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   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2010 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 #include <linux/types.h>
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/string.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/tcp.h>
  37 #include <linux/pkt_sched.h>
  38 #include <linux/ipv6.h>
  39 #include <net/checksum.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/if_vlan.h>
  43 #include <scsi/fc/fc_fcoe.h>
  44
  45 #include "ixgbe.h"
  46 #include "ixgbe_common.h"
  47 #include "ixgbe_dcb_82599.h"
  48 #include "ixgbe_sriov.h"
  49
  50 char ixgbe_driver_name[] = "ixgbe";
  51 static const char ixgbe_driver_string[] =
  52                               "Intel(R) 10 Gigabit PCI Express Network Driver";
  53
  54 #define DRV_VERSION "2.0.62-k2"
  55 const char ixgbe_driver_version[] = DRV_VERSION;
  56 static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
  57
  58 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  59         [board_82598] = &ixgbe_82598_info,
  60         [board_82599] = &ixgbe_82599_info,
  61 };
  62
  63 /* ixgbe_pci_tbl - PCI Device ID Table
  64  *
  65  * Wildcard entries (PCI_ANY_ID) should come last
  66  * Last entry must be all 0s
  67  *
  68  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  69  *   Class, Class Mask, private data (not used) }
  70  */
  71 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
  72         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
  73          board_82598 },
  74         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  75          board_82598 },
  76         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  77          board_82598 },
  78         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
  79          board_82598 },
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
  81          board_82598 },
  82         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  83          board_82598 },
  84         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
  85          board_82598 },
  86         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
  87          board_82598 },
  88         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
  89          board_82598 },
  90         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
  91          board_82598 },
  92         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
  93          board_82598 },
  94         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
  95          board_82598 },
  96         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
  97          board_82599 },
  98         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
  99          board_82599 },
 100         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
 101          board_82599 },
 102         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
 103          board_82599 },
 104         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
 105          board_82599 },
 106         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
 107          board_82599 },
 108         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
 109          board_82599 },
 110         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
 111          board_82599 },
 112
 113         /* required last entry */
 114         {0, }
 115 };
 116 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
 117
 118 #ifdef CONFIG_IXGBE_DCA
 119 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
 120                             void *p);
 121 static struct notifier_block dca_notifier = {
 122         .notifier_call = ixgbe_notify_dca,
 123         .next          = NULL,
 124         .priority      = 0
 125 };
 126 #endif
 127
 128 #ifdef CONFIG_PCI_IOV
 129 static unsigned int max_vfs;
 130 module_param(max_vfs, uint, 0);
 131 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
 132                  "per physical function");
 133 #endif /* CONFIG_PCI_IOV */
 134
 135 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 136 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 137 MODULE_LICENSE("GPL");
 138 MODULE_VERSION(DRV_VERSION);
 139
 140 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 141
 142 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
 143 {
 144         struct ixgbe_hw *hw = &adapter->hw;
 145         u32 gcr;
 146         u32 gpie;
 147         u32 vmdctl;
 148
 149 #ifdef CONFIG_PCI_IOV
 150         /* disable iov and allow time for transactions to clear */
 151         pci_disable_sriov(adapter->pdev);
 152 #endif
 153
 154         /* turn off device IOV mode */
 155         gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
 156         gcr &= ~(IXGBE_GCR_EXT_SRIOV);
 157         IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
 158         gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
 159         gpie &= ~IXGBE_GPIE_VTMODE_MASK;
 160         IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
 161
 162         /* set default pool back to 0 */
 163         vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
 164         vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
 165         IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
 166
 167         /* take a breather then clean up driver data */
 168         msleep(100);
 169         if (adapter->vfinfo)
 170                 kfree(adapter->vfinfo);
 171         adapter->vfinfo = NULL;
 172
 173         adapter->num_vfs = 0;
 174         adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
 175 }
 176
 177 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 178 {
 179         u32 ctrl_ext;
 180
 181         /* Let firmware take over control of h/w */
 182         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 183         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 184                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 185 }
 186
 187 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 188 {
 189         u32 ctrl_ext;
 190
 191         /* Let firmware know the driver has taken over */
 192         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 193         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 194                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 195 }
 196
 197 /*
 198  * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 199  * @adapter: pointer to adapter struct
 200  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 201  * @queue: queue to map the corresponding interrupt to
 202  * @msix_vector: the vector to map to the corresponding queue
 203  *
 204  */
 205 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
 206                            u8 queue, u8 msix_vector)
 207 {
 208         u32 ivar, index;
 209         struct ixgbe_hw *hw = &adapter->hw;
 210         switch (hw->mac.type) {
 211         case ixgbe_mac_82598EB:
 212                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 213                 if (direction == -1)
 214                         direction = 0;
 215                 index = (((direction * 64) + queue) >> 2) & 0x1F;
 216                 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
 217                 ivar &= ~(0xFF << (8 * (queue & 0x3)));
 218                 ivar |= (msix_vector << (8 * (queue & 0x3)));
 219                 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
 220                 break;
 221         case ixgbe_mac_82599EB:
 222                 if (direction == -1) {
 223                         /* other causes */
 224                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 225                         index = ((queue & 1) * 8);
 226                         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
 227                         ivar &= ~(0xFF << index);
 228                         ivar |= (msix_vector << index);
 229                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
 230                         break;
 231                 } else {
 232                         /* tx or rx causes */
 233                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 234                         index = ((16 * (queue & 1)) + (8 * direction));
 235                         ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
 236                         ivar &= ~(0xFF << index);
 237                         ivar |= (msix_vector << index);
 238                         IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
 239                         break;
 240                 }
 241         default:
 242                 break;
 243         }
 244 }
 245
 246 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
 247                                           u64 qmask)
 248 {
 249         u32 mask;
 250
 251         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 252                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
 253                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
 254         } else {
 255                 mask = (qmask & 0xFFFFFFFF);
 256                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
 257                 mask = (qmask >> 32);
 258                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
 259         }
 260 }
 261
 262 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 263                                              struct ixgbe_tx_buffer
 264                                              *tx_buffer_info)
 265 {
 266         if (tx_buffer_info->dma) {
 267                 if (tx_buffer_info->mapped_as_page)
 268                         pci_unmap_page(adapter->pdev,
 269                                        tx_buffer_info->dma,
 270                                        tx_buffer_info->length,
 271                                        PCI_DMA_TODEVICE);
 272                 else
 273                         pci_unmap_single(adapter->pdev,
 274                                          tx_buffer_info->dma,
 275                                          tx_buffer_info->length,
 276                                          PCI_DMA_TODEVICE);
 277                 tx_buffer_info->dma = 0;
 278         }
 279         if (tx_buffer_info->skb) {
 280                 dev_kfree_skb_any(tx_buffer_info->skb);
 281                 tx_buffer_info->skb = NULL;
 282         }
 283         tx_buffer_info->time_stamp = 0;
 284         /* tx_buffer_info must be completely set up in the transmit path */
 285 }
 286
 287 /**
 288  * ixgbe_tx_is_paused - check if the tx ring is paused
 289  * @adapter: the ixgbe adapter
 290  * @tx_ring: the corresponding tx_ring
 291  *
 292  * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
 293  * corresponding TC of this tx_ring when checking TFCS.
 294  *
 295  * Returns : true if paused
 296  */
 297 static inline bool ixgbe_tx_is_paused(struct ixgbe_adapter *adapter,
 298                                       struct ixgbe_ring *tx_ring)
 299 {
 300         u32 txoff = IXGBE_TFCS_TXOFF;
 301
 302 #ifdef CONFIG_IXGBE_DCB
 303         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 304                 int tc;
 305                 int reg_idx = tx_ring->reg_idx;
 306                 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
 307
 308                 switch (adapter->hw.mac.type) {
 309                 case ixgbe_mac_82598EB:
 310                         tc = reg_idx >> 2;
 311                         txoff = IXGBE_TFCS_TXOFF0;
 312                         break;
 313                 case ixgbe_mac_82599EB:
 314                         tc = 0;
 315                         txoff = IXGBE_TFCS_TXOFF;
 316                         if (dcb_i == 8) {
 317                                 /* TC0, TC1 */
 318                                 tc = reg_idx >> 5;
 319                                 if (tc == 2) /* TC2, TC3 */
 320                                         tc += (reg_idx - 64) >> 4;
 321                                 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
 322                                         tc += 1 + ((reg_idx - 96) >> 3);
 323                         } else if (dcb_i == 4) {
 324                                 /* TC0, TC1 */
 325                                 tc = reg_idx >> 6;
 326                                 if (tc == 1) {
 327                                         tc += (reg_idx - 64) >> 5;
 328                                         if (tc == 2) /* TC2, TC3 */
 329                                                 tc += (reg_idx - 96) >> 4;
 330                                 }
 331                         }
 332                         break;
 333                 default:
 334                         tc = 0;
 335                 }
 336                 txoff <<= tc;
 337         }
 338 #endif
 339         return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
 340 }
 341
 342 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 343                                        struct ixgbe_ring *tx_ring,
 344                                        unsigned int eop)
 345 {
 346         struct ixgbe_hw *hw = &adapter->hw;
 347
 348         /* Detect a transmit hang in hardware, this serializes the
 349          * check with the clearing of time_stamp and movement of eop */
 350         adapter->detect_tx_hung = false;
 351         if (tx_ring->tx_buffer_info[eop].time_stamp &&
 352             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 353             !ixgbe_tx_is_paused(adapter, tx_ring)) {
 354                 /* detected Tx unit hang */
 355                 union ixgbe_adv_tx_desc *tx_desc;
 356                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 357                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 358                         "  Tx Queue             <%d>\n"
 359                         "  TDH, TDT             <%x>, <%x>\n"
 360                         "  next_to_use          <%x>\n"
 361                         "  next_to_clean        <%x>\n"
 362                         "tx_buffer_info[next_to_clean]\n"
 363                         "  time_stamp           <%lx>\n"
 364                         "  jiffies              <%lx>\n",
 365                         tx_ring->queue_index,
 366                         IXGBE_READ_REG(hw, tx_ring->head),
 367                         IXGBE_READ_REG(hw, tx_ring->tail),
 368                         tx_ring->next_to_use, eop,
 369                         tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
 370                 return true;
 371         }
 372
 373         return false;
 374 }
 375
 376 #define IXGBE_MAX_TXD_PWR       14
 377 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 378
 379 /* Tx Descriptors needed, worst case */
 380 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 381                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 382 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 383         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
 384
 385 static void ixgbe_tx_timeout(struct net_device *netdev);
 386
 387 /**
 388  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 389  * @q_vector: structure containing interrupt and ring information
 390  * @tx_ring: tx ring to clean
 391  **/
 392 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 393                                struct ixgbe_ring *tx_ring)
 394 {
 395         struct ixgbe_adapter *adapter = q_vector->adapter;
 396         struct net_device *netdev = adapter->netdev;
 397         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 398         struct ixgbe_tx_buffer *tx_buffer_info;
 399         unsigned int i, eop, count = 0;
 400         unsigned int total_bytes = 0, total_packets = 0;
 401
 402         i = tx_ring->next_to_clean;
 403         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 404         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 405
 406         while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
 407                (count < tx_ring->work_limit)) {
 408                 bool cleaned = false;
 409                 for ( ; !cleaned; count++) {
 410                         struct sk_buff *skb;
 411                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 412                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 413                         cleaned = (i == eop);
 414                         skb = tx_buffer_info->skb;
 415
 416                         if (cleaned && skb) {
 417                                 unsigned int segs, bytecount;
 418                                 unsigned int hlen = skb_headlen(skb);
 419
 420                                 /* gso_segs is currently only valid for tcp */
 421                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 422 #ifdef IXGBE_FCOE
 423                                 /* adjust for FCoE Sequence Offload */
 424                                 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
 425                                     && (skb->protocol == htons(ETH_P_FCOE)) &&
 426                                     skb_is_gso(skb)) {
 427                                         hlen = skb_transport_offset(skb) +
 428                                                 sizeof(struct fc_frame_header) +
 429                                                 sizeof(struct fcoe_crc_eof);
 430                                         segs = DIV_ROUND_UP(skb->len - hlen,
 431                                                 skb_shinfo(skb)->gso_size);
 432                                 }
 433 #endif /* IXGBE_FCOE */
 434                                 /* multiply data chunks by size of headers */
 435                                 bytecount = ((segs - 1) * hlen) + skb->len;
 436                                 total_packets += segs;
 437                                 total_bytes += bytecount;
 438                         }
 439
 440                         ixgbe_unmap_and_free_tx_resource(adapter,
 441                                                          tx_buffer_info);
 442
 443                         tx_desc->wb.status = 0;
 444
 445                         i++;
 446                         if (i == tx_ring->count)
 447                                 i = 0;
 448                 }
 449
 450                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 451                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 452         }
 453
 454         tx_ring->next_to_clean = i;
 455
 456 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 457         if (unlikely(count && netif_carrier_ok(netdev) &&
 458                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 459                 /* Make sure that anybody stopping the queue after this
 460                  * sees the new next_to_clean.
 461                  */
 462                 smp_mb();
 463                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 464                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 465                         netif_wake_subqueue(netdev, tx_ring->queue_index);
 466                         ++tx_ring->restart_queue;
 467                 }
 468         }
 469
 470         if (adapter->detect_tx_hung) {
 471                 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
 472                         /* schedule immediate reset if we believe we hung */
 473                         DPRINTK(PROBE, INFO,
 474                                 "tx hang %d detected, resetting adapter\n",
 475                                 adapter->tx_timeout_count + 1);
 476                         ixgbe_tx_timeout(adapter->netdev);
 477                 }
 478         }
 479
 480         /* re-arm the interrupt */
 481         if (count >= tx_ring->work_limit)
 482                 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
 483
 484         tx_ring->total_bytes += total_bytes;
 485         tx_ring->total_packets += total_packets;
 486         tx_ring->stats.packets += total_packets;
 487         tx_ring->stats.bytes += total_bytes;
 488         return (count < tx_ring->work_limit);
 489 }
 490
 491 #ifdef CONFIG_IXGBE_DCA
 492 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
 493                                 struct ixgbe_ring *rx_ring)
 494 {
 495         u32 rxctrl;
 496         int cpu = get_cpu();
 497         int q = rx_ring->reg_idx;
 498
 499         if (rx_ring->cpu != cpu) {
 500                 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
 501                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 502                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 503                         rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 504                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 505                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
 506                         rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 507                                    IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
 508                 }
 509                 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 510                 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 511                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
 512                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
 513                             IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
 514                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
 515                 rx_ring->cpu = cpu;
 516         }
 517         put_cpu();
 518 }
 519
 520 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 521                                 struct ixgbe_ring *tx_ring)
 522 {
 523         u32 txctrl;
 524         int cpu = get_cpu();
 525         int q = tx_ring->reg_idx;
 526         struct ixgbe_hw *hw = &adapter->hw;
 527
 528         if (tx_ring->cpu != cpu) {
 529                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 530                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
 531                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 532                         txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 533                         txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 534                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
 535                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 536                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
 537                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
 538                         txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 539                                   IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
 540                         txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 541                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
 542                 }
 543                 tx_ring->cpu = cpu;
 544         }
 545         put_cpu();
 546 }
 547
 548 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
 549 {
 550         int i;
 551
 552         if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
 553                 return;
 554
 555         /* always use CB2 mode, difference is masked in the CB driver */
 556         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
 557
 558         for (i = 0; i < adapter->num_tx_queues; i++) {
 559                 adapter->tx_ring[i]->cpu = -1;
 560                 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
 561         }
 562         for (i = 0; i < adapter->num_rx_queues; i++) {
 563                 adapter->rx_ring[i]->cpu = -1;
 564                 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
 565         }
 566 }
 567
 568 static int __ixgbe_notify_dca(struct device *dev, void *data)
 569 {
 570         struct net_device *netdev = dev_get_drvdata(dev);
 571         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 572         unsigned long event = *(unsigned long *)data;
 573
 574         switch (event) {
 575         case DCA_PROVIDER_ADD:
 576                 /* if we're already enabled, don't do it again */
 577                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 578                         break;
 579                 if (dca_add_requester(dev) == 0) {
 580                         adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
 581                         ixgbe_setup_dca(adapter);
 582                         break;
 583                 }
 584                 /* Fall Through since DCA is disabled. */
 585         case DCA_PROVIDER_REMOVE:
 586                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
 587                         dca_remove_requester(dev);
 588                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
 589                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
 590                 }
 591                 break;
 592         }
 593
 594         return 0;
 595 }
 596
 597 #endif /* CONFIG_IXGBE_DCA */
 598 /**
 599  * ixgbe_receive_skb - Send a completed packet up the stack
 600  * @adapter: board private structure
 601  * @skb: packet to send up
 602  * @status: hardware indication of status of receive
 603  * @rx_ring: rx descriptor ring (for a specific queue) to setup
 604  * @rx_desc: rx descriptor
 605  **/
 606 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
 607                               struct sk_buff *skb, u8 status,
 608                               struct ixgbe_ring *ring,
 609                               union ixgbe_adv_rx_desc *rx_desc)
 610 {
 611         struct ixgbe_adapter *adapter = q_vector->adapter;
 612         struct napi_struct *napi = &q_vector->napi;
 613         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 614         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 615
 616         skb_record_rx_queue(skb, ring->queue_index);
 617         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 618                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 619                         vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
 620                 else
 621                         napi_gro_receive(napi, skb);
 622         } else {
 623                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 624                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 625                 else
 626                         netif_rx(skb);
 627         }
 628 }
 629
 630 /**
 631  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 632  * @adapter: address of board private structure
 633  * @status_err: hardware indication of status of receive
 634  * @skb: skb currently being received and modified
 635  **/
 636 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 637                                      union ixgbe_adv_rx_desc *rx_desc,
 638                                      struct sk_buff *skb)
 639 {
 640         u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
 641
 642         skb->ip_summed = CHECKSUM_NONE;
 643
 644         /* Rx csum disabled */
 645         if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 646                 return;
 647
 648         /* if IP and error */
 649         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 650             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 651                 adapter->hw_csum_rx_error++;
 652                 return;
 653         }
 654
 655         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 656                 return;
 657
 658         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 659                 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
 660
 661                 /*
 662                  * 82599 errata, UDP frames with a 0 checksum can be marked as
 663                  * checksum errors.
 664                  */
 665                 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
 666                     (adapter->hw.mac.type == ixgbe_mac_82599EB))
 667                         return;
 668
 669                 adapter->hw_csum_rx_error++;
 670                 return;
 671         }
 672
 673         /* It must be a TCP or UDP packet with a valid checksum */
 674         skb->ip_summed = CHECKSUM_UNNECESSARY;
 675 }
 676
 677 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
 678                                          struct ixgbe_ring *rx_ring, u32 val)
 679 {
 680         /*
 681          * Force memory writes to complete before letting h/w
 682          * know there are new descriptors to fetch.  (Only
 683          * applicable for weak-ordered memory model archs,
 684          * such as IA-64).
 685          */
 686         wmb();
 687         IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
 688 }
 689
 690 /**
 691  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 692  * @adapter: address of board private structure
 693  **/
 694 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 695                                    struct ixgbe_ring *rx_ring,
 696                                    int cleaned_count)
 697 {
 698         struct pci_dev *pdev = adapter->pdev;
 699         union ixgbe_adv_rx_desc *rx_desc;
 700         struct ixgbe_rx_buffer *bi;
 701         unsigned int i;
 702
 703         i = rx_ring->next_to_use;
 704         bi = &rx_ring->rx_buffer_info[i];
 705
 706         while (cleaned_count--) {
 707                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 708
 709                 if (!bi->page_dma &&
 710                     (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
 711                         if (!bi->page) {
 712                                 bi->page = alloc_page(GFP_ATOMIC);
 713                                 if (!bi->page) {
 714                                         adapter->alloc_rx_page_failed++;
 715                                         goto no_buffers;
 716                                 }
 717                                 bi->page_offset = 0;
 718                         } else {
 719                                 /* use a half page if we're re-using */
 720                                 bi->page_offset ^= (PAGE_SIZE / 2);
 721                         }
 722
 723                         bi->page_dma = pci_map_page(pdev, bi->page,
 724                                                     bi->page_offset,
 725                                                     (PAGE_SIZE / 2),
 726                                                     PCI_DMA_FROMDEVICE);
 727                 }
 728
 729                 if (!bi->skb) {
 730                         struct sk_buff *skb;
 731                         /* netdev_alloc_skb reserves 32 bytes up front!! */
 732                         uint bufsz = rx_ring->rx_buf_len + SMP_CACHE_BYTES;
 733                         skb = netdev_alloc_skb(adapter->netdev, bufsz);
 734
 735                         if (!skb) {
 736                                 adapter->alloc_rx_buff_failed++;
 737                                 goto no_buffers;
 738                         }
 739
 740                         /* advance the data pointer to the next cache line */
 741                         skb_reserve(skb, (PTR_ALIGN(skb->data, SMP_CACHE_BYTES)
 742                                           - skb->data));
 743
 744                         bi->skb = skb;
 745                         bi->dma = pci_map_single(pdev, skb->data,
 746                                                  rx_ring->rx_buf_len,
 747                                                  PCI_DMA_FROMDEVICE);
 748                 }
 749                 /* Refresh the desc even if buffer_addrs didn't change because
 750                  * each write-back erases this info. */
 751                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 752                         rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
 753                         rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
 754                 } else {
 755                         rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 756                 }
 757
 758                 i++;
 759                 if (i == rx_ring->count)
 760                         i = 0;
 761                 bi = &rx_ring->rx_buffer_info[i];
 762         }
 763
 764 no_buffers:
 765         if (rx_ring->next_to_use != i) {
 766                 rx_ring->next_to_use = i;
 767                 if (i-- == 0)
 768                         i = (rx_ring->count - 1);
 769
 770                 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
 771         }
 772 }
 773
 774 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
 775 {
 776         return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
 777 }
 778
 779 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
 780 {
 781         return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
 782 }
 783
 784 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
 785 {
 786         return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
 787                 IXGBE_RXDADV_RSCCNT_MASK) >>
 788                 IXGBE_RXDADV_RSCCNT_SHIFT;
 789 }
 790
 791 /**
 792  * ixgbe_transform_rsc_queue - change rsc queue into a full packet
 793  * @skb: pointer to the last skb in the rsc queue
 794  * @count: pointer to number of packets coalesced in this context
 795  *
 796  * This function changes a queue full of hw rsc buffers into a completed
 797  * packet.  It uses the ->prev pointers to find the first packet and then
 798  * turns it into the frag list owner.
 799  **/
 800 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
 801                                                         u64 *count)
 802 {
 803         unsigned int frag_list_size = 0;
 804
 805         while (skb->prev) {
 806                 struct sk_buff *prev = skb->prev;
 807                 frag_list_size += skb->len;
 808                 skb->prev = NULL;
 809                 skb = prev;
 810                 *count += 1;
 811         }
 812
 813         skb_shinfo(skb)->frag_list = skb->next;
 814         skb->next = NULL;
 815         skb->len += frag_list_size;
 816         skb->data_len += frag_list_size;
 817         skb->truesize += frag_list_size;
 818         return skb;
 819 }
 820
 821 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
 822                                struct ixgbe_ring *rx_ring,
 823                                int *work_done, int work_to_do)
 824 {
 825         struct ixgbe_adapter *adapter = q_vector->adapter;
 826         struct net_device *netdev = adapter->netdev;
 827         struct pci_dev *pdev = adapter->pdev;
 828         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 829         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 830         struct sk_buff *skb;
 831         unsigned int i, rsc_count = 0;
 832         u32 len, staterr;
 833         u16 hdr_info;
 834         bool cleaned = false;
 835         int cleaned_count = 0;
 836         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 837 #ifdef IXGBE_FCOE
 838         int ddp_bytes = 0;
 839 #endif /* IXGBE_FCOE */
 840
 841         i = rx_ring->next_to_clean;
 842         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 843         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 844         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 845
 846         while (staterr & IXGBE_RXD_STAT_DD) {
 847                 u32 upper_len = 0;
 848                 if (*work_done >= work_to_do)
 849                         break;
 850                 (*work_done)++;
 851
 852                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 853                         hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
 854                         len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 855                                IXGBE_RXDADV_HDRBUFLEN_SHIFT;
 856                         if (len > IXGBE_RX_HDR_SIZE)
 857                                 len = IXGBE_RX_HDR_SIZE;
 858                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 859                 } else {
 860                         len = le16_to_cpu(rx_desc->wb.upper.length);
 861                 }
 862
 863                 cleaned = true;
 864                 skb = rx_buffer_info->skb;
 865                 prefetch(skb->data);
 866                 rx_buffer_info->skb = NULL;
 867
 868                 if (rx_buffer_info->dma) {
 869                         pci_unmap_single(pdev, rx_buffer_info->dma,
 870                                          rx_ring->rx_buf_len,
 871                                          PCI_DMA_FROMDEVICE);
 872                         rx_buffer_info->dma = 0;
 873                         skb_put(skb, len);
 874                 }
 875
 876                 if (upper_len) {
 877                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 878                                        PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
 879                         rx_buffer_info->page_dma = 0;
 880                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 881                                            rx_buffer_info->page,
 882                                            rx_buffer_info->page_offset,
 883                                            upper_len);
 884
 885                         if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
 886                             (page_count(rx_buffer_info->page) != 1))
 887                                 rx_buffer_info->page = NULL;
 888                         else
 889                                 get_page(rx_buffer_info->page);
 890
 891                         skb->len += upper_len;
 892                         skb->data_len += upper_len;
 893                         skb->truesize += upper_len;
 894                 }
 895
 896                 i++;
 897                 if (i == rx_ring->count)
 898                         i = 0;
 899
 900                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 901                 prefetch(next_rxd);
 902                 cleaned_count++;
 903
 904                 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
 905                         rsc_count = ixgbe_get_rsc_count(rx_desc);
 906
 907                 if (rsc_count) {
 908                         u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
 909                                      IXGBE_RXDADV_NEXTP_SHIFT;
 910                         next_buffer = &rx_ring->rx_buffer_info[nextp];
 911                 } else {
 912                         next_buffer = &rx_ring->rx_buffer_info[i];
 913                 }
 914
 915                 if (staterr & IXGBE_RXD_STAT_EOP) {
 916                         if (skb->prev)
 917                                 skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count));
 918                         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
 919                                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
 920                                         rx_ring->rsc_count += skb_shinfo(skb)->nr_frags;
 921                                 else
 922                                         rx_ring->rsc_count++;
 923                                 rx_ring->rsc_flush++;
 924                         }
 925                         rx_ring->stats.packets++;
 926                         rx_ring->stats.bytes += skb->len;
 927                 } else {
 928                         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 929                                 rx_buffer_info->skb = next_buffer->skb;
 930                                 rx_buffer_info->dma = next_buffer->dma;
 931                                 next_buffer->skb = skb;
 932                                 next_buffer->dma = 0;
 933                         } else {
 934                                 skb->next = next_buffer->skb;
 935                                 skb->next->prev = skb;
 936                         }
 937                         rx_ring->non_eop_descs++;
 938                         goto next_desc;
 939                 }
 940
 941                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 942                         dev_kfree_skb_irq(skb);
 943                         goto next_desc;
 944                 }
 945
 946                 ixgbe_rx_checksum(adapter, rx_desc, skb);
 947
 948                 /* probably a little skewed due to removing CRC */
 949                 total_rx_bytes += skb->len;
 950                 total_rx_packets++;
 951
 952                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 953 #ifdef IXGBE_FCOE
 954                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
 955                 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
 956                         ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
 957                         if (!ddp_bytes)
 958                                 goto next_desc;
 959                 }
 960 #endif /* IXGBE_FCOE */
 961                 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
 962
 963 next_desc:
 964                 rx_desc->wb.upper.status_error = 0;
 965
 966                 /* return some buffers to hardware, one at a time is too slow */
 967                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 968                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 969                         cleaned_count = 0;
 970                 }
 971
 972                 /* use prefetched values */
 973                 rx_desc = next_rxd;
 974                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 975
 976                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 977         }
 978
 979         rx_ring->next_to_clean = i;
 980         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 981
 982         if (cleaned_count)
 983                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 984
 985 #ifdef IXGBE_FCOE
 986         /* include DDPed FCoE data */
 987         if (ddp_bytes > 0) {
 988                 unsigned int mss;
 989
 990                 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
 991                         sizeof(struct fc_frame_header) -
 992                         sizeof(struct fcoe_crc_eof);
 993                 if (mss > 512)
 994                         mss &= ~511;
 995                 total_rx_bytes += ddp_bytes;
 996                 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
 997         }
 998 #endif /* IXGBE_FCOE */
 999
1000         rx_ring->total_packets += total_rx_packets;
1001         rx_ring->total_bytes += total_rx_bytes;
1002         netdev->stats.rx_bytes += total_rx_bytes;
1003         netdev->stats.rx_packets += total_rx_packets;
1004
1005         return cleaned;
1006 }
1007
1008 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1009 /**
1010  * ixgbe_configure_msix - Configure MSI-X hardware
1011  * @adapter: board private structure
1012  *
1013  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1014  * interrupts.
1015  **/
1016 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1017 {
1018         struct ixgbe_q_vector *q_vector;
1019         int i, j, q_vectors, v_idx, r_idx;
1020         u32 mask;
1021
1022         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1023
1024         /*
1025          * Populate the IVAR table and set the ITR values to the
1026          * corresponding register.
1027          */
1028         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1029                 q_vector = adapter->q_vector[v_idx];
1030                 /* XXX for_each_bit(...) */
1031                 r_idx = find_first_bit(q_vector->rxr_idx,
1032                                        adapter->num_rx_queues);
1033
1034                 for (i = 0; i < q_vector->rxr_count; i++) {
1035                         j = adapter->rx_ring[r_idx]->reg_idx;
1036                         ixgbe_set_ivar(adapter, 0, j, v_idx);
1037                         r_idx = find_next_bit(q_vector->rxr_idx,
1038                                               adapter->num_rx_queues,
1039                                               r_idx + 1);
1040                 }
1041                 r_idx = find_first_bit(q_vector->txr_idx,
1042                                        adapter->num_tx_queues);
1043
1044                 for (i = 0; i < q_vector->txr_count; i++) {
1045                         j = adapter->tx_ring[r_idx]->reg_idx;
1046                         ixgbe_set_ivar(adapter, 1, j, v_idx);
1047                         r_idx = find_next_bit(q_vector->txr_idx,
1048                                               adapter->num_tx_queues,
1049                                               r_idx + 1);
1050                 }
1051
1052                 if (q_vector->txr_count && !q_vector->rxr_count)
1053                         /* tx only */
1054                         q_vector->eitr = adapter->tx_eitr_param;
1055                 else if (q_vector->rxr_count)
1056                         /* rx or mixed */
1057                         q_vector->eitr = adapter->rx_eitr_param;
1058
1059                 ixgbe_write_eitr(q_vector);
1060         }
1061
1062         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1063                 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1064                                v_idx);
1065         else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1066                 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1067         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1068
1069         /* set up to autoclear timer, and the vectors */
1070         mask = IXGBE_EIMS_ENABLE_MASK;
1071         if (adapter->num_vfs)
1072                 mask &= ~(IXGBE_EIMS_OTHER |
1073                           IXGBE_EIMS_MAILBOX |
1074                           IXGBE_EIMS_LSC);
1075         else
1076                 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1077         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1078 }
1079
1080 enum latency_range {
1081         lowest_latency = 0,
1082         low_latency = 1,
1083         bulk_latency = 2,
1084         latency_invalid = 255
1085 };
1086
1087 /**
1088  * ixgbe_update_itr - update the dynamic ITR value based on statistics
1089  * @adapter: pointer to adapter
1090  * @eitr: eitr setting (ints per sec) to give last timeslice
1091  * @itr_setting: current throttle rate in ints/second
1092  * @packets: the number of packets during this measurement interval
1093  * @bytes: the number of bytes during this measurement interval
1094  *
1095  *      Stores a new ITR value based on packets and byte
1096  *      counts during the last interrupt.  The advantage of per interrupt
1097  *      computation is faster updates and more accurate ITR for the current
1098  *      traffic pattern.  Constants in this function were computed
1099  *      based on theoretical maximum wire speed and thresholds were set based
1100  *      on testing data as well as attempting to minimize response time
1101  *      while increasing bulk throughput.
1102  *      this functionality is controlled by the InterruptThrottleRate module
1103  *      parameter (see ixgbe_param.c)
1104  **/
1105 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1106                            u32 eitr, u8 itr_setting,
1107                            int packets, int bytes)
1108 {
1109         unsigned int retval = itr_setting;
1110         u32 timepassed_us;
1111         u64 bytes_perint;
1112
1113         if (packets == 0)
1114                 goto update_itr_done;
1115
1116
1117         /* simple throttlerate management
1118          *    0-20MB/s lowest (100000 ints/s)
1119          *   20-100MB/s low   (20000 ints/s)
1120          *  100-1249MB/s bulk (8000 ints/s)
1121          */
1122         /* what was last interrupt timeslice? */
1123         timepassed_us = 1000000/eitr;
1124         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1125
1126         switch (itr_setting) {
1127         case lowest_latency:
1128                 if (bytes_perint > adapter->eitr_low)
1129                         retval = low_latency;
1130                 break;
1131         case low_latency:
1132                 if (bytes_perint > adapter->eitr_high)
1133                         retval = bulk_latency;
1134                 else if (bytes_perint <= adapter->eitr_low)
1135                         retval = lowest_latency;
1136                 break;
1137         case bulk_latency:
1138                 if (bytes_perint <= adapter->eitr_high)
1139                         retval = low_latency;
1140                 break;
1141         }
1142
1143 update_itr_done:
1144         return retval;
1145 }
1146
1147 /**
1148  * ixgbe_write_eitr - write EITR register in hardware specific way
1149  * @q_vector: structure containing interrupt and ring information
1150  *
1151  * This function is made to be called by ethtool and by the driver
1152  * when it needs to update EITR registers at runtime.  Hardware
1153  * specific quirks/differences are taken care of here.
1154  */
1155 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1156 {
1157         struct ixgbe_adapter *adapter = q_vector->adapter;
1158         struct ixgbe_hw *hw = &adapter->hw;
1159         int v_idx = q_vector->v_idx;
1160         u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1161
1162         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1163                 /* must write high and low 16 bits to reset counter */
1164                 itr_reg |= (itr_reg << 16);
1165         } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1166                 /*
1167                  * set the WDIS bit to not clear the timer bits and cause an
1168                  * immediate assertion of the interrupt
1169                  */
1170                 itr_reg |= IXGBE_EITR_CNT_WDIS;
1171         }
1172         IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1173 }
1174
1175 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1176 {
1177         struct ixgbe_adapter *adapter = q_vector->adapter;
1178         u32 new_itr;
1179         u8 current_itr, ret_itr;
1180         int i, r_idx;
1181         struct ixgbe_ring *rx_ring, *tx_ring;
1182
1183         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1184         for (i = 0; i < q_vector->txr_count; i++) {
1185                 tx_ring = adapter->tx_ring[r_idx];
1186                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1187                                            q_vector->tx_itr,
1188                                            tx_ring->total_packets,
1189                                            tx_ring->total_bytes);
1190                 /* if the result for this queue would decrease interrupt
1191                  * rate for this vector then use that result */
1192                 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1193                                     q_vector->tx_itr - 1 : ret_itr);
1194                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1195                                       r_idx + 1);
1196         }
1197
1198         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1199         for (i = 0; i < q_vector->rxr_count; i++) {
1200                 rx_ring = adapter->rx_ring[r_idx];
1201                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1202                                            q_vector->rx_itr,
1203                                            rx_ring->total_packets,
1204                                            rx_ring->total_bytes);
1205                 /* if the result for this queue would decrease interrupt
1206                  * rate for this vector then use that result */
1207                 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1208                                     q_vector->rx_itr - 1 : ret_itr);
1209                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1210                                       r_idx + 1);
1211         }
1212
1213         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1214
1215         switch (current_itr) {
1216         /* counts and packets in update_itr are dependent on these numbers */
1217         case lowest_latency:
1218                 new_itr = 100000;
1219                 break;
1220         case low_latency:
1221                 new_itr = 20000; /* aka hwitr = ~200 */
1222                 break;
1223         case bulk_latency:
1224         default:
1225                 new_itr = 8000;
1226                 break;
1227         }
1228
1229         if (new_itr != q_vector->eitr) {
1230                 /* do an exponential smoothing */
1231                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1232
1233                 /* save the algorithm value here, not the smoothed one */
1234                 q_vector->eitr = new_itr;
1235
1236                 ixgbe_write_eitr(q_vector);
1237         }
1238
1239         return;
1240 }
1241
1242 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1243 {
1244         struct ixgbe_hw *hw = &adapter->hw;
1245
1246         if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1247             (eicr & IXGBE_EICR_GPI_SDP1)) {
1248                 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1249                 /* write to clear the interrupt */
1250                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1251         }
1252 }
1253
1254 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1255 {
1256         struct ixgbe_hw *hw = &adapter->hw;
1257
1258         if (eicr & IXGBE_EICR_GPI_SDP1) {
1259                 /* Clear the interrupt */
1260                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1261                 schedule_work(&adapter->multispeed_fiber_task);
1262         } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1263                 /* Clear the interrupt */
1264                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1265                 schedule_work(&adapter->sfp_config_module_task);
1266         } else {
1267                 /* Interrupt isn't for us... */
1268                 return;
1269         }
1270 }
1271
1272 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1273 {
1274         struct ixgbe_hw *hw = &adapter->hw;
1275
1276         adapter->lsc_int++;
1277         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1278         adapter->link_check_timeout = jiffies;
1279         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1280                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1281                 IXGBE_WRITE_FLUSH(hw);
1282                 schedule_work(&adapter->watchdog_task);
1283         }
1284 }
1285
1286 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1287 {
1288         struct net_device *netdev = data;
1289         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1290         struct ixgbe_hw *hw = &adapter->hw;
1291         u32 eicr;
1292
1293         /*
1294          * Workaround for Silicon errata.  Use clear-by-write instead
1295          * of clear-by-read.  Reading with EICS will return the
1296          * interrupt causes without clearing, which later be done
1297          * with the write to EICR.
1298          */
1299         eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1300         IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1301
1302         if (eicr & IXGBE_EICR_LSC)
1303                 ixgbe_check_lsc(adapter);
1304
1305         if (eicr & IXGBE_EICR_MAILBOX)
1306                 ixgbe_msg_task(adapter);
1307
1308         if (hw->mac.type == ixgbe_mac_82598EB)
1309                 ixgbe_check_fan_failure(adapter, eicr);
1310
1311         if (hw->mac.type == ixgbe_mac_82599EB) {
1312                 ixgbe_check_sfp_event(adapter, eicr);
1313
1314                 /* Handle Flow Director Full threshold interrupt */
1315                 if (eicr & IXGBE_EICR_FLOW_DIR) {
1316                         int i;
1317                         IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1318                         /* Disable transmits before FDIR Re-initialization */
1319                         netif_tx_stop_all_queues(netdev);
1320                         for (i = 0; i < adapter->num_tx_queues; i++) {
1321                                 struct ixgbe_ring *tx_ring =
1322                                                             adapter->tx_ring[i];
1323                                 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1324                                                        &tx_ring->reinit_state))
1325                                         schedule_work(&adapter->fdir_reinit_task);
1326                         }
1327                 }
1328         }
1329         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1330                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1331
1332         return IRQ_HANDLED;
1333 }
1334
1335 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1336                                            u64 qmask)
1337 {
1338         u32 mask;
1339
1340         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1341                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1342                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1343         } else {
1344                 mask = (qmask & 0xFFFFFFFF);
1345                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1346                 mask = (qmask >> 32);
1347                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1348         }
1349         /* skip the flush */
1350 }
1351
1352 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1353                                             u64 qmask)
1354 {
1355         u32 mask;
1356
1357         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1358                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1359                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1360         } else {
1361                 mask = (qmask & 0xFFFFFFFF);
1362                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1363                 mask = (qmask >> 32);
1364                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1365         }
1366         /* skip the flush */
1367 }
1368
1369 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1370 {
1371         struct ixgbe_q_vector *q_vector = data;
1372         struct ixgbe_adapter  *adapter = q_vector->adapter;
1373         struct ixgbe_ring     *tx_ring;
1374         int i, r_idx;
1375
1376         if (!q_vector->txr_count)
1377                 return IRQ_HANDLED;
1378
1379         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1380         for (i = 0; i < q_vector->txr_count; i++) {
1381                 tx_ring = adapter->tx_ring[r_idx];
1382                 tx_ring->total_bytes = 0;
1383                 tx_ring->total_packets = 0;
1384                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1385                                       r_idx + 1);
1386         }
1387
1388         /* EIAM disabled interrupts (on this vector) for us */
1389         napi_schedule(&q_vector->napi);
1390
1391         return IRQ_HANDLED;
1392 }
1393
1394 /**
1395  * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1396  * @irq: unused
1397  * @data: pointer to our q_vector struct for this interrupt vector
1398  **/
1399 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1400 {
1401         struct ixgbe_q_vector *q_vector = data;
1402         struct ixgbe_adapter  *adapter = q_vector->adapter;
1403         struct ixgbe_ring  *rx_ring;
1404         int r_idx;
1405         int i;
1406
1407         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1408         for (i = 0;  i < q_vector->rxr_count; i++) {
1409                 rx_ring = adapter->rx_ring[r_idx];
1410                 rx_ring->total_bytes = 0;
1411                 rx_ring->total_packets = 0;
1412                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1413                                       r_idx + 1);
1414         }
1415
1416         if (!q_vector->rxr_count)
1417                 return IRQ_HANDLED;
1418
1419         /* disable interrupts on this vector only */
1420         /* EIAM disabled interrupts (on this vector) for us */
1421         napi_schedule(&q_vector->napi);
1422
1423         return IRQ_HANDLED;
1424 }
1425
1426 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1427 {
1428         struct ixgbe_q_vector *q_vector = data;
1429         struct ixgbe_adapter  *adapter = q_vector->adapter;
1430         struct ixgbe_ring  *ring;
1431         int r_idx;
1432         int i;
1433
1434         if (!q_vector->txr_count && !q_vector->rxr_count)
1435                 return IRQ_HANDLED;
1436
1437         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1438         for (i = 0; i < q_vector->txr_count; i++) {
1439                 ring = adapter->tx_ring[r_idx];
1440                 ring->total_bytes = 0;
1441                 ring->total_packets = 0;
1442                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1443                                       r_idx + 1);
1444         }
1445
1446         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1447         for (i = 0; i < q_vector->rxr_count; i++) {
1448                 ring = adapter->rx_ring[r_idx];
1449                 ring->total_bytes = 0;
1450                 ring->total_packets = 0;
1451                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1452                                       r_idx + 1);
1453         }
1454
1455         /* EIAM disabled interrupts (on this vector) for us */
1456         napi_schedule(&q_vector->napi);
1457
1458         return IRQ_HANDLED;
1459 }
1460
1461 /**
1462  * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1463  * @napi: napi struct with our devices info in it
1464  * @budget: amount of work driver is allowed to do this pass, in packets
1465  *
1466  * This function is optimized for cleaning one queue only on a single
1467  * q_vector!!!
1468  **/
1469 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1470 {
1471         struct ixgbe_q_vector *q_vector =
1472                                container_of(napi, struct ixgbe_q_vector, napi);
1473         struct ixgbe_adapter *adapter = q_vector->adapter;
1474         struct ixgbe_ring *rx_ring = NULL;
1475         int work_done = 0;
1476         long r_idx;
1477
1478         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1479         rx_ring = adapter->rx_ring[r_idx];
1480 #ifdef CONFIG_IXGBE_DCA
1481         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1482                 ixgbe_update_rx_dca(adapter, rx_ring);
1483 #endif
1484
1485         ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1486
1487         /* If all Rx work done, exit the polling mode */
1488         if (work_done < budget) {
1489                 napi_complete(napi);
1490                 if (adapter->rx_itr_setting & 1)
1491                         ixgbe_set_itr_msix(q_vector);
1492                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1493                         ixgbe_irq_enable_queues(adapter,
1494                                                 ((u64)1 << q_vector->v_idx));
1495         }
1496
1497         return work_done;
1498 }
1499
1500 /**
1501  * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1502  * @napi: napi struct with our devices info in it
1503  * @budget: amount of work driver is allowed to do this pass, in packets
1504  *
1505  * This function will clean more than one rx queue associated with a
1506  * q_vector.
1507  **/
1508 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1509 {
1510         struct ixgbe_q_vector *q_vector =
1511                                container_of(napi, struct ixgbe_q_vector, napi);
1512         struct ixgbe_adapter *adapter = q_vector->adapter;
1513         struct ixgbe_ring *ring = NULL;
1514         int work_done = 0, i;
1515         long r_idx;
1516         bool tx_clean_complete = true;
1517
1518         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1519         for (i = 0; i < q_vector->txr_count; i++) {
1520                 ring = adapter->tx_ring[r_idx];
1521 #ifdef CONFIG_IXGBE_DCA
1522                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1523                         ixgbe_update_tx_dca(adapter, ring);
1524 #endif
1525                 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1526                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1527                                       r_idx + 1);
1528         }
1529
1530         /* attempt to distribute budget to each queue fairly, but don't allow
1531          * the budget to go below 1 because we'll exit polling */
1532         budget /= (q_vector->rxr_count ?: 1);
1533         budget = max(budget, 1);
1534         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1535         for (i = 0; i < q_vector->rxr_count; i++) {
1536                 ring = adapter->rx_ring[r_idx];
1537 #ifdef CONFIG_IXGBE_DCA
1538                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1539                         ixgbe_update_rx_dca(adapter, ring);
1540 #endif
1541                 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1542                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1543                                       r_idx + 1);
1544         }
1545
1546         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1547         ring = adapter->rx_ring[r_idx];
1548         /* If all Rx work done, exit the polling mode */
1549         if (work_done < budget) {
1550                 napi_complete(napi);
1551                 if (adapter->rx_itr_setting & 1)
1552                         ixgbe_set_itr_msix(q_vector);
1553                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1554                         ixgbe_irq_enable_queues(adapter,
1555                                                 ((u64)1 << q_vector->v_idx));
1556                 return 0;
1557         }
1558
1559         return work_done;
1560 }
1561
1562 /**
1563  * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1564  * @napi: napi struct with our devices info in it
1565  * @budget: amount of work driver is allowed to do this pass, in packets
1566  *
1567  * This function is optimized for cleaning one queue only on a single
1568  * q_vector!!!
1569  **/
1570 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1571 {
1572         struct ixgbe_q_vector *q_vector =
1573                                container_of(napi, struct ixgbe_q_vector, napi);
1574         struct ixgbe_adapter *adapter = q_vector->adapter;
1575         struct ixgbe_ring *tx_ring = NULL;
1576         int work_done = 0;
1577         long r_idx;
1578
1579         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1580         tx_ring = adapter->tx_ring[r_idx];
1581 #ifdef CONFIG_IXGBE_DCA
1582         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1583                 ixgbe_update_tx_dca(adapter, tx_ring);
1584 #endif
1585
1586         if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1587                 work_done = budget;
1588
1589         /* If all Tx work done, exit the polling mode */
1590         if (work_done < budget) {
1591                 napi_complete(napi);
1592                 if (adapter->tx_itr_setting & 1)
1593                         ixgbe_set_itr_msix(q_vector);
1594                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1595                         ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1596         }
1597
1598         return work_done;
1599 }
1600
1601 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1602                                      int r_idx)
1603 {
1604         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1605
1606         set_bit(r_idx, q_vector->rxr_idx);
1607         q_vector->rxr_count++;
1608 }
1609
1610 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1611                                      int t_idx)
1612 {
1613         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1614
1615         set_bit(t_idx, q_vector->txr_idx);
1616         q_vector->txr_count++;
1617 }
1618
1619 /**
1620  * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1621  * @adapter: board private structure to initialize
1622  * @vectors: allotted vector count for descriptor rings
1623  *
1624  * This function maps descriptor rings to the queue-specific vectors
1625  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
1626  * one vector per ring/queue, but on a constrained vector budget, we
1627  * group the rings as "efficiently" as possible.  You would add new
1628  * mapping configurations in here.
1629  **/
1630 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1631                                       int vectors)
1632 {
1633         int v_start = 0;
1634         int rxr_idx = 0, txr_idx = 0;
1635         int rxr_remaining = adapter->num_rx_queues;
1636         int txr_remaining = adapter->num_tx_queues;
1637         int i, j;
1638         int rqpv, tqpv;
1639         int err = 0;
1640
1641         /* No mapping required if MSI-X is disabled. */
1642         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1643                 goto out;
1644
1645         /*
1646          * The ideal configuration...
1647          * We have enough vectors to map one per queue.
1648          */
1649         if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1650                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1651                         map_vector_to_rxq(adapter, v_start, rxr_idx);
1652
1653                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1654                         map_vector_to_txq(adapter, v_start, txr_idx);
1655
1656                 goto out;
1657         }
1658
1659         /*
1660          * If we don't have enough vectors for a 1-to-1
1661          * mapping, we'll have to group them so there are
1662          * multiple queues per vector.
1663          */
1664         /* Re-adjusting *qpv takes care of the remainder. */
1665         for (i = v_start; i < vectors; i++) {
1666                 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1667                 for (j = 0; j < rqpv; j++) {
1668                         map_vector_to_rxq(adapter, i, rxr_idx);
1669                         rxr_idx++;
1670                         rxr_remaining--;
1671                 }
1672         }
1673         for (i = v_start; i < vectors; i++) {
1674                 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1675                 for (j = 0; j < tqpv; j++) {
1676                         map_vector_to_txq(adapter, i, txr_idx);
1677                         txr_idx++;
1678                         txr_remaining--;
1679                 }
1680         }
1681
1682 out:
1683         return err;
1684 }
1685
1686 /**
1687  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1688  * @adapter: board private structure
1689  *
1690  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1691  * interrupts from the kernel.
1692  **/
1693 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1694 {
1695         struct net_device *netdev = adapter->netdev;
1696         irqreturn_t (*handler)(int, void *);
1697         int i, vector, q_vectors, err;
1698         int ri=0, ti=0;
1699
1700         /* Decrement for Other and TCP Timer vectors */
1701         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1702
1703         /* Map the Tx/Rx rings to the vectors we were allotted. */
1704         err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1705         if (err)
1706                 goto out;
1707
1708 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1709                          (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1710                          &ixgbe_msix_clean_many)
1711         for (vector = 0; vector < q_vectors; vector++) {
1712                 handler = SET_HANDLER(adapter->q_vector[vector]);
1713
1714                 if(handler == &ixgbe_msix_clean_rx) {
1715                         sprintf(adapter->name[vector], "%s-%s-%d",
1716                                 netdev->name, "rx", ri++);
1717                 }
1718                 else if(handler == &ixgbe_msix_clean_tx) {
1719                         sprintf(adapter->name[vector], "%s-%s-%d",
1720                                 netdev->name, "tx", ti++);
1721                 }
1722                 else
1723                         sprintf(adapter->name[vector], "%s-%s-%d",
1724                                 netdev->name, "TxRx", vector);
1725
1726                 err = request_irq(adapter->msix_entries[vector].vector,
1727                                   handler, 0, adapter->name[vector],
1728                                   adapter->q_vector[vector]);
1729                 if (err) {
1730                         DPRINTK(PROBE, ERR,
1731                                 "request_irq failed for MSIX interrupt "
1732                                 "Error: %d\n", err);
1733                         goto free_queue_irqs;
1734                 }
1735         }
1736
1737         sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1738         err = request_irq(adapter->msix_entries[vector].vector,
1739                           ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1740         if (err) {
1741                 DPRINTK(PROBE, ERR,
1742                         "request_irq for msix_lsc failed: %d\n", err);
1743                 goto free_queue_irqs;
1744         }
1745
1746         return 0;
1747
1748 free_queue_irqs:
1749         for (i = vector - 1; i >= 0; i--)
1750                 free_irq(adapter->msix_entries[--vector].vector,
1751                          adapter->q_vector[i]);
1752         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1753         pci_disable_msix(adapter->pdev);
1754         kfree(adapter->msix_entries);
1755         adapter->msix_entries = NULL;
1756 out:
1757         return err;
1758 }
1759
1760 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1761 {
1762         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1763         u8 current_itr;
1764         u32 new_itr = q_vector->eitr;
1765         struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
1766         struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
1767
1768         q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1769                                             q_vector->tx_itr,
1770                                             tx_ring->total_packets,
1771                                             tx_ring->total_bytes);
1772         q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1773                                             q_vector->rx_itr,
1774                                             rx_ring->total_packets,
1775                                             rx_ring->total_bytes);
1776
1777         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1778
1779         switch (current_itr) {
1780         /* counts and packets in update_itr are dependent on these numbers */
1781         case lowest_latency:
1782                 new_itr = 100000;
1783                 break;
1784         case low_latency:
1785                 new_itr = 20000; /* aka hwitr = ~200 */
1786                 break;
1787         case bulk_latency:
1788                 new_itr = 8000;
1789                 break;
1790         default:
1791                 break;
1792         }
1793
1794         if (new_itr != q_vector->eitr) {
1795                 /* do an exponential smoothing */
1796                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1797
1798                 /* save the algorithm value here, not the smoothed one */
1799                 q_vector->eitr = new_itr;
1800
1801                 ixgbe_write_eitr(q_vector);
1802         }
1803
1804         return;
1805 }
1806
1807 /**
1808  * ixgbe_irq_enable - Enable default interrupt generation settings
1809  * @adapter: board private structure
1810  **/
1811 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1812 {
1813         u32 mask;
1814
1815         mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1816         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1817                 mask |= IXGBE_EIMS_GPI_SDP1;
1818         if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1819                 mask |= IXGBE_EIMS_ECC;
1820                 mask |= IXGBE_EIMS_GPI_SDP1;
1821                 mask |= IXGBE_EIMS_GPI_SDP2;
1822                 if (adapter->num_vfs)
1823                         mask |= IXGBE_EIMS_MAILBOX;
1824         }
1825         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1826             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1827                 mask |= IXGBE_EIMS_FLOW_DIR;
1828
1829         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1830         ixgbe_irq_enable_queues(adapter, ~0);
1831         IXGBE_WRITE_FLUSH(&adapter->hw);
1832
1833         if (adapter->num_vfs > 32) {
1834                 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
1835                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
1836         }
1837 }
1838
1839 /**
1840  * ixgbe_intr - legacy mode Interrupt Handler
1841  * @irq: interrupt number
1842  * @data: pointer to a network interface device structure
1843  **/
1844 static irqreturn_t ixgbe_intr(int irq, void *data)
1845 {
1846         struct net_device *netdev = data;
1847         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1848         struct ixgbe_hw *hw = &adapter->hw;
1849         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1850         u32 eicr;
1851
1852         /*
1853          * Workaround for silicon errata.  Mask the interrupts
1854          * before the read of EICR.
1855          */
1856         IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1857
1858         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1859          * therefore no explict interrupt disable is necessary */
1860         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1861         if (!eicr) {
1862                 /* shared interrupt alert!
1863                  * make sure interrupts are enabled because the read will
1864                  * have disabled interrupts due to EIAM */
1865                 ixgbe_irq_enable(adapter);
1866                 return IRQ_NONE;        /* Not our interrupt */
1867         }
1868
1869         if (eicr & IXGBE_EICR_LSC)
1870                 ixgbe_check_lsc(adapter);
1871
1872         if (hw->mac.type == ixgbe_mac_82599EB)
1873                 ixgbe_check_sfp_event(adapter, eicr);
1874
1875         ixgbe_check_fan_failure(adapter, eicr);
1876
1877         if (napi_schedule_prep(&(q_vector->napi))) {
1878                 adapter->tx_ring[0]->total_packets = 0;
1879                 adapter->tx_ring[0]->total_bytes = 0;
1880                 adapter->rx_ring[0]->total_packets = 0;
1881                 adapter->rx_ring[0]->total_bytes = 0;
1882                 /* would disable interrupts here but EIAM disabled it */
1883                 __napi_schedule(&(q_vector->napi));
1884         }
1885
1886         return IRQ_HANDLED;
1887 }
1888
1889 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1890 {
1891         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1892
1893         for (i = 0; i < q_vectors; i++) {
1894                 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1895                 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1896                 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1897                 q_vector->rxr_count = 0;
1898                 q_vector->txr_count = 0;
1899         }
1900 }
1901
1902 /**
1903  * ixgbe_request_irq - initialize interrupts
1904  * @adapter: board private structure
1905  *
1906  * Attempts to configure interrupts using the best available
1907  * capabilities of the hardware and kernel.
1908  **/
1909 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1910 {
1911         struct net_device *netdev = adapter->netdev;
1912         int err;
1913
1914         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1915                 err = ixgbe_request_msix_irqs(adapter);
1916         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1917                 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
1918                                   netdev->name, netdev);
1919         } else {
1920                 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
1921                                   netdev->name, netdev);
1922         }
1923
1924         if (err)
1925                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1926
1927         return err;
1928 }
1929
1930 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1931 {
1932         struct net_device *netdev = adapter->netdev;
1933
1934         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1935                 int i, q_vectors;
1936
1937                 q_vectors = adapter->num_msix_vectors;
1938
1939                 i = q_vectors - 1;
1940                 free_irq(adapter->msix_entries[i].vector, netdev);
1941
1942                 i--;
1943                 for (; i >= 0; i--) {
1944                         free_irq(adapter->msix_entries[i].vector,
1945                                  adapter->q_vector[i]);
1946                 }
1947
1948                 ixgbe_reset_q_vectors(adapter);
1949         } else {
1950                 free_irq(adapter->pdev->irq, netdev);
1951         }
1952 }
1953
1954 /**
1955  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1956  * @adapter: board private structure
1957  **/
1958 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1959 {
1960         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1961                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1962         } else {
1963                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1964                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1965                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1966                 if (adapter->num_vfs > 32)
1967                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
1968         }
1969         IXGBE_WRITE_FLUSH(&adapter->hw);
1970         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1971                 int i;
1972                 for (i = 0; i < adapter->num_msix_vectors; i++)
1973                         synchronize_irq(adapter->msix_entries[i].vector);
1974         } else {
1975                 synchronize_irq(adapter->pdev->irq);
1976         }
1977 }
1978
1979 /**
1980  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1981  *
1982  **/
1983 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1984 {
1985         struct ixgbe_hw *hw = &adapter->hw;
1986
1987         IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1988                         EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
1989
1990         ixgbe_set_ivar(adapter, 0, 0, 0);
1991         ixgbe_set_ivar(adapter, 1, 0, 0);
1992
1993         map_vector_to_rxq(adapter, 0, 0);
1994         map_vector_to_txq(adapter, 0, 0);
1995
1996         DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1997 }
1998
1999 /**
2000  * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2001  * @adapter: board private structure
2002  *
2003  * Configure the Tx unit of the MAC after a reset.
2004  **/
2005 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2006 {
2007         u64 tdba;
2008         struct ixgbe_hw *hw = &adapter->hw;
2009         u32 i, j, tdlen, txctrl;
2010
2011         /* Setup the HW Tx Head and Tail descriptor pointers */
2012         for (i = 0; i < adapter->num_tx_queues; i++) {
2013                 struct ixgbe_ring *ring = adapter->tx_ring[i];
2014                 j = ring->reg_idx;
2015                 tdba = ring->dma;
2016                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
2017                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
2018                                 (tdba & DMA_BIT_MASK(32)));
2019                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
2020                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
2021                 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
2022                 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
2023                 adapter->tx_ring[i]->head = IXGBE_TDH(j);
2024                 adapter->tx_ring[i]->tail = IXGBE_TDT(j);
2025                 /*
2026                  * Disable Tx Head Writeback RO bit, since this hoses
2027                  * bookkeeping if things aren't delivered in order.
2028                  */
2029                 switch (hw->mac.type) {
2030                 case ixgbe_mac_82598EB:
2031                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
2032                         break;
2033                 case ixgbe_mac_82599EB:
2034                 default:
2035                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
2036                         break;
2037                 }
2038                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
2039                 switch (hw->mac.type) {
2040                 case ixgbe_mac_82598EB:
2041                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
2042                         break;
2043                 case ixgbe_mac_82599EB:
2044                 default:
2045                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
2046                         break;
2047                 }
2048         }
2049
2050         if (hw->mac.type == ixgbe_mac_82599EB) {
2051                 u32 rttdcs;
2052                 u32 mask;
2053
2054                 /* disable the arbiter while setting MTQC */
2055                 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2056                 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2057                 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2058
2059                 /* set transmit pool layout */
2060                 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2061                 switch (adapter->flags & mask) {
2062
2063                 case (IXGBE_FLAG_SRIOV_ENABLED):
2064                         IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2065                                         (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2066                         break;
2067
2068                 case (IXGBE_FLAG_DCB_ENABLED):
2069                         /* We enable 8 traffic classes, DCB only */
2070                         IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2071                                       (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2072                         break;
2073
2074                 default:
2075                         IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2076                         break;
2077                 }
2078
2079                 /* re-eable the arbiter */
2080                 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2081                 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2082         }
2083 }
2084
2085 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2086
2087 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2088                                    struct ixgbe_ring *rx_ring)
2089 {
2090         u32 srrctl;
2091         int index;
2092         struct ixgbe_ring_feature *feature = adapter->ring_feature;
2093
2094         index = rx_ring->reg_idx;
2095         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2096                 unsigned long mask;
2097                 mask = (unsigned long) feature[RING_F_RSS].mask;
2098                 index = index & mask;
2099         }
2100         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2101
2102         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2103         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2104
2105         srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2106                   IXGBE_SRRCTL_BSIZEHDR_MASK;
2107
2108         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2109 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2110                 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2111 #else
2112                 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2113 #endif
2114                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2115         } else {
2116                 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2117                           IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2118                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2119         }
2120
2121         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2122 }
2123
2124 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2125 {
2126         u32 mrqc = 0;
2127         int mask;
2128
2129         if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
2130                 return mrqc;
2131
2132         mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2133 #ifdef CONFIG_IXGBE_DCB
2134                                  | IXGBE_FLAG_DCB_ENABLED
2135 #endif
2136                                  | IXGBE_FLAG_SRIOV_ENABLED
2137                                 );
2138
2139         switch (mask) {
2140         case (IXGBE_FLAG_RSS_ENABLED):
2141                 mrqc = IXGBE_MRQC_RSSEN;
2142                 break;
2143         case (IXGBE_FLAG_SRIOV_ENABLED):
2144                 mrqc = IXGBE_MRQC_VMDQEN;
2145                 break;
2146 #ifdef CONFIG_IXGBE_DCB
2147         case (IXGBE_FLAG_DCB_ENABLED):
2148                 mrqc = IXGBE_MRQC_RT8TCEN;
2149                 break;
2150 #endif /* CONFIG_IXGBE_DCB */
2151         default:
2152                 break;
2153         }
2154
2155         return mrqc;
2156 }
2157
2158 /**
2159  * ixgbe_configure_rscctl - enable RSC for the indicated ring
2160  * @adapter:    address of board private structure
2161  * @index:      index of ring to set
2162  **/
2163 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index)
2164 {
2165         struct ixgbe_ring *rx_ring;
2166         struct ixgbe_hw *hw = &adapter->hw;
2167         int j;
2168         u32 rscctrl;
2169         int rx_buf_len;
2170
2171         rx_ring = adapter->rx_ring[index];
2172         j = rx_ring->reg_idx;
2173         rx_buf_len = rx_ring->rx_buf_len;
2174         rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2175         rscctrl |= IXGBE_RSCCTL_RSCEN;
2176         /*
2177          * we must limit the number of descriptors so that the
2178          * total size of max desc * buf_len is not greater
2179          * than 65535
2180          */
2181         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2182 #if (MAX_SKB_FRAGS > 16)
2183                 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2184 #elif (MAX_SKB_FRAGS > 8)
2185                 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2186 #elif (MAX_SKB_FRAGS > 4)
2187                 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2188 #else
2189                 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2190 #endif
2191         } else {
2192                 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2193                         rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2194                 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2195                         rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2196                 else
2197                         rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2198         }
2199         IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2200 }
2201
2202 /**
2203  * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2204  * @adapter: board private structure
2205  *
2206  * Configure the Rx unit of the MAC after a reset.
2207  **/
2208 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2209 {
2210         u64 rdba;
2211         struct ixgbe_hw *hw = &adapter->hw;
2212         struct ixgbe_ring *rx_ring;
2213         struct net_device *netdev = adapter->netdev;
2214         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2215         int i, j;
2216         u32 rdlen, rxctrl, rxcsum;
2217         static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2218                           0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2219                           0x6A3E67EA, 0x14364D17, 0x3BED200D};
2220         u32 fctrl, hlreg0;
2221         u32 reta = 0, mrqc = 0;
2222         u32 rdrxctl;
2223         int rx_buf_len;
2224
2225         /* Decide whether to use packet split mode or not */
2226         /* Do not use packet split if we're in SR-IOV Mode */
2227         if (!adapter->num_vfs)
2228                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2229
2230         /* Set the RX buffer length according to the mode */
2231         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2232                 rx_buf_len = IXGBE_RX_HDR_SIZE;
2233                 if (hw->mac.type == ixgbe_mac_82599EB) {
2234                         /* PSRTYPE must be initialized in 82599 */
2235                         u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2236                                       IXGBE_PSRTYPE_UDPHDR |
2237                                       IXGBE_PSRTYPE_IPV4HDR |
2238                                       IXGBE_PSRTYPE_IPV6HDR |
2239                                       IXGBE_PSRTYPE_L2HDR;
2240                         IXGBE_WRITE_REG(hw,
2241                                         IXGBE_PSRTYPE(adapter->num_vfs),
2242                                         psrtype);
2243                 }
2244         } else {
2245                 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2246                     (netdev->mtu <= ETH_DATA_LEN))
2247                         rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2248                 else
2249                         rx_buf_len = ALIGN(max_frame, 1024);
2250         }
2251
2252         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2253         fctrl |= IXGBE_FCTRL_BAM;
2254         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2255         fctrl |= IXGBE_FCTRL_PMCF;
2256         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2257
2258         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2259         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2260                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2261         else
2262                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2263 #ifdef IXGBE_FCOE
2264         if (netdev->features & NETIF_F_FCOE_MTU)
2265                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2266 #endif
2267         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2268
2269         rdlen = adapter->rx_ring[0]->count * sizeof(union ixgbe_adv_rx_desc);
2270         /* disable receives while setting up the descriptors */
2271         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2272         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2273
2274         /*
2275          * Setup the HW Rx Head and Tail Descriptor Pointers and
2276          * the Base and Length of the Rx Descriptor Ring
2277          */
2278         for (i = 0; i < adapter->num_rx_queues; i++) {
2279                 rx_ring = adapter->rx_ring[i];
2280                 rdba = rx_ring->dma;
2281                 j = rx_ring->reg_idx;
2282                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2283                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2284                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2285                 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2286                 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2287                 rx_ring->head = IXGBE_RDH(j);
2288                 rx_ring->tail = IXGBE_RDT(j);
2289                 rx_ring->rx_buf_len = rx_buf_len;
2290
2291                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2292                         rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2293                 else
2294                         rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2295
2296 #ifdef IXGBE_FCOE
2297                 if (netdev->features & NETIF_F_FCOE_MTU) {
2298                         struct ixgbe_ring_feature *f;
2299                         f = &adapter->ring_feature[RING_F_FCOE];
2300                         if ((i >= f->mask) && (i < f->mask + f->indices)) {
2301                                 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2302                                 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2303                                         rx_ring->rx_buf_len =
2304                                                 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2305                         }
2306                 }
2307
2308 #endif /* IXGBE_FCOE */
2309                 ixgbe_configure_srrctl(adapter, rx_ring);
2310         }
2311
2312         if (hw->mac.type == ixgbe_mac_82598EB) {
2313                 /*
2314                  * For VMDq support of different descriptor types or
2315                  * buffer sizes through the use of multiple SRRCTL
2316                  * registers, RDRXCTL.MVMEN must be set to 1
2317                  *
2318                  * also, the manual doesn't mention it clearly but DCA hints
2319                  * will only use queue 0's tags unless this bit is set.  Side
2320                  * effects of setting this bit are only that SRRCTL must be
2321                  * fully programmed [0..15]
2322                  */
2323                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2324                 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2325                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2326         }
2327
2328         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2329                 u32 vt_reg_bits;
2330                 u32 reg_offset, vf_shift;
2331                 u32 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2332                 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN
2333                         | IXGBE_VT_CTL_REPLEN;
2334                 vt_reg_bits |= (adapter->num_vfs <<
2335                                 IXGBE_VT_CTL_POOL_SHIFT);
2336                 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2337                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, 0);
2338
2339                 vf_shift = adapter->num_vfs % 32;
2340                 reg_offset = adapter->num_vfs / 32;
2341                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
2342                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
2343                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
2344                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
2345                 /* Enable only the PF's pool for Tx/Rx */
2346                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2347                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2348                 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2349                 ixgbe_set_vmolr(hw, adapter->num_vfs);
2350         }
2351
2352         /* Program MRQC for the distribution of queues */
2353         mrqc = ixgbe_setup_mrqc(adapter);
2354
2355         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2356                 /* Fill out redirection table */
2357                 for (i = 0, j = 0; i < 128; i++, j++) {
2358                         if (j == adapter->ring_feature[RING_F_RSS].indices)
2359                                 j = 0;
2360                         /* reta = 4-byte sliding window of
2361                          * 0x00..(indices-1)(indices-1)00..etc. */
2362                         reta = (reta << 8) | (j * 0x11);
2363                         if ((i & 3) == 3)
2364                                 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2365                 }
2366
2367                 /* Fill out hash function seeds */
2368                 for (i = 0; i < 10; i++)
2369                         IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2370
2371                 if (hw->mac.type == ixgbe_mac_82598EB)
2372                         mrqc |= IXGBE_MRQC_RSSEN;
2373                     /* Perform hash on these packet types */
2374                 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2375                       | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2376                       | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2377                       | IXGBE_MRQC_RSS_FIELD_IPV6
2378                       | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2379                       | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2380         }
2381         IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2382
2383         if (adapter->num_vfs) {
2384                 u32 reg;
2385
2386                 /* Map PF MAC address in RAR Entry 0 to first pool
2387                  * following VFs */
2388                 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2389
2390                 /* Set up VF register offsets for selected VT Mode, i.e.
2391                  * 64 VFs for SR-IOV */
2392                 reg = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2393                 reg |= IXGBE_GCR_EXT_SRIOV;
2394                 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, reg);
2395         }
2396
2397         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2398
2399         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2400             adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2401                 /* Disable indicating checksum in descriptor, enables
2402                  * RSS hash */
2403                 rxcsum |= IXGBE_RXCSUM_PCSD;
2404         }
2405         if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2406                 /* Enable IPv4 payload checksum for UDP fragments
2407                  * if PCSD is not set */
2408                 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2409         }
2410
2411         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2412
2413         if (hw->mac.type == ixgbe_mac_82599EB) {
2414                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2415                 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2416                 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2417                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2418         }
2419
2420         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2421                 /* Enable 82599 HW-RSC */
2422                 for (i = 0; i < adapter->num_rx_queues; i++)
2423                         ixgbe_configure_rscctl(adapter, i);
2424
2425                 /* Disable RSC for ACK packets */
2426                 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2427                    (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2428         }
2429 }
2430
2431 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2432 {
2433         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2434         struct ixgbe_hw *hw = &adapter->hw;
2435         int pool_ndx = adapter->num_vfs;
2436
2437         /* add VID to filter table */
2438         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
2439 }
2440
2441 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2442 {
2443         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2444         struct ixgbe_hw *hw = &adapter->hw;
2445         int pool_ndx = adapter->num_vfs;
2446
2447         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2448                 ixgbe_irq_disable(adapter);
2449
2450         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2451
2452         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2453                 ixgbe_irq_enable(adapter);
2454
2455         /* remove VID from filter table */
2456         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
2457 }
2458
2459 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2460                                    struct vlan_group *grp)
2461 {
2462         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2463         u32 ctrl;
2464         int i, j;
2465
2466         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2467                 ixgbe_irq_disable(adapter);
2468         adapter->vlgrp = grp;
2469
2470         /*
2471          * For a DCB driver, always enable VLAN tag stripping so we can
2472          * still receive traffic from a DCB-enabled host even if we're
2473          * not in DCB mode.
2474          */
2475         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2476
2477         /* Disable CFI check */
2478         ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2479
2480         /* enable VLAN tag stripping */
2481         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2482                 ctrl |= IXGBE_VLNCTRL_VME;
2483         } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2484                 for (i = 0; i < adapter->num_rx_queues; i++) {
2485                         u32 ctrl;
2486                         j = adapter->rx_ring[i]->reg_idx;
2487                         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2488                         ctrl |= IXGBE_RXDCTL_VME;
2489                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2490                 }
2491         }
2492
2493         IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2494
2495         ixgbe_vlan_rx_add_vid(netdev, 0);
2496
2497         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2498                 ixgbe_irq_enable(adapter);
2499 }
2500
2501 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2502 {
2503         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2504
2505         if (adapter->vlgrp) {
2506                 u16 vid;
2507                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2508                         if (!vlan_group_get_device(adapter->vlgrp, vid))
2509                                 continue;
2510                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2511                 }
2512         }
2513 }
2514
2515 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2516 {
2517         struct dev_mc_list *mc_ptr;
2518         u8 *addr = *mc_addr_ptr;
2519         *vmdq = 0;
2520
2521         mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2522         if (mc_ptr->next)
2523                 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2524         else
2525                 *mc_addr_ptr = NULL;
2526
2527         return addr;
2528 }
2529
2530 /**
2531  * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2532  * @netdev: network interface device structure
2533  *
2534  * The set_rx_method entry point is called whenever the unicast/multicast
2535  * address list or the network interface flags are updated.  This routine is
2536  * responsible for configuring the hardware for proper unicast, multicast and
2537  * promiscuous mode.
2538  **/
2539 void ixgbe_set_rx_mode(struct net_device *netdev)
2540 {
2541         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2542         struct ixgbe_hw *hw = &adapter->hw;
2543         u32 fctrl, vlnctrl;
2544         u8 *addr_list = NULL;
2545         int addr_count = 0;
2546
2547         /* Check for Promiscuous and All Multicast modes */
2548
2549         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2550         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2551
2552         if (netdev->flags & IFF_PROMISC) {
2553                 hw->addr_ctrl.user_set_promisc = 1;
2554                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2555                 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2556         } else {
2557                 if (netdev->flags & IFF_ALLMULTI) {
2558                         fctrl |= IXGBE_FCTRL_MPE;
2559                         fctrl &= ~IXGBE_FCTRL_UPE;
2560                 } else {
2561                         fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2562                 }
2563                 vlnctrl |= IXGBE_VLNCTRL_VFE;
2564                 hw->addr_ctrl.user_set_promisc = 0;
2565         }
2566
2567         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2568         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2569
2570         /* reprogram secondary unicast list */
2571         hw->mac.ops.update_uc_addr_list(hw, netdev);
2572
2573         /* reprogram multicast list */
2574         addr_count = netdev_mc_count(netdev);
2575         if (addr_count)
2576                 addr_list = netdev->mc_list->dmi_addr;
2577         hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2578                                         ixgbe_addr_list_itr);
2579         if (adapter->num_vfs)
2580                 ixgbe_restore_vf_multicasts(adapter);
2581 }
2582
2583 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2584 {
2585         int q_idx;
2586         struct ixgbe_q_vector *q_vector;
2587         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2588
2589         /* legacy and MSI only use one vector */
2590         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2591                 q_vectors = 1;
2592
2593         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2594                 struct napi_struct *napi;
2595                 q_vector = adapter->q_vector[q_idx];
2596                 napi = &q_vector->napi;
2597                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2598                         if (!q_vector->rxr_count || !q_vector->txr_count) {
2599                                 if (q_vector->txr_count == 1)
2600                                         napi->poll = &ixgbe_clean_txonly;
2601                                 else if (q_vector->rxr_count == 1)
2602                                         napi->poll = &ixgbe_clean_rxonly;
2603                         }
2604                 }
2605
2606                 napi_enable(napi);
2607         }
2608 }
2609
2610 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2611 {
2612         int q_idx;
2613         struct ixgbe_q_vector *q_vector;
2614         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2615
2616         /* legacy and MSI only use one vector */
2617         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2618                 q_vectors = 1;
2619
2620         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2621                 q_vector = adapter->q_vector[q_idx];
2622                 napi_disable(&q_vector->napi);
2623         }
2624 }
2625
2626 #ifdef CONFIG_IXGBE_DCB
2627 /*
2628  * ixgbe_configure_dcb - Configure DCB hardware
2629  * @adapter: ixgbe adapter struct
2630  *
2631  * This is called by the driver on open to configure the DCB hardware.
2632  * This is also called by the gennetlink interface when reconfiguring
2633  * the DCB state.
2634  */
2635 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2636 {
2637         struct ixgbe_hw *hw = &adapter->hw;
2638         u32 txdctl, vlnctrl;
2639         int i, j;
2640
2641         ixgbe_dcb_check_config(&adapter->dcb_cfg);
2642         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2643         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2644
2645         /* reconfigure the hardware */
2646         ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2647
2648         for (i = 0; i < adapter->num_tx_queues; i++) {
2649                 j = adapter->tx_ring[i]->reg_idx;
2650                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2651                 /* PThresh workaround for Tx hang with DFP enabled. */
2652                 txdctl |= 32;
2653                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2654         }
2655         /* Enable VLAN tag insert/strip */
2656         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2657         if (hw->mac.type == ixgbe_mac_82598EB) {
2658                 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2659                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2660                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2661         } else if (hw->mac.type == ixgbe_mac_82599EB) {
2662                 vlnctrl |= IXGBE_VLNCTRL_VFE;
2663                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2664                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2665                 for (i = 0; i < adapter->num_rx_queues; i++) {
2666                         j = adapter->rx_ring[i]->reg_idx;
2667                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2668                         vlnctrl |= IXGBE_RXDCTL_VME;
2669                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2670                 }
2671         }
2672         hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2673 }
2674
2675 #endif
2676 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2677 {
2678         struct net_device *netdev = adapter->netdev;
2679         struct ixgbe_hw *hw = &adapter->hw;
2680         int i;
2681
2682         ixgbe_set_rx_mode(netdev);
2683
2684         ixgbe_restore_vlan(adapter);
2685 #ifdef CONFIG_IXGBE_DCB
2686         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2687                 if (hw->mac.type == ixgbe_mac_82598EB)
2688                         netif_set_gso_max_size(netdev, 32768);
2689                 else
2690                         netif_set_gso_max_size(netdev, 65536);
2691                 ixgbe_configure_dcb(adapter);
2692         } else {
2693                 netif_set_gso_max_size(netdev, 65536);
2694         }
2695 #else
2696         netif_set_gso_max_size(netdev, 65536);
2697 #endif
2698
2699 #ifdef IXGBE_FCOE
2700         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2701                 ixgbe_configure_fcoe(adapter);
2702
2703 #endif /* IXGBE_FCOE */
2704         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2705                 for (i = 0; i < adapter->num_tx_queues; i++)
2706                         adapter->tx_ring[i]->atr_sample_rate =
2707                                                        adapter->atr_sample_rate;
2708                 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2709         } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2710                 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2711         }
2712
2713         ixgbe_configure_tx(adapter);
2714         ixgbe_configure_rx(adapter);
2715         for (i = 0; i < adapter->num_rx_queues; i++)
2716                 ixgbe_alloc_rx_buffers(adapter, adapter->rx_ring[i],
2717                                        (adapter->rx_ring[i]->count - 1));
2718 }
2719
2720 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2721 {
2722         switch (hw->phy.type) {
2723         case ixgbe_phy_sfp_avago:
2724         case ixgbe_phy_sfp_ftl:
2725         case ixgbe_phy_sfp_intel:
2726         case ixgbe_phy_sfp_unknown:
2727         case ixgbe_phy_tw_tyco:
2728         case ixgbe_phy_tw_unknown:
2729                 return true;
2730         default:
2731                 return false;
2732         }
2733 }
2734
2735 /**
2736  * ixgbe_sfp_link_config - set up SFP+ link
2737  * @adapter: pointer to private adapter struct
2738  **/
2739 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2740 {
2741         struct ixgbe_hw *hw = &adapter->hw;
2742
2743                 if (hw->phy.multispeed_fiber) {
2744                         /*
2745                          * In multispeed fiber setups, the device may not have
2746                          * had a physical connection when the driver loaded.
2747                          * If that's the case, the initial link configuration
2748                          * couldn't get the MAC into 10G or 1G mode, so we'll
2749                          * never have a link status change interrupt fire.
2750                          * We need to try and force an autonegotiation
2751                          * session, then bring up link.
2752                          */
2753                         hw->mac.ops.setup_sfp(hw);
2754                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2755                                 schedule_work(&adapter->multispeed_fiber_task);
2756                 } else {
2757                         /*
2758                          * Direct Attach Cu and non-multispeed fiber modules
2759                          * still need to be configured properly prior to
2760                          * attempting link.
2761                          */
2762                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2763                                 schedule_work(&adapter->sfp_config_module_task);
2764                 }
2765 }
2766
2767 /**
2768  * ixgbe_non_sfp_link_config - set up non-SFP+ link
2769  * @hw: pointer to private hardware struct
2770  *
2771  * Returns 0 on success, negative on failure
2772  **/
2773 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2774 {
2775         u32 autoneg;
2776         bool negotiation, link_up = false;
2777         u32 ret = IXGBE_ERR_LINK_SETUP;
2778
2779         if (hw->mac.ops.check_link)
2780                 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2781
2782         if (ret)
2783                 goto link_cfg_out;
2784
2785         if (hw->mac.ops.get_link_capabilities)
2786                 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2787         if (ret)
2788                 goto link_cfg_out;
2789
2790         if (hw->mac.ops.setup_link)
2791                 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2792 link_cfg_out:
2793         return ret;
2794 }
2795
2796 #define IXGBE_MAX_RX_DESC_POLL 10
2797 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2798                                               int rxr)
2799 {
2800         int j = adapter->rx_ring[rxr]->reg_idx;
2801         int k;
2802
2803         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2804                 if (IXGBE_READ_REG(&adapter->hw,
2805                                    IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2806                         break;
2807                 else
2808                         msleep(1);
2809         }
2810         if (k >= IXGBE_MAX_RX_DESC_POLL) {
2811                 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2812                         "not set within the polling period\n", rxr);
2813         }
2814         ixgbe_release_rx_desc(&adapter->hw, adapter->rx_ring[rxr],
2815                               (adapter->rx_ring[rxr]->count - 1));
2816 }
2817
2818 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2819 {
2820         struct net_device *netdev = adapter->netdev;
2821         struct ixgbe_hw *hw = &adapter->hw;
2822         int i, j = 0;
2823         int num_rx_rings = adapter->num_rx_queues;
2824         int err;
2825         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2826         u32 txdctl, rxdctl, mhadd;
2827         u32 dmatxctl;
2828         u32 gpie;
2829         u32 ctrl_ext;
2830
2831         ixgbe_get_hw_control(adapter);
2832
2833         if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2834             (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2835                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2836                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2837                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2838                 } else {
2839                         /* MSI only */
2840                         gpie = 0;
2841                 }
2842                 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2843                         gpie &= ~IXGBE_GPIE_VTMODE_MASK;
2844                         gpie |= IXGBE_GPIE_VTMODE_64;
2845                 }
2846                 /* XXX: to interrupt immediately for EICS writes, enable this */
2847                 /* gpie |= IXGBE_GPIE_EIMEN; */
2848                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2849         }
2850
2851         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2852                 /*
2853                  * use EIAM to auto-mask when MSI-X interrupt is asserted
2854                  * this saves a register write for every interrupt
2855                  */
2856                 switch (hw->mac.type) {
2857                 case ixgbe_mac_82598EB:
2858                         IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2859                         break;
2860                 default:
2861                 case ixgbe_mac_82599EB:
2862                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
2863                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
2864                         break;
2865                 }
2866         } else {
2867                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2868                  * specifically only auto mask tx and rx interrupts */
2869                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2870         }
2871
2872         /* Enable fan failure interrupt if media type is copper */
2873         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2874                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2875                 gpie |= IXGBE_SDP1_GPIEN;
2876                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2877         }
2878
2879         if (hw->mac.type == ixgbe_mac_82599EB) {
2880                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2881                 gpie |= IXGBE_SDP1_GPIEN;
2882                 gpie |= IXGBE_SDP2_GPIEN;
2883                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2884         }
2885
2886 #ifdef IXGBE_FCOE
2887         /* adjust max frame to be able to do baby jumbo for FCoE */
2888         if ((netdev->features & NETIF_F_FCOE_MTU) &&
2889             (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2890                 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2891
2892 #endif /* IXGBE_FCOE */
2893         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2894         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2895                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2896                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2897
2898                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2899         }
2900
2901         for (i = 0; i < adapter->num_tx_queues; i++) {
2902                 j = adapter->tx_ring[i]->reg_idx;
2903                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2904                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2905                 txdctl |= (8 << 16);
2906                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2907         }
2908
2909         if (hw->mac.type == ixgbe_mac_82599EB) {
2910                 /* DMATXCTL.EN must be set after all Tx queue config is done */
2911                 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2912                 dmatxctl |= IXGBE_DMATXCTL_TE;
2913                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2914         }
2915         for (i = 0; i < adapter->num_tx_queues; i++) {
2916                 j = adapter->tx_ring[i]->reg_idx;
2917                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2918                 txdctl |= IXGBE_TXDCTL_ENABLE;
2919                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2920                 if (hw->mac.type == ixgbe_mac_82599EB) {
2921                         int wait_loop = 10;
2922                         /* poll for Tx Enable ready */
2923                         do {
2924                                 msleep(1);
2925                                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2926                         } while (--wait_loop &&
2927                                  !(txdctl & IXGBE_TXDCTL_ENABLE));
2928                         if (!wait_loop)
2929                                 DPRINTK(DRV, ERR, "Could not enable "
2930                                         "Tx Queue %d\n", j);
2931                 }
2932         }
2933
2934         for (i = 0; i < num_rx_rings; i++) {
2935                 j = adapter->rx_ring[i]->reg_idx;
2936                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2937                 /* enable PTHRESH=32 descriptors (half the internal cache)
2938                  * and HTHRESH=0 descriptors (to minimize latency on fetch),
2939                  * this also removes a pesky rx_no_buffer_count increment */
2940                 rxdctl |= 0x0020;
2941                 rxdctl |= IXGBE_RXDCTL_ENABLE;
2942                 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2943                 if (hw->mac.type == ixgbe_mac_82599EB)
2944                         ixgbe_rx_desc_queue_enable(adapter, i);
2945         }
2946         /* enable all receives */
2947         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2948         if (hw->mac.type == ixgbe_mac_82598EB)
2949                 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2950         else
2951                 rxdctl |= IXGBE_RXCTRL_RXEN;
2952         hw->mac.ops.enable_rx_dma(hw, rxdctl);
2953
2954         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2955                 ixgbe_configure_msix(adapter);
2956         else
2957                 ixgbe_configure_msi_and_legacy(adapter);
2958
2959         clear_bit(__IXGBE_DOWN, &adapter->state);
2960         ixgbe_napi_enable_all(adapter);
2961
2962         /* clear any pending interrupts, may auto mask */
2963         IXGBE_READ_REG(hw, IXGBE_EICR);
2964
2965         ixgbe_irq_enable(adapter);
2966
2967         /*
2968          * If this adapter has a fan, check to see if we had a failure
2969          * before we enabled the interrupt.
2970          */
2971         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2972                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2973                 if (esdp & IXGBE_ESDP_SDP1)
2974                         DPRINTK(DRV, CRIT,
2975                                 "Fan has stopped, replace the adapter\n");
2976         }
2977
2978         /*
2979          * For hot-pluggable SFP+ devices, a new SFP+ module may have
2980          * arrived before interrupts were enabled but after probe.  Such
2981          * devices wouldn't have their type identified yet. We need to
2982          * kick off the SFP+ module setup first, then try to bring up link.
2983          * If we're not hot-pluggable SFP+, we just need to configure link
2984          * and bring it up.
2985          */
2986         if (hw->phy.type == ixgbe_phy_unknown) {
2987                 err = hw->phy.ops.identify(hw);
2988                 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2989                         /*
2990                          * Take the device down and schedule the sfp tasklet
2991                          * which will unregister_netdev and log it.
2992                          */
2993                         ixgbe_down(adapter);
2994                         schedule_work(&adapter->sfp_config_module_task);
2995                         return err;
2996                 }
2997         }
2998
2999         if (ixgbe_is_sfp(hw)) {
3000                 ixgbe_sfp_link_config(adapter);
3001         } else {
3002                 err = ixgbe_non_sfp_link_config(hw);
3003                 if (err)
3004                         DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
3005         }
3006
3007         for (i = 0; i < adapter->num_tx_queues; i++)
3008                 set_bit(__IXGBE_FDIR_INIT_DONE,
3009                         &(adapter->tx_ring[i]->reinit_state));
3010
3011         /* enable transmits */
3012         netif_tx_start_all_queues(netdev);
3013
3014         /* bring the link up in the watchdog, this could race with our first
3015          * link up interrupt but shouldn't be a problem */
3016         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3017         adapter->link_check_timeout = jiffies;
3018         mod_timer(&adapter->watchdog_timer, jiffies);
3019
3020         /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3021         ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3022         ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3023         IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3024
3025         return 0;
3026 }
3027
3028 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3029 {
3030         WARN_ON(in_interrupt());
3031         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3032                 msleep(1);
3033         ixgbe_down(adapter);
3034         ixgbe_up(adapter);
3035         clear_bit(__IXGBE_RESETTING, &adapter->state);
3036 }
3037
3038 int ixgbe_up(struct ixgbe_adapter *adapter)
3039 {
3040         /* hardware has been reset, we need to reload some things */
3041         ixgbe_configure(adapter);
3042
3043         return ixgbe_up_complete(adapter);
3044 }
3045
3046 void ixgbe_reset(struct ixgbe_adapter *adapter)
3047 {
3048         struct ixgbe_hw *hw = &adapter->hw;
3049         int err;
3050
3051         err = hw->mac.ops.init_hw(hw);
3052         switch (err) {
3053         case 0:
3054         case IXGBE_ERR_SFP_NOT_PRESENT:
3055                 break;
3056         case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3057                 dev_err(&adapter->pdev->dev, "master disable timed out\n");
3058                 break;
3059         case IXGBE_ERR_EEPROM_VERSION:
3060                 /* We are running on a pre-production device, log a warning */
3061                 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
3062                          "adapter/LOM.  Please be aware there may be issues "
3063                          "associated with your hardware.  If you are "
3064                          "experiencing problems please contact your Intel or "
3065                          "hardware representative who provided you with this "
3066                          "hardware.\n");
3067                 break;
3068         default:
3069                 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
3070         }
3071
3072         /* reprogram the RAR[0] in case user changed it. */
3073         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3074                             IXGBE_RAH_AV);
3075 }
3076
3077 /**
3078  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3079  * @adapter: board private structure
3080  * @rx_ring: ring to free buffers from
3081  **/
3082 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
3083                                 struct ixgbe_ring *rx_ring)
3084 {
3085         struct pci_dev *pdev = adapter->pdev;
3086         unsigned long size;
3087         unsigned int i;
3088
3089         /* Free all the Rx ring sk_buffs */
3090
3091         for (i = 0; i < rx_ring->count; i++) {
3092                 struct ixgbe_rx_buffer *rx_buffer_info;
3093
3094                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3095                 if (rx_buffer_info->dma) {
3096                         pci_unmap_single(pdev, rx_buffer_info->dma,
3097                                          rx_ring->rx_buf_len,
3098                                          PCI_DMA_FROMDEVICE);
3099                         rx_buffer_info->dma = 0;
3100                 }
3101                 if (rx_buffer_info->skb) {
3102                         struct sk_buff *skb = rx_buffer_info->skb;
3103                         rx_buffer_info->skb = NULL;
3104                         do {
3105                                 struct sk_buff *this = skb;
3106                                 skb = skb->prev;
3107                                 dev_kfree_skb(this);
3108                         } while (skb);
3109                 }
3110                 if (!rx_buffer_info->page)
3111                         continue;
3112                 if (rx_buffer_info->page_dma) {
3113                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
3114                                        PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
3115                         rx_buffer_info->page_dma = 0;
3116                 }
3117                 put_page(rx_buffer_info->page);
3118                 rx_buffer_info->page = NULL;
3119                 rx_buffer_info->page_offset = 0;
3120         }
3121
3122         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3123         memset(rx_ring->rx_buffer_info, 0, size);
3124
3125         /* Zero out the descriptor ring */
3126         memset(rx_ring->desc, 0, rx_ring->size);
3127
3128         rx_ring->next_to_clean = 0;
3129         rx_ring->next_to_use = 0;
3130
3131         if (rx_ring->head)
3132                 writel(0, adapter->hw.hw_addr + rx_ring->head);
3133         if (rx_ring->tail)
3134                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
3135 }
3136
3137 /**
3138  * ixgbe_clean_tx_ring - Free Tx Buffers
3139  * @adapter: board private structure
3140  * @tx_ring: ring to be cleaned
3141  **/
3142 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
3143                                 struct ixgbe_ring *tx_ring)
3144 {
3145         struct ixgbe_tx_buffer *tx_buffer_info;
3146         unsigned long size;
3147         unsigned int i;
3148
3149         /* Free all the Tx ring sk_buffs */
3150
3151         for (i = 0; i < tx_ring->count; i++) {
3152                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3153                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3154         }
3155
3156         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3157         memset(tx_ring->tx_buffer_info, 0, size);
3158
3159         /* Zero out the descriptor ring */
3160         memset(tx_ring->desc, 0, tx_ring->size);
3161
3162         tx_ring->next_to_use = 0;
3163         tx_ring->next_to_clean = 0;
3164
3165         if (tx_ring->head)
3166                 writel(0, adapter->hw.hw_addr + tx_ring->head);
3167         if (tx_ring->tail)
3168                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
3169 }
3170
3171 /**
3172  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3173  * @adapter: board private structure
3174  **/
3175 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3176 {
3177         int i;
3178
3179         for (i = 0; i < adapter->num_rx_queues; i++)
3180                 ixgbe_clean_rx_ring(adapter, adapter->rx_ring[i]);
3181 }
3182
3183 /**
3184  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3185  * @adapter: board private structure
3186  **/
3187 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3188 {
3189         int i;
3190
3191         for (i = 0; i < adapter->num_tx_queues; i++)
3192                 ixgbe_clean_tx_ring(adapter, adapter->tx_ring[i]);
3193 }
3194
3195 void ixgbe_down(struct ixgbe_adapter *adapter)
3196 {
3197         struct net_device *netdev = adapter->netdev;
3198         struct ixgbe_hw *hw = &adapter->hw;
3199         u32 rxctrl;
3200         u32 txdctl;
3201         int i, j;
3202
3203         /* signal that we are down to the interrupt handler */
3204         set_bit(__IXGBE_DOWN, &adapter->state);
3205
3206         /* disable receive for all VFs and wait one second */
3207         if (adapter->num_vfs) {
3208                 for (i = 0 ; i < adapter->num_vfs; i++)
3209                         adapter->vfinfo[i].clear_to_send = 0;
3210
3211                 /* ping all the active vfs to let them know we are going down */
3212                 ixgbe_ping_all_vfs(adapter);
3213                 /* Disable all VFTE/VFRE TX/RX */
3214                 ixgbe_disable_tx_rx(adapter);
3215         }
3216
3217         /* disable receives */
3218         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3219         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3220
3221         netif_tx_disable(netdev);
3222
3223         IXGBE_WRITE_FLUSH(hw);
3224         msleep(10);
3225
3226         netif_tx_stop_all_queues(netdev);
3227
3228         ixgbe_irq_disable(adapter);
3229
3230         ixgbe_napi_disable_all(adapter);
3231
3232         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3233         del_timer_sync(&adapter->sfp_timer);
3234         del_timer_sync(&adapter->watchdog_timer);
3235         cancel_work_sync(&adapter->watchdog_task);
3236
3237         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3238             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3239                 cancel_work_sync(&adapter->fdir_reinit_task);
3240
3241         /* disable transmits in the hardware now that interrupts are off */
3242         for (i = 0; i < adapter->num_tx_queues; i++) {
3243                 j = adapter->tx_ring[i]->reg_idx;
3244                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3245                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3246                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3247         }
3248         /* Disable the Tx DMA engine on 82599 */
3249         if (hw->mac.type == ixgbe_mac_82599EB)
3250                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3251                                 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3252                                  ~IXGBE_DMATXCTL_TE));
3253
3254         netif_carrier_off(netdev);
3255
3256         /* clear n-tuple filters that are cached */
3257         ethtool_ntuple_flush(netdev);
3258
3259         if (!pci_channel_offline(adapter->pdev))
3260                 ixgbe_reset(adapter);
3261         ixgbe_clean_all_tx_rings(adapter);
3262         ixgbe_clean_all_rx_rings(adapter);
3263
3264 #ifdef CONFIG_IXGBE_DCA
3265         /* since we reset the hardware DCA settings were cleared */
3266         ixgbe_setup_dca(adapter);
3267 #endif
3268 }
3269
3270 /**
3271  * ixgbe_poll - NAPI Rx polling callback
3272  * @napi: structure for representing this polling device
3273  * @budget: how many packets driver is allowed to clean
3274  *
3275  * This function is used for legacy and MSI, NAPI mode
3276  **/
3277 static int ixgbe_poll(struct napi_struct *napi, int budget)
3278 {
3279         struct ixgbe_q_vector *q_vector =
3280                                 container_of(napi, struct ixgbe_q_vector, napi);
3281         struct ixgbe_adapter *adapter = q_vector->adapter;
3282         int tx_clean_complete, work_done = 0;
3283
3284 #ifdef CONFIG_IXGBE_DCA
3285         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3286                 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3287                 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3288         }
3289 #endif
3290
3291         tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3292         ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3293
3294         if (!tx_clean_complete)
3295                 work_done = budget;
3296
3297         /* If budget not fully consumed, exit the polling mode */
3298         if (work_done < budget) {
3299                 napi_complete(napi);
3300                 if (adapter->rx_itr_setting & 1)
3301                         ixgbe_set_itr(adapter);
3302                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3303                         ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3304         }
3305         return work_done;
3306 }
3307
3308 /**
3309  * ixgbe_tx_timeout - Respond to a Tx Hang
3310  * @netdev: network interface device structure
3311  **/
3312 static void ixgbe_tx_timeout(struct net_device *netdev)
3313 {
3314         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3315
3316         /* Do the reset outside of interrupt context */
3317         schedule_work(&adapter->reset_task);
3318 }
3319
3320 static void ixgbe_reset_task(struct work_struct *work)
3321 {
3322         struct ixgbe_adapter *adapter;
3323         adapter = container_of(work, struct ixgbe_adapter, reset_task);
3324
3325         /* If we're already down or resetting, just bail */
3326         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3327             test_bit(__IXGBE_RESETTING, &adapter->state))
3328                 return;
3329
3330         adapter->tx_timeout_count++;
3331
3332         ixgbe_reinit_locked(adapter);
3333 }
3334
3335 #ifdef CONFIG_IXGBE_DCB
3336 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3337 {
3338         bool ret = false;
3339         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3340
3341         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3342                 return ret;
3343
3344         f->mask = 0x7 << 3;
3345         adapter->num_rx_queues = f->indices;
3346         adapter->num_tx_queues = f->indices;
3347         ret = true;
3348
3349         return ret;
3350 }
3351 #endif
3352
3353 /**
3354  * ixgbe_set_rss_queues: Allocate queues for RSS
3355  * @adapter: board private structure to initialize
3356  *
3357  * This is our "base" multiqueue mode.  RSS (Receive Side Scaling) will try
3358  * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3359  *
3360  **/
3361 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3362 {
3363         bool ret = false;
3364         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3365
3366         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3367                 f->mask = 0xF;
3368                 adapter->num_rx_queues = f->indices;
3369                 adapter->num_tx_queues = f->indices;
3370                 ret = true;
3371         } else {
3372                 ret = false;
3373         }
3374
3375         return ret;
3376 }
3377
3378 /**
3379  * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3380  * @adapter: board private structure to initialize
3381  *
3382  * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3383  * to the original CPU that initiated the Tx session.  This runs in addition
3384  * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3385  * Rx load across CPUs using RSS.
3386  *
3387  **/
3388 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3389 {
3390         bool ret = false;
3391         struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3392
3393         f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3394         f_fdir->mask = 0;
3395
3396         /* Flow Director must have RSS enabled */
3397         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3398             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3399              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3400                 adapter->num_tx_queues = f_fdir->indices;
3401                 adapter->num_rx_queues = f_fdir->indices;
3402                 ret = true;
3403         } else {
3404                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3405                 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3406         }
3407         return ret;
3408 }
3409
3410 #ifdef IXGBE_FCOE
3411 /**
3412  * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3413  * @adapter: board private structure to initialize
3414  *
3415  * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3416  * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3417  * rx queues out of the max number of rx queues, instead, it is used as the
3418  * index of the first rx queue used by FCoE.
3419  *
3420  **/
3421 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3422 {
3423         bool ret = false;
3424         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3425
3426         f->indices = min((int)num_online_cpus(), f->indices);
3427         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3428                 adapter->num_rx_queues = 1;
3429                 adapter->num_tx_queues = 1;
3430 #ifdef CONFIG_IXGBE_DCB
3431                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3432                         DPRINTK(PROBE, INFO, "FCoE enabled with DCB \n");
3433                         ixgbe_set_dcb_queues(adapter);
3434                 }
3435 #endif
3436                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3437                         DPRINTK(PROBE, INFO, "FCoE enabled with RSS \n");
3438                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3439                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3440                                 ixgbe_set_fdir_queues(adapter);
3441                         else
3442                                 ixgbe_set_rss_queues(adapter);
3443                 }
3444                 /* adding FCoE rx rings to the end */
3445                 f->mask = adapter->num_rx_queues;
3446                 adapter->num_rx_queues += f->indices;
3447                 adapter->num_tx_queues += f->indices;
3448
3449                 ret = true;
3450         }
3451
3452         return ret;
3453 }
3454
3455 #endif /* IXGBE_FCOE */
3456 /**
3457  * ixgbe_set_sriov_queues: Allocate queues for IOV use
3458  * @adapter: board private structure to initialize
3459  *
3460  * IOV doesn't actually use anything, so just NAK the
3461  * request for now and let the other queue routines
3462  * figure out what to do.
3463  */
3464 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
3465 {
3466         return false;
3467 }
3468
3469 /*
3470  * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3471  * @adapter: board private structure to initialize
3472  *
3473  * This is the top level queue allocation routine.  The order here is very
3474  * important, starting with the "most" number of features turned on at once,
3475  * and ending with the smallest set of features.  This way large combinations
3476  * can be allocated if they're turned on, and smaller combinations are the
3477  * fallthrough conditions.
3478  *
3479  **/
3480 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3481 {
3482         /* Start with base case */
3483         adapter->num_rx_queues = 1;
3484         adapter->num_tx_queues = 1;
3485         adapter->num_rx_pools = adapter->num_rx_queues;
3486         adapter->num_rx_queues_per_pool = 1;
3487
3488         if (ixgbe_set_sriov_queues(adapter))
3489                 return;
3490
3491 #ifdef IXGBE_FCOE
3492         if (ixgbe_set_fcoe_queues(adapter))
3493                 goto done;
3494
3495 #endif /* IXGBE_FCOE */
3496 #ifdef CONFIG_IXGBE_DCB
3497         if (ixgbe_set_dcb_queues(adapter))
3498                 goto done;
3499
3500 #endif
3501         if (ixgbe_set_fdir_queues(adapter))
3502                 goto done;
3503
3504         if (ixgbe_set_rss_queues(adapter))
3505                 goto done;
3506
3507         /* fallback to base case */
3508         adapter->num_rx_queues = 1;
3509         adapter->num_tx_queues = 1;
3510
3511 done:
3512         /* Notify the stack of the (possibly) reduced Tx Queue count. */
3513         adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3514 }
3515
3516 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3517                                        int vectors)
3518 {
3519         int err, vector_threshold;
3520
3521         /* We'll want at least 3 (vector_threshold):
3522          * 1) TxQ[0] Cleanup
3523          * 2) RxQ[0] Cleanup
3524          * 3) Other (Link Status Change, etc.)
3525          * 4) TCP Timer (optional)
3526          */
3527         vector_threshold = MIN_MSIX_COUNT;
3528
3529         /* The more we get, the more we will assign to Tx/Rx Cleanup
3530          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3531          * Right now, we simply care about how many we'll get; we'll
3532          * set them up later while requesting irq's.
3533          */
3534         while (vectors >= vector_threshold) {
3535                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3536                                       vectors);
3537                 if (!err) /* Success in acquiring all requested vectors. */
3538                         break;
3539                 else if (err < 0)
3540                         vectors = 0; /* Nasty failure, quit now */
3541                 else /* err == number of vectors we should try again with */
3542                         vectors = err;
3543         }
3544
3545         if (vectors < vector_threshold) {
3546                 /* Can't allocate enough MSI-X interrupts?  Oh well.
3547                  * This just means we'll go with either a single MSI
3548                  * vector or fall back to legacy interrupts.
3549                  */
3550                 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3551                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3552                 kfree(adapter->msix_entries);
3553                 adapter->msix_entries = NULL;
3554         } else {
3555                 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3556                 /*
3557                  * Adjust for only the vectors we'll use, which is minimum
3558                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3559                  * vectors we were allocated.
3560                  */
3561                 adapter->num_msix_vectors = min(vectors,
3562                                    adapter->max_msix_q_vectors + NON_Q_VECTORS);
3563         }
3564 }
3565
3566 /**
3567  * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3568  * @adapter: board private structure to initialize
3569  *
3570  * Cache the descriptor ring offsets for RSS to the assigned rings.
3571  *
3572  **/
3573 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3574 {
3575         int i;
3576         bool ret = false;
3577
3578         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3579                 for (i = 0; i < adapter->num_rx_queues; i++)
3580                         adapter->rx_ring[i]->reg_idx = i;
3581                 for (i = 0; i < adapter->num_tx_queues; i++)
3582                         adapter->tx_ring[i]->reg_idx = i;
3583                 ret = true;
3584         } else {
3585                 ret = false;
3586         }
3587
3588         return ret;
3589 }
3590
3591 #ifdef CONFIG_IXGBE_DCB
3592 /**
3593  * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3594  * @adapter: board private structure to initialize
3595  *
3596  * Cache the descriptor ring offsets for DCB to the assigned rings.
3597  *
3598  **/
3599 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3600 {
3601         int i;
3602         bool ret = false;
3603         int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3604
3605         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3606                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3607                         /* the number of queues is assumed to be symmetric */
3608                         for (i = 0; i < dcb_i; i++) {
3609                                 adapter->rx_ring[i]->reg_idx = i << 3;
3610                                 adapter->tx_ring[i]->reg_idx = i << 2;
3611                         }
3612                         ret = true;
3613                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3614                         if (dcb_i == 8) {
3615                                 /*
3616                                  * Tx TC0 starts at: descriptor queue 0
3617                                  * Tx TC1 starts at: descriptor queue 32
3618                                  * Tx TC2 starts at: descriptor queue 64
3619                                  * Tx TC3 starts at: descriptor queue 80
3620                                  * Tx TC4 starts at: descriptor queue 96
3621                                  * Tx TC5 starts at: descriptor queue 104
3622                                  * Tx TC6 starts at: descriptor queue 112
3623                                  * Tx TC7 starts at: descriptor queue 120
3624                                  *
3625                                  * Rx TC0-TC7 are offset by 16 queues each
3626                                  */
3627                                 for (i = 0; i < 3; i++) {
3628                                         adapter->tx_ring[i]->reg_idx = i << 5;
3629                                         adapter->rx_ring[i]->reg_idx = i << 4;
3630                                 }
3631                                 for ( ; i < 5; i++) {
3632                                         adapter->tx_ring[i]->reg_idx =
3633                                                                  ((i + 2) << 4);
3634                                         adapter->rx_ring[i]->reg_idx = i << 4;
3635                                 }
3636                                 for ( ; i < dcb_i; i++) {
3637                                         adapter->tx_ring[i]->reg_idx =
3638                                                                  ((i + 8) << 3);
3639                                         adapter->rx_ring[i]->reg_idx = i << 4;
3640                                 }
3641
3642                                 ret = true;
3643                         } else if (dcb_i == 4) {
3644                                 /*
3645                                  * Tx TC0 starts at: descriptor queue 0
3646                                  * Tx TC1 starts at: descriptor queue 64
3647                                  * Tx TC2 starts at: descriptor queue 96
3648                                  * Tx TC3 starts at: descriptor queue 112
3649                                  *
3650                                  * Rx TC0-TC3 are offset by 32 queues each
3651                                  */
3652                                 adapter->tx_ring[0]->reg_idx = 0;
3653                                 adapter->tx_ring[1]->reg_idx = 64;
3654                                 adapter->tx_ring[2]->reg_idx = 96;
3655                                 adapter->tx_ring[3]->reg_idx = 112;
3656                                 for (i = 0 ; i < dcb_i; i++)
3657                                         adapter->rx_ring[i]->reg_idx = i << 5;
3658
3659                                 ret = true;
3660                         } else {
3661                                 ret = false;
3662                         }
3663                 } else {
3664                         ret = false;
3665                 }
3666         } else {
3667                 ret = false;
3668         }
3669
3670         return ret;
3671 }
3672 #endif
3673
3674 /**
3675  * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3676  * @adapter: board private structure to initialize
3677  *
3678  * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3679  *
3680  **/
3681 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3682 {
3683         int i;
3684         bool ret = false;
3685
3686         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3687             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3688              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3689                 for (i = 0; i < adapter->num_rx_queues; i++)
3690                         adapter->rx_ring[i]->reg_idx = i;
3691                 for (i = 0; i < adapter->num_tx_queues; i++)
3692                         adapter->tx_ring[i]->reg_idx = i;
3693                 ret = true;
3694         }
3695
3696         return ret;
3697 }
3698
3699 #ifdef IXGBE_FCOE
3700 /**
3701  * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3702  * @adapter: board private structure to initialize
3703  *
3704  * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3705  *
3706  */
3707 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3708 {
3709         int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
3710         bool ret = false;
3711         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3712
3713         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3714 #ifdef CONFIG_IXGBE_DCB
3715                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3716                         struct ixgbe_fcoe *fcoe = &adapter->fcoe;
3717
3718                         ixgbe_cache_ring_dcb(adapter);
3719                         /* find out queues in TC for FCoE */
3720                         fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
3721                         fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
3722                         /*
3723                          * In 82599, the number of Tx queues for each traffic
3724                          * class for both 8-TC and 4-TC modes are:
3725                          * TCs  : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
3726                          * 8 TCs:  32  32  16  16   8   8   8   8
3727                          * 4 TCs:  64  64  32  32
3728                          * We have max 8 queues for FCoE, where 8 the is
3729                          * FCoE redirection table size. If TC for FCoE is
3730                          * less than or equal to TC3, we have enough queues
3731                          * to add max of 8 queues for FCoE, so we start FCoE
3732                          * tx descriptor from the next one, i.e., reg_idx + 1.
3733                          * If TC for FCoE is above TC3, implying 8 TC mode,
3734                          * and we need 8 for FCoE, we have to take all queues
3735                          * in that traffic class for FCoE.
3736                          */
3737                         if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
3738                                 fcoe_tx_i--;
3739                 }
3740 #endif /* CONFIG_IXGBE_DCB */
3741                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3742                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3743                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3744                                 ixgbe_cache_ring_fdir(adapter);
3745                         else
3746                                 ixgbe_cache_ring_rss(adapter);
3747
3748                         fcoe_rx_i = f->mask;
3749                         fcoe_tx_i = f->mask;
3750                 }
3751                 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
3752                         adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
3753                         adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
3754                 }
3755                 ret = true;
3756         }
3757         return ret;
3758 }
3759
3760 #endif /* IXGBE_FCOE */
3761 /**
3762  * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
3763  * @adapter: board private structure to initialize
3764  *
3765  * SR-IOV doesn't use any descriptor rings but changes the default if
3766  * no other mapping is used.
3767  *
3768  */
3769 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
3770 {
3771         adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
3772         adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
3773         if (adapter->num_vfs)
3774                 return true;
3775         else
3776                 return false;
3777 }
3778
3779 /**
3780  * ixgbe_cache_ring_register - Descriptor ring to register mapping
3781  * @adapter: board private structure to initialize
3782  *
3783  * Once we know the feature-set enabled for the device, we'll cache
3784  * the register offset the descriptor ring is assigned to.
3785  *
3786  * Note, the order the various feature calls is important.  It must start with
3787  * the "most" features enabled at the same time, then trickle down to the
3788  * least amount of features turned on at once.
3789  **/
3790 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3791 {
3792         /* start with default case */
3793         adapter->rx_ring[0]->reg_idx = 0;
3794         adapter->tx_ring[0]->reg_idx = 0;
3795
3796         if (ixgbe_cache_ring_sriov(adapter))
3797                 return;
3798
3799 #ifdef IXGBE_FCOE
3800         if (ixgbe_cache_ring_fcoe(adapter))
3801                 return;
3802
3803 #endif /* IXGBE_FCOE */
3804 #ifdef CONFIG_IXGBE_DCB
3805         if (ixgbe_cache_ring_dcb(adapter))
3806                 return;
3807
3808 #endif
3809         if (ixgbe_cache_ring_fdir(adapter))
3810                 return;
3811
3812         if (ixgbe_cache_ring_rss(adapter))
3813                 return;
3814 }
3815
3816 /**
3817  * ixgbe_alloc_queues - Allocate memory for all rings
3818  * @adapter: board private structure to initialize
3819  *
3820  * We allocate one ring per queue at run-time since we don't know the
3821  * number of queues at compile-time.  The polling_netdev array is
3822  * intended for Multiqueue, but should work fine with a single queue.
3823  **/
3824 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3825 {
3826         int i;
3827         int orig_node = adapter->node;
3828
3829         for (i = 0; i < adapter->num_tx_queues; i++) {
3830                 struct ixgbe_ring *ring = adapter->tx_ring[i];
3831                 if (orig_node == -1) {
3832                         int cur_node = next_online_node(adapter->node);
3833                         if (cur_node == MAX_NUMNODES)
3834                                 cur_node = first_online_node;
3835                         adapter->node = cur_node;
3836                 }
3837                 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
3838                                     adapter->node);
3839                 if (!ring)
3840                         ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
3841                 if (!ring)
3842                         goto err_tx_ring_allocation;
3843                 ring->count = adapter->tx_ring_count;
3844                 ring->queue_index = i;
3845                 ring->numa_node = adapter->node;
3846
3847                 adapter->tx_ring[i] = ring;
3848         }
3849
3850         /* Restore the adapter's original node */
3851         adapter->node = orig_node;
3852
3853         for (i = 0; i < adapter->num_rx_queues; i++) {
3854                 struct ixgbe_ring *ring = adapter->rx_ring[i];
3855                 if (orig_node == -1) {
3856                         int cur_node = next_online_node(adapter->node);
3857                         if (cur_node == MAX_NUMNODES)
3858                                 cur_node = first_online_node;
3859                         adapter->node = cur_node;
3860                 }
3861                 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
3862                                     adapter->node);
3863                 if (!ring)
3864                         ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
3865                 if (!ring)
3866                         goto err_rx_ring_allocation;
3867                 ring->count = adapter->rx_ring_count;
3868                 ring->queue_index = i;
3869                 ring->numa_node = adapter->node;
3870
3871                 adapter->rx_ring[i] = ring;
3872         }
3873
3874         /* Restore the adapter's original node */
3875         adapter->node = orig_node;
3876
3877         ixgbe_cache_ring_register(adapter);
3878
3879         return 0;
3880
3881 err_rx_ring_allocation:
3882         for (i = 0; i < adapter->num_tx_queues; i++)
3883                 kfree(adapter->tx_ring[i]);
3884 err_tx_ring_allocation:
3885         return -ENOMEM;
3886 }
3887
3888 /**
3889  * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3890  * @adapter: board private structure to initialize
3891  *
3892  * Attempt to configure the interrupts using the best available
3893  * capabilities of the hardware and the kernel.
3894  **/
3895 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3896 {
3897         struct ixgbe_hw *hw = &adapter->hw;
3898         int err = 0;
3899         int vector, v_budget;
3900
3901         /*
3902          * It's easy to be greedy for MSI-X vectors, but it really
3903          * doesn't do us much good if we have a lot more vectors
3904          * than CPU's.  So let's be conservative and only ask for
3905          * (roughly) the same number of vectors as there are CPU's.
3906          */
3907         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3908                        (int)num_online_cpus()) + NON_Q_VECTORS;
3909
3910         /*
3911          * At the same time, hardware can only support a maximum of
3912          * hw.mac->max_msix_vectors vectors.  With features
3913          * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3914          * descriptor queues supported by our device.  Thus, we cap it off in
3915          * those rare cases where the cpu count also exceeds our vector limit.
3916          */
3917         v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3918
3919         /* A failure in MSI-X entry allocation isn't fatal, but it does
3920          * mean we disable MSI-X capabilities of the adapter. */
3921         adapter->msix_entries = kcalloc(v_budget,
3922                                         sizeof(struct msix_entry), GFP_KERNEL);
3923         if (adapter->msix_entries) {
3924                 for (vector = 0; vector < v_budget; vector++)
3925                         adapter->msix_entries[vector].entry = vector;
3926
3927                 ixgbe_acquire_msix_vectors(adapter, v_budget);
3928
3929                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3930                         goto out;
3931         }
3932
3933         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3934         adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3935         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3936         adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3937         adapter->atr_sample_rate = 0;
3938         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3939                 ixgbe_disable_sriov(adapter);
3940
3941         ixgbe_set_num_queues(adapter);
3942
3943         err = pci_enable_msi(adapter->pdev);
3944         if (!err) {
3945                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3946         } else {
3947                 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3948                         "falling back to legacy.  Error: %d\n", err);
3949                 /* reset err */
3950                 err = 0;
3951         }
3952
3953 out:
3954         return err;
3955 }
3956
3957 /**
3958  * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3959  * @adapter: board private structure to initialize
3960  *
3961  * We allocate one q_vector per queue interrupt.  If allocation fails we
3962  * return -ENOMEM.
3963  **/
3964 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3965 {
3966         int q_idx, num_q_vectors;
3967         struct ixgbe_q_vector *q_vector;
3968         int napi_vectors;
3969         int (*poll)(struct napi_struct *, int);
3970
3971         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3972                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3973                 napi_vectors = adapter->num_rx_queues;
3974                 poll = &ixgbe_clean_rxtx_many;
3975         } else {
3976                 num_q_vectors = 1;
3977                 napi_vectors = 1;
3978                 poll = &ixgbe_poll;
3979         }
3980
3981         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3982                 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
3983                                         GFP_KERNEL, adapter->node);
3984                 if (!q_vector)
3985                         q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
3986                                            GFP_KERNEL);
3987                 if (!q_vector)
3988                         goto err_out;
3989                 q_vector->adapter = adapter;
3990                 if (q_vector->txr_count && !q_vector->rxr_count)
3991                         q_vector->eitr = adapter->tx_eitr_param;
3992                 else
3993                         q_vector->eitr = adapter->rx_eitr_param;
3994                 q_vector->v_idx = q_idx;
3995                 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3996                 adapter->q_vector[q_idx] = q_vector;
3997         }
3998
3999         return 0;
4000
4001 err_out:
4002         while (q_idx) {
4003                 q_idx--;
4004                 q_vector = adapter->q_vector[q_idx];
4005                 netif_napi_del(&q_vector->napi);
4006                 kfree(q_vector);
4007                 adapter->q_vector[q_idx] = NULL;
4008         }
4009         return -ENOMEM;
4010 }
4011
4012 /**
4013  * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4014  * @adapter: board private structure to initialize
4015  *
4016  * This function frees the memory allocated to the q_vectors.  In addition if
4017  * NAPI is enabled it will delete any references to the NAPI struct prior
4018  * to freeing the q_vector.
4019  **/
4020 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4021 {
4022         int q_idx, num_q_vectors;
4023
4024         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4025                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4026         else
4027                 num_q_vectors = 1;
4028
4029         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4030                 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4031                 adapter->q_vector[q_idx] = NULL;
4032                 netif_napi_del(&q_vector->napi);
4033                 kfree(q_vector);
4034         }
4035 }
4036
4037 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4038 {
4039         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4040                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4041                 pci_disable_msix(adapter->pdev);
4042                 kfree(adapter->msix_entries);
4043                 adapter->msix_entries = NULL;
4044         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4045                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4046                 pci_disable_msi(adapter->pdev);
4047         }
4048         return;
4049 }
4050
4051 /**
4052  * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4053  * @adapter: board private structure to initialize
4054  *
4055  * We determine which interrupt scheme to use based on...
4056  * - Kernel support (MSI, MSI-X)
4057  *   - which can be user-defined (via MODULE_PARAM)
4058  * - Hardware queue count (num_*_queues)
4059  *   - defined by miscellaneous hardware support/features (RSS, etc.)
4060  **/
4061 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4062 {
4063         int err;
4064
4065         /* Number of supported queues */
4066         ixgbe_set_num_queues(adapter);
4067
4068         err = ixgbe_set_interrupt_capability(adapter);
4069         if (err) {
4070                 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
4071                 goto err_set_interrupt;
4072         }
4073
4074         err = ixgbe_alloc_q_vectors(adapter);
4075         if (err) {
4076                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
4077                         "vectors\n");
4078                 goto err_alloc_q_vectors;
4079         }
4080
4081         err = ixgbe_alloc_queues(adapter);
4082         if (err) {
4083                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
4084                 goto err_alloc_queues;
4085         }
4086
4087         DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
4088                 "Tx Queue count = %u\n",
4089                 (adapter->num_rx_queues > 1) ? "Enabled" :
4090                 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
4091
4092         set_bit(__IXGBE_DOWN, &adapter->state);
4093
4094         return 0;
4095
4096 err_alloc_queues:
4097         ixgbe_free_q_vectors(adapter);
4098 err_alloc_q_vectors:
4099         ixgbe_reset_interrupt_capability(adapter);
4100 err_set_interrupt:
4101         return err;
4102 }
4103
4104 /**
4105  * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4106  * @adapter: board private structure to clear interrupt scheme on
4107  *
4108  * We go through and clear interrupt specific resources and reset the structure
4109  * to pre-load conditions
4110  **/
4111 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4112 {
4113         int i;
4114
4115         for (i = 0; i < adapter->num_tx_queues; i++) {
4116                 kfree(adapter->tx_ring[i]);
4117                 adapter->tx_ring[i] = NULL;
4118         }
4119         for (i = 0; i < adapter->num_rx_queues; i++) {
4120                 kfree(adapter->rx_ring[i]);
4121                 adapter->rx_ring[i] = NULL;
4122         }
4123
4124         ixgbe_free_q_vectors(adapter);
4125         ixgbe_reset_interrupt_capability(adapter);
4126 }
4127
4128 /**
4129  * ixgbe_sfp_timer - worker thread to find a missing module
4130  * @data: pointer to our adapter struct
4131  **/
4132 static void ixgbe_sfp_timer(unsigned long data)
4133 {
4134         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4135
4136         /*
4137          * Do the sfp_timer outside of interrupt context due to the
4138          * delays that sfp+ detection requires
4139          */
4140         schedule_work(&adapter->sfp_task);
4141 }
4142
4143 /**
4144  * ixgbe_sfp_task - worker thread to find a missing module
4145  * @work: pointer to work_struct containing our data
4146  **/
4147 static void ixgbe_sfp_task(struct work_struct *work)
4148 {
4149         struct ixgbe_adapter *adapter = container_of(work,
4150                                                      struct ixgbe_adapter,
4151                                                      sfp_task);
4152         struct ixgbe_hw *hw = &adapter->hw;
4153
4154         if ((hw->phy.type == ixgbe_phy_nl) &&
4155             (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4156                 s32 ret = hw->phy.ops.identify_sfp(hw);
4157                 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4158                         goto reschedule;
4159                 ret = hw->phy.ops.reset(hw);
4160                 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4161                         dev_err(&adapter->pdev->dev, "failed to initialize "
4162                                 "because an unsupported SFP+ module type "
4163                                 "was detected.\n"
4164                                 "Reload the driver after installing a "
4165                                 "supported module.\n");
4166                         unregister_netdev(adapter->netdev);
4167                 } else {
4168                         DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
4169                                 hw->phy.sfp_type);
4170                 }
4171                 /* don't need this routine any more */
4172                 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4173         }
4174         return;
4175 reschedule:
4176         if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4177                 mod_timer(&adapter->sfp_timer,
4178                           round_jiffies(jiffies + (2 * HZ)));
4179 }
4180
4181 /**
4182  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4183  * @adapter: board private structure to initialize
4184  *
4185  * ixgbe_sw_init initializes the Adapter private data structure.
4186  * Fields are initialized based on PCI device information and
4187  * OS network device settings (MTU size).
4188  **/
4189 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4190 {
4191         struct ixgbe_hw *hw = &adapter->hw;
4192         struct pci_dev *pdev = adapter->pdev;
4193         struct net_device *dev = adapter->netdev;
4194         unsigned int rss;
4195 #ifdef CONFIG_IXGBE_DCB
4196         int j;
4197         struct tc_configuration *tc;
4198 #endif
4199
4200         /* PCI config space info */
4201
4202         hw->vendor_id = pdev->vendor;
4203         hw->device_id = pdev->device;
4204         hw->revision_id = pdev->revision;
4205         hw->subsystem_vendor_id = pdev->subsystem_vendor;
4206         hw->subsystem_device_id = pdev->subsystem_device;
4207
4208         /* Set capability flags */
4209         rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4210         adapter->ring_feature[RING_F_RSS].indices = rss;
4211         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4212         adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4213         if (hw->mac.type == ixgbe_mac_82598EB) {
4214                 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4215                         adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4216                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4217         } else if (hw->mac.type == ixgbe_mac_82599EB) {
4218                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4219                 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4220                 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4221                 if (dev->features & NETIF_F_NTUPLE) {
4222                         /* Flow Director perfect filter enabled */
4223                         adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4224                         adapter->atr_sample_rate = 0;
4225                         spin_lock_init(&adapter->fdir_perfect_lock);
4226                 } else {
4227                         /* Flow Director hash filters enabled */
4228                         adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4229                         adapter->atr_sample_rate = 20;
4230                 }
4231                 adapter->ring_feature[RING_F_FDIR].indices =
4232                                                          IXGBE_MAX_FDIR_INDICES;
4233                 adapter->fdir_pballoc = 0;
4234 #ifdef IXGBE_FCOE
4235                 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4236                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4237                 adapter->ring_feature[RING_F_FCOE].indices = 0;
4238 #ifdef CONFIG_IXGBE_DCB
4239                 /* Default traffic class to use for FCoE */
4240                 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4241 #endif
4242 #endif /* IXGBE_FCOE */
4243         }
4244
4245 #ifdef CONFIG_IXGBE_DCB
4246         /* Configure DCB traffic classes */
4247         for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4248                 tc = &adapter->dcb_cfg.tc_config[j];
4249                 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4250                 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4251                 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4252                 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4253                 tc->dcb_pfc = pfc_disabled;
4254         }
4255         adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4256         adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4257         adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4258         adapter->dcb_cfg.pfc_mode_enable = false;
4259         adapter->dcb_cfg.round_robin_enable = false;
4260         adapter->dcb_set_bitmap = 0x00;
4261         ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4262                            adapter->ring_feature[RING_F_DCB].indices);
4263
4264 #endif
4265
4266         /* default flow control settings */
4267         hw->fc.requested_mode = ixgbe_fc_full;
4268         hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
4269 #ifdef CONFIG_DCB
4270         adapter->last_lfc_mode = hw->fc.current_mode;
4271 #endif
4272         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
4273         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
4274         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4275         hw->fc.send_xon = true;
4276         hw->fc.disable_fc_autoneg = false;
4277
4278         /* enable itr by default in dynamic mode */
4279         adapter->rx_itr_setting = 1;
4280         adapter->rx_eitr_param = 20000;
4281         adapter->tx_itr_setting = 1;
4282         adapter->tx_eitr_param = 10000;
4283
4284         /* set defaults for eitr in MegaBytes */
4285         adapter->eitr_low = 10;
4286         adapter->eitr_high = 20;
4287
4288         /* set default ring sizes */
4289         adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4290         adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4291
4292         /* initialize eeprom parameters */
4293         if (ixgbe_init_eeprom_params_generic(hw)) {
4294                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
4295                 return -EIO;
4296         }
4297
4298         /* enable rx csum by default */
4299         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4300
4301         /* get assigned NUMA node */
4302         adapter->node = dev_to_node(&pdev->dev);
4303
4304         set_bit(__IXGBE_DOWN, &adapter->state);
4305
4306         return 0;
4307 }
4308
4309 /**
4310  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4311  * @adapter: board private structure
4312  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
4313  *
4314  * Return 0 on success, negative on failure
4315  **/
4316 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4317                              struct ixgbe_ring *tx_ring)
4318 {
4319         struct pci_dev *pdev = adapter->pdev;
4320         int size;
4321
4322         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4323         tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4324         if (!tx_ring->tx_buffer_info)
4325                 tx_ring->tx_buffer_info = vmalloc(size);
4326         if (!tx_ring->tx_buffer_info)
4327                 goto err;
4328         memset(tx_ring->tx_buffer_info, 0, size);
4329
4330         /* round up to nearest 4K */
4331         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4332         tx_ring->size = ALIGN(tx_ring->size, 4096);
4333
4334         tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
4335                                              &tx_ring->dma);
4336         if (!tx_ring->desc)
4337                 goto err;
4338
4339         tx_ring->next_to_use = 0;
4340         tx_ring->next_to_clean = 0;
4341         tx_ring->work_limit = tx_ring->count;
4342         return 0;
4343
4344 err:
4345         vfree(tx_ring->tx_buffer_info);
4346         tx_ring->tx_buffer_info = NULL;
4347         DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
4348                             "descriptor ring\n");
4349         return -ENOMEM;
4350 }
4351
4352 /**
4353  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4354  * @adapter: board private structure
4355  *
4356  * If this function returns with an error, then it's possible one or
4357  * more of the rings is populated (while the rest are not).  It is the
4358  * callers duty to clean those orphaned rings.
4359  *
4360  * Return 0 on success, negative on failure
4361  **/
4362 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4363 {
4364         int i, err = 0;
4365
4366         for (i = 0; i < adapter->num_tx_queues; i++) {
4367                 err = ixgbe_setup_tx_resources(adapter, adapter->tx_ring[i]);
4368                 if (!err)
4369                         continue;
4370                 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
4371                 break;
4372         }
4373
4374         return err;
4375 }
4376
4377 /**
4378  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4379  * @adapter: board private structure
4380  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
4381  *
4382  * Returns 0 on success, negative on failure
4383  **/
4384 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4385                              struct ixgbe_ring *rx_ring)
4386 {
4387         struct pci_dev *pdev = adapter->pdev;
4388         int size;
4389
4390         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4391         rx_ring->rx_buffer_info = vmalloc_node(size, adapter->node);
4392         if (!rx_ring->rx_buffer_info)
4393                 rx_ring->rx_buffer_info = vmalloc(size);
4394         if (!rx_ring->rx_buffer_info) {
4395                 DPRINTK(PROBE, ERR,
4396                         "vmalloc allocation failed for the rx desc ring\n");
4397                 goto alloc_failed;
4398         }
4399         memset(rx_ring->rx_buffer_info, 0, size);
4400
4401         /* Round up to nearest 4K */
4402         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4403         rx_ring->size = ALIGN(rx_ring->size, 4096);
4404
4405         rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
4406
4407         if (!rx_ring->desc) {
4408                 DPRINTK(PROBE, ERR,
4409                         "Memory allocation failed for the rx desc ring\n");
4410                 vfree(rx_ring->rx_buffer_info);
4411                 goto alloc_failed;
4412         }
4413
4414         rx_ring->next_to_clean = 0;
4415         rx_ring->next_to_use = 0;
4416
4417         return 0;
4418
4419 alloc_failed:
4420         return -ENOMEM;
4421 }
4422
4423 /**
4424  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4425  * @adapter: board private structure
4426  *
4427  * If this function returns with an error, then it's possible one or
4428  * more of the rings is populated (while the rest are not).  It is the
4429  * callers duty to clean those orphaned rings.
4430  *
4431  * Return 0 on success, negative on failure
4432  **/
4433
4434 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4435 {
4436         int i, err = 0;
4437
4438         for (i = 0; i < adapter->num_rx_queues; i++) {
4439                 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
4440                 if (!err)
4441                         continue;
4442                 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4443                 break;
4444         }
4445
4446         return err;
4447 }
4448
4449 /**
4450  * ixgbe_free_tx_resources - Free Tx Resources per Queue
4451  * @adapter: board private structure
4452  * @tx_ring: Tx descriptor ring for a specific queue
4453  *
4454  * Free all transmit software resources
4455  **/
4456 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4457                              struct ixgbe_ring *tx_ring)
4458 {
4459         struct pci_dev *pdev = adapter->pdev;
4460
4461         ixgbe_clean_tx_ring(adapter, tx_ring);
4462
4463         vfree(tx_ring->tx_buffer_info);
4464         tx_ring->tx_buffer_info = NULL;
4465
4466         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4467
4468         tx_ring->desc = NULL;
4469 }
4470
4471 /**
4472  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4473  * @adapter: board private structure
4474  *
4475  * Free all transmit software resources
4476  **/
4477 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4478 {
4479         int i;
4480
4481         for (i = 0; i < adapter->num_tx_queues; i++)
4482                 if (adapter->tx_ring[i]->desc)
4483                         ixgbe_free_tx_resources(adapter, adapter->tx_ring[i]);
4484 }
4485
4486 /**
4487  * ixgbe_free_rx_resources - Free Rx Resources
4488  * @adapter: board private structure
4489  * @rx_ring: ring to clean the resources from
4490  *
4491  * Free all receive software resources
4492  **/
4493 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4494                              struct ixgbe_ring *rx_ring)
4495 {
4496         struct pci_dev *pdev = adapter->pdev;
4497
4498         ixgbe_clean_rx_ring(adapter, rx_ring);
4499
4500         vfree(rx_ring->rx_buffer_info);
4501         rx_ring->rx_buffer_info = NULL;
4502
4503         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4504
4505         rx_ring->desc = NULL;
4506 }
4507
4508 /**
4509  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4510  * @adapter: board private structure
4511  *
4512  * Free all receive software resources
4513  **/
4514 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4515 {
4516         int i;
4517
4518         for (i = 0; i < adapter->num_rx_queues; i++)
4519                 if (adapter->rx_ring[i]->desc)
4520                         ixgbe_free_rx_resources(adapter, adapter->rx_ring[i]);
4521 }
4522
4523 /**
4524  * ixgbe_change_mtu - Change the Maximum Transfer Unit
4525  * @netdev: network interface device structure
4526  * @new_mtu: new value for maximum frame size
4527  *
4528  * Returns 0 on success, negative on failure
4529  **/
4530 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4531 {
4532         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4533         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4534
4535         /* MTU < 68 is an error and causes problems on some kernels */
4536         if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4537                 return -EINVAL;
4538
4539         DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4540                 netdev->mtu, new_mtu);
4541         /* must set new MTU before calling down or up */
4542         netdev->mtu = new_mtu;
4543
4544         if (netif_running(netdev))
4545                 ixgbe_reinit_locked(adapter);
4546
4547         return 0;
4548 }
4549
4550 /**
4551  * ixgbe_open - Called when a network interface is made active
4552  * @netdev: network interface device structure
4553  *
4554  * Returns 0 on success, negative value on failure
4555  *
4556  * The open entry point is called when a network interface is made
4557  * active by the system (IFF_UP).  At this point all resources needed
4558  * for transmit and receive operations are allocated, the interrupt
4559  * handler is registered with the OS, the watchdog timer is started,
4560  * and the stack is notified that the interface is ready.
4561  **/
4562 static int ixgbe_open(struct net_device *netdev)
4563 {
4564         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4565         int err;
4566
4567         /* disallow open during test */
4568         if (test_bit(__IXGBE_TESTING, &adapter->state))
4569                 return -EBUSY;
4570
4571         netif_carrier_off(netdev);
4572
4573         /* allocate transmit descriptors */
4574         err = ixgbe_setup_all_tx_resources(adapter);
4575         if (err)
4576                 goto err_setup_tx;
4577
4578         /* allocate receive descriptors */
4579         err = ixgbe_setup_all_rx_resources(adapter);
4580         if (err)
4581                 goto err_setup_rx;
4582
4583         ixgbe_configure(adapter);
4584
4585         err = ixgbe_request_irq(adapter);
4586         if (err)
4587                 goto err_req_irq;
4588
4589         err = ixgbe_up_complete(adapter);
4590         if (err)
4591                 goto err_up;
4592
4593         netif_tx_start_all_queues(netdev);
4594
4595         return 0;
4596
4597 err_up:
4598         ixgbe_release_hw_control(adapter);
4599         ixgbe_free_irq(adapter);
4600 err_req_irq:
4601 err_setup_rx:
4602         ixgbe_free_all_rx_resources(adapter);
4603 err_setup_tx:
4604         ixgbe_free_all_tx_resources(adapter);
4605         ixgbe_reset(adapter);
4606
4607         return err;
4608 }
4609
4610 /**
4611  * ixgbe_close - Disables a network interface
4612  * @netdev: network interface device structure
4613  *
4614  * Returns 0, this is not allowed to fail
4615  *
4616  * The close entry point is called when an interface is de-activated
4617  * by the OS.  The hardware is still under the drivers control, but
4618  * needs to be disabled.  A global MAC reset is issued to stop the
4619  * hardware, and all transmit and receive resources are freed.
4620  **/
4621 static int ixgbe_close(struct net_device *netdev)
4622 {
4623         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4624
4625         ixgbe_down(adapter);
4626         ixgbe_free_irq(adapter);
4627
4628         ixgbe_free_all_tx_resources(adapter);
4629         ixgbe_free_all_rx_resources(adapter);
4630
4631         ixgbe_release_hw_control(adapter);
4632
4633         return 0;
4634 }
4635
4636 #ifdef CONFIG_PM
4637 static int ixgbe_resume(struct pci_dev *pdev)
4638 {
4639         struct net_device *netdev = pci_get_drvdata(pdev);
4640         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4641         u32 err;
4642
4643         pci_set_power_state(pdev, PCI_D0);
4644         pci_restore_state(pdev);
4645         /*
4646          * pci_restore_state clears dev->state_saved so call
4647          * pci_save_state to restore it.
4648          */
4649         pci_save_state(pdev);
4650
4651         err = pci_enable_device_mem(pdev);
4652         if (err) {
4653                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4654                                 "suspend\n");
4655                 return err;
4656         }
4657         pci_set_master(pdev);
4658
4659         pci_wake_from_d3(pdev, false);
4660
4661         err = ixgbe_init_interrupt_scheme(adapter);
4662         if (err) {
4663                 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4664                                 "device\n");
4665                 return err;
4666         }
4667
4668         ixgbe_reset(adapter);
4669
4670         IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4671
4672         if (netif_running(netdev)) {
4673                 err = ixgbe_open(adapter->netdev);
4674                 if (err)
4675                         return err;
4676         }
4677
4678         netif_device_attach(netdev);
4679
4680         return 0;
4681 }
4682 #endif /* CONFIG_PM */
4683
4684 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4685 {
4686         struct net_device *netdev = pci_get_drvdata(pdev);
4687         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4688         struct ixgbe_hw *hw = &adapter->hw;
4689         u32 ctrl, fctrl;
4690         u32 wufc = adapter->wol;
4691 #ifdef CONFIG_PM
4692         int retval = 0;
4693 #endif
4694
4695         netif_device_detach(netdev);
4696
4697         if (netif_running(netdev)) {
4698                 ixgbe_down(adapter);
4699                 ixgbe_free_irq(adapter);
4700                 ixgbe_free_all_tx_resources(adapter);
4701                 ixgbe_free_all_rx_resources(adapter);
4702         }
4703         ixgbe_clear_interrupt_scheme(adapter);
4704
4705 #ifdef CONFIG_PM
4706         retval = pci_save_state(pdev);
4707         if (retval)
4708                 return retval;
4709
4710 #endif
4711         if (wufc) {
4712                 ixgbe_set_rx_mode(netdev);
4713
4714                 /* turn on all-multi mode if wake on multicast is enabled */
4715                 if (wufc & IXGBE_WUFC_MC) {
4716                         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4717                         fctrl |= IXGBE_FCTRL_MPE;
4718                         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4719                 }
4720
4721                 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4722                 ctrl |= IXGBE_CTRL_GIO_DIS;
4723                 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4724
4725                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4726         } else {
4727                 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4728                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4729         }
4730
4731         if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4732                 pci_wake_from_d3(pdev, true);
4733         else
4734                 pci_wake_from_d3(pdev, false);
4735
4736         *enable_wake = !!wufc;
4737
4738         ixgbe_release_hw_control(adapter);
4739
4740         pci_disable_device(pdev);
4741
4742         return 0;
4743 }
4744
4745 #ifdef CONFIG_PM
4746 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4747 {
4748         int retval;
4749         bool wake;
4750
4751         retval = __ixgbe_shutdown(pdev, &wake);
4752         if (retval)
4753                 return retval;
4754
4755         if (wake) {
4756                 pci_prepare_to_sleep(pdev);
4757         } else {
4758                 pci_wake_from_d3(pdev, false);
4759                 pci_set_power_state(pdev, PCI_D3hot);
4760         }
4761
4762         return 0;
4763 }
4764 #endif /* CONFIG_PM */
4765
4766 static void ixgbe_shutdown(struct pci_dev *pdev)
4767 {
4768         bool wake;
4769
4770         __ixgbe_shutdown(pdev, &wake);
4771
4772         if (system_state == SYSTEM_POWER_OFF) {
4773                 pci_wake_from_d3(pdev, wake);
4774                 pci_set_power_state(pdev, PCI_D3hot);
4775         }
4776 }
4777
4778 /**
4779  * ixgbe_update_stats - Update the board statistics counters.
4780  * @adapter: board private structure
4781  **/
4782 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4783 {
4784         struct net_device *netdev = adapter->netdev;
4785         struct ixgbe_hw *hw = &adapter->hw;
4786         u64 total_mpc = 0;
4787         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4788         u64 non_eop_descs = 0, restart_queue = 0;
4789
4790         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
4791                 u64 rsc_count = 0;
4792                 u64 rsc_flush = 0;
4793                 for (i = 0; i < 16; i++)
4794                         adapter->hw_rx_no_dma_resources +=
4795                                              IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4796                 for (i = 0; i < adapter->num_rx_queues; i++) {
4797                         rsc_count += adapter->rx_ring[i]->rsc_count;
4798                         rsc_flush += adapter->rx_ring[i]->rsc_flush;
4799                 }
4800                 adapter->rsc_total_count = rsc_count;
4801                 adapter->rsc_total_flush = rsc_flush;
4802         }
4803
4804         /* gather some stats to the adapter struct that are per queue */
4805         for (i = 0; i < adapter->num_tx_queues; i++)
4806                 restart_queue += adapter->tx_ring[i]->restart_queue;
4807         adapter->restart_queue = restart_queue;
4808
4809         for (i = 0; i < adapter->num_rx_queues; i++)
4810                 non_eop_descs += adapter->rx_ring[i]->non_eop_descs;
4811         adapter->non_eop_descs = non_eop_descs;
4812
4813         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4814         for (i = 0; i < 8; i++) {
4815                 /* for packet buffers not used, the register should read 0 */
4816                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4817                 missed_rx += mpc;
4818                 adapter->stats.mpc[i] += mpc;
4819                 total_mpc += adapter->stats.mpc[i];
4820                 if (hw->mac.type == ixgbe_mac_82598EB)
4821                         adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4822                 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4823                 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4824                 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4825                 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4826                 if (hw->mac.type == ixgbe_mac_82599EB) {
4827                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4828                                                             IXGBE_PXONRXCNT(i));
4829                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4830                                                            IXGBE_PXOFFRXCNT(i));
4831                         adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4832                 } else {
4833                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4834                                                               IXGBE_PXONRXC(i));
4835                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4836                                                              IXGBE_PXOFFRXC(i));
4837                 }
4838                 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4839                                                             IXGBE_PXONTXC(i));
4840                 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4841                                                              IXGBE_PXOFFTXC(i));
4842         }
4843         adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4844         /* work around hardware counting issue */
4845         adapter->stats.gprc -= missed_rx;
4846
4847         /* 82598 hardware only has a 32 bit counter in the high register */
4848         if (hw->mac.type == ixgbe_mac_82599EB) {
4849                 u64 tmp;
4850                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4851                 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
4852                 adapter->stats.gorc += (tmp << 32);
4853                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4854                 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
4855                 adapter->stats.gotc += (tmp << 32);
4856                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4857                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4858                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4859                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4860                 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4861                 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4862 #ifdef IXGBE_FCOE
4863                 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4864                 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4865                 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4866                 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4867                 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4868                 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4869 #endif /* IXGBE_FCOE */
4870         } else {
4871                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4872                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4873                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4874                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4875                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4876         }
4877         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4878         adapter->stats.bprc += bprc;
4879         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4880         if (hw->mac.type == ixgbe_mac_82598EB)
4881                 adapter->stats.mprc -= bprc;
4882         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4883         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4884         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4885         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4886         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4887         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4888         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4889         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4890         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4891         adapter->stats.lxontxc += lxon;
4892         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4893         adapter->stats.lxofftxc += lxoff;
4894         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4895         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4896         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4897         /*
4898          * 82598 errata - tx of flow control packets is included in tx counters
4899          */
4900         xon_off_tot = lxon + lxoff;
4901         adapter->stats.gptc -= xon_off_tot;
4902         adapter->stats.mptc -= xon_off_tot;
4903         adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4904         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4905         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4906         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4907         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4908         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4909         adapter->stats.ptc64 -= xon_off_tot;
4910         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4911         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4912         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4913         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4914         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4915         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4916
4917         /* Fill out the OS statistics structure */
4918         netdev->stats.multicast = adapter->stats.mprc;
4919
4920         /* Rx Errors */
4921         netdev->stats.rx_errors = adapter->stats.crcerrs +
4922                                        adapter->stats.rlec;
4923         netdev->stats.rx_dropped = 0;
4924         netdev->stats.rx_length_errors = adapter->stats.rlec;
4925         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4926         netdev->stats.rx_missed_errors = total_mpc;
4927 }
4928
4929 /**
4930  * ixgbe_watchdog - Timer Call-back
4931  * @data: pointer to adapter cast into an unsigned long
4932  **/
4933 static void ixgbe_watchdog(unsigned long data)
4934 {
4935         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4936         struct ixgbe_hw *hw = &adapter->hw;
4937         u64 eics = 0;
4938         int i;
4939
4940         /*
4941          *  Do the watchdog outside of interrupt context due to the lovely
4942          * delays that some of the newer hardware requires
4943          */
4944
4945         if (test_bit(__IXGBE_DOWN, &adapter->state))
4946                 goto watchdog_short_circuit;
4947
4948         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4949                 /*
4950                  * for legacy and MSI interrupts don't set any bits
4951                  * that are enabled for EIAM, because this operation
4952                  * would set *both* EIMS and EICS for any bit in EIAM
4953                  */
4954                 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4955                         (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4956                 goto watchdog_reschedule;
4957         }
4958
4959         /* get one bit for every active tx/rx interrupt vector */
4960         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4961                 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4962                 if (qv->rxr_count || qv->txr_count)
4963                         eics |= ((u64)1 << i);
4964         }
4965
4966         /* Cause software interrupt to ensure rx rings are cleaned */
4967         ixgbe_irq_rearm_queues(adapter, eics);
4968
4969 watchdog_reschedule:
4970         /* Reset the timer */
4971         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4972
4973 watchdog_short_circuit:
4974         schedule_work(&adapter->watchdog_task);
4975 }
4976
4977 /**
4978  * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4979  * @work: pointer to work_struct containing our data
4980  **/
4981 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4982 {
4983         struct ixgbe_adapter *adapter = container_of(work,
4984                                                      struct ixgbe_adapter,
4985                                                      multispeed_fiber_task);
4986         struct ixgbe_hw *hw = &adapter->hw;
4987         u32 autoneg;
4988         bool negotiation;
4989
4990         adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4991         autoneg = hw->phy.autoneg_advertised;
4992         if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4993                 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4994         if (hw->mac.ops.setup_link)
4995                 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4996         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4997         adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4998 }
4999
5000 /**
5001  * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5002  * @work: pointer to work_struct containing our data
5003  **/
5004 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5005 {
5006         struct ixgbe_adapter *adapter = container_of(work,
5007                                                      struct ixgbe_adapter,
5008                                                      sfp_config_module_task);
5009         struct ixgbe_hw *hw = &adapter->hw;
5010         u32 err;
5011
5012         adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5013
5014         /* Time for electrical oscillations to settle down */
5015         msleep(100);
5016         err = hw->phy.ops.identify_sfp(hw);
5017
5018         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5019                 dev_err(&adapter->pdev->dev, "failed to initialize because "
5020                         "an unsupported SFP+ module type was detected.\n"
5021                         "Reload the driver after installing a supported "
5022                         "module.\n");
5023                 unregister_netdev(adapter->netdev);
5024                 return;
5025         }
5026         hw->mac.ops.setup_sfp(hw);
5027
5028         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5029                 /* This will also work for DA Twinax connections */
5030                 schedule_work(&adapter->multispeed_fiber_task);
5031         adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5032 }
5033
5034 /**
5035  * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5036  * @work: pointer to work_struct containing our data
5037  **/
5038 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5039 {
5040         struct ixgbe_adapter *adapter = container_of(work,
5041                                                      struct ixgbe_adapter,
5042                                                      fdir_reinit_task);
5043         struct ixgbe_hw *hw = &adapter->hw;
5044         int i;
5045
5046         if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5047                 for (i = 0; i < adapter->num_tx_queues; i++)
5048                         set_bit(__IXGBE_FDIR_INIT_DONE,
5049                                 &(adapter->tx_ring[i]->reinit_state));
5050         } else {
5051                 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
5052                         "ignored adding FDIR ATR filters \n");
5053         }
5054         /* Done FDIR Re-initialization, enable transmits */
5055         netif_tx_start_all_queues(adapter->netdev);
5056 }
5057
5058 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5059
5060 /**
5061  * ixgbe_watchdog_task - worker thread to bring link up
5062  * @work: pointer to work_struct containing our data
5063  **/
5064 static void ixgbe_watchdog_task(struct work_struct *work)
5065 {
5066         struct ixgbe_adapter *adapter = container_of(work,
5067                                                      struct ixgbe_adapter,
5068                                                      watchdog_task);
5069         struct net_device *netdev = adapter->netdev;
5070         struct ixgbe_hw *hw = &adapter->hw;
5071         u32 link_speed;
5072         bool link_up;
5073         int i;
5074         struct ixgbe_ring *tx_ring;
5075         int some_tx_pending = 0;
5076
5077         mutex_lock(&ixgbe_watchdog_lock);
5078
5079         link_up = adapter->link_up;
5080         link_speed = adapter->link_speed;
5081
5082         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5083                 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5084                 if (link_up) {
5085 #ifdef CONFIG_DCB
5086                         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5087                                 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5088                                         hw->mac.ops.fc_enable(hw, i);
5089                         } else {
5090                                 hw->mac.ops.fc_enable(hw, 0);
5091                         }
5092 #else
5093                         hw->mac.ops.fc_enable(hw, 0);
5094 #endif
5095                 }
5096
5097                 if (link_up ||
5098                     time_after(jiffies, (adapter->link_check_timeout +
5099                                          IXGBE_TRY_LINK_TIMEOUT))) {
5100                         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5101                         IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5102                 }
5103                 adapter->link_up = link_up;
5104                 adapter->link_speed = link_speed;
5105         }
5106
5107         if (link_up) {
5108                 if (!netif_carrier_ok(netdev)) {
5109                         bool flow_rx, flow_tx;
5110
5111                         if (hw->mac.type == ixgbe_mac_82599EB) {
5112                                 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5113                                 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5114                                 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5115                                 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5116                         } else {
5117                                 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5118                                 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5119                                 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5120                                 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5121                         }
5122
5123                         printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
5124                                "Flow Control: %s\n",
5125                                netdev->name,
5126                                (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5127                                 "10 Gbps" :
5128                                 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5129                                  "1 Gbps" : "unknown speed")),
5130                                ((flow_rx && flow_tx) ? "RX/TX" :
5131                                 (flow_rx ? "RX" :
5132                                 (flow_tx ? "TX" : "None"))));
5133
5134                         netif_carrier_on(netdev);
5135                 } else {
5136                         /* Force detection of hung controller */
5137                         adapter->detect_tx_hung = true;
5138                 }
5139         } else {
5140                 adapter->link_up = false;
5141                 adapter->link_speed = 0;
5142                 if (netif_carrier_ok(netdev)) {
5143                         printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
5144                                netdev->name);
5145                         netif_carrier_off(netdev);
5146                 }
5147         }
5148
5149         if (!netif_carrier_ok(netdev)) {
5150                 for (i = 0; i < adapter->num_tx_queues; i++) {
5151                         tx_ring = adapter->tx_ring[i];
5152                         if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5153                                 some_tx_pending = 1;
5154                                 break;
5155                         }
5156                 }
5157
5158                 if (some_tx_pending) {
5159                         /* We've lost link, so the controller stops DMA,
5160                          * but we've got queued Tx work that's never going
5161                          * to get done, so reset controller to flush Tx.
5162                          * (Do the reset outside of interrupt context).
5163                          */
5164                          schedule_work(&adapter->reset_task);
5165                 }
5166         }
5167
5168         ixgbe_update_stats(adapter);
5169         mutex_unlock(&ixgbe_watchdog_lock);
5170 }
5171
5172 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5173                      struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5174                      u32 tx_flags, u8 *hdr_len)
5175 {
5176         struct ixgbe_adv_tx_context_desc *context_desc;
5177         unsigned int i;
5178         int err;
5179         struct ixgbe_tx_buffer *tx_buffer_info;
5180         u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5181         u32 mss_l4len_idx, l4len;
5182
5183         if (skb_is_gso(skb)) {
5184                 if (skb_header_cloned(skb)) {
5185                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5186                         if (err)
5187                                 return err;
5188                 }
5189                 l4len = tcp_hdrlen(skb);
5190                 *hdr_len += l4len;
5191
5192                 if (skb->protocol == htons(ETH_P_IP)) {
5193                         struct iphdr *iph = ip_hdr(skb);
5194                         iph->tot_len = 0;
5195                         iph->check = 0;
5196                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5197                                                                  iph->daddr, 0,
5198                                                                  IPPROTO_TCP,
5199                                                                  0);
5200                 } else if (skb_is_gso_v6(skb)) {
5201                         ipv6_hdr(skb)->payload_len = 0;
5202                         tcp_hdr(skb)->check =
5203                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5204                                              &ipv6_hdr(skb)->daddr,
5205                                              0, IPPROTO_TCP, 0);
5206                 }
5207
5208                 i = tx_ring->next_to_use;
5209
5210                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5211                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5212
5213                 /* VLAN MACLEN IPLEN */
5214                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5215                         vlan_macip_lens |=
5216                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5217                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5218                                     IXGBE_ADVTXD_MACLEN_SHIFT);
5219                 *hdr_len += skb_network_offset(skb);
5220                 vlan_macip_lens |=
5221                     (skb_transport_header(skb) - skb_network_header(skb));
5222                 *hdr_len +=
5223                     (skb_transport_header(skb) - skb_network_header(skb));
5224                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5225                 context_desc->seqnum_seed = 0;
5226
5227                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5228                 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5229                                    IXGBE_ADVTXD_DTYP_CTXT);
5230
5231                 if (skb->protocol == htons(ETH_P_IP))
5232                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5233                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5234                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5235
5236                 /* MSS L4LEN IDX */
5237                 mss_l4len_idx =
5238                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5239                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5240                 /* use index 1 for TSO */
5241                 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5242                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5243
5244                 tx_buffer_info->time_stamp = jiffies;
5245                 tx_buffer_info->next_to_watch = i;
5246
5247                 i++;
5248                 if (i == tx_ring->count)
5249                         i = 0;
5250                 tx_ring->next_to_use = i;
5251
5252                 return true;
5253         }
5254         return false;
5255 }
5256
5257 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5258                           struct ixgbe_ring *tx_ring,
5259                           struct sk_buff *skb, u32 tx_flags)
5260 {
5261         struct ixgbe_adv_tx_context_desc *context_desc;
5262         unsigned int i;
5263         struct ixgbe_tx_buffer *tx_buffer_info;
5264         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5265
5266         if (skb->ip_summed == CHECKSUM_PARTIAL ||
5267             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5268                 i = tx_ring->next_to_use;
5269                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5270                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5271
5272                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5273                         vlan_macip_lens |=
5274                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5275                 vlan_macip_lens |= (skb_network_offset(skb) <<
5276                                     IXGBE_ADVTXD_MACLEN_SHIFT);
5277                 if (skb->ip_summed == CHECKSUM_PARTIAL)
5278                         vlan_macip_lens |= (skb_transport_header(skb) -
5279                                             skb_network_header(skb));
5280
5281                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5282                 context_desc->seqnum_seed = 0;
5283
5284                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5285                                     IXGBE_ADVTXD_DTYP_CTXT);
5286
5287                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
5288                         __be16 protocol;
5289
5290                         if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
5291                                 const struct vlan_ethhdr *vhdr =
5292                                         (const struct vlan_ethhdr *)skb->data;
5293
5294                                 protocol = vhdr->h_vlan_encapsulated_proto;
5295                         } else {
5296                                 protocol = skb->protocol;
5297                         }
5298
5299                         switch (protocol) {
5300                         case cpu_to_be16(ETH_P_IP):
5301                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5302                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5303                                         type_tucmd_mlhl |=
5304                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5305                                 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
5306                                         type_tucmd_mlhl |=
5307                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5308                                 break;
5309                         case cpu_to_be16(ETH_P_IPV6):
5310                                 /* XXX what about other V6 headers?? */
5311                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5312                                         type_tucmd_mlhl |=
5313                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5314                                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
5315                                         type_tucmd_mlhl |=
5316                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5317                                 break;
5318                         default:
5319                                 if (unlikely(net_ratelimit())) {
5320                                         DPRINTK(PROBE, WARNING,
5321                                          "partial checksum but proto=%x!\n",
5322                                          skb->protocol);
5323                                 }
5324                                 break;
5325                         }
5326                 }
5327
5328                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5329                 /* use index zero for tx checksum offload */
5330                 context_desc->mss_l4len_idx = 0;
5331
5332                 tx_buffer_info->time_stamp = jiffies;
5333                 tx_buffer_info->next_to_watch = i;
5334
5335                 i++;
5336                 if (i == tx_ring->count)
5337                         i = 0;
5338                 tx_ring->next_to_use = i;
5339
5340                 return true;
5341         }
5342
5343         return false;
5344 }
5345
5346 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5347                         struct ixgbe_ring *tx_ring,
5348                         struct sk_buff *skb, u32 tx_flags,
5349                         unsigned int first)
5350 {
5351         struct pci_dev *pdev = adapter->pdev;
5352         struct ixgbe_tx_buffer *tx_buffer_info;
5353         unsigned int len;
5354         unsigned int total = skb->len;
5355         unsigned int offset = 0, size, count = 0, i;
5356         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5357         unsigned int f;
5358
5359         i = tx_ring->next_to_use;
5360
5361         if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5362                 /* excluding fcoe_crc_eof for FCoE */
5363                 total -= sizeof(struct fcoe_crc_eof);
5364
5365         len = min(skb_headlen(skb), total);
5366         while (len) {
5367                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5368                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5369
5370                 tx_buffer_info->length = size;
5371                 tx_buffer_info->mapped_as_page = false;
5372                 tx_buffer_info->dma = pci_map_single(pdev,
5373                                                      skb->data + offset,
5374                                                      size, PCI_DMA_TODEVICE);
5375                 if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
5376                         goto dma_error;
5377                 tx_buffer_info->time_stamp = jiffies;
5378                 tx_buffer_info->next_to_watch = i;
5379
5380                 len -= size;
5381                 total -= size;
5382                 offset += size;
5383                 count++;
5384
5385                 if (len) {
5386                         i++;
5387                         if (i == tx_ring->count)
5388                                 i = 0;
5389                 }
5390         }
5391
5392         for (f = 0; f < nr_frags; f++) {
5393                 struct skb_frag_struct *frag;
5394
5395                 frag = &skb_shinfo(skb)->frags[f];
5396                 len = min((unsigned int)frag->size, total);
5397                 offset = frag->page_offset;
5398
5399                 while (len) {
5400                         i++;
5401                         if (i == tx_ring->count)
5402                                 i = 0;
5403
5404                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
5405                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5406
5407                         tx_buffer_info->length = size;
5408                         tx_buffer_info->dma = pci_map_page(adapter->pdev,
5409                                                            frag->page,
5410                                                            offset, size,
5411                                                            PCI_DMA_TODEVICE);
5412                         tx_buffer_info->mapped_as_page = true;
5413                         if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
5414                                 goto dma_error;
5415                         tx_buffer_info->time_stamp = jiffies;
5416                         tx_buffer_info->next_to_watch = i;
5417
5418                         len -= size;
5419                         total -= size;
5420                         offset += size;
5421                         count++;
5422                 }
5423                 if (total == 0)
5424                         break;
5425         }
5426
5427         tx_ring->tx_buffer_info[i].skb = skb;
5428         tx_ring->tx_buffer_info[first].next_to_watch = i;
5429
5430         return count;
5431
5432 dma_error:
5433         dev_err(&pdev->dev, "TX DMA map failed\n");
5434
5435         /* clear timestamp and dma mappings for failed tx_buffer_info map */
5436         tx_buffer_info->dma = 0;
5437         tx_buffer_info->time_stamp = 0;
5438         tx_buffer_info->next_to_watch = 0;
5439         if (count)
5440                 count--;
5441
5442         /* clear timestamp and dma mappings for remaining portion of packet */
5443         while (count--) {
5444                 if (i==0)
5445                         i += tx_ring->count;
5446                 i--;
5447                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5448                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
5449         }
5450
5451         return 0;
5452 }
5453
5454 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5455                            struct ixgbe_ring *tx_ring,
5456                            int tx_flags, int count, u32 paylen, u8 hdr_len)
5457 {
5458         union ixgbe_adv_tx_desc *tx_desc = NULL;
5459         struct ixgbe_tx_buffer *tx_buffer_info;
5460         u32 olinfo_status = 0, cmd_type_len = 0;
5461         unsigned int i;
5462         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
5463
5464         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
5465
5466         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
5467
5468         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5469                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
5470
5471         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
5472                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5473
5474                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5475                                  IXGBE_ADVTXD_POPTS_SHIFT;
5476
5477                 /* use index 1 context for tso */
5478                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5479                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5480                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
5481                                          IXGBE_ADVTXD_POPTS_SHIFT;
5482
5483         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5484                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5485                                  IXGBE_ADVTXD_POPTS_SHIFT;
5486
5487         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5488                 olinfo_status |= IXGBE_ADVTXD_CC;
5489                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5490                 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5491                         cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5492         }
5493
5494         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5495
5496         i = tx_ring->next_to_use;
5497         while (count--) {
5498                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5499                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5500                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5501                 tx_desc->read.cmd_type_len =
5502                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5503                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5504                 i++;
5505                 if (i == tx_ring->count)
5506                         i = 0;
5507         }
5508
5509         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5510
5511         /*
5512          * Force memory writes to complete before letting h/w
5513          * know there are new descriptors to fetch.  (Only
5514          * applicable for weak-ordered memory model archs,
5515          * such as IA-64).
5516          */
5517         wmb();
5518
5519         tx_ring->next_to_use = i;
5520         writel(i, adapter->hw.hw_addr + tx_ring->tail);
5521 }
5522
5523 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5524                       int queue, u32 tx_flags)
5525 {
5526         /* Right now, we support IPv4 only */
5527         struct ixgbe_atr_input atr_input;
5528         struct tcphdr *th;
5529         struct iphdr *iph = ip_hdr(skb);
5530         struct ethhdr *eth = (struct ethhdr *)skb->data;
5531         u16 vlan_id, src_port, dst_port, flex_bytes;
5532         u32 src_ipv4_addr, dst_ipv4_addr;
5533         u8 l4type = 0;
5534
5535         /* check if we're UDP or TCP */
5536         if (iph->protocol == IPPROTO_TCP) {
5537                 th = tcp_hdr(skb);
5538                 src_port = th->source;
5539                 dst_port = th->dest;
5540                 l4type |= IXGBE_ATR_L4TYPE_TCP;
5541                 /* l4type IPv4 type is 0, no need to assign */
5542         } else {
5543                 /* Unsupported L4 header, just bail here */
5544                 return;
5545         }
5546
5547         memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5548
5549         vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5550                    IXGBE_TX_FLAGS_VLAN_SHIFT;
5551         src_ipv4_addr = iph->saddr;
5552         dst_ipv4_addr = iph->daddr;
5553         flex_bytes = eth->h_proto;
5554
5555         ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5556         ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5557         ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5558         ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5559         ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5560         /* src and dst are inverted, think how the receiver sees them */
5561         ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5562         ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5563
5564         /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5565         ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5566 }
5567
5568 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5569                                  struct ixgbe_ring *tx_ring, int size)
5570 {
5571         netif_stop_subqueue(netdev, tx_ring->queue_index);
5572         /* Herbert's original patch had:
5573          *  smp_mb__after_netif_stop_queue();
5574          * but since that doesn't exist yet, just open code it. */
5575         smp_mb();
5576
5577         /* We need to check again in a case another CPU has just
5578          * made room available. */
5579         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5580                 return -EBUSY;
5581
5582         /* A reprieve! - use start_queue because it doesn't call schedule */
5583         netif_start_subqueue(netdev, tx_ring->queue_index);
5584         ++tx_ring->restart_queue;
5585         return 0;
5586 }
5587
5588 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5589                               struct ixgbe_ring *tx_ring, int size)
5590 {
5591         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5592                 return 0;
5593         return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5594 }
5595
5596 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5597 {
5598         struct ixgbe_adapter *adapter = netdev_priv(dev);
5599         int txq = smp_processor_id();
5600
5601         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
5602                 while (unlikely(txq >= dev->real_num_tx_queues))
5603                         txq -= dev->real_num_tx_queues;
5604                 return txq;
5605         }
5606
5607 #ifdef IXGBE_FCOE
5608         if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5609             (skb->protocol == htons(ETH_P_FCOE))) {
5610                 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
5611                 txq += adapter->ring_feature[RING_F_FCOE].mask;
5612                 return txq;
5613         }
5614 #endif
5615         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5616                 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5617
5618         return skb_tx_hash(dev, skb);
5619 }
5620
5621 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5622                                     struct net_device *netdev)
5623 {
5624         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5625         struct ixgbe_ring *tx_ring;
5626         struct netdev_queue *txq;
5627         unsigned int first;
5628         unsigned int tx_flags = 0;
5629         u8 hdr_len = 0;
5630         int tso;
5631         int count = 0;
5632         unsigned int f;
5633
5634         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5635                 tx_flags |= vlan_tx_tag_get(skb);
5636                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5637                         tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5638                         tx_flags |= ((skb->queue_mapping & 0x7) << 13);
5639                 }
5640                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5641                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5642         } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5643                 if (skb->priority != TC_PRIO_CONTROL) {
5644                         tx_flags |= ((skb->queue_mapping & 0x7) << 13);
5645                         tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5646                         tx_flags |= IXGBE_TX_FLAGS_VLAN;
5647                 } else {
5648                         skb->queue_mapping =
5649                                 adapter->ring_feature[RING_F_DCB].indices-1;
5650                 }
5651         }
5652
5653         tx_ring = adapter->tx_ring[skb->queue_mapping];
5654
5655         if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5656             (skb->protocol == htons(ETH_P_FCOE))) {
5657                 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5658 #ifdef IXGBE_FCOE
5659 #ifdef CONFIG_IXGBE_DCB
5660                 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
5661                               << IXGBE_TX_FLAGS_VLAN_SHIFT);
5662                 tx_flags |= ((adapter->fcoe.up << 13)
5663                               << IXGBE_TX_FLAGS_VLAN_SHIFT);
5664 #endif
5665 #endif
5666         }
5667         /* four things can cause us to need a context descriptor */
5668         if (skb_is_gso(skb) ||
5669             (skb->ip_summed == CHECKSUM_PARTIAL) ||
5670             (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5671             (tx_flags & IXGBE_TX_FLAGS_FCOE))
5672                 count++;
5673
5674         count += TXD_USE_COUNT(skb_headlen(skb));
5675         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5676                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5677
5678         if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5679                 adapter->tx_busy++;
5680                 return NETDEV_TX_BUSY;
5681         }
5682
5683         first = tx_ring->next_to_use;
5684         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5685 #ifdef IXGBE_FCOE
5686                 /* setup tx offload for FCoE */
5687                 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5688                 if (tso < 0) {
5689                         dev_kfree_skb_any(skb);
5690                         return NETDEV_TX_OK;
5691                 }
5692                 if (tso)
5693                         tx_flags |= IXGBE_TX_FLAGS_FSO;
5694 #endif /* IXGBE_FCOE */
5695         } else {
5696                 if (skb->protocol == htons(ETH_P_IP))
5697                         tx_flags |= IXGBE_TX_FLAGS_IPV4;
5698                 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5699                 if (tso < 0) {
5700                         dev_kfree_skb_any(skb);
5701                         return NETDEV_TX_OK;
5702                 }
5703
5704                 if (tso)
5705                         tx_flags |= IXGBE_TX_FLAGS_TSO;
5706                 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5707                          (skb->ip_summed == CHECKSUM_PARTIAL))
5708                         tx_flags |= IXGBE_TX_FLAGS_CSUM;
5709         }
5710
5711         count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5712         if (count) {
5713                 /* add the ATR filter if ATR is on */
5714                 if (tx_ring->atr_sample_rate) {
5715                         ++tx_ring->atr_count;
5716                         if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5717                              test_bit(__IXGBE_FDIR_INIT_DONE,
5718                                       &tx_ring->reinit_state)) {
5719                                 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5720                                           tx_flags);
5721                                 tx_ring->atr_count = 0;
5722                         }
5723                 }
5724                 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
5725                 txq->tx_bytes += skb->len;
5726                 txq->tx_packets++;
5727                 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5728                                hdr_len);
5729                 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5730
5731         } else {
5732                 dev_kfree_skb_any(skb);
5733                 tx_ring->tx_buffer_info[first].time_stamp = 0;
5734                 tx_ring->next_to_use = first;
5735         }
5736
5737         return NETDEV_TX_OK;
5738 }
5739
5740 /**
5741  * ixgbe_set_mac - Change the Ethernet Address of the NIC
5742  * @netdev: network interface device structure
5743  * @p: pointer to an address structure
5744  *
5745  * Returns 0 on success, negative on failure
5746  **/
5747 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5748 {
5749         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5750         struct ixgbe_hw *hw = &adapter->hw;
5751         struct sockaddr *addr = p;
5752
5753         if (!is_valid_ether_addr(addr->sa_data))
5754                 return -EADDRNOTAVAIL;
5755
5756         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5757         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5758
5759         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
5760                             IXGBE_RAH_AV);
5761
5762         return 0;
5763 }
5764
5765 static int
5766 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5767 {
5768         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5769         struct ixgbe_hw *hw = &adapter->hw;
5770         u16 value;
5771         int rc;
5772
5773         if (prtad != hw->phy.mdio.prtad)
5774                 return -EINVAL;
5775         rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5776         if (!rc)
5777                 rc = value;
5778         return rc;
5779 }
5780
5781 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5782                             u16 addr, u16 value)
5783 {
5784         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5785         struct ixgbe_hw *hw = &adapter->hw;
5786
5787         if (prtad != hw->phy.mdio.prtad)
5788                 return -EINVAL;
5789         return hw->phy.ops.write_reg(hw, addr, devad, value);
5790 }
5791
5792 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5793 {
5794         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5795
5796         return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5797 }
5798
5799 /**
5800  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5801  * netdev->dev_addrs
5802  * @netdev: network interface device structure
5803  *
5804  * Returns non-zero on failure
5805  **/
5806 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5807 {
5808         int err = 0;
5809         struct ixgbe_adapter *adapter = netdev_priv(dev);
5810         struct ixgbe_mac_info *mac = &adapter->hw.mac;
5811
5812         if (is_valid_ether_addr(mac->san_addr)) {
5813                 rtnl_lock();
5814                 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5815                 rtnl_unlock();
5816         }
5817         return err;
5818 }
5819
5820 /**
5821  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5822  * netdev->dev_addrs
5823  * @netdev: network interface device structure
5824  *
5825  * Returns non-zero on failure
5826  **/
5827 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5828 {
5829         int err = 0;
5830         struct ixgbe_adapter *adapter = netdev_priv(dev);
5831         struct ixgbe_mac_info *mac = &adapter->hw.mac;
5832
5833         if (is_valid_ether_addr(mac->san_addr)) {
5834                 rtnl_lock();
5835                 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5836                 rtnl_unlock();
5837         }
5838         return err;
5839 }
5840
5841 #ifdef CONFIG_NET_POLL_CONTROLLER
5842 /*
5843  * Polling 'interrupt' - used by things like netconsole to send skbs
5844  * without having to re-enable interrupts. It's not called while
5845  * the interrupt routine is executing.
5846  */
5847 static void ixgbe_netpoll(struct net_device *netdev)
5848 {
5849         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5850         int i;
5851
5852         /* if interface is down do nothing */
5853         if (test_bit(__IXGBE_DOWN, &adapter->state))
5854                 return;
5855
5856         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5857         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5858                 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5859                 for (i = 0; i < num_q_vectors; i++) {
5860                         struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5861                         ixgbe_msix_clean_many(0, q_vector);
5862                 }
5863         } else {
5864                 ixgbe_intr(adapter->pdev->irq, netdev);
5865         }
5866         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5867 }
5868 #endif
5869
5870 static const struct net_device_ops ixgbe_netdev_ops = {
5871         .ndo_open               = ixgbe_open,
5872         .ndo_stop               = ixgbe_close,
5873         .ndo_start_xmit         = ixgbe_xmit_frame,
5874         .ndo_select_queue       = ixgbe_select_queue,
5875         .ndo_set_rx_mode        = ixgbe_set_rx_mode,
5876         .ndo_set_multicast_list = ixgbe_set_rx_mode,
5877         .ndo_validate_addr      = eth_validate_addr,
5878         .ndo_set_mac_address    = ixgbe_set_mac,
5879         .ndo_change_mtu         = ixgbe_change_mtu,
5880         .ndo_tx_timeout         = ixgbe_tx_timeout,
5881         .ndo_vlan_rx_register   = ixgbe_vlan_rx_register,
5882         .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
5883         .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
5884         .ndo_do_ioctl           = ixgbe_ioctl,
5885 #ifdef CONFIG_NET_POLL_CONTROLLER
5886         .ndo_poll_controller    = ixgbe_netpoll,
5887 #endif
5888 #ifdef IXGBE_FCOE
5889         .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5890         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5891         .ndo_fcoe_enable = ixgbe_fcoe_enable,
5892         .ndo_fcoe_disable = ixgbe_fcoe_disable,
5893         .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
5894 #endif /* IXGBE_FCOE */
5895 };
5896
5897 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
5898                            const struct ixgbe_info *ii)
5899 {
5900 #ifdef CONFIG_PCI_IOV
5901         struct ixgbe_hw *hw = &adapter->hw;
5902         int err;
5903
5904         if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
5905                 return;
5906
5907         /* The 82599 supports up to 64 VFs per physical function
5908          * but this implementation limits allocation to 63 so that
5909          * basic networking resources are still available to the
5910          * physical function
5911          */
5912         adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
5913         adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
5914         err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
5915         if (err) {
5916                 DPRINTK(PROBE, ERR,
5917                         "Failed to enable PCI sriov: %d\n", err);
5918                 goto err_novfs;
5919         }
5920         /* If call to enable VFs succeeded then allocate memory
5921          * for per VF control structures.
5922          */
5923         adapter->vfinfo =
5924                 kcalloc(adapter->num_vfs,
5925                         sizeof(struct vf_data_storage), GFP_KERNEL);
5926         if (adapter->vfinfo) {
5927                 /* Now that we're sure SR-IOV is enabled
5928                  * and memory allocated set up the mailbox parameters
5929                  */
5930                 ixgbe_init_mbx_params_pf(hw);
5931                 memcpy(&hw->mbx.ops, ii->mbx_ops,
5932                        sizeof(hw->mbx.ops));
5933
5934                 /* Disable RSC when in SR-IOV mode */
5935                 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
5936                                      IXGBE_FLAG2_RSC_ENABLED);
5937                 return;
5938         }
5939
5940         /* Oh oh */
5941         DPRINTK(PROBE, ERR,
5942                 "Unable to allocate memory for VF "
5943                 "Data Storage - SRIOV disabled\n");
5944         pci_disable_sriov(adapter->pdev);
5945
5946 err_novfs:
5947         adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
5948         adapter->num_vfs = 0;
5949 #endif /* CONFIG_PCI_IOV */
5950 }
5951
5952 /**
5953  * ixgbe_probe - Device Initialization Routine
5954  * @pdev: PCI device information struct
5955  * @ent: entry in ixgbe_pci_tbl
5956  *
5957  * Returns 0 on success, negative on failure
5958  *
5959  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5960  * The OS initialization, configuring of the adapter private structure,
5961  * and a hardware reset occur.
5962  **/
5963 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5964                                  const struct pci_device_id *ent)
5965 {
5966         struct net_device *netdev;
5967         struct ixgbe_adapter *adapter = NULL;
5968         struct ixgbe_hw *hw;
5969         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5970         static int cards_found;
5971         int i, err, pci_using_dac;
5972 #ifdef IXGBE_FCOE
5973         u16 device_caps;
5974 #endif
5975         u32 part_num, eec;
5976
5977         err = pci_enable_device_mem(pdev);
5978         if (err)
5979                 return err;
5980
5981         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5982             !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5983                 pci_using_dac = 1;
5984         } else {
5985                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5986                 if (err) {
5987                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5988                         if (err) {
5989                                 dev_err(&pdev->dev, "No usable DMA "
5990                                         "configuration, aborting\n");
5991                                 goto err_dma;
5992                         }
5993                 }
5994                 pci_using_dac = 0;
5995         }
5996
5997         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5998                                            IORESOURCE_MEM), ixgbe_driver_name);
5999         if (err) {
6000                 dev_err(&pdev->dev,
6001                         "pci_request_selected_regions failed 0x%x\n", err);
6002                 goto err_pci_reg;
6003         }
6004
6005         pci_enable_pcie_error_reporting(pdev);
6006
6007         pci_set_master(pdev);
6008         pci_save_state(pdev);
6009
6010         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
6011         if (!netdev) {
6012                 err = -ENOMEM;
6013                 goto err_alloc_etherdev;
6014         }
6015
6016         SET_NETDEV_DEV(netdev, &pdev->dev);
6017
6018         pci_set_drvdata(pdev, netdev);
6019         adapter = netdev_priv(netdev);
6020
6021         adapter->netdev = netdev;
6022         adapter->pdev = pdev;
6023         hw = &adapter->hw;
6024         hw->back = adapter;
6025         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6026
6027         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6028                               pci_resource_len(pdev, 0));
6029         if (!hw->hw_addr) {
6030                 err = -EIO;
6031                 goto err_ioremap;
6032         }
6033
6034         for (i = 1; i <= 5; i++) {
6035                 if (pci_resource_len(pdev, i) == 0)
6036                         continue;
6037         }
6038
6039         netdev->netdev_ops = &ixgbe_netdev_ops;
6040         ixgbe_set_ethtool_ops(netdev);
6041         netdev->watchdog_timeo = 5 * HZ;
6042         strcpy(netdev->name, pci_name(pdev));
6043
6044         adapter->bd_number = cards_found;
6045
6046         /* Setup hw api */
6047         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6048         hw->mac.type  = ii->mac;
6049
6050         /* EEPROM */
6051         memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6052         eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6053         /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6054         if (!(eec & (1 << 8)))
6055                 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6056
6057         /* PHY */
6058         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6059         hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6060         /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6061         hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6062         hw->phy.mdio.mmds = 0;
6063         hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6064         hw->phy.mdio.dev = netdev;
6065         hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6066         hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6067
6068         /* set up this timer and work struct before calling get_invariants
6069          * which might start the timer
6070          */
6071         init_timer(&adapter->sfp_timer);
6072         adapter->sfp_timer.function = &ixgbe_sfp_timer;
6073         adapter->sfp_timer.data = (unsigned long) adapter;
6074
6075         INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6076
6077         /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6078         INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6079
6080         /* a new SFP+ module arrival, called from GPI SDP2 context */
6081         INIT_WORK(&adapter->sfp_config_module_task,
6082                   ixgbe_sfp_config_module_task);
6083
6084         ii->get_invariants(hw);
6085
6086         /* setup the private structure */
6087         err = ixgbe_sw_init(adapter);
6088         if (err)
6089                 goto err_sw_init;
6090
6091         /*
6092          * If there is a fan on this device and it has failed log the
6093          * failure.
6094          */
6095         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6096                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6097                 if (esdp & IXGBE_ESDP_SDP1)
6098                         DPRINTK(PROBE, CRIT,
6099                                 "Fan has stopped, replace the adapter\n");
6100         }
6101
6102         /* reset_hw fills in the perm_addr as well */
6103         err = hw->mac.ops.reset_hw(hw);
6104         if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6105             hw->mac.type == ixgbe_mac_82598EB) {
6106                 /*
6107                  * Start a kernel thread to watch for a module to arrive.
6108                  * Only do this for 82598, since 82599 will generate
6109                  * interrupts on module arrival.
6110                  */
6111                 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6112                 mod_timer(&adapter->sfp_timer,
6113                           round_jiffies(jiffies + (2 * HZ)));
6114                 err = 0;
6115         } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6116                 dev_err(&adapter->pdev->dev, "failed to initialize because "
6117                         "an unsupported SFP+ module type was detected.\n"
6118                         "Reload the driver after installing a supported "
6119                         "module.\n");
6120                 goto err_sw_init;
6121         } else if (err) {
6122                 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
6123                 goto err_sw_init;
6124         }
6125
6126         ixgbe_probe_vf(adapter, ii);
6127
6128         netdev->features = NETIF_F_SG |
6129                            NETIF_F_IP_CSUM |
6130                            NETIF_F_HW_VLAN_TX |
6131                            NETIF_F_HW_VLAN_RX |
6132                            NETIF_F_HW_VLAN_FILTER;
6133
6134         netdev->features |= NETIF_F_IPV6_CSUM;
6135         netdev->features |= NETIF_F_TSO;
6136         netdev->features |= NETIF_F_TSO6;
6137         netdev->features |= NETIF_F_GRO;
6138
6139         if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6140                 netdev->features |= NETIF_F_SCTP_CSUM;
6141
6142         netdev->vlan_features |= NETIF_F_TSO;
6143         netdev->vlan_features |= NETIF_F_TSO6;
6144         netdev->vlan_features |= NETIF_F_IP_CSUM;
6145         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6146         netdev->vlan_features |= NETIF_F_SG;
6147
6148         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6149                 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6150                                     IXGBE_FLAG_DCB_ENABLED);
6151         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6152                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6153
6154 #ifdef CONFIG_IXGBE_DCB
6155         netdev->dcbnl_ops = &dcbnl_ops;
6156 #endif
6157
6158 #ifdef IXGBE_FCOE
6159         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6160                 if (hw->mac.ops.get_device_caps) {
6161                         hw->mac.ops.get_device_caps(hw, &device_caps);
6162                         if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6163                                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6164                 }
6165         }
6166 #endif /* IXGBE_FCOE */
6167         if (pci_using_dac)
6168                 netdev->features |= NETIF_F_HIGHDMA;
6169
6170         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6171                 netdev->features |= NETIF_F_LRO;
6172
6173         /* make sure the EEPROM is good */
6174         if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6175                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
6176                 err = -EIO;
6177                 goto err_eeprom;
6178         }
6179
6180         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6181         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6182
6183         if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6184                 dev_err(&pdev->dev, "invalid MAC address\n");
6185                 err = -EIO;
6186                 goto err_eeprom;
6187         }
6188
6189         init_timer(&adapter->watchdog_timer);
6190         adapter->watchdog_timer.function = &ixgbe_watchdog;
6191         adapter->watchdog_timer.data = (unsigned long)adapter;
6192
6193         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6194         INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6195
6196         err = ixgbe_init_interrupt_scheme(adapter);
6197         if (err)
6198                 goto err_sw_init;
6199
6200         switch (pdev->device) {
6201         case IXGBE_DEV_ID_82599_KX4:
6202                 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6203                                 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6204                 /* Enable ACPI wakeup in GRC */
6205                 IXGBE_WRITE_REG(hw, IXGBE_GRC,
6206                              (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
6207                 break;
6208         default:
6209                 adapter->wol = 0;
6210                 break;
6211         }
6212         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6213
6214         /* pick up the PCI bus settings for reporting later */
6215         hw->mac.ops.get_bus_info(hw);
6216
6217         /* print bus type/speed/width info */
6218         dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
6219                 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
6220                  (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
6221                 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
6222                  (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
6223                  (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
6224                  "Unknown"),
6225                 netdev->dev_addr);
6226         ixgbe_read_pba_num_generic(hw, &part_num);
6227         if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6228                 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
6229                          hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6230                          (part_num >> 8), (part_num & 0xff));
6231         else
6232                 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6233                          hw->mac.type, hw->phy.type,
6234                          (part_num >> 8), (part_num & 0xff));
6235
6236         if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6237                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
6238                          "this card is not sufficient for optimal "
6239                          "performance.\n");
6240                 dev_warn(&pdev->dev, "For optimal performance a x8 "
6241                          "PCI-Express slot is required.\n");
6242         }
6243
6244         /* save off EEPROM version number */
6245         hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
6246
6247         /* reset the hardware with the new settings */
6248         err = hw->mac.ops.start_hw(hw);
6249
6250         if (err == IXGBE_ERR_EEPROM_VERSION) {
6251                 /* We are running on a pre-production device, log a warning */
6252                 dev_warn(&pdev->dev, "This device is a pre-production "
6253                          "adapter/LOM.  Please be aware there may be issues "
6254                          "associated with your hardware.  If you are "
6255                          "experiencing problems please contact your Intel or "
6256                          "hardware representative who provided you with this "
6257                          "hardware.\n");
6258         }
6259         strcpy(netdev->name, "eth%d");
6260         err = register_netdev(netdev);
6261         if (err)
6262                 goto err_register;
6263
6264         /* carrier off reporting is important to ethtool even BEFORE open */
6265         netif_carrier_off(netdev);
6266
6267         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6268             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6269                 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
6270
6271 #ifdef CONFIG_IXGBE_DCA
6272         if (dca_add_requester(&pdev->dev) == 0) {
6273                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
6274                 ixgbe_setup_dca(adapter);
6275         }
6276 #endif
6277         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6278                 DPRINTK(PROBE, INFO, "IOV is enabled with %d VFs\n",
6279                         adapter->num_vfs);
6280                 for (i = 0; i < adapter->num_vfs; i++)
6281                         ixgbe_vf_configuration(pdev, (i | 0x10000000));
6282         }
6283
6284         /* add san mac addr to netdev */
6285         ixgbe_add_sanmac_netdev(netdev);
6286
6287         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
6288         cards_found++;
6289         return 0;
6290
6291 err_register:
6292         ixgbe_release_hw_control(adapter);
6293         ixgbe_clear_interrupt_scheme(adapter);
6294 err_sw_init:
6295 err_eeprom:
6296         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6297                 ixgbe_disable_sriov(adapter);
6298         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6299         del_timer_sync(&adapter->sfp_timer);
6300         cancel_work_sync(&adapter->sfp_task);
6301         cancel_work_sync(&adapter->multispeed_fiber_task);
6302         cancel_work_sync(&adapter->sfp_config_module_task);
6303         iounmap(hw->hw_addr);
6304 err_ioremap:
6305         free_netdev(netdev);
6306 err_alloc_etherdev:
6307         pci_release_selected_regions(pdev, pci_select_bars(pdev,
6308                                      IORESOURCE_MEM));
6309 err_pci_reg:
6310 err_dma:
6311         pci_disable_device(pdev);
6312         return err;
6313 }
6314
6315 /**
6316  * ixgbe_remove - Device Removal Routine
6317  * @pdev: PCI device information struct
6318  *
6319  * ixgbe_remove is called by the PCI subsystem to alert the driver
6320  * that it should release a PCI device.  The could be caused by a
6321  * Hot-Plug event, or because the driver is going to be removed from
6322  * memory.
6323  **/
6324 static void __devexit ixgbe_remove(struct pci_dev *pdev)
6325 {
6326         struct net_device *netdev = pci_get_drvdata(pdev);
6327         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6328
6329         set_bit(__IXGBE_DOWN, &adapter->state);
6330         /* clear the module not found bit to make sure the worker won't
6331          * reschedule
6332          */
6333         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6334         del_timer_sync(&adapter->watchdog_timer);
6335
6336         del_timer_sync(&adapter->sfp_timer);
6337         cancel_work_sync(&adapter->watchdog_task);
6338         cancel_work_sync(&adapter->sfp_task);
6339         cancel_work_sync(&adapter->multispeed_fiber_task);
6340         cancel_work_sync(&adapter->sfp_config_module_task);
6341         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6342             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6343                 cancel_work_sync(&adapter->fdir_reinit_task);
6344         flush_scheduled_work();
6345
6346 #ifdef CONFIG_IXGBE_DCA
6347         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
6348                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
6349                 dca_remove_requester(&pdev->dev);
6350                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
6351         }
6352
6353 #endif
6354 #ifdef IXGBE_FCOE
6355         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6356                 ixgbe_cleanup_fcoe(adapter);
6357
6358 #endif /* IXGBE_FCOE */
6359
6360         /* remove the added san mac */
6361         ixgbe_del_sanmac_netdev(netdev);
6362
6363         if (netdev->reg_state == NETREG_REGISTERED)
6364                 unregister_netdev(netdev);
6365
6366         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6367                 ixgbe_disable_sriov(adapter);
6368
6369         ixgbe_clear_interrupt_scheme(adapter);
6370
6371         ixgbe_release_hw_control(adapter);
6372
6373         iounmap(adapter->hw.hw_addr);
6374         pci_release_selected_regions(pdev, pci_select_bars(pdev,
6375                                      IORESOURCE_MEM));
6376
6377         DPRINTK(PROBE, INFO, "complete\n");
6378
6379         free_netdev(netdev);
6380
6381         pci_disable_pcie_error_reporting(pdev);
6382
6383         pci_disable_device(pdev);
6384 }
6385
6386 /**
6387  * ixgbe_io_error_detected - called when PCI error is detected
6388  * @pdev: Pointer to PCI device
6389  * @state: The current pci connection state
6390  *
6391  * This function is called after a PCI bus error affecting
6392  * this device has been detected.
6393  */
6394 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
6395                                                 pci_channel_state_t state)
6396 {
6397         struct net_device *netdev = pci_get_drvdata(pdev);
6398         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6399
6400         netif_device_detach(netdev);
6401
6402         if (state == pci_channel_io_perm_failure)
6403                 return PCI_ERS_RESULT_DISCONNECT;
6404
6405         if (netif_running(netdev))
6406                 ixgbe_down(adapter);
6407         pci_disable_device(pdev);
6408
6409         /* Request a slot reset. */
6410         return PCI_ERS_RESULT_NEED_RESET;
6411 }
6412
6413 /**
6414  * ixgbe_io_slot_reset - called after the pci bus has been reset.
6415  * @pdev: Pointer to PCI device
6416  *
6417  * Restart the card from scratch, as if from a cold-boot.
6418  */
6419 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
6420 {
6421         struct net_device *netdev = pci_get_drvdata(pdev);
6422         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6423         pci_ers_result_t result;
6424         int err;
6425
6426         if (pci_enable_device_mem(pdev)) {
6427                 DPRINTK(PROBE, ERR,
6428                         "Cannot re-enable PCI device after reset.\n");
6429                 result = PCI_ERS_RESULT_DISCONNECT;
6430         } else {
6431                 pci_set_master(pdev);
6432                 pci_restore_state(pdev);
6433                 pci_save_state(pdev);
6434
6435                 pci_wake_from_d3(pdev, false);
6436
6437                 ixgbe_reset(adapter);
6438                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6439                 result = PCI_ERS_RESULT_RECOVERED;
6440         }
6441
6442         err = pci_cleanup_aer_uncorrect_error_status(pdev);
6443         if (err) {
6444                 dev_err(&pdev->dev,
6445                   "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
6446                 /* non-fatal, continue */
6447         }
6448
6449         return result;
6450 }
6451
6452 /**
6453  * ixgbe_io_resume - called when traffic can start flowing again.
6454  * @pdev: Pointer to PCI device
6455  *
6456  * This callback is called when the error recovery driver tells us that
6457  * its OK to resume normal operation.
6458  */
6459 static void ixgbe_io_resume(struct pci_dev *pdev)
6460 {
6461         struct net_device *netdev = pci_get_drvdata(pdev);
6462         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6463
6464         if (netif_running(netdev)) {
6465                 if (ixgbe_up(adapter)) {
6466                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
6467                         return;
6468                 }
6469         }
6470
6471         netif_device_attach(netdev);
6472 }
6473
6474 static struct pci_error_handlers ixgbe_err_handler = {
6475         .error_detected = ixgbe_io_error_detected,
6476         .slot_reset = ixgbe_io_slot_reset,
6477         .resume = ixgbe_io_resume,
6478 };
6479
6480 static struct pci_driver ixgbe_driver = {
6481         .name     = ixgbe_driver_name,
6482         .id_table = ixgbe_pci_tbl,
6483         .probe    = ixgbe_probe,
6484         .remove   = __devexit_p(ixgbe_remove),
6485 #ifdef CONFIG_PM
6486         .suspend  = ixgbe_suspend,
6487         .resume   = ixgbe_resume,
6488 #endif
6489         .shutdown = ixgbe_shutdown,
6490         .err_handler = &ixgbe_err_handler
6491 };
6492
6493 /**
6494  * ixgbe_init_module - Driver Registration Routine
6495  *
6496  * ixgbe_init_module is the first routine called when the driver is
6497  * loaded. All it does is register with the PCI subsystem.
6498  **/
6499 static int __init ixgbe_init_module(void)
6500 {
6501         int ret;
6502         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
6503                ixgbe_driver_string, ixgbe_driver_version);
6504
6505         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
6506
6507 #ifdef CONFIG_IXGBE_DCA
6508         dca_register_notify(&dca_notifier);
6509 #endif
6510
6511         ret = pci_register_driver(&ixgbe_driver);
6512         return ret;
6513 }
6514
6515 module_init(ixgbe_init_module);
6516
6517 /**
6518  * ixgbe_exit_module - Driver Exit Cleanup Routine
6519  *
6520  * ixgbe_exit_module is called just before the driver is removed
6521  * from memory.
6522  **/
6523 static void __exit ixgbe_exit_module(void)
6524 {
6525 #ifdef CONFIG_IXGBE_DCA
6526         dca_unregister_notify(&dca_notifier);
6527 #endif
6528         pci_unregister_driver(&ixgbe_driver);
6529 }
6530
6531 #ifdef CONFIG_IXGBE_DCA
6532 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
6533                             void *p)
6534 {
6535         int ret_val;
6536
6537         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
6538                                          __ixgbe_notify_dca);
6539
6540         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
6541 }
6542
6543 #endif /* CONFIG_IXGBE_DCA */
6544 #ifdef DEBUG
6545 /**
6546  * ixgbe_get_hw_dev_name - return device name string
6547  * used by hardware layer to print debugging information
6548  **/
6549 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
6550 {
6551         struct ixgbe_adapter *adapter = hw->back;
6552         return adapter->netdev->name;
6553 }
6554
6555 #endif
6556 module_exit(ixgbe_exit_module);
6557
6558 /* ixgbe_main.c */