drivers/net/ixgbe/ixgbe_main.c

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