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 char ixgbe_driver_string[] =
  49                         "Intel(R) 10 Gigabit PCI Express Network Driver";
  50
  51 #define DRV_VERSION "1.1.18"
  52 char ixgbe_driver_version[] = DRV_VERSION;
  53 static char ixgbe_copyright[] = "Copyright (c) 1999-2007 Intel Corporation.";
  54
  55 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  56         [board_82598AF]                 = &ixgbe_82598AF_info,
  57         [board_82598EB]                 = &ixgbe_82598EB_info,
  58         [board_82598AT]                 = &ixgbe_82598AT_info,
  59 };
  60
  61 /* ixgbe_pci_tbl - PCI Device ID Table
  62  *
  63  * Wildcard entries (PCI_ANY_ID) should come last
  64  * Last entry must be all 0s
  65  *
  66  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  67  *   Class, Class Mask, private data (not used) }
  68  */
  69 static struct pci_device_id ixgbe_pci_tbl[] = {
  70         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  71          board_82598AF },
  72         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  73          board_82598AF },
  74         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
  75          board_82598AT },
  76         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  77          board_82598EB },
  78
  79         /* required last entry */
  80         {0, }
  81 };
  82 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
  83
  84 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  85 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(DRV_VERSION);
  88
  89 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  90
  91
  92 #ifdef DEBUG
  93 /**
  94  * ixgbe_get_hw_dev_name - return device name string
  95  * used by hardware layer to print debugging information
  96  **/
  97 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
  98 {
  99         struct ixgbe_adapter *adapter = hw->back;
 100         struct net_device *netdev = adapter->netdev;
 101         return netdev->name;
 102 }
 103 #endif
 104
 105 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
 106                            u8 msix_vector)
 107 {
 108         u32 ivar, index;
 109
 110         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 111         index = (int_alloc_entry >> 2) & 0x1F;
 112         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
 113         ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
 114         ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
 115         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
 116 }
 117
 118 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 119                                              struct ixgbe_tx_buffer
 120                                              *tx_buffer_info)
 121 {
 122         if (tx_buffer_info->dma) {
 123                 pci_unmap_page(adapter->pdev,
 124                                tx_buffer_info->dma,
 125                                tx_buffer_info->length, PCI_DMA_TODEVICE);
 126                 tx_buffer_info->dma = 0;
 127         }
 128         if (tx_buffer_info->skb) {
 129                 dev_kfree_skb_any(tx_buffer_info->skb);
 130                 tx_buffer_info->skb = NULL;
 131         }
 132         /* tx_buffer_info must be completely set up in the transmit path */
 133 }
 134
 135 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 136                                        struct ixgbe_ring *tx_ring,
 137                                        unsigned int eop,
 138                                        union ixgbe_adv_tx_desc *eop_desc)
 139 {
 140         /* Detect a transmit hang in hardware, this serializes the
 141          * check with the clearing of time_stamp and movement of i */
 142         adapter->detect_tx_hung = false;
 143         if (tx_ring->tx_buffer_info[eop].dma &&
 144             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 145             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 146                 /* detected Tx unit hang */
 147                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 148                         "  TDH                  <%x>\n"
 149                         "  TDT                  <%x>\n"
 150                         "  next_to_use          <%x>\n"
 151                         "  next_to_clean        <%x>\n"
 152                         "tx_buffer_info[next_to_clean]\n"
 153                         "  time_stamp           <%lx>\n"
 154                         "  next_to_watch        <%x>\n"
 155                         "  jiffies              <%lx>\n"
 156                         "  next_to_watch.status <%x>\n",
 157                         readl(adapter->hw.hw_addr + tx_ring->head),
 158                         readl(adapter->hw.hw_addr + tx_ring->tail),
 159                         tx_ring->next_to_use,
 160                         tx_ring->next_to_clean,
 161                         tx_ring->tx_buffer_info[eop].time_stamp,
 162                         eop, jiffies, eop_desc->wb.status);
 163                 return true;
 164         }
 165
 166         return false;
 167 }
 168
 169 /**
 170  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 171  * @adapter: board private structure
 172  **/
 173 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 174                                     struct ixgbe_ring *tx_ring)
 175 {
 176         struct net_device *netdev = adapter->netdev;
 177         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 178         struct ixgbe_tx_buffer *tx_buffer_info;
 179         unsigned int i, eop;
 180         bool cleaned = false;
 181         int count = 0;
 182
 183         i = tx_ring->next_to_clean;
 184         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 185         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 186         while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
 187                 for (cleaned = false; !cleaned;) {
 188                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 189                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 190                         cleaned = (i == eop);
 191
 192                         tx_ring->stats.bytes += tx_buffer_info->length;
 193                         ixgbe_unmap_and_free_tx_resource(adapter,
 194                                                          tx_buffer_info);
 195                         tx_desc->wb.status = 0;
 196
 197                         i++;
 198                         if (i == tx_ring->count)
 199                                 i = 0;
 200                 }
 201
 202                 tx_ring->stats.packets++;
 203
 204                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 205                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 206
 207                 /* weight of a sort for tx, avoid endless transmit cleanup */
 208                 if (count++ >= tx_ring->work_limit)
 209                         break;
 210         }
 211
 212         tx_ring->next_to_clean = i;
 213
 214 #define TX_WAKE_THRESHOLD 32
 215         spin_lock(&tx_ring->tx_lock);
 216
 217         if (cleaned && netif_carrier_ok(netdev) &&
 218             (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD) &&
 219             !test_bit(__IXGBE_DOWN, &adapter->state))
 220                 netif_wake_queue(netdev);
 221
 222         spin_unlock(&tx_ring->tx_lock);
 223
 224         if (adapter->detect_tx_hung)
 225                 if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
 226                         netif_stop_queue(netdev);
 227
 228         if (count >= tx_ring->work_limit)
 229                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
 230
 231         return cleaned;
 232 }
 233
 234 /**
 235  * ixgbe_receive_skb - Send a completed packet up the stack
 236  * @adapter: board private structure
 237  * @skb: packet to send up
 238  * @is_vlan: packet has a VLAN tag
 239  * @tag: VLAN tag from descriptor
 240  **/
 241 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
 242                               struct sk_buff *skb, bool is_vlan,
 243                               u16 tag)
 244 {
 245         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 246                 if (adapter->vlgrp && is_vlan)
 247                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
 248                 else
 249                         netif_receive_skb(skb);
 250         } else {
 251
 252                 if (adapter->vlgrp && is_vlan)
 253                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 254                 else
 255                         netif_rx(skb);
 256         }
 257 }
 258
 259 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 260                                          u32 status_err,
 261                                          struct sk_buff *skb)
 262 {
 263         skb->ip_summed = CHECKSUM_NONE;
 264
 265         /* Ignore Checksum bit is set */
 266         if ((status_err & IXGBE_RXD_STAT_IXSM) ||
 267                      !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 268                 return;
 269         /* TCP/UDP checksum error bit is set */
 270         if (status_err & (IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE)) {
 271                 /* let the stack verify checksum errors */
 272                 adapter->hw_csum_rx_error++;
 273                 return;
 274         }
 275         /* It must be a TCP or UDP packet with a valid checksum */
 276         if (status_err & (IXGBE_RXD_STAT_L4CS | IXGBE_RXD_STAT_UDPCS))
 277                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 278         adapter->hw_csum_rx_good++;
 279 }
 280
 281 /**
 282  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 283  * @adapter: address of board private structure
 284  **/
 285 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 286                                        struct ixgbe_ring *rx_ring,
 287                                        int cleaned_count)
 288 {
 289         struct net_device *netdev = adapter->netdev;
 290         struct pci_dev *pdev = adapter->pdev;
 291         union ixgbe_adv_rx_desc *rx_desc;
 292         struct ixgbe_rx_buffer *rx_buffer_info;
 293         struct sk_buff *skb;
 294         unsigned int i;
 295         unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 296
 297         i = rx_ring->next_to_use;
 298         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 299
 300         while (cleaned_count--) {
 301                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 302
 303                 if (!rx_buffer_info->page &&
 304                                 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 305                         rx_buffer_info->page = alloc_page(GFP_ATOMIC);
 306                         if (!rx_buffer_info->page) {
 307                                 adapter->alloc_rx_page_failed++;
 308                                 goto no_buffers;
 309                         }
 310                         rx_buffer_info->page_dma =
 311                             pci_map_page(pdev, rx_buffer_info->page,
 312                                          0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 313                 }
 314
 315                 if (!rx_buffer_info->skb) {
 316                         skb = netdev_alloc_skb(netdev, bufsz);
 317
 318                         if (!skb) {
 319                                 adapter->alloc_rx_buff_failed++;
 320                                 goto no_buffers;
 321                         }
 322
 323                         /*
 324                          * Make buffer alignment 2 beyond a 16 byte boundary
 325                          * this will result in a 16 byte aligned IP header after
 326                          * the 14 byte MAC header is removed
 327                          */
 328                         skb_reserve(skb, NET_IP_ALIGN);
 329
 330                         rx_buffer_info->skb = skb;
 331                         rx_buffer_info->dma = pci_map_single(pdev, skb->data,
 332                                                           bufsz,
 333                                                           PCI_DMA_FROMDEVICE);
 334                 }
 335                 /* Refresh the desc even if buffer_addrs didn't change because
 336                  * each write-back erases this info. */
 337                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 338                         rx_desc->read.pkt_addr =
 339                             cpu_to_le64(rx_buffer_info->page_dma);
 340                         rx_desc->read.hdr_addr =
 341                                         cpu_to_le64(rx_buffer_info->dma);
 342                 } else {
 343                         rx_desc->read.pkt_addr =
 344                                         cpu_to_le64(rx_buffer_info->dma);
 345                 }
 346
 347                 i++;
 348                 if (i == rx_ring->count)
 349                         i = 0;
 350                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 351         }
 352 no_buffers:
 353         if (rx_ring->next_to_use != i) {
 354                 rx_ring->next_to_use = i;
 355                 if (i-- == 0)
 356                         i = (rx_ring->count - 1);
 357
 358                 /*
 359                  * Force memory writes to complete before letting h/w
 360                  * know there are new descriptors to fetch.  (Only
 361                  * applicable for weak-ordered memory model archs,
 362                  * such as IA-64).
 363                  */
 364                 wmb();
 365                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 366         }
 367 }
 368
 369 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 370                                struct ixgbe_ring *rx_ring,
 371                                int *work_done, int work_to_do)
 372 {
 373         struct net_device *netdev = adapter->netdev;
 374         struct pci_dev *pdev = adapter->pdev;
 375         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 376         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 377         struct sk_buff *skb;
 378         unsigned int i;
 379         u32 upper_len, len, staterr;
 380         u16 hdr_info, vlan_tag;
 381         bool is_vlan, cleaned = false;
 382         int cleaned_count = 0;
 383
 384         i = rx_ring->next_to_clean;
 385         upper_len = 0;
 386         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 387         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 388         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 389         is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 390         vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 391
 392         while (staterr & IXGBE_RXD_STAT_DD) {
 393                 if (*work_done >= work_to_do)
 394                         break;
 395                 (*work_done)++;
 396
 397                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 398                         hdr_info =
 399                             le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
 400                         len =
 401                             ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 402                              IXGBE_RXDADV_HDRBUFLEN_SHIFT);
 403                         if (hdr_info & IXGBE_RXDADV_SPH)
 404                                 adapter->rx_hdr_split++;
 405                         if (len > IXGBE_RX_HDR_SIZE)
 406                                 len = IXGBE_RX_HDR_SIZE;
 407                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 408                 } else
 409                         len = le16_to_cpu(rx_desc->wb.upper.length);
 410
 411                 cleaned = true;
 412                 skb = rx_buffer_info->skb;
 413                 prefetch(skb->data - NET_IP_ALIGN);
 414                 rx_buffer_info->skb = NULL;
 415
 416                 if (len && !skb_shinfo(skb)->nr_frags) {
 417                         pci_unmap_single(pdev, rx_buffer_info->dma,
 418                                          adapter->rx_buf_len + NET_IP_ALIGN,
 419                                          PCI_DMA_FROMDEVICE);
 420                         skb_put(skb, len);
 421                 }
 422
 423                 if (upper_len) {
 424                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 425                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
 426                         rx_buffer_info->page_dma = 0;
 427                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 428                                            rx_buffer_info->page, 0, upper_len);
 429                         rx_buffer_info->page = NULL;
 430
 431                         skb->len += upper_len;
 432                         skb->data_len += upper_len;
 433                         skb->truesize += upper_len;
 434                 }
 435
 436                 i++;
 437                 if (i == rx_ring->count)
 438                         i = 0;
 439                 next_buffer = &rx_ring->rx_buffer_info[i];
 440
 441                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 442                 prefetch(next_rxd);
 443
 444                 cleaned_count++;
 445                 if (staterr & IXGBE_RXD_STAT_EOP) {
 446                         rx_ring->stats.packets++;
 447                         rx_ring->stats.bytes += skb->len;
 448                 } else {
 449                         rx_buffer_info->skb = next_buffer->skb;
 450                         rx_buffer_info->dma = next_buffer->dma;
 451                         next_buffer->skb = skb;
 452                         adapter->non_eop_descs++;
 453                         goto next_desc;
 454                 }
 455
 456                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 457                         dev_kfree_skb_irq(skb);
 458                         goto next_desc;
 459                 }
 460
 461                 ixgbe_rx_checksum(adapter, staterr, skb);
 462                 skb->protocol = eth_type_trans(skb, netdev);
 463                 ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
 464                 netdev->last_rx = jiffies;
 465
 466 next_desc:
 467                 rx_desc->wb.upper.status_error = 0;
 468
 469                 /* return some buffers to hardware, one at a time is too slow */
 470                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 471                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 472                         cleaned_count = 0;
 473                 }
 474
 475                 /* use prefetched values */
 476                 rx_desc = next_rxd;
 477                 rx_buffer_info = next_buffer;
 478
 479                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 480                 is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 481                 vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 482         }
 483
 484         rx_ring->next_to_clean = i;
 485         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 486
 487         if (cleaned_count)
 488                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 489
 490         return cleaned;
 491 }
 492
 493 #define IXGBE_MAX_INTR 10
 494 /**
 495  * ixgbe_configure_msix - Configure MSI-X hardware
 496  * @adapter: board private structure
 497  *
 498  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 499  * interrupts.
 500  **/
 501 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 502 {
 503         int i, vector = 0;
 504
 505         for (i = 0; i < adapter->num_tx_queues; i++) {
 506                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i),
 507                                IXGBE_MSIX_VECTOR(vector));
 508                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->tx_eitr),
 509                        adapter->hw.hw_addr + adapter->tx_ring[i].itr_register);
 510                 vector++;
 511         }
 512
 513         for (i = 0; i < adapter->num_rx_queues; i++) {
 514                 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(i),
 515                                IXGBE_MSIX_VECTOR(vector));
 516                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr),
 517                        adapter->hw.hw_addr + adapter->rx_ring[i].itr_register);
 518                 vector++;
 519         }
 520
 521         vector = adapter->num_tx_queues + adapter->num_rx_queues;
 522         ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX,
 523                        IXGBE_MSIX_VECTOR(vector));
 524         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(vector), 1950);
 525 }
 526
 527 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 528 {
 529         struct net_device *netdev = data;
 530         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 531         struct ixgbe_hw *hw = &adapter->hw;
 532         u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 533
 534         if (eicr & IXGBE_EICR_LSC) {
 535                 adapter->lsc_int++;
 536                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 537                         mod_timer(&adapter->watchdog_timer, jiffies);
 538         }
 539         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
 540
 541         return IRQ_HANDLED;
 542 }
 543
 544 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 545 {
 546         struct ixgbe_ring *txr = data;
 547         struct ixgbe_adapter *adapter = txr->adapter;
 548
 549         ixgbe_clean_tx_irq(adapter, txr);
 550
 551         return IRQ_HANDLED;
 552 }
 553
 554 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 555 {
 556         struct ixgbe_ring *rxr = data;
 557         struct ixgbe_adapter *adapter = rxr->adapter;
 558
 559         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->eims_value);
 560         netif_rx_schedule(adapter->netdev, &adapter->napi);
 561         return IRQ_HANDLED;
 562 }
 563
 564 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 565 {
 566         struct ixgbe_adapter *adapter = container_of(napi,
 567                                         struct ixgbe_adapter, napi);
 568         struct net_device *netdev = adapter->netdev;
 569         int work_done = 0;
 570         struct ixgbe_ring *rxr = adapter->rx_ring;
 571
 572         /* Keep link state information with original netdev */
 573         if (!netif_carrier_ok(netdev))
 574                 goto quit_polling;
 575
 576         ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
 577
 578         /* If no Tx and not enough Rx work done, exit the polling mode */
 579         if ((work_done < budget) || !netif_running(netdev)) {
 580 quit_polling:
 581                 netif_rx_complete(netdev, napi);
 582                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 583                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 584                                         rxr->eims_value);
 585         }
 586
 587         return work_done;
 588 }
 589
 590 /**
 591  * ixgbe_setup_msix - Initialize MSI-X interrupts
 592  *
 593  * ixgbe_setup_msix allocates MSI-X vectors and requests
 594  * interrutps from the kernel.
 595  **/
 596 static int ixgbe_setup_msix(struct ixgbe_adapter *adapter)
 597 {
 598         struct net_device *netdev = adapter->netdev;
 599         int i, int_vector = 0, err = 0;
 600         int max_msix_count;
 601
 602         /* +1 for the LSC interrupt */
 603         max_msix_count = adapter->num_rx_queues + adapter->num_tx_queues + 1;
 604         adapter->msix_entries = kcalloc(max_msix_count,
 605                                         sizeof(struct msix_entry), GFP_KERNEL);
 606         if (!adapter->msix_entries)
 607                 return -ENOMEM;
 608
 609         for (i = 0; i < max_msix_count; i++)
 610                 adapter->msix_entries[i].entry = i;
 611
 612         err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
 613                               max_msix_count);
 614         if (err)
 615                 goto out;
 616
 617         for (i = 0; i < adapter->num_tx_queues; i++) {
 618                 sprintf(adapter->tx_ring[i].name, "%s-tx%d", netdev->name, i);
 619                 err = request_irq(adapter->msix_entries[int_vector].vector,
 620                                   &ixgbe_msix_clean_tx,
 621                                   0,
 622                                   adapter->tx_ring[i].name,
 623                                   &(adapter->tx_ring[i]));
 624                 if (err) {
 625                         DPRINTK(PROBE, ERR,
 626                                 "request_irq failed for MSIX interrupt "
 627                                 "Error: %d\n", err);
 628                         goto release_irqs;
 629                 }
 630                 adapter->tx_ring[i].eims_value =
 631                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 632                 adapter->tx_ring[i].itr_register = IXGBE_EITR(int_vector);
 633                 int_vector++;
 634         }
 635
 636         for (i = 0; i < adapter->num_rx_queues; i++) {
 637                 if (strlen(netdev->name) < (IFNAMSIZ - 5))
 638                         sprintf(adapter->rx_ring[i].name,
 639                                 "%s-rx%d", netdev->name, i);
 640                 else
 641                         memcpy(adapter->rx_ring[i].name,
 642                                netdev->name, IFNAMSIZ);
 643                 err = request_irq(adapter->msix_entries[int_vector].vector,
 644                                   &ixgbe_msix_clean_rx, 0,
 645                                   adapter->rx_ring[i].name,
 646                                   &(adapter->rx_ring[i]));
 647                 if (err) {
 648                         DPRINTK(PROBE, ERR,
 649                                 "request_irq failed for MSIX interrupt "
 650                                 "Error: %d\n", err);
 651                         goto release_irqs;
 652                 }
 653
 654                 adapter->rx_ring[i].eims_value =
 655                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 656                 adapter->rx_ring[i].itr_register = IXGBE_EITR(int_vector);
 657                 int_vector++;
 658         }
 659
 660         sprintf(adapter->lsc_name, "%s-lsc", netdev->name);
 661         err = request_irq(adapter->msix_entries[int_vector].vector,
 662                           &ixgbe_msix_lsc, 0, adapter->lsc_name, netdev);
 663         if (err) {
 664                 DPRINTK(PROBE, ERR,
 665                         "request_irq for msix_lsc failed: %d\n", err);
 666                 goto release_irqs;
 667         }
 668
 669         /* FIXME: implement netif_napi_remove() instead */
 670         adapter->napi.poll = ixgbe_clean_rxonly;
 671         adapter->flags |= IXGBE_FLAG_MSIX_ENABLED;
 672         return 0;
 673
 674 release_irqs:
 675         int_vector--;
 676         for (; int_vector >= adapter->num_tx_queues; int_vector--)
 677                 free_irq(adapter->msix_entries[int_vector].vector,
 678                          &(adapter->rx_ring[int_vector -
 679                                             adapter->num_tx_queues]));
 680
 681         for (; int_vector >= 0; int_vector--)
 682                 free_irq(adapter->msix_entries[int_vector].vector,
 683                          &(adapter->tx_ring[int_vector]));
 684 out:
 685         kfree(adapter->msix_entries);
 686         adapter->msix_entries = NULL;
 687         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 688         return err;
 689 }
 690
 691 /**
 692  * ixgbe_intr - Interrupt Handler
 693  * @irq: interrupt number
 694  * @data: pointer to a network interface device structure
 695  * @pt_regs: CPU registers structure
 696  **/
 697 static irqreturn_t ixgbe_intr(int irq, void *data)
 698 {
 699         struct net_device *netdev = data;
 700         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 701         struct ixgbe_hw *hw = &adapter->hw;
 702         u32 eicr;
 703
 704         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 705
 706         if (!eicr)
 707                 return IRQ_NONE;        /* Not our interrupt */
 708
 709         if (eicr & IXGBE_EICR_LSC) {
 710                 adapter->lsc_int++;
 711                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 712                         mod_timer(&adapter->watchdog_timer, jiffies);
 713         }
 714         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 715                 /* Disable interrupts and register for poll. The flush of the
 716                  * posted write is intentionally left out. */
 717                 atomic_inc(&adapter->irq_sem);
 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         irqreturn_t(*handler) (int, void *) = &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         atomic_inc(&adapter->irq_sem);
 806         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 807         IXGBE_WRITE_FLUSH(&adapter->hw);
 808         synchronize_irq(adapter->pdev->irq);
 809 }
 810
 811 /**
 812  * ixgbe_irq_enable - Enable default interrupt generation settings
 813  * @adapter: board private structure
 814  **/
 815 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
 816 {
 817         if (atomic_dec_and_test(&adapter->irq_sem)) {
 818                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
 819                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC,
 820                                         (IXGBE_EIMS_ENABLE_MASK &
 821                                          ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC)));
 822                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 823                                 IXGBE_EIMS_ENABLE_MASK);
 824                 IXGBE_WRITE_FLUSH(&adapter->hw);
 825         }
 826 }
 827
 828 /**
 829  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 830  *
 831  **/
 832 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
 833 {
 834         int i;
 835         struct ixgbe_hw *hw = &adapter->hw;
 836
 837         if (adapter->rx_eitr)
 838                 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
 839                                 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));
 840
 841         /* for re-triggering the interrupt in non-NAPI mode */
 842         adapter->rx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 843         adapter->tx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 844
 845         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
 846         for (i = 0; i < adapter->num_tx_queues; i++)
 847                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i), i);
 848 }
 849
 850 /**
 851  * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
 852  * @adapter: board private structure
 853  *
 854  * Configure the Tx unit of the MAC after a reset.
 855  **/
 856 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
 857 {
 858         u64 tdba;
 859         struct ixgbe_hw *hw = &adapter->hw;
 860         u32 i, tdlen;
 861
 862         /* Setup the HW Tx Head and Tail descriptor pointers */
 863         for (i = 0; i < adapter->num_tx_queues; i++) {
 864                 tdba = adapter->tx_ring[i].dma;
 865                 tdlen = adapter->tx_ring[i].count *
 866                     sizeof(union ixgbe_adv_tx_desc);
 867                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i), (tdba & DMA_32BIT_MASK));
 868                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
 869                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i), tdlen);
 870                 IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
 871                 IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);
 872                 adapter->tx_ring[i].head = IXGBE_TDH(i);
 873                 adapter->tx_ring[i].tail = IXGBE_TDT(i);
 874         }
 875
 876         IXGBE_WRITE_REG(hw, IXGBE_TIPG, IXGBE_TIPG_FIBER_DEFAULT);
 877 }
 878
 879 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
 880                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
 881
 882 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT                 2
 883 /**
 884  * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
 885  * @adapter: board private structure
 886  *
 887  * Configure the Rx unit of the MAC after a reset.
 888  **/
 889 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 890 {
 891         u64 rdba;
 892         struct ixgbe_hw *hw = &adapter->hw;
 893         struct net_device *netdev = adapter->netdev;
 894         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 895         u32 rdlen, rxctrl, rxcsum;
 896         u32 random[10];
 897         u32 reta, mrqc;
 898         int i;
 899         u32 fctrl, hlreg0;
 900         u32 srrctl;
 901         u32 pages;
 902
 903         /* Decide whether to use packet split mode or not */
 904         if (netdev->mtu > ETH_DATA_LEN)
 905                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
 906         else
 907                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
 908
 909         /* Set the RX buffer length according to the mode */
 910         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 911                 adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
 912         } else {
 913                 if (netdev->mtu <= ETH_DATA_LEN)
 914                         adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
 915                 else
 916                         adapter->rx_buf_len = ALIGN(max_frame, 1024);
 917         }
 918
 919         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
 920         fctrl |= IXGBE_FCTRL_BAM;
 921         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
 922
 923         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 924         if (adapter->netdev->mtu <= ETH_DATA_LEN)
 925                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
 926         else
 927                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 928         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
 929
 930         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
 931
 932         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
 933         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
 934         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
 935
 936         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 937                 srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 938                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
 939                 srrctl |= ((IXGBE_RX_HDR_SIZE <<
 940                             IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
 941                            IXGBE_SRRCTL_BSIZEHDR_MASK);
 942         } else {
 943                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
 944
 945                 if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
 946                         srrctl |=
 947                              IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 948                 else
 949                         srrctl |=
 950                              adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 951         }
 952         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);
 953
 954         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
 955         /* disable receives while setting up the descriptors */
 956         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
 957         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
 958
 959         /* Setup the HW Rx Head and Tail Descriptor Pointers and
 960          * the Base and Length of the Rx Descriptor Ring */
 961         for (i = 0; i < adapter->num_rx_queues; i++) {
 962                 rdba = adapter->rx_ring[i].dma;
 963                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
 964                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
 965                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
 966                 IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
 967                 IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
 968                 adapter->rx_ring[i].head = IXGBE_RDH(i);
 969                 adapter->rx_ring[i].tail = IXGBE_RDT(i);
 970         }
 971
 972         if (adapter->num_rx_queues > 1) {
 973                 /* Random 40bytes used as random key in RSS hash function */
 974                 get_random_bytes(&random[0], 40);
 975
 976                 switch (adapter->num_rx_queues) {
 977                 case 8:
 978                 case 4:
 979                         /* Bits [3:0] in each byte refers the Rx queue no */
 980                         reta = 0x00010203;
 981                         break;
 982                 case 2:
 983                         reta = 0x00010001;
 984                         break;
 985                 default:
 986                         reta = 0x00000000;
 987                         break;
 988                 }
 989
 990                 /* Fill out redirection table */
 991                 for (i = 0; i < 32; i++) {
 992                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i, reta);
 993                         if (adapter->num_rx_queues > 4) {
 994                                 i++;
 995                                 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i,
 996                                                       0x04050607);
 997                         }
 998                 }
 999
1000                 /* Fill out hash function seeds */
1001                 for (i = 0; i < 10; i++)
1002                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RSSRK(0), i, random[i]);
1003
1004                 mrqc = IXGBE_MRQC_RSSEN
1005                     /* Perform hash on these packet types */
1006                     | IXGBE_MRQC_RSS_FIELD_IPV4
1007                     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1008                     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1009                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1010                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1011                     | IXGBE_MRQC_RSS_FIELD_IPV6
1012                     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1013                     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1014                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1015                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1016
1017                 /* Multiqueue and packet checksumming are mutually exclusive. */
1018                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1019                 rxcsum |= IXGBE_RXCSUM_PCSD;
1020                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1021         } else {
1022                 /* Enable Receive Checksum Offload for TCP and UDP */
1023                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1024                 if (adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1025                         /* Enable IPv4 payload checksum for UDP fragments
1026                          * Must be used in conjunction with packet-split. */
1027                         rxcsum |= IXGBE_RXCSUM_IPPCSE;
1028                 } else {
1029                         /* don't need to clear IPPCSE as it defaults to 0 */
1030                 }
1031                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1032         }
1033         /* Enable Receives */
1034         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
1035         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1036 }
1037
1038 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1039                                    struct vlan_group *grp)
1040 {
1041         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1042         u32 ctrl;
1043
1044         ixgbe_irq_disable(adapter);
1045         adapter->vlgrp = grp;
1046
1047         if (grp) {
1048                 /* enable VLAN tag insert/strip */
1049                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1050                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
1051                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1052                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1053         }
1054
1055         ixgbe_irq_enable(adapter);
1056 }
1057
1058 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1059 {
1060         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1061
1062         /* add VID to filter table */
1063         ixgbe_set_vfta(&adapter->hw, vid, 0, true);
1064 }
1065
1066 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1067 {
1068         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1069
1070         ixgbe_irq_disable(adapter);
1071         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1072         ixgbe_irq_enable(adapter);
1073
1074         /* remove VID from filter table */
1075         ixgbe_set_vfta(&adapter->hw, vid, 0, false);
1076 }
1077
1078 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1079 {
1080         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1081
1082         if (adapter->vlgrp) {
1083                 u16 vid;
1084                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1085                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1086                                 continue;
1087                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1088                 }
1089         }
1090 }
1091
1092 /**
1093  * ixgbe_set_multi - Multicast and Promiscuous mode set
1094  * @netdev: network interface device structure
1095  *
1096  * The set_multi entry point is called whenever the multicast address
1097  * list or the network interface flags are updated.  This routine is
1098  * responsible for configuring the hardware for proper multicast,
1099  * promiscuous mode, and all-multi behavior.
1100  **/
1101 static void ixgbe_set_multi(struct net_device *netdev)
1102 {
1103         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1104         struct ixgbe_hw *hw = &adapter->hw;
1105         struct dev_mc_list *mc_ptr;
1106         u8 *mta_list;
1107         u32 fctrl;
1108         int i;
1109
1110         /* Check for Promiscuous and All Multicast modes */
1111
1112         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1113
1114         if (netdev->flags & IFF_PROMISC) {
1115                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1116         } else if (netdev->flags & IFF_ALLMULTI) {
1117                 fctrl |= IXGBE_FCTRL_MPE;
1118                 fctrl &= ~IXGBE_FCTRL_UPE;
1119         } else {
1120                 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1121         }
1122
1123         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1124
1125         if (netdev->mc_count) {
1126                 mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
1127                 if (!mta_list)
1128                         return;
1129
1130                 /* Shared function expects packed array of only addresses. */
1131                 mc_ptr = netdev->mc_list;
1132
1133                 for (i = 0; i < netdev->mc_count; i++) {
1134                         if (!mc_ptr)
1135                                 break;
1136                         memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
1137                                ETH_ALEN);
1138                         mc_ptr = mc_ptr->next;
1139                 }
1140
1141                 ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
1142                 kfree(mta_list);
1143         } else {
1144                 ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
1145         }
1146
1147 }
1148
1149 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1150 {
1151         struct net_device *netdev = adapter->netdev;
1152         int i;
1153
1154         ixgbe_set_multi(netdev);
1155
1156         ixgbe_restore_vlan(adapter);
1157
1158         ixgbe_configure_tx(adapter);
1159         ixgbe_configure_rx(adapter);
1160         for (i = 0; i < adapter->num_rx_queues; i++)
1161                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1162                                            (adapter->rx_ring[i].count - 1));
1163 }
1164
1165 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1166 {
1167         struct net_device *netdev = adapter->netdev;
1168         int i;
1169         u32 gpie = 0;
1170         struct ixgbe_hw *hw = &adapter->hw;
1171         u32 txdctl, rxdctl, mhadd;
1172         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1173
1174         if (adapter->flags & (IXGBE_FLAG_MSIX_ENABLED |
1175                               IXGBE_FLAG_MSI_ENABLED)) {
1176                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1177                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1178                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1179                 } else {
1180                         /* MSI only */
1181                         gpie = (IXGBE_GPIE_EIAME |
1182                                 IXGBE_GPIE_PBA_SUPPORT);
1183                 }
1184                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_GPIE, gpie);
1185                 gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);
1186         }
1187
1188         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1189
1190         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1191                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1192                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1193
1194                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1195         }
1196
1197         for (i = 0; i < adapter->num_tx_queues; i++) {
1198                 txdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_TXDCTL(i));
1199                 txdctl |= IXGBE_TXDCTL_ENABLE;
1200                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_TXDCTL(i), txdctl);
1201         }
1202
1203         for (i = 0; i < adapter->num_rx_queues; i++) {
1204                 rxdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(i));
1205                 rxdctl |= IXGBE_RXDCTL_ENABLE;
1206                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(i), rxdctl);
1207         }
1208         /* enable all receives */
1209         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1210         rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1211         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1212
1213         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1214                 ixgbe_configure_msix(adapter);
1215         else
1216                 ixgbe_configure_msi_and_legacy(adapter);
1217
1218         clear_bit(__IXGBE_DOWN, &adapter->state);
1219         napi_enable(&adapter->napi);
1220         ixgbe_irq_enable(adapter);
1221
1222         /* bring the link up in the watchdog, this could race with our first
1223          * link up interrupt but shouldn't be a problem */
1224         mod_timer(&adapter->watchdog_timer, jiffies);
1225         return 0;
1226 }
1227
1228 int ixgbe_up(struct ixgbe_adapter *adapter)
1229 {
1230         /* hardware has been reset, we need to reload some things */
1231         ixgbe_configure(adapter);
1232
1233         return ixgbe_up_complete(adapter);
1234 }
1235
1236 void ixgbe_reset(struct ixgbe_adapter *adapter)
1237 {
1238         if (ixgbe_init_hw(&adapter->hw))
1239                 DPRINTK(PROBE, ERR, "Hardware Error\n");
1240
1241         /* reprogram the RAR[0] in case user changed it. */
1242         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
1243
1244 }
1245
1246 #ifdef CONFIG_PM
1247 static int ixgbe_resume(struct pci_dev *pdev)
1248 {
1249         struct net_device *netdev = pci_get_drvdata(pdev);
1250         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1251         u32 err, num_rx_queues = adapter->num_rx_queues;
1252
1253         pci_set_power_state(pdev, PCI_D0);
1254         pci_restore_state(pdev);
1255         err = pci_enable_device(pdev);
1256         if (err) {
1257                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
1258                                 "suspend\n");
1259                 return err;
1260         }
1261         pci_set_master(pdev);
1262
1263         pci_enable_wake(pdev, PCI_D3hot, 0);
1264         pci_enable_wake(pdev, PCI_D3cold, 0);
1265
1266         if (netif_running(netdev)) {
1267                 err = ixgbe_request_irq(adapter, &num_rx_queues);
1268                 if (err)
1269                         return err;
1270         }
1271
1272         ixgbe_reset(adapter);
1273
1274         if (netif_running(netdev))
1275                 ixgbe_up(adapter);
1276
1277         netif_device_attach(netdev);
1278
1279         return 0;
1280 }
1281 #endif
1282
1283 /**
1284  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
1285  * @adapter: board private structure
1286  * @rx_ring: ring to free buffers from
1287  **/
1288 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
1289                                 struct ixgbe_ring *rx_ring)
1290 {
1291         struct pci_dev *pdev = adapter->pdev;
1292         unsigned long size;
1293         unsigned int i;
1294
1295         /* Free all the Rx ring sk_buffs */
1296
1297         for (i = 0; i < rx_ring->count; i++) {
1298                 struct ixgbe_rx_buffer *rx_buffer_info;
1299
1300                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1301                 if (rx_buffer_info->dma) {
1302                         pci_unmap_single(pdev, rx_buffer_info->dma,
1303                                          adapter->rx_buf_len,
1304                                          PCI_DMA_FROMDEVICE);
1305                         rx_buffer_info->dma = 0;
1306                 }
1307                 if (rx_buffer_info->skb) {
1308                         dev_kfree_skb(rx_buffer_info->skb);
1309                         rx_buffer_info->skb = NULL;
1310                 }
1311                 if (!rx_buffer_info->page)
1312                         continue;
1313                 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
1314                                PCI_DMA_FROMDEVICE);
1315                 rx_buffer_info->page_dma = 0;
1316
1317                 put_page(rx_buffer_info->page);
1318                 rx_buffer_info->page = NULL;
1319         }
1320
1321         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
1322         memset(rx_ring->rx_buffer_info, 0, size);
1323
1324         /* Zero out the descriptor ring */
1325         memset(rx_ring->desc, 0, rx_ring->size);
1326
1327         rx_ring->next_to_clean = 0;
1328         rx_ring->next_to_use = 0;
1329
1330         writel(0, adapter->hw.hw_addr + rx_ring->head);
1331         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1332 }
1333
1334 /**
1335  * ixgbe_clean_tx_ring - Free Tx Buffers
1336  * @adapter: board private structure
1337  * @tx_ring: ring to be cleaned
1338  **/
1339 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
1340                                 struct ixgbe_ring *tx_ring)
1341 {
1342         struct ixgbe_tx_buffer *tx_buffer_info;
1343         unsigned long size;
1344         unsigned int i;
1345
1346         /* Free all the Tx ring sk_buffs */
1347
1348         for (i = 0; i < tx_ring->count; i++) {
1349                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1350                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1351         }
1352
1353         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
1354         memset(tx_ring->tx_buffer_info, 0, size);
1355
1356         /* Zero out the descriptor ring */
1357         memset(tx_ring->desc, 0, tx_ring->size);
1358
1359         tx_ring->next_to_use = 0;
1360         tx_ring->next_to_clean = 0;
1361
1362         writel(0, adapter->hw.hw_addr + tx_ring->head);
1363         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1364 }
1365
1366 /**
1367  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
1368  * @adapter: board private structure
1369  **/
1370 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
1371 {
1372         int i;
1373
1374         for (i = 0; i < adapter->num_tx_queues; i++)
1375                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1376 }
1377
1378 /**
1379  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
1380  * @adapter: board private structure
1381  **/
1382 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
1383 {
1384         int i;
1385
1386         for (i = 0; i < adapter->num_rx_queues; i++)
1387                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1388 }
1389
1390 void ixgbe_down(struct ixgbe_adapter *adapter)
1391 {
1392         struct net_device *netdev = adapter->netdev;
1393         u32 rxctrl;
1394
1395         /* signal that we are down to the interrupt handler */
1396         set_bit(__IXGBE_DOWN, &adapter->state);
1397
1398         /* disable receives */
1399         rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
1400         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
1401                         rxctrl & ~IXGBE_RXCTRL_RXEN);
1402
1403         netif_tx_disable(netdev);
1404
1405         /* disable transmits in the hardware */
1406
1407         /* flush both disables */
1408         IXGBE_WRITE_FLUSH(&adapter->hw);
1409         msleep(10);
1410
1411         ixgbe_irq_disable(adapter);
1412
1413         napi_disable(&adapter->napi);
1414         del_timer_sync(&adapter->watchdog_timer);
1415
1416         netif_carrier_off(netdev);
1417         netif_stop_queue(netdev);
1418
1419         ixgbe_reset(adapter);
1420         ixgbe_clean_all_tx_rings(adapter);
1421         ixgbe_clean_all_rx_rings(adapter);
1422
1423 }
1424
1425 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
1426 {
1427         struct net_device *netdev = pci_get_drvdata(pdev);
1428         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1429 #ifdef CONFIG_PM
1430         int retval = 0;
1431 #endif
1432
1433         netif_device_detach(netdev);
1434
1435         if (netif_running(netdev)) {
1436                 ixgbe_down(adapter);
1437                 ixgbe_free_irq(adapter);
1438         }
1439
1440 #ifdef CONFIG_PM
1441         retval = pci_save_state(pdev);
1442         if (retval)
1443                 return retval;
1444 #endif
1445
1446         pci_enable_wake(pdev, PCI_D3hot, 0);
1447         pci_enable_wake(pdev, PCI_D3cold, 0);
1448
1449         pci_disable_device(pdev);
1450
1451         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1452
1453         return 0;
1454 }
1455
1456 static void ixgbe_shutdown(struct pci_dev *pdev)
1457 {
1458         ixgbe_suspend(pdev, PMSG_SUSPEND);
1459 }
1460
1461 /**
1462  * ixgbe_clean - NAPI Rx polling callback
1463  * @adapter: board private structure
1464  **/
1465 static int ixgbe_clean(struct napi_struct *napi, int budget)
1466 {
1467         struct ixgbe_adapter *adapter = container_of(napi,
1468                                         struct ixgbe_adapter, napi);
1469         struct net_device *netdev = adapter->netdev;
1470         int tx_cleaned = 0, work_done = 0;
1471
1472         /* Keep link state information with original netdev */
1473         if (!netif_carrier_ok(adapter->netdev))
1474                 goto quit_polling;
1475
1476         /* In non-MSIX case, there is no multi-Tx/Rx queue */
1477         tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
1478         ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
1479                            budget);
1480
1481         /* If no Tx and not enough Rx work done, exit the polling mode */
1482         if ((!tx_cleaned && (work_done < budget)) ||
1483             !netif_running(adapter->netdev)) {
1484 quit_polling:
1485                 netif_rx_complete(netdev, napi);
1486                 ixgbe_irq_enable(adapter);
1487         }
1488
1489         return work_done;
1490 }
1491
1492 /**
1493  * ixgbe_tx_timeout - Respond to a Tx Hang
1494  * @netdev: network interface device structure
1495  **/
1496 static void ixgbe_tx_timeout(struct net_device *netdev)
1497 {
1498         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1499
1500         /* Do the reset outside of interrupt context */
1501         schedule_work(&adapter->reset_task);
1502 }
1503
1504 static void ixgbe_reset_task(struct work_struct *work)
1505 {
1506         struct ixgbe_adapter *adapter;
1507         adapter = container_of(work, struct ixgbe_adapter, reset_task);
1508
1509         adapter->tx_timeout_count++;
1510
1511         ixgbe_down(adapter);
1512         ixgbe_up(adapter);
1513 }
1514
1515 /**
1516  * ixgbe_alloc_queues - Allocate memory for all rings
1517  * @adapter: board private structure to initialize
1518  *
1519  * We allocate one ring per queue at run-time since we don't know the
1520  * number of queues at compile-time.  The polling_netdev array is
1521  * intended for Multiqueue, but should work fine with a single queue.
1522  **/
1523 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
1524 {
1525         int i;
1526
1527         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1528                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1529         if (!adapter->tx_ring)
1530                 return -ENOMEM;
1531
1532         for (i = 0; i < adapter->num_tx_queues; i++)
1533                 adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;
1534
1535         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1536                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1537         if (!adapter->rx_ring) {
1538                 kfree(adapter->tx_ring);
1539                 return -ENOMEM;
1540         }
1541
1542         for (i = 0; i < adapter->num_rx_queues; i++) {
1543                 adapter->rx_ring[i].adapter = adapter;
1544                 adapter->rx_ring[i].itr_register = IXGBE_EITR(i);
1545                 adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
1546         }
1547
1548         return 0;
1549 }
1550
1551 /**
1552  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
1553  * @adapter: board private structure to initialize
1554  *
1555  * ixgbe_sw_init initializes the Adapter private data structure.
1556  * Fields are initialized based on PCI device information and
1557  * OS network device settings (MTU size).
1558  **/
1559 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
1560 {
1561         struct ixgbe_hw *hw = &adapter->hw;
1562         struct pci_dev *pdev = adapter->pdev;
1563
1564         /* default flow control settings */
1565         hw->fc.original_type = ixgbe_fc_full;
1566         hw->fc.type = ixgbe_fc_full;
1567
1568         hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
1569         if (hw->mac.ops.reset(hw)) {
1570                 dev_err(&pdev->dev, "HW Init failed\n");
1571                 return -EIO;
1572         }
1573         if (hw->phy.ops.setup_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true,
1574                                    false)) {
1575                 dev_err(&pdev->dev, "Link Speed setup failed\n");
1576                 return -EIO;
1577         }
1578
1579         /* initialize eeprom parameters */
1580         if (ixgbe_init_eeprom(hw)) {
1581                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
1582                 return -EIO;
1583         }
1584
1585         /* Set the default values */
1586         adapter->num_rx_queues = IXGBE_DEFAULT_RXQ;
1587         adapter->num_tx_queues = 1;
1588         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
1589
1590         if (ixgbe_alloc_queues(adapter)) {
1591                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1592                 return -ENOMEM;
1593         }
1594
1595         atomic_set(&adapter->irq_sem, 1);
1596         set_bit(__IXGBE_DOWN, &adapter->state);
1597
1598         return 0;
1599 }
1600
1601 /**
1602  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
1603  * @adapter: board private structure
1604  * @txdr:    tx descriptor ring (for a specific queue) to setup
1605  *
1606  * Return 0 on success, negative on failure
1607  **/
1608 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
1609                              struct ixgbe_ring *txdr)
1610 {
1611         struct pci_dev *pdev = adapter->pdev;
1612         int size;
1613
1614         size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
1615         txdr->tx_buffer_info = vmalloc(size);
1616         if (!txdr->tx_buffer_info) {
1617                 DPRINTK(PROBE, ERR,
1618                 "Unable to allocate memory for the transmit descriptor ring\n");
1619                 return -ENOMEM;
1620         }
1621         memset(txdr->tx_buffer_info, 0, size);
1622
1623         /* round up to nearest 4K */
1624         txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
1625         txdr->size = ALIGN(txdr->size, 4096);
1626
1627         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1628         if (!txdr->desc) {
1629                 vfree(txdr->tx_buffer_info);
1630                 DPRINTK(PROBE, ERR,
1631                         "Memory allocation failed for the tx desc ring\n");
1632                 return -ENOMEM;
1633         }
1634
1635         txdr->adapter = adapter;
1636         txdr->next_to_use = 0;
1637         txdr->next_to_clean = 0;
1638         txdr->work_limit = txdr->count;
1639         spin_lock_init(&txdr->tx_lock);
1640
1641         return 0;
1642 }
1643
1644 /**
1645  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
1646  * @adapter: board private structure
1647  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1648  *
1649  * Returns 0 on success, negative on failure
1650  **/
1651 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
1652                              struct ixgbe_ring *rxdr)
1653 {
1654         struct pci_dev *pdev = adapter->pdev;
1655         int size, desc_len;
1656
1657         size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
1658         rxdr->rx_buffer_info = vmalloc(size);
1659         if (!rxdr->rx_buffer_info) {
1660                 DPRINTK(PROBE, ERR,
1661                         "vmalloc allocation failed for the rx desc ring\n");
1662                 return -ENOMEM;
1663         }
1664         memset(rxdr->rx_buffer_info, 0, size);
1665
1666         desc_len = sizeof(union ixgbe_adv_rx_desc);
1667
1668         /* Round up to nearest 4K */
1669         rxdr->size = rxdr->count * desc_len;
1670         rxdr->size = ALIGN(rxdr->size, 4096);
1671
1672         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1673
1674         if (!rxdr->desc) {
1675                 DPRINTK(PROBE, ERR,
1676                         "Memory allocation failed for the rx desc ring\n");
1677                 vfree(rxdr->rx_buffer_info);
1678                 return -ENOMEM;
1679         }
1680
1681         rxdr->next_to_clean = 0;
1682         rxdr->next_to_use = 0;
1683         rxdr->adapter = adapter;
1684
1685         return 0;
1686 }
1687
1688 /**
1689  * ixgbe_free_tx_resources - Free Tx Resources per Queue
1690  * @adapter: board private structure
1691  * @tx_ring: Tx descriptor ring for a specific queue
1692  *
1693  * Free all transmit software resources
1694  **/
1695 static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
1696                                     struct ixgbe_ring *tx_ring)
1697 {
1698         struct pci_dev *pdev = adapter->pdev;
1699
1700         ixgbe_clean_tx_ring(adapter, tx_ring);
1701
1702         vfree(tx_ring->tx_buffer_info);
1703         tx_ring->tx_buffer_info = NULL;
1704
1705         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1706
1707         tx_ring->desc = NULL;
1708 }
1709
1710 /**
1711  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
1712  * @adapter: board private structure
1713  *
1714  * Free all transmit software resources
1715  **/
1716 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
1717 {
1718         int i;
1719
1720         for (i = 0; i < adapter->num_tx_queues; i++)
1721                 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
1722 }
1723
1724 /**
1725  * ixgbe_free_rx_resources - Free Rx Resources
1726  * @adapter: board private structure
1727  * @rx_ring: ring to clean the resources from
1728  *
1729  * Free all receive software resources
1730  **/
1731 static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
1732                                     struct ixgbe_ring *rx_ring)
1733 {
1734         struct pci_dev *pdev = adapter->pdev;
1735
1736         ixgbe_clean_rx_ring(adapter, rx_ring);
1737
1738         vfree(rx_ring->rx_buffer_info);
1739         rx_ring->rx_buffer_info = NULL;
1740
1741         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1742
1743         rx_ring->desc = NULL;
1744 }
1745
1746 /**
1747  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
1748  * @adapter: board private structure
1749  *
1750  * Free all receive software resources
1751  **/
1752 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
1753 {
1754         int i;
1755
1756         for (i = 0; i < adapter->num_rx_queues; i++)
1757                 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
1758 }
1759
1760 /**
1761  * ixgbe_setup_all_tx_resources - wrapper to allocate Tx resources
1762  *                                (Descriptors) for all queues
1763  * @adapter: board private structure
1764  *
1765  * If this function returns with an error, then it's possible one or
1766  * more of the rings is populated (while the rest are not).  It is the
1767  * callers duty to clean those orphaned rings.
1768  *
1769  * Return 0 on success, negative on failure
1770  **/
1771 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
1772 {
1773         int i, err = 0;
1774
1775         for (i = 0; i < adapter->num_tx_queues; i++) {
1776                 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1777                 if (err) {
1778                         DPRINTK(PROBE, ERR,
1779                                 "Allocation for Tx Queue %u failed\n", i);
1780                         break;
1781                 }
1782         }
1783
1784         return err;
1785 }
1786
1787 /**
1788  * ixgbe_setup_all_rx_resources - wrapper to allocate Rx resources
1789  *                                (Descriptors) for all queues
1790  * @adapter: board private structure
1791  *
1792  * If this function returns with an error, then it's possible one or
1793  * more of the rings is populated (while the rest are not).  It is the
1794  * callers duty to clean those orphaned rings.
1795  *
1796  * Return 0 on success, negative on failure
1797  **/
1798
1799 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
1800 {
1801         int i, err = 0;
1802
1803         for (i = 0; i < adapter->num_rx_queues; i++) {
1804                 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1805                 if (err) {
1806                         DPRINTK(PROBE, ERR,
1807                                 "Allocation for Rx Queue %u failed\n", i);
1808                         break;
1809                 }
1810         }
1811
1812         return err;
1813 }
1814
1815 /**
1816  * ixgbe_change_mtu - Change the Maximum Transfer Unit
1817  * @netdev: network interface device structure
1818  * @new_mtu: new value for maximum frame size
1819  *
1820  * Returns 0 on success, negative on failure
1821  **/
1822 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
1823 {
1824         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1825         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1826
1827         if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
1828             (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
1829                 return -EINVAL;
1830
1831         netdev->mtu = new_mtu;
1832
1833         if (netif_running(netdev)) {
1834                 ixgbe_down(adapter);
1835                 ixgbe_up(adapter);
1836         }
1837
1838         return 0;
1839 }
1840
1841 /**
1842  * ixgbe_open - Called when a network interface is made active
1843  * @netdev: network interface device structure
1844  *
1845  * Returns 0 on success, negative value on failure
1846  *
1847  * The open entry point is called when a network interface is made
1848  * active by the system (IFF_UP).  At this point all resources needed
1849  * for transmit and receive operations are allocated, the interrupt
1850  * handler is registered with the OS, the watchdog timer is started,
1851  * and the stack is notified that the interface is ready.
1852  **/
1853 static int ixgbe_open(struct net_device *netdev)
1854 {
1855         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1856         int err;
1857         u32 ctrl_ext;
1858         u32 num_rx_queues = adapter->num_rx_queues;
1859
1860         /* Let firmware know the driver has taken over */
1861         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
1862         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
1863                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
1864
1865 try_intr_reinit:
1866         /* allocate transmit descriptors */
1867         err = ixgbe_setup_all_tx_resources(adapter);
1868         if (err)
1869                 goto err_setup_tx;
1870
1871         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1872                 num_rx_queues = 1;
1873                 adapter->num_rx_queues = num_rx_queues;
1874         }
1875
1876         /* allocate receive descriptors */
1877         err = ixgbe_setup_all_rx_resources(adapter);
1878         if (err)
1879                 goto err_setup_rx;
1880
1881         ixgbe_configure(adapter);
1882
1883         err = ixgbe_request_irq(adapter, &num_rx_queues);
1884         if (err)
1885                 goto err_req_irq;
1886
1887         /* ixgbe_request might have reduced num_rx_queues */
1888         if (num_rx_queues < adapter->num_rx_queues) {
1889                 /* We didn't get MSI-X, so we need to release everything,
1890                  * set our Rx queue count to num_rx_queues, and redo the
1891                  * whole init process.
1892                  */
1893                 ixgbe_free_irq(adapter);
1894                 if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1895                         pci_disable_msi(adapter->pdev);
1896                         adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
1897                 }
1898                 ixgbe_free_all_rx_resources(adapter);
1899                 ixgbe_free_all_tx_resources(adapter);
1900                 adapter->num_rx_queues = num_rx_queues;
1901
1902                 /* Reset the hardware, and start over. */
1903                 ixgbe_reset(adapter);
1904
1905                 goto try_intr_reinit;
1906         }
1907
1908         err = ixgbe_up_complete(adapter);
1909         if (err)
1910                 goto err_up;
1911
1912         return 0;
1913
1914 err_up:
1915         ixgbe_free_irq(adapter);
1916 err_req_irq:
1917         ixgbe_free_all_rx_resources(adapter);
1918 err_setup_rx:
1919         ixgbe_free_all_tx_resources(adapter);
1920 err_setup_tx:
1921         ixgbe_reset(adapter);
1922
1923         return err;
1924 }
1925
1926 /**
1927  * ixgbe_close - Disables a network interface
1928  * @netdev: network interface device structure
1929  *
1930  * Returns 0, this is not allowed to fail
1931  *
1932  * The close entry point is called when an interface is de-activated
1933  * by the OS.  The hardware is still under the drivers control, but
1934  * needs to be disabled.  A global MAC reset is issued to stop the
1935  * hardware, and all transmit and receive resources are freed.
1936  **/
1937 static int ixgbe_close(struct net_device *netdev)
1938 {
1939         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1940         u32 ctrl_ext;
1941
1942         ixgbe_down(adapter);
1943         ixgbe_free_irq(adapter);
1944
1945         ixgbe_free_all_tx_resources(adapter);
1946         ixgbe_free_all_rx_resources(adapter);
1947
1948         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
1949         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
1950                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
1951
1952         return 0;
1953 }
1954
1955 /**
1956  * ixgbe_update_stats - Update the board statistics counters.
1957  * @adapter: board private structure
1958  **/
1959 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
1960 {
1961         struct ixgbe_hw *hw = &adapter->hw;
1962         u64 good_rx, missed_rx, bprc;
1963
1964         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
1965         good_rx = IXGBE_READ_REG(hw, IXGBE_GPRC);
1966         missed_rx = IXGBE_READ_REG(hw, IXGBE_MPC(0));
1967         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(1));
1968         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(2));
1969         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(3));
1970         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(4));
1971         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(5));
1972         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(6));
1973         missed_rx += IXGBE_READ_REG(hw, IXGBE_MPC(7));
1974         adapter->stats.gprc += (good_rx - missed_rx);
1975
1976         adapter->stats.mpc[0] += missed_rx;
1977         adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
1978         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
1979         adapter->stats.bprc += bprc;
1980         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
1981         adapter->stats.mprc -= bprc;
1982         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
1983         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
1984         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
1985         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
1986         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
1987         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
1988         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
1989
1990         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
1991         adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
1992         adapter->stats.lxontxc += IXGBE_READ_REG(hw, IXGBE_LXONTXC);
1993         adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
1994         adapter->stats.lxofftxc += IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
1995         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
1996         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
1997         adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
1998         adapter->stats.rnbc[0] += IXGBE_READ_REG(hw, IXGBE_RNBC(0));
1999         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2000         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
2001         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
2002         adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
2003         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
2004         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
2005         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
2006         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
2007         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
2008         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
2009         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
2010         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
2011         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
2012
2013         /* Fill out the OS statistics structure */
2014         adapter->net_stats.rx_packets = adapter->stats.gprc;
2015         adapter->net_stats.tx_packets = adapter->stats.gptc;
2016         adapter->net_stats.rx_bytes = adapter->stats.gorc;
2017         adapter->net_stats.tx_bytes = adapter->stats.gotc;
2018         adapter->net_stats.multicast = adapter->stats.mprc;
2019
2020         /* Rx Errors */
2021         adapter->net_stats.rx_errors = adapter->stats.crcerrs +
2022                                                 adapter->stats.rlec;
2023         adapter->net_stats.rx_dropped = 0;
2024         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2025         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2026         adapter->net_stats.rx_missed_errors = adapter->stats.mpc[0];
2027
2028 }
2029
2030 /**
2031  * ixgbe_watchdog - Timer Call-back
2032  * @data: pointer to adapter cast into an unsigned long
2033  **/
2034 static void ixgbe_watchdog(unsigned long data)
2035 {
2036         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
2037         struct net_device *netdev = adapter->netdev;
2038         bool link_up;
2039         u32 link_speed = 0;
2040
2041         adapter->hw.phy.ops.check(&adapter->hw, &(link_speed), &link_up);
2042
2043         if (link_up) {
2044                 if (!netif_carrier_ok(netdev)) {
2045                         u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2046                         u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS);
2047 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
2048 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
2049                         DPRINTK(LINK, INFO, "NIC Link is Up %s, "
2050                                 "Flow Control: %s\n",
2051                                 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
2052                                  "10 Gbps" :
2053                                  (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
2054                                   "1 Gpbs" : "unknown speed")),
2055                                 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
2056                                  (FLOW_RX ? "RX" :
2057                                  (FLOW_TX ? "TX" : "None"))));
2058
2059                         netif_carrier_on(netdev);
2060                         netif_wake_queue(netdev);
2061                 } else {
2062                         /* Force detection of hung controller */
2063                         adapter->detect_tx_hung = true;
2064                 }
2065         } else {
2066                 if (netif_carrier_ok(netdev)) {
2067                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2068                         netif_carrier_off(netdev);
2069                         netif_stop_queue(netdev);
2070                 }
2071         }
2072
2073         ixgbe_update_stats(adapter);
2074
2075         /* Reset the timer */
2076         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2077                 mod_timer(&adapter->watchdog_timer,
2078                           round_jiffies(jiffies + 2 * HZ));
2079 }
2080
2081 #define IXGBE_MAX_TXD_PWR       14
2082 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
2083
2084 /* Tx Descriptors needed, worst case */
2085 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
2086                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
2087 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
2088         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)   /* for context */
2089
2090 static int ixgbe_tso(struct ixgbe_adapter *adapter,
2091                          struct ixgbe_ring *tx_ring, struct sk_buff *skb,
2092                          u32 tx_flags, u8 *hdr_len)
2093 {
2094         struct ixgbe_adv_tx_context_desc *context_desc;
2095         unsigned int i;
2096         int err;
2097         struct ixgbe_tx_buffer *tx_buffer_info;
2098         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2099         u32 mss_l4len_idx = 0, l4len;
2100         *hdr_len = 0;
2101
2102         if (skb_is_gso(skb)) {
2103                 if (skb_header_cloned(skb)) {
2104                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2105                         if (err)
2106                                 return err;
2107                 }
2108                 l4len = tcp_hdrlen(skb);
2109                 *hdr_len += l4len;
2110
2111                 if (skb->protocol == ntohs(ETH_P_IP)) {
2112                         struct iphdr *iph = ip_hdr(skb);
2113                         iph->tot_len = 0;
2114                         iph->check = 0;
2115                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2116                                                                  iph->daddr, 0,
2117                                                                  IPPROTO_TCP,
2118                                                                  0);
2119                         adapter->hw_tso_ctxt++;
2120                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2121                         ipv6_hdr(skb)->payload_len = 0;
2122                         tcp_hdr(skb)->check =
2123                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2124                                              &ipv6_hdr(skb)->daddr,
2125                                              0, IPPROTO_TCP, 0);
2126                         adapter->hw_tso6_ctxt++;
2127                 }
2128
2129                 i = tx_ring->next_to_use;
2130
2131                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2132                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2133
2134                 /* VLAN MACLEN IPLEN */
2135                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2136                         vlan_macip_lens |=
2137                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2138                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2139                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2140                 *hdr_len += skb_network_offset(skb);
2141                 vlan_macip_lens |=
2142                     (skb_transport_header(skb) - skb_network_header(skb));
2143                 *hdr_len +=
2144                     (skb_transport_header(skb) - skb_network_header(skb));
2145                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2146                 context_desc->seqnum_seed = 0;
2147
2148                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2149                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2150                                     IXGBE_ADVTXD_DTYP_CTXT);
2151
2152                 if (skb->protocol == ntohs(ETH_P_IP))
2153                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2154                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2155                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2156
2157                 /* MSS L4LEN IDX */
2158                 mss_l4len_idx |=
2159                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2160                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2161                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2162
2163                 tx_buffer_info->time_stamp = jiffies;
2164                 tx_buffer_info->next_to_watch = i;
2165
2166                 i++;
2167                 if (i == tx_ring->count)
2168                         i = 0;
2169                 tx_ring->next_to_use = i;
2170
2171                 return true;
2172         }
2173         return false;
2174 }
2175
2176 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
2177                                    struct ixgbe_ring *tx_ring,
2178                                    struct sk_buff *skb, u32 tx_flags)
2179 {
2180         struct ixgbe_adv_tx_context_desc *context_desc;
2181         unsigned int i;
2182         struct ixgbe_tx_buffer *tx_buffer_info;
2183         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2184
2185         if (skb->ip_summed == CHECKSUM_PARTIAL ||
2186             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2187                 i = tx_ring->next_to_use;
2188                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2189                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2190
2191                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2192                         vlan_macip_lens |=
2193                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2194                 vlan_macip_lens |= (skb_network_offset(skb) <<
2195                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2196                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2197                         vlan_macip_lens |= (skb_transport_header(skb) -
2198                                             skb_network_header(skb));
2199
2200                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2201                 context_desc->seqnum_seed = 0;
2202
2203                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2204                                     IXGBE_ADVTXD_DTYP_CTXT);
2205
2206                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2207                         if (skb->protocol == ntohs(ETH_P_IP))
2208                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2209
2210                         if (skb->sk->sk_protocol == IPPROTO_TCP)
2211                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2212                 }
2213
2214                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2215                 context_desc->mss_l4len_idx = 0;
2216
2217                 tx_buffer_info->time_stamp = jiffies;
2218                 tx_buffer_info->next_to_watch = i;
2219                 adapter->hw_csum_tx_good++;
2220                 i++;
2221                 if (i == tx_ring->count)
2222                         i = 0;
2223                 tx_ring->next_to_use = i;
2224
2225                 return true;
2226         }
2227         return false;
2228 }
2229
2230 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
2231                         struct ixgbe_ring *tx_ring,
2232                         struct sk_buff *skb, unsigned int first)
2233 {
2234         struct ixgbe_tx_buffer *tx_buffer_info;
2235         unsigned int len = skb->len;
2236         unsigned int offset = 0, size, count = 0, i;
2237         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2238         unsigned int f;
2239
2240         len -= skb->data_len;
2241
2242         i = tx_ring->next_to_use;
2243
2244         while (len) {
2245                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2246                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2247
2248                 tx_buffer_info->length = size;
2249                 tx_buffer_info->dma = pci_map_single(adapter->pdev,
2250                                                   skb->data + offset,
2251                                                   size, PCI_DMA_TODEVICE);
2252                 tx_buffer_info->time_stamp = jiffies;
2253                 tx_buffer_info->next_to_watch = i;
2254
2255                 len -= size;
2256                 offset += size;
2257                 count++;
2258                 i++;
2259                 if (i == tx_ring->count)
2260                         i = 0;
2261         }
2262
2263         for (f = 0; f < nr_frags; f++) {
2264                 struct skb_frag_struct *frag;
2265
2266                 frag = &skb_shinfo(skb)->frags[f];
2267                 len = frag->size;
2268                 offset = frag->page_offset;
2269
2270                 while (len) {
2271                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2272                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2273
2274                         tx_buffer_info->length = size;
2275                         tx_buffer_info->dma = pci_map_page(adapter->pdev,
2276                                                         frag->page,
2277                                                         offset,
2278                                                         size, PCI_DMA_TODEVICE);
2279                         tx_buffer_info->time_stamp = jiffies;
2280                         tx_buffer_info->next_to_watch = i;
2281
2282                         len -= size;
2283                         offset += size;
2284                         count++;
2285                         i++;
2286                         if (i == tx_ring->count)
2287                                 i = 0;
2288                 }
2289         }
2290         if (i == 0)
2291                 i = tx_ring->count - 1;
2292         else
2293                 i = i - 1;
2294         tx_ring->tx_buffer_info[i].skb = skb;
2295         tx_ring->tx_buffer_info[first].next_to_watch = i;
2296
2297         return count;
2298 }
2299
2300 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
2301                                struct ixgbe_ring *tx_ring,
2302                                int tx_flags, int count, u32 paylen, u8 hdr_len)
2303 {
2304         union ixgbe_adv_tx_desc *tx_desc = NULL;
2305         struct ixgbe_tx_buffer *tx_buffer_info;
2306         u32 olinfo_status = 0, cmd_type_len = 0;
2307         unsigned int i;
2308         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2309
2310         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2311
2312         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2313
2314         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2315                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2316
2317         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2318                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2319
2320                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2321                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2322
2323                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2324                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
2325                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2326
2327         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2328                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2329                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2330
2331         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2332
2333         i = tx_ring->next_to_use;
2334         while (count--) {
2335                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2336                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
2337                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2338                 tx_desc->read.cmd_type_len =
2339                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2340                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2341
2342                 i++;
2343                 if (i == tx_ring->count)
2344                         i = 0;
2345         }
2346
2347         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2348
2349         /*
2350          * Force memory writes to complete before letting h/w
2351          * know there are new descriptors to fetch.  (Only
2352          * applicable for weak-ordered memory model archs,
2353          * such as IA-64).
2354          */
2355         wmb();
2356
2357         tx_ring->next_to_use = i;
2358         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2359 }
2360
2361 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2362 {
2363         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2364         struct ixgbe_ring *tx_ring;
2365         unsigned int len = skb->len;
2366         unsigned int first;
2367         unsigned int tx_flags = 0;
2368         unsigned long flags = 0;
2369         u8 hdr_len;
2370         int tso;
2371         unsigned int mss = 0;
2372         int count = 0;
2373         unsigned int f;
2374         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2375         len -= skb->data_len;
2376
2377         tx_ring = adapter->tx_ring;
2378
2379         if (skb->len <= 0) {
2380                 dev_kfree_skb(skb);
2381                 return NETDEV_TX_OK;
2382         }
2383         mss = skb_shinfo(skb)->gso_size;
2384
2385         if (mss)
2386                 count++;
2387         else if (skb->ip_summed == CHECKSUM_PARTIAL)
2388                 count++;
2389
2390         count += TXD_USE_COUNT(len);
2391         for (f = 0; f < nr_frags; f++)
2392                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
2393
2394         spin_lock_irqsave(&tx_ring->tx_lock, flags);
2395         if (IXGBE_DESC_UNUSED(tx_ring) < (count + 2)) {
2396                 adapter->tx_busy++;
2397                 netif_stop_queue(netdev);
2398                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2399                 return NETDEV_TX_BUSY;
2400         }
2401         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2402         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2403                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
2404                 tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
2405         }
2406
2407         if (skb->protocol == ntohs(ETH_P_IP))
2408                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
2409         first = tx_ring->next_to_use;
2410         tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
2411         if (tso < 0) {
2412                 dev_kfree_skb_any(skb);
2413                 return NETDEV_TX_OK;
2414         }
2415
2416         if (tso)
2417                 tx_flags |= IXGBE_TX_FLAGS_TSO;
2418         else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2419                  (skb->ip_summed == CHECKSUM_PARTIAL))
2420                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
2421
2422         ixgbe_tx_queue(adapter, tx_ring, tx_flags,
2423                            ixgbe_tx_map(adapter, tx_ring, skb, first),
2424                            skb->len, hdr_len);
2425
2426         netdev->trans_start = jiffies;
2427
2428         spin_lock_irqsave(&tx_ring->tx_lock, flags);
2429         /* Make sure there is space in the ring for the next send. */
2430         if (IXGBE_DESC_UNUSED(tx_ring) < DESC_NEEDED)
2431                 netif_stop_queue(netdev);
2432         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2433
2434         return NETDEV_TX_OK;
2435 }
2436
2437 /**
2438  * ixgbe_get_stats - Get System Network Statistics
2439  * @netdev: network interface device structure
2440  *
2441  * Returns the address of the device statistics structure.
2442  * The statistics are actually updated from the timer callback.
2443  **/
2444 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
2445 {
2446         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2447
2448         /* only return the current stats */
2449         return &adapter->net_stats;
2450 }
2451
2452 /**
2453  * ixgbe_set_mac - Change the Ethernet Address of the NIC
2454  * @netdev: network interface device structure
2455  * @p: pointer to an address structure
2456  *
2457  * Returns 0 on success, negative on failure
2458  **/
2459 static int ixgbe_set_mac(struct net_device *netdev, void *p)
2460 {
2461         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2462         struct sockaddr *addr = p;
2463
2464         if (!is_valid_ether_addr(addr->sa_data))
2465                 return -EADDRNOTAVAIL;
2466
2467         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2468         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2469
2470         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
2471
2472         return 0;
2473 }
2474
2475 #ifdef CONFIG_NET_POLL_CONTROLLER
2476 /*
2477  * Polling 'interrupt' - used by things like netconsole to send skbs
2478  * without having to re-enable interrupts. It's not called while
2479  * the interrupt routine is executing.
2480  */
2481 static void ixgbe_netpoll(struct net_device *netdev)
2482 {
2483         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2484
2485         disable_irq(adapter->pdev->irq);
2486         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
2487         ixgbe_intr(adapter->pdev->irq, netdev);
2488         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
2489         enable_irq(adapter->pdev->irq);
2490 }
2491 #endif
2492
2493 /**
2494  * ixgbe_probe - Device Initialization Routine
2495  * @pdev: PCI device information struct
2496  * @ent: entry in ixgbe_pci_tbl
2497  *
2498  * Returns 0 on success, negative on failure
2499  *
2500  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
2501  * The OS initialization, configuring of the adapter private structure,
2502  * and a hardware reset occur.
2503  **/
2504 static int __devinit ixgbe_probe(struct pci_dev *pdev,
2505                                  const struct pci_device_id *ent)
2506 {
2507         struct net_device *netdev;
2508         struct ixgbe_adapter *adapter = NULL;
2509         struct ixgbe_hw *hw;
2510         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
2511         unsigned long mmio_start, mmio_len;
2512         static int cards_found;
2513         int i, err, pci_using_dac;
2514         u16 link_status, link_speed, link_width;
2515         u32 part_num;
2516
2517         err = pci_enable_device(pdev);
2518         if (err)
2519                 return err;
2520
2521         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
2522             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
2523                 pci_using_dac = 1;
2524         } else {
2525                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2526                 if (err) {
2527                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2528                         if (err) {
2529                                 dev_err(&pdev->dev, "No usable DMA "
2530                                         "configuration, aborting\n");
2531                                 goto err_dma;
2532                         }
2533                 }
2534                 pci_using_dac = 0;
2535         }
2536
2537         err = pci_request_regions(pdev, ixgbe_driver_name);
2538         if (err) {
2539                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
2540                 goto err_pci_reg;
2541         }
2542
2543         pci_set_master(pdev);
2544
2545         netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
2546         if (!netdev) {
2547                 err = -ENOMEM;
2548                 goto err_alloc_etherdev;
2549         }
2550
2551         SET_MODULE_OWNER(netdev);
2552         SET_NETDEV_DEV(netdev, &pdev->dev);
2553
2554         pci_set_drvdata(pdev, netdev);
2555         adapter = netdev_priv(netdev);
2556
2557         adapter->netdev = netdev;
2558         adapter->pdev = pdev;
2559         hw = &adapter->hw;
2560         hw->back = adapter;
2561         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2562
2563         mmio_start = pci_resource_start(pdev, 0);
2564         mmio_len = pci_resource_len(pdev, 0);
2565
2566         hw->hw_addr = ioremap(mmio_start, mmio_len);
2567         if (!hw->hw_addr) {
2568                 err = -EIO;
2569                 goto err_ioremap;
2570         }
2571
2572         for (i = 1; i <= 5; i++) {
2573                 if (pci_resource_len(pdev, i) == 0)
2574                         continue;
2575         }
2576
2577         netdev->open = &ixgbe_open;
2578         netdev->stop = &ixgbe_close;
2579         netdev->hard_start_xmit = &ixgbe_xmit_frame;
2580         netdev->get_stats = &ixgbe_get_stats;
2581         netdev->set_multicast_list = &ixgbe_set_multi;
2582         netdev->set_mac_address = &ixgbe_set_mac;
2583         netdev->change_mtu = &ixgbe_change_mtu;
2584         ixgbe_set_ethtool_ops(netdev);
2585         netdev->tx_timeout = &ixgbe_tx_timeout;
2586         netdev->watchdog_timeo = 5 * HZ;
2587         netif_napi_add(netdev, &adapter->napi, ixgbe_clean, 64);
2588         netdev->vlan_rx_register = ixgbe_vlan_rx_register;
2589         netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
2590         netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
2591 #ifdef CONFIG_NET_POLL_CONTROLLER
2592         netdev->poll_controller = ixgbe_netpoll;
2593 #endif
2594         strcpy(netdev->name, pci_name(pdev));
2595
2596         netdev->mem_start = mmio_start;
2597         netdev->mem_end = mmio_start + mmio_len;
2598
2599         adapter->bd_number = cards_found;
2600
2601         /* PCI config space info */
2602         hw->vendor_id = pdev->vendor;
2603         hw->device_id = pdev->device;
2604         hw->revision_id = pdev->revision;
2605         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2606         hw->subsystem_device_id = pdev->subsystem_device;
2607
2608         /* Setup hw api */
2609         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
2610         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
2611
2612         err = ii->get_invariants(hw);
2613         if (err)
2614                 goto err_hw_init;
2615
2616         /* setup the private structure */
2617         err = ixgbe_sw_init(adapter);
2618         if (err)
2619                 goto err_sw_init;
2620
2621         netdev->features = NETIF_F_SG |
2622                            NETIF_F_HW_CSUM |
2623                            NETIF_F_HW_VLAN_TX |
2624                            NETIF_F_HW_VLAN_RX |
2625                            NETIF_F_HW_VLAN_FILTER;
2626
2627         netdev->features |= NETIF_F_TSO;
2628
2629         netdev->features |= NETIF_F_TSO6;
2630         if (pci_using_dac)
2631                 netdev->features |= NETIF_F_HIGHDMA;
2632
2633
2634         /* make sure the EEPROM is good */
2635         if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
2636                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
2637                 err = -EIO;
2638                 goto err_eeprom;
2639         }
2640
2641         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
2642         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
2643
2644         if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
2645                 err = -EIO;
2646                 goto err_eeprom;
2647         }
2648
2649         init_timer(&adapter->watchdog_timer);
2650         adapter->watchdog_timer.function = &ixgbe_watchdog;
2651         adapter->watchdog_timer.data = (unsigned long)adapter;
2652
2653         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
2654
2655         /* initialize default flow control settings */
2656         hw->fc.original_type = ixgbe_fc_full;
2657         hw->fc.type = ixgbe_fc_full;
2658         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2659         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2660         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2661
2662         /* Interrupt Throttle Rate */
2663         adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
2664         adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);
2665
2666         /* print bus type/speed/width info */
2667         pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
2668         link_speed = link_status & IXGBE_PCI_LINK_SPEED;
2669         link_width = link_status & IXGBE_PCI_LINK_WIDTH;
2670         dev_info(&pdev->dev, "(PCI Express:%s:%s) "
2671                  "%02x:%02x:%02x:%02x:%02x:%02x\n",
2672                 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
2673                  (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
2674                  "Unknown"),
2675                 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
2676                  (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
2677                  (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
2678                  (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
2679                  "Unknown"),
2680                 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
2681                 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
2682         ixgbe_read_part_num(hw, &part_num);
2683         dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
2684                  hw->mac.type, hw->phy.type,
2685                  (part_num >> 8), (part_num & 0xff));
2686
2687         /* reset the hardware with the new settings */
2688         ixgbe_start_hw(hw);
2689
2690         netif_carrier_off(netdev);
2691         netif_stop_queue(netdev);
2692
2693         strcpy(netdev->name, "eth%d");
2694         err = register_netdev(netdev);
2695         if (err)
2696                 goto err_register;
2697
2698
2699         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
2700         cards_found++;
2701         return 0;
2702
2703 err_register:
2704 err_hw_init:
2705 err_sw_init:
2706 err_eeprom:
2707         iounmap(hw->hw_addr);
2708 err_ioremap:
2709         free_netdev(netdev);
2710 err_alloc_etherdev:
2711         pci_release_regions(pdev);
2712 err_pci_reg:
2713 err_dma:
2714         pci_disable_device(pdev);
2715         return err;
2716 }
2717
2718 /**
2719  * ixgbe_remove - Device Removal Routine
2720  * @pdev: PCI device information struct
2721  *
2722  * ixgbe_remove is called by the PCI subsystem to alert the driver
2723  * that it should release a PCI device.  The could be caused by a
2724  * Hot-Plug event, or because the driver is going to be removed from
2725  * memory.
2726  **/
2727 static void __devexit ixgbe_remove(struct pci_dev *pdev)
2728 {
2729         struct net_device *netdev = pci_get_drvdata(pdev);
2730         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2731
2732         set_bit(__IXGBE_DOWN, &adapter->state);
2733         del_timer_sync(&adapter->watchdog_timer);
2734
2735         flush_scheduled_work();
2736
2737         unregister_netdev(netdev);
2738
2739         kfree(adapter->tx_ring);
2740         kfree(adapter->rx_ring);
2741
2742         iounmap(adapter->hw.hw_addr);
2743         pci_release_regions(pdev);
2744
2745         free_netdev(netdev);
2746
2747         pci_disable_device(pdev);
2748 }
2749
2750 /**
2751  * ixgbe_io_error_detected - called when PCI error is detected
2752  * @pdev: Pointer to PCI device
2753  * @state: The current pci connection state
2754  *
2755  * This function is called after a PCI bus error affecting
2756  * this device has been detected.
2757  */
2758 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
2759                                                 pci_channel_state_t state)
2760 {
2761         struct net_device *netdev = pci_get_drvdata(pdev);
2762         struct ixgbe_adapter *adapter = netdev->priv;
2763
2764         netif_device_detach(netdev);
2765
2766         if (netif_running(netdev))
2767                 ixgbe_down(adapter);
2768         pci_disable_device(pdev);
2769
2770         /* Request a slot slot reset. */
2771         return PCI_ERS_RESULT_NEED_RESET;
2772 }
2773
2774 /**
2775  * ixgbe_io_slot_reset - called after the pci bus has been reset.
2776  * @pdev: Pointer to PCI device
2777  *
2778  * Restart the card from scratch, as if from a cold-boot.
2779  */
2780 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
2781 {
2782         struct net_device *netdev = pci_get_drvdata(pdev);
2783         struct ixgbe_adapter *adapter = netdev->priv;
2784
2785         if (pci_enable_device(pdev)) {
2786                 DPRINTK(PROBE, ERR,
2787                         "Cannot re-enable PCI device after reset.\n");
2788                 return PCI_ERS_RESULT_DISCONNECT;
2789         }
2790         pci_set_master(pdev);
2791
2792         pci_enable_wake(pdev, PCI_D3hot, 0);
2793         pci_enable_wake(pdev, PCI_D3cold, 0);
2794
2795         ixgbe_reset(adapter);
2796
2797         return PCI_ERS_RESULT_RECOVERED;
2798 }
2799
2800 /**
2801  * ixgbe_io_resume - called when traffic can start flowing again.
2802  * @pdev: Pointer to PCI device
2803  *
2804  * This callback is called when the error recovery driver tells us that
2805  * its OK to resume normal operation.
2806  */
2807 static void ixgbe_io_resume(struct pci_dev *pdev)
2808 {
2809         struct net_device *netdev = pci_get_drvdata(pdev);
2810         struct ixgbe_adapter *adapter = netdev->priv;
2811
2812         if (netif_running(netdev)) {
2813                 if (ixgbe_up(adapter)) {
2814                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
2815                         return;
2816                 }
2817         }
2818
2819         netif_device_attach(netdev);
2820
2821 }
2822
2823 static struct pci_error_handlers ixgbe_err_handler = {
2824         .error_detected = ixgbe_io_error_detected,
2825         .slot_reset = ixgbe_io_slot_reset,
2826         .resume = ixgbe_io_resume,
2827 };
2828
2829 static struct pci_driver ixgbe_driver = {
2830         .name     = ixgbe_driver_name,
2831         .id_table = ixgbe_pci_tbl,
2832         .probe    = ixgbe_probe,
2833         .remove   = __devexit_p(ixgbe_remove),
2834 #ifdef CONFIG_PM
2835         .suspend  = ixgbe_suspend,
2836         .resume   = ixgbe_resume,
2837 #endif
2838         .shutdown = ixgbe_shutdown,
2839         .err_handler = &ixgbe_err_handler
2840 };
2841
2842 /**
2843  * ixgbe_init_module - Driver Registration Routine
2844  *
2845  * ixgbe_init_module is the first routine called when the driver is
2846  * loaded. All it does is register with the PCI subsystem.
2847  **/
2848 static int __init ixgbe_init_module(void)
2849 {
2850         int ret;
2851         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
2852                ixgbe_driver_string, ixgbe_driver_version);
2853
2854         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
2855
2856         ret = pci_register_driver(&ixgbe_driver);
2857         return ret;
2858 }
2859 module_init(ixgbe_init_module);
2860
2861 /**
2862  * ixgbe_exit_module - Driver Exit Cleanup Routine
2863  *
2864  * ixgbe_exit_module is called just before the driver is removed
2865  * from memory.
2866  **/
2867 static void __exit ixgbe_exit_module(void)
2868 {
2869         pci_unregister_driver(&ixgbe_driver);
2870 }
2871 module_exit(ixgbe_exit_module);
2872
2873 /* ixgbe_main.c */