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   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-k2"DRIVERNAPI
  40 char ixgb_driver_version[] = DRV_VERSION;
  41 static 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 void ixgb_set_ethtool_ops(struct net_device *netdev);
 108 static void ixgb_tx_timeout(struct net_device *dev);
 109 static void ixgb_tx_timeout_task(struct work_struct *work);
 110 static void ixgb_vlan_rx_register(struct net_device *netdev,
 111                                   struct vlan_group *grp);
 112 static void ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 113 static void ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 114 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
 115
 116 #ifdef CONFIG_NET_POLL_CONTROLLER
 117 /* for netdump / net console */
 118 static void ixgb_netpoll(struct net_device *dev);
 119 #endif
 120
 121 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
 122                              enum pci_channel_state state);
 123 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
 124 static void ixgb_io_resume (struct pci_dev *pdev);
 125
 126 /* Exported from other modules */
 127 extern void ixgb_check_options(struct ixgb_adapter *adapter);
 128
 129 static struct pci_error_handlers ixgb_err_handler = {
 130         .error_detected = ixgb_io_error_detected,
 131         .slot_reset = ixgb_io_slot_reset,
 132         .resume = ixgb_io_resume,
 133 };
 134
 135 static struct pci_driver ixgb_driver = {
 136         .name     = ixgb_driver_name,
 137         .id_table = ixgb_pci_tbl,
 138         .probe    = ixgb_probe,
 139         .remove   = __devexit_p(ixgb_remove),
 140         .err_handler = &ixgb_err_handler
 141 };
 142
 143 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 144 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
 145 MODULE_LICENSE("GPL");
 146 MODULE_VERSION(DRV_VERSION);
 147
 148 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 149 static int debug = DEFAULT_DEBUG_LEVEL_SHIFT;
 150 module_param(debug, int, 0);
 151 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 152
 153 /* some defines for controlling descriptor fetches in h/w */
 154 #define RXDCTL_WTHRESH_DEFAULT 15  /* chip writes back at this many or RXT0 */
 155 #define RXDCTL_PTHRESH_DEFAULT 0   /* chip considers prefech below
 156                                     * this */
 157 #define RXDCTL_HTHRESH_DEFAULT 0   /* chip will only prefetch if tail
 158                                     * is pushed this many descriptors
 159                                     * from head */
 160
 161 /**
 162  * ixgb_init_module - Driver Registration Routine
 163  *
 164  * ixgb_init_module is the first routine called when the driver is
 165  * loaded. All it does is register with the PCI subsystem.
 166  **/
 167
 168 static int __init
 169 ixgb_init_module(void)
 170 {
 171         printk(KERN_INFO "%s - version %s\n",
 172                ixgb_driver_string, ixgb_driver_version);
 173
 174         printk(KERN_INFO "%s\n", ixgb_copyright);
 175
 176         return pci_register_driver(&ixgb_driver);
 177 }
 178
 179 module_init(ixgb_init_module);
 180
 181 /**
 182  * ixgb_exit_module - Driver Exit Cleanup Routine
 183  *
 184  * ixgb_exit_module is called just before the driver is removed
 185  * from memory.
 186  **/
 187
 188 static void __exit
 189 ixgb_exit_module(void)
 190 {
 191         pci_unregister_driver(&ixgb_driver);
 192 }
 193
 194 module_exit(ixgb_exit_module);
 195
 196 /**
 197  * ixgb_irq_disable - Mask off interrupt generation on the NIC
 198  * @adapter: board private structure
 199  **/
 200
 201 static void
 202 ixgb_irq_disable(struct ixgb_adapter *adapter)
 203 {
 204         atomic_inc(&adapter->irq_sem);
 205         IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
 206         IXGB_WRITE_FLUSH(&adapter->hw);
 207         synchronize_irq(adapter->pdev->irq);
 208 }
 209
 210 /**
 211  * ixgb_irq_enable - Enable default interrupt generation settings
 212  * @adapter: board private structure
 213  **/
 214
 215 static void
 216 ixgb_irq_enable(struct ixgb_adapter *adapter)
 217 {
 218         if(atomic_dec_and_test(&adapter->irq_sem)) {
 219                 IXGB_WRITE_REG(&adapter->hw, IMS,
 220                                IXGB_INT_RXT0 | IXGB_INT_RXDMT0 | IXGB_INT_TXDW |
 221                                IXGB_INT_LSC);
 222                 IXGB_WRITE_FLUSH(&adapter->hw);
 223         }
 224 }
 225
 226 int
 227 ixgb_up(struct ixgb_adapter *adapter)
 228 {
 229         struct net_device *netdev = adapter->netdev;
 230         int err, irq_flags = IRQF_SHARED;
 231         int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 232         struct ixgb_hw *hw = &adapter->hw;
 233
 234         /* hardware has been reset, we need to reload some things */
 235
 236         ixgb_rar_set(hw, netdev->dev_addr, 0);
 237         ixgb_set_multi(netdev);
 238
 239         ixgb_restore_vlan(adapter);
 240
 241         ixgb_configure_tx(adapter);
 242         ixgb_setup_rctl(adapter);
 243         ixgb_configure_rx(adapter);
 244         ixgb_alloc_rx_buffers(adapter);
 245
 246         /* disable interrupts and get the hardware into a known state */
 247         IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
 248
 249         /* only enable MSI if bus is in PCI-X mode */
 250         if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
 251                 err = pci_enable_msi(adapter->pdev);
 252                 if (!err) {
 253                         adapter->have_msi = 1;
 254                         irq_flags = 0;
 255                 }
 256                 /* proceed to try to request regular interrupt */
 257         }
 258
 259         err = request_irq(adapter->pdev->irq, &ixgb_intr, irq_flags,
 260                           netdev->name, netdev);
 261         if (err) {
 262                 if (adapter->have_msi)
 263                         pci_disable_msi(adapter->pdev);
 264                 DPRINTK(PROBE, ERR,
 265                  "Unable to allocate interrupt Error: %d\n", err);
 266                 return err;
 267         }
 268
 269         if((hw->max_frame_size != max_frame) ||
 270                 (hw->max_frame_size !=
 271                 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
 272
 273                 hw->max_frame_size = max_frame;
 274
 275                 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
 276
 277                 if(hw->max_frame_size >
 278                    IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
 279                         uint32_t ctrl0 = IXGB_READ_REG(hw, CTRL0);
 280
 281                         if(!(ctrl0 & IXGB_CTRL0_JFE)) {
 282                                 ctrl0 |= IXGB_CTRL0_JFE;
 283                                 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
 284                         }
 285                 }
 286         }
 287
 288         mod_timer(&adapter->watchdog_timer, jiffies);
 289
 290 #ifdef CONFIG_IXGB_NAPI
 291         napi_enable(&adapter->napi);
 292 #endif
 293         ixgb_irq_enable(adapter);
 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         ixgb_irq_disable(adapter);
 304         free_irq(adapter->pdev->irq, netdev);
 305
 306         if (adapter->have_msi)
 307                 pci_disable_msi(adapter->pdev);
 308
 309         if(kill_watchdog)
 310                 del_timer_sync(&adapter->watchdog_timer);
 311 #ifdef CONFIG_IXGB_NAPI
 312         napi_disable(&adapter->napi);
 313 #endif
 314         adapter->link_speed = 0;
 315         adapter->link_duplex = 0;
 316         netif_carrier_off(netdev);
 317         netif_stop_queue(netdev);
 318
 319         ixgb_reset(adapter);
 320         ixgb_clean_tx_ring(adapter);
 321         ixgb_clean_rx_ring(adapter);
 322 }
 323
 324 void
 325 ixgb_reset(struct ixgb_adapter *adapter)
 326 {
 327
 328         ixgb_adapter_stop(&adapter->hw);
 329         if(!ixgb_init_hw(&adapter->hw))
 330                 DPRINTK(PROBE, ERR, "ixgb_init_hw failed.\n");
 331 }
 332
 333 /**
 334  * ixgb_probe - Device Initialization Routine
 335  * @pdev: PCI device information struct
 336  * @ent: entry in ixgb_pci_tbl
 337  *
 338  * Returns 0 on success, negative on failure
 339  *
 340  * ixgb_probe initializes an adapter identified by a pci_dev structure.
 341  * The OS initialization, configuring of the adapter private structure,
 342  * and a hardware reset occur.
 343  **/
 344
 345 static int __devinit
 346 ixgb_probe(struct pci_dev *pdev,
 347                 const struct pci_device_id *ent)
 348 {
 349         struct net_device *netdev = NULL;
 350         struct ixgb_adapter *adapter;
 351         static int cards_found = 0;
 352         unsigned long mmio_start;
 353         int mmio_len;
 354         int pci_using_dac;
 355         int i;
 356         int err;
 357
 358         if((err = pci_enable_device(pdev)))
 359                 return err;
 360
 361         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 362            !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 363                 pci_using_dac = 1;
 364         } else {
 365                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
 366                    (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 367                         printk(KERN_ERR
 368                          "ixgb: No usable DMA configuration, aborting\n");
 369                         goto err_dma_mask;
 370                 }
 371                 pci_using_dac = 0;
 372         }
 373
 374         if((err = pci_request_regions(pdev, ixgb_driver_name)))
 375                 goto err_request_regions;
 376
 377         pci_set_master(pdev);
 378
 379         netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
 380         if(!netdev) {
 381                 err = -ENOMEM;
 382                 goto err_alloc_etherdev;
 383         }
 384
 385         SET_NETDEV_DEV(netdev, &pdev->dev);
 386
 387         pci_set_drvdata(pdev, netdev);
 388         adapter = netdev_priv(netdev);
 389         adapter->netdev = netdev;
 390         adapter->pdev = pdev;
 391         adapter->hw.back = adapter;
 392         adapter->msg_enable = netif_msg_init(debug, DEFAULT_DEBUG_LEVEL_SHIFT);
 393
 394         mmio_start = pci_resource_start(pdev, BAR_0);
 395         mmio_len = pci_resource_len(pdev, BAR_0);
 396
 397         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 398         if(!adapter->hw.hw_addr) {
 399                 err = -EIO;
 400                 goto err_ioremap;
 401         }
 402
 403         for(i = BAR_1; i <= BAR_5; i++) {
 404                 if(pci_resource_len(pdev, i) == 0)
 405                         continue;
 406                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 407                         adapter->hw.io_base = pci_resource_start(pdev, i);
 408                         break;
 409                 }
 410         }
 411
 412         netdev->open = &ixgb_open;
 413         netdev->stop = &ixgb_close;
 414         netdev->hard_start_xmit = &ixgb_xmit_frame;
 415         netdev->get_stats = &ixgb_get_stats;
 416         netdev->set_multicast_list = &ixgb_set_multi;
 417         netdev->set_mac_address = &ixgb_set_mac;
 418         netdev->change_mtu = &ixgb_change_mtu;
 419         ixgb_set_ethtool_ops(netdev);
 420         netdev->tx_timeout = &ixgb_tx_timeout;
 421         netdev->watchdog_timeo = 5 * HZ;
 422 #ifdef CONFIG_IXGB_NAPI
 423         netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
 424 #endif
 425         netdev->vlan_rx_register = ixgb_vlan_rx_register;
 426         netdev->vlan_rx_add_vid = ixgb_vlan_rx_add_vid;
 427         netdev->vlan_rx_kill_vid = ixgb_vlan_rx_kill_vid;
 428 #ifdef CONFIG_NET_POLL_CONTROLLER
 429         netdev->poll_controller = ixgb_netpoll;
 430 #endif
 431
 432         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 433         netdev->mem_start = mmio_start;
 434         netdev->mem_end = mmio_start + mmio_len;
 435         netdev->base_addr = adapter->hw.io_base;
 436
 437         adapter->bd_number = cards_found;
 438         adapter->link_speed = 0;
 439         adapter->link_duplex = 0;
 440
 441         /* setup the private structure */
 442
 443         if((err = ixgb_sw_init(adapter)))
 444                 goto err_sw_init;
 445
 446         netdev->features = NETIF_F_SG |
 447                            NETIF_F_HW_CSUM |
 448                            NETIF_F_HW_VLAN_TX |
 449                            NETIF_F_HW_VLAN_RX |
 450                            NETIF_F_HW_VLAN_FILTER;
 451         netdev->features |= NETIF_F_TSO;
 452 #ifdef NETIF_F_LLTX
 453         netdev->features |= NETIF_F_LLTX;
 454 #endif
 455
 456         if(pci_using_dac)
 457                 netdev->features |= NETIF_F_HIGHDMA;
 458
 459         /* make sure the EEPROM is good */
 460
 461         if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
 462                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 463                 err = -EIO;
 464                 goto err_eeprom;
 465         }
 466
 467         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
 468         memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
 469
 470         if(!is_valid_ether_addr(netdev->perm_addr)) {
 471                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 472                 err = -EIO;
 473                 goto err_eeprom;
 474         }
 475
 476         adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
 477
 478         init_timer(&adapter->watchdog_timer);
 479         adapter->watchdog_timer.function = &ixgb_watchdog;
 480         adapter->watchdog_timer.data = (unsigned long)adapter;
 481
 482         INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
 483
 484         strcpy(netdev->name, "eth%d");
 485         if((err = register_netdev(netdev)))
 486                 goto err_register;
 487
 488         /* we're going to reset, so assume we have no link for now */
 489
 490         netif_carrier_off(netdev);
 491         netif_stop_queue(netdev);
 492
 493         DPRINTK(PROBE, INFO, "Intel(R) PRO/10GbE Network Connection\n");
 494         ixgb_check_options(adapter);
 495         /* reset the hardware with the new settings */
 496
 497         ixgb_reset(adapter);
 498
 499         cards_found++;
 500         return 0;
 501
 502 err_register:
 503 err_sw_init:
 504 err_eeprom:
 505         iounmap(adapter->hw.hw_addr);
 506 err_ioremap:
 507         free_netdev(netdev);
 508 err_alloc_etherdev:
 509         pci_release_regions(pdev);
 510 err_request_regions:
 511 err_dma_mask:
 512         pci_disable_device(pdev);
 513         return err;
 514 }
 515
 516 /**
 517  * ixgb_remove - Device Removal Routine
 518  * @pdev: PCI device information struct
 519  *
 520  * ixgb_remove is called by the PCI subsystem to alert the driver
 521  * that it should release a PCI device.  The could be caused by a
 522  * Hot-Plug event, or because the driver is going to be removed from
 523  * memory.
 524  **/
 525
 526 static void __devexit
 527 ixgb_remove(struct pci_dev *pdev)
 528 {
 529         struct net_device *netdev = pci_get_drvdata(pdev);
 530         struct ixgb_adapter *adapter = netdev_priv(netdev);
 531
 532         unregister_netdev(netdev);
 533
 534         iounmap(adapter->hw.hw_addr);
 535         pci_release_regions(pdev);
 536
 537         free_netdev(netdev);
 538 }
 539
 540 /**
 541  * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
 542  * @adapter: board private structure to initialize
 543  *
 544  * ixgb_sw_init initializes the Adapter private data structure.
 545  * Fields are initialized based on PCI device information and
 546  * OS network device settings (MTU size).
 547  **/
 548
 549 static int __devinit
 550 ixgb_sw_init(struct ixgb_adapter *adapter)
 551 {
 552         struct ixgb_hw *hw = &adapter->hw;
 553         struct net_device *netdev = adapter->netdev;
 554         struct pci_dev *pdev = adapter->pdev;
 555
 556         /* PCI config space info */
 557
 558         hw->vendor_id = pdev->vendor;
 559         hw->device_id = pdev->device;
 560         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 561         hw->subsystem_id = pdev->subsystem_device;
 562
 563         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 564         adapter->rx_buffer_len = hw->max_frame_size;
 565
 566         if((hw->device_id == IXGB_DEVICE_ID_82597EX)
 567            || (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4)
 568            || (hw->device_id == IXGB_DEVICE_ID_82597EX_LR)
 569            || (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
 570                         hw->mac_type = ixgb_82597;
 571         else {
 572                 /* should never have loaded on this device */
 573                 DPRINTK(PROBE, ERR, "unsupported device id\n");
 574         }
 575
 576         /* enable flow control to be programmed */
 577         hw->fc.send_xon = 1;
 578
 579         atomic_set(&adapter->irq_sem, 1);
 580         spin_lock_init(&adapter->tx_lock);
 581
 582         return 0;
 583 }
 584
 585 /**
 586  * ixgb_open - Called when a network interface is made active
 587  * @netdev: network interface device structure
 588  *
 589  * Returns 0 on success, negative value on failure
 590  *
 591  * The open entry point is called when a network interface is made
 592  * active by the system (IFF_UP).  At this point all resources needed
 593  * for transmit and receive operations are allocated, the interrupt
 594  * handler is registered with the OS, the watchdog timer is started,
 595  * and the stack is notified that the interface is ready.
 596  **/
 597
 598 static int
 599 ixgb_open(struct net_device *netdev)
 600 {
 601         struct ixgb_adapter *adapter = netdev_priv(netdev);
 602         int err;
 603
 604         /* allocate transmit descriptors */
 605
 606         if((err = ixgb_setup_tx_resources(adapter)))
 607                 goto err_setup_tx;
 608
 609         /* allocate receive descriptors */
 610
 611         if((err = ixgb_setup_rx_resources(adapter)))
 612                 goto err_setup_rx;
 613
 614         if((err = ixgb_up(adapter)))
 615                 goto err_up;
 616
 617         return 0;
 618
 619 err_up:
 620         ixgb_free_rx_resources(adapter);
 621 err_setup_rx:
 622         ixgb_free_tx_resources(adapter);
 623 err_setup_tx:
 624         ixgb_reset(adapter);
 625
 626         return err;
 627 }
 628
 629 /**
 630  * ixgb_close - Disables a network interface
 631  * @netdev: network interface device structure
 632  *
 633  * Returns 0, this is not allowed to fail
 634  *
 635  * The close entry point is called when an interface is de-activated
 636  * by the OS.  The hardware is still under the drivers control, but
 637  * needs to be disabled.  A global MAC reset is issued to stop the
 638  * hardware, and all transmit and receive resources are freed.
 639  **/
 640
 641 static int
 642 ixgb_close(struct net_device *netdev)
 643 {
 644         struct ixgb_adapter *adapter = netdev_priv(netdev);
 645
 646         ixgb_down(adapter, TRUE);
 647
 648         ixgb_free_tx_resources(adapter);
 649         ixgb_free_rx_resources(adapter);
 650
 651         return 0;
 652 }
 653
 654 /**
 655  * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
 656  * @adapter: board private structure
 657  *
 658  * Return 0 on success, negative on failure
 659  **/
 660
 661 int
 662 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
 663 {
 664         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
 665         struct pci_dev *pdev = adapter->pdev;
 666         int size;
 667
 668         size = sizeof(struct ixgb_buffer) * txdr->count;
 669         txdr->buffer_info = vmalloc(size);
 670         if(!txdr->buffer_info) {
 671                 DPRINTK(PROBE, ERR,
 672                  "Unable to allocate transmit descriptor ring memory\n");
 673                 return -ENOMEM;
 674         }
 675         memset(txdr->buffer_info, 0, size);
 676
 677         /* round up to nearest 4K */
 678
 679         txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
 680         txdr->size = ALIGN(txdr->size, 4096);
 681
 682         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 683         if(!txdr->desc) {
 684                 vfree(txdr->buffer_info);
 685                 DPRINTK(PROBE, ERR,
 686                  "Unable to allocate transmit descriptor memory\n");
 687                 return -ENOMEM;
 688         }
 689         memset(txdr->desc, 0, txdr->size);
 690
 691         txdr->next_to_use = 0;
 692         txdr->next_to_clean = 0;
 693
 694         return 0;
 695 }
 696
 697 /**
 698  * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
 699  * @adapter: board private structure
 700  *
 701  * Configure the Tx unit of the MAC after a reset.
 702  **/
 703
 704 static void
 705 ixgb_configure_tx(struct ixgb_adapter *adapter)
 706 {
 707         uint64_t tdba = adapter->tx_ring.dma;
 708         uint32_t tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
 709         uint32_t tctl;
 710         struct ixgb_hw *hw = &adapter->hw;
 711
 712         /* Setup the Base and Length of the Tx Descriptor Ring
 713          * tx_ring.dma can be either a 32 or 64 bit value
 714          */
 715
 716         IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
 717         IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
 718
 719         IXGB_WRITE_REG(hw, TDLEN, tdlen);
 720
 721         /* Setup the HW Tx Head and Tail descriptor pointers */
 722
 723         IXGB_WRITE_REG(hw, TDH, 0);
 724         IXGB_WRITE_REG(hw, TDT, 0);
 725
 726         /* don't set up txdctl, it induces performance problems if configured
 727          * incorrectly */
 728         /* Set the Tx Interrupt Delay register */
 729
 730         IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
 731
 732         /* Program the Transmit Control Register */
 733
 734         tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
 735         IXGB_WRITE_REG(hw, TCTL, tctl);
 736
 737         /* Setup Transmit Descriptor Settings for this adapter */
 738         adapter->tx_cmd_type =
 739                 IXGB_TX_DESC_TYPE
 740                 | (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
 741 }
 742
 743 /**
 744  * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
 745  * @adapter: board private structure
 746  *
 747  * Returns 0 on success, negative on failure
 748  **/
 749
 750 int
 751 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
 752 {
 753         struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
 754         struct pci_dev *pdev = adapter->pdev;
 755         int size;
 756
 757         size = sizeof(struct ixgb_buffer) * rxdr->count;
 758         rxdr->buffer_info = vmalloc(size);
 759         if(!rxdr->buffer_info) {
 760                 DPRINTK(PROBE, ERR,
 761                  "Unable to allocate receive descriptor ring\n");
 762                 return -ENOMEM;
 763         }
 764         memset(rxdr->buffer_info, 0, size);
 765
 766         /* Round up to nearest 4K */
 767
 768         rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
 769         rxdr->size = ALIGN(rxdr->size, 4096);
 770
 771         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
 772
 773         if(!rxdr->desc) {
 774                 vfree(rxdr->buffer_info);
 775                 DPRINTK(PROBE, ERR,
 776                  "Unable to allocate receive descriptors\n");
 777                 return -ENOMEM;
 778         }
 779         memset(rxdr->desc, 0, rxdr->size);
 780
 781         rxdr->next_to_clean = 0;
 782         rxdr->next_to_use = 0;
 783
 784         return 0;
 785 }
 786
 787 /**
 788  * ixgb_setup_rctl - configure the receive control register
 789  * @adapter: Board private structure
 790  **/
 791
 792 static void
 793 ixgb_setup_rctl(struct ixgb_adapter *adapter)
 794 {
 795         uint32_t rctl;
 796
 797         rctl = IXGB_READ_REG(&adapter->hw, RCTL);
 798
 799         rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
 800
 801         rctl |=
 802                 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
 803                 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
 804                 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
 805
 806         rctl |= IXGB_RCTL_SECRC;
 807
 808         if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
 809                 rctl |= IXGB_RCTL_BSIZE_2048;
 810         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
 811                 rctl |= IXGB_RCTL_BSIZE_4096;
 812         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
 813                 rctl |= IXGB_RCTL_BSIZE_8192;
 814         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
 815                 rctl |= IXGB_RCTL_BSIZE_16384;
 816
 817         IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
 818 }
 819
 820 /**
 821  * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
 822  * @adapter: board private structure
 823  *
 824  * Configure the Rx unit of the MAC after a reset.
 825  **/
 826
 827 static void
 828 ixgb_configure_rx(struct ixgb_adapter *adapter)
 829 {
 830         uint64_t rdba = adapter->rx_ring.dma;
 831         uint32_t rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
 832         struct ixgb_hw *hw = &adapter->hw;
 833         uint32_t rctl;
 834         uint32_t rxcsum;
 835         uint32_t rxdctl;
 836
 837         /* make sure receives are disabled while setting up the descriptors */
 838
 839         rctl = IXGB_READ_REG(hw, RCTL);
 840         IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
 841
 842         /* set the Receive Delay Timer Register */
 843
 844         IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
 845
 846         /* Setup the Base and Length of the Rx Descriptor Ring */
 847
 848         IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
 849         IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
 850
 851         IXGB_WRITE_REG(hw, RDLEN, rdlen);
 852
 853         /* Setup the HW Rx Head and Tail Descriptor Pointers */
 854         IXGB_WRITE_REG(hw, RDH, 0);
 855         IXGB_WRITE_REG(hw, RDT, 0);
 856
 857         /* set up pre-fetching of receive buffers so we get some before we
 858          * run out (default hardware behavior is to run out before fetching
 859          * more).  This sets up to fetch if HTHRESH rx descriptors are avail
 860          * and the descriptors in hw cache are below PTHRESH.  This avoids
 861          * the hardware behavior of fetching <=512 descriptors in a single
 862          * burst that pre-empts all other activity, usually causing fifo
 863          * overflows. */
 864         /* use WTHRESH to burst write 16 descriptors or burst when RXT0 */
 865         rxdctl = RXDCTL_WTHRESH_DEFAULT << IXGB_RXDCTL_WTHRESH_SHIFT |
 866                  RXDCTL_HTHRESH_DEFAULT << IXGB_RXDCTL_HTHRESH_SHIFT |
 867                  RXDCTL_PTHRESH_DEFAULT << IXGB_RXDCTL_PTHRESH_SHIFT;
 868         IXGB_WRITE_REG(hw, RXDCTL, rxdctl);
 869
 870         /* Enable Receive Checksum Offload for TCP and UDP */
 871         if(adapter->rx_csum == TRUE) {
 872                 rxcsum = IXGB_READ_REG(hw, RXCSUM);
 873                 rxcsum |= IXGB_RXCSUM_TUOFL;
 874                 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
 875         }
 876
 877         /* Enable Receives */
 878
 879         IXGB_WRITE_REG(hw, RCTL, rctl);
 880 }
 881
 882 /**
 883  * ixgb_free_tx_resources - Free Tx Resources
 884  * @adapter: board private structure
 885  *
 886  * Free all transmit software resources
 887  **/
 888
 889 void
 890 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
 891 {
 892         struct pci_dev *pdev = adapter->pdev;
 893
 894         ixgb_clean_tx_ring(adapter);
 895
 896         vfree(adapter->tx_ring.buffer_info);
 897         adapter->tx_ring.buffer_info = NULL;
 898
 899         pci_free_consistent(pdev, adapter->tx_ring.size,
 900                             adapter->tx_ring.desc, adapter->tx_ring.dma);
 901
 902         adapter->tx_ring.desc = NULL;
 903 }
 904
 905 static void
 906 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
 907                                         struct ixgb_buffer *buffer_info)
 908 {
 909         struct pci_dev *pdev = adapter->pdev;
 910
 911         if (buffer_info->dma)
 912                 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length,
 913                                PCI_DMA_TODEVICE);
 914
 915         if (buffer_info->skb)
 916                 dev_kfree_skb_any(buffer_info->skb);
 917
 918         buffer_info->skb = NULL;
 919         buffer_info->dma = 0;
 920         buffer_info->time_stamp = 0;
 921         /* these fields must always be initialized in tx
 922          * buffer_info->length = 0;
 923          * buffer_info->next_to_watch = 0; */
 924 }
 925
 926 /**
 927  * ixgb_clean_tx_ring - Free Tx Buffers
 928  * @adapter: board private structure
 929  **/
 930
 931 static void
 932 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
 933 {
 934         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
 935         struct ixgb_buffer *buffer_info;
 936         unsigned long size;
 937         unsigned int i;
 938
 939         /* Free all the Tx ring sk_buffs */
 940
 941         for(i = 0; i < tx_ring->count; i++) {
 942                 buffer_info = &tx_ring->buffer_info[i];
 943                 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
 944         }
 945
 946         size = sizeof(struct ixgb_buffer) * tx_ring->count;
 947         memset(tx_ring->buffer_info, 0, size);
 948
 949         /* Zero out the descriptor ring */
 950
 951         memset(tx_ring->desc, 0, tx_ring->size);
 952
 953         tx_ring->next_to_use = 0;
 954         tx_ring->next_to_clean = 0;
 955
 956         IXGB_WRITE_REG(&adapter->hw, TDH, 0);
 957         IXGB_WRITE_REG(&adapter->hw, TDT, 0);
 958 }
 959
 960 /**
 961  * ixgb_free_rx_resources - Free Rx Resources
 962  * @adapter: board private structure
 963  *
 964  * Free all receive software resources
 965  **/
 966
 967 void
 968 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
 969 {
 970         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
 971         struct pci_dev *pdev = adapter->pdev;
 972
 973         ixgb_clean_rx_ring(adapter);
 974
 975         vfree(rx_ring->buffer_info);
 976         rx_ring->buffer_info = NULL;
 977
 978         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
 979
 980         rx_ring->desc = NULL;
 981 }
 982
 983 /**
 984  * ixgb_clean_rx_ring - Free Rx Buffers
 985  * @adapter: board private structure
 986  **/
 987
 988 static void
 989 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
 990 {
 991         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
 992         struct ixgb_buffer *buffer_info;
 993         struct pci_dev *pdev = adapter->pdev;
 994         unsigned long size;
 995         unsigned int i;
 996
 997         /* Free all the Rx ring sk_buffs */
 998
 999         for(i = 0; i < rx_ring->count; i++) {
1000                 buffer_info = &rx_ring->buffer_info[i];
1001                 if(buffer_info->skb) {
1002
1003                         pci_unmap_single(pdev,
1004                                          buffer_info->dma,
1005                                          buffer_info->length,
1006                                          PCI_DMA_FROMDEVICE);
1007
1008                         dev_kfree_skb(buffer_info->skb);
1009
1010                         buffer_info->skb = NULL;
1011                 }
1012         }
1013
1014         size = sizeof(struct ixgb_buffer) * rx_ring->count;
1015         memset(rx_ring->buffer_info, 0, size);
1016
1017         /* Zero out the descriptor ring */
1018
1019         memset(rx_ring->desc, 0, rx_ring->size);
1020
1021         rx_ring->next_to_clean = 0;
1022         rx_ring->next_to_use = 0;
1023
1024         IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1025         IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1026 }
1027
1028 /**
1029  * ixgb_set_mac - Change the Ethernet Address of the NIC
1030  * @netdev: network interface device structure
1031  * @p: pointer to an address structure
1032  *
1033  * Returns 0 on success, negative on failure
1034  **/
1035
1036 static int
1037 ixgb_set_mac(struct net_device *netdev, void *p)
1038 {
1039         struct ixgb_adapter *adapter = netdev_priv(netdev);
1040         struct sockaddr *addr = p;
1041
1042         if(!is_valid_ether_addr(addr->sa_data))
1043                 return -EADDRNOTAVAIL;
1044
1045         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1046
1047         ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1048
1049         return 0;
1050 }
1051
1052 /**
1053  * ixgb_set_multi - Multicast and Promiscuous mode set
1054  * @netdev: network interface device structure
1055  *
1056  * The set_multi entry point is called whenever the multicast address
1057  * list or the network interface flags are updated.  This routine is
1058  * responsible for configuring the hardware for proper multicast,
1059  * promiscuous mode, and all-multi behavior.
1060  **/
1061
1062 static void
1063 ixgb_set_multi(struct net_device *netdev)
1064 {
1065         struct ixgb_adapter *adapter = netdev_priv(netdev);
1066         struct ixgb_hw *hw = &adapter->hw;
1067         struct dev_mc_list *mc_ptr;
1068         uint32_t rctl;
1069         int i;
1070
1071         /* Check for Promiscuous and All Multicast modes */
1072
1073         rctl = IXGB_READ_REG(hw, RCTL);
1074
1075         if(netdev->flags & IFF_PROMISC) {
1076                 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1077         } else if(netdev->flags & IFF_ALLMULTI) {
1078                 rctl |= IXGB_RCTL_MPE;
1079                 rctl &= ~IXGB_RCTL_UPE;
1080         } else {
1081                 rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1082         }
1083
1084         if(netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1085                 rctl |= IXGB_RCTL_MPE;
1086                 IXGB_WRITE_REG(hw, RCTL, rctl);
1087         } else {
1088                 uint8_t mta[netdev->mc_count * IXGB_ETH_LENGTH_OF_ADDRESS];
1089
1090                 IXGB_WRITE_REG(hw, RCTL, rctl);
1091
1092                 for(i = 0, mc_ptr = netdev->mc_list; mc_ptr;
1093                         i++, mc_ptr = mc_ptr->next)
1094                         memcpy(&mta[i * IXGB_ETH_LENGTH_OF_ADDRESS],
1095                                    mc_ptr->dmi_addr, IXGB_ETH_LENGTH_OF_ADDRESS);
1096
1097                 ixgb_mc_addr_list_update(hw, mta, netdev->mc_count, 0);
1098         }
1099 }
1100
1101 /**
1102  * ixgb_watchdog - Timer Call-back
1103  * @data: pointer to netdev cast into an unsigned long
1104  **/
1105
1106 static void
1107 ixgb_watchdog(unsigned long data)
1108 {
1109         struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1110         struct net_device *netdev = adapter->netdev;
1111         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1112
1113         ixgb_check_for_link(&adapter->hw);
1114
1115         if (ixgb_check_for_bad_link(&adapter->hw)) {
1116                 /* force the reset path */
1117                 netif_stop_queue(netdev);
1118         }
1119
1120         if(adapter->hw.link_up) {
1121                 if(!netif_carrier_ok(netdev)) {
1122                         DPRINTK(LINK, INFO,
1123                                 "NIC Link is Up 10000 Mbps Full Duplex\n");
1124                         adapter->link_speed = 10000;
1125                         adapter->link_duplex = FULL_DUPLEX;
1126                         netif_carrier_on(netdev);
1127                         netif_wake_queue(netdev);
1128                 }
1129         } else {
1130                 if(netif_carrier_ok(netdev)) {
1131                         adapter->link_speed = 0;
1132                         adapter->link_duplex = 0;
1133                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
1134                         netif_carrier_off(netdev);
1135                         netif_stop_queue(netdev);
1136
1137                 }
1138         }
1139
1140         ixgb_update_stats(adapter);
1141
1142         if(!netif_carrier_ok(netdev)) {
1143                 if(IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1144                         /* We've lost link, so the controller stops DMA,
1145                          * but we've got queued Tx work that's never going
1146                          * to get done, so reset controller to flush Tx.
1147                          * (Do the reset outside of interrupt context). */
1148                         schedule_work(&adapter->tx_timeout_task);
1149                 }
1150         }
1151
1152         /* Force detection of hung controller every watchdog period */
1153         adapter->detect_tx_hung = TRUE;
1154
1155         /* generate an interrupt to force clean up of any stragglers */
1156         IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1157
1158         /* Reset the timer */
1159         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1160 }
1161
1162 #define IXGB_TX_FLAGS_CSUM              0x00000001
1163 #define IXGB_TX_FLAGS_VLAN              0x00000002
1164 #define IXGB_TX_FLAGS_TSO               0x00000004
1165
1166 static int
1167 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1168 {
1169         struct ixgb_context_desc *context_desc;
1170         unsigned int i;
1171         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1172         uint16_t ipcse, tucse, mss;
1173         int err;
1174
1175         if (likely(skb_is_gso(skb))) {
1176                 struct ixgb_buffer *buffer_info;
1177                 struct iphdr *iph;
1178
1179                 if (skb_header_cloned(skb)) {
1180                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1181                         if (err)
1182                                 return err;
1183                 }
1184
1185                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1186                 mss = skb_shinfo(skb)->gso_size;
1187                 iph = ip_hdr(skb);
1188                 iph->tot_len = 0;
1189                 iph->check = 0;
1190                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1191                                                          iph->daddr, 0,
1192                                                          IPPROTO_TCP, 0);
1193                 ipcss = skb_network_offset(skb);
1194                 ipcso = (void *)&(iph->check) - (void *)skb->data;
1195                 ipcse = skb_transport_offset(skb) - 1;
1196                 tucss = skb_transport_offset(skb);
1197                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1198                 tucse = 0;
1199
1200                 i = adapter->tx_ring.next_to_use;
1201                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1202                 buffer_info = &adapter->tx_ring.buffer_info[i];
1203                 WARN_ON(buffer_info->dma != 0);
1204
1205                 context_desc->ipcss = ipcss;
1206                 context_desc->ipcso = ipcso;
1207                 context_desc->ipcse = cpu_to_le16(ipcse);
1208                 context_desc->tucss = tucss;
1209                 context_desc->tucso = tucso;
1210                 context_desc->tucse = cpu_to_le16(tucse);
1211                 context_desc->mss = cpu_to_le16(mss);
1212                 context_desc->hdr_len = hdr_len;
1213                 context_desc->status = 0;
1214                 context_desc->cmd_type_len = cpu_to_le32(
1215                                                   IXGB_CONTEXT_DESC_TYPE
1216                                                 | IXGB_CONTEXT_DESC_CMD_TSE
1217                                                 | IXGB_CONTEXT_DESC_CMD_IP
1218                                                 | IXGB_CONTEXT_DESC_CMD_TCP
1219                                                 | IXGB_CONTEXT_DESC_CMD_IDE
1220                                                 | (skb->len - (hdr_len)));
1221
1222
1223                 if(++i == adapter->tx_ring.count) i = 0;
1224                 adapter->tx_ring.next_to_use = i;
1225
1226                 return 1;
1227         }
1228
1229         return 0;
1230 }
1231
1232 static boolean_t
1233 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1234 {
1235         struct ixgb_context_desc *context_desc;
1236         unsigned int i;
1237         uint8_t css, cso;
1238
1239         if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1240                 struct ixgb_buffer *buffer_info;
1241                 css = skb_transport_offset(skb);
1242                 cso = css + skb->csum_offset;
1243
1244                 i = adapter->tx_ring.next_to_use;
1245                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1246                 buffer_info = &adapter->tx_ring.buffer_info[i];
1247                 WARN_ON(buffer_info->dma != 0);
1248
1249                 context_desc->tucss = css;
1250                 context_desc->tucso = cso;
1251                 context_desc->tucse = 0;
1252                 /* zero out any previously existing data in one instruction */
1253                 *(uint32_t *)&(context_desc->ipcss) = 0;
1254                 context_desc->status = 0;
1255                 context_desc->hdr_len = 0;
1256                 context_desc->mss = 0;
1257                 context_desc->cmd_type_len =
1258                         cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1259                                     | IXGB_TX_DESC_CMD_IDE);
1260
1261                 if(++i == adapter->tx_ring.count) i = 0;
1262                 adapter->tx_ring.next_to_use = i;
1263
1264                 return TRUE;
1265         }
1266
1267         return FALSE;
1268 }
1269
1270 #define IXGB_MAX_TXD_PWR        14
1271 #define IXGB_MAX_DATA_PER_TXD   (1<<IXGB_MAX_TXD_PWR)
1272
1273 static int
1274 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1275             unsigned int first)
1276 {
1277         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1278         struct ixgb_buffer *buffer_info;
1279         int len = skb->len;
1280         unsigned int offset = 0, size, count = 0, i;
1281         unsigned int mss = skb_shinfo(skb)->gso_size;
1282
1283         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1284         unsigned int f;
1285
1286         len -= skb->data_len;
1287
1288         i = tx_ring->next_to_use;
1289
1290         while(len) {
1291                 buffer_info = &tx_ring->buffer_info[i];
1292                 size = min(len, IXGB_MAX_DATA_PER_TXD);
1293                 /* Workaround for premature desc write-backs
1294                  * in TSO mode.  Append 4-byte sentinel desc */
1295                 if (unlikely(mss && !nr_frags && size == len && size > 8))
1296                         size -= 4;
1297
1298                 buffer_info->length = size;
1299                 WARN_ON(buffer_info->dma != 0);
1300                 buffer_info->dma =
1301                         pci_map_single(adapter->pdev,
1302                                 skb->data + offset,
1303                                 size,
1304                                 PCI_DMA_TODEVICE);
1305                 buffer_info->time_stamp = jiffies;
1306                 buffer_info->next_to_watch = 0;
1307
1308                 len -= size;
1309                 offset += size;
1310                 count++;
1311                 if(++i == tx_ring->count) i = 0;
1312         }
1313
1314         for(f = 0; f < nr_frags; f++) {
1315                 struct skb_frag_struct *frag;
1316
1317                 frag = &skb_shinfo(skb)->frags[f];
1318                 len = frag->size;
1319                 offset = 0;
1320
1321                 while(len) {
1322                         buffer_info = &tx_ring->buffer_info[i];
1323                         size = min(len, IXGB_MAX_DATA_PER_TXD);
1324
1325                         /* Workaround for premature desc write-backs
1326                          * in TSO mode.  Append 4-byte sentinel desc */
1327                         if (unlikely(mss && !nr_frags && size == len
1328                                      && size > 8))
1329                                 size -= 4;
1330
1331                         buffer_info->length = size;
1332                         buffer_info->dma =
1333                                 pci_map_page(adapter->pdev,
1334                                         frag->page,
1335                                         frag->page_offset + offset,
1336                                         size,
1337                                         PCI_DMA_TODEVICE);
1338                         buffer_info->time_stamp = jiffies;
1339                         buffer_info->next_to_watch = 0;
1340
1341                         len -= size;
1342                         offset += size;
1343                         count++;
1344                         if(++i == tx_ring->count) i = 0;
1345                 }
1346         }
1347         i = (i == 0) ? tx_ring->count - 1 : i - 1;
1348         tx_ring->buffer_info[i].skb = skb;
1349         tx_ring->buffer_info[first].next_to_watch = i;
1350
1351         return count;
1352 }
1353
1354 static void
1355 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1356 {
1357         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1358         struct ixgb_tx_desc *tx_desc = NULL;
1359         struct ixgb_buffer *buffer_info;
1360         uint32_t cmd_type_len = adapter->tx_cmd_type;
1361         uint8_t status = 0;
1362         uint8_t popts = 0;
1363         unsigned int i;
1364
1365         if(tx_flags & IXGB_TX_FLAGS_TSO) {
1366                 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1367                 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1368         }
1369
1370         if(tx_flags & IXGB_TX_FLAGS_CSUM)
1371                 popts |= IXGB_TX_DESC_POPTS_TXSM;
1372
1373         if(tx_flags & IXGB_TX_FLAGS_VLAN) {
1374                 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1375         }
1376
1377         i = tx_ring->next_to_use;
1378
1379         while(count--) {
1380                 buffer_info = &tx_ring->buffer_info[i];
1381                 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1382                 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1383                 tx_desc->cmd_type_len =
1384                         cpu_to_le32(cmd_type_len | buffer_info->length);
1385                 tx_desc->status = status;
1386                 tx_desc->popts = popts;
1387                 tx_desc->vlan = cpu_to_le16(vlan_id);
1388
1389                 if(++i == tx_ring->count) i = 0;
1390         }
1391
1392         tx_desc->cmd_type_len |= cpu_to_le32(IXGB_TX_DESC_CMD_EOP
1393                                 | IXGB_TX_DESC_CMD_RS );
1394
1395         /* Force memory writes to complete before letting h/w
1396          * know there are new descriptors to fetch.  (Only
1397          * applicable for weak-ordered memory model archs,
1398          * such as IA-64). */
1399         wmb();
1400
1401         tx_ring->next_to_use = i;
1402         IXGB_WRITE_REG(&adapter->hw, TDT, i);
1403 }
1404
1405 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1406 {
1407         struct ixgb_adapter *adapter = netdev_priv(netdev);
1408         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1409
1410         netif_stop_queue(netdev);
1411         /* Herbert's original patch had:
1412          *  smp_mb__after_netif_stop_queue();
1413          * but since that doesn't exist yet, just open code it. */
1414         smp_mb();
1415
1416         /* We need to check again in a case another CPU has just
1417          * made room available. */
1418         if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1419                 return -EBUSY;
1420
1421         /* A reprieve! */
1422         netif_start_queue(netdev);
1423         ++adapter->restart_queue;
1424         return 0;
1425 }
1426
1427 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1428                               struct ixgb_desc_ring *tx_ring, int size)
1429 {
1430         if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1431                 return 0;
1432         return __ixgb_maybe_stop_tx(netdev, size);
1433 }
1434
1435
1436 /* Tx Descriptors needed, worst case */
1437 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1438                          (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1439 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1440         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1441         + 1 /* one more needed for sentinel TSO workaround */
1442
1443 static int
1444 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1445 {
1446         struct ixgb_adapter *adapter = netdev_priv(netdev);
1447         unsigned int first;
1448         unsigned int tx_flags = 0;
1449         unsigned long flags;
1450         int vlan_id = 0;
1451         int tso;
1452
1453         if(skb->len <= 0) {
1454                 dev_kfree_skb_any(skb);
1455                 return 0;
1456         }
1457
1458 #ifdef NETIF_F_LLTX
1459         local_irq_save(flags);
1460         if (!spin_trylock(&adapter->tx_lock)) {
1461                 /* Collision - tell upper layer to requeue */
1462                 local_irq_restore(flags);
1463                 return NETDEV_TX_LOCKED;
1464         }
1465 #else
1466         spin_lock_irqsave(&adapter->tx_lock, flags);
1467 #endif
1468
1469         if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1470                      DESC_NEEDED))) {
1471                 netif_stop_queue(netdev);
1472                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1473                 return NETDEV_TX_BUSY;
1474         }
1475
1476 #ifndef NETIF_F_LLTX
1477         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1478 #endif
1479
1480         if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1481                 tx_flags |= IXGB_TX_FLAGS_VLAN;
1482                 vlan_id = vlan_tx_tag_get(skb);
1483         }
1484
1485         first = adapter->tx_ring.next_to_use;
1486
1487         tso = ixgb_tso(adapter, skb);
1488         if (tso < 0) {
1489                 dev_kfree_skb_any(skb);
1490 #ifdef NETIF_F_LLTX
1491                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1492 #endif
1493                 return NETDEV_TX_OK;
1494         }
1495
1496         if (likely(tso))
1497                 tx_flags |= IXGB_TX_FLAGS_TSO;
1498         else if(ixgb_tx_csum(adapter, skb))
1499                 tx_flags |= IXGB_TX_FLAGS_CSUM;
1500
1501         ixgb_tx_queue(adapter, ixgb_tx_map(adapter, skb, first), vlan_id,
1502                         tx_flags);
1503
1504         netdev->trans_start = jiffies;
1505
1506 #ifdef NETIF_F_LLTX
1507         /* Make sure there is space in the ring for the next send. */
1508         ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1509
1510         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1511
1512 #endif
1513         return NETDEV_TX_OK;
1514 }
1515
1516 /**
1517  * ixgb_tx_timeout - Respond to a Tx Hang
1518  * @netdev: network interface device structure
1519  **/
1520
1521 static void
1522 ixgb_tx_timeout(struct net_device *netdev)
1523 {
1524         struct ixgb_adapter *adapter = netdev_priv(netdev);
1525
1526         /* Do the reset outside of interrupt context */
1527         schedule_work(&adapter->tx_timeout_task);
1528 }
1529
1530 static void
1531 ixgb_tx_timeout_task(struct work_struct *work)
1532 {
1533         struct ixgb_adapter *adapter =
1534                 container_of(work, struct ixgb_adapter, tx_timeout_task);
1535
1536         adapter->tx_timeout_count++;
1537         ixgb_down(adapter, TRUE);
1538         ixgb_up(adapter);
1539 }
1540
1541 /**
1542  * ixgb_get_stats - Get System Network Statistics
1543  * @netdev: network interface device structure
1544  *
1545  * Returns the address of the device statistics structure.
1546  * The statistics are actually updated from the timer callback.
1547  **/
1548
1549 static struct net_device_stats *
1550 ixgb_get_stats(struct net_device *netdev)
1551 {
1552         struct ixgb_adapter *adapter = netdev_priv(netdev);
1553
1554         return &adapter->net_stats;
1555 }
1556
1557 /**
1558  * ixgb_change_mtu - Change the Maximum Transfer Unit
1559  * @netdev: network interface device structure
1560  * @new_mtu: new value for maximum frame size
1561  *
1562  * Returns 0 on success, negative on failure
1563  **/
1564
1565 static int
1566 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1567 {
1568         struct ixgb_adapter *adapter = netdev_priv(netdev);
1569         int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1570         int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1571
1572
1573         if((max_frame < IXGB_MIN_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH)
1574            || (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1575                 DPRINTK(PROBE, ERR, "Invalid MTU setting %d\n", new_mtu);
1576                 return -EINVAL;
1577         }
1578
1579         adapter->rx_buffer_len = max_frame;
1580
1581         netdev->mtu = new_mtu;
1582
1583         if ((old_max_frame != max_frame) && netif_running(netdev)) {
1584                 ixgb_down(adapter, TRUE);
1585                 ixgb_up(adapter);
1586         }
1587
1588         return 0;
1589 }
1590
1591 /**
1592  * ixgb_update_stats - Update the board statistics counters.
1593  * @adapter: board private structure
1594  **/
1595
1596 void
1597 ixgb_update_stats(struct ixgb_adapter *adapter)
1598 {
1599         struct net_device *netdev = adapter->netdev;
1600         struct pci_dev *pdev = adapter->pdev;
1601
1602         /* Prevent stats update while adapter is being reset */
1603         if (pci_channel_offline(pdev))
1604                 return;
1605
1606         if((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1607            (netdev->mc_count > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1608                 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1609                 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1610                 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1611                 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1612
1613                 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1614                 /* fix up multicast stats by removing broadcasts */
1615                 if(multi >= bcast)
1616                         multi -= bcast;
1617
1618                 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1619                 adapter->stats.mprch += (multi >> 32);
1620                 adapter->stats.bprcl += bcast_l;
1621                 adapter->stats.bprch += bcast_h;
1622         } else {
1623                 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1624                 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1625                 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1626                 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1627         }
1628         adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1629         adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1630         adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1631         adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1632         adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1633         adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1634         adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1635         adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1636         adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1637         adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1638         adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1639         adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1640         adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1641         adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1642         adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1643         adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1644         adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1645         adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1646         adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1647         adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1648         adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1649         adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1650         adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1651         adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1652         adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1653         adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1654         adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1655         adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1656         adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1657         adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1658         adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1659         adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1660         adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1661         adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1662         adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1663         adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1664         adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1665         adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1666         adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1667         adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1668         adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1669         adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1670         adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1671         adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1672         adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1673         adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1674         adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1675         adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1676         adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1677         adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1678         adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1679         adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1680         adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1681         adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1682         adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1683         adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1684
1685         /* Fill out the OS statistics structure */
1686
1687         adapter->net_stats.rx_packets = adapter->stats.gprcl;
1688         adapter->net_stats.tx_packets = adapter->stats.gptcl;
1689         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
1690         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
1691         adapter->net_stats.multicast = adapter->stats.mprcl;
1692         adapter->net_stats.collisions = 0;
1693
1694         /* ignore RLEC as it reports errors for padded (<64bytes) frames
1695          * with a length in the type/len field */
1696         adapter->net_stats.rx_errors =
1697             /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1698             adapter->stats.ruc +
1699             adapter->stats.roc /*+ adapter->stats.rlec */  +
1700             adapter->stats.icbc +
1701             adapter->stats.ecbc + adapter->stats.mpc;
1702
1703         /* see above
1704          * adapter->net_stats.rx_length_errors = adapter->stats.rlec;
1705          */
1706
1707         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
1708         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
1709         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
1710         adapter->net_stats.rx_over_errors = adapter->stats.mpc;
1711
1712         adapter->net_stats.tx_errors = 0;
1713         adapter->net_stats.rx_frame_errors = 0;
1714         adapter->net_stats.tx_aborted_errors = 0;
1715         adapter->net_stats.tx_carrier_errors = 0;
1716         adapter->net_stats.tx_fifo_errors = 0;
1717         adapter->net_stats.tx_heartbeat_errors = 0;
1718         adapter->net_stats.tx_window_errors = 0;
1719 }
1720
1721 #define IXGB_MAX_INTR 10
1722 /**
1723  * ixgb_intr - Interrupt Handler
1724  * @irq: interrupt number
1725  * @data: pointer to a network interface device structure
1726  **/
1727
1728 static irqreturn_t
1729 ixgb_intr(int irq, void *data)
1730 {
1731         struct net_device *netdev = data;
1732         struct ixgb_adapter *adapter = netdev_priv(netdev);
1733         struct ixgb_hw *hw = &adapter->hw;
1734         uint32_t icr = IXGB_READ_REG(hw, ICR);
1735 #ifndef CONFIG_IXGB_NAPI
1736         unsigned int i;
1737 #endif
1738
1739         if(unlikely(!icr))
1740                 return IRQ_NONE;  /* Not our interrupt */
1741
1742         if(unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC))) {
1743                 mod_timer(&adapter->watchdog_timer, jiffies);
1744         }
1745
1746 #ifdef CONFIG_IXGB_NAPI
1747         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1748
1749                 /* Disable interrupts and register for poll. The flush
1750                   of the posted write is intentionally left out.
1751                 */
1752
1753                 atomic_inc(&adapter->irq_sem);
1754                 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1755                 __netif_rx_schedule(netdev, &adapter->napi);
1756         }
1757 #else
1758         /* yes, that is actually a & and it is meant to make sure that
1759          * every pass through this for loop checks both receive and
1760          * transmit queues for completed descriptors, intended to
1761          * avoid starvation issues and assist tx/rx fairness. */
1762         for(i = 0; i < IXGB_MAX_INTR; i++)
1763                 if(!ixgb_clean_rx_irq(adapter) &
1764                    !ixgb_clean_tx_irq(adapter))
1765                         break;
1766 #endif
1767         return IRQ_HANDLED;
1768 }
1769
1770 #ifdef CONFIG_IXGB_NAPI
1771 /**
1772  * ixgb_clean - NAPI Rx polling callback
1773  * @adapter: board private structure
1774  **/
1775
1776 static int
1777 ixgb_clean(struct napi_struct *napi, int budget)
1778 {
1779         struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1780         struct net_device *netdev = adapter->netdev;
1781         int tx_cleaned;
1782         int work_done = 0;
1783
1784         tx_cleaned = ixgb_clean_tx_irq(adapter);
1785         ixgb_clean_rx_irq(adapter, &work_done, budget);
1786
1787         /* if no Tx and not enough Rx work done, exit the polling mode */
1788         if((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
1789                 netif_rx_complete(netdev, napi);
1790                 ixgb_irq_enable(adapter);
1791         }
1792
1793         return work_done;
1794 }
1795 #endif
1796
1797 /**
1798  * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1799  * @adapter: board private structure
1800  **/
1801
1802 static boolean_t
1803 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1804 {
1805         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1806         struct net_device *netdev = adapter->netdev;
1807         struct ixgb_tx_desc *tx_desc, *eop_desc;
1808         struct ixgb_buffer *buffer_info;
1809         unsigned int i, eop;
1810         boolean_t cleaned = FALSE;
1811
1812         i = tx_ring->next_to_clean;
1813         eop = tx_ring->buffer_info[i].next_to_watch;
1814         eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1815
1816         while(eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1817
1818                 for(cleaned = FALSE; !cleaned; ) {
1819                         tx_desc = IXGB_TX_DESC(*tx_ring, i);
1820                         buffer_info = &tx_ring->buffer_info[i];
1821
1822                         if (tx_desc->popts
1823                             & (IXGB_TX_DESC_POPTS_TXSM |
1824                                IXGB_TX_DESC_POPTS_IXSM))
1825                                 adapter->hw_csum_tx_good++;
1826
1827                         ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1828
1829                         *(uint32_t *)&(tx_desc->status) = 0;
1830
1831                         cleaned = (i == eop);
1832                         if(++i == tx_ring->count) i = 0;
1833                 }
1834
1835                 eop = tx_ring->buffer_info[i].next_to_watch;
1836                 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1837         }
1838
1839         tx_ring->next_to_clean = i;
1840
1841         if (unlikely(netif_queue_stopped(netdev))) {
1842                 spin_lock(&adapter->tx_lock);
1843                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
1844                     (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
1845                         netif_wake_queue(netdev);
1846                 spin_unlock(&adapter->tx_lock);
1847         }
1848
1849         if(adapter->detect_tx_hung) {
1850                 /* detect a transmit hang in hardware, this serializes the
1851                  * check with the clearing of time_stamp and movement of i */
1852                 adapter->detect_tx_hung = FALSE;
1853                 if (tx_ring->buffer_info[eop].dma &&
1854                    time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1855                    && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1856                         IXGB_STATUS_TXOFF)) {
1857                         /* detected Tx unit hang */
1858                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
1859                                         "  TDH                  <%x>\n"
1860                                         "  TDT                  <%x>\n"
1861                                         "  next_to_use          <%x>\n"
1862                                         "  next_to_clean        <%x>\n"
1863                                         "buffer_info[next_to_clean]\n"
1864                                         "  time_stamp           <%lx>\n"
1865                                         "  next_to_watch        <%x>\n"
1866                                         "  jiffies              <%lx>\n"
1867                                         "  next_to_watch.status <%x>\n",
1868                                 IXGB_READ_REG(&adapter->hw, TDH),
1869                                 IXGB_READ_REG(&adapter->hw, TDT),
1870                                 tx_ring->next_to_use,
1871                                 tx_ring->next_to_clean,
1872                                 tx_ring->buffer_info[eop].time_stamp,
1873                                 eop,
1874                                 jiffies,
1875                                 eop_desc->status);
1876                         netif_stop_queue(netdev);
1877                 }
1878         }
1879
1880         return cleaned;
1881 }
1882
1883 /**
1884  * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1885  * @adapter: board private structure
1886  * @rx_desc: receive descriptor
1887  * @sk_buff: socket buffer with received data
1888  **/
1889
1890 static void
1891 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1892                  struct ixgb_rx_desc *rx_desc,
1893                  struct sk_buff *skb)
1894 {
1895         /* Ignore Checksum bit is set OR
1896          * TCP Checksum has not been calculated
1897          */
1898         if((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1899            (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1900                 skb->ip_summed = CHECKSUM_NONE;
1901                 return;
1902         }
1903
1904         /* At this point we know the hardware did the TCP checksum */
1905         /* now look at the TCP checksum error bit */
1906         if(rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1907                 /* let the stack verify checksum errors */
1908                 skb->ip_summed = CHECKSUM_NONE;
1909                 adapter->hw_csum_rx_error++;
1910         } else {
1911                 /* TCP checksum is good */
1912                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1913                 adapter->hw_csum_rx_good++;
1914         }
1915 }
1916
1917 /**
1918  * ixgb_clean_rx_irq - Send received data up the network stack,
1919  * @adapter: board private structure
1920  **/
1921
1922 static boolean_t
1923 #ifdef CONFIG_IXGB_NAPI
1924 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
1925 #else
1926 ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
1927 #endif
1928 {
1929         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1930         struct net_device *netdev = adapter->netdev;
1931         struct pci_dev *pdev = adapter->pdev;
1932         struct ixgb_rx_desc *rx_desc, *next_rxd;
1933         struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
1934         uint32_t length;
1935         unsigned int i, j;
1936         boolean_t cleaned = FALSE;
1937
1938         i = rx_ring->next_to_clean;
1939         rx_desc = IXGB_RX_DESC(*rx_ring, i);
1940         buffer_info = &rx_ring->buffer_info[i];
1941
1942         while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
1943                 struct sk_buff *skb, *next_skb;
1944                 u8 status;
1945
1946 #ifdef CONFIG_IXGB_NAPI
1947                 if(*work_done >= work_to_do)
1948                         break;
1949
1950                 (*work_done)++;
1951 #endif
1952                 status = rx_desc->status;
1953                 skb = buffer_info->skb;
1954                 buffer_info->skb = NULL;
1955
1956                 prefetch(skb->data);
1957
1958                 if(++i == rx_ring->count) i = 0;
1959                 next_rxd = IXGB_RX_DESC(*rx_ring, i);
1960                 prefetch(next_rxd);
1961
1962                 if((j = i + 1) == rx_ring->count) j = 0;
1963                 next2_buffer = &rx_ring->buffer_info[j];
1964                 prefetch(next2_buffer);
1965
1966                 next_buffer = &rx_ring->buffer_info[i];
1967                 next_skb = next_buffer->skb;
1968                 prefetch(next_skb);
1969
1970                 cleaned = TRUE;
1971
1972                 pci_unmap_single(pdev,
1973                                  buffer_info->dma,
1974                                  buffer_info->length,
1975                                  PCI_DMA_FROMDEVICE);
1976
1977                 length = le16_to_cpu(rx_desc->length);
1978
1979                 if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
1980
1981                         /* All receives must fit into a single buffer */
1982
1983                         IXGB_DBG("Receive packet consumed multiple buffers "
1984                                          "length<%x>\n", length);
1985
1986                         dev_kfree_skb_irq(skb);
1987                         goto rxdesc_done;
1988                 }
1989
1990                 if (unlikely(rx_desc->errors
1991                              & (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE
1992                                 | IXGB_RX_DESC_ERRORS_P |
1993                                 IXGB_RX_DESC_ERRORS_RXE))) {
1994
1995                         dev_kfree_skb_irq(skb);
1996                         goto rxdesc_done;
1997                 }
1998
1999                 /* code added for copybreak, this should improve
2000                  * performance for small packets with large amounts
2001                  * of reassembly being done in the stack */
2002 #define IXGB_CB_LENGTH 256
2003                 if (length < IXGB_CB_LENGTH) {
2004                         struct sk_buff *new_skb =
2005                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
2006                         if (new_skb) {
2007                                 skb_reserve(new_skb, NET_IP_ALIGN);
2008                                 skb_copy_to_linear_data_offset(new_skb,
2009                                                                -NET_IP_ALIGN,
2010                                                                (skb->data -
2011                                                                 NET_IP_ALIGN),
2012                                                                (length +
2013                                                                 NET_IP_ALIGN));
2014                                 /* save the skb in buffer_info as good */
2015                                 buffer_info->skb = skb;
2016                                 skb = new_skb;
2017                         }
2018                 }
2019                 /* end copybreak code */
2020
2021                 /* Good Receive */
2022                 skb_put(skb, length);
2023
2024                 /* Receive Checksum Offload */
2025                 ixgb_rx_checksum(adapter, rx_desc, skb);
2026
2027                 skb->protocol = eth_type_trans(skb, netdev);
2028 #ifdef CONFIG_IXGB_NAPI
2029                 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2030                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2031                                 le16_to_cpu(rx_desc->special) &
2032                                         IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2033                 } else {
2034                         netif_receive_skb(skb);
2035                 }
2036 #else /* CONFIG_IXGB_NAPI */
2037                 if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
2038                         vlan_hwaccel_rx(skb, adapter->vlgrp,
2039                                 le16_to_cpu(rx_desc->special) &
2040                                         IXGB_RX_DESC_SPECIAL_VLAN_MASK);
2041                 } else {
2042                         netif_rx(skb);
2043                 }
2044 #endif /* CONFIG_IXGB_NAPI */
2045                 netdev->last_rx = jiffies;
2046
2047 rxdesc_done:
2048                 /* clean up descriptor, might be written over by hw */
2049                 rx_desc->status = 0;
2050
2051                 /* use prefetched values */
2052                 rx_desc = next_rxd;
2053                 buffer_info = next_buffer;
2054         }
2055
2056         rx_ring->next_to_clean = i;
2057
2058         ixgb_alloc_rx_buffers(adapter);
2059
2060         return cleaned;
2061 }
2062
2063 /**
2064  * ixgb_alloc_rx_buffers - Replace used receive buffers
2065  * @adapter: address of board private structure
2066  **/
2067
2068 static void
2069 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter)
2070 {
2071         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2072         struct net_device *netdev = adapter->netdev;
2073         struct pci_dev *pdev = adapter->pdev;
2074         struct ixgb_rx_desc *rx_desc;
2075         struct ixgb_buffer *buffer_info;
2076         struct sk_buff *skb;
2077         unsigned int i;
2078         int num_group_tail_writes;
2079         long cleancount;
2080
2081         i = rx_ring->next_to_use;
2082         buffer_info = &rx_ring->buffer_info[i];
2083         cleancount = IXGB_DESC_UNUSED(rx_ring);
2084
2085         num_group_tail_writes = IXGB_RX_BUFFER_WRITE;
2086
2087         /* leave three descriptors unused */
2088         while(--cleancount > 2) {
2089                 /* recycle! its good for you */
2090                 skb = buffer_info->skb;
2091                 if (skb) {
2092                         skb_trim(skb, 0);
2093                         goto map_skb;
2094                 }
2095
2096                 skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
2097                                        + NET_IP_ALIGN);
2098                 if (unlikely(!skb)) {
2099                         /* Better luck next round */
2100                         adapter->alloc_rx_buff_failed++;
2101                         break;
2102                 }
2103
2104                 /* Make buffer alignment 2 beyond a 16 byte boundary
2105                  * this will result in a 16 byte aligned IP header after
2106                  * the 14 byte MAC header is removed
2107                  */
2108                 skb_reserve(skb, NET_IP_ALIGN);
2109
2110                 buffer_info->skb = skb;
2111                 buffer_info->length = adapter->rx_buffer_len;
2112 map_skb:
2113                 buffer_info->dma = pci_map_single(pdev,
2114                                                   skb->data,
2115                                                   adapter->rx_buffer_len,
2116                                                   PCI_DMA_FROMDEVICE);
2117
2118                 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2119                 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2120                 /* guarantee DD bit not set now before h/w gets descriptor
2121                  * this is the rest of the workaround for h/w double
2122                  * writeback. */
2123                 rx_desc->status = 0;
2124
2125
2126                 if(++i == rx_ring->count) i = 0;
2127                 buffer_info = &rx_ring->buffer_info[i];
2128         }
2129
2130         if (likely(rx_ring->next_to_use != i)) {
2131                 rx_ring->next_to_use = i;
2132                 if (unlikely(i-- == 0))
2133                         i = (rx_ring->count - 1);
2134
2135                 /* Force memory writes to complete before letting h/w
2136                  * know there are new descriptors to fetch.  (Only
2137                  * applicable for weak-ordered memory model archs, such
2138                  * as IA-64). */
2139                 wmb();
2140                 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2141         }
2142 }
2143
2144 /**
2145  * ixgb_vlan_rx_register - enables or disables vlan tagging/stripping.
2146  *
2147  * @param netdev network interface device structure
2148  * @param grp indicates to enable or disable tagging/stripping
2149  **/
2150 static void
2151 ixgb_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2152 {
2153         struct ixgb_adapter *adapter = netdev_priv(netdev);
2154         uint32_t ctrl, rctl;
2155
2156         ixgb_irq_disable(adapter);
2157         adapter->vlgrp = grp;
2158
2159         if(grp) {
2160                 /* enable VLAN tag insert/strip */
2161                 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2162                 ctrl |= IXGB_CTRL0_VME;
2163                 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2164
2165                 /* enable VLAN receive filtering */
2166
2167                 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2168                 rctl |= IXGB_RCTL_VFE;
2169                 rctl &= ~IXGB_RCTL_CFIEN;
2170                 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2171         } else {
2172                 /* disable VLAN tag insert/strip */
2173
2174                 ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2175                 ctrl &= ~IXGB_CTRL0_VME;
2176                 IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2177
2178                 /* disable VLAN filtering */
2179
2180                 rctl = IXGB_READ_REG(&adapter->hw, RCTL);
2181                 rctl &= ~IXGB_RCTL_VFE;
2182                 IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
2183         }
2184
2185         ixgb_irq_enable(adapter);
2186 }
2187
2188 static void
2189 ixgb_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2190 {
2191         struct ixgb_adapter *adapter = netdev_priv(netdev);
2192         uint32_t vfta, index;
2193
2194         /* add VID to filter table */
2195
2196         index = (vid >> 5) & 0x7F;
2197         vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2198         vfta |= (1 << (vid & 0x1F));
2199         ixgb_write_vfta(&adapter->hw, index, vfta);
2200 }
2201
2202 static void
2203 ixgb_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2204 {
2205         struct ixgb_adapter *adapter = netdev_priv(netdev);
2206         uint32_t vfta, index;
2207
2208         ixgb_irq_disable(adapter);
2209
2210         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2211
2212         ixgb_irq_enable(adapter);
2213
2214         /* remove VID from filter table*/
2215
2216         index = (vid >> 5) & 0x7F;
2217         vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2218         vfta &= ~(1 << (vid & 0x1F));
2219         ixgb_write_vfta(&adapter->hw, index, vfta);
2220 }
2221
2222 static void
2223 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2224 {
2225         ixgb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2226
2227         if(adapter->vlgrp) {
2228                 uint16_t vid;
2229                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2230                         if(!vlan_group_get_device(adapter->vlgrp, vid))
2231                                 continue;
2232                         ixgb_vlan_rx_add_vid(adapter->netdev, vid);
2233                 }
2234         }
2235 }
2236
2237 #ifdef CONFIG_NET_POLL_CONTROLLER
2238 /*
2239  * Polling 'interrupt' - used by things like netconsole to send skbs
2240  * without having to re-enable interrupts. It's not called while
2241  * the interrupt routine is executing.
2242  */
2243
2244 static void ixgb_netpoll(struct net_device *dev)
2245 {
2246         struct ixgb_adapter *adapter = netdev_priv(dev);
2247
2248         disable_irq(adapter->pdev->irq);
2249         ixgb_intr(adapter->pdev->irq, dev);
2250         enable_irq(adapter->pdev->irq);
2251 }
2252 #endif
2253
2254 /**
2255  * ixgb_io_error_detected() - called when PCI error is detected
2256  * @pdev    pointer to pci device with error
2257  * @state   pci channel state after error
2258  *
2259  * This callback is called by the PCI subsystem whenever
2260  * a PCI bus error is detected.
2261  */
2262 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
2263                                      enum pci_channel_state state)
2264 {
2265         struct net_device *netdev = pci_get_drvdata(pdev);
2266         struct ixgb_adapter *adapter = netdev_priv(netdev);
2267
2268         if(netif_running(netdev))
2269                 ixgb_down(adapter, TRUE);
2270
2271         pci_disable_device(pdev);
2272
2273         /* Request a slot reset. */
2274         return PCI_ERS_RESULT_NEED_RESET;
2275 }
2276
2277 /**
2278  * ixgb_io_slot_reset - called after the pci bus has been reset.
2279  * @pdev    pointer to pci device with error
2280  *
2281  * This callback is called after the PCI buss has been reset.
2282  * Basically, this tries to restart the card from scratch.
2283  * This is a shortened version of the device probe/discovery code,
2284  * it resembles the first-half of the ixgb_probe() routine.
2285  */
2286 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev)
2287 {
2288         struct net_device *netdev = pci_get_drvdata(pdev);
2289         struct ixgb_adapter *adapter = netdev_priv(netdev);
2290
2291         if(pci_enable_device(pdev)) {
2292                 DPRINTK(PROBE, ERR, "Cannot re-enable PCI device after reset.\n");
2293                 return PCI_ERS_RESULT_DISCONNECT;
2294         }
2295
2296         /* Perform card reset only on one instance of the card */
2297         if (0 != PCI_FUNC (pdev->devfn))
2298                 return PCI_ERS_RESULT_RECOVERED;
2299
2300         pci_set_master(pdev);
2301
2302         netif_carrier_off(netdev);
2303         netif_stop_queue(netdev);
2304         ixgb_reset(adapter);
2305
2306         /* Make sure the EEPROM is good */
2307         if(!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2308                 DPRINTK(PROBE, ERR, "After reset, the EEPROM checksum is not valid.\n");
2309                 return PCI_ERS_RESULT_DISCONNECT;
2310         }
2311         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2312         memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2313
2314         if(!is_valid_ether_addr(netdev->perm_addr)) {
2315                 DPRINTK(PROBE, ERR, "After reset, invalid MAC address.\n");
2316                 return PCI_ERS_RESULT_DISCONNECT;
2317         }
2318
2319         return PCI_ERS_RESULT_RECOVERED;
2320 }
2321
2322 /**
2323  * ixgb_io_resume - called when its OK to resume normal operations
2324  * @pdev    pointer to pci device with error
2325  *
2326  * The error recovery driver tells us that its OK to resume
2327  * normal operation. Implementation resembles the second-half
2328  * of the ixgb_probe() routine.
2329  */
2330 static void ixgb_io_resume (struct pci_dev *pdev)
2331 {
2332         struct net_device *netdev = pci_get_drvdata(pdev);
2333         struct ixgb_adapter *adapter = netdev_priv(netdev);
2334
2335         pci_set_master(pdev);
2336
2337         if(netif_running(netdev)) {
2338                 if(ixgb_up(adapter)) {
2339                         printk ("ixgb: can't bring device back up after reset\n");
2340                         return;
2341                 }
2342         }
2343
2344         netif_device_attach(netdev);
2345         mod_timer(&adapter->watchdog_timer, jiffies);
2346 }
2347
2348 /* ixgb_main.c */