drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2006 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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  26   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27
  28 *******************************************************************************/
  29
  30 #include "e1000.h"
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #ifndef CONFIG_E1000_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION "7.2.7-k2"DRIVERNAPI
  40 char e1000_driver_version[] = DRV_VERSION;
  41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  42
  43 /* e1000_pci_tbl - PCI Device ID Table
  44  *
  45  * Last entry must be all 0s
  46  *
  47  * Macro expands to...
  48  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  49  */
  50 static struct pci_device_id e1000_pci_tbl[] = {
  51         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  52         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  53         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  54         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  55         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  56         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  57         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  58         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  59         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  70         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  71         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  72         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1049),
  77         INTEL_E1000_ETHERNET_DEVICE(0x104A),
  78         INTEL_E1000_ETHERNET_DEVICE(0x104B),
  79         INTEL_E1000_ETHERNET_DEVICE(0x104C),
  80         INTEL_E1000_ETHERNET_DEVICE(0x104D),
  81         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  82         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  88         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  89         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  90         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  94         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  95         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  96         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  97         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1096),
  99         INTEL_E1000_ETHERNET_DEVICE(0x1098),
 100         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 101         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 102         INTEL_E1000_ETHERNET_DEVICE(0x10A4),
 103         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 104         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 105         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
 106         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
 107         /* required last entry */
 108         {0,}
 109 };
 110
 111 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 112
 113 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 114                                     struct e1000_tx_ring *txdr);
 115 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 116                                     struct e1000_rx_ring *rxdr);
 117 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 118                                     struct e1000_tx_ring *tx_ring);
 119 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 120                                     struct e1000_rx_ring *rx_ring);
 121
 122 /* Local Function Prototypes */
 123
 124 static int e1000_init_module(void);
 125 static void e1000_exit_module(void);
 126 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 127 static void __devexit e1000_remove(struct pci_dev *pdev);
 128 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 129 static int e1000_sw_init(struct e1000_adapter *adapter);
 130 static int e1000_open(struct net_device *netdev);
 131 static int e1000_close(struct net_device *netdev);
 132 static void e1000_configure_tx(struct e1000_adapter *adapter);
 133 static void e1000_configure_rx(struct e1000_adapter *adapter);
 134 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 135 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 136 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 137 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 138                                 struct e1000_tx_ring *tx_ring);
 139 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 140                                 struct e1000_rx_ring *rx_ring);
 141 static void e1000_set_multi(struct net_device *netdev);
 142 static void e1000_update_phy_info(unsigned long data);
 143 static void e1000_watchdog(unsigned long data);
 144 static void e1000_82547_tx_fifo_stall(unsigned long data);
 145 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 146 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 147 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 148 static int e1000_set_mac(struct net_device *netdev, void *p);
 149 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 150 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 151                                     struct e1000_tx_ring *tx_ring);
 152 #ifdef CONFIG_E1000_NAPI
 153 static int e1000_clean(struct net_device *poll_dev, int *budget);
 154 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 155                                     struct e1000_rx_ring *rx_ring,
 156                                     int *work_done, int work_to_do);
 157 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 158                                        struct e1000_rx_ring *rx_ring,
 159                                        int *work_done, int work_to_do);
 160 #else
 161 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 162                                     struct e1000_rx_ring *rx_ring);
 163 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 164                                        struct e1000_rx_ring *rx_ring);
 165 #endif
 166 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 167                                    struct e1000_rx_ring *rx_ring,
 168                                    int cleaned_count);
 169 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 170                                       struct e1000_rx_ring *rx_ring,
 171                                       int cleaned_count);
 172 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 173 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 174                            int cmd);
 175 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 176 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 177 static void e1000_tx_timeout(struct net_device *dev);
 178 static void e1000_reset_task(struct net_device *dev);
 179 static void e1000_smartspeed(struct e1000_adapter *adapter);
 180 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 181                                        struct sk_buff *skb);
 182
 183 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 184 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 185 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 186 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 187
 188 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 189 #ifdef CONFIG_PM
 190 static int e1000_resume(struct pci_dev *pdev);
 191 #endif
 192 static void e1000_shutdown(struct pci_dev *pdev);
 193
 194 #ifdef CONFIG_NET_POLL_CONTROLLER
 195 /* for netdump / net console */
 196 static void e1000_netpoll (struct net_device *netdev);
 197 #endif
 198
 199 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 200                      pci_channel_state_t state);
 201 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 202 static void e1000_io_resume(struct pci_dev *pdev);
 203
 204 static struct pci_error_handlers e1000_err_handler = {
 205         .error_detected = e1000_io_error_detected,
 206         .slot_reset = e1000_io_slot_reset,
 207         .resume = e1000_io_resume,
 208 };
 209
 210 static struct pci_driver e1000_driver = {
 211         .name     = e1000_driver_name,
 212         .id_table = e1000_pci_tbl,
 213         .probe    = e1000_probe,
 214         .remove   = __devexit_p(e1000_remove),
 215         /* Power Managment Hooks */
 216         .suspend  = e1000_suspend,
 217 #ifdef CONFIG_PM
 218         .resume   = e1000_resume,
 219 #endif
 220         .shutdown = e1000_shutdown,
 221         .err_handler = &e1000_err_handler
 222 };
 223
 224 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 225 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 226 MODULE_LICENSE("GPL");
 227 MODULE_VERSION(DRV_VERSION);
 228
 229 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 230 module_param(debug, int, 0);
 231 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 232
 233 /**
 234  * e1000_init_module - Driver Registration Routine
 235  *
 236  * e1000_init_module is the first routine called when the driver is
 237  * loaded. All it does is register with the PCI subsystem.
 238  **/
 239
 240 static int __init
 241 e1000_init_module(void)
 242 {
 243         int ret;
 244         printk(KERN_INFO "%s - version %s\n",
 245                e1000_driver_string, e1000_driver_version);
 246
 247         printk(KERN_INFO "%s\n", e1000_copyright);
 248
 249         ret = pci_register_driver(&e1000_driver);
 250
 251         return ret;
 252 }
 253
 254 module_init(e1000_init_module);
 255
 256 /**
 257  * e1000_exit_module - Driver Exit Cleanup Routine
 258  *
 259  * e1000_exit_module is called just before the driver is removed
 260  * from memory.
 261  **/
 262
 263 static void __exit
 264 e1000_exit_module(void)
 265 {
 266         pci_unregister_driver(&e1000_driver);
 267 }
 268
 269 module_exit(e1000_exit_module);
 270
 271 static int e1000_request_irq(struct e1000_adapter *adapter)
 272 {
 273         struct net_device *netdev = adapter->netdev;
 274         int flags, err = 0;
 275
 276         flags = IRQF_SHARED;
 277 #ifdef CONFIG_PCI_MSI
 278         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 279                 adapter->have_msi = TRUE;
 280                 if ((err = pci_enable_msi(adapter->pdev))) {
 281                         DPRINTK(PROBE, ERR,
 282                          "Unable to allocate MSI interrupt Error: %d\n", err);
 283                         adapter->have_msi = FALSE;
 284                 }
 285         }
 286         if (adapter->have_msi)
 287                 flags &= ~IRQF_SHARED;
 288 #endif
 289         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 290                                netdev->name, netdev)))
 291                 DPRINTK(PROBE, ERR,
 292                         "Unable to allocate interrupt Error: %d\n", err);
 293
 294         return err;
 295 }
 296
 297 static void e1000_free_irq(struct e1000_adapter *adapter)
 298 {
 299         struct net_device *netdev = adapter->netdev;
 300
 301         free_irq(adapter->pdev->irq, netdev);
 302
 303 #ifdef CONFIG_PCI_MSI
 304         if (adapter->have_msi)
 305                 pci_disable_msi(adapter->pdev);
 306 #endif
 307 }
 308
 309 /**
 310  * e1000_irq_disable - Mask off interrupt generation on the NIC
 311  * @adapter: board private structure
 312  **/
 313
 314 static void
 315 e1000_irq_disable(struct e1000_adapter *adapter)
 316 {
 317         atomic_inc(&adapter->irq_sem);
 318         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 319         E1000_WRITE_FLUSH(&adapter->hw);
 320         synchronize_irq(adapter->pdev->irq);
 321 }
 322
 323 /**
 324  * e1000_irq_enable - Enable default interrupt generation settings
 325  * @adapter: board private structure
 326  **/
 327
 328 static void
 329 e1000_irq_enable(struct e1000_adapter *adapter)
 330 {
 331         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 332                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 333                 E1000_WRITE_FLUSH(&adapter->hw);
 334         }
 335 }
 336
 337 static void
 338 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 339 {
 340         struct net_device *netdev = adapter->netdev;
 341         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 342         uint16_t old_vid = adapter->mng_vlan_id;
 343         if (adapter->vlgrp) {
 344                 if (!adapter->vlgrp->vlan_devices[vid]) {
 345                         if (adapter->hw.mng_cookie.status &
 346                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 347                                 e1000_vlan_rx_add_vid(netdev, vid);
 348                                 adapter->mng_vlan_id = vid;
 349                         } else
 350                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 351
 352                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 353                                         (vid != old_vid) &&
 354                                         !adapter->vlgrp->vlan_devices[old_vid])
 355                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 356                 } else
 357                         adapter->mng_vlan_id = vid;
 358         }
 359 }
 360
 361 /**
 362  * e1000_release_hw_control - release control of the h/w to f/w
 363  * @adapter: address of board private structure
 364  *
 365  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 366  * For ASF and Pass Through versions of f/w this means that the
 367  * driver is no longer loaded. For AMT version (only with 82573) i
 368  * of the f/w this means that the netowrk i/f is closed.
 369  *
 370  **/
 371
 372 static void
 373 e1000_release_hw_control(struct e1000_adapter *adapter)
 374 {
 375         uint32_t ctrl_ext;
 376         uint32_t swsm;
 377         uint32_t extcnf;
 378
 379         /* Let firmware taken over control of h/w */
 380         switch (adapter->hw.mac_type) {
 381         case e1000_82571:
 382         case e1000_82572:
 383         case e1000_80003es2lan:
 384                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 385                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 386                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 387                 break;
 388         case e1000_82573:
 389                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 390                 E1000_WRITE_REG(&adapter->hw, SWSM,
 391                                 swsm & ~E1000_SWSM_DRV_LOAD);
 392         case e1000_ich8lan:
 393                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 394                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 395                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
 396                 break;
 397         default:
 398                 break;
 399         }
 400 }
 401
 402 /**
 403  * e1000_get_hw_control - get control of the h/w from f/w
 404  * @adapter: address of board private structure
 405  *
 406  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 407  * For ASF and Pass Through versions of f/w this means that
 408  * the driver is loaded. For AMT version (only with 82573)
 409  * of the f/w this means that the netowrk i/f is open.
 410  *
 411  **/
 412
 413 static void
 414 e1000_get_hw_control(struct e1000_adapter *adapter)
 415 {
 416         uint32_t ctrl_ext;
 417         uint32_t swsm;
 418         uint32_t extcnf;
 419         /* Let firmware know the driver has taken over */
 420         switch (adapter->hw.mac_type) {
 421         case e1000_82571:
 422         case e1000_82572:
 423         case e1000_80003es2lan:
 424                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 425                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 426                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 427                 break;
 428         case e1000_82573:
 429                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 430                 E1000_WRITE_REG(&adapter->hw, SWSM,
 431                                 swsm | E1000_SWSM_DRV_LOAD);
 432                 break;
 433         case e1000_ich8lan:
 434                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
 435                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
 436                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
 437                 break;
 438         default:
 439                 break;
 440         }
 441 }
 442
 443 int
 444 e1000_up(struct e1000_adapter *adapter)
 445 {
 446         struct net_device *netdev = adapter->netdev;
 447         int i;
 448
 449         /* hardware has been reset, we need to reload some things */
 450
 451         e1000_set_multi(netdev);
 452
 453         e1000_restore_vlan(adapter);
 454
 455         e1000_configure_tx(adapter);
 456         e1000_setup_rctl(adapter);
 457         e1000_configure_rx(adapter);
 458         /* call E1000_DESC_UNUSED which always leaves
 459          * at least 1 descriptor unused to make sure
 460          * next_to_use != next_to_clean */
 461         for (i = 0; i < adapter->num_rx_queues; i++) {
 462                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 463                 adapter->alloc_rx_buf(adapter, ring,
 464                                       E1000_DESC_UNUSED(ring));
 465         }
 466
 467         adapter->tx_queue_len = netdev->tx_queue_len;
 468
 469         mod_timer(&adapter->watchdog_timer, jiffies);
 470
 471 #ifdef CONFIG_E1000_NAPI
 472         netif_poll_enable(netdev);
 473 #endif
 474         e1000_irq_enable(adapter);
 475
 476         return 0;
 477 }
 478
 479 /**
 480  * e1000_power_up_phy - restore link in case the phy was powered down
 481  * @adapter: address of board private structure
 482  *
 483  * The phy may be powered down to save power and turn off link when the
 484  * driver is unloaded and wake on lan is not enabled (among others)
 485  * *** this routine MUST be followed by a call to e1000_reset ***
 486  *
 487  **/
 488
 489 void e1000_power_up_phy(struct e1000_adapter *adapter)
 490 {
 491         uint16_t mii_reg = 0;
 492
 493         /* Just clear the power down bit to wake the phy back up */
 494         if (adapter->hw.media_type == e1000_media_type_copper) {
 495                 /* according to the manual, the phy will retain its
 496                  * settings across a power-down/up cycle */
 497                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 498                 mii_reg &= ~MII_CR_POWER_DOWN;
 499                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 500         }
 501 }
 502
 503 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 504 {
 505         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 506                                       e1000_check_mng_mode(&adapter->hw);
 507         /* Power down the PHY so no link is implied when interface is down
 508          * The PHY cannot be powered down if any of the following is TRUE
 509          * (a) WoL is enabled
 510          * (b) AMT is active
 511          * (c) SoL/IDER session is active */
 512         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 513             adapter->hw.mac_type != e1000_ich8lan &&
 514             adapter->hw.media_type == e1000_media_type_copper &&
 515             !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 516             !mng_mode_enabled &&
 517             !e1000_check_phy_reset_block(&adapter->hw)) {
 518                 uint16_t mii_reg = 0;
 519                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 520                 mii_reg |= MII_CR_POWER_DOWN;
 521                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 522                 mdelay(1);
 523         }
 524 }
 525
 526 void
 527 e1000_down(struct e1000_adapter *adapter)
 528 {
 529         struct net_device *netdev = adapter->netdev;
 530
 531         e1000_irq_disable(adapter);
 532
 533         del_timer_sync(&adapter->tx_fifo_stall_timer);
 534         del_timer_sync(&adapter->watchdog_timer);
 535         del_timer_sync(&adapter->phy_info_timer);
 536
 537 #ifdef CONFIG_E1000_NAPI
 538         netif_poll_disable(netdev);
 539 #endif
 540         netdev->tx_queue_len = adapter->tx_queue_len;
 541         adapter->link_speed = 0;
 542         adapter->link_duplex = 0;
 543         netif_carrier_off(netdev);
 544         netif_stop_queue(netdev);
 545
 546         e1000_reset(adapter);
 547         e1000_clean_all_tx_rings(adapter);
 548         e1000_clean_all_rx_rings(adapter);
 549 }
 550
 551 void
 552 e1000_reinit_locked(struct e1000_adapter *adapter)
 553 {
 554         WARN_ON(in_interrupt());
 555         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 556                 msleep(1);
 557         e1000_down(adapter);
 558         e1000_up(adapter);
 559         clear_bit(__E1000_RESETTING, &adapter->flags);
 560 }
 561
 562 void
 563 e1000_reset(struct e1000_adapter *adapter)
 564 {
 565         uint32_t pba, manc;
 566         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 567
 568         /* Repartition Pba for greater than 9k mtu
 569          * To take effect CTRL.RST is required.
 570          */
 571
 572         switch (adapter->hw.mac_type) {
 573         case e1000_82547:
 574         case e1000_82547_rev_2:
 575                 pba = E1000_PBA_30K;
 576                 break;
 577         case e1000_82571:
 578         case e1000_82572:
 579         case e1000_80003es2lan:
 580                 pba = E1000_PBA_38K;
 581                 break;
 582         case e1000_82573:
 583                 pba = E1000_PBA_12K;
 584                 break;
 585         case e1000_ich8lan:
 586                 pba = E1000_PBA_8K;
 587                 break;
 588         default:
 589                 pba = E1000_PBA_48K;
 590                 break;
 591         }
 592
 593         if ((adapter->hw.mac_type != e1000_82573) &&
 594            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 595                 pba -= 8; /* allocate more FIFO for Tx */
 596
 597
 598         if (adapter->hw.mac_type == e1000_82547) {
 599                 adapter->tx_fifo_head = 0;
 600                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 601                 adapter->tx_fifo_size =
 602                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 603                 atomic_set(&adapter->tx_fifo_stall, 0);
 604         }
 605
 606         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 607
 608         /* flow control settings */
 609         /* Set the FC high water mark to 90% of the FIFO size.
 610          * Required to clear last 3 LSB */
 611         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 612         /* We can't use 90% on small FIFOs because the remainder
 613          * would be less than 1 full frame.  In this case, we size
 614          * it to allow at least a full frame above the high water
 615          *  mark. */
 616         if (pba < E1000_PBA_16K)
 617                 fc_high_water_mark = (pba * 1024) - 1600;
 618
 619         adapter->hw.fc_high_water = fc_high_water_mark;
 620         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 621         if (adapter->hw.mac_type == e1000_80003es2lan)
 622                 adapter->hw.fc_pause_time = 0xFFFF;
 623         else
 624                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 625         adapter->hw.fc_send_xon = 1;
 626         adapter->hw.fc = adapter->hw.original_fc;
 627
 628         /* Allow time for pending master requests to run */
 629         e1000_reset_hw(&adapter->hw);
 630         if (adapter->hw.mac_type >= e1000_82544)
 631                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 632         if (e1000_init_hw(&adapter->hw))
 633                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 634         e1000_update_mng_vlan(adapter);
 635         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 636         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 637
 638         e1000_reset_adaptive(&adapter->hw);
 639         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 640
 641         if (!adapter->smart_power_down &&
 642             (adapter->hw.mac_type == e1000_82571 ||
 643              adapter->hw.mac_type == e1000_82572)) {
 644                 uint16_t phy_data = 0;
 645                 /* speed up time to link by disabling smart power down, ignore
 646                  * the return value of this function because there is nothing
 647                  * different we would do if it failed */
 648                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 649                                    &phy_data);
 650                 phy_data &= ~IGP02E1000_PM_SPD;
 651                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 652                                     phy_data);
 653         }
 654
 655         if (adapter->hw.mac_type < e1000_ich8lan)
 656         /* FIXME: this code is duplicate and wrong for PCI Express */
 657         if (adapter->en_mng_pt) {
 658                 manc = E1000_READ_REG(&adapter->hw, MANC);
 659                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 660                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 661         }
 662 }
 663
 664 /**
 665  * e1000_probe - Device Initialization Routine
 666  * @pdev: PCI device information struct
 667  * @ent: entry in e1000_pci_tbl
 668  *
 669  * Returns 0 on success, negative on failure
 670  *
 671  * e1000_probe initializes an adapter identified by a pci_dev structure.
 672  * The OS initialization, configuring of the adapter private structure,
 673  * and a hardware reset occur.
 674  **/
 675
 676 static int __devinit
 677 e1000_probe(struct pci_dev *pdev,
 678             const struct pci_device_id *ent)
 679 {
 680         struct net_device *netdev;
 681         struct e1000_adapter *adapter;
 682         unsigned long mmio_start, mmio_len;
 683         unsigned long flash_start, flash_len;
 684
 685         static int cards_found = 0;
 686         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 687         int i, err, pci_using_dac;
 688         uint16_t eeprom_data = 0;
 689         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 690         if ((err = pci_enable_device(pdev)))
 691                 return err;
 692
 693         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 694             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 695                 pci_using_dac = 1;
 696         } else {
 697                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 698                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 699                         E1000_ERR("No usable DMA configuration, aborting\n");
 700                         goto err_dma;
 701                 }
 702                 pci_using_dac = 0;
 703         }
 704
 705         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 706                 goto err_pci_reg;
 707
 708         pci_set_master(pdev);
 709
 710         err = -ENOMEM;
 711         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 712         if (!netdev)
 713                 goto err_alloc_etherdev;
 714
 715         SET_MODULE_OWNER(netdev);
 716         SET_NETDEV_DEV(netdev, &pdev->dev);
 717
 718         pci_set_drvdata(pdev, netdev);
 719         adapter = netdev_priv(netdev);
 720         adapter->netdev = netdev;
 721         adapter->pdev = pdev;
 722         adapter->hw.back = adapter;
 723         adapter->msg_enable = (1 << debug) - 1;
 724
 725         mmio_start = pci_resource_start(pdev, BAR_0);
 726         mmio_len = pci_resource_len(pdev, BAR_0);
 727
 728         err = -EIO;
 729         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 730         if (!adapter->hw.hw_addr)
 731                 goto err_ioremap;
 732
 733         for (i = BAR_1; i <= BAR_5; i++) {
 734                 if (pci_resource_len(pdev, i) == 0)
 735                         continue;
 736                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 737                         adapter->hw.io_base = pci_resource_start(pdev, i);
 738                         break;
 739                 }
 740         }
 741
 742         netdev->open = &e1000_open;
 743         netdev->stop = &e1000_close;
 744         netdev->hard_start_xmit = &e1000_xmit_frame;
 745         netdev->get_stats = &e1000_get_stats;
 746         netdev->set_multicast_list = &e1000_set_multi;
 747         netdev->set_mac_address = &e1000_set_mac;
 748         netdev->change_mtu = &e1000_change_mtu;
 749         netdev->do_ioctl = &e1000_ioctl;
 750         e1000_set_ethtool_ops(netdev);
 751         netdev->tx_timeout = &e1000_tx_timeout;
 752         netdev->watchdog_timeo = 5 * HZ;
 753 #ifdef CONFIG_E1000_NAPI
 754         netdev->poll = &e1000_clean;
 755         netdev->weight = 64;
 756 #endif
 757         netdev->vlan_rx_register = e1000_vlan_rx_register;
 758         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 759         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 760 #ifdef CONFIG_NET_POLL_CONTROLLER
 761         netdev->poll_controller = e1000_netpoll;
 762 #endif
 763         strcpy(netdev->name, pci_name(pdev));
 764
 765         netdev->mem_start = mmio_start;
 766         netdev->mem_end = mmio_start + mmio_len;
 767         netdev->base_addr = adapter->hw.io_base;
 768
 769         adapter->bd_number = cards_found;
 770
 771         /* setup the private structure */
 772
 773         if ((err = e1000_sw_init(adapter)))
 774                 goto err_sw_init;
 775
 776         err = -EIO;
 777         /* Flash BAR mapping must happen after e1000_sw_init
 778          * because it depends on mac_type */
 779         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 780            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 781                 flash_start = pci_resource_start(pdev, 1);
 782                 flash_len = pci_resource_len(pdev, 1);
 783                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 784                 if (!adapter->hw.flash_address)
 785                         goto err_flashmap;
 786         }
 787
 788         if (e1000_check_phy_reset_block(&adapter->hw))
 789                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 790
 791         if (adapter->hw.mac_type >= e1000_82543) {
 792                 netdev->features = NETIF_F_SG |
 793                                    NETIF_F_HW_CSUM |
 794                                    NETIF_F_HW_VLAN_TX |
 795                                    NETIF_F_HW_VLAN_RX |
 796                                    NETIF_F_HW_VLAN_FILTER;
 797                 if (adapter->hw.mac_type == e1000_ich8lan)
 798                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
 799         }
 800
 801 #ifdef NETIF_F_TSO
 802         if ((adapter->hw.mac_type >= e1000_82544) &&
 803            (adapter->hw.mac_type != e1000_82547))
 804                 netdev->features |= NETIF_F_TSO;
 805
 806 #ifdef NETIF_F_TSO_IPV6
 807         if (adapter->hw.mac_type > e1000_82547_rev_2)
 808                 netdev->features |= NETIF_F_TSO_IPV6;
 809 #endif
 810 #endif
 811         if (pci_using_dac)
 812                 netdev->features |= NETIF_F_HIGHDMA;
 813
 814         netdev->features |= NETIF_F_LLTX;
 815
 816         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 817
 818         /* initialize eeprom parameters */
 819
 820         if (e1000_init_eeprom_params(&adapter->hw)) {
 821                 E1000_ERR("EEPROM initialization failed\n");
 822                 goto err_eeprom;
 823         }
 824
 825         /* before reading the EEPROM, reset the controller to
 826          * put the device in a known good starting state */
 827
 828         e1000_reset_hw(&adapter->hw);
 829
 830         /* make sure the EEPROM is good */
 831
 832         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 833                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 834                 goto err_eeprom;
 835         }
 836
 837         /* copy the MAC address out of the EEPROM */
 838
 839         if (e1000_read_mac_addr(&adapter->hw))
 840                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 841         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 842         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 843
 844         if (!is_valid_ether_addr(netdev->perm_addr)) {
 845                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 846                 goto err_eeprom;
 847         }
 848
 849         e1000_get_bus_info(&adapter->hw);
 850
 851         init_timer(&adapter->tx_fifo_stall_timer);
 852         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 853         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 854
 855         init_timer(&adapter->watchdog_timer);
 856         adapter->watchdog_timer.function = &e1000_watchdog;
 857         adapter->watchdog_timer.data = (unsigned long) adapter;
 858
 859         init_timer(&adapter->phy_info_timer);
 860         adapter->phy_info_timer.function = &e1000_update_phy_info;
 861         adapter->phy_info_timer.data = (unsigned long) adapter;
 862
 863         INIT_WORK(&adapter->reset_task,
 864                 (void (*)(void *))e1000_reset_task, netdev);
 865
 866         /* we're going to reset, so assume we have no link for now */
 867
 868         netif_carrier_off(netdev);
 869         netif_stop_queue(netdev);
 870
 871         e1000_check_options(adapter);
 872
 873         /* Initial Wake on LAN setting
 874          * If APM wake is enabled in the EEPROM,
 875          * enable the ACPI Magic Packet filter
 876          */
 877
 878         switch (adapter->hw.mac_type) {
 879         case e1000_82542_rev2_0:
 880         case e1000_82542_rev2_1:
 881         case e1000_82543:
 882                 break;
 883         case e1000_82544:
 884                 e1000_read_eeprom(&adapter->hw,
 885                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 886                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 887                 break;
 888         case e1000_ich8lan:
 889                 e1000_read_eeprom(&adapter->hw,
 890                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
 891                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
 892                 break;
 893         case e1000_82546:
 894         case e1000_82546_rev_3:
 895         case e1000_82571:
 896         case e1000_80003es2lan:
 897                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 898                         e1000_read_eeprom(&adapter->hw,
 899                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 900                         break;
 901                 }
 902                 /* Fall Through */
 903         default:
 904                 e1000_read_eeprom(&adapter->hw,
 905                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 906                 break;
 907         }
 908         if (eeprom_data & eeprom_apme_mask)
 909                 adapter->eeprom_wol |= E1000_WUFC_MAG;
 910
 911         /* now that we have the eeprom settings, apply the special cases
 912          * where the eeprom may be wrong or the board simply won't support
 913          * wake on lan on a particular port */
 914         switch (pdev->device) {
 915         case E1000_DEV_ID_82546GB_PCIE:
 916                 adapter->eeprom_wol = 0;
 917                 break;
 918         case E1000_DEV_ID_82546EB_FIBER:
 919         case E1000_DEV_ID_82546GB_FIBER:
 920         case E1000_DEV_ID_82571EB_FIBER:
 921                 /* Wake events only supported on port A for dual fiber
 922                  * regardless of eeprom setting */
 923                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 924                         adapter->eeprom_wol = 0;
 925                 break;
 926         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
 927         case E1000_DEV_ID_82571EB_QUAD_COPPER:
 928                 /* if quad port adapter, disable WoL on all but port A */
 929                 if (global_quad_port_a != 0)
 930                         adapter->eeprom_wol = 0;
 931                 else
 932                         adapter->quad_port_a = 1;
 933                 /* Reset for multiple quad port adapters */
 934                 if (++global_quad_port_a == 4)
 935                         global_quad_port_a = 0;
 936                 break;
 937         }
 938
 939         /* initialize the wol settings based on the eeprom settings */
 940         adapter->wol = adapter->eeprom_wol;
 941
 942         /* print bus type/speed/width info */
 943         {
 944         struct e1000_hw *hw = &adapter->hw;
 945         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 946                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 947                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 948                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 949                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 950                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 951                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 952                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 953                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 954                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 955                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 956                  "32-bit"));
 957         }
 958
 959         for (i = 0; i < 6; i++)
 960                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 961
 962         /* reset the hardware with the new settings */
 963         e1000_reset(adapter);
 964
 965         /* If the controller is 82573 and f/w is AMT, do not set
 966          * DRV_LOAD until the interface is up.  For all other cases,
 967          * let the f/w know that the h/w is now under the control
 968          * of the driver. */
 969         if (adapter->hw.mac_type != e1000_82573 ||
 970             !e1000_check_mng_mode(&adapter->hw))
 971                 e1000_get_hw_control(adapter);
 972
 973         strcpy(netdev->name, "eth%d");
 974         if ((err = register_netdev(netdev)))
 975                 goto err_register;
 976
 977         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 978
 979         cards_found++;
 980         return 0;
 981
 982 err_register:
 983         e1000_release_hw_control(adapter);
 984 err_eeprom:
 985         if (!e1000_check_phy_reset_block(&adapter->hw))
 986                 e1000_phy_hw_reset(&adapter->hw);
 987
 988         if (adapter->hw.flash_address)
 989                 iounmap(adapter->hw.flash_address);
 990 err_flashmap:
 991 #ifdef CONFIG_E1000_NAPI
 992         for (i = 0; i < adapter->num_rx_queues; i++)
 993                 dev_put(&adapter->polling_netdev[i]);
 994 #endif
 995
 996         kfree(adapter->tx_ring);
 997         kfree(adapter->rx_ring);
 998 #ifdef CONFIG_E1000_NAPI
 999         kfree(adapter->polling_netdev);
1000 #endif
1001 err_sw_init:
1002         iounmap(adapter->hw.hw_addr);
1003 err_ioremap:
1004         free_netdev(netdev);
1005 err_alloc_etherdev:
1006         pci_release_regions(pdev);
1007 err_pci_reg:
1008 err_dma:
1009         pci_disable_device(pdev);
1010         return err;
1011 }
1012
1013 /**
1014  * e1000_remove - Device Removal Routine
1015  * @pdev: PCI device information struct
1016  *
1017  * e1000_remove is called by the PCI subsystem to alert the driver
1018  * that it should release a PCI device.  The could be caused by a
1019  * Hot-Plug event, or because the driver is going to be removed from
1020  * memory.
1021  **/
1022
1023 static void __devexit
1024 e1000_remove(struct pci_dev *pdev)
1025 {
1026         struct net_device *netdev = pci_get_drvdata(pdev);
1027         struct e1000_adapter *adapter = netdev_priv(netdev);
1028         uint32_t manc;
1029 #ifdef CONFIG_E1000_NAPI
1030         int i;
1031 #endif
1032
1033         flush_scheduled_work();
1034
1035         if (adapter->hw.mac_type >= e1000_82540 &&
1036            adapter->hw.mac_type != e1000_ich8lan &&
1037            adapter->hw.media_type == e1000_media_type_copper) {
1038                 manc = E1000_READ_REG(&adapter->hw, MANC);
1039                 if (manc & E1000_MANC_SMBUS_EN) {
1040                         manc |= E1000_MANC_ARP_EN;
1041                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
1042                 }
1043         }
1044
1045         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1046          * would have already happened in close and is redundant. */
1047         e1000_release_hw_control(adapter);
1048
1049         unregister_netdev(netdev);
1050 #ifdef CONFIG_E1000_NAPI
1051         for (i = 0; i < adapter->num_rx_queues; i++)
1052                 dev_put(&adapter->polling_netdev[i]);
1053 #endif
1054
1055         if (!e1000_check_phy_reset_block(&adapter->hw))
1056                 e1000_phy_hw_reset(&adapter->hw);
1057
1058         kfree(adapter->tx_ring);
1059         kfree(adapter->rx_ring);
1060 #ifdef CONFIG_E1000_NAPI
1061         kfree(adapter->polling_netdev);
1062 #endif
1063
1064         iounmap(adapter->hw.hw_addr);
1065         if (adapter->hw.flash_address)
1066                 iounmap(adapter->hw.flash_address);
1067         pci_release_regions(pdev);
1068
1069         free_netdev(netdev);
1070
1071         pci_disable_device(pdev);
1072 }
1073
1074 /**
1075  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1076  * @adapter: board private structure to initialize
1077  *
1078  * e1000_sw_init initializes the Adapter private data structure.
1079  * Fields are initialized based on PCI device information and
1080  * OS network device settings (MTU size).
1081  **/
1082
1083 static int __devinit
1084 e1000_sw_init(struct e1000_adapter *adapter)
1085 {
1086         struct e1000_hw *hw = &adapter->hw;
1087         struct net_device *netdev = adapter->netdev;
1088         struct pci_dev *pdev = adapter->pdev;
1089 #ifdef CONFIG_E1000_NAPI
1090         int i;
1091 #endif
1092
1093         /* PCI config space info */
1094
1095         hw->vendor_id = pdev->vendor;
1096         hw->device_id = pdev->device;
1097         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1098         hw->subsystem_id = pdev->subsystem_device;
1099
1100         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1101
1102         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1103
1104         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1105         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1106         hw->max_frame_size = netdev->mtu +
1107                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1108         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1109
1110         /* identify the MAC */
1111
1112         if (e1000_set_mac_type(hw)) {
1113                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1114                 return -EIO;
1115         }
1116
1117         switch (hw->mac_type) {
1118         default:
1119                 break;
1120         case e1000_82541:
1121         case e1000_82547:
1122         case e1000_82541_rev_2:
1123         case e1000_82547_rev_2:
1124                 hw->phy_init_script = 1;
1125                 break;
1126         }
1127
1128         e1000_set_media_type(hw);
1129
1130         hw->wait_autoneg_complete = FALSE;
1131         hw->tbi_compatibility_en = TRUE;
1132         hw->adaptive_ifs = TRUE;
1133
1134         /* Copper options */
1135
1136         if (hw->media_type == e1000_media_type_copper) {
1137                 hw->mdix = AUTO_ALL_MODES;
1138                 hw->disable_polarity_correction = FALSE;
1139                 hw->master_slave = E1000_MASTER_SLAVE;
1140         }
1141
1142         adapter->num_tx_queues = 1;
1143         adapter->num_rx_queues = 1;
1144
1145         if (e1000_alloc_queues(adapter)) {
1146                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1147                 return -ENOMEM;
1148         }
1149
1150 #ifdef CONFIG_E1000_NAPI
1151         for (i = 0; i < adapter->num_rx_queues; i++) {
1152                 adapter->polling_netdev[i].priv = adapter;
1153                 adapter->polling_netdev[i].poll = &e1000_clean;
1154                 adapter->polling_netdev[i].weight = 64;
1155                 dev_hold(&adapter->polling_netdev[i]);
1156                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1157         }
1158         spin_lock_init(&adapter->tx_queue_lock);
1159 #endif
1160
1161         atomic_set(&adapter->irq_sem, 1);
1162         spin_lock_init(&adapter->stats_lock);
1163
1164         return 0;
1165 }
1166
1167 /**
1168  * e1000_alloc_queues - Allocate memory for all rings
1169  * @adapter: board private structure to initialize
1170  *
1171  * We allocate one ring per queue at run-time since we don't know the
1172  * number of queues at compile-time.  The polling_netdev array is
1173  * intended for Multiqueue, but should work fine with a single queue.
1174  **/
1175
1176 static int __devinit
1177 e1000_alloc_queues(struct e1000_adapter *adapter)
1178 {
1179         int size;
1180
1181         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1182         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1183         if (!adapter->tx_ring)
1184                 return -ENOMEM;
1185         memset(adapter->tx_ring, 0, size);
1186
1187         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1188         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1189         if (!adapter->rx_ring) {
1190                 kfree(adapter->tx_ring);
1191                 return -ENOMEM;
1192         }
1193         memset(adapter->rx_ring, 0, size);
1194
1195 #ifdef CONFIG_E1000_NAPI
1196         size = sizeof(struct net_device) * adapter->num_rx_queues;
1197         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1198         if (!adapter->polling_netdev) {
1199                 kfree(adapter->tx_ring);
1200                 kfree(adapter->rx_ring);
1201                 return -ENOMEM;
1202         }
1203         memset(adapter->polling_netdev, 0, size);
1204 #endif
1205
1206         return E1000_SUCCESS;
1207 }
1208
1209 /**
1210  * e1000_open - Called when a network interface is made active
1211  * @netdev: network interface device structure
1212  *
1213  * Returns 0 on success, negative value on failure
1214  *
1215  * The open entry point is called when a network interface is made
1216  * active by the system (IFF_UP).  At this point all resources needed
1217  * for transmit and receive operations are allocated, the interrupt
1218  * handler is registered with the OS, the watchdog timer is started,
1219  * and the stack is notified that the interface is ready.
1220  **/
1221
1222 static int
1223 e1000_open(struct net_device *netdev)
1224 {
1225         struct e1000_adapter *adapter = netdev_priv(netdev);
1226         int err;
1227
1228         /* disallow open during test */
1229         if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1230                 return -EBUSY;
1231
1232         /* allocate transmit descriptors */
1233
1234         if ((err = e1000_setup_all_tx_resources(adapter)))
1235                 goto err_setup_tx;
1236
1237         /* allocate receive descriptors */
1238
1239         if ((err = e1000_setup_all_rx_resources(adapter)))
1240                 goto err_setup_rx;
1241
1242         err = e1000_request_irq(adapter);
1243         if (err)
1244                 goto err_req_irq;
1245
1246         e1000_power_up_phy(adapter);
1247
1248         if ((err = e1000_up(adapter)))
1249                 goto err_up;
1250         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1251         if ((adapter->hw.mng_cookie.status &
1252                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1253                 e1000_update_mng_vlan(adapter);
1254         }
1255
1256         /* If AMT is enabled, let the firmware know that the network
1257          * interface is now open */
1258         if (adapter->hw.mac_type == e1000_82573 &&
1259             e1000_check_mng_mode(&adapter->hw))
1260                 e1000_get_hw_control(adapter);
1261
1262         return E1000_SUCCESS;
1263
1264 err_up:
1265         e1000_power_down_phy(adapter);
1266         e1000_free_irq(adapter);
1267 err_req_irq:
1268         e1000_free_all_rx_resources(adapter);
1269 err_setup_rx:
1270         e1000_free_all_tx_resources(adapter);
1271 err_setup_tx:
1272         e1000_reset(adapter);
1273
1274         return err;
1275 }
1276
1277 /**
1278  * e1000_close - Disables a network interface
1279  * @netdev: network interface device structure
1280  *
1281  * Returns 0, this is not allowed to fail
1282  *
1283  * The close entry point is called when an interface is de-activated
1284  * by the OS.  The hardware is still under the drivers control, but
1285  * needs to be disabled.  A global MAC reset is issued to stop the
1286  * hardware, and all transmit and receive resources are freed.
1287  **/
1288
1289 static int
1290 e1000_close(struct net_device *netdev)
1291 {
1292         struct e1000_adapter *adapter = netdev_priv(netdev);
1293
1294         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1295         e1000_down(adapter);
1296         e1000_power_down_phy(adapter);
1297         e1000_free_irq(adapter);
1298
1299         e1000_free_all_tx_resources(adapter);
1300         e1000_free_all_rx_resources(adapter);
1301
1302         if ((adapter->hw.mng_cookie.status &
1303                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1304                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1305         }
1306
1307         /* If AMT is enabled, let the firmware know that the network
1308          * interface is now closed */
1309         if (adapter->hw.mac_type == e1000_82573 &&
1310             e1000_check_mng_mode(&adapter->hw))
1311                 e1000_release_hw_control(adapter);
1312
1313         return 0;
1314 }
1315
1316 /**
1317  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1318  * @adapter: address of board private structure
1319  * @start: address of beginning of memory
1320  * @len: length of memory
1321  **/
1322 static boolean_t
1323 e1000_check_64k_bound(struct e1000_adapter *adapter,
1324                       void *start, unsigned long len)
1325 {
1326         unsigned long begin = (unsigned long) start;
1327         unsigned long end = begin + len;
1328
1329         /* First rev 82545 and 82546 need to not allow any memory
1330          * write location to cross 64k boundary due to errata 23 */
1331         if (adapter->hw.mac_type == e1000_82545 ||
1332             adapter->hw.mac_type == e1000_82546) {
1333                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1334         }
1335
1336         return TRUE;
1337 }
1338
1339 /**
1340  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1341  * @adapter: board private structure
1342  * @txdr:    tx descriptor ring (for a specific queue) to setup
1343  *
1344  * Return 0 on success, negative on failure
1345  **/
1346
1347 static int
1348 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1349                          struct e1000_tx_ring *txdr)
1350 {
1351         struct pci_dev *pdev = adapter->pdev;
1352         int size;
1353
1354         size = sizeof(struct e1000_buffer) * txdr->count;
1355         txdr->buffer_info = vmalloc(size);
1356         if (!txdr->buffer_info) {
1357                 DPRINTK(PROBE, ERR,
1358                 "Unable to allocate memory for the transmit descriptor ring\n");
1359                 return -ENOMEM;
1360         }
1361         memset(txdr->buffer_info, 0, size);
1362
1363         /* round up to nearest 4K */
1364
1365         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1366         E1000_ROUNDUP(txdr->size, 4096);
1367
1368         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1369         if (!txdr->desc) {
1370 setup_tx_desc_die:
1371                 vfree(txdr->buffer_info);
1372                 DPRINTK(PROBE, ERR,
1373                 "Unable to allocate memory for the transmit descriptor ring\n");
1374                 return -ENOMEM;
1375         }
1376
1377         /* Fix for errata 23, can't cross 64kB boundary */
1378         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1379                 void *olddesc = txdr->desc;
1380                 dma_addr_t olddma = txdr->dma;
1381                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1382                                      "at %p\n", txdr->size, txdr->desc);
1383                 /* Try again, without freeing the previous */
1384                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1385                 /* Failed allocation, critical failure */
1386                 if (!txdr->desc) {
1387                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1388                         goto setup_tx_desc_die;
1389                 }
1390
1391                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1392                         /* give up */
1393                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1394                                             txdr->dma);
1395                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1396                         DPRINTK(PROBE, ERR,
1397                                 "Unable to allocate aligned memory "
1398                                 "for the transmit descriptor ring\n");
1399                         vfree(txdr->buffer_info);
1400                         return -ENOMEM;
1401                 } else {
1402                         /* Free old allocation, new allocation was successful */
1403                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1404                 }
1405         }
1406         memset(txdr->desc, 0, txdr->size);
1407
1408         txdr->next_to_use = 0;
1409         txdr->next_to_clean = 0;
1410         spin_lock_init(&txdr->tx_lock);
1411
1412         return 0;
1413 }
1414
1415 /**
1416  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1417  *                                (Descriptors) for all queues
1418  * @adapter: board private structure
1419  *
1420  * Return 0 on success, negative on failure
1421  **/
1422
1423 int
1424 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1425 {
1426         int i, err = 0;
1427
1428         for (i = 0; i < adapter->num_tx_queues; i++) {
1429                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1430                 if (err) {
1431                         DPRINTK(PROBE, ERR,
1432                                 "Allocation for Tx Queue %u failed\n", i);
1433                         for (i-- ; i >= 0; i--)
1434                                 e1000_free_tx_resources(adapter,
1435                                                         &adapter->tx_ring[i]);
1436                         break;
1437                 }
1438         }
1439
1440         return err;
1441 }
1442
1443 /**
1444  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1445  * @adapter: board private structure
1446  *
1447  * Configure the Tx unit of the MAC after a reset.
1448  **/
1449
1450 static void
1451 e1000_configure_tx(struct e1000_adapter *adapter)
1452 {
1453         uint64_t tdba;
1454         struct e1000_hw *hw = &adapter->hw;
1455         uint32_t tdlen, tctl, tipg, tarc;
1456         uint32_t ipgr1, ipgr2;
1457
1458         /* Setup the HW Tx Head and Tail descriptor pointers */
1459
1460         switch (adapter->num_tx_queues) {
1461         case 1:
1462         default:
1463                 tdba = adapter->tx_ring[0].dma;
1464                 tdlen = adapter->tx_ring[0].count *
1465                         sizeof(struct e1000_tx_desc);
1466                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1467                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1468                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1469                 E1000_WRITE_REG(hw, TDT, 0);
1470                 E1000_WRITE_REG(hw, TDH, 0);
1471                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1472                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1473                 break;
1474         }
1475
1476         /* Set the default values for the Tx Inter Packet Gap timer */
1477
1478         if (hw->media_type == e1000_media_type_fiber ||
1479             hw->media_type == e1000_media_type_internal_serdes)
1480                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1481         else
1482                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1483
1484         switch (hw->mac_type) {
1485         case e1000_82542_rev2_0:
1486         case e1000_82542_rev2_1:
1487                 tipg = DEFAULT_82542_TIPG_IPGT;
1488                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1489                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1490                 break;
1491         case e1000_80003es2lan:
1492                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1493                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1494                 break;
1495         default:
1496                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1497                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1498                 break;
1499         }
1500         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1501         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1502         E1000_WRITE_REG(hw, TIPG, tipg);
1503
1504         /* Set the Tx Interrupt Delay register */
1505
1506         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1507         if (hw->mac_type >= e1000_82540)
1508                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1509
1510         /* Program the Transmit Control Register */
1511
1512         tctl = E1000_READ_REG(hw, TCTL);
1513
1514         tctl &= ~E1000_TCTL_CT;
1515         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1516                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1517
1518 #ifdef DISABLE_MULR
1519         /* disable Multiple Reads for debugging */
1520         tctl &= ~E1000_TCTL_MULR;
1521 #endif
1522
1523         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1524                 tarc = E1000_READ_REG(hw, TARC0);
1525                 tarc |= ((1 << 25) | (1 << 21));
1526                 E1000_WRITE_REG(hw, TARC0, tarc);
1527                 tarc = E1000_READ_REG(hw, TARC1);
1528                 tarc |= (1 << 25);
1529                 if (tctl & E1000_TCTL_MULR)
1530                         tarc &= ~(1 << 28);
1531                 else
1532                         tarc |= (1 << 28);
1533                 E1000_WRITE_REG(hw, TARC1, tarc);
1534         } else if (hw->mac_type == e1000_80003es2lan) {
1535                 tarc = E1000_READ_REG(hw, TARC0);
1536                 tarc |= 1;
1537                 E1000_WRITE_REG(hw, TARC0, tarc);
1538                 tarc = E1000_READ_REG(hw, TARC1);
1539                 tarc |= 1;
1540                 E1000_WRITE_REG(hw, TARC1, tarc);
1541         }
1542
1543         e1000_config_collision_dist(hw);
1544
1545         /* Setup Transmit Descriptor Settings for eop descriptor */
1546         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1547                 E1000_TXD_CMD_IFCS;
1548
1549         if (hw->mac_type < e1000_82543)
1550                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1551         else
1552                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1553
1554         /* Cache if we're 82544 running in PCI-X because we'll
1555          * need this to apply a workaround later in the send path. */
1556         if (hw->mac_type == e1000_82544 &&
1557             hw->bus_type == e1000_bus_type_pcix)
1558                 adapter->pcix_82544 = 1;
1559
1560         E1000_WRITE_REG(hw, TCTL, tctl);
1561
1562 }
1563
1564 /**
1565  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1566  * @adapter: board private structure
1567  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1568  *
1569  * Returns 0 on success, negative on failure
1570  **/
1571
1572 static int
1573 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1574                          struct e1000_rx_ring *rxdr)
1575 {
1576         struct pci_dev *pdev = adapter->pdev;
1577         int size, desc_len;
1578
1579         size = sizeof(struct e1000_buffer) * rxdr->count;
1580         rxdr->buffer_info = vmalloc(size);
1581         if (!rxdr->buffer_info) {
1582                 DPRINTK(PROBE, ERR,
1583                 "Unable to allocate memory for the receive descriptor ring\n");
1584                 return -ENOMEM;
1585         }
1586         memset(rxdr->buffer_info, 0, size);
1587
1588         size = sizeof(struct e1000_ps_page) * rxdr->count;
1589         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1590         if (!rxdr->ps_page) {
1591                 vfree(rxdr->buffer_info);
1592                 DPRINTK(PROBE, ERR,
1593                 "Unable to allocate memory for the receive descriptor ring\n");
1594                 return -ENOMEM;
1595         }
1596         memset(rxdr->ps_page, 0, size);
1597
1598         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1599         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1600         if (!rxdr->ps_page_dma) {
1601                 vfree(rxdr->buffer_info);
1602                 kfree(rxdr->ps_page);
1603                 DPRINTK(PROBE, ERR,
1604                 "Unable to allocate memory for the receive descriptor ring\n");
1605                 return -ENOMEM;
1606         }
1607         memset(rxdr->ps_page_dma, 0, size);
1608
1609         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1610                 desc_len = sizeof(struct e1000_rx_desc);
1611         else
1612                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1613
1614         /* Round up to nearest 4K */
1615
1616         rxdr->size = rxdr->count * desc_len;
1617         E1000_ROUNDUP(rxdr->size, 4096);
1618
1619         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1620
1621         if (!rxdr->desc) {
1622                 DPRINTK(PROBE, ERR,
1623                 "Unable to allocate memory for the receive descriptor ring\n");
1624 setup_rx_desc_die:
1625                 vfree(rxdr->buffer_info);
1626                 kfree(rxdr->ps_page);
1627                 kfree(rxdr->ps_page_dma);
1628                 return -ENOMEM;
1629         }
1630
1631         /* Fix for errata 23, can't cross 64kB boundary */
1632         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1633                 void *olddesc = rxdr->desc;
1634                 dma_addr_t olddma = rxdr->dma;
1635                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1636                                      "at %p\n", rxdr->size, rxdr->desc);
1637                 /* Try again, without freeing the previous */
1638                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1639                 /* Failed allocation, critical failure */
1640                 if (!rxdr->desc) {
1641                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1642                         DPRINTK(PROBE, ERR,
1643                                 "Unable to allocate memory "
1644                                 "for the receive descriptor ring\n");
1645                         goto setup_rx_desc_die;
1646                 }
1647
1648                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1649                         /* give up */
1650                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1651                                             rxdr->dma);
1652                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1653                         DPRINTK(PROBE, ERR,
1654                                 "Unable to allocate aligned memory "
1655                                 "for the receive descriptor ring\n");
1656                         goto setup_rx_desc_die;
1657                 } else {
1658                         /* Free old allocation, new allocation was successful */
1659                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1660                 }
1661         }
1662         memset(rxdr->desc, 0, rxdr->size);
1663
1664         rxdr->next_to_clean = 0;
1665         rxdr->next_to_use = 0;
1666
1667         return 0;
1668 }
1669
1670 /**
1671  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1672  *                                (Descriptors) for all queues
1673  * @adapter: board private structure
1674  *
1675  * Return 0 on success, negative on failure
1676  **/
1677
1678 int
1679 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1680 {
1681         int i, err = 0;
1682
1683         for (i = 0; i < adapter->num_rx_queues; i++) {
1684                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1685                 if (err) {
1686                         DPRINTK(PROBE, ERR,
1687                                 "Allocation for Rx Queue %u failed\n", i);
1688                         for (i-- ; i >= 0; i--)
1689                                 e1000_free_rx_resources(adapter,
1690                                                         &adapter->rx_ring[i]);
1691                         break;
1692                 }
1693         }
1694
1695         return err;
1696 }
1697
1698 /**
1699  * e1000_setup_rctl - configure the receive control registers
1700  * @adapter: Board private structure
1701  **/
1702 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1703                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1704 static void
1705 e1000_setup_rctl(struct e1000_adapter *adapter)
1706 {
1707         uint32_t rctl, rfctl;
1708         uint32_t psrctl = 0;
1709 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1710         uint32_t pages = 0;
1711 #endif
1712
1713         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1714
1715         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1716
1717         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1718                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1719                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1720
1721         if (adapter->hw.tbi_compatibility_on == 1)
1722                 rctl |= E1000_RCTL_SBP;
1723         else
1724                 rctl &= ~E1000_RCTL_SBP;
1725
1726         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1727                 rctl &= ~E1000_RCTL_LPE;
1728         else
1729                 rctl |= E1000_RCTL_LPE;
1730
1731         /* Setup buffer sizes */
1732         rctl &= ~E1000_RCTL_SZ_4096;
1733         rctl |= E1000_RCTL_BSEX;
1734         switch (adapter->rx_buffer_len) {
1735                 case E1000_RXBUFFER_256:
1736                         rctl |= E1000_RCTL_SZ_256;
1737                         rctl &= ~E1000_RCTL_BSEX;
1738                         break;
1739                 case E1000_RXBUFFER_512:
1740                         rctl |= E1000_RCTL_SZ_512;
1741                         rctl &= ~E1000_RCTL_BSEX;
1742                         break;
1743                 case E1000_RXBUFFER_1024:
1744                         rctl |= E1000_RCTL_SZ_1024;
1745                         rctl &= ~E1000_RCTL_BSEX;
1746                         break;
1747                 case E1000_RXBUFFER_2048:
1748                 default:
1749                         rctl |= E1000_RCTL_SZ_2048;
1750                         rctl &= ~E1000_RCTL_BSEX;
1751                         break;
1752                 case E1000_RXBUFFER_4096:
1753                         rctl |= E1000_RCTL_SZ_4096;
1754                         break;
1755                 case E1000_RXBUFFER_8192:
1756                         rctl |= E1000_RCTL_SZ_8192;
1757                         break;
1758                 case E1000_RXBUFFER_16384:
1759                         rctl |= E1000_RCTL_SZ_16384;
1760                         break;
1761         }
1762
1763 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1764         /* 82571 and greater support packet-split where the protocol
1765          * header is placed in skb->data and the packet data is
1766          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1767          * In the case of a non-split, skb->data is linearly filled,
1768          * followed by the page buffers.  Therefore, skb->data is
1769          * sized to hold the largest protocol header.
1770          */
1771         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1772         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1773             PAGE_SIZE <= 16384)
1774                 adapter->rx_ps_pages = pages;
1775         else
1776                 adapter->rx_ps_pages = 0;
1777 #endif
1778         if (adapter->rx_ps_pages) {
1779                 /* Configure extra packet-split registers */
1780                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1781                 rfctl |= E1000_RFCTL_EXTEN;
1782                 /* disable IPv6 packet split support */
1783                 rfctl |= E1000_RFCTL_IPV6_DIS;
1784                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1785
1786                 rctl |= E1000_RCTL_DTYP_PS;
1787
1788                 psrctl |= adapter->rx_ps_bsize0 >>
1789                         E1000_PSRCTL_BSIZE0_SHIFT;
1790
1791                 switch (adapter->rx_ps_pages) {
1792                 case 3:
1793                         psrctl |= PAGE_SIZE <<
1794                                 E1000_PSRCTL_BSIZE3_SHIFT;
1795                 case 2:
1796                         psrctl |= PAGE_SIZE <<
1797                                 E1000_PSRCTL_BSIZE2_SHIFT;
1798                 case 1:
1799                         psrctl |= PAGE_SIZE >>
1800                                 E1000_PSRCTL_BSIZE1_SHIFT;
1801                         break;
1802                 }
1803
1804                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1805         }
1806
1807         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1808 }
1809
1810 /**
1811  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1812  * @adapter: board private structure
1813  *
1814  * Configure the Rx unit of the MAC after a reset.
1815  **/
1816
1817 static void
1818 e1000_configure_rx(struct e1000_adapter *adapter)
1819 {
1820         uint64_t rdba;
1821         struct e1000_hw *hw = &adapter->hw;
1822         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1823
1824         if (adapter->rx_ps_pages) {
1825                 /* this is a 32 byte descriptor */
1826                 rdlen = adapter->rx_ring[0].count *
1827                         sizeof(union e1000_rx_desc_packet_split);
1828                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1829                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1830         } else {
1831                 rdlen = adapter->rx_ring[0].count *
1832                         sizeof(struct e1000_rx_desc);
1833                 adapter->clean_rx = e1000_clean_rx_irq;
1834                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1835         }
1836
1837         /* disable receives while setting up the descriptors */
1838         rctl = E1000_READ_REG(hw, RCTL);
1839         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1840
1841         /* set the Receive Delay Timer Register */
1842         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1843
1844         if (hw->mac_type >= e1000_82540) {
1845                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1846                 if (adapter->itr > 1)
1847                         E1000_WRITE_REG(hw, ITR,
1848                                 1000000000 / (adapter->itr * 256));
1849         }
1850
1851         if (hw->mac_type >= e1000_82571) {
1852                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1853                 /* Reset delay timers after every interrupt */
1854                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1855 #ifdef CONFIG_E1000_NAPI
1856                 /* Auto-Mask interrupts upon ICR read. */
1857                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1858 #endif
1859                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1860                 E1000_WRITE_REG(hw, IAM, ~0);
1861                 E1000_WRITE_FLUSH(hw);
1862         }
1863
1864         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1865          * the Base and Length of the Rx Descriptor Ring */
1866         switch (adapter->num_rx_queues) {
1867         case 1:
1868         default:
1869                 rdba = adapter->rx_ring[0].dma;
1870                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1871                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1872                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1873                 E1000_WRITE_REG(hw, RDT, 0);
1874                 E1000_WRITE_REG(hw, RDH, 0);
1875                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1876                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1877                 break;
1878         }
1879
1880         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1881         if (hw->mac_type >= e1000_82543) {
1882                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1883                 if (adapter->rx_csum == TRUE) {
1884                         rxcsum |= E1000_RXCSUM_TUOFL;
1885
1886                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1887                          * Must be used in conjunction with packet-split. */
1888                         if ((hw->mac_type >= e1000_82571) &&
1889                             (adapter->rx_ps_pages)) {
1890                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1891                         }
1892                 } else {
1893                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1894                         /* don't need to clear IPPCSE as it defaults to 0 */
1895                 }
1896                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1897         }
1898
1899         /* Enable Receives */
1900         E1000_WRITE_REG(hw, RCTL, rctl);
1901 }
1902
1903 /**
1904  * e1000_free_tx_resources - Free Tx Resources per Queue
1905  * @adapter: board private structure
1906  * @tx_ring: Tx descriptor ring for a specific queue
1907  *
1908  * Free all transmit software resources
1909  **/
1910
1911 static void
1912 e1000_free_tx_resources(struct e1000_adapter *adapter,
1913                         struct e1000_tx_ring *tx_ring)
1914 {
1915         struct pci_dev *pdev = adapter->pdev;
1916
1917         e1000_clean_tx_ring(adapter, tx_ring);
1918
1919         vfree(tx_ring->buffer_info);
1920         tx_ring->buffer_info = NULL;
1921
1922         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1923
1924         tx_ring->desc = NULL;
1925 }
1926
1927 /**
1928  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1929  * @adapter: board private structure
1930  *
1931  * Free all transmit software resources
1932  **/
1933
1934 void
1935 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1936 {
1937         int i;
1938
1939         for (i = 0; i < adapter->num_tx_queues; i++)
1940                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1941 }
1942
1943 static void
1944 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1945                         struct e1000_buffer *buffer_info)
1946 {
1947         if (buffer_info->dma) {
1948                 pci_unmap_page(adapter->pdev,
1949                                 buffer_info->dma,
1950                                 buffer_info->length,
1951                                 PCI_DMA_TODEVICE);
1952         }
1953         if (buffer_info->skb)
1954                 dev_kfree_skb_any(buffer_info->skb);
1955         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1956 }
1957
1958 /**
1959  * e1000_clean_tx_ring - Free Tx Buffers
1960  * @adapter: board private structure
1961  * @tx_ring: ring to be cleaned
1962  **/
1963
1964 static void
1965 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1966                     struct e1000_tx_ring *tx_ring)
1967 {
1968         struct e1000_buffer *buffer_info;
1969         unsigned long size;
1970         unsigned int i;
1971
1972         /* Free all the Tx ring sk_buffs */
1973
1974         for (i = 0; i < tx_ring->count; i++) {
1975                 buffer_info = &tx_ring->buffer_info[i];
1976                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1977         }
1978
1979         size = sizeof(struct e1000_buffer) * tx_ring->count;
1980         memset(tx_ring->buffer_info, 0, size);
1981
1982         /* Zero out the descriptor ring */
1983
1984         memset(tx_ring->desc, 0, tx_ring->size);
1985
1986         tx_ring->next_to_use = 0;
1987         tx_ring->next_to_clean = 0;
1988         tx_ring->last_tx_tso = 0;
1989
1990         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1991         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1992 }
1993
1994 /**
1995  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1996  * @adapter: board private structure
1997  **/
1998
1999 static void
2000 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2001 {
2002         int i;
2003
2004         for (i = 0; i < adapter->num_tx_queues; i++)
2005                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2006 }
2007
2008 /**
2009  * e1000_free_rx_resources - Free Rx Resources
2010  * @adapter: board private structure
2011  * @rx_ring: ring to clean the resources from
2012  *
2013  * Free all receive software resources
2014  **/
2015
2016 static void
2017 e1000_free_rx_resources(struct e1000_adapter *adapter,
2018                         struct e1000_rx_ring *rx_ring)
2019 {
2020         struct pci_dev *pdev = adapter->pdev;
2021
2022         e1000_clean_rx_ring(adapter, rx_ring);
2023
2024         vfree(rx_ring->buffer_info);
2025         rx_ring->buffer_info = NULL;
2026         kfree(rx_ring->ps_page);
2027         rx_ring->ps_page = NULL;
2028         kfree(rx_ring->ps_page_dma);
2029         rx_ring->ps_page_dma = NULL;
2030
2031         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2032
2033         rx_ring->desc = NULL;
2034 }
2035
2036 /**
2037  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2038  * @adapter: board private structure
2039  *
2040  * Free all receive software resources
2041  **/
2042
2043 void
2044 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2045 {
2046         int i;
2047
2048         for (i = 0; i < adapter->num_rx_queues; i++)
2049                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2050 }
2051
2052 /**
2053  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2054  * @adapter: board private structure
2055  * @rx_ring: ring to free buffers from
2056  **/
2057
2058 static void
2059 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2060                     struct e1000_rx_ring *rx_ring)
2061 {
2062         struct e1000_buffer *buffer_info;
2063         struct e1000_ps_page *ps_page;
2064         struct e1000_ps_page_dma *ps_page_dma;
2065         struct pci_dev *pdev = adapter->pdev;
2066         unsigned long size;
2067         unsigned int i, j;
2068
2069         /* Free all the Rx ring sk_buffs */
2070         for (i = 0; i < rx_ring->count; i++) {
2071                 buffer_info = &rx_ring->buffer_info[i];
2072                 if (buffer_info->skb) {
2073                         pci_unmap_single(pdev,
2074                                          buffer_info->dma,
2075                                          buffer_info->length,
2076                                          PCI_DMA_FROMDEVICE);
2077
2078                         dev_kfree_skb(buffer_info->skb);
2079                         buffer_info->skb = NULL;
2080                 }
2081                 ps_page = &rx_ring->ps_page[i];
2082                 ps_page_dma = &rx_ring->ps_page_dma[i];
2083                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2084                         if (!ps_page->ps_page[j]) break;
2085                         pci_unmap_page(pdev,
2086                                        ps_page_dma->ps_page_dma[j],
2087                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2088                         ps_page_dma->ps_page_dma[j] = 0;
2089                         put_page(ps_page->ps_page[j]);
2090                         ps_page->ps_page[j] = NULL;
2091                 }
2092         }
2093
2094         size = sizeof(struct e1000_buffer) * rx_ring->count;
2095         memset(rx_ring->buffer_info, 0, size);
2096         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2097         memset(rx_ring->ps_page, 0, size);
2098         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2099         memset(rx_ring->ps_page_dma, 0, size);
2100
2101         /* Zero out the descriptor ring */
2102
2103         memset(rx_ring->desc, 0, rx_ring->size);
2104
2105         rx_ring->next_to_clean = 0;
2106         rx_ring->next_to_use = 0;
2107
2108         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2109         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2110 }
2111
2112 /**
2113  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2114  * @adapter: board private structure
2115  **/
2116
2117 static void
2118 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2119 {
2120         int i;
2121
2122         for (i = 0; i < adapter->num_rx_queues; i++)
2123                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2124 }
2125
2126 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2127  * and memory write and invalidate disabled for certain operations
2128  */
2129 static void
2130 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2131 {
2132         struct net_device *netdev = adapter->netdev;
2133         uint32_t rctl;
2134
2135         e1000_pci_clear_mwi(&adapter->hw);
2136
2137         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2138         rctl |= E1000_RCTL_RST;
2139         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2140         E1000_WRITE_FLUSH(&adapter->hw);
2141         mdelay(5);
2142
2143         if (netif_running(netdev))
2144                 e1000_clean_all_rx_rings(adapter);
2145 }
2146
2147 static void
2148 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2149 {
2150         struct net_device *netdev = adapter->netdev;
2151         uint32_t rctl;
2152
2153         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2154         rctl &= ~E1000_RCTL_RST;
2155         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2156         E1000_WRITE_FLUSH(&adapter->hw);
2157         mdelay(5);
2158
2159         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2160                 e1000_pci_set_mwi(&adapter->hw);
2161
2162         if (netif_running(netdev)) {
2163                 /* No need to loop, because 82542 supports only 1 queue */
2164                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2165                 e1000_configure_rx(adapter);
2166                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2167         }
2168 }
2169
2170 /**
2171  * e1000_set_mac - Change the Ethernet Address of the NIC
2172  * @netdev: network interface device structure
2173  * @p: pointer to an address structure
2174  *
2175  * Returns 0 on success, negative on failure
2176  **/
2177
2178 static int
2179 e1000_set_mac(struct net_device *netdev, void *p)
2180 {
2181         struct e1000_adapter *adapter = netdev_priv(netdev);
2182         struct sockaddr *addr = p;
2183
2184         if (!is_valid_ether_addr(addr->sa_data))
2185                 return -EADDRNOTAVAIL;
2186
2187         /* 82542 2.0 needs to be in reset to write receive address registers */
2188
2189         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2190                 e1000_enter_82542_rst(adapter);
2191
2192         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2193         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2194
2195         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2196
2197         /* With 82571 controllers, LAA may be overwritten (with the default)
2198          * due to controller reset from the other port. */
2199         if (adapter->hw.mac_type == e1000_82571) {
2200                 /* activate the work around */
2201                 adapter->hw.laa_is_present = 1;
2202
2203                 /* Hold a copy of the LAA in RAR[14] This is done so that
2204                  * between the time RAR[0] gets clobbered  and the time it
2205                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2206                  * of the RARs and no incoming packets directed to this port
2207                  * are dropped. Eventaully the LAA will be in RAR[0] and
2208                  * RAR[14] */
2209                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2210                                         E1000_RAR_ENTRIES - 1);
2211         }
2212
2213         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2214                 e1000_leave_82542_rst(adapter);
2215
2216         return 0;
2217 }
2218
2219 /**
2220  * e1000_set_multi - Multicast and Promiscuous mode set
2221  * @netdev: network interface device structure
2222  *
2223  * The set_multi entry point is called whenever the multicast address
2224  * list or the network interface flags are updated.  This routine is
2225  * responsible for configuring the hardware for proper multicast,
2226  * promiscuous mode, and all-multi behavior.
2227  **/
2228
2229 static void
2230 e1000_set_multi(struct net_device *netdev)
2231 {
2232         struct e1000_adapter *adapter = netdev_priv(netdev);
2233         struct e1000_hw *hw = &adapter->hw;
2234         struct dev_mc_list *mc_ptr;
2235         uint32_t rctl;
2236         uint32_t hash_value;
2237         int i, rar_entries = E1000_RAR_ENTRIES;
2238         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2239                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2240                                 E1000_NUM_MTA_REGISTERS;
2241
2242         if (adapter->hw.mac_type == e1000_ich8lan)
2243                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2244
2245         /* reserve RAR[14] for LAA over-write work-around */
2246         if (adapter->hw.mac_type == e1000_82571)
2247                 rar_entries--;
2248
2249         /* Check for Promiscuous and All Multicast modes */
2250
2251         rctl = E1000_READ_REG(hw, RCTL);
2252
2253         if (netdev->flags & IFF_PROMISC) {
2254                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2255         } else if (netdev->flags & IFF_ALLMULTI) {
2256                 rctl |= E1000_RCTL_MPE;
2257                 rctl &= ~E1000_RCTL_UPE;
2258         } else {
2259                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2260         }
2261
2262         E1000_WRITE_REG(hw, RCTL, rctl);
2263
2264         /* 82542 2.0 needs to be in reset to write receive address registers */
2265
2266         if (hw->mac_type == e1000_82542_rev2_0)
2267                 e1000_enter_82542_rst(adapter);
2268
2269         /* load the first 14 multicast address into the exact filters 1-14
2270          * RAR 0 is used for the station MAC adddress
2271          * if there are not 14 addresses, go ahead and clear the filters
2272          * -- with 82571 controllers only 0-13 entries are filled here
2273          */
2274         mc_ptr = netdev->mc_list;
2275
2276         for (i = 1; i < rar_entries; i++) {
2277                 if (mc_ptr) {
2278                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2279                         mc_ptr = mc_ptr->next;
2280                 } else {
2281                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2282                         E1000_WRITE_FLUSH(hw);
2283                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2284                         E1000_WRITE_FLUSH(hw);
2285                 }
2286         }
2287
2288         /* clear the old settings from the multicast hash table */
2289
2290         for (i = 0; i < mta_reg_count; i++) {
2291                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2292                 E1000_WRITE_FLUSH(hw);
2293         }
2294
2295         /* load any remaining addresses into the hash table */
2296
2297         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2298                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2299                 e1000_mta_set(hw, hash_value);
2300         }
2301
2302         if (hw->mac_type == e1000_82542_rev2_0)
2303                 e1000_leave_82542_rst(adapter);
2304 }
2305
2306 /* Need to wait a few seconds after link up to get diagnostic information from
2307  * the phy */
2308
2309 static void
2310 e1000_update_phy_info(unsigned long data)
2311 {
2312         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2313         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2314 }
2315
2316 /**
2317  * e1000_82547_tx_fifo_stall - Timer Call-back
2318  * @data: pointer to adapter cast into an unsigned long
2319  **/
2320
2321 static void
2322 e1000_82547_tx_fifo_stall(unsigned long data)
2323 {
2324         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2325         struct net_device *netdev = adapter->netdev;
2326         uint32_t tctl;
2327
2328         if (atomic_read(&adapter->tx_fifo_stall)) {
2329                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2330                     E1000_READ_REG(&adapter->hw, TDH)) &&
2331                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2332                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2333                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2334                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2335                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2336                         E1000_WRITE_REG(&adapter->hw, TCTL,
2337                                         tctl & ~E1000_TCTL_EN);
2338                         E1000_WRITE_REG(&adapter->hw, TDFT,
2339                                         adapter->tx_head_addr);
2340                         E1000_WRITE_REG(&adapter->hw, TDFH,
2341                                         adapter->tx_head_addr);
2342                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2343                                         adapter->tx_head_addr);
2344                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2345                                         adapter->tx_head_addr);
2346                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2347                         E1000_WRITE_FLUSH(&adapter->hw);
2348
2349                         adapter->tx_fifo_head = 0;
2350                         atomic_set(&adapter->tx_fifo_stall, 0);
2351                         netif_wake_queue(netdev);
2352                 } else {
2353                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2354                 }
2355         }
2356 }
2357
2358 /**
2359  * e1000_watchdog - Timer Call-back
2360  * @data: pointer to adapter cast into an unsigned long
2361  **/
2362 static void
2363 e1000_watchdog(unsigned long data)
2364 {
2365         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2366         struct net_device *netdev = adapter->netdev;
2367         struct e1000_tx_ring *txdr = adapter->tx_ring;
2368         uint32_t link, tctl;
2369         int32_t ret_val;
2370
2371         ret_val = e1000_check_for_link(&adapter->hw);
2372         if ((ret_val == E1000_ERR_PHY) &&
2373             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2374             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2375                 /* See e1000_kumeran_lock_loss_workaround() */
2376                 DPRINTK(LINK, INFO,
2377                         "Gigabit has been disabled, downgrading speed\n");
2378         }
2379         if (adapter->hw.mac_type == e1000_82573) {
2380                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2381                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2382                         e1000_update_mng_vlan(adapter);
2383         }
2384
2385         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2386            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2387                 link = !adapter->hw.serdes_link_down;
2388         else
2389                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2390
2391         if (link) {
2392                 if (!netif_carrier_ok(netdev)) {
2393                         boolean_t txb2b = 1;
2394                         e1000_get_speed_and_duplex(&adapter->hw,
2395                                                    &adapter->link_speed,
2396                                                    &adapter->link_duplex);
2397
2398                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2399                                adapter->link_speed,
2400                                adapter->link_duplex == FULL_DUPLEX ?
2401                                "Full Duplex" : "Half Duplex");
2402
2403                         /* tweak tx_queue_len according to speed/duplex
2404                          * and adjust the timeout factor */
2405                         netdev->tx_queue_len = adapter->tx_queue_len;
2406                         adapter->tx_timeout_factor = 1;
2407                         switch (adapter->link_speed) {
2408                         case SPEED_10:
2409                                 txb2b = 0;
2410                                 netdev->tx_queue_len = 10;
2411                                 adapter->tx_timeout_factor = 8;
2412                                 break;
2413                         case SPEED_100:
2414                                 txb2b = 0;
2415                                 netdev->tx_queue_len = 100;
2416                                 /* maybe add some timeout factor ? */
2417                                 break;
2418                         }
2419
2420                         if ((adapter->hw.mac_type == e1000_82571 ||
2421                              adapter->hw.mac_type == e1000_82572) &&
2422                             txb2b == 0) {
2423 #define SPEED_MODE_BIT (1 << 21)
2424                                 uint32_t tarc0;
2425                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2426                                 tarc0 &= ~SPEED_MODE_BIT;
2427                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2428                         }
2429
2430 #ifdef NETIF_F_TSO
2431                         /* disable TSO for pcie and 10/100 speeds, to avoid
2432                          * some hardware issues */
2433                         if (!adapter->tso_force &&
2434                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2435                                 switch (adapter->link_speed) {
2436                                 case SPEED_10:
2437                                 case SPEED_100:
2438                                         DPRINTK(PROBE,INFO,
2439                                         "10/100 speed: disabling TSO\n");
2440                                         netdev->features &= ~NETIF_F_TSO;
2441                                         break;
2442                                 case SPEED_1000:
2443                                         netdev->features |= NETIF_F_TSO;
2444                                         break;
2445                                 default:
2446                                         /* oops */
2447                                         break;
2448                                 }
2449                         }
2450 #endif
2451
2452                         /* enable transmits in the hardware, need to do this
2453                          * after setting TARC0 */
2454                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2455                         tctl |= E1000_TCTL_EN;
2456                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2457
2458                         netif_carrier_on(netdev);
2459                         netif_wake_queue(netdev);
2460                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2461                         adapter->smartspeed = 0;
2462                 }
2463         } else {
2464                 if (netif_carrier_ok(netdev)) {
2465                         adapter->link_speed = 0;
2466                         adapter->link_duplex = 0;
2467                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2468                         netif_carrier_off(netdev);
2469                         netif_stop_queue(netdev);
2470                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2471
2472                         /* 80003ES2LAN workaround--
2473                          * For packet buffer work-around on link down event;
2474                          * disable receives in the ISR and
2475                          * reset device here in the watchdog
2476                          */
2477                         if (adapter->hw.mac_type == e1000_80003es2lan)
2478                                 /* reset device */
2479                                 schedule_work(&adapter->reset_task);
2480                 }
2481
2482                 e1000_smartspeed(adapter);
2483         }
2484
2485         e1000_update_stats(adapter);
2486
2487         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2488         adapter->tpt_old = adapter->stats.tpt;
2489         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2490         adapter->colc_old = adapter->stats.colc;
2491
2492         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2493         adapter->gorcl_old = adapter->stats.gorcl;
2494         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2495         adapter->gotcl_old = adapter->stats.gotcl;
2496
2497         e1000_update_adaptive(&adapter->hw);
2498
2499         if (!netif_carrier_ok(netdev)) {
2500                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2501                         /* We've lost link, so the controller stops DMA,
2502                          * but we've got queued Tx work that's never going
2503                          * to get done, so reset controller to flush Tx.
2504                          * (Do the reset outside of interrupt context). */
2505                         adapter->tx_timeout_count++;
2506                         schedule_work(&adapter->reset_task);
2507                 }
2508         }
2509
2510         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2511         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2512                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2513                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2514                  * else is between 2000-8000. */
2515                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2516                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2517                         adapter->gotcl - adapter->gorcl :
2518                         adapter->gorcl - adapter->gotcl) / 10000;
2519                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2520                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2521         }
2522
2523         /* Cause software interrupt to ensure rx ring is cleaned */
2524         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2525
2526         /* Force detection of hung controller every watchdog period */
2527         adapter->detect_tx_hung = TRUE;
2528
2529         /* With 82571 controllers, LAA may be overwritten due to controller
2530          * reset from the other port. Set the appropriate LAA in RAR[0] */
2531         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2532                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2533
2534         /* Reset the timer */
2535         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2536 }
2537
2538 #define E1000_TX_FLAGS_CSUM             0x00000001
2539 #define E1000_TX_FLAGS_VLAN             0x00000002
2540 #define E1000_TX_FLAGS_TSO              0x00000004
2541 #define E1000_TX_FLAGS_IPV4             0x00000008
2542 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2543 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2544
2545 static int
2546 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2547           struct sk_buff *skb)
2548 {
2549 #ifdef NETIF_F_TSO
2550         struct e1000_context_desc *context_desc;
2551         struct e1000_buffer *buffer_info;
2552         unsigned int i;
2553         uint32_t cmd_length = 0;
2554         uint16_t ipcse = 0, tucse, mss;
2555         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2556         int err;
2557
2558         if (skb_is_gso(skb)) {
2559                 if (skb_header_cloned(skb)) {
2560                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2561                         if (err)
2562                                 return err;
2563                 }
2564
2565                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2566                 mss = skb_shinfo(skb)->gso_size;
2567                 if (skb->protocol == htons(ETH_P_IP)) {
2568                         skb->nh.iph->tot_len = 0;
2569                         skb->nh.iph->check = 0;
2570                         skb->h.th->check =
2571                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2572                                                    skb->nh.iph->daddr,
2573                                                    0,
2574                                                    IPPROTO_TCP,
2575                                                    0);
2576                         cmd_length = E1000_TXD_CMD_IP;
2577                         ipcse = skb->h.raw - skb->data - 1;
2578 #ifdef NETIF_F_TSO_IPV6
2579                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2580                         skb->nh.ipv6h->payload_len = 0;
2581                         skb->h.th->check =
2582                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2583                                                  &skb->nh.ipv6h->daddr,
2584                                                  0,
2585                                                  IPPROTO_TCP,
2586                                                  0);
2587                         ipcse = 0;
2588 #endif
2589                 }
2590                 ipcss = skb->nh.raw - skb->data;
2591                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2592                 tucss = skb->h.raw - skb->data;
2593                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2594                 tucse = 0;
2595
2596                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2597                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2598
2599                 i = tx_ring->next_to_use;
2600                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2601                 buffer_info = &tx_ring->buffer_info[i];
2602
2603                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2604                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2605                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2606                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2607                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2608                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2609                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2610                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2611                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2612
2613                 buffer_info->time_stamp = jiffies;
2614
2615                 if (++i == tx_ring->count) i = 0;
2616                 tx_ring->next_to_use = i;
2617
2618                 return TRUE;
2619         }
2620 #endif
2621
2622         return FALSE;
2623 }
2624
2625 static boolean_t
2626 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2627               struct sk_buff *skb)
2628 {
2629         struct e1000_context_desc *context_desc;
2630         struct e1000_buffer *buffer_info;
2631         unsigned int i;
2632         uint8_t css;
2633
2634         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2635                 css = skb->h.raw - skb->data;
2636
2637                 i = tx_ring->next_to_use;
2638                 buffer_info = &tx_ring->buffer_info[i];
2639                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2640
2641                 context_desc->upper_setup.tcp_fields.tucss = css;
2642                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2643                 context_desc->upper_setup.tcp_fields.tucse = 0;
2644                 context_desc->tcp_seg_setup.data = 0;
2645                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2646
2647                 buffer_info->time_stamp = jiffies;
2648
2649                 if (unlikely(++i == tx_ring->count)) i = 0;
2650                 tx_ring->next_to_use = i;
2651
2652                 return TRUE;
2653         }
2654
2655         return FALSE;
2656 }
2657
2658 #define E1000_MAX_TXD_PWR       12
2659 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2660
2661 static int
2662 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2663              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2664              unsigned int nr_frags, unsigned int mss)
2665 {
2666         struct e1000_buffer *buffer_info;
2667         unsigned int len = skb->len;
2668         unsigned int offset = 0, size, count = 0, i;
2669         unsigned int f;
2670         len -= skb->data_len;
2671
2672         i = tx_ring->next_to_use;
2673
2674         while (len) {
2675                 buffer_info = &tx_ring->buffer_info[i];
2676                 size = min(len, max_per_txd);
2677 #ifdef NETIF_F_TSO
2678                 /* Workaround for Controller erratum --
2679                  * descriptor for non-tso packet in a linear SKB that follows a
2680                  * tso gets written back prematurely before the data is fully
2681                  * DMA'd to the controller */
2682                 if (!skb->data_len && tx_ring->last_tx_tso &&
2683                     !skb_is_gso(skb)) {
2684                         tx_ring->last_tx_tso = 0;
2685                         size -= 4;
2686                 }
2687
2688                 /* Workaround for premature desc write-backs
2689                  * in TSO mode.  Append 4-byte sentinel desc */
2690                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2691                         size -= 4;
2692 #endif
2693                 /* work-around for errata 10 and it applies
2694                  * to all controllers in PCI-X mode
2695                  * The fix is to make sure that the first descriptor of a
2696                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2697                  */
2698                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2699                                 (size > 2015) && count == 0))
2700                         size = 2015;
2701
2702                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2703                  * terminating buffers within evenly-aligned dwords. */
2704                 if (unlikely(adapter->pcix_82544 &&
2705                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2706                    size > 4))
2707                         size -= 4;
2708
2709                 buffer_info->length = size;
2710                 buffer_info->dma =
2711                         pci_map_single(adapter->pdev,
2712                                 skb->data + offset,
2713                                 size,
2714                                 PCI_DMA_TODEVICE);
2715                 buffer_info->time_stamp = jiffies;
2716
2717                 len -= size;
2718                 offset += size;
2719                 count++;
2720                 if (unlikely(++i == tx_ring->count)) i = 0;
2721         }
2722
2723         for (f = 0; f < nr_frags; f++) {
2724                 struct skb_frag_struct *frag;
2725
2726                 frag = &skb_shinfo(skb)->frags[f];
2727                 len = frag->size;
2728                 offset = frag->page_offset;
2729
2730                 while (len) {
2731                         buffer_info = &tx_ring->buffer_info[i];
2732                         size = min(len, max_per_txd);
2733 #ifdef NETIF_F_TSO
2734                         /* Workaround for premature desc write-backs
2735                          * in TSO mode.  Append 4-byte sentinel desc */
2736                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2737                                 size -= 4;
2738 #endif
2739                         /* Workaround for potential 82544 hang in PCI-X.
2740                          * Avoid terminating buffers within evenly-aligned
2741                          * dwords. */
2742                         if (unlikely(adapter->pcix_82544 &&
2743                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2744                            size > 4))
2745                                 size -= 4;
2746
2747                         buffer_info->length = size;
2748                         buffer_info->dma =
2749                                 pci_map_page(adapter->pdev,
2750                                         frag->page,
2751                                         offset,
2752                                         size,
2753                                         PCI_DMA_TODEVICE);
2754                         buffer_info->time_stamp = jiffies;
2755
2756                         len -= size;
2757                         offset += size;
2758                         count++;
2759                         if (unlikely(++i == tx_ring->count)) i = 0;
2760                 }
2761         }
2762
2763         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2764         tx_ring->buffer_info[i].skb = skb;
2765         tx_ring->buffer_info[first].next_to_watch = i;
2766
2767         return count;
2768 }
2769
2770 static void
2771 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2772                int tx_flags, int count)
2773 {
2774         struct e1000_tx_desc *tx_desc = NULL;
2775         struct e1000_buffer *buffer_info;
2776         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2777         unsigned int i;
2778
2779         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2780                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2781                              E1000_TXD_CMD_TSE;
2782                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2783
2784                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2785                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2786         }
2787
2788         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2789                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2790                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2791         }
2792
2793         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2794                 txd_lower |= E1000_TXD_CMD_VLE;
2795                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2796         }
2797
2798         i = tx_ring->next_to_use;
2799
2800         while (count--) {
2801                 buffer_info = &tx_ring->buffer_info[i];
2802                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2803                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2804                 tx_desc->lower.data =
2805                         cpu_to_le32(txd_lower | buffer_info->length);
2806                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2807                 if (unlikely(++i == tx_ring->count)) i = 0;
2808         }
2809
2810         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2811
2812         /* Force memory writes to complete before letting h/w
2813          * know there are new descriptors to fetch.  (Only
2814          * applicable for weak-ordered memory model archs,
2815          * such as IA-64). */
2816         wmb();
2817
2818         tx_ring->next_to_use = i;
2819         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2820 }
2821
2822 /**
2823  * 82547 workaround to avoid controller hang in half-duplex environment.
2824  * The workaround is to avoid queuing a large packet that would span
2825  * the internal Tx FIFO ring boundary by notifying the stack to resend
2826  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2827  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2828  * to the beginning of the Tx FIFO.
2829  **/
2830
2831 #define E1000_FIFO_HDR                  0x10
2832 #define E1000_82547_PAD_LEN             0x3E0
2833
2834 static int
2835 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2836 {
2837         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2838         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2839
2840         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2841
2842         if (adapter->link_duplex != HALF_DUPLEX)
2843                 goto no_fifo_stall_required;
2844
2845         if (atomic_read(&adapter->tx_fifo_stall))
2846                 return 1;
2847
2848         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2849                 atomic_set(&adapter->tx_fifo_stall, 1);
2850                 return 1;
2851         }
2852
2853 no_fifo_stall_required:
2854         adapter->tx_fifo_head += skb_fifo_len;
2855         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2856                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2857         return 0;
2858 }
2859
2860 #define MINIMUM_DHCP_PACKET_SIZE 282
2861 static int
2862 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2863 {
2864         struct e1000_hw *hw =  &adapter->hw;
2865         uint16_t length, offset;
2866         if (vlan_tx_tag_present(skb)) {
2867                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2868                         ( adapter->hw.mng_cookie.status &
2869                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2870                         return 0;
2871         }
2872         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2873                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2874                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2875                         const struct iphdr *ip =
2876                                 (struct iphdr *)((uint8_t *)skb->data+14);
2877                         if (IPPROTO_UDP == ip->protocol) {
2878                                 struct udphdr *udp =
2879                                         (struct udphdr *)((uint8_t *)ip +
2880                                                 (ip->ihl << 2));
2881                                 if (ntohs(udp->dest) == 67) {
2882                                         offset = (uint8_t *)udp + 8 - skb->data;
2883                                         length = skb->len - offset;
2884
2885                                         return e1000_mng_write_dhcp_info(hw,
2886                                                         (uint8_t *)udp + 8,
2887                                                         length);
2888                                 }
2889                         }
2890                 }
2891         }
2892         return 0;
2893 }
2894
2895 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2896 static int
2897 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2898 {
2899         struct e1000_adapter *adapter = netdev_priv(netdev);
2900         struct e1000_tx_ring *tx_ring;
2901         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2902         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2903         unsigned int tx_flags = 0;
2904         unsigned int len = skb->len;
2905         unsigned long flags;
2906         unsigned int nr_frags = 0;
2907         unsigned int mss = 0;
2908         int count = 0;
2909         int tso;
2910         unsigned int f;
2911         len -= skb->data_len;
2912
2913         tx_ring = adapter->tx_ring;
2914
2915         if (unlikely(skb->len <= 0)) {
2916                 dev_kfree_skb_any(skb);
2917                 return NETDEV_TX_OK;
2918         }
2919
2920 #ifdef NETIF_F_TSO
2921         mss = skb_shinfo(skb)->gso_size;
2922         /* The controller does a simple calculation to
2923          * make sure there is enough room in the FIFO before
2924          * initiating the DMA for each buffer.  The calc is:
2925          * 4 = ceil(buffer len/mss).  To make sure we don't
2926          * overrun the FIFO, adjust the max buffer len if mss
2927          * drops. */
2928         if (mss) {
2929                 uint8_t hdr_len;
2930                 max_per_txd = min(mss << 2, max_per_txd);
2931                 max_txd_pwr = fls(max_per_txd) - 1;
2932
2933         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2934          * points to just header, pull a few bytes of payload from
2935          * frags into skb->data */
2936                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2937                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2938                         switch (adapter->hw.mac_type) {
2939                                 unsigned int pull_size;
2940                         case e1000_82571:
2941                         case e1000_82572:
2942                         case e1000_82573:
2943                         case e1000_ich8lan:
2944                                 pull_size = min((unsigned int)4, skb->data_len);
2945                                 if (!__pskb_pull_tail(skb, pull_size)) {
2946                                         DPRINTK(DRV, ERR,
2947                                                 "__pskb_pull_tail failed.\n");
2948                                         dev_kfree_skb_any(skb);
2949                                         return NETDEV_TX_OK;
2950                                 }
2951                                 len = skb->len - skb->data_len;
2952                                 break;
2953                         default:
2954                                 /* do nothing */
2955                                 break;
2956                         }
2957                 }
2958         }
2959
2960         /* reserve a descriptor for the offload context */
2961         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
2962                 count++;
2963         count++;
2964 #else
2965         if (skb->ip_summed == CHECKSUM_PARTIAL)
2966                 count++;
2967 #endif
2968
2969 #ifdef NETIF_F_TSO
2970         /* Controller Erratum workaround */
2971         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
2972                 count++;
2973 #endif
2974
2975         count += TXD_USE_COUNT(len, max_txd_pwr);
2976
2977         if (adapter->pcix_82544)
2978                 count++;
2979
2980         /* work-around for errata 10 and it applies to all controllers
2981          * in PCI-X mode, so add one more descriptor to the count
2982          */
2983         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2984                         (len > 2015)))
2985                 count++;
2986
2987         nr_frags = skb_shinfo(skb)->nr_frags;
2988         for (f = 0; f < nr_frags; f++)
2989                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2990                                        max_txd_pwr);
2991         if (adapter->pcix_82544)
2992                 count += nr_frags;
2993
2994
2995         if (adapter->hw.tx_pkt_filtering &&
2996             (adapter->hw.mac_type == e1000_82573))
2997                 e1000_transfer_dhcp_info(adapter, skb);
2998
2999         local_irq_save(flags);
3000         if (!spin_trylock(&tx_ring->tx_lock)) {
3001                 /* Collision - tell upper layer to requeue */
3002                 local_irq_restore(flags);
3003                 return NETDEV_TX_LOCKED;
3004         }
3005
3006         /* need: count + 2 desc gap to keep tail from touching
3007          * head, otherwise try next time */
3008         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
3009                 netif_stop_queue(netdev);
3010                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3011                 return NETDEV_TX_BUSY;
3012         }
3013
3014         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3015                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3016                         netif_stop_queue(netdev);
3017                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
3018                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3019                         return NETDEV_TX_BUSY;
3020                 }
3021         }
3022
3023         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3024                 tx_flags |= E1000_TX_FLAGS_VLAN;
3025                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3026         }
3027
3028         first = tx_ring->next_to_use;
3029
3030         tso = e1000_tso(adapter, tx_ring, skb);
3031         if (tso < 0) {
3032                 dev_kfree_skb_any(skb);
3033                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3034                 return NETDEV_TX_OK;
3035         }
3036
3037         if (likely(tso)) {
3038                 tx_ring->last_tx_tso = 1;
3039                 tx_flags |= E1000_TX_FLAGS_TSO;
3040         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3041                 tx_flags |= E1000_TX_FLAGS_CSUM;
3042
3043         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3044          * 82571 hardware supports TSO capabilities for IPv6 as well...
3045          * no longer assume, we must. */
3046         if (likely(skb->protocol == htons(ETH_P_IP)))
3047                 tx_flags |= E1000_TX_FLAGS_IPV4;
3048
3049         e1000_tx_queue(adapter, tx_ring, tx_flags,
3050                        e1000_tx_map(adapter, tx_ring, skb, first,
3051                                     max_per_txd, nr_frags, mss));
3052
3053         netdev->trans_start = jiffies;
3054
3055         /* Make sure there is space in the ring for the next send. */
3056         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
3057                 netif_stop_queue(netdev);
3058
3059         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3060         return NETDEV_TX_OK;
3061 }
3062
3063 /**
3064  * e1000_tx_timeout - Respond to a Tx Hang
3065  * @netdev: network interface device structure
3066  **/
3067
3068 static void
3069 e1000_tx_timeout(struct net_device *netdev)
3070 {
3071         struct e1000_adapter *adapter = netdev_priv(netdev);
3072
3073         /* Do the reset outside of interrupt context */
3074         adapter->tx_timeout_count++;
3075         schedule_work(&adapter->reset_task);
3076 }
3077
3078 static void
3079 e1000_reset_task(struct net_device *netdev)
3080 {
3081         struct e1000_adapter *adapter = netdev_priv(netdev);
3082
3083         e1000_reinit_locked(adapter);
3084 }
3085
3086 /**
3087  * e1000_get_stats - Get System Network Statistics
3088  * @netdev: network interface device structure
3089  *
3090  * Returns the address of the device statistics structure.
3091  * The statistics are actually updated from the timer callback.
3092  **/
3093
3094 static struct net_device_stats *
3095 e1000_get_stats(struct net_device *netdev)
3096 {
3097         struct e1000_adapter *adapter = netdev_priv(netdev);
3098
3099         /* only return the current stats */
3100         return &adapter->net_stats;
3101 }
3102
3103 /**
3104  * e1000_change_mtu - Change the Maximum Transfer Unit
3105  * @netdev: network interface device structure
3106  * @new_mtu: new value for maximum frame size
3107  *
3108  * Returns 0 on success, negative on failure
3109  **/
3110
3111 static int
3112 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3113 {
3114         struct e1000_adapter *adapter = netdev_priv(netdev);
3115         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3116         uint16_t eeprom_data = 0;
3117
3118         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3119             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3120                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3121                 return -EINVAL;
3122         }
3123
3124         /* Adapter-specific max frame size limits. */
3125         switch (adapter->hw.mac_type) {
3126         case e1000_undefined ... e1000_82542_rev2_1:
3127         case e1000_ich8lan:
3128                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3129                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3130                         return -EINVAL;
3131                 }
3132                 break;
3133         case e1000_82573:
3134                 /* only enable jumbo frames if ASPM is disabled completely
3135                  * this means both bits must be zero in 0x1A bits 3:2 */
3136                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3137                                   &eeprom_data);
3138                 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3139                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3140                                 DPRINTK(PROBE, ERR,
3141                                         "Jumbo Frames not supported.\n");
3142                                 return -EINVAL;
3143                         }
3144                         break;
3145                 }
3146                 /* fall through to get support */
3147         case e1000_82571:
3148         case e1000_82572:
3149         case e1000_80003es2lan:
3150 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3151                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3152                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3153                         return -EINVAL;
3154                 }
3155                 break;
3156         default:
3157                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3158                 break;
3159         }
3160
3161         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3162          * means we reserve 2 more, this pushes us to allocate from the next
3163          * larger slab size
3164          * i.e. RXBUFFER_2048 --> size-4096 slab */
3165
3166         if (max_frame <= E1000_RXBUFFER_256)
3167                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3168         else if (max_frame <= E1000_RXBUFFER_512)
3169                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3170         else if (max_frame <= E1000_RXBUFFER_1024)
3171                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3172         else if (max_frame <= E1000_RXBUFFER_2048)
3173                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3174         else if (max_frame <= E1000_RXBUFFER_4096)
3175                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3176         else if (max_frame <= E1000_RXBUFFER_8192)
3177                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3178         else if (max_frame <= E1000_RXBUFFER_16384)
3179                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3180
3181         /* adjust allocation if LPE protects us, and we aren't using SBP */
3182         if (!adapter->hw.tbi_compatibility_on &&
3183             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3184              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3185                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3186
3187         netdev->mtu = new_mtu;
3188
3189         if (netif_running(netdev))
3190                 e1000_reinit_locked(adapter);
3191
3192         adapter->hw.max_frame_size = max_frame;
3193
3194         return 0;
3195 }
3196
3197 /**
3198  * e1000_update_stats - Update the board statistics counters
3199  * @adapter: board private structure
3200  **/
3201
3202 void
3203 e1000_update_stats(struct e1000_adapter *adapter)
3204 {
3205         struct e1000_hw *hw = &adapter->hw;
3206         struct pci_dev *pdev = adapter->pdev;
3207         unsigned long flags;
3208         uint16_t phy_tmp;
3209
3210 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3211
3212         /*
3213          * Prevent stats update while adapter is being reset, or if the pci
3214          * connection is down.
3215          */
3216         if (adapter->link_speed == 0)
3217                 return;
3218         if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3219                 return;
3220
3221         spin_lock_irqsave(&adapter->stats_lock, flags);
3222
3223         /* these counters are modified from e1000_adjust_tbi_stats,
3224          * called from the interrupt context, so they must only
3225          * be written while holding adapter->stats_lock
3226          */
3227
3228         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3229         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3230         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3231         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3232         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3233         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3234         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3235
3236         if (adapter->hw.mac_type != e1000_ich8lan) {
3237         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3238         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3239         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3240         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3241         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3242         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3243         }
3244
3245         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3246         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3247         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3248         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3249         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3250         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3251         adapter->stats.dc += E1000_READ_REG(hw, DC);
3252         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3253         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3254         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3255         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3256         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3257         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3258         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3259         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3260         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3261         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3262         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3263         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3264         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3265         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3266         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3267         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3268         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3269         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3270         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3271
3272         if (adapter->hw.mac_type != e1000_ich8lan) {
3273         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3274         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3275         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3276         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3277         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3278         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3279         }
3280
3281         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3282         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3283
3284         /* used for adaptive IFS */
3285
3286         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3287         adapter->stats.tpt += hw->tx_packet_delta;
3288         hw->collision_delta = E1000_READ_REG(hw, COLC);
3289         adapter->stats.colc += hw->collision_delta;
3290
3291         if (hw->mac_type >= e1000_82543) {
3292                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3293                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3294                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3295                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3296                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3297                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3298         }
3299         if (hw->mac_type > e1000_82547_rev_2) {
3300                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3301                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3302
3303                 if (adapter->hw.mac_type != e1000_ich8lan) {
3304                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3305                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3306                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3307                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3308                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3309                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3310                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3311                 }
3312         }
3313
3314         /* Fill out the OS statistics structure */
3315
3316         adapter->net_stats.rx_packets = adapter->stats.gprc;
3317         adapter->net_stats.tx_packets = adapter->stats.gptc;
3318         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3319         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3320         adapter->net_stats.multicast = adapter->stats.mprc;
3321         adapter->net_stats.collisions = adapter->stats.colc;
3322
3323         /* Rx Errors */
3324
3325         /* RLEC on some newer hardware can be incorrect so build
3326         * our own version based on RUC and ROC */
3327         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3328                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3329                 adapter->stats.ruc + adapter->stats.roc +
3330                 adapter->stats.cexterr;
3331         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3332                                               adapter->stats.roc;
3333         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3334         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3335         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3336
3337         /* Tx Errors */
3338
3339         adapter->net_stats.tx_errors = adapter->stats.ecol +
3340                                        adapter->stats.latecol;
3341         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3342         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3343         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3344
3345         /* Tx Dropped needs to be maintained elsewhere */
3346
3347         /* Phy Stats */
3348
3349         if (hw->media_type == e1000_media_type_copper) {
3350                 if ((adapter->link_speed == SPEED_1000) &&
3351                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3352                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3353                         adapter->phy_stats.idle_errors += phy_tmp;
3354                 }
3355
3356                 if ((hw->mac_type <= e1000_82546) &&
3357                    (hw->phy_type == e1000_phy_m88) &&
3358                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3359                         adapter->phy_stats.receive_errors += phy_tmp;
3360         }
3361
3362         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3363 }
3364
3365 /**
3366  * e1000_intr - Interrupt Handler
3367  * @irq: interrupt number
3368  * @data: pointer to a network interface device structure
3369  * @pt_regs: CPU registers structure
3370  **/
3371
3372 static irqreturn_t
3373 e1000_intr(int irq, void *data, struct pt_regs *regs)
3374 {
3375         struct net_device *netdev = data;
3376         struct e1000_adapter *adapter = netdev_priv(netdev);
3377         struct e1000_hw *hw = &adapter->hw;
3378         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3379 #ifndef CONFIG_E1000_NAPI
3380         int i;
3381 #else
3382         /* Interrupt Auto-Mask...upon reading ICR,
3383          * interrupts are masked.  No need for the
3384          * IMC write, but it does mean we should
3385          * account for it ASAP. */
3386         if (likely(hw->mac_type >= e1000_82571))
3387                 atomic_inc(&adapter->irq_sem);
3388 #endif
3389
3390         if (unlikely(!icr)) {
3391 #ifdef CONFIG_E1000_NAPI
3392                 if (hw->mac_type >= e1000_82571)
3393                         e1000_irq_enable(adapter);
3394 #endif
3395                 return IRQ_NONE;  /* Not our interrupt */
3396         }
3397
3398         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3399                 hw->get_link_status = 1;
3400                 /* 80003ES2LAN workaround--
3401                  * For packet buffer work-around on link down event;
3402                  * disable receives here in the ISR and
3403                  * reset adapter in watchdog
3404                  */
3405                 if (netif_carrier_ok(netdev) &&
3406                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3407                         /* disable receives */
3408                         rctl = E1000_READ_REG(hw, RCTL);
3409                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3410                 }
3411                 mod_timer(&adapter->watchdog_timer, jiffies);
3412         }
3413
3414 #ifdef CONFIG_E1000_NAPI
3415         if (unlikely(hw->mac_type < e1000_82571)) {
3416                 atomic_inc(&adapter->irq_sem);
3417                 E1000_WRITE_REG(hw, IMC, ~0);
3418                 E1000_WRITE_FLUSH(hw);
3419         }
3420         if (likely(netif_rx_schedule_prep(netdev)))
3421                 __netif_rx_schedule(netdev);
3422         else
3423                 e1000_irq_enable(adapter);
3424 #else
3425         /* Writing IMC and IMS is needed for 82547.
3426          * Due to Hub Link bus being occupied, an interrupt
3427          * de-assertion message is not able to be sent.
3428          * When an interrupt assertion message is generated later,
3429          * two messages are re-ordered and sent out.
3430          * That causes APIC to think 82547 is in de-assertion
3431          * state, while 82547 is in assertion state, resulting
3432          * in dead lock. Writing IMC forces 82547 into
3433          * de-assertion state.
3434          */
3435         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3436                 atomic_inc(&adapter->irq_sem);
3437                 E1000_WRITE_REG(hw, IMC, ~0);
3438         }
3439
3440         for (i = 0; i < E1000_MAX_INTR; i++)
3441                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3442                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3443                         break;
3444
3445         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3446                 e1000_irq_enable(adapter);
3447
3448 #endif
3449
3450         return IRQ_HANDLED;
3451 }
3452
3453 #ifdef CONFIG_E1000_NAPI
3454 /**
3455  * e1000_clean - NAPI Rx polling callback
3456  * @adapter: board private structure
3457  **/
3458
3459 static int
3460 e1000_clean(struct net_device *poll_dev, int *budget)
3461 {
3462         struct e1000_adapter *adapter;
3463         int work_to_do = min(*budget, poll_dev->quota);
3464         int tx_cleaned = 0, work_done = 0;
3465
3466         /* Must NOT use netdev_priv macro here. */
3467         adapter = poll_dev->priv;
3468
3469         /* Keep link state information with original netdev */
3470         if (!netif_carrier_ok(poll_dev))
3471                 goto quit_polling;
3472
3473         /* e1000_clean is called per-cpu.  This lock protects
3474          * tx_ring[0] from being cleaned by multiple cpus
3475          * simultaneously.  A failure obtaining the lock means
3476          * tx_ring[0] is currently being cleaned anyway. */
3477         if (spin_trylock(&adapter->tx_queue_lock)) {
3478                 tx_cleaned = e1000_clean_tx_irq(adapter,
3479                                                 &adapter->tx_ring[0]);
3480                 spin_unlock(&adapter->tx_queue_lock);
3481         }
3482
3483         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3484                           &work_done, work_to_do);
3485
3486         *budget -= work_done;
3487         poll_dev->quota -= work_done;
3488
3489         /* If no Tx and not enough Rx work done, exit the polling mode */
3490         if ((!tx_cleaned && (work_done == 0)) ||
3491            !netif_running(poll_dev)) {
3492 quit_polling:
3493                 netif_rx_complete(poll_dev);
3494                 e1000_irq_enable(adapter);
3495                 return 0;
3496         }
3497
3498         return 1;
3499 }
3500
3501 #endif
3502 /**
3503  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3504  * @adapter: board private structure
3505  **/
3506
3507 static boolean_t
3508 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3509                    struct e1000_tx_ring *tx_ring)
3510 {
3511         struct net_device *netdev = adapter->netdev;
3512         struct e1000_tx_desc *tx_desc, *eop_desc;
3513         struct e1000_buffer *buffer_info;
3514         unsigned int i, eop;
3515 #ifdef CONFIG_E1000_NAPI
3516         unsigned int count = 0;
3517 #endif
3518         boolean_t cleaned = FALSE;
3519
3520         i = tx_ring->next_to_clean;
3521         eop = tx_ring->buffer_info[i].next_to_watch;
3522         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3523
3524         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3525                 for (cleaned = FALSE; !cleaned; ) {
3526                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3527                         buffer_info = &tx_ring->buffer_info[i];
3528                         cleaned = (i == eop);
3529
3530                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3531                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3532
3533                         if (unlikely(++i == tx_ring->count)) i = 0;
3534                 }
3535
3536
3537                 eop = tx_ring->buffer_info[i].next_to_watch;
3538                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3539 #ifdef CONFIG_E1000_NAPI
3540 #define E1000_TX_WEIGHT 64
3541                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3542                 if (count++ == E1000_TX_WEIGHT) break;
3543 #endif
3544         }
3545
3546         tx_ring->next_to_clean = i;
3547
3548 #define TX_WAKE_THRESHOLD 32
3549         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3550                      netif_carrier_ok(netdev))) {
3551                 spin_lock(&tx_ring->tx_lock);
3552                 if (netif_queue_stopped(netdev) &&
3553                     (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))
3554                         netif_wake_queue(netdev);
3555                 spin_unlock(&tx_ring->tx_lock);
3556         }
3557
3558         if (adapter->detect_tx_hung) {
3559                 /* Detect a transmit hang in hardware, this serializes the
3560                  * check with the clearing of time_stamp and movement of i */
3561                 adapter->detect_tx_hung = FALSE;
3562                 if (tx_ring->buffer_info[eop].dma &&
3563                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3564                                (adapter->tx_timeout_factor * HZ))
3565                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3566                          E1000_STATUS_TXOFF)) {
3567
3568                         /* detected Tx unit hang */
3569                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3570                                         "  Tx Queue             <%lu>\n"
3571                                         "  TDH                  <%x>\n"
3572                                         "  TDT                  <%x>\n"
3573                                         "  next_to_use          <%x>\n"
3574                                         "  next_to_clean        <%x>\n"
3575                                         "buffer_info[next_to_clean]\n"
3576                                         "  time_stamp           <%lx>\n"
3577                                         "  next_to_watch        <%x>\n"
3578                                         "  jiffies              <%lx>\n"
3579                                         "  next_to_watch.status <%x>\n",
3580                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3581                                         sizeof(struct e1000_tx_ring)),
3582                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3583                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3584                                 tx_ring->next_to_use,
3585                                 tx_ring->next_to_clean,
3586                                 tx_ring->buffer_info[eop].time_stamp,
3587                                 eop,
3588                                 jiffies,
3589                                 eop_desc->upper.fields.status);
3590                         netif_stop_queue(netdev);
3591                 }
3592         }
3593         return cleaned;
3594 }
3595
3596 /**
3597  * e1000_rx_checksum - Receive Checksum Offload for 82543
3598  * @adapter:     board private structure
3599  * @status_err:  receive descriptor status and error fields
3600  * @csum:        receive descriptor csum field
3601  * @sk_buff:     socket buffer with received data
3602  **/
3603
3604 static void
3605 e1000_rx_checksum(struct e1000_adapter *adapter,
3606                   uint32_t status_err, uint32_t csum,
3607                   struct sk_buff *skb)
3608 {
3609         uint16_t status = (uint16_t)status_err;
3610         uint8_t errors = (uint8_t)(status_err >> 24);
3611         skb->ip_summed = CHECKSUM_NONE;
3612
3613         /* 82543 or newer only */
3614         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3615         /* Ignore Checksum bit is set */
3616         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3617         /* TCP/UDP checksum error bit is set */
3618         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3619                 /* let the stack verify checksum errors */
3620                 adapter->hw_csum_err++;
3621                 return;
3622         }
3623         /* TCP/UDP Checksum has not been calculated */
3624         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3625                 if (!(status & E1000_RXD_STAT_TCPCS))
3626                         return;
3627         } else {
3628                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3629                         return;
3630         }
3631         /* It must be a TCP or UDP packet with a valid checksum */
3632         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3633                 /* TCP checksum is good */
3634                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3635         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3636                 /* IP fragment with UDP payload */
3637                 /* Hardware complements the payload checksum, so we undo it
3638                  * and then put the value in host order for further stack use.
3639                  */
3640                 csum = ntohl(csum ^ 0xFFFF);
3641                 skb->csum = csum;
3642                 skb->ip_summed = CHECKSUM_COMPLETE;
3643         }
3644         adapter->hw_csum_good++;
3645 }
3646
3647 /**
3648  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3649  * @adapter: board private structure
3650  **/
3651
3652 static boolean_t
3653 #ifdef CONFIG_E1000_NAPI
3654 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3655                    struct e1000_rx_ring *rx_ring,
3656                    int *work_done, int work_to_do)
3657 #else
3658 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3659                    struct e1000_rx_ring *rx_ring)
3660 #endif
3661 {
3662         struct net_device *netdev = adapter->netdev;
3663         struct pci_dev *pdev = adapter->pdev;
3664         struct e1000_rx_desc *rx_desc, *next_rxd;
3665         struct e1000_buffer *buffer_info, *next_buffer;
3666         unsigned long flags;
3667         uint32_t length;
3668         uint8_t last_byte;
3669         unsigned int i;
3670         int cleaned_count = 0;
3671         boolean_t cleaned = FALSE;
3672
3673         i = rx_ring->next_to_clean;
3674         rx_desc = E1000_RX_DESC(*rx_ring, i);
3675         buffer_info = &rx_ring->buffer_info[i];
3676
3677         while (rx_desc->status & E1000_RXD_STAT_DD) {
3678                 struct sk_buff *skb;
3679                 u8 status;
3680 #ifdef CONFIG_E1000_NAPI
3681                 if (*work_done >= work_to_do)
3682                         break;
3683                 (*work_done)++;
3684 #endif
3685                 status = rx_desc->status;
3686                 skb = buffer_info->skb;
3687                 buffer_info->skb = NULL;
3688
3689                 prefetch(skb->data - NET_IP_ALIGN);
3690
3691                 if (++i == rx_ring->count) i = 0;
3692                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3693                 prefetch(next_rxd);
3694
3695                 next_buffer = &rx_ring->buffer_info[i];
3696
3697                 cleaned = TRUE;
3698                 cleaned_count++;
3699                 pci_unmap_single(pdev,
3700                                  buffer_info->dma,
3701                                  buffer_info->length,
3702                                  PCI_DMA_FROMDEVICE);
3703
3704                 length = le16_to_cpu(rx_desc->length);
3705
3706                 /* adjust length to remove Ethernet CRC */
3707                 length -= 4;
3708
3709                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3710                         /* All receives must fit into a single buffer */
3711                         E1000_DBG("%s: Receive packet consumed multiple"
3712                                   " buffers\n", netdev->name);
3713                         /* recycle */
3714                         buffer_info->skb = skb;
3715                         goto next_desc;
3716                 }
3717
3718                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3719                         last_byte = *(skb->data + length - 1);
3720                         if (TBI_ACCEPT(&adapter->hw, status,
3721                                       rx_desc->errors, length, last_byte)) {
3722                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3723                                 e1000_tbi_adjust_stats(&adapter->hw,
3724                                                        &adapter->stats,
3725                                                        length, skb->data);
3726                                 spin_unlock_irqrestore(&adapter->stats_lock,
3727                                                        flags);
3728                                 length--;
3729                         } else {
3730                                 /* recycle */
3731                                 buffer_info->skb = skb;
3732                                 goto next_desc;
3733                         }
3734                 }
3735
3736                 /* code added for copybreak, this should improve
3737                  * performance for small packets with large amounts
3738                  * of reassembly being done in the stack */
3739 #define E1000_CB_LENGTH 256
3740                 if (length < E1000_CB_LENGTH) {
3741                         struct sk_buff *new_skb =
3742                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
3743                         if (new_skb) {
3744                                 skb_reserve(new_skb, NET_IP_ALIGN);
3745                                 memcpy(new_skb->data - NET_IP_ALIGN,
3746                                        skb->data - NET_IP_ALIGN,
3747                                        length + NET_IP_ALIGN);
3748                                 /* save the skb in buffer_info as good */
3749                                 buffer_info->skb = skb;
3750                                 skb = new_skb;
3751                                 skb_put(skb, length);
3752                         }
3753                 } else
3754                         skb_put(skb, length);
3755
3756                 /* end copybreak code */
3757
3758                 /* Receive Checksum Offload */
3759                 e1000_rx_checksum(adapter,
3760                                   (uint32_t)(status) |
3761                                   ((uint32_t)(rx_desc->errors) << 24),
3762                                   le16_to_cpu(rx_desc->csum), skb);
3763
3764                 skb->protocol = eth_type_trans(skb, netdev);
3765 #ifdef CONFIG_E1000_NAPI
3766                 if (unlikely(adapter->vlgrp &&
3767                             (status & E1000_RXD_STAT_VP))) {
3768                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3769                                                  le16_to_cpu(rx_desc->special) &
3770                                                  E1000_RXD_SPC_VLAN_MASK);
3771                 } else {
3772                         netif_receive_skb(skb);
3773                 }
3774 #else /* CONFIG_E1000_NAPI */
3775                 if (unlikely(adapter->vlgrp &&
3776                             (status & E1000_RXD_STAT_VP))) {
3777                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3778                                         le16_to_cpu(rx_desc->special) &
3779                                         E1000_RXD_SPC_VLAN_MASK);
3780                 } else {
3781                         netif_rx(skb);
3782                 }
3783 #endif /* CONFIG_E1000_NAPI */
3784                 netdev->last_rx = jiffies;
3785
3786 next_desc:
3787                 rx_desc->status = 0;
3788
3789                 /* return some buffers to hardware, one at a time is too slow */
3790                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3791                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3792                         cleaned_count = 0;
3793                 }
3794
3795                 /* use prefetched values */
3796                 rx_desc = next_rxd;
3797                 buffer_info = next_buffer;
3798         }
3799         rx_ring->next_to_clean = i;
3800
3801         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3802         if (cleaned_count)
3803                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3804
3805         return cleaned;
3806 }
3807
3808 /**
3809  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3810  * @adapter: board private structure
3811  **/
3812
3813 static boolean_t
3814 #ifdef CONFIG_E1000_NAPI
3815 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3816                       struct e1000_rx_ring *rx_ring,
3817                       int *work_done, int work_to_do)
3818 #else
3819 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3820                       struct e1000_rx_ring *rx_ring)
3821 #endif
3822 {
3823         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3824         struct net_device *netdev = adapter->netdev;
3825         struct pci_dev *pdev = adapter->pdev;
3826         struct e1000_buffer *buffer_info, *next_buffer;
3827         struct e1000_ps_page *ps_page;
3828         struct e1000_ps_page_dma *ps_page_dma;
3829         struct sk_buff *skb;
3830         unsigned int i, j;
3831         uint32_t length, staterr;
3832         int cleaned_count = 0;
3833         boolean_t cleaned = FALSE;
3834
3835         i = rx_ring->next_to_clean;
3836         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3837         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3838         buffer_info = &rx_ring->buffer_info[i];
3839
3840         while (staterr & E1000_RXD_STAT_DD) {
3841                 ps_page = &rx_ring->ps_page[i];
3842                 ps_page_dma = &rx_ring->ps_page_dma[i];
3843 #ifdef CONFIG_E1000_NAPI
3844                 if (unlikely(*work_done >= work_to_do))
3845                         break;
3846                 (*work_done)++;
3847 #endif
3848                 skb = buffer_info->skb;
3849
3850                 /* in the packet split case this is header only */
3851                 prefetch(skb->data - NET_IP_ALIGN);
3852
3853                 if (++i == rx_ring->count) i = 0;
3854                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3855                 prefetch(next_rxd);
3856
3857                 next_buffer = &rx_ring->buffer_info[i];
3858
3859                 cleaned = TRUE;
3860                 cleaned_count++;
3861                 pci_unmap_single(pdev, buffer_info->dma,
3862                                  buffer_info->length,
3863                                  PCI_DMA_FROMDEVICE);
3864
3865                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3866                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3867                                   " the full packet\n", netdev->name);
3868                         dev_kfree_skb_irq(skb);
3869                         goto next_desc;
3870                 }
3871
3872                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3873                         dev_kfree_skb_irq(skb);
3874                         goto next_desc;
3875                 }
3876
3877                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3878
3879                 if (unlikely(!length)) {
3880                         E1000_DBG("%s: Last part of the packet spanning"
3881                                   " multiple descriptors\n", netdev->name);
3882                         dev_kfree_skb_irq(skb);
3883                         goto next_desc;
3884                 }
3885
3886                 /* Good Receive */
3887                 skb_put(skb, length);
3888
3889                 {
3890                 /* this looks ugly, but it seems compiler issues make it
3891                    more efficient than reusing j */
3892                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3893
3894                 /* page alloc/put takes too long and effects small packet
3895                  * throughput, so unsplit small packets and save the alloc/put*/
3896                 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
3897                         u8 *vaddr;
3898                         /* there is no documentation about how to call
3899                          * kmap_atomic, so we can't hold the mapping
3900                          * very long */
3901                         pci_dma_sync_single_for_cpu(pdev,
3902                                 ps_page_dma->ps_page_dma[0],
3903                                 PAGE_SIZE,
3904                                 PCI_DMA_FROMDEVICE);
3905                         vaddr = kmap_atomic(ps_page->ps_page[0],
3906                                             KM_SKB_DATA_SOFTIRQ);
3907                         memcpy(skb->tail, vaddr, l1);
3908                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3909                         pci_dma_sync_single_for_device(pdev,
3910                                 ps_page_dma->ps_page_dma[0],
3911                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3912                         /* remove the CRC */
3913                         l1 -= 4;
3914                         skb_put(skb, l1);
3915                         goto copydone;
3916                 } /* if */
3917                 }
3918
3919                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3920                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3921                                 break;
3922                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3923                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3924                         ps_page_dma->ps_page_dma[j] = 0;
3925                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3926                                            length);
3927                         ps_page->ps_page[j] = NULL;
3928                         skb->len += length;
3929                         skb->data_len += length;
3930                         skb->truesize += length;
3931                 }
3932
3933                 /* strip the ethernet crc, problem is we're using pages now so
3934                  * this whole operation can get a little cpu intensive */
3935                 pskb_trim(skb, skb->len - 4);
3936
3937 copydone:
3938                 e1000_rx_checksum(adapter, staterr,
3939                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
3940                 skb->protocol = eth_type_trans(skb, netdev);
3941
3942                 if (likely(rx_desc->wb.upper.header_status &
3943                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
3944                         adapter->rx_hdr_split++;
3945 #ifdef CONFIG_E1000_NAPI
3946                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3947                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3948                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3949                                 E1000_RXD_SPC_VLAN_MASK);
3950                 } else {
3951                         netif_receive_skb(skb);
3952                 }
3953 #else /* CONFIG_E1000_NAPI */
3954                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3955                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3956                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3957                                 E1000_RXD_SPC_VLAN_MASK);
3958                 } else {
3959                         netif_rx(skb);
3960                 }
3961 #endif /* CONFIG_E1000_NAPI */
3962                 netdev->last_rx = jiffies;
3963
3964 next_desc:
3965                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
3966                 buffer_info->skb = NULL;
3967
3968                 /* return some buffers to hardware, one at a time is too slow */
3969                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3970                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3971                         cleaned_count = 0;
3972                 }
3973
3974                 /* use prefetched values */
3975                 rx_desc = next_rxd;
3976                 buffer_info = next_buffer;
3977
3978                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3979         }
3980         rx_ring->next_to_clean = i;
3981
3982         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3983         if (cleaned_count)
3984                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3985
3986         return cleaned;
3987 }
3988
3989 /**
3990  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3991  * @adapter: address of board private structure
3992  **/
3993
3994 static void
3995 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3996                        struct e1000_rx_ring *rx_ring,
3997                        int cleaned_count)
3998 {
3999         struct net_device *netdev = adapter->netdev;
4000         struct pci_dev *pdev = adapter->pdev;
4001         struct e1000_rx_desc *rx_desc;
4002         struct e1000_buffer *buffer_info;
4003         struct sk_buff *skb;
4004         unsigned int i;
4005         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4006
4007         i = rx_ring->next_to_use;
4008         buffer_info = &rx_ring->buffer_info[i];
4009
4010         while (cleaned_count--) {
4011                 skb = buffer_info->skb;
4012                 if (skb) {
4013                         skb_trim(skb, 0);
4014                         goto map_skb;
4015                 }
4016
4017                 skb = netdev_alloc_skb(netdev, bufsz);
4018                 if (unlikely(!skb)) {
4019                         /* Better luck next round */
4020                         adapter->alloc_rx_buff_failed++;
4021                         break;
4022                 }
4023
4024                 /* Fix for errata 23, can't cross 64kB boundary */
4025                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4026                         struct sk_buff *oldskb = skb;
4027                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4028                                              "at %p\n", bufsz, skb->data);
4029                         /* Try again, without freeing the previous */
4030                         skb = netdev_alloc_skb(netdev, bufsz);
4031                         /* Failed allocation, critical failure */
4032                         if (!skb) {
4033                                 dev_kfree_skb(oldskb);
4034                                 break;
4035                         }
4036
4037                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4038                                 /* give up */
4039                                 dev_kfree_skb(skb);
4040                                 dev_kfree_skb(oldskb);
4041                                 break; /* while !buffer_info->skb */
4042                         }
4043
4044                         /* Use new allocation */
4045                         dev_kfree_skb(oldskb);
4046                 }
4047                 /* Make buffer alignment 2 beyond a 16 byte boundary
4048                  * this will result in a 16 byte aligned IP header after
4049                  * the 14 byte MAC header is removed
4050                  */
4051                 skb_reserve(skb, NET_IP_ALIGN);
4052
4053                 buffer_info->skb = skb;
4054                 buffer_info->length = adapter->rx_buffer_len;
4055 map_skb:
4056                 buffer_info->dma = pci_map_single(pdev,
4057                                                   skb->data,
4058                                                   adapter->rx_buffer_len,
4059                                                   PCI_DMA_FROMDEVICE);
4060
4061                 /* Fix for errata 23, can't cross 64kB boundary */
4062                 if (!e1000_check_64k_bound(adapter,
4063                                         (void *)(unsigned long)buffer_info->dma,
4064                                         adapter->rx_buffer_len)) {
4065                         DPRINTK(RX_ERR, ERR,
4066                                 "dma align check failed: %u bytes at %p\n",
4067                                 adapter->rx_buffer_len,
4068                                 (void *)(unsigned long)buffer_info->dma);
4069                         dev_kfree_skb(skb);
4070                         buffer_info->skb = NULL;
4071
4072                         pci_unmap_single(pdev, buffer_info->dma,
4073                                          adapter->rx_buffer_len,
4074                                          PCI_DMA_FROMDEVICE);
4075
4076                         break; /* while !buffer_info->skb */
4077                 }
4078                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4079                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4080
4081                 if (unlikely(++i == rx_ring->count))
4082                         i = 0;
4083                 buffer_info = &rx_ring->buffer_info[i];
4084         }
4085
4086         if (likely(rx_ring->next_to_use != i)) {
4087                 rx_ring->next_to_use = i;
4088                 if (unlikely(i-- == 0))
4089                         i = (rx_ring->count - 1);
4090
4091                 /* Force memory writes to complete before letting h/w
4092                  * know there are new descriptors to fetch.  (Only
4093                  * applicable for weak-ordered memory model archs,
4094                  * such as IA-64). */
4095                 wmb();
4096                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4097         }
4098 }
4099
4100 /**
4101  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4102  * @adapter: address of board private structure
4103  **/
4104
4105 static void
4106 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4107                           struct e1000_rx_ring *rx_ring,
4108                           int cleaned_count)
4109 {
4110         struct net_device *netdev = adapter->netdev;
4111         struct pci_dev *pdev = adapter->pdev;
4112         union e1000_rx_desc_packet_split *rx_desc;
4113         struct e1000_buffer *buffer_info;
4114         struct e1000_ps_page *ps_page;
4115         struct e1000_ps_page_dma *ps_page_dma;
4116         struct sk_buff *skb;
4117         unsigned int i, j;
4118
4119         i = rx_ring->next_to_use;
4120         buffer_info = &rx_ring->buffer_info[i];
4121         ps_page = &rx_ring->ps_page[i];
4122         ps_page_dma = &rx_ring->ps_page_dma[i];
4123
4124         while (cleaned_count--) {
4125                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4126
4127                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4128                         if (j < adapter->rx_ps_pages) {
4129                                 if (likely(!ps_page->ps_page[j])) {
4130                                         ps_page->ps_page[j] =
4131                                                 alloc_page(GFP_ATOMIC);
4132                                         if (unlikely(!ps_page->ps_page[j])) {
4133                                                 adapter->alloc_rx_buff_failed++;
4134                                                 goto no_buffers;
4135                                         }
4136                                         ps_page_dma->ps_page_dma[j] =
4137                                                 pci_map_page(pdev,
4138                                                             ps_page->ps_page[j],
4139                                                             0, PAGE_SIZE,
4140                                                             PCI_DMA_FROMDEVICE);
4141                                 }
4142                                 /* Refresh the desc even if buffer_addrs didn't
4143                                  * change because each write-back erases
4144                                  * this info.
4145                                  */
4146                                 rx_desc->read.buffer_addr[j+1] =
4147                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4148                         } else
4149                                 rx_desc->read.buffer_addr[j+1] = ~0;
4150                 }
4151
4152                 skb = netdev_alloc_skb(netdev,
4153                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4154
4155                 if (unlikely(!skb)) {
4156                         adapter->alloc_rx_buff_failed++;
4157                         break;
4158                 }
4159
4160                 /* Make buffer alignment 2 beyond a 16 byte boundary
4161                  * this will result in a 16 byte aligned IP header after
4162                  * the 14 byte MAC header is removed
4163                  */
4164                 skb_reserve(skb, NET_IP_ALIGN);
4165
4166                 buffer_info->skb = skb;
4167                 buffer_info->length = adapter->rx_ps_bsize0;
4168                 buffer_info->dma = pci_map_single(pdev, skb->data,
4169                                                   adapter->rx_ps_bsize0,
4170                                                   PCI_DMA_FROMDEVICE);
4171
4172                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4173
4174                 if (unlikely(++i == rx_ring->count)) i = 0;
4175                 buffer_info = &rx_ring->buffer_info[i];
4176                 ps_page = &rx_ring->ps_page[i];
4177                 ps_page_dma = &rx_ring->ps_page_dma[i];
4178         }
4179
4180 no_buffers:
4181         if (likely(rx_ring->next_to_use != i)) {
4182                 rx_ring->next_to_use = i;
4183                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4184
4185                 /* Force memory writes to complete before letting h/w
4186                  * know there are new descriptors to fetch.  (Only
4187                  * applicable for weak-ordered memory model archs,
4188                  * such as IA-64). */
4189                 wmb();
4190                 /* Hardware increments by 16 bytes, but packet split
4191                  * descriptors are 32 bytes...so we increment tail
4192                  * twice as much.
4193                  */
4194                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4195         }
4196 }
4197
4198 /**
4199  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4200  * @adapter:
4201  **/
4202
4203 static void
4204 e1000_smartspeed(struct e1000_adapter *adapter)
4205 {
4206         uint16_t phy_status;
4207         uint16_t phy_ctrl;
4208
4209         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4210            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4211                 return;
4212
4213         if (adapter->smartspeed == 0) {
4214                 /* If Master/Slave config fault is asserted twice,
4215                  * we assume back-to-back */
4216                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4217                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4218                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4219                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4220                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4221                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4222                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4223                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4224                                             phy_ctrl);
4225                         adapter->smartspeed++;
4226                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4227                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4228                                                &phy_ctrl)) {
4229                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4230                                              MII_CR_RESTART_AUTO_NEG);
4231                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4232                                                     phy_ctrl);
4233                         }
4234                 }
4235                 return;
4236         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4237                 /* If still no link, perhaps using 2/3 pair cable */
4238                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4239                 phy_ctrl |= CR_1000T_MS_ENABLE;
4240                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4241                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4242                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4243                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4244                                      MII_CR_RESTART_AUTO_NEG);
4245                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4246                 }
4247         }
4248         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4249         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4250                 adapter->smartspeed = 0;
4251 }
4252
4253 /**
4254  * e1000_ioctl -
4255  * @netdev:
4256  * @ifreq:
4257  * @cmd:
4258  **/
4259
4260 static int
4261 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4262 {
4263         switch (cmd) {
4264         case SIOCGMIIPHY:
4265         case SIOCGMIIREG:
4266         case SIOCSMIIREG:
4267                 return e1000_mii_ioctl(netdev, ifr, cmd);
4268         default:
4269                 return -EOPNOTSUPP;
4270         }
4271 }
4272
4273 /**
4274  * e1000_mii_ioctl -
4275  * @netdev:
4276  * @ifreq:
4277  * @cmd:
4278  **/
4279
4280 static int
4281 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4282 {
4283         struct e1000_adapter *adapter = netdev_priv(netdev);
4284         struct mii_ioctl_data *data = if_mii(ifr);
4285         int retval;
4286         uint16_t mii_reg;
4287         uint16_t spddplx;
4288         unsigned long flags;
4289
4290         if (adapter->hw.media_type != e1000_media_type_copper)
4291                 return -EOPNOTSUPP;
4292
4293         switch (cmd) {
4294         case SIOCGMIIPHY:
4295                 data->phy_id = adapter->hw.phy_addr;
4296                 break;
4297         case SIOCGMIIREG:
4298                 if (!capable(CAP_NET_ADMIN))
4299                         return -EPERM;
4300                 spin_lock_irqsave(&adapter->stats_lock, flags);
4301                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4302                                    &data->val_out)) {
4303                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4304                         return -EIO;
4305                 }
4306                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4307                 break;
4308         case SIOCSMIIREG:
4309                 if (!capable(CAP_NET_ADMIN))
4310                         return -EPERM;
4311                 if (data->reg_num & ~(0x1F))
4312                         return -EFAULT;
4313                 mii_reg = data->val_in;
4314                 spin_lock_irqsave(&adapter->stats_lock, flags);
4315                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4316                                         mii_reg)) {
4317                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4318                         return -EIO;
4319                 }
4320                 if (adapter->hw.media_type == e1000_media_type_copper) {
4321                         switch (data->reg_num) {
4322                         case PHY_CTRL:
4323                                 if (mii_reg & MII_CR_POWER_DOWN)
4324                                         break;
4325                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4326                                         adapter->hw.autoneg = 1;
4327                                         adapter->hw.autoneg_advertised = 0x2F;
4328                                 } else {
4329                                         if (mii_reg & 0x40)
4330                                                 spddplx = SPEED_1000;
4331                                         else if (mii_reg & 0x2000)
4332                                                 spddplx = SPEED_100;
4333                                         else
4334                                                 spddplx = SPEED_10;
4335                                         spddplx += (mii_reg & 0x100)
4336                                                    ? DUPLEX_FULL :
4337                                                    DUPLEX_HALF;
4338                                         retval = e1000_set_spd_dplx(adapter,
4339                                                                     spddplx);
4340                                         if (retval) {
4341                                                 spin_unlock_irqrestore(
4342                                                         &adapter->stats_lock,
4343                                                         flags);
4344                                                 return retval;
4345                                         }
4346                                 }
4347                                 if (netif_running(adapter->netdev))
4348                                         e1000_reinit_locked(adapter);
4349                                 else
4350                                         e1000_reset(adapter);
4351                                 break;
4352                         case M88E1000_PHY_SPEC_CTRL:
4353                         case M88E1000_EXT_PHY_SPEC_CTRL:
4354                                 if (e1000_phy_reset(&adapter->hw)) {
4355                                         spin_unlock_irqrestore(
4356                                                 &adapter->stats_lock, flags);
4357                                         return -EIO;
4358                                 }
4359                                 break;
4360                         }
4361                 } else {
4362                         switch (data->reg_num) {
4363                         case PHY_CTRL:
4364                                 if (mii_reg & MII_CR_POWER_DOWN)
4365                                         break;
4366                                 if (netif_running(adapter->netdev))
4367                                         e1000_reinit_locked(adapter);
4368                                 else
4369                                         e1000_reset(adapter);
4370                                 break;
4371                         }
4372                 }
4373                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4374                 break;
4375         default:
4376                 return -EOPNOTSUPP;
4377         }
4378         return E1000_SUCCESS;
4379 }
4380
4381 void
4382 e1000_pci_set_mwi(struct e1000_hw *hw)
4383 {
4384         struct e1000_adapter *adapter = hw->back;
4385         int ret_val = pci_set_mwi(adapter->pdev);
4386
4387         if (ret_val)
4388                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4389 }
4390
4391 void
4392 e1000_pci_clear_mwi(struct e1000_hw *hw)
4393 {
4394         struct e1000_adapter *adapter = hw->back;
4395
4396         pci_clear_mwi(adapter->pdev);
4397 }
4398
4399 void
4400 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4401 {
4402         struct e1000_adapter *adapter = hw->back;
4403
4404         pci_read_config_word(adapter->pdev, reg, value);
4405 }
4406
4407 void
4408 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4409 {
4410         struct e1000_adapter *adapter = hw->back;
4411
4412         pci_write_config_word(adapter->pdev, reg, *value);
4413 }
4414
4415 #if 0
4416 uint32_t
4417 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4418 {
4419         return inl(port);
4420 }
4421 #endif  /*  0  */
4422
4423 void
4424 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4425 {
4426         outl(value, port);
4427 }
4428
4429 static void
4430 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4431 {
4432         struct e1000_adapter *adapter = netdev_priv(netdev);
4433         uint32_t ctrl, rctl;
4434
4435         e1000_irq_disable(adapter);
4436         adapter->vlgrp = grp;
4437
4438         if (grp) {
4439                 /* enable VLAN tag insert/strip */
4440                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4441                 ctrl |= E1000_CTRL_VME;
4442                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4443
4444                 if (adapter->hw.mac_type != e1000_ich8lan) {
4445                 /* enable VLAN receive filtering */
4446                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4447                 rctl |= E1000_RCTL_VFE;
4448                 rctl &= ~E1000_RCTL_CFIEN;
4449                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4450                 e1000_update_mng_vlan(adapter);
4451                 }
4452         } else {
4453                 /* disable VLAN tag insert/strip */
4454                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4455                 ctrl &= ~E1000_CTRL_VME;
4456                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4457
4458                 if (adapter->hw.mac_type != e1000_ich8lan) {
4459                 /* disable VLAN filtering */
4460                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4461                 rctl &= ~E1000_RCTL_VFE;
4462                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4463                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4464                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4465                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4466                 }
4467                 }
4468         }
4469
4470         e1000_irq_enable(adapter);
4471 }
4472
4473 static void
4474 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4475 {
4476         struct e1000_adapter *adapter = netdev_priv(netdev);
4477         uint32_t vfta, index;
4478
4479         if ((adapter->hw.mng_cookie.status &
4480              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4481             (vid == adapter->mng_vlan_id))
4482                 return;
4483         /* add VID to filter table */
4484         index = (vid >> 5) & 0x7F;
4485         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4486         vfta |= (1 << (vid & 0x1F));
4487         e1000_write_vfta(&adapter->hw, index, vfta);
4488 }
4489
4490 static void
4491 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4492 {
4493         struct e1000_adapter *adapter = netdev_priv(netdev);
4494         uint32_t vfta, index;
4495
4496         e1000_irq_disable(adapter);
4497
4498         if (adapter->vlgrp)
4499                 adapter->vlgrp->vlan_devices[vid] = NULL;
4500
4501         e1000_irq_enable(adapter);
4502
4503         if ((adapter->hw.mng_cookie.status &
4504              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4505             (vid == adapter->mng_vlan_id)) {
4506                 /* release control to f/w */
4507                 e1000_release_hw_control(adapter);
4508                 return;
4509         }
4510
4511         /* remove VID from filter table */
4512         index = (vid >> 5) & 0x7F;
4513         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4514         vfta &= ~(1 << (vid & 0x1F));
4515         e1000_write_vfta(&adapter->hw, index, vfta);
4516 }
4517
4518 static void
4519 e1000_restore_vlan(struct e1000_adapter *adapter)
4520 {
4521         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4522
4523         if (adapter->vlgrp) {
4524                 uint16_t vid;
4525                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4526                         if (!adapter->vlgrp->vlan_devices[vid])
4527                                 continue;
4528                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4529                 }
4530         }
4531 }
4532
4533 int
4534 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4535 {
4536         adapter->hw.autoneg = 0;
4537
4538         /* Fiber NICs only allow 1000 gbps Full duplex */
4539         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4540                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4541                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4542                 return -EINVAL;
4543         }
4544
4545         switch (spddplx) {
4546         case SPEED_10 + DUPLEX_HALF:
4547                 adapter->hw.forced_speed_duplex = e1000_10_half;
4548                 break;
4549         case SPEED_10 + DUPLEX_FULL:
4550                 adapter->hw.forced_speed_duplex = e1000_10_full;
4551                 break;
4552         case SPEED_100 + DUPLEX_HALF:
4553                 adapter->hw.forced_speed_duplex = e1000_100_half;
4554                 break;
4555         case SPEED_100 + DUPLEX_FULL:
4556                 adapter->hw.forced_speed_duplex = e1000_100_full;
4557                 break;
4558         case SPEED_1000 + DUPLEX_FULL:
4559                 adapter->hw.autoneg = 1;
4560                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4561                 break;
4562         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4563         default:
4564                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4565                 return -EINVAL;
4566         }
4567         return 0;
4568 }
4569
4570 #ifdef CONFIG_PM
4571 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4572  * bus we're on (PCI(X) vs. PCI-E)
4573  */
4574 #define PCIE_CONFIG_SPACE_LEN 256
4575 #define PCI_CONFIG_SPACE_LEN 64
4576 static int
4577 e1000_pci_save_state(struct e1000_adapter *adapter)
4578 {
4579         struct pci_dev *dev = adapter->pdev;
4580         int size;
4581         int i;
4582
4583         if (adapter->hw.mac_type >= e1000_82571)
4584                 size = PCIE_CONFIG_SPACE_LEN;
4585         else
4586                 size = PCI_CONFIG_SPACE_LEN;
4587
4588         WARN_ON(adapter->config_space != NULL);
4589
4590         adapter->config_space = kmalloc(size, GFP_KERNEL);
4591         if (!adapter->config_space) {
4592                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4593                 return -ENOMEM;
4594         }
4595         for (i = 0; i < (size / 4); i++)
4596                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4597         return 0;
4598 }
4599
4600 static void
4601 e1000_pci_restore_state(struct e1000_adapter *adapter)
4602 {
4603         struct pci_dev *dev = adapter->pdev;
4604         int size;
4605         int i;
4606
4607         if (adapter->config_space == NULL)
4608                 return;
4609
4610         if (adapter->hw.mac_type >= e1000_82571)
4611                 size = PCIE_CONFIG_SPACE_LEN;
4612         else
4613                 size = PCI_CONFIG_SPACE_LEN;
4614         for (i = 0; i < (size / 4); i++)
4615                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4616         kfree(adapter->config_space);
4617         adapter->config_space = NULL;
4618         return;
4619 }
4620 #endif /* CONFIG_PM */
4621
4622 static int
4623 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4624 {
4625         struct net_device *netdev = pci_get_drvdata(pdev);
4626         struct e1000_adapter *adapter = netdev_priv(netdev);
4627         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4628         uint32_t wufc = adapter->wol;
4629 #ifdef CONFIG_PM
4630         int retval = 0;
4631 #endif
4632
4633         netif_device_detach(netdev);
4634
4635         if (netif_running(netdev)) {
4636                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4637                 e1000_down(adapter);
4638         }
4639
4640 #ifdef CONFIG_PM
4641         /* Implement our own version of pci_save_state(pdev) because pci-
4642          * express adapters have 256-byte config spaces. */
4643         retval = e1000_pci_save_state(adapter);
4644         if (retval)
4645                 return retval;
4646 #endif
4647
4648         status = E1000_READ_REG(&adapter->hw, STATUS);
4649         if (status & E1000_STATUS_LU)
4650                 wufc &= ~E1000_WUFC_LNKC;
4651
4652         if (wufc) {
4653                 e1000_setup_rctl(adapter);
4654                 e1000_set_multi(netdev);
4655
4656                 /* turn on all-multi mode if wake on multicast is enabled */
4657                 if (wufc & E1000_WUFC_MC) {
4658                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4659                         rctl |= E1000_RCTL_MPE;
4660                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4661                 }
4662
4663                 if (adapter->hw.mac_type >= e1000_82540) {
4664                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4665                         /* advertise wake from D3Cold */
4666                         #define E1000_CTRL_ADVD3WUC 0x00100000
4667                         /* phy power management enable */
4668                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4669                         ctrl |= E1000_CTRL_ADVD3WUC |
4670                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4671                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4672                 }
4673
4674                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4675                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4676                         /* keep the laser running in D3 */
4677                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4678                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4679                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4680                 }
4681
4682                 /* Allow time for pending master requests to run */
4683                 e1000_disable_pciex_master(&adapter->hw);
4684
4685                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4686                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4687                 pci_enable_wake(pdev, PCI_D3hot, 1);
4688                 pci_enable_wake(pdev, PCI_D3cold, 1);
4689         } else {
4690                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4691                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4692                 pci_enable_wake(pdev, PCI_D3hot, 0);
4693                 pci_enable_wake(pdev, PCI_D3cold, 0);
4694         }
4695
4696         /* FIXME: this code is incorrect for PCI Express */
4697         if (adapter->hw.mac_type >= e1000_82540 &&
4698            adapter->hw.mac_type != e1000_ich8lan &&
4699            adapter->hw.media_type == e1000_media_type_copper) {
4700                 manc = E1000_READ_REG(&adapter->hw, MANC);
4701                 if (manc & E1000_MANC_SMBUS_EN) {
4702                         manc |= E1000_MANC_ARP_EN;
4703                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4704                         pci_enable_wake(pdev, PCI_D3hot, 1);
4705                         pci_enable_wake(pdev, PCI_D3cold, 1);
4706                 }
4707         }
4708
4709         if (adapter->hw.phy_type == e1000_phy_igp_3)
4710                 e1000_phy_powerdown_workaround(&adapter->hw);
4711
4712         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4713          * would have already happened in close and is redundant. */
4714         e1000_release_hw_control(adapter);
4715
4716         pci_disable_device(pdev);
4717
4718         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4719
4720         return 0;
4721 }
4722
4723 #ifdef CONFIG_PM
4724 static int
4725 e1000_resume(struct pci_dev *pdev)
4726 {
4727         struct net_device *netdev = pci_get_drvdata(pdev);
4728         struct e1000_adapter *adapter = netdev_priv(netdev);
4729         uint32_t manc, err;
4730
4731         pci_set_power_state(pdev, PCI_D0);
4732         e1000_pci_restore_state(adapter);
4733         if ((err = pci_enable_device(pdev))) {
4734                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4735                 return err;
4736         }
4737         pci_set_master(pdev);
4738
4739         pci_enable_wake(pdev, PCI_D3hot, 0);
4740         pci_enable_wake(pdev, PCI_D3cold, 0);
4741
4742         e1000_reset(adapter);
4743         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4744
4745         if (netif_running(netdev))
4746                 e1000_up(adapter);
4747
4748         netif_device_attach(netdev);
4749
4750         /* FIXME: this code is incorrect for PCI Express */
4751         if (adapter->hw.mac_type >= e1000_82540 &&
4752            adapter->hw.mac_type != e1000_ich8lan &&
4753            adapter->hw.media_type == e1000_media_type_copper) {
4754                 manc = E1000_READ_REG(&adapter->hw, MANC);
4755                 manc &= ~(E1000_MANC_ARP_EN);
4756                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4757         }
4758
4759         /* If the controller is 82573 and f/w is AMT, do not set
4760          * DRV_LOAD until the interface is up.  For all other cases,
4761          * let the f/w know that the h/w is now under the control
4762          * of the driver. */
4763         if (adapter->hw.mac_type != e1000_82573 ||
4764             !e1000_check_mng_mode(&adapter->hw))
4765                 e1000_get_hw_control(adapter);
4766
4767         return 0;
4768 }
4769 #endif
4770
4771 static void e1000_shutdown(struct pci_dev *pdev)
4772 {
4773         e1000_suspend(pdev, PMSG_SUSPEND);
4774 }
4775
4776 #ifdef CONFIG_NET_POLL_CONTROLLER
4777 /*
4778  * Polling 'interrupt' - used by things like netconsole to send skbs
4779  * without having to re-enable interrupts. It's not called while
4780  * the interrupt routine is executing.
4781  */
4782 static void
4783 e1000_netpoll(struct net_device *netdev)
4784 {
4785         struct e1000_adapter *adapter = netdev_priv(netdev);
4786
4787         disable_irq(adapter->pdev->irq);
4788         e1000_intr(adapter->pdev->irq, netdev, NULL);
4789         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4790 #ifndef CONFIG_E1000_NAPI
4791         adapter->clean_rx(adapter, adapter->rx_ring);
4792 #endif
4793         enable_irq(adapter->pdev->irq);
4794 }
4795 #endif
4796
4797 /**
4798  * e1000_io_error_detected - called when PCI error is detected
4799  * @pdev: Pointer to PCI device
4800  * @state: The current pci conneection state
4801  *
4802  * This function is called after a PCI bus error affecting
4803  * this device has been detected.
4804  */
4805 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4806 {
4807         struct net_device *netdev = pci_get_drvdata(pdev);
4808         struct e1000_adapter *adapter = netdev->priv;
4809
4810         netif_device_detach(netdev);
4811
4812         if (netif_running(netdev))
4813                 e1000_down(adapter);
4814         pci_disable_device(pdev);
4815
4816         /* Request a slot slot reset. */
4817         return PCI_ERS_RESULT_NEED_RESET;
4818 }
4819
4820 /**
4821  * e1000_io_slot_reset - called after the pci bus has been reset.
4822  * @pdev: Pointer to PCI device
4823  *
4824  * Restart the card from scratch, as if from a cold-boot. Implementation
4825  * resembles the first-half of the e1000_resume routine.
4826  */
4827 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4828 {
4829         struct net_device *netdev = pci_get_drvdata(pdev);
4830         struct e1000_adapter *adapter = netdev->priv;
4831
4832         if (pci_enable_device(pdev)) {
4833                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4834                 return PCI_ERS_RESULT_DISCONNECT;
4835         }
4836         pci_set_master(pdev);
4837
4838         pci_enable_wake(pdev, 3, 0);
4839         pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4840
4841         /* Perform card reset only on one instance of the card */
4842         if (PCI_FUNC (pdev->devfn) != 0)
4843                 return PCI_ERS_RESULT_RECOVERED;
4844
4845         e1000_reset(adapter);
4846         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4847
4848         return PCI_ERS_RESULT_RECOVERED;
4849 }
4850
4851 /**
4852  * e1000_io_resume - called when traffic can start flowing again.
4853  * @pdev: Pointer to PCI device
4854  *
4855  * This callback is called when the error recovery driver tells us that
4856  * its OK to resume normal operation. Implementation resembles the
4857  * second-half of the e1000_resume routine.
4858  */
4859 static void e1000_io_resume(struct pci_dev *pdev)
4860 {
4861         struct net_device *netdev = pci_get_drvdata(pdev);
4862         struct e1000_adapter *adapter = netdev->priv;
4863         uint32_t manc, swsm;
4864
4865         if (netif_running(netdev)) {
4866                 if (e1000_up(adapter)) {
4867                         printk("e1000: can't bring device back up after reset\n");
4868                         return;
4869                 }
4870         }
4871
4872         netif_device_attach(netdev);
4873
4874         if (adapter->hw.mac_type >= e1000_82540 &&
4875             adapter->hw.media_type == e1000_media_type_copper) {
4876                 manc = E1000_READ_REG(&adapter->hw, MANC);
4877                 manc &= ~(E1000_MANC_ARP_EN);
4878                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4879         }
4880
4881         switch (adapter->hw.mac_type) {
4882         case e1000_82573:
4883                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4884                 E1000_WRITE_REG(&adapter->hw, SWSM,
4885                                 swsm | E1000_SWSM_DRV_LOAD);
4886                 break;
4887         default:
4888                 break;
4889         }
4890
4891         if (netif_running(netdev))
4892                 mod_timer(&adapter->watchdog_timer, jiffies);
4893 }
4894
4895 /* e1000_main.c */