drivers/net/ixgbe/ixgbe_main.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2007 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #include <net/checksum.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/if_vlan.h>
  43
  44 #include "ixgbe.h"
  45 #include "ixgbe_common.h"
  46
  47 char ixgbe_driver_name[] = "ixgbe";
  48 static const char ixgbe_driver_string[] =
  49         "Intel(R) 10 Gigabit PCI Express Network Driver";
  50
  51 #define DRV_VERSION "1.1.18"
  52 const char ixgbe_driver_version[] = DRV_VERSION;
  53 static const char ixgbe_copyright[] =
  54          "Copyright (c) 1999-2007 Intel Corporation.";
  55
  56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  57         [board_82598AF]                 = &ixgbe_82598AF_info,
  58         [board_82598EB]                 = &ixgbe_82598EB_info,
  59         [board_82598AT]                 = &ixgbe_82598AT_info,
  60 };
  61
  62 /* ixgbe_pci_tbl - PCI Device ID Table
  63  *
  64  * Wildcard entries (PCI_ANY_ID) should come last
  65  * Last entry must be all 0s
  66  *
  67  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  68  *   Class, Class Mask, private data (not used) }
  69  */
  70 static struct pci_device_id ixgbe_pci_tbl[] = {
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  72          board_82598AF },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  74          board_82598AF },
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
  76          board_82598AT },
  77         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  78          board_82598EB },
  79
  80         /* required last entry */
  81         {0, }
  82 };
  83 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
  84
  85 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  86 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_VERSION(DRV_VERSION);
  89
  90 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  91
  92
  93 #ifdef DEBUG
  94 /**
  95  * ixgbe_get_hw_dev_name - return device name string
  96  * used by hardware layer to print debugging information
  97  **/
  98 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
  99 {
 100         struct ixgbe_adapter *adapter = hw->back;
 101         struct net_device *netdev = adapter->netdev;
 102         return netdev->name;
 103 }
 104 #endif
 105
 106 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
 107                            u8 msix_vector)
 108 {
 109         u32 ivar, index;
 110
 111         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 112         index = (int_alloc_entry >> 2) & 0x1F;
 113         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
 114         ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
 115         ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
 116         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
 117 }
 118
 119 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 120                                              struct ixgbe_tx_buffer
 121                                              *tx_buffer_info)
 122 {
 123         if (tx_buffer_info->dma) {
 124                 pci_unmap_page(adapter->pdev,
 125                                tx_buffer_info->dma,
 126                                tx_buffer_info->length, PCI_DMA_TODEVICE);
 127                 tx_buffer_info->dma = 0;
 128         }
 129         if (tx_buffer_info->skb) {
 130                 dev_kfree_skb_any(tx_buffer_info->skb);
 131                 tx_buffer_info->skb = NULL;
 132         }
 133         /* tx_buffer_info must be completely set up in the transmit path */
 134 }
 135
 136 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 137                                        struct ixgbe_ring *tx_ring,
 138                                        unsigned int eop,
 139                                        union ixgbe_adv_tx_desc *eop_desc)
 140 {
 141         /* Detect a transmit hang in hardware, this serializes the
 142          * check with the clearing of time_stamp and movement of i */
 143         adapter->detect_tx_hung = false;
 144         if (tx_ring->tx_buffer_info[eop].dma &&
 145             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 146             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 147                 /* detected Tx unit hang */
 148                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 149                         "  TDH                  <%x>\n"
 150                         "  TDT                  <%x>\n"
 151                         "  next_to_use          <%x>\n"
 152                         "  next_to_clean        <%x>\n"
 153                         "tx_buffer_info[next_to_clean]\n"
 154                         "  time_stamp           <%lx>\n"
 155                         "  next_to_watch        <%x>\n"
 156                         "  jiffies              <%lx>\n"
 157                         "  next_to_watch.status <%x>\n",
 158                         readl(adapter->hw.hw_addr + tx_ring->head),
 159                         readl(adapter->hw.hw_addr + tx_ring->tail),
 160                         tx_ring->next_to_use,
 161                         tx_ring->next_to_clean,
 162                         tx_ring->tx_buffer_info[eop].time_stamp,
 163                         eop, jiffies, eop_desc->wb.status);
 164                 return true;
 165         }
 166
 167         return false;
 168 }
 169
 170 /**
 171  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 172  * @adapter: board private structure
 173  **/
 174 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 175                                     struct ixgbe_ring *tx_ring)
 176 {
 177         struct net_device *netdev = adapter->netdev;
 178         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 179         struct ixgbe_tx_buffer *tx_buffer_info;
 180         unsigned int i, eop;
 181         bool cleaned = false;
 182         int count = 0;
 183
 184         i = tx_ring->next_to_clean;
 185         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 186         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 187         while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
 188                 for (cleaned = false; !cleaned;) {
 189                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 190                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 191                         cleaned = (i == eop);
 192
 193                         tx_ring->stats.bytes += tx_buffer_info->length;
 194                         ixgbe_unmap_and_free_tx_resource(adapter,
 195                                                          tx_buffer_info);
 196                         tx_desc->wb.status = 0;
 197
 198                         i++;
 199                         if (i == tx_ring->count)
 200                                 i = 0;
 201                 }
 202
 203                 tx_ring->stats.packets++;
 204
 205                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 206                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 207
 208                 /* weight of a sort for tx, avoid endless transmit cleanup */
 209                 if (count++ >= tx_ring->work_limit)
 210                         break;
 211         }
 212
 213         tx_ring->next_to_clean = i;
 214
 215 #define TX_WAKE_THRESHOLD 32
 216         spin_lock(&tx_ring->tx_lock);
 217
 218         if (cleaned && netif_carrier_ok(netdev) &&
 219             (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD) &&
 220             !test_bit(__IXGBE_DOWN, &adapter->state))
 221                 netif_wake_queue(netdev);
 222
 223         spin_unlock(&tx_ring->tx_lock);
 224
 225         if (adapter->detect_tx_hung)
 226                 if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
 227                         netif_stop_queue(netdev);
 228
 229         if (count >= tx_ring->work_limit)
 230                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
 231
 232         return cleaned;
 233 }
 234
 235 /**
 236  * ixgbe_receive_skb - Send a completed packet up the stack
 237  * @adapter: board private structure
 238  * @skb: packet to send up
 239  * @is_vlan: packet has a VLAN tag
 240  * @tag: VLAN tag from descriptor
 241  **/
 242 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
 243                               struct sk_buff *skb, bool is_vlan,
 244                               u16 tag)
 245 {
 246         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 247                 if (adapter->vlgrp && is_vlan)
 248                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
 249                 else
 250                         netif_receive_skb(skb);
 251         } else {
 252
 253                 if (adapter->vlgrp && is_vlan)
 254                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 255                 else
 256                         netif_rx(skb);
 257         }
 258 }
 259
 260 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 261                                          u32 status_err,
 262                                          struct sk_buff *skb)
 263 {
 264         skb->ip_summed = CHECKSUM_NONE;
 265
 266         /* Ignore Checksum bit is set */
 267         if ((status_err & IXGBE_RXD_STAT_IXSM) ||
 268                      !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 269                 return;
 270         /* TCP/UDP checksum error bit is set */
 271         if (status_err & (IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE)) {
 272                 /* let the stack verify checksum errors */
 273                 adapter->hw_csum_rx_error++;
 274                 return;
 275         }
 276         /* It must be a TCP or UDP packet with a valid checksum */
 277         if (status_err & (IXGBE_RXD_STAT_L4CS | IXGBE_RXD_STAT_UDPCS))
 278                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 279         adapter->hw_csum_rx_good++;
 280 }
 281
 282 /**
 283  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 284  * @adapter: address of board private structure
 285  **/
 286 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 287                                        struct ixgbe_ring *rx_ring,
 288                                        int cleaned_count)
 289 {
 290         struct net_device *netdev = adapter->netdev;
 291         struct pci_dev *pdev = adapter->pdev;
 292         union ixgbe_adv_rx_desc *rx_desc;
 293         struct ixgbe_rx_buffer *rx_buffer_info;
 294         struct sk_buff *skb;
 295         unsigned int i;
 296         unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 297
 298         i = rx_ring->next_to_use;
 299         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 300
 301         while (cleaned_count--) {
 302                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 303
 304                 if (!rx_buffer_info->page &&
 305                                 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 306                         rx_buffer_info->page = alloc_page(GFP_ATOMIC);
 307                         if (!rx_buffer_info->page) {
 308                                 adapter->alloc_rx_page_failed++;
 309                                 goto no_buffers;
 310                         }
 311                         rx_buffer_info->page_dma =
 312                             pci_map_page(pdev, rx_buffer_info->page,
 313                                          0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 314                 }
 315
 316                 if (!rx_buffer_info->skb) {
 317                         skb = netdev_alloc_skb(netdev, bufsz);
 318
 319                         if (!skb) {
 320                                 adapter->alloc_rx_buff_failed++;
 321                                 goto no_buffers;
 322                         }
 323
 324                         /*
 325                          * Make buffer alignment 2 beyond a 16 byte boundary
 326                          * this will result in a 16 byte aligned IP header after
 327                          * the 14 byte MAC header is removed
 328                          */
 329                         skb_reserve(skb, NET_IP_ALIGN);
 330
 331                         rx_buffer_info->skb = skb;
 332                         rx_buffer_info->dma = pci_map_single(pdev, skb->data,
 333                                                           bufsz,
 334                                                           PCI_DMA_FROMDEVICE);
 335                 }
 336                 /* Refresh the desc even if buffer_addrs didn't change because
 337                  * each write-back erases this info. */
 338                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 339                         rx_desc->read.pkt_addr =
 340                             cpu_to_le64(rx_buffer_info->page_dma);
 341                         rx_desc->read.hdr_addr =
 342                                         cpu_to_le64(rx_buffer_info->dma);
 343                 } else {
 344                         rx_desc->read.pkt_addr =
 345                                         cpu_to_le64(rx_buffer_info->dma);
 346                 }
 347
 348                 i++;
 349                 if (i == rx_ring->count)
 350                         i = 0;
 351                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 352         }
 353 no_buffers:
 354         if (rx_ring->next_to_use != i) {
 355                 rx_ring->next_to_use = i;
 356                 if (i-- == 0)
 357                         i = (rx_ring->count - 1);
 358
 359                 /*
 360                  * Force memory writes to complete before letting h/w
 361                  * know there are new descriptors to fetch.  (Only
 362                  * applicable for weak-ordered memory model archs,
 363                  * such as IA-64).
 364                  */
 365                 wmb();
 366                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 367         }
 368 }
 369
 370 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 371                                struct ixgbe_ring *rx_ring,
 372                                int *work_done, int work_to_do)
 373 {
 374         struct net_device *netdev = adapter->netdev;
 375         struct pci_dev *pdev = adapter->pdev;
 376         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 377         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 378         struct sk_buff *skb;
 379         unsigned int i;
 380         u32 upper_len, len, staterr;
 381         u16 hdr_info, vlan_tag;
 382         bool is_vlan, cleaned = false;
 383         int cleaned_count = 0;
 384
 385         i = rx_ring->next_to_clean;
 386         upper_len = 0;
 387         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 388         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 389         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 390         is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 391         vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 392
 393         while (staterr & IXGBE_RXD_STAT_DD) {
 394                 if (*work_done >= work_to_do)
 395                         break;
 396                 (*work_done)++;
 397
 398                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 399                         hdr_info =
 400                             le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
 401                         len =
 402                             ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 403                              IXGBE_RXDADV_HDRBUFLEN_SHIFT);
 404                         if (hdr_info & IXGBE_RXDADV_SPH)
 405                                 adapter->rx_hdr_split++;
 406                         if (len > IXGBE_RX_HDR_SIZE)
 407                                 len = IXGBE_RX_HDR_SIZE;
 408                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 409                 } else
 410                         len = le16_to_cpu(rx_desc->wb.upper.length);
 411
 412                 cleaned = true;
 413                 skb = rx_buffer_info->skb;
 414                 prefetch(skb->data - NET_IP_ALIGN);
 415                 rx_buffer_info->skb = NULL;
 416
 417                 if (len && !skb_shinfo(skb)->nr_frags) {
 418                         pci_unmap_single(pdev, rx_buffer_info->dma,
 419                                          adapter->rx_buf_len + NET_IP_ALIGN,
 420                                          PCI_DMA_FROMDEVICE);
 421                         skb_put(skb, len);
 422                 }
 423
 424                 if (upper_len) {
 425                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 426                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
 427                         rx_buffer_info->page_dma = 0;
 428                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 429                                            rx_buffer_info->page, 0, upper_len);
 430                         rx_buffer_info->page = NULL;
 431
 432                         skb->len += upper_len;
 433                         skb->data_len += upper_len;
 434                         skb->truesize += upper_len;
 435                 }
 436
 437                 i++;
 438                 if (i == rx_ring->count)
 439                         i = 0;
 440                 next_buffer = &rx_ring->rx_buffer_info[i];
 441
 442                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 443                 prefetch(next_rxd);
 444
 445                 cleaned_count++;
 446                 if (staterr & IXGBE_RXD_STAT_EOP) {
 447                         rx_ring->stats.packets++;
 448                         rx_ring->stats.bytes += skb->len;
 449                 } else {
 450                         rx_buffer_info->skb = next_buffer->skb;
 451                         rx_buffer_info->dma = next_buffer->dma;
 452                         next_buffer->skb = skb;
 453                         adapter->non_eop_descs++;
 454                         goto next_desc;
 455                 }
 456
 457                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 458                         dev_kfree_skb_irq(skb);
 459                         goto next_desc;
 460                 }
 461
 462                 ixgbe_rx_checksum(adapter, staterr, skb);
 463                 skb->protocol = eth_type_trans(skb, netdev);
 464                 ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
 465                 netdev->last_rx = jiffies;
 466
 467 next_desc:
 468                 rx_desc->wb.upper.status_error = 0;
 469
 470                 /* return some buffers to hardware, one at a time is too slow */
 471                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 472                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 473                         cleaned_count = 0;
 474                 }
 475
 476                 /* use prefetched values */
 477                 rx_desc = next_rxd;
 478                 rx_buffer_info = next_buffer;
 479
 480                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 481                 is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 482                 vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 483         }
 484
 485         rx_ring->next_to_clean = i;
 486         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 487
 488         if (cleaned_count)
 489                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 490
 491         return cleaned;
 492 }
 493
 494 #define IXGBE_MAX_INTR 10
 495 /**
 496  * ixgbe_configure_msix - Configure MSI-X hardware
 497  * @adapter: board private structure
 498  *
 499  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 500  * interrupts.
 501  **/
 502 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 503 {
 504         int i, vector = 0;
 505
 506         for (i = 0; i < adapter->num_tx_queues; i++) {
 507                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i),
 508                                IXGBE_MSIX_VECTOR(vector));
 509                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->tx_eitr),
 510                        adapter->hw.hw_addr + adapter->tx_ring[i].itr_register);
 511                 vector++;
 512         }
 513
 514         for (i = 0; i < adapter->num_rx_queues; i++) {
 515                 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(i),
 516                                IXGBE_MSIX_VECTOR(vector));
 517                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr),
 518                        adapter->hw.hw_addr + adapter->rx_ring[i].itr_register);
 519                 vector++;
 520         }
 521
 522         vector = adapter->num_tx_queues + adapter->num_rx_queues;
 523         ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX,
 524                        IXGBE_MSIX_VECTOR(vector));
 525         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(vector), 1950);
 526 }
 527
 528 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 529 {
 530         struct net_device *netdev = data;
 531         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 532         struct ixgbe_hw *hw = &adapter->hw;
 533         u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 534
 535         if (eicr & IXGBE_EICR_LSC) {
 536                 adapter->lsc_int++;
 537                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 538                         mod_timer(&adapter->watchdog_timer, jiffies);
 539         }
 540         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
 541
 542         return IRQ_HANDLED;
 543 }
 544
 545 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 546 {
 547         struct ixgbe_ring *txr = data;
 548         struct ixgbe_adapter *adapter = txr->adapter;
 549
 550         ixgbe_clean_tx_irq(adapter, txr);
 551
 552         return IRQ_HANDLED;
 553 }
 554
 555 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 556 {
 557         struct ixgbe_ring *rxr = data;
 558         struct ixgbe_adapter *adapter = rxr->adapter;
 559
 560         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->eims_value);
 561         netif_rx_schedule(adapter->netdev, &adapter->napi);
 562         return IRQ_HANDLED;
 563 }
 564
 565 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 566 {
 567         struct ixgbe_adapter *adapter = container_of(napi,
 568                                         struct ixgbe_adapter, napi);
 569         struct net_device *netdev = adapter->netdev;
 570         int work_done = 0;
 571         struct ixgbe_ring *rxr = adapter->rx_ring;
 572
 573         /* Keep link state information with original netdev */
 574         if (!netif_carrier_ok(netdev))
 575                 goto quit_polling;
 576
 577         ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
 578
 579         /* If no Tx and not enough Rx work done, exit the polling mode */
 580         if ((work_done < budget) || !netif_running(netdev)) {
 581 quit_polling:
 582                 netif_rx_complete(netdev, napi);
 583                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 584                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 585                                         rxr->eims_value);
 586         }
 587
 588         return work_done;
 589 }
 590
 591 /**
 592  * ixgbe_setup_msix - Initialize MSI-X interrupts
 593  *
 594  * ixgbe_setup_msix allocates MSI-X vectors and requests
 595  * interrutps from the kernel.
 596  **/
 597 static int ixgbe_setup_msix(struct ixgbe_adapter *adapter)
 598 {
 599         struct net_device *netdev = adapter->netdev;
 600         int i, int_vector = 0, err = 0;
 601         int max_msix_count;
 602
 603         /* +1 for the LSC interrupt */
 604         max_msix_count = adapter->num_rx_queues + adapter->num_tx_queues + 1;
 605         adapter->msix_entries = kcalloc(max_msix_count,
 606                                         sizeof(struct msix_entry), GFP_KERNEL);
 607         if (!adapter->msix_entries)
 608                 return -ENOMEM;
 609
 610         for (i = 0; i < max_msix_count; i++)
 611                 adapter->msix_entries[i].entry = i;
 612
 613         err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
 614                               max_msix_count);
 615         if (err)
 616                 goto out;
 617
 618         for (i = 0; i < adapter->num_tx_queues; i++) {
 619                 sprintf(adapter->tx_ring[i].name, "%s-tx%d", netdev->name, i);
 620                 err = request_irq(adapter->msix_entries[int_vector].vector,
 621                                   &ixgbe_msix_clean_tx,
 622                                   0,
 623                                   adapter->tx_ring[i].name,
 624                                   &(adapter->tx_ring[i]));
 625                 if (err) {
 626                         DPRINTK(PROBE, ERR,
 627                                 "request_irq failed for MSIX interrupt "
 628                                 "Error: %d\n", err);
 629                         goto release_irqs;
 630                 }
 631                 adapter->tx_ring[i].eims_value =
 632                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 633                 adapter->tx_ring[i].itr_register = IXGBE_EITR(int_vector);
 634                 int_vector++;
 635         }
 636
 637         for (i = 0; i < adapter->num_rx_queues; i++) {
 638                 if (strlen(netdev->name) < (IFNAMSIZ - 5))
 639                         sprintf(adapter->rx_ring[i].name,
 640                                 "%s-rx%d", netdev->name, i);
 641                 else
 642                         memcpy(adapter->rx_ring[i].name,
 643                                netdev->name, IFNAMSIZ);
 644                 err = request_irq(adapter->msix_entries[int_vector].vector,
 645                                   &ixgbe_msix_clean_rx, 0,
 646                                   adapter->rx_ring[i].name,
 647                                   &(adapter->rx_ring[i]));
 648                 if (err) {
 649                         DPRINTK(PROBE, ERR,
 650                                 "request_irq failed for MSIX interrupt "
 651                                 "Error: %d\n", err);
 652                         goto release_irqs;
 653                 }
 654
 655                 adapter->rx_ring[i].eims_value =
 656                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 657                 adapter->rx_ring[i].itr_register = IXGBE_EITR(int_vector);
 658                 int_vector++;
 659         }
 660
 661         sprintf(adapter->lsc_name, "%s-lsc", netdev->name);
 662         err = request_irq(adapter->msix_entries[int_vector].vector,
 663                           &ixgbe_msix_lsc, 0, adapter->lsc_name, netdev);
 664         if (err) {
 665                 DPRINTK(PROBE, ERR,
 666                         "request_irq for msix_lsc failed: %d\n", err);
 667                 goto release_irqs;
 668         }
 669
 670         /* FIXME: implement netif_napi_remove() instead */
 671         adapter->napi.poll = ixgbe_clean_rxonly;
 672         adapter->flags |= IXGBE_FLAG_MSIX_ENABLED;
 673         return 0;
 674
 675 release_irqs:
 676         int_vector--;
 677         for (; int_vector >= adapter->num_tx_queues; int_vector--)
 678                 free_irq(adapter->msix_entries[int_vector].vector,
 679                          &(adapter->rx_ring[int_vector -
 680                                             adapter->num_tx_queues]));
 681
 682         for (; int_vector >= 0; int_vector--)
 683                 free_irq(adapter->msix_entries[int_vector].vector,
 684                          &(adapter->tx_ring[int_vector]));
 685 out:
 686         kfree(adapter->msix_entries);
 687         adapter->msix_entries = NULL;
 688         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 689         return err;
 690 }
 691
 692 /**
 693  * ixgbe_intr - Interrupt Handler
 694  * @irq: interrupt number
 695  * @data: pointer to a network interface device structure
 696  * @pt_regs: CPU registers structure
 697  **/
 698 static irqreturn_t ixgbe_intr(int irq, void *data)
 699 {
 700         struct net_device *netdev = data;
 701         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 702         struct ixgbe_hw *hw = &adapter->hw;
 703         u32 eicr;
 704
 705         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 706
 707         if (!eicr)
 708                 return IRQ_NONE;        /* Not our interrupt */
 709
 710         if (eicr & IXGBE_EICR_LSC) {
 711                 adapter->lsc_int++;
 712                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 713                         mod_timer(&adapter->watchdog_timer, jiffies);
 714         }
 715         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 716                 /* Disable interrupts and register for poll. The flush of the
 717                  * posted write is intentionally left out. */
 718                 atomic_inc(&adapter->irq_sem);
 719                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 720                 __netif_rx_schedule(netdev, &adapter->napi);
 721         }
 722
 723         return IRQ_HANDLED;
 724 }
 725
 726 /**
 727  * ixgbe_request_irq - initialize interrupts
 728  * @adapter: board private structure
 729  *
 730  * Attempts to configure interrupts using the best available
 731  * capabilities of the hardware and kernel.
 732  **/
 733 static int ixgbe_request_irq(struct ixgbe_adapter *adapter, u32 *num_rx_queues)
 734 {
 735         struct net_device *netdev = adapter->netdev;
 736         int flags, err;
 737         irqreturn_t(*handler) (int, void *) = &ixgbe_intr;
 738
 739         flags = IRQF_SHARED;
 740
 741         err = ixgbe_setup_msix(adapter);
 742         if (!err)
 743                 goto request_done;
 744
 745         /*
 746          * if we can't do MSI-X, fall through and try MSI
 747          * No need to reallocate memory since we're decreasing the number of
 748          * queues. We just won't use the other ones, also it is freed correctly
 749          * on ixgbe_remove.
 750          */
 751         *num_rx_queues = 1;
 752
 753         /* do MSI */
 754         err = pci_enable_msi(adapter->pdev);
 755         if (!err) {
 756                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
 757                 flags &= ~IRQF_SHARED;
 758                 handler = &ixgbe_intr;
 759         }
 760
 761         err = request_irq(adapter->pdev->irq, handler, flags,
 762                           netdev->name, netdev);
 763         if (err)
 764                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
 765
 766 request_done:
 767         return err;
 768 }
 769
 770 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
 771 {
 772         struct net_device *netdev = adapter->netdev;
 773
 774         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
 775                 int i;
 776
 777                 for (i = 0; i < adapter->num_tx_queues; i++)
 778                         free_irq(adapter->msix_entries[i].vector,
 779                                  &(adapter->tx_ring[i]));
 780                 for (i = 0; i < adapter->num_rx_queues; i++)
 781                         free_irq(adapter->msix_entries[i +
 782                                                 adapter->num_tx_queues].vector,
 783                                 &(adapter->rx_ring[i]));
 784                 i = adapter->num_rx_queues + adapter->num_tx_queues;
 785                 free_irq(adapter->msix_entries[i].vector, netdev);
 786                 pci_disable_msix(adapter->pdev);
 787                 kfree(adapter->msix_entries);
 788                 adapter->msix_entries = NULL;
 789                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 790                 return;
 791         }
 792
 793         free_irq(adapter->pdev->irq, netdev);
 794         if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
 795                 pci_disable_msi(adapter->pdev);
 796                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
 797         }
 798 }
 799
 800 /**
 801  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 802  * @adapter: board private structure
 803  **/
 804 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
 805 {
 806         atomic_inc(&adapter->irq_sem);
 807         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 808         IXGBE_WRITE_FLUSH(&adapter->hw);
 809         synchronize_irq(adapter->pdev->irq);
 810 }
 811
 812 /**
 813  * ixgbe_irq_enable - Enable default interrupt generation settings
 814  * @adapter: board private structure
 815  **/
 816 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
 817 {
 818         if (atomic_dec_and_test(&adapter->irq_sem)) {
 819                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
 820                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC,
 821                                         (IXGBE_EIMS_ENABLE_MASK &
 822                                          ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC)));
 823                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 824                                 IXGBE_EIMS_ENABLE_MASK);
 825                 IXGBE_WRITE_FLUSH(&adapter->hw);
 826         }
 827 }
 828
 829 /**
 830  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 831  *
 832  **/
 833 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
 834 {
 835         int i;
 836         struct ixgbe_hw *hw = &adapter->hw;
 837
 838         if (adapter->rx_eitr)
 839                 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
 840                                 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));
 841
 842         /* for re-triggering the interrupt in non-NAPI mode */
 843         adapter->rx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 844         adapter->tx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 845
 846         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
 847         for (i = 0; i < adapter->num_tx_queues; i++)
 848                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i), i);
 849 }
 850
 851 /**
 852  * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
 853  * @adapter: board private structure
 854  *
 855  * Configure the Tx unit of the MAC after a reset.
 856  **/
 857 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
 858 {
 859         u64 tdba;
 860         struct ixgbe_hw *hw = &adapter->hw;
 861         u32 i, tdlen;
 862
 863         /* Setup the HW Tx Head and Tail descriptor pointers */
 864         for (i = 0; i < adapter->num_tx_queues; i++) {
 865                 tdba = adapter->tx_ring[i].dma;
 866                 tdlen = adapter->tx_ring[i].count *
 867                     sizeof(union ixgbe_adv_tx_desc);
 868                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i), (tdba & DMA_32BIT_MASK));
 869                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
 870                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i), tdlen);
 871                 IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
 872                 IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);
 873                 adapter->tx_ring[i].head = IXGBE_TDH(i);
 874                 adapter->tx_ring[i].tail = IXGBE_TDT(i);
 875         }
 876
 877         IXGBE_WRITE_REG(hw, IXGBE_TIPG, IXGBE_TIPG_FIBER_DEFAULT);
 878 }
 879
 880 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
 881                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
 882
 883 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT                 2
 884 /**
 885  * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
 886  * @adapter: board private structure
 887  *
 888  * Configure the Rx unit of the MAC after a reset.
 889  **/
 890 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 891 {
 892         u64 rdba;
 893         struct ixgbe_hw *hw = &adapter->hw;
 894         struct net_device *netdev = adapter->netdev;
 895         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 896         u32 rdlen, rxctrl, rxcsum;
 897         u32 random[10];
 898         u32 reta, mrqc;
 899         int i;
 900         u32 fctrl, hlreg0;
 901         u32 srrctl;
 902         u32 pages;
 903
 904         /* Decide whether to use packet split mode or not */
 905         if (netdev->mtu > ETH_DATA_LEN)
 906                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
 907         else
 908                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
 909
 910         /* Set the RX buffer length according to the mode */
 911         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 912                 adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
 913         } else {
 914                 if (netdev->mtu <= ETH_DATA_LEN)
 915                         adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
 916                 else
 917                         adapter->rx_buf_len = ALIGN(max_frame, 1024);
 918         }
 919
 920         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
 921         fctrl |= IXGBE_FCTRL_BAM;
 922         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
 923
 924         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 925         if (adapter->netdev->mtu <= ETH_DATA_LEN)
 926                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
 927         else
 928                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 929         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
 930
 931         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
 932
 933         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
 934         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
 935         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
 936
 937         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 938                 srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 939                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
 940                 srrctl |= ((IXGBE_RX_HDR_SIZE <<
 941                             IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
 942                            IXGBE_SRRCTL_BSIZEHDR_MASK);
 943         } else {
 944                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
 945
 946                 if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
 947                         srrctl |=
 948                              IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 949                 else
 950                         srrctl |=
 951                              adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 952         }
 953         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);
 954
 955         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
 956         /* disable receives while setting up the descriptors */
 957         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
 958         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
 959
 960         /* Setup the HW Rx Head and Tail Descriptor Pointers and
 961          * the Base and Length of the Rx Descriptor Ring */
 962         for (i = 0; i < adapter->num_rx_queues; i++) {
 963                 rdba = adapter->rx_ring[i].dma;
 964                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
 965                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
 966                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
 967                 IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
 968                 IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
 969                 adapter->rx_ring[i].head = IXGBE_RDH(i);
 970                 adapter->rx_ring[i].tail = IXGBE_RDT(i);
 971         }
 972
 973         if (adapter->num_rx_queues > 1) {
 974                 /* Random 40bytes used as random key in RSS hash function */
 975                 get_random_bytes(&random[0], 40);
 976
 977                 switch (adapter->num_rx_queues) {
 978                 case 8:
 979                 case 4:
 980                         /* Bits [3:0] in each byte refers the Rx queue no */
 981                         reta = 0x00010203;
 982                         break;
 983                 case 2:
 984                         reta = 0x00010001;
 985                         break;
 986                 default:
 987                         reta = 0x00000000;
 988                         break;
 989                 }
 990
 991                 /* Fill out redirection table */
 992                 for (i = 0; i < 32; i++) {
 993                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i, reta);
 994                         if (adapter->num_rx_queues > 4) {
 995                                 i++;
 996                                 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i,
 997                                                       0x04050607);
 998                         }
 999                 }
1000
1001                 /* Fill out hash function seeds */
1002                 for (i = 0; i < 10; i++)
1003                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RSSRK(0), i, random[i]);
1004
1005                 mrqc = IXGBE_MRQC_RSSEN
1006                     /* Perform hash on these packet types */
1007                     | IXGBE_MRQC_RSS_FIELD_IPV4
1008                     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1009                     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1010                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1011                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1012                     | IXGBE_MRQC_RSS_FIELD_IPV6
1013                     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1014                     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1015                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1016                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1017
1018                 /* Multiqueue and packet checksumming are mutually exclusive. */
1019                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1020                 rxcsum |= IXGBE_RXCSUM_PCSD;
1021                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1022         } else {
1023                 /* Enable Receive Checksum Offload for TCP and UDP */
1024                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1025                 if (adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1026                         /* Enable IPv4 payload checksum for UDP fragments
1027                          * Must be used in conjunction with packet-split. */
1028                         rxcsum |= IXGBE_RXCSUM_IPPCSE;
1029                 } else {
1030                         /* don't need to clear IPPCSE as it defaults to 0 */
1031                 }
1032                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1033         }
1034         /* Enable Receives */
1035         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
1036         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1037 }
1038
1039 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1040                                    struct vlan_group *grp)
1041 {
1042         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1043         u32 ctrl;
1044
1045         ixgbe_irq_disable(adapter);
1046         adapter->vlgrp = grp;
1047
1048         if (grp) {
1049                 /* enable VLAN tag insert/strip */
1050                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1051                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
1052                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1053                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1054         }
1055
1056         ixgbe_irq_enable(adapter);
1057 }
1058
1059 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1060 {
1061         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1062
1063         /* add VID to filter table */
1064         ixgbe_set_vfta(&adapter->hw, vid, 0, true);
1065 }
1066
1067 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1068 {
1069         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1070
1071         ixgbe_irq_disable(adapter);
1072         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1073         ixgbe_irq_enable(adapter);
1074
1075         /* remove VID from filter table */
1076         ixgbe_set_vfta(&adapter->hw, vid, 0, false);
1077 }
1078
1079 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1080 {
1081         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1082
1083         if (adapter->vlgrp) {
1084                 u16 vid;
1085                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1086                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1087                                 continue;
1088                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1089                 }
1090         }
1091 }
1092
1093 /**
1094  * ixgbe_set_multi - Multicast and Promiscuous mode set
1095  * @netdev: network interface device structure
1096  *
1097  * The set_multi entry point is called whenever the multicast address
1098  * list or the network interface flags are updated.  This routine is
1099  * responsible for configuring the hardware for proper multicast,
1100  * promiscuous mode, and all-multi behavior.
1101  **/
1102 static void ixgbe_set_multi(struct net_device *netdev)
1103 {
1104         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1105         struct ixgbe_hw *hw = &adapter->hw;
1106         struct dev_mc_list *mc_ptr;
1107         u8 *mta_list;
1108         u32 fctrl;
1109         int i;
1110
1111         /* Check for Promiscuous and All Multicast modes */
1112
1113         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1114
1115         if (netdev->flags & IFF_PROMISC) {
1116                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1117         } else if (netdev->flags & IFF_ALLMULTI) {
1118                 fctrl |= IXGBE_FCTRL_MPE;
1119                 fctrl &= ~IXGBE_FCTRL_UPE;
1120         } else {
1121                 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1122         }
1123
1124         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1125
1126         if (netdev->mc_count) {
1127                 mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
1128                 if (!mta_list)
1129                         return;
1130
1131                 /* Shared function expects packed array of only addresses. */
1132                 mc_ptr = netdev->mc_list;
1133
1134                 for (i = 0; i < netdev->mc_count; i++) {
1135                         if (!mc_ptr)
1136                                 break;
1137                         memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
1138                                ETH_ALEN);
1139                         mc_ptr = mc_ptr->next;
1140                 }
1141
1142                 ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
1143                 kfree(mta_list);
1144         } else {
1145                 ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
1146         }
1147
1148 }
1149
1150 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1151 {
1152         struct net_device *netdev = adapter->netdev;
1153         int i;
1154
1155         ixgbe_set_multi(netdev);
1156
1157         ixgbe_restore_vlan(adapter);
1158
1159         ixgbe_configure_tx(adapter);
1160         ixgbe_configure_rx(adapter);
1161         for (i = 0; i < adapter->num_rx_queues; i++)
1162                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1163                                            (adapter->rx_ring[i].count - 1));
1164 }
1165
1166 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1167 {
1168         struct net_device *netdev = adapter->netdev;
1169         int i;
1170         u32 gpie = 0;
1171         struct ixgbe_hw *hw = &adapter->hw;
1172         u32 txdctl, rxdctl, mhadd;
1173         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1174
1175         if (adapter->flags & (IXGBE_FLAG_MSIX_ENABLED |
1176                               IXGBE_FLAG_MSI_ENABLED)) {
1177                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1178                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1179                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1180                 } else {
1181                         /* MSI only */
1182                         gpie = (IXGBE_GPIE_EIAME |
1183                                 IXGBE_GPIE_PBA_SUPPORT);
1184                 }
1185                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_GPIE, gpie);
1186                 gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);
1187         }
1188
1189         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1190
1191         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1192                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1193                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1194
1195                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1196         }
1197
1198         for (i = 0; i < adapter->num_tx_queues; i++) {
1199                 txdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_TXDCTL(i));
1200                 txdctl |= IXGBE_TXDCTL_ENABLE;
1201                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_TXDCTL(i), txdctl);
1202         }
1203
1204         for (i = 0; i < adapter->num_rx_queues; i++) {
1205                 rxdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(i));
1206                 rxdctl |= IXGBE_RXDCTL_ENABLE;
1207                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(i), rxdctl);
1208         }
1209         /* enable all receives */
1210         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1211         rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1212         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1213
1214         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1215                 ixgbe_configure_msix(adapter);
1216         else
1217                 ixgbe_configure_msi_and_legacy(adapter);
1218
1219         clear_bit(__IXGBE_DOWN, &adapter->state);
1220         napi_enable(&adapter->napi);
1221         ixgbe_irq_enable(adapter);
1222
1223         /* bring the link up in the watchdog, this could race with our first
1224          * link up interrupt but shouldn't be a problem */
1225         mod_timer(&adapter->watchdog_timer, jiffies);
1226         return 0;
1227 }
1228
1229 int ixgbe_up(struct ixgbe_adapter *adapter)
1230 {
1231         /* hardware has been reset, we need to reload some things */
1232         ixgbe_configure(adapter);
1233
1234         return ixgbe_up_complete(adapter);
1235 }
1236
1237 void ixgbe_reset(struct ixgbe_adapter *adapter)
1238 {
1239         if (ixgbe_init_hw(&adapter->hw))
1240                 DPRINTK(PROBE, ERR, "Hardware Error\n");
1241
1242         /* reprogram the RAR[0] in case user changed it. */
1243         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
1244
1245 }
1246
1247 #ifdef CONFIG_PM
1248 static int ixgbe_resume(struct pci_dev *pdev)
1249 {
1250         struct net_device *netdev = pci_get_drvdata(pdev);
1251         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1252         u32 err, num_rx_queues = adapter->num_rx_queues;
1253
1254         pci_set_power_state(pdev, PCI_D0);
1255         pci_restore_state(pdev);
1256         err = pci_enable_device(pdev);
1257         if (err) {
1258                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
1259                                 "suspend\n");
1260                 return err;
1261         }
1262         pci_set_master(pdev);
1263
1264         pci_enable_wake(pdev, PCI_D3hot, 0);
1265         pci_enable_wake(pdev, PCI_D3cold, 0);
1266
1267         if (netif_running(netdev)) {
1268                 err = ixgbe_request_irq(adapter, &num_rx_queues);
1269                 if (err)
1270                         return err;
1271         }
1272
1273         ixgbe_reset(adapter);
1274
1275         if (netif_running(netdev))
1276                 ixgbe_up(adapter);
1277
1278         netif_device_attach(netdev);
1279
1280         return 0;
1281 }
1282 #endif
1283
1284 /**
1285  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
1286  * @adapter: board private structure
1287  * @rx_ring: ring to free buffers from
1288  **/
1289 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
1290                                 struct ixgbe_ring *rx_ring)
1291 {
1292         struct pci_dev *pdev = adapter->pdev;
1293         unsigned long size;
1294         unsigned int i;
1295
1296         /* Free all the Rx ring sk_buffs */
1297
1298         for (i = 0; i < rx_ring->count; i++) {
1299                 struct ixgbe_rx_buffer *rx_buffer_info;
1300
1301                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1302                 if (rx_buffer_info->dma) {
1303                         pci_unmap_single(pdev, rx_buffer_info->dma,
1304                                          adapter->rx_buf_len,
1305                                          PCI_DMA_FROMDEVICE);
1306                         rx_buffer_info->dma = 0;
1307                 }
1308                 if (rx_buffer_info->skb) {
1309                         dev_kfree_skb(rx_buffer_info->skb);
1310                         rx_buffer_info->skb = NULL;
1311                 }
1312                 if (!rx_buffer_info->page)
1313                         continue;
1314                 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
1315                                PCI_DMA_FROMDEVICE);
1316                 rx_buffer_info->page_dma = 0;
1317
1318                 put_page(rx_buffer_info->page);
1319                 rx_buffer_info->page = NULL;
1320         }
1321
1322         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
1323         memset(rx_ring->rx_buffer_info, 0, size);
1324
1325         /* Zero out the descriptor ring */
1326         memset(rx_ring->desc, 0, rx_ring->size);
1327
1328         rx_ring->next_to_clean = 0;
1329         rx_ring->next_to_use = 0;
1330
1331         writel(0, adapter->hw.hw_addr + rx_ring->head);
1332         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1333 }
1334
1335 /**
1336  * ixgbe_clean_tx_ring - Free Tx Buffers
1337  * @adapter: board private structure
1338  * @tx_ring: ring to be cleaned
1339  **/
1340 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
1341                                 struct ixgbe_ring *tx_ring)
1342 {
1343         struct ixgbe_tx_buffer *tx_buffer_info;
1344         unsigned long size;
1345         unsigned int i;
1346
1347         /* Free all the Tx ring sk_buffs */
1348
1349         for (i = 0; i < tx_ring->count; i++) {
1350                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1351                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1352         }
1353
1354         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
1355         memset(tx_ring->tx_buffer_info, 0, size);
1356
1357         /* Zero out the descriptor ring */
1358         memset(tx_ring->desc, 0, tx_ring->size);
1359
1360         tx_ring->next_to_use = 0;
1361         tx_ring->next_to_clean = 0;
1362
1363         writel(0, adapter->hw.hw_addr + tx_ring->head);
1364         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1365 }
1366
1367 /**
1368  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
1369  * @adapter: board private structure
1370  **/
1371 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
1372 {
1373         int i;
1374
1375         for (i = 0; i < adapter->num_tx_queues; i++)
1376                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1377 }
1378
1379 /**
1380  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
1381  * @adapter: board private structure
1382  **/
1383 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
1384 {
1385         int i;
1386
1387         for (i = 0; i < adapter->num_rx_queues; i++)
1388                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1389 }
1390
1391 void ixgbe_down(struct ixgbe_adapter *adapter)
1392 {
1393         struct net_device *netdev = adapter->netdev;
1394         u32 rxctrl;
1395
1396         /* signal that we are down to the interrupt handler */
1397         set_bit(__IXGBE_DOWN, &adapter->state);
1398
1399         /* disable receives */
1400         rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
1401         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
1402                         rxctrl & ~IXGBE_RXCTRL_RXEN);
1403
1404         netif_tx_disable(netdev);
1405
1406         /* disable transmits in the hardware */
1407
1408         /* flush both disables */
1409         IXGBE_WRITE_FLUSH(&adapter->hw);
1410         msleep(10);
1411
1412         napi_disable(&adapter->napi);
1413         atomic_set(&adapter->irq_sem, 0);
1414
1415         ixgbe_irq_disable(adapter);
1416
1417         del_timer_sync(&adapter->watchdog_timer);
1418
1419         netif_carrier_off(netdev);
1420         netif_stop_queue(netdev);
1421
1422         ixgbe_reset(adapter);
1423         ixgbe_clean_all_tx_rings(adapter);
1424         ixgbe_clean_all_rx_rings(adapter);
1425
1426 }
1427
1428 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
1429 {
1430         struct net_device *netdev = pci_get_drvdata(pdev);
1431         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1432 #ifdef CONFIG_PM
1433         int retval = 0;
1434 #endif
1435
1436         netif_device_detach(netdev);
1437
1438         if (netif_running(netdev)) {
1439                 ixgbe_down(adapter);
1440                 ixgbe_free_irq(adapter);
1441         }
1442
1443 #ifdef CONFIG_PM
1444         retval = pci_save_state(pdev);
1445         if (retval)
1446                 return retval;
1447 #endif
1448
1449         pci_enable_wake(pdev, PCI_D3hot, 0);
1450         pci_enable_wake(pdev, PCI_D3cold, 0);
1451
1452         pci_disable_device(pdev);
1453
1454         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1455
1456         return 0;
1457 }
1458
1459 static void ixgbe_shutdown(struct pci_dev *pdev)
1460 {
1461         ixgbe_suspend(pdev, PMSG_SUSPEND);
1462 }
1463
1464 /**
1465  * ixgbe_clean - NAPI Rx polling callback
1466  * @adapter: board private structure
1467  **/
1468 static int ixgbe_clean(struct napi_struct *napi, int budget)
1469 {
1470         struct ixgbe_adapter *adapter = container_of(napi,
1471                                         struct ixgbe_adapter, napi);
1472         struct net_device *netdev = adapter->netdev;
1473         int tx_cleaned = 0, work_done = 0;
1474
1475         /* In non-MSIX case, there is no multi-Tx/Rx queue */
1476         tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
1477         ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
1478                            budget);
1479
1480         if (tx_cleaned)
1481                 work_done = budget;
1482
1483         /* If budget not fully consumed, exit the polling mode */
1484         if (work_done < budget) {
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_NETDEV_DEV(netdev, &pdev->dev);
2552
2553         pci_set_drvdata(pdev, netdev);
2554         adapter = netdev_priv(netdev);
2555
2556         adapter->netdev = netdev;
2557         adapter->pdev = pdev;
2558         hw = &adapter->hw;
2559         hw->back = adapter;
2560         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2561
2562         mmio_start = pci_resource_start(pdev, 0);
2563         mmio_len = pci_resource_len(pdev, 0);
2564
2565         hw->hw_addr = ioremap(mmio_start, mmio_len);
2566         if (!hw->hw_addr) {
2567                 err = -EIO;
2568                 goto err_ioremap;
2569         }
2570
2571         for (i = 1; i <= 5; i++) {
2572                 if (pci_resource_len(pdev, i) == 0)
2573                         continue;
2574         }
2575
2576         netdev->open = &ixgbe_open;
2577         netdev->stop = &ixgbe_close;
2578         netdev->hard_start_xmit = &ixgbe_xmit_frame;
2579         netdev->get_stats = &ixgbe_get_stats;
2580         netdev->set_multicast_list = &ixgbe_set_multi;
2581         netdev->set_mac_address = &ixgbe_set_mac;
2582         netdev->change_mtu = &ixgbe_change_mtu;
2583         ixgbe_set_ethtool_ops(netdev);
2584         netdev->tx_timeout = &ixgbe_tx_timeout;
2585         netdev->watchdog_timeo = 5 * HZ;
2586         netif_napi_add(netdev, &adapter->napi, ixgbe_clean, 64);
2587         netdev->vlan_rx_register = ixgbe_vlan_rx_register;
2588         netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
2589         netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
2590 #ifdef CONFIG_NET_POLL_CONTROLLER
2591         netdev->poll_controller = ixgbe_netpoll;
2592 #endif
2593         strcpy(netdev->name, pci_name(pdev));
2594
2595         netdev->mem_start = mmio_start;
2596         netdev->mem_end = mmio_start + mmio_len;
2597
2598         adapter->bd_number = cards_found;
2599
2600         /* PCI config space info */
2601         hw->vendor_id = pdev->vendor;
2602         hw->device_id = pdev->device;
2603         hw->revision_id = pdev->revision;
2604         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2605         hw->subsystem_device_id = pdev->subsystem_device;
2606
2607         /* Setup hw api */
2608         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
2609         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
2610
2611         err = ii->get_invariants(hw);
2612         if (err)
2613                 goto err_hw_init;
2614
2615         /* setup the private structure */
2616         err = ixgbe_sw_init(adapter);
2617         if (err)
2618                 goto err_sw_init;
2619
2620         netdev->features = NETIF_F_SG |
2621                            NETIF_F_HW_CSUM |
2622                            NETIF_F_HW_VLAN_TX |
2623                            NETIF_F_HW_VLAN_RX |
2624                            NETIF_F_HW_VLAN_FILTER;
2625
2626         netdev->features |= NETIF_F_TSO;
2627
2628         netdev->features |= NETIF_F_TSO6;
2629         if (pci_using_dac)
2630                 netdev->features |= NETIF_F_HIGHDMA;
2631
2632
2633         /* make sure the EEPROM is good */
2634         if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
2635                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
2636                 err = -EIO;
2637                 goto err_eeprom;
2638         }
2639
2640         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
2641         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
2642
2643         if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
2644                 err = -EIO;
2645                 goto err_eeprom;
2646         }
2647
2648         init_timer(&adapter->watchdog_timer);
2649         adapter->watchdog_timer.function = &ixgbe_watchdog;
2650         adapter->watchdog_timer.data = (unsigned long)adapter;
2651
2652         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
2653
2654         /* initialize default flow control settings */
2655         hw->fc.original_type = ixgbe_fc_full;
2656         hw->fc.type = ixgbe_fc_full;
2657         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2658         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2659         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2660
2661         /* Interrupt Throttle Rate */
2662         adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
2663         adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);
2664
2665         /* print bus type/speed/width info */
2666         pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
2667         link_speed = link_status & IXGBE_PCI_LINK_SPEED;
2668         link_width = link_status & IXGBE_PCI_LINK_WIDTH;
2669         dev_info(&pdev->dev, "(PCI Express:%s:%s) "
2670                  "%02x:%02x:%02x:%02x:%02x:%02x\n",
2671                 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
2672                  (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
2673                  "Unknown"),
2674                 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
2675                  (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
2676                  (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
2677                  (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
2678                  "Unknown"),
2679                 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
2680                 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
2681         ixgbe_read_part_num(hw, &part_num);
2682         dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
2683                  hw->mac.type, hw->phy.type,
2684                  (part_num >> 8), (part_num & 0xff));
2685
2686         /* reset the hardware with the new settings */
2687         ixgbe_start_hw(hw);
2688
2689         netif_carrier_off(netdev);
2690         netif_stop_queue(netdev);
2691
2692         strcpy(netdev->name, "eth%d");
2693         err = register_netdev(netdev);
2694         if (err)
2695                 goto err_register;
2696
2697
2698         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
2699         cards_found++;
2700         return 0;
2701
2702 err_register:
2703 err_hw_init:
2704 err_sw_init:
2705 err_eeprom:
2706         iounmap(hw->hw_addr);
2707 err_ioremap:
2708         free_netdev(netdev);
2709 err_alloc_etherdev:
2710         pci_release_regions(pdev);
2711 err_pci_reg:
2712 err_dma:
2713         pci_disable_device(pdev);
2714         return err;
2715 }
2716
2717 /**
2718  * ixgbe_remove - Device Removal Routine
2719  * @pdev: PCI device information struct
2720  *
2721  * ixgbe_remove is called by the PCI subsystem to alert the driver
2722  * that it should release a PCI device.  The could be caused by a
2723  * Hot-Plug event, or because the driver is going to be removed from
2724  * memory.
2725  **/
2726 static void __devexit ixgbe_remove(struct pci_dev *pdev)
2727 {
2728         struct net_device *netdev = pci_get_drvdata(pdev);
2729         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2730
2731         set_bit(__IXGBE_DOWN, &adapter->state);
2732         del_timer_sync(&adapter->watchdog_timer);
2733
2734         flush_scheduled_work();
2735
2736         unregister_netdev(netdev);
2737
2738         kfree(adapter->tx_ring);
2739         kfree(adapter->rx_ring);
2740
2741         iounmap(adapter->hw.hw_addr);
2742         pci_release_regions(pdev);
2743
2744         free_netdev(netdev);
2745
2746         pci_disable_device(pdev);
2747 }
2748
2749 /**
2750  * ixgbe_io_error_detected - called when PCI error is detected
2751  * @pdev: Pointer to PCI device
2752  * @state: The current pci connection state
2753  *
2754  * This function is called after a PCI bus error affecting
2755  * this device has been detected.
2756  */
2757 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
2758                                                 pci_channel_state_t state)
2759 {
2760         struct net_device *netdev = pci_get_drvdata(pdev);
2761         struct ixgbe_adapter *adapter = netdev->priv;
2762
2763         netif_device_detach(netdev);
2764
2765         if (netif_running(netdev))
2766                 ixgbe_down(adapter);
2767         pci_disable_device(pdev);
2768
2769         /* Request a slot slot reset. */
2770         return PCI_ERS_RESULT_NEED_RESET;
2771 }
2772
2773 /**
2774  * ixgbe_io_slot_reset - called after the pci bus has been reset.
2775  * @pdev: Pointer to PCI device
2776  *
2777  * Restart the card from scratch, as if from a cold-boot.
2778  */
2779 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
2780 {
2781         struct net_device *netdev = pci_get_drvdata(pdev);
2782         struct ixgbe_adapter *adapter = netdev->priv;
2783
2784         if (pci_enable_device(pdev)) {
2785                 DPRINTK(PROBE, ERR,
2786                         "Cannot re-enable PCI device after reset.\n");
2787                 return PCI_ERS_RESULT_DISCONNECT;
2788         }
2789         pci_set_master(pdev);
2790
2791         pci_enable_wake(pdev, PCI_D3hot, 0);
2792         pci_enable_wake(pdev, PCI_D3cold, 0);
2793
2794         ixgbe_reset(adapter);
2795
2796         return PCI_ERS_RESULT_RECOVERED;
2797 }
2798
2799 /**
2800  * ixgbe_io_resume - called when traffic can start flowing again.
2801  * @pdev: Pointer to PCI device
2802  *
2803  * This callback is called when the error recovery driver tells us that
2804  * its OK to resume normal operation.
2805  */
2806 static void ixgbe_io_resume(struct pci_dev *pdev)
2807 {
2808         struct net_device *netdev = pci_get_drvdata(pdev);
2809         struct ixgbe_adapter *adapter = netdev->priv;
2810
2811         if (netif_running(netdev)) {
2812                 if (ixgbe_up(adapter)) {
2813                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
2814                         return;
2815                 }
2816         }
2817
2818         netif_device_attach(netdev);
2819
2820 }
2821
2822 static struct pci_error_handlers ixgbe_err_handler = {
2823         .error_detected = ixgbe_io_error_detected,
2824         .slot_reset = ixgbe_io_slot_reset,
2825         .resume = ixgbe_io_resume,
2826 };
2827
2828 static struct pci_driver ixgbe_driver = {
2829         .name     = ixgbe_driver_name,
2830         .id_table = ixgbe_pci_tbl,
2831         .probe    = ixgbe_probe,
2832         .remove   = __devexit_p(ixgbe_remove),
2833 #ifdef CONFIG_PM
2834         .suspend  = ixgbe_suspend,
2835         .resume   = ixgbe_resume,
2836 #endif
2837         .shutdown = ixgbe_shutdown,
2838         .err_handler = &ixgbe_err_handler
2839 };
2840
2841 /**
2842  * ixgbe_init_module - Driver Registration Routine
2843  *
2844  * ixgbe_init_module is the first routine called when the driver is
2845  * loaded. All it does is register with the PCI subsystem.
2846  **/
2847 static int __init ixgbe_init_module(void)
2848 {
2849         int ret;
2850         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
2851                ixgbe_driver_string, ixgbe_driver_version);
2852
2853         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
2854
2855         ret = pci_register_driver(&ixgbe_driver);
2856         return ret;
2857 }
2858 module_init(ixgbe_init_module);
2859
2860 /**
2861  * ixgbe_exit_module - Driver Exit Cleanup Routine
2862  *
2863  * ixgbe_exit_module is called just before the driver is removed
2864  * from memory.
2865  **/
2866 static void __exit ixgbe_exit_module(void)
2867 {
2868         pci_unregister_driver(&ixgbe_driver);
2869 }
2870 module_exit(ixgbe_exit_module);
2871
2872 /* ixgbe_main.c */