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 "2.11.3-k"
  62 const char ixgbevf_driver_version[] = DRV_VERSION;
  63 static char ixgbevf_copyright[] =
  64         "Copyright (c) 2009 - 2012 Intel Corporation.";
  65
  66 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  67         [board_82599_vf] = &ixgbevf_82599_vf_info,
  68         [board_X540_vf]  = &ixgbevf_X540_vf_info,
  69 };
  70
  71 /* ixgbevf_pci_tbl - PCI Device ID Table
  72  *
  73  * Wildcard entries (PCI_ANY_ID) should come last
  74  * Last entry must be all 0s
  75  *
  76  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  77  *   Class, Class Mask, private data (not used) }
  78  */
  79 static DEFINE_PCI_DEVICE_TABLE(ixgbevf_pci_tbl) = {
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  81         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  82         /* required last entry */
  83         {0, }
  84 };
  85 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  86
  87 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  88 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
  89 MODULE_LICENSE("GPL");
  90 MODULE_VERSION(DRV_VERSION);
  91
  92 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  93 static int debug = -1;
  94 module_param(debug, int, 0);
  95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  96
  97 /* forward decls */
  98 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
  99 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 100
 101 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
 102                                            struct ixgbevf_ring *rx_ring,
 103                                            u32 val)
 104 {
 105         /*
 106          * Force memory writes to complete before letting h/w
 107          * know there are new descriptors to fetch.  (Only
 108          * applicable for weak-ordered memory model archs,
 109          * such as IA-64).
 110          */
 111         wmb();
 112         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 113 }
 114
 115 /**
 116  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 117  * @adapter: pointer to adapter struct
 118  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 119  * @queue: queue to map the corresponding interrupt to
 120  * @msix_vector: the vector to map to the corresponding queue
 121  */
 122 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 123                              u8 queue, u8 msix_vector)
 124 {
 125         u32 ivar, index;
 126         struct ixgbe_hw *hw = &adapter->hw;
 127         if (direction == -1) {
 128                 /* other causes */
 129                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 130                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 131                 ivar &= ~0xFF;
 132                 ivar |= msix_vector;
 133                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 134         } else {
 135                 /* tx or rx causes */
 136                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 137                 index = ((16 * (queue & 1)) + (8 * direction));
 138                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 139                 ivar &= ~(0xFF << index);
 140                 ivar |= (msix_vector << index);
 141                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 142         }
 143 }
 144
 145 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
 146                                                struct ixgbevf_tx_buffer
 147                                                *tx_buffer_info)
 148 {
 149         if (tx_buffer_info->dma) {
 150                 if (tx_buffer_info->mapped_as_page)
 151                         dma_unmap_page(tx_ring->dev,
 152                                        tx_buffer_info->dma,
 153                                        tx_buffer_info->length,
 154                                        DMA_TO_DEVICE);
 155                 else
 156                         dma_unmap_single(tx_ring->dev,
 157                                          tx_buffer_info->dma,
 158                                          tx_buffer_info->length,
 159                                          DMA_TO_DEVICE);
 160                 tx_buffer_info->dma = 0;
 161         }
 162         if (tx_buffer_info->skb) {
 163                 dev_kfree_skb_any(tx_buffer_info->skb);
 164                 tx_buffer_info->skb = NULL;
 165         }
 166         tx_buffer_info->time_stamp = 0;
 167         /* tx_buffer_info must be completely set up in the transmit path */
 168 }
 169
 170 #define IXGBE_MAX_TXD_PWR       14
 171 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 172
 173 /* Tx Descriptors needed, worst case */
 174 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
 175 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
 176
 177 static void ixgbevf_tx_timeout(struct net_device *netdev);
 178
 179 /**
 180  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 181  * @q_vector: board private structure
 182  * @tx_ring: tx ring to clean
 183  **/
 184 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 185                                  struct ixgbevf_ring *tx_ring)
 186 {
 187         struct ixgbevf_adapter *adapter = q_vector->adapter;
 188         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 189         struct ixgbevf_tx_buffer *tx_buffer_info;
 190         unsigned int i, count = 0;
 191         unsigned int total_bytes = 0, total_packets = 0;
 192
 193         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 194                 return true;
 195
 196         i = tx_ring->next_to_clean;
 197         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 198         eop_desc = tx_buffer_info->next_to_watch;
 199
 200         do {
 201                 bool cleaned = false;
 202
 203                 /* if next_to_watch is not set then there is no work pending */
 204                 if (!eop_desc)
 205                         break;
 206
 207                 /* prevent any other reads prior to eop_desc */
 208                 read_barrier_depends();
 209
 210                 /* if DD is not set pending work has not been completed */
 211                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 212                         break;
 213
 214                 /* clear next_to_watch to prevent false hangs */
 215                 tx_buffer_info->next_to_watch = NULL;
 216
 217                 for ( ; !cleaned; count++) {
 218                         struct sk_buff *skb;
 219                         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 220                         cleaned = (tx_desc == eop_desc);
 221                         skb = tx_buffer_info->skb;
 222
 223                         if (cleaned && skb) {
 224                                 unsigned int segs, bytecount;
 225
 226                                 /* gso_segs is currently only valid for tcp */
 227                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 228                                 /* multiply data chunks by size of headers */
 229                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 230                                             skb->len;
 231                                 total_packets += segs;
 232                                 total_bytes += bytecount;
 233                         }
 234
 235                         ixgbevf_unmap_and_free_tx_resource(tx_ring,
 236                                                            tx_buffer_info);
 237
 238                         tx_desc->wb.status = 0;
 239
 240                         i++;
 241                         if (i == tx_ring->count)
 242                                 i = 0;
 243
 244                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 245                 }
 246
 247                 eop_desc = tx_buffer_info->next_to_watch;
 248         } while (count < tx_ring->count);
 249
 250         tx_ring->next_to_clean = i;
 251
 252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 253         if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
 254                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 255                 /* Make sure that anybody stopping the queue after this
 256                  * sees the new next_to_clean.
 257                  */
 258                 smp_mb();
 259                 if (__netif_subqueue_stopped(tx_ring->netdev,
 260                                              tx_ring->queue_index) &&
 261                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 262                         netif_wake_subqueue(tx_ring->netdev,
 263                                             tx_ring->queue_index);
 264                         ++adapter->restart_queue;
 265                 }
 266         }
 267
 268         u64_stats_update_begin(&tx_ring->syncp);
 269         tx_ring->total_bytes += total_bytes;
 270         tx_ring->total_packets += total_packets;
 271         u64_stats_update_end(&tx_ring->syncp);
 272         q_vector->tx.total_bytes += total_bytes;
 273         q_vector->tx.total_packets += total_packets;
 274
 275         return count < tx_ring->count;
 276 }
 277
 278 /**
 279  * ixgbevf_receive_skb - Send a completed packet up the stack
 280  * @q_vector: structure containing interrupt and ring information
 281  * @skb: packet to send up
 282  * @status: hardware indication of status of receive
 283  * @rx_desc: rx descriptor
 284  **/
 285 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
 286                                 struct sk_buff *skb, u8 status,
 287                                 union ixgbe_adv_rx_desc *rx_desc)
 288 {
 289         struct ixgbevf_adapter *adapter = q_vector->adapter;
 290         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 291         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 292
 293         if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
 294                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
 295
 296         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
 297                 napi_gro_receive(&q_vector->napi, skb);
 298         else
 299                 netif_rx(skb);
 300 }
 301
 302 /**
 303  * ixgbevf_rx_skb - Helper function to determine proper Rx method
 304  * @q_vector: structure containing interrupt and ring information
 305  * @skb: packet to send up
 306  * @status: hardware indication of status of receive
 307  * @rx_desc: rx descriptor
 308  **/
 309 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
 310                            struct sk_buff *skb, u8 status,
 311                            union ixgbe_adv_rx_desc *rx_desc)
 312 {
 313 #ifdef CONFIG_NET_RX_BUSY_POLL
 314         skb_mark_napi_id(skb, &q_vector->napi);
 315
 316         if (ixgbevf_qv_busy_polling(q_vector)) {
 317                 netif_receive_skb(skb);
 318                 /* exit early if we busy polled */
 319                 return;
 320         }
 321 #endif /* CONFIG_NET_RX_BUSY_POLL */
 322
 323         ixgbevf_receive_skb(q_vector, skb, status, rx_desc);
 324 }
 325
 326 /**
 327  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 328  * @ring: pointer to Rx descriptor ring structure
 329  * @status_err: hardware indication of status of receive
 330  * @skb: skb currently being received and modified
 331  **/
 332 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 333                                        u32 status_err, struct sk_buff *skb)
 334 {
 335         skb_checksum_none_assert(skb);
 336
 337         /* Rx csum disabled */
 338         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 339                 return;
 340
 341         /* if IP and error */
 342         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 343             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 344                 ring->hw_csum_rx_error++;
 345                 return;
 346         }
 347
 348         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 349                 return;
 350
 351         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 352                 ring->hw_csum_rx_error++;
 353                 return;
 354         }
 355
 356         /* It must be a TCP or UDP packet with a valid checksum */
 357         skb->ip_summed = CHECKSUM_UNNECESSARY;
 358         ring->hw_csum_rx_good++;
 359 }
 360
 361 /**
 362  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 363  * @adapter: address of board private structure
 364  **/
 365 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 366                                      struct ixgbevf_ring *rx_ring,
 367                                      int cleaned_count)
 368 {
 369         struct pci_dev *pdev = adapter->pdev;
 370         union ixgbe_adv_rx_desc *rx_desc;
 371         struct ixgbevf_rx_buffer *bi;
 372         unsigned int i = rx_ring->next_to_use;
 373
 374         bi = &rx_ring->rx_buffer_info[i];
 375
 376         while (cleaned_count--) {
 377                 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 378
 379                 if (!bi->skb) {
 380                         struct sk_buff *skb;
 381
 382                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 383                                                         rx_ring->rx_buf_len);
 384                         if (!skb) {
 385                                 adapter->alloc_rx_buff_failed++;
 386                                 goto no_buffers;
 387                         }
 388                         bi->skb = skb;
 389
 390                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 391                                                  rx_ring->rx_buf_len,
 392                                                  DMA_FROM_DEVICE);
 393                         if (dma_mapping_error(&pdev->dev, bi->dma)) {
 394                                 dev_kfree_skb(skb);
 395                                 bi->skb = NULL;
 396                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 397                                 break;
 398                         }
 399                 }
 400                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 401
 402                 i++;
 403                 if (i == rx_ring->count)
 404                         i = 0;
 405                 bi = &rx_ring->rx_buffer_info[i];
 406         }
 407
 408 no_buffers:
 409         if (rx_ring->next_to_use != i) {
 410                 rx_ring->next_to_use = i;
 411                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 412         }
 413 }
 414
 415 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 416                                              u32 qmask)
 417 {
 418         struct ixgbe_hw *hw = &adapter->hw;
 419
 420         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 421 }
 422
 423 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 424                                 struct ixgbevf_ring *rx_ring,
 425                                 int budget)
 426 {
 427         struct ixgbevf_adapter *adapter = q_vector->adapter;
 428         struct pci_dev *pdev = adapter->pdev;
 429         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 430         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 431         struct sk_buff *skb;
 432         unsigned int i;
 433         u32 len, staterr;
 434         int cleaned_count = 0;
 435         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 436
 437         i = rx_ring->next_to_clean;
 438         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 439         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 440         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 441
 442         while (staterr & IXGBE_RXD_STAT_DD) {
 443                 if (!budget)
 444                         break;
 445                 budget--;
 446
 447                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 448                 len = le16_to_cpu(rx_desc->wb.upper.length);
 449                 skb = rx_buffer_info->skb;
 450                 prefetch(skb->data - NET_IP_ALIGN);
 451                 rx_buffer_info->skb = NULL;
 452
 453                 if (rx_buffer_info->dma) {
 454                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 455                                          rx_ring->rx_buf_len,
 456                                          DMA_FROM_DEVICE);
 457                         rx_buffer_info->dma = 0;
 458                         skb_put(skb, len);
 459                 }
 460
 461                 i++;
 462                 if (i == rx_ring->count)
 463                         i = 0;
 464
 465                 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
 466                 prefetch(next_rxd);
 467                 cleaned_count++;
 468
 469                 next_buffer = &rx_ring->rx_buffer_info[i];
 470
 471                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 472                         skb->next = next_buffer->skb;
 473                         IXGBE_CB(skb->next)->prev = skb;
 474                         adapter->non_eop_descs++;
 475                         goto next_desc;
 476                 }
 477
 478                 /* we should not be chaining buffers, if we did drop the skb */
 479                 if (IXGBE_CB(skb)->prev) {
 480                         do {
 481                                 struct sk_buff *this = skb;
 482                                 skb = IXGBE_CB(skb)->prev;
 483                                 dev_kfree_skb(this);
 484                         } while (skb);
 485                         goto next_desc;
 486                 }
 487
 488                 /* ERR_MASK will only have valid bits if EOP set */
 489                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 490                         dev_kfree_skb_irq(skb);
 491                         goto next_desc;
 492                 }
 493
 494                 ixgbevf_rx_checksum(rx_ring, staterr, skb);
 495
 496                 /* probably a little skewed due to removing CRC */
 497                 total_rx_bytes += skb->len;
 498                 total_rx_packets++;
 499
 500                 /*
 501                  * Work around issue of some types of VM to VM loop back
 502                  * packets not getting split correctly
 503                  */
 504                 if (staterr & IXGBE_RXD_STAT_LB) {
 505                         u32 header_fixup_len = skb_headlen(skb);
 506                         if (header_fixup_len < 14)
 507                                 skb_push(skb, header_fixup_len);
 508                 }
 509                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 510
 511                 /* Workaround hardware that can't do proper VEPA multicast
 512                  * source pruning.
 513                  */
 514                 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
 515                     ether_addr_equal(adapter->netdev->dev_addr,
 516                                      eth_hdr(skb)->h_source)) {
 517                         dev_kfree_skb_irq(skb);
 518                         goto next_desc;
 519                 }
 520
 521                 ixgbevf_rx_skb(q_vector, skb, staterr, rx_desc);
 522
 523 next_desc:
 524                 rx_desc->wb.upper.status_error = 0;
 525
 526                 /* return some buffers to hardware, one at a time is too slow */
 527                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 528                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 529                                                  cleaned_count);
 530                         cleaned_count = 0;
 531                 }
 532
 533                 /* use prefetched values */
 534                 rx_desc = next_rxd;
 535                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 536
 537                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 538         }
 539
 540         rx_ring->next_to_clean = i;
 541         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 542
 543         if (cleaned_count)
 544                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 545
 546         u64_stats_update_begin(&rx_ring->syncp);
 547         rx_ring->total_packets += total_rx_packets;
 548         rx_ring->total_bytes += total_rx_bytes;
 549         u64_stats_update_end(&rx_ring->syncp);
 550         q_vector->rx.total_packets += total_rx_packets;
 551         q_vector->rx.total_bytes += total_rx_bytes;
 552
 553         return total_rx_packets;
 554 }
 555
 556 /**
 557  * ixgbevf_poll - NAPI polling calback
 558  * @napi: napi struct with our devices info in it
 559  * @budget: amount of work driver is allowed to do this pass, in packets
 560  *
 561  * This function will clean more than one or more rings associated with a
 562  * q_vector.
 563  **/
 564 static int ixgbevf_poll(struct napi_struct *napi, int budget)
 565 {
 566         struct ixgbevf_q_vector *q_vector =
 567                 container_of(napi, struct ixgbevf_q_vector, napi);
 568         struct ixgbevf_adapter *adapter = q_vector->adapter;
 569         struct ixgbevf_ring *ring;
 570         int per_ring_budget;
 571         bool clean_complete = true;
 572
 573         ixgbevf_for_each_ring(ring, q_vector->tx)
 574                 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
 575
 576 #ifdef CONFIG_NET_RX_BUSY_POLL
 577         if (!ixgbevf_qv_lock_napi(q_vector))
 578                 return budget;
 579 #endif
 580
 581         /* attempt to distribute budget to each queue fairly, but don't allow
 582          * the budget to go below 1 because we'll exit polling */
 583         if (q_vector->rx.count > 1)
 584                 per_ring_budget = max(budget/q_vector->rx.count, 1);
 585         else
 586                 per_ring_budget = budget;
 587
 588         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
 589         ixgbevf_for_each_ring(ring, q_vector->rx)
 590                 clean_complete &= (ixgbevf_clean_rx_irq(q_vector, ring,
 591                                                         per_ring_budget)
 592                                    < per_ring_budget);
 593         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
 594
 595 #ifdef CONFIG_NET_RX_BUSY_POLL
 596         ixgbevf_qv_unlock_napi(q_vector);
 597 #endif
 598
 599         /* If all work not completed, return budget and keep polling */
 600         if (!clean_complete)
 601                 return budget;
 602         /* all work done, exit the polling mode */
 603         napi_complete(napi);
 604         if (adapter->rx_itr_setting & 1)
 605                 ixgbevf_set_itr(q_vector);
 606         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 607                 ixgbevf_irq_enable_queues(adapter,
 608                                           1 << q_vector->v_idx);
 609
 610         return 0;
 611 }
 612
 613 /**
 614  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 615  * @q_vector: structure containing interrupt and ring information
 616  */
 617 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
 618 {
 619         struct ixgbevf_adapter *adapter = q_vector->adapter;
 620         struct ixgbe_hw *hw = &adapter->hw;
 621         int v_idx = q_vector->v_idx;
 622         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
 623
 624         /*
 625          * set the WDIS bit to not clear the timer bits and cause an
 626          * immediate assertion of the interrupt
 627          */
 628         itr_reg |= IXGBE_EITR_CNT_WDIS;
 629
 630         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 631 }
 632
 633 #ifdef CONFIG_NET_RX_BUSY_POLL
 634 /* must be called with local_bh_disable()d */
 635 static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
 636 {
 637         struct ixgbevf_q_vector *q_vector =
 638                         container_of(napi, struct ixgbevf_q_vector, napi);
 639         struct ixgbevf_adapter *adapter = q_vector->adapter;
 640         struct ixgbevf_ring  *ring;
 641         int found = 0;
 642
 643         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 644                 return LL_FLUSH_FAILED;
 645
 646         if (!ixgbevf_qv_lock_poll(q_vector))
 647                 return LL_FLUSH_BUSY;
 648
 649         ixgbevf_for_each_ring(ring, q_vector->rx) {
 650                 found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
 651 #ifdef BP_EXTENDED_STATS
 652                 if (found)
 653                         ring->bp_cleaned += found;
 654                 else
 655                         ring->bp_misses++;
 656 #endif
 657                 if (found)
 658                         break;
 659         }
 660
 661         ixgbevf_qv_unlock_poll(q_vector);
 662
 663         return found;
 664 }
 665 #endif /* CONFIG_NET_RX_BUSY_POLL */
 666
 667 /**
 668  * ixgbevf_configure_msix - Configure MSI-X hardware
 669  * @adapter: board private structure
 670  *
 671  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 672  * interrupts.
 673  **/
 674 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 675 {
 676         struct ixgbevf_q_vector *q_vector;
 677         int q_vectors, v_idx;
 678
 679         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 680         adapter->eims_enable_mask = 0;
 681
 682         /*
 683          * Populate the IVAR table and set the ITR values to the
 684          * corresponding register.
 685          */
 686         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 687                 struct ixgbevf_ring *ring;
 688                 q_vector = adapter->q_vector[v_idx];
 689
 690                 ixgbevf_for_each_ring(ring, q_vector->rx)
 691                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
 692
 693                 ixgbevf_for_each_ring(ring, q_vector->tx)
 694                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
 695
 696                 if (q_vector->tx.ring && !q_vector->rx.ring) {
 697                         /* tx only vector */
 698                         if (adapter->tx_itr_setting == 1)
 699                                 q_vector->itr = IXGBE_10K_ITR;
 700                         else
 701                                 q_vector->itr = adapter->tx_itr_setting;
 702                 } else {
 703                         /* rx or rx/tx vector */
 704                         if (adapter->rx_itr_setting == 1)
 705                                 q_vector->itr = IXGBE_20K_ITR;
 706                         else
 707                                 q_vector->itr = adapter->rx_itr_setting;
 708                 }
 709
 710                 /* add q_vector eims value to global eims_enable_mask */
 711                 adapter->eims_enable_mask |= 1 << v_idx;
 712
 713                 ixgbevf_write_eitr(q_vector);
 714         }
 715
 716         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 717         /* setup eims_other and add value to global eims_enable_mask */
 718         adapter->eims_other = 1 << v_idx;
 719         adapter->eims_enable_mask |= adapter->eims_other;
 720 }
 721
 722 enum latency_range {
 723         lowest_latency = 0,
 724         low_latency = 1,
 725         bulk_latency = 2,
 726         latency_invalid = 255
 727 };
 728
 729 /**
 730  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 731  * @q_vector: structure containing interrupt and ring information
 732  * @ring_container: structure containing ring performance data
 733  *
 734  *      Stores a new ITR value based on packets and byte
 735  *      counts during the last interrupt.  The advantage of per interrupt
 736  *      computation is faster updates and more accurate ITR for the current
 737  *      traffic pattern.  Constants in this function were computed
 738  *      based on theoretical maximum wire speed and thresholds were set based
 739  *      on testing data as well as attempting to minimize response time
 740  *      while increasing bulk throughput.
 741  **/
 742 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
 743                                struct ixgbevf_ring_container *ring_container)
 744 {
 745         int bytes = ring_container->total_bytes;
 746         int packets = ring_container->total_packets;
 747         u32 timepassed_us;
 748         u64 bytes_perint;
 749         u8 itr_setting = ring_container->itr;
 750
 751         if (packets == 0)
 752                 return;
 753
 754         /* simple throttlerate management
 755          *    0-20MB/s lowest (100000 ints/s)
 756          *   20-100MB/s low   (20000 ints/s)
 757          *  100-1249MB/s bulk (8000 ints/s)
 758          */
 759         /* what was last interrupt timeslice? */
 760         timepassed_us = q_vector->itr >> 2;
 761         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 762
 763         switch (itr_setting) {
 764         case lowest_latency:
 765                 if (bytes_perint > 10)
 766                         itr_setting = low_latency;
 767                 break;
 768         case low_latency:
 769                 if (bytes_perint > 20)
 770                         itr_setting = bulk_latency;
 771                 else if (bytes_perint <= 10)
 772                         itr_setting = lowest_latency;
 773                 break;
 774         case bulk_latency:
 775                 if (bytes_perint <= 20)
 776                         itr_setting = low_latency;
 777                 break;
 778         }
 779
 780         /* clear work counters since we have the values we need */
 781         ring_container->total_bytes = 0;
 782         ring_container->total_packets = 0;
 783
 784         /* write updated itr to ring container */
 785         ring_container->itr = itr_setting;
 786 }
 787
 788 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
 789 {
 790         u32 new_itr = q_vector->itr;
 791         u8 current_itr;
 792
 793         ixgbevf_update_itr(q_vector, &q_vector->tx);
 794         ixgbevf_update_itr(q_vector, &q_vector->rx);
 795
 796         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 797
 798         switch (current_itr) {
 799         /* counts and packets in update_itr are dependent on these numbers */
 800         case lowest_latency:
 801                 new_itr = IXGBE_100K_ITR;
 802                 break;
 803         case low_latency:
 804                 new_itr = IXGBE_20K_ITR;
 805                 break;
 806         case bulk_latency:
 807         default:
 808                 new_itr = IXGBE_8K_ITR;
 809                 break;
 810         }
 811
 812         if (new_itr != q_vector->itr) {
 813                 /* do an exponential smoothing */
 814                 new_itr = (10 * new_itr * q_vector->itr) /
 815                           ((9 * new_itr) + q_vector->itr);
 816
 817                 /* save the algorithm value here */
 818                 q_vector->itr = new_itr;
 819
 820                 ixgbevf_write_eitr(q_vector);
 821         }
 822 }
 823
 824 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
 825 {
 826         struct ixgbevf_adapter *adapter = data;
 827         struct ixgbe_hw *hw = &adapter->hw;
 828
 829         hw->mac.get_link_status = 1;
 830
 831         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 832                 mod_timer(&adapter->watchdog_timer, jiffies);
 833
 834         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
 835
 836         return IRQ_HANDLED;
 837 }
 838
 839 /**
 840  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
 841  * @irq: unused
 842  * @data: pointer to our q_vector struct for this interrupt vector
 843  **/
 844 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
 845 {
 846         struct ixgbevf_q_vector *q_vector = data;
 847
 848         /* EIAM disabled interrupts (on this vector) for us */
 849         if (q_vector->rx.ring || q_vector->tx.ring)
 850                 napi_schedule(&q_vector->napi);
 851
 852         return IRQ_HANDLED;
 853 }
 854
 855 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
 856                                      int r_idx)
 857 {
 858         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 859
 860         a->rx_ring[r_idx].next = q_vector->rx.ring;
 861         q_vector->rx.ring = &a->rx_ring[r_idx];
 862         q_vector->rx.count++;
 863 }
 864
 865 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
 866                                      int t_idx)
 867 {
 868         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 869
 870         a->tx_ring[t_idx].next = q_vector->tx.ring;
 871         q_vector->tx.ring = &a->tx_ring[t_idx];
 872         q_vector->tx.count++;
 873 }
 874
 875 /**
 876  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
 877  * @adapter: board private structure to initialize
 878  *
 879  * This function maps descriptor rings to the queue-specific vectors
 880  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 881  * one vector per ring/queue, but on a constrained vector budget, we
 882  * group the rings as "efficiently" as possible.  You would add new
 883  * mapping configurations in here.
 884  **/
 885 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
 886 {
 887         int q_vectors;
 888         int v_start = 0;
 889         int rxr_idx = 0, txr_idx = 0;
 890         int rxr_remaining = adapter->num_rx_queues;
 891         int txr_remaining = adapter->num_tx_queues;
 892         int i, j;
 893         int rqpv, tqpv;
 894         int err = 0;
 895
 896         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 897
 898         /*
 899          * The ideal configuration...
 900          * We have enough vectors to map one per queue.
 901          */
 902         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
 903                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 904                         map_vector_to_rxq(adapter, v_start, rxr_idx);
 905
 906                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 907                         map_vector_to_txq(adapter, v_start, txr_idx);
 908                 goto out;
 909         }
 910
 911         /*
 912          * If we don't have enough vectors for a 1-to-1
 913          * mapping, we'll have to group them so there are
 914          * multiple queues per vector.
 915          */
 916         /* Re-adjusting *qpv takes care of the remainder. */
 917         for (i = v_start; i < q_vectors; i++) {
 918                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 919                 for (j = 0; j < rqpv; j++) {
 920                         map_vector_to_rxq(adapter, i, rxr_idx);
 921                         rxr_idx++;
 922                         rxr_remaining--;
 923                 }
 924         }
 925         for (i = v_start; i < q_vectors; i++) {
 926                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 927                 for (j = 0; j < tqpv; j++) {
 928                         map_vector_to_txq(adapter, i, txr_idx);
 929                         txr_idx++;
 930                         txr_remaining--;
 931                 }
 932         }
 933
 934 out:
 935         return err;
 936 }
 937
 938 /**
 939  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
 940  * @adapter: board private structure
 941  *
 942  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
 943  * interrupts from the kernel.
 944  **/
 945 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
 946 {
 947         struct net_device *netdev = adapter->netdev;
 948         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 949         int vector, err;
 950         int ri = 0, ti = 0;
 951
 952         for (vector = 0; vector < q_vectors; vector++) {
 953                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
 954                 struct msix_entry *entry = &adapter->msix_entries[vector];
 955
 956                 if (q_vector->tx.ring && q_vector->rx.ring) {
 957                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 958                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
 959                         ti++;
 960                 } else if (q_vector->rx.ring) {
 961                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 962                                  "%s-%s-%d", netdev->name, "rx", ri++);
 963                 } else if (q_vector->tx.ring) {
 964                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 965                                  "%s-%s-%d", netdev->name, "tx", ti++);
 966                 } else {
 967                         /* skip this unused q_vector */
 968                         continue;
 969                 }
 970                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
 971                                   q_vector->name, q_vector);
 972                 if (err) {
 973                         hw_dbg(&adapter->hw,
 974                                "request_irq failed for MSIX interrupt "
 975                                "Error: %d\n", err);
 976                         goto free_queue_irqs;
 977                 }
 978         }
 979
 980         err = request_irq(adapter->msix_entries[vector].vector,
 981                           &ixgbevf_msix_other, 0, netdev->name, adapter);
 982         if (err) {
 983                 hw_dbg(&adapter->hw,
 984                        "request_irq for msix_other failed: %d\n", err);
 985                 goto free_queue_irqs;
 986         }
 987
 988         return 0;
 989
 990 free_queue_irqs:
 991         while (vector) {
 992                 vector--;
 993                 free_irq(adapter->msix_entries[vector].vector,
 994                          adapter->q_vector[vector]);
 995         }
 996         /* This failure is non-recoverable - it indicates the system is
 997          * out of MSIX vector resources and the VF driver cannot run
 998          * without them.  Set the number of msix vectors to zero
 999          * indicating that not enough can be allocated.  The error
1000          * will be returned to the user indicating device open failed.
1001          * Any further attempts to force the driver to open will also
1002          * fail.  The only way to recover is to unload the driver and
1003          * reload it again.  If the system has recovered some MSIX
1004          * vectors then it may succeed.
1005          */
1006         adapter->num_msix_vectors = 0;
1007         return err;
1008 }
1009
1010 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1011 {
1012         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1013
1014         for (i = 0; i < q_vectors; i++) {
1015                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1016                 q_vector->rx.ring = NULL;
1017                 q_vector->tx.ring = NULL;
1018                 q_vector->rx.count = 0;
1019                 q_vector->tx.count = 0;
1020         }
1021 }
1022
1023 /**
1024  * ixgbevf_request_irq - initialize interrupts
1025  * @adapter: board private structure
1026  *
1027  * Attempts to configure interrupts using the best available
1028  * capabilities of the hardware and kernel.
1029  **/
1030 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1031 {
1032         int err = 0;
1033
1034         err = ixgbevf_request_msix_irqs(adapter);
1035
1036         if (err)
1037                 hw_dbg(&adapter->hw,
1038                        "request_irq failed, Error %d\n", err);
1039
1040         return err;
1041 }
1042
1043 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1044 {
1045         int i, q_vectors;
1046
1047         q_vectors = adapter->num_msix_vectors;
1048         i = q_vectors - 1;
1049
1050         free_irq(adapter->msix_entries[i].vector, adapter);
1051         i--;
1052
1053         for (; i >= 0; i--) {
1054                 /* free only the irqs that were actually requested */
1055                 if (!adapter->q_vector[i]->rx.ring &&
1056                     !adapter->q_vector[i]->tx.ring)
1057                         continue;
1058
1059                 free_irq(adapter->msix_entries[i].vector,
1060                          adapter->q_vector[i]);
1061         }
1062
1063         ixgbevf_reset_q_vectors(adapter);
1064 }
1065
1066 /**
1067  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1068  * @adapter: board private structure
1069  **/
1070 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1071 {
1072         struct ixgbe_hw *hw = &adapter->hw;
1073         int i;
1074
1075         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1076         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1077         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1078
1079         IXGBE_WRITE_FLUSH(hw);
1080
1081         for (i = 0; i < adapter->num_msix_vectors; i++)
1082                 synchronize_irq(adapter->msix_entries[i].vector);
1083 }
1084
1085 /**
1086  * ixgbevf_irq_enable - Enable default interrupt generation settings
1087  * @adapter: board private structure
1088  **/
1089 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1090 {
1091         struct ixgbe_hw *hw = &adapter->hw;
1092
1093         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1094         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1095         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1096 }
1097
1098 /**
1099  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1100  * @adapter: board private structure
1101  *
1102  * Configure the Tx unit of the MAC after a reset.
1103  **/
1104 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1105 {
1106         u64 tdba;
1107         struct ixgbe_hw *hw = &adapter->hw;
1108         u32 i, j, tdlen, txctrl;
1109
1110         /* Setup the HW Tx Head and Tail descriptor pointers */
1111         for (i = 0; i < adapter->num_tx_queues; i++) {
1112                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1113                 j = ring->reg_idx;
1114                 tdba = ring->dma;
1115                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1116                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1117                                 (tdba & DMA_BIT_MASK(32)));
1118                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1119                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1120                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1121                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1122                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1123                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1124                 /* Disable Tx Head Writeback RO bit, since this hoses
1125                  * bookkeeping if things aren't delivered in order.
1126                  */
1127                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1128                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1129                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1130         }
1131 }
1132
1133 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1134
1135 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1136 {
1137         struct ixgbevf_ring *rx_ring;
1138         struct ixgbe_hw *hw = &adapter->hw;
1139         u32 srrctl;
1140
1141         rx_ring = &adapter->rx_ring[index];
1142
1143         srrctl = IXGBE_SRRCTL_DROP_EN;
1144
1145         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1146
1147         srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1148                   IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1149
1150         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1151 }
1152
1153 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1154 {
1155         struct ixgbe_hw *hw = &adapter->hw;
1156
1157         /* PSRTYPE must be initialized in 82599 */
1158         u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1159                       IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1160                       IXGBE_PSRTYPE_L2HDR;
1161
1162         if (adapter->num_rx_queues > 1)
1163                 psrtype |= 1 << 29;
1164
1165         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1166 }
1167
1168 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1169 {
1170         struct ixgbe_hw *hw = &adapter->hw;
1171         struct net_device *netdev = adapter->netdev;
1172         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1173         int i;
1174         u16 rx_buf_len;
1175
1176         /* notify the PF of our intent to use this size of frame */
1177         ixgbevf_rlpml_set_vf(hw, max_frame);
1178
1179         /* PF will allow an extra 4 bytes past for vlan tagged frames */
1180         max_frame += VLAN_HLEN;
1181
1182         /*
1183          * Allocate buffer sizes that fit well into 32K and
1184          * take into account max frame size of 9.5K
1185          */
1186         if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1187             (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1188                 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1189         else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1190                 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1191         else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1192                 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1193         else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1194                 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1195         else
1196                 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1197
1198         for (i = 0; i < adapter->num_rx_queues; i++)
1199                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1200 }
1201
1202 /**
1203  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1204  * @adapter: board private structure
1205  *
1206  * Configure the Rx unit of the MAC after a reset.
1207  **/
1208 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1209 {
1210         u64 rdba;
1211         struct ixgbe_hw *hw = &adapter->hw;
1212         int i, j;
1213         u32 rdlen;
1214
1215         ixgbevf_setup_psrtype(adapter);
1216
1217         /* set_rx_buffer_len must be called before ring initialization */
1218         ixgbevf_set_rx_buffer_len(adapter);
1219
1220         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1221         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1222          * the Base and Length of the Rx Descriptor Ring */
1223         for (i = 0; i < adapter->num_rx_queues; i++) {
1224                 rdba = adapter->rx_ring[i].dma;
1225                 j = adapter->rx_ring[i].reg_idx;
1226                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1227                                 (rdba & DMA_BIT_MASK(32)));
1228                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1229                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1230                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1231                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1232                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1233                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1234
1235                 ixgbevf_configure_srrctl(adapter, j);
1236         }
1237 }
1238
1239 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1240                                    __be16 proto, u16 vid)
1241 {
1242         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1243         struct ixgbe_hw *hw = &adapter->hw;
1244         int err;
1245
1246         spin_lock_bh(&adapter->mbx_lock);
1247
1248         /* add VID to filter table */
1249         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1250
1251         spin_unlock_bh(&adapter->mbx_lock);
1252
1253         /* translate error return types so error makes sense */
1254         if (err == IXGBE_ERR_MBX)
1255                 return -EIO;
1256
1257         if (err == IXGBE_ERR_INVALID_ARGUMENT)
1258                 return -EACCES;
1259
1260         set_bit(vid, adapter->active_vlans);
1261
1262         return err;
1263 }
1264
1265 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1266                                     __be16 proto, u16 vid)
1267 {
1268         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1269         struct ixgbe_hw *hw = &adapter->hw;
1270         int err = -EOPNOTSUPP;
1271
1272         spin_lock_bh(&adapter->mbx_lock);
1273
1274         /* remove VID from filter table */
1275         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1276
1277         spin_unlock_bh(&adapter->mbx_lock);
1278
1279         clear_bit(vid, adapter->active_vlans);
1280
1281         return err;
1282 }
1283
1284 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1285 {
1286         u16 vid;
1287
1288         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1289                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1290                                         htons(ETH_P_8021Q), vid);
1291 }
1292
1293 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1294 {
1295         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1296         struct ixgbe_hw *hw = &adapter->hw;
1297         int count = 0;
1298
1299         if ((netdev_uc_count(netdev)) > 10) {
1300                 pr_err("Too many unicast filters - No Space\n");
1301                 return -ENOSPC;
1302         }
1303
1304         if (!netdev_uc_empty(netdev)) {
1305                 struct netdev_hw_addr *ha;
1306                 netdev_for_each_uc_addr(ha, netdev) {
1307                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1308                         udelay(200);
1309                 }
1310         } else {
1311                 /*
1312                  * If the list is empty then send message to PF driver to
1313                  * clear all macvlans on this VF.
1314                  */
1315                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1316         }
1317
1318         return count;
1319 }
1320
1321 /**
1322  * ixgbevf_set_rx_mode - Multicast and unicast set
1323  * @netdev: network interface device structure
1324  *
1325  * The set_rx_method entry point is called whenever the multicast address
1326  * list, unicast address list or the network interface flags are updated.
1327  * This routine is responsible for configuring the hardware for proper
1328  * multicast mode and configuring requested unicast filters.
1329  **/
1330 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1331 {
1332         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1333         struct ixgbe_hw *hw = &adapter->hw;
1334
1335         spin_lock_bh(&adapter->mbx_lock);
1336
1337         /* reprogram multicast list */
1338         hw->mac.ops.update_mc_addr_list(hw, netdev);
1339
1340         ixgbevf_write_uc_addr_list(netdev);
1341
1342         spin_unlock_bh(&adapter->mbx_lock);
1343 }
1344
1345 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1346 {
1347         int q_idx;
1348         struct ixgbevf_q_vector *q_vector;
1349         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1350
1351         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1352                 q_vector = adapter->q_vector[q_idx];
1353 #ifdef CONFIG_NET_RX_BUSY_POLL
1354                 ixgbevf_qv_init_lock(adapter->q_vector[q_idx]);
1355 #endif
1356                 napi_enable(&q_vector->napi);
1357         }
1358 }
1359
1360 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1361 {
1362         int q_idx;
1363         struct ixgbevf_q_vector *q_vector;
1364         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1365
1366         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1367                 q_vector = adapter->q_vector[q_idx];
1368                 napi_disable(&q_vector->napi);
1369 #ifdef CONFIG_NET_RX_BUSY_POLL
1370                 while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) {
1371                         pr_info("QV %d locked\n", q_idx);
1372                         usleep_range(1000, 20000);
1373                 }
1374 #endif /* CONFIG_NET_RX_BUSY_POLL */
1375         }
1376 }
1377
1378 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1379 {
1380         struct net_device *netdev = adapter->netdev;
1381         int i;
1382
1383         ixgbevf_set_rx_mode(netdev);
1384
1385         ixgbevf_restore_vlan(adapter);
1386
1387         ixgbevf_configure_tx(adapter);
1388         ixgbevf_configure_rx(adapter);
1389         for (i = 0; i < adapter->num_rx_queues; i++) {
1390                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1391                 ixgbevf_alloc_rx_buffers(adapter, ring,
1392                                          IXGBE_DESC_UNUSED(ring));
1393         }
1394 }
1395
1396 #define IXGBEVF_MAX_RX_DESC_POLL 10
1397 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1398                                          int rxr)
1399 {
1400         struct ixgbe_hw *hw = &adapter->hw;
1401         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1402         u32 rxdctl;
1403         int j = adapter->rx_ring[rxr].reg_idx;
1404
1405         do {
1406                 usleep_range(1000, 2000);
1407                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1408         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1409
1410         if (!wait_loop)
1411                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not set while polling\n",
1412                        rxr);
1413
1414         ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1415                                 (adapter->rx_ring[rxr].count - 1));
1416 }
1417
1418 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1419                                      struct ixgbevf_ring *ring)
1420 {
1421         struct ixgbe_hw *hw = &adapter->hw;
1422         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1423         u32 rxdctl;
1424         u8 reg_idx = ring->reg_idx;
1425
1426         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1427         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1428
1429         /* write value back with RXDCTL.ENABLE bit cleared */
1430         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1431
1432         /* the hardware may take up to 100us to really disable the rx queue */
1433         do {
1434                 udelay(10);
1435                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1436         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1437
1438         if (!wait_loop)
1439                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not cleared while polling\n",
1440                        reg_idx);
1441 }
1442
1443 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1444 {
1445         /* Only save pre-reset stats if there are some */
1446         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1447                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1448                         adapter->stats.base_vfgprc;
1449                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1450                         adapter->stats.base_vfgptc;
1451                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1452                         adapter->stats.base_vfgorc;
1453                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1454                         adapter->stats.base_vfgotc;
1455                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1456                         adapter->stats.base_vfmprc;
1457         }
1458 }
1459
1460 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1461 {
1462         struct ixgbe_hw *hw = &adapter->hw;
1463
1464         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1465         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1466         adapter->stats.last_vfgorc |=
1467                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1468         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1469         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1470         adapter->stats.last_vfgotc |=
1471                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1472         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1473
1474         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1475         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1476         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1477         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1478         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1479 }
1480
1481 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1482 {
1483         struct ixgbe_hw *hw = &adapter->hw;
1484         int api[] = { ixgbe_mbox_api_11,
1485                       ixgbe_mbox_api_10,
1486                       ixgbe_mbox_api_unknown };
1487         int err = 0, idx = 0;
1488
1489         spin_lock_bh(&adapter->mbx_lock);
1490
1491         while (api[idx] != ixgbe_mbox_api_unknown) {
1492                 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1493                 if (!err)
1494                         break;
1495                 idx++;
1496         }
1497
1498         spin_unlock_bh(&adapter->mbx_lock);
1499 }
1500
1501 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1502 {
1503         struct net_device *netdev = adapter->netdev;
1504         struct ixgbe_hw *hw = &adapter->hw;
1505         int i, j = 0;
1506         int num_rx_rings = adapter->num_rx_queues;
1507         u32 txdctl, rxdctl;
1508
1509         for (i = 0; i < adapter->num_tx_queues; i++) {
1510                 j = adapter->tx_ring[i].reg_idx;
1511                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1512                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1513                 txdctl |= (8 << 16);
1514                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1515         }
1516
1517         for (i = 0; i < adapter->num_tx_queues; i++) {
1518                 j = adapter->tx_ring[i].reg_idx;
1519                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1520                 txdctl |= IXGBE_TXDCTL_ENABLE;
1521                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1522         }
1523
1524         for (i = 0; i < num_rx_rings; i++) {
1525                 j = adapter->rx_ring[i].reg_idx;
1526                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1527                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1528                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1529                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1530                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1531                                    IXGBE_RXDCTL_RLPML_EN);
1532                 }
1533                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1534                 ixgbevf_rx_desc_queue_enable(adapter, i);
1535         }
1536
1537         ixgbevf_configure_msix(adapter);
1538
1539         spin_lock_bh(&adapter->mbx_lock);
1540
1541         if (is_valid_ether_addr(hw->mac.addr))
1542                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1543         else
1544                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1545
1546         spin_unlock_bh(&adapter->mbx_lock);
1547
1548         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1549         ixgbevf_napi_enable_all(adapter);
1550
1551         /* enable transmits */
1552         netif_tx_start_all_queues(netdev);
1553
1554         ixgbevf_save_reset_stats(adapter);
1555         ixgbevf_init_last_counter_stats(adapter);
1556
1557         hw->mac.get_link_status = 1;
1558         mod_timer(&adapter->watchdog_timer, jiffies);
1559 }
1560
1561 static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter)
1562 {
1563         struct ixgbe_hw *hw = &adapter->hw;
1564         struct ixgbevf_ring *rx_ring;
1565         unsigned int def_q = 0;
1566         unsigned int num_tcs = 0;
1567         unsigned int num_rx_queues = 1;
1568         int err, i;
1569
1570         spin_lock_bh(&adapter->mbx_lock);
1571
1572         /* fetch queue configuration from the PF */
1573         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1574
1575         spin_unlock_bh(&adapter->mbx_lock);
1576
1577         if (err)
1578                 return err;
1579
1580         if (num_tcs > 1) {
1581                 /* update default Tx ring register index */
1582                 adapter->tx_ring[0].reg_idx = def_q;
1583
1584                 /* we need as many queues as traffic classes */
1585                 num_rx_queues = num_tcs;
1586         }
1587
1588         /* nothing to do if we have the correct number of queues */
1589         if (adapter->num_rx_queues == num_rx_queues)
1590                 return 0;
1591
1592         /* allocate new rings */
1593         rx_ring = kcalloc(num_rx_queues,
1594                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
1595         if (!rx_ring)
1596                 return -ENOMEM;
1597
1598         /* setup ring fields */
1599         for (i = 0; i < num_rx_queues; i++) {
1600                 rx_ring[i].count = adapter->rx_ring_count;
1601                 rx_ring[i].queue_index = i;
1602                 rx_ring[i].reg_idx = i;
1603                 rx_ring[i].dev = &adapter->pdev->dev;
1604                 rx_ring[i].netdev = adapter->netdev;
1605
1606                 /* allocate resources on the ring */
1607                 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
1608                 if (err) {
1609                         while (i) {
1610                                 i--;
1611                                 ixgbevf_free_rx_resources(adapter, &rx_ring[i]);
1612                         }
1613                         kfree(rx_ring);
1614                         return err;
1615                 }
1616         }
1617
1618         /* free the existing rings and queues */
1619         ixgbevf_free_all_rx_resources(adapter);
1620         adapter->num_rx_queues = 0;
1621         kfree(adapter->rx_ring);
1622
1623         /* move new rings into position on the adapter struct */
1624         adapter->rx_ring = rx_ring;
1625         adapter->num_rx_queues = num_rx_queues;
1626
1627         /* reset ring to vector mapping */
1628         ixgbevf_reset_q_vectors(adapter);
1629         ixgbevf_map_rings_to_vectors(adapter);
1630
1631         return 0;
1632 }
1633
1634 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1635 {
1636         struct ixgbe_hw *hw = &adapter->hw;
1637
1638         ixgbevf_reset_queues(adapter);
1639
1640         ixgbevf_configure(adapter);
1641
1642         ixgbevf_up_complete(adapter);
1643
1644         /* clear any pending interrupts, may auto mask */
1645         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1646
1647         ixgbevf_irq_enable(adapter);
1648 }
1649
1650 /**
1651  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1652  * @adapter: board private structure
1653  * @rx_ring: ring to free buffers from
1654  **/
1655 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1656                                   struct ixgbevf_ring *rx_ring)
1657 {
1658         struct pci_dev *pdev = adapter->pdev;
1659         unsigned long size;
1660         unsigned int i;
1661
1662         if (!rx_ring->rx_buffer_info)
1663                 return;
1664
1665         /* Free all the Rx ring sk_buffs */
1666         for (i = 0; i < rx_ring->count; i++) {
1667                 struct ixgbevf_rx_buffer *rx_buffer_info;
1668
1669                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1670                 if (rx_buffer_info->dma) {
1671                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1672                                          rx_ring->rx_buf_len,
1673                                          DMA_FROM_DEVICE);
1674                         rx_buffer_info->dma = 0;
1675                 }
1676                 if (rx_buffer_info->skb) {
1677                         struct sk_buff *skb = rx_buffer_info->skb;
1678                         rx_buffer_info->skb = NULL;
1679                         do {
1680                                 struct sk_buff *this = skb;
1681                                 skb = IXGBE_CB(skb)->prev;
1682                                 dev_kfree_skb(this);
1683                         } while (skb);
1684                 }
1685         }
1686
1687         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1688         memset(rx_ring->rx_buffer_info, 0, size);
1689
1690         /* Zero out the descriptor ring */
1691         memset(rx_ring->desc, 0, rx_ring->size);
1692
1693         rx_ring->next_to_clean = 0;
1694         rx_ring->next_to_use = 0;
1695
1696         if (rx_ring->head)
1697                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1698         if (rx_ring->tail)
1699                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1700 }
1701
1702 /**
1703  * ixgbevf_clean_tx_ring - Free Tx Buffers
1704  * @adapter: board private structure
1705  * @tx_ring: ring to be cleaned
1706  **/
1707 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1708                                   struct ixgbevf_ring *tx_ring)
1709 {
1710         struct ixgbevf_tx_buffer *tx_buffer_info;
1711         unsigned long size;
1712         unsigned int i;
1713
1714         if (!tx_ring->tx_buffer_info)
1715                 return;
1716
1717         /* Free all the Tx ring sk_buffs */
1718         for (i = 0; i < tx_ring->count; i++) {
1719                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1720                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1721         }
1722
1723         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1724         memset(tx_ring->tx_buffer_info, 0, size);
1725
1726         memset(tx_ring->desc, 0, tx_ring->size);
1727
1728         tx_ring->next_to_use = 0;
1729         tx_ring->next_to_clean = 0;
1730
1731         if (tx_ring->head)
1732                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1733         if (tx_ring->tail)
1734                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1735 }
1736
1737 /**
1738  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1739  * @adapter: board private structure
1740  **/
1741 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1742 {
1743         int i;
1744
1745         for (i = 0; i < adapter->num_rx_queues; i++)
1746                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1747 }
1748
1749 /**
1750  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1751  * @adapter: board private structure
1752  **/
1753 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1754 {
1755         int i;
1756
1757         for (i = 0; i < adapter->num_tx_queues; i++)
1758                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1759 }
1760
1761 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1762 {
1763         struct net_device *netdev = adapter->netdev;
1764         struct ixgbe_hw *hw = &adapter->hw;
1765         u32 txdctl;
1766         int i, j;
1767
1768         /* signal that we are down to the interrupt handler */
1769         set_bit(__IXGBEVF_DOWN, &adapter->state);
1770
1771         /* disable all enabled rx queues */
1772         for (i = 0; i < adapter->num_rx_queues; i++)
1773                 ixgbevf_disable_rx_queue(adapter, &adapter->rx_ring[i]);
1774
1775         netif_tx_disable(netdev);
1776
1777         msleep(10);
1778
1779         netif_tx_stop_all_queues(netdev);
1780
1781         ixgbevf_irq_disable(adapter);
1782
1783         ixgbevf_napi_disable_all(adapter);
1784
1785         del_timer_sync(&adapter->watchdog_timer);
1786         /* can't call flush scheduled work here because it can deadlock
1787          * if linkwatch_event tries to acquire the rtnl_lock which we are
1788          * holding */
1789         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1790                 msleep(1);
1791
1792         /* disable transmits in the hardware now that interrupts are off */
1793         for (i = 0; i < adapter->num_tx_queues; i++) {
1794                 j = adapter->tx_ring[i].reg_idx;
1795                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1796                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1797                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1798         }
1799
1800         netif_carrier_off(netdev);
1801
1802         if (!pci_channel_offline(adapter->pdev))
1803                 ixgbevf_reset(adapter);
1804
1805         ixgbevf_clean_all_tx_rings(adapter);
1806         ixgbevf_clean_all_rx_rings(adapter);
1807 }
1808
1809 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1810 {
1811         WARN_ON(in_interrupt());
1812
1813         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1814                 msleep(1);
1815
1816         ixgbevf_down(adapter);
1817         ixgbevf_up(adapter);
1818
1819         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1820 }
1821
1822 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1823 {
1824         struct ixgbe_hw *hw = &adapter->hw;
1825         struct net_device *netdev = adapter->netdev;
1826
1827         if (hw->mac.ops.reset_hw(hw)) {
1828                 hw_dbg(hw, "PF still resetting\n");
1829         } else {
1830                 hw->mac.ops.init_hw(hw);
1831                 ixgbevf_negotiate_api(adapter);
1832         }
1833
1834         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1835                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1836                        netdev->addr_len);
1837                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1838                        netdev->addr_len);
1839         }
1840 }
1841
1842 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1843                                         int vectors)
1844 {
1845         int err = 0;
1846         int vector_threshold;
1847
1848         /* We'll want at least 2 (vector_threshold):
1849          * 1) TxQ[0] + RxQ[0] handler
1850          * 2) Other (Link Status Change, etc.)
1851          */
1852         vector_threshold = MIN_MSIX_COUNT;
1853
1854         /* The more we get, the more we will assign to Tx/Rx Cleanup
1855          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1856          * Right now, we simply care about how many we'll get; we'll
1857          * set them up later while requesting irq's.
1858          */
1859         while (vectors >= vector_threshold) {
1860                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1861                                       vectors);
1862                 if (!err || err < 0) /* Success or a nasty failure. */
1863                         break;
1864                 else /* err == number of vectors we should try again with */
1865                         vectors = err;
1866         }
1867
1868         if (vectors < vector_threshold)
1869                 err = -ENOMEM;
1870
1871         if (err) {
1872                 dev_err(&adapter->pdev->dev,
1873                         "Unable to allocate MSI-X interrupts\n");
1874                 kfree(adapter->msix_entries);
1875                 adapter->msix_entries = NULL;
1876         } else {
1877                 /*
1878                  * Adjust for only the vectors we'll use, which is minimum
1879                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1880                  * vectors we were allocated.
1881                  */
1882                 adapter->num_msix_vectors = vectors;
1883         }
1884
1885         return err;
1886 }
1887
1888 /**
1889  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1890  * @adapter: board private structure to initialize
1891  *
1892  * This is the top level queue allocation routine.  The order here is very
1893  * important, starting with the "most" number of features turned on at once,
1894  * and ending with the smallest set of features.  This way large combinations
1895  * can be allocated if they're turned on, and smaller combinations are the
1896  * fallthrough conditions.
1897  *
1898  **/
1899 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1900 {
1901         /* Start with base case */
1902         adapter->num_rx_queues = 1;
1903         adapter->num_tx_queues = 1;
1904 }
1905
1906 /**
1907  * ixgbevf_alloc_queues - Allocate memory for all rings
1908  * @adapter: board private structure to initialize
1909  *
1910  * We allocate one ring per queue at run-time since we don't know the
1911  * number of queues at compile-time.  The polling_netdev array is
1912  * intended for Multiqueue, but should work fine with a single queue.
1913  **/
1914 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1915 {
1916         int i;
1917
1918         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1919                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1920         if (!adapter->tx_ring)
1921                 goto err_tx_ring_allocation;
1922
1923         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1924                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1925         if (!adapter->rx_ring)
1926                 goto err_rx_ring_allocation;
1927
1928         for (i = 0; i < adapter->num_tx_queues; i++) {
1929                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1930                 adapter->tx_ring[i].queue_index = i;
1931                 /* reg_idx may be remapped later by DCB config */
1932                 adapter->tx_ring[i].reg_idx = i;
1933                 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1934                 adapter->tx_ring[i].netdev = adapter->netdev;
1935         }
1936
1937         for (i = 0; i < adapter->num_rx_queues; i++) {
1938                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1939                 adapter->rx_ring[i].queue_index = i;
1940                 adapter->rx_ring[i].reg_idx = i;
1941                 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1942                 adapter->rx_ring[i].netdev = adapter->netdev;
1943         }
1944
1945         return 0;
1946
1947 err_rx_ring_allocation:
1948         kfree(adapter->tx_ring);
1949 err_tx_ring_allocation:
1950         return -ENOMEM;
1951 }
1952
1953 /**
1954  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1955  * @adapter: board private structure to initialize
1956  *
1957  * Attempt to configure the interrupts using the best available
1958  * capabilities of the hardware and the kernel.
1959  **/
1960 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1961 {
1962         struct net_device *netdev = adapter->netdev;
1963         int err = 0;
1964         int vector, v_budget;
1965
1966         /*
1967          * It's easy to be greedy for MSI-X vectors, but it really
1968          * doesn't do us much good if we have a lot more vectors
1969          * than CPU's.  So let's be conservative and only ask for
1970          * (roughly) the same number of vectors as there are CPU's.
1971          * The default is to use pairs of vectors.
1972          */
1973         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1974         v_budget = min_t(int, v_budget, num_online_cpus());
1975         v_budget += NON_Q_VECTORS;
1976
1977         /* A failure in MSI-X entry allocation isn't fatal, but it does
1978          * mean we disable MSI-X capabilities of the adapter. */
1979         adapter->msix_entries = kcalloc(v_budget,
1980                                         sizeof(struct msix_entry), GFP_KERNEL);
1981         if (!adapter->msix_entries) {
1982                 err = -ENOMEM;
1983                 goto out;
1984         }
1985
1986         for (vector = 0; vector < v_budget; vector++)
1987                 adapter->msix_entries[vector].entry = vector;
1988
1989         err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
1990         if (err)
1991                 goto out;
1992
1993         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
1994         if (err)
1995                 goto out;
1996
1997         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
1998
1999 out:
2000         return err;
2001 }
2002
2003 /**
2004  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2005  * @adapter: board private structure to initialize
2006  *
2007  * We allocate one q_vector per queue interrupt.  If allocation fails we
2008  * return -ENOMEM.
2009  **/
2010 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2011 {
2012         int q_idx, num_q_vectors;
2013         struct ixgbevf_q_vector *q_vector;
2014
2015         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2016
2017         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2018                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2019                 if (!q_vector)
2020                         goto err_out;
2021                 q_vector->adapter = adapter;
2022                 q_vector->v_idx = q_idx;
2023                 netif_napi_add(adapter->netdev, &q_vector->napi,
2024                                ixgbevf_poll, 64);
2025 #ifdef CONFIG_NET_RX_BUSY_POLL
2026                 napi_hash_add(&q_vector->napi);
2027 #endif
2028                 adapter->q_vector[q_idx] = q_vector;
2029         }
2030
2031         return 0;
2032
2033 err_out:
2034         while (q_idx) {
2035                 q_idx--;
2036                 q_vector = adapter->q_vector[q_idx];
2037 #ifdef CONFIG_NET_RX_BUSY_POLL
2038                 napi_hash_del(&q_vector->napi);
2039 #endif
2040                 netif_napi_del(&q_vector->napi);
2041                 kfree(q_vector);
2042                 adapter->q_vector[q_idx] = NULL;
2043         }
2044         return -ENOMEM;
2045 }
2046
2047 /**
2048  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2049  * @adapter: board private structure to initialize
2050  *
2051  * This function frees the memory allocated to the q_vectors.  In addition if
2052  * NAPI is enabled it will delete any references to the NAPI struct prior
2053  * to freeing the q_vector.
2054  **/
2055 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2056 {
2057         int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2058
2059         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2060                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2061
2062                 adapter->q_vector[q_idx] = NULL;
2063 #ifdef CONFIG_NET_RX_BUSY_POLL
2064                 napi_hash_del(&q_vector->napi);
2065 #endif
2066                 netif_napi_del(&q_vector->napi);
2067                 kfree(q_vector);
2068         }
2069 }
2070
2071 /**
2072  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2073  * @adapter: board private structure
2074  *
2075  **/
2076 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2077 {
2078         pci_disable_msix(adapter->pdev);
2079         kfree(adapter->msix_entries);
2080         adapter->msix_entries = NULL;
2081 }
2082
2083 /**
2084  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2085  * @adapter: board private structure to initialize
2086  *
2087  **/
2088 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2089 {
2090         int err;
2091
2092         /* Number of supported queues */
2093         ixgbevf_set_num_queues(adapter);
2094
2095         err = ixgbevf_set_interrupt_capability(adapter);
2096         if (err) {
2097                 hw_dbg(&adapter->hw,
2098                        "Unable to setup interrupt capabilities\n");
2099                 goto err_set_interrupt;
2100         }
2101
2102         err = ixgbevf_alloc_q_vectors(adapter);
2103         if (err) {
2104                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2105                        "vectors\n");
2106                 goto err_alloc_q_vectors;
2107         }
2108
2109         err = ixgbevf_alloc_queues(adapter);
2110         if (err) {
2111                 pr_err("Unable to allocate memory for queues\n");
2112                 goto err_alloc_queues;
2113         }
2114
2115         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2116                "Tx Queue count = %u\n",
2117                (adapter->num_rx_queues > 1) ? "Enabled" :
2118                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2119
2120         set_bit(__IXGBEVF_DOWN, &adapter->state);
2121
2122         return 0;
2123 err_alloc_queues:
2124         ixgbevf_free_q_vectors(adapter);
2125 err_alloc_q_vectors:
2126         ixgbevf_reset_interrupt_capability(adapter);
2127 err_set_interrupt:
2128         return err;
2129 }
2130
2131 /**
2132  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2133  * @adapter: board private structure to clear interrupt scheme on
2134  *
2135  * We go through and clear interrupt specific resources and reset the structure
2136  * to pre-load conditions
2137  **/
2138 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2139 {
2140         adapter->num_tx_queues = 0;
2141         adapter->num_rx_queues = 0;
2142
2143         ixgbevf_free_q_vectors(adapter);
2144         ixgbevf_reset_interrupt_capability(adapter);
2145 }
2146
2147 /**
2148  * ixgbevf_sw_init - Initialize general software structures
2149  * (struct ixgbevf_adapter)
2150  * @adapter: board private structure to initialize
2151  *
2152  * ixgbevf_sw_init initializes the Adapter private data structure.
2153  * Fields are initialized based on PCI device information and
2154  * OS network device settings (MTU size).
2155  **/
2156 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2157 {
2158         struct ixgbe_hw *hw = &adapter->hw;
2159         struct pci_dev *pdev = adapter->pdev;
2160         struct net_device *netdev = adapter->netdev;
2161         int err;
2162
2163         /* PCI config space info */
2164
2165         hw->vendor_id = pdev->vendor;
2166         hw->device_id = pdev->device;
2167         hw->revision_id = pdev->revision;
2168         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2169         hw->subsystem_device_id = pdev->subsystem_device;
2170
2171         hw->mbx.ops.init_params(hw);
2172
2173         /* assume legacy case in which PF would only give VF 2 queues */
2174         hw->mac.max_tx_queues = 2;
2175         hw->mac.max_rx_queues = 2;
2176
2177         /* lock to protect mailbox accesses */
2178         spin_lock_init(&adapter->mbx_lock);
2179
2180         err = hw->mac.ops.reset_hw(hw);
2181         if (err) {
2182                 dev_info(&pdev->dev,
2183                          "PF still in reset state.  Is the PF interface up?\n");
2184         } else {
2185                 err = hw->mac.ops.init_hw(hw);
2186                 if (err) {
2187                         pr_err("init_shared_code failed: %d\n", err);
2188                         goto out;
2189                 }
2190                 ixgbevf_negotiate_api(adapter);
2191                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2192                 if (err)
2193                         dev_info(&pdev->dev, "Error reading MAC address\n");
2194                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2195                         dev_info(&pdev->dev,
2196                                  "MAC address not assigned by administrator.\n");
2197                 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2198         }
2199
2200         if (!is_valid_ether_addr(netdev->dev_addr)) {
2201                 dev_info(&pdev->dev, "Assigning random MAC address\n");
2202                 eth_hw_addr_random(netdev);
2203                 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2204         }
2205
2206         /* Enable dynamic interrupt throttling rates */
2207         adapter->rx_itr_setting = 1;
2208         adapter->tx_itr_setting = 1;
2209
2210         /* set default ring sizes */
2211         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2212         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2213
2214         set_bit(__IXGBEVF_DOWN, &adapter->state);
2215         return 0;
2216
2217 out:
2218         return err;
2219 }
2220
2221 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
2222         {                                                       \
2223                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
2224                 if (current_counter < last_counter)             \
2225                         counter += 0x100000000LL;               \
2226                 last_counter = current_counter;                 \
2227                 counter &= 0xFFFFFFFF00000000LL;                \
2228                 counter |= current_counter;                     \
2229         }
2230
2231 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2232         {                                                                \
2233                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2234                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2235                 u64 current_counter = (current_counter_msb << 32) |      \
2236                         current_counter_lsb;                             \
2237                 if (current_counter < last_counter)                      \
2238                         counter += 0x1000000000LL;                       \
2239                 last_counter = current_counter;                          \
2240                 counter &= 0xFFFFFFF000000000LL;                         \
2241                 counter |= current_counter;                              \
2242         }
2243 /**
2244  * ixgbevf_update_stats - Update the board statistics counters.
2245  * @adapter: board private structure
2246  **/
2247 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2248 {
2249         struct ixgbe_hw *hw = &adapter->hw;
2250         int i;
2251
2252         if (!adapter->link_up)
2253                 return;
2254
2255         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2256                                 adapter->stats.vfgprc);
2257         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2258                                 adapter->stats.vfgptc);
2259         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2260                                 adapter->stats.last_vfgorc,
2261                                 adapter->stats.vfgorc);
2262         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2263                                 adapter->stats.last_vfgotc,
2264                                 adapter->stats.vfgotc);
2265         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2266                                 adapter->stats.vfmprc);
2267
2268         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
2269                 adapter->hw_csum_rx_error +=
2270                         adapter->rx_ring[i].hw_csum_rx_error;
2271                 adapter->hw_csum_rx_good +=
2272                         adapter->rx_ring[i].hw_csum_rx_good;
2273                 adapter->rx_ring[i].hw_csum_rx_error = 0;
2274                 adapter->rx_ring[i].hw_csum_rx_good = 0;
2275         }
2276 }
2277
2278 /**
2279  * ixgbevf_watchdog - Timer Call-back
2280  * @data: pointer to adapter cast into an unsigned long
2281  **/
2282 static void ixgbevf_watchdog(unsigned long data)
2283 {
2284         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2285         struct ixgbe_hw *hw = &adapter->hw;
2286         u32 eics = 0;
2287         int i;
2288
2289         /*
2290          * Do the watchdog outside of interrupt context due to the lovely
2291          * delays that some of the newer hardware requires
2292          */
2293
2294         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2295                 goto watchdog_short_circuit;
2296
2297         /* get one bit for every active tx/rx interrupt vector */
2298         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2299                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2300                 if (qv->rx.ring || qv->tx.ring)
2301                         eics |= 1 << i;
2302         }
2303
2304         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2305
2306 watchdog_short_circuit:
2307         schedule_work(&adapter->watchdog_task);
2308 }
2309
2310 /**
2311  * ixgbevf_tx_timeout - Respond to a Tx Hang
2312  * @netdev: network interface device structure
2313  **/
2314 static void ixgbevf_tx_timeout(struct net_device *netdev)
2315 {
2316         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2317
2318         /* Do the reset outside of interrupt context */
2319         schedule_work(&adapter->reset_task);
2320 }
2321
2322 static void ixgbevf_reset_task(struct work_struct *work)
2323 {
2324         struct ixgbevf_adapter *adapter;
2325         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2326
2327         /* If we're already down or resetting, just bail */
2328         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2329             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2330                 return;
2331
2332         adapter->tx_timeout_count++;
2333
2334         ixgbevf_reinit_locked(adapter);
2335 }
2336
2337 /**
2338  * ixgbevf_watchdog_task - worker thread to bring link up
2339  * @work: pointer to work_struct containing our data
2340  **/
2341 static void ixgbevf_watchdog_task(struct work_struct *work)
2342 {
2343         struct ixgbevf_adapter *adapter = container_of(work,
2344                                                        struct ixgbevf_adapter,
2345                                                        watchdog_task);
2346         struct net_device *netdev = adapter->netdev;
2347         struct ixgbe_hw *hw = &adapter->hw;
2348         u32 link_speed = adapter->link_speed;
2349         bool link_up = adapter->link_up;
2350         s32 need_reset;
2351
2352         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2353
2354         /*
2355          * Always check the link on the watchdog because we have
2356          * no LSC interrupt
2357          */
2358         spin_lock_bh(&adapter->mbx_lock);
2359
2360         need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2361
2362         spin_unlock_bh(&adapter->mbx_lock);
2363
2364         if (need_reset) {
2365                 adapter->link_up = link_up;
2366                 adapter->link_speed = link_speed;
2367                 netif_carrier_off(netdev);
2368                 netif_tx_stop_all_queues(netdev);
2369                 schedule_work(&adapter->reset_task);
2370                 goto pf_has_reset;
2371         }
2372         adapter->link_up = link_up;
2373         adapter->link_speed = link_speed;
2374
2375         if (link_up) {
2376                 if (!netif_carrier_ok(netdev)) {
2377                         char *link_speed_string;
2378                         switch (link_speed) {
2379                         case IXGBE_LINK_SPEED_10GB_FULL:
2380                                 link_speed_string = "10 Gbps";
2381                                 break;
2382                         case IXGBE_LINK_SPEED_1GB_FULL:
2383                                 link_speed_string = "1 Gbps";
2384                                 break;
2385                         case IXGBE_LINK_SPEED_100_FULL:
2386                                 link_speed_string = "100 Mbps";
2387                                 break;
2388                         default:
2389                                 link_speed_string = "unknown speed";
2390                                 break;
2391                         }
2392                         dev_info(&adapter->pdev->dev,
2393                                 "NIC Link is Up, %s\n", link_speed_string);
2394                         netif_carrier_on(netdev);
2395                         netif_tx_wake_all_queues(netdev);
2396                 }
2397         } else {
2398                 adapter->link_up = false;
2399                 adapter->link_speed = 0;
2400                 if (netif_carrier_ok(netdev)) {
2401                         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2402                         netif_carrier_off(netdev);
2403                         netif_tx_stop_all_queues(netdev);
2404                 }
2405         }
2406
2407         ixgbevf_update_stats(adapter);
2408
2409 pf_has_reset:
2410         /* Reset the timer */
2411         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2412                 mod_timer(&adapter->watchdog_timer,
2413                           round_jiffies(jiffies + (2 * HZ)));
2414
2415         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2416 }
2417
2418 /**
2419  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2420  * @adapter: board private structure
2421  * @tx_ring: Tx descriptor ring for a specific queue
2422  *
2423  * Free all transmit software resources
2424  **/
2425 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2426                                struct ixgbevf_ring *tx_ring)
2427 {
2428         struct pci_dev *pdev = adapter->pdev;
2429
2430         ixgbevf_clean_tx_ring(adapter, tx_ring);
2431
2432         vfree(tx_ring->tx_buffer_info);
2433         tx_ring->tx_buffer_info = NULL;
2434
2435         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2436                           tx_ring->dma);
2437
2438         tx_ring->desc = NULL;
2439 }
2440
2441 /**
2442  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2443  * @adapter: board private structure
2444  *
2445  * Free all transmit software resources
2446  **/
2447 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2448 {
2449         int i;
2450
2451         for (i = 0; i < adapter->num_tx_queues; i++)
2452                 if (adapter->tx_ring[i].desc)
2453                         ixgbevf_free_tx_resources(adapter,
2454                                                   &adapter->tx_ring[i]);
2455
2456 }
2457
2458 /**
2459  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2460  * @adapter: board private structure
2461  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2462  *
2463  * Return 0 on success, negative on failure
2464  **/
2465 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2466                                struct ixgbevf_ring *tx_ring)
2467 {
2468         struct pci_dev *pdev = adapter->pdev;
2469         int size;
2470
2471         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2472         tx_ring->tx_buffer_info = vzalloc(size);
2473         if (!tx_ring->tx_buffer_info)
2474                 goto err;
2475
2476         /* round up to nearest 4K */
2477         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2478         tx_ring->size = ALIGN(tx_ring->size, 4096);
2479
2480         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2481                                            &tx_ring->dma, GFP_KERNEL);
2482         if (!tx_ring->desc)
2483                 goto err;
2484
2485         tx_ring->next_to_use = 0;
2486         tx_ring->next_to_clean = 0;
2487         return 0;
2488
2489 err:
2490         vfree(tx_ring->tx_buffer_info);
2491         tx_ring->tx_buffer_info = NULL;
2492         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2493                "descriptor ring\n");
2494         return -ENOMEM;
2495 }
2496
2497 /**
2498  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2499  * @adapter: board private structure
2500  *
2501  * If this function returns with an error, then it's possible one or
2502  * more of the rings is populated (while the rest are not).  It is the
2503  * callers duty to clean those orphaned rings.
2504  *
2505  * Return 0 on success, negative on failure
2506  **/
2507 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2508 {
2509         int i, err = 0;
2510
2511         for (i = 0; i < adapter->num_tx_queues; i++) {
2512                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2513                 if (!err)
2514                         continue;
2515                 hw_dbg(&adapter->hw,
2516                        "Allocation for Tx Queue %u failed\n", i);
2517                 break;
2518         }
2519
2520         return err;
2521 }
2522
2523 /**
2524  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2525  * @adapter: board private structure
2526  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2527  *
2528  * Returns 0 on success, negative on failure
2529  **/
2530 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2531                                struct ixgbevf_ring *rx_ring)
2532 {
2533         struct pci_dev *pdev = adapter->pdev;
2534         int size;
2535
2536         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2537         rx_ring->rx_buffer_info = vzalloc(size);
2538         if (!rx_ring->rx_buffer_info)
2539                 goto alloc_failed;
2540
2541         /* Round up to nearest 4K */
2542         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2543         rx_ring->size = ALIGN(rx_ring->size, 4096);
2544
2545         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2546                                            &rx_ring->dma, GFP_KERNEL);
2547
2548         if (!rx_ring->desc) {
2549                 vfree(rx_ring->rx_buffer_info);
2550                 rx_ring->rx_buffer_info = NULL;
2551                 goto alloc_failed;
2552         }
2553
2554         rx_ring->next_to_clean = 0;
2555         rx_ring->next_to_use = 0;
2556
2557         return 0;
2558 alloc_failed:
2559         return -ENOMEM;
2560 }
2561
2562 /**
2563  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2564  * @adapter: board private structure
2565  *
2566  * If this function returns with an error, then it's possible one or
2567  * more of the rings is populated (while the rest are not).  It is the
2568  * callers duty to clean those orphaned rings.
2569  *
2570  * Return 0 on success, negative on failure
2571  **/
2572 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2573 {
2574         int i, err = 0;
2575
2576         for (i = 0; i < adapter->num_rx_queues; i++) {
2577                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2578                 if (!err)
2579                         continue;
2580                 hw_dbg(&adapter->hw,
2581                        "Allocation for Rx Queue %u failed\n", i);
2582                 break;
2583         }
2584         return err;
2585 }
2586
2587 /**
2588  * ixgbevf_free_rx_resources - Free Rx Resources
2589  * @adapter: board private structure
2590  * @rx_ring: ring to clean the resources from
2591  *
2592  * Free all receive software resources
2593  **/
2594 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2595                                struct ixgbevf_ring *rx_ring)
2596 {
2597         struct pci_dev *pdev = adapter->pdev;
2598
2599         ixgbevf_clean_rx_ring(adapter, rx_ring);
2600
2601         vfree(rx_ring->rx_buffer_info);
2602         rx_ring->rx_buffer_info = NULL;
2603
2604         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2605                           rx_ring->dma);
2606
2607         rx_ring->desc = NULL;
2608 }
2609
2610 /**
2611  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2612  * @adapter: board private structure
2613  *
2614  * Free all receive software resources
2615  **/
2616 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2617 {
2618         int i;
2619
2620         for (i = 0; i < adapter->num_rx_queues; i++)
2621                 if (adapter->rx_ring[i].desc)
2622                         ixgbevf_free_rx_resources(adapter,
2623                                                   &adapter->rx_ring[i]);
2624 }
2625
2626 static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter)
2627 {
2628         struct ixgbe_hw *hw = &adapter->hw;
2629         struct ixgbevf_ring *rx_ring;
2630         unsigned int def_q = 0;
2631         unsigned int num_tcs = 0;
2632         unsigned int num_rx_queues = 1;
2633         int err, i;
2634
2635         spin_lock_bh(&adapter->mbx_lock);
2636
2637         /* fetch queue configuration from the PF */
2638         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2639
2640         spin_unlock_bh(&adapter->mbx_lock);
2641
2642         if (err)
2643                 return err;
2644
2645         if (num_tcs > 1) {
2646                 /* update default Tx ring register index */
2647                 adapter->tx_ring[0].reg_idx = def_q;
2648
2649                 /* we need as many queues as traffic classes */
2650                 num_rx_queues = num_tcs;
2651         }
2652
2653         /* nothing to do if we have the correct number of queues */
2654         if (adapter->num_rx_queues == num_rx_queues)
2655                 return 0;
2656
2657         /* allocate new rings */
2658         rx_ring = kcalloc(num_rx_queues,
2659                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
2660         if (!rx_ring)
2661                 return -ENOMEM;
2662
2663         /* setup ring fields */
2664         for (i = 0; i < num_rx_queues; i++) {
2665                 rx_ring[i].count = adapter->rx_ring_count;
2666                 rx_ring[i].queue_index = i;
2667                 rx_ring[i].reg_idx = i;
2668                 rx_ring[i].dev = &adapter->pdev->dev;
2669                 rx_ring[i].netdev = adapter->netdev;
2670         }
2671
2672         /* free the existing ring and queues */
2673         adapter->num_rx_queues = 0;
2674         kfree(adapter->rx_ring);
2675
2676         /* move new rings into position on the adapter struct */
2677         adapter->rx_ring = rx_ring;
2678         adapter->num_rx_queues = num_rx_queues;
2679
2680         return 0;
2681 }
2682
2683 /**
2684  * ixgbevf_open - Called when a network interface is made active
2685  * @netdev: network interface device structure
2686  *
2687  * Returns 0 on success, negative value on failure
2688  *
2689  * The open entry point is called when a network interface is made
2690  * active by the system (IFF_UP).  At this point all resources needed
2691  * for transmit and receive operations are allocated, the interrupt
2692  * handler is registered with the OS, the watchdog timer is started,
2693  * and the stack is notified that the interface is ready.
2694  **/
2695 static int ixgbevf_open(struct net_device *netdev)
2696 {
2697         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2698         struct ixgbe_hw *hw = &adapter->hw;
2699         int err;
2700
2701         /* A previous failure to open the device because of a lack of
2702          * available MSIX vector resources may have reset the number
2703          * of msix vectors variable to zero.  The only way to recover
2704          * is to unload/reload the driver and hope that the system has
2705          * been able to recover some MSIX vector resources.
2706          */
2707         if (!adapter->num_msix_vectors)
2708                 return -ENOMEM;
2709
2710         /* disallow open during test */
2711         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2712                 return -EBUSY;
2713
2714         if (hw->adapter_stopped) {
2715                 ixgbevf_reset(adapter);
2716                 /* if adapter is still stopped then PF isn't up and
2717                  * the vf can't start. */
2718                 if (hw->adapter_stopped) {
2719                         err = IXGBE_ERR_MBX;
2720                         pr_err("Unable to start - perhaps the PF Driver isn't "
2721                                "up yet\n");
2722                         goto err_setup_reset;
2723                 }
2724         }
2725
2726         /* setup queue reg_idx and Rx queue count */
2727         err = ixgbevf_setup_queues(adapter);
2728         if (err)
2729                 goto err_setup_queues;
2730
2731         /* allocate transmit descriptors */
2732         err = ixgbevf_setup_all_tx_resources(adapter);
2733         if (err)
2734                 goto err_setup_tx;
2735
2736         /* allocate receive descriptors */
2737         err = ixgbevf_setup_all_rx_resources(adapter);
2738         if (err)
2739                 goto err_setup_rx;
2740
2741         ixgbevf_configure(adapter);
2742
2743         /*
2744          * Map the Tx/Rx rings to the vectors we were allotted.
2745          * if request_irq will be called in this function map_rings
2746          * must be called *before* up_complete
2747          */
2748         ixgbevf_map_rings_to_vectors(adapter);
2749
2750         ixgbevf_up_complete(adapter);
2751
2752         /* clear any pending interrupts, may auto mask */
2753         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2754         err = ixgbevf_request_irq(adapter);
2755         if (err)
2756                 goto err_req_irq;
2757
2758         ixgbevf_irq_enable(adapter);
2759
2760         return 0;
2761
2762 err_req_irq:
2763         ixgbevf_down(adapter);
2764 err_setup_rx:
2765         ixgbevf_free_all_rx_resources(adapter);
2766 err_setup_tx:
2767         ixgbevf_free_all_tx_resources(adapter);
2768 err_setup_queues:
2769         ixgbevf_reset(adapter);
2770
2771 err_setup_reset:
2772
2773         return err;
2774 }
2775
2776 /**
2777  * ixgbevf_close - Disables a network interface
2778  * @netdev: network interface device structure
2779  *
2780  * Returns 0, this is not allowed to fail
2781  *
2782  * The close entry point is called when an interface is de-activated
2783  * by the OS.  The hardware is still under the drivers control, but
2784  * needs to be disabled.  A global MAC reset is issued to stop the
2785  * hardware, and all transmit and receive resources are freed.
2786  **/
2787 static int ixgbevf_close(struct net_device *netdev)
2788 {
2789         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2790
2791         ixgbevf_down(adapter);
2792         ixgbevf_free_irq(adapter);
2793
2794         ixgbevf_free_all_tx_resources(adapter);
2795         ixgbevf_free_all_rx_resources(adapter);
2796
2797         return 0;
2798 }
2799
2800 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2801                                 u32 vlan_macip_lens, u32 type_tucmd,
2802                                 u32 mss_l4len_idx)
2803 {
2804         struct ixgbe_adv_tx_context_desc *context_desc;
2805         u16 i = tx_ring->next_to_use;
2806
2807         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2808
2809         i++;
2810         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2811
2812         /* set bits to identify this as an advanced context descriptor */
2813         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2814
2815         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
2816         context_desc->seqnum_seed       = 0;
2817         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
2818         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2819 }
2820
2821 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2822                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2823 {
2824         u32 vlan_macip_lens, type_tucmd;
2825         u32 mss_l4len_idx, l4len;
2826
2827         if (!skb_is_gso(skb))
2828                 return 0;
2829
2830         if (skb_header_cloned(skb)) {
2831                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2832                 if (err)
2833                         return err;
2834         }
2835
2836         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2837         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2838
2839         if (skb->protocol == htons(ETH_P_IP)) {
2840                 struct iphdr *iph = ip_hdr(skb);
2841                 iph->tot_len = 0;
2842                 iph->check = 0;
2843                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2844                                                          iph->daddr, 0,
2845                                                          IPPROTO_TCP,
2846                                                          0);
2847                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2848         } else if (skb_is_gso_v6(skb)) {
2849                 ipv6_hdr(skb)->payload_len = 0;
2850                 tcp_hdr(skb)->check =
2851                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2852                                      &ipv6_hdr(skb)->daddr,
2853                                      0, IPPROTO_TCP, 0);
2854         }
2855
2856         /* compute header lengths */
2857         l4len = tcp_hdrlen(skb);
2858         *hdr_len += l4len;
2859         *hdr_len = skb_transport_offset(skb) + l4len;
2860
2861         /* mss_l4len_id: use 1 as index for TSO */
2862         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2863         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2864         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2865
2866         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2867         vlan_macip_lens = skb_network_header_len(skb);
2868         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2869         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2870
2871         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2872                             type_tucmd, mss_l4len_idx);
2873
2874         return 1;
2875 }
2876
2877 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2878                             struct sk_buff *skb, u32 tx_flags)
2879 {
2880         u32 vlan_macip_lens = 0;
2881         u32 mss_l4len_idx = 0;
2882         u32 type_tucmd = 0;
2883
2884         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2885                 u8 l4_hdr = 0;
2886                 switch (skb->protocol) {
2887                 case __constant_htons(ETH_P_IP):
2888                         vlan_macip_lens |= skb_network_header_len(skb);
2889                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2890                         l4_hdr = ip_hdr(skb)->protocol;
2891                         break;
2892                 case __constant_htons(ETH_P_IPV6):
2893                         vlan_macip_lens |= skb_network_header_len(skb);
2894                         l4_hdr = ipv6_hdr(skb)->nexthdr;
2895                         break;
2896                 default:
2897                         if (unlikely(net_ratelimit())) {
2898                                 dev_warn(tx_ring->dev,
2899                                  "partial checksum but proto=%x!\n",
2900                                  skb->protocol);
2901                         }
2902                         break;
2903                 }
2904
2905                 switch (l4_hdr) {
2906                 case IPPROTO_TCP:
2907                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2908                         mss_l4len_idx = tcp_hdrlen(skb) <<
2909                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2910                         break;
2911                 case IPPROTO_SCTP:
2912                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2913                         mss_l4len_idx = sizeof(struct sctphdr) <<
2914                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2915                         break;
2916                 case IPPROTO_UDP:
2917                         mss_l4len_idx = sizeof(struct udphdr) <<
2918                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2919                         break;
2920                 default:
2921                         if (unlikely(net_ratelimit())) {
2922                                 dev_warn(tx_ring->dev,
2923                                  "partial checksum but l4 proto=%x!\n",
2924                                  l4_hdr);
2925                         }
2926                         break;
2927                 }
2928         }
2929
2930         /* vlan_macip_lens: MACLEN, VLAN tag */
2931         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2932         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2933
2934         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2935                             type_tucmd, mss_l4len_idx);
2936
2937         return (skb->ip_summed == CHECKSUM_PARTIAL);
2938 }
2939
2940 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2941                           struct sk_buff *skb, u32 tx_flags)
2942 {
2943         struct ixgbevf_tx_buffer *tx_buffer_info;
2944         unsigned int len;
2945         unsigned int total = skb->len;
2946         unsigned int offset = 0, size;
2947         int count = 0;
2948         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2949         unsigned int f;
2950         int i;
2951
2952         i = tx_ring->next_to_use;
2953
2954         len = min(skb_headlen(skb), total);
2955         while (len) {
2956                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2957                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2958
2959                 tx_buffer_info->length = size;
2960                 tx_buffer_info->mapped_as_page = false;
2961                 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2962                                                      skb->data + offset,
2963                                                      size, DMA_TO_DEVICE);
2964                 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2965                         goto dma_error;
2966
2967                 len -= size;
2968                 total -= size;
2969                 offset += size;
2970                 count++;
2971                 i++;
2972                 if (i == tx_ring->count)
2973                         i = 0;
2974         }
2975
2976         for (f = 0; f < nr_frags; f++) {
2977                 const struct skb_frag_struct *frag;
2978
2979                 frag = &skb_shinfo(skb)->frags[f];
2980                 len = min((unsigned int)skb_frag_size(frag), total);
2981                 offset = 0;
2982
2983                 while (len) {
2984                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2985                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2986
2987                         tx_buffer_info->length = size;
2988                         tx_buffer_info->dma =
2989                                 skb_frag_dma_map(tx_ring->dev, frag,
2990                                                  offset, size, DMA_TO_DEVICE);
2991                         if (dma_mapping_error(tx_ring->dev,
2992                                               tx_buffer_info->dma))
2993                                 goto dma_error;
2994                         tx_buffer_info->mapped_as_page = true;
2995
2996                         len -= size;
2997                         total -= size;
2998                         offset += size;
2999                         count++;
3000                         i++;
3001                         if (i == tx_ring->count)
3002                                 i = 0;
3003                 }
3004                 if (total == 0)
3005                         break;
3006         }
3007
3008         if (i == 0)
3009                 i = tx_ring->count - 1;
3010         else
3011                 i = i - 1;
3012         tx_ring->tx_buffer_info[i].skb = skb;
3013
3014         return count;
3015
3016 dma_error:
3017         dev_err(tx_ring->dev, "TX DMA map failed\n");
3018
3019         /* clear timestamp and dma mappings for failed tx_buffer_info map */
3020         tx_buffer_info->dma = 0;
3021         count--;
3022
3023         /* clear timestamp and dma mappings for remaining portion of packet */
3024         while (count >= 0) {
3025                 count--;
3026                 i--;
3027                 if (i < 0)
3028                         i += tx_ring->count;
3029                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3030                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3031         }
3032
3033         return count;
3034 }
3035
3036 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
3037                              int count, unsigned int first, u32 paylen,
3038                              u8 hdr_len)
3039 {
3040         union ixgbe_adv_tx_desc *tx_desc = NULL;
3041         struct ixgbevf_tx_buffer *tx_buffer_info;
3042         u32 olinfo_status = 0, cmd_type_len = 0;
3043         unsigned int i;
3044
3045         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3046
3047         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3048
3049         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3050
3051         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3052                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3053
3054         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3055                 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
3056
3057         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3058                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3059
3060                 /* use index 1 context for tso */
3061                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3062                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3063                         olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
3064         }
3065
3066         /*
3067          * Check Context must be set if Tx switch is enabled, which it
3068          * always is for case where virtual functions are running
3069          */
3070         olinfo_status |= IXGBE_ADVTXD_CC;
3071
3072         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3073
3074         i = tx_ring->next_to_use;
3075         while (count--) {
3076                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3077                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3078                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3079                 tx_desc->read.cmd_type_len =
3080                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3081                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3082                 i++;
3083                 if (i == tx_ring->count)
3084                         i = 0;
3085         }
3086
3087         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3088
3089         tx_ring->tx_buffer_info[first].time_stamp = jiffies;
3090
3091         /* Force memory writes to complete before letting h/w
3092          * know there are new descriptors to fetch.  (Only
3093          * applicable for weak-ordered memory model archs,
3094          * such as IA-64).
3095          */
3096         wmb();
3097
3098         tx_ring->tx_buffer_info[first].next_to_watch = tx_desc;
3099         tx_ring->next_to_use = i;
3100 }
3101
3102 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3103 {
3104         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3105
3106         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3107         /* Herbert's original patch had:
3108          *  smp_mb__after_netif_stop_queue();
3109          * but since that doesn't exist yet, just open code it. */
3110         smp_mb();
3111
3112         /* We need to check again in a case another CPU has just
3113          * made room available. */
3114         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3115                 return -EBUSY;
3116
3117         /* A reprieve! - use start_queue because it doesn't call schedule */
3118         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3119         ++adapter->restart_queue;
3120         return 0;
3121 }
3122
3123 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3124 {
3125         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3126                 return 0;
3127         return __ixgbevf_maybe_stop_tx(tx_ring, size);
3128 }
3129
3130 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3131 {
3132         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3133         struct ixgbevf_ring *tx_ring;
3134         unsigned int first;
3135         unsigned int tx_flags = 0;
3136         u8 hdr_len = 0;
3137         int r_idx = 0, tso;
3138         u16 count = TXD_USE_COUNT(skb_headlen(skb));
3139 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3140         unsigned short f;
3141 #endif
3142         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3143         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3144                 dev_kfree_skb(skb);
3145                 return NETDEV_TX_OK;
3146         }
3147
3148         tx_ring = &adapter->tx_ring[r_idx];
3149
3150         /*
3151          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3152          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3153          *       + 2 desc gap to keep tail from touching head,
3154          *       + 1 desc for context descriptor,
3155          * otherwise try next time
3156          */
3157 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3158         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3159                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3160 #else
3161         count += skb_shinfo(skb)->nr_frags;
3162 #endif
3163         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3164                 adapter->tx_busy++;
3165                 return NETDEV_TX_BUSY;
3166         }
3167
3168         if (vlan_tx_tag_present(skb)) {
3169                 tx_flags |= vlan_tx_tag_get(skb);
3170                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3171                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3172         }
3173
3174         first = tx_ring->next_to_use;
3175
3176         if (skb->protocol == htons(ETH_P_IP))
3177                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3178         tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
3179         if (tso < 0) {
3180                 dev_kfree_skb_any(skb);
3181                 return NETDEV_TX_OK;
3182         }
3183
3184         if (tso)
3185                 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
3186         else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
3187                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3188
3189         ixgbevf_tx_queue(tx_ring, tx_flags,
3190                          ixgbevf_tx_map(tx_ring, skb, tx_flags),
3191                          first, skb->len, hdr_len);
3192
3193         writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
3194
3195         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3196
3197         return NETDEV_TX_OK;
3198 }
3199
3200 /**
3201  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3202  * @netdev: network interface device structure
3203  * @p: pointer to an address structure
3204  *
3205  * Returns 0 on success, negative on failure
3206  **/
3207 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3208 {
3209         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3210         struct ixgbe_hw *hw = &adapter->hw;
3211         struct sockaddr *addr = p;
3212
3213         if (!is_valid_ether_addr(addr->sa_data))
3214                 return -EADDRNOTAVAIL;
3215
3216         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3217         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3218
3219         spin_lock_bh(&adapter->mbx_lock);
3220
3221         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3222
3223         spin_unlock_bh(&adapter->mbx_lock);
3224
3225         return 0;
3226 }
3227
3228 /**
3229  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3230  * @netdev: network interface device structure
3231  * @new_mtu: new value for maximum frame size
3232  *
3233  * Returns 0 on success, negative on failure
3234  **/
3235 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3236 {
3237         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3238         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3239         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3240
3241         switch (adapter->hw.api_version) {
3242         case ixgbe_mbox_api_11:
3243                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3244                 break;
3245         default:
3246                 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3247                         max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3248                 break;
3249         }
3250
3251         /* MTU < 68 is an error and causes problems on some kernels */
3252         if ((new_mtu < 68) || (max_frame > max_possible_frame))
3253                 return -EINVAL;
3254
3255         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3256                netdev->mtu, new_mtu);
3257         /* must set new MTU before calling down or up */
3258         netdev->mtu = new_mtu;
3259
3260         if (netif_running(netdev))
3261                 ixgbevf_reinit_locked(adapter);
3262
3263         return 0;
3264 }
3265
3266 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3267 {
3268         struct net_device *netdev = pci_get_drvdata(pdev);
3269         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3270 #ifdef CONFIG_PM
3271         int retval = 0;
3272 #endif
3273
3274         netif_device_detach(netdev);
3275
3276         if (netif_running(netdev)) {
3277                 rtnl_lock();
3278                 ixgbevf_down(adapter);
3279                 ixgbevf_free_irq(adapter);
3280                 ixgbevf_free_all_tx_resources(adapter);
3281                 ixgbevf_free_all_rx_resources(adapter);
3282                 rtnl_unlock();
3283         }
3284
3285         ixgbevf_clear_interrupt_scheme(adapter);
3286
3287 #ifdef CONFIG_PM
3288         retval = pci_save_state(pdev);
3289         if (retval)
3290                 return retval;
3291
3292 #endif
3293         pci_disable_device(pdev);
3294
3295         return 0;
3296 }
3297
3298 #ifdef CONFIG_PM
3299 static int ixgbevf_resume(struct pci_dev *pdev)
3300 {
3301         struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
3302         struct net_device *netdev = adapter->netdev;
3303         u32 err;
3304
3305         pci_set_power_state(pdev, PCI_D0);
3306         pci_restore_state(pdev);
3307         /*
3308          * pci_restore_state clears dev->state_saved so call
3309          * pci_save_state to restore it.
3310          */
3311         pci_save_state(pdev);
3312
3313         err = pci_enable_device_mem(pdev);
3314         if (err) {
3315                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3316                 return err;
3317         }
3318         pci_set_master(pdev);
3319
3320         ixgbevf_reset(adapter);
3321
3322         rtnl_lock();
3323         err = ixgbevf_init_interrupt_scheme(adapter);
3324         rtnl_unlock();
3325         if (err) {
3326                 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3327                 return err;
3328         }
3329
3330         if (netif_running(netdev)) {
3331                 err = ixgbevf_open(netdev);
3332                 if (err)
3333                         return err;
3334         }
3335
3336         netif_device_attach(netdev);
3337
3338         return err;
3339 }
3340
3341 #endif /* CONFIG_PM */
3342 static void ixgbevf_shutdown(struct pci_dev *pdev)
3343 {
3344         ixgbevf_suspend(pdev, PMSG_SUSPEND);
3345 }
3346
3347 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3348                                                 struct rtnl_link_stats64 *stats)
3349 {
3350         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3351         unsigned int start;
3352         u64 bytes, packets;
3353         const struct ixgbevf_ring *ring;
3354         int i;
3355
3356         ixgbevf_update_stats(adapter);
3357
3358         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3359
3360         for (i = 0; i < adapter->num_rx_queues; i++) {
3361                 ring = &adapter->rx_ring[i];
3362                 do {
3363                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3364                         bytes = ring->total_bytes;
3365                         packets = ring->total_packets;
3366                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3367                 stats->rx_bytes += bytes;
3368                 stats->rx_packets += packets;
3369         }
3370
3371         for (i = 0; i < adapter->num_tx_queues; i++) {
3372                 ring = &adapter->tx_ring[i];
3373                 do {
3374                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3375                         bytes = ring->total_bytes;
3376                         packets = ring->total_packets;
3377                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3378                 stats->tx_bytes += bytes;
3379                 stats->tx_packets += packets;
3380         }
3381
3382         return stats;
3383 }
3384
3385 static const struct net_device_ops ixgbevf_netdev_ops = {
3386         .ndo_open               = ixgbevf_open,
3387         .ndo_stop               = ixgbevf_close,
3388         .ndo_start_xmit         = ixgbevf_xmit_frame,
3389         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3390         .ndo_get_stats64        = ixgbevf_get_stats,
3391         .ndo_validate_addr      = eth_validate_addr,
3392         .ndo_set_mac_address    = ixgbevf_set_mac,
3393         .ndo_change_mtu         = ixgbevf_change_mtu,
3394         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3395         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3396         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3397 #ifdef CONFIG_NET_RX_BUSY_POLL
3398         .ndo_busy_poll          = ixgbevf_busy_poll_recv,
3399 #endif
3400 };
3401
3402 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3403 {
3404         dev->netdev_ops = &ixgbevf_netdev_ops;
3405         ixgbevf_set_ethtool_ops(dev);
3406         dev->watchdog_timeo = 5 * HZ;
3407 }
3408
3409 /**
3410  * ixgbevf_probe - Device Initialization Routine
3411  * @pdev: PCI device information struct
3412  * @ent: entry in ixgbevf_pci_tbl
3413  *
3414  * Returns 0 on success, negative on failure
3415  *
3416  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3417  * The OS initialization, configuring of the adapter private structure,
3418  * and a hardware reset occur.
3419  **/
3420 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3421 {
3422         struct net_device *netdev;
3423         struct ixgbevf_adapter *adapter = NULL;
3424         struct ixgbe_hw *hw = NULL;
3425         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3426         static int cards_found;
3427         int err, pci_using_dac;
3428
3429         err = pci_enable_device(pdev);
3430         if (err)
3431                 return err;
3432
3433         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3434             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3435                 pci_using_dac = 1;
3436         } else {
3437                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3438                 if (err) {
3439                         err = dma_set_coherent_mask(&pdev->dev,
3440                                                     DMA_BIT_MASK(32));
3441                         if (err) {
3442                                 dev_err(&pdev->dev, "No usable DMA "
3443                                         "configuration, aborting\n");
3444                                 goto err_dma;
3445                         }
3446                 }
3447                 pci_using_dac = 0;
3448         }
3449
3450         err = pci_request_regions(pdev, ixgbevf_driver_name);
3451         if (err) {
3452                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3453                 goto err_pci_reg;
3454         }
3455
3456         pci_set_master(pdev);
3457
3458         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3459                                    MAX_TX_QUEUES);
3460         if (!netdev) {
3461                 err = -ENOMEM;
3462                 goto err_alloc_etherdev;
3463         }
3464
3465         SET_NETDEV_DEV(netdev, &pdev->dev);
3466
3467         pci_set_drvdata(pdev, netdev);
3468         adapter = netdev_priv(netdev);
3469
3470         adapter->netdev = netdev;
3471         adapter->pdev = pdev;
3472         hw = &adapter->hw;
3473         hw->back = adapter;
3474         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3475
3476         /*
3477          * call save state here in standalone driver because it relies on
3478          * adapter struct to exist, and needs to call netdev_priv
3479          */
3480         pci_save_state(pdev);
3481
3482         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3483                               pci_resource_len(pdev, 0));
3484         if (!hw->hw_addr) {
3485                 err = -EIO;
3486                 goto err_ioremap;
3487         }
3488
3489         ixgbevf_assign_netdev_ops(netdev);
3490
3491         adapter->bd_number = cards_found;
3492
3493         /* Setup hw api */
3494         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3495         hw->mac.type  = ii->mac;
3496
3497         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3498                sizeof(struct ixgbe_mbx_operations));
3499
3500         /* setup the private structure */
3501         err = ixgbevf_sw_init(adapter);
3502         if (err)
3503                 goto err_sw_init;
3504
3505         /* The HW MAC address was set and/or determined in sw_init */
3506         if (!is_valid_ether_addr(netdev->dev_addr)) {
3507                 pr_err("invalid MAC address\n");
3508                 err = -EIO;
3509                 goto err_sw_init;
3510         }
3511
3512         netdev->hw_features = NETIF_F_SG |
3513                            NETIF_F_IP_CSUM |
3514                            NETIF_F_IPV6_CSUM |
3515                            NETIF_F_TSO |
3516                            NETIF_F_TSO6 |
3517                            NETIF_F_RXCSUM;
3518
3519         netdev->features = netdev->hw_features |
3520                            NETIF_F_HW_VLAN_CTAG_TX |
3521                            NETIF_F_HW_VLAN_CTAG_RX |
3522                            NETIF_F_HW_VLAN_CTAG_FILTER;
3523
3524         netdev->vlan_features |= NETIF_F_TSO;
3525         netdev->vlan_features |= NETIF_F_TSO6;
3526         netdev->vlan_features |= NETIF_F_IP_CSUM;
3527         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3528         netdev->vlan_features |= NETIF_F_SG;
3529
3530         if (pci_using_dac)
3531                 netdev->features |= NETIF_F_HIGHDMA;
3532
3533         netdev->priv_flags |= IFF_UNICAST_FLT;
3534
3535         init_timer(&adapter->watchdog_timer);
3536         adapter->watchdog_timer.function = ixgbevf_watchdog;
3537         adapter->watchdog_timer.data = (unsigned long)adapter;
3538
3539         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3540         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3541
3542         err = ixgbevf_init_interrupt_scheme(adapter);
3543         if (err)
3544                 goto err_sw_init;
3545
3546         strcpy(netdev->name, "eth%d");
3547
3548         err = register_netdev(netdev);
3549         if (err)
3550                 goto err_register;
3551
3552         netif_carrier_off(netdev);
3553
3554         ixgbevf_init_last_counter_stats(adapter);
3555
3556         /* print the MAC address */
3557         hw_dbg(hw, "%pM\n", netdev->dev_addr);
3558
3559         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3560
3561         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3562         cards_found++;
3563         return 0;
3564
3565 err_register:
3566         ixgbevf_clear_interrupt_scheme(adapter);
3567 err_sw_init:
3568         ixgbevf_reset_interrupt_capability(adapter);
3569         iounmap(hw->hw_addr);
3570 err_ioremap:
3571         free_netdev(netdev);
3572 err_alloc_etherdev:
3573         pci_release_regions(pdev);
3574 err_pci_reg:
3575 err_dma:
3576         pci_disable_device(pdev);
3577         return err;
3578 }
3579
3580 /**
3581  * ixgbevf_remove - Device Removal Routine
3582  * @pdev: PCI device information struct
3583  *
3584  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3585  * that it should release a PCI device.  The could be caused by a
3586  * Hot-Plug event, or because the driver is going to be removed from
3587  * memory.
3588  **/
3589 static void ixgbevf_remove(struct pci_dev *pdev)
3590 {
3591         struct net_device *netdev = pci_get_drvdata(pdev);
3592         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3593
3594         set_bit(__IXGBEVF_DOWN, &adapter->state);
3595
3596         del_timer_sync(&adapter->watchdog_timer);
3597
3598         cancel_work_sync(&adapter->reset_task);
3599         cancel_work_sync(&adapter->watchdog_task);
3600
3601         if (netdev->reg_state == NETREG_REGISTERED)
3602                 unregister_netdev(netdev);
3603
3604         ixgbevf_clear_interrupt_scheme(adapter);
3605         ixgbevf_reset_interrupt_capability(adapter);
3606
3607         iounmap(adapter->hw.hw_addr);
3608         pci_release_regions(pdev);
3609
3610         hw_dbg(&adapter->hw, "Remove complete\n");
3611
3612         kfree(adapter->tx_ring);
3613         kfree(adapter->rx_ring);
3614
3615         free_netdev(netdev);
3616
3617         pci_disable_device(pdev);
3618 }
3619
3620 /**
3621  * ixgbevf_io_error_detected - called when PCI error is detected
3622  * @pdev: Pointer to PCI device
3623  * @state: The current pci connection state
3624  *
3625  * This function is called after a PCI bus error affecting
3626  * this device has been detected.
3627  */
3628 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3629                                                   pci_channel_state_t state)
3630 {
3631         struct net_device *netdev = pci_get_drvdata(pdev);
3632         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3633
3634         netif_device_detach(netdev);
3635
3636         if (state == pci_channel_io_perm_failure)
3637                 return PCI_ERS_RESULT_DISCONNECT;
3638
3639         if (netif_running(netdev))
3640                 ixgbevf_down(adapter);
3641
3642         pci_disable_device(pdev);
3643
3644         /* Request a slot slot reset. */
3645         return PCI_ERS_RESULT_NEED_RESET;
3646 }
3647
3648 /**
3649  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3650  * @pdev: Pointer to PCI device
3651  *
3652  * Restart the card from scratch, as if from a cold-boot. Implementation
3653  * resembles the first-half of the ixgbevf_resume routine.
3654  */
3655 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3656 {
3657         struct net_device *netdev = pci_get_drvdata(pdev);
3658         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3659
3660         if (pci_enable_device_mem(pdev)) {
3661                 dev_err(&pdev->dev,
3662                         "Cannot re-enable PCI device after reset.\n");
3663                 return PCI_ERS_RESULT_DISCONNECT;
3664         }
3665
3666         pci_set_master(pdev);
3667
3668         ixgbevf_reset(adapter);
3669
3670         return PCI_ERS_RESULT_RECOVERED;
3671 }
3672
3673 /**
3674  * ixgbevf_io_resume - called when traffic can start flowing again.
3675  * @pdev: Pointer to PCI device
3676  *
3677  * This callback is called when the error recovery driver tells us that
3678  * its OK to resume normal operation. Implementation resembles the
3679  * second-half of the ixgbevf_resume routine.
3680  */
3681 static void ixgbevf_io_resume(struct pci_dev *pdev)
3682 {
3683         struct net_device *netdev = pci_get_drvdata(pdev);
3684         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3685
3686         if (netif_running(netdev))
3687                 ixgbevf_up(adapter);
3688
3689         netif_device_attach(netdev);
3690 }
3691
3692 /* PCI Error Recovery (ERS) */
3693 static const struct pci_error_handlers ixgbevf_err_handler = {
3694         .error_detected = ixgbevf_io_error_detected,
3695         .slot_reset = ixgbevf_io_slot_reset,
3696         .resume = ixgbevf_io_resume,
3697 };
3698
3699 static struct pci_driver ixgbevf_driver = {
3700         .name     = ixgbevf_driver_name,
3701         .id_table = ixgbevf_pci_tbl,
3702         .probe    = ixgbevf_probe,
3703         .remove   = ixgbevf_remove,
3704 #ifdef CONFIG_PM
3705         /* Power Management Hooks */
3706         .suspend  = ixgbevf_suspend,
3707         .resume   = ixgbevf_resume,
3708 #endif
3709         .shutdown = ixgbevf_shutdown,
3710         .err_handler = &ixgbevf_err_handler
3711 };
3712
3713 /**
3714  * ixgbevf_init_module - Driver Registration Routine
3715  *
3716  * ixgbevf_init_module is the first routine called when the driver is
3717  * loaded. All it does is register with the PCI subsystem.
3718  **/
3719 static int __init ixgbevf_init_module(void)
3720 {
3721         int ret;
3722         pr_info("%s - version %s\n", ixgbevf_driver_string,
3723                 ixgbevf_driver_version);
3724
3725         pr_info("%s\n", ixgbevf_copyright);
3726
3727         ret = pci_register_driver(&ixgbevf_driver);
3728         return ret;
3729 }
3730
3731 module_init(ixgbevf_init_module);
3732
3733 /**
3734  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3735  *
3736  * ixgbevf_exit_module is called just before the driver is removed
3737  * from memory.
3738  **/
3739 static void __exit ixgbevf_exit_module(void)
3740 {
3741         pci_unregister_driver(&ixgbevf_driver);
3742 }
3743
3744 #ifdef DEBUG
3745 /**
3746  * ixgbevf_get_hw_dev_name - return device name string
3747  * used by hardware layer to print debugging information
3748  **/
3749 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3750 {
3751         struct ixgbevf_adapter *adapter = hw->back;
3752         return adapter->netdev->name;
3753 }
3754
3755 #endif
3756 module_exit(ixgbevf_exit_module);
3757
3758 /* ixgbevf_main.c */