drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2012 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 with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28
  29 /******************************************************************************
  30  Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
  31 ******************************************************************************/
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/types.h>
  36 #include <linux/bitops.h>
  37 #include <linux/module.h>
  38 #include <linux/pci.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/string.h>
  42 #include <linux/in.h>
  43 #include <linux/ip.h>
  44 #include <linux/tcp.h>
  45 #include <linux/sctp.h>
  46 #include <linux/ipv6.h>
  47 #include <linux/slab.h>
  48 #include <net/checksum.h>
  49 #include <net/ip6_checksum.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/if.h>
  52 #include <linux/if_vlan.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "ixgbevf.h"
  56
  57 const char ixgbevf_driver_name[] = "ixgbevf";
  58 static const char ixgbevf_driver_string[] =
  59         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  60
  61 #define DRV_VERSION "2.7.12-k"
  62 const char ixgbevf_driver_version[] = DRV_VERSION;
  63 static char ixgbevf_copyright[] =
  64         "Copyright (c) 2009 - 2012 Intel Corporation.";
  65
  66 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  67         [board_82599_vf] = &ixgbevf_82599_vf_info,
  68         [board_X540_vf]  = &ixgbevf_X540_vf_info,
  69 };
  70
  71 /* ixgbevf_pci_tbl - PCI Device ID Table
  72  *
  73  * Wildcard entries (PCI_ANY_ID) should come last
  74  * Last entry must be all 0s
  75  *
  76  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  77  *   Class, Class Mask, private data (not used) }
  78  */
  79 static DEFINE_PCI_DEVICE_TABLE(ixgbevf_pci_tbl) = {
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  81         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  82         /* required last entry */
  83         {0, }
  84 };
  85 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  86
  87 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  88 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
  89 MODULE_LICENSE("GPL");
  90 MODULE_VERSION(DRV_VERSION);
  91
  92 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  93 static int debug = -1;
  94 module_param(debug, int, 0);
  95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  96
  97 /* forward decls */
  98 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
  99 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 100
 101 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
 102                                            struct ixgbevf_ring *rx_ring,
 103                                            u32 val)
 104 {
 105         /*
 106          * Force memory writes to complete before letting h/w
 107          * know there are new descriptors to fetch.  (Only
 108          * applicable for weak-ordered memory model archs,
 109          * such as IA-64).
 110          */
 111         wmb();
 112         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 113 }
 114
 115 /**
 116  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 117  * @adapter: pointer to adapter struct
 118  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 119  * @queue: queue to map the corresponding interrupt to
 120  * @msix_vector: the vector to map to the corresponding queue
 121  */
 122 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 123                              u8 queue, u8 msix_vector)
 124 {
 125         u32 ivar, index;
 126         struct ixgbe_hw *hw = &adapter->hw;
 127         if (direction == -1) {
 128                 /* other causes */
 129                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 130                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 131                 ivar &= ~0xFF;
 132                 ivar |= msix_vector;
 133                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 134         } else {
 135                 /* tx or rx causes */
 136                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 137                 index = ((16 * (queue & 1)) + (8 * direction));
 138                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 139                 ivar &= ~(0xFF << index);
 140                 ivar |= (msix_vector << index);
 141                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 142         }
 143 }
 144
 145 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
 146                                                struct ixgbevf_tx_buffer
 147                                                *tx_buffer_info)
 148 {
 149         if (tx_buffer_info->dma) {
 150                 if (tx_buffer_info->mapped_as_page)
 151                         dma_unmap_page(tx_ring->dev,
 152                                        tx_buffer_info->dma,
 153                                        tx_buffer_info->length,
 154                                        DMA_TO_DEVICE);
 155                 else
 156                         dma_unmap_single(tx_ring->dev,
 157                                          tx_buffer_info->dma,
 158                                          tx_buffer_info->length,
 159                                          DMA_TO_DEVICE);
 160                 tx_buffer_info->dma = 0;
 161         }
 162         if (tx_buffer_info->skb) {
 163                 dev_kfree_skb_any(tx_buffer_info->skb);
 164                 tx_buffer_info->skb = NULL;
 165         }
 166         tx_buffer_info->time_stamp = 0;
 167         /* tx_buffer_info must be completely set up in the transmit path */
 168 }
 169
 170 #define IXGBE_MAX_TXD_PWR       14
 171 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 172
 173 /* Tx Descriptors needed, worst case */
 174 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
 175 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
 176
 177 static void ixgbevf_tx_timeout(struct net_device *netdev);
 178
 179 /**
 180  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 181  * @q_vector: board private structure
 182  * @tx_ring: tx ring to clean
 183  **/
 184 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 185                                  struct ixgbevf_ring *tx_ring)
 186 {
 187         struct ixgbevf_adapter *adapter = q_vector->adapter;
 188         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 189         struct ixgbevf_tx_buffer *tx_buffer_info;
 190         unsigned int i, count = 0;
 191         unsigned int total_bytes = 0, total_packets = 0;
 192
 193         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 194                 return true;
 195
 196         i = tx_ring->next_to_clean;
 197         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 198         eop_desc = tx_buffer_info->next_to_watch;
 199
 200         do {
 201                 bool cleaned = false;
 202
 203                 /* if next_to_watch is not set then there is no work pending */
 204                 if (!eop_desc)
 205                         break;
 206
 207                 /* prevent any other reads prior to eop_desc */
 208                 read_barrier_depends();
 209
 210                 /* if DD is not set pending work has not been completed */
 211                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 212                         break;
 213
 214                 /* clear next_to_watch to prevent false hangs */
 215                 tx_buffer_info->next_to_watch = NULL;
 216
 217                 for ( ; !cleaned; count++) {
 218                         struct sk_buff *skb;
 219                         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 220                         cleaned = (tx_desc == eop_desc);
 221                         skb = tx_buffer_info->skb;
 222
 223                         if (cleaned && skb) {
 224                                 unsigned int segs, bytecount;
 225
 226                                 /* gso_segs is currently only valid for tcp */
 227                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 228                                 /* multiply data chunks by size of headers */
 229                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 230                                             skb->len;
 231                                 total_packets += segs;
 232                                 total_bytes += bytecount;
 233                         }
 234
 235                         ixgbevf_unmap_and_free_tx_resource(tx_ring,
 236                                                            tx_buffer_info);
 237
 238                         tx_desc->wb.status = 0;
 239
 240                         i++;
 241                         if (i == tx_ring->count)
 242                                 i = 0;
 243
 244                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 245                 }
 246
 247                 eop_desc = tx_buffer_info->next_to_watch;
 248         } while (count < tx_ring->count);
 249
 250         tx_ring->next_to_clean = i;
 251
 252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 253         if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
 254                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 255                 /* Make sure that anybody stopping the queue after this
 256                  * sees the new next_to_clean.
 257                  */
 258                 smp_mb();
 259                 if (__netif_subqueue_stopped(tx_ring->netdev,
 260                                              tx_ring->queue_index) &&
 261                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 262                         netif_wake_subqueue(tx_ring->netdev,
 263                                             tx_ring->queue_index);
 264                         ++adapter->restart_queue;
 265                 }
 266         }
 267
 268         u64_stats_update_begin(&tx_ring->syncp);
 269         tx_ring->total_bytes += total_bytes;
 270         tx_ring->total_packets += total_packets;
 271         u64_stats_update_end(&tx_ring->syncp);
 272         q_vector->tx.total_bytes += total_bytes;
 273         q_vector->tx.total_packets += total_packets;
 274
 275         return count < tx_ring->count;
 276 }
 277
 278 /**
 279  * ixgbevf_receive_skb - Send a completed packet up the stack
 280  * @q_vector: structure containing interrupt and ring information
 281  * @skb: packet to send up
 282  * @status: hardware indication of status of receive
 283  * @rx_desc: rx descriptor
 284  **/
 285 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
 286                                 struct sk_buff *skb, u8 status,
 287                                 union ixgbe_adv_rx_desc *rx_desc)
 288 {
 289         struct ixgbevf_adapter *adapter = q_vector->adapter;
 290         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 291         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 292
 293         if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
 294                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
 295
 296         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
 297                 napi_gro_receive(&q_vector->napi, skb);
 298         else
 299                 netif_rx(skb);
 300 }
 301
 302 /**
 303  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 304  * @ring: pointer to Rx descriptor ring structure
 305  * @status_err: hardware indication of status of receive
 306  * @skb: skb currently being received and modified
 307  **/
 308 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 309                                        u32 status_err, struct sk_buff *skb)
 310 {
 311         skb_checksum_none_assert(skb);
 312
 313         /* Rx csum disabled */
 314         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 315                 return;
 316
 317         /* if IP and error */
 318         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 319             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 320                 ring->hw_csum_rx_error++;
 321                 return;
 322         }
 323
 324         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 325                 return;
 326
 327         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 328                 ring->hw_csum_rx_error++;
 329                 return;
 330         }
 331
 332         /* It must be a TCP or UDP packet with a valid checksum */
 333         skb->ip_summed = CHECKSUM_UNNECESSARY;
 334         ring->hw_csum_rx_good++;
 335 }
 336
 337 /**
 338  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 339  * @adapter: address of board private structure
 340  **/
 341 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 342                                      struct ixgbevf_ring *rx_ring,
 343                                      int cleaned_count)
 344 {
 345         struct pci_dev *pdev = adapter->pdev;
 346         union ixgbe_adv_rx_desc *rx_desc;
 347         struct ixgbevf_rx_buffer *bi;
 348         unsigned int i = rx_ring->next_to_use;
 349
 350         bi = &rx_ring->rx_buffer_info[i];
 351
 352         while (cleaned_count--) {
 353                 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 354
 355                 if (!bi->skb) {
 356                         struct sk_buff *skb;
 357
 358                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 359                                                         rx_ring->rx_buf_len);
 360                         if (!skb) {
 361                                 adapter->alloc_rx_buff_failed++;
 362                                 goto no_buffers;
 363                         }
 364                         bi->skb = skb;
 365
 366                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 367                                                  rx_ring->rx_buf_len,
 368                                                  DMA_FROM_DEVICE);
 369                         if (dma_mapping_error(&pdev->dev, bi->dma)) {
 370                                 dev_kfree_skb(skb);
 371                                 bi->skb = NULL;
 372                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 373                                 break;
 374                         }
 375                 }
 376                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 377
 378                 i++;
 379                 if (i == rx_ring->count)
 380                         i = 0;
 381                 bi = &rx_ring->rx_buffer_info[i];
 382         }
 383
 384 no_buffers:
 385         if (rx_ring->next_to_use != i) {
 386                 rx_ring->next_to_use = i;
 387                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 388         }
 389 }
 390
 391 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 392                                              u32 qmask)
 393 {
 394         struct ixgbe_hw *hw = &adapter->hw;
 395
 396         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 397 }
 398
 399 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 400                                  struct ixgbevf_ring *rx_ring,
 401                                  int budget)
 402 {
 403         struct ixgbevf_adapter *adapter = q_vector->adapter;
 404         struct pci_dev *pdev = adapter->pdev;
 405         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 406         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 407         struct sk_buff *skb;
 408         unsigned int i;
 409         u32 len, staterr;
 410         int cleaned_count = 0;
 411         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 412
 413         i = rx_ring->next_to_clean;
 414         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 415         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 416         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 417
 418         while (staterr & IXGBE_RXD_STAT_DD) {
 419                 if (!budget)
 420                         break;
 421                 budget--;
 422
 423                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 424                 len = le16_to_cpu(rx_desc->wb.upper.length);
 425                 skb = rx_buffer_info->skb;
 426                 prefetch(skb->data - NET_IP_ALIGN);
 427                 rx_buffer_info->skb = NULL;
 428
 429                 if (rx_buffer_info->dma) {
 430                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 431                                          rx_ring->rx_buf_len,
 432                                          DMA_FROM_DEVICE);
 433                         rx_buffer_info->dma = 0;
 434                         skb_put(skb, len);
 435                 }
 436
 437                 i++;
 438                 if (i == rx_ring->count)
 439                         i = 0;
 440
 441                 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
 442                 prefetch(next_rxd);
 443                 cleaned_count++;
 444
 445                 next_buffer = &rx_ring->rx_buffer_info[i];
 446
 447                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 448                         skb->next = next_buffer->skb;
 449                         IXGBE_CB(skb->next)->prev = skb;
 450                         adapter->non_eop_descs++;
 451                         goto next_desc;
 452                 }
 453
 454                 /* we should not be chaining buffers, if we did drop the skb */
 455                 if (IXGBE_CB(skb)->prev) {
 456                         do {
 457                                 struct sk_buff *this = skb;
 458                                 skb = IXGBE_CB(skb)->prev;
 459                                 dev_kfree_skb(this);
 460                         } while (skb);
 461                         goto next_desc;
 462                 }
 463
 464                 /* ERR_MASK will only have valid bits if EOP set */
 465                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 466                         dev_kfree_skb_irq(skb);
 467                         goto next_desc;
 468                 }
 469
 470                 ixgbevf_rx_checksum(rx_ring, staterr, skb);
 471
 472                 /* probably a little skewed due to removing CRC */
 473                 total_rx_bytes += skb->len;
 474                 total_rx_packets++;
 475
 476                 /*
 477                  * Work around issue of some types of VM to VM loop back
 478                  * packets not getting split correctly
 479                  */
 480                 if (staterr & IXGBE_RXD_STAT_LB) {
 481                         u32 header_fixup_len = skb_headlen(skb);
 482                         if (header_fixup_len < 14)
 483                                 skb_push(skb, header_fixup_len);
 484                 }
 485                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 486
 487                 /* Workaround hardware that can't do proper VEPA multicast
 488                  * source pruning.
 489                  */
 490                 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
 491                     ether_addr_equal(adapter->netdev->dev_addr,
 492                                      eth_hdr(skb)->h_source)) {
 493                         dev_kfree_skb_irq(skb);
 494                         goto next_desc;
 495                 }
 496
 497                 ixgbevf_receive_skb(q_vector, skb, staterr, rx_desc);
 498
 499 next_desc:
 500                 rx_desc->wb.upper.status_error = 0;
 501
 502                 /* return some buffers to hardware, one at a time is too slow */
 503                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 504                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 505                                                  cleaned_count);
 506                         cleaned_count = 0;
 507                 }
 508
 509                 /* use prefetched values */
 510                 rx_desc = next_rxd;
 511                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 512
 513                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 514         }
 515
 516         rx_ring->next_to_clean = i;
 517         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 518
 519         if (cleaned_count)
 520                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 521
 522         u64_stats_update_begin(&rx_ring->syncp);
 523         rx_ring->total_packets += total_rx_packets;
 524         rx_ring->total_bytes += total_rx_bytes;
 525         u64_stats_update_end(&rx_ring->syncp);
 526         q_vector->rx.total_packets += total_rx_packets;
 527         q_vector->rx.total_bytes += total_rx_bytes;
 528
 529         return !!budget;
 530 }
 531
 532 /**
 533  * ixgbevf_poll - NAPI polling calback
 534  * @napi: napi struct with our devices info in it
 535  * @budget: amount of work driver is allowed to do this pass, in packets
 536  *
 537  * This function will clean more than one or more rings associated with a
 538  * q_vector.
 539  **/
 540 static int ixgbevf_poll(struct napi_struct *napi, int budget)
 541 {
 542         struct ixgbevf_q_vector *q_vector =
 543                 container_of(napi, struct ixgbevf_q_vector, napi);
 544         struct ixgbevf_adapter *adapter = q_vector->adapter;
 545         struct ixgbevf_ring *ring;
 546         int per_ring_budget;
 547         bool clean_complete = true;
 548
 549         ixgbevf_for_each_ring(ring, q_vector->tx)
 550                 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
 551
 552         /* attempt to distribute budget to each queue fairly, but don't allow
 553          * the budget to go below 1 because we'll exit polling */
 554         if (q_vector->rx.count > 1)
 555                 per_ring_budget = max(budget/q_vector->rx.count, 1);
 556         else
 557                 per_ring_budget = budget;
 558
 559         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
 560         ixgbevf_for_each_ring(ring, q_vector->rx)
 561                 clean_complete &= ixgbevf_clean_rx_irq(q_vector, ring,
 562                                                        per_ring_budget);
 563         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
 564
 565         /* If all work not completed, return budget and keep polling */
 566         if (!clean_complete)
 567                 return budget;
 568         /* all work done, exit the polling mode */
 569         napi_complete(napi);
 570         if (adapter->rx_itr_setting & 1)
 571                 ixgbevf_set_itr(q_vector);
 572         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 573                 ixgbevf_irq_enable_queues(adapter,
 574                                           1 << q_vector->v_idx);
 575
 576         return 0;
 577 }
 578
 579 /**
 580  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 581  * @q_vector: structure containing interrupt and ring information
 582  */
 583 static void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
 584 {
 585         struct ixgbevf_adapter *adapter = q_vector->adapter;
 586         struct ixgbe_hw *hw = &adapter->hw;
 587         int v_idx = q_vector->v_idx;
 588         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
 589
 590         /*
 591          * set the WDIS bit to not clear the timer bits and cause an
 592          * immediate assertion of the interrupt
 593          */
 594         itr_reg |= IXGBE_EITR_CNT_WDIS;
 595
 596         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 597 }
 598
 599 /**
 600  * ixgbevf_configure_msix - Configure MSI-X hardware
 601  * @adapter: board private structure
 602  *
 603  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 604  * interrupts.
 605  **/
 606 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 607 {
 608         struct ixgbevf_q_vector *q_vector;
 609         int q_vectors, v_idx;
 610
 611         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 612         adapter->eims_enable_mask = 0;
 613
 614         /*
 615          * Populate the IVAR table and set the ITR values to the
 616          * corresponding register.
 617          */
 618         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 619                 struct ixgbevf_ring *ring;
 620                 q_vector = adapter->q_vector[v_idx];
 621
 622                 ixgbevf_for_each_ring(ring, q_vector->rx)
 623                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
 624
 625                 ixgbevf_for_each_ring(ring, q_vector->tx)
 626                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
 627
 628                 if (q_vector->tx.ring && !q_vector->rx.ring) {
 629                         /* tx only vector */
 630                         if (adapter->tx_itr_setting == 1)
 631                                 q_vector->itr = IXGBE_10K_ITR;
 632                         else
 633                                 q_vector->itr = adapter->tx_itr_setting;
 634                 } else {
 635                         /* rx or rx/tx vector */
 636                         if (adapter->rx_itr_setting == 1)
 637                                 q_vector->itr = IXGBE_20K_ITR;
 638                         else
 639                                 q_vector->itr = adapter->rx_itr_setting;
 640                 }
 641
 642                 /* add q_vector eims value to global eims_enable_mask */
 643                 adapter->eims_enable_mask |= 1 << v_idx;
 644
 645                 ixgbevf_write_eitr(q_vector);
 646         }
 647
 648         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 649         /* setup eims_other and add value to global eims_enable_mask */
 650         adapter->eims_other = 1 << v_idx;
 651         adapter->eims_enable_mask |= adapter->eims_other;
 652 }
 653
 654 enum latency_range {
 655         lowest_latency = 0,
 656         low_latency = 1,
 657         bulk_latency = 2,
 658         latency_invalid = 255
 659 };
 660
 661 /**
 662  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 663  * @q_vector: structure containing interrupt and ring information
 664  * @ring_container: structure containing ring performance data
 665  *
 666  *      Stores a new ITR value based on packets and byte
 667  *      counts during the last interrupt.  The advantage of per interrupt
 668  *      computation is faster updates and more accurate ITR for the current
 669  *      traffic pattern.  Constants in this function were computed
 670  *      based on theoretical maximum wire speed and thresholds were set based
 671  *      on testing data as well as attempting to minimize response time
 672  *      while increasing bulk throughput.
 673  **/
 674 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
 675                                struct ixgbevf_ring_container *ring_container)
 676 {
 677         int bytes = ring_container->total_bytes;
 678         int packets = ring_container->total_packets;
 679         u32 timepassed_us;
 680         u64 bytes_perint;
 681         u8 itr_setting = ring_container->itr;
 682
 683         if (packets == 0)
 684                 return;
 685
 686         /* simple throttlerate management
 687          *    0-20MB/s lowest (100000 ints/s)
 688          *   20-100MB/s low   (20000 ints/s)
 689          *  100-1249MB/s bulk (8000 ints/s)
 690          */
 691         /* what was last interrupt timeslice? */
 692         timepassed_us = q_vector->itr >> 2;
 693         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 694
 695         switch (itr_setting) {
 696         case lowest_latency:
 697                 if (bytes_perint > 10)
 698                         itr_setting = low_latency;
 699                 break;
 700         case low_latency:
 701                 if (bytes_perint > 20)
 702                         itr_setting = bulk_latency;
 703                 else if (bytes_perint <= 10)
 704                         itr_setting = lowest_latency;
 705                 break;
 706         case bulk_latency:
 707                 if (bytes_perint <= 20)
 708                         itr_setting = low_latency;
 709                 break;
 710         }
 711
 712         /* clear work counters since we have the values we need */
 713         ring_container->total_bytes = 0;
 714         ring_container->total_packets = 0;
 715
 716         /* write updated itr to ring container */
 717         ring_container->itr = itr_setting;
 718 }
 719
 720 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
 721 {
 722         u32 new_itr = q_vector->itr;
 723         u8 current_itr;
 724
 725         ixgbevf_update_itr(q_vector, &q_vector->tx);
 726         ixgbevf_update_itr(q_vector, &q_vector->rx);
 727
 728         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 729
 730         switch (current_itr) {
 731         /* counts and packets in update_itr are dependent on these numbers */
 732         case lowest_latency:
 733                 new_itr = IXGBE_100K_ITR;
 734                 break;
 735         case low_latency:
 736                 new_itr = IXGBE_20K_ITR;
 737                 break;
 738         case bulk_latency:
 739         default:
 740                 new_itr = IXGBE_8K_ITR;
 741                 break;
 742         }
 743
 744         if (new_itr != q_vector->itr) {
 745                 /* do an exponential smoothing */
 746                 new_itr = (10 * new_itr * q_vector->itr) /
 747                           ((9 * new_itr) + q_vector->itr);
 748
 749                 /* save the algorithm value here */
 750                 q_vector->itr = new_itr;
 751
 752                 ixgbevf_write_eitr(q_vector);
 753         }
 754 }
 755
 756 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
 757 {
 758         struct ixgbevf_adapter *adapter = data;
 759         struct pci_dev *pdev = adapter->pdev;
 760         struct ixgbe_hw *hw = &adapter->hw;
 761         u32 msg;
 762         bool got_ack = false;
 763
 764         hw->mac.get_link_status = 1;
 765         if (!hw->mbx.ops.check_for_ack(hw))
 766                 got_ack = true;
 767
 768         if (!hw->mbx.ops.check_for_msg(hw)) {
 769                 hw->mbx.ops.read(hw, &msg, 1);
 770
 771                 if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG) {
 772                         mod_timer(&adapter->watchdog_timer,
 773                                   round_jiffies(jiffies + 1));
 774                         adapter->link_up = false;
 775                 }
 776
 777                 if (msg & IXGBE_VT_MSGTYPE_NACK)
 778                         dev_info(&pdev->dev,
 779                                  "Last Request of type %2.2x to PF Nacked\n",
 780                                  msg & 0xFF);
 781                 hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFSTS;
 782         }
 783
 784         /* checking for the ack clears the PFACK bit.  Place
 785          * it back in the v2p_mailbox cache so that anyone
 786          * polling for an ack will not miss it
 787          */
 788         if (got_ack)
 789                 hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFACK;
 790
 791         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
 792
 793         return IRQ_HANDLED;
 794 }
 795
 796 /**
 797  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
 798  * @irq: unused
 799  * @data: pointer to our q_vector struct for this interrupt vector
 800  **/
 801 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
 802 {
 803         struct ixgbevf_q_vector *q_vector = data;
 804
 805         /* EIAM disabled interrupts (on this vector) for us */
 806         if (q_vector->rx.ring || q_vector->tx.ring)
 807                 napi_schedule(&q_vector->napi);
 808
 809         return IRQ_HANDLED;
 810 }
 811
 812 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
 813                                      int r_idx)
 814 {
 815         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 816
 817         a->rx_ring[r_idx].next = q_vector->rx.ring;
 818         q_vector->rx.ring = &a->rx_ring[r_idx];
 819         q_vector->rx.count++;
 820 }
 821
 822 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
 823                                      int t_idx)
 824 {
 825         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 826
 827         a->tx_ring[t_idx].next = q_vector->tx.ring;
 828         q_vector->tx.ring = &a->tx_ring[t_idx];
 829         q_vector->tx.count++;
 830 }
 831
 832 /**
 833  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
 834  * @adapter: board private structure to initialize
 835  *
 836  * This function maps descriptor rings to the queue-specific vectors
 837  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 838  * one vector per ring/queue, but on a constrained vector budget, we
 839  * group the rings as "efficiently" as possible.  You would add new
 840  * mapping configurations in here.
 841  **/
 842 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
 843 {
 844         int q_vectors;
 845         int v_start = 0;
 846         int rxr_idx = 0, txr_idx = 0;
 847         int rxr_remaining = adapter->num_rx_queues;
 848         int txr_remaining = adapter->num_tx_queues;
 849         int i, j;
 850         int rqpv, tqpv;
 851         int err = 0;
 852
 853         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 854
 855         /*
 856          * The ideal configuration...
 857          * We have enough vectors to map one per queue.
 858          */
 859         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
 860                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 861                         map_vector_to_rxq(adapter, v_start, rxr_idx);
 862
 863                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 864                         map_vector_to_txq(adapter, v_start, txr_idx);
 865                 goto out;
 866         }
 867
 868         /*
 869          * If we don't have enough vectors for a 1-to-1
 870          * mapping, we'll have to group them so there are
 871          * multiple queues per vector.
 872          */
 873         /* Re-adjusting *qpv takes care of the remainder. */
 874         for (i = v_start; i < q_vectors; i++) {
 875                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 876                 for (j = 0; j < rqpv; j++) {
 877                         map_vector_to_rxq(adapter, i, rxr_idx);
 878                         rxr_idx++;
 879                         rxr_remaining--;
 880                 }
 881         }
 882         for (i = v_start; i < q_vectors; i++) {
 883                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 884                 for (j = 0; j < tqpv; j++) {
 885                         map_vector_to_txq(adapter, i, txr_idx);
 886                         txr_idx++;
 887                         txr_remaining--;
 888                 }
 889         }
 890
 891 out:
 892         return err;
 893 }
 894
 895 /**
 896  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
 897  * @adapter: board private structure
 898  *
 899  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
 900  * interrupts from the kernel.
 901  **/
 902 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
 903 {
 904         struct net_device *netdev = adapter->netdev;
 905         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 906         int vector, err;
 907         int ri = 0, ti = 0;
 908
 909         for (vector = 0; vector < q_vectors; vector++) {
 910                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
 911                 struct msix_entry *entry = &adapter->msix_entries[vector];
 912
 913                 if (q_vector->tx.ring && q_vector->rx.ring) {
 914                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 915                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
 916                         ti++;
 917                 } else if (q_vector->rx.ring) {
 918                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 919                                  "%s-%s-%d", netdev->name, "rx", ri++);
 920                 } else if (q_vector->tx.ring) {
 921                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 922                                  "%s-%s-%d", netdev->name, "tx", ti++);
 923                 } else {
 924                         /* skip this unused q_vector */
 925                         continue;
 926                 }
 927                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
 928                                   q_vector->name, q_vector);
 929                 if (err) {
 930                         hw_dbg(&adapter->hw,
 931                                "request_irq failed for MSIX interrupt "
 932                                "Error: %d\n", err);
 933                         goto free_queue_irqs;
 934                 }
 935         }
 936
 937         err = request_irq(adapter->msix_entries[vector].vector,
 938                           &ixgbevf_msix_other, 0, netdev->name, adapter);
 939         if (err) {
 940                 hw_dbg(&adapter->hw,
 941                        "request_irq for msix_other failed: %d\n", err);
 942                 goto free_queue_irqs;
 943         }
 944
 945         return 0;
 946
 947 free_queue_irqs:
 948         while (vector) {
 949                 vector--;
 950                 free_irq(adapter->msix_entries[vector].vector,
 951                          adapter->q_vector[vector]);
 952         }
 953         /* This failure is non-recoverable - it indicates the system is
 954          * out of MSIX vector resources and the VF driver cannot run
 955          * without them.  Set the number of msix vectors to zero
 956          * indicating that not enough can be allocated.  The error
 957          * will be returned to the user indicating device open failed.
 958          * Any further attempts to force the driver to open will also
 959          * fail.  The only way to recover is to unload the driver and
 960          * reload it again.  If the system has recovered some MSIX
 961          * vectors then it may succeed.
 962          */
 963         adapter->num_msix_vectors = 0;
 964         return err;
 965 }
 966
 967 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
 968 {
 969         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 970
 971         for (i = 0; i < q_vectors; i++) {
 972                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
 973                 q_vector->rx.ring = NULL;
 974                 q_vector->tx.ring = NULL;
 975                 q_vector->rx.count = 0;
 976                 q_vector->tx.count = 0;
 977         }
 978 }
 979
 980 /**
 981  * ixgbevf_request_irq - initialize interrupts
 982  * @adapter: board private structure
 983  *
 984  * Attempts to configure interrupts using the best available
 985  * capabilities of the hardware and kernel.
 986  **/
 987 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
 988 {
 989         int err = 0;
 990
 991         err = ixgbevf_request_msix_irqs(adapter);
 992
 993         if (err)
 994                 hw_dbg(&adapter->hw,
 995                        "request_irq failed, Error %d\n", err);
 996
 997         return err;
 998 }
 999
1000 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1001 {
1002         int i, q_vectors;
1003
1004         q_vectors = adapter->num_msix_vectors;
1005         i = q_vectors - 1;
1006
1007         free_irq(adapter->msix_entries[i].vector, adapter);
1008         i--;
1009
1010         for (; i >= 0; i--) {
1011                 /* free only the irqs that were actually requested */
1012                 if (!adapter->q_vector[i]->rx.ring &&
1013                     !adapter->q_vector[i]->tx.ring)
1014                         continue;
1015
1016                 free_irq(adapter->msix_entries[i].vector,
1017                          adapter->q_vector[i]);
1018         }
1019
1020         ixgbevf_reset_q_vectors(adapter);
1021 }
1022
1023 /**
1024  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1025  * @adapter: board private structure
1026  **/
1027 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1028 {
1029         struct ixgbe_hw *hw = &adapter->hw;
1030         int i;
1031
1032         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1033         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1034         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1035
1036         IXGBE_WRITE_FLUSH(hw);
1037
1038         for (i = 0; i < adapter->num_msix_vectors; i++)
1039                 synchronize_irq(adapter->msix_entries[i].vector);
1040 }
1041
1042 /**
1043  * ixgbevf_irq_enable - Enable default interrupt generation settings
1044  * @adapter: board private structure
1045  **/
1046 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1047 {
1048         struct ixgbe_hw *hw = &adapter->hw;
1049
1050         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1051         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1052         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1053 }
1054
1055 /**
1056  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1057  * @adapter: board private structure
1058  *
1059  * Configure the Tx unit of the MAC after a reset.
1060  **/
1061 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1062 {
1063         u64 tdba;
1064         struct ixgbe_hw *hw = &adapter->hw;
1065         u32 i, j, tdlen, txctrl;
1066
1067         /* Setup the HW Tx Head and Tail descriptor pointers */
1068         for (i = 0; i < adapter->num_tx_queues; i++) {
1069                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1070                 j = ring->reg_idx;
1071                 tdba = ring->dma;
1072                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1073                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1074                                 (tdba & DMA_BIT_MASK(32)));
1075                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1076                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1077                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1078                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1079                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1080                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1081                 /* Disable Tx Head Writeback RO bit, since this hoses
1082                  * bookkeeping if things aren't delivered in order.
1083                  */
1084                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1085                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1086                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1087         }
1088 }
1089
1090 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1091
1092 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1093 {
1094         struct ixgbevf_ring *rx_ring;
1095         struct ixgbe_hw *hw = &adapter->hw;
1096         u32 srrctl;
1097
1098         rx_ring = &adapter->rx_ring[index];
1099
1100         srrctl = IXGBE_SRRCTL_DROP_EN;
1101
1102         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1103
1104         srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1105                   IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1106
1107         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1108 }
1109
1110 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1111 {
1112         struct ixgbe_hw *hw = &adapter->hw;
1113         struct net_device *netdev = adapter->netdev;
1114         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1115         int i;
1116         u16 rx_buf_len;
1117
1118         /* notify the PF of our intent to use this size of frame */
1119         ixgbevf_rlpml_set_vf(hw, max_frame);
1120
1121         /* PF will allow an extra 4 bytes past for vlan tagged frames */
1122         max_frame += VLAN_HLEN;
1123
1124         /*
1125          * Allocate buffer sizes that fit well into 32K and
1126          * take into account max frame size of 9.5K
1127          */
1128         if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1129             (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1130                 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1131         else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1132                 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1133         else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1134                 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1135         else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1136                 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1137         else
1138                 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1139
1140         for (i = 0; i < adapter->num_rx_queues; i++)
1141                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1142 }
1143
1144 /**
1145  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1146  * @adapter: board private structure
1147  *
1148  * Configure the Rx unit of the MAC after a reset.
1149  **/
1150 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1151 {
1152         u64 rdba;
1153         struct ixgbe_hw *hw = &adapter->hw;
1154         int i, j;
1155         u32 rdlen;
1156
1157         /* PSRTYPE must be initialized in 82599 */
1158         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1159
1160         /* set_rx_buffer_len must be called before ring initialization */
1161         ixgbevf_set_rx_buffer_len(adapter);
1162
1163         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1164         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1165          * the Base and Length of the Rx Descriptor Ring */
1166         for (i = 0; i < adapter->num_rx_queues; i++) {
1167                 rdba = adapter->rx_ring[i].dma;
1168                 j = adapter->rx_ring[i].reg_idx;
1169                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1170                                 (rdba & DMA_BIT_MASK(32)));
1171                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1172                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1173                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1174                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1175                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1176                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1177
1178                 ixgbevf_configure_srrctl(adapter, j);
1179         }
1180 }
1181
1182 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1183                                    __be16 proto, u16 vid)
1184 {
1185         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1186         struct ixgbe_hw *hw = &adapter->hw;
1187         int err;
1188
1189         spin_lock_bh(&adapter->mbx_lock);
1190
1191         /* add VID to filter table */
1192         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1193
1194         spin_unlock_bh(&adapter->mbx_lock);
1195
1196         /* translate error return types so error makes sense */
1197         if (err == IXGBE_ERR_MBX)
1198                 return -EIO;
1199
1200         if (err == IXGBE_ERR_INVALID_ARGUMENT)
1201                 return -EACCES;
1202
1203         set_bit(vid, adapter->active_vlans);
1204
1205         return err;
1206 }
1207
1208 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1209                                     __be16 proto, u16 vid)
1210 {
1211         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1212         struct ixgbe_hw *hw = &adapter->hw;
1213         int err = -EOPNOTSUPP;
1214
1215         spin_lock_bh(&adapter->mbx_lock);
1216
1217         /* remove VID from filter table */
1218         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1219
1220         spin_unlock_bh(&adapter->mbx_lock);
1221
1222         clear_bit(vid, adapter->active_vlans);
1223
1224         return err;
1225 }
1226
1227 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1228 {
1229         u16 vid;
1230
1231         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1232                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1233                                         htons(ETH_P_8021Q), vid);
1234 }
1235
1236 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1237 {
1238         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1239         struct ixgbe_hw *hw = &adapter->hw;
1240         int count = 0;
1241
1242         if ((netdev_uc_count(netdev)) > 10) {
1243                 pr_err("Too many unicast filters - No Space\n");
1244                 return -ENOSPC;
1245         }
1246
1247         if (!netdev_uc_empty(netdev)) {
1248                 struct netdev_hw_addr *ha;
1249                 netdev_for_each_uc_addr(ha, netdev) {
1250                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1251                         udelay(200);
1252                 }
1253         } else {
1254                 /*
1255                  * If the list is empty then send message to PF driver to
1256                  * clear all macvlans on this VF.
1257                  */
1258                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1259         }
1260
1261         return count;
1262 }
1263
1264 /**
1265  * ixgbevf_set_rx_mode - Multicast and unicast set
1266  * @netdev: network interface device structure
1267  *
1268  * The set_rx_method entry point is called whenever the multicast address
1269  * list, unicast address list or the network interface flags are updated.
1270  * This routine is responsible for configuring the hardware for proper
1271  * multicast mode and configuring requested unicast filters.
1272  **/
1273 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1274 {
1275         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1276         struct ixgbe_hw *hw = &adapter->hw;
1277
1278         spin_lock_bh(&adapter->mbx_lock);
1279
1280         /* reprogram multicast list */
1281         hw->mac.ops.update_mc_addr_list(hw, netdev);
1282
1283         ixgbevf_write_uc_addr_list(netdev);
1284
1285         spin_unlock_bh(&adapter->mbx_lock);
1286 }
1287
1288 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1289 {
1290         int q_idx;
1291         struct ixgbevf_q_vector *q_vector;
1292         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1293
1294         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1295                 q_vector = adapter->q_vector[q_idx];
1296                 napi_enable(&q_vector->napi);
1297         }
1298 }
1299
1300 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1301 {
1302         int q_idx;
1303         struct ixgbevf_q_vector *q_vector;
1304         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1305
1306         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1307                 q_vector = adapter->q_vector[q_idx];
1308                 napi_disable(&q_vector->napi);
1309         }
1310 }
1311
1312 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1313 {
1314         struct net_device *netdev = adapter->netdev;
1315         int i;
1316
1317         ixgbevf_set_rx_mode(netdev);
1318
1319         ixgbevf_restore_vlan(adapter);
1320
1321         ixgbevf_configure_tx(adapter);
1322         ixgbevf_configure_rx(adapter);
1323         for (i = 0; i < adapter->num_rx_queues; i++) {
1324                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1325                 ixgbevf_alloc_rx_buffers(adapter, ring,
1326                                          IXGBE_DESC_UNUSED(ring));
1327         }
1328 }
1329
1330 #define IXGBE_MAX_RX_DESC_POLL 10
1331 static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1332                                                 int rxr)
1333 {
1334         struct ixgbe_hw *hw = &adapter->hw;
1335         int j = adapter->rx_ring[rxr].reg_idx;
1336         int k;
1337
1338         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
1339                 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
1340                         break;
1341                 else
1342                         msleep(1);
1343         }
1344         if (k >= IXGBE_MAX_RX_DESC_POLL) {
1345                 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d "
1346                        "not set within the polling period\n", rxr);
1347         }
1348
1349         ixgbevf_release_rx_desc(hw, &adapter->rx_ring[rxr],
1350                                 adapter->rx_ring[rxr].count - 1);
1351 }
1352
1353 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1354 {
1355         /* Only save pre-reset stats if there are some */
1356         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1357                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1358                         adapter->stats.base_vfgprc;
1359                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1360                         adapter->stats.base_vfgptc;
1361                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1362                         adapter->stats.base_vfgorc;
1363                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1364                         adapter->stats.base_vfgotc;
1365                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1366                         adapter->stats.base_vfmprc;
1367         }
1368 }
1369
1370 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1371 {
1372         struct ixgbe_hw *hw = &adapter->hw;
1373
1374         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1375         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1376         adapter->stats.last_vfgorc |=
1377                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1378         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1379         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1380         adapter->stats.last_vfgotc |=
1381                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1382         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1383
1384         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1385         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1386         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1387         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1388         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1389 }
1390
1391 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1392 {
1393         struct ixgbe_hw *hw = &adapter->hw;
1394         int api[] = { ixgbe_mbox_api_11,
1395                       ixgbe_mbox_api_10,
1396                       ixgbe_mbox_api_unknown };
1397         int err = 0, idx = 0;
1398
1399         spin_lock_bh(&adapter->mbx_lock);
1400
1401         while (api[idx] != ixgbe_mbox_api_unknown) {
1402                 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1403                 if (!err)
1404                         break;
1405                 idx++;
1406         }
1407
1408         spin_unlock_bh(&adapter->mbx_lock);
1409 }
1410
1411 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1412 {
1413         struct net_device *netdev = adapter->netdev;
1414         struct ixgbe_hw *hw = &adapter->hw;
1415         int i, j = 0;
1416         int num_rx_rings = adapter->num_rx_queues;
1417         u32 txdctl, rxdctl;
1418
1419         for (i = 0; i < adapter->num_tx_queues; i++) {
1420                 j = adapter->tx_ring[i].reg_idx;
1421                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1422                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1423                 txdctl |= (8 << 16);
1424                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1425         }
1426
1427         for (i = 0; i < adapter->num_tx_queues; i++) {
1428                 j = adapter->tx_ring[i].reg_idx;
1429                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1430                 txdctl |= IXGBE_TXDCTL_ENABLE;
1431                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1432         }
1433
1434         for (i = 0; i < num_rx_rings; i++) {
1435                 j = adapter->rx_ring[i].reg_idx;
1436                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1437                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1438                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1439                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1440                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1441                                    IXGBE_RXDCTL_RLPML_EN);
1442                 }
1443                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1444                 ixgbevf_rx_desc_queue_enable(adapter, i);
1445         }
1446
1447         ixgbevf_configure_msix(adapter);
1448
1449         spin_lock_bh(&adapter->mbx_lock);
1450
1451         if (is_valid_ether_addr(hw->mac.addr))
1452                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1453         else
1454                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1455
1456         spin_unlock_bh(&adapter->mbx_lock);
1457
1458         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1459         ixgbevf_napi_enable_all(adapter);
1460
1461         /* enable transmits */
1462         netif_tx_start_all_queues(netdev);
1463
1464         ixgbevf_save_reset_stats(adapter);
1465         ixgbevf_init_last_counter_stats(adapter);
1466
1467         hw->mac.get_link_status = 1;
1468         mod_timer(&adapter->watchdog_timer, jiffies);
1469 }
1470
1471 static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter)
1472 {
1473         struct ixgbe_hw *hw = &adapter->hw;
1474         struct ixgbevf_ring *rx_ring;
1475         unsigned int def_q = 0;
1476         unsigned int num_tcs = 0;
1477         unsigned int num_rx_queues = 1;
1478         int err, i;
1479
1480         spin_lock_bh(&adapter->mbx_lock);
1481
1482         /* fetch queue configuration from the PF */
1483         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1484
1485         spin_unlock_bh(&adapter->mbx_lock);
1486
1487         if (err)
1488                 return err;
1489
1490         if (num_tcs > 1) {
1491                 /* update default Tx ring register index */
1492                 adapter->tx_ring[0].reg_idx = def_q;
1493
1494                 /* we need as many queues as traffic classes */
1495                 num_rx_queues = num_tcs;
1496         }
1497
1498         /* nothing to do if we have the correct number of queues */
1499         if (adapter->num_rx_queues == num_rx_queues)
1500                 return 0;
1501
1502         /* allocate new rings */
1503         rx_ring = kcalloc(num_rx_queues,
1504                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
1505         if (!rx_ring)
1506                 return -ENOMEM;
1507
1508         /* setup ring fields */
1509         for (i = 0; i < num_rx_queues; i++) {
1510                 rx_ring[i].count = adapter->rx_ring_count;
1511                 rx_ring[i].queue_index = i;
1512                 rx_ring[i].reg_idx = i;
1513                 rx_ring[i].dev = &adapter->pdev->dev;
1514                 rx_ring[i].netdev = adapter->netdev;
1515
1516                 /* allocate resources on the ring */
1517                 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
1518                 if (err) {
1519                         while (i) {
1520                                 i--;
1521                                 ixgbevf_free_rx_resources(adapter, &rx_ring[i]);
1522                         }
1523                         kfree(rx_ring);
1524                         return err;
1525                 }
1526         }
1527
1528         /* free the existing rings and queues */
1529         ixgbevf_free_all_rx_resources(adapter);
1530         adapter->num_rx_queues = 0;
1531         kfree(adapter->rx_ring);
1532
1533         /* move new rings into position on the adapter struct */
1534         adapter->rx_ring = rx_ring;
1535         adapter->num_rx_queues = num_rx_queues;
1536
1537         /* reset ring to vector mapping */
1538         ixgbevf_reset_q_vectors(adapter);
1539         ixgbevf_map_rings_to_vectors(adapter);
1540
1541         return 0;
1542 }
1543
1544 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1545 {
1546         struct ixgbe_hw *hw = &adapter->hw;
1547
1548         ixgbevf_negotiate_api(adapter);
1549
1550         ixgbevf_reset_queues(adapter);
1551
1552         ixgbevf_configure(adapter);
1553
1554         ixgbevf_up_complete(adapter);
1555
1556         /* clear any pending interrupts, may auto mask */
1557         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1558
1559         ixgbevf_irq_enable(adapter);
1560 }
1561
1562 /**
1563  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1564  * @adapter: board private structure
1565  * @rx_ring: ring to free buffers from
1566  **/
1567 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1568                                   struct ixgbevf_ring *rx_ring)
1569 {
1570         struct pci_dev *pdev = adapter->pdev;
1571         unsigned long size;
1572         unsigned int i;
1573
1574         if (!rx_ring->rx_buffer_info)
1575                 return;
1576
1577         /* Free all the Rx ring sk_buffs */
1578         for (i = 0; i < rx_ring->count; i++) {
1579                 struct ixgbevf_rx_buffer *rx_buffer_info;
1580
1581                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1582                 if (rx_buffer_info->dma) {
1583                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1584                                          rx_ring->rx_buf_len,
1585                                          DMA_FROM_DEVICE);
1586                         rx_buffer_info->dma = 0;
1587                 }
1588                 if (rx_buffer_info->skb) {
1589                         struct sk_buff *skb = rx_buffer_info->skb;
1590                         rx_buffer_info->skb = NULL;
1591                         do {
1592                                 struct sk_buff *this = skb;
1593                                 skb = IXGBE_CB(skb)->prev;
1594                                 dev_kfree_skb(this);
1595                         } while (skb);
1596                 }
1597         }
1598
1599         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1600         memset(rx_ring->rx_buffer_info, 0, size);
1601
1602         /* Zero out the descriptor ring */
1603         memset(rx_ring->desc, 0, rx_ring->size);
1604
1605         rx_ring->next_to_clean = 0;
1606         rx_ring->next_to_use = 0;
1607
1608         if (rx_ring->head)
1609                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1610         if (rx_ring->tail)
1611                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1612 }
1613
1614 /**
1615  * ixgbevf_clean_tx_ring - Free Tx Buffers
1616  * @adapter: board private structure
1617  * @tx_ring: ring to be cleaned
1618  **/
1619 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1620                                   struct ixgbevf_ring *tx_ring)
1621 {
1622         struct ixgbevf_tx_buffer *tx_buffer_info;
1623         unsigned long size;
1624         unsigned int i;
1625
1626         if (!tx_ring->tx_buffer_info)
1627                 return;
1628
1629         /* Free all the Tx ring sk_buffs */
1630         for (i = 0; i < tx_ring->count; i++) {
1631                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1632                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1633         }
1634
1635         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1636         memset(tx_ring->tx_buffer_info, 0, size);
1637
1638         memset(tx_ring->desc, 0, tx_ring->size);
1639
1640         tx_ring->next_to_use = 0;
1641         tx_ring->next_to_clean = 0;
1642
1643         if (tx_ring->head)
1644                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1645         if (tx_ring->tail)
1646                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1647 }
1648
1649 /**
1650  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1651  * @adapter: board private structure
1652  **/
1653 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1654 {
1655         int i;
1656
1657         for (i = 0; i < adapter->num_rx_queues; i++)
1658                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1659 }
1660
1661 /**
1662  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1663  * @adapter: board private structure
1664  **/
1665 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1666 {
1667         int i;
1668
1669         for (i = 0; i < adapter->num_tx_queues; i++)
1670                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1671 }
1672
1673 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1674 {
1675         struct net_device *netdev = adapter->netdev;
1676         struct ixgbe_hw *hw = &adapter->hw;
1677         u32 txdctl;
1678         int i, j;
1679
1680         /* signal that we are down to the interrupt handler */
1681         set_bit(__IXGBEVF_DOWN, &adapter->state);
1682         /* disable receives */
1683
1684         netif_tx_disable(netdev);
1685
1686         msleep(10);
1687
1688         netif_tx_stop_all_queues(netdev);
1689
1690         ixgbevf_irq_disable(adapter);
1691
1692         ixgbevf_napi_disable_all(adapter);
1693
1694         del_timer_sync(&adapter->watchdog_timer);
1695         /* can't call flush scheduled work here because it can deadlock
1696          * if linkwatch_event tries to acquire the rtnl_lock which we are
1697          * holding */
1698         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1699                 msleep(1);
1700
1701         /* disable transmits in the hardware now that interrupts are off */
1702         for (i = 0; i < adapter->num_tx_queues; i++) {
1703                 j = adapter->tx_ring[i].reg_idx;
1704                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1705                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1706                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1707         }
1708
1709         netif_carrier_off(netdev);
1710
1711         if (!pci_channel_offline(adapter->pdev))
1712                 ixgbevf_reset(adapter);
1713
1714         ixgbevf_clean_all_tx_rings(adapter);
1715         ixgbevf_clean_all_rx_rings(adapter);
1716 }
1717
1718 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1719 {
1720         WARN_ON(in_interrupt());
1721
1722         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1723                 msleep(1);
1724
1725         ixgbevf_down(adapter);
1726         ixgbevf_up(adapter);
1727
1728         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1729 }
1730
1731 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1732 {
1733         struct ixgbe_hw *hw = &adapter->hw;
1734         struct net_device *netdev = adapter->netdev;
1735
1736         if (hw->mac.ops.reset_hw(hw))
1737                 hw_dbg(hw, "PF still resetting\n");
1738         else
1739                 hw->mac.ops.init_hw(hw);
1740
1741         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1742                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1743                        netdev->addr_len);
1744                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1745                        netdev->addr_len);
1746         }
1747 }
1748
1749 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1750                                         int vectors)
1751 {
1752         int err = 0;
1753         int vector_threshold;
1754
1755         /* We'll want at least 2 (vector_threshold):
1756          * 1) TxQ[0] + RxQ[0] handler
1757          * 2) Other (Link Status Change, etc.)
1758          */
1759         vector_threshold = MIN_MSIX_COUNT;
1760
1761         /* The more we get, the more we will assign to Tx/Rx Cleanup
1762          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1763          * Right now, we simply care about how many we'll get; we'll
1764          * set them up later while requesting irq's.
1765          */
1766         while (vectors >= vector_threshold) {
1767                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1768                                       vectors);
1769                 if (!err || err < 0) /* Success or a nasty failure. */
1770                         break;
1771                 else /* err == number of vectors we should try again with */
1772                         vectors = err;
1773         }
1774
1775         if (vectors < vector_threshold)
1776                 err = -ENOMEM;
1777
1778         if (err) {
1779                 dev_err(&adapter->pdev->dev,
1780                         "Unable to allocate MSI-X interrupts\n");
1781                 kfree(adapter->msix_entries);
1782                 adapter->msix_entries = NULL;
1783         } else {
1784                 /*
1785                  * Adjust for only the vectors we'll use, which is minimum
1786                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1787                  * vectors we were allocated.
1788                  */
1789                 adapter->num_msix_vectors = vectors;
1790         }
1791
1792         return err;
1793 }
1794
1795 /**
1796  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1797  * @adapter: board private structure to initialize
1798  *
1799  * This is the top level queue allocation routine.  The order here is very
1800  * important, starting with the "most" number of features turned on at once,
1801  * and ending with the smallest set of features.  This way large combinations
1802  * can be allocated if they're turned on, and smaller combinations are the
1803  * fallthrough conditions.
1804  *
1805  **/
1806 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1807 {
1808         /* Start with base case */
1809         adapter->num_rx_queues = 1;
1810         adapter->num_tx_queues = 1;
1811 }
1812
1813 /**
1814  * ixgbevf_alloc_queues - Allocate memory for all rings
1815  * @adapter: board private structure to initialize
1816  *
1817  * We allocate one ring per queue at run-time since we don't know the
1818  * number of queues at compile-time.  The polling_netdev array is
1819  * intended for Multiqueue, but should work fine with a single queue.
1820  **/
1821 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1822 {
1823         int i;
1824
1825         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1826                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1827         if (!adapter->tx_ring)
1828                 goto err_tx_ring_allocation;
1829
1830         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1831                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1832         if (!adapter->rx_ring)
1833                 goto err_rx_ring_allocation;
1834
1835         for (i = 0; i < adapter->num_tx_queues; i++) {
1836                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1837                 adapter->tx_ring[i].queue_index = i;
1838                 /* reg_idx may be remapped later by DCB config */
1839                 adapter->tx_ring[i].reg_idx = i;
1840                 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1841                 adapter->tx_ring[i].netdev = adapter->netdev;
1842         }
1843
1844         for (i = 0; i < adapter->num_rx_queues; i++) {
1845                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1846                 adapter->rx_ring[i].queue_index = i;
1847                 adapter->rx_ring[i].reg_idx = i;
1848                 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1849                 adapter->rx_ring[i].netdev = adapter->netdev;
1850         }
1851
1852         return 0;
1853
1854 err_rx_ring_allocation:
1855         kfree(adapter->tx_ring);
1856 err_tx_ring_allocation:
1857         return -ENOMEM;
1858 }
1859
1860 /**
1861  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1862  * @adapter: board private structure to initialize
1863  *
1864  * Attempt to configure the interrupts using the best available
1865  * capabilities of the hardware and the kernel.
1866  **/
1867 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1868 {
1869         struct net_device *netdev = adapter->netdev;
1870         int err = 0;
1871         int vector, v_budget;
1872
1873         /*
1874          * It's easy to be greedy for MSI-X vectors, but it really
1875          * doesn't do us much good if we have a lot more vectors
1876          * than CPU's.  So let's be conservative and only ask for
1877          * (roughly) the same number of vectors as there are CPU's.
1878          * The default is to use pairs of vectors.
1879          */
1880         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1881         v_budget = min_t(int, v_budget, num_online_cpus());
1882         v_budget += NON_Q_VECTORS;
1883
1884         /* A failure in MSI-X entry allocation isn't fatal, but it does
1885          * mean we disable MSI-X capabilities of the adapter. */
1886         adapter->msix_entries = kcalloc(v_budget,
1887                                         sizeof(struct msix_entry), GFP_KERNEL);
1888         if (!adapter->msix_entries) {
1889                 err = -ENOMEM;
1890                 goto out;
1891         }
1892
1893         for (vector = 0; vector < v_budget; vector++)
1894                 adapter->msix_entries[vector].entry = vector;
1895
1896         err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
1897         if (err)
1898                 goto out;
1899
1900         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
1901         if (err)
1902                 goto out;
1903
1904         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
1905
1906 out:
1907         return err;
1908 }
1909
1910 /**
1911  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
1912  * @adapter: board private structure to initialize
1913  *
1914  * We allocate one q_vector per queue interrupt.  If allocation fails we
1915  * return -ENOMEM.
1916  **/
1917 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
1918 {
1919         int q_idx, num_q_vectors;
1920         struct ixgbevf_q_vector *q_vector;
1921
1922         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1923
1924         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1925                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
1926                 if (!q_vector)
1927                         goto err_out;
1928                 q_vector->adapter = adapter;
1929                 q_vector->v_idx = q_idx;
1930                 netif_napi_add(adapter->netdev, &q_vector->napi,
1931                                ixgbevf_poll, 64);
1932                 adapter->q_vector[q_idx] = q_vector;
1933         }
1934
1935         return 0;
1936
1937 err_out:
1938         while (q_idx) {
1939                 q_idx--;
1940                 q_vector = adapter->q_vector[q_idx];
1941                 netif_napi_del(&q_vector->napi);
1942                 kfree(q_vector);
1943                 adapter->q_vector[q_idx] = NULL;
1944         }
1945         return -ENOMEM;
1946 }
1947
1948 /**
1949  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
1950  * @adapter: board private structure to initialize
1951  *
1952  * This function frees the memory allocated to the q_vectors.  In addition if
1953  * NAPI is enabled it will delete any references to the NAPI struct prior
1954  * to freeing the q_vector.
1955  **/
1956 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
1957 {
1958         int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1959
1960         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1961                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
1962
1963                 adapter->q_vector[q_idx] = NULL;
1964                 netif_napi_del(&q_vector->napi);
1965                 kfree(q_vector);
1966         }
1967 }
1968
1969 /**
1970  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
1971  * @adapter: board private structure
1972  *
1973  **/
1974 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
1975 {
1976         pci_disable_msix(adapter->pdev);
1977         kfree(adapter->msix_entries);
1978         adapter->msix_entries = NULL;
1979 }
1980
1981 /**
1982  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
1983  * @adapter: board private structure to initialize
1984  *
1985  **/
1986 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
1987 {
1988         int err;
1989
1990         /* Number of supported queues */
1991         ixgbevf_set_num_queues(adapter);
1992
1993         err = ixgbevf_set_interrupt_capability(adapter);
1994         if (err) {
1995                 hw_dbg(&adapter->hw,
1996                        "Unable to setup interrupt capabilities\n");
1997                 goto err_set_interrupt;
1998         }
1999
2000         err = ixgbevf_alloc_q_vectors(adapter);
2001         if (err) {
2002                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2003                        "vectors\n");
2004                 goto err_alloc_q_vectors;
2005         }
2006
2007         err = ixgbevf_alloc_queues(adapter);
2008         if (err) {
2009                 pr_err("Unable to allocate memory for queues\n");
2010                 goto err_alloc_queues;
2011         }
2012
2013         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2014                "Tx Queue count = %u\n",
2015                (adapter->num_rx_queues > 1) ? "Enabled" :
2016                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2017
2018         set_bit(__IXGBEVF_DOWN, &adapter->state);
2019
2020         return 0;
2021 err_alloc_queues:
2022         ixgbevf_free_q_vectors(adapter);
2023 err_alloc_q_vectors:
2024         ixgbevf_reset_interrupt_capability(adapter);
2025 err_set_interrupt:
2026         return err;
2027 }
2028
2029 /**
2030  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2031  * @adapter: board private structure to clear interrupt scheme on
2032  *
2033  * We go through and clear interrupt specific resources and reset the structure
2034  * to pre-load conditions
2035  **/
2036 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2037 {
2038         adapter->num_tx_queues = 0;
2039         adapter->num_rx_queues = 0;
2040
2041         ixgbevf_free_q_vectors(adapter);
2042         ixgbevf_reset_interrupt_capability(adapter);
2043 }
2044
2045 /**
2046  * ixgbevf_sw_init - Initialize general software structures
2047  * (struct ixgbevf_adapter)
2048  * @adapter: board private structure to initialize
2049  *
2050  * ixgbevf_sw_init initializes the Adapter private data structure.
2051  * Fields are initialized based on PCI device information and
2052  * OS network device settings (MTU size).
2053  **/
2054 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2055 {
2056         struct ixgbe_hw *hw = &adapter->hw;
2057         struct pci_dev *pdev = adapter->pdev;
2058         struct net_device *netdev = adapter->netdev;
2059         int err;
2060
2061         /* PCI config space info */
2062
2063         hw->vendor_id = pdev->vendor;
2064         hw->device_id = pdev->device;
2065         hw->revision_id = pdev->revision;
2066         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2067         hw->subsystem_device_id = pdev->subsystem_device;
2068
2069         hw->mbx.ops.init_params(hw);
2070
2071         /* assume legacy case in which PF would only give VF 2 queues */
2072         hw->mac.max_tx_queues = 2;
2073         hw->mac.max_rx_queues = 2;
2074
2075         err = hw->mac.ops.reset_hw(hw);
2076         if (err) {
2077                 dev_info(&pdev->dev,
2078                          "PF still in reset state.  Is the PF interface up?\n");
2079         } else {
2080                 err = hw->mac.ops.init_hw(hw);
2081                 if (err) {
2082                         pr_err("init_shared_code failed: %d\n", err);
2083                         goto out;
2084                 }
2085                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2086                 if (err)
2087                         dev_info(&pdev->dev, "Error reading MAC address\n");
2088                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2089                         dev_info(&pdev->dev,
2090                                  "MAC address not assigned by administrator.\n");
2091                 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2092         }
2093
2094         if (!is_valid_ether_addr(netdev->dev_addr)) {
2095                 dev_info(&pdev->dev, "Assigning random MAC address\n");
2096                 eth_hw_addr_random(netdev);
2097                 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2098         }
2099
2100         /* lock to protect mailbox accesses */
2101         spin_lock_init(&adapter->mbx_lock);
2102
2103         /* Enable dynamic interrupt throttling rates */
2104         adapter->rx_itr_setting = 1;
2105         adapter->tx_itr_setting = 1;
2106
2107         /* set default ring sizes */
2108         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2109         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2110
2111         set_bit(__IXGBEVF_DOWN, &adapter->state);
2112         return 0;
2113
2114 out:
2115         return err;
2116 }
2117
2118 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
2119         {                                                       \
2120                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
2121                 if (current_counter < last_counter)             \
2122                         counter += 0x100000000LL;               \
2123                 last_counter = current_counter;                 \
2124                 counter &= 0xFFFFFFFF00000000LL;                \
2125                 counter |= current_counter;                     \
2126         }
2127
2128 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2129         {                                                                \
2130                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2131                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2132                 u64 current_counter = (current_counter_msb << 32) |      \
2133                         current_counter_lsb;                             \
2134                 if (current_counter < last_counter)                      \
2135                         counter += 0x1000000000LL;                       \
2136                 last_counter = current_counter;                          \
2137                 counter &= 0xFFFFFFF000000000LL;                         \
2138                 counter |= current_counter;                              \
2139         }
2140 /**
2141  * ixgbevf_update_stats - Update the board statistics counters.
2142  * @adapter: board private structure
2143  **/
2144 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2145 {
2146         struct ixgbe_hw *hw = &adapter->hw;
2147         int i;
2148
2149         if (!adapter->link_up)
2150                 return;
2151
2152         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2153                                 adapter->stats.vfgprc);
2154         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2155                                 adapter->stats.vfgptc);
2156         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2157                                 adapter->stats.last_vfgorc,
2158                                 adapter->stats.vfgorc);
2159         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2160                                 adapter->stats.last_vfgotc,
2161                                 adapter->stats.vfgotc);
2162         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2163                                 adapter->stats.vfmprc);
2164
2165         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
2166                 adapter->hw_csum_rx_error +=
2167                         adapter->rx_ring[i].hw_csum_rx_error;
2168                 adapter->hw_csum_rx_good +=
2169                         adapter->rx_ring[i].hw_csum_rx_good;
2170                 adapter->rx_ring[i].hw_csum_rx_error = 0;
2171                 adapter->rx_ring[i].hw_csum_rx_good = 0;
2172         }
2173 }
2174
2175 /**
2176  * ixgbevf_watchdog - Timer Call-back
2177  * @data: pointer to adapter cast into an unsigned long
2178  **/
2179 static void ixgbevf_watchdog(unsigned long data)
2180 {
2181         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2182         struct ixgbe_hw *hw = &adapter->hw;
2183         u32 eics = 0;
2184         int i;
2185
2186         /*
2187          * Do the watchdog outside of interrupt context due to the lovely
2188          * delays that some of the newer hardware requires
2189          */
2190
2191         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2192                 goto watchdog_short_circuit;
2193
2194         /* get one bit for every active tx/rx interrupt vector */
2195         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2196                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2197                 if (qv->rx.ring || qv->tx.ring)
2198                         eics |= 1 << i;
2199         }
2200
2201         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2202
2203 watchdog_short_circuit:
2204         schedule_work(&adapter->watchdog_task);
2205 }
2206
2207 /**
2208  * ixgbevf_tx_timeout - Respond to a Tx Hang
2209  * @netdev: network interface device structure
2210  **/
2211 static void ixgbevf_tx_timeout(struct net_device *netdev)
2212 {
2213         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2214
2215         /* Do the reset outside of interrupt context */
2216         schedule_work(&adapter->reset_task);
2217 }
2218
2219 static void ixgbevf_reset_task(struct work_struct *work)
2220 {
2221         struct ixgbevf_adapter *adapter;
2222         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2223
2224         /* If we're already down or resetting, just bail */
2225         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2226             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2227                 return;
2228
2229         adapter->tx_timeout_count++;
2230
2231         ixgbevf_reinit_locked(adapter);
2232 }
2233
2234 /**
2235  * ixgbevf_watchdog_task - worker thread to bring link up
2236  * @work: pointer to work_struct containing our data
2237  **/
2238 static void ixgbevf_watchdog_task(struct work_struct *work)
2239 {
2240         struct ixgbevf_adapter *adapter = container_of(work,
2241                                                        struct ixgbevf_adapter,
2242                                                        watchdog_task);
2243         struct net_device *netdev = adapter->netdev;
2244         struct ixgbe_hw *hw = &adapter->hw;
2245         u32 link_speed = adapter->link_speed;
2246         bool link_up = adapter->link_up;
2247         s32 need_reset;
2248
2249         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2250
2251         /*
2252          * Always check the link on the watchdog because we have
2253          * no LSC interrupt
2254          */
2255         spin_lock_bh(&adapter->mbx_lock);
2256
2257         need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2258
2259         spin_unlock_bh(&adapter->mbx_lock);
2260
2261         if (need_reset) {
2262                 adapter->link_up = link_up;
2263                 adapter->link_speed = link_speed;
2264                 netif_carrier_off(netdev);
2265                 netif_tx_stop_all_queues(netdev);
2266                 schedule_work(&adapter->reset_task);
2267                 goto pf_has_reset;
2268         }
2269         adapter->link_up = link_up;
2270         adapter->link_speed = link_speed;
2271
2272         if (link_up) {
2273                 if (!netif_carrier_ok(netdev)) {
2274                         char *link_speed_string;
2275                         switch (link_speed) {
2276                         case IXGBE_LINK_SPEED_10GB_FULL:
2277                                 link_speed_string = "10 Gbps";
2278                                 break;
2279                         case IXGBE_LINK_SPEED_1GB_FULL:
2280                                 link_speed_string = "1 Gbps";
2281                                 break;
2282                         case IXGBE_LINK_SPEED_100_FULL:
2283                                 link_speed_string = "100 Mbps";
2284                                 break;
2285                         default:
2286                                 link_speed_string = "unknown speed";
2287                                 break;
2288                         }
2289                         dev_info(&adapter->pdev->dev,
2290                                 "NIC Link is Up, %s\n", link_speed_string);
2291                         netif_carrier_on(netdev);
2292                         netif_tx_wake_all_queues(netdev);
2293                 }
2294         } else {
2295                 adapter->link_up = false;
2296                 adapter->link_speed = 0;
2297                 if (netif_carrier_ok(netdev)) {
2298                         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2299                         netif_carrier_off(netdev);
2300                         netif_tx_stop_all_queues(netdev);
2301                 }
2302         }
2303
2304         ixgbevf_update_stats(adapter);
2305
2306 pf_has_reset:
2307         /* Reset the timer */
2308         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2309                 mod_timer(&adapter->watchdog_timer,
2310                           round_jiffies(jiffies + (2 * HZ)));
2311
2312         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2313 }
2314
2315 /**
2316  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2317  * @adapter: board private structure
2318  * @tx_ring: Tx descriptor ring for a specific queue
2319  *
2320  * Free all transmit software resources
2321  **/
2322 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2323                                struct ixgbevf_ring *tx_ring)
2324 {
2325         struct pci_dev *pdev = adapter->pdev;
2326
2327         ixgbevf_clean_tx_ring(adapter, tx_ring);
2328
2329         vfree(tx_ring->tx_buffer_info);
2330         tx_ring->tx_buffer_info = NULL;
2331
2332         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2333                           tx_ring->dma);
2334
2335         tx_ring->desc = NULL;
2336 }
2337
2338 /**
2339  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2340  * @adapter: board private structure
2341  *
2342  * Free all transmit software resources
2343  **/
2344 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2345 {
2346         int i;
2347
2348         for (i = 0; i < adapter->num_tx_queues; i++)
2349                 if (adapter->tx_ring[i].desc)
2350                         ixgbevf_free_tx_resources(adapter,
2351                                                   &adapter->tx_ring[i]);
2352
2353 }
2354
2355 /**
2356  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2357  * @adapter: board private structure
2358  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2359  *
2360  * Return 0 on success, negative on failure
2361  **/
2362 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2363                                struct ixgbevf_ring *tx_ring)
2364 {
2365         struct pci_dev *pdev = adapter->pdev;
2366         int size;
2367
2368         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2369         tx_ring->tx_buffer_info = vzalloc(size);
2370         if (!tx_ring->tx_buffer_info)
2371                 goto err;
2372
2373         /* round up to nearest 4K */
2374         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2375         tx_ring->size = ALIGN(tx_ring->size, 4096);
2376
2377         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2378                                            &tx_ring->dma, GFP_KERNEL);
2379         if (!tx_ring->desc)
2380                 goto err;
2381
2382         tx_ring->next_to_use = 0;
2383         tx_ring->next_to_clean = 0;
2384         return 0;
2385
2386 err:
2387         vfree(tx_ring->tx_buffer_info);
2388         tx_ring->tx_buffer_info = NULL;
2389         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2390                "descriptor ring\n");
2391         return -ENOMEM;
2392 }
2393
2394 /**
2395  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2396  * @adapter: board private structure
2397  *
2398  * If this function returns with an error, then it's possible one or
2399  * more of the rings is populated (while the rest are not).  It is the
2400  * callers duty to clean those orphaned rings.
2401  *
2402  * Return 0 on success, negative on failure
2403  **/
2404 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2405 {
2406         int i, err = 0;
2407
2408         for (i = 0; i < adapter->num_tx_queues; i++) {
2409                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2410                 if (!err)
2411                         continue;
2412                 hw_dbg(&adapter->hw,
2413                        "Allocation for Tx Queue %u failed\n", i);
2414                 break;
2415         }
2416
2417         return err;
2418 }
2419
2420 /**
2421  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2422  * @adapter: board private structure
2423  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2424  *
2425  * Returns 0 on success, negative on failure
2426  **/
2427 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2428                                struct ixgbevf_ring *rx_ring)
2429 {
2430         struct pci_dev *pdev = adapter->pdev;
2431         int size;
2432
2433         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2434         rx_ring->rx_buffer_info = vzalloc(size);
2435         if (!rx_ring->rx_buffer_info)
2436                 goto alloc_failed;
2437
2438         /* Round up to nearest 4K */
2439         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2440         rx_ring->size = ALIGN(rx_ring->size, 4096);
2441
2442         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2443                                            &rx_ring->dma, GFP_KERNEL);
2444
2445         if (!rx_ring->desc) {
2446                 vfree(rx_ring->rx_buffer_info);
2447                 rx_ring->rx_buffer_info = NULL;
2448                 goto alloc_failed;
2449         }
2450
2451         rx_ring->next_to_clean = 0;
2452         rx_ring->next_to_use = 0;
2453
2454         return 0;
2455 alloc_failed:
2456         return -ENOMEM;
2457 }
2458
2459 /**
2460  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2461  * @adapter: board private structure
2462  *
2463  * If this function returns with an error, then it's possible one or
2464  * more of the rings is populated (while the rest are not).  It is the
2465  * callers duty to clean those orphaned rings.
2466  *
2467  * Return 0 on success, negative on failure
2468  **/
2469 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2470 {
2471         int i, err = 0;
2472
2473         for (i = 0; i < adapter->num_rx_queues; i++) {
2474                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2475                 if (!err)
2476                         continue;
2477                 hw_dbg(&adapter->hw,
2478                        "Allocation for Rx Queue %u failed\n", i);
2479                 break;
2480         }
2481         return err;
2482 }
2483
2484 /**
2485  * ixgbevf_free_rx_resources - Free Rx Resources
2486  * @adapter: board private structure
2487  * @rx_ring: ring to clean the resources from
2488  *
2489  * Free all receive software resources
2490  **/
2491 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2492                                struct ixgbevf_ring *rx_ring)
2493 {
2494         struct pci_dev *pdev = adapter->pdev;
2495
2496         ixgbevf_clean_rx_ring(adapter, rx_ring);
2497
2498         vfree(rx_ring->rx_buffer_info);
2499         rx_ring->rx_buffer_info = NULL;
2500
2501         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2502                           rx_ring->dma);
2503
2504         rx_ring->desc = NULL;
2505 }
2506
2507 /**
2508  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2509  * @adapter: board private structure
2510  *
2511  * Free all receive software resources
2512  **/
2513 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2514 {
2515         int i;
2516
2517         for (i = 0; i < adapter->num_rx_queues; i++)
2518                 if (adapter->rx_ring[i].desc)
2519                         ixgbevf_free_rx_resources(adapter,
2520                                                   &adapter->rx_ring[i]);
2521 }
2522
2523 static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter)
2524 {
2525         struct ixgbe_hw *hw = &adapter->hw;
2526         struct ixgbevf_ring *rx_ring;
2527         unsigned int def_q = 0;
2528         unsigned int num_tcs = 0;
2529         unsigned int num_rx_queues = 1;
2530         int err, i;
2531
2532         spin_lock_bh(&adapter->mbx_lock);
2533
2534         /* fetch queue configuration from the PF */
2535         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2536
2537         spin_unlock_bh(&adapter->mbx_lock);
2538
2539         if (err)
2540                 return err;
2541
2542         if (num_tcs > 1) {
2543                 /* update default Tx ring register index */
2544                 adapter->tx_ring[0].reg_idx = def_q;
2545
2546                 /* we need as many queues as traffic classes */
2547                 num_rx_queues = num_tcs;
2548         }
2549
2550         /* nothing to do if we have the correct number of queues */
2551         if (adapter->num_rx_queues == num_rx_queues)
2552                 return 0;
2553
2554         /* allocate new rings */
2555         rx_ring = kcalloc(num_rx_queues,
2556                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
2557         if (!rx_ring)
2558                 return -ENOMEM;
2559
2560         /* setup ring fields */
2561         for (i = 0; i < num_rx_queues; i++) {
2562                 rx_ring[i].count = adapter->rx_ring_count;
2563                 rx_ring[i].queue_index = i;
2564                 rx_ring[i].reg_idx = i;
2565                 rx_ring[i].dev = &adapter->pdev->dev;
2566                 rx_ring[i].netdev = adapter->netdev;
2567         }
2568
2569         /* free the existing ring and queues */
2570         adapter->num_rx_queues = 0;
2571         kfree(adapter->rx_ring);
2572
2573         /* move new rings into position on the adapter struct */
2574         adapter->rx_ring = rx_ring;
2575         adapter->num_rx_queues = num_rx_queues;
2576
2577         return 0;
2578 }
2579
2580 /**
2581  * ixgbevf_open - Called when a network interface is made active
2582  * @netdev: network interface device structure
2583  *
2584  * Returns 0 on success, negative value on failure
2585  *
2586  * The open entry point is called when a network interface is made
2587  * active by the system (IFF_UP).  At this point all resources needed
2588  * for transmit and receive operations are allocated, the interrupt
2589  * handler is registered with the OS, the watchdog timer is started,
2590  * and the stack is notified that the interface is ready.
2591  **/
2592 static int ixgbevf_open(struct net_device *netdev)
2593 {
2594         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2595         struct ixgbe_hw *hw = &adapter->hw;
2596         int err;
2597
2598         /* A previous failure to open the device because of a lack of
2599          * available MSIX vector resources may have reset the number
2600          * of msix vectors variable to zero.  The only way to recover
2601          * is to unload/reload the driver and hope that the system has
2602          * been able to recover some MSIX vector resources.
2603          */
2604         if (!adapter->num_msix_vectors)
2605                 return -ENOMEM;
2606
2607         /* disallow open during test */
2608         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2609                 return -EBUSY;
2610
2611         if (hw->adapter_stopped) {
2612                 ixgbevf_reset(adapter);
2613                 /* if adapter is still stopped then PF isn't up and
2614                  * the vf can't start. */
2615                 if (hw->adapter_stopped) {
2616                         err = IXGBE_ERR_MBX;
2617                         pr_err("Unable to start - perhaps the PF Driver isn't "
2618                                "up yet\n");
2619                         goto err_setup_reset;
2620                 }
2621         }
2622
2623         ixgbevf_negotiate_api(adapter);
2624
2625         /* setup queue reg_idx and Rx queue count */
2626         err = ixgbevf_setup_queues(adapter);
2627         if (err)
2628                 goto err_setup_queues;
2629
2630         /* allocate transmit descriptors */
2631         err = ixgbevf_setup_all_tx_resources(adapter);
2632         if (err)
2633                 goto err_setup_tx;
2634
2635         /* allocate receive descriptors */
2636         err = ixgbevf_setup_all_rx_resources(adapter);
2637         if (err)
2638                 goto err_setup_rx;
2639
2640         ixgbevf_configure(adapter);
2641
2642         /*
2643          * Map the Tx/Rx rings to the vectors we were allotted.
2644          * if request_irq will be called in this function map_rings
2645          * must be called *before* up_complete
2646          */
2647         ixgbevf_map_rings_to_vectors(adapter);
2648
2649         ixgbevf_up_complete(adapter);
2650
2651         /* clear any pending interrupts, may auto mask */
2652         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2653         err = ixgbevf_request_irq(adapter);
2654         if (err)
2655                 goto err_req_irq;
2656
2657         ixgbevf_irq_enable(adapter);
2658
2659         return 0;
2660
2661 err_req_irq:
2662         ixgbevf_down(adapter);
2663 err_setup_rx:
2664         ixgbevf_free_all_rx_resources(adapter);
2665 err_setup_tx:
2666         ixgbevf_free_all_tx_resources(adapter);
2667 err_setup_queues:
2668         ixgbevf_reset(adapter);
2669
2670 err_setup_reset:
2671
2672         return err;
2673 }
2674
2675 /**
2676  * ixgbevf_close - Disables a network interface
2677  * @netdev: network interface device structure
2678  *
2679  * Returns 0, this is not allowed to fail
2680  *
2681  * The close entry point is called when an interface is de-activated
2682  * by the OS.  The hardware is still under the drivers control, but
2683  * needs to be disabled.  A global MAC reset is issued to stop the
2684  * hardware, and all transmit and receive resources are freed.
2685  **/
2686 static int ixgbevf_close(struct net_device *netdev)
2687 {
2688         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2689
2690         ixgbevf_down(adapter);
2691         ixgbevf_free_irq(adapter);
2692
2693         ixgbevf_free_all_tx_resources(adapter);
2694         ixgbevf_free_all_rx_resources(adapter);
2695
2696         return 0;
2697 }
2698
2699 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2700                                 u32 vlan_macip_lens, u32 type_tucmd,
2701                                 u32 mss_l4len_idx)
2702 {
2703         struct ixgbe_adv_tx_context_desc *context_desc;
2704         u16 i = tx_ring->next_to_use;
2705
2706         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2707
2708         i++;
2709         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2710
2711         /* set bits to identify this as an advanced context descriptor */
2712         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2713
2714         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
2715         context_desc->seqnum_seed       = 0;
2716         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
2717         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2718 }
2719
2720 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2721                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2722 {
2723         u32 vlan_macip_lens, type_tucmd;
2724         u32 mss_l4len_idx, l4len;
2725
2726         if (!skb_is_gso(skb))
2727                 return 0;
2728
2729         if (skb_header_cloned(skb)) {
2730                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2731                 if (err)
2732                         return err;
2733         }
2734
2735         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2736         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2737
2738         if (skb->protocol == htons(ETH_P_IP)) {
2739                 struct iphdr *iph = ip_hdr(skb);
2740                 iph->tot_len = 0;
2741                 iph->check = 0;
2742                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2743                                                          iph->daddr, 0,
2744                                                          IPPROTO_TCP,
2745                                                          0);
2746                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2747         } else if (skb_is_gso_v6(skb)) {
2748                 ipv6_hdr(skb)->payload_len = 0;
2749                 tcp_hdr(skb)->check =
2750                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2751                                      &ipv6_hdr(skb)->daddr,
2752                                      0, IPPROTO_TCP, 0);
2753         }
2754
2755         /* compute header lengths */
2756         l4len = tcp_hdrlen(skb);
2757         *hdr_len += l4len;
2758         *hdr_len = skb_transport_offset(skb) + l4len;
2759
2760         /* mss_l4len_id: use 1 as index for TSO */
2761         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2762         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2763         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2764
2765         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2766         vlan_macip_lens = skb_network_header_len(skb);
2767         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2768         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2769
2770         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2771                             type_tucmd, mss_l4len_idx);
2772
2773         return 1;
2774 }
2775
2776 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2777                             struct sk_buff *skb, u32 tx_flags)
2778 {
2779         u32 vlan_macip_lens = 0;
2780         u32 mss_l4len_idx = 0;
2781         u32 type_tucmd = 0;
2782
2783         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2784                 u8 l4_hdr = 0;
2785                 switch (skb->protocol) {
2786                 case __constant_htons(ETH_P_IP):
2787                         vlan_macip_lens |= skb_network_header_len(skb);
2788                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2789                         l4_hdr = ip_hdr(skb)->protocol;
2790                         break;
2791                 case __constant_htons(ETH_P_IPV6):
2792                         vlan_macip_lens |= skb_network_header_len(skb);
2793                         l4_hdr = ipv6_hdr(skb)->nexthdr;
2794                         break;
2795                 default:
2796                         if (unlikely(net_ratelimit())) {
2797                                 dev_warn(tx_ring->dev,
2798                                  "partial checksum but proto=%x!\n",
2799                                  skb->protocol);
2800                         }
2801                         break;
2802                 }
2803
2804                 switch (l4_hdr) {
2805                 case IPPROTO_TCP:
2806                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2807                         mss_l4len_idx = tcp_hdrlen(skb) <<
2808                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2809                         break;
2810                 case IPPROTO_SCTP:
2811                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2812                         mss_l4len_idx = sizeof(struct sctphdr) <<
2813                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2814                         break;
2815                 case IPPROTO_UDP:
2816                         mss_l4len_idx = sizeof(struct udphdr) <<
2817                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2818                         break;
2819                 default:
2820                         if (unlikely(net_ratelimit())) {
2821                                 dev_warn(tx_ring->dev,
2822                                  "partial checksum but l4 proto=%x!\n",
2823                                  l4_hdr);
2824                         }
2825                         break;
2826                 }
2827         }
2828
2829         /* vlan_macip_lens: MACLEN, VLAN tag */
2830         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2831         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2832
2833         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2834                             type_tucmd, mss_l4len_idx);
2835
2836         return (skb->ip_summed == CHECKSUM_PARTIAL);
2837 }
2838
2839 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2840                           struct sk_buff *skb, u32 tx_flags)
2841 {
2842         struct ixgbevf_tx_buffer *tx_buffer_info;
2843         unsigned int len;
2844         unsigned int total = skb->len;
2845         unsigned int offset = 0, size;
2846         int count = 0;
2847         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2848         unsigned int f;
2849         int i;
2850
2851         i = tx_ring->next_to_use;
2852
2853         len = min(skb_headlen(skb), total);
2854         while (len) {
2855                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2856                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2857
2858                 tx_buffer_info->length = size;
2859                 tx_buffer_info->mapped_as_page = false;
2860                 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2861                                                      skb->data + offset,
2862                                                      size, DMA_TO_DEVICE);
2863                 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2864                         goto dma_error;
2865
2866                 len -= size;
2867                 total -= size;
2868                 offset += size;
2869                 count++;
2870                 i++;
2871                 if (i == tx_ring->count)
2872                         i = 0;
2873         }
2874
2875         for (f = 0; f < nr_frags; f++) {
2876                 const struct skb_frag_struct *frag;
2877
2878                 frag = &skb_shinfo(skb)->frags[f];
2879                 len = min((unsigned int)skb_frag_size(frag), total);
2880                 offset = 0;
2881
2882                 while (len) {
2883                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2884                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2885
2886                         tx_buffer_info->length = size;
2887                         tx_buffer_info->dma =
2888                                 skb_frag_dma_map(tx_ring->dev, frag,
2889                                                  offset, size, DMA_TO_DEVICE);
2890                         if (dma_mapping_error(tx_ring->dev,
2891                                               tx_buffer_info->dma))
2892                                 goto dma_error;
2893                         tx_buffer_info->mapped_as_page = true;
2894
2895                         len -= size;
2896                         total -= size;
2897                         offset += size;
2898                         count++;
2899                         i++;
2900                         if (i == tx_ring->count)
2901                                 i = 0;
2902                 }
2903                 if (total == 0)
2904                         break;
2905         }
2906
2907         if (i == 0)
2908                 i = tx_ring->count - 1;
2909         else
2910                 i = i - 1;
2911         tx_ring->tx_buffer_info[i].skb = skb;
2912
2913         return count;
2914
2915 dma_error:
2916         dev_err(tx_ring->dev, "TX DMA map failed\n");
2917
2918         /* clear timestamp and dma mappings for failed tx_buffer_info map */
2919         tx_buffer_info->dma = 0;
2920         count--;
2921
2922         /* clear timestamp and dma mappings for remaining portion of packet */
2923         while (count >= 0) {
2924                 count--;
2925                 i--;
2926                 if (i < 0)
2927                         i += tx_ring->count;
2928                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2929                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2930         }
2931
2932         return count;
2933 }
2934
2935 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
2936                              int count, unsigned int first, u32 paylen,
2937                              u8 hdr_len)
2938 {
2939         union ixgbe_adv_tx_desc *tx_desc = NULL;
2940         struct ixgbevf_tx_buffer *tx_buffer_info;
2941         u32 olinfo_status = 0, cmd_type_len = 0;
2942         unsigned int i;
2943
2944         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2945
2946         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2947
2948         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2949
2950         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2951                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2952
2953         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2954                 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
2955
2956         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2957                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2958
2959                 /* use index 1 context for tso */
2960                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2961                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2962                         olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
2963         }
2964
2965         /*
2966          * Check Context must be set if Tx switch is enabled, which it
2967          * always is for case where virtual functions are running
2968          */
2969         olinfo_status |= IXGBE_ADVTXD_CC;
2970
2971         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2972
2973         i = tx_ring->next_to_use;
2974         while (count--) {
2975                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2976                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2977                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2978                 tx_desc->read.cmd_type_len =
2979                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2980                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2981                 i++;
2982                 if (i == tx_ring->count)
2983                         i = 0;
2984         }
2985
2986         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2987
2988         tx_ring->tx_buffer_info[first].time_stamp = jiffies;
2989
2990         /* Force memory writes to complete before letting h/w
2991          * know there are new descriptors to fetch.  (Only
2992          * applicable for weak-ordered memory model archs,
2993          * such as IA-64).
2994          */
2995         wmb();
2996
2997         tx_ring->tx_buffer_info[first].next_to_watch = tx_desc;
2998         tx_ring->next_to_use = i;
2999 }
3000
3001 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3002 {
3003         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3004
3005         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3006         /* Herbert's original patch had:
3007          *  smp_mb__after_netif_stop_queue();
3008          * but since that doesn't exist yet, just open code it. */
3009         smp_mb();
3010
3011         /* We need to check again in a case another CPU has just
3012          * made room available. */
3013         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3014                 return -EBUSY;
3015
3016         /* A reprieve! - use start_queue because it doesn't call schedule */
3017         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3018         ++adapter->restart_queue;
3019         return 0;
3020 }
3021
3022 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3023 {
3024         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3025                 return 0;
3026         return __ixgbevf_maybe_stop_tx(tx_ring, size);
3027 }
3028
3029 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3030 {
3031         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3032         struct ixgbevf_ring *tx_ring;
3033         unsigned int first;
3034         unsigned int tx_flags = 0;
3035         u8 hdr_len = 0;
3036         int r_idx = 0, tso;
3037         u16 count = TXD_USE_COUNT(skb_headlen(skb));
3038 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3039         unsigned short f;
3040 #endif
3041         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3042         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3043                 dev_kfree_skb(skb);
3044                 return NETDEV_TX_OK;
3045         }
3046
3047         tx_ring = &adapter->tx_ring[r_idx];
3048
3049         /*
3050          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3051          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3052          *       + 2 desc gap to keep tail from touching head,
3053          *       + 1 desc for context descriptor,
3054          * otherwise try next time
3055          */
3056 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3057         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3058                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3059 #else
3060         count += skb_shinfo(skb)->nr_frags;
3061 #endif
3062         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3063                 adapter->tx_busy++;
3064                 return NETDEV_TX_BUSY;
3065         }
3066
3067         if (vlan_tx_tag_present(skb)) {
3068                 tx_flags |= vlan_tx_tag_get(skb);
3069                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3070                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3071         }
3072
3073         first = tx_ring->next_to_use;
3074
3075         if (skb->protocol == htons(ETH_P_IP))
3076                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3077         tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
3078         if (tso < 0) {
3079                 dev_kfree_skb_any(skb);
3080                 return NETDEV_TX_OK;
3081         }
3082
3083         if (tso)
3084                 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
3085         else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
3086                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3087
3088         ixgbevf_tx_queue(tx_ring, tx_flags,
3089                          ixgbevf_tx_map(tx_ring, skb, tx_flags),
3090                          first, skb->len, hdr_len);
3091
3092         writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
3093
3094         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3095
3096         return NETDEV_TX_OK;
3097 }
3098
3099 /**
3100  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3101  * @netdev: network interface device structure
3102  * @p: pointer to an address structure
3103  *
3104  * Returns 0 on success, negative on failure
3105  **/
3106 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3107 {
3108         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3109         struct ixgbe_hw *hw = &adapter->hw;
3110         struct sockaddr *addr = p;
3111
3112         if (!is_valid_ether_addr(addr->sa_data))
3113                 return -EADDRNOTAVAIL;
3114
3115         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3116         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3117
3118         spin_lock_bh(&adapter->mbx_lock);
3119
3120         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3121
3122         spin_unlock_bh(&adapter->mbx_lock);
3123
3124         return 0;
3125 }
3126
3127 /**
3128  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3129  * @netdev: network interface device structure
3130  * @new_mtu: new value for maximum frame size
3131  *
3132  * Returns 0 on success, negative on failure
3133  **/
3134 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3135 {
3136         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3137         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3138         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3139
3140         switch (adapter->hw.api_version) {
3141         case ixgbe_mbox_api_11:
3142                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3143                 break;
3144         default:
3145                 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3146                         max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3147                 break;
3148         }
3149
3150         /* MTU < 68 is an error and causes problems on some kernels */
3151         if ((new_mtu < 68) || (max_frame > max_possible_frame))
3152                 return -EINVAL;
3153
3154         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3155                netdev->mtu, new_mtu);
3156         /* must set new MTU before calling down or up */
3157         netdev->mtu = new_mtu;
3158
3159         if (netif_running(netdev))
3160                 ixgbevf_reinit_locked(adapter);
3161
3162         return 0;
3163 }
3164
3165 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3166 {
3167         struct net_device *netdev = pci_get_drvdata(pdev);
3168         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3169 #ifdef CONFIG_PM
3170         int retval = 0;
3171 #endif
3172
3173         netif_device_detach(netdev);
3174
3175         if (netif_running(netdev)) {
3176                 rtnl_lock();
3177                 ixgbevf_down(adapter);
3178                 ixgbevf_free_irq(adapter);
3179                 ixgbevf_free_all_tx_resources(adapter);
3180                 ixgbevf_free_all_rx_resources(adapter);
3181                 rtnl_unlock();
3182         }
3183
3184         ixgbevf_clear_interrupt_scheme(adapter);
3185
3186 #ifdef CONFIG_PM
3187         retval = pci_save_state(pdev);
3188         if (retval)
3189                 return retval;
3190
3191 #endif
3192         pci_disable_device(pdev);
3193
3194         return 0;
3195 }
3196
3197 #ifdef CONFIG_PM
3198 static int ixgbevf_resume(struct pci_dev *pdev)
3199 {
3200         struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
3201         struct net_device *netdev = adapter->netdev;
3202         u32 err;
3203
3204         pci_set_power_state(pdev, PCI_D0);
3205         pci_restore_state(pdev);
3206         /*
3207          * pci_restore_state clears dev->state_saved so call
3208          * pci_save_state to restore it.
3209          */
3210         pci_save_state(pdev);
3211
3212         err = pci_enable_device_mem(pdev);
3213         if (err) {
3214                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3215                 return err;
3216         }
3217         pci_set_master(pdev);
3218
3219         rtnl_lock();
3220         err = ixgbevf_init_interrupt_scheme(adapter);
3221         rtnl_unlock();
3222         if (err) {
3223                 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3224                 return err;
3225         }
3226
3227         ixgbevf_reset(adapter);
3228
3229         if (netif_running(netdev)) {
3230                 err = ixgbevf_open(netdev);
3231                 if (err)
3232                         return err;
3233         }
3234
3235         netif_device_attach(netdev);
3236
3237         return err;
3238 }
3239
3240 #endif /* CONFIG_PM */
3241 static void ixgbevf_shutdown(struct pci_dev *pdev)
3242 {
3243         ixgbevf_suspend(pdev, PMSG_SUSPEND);
3244 }
3245
3246 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3247                                                 struct rtnl_link_stats64 *stats)
3248 {
3249         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3250         unsigned int start;
3251         u64 bytes, packets;
3252         const struct ixgbevf_ring *ring;
3253         int i;
3254
3255         ixgbevf_update_stats(adapter);
3256
3257         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3258
3259         for (i = 0; i < adapter->num_rx_queues; i++) {
3260                 ring = &adapter->rx_ring[i];
3261                 do {
3262                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3263                         bytes = ring->total_bytes;
3264                         packets = ring->total_packets;
3265                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3266                 stats->rx_bytes += bytes;
3267                 stats->rx_packets += packets;
3268         }
3269
3270         for (i = 0; i < adapter->num_tx_queues; i++) {
3271                 ring = &adapter->tx_ring[i];
3272                 do {
3273                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3274                         bytes = ring->total_bytes;
3275                         packets = ring->total_packets;
3276                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3277                 stats->tx_bytes += bytes;
3278                 stats->tx_packets += packets;
3279         }
3280
3281         return stats;
3282 }
3283
3284 static const struct net_device_ops ixgbevf_netdev_ops = {
3285         .ndo_open               = ixgbevf_open,
3286         .ndo_stop               = ixgbevf_close,
3287         .ndo_start_xmit         = ixgbevf_xmit_frame,
3288         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3289         .ndo_get_stats64        = ixgbevf_get_stats,
3290         .ndo_validate_addr      = eth_validate_addr,
3291         .ndo_set_mac_address    = ixgbevf_set_mac,
3292         .ndo_change_mtu         = ixgbevf_change_mtu,
3293         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3294         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3295         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3296 };
3297
3298 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3299 {
3300         dev->netdev_ops = &ixgbevf_netdev_ops;
3301         ixgbevf_set_ethtool_ops(dev);
3302         dev->watchdog_timeo = 5 * HZ;
3303 }
3304
3305 /**
3306  * ixgbevf_probe - Device Initialization Routine
3307  * @pdev: PCI device information struct
3308  * @ent: entry in ixgbevf_pci_tbl
3309  *
3310  * Returns 0 on success, negative on failure
3311  *
3312  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3313  * The OS initialization, configuring of the adapter private structure,
3314  * and a hardware reset occur.
3315  **/
3316 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3317 {
3318         struct net_device *netdev;
3319         struct ixgbevf_adapter *adapter = NULL;
3320         struct ixgbe_hw *hw = NULL;
3321         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3322         static int cards_found;
3323         int err, pci_using_dac;
3324
3325         err = pci_enable_device(pdev);
3326         if (err)
3327                 return err;
3328
3329         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3330             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3331                 pci_using_dac = 1;
3332         } else {
3333                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3334                 if (err) {
3335                         err = dma_set_coherent_mask(&pdev->dev,
3336                                                     DMA_BIT_MASK(32));
3337                         if (err) {
3338                                 dev_err(&pdev->dev, "No usable DMA "
3339                                         "configuration, aborting\n");
3340                                 goto err_dma;
3341                         }
3342                 }
3343                 pci_using_dac = 0;
3344         }
3345
3346         err = pci_request_regions(pdev, ixgbevf_driver_name);
3347         if (err) {
3348                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3349                 goto err_pci_reg;
3350         }
3351
3352         pci_set_master(pdev);
3353
3354         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3355                                    MAX_TX_QUEUES);
3356         if (!netdev) {
3357                 err = -ENOMEM;
3358                 goto err_alloc_etherdev;
3359         }
3360
3361         SET_NETDEV_DEV(netdev, &pdev->dev);
3362
3363         pci_set_drvdata(pdev, netdev);
3364         adapter = netdev_priv(netdev);
3365
3366         adapter->netdev = netdev;
3367         adapter->pdev = pdev;
3368         hw = &adapter->hw;
3369         hw->back = adapter;
3370         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3371
3372         /*
3373          * call save state here in standalone driver because it relies on
3374          * adapter struct to exist, and needs to call netdev_priv
3375          */
3376         pci_save_state(pdev);
3377
3378         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3379                               pci_resource_len(pdev, 0));
3380         if (!hw->hw_addr) {
3381                 err = -EIO;
3382                 goto err_ioremap;
3383         }
3384
3385         ixgbevf_assign_netdev_ops(netdev);
3386
3387         adapter->bd_number = cards_found;
3388
3389         /* Setup hw api */
3390         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3391         hw->mac.type  = ii->mac;
3392
3393         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3394                sizeof(struct ixgbe_mbx_operations));
3395
3396         /* setup the private structure */
3397         err = ixgbevf_sw_init(adapter);
3398         if (err)
3399                 goto err_sw_init;
3400
3401         /* The HW MAC address was set and/or determined in sw_init */
3402         if (!is_valid_ether_addr(netdev->dev_addr)) {
3403                 pr_err("invalid MAC address\n");
3404                 err = -EIO;
3405                 goto err_sw_init;
3406         }
3407
3408         netdev->hw_features = NETIF_F_SG |
3409                            NETIF_F_IP_CSUM |
3410                            NETIF_F_IPV6_CSUM |
3411                            NETIF_F_TSO |
3412                            NETIF_F_TSO6 |
3413                            NETIF_F_RXCSUM;
3414
3415         netdev->features = netdev->hw_features |
3416                            NETIF_F_HW_VLAN_CTAG_TX |
3417                            NETIF_F_HW_VLAN_CTAG_RX |
3418                            NETIF_F_HW_VLAN_CTAG_FILTER;
3419
3420         netdev->vlan_features |= NETIF_F_TSO;
3421         netdev->vlan_features |= NETIF_F_TSO6;
3422         netdev->vlan_features |= NETIF_F_IP_CSUM;
3423         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3424         netdev->vlan_features |= NETIF_F_SG;
3425
3426         if (pci_using_dac)
3427                 netdev->features |= NETIF_F_HIGHDMA;
3428
3429         netdev->priv_flags |= IFF_UNICAST_FLT;
3430
3431         init_timer(&adapter->watchdog_timer);
3432         adapter->watchdog_timer.function = ixgbevf_watchdog;
3433         adapter->watchdog_timer.data = (unsigned long)adapter;
3434
3435         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3436         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3437
3438         err = ixgbevf_init_interrupt_scheme(adapter);
3439         if (err)
3440                 goto err_sw_init;
3441
3442         strcpy(netdev->name, "eth%d");
3443
3444         err = register_netdev(netdev);
3445         if (err)
3446                 goto err_register;
3447
3448         netif_carrier_off(netdev);
3449
3450         ixgbevf_init_last_counter_stats(adapter);
3451
3452         /* print the MAC address */
3453         hw_dbg(hw, "%pM\n", netdev->dev_addr);
3454
3455         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3456
3457         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3458         cards_found++;
3459         return 0;
3460
3461 err_register:
3462         ixgbevf_clear_interrupt_scheme(adapter);
3463 err_sw_init:
3464         ixgbevf_reset_interrupt_capability(adapter);
3465         iounmap(hw->hw_addr);
3466 err_ioremap:
3467         free_netdev(netdev);
3468 err_alloc_etherdev:
3469         pci_release_regions(pdev);
3470 err_pci_reg:
3471 err_dma:
3472         pci_disable_device(pdev);
3473         return err;
3474 }
3475
3476 /**
3477  * ixgbevf_remove - Device Removal Routine
3478  * @pdev: PCI device information struct
3479  *
3480  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3481  * that it should release a PCI device.  The could be caused by a
3482  * Hot-Plug event, or because the driver is going to be removed from
3483  * memory.
3484  **/
3485 static void ixgbevf_remove(struct pci_dev *pdev)
3486 {
3487         struct net_device *netdev = pci_get_drvdata(pdev);
3488         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3489
3490         set_bit(__IXGBEVF_DOWN, &adapter->state);
3491
3492         del_timer_sync(&adapter->watchdog_timer);
3493
3494         cancel_work_sync(&adapter->reset_task);
3495         cancel_work_sync(&adapter->watchdog_task);
3496
3497         if (netdev->reg_state == NETREG_REGISTERED)
3498                 unregister_netdev(netdev);
3499
3500         ixgbevf_clear_interrupt_scheme(adapter);
3501         ixgbevf_reset_interrupt_capability(adapter);
3502
3503         iounmap(adapter->hw.hw_addr);
3504         pci_release_regions(pdev);
3505
3506         hw_dbg(&adapter->hw, "Remove complete\n");
3507
3508         kfree(adapter->tx_ring);
3509         kfree(adapter->rx_ring);
3510
3511         free_netdev(netdev);
3512
3513         pci_disable_device(pdev);
3514 }
3515
3516 /**
3517  * ixgbevf_io_error_detected - called when PCI error is detected
3518  * @pdev: Pointer to PCI device
3519  * @state: The current pci connection state
3520  *
3521  * This function is called after a PCI bus error affecting
3522  * this device has been detected.
3523  */
3524 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3525                                                   pci_channel_state_t state)
3526 {
3527         struct net_device *netdev = pci_get_drvdata(pdev);
3528         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3529
3530         netif_device_detach(netdev);
3531
3532         if (state == pci_channel_io_perm_failure)
3533                 return PCI_ERS_RESULT_DISCONNECT;
3534
3535         if (netif_running(netdev))
3536                 ixgbevf_down(adapter);
3537
3538         pci_disable_device(pdev);
3539
3540         /* Request a slot slot reset. */
3541         return PCI_ERS_RESULT_NEED_RESET;
3542 }
3543
3544 /**
3545  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3546  * @pdev: Pointer to PCI device
3547  *
3548  * Restart the card from scratch, as if from a cold-boot. Implementation
3549  * resembles the first-half of the ixgbevf_resume routine.
3550  */
3551 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3552 {
3553         struct net_device *netdev = pci_get_drvdata(pdev);
3554         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3555
3556         if (pci_enable_device_mem(pdev)) {
3557                 dev_err(&pdev->dev,
3558                         "Cannot re-enable PCI device after reset.\n");
3559                 return PCI_ERS_RESULT_DISCONNECT;
3560         }
3561
3562         pci_set_master(pdev);
3563
3564         ixgbevf_reset(adapter);
3565
3566         return PCI_ERS_RESULT_RECOVERED;
3567 }
3568
3569 /**
3570  * ixgbevf_io_resume - called when traffic can start flowing again.
3571  * @pdev: Pointer to PCI device
3572  *
3573  * This callback is called when the error recovery driver tells us that
3574  * its OK to resume normal operation. Implementation resembles the
3575  * second-half of the ixgbevf_resume routine.
3576  */
3577 static void ixgbevf_io_resume(struct pci_dev *pdev)
3578 {
3579         struct net_device *netdev = pci_get_drvdata(pdev);
3580         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3581
3582         if (netif_running(netdev))
3583                 ixgbevf_up(adapter);
3584
3585         netif_device_attach(netdev);
3586 }
3587
3588 /* PCI Error Recovery (ERS) */
3589 static const struct pci_error_handlers ixgbevf_err_handler = {
3590         .error_detected = ixgbevf_io_error_detected,
3591         .slot_reset = ixgbevf_io_slot_reset,
3592         .resume = ixgbevf_io_resume,
3593 };
3594
3595 static struct pci_driver ixgbevf_driver = {
3596         .name     = ixgbevf_driver_name,
3597         .id_table = ixgbevf_pci_tbl,
3598         .probe    = ixgbevf_probe,
3599         .remove   = ixgbevf_remove,
3600 #ifdef CONFIG_PM
3601         /* Power Management Hooks */
3602         .suspend  = ixgbevf_suspend,
3603         .resume   = ixgbevf_resume,
3604 #endif
3605         .shutdown = ixgbevf_shutdown,
3606         .err_handler = &ixgbevf_err_handler
3607 };
3608
3609 /**
3610  * ixgbevf_init_module - Driver Registration Routine
3611  *
3612  * ixgbevf_init_module is the first routine called when the driver is
3613  * loaded. All it does is register with the PCI subsystem.
3614  **/
3615 static int __init ixgbevf_init_module(void)
3616 {
3617         int ret;
3618         pr_info("%s - version %s\n", ixgbevf_driver_string,
3619                 ixgbevf_driver_version);
3620
3621         pr_info("%s\n", ixgbevf_copyright);
3622
3623         ret = pci_register_driver(&ixgbevf_driver);
3624         return ret;
3625 }
3626
3627 module_init(ixgbevf_init_module);
3628
3629 /**
3630  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3631  *
3632  * ixgbevf_exit_module is called just before the driver is removed
3633  * from memory.
3634  **/
3635 static void __exit ixgbevf_exit_module(void)
3636 {
3637         pci_unregister_driver(&ixgbevf_driver);
3638 }
3639
3640 #ifdef DEBUG
3641 /**
3642  * ixgbevf_get_hw_dev_name - return device name string
3643  * used by hardware layer to print debugging information
3644  **/
3645 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3646 {
3647         struct ixgbevf_adapter *adapter = hw->back;
3648         return adapter->netdev->name;
3649 }
3650
3651 #endif
3652 module_exit(ixgbevf_exit_module);
3653
3654 /* ixgbevf_main.c */