drivers/net/ixgbe/ixgbe_main.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2009 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
  48 char ixgbe_driver_name[] = "ixgbe";
  49 static const char ixgbe_driver_string[] =
  50                               "Intel(R) 10 Gigabit PCI Express Network Driver";
  51
  52 #define DRV_VERSION "2.0.37-k2"
  53 const char ixgbe_driver_version[] = DRV_VERSION;
  54 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
  55
  56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  57         [board_82598] = &ixgbe_82598_info,
  58         [board_82599] = &ixgbe_82599_info,
  59 };
  60
  61 /* ixgbe_pci_tbl - PCI Device ID Table
  62  *
  63  * Wildcard entries (PCI_ANY_ID) should come last
  64  * Last entry must be all 0s
  65  *
  66  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  67  *   Class, Class Mask, private data (not used) }
  68  */
  69 static struct pci_device_id ixgbe_pci_tbl[] = {
  70         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
  71          board_82598 },
  72         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  73          board_82598 },
  74         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  75          board_82598 },
  76         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
  77          board_82598 },
  78         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
  79          board_82598 },
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  81          board_82598 },
  82         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
  83          board_82598 },
  84         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
  85          board_82598 },
  86         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
  87          board_82598 },
  88         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
  89          board_82598 },
  90         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
  91          board_82598 },
  92         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
  93          board_82598 },
  94         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
  95          board_82599 },
  96         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
  97          board_82599 },
  98         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
  99          board_82599 },
 100
 101         /* required last entry */
 102         {0, }
 103 };
 104 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
 105
 106 #ifdef CONFIG_IXGBE_DCA
 107 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
 108                             void *p);
 109 static struct notifier_block dca_notifier = {
 110         .notifier_call = ixgbe_notify_dca,
 111         .next          = NULL,
 112         .priority      = 0
 113 };
 114 #endif
 115
 116 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 117 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 118 MODULE_LICENSE("GPL");
 119 MODULE_VERSION(DRV_VERSION);
 120
 121 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 122
 123 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 124 {
 125         u32 ctrl_ext;
 126
 127         /* Let firmware take over control of h/w */
 128         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 129         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 130                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 131 }
 132
 133 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 134 {
 135         u32 ctrl_ext;
 136
 137         /* Let firmware know the driver has taken over */
 138         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 139         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 140                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 141 }
 142
 143 /*
 144  * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 145  * @adapter: pointer to adapter struct
 146  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 147  * @queue: queue to map the corresponding interrupt to
 148  * @msix_vector: the vector to map to the corresponding queue
 149  *
 150  */
 151 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
 152                            u8 queue, u8 msix_vector)
 153 {
 154         u32 ivar, index;
 155         struct ixgbe_hw *hw = &adapter->hw;
 156         switch (hw->mac.type) {
 157         case ixgbe_mac_82598EB:
 158                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 159                 if (direction == -1)
 160                         direction = 0;
 161                 index = (((direction * 64) + queue) >> 2) & 0x1F;
 162                 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
 163                 ivar &= ~(0xFF << (8 * (queue & 0x3)));
 164                 ivar |= (msix_vector << (8 * (queue & 0x3)));
 165                 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
 166                 break;
 167         case ixgbe_mac_82599EB:
 168                 if (direction == -1) {
 169                         /* other causes */
 170                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 171                         index = ((queue & 1) * 8);
 172                         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
 173                         ivar &= ~(0xFF << index);
 174                         ivar |= (msix_vector << index);
 175                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
 176                         break;
 177                 } else {
 178                         /* tx or rx causes */
 179                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 180                         index = ((16 * (queue & 1)) + (8 * direction));
 181                         ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
 182                         ivar &= ~(0xFF << index);
 183                         ivar |= (msix_vector << index);
 184                         IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
 185                         break;
 186                 }
 187         default:
 188                 break;
 189         }
 190 }
 191
 192 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
 193                                           u64 qmask)
 194 {
 195         u32 mask;
 196
 197         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 198                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
 199                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
 200         } else {
 201                 mask = (qmask & 0xFFFFFFFF);
 202                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
 203                 mask = (qmask >> 32);
 204                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
 205         }
 206 }
 207
 208 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 209                                              struct ixgbe_tx_buffer
 210                                              *tx_buffer_info)
 211 {
 212         tx_buffer_info->dma = 0;
 213         if (tx_buffer_info->skb) {
 214                 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
 215                               DMA_TO_DEVICE);
 216                 dev_kfree_skb_any(tx_buffer_info->skb);
 217                 tx_buffer_info->skb = NULL;
 218         }
 219         tx_buffer_info->time_stamp = 0;
 220         /* tx_buffer_info must be completely set up in the transmit path */
 221 }
 222
 223 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 224                                        struct ixgbe_ring *tx_ring,
 225                                        unsigned int eop)
 226 {
 227         struct ixgbe_hw *hw = &adapter->hw;
 228
 229         /* Detect a transmit hang in hardware, this serializes the
 230          * check with the clearing of time_stamp and movement of eop */
 231         adapter->detect_tx_hung = false;
 232         if (tx_ring->tx_buffer_info[eop].time_stamp &&
 233             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 234             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 235                 /* detected Tx unit hang */
 236                 union ixgbe_adv_tx_desc *tx_desc;
 237                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 238                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 239                         "  Tx Queue             <%d>\n"
 240                         "  TDH, TDT             <%x>, <%x>\n"
 241                         "  next_to_use          <%x>\n"
 242                         "  next_to_clean        <%x>\n"
 243                         "tx_buffer_info[next_to_clean]\n"
 244                         "  time_stamp           <%lx>\n"
 245                         "  jiffies              <%lx>\n",
 246                         tx_ring->queue_index,
 247                         IXGBE_READ_REG(hw, tx_ring->head),
 248                         IXGBE_READ_REG(hw, tx_ring->tail),
 249                         tx_ring->next_to_use, eop,
 250                         tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
 251                 return true;
 252         }
 253
 254         return false;
 255 }
 256
 257 #define IXGBE_MAX_TXD_PWR       14
 258 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 259
 260 /* Tx Descriptors needed, worst case */
 261 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 262                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 263 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 264         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
 265
 266 static void ixgbe_tx_timeout(struct net_device *netdev);
 267
 268 /**
 269  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 270  * @q_vector: structure containing interrupt and ring information
 271  * @tx_ring: tx ring to clean
 272  **/
 273 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 274                                struct ixgbe_ring *tx_ring)
 275 {
 276         struct ixgbe_adapter *adapter = q_vector->adapter;
 277         struct net_device *netdev = adapter->netdev;
 278         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 279         struct ixgbe_tx_buffer *tx_buffer_info;
 280         unsigned int i, eop, count = 0;
 281         unsigned int total_bytes = 0, total_packets = 0;
 282
 283         i = tx_ring->next_to_clean;
 284         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 285         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 286
 287         while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
 288                (count < tx_ring->work_limit)) {
 289                 bool cleaned = false;
 290                 for ( ; !cleaned; count++) {
 291                         struct sk_buff *skb;
 292                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 293                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 294                         cleaned = (i == eop);
 295                         skb = tx_buffer_info->skb;
 296
 297                         if (cleaned && skb) {
 298                                 unsigned int segs, bytecount;
 299                                 unsigned int hlen = skb_headlen(skb);
 300
 301                                 /* gso_segs is currently only valid for tcp */
 302                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 303 #ifdef IXGBE_FCOE
 304                                 /* adjust for FCoE Sequence Offload */
 305                                 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
 306                                     && (skb->protocol == htons(ETH_P_FCOE)) &&
 307                                     skb_is_gso(skb)) {
 308                                         hlen = skb_transport_offset(skb) +
 309                                                 sizeof(struct fc_frame_header) +
 310                                                 sizeof(struct fcoe_crc_eof);
 311                                         segs = DIV_ROUND_UP(skb->len - hlen,
 312                                                 skb_shinfo(skb)->gso_size);
 313                                 }
 314 #endif /* IXGBE_FCOE */
 315                                 /* multiply data chunks by size of headers */
 316                                 bytecount = ((segs - 1) * hlen) + skb->len;
 317                                 total_packets += segs;
 318                                 total_bytes += bytecount;
 319                         }
 320
 321                         ixgbe_unmap_and_free_tx_resource(adapter,
 322                                                          tx_buffer_info);
 323
 324                         tx_desc->wb.status = 0;
 325
 326                         i++;
 327                         if (i == tx_ring->count)
 328                                 i = 0;
 329                 }
 330
 331                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 332                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 333         }
 334
 335         tx_ring->next_to_clean = i;
 336
 337 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 338         if (unlikely(count && netif_carrier_ok(netdev) &&
 339                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 340                 /* Make sure that anybody stopping the queue after this
 341                  * sees the new next_to_clean.
 342                  */
 343                 smp_mb();
 344                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 345                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 346                         netif_wake_subqueue(netdev, tx_ring->queue_index);
 347                         ++adapter->restart_queue;
 348                 }
 349         }
 350
 351         if (adapter->detect_tx_hung) {
 352                 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
 353                         /* schedule immediate reset if we believe we hung */
 354                         DPRINTK(PROBE, INFO,
 355                                 "tx hang %d detected, resetting adapter\n",
 356                                 adapter->tx_timeout_count + 1);
 357                         ixgbe_tx_timeout(adapter->netdev);
 358                 }
 359         }
 360
 361         /* re-arm the interrupt */
 362         if (count >= tx_ring->work_limit)
 363                 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
 364
 365         tx_ring->total_bytes += total_bytes;
 366         tx_ring->total_packets += total_packets;
 367         tx_ring->stats.packets += total_packets;
 368         tx_ring->stats.bytes += total_bytes;
 369         adapter->net_stats.tx_bytes += total_bytes;
 370         adapter->net_stats.tx_packets += total_packets;
 371         return (count < tx_ring->work_limit);
 372 }
 373
 374 #ifdef CONFIG_IXGBE_DCA
 375 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
 376                                 struct ixgbe_ring *rx_ring)
 377 {
 378         u32 rxctrl;
 379         int cpu = get_cpu();
 380         int q = rx_ring - adapter->rx_ring;
 381
 382         if (rx_ring->cpu != cpu) {
 383                 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
 384                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 385                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 386                         rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 387                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 388                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
 389                         rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 390                                    IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
 391                 }
 392                 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 393                 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 394                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
 395                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
 396                             IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
 397                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
 398                 rx_ring->cpu = cpu;
 399         }
 400         put_cpu();
 401 }
 402
 403 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 404                                 struct ixgbe_ring *tx_ring)
 405 {
 406         u32 txctrl;
 407         int cpu = get_cpu();
 408         int q = tx_ring - adapter->tx_ring;
 409
 410         if (tx_ring->cpu != cpu) {
 411                 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
 412                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 413                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 414                         txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 415                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 416                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
 417                         txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 418                                    IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
 419                 }
 420                 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 421                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
 422                 tx_ring->cpu = cpu;
 423         }
 424         put_cpu();
 425 }
 426
 427 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
 428 {
 429         int i;
 430
 431         if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
 432                 return;
 433
 434         /* always use CB2 mode, difference is masked in the CB driver */
 435         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
 436
 437         for (i = 0; i < adapter->num_tx_queues; i++) {
 438                 adapter->tx_ring[i].cpu = -1;
 439                 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
 440         }
 441         for (i = 0; i < adapter->num_rx_queues; i++) {
 442                 adapter->rx_ring[i].cpu = -1;
 443                 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
 444         }
 445 }
 446
 447 static int __ixgbe_notify_dca(struct device *dev, void *data)
 448 {
 449         struct net_device *netdev = dev_get_drvdata(dev);
 450         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 451         unsigned long event = *(unsigned long *)data;
 452
 453         switch (event) {
 454         case DCA_PROVIDER_ADD:
 455                 /* if we're already enabled, don't do it again */
 456                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 457                         break;
 458                 if (dca_add_requester(dev) == 0) {
 459                         adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
 460                         ixgbe_setup_dca(adapter);
 461                         break;
 462                 }
 463                 /* Fall Through since DCA is disabled. */
 464         case DCA_PROVIDER_REMOVE:
 465                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
 466                         dca_remove_requester(dev);
 467                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
 468                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
 469                 }
 470                 break;
 471         }
 472
 473         return 0;
 474 }
 475
 476 #endif /* CONFIG_IXGBE_DCA */
 477 /**
 478  * ixgbe_receive_skb - Send a completed packet up the stack
 479  * @adapter: board private structure
 480  * @skb: packet to send up
 481  * @status: hardware indication of status of receive
 482  * @rx_ring: rx descriptor ring (for a specific queue) to setup
 483  * @rx_desc: rx descriptor
 484  **/
 485 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
 486                               struct sk_buff *skb, u8 status,
 487                               struct ixgbe_ring *ring,
 488                               union ixgbe_adv_rx_desc *rx_desc)
 489 {
 490         struct ixgbe_adapter *adapter = q_vector->adapter;
 491         struct napi_struct *napi = &q_vector->napi;
 492         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 493         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 494
 495         skb_record_rx_queue(skb, ring->queue_index);
 496         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 497                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 498                         vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
 499                 else
 500                         napi_gro_receive(napi, skb);
 501         } else {
 502                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 503                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 504                 else
 505                         netif_rx(skb);
 506         }
 507 }
 508
 509 /**
 510  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 511  * @adapter: address of board private structure
 512  * @status_err: hardware indication of status of receive
 513  * @skb: skb currently being received and modified
 514  **/
 515 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 516                                      union ixgbe_adv_rx_desc *rx_desc,
 517                                      struct sk_buff *skb)
 518 {
 519         u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
 520
 521         skb->ip_summed = CHECKSUM_NONE;
 522
 523         /* Rx csum disabled */
 524         if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 525                 return;
 526
 527         /* if IP and error */
 528         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 529             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 530                 adapter->hw_csum_rx_error++;
 531                 return;
 532         }
 533
 534         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 535                 return;
 536
 537         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 538                 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
 539
 540                 /*
 541                  * 82599 errata, UDP frames with a 0 checksum can be marked as
 542                  * checksum errors.
 543                  */
 544                 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
 545                     (adapter->hw.mac.type == ixgbe_mac_82599EB))
 546                         return;
 547
 548                 adapter->hw_csum_rx_error++;
 549                 return;
 550         }
 551
 552         /* It must be a TCP or UDP packet with a valid checksum */
 553         skb->ip_summed = CHECKSUM_UNNECESSARY;
 554         adapter->hw_csum_rx_good++;
 555 }
 556
 557 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
 558                                          struct ixgbe_ring *rx_ring, u32 val)
 559 {
 560         /*
 561          * Force memory writes to complete before letting h/w
 562          * know there are new descriptors to fetch.  (Only
 563          * applicable for weak-ordered memory model archs,
 564          * such as IA-64).
 565          */
 566         wmb();
 567         IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
 568 }
 569
 570 /**
 571  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 572  * @adapter: address of board private structure
 573  **/
 574 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 575                                    struct ixgbe_ring *rx_ring,
 576                                    int cleaned_count)
 577 {
 578         struct pci_dev *pdev = adapter->pdev;
 579         union ixgbe_adv_rx_desc *rx_desc;
 580         struct ixgbe_rx_buffer *bi;
 581         unsigned int i;
 582
 583         i = rx_ring->next_to_use;
 584         bi = &rx_ring->rx_buffer_info[i];
 585
 586         while (cleaned_count--) {
 587                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 588
 589                 if (!bi->page_dma &&
 590                     (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
 591                         if (!bi->page) {
 592                                 bi->page = alloc_page(GFP_ATOMIC);
 593                                 if (!bi->page) {
 594                                         adapter->alloc_rx_page_failed++;
 595                                         goto no_buffers;
 596                                 }
 597                                 bi->page_offset = 0;
 598                         } else {
 599                                 /* use a half page if we're re-using */
 600                                 bi->page_offset ^= (PAGE_SIZE / 2);
 601                         }
 602
 603                         bi->page_dma = pci_map_page(pdev, bi->page,
 604                                                     bi->page_offset,
 605                                                     (PAGE_SIZE / 2),
 606                                                     PCI_DMA_FROMDEVICE);
 607                 }
 608
 609                 if (!bi->skb) {
 610                         struct sk_buff *skb;
 611                         skb = netdev_alloc_skb(adapter->netdev,
 612                                                (rx_ring->rx_buf_len +
 613                                                 NET_IP_ALIGN));
 614
 615                         if (!skb) {
 616                                 adapter->alloc_rx_buff_failed++;
 617                                 goto no_buffers;
 618                         }
 619
 620                         /*
 621                          * Make buffer alignment 2 beyond a 16 byte boundary
 622                          * this will result in a 16 byte aligned IP header after
 623                          * the 14 byte MAC header is removed
 624                          */
 625                         skb_reserve(skb, NET_IP_ALIGN);
 626
 627                         bi->skb = skb;
 628                         bi->dma = pci_map_single(pdev, skb->data,
 629                                                  rx_ring->rx_buf_len,
 630                                                  PCI_DMA_FROMDEVICE);
 631                 }
 632                 /* Refresh the desc even if buffer_addrs didn't change because
 633                  * each write-back erases this info. */
 634                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 635                         rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
 636                         rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
 637                 } else {
 638                         rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 639                 }
 640
 641                 i++;
 642                 if (i == rx_ring->count)
 643                         i = 0;
 644                 bi = &rx_ring->rx_buffer_info[i];
 645         }
 646
 647 no_buffers:
 648         if (rx_ring->next_to_use != i) {
 649                 rx_ring->next_to_use = i;
 650                 if (i-- == 0)
 651                         i = (rx_ring->count - 1);
 652
 653                 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
 654         }
 655 }
 656
 657 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
 658 {
 659         return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
 660 }
 661
 662 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
 663 {
 664         return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
 665 }
 666
 667 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
 668 {
 669         return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
 670                 IXGBE_RXDADV_RSCCNT_MASK) >>
 671                 IXGBE_RXDADV_RSCCNT_SHIFT;
 672 }
 673
 674 /**
 675  * ixgbe_transform_rsc_queue - change rsc queue into a full packet
 676  * @skb: pointer to the last skb in the rsc queue
 677  *
 678  * This function changes a queue full of hw rsc buffers into a completed
 679  * packet.  It uses the ->prev pointers to find the first packet and then
 680  * turns it into the frag list owner.
 681  **/
 682 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
 683 {
 684         unsigned int frag_list_size = 0;
 685
 686         while (skb->prev) {
 687                 struct sk_buff *prev = skb->prev;
 688                 frag_list_size += skb->len;
 689                 skb->prev = NULL;
 690                 skb = prev;
 691         }
 692
 693         skb_shinfo(skb)->frag_list = skb->next;
 694         skb->next = NULL;
 695         skb->len += frag_list_size;
 696         skb->data_len += frag_list_size;
 697         skb->truesize += frag_list_size;
 698         return skb;
 699 }
 700
 701 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
 702                                struct ixgbe_ring *rx_ring,
 703                                int *work_done, int work_to_do)
 704 {
 705         struct ixgbe_adapter *adapter = q_vector->adapter;
 706         struct pci_dev *pdev = adapter->pdev;
 707         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 708         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 709         struct sk_buff *skb;
 710         unsigned int i, rsc_count = 0;
 711         u32 len, staterr;
 712         u16 hdr_info;
 713         bool cleaned = false;
 714         int cleaned_count = 0;
 715         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 716 #ifdef IXGBE_FCOE
 717         int ddp_bytes = 0;
 718 #endif /* IXGBE_FCOE */
 719
 720         i = rx_ring->next_to_clean;
 721         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 722         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 723         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 724
 725         while (staterr & IXGBE_RXD_STAT_DD) {
 726                 u32 upper_len = 0;
 727                 if (*work_done >= work_to_do)
 728                         break;
 729                 (*work_done)++;
 730
 731                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 732                         hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
 733                         len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 734                                IXGBE_RXDADV_HDRBUFLEN_SHIFT;
 735                         if (hdr_info & IXGBE_RXDADV_SPH)
 736                                 adapter->rx_hdr_split++;
 737                         if (len > IXGBE_RX_HDR_SIZE)
 738                                 len = IXGBE_RX_HDR_SIZE;
 739                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 740                 } else {
 741                         len = le16_to_cpu(rx_desc->wb.upper.length);
 742                 }
 743
 744                 cleaned = true;
 745                 skb = rx_buffer_info->skb;
 746                 prefetch(skb->data - NET_IP_ALIGN);
 747                 rx_buffer_info->skb = NULL;
 748
 749                 if (rx_buffer_info->dma) {
 750                         pci_unmap_single(pdev, rx_buffer_info->dma,
 751                                          rx_ring->rx_buf_len,
 752                                          PCI_DMA_FROMDEVICE);
 753                         rx_buffer_info->dma = 0;
 754                         skb_put(skb, len);
 755                 }
 756
 757                 if (upper_len) {
 758                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 759                                        PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
 760                         rx_buffer_info->page_dma = 0;
 761                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 762                                            rx_buffer_info->page,
 763                                            rx_buffer_info->page_offset,
 764                                            upper_len);
 765
 766                         if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
 767                             (page_count(rx_buffer_info->page) != 1))
 768                                 rx_buffer_info->page = NULL;
 769                         else
 770                                 get_page(rx_buffer_info->page);
 771
 772                         skb->len += upper_len;
 773                         skb->data_len += upper_len;
 774                         skb->truesize += upper_len;
 775                 }
 776
 777                 i++;
 778                 if (i == rx_ring->count)
 779                         i = 0;
 780
 781                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 782                 prefetch(next_rxd);
 783                 cleaned_count++;
 784
 785                 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
 786                         rsc_count = ixgbe_get_rsc_count(rx_desc);
 787
 788                 if (rsc_count) {
 789                         u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
 790                                      IXGBE_RXDADV_NEXTP_SHIFT;
 791                         next_buffer = &rx_ring->rx_buffer_info[nextp];
 792                         rx_ring->rsc_count += (rsc_count - 1);
 793                 } else {
 794                         next_buffer = &rx_ring->rx_buffer_info[i];
 795                 }
 796
 797                 if (staterr & IXGBE_RXD_STAT_EOP) {
 798                         if (skb->prev)
 799                                 skb = ixgbe_transform_rsc_queue(skb);
 800                         rx_ring->stats.packets++;
 801                         rx_ring->stats.bytes += skb->len;
 802                 } else {
 803                         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
 804                                 rx_buffer_info->skb = next_buffer->skb;
 805                                 rx_buffer_info->dma = next_buffer->dma;
 806                                 next_buffer->skb = skb;
 807                                 next_buffer->dma = 0;
 808                         } else {
 809                                 skb->next = next_buffer->skb;
 810                                 skb->next->prev = skb;
 811                         }
 812                         adapter->non_eop_descs++;
 813                         goto next_desc;
 814                 }
 815
 816                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 817                         dev_kfree_skb_irq(skb);
 818                         goto next_desc;
 819                 }
 820
 821                 ixgbe_rx_checksum(adapter, rx_desc, skb);
 822
 823                 /* probably a little skewed due to removing CRC */
 824                 total_rx_bytes += skb->len;
 825                 total_rx_packets++;
 826
 827                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 828 #ifdef IXGBE_FCOE
 829                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
 830                 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
 831                         ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
 832                         if (!ddp_bytes)
 833                                 goto next_desc;
 834                 }
 835 #endif /* IXGBE_FCOE */
 836                 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
 837
 838 next_desc:
 839                 rx_desc->wb.upper.status_error = 0;
 840
 841                 /* return some buffers to hardware, one at a time is too slow */
 842                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 843                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 844                         cleaned_count = 0;
 845                 }
 846
 847                 /* use prefetched values */
 848                 rx_desc = next_rxd;
 849                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 850
 851                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 852         }
 853
 854         rx_ring->next_to_clean = i;
 855         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 856
 857         if (cleaned_count)
 858                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 859
 860 #ifdef IXGBE_FCOE
 861         /* include DDPed FCoE data */
 862         if (ddp_bytes > 0) {
 863                 unsigned int mss;
 864
 865                 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
 866                         sizeof(struct fc_frame_header) -
 867                         sizeof(struct fcoe_crc_eof);
 868                 if (mss > 512)
 869                         mss &= ~511;
 870                 total_rx_bytes += ddp_bytes;
 871                 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
 872         }
 873 #endif /* IXGBE_FCOE */
 874
 875         rx_ring->total_packets += total_rx_packets;
 876         rx_ring->total_bytes += total_rx_bytes;
 877         adapter->net_stats.rx_bytes += total_rx_bytes;
 878         adapter->net_stats.rx_packets += total_rx_packets;
 879
 880         return cleaned;
 881 }
 882
 883 static int ixgbe_clean_rxonly(struct napi_struct *, int);
 884 /**
 885  * ixgbe_configure_msix - Configure MSI-X hardware
 886  * @adapter: board private structure
 887  *
 888  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 889  * interrupts.
 890  **/
 891 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 892 {
 893         struct ixgbe_q_vector *q_vector;
 894         int i, j, q_vectors, v_idx, r_idx;
 895         u32 mask;
 896
 897         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 898
 899         /*
 900          * Populate the IVAR table and set the ITR values to the
 901          * corresponding register.
 902          */
 903         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 904                 q_vector = adapter->q_vector[v_idx];
 905                 /* XXX for_each_bit(...) */
 906                 r_idx = find_first_bit(q_vector->rxr_idx,
 907                                        adapter->num_rx_queues);
 908
 909                 for (i = 0; i < q_vector->rxr_count; i++) {
 910                         j = adapter->rx_ring[r_idx].reg_idx;
 911                         ixgbe_set_ivar(adapter, 0, j, v_idx);
 912                         r_idx = find_next_bit(q_vector->rxr_idx,
 913                                               adapter->num_rx_queues,
 914                                               r_idx + 1);
 915                 }
 916                 r_idx = find_first_bit(q_vector->txr_idx,
 917                                        adapter->num_tx_queues);
 918
 919                 for (i = 0; i < q_vector->txr_count; i++) {
 920                         j = adapter->tx_ring[r_idx].reg_idx;
 921                         ixgbe_set_ivar(adapter, 1, j, v_idx);
 922                         r_idx = find_next_bit(q_vector->txr_idx,
 923                                               adapter->num_tx_queues,
 924                                               r_idx + 1);
 925                 }
 926
 927                 /* if this is a tx only vector halve the interrupt rate */
 928                 if (q_vector->txr_count && !q_vector->rxr_count)
 929                         q_vector->eitr = (adapter->eitr_param >> 1);
 930                 else if (q_vector->rxr_count)
 931                         /* rx only */
 932                         q_vector->eitr = adapter->eitr_param;
 933
 934                 ixgbe_write_eitr(q_vector);
 935         }
 936
 937         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
 938                 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
 939                                v_idx);
 940         else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
 941                 ixgbe_set_ivar(adapter, -1, 1, v_idx);
 942         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
 943
 944         /* set up to autoclear timer, and the vectors */
 945         mask = IXGBE_EIMS_ENABLE_MASK;
 946         mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
 947         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
 948 }
 949
 950 enum latency_range {
 951         lowest_latency = 0,
 952         low_latency = 1,
 953         bulk_latency = 2,
 954         latency_invalid = 255
 955 };
 956
 957 /**
 958  * ixgbe_update_itr - update the dynamic ITR value based on statistics
 959  * @adapter: pointer to adapter
 960  * @eitr: eitr setting (ints per sec) to give last timeslice
 961  * @itr_setting: current throttle rate in ints/second
 962  * @packets: the number of packets during this measurement interval
 963  * @bytes: the number of bytes during this measurement interval
 964  *
 965  *      Stores a new ITR value based on packets and byte
 966  *      counts during the last interrupt.  The advantage of per interrupt
 967  *      computation is faster updates and more accurate ITR for the current
 968  *      traffic pattern.  Constants in this function were computed
 969  *      based on theoretical maximum wire speed and thresholds were set based
 970  *      on testing data as well as attempting to minimize response time
 971  *      while increasing bulk throughput.
 972  *      this functionality is controlled by the InterruptThrottleRate module
 973  *      parameter (see ixgbe_param.c)
 974  **/
 975 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
 976                            u32 eitr, u8 itr_setting,
 977                            int packets, int bytes)
 978 {
 979         unsigned int retval = itr_setting;
 980         u32 timepassed_us;
 981         u64 bytes_perint;
 982
 983         if (packets == 0)
 984                 goto update_itr_done;
 985
 986
 987         /* simple throttlerate management
 988          *    0-20MB/s lowest (100000 ints/s)
 989          *   20-100MB/s low   (20000 ints/s)
 990          *  100-1249MB/s bulk (8000 ints/s)
 991          */
 992         /* what was last interrupt timeslice? */
 993         timepassed_us = 1000000/eitr;
 994         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 995
 996         switch (itr_setting) {
 997         case lowest_latency:
 998                 if (bytes_perint > adapter->eitr_low)
 999                         retval = low_latency;
1000                 break;
1001         case low_latency:
1002                 if (bytes_perint > adapter->eitr_high)
1003                         retval = bulk_latency;
1004                 else if (bytes_perint <= adapter->eitr_low)
1005                         retval = lowest_latency;
1006                 break;
1007         case bulk_latency:
1008                 if (bytes_perint <= adapter->eitr_high)
1009                         retval = low_latency;
1010                 break;
1011         }
1012
1013 update_itr_done:
1014         return retval;
1015 }
1016
1017 /**
1018  * ixgbe_write_eitr - write EITR register in hardware specific way
1019  * @q_vector: structure containing interrupt and ring information
1020  *
1021  * This function is made to be called by ethtool and by the driver
1022  * when it needs to update EITR registers at runtime.  Hardware
1023  * specific quirks/differences are taken care of here.
1024  */
1025 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1026 {
1027         struct ixgbe_adapter *adapter = q_vector->adapter;
1028         struct ixgbe_hw *hw = &adapter->hw;
1029         int v_idx = q_vector->v_idx;
1030         u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1031
1032         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1033                 /* must write high and low 16 bits to reset counter */
1034                 itr_reg |= (itr_reg << 16);
1035         } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1036                 /*
1037                  * set the WDIS bit to not clear the timer bits and cause an
1038                  * immediate assertion of the interrupt
1039                  */
1040                 itr_reg |= IXGBE_EITR_CNT_WDIS;
1041         }
1042         IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1043 }
1044
1045 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1046 {
1047         struct ixgbe_adapter *adapter = q_vector->adapter;
1048         u32 new_itr;
1049         u8 current_itr, ret_itr;
1050         int i, r_idx;
1051         struct ixgbe_ring *rx_ring, *tx_ring;
1052
1053         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1054         for (i = 0; i < q_vector->txr_count; i++) {
1055                 tx_ring = &(adapter->tx_ring[r_idx]);
1056                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1057                                            q_vector->tx_itr,
1058                                            tx_ring->total_packets,
1059                                            tx_ring->total_bytes);
1060                 /* if the result for this queue would decrease interrupt
1061                  * rate for this vector then use that result */
1062                 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1063                                     q_vector->tx_itr - 1 : ret_itr);
1064                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1065                                       r_idx + 1);
1066         }
1067
1068         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1069         for (i = 0; i < q_vector->rxr_count; i++) {
1070                 rx_ring = &(adapter->rx_ring[r_idx]);
1071                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1072                                            q_vector->rx_itr,
1073                                            rx_ring->total_packets,
1074                                            rx_ring->total_bytes);
1075                 /* if the result for this queue would decrease interrupt
1076                  * rate for this vector then use that result */
1077                 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1078                                     q_vector->rx_itr - 1 : ret_itr);
1079                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1080                                       r_idx + 1);
1081         }
1082
1083         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1084
1085         switch (current_itr) {
1086         /* counts and packets in update_itr are dependent on these numbers */
1087         case lowest_latency:
1088                 new_itr = 100000;
1089                 break;
1090         case low_latency:
1091                 new_itr = 20000; /* aka hwitr = ~200 */
1092                 break;
1093         case bulk_latency:
1094         default:
1095                 new_itr = 8000;
1096                 break;
1097         }
1098
1099         if (new_itr != q_vector->eitr) {
1100                 /* do an exponential smoothing */
1101                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1102
1103                 /* save the algorithm value here, not the smoothed one */
1104                 q_vector->eitr = new_itr;
1105
1106                 ixgbe_write_eitr(q_vector);
1107         }
1108
1109         return;
1110 }
1111
1112 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1113 {
1114         struct ixgbe_hw *hw = &adapter->hw;
1115
1116         if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1117             (eicr & IXGBE_EICR_GPI_SDP1)) {
1118                 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1119                 /* write to clear the interrupt */
1120                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1121         }
1122 }
1123
1124 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1125 {
1126         struct ixgbe_hw *hw = &adapter->hw;
1127
1128         if (eicr & IXGBE_EICR_GPI_SDP1) {
1129                 /* Clear the interrupt */
1130                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1131                 schedule_work(&adapter->multispeed_fiber_task);
1132         } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1133                 /* Clear the interrupt */
1134                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1135                 schedule_work(&adapter->sfp_config_module_task);
1136         } else {
1137                 /* Interrupt isn't for us... */
1138                 return;
1139         }
1140 }
1141
1142 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1143 {
1144         struct ixgbe_hw *hw = &adapter->hw;
1145
1146         adapter->lsc_int++;
1147         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1148         adapter->link_check_timeout = jiffies;
1149         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1150                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1151                 schedule_work(&adapter->watchdog_task);
1152         }
1153 }
1154
1155 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1156 {
1157         struct net_device *netdev = data;
1158         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1159         struct ixgbe_hw *hw = &adapter->hw;
1160         u32 eicr;
1161
1162         /*
1163          * Workaround for Silicon errata.  Use clear-by-write instead
1164          * of clear-by-read.  Reading with EICS will return the
1165          * interrupt causes without clearing, which later be done
1166          * with the write to EICR.
1167          */
1168         eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1169         IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1170
1171         if (eicr & IXGBE_EICR_LSC)
1172                 ixgbe_check_lsc(adapter);
1173
1174         if (hw->mac.type == ixgbe_mac_82598EB)
1175                 ixgbe_check_fan_failure(adapter, eicr);
1176
1177         if (hw->mac.type == ixgbe_mac_82599EB) {
1178                 ixgbe_check_sfp_event(adapter, eicr);
1179
1180                 /* Handle Flow Director Full threshold interrupt */
1181                 if (eicr & IXGBE_EICR_FLOW_DIR) {
1182                         int i;
1183                         IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1184                         /* Disable transmits before FDIR Re-initialization */
1185                         netif_tx_stop_all_queues(netdev);
1186                         for (i = 0; i < adapter->num_tx_queues; i++) {
1187                                 struct ixgbe_ring *tx_ring =
1188                                                            &adapter->tx_ring[i];
1189                                 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1190                                                        &tx_ring->reinit_state))
1191                                         schedule_work(&adapter->fdir_reinit_task);
1192                         }
1193                 }
1194         }
1195         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1196                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1197
1198         return IRQ_HANDLED;
1199 }
1200
1201 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1202                                            u64 qmask)
1203 {
1204         u32 mask;
1205
1206         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1207                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1208                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1209         } else {
1210                 mask = (qmask & 0xFFFFFFFF);
1211                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1212                 mask = (qmask >> 32);
1213                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1214         }
1215         /* skip the flush */
1216 }
1217
1218 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1219                                             u64 qmask)
1220 {
1221         u32 mask;
1222
1223         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1224                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1225                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1226         } else {
1227                 mask = (qmask & 0xFFFFFFFF);
1228                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1229                 mask = (qmask >> 32);
1230                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1231         }
1232         /* skip the flush */
1233 }
1234
1235 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1236 {
1237         struct ixgbe_q_vector *q_vector = data;
1238         struct ixgbe_adapter  *adapter = q_vector->adapter;
1239         struct ixgbe_ring     *tx_ring;
1240         int i, r_idx;
1241
1242         if (!q_vector->txr_count)
1243                 return IRQ_HANDLED;
1244
1245         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1246         for (i = 0; i < q_vector->txr_count; i++) {
1247                 tx_ring = &(adapter->tx_ring[r_idx]);
1248                 tx_ring->total_bytes = 0;
1249                 tx_ring->total_packets = 0;
1250                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1251                                       r_idx + 1);
1252         }
1253
1254         /* disable interrupts on this vector only */
1255         ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1256         napi_schedule(&q_vector->napi);
1257
1258         return IRQ_HANDLED;
1259 }
1260
1261 /**
1262  * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1263  * @irq: unused
1264  * @data: pointer to our q_vector struct for this interrupt vector
1265  **/
1266 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1267 {
1268         struct ixgbe_q_vector *q_vector = data;
1269         struct ixgbe_adapter  *adapter = q_vector->adapter;
1270         struct ixgbe_ring  *rx_ring;
1271         int r_idx;
1272         int i;
1273
1274         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1275         for (i = 0;  i < q_vector->rxr_count; i++) {
1276                 rx_ring = &(adapter->rx_ring[r_idx]);
1277                 rx_ring->total_bytes = 0;
1278                 rx_ring->total_packets = 0;
1279                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1280                                       r_idx + 1);
1281         }
1282
1283         if (!q_vector->rxr_count)
1284                 return IRQ_HANDLED;
1285
1286         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1287         rx_ring = &(adapter->rx_ring[r_idx]);
1288         /* disable interrupts on this vector only */
1289         ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1290         napi_schedule(&q_vector->napi);
1291
1292         return IRQ_HANDLED;
1293 }
1294
1295 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1296 {
1297         struct ixgbe_q_vector *q_vector = data;
1298         struct ixgbe_adapter  *adapter = q_vector->adapter;
1299         struct ixgbe_ring  *ring;
1300         int r_idx;
1301         int i;
1302
1303         if (!q_vector->txr_count && !q_vector->rxr_count)
1304                 return IRQ_HANDLED;
1305
1306         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1307         for (i = 0; i < q_vector->txr_count; i++) {
1308                 ring = &(adapter->tx_ring[r_idx]);
1309                 ring->total_bytes = 0;
1310                 ring->total_packets = 0;
1311                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1312                                       r_idx + 1);
1313         }
1314
1315         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1316         for (i = 0; i < q_vector->rxr_count; i++) {
1317                 ring = &(adapter->rx_ring[r_idx]);
1318                 ring->total_bytes = 0;
1319                 ring->total_packets = 0;
1320                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1321                                       r_idx + 1);
1322         }
1323
1324         /* disable interrupts on this vector only */
1325         ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1326         napi_schedule(&q_vector->napi);
1327
1328         return IRQ_HANDLED;
1329 }
1330
1331 /**
1332  * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1333  * @napi: napi struct with our devices info in it
1334  * @budget: amount of work driver is allowed to do this pass, in packets
1335  *
1336  * This function is optimized for cleaning one queue only on a single
1337  * q_vector!!!
1338  **/
1339 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1340 {
1341         struct ixgbe_q_vector *q_vector =
1342                                container_of(napi, struct ixgbe_q_vector, napi);
1343         struct ixgbe_adapter *adapter = q_vector->adapter;
1344         struct ixgbe_ring *rx_ring = NULL;
1345         int work_done = 0;
1346         long r_idx;
1347
1348         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1349         rx_ring = &(adapter->rx_ring[r_idx]);
1350 #ifdef CONFIG_IXGBE_DCA
1351         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1352                 ixgbe_update_rx_dca(adapter, rx_ring);
1353 #endif
1354
1355         ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1356
1357         /* If all Rx work done, exit the polling mode */
1358         if (work_done < budget) {
1359                 napi_complete(napi);
1360                 if (adapter->itr_setting & 1)
1361                         ixgbe_set_itr_msix(q_vector);
1362                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1363                         ixgbe_irq_enable_queues(adapter,
1364                                                 ((u64)1 << q_vector->v_idx));
1365         }
1366
1367         return work_done;
1368 }
1369
1370 /**
1371  * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1372  * @napi: napi struct with our devices info in it
1373  * @budget: amount of work driver is allowed to do this pass, in packets
1374  *
1375  * This function will clean more than one rx queue associated with a
1376  * q_vector.
1377  **/
1378 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1379 {
1380         struct ixgbe_q_vector *q_vector =
1381                                container_of(napi, struct ixgbe_q_vector, napi);
1382         struct ixgbe_adapter *adapter = q_vector->adapter;
1383         struct ixgbe_ring *ring = NULL;
1384         int work_done = 0, i;
1385         long r_idx;
1386         bool tx_clean_complete = true;
1387
1388         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1389         for (i = 0; i < q_vector->txr_count; i++) {
1390                 ring = &(adapter->tx_ring[r_idx]);
1391 #ifdef CONFIG_IXGBE_DCA
1392                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1393                         ixgbe_update_tx_dca(adapter, ring);
1394 #endif
1395                 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1396                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1397                                       r_idx + 1);
1398         }
1399
1400         /* attempt to distribute budget to each queue fairly, but don't allow
1401          * the budget to go below 1 because we'll exit polling */
1402         budget /= (q_vector->rxr_count ?: 1);
1403         budget = max(budget, 1);
1404         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1405         for (i = 0; i < q_vector->rxr_count; i++) {
1406                 ring = &(adapter->rx_ring[r_idx]);
1407 #ifdef CONFIG_IXGBE_DCA
1408                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1409                         ixgbe_update_rx_dca(adapter, ring);
1410 #endif
1411                 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1412                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1413                                       r_idx + 1);
1414         }
1415
1416         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1417         ring = &(adapter->rx_ring[r_idx]);
1418         /* If all Rx work done, exit the polling mode */
1419         if (work_done < budget) {
1420                 napi_complete(napi);
1421                 if (adapter->itr_setting & 1)
1422                         ixgbe_set_itr_msix(q_vector);
1423                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1424                         ixgbe_irq_enable_queues(adapter,
1425                                                 ((u64)1 << q_vector->v_idx));
1426                 return 0;
1427         }
1428
1429         return work_done;
1430 }
1431
1432 /**
1433  * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1434  * @napi: napi struct with our devices info in it
1435  * @budget: amount of work driver is allowed to do this pass, in packets
1436  *
1437  * This function is optimized for cleaning one queue only on a single
1438  * q_vector!!!
1439  **/
1440 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1441 {
1442         struct ixgbe_q_vector *q_vector =
1443                                container_of(napi, struct ixgbe_q_vector, napi);
1444         struct ixgbe_adapter *adapter = q_vector->adapter;
1445         struct ixgbe_ring *tx_ring = NULL;
1446         int work_done = 0;
1447         long r_idx;
1448
1449         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1450         tx_ring = &(adapter->tx_ring[r_idx]);
1451 #ifdef CONFIG_IXGBE_DCA
1452         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1453                 ixgbe_update_tx_dca(adapter, tx_ring);
1454 #endif
1455
1456         if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1457                 work_done = budget;
1458
1459         /* If all Rx work done, exit the polling mode */
1460         if (work_done < budget) {
1461                 napi_complete(napi);
1462                 if (adapter->itr_setting & 1)
1463                         ixgbe_set_itr_msix(q_vector);
1464                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1465                         ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1466         }
1467
1468         return work_done;
1469 }
1470
1471 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1472                                      int r_idx)
1473 {
1474         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1475
1476         set_bit(r_idx, q_vector->rxr_idx);
1477         q_vector->rxr_count++;
1478 }
1479
1480 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1481                                      int t_idx)
1482 {
1483         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1484
1485         set_bit(t_idx, q_vector->txr_idx);
1486         q_vector->txr_count++;
1487 }
1488
1489 /**
1490  * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1491  * @adapter: board private structure to initialize
1492  * @vectors: allotted vector count for descriptor rings
1493  *
1494  * This function maps descriptor rings to the queue-specific vectors
1495  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
1496  * one vector per ring/queue, but on a constrained vector budget, we
1497  * group the rings as "efficiently" as possible.  You would add new
1498  * mapping configurations in here.
1499  **/
1500 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1501                                       int vectors)
1502 {
1503         int v_start = 0;
1504         int rxr_idx = 0, txr_idx = 0;
1505         int rxr_remaining = adapter->num_rx_queues;
1506         int txr_remaining = adapter->num_tx_queues;
1507         int i, j;
1508         int rqpv, tqpv;
1509         int err = 0;
1510
1511         /* No mapping required if MSI-X is disabled. */
1512         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1513                 goto out;
1514
1515         /*
1516          * The ideal configuration...
1517          * We have enough vectors to map one per queue.
1518          */
1519         if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1520                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1521                         map_vector_to_rxq(adapter, v_start, rxr_idx);
1522
1523                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1524                         map_vector_to_txq(adapter, v_start, txr_idx);
1525
1526                 goto out;
1527         }
1528
1529         /*
1530          * If we don't have enough vectors for a 1-to-1
1531          * mapping, we'll have to group them so there are
1532          * multiple queues per vector.
1533          */
1534         /* Re-adjusting *qpv takes care of the remainder. */
1535         for (i = v_start; i < vectors; i++) {
1536                 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1537                 for (j = 0; j < rqpv; j++) {
1538                         map_vector_to_rxq(adapter, i, rxr_idx);
1539                         rxr_idx++;
1540                         rxr_remaining--;
1541                 }
1542         }
1543         for (i = v_start; i < vectors; i++) {
1544                 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1545                 for (j = 0; j < tqpv; j++) {
1546                         map_vector_to_txq(adapter, i, txr_idx);
1547                         txr_idx++;
1548                         txr_remaining--;
1549                 }
1550         }
1551
1552 out:
1553         return err;
1554 }
1555
1556 /**
1557  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1558  * @adapter: board private structure
1559  *
1560  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1561  * interrupts from the kernel.
1562  **/
1563 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1564 {
1565         struct net_device *netdev = adapter->netdev;
1566         irqreturn_t (*handler)(int, void *);
1567         int i, vector, q_vectors, err;
1568         int ri=0, ti=0;
1569
1570         /* Decrement for Other and TCP Timer vectors */
1571         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1572
1573         /* Map the Tx/Rx rings to the vectors we were allotted. */
1574         err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1575         if (err)
1576                 goto out;
1577
1578 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1579                          (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1580                          &ixgbe_msix_clean_many)
1581         for (vector = 0; vector < q_vectors; vector++) {
1582                 handler = SET_HANDLER(adapter->q_vector[vector]);
1583
1584                 if(handler == &ixgbe_msix_clean_rx) {
1585                         sprintf(adapter->name[vector], "%s-%s-%d",
1586                                 netdev->name, "rx", ri++);
1587                 }
1588                 else if(handler == &ixgbe_msix_clean_tx) {
1589                         sprintf(adapter->name[vector], "%s-%s-%d",
1590                                 netdev->name, "tx", ti++);
1591                 }
1592                 else
1593                         sprintf(adapter->name[vector], "%s-%s-%d",
1594                                 netdev->name, "TxRx", vector);
1595
1596                 err = request_irq(adapter->msix_entries[vector].vector,
1597                                   handler, 0, adapter->name[vector],
1598                                   adapter->q_vector[vector]);
1599                 if (err) {
1600                         DPRINTK(PROBE, ERR,
1601                                 "request_irq failed for MSIX interrupt "
1602                                 "Error: %d\n", err);
1603                         goto free_queue_irqs;
1604                 }
1605         }
1606
1607         sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1608         err = request_irq(adapter->msix_entries[vector].vector,
1609                           &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1610         if (err) {
1611                 DPRINTK(PROBE, ERR,
1612                         "request_irq for msix_lsc failed: %d\n", err);
1613                 goto free_queue_irqs;
1614         }
1615
1616         return 0;
1617
1618 free_queue_irqs:
1619         for (i = vector - 1; i >= 0; i--)
1620                 free_irq(adapter->msix_entries[--vector].vector,
1621                          adapter->q_vector[i]);
1622         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1623         pci_disable_msix(adapter->pdev);
1624         kfree(adapter->msix_entries);
1625         adapter->msix_entries = NULL;
1626 out:
1627         return err;
1628 }
1629
1630 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1631 {
1632         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1633         u8 current_itr;
1634         u32 new_itr = q_vector->eitr;
1635         struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1636         struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1637
1638         q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1639                                             q_vector->tx_itr,
1640                                             tx_ring->total_packets,
1641                                             tx_ring->total_bytes);
1642         q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1643                                             q_vector->rx_itr,
1644                                             rx_ring->total_packets,
1645                                             rx_ring->total_bytes);
1646
1647         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1648
1649         switch (current_itr) {
1650         /* counts and packets in update_itr are dependent on these numbers */
1651         case lowest_latency:
1652                 new_itr = 100000;
1653                 break;
1654         case low_latency:
1655                 new_itr = 20000; /* aka hwitr = ~200 */
1656                 break;
1657         case bulk_latency:
1658                 new_itr = 8000;
1659                 break;
1660         default:
1661                 break;
1662         }
1663
1664         if (new_itr != q_vector->eitr) {
1665                 /* do an exponential smoothing */
1666                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1667
1668                 /* save the algorithm value here, not the smoothed one */
1669                 q_vector->eitr = new_itr;
1670
1671                 ixgbe_write_eitr(q_vector);
1672         }
1673
1674         return;
1675 }
1676
1677 /**
1678  * ixgbe_irq_enable - Enable default interrupt generation settings
1679  * @adapter: board private structure
1680  **/
1681 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1682 {
1683         u32 mask;
1684
1685         mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1686         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1687                 mask |= IXGBE_EIMS_GPI_SDP1;
1688         if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1689                 mask |= IXGBE_EIMS_ECC;
1690                 mask |= IXGBE_EIMS_GPI_SDP1;
1691                 mask |= IXGBE_EIMS_GPI_SDP2;
1692         }
1693         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1694             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1695                 mask |= IXGBE_EIMS_FLOW_DIR;
1696
1697         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1698         ixgbe_irq_enable_queues(adapter, ~0);
1699         IXGBE_WRITE_FLUSH(&adapter->hw);
1700 }
1701
1702 /**
1703  * ixgbe_intr - legacy mode Interrupt Handler
1704  * @irq: interrupt number
1705  * @data: pointer to a network interface device structure
1706  **/
1707 static irqreturn_t ixgbe_intr(int irq, void *data)
1708 {
1709         struct net_device *netdev = data;
1710         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1711         struct ixgbe_hw *hw = &adapter->hw;
1712         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1713         u32 eicr;
1714
1715         /*
1716          * Workaround for silicon errata.  Mask the interrupts
1717          * before the read of EICR.
1718          */
1719         IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1720
1721         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1722          * therefore no explict interrupt disable is necessary */
1723         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1724         if (!eicr) {
1725                 /* shared interrupt alert!
1726                  * make sure interrupts are enabled because the read will
1727                  * have disabled interrupts due to EIAM */
1728                 ixgbe_irq_enable(adapter);
1729                 return IRQ_NONE;        /* Not our interrupt */
1730         }
1731
1732         if (eicr & IXGBE_EICR_LSC)
1733                 ixgbe_check_lsc(adapter);
1734
1735         if (hw->mac.type == ixgbe_mac_82599EB)
1736                 ixgbe_check_sfp_event(adapter, eicr);
1737
1738         ixgbe_check_fan_failure(adapter, eicr);
1739
1740         if (napi_schedule_prep(&(q_vector->napi))) {
1741                 adapter->tx_ring[0].total_packets = 0;
1742                 adapter->tx_ring[0].total_bytes = 0;
1743                 adapter->rx_ring[0].total_packets = 0;
1744                 adapter->rx_ring[0].total_bytes = 0;
1745                 /* would disable interrupts here but EIAM disabled it */
1746                 __napi_schedule(&(q_vector->napi));
1747         }
1748
1749         return IRQ_HANDLED;
1750 }
1751
1752 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1753 {
1754         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1755
1756         for (i = 0; i < q_vectors; i++) {
1757                 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1758                 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1759                 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1760                 q_vector->rxr_count = 0;
1761                 q_vector->txr_count = 0;
1762         }
1763 }
1764
1765 /**
1766  * ixgbe_request_irq - initialize interrupts
1767  * @adapter: board private structure
1768  *
1769  * Attempts to configure interrupts using the best available
1770  * capabilities of the hardware and kernel.
1771  **/
1772 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1773 {
1774         struct net_device *netdev = adapter->netdev;
1775         int err;
1776
1777         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1778                 err = ixgbe_request_msix_irqs(adapter);
1779         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1780                 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1781                                   netdev->name, netdev);
1782         } else {
1783                 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1784                                   netdev->name, netdev);
1785         }
1786
1787         if (err)
1788                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1789
1790         return err;
1791 }
1792
1793 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1794 {
1795         struct net_device *netdev = adapter->netdev;
1796
1797         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1798                 int i, q_vectors;
1799
1800                 q_vectors = adapter->num_msix_vectors;
1801
1802                 i = q_vectors - 1;
1803                 free_irq(adapter->msix_entries[i].vector, netdev);
1804
1805                 i--;
1806                 for (; i >= 0; i--) {
1807                         free_irq(adapter->msix_entries[i].vector,
1808                                  adapter->q_vector[i]);
1809                 }
1810
1811                 ixgbe_reset_q_vectors(adapter);
1812         } else {
1813                 free_irq(adapter->pdev->irq, netdev);
1814         }
1815 }
1816
1817 /**
1818  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1819  * @adapter: board private structure
1820  **/
1821 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1822 {
1823         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1824                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1825         } else {
1826                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1827                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1828                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1829         }
1830         IXGBE_WRITE_FLUSH(&adapter->hw);
1831         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1832                 int i;
1833                 for (i = 0; i < adapter->num_msix_vectors; i++)
1834                         synchronize_irq(adapter->msix_entries[i].vector);
1835         } else {
1836                 synchronize_irq(adapter->pdev->irq);
1837         }
1838 }
1839
1840 /**
1841  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1842  *
1843  **/
1844 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1845 {
1846         struct ixgbe_hw *hw = &adapter->hw;
1847
1848         IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1849                         EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1850
1851         ixgbe_set_ivar(adapter, 0, 0, 0);
1852         ixgbe_set_ivar(adapter, 1, 0, 0);
1853
1854         map_vector_to_rxq(adapter, 0, 0);
1855         map_vector_to_txq(adapter, 0, 0);
1856
1857         DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1858 }
1859
1860 /**
1861  * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1862  * @adapter: board private structure
1863  *
1864  * Configure the Tx unit of the MAC after a reset.
1865  **/
1866 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1867 {
1868         u64 tdba;
1869         struct ixgbe_hw *hw = &adapter->hw;
1870         u32 i, j, tdlen, txctrl;
1871
1872         /* Setup the HW Tx Head and Tail descriptor pointers */
1873         for (i = 0; i < adapter->num_tx_queues; i++) {
1874                 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1875                 j = ring->reg_idx;
1876                 tdba = ring->dma;
1877                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1878                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1879                                 (tdba & DMA_BIT_MASK(32)));
1880                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1881                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1882                 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1883                 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1884                 adapter->tx_ring[i].head = IXGBE_TDH(j);
1885                 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1886                 /* Disable Tx Head Writeback RO bit, since this hoses
1887                  * bookkeeping if things aren't delivered in order.
1888                  */
1889                 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1890                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1891                 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1892         }
1893         if (hw->mac.type == ixgbe_mac_82599EB) {
1894                 /* We enable 8 traffic classes, DCB only */
1895                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1896                         IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1897                                         IXGBE_MTQC_8TC_8TQ));
1898         }
1899 }
1900
1901 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1902
1903 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1904                                    struct ixgbe_ring *rx_ring)
1905 {
1906         u32 srrctl;
1907         int index;
1908         struct ixgbe_ring_feature *feature = adapter->ring_feature;
1909
1910         index = rx_ring->reg_idx;
1911         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1912                 unsigned long mask;
1913                 mask = (unsigned long) feature[RING_F_RSS].mask;
1914                 index = index & mask;
1915         }
1916         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1917
1918         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1919         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1920
1921         srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1922                   IXGBE_SRRCTL_BSIZEHDR_MASK;
1923
1924         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1925 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1926                 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1927 #else
1928                 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1929 #endif
1930                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1931         } else {
1932                 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1933                           IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1934                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1935         }
1936
1937         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1938 }
1939
1940 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1941 {
1942         u32 mrqc = 0;
1943         int mask;
1944
1945         if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1946                 return mrqc;
1947
1948         mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1949 #ifdef CONFIG_IXGBE_DCB
1950                                  | IXGBE_FLAG_DCB_ENABLED
1951 #endif
1952                                 );
1953
1954         switch (mask) {
1955         case (IXGBE_FLAG_RSS_ENABLED):
1956                 mrqc = IXGBE_MRQC_RSSEN;
1957                 break;
1958 #ifdef CONFIG_IXGBE_DCB
1959         case (IXGBE_FLAG_DCB_ENABLED):
1960                 mrqc = IXGBE_MRQC_RT8TCEN;
1961                 break;
1962 #endif /* CONFIG_IXGBE_DCB */
1963         default:
1964                 break;
1965         }
1966
1967         return mrqc;
1968 }
1969
1970 /**
1971  * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1972  * @adapter: board private structure
1973  *
1974  * Configure the Rx unit of the MAC after a reset.
1975  **/
1976 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1977 {
1978         u64 rdba;
1979         struct ixgbe_hw *hw = &adapter->hw;
1980         struct ixgbe_ring *rx_ring;
1981         struct net_device *netdev = adapter->netdev;
1982         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1983         int i, j;
1984         u32 rdlen, rxctrl, rxcsum;
1985         static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1986                           0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1987                           0x6A3E67EA, 0x14364D17, 0x3BED200D};
1988         u32 fctrl, hlreg0;
1989         u32 reta = 0, mrqc = 0;
1990         u32 rdrxctl;
1991         u32 rscctrl;
1992         int rx_buf_len;
1993
1994         /* Decide whether to use packet split mode or not */
1995         adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1996
1997         /* Set the RX buffer length according to the mode */
1998         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1999                 rx_buf_len = IXGBE_RX_HDR_SIZE;
2000                 if (hw->mac.type == ixgbe_mac_82599EB) {
2001                         /* PSRTYPE must be initialized in 82599 */
2002                         u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2003                                       IXGBE_PSRTYPE_UDPHDR |
2004                                       IXGBE_PSRTYPE_IPV4HDR |
2005                                       IXGBE_PSRTYPE_IPV6HDR |
2006                                       IXGBE_PSRTYPE_L2HDR;
2007                         IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2008                 }
2009         } else {
2010                 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2011                     (netdev->mtu <= ETH_DATA_LEN))
2012                         rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2013                 else
2014                         rx_buf_len = ALIGN(max_frame, 1024);
2015         }
2016
2017         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2018         fctrl |= IXGBE_FCTRL_BAM;
2019         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2020         fctrl |= IXGBE_FCTRL_PMCF;
2021         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2022
2023         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2024         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2025                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2026         else
2027                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2028 #ifdef IXGBE_FCOE
2029         if (netdev->features & NETIF_F_FCOE_MTU)
2030                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2031 #endif
2032         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2033
2034         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2035         /* disable receives while setting up the descriptors */
2036         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2037         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2038
2039         /*
2040          * Setup the HW Rx Head and Tail Descriptor Pointers and
2041          * the Base and Length of the Rx Descriptor Ring
2042          */
2043         for (i = 0; i < adapter->num_rx_queues; i++) {
2044                 rx_ring = &adapter->rx_ring[i];
2045                 rdba = rx_ring->dma;
2046                 j = rx_ring->reg_idx;
2047                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2048                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2049                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2050                 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2051                 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2052                 rx_ring->head = IXGBE_RDH(j);
2053                 rx_ring->tail = IXGBE_RDT(j);
2054                 rx_ring->rx_buf_len = rx_buf_len;
2055
2056                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2057                         rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2058
2059 #ifdef IXGBE_FCOE
2060                 if (netdev->features & NETIF_F_FCOE_MTU) {
2061                         struct ixgbe_ring_feature *f;
2062                         f = &adapter->ring_feature[RING_F_FCOE];
2063                         if ((i >= f->mask) && (i < f->mask + f->indices)) {
2064                                 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2065                                 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2066                                         rx_ring->rx_buf_len =
2067                                                 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2068                         }
2069                 }
2070
2071 #endif /* IXGBE_FCOE */
2072                 ixgbe_configure_srrctl(adapter, rx_ring);
2073         }
2074
2075         if (hw->mac.type == ixgbe_mac_82598EB) {
2076                 /*
2077                  * For VMDq support of different descriptor types or
2078                  * buffer sizes through the use of multiple SRRCTL
2079                  * registers, RDRXCTL.MVMEN must be set to 1
2080                  *
2081                  * also, the manual doesn't mention it clearly but DCA hints
2082                  * will only use queue 0's tags unless this bit is set.  Side
2083                  * effects of setting this bit are only that SRRCTL must be
2084                  * fully programmed [0..15]
2085                  */
2086                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2087                 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2088                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2089         }
2090
2091         /* Program MRQC for the distribution of queues */
2092         mrqc = ixgbe_setup_mrqc(adapter);
2093
2094         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2095                 /* Fill out redirection table */
2096                 for (i = 0, j = 0; i < 128; i++, j++) {
2097                         if (j == adapter->ring_feature[RING_F_RSS].indices)
2098                                 j = 0;
2099                         /* reta = 4-byte sliding window of
2100                          * 0x00..(indices-1)(indices-1)00..etc. */
2101                         reta = (reta << 8) | (j * 0x11);
2102                         if ((i & 3) == 3)
2103                                 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2104                 }
2105
2106                 /* Fill out hash function seeds */
2107                 for (i = 0; i < 10; i++)
2108                         IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2109
2110                 if (hw->mac.type == ixgbe_mac_82598EB)
2111                         mrqc |= IXGBE_MRQC_RSSEN;
2112                     /* Perform hash on these packet types */
2113                 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2114                       | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2115                       | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2116                       | IXGBE_MRQC_RSS_FIELD_IPV6
2117                       | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2118                       | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2119         }
2120         IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2121
2122         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2123
2124         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2125             adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2126                 /* Disable indicating checksum in descriptor, enables
2127                  * RSS hash */
2128                 rxcsum |= IXGBE_RXCSUM_PCSD;
2129         }
2130         if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2131                 /* Enable IPv4 payload checksum for UDP fragments
2132                  * if PCSD is not set */
2133                 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2134         }
2135
2136         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2137
2138         if (hw->mac.type == ixgbe_mac_82599EB) {
2139                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2140                 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2141                 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2142                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2143         }
2144
2145         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2146                 /* Enable 82599 HW-RSC */
2147                 for (i = 0; i < adapter->num_rx_queues; i++) {
2148                         rx_ring = &adapter->rx_ring[i];
2149                         j = rx_ring->reg_idx;
2150                         rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2151                         rscctrl |= IXGBE_RSCCTL_RSCEN;
2152                         /*
2153                          * we must limit the number of descriptors so that the
2154                          * total size of max desc * buf_len is not greater
2155                          * than 65535
2156                          */
2157                         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2158 #if (MAX_SKB_FRAGS > 16)
2159                                 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2160 #elif (MAX_SKB_FRAGS > 8)
2161                                 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2162 #elif (MAX_SKB_FRAGS > 4)
2163                                 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2164 #else
2165                                 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2166 #endif
2167                         } else {
2168                                 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2169                                         rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2170                                 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2171                                         rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2172                                 else
2173                                         rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2174                         }
2175                         IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2176                 }
2177                 /* Disable RSC for ACK packets */
2178                 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2179                    (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2180         }
2181 }
2182
2183 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2184 {
2185         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2186         struct ixgbe_hw *hw = &adapter->hw;
2187
2188         /* add VID to filter table */
2189         hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2190 }
2191
2192 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2193 {
2194         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2195         struct ixgbe_hw *hw = &adapter->hw;
2196
2197         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2198                 ixgbe_irq_disable(adapter);
2199
2200         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2201
2202         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2203                 ixgbe_irq_enable(adapter);
2204
2205         /* remove VID from filter table */
2206         hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2207 }
2208
2209 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2210                                    struct vlan_group *grp)
2211 {
2212         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2213         u32 ctrl;
2214         int i, j;
2215
2216         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2217                 ixgbe_irq_disable(adapter);
2218         adapter->vlgrp = grp;
2219
2220         /*
2221          * For a DCB driver, always enable VLAN tag stripping so we can
2222          * still receive traffic from a DCB-enabled host even if we're
2223          * not in DCB mode.
2224          */
2225         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2226         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2227                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2228                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2229                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2230         } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2231                 ctrl |= IXGBE_VLNCTRL_VFE;
2232                 /* enable VLAN tag insert/strip */
2233                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2234                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2235                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2236                 for (i = 0; i < adapter->num_rx_queues; i++) {
2237                         j = adapter->rx_ring[i].reg_idx;
2238                         ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2239                         ctrl |= IXGBE_RXDCTL_VME;
2240                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2241                 }
2242         }
2243         ixgbe_vlan_rx_add_vid(netdev, 0);
2244
2245         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2246                 ixgbe_irq_enable(adapter);
2247 }
2248
2249 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2250 {
2251         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2252
2253         if (adapter->vlgrp) {
2254                 u16 vid;
2255                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2256                         if (!vlan_group_get_device(adapter->vlgrp, vid))
2257                                 continue;
2258                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2259                 }
2260         }
2261 }
2262
2263 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2264 {
2265         struct dev_mc_list *mc_ptr;
2266         u8 *addr = *mc_addr_ptr;
2267         *vmdq = 0;
2268
2269         mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2270         if (mc_ptr->next)
2271                 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2272         else
2273                 *mc_addr_ptr = NULL;
2274
2275         return addr;
2276 }
2277
2278 /**
2279  * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2280  * @netdev: network interface device structure
2281  *
2282  * The set_rx_method entry point is called whenever the unicast/multicast
2283  * address list or the network interface flags are updated.  This routine is
2284  * responsible for configuring the hardware for proper unicast, multicast and
2285  * promiscuous mode.
2286  **/
2287 static void ixgbe_set_rx_mode(struct net_device *netdev)
2288 {
2289         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2290         struct ixgbe_hw *hw = &adapter->hw;
2291         u32 fctrl, vlnctrl;
2292         u8 *addr_list = NULL;
2293         int addr_count = 0;
2294
2295         /* Check for Promiscuous and All Multicast modes */
2296
2297         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2298         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2299
2300         if (netdev->flags & IFF_PROMISC) {
2301                 hw->addr_ctrl.user_set_promisc = 1;
2302                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2303                 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2304         } else {
2305                 if (netdev->flags & IFF_ALLMULTI) {
2306                         fctrl |= IXGBE_FCTRL_MPE;
2307                         fctrl &= ~IXGBE_FCTRL_UPE;
2308                 } else {
2309                         fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2310                 }
2311                 vlnctrl |= IXGBE_VLNCTRL_VFE;
2312                 hw->addr_ctrl.user_set_promisc = 0;
2313         }
2314
2315         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2316         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2317
2318         /* reprogram secondary unicast list */
2319         hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2320
2321         /* reprogram multicast list */
2322         addr_count = netdev->mc_count;
2323         if (addr_count)
2324                 addr_list = netdev->mc_list->dmi_addr;
2325         hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2326                                         ixgbe_addr_list_itr);
2327 }
2328
2329 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2330 {
2331         int q_idx;
2332         struct ixgbe_q_vector *q_vector;
2333         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2334
2335         /* legacy and MSI only use one vector */
2336         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2337                 q_vectors = 1;
2338
2339         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2340                 struct napi_struct *napi;
2341                 q_vector = adapter->q_vector[q_idx];
2342                 napi = &q_vector->napi;
2343                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2344                         if (!q_vector->rxr_count || !q_vector->txr_count) {
2345                                 if (q_vector->txr_count == 1)
2346                                         napi->poll = &ixgbe_clean_txonly;
2347                                 else if (q_vector->rxr_count == 1)
2348                                         napi->poll = &ixgbe_clean_rxonly;
2349                         }
2350                 }
2351
2352                 napi_enable(napi);
2353         }
2354 }
2355
2356 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2357 {
2358         int q_idx;
2359         struct ixgbe_q_vector *q_vector;
2360         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2361
2362         /* legacy and MSI only use one vector */
2363         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2364                 q_vectors = 1;
2365
2366         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2367                 q_vector = adapter->q_vector[q_idx];
2368                 napi_disable(&q_vector->napi);
2369         }
2370 }
2371
2372 #ifdef CONFIG_IXGBE_DCB
2373 /*
2374  * ixgbe_configure_dcb - Configure DCB hardware
2375  * @adapter: ixgbe adapter struct
2376  *
2377  * This is called by the driver on open to configure the DCB hardware.
2378  * This is also called by the gennetlink interface when reconfiguring
2379  * the DCB state.
2380  */
2381 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2382 {
2383         struct ixgbe_hw *hw = &adapter->hw;
2384         u32 txdctl, vlnctrl;
2385         int i, j;
2386
2387         ixgbe_dcb_check_config(&adapter->dcb_cfg);
2388         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2389         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2390
2391         /* reconfigure the hardware */
2392         ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2393
2394         for (i = 0; i < adapter->num_tx_queues; i++) {
2395                 j = adapter->tx_ring[i].reg_idx;
2396                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2397                 /* PThresh workaround for Tx hang with DFP enabled. */
2398                 txdctl |= 32;
2399                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2400         }
2401         /* Enable VLAN tag insert/strip */
2402         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2403         if (hw->mac.type == ixgbe_mac_82598EB) {
2404                 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2405                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2406                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2407         } else if (hw->mac.type == ixgbe_mac_82599EB) {
2408                 vlnctrl |= IXGBE_VLNCTRL_VFE;
2409                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2410                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2411                 for (i = 0; i < adapter->num_rx_queues; i++) {
2412                         j = adapter->rx_ring[i].reg_idx;
2413                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2414                         vlnctrl |= IXGBE_RXDCTL_VME;
2415                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2416                 }
2417         }
2418         hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2419 }
2420
2421 #endif
2422 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2423 {
2424         struct net_device *netdev = adapter->netdev;
2425         struct ixgbe_hw *hw = &adapter->hw;
2426         int i;
2427
2428         ixgbe_set_rx_mode(netdev);
2429
2430         ixgbe_restore_vlan(adapter);
2431 #ifdef CONFIG_IXGBE_DCB
2432         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2433                 netif_set_gso_max_size(netdev, 32768);
2434                 ixgbe_configure_dcb(adapter);
2435         } else {
2436                 netif_set_gso_max_size(netdev, 65536);
2437         }
2438 #else
2439         netif_set_gso_max_size(netdev, 65536);
2440 #endif
2441
2442 #ifdef IXGBE_FCOE
2443         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2444                 ixgbe_configure_fcoe(adapter);
2445
2446 #endif /* IXGBE_FCOE */
2447         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2448                 for (i = 0; i < adapter->num_tx_queues; i++)
2449                         adapter->tx_ring[i].atr_sample_rate =
2450                                                        adapter->atr_sample_rate;
2451                 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2452         } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2453                 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2454         }
2455
2456         ixgbe_configure_tx(adapter);
2457         ixgbe_configure_rx(adapter);
2458         for (i = 0; i < adapter->num_rx_queues; i++)
2459                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2460                                        (adapter->rx_ring[i].count - 1));
2461 }
2462
2463 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2464 {
2465         switch (hw->phy.type) {
2466         case ixgbe_phy_sfp_avago:
2467         case ixgbe_phy_sfp_ftl:
2468         case ixgbe_phy_sfp_intel:
2469         case ixgbe_phy_sfp_unknown:
2470         case ixgbe_phy_tw_tyco:
2471         case ixgbe_phy_tw_unknown:
2472                 return true;
2473         default:
2474                 return false;
2475         }
2476 }
2477
2478 /**
2479  * ixgbe_sfp_link_config - set up SFP+ link
2480  * @adapter: pointer to private adapter struct
2481  **/
2482 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2483 {
2484         struct ixgbe_hw *hw = &adapter->hw;
2485
2486                 if (hw->phy.multispeed_fiber) {
2487                         /*
2488                          * In multispeed fiber setups, the device may not have
2489                          * had a physical connection when the driver loaded.
2490                          * If that's the case, the initial link configuration
2491                          * couldn't get the MAC into 10G or 1G mode, so we'll
2492                          * never have a link status change interrupt fire.
2493                          * We need to try and force an autonegotiation
2494                          * session, then bring up link.
2495                          */
2496                         hw->mac.ops.setup_sfp(hw);
2497                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2498                                 schedule_work(&adapter->multispeed_fiber_task);
2499                 } else {
2500                         /*
2501                          * Direct Attach Cu and non-multispeed fiber modules
2502                          * still need to be configured properly prior to
2503                          * attempting link.
2504                          */
2505                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2506                                 schedule_work(&adapter->sfp_config_module_task);
2507                 }
2508 }
2509
2510 /**
2511  * ixgbe_non_sfp_link_config - set up non-SFP+ link
2512  * @hw: pointer to private hardware struct
2513  *
2514  * Returns 0 on success, negative on failure
2515  **/
2516 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2517 {
2518         u32 autoneg;
2519         bool negotiation, link_up = false;
2520         u32 ret = IXGBE_ERR_LINK_SETUP;
2521
2522         if (hw->mac.ops.check_link)
2523                 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2524
2525         if (ret)
2526                 goto link_cfg_out;
2527
2528         if (hw->mac.ops.get_link_capabilities)
2529                 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2530         if (ret)
2531                 goto link_cfg_out;
2532
2533         if (hw->mac.ops.setup_link)
2534                 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2535 link_cfg_out:
2536         return ret;
2537 }
2538
2539 #define IXGBE_MAX_RX_DESC_POLL 10
2540 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2541                                               int rxr)
2542 {
2543         int j = adapter->rx_ring[rxr].reg_idx;
2544         int k;
2545
2546         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2547                 if (IXGBE_READ_REG(&adapter->hw,
2548                                    IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2549                         break;
2550                 else
2551                         msleep(1);
2552         }
2553         if (k >= IXGBE_MAX_RX_DESC_POLL) {
2554                 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2555                         "not set within the polling period\n", rxr);
2556         }
2557         ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2558                               (adapter->rx_ring[rxr].count - 1));
2559 }
2560
2561 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2562 {
2563         struct net_device *netdev = adapter->netdev;
2564         struct ixgbe_hw *hw = &adapter->hw;
2565         int i, j = 0;
2566         int num_rx_rings = adapter->num_rx_queues;
2567         int err;
2568         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2569         u32 txdctl, rxdctl, mhadd;
2570         u32 dmatxctl;
2571         u32 gpie;
2572
2573         ixgbe_get_hw_control(adapter);
2574
2575         if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2576             (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2577                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2578                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2579                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2580                 } else {
2581                         /* MSI only */
2582                         gpie = 0;
2583                 }
2584                 /* XXX: to interrupt immediately for EICS writes, enable this */
2585                 /* gpie |= IXGBE_GPIE_EIMEN; */
2586                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2587         }
2588
2589         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2590                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2591                  * specifically only auto mask tx and rx interrupts */
2592                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2593         }
2594
2595         /* Enable fan failure interrupt if media type is copper */
2596         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2597                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2598                 gpie |= IXGBE_SDP1_GPIEN;
2599                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2600         }
2601
2602         if (hw->mac.type == ixgbe_mac_82599EB) {
2603                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2604                 gpie |= IXGBE_SDP1_GPIEN;
2605                 gpie |= IXGBE_SDP2_GPIEN;
2606                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2607         }
2608
2609 #ifdef IXGBE_FCOE
2610         /* adjust max frame to be able to do baby jumbo for FCoE */
2611         if ((netdev->features & NETIF_F_FCOE_MTU) &&
2612             (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2613                 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2614
2615 #endif /* IXGBE_FCOE */
2616         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2617         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2618                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2619                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2620
2621                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2622         }
2623
2624         for (i = 0; i < adapter->num_tx_queues; i++) {
2625                 j = adapter->tx_ring[i].reg_idx;
2626                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2627                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2628                 txdctl |= (8 << 16);
2629                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2630         }
2631
2632         if (hw->mac.type == ixgbe_mac_82599EB) {
2633                 /* DMATXCTL.EN must be set after all Tx queue config is done */
2634                 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2635                 dmatxctl |= IXGBE_DMATXCTL_TE;
2636                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2637         }
2638         for (i = 0; i < adapter->num_tx_queues; i++) {
2639                 j = adapter->tx_ring[i].reg_idx;
2640                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2641                 txdctl |= IXGBE_TXDCTL_ENABLE;
2642                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2643         }
2644
2645         for (i = 0; i < num_rx_rings; i++) {
2646                 j = adapter->rx_ring[i].reg_idx;
2647                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2648                 /* enable PTHRESH=32 descriptors (half the internal cache)
2649                  * and HTHRESH=0 descriptors (to minimize latency on fetch),
2650                  * this also removes a pesky rx_no_buffer_count increment */
2651                 rxdctl |= 0x0020;
2652                 rxdctl |= IXGBE_RXDCTL_ENABLE;
2653                 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2654                 if (hw->mac.type == ixgbe_mac_82599EB)
2655                         ixgbe_rx_desc_queue_enable(adapter, i);
2656         }
2657         /* enable all receives */
2658         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2659         if (hw->mac.type == ixgbe_mac_82598EB)
2660                 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2661         else
2662                 rxdctl |= IXGBE_RXCTRL_RXEN;
2663         hw->mac.ops.enable_rx_dma(hw, rxdctl);
2664
2665         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2666                 ixgbe_configure_msix(adapter);
2667         else
2668                 ixgbe_configure_msi_and_legacy(adapter);
2669
2670         clear_bit(__IXGBE_DOWN, &adapter->state);
2671         ixgbe_napi_enable_all(adapter);
2672
2673         /* clear any pending interrupts, may auto mask */
2674         IXGBE_READ_REG(hw, IXGBE_EICR);
2675
2676         ixgbe_irq_enable(adapter);
2677
2678         /*
2679          * If this adapter has a fan, check to see if we had a failure
2680          * before we enabled the interrupt.
2681          */
2682         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2683                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2684                 if (esdp & IXGBE_ESDP_SDP1)
2685                         DPRINTK(DRV, CRIT,
2686                                 "Fan has stopped, replace the adapter\n");
2687         }
2688
2689         /*
2690          * For hot-pluggable SFP+ devices, a new SFP+ module may have
2691          * arrived before interrupts were enabled but after probe.  Such
2692          * devices wouldn't have their type identified yet. We need to
2693          * kick off the SFP+ module setup first, then try to bring up link.
2694          * If we're not hot-pluggable SFP+, we just need to configure link
2695          * and bring it up.
2696          */
2697         if (hw->phy.type == ixgbe_phy_unknown) {
2698                 err = hw->phy.ops.identify(hw);
2699                 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2700                         /*
2701                          * Take the device down and schedule the sfp tasklet
2702                          * which will unregister_netdev and log it.
2703                          */
2704                         ixgbe_down(adapter);
2705                         schedule_work(&adapter->sfp_config_module_task);
2706                         return err;
2707                 }
2708         }
2709
2710         if (ixgbe_is_sfp(hw)) {
2711                 ixgbe_sfp_link_config(adapter);
2712         } else {
2713                 err = ixgbe_non_sfp_link_config(hw);
2714                 if (err)
2715                         DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2716         }
2717
2718         for (i = 0; i < adapter->num_tx_queues; i++)
2719                 set_bit(__IXGBE_FDIR_INIT_DONE,
2720                         &(adapter->tx_ring[i].reinit_state));
2721
2722         /* enable transmits */
2723         netif_tx_start_all_queues(netdev);
2724
2725         /* bring the link up in the watchdog, this could race with our first
2726          * link up interrupt but shouldn't be a problem */
2727         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2728         adapter->link_check_timeout = jiffies;
2729         mod_timer(&adapter->watchdog_timer, jiffies);
2730         return 0;
2731 }
2732
2733 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2734 {
2735         WARN_ON(in_interrupt());
2736         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2737                 msleep(1);
2738         ixgbe_down(adapter);
2739         ixgbe_up(adapter);
2740         clear_bit(__IXGBE_RESETTING, &adapter->state);
2741 }
2742
2743 int ixgbe_up(struct ixgbe_adapter *adapter)
2744 {
2745         /* hardware has been reset, we need to reload some things */
2746         ixgbe_configure(adapter);
2747
2748         return ixgbe_up_complete(adapter);
2749 }
2750
2751 void ixgbe_reset(struct ixgbe_adapter *adapter)
2752 {
2753         struct ixgbe_hw *hw = &adapter->hw;
2754         int err;
2755
2756         err = hw->mac.ops.init_hw(hw);
2757         switch (err) {
2758         case 0:
2759         case IXGBE_ERR_SFP_NOT_PRESENT:
2760                 break;
2761         case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2762                 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2763                 break;
2764         case IXGBE_ERR_EEPROM_VERSION:
2765                 /* We are running on a pre-production device, log a warning */
2766                 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2767                          "adapter/LOM.  Please be aware there may be issues "
2768                          "associated with your hardware.  If you are "
2769                          "experiencing problems please contact your Intel or "
2770                          "hardware representative who provided you with this "
2771                          "hardware.\n");
2772                 break;
2773         default:
2774                 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2775         }
2776
2777         /* reprogram the RAR[0] in case user changed it. */
2778         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2779 }
2780
2781 /**
2782  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2783  * @adapter: board private structure
2784  * @rx_ring: ring to free buffers from
2785  **/
2786 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2787                                 struct ixgbe_ring *rx_ring)
2788 {
2789         struct pci_dev *pdev = adapter->pdev;
2790         unsigned long size;
2791         unsigned int i;
2792
2793         /* Free all the Rx ring sk_buffs */
2794
2795         for (i = 0; i < rx_ring->count; i++) {
2796                 struct ixgbe_rx_buffer *rx_buffer_info;
2797
2798                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2799                 if (rx_buffer_info->dma) {
2800                         pci_unmap_single(pdev, rx_buffer_info->dma,
2801                                          rx_ring->rx_buf_len,
2802                                          PCI_DMA_FROMDEVICE);
2803                         rx_buffer_info->dma = 0;
2804                 }
2805                 if (rx_buffer_info->skb) {
2806                         struct sk_buff *skb = rx_buffer_info->skb;
2807                         rx_buffer_info->skb = NULL;
2808                         do {
2809                                 struct sk_buff *this = skb;
2810                                 skb = skb->prev;
2811                                 dev_kfree_skb(this);
2812                         } while (skb);
2813                 }
2814                 if (!rx_buffer_info->page)
2815                         continue;
2816                 if (rx_buffer_info->page_dma) {
2817                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
2818                                        PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2819                         rx_buffer_info->page_dma = 0;
2820                 }
2821                 put_page(rx_buffer_info->page);
2822                 rx_buffer_info->page = NULL;
2823                 rx_buffer_info->page_offset = 0;
2824         }
2825
2826         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2827         memset(rx_ring->rx_buffer_info, 0, size);
2828
2829         /* Zero out the descriptor ring */
2830         memset(rx_ring->desc, 0, rx_ring->size);
2831
2832         rx_ring->next_to_clean = 0;
2833         rx_ring->next_to_use = 0;
2834
2835         if (rx_ring->head)
2836                 writel(0, adapter->hw.hw_addr + rx_ring->head);
2837         if (rx_ring->tail)
2838                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2839 }
2840
2841 /**
2842  * ixgbe_clean_tx_ring - Free Tx Buffers
2843  * @adapter: board private structure
2844  * @tx_ring: ring to be cleaned
2845  **/
2846 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2847                                 struct ixgbe_ring *tx_ring)
2848 {
2849         struct ixgbe_tx_buffer *tx_buffer_info;
2850         unsigned long size;
2851         unsigned int i;
2852
2853         /* Free all the Tx ring sk_buffs */
2854
2855         for (i = 0; i < tx_ring->count; i++) {
2856                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2857                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2858         }
2859
2860         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2861         memset(tx_ring->tx_buffer_info, 0, size);
2862
2863         /* Zero out the descriptor ring */
2864         memset(tx_ring->desc, 0, tx_ring->size);
2865
2866         tx_ring->next_to_use = 0;
2867         tx_ring->next_to_clean = 0;
2868
2869         if (tx_ring->head)
2870                 writel(0, adapter->hw.hw_addr + tx_ring->head);
2871         if (tx_ring->tail)
2872                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2873 }
2874
2875 /**
2876  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2877  * @adapter: board private structure
2878  **/
2879 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2880 {
2881         int i;
2882
2883         for (i = 0; i < adapter->num_rx_queues; i++)
2884                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2885 }
2886
2887 /**
2888  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2889  * @adapter: board private structure
2890  **/
2891 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2892 {
2893         int i;
2894
2895         for (i = 0; i < adapter->num_tx_queues; i++)
2896                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2897 }
2898
2899 void ixgbe_down(struct ixgbe_adapter *adapter)
2900 {
2901         struct net_device *netdev = adapter->netdev;
2902         struct ixgbe_hw *hw = &adapter->hw;
2903         u32 rxctrl;
2904         u32 txdctl;
2905         int i, j;
2906
2907         /* signal that we are down to the interrupt handler */
2908         set_bit(__IXGBE_DOWN, &adapter->state);
2909
2910         /* disable receives */
2911         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2912         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2913
2914         netif_tx_disable(netdev);
2915
2916         IXGBE_WRITE_FLUSH(hw);
2917         msleep(10);
2918
2919         netif_tx_stop_all_queues(netdev);
2920
2921         ixgbe_irq_disable(adapter);
2922
2923         ixgbe_napi_disable_all(adapter);
2924
2925         del_timer_sync(&adapter->watchdog_timer);
2926         cancel_work_sync(&adapter->watchdog_task);
2927
2928         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2929             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2930                 cancel_work_sync(&adapter->fdir_reinit_task);
2931
2932         /* disable transmits in the hardware now that interrupts are off */
2933         for (i = 0; i < adapter->num_tx_queues; i++) {
2934                 j = adapter->tx_ring[i].reg_idx;
2935                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2936                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2937                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2938         }
2939         /* Disable the Tx DMA engine on 82599 */
2940         if (hw->mac.type == ixgbe_mac_82599EB)
2941                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2942                                 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2943                                  ~IXGBE_DMATXCTL_TE));
2944
2945         netif_carrier_off(netdev);
2946
2947         if (!pci_channel_offline(adapter->pdev))
2948                 ixgbe_reset(adapter);
2949         ixgbe_clean_all_tx_rings(adapter);
2950         ixgbe_clean_all_rx_rings(adapter);
2951
2952 #ifdef CONFIG_IXGBE_DCA
2953         /* since we reset the hardware DCA settings were cleared */
2954         ixgbe_setup_dca(adapter);
2955 #endif
2956 }
2957
2958 /**
2959  * ixgbe_poll - NAPI Rx polling callback
2960  * @napi: structure for representing this polling device
2961  * @budget: how many packets driver is allowed to clean
2962  *
2963  * This function is used for legacy and MSI, NAPI mode
2964  **/
2965 static int ixgbe_poll(struct napi_struct *napi, int budget)
2966 {
2967         struct ixgbe_q_vector *q_vector =
2968                                 container_of(napi, struct ixgbe_q_vector, napi);
2969         struct ixgbe_adapter *adapter = q_vector->adapter;
2970         int tx_clean_complete, work_done = 0;
2971
2972 #ifdef CONFIG_IXGBE_DCA
2973         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2974                 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2975                 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2976         }
2977 #endif
2978
2979         tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
2980         ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
2981
2982         if (!tx_clean_complete)
2983                 work_done = budget;
2984
2985         /* If budget not fully consumed, exit the polling mode */
2986         if (work_done < budget) {
2987                 napi_complete(napi);
2988                 if (adapter->itr_setting & 1)
2989                         ixgbe_set_itr(adapter);
2990                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2991                         ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
2992         }
2993         return work_done;
2994 }
2995
2996 /**
2997  * ixgbe_tx_timeout - Respond to a Tx Hang
2998  * @netdev: network interface device structure
2999  **/
3000 static void ixgbe_tx_timeout(struct net_device *netdev)
3001 {
3002         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3003
3004         /* Do the reset outside of interrupt context */
3005         schedule_work(&adapter->reset_task);
3006 }
3007
3008 static void ixgbe_reset_task(struct work_struct *work)
3009 {
3010         struct ixgbe_adapter *adapter;
3011         adapter = container_of(work, struct ixgbe_adapter, reset_task);
3012
3013         /* If we're already down or resetting, just bail */
3014         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3015             test_bit(__IXGBE_RESETTING, &adapter->state))
3016                 return;
3017
3018         adapter->tx_timeout_count++;
3019
3020         ixgbe_reinit_locked(adapter);
3021 }
3022
3023 #ifdef CONFIG_IXGBE_DCB
3024 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3025 {
3026         bool ret = false;
3027         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3028
3029         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3030                 return ret;
3031
3032         f->mask = 0x7 << 3;
3033         adapter->num_rx_queues = f->indices;
3034         adapter->num_tx_queues = f->indices;
3035         ret = true;
3036
3037         return ret;
3038 }
3039 #endif
3040
3041 /**
3042  * ixgbe_set_rss_queues: Allocate queues for RSS
3043  * @adapter: board private structure to initialize
3044  *
3045  * This is our "base" multiqueue mode.  RSS (Receive Side Scaling) will try
3046  * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3047  *
3048  **/
3049 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3050 {
3051         bool ret = false;
3052         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3053
3054         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3055                 f->mask = 0xF;
3056                 adapter->num_rx_queues = f->indices;
3057                 adapter->num_tx_queues = f->indices;
3058                 ret = true;
3059         } else {
3060                 ret = false;
3061         }
3062
3063         return ret;
3064 }
3065
3066 /**
3067  * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3068  * @adapter: board private structure to initialize
3069  *
3070  * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3071  * to the original CPU that initiated the Tx session.  This runs in addition
3072  * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3073  * Rx load across CPUs using RSS.
3074  *
3075  **/
3076 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3077 {
3078         bool ret = false;
3079         struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3080
3081         f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3082         f_fdir->mask = 0;
3083
3084         /* Flow Director must have RSS enabled */
3085         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3086             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3087              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3088                 adapter->num_tx_queues = f_fdir->indices;
3089                 adapter->num_rx_queues = f_fdir->indices;
3090                 ret = true;
3091         } else {
3092                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3093                 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3094         }
3095         return ret;
3096 }
3097
3098 #ifdef IXGBE_FCOE
3099 /**
3100  * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3101  * @adapter: board private structure to initialize
3102  *
3103  * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3104  * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3105  * rx queues out of the max number of rx queues, instead, it is used as the
3106  * index of the first rx queue used by FCoE.
3107  *
3108  **/
3109 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3110 {
3111         bool ret = false;
3112         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3113
3114         f->indices = min((int)num_online_cpus(), f->indices);
3115         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3116 #ifdef CONFIG_IXGBE_DCB
3117                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3118                         DPRINTK(PROBE, INFO, "FCOE enabled with DCB \n");
3119                         ixgbe_set_dcb_queues(adapter);
3120                 }
3121 #endif
3122                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3123                         DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
3124                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3125                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3126                                 ixgbe_set_fdir_queues(adapter);
3127                         else
3128                                 ixgbe_set_rss_queues(adapter);
3129                 }
3130                 /* adding FCoE rx rings to the end */
3131                 f->mask = adapter->num_rx_queues;
3132                 adapter->num_rx_queues += f->indices;
3133                 if (adapter->num_tx_queues == 0)
3134                         adapter->num_tx_queues = f->indices;
3135
3136                 ret = true;
3137         }
3138
3139         return ret;
3140 }
3141
3142 #endif /* IXGBE_FCOE */
3143 /*
3144  * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3145  * @adapter: board private structure to initialize
3146  *
3147  * This is the top level queue allocation routine.  The order here is very
3148  * important, starting with the "most" number of features turned on at once,
3149  * and ending with the smallest set of features.  This way large combinations
3150  * can be allocated if they're turned on, and smaller combinations are the
3151  * fallthrough conditions.
3152  *
3153  **/
3154 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3155 {
3156 #ifdef IXGBE_FCOE
3157         if (ixgbe_set_fcoe_queues(adapter))
3158                 goto done;
3159
3160 #endif /* IXGBE_FCOE */
3161 #ifdef CONFIG_IXGBE_DCB
3162         if (ixgbe_set_dcb_queues(adapter))
3163                 goto done;
3164
3165 #endif
3166         if (ixgbe_set_fdir_queues(adapter))
3167                 goto done;
3168
3169         if (ixgbe_set_rss_queues(adapter))
3170                 goto done;
3171
3172         /* fallback to base case */
3173         adapter->num_rx_queues = 1;
3174         adapter->num_tx_queues = 1;
3175
3176 done:
3177         /* Notify the stack of the (possibly) reduced Tx Queue count. */
3178         adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3179 }
3180
3181 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3182                                        int vectors)
3183 {
3184         int err, vector_threshold;
3185
3186         /* We'll want at least 3 (vector_threshold):
3187          * 1) TxQ[0] Cleanup
3188          * 2) RxQ[0] Cleanup
3189          * 3) Other (Link Status Change, etc.)
3190          * 4) TCP Timer (optional)
3191          */
3192         vector_threshold = MIN_MSIX_COUNT;
3193
3194         /* The more we get, the more we will assign to Tx/Rx Cleanup
3195          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3196          * Right now, we simply care about how many we'll get; we'll
3197          * set them up later while requesting irq's.
3198          */
3199         while (vectors >= vector_threshold) {
3200                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3201                                       vectors);
3202                 if (!err) /* Success in acquiring all requested vectors. */
3203                         break;
3204                 else if (err < 0)
3205                         vectors = 0; /* Nasty failure, quit now */
3206                 else /* err == number of vectors we should try again with */
3207                         vectors = err;
3208         }
3209
3210         if (vectors < vector_threshold) {
3211                 /* Can't allocate enough MSI-X interrupts?  Oh well.
3212                  * This just means we'll go with either a single MSI
3213                  * vector or fall back to legacy interrupts.
3214                  */
3215                 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3216                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3217                 kfree(adapter->msix_entries);
3218                 adapter->msix_entries = NULL;
3219         } else {
3220                 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3221                 /*
3222                  * Adjust for only the vectors we'll use, which is minimum
3223                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3224                  * vectors we were allocated.
3225                  */
3226                 adapter->num_msix_vectors = min(vectors,
3227                                    adapter->max_msix_q_vectors + NON_Q_VECTORS);
3228         }
3229 }
3230
3231 /**
3232  * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3233  * @adapter: board private structure to initialize
3234  *
3235  * Cache the descriptor ring offsets for RSS to the assigned rings.
3236  *
3237  **/
3238 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3239 {
3240         int i;
3241         bool ret = false;
3242
3243         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3244                 for (i = 0; i < adapter->num_rx_queues; i++)
3245                         adapter->rx_ring[i].reg_idx = i;
3246                 for (i = 0; i < adapter->num_tx_queues; i++)
3247                         adapter->tx_ring[i].reg_idx = i;
3248                 ret = true;
3249         } else {
3250                 ret = false;
3251         }
3252
3253         return ret;
3254 }
3255
3256 #ifdef CONFIG_IXGBE_DCB
3257 /**
3258  * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3259  * @adapter: board private structure to initialize
3260  *
3261  * Cache the descriptor ring offsets for DCB to the assigned rings.
3262  *
3263  **/
3264 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3265 {
3266         int i;
3267         bool ret = false;
3268         int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3269
3270         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3271                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3272                         /* the number of queues is assumed to be symmetric */
3273                         for (i = 0; i < dcb_i; i++) {
3274                                 adapter->rx_ring[i].reg_idx = i << 3;
3275                                 adapter->tx_ring[i].reg_idx = i << 2;
3276                         }
3277                         ret = true;
3278                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3279                         if (dcb_i == 8) {
3280                                 /*
3281                                  * Tx TC0 starts at: descriptor queue 0
3282                                  * Tx TC1 starts at: descriptor queue 32
3283                                  * Tx TC2 starts at: descriptor queue 64
3284                                  * Tx TC3 starts at: descriptor queue 80
3285                                  * Tx TC4 starts at: descriptor queue 96
3286                                  * Tx TC5 starts at: descriptor queue 104
3287                                  * Tx TC6 starts at: descriptor queue 112
3288                                  * Tx TC7 starts at: descriptor queue 120
3289                                  *
3290                                  * Rx TC0-TC7 are offset by 16 queues each
3291                                  */
3292                                 for (i = 0; i < 3; i++) {
3293                                         adapter->tx_ring[i].reg_idx = i << 5;
3294                                         adapter->rx_ring[i].reg_idx = i << 4;
3295                                 }
3296                                 for ( ; i < 5; i++) {
3297                                         adapter->tx_ring[i].reg_idx =
3298                                                                  ((i + 2) << 4);
3299                                         adapter->rx_ring[i].reg_idx = i << 4;
3300                                 }
3301                                 for ( ; i < dcb_i; i++) {
3302                                         adapter->tx_ring[i].reg_idx =
3303                                                                  ((i + 8) << 3);
3304                                         adapter->rx_ring[i].reg_idx = i << 4;
3305                                 }
3306
3307                                 ret = true;
3308                         } else if (dcb_i == 4) {
3309                                 /*
3310                                  * Tx TC0 starts at: descriptor queue 0
3311                                  * Tx TC1 starts at: descriptor queue 64
3312                                  * Tx TC2 starts at: descriptor queue 96
3313                                  * Tx TC3 starts at: descriptor queue 112
3314                                  *
3315                                  * Rx TC0-TC3 are offset by 32 queues each
3316                                  */
3317                                 adapter->tx_ring[0].reg_idx = 0;
3318                                 adapter->tx_ring[1].reg_idx = 64;
3319                                 adapter->tx_ring[2].reg_idx = 96;
3320                                 adapter->tx_ring[3].reg_idx = 112;
3321                                 for (i = 0 ; i < dcb_i; i++)
3322                                         adapter->rx_ring[i].reg_idx = i << 5;
3323
3324                                 ret = true;
3325                         } else {
3326                                 ret = false;
3327                         }
3328                 } else {
3329                         ret = false;
3330                 }
3331         } else {
3332                 ret = false;
3333         }
3334
3335         return ret;
3336 }
3337 #endif
3338
3339 /**
3340  * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3341  * @adapter: board private structure to initialize
3342  *
3343  * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3344  *
3345  **/
3346 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3347 {
3348         int i;
3349         bool ret = false;
3350
3351         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3352             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3353              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3354                 for (i = 0; i < adapter->num_rx_queues; i++)
3355                         adapter->rx_ring[i].reg_idx = i;
3356                 for (i = 0; i < adapter->num_tx_queues; i++)
3357                         adapter->tx_ring[i].reg_idx = i;
3358                 ret = true;
3359         }
3360
3361         return ret;
3362 }
3363
3364 #ifdef IXGBE_FCOE
3365 /**
3366  * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3367  * @adapter: board private structure to initialize
3368  *
3369  * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3370  *
3371  */
3372 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3373 {
3374         int i, fcoe_i = 0;
3375         bool ret = false;
3376         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3377
3378         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3379 #ifdef CONFIG_IXGBE_DCB
3380                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3381                         ixgbe_cache_ring_dcb(adapter);
3382                         fcoe_i = adapter->rx_ring[0].reg_idx + 1;
3383                 }
3384 #endif /* CONFIG_IXGBE_DCB */
3385                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3386                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3387                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3388                                 ixgbe_cache_ring_fdir(adapter);
3389                         else
3390                                 ixgbe_cache_ring_rss(adapter);
3391
3392                         fcoe_i = f->mask;
3393                 }
3394                 for (i = 0; i < f->indices; i++, fcoe_i++)
3395                         adapter->rx_ring[f->mask + i].reg_idx = fcoe_i;
3396                 ret = true;
3397         }
3398         return ret;
3399 }
3400
3401 #endif /* IXGBE_FCOE */
3402 /**
3403  * ixgbe_cache_ring_register - Descriptor ring to register mapping
3404  * @adapter: board private structure to initialize
3405  *
3406  * Once we know the feature-set enabled for the device, we'll cache
3407  * the register offset the descriptor ring is assigned to.
3408  *
3409  * Note, the order the various feature calls is important.  It must start with
3410  * the "most" features enabled at the same time, then trickle down to the
3411  * least amount of features turned on at once.
3412  **/
3413 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3414 {
3415         /* start with default case */
3416         adapter->rx_ring[0].reg_idx = 0;
3417         adapter->tx_ring[0].reg_idx = 0;
3418
3419 #ifdef IXGBE_FCOE
3420         if (ixgbe_cache_ring_fcoe(adapter))
3421                 return;
3422
3423 #endif /* IXGBE_FCOE */
3424 #ifdef CONFIG_IXGBE_DCB
3425         if (ixgbe_cache_ring_dcb(adapter))
3426                 return;
3427
3428 #endif
3429         if (ixgbe_cache_ring_fdir(adapter))
3430                 return;
3431
3432         if (ixgbe_cache_ring_rss(adapter))
3433                 return;
3434 }
3435
3436 /**
3437  * ixgbe_alloc_queues - Allocate memory for all rings
3438  * @adapter: board private structure to initialize
3439  *
3440  * We allocate one ring per queue at run-time since we don't know the
3441  * number of queues at compile-time.  The polling_netdev array is
3442  * intended for Multiqueue, but should work fine with a single queue.
3443  **/
3444 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3445 {
3446         int i;
3447
3448         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3449                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
3450         if (!adapter->tx_ring)
3451                 goto err_tx_ring_allocation;
3452
3453         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3454                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
3455         if (!adapter->rx_ring)
3456                 goto err_rx_ring_allocation;
3457
3458         for (i = 0; i < adapter->num_tx_queues; i++) {
3459                 adapter->tx_ring[i].count = adapter->tx_ring_count;
3460                 adapter->tx_ring[i].queue_index = i;
3461         }
3462
3463         for (i = 0; i < adapter->num_rx_queues; i++) {
3464                 adapter->rx_ring[i].count = adapter->rx_ring_count;
3465                 adapter->rx_ring[i].queue_index = i;
3466         }
3467
3468         ixgbe_cache_ring_register(adapter);
3469
3470         return 0;
3471
3472 err_rx_ring_allocation:
3473         kfree(adapter->tx_ring);
3474 err_tx_ring_allocation:
3475         return -ENOMEM;
3476 }
3477
3478 /**
3479  * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3480  * @adapter: board private structure to initialize
3481  *
3482  * Attempt to configure the interrupts using the best available
3483  * capabilities of the hardware and the kernel.
3484  **/
3485 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3486 {
3487         struct ixgbe_hw *hw = &adapter->hw;
3488         int err = 0;
3489         int vector, v_budget;
3490
3491         /*
3492          * It's easy to be greedy for MSI-X vectors, but it really
3493          * doesn't do us much good if we have a lot more vectors
3494          * than CPU's.  So let's be conservative and only ask for
3495          * (roughly) twice the number of vectors as there are CPU's.
3496          */
3497         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3498                        (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3499
3500         /*
3501          * At the same time, hardware can only support a maximum of
3502          * hw.mac->max_msix_vectors vectors.  With features
3503          * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3504          * descriptor queues supported by our device.  Thus, we cap it off in
3505          * those rare cases where the cpu count also exceeds our vector limit.
3506          */
3507         v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3508
3509         /* A failure in MSI-X entry allocation isn't fatal, but it does
3510          * mean we disable MSI-X capabilities of the adapter. */
3511         adapter->msix_entries = kcalloc(v_budget,
3512                                         sizeof(struct msix_entry), GFP_KERNEL);
3513         if (adapter->msix_entries) {
3514                 for (vector = 0; vector < v_budget; vector++)
3515                         adapter->msix_entries[vector].entry = vector;
3516
3517                 ixgbe_acquire_msix_vectors(adapter, v_budget);
3518
3519                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3520                         goto out;
3521         }
3522
3523         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3524         adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3525         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3526         adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3527         adapter->atr_sample_rate = 0;
3528         ixgbe_set_num_queues(adapter);
3529
3530         err = pci_enable_msi(adapter->pdev);
3531         if (!err) {
3532                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3533         } else {
3534                 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3535                         "falling back to legacy.  Error: %d\n", err);
3536                 /* reset err */
3537                 err = 0;
3538         }
3539
3540 out:
3541         return err;
3542 }
3543
3544 /**
3545  * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3546  * @adapter: board private structure to initialize
3547  *
3548  * We allocate one q_vector per queue interrupt.  If allocation fails we
3549  * return -ENOMEM.
3550  **/
3551 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3552 {
3553         int q_idx, num_q_vectors;
3554         struct ixgbe_q_vector *q_vector;
3555         int napi_vectors;
3556         int (*poll)(struct napi_struct *, int);
3557
3558         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3559                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3560                 napi_vectors = adapter->num_rx_queues;
3561                 poll = &ixgbe_clean_rxtx_many;
3562         } else {
3563                 num_q_vectors = 1;
3564                 napi_vectors = 1;
3565                 poll = &ixgbe_poll;
3566         }
3567
3568         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3569                 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3570                 if (!q_vector)
3571                         goto err_out;
3572                 q_vector->adapter = adapter;
3573                 q_vector->eitr = adapter->eitr_param;
3574                 q_vector->v_idx = q_idx;
3575                 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3576                 adapter->q_vector[q_idx] = q_vector;
3577         }
3578
3579         return 0;
3580
3581 err_out:
3582         while (q_idx) {
3583                 q_idx--;
3584                 q_vector = adapter->q_vector[q_idx];
3585                 netif_napi_del(&q_vector->napi);
3586                 kfree(q_vector);
3587                 adapter->q_vector[q_idx] = NULL;
3588         }
3589         return -ENOMEM;
3590 }
3591
3592 /**
3593  * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3594  * @adapter: board private structure to initialize
3595  *
3596  * This function frees the memory allocated to the q_vectors.  In addition if
3597  * NAPI is enabled it will delete any references to the NAPI struct prior
3598  * to freeing the q_vector.
3599  **/
3600 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3601 {
3602         int q_idx, num_q_vectors;
3603
3604         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3605                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3606         else
3607                 num_q_vectors = 1;
3608
3609         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3610                 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3611                 adapter->q_vector[q_idx] = NULL;
3612                 netif_napi_del(&q_vector->napi);
3613                 kfree(q_vector);
3614         }
3615 }
3616
3617 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3618 {
3619         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3620                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3621                 pci_disable_msix(adapter->pdev);
3622                 kfree(adapter->msix_entries);
3623                 adapter->msix_entries = NULL;
3624         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3625                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3626                 pci_disable_msi(adapter->pdev);
3627         }
3628         return;
3629 }
3630
3631 /**
3632  * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3633  * @adapter: board private structure to initialize
3634  *
3635  * We determine which interrupt scheme to use based on...
3636  * - Kernel support (MSI, MSI-X)
3637  *   - which can be user-defined (via MODULE_PARAM)
3638  * - Hardware queue count (num_*_queues)
3639  *   - defined by miscellaneous hardware support/features (RSS, etc.)
3640  **/
3641 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3642 {
3643         int err;
3644
3645         /* Number of supported queues */
3646         ixgbe_set_num_queues(adapter);
3647
3648         err = ixgbe_set_interrupt_capability(adapter);
3649         if (err) {
3650                 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3651                 goto err_set_interrupt;
3652         }
3653
3654         err = ixgbe_alloc_q_vectors(adapter);
3655         if (err) {
3656                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3657                         "vectors\n");
3658                 goto err_alloc_q_vectors;
3659         }
3660
3661         err = ixgbe_alloc_queues(adapter);
3662         if (err) {
3663                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3664                 goto err_alloc_queues;
3665         }
3666
3667         DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3668                 "Tx Queue count = %u\n",
3669                 (adapter->num_rx_queues > 1) ? "Enabled" :
3670                 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3671
3672         set_bit(__IXGBE_DOWN, &adapter->state);
3673
3674         return 0;
3675
3676 err_alloc_queues:
3677         ixgbe_free_q_vectors(adapter);
3678 err_alloc_q_vectors:
3679         ixgbe_reset_interrupt_capability(adapter);
3680 err_set_interrupt:
3681         return err;
3682 }
3683
3684 /**
3685  * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3686  * @adapter: board private structure to clear interrupt scheme on
3687  *
3688  * We go through and clear interrupt specific resources and reset the structure
3689  * to pre-load conditions
3690  **/
3691 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3692 {
3693         kfree(adapter->tx_ring);
3694         kfree(adapter->rx_ring);
3695         adapter->tx_ring = NULL;
3696         adapter->rx_ring = NULL;
3697
3698         ixgbe_free_q_vectors(adapter);
3699         ixgbe_reset_interrupt_capability(adapter);
3700 }
3701
3702 /**
3703  * ixgbe_sfp_timer - worker thread to find a missing module
3704  * @data: pointer to our adapter struct
3705  **/
3706 static void ixgbe_sfp_timer(unsigned long data)
3707 {
3708         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3709
3710         /*
3711          * Do the sfp_timer outside of interrupt context due to the
3712          * delays that sfp+ detection requires
3713          */
3714         schedule_work(&adapter->sfp_task);
3715 }
3716
3717 /**
3718  * ixgbe_sfp_task - worker thread to find a missing module
3719  * @work: pointer to work_struct containing our data
3720  **/
3721 static void ixgbe_sfp_task(struct work_struct *work)
3722 {
3723         struct ixgbe_adapter *adapter = container_of(work,
3724                                                      struct ixgbe_adapter,
3725                                                      sfp_task);
3726         struct ixgbe_hw *hw = &adapter->hw;
3727
3728         if ((hw->phy.type == ixgbe_phy_nl) &&
3729             (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3730                 s32 ret = hw->phy.ops.identify_sfp(hw);
3731                 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3732                         goto reschedule;
3733                 ret = hw->phy.ops.reset(hw);
3734                 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3735                         dev_err(&adapter->pdev->dev, "failed to initialize "
3736                                 "because an unsupported SFP+ module type "
3737                                 "was detected.\n"
3738                                 "Reload the driver after installing a "
3739                                 "supported module.\n");
3740                         unregister_netdev(adapter->netdev);
3741                 } else {
3742                         DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3743                                 hw->phy.sfp_type);
3744                 }
3745                 /* don't need this routine any more */
3746                 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3747         }
3748         return;
3749 reschedule:
3750         if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3751                 mod_timer(&adapter->sfp_timer,
3752                           round_jiffies(jiffies + (2 * HZ)));
3753 }
3754
3755 /**
3756  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3757  * @adapter: board private structure to initialize
3758  *
3759  * ixgbe_sw_init initializes the Adapter private data structure.
3760  * Fields are initialized based on PCI device information and
3761  * OS network device settings (MTU size).
3762  **/
3763 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3764 {
3765         struct ixgbe_hw *hw = &adapter->hw;
3766         struct pci_dev *pdev = adapter->pdev;
3767         unsigned int rss;
3768 #ifdef CONFIG_IXGBE_DCB
3769         int j;
3770         struct tc_configuration *tc;
3771 #endif
3772
3773         /* PCI config space info */
3774
3775         hw->vendor_id = pdev->vendor;
3776         hw->device_id = pdev->device;
3777         hw->revision_id = pdev->revision;
3778         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3779         hw->subsystem_device_id = pdev->subsystem_device;
3780
3781         /* Set capability flags */
3782         rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3783         adapter->ring_feature[RING_F_RSS].indices = rss;
3784         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3785         adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3786         if (hw->mac.type == ixgbe_mac_82598EB) {
3787                 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3788                         adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3789                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3790         } else if (hw->mac.type == ixgbe_mac_82599EB) {
3791                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3792                 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3793                 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3794                 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3795                 adapter->ring_feature[RING_F_FDIR].indices =
3796                                                          IXGBE_MAX_FDIR_INDICES;
3797                 adapter->atr_sample_rate = 20;
3798                 adapter->fdir_pballoc = 0;
3799 #ifdef IXGBE_FCOE
3800                 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3801                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3802                 adapter->ring_feature[RING_F_FCOE].indices = 0;
3803                 /* Default traffic class to use for FCoE */
3804                 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
3805 #endif /* IXGBE_FCOE */
3806         }
3807
3808 #ifdef CONFIG_IXGBE_DCB
3809         /* Configure DCB traffic classes */
3810         for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3811                 tc = &adapter->dcb_cfg.tc_config[j];
3812                 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3813                 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3814                 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3815                 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3816                 tc->dcb_pfc = pfc_disabled;
3817         }
3818         adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3819         adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3820         adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3821         adapter->dcb_cfg.pfc_mode_enable = false;
3822         adapter->dcb_cfg.round_robin_enable = false;
3823         adapter->dcb_set_bitmap = 0x00;
3824         ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3825                            adapter->ring_feature[RING_F_DCB].indices);
3826
3827 #endif
3828
3829         /* default flow control settings */
3830         hw->fc.requested_mode = ixgbe_fc_full;
3831         hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
3832 #ifdef CONFIG_DCB
3833         adapter->last_lfc_mode = hw->fc.current_mode;
3834 #endif
3835         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3836         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3837         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3838         hw->fc.send_xon = true;
3839         hw->fc.disable_fc_autoneg = false;
3840
3841         /* enable itr by default in dynamic mode */
3842         adapter->itr_setting = 1;
3843         adapter->eitr_param = 20000;
3844
3845         /* set defaults for eitr in MegaBytes */
3846         adapter->eitr_low = 10;
3847         adapter->eitr_high = 20;
3848
3849         /* set default ring sizes */
3850         adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3851         adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3852
3853         /* initialize eeprom parameters */
3854         if (ixgbe_init_eeprom_params_generic(hw)) {
3855                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3856                 return -EIO;
3857         }
3858
3859         /* enable rx csum by default */
3860         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3861
3862         set_bit(__IXGBE_DOWN, &adapter->state);
3863
3864         return 0;
3865 }
3866
3867 /**
3868  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3869  * @adapter: board private structure
3870  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
3871  *
3872  * Return 0 on success, negative on failure
3873  **/
3874 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3875                              struct ixgbe_ring *tx_ring)
3876 {
3877         struct pci_dev *pdev = adapter->pdev;
3878         int size;
3879
3880         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3881         tx_ring->tx_buffer_info = vmalloc(size);
3882         if (!tx_ring->tx_buffer_info)
3883                 goto err;
3884         memset(tx_ring->tx_buffer_info, 0, size);
3885
3886         /* round up to nearest 4K */
3887         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3888         tx_ring->size = ALIGN(tx_ring->size, 4096);
3889
3890         tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3891                                              &tx_ring->dma);
3892         if (!tx_ring->desc)
3893                 goto err;
3894
3895         tx_ring->next_to_use = 0;
3896         tx_ring->next_to_clean = 0;
3897         tx_ring->work_limit = tx_ring->count;
3898         return 0;
3899
3900 err:
3901         vfree(tx_ring->tx_buffer_info);
3902         tx_ring->tx_buffer_info = NULL;
3903         DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3904                             "descriptor ring\n");
3905         return -ENOMEM;
3906 }
3907
3908 /**
3909  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3910  * @adapter: board private structure
3911  *
3912  * If this function returns with an error, then it's possible one or
3913  * more of the rings is populated (while the rest are not).  It is the
3914  * callers duty to clean those orphaned rings.
3915  *
3916  * Return 0 on success, negative on failure
3917  **/
3918 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3919 {
3920         int i, err = 0;
3921
3922         for (i = 0; i < adapter->num_tx_queues; i++) {
3923                 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3924                 if (!err)
3925                         continue;
3926                 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3927                 break;
3928         }
3929
3930         return err;
3931 }
3932
3933 /**
3934  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3935  * @adapter: board private structure
3936  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
3937  *
3938  * Returns 0 on success, negative on failure
3939  **/
3940 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
3941                              struct ixgbe_ring *rx_ring)
3942 {
3943         struct pci_dev *pdev = adapter->pdev;
3944         int size;
3945
3946         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3947         rx_ring->rx_buffer_info = vmalloc(size);
3948         if (!rx_ring->rx_buffer_info) {
3949                 DPRINTK(PROBE, ERR,
3950                         "vmalloc allocation failed for the rx desc ring\n");
3951                 goto alloc_failed;
3952         }
3953         memset(rx_ring->rx_buffer_info, 0, size);
3954
3955         /* Round up to nearest 4K */
3956         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3957         rx_ring->size = ALIGN(rx_ring->size, 4096);
3958
3959         rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
3960
3961         if (!rx_ring->desc) {
3962                 DPRINTK(PROBE, ERR,
3963                         "Memory allocation failed for the rx desc ring\n");
3964                 vfree(rx_ring->rx_buffer_info);
3965                 goto alloc_failed;
3966         }
3967
3968         rx_ring->next_to_clean = 0;
3969         rx_ring->next_to_use = 0;
3970
3971         return 0;
3972
3973 alloc_failed:
3974         return -ENOMEM;
3975 }
3976
3977 /**
3978  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
3979  * @adapter: board private structure
3980  *
3981  * If this function returns with an error, then it's possible one or
3982  * more of the rings is populated (while the rest are not).  It is the
3983  * callers duty to clean those orphaned rings.
3984  *
3985  * Return 0 on success, negative on failure
3986  **/
3987
3988 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
3989 {
3990         int i, err = 0;
3991
3992         for (i = 0; i < adapter->num_rx_queues; i++) {
3993                 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
3994                 if (!err)
3995                         continue;
3996                 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
3997                 break;
3998         }
3999
4000         return err;
4001 }
4002
4003 /**
4004  * ixgbe_free_tx_resources - Free Tx Resources per Queue
4005  * @adapter: board private structure
4006  * @tx_ring: Tx descriptor ring for a specific queue
4007  *
4008  * Free all transmit software resources
4009  **/
4010 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4011                              struct ixgbe_ring *tx_ring)
4012 {
4013         struct pci_dev *pdev = adapter->pdev;
4014
4015         ixgbe_clean_tx_ring(adapter, tx_ring);
4016
4017         vfree(tx_ring->tx_buffer_info);
4018         tx_ring->tx_buffer_info = NULL;
4019
4020         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4021
4022         tx_ring->desc = NULL;
4023 }
4024
4025 /**
4026  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4027  * @adapter: board private structure
4028  *
4029  * Free all transmit software resources
4030  **/
4031 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4032 {
4033         int i;
4034
4035         for (i = 0; i < adapter->num_tx_queues; i++)
4036                 if (adapter->tx_ring[i].desc)
4037                         ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4038 }
4039
4040 /**
4041  * ixgbe_free_rx_resources - Free Rx Resources
4042  * @adapter: board private structure
4043  * @rx_ring: ring to clean the resources from
4044  *
4045  * Free all receive software resources
4046  **/
4047 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4048                              struct ixgbe_ring *rx_ring)
4049 {
4050         struct pci_dev *pdev = adapter->pdev;
4051
4052         ixgbe_clean_rx_ring(adapter, rx_ring);
4053
4054         vfree(rx_ring->rx_buffer_info);
4055         rx_ring->rx_buffer_info = NULL;
4056
4057         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4058
4059         rx_ring->desc = NULL;
4060 }
4061
4062 /**
4063  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4064  * @adapter: board private structure
4065  *
4066  * Free all receive software resources
4067  **/
4068 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4069 {
4070         int i;
4071
4072         for (i = 0; i < adapter->num_rx_queues; i++)
4073                 if (adapter->rx_ring[i].desc)
4074                         ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4075 }
4076
4077 /**
4078  * ixgbe_change_mtu - Change the Maximum Transfer Unit
4079  * @netdev: network interface device structure
4080  * @new_mtu: new value for maximum frame size
4081  *
4082  * Returns 0 on success, negative on failure
4083  **/
4084 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4085 {
4086         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4087         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4088
4089         /* MTU < 68 is an error and causes problems on some kernels */
4090         if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4091                 return -EINVAL;
4092
4093         DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4094                 netdev->mtu, new_mtu);
4095         /* must set new MTU before calling down or up */
4096         netdev->mtu = new_mtu;
4097
4098         if (netif_running(netdev))
4099                 ixgbe_reinit_locked(adapter);
4100
4101         return 0;
4102 }
4103
4104 /**
4105  * ixgbe_open - Called when a network interface is made active
4106  * @netdev: network interface device structure
4107  *
4108  * Returns 0 on success, negative value on failure
4109  *
4110  * The open entry point is called when a network interface is made
4111  * active by the system (IFF_UP).  At this point all resources needed
4112  * for transmit and receive operations are allocated, the interrupt
4113  * handler is registered with the OS, the watchdog timer is started,
4114  * and the stack is notified that the interface is ready.
4115  **/
4116 static int ixgbe_open(struct net_device *netdev)
4117 {
4118         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4119         int err;
4120
4121         /* disallow open during test */
4122         if (test_bit(__IXGBE_TESTING, &adapter->state))
4123                 return -EBUSY;
4124
4125         netif_carrier_off(netdev);
4126
4127         /* allocate transmit descriptors */
4128         err = ixgbe_setup_all_tx_resources(adapter);
4129         if (err)
4130                 goto err_setup_tx;
4131
4132         /* allocate receive descriptors */
4133         err = ixgbe_setup_all_rx_resources(adapter);
4134         if (err)
4135                 goto err_setup_rx;
4136
4137         ixgbe_configure(adapter);
4138
4139         err = ixgbe_request_irq(adapter);
4140         if (err)
4141                 goto err_req_irq;
4142
4143         err = ixgbe_up_complete(adapter);
4144         if (err)
4145                 goto err_up;
4146
4147         netif_tx_start_all_queues(netdev);
4148
4149         return 0;
4150
4151 err_up:
4152         ixgbe_release_hw_control(adapter);
4153         ixgbe_free_irq(adapter);
4154 err_req_irq:
4155 err_setup_rx:
4156         ixgbe_free_all_rx_resources(adapter);
4157 err_setup_tx:
4158         ixgbe_free_all_tx_resources(adapter);
4159         ixgbe_reset(adapter);
4160
4161         return err;
4162 }
4163
4164 /**
4165  * ixgbe_close - Disables a network interface
4166  * @netdev: network interface device structure
4167  *
4168  * Returns 0, this is not allowed to fail
4169  *
4170  * The close entry point is called when an interface is de-activated
4171  * by the OS.  The hardware is still under the drivers control, but
4172  * needs to be disabled.  A global MAC reset is issued to stop the
4173  * hardware, and all transmit and receive resources are freed.
4174  **/
4175 static int ixgbe_close(struct net_device *netdev)
4176 {
4177         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4178
4179         ixgbe_down(adapter);
4180         ixgbe_free_irq(adapter);
4181
4182         ixgbe_free_all_tx_resources(adapter);
4183         ixgbe_free_all_rx_resources(adapter);
4184
4185         ixgbe_release_hw_control(adapter);
4186
4187         return 0;
4188 }
4189
4190 #ifdef CONFIG_PM
4191 static int ixgbe_resume(struct pci_dev *pdev)
4192 {
4193         struct net_device *netdev = pci_get_drvdata(pdev);
4194         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4195         u32 err;
4196
4197         pci_set_power_state(pdev, PCI_D0);
4198         pci_restore_state(pdev);
4199
4200         err = pci_enable_device_mem(pdev);
4201         if (err) {
4202                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4203                                 "suspend\n");
4204                 return err;
4205         }
4206         pci_set_master(pdev);
4207
4208         pci_wake_from_d3(pdev, false);
4209
4210         err = ixgbe_init_interrupt_scheme(adapter);
4211         if (err) {
4212                 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4213                                 "device\n");
4214                 return err;
4215         }
4216
4217         ixgbe_reset(adapter);
4218
4219         IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4220
4221         if (netif_running(netdev)) {
4222                 err = ixgbe_open(adapter->netdev);
4223                 if (err)
4224                         return err;
4225         }
4226
4227         netif_device_attach(netdev);
4228
4229         return 0;
4230 }
4231 #endif /* CONFIG_PM */
4232
4233 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4234 {
4235         struct net_device *netdev = pci_get_drvdata(pdev);
4236         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4237         struct ixgbe_hw *hw = &adapter->hw;
4238         u32 ctrl, fctrl;
4239         u32 wufc = adapter->wol;
4240 #ifdef CONFIG_PM
4241         int retval = 0;
4242 #endif
4243
4244         netif_device_detach(netdev);
4245
4246         if (netif_running(netdev)) {
4247                 ixgbe_down(adapter);
4248                 ixgbe_free_irq(adapter);
4249                 ixgbe_free_all_tx_resources(adapter);
4250                 ixgbe_free_all_rx_resources(adapter);
4251         }
4252         ixgbe_clear_interrupt_scheme(adapter);
4253
4254 #ifdef CONFIG_PM
4255         retval = pci_save_state(pdev);
4256         if (retval)
4257                 return retval;
4258
4259 #endif
4260         if (wufc) {
4261                 ixgbe_set_rx_mode(netdev);
4262
4263                 /* turn on all-multi mode if wake on multicast is enabled */
4264                 if (wufc & IXGBE_WUFC_MC) {
4265                         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4266                         fctrl |= IXGBE_FCTRL_MPE;
4267                         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4268                 }
4269
4270                 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4271                 ctrl |= IXGBE_CTRL_GIO_DIS;
4272                 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4273
4274                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4275         } else {
4276                 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4277                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4278         }
4279
4280         if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4281                 pci_wake_from_d3(pdev, true);
4282         else
4283                 pci_wake_from_d3(pdev, false);
4284
4285         *enable_wake = !!wufc;
4286
4287         ixgbe_release_hw_control(adapter);
4288
4289         pci_disable_device(pdev);
4290
4291         return 0;
4292 }
4293
4294 #ifdef CONFIG_PM
4295 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4296 {
4297         int retval;
4298         bool wake;
4299
4300         retval = __ixgbe_shutdown(pdev, &wake);
4301         if (retval)
4302                 return retval;
4303
4304         if (wake) {
4305                 pci_prepare_to_sleep(pdev);
4306         } else {
4307                 pci_wake_from_d3(pdev, false);
4308                 pci_set_power_state(pdev, PCI_D3hot);
4309         }
4310
4311         return 0;
4312 }
4313 #endif /* CONFIG_PM */
4314
4315 static void ixgbe_shutdown(struct pci_dev *pdev)
4316 {
4317         bool wake;
4318
4319         __ixgbe_shutdown(pdev, &wake);
4320
4321         if (system_state == SYSTEM_POWER_OFF) {
4322                 pci_wake_from_d3(pdev, wake);
4323                 pci_set_power_state(pdev, PCI_D3hot);
4324         }
4325 }
4326
4327 /**
4328  * ixgbe_update_stats - Update the board statistics counters.
4329  * @adapter: board private structure
4330  **/
4331 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4332 {
4333         struct ixgbe_hw *hw = &adapter->hw;
4334         u64 total_mpc = 0;
4335         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4336
4337         if (hw->mac.type == ixgbe_mac_82599EB) {
4338                 u64 rsc_count = 0;
4339                 for (i = 0; i < 16; i++)
4340                         adapter->hw_rx_no_dma_resources +=
4341                                              IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4342                 for (i = 0; i < adapter->num_rx_queues; i++)
4343                         rsc_count += adapter->rx_ring[i].rsc_count;
4344                 adapter->rsc_count = rsc_count;
4345         }
4346
4347         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4348         for (i = 0; i < 8; i++) {
4349                 /* for packet buffers not used, the register should read 0 */
4350                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4351                 missed_rx += mpc;
4352                 adapter->stats.mpc[i] += mpc;
4353                 total_mpc += adapter->stats.mpc[i];
4354                 if (hw->mac.type == ixgbe_mac_82598EB)
4355                         adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4356                 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4357                 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4358                 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4359                 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4360                 if (hw->mac.type == ixgbe_mac_82599EB) {
4361                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4362                                                             IXGBE_PXONRXCNT(i));
4363                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4364                                                            IXGBE_PXOFFRXCNT(i));
4365                         adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4366                 } else {
4367                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4368                                                               IXGBE_PXONRXC(i));
4369                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4370                                                              IXGBE_PXOFFRXC(i));
4371                 }
4372                 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4373                                                             IXGBE_PXONTXC(i));
4374                 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4375                                                              IXGBE_PXOFFTXC(i));
4376         }
4377         adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4378         /* work around hardware counting issue */
4379         adapter->stats.gprc -= missed_rx;
4380
4381         /* 82598 hardware only has a 32 bit counter in the high register */
4382         if (hw->mac.type == ixgbe_mac_82599EB) {
4383                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4384                 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
4385                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4386                 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
4387                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4388                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4389                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4390                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4391                 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4392                 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4393 #ifdef IXGBE_FCOE
4394                 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4395                 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4396                 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4397                 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4398                 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4399                 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4400 #endif /* IXGBE_FCOE */
4401         } else {
4402                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4403                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4404                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4405                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4406                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4407         }
4408         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4409         adapter->stats.bprc += bprc;
4410         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4411         if (hw->mac.type == ixgbe_mac_82598EB)
4412                 adapter->stats.mprc -= bprc;
4413         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4414         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4415         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4416         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4417         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4418         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4419         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4420         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4421         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4422         adapter->stats.lxontxc += lxon;
4423         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4424         adapter->stats.lxofftxc += lxoff;
4425         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4426         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4427         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4428         /*
4429          * 82598 errata - tx of flow control packets is included in tx counters
4430          */
4431         xon_off_tot = lxon + lxoff;
4432         adapter->stats.gptc -= xon_off_tot;
4433         adapter->stats.mptc -= xon_off_tot;
4434         adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4435         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4436         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4437         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4438         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4439         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4440         adapter->stats.ptc64 -= xon_off_tot;
4441         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4442         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4443         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4444         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4445         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4446         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4447
4448         /* Fill out the OS statistics structure */
4449         adapter->net_stats.multicast = adapter->stats.mprc;
4450
4451         /* Rx Errors */
4452         adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4453                                        adapter->stats.rlec;
4454         adapter->net_stats.rx_dropped = 0;
4455         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4456         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4457         adapter->net_stats.rx_missed_errors = total_mpc;
4458 }
4459
4460 /**
4461  * ixgbe_watchdog - Timer Call-back
4462  * @data: pointer to adapter cast into an unsigned long
4463  **/
4464 static void ixgbe_watchdog(unsigned long data)
4465 {
4466         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4467         struct ixgbe_hw *hw = &adapter->hw;
4468         u64 eics = 0;
4469         int i;
4470
4471         /*
4472          *  Do the watchdog outside of interrupt context due to the lovely
4473          * delays that some of the newer hardware requires
4474          */
4475
4476         if (test_bit(__IXGBE_DOWN, &adapter->state))
4477                 goto watchdog_short_circuit;
4478
4479         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4480                 /*
4481                  * for legacy and MSI interrupts don't set any bits
4482                  * that are enabled for EIAM, because this operation
4483                  * would set *both* EIMS and EICS for any bit in EIAM
4484                  */
4485                 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4486                         (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4487                 goto watchdog_reschedule;
4488         }
4489
4490         /* get one bit for every active tx/rx interrupt vector */
4491         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4492                 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4493                 if (qv->rxr_count || qv->txr_count)
4494                         eics |= ((u64)1 << i);
4495         }
4496
4497         /* Cause software interrupt to ensure rx rings are cleaned */
4498         ixgbe_irq_rearm_queues(adapter, eics);
4499
4500 watchdog_reschedule:
4501         /* Reset the timer */
4502         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4503
4504 watchdog_short_circuit:
4505         schedule_work(&adapter->watchdog_task);
4506 }
4507
4508 /**
4509  * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4510  * @work: pointer to work_struct containing our data
4511  **/
4512 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4513 {
4514         struct ixgbe_adapter *adapter = container_of(work,
4515                                                      struct ixgbe_adapter,
4516                                                      multispeed_fiber_task);
4517         struct ixgbe_hw *hw = &adapter->hw;
4518         u32 autoneg;
4519         bool negotiation;
4520
4521         adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4522         autoneg = hw->phy.autoneg_advertised;
4523         if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4524                 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4525         if (hw->mac.ops.setup_link)
4526                 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4527         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4528         adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4529 }
4530
4531 /**
4532  * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4533  * @work: pointer to work_struct containing our data
4534  **/
4535 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4536 {
4537         struct ixgbe_adapter *adapter = container_of(work,
4538                                                      struct ixgbe_adapter,
4539                                                      sfp_config_module_task);
4540         struct ixgbe_hw *hw = &adapter->hw;
4541         u32 err;
4542
4543         adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4544
4545         /* Time for electrical oscillations to settle down */
4546         msleep(100);
4547         err = hw->phy.ops.identify_sfp(hw);
4548
4549         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4550                 dev_err(&adapter->pdev->dev, "failed to initialize because "
4551                         "an unsupported SFP+ module type was detected.\n"
4552                         "Reload the driver after installing a supported "
4553                         "module.\n");
4554                 unregister_netdev(adapter->netdev);
4555                 return;
4556         }
4557         hw->mac.ops.setup_sfp(hw);
4558
4559         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4560                 /* This will also work for DA Twinax connections */
4561                 schedule_work(&adapter->multispeed_fiber_task);
4562         adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4563 }
4564
4565 /**
4566  * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4567  * @work: pointer to work_struct containing our data
4568  **/
4569 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4570 {
4571         struct ixgbe_adapter *adapter = container_of(work,
4572                                                      struct ixgbe_adapter,
4573                                                      fdir_reinit_task);
4574         struct ixgbe_hw *hw = &adapter->hw;
4575         int i;
4576
4577         if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4578                 for (i = 0; i < adapter->num_tx_queues; i++)
4579                         set_bit(__IXGBE_FDIR_INIT_DONE,
4580                                 &(adapter->tx_ring[i].reinit_state));
4581         } else {
4582                 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4583                         "ignored adding FDIR ATR filters \n");
4584         }
4585         /* Done FDIR Re-initialization, enable transmits */
4586         netif_tx_start_all_queues(adapter->netdev);
4587 }
4588
4589 /**
4590  * ixgbe_watchdog_task - worker thread to bring link up
4591  * @work: pointer to work_struct containing our data
4592  **/
4593 static void ixgbe_watchdog_task(struct work_struct *work)
4594 {
4595         struct ixgbe_adapter *adapter = container_of(work,
4596                                                      struct ixgbe_adapter,
4597                                                      watchdog_task);
4598         struct net_device *netdev = adapter->netdev;
4599         struct ixgbe_hw *hw = &adapter->hw;
4600         u32 link_speed = adapter->link_speed;
4601         bool link_up = adapter->link_up;
4602         int i;
4603         struct ixgbe_ring *tx_ring;
4604         int some_tx_pending = 0;
4605
4606         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4607
4608         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4609                 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4610                 if (link_up) {
4611 #ifdef CONFIG_DCB
4612                         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4613                                 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4614                                         hw->mac.ops.fc_enable(hw, i);
4615                         } else {
4616                                 hw->mac.ops.fc_enable(hw, 0);
4617                         }
4618 #else
4619                         hw->mac.ops.fc_enable(hw, 0);
4620 #endif
4621                 }
4622
4623                 if (link_up ||
4624                     time_after(jiffies, (adapter->link_check_timeout +
4625                                          IXGBE_TRY_LINK_TIMEOUT))) {
4626                         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4627                         IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4628                 }
4629                 adapter->link_up = link_up;
4630                 adapter->link_speed = link_speed;
4631         }
4632
4633         if (link_up) {
4634                 if (!netif_carrier_ok(netdev)) {
4635                         bool flow_rx, flow_tx;
4636
4637                         if (hw->mac.type == ixgbe_mac_82599EB) {
4638                                 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4639                                 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4640                                 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4641                                 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4642                         } else {
4643                                 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4644                                 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4645                                 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4646                                 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4647                         }
4648
4649                         printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4650                                "Flow Control: %s\n",
4651                                netdev->name,
4652                                (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4653                                 "10 Gbps" :
4654                                 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4655                                  "1 Gbps" : "unknown speed")),
4656                                ((flow_rx && flow_tx) ? "RX/TX" :
4657                                 (flow_rx ? "RX" :
4658                                 (flow_tx ? "TX" : "None"))));
4659
4660                         netif_carrier_on(netdev);
4661                 } else {
4662                         /* Force detection of hung controller */
4663                         adapter->detect_tx_hung = true;
4664                 }
4665         } else {
4666                 adapter->link_up = false;
4667                 adapter->link_speed = 0;
4668                 if (netif_carrier_ok(netdev)) {
4669                         printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4670                                netdev->name);
4671                         netif_carrier_off(netdev);
4672                 }
4673         }
4674
4675         if (!netif_carrier_ok(netdev)) {
4676                 for (i = 0; i < adapter->num_tx_queues; i++) {
4677                         tx_ring = &adapter->tx_ring[i];
4678                         if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4679                                 some_tx_pending = 1;
4680                                 break;
4681                         }
4682                 }
4683
4684                 if (some_tx_pending) {
4685                         /* We've lost link, so the controller stops DMA,
4686                          * but we've got queued Tx work that's never going
4687                          * to get done, so reset controller to flush Tx.
4688                          * (Do the reset outside of interrupt context).
4689                          */
4690                          schedule_work(&adapter->reset_task);
4691                 }
4692         }
4693
4694         ixgbe_update_stats(adapter);
4695         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4696 }
4697
4698 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4699                      struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4700                      u32 tx_flags, u8 *hdr_len)
4701 {
4702         struct ixgbe_adv_tx_context_desc *context_desc;
4703         unsigned int i;
4704         int err;
4705         struct ixgbe_tx_buffer *tx_buffer_info;
4706         u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4707         u32 mss_l4len_idx, l4len;
4708
4709         if (skb_is_gso(skb)) {
4710                 if (skb_header_cloned(skb)) {
4711                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4712                         if (err)
4713                                 return err;
4714                 }
4715                 l4len = tcp_hdrlen(skb);
4716                 *hdr_len += l4len;
4717
4718                 if (skb->protocol == htons(ETH_P_IP)) {
4719                         struct iphdr *iph = ip_hdr(skb);
4720                         iph->tot_len = 0;
4721                         iph->check = 0;
4722                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4723                                                                  iph->daddr, 0,
4724                                                                  IPPROTO_TCP,
4725                                                                  0);
4726                         adapter->hw_tso_ctxt++;
4727                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4728                         ipv6_hdr(skb)->payload_len = 0;
4729                         tcp_hdr(skb)->check =
4730                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4731                                              &ipv6_hdr(skb)->daddr,
4732                                              0, IPPROTO_TCP, 0);
4733                         adapter->hw_tso6_ctxt++;
4734                 }
4735
4736                 i = tx_ring->next_to_use;
4737
4738                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4739                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4740
4741                 /* VLAN MACLEN IPLEN */
4742                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4743                         vlan_macip_lens |=
4744                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4745                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4746                                     IXGBE_ADVTXD_MACLEN_SHIFT);
4747                 *hdr_len += skb_network_offset(skb);
4748                 vlan_macip_lens |=
4749                     (skb_transport_header(skb) - skb_network_header(skb));
4750                 *hdr_len +=
4751                     (skb_transport_header(skb) - skb_network_header(skb));
4752                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4753                 context_desc->seqnum_seed = 0;
4754
4755                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4756                 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4757                                    IXGBE_ADVTXD_DTYP_CTXT);
4758
4759                 if (skb->protocol == htons(ETH_P_IP))
4760                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4761                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4762                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4763
4764                 /* MSS L4LEN IDX */
4765                 mss_l4len_idx =
4766                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4767                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4768                 /* use index 1 for TSO */
4769                 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4770                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4771
4772                 tx_buffer_info->time_stamp = jiffies;
4773                 tx_buffer_info->next_to_watch = i;
4774
4775                 i++;
4776                 if (i == tx_ring->count)
4777                         i = 0;
4778                 tx_ring->next_to_use = i;
4779
4780                 return true;
4781         }
4782         return false;
4783 }
4784
4785 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4786                           struct ixgbe_ring *tx_ring,
4787                           struct sk_buff *skb, u32 tx_flags)
4788 {
4789         struct ixgbe_adv_tx_context_desc *context_desc;
4790         unsigned int i;
4791         struct ixgbe_tx_buffer *tx_buffer_info;
4792         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4793
4794         if (skb->ip_summed == CHECKSUM_PARTIAL ||
4795             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4796                 i = tx_ring->next_to_use;
4797                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4798                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4799
4800                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4801                         vlan_macip_lens |=
4802                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4803                 vlan_macip_lens |= (skb_network_offset(skb) <<
4804                                     IXGBE_ADVTXD_MACLEN_SHIFT);
4805                 if (skb->ip_summed == CHECKSUM_PARTIAL)
4806                         vlan_macip_lens |= (skb_transport_header(skb) -
4807                                             skb_network_header(skb));
4808
4809                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4810                 context_desc->seqnum_seed = 0;
4811
4812                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4813                                     IXGBE_ADVTXD_DTYP_CTXT);
4814
4815                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4816                         switch (skb->protocol) {
4817                         case cpu_to_be16(ETH_P_IP):
4818                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4819                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4820                                         type_tucmd_mlhl |=
4821                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4822                                 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4823                                         type_tucmd_mlhl |=
4824                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4825                                 break;
4826                         case cpu_to_be16(ETH_P_IPV6):
4827                                 /* XXX what about other V6 headers?? */
4828                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4829                                         type_tucmd_mlhl |=
4830                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4831                                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4832                                         type_tucmd_mlhl |=
4833                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4834                                 break;
4835                         default:
4836                                 if (unlikely(net_ratelimit())) {
4837                                         DPRINTK(PROBE, WARNING,
4838                                          "partial checksum but proto=%x!\n",
4839                                          skb->protocol);
4840                                 }
4841                                 break;
4842                         }
4843                 }
4844
4845                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4846                 /* use index zero for tx checksum offload */
4847                 context_desc->mss_l4len_idx = 0;
4848
4849                 tx_buffer_info->time_stamp = jiffies;
4850                 tx_buffer_info->next_to_watch = i;
4851
4852                 adapter->hw_csum_tx_good++;
4853                 i++;
4854                 if (i == tx_ring->count)
4855                         i = 0;
4856                 tx_ring->next_to_use = i;
4857
4858                 return true;
4859         }
4860
4861         return false;
4862 }
4863
4864 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4865                         struct ixgbe_ring *tx_ring,
4866                         struct sk_buff *skb, u32 tx_flags,
4867                         unsigned int first)
4868 {
4869         struct ixgbe_tx_buffer *tx_buffer_info;
4870         unsigned int len;
4871         unsigned int total = skb->len;
4872         unsigned int offset = 0, size, count = 0, i;
4873         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4874         unsigned int f;
4875         dma_addr_t *map;
4876
4877         i = tx_ring->next_to_use;
4878
4879         if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4880                 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4881                 return 0;
4882         }
4883
4884         map = skb_shinfo(skb)->dma_maps;
4885
4886         if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4887                 /* excluding fcoe_crc_eof for FCoE */
4888                 total -= sizeof(struct fcoe_crc_eof);
4889
4890         len = min(skb_headlen(skb), total);
4891         while (len) {
4892                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4893                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4894
4895                 tx_buffer_info->length = size;
4896                 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
4897                 tx_buffer_info->time_stamp = jiffies;
4898                 tx_buffer_info->next_to_watch = i;
4899
4900                 len -= size;
4901                 total -= size;
4902                 offset += size;
4903                 count++;
4904
4905                 if (len) {
4906                         i++;
4907                         if (i == tx_ring->count)
4908                                 i = 0;
4909                 }
4910         }
4911
4912         for (f = 0; f < nr_frags; f++) {
4913                 struct skb_frag_struct *frag;
4914
4915                 frag = &skb_shinfo(skb)->frags[f];
4916                 len = min((unsigned int)frag->size, total);
4917                 offset = 0;
4918
4919                 while (len) {
4920                         i++;
4921                         if (i == tx_ring->count)
4922                                 i = 0;
4923
4924                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
4925                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4926
4927                         tx_buffer_info->length = size;
4928                         tx_buffer_info->dma = map[f] + offset;
4929                         tx_buffer_info->time_stamp = jiffies;
4930                         tx_buffer_info->next_to_watch = i;
4931
4932                         len -= size;
4933                         total -= size;
4934                         offset += size;
4935                         count++;
4936                 }
4937                 if (total == 0)
4938                         break;
4939         }
4940
4941         tx_ring->tx_buffer_info[i].skb = skb;
4942         tx_ring->tx_buffer_info[first].next_to_watch = i;
4943
4944         return count;
4945 }
4946
4947 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
4948                            struct ixgbe_ring *tx_ring,
4949                            int tx_flags, int count, u32 paylen, u8 hdr_len)
4950 {
4951         union ixgbe_adv_tx_desc *tx_desc = NULL;
4952         struct ixgbe_tx_buffer *tx_buffer_info;
4953         u32 olinfo_status = 0, cmd_type_len = 0;
4954         unsigned int i;
4955         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
4956
4957         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
4958
4959         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
4960
4961         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4962                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
4963
4964         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
4965                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4966
4967                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4968                                  IXGBE_ADVTXD_POPTS_SHIFT;
4969
4970                 /* use index 1 context for tso */
4971                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4972                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
4973                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
4974                                          IXGBE_ADVTXD_POPTS_SHIFT;
4975
4976         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
4977                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4978                                  IXGBE_ADVTXD_POPTS_SHIFT;
4979
4980         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4981                 olinfo_status |= IXGBE_ADVTXD_CC;
4982                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4983                 if (tx_flags & IXGBE_TX_FLAGS_FSO)
4984                         cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4985         }
4986
4987         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
4988
4989         i = tx_ring->next_to_use;
4990         while (count--) {
4991                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4992                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
4993                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
4994                 tx_desc->read.cmd_type_len =
4995                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
4996                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
4997                 i++;
4998                 if (i == tx_ring->count)
4999                         i = 0;
5000         }
5001
5002         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5003
5004         /*
5005          * Force memory writes to complete before letting h/w
5006          * know there are new descriptors to fetch.  (Only
5007          * applicable for weak-ordered memory model archs,
5008          * such as IA-64).
5009          */
5010         wmb();
5011
5012         tx_ring->next_to_use = i;
5013         writel(i, adapter->hw.hw_addr + tx_ring->tail);
5014 }
5015
5016 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5017                       int queue, u32 tx_flags)
5018 {
5019         /* Right now, we support IPv4 only */
5020         struct ixgbe_atr_input atr_input;
5021         struct tcphdr *th;
5022         struct udphdr *uh;
5023         struct iphdr *iph = ip_hdr(skb);
5024         struct ethhdr *eth = (struct ethhdr *)skb->data;
5025         u16 vlan_id, src_port, dst_port, flex_bytes;
5026         u32 src_ipv4_addr, dst_ipv4_addr;
5027         u8 l4type = 0;
5028
5029         /* check if we're UDP or TCP */
5030         if (iph->protocol == IPPROTO_TCP) {
5031                 th = tcp_hdr(skb);
5032                 src_port = th->source;
5033                 dst_port = th->dest;
5034                 l4type |= IXGBE_ATR_L4TYPE_TCP;
5035                 /* l4type IPv4 type is 0, no need to assign */
5036         } else if(iph->protocol == IPPROTO_UDP) {
5037                 uh = udp_hdr(skb);
5038                 src_port = uh->source;
5039                 dst_port = uh->dest;
5040                 l4type |= IXGBE_ATR_L4TYPE_UDP;
5041                 /* l4type IPv4 type is 0, no need to assign */
5042         } else {
5043                 /* Unsupported L4 header, just bail here */
5044                 return;
5045         }
5046
5047         memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5048
5049         vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5050                    IXGBE_TX_FLAGS_VLAN_SHIFT;
5051         src_ipv4_addr = iph->saddr;
5052         dst_ipv4_addr = iph->daddr;
5053         flex_bytes = eth->h_proto;
5054
5055         ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5056         ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5057         ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5058         ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5059         ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5060         /* src and dst are inverted, think how the receiver sees them */
5061         ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5062         ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5063
5064         /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5065         ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5066 }
5067
5068 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5069                                  struct ixgbe_ring *tx_ring, int size)
5070 {
5071         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5072
5073         netif_stop_subqueue(netdev, tx_ring->queue_index);
5074         /* Herbert's original patch had:
5075          *  smp_mb__after_netif_stop_queue();
5076          * but since that doesn't exist yet, just open code it. */
5077         smp_mb();
5078
5079         /* We need to check again in a case another CPU has just
5080          * made room available. */
5081         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5082                 return -EBUSY;
5083
5084         /* A reprieve! - use start_queue because it doesn't call schedule */
5085         netif_start_subqueue(netdev, tx_ring->queue_index);
5086         ++adapter->restart_queue;
5087         return 0;
5088 }
5089
5090 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5091                               struct ixgbe_ring *tx_ring, int size)
5092 {
5093         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5094                 return 0;
5095         return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5096 }
5097
5098 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5099 {
5100         struct ixgbe_adapter *adapter = netdev_priv(dev);
5101
5102         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5103                 return smp_processor_id();
5104
5105         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5106                 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5107
5108         return skb_tx_hash(dev, skb);
5109 }
5110
5111 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5112                                     struct net_device *netdev)
5113 {
5114         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5115         struct ixgbe_ring *tx_ring;
5116         unsigned int first;
5117         unsigned int tx_flags = 0;
5118         u8 hdr_len = 0;
5119         int r_idx = 0, tso;
5120         int count = 0;
5121         unsigned int f;
5122
5123         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5124                 tx_flags |= vlan_tx_tag_get(skb);
5125                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5126                         tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5127                         tx_flags |= (skb->queue_mapping << 13);
5128                 }
5129                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5130                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5131         } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5132                 if (skb->priority != TC_PRIO_CONTROL) {
5133                         tx_flags |= (skb->queue_mapping << 13);
5134                         tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5135                         tx_flags |= IXGBE_TX_FLAGS_VLAN;
5136                 } else {
5137                         skb->queue_mapping =
5138                                 adapter->ring_feature[RING_F_DCB].indices-1;
5139                 }
5140         }
5141
5142         r_idx = skb->queue_mapping;
5143         tx_ring = &adapter->tx_ring[r_idx];
5144
5145         if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5146             (skb->protocol == htons(ETH_P_FCOE)))
5147                 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5148
5149         /* four things can cause us to need a context descriptor */
5150         if (skb_is_gso(skb) ||
5151             (skb->ip_summed == CHECKSUM_PARTIAL) ||
5152             (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5153             (tx_flags & IXGBE_TX_FLAGS_FCOE))
5154                 count++;
5155
5156         count += TXD_USE_COUNT(skb_headlen(skb));
5157         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5158                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5159
5160         if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5161                 adapter->tx_busy++;
5162                 return NETDEV_TX_BUSY;
5163         }
5164
5165         first = tx_ring->next_to_use;
5166         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5167 #ifdef IXGBE_FCOE
5168                 /* setup tx offload for FCoE */
5169                 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5170                 if (tso < 0) {
5171                         dev_kfree_skb_any(skb);
5172                         return NETDEV_TX_OK;
5173                 }
5174                 if (tso)
5175                         tx_flags |= IXGBE_TX_FLAGS_FSO;
5176 #endif /* IXGBE_FCOE */
5177         } else {
5178                 if (skb->protocol == htons(ETH_P_IP))
5179                         tx_flags |= IXGBE_TX_FLAGS_IPV4;
5180                 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5181                 if (tso < 0) {
5182                         dev_kfree_skb_any(skb);
5183                         return NETDEV_TX_OK;
5184                 }
5185
5186                 if (tso)
5187                         tx_flags |= IXGBE_TX_FLAGS_TSO;
5188                 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5189                          (skb->ip_summed == CHECKSUM_PARTIAL))
5190                         tx_flags |= IXGBE_TX_FLAGS_CSUM;
5191         }
5192
5193         count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5194         if (count) {
5195                 /* add the ATR filter if ATR is on */
5196                 if (tx_ring->atr_sample_rate) {
5197                         ++tx_ring->atr_count;
5198                         if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5199                              test_bit(__IXGBE_FDIR_INIT_DONE,
5200                                       &tx_ring->reinit_state)) {
5201                                 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5202                                           tx_flags);
5203                                 tx_ring->atr_count = 0;
5204                         }
5205                 }
5206                 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5207                                hdr_len);
5208                 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5209
5210         } else {
5211                 dev_kfree_skb_any(skb);
5212                 tx_ring->tx_buffer_info[first].time_stamp = 0;
5213                 tx_ring->next_to_use = first;
5214         }
5215
5216         return NETDEV_TX_OK;
5217 }
5218
5219 /**
5220  * ixgbe_get_stats - Get System Network Statistics
5221  * @netdev: network interface device structure
5222  *
5223  * Returns the address of the device statistics structure.
5224  * The statistics are actually updated from the timer callback.
5225  **/
5226 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5227 {
5228         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5229
5230         /* only return the current stats */
5231         return &adapter->net_stats;
5232 }
5233
5234 /**
5235  * ixgbe_set_mac - Change the Ethernet Address of the NIC
5236  * @netdev: network interface device structure
5237  * @p: pointer to an address structure
5238  *
5239  * Returns 0 on success, negative on failure
5240  **/
5241 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5242 {
5243         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5244         struct ixgbe_hw *hw = &adapter->hw;
5245         struct sockaddr *addr = p;
5246
5247         if (!is_valid_ether_addr(addr->sa_data))
5248                 return -EADDRNOTAVAIL;
5249
5250         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5251         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5252
5253         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5254
5255         return 0;
5256 }
5257
5258 static int
5259 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5260 {
5261         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5262         struct ixgbe_hw *hw = &adapter->hw;
5263         u16 value;
5264         int rc;
5265
5266         if (prtad != hw->phy.mdio.prtad)
5267                 return -EINVAL;
5268         rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5269         if (!rc)
5270                 rc = value;
5271         return rc;
5272 }
5273
5274 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5275                             u16 addr, u16 value)
5276 {
5277         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5278         struct ixgbe_hw *hw = &adapter->hw;
5279
5280         if (prtad != hw->phy.mdio.prtad)
5281                 return -EINVAL;
5282         return hw->phy.ops.write_reg(hw, addr, devad, value);
5283 }
5284
5285 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5286 {
5287         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5288
5289         return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5290 }
5291
5292 /**
5293  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5294  * netdev->dev_addrs
5295  * @netdev: network interface device structure
5296  *
5297  * Returns non-zero on failure
5298  **/
5299 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5300 {
5301         int err = 0;
5302         struct ixgbe_adapter *adapter = netdev_priv(dev);
5303         struct ixgbe_mac_info *mac = &adapter->hw.mac;
5304
5305         if (is_valid_ether_addr(mac->san_addr)) {
5306                 rtnl_lock();
5307                 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5308                 rtnl_unlock();
5309         }
5310         return err;
5311 }
5312
5313 /**
5314  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5315  * netdev->dev_addrs
5316  * @netdev: network interface device structure
5317  *
5318  * Returns non-zero on failure
5319  **/
5320 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5321 {
5322         int err = 0;
5323         struct ixgbe_adapter *adapter = netdev_priv(dev);
5324         struct ixgbe_mac_info *mac = &adapter->hw.mac;
5325
5326         if (is_valid_ether_addr(mac->san_addr)) {
5327                 rtnl_lock();
5328                 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5329                 rtnl_unlock();
5330         }
5331         return err;
5332 }
5333
5334 #ifdef CONFIG_NET_POLL_CONTROLLER
5335 /*
5336  * Polling 'interrupt' - used by things like netconsole to send skbs
5337  * without having to re-enable interrupts. It's not called while
5338  * the interrupt routine is executing.
5339  */
5340 static void ixgbe_netpoll(struct net_device *netdev)
5341 {
5342         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5343         int i;
5344
5345         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5346         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5347                 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5348                 for (i = 0; i < num_q_vectors; i++) {
5349                         struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5350                         ixgbe_msix_clean_many(0, q_vector);
5351                 }
5352         } else {
5353                 ixgbe_intr(adapter->pdev->irq, netdev);
5354         }
5355         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5356 }
5357 #endif
5358
5359 static const struct net_device_ops ixgbe_netdev_ops = {
5360         .ndo_open               = ixgbe_open,
5361         .ndo_stop               = ixgbe_close,
5362         .ndo_start_xmit         = ixgbe_xmit_frame,
5363         .ndo_select_queue       = ixgbe_select_queue,
5364         .ndo_get_stats          = ixgbe_get_stats,
5365         .ndo_set_rx_mode        = ixgbe_set_rx_mode,
5366         .ndo_set_multicast_list = ixgbe_set_rx_mode,
5367         .ndo_validate_addr      = eth_validate_addr,
5368         .ndo_set_mac_address    = ixgbe_set_mac,
5369         .ndo_change_mtu         = ixgbe_change_mtu,
5370         .ndo_tx_timeout         = ixgbe_tx_timeout,
5371         .ndo_vlan_rx_register   = ixgbe_vlan_rx_register,
5372         .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
5373         .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
5374         .ndo_do_ioctl           = ixgbe_ioctl,
5375 #ifdef CONFIG_NET_POLL_CONTROLLER
5376         .ndo_poll_controller    = ixgbe_netpoll,
5377 #endif
5378 #ifdef IXGBE_FCOE
5379         .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5380         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5381         .ndo_fcoe_enable = ixgbe_fcoe_enable,
5382         .ndo_fcoe_disable = ixgbe_fcoe_disable,
5383 #endif /* IXGBE_FCOE */
5384 };
5385
5386 /**
5387  * ixgbe_probe - Device Initialization Routine
5388  * @pdev: PCI device information struct
5389  * @ent: entry in ixgbe_pci_tbl
5390  *
5391  * Returns 0 on success, negative on failure
5392  *
5393  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5394  * The OS initialization, configuring of the adapter private structure,
5395  * and a hardware reset occur.
5396  **/
5397 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5398                                  const struct pci_device_id *ent)
5399 {
5400         struct net_device *netdev;
5401         struct ixgbe_adapter *adapter = NULL;
5402         struct ixgbe_hw *hw;
5403         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5404         static int cards_found;
5405         int i, err, pci_using_dac;
5406 #ifdef IXGBE_FCOE
5407         u16 device_caps;
5408 #endif
5409         u32 part_num, eec;
5410
5411         err = pci_enable_device_mem(pdev);
5412         if (err)
5413                 return err;
5414
5415         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5416             !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5417                 pci_using_dac = 1;
5418         } else {
5419                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5420                 if (err) {
5421                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5422                         if (err) {
5423                                 dev_err(&pdev->dev, "No usable DMA "
5424                                         "configuration, aborting\n");
5425                                 goto err_dma;
5426                         }
5427                 }
5428                 pci_using_dac = 0;
5429         }
5430
5431         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5432                                            IORESOURCE_MEM), ixgbe_driver_name);
5433         if (err) {
5434                 dev_err(&pdev->dev,
5435                         "pci_request_selected_regions failed 0x%x\n", err);
5436                 goto err_pci_reg;
5437         }
5438
5439         err = pci_enable_pcie_error_reporting(pdev);
5440         if (err) {
5441                 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5442                                     "0x%x\n", err);
5443                 /* non-fatal, continue */
5444         }
5445
5446         pci_set_master(pdev);
5447         pci_save_state(pdev);
5448
5449         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5450         if (!netdev) {
5451                 err = -ENOMEM;
5452                 goto err_alloc_etherdev;
5453         }
5454
5455         SET_NETDEV_DEV(netdev, &pdev->dev);
5456
5457         pci_set_drvdata(pdev, netdev);
5458         adapter = netdev_priv(netdev);
5459
5460         adapter->netdev = netdev;
5461         adapter->pdev = pdev;
5462         hw = &adapter->hw;
5463         hw->back = adapter;
5464         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5465
5466         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5467                               pci_resource_len(pdev, 0));
5468         if (!hw->hw_addr) {
5469                 err = -EIO;
5470                 goto err_ioremap;
5471         }
5472
5473         for (i = 1; i <= 5; i++) {
5474                 if (pci_resource_len(pdev, i) == 0)
5475                         continue;
5476         }
5477
5478         netdev->netdev_ops = &ixgbe_netdev_ops;
5479         ixgbe_set_ethtool_ops(netdev);
5480         netdev->watchdog_timeo = 5 * HZ;
5481         strcpy(netdev->name, pci_name(pdev));
5482
5483         adapter->bd_number = cards_found;
5484
5485         /* Setup hw api */
5486         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5487         hw->mac.type  = ii->mac;
5488
5489         /* EEPROM */
5490         memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5491         eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5492         /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5493         if (!(eec & (1 << 8)))
5494                 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5495
5496         /* PHY */
5497         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5498         hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5499         /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5500         hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5501         hw->phy.mdio.mmds = 0;
5502         hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5503         hw->phy.mdio.dev = netdev;
5504         hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5505         hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5506
5507         /* set up this timer and work struct before calling get_invariants
5508          * which might start the timer
5509          */
5510         init_timer(&adapter->sfp_timer);
5511         adapter->sfp_timer.function = &ixgbe_sfp_timer;
5512         adapter->sfp_timer.data = (unsigned long) adapter;
5513
5514         INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5515
5516         /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5517         INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5518
5519         /* a new SFP+ module arrival, called from GPI SDP2 context */
5520         INIT_WORK(&adapter->sfp_config_module_task,
5521                   ixgbe_sfp_config_module_task);
5522
5523         ii->get_invariants(hw);
5524
5525         /* setup the private structure */
5526         err = ixgbe_sw_init(adapter);
5527         if (err)
5528                 goto err_sw_init;
5529
5530         /*
5531          * If there is a fan on this device and it has failed log the
5532          * failure.
5533          */
5534         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5535                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5536                 if (esdp & IXGBE_ESDP_SDP1)
5537                         DPRINTK(PROBE, CRIT,
5538                                 "Fan has stopped, replace the adapter\n");
5539         }
5540
5541         /* reset_hw fills in the perm_addr as well */
5542         err = hw->mac.ops.reset_hw(hw);
5543         if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5544             hw->mac.type == ixgbe_mac_82598EB) {
5545                 /*
5546                  * Start a kernel thread to watch for a module to arrive.
5547                  * Only do this for 82598, since 82599 will generate
5548                  * interrupts on module arrival.
5549                  */
5550                 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5551                 mod_timer(&adapter->sfp_timer,
5552                           round_jiffies(jiffies + (2 * HZ)));
5553                 err = 0;
5554         } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5555                 dev_err(&adapter->pdev->dev, "failed to initialize because "
5556                         "an unsupported SFP+ module type was detected.\n"
5557                         "Reload the driver after installing a supported "
5558                         "module.\n");
5559                 goto err_sw_init;
5560         } else if (err) {
5561                 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5562                 goto err_sw_init;
5563         }
5564
5565         netdev->features = NETIF_F_SG |
5566                            NETIF_F_IP_CSUM |
5567                            NETIF_F_HW_VLAN_TX |
5568                            NETIF_F_HW_VLAN_RX |
5569                            NETIF_F_HW_VLAN_FILTER;
5570
5571         netdev->features |= NETIF_F_IPV6_CSUM;
5572         netdev->features |= NETIF_F_TSO;
5573         netdev->features |= NETIF_F_TSO6;
5574         netdev->features |= NETIF_F_GRO;
5575
5576         if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5577                 netdev->features |= NETIF_F_SCTP_CSUM;
5578
5579         netdev->vlan_features |= NETIF_F_TSO;
5580         netdev->vlan_features |= NETIF_F_TSO6;
5581         netdev->vlan_features |= NETIF_F_IP_CSUM;
5582         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
5583         netdev->vlan_features |= NETIF_F_SG;
5584
5585         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5586                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5587
5588 #ifdef CONFIG_IXGBE_DCB
5589         netdev->dcbnl_ops = &dcbnl_ops;
5590 #endif
5591
5592 #ifdef IXGBE_FCOE
5593         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5594                 if (hw->mac.ops.get_device_caps) {
5595                         hw->mac.ops.get_device_caps(hw, &device_caps);
5596                         if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5597                                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5598                 }
5599         }
5600 #endif /* IXGBE_FCOE */
5601         if (pci_using_dac)
5602                 netdev->features |= NETIF_F_HIGHDMA;
5603
5604         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5605                 netdev->features |= NETIF_F_LRO;
5606
5607         /* make sure the EEPROM is good */
5608         if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5609                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5610                 err = -EIO;
5611                 goto err_eeprom;
5612         }
5613
5614         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5615         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5616
5617         if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5618                 dev_err(&pdev->dev, "invalid MAC address\n");
5619                 err = -EIO;
5620                 goto err_eeprom;
5621         }
5622
5623         init_timer(&adapter->watchdog_timer);
5624         adapter->watchdog_timer.function = &ixgbe_watchdog;
5625         adapter->watchdog_timer.data = (unsigned long)adapter;
5626
5627         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5628         INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5629
5630         err = ixgbe_init_interrupt_scheme(adapter);
5631         if (err)
5632                 goto err_sw_init;
5633
5634         switch (pdev->device) {
5635         case IXGBE_DEV_ID_82599_KX4:
5636                 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5637                                 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5638                 /* Enable ACPI wakeup in GRC */
5639                 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5640                              (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5641                 break;
5642         default:
5643                 adapter->wol = 0;
5644                 break;
5645         }
5646         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5647
5648         /* pick up the PCI bus settings for reporting later */
5649         hw->mac.ops.get_bus_info(hw);
5650
5651         /* print bus type/speed/width info */
5652         dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5653                 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5654                  (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5655                 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5656                  (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5657                  (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5658                  "Unknown"),
5659                 netdev->dev_addr);
5660         ixgbe_read_pba_num_generic(hw, &part_num);
5661         if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5662                 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5663                          hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5664                          (part_num >> 8), (part_num & 0xff));
5665         else
5666                 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5667                          hw->mac.type, hw->phy.type,
5668                          (part_num >> 8), (part_num & 0xff));
5669
5670         if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5671                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5672                          "this card is not sufficient for optimal "
5673                          "performance.\n");
5674                 dev_warn(&pdev->dev, "For optimal performance a x8 "
5675                          "PCI-Express slot is required.\n");
5676         }
5677
5678         /* save off EEPROM version number */
5679         hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5680
5681         /* reset the hardware with the new settings */
5682         err = hw->mac.ops.start_hw(hw);
5683
5684         if (err == IXGBE_ERR_EEPROM_VERSION) {
5685                 /* We are running on a pre-production device, log a warning */
5686                 dev_warn(&pdev->dev, "This device is a pre-production "
5687                          "adapter/LOM.  Please be aware there may be issues "
5688                          "associated with your hardware.  If you are "
5689                          "experiencing problems please contact your Intel or "
5690                          "hardware representative who provided you with this "
5691                          "hardware.\n");
5692         }
5693         strcpy(netdev->name, "eth%d");
5694         err = register_netdev(netdev);
5695         if (err)
5696                 goto err_register;
5697
5698         /* carrier off reporting is important to ethtool even BEFORE open */
5699         netif_carrier_off(netdev);
5700
5701         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5702             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5703                 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5704
5705 #ifdef CONFIG_IXGBE_DCA
5706         if (dca_add_requester(&pdev->dev) == 0) {
5707                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5708                 ixgbe_setup_dca(adapter);
5709         }
5710 #endif
5711         /* add san mac addr to netdev */
5712         ixgbe_add_sanmac_netdev(netdev);
5713
5714         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5715         cards_found++;
5716         return 0;
5717
5718 err_register:
5719         ixgbe_release_hw_control(adapter);
5720         ixgbe_clear_interrupt_scheme(adapter);
5721 err_sw_init:
5722 err_eeprom:
5723         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5724         del_timer_sync(&adapter->sfp_timer);
5725         cancel_work_sync(&adapter->sfp_task);
5726         cancel_work_sync(&adapter->multispeed_fiber_task);
5727         cancel_work_sync(&adapter->sfp_config_module_task);
5728         iounmap(hw->hw_addr);
5729 err_ioremap:
5730         free_netdev(netdev);
5731 err_alloc_etherdev:
5732         pci_release_selected_regions(pdev, pci_select_bars(pdev,
5733                                      IORESOURCE_MEM));
5734 err_pci_reg:
5735 err_dma:
5736         pci_disable_device(pdev);
5737         return err;
5738 }
5739
5740 /**
5741  * ixgbe_remove - Device Removal Routine
5742  * @pdev: PCI device information struct
5743  *
5744  * ixgbe_remove is called by the PCI subsystem to alert the driver
5745  * that it should release a PCI device.  The could be caused by a
5746  * Hot-Plug event, or because the driver is going to be removed from
5747  * memory.
5748  **/
5749 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5750 {
5751         struct net_device *netdev = pci_get_drvdata(pdev);
5752         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5753         int err;
5754
5755         set_bit(__IXGBE_DOWN, &adapter->state);
5756         /* clear the module not found bit to make sure the worker won't
5757          * reschedule
5758          */
5759         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5760         del_timer_sync(&adapter->watchdog_timer);
5761
5762         del_timer_sync(&adapter->sfp_timer);
5763         cancel_work_sync(&adapter->watchdog_task);
5764         cancel_work_sync(&adapter->sfp_task);
5765         cancel_work_sync(&adapter->multispeed_fiber_task);
5766         cancel_work_sync(&adapter->sfp_config_module_task);
5767         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5768             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5769                 cancel_work_sync(&adapter->fdir_reinit_task);
5770         flush_scheduled_work();
5771
5772 #ifdef CONFIG_IXGBE_DCA
5773         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5774                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5775                 dca_remove_requester(&pdev->dev);
5776                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5777         }
5778
5779 #endif
5780 #ifdef IXGBE_FCOE
5781         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5782                 ixgbe_cleanup_fcoe(adapter);
5783
5784 #endif /* IXGBE_FCOE */
5785
5786         /* remove the added san mac */
5787         ixgbe_del_sanmac_netdev(netdev);
5788
5789         if (netdev->reg_state == NETREG_REGISTERED)
5790                 unregister_netdev(netdev);
5791
5792         ixgbe_clear_interrupt_scheme(adapter);
5793
5794         ixgbe_release_hw_control(adapter);
5795
5796         iounmap(adapter->hw.hw_addr);
5797         pci_release_selected_regions(pdev, pci_select_bars(pdev,
5798                                      IORESOURCE_MEM));
5799
5800         DPRINTK(PROBE, INFO, "complete\n");
5801
5802         free_netdev(netdev);
5803
5804         err = pci_disable_pcie_error_reporting(pdev);
5805         if (err)
5806                 dev_err(&pdev->dev,
5807                         "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5808
5809         pci_disable_device(pdev);
5810 }
5811
5812 /**
5813  * ixgbe_io_error_detected - called when PCI error is detected
5814  * @pdev: Pointer to PCI device
5815  * @state: The current pci connection state
5816  *
5817  * This function is called after a PCI bus error affecting
5818  * this device has been detected.
5819  */
5820 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5821                                                 pci_channel_state_t state)
5822 {
5823         struct net_device *netdev = pci_get_drvdata(pdev);
5824         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5825
5826         netif_device_detach(netdev);
5827
5828         if (state == pci_channel_io_perm_failure)
5829                 return PCI_ERS_RESULT_DISCONNECT;
5830
5831         if (netif_running(netdev))
5832                 ixgbe_down(adapter);
5833         pci_disable_device(pdev);
5834
5835         /* Request a slot reset. */
5836         return PCI_ERS_RESULT_NEED_RESET;
5837 }
5838
5839 /**
5840  * ixgbe_io_slot_reset - called after the pci bus has been reset.
5841  * @pdev: Pointer to PCI device
5842  *
5843  * Restart the card from scratch, as if from a cold-boot.
5844  */
5845 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5846 {
5847         struct net_device *netdev = pci_get_drvdata(pdev);
5848         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5849         pci_ers_result_t result;
5850         int err;
5851
5852         if (pci_enable_device_mem(pdev)) {
5853                 DPRINTK(PROBE, ERR,
5854                         "Cannot re-enable PCI device after reset.\n");
5855                 result = PCI_ERS_RESULT_DISCONNECT;
5856         } else {
5857                 pci_set_master(pdev);
5858                 pci_restore_state(pdev);
5859
5860                 pci_wake_from_d3(pdev, false);
5861
5862                 ixgbe_reset(adapter);
5863                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5864                 result = PCI_ERS_RESULT_RECOVERED;
5865         }
5866
5867         err = pci_cleanup_aer_uncorrect_error_status(pdev);
5868         if (err) {
5869                 dev_err(&pdev->dev,
5870                   "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5871                 /* non-fatal, continue */
5872         }
5873
5874         return result;
5875 }
5876
5877 /**
5878  * ixgbe_io_resume - called when traffic can start flowing again.
5879  * @pdev: Pointer to PCI device
5880  *
5881  * This callback is called when the error recovery driver tells us that
5882  * its OK to resume normal operation.
5883  */
5884 static void ixgbe_io_resume(struct pci_dev *pdev)
5885 {
5886         struct net_device *netdev = pci_get_drvdata(pdev);
5887         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5888
5889         if (netif_running(netdev)) {
5890                 if (ixgbe_up(adapter)) {
5891                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5892                         return;
5893                 }
5894         }
5895
5896         netif_device_attach(netdev);
5897 }
5898
5899 static struct pci_error_handlers ixgbe_err_handler = {
5900         .error_detected = ixgbe_io_error_detected,
5901         .slot_reset = ixgbe_io_slot_reset,
5902         .resume = ixgbe_io_resume,
5903 };
5904
5905 static struct pci_driver ixgbe_driver = {
5906         .name     = ixgbe_driver_name,
5907         .id_table = ixgbe_pci_tbl,
5908         .probe    = ixgbe_probe,
5909         .remove   = __devexit_p(ixgbe_remove),
5910 #ifdef CONFIG_PM
5911         .suspend  = ixgbe_suspend,
5912         .resume   = ixgbe_resume,
5913 #endif
5914         .shutdown = ixgbe_shutdown,
5915         .err_handler = &ixgbe_err_handler
5916 };
5917
5918 /**
5919  * ixgbe_init_module - Driver Registration Routine
5920  *
5921  * ixgbe_init_module is the first routine called when the driver is
5922  * loaded. All it does is register with the PCI subsystem.
5923  **/
5924 static int __init ixgbe_init_module(void)
5925 {
5926         int ret;
5927         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5928                ixgbe_driver_string, ixgbe_driver_version);
5929
5930         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5931
5932 #ifdef CONFIG_IXGBE_DCA
5933         dca_register_notify(&dca_notifier);
5934 #endif
5935
5936         ret = pci_register_driver(&ixgbe_driver);
5937         return ret;
5938 }
5939
5940 module_init(ixgbe_init_module);
5941
5942 /**
5943  * ixgbe_exit_module - Driver Exit Cleanup Routine
5944  *
5945  * ixgbe_exit_module is called just before the driver is removed
5946  * from memory.
5947  **/
5948 static void __exit ixgbe_exit_module(void)
5949 {
5950 #ifdef CONFIG_IXGBE_DCA
5951         dca_unregister_notify(&dca_notifier);
5952 #endif
5953         pci_unregister_driver(&ixgbe_driver);
5954 }
5955
5956 #ifdef CONFIG_IXGBE_DCA
5957 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
5958                             void *p)
5959 {
5960         int ret_val;
5961
5962         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
5963                                          __ixgbe_notify_dca);
5964
5965         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
5966 }
5967
5968 #endif /* CONFIG_IXGBE_DCA */
5969 #ifdef DEBUG
5970 /**
5971  * ixgbe_get_hw_dev_name - return device name string
5972  * used by hardware layer to print debugging information
5973  **/
5974 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
5975 {
5976         struct ixgbe_adapter *adapter = hw->back;
5977         return adapter->netdev->name;
5978 }
5979
5980 #endif
5981 module_exit(ixgbe_exit_module);
5982
5983 /* ixgbe_main.c */