git.oblomov.eu Git - linux-2.6/blob - drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 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  * 6.0.44+      2/15/05
  33  *   o applied Anton's patch to resolve tx hang in hardware
  34  *   o Applied Andrew Mortons patch - e1000 stops working after resume
  35  */
  36
  37 char e1000_driver_name[] = "e1000";
  38 char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  39 #ifndef CONFIG_E1000_NAPI
  40 #define DRIVERNAPI
  41 #else
  42 #define DRIVERNAPI "-NAPI"
  43 #endif
  44 #define DRV_VERSION "6.0.54-k2"DRIVERNAPI
  45 char e1000_driver_version[] = DRV_VERSION;
  46 char e1000_copyright[] = "Copyright (c) 1999-2004 Intel Corporation.";
  47
  48 /* e1000_pci_tbl - PCI Device ID Table
  49  *
  50  * Last entry must be all 0s
  51  *
  52  * Macro expands to...
  53  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  54  */
  55 static struct pci_device_id e1000_pci_tbl[] = {
  56         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  57         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  58         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  61         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  62         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  75         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  76         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  78         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  79         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  86         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  87         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  88         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  89         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  90         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  91         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1099),
  93         /* required last entry */
  94         {0,}
  95 };
  96
  97 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
  98
  99 int e1000_up(struct e1000_adapter *adapter);
 100 void e1000_down(struct e1000_adapter *adapter);
 101 void e1000_reset(struct e1000_adapter *adapter);
 102 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 103 int e1000_setup_tx_resources(struct e1000_adapter *adapter);
 104 int e1000_setup_rx_resources(struct e1000_adapter *adapter);
 105 void e1000_free_tx_resources(struct e1000_adapter *adapter);
 106 void e1000_free_rx_resources(struct e1000_adapter *adapter);
 107 void e1000_update_stats(struct e1000_adapter *adapter);
 108
 109 /* Local Function Prototypes */
 110
 111 static int e1000_init_module(void);
 112 static void e1000_exit_module(void);
 113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 114 static void __devexit e1000_remove(struct pci_dev *pdev);
 115 static int e1000_sw_init(struct e1000_adapter *adapter);
 116 static int e1000_open(struct net_device *netdev);
 117 static int e1000_close(struct net_device *netdev);
 118 static void e1000_configure_tx(struct e1000_adapter *adapter);
 119 static void e1000_configure_rx(struct e1000_adapter *adapter);
 120 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 121 static void e1000_clean_tx_ring(struct e1000_adapter *adapter);
 122 static void e1000_clean_rx_ring(struct e1000_adapter *adapter);
 123 static void e1000_set_multi(struct net_device *netdev);
 124 static void e1000_update_phy_info(unsigned long data);
 125 static void e1000_watchdog(unsigned long data);
 126 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 127 static void e1000_82547_tx_fifo_stall(unsigned long data);
 128 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 129 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 130 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 131 static int e1000_set_mac(struct net_device *netdev, void *p);
 132 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 133 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter);
 134 #ifdef CONFIG_E1000_NAPI
 135 static int e1000_clean(struct net_device *netdev, int *budget);
 136 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 137                                     int *work_done, int work_to_do);
 138 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 139                                        int *work_done, int work_to_do);
 140 #else
 141 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter);
 142 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter);
 143 #endif
 144 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
 145 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter);
 146 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 147 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 148                            int cmd);
 149 void e1000_set_ethtool_ops(struct net_device *netdev);
 150 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 151 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 152 static void e1000_tx_timeout(struct net_device *dev);
 153 static void e1000_tx_timeout_task(struct net_device *dev);
 154 static void e1000_smartspeed(struct e1000_adapter *adapter);
 155 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 156                                               struct sk_buff *skb);
 157
 158 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 159 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 160 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 161 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 162
 163 static int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr);
 164 static int e1000_suspend(struct pci_dev *pdev, uint32_t state);
 165 #ifdef CONFIG_PM
 166 static int e1000_resume(struct pci_dev *pdev);
 167 #endif
 168
 169 #ifdef CONFIG_NET_POLL_CONTROLLER
 170 /* for netdump / net console */
 171 static void e1000_netpoll (struct net_device *netdev);
 172 #endif
 173
 174 struct notifier_block e1000_notifier_reboot = {
 175         .notifier_call  = e1000_notify_reboot,
 176         .next           = NULL,
 177         .priority       = 0
 178 };
 179
 180 /* Exported from other modules */
 181
 182 extern void e1000_check_options(struct e1000_adapter *adapter);
 183
 184 static struct pci_driver e1000_driver = {
 185         .name     = e1000_driver_name,
 186         .id_table = e1000_pci_tbl,
 187         .probe    = e1000_probe,
 188         .remove   = __devexit_p(e1000_remove),
 189         /* Power Managment Hooks */
 190 #ifdef CONFIG_PM
 191         .suspend  = e1000_suspend,
 192         .resume   = e1000_resume
 193 #endif
 194 };
 195
 196 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 197 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 198 MODULE_LICENSE("GPL");
 199 MODULE_VERSION(DRV_VERSION);
 200
 201 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 202 module_param(debug, int, 0);
 203 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 204
 205 /**
 206  * e1000_init_module - Driver Registration Routine
 207  *
 208  * e1000_init_module is the first routine called when the driver is
 209  * loaded. All it does is register with the PCI subsystem.
 210  **/
 211
 212 static int __init
 213 e1000_init_module(void)
 214 {
 215         int ret;
 216         printk(KERN_INFO "%s - version %s\n",
 217                e1000_driver_string, e1000_driver_version);
 218
 219         printk(KERN_INFO "%s\n", e1000_copyright);
 220
 221         ret = pci_module_init(&e1000_driver);
 222         if(ret >= 0) {
 223                 register_reboot_notifier(&e1000_notifier_reboot);
 224         }
 225         return ret;
 226 }
 227
 228 module_init(e1000_init_module);
 229
 230 /**
 231  * e1000_exit_module - Driver Exit Cleanup Routine
 232  *
 233  * e1000_exit_module is called just before the driver is removed
 234  * from memory.
 235  **/
 236
 237 static void __exit
 238 e1000_exit_module(void)
 239 {
 240         unregister_reboot_notifier(&e1000_notifier_reboot);
 241         pci_unregister_driver(&e1000_driver);
 242 }
 243
 244 module_exit(e1000_exit_module);
 245
 246 /**
 247  * e1000_irq_disable - Mask off interrupt generation on the NIC
 248  * @adapter: board private structure
 249  **/
 250
 251 static inline void
 252 e1000_irq_disable(struct e1000_adapter *adapter)
 253 {
 254         atomic_inc(&adapter->irq_sem);
 255         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 256         E1000_WRITE_FLUSH(&adapter->hw);
 257         synchronize_irq(adapter->pdev->irq);
 258 }
 259
 260 /**
 261  * e1000_irq_enable - Enable default interrupt generation settings
 262  * @adapter: board private structure
 263  **/
 264
 265 static inline void
 266 e1000_irq_enable(struct e1000_adapter *adapter)
 267 {
 268         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 269                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 270                 E1000_WRITE_FLUSH(&adapter->hw);
 271         }
 272 }
 273 void
 274 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 275 {
 276         struct net_device *netdev = adapter->netdev;
 277         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 278         uint16_t old_vid = adapter->mng_vlan_id;
 279         if(adapter->vlgrp) {
 280                 if(!adapter->vlgrp->vlan_devices[vid]) {
 281                         if(adapter->hw.mng_cookie.status &
 282                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 283                                 e1000_vlan_rx_add_vid(netdev, vid);
 284                                 adapter->mng_vlan_id = vid;
 285                         } else
 286                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 287
 288                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 289                                         (vid != old_vid) &&
 290                                         !adapter->vlgrp->vlan_devices[old_vid])
 291                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 292                 }
 293         }
 294 }
 295
 296 int
 297 e1000_up(struct e1000_adapter *adapter)
 298 {
 299         struct net_device *netdev = adapter->netdev;
 300         int err;
 301
 302         /* hardware has been reset, we need to reload some things */
 303
 304         /* Reset the PHY if it was previously powered down */
 305         if(adapter->hw.media_type == e1000_media_type_copper) {
 306                 uint16_t mii_reg;
 307                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 308                 if(mii_reg & MII_CR_POWER_DOWN)
 309                         e1000_phy_reset(&adapter->hw);
 310         }
 311
 312         e1000_set_multi(netdev);
 313
 314         e1000_restore_vlan(adapter);
 315
 316         e1000_configure_tx(adapter);
 317         e1000_setup_rctl(adapter);
 318         e1000_configure_rx(adapter);
 319         adapter->alloc_rx_buf(adapter);
 320
 321 #ifdef CONFIG_PCI_MSI
 322         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 323                 adapter->have_msi = TRUE;
 324                 if((err = pci_enable_msi(adapter->pdev))) {
 325                         DPRINTK(PROBE, ERR,
 326                          "Unable to allocate MSI interrupt Error: %d\n", err);
 327                         adapter->have_msi = FALSE;
 328                 }
 329         }
 330 #endif
 331         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 332                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 333                               netdev->name, netdev))) {
 334                 DPRINTK(PROBE, ERR,
 335                     "Unable to allocate interrupt Error: %d\n", err);
 336                 return err;
 337         }
 338
 339         mod_timer(&adapter->watchdog_timer, jiffies);
 340
 341 #ifdef CONFIG_E1000_NAPI
 342         netif_poll_enable(netdev);
 343 #endif
 344         e1000_irq_enable(adapter);
 345
 346         return 0;
 347 }
 348
 349 void
 350 e1000_down(struct e1000_adapter *adapter)
 351 {
 352         struct net_device *netdev = adapter->netdev;
 353
 354         e1000_irq_disable(adapter);
 355         free_irq(adapter->pdev->irq, netdev);
 356 #ifdef CONFIG_PCI_MSI
 357         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 358            adapter->have_msi == TRUE)
 359                 pci_disable_msi(adapter->pdev);
 360 #endif
 361         del_timer_sync(&adapter->tx_fifo_stall_timer);
 362         del_timer_sync(&adapter->watchdog_timer);
 363         del_timer_sync(&adapter->phy_info_timer);
 364
 365 #ifdef CONFIG_E1000_NAPI
 366         netif_poll_disable(netdev);
 367 #endif
 368         adapter->link_speed = 0;
 369         adapter->link_duplex = 0;
 370         netif_carrier_off(netdev);
 371         netif_stop_queue(netdev);
 372
 373         e1000_reset(adapter);
 374         e1000_clean_tx_ring(adapter);
 375         e1000_clean_rx_ring(adapter);
 376
 377         /* If WoL is not enabled
 378          * and management mode is not IAMT
 379          * Power down the PHY so no link is implied when interface is down */
 380         if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 381            adapter->hw.media_type == e1000_media_type_copper &&
 382            !e1000_check_mng_mode(&adapter->hw) &&
 383            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
 384                 uint16_t mii_reg;
 385                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 386                 mii_reg |= MII_CR_POWER_DOWN;
 387                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 388                 mdelay(1);
 389         }
 390 }
 391
 392 void
 393 e1000_reset(struct e1000_adapter *adapter)
 394 {
 395         struct net_device *netdev = adapter->netdev;
 396         uint32_t pba, manc;
 397         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 398         uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
 399
 400         /* Repartition Pba for greater than 9k mtu
 401          * To take effect CTRL.RST is required.
 402          */
 403
 404         switch (adapter->hw.mac_type) {
 405         case e1000_82547:
 406         case e1000_82547_rev_2:
 407                 pba = E1000_PBA_30K;
 408                 break;
 409         case e1000_82573:
 410                 pba = E1000_PBA_12K;
 411                 break;
 412         default:
 413                 pba = E1000_PBA_48K;
 414                 break;
 415         }
 416
 417         if((adapter->hw.mac_type != e1000_82573) &&
 418            (adapter->rx_buffer_len > E1000_RXBUFFER_8192)) {
 419                 pba -= 8; /* allocate more FIFO for Tx */
 420                 /* send an XOFF when there is enough space in the
 421                  * Rx FIFO to hold one extra full size Rx packet
 422                 */
 423                 fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
 424                                         ETHERNET_FCS_SIZE + 1;
 425                 fc_low_water_mark = fc_high_water_mark + 8;
 426         }
 427
 428
 429         if(adapter->hw.mac_type == e1000_82547) {
 430                 adapter->tx_fifo_head = 0;
 431                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 432                 adapter->tx_fifo_size =
 433                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 434                 atomic_set(&adapter->tx_fifo_stall, 0);
 435         }
 436
 437         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 438
 439         /* flow control settings */
 440         adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
 441                                     fc_high_water_mark;
 442         adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
 443                                    fc_low_water_mark;
 444         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 445         adapter->hw.fc_send_xon = 1;
 446         adapter->hw.fc = adapter->hw.original_fc;
 447
 448         /* Allow time for pending master requests to run */
 449         e1000_reset_hw(&adapter->hw);
 450         if(adapter->hw.mac_type >= e1000_82544)
 451                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 452         if(e1000_init_hw(&adapter->hw))
 453                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 454         e1000_update_mng_vlan(adapter);
 455         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 456         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 457
 458         e1000_reset_adaptive(&adapter->hw);
 459         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 460         if (adapter->en_mng_pt) {
 461                 manc = E1000_READ_REG(&adapter->hw, MANC);
 462                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 463                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 464         }
 465 }
 466
 467 /**
 468  * e1000_probe - Device Initialization Routine
 469  * @pdev: PCI device information struct
 470  * @ent: entry in e1000_pci_tbl
 471  *
 472  * Returns 0 on success, negative on failure
 473  *
 474  * e1000_probe initializes an adapter identified by a pci_dev structure.
 475  * The OS initialization, configuring of the adapter private structure,
 476  * and a hardware reset occur.
 477  **/
 478
 479 static int __devinit
 480 e1000_probe(struct pci_dev *pdev,
 481             const struct pci_device_id *ent)
 482 {
 483         struct net_device *netdev;
 484         struct e1000_adapter *adapter;
 485         unsigned long mmio_start, mmio_len;
 486         uint32_t swsm;
 487
 488         static int cards_found = 0;
 489         int i, err, pci_using_dac;
 490         uint16_t eeprom_data;
 491         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 492         if((err = pci_enable_device(pdev)))
 493                 return err;
 494
 495         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 496                 pci_using_dac = 1;
 497         } else {
 498                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 499                         E1000_ERR("No usable DMA configuration, aborting\n");
 500                         return err;
 501                 }
 502                 pci_using_dac = 0;
 503         }
 504
 505         if((err = pci_request_regions(pdev, e1000_driver_name)))
 506                 return err;
 507
 508         pci_set_master(pdev);
 509
 510         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 511         if(!netdev) {
 512                 err = -ENOMEM;
 513                 goto err_alloc_etherdev;
 514         }
 515
 516         SET_MODULE_OWNER(netdev);
 517         SET_NETDEV_DEV(netdev, &pdev->dev);
 518
 519         pci_set_drvdata(pdev, netdev);
 520         adapter = netdev->priv;
 521         adapter->netdev = netdev;
 522         adapter->pdev = pdev;
 523         adapter->hw.back = adapter;
 524         adapter->msg_enable = (1 << debug) - 1;
 525
 526         mmio_start = pci_resource_start(pdev, BAR_0);
 527         mmio_len = pci_resource_len(pdev, BAR_0);
 528
 529         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 530         if(!adapter->hw.hw_addr) {
 531                 err = -EIO;
 532                 goto err_ioremap;
 533         }
 534
 535         for(i = BAR_1; i <= BAR_5; i++) {
 536                 if(pci_resource_len(pdev, i) == 0)
 537                         continue;
 538                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 539                         adapter->hw.io_base = pci_resource_start(pdev, i);
 540                         break;
 541                 }
 542         }
 543
 544         netdev->open = &e1000_open;
 545         netdev->stop = &e1000_close;
 546         netdev->hard_start_xmit = &e1000_xmit_frame;
 547         netdev->get_stats = &e1000_get_stats;
 548         netdev->set_multicast_list = &e1000_set_multi;
 549         netdev->set_mac_address = &e1000_set_mac;
 550         netdev->change_mtu = &e1000_change_mtu;
 551         netdev->do_ioctl = &e1000_ioctl;
 552         e1000_set_ethtool_ops(netdev);
 553         netdev->tx_timeout = &e1000_tx_timeout;
 554         netdev->watchdog_timeo = 5 * HZ;
 555 #ifdef CONFIG_E1000_NAPI
 556         netdev->poll = &e1000_clean;
 557         netdev->weight = 64;
 558 #endif
 559         netdev->vlan_rx_register = e1000_vlan_rx_register;
 560         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 561         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 562 #ifdef CONFIG_NET_POLL_CONTROLLER
 563         netdev->poll_controller = e1000_netpoll;
 564 #endif
 565         strcpy(netdev->name, pci_name(pdev));
 566
 567         netdev->mem_start = mmio_start;
 568         netdev->mem_end = mmio_start + mmio_len;
 569         netdev->base_addr = adapter->hw.io_base;
 570
 571         adapter->bd_number = cards_found;
 572
 573         /* setup the private structure */
 574
 575         if((err = e1000_sw_init(adapter)))
 576                 goto err_sw_init;
 577
 578         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 579                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 580
 581         if(adapter->hw.mac_type >= e1000_82543) {
 582                 netdev->features = NETIF_F_SG |
 583                                    NETIF_F_HW_CSUM |
 584                                    NETIF_F_HW_VLAN_TX |
 585                                    NETIF_F_HW_VLAN_RX |
 586                                    NETIF_F_HW_VLAN_FILTER;
 587         }
 588
 589 #ifdef NETIF_F_TSO
 590         if((adapter->hw.mac_type >= e1000_82544) &&
 591            (adapter->hw.mac_type != e1000_82547))
 592                 netdev->features |= NETIF_F_TSO;
 593
 594 #ifdef NETIF_F_TSO_IPV6
 595         if(adapter->hw.mac_type > e1000_82547_rev_2)
 596                 netdev->features |= NETIF_F_TSO_IPV6;
 597 #endif
 598 #endif
 599         if(pci_using_dac)
 600                 netdev->features |= NETIF_F_HIGHDMA;
 601
 602         /* hard_start_xmit is safe against parallel locking */
 603         netdev->features |= NETIF_F_LLTX;
 604
 605         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 606
 607         /* before reading the EEPROM, reset the controller to
 608          * put the device in a known good starting state */
 609
 610         e1000_reset_hw(&adapter->hw);
 611
 612         /* make sure the EEPROM is good */
 613
 614         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 615                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 616                 err = -EIO;
 617                 goto err_eeprom;
 618         }
 619
 620         /* copy the MAC address out of the EEPROM */
 621
 622         if(e1000_read_mac_addr(&adapter->hw))
 623                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 624         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 625
 626         if(!is_valid_ether_addr(netdev->dev_addr)) {
 627                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 628                 err = -EIO;
 629                 goto err_eeprom;
 630         }
 631
 632         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 633
 634         e1000_get_bus_info(&adapter->hw);
 635
 636         init_timer(&adapter->tx_fifo_stall_timer);
 637         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 638         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 639
 640         init_timer(&adapter->watchdog_timer);
 641         adapter->watchdog_timer.function = &e1000_watchdog;
 642         adapter->watchdog_timer.data = (unsigned long) adapter;
 643
 644         INIT_WORK(&adapter->watchdog_task,
 645                 (void (*)(void *))e1000_watchdog_task, adapter);
 646
 647         init_timer(&adapter->phy_info_timer);
 648         adapter->phy_info_timer.function = &e1000_update_phy_info;
 649         adapter->phy_info_timer.data = (unsigned long) adapter;
 650
 651         INIT_WORK(&adapter->tx_timeout_task,
 652                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 653
 654         /* we're going to reset, so assume we have no link for now */
 655
 656         netif_carrier_off(netdev);
 657         netif_stop_queue(netdev);
 658
 659         e1000_check_options(adapter);
 660
 661         /* Initial Wake on LAN setting
 662          * If APM wake is enabled in the EEPROM,
 663          * enable the ACPI Magic Packet filter
 664          */
 665
 666         switch(adapter->hw.mac_type) {
 667         case e1000_82542_rev2_0:
 668         case e1000_82542_rev2_1:
 669         case e1000_82543:
 670                 break;
 671         case e1000_82544:
 672                 e1000_read_eeprom(&adapter->hw,
 673                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 674                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 675                 break;
 676         case e1000_82546:
 677         case e1000_82546_rev_3:
 678                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 679                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 680                         e1000_read_eeprom(&adapter->hw,
 681                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 682                         break;
 683                 }
 684                 /* Fall Through */
 685         default:
 686                 e1000_read_eeprom(&adapter->hw,
 687                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 688                 break;
 689         }
 690         if(eeprom_data & eeprom_apme_mask)
 691                 adapter->wol |= E1000_WUFC_MAG;
 692
 693         /* reset the hardware with the new settings */
 694         e1000_reset(adapter);
 695
 696         /* Let firmware know the driver has taken over */
 697         switch(adapter->hw.mac_type) {
 698         case e1000_82573:
 699                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 700                 E1000_WRITE_REG(&adapter->hw, SWSM,
 701                                 swsm | E1000_SWSM_DRV_LOAD);
 702                 break;
 703         default:
 704                 break;
 705         }
 706
 707         strcpy(netdev->name, "eth%d");
 708         if((err = register_netdev(netdev)))
 709                 goto err_register;
 710
 711         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 712
 713         cards_found++;
 714         return 0;
 715
 716 err_register:
 717 err_sw_init:
 718 err_eeprom:
 719         iounmap(adapter->hw.hw_addr);
 720 err_ioremap:
 721         free_netdev(netdev);
 722 err_alloc_etherdev:
 723         pci_release_regions(pdev);
 724         return err;
 725 }
 726
 727 /**
 728  * e1000_remove - Device Removal Routine
 729  * @pdev: PCI device information struct
 730  *
 731  * e1000_remove is called by the PCI subsystem to alert the driver
 732  * that it should release a PCI device.  The could be caused by a
 733  * Hot-Plug event, or because the driver is going to be removed from
 734  * memory.
 735  **/
 736
 737 static void __devexit
 738 e1000_remove(struct pci_dev *pdev)
 739 {
 740         struct net_device *netdev = pci_get_drvdata(pdev);
 741         struct e1000_adapter *adapter = netdev->priv;
 742         uint32_t manc, swsm;
 743
 744         flush_scheduled_work();
 745
 746         if(adapter->hw.mac_type >= e1000_82540 &&
 747            adapter->hw.media_type == e1000_media_type_copper) {
 748                 manc = E1000_READ_REG(&adapter->hw, MANC);
 749                 if(manc & E1000_MANC_SMBUS_EN) {
 750                         manc |= E1000_MANC_ARP_EN;
 751                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 752                 }
 753         }
 754
 755         switch(adapter->hw.mac_type) {
 756         case e1000_82573:
 757                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 758                 E1000_WRITE_REG(&adapter->hw, SWSM,
 759                                 swsm & ~E1000_SWSM_DRV_LOAD);
 760                 break;
 761
 762         default:
 763                 break;
 764         }
 765
 766         unregister_netdev(netdev);
 767
 768         if(!e1000_check_phy_reset_block(&adapter->hw))
 769                 e1000_phy_hw_reset(&adapter->hw);
 770
 771         iounmap(adapter->hw.hw_addr);
 772         pci_release_regions(pdev);
 773
 774         free_netdev(netdev);
 775
 776         pci_disable_device(pdev);
 777 }
 778
 779 /**
 780  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 781  * @adapter: board private structure to initialize
 782  *
 783  * e1000_sw_init initializes the Adapter private data structure.
 784  * Fields are initialized based on PCI device information and
 785  * OS network device settings (MTU size).
 786  **/
 787
 788 static int __devinit
 789 e1000_sw_init(struct e1000_adapter *adapter)
 790 {
 791         struct e1000_hw *hw = &adapter->hw;
 792         struct net_device *netdev = adapter->netdev;
 793         struct pci_dev *pdev = adapter->pdev;
 794
 795         /* PCI config space info */
 796
 797         hw->vendor_id = pdev->vendor;
 798         hw->device_id = pdev->device;
 799         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 800         hw->subsystem_id = pdev->subsystem_device;
 801
 802         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 803
 804         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 805
 806         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 807         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 808         hw->max_frame_size = netdev->mtu +
 809                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 810         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 811
 812         /* identify the MAC */
 813
 814         if(e1000_set_mac_type(hw)) {
 815                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 816                 return -EIO;
 817         }
 818
 819         /* initialize eeprom parameters */
 820
 821         if(e1000_init_eeprom_params(hw)) {
 822                 E1000_ERR("EEPROM initialization failed\n");
 823                 return -EIO;
 824         }
 825
 826         switch(hw->mac_type) {
 827         default:
 828                 break;
 829         case e1000_82541:
 830         case e1000_82547:
 831         case e1000_82541_rev_2:
 832         case e1000_82547_rev_2:
 833                 hw->phy_init_script = 1;
 834                 break;
 835         }
 836
 837         e1000_set_media_type(hw);
 838
 839         hw->wait_autoneg_complete = FALSE;
 840         hw->tbi_compatibility_en = TRUE;
 841         hw->adaptive_ifs = TRUE;
 842
 843         /* Copper options */
 844
 845         if(hw->media_type == e1000_media_type_copper) {
 846                 hw->mdix = AUTO_ALL_MODES;
 847                 hw->disable_polarity_correction = FALSE;
 848                 hw->master_slave = E1000_MASTER_SLAVE;
 849         }
 850
 851         atomic_set(&adapter->irq_sem, 1);
 852         spin_lock_init(&adapter->stats_lock);
 853         spin_lock_init(&adapter->tx_lock);
 854
 855         return 0;
 856 }
 857
 858 /**
 859  * e1000_open - Called when a network interface is made active
 860  * @netdev: network interface device structure
 861  *
 862  * Returns 0 on success, negative value on failure
 863  *
 864  * The open entry point is called when a network interface is made
 865  * active by the system (IFF_UP).  At this point all resources needed
 866  * for transmit and receive operations are allocated, the interrupt
 867  * handler is registered with the OS, the watchdog timer is started,
 868  * and the stack is notified that the interface is ready.
 869  **/
 870
 871 static int
 872 e1000_open(struct net_device *netdev)
 873 {
 874         struct e1000_adapter *adapter = netdev->priv;
 875         int err;
 876
 877         /* allocate transmit descriptors */
 878
 879         if((err = e1000_setup_tx_resources(adapter)))
 880                 goto err_setup_tx;
 881
 882         /* allocate receive descriptors */
 883
 884         if((err = e1000_setup_rx_resources(adapter)))
 885                 goto err_setup_rx;
 886
 887         if((err = e1000_up(adapter)))
 888                 goto err_up;
 889         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 890         if((adapter->hw.mng_cookie.status &
 891                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
 892                 e1000_update_mng_vlan(adapter);
 893         }
 894
 895         return E1000_SUCCESS;
 896
 897 err_up:
 898         e1000_free_rx_resources(adapter);
 899 err_setup_rx:
 900         e1000_free_tx_resources(adapter);
 901 err_setup_tx:
 902         e1000_reset(adapter);
 903
 904         return err;
 905 }
 906
 907 /**
 908  * e1000_close - Disables a network interface
 909  * @netdev: network interface device structure
 910  *
 911  * Returns 0, this is not allowed to fail
 912  *
 913  * The close entry point is called when an interface is de-activated
 914  * by the OS.  The hardware is still under the drivers control, but
 915  * needs to be disabled.  A global MAC reset is issued to stop the
 916  * hardware, and all transmit and receive resources are freed.
 917  **/
 918
 919 static int
 920 e1000_close(struct net_device *netdev)
 921 {
 922         struct e1000_adapter *adapter = netdev->priv;
 923
 924         e1000_down(adapter);
 925
 926         e1000_free_tx_resources(adapter);
 927         e1000_free_rx_resources(adapter);
 928
 929         if((adapter->hw.mng_cookie.status &
 930                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
 931                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
 932         }
 933         return 0;
 934 }
 935
 936 /**
 937  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
 938  * @adapter: address of board private structure
 939  * @start: address of beginning of memory
 940  * @len: length of memory
 941  **/
 942 static inline boolean_t
 943 e1000_check_64k_bound(struct e1000_adapter *adapter,
 944                       void *start, unsigned long len)
 945 {
 946         unsigned long begin = (unsigned long) start;
 947         unsigned long end = begin + len;
 948
 949         /* First rev 82545 and 82546 need to not allow any memory
 950          * write location to cross 64k boundary due to errata 23 */
 951         if (adapter->hw.mac_type == e1000_82545 ||
 952             adapter->hw.mac_type == e1000_82546) {
 953                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
 954         }
 955
 956         return TRUE;
 957 }
 958
 959 /**
 960  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
 961  * @adapter: board private structure
 962  *
 963  * Return 0 on success, negative on failure
 964  **/
 965
 966 int
 967 e1000_setup_tx_resources(struct e1000_adapter *adapter)
 968 {
 969         struct e1000_desc_ring *txdr = &adapter->tx_ring;
 970         struct pci_dev *pdev = adapter->pdev;
 971         int size;
 972
 973         size = sizeof(struct e1000_buffer) * txdr->count;
 974         txdr->buffer_info = vmalloc(size);
 975         if(!txdr->buffer_info) {
 976                 DPRINTK(PROBE, ERR,
 977                 "Unable to allocate memory for the transmit descriptor ring\n");
 978                 return -ENOMEM;
 979         }
 980         memset(txdr->buffer_info, 0, size);
 981
 982         /* round up to nearest 4K */
 983
 984         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
 985         E1000_ROUNDUP(txdr->size, 4096);
 986
 987         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
 988         if(!txdr->desc) {
 989 setup_tx_desc_die:
 990                 vfree(txdr->buffer_info);
 991                 DPRINTK(PROBE, ERR,
 992                 "Unable to allocate memory for the transmit descriptor ring\n");
 993                 return -ENOMEM;
 994         }
 995
 996         /* Fix for errata 23, can't cross 64kB boundary */
 997         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
 998                 void *olddesc = txdr->desc;
 999                 dma_addr_t olddma = txdr->dma;
1000                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1001                                      "at %p\n", txdr->size, txdr->desc);
1002                 /* Try again, without freeing the previous */
1003                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1004                 if(!txdr->desc) {
1005                 /* Failed allocation, critical failure */
1006                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1007                         goto setup_tx_desc_die;
1008                 }
1009
1010                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1011                         /* give up */
1012                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1013                                             txdr->dma);
1014                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1015                         DPRINTK(PROBE, ERR,
1016                                 "Unable to allocate aligned memory "
1017                                 "for the transmit descriptor ring\n");
1018                         vfree(txdr->buffer_info);
1019                         return -ENOMEM;
1020                 } else {
1021                         /* Free old allocation, new allocation was successful */
1022                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1023                 }
1024         }
1025         memset(txdr->desc, 0, txdr->size);
1026
1027         txdr->next_to_use = 0;
1028         txdr->next_to_clean = 0;
1029
1030         return 0;
1031 }
1032
1033 /**
1034  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1035  * @adapter: board private structure
1036  *
1037  * Configure the Tx unit of the MAC after a reset.
1038  **/
1039
1040 static void
1041 e1000_configure_tx(struct e1000_adapter *adapter)
1042 {
1043         uint64_t tdba = adapter->tx_ring.dma;
1044         uint32_t tdlen = adapter->tx_ring.count * sizeof(struct e1000_tx_desc);
1045         uint32_t tctl, tipg;
1046
1047         E1000_WRITE_REG(&adapter->hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1048         E1000_WRITE_REG(&adapter->hw, TDBAH, (tdba >> 32));
1049
1050         E1000_WRITE_REG(&adapter->hw, TDLEN, tdlen);
1051
1052         /* Setup the HW Tx Head and Tail descriptor pointers */
1053
1054         E1000_WRITE_REG(&adapter->hw, TDH, 0);
1055         E1000_WRITE_REG(&adapter->hw, TDT, 0);
1056
1057         /* Set the default values for the Tx Inter Packet Gap timer */
1058
1059         switch (adapter->hw.mac_type) {
1060         case e1000_82542_rev2_0:
1061         case e1000_82542_rev2_1:
1062                 tipg = DEFAULT_82542_TIPG_IPGT;
1063                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1064                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1065                 break;
1066         default:
1067                 if(adapter->hw.media_type == e1000_media_type_fiber ||
1068                    adapter->hw.media_type == e1000_media_type_internal_serdes)
1069                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1070                 else
1071                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1072                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1073                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1074         }
1075         E1000_WRITE_REG(&adapter->hw, TIPG, tipg);
1076
1077         /* Set the Tx Interrupt Delay register */
1078
1079         E1000_WRITE_REG(&adapter->hw, TIDV, adapter->tx_int_delay);
1080         if(adapter->hw.mac_type >= e1000_82540)
1081                 E1000_WRITE_REG(&adapter->hw, TADV, adapter->tx_abs_int_delay);
1082
1083         /* Program the Transmit Control Register */
1084
1085         tctl = E1000_READ_REG(&adapter->hw, TCTL);
1086
1087         tctl &= ~E1000_TCTL_CT;
1088         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP |
1089                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1090
1091         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1092
1093         e1000_config_collision_dist(&adapter->hw);
1094
1095         /* Setup Transmit Descriptor Settings for eop descriptor */
1096         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1097                 E1000_TXD_CMD_IFCS;
1098
1099         if(adapter->hw.mac_type < e1000_82543)
1100                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1101         else
1102                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1103
1104         /* Cache if we're 82544 running in PCI-X because we'll
1105          * need this to apply a workaround later in the send path. */
1106         if(adapter->hw.mac_type == e1000_82544 &&
1107            adapter->hw.bus_type == e1000_bus_type_pcix)
1108                 adapter->pcix_82544 = 1;
1109 }
1110
1111 /**
1112  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1113  * @adapter: board private structure
1114  *
1115  * Returns 0 on success, negative on failure
1116  **/
1117
1118 int
1119 e1000_setup_rx_resources(struct e1000_adapter *adapter)
1120 {
1121         struct e1000_desc_ring *rxdr = &adapter->rx_ring;
1122         struct pci_dev *pdev = adapter->pdev;
1123         int size, desc_len;
1124
1125         size = sizeof(struct e1000_buffer) * rxdr->count;
1126         rxdr->buffer_info = vmalloc(size);
1127         if(!rxdr->buffer_info) {
1128                 DPRINTK(PROBE, ERR,
1129                 "Unable to allocate memory for the receive descriptor ring\n");
1130                 return -ENOMEM;
1131         }
1132         memset(rxdr->buffer_info, 0, size);
1133
1134         size = sizeof(struct e1000_ps_page) * rxdr->count;
1135         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1136         if(!rxdr->ps_page) {
1137                 vfree(rxdr->buffer_info);
1138                 DPRINTK(PROBE, ERR,
1139                 "Unable to allocate memory for the receive descriptor ring\n");
1140                 return -ENOMEM;
1141         }
1142         memset(rxdr->ps_page, 0, size);
1143
1144         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1145         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1146         if(!rxdr->ps_page_dma) {
1147                 vfree(rxdr->buffer_info);
1148                 kfree(rxdr->ps_page);
1149                 DPRINTK(PROBE, ERR,
1150                 "Unable to allocate memory for the receive descriptor ring\n");
1151                 return -ENOMEM;
1152         }
1153         memset(rxdr->ps_page_dma, 0, size);
1154
1155         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1156                 desc_len = sizeof(struct e1000_rx_desc);
1157         else
1158                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1159
1160         /* Round up to nearest 4K */
1161
1162         rxdr->size = rxdr->count * desc_len;
1163         E1000_ROUNDUP(rxdr->size, 4096);
1164
1165         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1166
1167         if(!rxdr->desc) {
1168 setup_rx_desc_die:
1169                 vfree(rxdr->buffer_info);
1170                 kfree(rxdr->ps_page);
1171                 kfree(rxdr->ps_page_dma);
1172                 DPRINTK(PROBE, ERR,
1173                 "Unable to allocate memory for the receive descriptor ring\n");
1174                 return -ENOMEM;
1175         }
1176
1177         /* Fix for errata 23, can't cross 64kB boundary */
1178         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1179                 void *olddesc = rxdr->desc;
1180                 dma_addr_t olddma = rxdr->dma;
1181                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1182                                      "at %p\n", rxdr->size, rxdr->desc);
1183                 /* Try again, without freeing the previous */
1184                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1185                 if(!rxdr->desc) {
1186                 /* Failed allocation, critical failure */
1187                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1188                         goto setup_rx_desc_die;
1189                 }
1190
1191                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1192                         /* give up */
1193                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1194                                             rxdr->dma);
1195                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1196                         DPRINTK(PROBE, ERR,
1197                                 "Unable to allocate aligned memory "
1198                                 "for the receive descriptor ring\n");
1199                         vfree(rxdr->buffer_info);
1200                         kfree(rxdr->ps_page);
1201                         kfree(rxdr->ps_page_dma);
1202                         return -ENOMEM;
1203                 } else {
1204                         /* Free old allocation, new allocation was successful */
1205                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1206                 }
1207         }
1208         memset(rxdr->desc, 0, rxdr->size);
1209
1210         rxdr->next_to_clean = 0;
1211         rxdr->next_to_use = 0;
1212
1213         return 0;
1214 }
1215
1216 /**
1217  * e1000_setup_rctl - configure the receive control registers
1218  * @adapter: Board private structure
1219  **/
1220
1221 static void
1222 e1000_setup_rctl(struct e1000_adapter *adapter)
1223 {
1224         uint32_t rctl, rfctl;
1225         uint32_t psrctl = 0;
1226
1227         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1228
1229         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1230
1231         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1232                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1233                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1234
1235         if(adapter->hw.tbi_compatibility_on == 1)
1236                 rctl |= E1000_RCTL_SBP;
1237         else
1238                 rctl &= ~E1000_RCTL_SBP;
1239
1240         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1241                 rctl &= ~E1000_RCTL_LPE;
1242         else
1243                 rctl |= E1000_RCTL_LPE;
1244
1245         /* Setup buffer sizes */
1246         if(adapter->hw.mac_type == e1000_82573) {
1247                 /* We can now specify buffers in 1K increments.
1248                  * BSIZE and BSEX are ignored in this case. */
1249                 rctl |= adapter->rx_buffer_len << 0x11;
1250         } else {
1251                 rctl &= ~E1000_RCTL_SZ_4096;
1252                 rctl |= E1000_RCTL_BSEX;
1253                 switch (adapter->rx_buffer_len) {
1254                 case E1000_RXBUFFER_2048:
1255                 default:
1256                         rctl |= E1000_RCTL_SZ_2048;
1257                         rctl &= ~E1000_RCTL_BSEX;
1258                         break;
1259                 case E1000_RXBUFFER_4096:
1260                         rctl |= E1000_RCTL_SZ_4096;
1261                         break;
1262                 case E1000_RXBUFFER_8192:
1263                         rctl |= E1000_RCTL_SZ_8192;
1264                         break;
1265                 case E1000_RXBUFFER_16384:
1266                         rctl |= E1000_RCTL_SZ_16384;
1267                         break;
1268                 }
1269         }
1270
1271 #ifdef CONFIG_E1000_PACKET_SPLIT
1272         /* 82571 and greater support packet-split where the protocol
1273          * header is placed in skb->data and the packet data is
1274          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1275          * In the case of a non-split, skb->data is linearly filled,
1276          * followed by the page buffers.  Therefore, skb->data is
1277          * sized to hold the largest protocol header.
1278          */
1279         adapter->rx_ps = (adapter->hw.mac_type > e1000_82547_rev_2)
1280                           && (adapter->netdev->mtu
1281                               < ((3 * PAGE_SIZE) + adapter->rx_ps_bsize0));
1282 #endif
1283         if(adapter->rx_ps) {
1284                 /* Configure extra packet-split registers */
1285                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1286                 rfctl |= E1000_RFCTL_EXTEN;
1287                 /* disable IPv6 packet split support */
1288                 rfctl |= E1000_RFCTL_IPV6_DIS;
1289                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1290
1291                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1292
1293                 psrctl |= adapter->rx_ps_bsize0 >>
1294                         E1000_PSRCTL_BSIZE0_SHIFT;
1295                 psrctl |= PAGE_SIZE >>
1296                         E1000_PSRCTL_BSIZE1_SHIFT;
1297                 psrctl |= PAGE_SIZE <<
1298                         E1000_PSRCTL_BSIZE2_SHIFT;
1299                 psrctl |= PAGE_SIZE <<
1300                         E1000_PSRCTL_BSIZE3_SHIFT;
1301
1302                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1303         }
1304
1305         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1306 }
1307
1308 /**
1309  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1310  * @adapter: board private structure
1311  *
1312  * Configure the Rx unit of the MAC after a reset.
1313  **/
1314
1315 static void
1316 e1000_configure_rx(struct e1000_adapter *adapter)
1317 {
1318         uint64_t rdba = adapter->rx_ring.dma;
1319         uint32_t rdlen, rctl, rxcsum;
1320
1321         if(adapter->rx_ps) {
1322                 rdlen = adapter->rx_ring.count *
1323                         sizeof(union e1000_rx_desc_packet_split);
1324                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1325                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1326         } else {
1327                 rdlen = adapter->rx_ring.count * sizeof(struct e1000_rx_desc);
1328                 adapter->clean_rx = e1000_clean_rx_irq;
1329                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1330         }
1331
1332         /* disable receives while setting up the descriptors */
1333         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1334         E1000_WRITE_REG(&adapter->hw, RCTL, rctl & ~E1000_RCTL_EN);
1335
1336         /* set the Receive Delay Timer Register */
1337         E1000_WRITE_REG(&adapter->hw, RDTR, adapter->rx_int_delay);
1338
1339         if(adapter->hw.mac_type >= e1000_82540) {
1340                 E1000_WRITE_REG(&adapter->hw, RADV, adapter->rx_abs_int_delay);
1341                 if(adapter->itr > 1)
1342                         E1000_WRITE_REG(&adapter->hw, ITR,
1343                                 1000000000 / (adapter->itr * 256));
1344         }
1345
1346         /* Setup the Base and Length of the Rx Descriptor Ring */
1347         E1000_WRITE_REG(&adapter->hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1348         E1000_WRITE_REG(&adapter->hw, RDBAH, (rdba >> 32));
1349
1350         E1000_WRITE_REG(&adapter->hw, RDLEN, rdlen);
1351
1352         /* Setup the HW Rx Head and Tail Descriptor Pointers */
1353         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1354         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1355
1356         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1357         if(adapter->hw.mac_type >= e1000_82543) {
1358                 rxcsum = E1000_READ_REG(&adapter->hw, RXCSUM);
1359                 if(adapter->rx_csum == TRUE) {
1360                         rxcsum |= E1000_RXCSUM_TUOFL;
1361
1362                         /* Enable 82573 IPv4 payload checksum for UDP fragments
1363                          * Must be used in conjunction with packet-split. */
1364                         if((adapter->hw.mac_type > e1000_82547_rev_2) &&
1365                            (adapter->rx_ps)) {
1366                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1367                         }
1368                 } else {
1369                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1370                         /* don't need to clear IPPCSE as it defaults to 0 */
1371                 }
1372                 E1000_WRITE_REG(&adapter->hw, RXCSUM, rxcsum);
1373         }
1374
1375         if (adapter->hw.mac_type == e1000_82573)
1376                 E1000_WRITE_REG(&adapter->hw, ERT, 0x0100);
1377
1378         /* Enable Receives */
1379         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1380 }
1381
1382 /**
1383  * e1000_free_tx_resources - Free Tx Resources
1384  * @adapter: board private structure
1385  *
1386  * Free all transmit software resources
1387  **/
1388
1389 void
1390 e1000_free_tx_resources(struct e1000_adapter *adapter)
1391 {
1392         struct pci_dev *pdev = adapter->pdev;
1393
1394         e1000_clean_tx_ring(adapter);
1395
1396         vfree(adapter->tx_ring.buffer_info);
1397         adapter->tx_ring.buffer_info = NULL;
1398
1399         pci_free_consistent(pdev, adapter->tx_ring.size,
1400                             adapter->tx_ring.desc, adapter->tx_ring.dma);
1401
1402         adapter->tx_ring.desc = NULL;
1403 }
1404
1405 static inline void
1406 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1407                         struct e1000_buffer *buffer_info)
1408 {
1409         if(buffer_info->dma) {
1410                 pci_unmap_page(adapter->pdev,
1411                                 buffer_info->dma,
1412                                 buffer_info->length,
1413                                 PCI_DMA_TODEVICE);
1414                 buffer_info->dma = 0;
1415         }
1416         if(buffer_info->skb) {
1417                 dev_kfree_skb_any(buffer_info->skb);
1418                 buffer_info->skb = NULL;
1419         }
1420 }
1421
1422 /**
1423  * e1000_clean_tx_ring - Free Tx Buffers
1424  * @adapter: board private structure
1425  **/
1426
1427 static void
1428 e1000_clean_tx_ring(struct e1000_adapter *adapter)
1429 {
1430         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1431         struct e1000_buffer *buffer_info;
1432         unsigned long size;
1433         unsigned int i;
1434
1435         /* Free all the Tx ring sk_buffs */
1436
1437         if (likely(adapter->previous_buffer_info.skb != NULL)) {
1438                 e1000_unmap_and_free_tx_resource(adapter,
1439                                 &adapter->previous_buffer_info);
1440         }
1441
1442         for(i = 0; i < tx_ring->count; i++) {
1443                 buffer_info = &tx_ring->buffer_info[i];
1444                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1445         }
1446
1447         size = sizeof(struct e1000_buffer) * tx_ring->count;
1448         memset(tx_ring->buffer_info, 0, size);
1449
1450         /* Zero out the descriptor ring */
1451
1452         memset(tx_ring->desc, 0, tx_ring->size);
1453
1454         tx_ring->next_to_use = 0;
1455         tx_ring->next_to_clean = 0;
1456
1457         E1000_WRITE_REG(&adapter->hw, TDH, 0);
1458         E1000_WRITE_REG(&adapter->hw, TDT, 0);
1459 }
1460
1461 /**
1462  * e1000_free_rx_resources - Free Rx Resources
1463  * @adapter: board private structure
1464  *
1465  * Free all receive software resources
1466  **/
1467
1468 void
1469 e1000_free_rx_resources(struct e1000_adapter *adapter)
1470 {
1471         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1472         struct pci_dev *pdev = adapter->pdev;
1473
1474         e1000_clean_rx_ring(adapter);
1475
1476         vfree(rx_ring->buffer_info);
1477         rx_ring->buffer_info = NULL;
1478         kfree(rx_ring->ps_page);
1479         rx_ring->ps_page = NULL;
1480         kfree(rx_ring->ps_page_dma);
1481         rx_ring->ps_page_dma = NULL;
1482
1483         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1484
1485         rx_ring->desc = NULL;
1486 }
1487
1488 /**
1489  * e1000_clean_rx_ring - Free Rx Buffers
1490  * @adapter: board private structure
1491  **/
1492
1493 static void
1494 e1000_clean_rx_ring(struct e1000_adapter *adapter)
1495 {
1496         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
1497         struct e1000_buffer *buffer_info;
1498         struct e1000_ps_page *ps_page;
1499         struct e1000_ps_page_dma *ps_page_dma;
1500         struct pci_dev *pdev = adapter->pdev;
1501         unsigned long size;
1502         unsigned int i, j;
1503
1504         /* Free all the Rx ring sk_buffs */
1505
1506         for(i = 0; i < rx_ring->count; i++) {
1507                 buffer_info = &rx_ring->buffer_info[i];
1508                 if(buffer_info->skb) {
1509                         ps_page = &rx_ring->ps_page[i];
1510                         ps_page_dma = &rx_ring->ps_page_dma[i];
1511                         pci_unmap_single(pdev,
1512                                          buffer_info->dma,
1513                                          buffer_info->length,
1514                                          PCI_DMA_FROMDEVICE);
1515
1516                         dev_kfree_skb(buffer_info->skb);
1517                         buffer_info->skb = NULL;
1518
1519                         for(j = 0; j < PS_PAGE_BUFFERS; j++) {
1520                                 if(!ps_page->ps_page[j]) break;
1521                                 pci_unmap_single(pdev,
1522                                                  ps_page_dma->ps_page_dma[j],
1523                                                  PAGE_SIZE, PCI_DMA_FROMDEVICE);
1524                                 ps_page_dma->ps_page_dma[j] = 0;
1525                                 put_page(ps_page->ps_page[j]);
1526                                 ps_page->ps_page[j] = NULL;
1527                         }
1528                 }
1529         }
1530
1531         size = sizeof(struct e1000_buffer) * rx_ring->count;
1532         memset(rx_ring->buffer_info, 0, size);
1533         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1534         memset(rx_ring->ps_page, 0, size);
1535         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1536         memset(rx_ring->ps_page_dma, 0, size);
1537
1538         /* Zero out the descriptor ring */
1539
1540         memset(rx_ring->desc, 0, rx_ring->size);
1541
1542         rx_ring->next_to_clean = 0;
1543         rx_ring->next_to_use = 0;
1544
1545         E1000_WRITE_REG(&adapter->hw, RDH, 0);
1546         E1000_WRITE_REG(&adapter->hw, RDT, 0);
1547 }
1548
1549 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1550  * and memory write and invalidate disabled for certain operations
1551  */
1552 static void
1553 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1554 {
1555         struct net_device *netdev = adapter->netdev;
1556         uint32_t rctl;
1557
1558         e1000_pci_clear_mwi(&adapter->hw);
1559
1560         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1561         rctl |= E1000_RCTL_RST;
1562         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1563         E1000_WRITE_FLUSH(&adapter->hw);
1564         mdelay(5);
1565
1566         if(netif_running(netdev))
1567                 e1000_clean_rx_ring(adapter);
1568 }
1569
1570 static void
1571 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1572 {
1573         struct net_device *netdev = adapter->netdev;
1574         uint32_t rctl;
1575
1576         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1577         rctl &= ~E1000_RCTL_RST;
1578         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1579         E1000_WRITE_FLUSH(&adapter->hw);
1580         mdelay(5);
1581
1582         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
1583                 e1000_pci_set_mwi(&adapter->hw);
1584
1585         if(netif_running(netdev)) {
1586                 e1000_configure_rx(adapter);
1587                 e1000_alloc_rx_buffers(adapter);
1588         }
1589 }
1590
1591 /**
1592  * e1000_set_mac - Change the Ethernet Address of the NIC
1593  * @netdev: network interface device structure
1594  * @p: pointer to an address structure
1595  *
1596  * Returns 0 on success, negative on failure
1597  **/
1598
1599 static int
1600 e1000_set_mac(struct net_device *netdev, void *p)
1601 {
1602         struct e1000_adapter *adapter = netdev->priv;
1603         struct sockaddr *addr = p;
1604
1605         if(!is_valid_ether_addr(addr->sa_data))
1606                 return -EADDRNOTAVAIL;
1607
1608         /* 82542 2.0 needs to be in reset to write receive address registers */
1609
1610         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1611                 e1000_enter_82542_rst(adapter);
1612
1613         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1614         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
1615
1616         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
1617
1618         if(adapter->hw.mac_type == e1000_82542_rev2_0)
1619                 e1000_leave_82542_rst(adapter);
1620
1621         return 0;
1622 }
1623
1624 /**
1625  * e1000_set_multi - Multicast and Promiscuous mode set
1626  * @netdev: network interface device structure
1627  *
1628  * The set_multi entry point is called whenever the multicast address
1629  * list or the network interface flags are updated.  This routine is
1630  * responsible for configuring the hardware for proper multicast,
1631  * promiscuous mode, and all-multi behavior.
1632  **/
1633
1634 static void
1635 e1000_set_multi(struct net_device *netdev)
1636 {
1637         struct e1000_adapter *adapter = netdev->priv;
1638         struct e1000_hw *hw = &adapter->hw;
1639         struct dev_mc_list *mc_ptr;
1640         unsigned long flags;
1641         uint32_t rctl;
1642         uint32_t hash_value;
1643         int i;
1644
1645         spin_lock_irqsave(&adapter->tx_lock, flags);
1646
1647         /* Check for Promiscuous and All Multicast modes */
1648
1649         rctl = E1000_READ_REG(hw, RCTL);
1650
1651         if(netdev->flags & IFF_PROMISC) {
1652                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
1653         } else if(netdev->flags & IFF_ALLMULTI) {
1654                 rctl |= E1000_RCTL_MPE;
1655                 rctl &= ~E1000_RCTL_UPE;
1656         } else {
1657                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
1658         }
1659
1660         E1000_WRITE_REG(hw, RCTL, rctl);
1661
1662         /* 82542 2.0 needs to be in reset to write receive address registers */
1663
1664         if(hw->mac_type == e1000_82542_rev2_0)
1665                 e1000_enter_82542_rst(adapter);
1666
1667         /* load the first 14 multicast address into the exact filters 1-14
1668          * RAR 0 is used for the station MAC adddress
1669          * if there are not 14 addresses, go ahead and clear the filters
1670          */
1671         mc_ptr = netdev->mc_list;
1672
1673         for(i = 1; i < E1000_RAR_ENTRIES; i++) {
1674                 if(mc_ptr) {
1675                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
1676                         mc_ptr = mc_ptr->next;
1677                 } else {
1678                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
1679                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
1680                 }
1681         }
1682
1683         /* clear the old settings from the multicast hash table */
1684
1685         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
1686                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
1687
1688         /* load any remaining addresses into the hash table */
1689
1690         for(; mc_ptr; mc_ptr = mc_ptr->next) {
1691                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
1692                 e1000_mta_set(hw, hash_value);
1693         }
1694
1695         if(hw->mac_type == e1000_82542_rev2_0)
1696                 e1000_leave_82542_rst(adapter);
1697
1698         spin_unlock_irqrestore(&adapter->tx_lock, flags);
1699 }
1700
1701 /* Need to wait a few seconds after link up to get diagnostic information from
1702  * the phy */
1703
1704 static void
1705 e1000_update_phy_info(unsigned long data)
1706 {
1707         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1708         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
1709 }
1710
1711 /**
1712  * e1000_82547_tx_fifo_stall - Timer Call-back
1713  * @data: pointer to adapter cast into an unsigned long
1714  **/
1715
1716 static void
1717 e1000_82547_tx_fifo_stall(unsigned long data)
1718 {
1719         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1720         struct net_device *netdev = adapter->netdev;
1721         uint32_t tctl;
1722
1723         if(atomic_read(&adapter->tx_fifo_stall)) {
1724                 if((E1000_READ_REG(&adapter->hw, TDT) ==
1725                     E1000_READ_REG(&adapter->hw, TDH)) &&
1726                    (E1000_READ_REG(&adapter->hw, TDFT) ==
1727                     E1000_READ_REG(&adapter->hw, TDFH)) &&
1728                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
1729                     E1000_READ_REG(&adapter->hw, TDFHS))) {
1730                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
1731                         E1000_WRITE_REG(&adapter->hw, TCTL,
1732                                         tctl & ~E1000_TCTL_EN);
1733                         E1000_WRITE_REG(&adapter->hw, TDFT,
1734                                         adapter->tx_head_addr);
1735                         E1000_WRITE_REG(&adapter->hw, TDFH,
1736                                         adapter->tx_head_addr);
1737                         E1000_WRITE_REG(&adapter->hw, TDFTS,
1738                                         adapter->tx_head_addr);
1739                         E1000_WRITE_REG(&adapter->hw, TDFHS,
1740                                         adapter->tx_head_addr);
1741                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1742                         E1000_WRITE_FLUSH(&adapter->hw);
1743
1744                         adapter->tx_fifo_head = 0;
1745                         atomic_set(&adapter->tx_fifo_stall, 0);
1746                         netif_wake_queue(netdev);
1747                 } else {
1748                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
1749                 }
1750         }
1751 }
1752
1753 /**
1754  * e1000_watchdog - Timer Call-back
1755  * @data: pointer to adapter cast into an unsigned long
1756  **/
1757 static void
1758 e1000_watchdog(unsigned long data)
1759 {
1760         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
1761
1762         /* Do the rest outside of interrupt context */
1763         schedule_work(&adapter->watchdog_task);
1764 }
1765
1766 static void
1767 e1000_watchdog_task(struct e1000_adapter *adapter)
1768 {
1769         struct net_device *netdev = adapter->netdev;
1770         struct e1000_desc_ring *txdr = &adapter->tx_ring;
1771         uint32_t link;
1772
1773         e1000_check_for_link(&adapter->hw);
1774         if (adapter->hw.mac_type == e1000_82573) {
1775                 e1000_enable_tx_pkt_filtering(&adapter->hw);
1776                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
1777                         e1000_update_mng_vlan(adapter);
1778         }
1779
1780         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
1781            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
1782                 link = !adapter->hw.serdes_link_down;
1783         else
1784                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
1785
1786         if(link) {
1787                 if(!netif_carrier_ok(netdev)) {
1788                         e1000_get_speed_and_duplex(&adapter->hw,
1789                                                    &adapter->link_speed,
1790                                                    &adapter->link_duplex);
1791
1792                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
1793                                adapter->link_speed,
1794                                adapter->link_duplex == FULL_DUPLEX ?
1795                                "Full Duplex" : "Half Duplex");
1796
1797                         netif_carrier_on(netdev);
1798                         netif_wake_queue(netdev);
1799                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1800                         adapter->smartspeed = 0;
1801                 }
1802         } else {
1803                 if(netif_carrier_ok(netdev)) {
1804                         adapter->link_speed = 0;
1805                         adapter->link_duplex = 0;
1806                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
1807                         netif_carrier_off(netdev);
1808                         netif_stop_queue(netdev);
1809                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
1810                 }
1811
1812                 e1000_smartspeed(adapter);
1813         }
1814
1815         e1000_update_stats(adapter);
1816
1817         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
1818         adapter->tpt_old = adapter->stats.tpt;
1819         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
1820         adapter->colc_old = adapter->stats.colc;
1821
1822         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
1823         adapter->gorcl_old = adapter->stats.gorcl;
1824         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
1825         adapter->gotcl_old = adapter->stats.gotcl;
1826
1827         e1000_update_adaptive(&adapter->hw);
1828
1829         if(!netif_carrier_ok(netdev)) {
1830                 if(E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
1831                         /* We've lost link, so the controller stops DMA,
1832                          * but we've got queued Tx work that's never going
1833                          * to get done, so reset controller to flush Tx.
1834                          * (Do the reset outside of interrupt context). */
1835                         schedule_work(&adapter->tx_timeout_task);
1836                 }
1837         }
1838
1839         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
1840         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
1841                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
1842                  * asymmetrical Tx or Rx gets ITR=8000; everyone
1843                  * else is between 2000-8000. */
1844                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
1845                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
1846                         adapter->gotcl - adapter->gorcl :
1847                         adapter->gorcl - adapter->gotcl) / 10000;
1848                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
1849                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
1850         }
1851
1852         /* Cause software interrupt to ensure rx ring is cleaned */
1853         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
1854
1855         /* Force detection of hung controller every watchdog period */
1856         adapter->detect_tx_hung = TRUE;
1857
1858         /* Reset the timer */
1859         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
1860 }
1861
1862 #define E1000_TX_FLAGS_CSUM             0x00000001
1863 #define E1000_TX_FLAGS_VLAN             0x00000002
1864 #define E1000_TX_FLAGS_TSO              0x00000004
1865 #define E1000_TX_FLAGS_IPV4             0x00000008
1866 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
1867 #define E1000_TX_FLAGS_VLAN_SHIFT       16
1868
1869 static inline int
1870 e1000_tso(struct e1000_adapter *adapter, struct sk_buff *skb)
1871 {
1872 #ifdef NETIF_F_TSO
1873         struct e1000_context_desc *context_desc;
1874         unsigned int i;
1875         uint32_t cmd_length = 0;
1876         uint16_t ipcse = 0, tucse, mss;
1877         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
1878         int err;
1879
1880         if(skb_shinfo(skb)->tso_size) {
1881                 if (skb_header_cloned(skb)) {
1882                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1883                         if (err)
1884                                 return err;
1885                 }
1886
1887                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
1888                 mss = skb_shinfo(skb)->tso_size;
1889                 if(skb->protocol == ntohs(ETH_P_IP)) {
1890                         skb->nh.iph->tot_len = 0;
1891                         skb->nh.iph->check = 0;
1892                         skb->h.th->check =
1893                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
1894                                                    skb->nh.iph->daddr,
1895                                                    0,
1896                                                    IPPROTO_TCP,
1897                                                    0);
1898                         cmd_length = E1000_TXD_CMD_IP;
1899                         ipcse = skb->h.raw - skb->data - 1;
1900 #ifdef NETIF_F_TSO_IPV6
1901                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
1902                         skb->nh.ipv6h->payload_len = 0;
1903                         skb->h.th->check =
1904                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
1905                                                  &skb->nh.ipv6h->daddr,
1906                                                  0,
1907                                                  IPPROTO_TCP,
1908                                                  0);
1909                         ipcse = 0;
1910 #endif
1911                 }
1912                 ipcss = skb->nh.raw - skb->data;
1913                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
1914                 tucss = skb->h.raw - skb->data;
1915                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
1916                 tucse = 0;
1917
1918                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
1919                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
1920
1921                 i = adapter->tx_ring.next_to_use;
1922                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1923
1924                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
1925                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
1926                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
1927                 context_desc->upper_setup.tcp_fields.tucss = tucss;
1928                 context_desc->upper_setup.tcp_fields.tucso = tucso;
1929                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
1930                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
1931                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
1932                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
1933
1934                 if(++i == adapter->tx_ring.count) i = 0;
1935                 adapter->tx_ring.next_to_use = i;
1936
1937                 return 1;
1938         }
1939 #endif
1940
1941         return 0;
1942 }
1943
1944 static inline boolean_t
1945 e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
1946 {
1947         struct e1000_context_desc *context_desc;
1948         unsigned int i;
1949         uint8_t css;
1950
1951         if(likely(skb->ip_summed == CHECKSUM_HW)) {
1952                 css = skb->h.raw - skb->data;
1953
1954                 i = adapter->tx_ring.next_to_use;
1955                 context_desc = E1000_CONTEXT_DESC(adapter->tx_ring, i);
1956
1957                 context_desc->upper_setup.tcp_fields.tucss = css;
1958                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
1959                 context_desc->upper_setup.tcp_fields.tucse = 0;
1960                 context_desc->tcp_seg_setup.data = 0;
1961                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
1962
1963                 if(unlikely(++i == adapter->tx_ring.count)) i = 0;
1964                 adapter->tx_ring.next_to_use = i;
1965
1966                 return TRUE;
1967         }
1968
1969         return FALSE;
1970 }
1971
1972 #define E1000_MAX_TXD_PWR       12
1973 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
1974
1975 static inline int
1976 e1000_tx_map(struct e1000_adapter *adapter, struct sk_buff *skb,
1977         unsigned int first, unsigned int max_per_txd,
1978         unsigned int nr_frags, unsigned int mss)
1979 {
1980         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
1981         struct e1000_buffer *buffer_info;
1982         unsigned int len = skb->len;
1983         unsigned int offset = 0, size, count = 0, i;
1984         unsigned int f;
1985         len -= skb->data_len;
1986
1987         i = tx_ring->next_to_use;
1988
1989         while(len) {
1990                 buffer_info = &tx_ring->buffer_info[i];
1991                 size = min(len, max_per_txd);
1992 #ifdef NETIF_F_TSO
1993                 /* Workaround for premature desc write-backs
1994                  * in TSO mode.  Append 4-byte sentinel desc */
1995                 if(unlikely(mss && !nr_frags && size == len && size > 8))
1996                         size -= 4;
1997 #endif
1998                 /* work-around for errata 10 and it applies
1999                  * to all controllers in PCI-X mode
2000                  * The fix is to make sure that the first descriptor of a
2001                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2002                  */
2003                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2004                                 (size > 2015) && count == 0))
2005                         size = 2015;
2006
2007                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2008                  * terminating buffers within evenly-aligned dwords. */
2009                 if(unlikely(adapter->pcix_82544 &&
2010                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2011                    size > 4))
2012                         size -= 4;
2013
2014                 buffer_info->length = size;
2015                 buffer_info->dma =
2016                         pci_map_single(adapter->pdev,
2017                                 skb->data + offset,
2018                                 size,
2019                                 PCI_DMA_TODEVICE);
2020                 buffer_info->time_stamp = jiffies;
2021
2022                 len -= size;
2023                 offset += size;
2024                 count++;
2025                 if(unlikely(++i == tx_ring->count)) i = 0;
2026         }
2027
2028         for(f = 0; f < nr_frags; f++) {
2029                 struct skb_frag_struct *frag;
2030
2031                 frag = &skb_shinfo(skb)->frags[f];
2032                 len = frag->size;
2033                 offset = frag->page_offset;
2034
2035                 while(len) {
2036                         buffer_info = &tx_ring->buffer_info[i];
2037                         size = min(len, max_per_txd);
2038 #ifdef NETIF_F_TSO
2039                         /* Workaround for premature desc write-backs
2040                          * in TSO mode.  Append 4-byte sentinel desc */
2041                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2042                                 size -= 4;
2043 #endif
2044                         /* Workaround for potential 82544 hang in PCI-X.
2045                          * Avoid terminating buffers within evenly-aligned
2046                          * dwords. */
2047                         if(unlikely(adapter->pcix_82544 &&
2048                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2049                            size > 4))
2050                                 size -= 4;
2051
2052                         buffer_info->length = size;
2053                         buffer_info->dma =
2054                                 pci_map_page(adapter->pdev,
2055                                         frag->page,
2056                                         offset,
2057                                         size,
2058                                         PCI_DMA_TODEVICE);
2059                         buffer_info->time_stamp = jiffies;
2060
2061                         len -= size;
2062                         offset += size;
2063                         count++;
2064                         if(unlikely(++i == tx_ring->count)) i = 0;
2065                 }
2066         }
2067
2068         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2069         tx_ring->buffer_info[i].skb = skb;
2070         tx_ring->buffer_info[first].next_to_watch = i;
2071
2072         return count;
2073 }
2074
2075 static inline void
2076 e1000_tx_queue(struct e1000_adapter *adapter, int count, int tx_flags)
2077 {
2078         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
2079         struct e1000_tx_desc *tx_desc = NULL;
2080         struct e1000_buffer *buffer_info;
2081         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2082         unsigned int i;
2083
2084         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2085                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2086                              E1000_TXD_CMD_TSE;
2087                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2088
2089                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2090                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2091         }
2092
2093         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2094                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2095                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2096         }
2097
2098         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2099                 txd_lower |= E1000_TXD_CMD_VLE;
2100                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2101         }
2102
2103         i = tx_ring->next_to_use;
2104
2105         while(count--) {
2106                 buffer_info = &tx_ring->buffer_info[i];
2107                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2108                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2109                 tx_desc->lower.data =
2110                         cpu_to_le32(txd_lower | buffer_info->length);
2111                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2112                 if(unlikely(++i == tx_ring->count)) i = 0;
2113         }
2114
2115         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2116
2117         /* Force memory writes to complete before letting h/w
2118          * know there are new descriptors to fetch.  (Only
2119          * applicable for weak-ordered memory model archs,
2120          * such as IA-64). */
2121         wmb();
2122
2123         tx_ring->next_to_use = i;
2124         E1000_WRITE_REG(&adapter->hw, TDT, i);
2125 }
2126
2127 /**
2128  * 82547 workaround to avoid controller hang in half-duplex environment.
2129  * The workaround is to avoid queuing a large packet that would span
2130  * the internal Tx FIFO ring boundary by notifying the stack to resend
2131  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2132  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2133  * to the beginning of the Tx FIFO.
2134  **/
2135
2136 #define E1000_FIFO_HDR                  0x10
2137 #define E1000_82547_PAD_LEN             0x3E0
2138
2139 static inline int
2140 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2141 {
2142         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2143         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2144
2145         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2146
2147         if(adapter->link_duplex != HALF_DUPLEX)
2148                 goto no_fifo_stall_required;
2149
2150         if(atomic_read(&adapter->tx_fifo_stall))
2151                 return 1;
2152
2153         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2154                 atomic_set(&adapter->tx_fifo_stall, 1);
2155                 return 1;
2156         }
2157
2158 no_fifo_stall_required:
2159         adapter->tx_fifo_head += skb_fifo_len;
2160         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2161                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2162         return 0;
2163 }
2164
2165 #define MINIMUM_DHCP_PACKET_SIZE 282
2166 static inline int
2167 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2168 {
2169         struct e1000_hw *hw =  &adapter->hw;
2170         uint16_t length, offset;
2171         if(vlan_tx_tag_present(skb)) {
2172                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2173                         ( adapter->hw.mng_cookie.status &
2174                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2175                         return 0;
2176         }
2177         if(htons(ETH_P_IP) == skb->protocol) {
2178                 const struct iphdr *ip = skb->nh.iph;
2179                 if(IPPROTO_UDP == ip->protocol) {
2180                         struct udphdr *udp = (struct udphdr *)(skb->h.uh);
2181                         if(ntohs(udp->dest) == 67) {
2182                                 offset = (uint8_t *)udp + 8 - skb->data;
2183                                 length = skb->len - offset;
2184
2185                                 return e1000_mng_write_dhcp_info(hw,
2186                                                 (uint8_t *)udp + 8, length);
2187                         }
2188                 }
2189         } else if((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2190                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2191                 if((htons(ETH_P_IP) == eth->h_proto)) {
2192                         const struct iphdr *ip =
2193                                 (struct iphdr *)((uint8_t *)skb->data+14);
2194                         if(IPPROTO_UDP == ip->protocol) {
2195                                 struct udphdr *udp =
2196                                         (struct udphdr *)((uint8_t *)ip +
2197                                                 (ip->ihl << 2));
2198                                 if(ntohs(udp->dest) == 67) {
2199                                         offset = (uint8_t *)udp + 8 - skb->data;
2200                                         length = skb->len - offset;
2201
2202                                         return e1000_mng_write_dhcp_info(hw,
2203                                                         (uint8_t *)udp + 8,
2204                                                         length);
2205                                 }
2206                         }
2207                 }
2208         }
2209         return 0;
2210 }
2211
2212 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2213 static int
2214 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2215 {
2216         struct e1000_adapter *adapter = netdev->priv;
2217         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2218         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2219         unsigned int tx_flags = 0;
2220         unsigned int len = skb->len;
2221         unsigned long flags;
2222         unsigned int nr_frags = 0;
2223         unsigned int mss = 0;
2224         int count = 0;
2225         int tso;
2226         unsigned int f;
2227         len -= skb->data_len;
2228
2229         if(unlikely(skb->len <= 0)) {
2230                 dev_kfree_skb_any(skb);
2231                 return NETDEV_TX_OK;
2232         }
2233
2234 #ifdef NETIF_F_TSO
2235         mss = skb_shinfo(skb)->tso_size;
2236         /* The controller does a simple calculation to
2237          * make sure there is enough room in the FIFO before
2238          * initiating the DMA for each buffer.  The calc is:
2239          * 4 = ceil(buffer len/mss).  To make sure we don't
2240          * overrun the FIFO, adjust the max buffer len if mss
2241          * drops. */
2242         if(mss) {
2243                 max_per_txd = min(mss << 2, max_per_txd);
2244                 max_txd_pwr = fls(max_per_txd) - 1;
2245         }
2246
2247         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2248                 count++;
2249         count++;
2250 #else
2251         if(skb->ip_summed == CHECKSUM_HW)
2252                 count++;
2253 #endif
2254         count += TXD_USE_COUNT(len, max_txd_pwr);
2255
2256         if(adapter->pcix_82544)
2257                 count++;
2258
2259         /* work-around for errata 10 and it applies to all controllers
2260          * in PCI-X mode, so add one more descriptor to the count
2261          */
2262         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2263                         (len > 2015)))
2264                 count++;
2265
2266         nr_frags = skb_shinfo(skb)->nr_frags;
2267         for(f = 0; f < nr_frags; f++)
2268                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2269                                        max_txd_pwr);
2270         if(adapter->pcix_82544)
2271                 count += nr_frags;
2272
2273         local_irq_save(flags);
2274         if (!spin_trylock(&adapter->tx_lock)) {
2275                 /* Collision - tell upper layer to requeue */
2276                 local_irq_restore(flags);
2277                 return NETDEV_TX_LOCKED;
2278         }
2279         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2280                 e1000_transfer_dhcp_info(adapter, skb);
2281
2282
2283         /* need: count + 2 desc gap to keep tail from touching
2284          * head, otherwise try next time */
2285         if(unlikely(E1000_DESC_UNUSED(&adapter->tx_ring) < count + 2)) {
2286                 netif_stop_queue(netdev);
2287                 spin_unlock_irqrestore(&adapter->tx_lock, flags);
2288                 return NETDEV_TX_BUSY;
2289         }
2290
2291         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2292                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2293                         netif_stop_queue(netdev);
2294                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2295                         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2296                         return NETDEV_TX_BUSY;
2297                 }
2298         }
2299
2300         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2301                 tx_flags |= E1000_TX_FLAGS_VLAN;
2302                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2303         }
2304
2305         first = adapter->tx_ring.next_to_use;
2306
2307         tso = e1000_tso(adapter, skb);
2308         if (tso < 0) {
2309                 dev_kfree_skb_any(skb);
2310                 return NETDEV_TX_OK;
2311         }
2312
2313         if (likely(tso))
2314                 tx_flags |= E1000_TX_FLAGS_TSO;
2315         else if(likely(e1000_tx_csum(adapter, skb)))
2316                 tx_flags |= E1000_TX_FLAGS_CSUM;
2317
2318         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2319          * 82573 hardware supports TSO capabilities for IPv6 as well...
2320          * no longer assume, we must. */
2321         if(likely(skb->protocol == ntohs(ETH_P_IP)))
2322                 tx_flags |= E1000_TX_FLAGS_IPV4;
2323
2324         e1000_tx_queue(adapter,
2325                 e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss),
2326                 tx_flags);
2327
2328         netdev->trans_start = jiffies;
2329
2330         /* Make sure there is space in the ring for the next send. */
2331         if(unlikely(E1000_DESC_UNUSED(&adapter->tx_ring) < MAX_SKB_FRAGS + 2))
2332                 netif_stop_queue(netdev);
2333
2334         spin_unlock_irqrestore(&adapter->tx_lock, flags);
2335         return NETDEV_TX_OK;
2336 }
2337
2338 /**
2339  * e1000_tx_timeout - Respond to a Tx Hang
2340  * @netdev: network interface device structure
2341  **/
2342
2343 static void
2344 e1000_tx_timeout(struct net_device *netdev)
2345 {
2346         struct e1000_adapter *adapter = netdev->priv;
2347
2348         /* Do the reset outside of interrupt context */
2349         schedule_work(&adapter->tx_timeout_task);
2350 }
2351
2352 static void
2353 e1000_tx_timeout_task(struct net_device *netdev)
2354 {
2355         struct e1000_adapter *adapter = netdev->priv;
2356
2357         e1000_down(adapter);
2358         e1000_up(adapter);
2359 }
2360
2361 /**
2362  * e1000_get_stats - Get System Network Statistics
2363  * @netdev: network interface device structure
2364  *
2365  * Returns the address of the device statistics structure.
2366  * The statistics are actually updated from the timer callback.
2367  **/
2368
2369 static struct net_device_stats *
2370 e1000_get_stats(struct net_device *netdev)
2371 {
2372         struct e1000_adapter *adapter = netdev->priv;
2373
2374         e1000_update_stats(adapter);
2375         return &adapter->net_stats;
2376 }
2377
2378 /**
2379  * e1000_change_mtu - Change the Maximum Transfer Unit
2380  * @netdev: network interface device structure
2381  * @new_mtu: new value for maximum frame size
2382  *
2383  * Returns 0 on success, negative on failure
2384  **/
2385
2386 static int
2387 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2388 {
2389         struct e1000_adapter *adapter = netdev->priv;
2390         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2391
2392         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2393                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2394                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2395                         return -EINVAL;
2396         }
2397
2398 #define MAX_STD_JUMBO_FRAME_SIZE 9216
2399         /* might want this to be bigger enum check... */
2400         if (adapter->hw.mac_type == e1000_82573 &&
2401             max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2402                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2403                                     "on 82573\n");
2404                 return -EINVAL;
2405         }
2406
2407         if(adapter->hw.mac_type > e1000_82547_rev_2) {
2408                 adapter->rx_buffer_len = max_frame;
2409                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
2410         } else {
2411                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
2412                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
2413                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2414                                             "on 82542\n");
2415                         return -EINVAL;
2416
2417                 } else {
2418                         if(max_frame <= E1000_RXBUFFER_2048) {
2419                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2420                         } else if(max_frame <= E1000_RXBUFFER_4096) {
2421                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2422                         } else if(max_frame <= E1000_RXBUFFER_8192) {
2423                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2424                         } else if(max_frame <= E1000_RXBUFFER_16384) {
2425                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2426                         }
2427                 }
2428         }
2429
2430         netdev->mtu = new_mtu;
2431
2432         if(netif_running(netdev)) {
2433                 e1000_down(adapter);
2434                 e1000_up(adapter);
2435         }
2436
2437         adapter->hw.max_frame_size = max_frame;
2438
2439         return 0;
2440 }
2441
2442 /**
2443  * e1000_update_stats - Update the board statistics counters
2444  * @adapter: board private structure
2445  **/
2446
2447 void
2448 e1000_update_stats(struct e1000_adapter *adapter)
2449 {
2450         struct e1000_hw *hw = &adapter->hw;
2451         unsigned long flags;
2452         uint16_t phy_tmp;
2453
2454 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2455
2456         spin_lock_irqsave(&adapter->stats_lock, flags);
2457
2458         /* these counters are modified from e1000_adjust_tbi_stats,
2459          * called from the interrupt context, so they must only
2460          * be written while holding adapter->stats_lock
2461          */
2462
2463         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2464         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2465         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2466         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2467         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2468         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2469         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2470         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2471         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2472         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2473         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2474         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2475         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2476
2477         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2478         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2479         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2480         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2481         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2482         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2483         adapter->stats.dc += E1000_READ_REG(hw, DC);
2484         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2485         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2486         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2487         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2488         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2489         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2490         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2491         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2492         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2493         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2494         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2495         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2496         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2497         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2498         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2499         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2500         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2501         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2502         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2503         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2504         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2505         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2506         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2507         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2508         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2509         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2510         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2511
2512         /* used for adaptive IFS */
2513
2514         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
2515         adapter->stats.tpt += hw->tx_packet_delta;
2516         hw->collision_delta = E1000_READ_REG(hw, COLC);
2517         adapter->stats.colc += hw->collision_delta;
2518
2519         if(hw->mac_type >= e1000_82543) {
2520                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
2521                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
2522                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
2523                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
2524                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
2525                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
2526         }
2527         if(hw->mac_type > e1000_82547_rev_2) {
2528                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
2529                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
2530                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
2531                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
2532                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
2533                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
2534                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
2535                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
2536                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
2537         }
2538
2539         /* Fill out the OS statistics structure */
2540
2541         adapter->net_stats.rx_packets = adapter->stats.gprc;
2542         adapter->net_stats.tx_packets = adapter->stats.gptc;
2543         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
2544         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
2545         adapter->net_stats.multicast = adapter->stats.mprc;
2546         adapter->net_stats.collisions = adapter->stats.colc;
2547
2548         /* Rx Errors */
2549
2550         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
2551                 adapter->stats.crcerrs + adapter->stats.algnerrc +
2552                 adapter->stats.rlec + adapter->stats.mpc +
2553                 adapter->stats.cexterr;
2554         adapter->net_stats.rx_dropped = adapter->stats.mpc;
2555         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2556         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2557         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
2558         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
2559         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
2560
2561         /* Tx Errors */
2562
2563         adapter->net_stats.tx_errors = adapter->stats.ecol +
2564                                        adapter->stats.latecol;
2565         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
2566         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
2567         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
2568
2569         /* Tx Dropped needs to be maintained elsewhere */
2570
2571         /* Phy Stats */
2572
2573         if(hw->media_type == e1000_media_type_copper) {
2574                 if((adapter->link_speed == SPEED_1000) &&
2575                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
2576                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
2577                         adapter->phy_stats.idle_errors += phy_tmp;
2578                 }
2579
2580                 if((hw->mac_type <= e1000_82546) &&
2581                    (hw->phy_type == e1000_phy_m88) &&
2582                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
2583                         adapter->phy_stats.receive_errors += phy_tmp;
2584         }
2585
2586         spin_unlock_irqrestore(&adapter->stats_lock, flags);
2587 }
2588
2589 /**
2590  * e1000_intr - Interrupt Handler
2591  * @irq: interrupt number
2592  * @data: pointer to a network interface device structure
2593  * @pt_regs: CPU registers structure
2594  **/
2595
2596 static irqreturn_t
2597 e1000_intr(int irq, void *data, struct pt_regs *regs)
2598 {
2599         struct net_device *netdev = data;
2600         struct e1000_adapter *adapter = netdev->priv;
2601         struct e1000_hw *hw = &adapter->hw;
2602         uint32_t icr = E1000_READ_REG(hw, ICR);
2603 #ifndef CONFIG_E1000_NAPI
2604         unsigned int i;
2605 #endif
2606
2607         if(unlikely(!icr))
2608                 return IRQ_NONE;  /* Not our interrupt */
2609
2610         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
2611                 hw->get_link_status = 1;
2612                 mod_timer(&adapter->watchdog_timer, jiffies);
2613         }
2614
2615 #ifdef CONFIG_E1000_NAPI
2616         if(likely(netif_rx_schedule_prep(netdev))) {
2617
2618                 /* Disable interrupts and register for poll. The flush
2619                   of the posted write is intentionally left out.
2620                 */
2621
2622                 atomic_inc(&adapter->irq_sem);
2623                 E1000_WRITE_REG(hw, IMC, ~0);
2624                 __netif_rx_schedule(netdev);
2625         }
2626 #else
2627         /* Writing IMC and IMS is needed for 82547.
2628            Due to Hub Link bus being occupied, an interrupt
2629            de-assertion message is not able to be sent.
2630            When an interrupt assertion message is generated later,
2631            two messages are re-ordered and sent out.
2632            That causes APIC to think 82547 is in de-assertion
2633            state, while 82547 is in assertion state, resulting
2634            in dead lock. Writing IMC forces 82547 into
2635            de-assertion state.
2636         */
2637         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
2638                 atomic_inc(&adapter->irq_sem);
2639                 E1000_WRITE_REG(hw, IMC, ~0);
2640         }
2641
2642         for(i = 0; i < E1000_MAX_INTR; i++)
2643                 if(unlikely(!adapter->clean_rx(adapter) &
2644                    !e1000_clean_tx_irq(adapter)))
2645                         break;
2646
2647         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
2648                 e1000_irq_enable(adapter);
2649 #endif
2650
2651         return IRQ_HANDLED;
2652 }
2653
2654 #ifdef CONFIG_E1000_NAPI
2655 /**
2656  * e1000_clean - NAPI Rx polling callback
2657  * @adapter: board private structure
2658  **/
2659
2660 static int
2661 e1000_clean(struct net_device *netdev, int *budget)
2662 {
2663         struct e1000_adapter *adapter = netdev->priv;
2664         int work_to_do = min(*budget, netdev->quota);
2665         int tx_cleaned;
2666         int work_done = 0;
2667
2668         tx_cleaned = e1000_clean_tx_irq(adapter);
2669         adapter->clean_rx(adapter, &work_done, work_to_do);
2670
2671         *budget -= work_done;
2672         netdev->quota -= work_done;
2673
2674         /* If no Tx and no Rx work done, exit the polling mode */
2675         if ((!tx_cleaned && (work_done == 0)) || !netif_running(netdev)) {
2676                 netif_rx_complete(netdev);
2677                 e1000_irq_enable(adapter);
2678                 return 0;
2679         }
2680
2681         return 1;
2682 }
2683
2684 #endif
2685 /**
2686  * e1000_clean_tx_irq - Reclaim resources after transmit completes
2687  * @adapter: board private structure
2688  **/
2689
2690 static boolean_t
2691 e1000_clean_tx_irq(struct e1000_adapter *adapter)
2692 {
2693         struct e1000_desc_ring *tx_ring = &adapter->tx_ring;
2694         struct net_device *netdev = adapter->netdev;
2695         struct e1000_tx_desc *tx_desc, *eop_desc;
2696         struct e1000_buffer *buffer_info;
2697         unsigned int i, eop;
2698         boolean_t cleaned = FALSE;
2699
2700         i = tx_ring->next_to_clean;
2701         eop = tx_ring->buffer_info[i].next_to_watch;
2702         eop_desc = E1000_TX_DESC(*tx_ring, eop);
2703
2704         while(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
2705                 /* Premature writeback of Tx descriptors clear (free buffers
2706                  * and unmap pci_mapping) previous_buffer_info */
2707                 if (likely(adapter->previous_buffer_info.skb != NULL)) {
2708                         e1000_unmap_and_free_tx_resource(adapter,
2709                                         &adapter->previous_buffer_info);
2710                 }
2711
2712                 for(cleaned = FALSE; !cleaned; ) {
2713                         tx_desc = E1000_TX_DESC(*tx_ring, i);
2714                         buffer_info = &tx_ring->buffer_info[i];
2715                         cleaned = (i == eop);
2716
2717 #ifdef NETIF_F_TSO
2718                         if (!(netdev->features & NETIF_F_TSO)) {
2719 #endif
2720                                 e1000_unmap_and_free_tx_resource(adapter,
2721                                                                  buffer_info);
2722 #ifdef NETIF_F_TSO
2723                         } else {
2724                                 if (cleaned) {
2725                                         memcpy(&adapter->previous_buffer_info,
2726                                                buffer_info,
2727                                                sizeof(struct e1000_buffer));
2728                                         memset(buffer_info, 0,
2729                                                sizeof(struct e1000_buffer));
2730                                 } else {
2731                                         e1000_unmap_and_free_tx_resource(
2732                                             adapter, buffer_info);
2733                                 }
2734                         }
2735 #endif
2736
2737                         tx_desc->buffer_addr = 0;
2738                         tx_desc->lower.data = 0;
2739                         tx_desc->upper.data = 0;
2740
2741                         if(unlikely(++i == tx_ring->count)) i = 0;
2742                 }
2743
2744                 eop = tx_ring->buffer_info[i].next_to_watch;
2745                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
2746         }
2747
2748         tx_ring->next_to_clean = i;
2749
2750         spin_lock(&adapter->tx_lock);
2751
2752         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
2753                     netif_carrier_ok(netdev)))
2754                 netif_wake_queue(netdev);
2755
2756         spin_unlock(&adapter->tx_lock);
2757         if(adapter->detect_tx_hung) {
2758
2759                 /* Detect a transmit hang in hardware, this serializes the
2760                  * check with the clearing of time_stamp and movement of i */
2761                 adapter->detect_tx_hung = FALSE;
2762                 if (tx_ring->buffer_info[i].dma &&
2763                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
2764                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
2765                         E1000_STATUS_TXOFF)) {
2766
2767                         /* detected Tx unit hang */
2768                         i = tx_ring->next_to_clean;
2769                         eop = tx_ring->buffer_info[i].next_to_watch;
2770                         eop_desc = E1000_TX_DESC(*tx_ring, eop);
2771                         DPRINTK(TX_ERR, ERR, "Detected Tx Unit Hang\n"
2772                                         "  TDH                  <%x>\n"
2773                                         "  TDT                  <%x>\n"
2774                                         "  next_to_use          <%x>\n"
2775                                         "  next_to_clean        <%x>\n"
2776                                         "buffer_info[next_to_clean]\n"
2777                                         "  dma                  <%llx>\n"
2778                                         "  time_stamp           <%lx>\n"
2779                                         "  next_to_watch        <%x>\n"
2780                                         "  jiffies              <%lx>\n"
2781                                         "  next_to_watch.status <%x>\n",
2782                                 E1000_READ_REG(&adapter->hw, TDH),
2783                                 E1000_READ_REG(&adapter->hw, TDT),
2784                                 tx_ring->next_to_use,
2785                                 i,
2786                                 tx_ring->buffer_info[i].dma,
2787                                 tx_ring->buffer_info[i].time_stamp,
2788                                 eop,
2789                                 jiffies,
2790                                 eop_desc->upper.fields.status);
2791                         netif_stop_queue(netdev);
2792                 }
2793         }
2794 #ifdef NETIF_F_TSO
2795
2796         if( unlikely(!(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
2797             time_after(jiffies, adapter->previous_buffer_info.time_stamp + HZ)))
2798                 e1000_unmap_and_free_tx_resource(
2799                     adapter, &adapter->previous_buffer_info);
2800
2801 #endif
2802         return cleaned;
2803 }
2804
2805 /**
2806  * e1000_rx_checksum - Receive Checksum Offload for 82543
2807  * @adapter:     board private structure
2808  * @status_err:  receive descriptor status and error fields
2809  * @csum:        receive descriptor csum field
2810  * @sk_buff:     socket buffer with received data
2811  **/
2812
2813 static inline void
2814 e1000_rx_checksum(struct e1000_adapter *adapter,
2815                   uint32_t status_err, uint32_t csum,
2816                   struct sk_buff *skb)
2817 {
2818         uint16_t status = (uint16_t)status_err;
2819         uint8_t errors = (uint8_t)(status_err >> 24);
2820         skb->ip_summed = CHECKSUM_NONE;
2821
2822         /* 82543 or newer only */
2823         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
2824         /* Ignore Checksum bit is set */
2825         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
2826         /* TCP/UDP checksum error bit is set */
2827         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
2828                 /* let the stack verify checksum errors */
2829                 adapter->hw_csum_err++;
2830                 return;
2831         }
2832         /* TCP/UDP Checksum has not been calculated */
2833         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
2834                 if(!(status & E1000_RXD_STAT_TCPCS))
2835                         return;
2836         } else {
2837                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
2838                         return;
2839         }
2840         /* It must be a TCP or UDP packet with a valid checksum */
2841         if (likely(status & E1000_RXD_STAT_TCPCS)) {
2842                 /* TCP checksum is good */
2843                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2844         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
2845                 /* IP fragment with UDP payload */
2846                 /* Hardware complements the payload checksum, so we undo it
2847                  * and then put the value in host order for further stack use.
2848                  */
2849                 csum = ntohl(csum ^ 0xFFFF);
2850                 skb->csum = csum;
2851                 skb->ip_summed = CHECKSUM_HW;
2852         }
2853         adapter->hw_csum_good++;
2854 }
2855
2856 /**
2857  * e1000_clean_rx_irq - Send received data up the network stack; legacy
2858  * @adapter: board private structure
2859  **/
2860
2861 static boolean_t
2862 #ifdef CONFIG_E1000_NAPI
2863 e1000_clean_rx_irq(struct e1000_adapter *adapter, int *work_done,
2864                    int work_to_do)
2865 #else
2866 e1000_clean_rx_irq(struct e1000_adapter *adapter)
2867 #endif
2868 {
2869         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2870         struct net_device *netdev = adapter->netdev;
2871         struct pci_dev *pdev = adapter->pdev;
2872         struct e1000_rx_desc *rx_desc;
2873         struct e1000_buffer *buffer_info;
2874         struct sk_buff *skb;
2875         unsigned long flags;
2876         uint32_t length;
2877         uint8_t last_byte;
2878         unsigned int i;
2879         boolean_t cleaned = FALSE;
2880
2881         i = rx_ring->next_to_clean;
2882         rx_desc = E1000_RX_DESC(*rx_ring, i);
2883
2884         while(rx_desc->status & E1000_RXD_STAT_DD) {
2885                 buffer_info = &rx_ring->buffer_info[i];
2886 #ifdef CONFIG_E1000_NAPI
2887                 if(*work_done >= work_to_do)
2888                         break;
2889                 (*work_done)++;
2890 #endif
2891                 cleaned = TRUE;
2892
2893                 pci_unmap_single(pdev,
2894                                  buffer_info->dma,
2895                                  buffer_info->length,
2896                                  PCI_DMA_FROMDEVICE);
2897
2898                 skb = buffer_info->skb;
2899                 length = le16_to_cpu(rx_desc->length);
2900
2901                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
2902                         /* All receives must fit into a single buffer */
2903                         E1000_DBG("%s: Receive packet consumed multiple"
2904                                   " buffers\n", netdev->name);
2905                         dev_kfree_skb_irq(skb);
2906                         goto next_desc;
2907                 }
2908
2909                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
2910                         last_byte = *(skb->data + length - 1);
2911                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
2912                                       rx_desc->errors, length, last_byte)) {
2913                                 spin_lock_irqsave(&adapter->stats_lock, flags);
2914                                 e1000_tbi_adjust_stats(&adapter->hw,
2915                                                        &adapter->stats,
2916                                                        length, skb->data);
2917                                 spin_unlock_irqrestore(&adapter->stats_lock,
2918                                                        flags);
2919                                 length--;
2920                         } else {
2921                                 dev_kfree_skb_irq(skb);
2922                                 goto next_desc;
2923                         }
2924                 }
2925
2926                 /* Good Receive */
2927                 skb_put(skb, length - ETHERNET_FCS_SIZE);
2928
2929                 /* Receive Checksum Offload */
2930                 e1000_rx_checksum(adapter,
2931                                   (uint32_t)(rx_desc->status) |
2932                                   ((uint32_t)(rx_desc->errors) << 24),
2933                                   rx_desc->csum, skb);
2934                 skb->protocol = eth_type_trans(skb, netdev);
2935 #ifdef CONFIG_E1000_NAPI
2936                 if(unlikely(adapter->vlgrp &&
2937                             (rx_desc->status & E1000_RXD_STAT_VP))) {
2938                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
2939                                                  le16_to_cpu(rx_desc->special) &
2940                                                  E1000_RXD_SPC_VLAN_MASK);
2941                 } else {
2942                         netif_receive_skb(skb);
2943                 }
2944 #else /* CONFIG_E1000_NAPI */
2945                 if(unlikely(adapter->vlgrp &&
2946                             (rx_desc->status & E1000_RXD_STAT_VP))) {
2947                         vlan_hwaccel_rx(skb, adapter->vlgrp,
2948                                         le16_to_cpu(rx_desc->special) &
2949                                         E1000_RXD_SPC_VLAN_MASK);
2950                 } else {
2951                         netif_rx(skb);
2952                 }
2953 #endif /* CONFIG_E1000_NAPI */
2954                 netdev->last_rx = jiffies;
2955
2956 next_desc:
2957                 rx_desc->status = 0;
2958                 buffer_info->skb = NULL;
2959                 if(unlikely(++i == rx_ring->count)) i = 0;
2960
2961                 rx_desc = E1000_RX_DESC(*rx_ring, i);
2962         }
2963         rx_ring->next_to_clean = i;
2964         adapter->alloc_rx_buf(adapter);
2965
2966         return cleaned;
2967 }
2968
2969 /**
2970  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
2971  * @adapter: board private structure
2972  **/
2973
2974 static boolean_t
2975 #ifdef CONFIG_E1000_NAPI
2976 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, int *work_done,
2977                       int work_to_do)
2978 #else
2979 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter)
2980 #endif
2981 {
2982         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
2983         union e1000_rx_desc_packet_split *rx_desc;
2984         struct net_device *netdev = adapter->netdev;
2985         struct pci_dev *pdev = adapter->pdev;
2986         struct e1000_buffer *buffer_info;
2987         struct e1000_ps_page *ps_page;
2988         struct e1000_ps_page_dma *ps_page_dma;
2989         struct sk_buff *skb;
2990         unsigned int i, j;
2991         uint32_t length, staterr;
2992         boolean_t cleaned = FALSE;
2993
2994         i = rx_ring->next_to_clean;
2995         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
2996         staterr = rx_desc->wb.middle.status_error;
2997
2998         while(staterr & E1000_RXD_STAT_DD) {
2999                 buffer_info = &rx_ring->buffer_info[i];
3000                 ps_page = &rx_ring->ps_page[i];
3001                 ps_page_dma = &rx_ring->ps_page_dma[i];
3002 #ifdef CONFIG_E1000_NAPI
3003                 if(unlikely(*work_done >= work_to_do))
3004                         break;
3005                 (*work_done)++;
3006 #endif
3007                 cleaned = TRUE;
3008                 pci_unmap_single(pdev, buffer_info->dma,
3009                                  buffer_info->length,
3010                                  PCI_DMA_FROMDEVICE);
3011
3012                 skb = buffer_info->skb;
3013
3014                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3015                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3016                                   " the full packet\n", netdev->name);
3017                         dev_kfree_skb_irq(skb);
3018                         goto next_desc;
3019                 }
3020
3021                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3022                         dev_kfree_skb_irq(skb);
3023                         goto next_desc;
3024                 }
3025
3026                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3027
3028                 if(unlikely(!length)) {
3029                         E1000_DBG("%s: Last part of the packet spanning"
3030                                   " multiple descriptors\n", netdev->name);
3031                         dev_kfree_skb_irq(skb);
3032                         goto next_desc;
3033                 }
3034
3035                 /* Good Receive */
3036                 skb_put(skb, length);
3037
3038                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3039                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3040                                 break;
3041
3042                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3043                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3044                         ps_page_dma->ps_page_dma[j] = 0;
3045                         skb_shinfo(skb)->frags[j].page =
3046                                 ps_page->ps_page[j];
3047                         ps_page->ps_page[j] = NULL;
3048                         skb_shinfo(skb)->frags[j].page_offset = 0;
3049                         skb_shinfo(skb)->frags[j].size = length;
3050                         skb_shinfo(skb)->nr_frags++;
3051                         skb->len += length;
3052                         skb->data_len += length;
3053                 }
3054
3055                 e1000_rx_checksum(adapter, staterr,
3056                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3057                 skb->protocol = eth_type_trans(skb, netdev);
3058
3059 #ifdef HAVE_RX_ZERO_COPY
3060                 if(likely(rx_desc->wb.upper.header_status &
3061                           E1000_RXDPS_HDRSTAT_HDRSP))
3062                         skb_shinfo(skb)->zero_copy = TRUE;
3063 #endif
3064 #ifdef CONFIG_E1000_NAPI
3065                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3066                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3067                                 le16_to_cpu(rx_desc->wb.middle.vlan &
3068                                         E1000_RXD_SPC_VLAN_MASK));
3069                 } else {
3070                         netif_receive_skb(skb);
3071                 }
3072 #else /* CONFIG_E1000_NAPI */
3073                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3074                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3075                                 le16_to_cpu(rx_desc->wb.middle.vlan &
3076                                         E1000_RXD_SPC_VLAN_MASK));
3077                 } else {
3078                         netif_rx(skb);
3079                 }
3080 #endif /* CONFIG_E1000_NAPI */
3081                 netdev->last_rx = jiffies;
3082
3083 next_desc:
3084                 rx_desc->wb.middle.status_error &= ~0xFF;
3085                 buffer_info->skb = NULL;
3086                 if(unlikely(++i == rx_ring->count)) i = 0;
3087
3088                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3089                 staterr = rx_desc->wb.middle.status_error;
3090         }
3091         rx_ring->next_to_clean = i;
3092         adapter->alloc_rx_buf(adapter);
3093
3094         return cleaned;
3095 }
3096
3097 /**
3098  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3099  * @adapter: address of board private structure
3100  **/
3101
3102 static void
3103 e1000_alloc_rx_buffers(struct e1000_adapter *adapter)
3104 {
3105         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
3106         struct net_device *netdev = adapter->netdev;
3107         struct pci_dev *pdev = adapter->pdev;
3108         struct e1000_rx_desc *rx_desc;
3109         struct e1000_buffer *buffer_info;
3110         struct sk_buff *skb;
3111         unsigned int i;
3112         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3113
3114         i = rx_ring->next_to_use;
3115         buffer_info = &rx_ring->buffer_info[i];
3116
3117         while(!buffer_info->skb) {
3118                 skb = dev_alloc_skb(bufsz);
3119
3120                 if(unlikely(!skb)) {
3121                         /* Better luck next round */
3122                         break;
3123                 }
3124
3125                 /* Fix for errata 23, can't cross 64kB boundary */
3126                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3127                         struct sk_buff *oldskb = skb;
3128                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3129                                              "at %p\n", bufsz, skb->data);
3130                         /* Try again, without freeing the previous */
3131                         skb = dev_alloc_skb(bufsz);
3132                         /* Failed allocation, critical failure */
3133                         if (!skb) {
3134                                 dev_kfree_skb(oldskb);
3135                                 break;
3136                         }
3137
3138                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3139                                 /* give up */
3140                                 dev_kfree_skb(skb);
3141                                 dev_kfree_skb(oldskb);
3142                                 break; /* while !buffer_info->skb */
3143                         } else {
3144                                 /* Use new allocation */
3145                                 dev_kfree_skb(oldskb);
3146                         }
3147                 }
3148                 /* Make buffer alignment 2 beyond a 16 byte boundary
3149                  * this will result in a 16 byte aligned IP header after
3150                  * the 14 byte MAC header is removed
3151                  */
3152                 skb_reserve(skb, NET_IP_ALIGN);
3153
3154                 skb->dev = netdev;
3155
3156                 buffer_info->skb = skb;
3157                 buffer_info->length = adapter->rx_buffer_len;
3158                 buffer_info->dma = pci_map_single(pdev,
3159                                                   skb->data,
3160                                                   adapter->rx_buffer_len,
3161                                                   PCI_DMA_FROMDEVICE);
3162
3163                 /* Fix for errata 23, can't cross 64kB boundary */
3164                 if (!e1000_check_64k_bound(adapter,
3165                                         (void *)(unsigned long)buffer_info->dma,
3166                                         adapter->rx_buffer_len)) {
3167                         DPRINTK(RX_ERR, ERR,
3168                                 "dma align check failed: %u bytes at %p\n",
3169                                 adapter->rx_buffer_len,
3170                                 (void *)(unsigned long)buffer_info->dma);
3171                         dev_kfree_skb(skb);
3172                         buffer_info->skb = NULL;
3173
3174                         pci_unmap_single(pdev, buffer_info->dma,
3175                                          adapter->rx_buffer_len,
3176                                          PCI_DMA_FROMDEVICE);
3177
3178                         break; /* while !buffer_info->skb */
3179                 }
3180                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3181                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3182
3183                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3184                         /* Force memory writes to complete before letting h/w
3185                          * know there are new descriptors to fetch.  (Only
3186                          * applicable for weak-ordered memory model archs,
3187                          * such as IA-64). */
3188                         wmb();
3189                         E1000_WRITE_REG(&adapter->hw, RDT, i);
3190                 }
3191
3192                 if(unlikely(++i == rx_ring->count)) i = 0;
3193                 buffer_info = &rx_ring->buffer_info[i];
3194         }
3195
3196         rx_ring->next_to_use = i;
3197 }
3198
3199 /**
3200  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3201  * @adapter: address of board private structure
3202  **/
3203
3204 static void
3205 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter)
3206 {
3207         struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
3208         struct net_device *netdev = adapter->netdev;
3209         struct pci_dev *pdev = adapter->pdev;
3210         union e1000_rx_desc_packet_split *rx_desc;
3211         struct e1000_buffer *buffer_info;
3212         struct e1000_ps_page *ps_page;
3213         struct e1000_ps_page_dma *ps_page_dma;
3214         struct sk_buff *skb;
3215         unsigned int i, j;
3216
3217         i = rx_ring->next_to_use;
3218         buffer_info = &rx_ring->buffer_info[i];
3219         ps_page = &rx_ring->ps_page[i];
3220         ps_page_dma = &rx_ring->ps_page_dma[i];
3221
3222         while(!buffer_info->skb) {
3223                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3224
3225                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3226                         if(unlikely(!ps_page->ps_page[j])) {
3227                                 ps_page->ps_page[j] =
3228                                         alloc_page(GFP_ATOMIC);
3229                                 if(unlikely(!ps_page->ps_page[j]))
3230                                         goto no_buffers;
3231                                 ps_page_dma->ps_page_dma[j] =
3232                                         pci_map_page(pdev,
3233                                                      ps_page->ps_page[j],
3234                                                      0, PAGE_SIZE,
3235                                                      PCI_DMA_FROMDEVICE);
3236                         }
3237                         /* Refresh the desc even if buffer_addrs didn't
3238                          * change because each write-back erases this info.
3239                          */
3240                         rx_desc->read.buffer_addr[j+1] =
3241                                 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3242                 }
3243
3244                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3245
3246                 if(unlikely(!skb))
3247                         break;
3248
3249                 /* Make buffer alignment 2 beyond a 16 byte boundary
3250                  * this will result in a 16 byte aligned IP header after
3251                  * the 14 byte MAC header is removed
3252                  */
3253                 skb_reserve(skb, NET_IP_ALIGN);
3254
3255                 skb->dev = netdev;
3256
3257                 buffer_info->skb = skb;
3258                 buffer_info->length = adapter->rx_ps_bsize0;
3259                 buffer_info->dma = pci_map_single(pdev, skb->data,
3260                                                   adapter->rx_ps_bsize0,
3261                                                   PCI_DMA_FROMDEVICE);
3262
3263                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3264
3265                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3266                         /* Force memory writes to complete before letting h/w
3267                          * know there are new descriptors to fetch.  (Only
3268                          * applicable for weak-ordered memory model archs,
3269                          * such as IA-64). */
3270                         wmb();
3271                         /* Hardware increments by 16 bytes, but packet split
3272                          * descriptors are 32 bytes...so we increment tail
3273                          * twice as much.
3274                          */
3275                         E1000_WRITE_REG(&adapter->hw, RDT, i<<1);
3276                 }
3277
3278                 if(unlikely(++i == rx_ring->count)) i = 0;
3279                 buffer_info = &rx_ring->buffer_info[i];
3280                 ps_page = &rx_ring->ps_page[i];
3281                 ps_page_dma = &rx_ring->ps_page_dma[i];
3282         }
3283
3284 no_buffers:
3285         rx_ring->next_to_use = i;
3286 }
3287
3288 /**
3289  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3290  * @adapter:
3291  **/
3292
3293 static void
3294 e1000_smartspeed(struct e1000_adapter *adapter)
3295 {
3296         uint16_t phy_status;
3297         uint16_t phy_ctrl;
3298
3299         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3300            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3301                 return;
3302
3303         if(adapter->smartspeed == 0) {
3304                 /* If Master/Slave config fault is asserted twice,
3305                  * we assume back-to-back */
3306                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3307                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3308                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3309                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3310                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3311                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3312                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3313                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3314                                             phy_ctrl);
3315                         adapter->smartspeed++;
3316                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3317                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3318                                                &phy_ctrl)) {
3319                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3320                                              MII_CR_RESTART_AUTO_NEG);
3321                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3322                                                     phy_ctrl);
3323                         }
3324                 }
3325                 return;
3326         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
3327                 /* If still no link, perhaps using 2/3 pair cable */
3328                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3329                 phy_ctrl |= CR_1000T_MS_ENABLE;
3330                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
3331                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3332                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
3333                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3334                                      MII_CR_RESTART_AUTO_NEG);
3335                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
3336                 }
3337         }
3338         /* Restart process after E1000_SMARTSPEED_MAX iterations */
3339         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
3340                 adapter->smartspeed = 0;
3341 }
3342
3343 /**
3344  * e1000_ioctl -
3345  * @netdev:
3346  * @ifreq:
3347  * @cmd:
3348  **/
3349
3350 static int
3351 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3352 {
3353         switch (cmd) {
3354         case SIOCGMIIPHY:
3355         case SIOCGMIIREG:
3356         case SIOCSMIIREG:
3357                 return e1000_mii_ioctl(netdev, ifr, cmd);
3358         default:
3359                 return -EOPNOTSUPP;
3360         }
3361 }
3362
3363 /**
3364  * e1000_mii_ioctl -
3365  * @netdev:
3366  * @ifreq:
3367  * @cmd:
3368  **/
3369
3370 static int
3371 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3372 {
3373         struct e1000_adapter *adapter = netdev->priv;
3374         struct mii_ioctl_data *data = if_mii(ifr);
3375         int retval;
3376         uint16_t mii_reg;
3377         uint16_t spddplx;
3378
3379         if(adapter->hw.media_type != e1000_media_type_copper)
3380                 return -EOPNOTSUPP;
3381
3382         switch (cmd) {
3383         case SIOCGMIIPHY:
3384                 data->phy_id = adapter->hw.phy_addr;
3385                 break;
3386         case SIOCGMIIREG:
3387                 if (!capable(CAP_NET_ADMIN))
3388                         return -EPERM;
3389                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
3390                                    &data->val_out))
3391                         return -EIO;
3392                 break;
3393         case SIOCSMIIREG:
3394                 if (!capable(CAP_NET_ADMIN))
3395                         return -EPERM;
3396                 if (data->reg_num & ~(0x1F))
3397                         return -EFAULT;
3398                 mii_reg = data->val_in;
3399                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
3400                                         mii_reg))
3401                         return -EIO;
3402                 if (adapter->hw.phy_type == e1000_phy_m88) {
3403                         switch (data->reg_num) {
3404                         case PHY_CTRL:
3405                                 if(mii_reg & MII_CR_POWER_DOWN)
3406                                         break;
3407                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
3408                                         adapter->hw.autoneg = 1;
3409                                         adapter->hw.autoneg_advertised = 0x2F;
3410                                 } else {
3411                                         if (mii_reg & 0x40)
3412                                                 spddplx = SPEED_1000;
3413                                         else if (mii_reg & 0x2000)
3414                                                 spddplx = SPEED_100;
3415                                         else
3416                                                 spddplx = SPEED_10;
3417                                         spddplx += (mii_reg & 0x100)
3418                                                    ? FULL_DUPLEX :
3419                                                    HALF_DUPLEX;
3420                                         retval = e1000_set_spd_dplx(adapter,
3421                                                                     spddplx);
3422                                         if(retval)
3423                                                 return retval;
3424                                 }
3425                                 if(netif_running(adapter->netdev)) {
3426                                         e1000_down(adapter);
3427                                         e1000_up(adapter);
3428                                 } else
3429                                         e1000_reset(adapter);
3430                                 break;
3431                         case M88E1000_PHY_SPEC_CTRL:
3432                         case M88E1000_EXT_PHY_SPEC_CTRL:
3433                                 if (e1000_phy_reset(&adapter->hw))
3434                                         return -EIO;
3435                                 break;
3436                         }
3437                 } else {
3438                         switch (data->reg_num) {
3439                         case PHY_CTRL:
3440                                 if(mii_reg & MII_CR_POWER_DOWN)
3441                                         break;
3442                                 if(netif_running(adapter->netdev)) {
3443                                         e1000_down(adapter);
3444                                         e1000_up(adapter);
3445                                 } else
3446                                         e1000_reset(adapter);
3447                                 break;
3448                         }
3449                 }
3450                 break;
3451         default:
3452                 return -EOPNOTSUPP;
3453         }
3454         return E1000_SUCCESS;
3455 }
3456
3457 void
3458 e1000_pci_set_mwi(struct e1000_hw *hw)
3459 {
3460         struct e1000_adapter *adapter = hw->back;
3461         int ret_val = pci_set_mwi(adapter->pdev);
3462
3463         if(ret_val)
3464                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
3465 }
3466
3467 void
3468 e1000_pci_clear_mwi(struct e1000_hw *hw)
3469 {
3470         struct e1000_adapter *adapter = hw->back;
3471
3472         pci_clear_mwi(adapter->pdev);
3473 }
3474
3475 void
3476 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
3477 {
3478         struct e1000_adapter *adapter = hw->back;
3479
3480         pci_read_config_word(adapter->pdev, reg, value);
3481 }
3482
3483 void
3484 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
3485 {
3486         struct e1000_adapter *adapter = hw->back;
3487
3488         pci_write_config_word(adapter->pdev, reg, *value);
3489 }
3490
3491 uint32_t
3492 e1000_io_read(struct e1000_hw *hw, unsigned long port)
3493 {
3494         return inl(port);
3495 }
3496
3497 void
3498 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
3499 {
3500         outl(value, port);
3501 }
3502
3503 static void
3504 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
3505 {
3506         struct e1000_adapter *adapter = netdev->priv;
3507         uint32_t ctrl, rctl;
3508
3509         e1000_irq_disable(adapter);
3510         adapter->vlgrp = grp;
3511
3512         if(grp) {
3513                 /* enable VLAN tag insert/strip */
3514                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3515                 ctrl |= E1000_CTRL_VME;
3516                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3517
3518                 /* enable VLAN receive filtering */
3519                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
3520                 rctl |= E1000_RCTL_VFE;
3521                 rctl &= ~E1000_RCTL_CFIEN;
3522                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
3523                 e1000_update_mng_vlan(adapter);
3524         } else {
3525                 /* disable VLAN tag insert/strip */
3526                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3527                 ctrl &= ~E1000_CTRL_VME;
3528                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3529
3530                 /* disable VLAN filtering */
3531                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
3532                 rctl &= ~E1000_RCTL_VFE;
3533                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
3534                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
3535                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3536                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3537                 }
3538         }
3539
3540         e1000_irq_enable(adapter);
3541 }
3542
3543 static void
3544 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
3545 {
3546         struct e1000_adapter *adapter = netdev->priv;
3547         uint32_t vfta, index;
3548         if((adapter->hw.mng_cookie.status &
3549                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
3550                 (vid == adapter->mng_vlan_id))
3551                 return;
3552         /* add VID to filter table */
3553         index = (vid >> 5) & 0x7F;
3554         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
3555         vfta |= (1 << (vid & 0x1F));
3556         e1000_write_vfta(&adapter->hw, index, vfta);
3557 }
3558
3559 static void
3560 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
3561 {
3562         struct e1000_adapter *adapter = netdev->priv;
3563         uint32_t vfta, index;
3564
3565         e1000_irq_disable(adapter);
3566
3567         if(adapter->vlgrp)
3568                 adapter->vlgrp->vlan_devices[vid] = NULL;
3569
3570         e1000_irq_enable(adapter);
3571
3572         if((adapter->hw.mng_cookie.status &
3573                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
3574                 (vid == adapter->mng_vlan_id))
3575                 return;
3576         /* remove VID from filter table */
3577         index = (vid >> 5) & 0x7F;
3578         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
3579         vfta &= ~(1 << (vid & 0x1F));
3580         e1000_write_vfta(&adapter->hw, index, vfta);
3581 }
3582
3583 static void
3584 e1000_restore_vlan(struct e1000_adapter *adapter)
3585 {
3586         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
3587
3588         if(adapter->vlgrp) {
3589                 uint16_t vid;
3590                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
3591                         if(!adapter->vlgrp->vlan_devices[vid])
3592                                 continue;
3593                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
3594                 }
3595         }
3596 }
3597
3598 int
3599 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
3600 {
3601         adapter->hw.autoneg = 0;
3602
3603         switch(spddplx) {
3604         case SPEED_10 + DUPLEX_HALF:
3605                 adapter->hw.forced_speed_duplex = e1000_10_half;
3606                 break;
3607         case SPEED_10 + DUPLEX_FULL:
3608                 adapter->hw.forced_speed_duplex = e1000_10_full;
3609                 break;
3610         case SPEED_100 + DUPLEX_HALF:
3611                 adapter->hw.forced_speed_duplex = e1000_100_half;
3612                 break;
3613         case SPEED_100 + DUPLEX_FULL:
3614                 adapter->hw.forced_speed_duplex = e1000_100_full;
3615                 break;
3616         case SPEED_1000 + DUPLEX_FULL:
3617                 adapter->hw.autoneg = 1;
3618                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
3619                 break;
3620         case SPEED_1000 + DUPLEX_HALF: /* not supported */
3621         default:
3622                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
3623                 return -EINVAL;
3624         }
3625         return 0;
3626 }
3627
3628 static int
3629 e1000_notify_reboot(struct notifier_block *nb, unsigned long event, void *p)
3630 {
3631         struct pci_dev *pdev = NULL;
3632
3633         switch(event) {
3634         case SYS_DOWN:
3635         case SYS_HALT:
3636         case SYS_POWER_OFF:
3637                 while((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev))) {
3638                         if(pci_dev_driver(pdev) == &e1000_driver)
3639                                 e1000_suspend(pdev, 3);
3640                 }
3641         }
3642         return NOTIFY_DONE;
3643 }
3644
3645 static int
3646 e1000_suspend(struct pci_dev *pdev, uint32_t state)
3647 {
3648         struct net_device *netdev = pci_get_drvdata(pdev);
3649         struct e1000_adapter *adapter = netdev->priv;
3650         uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
3651         uint32_t wufc = adapter->wol;
3652
3653         netif_device_detach(netdev);
3654
3655         if(netif_running(netdev))
3656                 e1000_down(adapter);
3657
3658         status = E1000_READ_REG(&adapter->hw, STATUS);
3659         if(status & E1000_STATUS_LU)
3660                 wufc &= ~E1000_WUFC_LNKC;
3661
3662         if(wufc) {
3663                 e1000_setup_rctl(adapter);
3664                 e1000_set_multi(netdev);
3665
3666                 /* turn on all-multi mode if wake on multicast is enabled */
3667                 if(adapter->wol & E1000_WUFC_MC) {
3668                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
3669                         rctl |= E1000_RCTL_MPE;
3670                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
3671                 }
3672
3673                 if(adapter->hw.mac_type >= e1000_82540) {
3674                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3675                         /* advertise wake from D3Cold */
3676                         #define E1000_CTRL_ADVD3WUC 0x00100000
3677                         /* phy power management enable */
3678                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
3679                         ctrl |= E1000_CTRL_ADVD3WUC |
3680                                 E1000_CTRL_EN_PHY_PWR_MGMT;
3681                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3682                 }
3683
3684                 if(adapter->hw.media_type == e1000_media_type_fiber ||
3685                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
3686                         /* keep the laser running in D3 */
3687                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
3688                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
3689                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
3690                 }
3691
3692                 /* Allow time for pending master requests to run */
3693                 e1000_disable_pciex_master(&adapter->hw);
3694
3695                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
3696                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
3697                 pci_enable_wake(pdev, 3, 1);
3698                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
3699         } else {
3700                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
3701                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
3702                 pci_enable_wake(pdev, 3, 0);
3703                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
3704         }
3705
3706         pci_save_state(pdev);
3707
3708         if(adapter->hw.mac_type >= e1000_82540 &&
3709            adapter->hw.media_type == e1000_media_type_copper) {
3710                 manc = E1000_READ_REG(&adapter->hw, MANC);
3711                 if(manc & E1000_MANC_SMBUS_EN) {
3712                         manc |= E1000_MANC_ARP_EN;
3713                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
3714                         pci_enable_wake(pdev, 3, 1);
3715                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
3716                 }
3717         }
3718
3719         switch(adapter->hw.mac_type) {
3720         case e1000_82573:
3721                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
3722                 E1000_WRITE_REG(&adapter->hw, SWSM,
3723                                 swsm & ~E1000_SWSM_DRV_LOAD);
3724                 break;
3725         default:
3726                 break;
3727         }
3728
3729         pci_disable_device(pdev);
3730
3731         state = (state > 0) ? 3 : 0;
3732         pci_set_power_state(pdev, state);
3733
3734         return 0;
3735 }
3736
3737 #ifdef CONFIG_PM
3738 static int
3739 e1000_resume(struct pci_dev *pdev)
3740 {
3741         struct net_device *netdev = pci_get_drvdata(pdev);
3742         struct e1000_adapter *adapter = netdev->priv;
3743         uint32_t manc, ret, swsm;
3744
3745         pci_set_power_state(pdev, 0);
3746         pci_restore_state(pdev);
3747         ret = pci_enable_device(pdev);
3748         pci_set_master(pdev);
3749
3750         pci_enable_wake(pdev, 3, 0);
3751         pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
3752
3753         e1000_reset(adapter);
3754         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
3755
3756         if(netif_running(netdev))
3757                 e1000_up(adapter);
3758
3759         netif_device_attach(netdev);
3760
3761         if(adapter->hw.mac_type >= e1000_82540 &&
3762            adapter->hw.media_type == e1000_media_type_copper) {
3763                 manc = E1000_READ_REG(&adapter->hw, MANC);
3764                 manc &= ~(E1000_MANC_ARP_EN);
3765                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
3766         }
3767
3768         switch(adapter->hw.mac_type) {
3769         case e1000_82573:
3770                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
3771                 E1000_WRITE_REG(&adapter->hw, SWSM,
3772                                 swsm | E1000_SWSM_DRV_LOAD);
3773                 break;
3774         default:
3775                 break;
3776         }
3777
3778         return 0;
3779 }
3780 #endif
3781 #ifdef CONFIG_NET_POLL_CONTROLLER
3782 /*
3783  * Polling 'interrupt' - used by things like netconsole to send skbs
3784  * without having to re-enable interrupts. It's not called while
3785  * the interrupt routine is executing.
3786  */
3787 static void
3788 e1000_netpoll(struct net_device *netdev)
3789 {
3790         struct e1000_adapter *adapter = netdev->priv;
3791         disable_irq(adapter->pdev->irq);
3792         e1000_intr(adapter->pdev->irq, netdev, NULL);
3793         enable_irq(adapter->pdev->irq);
3794 }
3795 #endif
3796
3797 /* e1000_main.c */