drivers/net/ethernet/intel/i40evf/i40evf_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2016 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 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static int i40evf_close(struct net_device *netdev);
  32
  33 char i40evf_driver_name[] = "i40evf";
  34 static const char i40evf_driver_string[] =
  35         "Intel(R) 40-10 Gigabit Virtual Function Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 1
  40 #define DRV_VERSION_MINOR 4
  41 #define DRV_VERSION_BUILD 9
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD) \
  45              DRV_KERN
  46 const char i40evf_driver_version[] = DRV_VERSION;
  47 static const char i40evf_copyright[] =
  48         "Copyright (c) 2013 - 2015 Intel Corporation.";
  49
  50 /* i40evf_pci_tbl - PCI Device ID Table
  51  *
  52  * Wildcard entries (PCI_ANY_ID) should come last
  53  * Last entry must be all 0s
  54  *
  55  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  56  *   Class, Class Mask, private data (not used) }
  57  */
  58 static const struct pci_device_id i40evf_pci_tbl[] = {
  59         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  60         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  61         /* required last entry */
  62         {0, }
  63 };
  64
  65 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  66
  67 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  68 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  69 MODULE_LICENSE("GPL");
  70 MODULE_VERSION(DRV_VERSION);
  71
  72 static struct workqueue_struct *i40evf_wq;
  73
  74 /**
  75  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  76  * @hw:   pointer to the HW structure
  77  * @mem:  ptr to mem struct to fill out
  78  * @size: size of memory requested
  79  * @alignment: what to align the allocation to
  80  **/
  81 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  82                                       struct i40e_dma_mem *mem,
  83                                       u64 size, u32 alignment)
  84 {
  85         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  86
  87         if (!mem)
  88                 return I40E_ERR_PARAM;
  89
  90         mem->size = ALIGN(size, alignment);
  91         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  92                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  93         if (mem->va)
  94                 return 0;
  95         else
  96                 return I40E_ERR_NO_MEMORY;
  97 }
  98
  99 /**
 100  * i40evf_free_dma_mem_d - OS specific memory free for shared code
 101  * @hw:   pointer to the HW structure
 102  * @mem:  ptr to mem struct to free
 103  **/
 104 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 105 {
 106         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
 107
 108         if (!mem || !mem->va)
 109                 return I40E_ERR_PARAM;
 110         dma_free_coherent(&adapter->pdev->dev, mem->size,
 111                           mem->va, (dma_addr_t)mem->pa);
 112         return 0;
 113 }
 114
 115 /**
 116  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 117  * @hw:   pointer to the HW structure
 118  * @mem:  ptr to mem struct to fill out
 119  * @size: size of memory requested
 120  **/
 121 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 122                                        struct i40e_virt_mem *mem, u32 size)
 123 {
 124         if (!mem)
 125                 return I40E_ERR_PARAM;
 126
 127         mem->size = size;
 128         mem->va = kzalloc(size, GFP_KERNEL);
 129
 130         if (mem->va)
 131                 return 0;
 132         else
 133                 return I40E_ERR_NO_MEMORY;
 134 }
 135
 136 /**
 137  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 138  * @hw:   pointer to the HW structure
 139  * @mem:  ptr to mem struct to free
 140  **/
 141 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 142                                    struct i40e_virt_mem *mem)
 143 {
 144         if (!mem)
 145                 return I40E_ERR_PARAM;
 146
 147         /* it's ok to kfree a NULL pointer */
 148         kfree(mem->va);
 149
 150         return 0;
 151 }
 152
 153 /**
 154  * i40evf_debug_d - OS dependent version of debug printing
 155  * @hw:  pointer to the HW structure
 156  * @mask: debug level mask
 157  * @fmt_str: printf-type format description
 158  **/
 159 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 160 {
 161         char buf[512];
 162         va_list argptr;
 163
 164         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 165                 return;
 166
 167         va_start(argptr, fmt_str);
 168         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 169         va_end(argptr);
 170
 171         /* the debug string is already formatted with a newline */
 172         pr_info("%s", buf);
 173 }
 174
 175 /**
 176  * i40evf_schedule_reset - Set the flags and schedule a reset event
 177  * @adapter: board private structure
 178  **/
 179 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
 180 {
 181         if (!(adapter->flags &
 182               (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
 183                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 184                 schedule_work(&adapter->reset_task);
 185         }
 186 }
 187
 188 /**
 189  * i40evf_tx_timeout - Respond to a Tx Hang
 190  * @netdev: network interface device structure
 191  **/
 192 static void i40evf_tx_timeout(struct net_device *netdev)
 193 {
 194         struct i40evf_adapter *adapter = netdev_priv(netdev);
 195
 196         adapter->tx_timeout_count++;
 197         i40evf_schedule_reset(adapter);
 198 }
 199
 200 /**
 201  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 202  * @adapter: board private structure
 203  **/
 204 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 205 {
 206         struct i40e_hw *hw = &adapter->hw;
 207
 208         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 209
 210         /* read flush */
 211         rd32(hw, I40E_VFGEN_RSTAT);
 212
 213         synchronize_irq(adapter->msix_entries[0].vector);
 214 }
 215
 216 /**
 217  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 218  * @adapter: board private structure
 219  **/
 220 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 221 {
 222         struct i40e_hw *hw = &adapter->hw;
 223
 224         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 225                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 226         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 227
 228         /* read flush */
 229         rd32(hw, I40E_VFGEN_RSTAT);
 230 }
 231
 232 /**
 233  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 234  * @adapter: board private structure
 235  **/
 236 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 237 {
 238         int i;
 239         struct i40e_hw *hw = &adapter->hw;
 240
 241         if (!adapter->msix_entries)
 242                 return;
 243
 244         for (i = 1; i < adapter->num_msix_vectors; i++) {
 245                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 246                 synchronize_irq(adapter->msix_entries[i].vector);
 247         }
 248         /* read flush */
 249         rd32(hw, I40E_VFGEN_RSTAT);
 250 }
 251
 252 /**
 253  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 254  * @adapter: board private structure
 255  * @mask: bitmap of queues to enable
 256  **/
 257 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 258 {
 259         struct i40e_hw *hw = &adapter->hw;
 260         int i;
 261
 262         for (i = 1; i < adapter->num_msix_vectors; i++) {
 263                 if (mask & BIT(i - 1)) {
 264                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 265                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 266                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 267                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 268                 }
 269         }
 270 }
 271
 272 /**
 273  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 274  * @adapter: board private structure
 275  * @mask: bitmap of vectors to trigger
 276  **/
 277 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 278 {
 279         struct i40e_hw *hw = &adapter->hw;
 280         int i;
 281         u32 dyn_ctl;
 282
 283         if (mask & 1) {
 284                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 285                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 286                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 287                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 288                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 289         }
 290         for (i = 1; i < adapter->num_msix_vectors; i++) {
 291                 if (mask & BIT(i)) {
 292                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 293                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 294                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 295                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 296                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 297                 }
 298         }
 299 }
 300
 301 /**
 302  * i40evf_irq_enable - Enable default interrupt generation settings
 303  * @adapter: board private structure
 304  * @flush: boolean value whether to run rd32()
 305  **/
 306 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 307 {
 308         struct i40e_hw *hw = &adapter->hw;
 309
 310         i40evf_misc_irq_enable(adapter);
 311         i40evf_irq_enable_queues(adapter, ~0);
 312
 313         if (flush)
 314                 rd32(hw, I40E_VFGEN_RSTAT);
 315 }
 316
 317 /**
 318  * i40evf_msix_aq - Interrupt handler for vector 0
 319  * @irq: interrupt number
 320  * @data: pointer to netdev
 321  **/
 322 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 323 {
 324         struct net_device *netdev = data;
 325         struct i40evf_adapter *adapter = netdev_priv(netdev);
 326         struct i40e_hw *hw = &adapter->hw;
 327         u32 val;
 328
 329         /* handle non-queue interrupts, these reads clear the registers */
 330         val = rd32(hw, I40E_VFINT_ICR01);
 331         val = rd32(hw, I40E_VFINT_ICR0_ENA1);
 332
 333         val = rd32(hw, I40E_VFINT_DYN_CTL01) |
 334               I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 335         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 336
 337         /* schedule work on the private workqueue */
 338         schedule_work(&adapter->adminq_task);
 339
 340         return IRQ_HANDLED;
 341 }
 342
 343 /**
 344  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 345  * @irq: interrupt number
 346  * @data: pointer to a q_vector
 347  **/
 348 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 349 {
 350         struct i40e_q_vector *q_vector = data;
 351
 352         if (!q_vector->tx.ring && !q_vector->rx.ring)
 353                 return IRQ_HANDLED;
 354
 355         napi_schedule_irqoff(&q_vector->napi);
 356
 357         return IRQ_HANDLED;
 358 }
 359
 360 /**
 361  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 362  * @adapter: board private structure
 363  * @v_idx: interrupt number
 364  * @r_idx: queue number
 365  **/
 366 static void
 367 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 368 {
 369         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 370         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 371
 372         rx_ring->q_vector = q_vector;
 373         rx_ring->next = q_vector->rx.ring;
 374         rx_ring->vsi = &adapter->vsi;
 375         q_vector->rx.ring = rx_ring;
 376         q_vector->rx.count++;
 377         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 378         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 379 }
 380
 381 /**
 382  * i40evf_map_vector_to_txq - associate irqs with tx queues
 383  * @adapter: board private structure
 384  * @v_idx: interrupt number
 385  * @t_idx: queue number
 386  **/
 387 static void
 388 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 389 {
 390         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 391         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 392
 393         tx_ring->q_vector = q_vector;
 394         tx_ring->next = q_vector->tx.ring;
 395         tx_ring->vsi = &adapter->vsi;
 396         q_vector->tx.ring = tx_ring;
 397         q_vector->tx.count++;
 398         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 399         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 400         q_vector->num_ringpairs++;
 401         q_vector->ring_mask |= BIT(t_idx);
 402 }
 403
 404 /**
 405  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 406  * @adapter: board private structure to initialize
 407  *
 408  * This function maps descriptor rings to the queue-specific vectors
 409  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 410  * one vector per ring/queue, but on a constrained vector budget, we
 411  * group the rings as "efficiently" as possible.  You would add new
 412  * mapping configurations in here.
 413  **/
 414 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 415 {
 416         int q_vectors;
 417         int v_start = 0;
 418         int rxr_idx = 0, txr_idx = 0;
 419         int rxr_remaining = adapter->num_active_queues;
 420         int txr_remaining = adapter->num_active_queues;
 421         int i, j;
 422         int rqpv, tqpv;
 423         int err = 0;
 424
 425         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 426
 427         /* The ideal configuration...
 428          * We have enough vectors to map one per queue.
 429          */
 430         if (q_vectors >= (rxr_remaining * 2)) {
 431                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 432                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 433
 434                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 435                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 436                 goto out;
 437         }
 438
 439         /* If we don't have enough vectors for a 1-to-1
 440          * mapping, we'll have to group them so there are
 441          * multiple queues per vector.
 442          * Re-adjusting *qpv takes care of the remainder.
 443          */
 444         for (i = v_start; i < q_vectors; i++) {
 445                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 446                 for (j = 0; j < rqpv; j++) {
 447                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 448                         rxr_idx++;
 449                         rxr_remaining--;
 450                 }
 451         }
 452         for (i = v_start; i < q_vectors; i++) {
 453                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 454                 for (j = 0; j < tqpv; j++) {
 455                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 456                         txr_idx++;
 457                         txr_remaining--;
 458                 }
 459         }
 460
 461 out:
 462         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 463
 464         return err;
 465 }
 466
 467 #ifdef CONFIG_NET_POLL_CONTROLLER
 468 /**
 469  * i40evf_netpoll - A Polling 'interrupt' handler
 470  * @netdev: network interface device structure
 471  *
 472  * This is used by netconsole to send skbs without having to re-enable
 473  * interrupts.  It's not called while the normal interrupt routine is executing.
 474  **/
 475 static void i40evf_netpoll(struct net_device *netdev)
 476 {
 477         struct i40evf_adapter *adapter = netdev_priv(netdev);
 478         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 479         int i;
 480
 481         /* if interface is down do nothing */
 482         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 483                 return;
 484
 485         for (i = 0; i < q_vectors; i++)
 486                 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
 487 }
 488
 489 #endif
 490 /**
 491  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 492  * @adapter: board private structure
 493  *
 494  * Allocates MSI-X vectors for tx and rx handling, and requests
 495  * interrupts from the kernel.
 496  **/
 497 static int
 498 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 499 {
 500         int vector, err, q_vectors;
 501         int rx_int_idx = 0, tx_int_idx = 0;
 502
 503         i40evf_irq_disable(adapter);
 504         /* Decrement for Other and TCP Timer vectors */
 505         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 506
 507         for (vector = 0; vector < q_vectors; vector++) {
 508                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 509
 510                 if (q_vector->tx.ring && q_vector->rx.ring) {
 511                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 512                                  "i40evf-%s-%s-%d", basename,
 513                                  "TxRx", rx_int_idx++);
 514                         tx_int_idx++;
 515                 } else if (q_vector->rx.ring) {
 516                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 517                                  "i40evf-%s-%s-%d", basename,
 518                                  "rx", rx_int_idx++);
 519                 } else if (q_vector->tx.ring) {
 520                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 521                                  "i40evf-%s-%s-%d", basename,
 522                                  "tx", tx_int_idx++);
 523                 } else {
 524                         /* skip this unused q_vector */
 525                         continue;
 526                 }
 527                 err = request_irq(
 528                         adapter->msix_entries[vector + NONQ_VECS].vector,
 529                         i40evf_msix_clean_rings,
 530                         0,
 531                         q_vector->name,
 532                         q_vector);
 533                 if (err) {
 534                         dev_info(&adapter->pdev->dev,
 535                                  "Request_irq failed, error: %d\n", err);
 536                         goto free_queue_irqs;
 537                 }
 538                 /* assign the mask for this irq */
 539                 irq_set_affinity_hint(
 540                         adapter->msix_entries[vector + NONQ_VECS].vector,
 541                         q_vector->affinity_mask);
 542         }
 543
 544         return 0;
 545
 546 free_queue_irqs:
 547         while (vector) {
 548                 vector--;
 549                 irq_set_affinity_hint(
 550                         adapter->msix_entries[vector + NONQ_VECS].vector,
 551                         NULL);
 552                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 553                          &adapter->q_vectors[vector]);
 554         }
 555         return err;
 556 }
 557
 558 /**
 559  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 560  * @adapter: board private structure
 561  *
 562  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 563  * vector is only for the admin queue, and stays active even when the netdev
 564  * is closed.
 565  **/
 566 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 567 {
 568         struct net_device *netdev = adapter->netdev;
 569         int err;
 570
 571         snprintf(adapter->misc_vector_name,
 572                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 573                  dev_name(&adapter->pdev->dev));
 574         err = request_irq(adapter->msix_entries[0].vector,
 575                           &i40evf_msix_aq, 0,
 576                           adapter->misc_vector_name, netdev);
 577         if (err) {
 578                 dev_err(&adapter->pdev->dev,
 579                         "request_irq for %s failed: %d\n",
 580                         adapter->misc_vector_name, err);
 581                 free_irq(adapter->msix_entries[0].vector, netdev);
 582         }
 583         return err;
 584 }
 585
 586 /**
 587  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 588  * @adapter: board private structure
 589  *
 590  * Frees all MSI-X vectors other than 0.
 591  **/
 592 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 593 {
 594         int i;
 595         int q_vectors;
 596
 597         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 598
 599         for (i = 0; i < q_vectors; i++) {
 600                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 601                                       NULL);
 602                 free_irq(adapter->msix_entries[i+1].vector,
 603                          &adapter->q_vectors[i]);
 604         }
 605 }
 606
 607 /**
 608  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 609  * @adapter: board private structure
 610  *
 611  * Frees MSI-X vector 0.
 612  **/
 613 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 614 {
 615         struct net_device *netdev = adapter->netdev;
 616
 617         free_irq(adapter->msix_entries[0].vector, netdev);
 618 }
 619
 620 /**
 621  * i40evf_configure_tx - Configure Transmit Unit after Reset
 622  * @adapter: board private structure
 623  *
 624  * Configure the Tx unit of the MAC after a reset.
 625  **/
 626 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 627 {
 628         struct i40e_hw *hw = &adapter->hw;
 629         int i;
 630
 631         for (i = 0; i < adapter->num_active_queues; i++)
 632                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 633 }
 634
 635 /**
 636  * i40evf_configure_rx - Configure Receive Unit after Reset
 637  * @adapter: board private structure
 638  *
 639  * Configure the Rx unit of the MAC after a reset.
 640  **/
 641 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 642 {
 643         struct i40e_hw *hw = &adapter->hw;
 644         struct net_device *netdev = adapter->netdev;
 645         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 646         int i;
 647         int rx_buf_len;
 648
 649
 650         /* Set the RX buffer length according to the mode */
 651         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED ||
 652             netdev->mtu <= ETH_DATA_LEN)
 653                 rx_buf_len = I40EVF_RXBUFFER_2048;
 654         else
 655                 rx_buf_len = ALIGN(max_frame, 1024);
 656
 657         for (i = 0; i < adapter->num_active_queues; i++) {
 658                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 659                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 660                 if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 661                         set_ring_ps_enabled(&adapter->rx_rings[i]);
 662                         adapter->rx_rings[i].rx_hdr_len = I40E_RX_HDR_SIZE;
 663                 } else {
 664                         clear_ring_ps_enabled(&adapter->rx_rings[i]);
 665                 }
 666         }
 667 }
 668
 669 /**
 670  * i40evf_find_vlan - Search filter list for specific vlan filter
 671  * @adapter: board private structure
 672  * @vlan: vlan tag
 673  *
 674  * Returns ptr to the filter object or NULL
 675  **/
 676 static struct
 677 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 678 {
 679         struct i40evf_vlan_filter *f;
 680
 681         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 682                 if (vlan == f->vlan)
 683                         return f;
 684         }
 685         return NULL;
 686 }
 687
 688 /**
 689  * i40evf_add_vlan - Add a vlan filter to the list
 690  * @adapter: board private structure
 691  * @vlan: VLAN tag
 692  *
 693  * Returns ptr to the filter object or NULL when no memory available.
 694  **/
 695 static struct
 696 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 697 {
 698         struct i40evf_vlan_filter *f = NULL;
 699         int count = 50;
 700
 701         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 702                                 &adapter->crit_section)) {
 703                 udelay(1);
 704                 if (--count == 0)
 705                         goto out;
 706         }
 707
 708         f = i40evf_find_vlan(adapter, vlan);
 709         if (!f) {
 710                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 711                 if (!f)
 712                         goto clearout;
 713
 714                 f->vlan = vlan;
 715
 716                 INIT_LIST_HEAD(&f->list);
 717                 list_add(&f->list, &adapter->vlan_filter_list);
 718                 f->add = true;
 719                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 720         }
 721
 722 clearout:
 723         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 724 out:
 725         return f;
 726 }
 727
 728 /**
 729  * i40evf_del_vlan - Remove a vlan filter from the list
 730  * @adapter: board private structure
 731  * @vlan: VLAN tag
 732  **/
 733 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 734 {
 735         struct i40evf_vlan_filter *f;
 736         int count = 50;
 737
 738         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 739                                 &adapter->crit_section)) {
 740                 udelay(1);
 741                 if (--count == 0)
 742                         return;
 743         }
 744
 745         f = i40evf_find_vlan(adapter, vlan);
 746         if (f) {
 747                 f->remove = true;
 748                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 749         }
 750         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 751 }
 752
 753 /**
 754  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 755  * @netdev: network device struct
 756  * @vid: VLAN tag
 757  **/
 758 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 759                                   __always_unused __be16 proto, u16 vid)
 760 {
 761         struct i40evf_adapter *adapter = netdev_priv(netdev);
 762
 763         if (!VLAN_ALLOWED(adapter))
 764                 return -EIO;
 765         if (i40evf_add_vlan(adapter, vid) == NULL)
 766                 return -ENOMEM;
 767         return 0;
 768 }
 769
 770 /**
 771  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 772  * @netdev: network device struct
 773  * @vid: VLAN tag
 774  **/
 775 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 776                                    __always_unused __be16 proto, u16 vid)
 777 {
 778         struct i40evf_adapter *adapter = netdev_priv(netdev);
 779
 780         if (VLAN_ALLOWED(adapter)) {
 781                 i40evf_del_vlan(adapter, vid);
 782                 return 0;
 783         }
 784         return -EIO;
 785 }
 786
 787 /**
 788  * i40evf_find_filter - Search filter list for specific mac filter
 789  * @adapter: board private structure
 790  * @macaddr: the MAC address
 791  *
 792  * Returns ptr to the filter object or NULL
 793  **/
 794 static struct
 795 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 796                                       u8 *macaddr)
 797 {
 798         struct i40evf_mac_filter *f;
 799
 800         if (!macaddr)
 801                 return NULL;
 802
 803         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 804                 if (ether_addr_equal(macaddr, f->macaddr))
 805                         return f;
 806         }
 807         return NULL;
 808 }
 809
 810 /**
 811  * i40e_add_filter - Add a mac filter to the filter list
 812  * @adapter: board private structure
 813  * @macaddr: the MAC address
 814  *
 815  * Returns ptr to the filter object or NULL when no memory available.
 816  **/
 817 static struct
 818 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 819                                      u8 *macaddr)
 820 {
 821         struct i40evf_mac_filter *f;
 822         int count = 50;
 823
 824         if (!macaddr)
 825                 return NULL;
 826
 827         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 828                                 &adapter->crit_section)) {
 829                 udelay(1);
 830                 if (--count == 0)
 831                         return NULL;
 832         }
 833
 834         f = i40evf_find_filter(adapter, macaddr);
 835         if (!f) {
 836                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 837                 if (!f) {
 838                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 839                                   &adapter->crit_section);
 840                         return NULL;
 841                 }
 842
 843                 ether_addr_copy(f->macaddr, macaddr);
 844
 845                 list_add(&f->list, &adapter->mac_filter_list);
 846                 f->add = true;
 847                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 848         }
 849
 850         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 851         return f;
 852 }
 853
 854 /**
 855  * i40evf_set_mac - NDO callback to set port mac address
 856  * @netdev: network interface device structure
 857  * @p: pointer to an address structure
 858  *
 859  * Returns 0 on success, negative on failure
 860  **/
 861 static int i40evf_set_mac(struct net_device *netdev, void *p)
 862 {
 863         struct i40evf_adapter *adapter = netdev_priv(netdev);
 864         struct i40e_hw *hw = &adapter->hw;
 865         struct i40evf_mac_filter *f;
 866         struct sockaddr *addr = p;
 867
 868         if (!is_valid_ether_addr(addr->sa_data))
 869                 return -EADDRNOTAVAIL;
 870
 871         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 872                 return 0;
 873
 874         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 875                 return -EPERM;
 876
 877         f = i40evf_find_filter(adapter, hw->mac.addr);
 878         if (f) {
 879                 f->remove = true;
 880                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 881         }
 882
 883         f = i40evf_add_filter(adapter, addr->sa_data);
 884         if (f) {
 885                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 886                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 887         }
 888
 889         return (f == NULL) ? -ENOMEM : 0;
 890 }
 891
 892 /**
 893  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 894  * @netdev: network interface device structure
 895  **/
 896 static void i40evf_set_rx_mode(struct net_device *netdev)
 897 {
 898         struct i40evf_adapter *adapter = netdev_priv(netdev);
 899         struct i40evf_mac_filter *f, *ftmp;
 900         struct netdev_hw_addr *uca;
 901         struct netdev_hw_addr *mca;
 902         struct netdev_hw_addr *ha;
 903         int count = 50;
 904
 905         /* add addr if not already in the filter list */
 906         netdev_for_each_uc_addr(uca, netdev) {
 907                 i40evf_add_filter(adapter, uca->addr);
 908         }
 909         netdev_for_each_mc_addr(mca, netdev) {
 910                 i40evf_add_filter(adapter, mca->addr);
 911         }
 912
 913         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 914                                 &adapter->crit_section)) {
 915                 udelay(1);
 916                 if (--count == 0) {
 917                         dev_err(&adapter->pdev->dev,
 918                                 "Failed to get lock in %s\n", __func__);
 919                         return;
 920                 }
 921         }
 922         /* remove filter if not in netdev list */
 923         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 924                 netdev_for_each_mc_addr(mca, netdev)
 925                         if (ether_addr_equal(mca->addr, f->macaddr))
 926                                 goto bottom_of_search_loop;
 927
 928                 netdev_for_each_uc_addr(uca, netdev)
 929                         if (ether_addr_equal(uca->addr, f->macaddr))
 930                                 goto bottom_of_search_loop;
 931
 932                 for_each_dev_addr(netdev, ha)
 933                         if (ether_addr_equal(ha->addr, f->macaddr))
 934                                 goto bottom_of_search_loop;
 935
 936                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 937                         goto bottom_of_search_loop;
 938
 939                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 940                 f->remove = true;
 941                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 942
 943 bottom_of_search_loop:
 944                 continue;
 945         }
 946         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 947 }
 948
 949 /**
 950  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 951  * @adapter: board private structure
 952  **/
 953 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 954 {
 955         int q_idx;
 956         struct i40e_q_vector *q_vector;
 957         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 958
 959         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 960                 struct napi_struct *napi;
 961
 962                 q_vector = &adapter->q_vectors[q_idx];
 963                 napi = &q_vector->napi;
 964                 napi_enable(napi);
 965         }
 966 }
 967
 968 /**
 969  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 970  * @adapter: board private structure
 971  **/
 972 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 973 {
 974         int q_idx;
 975         struct i40e_q_vector *q_vector;
 976         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 977
 978         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 979                 q_vector = &adapter->q_vectors[q_idx];
 980                 napi_disable(&q_vector->napi);
 981         }
 982 }
 983
 984 /**
 985  * i40evf_configure - set up transmit and receive data structures
 986  * @adapter: board private structure
 987  **/
 988 static void i40evf_configure(struct i40evf_adapter *adapter)
 989 {
 990         struct net_device *netdev = adapter->netdev;
 991         int i;
 992
 993         i40evf_set_rx_mode(netdev);
 994
 995         i40evf_configure_tx(adapter);
 996         i40evf_configure_rx(adapter);
 997         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 998
 999         for (i = 0; i < adapter->num_active_queues; i++) {
1000                 struct i40e_ring *ring = &adapter->rx_rings[i];
1001
1002         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
1003                 i40evf_alloc_rx_headers(ring);
1004                 i40evf_alloc_rx_buffers_ps(ring, ring->count);
1005         } else {
1006                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
1007         }
1008                 ring->next_to_use = ring->count - 1;
1009                 writel(ring->next_to_use, ring->tail);
1010         }
1011 }
1012
1013 /**
1014  * i40evf_up_complete - Finish the last steps of bringing up a connection
1015  * @adapter: board private structure
1016  **/
1017 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1018 {
1019         adapter->state = __I40EVF_RUNNING;
1020         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1021
1022         i40evf_napi_enable_all(adapter);
1023
1024         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1025         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1026         return 0;
1027 }
1028
1029 /**
1030  * i40e_down - Shutdown the connection processing
1031  * @adapter: board private structure
1032  **/
1033 void i40evf_down(struct i40evf_adapter *adapter)
1034 {
1035         struct net_device *netdev = adapter->netdev;
1036         struct i40evf_mac_filter *f;
1037
1038         if (adapter->state <= __I40EVF_DOWN_PENDING)
1039                 return;
1040
1041         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1042                                 &adapter->crit_section))
1043                 usleep_range(500, 1000);
1044
1045         netif_carrier_off(netdev);
1046         netif_tx_disable(netdev);
1047         i40evf_napi_disable_all(adapter);
1048         i40evf_irq_disable(adapter);
1049
1050         /* remove all MAC filters */
1051         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1052                 f->remove = true;
1053         }
1054         /* remove all VLAN filters */
1055         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1056                 f->remove = true;
1057         }
1058         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1059             adapter->state != __I40EVF_RESETTING) {
1060                 /* cancel any current operation */
1061                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1062                 /* Schedule operations to close down the HW. Don't wait
1063                  * here for this to complete. The watchdog is still running
1064                  * and it will take care of this.
1065                  */
1066                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1067                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1068                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1069         }
1070
1071         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1072 }
1073
1074 /**
1075  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1076  * @adapter: board private structure
1077  * @vectors: number of vectors to request
1078  *
1079  * Work with the OS to set up the MSIX vectors needed.
1080  *
1081  * Returns 0 on success, negative on failure
1082  **/
1083 static int
1084 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1085 {
1086         int err, vector_threshold;
1087
1088         /* We'll want at least 3 (vector_threshold):
1089          * 0) Other (Admin Queue and link, mostly)
1090          * 1) TxQ[0] Cleanup
1091          * 2) RxQ[0] Cleanup
1092          */
1093         vector_threshold = MIN_MSIX_COUNT;
1094
1095         /* The more we get, the more we will assign to Tx/Rx Cleanup
1096          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1097          * Right now, we simply care about how many we'll get; we'll
1098          * set them up later while requesting irq's.
1099          */
1100         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1101                                     vector_threshold, vectors);
1102         if (err < 0) {
1103                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1104                 kfree(adapter->msix_entries);
1105                 adapter->msix_entries = NULL;
1106                 return err;
1107         }
1108
1109         /* Adjust for only the vectors we'll use, which is minimum
1110          * of max_msix_q_vectors + NONQ_VECS, or the number of
1111          * vectors we were allocated.
1112          */
1113         adapter->num_msix_vectors = err;
1114         return 0;
1115 }
1116
1117 /**
1118  * i40evf_free_queues - Free memory for all rings
1119  * @adapter: board private structure to initialize
1120  *
1121  * Free all of the memory associated with queue pairs.
1122  **/
1123 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1124 {
1125         if (!adapter->vsi_res)
1126                 return;
1127         kfree(adapter->tx_rings);
1128         adapter->tx_rings = NULL;
1129         kfree(adapter->rx_rings);
1130         adapter->rx_rings = NULL;
1131 }
1132
1133 /**
1134  * i40evf_alloc_queues - Allocate memory for all rings
1135  * @adapter: board private structure to initialize
1136  *
1137  * We allocate one ring per queue at run-time since we don't know the
1138  * number of queues at compile-time.  The polling_netdev array is
1139  * intended for Multiqueue, but should work fine with a single queue.
1140  **/
1141 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1142 {
1143         int i;
1144
1145         adapter->tx_rings = kcalloc(adapter->num_active_queues,
1146                                     sizeof(struct i40e_ring), GFP_KERNEL);
1147         if (!adapter->tx_rings)
1148                 goto err_out;
1149         adapter->rx_rings = kcalloc(adapter->num_active_queues,
1150                                     sizeof(struct i40e_ring), GFP_KERNEL);
1151         if (!adapter->rx_rings)
1152                 goto err_out;
1153
1154         for (i = 0; i < adapter->num_active_queues; i++) {
1155                 struct i40e_ring *tx_ring;
1156                 struct i40e_ring *rx_ring;
1157
1158                 tx_ring = &adapter->tx_rings[i];
1159
1160                 tx_ring->queue_index = i;
1161                 tx_ring->netdev = adapter->netdev;
1162                 tx_ring->dev = &adapter->pdev->dev;
1163                 tx_ring->count = adapter->tx_desc_count;
1164                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1165                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1166
1167                 rx_ring = &adapter->rx_rings[i];
1168                 rx_ring->queue_index = i;
1169                 rx_ring->netdev = adapter->netdev;
1170                 rx_ring->dev = &adapter->pdev->dev;
1171                 rx_ring->count = adapter->rx_desc_count;
1172         }
1173
1174         return 0;
1175
1176 err_out:
1177         i40evf_free_queues(adapter);
1178         return -ENOMEM;
1179 }
1180
1181 /**
1182  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1183  * @adapter: board private structure to initialize
1184  *
1185  * Attempt to configure the interrupts using the best available
1186  * capabilities of the hardware and the kernel.
1187  **/
1188 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1189 {
1190         int vector, v_budget;
1191         int pairs = 0;
1192         int err = 0;
1193
1194         if (!adapter->vsi_res) {
1195                 err = -EIO;
1196                 goto out;
1197         }
1198         pairs = adapter->num_active_queues;
1199
1200         /* It's easy to be greedy for MSI-X vectors, but it really
1201          * doesn't do us much good if we have a lot more vectors
1202          * than CPU's.  So let's be conservative and only ask for
1203          * (roughly) twice the number of vectors as there are CPU's.
1204          */
1205         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1206         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1207
1208         adapter->msix_entries = kcalloc(v_budget,
1209                                         sizeof(struct msix_entry), GFP_KERNEL);
1210         if (!adapter->msix_entries) {
1211                 err = -ENOMEM;
1212                 goto out;
1213         }
1214
1215         for (vector = 0; vector < v_budget; vector++)
1216                 adapter->msix_entries[vector].entry = vector;
1217
1218         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1219
1220 out:
1221         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1222         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1223         return err;
1224 }
1225
1226 /**
1227  * i40e_config_rss_aq - Prepare for RSS using AQ commands
1228  * @vsi: vsi structure
1229  * @seed: RSS hash seed
1230  * @lut: Lookup table
1231  * @lut_size: Lookup table size
1232  *
1233  * Return 0 on success, negative on failure
1234  **/
1235 static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1236                                 u8 *lut, u16 lut_size)
1237 {
1238         struct i40evf_adapter *adapter = vsi->back;
1239         struct i40e_hw *hw = &adapter->hw;
1240         int ret = 0;
1241
1242         if (!vsi->id)
1243                 return -EINVAL;
1244
1245         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1246                 /* bail because we already have a command pending */
1247                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1248                         adapter->current_op);
1249                 return -EBUSY;
1250         }
1251
1252         if (seed) {
1253                 struct i40e_aqc_get_set_rss_key_data *rss_key =
1254                         (struct i40e_aqc_get_set_rss_key_data *)seed;
1255                 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1256                 if (ret) {
1257                         dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1258                                 i40evf_stat_str(hw, ret),
1259                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1260                         return ret;
1261                 }
1262         }
1263
1264         if (lut) {
1265                 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1266                 if (ret) {
1267                         dev_err(&adapter->pdev->dev,
1268                                 "Cannot set RSS lut, err %s aq_err %s\n",
1269                                 i40evf_stat_str(hw, ret),
1270                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1271                         return ret;
1272                 }
1273         }
1274
1275         return ret;
1276 }
1277
1278 /**
1279  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1280  * @vsi: Pointer to vsi structure
1281  * @seed: RSS hash seed
1282  * @lut: Lookup table
1283  * @lut_size: Lookup table size
1284  *
1285  * Returns 0 on success, negative on failure
1286  **/
1287 static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1288                                  const u8 *lut, u16 lut_size)
1289 {
1290         struct i40evf_adapter *adapter = vsi->back;
1291         struct i40e_hw *hw = &adapter->hw;
1292         u16 i;
1293
1294         if (seed) {
1295                 u32 *seed_dw = (u32 *)seed;
1296
1297                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1298                         wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1299         }
1300
1301         if (lut) {
1302                 u32 *lut_dw = (u32 *)lut;
1303
1304                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1305                         return -EINVAL;
1306
1307                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1308                         wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
1309         }
1310         i40e_flush(hw);
1311
1312         return 0;
1313 }
1314
1315 /**
1316  *  * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
1317  *  @vsi: Pointer to vsi structure
1318  *  @seed: RSS hash seed
1319  *  @lut: Lookup table
1320  *  @lut_size: Lookup table size
1321  *
1322  *  Return 0 on success, negative on failure
1323  **/
1324 static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1325                              u8 *lut, u16 lut_size)
1326 {
1327         struct i40evf_adapter *adapter = vsi->back;
1328         struct i40e_hw *hw = &adapter->hw;
1329         int ret = 0;
1330
1331         if (seed) {
1332                 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1333                         (struct i40e_aqc_get_set_rss_key_data *)seed);
1334                 if (ret) {
1335                         dev_err(&adapter->pdev->dev,
1336                                 "Cannot get RSS key, err %s aq_err %s\n",
1337                                 i40evf_stat_str(hw, ret),
1338                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1339                         return ret;
1340                 }
1341         }
1342
1343         if (lut) {
1344                 ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
1345                 if (ret) {
1346                         dev_err(&adapter->pdev->dev,
1347                                 "Cannot get RSS lut, err %s aq_err %s\n",
1348                                 i40evf_stat_str(hw, ret),
1349                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1350                         return ret;
1351                 }
1352         }
1353
1354         return ret;
1355 }
1356
1357 /**
1358  *  * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1359  *  @vsi: Pointer to vsi structure
1360  *  @seed: RSS hash seed
1361  *  @lut: Lookup table
1362  *  @lut_size: Lookup table size
1363  *
1364  *  Returns 0 on success, negative on failure
1365  **/
1366 static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1367                               const u8 *lut, u16 lut_size)
1368 {
1369         struct i40evf_adapter *adapter = vsi->back;
1370         struct i40e_hw *hw = &adapter->hw;
1371         u16 i;
1372
1373         if (seed) {
1374                 u32 *seed_dw = (u32 *)seed;
1375
1376                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1377                         seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1378         }
1379
1380         if (lut) {
1381                 u32 *lut_dw = (u32 *)lut;
1382
1383                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1384                         return -EINVAL;
1385
1386                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1387                         lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1388         }
1389
1390         return 0;
1391 }
1392
1393 /**
1394  * i40evf_config_rss - Configure RSS keys and lut
1395  * @vsi: Pointer to vsi structure
1396  * @seed: RSS hash seed
1397  * @lut: Lookup table
1398  * @lut_size: Lookup table size
1399  *
1400  * Returns 0 on success, negative on failure
1401  **/
1402 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1403                       u8 *lut, u16 lut_size)
1404 {
1405         struct i40evf_adapter *adapter = vsi->back;
1406
1407         if (RSS_AQ(adapter))
1408                 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1409         else
1410                 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1411 }
1412
1413 /**
1414  * i40evf_get_rss - Get RSS keys and lut
1415  * @vsi: Pointer to vsi structure
1416  * @seed: RSS hash seed
1417  * @lut: Lookup table
1418  * @lut_size: Lookup table size
1419  *
1420  * Returns 0 on success, negative on failure
1421  **/
1422 int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1423 {
1424         struct i40evf_adapter *adapter = vsi->back;
1425
1426         if (RSS_AQ(adapter))
1427                 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1428         else
1429                 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1430 }
1431
1432 /**
1433  * i40evf_fill_rss_lut - Fill the lut with default values
1434  * @lut: Lookup table to be filled with
1435  * @rss_table_size: Lookup table size
1436  * @rss_size: Range of queue number for hashing
1437  **/
1438 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1439 {
1440         u16 i;
1441
1442         for (i = 0; i < rss_table_size; i++)
1443                 lut[i] = i % rss_size;
1444 }
1445
1446 /**
1447  * i40evf_init_rss - Prepare for RSS
1448  * @adapter: board private structure
1449  *
1450  * Return 0 on success, negative on failure
1451  **/
1452 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1453 {
1454         struct i40e_vsi *vsi = &adapter->vsi;
1455         struct i40e_hw *hw = &adapter->hw;
1456         u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1457         u64 hena;
1458         u8 *lut;
1459         int ret;
1460
1461         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1462         if (adapter->vf_res->vf_offload_flags &
1463                                         I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1464                 hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1465         else
1466                 hena = I40E_DEFAULT_RSS_HENA;
1467         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1468         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1469
1470         lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1471         if (!lut)
1472                 return -ENOMEM;
1473
1474         /* Use user configured lut if there is one, otherwise use default */
1475         if (vsi->rss_lut_user)
1476                 memcpy(lut, vsi->rss_lut_user, I40EVF_HLUT_ARRAY_SIZE);
1477         else
1478                 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1479                                     adapter->num_active_queues);
1480
1481         /* Use user configured hash key if there is one, otherwise
1482          * user default.
1483          */
1484         if (vsi->rss_hkey_user)
1485                 memcpy(seed, vsi->rss_hkey_user, I40EVF_HKEY_ARRAY_SIZE);
1486         else
1487                 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1488         ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1489         kfree(lut);
1490
1491         return ret;
1492 }
1493
1494 /**
1495  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1496  * @adapter: board private structure to initialize
1497  *
1498  * We allocate one q_vector per queue interrupt.  If allocation fails we
1499  * return -ENOMEM.
1500  **/
1501 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1502 {
1503         int q_idx = 0, num_q_vectors;
1504         struct i40e_q_vector *q_vector;
1505
1506         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1507         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1508                                      GFP_KERNEL);
1509         if (!adapter->q_vectors)
1510                 goto err_out;
1511
1512         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1513                 q_vector = &adapter->q_vectors[q_idx];
1514                 q_vector->adapter = adapter;
1515                 q_vector->vsi = &adapter->vsi;
1516                 q_vector->v_idx = q_idx;
1517                 netif_napi_add(adapter->netdev, &q_vector->napi,
1518                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1519         }
1520
1521         return 0;
1522
1523 err_out:
1524         while (q_idx) {
1525                 q_idx--;
1526                 q_vector = &adapter->q_vectors[q_idx];
1527                 netif_napi_del(&q_vector->napi);
1528         }
1529         kfree(adapter->q_vectors);
1530         return -ENOMEM;
1531 }
1532
1533 /**
1534  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1535  * @adapter: board private structure to initialize
1536  *
1537  * This function frees the memory allocated to the q_vectors.  In addition if
1538  * NAPI is enabled it will delete any references to the NAPI struct prior
1539  * to freeing the q_vector.
1540  **/
1541 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1542 {
1543         int q_idx, num_q_vectors;
1544         int napi_vectors;
1545
1546         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1547         napi_vectors = adapter->num_active_queues;
1548
1549         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1550                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1551                 if (q_idx < napi_vectors)
1552                         netif_napi_del(&q_vector->napi);
1553         }
1554         kfree(adapter->q_vectors);
1555 }
1556
1557 /**
1558  * i40evf_reset_interrupt_capability - Reset MSIX setup
1559  * @adapter: board private structure
1560  *
1561  **/
1562 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1563 {
1564         pci_disable_msix(adapter->pdev);
1565         kfree(adapter->msix_entries);
1566         adapter->msix_entries = NULL;
1567 }
1568
1569 /**
1570  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1571  * @adapter: board private structure to initialize
1572  *
1573  **/
1574 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1575 {
1576         int err;
1577
1578         err = i40evf_set_interrupt_capability(adapter);
1579         if (err) {
1580                 dev_err(&adapter->pdev->dev,
1581                         "Unable to setup interrupt capabilities\n");
1582                 goto err_set_interrupt;
1583         }
1584
1585         err = i40evf_alloc_q_vectors(adapter);
1586         if (err) {
1587                 dev_err(&adapter->pdev->dev,
1588                         "Unable to allocate memory for queue vectors\n");
1589                 goto err_alloc_q_vectors;
1590         }
1591
1592         err = i40evf_alloc_queues(adapter);
1593         if (err) {
1594                 dev_err(&adapter->pdev->dev,
1595                         "Unable to allocate memory for queues\n");
1596                 goto err_alloc_queues;
1597         }
1598
1599         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1600                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1601                  adapter->num_active_queues);
1602
1603         return 0;
1604 err_alloc_queues:
1605         i40evf_free_q_vectors(adapter);
1606 err_alloc_q_vectors:
1607         i40evf_reset_interrupt_capability(adapter);
1608 err_set_interrupt:
1609         return err;
1610 }
1611
1612 /**
1613  * i40evf_clear_rss_config_user - Clear user configurations of RSS
1614  * @vsi: Pointer to VSI structure
1615  **/
1616 static void i40evf_clear_rss_config_user(struct i40e_vsi *vsi)
1617 {
1618         if (!vsi)
1619                 return;
1620
1621         kfree(vsi->rss_hkey_user);
1622         vsi->rss_hkey_user = NULL;
1623
1624         kfree(vsi->rss_lut_user);
1625         vsi->rss_lut_user = NULL;
1626 }
1627
1628 /**
1629  * i40evf_watchdog_timer - Periodic call-back timer
1630  * @data: pointer to adapter disguised as unsigned long
1631  **/
1632 static void i40evf_watchdog_timer(unsigned long data)
1633 {
1634         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1635
1636         schedule_work(&adapter->watchdog_task);
1637         /* timer will be rescheduled in watchdog task */
1638 }
1639
1640 /**
1641  * i40evf_watchdog_task - Periodic call-back task
1642  * @work: pointer to work_struct
1643  **/
1644 static void i40evf_watchdog_task(struct work_struct *work)
1645 {
1646         struct i40evf_adapter *adapter = container_of(work,
1647                                                       struct i40evf_adapter,
1648                                                       watchdog_task);
1649         struct i40e_hw *hw = &adapter->hw;
1650         u32 reg_val;
1651
1652         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1653                 goto restart_watchdog;
1654
1655         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1656                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1657                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1658                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1659                     (reg_val == I40E_VFR_COMPLETED)) {
1660                         /* A chance for redemption! */
1661                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1662                         adapter->state = __I40EVF_STARTUP;
1663                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1664                         schedule_delayed_work(&adapter->init_task, 10);
1665                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1666                                   &adapter->crit_section);
1667                         /* Don't reschedule the watchdog, since we've restarted
1668                          * the init task. When init_task contacts the PF and
1669                          * gets everything set up again, it'll restart the
1670                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1671                          */
1672                         return;
1673                 }
1674                 adapter->aq_required = 0;
1675                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1676                 goto watchdog_done;
1677         }
1678
1679         if ((adapter->state < __I40EVF_DOWN) ||
1680             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1681                 goto watchdog_done;
1682
1683         /* check for reset */
1684         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1685         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1686                 adapter->state = __I40EVF_RESETTING;
1687                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1688                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1689                 schedule_work(&adapter->reset_task);
1690                 adapter->aq_required = 0;
1691                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1692                 goto watchdog_done;
1693         }
1694
1695         /* Process admin queue tasks. After init, everything gets done
1696          * here so we don't race on the admin queue.
1697          */
1698         if (adapter->current_op) {
1699                 if (!i40evf_asq_done(hw)) {
1700                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1701                         i40evf_send_api_ver(adapter);
1702                 }
1703                 goto watchdog_done;
1704         }
1705         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1706                 i40evf_send_vf_config_msg(adapter);
1707                 goto watchdog_done;
1708         }
1709
1710         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1711                 i40evf_disable_queues(adapter);
1712                 goto watchdog_done;
1713         }
1714
1715         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1716                 i40evf_map_queues(adapter);
1717                 goto watchdog_done;
1718         }
1719
1720         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1721                 i40evf_add_ether_addrs(adapter);
1722                 goto watchdog_done;
1723         }
1724
1725         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1726                 i40evf_add_vlans(adapter);
1727                 goto watchdog_done;
1728         }
1729
1730         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1731                 i40evf_del_ether_addrs(adapter);
1732                 goto watchdog_done;
1733         }
1734
1735         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1736                 i40evf_del_vlans(adapter);
1737                 goto watchdog_done;
1738         }
1739
1740         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1741                 i40evf_configure_queues(adapter);
1742                 goto watchdog_done;
1743         }
1744
1745         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1746                 i40evf_enable_queues(adapter);
1747                 goto watchdog_done;
1748         }
1749
1750         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1751                 /* This message goes straight to the firmware, not the
1752                  * PF, so we don't have to set current_op as we will
1753                  * not get a response through the ARQ.
1754                  */
1755                 i40evf_init_rss(adapter);
1756                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1757                 goto watchdog_done;
1758         }
1759
1760         if (adapter->state == __I40EVF_RUNNING)
1761                 i40evf_request_stats(adapter);
1762 watchdog_done:
1763         if (adapter->state == __I40EVF_RUNNING) {
1764                 i40evf_irq_enable_queues(adapter, ~0);
1765                 i40evf_fire_sw_int(adapter, 0xFF);
1766         } else {
1767                 i40evf_fire_sw_int(adapter, 0x1);
1768         }
1769
1770         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1771 restart_watchdog:
1772         if (adapter->state == __I40EVF_REMOVE)
1773                 return;
1774         if (adapter->aq_required)
1775                 mod_timer(&adapter->watchdog_timer,
1776                           jiffies + msecs_to_jiffies(20));
1777         else
1778                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1779         schedule_work(&adapter->adminq_task);
1780 }
1781
1782 #define I40EVF_RESET_WAIT_MS 10
1783 #define I40EVF_RESET_WAIT_COUNT 500
1784 /**
1785  * i40evf_reset_task - Call-back task to handle hardware reset
1786  * @work: pointer to work_struct
1787  *
1788  * During reset we need to shut down and reinitialize the admin queue
1789  * before we can use it to communicate with the PF again. We also clear
1790  * and reinit the rings because that context is lost as well.
1791  **/
1792 static void i40evf_reset_task(struct work_struct *work)
1793 {
1794         struct i40evf_adapter *adapter = container_of(work,
1795                                                       struct i40evf_adapter,
1796                                                       reset_task);
1797         struct net_device *netdev = adapter->netdev;
1798         struct i40e_hw *hw = &adapter->hw;
1799         struct i40evf_vlan_filter *vlf;
1800         struct i40evf_mac_filter *f;
1801         u32 reg_val;
1802         int i = 0, err;
1803
1804         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1805                                 &adapter->crit_section))
1806                 usleep_range(500, 1000);
1807
1808         i40evf_misc_irq_disable(adapter);
1809         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1810                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1811                 /* Restart the AQ here. If we have been reset but didn't
1812                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1813                  */
1814                 i40evf_shutdown_adminq(hw);
1815                 i40evf_init_adminq(hw);
1816                 i40evf_request_reset(adapter);
1817         }
1818         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1819
1820         /* poll until we see the reset actually happen */
1821         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1822                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1823                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1824                 if (!reg_val)
1825                         break;
1826                 usleep_range(5000, 10000);
1827         }
1828         if (i == I40EVF_RESET_WAIT_COUNT) {
1829                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1830                 goto continue_reset; /* act like the reset happened */
1831         }
1832
1833         /* wait until the reset is complete and the PF is responding to us */
1834         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1835                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1836                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1837                 if (reg_val == I40E_VFR_VFACTIVE)
1838                         break;
1839                 msleep(I40EVF_RESET_WAIT_MS);
1840         }
1841         pci_set_master(adapter->pdev);
1842         /* extra wait to make sure minimum wait is met */
1843         msleep(I40EVF_RESET_WAIT_MS);
1844         if (i == I40EVF_RESET_WAIT_COUNT) {
1845                 struct i40evf_mac_filter *ftmp;
1846                 struct i40evf_vlan_filter *fv, *fvtmp;
1847
1848                 /* reset never finished */
1849                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1850                         reg_val);
1851                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1852
1853                 if (netif_running(adapter->netdev)) {
1854                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1855                         netif_carrier_off(netdev);
1856                         netif_tx_disable(netdev);
1857                         i40evf_napi_disable_all(adapter);
1858                         i40evf_irq_disable(adapter);
1859                         i40evf_free_traffic_irqs(adapter);
1860                         i40evf_free_all_tx_resources(adapter);
1861                         i40evf_free_all_rx_resources(adapter);
1862                 }
1863
1864                 /* Delete all of the filters, both MAC and VLAN. */
1865                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1866                                          list) {
1867                         list_del(&f->list);
1868                         kfree(f);
1869                 }
1870
1871                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1872                                          list) {
1873                         list_del(&fv->list);
1874                         kfree(fv);
1875                 }
1876
1877                 i40evf_free_misc_irq(adapter);
1878                 i40evf_reset_interrupt_capability(adapter);
1879                 i40evf_free_queues(adapter);
1880                 i40evf_free_q_vectors(adapter);
1881                 kfree(adapter->vf_res);
1882                 i40evf_shutdown_adminq(hw);
1883                 adapter->netdev->flags &= ~IFF_UP;
1884                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1885                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1886                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1887                 return; /* Do not attempt to reinit. It's dead, Jim. */
1888         }
1889
1890 continue_reset:
1891         if (netif_running(adapter->netdev)) {
1892                 netif_carrier_off(netdev);
1893                 netif_tx_stop_all_queues(netdev);
1894                 i40evf_napi_disable_all(adapter);
1895         }
1896         i40evf_irq_disable(adapter);
1897
1898         adapter->state = __I40EVF_RESETTING;
1899         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1900
1901         /* free the Tx/Rx rings and descriptors, might be better to just
1902          * re-use them sometime in the future
1903          */
1904         i40evf_free_all_rx_resources(adapter);
1905         i40evf_free_all_tx_resources(adapter);
1906
1907         /* kill and reinit the admin queue */
1908         if (i40evf_shutdown_adminq(hw))
1909                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1910         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1911         err = i40evf_init_adminq(hw);
1912         if (err)
1913                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1914                          err);
1915
1916         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1917         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1918
1919         /* re-add all MAC filters */
1920         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1921                 f->add = true;
1922         }
1923         /* re-add all VLAN filters */
1924         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1925                 vlf->add = true;
1926         }
1927         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1928         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1929         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1930         i40evf_misc_irq_enable(adapter);
1931
1932         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1933
1934         if (netif_running(adapter->netdev)) {
1935                 /* allocate transmit descriptors */
1936                 err = i40evf_setup_all_tx_resources(adapter);
1937                 if (err)
1938                         goto reset_err;
1939
1940                 /* allocate receive descriptors */
1941                 err = i40evf_setup_all_rx_resources(adapter);
1942                 if (err)
1943                         goto reset_err;
1944
1945                 i40evf_configure(adapter);
1946
1947                 err = i40evf_up_complete(adapter);
1948                 if (err)
1949                         goto reset_err;
1950
1951                 i40evf_irq_enable(adapter, true);
1952         } else {
1953                 adapter->state = __I40EVF_DOWN;
1954         }
1955
1956         return;
1957 reset_err:
1958         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1959         i40evf_close(adapter->netdev);
1960 }
1961
1962 /**
1963  * i40evf_adminq_task - worker thread to clean the admin queue
1964  * @work: pointer to work_struct containing our data
1965  **/
1966 static void i40evf_adminq_task(struct work_struct *work)
1967 {
1968         struct i40evf_adapter *adapter =
1969                 container_of(work, struct i40evf_adapter, adminq_task);
1970         struct i40e_hw *hw = &adapter->hw;
1971         struct i40e_arq_event_info event;
1972         struct i40e_virtchnl_msg *v_msg;
1973         i40e_status ret;
1974         u32 val, oldval;
1975         u16 pending;
1976
1977         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1978                 goto out;
1979
1980         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1981         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1982         if (!event.msg_buf)
1983                 goto out;
1984
1985         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1986         do {
1987                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1988                 if (ret || !v_msg->v_opcode)
1989                         break; /* No event to process or error cleaning ARQ */
1990
1991                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1992                                            v_msg->v_retval, event.msg_buf,
1993                                            event.msg_len);
1994                 if (pending != 0)
1995                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1996         } while (pending);
1997
1998         if ((adapter->flags &
1999              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
2000             adapter->state == __I40EVF_RESETTING)
2001                 goto freedom;
2002
2003         /* check for error indications */
2004         val = rd32(hw, hw->aq.arq.len);
2005         oldval = val;
2006         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
2007                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2008                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
2009         }
2010         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2011                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2012                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2013         }
2014         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2015                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2016                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2017         }
2018         if (oldval != val)
2019                 wr32(hw, hw->aq.arq.len, val);
2020
2021         val = rd32(hw, hw->aq.asq.len);
2022         oldval = val;
2023         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2024                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2025                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2026         }
2027         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2028                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2029                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2030         }
2031         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2032                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2033                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2034         }
2035         if (oldval != val)
2036                 wr32(hw, hw->aq.asq.len, val);
2037
2038 freedom:
2039         kfree(event.msg_buf);
2040 out:
2041         /* re-enable Admin queue interrupt cause */
2042         i40evf_misc_irq_enable(adapter);
2043 }
2044
2045 /**
2046  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2047  * @adapter: board private structure
2048  *
2049  * Free all transmit software resources
2050  **/
2051 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2052 {
2053         int i;
2054
2055         if (!adapter->tx_rings)
2056                 return;
2057
2058         for (i = 0; i < adapter->num_active_queues; i++)
2059                 if (adapter->tx_rings[i].desc)
2060                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
2061 }
2062
2063 /**
2064  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2065  * @adapter: board private structure
2066  *
2067  * If this function returns with an error, then it's possible one or
2068  * more of the rings is populated (while the rest are not).  It is the
2069  * callers duty to clean those orphaned rings.
2070  *
2071  * Return 0 on success, negative on failure
2072  **/
2073 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2074 {
2075         int i, err = 0;
2076
2077         for (i = 0; i < adapter->num_active_queues; i++) {
2078                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2079                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2080                 if (!err)
2081                         continue;
2082                 dev_err(&adapter->pdev->dev,
2083                         "Allocation for Tx Queue %u failed\n", i);
2084                 break;
2085         }
2086
2087         return err;
2088 }
2089
2090 /**
2091  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2092  * @adapter: board private structure
2093  *
2094  * If this function returns with an error, then it's possible one or
2095  * more of the rings is populated (while the rest are not).  It is the
2096  * callers duty to clean those orphaned rings.
2097  *
2098  * Return 0 on success, negative on failure
2099  **/
2100 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2101 {
2102         int i, err = 0;
2103
2104         for (i = 0; i < adapter->num_active_queues; i++) {
2105                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2106                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2107                 if (!err)
2108                         continue;
2109                 dev_err(&adapter->pdev->dev,
2110                         "Allocation for Rx Queue %u failed\n", i);
2111                 break;
2112         }
2113         return err;
2114 }
2115
2116 /**
2117  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2118  * @adapter: board private structure
2119  *
2120  * Free all receive software resources
2121  **/
2122 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2123 {
2124         int i;
2125
2126         if (!adapter->rx_rings)
2127                 return;
2128
2129         for (i = 0; i < adapter->num_active_queues; i++)
2130                 if (adapter->rx_rings[i].desc)
2131                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2132 }
2133
2134 /**
2135  * i40evf_open - Called when a network interface is made active
2136  * @netdev: network interface device structure
2137  *
2138  * Returns 0 on success, negative value on failure
2139  *
2140  * The open entry point is called when a network interface is made
2141  * active by the system (IFF_UP).  At this point all resources needed
2142  * for transmit and receive operations are allocated, the interrupt
2143  * handler is registered with the OS, the watchdog timer is started,
2144  * and the stack is notified that the interface is ready.
2145  **/
2146 static int i40evf_open(struct net_device *netdev)
2147 {
2148         struct i40evf_adapter *adapter = netdev_priv(netdev);
2149         int err;
2150
2151         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2152                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2153                 return -EIO;
2154         }
2155
2156         if (adapter->state != __I40EVF_DOWN)
2157                 return -EBUSY;
2158
2159         /* allocate transmit descriptors */
2160         err = i40evf_setup_all_tx_resources(adapter);
2161         if (err)
2162                 goto err_setup_tx;
2163
2164         /* allocate receive descriptors */
2165         err = i40evf_setup_all_rx_resources(adapter);
2166         if (err)
2167                 goto err_setup_rx;
2168
2169         /* clear any pending interrupts, may auto mask */
2170         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2171         if (err)
2172                 goto err_req_irq;
2173
2174         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2175         i40evf_configure(adapter);
2176
2177         err = i40evf_up_complete(adapter);
2178         if (err)
2179                 goto err_req_irq;
2180
2181         i40evf_irq_enable(adapter, true);
2182
2183         return 0;
2184
2185 err_req_irq:
2186         i40evf_down(adapter);
2187         i40evf_free_traffic_irqs(adapter);
2188 err_setup_rx:
2189         i40evf_free_all_rx_resources(adapter);
2190 err_setup_tx:
2191         i40evf_free_all_tx_resources(adapter);
2192
2193         return err;
2194 }
2195
2196 /**
2197  * i40evf_close - Disables a network interface
2198  * @netdev: network interface device structure
2199  *
2200  * Returns 0, this is not allowed to fail
2201  *
2202  * The close entry point is called when an interface is de-activated
2203  * by the OS.  The hardware is still under the drivers control, but
2204  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2205  * are freed, along with all transmit and receive resources.
2206  **/
2207 static int i40evf_close(struct net_device *netdev)
2208 {
2209         struct i40evf_adapter *adapter = netdev_priv(netdev);
2210
2211         if (adapter->state <= __I40EVF_DOWN_PENDING)
2212                 return 0;
2213
2214
2215         set_bit(__I40E_DOWN, &adapter->vsi.state);
2216
2217         i40evf_down(adapter);
2218         adapter->state = __I40EVF_DOWN_PENDING;
2219         i40evf_free_traffic_irqs(adapter);
2220
2221         return 0;
2222 }
2223
2224 /**
2225  * i40evf_get_stats - Get System Network Statistics
2226  * @netdev: network interface device structure
2227  *
2228  * Returns the address of the device statistics structure.
2229  * The statistics are actually updated from the timer callback.
2230  **/
2231 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2232 {
2233         struct i40evf_adapter *adapter = netdev_priv(netdev);
2234
2235         /* only return the current stats */
2236         return &adapter->net_stats;
2237 }
2238
2239 /**
2240  * i40evf_change_mtu - Change the Maximum Transfer Unit
2241  * @netdev: network interface device structure
2242  * @new_mtu: new value for maximum frame size
2243  *
2244  * Returns 0 on success, negative on failure
2245  **/
2246 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2247 {
2248         struct i40evf_adapter *adapter = netdev_priv(netdev);
2249         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2250
2251         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2252                 return -EINVAL;
2253
2254         netdev->mtu = new_mtu;
2255         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2256         schedule_work(&adapter->reset_task);
2257
2258         return 0;
2259 }
2260
2261 static const struct net_device_ops i40evf_netdev_ops = {
2262         .ndo_open               = i40evf_open,
2263         .ndo_stop               = i40evf_close,
2264         .ndo_start_xmit         = i40evf_xmit_frame,
2265         .ndo_get_stats          = i40evf_get_stats,
2266         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2267         .ndo_validate_addr      = eth_validate_addr,
2268         .ndo_set_mac_address    = i40evf_set_mac,
2269         .ndo_change_mtu         = i40evf_change_mtu,
2270         .ndo_tx_timeout         = i40evf_tx_timeout,
2271         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2272         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2273 #ifdef CONFIG_NET_POLL_CONTROLLER
2274         .ndo_poll_controller    = i40evf_netpoll,
2275 #endif
2276 };
2277
2278 /**
2279  * i40evf_check_reset_complete - check that VF reset is complete
2280  * @hw: pointer to hw struct
2281  *
2282  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2283  **/
2284 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2285 {
2286         u32 rstat;
2287         int i;
2288
2289         for (i = 0; i < 100; i++) {
2290                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2291                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2292                 if ((rstat == I40E_VFR_VFACTIVE) ||
2293                     (rstat == I40E_VFR_COMPLETED))
2294                         return 0;
2295                 usleep_range(10, 20);
2296         }
2297         return -EBUSY;
2298 }
2299
2300 /**
2301  * i40evf_process_config - Process the config information we got from the PF
2302  * @adapter: board private structure
2303  *
2304  * Verify that we have a valid config struct, and set up our netdev features
2305  * and our VSI struct.
2306  **/
2307 int i40evf_process_config(struct i40evf_adapter *adapter)
2308 {
2309         struct net_device *netdev = adapter->netdev;
2310         int i;
2311
2312         /* got VF config message back from PF, now we can parse it */
2313         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2314                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2315                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2316         }
2317         if (!adapter->vsi_res) {
2318                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2319                 return -ENODEV;
2320         }
2321
2322         if (adapter->vf_res->vf_offload_flags
2323             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2324                 netdev->vlan_features = netdev->features &
2325                                         ~(NETIF_F_HW_VLAN_CTAG_TX |
2326                                           NETIF_F_HW_VLAN_CTAG_RX |
2327                                           NETIF_F_HW_VLAN_CTAG_FILTER);
2328                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2329                                     NETIF_F_HW_VLAN_CTAG_RX |
2330                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2331         }
2332         netdev->features |= NETIF_F_HIGHDMA |
2333                             NETIF_F_SG |
2334                             NETIF_F_IP_CSUM |
2335                             NETIF_F_SCTP_CRC |
2336                             NETIF_F_IPV6_CSUM |
2337                             NETIF_F_TSO |
2338                             NETIF_F_TSO6 |
2339                             NETIF_F_RXCSUM |
2340                             NETIF_F_GRO;
2341
2342         /* copy netdev features into list of user selectable features */
2343         netdev->hw_features |= netdev->features;
2344         netdev->hw_features &= ~NETIF_F_RXCSUM;
2345
2346         adapter->vsi.id = adapter->vsi_res->vsi_id;
2347
2348         adapter->vsi.back = adapter;
2349         adapter->vsi.base_vector = 1;
2350         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2351         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2352                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2353         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2354                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2355         adapter->vsi.netdev = adapter->netdev;
2356         adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2357         return 0;
2358 }
2359
2360 /**
2361  * i40evf_init_task - worker thread to perform delayed initialization
2362  * @work: pointer to work_struct containing our data
2363  *
2364  * This task completes the work that was begun in probe. Due to the nature
2365  * of VF-PF communications, we may need to wait tens of milliseconds to get
2366  * responses back from the PF. Rather than busy-wait in probe and bog down the
2367  * whole system, we'll do it in a task so we can sleep.
2368  * This task only runs during driver init. Once we've established
2369  * communications with the PF driver and set up our netdev, the watchdog
2370  * takes over.
2371  **/
2372 static void i40evf_init_task(struct work_struct *work)
2373 {
2374         struct i40evf_adapter *adapter = container_of(work,
2375                                                       struct i40evf_adapter,
2376                                                       init_task.work);
2377         struct net_device *netdev = adapter->netdev;
2378         struct i40e_hw *hw = &adapter->hw;
2379         struct pci_dev *pdev = adapter->pdev;
2380         int err, bufsz;
2381
2382         switch (adapter->state) {
2383         case __I40EVF_STARTUP:
2384                 /* driver loaded, probe complete */
2385                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2386                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2387                 err = i40e_set_mac_type(hw);
2388                 if (err) {
2389                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2390                                 err);
2391                         goto err;
2392                 }
2393                 err = i40evf_check_reset_complete(hw);
2394                 if (err) {
2395                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2396                                  err);
2397                         goto err;
2398                 }
2399                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2400                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2401                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2402                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2403
2404                 err = i40evf_init_adminq(hw);
2405                 if (err) {
2406                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2407                                 err);
2408                         goto err;
2409                 }
2410                 err = i40evf_send_api_ver(adapter);
2411                 if (err) {
2412                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2413                         i40evf_shutdown_adminq(hw);
2414                         goto err;
2415                 }
2416                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2417                 goto restart;
2418         case __I40EVF_INIT_VERSION_CHECK:
2419                 if (!i40evf_asq_done(hw)) {
2420                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2421                         i40evf_shutdown_adminq(hw);
2422                         adapter->state = __I40EVF_STARTUP;
2423                         goto err;
2424                 }
2425
2426                 /* aq msg sent, awaiting reply */
2427                 err = i40evf_verify_api_ver(adapter);
2428                 if (err) {
2429                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2430                                 err = i40evf_send_api_ver(adapter);
2431                         else
2432                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2433                                         adapter->pf_version.major,
2434                                         adapter->pf_version.minor,
2435                                         I40E_VIRTCHNL_VERSION_MAJOR,
2436                                         I40E_VIRTCHNL_VERSION_MINOR);
2437                         goto err;
2438                 }
2439                 err = i40evf_send_vf_config_msg(adapter);
2440                 if (err) {
2441                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2442                                 err);
2443                         goto err;
2444                 }
2445                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2446                 goto restart;
2447         case __I40EVF_INIT_GET_RESOURCES:
2448                 /* aq msg sent, awaiting reply */
2449                 if (!adapter->vf_res) {
2450                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2451                                 (I40E_MAX_VF_VSI *
2452                                  sizeof(struct i40e_virtchnl_vsi_resource));
2453                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2454                         if (!adapter->vf_res)
2455                                 goto err;
2456                 }
2457                 err = i40evf_get_vf_config(adapter);
2458                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2459                         err = i40evf_send_vf_config_msg(adapter);
2460                         goto err;
2461                 } else if (err == I40E_ERR_PARAM) {
2462                         /* We only get ERR_PARAM if the device is in a very bad
2463                          * state or if we've been disabled for previous bad
2464                          * behavior. Either way, we're done now.
2465                          */
2466                         i40evf_shutdown_adminq(hw);
2467                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2468                         return;
2469                 }
2470                 if (err) {
2471                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2472                                 err);
2473                         goto err_alloc;
2474                 }
2475                 adapter->state = __I40EVF_INIT_SW;
2476                 break;
2477         default:
2478                 goto err_alloc;
2479         }
2480         if (i40evf_process_config(adapter))
2481                 goto err_alloc;
2482         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2483
2484         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2485         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
2486         adapter->flags |= I40EVF_FLAG_RX_PS_CAPABLE;
2487
2488         /* Default to single buffer rx, can be changed through ethtool. */
2489         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
2490
2491         netdev->netdev_ops = &i40evf_netdev_ops;
2492         i40evf_set_ethtool_ops(netdev);
2493         netdev->watchdog_timeo = 5 * HZ;
2494
2495         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2496                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2497                          adapter->hw.mac.addr);
2498                 eth_hw_addr_random(netdev);
2499                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2500         } else {
2501                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2502                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2503                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2504         }
2505
2506         init_timer(&adapter->watchdog_timer);
2507         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2508         adapter->watchdog_timer.data = (unsigned long)adapter;
2509         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2510
2511         adapter->num_active_queues = min_t(int,
2512                                            adapter->vsi_res->num_queue_pairs,
2513                                            (int)(num_online_cpus()));
2514         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2515         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2516         err = i40evf_init_interrupt_scheme(adapter);
2517         if (err)
2518                 goto err_sw_init;
2519         i40evf_map_rings_to_vectors(adapter);
2520         if (adapter->vf_res->vf_offload_flags &
2521                     I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2522                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2523
2524         if (adapter->vf_res->vf_offload_flags &
2525             I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2526                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2527
2528         err = i40evf_request_misc_irq(adapter);
2529         if (err)
2530                 goto err_sw_init;
2531
2532         netif_carrier_off(netdev);
2533
2534         if (!adapter->netdev_registered) {
2535                 err = register_netdev(netdev);
2536                 if (err)
2537                         goto err_register;
2538         }
2539
2540         adapter->netdev_registered = true;
2541
2542         netif_tx_stop_all_queues(netdev);
2543
2544         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2545         if (netdev->features & NETIF_F_GRO)
2546                 dev_info(&pdev->dev, "GRO is enabled\n");
2547
2548         adapter->state = __I40EVF_DOWN;
2549         set_bit(__I40E_DOWN, &adapter->vsi.state);
2550         i40evf_misc_irq_enable(adapter);
2551
2552         if (RSS_AQ(adapter)) {
2553                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2554                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2555         } else {
2556                 i40evf_init_rss(adapter);
2557         }
2558         return;
2559 restart:
2560         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2561         return;
2562
2563 err_register:
2564         i40evf_free_misc_irq(adapter);
2565 err_sw_init:
2566         i40evf_reset_interrupt_capability(adapter);
2567 err_alloc:
2568         kfree(adapter->vf_res);
2569         adapter->vf_res = NULL;
2570 err:
2571         /* Things went into the weeds, so try again later */
2572         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2573                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2574                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2575                 i40evf_shutdown_adminq(hw);
2576                 adapter->state = __I40EVF_STARTUP;
2577                 schedule_delayed_work(&adapter->init_task, HZ * 5);
2578                 return;
2579         }
2580         schedule_delayed_work(&adapter->init_task, HZ);
2581 }
2582
2583 /**
2584  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2585  * @pdev: pci device structure
2586  **/
2587 static void i40evf_shutdown(struct pci_dev *pdev)
2588 {
2589         struct net_device *netdev = pci_get_drvdata(pdev);
2590         struct i40evf_adapter *adapter = netdev_priv(netdev);
2591
2592         netif_device_detach(netdev);
2593
2594         if (netif_running(netdev))
2595                 i40evf_close(netdev);
2596
2597         /* Prevent the watchdog from running. */
2598         adapter->state = __I40EVF_REMOVE;
2599         adapter->aq_required = 0;
2600
2601 #ifdef CONFIG_PM
2602         pci_save_state(pdev);
2603
2604 #endif
2605         pci_disable_device(pdev);
2606 }
2607
2608 /**
2609  * i40evf_probe - Device Initialization Routine
2610  * @pdev: PCI device information struct
2611  * @ent: entry in i40evf_pci_tbl
2612  *
2613  * Returns 0 on success, negative on failure
2614  *
2615  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2616  * The OS initialization, configuring of the adapter private structure,
2617  * and a hardware reset occur.
2618  **/
2619 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2620 {
2621         struct net_device *netdev;
2622         struct i40evf_adapter *adapter = NULL;
2623         struct i40e_hw *hw = NULL;
2624         int err;
2625
2626         err = pci_enable_device(pdev);
2627         if (err)
2628                 return err;
2629
2630         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2631         if (err) {
2632                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2633                 if (err) {
2634                         dev_err(&pdev->dev,
2635                                 "DMA configuration failed: 0x%x\n", err);
2636                         goto err_dma;
2637                 }
2638         }
2639
2640         err = pci_request_regions(pdev, i40evf_driver_name);
2641         if (err) {
2642                 dev_err(&pdev->dev,
2643                         "pci_request_regions failed 0x%x\n", err);
2644                 goto err_pci_reg;
2645         }
2646
2647         pci_enable_pcie_error_reporting(pdev);
2648
2649         pci_set_master(pdev);
2650
2651         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2652         if (!netdev) {
2653                 err = -ENOMEM;
2654                 goto err_alloc_etherdev;
2655         }
2656
2657         SET_NETDEV_DEV(netdev, &pdev->dev);
2658
2659         pci_set_drvdata(pdev, netdev);
2660         adapter = netdev_priv(netdev);
2661
2662         adapter->netdev = netdev;
2663         adapter->pdev = pdev;
2664
2665         hw = &adapter->hw;
2666         hw->back = adapter;
2667
2668         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2669         adapter->state = __I40EVF_STARTUP;
2670
2671         /* Call save state here because it relies on the adapter struct. */
2672         pci_save_state(pdev);
2673
2674         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2675                               pci_resource_len(pdev, 0));
2676         if (!hw->hw_addr) {
2677                 err = -EIO;
2678                 goto err_ioremap;
2679         }
2680         hw->vendor_id = pdev->vendor;
2681         hw->device_id = pdev->device;
2682         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2683         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2684         hw->subsystem_device_id = pdev->subsystem_device;
2685         hw->bus.device = PCI_SLOT(pdev->devfn);
2686         hw->bus.func = PCI_FUNC(pdev->devfn);
2687
2688         /* set up the locks for the AQ, do this only once in probe
2689          * and destroy them only once in remove
2690          */
2691         mutex_init(&hw->aq.asq_mutex);
2692         mutex_init(&hw->aq.arq_mutex);
2693
2694         INIT_LIST_HEAD(&adapter->mac_filter_list);
2695         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2696
2697         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2698         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2699         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2700         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2701         schedule_delayed_work(&adapter->init_task,
2702                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2703
2704         return 0;
2705
2706 err_ioremap:
2707         free_netdev(netdev);
2708 err_alloc_etherdev:
2709         pci_release_regions(pdev);
2710 err_pci_reg:
2711 err_dma:
2712         pci_disable_device(pdev);
2713         return err;
2714 }
2715
2716 #ifdef CONFIG_PM
2717 /**
2718  * i40evf_suspend - Power management suspend routine
2719  * @pdev: PCI device information struct
2720  * @state: unused
2721  *
2722  * Called when the system (VM) is entering sleep/suspend.
2723  **/
2724 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2725 {
2726         struct net_device *netdev = pci_get_drvdata(pdev);
2727         struct i40evf_adapter *adapter = netdev_priv(netdev);
2728         int retval = 0;
2729
2730         netif_device_detach(netdev);
2731
2732         if (netif_running(netdev)) {
2733                 rtnl_lock();
2734                 i40evf_down(adapter);
2735                 rtnl_unlock();
2736         }
2737         i40evf_free_misc_irq(adapter);
2738         i40evf_reset_interrupt_capability(adapter);
2739
2740         retval = pci_save_state(pdev);
2741         if (retval)
2742                 return retval;
2743
2744         pci_disable_device(pdev);
2745
2746         return 0;
2747 }
2748
2749 /**
2750  * i40evf_resume - Power management resume routine
2751  * @pdev: PCI device information struct
2752  *
2753  * Called when the system (VM) is resumed from sleep/suspend.
2754  **/
2755 static int i40evf_resume(struct pci_dev *pdev)
2756 {
2757         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2758         struct net_device *netdev = adapter->netdev;
2759         u32 err;
2760
2761         pci_set_power_state(pdev, PCI_D0);
2762         pci_restore_state(pdev);
2763         /* pci_restore_state clears dev->state_saved so call
2764          * pci_save_state to restore it.
2765          */
2766         pci_save_state(pdev);
2767
2768         err = pci_enable_device_mem(pdev);
2769         if (err) {
2770                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2771                 return err;
2772         }
2773         pci_set_master(pdev);
2774
2775         rtnl_lock();
2776         err = i40evf_set_interrupt_capability(adapter);
2777         if (err) {
2778                 rtnl_unlock();
2779                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2780                 return err;
2781         }
2782         err = i40evf_request_misc_irq(adapter);
2783         rtnl_unlock();
2784         if (err) {
2785                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2786                 return err;
2787         }
2788
2789         schedule_work(&adapter->reset_task);
2790
2791         netif_device_attach(netdev);
2792
2793         return err;
2794 }
2795
2796 #endif /* CONFIG_PM */
2797 /**
2798  * i40evf_remove - Device Removal Routine
2799  * @pdev: PCI device information struct
2800  *
2801  * i40evf_remove is called by the PCI subsystem to alert the driver
2802  * that it should release a PCI device.  The could be caused by a
2803  * Hot-Plug event, or because the driver is going to be removed from
2804  * memory.
2805  **/
2806 static void i40evf_remove(struct pci_dev *pdev)
2807 {
2808         struct net_device *netdev = pci_get_drvdata(pdev);
2809         struct i40evf_adapter *adapter = netdev_priv(netdev);
2810         struct i40evf_mac_filter *f, *ftmp;
2811         struct i40e_hw *hw = &adapter->hw;
2812
2813         cancel_delayed_work_sync(&adapter->init_task);
2814         cancel_work_sync(&adapter->reset_task);
2815
2816         if (adapter->netdev_registered) {
2817                 unregister_netdev(netdev);
2818                 adapter->netdev_registered = false;
2819         }
2820
2821         /* Shut down all the garbage mashers on the detention level */
2822         adapter->state = __I40EVF_REMOVE;
2823         adapter->aq_required = 0;
2824         i40evf_request_reset(adapter);
2825         msleep(20);
2826         /* If the FW isn't responding, kick it once, but only once. */
2827         if (!i40evf_asq_done(hw)) {
2828                 i40evf_request_reset(adapter);
2829                 msleep(20);
2830         }
2831
2832         if (adapter->msix_entries) {
2833                 i40evf_misc_irq_disable(adapter);
2834                 i40evf_free_misc_irq(adapter);
2835                 i40evf_reset_interrupt_capability(adapter);
2836                 i40evf_free_q_vectors(adapter);
2837         }
2838
2839         if (adapter->watchdog_timer.function)
2840                 del_timer_sync(&adapter->watchdog_timer);
2841
2842         flush_scheduled_work();
2843
2844         /* Clear user configurations for RSS */
2845         i40evf_clear_rss_config_user(&adapter->vsi);
2846
2847         if (hw->aq.asq.count)
2848                 i40evf_shutdown_adminq(hw);
2849
2850         /* destroy the locks only once, here */
2851         mutex_destroy(&hw->aq.arq_mutex);
2852         mutex_destroy(&hw->aq.asq_mutex);
2853
2854         iounmap(hw->hw_addr);
2855         pci_release_regions(pdev);
2856
2857         i40evf_free_all_tx_resources(adapter);
2858         i40evf_free_all_rx_resources(adapter);
2859         i40evf_free_queues(adapter);
2860         kfree(adapter->vf_res);
2861         /* If we got removed before an up/down sequence, we've got a filter
2862          * hanging out there that we need to get rid of.
2863          */
2864         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2865                 list_del(&f->list);
2866                 kfree(f);
2867         }
2868         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2869                 list_del(&f->list);
2870                 kfree(f);
2871         }
2872
2873         free_netdev(netdev);
2874
2875         pci_disable_pcie_error_reporting(pdev);
2876
2877         pci_disable_device(pdev);
2878 }
2879
2880 static struct pci_driver i40evf_driver = {
2881         .name     = i40evf_driver_name,
2882         .id_table = i40evf_pci_tbl,
2883         .probe    = i40evf_probe,
2884         .remove   = i40evf_remove,
2885 #ifdef CONFIG_PM
2886         .suspend  = i40evf_suspend,
2887         .resume   = i40evf_resume,
2888 #endif
2889         .shutdown = i40evf_shutdown,
2890 };
2891
2892 /**
2893  * i40e_init_module - Driver Registration Routine
2894  *
2895  * i40e_init_module is the first routine called when the driver is
2896  * loaded. All it does is register with the PCI subsystem.
2897  **/
2898 static int __init i40evf_init_module(void)
2899 {
2900         int ret;
2901
2902         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2903                 i40evf_driver_version);
2904
2905         pr_info("%s\n", i40evf_copyright);
2906
2907         i40evf_wq = create_singlethread_workqueue(i40evf_driver_name);
2908         if (!i40evf_wq) {
2909                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2910                 return -ENOMEM;
2911         }
2912         ret = pci_register_driver(&i40evf_driver);
2913         return ret;
2914 }
2915
2916 module_init(i40evf_init_module);
2917
2918 /**
2919  * i40e_exit_module - Driver Exit Cleanup Routine
2920  *
2921  * i40e_exit_module is called just before the driver is removed
2922  * from memory.
2923  **/
2924 static void __exit i40evf_exit_module(void)
2925 {
2926         pci_unregister_driver(&i40evf_driver);
2927         destroy_workqueue(i40evf_wq);
2928 }
2929
2930 module_exit(i40evf_exit_module);
2931
2932 /* i40evf_main.c */