err.no Git - linux-2.6/blob - drivers/net/ixgb/ixgb_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/10GbE Linux driver
   4   Copyright(c) 1999 - 2006 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 "ixgb.h"
  30
  31 char ixgb_driver_name[] = "ixgb";
  32 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
  33
  34 #ifndef CONFIG_IXGB_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION             "1.0.126-k4"DRIVERNAPI
  40 const char ixgb_driver_version[] = DRV_VERSION;
  41 static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  42
  43 /* ixgb_pci_tbl - PCI Device ID Table
  44  *
  45  * Wildcard entries (PCI_ANY_ID) should come last
  46  * Last entry must be all 0s
  47  *
  48  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  49  *   Class, Class Mask, private data (not used) }
  50  */
  51 static struct pci_device_id ixgb_pci_tbl[] = {
  52         {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX,
  53          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  54         {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_CX4,
  55          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  56         {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_SR,
  57          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  58         {INTEL_VENDOR_ID, IXGB_DEVICE_ID_82597EX_LR,
  59          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  60
  61         /* required last entry */
  62         {0,}
  63 };
  64
  65 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
  66
  67 /* Local Function Prototypes */
  68
  69 int ixgb_up(struct ixgb_adapter *adapter);
  70 void ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog);
  71 void ixgb_reset(struct ixgb_adapter *adapter);
  72 int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
  73 int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
  74 void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
  75 void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
  76 void ixgb_update_stats(struct ixgb_adapter *adapter);
  77
  78 static int ixgb_init_module(void);
  79 static void ixgb_exit_module(void);
  80 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
  81 static void __devexit ixgb_remove(struct pci_dev *pdev);
  82 static int ixgb_sw_init(struct ixgb_adapter *adapter);
  83 static int ixgb_open(struct net_device *netdev);
  84 static int ixgb_close(struct net_device *netdev);
  85 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
  86 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
  87 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
  88 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
  89 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
  90 static void ixgb_set_multi(struct net_device *netdev);
  91 static void ixgb_watchdog(unsigned long data);
  92 static int ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
  93 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
  94 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
  95 static int ixgb_set_mac(struct net_device *netdev, void *p);
  96 static irqreturn_t ixgb_intr(int irq, void *data);
  97 static boolean_t ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
  98
  99 #ifdef CONFIG_IXGB_NAPI
 100 static int ixgb_clean(struct napi_struct *napi, int budget);
 101 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter,
 102                                    int *work_done, int work_to_do);
 103 #else
 104 static boolean_t ixgb_clean_rx_irq(struct ixgb_adapter *adapter);
 105 #endif
 106 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter);
 107 static void ixgb_tx_timeout(struct net_device *dev);
 108 static void ixgb_tx_timeout_task(struct work_struct *work);
 109 static void ixgb_vlan_rx_register(struct net_device *netdev,
 110                                   struct vlan_group *grp);
 111 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 112 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 113 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
 114
 115 #ifdef CONFIG_NET_POLL_CONTROLLER
 116 /* for netdump / net console */
 117 static void ixgb_netpoll(struct net_device *dev);
 118 #endif
 119
 120 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
 121                              enum pci_channel_state state);
 122 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
 123 static void ixgb_io_resume (struct pci_dev *pdev);
 124
 125 static struct pci_error_handlers ixgb_err_handler = {
 126         .error_detected = ixgb_io_error_detected,
 127         .slot_reset = ixgb_io_slot_reset,
 128         .resume = ixgb_io_resume,
 129 };
 130
 131 static struct pci_driver ixgb_driver = {
 132         .name     = ixgb_driver_name,
 133         .id_table = ixgb_pci_tbl,
 134         .probe    = ixgb_probe,
 135         .remove   = __devexit_p(ixgb_remove),
 136         .err_handler = &ixgb_err_handler
 137 };
 138
 139 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 140 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
 141 MODULE_LICENSE("GPL");
 142 MODULE_VERSION(DRV_VERSION);
 143
 144 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 145 static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
 146 module_param(debug, int, 0);
 147 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 148
 149 /* some defines for controlling descriptor fetches in h/w */
 150 #define RXDCTL_WTHRESH_DEFAULT 15  /* chip writes back at this many or RXT0 */
 151 #define RXDCTL_PTHRESH_DEFAULT 0   /* chip considers prefech below
 152                                     * this */
 153 #define RXDCTL_HTHRESH_DEFAULT 0   /* chip will only prefetch if tail
 154                                     * is pushed this many descriptors
 155                                     * from head */
 156
 157 /**
 158  * ixgb_init_module - Driver Registration Routine
 159  *
 160  * ixgb_init_module is the first routine called when the driver is
 161  * loaded. All it does is register with the PCI subsystem.
 162  **/
 163
 164 static int __init
 165 ixgb_init_module(void)
 166 {
 167         printk(KERN_INFO "%s - version %s\n",
 168                ixgb_driver_string, ixgb_driver_version);
 169
 170         printk(KERN_INFO "%s\n", ixgb_copyright);
 171
 172         return pci_register_driver(&ixgb_driver);
 173 }
 174
 175 module_init(ixgb_init_module);
 176
 177 /**
 178  * ixgb_exit_module - Driver Exit Cleanup Routine
 179  *
 180  * ixgb_exit_module is called just before the driver is removed
 181  * from memory.
 182  **/
 183
 184 static void __exit
 185 ixgb_exit_module(void)
 186 {
 187         pci_unregister_driver(&ixgb_driver);
 188 }
 189
 190 module_exit(ixgb_exit_module);
 191
 192 /**
 193  * ixgb_irq_disable - Mask off interrupt generation on the NIC
 194  * @adapter: board private structure
 195  **/
 196
 197 static void
 198 ixgb_irq_disable(struct ixgb_adapter *adapter)
 199 {
 200         atomic_inc(&adapter->irq_sem);
 201         IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
 202         IXGB_WRITE_FLUSH(&adapter->hw);
 203         synchronize_irq(adapter->pdev->irq);
 204 }
 205
 206 /**
 207  * ixgb_irq_enable - Enable default interrupt generation settings
 208  * @adapter: board private structure
 209  **/
 210
 211 static void
 212 ixgb_irq_enable(struct ixgb_adapter *adapter)
 213 {
 214         if(atomic_dec_and_test(&adapter->irq_sem)) {
 215                 u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
 216                           IXGB_INT_TXDW | IXGB_INT_LSC;
 217                 if (adapter->hw.subsystem_vendor_id == SUN_SUBVENDOR_ID)
 218                         val |= IXGB_INT_GPI0;
 219                 IXGB_WRITE_REG(&adapter->hw, IMS, val);
 220                 IXGB_WRITE_FLUSH(&adapter->hw);
 221         }
 222 }
 223
 224 int
 225 ixgb_up(struct ixgb_adapter *adapter)
 226 {
 227         struct net_device *netdev = adapter->netdev;
 228         int err, irq_flags = IRQF_SHARED;
 229         int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 230         struct ixgb_hw *hw = &adapter->hw;
 231
 232         /* hardware has been reset, we need to reload some things */
 233
 234         ixgb_rar_set(hw, netdev->dev_addr, 0);
 235         ixgb_set_multi(netdev);
 236
 237         ixgb_restore_vlan(adapter);
 238
 239         ixgb_configure_tx(adapter);
 240         ixgb_setup_rctl(adapter);
 241         ixgb_configure_rx(adapter);
 242         ixgb_alloc_rx_buffers(adapter);
 243
 244         /* disable interrupts and get the hardware into a known state */
 245         IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
 246
 247         /* only enable MSI if bus is in PCI-X mode */
 248         if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
 249                 err = pci_enable_msi(adapter->pdev);
 250                 if (!err) {
 251                         adapter->have_msi = 1;
 252                         irq_flags = 0;
 253                 }
 254                 /* proceed to try to request regular interrupt */
 255         }
 256
 257         err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
 258                           netdev->name, netdev);
 259         if (err) {
 260                 if (adapter->have_msi)
 261                         pci_disable_msi(adapter->pdev);
 262                 DPRINTK(PROBE, ERR,
 263                  "Unable to allocate interrupt Error: %d\n", err);
 264                 return err;
 265         }
 266
 267         if((hw->max_frame_size != max_frame) ||
 268                 (hw->max_frame_size !=
 269                 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
 270
 271                 hw->max_frame_size = max_frame;
 272
 273                 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
 274
 275                 if(hw->max_frame_size >
 276                    IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
 277                         uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
 278
 279                         if(!(ctrl0 & IXGB_CTRL0_JFE)) {
 280                                 ctrl0 |= IXGB_CTRL0_JFE;
 281                                 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
 282                         }
 283                 }
 284         }
 285
 286         clear_bit(__IXGB_DOWN, &adapter->flags);
 287
 288 #ifdef CONFIG_IXGB_NAPI
 289         napi_enable(&adapter->napi);
 290 #endif
 291         ixgb_irq_enable(adapter);
 292
 293         mod_timer(&adapter->watchdog_timer, jiffies);
 294
 295         return 0;
 296 }
 297
 298 void
 299 ixgb_down(struct ixgb_adapter *adapter, boolean_t kill_watchdog)
 300 {
 301         struct net_device *netdev = adapter->netdev;
 302
 303         /* prevent the interrupt handler from restarting watchdog */
 304         set_bit(__IXGB_DOWN, &adapter->flags);
 305
 306 #ifdef CONFIG_IXGB_NAPI
 307         napi_disable(&adapter->napi);
 308         atomic_set(&adapter->irq_sem, 0);
 309 #endif
 310         /* waiting for NAPI to complete can re-enable interrupts */
 311         ixgb_irq_disable(adapter);
 312         free_irq(adapter->pdev->irq, netdev);
 313
 314         if (adapter->have_msi)
 315                 pci_disable_msi(adapter->pdev);
 316
 317         if(kill_watchdog)
 318                 del_timer_sync(&adapter->watchdog_timer);
 319
 320         adapter->link_speed = 0;
 321         adapter->link_duplex = 0;
 322         netif_carrier_off(netdev);
 323         netif_stop_queue(netdev);
 324
 325         ixgb_reset(adapter);
 326         ixgb_clean_tx_ring(adapter);
 327         ixgb_clean_rx_ring(adapter);
 328 }
 329
 330 void
 331 ixgb_reset(struct ixgb_adapter *adapter)
 332 {
 333         struct ixgb_hw *hw = &adapter->hw;
 334
 335         ixgb_adapter_stop(hw);
 336         if (!ixgb_init_hw(hw))
 337                 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
 338
 339         /* restore frame size information */
 340         IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
 341         if (hw->max_frame_size >
 342             IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
 343                 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
 344                 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
 345                         ctrl0 |= IXGB_CTRL0_JFE;
 346                         IXGB_WRITE_REG(hw, CTRL0, ctrl0);
 347                 }
 348         }
 349 }
 350
 351 /**
 352  * ixgb_probe - Device Initialization Routine
 353  * @pdev: PCI device information struct
 354  * @ent: entry in ixgb_pci_tbl
 355  *
 356  * Returns 0 on success, negative on failure
 357  *
 358  * ixgb_probe initializes an adapter identified by a pci_dev structure.
 359  * The OS initialization, configuring of the adapter private structure,
 360  * and a hardware reset occur.
 361  **/
 362
 363 static int __devinit
 364 ixgb_probe(struct pci_dev *pdev,
 365                 const struct pci_device_id *ent)
 366 {
 367         struct net_device *netdev = NULL;
 368         struct ixgb_adapter *adapter;
 369         static int cards_found = 0;
 370         unsigned long mmio_start;
 371         int mmio_len;
 372         int pci_using_dac;
 373         int i;
 374         int err;
 375
 376         if((err = pci_enable_device(pdev)))
 377                 return err;
 378
 379         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 380            !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 381                 pci_using_dac = 1;
 382         } else {
 383                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
 384                    (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 385                         printk(KERN_ERR
 386                          "ixgb: No usable DMA configuration, aborting\n");
 387                         goto err_dma_mask;
 388                 }
 389                 pci_using_dac = 0;
 390         }
 391
 392         if((err = pci_request_regions(pdev, ixgb_driver_name)))
 393                 goto err_request_regions;
 394
 395         pci_set_master(pdev);
 396
 397         netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
 398         if(!netdev) {
 399                 err = -ENOMEM;
 400                 goto err_alloc_etherdev;
 401         }
 402
 403         SET_NETDEV_DEV(netdev, &pdev->dev);
 404
 405         pci_set_drvdata(pdev, netdev);
 406         adapter = netdev_priv(netdev);
 407         adapter->netdev = netdev;
 408         adapter->pdev = pdev;
 409         adapter->hw.back = adapter;
 410         adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
 411
 412         mmio_start = pci_resource_start(pdev, BAR_0);
 413         mmio_len = pci_resource_len(pdev, BAR_0);
 414
 415         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 416         if(!adapter->hw.hw_addr) {
 417                 err = -EIO;
 418                 goto err_ioremap;
 419         }
 420
 421         for(i = BAR_1; i <= BAR_5; i++) {
 422                 if(pci_resource_len(pdev, i) == 0)
 423                         continue;
 424                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 425                         adapter->hw.io_base = pci_resource_start(pdev, i);
 426                         break;
 427                 }
 428         }
 429
 430         netdev->open = &ixgb_open;
 431         netdev->stop = &ixgb_close;
 432         netdev->hard_start_xmit = &ixgb_xmit_frame;
 433         netdev->get_stats = &ixgb_get_stats;
 434         netdev->set_multicast_list = &ixgb_set_multi;
 435         netdev->set_mac_address = &ixgb_set_mac;
 436         netdev->change_mtu = &ixgb_change_mtu;
 437         ixgb_set_ethtool_ops(netdev);
 438         netdev->tx_timeout = &ixgb_tx_timeout;
 439         netdev->watchdog_timeo = 5 * HZ;
 440 #ifdef CONFIG_IXGB_NAPI
 441         netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
 442 #endif
 443         netdev->vlan_rx_register = ixgb_vlan_rx_register;
 444         netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
 445         netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
 446 #ifdef CONFIG_NET_POLL_CONTROLLER
 447         netdev->poll_controller = ixgb_netpoll;
 448 #endif
 449
 450         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 451         netdev->mem_start = mmio_start;
 452         netdev->mem_end = mmio_start + mmio_len;
 453         netdev->base_addr = adapter->hw.io_base;
 454
 455         adapter->bd_number = cards_found;
 456         adapter->link_speed = 0;
 457         adapter->link_duplex = 0;
 458
 459         /* setup the private structure */
 460
 461         if((err = ixgb_sw_init(adapter)))
 462                 goto err_sw_init;
 463
 464         netdev->features = NETIF_F_SG |
 465                            NETIF_F_HW_CSUM |
 466                            NETIF_F_HW_VLAN_TX |
 467                            NETIF_F_HW_VLAN_RX |
 468                            NETIF_F_HW_VLAN_FILTER;
 469         netdev->features |= NETIF_F_TSO;
 470 #ifdef NETIF_F_LLTX
 471         netdev->features |= NETIF_F_LLTX;
 472 #endif
 473
 474         if(pci_using_dac)
 475                 netdev->features |= NETIF_F_HIGHDMA;
 476
 477         /* make sure the EEPROM is good */
 478
 479         if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
 480                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 481                 err = -EIO;
 482                 goto err_eeprom;
 483         }
 484
 485         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
 486         memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
 487
 488         if(!is_valid_ether_addr(netdev->perm_addr)) {
 489                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 490                 err = -EIO;
 491                 goto err_eeprom;
 492         }
 493
 494         adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
 495
 496         init_timer(&adapter->watchdog_timer);
 497         adapter->watchdog_timer.function = &ixgb_watchdog;
 498         adapter->watchdog_timer.data = (unsigned long)adapter;
 499
 500         INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
 501
 502         strcpy(netdev->name, "eth%d");
 503         if((err = register_netdev(netdev)))
 504                 goto err_register;
 505
 506         /* we're going to reset, so assume we have no link for now */
 507
 508         netif_carrier_off(netdev);
 509         netif_stop_queue(netdev);
 510
 511         DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
 512         ixgb_check_options(adapter);
 513         /* reset the hardware with the new settings */
 514
 515         ixgb_reset(adapter);
 516
 517         cards_found++;
 518         return 0;
 519
 520 err_register:
 521 err_sw_init:
 522 err_eeprom:
 523         iounmap(adapter->hw.hw_addr);
 524 err_ioremap:
 525         free_netdev(netdev);
 526 err_alloc_etherdev:
 527         pci_release_regions(pdev);
 528 err_request_regions:
 529 err_dma_mask:
 530         pci_disable_device(pdev);
 531         return err;
 532 }
 533
 534 /**
 535  * ixgb_remove - Device Removal Routine
 536  * @pdev: PCI device information struct
 537  *
 538  * ixgb_remove is called by the PCI subsystem to alert the driver
 539  * that it should release a PCI device.  The could be caused by a
 540  * Hot-Plug event, or because the driver is going to be removed from
 541  * memory.
 542  **/
 543
 544 static void __devexit
 545 ixgb_remove(struct pci_dev *pdev)
 546 {
 547         struct net_device *netdev = pci_get_drvdata(pdev);
 548         struct ixgb_adapter *adapter = netdev_priv(netdev);
 549
 550         unregister_netdev(netdev);
 551
 552         iounmap(adapter->hw.hw_addr);
 553         pci_release_regions(pdev);
 554
 555         free_netdev(netdev);
 556 }
 557
 558 /**
 559  * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
 560  * @adapter: board private structure to initialize
 561  *
 562  * ixgb_sw_init initializes the Adapter private data structure.
 563  * Fields are initialized based on PCI device information and
 564  * OS network device settings (MTU size).
 565  **/
 566
 567 static int __devinit
 568 ixgb_sw_init(struct ixgb_adapter *adapter)
 569 {
 570         struct ixgb_hw *hw = &adapter->hw;
 571         struct net_device *netdev = adapter->netdev;
 572         struct pci_dev *pdev = adapter->pdev;
 573
 574         /* PCI config space info */
 575
 576         hw->vendor_id = pdev->vendor;
 577         hw->device_id = pdev->device;
 578         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 579         hw->subsystem_id = pdev->subsystem_device;
 580
 581         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 582         adapter->rx_buffer_len = hw->max_frame_size;
 583
 584         if((hw->device_id == IXGB_DEVICE_ID_82597EX)
 585            || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
 586            || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
 587            || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
 588                         hw->mac_type = ixgb_82597;
 589         else {
 590                 /* should never have loaded on this device */
 591                 DPRINTK(PROBE, ERR, "unsupported device id\n");
 592         }
 593
 594         /* enable flow control to be programmed */
 595         hw->fc.send_xon = 1;
 596
 597         atomic_set(&adapter->irq_sem, 1);
 598         spin_lock_init(&adapter->tx_lock);
 599
 600         set_bit(__IXGB_DOWN, &adapter->flags);
 601         return 0;
 602 }
 603
 604 /**
 605  * ixgb_open - Called when a network interface is made active
 606  * @netdev: network interface device structure
 607  *
 608  * Returns 0 on success, negative value on failure
 609  *
 610  * The open entry point is called when a network interface is made
 611  * active by the system (IFF_UP).  At this point all resources needed
 612  * for transmit and receive operations are allocated, the interrupt
 613  * handler is registered with the OS, the watchdog timer is started,
 614  * and the stack is notified that the interface is ready.
 615  **/
 616
 617 static int
 618 ixgb_open(struct net_device *netdev)
 619 {
 620         struct ixgb_adapter *adapter = netdev_priv(netdev);
 621         int err;
 622
 623         /* allocate transmit descriptors */
 624
 625         if((err = ixgb_setup_tx_resources(adapter)))
 626                 goto err_setup_tx;
 627
 628         /* allocate receive descriptors */
 629
 630         if((err = ixgb_setup_rx_resources(adapter)))
 631                 goto err_setup_rx;
 632
 633         if((err = ixgb_up(adapter)))
 634                 goto err_up;
 635
 636         return 0;
 637
 638 err_up:
 639         ixgb_free_rx_resources(adapter);
 640 err_setup_rx:
 641         ixgb_free_tx_resources(adapter);
 642 err_setup_tx:
 643         ixgb_reset(adapter);
 644
 645         return err;
 646 }
 647
 648 /**
 649  * ixgb_close - Disables a network interface
 650  * @netdev: network interface device structure
 651  *
 652  * Returns 0, this is not allowed to fail
 653  *
 654  * The close entry point is called when an interface is de-activated
 655  * by the OS.  The hardware is still under the drivers control, but
 656  * needs to be disabled.  A global MAC reset is issued to stop the
 657  * hardware, and all transmit and receive resources are freed.
 658  **/
 659
 660 static int
 661 ixgb_close(struct net_device *netdev)
 662 {
 663         struct ixgb_adapter *adapter = netdev_priv(netdev);
 664
 665         ixgb_down(adapter, TRUE);
 666
 667         ixgb_free_tx_resources(adapter);
 668         ixgb_free_rx_resources(adapter);
 669
 670         return 0;
 671 }
 672
 673 /**
 674  * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
 675  * @adapter: board private structure
 676  *
 677  * Return 0 on success, negative on failure
 678  **/
 679
 680 int
 681 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
 682 {
 683         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
 684         struct pci_dev *pdev = adapter->pdev;
 685         int size;
 686
 687         size = sizeof(struct ixgb_buffer) * txdr->count;
 688         txdr->buffer_info = vmalloc(size);
 689         if(!txdr->buffer_info) {
 690                 DPRINTK(PROBE, ERR,
 691                  "Unable to allocate transmit descriptor ring memory\n");
 692                 return -ENOMEM;
 693         }
 694         memset(txdr->buffer_info, 0, size);
 695
 696         /* round up to nearest 4K */
 697
 698         txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
 699         txdr->size = ALIGN(txdr->size, 4096);
 700
 701         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 702         if(!txdr->desc) {
 703                 vfree(txdr->buffer_info);
 704                 DPRINTK(PROBE, ERR,
 705                  "Unable to allocate transmit descriptor memory\n");
 706                 return -ENOMEM;
 707         }
 708         memset(txdr->desc, 0, txdr->size);
 709
 710         txdr->next_to_use = 0;
 711         txdr->next_to_clean = 0;
 712
 713         return 0;
 714 }
 715
 716 /**
 717  * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
 718  * @adapter: board private structure
 719  *
 720  * Configure the Tx unit of the MAC after a reset.
 721  **/
 722
 723 static void
 724 ixgb_configure_tx(struct ixgb_adapter *adapter)
 725 {
 726         uint64_t tdba = adapter->tx_ring.dma;
 727         uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
 728         uint32_t tctl;
 729         struct ixgb_hw *hw = &adapter->hw;
 730
 731         /* Setup the Base and Length of the Tx Descriptor Ring
 732          * tx_ring.dma can be either a 32 or 64 bit value
 733          */
 734
 735         IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
 736         IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
 737
 738         IXGB_WRITE_REG(hw, TDLEN, tdlen);
 739
 740         /* Setup the HW Tx Head and Tail descriptor pointers */
 741
 742         IXGB_WRITE_REG(hw, TDH, 0);
 743         IXGB_WRITE_REG(hw, TDT, 0);
 744
 745         /* don't set up txdctl, it induces performance problems if configured
 746          * incorrectly */
 747         /* Set the Tx Interrupt Delay register */
 748
 749         IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
 750
 751         /* Program the Transmit Control Register */
 752
 753         tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
 754         IXGB_WRITE_REG(hw, TCTL, tctl);
 755
 756         /* Setup Transmit Descriptor Settings for this adapter */
 757         adapter->tx_cmd_type =
 758                 IXGB_TX_DESC_TYPE
 759                 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
 760 }
 761
 762 /**
 763  * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
 764  * @adapter: board private structure
 765  *
 766  * Returns 0 on success, negative on failure
 767  **/
 768
 769 int
 770 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
 771 {
 772         struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
 773         struct pci_dev *pdev = adapter->pdev;
 774         int size;
 775
 776         size = sizeof(struct ixgb_buffer) * rxdr->count;
 777         rxdr->buffer_info = vmalloc(size);
 778         if(!rxdr->buffer_info) {
 779                 DPRINTK(PROBE, ERR,
 780                  "Unable to allocate receive descriptor ring\n");
 781                 return -ENOMEM;
 782         }
 783         memset(rxdr->buffer_info, 0, size);
 784
 785         /* Round up to nearest 4K */
 786
 787         rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
 788         rxdr->size = ALIGN(rxdr->size, 4096);
 789
 790         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
 791
 792         if(!rxdr->desc) {
 793                 vfree(rxdr->buffer_info);
 794                 DPRINTK(PROBE, ERR,
 795                  "Unable to allocate receive descriptors\n");
 796                 return -ENOMEM;
 797         }
 798         memset(rxdr->desc, 0, rxdr->size);
 799
 800         rxdr->next_to_clean = 0;
 801         rxdr->next_to_use = 0;
 802
 803         return 0;
 804 }
 805
 806 /**
 807  * ixgb_setup_rctl - configure the receive control register
 808  * @adapter: Board private structure
 809  **/
 810
 811 static void
 812 ixgb_setup_rctl(struct ixgb_adapter *adapter)
 813 {
 814         uint32_t rctl;
 815
 816         rctl = IXGB_READ_REG(&adapter->hw, RCTL);
 817
 818         rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
 819
 820         rctl |=
 821                 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
 822                 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
 823                 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
 824
 825         rctl |= IXGB_RCTL_SECRC;
 826
 827         if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
 828                 rctl |= IXGB_RCTL_BSIZE_2048;
 829         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
 830                 rctl |= IXGB_RCTL_BSIZE_4096;
 831         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
 832                 rctl |= IXGB_RCTL_BSIZE_8192;
 833         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
 834                 rctl |= IXGB_RCTL_BSIZE_16384;
 835
 836         IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
 837 }
 838
 839 /**
 840  * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
 841  * @adapter: board private structure
 842  *
 843  * Configure the Rx unit of the MAC after a reset.
 844  **/
 845
 846 static void
 847 ixgb_configure_rx(struct ixgb_adapter *adapter)
 848 {
 849         uint64_t rdba = adapter->rx_ring.dma;
 850         uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
 851         struct ixgb_hw *hw = &adapter->hw;
 852         uint32_t rctl;
 853         uint32_t rxcsum;
 854         uint32_t rxdctl;
 855
 856         /* make sure receives are disabled while setting up the descriptors */
 857
 858         rctl = IXGB_READ_REG(hw, RCTL);
 859         IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
 860
 861         /* set the Receive Delay Timer Register */
 862
 863         IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
 864
 865         /* Setup the Base and Length of the Rx Descriptor Ring */
 866
 867         IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
 868         IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
 869
 870         IXGB_WRITE_REG(hw, RDLEN, rdlen);
 871
 872         /* Setup the HW Rx Head and Tail Descriptor Pointers */
 873         IXGB_WRITE_REG(hw, RDH, 0);
 874         IXGB_WRITE_REG(hw, RDT, 0);
 875
 876         /* set up pre-fetching of receive buffers so we get some before we
 877          * run out (default hardware behavior is to run out before fetching
 878          * more).  This sets up to fetch if HTHRESH rx descriptors are avail
 879          * and the descriptors in hw cache are below PTHRESH.  This avoids
 880          * the hardware behavior of fetching <=512 descriptors in a single
 881          * burst that pre-empts all other activity, usually causing fifo
 882          * overflows. */
 883         /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
 884         rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
 885                  RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
 886                  RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
 887         IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
 888
 889         /* Enable Receive Checksum Offload for TCP and UDP */
 890         if(adapter->rx_csum == TRUE) {
 891                 rxcsum = IXGB_READ_REG(hw, RXCSUM);
 892                 rxcsum |= IXGB_RXCSUM_TUOFL;
 893                 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
 894         }
 895
 896         /* Enable Receives */
 897
 898         IXGB_WRITE_REG(hw, RCTL, rctl);
 899 }
 900
 901 /**
 902  * ixgb_free_tx_resources - Free Tx Resources
 903  * @adapter: board private structure
 904  *
 905  * Free all transmit software resources
 906  **/
 907
 908 void
 909 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
 910 {
 911         struct pci_dev *pdev = adapter->pdev;
 912
 913         ixgb_clean_tx_ring(adapter);
 914
 915         vfree(adapter->tx_ring.buffer_info);
 916         adapter->tx_ring.buffer_info = NULL;
 917
 918         pci_free_consistent(pdev, adapter->tx_ring.size,
 919                             adapter->tx_ring.desc, adapter->tx_ring.dma);
 920
 921         adapter->tx_ring.desc = NULL;
 922 }
 923
 924 static void
 925 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
 926                                         struct ixgb_buffer *buffer_info)
 927 {
 928         struct pci_dev *pdev = adapter->pdev;
 929
 930         if (buffer_info->dma)
 931                 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
 932                                PCI_DMA_TODEVICE);
 933
 934         if (buffer_info->skb)
 935                 dev_kfree_skb_any(buffer_info->skb);
 936
 937         buffer_info->skb = NULL;
 938         buffer_info->dma = 0;
 939         buffer_info->time_stamp = 0;
 940         /* these fields must always be initialized in tx
 941          * buffer_info->length = 0;
 942          * buffer_info->next_to_watch = 0; */
 943 }
 944
 945 /**
 946  * ixgb_clean_tx_ring - Free Tx Buffers
 947  * @adapter: board private structure
 948  **/
 949
 950 static void
 951 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
 952 {
 953         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
 954         struct ixgb_buffer *buffer_info;
 955         unsigned long size;
 956         unsigned int i;
 957
 958         /* Free all the Tx ring sk_buffs */
 959
 960         for(i = 0; i < tx_ring->count; i++) {
 961                 buffer_info = &tx_ring->buffer_info[i];
 962                 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
 963         }
 964
 965         size = sizeof(struct ixgb_buffer) * tx_ring->count;
 966         memset(tx_ring->buffer_info, 0, size);
 967
 968         /* Zero out the descriptor ring */
 969
 970         memset(tx_ring->desc, 0, tx_ring->size);
 971
 972         tx_ring->next_to_use = 0;
 973         tx_ring->next_to_clean = 0;
 974
 975         IXGB_WRITE_REG(&adapter->hw, TDH, 0);
 976         IXGB_WRITE_REG(&adapter->hw, TDT, 0);
 977 }
 978
 979 /**
 980  * ixgb_free_rx_resources - Free Rx Resources
 981  * @adapter: board private structure
 982  *
 983  * Free all receive software resources
 984  **/
 985
 986 void
 987 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
 988 {
 989         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
 990         struct pci_dev *pdev = adapter->pdev;
 991
 992         ixgb_clean_rx_ring(adapter);
 993
 994         vfree(rx_ring->buffer_info);
 995         rx_ring->buffer_info = NULL;
 996
 997         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
 998
 999         rx_ring->desc = NULL;
1000 }
1001
1002 /**
1003  * ixgb_clean_rx_ring - Free Rx Buffers
1004  * @adapter: board private structure
1005  **/
1006
1007 static void
1008 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1009 {
1010         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1011         struct ixgb_buffer *buffer_info;
1012         struct pci_dev *pdev = adapter->pdev;
1013         unsigned long size;
1014         unsigned int i;
1015
1016         /* Free all the Rx ring sk_buffs */
1017
1018         for(i = 0; i < rx_ring->count; i++) {
1019                 buffer_info = &rx_ring->buffer_info[i];
1020                 if(buffer_info->skb) {
1021
1022                         pci_unmap_single(pdev,
1023                                          buffer_info->dma,
1024                                          buffer_info->length,
1025                                          PCI_DMA_FROMDEVICE);
1026
1027                         dev_kfree_skb(buffer_info->skb);
1028
1029                         buffer_info->skb = NULL;
1030                 }
1031         }
1032
1033         size = sizeof(struct ixgb_buffer) * rx_ring->count;
1034         memset(rx_ring->buffer_info, 0, size);
1035
1036         /* Zero out the descriptor ring */
1037
1038         memset(rx_ring->desc, 0, rx_ring->size);
1039
1040         rx_ring->next_to_clean = 0;
1041         rx_ring->next_to_use = 0;
1042
1043         IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1044         IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1045 }
1046
1047 /**
1048  * ixgb_set_mac - Change the Ethernet Address of the NIC
1049  * @netdev: network interface device structure
1050  * @p: pointer to an address structure
1051  *
1052  * Returns 0 on success, negative on failure
1053  **/
1054
1055 static int
1056 ixgb_set_mac(struct net_device *netdev, void *p)
1057 {
1058         struct ixgb_adapter *adapter = netdev_priv(netdev);
1059         struct sockaddr *addr = p;
1060
1061         if(!is_valid_ether_addr(addr->sa_data))
1062                 return -EADDRNOTAVAIL;
1063
1064         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1065
1066         ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1067
1068         return 0;
1069 }
1070
1071 /**
1072  * ixgb_set_multi - Multicast and Promiscuous mode set
1073  * @netdev: network interface device structure
1074  *
1075  * The set_multi entry point is called whenever the multicast address
1076  * list or the network interface flags are updated.  This routine is
1077  * responsible for configuring the hardware for proper multicast,
1078  * promiscuous mode, and all-multi behavior.
1079  **/
1080
1081 static void
1082 ixgb_set_multi(struct net_device *netdev)
1083 {
1084         struct ixgb_adapter *adapter = netdev_priv(netdev);
1085         struct ixgb_hw *hw = &adapter->hw;
1086         struct dev_mc_list *mc_ptr;
1087         uint32_t rctl;
1088         int i;
1089
1090         /* Check for Promiscuous and All Multicast modes */
1091
1092         rctl = IXGB_READ_REG(hw, RCTL);
1093
1094         if(netdev->flags & IFF_PROMISC) {
1095                 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1096         } else if(netdev->flags & IFF_ALLMULTI) {
1097                 rctl |= IXGB_RCTL_MPE;
1098                 rctl &= ~IXGB_RCTL_UPE;
1099         } else {
1100                 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1101         }
1102
1103         if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1104                 rctl |= IXGB_RCTL_MPE;
1105                 IXGB_WRITE_REG(hw, RCTL, rctl);
1106         } else {
1107                 uint8_t mta[IXGB_MAX_NUM_MULTICAST_ADDRESSES *
1108                             IXGB_ETH_LENGTH_OF_ADDRESS];
1109
1110                 IXGB_WRITE_REG(hw, RCTL, rctl);
1111
1112                 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1113                         i++, mc_ptr = mc_ptr->next)
1114                         memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1115                                    mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1116
1117                 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1118         }
1119 }
1120
1121 /**
1122  * ixgb_watchdog - Timer Call-back
1123  * @data: pointer to netdev cast into an unsigned long
1124  **/
1125
1126 static void
1127 ixgb_watchdog(unsigned long data)
1128 {
1129         struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1130         struct net_device *netdev = adapter->netdev;
1131         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1132
1133         ixgb_check_for_link(&adapter->hw);
1134
1135         if (ixgb_check_for_bad_link(&adapter->hw)) {
1136                 /* force the reset path */
1137                 netif_stop_queue(netdev);
1138         }
1139
1140         if(adapter->hw.link_up) {
1141                 if(!netif_carrier_ok(netdev)) {
1142                         DPRINTK(LINK, INFO,
1143                                 "NIC Link is Up 10000 Mbps Full Duplex\n");
1144                         adapter->link_speed = 10000;
1145                         adapter->link_duplex = FULL_DUPLEX;
1146                         netif_carrier_on(netdev);
1147                         netif_wake_queue(netdev);
1148                 }
1149         } else {
1150                 if(netif_carrier_ok(netdev)) {
1151                         adapter->link_speed = 0;
1152                         adapter->link_duplex = 0;
1153                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
1154                         netif_carrier_off(netdev);
1155                         netif_stop_queue(netdev);
1156
1157                 }
1158         }
1159
1160         ixgb_update_stats(adapter);
1161
1162         if(!netif_carrier_ok(netdev)) {
1163                 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1164                         /* We've lost link, so the controller stops DMA,
1165                          * but we've got queued Tx work that's never going
1166                          * to get done, so reset controller to flush Tx.
1167                          * (Do the reset outside of interrupt context). */
1168                         schedule_work(&adapter->tx_timeout_task);
1169                 }
1170         }
1171
1172         /* Force detection of hung controller every watchdog period */
1173         adapter->detect_tx_hung = TRUE;
1174
1175         /* generate an interrupt to force clean up of any stragglers */
1176         IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1177
1178         /* Reset the timer */
1179         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1180 }
1181
1182 #define IXGB_TX_FLAGS_CSUM              0x00000001
1183 #define IXGB_TX_FLAGS_VLAN              0x00000002
1184 #define IXGB_TX_FLAGS_TSO               0x00000004
1185
1186 static int
1187 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1188 {
1189         struct ixgb_context_desc *context_desc;
1190         unsigned int i;
1191         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1192         uint16_t ipcse, tucse, mss;
1193         int err;
1194
1195         if (likely(skb_is_gso(skb))) {
1196                 struct ixgb_buffer *buffer_info;
1197                 struct iphdr *iph;
1198
1199                 if (skb_header_cloned(skb)) {
1200                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1201                         if (err)
1202                                 return err;
1203                 }
1204
1205                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1206                 mss = skb_shinfo(skb)->gso_size;
1207                 iph = ip_hdr(skb);
1208                 iph->tot_len = 0;
1209                 iph->check = 0;
1210                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1211                                                          iph->daddr, 0,
1212                                                          IPPROTO_TCP, 0);
1213                 ipcss = skb_network_offset(skb);
1214                 ipcso = (void *)&(iph->check) - (void *)skb->data;
1215                 ipcse = skb_transport_offset(skb) - 1;
1216                 tucss = skb_transport_offset(skb);
1217                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1218                 tucse = 0;
1219
1220                 i = adapter->tx_ring.next_to_use;
1221                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1222                 buffer_info = &adapter->tx_ring.buffer_info[i];
1223                 WARN_ON(buffer_info->dma != 0);
1224
1225                 context_desc->ipcss = ipcss;
1226                 context_desc->ipcso = ipcso;
1227                 context_desc->ipcse = cpu_to_le16(ipcse);
1228                 context_desc->tucss = tucss;
1229                 context_desc->tucso = tucso;
1230                 context_desc->tucse = cpu_to_le16(tucse);
1231                 context_desc->mss = cpu_to_le16(mss);
1232                 context_desc->hdr_len = hdr_len;
1233                 context_desc->status = 0;
1234                 context_desc->cmd_type_len = cpu_to_le32(
1235                                                   IXGB_CONTEXT_DESC_TYPE
1236                                                 | IXGB_CONTEXT_DESC_CMD_TSE
1237                                                 | IXGB_CONTEXT_DESC_CMD_IP
1238                                                 | IXGB_CONTEXT_DESC_CMD_TCP
1239                                                 | IXGB_CONTEXT_DESC_CMD_IDE
1240                                                 | (skb->len - (hdr_len)));
1241
1242
1243                 if(++i == adapter->tx_ring.count) i = 0;
1244                 adapter->tx_ring.next_to_use = i;
1245
1246                 return 1;
1247         }
1248
1249         return 0;
1250 }
1251
1252 static boolean_t
1253 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1254 {
1255         struct ixgb_context_desc *context_desc;
1256         unsigned int i;
1257         uint8_t css, cso;
1258
1259         if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1260                 struct ixgb_buffer *buffer_info;
1261                 css = skb_transport_offset(skb);
1262                 cso = css + skb->csum_offset;
1263
1264                 i = adapter->tx_ring.next_to_use;
1265                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1266                 buffer_info = &adapter->tx_ring.buffer_info[i];
1267                 WARN_ON(buffer_info->dma != 0);
1268
1269                 context_desc->tucss = css;
1270                 context_desc->tucso = cso;
1271                 context_desc->tucse = 0;
1272                 /* zero out any previously existing data in one instruction */
1273                 *(uint32_t *)&(context_desc->ipcss) = 0;
1274                 context_desc->status = 0;
1275                 context_desc->hdr_len = 0;
1276                 context_desc->mss = 0;
1277                 context_desc->cmd_type_len =
1278                         cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1279                                     | IXGB_TX_DESC_CMD_IDE);
1280
1281                 if(++i == adapter->tx_ring.count) i = 0;
1282                 adapter->tx_ring.next_to_use = i;
1283
1284                 return TRUE;
1285         }
1286
1287         return FALSE;
1288 }
1289
1290 #define IXGB_MAX_TXD_PWR        14
1291 #define IXGB_MAX_DATA_PER_TXD   (1<<IXGB_MAX_TXD_PWR)
1292
1293 static int
1294 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1295             unsigned int first)
1296 {
1297         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1298         struct ixgb_buffer *buffer_info;
1299         int len = skb->len;
1300         unsigned int offset = 0, size, count = 0, i;
1301         unsigned int mss = skb_shinfo(skb)->gso_size;
1302
1303         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1304         unsigned int f;
1305
1306         len -= skb->data_len;
1307
1308         i = tx_ring->next_to_use;
1309
1310         while(len) {
1311                 buffer_info = &tx_ring->buffer_info[i];
1312                 size = min(len, IXGB_MAX_DATA_PER_TXD);
1313                 /* Workaround for premature desc write-backs
1314                  * in TSO mode.  Append 4-byte sentinel desc */
1315                 if (unlikely(mss && !nr_frags && size == len && size > 8))
1316                         size -= 4;
1317
1318                 buffer_info->length = size;
1319                 WARN_ON(buffer_info->dma != 0);
1320                 buffer_info->dma =
1321                         pci_map_single(adapter->pdev,
1322                                 skb->data + offset,
1323                                 size,
1324                                 PCI_DMA_TODEVICE);
1325                 buffer_info->time_stamp = jiffies;
1326                 buffer_info->next_to_watch = 0;
1327
1328                 len -= size;
1329                 offset += size;
1330                 count++;
1331                 if(++i == tx_ring->count) i = 0;
1332         }
1333
1334         for(f = 0; f < nr_frags; f++) {
1335                 struct skb_frag_struct *frag;
1336
1337                 frag = &skb_shinfo(skb)->frags[f];
1338                 len = frag->size;
1339                 offset = 0;
1340
1341                 while(len) {
1342                         buffer_info = &tx_ring->buffer_info[i];
1343                         size = min(len, IXGB_MAX_DATA_PER_TXD);
1344
1345                         /* Workaround for premature desc write-backs
1346                          * in TSO mode.  Append 4-byte sentinel desc */
1347                         if (unlikely(mss && (f == (nr_frags - 1))
1348                                      && size == len && size > 8))
1349                                 size -= 4;
1350
1351                         buffer_info->length = size;
1352                         buffer_info->dma =
1353                                 pci_map_page(adapter->pdev,
1354                                         frag->page,
1355                                         frag->page_offset + offset,
1356                                         size,
1357                                         PCI_DMA_TODEVICE);
1358                         buffer_info->time_stamp = jiffies;
1359                         buffer_info->next_to_watch = 0;
1360
1361                         len -= size;
1362                         offset += size;
1363                         count++;
1364                         if(++i == tx_ring->count) i = 0;
1365                 }
1366         }
1367         i = (i == 0) ? tx_ring->count - 1 : i - 1;
1368         tx_ring->buffer_info[i].skb = skb;
1369         tx_ring->buffer_info[first].next_to_watch = i;
1370
1371         return count;
1372 }
1373
1374 static void
1375 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1376 {
1377         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1378         struct ixgb_tx_desc *tx_desc = NULL;
1379         struct ixgb_buffer *buffer_info;
1380         uint32_t cmd_type_len = adapter->tx_cmd_type;
1381         uint8_t status = 0;
1382         uint8_t popts = 0;
1383         unsigned int i;
1384
1385         if(tx_flags & IXGB_TX_FLAGS_TSO) {
1386                 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1387                 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1388         }
1389
1390         if(tx_flags & IXGB_TX_FLAGS_CSUM)
1391                 popts |= IXGB_TX_DESC_POPTS_TXSM;
1392
1393         if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1394                 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1395         }
1396
1397         i = tx_ring->next_to_use;
1398
1399         while(count--) {
1400                 buffer_info = &tx_ring->buffer_info[i];
1401                 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1402                 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1403                 tx_desc->cmd_type_len =
1404                         cpu_to_le32(cmd_type_len | buffer_info->length);
1405                 tx_desc->status = status;
1406                 tx_desc->popts = popts;
1407                 tx_desc->vlan = cpu_to_le16(vlan_id);
1408
1409                 if(++i == tx_ring->count) i = 0;
1410         }
1411
1412         tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1413                                 | IXGB_TX_DESC_CMD_RS );
1414
1415         /* Force memory writes to complete before letting h/w
1416          * know there are new descriptors to fetch.  (Only
1417          * applicable for weak-ordered memory model archs,
1418          * such as IA-64). */
1419         wmb();
1420
1421         tx_ring->next_to_use = i;
1422         IXGB_WRITE_REG(&adapter->hw, TDT, i);
1423 }
1424
1425 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1426 {
1427         struct ixgb_adapter *adapter = netdev_priv(netdev);
1428         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1429
1430         netif_stop_queue(netdev);
1431         /* Herbert's original patch had:
1432          *  smp_mb__after_netif_stop_queue();
1433          * but since that doesn't exist yet, just open code it. */
1434         smp_mb();
1435
1436         /* We need to check again in a case another CPU has just
1437          * made room available. */
1438         if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1439                 return -EBUSY;
1440
1441         /* A reprieve! */
1442         netif_start_queue(netdev);
1443         ++adapter->restart_queue;
1444         return 0;
1445 }
1446
1447 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1448                               struct ixgb_desc_ring *tx_ring, int size)
1449 {
1450         if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1451                 return 0;
1452         return __ixgb_maybe_stop_tx(netdev, size);
1453 }
1454
1455
1456 /* Tx Descriptors needed, worst case */
1457 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1458                          (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1459 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1460         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1461         + 1 /* one more needed for sentinel TSO workaround */
1462
1463 static int
1464 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1465 {
1466         struct ixgb_adapter *adapter = netdev_priv(netdev);
1467         unsigned int first;
1468         unsigned int tx_flags = 0;
1469         unsigned long flags;
1470         int vlan_id = 0;
1471         int tso;
1472
1473         if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1474                 dev_kfree_skb(skb);
1475                 return NETDEV_TX_OK;
1476         }
1477
1478         if(skb->len <= 0) {
1479                 dev_kfree_skb_any(skb);
1480                 return 0;
1481         }
1482
1483 #ifdef NETIF_F_LLTX
1484         if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) {
1485                 /* Collision - tell upper layer to requeue */
1486                 local_irq_restore(flags);
1487                 return NETDEV_TX_LOCKED;
1488         }
1489 #else
1490         spin_lock_irqsave(&adapter->tx_lock, flags);
1491 #endif
1492
1493         if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1494                      DESC_NEEDED))) {
1495                 netif_stop_queue(netdev);
1496                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1497                 return NETDEV_TX_BUSY;
1498         }
1499
1500 #ifndef NETIF_F_LLTX
1501         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1502 #endif
1503
1504         if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1505                 tx_flags |= IXGB_TX_FLAGS_VLAN;
1506                 vlan_id = vlan_tx_tag_get(skb);
1507         }
1508
1509         first = adapter->tx_ring.next_to_use;
1510
1511         tso = ixgb_tso(adapter, skb);
1512         if (tso < 0) {
1513                 dev_kfree_skb_any(skb);
1514 #ifdef NETIF_F_LLTX
1515                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1516 #endif
1517                 return NETDEV_TX_OK;
1518         }
1519
1520         if (likely(tso))
1521                 tx_flags |= IXGB_TX_FLAGS_TSO;
1522         else if(ixgb_tx_csum(adapter, skb))
1523                 tx_flags |= IXGB_TX_FLAGS_CSUM;
1524
1525         ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1526                         tx_flags);
1527
1528         netdev->trans_start = jiffies;
1529
1530 #ifdef NETIF_F_LLTX
1531         /* Make sure there is space in the ring for the next send. */
1532         ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1533
1534         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1535
1536 #endif
1537         return NETDEV_TX_OK;
1538 }
1539
1540 /**
1541  * ixgb_tx_timeout - Respond to a Tx Hang
1542  * @netdev: network interface device structure
1543  **/
1544
1545 static void
1546 ixgb_tx_timeout(struct net_device *netdev)
1547 {
1548         struct ixgb_adapter *adapter = netdev_priv(netdev);
1549
1550         /* Do the reset outside of interrupt context */
1551         schedule_work(&adapter->tx_timeout_task);
1552 }
1553
1554 static void
1555 ixgb_tx_timeout_task(struct work_struct *work)
1556 {
1557         struct ixgb_adapter *adapter =
1558                 container_of(work, struct ixgb_adapter, tx_timeout_task);
1559
1560         adapter->tx_timeout_count++;
1561         ixgb_down(adapter, TRUE);
1562         ixgb_up(adapter);
1563 }
1564
1565 /**
1566  * ixgb_get_stats - Get System Network Statistics
1567  * @netdev: network interface device structure
1568  *
1569  * Returns the address of the device statistics structure.
1570  * The statistics are actually updated from the timer callback.
1571  **/
1572
1573 static struct net_device_stats *
1574 ixgb_get_stats(struct net_device *netdev)
1575 {
1576         struct ixgb_adapter *adapter = netdev_priv(netdev);
1577
1578         return &adapter->net_stats;
1579 }
1580
1581 /**
1582  * ixgb_change_mtu - Change the Maximum Transfer Unit
1583  * @netdev: network interface device structure
1584  * @new_mtu: new value for maximum frame size
1585  *
1586  * Returns 0 on success, negative on failure
1587  **/
1588
1589 static int
1590 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1591 {
1592         struct ixgb_adapter *adapter = netdev_priv(netdev);
1593         int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1594         int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1595
1596
1597         if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1598            || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1599                 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1600                 return -EINVAL;
1601         }
1602
1603         adapter->rx_buffer_len = max_frame;
1604
1605         netdev->mtu = new_mtu;
1606
1607         if ((old_max_frame != max_frame) && netif_running(netdev)) {
1608                 ixgb_down(adapter, TRUE);
1609                 ixgb_up(adapter);
1610         }
1611
1612         return 0;
1613 }
1614
1615 /**
1616  * ixgb_update_stats - Update the board statistics counters.
1617  * @adapter: board private structure
1618  **/
1619
1620 void
1621 ixgb_update_stats(struct ixgb_adapter *adapter)
1622 {
1623         struct net_device *netdev = adapter->netdev;
1624         struct pci_dev *pdev = adapter->pdev;
1625
1626         /* Prevent stats update while adapter is being reset */
1627         if (pci_channel_offline(pdev))
1628                 return;
1629
1630         if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1631            (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1632                 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1633                 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1634                 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1635                 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1636
1637                 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1638                 /* fix up multicast stats by removing broadcasts */
1639                 if(multi >= bcast)
1640                         multi -= bcast;
1641
1642                 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1643                 adapter->stats.mprch += (multi >> 32);
1644                 adapter->stats.bprcl += bcast_l;
1645                 adapter->stats.bprch += bcast_h;
1646         } else {
1647                 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1648                 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1649                 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1650                 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1651         }
1652         adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1653         adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1654         adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1655         adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1656         adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1657         adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1658         adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1659         adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1660         adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1661         adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1662         adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1663         adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1664         adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1665         adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1666         adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1667         adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1668         adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1669         adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1670         adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1671         adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1672         adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1673         adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1674         adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1675         adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1676         adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1677         adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1678         adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1679         adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1680         adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1681         adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1682         adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1683         adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1684         adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1685         adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1686         adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1687         adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1688         adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1689         adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1690         adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1691         adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1692         adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1693         adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1694         adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1695         adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1696         adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1697         adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1698         adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1699         adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1700         adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1701         adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1702         adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1703         adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1704         adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1705         adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1706         adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1707         adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1708
1709         /* Fill out the OS statistics structure */
1710
1711         adapter->net_stats.rx_packets = adapter->stats.gprcl;
1712         adapter->net_stats.tx_packets = adapter->stats.gptcl;
1713         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1714         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1715         adapter->net_stats.multicast = adapter->stats.mprcl;
1716         adapter->net_stats.collisions = 0;
1717
1718         /* ignore RLEC as it reports errors for padded (<64bytes) frames
1719          * with a length in the type/len field */
1720         adapter->net_stats.rx_errors =
1721             /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1722             adapter->stats.ruc +
1723             adapter->stats.roc /*+ adapter->stats.rlec */  +
1724             adapter->stats.icbc +
1725             adapter->stats.ecbc + adapter->stats.mpc;
1726
1727         /* see above
1728          * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1729          */
1730
1731         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1732         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1733         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1734         adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1735
1736         adapter->net_stats.tx_errors = 0;
1737         adapter->net_stats.rx_frame_errors = 0;
1738         adapter->net_stats.tx_aborted_errors = 0;
1739         adapter->net_stats.tx_carrier_errors = 0;
1740         adapter->net_stats.tx_fifo_errors = 0;
1741         adapter->net_stats.tx_heartbeat_errors = 0;
1742         adapter->net_stats.tx_window_errors = 0;
1743 }
1744
1745 #define IXGB_MAX_INTR 10
1746 /**
1747  * ixgb_intr - Interrupt Handler
1748  * @irq: interrupt number
1749  * @data: pointer to a network interface device structure
1750  **/
1751
1752 static irqreturn_t
1753 ixgb_intr(int irq, void *data)
1754 {
1755         struct net_device *netdev = data;
1756         struct ixgb_adapter *adapter = netdev_priv(netdev);
1757         struct ixgb_hw *hw = &adapter->hw;
1758         uint32_t icr = IXGB_READ_REG(hw, ICR);
1759 #ifndef CONFIG_IXGB_NAPI
1760         unsigned int i;
1761 #endif
1762
1763         if(unlikely(!icr))
1764                 return IRQ_NONE;  /* Not our interrupt */
1765
1766         if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1767                 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1768                         mod_timer(&adapter->watchdog_timer, jiffies);
1769
1770 #ifdef CONFIG_IXGB_NAPI
1771         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1772
1773                 /* Disable interrupts and register for poll. The flush
1774                   of the posted write is intentionally left out.
1775                 */
1776
1777                 atomic_inc(&adapter->irq_sem);
1778                 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1779                 __netif_rx_schedule(netdev, &adapter->napi);
1780         }
1781 #else
1782         /* yes, that is actually a & and it is meant to make sure that
1783          * every pass through this for loop checks both receive and
1784          * transmit queues for completed descriptors, intended to
1785          * avoid starvation issues and assist tx/rx fairness. */
1786         for(i = 0; i < IXGB_MAX_INTR; i++)
1787                 if(!ixgb_clean_rx_irq(adapter) &
1788                    !ixgb_clean_tx_irq(adapter))
1789                         break;
1790 #endif
1791         return IRQ_HANDLED;
1792 }
1793
1794 #ifdef CONFIG_IXGB_NAPI
1795 /**
1796  * ixgb_clean - NAPI Rx polling callback
1797  * @adapter: board private structure
1798  **/
1799
1800 static int
1801 ixgb_clean(struct napi_struct *napi, int budget)
1802 {
1803         struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1804         struct net_device *netdev = adapter->netdev;
1805         int work_done = 0;
1806
1807         ixgb_clean_tx_irq(adapter);
1808         ixgb_clean_rx_irq(adapter, &work_done, budget);
1809
1810         /* If budget not fully consumed, exit the polling mode */
1811         if (work_done < budget) {
1812                 netif_rx_complete(netdev, napi);
1813                 ixgb_irq_enable(adapter);
1814         }
1815
1816         return work_done;
1817 }
1818 #endif
1819
1820 /**
1821  * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1822  * @adapter: board private structure
1823  **/
1824
1825 static boolean_t
1826 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1827 {
1828         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1829         struct net_device *netdev = adapter->netdev;
1830         struct ixgb_tx_desc *tx_desc, *eop_desc;
1831         struct ixgb_buffer *buffer_info;
1832         unsigned int i, eop;
1833         boolean_t cleaned = FALSE;
1834
1835         i = tx_ring->next_to_clean;
1836         eop = tx_ring->buffer_info[i].next_to_watch;
1837         eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1838
1839         while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1840
1841                 for(cleaned = FALSE; !cleaned; ) {
1842                         tx_desc = IXGB_TX_DESC(*tx_ring, i);
1843                         buffer_info = &tx_ring->buffer_info[i];
1844
1845                         if (tx_desc->popts
1846                             & (IXGB_TX_DESC_POPTS_TXSM |
1847                                IXGB_TX_DESC_POPTS_IXSM))
1848                                 adapter->hw_csum_tx_good++;
1849
1850                         ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1851
1852                         *(uint32_t *)&(tx_desc->status) = 0;
1853
1854                         cleaned = (i == eop);
1855                         if(++i == tx_ring->count) i = 0;
1856                 }
1857
1858                 eop = tx_ring->buffer_info[i].next_to_watch;
1859                 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1860         }
1861
1862         tx_ring->next_to_clean = i;
1863
1864         if (unlikely(netif_queue_stopped(netdev))) {
1865                 spin_lock(&adapter->tx_lock);
1866                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1867                     (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
1868                         netif_wake_queue(netdev);
1869                 spin_unlock(&adapter->tx_lock);
1870         }
1871
1872         if(adapter->detect_tx_hung) {
1873                 /* detect a transmit hang in hardware, this serializes the
1874                  * check with the clearing of time_stamp and movement of i */
1875                 adapter->detect_tx_hung = FALSE;
1876                 if (tx_ring->buffer_info[eop].dma &&
1877                    time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1878                    && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1879                         IXGB_STATUS_TXOFF)) {
1880                         /* detected Tx unit hang */
1881                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1882                                         "  TDH                  <%x>\n"
1883                                         "  TDT                  <%x>\n"
1884                                         "  next_to_use          <%x>\n"
1885                                         "  next_to_clean        <%x>\n"
1886                                         "buffer_info[next_to_clean]\n"
1887                                         "  time_stamp           <%lx>\n"
1888                                         "  next_to_watch        <%x>\n"
1889                                         "  jiffies              <%lx>\n"
1890                                         "  next_to_watch.status <%x>\n",
1891                                 IXGB_READ_REG(&adapter->hw, TDH),
1892                                 IXGB_READ_REG(&adapter->hw, TDT),
1893                                 tx_ring->next_to_use,
1894                                 tx_ring->next_to_clean,
1895                                 tx_ring->buffer_info[eop].time_stamp,
1896                                 eop,
1897                                 jiffies,
1898                                 eop_desc->status);
1899                         netif_stop_queue(netdev);
1900                 }
1901         }
1902
1903         return cleaned;
1904 }
1905
1906 /**
1907  * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1908  * @adapter: board private structure
1909  * @rx_desc: receive descriptor
1910  * @sk_buff: socket buffer with received data
1911  **/
1912
1913 static void
1914 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1915                  struct ixgb_rx_desc *rx_desc,
1916                  struct sk_buff *skb)
1917 {
1918         /* Ignore Checksum bit is set OR
1919          * TCP Checksum has not been calculated
1920          */
1921         if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1922            (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1923                 skb->ip_summed = CHECKSUM_NONE;
1924                 return;
1925         }
1926
1927         /* At this point we know the hardware did the TCP checksum */
1928         /* now look at the TCP checksum error bit */
1929         if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1930                 /* let the stack verify checksum errors */
1931                 skb->ip_summed = CHECKSUM_NONE;
1932                 adapter->hw_csum_rx_error++;
1933         } else {
1934                 /* TCP checksum is good */
1935                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1936                 adapter->hw_csum_rx_good++;
1937         }
1938 }
1939
1940 /**
1941  * ixgb_clean_rx_irq - Send received data up the network stack,
1942  * @adapter: board private structure
1943  **/
1944
1945 static boolean_t
1946 #ifdef CONFIG_IXGB_NAPI
1947 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1948 #else
1949 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1950 #endif
1951 {
1952         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1953         struct net_device *netdev = adapter->netdev;
1954         struct pci_dev *pdev = adapter->pdev;
1955         struct ixgb_rx_desc *rx_desc, *next_rxd;
1956         struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1957         uint32_t length;
1958         unsigned int i, j;
1959         boolean_t cleaned = FALSE;
1960
1961         i = rx_ring->next_to_clean;
1962         rx_desc = IXGB_RX_DESC(*rx_ring, i);
1963         buffer_info = &rx_ring->buffer_info[i];
1964
1965         while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1966                 struct sk_buff *skb, *next_skb;
1967                 u8 status;
1968
1969 #ifdef CONFIG_IXGB_NAPI
1970                 if(*work_done >= work_to_do)
1971                         break;
1972
1973                 (*work_done)++;
1974 #endif
1975                 status = rx_desc->status;
1976                 skb = buffer_info->skb;
1977                 buffer_info->skb = NULL;
1978
1979                 prefetch(skb->data);
1980
1981                 if(++i == rx_ring->count) i = 0;
1982                 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1983                 prefetch(next_rxd);
1984
1985                 if((j = i + 1) == rx_ring->count) j = 0;
1986                 next2_buffer = &rx_ring->buffer_info[j];
1987                 prefetch(next2_buffer);
1988
1989                 next_buffer = &rx_ring->buffer_info[i];
1990                 next_skb = next_buffer->skb;
1991                 prefetch(next_skb);
1992
1993                 cleaned = TRUE;
1994
1995                 pci_unmap_single(pdev,
1996                                  buffer_info->dma,
1997                                  buffer_info->length,
1998                                  PCI_DMA_FROMDEVICE);
1999
2000                 length = le16_to_cpu(rx_desc->length);
2001
2002                 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
2003
2004                         /* All receives must fit into a single buffer */
2005
2006                         IXGB_DBG("Receive packet consumed multiple buffers "
2007                                          "length<%x>\n", length);
2008
2009                         dev_kfree_skb_irq(skb);
2010                         goto rxdesc_done;
2011                 }
2012
2013                 if (unlikely(rx_desc->errors
2014                              & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
2015                                 | IXGB_RX_DESC_ERRORS_P |
2016                                 IXGB_RX_DESC_ERRORS_RXE))) {
2017
2018                         dev_kfree_skb_irq(skb);
2019                         goto rxdesc_done;
2020                 }
2021
2022                 /* code added for copybreak, this should improve
2023                  * performance for small packets with large amounts
2024                  * of reassembly being done in the stack */
2025 #define IXGB_CB_LENGTH 256
2026                 if (length < IXGB_CB_LENGTH) {
2027                         struct sk_buff *new_skb =
2028                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
2029                         if (new_skb) {
2030                                 skb_reserve(new_skb, NET_IP_ALIGN);
2031                                 skb_copy_to_linear_data_offset(new_skb,
2032                                                                -NET_IP_ALIGN,
2033                                                                (skb->data -
2034                                                                 NET_IP_ALIGN),
2035                                                                (length +
2036                                                                 NET_IP_ALIGN));
2037                                 /* save the skb in buffer_info as good */
2038                                 buffer_info->skb = skb;
2039                                 skb = new_skb;
2040                         }
2041                 }
2042                 /* end copybreak code */
2043
2044                 /* Good Receive */
2045                 skb_put(skb, length);
2046
2047                 /* Receive Checksum Offload */
2048                 ixgb_rx_checksum(adapter, rx_desc, skb);
2049
2050                 skb->protocol = eth_type_trans(skb, netdev);
2051 #ifdef CONFIG_IXGB_NAPI
2052                 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2053                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2054                                 le16_to_cpu(rx_desc->special) &
2055                                         IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2056                 } else {
2057                         netif_receive_skb(skb);
2058                 }
2059 #else /* CONFIG_IXGB_NAPI */
2060                 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2061                         vlan_hwaccel_rx(skb, adapter->vlgrp,
2062                                 le16_to_cpu(rx_desc->special) &
2063                                         IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2064                 } else {
2065                         netif_rx(skb);
2066                 }
2067 #endif /* CONFIG_IXGB_NAPI */
2068                 netdev->last_rx = jiffies;
2069
2070 rxdesc_done:
2071                 /* clean up descriptor, might be written over by hw */
2072                 rx_desc->status = 0;
2073
2074                 /* use prefetched values */
2075                 rx_desc = next_rxd;
2076                 buffer_info = next_buffer;
2077         }
2078
2079         rx_ring->next_to_clean = i;
2080
2081         ixgb_alloc_rx_buffers(adapter);
2082
2083         return cleaned;
2084 }
2085
2086 /**
2087  * ixgb_alloc_rx_buffers - Replace used receive buffers
2088  * @adapter: address of board private structure
2089  **/
2090
2091 static void
2092 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2093 {
2094         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2095         struct net_device *netdev = adapter->netdev;
2096         struct pci_dev *pdev = adapter->pdev;
2097         struct ixgb_rx_desc *rx_desc;
2098         struct ixgb_buffer *buffer_info;
2099         struct sk_buff *skb;
2100         unsigned int i;
2101         int num_group_tail_writes;
2102         long cleancount;
2103
2104         i = rx_ring->next_to_use;
2105         buffer_info = &rx_ring->buffer_info[i];
2106         cleancount = IXGB_DESC_UNUSED(rx_ring);
2107
2108         num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2109
2110         /* leave three descriptors unused */
2111         while(--cleancount > 2) {
2112                 /* recycle! its good for you */
2113                 skb = buffer_info->skb;
2114                 if (skb) {
2115                         skb_trim(skb, 0);
2116                         goto map_skb;
2117                 }
2118
2119                 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2120                                        + NET_IP_ALIGN);
2121                 if (unlikely(!skb)) {
2122                         /* Better luck next round */
2123                         adapter->alloc_rx_buff_failed++;
2124                         break;
2125                 }
2126
2127                 /* Make buffer alignment 2 beyond a 16 byte boundary
2128                  * this will result in a 16 byte aligned IP header after
2129                  * the 14 byte MAC header is removed
2130                  */
2131                 skb_reserve(skb, NET_IP_ALIGN);
2132
2133                 buffer_info->skb = skb;
2134                 buffer_info->length = adapter->rx_buffer_len;
2135 map_skb:
2136                 buffer_info->dma = pci_map_single(pdev,
2137                                                   skb->data,
2138                                                   adapter->rx_buffer_len,
2139                                                   PCI_DMA_FROMDEVICE);
2140
2141                 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2142                 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2143                 /* guarantee DD bit not set now before h/w gets descriptor
2144                  * this is the rest of the workaround for h/w double
2145                  * writeback. */
2146                 rx_desc->status = 0;
2147
2148
2149                 if(++i == rx_ring->count) i = 0;
2150                 buffer_info = &rx_ring->buffer_info[i];
2151         }
2152
2153         if (likely(rx_ring->next_to_use != i)) {
2154                 rx_ring->next_to_use = i;
2155                 if (unlikely(i-- == 0))
2156                         i = (rx_ring->count - 1);
2157
2158                 /* Force memory writes to complete before letting h/w
2159                  * know there are new descriptors to fetch.  (Only
2160                  * applicable for weak-ordered memory model archs, such
2161                  * as IA-64). */
2162                 wmb();
2163                 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2164         }
2165 }
2166
2167 /**
2168  * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2169  *
2170  * @param netdev network interface device structure
2171  * @param grp indicates to enable or disable tagging/stripping
2172  **/
2173 static void
2174 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2175 {
2176         struct ixgb_adapter *adapter = netdev_priv(netdev);
2177         uint32_t ctrl, rctl;
2178
2179         ixgb_irq_disable(adapter);
2180         adapter->vlgrp = grp;
2181
2182         if(grp) {
2183                 /* enable VLAN tag insert/strip */
2184                 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2185                 ctrl |= IXGB_CTRL0_VME;
2186                 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2187
2188                 /* enable VLAN receive filtering */
2189
2190                 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2191                 rctl |= IXGB_RCTL_VFE;
2192                 rctl &= ~IXGB_RCTL_CFIEN;
2193                 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2194         } else {
2195                 /* disable VLAN tag insert/strip */
2196
2197                 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2198                 ctrl &= ~IXGB_CTRL0_VME;
2199                 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2200
2201                 /* disable VLAN filtering */
2202
2203                 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2204                 rctl &= ~IXGB_RCTL_VFE;
2205                 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2206         }
2207
2208         /* don't enable interrupts unless we are UP */
2209         if (adapter->netdev->flags & IFF_UP)
2210                 ixgb_irq_enable(adapter);
2211 }
2212
2213 static void
2214 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2215 {
2216         struct ixgb_adapter *adapter = netdev_priv(netdev);
2217         uint32_t vfta, index;
2218
2219         /* add VID to filter table */
2220
2221         index = (vid >> 5) & 0x7F;
2222         vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2223         vfta |= (1 << (vid & 0x1F));
2224         ixgb_write_vfta(&adapter->hw, index, vfta);
2225 }
2226
2227 static void
2228 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2229 {
2230         struct ixgb_adapter *adapter = netdev_priv(netdev);
2231         uint32_t vfta, index;
2232
2233         ixgb_irq_disable(adapter);
2234
2235         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2236
2237         /* don't enable interrupts unless we are UP */
2238         if (adapter->netdev->flags & IFF_UP)
2239                 ixgb_irq_enable(adapter);
2240
2241         /* remove VID from filter table */
2242
2243         index = (vid >> 5) & 0x7F;
2244         vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2245         vfta &= ~(1 << (vid & 0x1F));
2246         ixgb_write_vfta(&adapter->hw, index, vfta);
2247 }
2248
2249 static void
2250 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2251 {
2252         ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2253
2254         if(adapter->vlgrp) {
2255                 uint16_t vid;
2256                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2257                         if(!vlan_group_get_device(adapter->vlgrp, vid))
2258                                 continue;
2259                         ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2260                 }
2261         }
2262 }
2263
2264 #ifdef CONFIG_NET_POLL_CONTROLLER
2265 /*
2266  * Polling 'interrupt' - used by things like netconsole to send skbs
2267  * without having to re-enable interrupts. It's not called while
2268  * the interrupt routine is executing.
2269  */
2270
2271 static void ixgb_netpoll(struct net_device *dev)
2272 {
2273         struct ixgb_adapter *adapter = netdev_priv(dev);
2274
2275         disable_irq(adapter->pdev->irq);
2276         ixgb_intr(adapter->pdev->irq, dev);
2277         enable_irq(adapter->pdev->irq);
2278 }
2279 #endif
2280
2281 /**
2282  * ixgb_io_error_detected() - called when PCI error is detected
2283  * @pdev    pointer to pci device with error
2284  * @state   pci channel state after error
2285  *
2286  * This callback is called by the PCI subsystem whenever
2287  * a PCI bus error is detected.
2288  */
2289 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2290                                      enum pci_channel_state state)
2291 {
2292         struct net_device *netdev = pci_get_drvdata(pdev);
2293         struct ixgb_adapter *adapter = netdev_priv(netdev);
2294
2295         if(netif_running(netdev))
2296                 ixgb_down(adapter, TRUE);
2297
2298         pci_disable_device(pdev);
2299
2300         /* Request a slot reset. */
2301         return PCI_ERS_RESULT_NEED_RESET;
2302 }
2303
2304 /**
2305  * ixgb_io_slot_reset - called after the pci bus has been reset.
2306  * @pdev    pointer to pci device with error
2307  *
2308  * This callback is called after the PCI buss has been reset.
2309  * Basically, this tries to restart the card from scratch.
2310  * This is a shortened version of the device probe/discovery code,
2311  * it resembles the first-half of the ixgb_probe() routine.
2312  */
2313 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2314 {
2315         struct net_device *netdev = pci_get_drvdata(pdev);
2316         struct ixgb_adapter *adapter = netdev_priv(netdev);
2317
2318         if(pci_enable_device(pdev)) {
2319                 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2320                 return PCI_ERS_RESULT_DISCONNECT;
2321         }
2322
2323         /* Perform card reset only on one instance of the card */
2324         if (0 != PCI_FUNC (pdev->devfn))
2325                 return PCI_ERS_RESULT_RECOVERED;
2326
2327         pci_set_master(pdev);
2328
2329         netif_carrier_off(netdev);
2330         netif_stop_queue(netdev);
2331         ixgb_reset(adapter);
2332
2333         /* Make sure the EEPROM is good */
2334         if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2335                 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2336                 return PCI_ERS_RESULT_DISCONNECT;
2337         }
2338         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2339         memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2340
2341         if(!is_valid_ether_addr(netdev->perm_addr)) {
2342                 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2343                 return PCI_ERS_RESULT_DISCONNECT;
2344         }
2345
2346         return PCI_ERS_RESULT_RECOVERED;
2347 }
2348
2349 /**
2350  * ixgb_io_resume - called when its OK to resume normal operations
2351  * @pdev    pointer to pci device with error
2352  *
2353  * The error recovery driver tells us that its OK to resume
2354  * normal operation. Implementation resembles the second-half
2355  * of the ixgb_probe() routine.
2356  */
2357 static void ixgb_io_resume (struct pci_dev *pdev)
2358 {
2359         struct net_device *netdev = pci_get_drvdata(pdev);
2360         struct ixgb_adapter *adapter = netdev_priv(netdev);
2361
2362         pci_set_master(pdev);
2363
2364         if(netif_running(netdev)) {
2365                 if(ixgb_up(adapter)) {
2366                         printk ("ixgb: can't bring device back up after reset\n");
2367                         return;
2368                 }
2369         }
2370
2371         netif_device_attach(netdev);
2372         mod_timer(&adapter->watchdog_timer, jiffies);
2373 }
2374
2375 /* ixgb_main.c */