Pileus Git - ~andy/linux/blob - drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

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