         i40e_fdir_teardown(pf);
11021
11022         rtnl_lock();
11023         i40e_prep_for_reset(pf);
11024         rtnl_unlock();
11025
11026         wr32(hw, I40E_PFPM_APM,
11027              (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11028         wr32(hw, I40E_PFPM_WUFC,
11029              (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11030
11031         i40e_clear_interrupt_scheme(pf);
11032
11033         if (system_state == SYSTEM_POWER_OFF) {
11034                 pci_wake_from_d3(pdev, pf->wol_en);
11035                 pci_set_power_state(pdev, PCI_D3hot);
11036         }
11037 }
11038
11039 #ifdef CONFIG_PM
11040 /**
11041  * i40e_suspend - PCI callback for moving to D3
11042  * @pdev: PCI device information struct
11043  **/
11044 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
11045 {
11046         struct i40e_pf *pf = pci_get_drvdata(pdev);
11047         struct i40e_hw *hw = &pf->hw;
11048
11049         set_bit(__I40E_SUSPENDED, &pf->state);
11050         set_bit(__I40E_DOWN, &pf->state);
11051
11052         rtnl_lock();
11053         i40e_prep_for_reset(pf);
11054         rtnl_unlock();
11055
11056         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11057         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11058
11059         pci_wake_from_d3(pdev, pf->wol_en);
11060         pci_set_power_state(pdev, PCI_D3hot);
11061
11062         return 0;
11063 }
11064
11065 /**
11066  * i40e_resume - PCI callback for waking up from D3
11067  * @pdev: PCI device information struct
11068  **/
11069 static int i40e_resume(struct pci_dev *pdev)
11070 {
11071         struct i40e_pf *pf = pci_get_drvdata(pdev);
11072         u32 err;
11073
11074         pci_set_power_state(pdev, PCI_D0);
11075         pci_restore_state(pdev);
11076         /* pci_restore_state() clears dev->state_saves, so
11077          * call pci_save_state() again to restore it.
11078          */
11079         pci_save_state(pdev);
11080
11081         err = pci_enable_device_mem(pdev);
11082         if (err) {
11083                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
11084                 return err;
11085         }
11086         pci_set_master(pdev);
11087
11088         /* no wakeup events while running */
11089         pci_wake_from_d3(pdev, false);
11090
11091         /* handling the reset will rebuild the device state */
11092         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
11093                 clear_bit(__I40E_DOWN, &pf->state);
11094                 rtnl_lock();
11095                 i40e_reset_and_rebuild(pf, false);
11096                 rtnl_unlock();
11097         }
11098
11099         return 0;
11100 }
11101
11102 #endif
11103 static const struct pci_error_handlers i40e_err_handler = {
11104         .error_detected = i40e_pci_error_detected,
11105         .slot_reset = i40e_pci_error_slot_reset,
11106         .resume = i40e_pci_error_resume,
11107 };
11108
11109 static struct pci_driver i40e_driver = {
11110         .name     = i40e_driver_name,
11111         .id_table = i40e_pci_tbl,
11112         .probe    = i40e_probe,
11113         .remove   = i40e_remove,
11114 #ifdef CONFIG_PM
11115         .suspend  = i40e_suspend,
11116         .resume   = i40e_resume,
11117 #endif
11118         .shutdown = i40e_shutdown,
11119         .err_handler = &i40e_err_handler,
11120         .sriov_configure = i40e_pci_sriov_configure,
11121 };
11122
11123 /**
11124  * i40e_init_module - Driver registration routine
11125  *
11126  * i40e_init_module is the first routine called when the driver is
11127  * loaded. All it does is register with the PCI subsystem.
11128  **/
11129 static int __init i40e_init_module(void)
11130 {
11131         pr_info("%s: %s - version %s\n", i40e_driver_name,
11132                 i40e_driver_string, i40e_driver_version_str);
11133         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
11134
11135         i40e_dbg_init();
11136         return pci_register_driver(&i40e_driver);
11137 }
11138 module_init(i40e_init_module);
11139
11140 /**
11141  * i40e_exit_module - Driver exit cleanup routine
11142  *
11143  * i40e_exit_module is called just before the driver is removed
11144  * from memory.
11145  **/
11146 static void __exit i40e_exit_module(void)
11147 {
11148         pci_unregister_driver(&i40e_driver);
11149         i40e_dbg_exit();
11150 }
11151 module_exit(i40e_exit_module);