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  * 5.3.12       6/7/04
  33  * - kcompat NETIF_MSG for older kernels (2.4.9) <sean.p.mcdermott@intel.com>
  34  * - if_mii support and associated kcompat for older kernels
  35  * - More errlogging support from Jon Mason <jonmason@us.ibm.com>
  36  * - Fix TSO issues on PPC64 machines -- Jon Mason <jonmason@us.ibm.com>
  37  *
  38  * 5.7.1        12/16/04
  39  * - Resurrect 82547EI/GI related fix in e1000_intr to avoid deadlocks. This
  40  *   fix was removed as it caused system instability. The suspected cause of
  41  *   this is the called to e1000_irq_disable in e1000_intr. Inlined the
  42  *   required piece of e1000_irq_disable into e1000_intr - Anton Blanchard
  43  * 5.7.0        12/10/04
  44  * - include fix to the condition that determines when to quit NAPI - Robert Olsson
  45  * - use netif_poll_{disable/enable} to synchronize between NAPI and i/f up/down
  46  * 5.6.5        11/01/04
  47  * - Enabling NETIF_F_SG without checksum offload is illegal -
  48      John Mason <jdmason@us.ibm.com>
  49  * 5.6.3        10/26/04
  50  * - Remove redundant initialization - Jamal Hadi
  51  * - Reset buffer_info->dma in tx resource cleanup logic
  52  * 5.6.2        10/12/04
  53  * - Avoid filling tx_ring completely - shemminger@osdl.org
  54  * - Replace schedule_timeout() with msleep()/msleep_interruptible() -
  55  *   nacc@us.ibm.com
  56  * - Sparse cleanup - shemminger@osdl.org
  57  * - Fix tx resource cleanup logic
  58  * - LLTX support - ak@suse.de and hadi@cyberus.ca
  59  */
  60
  61 char e1000_driver_name[] = "e1000";
  62 char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  63 #ifndef CONFIG_E1000_NAPI
  64 #define DRIVERNAPI
  65 #else
  66 #define DRIVERNAPI "-NAPI"
  67 #endif
  68 #define DRV_VERSION "5.7.6-k2"DRIVERNAPI
  69 char e1000_driver_version[] = DRV_VERSION;
  70 char e1000_copyright[] = "Copyright (c) 1999-2004 Intel Corporation.";
  71
  72 /* e1000_pci_tbl - PCI Device ID Table
  73  *
  74  * Last entry must be all 0s
  75  *
  76  * Macro expands to...
  77  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  78  */
  79 static struct pci_device_id e1000_pci_tbl[] = {
  80         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  85         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  86         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  87         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  88         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  89         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  91         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  94         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  95         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  96         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  97         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  99         INTEL_E1000_ETHERNET_DEVICE(0x101D),
 100         INTEL_E1000_ETHERNET_DEVICE(0x101E),
 101         INTEL_E1000_ETHERNET_DEVICE(0x1026),
 102         INTEL_E1000_ETHERNET_DEVICE(0x1027),
 103         INTEL_E1000_ETHERNET_DEVICE(0x1028),
 104         INTEL_E1000_ETHERNET_DEVICE(0x1075),
 105         INTEL_E1000_ETHERNET_DEVICE(0x1076),
 106         INTEL_E1000_ETHERNET_DEVICE(0x1077),
 107         INTEL_E1000_ETHERNET_DEVICE(0x1078),
 108         INTEL_E1000_ETHERNET_DEVICE(0x1079),
 109         INTEL_E1000_ETHERNET_DEVICE(0x107A),
 110         INTEL_E1000_ETHERNET_DEVICE(0x107B),
 111         INTEL_E1000_ETHERNET_DEVICE(0x107C),
 112         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 113         /* required last entry */
 114         {0,}
 115 };
 116
 117 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 118
 119 int e1000_up(struct e1000_adapter *adapter);
 120 void e1000_down(struct e1000_adapter *adapter);
 121 void e1000_reset(struct e1000_adapter *adapter);
 122 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 123 int e1000_setup_tx_resources(struct e1000_adapter *adapter);
 124 int e1000_setup_rx_resources(struct e1000_adapter *adapter);
 125 void e1000_free_tx_resources(struct e1000_adapter *adapter);
 126 void e1000_free_rx_resources(struct e1000_adapter *adapter);
 127 void e1000_update_stats(struct e1000_adapter *adapter);
 128
 129 /* Local Function Prototypes */
 130
 131 static int e1000_init_module(void);
 132 static void e1000_exit_module(void);
 133 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 134 static void __devexit e1000_remove(struct pci_dev *pdev);
 135 static int e1000_sw_init(struct e1000_adapter *adapter);
 136 static int e1000_open(struct net_device *netdev);
 137 static int e1000_close(struct net_device *netdev);
 138 static void e1000_configure_tx(struct e1000_adapter *adapter);
 139 static void e1000_configure_rx(struct e1000_adapter *adapter);
 140 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 141 static void e1000_clean_tx_ring(struct e1000_adapter *adapter);
 142 static void e1000_clean_rx_ring(struct e1000_adapter *adapter);
 143 static void e1000_set_multi(struct net_device *netdev);
 144 static void e1000_update_phy_info(unsigned long data);
 145 static void e1000_watchdog(unsigned long data);
 146 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 147 static void e1000_82547_tx_fifo_stall(unsigned long data);
 148 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 149 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 150 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 151 static int e1000_set_mac(struct net_device *netdev, void *p);
 152 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 153 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter);
 154 #ifdef CONFIG_E1000_NAPI
 155 static int e1000_clean(struct net_device *netdev, int *budget);
 156 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 157                                     int *work_done, int work_to_do);
 158 #else
 159 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter);
 160 #endif
 161 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
 162 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 163 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 164                            int cmd);
 165 void e1000_set_ethtool_ops(struct net_device *netdev);
 166 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 167 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 168 static void e1000_tx_timeout(struct net_device *dev);
 169 static void e1000_tx_timeout_task(struct net_device *dev);
 170 static void e1000_smartspeed(struct e1000_adapter *adapter);
 171 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 172                                               struct sk_buff *skb);
 173
 174 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 175 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 176 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 177 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 178
 179 static int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr);
 180 static int e1000_suspend(struct pci_dev *pdev, uint32_t state);
 181 #ifdef CONFIG_PM
 182 static int e1000_resume(struct pci_dev *pdev);
 183 #endif
 184
 185 #ifdef CONFIG_NET_POLL_CONTROLLER
 186 /* for netdump / net console */
 187 static void e1000_netpoll (struct net_device *netdev);
 188 #endif
 189
 190 struct notifier_block e1000_notifier_reboot = {
 191         .notifier_call  = e1000_notify_reboot,
 192         .next           = NULL,
 193         .priority       = 0
 194 };
 195
 196 /* Exported from other modules */
 197
 198 extern void e1000_check_options(struct e1000_adapter *adapter);
 199
 200 static struct pci_driver e1000_driver = {
 201         .name     = e1000_driver_name,
 202         .id_table = e1000_pci_tbl,
 203         .probe    = e1000_probe,
 204         .remove   = __devexit_p(e1000_remove),
 205         /* Power Managment Hooks */
 206 #ifdef CONFIG_PM
 207         .suspend  = e1000_suspend,
 208         .resume   = e1000_resume
 209 #endif
 210 };
 211
 212 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 213 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 214 MODULE_LICENSE("GPL");
 215 MODULE_VERSION(DRV_VERSION);
 216
 217 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 218 module_param(debug, int, 0);
 219 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 220
 221 /**
 222  * e1000_init_module - Driver Registration Routine
 223  *
 224  * e1000_init_module is the first routine called when the driver is
 225  * loaded. All it does is register with the PCI subsystem.
 226  **/
 227
 228 static int __init
 229 e1000_init_module(void)
 230 {
 231         int ret;
 232         printk(KERN_INFO "%s - version %s\n",
 233                e1000_driver_string, e1000_driver_version);
 234
 235         printk(KERN_INFO "%s\n", e1000_copyright);
 236
 237         ret = pci_module_init(&e1000_driver);
 238         if(ret >= 0) {
 239                 register_reboot_notifier(&e1000_notifier_reboot);
 240         }
 241         return ret;
 242 }
 243
 244 module_init(e1000_init_module);
 245
 246 /**
 247  * e1000_exit_module - Driver Exit Cleanup Routine
 248  *
 249  * e1000_exit_module is called just before the driver is removed
 250  * from memory.
 251  **/
 252
 253 static void __exit
 254 e1000_exit_module(void)
 255 {
 256         unregister_reboot_notifier(&e1000_notifier_reboot);
 257         pci_unregister_driver(&e1000_driver);
 258 }
 259
 260 module_exit(e1000_exit_module);
 261
 262 /**
 263  * e1000_irq_disable - Mask off interrupt generation on the NIC
 264  * @adapter: board private structure
 265  **/
 266
 267 static inline void
 268 e1000_irq_disable(struct e1000_adapter *adapter)
 269 {
 270         atomic_inc(&adapter->irq_sem);
 271         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 272         E1000_WRITE_FLUSH(&adapter->hw);
 273         synchronize_irq(adapter->pdev->irq);
 274 }
 275
 276 /**
 277  * e1000_irq_enable - Enable default interrupt generation settings
 278  * @adapter: board private structure
 279  **/
 280
 281 static inline void
 282 e1000_irq_enable(struct e1000_adapter *adapter)
 283 {
 284         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 285                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 286                 E1000_WRITE_FLUSH(&adapter->hw);
 287         }
 288 }
 289
 290 int
 291 e1000_up(struct e1000_adapter *adapter)
 292 {
 293         struct net_device *netdev = adapter->netdev;
 294         int err;
 295
 296         /* hardware has been reset, we need to reload some things */
 297
 298         /* Reset the PHY if it was previously powered down */
 299         if(adapter->hw.media_type == e1000_media_type_copper) {
 300                 uint16_t mii_reg;
 301                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 302                 if(mii_reg & MII_CR_POWER_DOWN)
 303                         e1000_phy_reset(&adapter->hw);
 304         }
 305
 306         e1000_set_multi(netdev);
 307
 308         e1000_restore_vlan(adapter);
 309
 310         e1000_configure_tx(adapter);
 311         e1000_setup_rctl(adapter);
 312         e1000_configure_rx(adapter);
 313         e1000_alloc_rx_buffers(adapter);
 314
 315 #ifdef CONFIG_PCI_MSI
 316         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 317                 adapter->have_msi = TRUE;
 318                 if((err = pci_enable_msi(adapter->pdev))) {
 319                         DPRINTK(PROBE, ERR,
 320                          "Unable to allocate MSI interrupt Error: %d\n", err);
 321                         adapter->have_msi = FALSE;
 322                 }
 323         }
 324 #endif
 325         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 326                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 327                               netdev->name, netdev)))
 328                 return err;
 329
 330         mod_timer(&adapter->watchdog_timer, jiffies);
 331
 332 #ifdef CONFIG_E1000_NAPI
 333         netif_poll_enable(netdev);
 334 #endif
 335         e1000_irq_enable(adapter);
 336
 337         return 0;
 338 }
 339
 340 void
 341 e1000_down(struct e1000_adapter *adapter)
 342 {
 343         struct net_device *netdev = adapter->netdev;
 344
 345         e1000_irq_disable(adapter);
 346         free_irq(adapter->pdev->irq, netdev);
 347 #ifdef CONFIG_PCI_MSI
 348         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 349            adapter->have_msi == TRUE)
 350                 pci_disable_msi(adapter->pdev);
 351 #endif
 352         del_timer_sync(&adapter->tx_fifo_stall_timer);
 353         del_timer_sync(&adapter->watchdog_timer);
 354         del_timer_sync(&adapter->phy_info_timer);
 355
 356 #ifdef CONFIG_E1000_NAPI
 357         netif_poll_disable(netdev);
 358 #endif
 359         adapter->link_speed = 0;
 360         adapter->link_duplex = 0;
 361         netif_carrier_off(netdev);
 362         netif_stop_queue(netdev);
 363
 364         e1000_reset(adapter);
 365         e1000_clean_tx_ring(adapter);
 366         e1000_clean_rx_ring(adapter);
 367
 368         /* If WoL is not enabled
 369          * Power down the PHY so no link is implied when interface is down */
 370         if(!adapter->wol && adapter->hw.media_type == e1000_media_type_copper) {
 371                 uint16_t mii_reg;
 372                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 373                 mii_reg |= MII_CR_POWER_DOWN;
 374                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 375                 mdelay(1);
 376         }
 377 }
 378
 379 void
 380 e1000_reset(struct e1000_adapter *adapter)
 381 {
 382         uint32_t pba;
 383
 384         /* Repartition Pba for greater than 9k mtu
 385          * To take effect CTRL.RST is required.
 386          */
 387
 388         if(adapter->hw.mac_type < e1000_82547) {
 389                 if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
 390                         pba = E1000_PBA_40K;
 391                 else
 392                         pba = E1000_PBA_48K;
 393         } else {
 394                 if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
 395                         pba = E1000_PBA_22K;
 396                 else
 397                         pba = E1000_PBA_30K;
 398                 adapter->tx_fifo_head = 0;
 399                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 400                 adapter->tx_fifo_size =
 401                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 402                 atomic_set(&adapter->tx_fifo_stall, 0);
 403         }
 404         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 405
 406         /* flow control settings */
 407         adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
 408                                     E1000_FC_HIGH_DIFF;
 409         adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
 410                                    E1000_FC_LOW_DIFF;
 411         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 412         adapter->hw.fc_send_xon = 1;
 413         adapter->hw.fc = adapter->hw.original_fc;
 414
 415         e1000_reset_hw(&adapter->hw);
 416         if(adapter->hw.mac_type >= e1000_82544)
 417                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 418         if(e1000_init_hw(&adapter->hw))
 419                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 420
 421         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 422         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 423
 424         e1000_reset_adaptive(&adapter->hw);
 425         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 426 }
 427
 428 /**
 429  * e1000_probe - Device Initialization Routine
 430  * @pdev: PCI device information struct
 431  * @ent: entry in e1000_pci_tbl
 432  *
 433  * Returns 0 on success, negative on failure
 434  *
 435  * e1000_probe initializes an adapter identified by a pci_dev structure.
 436  * The OS initialization, configuring of the adapter private structure,
 437  * and a hardware reset occur.
 438  **/
 439
 440 static int __devinit
 441 e1000_probe(struct pci_dev *pdev,
 442             const struct pci_device_id *ent)
 443 {
 444         struct net_device *netdev;
 445         struct e1000_adapter *adapter;
 446         static int cards_found = 0;
 447         unsigned long mmio_start;
 448         int mmio_len;
 449         int pci_using_dac;
 450         int i;
 451         int err;
 452         uint16_t eeprom_data;
 453         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 454
 455         if((err = pci_enable_device(pdev)))
 456                 return err;
 457
 458         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 459                 pci_using_dac = 1;
 460         } else {
 461                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 462                         E1000_ERR("No usable DMA configuration, aborting\n");
 463                         return err;
 464                 }
 465                 pci_using_dac = 0;
 466         }
 467
 468         if((err = pci_request_regions(pdev, e1000_driver_name)))
 469                 return err;
 470
 471         pci_set_master(pdev);
 472
 473         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 474         if(!netdev) {
 475                 err = -ENOMEM;
 476                 goto err_alloc_etherdev;
 477         }
 478
 479         SET_MODULE_OWNER(netdev);
 480         SET_NETDEV_DEV(netdev, &pdev->dev);
 481
 482         pci_set_drvdata(pdev, netdev);
 483         adapter = netdev->priv;
 484         adapter->netdev = netdev;
 485         adapter->pdev = pdev;
 486         adapter->hw.back = adapter;
 487         adapter->msg_enable = (1 << debug) - 1;
 488
 489         mmio_start = pci_resource_start(pdev, BAR_0);
 490         mmio_len = pci_resource_len(pdev, BAR_0);
 491
 492         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 493         if(!adapter->hw.hw_addr) {
 494                 err = -EIO;
 495                 goto err_ioremap;
 496         }
 497
 498         for(i = BAR_1; i <= BAR_5; i++) {
 499                 if(pci_resource_len(pdev, i) == 0)
 500                         continue;
 501                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 502                         adapter->hw.io_base = pci_resource_start(pdev, i);
 503                         break;
 504                 }
 505         }
 506
 507         netdev->open = &e1000_open;
 508         netdev->stop = &e1000_close;
 509         netdev->hard_start_xmit = &e1000_xmit_frame;
 510         netdev->get_stats = &e1000_get_stats;
 511         netdev->set_multicast_list = &e1000_set_multi;
 512         netdev->set_mac_address = &e1000_set_mac;
 513         netdev->change_mtu = &e1000_change_mtu;
 514         netdev->do_ioctl = &e1000_ioctl;
 515         e1000_set_ethtool_ops(netdev);
 516         netdev->tx_timeout = &e1000_tx_timeout;
 517         netdev->watchdog_timeo = 5 * HZ;
 518 #ifdef CONFIG_E1000_NAPI
 519         netdev->poll = &e1000_clean;
 520         netdev->weight = 64;
 521 #endif
 522         netdev->vlan_rx_register = e1000_vlan_rx_register;
 523         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 524         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 525 #ifdef CONFIG_NET_POLL_CONTROLLER
 526         netdev->poll_controller = e1000_netpoll;
 527 #endif
 528         strcpy(netdev->name, pci_name(pdev));
 529
 530         netdev->mem_start = mmio_start;
 531         netdev->mem_end = mmio_start + mmio_len;
 532         netdev->base_addr = adapter->hw.io_base;
 533
 534         adapter->bd_number = cards_found;
 535
 536         /* setup the private structure */
 537
 538         if((err = e1000_sw_init(adapter)))
 539                 goto err_sw_init;
 540
 541         if(adapter->hw.mac_type >= e1000_82543) {
 542                 netdev->features = NETIF_F_SG |
 543                                    NETIF_F_HW_CSUM |
 544                                    NETIF_F_HW_VLAN_TX |
 545                                    NETIF_F_HW_VLAN_RX |
 546                                    NETIF_F_HW_VLAN_FILTER;
 547         }
 548
 549 #ifdef NETIF_F_TSO
 550         if((adapter->hw.mac_type >= e1000_82544) &&
 551            (adapter->hw.mac_type != e1000_82547))
 552                 netdev->features |= NETIF_F_TSO;
 553 #endif
 554         if(pci_using_dac)
 555                 netdev->features |= NETIF_F_HIGHDMA;
 556
 557         /* hard_start_xmit is safe against parallel locking */
 558         netdev->features |= NETIF_F_LLTX;
 559
 560         /* before reading the EEPROM, reset the controller to
 561          * put the device in a known good starting state */
 562
 563         e1000_reset_hw(&adapter->hw);
 564
 565         /* make sure the EEPROM is good */
 566
 567         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 568                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 569                 err = -EIO;
 570                 goto err_eeprom;
 571         }
 572
 573         /* copy the MAC address out of the EEPROM */
 574
 575         if (e1000_read_mac_addr(&adapter->hw))
 576                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 577         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 578
 579         if(!is_valid_ether_addr(netdev->dev_addr)) {
 580                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 581                 err = -EIO;
 582                 goto err_eeprom;
 583         }
 584
 585         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 586
 587         e1000_get_bus_info(&adapter->hw);
 588
 589         init_timer(&adapter->tx_fifo_stall_timer);
 590         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 591         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 592
 593         init_timer(&adapter->watchdog_timer);
 594         adapter->watchdog_timer.function = &e1000_watchdog;
 595         adapter->watchdog_timer.data = (unsigned long) adapter;
 596
 597         INIT_WORK(&adapter->watchdog_task,
 598                 (void (*)(void *))e1000_watchdog_task, adapter);
 599
 600         init_timer(&adapter->phy_info_timer);
 601         adapter->phy_info_timer.function = &e1000_update_phy_info;
 602         adapter->phy_info_timer.data = (unsigned long) adapter;
 603
 604         INIT_WORK(&adapter->tx_timeout_task,
 605                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 606
 607         /* we're going to reset, so assume we have no link for now */
 608
 609         netif_carrier_off(netdev);
 610         netif_stop_queue(netdev);
 611
 612         e1000_check_options(adapter);
 613
 614         /* Initial Wake on LAN setting
 615          * If APM wake is enabled in the EEPROM,
 616          * enable the ACPI Magic Packet filter
 617          */
 618
 619         switch(adapter->hw.mac_type) {
 620         case e1000_82542_rev2_0:
 621         case e1000_82542_rev2_1:
 622         case e1000_82543:
 623                 break;
 624         case e1000_82544:
 625                 e1000_read_eeprom(&adapter->hw,
 626                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 627                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 628                 break;
 629         case e1000_82546:
 630         case e1000_82546_rev_3:
 631                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 632                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 633                         e1000_read_eeprom(&adapter->hw,
 634                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 635                         break;
 636                 }
 637                 /* Fall Through */
 638         default:
 639                 e1000_read_eeprom(&adapter->hw,
 640                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 641                 break;
 642         }
 643         if(eeprom_data & eeprom_apme_mask)
 644                 adapter->wol |= E1000_WUFC_MAG;
 645
 646         /* reset the hardware with the new settings */
 647         e1000_reset(adapter);
 648
 649         strcpy(netdev->name, "eth%d");
 650         if((err = register_netdev(netdev)))
 651                 goto err_register;
 652
 653         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 654
 655         cards_found++;
 656         return 0;
 657
 658 err_register:
 659 err_sw_init:
 660 err_eeprom:
 661         iounmap(adapter->hw.hw_addr);
 662 err_ioremap:
 663         free_netdev(netdev);
 664 err_alloc_etherdev:
 665         pci_release_regions(pdev);
 666         return err;
 667 }
 668
 669 /**
 670  * e1000_remove - Device Removal Routine
 671  * @pdev: PCI device information struct
 672  *
 673  * e1000_remove is called by the PCI subsystem to alert the driver
 674  * that it should release a PCI device.  The could be caused by a
 675  * Hot-Plug event, or because the driver is going to be removed from
 676  * memory.
 677  **/
 678
 679 static void __devexit
 680 e1000_remove(struct pci_dev *pdev)
 681 {
 682         struct net_device *netdev = pci_get_drvdata(pdev);
 683         struct e1000_adapter *adapter = netdev->priv;
 684         uint32_t manc;
 685
 686         flush_scheduled_work();
 687
 688         if(adapter->hw.mac_type >= e1000_82540 &&
 689            adapter->hw.media_type == e1000_media_type_copper) {
 690                 manc = E1000_READ_REG(&adapter->hw, MANC);
 691                 if(manc & E1000_MANC_SMBUS_EN) {
 692                         manc |= E1000_MANC_ARP_EN;
 693                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 694                 }
 695         }
 696
 697         unregister_netdev(netdev);
 698
 699         e1000_phy_hw_reset(&adapter->hw);
 700
 701         iounmap(adapter->hw.hw_addr);
 702         pci_release_regions(pdev);
 703
 704         free_netdev(netdev);
 705
 706         pci_disable_device(pdev);
 707 }
 708
 709 /**
 710  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 711  * @adapter: board private structure to initialize
 712  *
 713  * e1000_sw_init initializes the Adapter private data structure.
 714  * Fields are initialized based on PCI device information and
 715  * OS network device settings (MTU size).
 716  **/
 717
 718 static int __devinit
 719 e1000_sw_init(struct e1000_adapter *adapter)
 720 {
 721         struct e1000_hw *hw = &adapter->hw;
 722         struct net_device *netdev = adapter->netdev;
 723         struct pci_dev *pdev = adapter->pdev;
 724
 725         /* PCI config space info */
 726
 727         hw->vendor_id = pdev->vendor;
 728         hw->device_id = pdev->device;
 729         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 730         hw->subsystem_id = pdev->subsystem_device;
 731
 732         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 733
 734         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 735
 736         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 737         hw->max_frame_size = netdev->mtu +
 738                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 739         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 740
 741         /* identify the MAC */
 742
 743         if(e1000_set_mac_type(hw)) {
 744                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 745                 return -EIO;
 746         }
 747
 748         /* initialize eeprom parameters */
 749
 750         e1000_init_eeprom_params(hw);
 751
 752         switch(hw->mac_type) {
 753         default:
 754                 break;
 755         case e1000_82541:
 756         case e1000_82547:
 757         case e1000_82541_rev_2:
 758         case e1000_82547_rev_2:
 759                 hw->phy_init_script = 1;
 760                 break;
 761         }
 762
 763         e1000_set_media_type(hw);
 764
 765         hw->wait_autoneg_complete = FALSE;
 766         hw->tbi_compatibility_en = TRUE;
 767         hw->adaptive_ifs = TRUE;
 768
 769         /* Copper options */
 770
 771         if(hw->media_type == e1000_media_type_copper) {
 772                 hw->mdix = AUTO_ALL_MODES;
 773                 hw->disable_polarity_correction = FALSE;
 774                 hw->master_slave = E1000_MASTER_SLAVE;
 775         }
 776
 777         atomic_set(&adapter->irq_sem, 1);
 778         spin_lock_init(&adapter->stats_lock);
 779         spin_lock_init(&adapter->tx_lock);
 780
 781         return 0;
 782 }
 783
 784 /**
 785  * e1000_open - Called when a network interface is made active
 786  * @netdev: network interface device structure
 787  *
 788  * Returns 0 on success, negative value on failure
 789  *
 790  * The open entry point is called when a network interface is made
 791  * active by the system (IFF_UP).  At this point all resources needed
 792  * for transmit and receive operations are allocated, the interrupt
 793  * handler is registered with the OS, the watchdog timer is started,
 794  * and the stack is notified that the interface is ready.
 795  **/
 796
 797 static int
 798 e1000_open(struct net_device *netdev)
 799 {
 800         struct e1000_adapter *adapter = netdev->priv;
 801         int err;
 802
 803         /* allocate transmit descriptors */
 804
 805         if((err = e1000_setup_tx_resources(adapter)))
 806                 goto err_setup_tx;
 807
 808         /* allocate receive descriptors */
 809
 810         if((err = e1000_setup_rx_resources(adapter)))
 811                 goto err_setup_rx;
 812
 813         if((err = e1000_up(adapter)))
 814                 goto err_up;
 815
 816         return E1000_SUCCESS;
 817
 818 err_up:
 819         e1000_free_rx_resources(adapter);
 820 err_setup_rx:
 821         e1000_free_tx_resources(adapter);
 822 err_setup_tx:
 823         e1000_reset(adapter);
 824
 825         return err;
 826 }
 827
 828 /**
 829  * e1000_close - Disables a network interface
 830  * @netdev: network interface device structure
 831  *
 832  * Returns 0, this is not allowed to fail
 833  *
 834  * The close entry point is called when an interface is de-activated
 835  * by the OS.  The hardware is still under the drivers control, but
 836  * needs to be disabled.  A global MAC reset is issued to stop the
 837  * hardware, and all transmit and receive resources are freed.
 838  **/
 839
 840 static int
 841 e1000_close(struct net_device *netdev)
 842 {
 843         struct e1000_adapter *adapter = netdev->priv;
 844
 845         e1000_down(adapter);
 846
 847         e1000_free_tx_resources(adapter);
 848         e1000_free_rx_resources(adapter);
 849
 850         return 0;
 851 }
 852
 853 /**
 854  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
 855  * @adapter: address of board private structure
 856  * @begin: address of beginning of memory
 857  * @end: address of end of memory
 858  **/
 859 static inline boolean_t
 860 e1000_check_64k_bound(struct e1000_adapter *adapter,
 861                       void *start, unsigned long len)
 862 {
 863         unsigned long begin = (unsigned long) start;
 864         unsigned long end = begin + len;
 865
 866         /* first rev 82545 and 82546 need to not allow any memory
 867          * write location to cross a 64k boundary due to errata 23 */
 868         if (adapter->hw.mac_type == e1000_82545 ||
 869             adapter->hw.mac_type == e1000_82546 ) {
 870
 871                 /* check buffer doesn't cross 64kB */
 872                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
 873         }
 874
 875         return TRUE;
 876 }
 877
 878 /**
 879  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
 880  * @adapter: board private structure
 881  *
 882  * Return 0 on success, negative on failure
 883  **/
 884
 885 int
 886 e1000_setup_tx_resources(struct e1000_adapter *adapter)
 887 {
 888         struct e1000_desc_ring *txdr = &adapter->tx_ring;
 889         struct pci_dev *pdev = adapter->pdev;
 890         int size;
 891
 892         size = sizeof(struct e1000_buffer) * txdr->count;
 893         txdr->buffer_info = vmalloc(size);
 894         if(!txdr->buffer_info) {
 895                 DPRINTK(PROBE, ERR,
 896                 "Unable to Allocate Memory for the Transmit descriptor ring\n");
 897                 return -ENOMEM;
 898         }
 899         memset(txdr->buffer_info, 0, size);
 900
 901         /* round up to nearest 4K */
 902
 903         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
 904         E1000_ROUNDUP(txdr->size, 4096);
 905
 906         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 907         if(!txdr->desc) {
 908 setup_tx_desc_die:
 909                 DPRINTK(PROBE, ERR,
 910                 "Unable to Allocate Memory for the Transmit descriptor ring\n");
 911                 vfree(txdr->buffer_info);
 912                 return -ENOMEM;
 913         }
 914
 915         /* fix for errata 23, cant cross 64kB boundary */
 916         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
 917                 void *olddesc = txdr->desc;
 918                 dma_addr_t olddma = txdr->dma;
 919                 DPRINTK(TX_ERR,ERR,"txdr align check failed: %u bytes at %p\n",
 920                         txdr->size, txdr->desc);
 921                 /* try again, without freeing the previous */
 922                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 923                 /* failed allocation, critial failure */
 924                 if(!txdr->desc) {
 925                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
 926                         goto setup_tx_desc_die;
 927                 }
 928
 929                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
 930                         /* give up */
 931                         pci_free_consistent(pdev, txdr->size,
 932                              txdr->desc, txdr->dma);
 933                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
 934                         DPRINTK(PROBE, ERR,
 935                          "Unable to Allocate aligned Memory for the Transmit"
 936                          " descriptor ring\n");
 937                         vfree(txdr->buffer_info);
 938                         return -ENOMEM;
 939                 } else {
 940                         /* free old, move on with the new one since its okay */
 941                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
 942                 }
 943         }
 944         memset(txdr->desc, 0, txdr->size);
 945
 946         txdr->next_to_use = 0;
 947         txdr->next_to_clean = 0;
 948
 949         return 0;
 950 }
 951
 952 /**
 953  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
 954  * @adapter: board private structure
 955  *
 956  * Configure the Tx unit of the MAC after a reset.
 957  **/
 958
 959 static void
 960 e1000_configure_tx(struct e1000_adapter *adapter)
 961 {
 962         uint64_t tdba = adapter->tx_ring.dma;
 963         uint32_t tdlen = adapter->tx_ring.count * sizeof(struct e1000_tx_desc);
 964         uint32_t tctl, tipg;
 965
 966         E1000_WRITE_REG(&adapter->hw, TDBAL, (tdba & 0x00000000ffffffffULL));
 967         E1000_WRITE_REG(&adapter->hw, TDBAH, (tdba >> 32));
 968
 969         E1000_WRITE_REG(&adapter->hw, TDLEN, tdlen);
 970
 971         /* Setup the HW Tx Head and Tail descriptor pointers */
 972
 973         E1000_WRITE_REG(&adapter->hw, TDH, 0);
 974         E1000_WRITE_REG(&adapter->hw, TDT, 0);
 975
 976         /* Set the default values for the Tx Inter Packet Gap timer */
 977
 978         switch (adapter->hw.mac_type) {
 979         case e1000_82542_rev2_0:
 980         case e1000_82542_rev2_1:
 981                 tipg = DEFAULT_82542_TIPG_IPGT;
 982                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
 983                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
 984                 break;
 985         default:
 986                 if(adapter->hw.media_type == e1000_media_type_fiber ||
 987                    adapter->hw.media_type == e1000_media_type_internal_serdes)
 988                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
 989                 else
 990                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
 991                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
 992                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
 993         }
 994         E1000_WRITE_REG(&adapter->hw, TIPG, tipg);
 995
 996         /* Set the Tx Interrupt Delay register */
 997
 998         E1000_WRITE_REG(&adapter->hw, TIDV, adapter->tx_int_delay);
 999         if(adapter->hw.mac_type >= e1000_82540)
1000                 E1000_WRITE_REG(&adapter->hw, TADV, adapter->tx_abs_int_delay);
1001
1002         /* Program the Transmit Control Register */
1003
1004         tctl = E1000_READ_REG(&adapter->hw, TCTL);
1005
1006         tctl &= ~E1000_TCTL_CT;
1007         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP |
1008                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1009
1010         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1011
1012         e1000_config_collision_dist(&adapter->hw);
1013
1014         /* Setup Transmit Descriptor Settings for eop descriptor */
1015         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1016                 E1000_TXD_CMD_IFCS;
1017
1018         if(adapter->hw.mac_type < e1000_82543)
1019                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1020         else
1021                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1022
1023         /* Cache if we're 82544 running in PCI-X because we'll
1024          * need this to apply a workaround later in the send path. */
1025         if(adapter->hw.mac_type == e1000_82544 &&
1026            adapter->hw.bus_type == e1000_bus_type_pcix)
1027                 adapter->pcix_82544 = 1;
1028 }
1029
1030 /**
1031  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1032  * @adapter: board private structure
1033  *
1034  * Returns 0 on success, negative on failure
1035  **/
1036
1037 int
1038 e1000_setup_rx_resources(struct e1000_adapter *adapter)
1039 {
1040         struct e1000_desc_ring *rxdr = &adapter->rx_ring;
1041         struct pci_dev *pdev = adapter->pdev;
1042         int size;
1043
1044         size = sizeof(struct e1000_buffer) * rxdr->count;
1045         rxdr->buffer_info = vmalloc(size);
1046         if(!rxdr->buffer_info) {
1047                 DPRINTK(PROBE, ERR,
1048                 "Unable to Allocate Memory for the Recieve descriptor ring\n");
1049                 return -ENOMEM;
1050         }
1051         memset(rxdr->buffer_info, 0, size);
1052
1053         /* Round up to nearest 4K */
1054
1055         rxdr->size = rxdr->count * sizeof(struct e1000_rx_desc);
1056         E1000_ROUNDUP(rxdr->size, 4096);
1057
1058         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1059
1060         if(!rxdr->desc) {
1061 setup_rx_desc_die:
1062                 DPRINTK(PROBE, ERR,
1063                 "Unble to Allocate Memory for the Recieve descriptor ring\n");
1064                 vfree(rxdr->buffer_info);
1065                 return -ENOMEM;
1066         }
1067
1068         /* fix for errata 23, cant cross 64kB boundary */
1069         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1070                 void *olddesc = rxdr->desc;
1071                 dma_addr_t olddma = rxdr->dma;
1072                 DPRINTK(RX_ERR,ERR,
1073                         "rxdr align check failed: %u bytes at %p\n",
1074                         rxdr->size, rxdr->desc);
1075                 /* try again, without freeing the previous */
1076                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1077                 /* failed allocation, critial failure */
1078                 if(!rxdr->desc) {
1079                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1080                         goto setup_rx_desc_die;
1081                 }
1082
1083                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1084                         /* give up */
1085                         pci_free_consistent(pdev, rxdr->size,
1086                              rxdr->desc, rxdr->dma);
1087                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1088                         DPRINTK(PROBE, ERR,
1089                                 "Unable to Allocate aligned Memory for the"
1090                                 " Receive descriptor ring\n");
1091                         vfree(rxdr->buffer_info);
1092                         return -ENOMEM;
1093                 } else {
1094                         /* free old, move on with the new one since its okay */
1095                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1096                 }
1097         }
1098         memset(rxdr->desc, 0, rxdr->size);
1099
1100         rxdr->next_to_clean = 0;
1101         rxdr->next_to_use = 0;
1102
1103         return 0;
1104 }
1105
1106 /**
1107  * e1000_setup_rctl - configure the receive control register
1108  * @adapter: Board private structure
1109  **/
1110
1111 static void
1112 e1000_setup_rctl(struct e1000_adapter *adapter)
1113 {
1114         uint32_t rctl;
1115
1116         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1117
1118         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1119
1120         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1121                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1122                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1123
1124         if(adapter->hw.tbi_compatibility_on == 1)
1125                 rctl |= E1000_RCTL_SBP;
1126         else
1127                 rctl &= ~E1000_RCTL_SBP;
1128
1129         /* Setup buffer sizes */
1130         rctl &= ~(E1000_RCTL_SZ_4096);
1131         rctl |= (E1000_RCTL_BSEX | E1000_RCTL_LPE);
1132         switch (adapter->rx_buffer_len) {
1133         case E1000_RXBUFFER_2048:
1134         default:
1135                 rctl |= E1000_RCTL_SZ_2048;
1136                 rctl &= ~(E1000_RCTL_BSEX | E1000_RCTL_LPE);
1137                 break;
1138         case E1000_RXBUFFER_4096:
1139                 rctl |= E1000_RCTL_SZ_4096;
1140                 break;
1141         case E1000_RXBUFFER_8192:
1142                 rctl |= E1000_RCTL_SZ_8192;
1143                 break;
1144         case E1000_RXBUFFER_16384:
1145                 rctl |= E1000_RCTL_SZ_16384;
1146                 break;
1147         }
1148
1149         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1150 }
1151
1152 /**
1153  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1154  * @adapter: board private structure
1155  *
1156  * Configure the Rx unit of the MAC after a reset.
1157  **/
1158
1159 static void
1160 e1000_configure_rx(struct e1000_adapter *adapter)
1161 {
1162         uint64_t rdba = adapter->rx_ring.dma;
1163         uint32_t rdlen = adapter->rx_ring.count * sizeof(struct e1000_rx_desc);
1164         uint32_t rctl;
1165         uint32_t rxcsum;
1166
1167         /* disable receives while setting up the descriptors */
1168         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1169         E1000_WRITE_REG(&adapter->hw, RCTL, rctl & ~E1000_RCTL_EN);
1170
1171         /* set the Receive Delay Timer Register */
1172         E1000_WRITE_REG(&adapter->hw, RDTR, adapter->rx_int_delay);
1173
1174         if(adapter->hw.mac_type >= e1000_82540) {
1175                 E1000_WRITE_REG(&adapter->hw, RADV, adapter->rx_abs_int_delay);
1176                 if(adapter->itr > 1)
1177                         E1000_WRITE_REG(&adapter->hw, ITR,
1178                                 1000000000 / (adapter->itr * 256));
1179         }
1180
1181         /* Setup the Base and Length of the Rx Descriptor Ring */
1182         E1000_WRITE_REG(&adapter->hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1183         E1000_WRITE_REG(&adapter->hw, RDBAH, (rdba >> 32));
1184
1185         E1000_WRITE_REG(&adapter->hw, RDLEN, rdlen);
1186
1187         /* Setup the HW Rx Head and Tail Descriptor Pointers */
1188         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1189         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1190
1191         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1192         if((adapter->hw.mac_type >= e1000_82543) &&
1193            (adapter->rx_csum == TRUE)) {
1194                 rxcsum = E1000_READ_REG(&adapter->hw, RXCSUM);
1195                 rxcsum |= E1000_RXCSUM_TUOFL;
1196                 E1000_WRITE_REG(&adapter->hw, RXCSUM, rxcsum);
1197         }
1198
1199         /* Enable Receives */
1200         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1201 }
1202
1203 /**
1204  * e1000_free_tx_resources - Free Tx Resources
1205  * @adapter: board private structure
1206  *
1207  * Free all transmit software resources
1208  **/
1209
1210 void
1211 e1000_free_tx_resources(struct e1000_adapter *adapter)
1212 {
1213         struct pci_dev *pdev = adapter->pdev;
1214
1215         e1000_clean_tx_ring(adapter);
1216
1217         vfree(adapter->tx_ring.buffer_info);
1218         adapter->tx_ring.buffer_info = NULL;
1219
1220         pci_free_consistent(pdev, adapter->tx_ring.size,
1221                             adapter->tx_ring.desc, adapter->tx_ring.dma);
1222
1223         adapter->tx_ring.desc = NULL;
1224 }
1225
1226 static inline void
1227 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1228                         struct e1000_buffer *buffer_info)
1229 {
1230         struct pci_dev *pdev = adapter->pdev;
1231
1232         if(buffer_info->dma) {
1233                 pci_unmap_page(pdev,
1234                                buffer_info->dma,
1235                                buffer_info->length,
1236                                PCI_DMA_TODEVICE);
1237                 buffer_info->dma = 0;
1238         }
1239         if(buffer_info->skb) {
1240                 dev_kfree_skb_any(buffer_info->skb);
1241                 buffer_info->skb = NULL;
1242         }
1243 }
1244
1245 /**
1246  * e1000_clean_tx_ring - Free Tx Buffers
1247  * @adapter: board private structure
1248  **/
1249
1250 static void
1251 e1000_clean_tx_ring(struct e1000_adapter *adapter)
1252 {
1253         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1254         struct e1000_buffer *buffer_info;
1255         unsigned long size;
1256         unsigned int i;
1257
1258         /* Free all the Tx ring sk_buffs */
1259
1260         if (likely(adapter->previous_buffer_info.skb != NULL)) {
1261                 e1000_unmap_and_free_tx_resource(adapter,
1262                                 &adapter->previous_buffer_info);
1263         }
1264
1265         for(i = 0; i < tx_ring->count; i++) {
1266                 buffer_info = &tx_ring->buffer_info[i];
1267                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1268         }
1269
1270         size = sizeof(struct e1000_buffer) * tx_ring->count;
1271         memset(tx_ring->buffer_info, 0, size);
1272
1273         /* Zero out the descriptor ring */
1274
1275         memset(tx_ring->desc, 0, tx_ring->size);
1276
1277         tx_ring->next_to_use = 0;
1278         tx_ring->next_to_clean = 0;
1279
1280         E1000_WRITE_REG(&adapter->hw, TDH, 0);
1281         E1000_WRITE_REG(&adapter->hw, TDT, 0);
1282 }
1283
1284 /**
1285  * e1000_free_rx_resources - Free Rx Resources
1286  * @adapter: board private structure
1287  *
1288  * Free all receive software resources
1289  **/
1290
1291 void
1292 e1000_free_rx_resources(struct e1000_adapter *adapter)
1293 {
1294         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1295         struct pci_dev *pdev = adapter->pdev;
1296
1297         e1000_clean_rx_ring(adapter);
1298
1299         vfree(rx_ring->buffer_info);
1300         rx_ring->buffer_info = NULL;
1301
1302         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1303
1304         rx_ring->desc = NULL;
1305 }
1306
1307 /**
1308  * e1000_clean_rx_ring - Free Rx Buffers
1309  * @adapter: board private structure
1310  **/
1311
1312 static void
1313 e1000_clean_rx_ring(struct e1000_adapter *adapter)
1314 {
1315         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1316         struct e1000_buffer *buffer_info;
1317         struct pci_dev *pdev = adapter->pdev;
1318         unsigned long size;
1319         unsigned int i;
1320
1321         /* Free all the Rx ring sk_buffs */
1322
1323         for(i = 0; i < rx_ring->count; i++) {
1324                 buffer_info = &rx_ring->buffer_info[i];
1325                 if(buffer_info->skb) {
1326
1327                         pci_unmap_single(pdev,
1328                                          buffer_info->dma,
1329                                          buffer_info->length,
1330                                          PCI_DMA_FROMDEVICE);
1331
1332                         dev_kfree_skb(buffer_info->skb);
1333                         buffer_info->skb = NULL;
1334                 }
1335         }
1336
1337         size = sizeof(struct e1000_buffer) * rx_ring->count;
1338         memset(rx_ring->buffer_info, 0, size);
1339
1340         /* Zero out the descriptor ring */
1341
1342         memset(rx_ring->desc, 0, rx_ring->size);
1343
1344         rx_ring->next_to_clean = 0;
1345         rx_ring->next_to_use = 0;
1346
1347         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1348         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1349 }
1350
1351 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1352  * and memory write and invalidate disabled for certain operations
1353  */
1354 static void
1355 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1356 {
1357         struct net_device *netdev = adapter->netdev;
1358         uint32_t rctl;
1359
1360         e1000_pci_clear_mwi(&adapter->hw);
1361
1362         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1363         rctl |= E1000_RCTL_RST;
1364         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1365         E1000_WRITE_FLUSH(&adapter->hw);
1366         mdelay(5);
1367
1368         if(netif_running(netdev))
1369                 e1000_clean_rx_ring(adapter);
1370 }
1371
1372 static void
1373 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1374 {
1375         struct net_device *netdev = adapter->netdev;
1376         uint32_t rctl;
1377
1378         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1379         rctl &= ~E1000_RCTL_RST;
1380         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1381         E1000_WRITE_FLUSH(&adapter->hw);
1382         mdelay(5);
1383
1384         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1385                 e1000_pci_set_mwi(&adapter->hw);
1386
1387         if(netif_running(netdev)) {
1388                 e1000_configure_rx(adapter);
1389                 e1000_alloc_rx_buffers(adapter);
1390         }
1391 }
1392
1393 /**
1394  * e1000_set_mac - Change the Ethernet Address of the NIC
1395  * @netdev: network interface device structure
1396  * @p: pointer to an address structure
1397  *
1398  * Returns 0 on success, negative on failure
1399  **/
1400
1401 static int
1402 e1000_set_mac(struct net_device *netdev, void *p)
1403 {
1404         struct e1000_adapter *adapter = netdev->priv;
1405         struct sockaddr *addr = p;
1406
1407         if(!is_valid_ether_addr(addr->sa_data))
1408                 return -EADDRNOTAVAIL;
1409
1410         /* 82542 2.0 needs to be in reset to write receive address registers */
1411
1412         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1413                 e1000_enter_82542_rst(adapter);
1414
1415         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1416         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1417
1418         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
1419
1420         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1421                 e1000_leave_82542_rst(adapter);
1422
1423         return 0;
1424 }
1425
1426 /**
1427  * e1000_set_multi - Multicast and Promiscuous mode set
1428  * @netdev: network interface device structure
1429  *
1430  * The set_multi entry point is called whenever the multicast address
1431  * list or the network interface flags are updated.  This routine is
1432  * responsible for configuring the hardware for proper multicast,
1433  * promiscuous mode, and all-multi behavior.
1434  **/
1435
1436 static void
1437 e1000_set_multi(struct net_device *netdev)
1438 {
1439         struct e1000_adapter *adapter = netdev->priv;
1440         struct e1000_hw *hw = &adapter->hw;
1441         struct dev_mc_list *mc_ptr;
1442         uint32_t rctl;
1443         uint32_t hash_value;
1444         int i;
1445         unsigned long flags;
1446
1447         /* Check for Promiscuous and All Multicast modes */
1448
1449         spin_lock_irqsave(&adapter->tx_lock, flags);
1450
1451         rctl = E1000_READ_REG(hw, RCTL);
1452
1453         if(netdev->flags & IFF_PROMISC) {
1454                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
1455         } else if(netdev->flags & IFF_ALLMULTI) {
1456                 rctl |= E1000_RCTL_MPE;
1457                 rctl &= ~E1000_RCTL_UPE;
1458         } else {
1459                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
1460         }
1461
1462         E1000_WRITE_REG(hw, RCTL, rctl);
1463
1464         /* 82542 2.0 needs to be in reset to write receive address registers */
1465
1466         if(hw->mac_type == e1000_82542_rev2_0)
1467                 e1000_enter_82542_rst(adapter);
1468
1469         /* load the first 14 multicast address into the exact filters 1-14
1470          * RAR 0 is used for the station MAC adddress
1471          * if there are not 14 addresses, go ahead and clear the filters
1472          */
1473         mc_ptr = netdev->mc_list;
1474
1475         for(i = 1; i < E1000_RAR_ENTRIES; i++) {
1476                 if(mc_ptr) {
1477                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
1478                         mc_ptr = mc_ptr->next;
1479                 } else {
1480                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
1481                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
1482                 }
1483         }
1484
1485         /* clear the old settings from the multicast hash table */
1486
1487         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
1488                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
1489
1490         /* load any remaining addresses into the hash table */
1491
1492         for(; mc_ptr; mc_ptr = mc_ptr->next) {
1493                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
1494                 e1000_mta_set(hw, hash_value);
1495         }
1496
1497         if(hw->mac_type == e1000_82542_rev2_0)
1498                 e1000_leave_82542_rst(adapter);
1499
1500         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1501 }
1502
1503 /* Need to wait a few seconds after link up to get diagnostic information from
1504  * the phy */
1505
1506 static void
1507 e1000_update_phy_info(unsigned long data)
1508 {
1509         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1510         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
1511 }
1512
1513 /**
1514  * e1000_82547_tx_fifo_stall - Timer Call-back
1515  * @data: pointer to adapter cast into an unsigned long
1516  **/
1517
1518 static void
1519 e1000_82547_tx_fifo_stall(unsigned long data)
1520 {
1521         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1522         struct net_device *netdev = adapter->netdev;
1523         uint32_t tctl;
1524
1525         if(atomic_read(&adapter->tx_fifo_stall)) {
1526                 if((E1000_READ_REG(&adapter->hw, TDT) ==
1527                     E1000_READ_REG(&adapter->hw, TDH)) &&
1528                    (E1000_READ_REG(&adapter->hw, TDFT) ==
1529                     E1000_READ_REG(&adapter->hw, TDFH)) &&
1530                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
1531                     E1000_READ_REG(&adapter->hw, TDFHS))) {
1532                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
1533                         E1000_WRITE_REG(&adapter->hw, TCTL,
1534                                         tctl & ~E1000_TCTL_EN);
1535                         E1000_WRITE_REG(&adapter->hw, TDFT,
1536                                         adapter->tx_head_addr);
1537                         E1000_WRITE_REG(&adapter->hw, TDFH,
1538                                         adapter->tx_head_addr);
1539                         E1000_WRITE_REG(&adapter->hw, TDFTS,
1540                                         adapter->tx_head_addr);
1541                         E1000_WRITE_REG(&adapter->hw, TDFHS,
1542                                         adapter->tx_head_addr);
1543                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1544                         E1000_WRITE_FLUSH(&adapter->hw);
1545
1546                         adapter->tx_fifo_head = 0;
1547                         atomic_set(&adapter->tx_fifo_stall, 0);
1548                         netif_wake_queue(netdev);
1549                 } else {
1550                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
1551                 }
1552         }
1553 }
1554
1555 /**
1556  * e1000_watchdog - Timer Call-back
1557  * @data: pointer to adapter cast into an unsigned long
1558  **/
1559 static void
1560 e1000_watchdog(unsigned long data)
1561 {
1562         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1563
1564         /* Do the rest outside of interrupt context */
1565         schedule_work(&adapter->watchdog_task);
1566 }
1567
1568 static void
1569 e1000_watchdog_task(struct e1000_adapter *adapter)
1570 {
1571         struct net_device *netdev = adapter->netdev;
1572         struct e1000_desc_ring *txdr = &adapter->tx_ring;
1573         uint32_t link;
1574
1575         e1000_check_for_link(&adapter->hw);
1576
1577         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1578            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
1579                 link = !adapter->hw.serdes_link_down;
1580         else
1581                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
1582
1583         if(link) {
1584                 if(!netif_carrier_ok(netdev)) {
1585                         e1000_get_speed_and_duplex(&adapter->hw,
1586                                                    &adapter->link_speed,
1587                                                    &adapter->link_duplex);
1588
1589                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
1590                                adapter->link_speed,
1591                                adapter->link_duplex == FULL_DUPLEX ?
1592                                "Full Duplex" : "Half Duplex");
1593
1594                         netif_carrier_on(netdev);
1595                         netif_wake_queue(netdev);
1596                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1597                         adapter->smartspeed = 0;
1598                 }
1599         } else {
1600                 if(netif_carrier_ok(netdev)) {
1601                         adapter->link_speed = 0;
1602                         adapter->link_duplex = 0;
1603                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
1604                         netif_carrier_off(netdev);
1605                         netif_stop_queue(netdev);
1606                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1607                 }
1608
1609                 e1000_smartspeed(adapter);
1610         }
1611
1612         e1000_update_stats(adapter);
1613
1614         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
1615         adapter->tpt_old = adapter->stats.tpt;
1616         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
1617         adapter->colc_old = adapter->stats.colc;
1618
1619         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
1620         adapter->gorcl_old = adapter->stats.gorcl;
1621         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
1622         adapter->gotcl_old = adapter->stats.gotcl;
1623
1624         e1000_update_adaptive(&adapter->hw);
1625
1626         if(!netif_carrier_ok(netdev)) {
1627                 if(E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1628                         /* We've lost link, so the controller stops DMA,
1629                          * but we've got queued Tx work that's never going
1630                          * to get done, so reset controller to flush Tx.
1631                          * (Do the reset outside of interrupt context). */
1632                         schedule_work(&adapter->tx_timeout_task);
1633                 }
1634         }
1635
1636         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
1637         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
1638                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
1639                  * asymmetrical Tx or Rx gets ITR=8000; everyone
1640                  * else is between 2000-8000. */
1641                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
1642                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
1643                         adapter->gotcl - adapter->gorcl :
1644                         adapter->gorcl - adapter->gotcl) / 10000;
1645                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
1646                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
1647         }
1648
1649         /* Cause software interrupt to ensure rx ring is cleaned */
1650         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
1651
1652         /* Force detection of hung controller every watchdog period*/
1653         adapter->detect_tx_hung = TRUE;
1654
1655         /* Reset the timer */
1656         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1657 }
1658
1659 #define E1000_TX_FLAGS_CSUM             0x00000001
1660 #define E1000_TX_FLAGS_VLAN             0x00000002
1661 #define E1000_TX_FLAGS_TSO              0x00000004
1662 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
1663 #define E1000_TX_FLAGS_VLAN_SHIFT       16
1664
1665 static inline int
1666 e1000_tso(struct e1000_adapter *adapter, struct sk_buff *skb)
1667 {
1668 #ifdef NETIF_F_TSO
1669         struct e1000_context_desc *context_desc;
1670         unsigned int i;
1671         uint32_t cmd_length = 0;
1672         uint16_t ipcse, tucse, mss;
1673         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1674         int err;
1675
1676         if(skb_shinfo(skb)->tso_size) {
1677                 if (skb_header_cloned(skb)) {
1678                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1679                         if (err)
1680                                 return err;
1681                 }
1682
1683                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1684                 mss = skb_shinfo(skb)->tso_size;
1685                 skb->nh.iph->tot_len = 0;
1686                 skb->nh.iph->check = 0;
1687                 skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
1688                                                       skb->nh.iph->daddr,
1689                                                       0,
1690                                                       IPPROTO_TCP,
1691                                                       0);
1692                 ipcss = skb->nh.raw - skb->data;
1693                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1694                 ipcse = skb->h.raw - skb->data - 1;
1695                 tucss = skb->h.raw - skb->data;
1696                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1697                 tucse = 0;
1698
1699                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
1700                                E1000_TXD_CMD_IP | E1000_TXD_CMD_TCP |
1701                                (skb->len - (hdr_len)));
1702
1703                 i = adapter->tx_ring.next_to_use;
1704                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1705
1706                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
1707                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
1708                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
1709                 context_desc->upper_setup.tcp_fields.tucss = tucss;
1710                 context_desc->upper_setup.tcp_fields.tucso = tucso;
1711                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
1712                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
1713                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
1714                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
1715
1716                 if(++i == adapter->tx_ring.count) i = 0;
1717                 adapter->tx_ring.next_to_use = i;
1718
1719                 return 1;
1720         }
1721 #endif
1722
1723         return 0;
1724 }
1725
1726 static inline boolean_t
1727 e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
1728 {
1729         struct e1000_context_desc *context_desc;
1730         unsigned int i;
1731         uint8_t css;
1732
1733         if(likely(skb->ip_summed == CHECKSUM_HW)) {
1734                 css = skb->h.raw - skb->data;
1735
1736                 i = adapter->tx_ring.next_to_use;
1737                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1738
1739                 context_desc->upper_setup.tcp_fields.tucss = css;
1740                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
1741                 context_desc->upper_setup.tcp_fields.tucse = 0;
1742                 context_desc->tcp_seg_setup.data = 0;
1743                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
1744
1745                 if(unlikely(++i == adapter->tx_ring.count)) i = 0;
1746                 adapter->tx_ring.next_to_use = i;
1747
1748                 return TRUE;
1749         }
1750
1751         return FALSE;
1752 }
1753
1754 #define E1000_MAX_TXD_PWR       12
1755 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
1756
1757 static inline int
1758 e1000_tx_map(struct e1000_adapter *adapter, struct sk_buff *skb,
1759         unsigned int first, unsigned int max_per_txd,
1760         unsigned int nr_frags, unsigned int mss)
1761 {
1762         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1763         struct e1000_buffer *buffer_info;
1764         unsigned int len = skb->len;
1765         unsigned int offset = 0, size, count = 0, i;
1766         unsigned int f;
1767         len -= skb->data_len;
1768
1769         i = tx_ring->next_to_use;
1770
1771         while(len) {
1772                 buffer_info = &tx_ring->buffer_info[i];
1773                 size = min(len, max_per_txd);
1774 #ifdef NETIF_F_TSO
1775                 /* Workaround for premature desc write-backs
1776                  * in TSO mode.  Append 4-byte sentinel desc */
1777                 if(unlikely(mss && !nr_frags && size == len && size > 8))
1778                         size -= 4;
1779 #endif
1780                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
1781                  * terminating buffers within evenly-aligned dwords. */
1782                 if(unlikely(adapter->pcix_82544 &&
1783                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
1784                    size > 4))
1785                         size -= 4;
1786
1787                 buffer_info->length = size;
1788                 buffer_info->dma =
1789                         pci_map_single(adapter->pdev,
1790                                 skb->data + offset,
1791                                 size,
1792                                 PCI_DMA_TODEVICE);
1793                 buffer_info->time_stamp = jiffies;
1794
1795                 len -= size;
1796                 offset += size;
1797                 count++;
1798                 if(unlikely(++i == tx_ring->count)) i = 0;
1799         }
1800
1801         for(f = 0; f < nr_frags; f++) {
1802                 struct skb_frag_struct *frag;
1803
1804                 frag = &skb_shinfo(skb)->frags[f];
1805                 len = frag->size;
1806                 offset = frag->page_offset;
1807
1808                 while(len) {
1809                         buffer_info = &tx_ring->buffer_info[i];
1810                         size = min(len, max_per_txd);
1811 #ifdef NETIF_F_TSO
1812                         /* Workaround for premature desc write-backs
1813                          * in TSO mode.  Append 4-byte sentinel desc */
1814                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
1815                                 size -= 4;
1816 #endif
1817                         /* Workaround for potential 82544 hang in PCI-X.
1818                          * Avoid terminating buffers within evenly-aligned
1819                          * dwords. */
1820                         if(unlikely(adapter->pcix_82544 &&
1821                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
1822                            size > 4))
1823                                 size -= 4;
1824
1825                         buffer_info->length = size;
1826                         buffer_info->dma =
1827                                 pci_map_page(adapter->pdev,
1828                                         frag->page,
1829                                         offset,
1830                                         size,
1831                                         PCI_DMA_TODEVICE);
1832                         buffer_info->time_stamp = jiffies;
1833
1834                         len -= size;
1835                         offset += size;
1836                         count++;
1837                         if(unlikely(++i == tx_ring->count)) i = 0;
1838                 }
1839         }
1840
1841         i = (i == 0) ? tx_ring->count - 1 : i - 1;
1842         tx_ring->buffer_info[i].skb = skb;
1843         tx_ring->buffer_info[first].next_to_watch = i;
1844
1845         return count;
1846 }
1847
1848 static inline void
1849 e1000_tx_queue(struct e1000_adapter *adapter, int count, int tx_flags)
1850 {
1851         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1852         struct e1000_tx_desc *tx_desc = NULL;
1853         struct e1000_buffer *buffer_info;
1854         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
1855         unsigned int i;
1856
1857         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
1858                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
1859                              E1000_TXD_CMD_TSE;
1860                 txd_upper |= (E1000_TXD_POPTS_IXSM | E1000_TXD_POPTS_TXSM) << 8;
1861         }
1862
1863         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
1864                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
1865                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
1866         }
1867
1868         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
1869                 txd_lower |= E1000_TXD_CMD_VLE;
1870                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
1871         }
1872
1873         i = tx_ring->next_to_use;
1874
1875         while(count--) {
1876                 buffer_info = &tx_ring->buffer_info[i];
1877                 tx_desc = E1000_TX_DESC(*tx_ring, i);
1878                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1879                 tx_desc->lower.data =
1880                         cpu_to_le32(txd_lower | buffer_info->length);
1881                 tx_desc->upper.data = cpu_to_le32(txd_upper);
1882                 if(unlikely(++i == tx_ring->count)) i = 0;
1883         }
1884
1885         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
1886
1887         /* Force memory writes to complete before letting h/w
1888          * know there are new descriptors to fetch.  (Only
1889          * applicable for weak-ordered memory model archs,
1890          * such as IA-64). */
1891         wmb();
1892
1893         tx_ring->next_to_use = i;
1894         E1000_WRITE_REG(&adapter->hw, TDT, i);
1895 }
1896
1897 /**
1898  * 82547 workaround to avoid controller hang in half-duplex environment.
1899  * The workaround is to avoid queuing a large packet that would span
1900  * the internal Tx FIFO ring boundary by notifying the stack to resend
1901  * the packet at a later time.  This gives the Tx FIFO an opportunity to
1902  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
1903  * to the beginning of the Tx FIFO.
1904  **/
1905
1906 #define E1000_FIFO_HDR                  0x10
1907 #define E1000_82547_PAD_LEN             0x3E0
1908
1909 static inline int
1910 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
1911 {
1912         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
1913         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
1914
1915         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
1916
1917         if(adapter->link_duplex != HALF_DUPLEX)
1918                 goto no_fifo_stall_required;
1919
1920         if(atomic_read(&adapter->tx_fifo_stall))
1921                 return 1;
1922
1923         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
1924                 atomic_set(&adapter->tx_fifo_stall, 1);
1925                 return 1;
1926         }
1927
1928 no_fifo_stall_required:
1929         adapter->tx_fifo_head += skb_fifo_len;
1930         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
1931                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
1932         return 0;
1933 }
1934
1935 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
1936 static int
1937 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1938 {
1939         struct e1000_adapter *adapter = netdev->priv;
1940         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
1941         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
1942         unsigned int tx_flags = 0;
1943         unsigned int len = skb->len;
1944         unsigned long flags;
1945         unsigned int nr_frags = 0;
1946         unsigned int mss = 0;
1947         int count = 0;
1948         int tso;
1949         unsigned int f;
1950         len -= skb->data_len;
1951
1952         if(unlikely(skb->len <= 0)) {
1953                 dev_kfree_skb_any(skb);
1954                 return NETDEV_TX_OK;
1955         }
1956
1957 #ifdef NETIF_F_TSO
1958         mss = skb_shinfo(skb)->tso_size;
1959         /* The controller does a simple calculation to
1960          * make sure there is enough room in the FIFO before
1961          * initiating the DMA for each buffer.  The calc is:
1962          * 4 = ceil(buffer len/mss).  To make sure we don't
1963          * overrun the FIFO, adjust the max buffer len if mss
1964          * drops. */
1965         if(mss) {
1966                 max_per_txd = min(mss << 2, max_per_txd);
1967                 max_txd_pwr = fls(max_per_txd) - 1;
1968         }
1969
1970         if((mss) || (skb->ip_summed == CHECKSUM_HW))
1971                 count++;
1972         count++;        /* for sentinel desc */
1973 #else
1974         if(skb->ip_summed == CHECKSUM_HW)
1975                 count++;
1976 #endif
1977         count += TXD_USE_COUNT(len, max_txd_pwr);
1978
1979         if(adapter->pcix_82544)
1980                 count++;
1981
1982         nr_frags = skb_shinfo(skb)->nr_frags;
1983         for(f = 0; f < nr_frags; f++)
1984                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
1985                                        max_txd_pwr);
1986         if(adapter->pcix_82544)
1987                 count += nr_frags;
1988
1989         local_irq_save(flags);
1990         if (!spin_trylock(&adapter->tx_lock)) {
1991                 /* Collision - tell upper layer to requeue */
1992                 local_irq_restore(flags);
1993                 return NETDEV_TX_LOCKED;
1994         }
1995
1996         /* need: count + 2 desc gap to keep tail from touching
1997          * head, otherwise try next time */
1998         if(unlikely(E1000_DESC_UNUSED(&adapter->tx_ring) < count + 2)) {
1999                 netif_stop_queue(netdev);
2000                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2001                 return NETDEV_TX_BUSY;
2002         }
2003
2004         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2005                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2006                         netif_stop_queue(netdev);
2007                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2008                         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2009                         return NETDEV_TX_BUSY;
2010                 }
2011         }
2012
2013         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2014                 tx_flags |= E1000_TX_FLAGS_VLAN;
2015                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2016         }
2017
2018         first = adapter->tx_ring.next_to_use;
2019
2020         tso = e1000_tso(adapter, skb);
2021         if (tso < 0) {
2022                 dev_kfree_skb_any(skb);
2023                 return NETDEV_TX_OK;
2024         }
2025
2026         if (likely(tso))
2027                 tx_flags |= E1000_TX_FLAGS_TSO;
2028         else if(likely(e1000_tx_csum(adapter, skb)))
2029                 tx_flags |= E1000_TX_FLAGS_CSUM;
2030
2031         e1000_tx_queue(adapter,
2032                 e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss),
2033                 tx_flags);
2034
2035         netdev->trans_start = jiffies;
2036
2037         /* Make sure there is space in the ring for the next send. */
2038         if(unlikely(E1000_DESC_UNUSED(&adapter->tx_ring) < MAX_SKB_FRAGS + 2))
2039                 netif_stop_queue(netdev);
2040
2041         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2042         return NETDEV_TX_OK;
2043 }
2044
2045 /**
2046  * e1000_tx_timeout - Respond to a Tx Hang
2047  * @netdev: network interface device structure
2048  **/
2049
2050 static void
2051 e1000_tx_timeout(struct net_device *netdev)
2052 {
2053         struct e1000_adapter *adapter = netdev->priv;
2054
2055         /* Do the reset outside of interrupt context */
2056         schedule_work(&adapter->tx_timeout_task);
2057 }
2058
2059 static void
2060 e1000_tx_timeout_task(struct net_device *netdev)
2061 {
2062         struct e1000_adapter *adapter = netdev->priv;
2063
2064         e1000_down(adapter);
2065         e1000_up(adapter);
2066 }
2067
2068 /**
2069  * e1000_get_stats - Get System Network Statistics
2070  * @netdev: network interface device structure
2071  *
2072  * Returns the address of the device statistics structure.
2073  * The statistics are actually updated from the timer callback.
2074  **/
2075
2076 static struct net_device_stats *
2077 e1000_get_stats(struct net_device *netdev)
2078 {
2079         struct e1000_adapter *adapter = netdev->priv;
2080
2081         e1000_update_stats(adapter);
2082         return &adapter->net_stats;
2083 }
2084
2085 /**
2086  * e1000_change_mtu - Change the Maximum Transfer Unit
2087  * @netdev: network interface device structure
2088  * @new_mtu: new value for maximum frame size
2089  *
2090  * Returns 0 on success, negative on failure
2091  **/
2092
2093 static int
2094 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2095 {
2096         struct e1000_adapter *adapter = netdev->priv;
2097         int old_mtu = adapter->rx_buffer_len;
2098         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2099
2100         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2101                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2102                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2103                         return -EINVAL;
2104         }
2105
2106         if(max_frame <= MAXIMUM_ETHERNET_FRAME_SIZE) {
2107                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2108
2109         } else if(adapter->hw.mac_type < e1000_82543) {
2110                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported on 82542\n");
2111                 return -EINVAL;
2112
2113         } else if(max_frame <= E1000_RXBUFFER_4096) {
2114                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2115
2116         } else if(max_frame <= E1000_RXBUFFER_8192) {
2117                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2118
2119         } else {
2120                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2121         }
2122
2123         if(old_mtu != adapter->rx_buffer_len && netif_running(netdev)) {
2124                 e1000_down(adapter);
2125                 e1000_up(adapter);
2126         }
2127
2128         netdev->mtu = new_mtu;
2129         adapter->hw.max_frame_size = max_frame;
2130
2131         return 0;
2132 }
2133
2134 /**
2135  * e1000_update_stats - Update the board statistics counters
2136  * @adapter: board private structure
2137  **/
2138
2139 void
2140 e1000_update_stats(struct e1000_adapter *adapter)
2141 {
2142         struct e1000_hw *hw = &adapter->hw;
2143         unsigned long flags;
2144         uint16_t phy_tmp;
2145
2146 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2147
2148         spin_lock_irqsave(&adapter->stats_lock, flags);
2149
2150         /* these counters are modified from e1000_adjust_tbi_stats,
2151          * called from the interrupt context, so they must only
2152          * be written while holding adapter->stats_lock
2153          */
2154
2155         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2156         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2157         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2158         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2159         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2160         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2161         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2162         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2163         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2164         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2165         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2166         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2167         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2168
2169         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2170         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2171         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2172         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2173         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2174         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2175         adapter->stats.dc += E1000_READ_REG(hw, DC);
2176         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2177         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2178         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2179         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2180         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2181         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2182         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2183         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2184         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2185         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2186         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2187         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2188         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2189         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2190         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2191         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2192         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2193         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2194         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2195         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2196         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2197         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2198         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2199         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2200         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2201         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2202         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2203
2204         /* used for adaptive IFS */
2205
2206         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
2207         adapter->stats.tpt += hw->tx_packet_delta;
2208         hw->collision_delta = E1000_READ_REG(hw, COLC);
2209         adapter->stats.colc += hw->collision_delta;
2210
2211         if(hw->mac_type >= e1000_82543) {
2212                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
2213                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
2214                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
2215                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
2216                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
2217                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
2218         }
2219
2220         /* Fill out the OS statistics structure */
2221
2222         adapter->net_stats.rx_packets = adapter->stats.gprc;
2223         adapter->net_stats.tx_packets = adapter->stats.gptc;
2224         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
2225         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
2226         adapter->net_stats.multicast = adapter->stats.mprc;
2227         adapter->net_stats.collisions = adapter->stats.colc;
2228
2229         /* Rx Errors */
2230
2231         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
2232                 adapter->stats.crcerrs + adapter->stats.algnerrc +
2233                 adapter->stats.rlec + adapter->stats.rnbc +
2234                 adapter->stats.mpc + adapter->stats.cexterr;
2235         adapter->net_stats.rx_dropped = adapter->stats.rnbc;
2236         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2237         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2238         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
2239         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
2240         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
2241
2242         /* Tx Errors */
2243
2244         adapter->net_stats.tx_errors = adapter->stats.ecol +
2245                                        adapter->stats.latecol;
2246         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
2247         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
2248         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
2249
2250         /* Tx Dropped needs to be maintained elsewhere */
2251
2252         /* Phy Stats */
2253
2254         if(hw->media_type == e1000_media_type_copper) {
2255                 if((adapter->link_speed == SPEED_1000) &&
2256                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
2257                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
2258                         adapter->phy_stats.idle_errors += phy_tmp;
2259                 }
2260
2261                 if((hw->mac_type <= e1000_82546) &&
2262                    (hw->phy_type == e1000_phy_m88) &&
2263                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
2264                         adapter->phy_stats.receive_errors += phy_tmp;
2265         }
2266
2267         spin_unlock_irqrestore(&adapter->stats_lock, flags);
2268 }
2269
2270 /**
2271  * e1000_intr - Interrupt Handler
2272  * @irq: interrupt number
2273  * @data: pointer to a network interface device structure
2274  * @pt_regs: CPU registers structure
2275  **/
2276
2277 static irqreturn_t
2278 e1000_intr(int irq, void *data, struct pt_regs *regs)
2279 {
2280         struct net_device *netdev = data;
2281         struct e1000_adapter *adapter = netdev->priv;
2282         struct e1000_hw *hw = &adapter->hw;
2283         uint32_t icr = E1000_READ_REG(hw, ICR);
2284 #ifndef CONFIG_E1000_NAPI
2285         unsigned int i;
2286 #endif
2287
2288         if(unlikely(!icr))
2289                 return IRQ_NONE;  /* Not our interrupt */
2290
2291         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
2292                 hw->get_link_status = 1;
2293                 mod_timer(&adapter->watchdog_timer, jiffies);
2294         }
2295
2296 #ifdef CONFIG_E1000_NAPI
2297         if(likely(netif_rx_schedule_prep(netdev))) {
2298
2299                 /* Disable interrupts and register for poll. The flush
2300                   of the posted write is intentionally left out.
2301                 */
2302
2303                 atomic_inc(&adapter->irq_sem);
2304                 E1000_WRITE_REG(hw, IMC, ~0);
2305                 __netif_rx_schedule(netdev);
2306         }
2307 #else
2308         /* Writing IMC and IMS is needed for 82547.
2309            Due to Hub Link bus being occupied, an interrupt
2310            de-assertion message is not able to be sent.
2311            When an interrupt assertion message is generated later,
2312            two messages are re-ordered and sent out.
2313            That causes APIC to think 82547 is in de-assertion
2314            state, while 82547 is in assertion state, resulting
2315            in dead lock. Writing IMC forces 82547 into
2316            de-assertion state.
2317         */
2318         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
2319                 atomic_inc(&adapter->irq_sem);
2320                 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
2321         }
2322
2323         for(i = 0; i < E1000_MAX_INTR; i++)
2324                 if(unlikely(!e1000_clean_rx_irq(adapter) &
2325                    !e1000_clean_tx_irq(adapter)))
2326                         break;
2327
2328         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
2329                 e1000_irq_enable(adapter);
2330 #endif
2331
2332         return IRQ_HANDLED;
2333 }
2334
2335 #ifdef CONFIG_E1000_NAPI
2336 /**
2337  * e1000_clean - NAPI Rx polling callback
2338  * @adapter: board private structure
2339  **/
2340
2341 static int
2342 e1000_clean(struct net_device *netdev, int *budget)
2343 {
2344         struct e1000_adapter *adapter = netdev->priv;
2345         int work_to_do = min(*budget, netdev->quota);
2346         int tx_cleaned;
2347         int work_done = 0;
2348
2349         tx_cleaned = e1000_clean_tx_irq(adapter);
2350         e1000_clean_rx_irq(adapter, &work_done, work_to_do);
2351
2352         *budget -= work_done;
2353         netdev->quota -= work_done;
2354
2355         /* if no Tx and not enough Rx work done, exit the polling mode */
2356         if((!tx_cleaned && (work_done < work_to_do)) ||
2357                                 !netif_running(netdev)) {
2358                 netif_rx_complete(netdev);
2359                 e1000_irq_enable(adapter);
2360                 return 0;
2361         }
2362
2363         return 1;
2364 }
2365
2366 #endif
2367 /**
2368  * e1000_clean_tx_irq - Reclaim resources after transmit completes
2369  * @adapter: board private structure
2370  **/
2371
2372 static boolean_t
2373 e1000_clean_tx_irq(struct e1000_adapter *adapter)
2374 {
2375         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
2376         struct net_device *netdev = adapter->netdev;
2377         struct e1000_tx_desc *tx_desc, *eop_desc;
2378         struct e1000_buffer *buffer_info;
2379         unsigned int i, eop;
2380         boolean_t cleaned = FALSE;
2381
2382         i = tx_ring->next_to_clean;
2383         eop = tx_ring->buffer_info[i].next_to_watch;
2384         eop_desc = E1000_TX_DESC(*tx_ring, eop);
2385
2386         while(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
2387                 /* pre-mature writeback of Tx descriptors     */
2388                 /* clear (free buffers and unmap pci_mapping) */
2389                 /* previous_buffer_info                       */
2390                 if (likely(adapter->previous_buffer_info.skb != NULL)) {
2391                         e1000_unmap_and_free_tx_resource(adapter,
2392                                         &adapter->previous_buffer_info);
2393                 }
2394
2395                 for(cleaned = FALSE; !cleaned; ) {
2396                         tx_desc = E1000_TX_DESC(*tx_ring, i);
2397                         buffer_info = &tx_ring->buffer_info[i];
2398                         cleaned = (i == eop);
2399
2400                         /* pre-mature writeback of Tx descriptors */
2401                         /* save the cleaning of the this for the  */
2402                         /* next iteration                         */
2403                         if (cleaned) {
2404                                 memcpy(&adapter->previous_buffer_info,
2405                                         buffer_info,
2406                                         sizeof(struct e1000_buffer));
2407                                 memset(buffer_info,
2408                                         0,
2409                                         sizeof(struct e1000_buffer));
2410                         } else {
2411                                 e1000_unmap_and_free_tx_resource(adapter,
2412                                                         buffer_info);
2413                         }
2414
2415                         tx_desc->buffer_addr = 0;
2416                         tx_desc->lower.data = 0;
2417                         tx_desc->upper.data = 0;
2418
2419                         cleaned = (i == eop);
2420                         if(unlikely(++i == tx_ring->count)) i = 0;
2421                 }
2422
2423                 eop = tx_ring->buffer_info[i].next_to_watch;
2424                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
2425         }
2426
2427         tx_ring->next_to_clean = i;
2428
2429         spin_lock(&adapter->tx_lock);
2430
2431         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
2432                     netif_carrier_ok(netdev)))
2433                 netif_wake_queue(netdev);
2434
2435         spin_unlock(&adapter->tx_lock);
2436
2437         if(adapter->detect_tx_hung) {
2438                 /* detect a transmit hang in hardware, this serializes the
2439                  * check with the clearing of time_stamp and movement of i */
2440                 adapter->detect_tx_hung = FALSE;
2441                 if(tx_ring->buffer_info[i].dma &&
2442                    time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ) &&
2443                    !(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_TXOFF))
2444                         netif_stop_queue(netdev);
2445         }
2446
2447         return cleaned;
2448 }
2449
2450 /**
2451  * e1000_rx_checksum - Receive Checksum Offload for 82543
2452  * @adapter: board private structure
2453  * @rx_desc: receive descriptor
2454  * @sk_buff: socket buffer with received data
2455  **/
2456
2457 static inline void
2458 e1000_rx_checksum(struct e1000_adapter *adapter,
2459                   struct e1000_rx_desc *rx_desc,
2460                   struct sk_buff *skb)
2461 {
2462         /* 82543 or newer only */
2463         if(unlikely((adapter->hw.mac_type < e1000_82543) ||
2464         /* Ignore Checksum bit is set */
2465         (rx_desc->status & E1000_RXD_STAT_IXSM) ||
2466         /* TCP Checksum has not been calculated */
2467         (!(rx_desc->status & E1000_RXD_STAT_TCPCS)))) {
2468                 skb->ip_summed = CHECKSUM_NONE;
2469                 return;
2470         }
2471
2472         /* At this point we know the hardware did the TCP checksum */
2473         /* now look at the TCP checksum error bit */
2474         if(rx_desc->errors & E1000_RXD_ERR_TCPE) {
2475                 /* let the stack verify checksum errors */
2476                 skb->ip_summed = CHECKSUM_NONE;
2477                 adapter->hw_csum_err++;
2478         } else {
2479                 /* TCP checksum is good */
2480                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2481                 adapter->hw_csum_good++;
2482         }
2483 }
2484
2485 /**
2486  * e1000_clean_rx_irq - Send received data up the network stack
2487  * @adapter: board private structure
2488  **/
2489
2490 static boolean_t
2491 #ifdef CONFIG_E1000_NAPI
2492 e1000_clean_rx_irq(struct e1000_adapter *adapter, int *work_done,
2493                    int work_to_do)
2494 #else
2495 e1000_clean_rx_irq(struct e1000_adapter *adapter)
2496 #endif
2497 {
2498         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2499         struct net_device *netdev = adapter->netdev;
2500         struct pci_dev *pdev = adapter->pdev;
2501         struct e1000_rx_desc *rx_desc;
2502         struct e1000_buffer *buffer_info;
2503         struct sk_buff *skb;
2504         unsigned long flags;
2505         uint32_t length;
2506         uint8_t last_byte;
2507         unsigned int i;
2508         boolean_t cleaned = FALSE;
2509
2510         i = rx_ring->next_to_clean;
2511         rx_desc = E1000_RX_DESC(*rx_ring, i);
2512
2513         while(rx_desc->status & E1000_RXD_STAT_DD) {
2514                 buffer_info = &rx_ring->buffer_info[i];
2515 #ifdef CONFIG_E1000_NAPI
2516                 if(*work_done >= work_to_do)
2517                         break;
2518                 (*work_done)++;
2519 #endif
2520                 cleaned = TRUE;
2521
2522                 pci_unmap_single(pdev,
2523                                  buffer_info->dma,
2524                                  buffer_info->length,
2525                                  PCI_DMA_FROMDEVICE);
2526
2527                 skb = buffer_info->skb;
2528                 length = le16_to_cpu(rx_desc->length);
2529
2530                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
2531                         /* All receives must fit into a single buffer */
2532                         E1000_DBG("%s: Receive packet consumed multiple"
2533                                         " buffers\n", netdev->name);
2534                         dev_kfree_skb_irq(skb);
2535                         goto next_desc;
2536                 }
2537
2538                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
2539                         last_byte = *(skb->data + length - 1);
2540                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
2541                                       rx_desc->errors, length, last_byte)) {
2542                                 spin_lock_irqsave(&adapter->stats_lock, flags);
2543                                 e1000_tbi_adjust_stats(&adapter->hw,
2544                                                        &adapter->stats,
2545                                                        length, skb->data);
2546                                 spin_unlock_irqrestore(&adapter->stats_lock,
2547                                                        flags);
2548                                 length--;
2549                         } else {
2550                                 dev_kfree_skb_irq(skb);
2551                                 goto next_desc;
2552                         }
2553                 }
2554
2555                 /* Good Receive */
2556                 skb_put(skb, length - ETHERNET_FCS_SIZE);
2557
2558                 /* Receive Checksum Offload */
2559                 e1000_rx_checksum(adapter, rx_desc, skb);
2560
2561                 skb->protocol = eth_type_trans(skb, netdev);
2562 #ifdef CONFIG_E1000_NAPI
2563                 if(unlikely(adapter->vlgrp &&
2564                             (rx_desc->status & E1000_RXD_STAT_VP))) {
2565                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2566                                         le16_to_cpu(rx_desc->special) &
2567                                         E1000_RXD_SPC_VLAN_MASK);
2568                 } else {
2569                         netif_receive_skb(skb);
2570                 }
2571 #else /* CONFIG_E1000_NAPI */
2572                 if(unlikely(adapter->vlgrp &&
2573                             (rx_desc->status & E1000_RXD_STAT_VP))) {
2574                         vlan_hwaccel_rx(skb, adapter->vlgrp,
2575                                         le16_to_cpu(rx_desc->special) &
2576                                         E1000_RXD_SPC_VLAN_MASK);
2577                 } else {
2578                         netif_rx(skb);
2579                 }
2580 #endif /* CONFIG_E1000_NAPI */
2581                 netdev->last_rx = jiffies;
2582
2583 next_desc:
2584                 rx_desc->status = 0;
2585                 buffer_info->skb = NULL;
2586                 if(unlikely(++i == rx_ring->count)) i = 0;
2587
2588                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2589         }
2590
2591         rx_ring->next_to_clean = i;
2592
2593         e1000_alloc_rx_buffers(adapter);
2594
2595         return cleaned;
2596 }
2597
2598 /**
2599  * e1000_alloc_rx_buffers - Replace used receive buffers
2600  * @adapter: address of board private structure
2601  **/
2602
2603 static void
2604 e1000_alloc_rx_buffers(struct e1000_adapter *adapter)
2605 {
2606         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2607         struct net_device *netdev = adapter->netdev;
2608         struct pci_dev *pdev = adapter->pdev;
2609         struct e1000_rx_desc *rx_desc;
2610         struct e1000_buffer *buffer_info;
2611         struct sk_buff *skb;
2612         unsigned int i, bufsz;
2613
2614         i = rx_ring->next_to_use;
2615         buffer_info = &rx_ring->buffer_info[i];
2616
2617         while(!buffer_info->skb) {
2618                 bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
2619
2620                 skb = dev_alloc_skb(bufsz);
2621                 if(unlikely(!skb)) {
2622                         /* Better luck next round */
2623                         break;
2624                 }
2625
2626                 /* fix for errata 23, cant cross 64kB boundary */
2627                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
2628                         struct sk_buff *oldskb = skb;
2629                         DPRINTK(RX_ERR,ERR,
2630                                 "skb align check failed: %u bytes at %p\n",
2631                                 bufsz, skb->data);
2632                         /* try again, without freeing the previous */
2633                         skb = dev_alloc_skb(bufsz);
2634                         if (!skb) {
2635                                 dev_kfree_skb(oldskb);
2636                                 break;
2637                         }
2638                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
2639                                 /* give up */
2640                                 dev_kfree_skb(skb);
2641                                 dev_kfree_skb(oldskb);
2642                                 break; /* while !buffer_info->skb */
2643                         } else {
2644                                 /* move on with the new one */
2645                                 dev_kfree_skb(oldskb);
2646                         }
2647                 }
2648
2649                 /* Make buffer alignment 2 beyond a 16 byte boundary
2650                  * this will result in a 16 byte aligned IP header after
2651                  * the 14 byte MAC header is removed
2652                  */
2653                 skb_reserve(skb, NET_IP_ALIGN);
2654
2655                 skb->dev = netdev;
2656
2657                 buffer_info->skb = skb;
2658                 buffer_info->length = adapter->rx_buffer_len;
2659                 buffer_info->dma = pci_map_single(pdev,
2660                                                   skb->data,
2661                                                   adapter->rx_buffer_len,
2662                                                   PCI_DMA_FROMDEVICE);
2663
2664                 /* fix for errata 23, cant cross 64kB boundary */
2665                 if(!e1000_check_64k_bound(adapter,
2666                                                (void *)(unsigned long)buffer_info->dma,
2667                                                adapter->rx_buffer_len)) {
2668                         DPRINTK(RX_ERR,ERR,
2669                                 "dma align check failed: %u bytes at %ld\n",
2670                                 adapter->rx_buffer_len, (unsigned long)buffer_info->dma);
2671
2672                         dev_kfree_skb(skb);
2673                         buffer_info->skb = NULL;
2674
2675                         pci_unmap_single(pdev,
2676                                          buffer_info->dma,
2677                                          adapter->rx_buffer_len,
2678                                          PCI_DMA_FROMDEVICE);
2679
2680                         break; /* while !buffer_info->skb */
2681                 }
2682
2683                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2684                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2685
2686                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
2687                         /* Force memory writes to complete before letting h/w
2688                          * know there are new descriptors to fetch.  (Only
2689                          * applicable for weak-ordered memory model archs,
2690                          * such as IA-64). */
2691                         wmb();
2692
2693                         E1000_WRITE_REG(&adapter->hw, RDT, i);
2694                 }
2695
2696                 if(unlikely(++i == rx_ring->count)) i = 0;
2697                 buffer_info = &rx_ring->buffer_info[i];
2698         }
2699
2700         rx_ring->next_to_use = i;
2701 }
2702
2703 /**
2704  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
2705  * @adapter:
2706  **/
2707
2708 static void
2709 e1000_smartspeed(struct e1000_adapter *adapter)
2710 {
2711         uint16_t phy_status;
2712         uint16_t phy_ctrl;
2713
2714         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
2715            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
2716                 return;
2717
2718         if(adapter->smartspeed == 0) {
2719                 /* If Master/Slave config fault is asserted twice,
2720                  * we assume back-to-back */
2721                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
2722                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
2723                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
2724                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
2725                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
2726                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
2727                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
2728                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
2729                                             phy_ctrl);
2730                         adapter->smartspeed++;
2731                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
2732                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
2733                                                &phy_ctrl)) {
2734                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
2735                                              MII_CR_RESTART_AUTO_NEG);
2736                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
2737                                                     phy_ctrl);
2738                         }
2739                 }
2740                 return;
2741         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
2742                 /* If still no link, perhaps using 2/3 pair cable */
2743                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
2744                 phy_ctrl |= CR_1000T_MS_ENABLE;
2745                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
2746                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
2747                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
2748                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
2749                                      MII_CR_RESTART_AUTO_NEG);
2750                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
2751                 }
2752         }
2753         /* Restart process after E1000_SMARTSPEED_MAX iterations */
2754         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
2755                 adapter->smartspeed = 0;
2756 }
2757
2758 /**
2759  * e1000_ioctl -
2760  * @netdev:
2761  * @ifreq:
2762  * @cmd:
2763  **/
2764
2765 static int
2766 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2767 {
2768         switch (cmd) {
2769         case SIOCGMIIPHY:
2770         case SIOCGMIIREG:
2771         case SIOCSMIIREG:
2772                 return e1000_mii_ioctl(netdev, ifr, cmd);
2773         default:
2774                 return -EOPNOTSUPP;
2775         }
2776 }
2777
2778 /**
2779  * e1000_mii_ioctl -
2780  * @netdev:
2781  * @ifreq:
2782  * @cmd:
2783  **/
2784
2785 static int
2786 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2787 {
2788         struct e1000_adapter *adapter = netdev->priv;
2789         struct mii_ioctl_data *data = if_mii(ifr);
2790         int retval;
2791         uint16_t mii_reg;
2792         uint16_t spddplx;
2793
2794         if(adapter->hw.media_type != e1000_media_type_copper)
2795                 return -EOPNOTSUPP;
2796
2797         switch (cmd) {
2798         case SIOCGMIIPHY:
2799                 data->phy_id = adapter->hw.phy_addr;
2800                 break;
2801         case SIOCGMIIREG:
2802                 if (!capable(CAP_NET_ADMIN))
2803                         return -EPERM;
2804                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
2805                                    &data->val_out))
2806                         return -EIO;
2807                 break;
2808         case SIOCSMIIREG:
2809                 if (!capable(CAP_NET_ADMIN))
2810                         return -EPERM;
2811                 if (data->reg_num & ~(0x1F))
2812                         return -EFAULT;
2813                 mii_reg = data->val_in;
2814                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
2815                                         mii_reg))
2816                         return -EIO;
2817                 if (adapter->hw.phy_type == e1000_phy_m88) {
2818                         switch (data->reg_num) {
2819                         case PHY_CTRL:
2820                                 if(mii_reg & MII_CR_POWER_DOWN)
2821                                         break;
2822                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
2823                                         adapter->hw.autoneg = 1;
2824                                         adapter->hw.autoneg_advertised = 0x2F;
2825                                 } else {
2826                                         if (mii_reg & 0x40)
2827                                                 spddplx = SPEED_1000;
2828                                         else if (mii_reg & 0x2000)
2829                                                 spddplx = SPEED_100;
2830                                         else
2831                                                 spddplx = SPEED_10;
2832                                         spddplx += (mii_reg & 0x100)
2833                                                    ? FULL_DUPLEX :
2834                                                    HALF_DUPLEX;
2835                                         retval = e1000_set_spd_dplx(adapter,
2836                                                                     spddplx);
2837                                         if(retval)
2838                                                 return retval;
2839                                 }
2840                                 if(netif_running(adapter->netdev)) {
2841                                         e1000_down(adapter);
2842                                         e1000_up(adapter);
2843                                 } else
2844                                         e1000_reset(adapter);
2845                                 break;
2846                         case M88E1000_PHY_SPEC_CTRL:
2847                         case M88E1000_EXT_PHY_SPEC_CTRL:
2848                                 if (e1000_phy_reset(&adapter->hw))
2849                                         return -EIO;
2850                                 break;
2851                         }
2852                 } else {
2853                         switch (data->reg_num) {
2854                         case PHY_CTRL:
2855                                 if(mii_reg & MII_CR_POWER_DOWN)
2856                                         break;
2857                                 if(netif_running(adapter->netdev)) {
2858                                         e1000_down(adapter);
2859                                         e1000_up(adapter);
2860                                 } else
2861                                         e1000_reset(adapter);
2862                                 break;
2863                         }
2864                 }
2865                 break;
2866         default:
2867                 return -EOPNOTSUPP;
2868         }
2869         return E1000_SUCCESS;
2870 }
2871
2872 void
2873 e1000_pci_set_mwi(struct e1000_hw *hw)
2874 {
2875         struct e1000_adapter *adapter = hw->back;
2876
2877         int ret;
2878         ret = pci_set_mwi(adapter->pdev);
2879 }
2880
2881 void
2882 e1000_pci_clear_mwi(struct e1000_hw *hw)
2883 {
2884         struct e1000_adapter *adapter = hw->back;
2885
2886         pci_clear_mwi(adapter->pdev);
2887 }
2888
2889 void
2890 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
2891 {
2892         struct e1000_adapter *adapter = hw->back;
2893
2894         pci_read_config_word(adapter->pdev, reg, value);
2895 }
2896
2897 void
2898 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
2899 {
2900         struct e1000_adapter *adapter = hw->back;
2901
2902         pci_write_config_word(adapter->pdev, reg, *value);
2903 }
2904
2905 uint32_t
2906 e1000_io_read(struct e1000_hw *hw, unsigned long port)
2907 {
2908         return inl(port);
2909 }
2910
2911 void
2912 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
2913 {
2914         outl(value, port);
2915 }
2916
2917 static void
2918 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2919 {
2920         struct e1000_adapter *adapter = netdev->priv;
2921         uint32_t ctrl, rctl;
2922
2923         e1000_irq_disable(adapter);
2924         adapter->vlgrp = grp;
2925
2926         if(grp) {
2927                 /* enable VLAN tag insert/strip */
2928                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2929                 ctrl |= E1000_CTRL_VME;
2930                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
2931
2932                 /* enable VLAN receive filtering */
2933                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2934                 rctl |= E1000_RCTL_VFE;
2935                 rctl &= ~E1000_RCTL_CFIEN;
2936                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2937         } else {
2938                 /* disable VLAN tag insert/strip */
2939                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2940                 ctrl &= ~E1000_CTRL_VME;
2941                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
2942
2943                 /* disable VLAN filtering */
2944                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2945                 rctl &= ~E1000_RCTL_VFE;
2946                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2947         }
2948
2949         e1000_irq_enable(adapter);
2950 }
2951
2952 static void
2953 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
2954 {
2955         struct e1000_adapter *adapter = netdev->priv;
2956         uint32_t vfta, index;
2957
2958         /* add VID to filter table */
2959         index = (vid >> 5) & 0x7F;
2960         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2961         vfta |= (1 << (vid & 0x1F));
2962         e1000_write_vfta(&adapter->hw, index, vfta);
2963 }
2964
2965 static void
2966 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
2967 {
2968         struct e1000_adapter *adapter = netdev->priv;
2969         uint32_t vfta, index;
2970
2971         e1000_irq_disable(adapter);
2972
2973         if(adapter->vlgrp)
2974                 adapter->vlgrp->vlan_devices[vid] = NULL;
2975
2976         e1000_irq_enable(adapter);
2977
2978         /* remove VID from filter table */
2979         index = (vid >> 5) & 0x7F;
2980         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
2981         vfta &= ~(1 << (vid & 0x1F));
2982         e1000_write_vfta(&adapter->hw, index, vfta);
2983 }
2984
2985 static void
2986 e1000_restore_vlan(struct e1000_adapter *adapter)
2987 {
2988         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2989
2990         if(adapter->vlgrp) {
2991                 uint16_t vid;
2992                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2993                         if(!adapter->vlgrp->vlan_devices[vid])
2994                                 continue;
2995                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
2996                 }
2997         }
2998 }
2999
3000 int
3001 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
3002 {
3003         adapter->hw.autoneg = 0;
3004
3005         switch(spddplx) {
3006         case SPEED_10 + DUPLEX_HALF:
3007                 adapter->hw.forced_speed_duplex = e1000_10_half;
3008                 break;
3009         case SPEED_10 + DUPLEX_FULL:
3010                 adapter->hw.forced_speed_duplex = e1000_10_full;
3011                 break;
3012         case SPEED_100 + DUPLEX_HALF:
3013                 adapter->hw.forced_speed_duplex = e1000_100_half;
3014                 break;
3015         case SPEED_100 + DUPLEX_FULL:
3016                 adapter->hw.forced_speed_duplex = e1000_100_full;
3017                 break;
3018         case SPEED_1000 + DUPLEX_FULL:
3019                 adapter->hw.autoneg = 1;
3020                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
3021                 break;
3022         case SPEED_1000 + DUPLEX_HALF: /* not supported */
3023         default:
3024                 DPRINTK(PROBE, ERR,
3025                         "Unsupported Speed/Duplexity configuration\n");
3026                 return -EINVAL;
3027         }
3028         return 0;
3029 }
3030
3031 static int
3032 e1000_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
3033 {
3034         struct pci_dev *pdev = NULL;
3035
3036         switch(event) {
3037         case SYS_DOWN:
3038         case SYS_HALT:
3039         case SYS_POWER_OFF:
3040                 while((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
3041                         if(pci_dev_driver(pdev) == &e1000_driver)
3042                                 e1000_suspend(pdev, 3);
3043                 }
3044         }
3045         return NOTIFY_DONE;
3046 }
3047
3048 static int
3049 e1000_suspend(struct pci_dev *pdev, uint32_t state)
3050 {
3051         struct net_device *netdev = pci_get_drvdata(pdev);
3052         struct e1000_adapter *adapter = netdev->priv;
3053         uint32_t ctrl, ctrl_ext, rctl, manc, status;
3054         uint32_t wufc = adapter->wol;
3055
3056         netif_device_detach(netdev);
3057
3058         if(netif_running(netdev))
3059                 e1000_down(adapter);
3060
3061         status = E1000_READ_REG(&adapter->hw, STATUS);
3062         if(status & E1000_STATUS_LU)
3063                 wufc &= ~E1000_WUFC_LNKC;
3064
3065         if(wufc) {
3066                 e1000_setup_rctl(adapter);
3067                 e1000_set_multi(netdev);
3068
3069                 /* turn on all-multi mode if wake on multicast is enabled */
3070                 if(adapter->wol & E1000_WUFC_MC) {
3071                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
3072                         rctl |= E1000_RCTL_MPE;
3073                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
3074                 }
3075
3076                 if(adapter->hw.mac_type >= e1000_82540) {
3077                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3078                         /* advertise wake from D3Cold */
3079                         #define E1000_CTRL_ADVD3WUC 0x00100000
3080                         /* phy power management enable */
3081                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
3082                         ctrl |= E1000_CTRL_ADVD3WUC |
3083                                 E1000_CTRL_EN_PHY_PWR_MGMT;
3084                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3085                 }
3086
3087                 if(adapter->hw.media_type == e1000_media_type_fiber ||
3088                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
3089                         /* keep the laser running in D3 */
3090                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
3091                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
3092                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
3093                 }
3094
3095                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
3096                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
3097                 pci_enable_wake(pdev, 3, 1);
3098                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
3099         } else {
3100                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
3101                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
3102                 pci_enable_wake(pdev, 3, 0);
3103                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
3104         }
3105
3106         pci_save_state(pdev);
3107
3108         if(adapter->hw.mac_type >= e1000_82540 &&
3109            adapter->hw.media_type == e1000_media_type_copper) {
3110                 manc = E1000_READ_REG(&adapter->hw, MANC);
3111                 if(manc & E1000_MANC_SMBUS_EN) {
3112                         manc |= E1000_MANC_ARP_EN;
3113                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
3114                         pci_enable_wake(pdev, 3, 1);
3115                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
3116                 }
3117         }
3118
3119         pci_disable_device(pdev);
3120
3121         state = (state > 0) ? 3 : 0;
3122         pci_set_power_state(pdev, state);
3123
3124         return 0;
3125 }
3126
3127 #ifdef CONFIG_PM
3128 static int
3129 e1000_resume(struct pci_dev *pdev)
3130 {
3131         struct net_device *netdev = pci_get_drvdata(pdev);
3132         struct e1000_adapter *adapter = netdev->priv;
3133         uint32_t manc, ret;
3134
3135         pci_set_power_state(pdev, 0);
3136         pci_restore_state(pdev);
3137         ret = pci_enable_device(pdev);
3138         if (pdev->is_busmaster)
3139                 pci_set_master(pdev);
3140
3141         pci_enable_wake(pdev, 3, 0);
3142         pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
3143
3144         e1000_reset(adapter);
3145         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
3146
3147         if(netif_running(netdev))
3148                 e1000_up(adapter);
3149
3150         netif_device_attach(netdev);
3151
3152         if(adapter->hw.mac_type >= e1000_82540 &&
3153            adapter->hw.media_type == e1000_media_type_copper) {
3154                 manc = E1000_READ_REG(&adapter->hw, MANC);
3155                 manc &= ~(E1000_MANC_ARP_EN);
3156                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
3157         }
3158
3159         return 0;
3160 }
3161 #endif
3162
3163 #ifdef CONFIG_NET_POLL_CONTROLLER
3164 /*
3165  * Polling 'interrupt' - used by things like netconsole to send skbs
3166  * without having to re-enable interrupts. It's not called while
3167  * the interrupt routine is executing.
3168  */
3169 static void
3170 e1000_netpoll (struct net_device *netdev)
3171 {
3172         struct e1000_adapter *adapter = netdev->priv;
3173         disable_irq(adapter->pdev->irq);
3174         e1000_intr(adapter->pdev->irq, netdev, NULL);
3175         enable_irq(adapter->pdev->irq);
3176 }
3177 #endif
3178
3179 /* e1000_main.c */