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   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2007 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #include <net/checksum.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/if_vlan.h>
  43
  44 #include "ixgbe.h"
  45 #include "ixgbe_common.h"
  46
  47 char ixgbe_driver_name[] = "ixgbe";
  48 static const char ixgbe_driver_string[] =
  49         "Intel(R) 10 Gigabit PCI Express Network Driver";
  50
  51 #define DRV_VERSION "1.1.18"
  52 const char ixgbe_driver_version[] = DRV_VERSION;
  53 static const char ixgbe_copyright[] =
  54          "Copyright (c) 1999-2007 Intel Corporation.";
  55
  56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  57         [board_82598]                   = &ixgbe_82598_info,
  58 };
  59
  60 /* ixgbe_pci_tbl - PCI Device ID Table
  61  *
  62  * Wildcard entries (PCI_ANY_ID) should come last
  63  * Last entry must be all 0s
  64  *
  65  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  66  *   Class, Class Mask, private data (not used) }
  67  */
  68 static struct pci_device_id ixgbe_pci_tbl[] = {
  69         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  70          board_82598 },
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  72          board_82598 },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
  74          board_82598 },
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  76          board_82598 },
  77
  78         /* required last entry */
  79         {0, }
  80 };
  81 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
  82
  83 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  84 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
  85 MODULE_LICENSE("GPL");
  86 MODULE_VERSION(DRV_VERSION);
  87
  88 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  89
  90 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
  91 {
  92         u32 ctrl_ext;
  93
  94         /* Let firmware take over control of h/w */
  95         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
  96         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
  97                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
  98 }
  99
 100 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 101 {
 102         u32 ctrl_ext;
 103
 104         /* Let firmware know the driver has taken over */
 105         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 106         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 107                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 108 }
 109
 110 #ifdef DEBUG
 111 /**
 112  * ixgbe_get_hw_dev_name - return device name string
 113  * used by hardware layer to print debugging information
 114  **/
 115 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
 116 {
 117         struct ixgbe_adapter *adapter = hw->back;
 118         struct net_device *netdev = adapter->netdev;
 119         return netdev->name;
 120 }
 121 #endif
 122
 123 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
 124                            u8 msix_vector)
 125 {
 126         u32 ivar, index;
 127
 128         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 129         index = (int_alloc_entry >> 2) & 0x1F;
 130         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
 131         ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
 132         ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
 133         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
 134 }
 135
 136 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 137                                              struct ixgbe_tx_buffer
 138                                              *tx_buffer_info)
 139 {
 140         if (tx_buffer_info->dma) {
 141                 pci_unmap_page(adapter->pdev,
 142                                tx_buffer_info->dma,
 143                                tx_buffer_info->length, PCI_DMA_TODEVICE);
 144                 tx_buffer_info->dma = 0;
 145         }
 146         if (tx_buffer_info->skb) {
 147                 dev_kfree_skb_any(tx_buffer_info->skb);
 148                 tx_buffer_info->skb = NULL;
 149         }
 150         /* tx_buffer_info must be completely set up in the transmit path */
 151 }
 152
 153 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 154                                        struct ixgbe_ring *tx_ring,
 155                                        unsigned int eop,
 156                                        union ixgbe_adv_tx_desc *eop_desc)
 157 {
 158         /* Detect a transmit hang in hardware, this serializes the
 159          * check with the clearing of time_stamp and movement of i */
 160         adapter->detect_tx_hung = false;
 161         if (tx_ring->tx_buffer_info[eop].dma &&
 162             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 163             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 164                 /* detected Tx unit hang */
 165                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 166                         "  TDH                  <%x>\n"
 167                         "  TDT                  <%x>\n"
 168                         "  next_to_use          <%x>\n"
 169                         "  next_to_clean        <%x>\n"
 170                         "tx_buffer_info[next_to_clean]\n"
 171                         "  time_stamp           <%lx>\n"
 172                         "  next_to_watch        <%x>\n"
 173                         "  jiffies              <%lx>\n"
 174                         "  next_to_watch.status <%x>\n",
 175                         readl(adapter->hw.hw_addr + tx_ring->head),
 176                         readl(adapter->hw.hw_addr + tx_ring->tail),
 177                         tx_ring->next_to_use,
 178                         tx_ring->next_to_clean,
 179                         tx_ring->tx_buffer_info[eop].time_stamp,
 180                         eop, jiffies, eop_desc->wb.status);
 181                 return true;
 182         }
 183
 184         return false;
 185 }
 186
 187 #define IXGBE_MAX_TXD_PWR       14
 188 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 189
 190 /* Tx Descriptors needed, worst case */
 191 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 192                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 193 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 194         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)   /* for context */
 195
 196 /**
 197  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 198  * @adapter: board private structure
 199  **/
 200 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 201                                     struct ixgbe_ring *tx_ring)
 202 {
 203         struct net_device *netdev = adapter->netdev;
 204         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 205         struct ixgbe_tx_buffer *tx_buffer_info;
 206         unsigned int i, eop;
 207         bool cleaned = false;
 208         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 209
 210         i = tx_ring->next_to_clean;
 211         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 212         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 213         while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
 214                 cleaned = false;
 215                 while (!cleaned) {
 216                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 217                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 218                         cleaned = (i == eop);
 219
 220                         tx_ring->stats.bytes += tx_buffer_info->length;
 221                         if (cleaned) {
 222                                 struct sk_buff *skb = tx_buffer_info->skb;
 223                                 unsigned int segs, bytecount;
 224                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 225                                 /* multiply data chunks by size of headers */
 226                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 227                                             skb->len;
 228                                 total_tx_packets += segs;
 229                                 total_tx_bytes += bytecount;
 230                         }
 231                         ixgbe_unmap_and_free_tx_resource(adapter,
 232                                                          tx_buffer_info);
 233                         tx_desc->wb.status = 0;
 234
 235                         i++;
 236                         if (i == tx_ring->count)
 237                                 i = 0;
 238                 }
 239
 240                 tx_ring->stats.packets++;
 241
 242                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 243                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 244
 245                 /* weight of a sort for tx, avoid endless transmit cleanup */
 246                 if (total_tx_packets >= tx_ring->work_limit)
 247                         break;
 248         }
 249
 250         tx_ring->next_to_clean = i;
 251
 252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 253         if (total_tx_packets && netif_carrier_ok(netdev) &&
 254             (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
 255                 /* Make sure that anybody stopping the queue after this
 256                  * sees the new next_to_clean.
 257                  */
 258                 smp_mb();
 259                 if (netif_queue_stopped(netdev) &&
 260                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 261                         netif_wake_queue(netdev);
 262                         adapter->restart_queue++;
 263                 }
 264         }
 265
 266         if (adapter->detect_tx_hung)
 267                 if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
 268                         netif_stop_queue(netdev);
 269
 270         if (total_tx_packets >= tx_ring->work_limit)
 271                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
 272
 273         adapter->net_stats.tx_bytes += total_tx_bytes;
 274         adapter->net_stats.tx_packets += total_tx_packets;
 275         cleaned = total_tx_packets ? true : false;
 276         return cleaned;
 277 }
 278
 279 /**
 280  * ixgbe_receive_skb - Send a completed packet up the stack
 281  * @adapter: board private structure
 282  * @skb: packet to send up
 283  * @is_vlan: packet has a VLAN tag
 284  * @tag: VLAN tag from descriptor
 285  **/
 286 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
 287                               struct sk_buff *skb, bool is_vlan,
 288                               u16 tag)
 289 {
 290         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 291                 if (adapter->vlgrp && is_vlan)
 292                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
 293                 else
 294                         netif_receive_skb(skb);
 295         } else {
 296
 297                 if (adapter->vlgrp && is_vlan)
 298                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 299                 else
 300                         netif_rx(skb);
 301         }
 302 }
 303
 304 /**
 305  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 306  * @adapter: address of board private structure
 307  * @status_err: hardware indication of status of receive
 308  * @skb: skb currently being received and modified
 309  **/
 310 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 311                                          u32 status_err,
 312                                          struct sk_buff *skb)
 313 {
 314         skb->ip_summed = CHECKSUM_NONE;
 315
 316         /* Ignore Checksum bit is set, or rx csum disabled */
 317         if ((status_err & IXGBE_RXD_STAT_IXSM) ||
 318             !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 319                 return;
 320
 321         /* if IP and error */
 322         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 323             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 324                 adapter->hw_csum_rx_error++;
 325                 return;
 326         }
 327
 328         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 329                 return;
 330
 331         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 332                 adapter->hw_csum_rx_error++;
 333                 return;
 334         }
 335
 336         /* It must be a TCP or UDP packet with a valid checksum */
 337         skb->ip_summed = CHECKSUM_UNNECESSARY;
 338         adapter->hw_csum_rx_good++;
 339 }
 340
 341 /**
 342  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 343  * @adapter: address of board private structure
 344  **/
 345 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 346                                        struct ixgbe_ring *rx_ring,
 347                                        int cleaned_count)
 348 {
 349         struct net_device *netdev = adapter->netdev;
 350         struct pci_dev *pdev = adapter->pdev;
 351         union ixgbe_adv_rx_desc *rx_desc;
 352         struct ixgbe_rx_buffer *rx_buffer_info;
 353         struct sk_buff *skb;
 354         unsigned int i;
 355         unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 356
 357         i = rx_ring->next_to_use;
 358         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 359
 360         while (cleaned_count--) {
 361                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 362
 363                 if (!rx_buffer_info->page &&
 364                                 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 365                         rx_buffer_info->page = alloc_page(GFP_ATOMIC);
 366                         if (!rx_buffer_info->page) {
 367                                 adapter->alloc_rx_page_failed++;
 368                                 goto no_buffers;
 369                         }
 370                         rx_buffer_info->page_dma =
 371                             pci_map_page(pdev, rx_buffer_info->page,
 372                                          0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 373                 }
 374
 375                 if (!rx_buffer_info->skb) {
 376                         skb = netdev_alloc_skb(netdev, bufsz);
 377
 378                         if (!skb) {
 379                                 adapter->alloc_rx_buff_failed++;
 380                                 goto no_buffers;
 381                         }
 382
 383                         /*
 384                          * Make buffer alignment 2 beyond a 16 byte boundary
 385                          * this will result in a 16 byte aligned IP header after
 386                          * the 14 byte MAC header is removed
 387                          */
 388                         skb_reserve(skb, NET_IP_ALIGN);
 389
 390                         rx_buffer_info->skb = skb;
 391                         rx_buffer_info->dma = pci_map_single(pdev, skb->data,
 392                                                           bufsz,
 393                                                           PCI_DMA_FROMDEVICE);
 394                 }
 395                 /* Refresh the desc even if buffer_addrs didn't change because
 396                  * each write-back erases this info. */
 397                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 398                         rx_desc->read.pkt_addr =
 399                             cpu_to_le64(rx_buffer_info->page_dma);
 400                         rx_desc->read.hdr_addr =
 401                                         cpu_to_le64(rx_buffer_info->dma);
 402                 } else {
 403                         rx_desc->read.pkt_addr =
 404                                         cpu_to_le64(rx_buffer_info->dma);
 405                 }
 406
 407                 i++;
 408                 if (i == rx_ring->count)
 409                         i = 0;
 410                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 411         }
 412 no_buffers:
 413         if (rx_ring->next_to_use != i) {
 414                 rx_ring->next_to_use = i;
 415                 if (i-- == 0)
 416                         i = (rx_ring->count - 1);
 417
 418                 /*
 419                  * Force memory writes to complete before letting h/w
 420                  * know there are new descriptors to fetch.  (Only
 421                  * applicable for weak-ordered memory model archs,
 422                  * such as IA-64).
 423                  */
 424                 wmb();
 425                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 426         }
 427 }
 428
 429 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 430                                struct ixgbe_ring *rx_ring,
 431                                int *work_done, int work_to_do)
 432 {
 433         struct net_device *netdev = adapter->netdev;
 434         struct pci_dev *pdev = adapter->pdev;
 435         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 436         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 437         struct sk_buff *skb;
 438         unsigned int i;
 439         u32 upper_len, len, staterr;
 440         u16 hdr_info, vlan_tag;
 441         bool is_vlan, cleaned = false;
 442         int cleaned_count = 0;
 443         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 444
 445         i = rx_ring->next_to_clean;
 446         upper_len = 0;
 447         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 448         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 449         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 450         is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 451         vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 452
 453         while (staterr & IXGBE_RXD_STAT_DD) {
 454                 if (*work_done >= work_to_do)
 455                         break;
 456                 (*work_done)++;
 457
 458                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 459                         hdr_info =
 460                             le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
 461                         len =
 462                             ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 463                              IXGBE_RXDADV_HDRBUFLEN_SHIFT);
 464                         if (hdr_info & IXGBE_RXDADV_SPH)
 465                                 adapter->rx_hdr_split++;
 466                         if (len > IXGBE_RX_HDR_SIZE)
 467                                 len = IXGBE_RX_HDR_SIZE;
 468                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 469                 } else
 470                         len = le16_to_cpu(rx_desc->wb.upper.length);
 471
 472                 cleaned = true;
 473                 skb = rx_buffer_info->skb;
 474                 prefetch(skb->data - NET_IP_ALIGN);
 475                 rx_buffer_info->skb = NULL;
 476
 477                 if (len && !skb_shinfo(skb)->nr_frags) {
 478                         pci_unmap_single(pdev, rx_buffer_info->dma,
 479                                          adapter->rx_buf_len + NET_IP_ALIGN,
 480                                          PCI_DMA_FROMDEVICE);
 481                         skb_put(skb, len);
 482                 }
 483
 484                 if (upper_len) {
 485                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 486                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
 487                         rx_buffer_info->page_dma = 0;
 488                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 489                                            rx_buffer_info->page, 0, upper_len);
 490                         rx_buffer_info->page = NULL;
 491
 492                         skb->len += upper_len;
 493                         skb->data_len += upper_len;
 494                         skb->truesize += upper_len;
 495                 }
 496
 497                 i++;
 498                 if (i == rx_ring->count)
 499                         i = 0;
 500                 next_buffer = &rx_ring->rx_buffer_info[i];
 501
 502                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 503                 prefetch(next_rxd);
 504
 505                 cleaned_count++;
 506                 if (staterr & IXGBE_RXD_STAT_EOP) {
 507                         rx_ring->stats.packets++;
 508                         rx_ring->stats.bytes += skb->len;
 509                 } else {
 510                         rx_buffer_info->skb = next_buffer->skb;
 511                         rx_buffer_info->dma = next_buffer->dma;
 512                         next_buffer->skb = skb;
 513                         adapter->non_eop_descs++;
 514                         goto next_desc;
 515                 }
 516
 517                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 518                         dev_kfree_skb_irq(skb);
 519                         goto next_desc;
 520                 }
 521
 522                 ixgbe_rx_checksum(adapter, staterr, skb);
 523
 524                 /* probably a little skewed due to removing CRC */
 525                 total_rx_bytes += skb->len;
 526                 total_rx_packets++;
 527
 528                 skb->protocol = eth_type_trans(skb, netdev);
 529                 ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
 530                 netdev->last_rx = jiffies;
 531
 532 next_desc:
 533                 rx_desc->wb.upper.status_error = 0;
 534
 535                 /* return some buffers to hardware, one at a time is too slow */
 536                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 537                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 538                         cleaned_count = 0;
 539                 }
 540
 541                 /* use prefetched values */
 542                 rx_desc = next_rxd;
 543                 rx_buffer_info = next_buffer;
 544
 545                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 546                 is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 547                 vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 548         }
 549
 550         rx_ring->next_to_clean = i;
 551         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 552
 553         if (cleaned_count)
 554                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 555
 556         adapter->net_stats.rx_bytes += total_rx_bytes;
 557         adapter->net_stats.rx_packets += total_rx_packets;
 558
 559         return cleaned;
 560 }
 561
 562 #define IXGBE_MAX_INTR 10
 563 /**
 564  * ixgbe_configure_msix - Configure MSI-X hardware
 565  * @adapter: board private structure
 566  *
 567  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 568  * interrupts.
 569  **/
 570 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 571 {
 572         int i, vector = 0;
 573
 574         for (i = 0; i < adapter->num_tx_queues; i++) {
 575                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i),
 576                                IXGBE_MSIX_VECTOR(vector));
 577                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->tx_eitr),
 578                        adapter->hw.hw_addr + adapter->tx_ring[i].itr_register);
 579                 vector++;
 580         }
 581
 582         for (i = 0; i < adapter->num_rx_queues; i++) {
 583                 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(i),
 584                                IXGBE_MSIX_VECTOR(vector));
 585                 writel(EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr),
 586                        adapter->hw.hw_addr + adapter->rx_ring[i].itr_register);
 587                 vector++;
 588         }
 589
 590         vector = adapter->num_tx_queues + adapter->num_rx_queues;
 591         ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX,
 592                        IXGBE_MSIX_VECTOR(vector));
 593         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(vector), 1950);
 594 }
 595
 596 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 597 {
 598         struct net_device *netdev = data;
 599         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 600         struct ixgbe_hw *hw = &adapter->hw;
 601         u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 602
 603         if (eicr & IXGBE_EICR_LSC) {
 604                 adapter->lsc_int++;
 605                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 606                         mod_timer(&adapter->watchdog_timer, jiffies);
 607         }
 608
 609         if (!test_bit(__IXGBE_DOWN, &adapter->state))
 610                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
 611
 612         return IRQ_HANDLED;
 613 }
 614
 615 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 616 {
 617         struct ixgbe_ring *txr = data;
 618         struct ixgbe_adapter *adapter = txr->adapter;
 619
 620         ixgbe_clean_tx_irq(adapter, txr);
 621
 622         return IRQ_HANDLED;
 623 }
 624
 625 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 626 {
 627         struct ixgbe_ring *rxr = data;
 628         struct ixgbe_adapter *adapter = rxr->adapter;
 629
 630         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->eims_value);
 631         netif_rx_schedule(adapter->netdev, &adapter->napi);
 632         return IRQ_HANDLED;
 633 }
 634
 635 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 636 {
 637         struct ixgbe_adapter *adapter = container_of(napi,
 638                                         struct ixgbe_adapter, napi);
 639         struct net_device *netdev = adapter->netdev;
 640         int work_done = 0;
 641         struct ixgbe_ring *rxr = adapter->rx_ring;
 642
 643         /* Keep link state information with original netdev */
 644         if (!netif_carrier_ok(netdev))
 645                 goto quit_polling;
 646
 647         ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
 648
 649         /* If no Tx and not enough Rx work done, exit the polling mode */
 650         if ((work_done < budget) || !netif_running(netdev)) {
 651 quit_polling:
 652                 netif_rx_complete(netdev, napi);
 653                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 654                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 655                                         rxr->eims_value);
 656         }
 657
 658         return work_done;
 659 }
 660
 661 /**
 662  * ixgbe_setup_msix - Initialize MSI-X interrupts
 663  *
 664  * ixgbe_setup_msix allocates MSI-X vectors and requests
 665  * interrutps from the kernel.
 666  **/
 667 static int ixgbe_setup_msix(struct ixgbe_adapter *adapter)
 668 {
 669         struct net_device *netdev = adapter->netdev;
 670         int i, int_vector = 0, err = 0;
 671         int max_msix_count;
 672
 673         /* +1 for the LSC interrupt */
 674         max_msix_count = adapter->num_rx_queues + adapter->num_tx_queues + 1;
 675         adapter->msix_entries = kcalloc(max_msix_count,
 676                                         sizeof(struct msix_entry), GFP_KERNEL);
 677         if (!adapter->msix_entries)
 678                 return -ENOMEM;
 679
 680         for (i = 0; i < max_msix_count; i++)
 681                 adapter->msix_entries[i].entry = i;
 682
 683         err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
 684                               max_msix_count);
 685         if (err)
 686                 goto out;
 687
 688         for (i = 0; i < adapter->num_tx_queues; i++) {
 689                 sprintf(adapter->tx_ring[i].name, "%s-tx%d", netdev->name, i);
 690                 err = request_irq(adapter->msix_entries[int_vector].vector,
 691                                   &ixgbe_msix_clean_tx,
 692                                   0,
 693                                   adapter->tx_ring[i].name,
 694                                   &(adapter->tx_ring[i]));
 695                 if (err) {
 696                         DPRINTK(PROBE, ERR,
 697                                 "request_irq failed for MSIX interrupt "
 698                                 "Error: %d\n", err);
 699                         goto release_irqs;
 700                 }
 701                 adapter->tx_ring[i].eims_value =
 702                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 703                 adapter->tx_ring[i].itr_register = IXGBE_EITR(int_vector);
 704                 int_vector++;
 705         }
 706
 707         for (i = 0; i < adapter->num_rx_queues; i++) {
 708                 if (strlen(netdev->name) < (IFNAMSIZ - 5))
 709                         sprintf(adapter->rx_ring[i].name,
 710                                 "%s-rx%d", netdev->name, i);
 711                 else
 712                         memcpy(adapter->rx_ring[i].name,
 713                                netdev->name, IFNAMSIZ);
 714                 err = request_irq(adapter->msix_entries[int_vector].vector,
 715                                   &ixgbe_msix_clean_rx, 0,
 716                                   adapter->rx_ring[i].name,
 717                                   &(adapter->rx_ring[i]));
 718                 if (err) {
 719                         DPRINTK(PROBE, ERR,
 720                                 "request_irq failed for MSIX interrupt "
 721                                 "Error: %d\n", err);
 722                         goto release_irqs;
 723                 }
 724
 725                 adapter->rx_ring[i].eims_value =
 726                     (1 << IXGBE_MSIX_VECTOR(int_vector));
 727                 adapter->rx_ring[i].itr_register = IXGBE_EITR(int_vector);
 728                 int_vector++;
 729         }
 730
 731         sprintf(adapter->lsc_name, "%s-lsc", netdev->name);
 732         err = request_irq(adapter->msix_entries[int_vector].vector,
 733                           &ixgbe_msix_lsc, 0, adapter->lsc_name, netdev);
 734         if (err) {
 735                 DPRINTK(PROBE, ERR,
 736                         "request_irq for msix_lsc failed: %d\n", err);
 737                 goto release_irqs;
 738         }
 739
 740         /* FIXME: implement netif_napi_remove() instead */
 741         adapter->napi.poll = ixgbe_clean_rxonly;
 742         adapter->flags |= IXGBE_FLAG_MSIX_ENABLED;
 743         return 0;
 744
 745 release_irqs:
 746         int_vector--;
 747         for (; int_vector >= adapter->num_tx_queues; int_vector--)
 748                 free_irq(adapter->msix_entries[int_vector].vector,
 749                          &(adapter->rx_ring[int_vector -
 750                                             adapter->num_tx_queues]));
 751
 752         for (; int_vector >= 0; int_vector--)
 753                 free_irq(adapter->msix_entries[int_vector].vector,
 754                          &(adapter->tx_ring[int_vector]));
 755 out:
 756         kfree(adapter->msix_entries);
 757         adapter->msix_entries = NULL;
 758         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 759         return err;
 760 }
 761
 762 /**
 763  * ixgbe_intr - Interrupt Handler
 764  * @irq: interrupt number
 765  * @data: pointer to a network interface device structure
 766  * @pt_regs: CPU registers structure
 767  **/
 768 static irqreturn_t ixgbe_intr(int irq, void *data)
 769 {
 770         struct net_device *netdev = data;
 771         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 772         struct ixgbe_hw *hw = &adapter->hw;
 773         u32 eicr;
 774
 775         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 776
 777         if (!eicr)
 778                 return IRQ_NONE;        /* Not our interrupt */
 779
 780         if (eicr & IXGBE_EICR_LSC) {
 781                 adapter->lsc_int++;
 782                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 783                         mod_timer(&adapter->watchdog_timer, jiffies);
 784         }
 785         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 786                 /* Disable interrupts and register for poll. The flush of the
 787                  * posted write is intentionally left out. */
 788                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 789                 __netif_rx_schedule(netdev, &adapter->napi);
 790         }
 791
 792         return IRQ_HANDLED;
 793 }
 794
 795 /**
 796  * ixgbe_request_irq - initialize interrupts
 797  * @adapter: board private structure
 798  *
 799  * Attempts to configure interrupts using the best available
 800  * capabilities of the hardware and kernel.
 801  **/
 802 static int ixgbe_request_irq(struct ixgbe_adapter *adapter, u32 *num_rx_queues)
 803 {
 804         struct net_device *netdev = adapter->netdev;
 805         int flags, err;
 806         irq_handler_t handler = ixgbe_intr;
 807
 808         flags = IRQF_SHARED;
 809
 810         err = ixgbe_setup_msix(adapter);
 811         if (!err)
 812                 goto request_done;
 813
 814         /*
 815          * if we can't do MSI-X, fall through and try MSI
 816          * No need to reallocate memory since we're decreasing the number of
 817          * queues. We just won't use the other ones, also it is freed correctly
 818          * on ixgbe_remove.
 819          */
 820         *num_rx_queues = 1;
 821
 822         /* do MSI */
 823         err = pci_enable_msi(adapter->pdev);
 824         if (!err) {
 825                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
 826                 flags &= ~IRQF_SHARED;
 827                 handler = &ixgbe_intr;
 828         }
 829
 830         err = request_irq(adapter->pdev->irq, handler, flags,
 831                           netdev->name, netdev);
 832         if (err)
 833                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
 834
 835 request_done:
 836         return err;
 837 }
 838
 839 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
 840 {
 841         struct net_device *netdev = adapter->netdev;
 842
 843         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
 844                 int i;
 845
 846                 for (i = 0; i < adapter->num_tx_queues; i++)
 847                         free_irq(adapter->msix_entries[i].vector,
 848                                  &(adapter->tx_ring[i]));
 849                 for (i = 0; i < adapter->num_rx_queues; i++)
 850                         free_irq(adapter->msix_entries[i +
 851                                                 adapter->num_tx_queues].vector,
 852                                 &(adapter->rx_ring[i]));
 853                 i = adapter->num_rx_queues + adapter->num_tx_queues;
 854                 free_irq(adapter->msix_entries[i].vector, netdev);
 855                 pci_disable_msix(adapter->pdev);
 856                 kfree(adapter->msix_entries);
 857                 adapter->msix_entries = NULL;
 858                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
 859                 return;
 860         }
 861
 862         free_irq(adapter->pdev->irq, netdev);
 863         if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
 864                 pci_disable_msi(adapter->pdev);
 865                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
 866         }
 867 }
 868
 869 /**
 870  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
 871  * @adapter: board private structure
 872  **/
 873 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
 874 {
 875         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
 876         IXGBE_WRITE_FLUSH(&adapter->hw);
 877         synchronize_irq(adapter->pdev->irq);
 878 }
 879
 880 /**
 881  * ixgbe_irq_enable - Enable default interrupt generation settings
 882  * @adapter: board private structure
 883  **/
 884 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
 885 {
 886         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
 887                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC,
 888                                 (IXGBE_EIMS_ENABLE_MASK &
 889                                  ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC)));
 890         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS,
 891                         IXGBE_EIMS_ENABLE_MASK);
 892         IXGBE_WRITE_FLUSH(&adapter->hw);
 893 }
 894
 895 /**
 896  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
 897  *
 898  **/
 899 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
 900 {
 901         int i;
 902         struct ixgbe_hw *hw = &adapter->hw;
 903
 904         if (adapter->rx_eitr)
 905                 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
 906                                 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));
 907
 908         /* for re-triggering the interrupt in non-NAPI mode */
 909         adapter->rx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 910         adapter->tx_ring[0].eims_value = (1 << IXGBE_MSIX_VECTOR(0));
 911
 912         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
 913         for (i = 0; i < adapter->num_tx_queues; i++)
 914                 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(i), i);
 915 }
 916
 917 /**
 918  * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
 919  * @adapter: board private structure
 920  *
 921  * Configure the Tx unit of the MAC after a reset.
 922  **/
 923 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
 924 {
 925         u64 tdba;
 926         struct ixgbe_hw *hw = &adapter->hw;
 927         u32 i, tdlen;
 928
 929         /* Setup the HW Tx Head and Tail descriptor pointers */
 930         for (i = 0; i < adapter->num_tx_queues; i++) {
 931                 tdba = adapter->tx_ring[i].dma;
 932                 tdlen = adapter->tx_ring[i].count *
 933                     sizeof(union ixgbe_adv_tx_desc);
 934                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(i), (tdba & DMA_32BIT_MASK));
 935                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(i), (tdba >> 32));
 936                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(i), tdlen);
 937                 IXGBE_WRITE_REG(hw, IXGBE_TDH(i), 0);
 938                 IXGBE_WRITE_REG(hw, IXGBE_TDT(i), 0);
 939                 adapter->tx_ring[i].head = IXGBE_TDH(i);
 940                 adapter->tx_ring[i].tail = IXGBE_TDT(i);
 941         }
 942
 943         IXGBE_WRITE_REG(hw, IXGBE_TIPG, IXGBE_TIPG_FIBER_DEFAULT);
 944 }
 945
 946 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
 947                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
 948
 949 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT                 2
 950 /**
 951  * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
 952  * @adapter: board private structure
 953  *
 954  * Configure the Rx unit of the MAC after a reset.
 955  **/
 956 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 957 {
 958         u64 rdba;
 959         struct ixgbe_hw *hw = &adapter->hw;
 960         struct net_device *netdev = adapter->netdev;
 961         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 962         u32 rdlen, rxctrl, rxcsum;
 963         u32 random[10];
 964         u32 reta, mrqc;
 965         int i;
 966         u32 fctrl, hlreg0;
 967         u32 srrctl;
 968         u32 pages;
 969
 970         /* Decide whether to use packet split mode or not */
 971         if (netdev->mtu > ETH_DATA_LEN)
 972                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
 973         else
 974                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
 975
 976         /* Set the RX buffer length according to the mode */
 977         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 978                 adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
 979         } else {
 980                 if (netdev->mtu <= ETH_DATA_LEN)
 981                         adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
 982                 else
 983                         adapter->rx_buf_len = ALIGN(max_frame, 1024);
 984         }
 985
 986         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
 987         fctrl |= IXGBE_FCTRL_BAM;
 988         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
 989
 990         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
 991         if (adapter->netdev->mtu <= ETH_DATA_LEN)
 992                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
 993         else
 994                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
 995         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
 996
 997         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
 998
 999         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
1000         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1001         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1002
1003         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1004                 srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1005                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1006                 srrctl |= ((IXGBE_RX_HDR_SIZE <<
1007                             IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1008                            IXGBE_SRRCTL_BSIZEHDR_MASK);
1009         } else {
1010                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1011
1012                 if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1013                         srrctl |=
1014                              IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1015                 else
1016                         srrctl |=
1017                              adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1018         }
1019         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);
1020
1021         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1022         /* disable receives while setting up the descriptors */
1023         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1024         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1025
1026         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1027          * the Base and Length of the Rx Descriptor Ring */
1028         for (i = 0; i < adapter->num_rx_queues; i++) {
1029                 rdba = adapter->rx_ring[i].dma;
1030                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
1031                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
1032                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
1033                 IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
1034                 IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
1035                 adapter->rx_ring[i].head = IXGBE_RDH(i);
1036                 adapter->rx_ring[i].tail = IXGBE_RDT(i);
1037         }
1038
1039         if (adapter->num_rx_queues > 1) {
1040                 /* Random 40bytes used as random key in RSS hash function */
1041                 get_random_bytes(&random[0], 40);
1042
1043                 switch (adapter->num_rx_queues) {
1044                 case 8:
1045                 case 4:
1046                         /* Bits [3:0] in each byte refers the Rx queue no */
1047                         reta = 0x00010203;
1048                         break;
1049                 case 2:
1050                         reta = 0x00010001;
1051                         break;
1052                 default:
1053                         reta = 0x00000000;
1054                         break;
1055                 }
1056
1057                 /* Fill out redirection table */
1058                 for (i = 0; i < 32; i++) {
1059                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i, reta);
1060                         if (adapter->num_rx_queues > 4) {
1061                                 i++;
1062                                 IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RETA(0), i,
1063                                                       0x04050607);
1064                         }
1065                 }
1066
1067                 /* Fill out hash function seeds */
1068                 for (i = 0; i < 10; i++)
1069                         IXGBE_WRITE_REG_ARRAY(hw, IXGBE_RSSRK(0), i, random[i]);
1070
1071                 mrqc = IXGBE_MRQC_RSSEN
1072                     /* Perform hash on these packet types */
1073                     | IXGBE_MRQC_RSS_FIELD_IPV4
1074                     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1075                     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1076                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1077                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1078                     | IXGBE_MRQC_RSS_FIELD_IPV6
1079                     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1080                     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1081                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1082                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1083
1084                 /* Multiqueue and packet checksumming are mutually exclusive. */
1085                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1086                 rxcsum |= IXGBE_RXCSUM_PCSD;
1087                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1088         } else {
1089                 /* Enable Receive Checksum Offload for TCP and UDP */
1090                 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1091                 if (adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1092                         /* Enable IPv4 payload checksum for UDP fragments
1093                          * Must be used in conjunction with packet-split. */
1094                         rxcsum |= IXGBE_RXCSUM_IPPCSE;
1095                 } else {
1096                         /* don't need to clear IPPCSE as it defaults to 0 */
1097                 }
1098                 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1099         }
1100         /* Enable Receives */
1101         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
1102         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1103 }
1104
1105 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1106                                    struct vlan_group *grp)
1107 {
1108         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1109         u32 ctrl;
1110
1111         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1112                 ixgbe_irq_disable(adapter);
1113         adapter->vlgrp = grp;
1114
1115         if (grp) {
1116                 /* enable VLAN tag insert/strip */
1117                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1118                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
1119                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1120                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1121         }
1122
1123         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1124                 ixgbe_irq_enable(adapter);
1125 }
1126
1127 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1128 {
1129         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1130
1131         /* add VID to filter table */
1132         ixgbe_set_vfta(&adapter->hw, vid, 0, true);
1133 }
1134
1135 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1136 {
1137         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1138
1139         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1140                 ixgbe_irq_disable(adapter);
1141
1142         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1143
1144         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1145                 ixgbe_irq_enable(adapter);
1146
1147         /* remove VID from filter table */
1148         ixgbe_set_vfta(&adapter->hw, vid, 0, false);
1149 }
1150
1151 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1152 {
1153         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1154
1155         if (adapter->vlgrp) {
1156                 u16 vid;
1157                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1158                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1159                                 continue;
1160                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1161                 }
1162         }
1163 }
1164
1165 /**
1166  * ixgbe_set_multi - Multicast and Promiscuous mode set
1167  * @netdev: network interface device structure
1168  *
1169  * The set_multi entry point is called whenever the multicast address
1170  * list or the network interface flags are updated.  This routine is
1171  * responsible for configuring the hardware for proper multicast,
1172  * promiscuous mode, and all-multi behavior.
1173  **/
1174 static void ixgbe_set_multi(struct net_device *netdev)
1175 {
1176         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1177         struct ixgbe_hw *hw = &adapter->hw;
1178         struct dev_mc_list *mc_ptr;
1179         u8 *mta_list;
1180         u32 fctrl;
1181         int i;
1182
1183         /* Check for Promiscuous and All Multicast modes */
1184
1185         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1186
1187         if (netdev->flags & IFF_PROMISC) {
1188                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1189         } else if (netdev->flags & IFF_ALLMULTI) {
1190                 fctrl |= IXGBE_FCTRL_MPE;
1191                 fctrl &= ~IXGBE_FCTRL_UPE;
1192         } else {
1193                 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1194         }
1195
1196         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1197
1198         if (netdev->mc_count) {
1199                 mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
1200                 if (!mta_list)
1201                         return;
1202
1203                 /* Shared function expects packed array of only addresses. */
1204                 mc_ptr = netdev->mc_list;
1205
1206                 for (i = 0; i < netdev->mc_count; i++) {
1207                         if (!mc_ptr)
1208                                 break;
1209                         memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
1210                                ETH_ALEN);
1211                         mc_ptr = mc_ptr->next;
1212                 }
1213
1214                 ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
1215                 kfree(mta_list);
1216         } else {
1217                 ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
1218         }
1219
1220 }
1221
1222 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1223 {
1224         struct net_device *netdev = adapter->netdev;
1225         int i;
1226
1227         ixgbe_set_multi(netdev);
1228
1229         ixgbe_restore_vlan(adapter);
1230
1231         ixgbe_configure_tx(adapter);
1232         ixgbe_configure_rx(adapter);
1233         for (i = 0; i < adapter->num_rx_queues; i++)
1234                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1235                                            (adapter->rx_ring[i].count - 1));
1236 }
1237
1238 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1239 {
1240         struct net_device *netdev = adapter->netdev;
1241         int i;
1242         u32 gpie = 0;
1243         struct ixgbe_hw *hw = &adapter->hw;
1244         u32 txdctl, rxdctl, mhadd;
1245         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1246
1247         ixgbe_get_hw_control(adapter);
1248
1249         if (adapter->flags & (IXGBE_FLAG_MSIX_ENABLED |
1250                               IXGBE_FLAG_MSI_ENABLED)) {
1251                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1252                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1253                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1254                 } else {
1255                         /* MSI only */
1256                         gpie = (IXGBE_GPIE_EIAME |
1257                                 IXGBE_GPIE_PBA_SUPPORT);
1258                 }
1259                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_GPIE, gpie);
1260                 gpie = IXGBE_READ_REG(&adapter->hw, IXGBE_GPIE);
1261         }
1262
1263         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1264
1265         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1266                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1267                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1268
1269                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1270         }
1271
1272         for (i = 0; i < adapter->num_tx_queues; i++) {
1273                 txdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_TXDCTL(i));
1274                 txdctl |= IXGBE_TXDCTL_ENABLE;
1275                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_TXDCTL(i), txdctl);
1276         }
1277
1278         for (i = 0; i < adapter->num_rx_queues; i++) {
1279                 rxdctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(i));
1280                 rxdctl |= IXGBE_RXDCTL_ENABLE;
1281                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(i), rxdctl);
1282         }
1283         /* enable all receives */
1284         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1285         rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1286         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1287
1288         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1289                 ixgbe_configure_msix(adapter);
1290         else
1291                 ixgbe_configure_msi_and_legacy(adapter);
1292
1293         clear_bit(__IXGBE_DOWN, &adapter->state);
1294         napi_enable(&adapter->napi);
1295         ixgbe_irq_enable(adapter);
1296
1297         /* bring the link up in the watchdog, this could race with our first
1298          * link up interrupt but shouldn't be a problem */
1299         mod_timer(&adapter->watchdog_timer, jiffies);
1300         return 0;
1301 }
1302
1303 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
1304 {
1305         WARN_ON(in_interrupt());
1306         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
1307                 msleep(1);
1308         ixgbe_down(adapter);
1309         ixgbe_up(adapter);
1310         clear_bit(__IXGBE_RESETTING, &adapter->state);
1311 }
1312
1313 int ixgbe_up(struct ixgbe_adapter *adapter)
1314 {
1315         /* hardware has been reset, we need to reload some things */
1316         ixgbe_configure(adapter);
1317
1318         return ixgbe_up_complete(adapter);
1319 }
1320
1321 void ixgbe_reset(struct ixgbe_adapter *adapter)
1322 {
1323         if (ixgbe_init_hw(&adapter->hw))
1324                 DPRINTK(PROBE, ERR, "Hardware Error\n");
1325
1326         /* reprogram the RAR[0] in case user changed it. */
1327         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
1328
1329 }
1330
1331 #ifdef CONFIG_PM
1332 static int ixgbe_resume(struct pci_dev *pdev)
1333 {
1334         struct net_device *netdev = pci_get_drvdata(pdev);
1335         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1336         u32 err, num_rx_queues = adapter->num_rx_queues;
1337
1338         pci_set_power_state(pdev, PCI_D0);
1339         pci_restore_state(pdev);
1340         err = pci_enable_device(pdev);
1341         if (err) {
1342                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
1343                                 "suspend\n");
1344                 return err;
1345         }
1346         pci_set_master(pdev);
1347
1348         pci_enable_wake(pdev, PCI_D3hot, 0);
1349         pci_enable_wake(pdev, PCI_D3cold, 0);
1350
1351         if (netif_running(netdev)) {
1352                 err = ixgbe_request_irq(adapter, &num_rx_queues);
1353                 if (err)
1354                         return err;
1355         }
1356
1357         ixgbe_reset(adapter);
1358
1359         if (netif_running(netdev))
1360                 ixgbe_up(adapter);
1361
1362         netif_device_attach(netdev);
1363
1364         return 0;
1365 }
1366 #endif
1367
1368 /**
1369  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
1370  * @adapter: board private structure
1371  * @rx_ring: ring to free buffers from
1372  **/
1373 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
1374                                 struct ixgbe_ring *rx_ring)
1375 {
1376         struct pci_dev *pdev = adapter->pdev;
1377         unsigned long size;
1378         unsigned int i;
1379
1380         /* Free all the Rx ring sk_buffs */
1381
1382         for (i = 0; i < rx_ring->count; i++) {
1383                 struct ixgbe_rx_buffer *rx_buffer_info;
1384
1385                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1386                 if (rx_buffer_info->dma) {
1387                         pci_unmap_single(pdev, rx_buffer_info->dma,
1388                                          adapter->rx_buf_len,
1389                                          PCI_DMA_FROMDEVICE);
1390                         rx_buffer_info->dma = 0;
1391                 }
1392                 if (rx_buffer_info->skb) {
1393                         dev_kfree_skb(rx_buffer_info->skb);
1394                         rx_buffer_info->skb = NULL;
1395                 }
1396                 if (!rx_buffer_info->page)
1397                         continue;
1398                 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
1399                                PCI_DMA_FROMDEVICE);
1400                 rx_buffer_info->page_dma = 0;
1401
1402                 put_page(rx_buffer_info->page);
1403                 rx_buffer_info->page = NULL;
1404         }
1405
1406         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
1407         memset(rx_ring->rx_buffer_info, 0, size);
1408
1409         /* Zero out the descriptor ring */
1410         memset(rx_ring->desc, 0, rx_ring->size);
1411
1412         rx_ring->next_to_clean = 0;
1413         rx_ring->next_to_use = 0;
1414
1415         writel(0, adapter->hw.hw_addr + rx_ring->head);
1416         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1417 }
1418
1419 /**
1420  * ixgbe_clean_tx_ring - Free Tx Buffers
1421  * @adapter: board private structure
1422  * @tx_ring: ring to be cleaned
1423  **/
1424 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
1425                                 struct ixgbe_ring *tx_ring)
1426 {
1427         struct ixgbe_tx_buffer *tx_buffer_info;
1428         unsigned long size;
1429         unsigned int i;
1430
1431         /* Free all the Tx ring sk_buffs */
1432
1433         for (i = 0; i < tx_ring->count; i++) {
1434                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1435                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1436         }
1437
1438         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
1439         memset(tx_ring->tx_buffer_info, 0, size);
1440
1441         /* Zero out the descriptor ring */
1442         memset(tx_ring->desc, 0, tx_ring->size);
1443
1444         tx_ring->next_to_use = 0;
1445         tx_ring->next_to_clean = 0;
1446
1447         writel(0, adapter->hw.hw_addr + tx_ring->head);
1448         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1449 }
1450
1451 /**
1452  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
1453  * @adapter: board private structure
1454  **/
1455 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
1456 {
1457         int i;
1458
1459         for (i = 0; i < adapter->num_tx_queues; i++)
1460                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1461 }
1462
1463 /**
1464  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
1465  * @adapter: board private structure
1466  **/
1467 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
1468 {
1469         int i;
1470
1471         for (i = 0; i < adapter->num_rx_queues; i++)
1472                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1473 }
1474
1475 void ixgbe_down(struct ixgbe_adapter *adapter)
1476 {
1477         struct net_device *netdev = adapter->netdev;
1478         u32 rxctrl;
1479
1480         /* signal that we are down to the interrupt handler */
1481         set_bit(__IXGBE_DOWN, &adapter->state);
1482
1483         /* disable receives */
1484         rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
1485         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
1486                         rxctrl & ~IXGBE_RXCTRL_RXEN);
1487
1488         netif_tx_disable(netdev);
1489
1490         /* disable transmits in the hardware */
1491
1492         /* flush both disables */
1493         IXGBE_WRITE_FLUSH(&adapter->hw);
1494         msleep(10);
1495
1496         napi_disable(&adapter->napi);
1497
1498         ixgbe_irq_disable(adapter);
1499
1500         del_timer_sync(&adapter->watchdog_timer);
1501
1502         netif_carrier_off(netdev);
1503         netif_stop_queue(netdev);
1504
1505         ixgbe_reset(adapter);
1506         ixgbe_clean_all_tx_rings(adapter);
1507         ixgbe_clean_all_rx_rings(adapter);
1508
1509 }
1510
1511 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
1512 {
1513         struct net_device *netdev = pci_get_drvdata(pdev);
1514         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1515 #ifdef CONFIG_PM
1516         int retval = 0;
1517 #endif
1518
1519         netif_device_detach(netdev);
1520
1521         if (netif_running(netdev)) {
1522                 ixgbe_down(adapter);
1523                 ixgbe_free_irq(adapter);
1524         }
1525
1526 #ifdef CONFIG_PM
1527         retval = pci_save_state(pdev);
1528         if (retval)
1529                 return retval;
1530 #endif
1531
1532         pci_enable_wake(pdev, PCI_D3hot, 0);
1533         pci_enable_wake(pdev, PCI_D3cold, 0);
1534
1535         ixgbe_release_hw_control(adapter);
1536
1537         pci_disable_device(pdev);
1538
1539         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1540
1541         return 0;
1542 }
1543
1544 static void ixgbe_shutdown(struct pci_dev *pdev)
1545 {
1546         ixgbe_suspend(pdev, PMSG_SUSPEND);
1547 }
1548
1549 /**
1550  * ixgbe_clean - NAPI Rx polling callback
1551  * @adapter: board private structure
1552  **/
1553 static int ixgbe_clean(struct napi_struct *napi, int budget)
1554 {
1555         struct ixgbe_adapter *adapter = container_of(napi,
1556                                         struct ixgbe_adapter, napi);
1557         struct net_device *netdev = adapter->netdev;
1558         int tx_cleaned = 0, work_done = 0;
1559
1560         /* In non-MSIX case, there is no multi-Tx/Rx queue */
1561         tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
1562         ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
1563                            budget);
1564
1565         if (tx_cleaned)
1566                 work_done = budget;
1567
1568         /* If budget not fully consumed, exit the polling mode */
1569         if (work_done < budget) {
1570                 netif_rx_complete(netdev, napi);
1571                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1572                         ixgbe_irq_enable(adapter);
1573         }
1574
1575         return work_done;
1576 }
1577
1578 /**
1579  * ixgbe_tx_timeout - Respond to a Tx Hang
1580  * @netdev: network interface device structure
1581  **/
1582 static void ixgbe_tx_timeout(struct net_device *netdev)
1583 {
1584         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1585
1586         /* Do the reset outside of interrupt context */
1587         schedule_work(&adapter->reset_task);
1588 }
1589
1590 static void ixgbe_reset_task(struct work_struct *work)
1591 {
1592         struct ixgbe_adapter *adapter;
1593         adapter = container_of(work, struct ixgbe_adapter, reset_task);
1594
1595         adapter->tx_timeout_count++;
1596
1597         ixgbe_reinit_locked(adapter);
1598 }
1599
1600 /**
1601  * ixgbe_alloc_queues - Allocate memory for all rings
1602  * @adapter: board private structure to initialize
1603  *
1604  * We allocate one ring per queue at run-time since we don't know the
1605  * number of queues at compile-time.  The polling_netdev array is
1606  * intended for Multiqueue, but should work fine with a single queue.
1607  **/
1608 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
1609 {
1610         int i;
1611
1612         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1613                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1614         if (!adapter->tx_ring)
1615                 return -ENOMEM;
1616
1617         for (i = 0; i < adapter->num_tx_queues; i++)
1618                 adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;
1619
1620         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1621                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
1622         if (!adapter->rx_ring) {
1623                 kfree(adapter->tx_ring);
1624                 return -ENOMEM;
1625         }
1626
1627         for (i = 0; i < adapter->num_rx_queues; i++) {
1628                 adapter->rx_ring[i].adapter = adapter;
1629                 adapter->rx_ring[i].itr_register = IXGBE_EITR(i);
1630                 adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
1631         }
1632
1633         return 0;
1634 }
1635
1636 /**
1637  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
1638  * @adapter: board private structure to initialize
1639  *
1640  * ixgbe_sw_init initializes the Adapter private data structure.
1641  * Fields are initialized based on PCI device information and
1642  * OS network device settings (MTU size).
1643  **/
1644 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
1645 {
1646         struct ixgbe_hw *hw = &adapter->hw;
1647         struct pci_dev *pdev = adapter->pdev;
1648
1649         /* default flow control settings */
1650         hw->fc.original_type = ixgbe_fc_full;
1651         hw->fc.type = ixgbe_fc_full;
1652
1653         hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
1654         if (hw->mac.ops.reset(hw)) {
1655                 dev_err(&pdev->dev, "HW Init failed\n");
1656                 return -EIO;
1657         }
1658         if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true,
1659                                          false)) {
1660                 dev_err(&pdev->dev, "Link Speed setup failed\n");
1661                 return -EIO;
1662         }
1663
1664         /* initialize eeprom parameters */
1665         if (ixgbe_init_eeprom(hw)) {
1666                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
1667                 return -EIO;
1668         }
1669
1670         /* Set the default values */
1671         adapter->num_rx_queues = IXGBE_DEFAULT_RXQ;
1672         adapter->num_tx_queues = 1;
1673         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
1674
1675         if (ixgbe_alloc_queues(adapter)) {
1676                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1677                 return -ENOMEM;
1678         }
1679
1680         set_bit(__IXGBE_DOWN, &adapter->state);
1681
1682         return 0;
1683 }
1684
1685 /**
1686  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
1687  * @adapter: board private structure
1688  * @txdr:    tx descriptor ring (for a specific queue) to setup
1689  *
1690  * Return 0 on success, negative on failure
1691  **/
1692 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
1693                              struct ixgbe_ring *txdr)
1694 {
1695         struct pci_dev *pdev = adapter->pdev;
1696         int size;
1697
1698         size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
1699         txdr->tx_buffer_info = vmalloc(size);
1700         if (!txdr->tx_buffer_info) {
1701                 DPRINTK(PROBE, ERR,
1702                 "Unable to allocate memory for the transmit descriptor ring\n");
1703                 return -ENOMEM;
1704         }
1705         memset(txdr->tx_buffer_info, 0, size);
1706
1707         /* round up to nearest 4K */
1708         txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
1709         txdr->size = ALIGN(txdr->size, 4096);
1710
1711         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1712         if (!txdr->desc) {
1713                 vfree(txdr->tx_buffer_info);
1714                 DPRINTK(PROBE, ERR,
1715                         "Memory allocation failed for the tx desc ring\n");
1716                 return -ENOMEM;
1717         }
1718
1719         txdr->adapter = adapter;
1720         txdr->next_to_use = 0;
1721         txdr->next_to_clean = 0;
1722         txdr->work_limit = txdr->count;
1723
1724         return 0;
1725 }
1726
1727 /**
1728  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
1729  * @adapter: board private structure
1730  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1731  *
1732  * Returns 0 on success, negative on failure
1733  **/
1734 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
1735                              struct ixgbe_ring *rxdr)
1736 {
1737         struct pci_dev *pdev = adapter->pdev;
1738         int size, desc_len;
1739
1740         size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
1741         rxdr->rx_buffer_info = vmalloc(size);
1742         if (!rxdr->rx_buffer_info) {
1743                 DPRINTK(PROBE, ERR,
1744                         "vmalloc allocation failed for the rx desc ring\n");
1745                 return -ENOMEM;
1746         }
1747         memset(rxdr->rx_buffer_info, 0, size);
1748
1749         desc_len = sizeof(union ixgbe_adv_rx_desc);
1750
1751         /* Round up to nearest 4K */
1752         rxdr->size = rxdr->count * desc_len;
1753         rxdr->size = ALIGN(rxdr->size, 4096);
1754
1755         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1756
1757         if (!rxdr->desc) {
1758                 DPRINTK(PROBE, ERR,
1759                         "Memory allocation failed for the rx desc ring\n");
1760                 vfree(rxdr->rx_buffer_info);
1761                 return -ENOMEM;
1762         }
1763
1764         rxdr->next_to_clean = 0;
1765         rxdr->next_to_use = 0;
1766         rxdr->adapter = adapter;
1767
1768         return 0;
1769 }
1770
1771 /**
1772  * ixgbe_free_tx_resources - Free Tx Resources per Queue
1773  * @adapter: board private structure
1774  * @tx_ring: Tx descriptor ring for a specific queue
1775  *
1776  * Free all transmit software resources
1777  **/
1778 static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
1779                                     struct ixgbe_ring *tx_ring)
1780 {
1781         struct pci_dev *pdev = adapter->pdev;
1782
1783         ixgbe_clean_tx_ring(adapter, tx_ring);
1784
1785         vfree(tx_ring->tx_buffer_info);
1786         tx_ring->tx_buffer_info = NULL;
1787
1788         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1789
1790         tx_ring->desc = NULL;
1791 }
1792
1793 /**
1794  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
1795  * @adapter: board private structure
1796  *
1797  * Free all transmit software resources
1798  **/
1799 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
1800 {
1801         int i;
1802
1803         for (i = 0; i < adapter->num_tx_queues; i++)
1804                 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
1805 }
1806
1807 /**
1808  * ixgbe_free_rx_resources - Free Rx Resources
1809  * @adapter: board private structure
1810  * @rx_ring: ring to clean the resources from
1811  *
1812  * Free all receive software resources
1813  **/
1814 static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
1815                                     struct ixgbe_ring *rx_ring)
1816 {
1817         struct pci_dev *pdev = adapter->pdev;
1818
1819         ixgbe_clean_rx_ring(adapter, rx_ring);
1820
1821         vfree(rx_ring->rx_buffer_info);
1822         rx_ring->rx_buffer_info = NULL;
1823
1824         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1825
1826         rx_ring->desc = NULL;
1827 }
1828
1829 /**
1830  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
1831  * @adapter: board private structure
1832  *
1833  * Free all receive software resources
1834  **/
1835 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
1836 {
1837         int i;
1838
1839         for (i = 0; i < adapter->num_rx_queues; i++)
1840                 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
1841 }
1842
1843 /**
1844  * ixgbe_setup_all_tx_resources - wrapper to allocate Tx resources
1845  *                                (Descriptors) for all queues
1846  * @adapter: board private structure
1847  *
1848  * If this function returns with an error, then it's possible one or
1849  * more of the rings is populated (while the rest are not).  It is the
1850  * callers duty to clean those orphaned rings.
1851  *
1852  * Return 0 on success, negative on failure
1853  **/
1854 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
1855 {
1856         int i, err = 0;
1857
1858         for (i = 0; i < adapter->num_tx_queues; i++) {
1859                 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1860                 if (err) {
1861                         DPRINTK(PROBE, ERR,
1862                                 "Allocation for Tx Queue %u failed\n", i);
1863                         break;
1864                 }
1865         }
1866
1867         return err;
1868 }
1869
1870 /**
1871  * ixgbe_setup_all_rx_resources - wrapper to allocate Rx resources
1872  *                                (Descriptors) for all queues
1873  * @adapter: board private structure
1874  *
1875  * If this function returns with an error, then it's possible one or
1876  * more of the rings is populated (while the rest are not).  It is the
1877  * callers duty to clean those orphaned rings.
1878  *
1879  * Return 0 on success, negative on failure
1880  **/
1881
1882 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
1883 {
1884         int i, err = 0;
1885
1886         for (i = 0; i < adapter->num_rx_queues; i++) {
1887                 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1888                 if (err) {
1889                         DPRINTK(PROBE, ERR,
1890                                 "Allocation for Rx Queue %u failed\n", i);
1891                         break;
1892                 }
1893         }
1894
1895         return err;
1896 }
1897
1898 /**
1899  * ixgbe_change_mtu - Change the Maximum Transfer Unit
1900  * @netdev: network interface device structure
1901  * @new_mtu: new value for maximum frame size
1902  *
1903  * Returns 0 on success, negative on failure
1904  **/
1905 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
1906 {
1907         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1908         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1909
1910         if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
1911             (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
1912                 return -EINVAL;
1913
1914         netdev->mtu = new_mtu;
1915
1916         if (netif_running(netdev))
1917                 ixgbe_reinit_locked(adapter);
1918
1919         return 0;
1920 }
1921
1922 /**
1923  * ixgbe_open - Called when a network interface is made active
1924  * @netdev: network interface device structure
1925  *
1926  * Returns 0 on success, negative value on failure
1927  *
1928  * The open entry point is called when a network interface is made
1929  * active by the system (IFF_UP).  At this point all resources needed
1930  * for transmit and receive operations are allocated, the interrupt
1931  * handler is registered with the OS, the watchdog timer is started,
1932  * and the stack is notified that the interface is ready.
1933  **/
1934 static int ixgbe_open(struct net_device *netdev)
1935 {
1936         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1937         int err;
1938         u32 num_rx_queues = adapter->num_rx_queues;
1939
1940         /* disallow open during test */
1941         if (test_bit(__IXGBE_TESTING, &adapter->state))
1942                 return -EBUSY;
1943
1944 try_intr_reinit:
1945         /* allocate transmit descriptors */
1946         err = ixgbe_setup_all_tx_resources(adapter);
1947         if (err)
1948                 goto err_setup_tx;
1949
1950         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1951                 num_rx_queues = 1;
1952                 adapter->num_rx_queues = num_rx_queues;
1953         }
1954
1955         /* allocate receive descriptors */
1956         err = ixgbe_setup_all_rx_resources(adapter);
1957         if (err)
1958                 goto err_setup_rx;
1959
1960         ixgbe_configure(adapter);
1961
1962         err = ixgbe_request_irq(adapter, &num_rx_queues);
1963         if (err)
1964                 goto err_req_irq;
1965
1966         /* ixgbe_request might have reduced num_rx_queues */
1967         if (num_rx_queues < adapter->num_rx_queues) {
1968                 /* We didn't get MSI-X, so we need to release everything,
1969                  * set our Rx queue count to num_rx_queues, and redo the
1970                  * whole init process.
1971                  */
1972                 ixgbe_free_irq(adapter);
1973                 if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1974                         pci_disable_msi(adapter->pdev);
1975                         adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
1976                 }
1977                 ixgbe_free_all_rx_resources(adapter);
1978                 ixgbe_free_all_tx_resources(adapter);
1979                 adapter->num_rx_queues = num_rx_queues;
1980
1981                 /* Reset the hardware, and start over. */
1982                 ixgbe_reset(adapter);
1983
1984                 goto try_intr_reinit;
1985         }
1986
1987         err = ixgbe_up_complete(adapter);
1988         if (err)
1989                 goto err_up;
1990
1991         return 0;
1992
1993 err_up:
1994         ixgbe_release_hw_control(adapter);
1995         ixgbe_free_irq(adapter);
1996 err_req_irq:
1997         ixgbe_free_all_rx_resources(adapter);
1998 err_setup_rx:
1999         ixgbe_free_all_tx_resources(adapter);
2000 err_setup_tx:
2001         ixgbe_reset(adapter);
2002
2003         return err;
2004 }
2005
2006 /**
2007  * ixgbe_close - Disables a network interface
2008  * @netdev: network interface device structure
2009  *
2010  * Returns 0, this is not allowed to fail
2011  *
2012  * The close entry point is called when an interface is de-activated
2013  * by the OS.  The hardware is still under the drivers control, but
2014  * needs to be disabled.  A global MAC reset is issued to stop the
2015  * hardware, and all transmit and receive resources are freed.
2016  **/
2017 static int ixgbe_close(struct net_device *netdev)
2018 {
2019         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2020
2021         ixgbe_down(adapter);
2022         ixgbe_free_irq(adapter);
2023
2024         ixgbe_free_all_tx_resources(adapter);
2025         ixgbe_free_all_rx_resources(adapter);
2026
2027         ixgbe_release_hw_control(adapter);
2028
2029         return 0;
2030 }
2031
2032 /**
2033  * ixgbe_update_stats - Update the board statistics counters.
2034  * @adapter: board private structure
2035  **/
2036 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
2037 {
2038         struct ixgbe_hw *hw = &adapter->hw;
2039         u64 total_mpc = 0;
2040         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
2041
2042         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
2043         for (i = 0; i < 8; i++) {
2044                 /* for packet buffers not used, the register should read 0 */
2045                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
2046                 missed_rx += mpc;
2047                 adapter->stats.mpc[i] += mpc;
2048                 total_mpc += adapter->stats.mpc[i];
2049                 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
2050         }
2051         adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
2052         /* work around hardware counting issue */
2053         adapter->stats.gprc -= missed_rx;
2054
2055         /* 82598 hardware only has a 32 bit counter in the high register */
2056         adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
2057         adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
2058         adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
2059         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
2060         adapter->stats.bprc += bprc;
2061         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
2062         adapter->stats.mprc -= bprc;
2063         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
2064         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
2065         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
2066         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
2067         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
2068         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
2069         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
2070         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
2071         adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
2072         adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
2073         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
2074         adapter->stats.lxontxc += lxon;
2075         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
2076         adapter->stats.lxofftxc += lxoff;
2077         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2078         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
2079         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
2080         /*
2081          * 82598 errata - tx of flow control packets is included in tx counters
2082          */
2083         xon_off_tot = lxon + lxoff;
2084         adapter->stats.gptc -= xon_off_tot;
2085         adapter->stats.mptc -= xon_off_tot;
2086         adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
2087         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2088         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
2089         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
2090         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
2091         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
2092         adapter->stats.ptc64 -= xon_off_tot;
2093         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
2094         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
2095         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
2096         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
2097         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
2098         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
2099
2100         /* Fill out the OS statistics structure */
2101         adapter->net_stats.multicast = adapter->stats.mprc;
2102
2103         /* Rx Errors */
2104         adapter->net_stats.rx_errors = adapter->stats.crcerrs +
2105                                                 adapter->stats.rlec;
2106         adapter->net_stats.rx_dropped = 0;
2107         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2108         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2109         adapter->net_stats.rx_missed_errors = total_mpc;
2110 }
2111
2112 /**
2113  * ixgbe_watchdog - Timer Call-back
2114  * @data: pointer to adapter cast into an unsigned long
2115  **/
2116 static void ixgbe_watchdog(unsigned long data)
2117 {
2118         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
2119         struct net_device *netdev = adapter->netdev;
2120         bool link_up;
2121         u32 link_speed = 0;
2122
2123         adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up);
2124
2125         if (link_up) {
2126                 if (!netif_carrier_ok(netdev)) {
2127                         u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2128                         u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS);
2129 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
2130 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
2131                         DPRINTK(LINK, INFO, "NIC Link is Up %s, "
2132                                 "Flow Control: %s\n",
2133                                 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
2134                                  "10 Gbps" :
2135                                  (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
2136                                   "1 Gbps" : "unknown speed")),
2137                                 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
2138                                  (FLOW_RX ? "RX" :
2139                                  (FLOW_TX ? "TX" : "None"))));
2140
2141                         netif_carrier_on(netdev);
2142                         netif_wake_queue(netdev);
2143                 } else {
2144                         /* Force detection of hung controller */
2145                         adapter->detect_tx_hung = true;
2146                 }
2147         } else {
2148                 if (netif_carrier_ok(netdev)) {
2149                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2150                         netif_carrier_off(netdev);
2151                         netif_stop_queue(netdev);
2152                 }
2153         }
2154
2155         ixgbe_update_stats(adapter);
2156
2157         /* Reset the timer */
2158         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2159                 mod_timer(&adapter->watchdog_timer,
2160                           round_jiffies(jiffies + 2 * HZ));
2161 }
2162
2163 static int ixgbe_tso(struct ixgbe_adapter *adapter,
2164                          struct ixgbe_ring *tx_ring, struct sk_buff *skb,
2165                          u32 tx_flags, u8 *hdr_len)
2166 {
2167         struct ixgbe_adv_tx_context_desc *context_desc;
2168         unsigned int i;
2169         int err;
2170         struct ixgbe_tx_buffer *tx_buffer_info;
2171         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2172         u32 mss_l4len_idx = 0, l4len;
2173         *hdr_len = 0;
2174
2175         if (skb_is_gso(skb)) {
2176                 if (skb_header_cloned(skb)) {
2177                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2178                         if (err)
2179                                 return err;
2180                 }
2181                 l4len = tcp_hdrlen(skb);
2182                 *hdr_len += l4len;
2183
2184                 if (skb->protocol == htons(ETH_P_IP)) {
2185                         struct iphdr *iph = ip_hdr(skb);
2186                         iph->tot_len = 0;
2187                         iph->check = 0;
2188                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2189                                                                  iph->daddr, 0,
2190                                                                  IPPROTO_TCP,
2191                                                                  0);
2192                         adapter->hw_tso_ctxt++;
2193                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2194                         ipv6_hdr(skb)->payload_len = 0;
2195                         tcp_hdr(skb)->check =
2196                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2197                                              &ipv6_hdr(skb)->daddr,
2198                                              0, IPPROTO_TCP, 0);
2199                         adapter->hw_tso6_ctxt++;
2200                 }
2201
2202                 i = tx_ring->next_to_use;
2203
2204                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2205                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2206
2207                 /* VLAN MACLEN IPLEN */
2208                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2209                         vlan_macip_lens |=
2210                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2211                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2212                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2213                 *hdr_len += skb_network_offset(skb);
2214                 vlan_macip_lens |=
2215                     (skb_transport_header(skb) - skb_network_header(skb));
2216                 *hdr_len +=
2217                     (skb_transport_header(skb) - skb_network_header(skb));
2218                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2219                 context_desc->seqnum_seed = 0;
2220
2221                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2222                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2223                                     IXGBE_ADVTXD_DTYP_CTXT);
2224
2225                 if (skb->protocol == htons(ETH_P_IP))
2226                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2227                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2228                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2229
2230                 /* MSS L4LEN IDX */
2231                 mss_l4len_idx |=
2232                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2233                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2234                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2235
2236                 tx_buffer_info->time_stamp = jiffies;
2237                 tx_buffer_info->next_to_watch = i;
2238
2239                 i++;
2240                 if (i == tx_ring->count)
2241                         i = 0;
2242                 tx_ring->next_to_use = i;
2243
2244                 return true;
2245         }
2246         return false;
2247 }
2248
2249 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
2250                                    struct ixgbe_ring *tx_ring,
2251                                    struct sk_buff *skb, u32 tx_flags)
2252 {
2253         struct ixgbe_adv_tx_context_desc *context_desc;
2254         unsigned int i;
2255         struct ixgbe_tx_buffer *tx_buffer_info;
2256         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2257
2258         if (skb->ip_summed == CHECKSUM_PARTIAL ||
2259             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2260                 i = tx_ring->next_to_use;
2261                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2262                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2263
2264                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2265                         vlan_macip_lens |=
2266                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2267                 vlan_macip_lens |= (skb_network_offset(skb) <<
2268                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2269                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2270                         vlan_macip_lens |= (skb_transport_header(skb) -
2271                                             skb_network_header(skb));
2272
2273                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2274                 context_desc->seqnum_seed = 0;
2275
2276                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2277                                     IXGBE_ADVTXD_DTYP_CTXT);
2278
2279                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2280                         switch (skb->protocol) {
2281                         case __constant_htons(ETH_P_IP):
2282                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2283                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2284                                         type_tucmd_mlhl |=
2285                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2286                                 break;
2287
2288                         case __constant_htons(ETH_P_IPV6):
2289                                 /* XXX what about other V6 headers?? */
2290                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2291                                         type_tucmd_mlhl |=
2292                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2293                                 break;
2294
2295                         default:
2296                                 if (unlikely(net_ratelimit())) {
2297                                         DPRINTK(PROBE, WARNING,
2298                                          "partial checksum but proto=%x!\n",
2299                                          skb->protocol);
2300                                 }
2301                                 break;
2302                         }
2303                 }
2304
2305                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2306                 context_desc->mss_l4len_idx = 0;
2307
2308                 tx_buffer_info->time_stamp = jiffies;
2309                 tx_buffer_info->next_to_watch = i;
2310                 adapter->hw_csum_tx_good++;
2311                 i++;
2312                 if (i == tx_ring->count)
2313                         i = 0;
2314                 tx_ring->next_to_use = i;
2315
2316                 return true;
2317         }
2318         return false;
2319 }
2320
2321 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
2322                         struct ixgbe_ring *tx_ring,
2323                         struct sk_buff *skb, unsigned int first)
2324 {
2325         struct ixgbe_tx_buffer *tx_buffer_info;
2326         unsigned int len = skb->len;
2327         unsigned int offset = 0, size, count = 0, i;
2328         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2329         unsigned int f;
2330
2331         len -= skb->data_len;
2332
2333         i = tx_ring->next_to_use;
2334
2335         while (len) {
2336                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2337                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2338
2339                 tx_buffer_info->length = size;
2340                 tx_buffer_info->dma = pci_map_single(adapter->pdev,
2341                                                   skb->data + offset,
2342                                                   size, PCI_DMA_TODEVICE);
2343                 tx_buffer_info->time_stamp = jiffies;
2344                 tx_buffer_info->next_to_watch = i;
2345
2346                 len -= size;
2347                 offset += size;
2348                 count++;
2349                 i++;
2350                 if (i == tx_ring->count)
2351                         i = 0;
2352         }
2353
2354         for (f = 0; f < nr_frags; f++) {
2355                 struct skb_frag_struct *frag;
2356
2357                 frag = &skb_shinfo(skb)->frags[f];
2358                 len = frag->size;
2359                 offset = frag->page_offset;
2360
2361                 while (len) {
2362                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2363                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
2364
2365                         tx_buffer_info->length = size;
2366                         tx_buffer_info->dma = pci_map_page(adapter->pdev,
2367                                                         frag->page,
2368                                                         offset,
2369                                                         size, PCI_DMA_TODEVICE);
2370                         tx_buffer_info->time_stamp = jiffies;
2371                         tx_buffer_info->next_to_watch = i;
2372
2373                         len -= size;
2374                         offset += size;
2375                         count++;
2376                         i++;
2377                         if (i == tx_ring->count)
2378                                 i = 0;
2379                 }
2380         }
2381         if (i == 0)
2382                 i = tx_ring->count - 1;
2383         else
2384                 i = i - 1;
2385         tx_ring->tx_buffer_info[i].skb = skb;
2386         tx_ring->tx_buffer_info[first].next_to_watch = i;
2387
2388         return count;
2389 }
2390
2391 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
2392                                struct ixgbe_ring *tx_ring,
2393                                int tx_flags, int count, u32 paylen, u8 hdr_len)
2394 {
2395         union ixgbe_adv_tx_desc *tx_desc = NULL;
2396         struct ixgbe_tx_buffer *tx_buffer_info;
2397         u32 olinfo_status = 0, cmd_type_len = 0;
2398         unsigned int i;
2399         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2400
2401         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2402
2403         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2404
2405         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2406                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2407
2408         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2409                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2410
2411                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2412                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2413
2414                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2415                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
2416                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2417
2418         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2419                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
2420                                                 IXGBE_ADVTXD_POPTS_SHIFT;
2421
2422         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2423
2424         i = tx_ring->next_to_use;
2425         while (count--) {
2426                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2427                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
2428                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2429                 tx_desc->read.cmd_type_len =
2430                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2431                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2432
2433                 i++;
2434                 if (i == tx_ring->count)
2435                         i = 0;
2436         }
2437
2438         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2439
2440         /*
2441          * Force memory writes to complete before letting h/w
2442          * know there are new descriptors to fetch.  (Only
2443          * applicable for weak-ordered memory model archs,
2444          * such as IA-64).
2445          */
2446         wmb();
2447
2448         tx_ring->next_to_use = i;
2449         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2450 }
2451
2452 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
2453                                  struct ixgbe_ring *tx_ring, int size)
2454 {
2455         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2456
2457         netif_stop_queue(netdev);
2458         /* Herbert's original patch had:
2459          *  smp_mb__after_netif_stop_queue();
2460          * but since that doesn't exist yet, just open code it. */
2461         smp_mb();
2462
2463         /* We need to check again in a case another CPU has just
2464          * made room available. */
2465         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
2466                 return -EBUSY;
2467
2468         /* A reprieve! - use start_queue because it doesn't call schedule */
2469         netif_wake_queue(netdev);
2470         ++adapter->restart_queue;
2471         return 0;
2472 }
2473
2474 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
2475                                struct ixgbe_ring *tx_ring, int size)
2476 {
2477         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
2478                 return 0;
2479         return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
2480 }
2481
2482
2483 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2484 {
2485         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2486         struct ixgbe_ring *tx_ring;
2487         unsigned int len = skb->len;
2488         unsigned int first;
2489         unsigned int tx_flags = 0;
2490         u8 hdr_len;
2491         int tso;
2492         unsigned int mss = 0;
2493         int count = 0;
2494         unsigned int f;
2495         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2496         len -= skb->data_len;
2497
2498         tx_ring = adapter->tx_ring;
2499
2500         if (skb->len <= 0) {
2501                 dev_kfree_skb(skb);
2502                 return NETDEV_TX_OK;
2503         }
2504         mss = skb_shinfo(skb)->gso_size;
2505
2506         if (mss)
2507                 count++;
2508         else if (skb->ip_summed == CHECKSUM_PARTIAL)
2509                 count++;
2510
2511         count += TXD_USE_COUNT(len);
2512         for (f = 0; f < nr_frags; f++)
2513                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
2514
2515         if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
2516                 adapter->tx_busy++;
2517                 return NETDEV_TX_BUSY;
2518         }
2519         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2520                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
2521                 tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
2522         }
2523
2524         if (skb->protocol == htons(ETH_P_IP))
2525                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
2526         first = tx_ring->next_to_use;
2527         tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
2528         if (tso < 0) {
2529                 dev_kfree_skb_any(skb);
2530                 return NETDEV_TX_OK;
2531         }
2532
2533         if (tso)
2534                 tx_flags |= IXGBE_TX_FLAGS_TSO;
2535         else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2536                  (skb->ip_summed == CHECKSUM_PARTIAL))
2537                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
2538
2539         ixgbe_tx_queue(adapter, tx_ring, tx_flags,
2540                            ixgbe_tx_map(adapter, tx_ring, skb, first),
2541                            skb->len, hdr_len);
2542
2543         netdev->trans_start = jiffies;
2544
2545         ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
2546
2547         return NETDEV_TX_OK;
2548 }
2549
2550 /**
2551  * ixgbe_get_stats - Get System Network Statistics
2552  * @netdev: network interface device structure
2553  *
2554  * Returns the address of the device statistics structure.
2555  * The statistics are actually updated from the timer callback.
2556  **/
2557 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
2558 {
2559         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2560
2561         /* only return the current stats */
2562         return &adapter->net_stats;
2563 }
2564
2565 /**
2566  * ixgbe_set_mac - Change the Ethernet Address of the NIC
2567  * @netdev: network interface device structure
2568  * @p: pointer to an address structure
2569  *
2570  * Returns 0 on success, negative on failure
2571  **/
2572 static int ixgbe_set_mac(struct net_device *netdev, void *p)
2573 {
2574         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2575         struct sockaddr *addr = p;
2576
2577         if (!is_valid_ether_addr(addr->sa_data))
2578                 return -EADDRNOTAVAIL;
2579
2580         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2581         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2582
2583         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
2584
2585         return 0;
2586 }
2587
2588 #ifdef CONFIG_NET_POLL_CONTROLLER
2589 /*
2590  * Polling 'interrupt' - used by things like netconsole to send skbs
2591  * without having to re-enable interrupts. It's not called while
2592  * the interrupt routine is executing.
2593  */
2594 static void ixgbe_netpoll(struct net_device *netdev)
2595 {
2596         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2597
2598         disable_irq(adapter->pdev->irq);
2599         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
2600         ixgbe_intr(adapter->pdev->irq, netdev);
2601         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
2602         enable_irq(adapter->pdev->irq);
2603 }
2604 #endif
2605
2606 /**
2607  * ixgbe_probe - Device Initialization Routine
2608  * @pdev: PCI device information struct
2609  * @ent: entry in ixgbe_pci_tbl
2610  *
2611  * Returns 0 on success, negative on failure
2612  *
2613  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
2614  * The OS initialization, configuring of the adapter private structure,
2615  * and a hardware reset occur.
2616  **/
2617 static int __devinit ixgbe_probe(struct pci_dev *pdev,
2618                                  const struct pci_device_id *ent)
2619 {
2620         struct net_device *netdev;
2621         struct ixgbe_adapter *adapter = NULL;
2622         struct ixgbe_hw *hw;
2623         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
2624         unsigned long mmio_start, mmio_len;
2625         static int cards_found;
2626         int i, err, pci_using_dac;
2627         u16 link_status, link_speed, link_width;
2628         u32 part_num;
2629
2630         err = pci_enable_device(pdev);
2631         if (err)
2632                 return err;
2633
2634         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
2635             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
2636                 pci_using_dac = 1;
2637         } else {
2638                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2639                 if (err) {
2640                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2641                         if (err) {
2642                                 dev_err(&pdev->dev, "No usable DMA "
2643                                         "configuration, aborting\n");
2644                                 goto err_dma;
2645                         }
2646                 }
2647                 pci_using_dac = 0;
2648         }
2649
2650         err = pci_request_regions(pdev, ixgbe_driver_name);
2651         if (err) {
2652                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
2653                 goto err_pci_reg;
2654         }
2655
2656         pci_set_master(pdev);
2657
2658         netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
2659         if (!netdev) {
2660                 err = -ENOMEM;
2661                 goto err_alloc_etherdev;
2662         }
2663
2664         SET_NETDEV_DEV(netdev, &pdev->dev);
2665
2666         pci_set_drvdata(pdev, netdev);
2667         adapter = netdev_priv(netdev);
2668
2669         adapter->netdev = netdev;
2670         adapter->pdev = pdev;
2671         hw = &adapter->hw;
2672         hw->back = adapter;
2673         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2674
2675         mmio_start = pci_resource_start(pdev, 0);
2676         mmio_len = pci_resource_len(pdev, 0);
2677
2678         hw->hw_addr = ioremap(mmio_start, mmio_len);
2679         if (!hw->hw_addr) {
2680                 err = -EIO;
2681                 goto err_ioremap;
2682         }
2683
2684         for (i = 1; i <= 5; i++) {
2685                 if (pci_resource_len(pdev, i) == 0)
2686                         continue;
2687         }
2688
2689         netdev->open = &ixgbe_open;
2690         netdev->stop = &ixgbe_close;
2691         netdev->hard_start_xmit = &ixgbe_xmit_frame;
2692         netdev->get_stats = &ixgbe_get_stats;
2693         netdev->set_multicast_list = &ixgbe_set_multi;
2694         netdev->set_mac_address = &ixgbe_set_mac;
2695         netdev->change_mtu = &ixgbe_change_mtu;
2696         ixgbe_set_ethtool_ops(netdev);
2697         netdev->tx_timeout = &ixgbe_tx_timeout;
2698         netdev->watchdog_timeo = 5 * HZ;
2699         netif_napi_add(netdev, &adapter->napi, ixgbe_clean, 64);
2700         netdev->vlan_rx_register = ixgbe_vlan_rx_register;
2701         netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
2702         netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
2703 #ifdef CONFIG_NET_POLL_CONTROLLER
2704         netdev->poll_controller = ixgbe_netpoll;
2705 #endif
2706         strcpy(netdev->name, pci_name(pdev));
2707
2708         netdev->mem_start = mmio_start;
2709         netdev->mem_end = mmio_start + mmio_len;
2710
2711         adapter->bd_number = cards_found;
2712
2713         /* PCI config space info */
2714         hw->vendor_id = pdev->vendor;
2715         hw->device_id = pdev->device;
2716         hw->revision_id = pdev->revision;
2717         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2718         hw->subsystem_device_id = pdev->subsystem_device;
2719
2720         /* Setup hw api */
2721         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
2722
2723         err = ii->get_invariants(hw);
2724         if (err)
2725                 goto err_hw_init;
2726
2727         /* setup the private structure */
2728         err = ixgbe_sw_init(adapter);
2729         if (err)
2730                 goto err_sw_init;
2731
2732         netdev->features = NETIF_F_SG |
2733                            NETIF_F_HW_CSUM |
2734                            NETIF_F_HW_VLAN_TX |
2735                            NETIF_F_HW_VLAN_RX |
2736                            NETIF_F_HW_VLAN_FILTER;
2737
2738         netdev->features |= NETIF_F_TSO;
2739
2740         netdev->features |= NETIF_F_TSO6;
2741         if (pci_using_dac)
2742                 netdev->features |= NETIF_F_HIGHDMA;
2743
2744
2745         /* make sure the EEPROM is good */
2746         if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
2747                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
2748                 err = -EIO;
2749                 goto err_eeprom;
2750         }
2751
2752         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
2753         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
2754
2755         if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
2756                 err = -EIO;
2757                 goto err_eeprom;
2758         }
2759
2760         init_timer(&adapter->watchdog_timer);
2761         adapter->watchdog_timer.function = &ixgbe_watchdog;
2762         adapter->watchdog_timer.data = (unsigned long)adapter;
2763
2764         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
2765
2766         /* initialize default flow control settings */
2767         hw->fc.original_type = ixgbe_fc_full;
2768         hw->fc.type = ixgbe_fc_full;
2769         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2770         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2771         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2772
2773         /* Interrupt Throttle Rate */
2774         adapter->rx_eitr = (1000000 / IXGBE_DEFAULT_ITR_RX_USECS);
2775         adapter->tx_eitr = (1000000 / IXGBE_DEFAULT_ITR_TX_USECS);
2776
2777         /* print bus type/speed/width info */
2778         pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
2779         link_speed = link_status & IXGBE_PCI_LINK_SPEED;
2780         link_width = link_status & IXGBE_PCI_LINK_WIDTH;
2781         dev_info(&pdev->dev, "(PCI Express:%s:%s) "
2782                  "%02x:%02x:%02x:%02x:%02x:%02x\n",
2783                 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
2784                  (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
2785                  "Unknown"),
2786                 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
2787                  (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
2788                  (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
2789                  (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
2790                  "Unknown"),
2791                 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
2792                 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
2793         ixgbe_read_part_num(hw, &part_num);
2794         dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
2795                  hw->mac.type, hw->phy.type,
2796                  (part_num >> 8), (part_num & 0xff));
2797
2798         if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
2799                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
2800                          "this card is not sufficient for optimal "
2801                          "performance.\n");
2802                 dev_warn(&pdev->dev, "For optimal performance a x8 "
2803                          "PCI-Express slot is required.\n");
2804         }
2805
2806         /* reset the hardware with the new settings */
2807         ixgbe_start_hw(hw);
2808
2809         netif_carrier_off(netdev);
2810         netif_stop_queue(netdev);
2811
2812         strcpy(netdev->name, "eth%d");
2813         err = register_netdev(netdev);
2814         if (err)
2815                 goto err_register;
2816
2817
2818         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
2819         cards_found++;
2820         return 0;
2821
2822 err_register:
2823         ixgbe_release_hw_control(adapter);
2824 err_hw_init:
2825 err_sw_init:
2826 err_eeprom:
2827         iounmap(hw->hw_addr);
2828 err_ioremap:
2829         free_netdev(netdev);
2830 err_alloc_etherdev:
2831         pci_release_regions(pdev);
2832 err_pci_reg:
2833 err_dma:
2834         pci_disable_device(pdev);
2835         return err;
2836 }
2837
2838 /**
2839  * ixgbe_remove - Device Removal Routine
2840  * @pdev: PCI device information struct
2841  *
2842  * ixgbe_remove is called by the PCI subsystem to alert the driver
2843  * that it should release a PCI device.  The could be caused by a
2844  * Hot-Plug event, or because the driver is going to be removed from
2845  * memory.
2846  **/
2847 static void __devexit ixgbe_remove(struct pci_dev *pdev)
2848 {
2849         struct net_device *netdev = pci_get_drvdata(pdev);
2850         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2851
2852         set_bit(__IXGBE_DOWN, &adapter->state);
2853         del_timer_sync(&adapter->watchdog_timer);
2854
2855         flush_scheduled_work();
2856
2857         unregister_netdev(netdev);
2858
2859         ixgbe_release_hw_control(adapter);
2860
2861         kfree(adapter->tx_ring);
2862         kfree(adapter->rx_ring);
2863
2864         iounmap(adapter->hw.hw_addr);
2865         pci_release_regions(pdev);
2866
2867         free_netdev(netdev);
2868
2869         pci_disable_device(pdev);
2870 }
2871
2872 /**
2873  * ixgbe_io_error_detected - called when PCI error is detected
2874  * @pdev: Pointer to PCI device
2875  * @state: The current pci connection state
2876  *
2877  * This function is called after a PCI bus error affecting
2878  * this device has been detected.
2879  */
2880 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
2881                                                 pci_channel_state_t state)
2882 {
2883         struct net_device *netdev = pci_get_drvdata(pdev);
2884         struct ixgbe_adapter *adapter = netdev->priv;
2885
2886         netif_device_detach(netdev);
2887
2888         if (netif_running(netdev))
2889                 ixgbe_down(adapter);
2890         pci_disable_device(pdev);
2891
2892         /* Request a slot slot reset. */
2893         return PCI_ERS_RESULT_NEED_RESET;
2894 }
2895
2896 /**
2897  * ixgbe_io_slot_reset - called after the pci bus has been reset.
2898  * @pdev: Pointer to PCI device
2899  *
2900  * Restart the card from scratch, as if from a cold-boot.
2901  */
2902 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
2903 {
2904         struct net_device *netdev = pci_get_drvdata(pdev);
2905         struct ixgbe_adapter *adapter = netdev->priv;
2906
2907         if (pci_enable_device(pdev)) {
2908                 DPRINTK(PROBE, ERR,
2909                         "Cannot re-enable PCI device after reset.\n");
2910                 return PCI_ERS_RESULT_DISCONNECT;
2911         }
2912         pci_set_master(pdev);
2913
2914         pci_enable_wake(pdev, PCI_D3hot, 0);
2915         pci_enable_wake(pdev, PCI_D3cold, 0);
2916
2917         ixgbe_reset(adapter);
2918
2919         return PCI_ERS_RESULT_RECOVERED;
2920 }
2921
2922 /**
2923  * ixgbe_io_resume - called when traffic can start flowing again.
2924  * @pdev: Pointer to PCI device
2925  *
2926  * This callback is called when the error recovery driver tells us that
2927  * its OK to resume normal operation.
2928  */
2929 static void ixgbe_io_resume(struct pci_dev *pdev)
2930 {
2931         struct net_device *netdev = pci_get_drvdata(pdev);
2932         struct ixgbe_adapter *adapter = netdev->priv;
2933
2934         if (netif_running(netdev)) {
2935                 if (ixgbe_up(adapter)) {
2936                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
2937                         return;
2938                 }
2939         }
2940
2941         netif_device_attach(netdev);
2942
2943 }
2944
2945 static struct pci_error_handlers ixgbe_err_handler = {
2946         .error_detected = ixgbe_io_error_detected,
2947         .slot_reset = ixgbe_io_slot_reset,
2948         .resume = ixgbe_io_resume,
2949 };
2950
2951 static struct pci_driver ixgbe_driver = {
2952         .name     = ixgbe_driver_name,
2953         .id_table = ixgbe_pci_tbl,
2954         .probe    = ixgbe_probe,
2955         .remove   = __devexit_p(ixgbe_remove),
2956 #ifdef CONFIG_PM
2957         .suspend  = ixgbe_suspend,
2958         .resume   = ixgbe_resume,
2959 #endif
2960         .shutdown = ixgbe_shutdown,
2961         .err_handler = &ixgbe_err_handler
2962 };
2963
2964 /**
2965  * ixgbe_init_module - Driver Registration Routine
2966  *
2967  * ixgbe_init_module is the first routine called when the driver is
2968  * loaded. All it does is register with the PCI subsystem.
2969  **/
2970 static int __init ixgbe_init_module(void)
2971 {
2972         int ret;
2973         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
2974                ixgbe_driver_string, ixgbe_driver_version);
2975
2976         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
2977
2978         ret = pci_register_driver(&ixgbe_driver);
2979         return ret;
2980 }
2981 module_init(ixgbe_init_module);
2982
2983 /**
2984  * ixgbe_exit_module - Driver Exit Cleanup Routine
2985  *
2986  * ixgbe_exit_module is called just before the driver is removed
2987  * from memory.
2988  **/
2989 static void __exit ixgbe_exit_module(void)
2990 {
2991         pci_unregister_driver(&ixgbe_driver);
2992 }
2993 module_exit(ixgbe_exit_module);
2994
2995 /* ixgbe_main.c */