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