drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  *
  33  * 5.2.39       3/12/04
  34  *   o Added support to read/write eeprom data in proper order.
  35  *     By default device eeprom is always little-endian, word
  36  *     addressable
  37  *   o Disable TSO as the default for the driver until hangs
  38  *     reported against non-IA acrhs can be root-caused.
  39  *   o Back out the CSA fix for 82547 as it continues to cause
  40  *     systems lock-ups with production systems.
  41  *   o Fixed FC high/low water mark values to actually be in the
  42  *     range of the Rx FIFO area.  It was a math error.
  43  *     [Dainis Jonitis (dainis_jonitis@exigengroup.lv)]
  44  *   o Handle failure to get new resources when doing ethtool
  45  *     ring paramater changes.  Previously, driver would free old,
  46  *     but fails to allocate new, causing problems.  Now, driver
  47  *     allocates new, and if sucessful, frees old.
  48  *   o Changed collision threshold from 16 to 15 to comply with IEEE
  49  *     spec.
  50  *   o Toggle chip-select when checking ready status on SPI eeproms.
  51  *   o Put PHY into class A mode to pass IEEE tests on some designs.
  52  *     Designs with EEPROM word 0x7, bit 15 set will have their PHYs
  53  *     set to class A mode, rather than the default class AB.
  54  *   o Handle failures of register_netdev.  Stephen Hemminger
  55  *     [shemminger@osdl.org].
  56  *   o updated README & MAN pages, number of Transmit/Receive
  57  *     descriptors may be denied depending on system resources.
  58  *
  59  * 5.2.30       1/14/03
  60  *   o Set VLAN filtering to IEEE 802.1Q after reset so we don't break
  61  *     SoL connections that use VLANs.
  62  *   o Allow 1000/Full setting for AutoNeg param for Fiber connections
  63  *     Jon D Mason [jonmason@us.ibm.com].
  64  *   o Race between Tx queue and Tx clean fixed with a spin lock.
  65  *   o Added netpoll support.
  66  *   o Fixed endianess bug causing ethtool loopback diags to fail on ppc.
  67  *   o Use pdev->irq rather than netdev->irq in preparation for MSI support.
  68  *   o Report driver message on user override of InterruptThrottleRate
  69  *     module parameter.
  70  *   o Change I/O address storage from uint32_t to unsigned long.
  71  *   o Added ethtool RINGPARAM support.
  72  *
  73  * 5.2.22       10/15/03
  74  */
  75
  76 char e1000_driver_name[] = "e1000";
  77 char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  78 char e1000_driver_version[] = "5.2.39-k2";
  79 char e1000_copyright[] = "Copyright (c) 1999-2004 Intel Corporation.";
  80
  81 /* e1000_pci_tbl - PCI Device ID Table
  82  *
  83  * Wildcard entries (PCI_ANY_ID) should come last
  84  * Last entry must be all 0s
  85  *
  86  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  87  *   Class, Class Mask, private data (not used) }
  88  */
  89 static struct pci_device_id e1000_pci_tbl[] = {
  90         {0x8086, 0x1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  91         {0x8086, 0x1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  92         {0x8086, 0x1004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  93         {0x8086, 0x1008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  94         {0x8086, 0x1009, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  95         {0x8086, 0x100C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  96         {0x8086, 0x100D, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  97         {0x8086, 0x100E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  98         {0x8086, 0x100F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  99         {0x8086, 0x1010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 100         {0x8086, 0x1011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 101         {0x8086, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 102         {0x8086, 0x1013, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 103         {0x8086, 0x1015, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 104         {0x8086, 0x1016, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 105         {0x8086, 0x1017, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 106         {0x8086, 0x1018, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 107         {0x8086, 0x1019, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 108         {0x8086, 0x101D, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 109         {0x8086, 0x101E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 110         {0x8086, 0x1026, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 111         {0x8086, 0x1027, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 112         {0x8086, 0x1028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 113         {0x8086, 0x1075, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 114         {0x8086, 0x1076, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 115         {0x8086, 0x1077, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 116         {0x8086, 0x1078, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 117         {0x8086, 0x1079, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 118         {0x8086, 0x107A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 119         {0x8086, 0x107B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 120         /* required last entry */
 121         {0,}
 122 };
 123
 124 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 125
 126 int e1000_up(struct e1000_adapter *adapter);
 127 void e1000_down(struct e1000_adapter *adapter);
 128 void e1000_reset(struct e1000_adapter *adapter);
 129 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 130 int e1000_setup_tx_resources(struct e1000_adapter *adapter);
 131 int e1000_setup_rx_resources(struct e1000_adapter *adapter);
 132 void e1000_free_tx_resources(struct e1000_adapter *adapter);
 133 void e1000_free_rx_resources(struct e1000_adapter *adapter);
 134 void e1000_update_stats(struct e1000_adapter *adapter);
 135
 136 /* Local Function Prototypes */
 137
 138 static int e1000_init_module(void);
 139 static void e1000_exit_module(void);
 140 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 141 static void __devexit e1000_remove(struct pci_dev *pdev);
 142 static int e1000_sw_init(struct e1000_adapter *adapter);
 143 static int e1000_open(struct net_device *netdev);
 144 static int e1000_close(struct net_device *netdev);
 145 static void e1000_configure_tx(struct e1000_adapter *adapter);
 146 static void e1000_configure_rx(struct e1000_adapter *adapter);
 147 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 148 static void e1000_clean_tx_ring(struct e1000_adapter *adapter);
 149 static void e1000_clean_rx_ring(struct e1000_adapter *adapter);
 150 static void e1000_set_multi(struct net_device *netdev);
 151 static void e1000_update_phy_info(unsigned long data);
 152 static void e1000_watchdog(unsigned long data);
 153 static void e1000_82547_tx_fifo_stall(unsigned long data);
 154 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 155 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 156 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 157 static int e1000_set_mac(struct net_device *netdev, void *p);
 158 static inline void e1000_irq_disable(struct e1000_adapter *adapter);
 159 static inline void e1000_irq_enable(struct e1000_adapter *adapter);
 160 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 161 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter);
 162 #ifdef CONFIG_E1000_NAPI
 163 static int e1000_clean(struct net_device *netdev, int *budget);
 164 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 165                                     int *work_done, int work_to_do);
 166 #else
 167 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter);
 168 #endif
 169 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
 170 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 171 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 172                            int cmd);
 173 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 174 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 175 static inline void e1000_rx_checksum(struct e1000_adapter *adapter,
 176                                      struct e1000_rx_desc *rx_desc,
 177                                      struct sk_buff *skb);
 178 static void e1000_tx_timeout(struct net_device *dev);
 179 static void e1000_tx_timeout_task(struct net_device *dev);
 180 static void e1000_smartspeed(struct e1000_adapter *adapter);
 181 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 182                                               struct sk_buff *skb);
 183
 184 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 185 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 186 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 187 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 188
 189 static int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr);
 190 static int e1000_suspend(struct pci_dev *pdev, uint32_t state);
 191 #ifdef CONFIG_PM
 192 static int e1000_resume(struct pci_dev *pdev);
 193 #endif
 194
 195 #ifdef CONFIG_NET_POLL_CONTROLLER
 196 /* for netdump / net console */
 197 static void e1000_netpoll (struct net_device *dev);
 198 #endif
 199
 200 struct notifier_block e1000_notifier_reboot = {
 201         .notifier_call  = e1000_notify_reboot,
 202         .next           = NULL,
 203         .priority       = 0
 204 };
 205
 206 /* Exported from other modules */
 207
 208 extern void e1000_check_options(struct e1000_adapter *adapter);
 209 extern int e1000_ethtool_ioctl(struct net_device *netdev, struct ifreq *ifr);
 210
 211 static struct pci_driver e1000_driver = {
 212         .name     = e1000_driver_name,
 213         .id_table = e1000_pci_tbl,
 214         .probe    = e1000_probe,
 215         .remove   = __devexit_p(e1000_remove),
 216         /* Power Managment Hooks */
 217 #ifdef CONFIG_PM
 218         .suspend  = e1000_suspend,
 219         .resume   = e1000_resume
 220 #endif
 221 };
 222
 223 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 224 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 225 MODULE_LICENSE("GPL");
 226
 227 /**
 228  * e1000_init_module - Driver Registration Routine
 229  *
 230  * e1000_init_module is the first routine called when the driver is
 231  * loaded. All it does is register with the PCI subsystem.
 232  **/
 233
 234 static int __init
 235 e1000_init_module(void)
 236 {
 237         int ret;
 238         printk(KERN_INFO "%s - version %s\n",
 239                e1000_driver_string, e1000_driver_version);
 240
 241         printk(KERN_INFO "%s\n", e1000_copyright);
 242
 243         ret = pci_module_init(&e1000_driver);
 244         if(ret >= 0) {
 245                 register_reboot_notifier(&e1000_notifier_reboot);
 246         }
 247         return ret;
 248 }
 249
 250 module_init(e1000_init_module);
 251
 252 /**
 253  * e1000_exit_module - Driver Exit Cleanup Routine
 254  *
 255  * e1000_exit_module is called just before the driver is removed
 256  * from memory.
 257  **/
 258
 259 static void __exit
 260 e1000_exit_module(void)
 261 {
 262         unregister_reboot_notifier(&e1000_notifier_reboot);
 263         pci_unregister_driver(&e1000_driver);
 264 }
 265
 266 module_exit(e1000_exit_module);
 267
 268
 269 int
 270 e1000_up(struct e1000_adapter *adapter)
 271 {
 272         struct net_device *netdev = adapter->netdev;
 273         int err;
 274
 275         /* hardware has been reset, we need to reload some things */
 276
 277         e1000_set_multi(netdev);
 278
 279         e1000_restore_vlan(adapter);
 280
 281         e1000_configure_tx(adapter);
 282         e1000_setup_rctl(adapter);
 283         e1000_configure_rx(adapter);
 284         e1000_alloc_rx_buffers(adapter);
 285
 286         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 287                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 288                               netdev->name, netdev)))
 289                 return err;
 290
 291         mod_timer(&adapter->watchdog_timer, jiffies);
 292         e1000_irq_enable(adapter);
 293
 294         return 0;
 295 }
 296
 297 void
 298 e1000_down(struct e1000_adapter *adapter)
 299 {
 300         struct net_device *netdev = adapter->netdev;
 301
 302         e1000_irq_disable(adapter);
 303         free_irq(adapter->pdev->irq, netdev);
 304         del_timer_sync(&adapter->tx_fifo_stall_timer);
 305         del_timer_sync(&adapter->watchdog_timer);
 306         del_timer_sync(&adapter->phy_info_timer);
 307         adapter->link_speed = 0;
 308         adapter->link_duplex = 0;
 309         netif_carrier_off(netdev);
 310         netif_stop_queue(netdev);
 311
 312         e1000_reset(adapter);
 313         e1000_clean_tx_ring(adapter);
 314         e1000_clean_rx_ring(adapter);
 315 }
 316
 317 void
 318 e1000_reset(struct e1000_adapter *adapter)
 319 {
 320         uint32_t pba;
 321         /* Repartition Pba for greater than 9k mtu
 322          * To take effect CTRL.RST is required.
 323          */
 324
 325         if(adapter->hw.mac_type < e1000_82547) {
 326                 if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
 327                         pba = E1000_PBA_40K;
 328                 else
 329                         pba = E1000_PBA_48K;
 330         } else {
 331                 if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
 332                         pba = E1000_PBA_22K;
 333                 else
 334                         pba = E1000_PBA_30K;
 335                 adapter->tx_fifo_head = 0;
 336                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 337                 adapter->tx_fifo_size =
 338                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 339                 atomic_set(&adapter->tx_fifo_stall, 0);
 340         }
 341         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 342
 343         /* flow control settings */
 344         adapter->hw.fc_high_water =
 345                 (pba << E1000_PBA_BYTES_SHIFT) - E1000_FC_HIGH_DIFF;
 346         adapter->hw.fc_low_water =
 347                 (pba << E1000_PBA_BYTES_SHIFT) - E1000_FC_LOW_DIFF;
 348         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 349         adapter->hw.fc_send_xon = 1;
 350         adapter->hw.fc = adapter->hw.original_fc;
 351
 352         e1000_reset_hw(&adapter->hw);
 353         if(adapter->hw.mac_type >= e1000_82544)
 354                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 355         e1000_init_hw(&adapter->hw);
 356
 357         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 358         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 359
 360         e1000_reset_adaptive(&adapter->hw);
 361         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 362 }
 363
 364 /**
 365  * e1000_probe - Device Initialization Routine
 366  * @pdev: PCI device information struct
 367  * @ent: entry in e1000_pci_tbl
 368  *
 369  * Returns 0 on success, negative on failure
 370  *
 371  * e1000_probe initializes an adapter identified by a pci_dev structure.
 372  * The OS initialization, configuring of the adapter private structure,
 373  * and a hardware reset occur.
 374  **/
 375
 376 static int __devinit
 377 e1000_probe(struct pci_dev *pdev,
 378             const struct pci_device_id *ent)
 379 {
 380         struct net_device *netdev;
 381         struct e1000_adapter *adapter;
 382         static int cards_found = 0;
 383         unsigned long mmio_start;
 384         int mmio_len;
 385         int pci_using_dac;
 386         int i;
 387         int err;
 388         uint16_t eeprom_data;
 389
 390         if((err = pci_enable_device(pdev)))
 391                 return err;
 392
 393         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 394                 pci_using_dac = 1;
 395         } else {
 396                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 397                         E1000_ERR("No usable DMA configuration, aborting\n");
 398                         return err;
 399                 }
 400                 pci_using_dac = 0;
 401         }
 402
 403         if((err = pci_request_regions(pdev, e1000_driver_name)))
 404                 return err;
 405
 406         pci_set_master(pdev);
 407
 408         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 409         if(!netdev) {
 410                 err = -ENOMEM;
 411                 goto err_alloc_etherdev;
 412         }
 413
 414         SET_MODULE_OWNER(netdev);
 415         SET_NETDEV_DEV(netdev, &pdev->dev);
 416
 417         pci_set_drvdata(pdev, netdev);
 418         adapter = netdev->priv;
 419         adapter->netdev = netdev;
 420         adapter->pdev = pdev;
 421         adapter->hw.back = adapter;
 422
 423         mmio_start = pci_resource_start(pdev, BAR_0);
 424         mmio_len = pci_resource_len(pdev, BAR_0);
 425
 426         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 427         if(!adapter->hw.hw_addr) {
 428                 err = -EIO;
 429                 goto err_ioremap;
 430         }
 431
 432         for(i = BAR_1; i <= BAR_5; i++) {
 433                 if(pci_resource_len(pdev, i) == 0)
 434                         continue;
 435                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 436                         adapter->hw.io_base = pci_resource_start(pdev, i);
 437                         break;
 438                 }
 439         }
 440
 441         netdev->open = &e1000_open;
 442         netdev->stop = &e1000_close;
 443         netdev->hard_start_xmit = &e1000_xmit_frame;
 444         netdev->get_stats = &e1000_get_stats;
 445         netdev->set_multicast_list = &e1000_set_multi;
 446         netdev->set_mac_address = &e1000_set_mac;
 447         netdev->change_mtu = &e1000_change_mtu;
 448         netdev->do_ioctl = &e1000_ioctl;
 449         netdev->tx_timeout = &e1000_tx_timeout;
 450         netdev->watchdog_timeo = 5 * HZ;
 451 #ifdef CONFIG_E1000_NAPI
 452         netdev->poll = &e1000_clean;
 453         netdev->weight = 64;
 454 #endif
 455         netdev->vlan_rx_register = e1000_vlan_rx_register;
 456         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 457         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 458 #ifdef CONFIG_NET_POLL_CONTROLLER
 459         netdev->poll_controller = e1000_netpoll;
 460 #endif
 461
 462         netdev->mem_start = mmio_start;
 463         netdev->mem_end = mmio_start + mmio_len;
 464         netdev->base_addr = adapter->hw.io_base;
 465
 466         adapter->bd_number = cards_found;
 467
 468         /* setup the private structure */
 469
 470         if((err = e1000_sw_init(adapter)))
 471                 goto err_sw_init;
 472
 473         if(adapter->hw.mac_type >= e1000_82543) {
 474                 netdev->features = NETIF_F_SG |
 475                                    NETIF_F_HW_CSUM |
 476                                    NETIF_F_HW_VLAN_TX |
 477                                    NETIF_F_HW_VLAN_RX |
 478                                    NETIF_F_HW_VLAN_FILTER;
 479         } else {
 480                 netdev->features = NETIF_F_SG;
 481         }
 482
 483 #ifdef NETIF_F_TSO
 484 #ifdef BROKEN_ON_NON_IA_ARCHS
 485         /* Disbaled for now until root-cause is found for
 486          * hangs reported against non-IA archs.  TSO can be
 487          * enabled using ethtool -K eth<x> tso on */
 488         if((adapter->hw.mac_type >= e1000_82544) &&
 489            (adapter->hw.mac_type != e1000_82547))
 490                 netdev->features |= NETIF_F_TSO;
 491 #endif
 492 #endif
 493
 494         if(pci_using_dac)
 495                 netdev->features |= NETIF_F_HIGHDMA;
 496
 497         /* before reading the EEPROM, reset the controller to
 498          * put the device in a known good starting state */
 499
 500         e1000_reset_hw(&adapter->hw);
 501
 502         /* make sure the EEPROM is good */
 503
 504         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 505                 printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
 506                 err = -EIO;
 507                 goto err_eeprom;
 508         }
 509
 510         /* copy the MAC address out of the EEPROM */
 511
 512         e1000_read_mac_addr(&adapter->hw);
 513         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 514
 515         if(!is_valid_ether_addr(netdev->dev_addr)) {
 516                 err = -EIO;
 517                 goto err_eeprom;
 518         }
 519
 520         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 521
 522         e1000_get_bus_info(&adapter->hw);
 523
 524         init_timer(&adapter->tx_fifo_stall_timer);
 525         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 526         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 527
 528         init_timer(&adapter->watchdog_timer);
 529         adapter->watchdog_timer.function = &e1000_watchdog;
 530         adapter->watchdog_timer.data = (unsigned long) adapter;
 531
 532         init_timer(&adapter->phy_info_timer);
 533         adapter->phy_info_timer.function = &e1000_update_phy_info;
 534         adapter->phy_info_timer.data = (unsigned long) adapter;
 535
 536         INIT_WORK(&adapter->tx_timeout_task,
 537                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 538
 539         if((err = register_netdev(netdev)))
 540                 goto err_register;
 541
 542         /* we're going to reset, so assume we have no link for now */
 543
 544         netif_carrier_off(netdev);
 545         netif_stop_queue(netdev);
 546
 547         printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Connection\n",
 548                netdev->name);
 549         e1000_check_options(adapter);
 550
 551         /* Initial Wake on LAN setting
 552          * If APM wake is enabled in the EEPROM,
 553          * enable the ACPI Magic Packet filter
 554          */
 555
 556         switch(adapter->hw.mac_type) {
 557         case e1000_82542_rev2_0:
 558         case e1000_82542_rev2_1:
 559         case e1000_82543:
 560                 break;
 561         case e1000_82546:
 562         case e1000_82546_rev_3:
 563                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 564                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 565                         e1000_read_eeprom(&adapter->hw,
 566                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 567                         break;
 568                 }
 569                 /* Fall Through */
 570         default:
 571                 e1000_read_eeprom(&adapter->hw,
 572                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 573                 break;
 574         }
 575         if(eeprom_data & E1000_EEPROM_APME)
 576                 adapter->wol |= E1000_WUFC_MAG;
 577
 578         /* reset the hardware with the new settings */
 579
 580         e1000_reset(adapter);
 581
 582         cards_found++;
 583         return 0;
 584
 585 err_register:
 586 err_sw_init:
 587 err_eeprom:
 588         iounmap(adapter->hw.hw_addr);
 589 err_ioremap:
 590         free_netdev(netdev);
 591 err_alloc_etherdev:
 592         pci_release_regions(pdev);
 593         return err;
 594 }
 595
 596 /**
 597  * e1000_remove - Device Removal Routine
 598  * @pdev: PCI device information struct
 599  *
 600  * e1000_remove is called by the PCI subsystem to alert the driver
 601  * that it should release a PCI device.  The could be caused by a
 602  * Hot-Plug event, or because the driver is going to be removed from
 603  * memory.
 604  **/
 605
 606 static void __devexit
 607 e1000_remove(struct pci_dev *pdev)
 608 {
 609         struct net_device *netdev = pci_get_drvdata(pdev);
 610         struct e1000_adapter *adapter = netdev->priv;
 611         uint32_t manc;
 612
 613         if(adapter->hw.mac_type >= e1000_82540 &&
 614            adapter->hw.media_type == e1000_media_type_copper) {
 615                 manc = E1000_READ_REG(&adapter->hw, MANC);
 616                 if(manc & E1000_MANC_SMBUS_EN) {
 617                         manc |= E1000_MANC_ARP_EN;
 618                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 619                 }
 620         }
 621
 622         unregister_netdev(netdev);
 623
 624         e1000_phy_hw_reset(&adapter->hw);
 625
 626         iounmap(adapter->hw.hw_addr);
 627         pci_release_regions(pdev);
 628
 629         free_netdev(netdev);
 630 }
 631
 632 /**
 633  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 634  * @adapter: board private structure to initialize
 635  *
 636  * e1000_sw_init initializes the Adapter private data structure.
 637  * Fields are initialized based on PCI device information and
 638  * OS network device settings (MTU size).
 639  **/
 640
 641 static int __devinit
 642 e1000_sw_init(struct e1000_adapter *adapter)
 643 {
 644         struct e1000_hw *hw = &adapter->hw;
 645         struct net_device *netdev = adapter->netdev;
 646         struct pci_dev *pdev = adapter->pdev;
 647
 648         /* PCI config space info */
 649
 650         hw->vendor_id = pdev->vendor;
 651         hw->device_id = pdev->device;
 652         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 653         hw->subsystem_id = pdev->subsystem_device;
 654
 655         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 656
 657         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 658
 659         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 660         hw->max_frame_size = netdev->mtu +
 661                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 662         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 663
 664         /* identify the MAC */
 665
 666         if (e1000_set_mac_type(hw)) {
 667                 E1000_ERR("Unknown MAC Type\n");
 668                 return -EIO;
 669         }
 670
 671         /* initialize eeprom parameters */
 672
 673         e1000_init_eeprom_params(hw);
 674
 675         if((hw->mac_type == e1000_82541) ||
 676            (hw->mac_type == e1000_82547) ||
 677            (hw->mac_type == e1000_82541_rev_2) ||
 678            (hw->mac_type == e1000_82547_rev_2))
 679                 hw->phy_init_script = 1;
 680
 681         e1000_set_media_type(hw);
 682
 683         if(hw->mac_type < e1000_82543)
 684                 hw->report_tx_early = 0;
 685         else
 686                 hw->report_tx_early = 1;
 687
 688         hw->wait_autoneg_complete = FALSE;
 689         hw->tbi_compatibility_en = TRUE;
 690         hw->adaptive_ifs = TRUE;
 691
 692         /* Copper options */
 693
 694         if(hw->media_type == e1000_media_type_copper) {
 695                 hw->mdix = AUTO_ALL_MODES;
 696                 hw->disable_polarity_correction = FALSE;
 697                 hw->master_slave = E1000_MASTER_SLAVE;
 698         }
 699
 700         atomic_set(&adapter->irq_sem, 1);
 701         spin_lock_init(&adapter->stats_lock);
 702         spin_lock_init(&adapter->tx_lock);
 703
 704         return 0;
 705 }
 706
 707 /**
 708  * e1000_open - Called when a network interface is made active
 709  * @netdev: network interface device structure
 710  *
 711  * Returns 0 on success, negative value on failure
 712  *
 713  * The open entry point is called when a network interface is made
 714  * active by the system (IFF_UP).  At this point all resources needed
 715  * for transmit and receive operations are allocated, the interrupt
 716  * handler is registered with the OS, the watchdog timer is started,
 717  * and the stack is notified that the interface is ready.
 718  **/
 719
 720 static int
 721 e1000_open(struct net_device *netdev)
 722 {
 723         struct e1000_adapter *adapter = netdev->priv;
 724         int err;
 725
 726         /* allocate transmit descriptors */
 727
 728         if((err = e1000_setup_tx_resources(adapter)))
 729                 goto err_setup_tx;
 730
 731         /* allocate receive descriptors */
 732
 733         if((err = e1000_setup_rx_resources(adapter)))
 734                 goto err_setup_rx;
 735
 736         if((err = e1000_up(adapter)))
 737                 goto err_up;
 738
 739         return 0;
 740
 741 err_up:
 742         e1000_free_rx_resources(adapter);
 743 err_setup_rx:
 744         e1000_free_tx_resources(adapter);
 745 err_setup_tx:
 746         e1000_reset(adapter);
 747
 748         return err;
 749 }
 750
 751 /**
 752  * e1000_close - Disables a network interface
 753  * @netdev: network interface device structure
 754  *
 755  * Returns 0, this is not allowed to fail
 756  *
 757  * The close entry point is called when an interface is de-activated
 758  * by the OS.  The hardware is still under the drivers control, but
 759  * needs to be disabled.  A global MAC reset is issued to stop the
 760  * hardware, and all transmit and receive resources are freed.
 761  **/
 762
 763 static int
 764 e1000_close(struct net_device *netdev)
 765 {
 766         struct e1000_adapter *adapter = netdev->priv;
 767
 768         e1000_down(adapter);
 769
 770         e1000_free_tx_resources(adapter);
 771         e1000_free_rx_resources(adapter);
 772
 773         return 0;
 774 }
 775
 776 /**
 777  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
 778  * @adapter: board private structure
 779  *
 780  * Return 0 on success, negative on failure
 781  **/
 782
 783 int
 784 e1000_setup_tx_resources(struct e1000_adapter *adapter)
 785 {
 786         struct e1000_desc_ring *txdr = &adapter->tx_ring;
 787         struct pci_dev *pdev = adapter->pdev;
 788         int size;
 789
 790         size = sizeof(struct e1000_buffer) * txdr->count;
 791         txdr->buffer_info = kmalloc(size, GFP_KERNEL);
 792         if(!txdr->buffer_info) {
 793                 return -ENOMEM;
 794         }
 795         memset(txdr->buffer_info, 0, size);
 796
 797         /* round up to nearest 4K */
 798
 799         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
 800         E1000_ROUNDUP(txdr->size, 4096);
 801
 802         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 803         if(!txdr->desc) {
 804                 kfree(txdr->buffer_info);
 805                 return -ENOMEM;
 806         }
 807         memset(txdr->desc, 0, txdr->size);
 808
 809         txdr->next_to_use = 0;
 810         txdr->next_to_clean = 0;
 811
 812         return 0;
 813 }
 814
 815 /**
 816  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
 817  * @adapter: board private structure
 818  *
 819  * Configure the Tx unit of the MAC after a reset.
 820  **/
 821
 822 static void
 823 e1000_configure_tx(struct e1000_adapter *adapter)
 824 {
 825         uint64_t tdba = adapter->tx_ring.dma;
 826         uint32_t tdlen = adapter->tx_ring.count * sizeof(struct e1000_tx_desc);
 827         uint32_t tctl, tipg;
 828
 829         E1000_WRITE_REG(&adapter->hw, TDBAL, (tdba & 0x00000000ffffffffULL));
 830         E1000_WRITE_REG(&adapter->hw, TDBAH, (tdba >> 32));
 831
 832         E1000_WRITE_REG(&adapter->hw, TDLEN, tdlen);
 833
 834         /* Setup the HW Tx Head and Tail descriptor pointers */
 835
 836         E1000_WRITE_REG(&adapter->hw, TDH, 0);
 837         E1000_WRITE_REG(&adapter->hw, TDT, 0);
 838
 839         /* Set the default values for the Tx Inter Packet Gap timer */
 840
 841         switch (adapter->hw.mac_type) {
 842         case e1000_82542_rev2_0:
 843         case e1000_82542_rev2_1:
 844                 tipg = DEFAULT_82542_TIPG_IPGT;
 845                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
 846                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
 847                 break;
 848         default:
 849                 if(adapter->hw.media_type == e1000_media_type_fiber ||
 850                    adapter->hw.media_type == e1000_media_type_internal_serdes)
 851                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
 852                 else
 853                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
 854                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
 855                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
 856         }
 857         E1000_WRITE_REG(&adapter->hw, TIPG, tipg);
 858
 859         /* Set the Tx Interrupt Delay register */
 860
 861         E1000_WRITE_REG(&adapter->hw, TIDV, adapter->tx_int_delay);
 862         if(adapter->hw.mac_type >= e1000_82540)
 863                 E1000_WRITE_REG(&adapter->hw, TADV, adapter->tx_abs_int_delay);
 864
 865         /* Program the Transmit Control Register */
 866
 867         tctl = E1000_READ_REG(&adapter->hw, TCTL);
 868
 869         tctl &= ~E1000_TCTL_CT;
 870         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP |
 871                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
 872
 873         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
 874
 875         e1000_config_collision_dist(&adapter->hw);
 876
 877         /* Setup Transmit Descriptor Settings for eop descriptor */
 878         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
 879                 E1000_TXD_CMD_IFCS;
 880
 881         if(adapter->hw.report_tx_early == 1)
 882                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
 883         else
 884                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
 885
 886         /* Cache if we're 82544 running in PCI-X because we'll
 887          * need this to apply a workaround later in the send path. */
 888         if(adapter->hw.mac_type == e1000_82544 &&
 889            adapter->hw.bus_type == e1000_bus_type_pcix)
 890                 adapter->pcix_82544 = 1;
 891 }
 892
 893 /**
 894  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
 895  * @adapter: board private structure
 896  *
 897  * Returns 0 on success, negative on failure
 898  **/
 899
 900 int
 901 e1000_setup_rx_resources(struct e1000_adapter *adapter)
 902 {
 903         struct e1000_desc_ring *rxdr = &adapter->rx_ring;
 904         struct pci_dev *pdev = adapter->pdev;
 905         int size;
 906
 907         size = sizeof(struct e1000_buffer) * rxdr->count;
 908         rxdr->buffer_info = kmalloc(size, GFP_KERNEL);
 909         if(!rxdr->buffer_info) {
 910                 return -ENOMEM;
 911         }
 912         memset(rxdr->buffer_info, 0, size);
 913
 914         /* Round up to nearest 4K */
 915
 916         rxdr->size = rxdr->count * sizeof(struct e1000_rx_desc);
 917         E1000_ROUNDUP(rxdr->size, 4096);
 918
 919         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
 920
 921         if(!rxdr->desc) {
 922                 kfree(rxdr->buffer_info);
 923                 return -ENOMEM;
 924         }
 925         memset(rxdr->desc, 0, rxdr->size);
 926
 927         rxdr->next_to_clean = 0;
 928         rxdr->next_to_use = 0;
 929
 930         return 0;
 931 }
 932
 933 /**
 934  * e1000_setup_rctl - configure the receive control register
 935  * @adapter: Board private structure
 936  **/
 937
 938 static void
 939 e1000_setup_rctl(struct e1000_adapter *adapter)
 940 {
 941         uint32_t rctl;
 942
 943         rctl = E1000_READ_REG(&adapter->hw, RCTL);
 944
 945         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
 946
 947         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
 948                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
 949                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
 950
 951         if(adapter->hw.tbi_compatibility_on == 1)
 952                 rctl |= E1000_RCTL_SBP;
 953         else
 954                 rctl &= ~E1000_RCTL_SBP;
 955
 956         rctl &= ~(E1000_RCTL_SZ_4096);
 957         switch (adapter->rx_buffer_len) {
 958         case E1000_RXBUFFER_2048:
 959         default:
 960                 rctl |= E1000_RCTL_SZ_2048;
 961                 rctl &= ~(E1000_RCTL_BSEX | E1000_RCTL_LPE);
 962                 break;
 963         case E1000_RXBUFFER_4096:
 964                 rctl |= E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
 965                 break;
 966         case E1000_RXBUFFER_8192:
 967                 rctl |= E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
 968                 break;
 969         case E1000_RXBUFFER_16384:
 970                 rctl |= E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
 971                 break;
 972         }
 973
 974         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
 975 }
 976
 977 /**
 978  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
 979  * @adapter: board private structure
 980  *
 981  * Configure the Rx unit of the MAC after a reset.
 982  **/
 983
 984 static void
 985 e1000_configure_rx(struct e1000_adapter *adapter)
 986 {
 987         uint64_t rdba = adapter->rx_ring.dma;
 988         uint32_t rdlen = adapter->rx_ring.count * sizeof(struct e1000_rx_desc);
 989         uint32_t rctl;
 990         uint32_t rxcsum;
 991
 992         /* make sure receives are disabled while setting up the descriptors */
 993
 994         rctl = E1000_READ_REG(&adapter->hw, RCTL);
 995         E1000_WRITE_REG(&adapter->hw, RCTL, rctl & ~E1000_RCTL_EN);
 996
 997         /* set the Receive Delay Timer Register */
 998
 999         E1000_WRITE_REG(&adapter->hw, RDTR, adapter->rx_int_delay);
1000
1001         if(adapter->hw.mac_type >= e1000_82540) {
1002                 E1000_WRITE_REG(&adapter->hw, RADV, adapter->rx_abs_int_delay);
1003                 if(adapter->itr > 1)
1004                         E1000_WRITE_REG(&adapter->hw, ITR,
1005                                 1000000000 / (adapter->itr * 256));
1006         }
1007
1008         /* Setup the Base and Length of the Rx Descriptor Ring */
1009
1010         E1000_WRITE_REG(&adapter->hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1011         E1000_WRITE_REG(&adapter->hw, RDBAH, (rdba >> 32));
1012
1013         E1000_WRITE_REG(&adapter->hw, RDLEN, rdlen);
1014
1015         /* Setup the HW Rx Head and Tail Descriptor Pointers */
1016         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1017         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1018
1019         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1020         if((adapter->hw.mac_type >= e1000_82543) &&
1021            (adapter->rx_csum == TRUE)) {
1022                 rxcsum = E1000_READ_REG(&adapter->hw, RXCSUM);
1023                 rxcsum |= E1000_RXCSUM_TUOFL;
1024                 E1000_WRITE_REG(&adapter->hw, RXCSUM, rxcsum);
1025         }
1026
1027         /* Enable Receives */
1028
1029         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1030 }
1031
1032 /**
1033  * e1000_free_tx_resources - Free Tx Resources
1034  * @adapter: board private structure
1035  *
1036  * Free all transmit software resources
1037  **/
1038
1039 void
1040 e1000_free_tx_resources(struct e1000_adapter *adapter)
1041 {
1042         struct pci_dev *pdev = adapter->pdev;
1043
1044         e1000_clean_tx_ring(adapter);
1045
1046         kfree(adapter->tx_ring.buffer_info);
1047         adapter->tx_ring.buffer_info = NULL;
1048
1049         pci_free_consistent(pdev, adapter->tx_ring.size,
1050                             adapter->tx_ring.desc, adapter->tx_ring.dma);
1051
1052         adapter->tx_ring.desc = NULL;
1053 }
1054
1055 /**
1056  * e1000_clean_tx_ring - Free Tx Buffers
1057  * @adapter: board private structure
1058  **/
1059
1060 static void
1061 e1000_clean_tx_ring(struct e1000_adapter *adapter)
1062 {
1063         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1064         struct e1000_buffer *buffer_info;
1065         struct pci_dev *pdev = adapter->pdev;
1066         unsigned long size;
1067         unsigned int i;
1068
1069         /* Free all the Tx ring sk_buffs */
1070
1071         for(i = 0; i < tx_ring->count; i++) {
1072                 buffer_info = &tx_ring->buffer_info[i];
1073                 if(buffer_info->skb) {
1074
1075                         pci_unmap_page(pdev,
1076                                        buffer_info->dma,
1077                                        buffer_info->length,
1078                                        PCI_DMA_TODEVICE);
1079
1080                         dev_kfree_skb(buffer_info->skb);
1081
1082                         buffer_info->skb = NULL;
1083                 }
1084         }
1085
1086         size = sizeof(struct e1000_buffer) * tx_ring->count;
1087         memset(tx_ring->buffer_info, 0, size);
1088
1089         /* Zero out the descriptor ring */
1090
1091         memset(tx_ring->desc, 0, tx_ring->size);
1092
1093         tx_ring->next_to_use = 0;
1094         tx_ring->next_to_clean = 0;
1095
1096         E1000_WRITE_REG(&adapter->hw, TDH, 0);
1097         E1000_WRITE_REG(&adapter->hw, TDT, 0);
1098 }
1099
1100 /**
1101  * e1000_free_rx_resources - Free Rx Resources
1102  * @adapter: board private structure
1103  *
1104  * Free all receive software resources
1105  **/
1106
1107 void
1108 e1000_free_rx_resources(struct e1000_adapter *adapter)
1109 {
1110         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1111         struct pci_dev *pdev = adapter->pdev;
1112
1113         e1000_clean_rx_ring(adapter);
1114
1115         kfree(rx_ring->buffer_info);
1116         rx_ring->buffer_info = NULL;
1117
1118         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1119
1120         rx_ring->desc = NULL;
1121 }
1122
1123 /**
1124  * e1000_clean_rx_ring - Free Rx Buffers
1125  * @adapter: board private structure
1126  **/
1127
1128 static void
1129 e1000_clean_rx_ring(struct e1000_adapter *adapter)
1130 {
1131         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1132         struct e1000_buffer *buffer_info;
1133         struct pci_dev *pdev = adapter->pdev;
1134         unsigned long size;
1135         unsigned int i;
1136
1137         /* Free all the Rx ring sk_buffs */
1138
1139         for(i = 0; i < rx_ring->count; i++) {
1140                 buffer_info = &rx_ring->buffer_info[i];
1141                 if(buffer_info->skb) {
1142
1143                         pci_unmap_single(pdev,
1144                                          buffer_info->dma,
1145                                          buffer_info->length,
1146                                          PCI_DMA_FROMDEVICE);
1147
1148                         dev_kfree_skb(buffer_info->skb);
1149
1150                         buffer_info->skb = NULL;
1151                 }
1152         }
1153
1154         size = sizeof(struct e1000_buffer) * rx_ring->count;
1155         memset(rx_ring->buffer_info, 0, size);
1156
1157         /* Zero out the descriptor ring */
1158
1159         memset(rx_ring->desc, 0, rx_ring->size);
1160
1161         rx_ring->next_to_clean = 0;
1162         rx_ring->next_to_use = 0;
1163
1164         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1165         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1166 }
1167
1168 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1169  * and memory write and invalidate disabled for certain operations
1170  */
1171 static void
1172 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1173 {
1174         struct net_device *netdev = adapter->netdev;
1175         uint32_t rctl;
1176
1177         e1000_pci_clear_mwi(&adapter->hw);
1178
1179         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1180         rctl |= E1000_RCTL_RST;
1181         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1182         E1000_WRITE_FLUSH(&adapter->hw);
1183         mdelay(5);
1184
1185         if(netif_running(netdev))
1186                 e1000_clean_rx_ring(adapter);
1187 }
1188
1189 static void
1190 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1191 {
1192         struct net_device *netdev = adapter->netdev;
1193         uint32_t rctl;
1194
1195         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1196         rctl &= ~E1000_RCTL_RST;
1197         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1198         E1000_WRITE_FLUSH(&adapter->hw);
1199         mdelay(5);
1200
1201         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1202                 e1000_pci_set_mwi(&adapter->hw);
1203
1204         if(netif_running(netdev)) {
1205                 e1000_configure_rx(adapter);
1206                 e1000_alloc_rx_buffers(adapter);
1207         }
1208 }
1209
1210 /**
1211  * e1000_set_mac - Change the Ethernet Address of the NIC
1212  * @netdev: network interface device structure
1213  * @p: pointer to an address structure
1214  *
1215  * Returns 0 on success, negative on failure
1216  **/
1217
1218 static int
1219 e1000_set_mac(struct net_device *netdev, void *p)
1220 {
1221         struct e1000_adapter *adapter = netdev->priv;
1222         struct sockaddr *addr = p;
1223
1224         if(!is_valid_ether_addr(addr->sa_data))
1225                 return -EADDRNOTAVAIL;
1226
1227         /* 82542 2.0 needs to be in reset to write receive address registers */
1228
1229         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1230                 e1000_enter_82542_rst(adapter);
1231
1232         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1233         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1234
1235         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
1236
1237         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1238                 e1000_leave_82542_rst(adapter);
1239
1240         return 0;
1241 }
1242
1243 /**
1244  * e1000_set_multi - Multicast and Promiscuous mode set
1245  * @netdev: network interface device structure
1246  *
1247  * The set_multi entry point is called whenever the multicast address
1248  * list or the network interface flags are updated.  This routine is
1249  * responsible for configuring the hardware for proper multicast,
1250  * promiscuous mode, and all-multi behavior.
1251  **/
1252
1253 static void
1254 e1000_set_multi(struct net_device *netdev)
1255 {
1256         struct e1000_adapter *adapter = netdev->priv;
1257         struct e1000_hw *hw = &adapter->hw;
1258         struct dev_mc_list *mc_ptr;
1259         uint32_t rctl;
1260         uint32_t hash_value;
1261         int i;
1262
1263         /* Check for Promiscuous and All Multicast modes */
1264
1265         rctl = E1000_READ_REG(hw, RCTL);
1266
1267         if(netdev->flags & IFF_PROMISC) {
1268                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
1269         } else if(netdev->flags & IFF_ALLMULTI) {
1270                 rctl |= E1000_RCTL_MPE;
1271                 rctl &= ~E1000_RCTL_UPE;
1272         } else {
1273                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
1274         }
1275
1276         E1000_WRITE_REG(hw, RCTL, rctl);
1277
1278         /* 82542 2.0 needs to be in reset to write receive address registers */
1279
1280         if(hw->mac_type == e1000_82542_rev2_0)
1281                 e1000_enter_82542_rst(adapter);
1282
1283         /* load the first 14 multicast address into the exact filters 1-14
1284          * RAR 0 is used for the station MAC adddress
1285          * if there are not 14 addresses, go ahead and clear the filters
1286          */
1287         mc_ptr = netdev->mc_list;
1288
1289         for(i = 1; i < E1000_RAR_ENTRIES; i++) {
1290                 if(mc_ptr) {
1291                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
1292                         mc_ptr = mc_ptr->next;
1293                 } else {
1294                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
1295                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
1296                 }
1297         }
1298
1299         /* clear the old settings from the multicast hash table */
1300
1301         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
1302                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
1303
1304         /* load any remaining addresses into the hash table */
1305
1306         for(; mc_ptr; mc_ptr = mc_ptr->next) {
1307                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
1308                 e1000_mta_set(hw, hash_value);
1309         }
1310
1311         if(hw->mac_type == e1000_82542_rev2_0)
1312                 e1000_leave_82542_rst(adapter);
1313 }
1314
1315 /* need to wait a few seconds after link up to get diagnostic information from the phy */
1316
1317 static void
1318 e1000_update_phy_info(unsigned long data)
1319 {
1320         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1321         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
1322 }
1323
1324 /**
1325  * e1000_82547_tx_fifo_stall - Timer Call-back
1326  * @data: pointer to adapter cast into an unsigned long
1327  **/
1328
1329 static void
1330 e1000_82547_tx_fifo_stall(unsigned long data)
1331 {
1332         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1333         struct net_device *netdev = adapter->netdev;
1334         uint32_t tctl;
1335
1336         if(atomic_read(&adapter->tx_fifo_stall)) {
1337                 if((E1000_READ_REG(&adapter->hw, TDT) ==
1338                     E1000_READ_REG(&adapter->hw, TDH)) &&
1339                    (E1000_READ_REG(&adapter->hw, TDFT) ==
1340                     E1000_READ_REG(&adapter->hw, TDFH)) &&
1341                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
1342                     E1000_READ_REG(&adapter->hw, TDFHS))) {
1343                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
1344                         E1000_WRITE_REG(&adapter->hw, TCTL,
1345                                         tctl & ~E1000_TCTL_EN);
1346                         E1000_WRITE_REG(&adapter->hw, TDFT,
1347                                         adapter->tx_head_addr);
1348                         E1000_WRITE_REG(&adapter->hw, TDFH,
1349                                         adapter->tx_head_addr);
1350                         E1000_WRITE_REG(&adapter->hw, TDFTS,
1351                                         adapter->tx_head_addr);
1352                         E1000_WRITE_REG(&adapter->hw, TDFHS,
1353                                         adapter->tx_head_addr);
1354                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1355                         E1000_WRITE_FLUSH(&adapter->hw);
1356
1357                         adapter->tx_fifo_head = 0;
1358                         atomic_set(&adapter->tx_fifo_stall, 0);
1359                         netif_wake_queue(netdev);
1360                 } else {
1361                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
1362                 }
1363         }
1364 }
1365
1366 /**
1367  * e1000_watchdog - Timer Call-back
1368  * @data: pointer to netdev cast into an unsigned long
1369  **/
1370
1371 static void
1372 e1000_watchdog(unsigned long data)
1373 {
1374         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1375         struct net_device *netdev = adapter->netdev;
1376         struct e1000_desc_ring *txdr = &adapter->tx_ring;
1377         unsigned int i;
1378         uint32_t link;
1379
1380         e1000_check_for_link(&adapter->hw);
1381
1382         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1383            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
1384                 link = !adapter->hw.serdes_link_down;
1385         else
1386                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
1387
1388         if(link) {
1389                 if(!netif_carrier_ok(netdev)) {
1390                         e1000_get_speed_and_duplex(&adapter->hw,
1391                                                    &adapter->link_speed,
1392                                                    &adapter->link_duplex);
1393
1394                         printk(KERN_INFO
1395                                "e1000: %s NIC Link is Up %d Mbps %s\n",
1396                                netdev->name, adapter->link_speed,
1397                                adapter->link_duplex == FULL_DUPLEX ?
1398                                "Full Duplex" : "Half Duplex");
1399
1400                         netif_carrier_on(netdev);
1401                         netif_wake_queue(netdev);
1402                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1403                         adapter->smartspeed = 0;
1404                 }
1405         } else {
1406                 if(netif_carrier_ok(netdev)) {
1407                         adapter->link_speed = 0;
1408                         adapter->link_duplex = 0;
1409                         printk(KERN_INFO
1410                                "e1000: %s NIC Link is Down\n",
1411                                netdev->name);
1412                         netif_carrier_off(netdev);
1413                         netif_stop_queue(netdev);
1414                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1415                 }
1416
1417                 e1000_smartspeed(adapter);
1418         }
1419
1420         e1000_update_stats(adapter);
1421
1422         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
1423         adapter->tpt_old = adapter->stats.tpt;
1424         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
1425         adapter->colc_old = adapter->stats.colc;
1426
1427         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
1428         adapter->gorcl_old = adapter->stats.gorcl;
1429         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
1430         adapter->gotcl_old = adapter->stats.gotcl;
1431
1432         e1000_update_adaptive(&adapter->hw);
1433
1434         if(!netif_carrier_ok(netdev)) {
1435                 if(E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1436                         /* We've lost link, so the controller stops DMA,
1437                          * but we've got queued Tx work that's never going
1438                          * to get done, so reset controller to flush Tx.
1439                          * (Do the reset outside of interrupt context). */
1440                         schedule_work(&adapter->tx_timeout_task);
1441                 }
1442         }
1443
1444         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
1445         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
1446                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
1447                  * asymmetrical Tx or Rx gets ITR=8000; everyone
1448                  * else is between 2000-8000. */
1449                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
1450                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
1451                         adapter->gotcl - adapter->gorcl :
1452                         adapter->gorcl - adapter->gotcl) / 10000;
1453                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
1454                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
1455         }
1456
1457         /* Cause software interrupt to ensure rx ring is cleaned */
1458         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
1459
1460         /* Early detection of hung controller */
1461         i = txdr->next_to_clean;
1462         if(txdr->buffer_info[i].dma &&
1463            time_after(jiffies, txdr->buffer_info[i].time_stamp + HZ) &&
1464            !(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_TXOFF))
1465                 netif_stop_queue(netdev);
1466
1467         /* Reset the timer */
1468         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1469 }
1470
1471 #define E1000_TX_FLAGS_CSUM             0x00000001
1472 #define E1000_TX_FLAGS_VLAN             0x00000002
1473 #define E1000_TX_FLAGS_TSO              0x00000004
1474 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
1475 #define E1000_TX_FLAGS_VLAN_SHIFT       16
1476
1477 static inline boolean_t
1478 e1000_tso(struct e1000_adapter *adapter, struct sk_buff *skb)
1479 {
1480 #ifdef NETIF_F_TSO
1481         struct e1000_context_desc *context_desc;
1482         unsigned int i;
1483         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1484         uint16_t ipcse, tucse, mss;
1485
1486         if(skb_shinfo(skb)->tso_size) {
1487                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1488                 mss = skb_shinfo(skb)->tso_size;
1489                 skb->nh.iph->tot_len = 0;
1490                 skb->nh.iph->check = 0;
1491                 skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
1492                                                       skb->nh.iph->daddr,
1493                                                       0,
1494                                                       IPPROTO_TCP,
1495                                                       0);
1496                 ipcss = skb->nh.raw - skb->data;
1497                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1498                 ipcse = skb->h.raw - skb->data - 1;
1499                 tucss = skb->h.raw - skb->data;
1500                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1501                 tucse = 0;
1502
1503                 i = adapter->tx_ring.next_to_use;
1504                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1505
1506                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
1507                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
1508                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
1509                 context_desc->upper_setup.tcp_fields.tucss = tucss;
1510                 context_desc->upper_setup.tcp_fields.tucso = tucso;
1511                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
1512                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
1513                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
1514                 context_desc->cmd_and_length = cpu_to_le32(
1515                         E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
1516                         E1000_TXD_CMD_IP | E1000_TXD_CMD_TCP |
1517                         (skb->len - (hdr_len)));
1518
1519                 if(++i == adapter->tx_ring.count) i = 0;
1520                 adapter->tx_ring.next_to_use = i;
1521
1522                 return TRUE;
1523         }
1524 #endif
1525
1526         return FALSE;
1527 }
1528
1529 static inline boolean_t
1530 e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
1531 {
1532         struct e1000_context_desc *context_desc;
1533         unsigned int i;
1534         uint8_t css, cso;
1535
1536         if(skb->ip_summed == CHECKSUM_HW) {
1537                 css = skb->h.raw - skb->data;
1538                 cso = (skb->h.raw + skb->csum) - skb->data;
1539
1540                 i = adapter->tx_ring.next_to_use;
1541                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1542
1543                 context_desc->upper_setup.tcp_fields.tucss = css;
1544                 context_desc->upper_setup.tcp_fields.tucso = cso;
1545                 context_desc->upper_setup.tcp_fields.tucse = 0;
1546                 context_desc->tcp_seg_setup.data = 0;
1547                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
1548
1549                 if(++i == adapter->tx_ring.count) i = 0;
1550                 adapter->tx_ring.next_to_use = i;
1551
1552                 return TRUE;
1553         }
1554
1555         return FALSE;
1556 }
1557
1558 #define E1000_MAX_TXD_PWR       12
1559 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
1560
1561 static inline int
1562 e1000_tx_map(struct e1000_adapter *adapter, struct sk_buff *skb,
1563         unsigned int first)
1564 {
1565         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1566         struct e1000_tx_desc *tx_desc;
1567         struct e1000_buffer *buffer_info;
1568         unsigned int len = skb->len, max_per_txd = E1000_MAX_DATA_PER_TXD;
1569         unsigned int offset = 0, size, count = 0, i;
1570 #ifdef NETIF_F_TSO
1571         unsigned int mss;
1572 #endif
1573         unsigned int nr_frags;
1574         unsigned int f;
1575
1576 #ifdef NETIF_F_TSO
1577         mss = skb_shinfo(skb)->tso_size;
1578         /* The controller does a simple calculation to
1579          * make sure there is enough room in the FIFO before
1580          * initiating the DMA for each buffer.  The calc is:
1581          * 4 = ceil(buffer len/mss).  To make sure we don't
1582          * overrun the FIFO, adjust the max buffer len if mss
1583          * drops. */
1584         if(mss)
1585                 max_per_txd = min(mss << 2, max_per_txd);
1586 #endif
1587         nr_frags = skb_shinfo(skb)->nr_frags;
1588         len -= skb->data_len;
1589
1590         i = tx_ring->next_to_use;
1591
1592         while(len) {
1593                 buffer_info = &tx_ring->buffer_info[i];
1594                 size = min(len, max_per_txd);
1595 #ifdef NETIF_F_TSO
1596                 /* Workaround for premature desc write-backs
1597                  * in TSO mode.  Append 4-byte sentinel desc */
1598                 if(mss && !nr_frags && size == len && size > 8)
1599                         size -= 4;
1600 #endif
1601                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
1602                  * terminating buffers within evenly-aligned dwords. */
1603                 if(adapter->pcix_82544 &&
1604                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
1605                    size > 4)
1606                         size -= 4;
1607
1608                 buffer_info->length = size;
1609                 buffer_info->dma =
1610                         pci_map_single(adapter->pdev,
1611                                 skb->data + offset,
1612                                 size,
1613                                 PCI_DMA_TODEVICE);
1614                 buffer_info->time_stamp = jiffies;
1615
1616                 len -= size;
1617                 offset += size;
1618                 count++;
1619                 if(++i == tx_ring->count) i = 0;
1620         }
1621
1622         for(f = 0; f < nr_frags; f++) {
1623                 struct skb_frag_struct *frag;
1624
1625                 frag = &skb_shinfo(skb)->frags[f];
1626                 len = frag->size;
1627                 offset = frag->page_offset;
1628
1629                 while(len) {
1630                         buffer_info = &tx_ring->buffer_info[i];
1631                         size = min(len, max_per_txd);
1632 #ifdef NETIF_F_TSO
1633                         /* Workaround for premature desc write-backs
1634                          * in TSO mode.  Append 4-byte sentinel desc */
1635                         if(mss && f == (nr_frags-1) && size == len && size > 8)
1636                                 size -= 4;
1637 #endif
1638                         /* Workaround for potential 82544 hang in PCI-X.
1639                          * Avoid terminating buffers within evenly-aligned
1640                          * dwords. */
1641                         if(adapter->pcix_82544 &&
1642                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
1643                            size > 4)
1644                                 size -= 4;
1645
1646                         buffer_info->length = size;
1647                         buffer_info->dma =
1648                                 pci_map_page(adapter->pdev,
1649                                         frag->page,
1650                                         offset,
1651                                         size,
1652                                         PCI_DMA_TODEVICE);
1653                         buffer_info->time_stamp = jiffies;
1654
1655                         len -= size;
1656                         offset += size;
1657                         count++;
1658                         if(++i == tx_ring->count) i = 0;
1659                 }
1660         }
1661
1662         if(E1000_DESC_UNUSED(&adapter->tx_ring) < count + 2) {
1663
1664                 /* There aren't enough descriptors available to queue up
1665                  * this send (need: count + 1 context desc + 1 desc gap
1666                  * to keep tail from touching head), so undo the mapping
1667                  * and abort the send.  We could have done the check before
1668                  * we mapped the skb, but because of all the workarounds
1669                  * (above), it's too difficult to predict how many we're
1670                  * going to need.*/
1671                 i = tx_ring->next_to_use;
1672
1673                 if(i == first) {
1674                         /* Cleanup after e1000_tx_[csum|tso] scribbling
1675                          * on descriptors. */
1676                         tx_desc = E1000_TX_DESC(*tx_ring, first);
1677                         tx_desc->buffer_addr = 0;
1678                         tx_desc->lower.data = 0;
1679                         tx_desc->upper.data = 0;
1680                 }
1681
1682                 while(count--) {
1683                         buffer_info = &tx_ring->buffer_info[i];
1684
1685                         if(buffer_info->dma) {
1686                                 pci_unmap_page(adapter->pdev,
1687                                                buffer_info->dma,
1688                                                buffer_info->length,
1689                                                PCI_DMA_TODEVICE);
1690                                 buffer_info->dma = 0;
1691                         }
1692
1693                         if(++i == tx_ring->count) i = 0;
1694                 }
1695
1696                 tx_ring->next_to_use = first;
1697
1698                 return 0;
1699         }
1700
1701         i = (i == 0) ? tx_ring->count - 1 : i - 1;
1702         tx_ring->buffer_info[i].skb = skb;
1703         tx_ring->buffer_info[first].next_to_watch = i;
1704
1705         return count;
1706 }
1707
1708 static inline void
1709 e1000_tx_queue(struct e1000_adapter *adapter, int count, int tx_flags)
1710 {
1711         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1712         struct e1000_tx_desc *tx_desc = NULL;
1713         struct e1000_buffer *buffer_info;
1714         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
1715         unsigned int i;
1716
1717         if(tx_flags & E1000_TX_FLAGS_TSO) {
1718                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
1719                              E1000_TXD_CMD_TSE;
1720                 txd_upper |= (E1000_TXD_POPTS_IXSM | E1000_TXD_POPTS_TXSM) << 8;
1721         }
1722
1723         if(tx_flags & E1000_TX_FLAGS_CSUM) {
1724                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
1725                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
1726         }
1727
1728         if(tx_flags & E1000_TX_FLAGS_VLAN) {
1729                 txd_lower |= E1000_TXD_CMD_VLE;
1730                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
1731         }
1732
1733         i = tx_ring->next_to_use;
1734
1735         while(count--) {
1736                 buffer_info = &tx_ring->buffer_info[i];
1737                 tx_desc = E1000_TX_DESC(*tx_ring, i);
1738                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1739                 tx_desc->lower.data =
1740                         cpu_to_le32(txd_lower | buffer_info->length);
1741                 tx_desc->upper.data = cpu_to_le32(txd_upper);
1742                 if(++i == tx_ring->count) i = 0;
1743         }
1744
1745         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
1746
1747         /* Force memory writes to complete before letting h/w
1748          * know there are new descriptors to fetch.  (Only
1749          * applicable for weak-ordered memory model archs,
1750          * such as IA-64). */
1751         wmb();
1752
1753         tx_ring->next_to_use = i;
1754         E1000_WRITE_REG(&adapter->hw, TDT, i);
1755 }
1756
1757 /**
1758  * 82547 workaround to avoid controller hang in half-duplex environment.
1759  * The workaround is to avoid queuing a large packet that would span
1760  * the internal Tx FIFO ring boundary by notifying the stack to resend
1761  * the packet at a later time.  This gives the Tx FIFO an opportunity to
1762  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
1763  * to the beginning of the Tx FIFO.
1764  **/
1765
1766 #define E1000_FIFO_HDR                  0x10
1767 #define E1000_82547_PAD_LEN             0x3E0
1768
1769 static inline int
1770 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
1771 {
1772         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
1773         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
1774
1775         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
1776
1777         if(adapter->link_duplex != HALF_DUPLEX)
1778                 goto no_fifo_stall_required;
1779
1780         if(atomic_read(&adapter->tx_fifo_stall))
1781                 return 1;
1782
1783         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
1784                 atomic_set(&adapter->tx_fifo_stall, 1);
1785                 return 1;
1786         }
1787
1788 no_fifo_stall_required:
1789         adapter->tx_fifo_head += skb_fifo_len;
1790         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
1791                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
1792         return 0;
1793 }
1794
1795 static int
1796 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1797 {
1798         struct e1000_adapter *adapter = netdev->priv;
1799         unsigned int first;
1800         unsigned int tx_flags = 0;
1801         unsigned long flags;
1802         int count;
1803
1804         if(skb->len <= 0) {
1805                 dev_kfree_skb_any(skb);
1806                 return 0;
1807         }
1808
1809         spin_lock_irqsave(&adapter->tx_lock, flags);
1810
1811         if(adapter->hw.mac_type == e1000_82547) {
1812                 if(e1000_82547_fifo_workaround(adapter, skb)) {
1813                         netif_stop_queue(netdev);
1814                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
1815                         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1816                         return 1;
1817                 }
1818         }
1819
1820         if(adapter->vlgrp && vlan_tx_tag_present(skb)) {
1821                 tx_flags |= E1000_TX_FLAGS_VLAN;
1822                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
1823         }
1824
1825         first = adapter->tx_ring.next_to_use;
1826
1827         if(e1000_tso(adapter, skb))
1828                 tx_flags |= E1000_TX_FLAGS_TSO;
1829         else if(e1000_tx_csum(adapter, skb))
1830                 tx_flags |= E1000_TX_FLAGS_CSUM;
1831
1832         if((count = e1000_tx_map(adapter, skb, first)))
1833                 e1000_tx_queue(adapter, count, tx_flags);
1834         else {
1835                 netif_stop_queue(netdev);
1836                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
1837                 return 1;
1838         }
1839
1840         netdev->trans_start = jiffies;
1841
1842         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1843
1844         return 0;
1845 }
1846
1847 /**
1848  * e1000_tx_timeout - Respond to a Tx Hang
1849  * @netdev: network interface device structure
1850  **/
1851
1852 static void
1853 e1000_tx_timeout(struct net_device *netdev)
1854 {
1855         struct e1000_adapter *adapter = netdev->priv;
1856
1857         /* Do the reset outside of interrupt context */
1858         schedule_work(&adapter->tx_timeout_task);
1859 }
1860
1861 static void
1862 e1000_tx_timeout_task(struct net_device *netdev)
1863 {
1864         struct e1000_adapter *adapter = netdev->priv;
1865
1866         netif_device_detach(netdev);
1867         e1000_down(adapter);
1868         e1000_up(adapter);
1869         netif_device_attach(netdev);
1870 }
1871
1872 /**
1873  * e1000_get_stats - Get System Network Statistics
1874  * @netdev: network interface device structure
1875  *
1876  * Returns the address of the device statistics structure.
1877  * The statistics are actually updated from the timer callback.
1878  **/
1879
1880 static struct net_device_stats *
1881 e1000_get_stats(struct net_device *netdev)
1882 {
1883         struct e1000_adapter *adapter = netdev->priv;
1884
1885         e1000_update_stats(adapter);
1886         return &adapter->net_stats;
1887 }
1888
1889 /**
1890  * e1000_change_mtu - Change the Maximum Transfer Unit
1891  * @netdev: network interface device structure
1892  * @new_mtu: new value for maximum frame size
1893  *
1894  * Returns 0 on success, negative on failure
1895  **/
1896
1897 static int
1898 e1000_change_mtu(struct net_device *netdev, int new_mtu)
1899 {
1900         struct e1000_adapter *adapter = netdev->priv;
1901         int old_mtu = adapter->rx_buffer_len;
1902         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1903
1904         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
1905            (max_frame > MAX_JUMBO_FRAME_SIZE)) {
1906                 E1000_ERR("Invalid MTU setting\n");
1907                 return -EINVAL;
1908         }
1909
1910         if(max_frame <= MAXIMUM_ETHERNET_FRAME_SIZE) {
1911                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
1912
1913         } else if(adapter->hw.mac_type < e1000_82543) {
1914                 E1000_ERR("Jumbo Frames not supported on 82542\n");
1915                 return -EINVAL;
1916
1917         } else if(max_frame <= E1000_RXBUFFER_4096) {
1918                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
1919
1920         } else if(max_frame <= E1000_RXBUFFER_8192) {
1921                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
1922
1923         } else {
1924                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
1925         }
1926
1927         if(old_mtu != adapter->rx_buffer_len && netif_running(netdev)) {
1928
1929                 e1000_down(adapter);
1930                 e1000_up(adapter);
1931         }
1932
1933         netdev->mtu = new_mtu;
1934         adapter->hw.max_frame_size = max_frame;
1935
1936         return 0;
1937 }
1938
1939 /**
1940  * e1000_update_stats - Update the board statistics counters
1941  * @adapter: board private structure
1942  **/
1943
1944 void
1945 e1000_update_stats(struct e1000_adapter *adapter)
1946 {
1947         struct e1000_hw *hw = &adapter->hw;
1948         unsigned long flags;
1949         uint16_t phy_tmp;
1950
1951 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
1952
1953         spin_lock_irqsave(&adapter->stats_lock, flags);
1954
1955         /* these counters are modified from e1000_adjust_tbi_stats,
1956          * called from the interrupt context, so they must only
1957          * be written while holding adapter->stats_lock
1958          */
1959
1960         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
1961         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
1962         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
1963         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
1964         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
1965         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
1966         adapter->stats.roc += E1000_READ_REG(hw, ROC);
1967         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
1968         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
1969         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
1970         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
1971         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
1972         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
1973
1974         /* the rest of the counters are only modified here */
1975
1976         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
1977         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
1978         adapter->stats.scc += E1000_READ_REG(hw, SCC);
1979         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
1980         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
1981         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
1982         adapter->stats.dc += E1000_READ_REG(hw, DC);
1983         adapter->stats.sec += E1000_READ_REG(hw, SEC);
1984         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
1985         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
1986         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
1987         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
1988         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
1989         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
1990         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
1991         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
1992         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
1993         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
1994         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
1995         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
1996         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
1997         adapter->stats.torl += E1000_READ_REG(hw, TORL);
1998         adapter->stats.torh += E1000_READ_REG(hw, TORH);
1999         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2000         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2001         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2002         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2003         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2004         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2005         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2006         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2007         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2008         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2009         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2010
2011         /* used for adaptive IFS */
2012
2013         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
2014         adapter->stats.tpt += hw->tx_packet_delta;
2015         hw->collision_delta = E1000_READ_REG(hw, COLC);
2016         adapter->stats.colc += hw->collision_delta;
2017
2018         if(hw->mac_type >= e1000_82543) {
2019                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
2020                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
2021                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
2022                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
2023                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
2024                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
2025         }
2026
2027         /* Fill out the OS statistics structure */
2028
2029         adapter->net_stats.rx_packets = adapter->stats.gprc;
2030         adapter->net_stats.tx_packets = adapter->stats.gptc;
2031         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
2032         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
2033         adapter->net_stats.multicast = adapter->stats.mprc;
2034         adapter->net_stats.collisions = adapter->stats.colc;
2035
2036         /* Rx Errors */
2037
2038         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
2039                 adapter->stats.crcerrs + adapter->stats.algnerrc +
2040                 adapter->stats.rlec + adapter->stats.rnbc +
2041                 adapter->stats.mpc + adapter->stats.cexterr;
2042         adapter->net_stats.rx_dropped = adapter->stats.rnbc;
2043         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2044         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2045         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
2046         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
2047         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
2048
2049         /* Tx Errors */
2050
2051         adapter->net_stats.tx_errors = adapter->stats.ecol +
2052                                        adapter->stats.latecol;
2053         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
2054         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
2055         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
2056
2057         /* Tx Dropped needs to be maintained elsewhere */
2058
2059         /* Phy Stats */
2060
2061         if(hw->media_type == e1000_media_type_copper) {
2062                 if((adapter->link_speed == SPEED_1000) &&
2063                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
2064                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
2065                         adapter->phy_stats.idle_errors += phy_tmp;
2066                 }
2067
2068                 if((hw->mac_type <= e1000_82546) &&
2069                    (hw->phy_type == e1000_phy_m88) &&
2070                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
2071                         adapter->phy_stats.receive_errors += phy_tmp;
2072         }
2073
2074         spin_unlock_irqrestore(&adapter->stats_lock, flags);
2075 }
2076
2077 /**
2078  * e1000_irq_disable - Mask off interrupt generation on the NIC
2079  * @adapter: board private structure
2080  **/
2081
2082 static inline void
2083 e1000_irq_disable(struct e1000_adapter *adapter)
2084 {
2085         atomic_inc(&adapter->irq_sem);
2086         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
2087         E1000_WRITE_FLUSH(&adapter->hw);
2088         synchronize_irq(adapter->pdev->irq);
2089 }
2090
2091 /**
2092  * e1000_irq_enable - Enable default interrupt generation settings
2093  * @adapter: board private structure
2094  **/
2095
2096 static inline void
2097 e1000_irq_enable(struct e1000_adapter *adapter)
2098 {
2099         if(atomic_dec_and_test(&adapter->irq_sem)) {
2100                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
2101                 E1000_WRITE_FLUSH(&adapter->hw);
2102         }
2103 }
2104
2105 /**
2106  * e1000_intr - Interrupt Handler
2107  * @irq: interrupt number
2108  * @data: pointer to a network interface device structure
2109  * @pt_regs: CPU registers structure
2110  **/
2111
2112 static irqreturn_t
2113 e1000_intr(int irq, void *data, struct pt_regs *regs)
2114 {
2115         struct net_device *netdev = data;
2116         struct e1000_adapter *adapter = netdev->priv;
2117         struct e1000_hw *hw = &adapter->hw;
2118         uint32_t icr = E1000_READ_REG(&adapter->hw, ICR);
2119 #ifndef CONFIG_E1000_NAPI
2120         unsigned int i;
2121 #endif
2122
2123         if(!icr)
2124                 return IRQ_NONE;  /* Not our interrupt */
2125
2126         if(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
2127                 hw->get_link_status = 1;
2128                 mod_timer(&adapter->watchdog_timer, jiffies);
2129         }
2130
2131 #ifdef CONFIG_E1000_NAPI
2132         if(netif_rx_schedule_prep(netdev)) {
2133
2134                 /* Disable interrupts and register for poll. The flush
2135                   of the posted write is intentionally left out.
2136                 */
2137
2138                 atomic_inc(&adapter->irq_sem);
2139                 E1000_WRITE_REG(hw, IMC, ~0);
2140                 __netif_rx_schedule(netdev);
2141         }
2142 #else
2143         for(i = 0; i < E1000_MAX_INTR; i++)
2144                 if(!e1000_clean_rx_irq(adapter) &
2145                    !e1000_clean_tx_irq(adapter))
2146                         break;
2147 #endif
2148
2149         return IRQ_HANDLED;
2150 }
2151
2152 #ifdef CONFIG_E1000_NAPI
2153 /**
2154  * e1000_clean - NAPI Rx polling callback
2155  * @adapter: board private structure
2156  **/
2157
2158 static int
2159 e1000_clean(struct net_device *netdev, int *budget)
2160 {
2161         struct e1000_adapter *adapter = netdev->priv;
2162         int work_to_do = min(*budget, netdev->quota);
2163         int work_done = 0;
2164
2165         e1000_clean_tx_irq(adapter);
2166         e1000_clean_rx_irq(adapter, &work_done, work_to_do);
2167
2168         *budget -= work_done;
2169         netdev->quota -= work_done;
2170
2171         if(work_done < work_to_do || !netif_running(netdev)) {
2172                 netif_rx_complete(netdev);
2173                 e1000_irq_enable(adapter);
2174         }
2175
2176         return (work_done >= work_to_do);
2177 }
2178 #endif
2179
2180 /**
2181  * e1000_clean_tx_irq - Reclaim resources after transmit completes
2182  * @adapter: board private structure
2183  **/
2184
2185 static boolean_t
2186 e1000_clean_tx_irq(struct e1000_adapter *adapter)
2187 {
2188         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
2189         struct net_device *netdev = adapter->netdev;
2190         struct pci_dev *pdev = adapter->pdev;
2191         struct e1000_tx_desc *tx_desc, *eop_desc;
2192         struct e1000_buffer *buffer_info;
2193         unsigned int i, eop;
2194         boolean_t cleaned = FALSE;
2195
2196         spin_lock(&adapter->tx_lock);
2197
2198         i = tx_ring->next_to_clean;
2199         eop = tx_ring->buffer_info[i].next_to_watch;
2200         eop_desc = E1000_TX_DESC(*tx_ring, eop);
2201
2202         while(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
2203
2204                 for(cleaned = FALSE; !cleaned; ) {
2205                         tx_desc = E1000_TX_DESC(*tx_ring, i);
2206                         buffer_info = &tx_ring->buffer_info[i];
2207
2208                         if(buffer_info->dma) {
2209
2210                                 pci_unmap_page(pdev,
2211                                                buffer_info->dma,
2212                                                buffer_info->length,
2213                                                PCI_DMA_TODEVICE);
2214
2215                                 buffer_info->dma = 0;
2216                         }
2217
2218                         if(buffer_info->skb) {
2219
2220                                 dev_kfree_skb_any(buffer_info->skb);
2221
2222                                 buffer_info->skb = NULL;
2223                         }
2224
2225                         tx_desc->buffer_addr = 0;
2226                         tx_desc->lower.data = 0;
2227                         tx_desc->upper.data = 0;
2228
2229                         cleaned = (i == eop);
2230                         if(++i == tx_ring->count) i = 0;
2231                 }
2232
2233                 eop = tx_ring->buffer_info[i].next_to_watch;
2234                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
2235         }
2236
2237         tx_ring->next_to_clean = i;
2238
2239         if(cleaned && netif_queue_stopped(netdev) && netif_carrier_ok(netdev))
2240                 netif_wake_queue(netdev);
2241
2242         spin_unlock(&adapter->tx_lock);
2243
2244         return cleaned;
2245 }
2246
2247 /**
2248  * e1000_clean_rx_irq - Send received data up the network stack,
2249  * @adapter: board private structure
2250  **/
2251
2252 static boolean_t
2253 #ifdef CONFIG_E1000_NAPI
2254 e1000_clean_rx_irq(struct e1000_adapter *adapter, int *work_done,
2255                    int work_to_do)
2256 #else
2257 e1000_clean_rx_irq(struct e1000_adapter *adapter)
2258 #endif
2259 {
2260         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2261         struct net_device *netdev = adapter->netdev;
2262         struct pci_dev *pdev = adapter->pdev;
2263         struct e1000_rx_desc *rx_desc;
2264         struct e1000_buffer *buffer_info;
2265         struct sk_buff *skb;
2266         unsigned long flags;
2267         uint32_t length;
2268         uint8_t last_byte;
2269         unsigned int i;
2270         boolean_t cleaned = FALSE;
2271
2272         i = rx_ring->next_to_clean;
2273         rx_desc = E1000_RX_DESC(*rx_ring, i);
2274
2275         while(rx_desc->status & E1000_RXD_STAT_DD) {
2276                 buffer_info = &rx_ring->buffer_info[i];
2277
2278 #ifdef CONFIG_E1000_NAPI
2279                 if(*work_done >= work_to_do)
2280                         break;
2281
2282                 (*work_done)++;
2283 #endif
2284
2285                 cleaned = TRUE;
2286
2287                 pci_unmap_single(pdev,
2288                                  buffer_info->dma,
2289                                  buffer_info->length,
2290                                  PCI_DMA_FROMDEVICE);
2291
2292                 skb = buffer_info->skb;
2293                 length = le16_to_cpu(rx_desc->length);
2294
2295                 if(!(rx_desc->status & E1000_RXD_STAT_EOP)) {
2296
2297                         /* All receives must fit into a single buffer */
2298
2299                         E1000_DBG("Receive packet consumed multiple buffers\n");
2300
2301                         dev_kfree_skb_irq(skb);
2302                         rx_desc->status = 0;
2303                         buffer_info->skb = NULL;
2304
2305                         if(++i == rx_ring->count) i = 0;
2306
2307                         rx_desc = E1000_RX_DESC(*rx_ring, i);
2308                         continue;
2309                 }
2310
2311                 if(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
2312
2313                         last_byte = *(skb->data + length - 1);
2314
2315                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
2316                                       rx_desc->errors, length, last_byte)) {
2317
2318                                 spin_lock_irqsave(&adapter->stats_lock, flags);
2319
2320                                 e1000_tbi_adjust_stats(&adapter->hw,
2321                                                        &adapter->stats,
2322                                                        length, skb->data);
2323
2324                                 spin_unlock_irqrestore(&adapter->stats_lock,
2325                                                        flags);
2326                                 length--;
2327                         } else {
2328
2329                                 dev_kfree_skb_irq(skb);
2330                                 rx_desc->status = 0;
2331                                 buffer_info->skb = NULL;
2332
2333                                 if(++i == rx_ring->count) i = 0;
2334
2335                                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2336                                 continue;
2337                         }
2338                 }
2339
2340                 /* Good Receive */
2341                 skb_put(skb, length - ETHERNET_FCS_SIZE);
2342
2343                 /* Receive Checksum Offload */
2344                 e1000_rx_checksum(adapter, rx_desc, skb);
2345
2346                 skb->protocol = eth_type_trans(skb, netdev);
2347 #ifdef CONFIG_E1000_NAPI
2348                 if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) {
2349                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2350                                 le16_to_cpu(rx_desc->special &
2351                                         E1000_RXD_SPC_VLAN_MASK));
2352                 } else {
2353                         netif_receive_skb(skb);
2354                 }
2355 #else /* CONFIG_E1000_NAPI */
2356                 if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) {
2357                         vlan_hwaccel_rx(skb, adapter->vlgrp,
2358                                 le16_to_cpu(rx_desc->special &
2359                                         E1000_RXD_SPC_VLAN_MASK));
2360                 } else {
2361                         netif_rx(skb);
2362                 }
2363 #endif /* CONFIG_E1000_NAPI */
2364                 netdev->last_rx = jiffies;
2365
2366                 rx_desc->status = 0;
2367                 buffer_info->skb = NULL;
2368
2369                 if(++i == rx_ring->count) i = 0;
2370
2371                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2372         }
2373
2374         rx_ring->next_to_clean = i;
2375
2376         e1000_alloc_rx_buffers(adapter);
2377
2378         return cleaned;
2379 }
2380
2381 /**
2382  * e1000_alloc_rx_buffers - Replace used receive buffers
2383  * @adapter: address of board private structure
2384  **/
2385
2386 static void
2387 e1000_alloc_rx_buffers(struct e1000_adapter *adapter)
2388 {
2389         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2390         struct net_device *netdev = adapter->netdev;
2391         struct pci_dev *pdev = adapter->pdev;
2392         struct e1000_rx_desc *rx_desc;
2393         struct e1000_buffer *buffer_info;
2394         struct sk_buff *skb;
2395         int reserve_len = 2;
2396         unsigned int i;
2397
2398         i = rx_ring->next_to_use;
2399         buffer_info = &rx_ring->buffer_info[i];
2400
2401         while(!buffer_info->skb) {
2402                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2403
2404                 skb = dev_alloc_skb(adapter->rx_buffer_len + reserve_len);
2405
2406                 if(!skb) {
2407                         /* Better luck next round */
2408                         break;
2409                 }
2410
2411                 /* Make buffer alignment 2 beyond a 16 byte boundary
2412                  * this will result in a 16 byte aligned IP header after
2413                  * the 14 byte MAC header is removed
2414                  */
2415                 skb_reserve(skb, reserve_len);
2416
2417                 skb->dev = netdev;
2418
2419                 buffer_info->skb = skb;
2420                 buffer_info->length = adapter->rx_buffer_len;
2421                 buffer_info->dma =
2422                         pci_map_single(pdev,
2423                                        skb->data,
2424                                        adapter->rx_buffer_len,
2425                                        PCI_DMA_FROMDEVICE);
2426
2427                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2428
2429                 if((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i) {
2430                         /* Force memory writes to complete before letting h/w
2431                          * know there are new descriptors to fetch.  (Only
2432                          * applicable for weak-ordered memory model archs,
2433                          * such as IA-64). */
2434                         wmb();
2435
2436                         E1000_WRITE_REG(&adapter->hw, RDT, i);
2437                 }
2438
2439                 if(++i == rx_ring->count) i = 0;
2440                 buffer_info = &rx_ring->buffer_info[i];
2441         }
2442
2443         rx_ring->next_to_use = i;
2444 }
2445
2446 /**
2447  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
2448  * @adapter:
2449  **/
2450
2451 static void
2452 e1000_smartspeed(struct e1000_adapter *adapter)
2453 {
2454         uint16_t phy_status;
2455         uint16_t phy_ctrl;
2456
2457         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
2458            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
2459                 return;
2460
2461         if(adapter->smartspeed == 0) {
2462                 /* If Master/Slave config fault is asserted twice,
2463                  * we assume back-to-back */
2464                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
2465                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
2466                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
2467                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
2468                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
2469                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
2470                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
2471                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
2472                                             phy_ctrl);
2473                         adapter->smartspeed++;
2474                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
2475                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
2476                                                &phy_ctrl)) {
2477                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
2478                                              MII_CR_RESTART_AUTO_NEG);
2479                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
2480                                                     phy_ctrl);
2481                         }
2482                 }
2483                 return;
2484         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
2485                 /* If still no link, perhaps using 2/3 pair cable */
2486                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
2487                 phy_ctrl |= CR_1000T_MS_ENABLE;
2488                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
2489                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
2490                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
2491                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
2492                                      MII_CR_RESTART_AUTO_NEG);
2493                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
2494                 }
2495         }
2496         /* Restart process after E1000_SMARTSPEED_MAX iterations */
2497         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
2498                 adapter->smartspeed = 0;
2499 }
2500
2501 /**
2502  * e1000_ioctl -
2503  * @netdev:
2504  * @ifreq:
2505  * @cmd:
2506  **/
2507
2508 static int
2509 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2510 {
2511         switch (cmd) {
2512         case SIOCGMIIPHY:
2513         case SIOCGMIIREG:
2514         case SIOCSMIIREG:
2515                 return e1000_mii_ioctl(netdev, ifr, cmd);
2516         case SIOCETHTOOL:
2517                 return e1000_ethtool_ioctl(netdev, ifr);
2518         default:
2519                 return -EOPNOTSUPP;
2520         }
2521 }
2522
2523 /**
2524  * e1000_mii_ioctl -
2525  * @netdev:
2526  * @ifreq:
2527  * @cmd:
2528  **/
2529
2530 static int
2531 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2532 {
2533         struct e1000_adapter *adapter = netdev->priv;
2534         struct mii_ioctl_data *data = (struct mii_ioctl_data *)&ifr->ifr_data;
2535         int retval;
2536         uint16_t mii_reg;
2537         uint16_t spddplx;
2538
2539         if(adapter->hw.media_type != e1000_media_type_copper)
2540                 return -EOPNOTSUPP;
2541
2542         switch (cmd) {
2543         case SIOCGMIIPHY:
2544                 data->phy_id = adapter->hw.phy_addr;
2545                 break;
2546         case SIOCGMIIREG:
2547                 if (!capable(CAP_NET_ADMIN))
2548                         return -EPERM;
2549                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
2550                                    &data->val_out))
2551                         return -EIO;
2552                 break;
2553         case SIOCSMIIREG:
2554                 if (!capable(CAP_NET_ADMIN))
2555                         return -EPERM;
2556                 if (data->reg_num & ~(0x1F))
2557                         return -EFAULT;
2558                 mii_reg = data->val_in;
2559                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
2560                                         data->val_in))
2561                         return -EIO;
2562                 if (adapter->hw.phy_type == e1000_phy_m88) {
2563                         switch (data->reg_num) {
2564                         case PHY_CTRL:
2565                                 if(data->val_in & MII_CR_AUTO_NEG_EN) {
2566                                         adapter->hw.autoneg = 1;
2567                                         adapter->hw.autoneg_advertised = 0x2F;
2568                                 } else {
2569                                         if (data->val_in & 0x40)
2570                                                 spddplx = SPEED_1000;
2571                                         else if (data->val_in & 0x2000)
2572                                                 spddplx = SPEED_100;
2573                                         else
2574                                                 spddplx = SPEED_10;
2575                                         spddplx += (data->val_in & 0x100)
2576                                                    ? FULL_DUPLEX :
2577                                                    HALF_DUPLEX;
2578                                         retval = e1000_set_spd_dplx(adapter,
2579                                                                     spddplx);
2580                                         if(retval)
2581                                                 return retval;
2582                                 }
2583                                 if(netif_running(adapter->netdev)) {
2584                                         e1000_down(adapter);
2585                                         e1000_up(adapter);
2586                                 } else
2587                                         e1000_reset(adapter);
2588                                 break;
2589                         case M88E1000_PHY_SPEC_CTRL:
2590                         case M88E1000_EXT_PHY_SPEC_CTRL:
2591                                 if (e1000_phy_reset(&adapter->hw))
2592                                         return -EIO;
2593                                 break;
2594                         }
2595                 }
2596                 break;
2597         default:
2598                 return -EOPNOTSUPP;
2599         }
2600         return E1000_SUCCESS;
2601 }
2602
2603 /**
2604  * e1000_rx_checksum - Receive Checksum Offload for 82543
2605  * @adapter: board private structure
2606  * @rx_desc: receive descriptor
2607  * @sk_buff: socket buffer with received data
2608  **/
2609
2610 static inline void
2611 e1000_rx_checksum(struct e1000_adapter *adapter,
2612                   struct e1000_rx_desc *rx_desc,
2613                   struct sk_buff *skb)
2614 {
2615         /* 82543 or newer only */
2616         if((adapter->hw.mac_type < e1000_82543) ||
2617         /* Ignore Checksum bit is set */
2618         (rx_desc->status & E1000_RXD_STAT_IXSM) ||
2619         /* TCP Checksum has not been calculated */
2620         (!(rx_desc->status & E1000_RXD_STAT_TCPCS))) {
2621                 skb->ip_summed = CHECKSUM_NONE;
2622                 return;
2623         }
2624
2625         /* At this point we know the hardware did the TCP checksum */
2626         /* now look at the TCP checksum error bit */
2627         if(rx_desc->errors & E1000_RXD_ERR_TCPE) {
2628                 /* let the stack verify checksum errors */
2629                 skb->ip_summed = CHECKSUM_NONE;
2630                 adapter->hw_csum_err++;
2631         } else {
2632         /* TCP checksum is good */
2633                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2634                 adapter->hw_csum_good++;
2635         }
2636 }
2637
2638 void
2639 e1000_pci_set_mwi(struct e1000_hw *hw)
2640 {
2641         struct e1000_adapter *adapter = hw->back;
2642
2643         pci_set_mwi(adapter->pdev);
2644 }
2645
2646 void
2647 e1000_pci_clear_mwi(struct e1000_hw *hw)
2648 {
2649         struct e1000_adapter *adapter = hw->back;
2650
2651         pci_clear_mwi(adapter->pdev);
2652 }
2653
2654 void
2655 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
2656 {
2657         struct e1000_adapter *adapter = hw->back;
2658
2659         pci_read_config_word(adapter->pdev, reg, value);
2660 }
2661
2662 void
2663 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
2664 {
2665         struct e1000_adapter *adapter = hw->back;
2666
2667         pci_write_config_word(adapter->pdev, reg, *value);
2668 }
2669
2670 uint32_t
2671 e1000_io_read(struct e1000_hw *hw, unsigned long port)
2672 {
2673         return inl(port);
2674 }
2675
2676 void
2677 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
2678 {
2679         outl(value, port);
2680 }
2681
2682 static void
2683 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2684 {
2685         struct e1000_adapter *adapter = netdev->priv;
2686         uint32_t ctrl, rctl;
2687
2688         e1000_irq_disable(adapter);
2689         adapter->vlgrp = grp;
2690
2691         if(grp) {
2692                 /* enable VLAN tag insert/strip */
2693
2694                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2695                 ctrl |= E1000_CTRL_VME;
2696                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
2697
2698                 /* enable VLAN receive filtering */
2699
2700                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2701                 rctl |= E1000_RCTL_VFE;
2702                 rctl &= ~E1000_RCTL_CFIEN;
2703                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2704         } else {
2705                 /* disable VLAN tag insert/strip */
2706
2707                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2708                 ctrl &= ~E1000_CTRL_VME;
2709                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
2710
2711                 /* disable VLAN filtering */
2712
2713                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2714                 rctl &= ~E1000_RCTL_VFE;
2715                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2716         }
2717
2718         e1000_irq_enable(adapter);
2719 }
2720
2721 static void
2722 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2723 {
2724         struct e1000_adapter *adapter = netdev->priv;
2725         uint32_t vfta, index;
2726
2727         /* add VID to filter table */
2728
2729         index = (vid >> 5) & 0x7F;
2730         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2731         vfta |= (1 << (vid & 0x1F));
2732         e1000_write_vfta(&adapter->hw, index, vfta);
2733 }
2734
2735 static void
2736 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2737 {
2738         struct e1000_adapter *adapter = netdev->priv;
2739         uint32_t vfta, index;
2740
2741         e1000_irq_disable(adapter);
2742
2743         if(adapter->vlgrp)
2744                 adapter->vlgrp->vlan_devices[vid] = NULL;
2745
2746         e1000_irq_enable(adapter);
2747
2748         /* remove VID from filter table*/
2749
2750         index = (vid >> 5) & 0x7F;
2751         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2752         vfta &= ~(1 << (vid & 0x1F));
2753         e1000_write_vfta(&adapter->hw, index, vfta);
2754 }
2755
2756 static void
2757 e1000_restore_vlan(struct e1000_adapter *adapter)
2758 {
2759         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2760
2761         if(adapter->vlgrp) {
2762                 uint16_t vid;
2763                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2764                         if(!adapter->vlgrp->vlan_devices[vid])
2765                                 continue;
2766                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
2767                 }
2768         }
2769 }
2770
2771 int
2772 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
2773 {
2774         adapter->hw.autoneg = 0;
2775
2776         switch(spddplx) {
2777         case SPEED_10 + DUPLEX_HALF:
2778                 adapter->hw.forced_speed_duplex = e1000_10_half;
2779                 break;
2780         case SPEED_10 + DUPLEX_FULL:
2781                 adapter->hw.forced_speed_duplex = e1000_10_full;
2782                 break;
2783         case SPEED_100 + DUPLEX_HALF:
2784                 adapter->hw.forced_speed_duplex = e1000_100_half;
2785                 break;
2786         case SPEED_100 + DUPLEX_FULL:
2787                 adapter->hw.forced_speed_duplex = e1000_100_full;
2788                 break;
2789         case SPEED_1000 + DUPLEX_FULL:
2790                 adapter->hw.autoneg = 1;
2791                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
2792                 break;
2793         case SPEED_1000 + DUPLEX_HALF: /* not supported */
2794         default:
2795                 return -EINVAL;
2796         }
2797         return 0;
2798 }
2799
2800 static int
2801 e1000_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
2802 {
2803         struct pci_dev *pdev = NULL;
2804
2805         switch(event) {
2806         case SYS_DOWN:
2807         case SYS_HALT:
2808         case SYS_POWER_OFF:
2809                 while((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
2810                         if(pci_dev_driver(pdev) == &e1000_driver)
2811                                 e1000_suspend(pdev, 3);
2812                 }
2813         }
2814         return NOTIFY_DONE;
2815 }
2816
2817 static int
2818 e1000_suspend(struct pci_dev *pdev, uint32_t state)
2819 {
2820         struct net_device *netdev = pci_get_drvdata(pdev);
2821         struct e1000_adapter *adapter = netdev->priv;
2822         uint32_t ctrl, ctrl_ext, rctl, manc, status;
2823         uint32_t wufc = adapter->wol;
2824
2825         netif_device_detach(netdev);
2826
2827         if(netif_running(netdev))
2828                 e1000_down(adapter);
2829
2830         status = E1000_READ_REG(&adapter->hw, STATUS);
2831         if(status & E1000_STATUS_LU)
2832                 wufc &= ~E1000_WUFC_LNKC;
2833
2834         if(wufc) {
2835                 e1000_setup_rctl(adapter);
2836                 e1000_set_multi(netdev);
2837
2838                 /* turn on all-multi mode if wake on multicast is enabled */
2839                 if(adapter->wol & E1000_WUFC_MC) {
2840                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2841                         rctl |= E1000_RCTL_MPE;
2842                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2843                 }
2844
2845                 if(adapter->hw.mac_type >= e1000_82540) {
2846                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2847                         /* advertise wake from D3Cold */
2848                         #define E1000_CTRL_ADVD3WUC 0x00100000
2849                         /* phy power management enable */
2850                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
2851                         ctrl |= E1000_CTRL_ADVD3WUC |
2852                                 E1000_CTRL_EN_PHY_PWR_MGMT;
2853                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
2854                 }
2855
2856                 if(adapter->hw.media_type == e1000_media_type_fiber ||
2857                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
2858                         /* keep the laser running in D3 */
2859                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
2860                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
2861                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
2862                 }
2863
2864                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
2865                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
2866                 pci_enable_wake(pdev, 3, 1);
2867                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
2868         } else {
2869                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
2870                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
2871                 pci_enable_wake(pdev, 3, 0);
2872                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
2873         }
2874
2875         pci_save_state(pdev, adapter->pci_state);
2876
2877         if(adapter->hw.mac_type >= e1000_82540 &&
2878            adapter->hw.media_type == e1000_media_type_copper) {
2879                 manc = E1000_READ_REG(&adapter->hw, MANC);
2880                 if(manc & E1000_MANC_SMBUS_EN) {
2881                         manc |= E1000_MANC_ARP_EN;
2882                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
2883                         pci_enable_wake(pdev, 3, 1);
2884                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
2885                 }
2886         }
2887
2888         state = (state > 0) ? 3 : 0;
2889         pci_set_power_state(pdev, state);
2890
2891         return 0;
2892 }
2893
2894 #ifdef CONFIG_PM
2895 static int
2896 e1000_resume(struct pci_dev *pdev)
2897 {
2898         struct net_device *netdev = pci_get_drvdata(pdev);
2899         struct e1000_adapter *adapter = netdev->priv;
2900         uint32_t manc;
2901
2902         pci_set_power_state(pdev, 0);
2903         pci_restore_state(pdev, adapter->pci_state);
2904
2905         pci_enable_wake(pdev, 3, 0);
2906         pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
2907
2908         e1000_reset(adapter);
2909         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
2910
2911         if(netif_running(netdev))
2912                 e1000_up(adapter);
2913
2914         netif_device_attach(netdev);
2915
2916         if(adapter->hw.mac_type >= e1000_82540 &&
2917            adapter->hw.media_type == e1000_media_type_copper) {
2918                 manc = E1000_READ_REG(&adapter->hw, MANC);
2919                 manc &= ~(E1000_MANC_ARP_EN);
2920                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
2921         }
2922
2923         return 0;
2924 }
2925 #endif
2926
2927 #ifdef CONFIG_NET_POLL_CONTROLLER
2928 /*
2929  * Polling 'interrupt' - used by things like netconsole to send skbs
2930  * without having to re-enable interrupts. It's not called while
2931  * the interrupt routine is executing.
2932  */
2933
2934 static void e1000_netpoll (struct net_device *dev)
2935 {
2936         struct e1000_adapter *adapter = dev->priv;
2937         disable_irq(adapter->pdev->irq);
2938         e1000_intr (adapter->pdev->irq, dev, NULL);
2939         enable_irq(adapter->pdev->irq);
2940 }
2941 #endif
2942
2943 /* e1000_main.c */