drivers/net/ethernet/intel/ixgb/ixgb_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/10GbE Linux driver
   4   Copyright(c) 1999 - 2008 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/prefetch.h>
  32 #include "ixgb.h"
  33
  34 char ixgb_driver_name[] = "ixgb";
  35 static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
  36
  37 #define DRIVERNAPI "-NAPI"
  38 #define DRV_VERSION "1.0.135-k2" DRIVERNAPI
  39 const char ixgb_driver_version[] = DRV_VERSION;
  40 static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";
  41
  42 #define IXGB_CB_LENGTH 256
  43 static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
  44 module_param(copybreak, uint, 0644);
  45 MODULE_PARM_DESC(copybreak,
  46         "Maximum size of packet that is copied to a new buffer on receive");
  47
  48 /* ixgb_pci_tbl - PCI Device ID Table
  49  *
  50  * Wildcard entries (PCI_ANY_ID) should come last
  51  * Last entry must be all 0s
  52  *
  53  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  54  *   Class, Class Mask, private data (not used) }
  55  */
  56 static DEFINE_PCI_DEVICE_TABLE(ixgb_pci_tbl) = {
  57         {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX,
  58          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  59         {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4,
  60          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  61         {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR,
  62          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  63         {PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_LR,
  64          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  65
  66         /* required last entry */
  67         {0,}
  68 };
  69
  70 MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);
  71
  72 /* Local Function Prototypes */
  73 static int ixgb_init_module(void);
  74 static void ixgb_exit_module(void);
  75 static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
  76 static void ixgb_remove(struct pci_dev *pdev);
  77 static int ixgb_sw_init(struct ixgb_adapter *adapter);
  78 static int ixgb_open(struct net_device *netdev);
  79 static int ixgb_close(struct net_device *netdev);
  80 static void ixgb_configure_tx(struct ixgb_adapter *adapter);
  81 static void ixgb_configure_rx(struct ixgb_adapter *adapter);
  82 static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
  83 static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
  84 static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
  85 static void ixgb_set_multi(struct net_device *netdev);
  86 static void ixgb_watchdog(unsigned long data);
  87 static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
  88                                    struct net_device *netdev);
  89 static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
  90 static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
  91 static int ixgb_set_mac(struct net_device *netdev, void *p);
  92 static irqreturn_t ixgb_intr(int irq, void *data);
  93 static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);
  94
  95 static int ixgb_clean(struct napi_struct *, int);
  96 static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
  97 static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);
  98
  99 static void ixgb_tx_timeout(struct net_device *dev);
 100 static void ixgb_tx_timeout_task(struct work_struct *work);
 101
 102 static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter);
 103 static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter);
 104 static int ixgb_vlan_rx_add_vid(struct net_device *netdev,
 105                                 __be16 proto, u16 vid);
 106 static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
 107                                  __be16 proto, u16 vid);
 108 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
 109
 110 #ifdef CONFIG_NET_POLL_CONTROLLER
 111 /* for netdump / net console */
 112 static void ixgb_netpoll(struct net_device *dev);
 113 #endif
 114
 115 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
 116                              enum pci_channel_state state);
 117 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
 118 static void ixgb_io_resume (struct pci_dev *pdev);
 119
 120 static const struct pci_error_handlers ixgb_err_handler = {
 121         .error_detected = ixgb_io_error_detected,
 122         .slot_reset = ixgb_io_slot_reset,
 123         .resume = ixgb_io_resume,
 124 };
 125
 126 static struct pci_driver ixgb_driver = {
 127         .name     = ixgb_driver_name,
 128         .id_table = ixgb_pci_tbl,
 129         .probe    = ixgb_probe,
 130         .remove   = ixgb_remove,
 131         .err_handler = &ixgb_err_handler
 132 };
 133
 134 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 135 MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
 136 MODULE_LICENSE("GPL");
 137 MODULE_VERSION(DRV_VERSION);
 138
 139 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
 140 static int debug = -1;
 141 module_param(debug, int, 0);
 142 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 143
 144 /**
 145  * ixgb_init_module - Driver Registration Routine
 146  *
 147  * ixgb_init_module is the first routine called when the driver is
 148  * loaded. All it does is register with the PCI subsystem.
 149  **/
 150
 151 static int __init
 152 ixgb_init_module(void)
 153 {
 154         pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
 155         pr_info("%s\n", ixgb_copyright);
 156
 157         return pci_register_driver(&ixgb_driver);
 158 }
 159
 160 module_init(ixgb_init_module);
 161
 162 /**
 163  * ixgb_exit_module - Driver Exit Cleanup Routine
 164  *
 165  * ixgb_exit_module is called just before the driver is removed
 166  * from memory.
 167  **/
 168
 169 static void __exit
 170 ixgb_exit_module(void)
 171 {
 172         pci_unregister_driver(&ixgb_driver);
 173 }
 174
 175 module_exit(ixgb_exit_module);
 176
 177 /**
 178  * ixgb_irq_disable - Mask off interrupt generation on the NIC
 179  * @adapter: board private structure
 180  **/
 181
 182 static void
 183 ixgb_irq_disable(struct ixgb_adapter *adapter)
 184 {
 185         IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
 186         IXGB_WRITE_FLUSH(&adapter->hw);
 187         synchronize_irq(adapter->pdev->irq);
 188 }
 189
 190 /**
 191  * ixgb_irq_enable - Enable default interrupt generation settings
 192  * @adapter: board private structure
 193  **/
 194
 195 static void
 196 ixgb_irq_enable(struct ixgb_adapter *adapter)
 197 {
 198         u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
 199                   IXGB_INT_TXDW | IXGB_INT_LSC;
 200         if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN)
 201                 val |= IXGB_INT_GPI0;
 202         IXGB_WRITE_REG(&adapter->hw, IMS, val);
 203         IXGB_WRITE_FLUSH(&adapter->hw);
 204 }
 205
 206 int
 207 ixgb_up(struct ixgb_adapter *adapter)
 208 {
 209         struct net_device *netdev = adapter->netdev;
 210         int err, irq_flags = IRQF_SHARED;
 211         int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 212         struct ixgb_hw *hw = &adapter->hw;
 213
 214         /* hardware has been reset, we need to reload some things */
 215
 216         ixgb_rar_set(hw, netdev->dev_addr, 0);
 217         ixgb_set_multi(netdev);
 218
 219         ixgb_restore_vlan(adapter);
 220
 221         ixgb_configure_tx(adapter);
 222         ixgb_setup_rctl(adapter);
 223         ixgb_configure_rx(adapter);
 224         ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));
 225
 226         /* disable interrupts and get the hardware into a known state */
 227         IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
 228
 229         /* only enable MSI if bus is in PCI-X mode */
 230         if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
 231                 err = pci_enable_msi(adapter->pdev);
 232                 if (!err) {
 233                         adapter->have_msi = true;
 234                         irq_flags = 0;
 235                 }
 236                 /* proceed to try to request regular interrupt */
 237         }
 238
 239         err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
 240                           netdev->name, netdev);
 241         if (err) {
 242                 if (adapter->have_msi)
 243                         pci_disable_msi(adapter->pdev);
 244                 netif_err(adapter, probe, adapter->netdev,
 245                           "Unable to allocate interrupt Error: %d\n", err);
 246                 return err;
 247         }
 248
 249         if ((hw->max_frame_size != max_frame) ||
 250                 (hw->max_frame_size !=
 251                 (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {
 252
 253                 hw->max_frame_size = max_frame;
 254
 255                 IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
 256
 257                 if (hw->max_frame_size >
 258                    IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
 259                         u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
 260
 261                         if (!(ctrl0 & IXGB_CTRL0_JFE)) {
 262                                 ctrl0 |= IXGB_CTRL0_JFE;
 263                                 IXGB_WRITE_REG(hw, CTRL0, ctrl0);
 264                         }
 265                 }
 266         }
 267
 268         clear_bit(__IXGB_DOWN, &adapter->flags);
 269
 270         napi_enable(&adapter->napi);
 271         ixgb_irq_enable(adapter);
 272
 273         netif_wake_queue(netdev);
 274
 275         mod_timer(&adapter->watchdog_timer, jiffies);
 276
 277         return 0;
 278 }
 279
 280 void
 281 ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
 282 {
 283         struct net_device *netdev = adapter->netdev;
 284
 285         /* prevent the interrupt handler from restarting watchdog */
 286         set_bit(__IXGB_DOWN, &adapter->flags);
 287
 288         napi_disable(&adapter->napi);
 289         /* waiting for NAPI to complete can re-enable interrupts */
 290         ixgb_irq_disable(adapter);
 291         free_irq(adapter->pdev->irq, netdev);
 292
 293         if (adapter->have_msi)
 294                 pci_disable_msi(adapter->pdev);
 295
 296         if (kill_watchdog)
 297                 del_timer_sync(&adapter->watchdog_timer);
 298
 299         adapter->link_speed = 0;
 300         adapter->link_duplex = 0;
 301         netif_carrier_off(netdev);
 302         netif_stop_queue(netdev);
 303
 304         ixgb_reset(adapter);
 305         ixgb_clean_tx_ring(adapter);
 306         ixgb_clean_rx_ring(adapter);
 307 }
 308
 309 void
 310 ixgb_reset(struct ixgb_adapter *adapter)
 311 {
 312         struct ixgb_hw *hw = &adapter->hw;
 313
 314         ixgb_adapter_stop(hw);
 315         if (!ixgb_init_hw(hw))
 316                 netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");
 317
 318         /* restore frame size information */
 319         IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
 320         if (hw->max_frame_size >
 321             IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
 322                 u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
 323                 if (!(ctrl0 & IXGB_CTRL0_JFE)) {
 324                         ctrl0 |= IXGB_CTRL0_JFE;
 325                         IXGB_WRITE_REG(hw, CTRL0, ctrl0);
 326                 }
 327         }
 328 }
 329
 330 static netdev_features_t
 331 ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
 332 {
 333         /*
 334          * Tx VLAN insertion does not work per HW design when Rx stripping is
 335          * disabled.
 336          */
 337         if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
 338                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 339
 340         return features;
 341 }
 342
 343 static int
 344 ixgb_set_features(struct net_device *netdev, netdev_features_t features)
 345 {
 346         struct ixgb_adapter *adapter = netdev_priv(netdev);
 347         netdev_features_t changed = features ^ netdev->features;
 348
 349         if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX)))
 350                 return 0;
 351
 352         adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
 353
 354         if (netif_running(netdev)) {
 355                 ixgb_down(adapter, true);
 356                 ixgb_up(adapter);
 357                 ixgb_set_speed_duplex(netdev);
 358         } else
 359                 ixgb_reset(adapter);
 360
 361         return 0;
 362 }
 363
 364
 365 static const struct net_device_ops ixgb_netdev_ops = {
 366         .ndo_open               = ixgb_open,
 367         .ndo_stop               = ixgb_close,
 368         .ndo_start_xmit         = ixgb_xmit_frame,
 369         .ndo_get_stats          = ixgb_get_stats,
 370         .ndo_set_rx_mode        = ixgb_set_multi,
 371         .ndo_validate_addr      = eth_validate_addr,
 372         .ndo_set_mac_address    = ixgb_set_mac,
 373         .ndo_change_mtu         = ixgb_change_mtu,
 374         .ndo_tx_timeout         = ixgb_tx_timeout,
 375         .ndo_vlan_rx_add_vid    = ixgb_vlan_rx_add_vid,
 376         .ndo_vlan_rx_kill_vid   = ixgb_vlan_rx_kill_vid,
 377 #ifdef CONFIG_NET_POLL_CONTROLLER
 378         .ndo_poll_controller    = ixgb_netpoll,
 379 #endif
 380         .ndo_fix_features       = ixgb_fix_features,
 381         .ndo_set_features       = ixgb_set_features,
 382 };
 383
 384 /**
 385  * ixgb_probe - Device Initialization Routine
 386  * @pdev: PCI device information struct
 387  * @ent: entry in ixgb_pci_tbl
 388  *
 389  * Returns 0 on success, negative on failure
 390  *
 391  * ixgb_probe initializes an adapter identified by a pci_dev structure.
 392  * The OS initialization, configuring of the adapter private structure,
 393  * and a hardware reset occur.
 394  **/
 395
 396 static int
 397 ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 398 {
 399         struct net_device *netdev = NULL;
 400         struct ixgb_adapter *adapter;
 401         static int cards_found = 0;
 402         int pci_using_dac;
 403         int i;
 404         int err;
 405
 406         err = pci_enable_device(pdev);
 407         if (err)
 408                 return err;
 409
 410         pci_using_dac = 0;
 411         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
 412         if (!err) {
 413                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
 414                 if (!err)
 415                         pci_using_dac = 1;
 416         } else {
 417                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 418                 if (err) {
 419                         err = dma_set_coherent_mask(&pdev->dev,
 420                                                     DMA_BIT_MASK(32));
 421                         if (err) {
 422                                 pr_err("No usable DMA configuration, aborting\n");
 423                                 goto err_dma_mask;
 424                         }
 425                 }
 426         }
 427
 428         err = pci_request_regions(pdev, ixgb_driver_name);
 429         if (err)
 430                 goto err_request_regions;
 431
 432         pci_set_master(pdev);
 433
 434         netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
 435         if (!netdev) {
 436                 err = -ENOMEM;
 437                 goto err_alloc_etherdev;
 438         }
 439
 440         SET_NETDEV_DEV(netdev, &pdev->dev);
 441
 442         pci_set_drvdata(pdev, netdev);
 443         adapter = netdev_priv(netdev);
 444         adapter->netdev = netdev;
 445         adapter->pdev = pdev;
 446         adapter->hw.back = adapter;
 447         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
 448
 449         adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
 450         if (!adapter->hw.hw_addr) {
 451                 err = -EIO;
 452                 goto err_ioremap;
 453         }
 454
 455         for (i = BAR_1; i <= BAR_5; i++) {
 456                 if (pci_resource_len(pdev, i) == 0)
 457                         continue;
 458                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 459                         adapter->hw.io_base = pci_resource_start(pdev, i);
 460                         break;
 461                 }
 462         }
 463
 464         netdev->netdev_ops = &ixgb_netdev_ops;
 465         ixgb_set_ethtool_ops(netdev);
 466         netdev->watchdog_timeo = 5 * HZ;
 467         netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);
 468
 469         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 470
 471         adapter->bd_number = cards_found;
 472         adapter->link_speed = 0;
 473         adapter->link_duplex = 0;
 474
 475         /* setup the private structure */
 476
 477         err = ixgb_sw_init(adapter);
 478         if (err)
 479                 goto err_sw_init;
 480
 481         netdev->hw_features = NETIF_F_SG |
 482                            NETIF_F_TSO |
 483                            NETIF_F_HW_CSUM |
 484                            NETIF_F_HW_VLAN_CTAG_TX |
 485                            NETIF_F_HW_VLAN_CTAG_RX;
 486         netdev->features = netdev->hw_features |
 487                            NETIF_F_HW_VLAN_CTAG_FILTER;
 488         netdev->hw_features |= NETIF_F_RXCSUM;
 489
 490         if (pci_using_dac) {
 491                 netdev->features |= NETIF_F_HIGHDMA;
 492                 netdev->vlan_features |= NETIF_F_HIGHDMA;
 493         }
 494
 495         /* make sure the EEPROM is good */
 496
 497         if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
 498                 netif_err(adapter, probe, adapter->netdev,
 499                           "The EEPROM Checksum Is Not Valid\n");
 500                 err = -EIO;
 501                 goto err_eeprom;
 502         }
 503
 504         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
 505
 506         if (!is_valid_ether_addr(netdev->dev_addr)) {
 507                 netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
 508                 err = -EIO;
 509                 goto err_eeprom;
 510         }
 511
 512         adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);
 513
 514         init_timer(&adapter->watchdog_timer);
 515         adapter->watchdog_timer.function = ixgb_watchdog;
 516         adapter->watchdog_timer.data = (unsigned long)adapter;
 517
 518         INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);
 519
 520         strcpy(netdev->name, "eth%d");
 521         err = register_netdev(netdev);
 522         if (err)
 523                 goto err_register;
 524
 525         /* carrier off reporting is important to ethtool even BEFORE open */
 526         netif_carrier_off(netdev);
 527
 528         netif_info(adapter, probe, adapter->netdev,
 529                    "Intel(R) PRO/10GbE Network Connection\n");
 530         ixgb_check_options(adapter);
 531         /* reset the hardware with the new settings */
 532
 533         ixgb_reset(adapter);
 534
 535         cards_found++;
 536         return 0;
 537
 538 err_register:
 539 err_sw_init:
 540 err_eeprom:
 541         iounmap(adapter->hw.hw_addr);
 542 err_ioremap:
 543         free_netdev(netdev);
 544 err_alloc_etherdev:
 545         pci_release_regions(pdev);
 546 err_request_regions:
 547 err_dma_mask:
 548         pci_disable_device(pdev);
 549         return err;
 550 }
 551
 552 /**
 553  * ixgb_remove - Device Removal Routine
 554  * @pdev: PCI device information struct
 555  *
 556  * ixgb_remove is called by the PCI subsystem to alert the driver
 557  * that it should release a PCI device.  The could be caused by a
 558  * Hot-Plug event, or because the driver is going to be removed from
 559  * memory.
 560  **/
 561
 562 static void
 563 ixgb_remove(struct pci_dev *pdev)
 564 {
 565         struct net_device *netdev = pci_get_drvdata(pdev);
 566         struct ixgb_adapter *adapter = netdev_priv(netdev);
 567
 568         cancel_work_sync(&adapter->tx_timeout_task);
 569
 570         unregister_netdev(netdev);
 571
 572         iounmap(adapter->hw.hw_addr);
 573         pci_release_regions(pdev);
 574
 575         free_netdev(netdev);
 576         pci_disable_device(pdev);
 577 }
 578
 579 /**
 580  * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
 581  * @adapter: board private structure to initialize
 582  *
 583  * ixgb_sw_init initializes the Adapter private data structure.
 584  * Fields are initialized based on PCI device information and
 585  * OS network device settings (MTU size).
 586  **/
 587
 588 static int
 589 ixgb_sw_init(struct ixgb_adapter *adapter)
 590 {
 591         struct ixgb_hw *hw = &adapter->hw;
 592         struct net_device *netdev = adapter->netdev;
 593         struct pci_dev *pdev = adapter->pdev;
 594
 595         /* PCI config space info */
 596
 597         hw->vendor_id = pdev->vendor;
 598         hw->device_id = pdev->device;
 599         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 600         hw->subsystem_id = pdev->subsystem_device;
 601
 602         hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
 603         adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */
 604
 605         if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
 606             (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
 607             (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
 608             (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
 609                 hw->mac_type = ixgb_82597;
 610         else {
 611                 /* should never have loaded on this device */
 612                 netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
 613         }
 614
 615         /* enable flow control to be programmed */
 616         hw->fc.send_xon = 1;
 617
 618         set_bit(__IXGB_DOWN, &adapter->flags);
 619         return 0;
 620 }
 621
 622 /**
 623  * ixgb_open - Called when a network interface is made active
 624  * @netdev: network interface device structure
 625  *
 626  * Returns 0 on success, negative value on failure
 627  *
 628  * The open entry point is called when a network interface is made
 629  * active by the system (IFF_UP).  At this point all resources needed
 630  * for transmit and receive operations are allocated, the interrupt
 631  * handler is registered with the OS, the watchdog timer is started,
 632  * and the stack is notified that the interface is ready.
 633  **/
 634
 635 static int
 636 ixgb_open(struct net_device *netdev)
 637 {
 638         struct ixgb_adapter *adapter = netdev_priv(netdev);
 639         int err;
 640
 641         /* allocate transmit descriptors */
 642         err = ixgb_setup_tx_resources(adapter);
 643         if (err)
 644                 goto err_setup_tx;
 645
 646         netif_carrier_off(netdev);
 647
 648         /* allocate receive descriptors */
 649
 650         err = ixgb_setup_rx_resources(adapter);
 651         if (err)
 652                 goto err_setup_rx;
 653
 654         err = ixgb_up(adapter);
 655         if (err)
 656                 goto err_up;
 657
 658         netif_start_queue(netdev);
 659
 660         return 0;
 661
 662 err_up:
 663         ixgb_free_rx_resources(adapter);
 664 err_setup_rx:
 665         ixgb_free_tx_resources(adapter);
 666 err_setup_tx:
 667         ixgb_reset(adapter);
 668
 669         return err;
 670 }
 671
 672 /**
 673  * ixgb_close - Disables a network interface
 674  * @netdev: network interface device structure
 675  *
 676  * Returns 0, this is not allowed to fail
 677  *
 678  * The close entry point is called when an interface is de-activated
 679  * by the OS.  The hardware is still under the drivers control, but
 680  * needs to be disabled.  A global MAC reset is issued to stop the
 681  * hardware, and all transmit and receive resources are freed.
 682  **/
 683
 684 static int
 685 ixgb_close(struct net_device *netdev)
 686 {
 687         struct ixgb_adapter *adapter = netdev_priv(netdev);
 688
 689         ixgb_down(adapter, true);
 690
 691         ixgb_free_tx_resources(adapter);
 692         ixgb_free_rx_resources(adapter);
 693
 694         return 0;
 695 }
 696
 697 /**
 698  * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
 699  * @adapter: board private structure
 700  *
 701  * Return 0 on success, negative on failure
 702  **/
 703
 704 int
 705 ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
 706 {
 707         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
 708         struct pci_dev *pdev = adapter->pdev;
 709         int size;
 710
 711         size = sizeof(struct ixgb_buffer) * txdr->count;
 712         txdr->buffer_info = vzalloc(size);
 713         if (!txdr->buffer_info)
 714                 return -ENOMEM;
 715
 716         /* round up to nearest 4K */
 717
 718         txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
 719         txdr->size = ALIGN(txdr->size, 4096);
 720
 721         txdr->desc = dma_zalloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
 722                                          GFP_KERNEL);
 723         if (!txdr->desc) {
 724                 vfree(txdr->buffer_info);
 725                 return -ENOMEM;
 726         }
 727
 728         txdr->next_to_use = 0;
 729         txdr->next_to_clean = 0;
 730
 731         return 0;
 732 }
 733
 734 /**
 735  * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
 736  * @adapter: board private structure
 737  *
 738  * Configure the Tx unit of the MAC after a reset.
 739  **/
 740
 741 static void
 742 ixgb_configure_tx(struct ixgb_adapter *adapter)
 743 {
 744         u64 tdba = adapter->tx_ring.dma;
 745         u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
 746         u32 tctl;
 747         struct ixgb_hw *hw = &adapter->hw;
 748
 749         /* Setup the Base and Length of the Tx Descriptor Ring
 750          * tx_ring.dma can be either a 32 or 64 bit value
 751          */
 752
 753         IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
 754         IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));
 755
 756         IXGB_WRITE_REG(hw, TDLEN, tdlen);
 757
 758         /* Setup the HW Tx Head and Tail descriptor pointers */
 759
 760         IXGB_WRITE_REG(hw, TDH, 0);
 761         IXGB_WRITE_REG(hw, TDT, 0);
 762
 763         /* don't set up txdctl, it induces performance problems if configured
 764          * incorrectly */
 765         /* Set the Tx Interrupt Delay register */
 766
 767         IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
 768
 769         /* Program the Transmit Control Register */
 770
 771         tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
 772         IXGB_WRITE_REG(hw, TCTL, tctl);
 773
 774         /* Setup Transmit Descriptor Settings for this adapter */
 775         adapter->tx_cmd_type =
 776                 IXGB_TX_DESC_TYPE |
 777                 (adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
 778 }
 779
 780 /**
 781  * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
 782  * @adapter: board private structure
 783  *
 784  * Returns 0 on success, negative on failure
 785  **/
 786
 787 int
 788 ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
 789 {
 790         struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
 791         struct pci_dev *pdev = adapter->pdev;
 792         int size;
 793
 794         size = sizeof(struct ixgb_buffer) * rxdr->count;
 795         rxdr->buffer_info = vzalloc(size);
 796         if (!rxdr->buffer_info)
 797                 return -ENOMEM;
 798
 799         /* Round up to nearest 4K */
 800
 801         rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
 802         rxdr->size = ALIGN(rxdr->size, 4096);
 803
 804         rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
 805                                         GFP_KERNEL);
 806
 807         if (!rxdr->desc) {
 808                 vfree(rxdr->buffer_info);
 809                 return -ENOMEM;
 810         }
 811         memset(rxdr->desc, 0, rxdr->size);
 812
 813         rxdr->next_to_clean = 0;
 814         rxdr->next_to_use = 0;
 815
 816         return 0;
 817 }
 818
 819 /**
 820  * ixgb_setup_rctl - configure the receive control register
 821  * @adapter: Board private structure
 822  **/
 823
 824 static void
 825 ixgb_setup_rctl(struct ixgb_adapter *adapter)
 826 {
 827         u32 rctl;
 828
 829         rctl = IXGB_READ_REG(&adapter->hw, RCTL);
 830
 831         rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);
 832
 833         rctl |=
 834                 IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
 835                 IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
 836                 (adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);
 837
 838         rctl |= IXGB_RCTL_SECRC;
 839
 840         if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
 841                 rctl |= IXGB_RCTL_BSIZE_2048;
 842         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
 843                 rctl |= IXGB_RCTL_BSIZE_4096;
 844         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
 845                 rctl |= IXGB_RCTL_BSIZE_8192;
 846         else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
 847                 rctl |= IXGB_RCTL_BSIZE_16384;
 848
 849         IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
 850 }
 851
 852 /**
 853  * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
 854  * @adapter: board private structure
 855  *
 856  * Configure the Rx unit of the MAC after a reset.
 857  **/
 858
 859 static void
 860 ixgb_configure_rx(struct ixgb_adapter *adapter)
 861 {
 862         u64 rdba = adapter->rx_ring.dma;
 863         u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
 864         struct ixgb_hw *hw = &adapter->hw;
 865         u32 rctl;
 866         u32 rxcsum;
 867
 868         /* make sure receives are disabled while setting up the descriptors */
 869
 870         rctl = IXGB_READ_REG(hw, RCTL);
 871         IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);
 872
 873         /* set the Receive Delay Timer Register */
 874
 875         IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
 876
 877         /* Setup the Base and Length of the Rx Descriptor Ring */
 878
 879         IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
 880         IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));
 881
 882         IXGB_WRITE_REG(hw, RDLEN, rdlen);
 883
 884         /* Setup the HW Rx Head and Tail Descriptor Pointers */
 885         IXGB_WRITE_REG(hw, RDH, 0);
 886         IXGB_WRITE_REG(hw, RDT, 0);
 887
 888         /* due to the hardware errata with RXDCTL, we are unable to use any of
 889          * the performance enhancing features of it without causing other
 890          * subtle bugs, some of the bugs could include receive length
 891          * corruption at high data rates (WTHRESH > 0) and/or receive
 892          * descriptor ring irregularites (particularly in hardware cache) */
 893         IXGB_WRITE_REG(hw, RXDCTL, 0);
 894
 895         /* Enable Receive Checksum Offload for TCP and UDP */
 896         if (adapter->rx_csum) {
 897                 rxcsum = IXGB_READ_REG(hw, RXCSUM);
 898                 rxcsum |= IXGB_RXCSUM_TUOFL;
 899                 IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
 900         }
 901
 902         /* Enable Receives */
 903
 904         IXGB_WRITE_REG(hw, RCTL, rctl);
 905 }
 906
 907 /**
 908  * ixgb_free_tx_resources - Free Tx Resources
 909  * @adapter: board private structure
 910  *
 911  * Free all transmit software resources
 912  **/
 913
 914 void
 915 ixgb_free_tx_resources(struct ixgb_adapter *adapter)
 916 {
 917         struct pci_dev *pdev = adapter->pdev;
 918
 919         ixgb_clean_tx_ring(adapter);
 920
 921         vfree(adapter->tx_ring.buffer_info);
 922         adapter->tx_ring.buffer_info = NULL;
 923
 924         dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
 925                           adapter->tx_ring.desc, adapter->tx_ring.dma);
 926
 927         adapter->tx_ring.desc = NULL;
 928 }
 929
 930 static void
 931 ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
 932                                 struct ixgb_buffer *buffer_info)
 933 {
 934         if (buffer_info->dma) {
 935                 if (buffer_info->mapped_as_page)
 936                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
 937                                        buffer_info->length, DMA_TO_DEVICE);
 938                 else
 939                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
 940                                          buffer_info->length, DMA_TO_DEVICE);
 941                 buffer_info->dma = 0;
 942         }
 943
 944         if (buffer_info->skb) {
 945                 dev_kfree_skb_any(buffer_info->skb);
 946                 buffer_info->skb = NULL;
 947         }
 948         buffer_info->time_stamp = 0;
 949         /* these fields must always be initialized in tx
 950          * buffer_info->length = 0;
 951          * buffer_info->next_to_watch = 0; */
 952 }
 953
 954 /**
 955  * ixgb_clean_tx_ring - Free Tx Buffers
 956  * @adapter: board private structure
 957  **/
 958
 959 static void
 960 ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
 961 {
 962         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
 963         struct ixgb_buffer *buffer_info;
 964         unsigned long size;
 965         unsigned int i;
 966
 967         /* Free all the Tx ring sk_buffs */
 968
 969         for (i = 0; i < tx_ring->count; i++) {
 970                 buffer_info = &tx_ring->buffer_info[i];
 971                 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
 972         }
 973
 974         size = sizeof(struct ixgb_buffer) * tx_ring->count;
 975         memset(tx_ring->buffer_info, 0, size);
 976
 977         /* Zero out the descriptor ring */
 978
 979         memset(tx_ring->desc, 0, tx_ring->size);
 980
 981         tx_ring->next_to_use = 0;
 982         tx_ring->next_to_clean = 0;
 983
 984         IXGB_WRITE_REG(&adapter->hw, TDH, 0);
 985         IXGB_WRITE_REG(&adapter->hw, TDT, 0);
 986 }
 987
 988 /**
 989  * ixgb_free_rx_resources - Free Rx Resources
 990  * @adapter: board private structure
 991  *
 992  * Free all receive software resources
 993  **/
 994
 995 void
 996 ixgb_free_rx_resources(struct ixgb_adapter *adapter)
 997 {
 998         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
 999         struct pci_dev *pdev = adapter->pdev;
1000
1001         ixgb_clean_rx_ring(adapter);
1002
1003         vfree(rx_ring->buffer_info);
1004         rx_ring->buffer_info = NULL;
1005
1006         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1007                           rx_ring->dma);
1008
1009         rx_ring->desc = NULL;
1010 }
1011
1012 /**
1013  * ixgb_clean_rx_ring - Free Rx Buffers
1014  * @adapter: board private structure
1015  **/
1016
1017 static void
1018 ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
1019 {
1020         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
1021         struct ixgb_buffer *buffer_info;
1022         struct pci_dev *pdev = adapter->pdev;
1023         unsigned long size;
1024         unsigned int i;
1025
1026         /* Free all the Rx ring sk_buffs */
1027
1028         for (i = 0; i < rx_ring->count; i++) {
1029                 buffer_info = &rx_ring->buffer_info[i];
1030                 if (buffer_info->dma) {
1031                         dma_unmap_single(&pdev->dev,
1032                                          buffer_info->dma,
1033                                          buffer_info->length,
1034                                          DMA_FROM_DEVICE);
1035                         buffer_info->dma = 0;
1036                         buffer_info->length = 0;
1037                 }
1038
1039                 if (buffer_info->skb) {
1040                         dev_kfree_skb(buffer_info->skb);
1041                         buffer_info->skb = NULL;
1042                 }
1043         }
1044
1045         size = sizeof(struct ixgb_buffer) * rx_ring->count;
1046         memset(rx_ring->buffer_info, 0, size);
1047
1048         /* Zero out the descriptor ring */
1049
1050         memset(rx_ring->desc, 0, rx_ring->size);
1051
1052         rx_ring->next_to_clean = 0;
1053         rx_ring->next_to_use = 0;
1054
1055         IXGB_WRITE_REG(&adapter->hw, RDH, 0);
1056         IXGB_WRITE_REG(&adapter->hw, RDT, 0);
1057 }
1058
1059 /**
1060  * ixgb_set_mac - Change the Ethernet Address of the NIC
1061  * @netdev: network interface device structure
1062  * @p: pointer to an address structure
1063  *
1064  * Returns 0 on success, negative on failure
1065  **/
1066
1067 static int
1068 ixgb_set_mac(struct net_device *netdev, void *p)
1069 {
1070         struct ixgb_adapter *adapter = netdev_priv(netdev);
1071         struct sockaddr *addr = p;
1072
1073         if (!is_valid_ether_addr(addr->sa_data))
1074                 return -EADDRNOTAVAIL;
1075
1076         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1077
1078         ixgb_rar_set(&adapter->hw, addr->sa_data, 0);
1079
1080         return 0;
1081 }
1082
1083 /**
1084  * ixgb_set_multi - Multicast and Promiscuous mode set
1085  * @netdev: network interface device structure
1086  *
1087  * The set_multi entry point is called whenever the multicast address
1088  * list or the network interface flags are updated.  This routine is
1089  * responsible for configuring the hardware for proper multicast,
1090  * promiscuous mode, and all-multi behavior.
1091  **/
1092
1093 static void
1094 ixgb_set_multi(struct net_device *netdev)
1095 {
1096         struct ixgb_adapter *adapter = netdev_priv(netdev);
1097         struct ixgb_hw *hw = &adapter->hw;
1098         struct netdev_hw_addr *ha;
1099         u32 rctl;
1100
1101         /* Check for Promiscuous and All Multicast modes */
1102
1103         rctl = IXGB_READ_REG(hw, RCTL);
1104
1105         if (netdev->flags & IFF_PROMISC) {
1106                 rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1107                 /* disable VLAN filtering */
1108                 rctl &= ~IXGB_RCTL_CFIEN;
1109                 rctl &= ~IXGB_RCTL_VFE;
1110         } else {
1111                 if (netdev->flags & IFF_ALLMULTI) {
1112                         rctl |= IXGB_RCTL_MPE;
1113                         rctl &= ~IXGB_RCTL_UPE;
1114                 } else {
1115                         rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
1116                 }
1117                 /* enable VLAN filtering */
1118                 rctl |= IXGB_RCTL_VFE;
1119                 rctl &= ~IXGB_RCTL_CFIEN;
1120         }
1121
1122         if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
1123                 rctl |= IXGB_RCTL_MPE;
1124                 IXGB_WRITE_REG(hw, RCTL, rctl);
1125         } else {
1126                 u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES *
1127                               ETH_ALEN, GFP_ATOMIC);
1128                 u8 *addr;
1129                 if (!mta)
1130                         goto alloc_failed;
1131
1132                 IXGB_WRITE_REG(hw, RCTL, rctl);
1133
1134                 addr = mta;
1135                 netdev_for_each_mc_addr(ha, netdev) {
1136                         memcpy(addr, ha->addr, ETH_ALEN);
1137                         addr += ETH_ALEN;
1138                 }
1139
1140                 ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
1141                 kfree(mta);
1142         }
1143
1144 alloc_failed:
1145         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
1146                 ixgb_vlan_strip_enable(adapter);
1147         else
1148                 ixgb_vlan_strip_disable(adapter);
1149
1150 }
1151
1152 /**
1153  * ixgb_watchdog - Timer Call-back
1154  * @data: pointer to netdev cast into an unsigned long
1155  **/
1156
1157 static void
1158 ixgb_watchdog(unsigned long data)
1159 {
1160         struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
1161         struct net_device *netdev = adapter->netdev;
1162         struct ixgb_desc_ring *txdr = &adapter->tx_ring;
1163
1164         ixgb_check_for_link(&adapter->hw);
1165
1166         if (ixgb_check_for_bad_link(&adapter->hw)) {
1167                 /* force the reset path */
1168                 netif_stop_queue(netdev);
1169         }
1170
1171         if (adapter->hw.link_up) {
1172                 if (!netif_carrier_ok(netdev)) {
1173                         netdev_info(netdev,
1174                                     "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
1175                                     (adapter->hw.fc.type == ixgb_fc_full) ?
1176                                     "RX/TX" :
1177                                     (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
1178                                      "RX" :
1179                                     (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
1180                                     "TX" : "None");
1181                         adapter->link_speed = 10000;
1182                         adapter->link_duplex = FULL_DUPLEX;
1183                         netif_carrier_on(netdev);
1184                 }
1185         } else {
1186                 if (netif_carrier_ok(netdev)) {
1187                         adapter->link_speed = 0;
1188                         adapter->link_duplex = 0;
1189                         netdev_info(netdev, "NIC Link is Down\n");
1190                         netif_carrier_off(netdev);
1191                 }
1192         }
1193
1194         ixgb_update_stats(adapter);
1195
1196         if (!netif_carrier_ok(netdev)) {
1197                 if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
1198                         /* We've lost link, so the controller stops DMA,
1199                          * but we've got queued Tx work that's never going
1200                          * to get done, so reset controller to flush Tx.
1201                          * (Do the reset outside of interrupt context). */
1202                         schedule_work(&adapter->tx_timeout_task);
1203                         /* return immediately since reset is imminent */
1204                         return;
1205                 }
1206         }
1207
1208         /* Force detection of hung controller every watchdog period */
1209         adapter->detect_tx_hung = true;
1210
1211         /* generate an interrupt to force clean up of any stragglers */
1212         IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);
1213
1214         /* Reset the timer */
1215         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1216 }
1217
1218 #define IXGB_TX_FLAGS_CSUM              0x00000001
1219 #define IXGB_TX_FLAGS_VLAN              0x00000002
1220 #define IXGB_TX_FLAGS_TSO               0x00000004
1221
1222 static int
1223 ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
1224 {
1225         struct ixgb_context_desc *context_desc;
1226         unsigned int i;
1227         u8 ipcss, ipcso, tucss, tucso, hdr_len;
1228         u16 ipcse, tucse, mss;
1229         int err;
1230
1231         if (likely(skb_is_gso(skb))) {
1232                 struct ixgb_buffer *buffer_info;
1233                 struct iphdr *iph;
1234
1235                 if (skb_header_cloned(skb)) {
1236                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1237                         if (err)
1238                                 return err;
1239                 }
1240
1241                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1242                 mss = skb_shinfo(skb)->gso_size;
1243                 iph = ip_hdr(skb);
1244                 iph->tot_len = 0;
1245                 iph->check = 0;
1246                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1247                                                          iph->daddr, 0,
1248                                                          IPPROTO_TCP, 0);
1249                 ipcss = skb_network_offset(skb);
1250                 ipcso = (void *)&(iph->check) - (void *)skb->data;
1251                 ipcse = skb_transport_offset(skb) - 1;
1252                 tucss = skb_transport_offset(skb);
1253                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
1254                 tucse = 0;
1255
1256                 i = adapter->tx_ring.next_to_use;
1257                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1258                 buffer_info = &adapter->tx_ring.buffer_info[i];
1259                 WARN_ON(buffer_info->dma != 0);
1260
1261                 context_desc->ipcss = ipcss;
1262                 context_desc->ipcso = ipcso;
1263                 context_desc->ipcse = cpu_to_le16(ipcse);
1264                 context_desc->tucss = tucss;
1265                 context_desc->tucso = tucso;
1266                 context_desc->tucse = cpu_to_le16(tucse);
1267                 context_desc->mss = cpu_to_le16(mss);
1268                 context_desc->hdr_len = hdr_len;
1269                 context_desc->status = 0;
1270                 context_desc->cmd_type_len = cpu_to_le32(
1271                                                   IXGB_CONTEXT_DESC_TYPE
1272                                                 | IXGB_CONTEXT_DESC_CMD_TSE
1273                                                 | IXGB_CONTEXT_DESC_CMD_IP
1274                                                 | IXGB_CONTEXT_DESC_CMD_TCP
1275                                                 | IXGB_CONTEXT_DESC_CMD_IDE
1276                                                 | (skb->len - (hdr_len)));
1277
1278
1279                 if (++i == adapter->tx_ring.count) i = 0;
1280                 adapter->tx_ring.next_to_use = i;
1281
1282                 return 1;
1283         }
1284
1285         return 0;
1286 }
1287
1288 static bool
1289 ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
1290 {
1291         struct ixgb_context_desc *context_desc;
1292         unsigned int i;
1293         u8 css, cso;
1294
1295         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1296                 struct ixgb_buffer *buffer_info;
1297                 css = skb_checksum_start_offset(skb);
1298                 cso = css + skb->csum_offset;
1299
1300                 i = adapter->tx_ring.next_to_use;
1301                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
1302                 buffer_info = &adapter->tx_ring.buffer_info[i];
1303                 WARN_ON(buffer_info->dma != 0);
1304
1305                 context_desc->tucss = css;
1306                 context_desc->tucso = cso;
1307                 context_desc->tucse = 0;
1308                 /* zero out any previously existing data in one instruction */
1309                 *(u32 *)&(context_desc->ipcss) = 0;
1310                 context_desc->status = 0;
1311                 context_desc->hdr_len = 0;
1312                 context_desc->mss = 0;
1313                 context_desc->cmd_type_len =
1314                         cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
1315                                     | IXGB_TX_DESC_CMD_IDE);
1316
1317                 if (++i == adapter->tx_ring.count) i = 0;
1318                 adapter->tx_ring.next_to_use = i;
1319
1320                 return true;
1321         }
1322
1323         return false;
1324 }
1325
1326 #define IXGB_MAX_TXD_PWR        14
1327 #define IXGB_MAX_DATA_PER_TXD   (1<<IXGB_MAX_TXD_PWR)
1328
1329 static int
1330 ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
1331             unsigned int first)
1332 {
1333         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1334         struct pci_dev *pdev = adapter->pdev;
1335         struct ixgb_buffer *buffer_info;
1336         int len = skb_headlen(skb);
1337         unsigned int offset = 0, size, count = 0, i;
1338         unsigned int mss = skb_shinfo(skb)->gso_size;
1339         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
1340         unsigned int f;
1341
1342         i = tx_ring->next_to_use;
1343
1344         while (len) {
1345                 buffer_info = &tx_ring->buffer_info[i];
1346                 size = min(len, IXGB_MAX_DATA_PER_TXD);
1347                 /* Workaround for premature desc write-backs
1348                  * in TSO mode.  Append 4-byte sentinel desc */
1349                 if (unlikely(mss && !nr_frags && size == len && size > 8))
1350                         size -= 4;
1351
1352                 buffer_info->length = size;
1353                 WARN_ON(buffer_info->dma != 0);
1354                 buffer_info->time_stamp = jiffies;
1355                 buffer_info->mapped_as_page = false;
1356                 buffer_info->dma = dma_map_single(&pdev->dev,
1357                                                   skb->data + offset,
1358                                                   size, DMA_TO_DEVICE);
1359                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
1360                         goto dma_error;
1361                 buffer_info->next_to_watch = 0;
1362
1363                 len -= size;
1364                 offset += size;
1365                 count++;
1366                 if (len) {
1367                         i++;
1368                         if (i == tx_ring->count)
1369                                 i = 0;
1370                 }
1371         }
1372
1373         for (f = 0; f < nr_frags; f++) {
1374                 const struct skb_frag_struct *frag;
1375
1376                 frag = &skb_shinfo(skb)->frags[f];
1377                 len = skb_frag_size(frag);
1378                 offset = 0;
1379
1380                 while (len) {
1381                         i++;
1382                         if (i == tx_ring->count)
1383                                 i = 0;
1384
1385                         buffer_info = &tx_ring->buffer_info[i];
1386                         size = min(len, IXGB_MAX_DATA_PER_TXD);
1387
1388                         /* Workaround for premature desc write-backs
1389                          * in TSO mode.  Append 4-byte sentinel desc */
1390                         if (unlikely(mss && (f == (nr_frags - 1))
1391                                      && size == len && size > 8))
1392                                 size -= 4;
1393
1394                         buffer_info->length = size;
1395                         buffer_info->time_stamp = jiffies;
1396                         buffer_info->mapped_as_page = true;
1397                         buffer_info->dma =
1398                                 skb_frag_dma_map(&pdev->dev, frag, offset, size,
1399                                                  DMA_TO_DEVICE);
1400                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
1401                                 goto dma_error;
1402                         buffer_info->next_to_watch = 0;
1403
1404                         len -= size;
1405                         offset += size;
1406                         count++;
1407                 }
1408         }
1409         tx_ring->buffer_info[i].skb = skb;
1410         tx_ring->buffer_info[first].next_to_watch = i;
1411
1412         return count;
1413
1414 dma_error:
1415         dev_err(&pdev->dev, "TX DMA map failed\n");
1416         buffer_info->dma = 0;
1417         if (count)
1418                 count--;
1419
1420         while (count--) {
1421                 if (i==0)
1422                         i += tx_ring->count;
1423                 i--;
1424                 buffer_info = &tx_ring->buffer_info[i];
1425                 ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1426         }
1427
1428         return 0;
1429 }
1430
1431 static void
1432 ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
1433 {
1434         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1435         struct ixgb_tx_desc *tx_desc = NULL;
1436         struct ixgb_buffer *buffer_info;
1437         u32 cmd_type_len = adapter->tx_cmd_type;
1438         u8 status = 0;
1439         u8 popts = 0;
1440         unsigned int i;
1441
1442         if (tx_flags & IXGB_TX_FLAGS_TSO) {
1443                 cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
1444                 popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
1445         }
1446
1447         if (tx_flags & IXGB_TX_FLAGS_CSUM)
1448                 popts |= IXGB_TX_DESC_POPTS_TXSM;
1449
1450         if (tx_flags & IXGB_TX_FLAGS_VLAN)
1451                 cmd_type_len |= IXGB_TX_DESC_CMD_VLE;
1452
1453         i = tx_ring->next_to_use;
1454
1455         while (count--) {
1456                 buffer_info = &tx_ring->buffer_info[i];
1457                 tx_desc = IXGB_TX_DESC(*tx_ring, i);
1458                 tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
1459                 tx_desc->cmd_type_len =
1460                         cpu_to_le32(cmd_type_len | buffer_info->length);
1461                 tx_desc->status = status;
1462                 tx_desc->popts = popts;
1463                 tx_desc->vlan = cpu_to_le16(vlan_id);
1464
1465                 if (++i == tx_ring->count) i = 0;
1466         }
1467
1468         tx_desc->cmd_type_len |=
1469                 cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);
1470
1471         /* Force memory writes to complete before letting h/w
1472          * know there are new descriptors to fetch.  (Only
1473          * applicable for weak-ordered memory model archs,
1474          * such as IA-64). */
1475         wmb();
1476
1477         tx_ring->next_to_use = i;
1478         IXGB_WRITE_REG(&adapter->hw, TDT, i);
1479 }
1480
1481 static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
1482 {
1483         struct ixgb_adapter *adapter = netdev_priv(netdev);
1484         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1485
1486         netif_stop_queue(netdev);
1487         /* Herbert's original patch had:
1488          *  smp_mb__after_netif_stop_queue();
1489          * but since that doesn't exist yet, just open code it. */
1490         smp_mb();
1491
1492         /* We need to check again in a case another CPU has just
1493          * made room available. */
1494         if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
1495                 return -EBUSY;
1496
1497         /* A reprieve! */
1498         netif_start_queue(netdev);
1499         ++adapter->restart_queue;
1500         return 0;
1501 }
1502
1503 static int ixgb_maybe_stop_tx(struct net_device *netdev,
1504                               struct ixgb_desc_ring *tx_ring, int size)
1505 {
1506         if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
1507                 return 0;
1508         return __ixgb_maybe_stop_tx(netdev, size);
1509 }
1510
1511
1512 /* Tx Descriptors needed, worst case */
1513 #define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
1514                          (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
1515 #define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
1516         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
1517         + 1 /* one more needed for sentinel TSO workaround */
1518
1519 static netdev_tx_t
1520 ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1521 {
1522         struct ixgb_adapter *adapter = netdev_priv(netdev);
1523         unsigned int first;
1524         unsigned int tx_flags = 0;
1525         int vlan_id = 0;
1526         int count = 0;
1527         int tso;
1528
1529         if (test_bit(__IXGB_DOWN, &adapter->flags)) {
1530                 dev_kfree_skb(skb);
1531                 return NETDEV_TX_OK;
1532         }
1533
1534         if (skb->len <= 0) {
1535                 dev_kfree_skb(skb);
1536                 return NETDEV_TX_OK;
1537         }
1538
1539         if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
1540                      DESC_NEEDED)))
1541                 return NETDEV_TX_BUSY;
1542
1543         if (vlan_tx_tag_present(skb)) {
1544                 tx_flags |= IXGB_TX_FLAGS_VLAN;
1545                 vlan_id = vlan_tx_tag_get(skb);
1546         }
1547
1548         first = adapter->tx_ring.next_to_use;
1549
1550         tso = ixgb_tso(adapter, skb);
1551         if (tso < 0) {
1552                 dev_kfree_skb(skb);
1553                 return NETDEV_TX_OK;
1554         }
1555
1556         if (likely(tso))
1557                 tx_flags |= IXGB_TX_FLAGS_TSO;
1558         else if (ixgb_tx_csum(adapter, skb))
1559                 tx_flags |= IXGB_TX_FLAGS_CSUM;
1560
1561         count = ixgb_tx_map(adapter, skb, first);
1562
1563         if (count) {
1564                 ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
1565                 /* Make sure there is space in the ring for the next send. */
1566                 ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);
1567
1568         } else {
1569                 dev_kfree_skb_any(skb);
1570                 adapter->tx_ring.buffer_info[first].time_stamp = 0;
1571                 adapter->tx_ring.next_to_use = first;
1572         }
1573
1574         return NETDEV_TX_OK;
1575 }
1576
1577 /**
1578  * ixgb_tx_timeout - Respond to a Tx Hang
1579  * @netdev: network interface device structure
1580  **/
1581
1582 static void
1583 ixgb_tx_timeout(struct net_device *netdev)
1584 {
1585         struct ixgb_adapter *adapter = netdev_priv(netdev);
1586
1587         /* Do the reset outside of interrupt context */
1588         schedule_work(&adapter->tx_timeout_task);
1589 }
1590
1591 static void
1592 ixgb_tx_timeout_task(struct work_struct *work)
1593 {
1594         struct ixgb_adapter *adapter =
1595                 container_of(work, struct ixgb_adapter, tx_timeout_task);
1596
1597         adapter->tx_timeout_count++;
1598         ixgb_down(adapter, true);
1599         ixgb_up(adapter);
1600 }
1601
1602 /**
1603  * ixgb_get_stats - Get System Network Statistics
1604  * @netdev: network interface device structure
1605  *
1606  * Returns the address of the device statistics structure.
1607  * The statistics are actually updated from the timer callback.
1608  **/
1609
1610 static struct net_device_stats *
1611 ixgb_get_stats(struct net_device *netdev)
1612 {
1613         return &netdev->stats;
1614 }
1615
1616 /**
1617  * ixgb_change_mtu - Change the Maximum Transfer Unit
1618  * @netdev: network interface device structure
1619  * @new_mtu: new value for maximum frame size
1620  *
1621  * Returns 0 on success, negative on failure
1622  **/
1623
1624 static int
1625 ixgb_change_mtu(struct net_device *netdev, int new_mtu)
1626 {
1627         struct ixgb_adapter *adapter = netdev_priv(netdev);
1628         int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1629         int old_max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
1630
1631         /* MTU < 68 is an error for IPv4 traffic, just don't allow it */
1632         if ((new_mtu < 68) ||
1633             (max_frame > IXGB_MAX_JUMBO_FRAME_SIZE + ENET_FCS_LENGTH)) {
1634                 netif_err(adapter, probe, adapter->netdev,
1635                           "Invalid MTU setting %d\n", new_mtu);
1636                 return -EINVAL;
1637         }
1638
1639         if (old_max_frame == max_frame)
1640                 return 0;
1641
1642         if (netif_running(netdev))
1643                 ixgb_down(adapter, true);
1644
1645         adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */
1646
1647         netdev->mtu = new_mtu;
1648
1649         if (netif_running(netdev))
1650                 ixgb_up(adapter);
1651
1652         return 0;
1653 }
1654
1655 /**
1656  * ixgb_update_stats - Update the board statistics counters.
1657  * @adapter: board private structure
1658  **/
1659
1660 void
1661 ixgb_update_stats(struct ixgb_adapter *adapter)
1662 {
1663         struct net_device *netdev = adapter->netdev;
1664         struct pci_dev *pdev = adapter->pdev;
1665
1666         /* Prevent stats update while adapter is being reset */
1667         if (pci_channel_offline(pdev))
1668                 return;
1669
1670         if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
1671            (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
1672                 u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
1673                 u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
1674                 u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
1675                 u64 bcast = ((u64)bcast_h << 32) | bcast_l;
1676
1677                 multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
1678                 /* fix up multicast stats by removing broadcasts */
1679                 if (multi >= bcast)
1680                         multi -= bcast;
1681
1682                 adapter->stats.mprcl += (multi & 0xFFFFFFFF);
1683                 adapter->stats.mprch += (multi >> 32);
1684                 adapter->stats.bprcl += bcast_l;
1685                 adapter->stats.bprch += bcast_h;
1686         } else {
1687                 adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
1688                 adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
1689                 adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
1690                 adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
1691         }
1692         adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
1693         adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
1694         adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
1695         adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
1696         adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
1697         adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
1698         adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
1699         adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
1700         adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
1701         adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
1702         adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
1703         adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
1704         adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
1705         adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
1706         adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
1707         adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
1708         adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
1709         adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
1710         adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
1711         adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
1712         adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
1713         adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
1714         adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
1715         adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
1716         adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
1717         adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
1718         adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
1719         adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
1720         adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
1721         adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
1722         adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
1723         adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
1724         adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
1725         adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
1726         adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
1727         adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
1728         adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
1729         adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
1730         adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
1731         adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
1732         adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
1733         adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
1734         adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
1735         adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
1736         adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
1737         adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
1738         adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
1739         adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
1740         adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
1741         adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
1742         adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
1743         adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
1744         adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
1745         adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
1746         adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
1747         adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);
1748
1749         /* Fill out the OS statistics structure */
1750
1751         netdev->stats.rx_packets = adapter->stats.gprcl;
1752         netdev->stats.tx_packets = adapter->stats.gptcl;
1753         netdev->stats.rx_bytes = adapter->stats.gorcl;
1754         netdev->stats.tx_bytes = adapter->stats.gotcl;
1755         netdev->stats.multicast = adapter->stats.mprcl;
1756         netdev->stats.collisions = 0;
1757
1758         /* ignore RLEC as it reports errors for padded (<64bytes) frames
1759          * with a length in the type/len field */
1760         netdev->stats.rx_errors =
1761             /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
1762             adapter->stats.ruc +
1763             adapter->stats.roc /*+ adapter->stats.rlec */  +
1764             adapter->stats.icbc +
1765             adapter->stats.ecbc + adapter->stats.mpc;
1766
1767         /* see above
1768          * netdev->stats.rx_length_errors = adapter->stats.rlec;
1769          */
1770
1771         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
1772         netdev->stats.rx_fifo_errors = adapter->stats.mpc;
1773         netdev->stats.rx_missed_errors = adapter->stats.mpc;
1774         netdev->stats.rx_over_errors = adapter->stats.mpc;
1775
1776         netdev->stats.tx_errors = 0;
1777         netdev->stats.rx_frame_errors = 0;
1778         netdev->stats.tx_aborted_errors = 0;
1779         netdev->stats.tx_carrier_errors = 0;
1780         netdev->stats.tx_fifo_errors = 0;
1781         netdev->stats.tx_heartbeat_errors = 0;
1782         netdev->stats.tx_window_errors = 0;
1783 }
1784
1785 #define IXGB_MAX_INTR 10
1786 /**
1787  * ixgb_intr - Interrupt Handler
1788  * @irq: interrupt number
1789  * @data: pointer to a network interface device structure
1790  **/
1791
1792 static irqreturn_t
1793 ixgb_intr(int irq, void *data)
1794 {
1795         struct net_device *netdev = data;
1796         struct ixgb_adapter *adapter = netdev_priv(netdev);
1797         struct ixgb_hw *hw = &adapter->hw;
1798         u32 icr = IXGB_READ_REG(hw, ICR);
1799
1800         if (unlikely(!icr))
1801                 return IRQ_NONE;  /* Not our interrupt */
1802
1803         if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
1804                 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1805                         mod_timer(&adapter->watchdog_timer, jiffies);
1806
1807         if (napi_schedule_prep(&adapter->napi)) {
1808
1809                 /* Disable interrupts and register for poll. The flush
1810                   of the posted write is intentionally left out.
1811                 */
1812
1813                 IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
1814                 __napi_schedule(&adapter->napi);
1815         }
1816         return IRQ_HANDLED;
1817 }
1818
1819 /**
1820  * ixgb_clean - NAPI Rx polling callback
1821  * @adapter: board private structure
1822  **/
1823
1824 static int
1825 ixgb_clean(struct napi_struct *napi, int budget)
1826 {
1827         struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
1828         int work_done = 0;
1829
1830         ixgb_clean_tx_irq(adapter);
1831         ixgb_clean_rx_irq(adapter, &work_done, budget);
1832
1833         /* If budget not fully consumed, exit the polling mode */
1834         if (work_done < budget) {
1835                 napi_complete(napi);
1836                 if (!test_bit(__IXGB_DOWN, &adapter->flags))
1837                         ixgb_irq_enable(adapter);
1838         }
1839
1840         return work_done;
1841 }
1842
1843 /**
1844  * ixgb_clean_tx_irq - Reclaim resources after transmit completes
1845  * @adapter: board private structure
1846  **/
1847
1848 static bool
1849 ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
1850 {
1851         struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
1852         struct net_device *netdev = adapter->netdev;
1853         struct ixgb_tx_desc *tx_desc, *eop_desc;
1854         struct ixgb_buffer *buffer_info;
1855         unsigned int i, eop;
1856         bool cleaned = false;
1857
1858         i = tx_ring->next_to_clean;
1859         eop = tx_ring->buffer_info[i].next_to_watch;
1860         eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1861
1862         while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {
1863
1864                 rmb(); /* read buffer_info after eop_desc */
1865                 for (cleaned = false; !cleaned; ) {
1866                         tx_desc = IXGB_TX_DESC(*tx_ring, i);
1867                         buffer_info = &tx_ring->buffer_info[i];
1868
1869                         if (tx_desc->popts &
1870                            (IXGB_TX_DESC_POPTS_TXSM |
1871                             IXGB_TX_DESC_POPTS_IXSM))
1872                                 adapter->hw_csum_tx_good++;
1873
1874                         ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
1875
1876                         *(u32 *)&(tx_desc->status) = 0;
1877
1878                         cleaned = (i == eop);
1879                         if (++i == tx_ring->count) i = 0;
1880                 }
1881
1882                 eop = tx_ring->buffer_info[i].next_to_watch;
1883                 eop_desc = IXGB_TX_DESC(*tx_ring, eop);
1884         }
1885
1886         tx_ring->next_to_clean = i;
1887
1888         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
1889                      IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
1890                 /* Make sure that anybody stopping the queue after this
1891                  * sees the new next_to_clean. */
1892                 smp_mb();
1893
1894                 if (netif_queue_stopped(netdev) &&
1895                     !(test_bit(__IXGB_DOWN, &adapter->flags))) {
1896                         netif_wake_queue(netdev);
1897                         ++adapter->restart_queue;
1898                 }
1899         }
1900
1901         if (adapter->detect_tx_hung) {
1902                 /* detect a transmit hang in hardware, this serializes the
1903                  * check with the clearing of time_stamp and movement of i */
1904                 adapter->detect_tx_hung = false;
1905                 if (tx_ring->buffer_info[eop].time_stamp &&
1906                    time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
1907                    && !(IXGB_READ_REG(&adapter->hw, STATUS) &
1908                         IXGB_STATUS_TXOFF)) {
1909                         /* detected Tx unit hang */
1910                         netif_err(adapter, drv, adapter->netdev,
1911                                   "Detected Tx Unit Hang\n"
1912                                   "  TDH                  <%x>\n"
1913                                   "  TDT                  <%x>\n"
1914                                   "  next_to_use          <%x>\n"
1915                                   "  next_to_clean        <%x>\n"
1916                                   "buffer_info[next_to_clean]\n"
1917                                   "  time_stamp           <%lx>\n"
1918                                   "  next_to_watch        <%x>\n"
1919                                   "  jiffies              <%lx>\n"
1920                                   "  next_to_watch.status <%x>\n",
1921                                   IXGB_READ_REG(&adapter->hw, TDH),
1922                                   IXGB_READ_REG(&adapter->hw, TDT),
1923                                   tx_ring->next_to_use,
1924                                   tx_ring->next_to_clean,
1925                                   tx_ring->buffer_info[eop].time_stamp,
1926                                   eop,
1927                                   jiffies,
1928                                   eop_desc->status);
1929                         netif_stop_queue(netdev);
1930                 }
1931         }
1932
1933         return cleaned;
1934 }
1935
1936 /**
1937  * ixgb_rx_checksum - Receive Checksum Offload for 82597.
1938  * @adapter: board private structure
1939  * @rx_desc: receive descriptor
1940  * @sk_buff: socket buffer with received data
1941  **/
1942
1943 static void
1944 ixgb_rx_checksum(struct ixgb_adapter *adapter,
1945                  struct ixgb_rx_desc *rx_desc,
1946                  struct sk_buff *skb)
1947 {
1948         /* Ignore Checksum bit is set OR
1949          * TCP Checksum has not been calculated
1950          */
1951         if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
1952            (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
1953                 skb_checksum_none_assert(skb);
1954                 return;
1955         }
1956
1957         /* At this point we know the hardware did the TCP checksum */
1958         /* now look at the TCP checksum error bit */
1959         if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
1960                 /* let the stack verify checksum errors */
1961                 skb_checksum_none_assert(skb);
1962                 adapter->hw_csum_rx_error++;
1963         } else {
1964                 /* TCP checksum is good */
1965                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1966                 adapter->hw_csum_rx_good++;
1967         }
1968 }
1969
1970 /*
1971  * this should improve performance for small packets with large amounts
1972  * of reassembly being done in the stack
1973  */
1974 static void ixgb_check_copybreak(struct net_device *netdev,
1975                                  struct ixgb_buffer *buffer_info,
1976                                  u32 length, struct sk_buff **skb)
1977 {
1978         struct sk_buff *new_skb;
1979
1980         if (length > copybreak)
1981                 return;
1982
1983         new_skb = netdev_alloc_skb_ip_align(netdev, length);
1984         if (!new_skb)
1985                 return;
1986
1987         skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
1988                                        (*skb)->data - NET_IP_ALIGN,
1989                                        length + NET_IP_ALIGN);
1990         /* save the skb in buffer_info as good */
1991         buffer_info->skb = *skb;
1992         *skb = new_skb;
1993 }
1994
1995 /**
1996  * ixgb_clean_rx_irq - Send received data up the network stack,
1997  * @adapter: board private structure
1998  **/
1999
2000 static bool
2001 ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
2002 {
2003         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2004         struct net_device *netdev = adapter->netdev;
2005         struct pci_dev *pdev = adapter->pdev;
2006         struct ixgb_rx_desc *rx_desc, *next_rxd;
2007         struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
2008         u32 length;
2009         unsigned int i, j;
2010         int cleaned_count = 0;
2011         bool cleaned = false;
2012
2013         i = rx_ring->next_to_clean;
2014         rx_desc = IXGB_RX_DESC(*rx_ring, i);
2015         buffer_info = &rx_ring->buffer_info[i];
2016
2017         while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
2018                 struct sk_buff *skb;
2019                 u8 status;
2020
2021                 if (*work_done >= work_to_do)
2022                         break;
2023
2024                 (*work_done)++;
2025                 rmb();  /* read descriptor and rx_buffer_info after status DD */
2026                 status = rx_desc->status;
2027                 skb = buffer_info->skb;
2028                 buffer_info->skb = NULL;
2029
2030                 prefetch(skb->data - NET_IP_ALIGN);
2031
2032                 if (++i == rx_ring->count)
2033                         i = 0;
2034                 next_rxd = IXGB_RX_DESC(*rx_ring, i);
2035                 prefetch(next_rxd);
2036
2037                 j = i + 1;
2038                 if (j == rx_ring->count)
2039                         j = 0;
2040                 next2_buffer = &rx_ring->buffer_info[j];
2041                 prefetch(next2_buffer);
2042
2043                 next_buffer = &rx_ring->buffer_info[i];
2044
2045                 cleaned = true;
2046                 cleaned_count++;
2047
2048                 dma_unmap_single(&pdev->dev,
2049                                  buffer_info->dma,
2050                                  buffer_info->length,
2051                                  DMA_FROM_DEVICE);
2052                 buffer_info->dma = 0;
2053
2054                 length = le16_to_cpu(rx_desc->length);
2055                 rx_desc->length = 0;
2056
2057                 if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
2058
2059                         /* All receives must fit into a single buffer */
2060
2061                         pr_debug("Receive packet consumed multiple buffers length<%x>\n",
2062                                  length);
2063
2064                         dev_kfree_skb_irq(skb);
2065                         goto rxdesc_done;
2066                 }
2067
2068                 if (unlikely(rx_desc->errors &
2069                     (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
2070                      IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
2071                         dev_kfree_skb_irq(skb);
2072                         goto rxdesc_done;
2073                 }
2074
2075                 ixgb_check_copybreak(netdev, buffer_info, length, &skb);
2076
2077                 /* Good Receive */
2078                 skb_put(skb, length);
2079
2080                 /* Receive Checksum Offload */
2081                 ixgb_rx_checksum(adapter, rx_desc, skb);
2082
2083                 skb->protocol = eth_type_trans(skb, netdev);
2084                 if (status & IXGB_RX_DESC_STATUS_VP)
2085                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2086                                        le16_to_cpu(rx_desc->special));
2087
2088                 netif_receive_skb(skb);
2089
2090 rxdesc_done:
2091                 /* clean up descriptor, might be written over by hw */
2092                 rx_desc->status = 0;
2093
2094                 /* return some buffers to hardware, one at a time is too slow */
2095                 if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
2096                         ixgb_alloc_rx_buffers(adapter, cleaned_count);
2097                         cleaned_count = 0;
2098                 }
2099
2100                 /* use prefetched values */
2101                 rx_desc = next_rxd;
2102                 buffer_info = next_buffer;
2103         }
2104
2105         rx_ring->next_to_clean = i;
2106
2107         cleaned_count = IXGB_DESC_UNUSED(rx_ring);
2108         if (cleaned_count)
2109                 ixgb_alloc_rx_buffers(adapter, cleaned_count);
2110
2111         return cleaned;
2112 }
2113
2114 /**
2115  * ixgb_alloc_rx_buffers - Replace used receive buffers
2116  * @adapter: address of board private structure
2117  **/
2118
2119 static void
2120 ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
2121 {
2122         struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
2123         struct net_device *netdev = adapter->netdev;
2124         struct pci_dev *pdev = adapter->pdev;
2125         struct ixgb_rx_desc *rx_desc;
2126         struct ixgb_buffer *buffer_info;
2127         struct sk_buff *skb;
2128         unsigned int i;
2129         long cleancount;
2130
2131         i = rx_ring->next_to_use;
2132         buffer_info = &rx_ring->buffer_info[i];
2133         cleancount = IXGB_DESC_UNUSED(rx_ring);
2134
2135
2136         /* leave three descriptors unused */
2137         while (--cleancount > 2 && cleaned_count--) {
2138                 /* recycle! its good for you */
2139                 skb = buffer_info->skb;
2140                 if (skb) {
2141                         skb_trim(skb, 0);
2142                         goto map_skb;
2143                 }
2144
2145                 skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
2146                 if (unlikely(!skb)) {
2147                         /* Better luck next round */
2148                         adapter->alloc_rx_buff_failed++;
2149                         break;
2150                 }
2151
2152                 buffer_info->skb = skb;
2153                 buffer_info->length = adapter->rx_buffer_len;
2154 map_skb:
2155                 buffer_info->dma = dma_map_single(&pdev->dev,
2156                                                   skb->data,
2157                                                   adapter->rx_buffer_len,
2158                                                   DMA_FROM_DEVICE);
2159                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
2160                         adapter->alloc_rx_buff_failed++;
2161                         break;
2162                 }
2163
2164                 rx_desc = IXGB_RX_DESC(*rx_ring, i);
2165                 rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
2166                 /* guarantee DD bit not set now before h/w gets descriptor
2167                  * this is the rest of the workaround for h/w double
2168                  * writeback. */
2169                 rx_desc->status = 0;
2170
2171
2172                 if (++i == rx_ring->count)
2173                         i = 0;
2174                 buffer_info = &rx_ring->buffer_info[i];
2175         }
2176
2177         if (likely(rx_ring->next_to_use != i)) {
2178                 rx_ring->next_to_use = i;
2179                 if (unlikely(i-- == 0))
2180                         i = (rx_ring->count - 1);
2181
2182                 /* Force memory writes to complete before letting h/w
2183                  * know there are new descriptors to fetch.  (Only
2184                  * applicable for weak-ordered memory model archs, such
2185                  * as IA-64). */
2186                 wmb();
2187                 IXGB_WRITE_REG(&adapter->hw, RDT, i);
2188         }
2189 }
2190
2191 static void
2192 ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
2193 {
2194         u32 ctrl;
2195
2196         /* enable VLAN tag insert/strip */
2197         ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2198         ctrl |= IXGB_CTRL0_VME;
2199         IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2200 }
2201
2202 static void
2203 ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
2204 {
2205         u32 ctrl;
2206
2207         /* disable VLAN tag insert/strip */
2208         ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
2209         ctrl &= ~IXGB_CTRL0_VME;
2210         IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
2211 }
2212
2213 static int
2214 ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2215 {
2216         struct ixgb_adapter *adapter = netdev_priv(netdev);
2217         u32 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         set_bit(vid, adapter->active_vlans);
2226
2227         return 0;
2228 }
2229
2230 static int
2231 ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2232 {
2233         struct ixgb_adapter *adapter = netdev_priv(netdev);
2234         u32 vfta, index;
2235
2236         /* remove VID from filter table */
2237
2238         index = (vid >> 5) & 0x7F;
2239         vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2240         vfta &= ~(1 << (vid & 0x1F));
2241         ixgb_write_vfta(&adapter->hw, index, vfta);
2242         clear_bit(vid, adapter->active_vlans);
2243
2244         return 0;
2245 }
2246
2247 static void
2248 ixgb_restore_vlan(struct ixgb_adapter *adapter)
2249 {
2250         u16 vid;
2251
2252         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2253                 ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
2254 }
2255
2256 #ifdef CONFIG_NET_POLL_CONTROLLER
2257 /*
2258  * Polling 'interrupt' - used by things like netconsole to send skbs
2259  * without having to re-enable interrupts. It's not called while
2260  * the interrupt routine is executing.
2261  */
2262
2263 static void ixgb_netpoll(struct net_device *dev)
2264 {
2265         struct ixgb_adapter *adapter = netdev_priv(dev);
2266
2267         disable_irq(adapter->pdev->irq);
2268         ixgb_intr(adapter->pdev->irq, dev);
2269         enable_irq(adapter->pdev->irq);
2270 }
2271 #endif
2272
2273 /**
2274  * ixgb_io_error_detected - called when PCI error is detected
2275  * @pdev:    pointer to pci device with error
2276  * @state:   pci channel state after error
2277  *
2278  * This callback is called by the PCI subsystem whenever
2279  * a PCI bus error is detected.
2280  */
2281 static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
2282                                                enum pci_channel_state state)
2283 {
2284         struct net_device *netdev = pci_get_drvdata(pdev);
2285         struct ixgb_adapter *adapter = netdev_priv(netdev);
2286
2287         netif_device_detach(netdev);
2288
2289         if (state == pci_channel_io_perm_failure)
2290                 return PCI_ERS_RESULT_DISCONNECT;
2291
2292         if (netif_running(netdev))
2293                 ixgb_down(adapter, true);
2294
2295         pci_disable_device(pdev);
2296
2297         /* Request a slot reset. */
2298         return PCI_ERS_RESULT_NEED_RESET;
2299 }
2300
2301 /**
2302  * ixgb_io_slot_reset - called after the pci bus has been reset.
2303  * @pdev    pointer to pci device with error
2304  *
2305  * This callback is called after the PCI bus has been reset.
2306  * Basically, this tries to restart the card from scratch.
2307  * This is a shortened version of the device probe/discovery code,
2308  * it resembles the first-half of the ixgb_probe() routine.
2309  */
2310 static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
2311 {
2312         struct net_device *netdev = pci_get_drvdata(pdev);
2313         struct ixgb_adapter *adapter = netdev_priv(netdev);
2314
2315         if (pci_enable_device(pdev)) {
2316                 netif_err(adapter, probe, adapter->netdev,
2317                           "Cannot re-enable PCI device after reset\n");
2318                 return PCI_ERS_RESULT_DISCONNECT;
2319         }
2320
2321         /* Perform card reset only on one instance of the card */
2322         if (0 != PCI_FUNC (pdev->devfn))
2323                 return PCI_ERS_RESULT_RECOVERED;
2324
2325         pci_set_master(pdev);
2326
2327         netif_carrier_off(netdev);
2328         netif_stop_queue(netdev);
2329         ixgb_reset(adapter);
2330
2331         /* Make sure the EEPROM is good */
2332         if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
2333                 netif_err(adapter, probe, adapter->netdev,
2334                           "After reset, the EEPROM checksum is not valid\n");
2335                 return PCI_ERS_RESULT_DISCONNECT;
2336         }
2337         ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
2338         memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
2339
2340         if (!is_valid_ether_addr(netdev->perm_addr)) {
2341                 netif_err(adapter, probe, adapter->netdev,
2342                           "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                         pr_err("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 */