drivers/net/ixgbe/ixgbe_main.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2007 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   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.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
  44 #include "ixgbe.h"
  45 #include "ixgbe_common.h"
  46
  47 char ixgbe_driver_name[] = "ixgbe";
  48 static const char ixgbe_driver_string[] =
  49         "Intel(R) 10 Gigabit PCI Express Network Driver";
  50
  51 #define DRV_VERSION "1.1.18"
  52 const char ixgbe_driver_version[] = DRV_VERSION;
  53 static const char ixgbe_copyright[] =
  54          "Copyright (c) 1999-2007 Intel Corporation.";
  55
  56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  57         [board_82598]                   = &ixgbe_82598_info,
  58 };
  59
  60 /* ixgbe_pci_tbl - PCI Device ID Table
  61  *
  62  * Wildcard entries (PCI_ANY_ID) should come last
  63  * Last entry must be all 0s
  64  *
  65  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  66  *   Class, Class Mask, private data (not used) }
  67  */
  68 static struct pci_device_id ixgbe_pci_tbl[] = {
  69         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  70          board_82598 },
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  72          board_82598 },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
  74          board_82598 },
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  76          board_82598 },
  77
  78         /* required last entry */
  79         {0, }
  80 };
  81 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
  82
  83 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  84 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
  85 MODULE_LICENSE("GPL");
  86 MODULE_VERSION(DRV_VERSION);
  87
  88 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  89
  90
  91 #ifdef DEBUG
  92 /**
  93  * ixgbe_get_hw_dev_name - return device name string
  94  * used by hardware layer to print debugging information
  95  **/
  96 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
  97 {
  98         struct ixgbe_adapter *adapter = hw->back;
  99         struct net_device *netdev = adapter->netdev;
 100         return netdev->name;
 101 }
 102 #endif
 103
 104 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
 105                            u8 msix_vector)
 106 {
 107         u32 ivar, index;
 108
 109         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 110         index = (int_alloc_entry >> 2) & 0x1F;
 111         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
 112         ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
 113         ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
 114         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
 115 }
 116
 117 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 118                                              struct ixgbe_tx_buffer
 119                                              *tx_buffer_info)
 120 {
 121         if (tx_buffer_info->dma) {
 122                 pci_unmap_page(adapter->pdev,
 123                                tx_buffer_info->dma,
 124                                tx_buffer_info->length, PCI_DMA_TODEVICE);
 125                 tx_buffer_info->dma = 0;
 126         }
 127         if (tx_buffer_info->skb) {
 128                 dev_kfree_skb_any(tx_buffer_info->skb);
 129                 tx_buffer_info->skb = NULL;
 130         }
 131         /* tx_buffer_info must be completely set up in the transmit path */
 132 }
 133
 134 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 135                                        struct ixgbe_ring *tx_ring,
 136                                        unsigned int eop,
 137                                        union ixgbe_adv_tx_desc *eop_desc)
 138 {
 139         /* Detect a transmit hang in hardware, this serializes the
 140          * check with the clearing of time_stamp and movement of i */
 141         adapter->detect_tx_hung = false;
 142         if (tx_ring->tx_buffer_info[eop].dma &&
 143             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 144             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 145                 /* detected Tx unit hang */
 146                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 147                         "  TDH                  <%x>\n"
 148                         "  TDT                  <%x>\n"
 149                         "  next_to_use          <%x>\n"
 150                         "  next_to_clean        <%x>\n"
 151                         "tx_buffer_info[next_to_clean]\n"
 152                         "  time_stamp           <%lx>\n"
 153                         "  next_to_watch        <%x>\n"
 154                         "  jiffies              <%lx>\n"
 155                         "  next_to_watch.status <%x>\n",
 156                         readl(adapter->hw.hw_addr + tx_ring->head),
 157                         readl(adapter->hw.hw_addr + tx_ring->tail),
 158                         tx_ring->next_to_use,
 159                         tx_ring->next_to_clean,
 160                         tx_ring->tx_buffer_info[eop].time_stamp,
 161                         eop, jiffies, eop_desc->wb.status);
 162                 return true;
 163         }
 164
 165         return false;
 166 }
 167
 168 /**
 169  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 170  * @adapter: board private structure
 171  **/
 172 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 173                                     struct ixgbe_ring *tx_ring)
 174 {
 175         struct net_device *netdev = adapter->netdev;
 176         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 177         struct ixgbe_tx_buffer *tx_buffer_info;
 178         unsigned int i, eop;
 179         bool cleaned = false;
 180         int count = 0;
 181
 182         i = tx_ring->next_to_clean;
 183         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 184         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 185         while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
 186                 for (cleaned = false; !cleaned;) {
 187                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 188                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 189                         cleaned = (i == eop);
 190
 191                         tx_ring->stats.bytes += tx_buffer_info->length;
 192                         ixgbe_unmap_and_free_tx_resource(adapter,
 193                                                          tx_buffer_info);
 194                         tx_desc->wb.status = 0;
 195
 196                         i++;
 197                         if (i == tx_ring->count)
 198                                 i = 0;
 199                 }
 200
 201                 tx_ring->stats.packets++;
 202
 203                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 204                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 205
 206                 /* weight of a sort for tx, avoid endless transmit cleanup */
 207                 if (count++ >= tx_ring->work_limit)
 208                         break;
 209         }
 210
 211         tx_ring->next_to_clean = i;
 212
 213 #define TX_WAKE_THRESHOLD 32
 214         spin_lock(&tx_ring->tx_lock);
 215
 216         if (cleaned && netif_carrier_ok(netdev) &&
 217             (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD) &&
 218             !test_bit(__IXGBE_DOWN, &adapter->state))
 219                 netif_wake_queue(netdev);
 220
 221         spin_unlock(&tx_ring->tx_lock);
 222
 223         if (adapter->detect_tx_hung)
 224                 if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
 225                         netif_stop_queue(netdev);
 226
 227         if (count >= tx_ring->work_limit)
 228                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
 229
 230         return cleaned;
 231 }
 232
 233 /**
 234  * ixgbe_receive_skb - Send a completed packet up the stack
 235  * @adapter: board private structure
 236  * @skb: packet to send up
 237  * @is_vlan: packet has a VLAN tag
 238  * @tag: VLAN tag from descriptor
 239  **/
 240 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
 241                               struct sk_buff *skb, bool is_vlan,
 242                               u16 tag)
 243 {
 244         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 245                 if (adapter->vlgrp && is_vlan)
 246                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
 247                 else
 248                         netif_receive_skb(skb);
 249         } else {
 250
 251                 if (adapter->vlgrp && is_vlan)
 252                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 253                 else
 254                         netif_rx(skb);
 255         }
 256 }
 257
 258 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 259                                          u32 status_err,
 260                                          struct sk_buff *skb)
 261 {
 262         skb->ip_summed = CHECKSUM_NONE;
 263
 264         /* Ignore Checksum bit is set */
 265         if ((status_err & IXGBE_RXD_STAT_IXSM) ||
 266                      !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 267                 return;
 268         /* TCP/UDP checksum error bit is set */
 269         if (status_err & (IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE)) {
 270                 /* let the stack verify checksum errors */
 271                 adapter->hw_csum_rx_error++;
 272                 return;
 273         }
 274         /* It must be a TCP or UDP packet with a valid checksum */
 275         if (status_err & (IXGBE_RXD_STAT_L4CS | IXGBE_RXD_STAT_UDPCS))
 276                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 277         adapter->hw_csum_rx_good++;
 278 }
 279
 280 /**
 281  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 282  * @adapter: address of board private structure
 283  **/
 284 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 285                                        struct ixgbe_ring *rx_ring,
 286                                        int cleaned_count)
 287 {
 288         struct net_device *netdev = adapter->netdev;
 289         struct pci_dev *pdev = adapter->pdev;
 290         union ixgbe_adv_rx_desc *rx_desc;
 291         struct ixgbe_rx_buffer *rx_buffer_info;
 292         struct sk_buff *skb;
 293         unsigned int i;
 294         unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 295
 296         i = rx_ring->next_to_use;
 297         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 298
 299         while (cleaned_count--) {
 300                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 301
 302                 if (!rx_buffer_info->page &&
 303                                 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 304                         rx_buffer_info->page = alloc_page(GFP_ATOMIC);
 305                         if (!rx_buffer_info->page) {
 306                                 adapter->alloc_rx_page_failed++;
 307                                 goto no_buffers;
 308                         }
 309                         rx_buffer_info->page_dma =
 310                             pci_map_page(pdev, rx_buffer_info->page,
 311                                          0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 312                 }
 313
 314                 if (!rx_buffer_info->skb) {
 315                         skb = netdev_alloc_skb(netdev, bufsz);
 316
 317                         if (!skb) {
 318                                 adapter->alloc_rx_buff_failed++;
 319                                 goto no_buffers;
 320                         }
 321
 322                         /*
 323                          * Make buffer alignment 2 beyond a 16 byte boundary
 324                          * this will result in a 16 byte aligned IP header after
 325                          * the 14 byte MAC header is removed
 326                          */
 327                         skb_reserve(skb, NET_IP_ALIGN);
 328
 329                         rx_buffer_info->skb = skb;
 330                         rx_buffer_info->dma = pci_map_single(pdev, skb->data,
 331                                                           bufsz,
 332                                                           PCI_DMA_FROMDEVICE);
 333                 }
 334                 /* Refresh the desc even if buffer_addrs didn't change because
 335                  * each write-back erases this info. */
 336                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 337                         rx_desc->read.pkt_addr =
 338                             cpu_to_le64(rx_buffer_info->page_dma);
 339                         rx_desc->read.hdr_addr =
 340                                         cpu_to_le64(rx_buffer_info->dma);
 341                 } else {
 342                         rx_desc->read.pkt_addr =
 343                                         cpu_to_le64(rx_buffer_info->dma);
 344                 }
 345
 346                 i++;
 347                 if (i == rx_ring->count)
 348                         i = 0;
 349                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 350         }
 351 no_buffers:
 352         if (rx_ring->next_to_use != i) {
 353                 rx_ring->next_to_use = i;
 354                 if (i-- == 0)
 355                         i = (rx_ring->count - 1);
 356
 357                 /*
 358                  * Force memory writes to complete before letting h/w
 359                  * know there are new descriptors to fetch.  (Only
 360                  * applicable for weak-ordered memory model archs,
 361                  * such as IA-64).
 362                  */
 363                 wmb();
 364                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 365         }
 366 }
 367
 368 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 369                                struct ixgbe_ring *rx_ring,
 370                                int *work_done, int work_to_do)
 371 {
 372         struct net_device *netdev = adapter->netdev;
 373         struct pci_dev *pdev = adapter->pdev;
 374         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 375         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 376         struct sk_buff *skb;
 377         unsigned int i;
 378         u32 upper_len, len, staterr;
 379         u16 hdr_info, vlan_tag;
 380         bool is_vlan, cleaned = false;
 381         int cleaned_count = 0;
 382
 383         i = rx_ring->next_to_clean;
 384         upper_len = 0;
 385         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 386         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 387         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 388         is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 389         vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 390
 391         while (staterr & IXGBE_RXD_STAT_DD) {
 392                 if (*work_done >= work_to_do)
 393                         break;
 394                 (*work_done)++;
 395
 396                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 397                         hdr_info =
 398                             le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
 399                         len =
 400                             ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 401                              IXGBE_RXDADV_HDRBUFLEN_SHIFT);
 402                         if (hdr_info & IXGBE_RXDADV_SPH)
 403                                 adapter->rx_hdr_split++;
 404                         if (len > IXGBE_RX_HDR_SIZE)
 405                                 len = IXGBE_RX_HDR_SIZE;
 406                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 407                 } else
 408                         len = le16_to_cpu(rx_desc->wb.upper.length);
 409
 410                 cleaned = true;
 411                 skb = rx_buffer_info->skb;
 412                 prefetch(skb->data - NET_IP_ALIGN);
 413                 rx_buffer_info->skb = NULL;
 414
 415                 if (len && !skb_shinfo(skb)->nr_frags) {
 416                         pci_unmap_single(pdev, rx_buffer_info->dma,
 417                                          adapter->rx_buf_len + NET_IP_ALIGN,
 418                                          PCI_DMA_FROMDEVICE);
 419                         skb_put(skb, len);
 420                 }
 421
 422                 if (upper_len) {
 423                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 424                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
 425                         rx_buffer_info->page_dma = 0;
 426                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 427                                            rx_buffer_info->page, 0, upper_len);
 428                         rx_buffer_info->page = NULL;
 429
 430                         skb->len += upper_len;
 431                         skb->data_len += upper_len;
 432                         skb->truesize += upper_len;
 433                 }
 434
 435                 i++;
 436                 if (i == rx_ring->count)
 437                         i = 0;
 438                 next_buffer = &rx_ring->rx_buffer_info[i];
 439
 440                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 441                 prefetch(next_rxd);
 442
 443                 cleaned_count++;
 444                 if (staterr & IXGBE_RXD_STAT_EOP) {
 445                         rx_ring->stats.packets++;
 446                         rx_ring->stats.bytes += skb->len;
 447                 } else {
 448                         rx_buffer_info->skb = next_buffer->skb;
 449                         rx_buffer_info->dma = next_buffer->dma;
 450                         next_buffer->skb = skb;
 451                         adapter->non_eop_descs++;
 452                         goto next_desc;
 453                 }
 454
 455                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 456                         dev_kfree_skb_irq(skb);
 457                         goto next_desc;
 458                 }
 459
 460                 ixgbe_rx_checksum(adapter, staterr, skb);
 461                 skb->protocol = eth_type_trans(skb, netdev);
 462                 ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
 463                 netdev->last_rx = jiffies;
 464
 465 next_desc:
 466                 rx_desc->wb.upper.status_error = 0;
 467
 468                 /* return some buffers to hardware, one at a time is too slow */
 469                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 470                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 471                         cleaned_count = 0;
 472                 }
 473
 474                 /* use prefetched values */
 475                 rx_desc = next_rxd;
 476                 rx_buffer_info = next_buffer;
 477
 478                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 479                 is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 480                 vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 481         }
 482
 483         rx_ring->next_to_clean = i;
 484         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 485
 486         if (cleaned_count)
 487                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 488
 489         return cleaned;
 490 }
 491
 492 #define IXGBE_MAX_INTR 10
 493 /**
 494  * ixgbe_configure_msix - Configure MSI-X hardware
 495  * @adapter: board private structure
 496  *
 497  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 498  * interrupts.
 499  **/
 500 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 501 {
 502         int i, vector = 0;
 503
 504         for (i = 0; i < adapter->num_tx_queues; i++) {
 505                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i),
 506                                IXGBE_MSIX_VECTOR(vector));
 507                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->tx_eitr),
 508                        adapter->hw.hw_addr + adapter->tx_ring[i].itr_register);
 509                 vector++;
 510         }
 511
 512         for (i = 0; i < adapter->num_rx_queues; i++) {
 513                 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(i),
 514                                IXGBE_MSIX_VECTOR(vector));
 515                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr),
 516                        adapter->hw.hw_addr + adapter->rx_ring[i].itr_register);
 517                 vector++;
 518         }
 519
 520         vector = adapter->num_tx_queues + adapter->num_rx_queues;
 521         ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX,
 522                        IXGBE_MSIX_VECTOR(vector));
 523         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(vector), 1950);
 524 }
 525
 526 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 527 {
 528         struct net_device *netdev = data;
 529         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 530         struct ixgbe_hw *hw = &adapter->hw;
 531         u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 532
 533         if (eicr & IXGBE_EICR_LSC) {
 534                 adapter->lsc_int++;
 535                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 536                         mod_timer(&adapter->watchdog_timer, jiffies);
 537         }
 538
 539         if (!test_bit(__IXGBE_DOWN, &adapter->state))
 540                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
 541
 542         return IRQ_HANDLED;
 543 }
 544
 545 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 546 {
 547         struct ixgbe_ring *txr = data;
 548         struct ixgbe_adapter *adapter = txr->adapter;
 549
 550         ixgbe_clean_tx_irq(adapter, txr);
 551
 552         return IRQ_HANDLED;
 553 }
 554
 555 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 556 {
 557         struct ixgbe_ring *rxr = data;
 558         struct ixgbe_adapter *adapter = rxr->adapter;
 559
 560         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->eims_value);
 561         netif_rx_schedule(adapter->netdev, &adapter->napi);
 562         return IRQ_HANDLED;
 563 }
 564
 565 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 566 {
 567         struct ixgbe_adapter *adapter = container_of(napi,
 568                                         struct ixgbe_adapter, napi);
 569         struct net_device *netdev = adapter->netdev;
 570         int work_done = 0;
 571         struct ixgbe_ring *rxr = adapter->rx_ring;
 572
 573         /* Keep link state information with original netdev */
 574         if (!netif_carrier_ok(netdev))
 575                 goto quit_polling;
 576
 577         ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
 578
 579         /* If no Tx and not enough Rx work done, exit the polling mode */
 580         if ((work_done < budget) || !netif_running(netdev)) {
 581 quit_polling:
 582                 netif_rx_complete(netdev, napi);
 583                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 584                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 585                                         rxr->eims_value);
 586         }
 587
 588         return work_done;
 589 }
 590
 591 /**
 592  * ixgbe_setup_msix - Initialize MSI-X interrupts
 593  *
 594  * ixgbe_setup_msix allocates MSI-X vectors and requests
 595  * interrutps from the kernel.
 596  **/
 597 static int ixgbe_setup_msix(struct ixgbe_adapter *adapter)
 598 {
 599         struct net_device *netdev = adapter->netdev;
 600         int i, int_vector = 0, err = 0;
 601         int max_msix_count;
 602
 603         /* +1 for the LSC interrupt */
 604         max_msix_count = adapter->num_rx_queues + adapter->num_tx_queues + 1;
 605         adapter->msix_entries = kcalloc(max_msix_count,
 606                                         sizeof(struct msix_entry), GFP_KERNEL);
 607         if (!adapter->msix_entries)
 608                 return -ENOMEM;
 609
 610         for (i = 0; i < max_msix_count; i++)
 611                 adapter->msix_entries[i].entry = i;
 612
 613         err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
 614                               max_msix_count);
 615         if (err)
 616                 goto out;
 617
 618         for (i = 0; i < adapter->num_tx_queues; i++) {
 619                 sprintf(adapter->tx_ring[i].name, "%s-tx%d", netdev->name, i);
 620                 err = request_irq(adapter->msix_entries[int_vector].vector,
 621                                   &ixgbe_msix_clean_tx,
 622                                   0,
 623                                   adapter->tx_ring[i].name,
 624                                   &(adapter->tx_ring[i]));
 625                 if (err) {
 626                         DPRINTK(PROBE, ERR,
 627                                 "request_irq failed for MSIX interrupt "
 628                                 "Error: %d\n", err);
 629                         goto release_irqs;
 630                 }
 631                 adapter->tx_ring[i].eims_value =
 632                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 633                 adapter->tx_ring[i].itr_register = IXGBE_EITR(int_vector);
 634                 int_vector++;
 635         }
 636
 637         for (i = 0; i < adapter->num_rx_queues; i++) {
 638                 if (strlen(netdev->name) < (IFNAMSIZ - 5))
 639                         sprintf(adapter->rx_ring[i].name,
 640                                 "%s-rx%d", netdev->name, i);
 641                 else
 642                         memcpy(adapter->rx_ring[i].name,
 643                                netdev->name, IFNAMSIZ);
 644                 err = request_irq(adapter->msix_entries[int_vector].vector,
 645                                   &ixgbe_msix_clean_rx, 0,
 646                                   adapter->rx_ring[i].name,
 647                                   &(adapter->rx_ring[i]));
 648                 if (err) {
 649                         DPRINTK(PROBE, ERR,
 650                                 "request_irq failed for MSIX interrupt "
 651                                 "Error: %d\n", err);
 652                         goto release_irqs;
 653                 }
 654
 655                 adapter->rx_ring[i].eims_value =
 656                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 657                 adapter->rx_ring[i].itr_register = IXGBE_EITR(int_vector);
 658                 int_vector++;
 659         }
 660
 661         sprintf(adapter->lsc_name, "%s-lsc", netdev->name);
 662         err = request_irq(adapter->msix_entries[int_vector].vector,
 663                           &ixgbe_msix_lsc, 0, adapter->lsc_name, netdev);
 664         if (err) {
 665                 DPRINTK(PROBE, ERR,
 666                         "request_irq for msix_lsc failed: %d\n", err);
 667                 goto release_irqs;
 668         }
 669
 670         /* FIXME: implement netif_napi_remove() instead */
 671         adapter->napi.poll = ixgbe_clean_rxonly;
 672         adapter->flags |= IXGBE_FLAG_MSIX_ENABLED;
 673         return 0;
 674
 675 release_irqs:
 676         int_vector--;
 677         for (; int_vector >= adapter->num_tx_queues; int_vector--)
 678                 free_irq(adapter->msix_entries[int_vector].vector,
 679                          &(adapter->rx_ring[int_vector -
 680                                             adapter->num_tx_queues]));
 681
 682         for (; int_vector >= 0; int_vector--)
 683                 free_irq(adapter->msix_entries[int_vector].vector,
 684                          &(adapter->tx_ring[int_vector]));
 685 out:
 686         kfree(adapter->msix_entries);
 687         adapter->msix_entries = NULL;
 688         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 689         return err;
 690 }
 691
 692 /**
 693  * ixgbe_intr - Interrupt Handler
 694  * @irq: interrupt number
 695  * @data: pointer to a network interface device structure
 696  * @pt_regs: CPU registers structure
 697  **/
 698 static irqreturn_t ixgbe_intr(int irq, void *data)
 699 {
 700         struct net_device *netdev = data;
 701         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 702         struct ixgbe_hw *hw = &adapter->hw;
 703         u32 eicr;
 704
 705         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 706
 707         if (!eicr)
 708                 return IRQ_NONE;        /* Not our interrupt */
 709
 710         if (eicr & IXGBE_EICR_LSC) {
 711                 adapter->lsc_int++;
 712                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 713                         mod_timer(&adapter->watchdog_timer, jiffies);
 714         }
 715         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 716                 /* Disable interrupts and register for poll. The flush of the
 717                  * posted write is intentionally left out. */
 718                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 719                 __netif_rx_schedule(netdev, &adapter->napi);
 720         }
 721
 722         return IRQ_HANDLED;
 723 }
 724
 725 /**
 726  * ixgbe_request_irq - initialize interrupts
 727  * @adapter: board private structure
 728  *
 729  * Attempts to configure interrupts using the best available
 730  * capabilities of the hardware and kernel.
 731  **/
 732 static int ixgbe_request_irq(struct ixgbe_adapter *adapter, u32 *num_rx_queues)
 733 {
 734         struct net_device *netdev = adapter->netdev;
 735         int flags, err;
 736         irq_handler_t handler = ixgbe_intr;
 737
 738         flags = IRQF_SHARED;
 739
 740         err = ixgbe_setup_msix(adapter);
 741         if (!err)
 742                 goto request_done;
 743
 744         /*
 745          * if we can't do MSI-X, fall through and try MSI
 746          * No need to reallocate memory since we're decreasing the number of
 747          * queues. We just won't use the other ones, also it is freed correctly
 748          * on ixgbe_remove.
 749          */
 750         *num_rx_queues = 1;
 751
 752         /* do MSI */
 753         err = pci_enable_msi(adapter->pdev);
 754         if (!err) {
 755                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
 756                 flags &= ~IRQF_SHARED;
 757                 handler = &ixgbe_intr;
 758         }
 759
 760         err = request_irq(adapter->pdev->irq, handler, flags,
 761                           netdev->name, netdev);
 762         if (err)
 763                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
 764
 765 request_done:
 766         return err;
 767 }
 768
 769 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
 770 {
 771         struct net_device *netdev = adapter->netdev;
 772
 773         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
 774                 int i;
 775
 776                 for (i = 0; i < adapter->num_tx_queues; i++)
 777                         free_irq(adapter->msix_entries[i].vector,
 778                                  &(adapter->tx_ring[i]));
 779                 for (i = 0; i < adapter->num_rx_queues; i++)
 780                         free_irq(adapter->msix_entries[i +
 781                                                 adapter->num_tx_queues].vector,
 782                                 &(adapter->rx_ring[i]));
 783                 i = adapter->num_rx_queues + adapter->num_tx_queues;
 784                 free_irq(adapter->msix_entries[i].vector, netdev);
 785                 pci_disable_msix(adapter->pdev);
 786                 kfree(adapter->msix_entries);
 787                 adapter->msix_entries = NULL;
 788                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 789                 return;
 790         }
 791
 792         free_irq(adapter->pdev->irq, netdev);
 793         if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
 794                 pci_disable_msi(adapter->pdev);
 795                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
 796         }
 797 }
 798
 799 /**
 800  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 801  * @adapter: board private structure
 802  **/
 803 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
 804 {
 805         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 806         IXGBE_WRITE_FLUSH(&adapter->hw);
 807         synchronize_irq(adapter->pdev->irq);
 808 }
 809
 810 /**
 811  * ixgbe_irq_enable - Enable default interrupt generation settings
 812  * @adapter: board private structure
 813  **/
 814 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
 815 {
 816         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
 817                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC,
 818                                 (IXGBE_EIMS_ENABLE_MASK &
 819                                  ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC)));
 820         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 821                         IXGBE_EIMS_ENABLE_MASK);
 822         IXGBE_WRITE_FLUSH(&adapter->hw);
 823 }
 824
 825 /**
 826  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 827  *
 828  **/
 829 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
 830 {
 831         int i;
 832         struct ixgbe_hw *hw = &adapter->hw;
 833
 834         if (adapter->rx_eitr)
 835                 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
 836                                 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));
 837
 838         /* for re-triggering the interrupt in non-NAPI mode */
 839         adapter->rx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 840         adapter->tx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 841
 842         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
 843         for (i = 0; i < adapter->num_tx_queues; i++)
 844                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i), i);
 845 }
 846
 847 /**
 848  * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
 849  * @adapter: board private structure
 850  *
 851  * Configure the Tx unit of the MAC after a reset.
 852  **/
 853 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
 854 {
 855         u64 tdba;
 856         struct ixgbe_hw *hw = &adapter->hw;
 857         u32 i, tdlen;
 858
 859         /* Setup the HW Tx Head and Tail descriptor pointers */
 860         for (i = 0; i < adapter->num_tx_queues; i++) {
 861                 tdba = adapter->tx_ring[i].dma;
 862                 tdlen = adapter->tx_ring[i].count *
 863                     sizeof(union ixgbe_adv_tx_desc);
 864                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i), (tdba & DMA_32BIT_MASK));
 865                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
 866                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i), tdlen);
 867                 IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
 868                 IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);
 869                 adapter->tx_ring[i].head = IXGBE_TDH(i);
 870                 adapter->tx_ring[i].tail = IXGBE_TDT(i);
 871         }
 872
 873         IXGBE_WRITE_REG(hw, IXGBE_TIPG, IXGBE_TIPG_FIBER_DEFAULT);
 874 }
 875
 876 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
 877                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
 878
 879 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT                 2
 880 /**
 881  * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
 882  * @adapter: board private structure
 883  *
 884  * Configure the Rx unit of the MAC after a reset.
 885  **/
 886 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 887 {
 888         u64 rdba;
 889         struct ixgbe_hw *hw = &adapter->hw;
 890         struct net_device *netdev = adapter->netdev;
 891         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 892         u32 rdlen, rxctrl, rxcsum;
 893         u32 random[10];
 894         u32 reta, mrqc;
 895         int i;
 896         u32 fctrl, hlreg0;
 897         u32 srrctl;
 898         u32 pages;
 899
 900         /* Decide whether to use packet split mode or not */
 901         if (netdev->mtu > ETH_DATA_LEN)
 902                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
 903         else
 904                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
 905
 906         /* Set the RX buffer length according to the mode */
 907         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 908                 adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
 909         } else {
 910                 if (netdev->mtu <= ETH_DATA_LEN)
 911                         adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
 912                 else
 913                         adapter->rx_buf_len = ALIGN(max_frame, 1024);
 914         }
 915
 916         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
 917         fctrl |= IXGBE_FCTRL_BAM;
 918         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
 919
 920         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 921         if (adapter->netdev->mtu <= ETH_DATA_LEN)
 922                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
 923         else
 924                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 925         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
 926
 927         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
 928
 929         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
 930         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
 931         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
 932
 933         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 934                 srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 935                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
 936                 srrctl |= ((IXGBE_RX_HDR_SIZE <<
 937                             IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
 938                            IXGBE_SRRCTL_BSIZEHDR_MASK);
 939         } else {
 940                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
 941
 942                 if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
 943                         srrctl |=
 944                              IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 945                 else
 946                         srrctl |=
 947                              adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 948         }
 949         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);
 950
 951         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
 952         /* disable receives while setting up the descriptors */
 953         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
 954         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
 955
 956         /* Setup the HW Rx Head and Tail Descriptor Pointers and
 957          * the Base and Length of the Rx Descriptor Ring */
 958         for (i = 0; i < adapter->num_rx_queues; i++) {
 959                 rdba = adapter->rx_ring[i].dma;
 960                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
 961                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
 962                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
 963                 IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
 964                 IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
 965                 adapter->rx_ring[i].head = IXGBE_RDH(i);
 966                 adapter->rx_ring[i].tail = IXGBE_RDT(i);
 967         }
 968
 969         if (adapter->num_rx_queues > 1) {
 970                 /* Random 40bytes used as random key in RSS hash function */
 971                 get_random_bytes(&random[0], 40);
 972
 973                 switch (adapter->num_rx_queues) {
 974                 case 8:
 975                 case 4:
 976                         /* Bits [3:0] in each byte refers the Rx queue no */
 977                         reta = 0x00010203;
 978                         break;
 979                 case 2:
 980                         reta = 0x00010001;
 981                         break;
 982                 default:
 983                         reta = 0x00000000;
 984                         break;
 985                 }
 986
 987                 /* Fill out redirection table */
 988                 for (i = 0; i < 32; i++) {
 989                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i, reta);
 990                         if (adapter->num_rx_queues > 4) {
 991                                 i++;
 992                                 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i,
 993                                                       0x04050607);
 994                         }
 995                 }
 996
 997                 /* Fill out hash function seeds */
 998                 for (i = 0; i < 10; i++)
 999                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RSSRK(0), i, random[i]);
1000
1001                 mrqc = IXGBE_MRQC_RSSEN
1002                     /* Perform hash on these packet types */
1003                     | IXGBE_MRQC_RSS_FIELD_IPV4
1004                     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1005                     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1006                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1007                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1008                     | IXGBE_MRQC_RSS_FIELD_IPV6
1009                     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1010                     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1011                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1012                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1013
1014                 /* Multiqueue and packet checksumming are mutually exclusive. */
1015                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1016                 rxcsum |= IXGBE_RXCSUM_PCSD;
1017                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1018         } else {
1019                 /* Enable Receive Checksum Offload for TCP and UDP */
1020                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1021                 if (adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1022                         /* Enable IPv4 payload checksum for UDP fragments
1023                          * Must be used in conjunction with packet-split. */
1024                         rxcsum |= IXGBE_RXCSUM_IPPCSE;
1025                 } else {
1026                         /* don't need to clear IPPCSE as it defaults to 0 */
1027                 }
1028                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1029         }
1030         /* Enable Receives */
1031         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
1032         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1033 }
1034
1035 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1036                                    struct vlan_group *grp)
1037 {
1038         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1039         u32 ctrl;
1040
1041         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1042                 ixgbe_irq_disable(adapter);
1043         adapter->vlgrp = grp;
1044
1045         if (grp) {
1046                 /* enable VLAN tag insert/strip */
1047                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1048                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
1049                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1050                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1051         }
1052
1053         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1054                 ixgbe_irq_enable(adapter);
1055 }
1056
1057 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1058 {
1059         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1060
1061         /* add VID to filter table */
1062         ixgbe_set_vfta(&adapter->hw, vid, 0, true);
1063 }
1064
1065 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1066 {
1067         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1068
1069         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1070                 ixgbe_irq_disable(adapter);
1071
1072         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1073
1074         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1075                 ixgbe_irq_enable(adapter);
1076
1077         /* remove VID from filter table */
1078         ixgbe_set_vfta(&adapter->hw, vid, 0, false);
1079 }
1080
1081 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1082 {
1083         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1084
1085         if (adapter->vlgrp) {
1086                 u16 vid;
1087                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1088                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1089                                 continue;
1090                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1091                 }
1092         }
1093 }
1094
1095 /**
1096  * ixgbe_set_multi - Multicast and Promiscuous mode set
1097  * @netdev: network interface device structure
1098  *
1099  * The set_multi entry point is called whenever the multicast address
1100  * list or the network interface flags are updated.  This routine is
1101  * responsible for configuring the hardware for proper multicast,
1102  * promiscuous mode, and all-multi behavior.
1103  **/
1104 static void ixgbe_set_multi(struct net_device *netdev)
1105 {
1106         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1107         struct ixgbe_hw *hw = &adapter->hw;
1108         struct dev_mc_list *mc_ptr;
1109         u8 *mta_list;
1110         u32 fctrl;
1111         int i;
1112
1113         /* Check for Promiscuous and All Multicast modes */
1114
1115         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1116
1117         if (netdev->flags & IFF_PROMISC) {
1118                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1119         } else if (netdev->flags & IFF_ALLMULTI) {
1120                 fctrl |= IXGBE_FCTRL_MPE;
1121                 fctrl &= ~IXGBE_FCTRL_UPE;
1122         } else {
1123                 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1124         }
1125
1126         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1127
1128         if (netdev->mc_count) {
1129                 mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
1130                 if (!mta_list)
1131                         return;
1132
1133                 /* Shared function expects packed array of only addresses. */
1134                 mc_ptr = netdev->mc_list;
1135
1136                 for (i = 0; i < netdev->mc_count; i++) {
1137                         if (!mc_ptr)
1138                                 break;
1139                         memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
1140                                ETH_ALEN);
1141                         mc_ptr = mc_ptr->next;
1142                 }
1143
1144                 ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
1145                 kfree(mta_list);
1146         } else {
1147                 ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
1148         }
1149
1150 }
1151
1152 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1153 {
1154         struct net_device *netdev = adapter->netdev;
1155         int i;
1156
1157         ixgbe_set_multi(netdev);
1158
1159         ixgbe_restore_vlan(adapter);
1160
1161         ixgbe_configure_tx(adapter);
1162         ixgbe_configure_rx(adapter);
1163         for (i = 0; i < adapter->num_rx_queues; i++)
1164                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1165                                            (adapter->rx_ring[i].count - 1));
1166 }
1167
1168 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1169 {
1170         struct net_device *netdev = adapter->netdev;
1171         int i;
1172         u32 gpie = 0;
1173         struct ixgbe_hw *hw = &adapter->hw;
1174         u32 txdctl, rxdctl, mhadd;
1175         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1176
1177         if (adapter->flags & (IXGBE_FLAG_MSIX_ENABLED |
1178                               IXGBE_FLAG_MSI_ENABLED)) {
1179                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1180                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1181                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1182                 } else {
1183                         /* MSI only */
1184                         gpie = (IXGBE_GPIE_EIAME |
1185                                 IXGBE_GPIE_PBA_SUPPORT);
1186                 }
1187                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_GPIE, gpie);
1188                 gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);
1189         }
1190
1191         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1192
1193         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1194                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1195                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1196
1197                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1198         }
1199
1200         for (i = 0; i < adapter->num_tx_queues; i++) {
1201                 txdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_TXDCTL(i));
1202                 txdctl |= IXGBE_TXDCTL_ENABLE;
1203                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_TXDCTL(i), txdctl);
1204         }
1205
1206         for (i = 0; i < adapter->num_rx_queues; i++) {
1207                 rxdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(i));
1208                 rxdctl |= IXGBE_RXDCTL_ENABLE;
1209                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(i), rxdctl);
1210         }
1211         /* enable all receives */
1212         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1213         rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1214         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1215
1216         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1217                 ixgbe_configure_msix(adapter);
1218         else
1219                 ixgbe_configure_msi_and_legacy(adapter);
1220
1221         clear_bit(__IXGBE_DOWN, &adapter->state);
1222         napi_enable(&adapter->napi);
1223         ixgbe_irq_enable(adapter);
1224
1225         /* bring the link up in the watchdog, this could race with our first
1226          * link up interrupt but shouldn't be a problem */
1227         mod_timer(&adapter->watchdog_timer, jiffies);
1228         return 0;
1229 }
1230
1231 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
1232 {
1233         WARN_ON(in_interrupt());
1234         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
1235                 msleep(1);
1236         ixgbe_down(adapter);
1237         ixgbe_up(adapter);
1238         clear_bit(__IXGBE_RESETTING, &adapter->state);
1239 }
1240
1241 int ixgbe_up(struct ixgbe_adapter *adapter)
1242 {
1243         /* hardware has been reset, we need to reload some things */
1244         ixgbe_configure(adapter);
1245
1246         return ixgbe_up_complete(adapter);
1247 }
1248
1249 void ixgbe_reset(struct ixgbe_adapter *adapter)
1250 {
1251         if (ixgbe_init_hw(&adapter->hw))
1252                 DPRINTK(PROBE, ERR, "Hardware Error\n");
1253
1254         /* reprogram the RAR[0] in case user changed it. */
1255         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
1256
1257 }
1258
1259 #ifdef CONFIG_PM
1260 static int ixgbe_resume(struct pci_dev *pdev)
1261 {
1262         struct net_device *netdev = pci_get_drvdata(pdev);
1263         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1264         u32 err, num_rx_queues = adapter->num_rx_queues;
1265
1266         pci_set_power_state(pdev, PCI_D0);
1267         pci_restore_state(pdev);
1268         err = pci_enable_device(pdev);
1269         if (err) {
1270                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
1271                                 "suspend\n");
1272                 return err;
1273         }
1274         pci_set_master(pdev);
1275
1276         pci_enable_wake(pdev, PCI_D3hot, 0);
1277         pci_enable_wake(pdev, PCI_D3cold, 0);
1278
1279         if (netif_running(netdev)) {
1280                 err = ixgbe_request_irq(adapter, &num_rx_queues);
1281                 if (err)
1282                         return err;
1283         }
1284
1285         ixgbe_reset(adapter);
1286
1287         if (netif_running(netdev))
1288                 ixgbe_up(adapter);
1289
1290         netif_device_attach(netdev);
1291
1292         return 0;
1293 }
1294 #endif
1295
1296 /**
1297  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
1298  * @adapter: board private structure
1299  * @rx_ring: ring to free buffers from
1300  **/
1301 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
1302                                 struct ixgbe_ring *rx_ring)
1303 {
1304         struct pci_dev *pdev = adapter->pdev;
1305         unsigned long size;
1306         unsigned int i;
1307
1308         /* Free all the Rx ring sk_buffs */
1309
1310         for (i = 0; i < rx_ring->count; i++) {
1311                 struct ixgbe_rx_buffer *rx_buffer_info;
1312
1313                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1314                 if (rx_buffer_info->dma) {
1315                         pci_unmap_single(pdev, rx_buffer_info->dma,
1316                                          adapter->rx_buf_len,
1317                                          PCI_DMA_FROMDEVICE);
1318                         rx_buffer_info->dma = 0;
1319                 }
1320                 if (rx_buffer_info->skb) {
1321                         dev_kfree_skb(rx_buffer_info->skb);
1322                         rx_buffer_info->skb = NULL;
1323                 }
1324                 if (!rx_buffer_info->page)
1325                         continue;
1326                 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
1327                                PCI_DMA_FROMDEVICE);
1328                 rx_buffer_info->page_dma = 0;
1329
1330                 put_page(rx_buffer_info->page);
1331                 rx_buffer_info->page = NULL;
1332         }
1333
1334         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
1335         memset(rx_ring->rx_buffer_info, 0, size);
1336
1337         /* Zero out the descriptor ring */
1338         memset(rx_ring->desc, 0, rx_ring->size);
1339
1340         rx_ring->next_to_clean = 0;
1341         rx_ring->next_to_use = 0;
1342
1343         writel(0, adapter->hw.hw_addr + rx_ring->head);
1344         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1345 }
1346
1347 /**
1348  * ixgbe_clean_tx_ring - Free Tx Buffers
1349  * @adapter: board private structure
1350  * @tx_ring: ring to be cleaned
1351  **/
1352 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
1353                                 struct ixgbe_ring *tx_ring)
1354 {
1355         struct ixgbe_tx_buffer *tx_buffer_info;
1356         unsigned long size;
1357         unsigned int i;
1358
1359         /* Free all the Tx ring sk_buffs */
1360
1361         for (i = 0; i < tx_ring->count; i++) {
1362                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1363                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1364         }
1365
1366         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
1367         memset(tx_ring->tx_buffer_info, 0, size);
1368
1369         /* Zero out the descriptor ring */
1370         memset(tx_ring->desc, 0, tx_ring->size);
1371
1372         tx_ring->next_to_use = 0;
1373         tx_ring->next_to_clean = 0;
1374
1375         writel(0, adapter->hw.hw_addr + tx_ring->head);
1376         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1377 }
1378
1379 /**
1380  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
1381  * @adapter: board private structure
1382  **/
1383 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
1384 {
1385         int i;
1386
1387         for (i = 0; i < adapter->num_tx_queues; i++)
1388                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1389 }
1390
1391 /**
1392  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
1393  * @adapter: board private structure
1394  **/
1395 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
1396 {
1397         int i;
1398
1399         for (i = 0; i < adapter->num_rx_queues; i++)
1400                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1401 }
1402
1403 void ixgbe_down(struct ixgbe_adapter *adapter)
1404 {
1405         struct net_device *netdev = adapter->netdev;
1406         u32 rxctrl;
1407
1408         /* signal that we are down to the interrupt handler */
1409         set_bit(__IXGBE_DOWN, &adapter->state);
1410
1411         /* disable receives */
1412         rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
1413         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
1414                         rxctrl & ~IXGBE_RXCTRL_RXEN);
1415
1416         netif_tx_disable(netdev);
1417
1418         /* disable transmits in the hardware */
1419
1420         /* flush both disables */
1421         IXGBE_WRITE_FLUSH(&adapter->hw);
1422         msleep(10);
1423
1424         napi_disable(&adapter->napi);
1425
1426         ixgbe_irq_disable(adapter);
1427
1428         del_timer_sync(&adapter->watchdog_timer);
1429
1430         netif_carrier_off(netdev);
1431         netif_stop_queue(netdev);
1432
1433         ixgbe_reset(adapter);
1434         ixgbe_clean_all_tx_rings(adapter);
1435         ixgbe_clean_all_rx_rings(adapter);
1436
1437 }
1438
1439 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
1440 {
1441         struct net_device *netdev = pci_get_drvdata(pdev);
1442         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1443 #ifdef CONFIG_PM
1444         int retval = 0;
1445 #endif
1446
1447         netif_device_detach(netdev);
1448
1449         if (netif_running(netdev)) {
1450                 ixgbe_down(adapter);
1451                 ixgbe_free_irq(adapter);
1452         }
1453
1454 #ifdef CONFIG_PM
1455         retval = pci_save_state(pdev);
1456         if (retval)
1457                 return retval;
1458 #endif
1459
1460         pci_enable_wake(pdev, PCI_D3hot, 0);
1461         pci_enable_wake(pdev, PCI_D3cold, 0);
1462
1463         pci_disable_device(pdev);
1464
1465         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1466
1467         return 0;
1468 }
1469
1470 static void ixgbe_shutdown(struct pci_dev *pdev)
1471 {
1472         ixgbe_suspend(pdev, PMSG_SUSPEND);
1473 }
1474
1475 /**
1476  * ixgbe_clean - NAPI Rx polling callback
1477  * @adapter: board private structure
1478  **/
1479 static int ixgbe_clean(struct napi_struct *napi, int budget)
1480 {
1481         struct ixgbe_adapter *adapter = container_of(napi,
1482                                         struct ixgbe_adapter, napi);
1483         struct net_device *netdev = adapter->netdev;
1484         int tx_cleaned = 0, work_done = 0;
1485
1486         /* In non-MSIX case, there is no multi-Tx/Rx queue */
1487         tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
1488         ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
1489                            budget);
1490
1491         if (tx_cleaned)
1492                 work_done = budget;
1493
1494         /* If budget not fully consumed, exit the polling mode */
1495         if (work_done < budget) {
1496                 netif_rx_complete(netdev, napi);
1497                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1498                         ixgbe_irq_enable(adapter);
1499         }
1500
1501         return work_done;
1502 }
1503
1504 /**
1505  * ixgbe_tx_timeout - Respond to a Tx Hang
1506  * @netdev: network interface device structure
1507  **/
1508 static void ixgbe_tx_timeout(struct net_device *netdev)
1509 {
1510         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1511
1512         /* Do the reset outside of interrupt context */
1513         schedule_work(&adapter->reset_task);
1514 }
1515
1516 static void ixgbe_reset_task(struct work_struct *work)
1517 {
1518         struct ixgbe_adapter *adapter;
1519         adapter = container_of(work, struct ixgbe_adapter, reset_task);
1520
1521         adapter->tx_timeout_count++;
1522
1523         ixgbe_reinit_locked(adapter);
1524 }
1525
1526 /**
1527  * ixgbe_alloc_queues - Allocate memory for all rings
1528  * @adapter: board private structure to initialize
1529  *
1530  * We allocate one ring per queue at run-time since we don't know the
1531  * number of queues at compile-time.  The polling_netdev array is
1532  * intended for Multiqueue, but should work fine with a single queue.
1533  **/
1534 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
1535 {
1536         int i;
1537
1538         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1539                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1540         if (!adapter->tx_ring)
1541                 return -ENOMEM;
1542
1543         for (i = 0; i < adapter->num_tx_queues; i++)
1544                 adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;
1545
1546         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1547                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1548         if (!adapter->rx_ring) {
1549                 kfree(adapter->tx_ring);
1550                 return -ENOMEM;
1551         }
1552
1553         for (i = 0; i < adapter->num_rx_queues; i++) {
1554                 adapter->rx_ring[i].adapter = adapter;
1555                 adapter->rx_ring[i].itr_register = IXGBE_EITR(i);
1556                 adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
1557         }
1558
1559         return 0;
1560 }
1561
1562 /**
1563  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
1564  * @adapter: board private structure to initialize
1565  *
1566  * ixgbe_sw_init initializes the Adapter private data structure.
1567  * Fields are initialized based on PCI device information and
1568  * OS network device settings (MTU size).
1569  **/
1570 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
1571 {
1572         struct ixgbe_hw *hw = &adapter->hw;
1573         struct pci_dev *pdev = adapter->pdev;
1574
1575         /* default flow control settings */
1576         hw->fc.original_type = ixgbe_fc_full;
1577         hw->fc.type = ixgbe_fc_full;
1578
1579         hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
1580         if (hw->mac.ops.reset(hw)) {
1581                 dev_err(&pdev->dev, "HW Init failed\n");
1582                 return -EIO;
1583         }
1584         if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true,
1585                                          false)) {
1586                 dev_err(&pdev->dev, "Link Speed setup failed\n");
1587                 return -EIO;
1588         }
1589
1590         /* initialize eeprom parameters */
1591         if (ixgbe_init_eeprom(hw)) {
1592                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
1593                 return -EIO;
1594         }
1595
1596         /* Set the default values */
1597         adapter->num_rx_queues = IXGBE_DEFAULT_RXQ;
1598         adapter->num_tx_queues = 1;
1599         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
1600
1601         if (ixgbe_alloc_queues(adapter)) {
1602                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1603                 return -ENOMEM;
1604         }
1605
1606         set_bit(__IXGBE_DOWN, &adapter->state);
1607
1608         return 0;
1609 }
1610
1611 /**
1612  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
1613  * @adapter: board private structure
1614  * @txdr:    tx descriptor ring (for a specific queue) to setup
1615  *
1616  * Return 0 on success, negative on failure
1617  **/
1618 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
1619                              struct ixgbe_ring *txdr)
1620 {
1621         struct pci_dev *pdev = adapter->pdev;
1622         int size;
1623
1624         size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
1625         txdr->tx_buffer_info = vmalloc(size);
1626         if (!txdr->tx_buffer_info) {
1627                 DPRINTK(PROBE, ERR,
1628                 "Unable to allocate memory for the transmit descriptor ring\n");
1629                 return -ENOMEM;
1630         }
1631         memset(txdr->tx_buffer_info, 0, size);
1632
1633         /* round up to nearest 4K */
1634         txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
1635         txdr->size = ALIGN(txdr->size, 4096);
1636
1637         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1638         if (!txdr->desc) {
1639                 vfree(txdr->tx_buffer_info);
1640                 DPRINTK(PROBE, ERR,
1641                         "Memory allocation failed for the tx desc ring\n");
1642                 return -ENOMEM;
1643         }
1644
1645         txdr->adapter = adapter;
1646         txdr->next_to_use = 0;
1647         txdr->next_to_clean = 0;
1648         txdr->work_limit = txdr->count;
1649         spin_lock_init(&txdr->tx_lock);
1650
1651         return 0;
1652 }
1653
1654 /**
1655  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
1656  * @adapter: board private structure
1657  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1658  *
1659  * Returns 0 on success, negative on failure
1660  **/
1661 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
1662                              struct ixgbe_ring *rxdr)
1663 {
1664         struct pci_dev *pdev = adapter->pdev;
1665         int size, desc_len;
1666
1667         size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
1668         rxdr->rx_buffer_info = vmalloc(size);
1669         if (!rxdr->rx_buffer_info) {
1670                 DPRINTK(PROBE, ERR,
1671                         "vmalloc allocation failed for the rx desc ring\n");
1672                 return -ENOMEM;
1673         }
1674         memset(rxdr->rx_buffer_info, 0, size);
1675
1676         desc_len = sizeof(union ixgbe_adv_rx_desc);
1677
1678         /* Round up to nearest 4K */
1679         rxdr->size = rxdr->count * desc_len;
1680         rxdr->size = ALIGN(rxdr->size, 4096);
1681
1682         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1683
1684         if (!rxdr->desc) {
1685                 DPRINTK(PROBE, ERR,
1686                         "Memory allocation failed for the rx desc ring\n");
1687                 vfree(rxdr->rx_buffer_info);
1688                 return -ENOMEM;
1689         }
1690
1691         rxdr->next_to_clean = 0;
1692         rxdr->next_to_use = 0;
1693         rxdr->adapter = adapter;
1694
1695         return 0;
1696 }
1697
1698 /**
1699  * ixgbe_free_tx_resources - Free Tx Resources per Queue
1700  * @adapter: board private structure
1701  * @tx_ring: Tx descriptor ring for a specific queue
1702  *
1703  * Free all transmit software resources
1704  **/
1705 static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
1706                                     struct ixgbe_ring *tx_ring)
1707 {
1708         struct pci_dev *pdev = adapter->pdev;
1709
1710         ixgbe_clean_tx_ring(adapter, tx_ring);
1711
1712         vfree(tx_ring->tx_buffer_info);
1713         tx_ring->tx_buffer_info = NULL;
1714
1715         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1716
1717         tx_ring->desc = NULL;
1718 }
1719
1720 /**
1721  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
1722  * @adapter: board private structure
1723  *
1724  * Free all transmit software resources
1725  **/
1726 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
1727 {
1728         int i;
1729
1730         for (i = 0; i < adapter->num_tx_queues; i++)
1731                 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
1732 }
1733
1734 /**
1735  * ixgbe_free_rx_resources - Free Rx Resources
1736  * @adapter: board private structure
1737  * @rx_ring: ring to clean the resources from
1738  *
1739  * Free all receive software resources
1740  **/
1741 static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
1742                                     struct ixgbe_ring *rx_ring)
1743 {
1744         struct pci_dev *pdev = adapter->pdev;
1745
1746         ixgbe_clean_rx_ring(adapter, rx_ring);
1747
1748         vfree(rx_ring->rx_buffer_info);
1749         rx_ring->rx_buffer_info = NULL;
1750
1751         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1752
1753         rx_ring->desc = NULL;
1754 }
1755
1756 /**
1757  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
1758  * @adapter: board private structure
1759  *
1760  * Free all receive software resources
1761  **/
1762 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
1763 {
1764         int i;
1765
1766         for (i = 0; i < adapter->num_rx_queues; i++)
1767                 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
1768 }
1769
1770 /**
1771  * ixgbe_setup_all_tx_resources - wrapper to allocate Tx resources
1772  *                                (Descriptors) for all queues
1773  * @adapter: board private structure
1774  *
1775  * If this function returns with an error, then it's possible one or
1776  * more of the rings is populated (while the rest are not).  It is the
1777  * callers duty to clean those orphaned rings.
1778  *
1779  * Return 0 on success, negative on failure
1780  **/
1781 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
1782 {
1783         int i, err = 0;
1784
1785         for (i = 0; i < adapter->num_tx_queues; i++) {
1786                 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1787                 if (err) {
1788                         DPRINTK(PROBE, ERR,
1789                                 "Allocation for Tx Queue %u failed\n", i);
1790                         break;
1791                 }
1792         }
1793
1794         return err;
1795 }
1796
1797 /**
1798  * ixgbe_setup_all_rx_resources - wrapper to allocate Rx resources
1799  *                                (Descriptors) for all queues
1800  * @adapter: board private structure
1801  *
1802  * If this function returns with an error, then it's possible one or
1803  * more of the rings is populated (while the rest are not).  It is the
1804  * callers duty to clean those orphaned rings.
1805  *
1806  * Return 0 on success, negative on failure
1807  **/
1808
1809 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
1810 {
1811         int i, err = 0;
1812
1813         for (i = 0; i < adapter->num_rx_queues; i++) {
1814                 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1815                 if (err) {
1816                         DPRINTK(PROBE, ERR,
1817                                 "Allocation for Rx Queue %u failed\n", i);
1818                         break;
1819                 }
1820         }
1821
1822         return err;
1823 }
1824
1825 /**
1826  * ixgbe_change_mtu - Change the Maximum Transfer Unit
1827  * @netdev: network interface device structure
1828  * @new_mtu: new value for maximum frame size
1829  *
1830  * Returns 0 on success, negative on failure
1831  **/
1832 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
1833 {
1834         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1835         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1836
1837         if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
1838             (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
1839                 return -EINVAL;
1840
1841         netdev->mtu = new_mtu;
1842
1843         if (netif_running(netdev))
1844                 ixgbe_reinit_locked(adapter);
1845
1846         return 0;
1847 }
1848
1849 /**
1850  * ixgbe_open - Called when a network interface is made active
1851  * @netdev: network interface device structure
1852  *
1853  * Returns 0 on success, negative value on failure
1854  *
1855  * The open entry point is called when a network interface is made
1856  * active by the system (IFF_UP).  At this point all resources needed
1857  * for transmit and receive operations are allocated, the interrupt
1858  * handler is registered with the OS, the watchdog timer is started,
1859  * and the stack is notified that the interface is ready.
1860  **/
1861 static int ixgbe_open(struct net_device *netdev)
1862 {
1863         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1864         int err;
1865         u32 ctrl_ext;
1866         u32 num_rx_queues = adapter->num_rx_queues;
1867
1868         /* Let firmware know the driver has taken over */
1869         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
1870         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
1871                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
1872
1873 try_intr_reinit:
1874         /* allocate transmit descriptors */
1875         err = ixgbe_setup_all_tx_resources(adapter);
1876         if (err)
1877                 goto err_setup_tx;
1878
1879         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1880                 num_rx_queues = 1;
1881                 adapter->num_rx_queues = num_rx_queues;
1882         }
1883
1884         /* allocate receive descriptors */
1885         err = ixgbe_setup_all_rx_resources(adapter);
1886         if (err)
1887                 goto err_setup_rx;
1888
1889         ixgbe_configure(adapter);
1890
1891         err = ixgbe_request_irq(adapter, &num_rx_queues);
1892         if (err)
1893                 goto err_req_irq;
1894
1895         /* ixgbe_request might have reduced num_rx_queues */
1896         if (num_rx_queues < adapter->num_rx_queues) {
1897                 /* We didn't get MSI-X, so we need to release everything,
1898                  * set our Rx queue count to num_rx_queues, and redo the
1899                  * whole init process.
1900                  */
1901                 ixgbe_free_irq(adapter);
1902                 if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1903                         pci_disable_msi(adapter->pdev);
1904                         adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
1905                 }
1906                 ixgbe_free_all_rx_resources(adapter);
1907                 ixgbe_free_all_tx_resources(adapter);
1908                 adapter->num_rx_queues = num_rx_queues;
1909
1910                 /* Reset the hardware, and start over. */
1911                 ixgbe_reset(adapter);
1912
1913                 goto try_intr_reinit;
1914         }
1915
1916         err = ixgbe_up_complete(adapter);
1917         if (err)
1918                 goto err_up;
1919
1920         return 0;
1921
1922 err_up:
1923         ixgbe_free_irq(adapter);
1924 err_req_irq:
1925         ixgbe_free_all_rx_resources(adapter);
1926 err_setup_rx:
1927         ixgbe_free_all_tx_resources(adapter);
1928 err_setup_tx:
1929         ixgbe_reset(adapter);
1930
1931         return err;
1932 }
1933
1934 /**
1935  * ixgbe_close - Disables a network interface
1936  * @netdev: network interface device structure
1937  *
1938  * Returns 0, this is not allowed to fail
1939  *
1940  * The close entry point is called when an interface is de-activated
1941  * by the OS.  The hardware is still under the drivers control, but
1942  * needs to be disabled.  A global MAC reset is issued to stop the
1943  * hardware, and all transmit and receive resources are freed.
1944  **/
1945 static int ixgbe_close(struct net_device *netdev)
1946 {
1947         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1948         u32 ctrl_ext;
1949
1950         ixgbe_down(adapter);
1951         ixgbe_free_irq(adapter);
1952
1953         ixgbe_free_all_tx_resources(adapter);
1954         ixgbe_free_all_rx_resources(adapter);
1955
1956         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
1957         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
1958                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
1959
1960         return 0;
1961 }
1962
1963 /**
1964  * ixgbe_update_stats - Update the board statistics counters.
1965  * @adapter: board private structure
1966  **/
1967 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
1968 {
1969         struct ixgbe_hw *hw = &adapter->hw;
1970         u64 good_rx, missed_rx, bprc;
1971
1972         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
1973         good_rx = IXGBE_READ_REG(hw, IXGBE_GPRC);
1974         missed_rx = IXGBE_READ_REG(hw, IXGBE_MPC(0));
1975         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(1));
1976         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(2));
1977         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(3));
1978         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(4));
1979         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(5));
1980         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(6));
1981         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(7));
1982         adapter->stats.gprc += (good_rx - missed_rx);
1983
1984         adapter->stats.mpc[0] += missed_rx;
1985         adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
1986         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
1987         adapter->stats.bprc += bprc;
1988         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
1989         adapter->stats.mprc -= bprc;
1990         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
1991         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
1992         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
1993         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
1994         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
1995         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
1996         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
1997
1998         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
1999         adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
2000         adapter->stats.lxontxc += IXGBE_READ_REG(hw, IXGBE_LXONTXC);
2001         adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
2002         adapter->stats.lxofftxc += IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
2003         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2004         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
2005         adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
2006         adapter->stats.rnbc[0] += IXGBE_READ_REG(hw, IXGBE_RNBC(0));
2007         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2008         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
2009         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
2010         adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
2011         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
2012         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
2013         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
2014         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
2015         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
2016         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
2017         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
2018         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
2019         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
2020
2021         /* Fill out the OS statistics structure */
2022         adapter->net_stats.rx_packets = adapter->stats.gprc;
2023         adapter->net_stats.tx_packets = adapter->stats.gptc;
2024         adapter->net_stats.rx_bytes = adapter->stats.gorc;
2025         adapter->net_stats.tx_bytes = adapter->stats.gotc;
2026         adapter->net_stats.multicast = adapter->stats.mprc;
2027
2028         /* Rx Errors */
2029         adapter->net_stats.rx_errors = adapter->stats.crcerrs +
2030                                                 adapter->stats.rlec;
2031         adapter->net_stats.rx_dropped = 0;
2032         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2033         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2034         adapter->net_stats.rx_missed_errors = adapter->stats.mpc[0];
2035
2036 }
2037
2038 /**
2039  * ixgbe_watchdog - Timer Call-back
2040  * @data: pointer to adapter cast into an unsigned long
2041  **/
2042 static void ixgbe_watchdog(unsigned long data)
2043 {
2044         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
2045         struct net_device *netdev = adapter->netdev;
2046         bool link_up;
2047         u32 link_speed = 0;
2048
2049         adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up);
2050
2051         if (link_up) {
2052                 if (!netif_carrier_ok(netdev)) {
2053                         u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2054                         u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS);
2055 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
2056 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
2057                         DPRINTK(LINK, INFO, "NIC Link is Up %s, "
2058                                 "Flow Control: %s\n",
2059                                 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
2060                                  "10 Gbps" :
2061                                  (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
2062                                   "1 Gpbs" : "unknown speed")),
2063                                 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
2064                                  (FLOW_RX ? "RX" :
2065                                  (FLOW_TX ? "TX" : "None"))));
2066
2067                         netif_carrier_on(netdev);
2068                         netif_wake_queue(netdev);
2069                 } else {
2070                         /* Force detection of hung controller */
2071                         adapter->detect_tx_hung = true;
2072                 }
2073         } else {
2074                 if (netif_carrier_ok(netdev)) {
2075                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2076                         netif_carrier_off(netdev);
2077                         netif_stop_queue(netdev);
2078                 }
2079         }
2080
2081         ixgbe_update_stats(adapter);
2082
2083         /* Reset the timer */
2084         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2085                 mod_timer(&adapter->watchdog_timer,
2086                           round_jiffies(jiffies + 2 * HZ));
2087 }
2088
2089 #define IXGBE_MAX_TXD_PWR       14
2090 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
2091
2092 /* Tx Descriptors needed, worst case */
2093 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
2094                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
2095 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
2096         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)   /* for context */
2097
2098 static int ixgbe_tso(struct ixgbe_adapter *adapter,
2099                          struct ixgbe_ring *tx_ring, struct sk_buff *skb,
2100                          u32 tx_flags, u8 *hdr_len)
2101 {
2102         struct ixgbe_adv_tx_context_desc *context_desc;
2103         unsigned int i;
2104         int err;
2105         struct ixgbe_tx_buffer *tx_buffer_info;
2106         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2107         u32 mss_l4len_idx = 0, l4len;
2108         *hdr_len = 0;
2109
2110         if (skb_is_gso(skb)) {
2111                 if (skb_header_cloned(skb)) {
2112                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2113                         if (err)
2114                                 return err;
2115                 }
2116                 l4len = tcp_hdrlen(skb);
2117                 *hdr_len += l4len;
2118
2119                 if (skb->protocol == htons(ETH_P_IP)) {
2120                         struct iphdr *iph = ip_hdr(skb);
2121                         iph->tot_len = 0;
2122                         iph->check = 0;
2123                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2124                                                                  iph->daddr, 0,
2125                                                                  IPPROTO_TCP,
2126                                                                  0);
2127                         adapter->hw_tso_ctxt++;
2128                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2129                         ipv6_hdr(skb)->payload_len = 0;
2130                         tcp_hdr(skb)->check =
2131                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2132                                              &ipv6_hdr(skb)->daddr,
2133                                              0, IPPROTO_TCP, 0);
2134                         adapter->hw_tso6_ctxt++;
2135                 }
2136
2137                 i = tx_ring->next_to_use;
2138
2139                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2140                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2141
2142                 /* VLAN MACLEN IPLEN */
2143                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2144                         vlan_macip_lens |=
2145                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2146                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2147                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2148                 *hdr_len += skb_network_offset(skb);
2149                 vlan_macip_lens |=
2150                     (skb_transport_header(skb) - skb_network_header(skb));
2151                 *hdr_len +=
2152                     (skb_transport_header(skb) - skb_network_header(skb));
2153                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2154                 context_desc->seqnum_seed = 0;
2155
2156                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2157                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2158                                     IXGBE_ADVTXD_DTYP_CTXT);
2159
2160                 if (skb->protocol == htons(ETH_P_IP))
2161                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2162                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2163                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2164
2165                 /* MSS L4LEN IDX */
2166                 mss_l4len_idx |=
2167                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2168                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2169                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2170
2171                 tx_buffer_info->time_stamp = jiffies;
2172                 tx_buffer_info->next_to_watch = i;
2173
2174                 i++;
2175                 if (i == tx_ring->count)
2176                         i = 0;
2177                 tx_ring->next_to_use = i;
2178
2179                 return true;
2180         }
2181         return false;
2182 }
2183
2184 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
2185                                    struct ixgbe_ring *tx_ring,
2186                                    struct sk_buff *skb, u32 tx_flags)
2187 {
2188         struct ixgbe_adv_tx_context_desc *context_desc;
2189         unsigned int i;
2190         struct ixgbe_tx_buffer *tx_buffer_info;
2191         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2192
2193         if (skb->ip_summed == CHECKSUM_PARTIAL ||
2194             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2195                 i = tx_ring->next_to_use;
2196                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2197                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2198
2199                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2200                         vlan_macip_lens |=
2201                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2202                 vlan_macip_lens |= (skb_network_offset(skb) <<
2203                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2204                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2205                         vlan_macip_lens |= (skb_transport_header(skb) -
2206                                             skb_network_header(skb));
2207
2208                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2209                 context_desc->seqnum_seed = 0;
2210
2211                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2212                                     IXGBE_ADVTXD_DTYP_CTXT);
2213
2214                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2215                         if (skb->protocol == htons(ETH_P_IP))
2216                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2217
2218                         if (skb->sk->sk_protocol == IPPROTO_TCP)
2219                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2220                 }
2221
2222                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2223                 context_desc->mss_l4len_idx = 0;
2224
2225                 tx_buffer_info->time_stamp = jiffies;
2226                 tx_buffer_info->next_to_watch = i;
2227                 adapter->hw_csum_tx_good++;
2228                 i++;
2229                 if (i == tx_ring->count)
2230                         i = 0;
2231                 tx_ring->next_to_use = i;
2232
2233                 return true;
2234         }
2235         return false;
2236 }
2237
2238 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
2239                         struct ixgbe_ring *tx_ring,
2240                         struct sk_buff *skb, unsigned int first)
2241 {
2242         struct ixgbe_tx_buffer *tx_buffer_info;
2243         unsigned int len = skb->len;
2244         unsigned int offset = 0, size, count = 0, i;
2245         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2246         unsigned int f;
2247
2248         len -= skb->data_len;
2249
2250         i = tx_ring->next_to_use;
2251
2252         while (len) {
2253                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2254                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2255
2256                 tx_buffer_info->length = size;
2257                 tx_buffer_info->dma = pci_map_single(adapter->pdev,
2258                                                   skb->data + offset,
2259                                                   size, PCI_DMA_TODEVICE);
2260                 tx_buffer_info->time_stamp = jiffies;
2261                 tx_buffer_info->next_to_watch = i;
2262
2263                 len -= size;
2264                 offset += size;
2265                 count++;
2266                 i++;
2267                 if (i == tx_ring->count)
2268                         i = 0;
2269         }
2270
2271         for (f = 0; f < nr_frags; f++) {
2272                 struct skb_frag_struct *frag;
2273
2274                 frag = &skb_shinfo(skb)->frags[f];
2275                 len = frag->size;
2276                 offset = frag->page_offset;
2277
2278                 while (len) {
2279                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2280                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2281
2282                         tx_buffer_info->length = size;
2283                         tx_buffer_info->dma = pci_map_page(adapter->pdev,
2284                                                         frag->page,
2285                                                         offset,
2286                                                         size, PCI_DMA_TODEVICE);
2287                         tx_buffer_info->time_stamp = jiffies;
2288                         tx_buffer_info->next_to_watch = i;
2289
2290                         len -= size;
2291                         offset += size;
2292                         count++;
2293                         i++;
2294                         if (i == tx_ring->count)
2295                                 i = 0;
2296                 }
2297         }
2298         if (i == 0)
2299                 i = tx_ring->count - 1;
2300         else
2301                 i = i - 1;
2302         tx_ring->tx_buffer_info[i].skb = skb;
2303         tx_ring->tx_buffer_info[first].next_to_watch = i;
2304
2305         return count;
2306 }
2307
2308 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
2309                                struct ixgbe_ring *tx_ring,
2310                                int tx_flags, int count, u32 paylen, u8 hdr_len)
2311 {
2312         union ixgbe_adv_tx_desc *tx_desc = NULL;
2313         struct ixgbe_tx_buffer *tx_buffer_info;
2314         u32 olinfo_status = 0, cmd_type_len = 0;
2315         unsigned int i;
2316         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2317
2318         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2319
2320         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2321
2322         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2323                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2324
2325         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2326                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2327
2328                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2329                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2330
2331                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2332                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
2333                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2334
2335         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2336                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2337                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2338
2339         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2340
2341         i = tx_ring->next_to_use;
2342         while (count--) {
2343                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2344                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
2345                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2346                 tx_desc->read.cmd_type_len =
2347                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2348                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2349
2350                 i++;
2351                 if (i == tx_ring->count)
2352                         i = 0;
2353         }
2354
2355         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2356
2357         /*
2358          * Force memory writes to complete before letting h/w
2359          * know there are new descriptors to fetch.  (Only
2360          * applicable for weak-ordered memory model archs,
2361          * such as IA-64).
2362          */
2363         wmb();
2364
2365         tx_ring->next_to_use = i;
2366         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2367 }
2368
2369 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2370 {
2371         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2372         struct ixgbe_ring *tx_ring;
2373         unsigned int len = skb->len;
2374         unsigned int first;
2375         unsigned int tx_flags = 0;
2376         unsigned long flags = 0;
2377         u8 hdr_len;
2378         int tso;
2379         unsigned int mss = 0;
2380         int count = 0;
2381         unsigned int f;
2382         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2383         len -= skb->data_len;
2384
2385         tx_ring = adapter->tx_ring;
2386
2387         if (skb->len <= 0) {
2388                 dev_kfree_skb(skb);
2389                 return NETDEV_TX_OK;
2390         }
2391         mss = skb_shinfo(skb)->gso_size;
2392
2393         if (mss)
2394                 count++;
2395         else if (skb->ip_summed == CHECKSUM_PARTIAL)
2396                 count++;
2397
2398         count += TXD_USE_COUNT(len);
2399         for (f = 0; f < nr_frags; f++)
2400                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
2401
2402         spin_lock_irqsave(&tx_ring->tx_lock, flags);
2403         if (IXGBE_DESC_UNUSED(tx_ring) < (count + 2)) {
2404                 adapter->tx_busy++;
2405                 netif_stop_queue(netdev);
2406                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2407                 return NETDEV_TX_BUSY;
2408         }
2409         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2410         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2411                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
2412                 tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
2413         }
2414
2415         if (skb->protocol == htons(ETH_P_IP))
2416                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
2417         first = tx_ring->next_to_use;
2418         tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
2419         if (tso < 0) {
2420                 dev_kfree_skb_any(skb);
2421                 return NETDEV_TX_OK;
2422         }
2423
2424         if (tso)
2425                 tx_flags |= IXGBE_TX_FLAGS_TSO;
2426         else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2427                  (skb->ip_summed == CHECKSUM_PARTIAL))
2428                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
2429
2430         ixgbe_tx_queue(adapter, tx_ring, tx_flags,
2431                            ixgbe_tx_map(adapter, tx_ring, skb, first),
2432                            skb->len, hdr_len);
2433
2434         netdev->trans_start = jiffies;
2435
2436         spin_lock_irqsave(&tx_ring->tx_lock, flags);
2437         /* Make sure there is space in the ring for the next send. */
2438         if (IXGBE_DESC_UNUSED(tx_ring) < DESC_NEEDED)
2439                 netif_stop_queue(netdev);
2440         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2441
2442         return NETDEV_TX_OK;
2443 }
2444
2445 /**
2446  * ixgbe_get_stats - Get System Network Statistics
2447  * @netdev: network interface device structure
2448  *
2449  * Returns the address of the device statistics structure.
2450  * The statistics are actually updated from the timer callback.
2451  **/
2452 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
2453 {
2454         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2455
2456         /* only return the current stats */
2457         return &adapter->net_stats;
2458 }
2459
2460 /**
2461  * ixgbe_set_mac - Change the Ethernet Address of the NIC
2462  * @netdev: network interface device structure
2463  * @p: pointer to an address structure
2464  *
2465  * Returns 0 on success, negative on failure
2466  **/
2467 static int ixgbe_set_mac(struct net_device *netdev, void *p)
2468 {
2469         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2470         struct sockaddr *addr = p;
2471
2472         if (!is_valid_ether_addr(addr->sa_data))
2473                 return -EADDRNOTAVAIL;
2474
2475         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2476         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2477
2478         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
2479
2480         return 0;
2481 }
2482
2483 #ifdef CONFIG_NET_POLL_CONTROLLER
2484 /*
2485  * Polling 'interrupt' - used by things like netconsole to send skbs
2486  * without having to re-enable interrupts. It's not called while
2487  * the interrupt routine is executing.
2488  */
2489 static void ixgbe_netpoll(struct net_device *netdev)
2490 {
2491         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2492
2493         disable_irq(adapter->pdev->irq);
2494         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
2495         ixgbe_intr(adapter->pdev->irq, netdev);
2496         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
2497         enable_irq(adapter->pdev->irq);
2498 }
2499 #endif
2500
2501 /**
2502  * ixgbe_probe - Device Initialization Routine
2503  * @pdev: PCI device information struct
2504  * @ent: entry in ixgbe_pci_tbl
2505  *
2506  * Returns 0 on success, negative on failure
2507  *
2508  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
2509  * The OS initialization, configuring of the adapter private structure,
2510  * and a hardware reset occur.
2511  **/
2512 static int __devinit ixgbe_probe(struct pci_dev *pdev,
2513                                  const struct pci_device_id *ent)
2514 {
2515         struct net_device *netdev;
2516         struct ixgbe_adapter *adapter = NULL;
2517         struct ixgbe_hw *hw;
2518         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
2519         unsigned long mmio_start, mmio_len;
2520         static int cards_found;
2521         int i, err, pci_using_dac;
2522         u16 link_status, link_speed, link_width;
2523         u32 part_num;
2524
2525         err = pci_enable_device(pdev);
2526         if (err)
2527                 return err;
2528
2529         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
2530             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
2531                 pci_using_dac = 1;
2532         } else {
2533                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2534                 if (err) {
2535                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2536                         if (err) {
2537                                 dev_err(&pdev->dev, "No usable DMA "
2538                                         "configuration, aborting\n");
2539                                 goto err_dma;
2540                         }
2541                 }
2542                 pci_using_dac = 0;
2543         }
2544
2545         err = pci_request_regions(pdev, ixgbe_driver_name);
2546         if (err) {
2547                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
2548                 goto err_pci_reg;
2549         }
2550
2551         pci_set_master(pdev);
2552
2553         netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
2554         if (!netdev) {
2555                 err = -ENOMEM;
2556                 goto err_alloc_etherdev;
2557         }
2558
2559         SET_NETDEV_DEV(netdev, &pdev->dev);
2560
2561         pci_set_drvdata(pdev, netdev);
2562         adapter = netdev_priv(netdev);
2563
2564         adapter->netdev = netdev;
2565         adapter->pdev = pdev;
2566         hw = &adapter->hw;
2567         hw->back = adapter;
2568         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2569
2570         mmio_start = pci_resource_start(pdev, 0);
2571         mmio_len = pci_resource_len(pdev, 0);
2572
2573         hw->hw_addr = ioremap(mmio_start, mmio_len);
2574         if (!hw->hw_addr) {
2575                 err = -EIO;
2576                 goto err_ioremap;
2577         }
2578
2579         for (i = 1; i <= 5; i++) {
2580                 if (pci_resource_len(pdev, i) == 0)
2581                         continue;
2582         }
2583
2584         netdev->open = &ixgbe_open;
2585         netdev->stop = &ixgbe_close;
2586         netdev->hard_start_xmit = &ixgbe_xmit_frame;
2587         netdev->get_stats = &ixgbe_get_stats;
2588         netdev->set_multicast_list = &ixgbe_set_multi;
2589         netdev->set_mac_address = &ixgbe_set_mac;
2590         netdev->change_mtu = &ixgbe_change_mtu;
2591         ixgbe_set_ethtool_ops(netdev);
2592         netdev->tx_timeout = &ixgbe_tx_timeout;
2593         netdev->watchdog_timeo = 5 * HZ;
2594         netif_napi_add(netdev, &adapter->napi, ixgbe_clean, 64);
2595         netdev->vlan_rx_register = ixgbe_vlan_rx_register;
2596         netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
2597         netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
2598 #ifdef CONFIG_NET_POLL_CONTROLLER
2599         netdev->poll_controller = ixgbe_netpoll;
2600 #endif
2601         strcpy(netdev->name, pci_name(pdev));
2602
2603         netdev->mem_start = mmio_start;
2604         netdev->mem_end = mmio_start + mmio_len;
2605
2606         adapter->bd_number = cards_found;
2607
2608         /* PCI config space info */
2609         hw->vendor_id = pdev->vendor;
2610         hw->device_id = pdev->device;
2611         hw->revision_id = pdev->revision;
2612         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2613         hw->subsystem_device_id = pdev->subsystem_device;
2614
2615         /* Setup hw api */
2616         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
2617
2618         err = ii->get_invariants(hw);
2619         if (err)
2620                 goto err_hw_init;
2621
2622         /* setup the private structure */
2623         err = ixgbe_sw_init(adapter);
2624         if (err)
2625                 goto err_sw_init;
2626
2627         netdev->features = NETIF_F_SG |
2628                            NETIF_F_HW_CSUM |
2629                            NETIF_F_HW_VLAN_TX |
2630                            NETIF_F_HW_VLAN_RX |
2631                            NETIF_F_HW_VLAN_FILTER;
2632
2633         netdev->features |= NETIF_F_TSO;
2634
2635         netdev->features |= NETIF_F_TSO6;
2636         if (pci_using_dac)
2637                 netdev->features |= NETIF_F_HIGHDMA;
2638
2639
2640         /* make sure the EEPROM is good */
2641         if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
2642                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
2643                 err = -EIO;
2644                 goto err_eeprom;
2645         }
2646
2647         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
2648         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
2649
2650         if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
2651                 err = -EIO;
2652                 goto err_eeprom;
2653         }
2654
2655         init_timer(&adapter->watchdog_timer);
2656         adapter->watchdog_timer.function = &ixgbe_watchdog;
2657         adapter->watchdog_timer.data = (unsigned long)adapter;
2658
2659         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
2660
2661         /* initialize default flow control settings */
2662         hw->fc.original_type = ixgbe_fc_full;
2663         hw->fc.type = ixgbe_fc_full;
2664         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2665         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2666         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2667
2668         /* Interrupt Throttle Rate */
2669         adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
2670         adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);
2671
2672         /* print bus type/speed/width info */
2673         pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
2674         link_speed = link_status & IXGBE_PCI_LINK_SPEED;
2675         link_width = link_status & IXGBE_PCI_LINK_WIDTH;
2676         dev_info(&pdev->dev, "(PCI Express:%s:%s) "
2677                  "%02x:%02x:%02x:%02x:%02x:%02x\n",
2678                 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
2679                  (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
2680                  "Unknown"),
2681                 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
2682                  (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
2683                  (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
2684                  (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
2685                  "Unknown"),
2686                 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
2687                 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
2688         ixgbe_read_part_num(hw, &part_num);
2689         dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
2690                  hw->mac.type, hw->phy.type,
2691                  (part_num >> 8), (part_num & 0xff));
2692
2693         /* reset the hardware with the new settings */
2694         ixgbe_start_hw(hw);
2695
2696         netif_carrier_off(netdev);
2697         netif_stop_queue(netdev);
2698
2699         strcpy(netdev->name, "eth%d");
2700         err = register_netdev(netdev);
2701         if (err)
2702                 goto err_register;
2703
2704
2705         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
2706         cards_found++;
2707         return 0;
2708
2709 err_register:
2710 err_hw_init:
2711 err_sw_init:
2712 err_eeprom:
2713         iounmap(hw->hw_addr);
2714 err_ioremap:
2715         free_netdev(netdev);
2716 err_alloc_etherdev:
2717         pci_release_regions(pdev);
2718 err_pci_reg:
2719 err_dma:
2720         pci_disable_device(pdev);
2721         return err;
2722 }
2723
2724 /**
2725  * ixgbe_remove - Device Removal Routine
2726  * @pdev: PCI device information struct
2727  *
2728  * ixgbe_remove is called by the PCI subsystem to alert the driver
2729  * that it should release a PCI device.  The could be caused by a
2730  * Hot-Plug event, or because the driver is going to be removed from
2731  * memory.
2732  **/
2733 static void __devexit ixgbe_remove(struct pci_dev *pdev)
2734 {
2735         struct net_device *netdev = pci_get_drvdata(pdev);
2736         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2737
2738         set_bit(__IXGBE_DOWN, &adapter->state);
2739         del_timer_sync(&adapter->watchdog_timer);
2740
2741         flush_scheduled_work();
2742
2743         unregister_netdev(netdev);
2744
2745         kfree(adapter->tx_ring);
2746         kfree(adapter->rx_ring);
2747
2748         iounmap(adapter->hw.hw_addr);
2749         pci_release_regions(pdev);
2750
2751         free_netdev(netdev);
2752
2753         pci_disable_device(pdev);
2754 }
2755
2756 /**
2757  * ixgbe_io_error_detected - called when PCI error is detected
2758  * @pdev: Pointer to PCI device
2759  * @state: The current pci connection state
2760  *
2761  * This function is called after a PCI bus error affecting
2762  * this device has been detected.
2763  */
2764 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
2765                                                 pci_channel_state_t state)
2766 {
2767         struct net_device *netdev = pci_get_drvdata(pdev);
2768         struct ixgbe_adapter *adapter = netdev->priv;
2769
2770         netif_device_detach(netdev);
2771
2772         if (netif_running(netdev))
2773                 ixgbe_down(adapter);
2774         pci_disable_device(pdev);
2775
2776         /* Request a slot slot reset. */
2777         return PCI_ERS_RESULT_NEED_RESET;
2778 }
2779
2780 /**
2781  * ixgbe_io_slot_reset - called after the pci bus has been reset.
2782  * @pdev: Pointer to PCI device
2783  *
2784  * Restart the card from scratch, as if from a cold-boot.
2785  */
2786 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
2787 {
2788         struct net_device *netdev = pci_get_drvdata(pdev);
2789         struct ixgbe_adapter *adapter = netdev->priv;
2790
2791         if (pci_enable_device(pdev)) {
2792                 DPRINTK(PROBE, ERR,
2793                         "Cannot re-enable PCI device after reset.\n");
2794                 return PCI_ERS_RESULT_DISCONNECT;
2795         }
2796         pci_set_master(pdev);
2797
2798         pci_enable_wake(pdev, PCI_D3hot, 0);
2799         pci_enable_wake(pdev, PCI_D3cold, 0);
2800
2801         ixgbe_reset(adapter);
2802
2803         return PCI_ERS_RESULT_RECOVERED;
2804 }
2805
2806 /**
2807  * ixgbe_io_resume - called when traffic can start flowing again.
2808  * @pdev: Pointer to PCI device
2809  *
2810  * This callback is called when the error recovery driver tells us that
2811  * its OK to resume normal operation.
2812  */
2813 static void ixgbe_io_resume(struct pci_dev *pdev)
2814 {
2815         struct net_device *netdev = pci_get_drvdata(pdev);
2816         struct ixgbe_adapter *adapter = netdev->priv;
2817
2818         if (netif_running(netdev)) {
2819                 if (ixgbe_up(adapter)) {
2820                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
2821                         return;
2822                 }
2823         }
2824
2825         netif_device_attach(netdev);
2826
2827 }
2828
2829 static struct pci_error_handlers ixgbe_err_handler = {
2830         .error_detected = ixgbe_io_error_detected,
2831         .slot_reset = ixgbe_io_slot_reset,
2832         .resume = ixgbe_io_resume,
2833 };
2834
2835 static struct pci_driver ixgbe_driver = {
2836         .name     = ixgbe_driver_name,
2837         .id_table = ixgbe_pci_tbl,
2838         .probe    = ixgbe_probe,
2839         .remove   = __devexit_p(ixgbe_remove),
2840 #ifdef CONFIG_PM
2841         .suspend  = ixgbe_suspend,
2842         .resume   = ixgbe_resume,
2843 #endif
2844         .shutdown = ixgbe_shutdown,
2845         .err_handler = &ixgbe_err_handler
2846 };
2847
2848 /**
2849  * ixgbe_init_module - Driver Registration Routine
2850  *
2851  * ixgbe_init_module is the first routine called when the driver is
2852  * loaded. All it does is register with the PCI subsystem.
2853  **/
2854 static int __init ixgbe_init_module(void)
2855 {
2856         int ret;
2857         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
2858                ixgbe_driver_string, ixgbe_driver_version);
2859
2860         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
2861
2862         ret = pci_register_driver(&ixgbe_driver);
2863         return ret;
2864 }
2865 module_init(ixgbe_init_module);
2866
2867 /**
2868  * ixgbe_exit_module - Driver Exit Cleanup Routine
2869  *
2870  * ixgbe_exit_module is called just before the driver is removed
2871  * from memory.
2872  **/
2873 static void __exit ixgbe_exit_module(void)
2874 {
2875         pci_unregister_driver(&ixgbe_driver);
2876 }
2877 module_exit(ixgbe_exit_module);
2878
2879 /* ixgbe_main.c */