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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 char e1000_driver_name[] = "e1000";
  32 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  33 #ifndef CONFIG_E1000_NAPI
  34 #define DRIVERNAPI
  35 #else
  36 #define DRIVERNAPI "-NAPI"
  37 #endif
  38 #define DRV_VERSION "7.2.9-k2"DRIVERNAPI
  39 char e1000_driver_version[] = DRV_VERSION;
  40 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  41
  42 /* e1000_pci_tbl - PCI Device ID Table
  43  *
  44  * Last entry must be all 0s
  45  *
  46  * Macro expands to...
  47  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  48  */
  49 static struct pci_device_id e1000_pci_tbl[] = {
  50         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  51         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  52         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  53         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  54         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  55         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  56         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  57         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  58         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  69         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  70         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  71         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1049),
  76         INTEL_E1000_ETHERNET_DEVICE(0x104A),
  77         INTEL_E1000_ETHERNET_DEVICE(0x104B),
  78         INTEL_E1000_ETHERNET_DEVICE(0x104C),
  79         INTEL_E1000_ETHERNET_DEVICE(0x104D),
  80         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  81         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  88         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  89         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  90         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  94         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  95         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  96         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  97         INTEL_E1000_ETHERNET_DEVICE(0x1096),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1098),
  99         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 100         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 101         INTEL_E1000_ETHERNET_DEVICE(0x10A4),
 102         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 103         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 104         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
 105         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
 106         /* required last entry */
 107         {0,}
 108 };
 109
 110 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 111
 112 int e1000_up(struct e1000_adapter *adapter);
 113 void e1000_down(struct e1000_adapter *adapter);
 114 void e1000_reinit_locked(struct e1000_adapter *adapter);
 115 void e1000_reset(struct e1000_adapter *adapter);
 116 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 117 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 118 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 119 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 120 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 121 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 122                              struct e1000_tx_ring *txdr);
 123 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 124                              struct e1000_rx_ring *rxdr);
 125 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 126                              struct e1000_tx_ring *tx_ring);
 127 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 128                              struct e1000_rx_ring *rx_ring);
 129 void e1000_update_stats(struct e1000_adapter *adapter);
 130
 131 static int e1000_init_module(void);
 132 static void e1000_exit_module(void);
 133 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 134 static void __devexit e1000_remove(struct pci_dev *pdev);
 135 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 136 static int e1000_sw_init(struct e1000_adapter *adapter);
 137 static int e1000_open(struct net_device *netdev);
 138 static int e1000_close(struct net_device *netdev);
 139 static void e1000_configure_tx(struct e1000_adapter *adapter);
 140 static void e1000_configure_rx(struct e1000_adapter *adapter);
 141 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 142 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 143 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 144 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 145                                 struct e1000_tx_ring *tx_ring);
 146 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 147                                 struct e1000_rx_ring *rx_ring);
 148 static void e1000_set_multi(struct net_device *netdev);
 149 static void e1000_update_phy_info(unsigned long data);
 150 static void e1000_watchdog(unsigned long data);
 151 static void e1000_82547_tx_fifo_stall(unsigned long data);
 152 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 153 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 154 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 155 static int e1000_set_mac(struct net_device *netdev, void *p);
 156 static irqreturn_t e1000_intr(int irq, void *data);
 157 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 158                                     struct e1000_tx_ring *tx_ring);
 159 #ifdef CONFIG_E1000_NAPI
 160 static int e1000_clean(struct net_device *poll_dev, int *budget);
 161 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 162                                     struct e1000_rx_ring *rx_ring,
 163                                     int *work_done, int work_to_do);
 164 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 165                                        struct e1000_rx_ring *rx_ring,
 166                                        int *work_done, int work_to_do);
 167 #else
 168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 169                                     struct e1000_rx_ring *rx_ring);
 170 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 171                                        struct e1000_rx_ring *rx_ring);
 172 #endif
 173 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 174                                    struct e1000_rx_ring *rx_ring,
 175                                    int cleaned_count);
 176 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 177                                       struct e1000_rx_ring *rx_ring,
 178                                       int cleaned_count);
 179 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 180 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 181                            int cmd);
 182 void e1000_set_ethtool_ops(struct net_device *netdev);
 183 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 184 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 185 static void e1000_tx_timeout(struct net_device *dev);
 186 static void e1000_reset_task(struct net_device *dev);
 187 static void e1000_smartspeed(struct e1000_adapter *adapter);
 188 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 189                                        struct sk_buff *skb);
 190
 191 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 192 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 193 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 194 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 195
 196 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 197 #ifdef CONFIG_PM
 198 static int e1000_resume(struct pci_dev *pdev);
 199 #endif
 200 static void e1000_shutdown(struct pci_dev *pdev);
 201
 202 #ifdef CONFIG_NET_POLL_CONTROLLER
 203 /* for netdump / net console */
 204 static void e1000_netpoll (struct net_device *netdev);
 205 #endif
 206
 207 extern void e1000_check_options(struct e1000_adapter *adapter);
 208
 209 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 210                      pci_channel_state_t state);
 211 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 212 static void e1000_io_resume(struct pci_dev *pdev);
 213
 214 static struct pci_error_handlers e1000_err_handler = {
 215         .error_detected = e1000_io_error_detected,
 216         .slot_reset = e1000_io_slot_reset,
 217         .resume = e1000_io_resume,
 218 };
 219
 220 static struct pci_driver e1000_driver = {
 221         .name     = e1000_driver_name,
 222         .id_table = e1000_pci_tbl,
 223         .probe    = e1000_probe,
 224         .remove   = __devexit_p(e1000_remove),
 225 #ifdef CONFIG_PM
 226         /* Power Managment Hooks */
 227         .suspend  = e1000_suspend,
 228         .resume   = e1000_resume,
 229 #endif
 230         .shutdown = e1000_shutdown,
 231         .err_handler = &e1000_err_handler
 232 };
 233
 234 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 235 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 236 MODULE_LICENSE("GPL");
 237 MODULE_VERSION(DRV_VERSION);
 238
 239 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 240 module_param(debug, int, 0);
 241 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 242
 243 /**
 244  * e1000_init_module - Driver Registration Routine
 245  *
 246  * e1000_init_module is the first routine called when the driver is
 247  * loaded. All it does is register with the PCI subsystem.
 248  **/
 249
 250 static int __init
 251 e1000_init_module(void)
 252 {
 253         int ret;
 254         printk(KERN_INFO "%s - version %s\n",
 255                e1000_driver_string, e1000_driver_version);
 256
 257         printk(KERN_INFO "%s\n", e1000_copyright);
 258
 259         ret = pci_register_driver(&e1000_driver);
 260
 261         return ret;
 262 }
 263
 264 module_init(e1000_init_module);
 265
 266 /**
 267  * e1000_exit_module - Driver Exit Cleanup Routine
 268  *
 269  * e1000_exit_module is called just before the driver is removed
 270  * from memory.
 271  **/
 272
 273 static void __exit
 274 e1000_exit_module(void)
 275 {
 276         pci_unregister_driver(&e1000_driver);
 277 }
 278
 279 module_exit(e1000_exit_module);
 280
 281 static int e1000_request_irq(struct e1000_adapter *adapter)
 282 {
 283         struct net_device *netdev = adapter->netdev;
 284         int flags, err = 0;
 285
 286         flags = IRQF_SHARED;
 287 #ifdef CONFIG_PCI_MSI
 288         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 289                 adapter->have_msi = TRUE;
 290                 if ((err = pci_enable_msi(adapter->pdev))) {
 291                         DPRINTK(PROBE, ERR,
 292                          "Unable to allocate MSI interrupt Error: %d\n", err);
 293                         adapter->have_msi = FALSE;
 294                 }
 295         }
 296         if (adapter->have_msi)
 297                 flags &= ~IRQF_SHARED;
 298 #endif
 299         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 300                                netdev->name, netdev)))
 301                 DPRINTK(PROBE, ERR,
 302                         "Unable to allocate interrupt Error: %d\n", err);
 303
 304         return err;
 305 }
 306
 307 static void e1000_free_irq(struct e1000_adapter *adapter)
 308 {
 309         struct net_device *netdev = adapter->netdev;
 310
 311         free_irq(adapter->pdev->irq, netdev);
 312
 313 #ifdef CONFIG_PCI_MSI
 314         if (adapter->have_msi)
 315                 pci_disable_msi(adapter->pdev);
 316 #endif
 317 }
 318
 319 /**
 320  * e1000_irq_disable - Mask off interrupt generation on the NIC
 321  * @adapter: board private structure
 322  **/
 323
 324 static void
 325 e1000_irq_disable(struct e1000_adapter *adapter)
 326 {
 327         atomic_inc(&adapter->irq_sem);
 328         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 329         E1000_WRITE_FLUSH(&adapter->hw);
 330         synchronize_irq(adapter->pdev->irq);
 331 }
 332
 333 /**
 334  * e1000_irq_enable - Enable default interrupt generation settings
 335  * @adapter: board private structure
 336  **/
 337
 338 static void
 339 e1000_irq_enable(struct e1000_adapter *adapter)
 340 {
 341         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 342                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 343                 E1000_WRITE_FLUSH(&adapter->hw);
 344         }
 345 }
 346
 347 static void
 348 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 349 {
 350         struct net_device *netdev = adapter->netdev;
 351         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 352         uint16_t old_vid = adapter->mng_vlan_id;
 353         if (adapter->vlgrp) {
 354                 if (!adapter->vlgrp->vlan_devices[vid]) {
 355                         if (adapter->hw.mng_cookie.status &
 356                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 357                                 e1000_vlan_rx_add_vid(netdev, vid);
 358                                 adapter->mng_vlan_id = vid;
 359                         } else
 360                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 361
 362                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 363                                         (vid != old_vid) &&
 364                                         !adapter->vlgrp->vlan_devices[old_vid])
 365                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 366                 } else
 367                         adapter->mng_vlan_id = vid;
 368         }
 369 }
 370
 371 /**
 372  * e1000_release_hw_control - release control of the h/w to f/w
 373  * @adapter: address of board private structure
 374  *
 375  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 376  * For ASF and Pass Through versions of f/w this means that the
 377  * driver is no longer loaded. For AMT version (only with 82573) i
 378  * of the f/w this means that the netowrk i/f is closed.
 379  *
 380  **/
 381
 382 static void
 383 e1000_release_hw_control(struct e1000_adapter *adapter)
 384 {
 385         uint32_t ctrl_ext;
 386         uint32_t swsm;
 387         uint32_t extcnf;
 388
 389         /* Let firmware taken over control of h/w */
 390         switch (adapter->hw.mac_type) {
 391         case e1000_82571:
 392         case e1000_82572:
 393         case e1000_80003es2lan:
 394                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 395                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 396                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 397                 break;
 398         case e1000_82573:
 399                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 400                 E1000_WRITE_REG(&adapter->hw, SWSM,
 401                                 swsm & ~E1000_SWSM_DRV_LOAD);
 402         case e1000_ich8lan:
 403                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 404                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 405                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
 406                 break;
 407         default:
 408                 break;
 409         }
 410 }
 411
 412 /**
 413  * e1000_get_hw_control - get control of the h/w from f/w
 414  * @adapter: address of board private structure
 415  *
 416  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 417  * For ASF and Pass Through versions of f/w this means that
 418  * the driver is loaded. For AMT version (only with 82573)
 419  * of the f/w this means that the netowrk i/f is open.
 420  *
 421  **/
 422
 423 static void
 424 e1000_get_hw_control(struct e1000_adapter *adapter)
 425 {
 426         uint32_t ctrl_ext;
 427         uint32_t swsm;
 428         uint32_t extcnf;
 429         /* Let firmware know the driver has taken over */
 430         switch (adapter->hw.mac_type) {
 431         case e1000_82571:
 432         case e1000_82572:
 433         case e1000_80003es2lan:
 434                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 435                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 436                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 437                 break;
 438         case e1000_82573:
 439                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 440                 E1000_WRITE_REG(&adapter->hw, SWSM,
 441                                 swsm | E1000_SWSM_DRV_LOAD);
 442                 break;
 443         case e1000_ich8lan:
 444                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
 445                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
 446                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
 447                 break;
 448         default:
 449                 break;
 450         }
 451 }
 452
 453 int
 454 e1000_up(struct e1000_adapter *adapter)
 455 {
 456         struct net_device *netdev = adapter->netdev;
 457         int i;
 458
 459         /* hardware has been reset, we need to reload some things */
 460
 461         e1000_set_multi(netdev);
 462
 463         e1000_restore_vlan(adapter);
 464
 465         e1000_configure_tx(adapter);
 466         e1000_setup_rctl(adapter);
 467         e1000_configure_rx(adapter);
 468         /* call E1000_DESC_UNUSED which always leaves
 469          * at least 1 descriptor unused to make sure
 470          * next_to_use != next_to_clean */
 471         for (i = 0; i < adapter->num_rx_queues; i++) {
 472                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 473                 adapter->alloc_rx_buf(adapter, ring,
 474                                       E1000_DESC_UNUSED(ring));
 475         }
 476
 477         adapter->tx_queue_len = netdev->tx_queue_len;
 478
 479 #ifdef CONFIG_E1000_NAPI
 480         netif_poll_enable(netdev);
 481 #endif
 482         e1000_irq_enable(adapter);
 483
 484         clear_bit(__E1000_DOWN, &adapter->flags);
 485
 486         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
 487         return 0;
 488 }
 489
 490 /**
 491  * e1000_power_up_phy - restore link in case the phy was powered down
 492  * @adapter: address of board private structure
 493  *
 494  * The phy may be powered down to save power and turn off link when the
 495  * driver is unloaded and wake on lan is not enabled (among others)
 496  * *** this routine MUST be followed by a call to e1000_reset ***
 497  *
 498  **/
 499
 500 void e1000_power_up_phy(struct e1000_adapter *adapter)
 501 {
 502         uint16_t mii_reg = 0;
 503
 504         /* Just clear the power down bit to wake the phy back up */
 505         if (adapter->hw.media_type == e1000_media_type_copper) {
 506                 /* according to the manual, the phy will retain its
 507                  * settings across a power-down/up cycle */
 508                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 509                 mii_reg &= ~MII_CR_POWER_DOWN;
 510                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 511         }
 512 }
 513
 514 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 515 {
 516         /* Power down the PHY so no link is implied when interface is down *
 517          * The PHY cannot be powered down if any of the following is TRUE *
 518          * (a) WoL is enabled
 519          * (b) AMT is active
 520          * (c) SoL/IDER session is active */
 521         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 522            adapter->hw.media_type == e1000_media_type_copper) {
 523                 uint16_t mii_reg = 0;
 524
 525                 switch (adapter->hw.mac_type) {
 526                 case e1000_82540:
 527                 case e1000_82545:
 528                 case e1000_82545_rev_3:
 529                 case e1000_82546:
 530                 case e1000_82546_rev_3:
 531                 case e1000_82541:
 532                 case e1000_82541_rev_2:
 533                 case e1000_82547:
 534                 case e1000_82547_rev_2:
 535                         if (E1000_READ_REG(&adapter->hw, MANC) &
 536                             E1000_MANC_SMBUS_EN)
 537                                 goto out;
 538                         break;
 539                 case e1000_82571:
 540                 case e1000_82572:
 541                 case e1000_82573:
 542                 case e1000_80003es2lan:
 543                 case e1000_ich8lan:
 544                         if (e1000_check_mng_mode(&adapter->hw) ||
 545                             e1000_check_phy_reset_block(&adapter->hw))
 546                                 goto out;
 547                         break;
 548                 default:
 549                         goto out;
 550                 }
 551                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 552                 mii_reg |= MII_CR_POWER_DOWN;
 553                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 554                 mdelay(1);
 555         }
 556 out:
 557         return;
 558 }
 559
 560 void
 561 e1000_down(struct e1000_adapter *adapter)
 562 {
 563         struct net_device *netdev = adapter->netdev;
 564
 565         /* signal that we're down so the interrupt handler does not
 566          * reschedule our watchdog timer */
 567         set_bit(__E1000_DOWN, &adapter->flags);
 568
 569         e1000_irq_disable(adapter);
 570
 571         del_timer_sync(&adapter->tx_fifo_stall_timer);
 572         del_timer_sync(&adapter->watchdog_timer);
 573         del_timer_sync(&adapter->phy_info_timer);
 574
 575 #ifdef CONFIG_E1000_NAPI
 576         netif_poll_disable(netdev);
 577 #endif
 578         netdev->tx_queue_len = adapter->tx_queue_len;
 579         adapter->link_speed = 0;
 580         adapter->link_duplex = 0;
 581         netif_carrier_off(netdev);
 582         netif_stop_queue(netdev);
 583
 584         e1000_reset(adapter);
 585         e1000_clean_all_tx_rings(adapter);
 586         e1000_clean_all_rx_rings(adapter);
 587 }
 588
 589 void
 590 e1000_reinit_locked(struct e1000_adapter *adapter)
 591 {
 592         WARN_ON(in_interrupt());
 593         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 594                 msleep(1);
 595         e1000_down(adapter);
 596         e1000_up(adapter);
 597         clear_bit(__E1000_RESETTING, &adapter->flags);
 598 }
 599
 600 void
 601 e1000_reset(struct e1000_adapter *adapter)
 602 {
 603         uint32_t pba, manc;
 604 #ifdef DISABLE_MULR
 605         uint32_t tctl;
 606 #endif
 607         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 608
 609         /* Repartition Pba for greater than 9k mtu
 610          * To take effect CTRL.RST is required.
 611          */
 612
 613         switch (adapter->hw.mac_type) {
 614         case e1000_82547:
 615         case e1000_82547_rev_2:
 616                 pba = E1000_PBA_30K;
 617                 break;
 618         case e1000_82571:
 619         case e1000_82572:
 620         case e1000_80003es2lan:
 621                 pba = E1000_PBA_38K;
 622                 break;
 623         case e1000_82573:
 624                 pba = E1000_PBA_12K;
 625                 break;
 626         case e1000_ich8lan:
 627                 pba = E1000_PBA_8K;
 628                 break;
 629         default:
 630                 pba = E1000_PBA_48K;
 631                 break;
 632         }
 633
 634         if ((adapter->hw.mac_type != e1000_82573) &&
 635            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 636                 pba -= 8; /* allocate more FIFO for Tx */
 637
 638
 639         if (adapter->hw.mac_type == e1000_82547) {
 640                 adapter->tx_fifo_head = 0;
 641                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 642                 adapter->tx_fifo_size =
 643                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 644                 atomic_set(&adapter->tx_fifo_stall, 0);
 645         }
 646
 647         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 648
 649         /* flow control settings */
 650         /* Set the FC high water mark to 90% of the FIFO size.
 651          * Required to clear last 3 LSB */
 652         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 653         /* We can't use 90% on small FIFOs because the remainder
 654          * would be less than 1 full frame.  In this case, we size
 655          * it to allow at least a full frame above the high water
 656          *  mark. */
 657         if (pba < E1000_PBA_16K)
 658                 fc_high_water_mark = (pba * 1024) - 1600;
 659
 660         adapter->hw.fc_high_water = fc_high_water_mark;
 661         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 662         if (adapter->hw.mac_type == e1000_80003es2lan)
 663                 adapter->hw.fc_pause_time = 0xFFFF;
 664         else
 665                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 666         adapter->hw.fc_send_xon = 1;
 667         adapter->hw.fc = adapter->hw.original_fc;
 668
 669         /* Allow time for pending master requests to run */
 670         e1000_reset_hw(&adapter->hw);
 671         if (adapter->hw.mac_type >= e1000_82544)
 672                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 673 #ifdef DISABLE_MULR
 674         /* disable Multiple Reads in Transmit Control Register for debugging */
 675         tctl = E1000_READ_REG(hw, TCTL);
 676         E1000_WRITE_REG(hw, TCTL, tctl & ~E1000_TCTL_MULR);
 677
 678 #endif
 679         if (e1000_init_hw(&adapter->hw))
 680                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 681         e1000_update_mng_vlan(adapter);
 682         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 683         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 684
 685         e1000_reset_adaptive(&adapter->hw);
 686         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 687
 688         if (!adapter->smart_power_down &&
 689             (adapter->hw.mac_type == e1000_82571 ||
 690              adapter->hw.mac_type == e1000_82572)) {
 691                 uint16_t phy_data = 0;
 692                 /* speed up time to link by disabling smart power down, ignore
 693                  * the return value of this function because there is nothing
 694                  * different we would do if it failed */
 695                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 696                                    &phy_data);
 697                 phy_data &= ~IGP02E1000_PM_SPD;
 698                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 699                                     phy_data);
 700         }
 701
 702         if ((adapter->en_mng_pt) &&
 703             (adapter->hw.mac_type >= e1000_82540) &&
 704             (adapter->hw.mac_type < e1000_82571) &&
 705             (adapter->hw.media_type == e1000_media_type_copper)) {
 706                 manc = E1000_READ_REG(&adapter->hw, MANC);
 707                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 708                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 709         }
 710 }
 711
 712 /**
 713  * e1000_probe - Device Initialization Routine
 714  * @pdev: PCI device information struct
 715  * @ent: entry in e1000_pci_tbl
 716  *
 717  * Returns 0 on success, negative on failure
 718  *
 719  * e1000_probe initializes an adapter identified by a pci_dev structure.
 720  * The OS initialization, configuring of the adapter private structure,
 721  * and a hardware reset occur.
 722  **/
 723
 724 static int __devinit
 725 e1000_probe(struct pci_dev *pdev,
 726             const struct pci_device_id *ent)
 727 {
 728         struct net_device *netdev;
 729         struct e1000_adapter *adapter;
 730         unsigned long mmio_start, mmio_len;
 731         unsigned long flash_start, flash_len;
 732
 733         static int cards_found = 0;
 734         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 735         int i, err, pci_using_dac;
 736         uint16_t eeprom_data = 0;
 737         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 738         if ((err = pci_enable_device(pdev)))
 739                 return err;
 740
 741         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 742             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 743                 pci_using_dac = 1;
 744         } else {
 745                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 746                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 747                         E1000_ERR("No usable DMA configuration, aborting\n");
 748                         goto err_dma;
 749                 }
 750                 pci_using_dac = 0;
 751         }
 752
 753         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 754                 goto err_pci_reg;
 755
 756         pci_set_master(pdev);
 757
 758         err = -ENOMEM;
 759         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 760         if (!netdev)
 761                 goto err_alloc_etherdev;
 762
 763         SET_MODULE_OWNER(netdev);
 764         SET_NETDEV_DEV(netdev, &pdev->dev);
 765
 766         pci_set_drvdata(pdev, netdev);
 767         adapter = netdev_priv(netdev);
 768         adapter->netdev = netdev;
 769         adapter->pdev = pdev;
 770         adapter->hw.back = adapter;
 771         adapter->msg_enable = (1 << debug) - 1;
 772
 773         mmio_start = pci_resource_start(pdev, BAR_0);
 774         mmio_len = pci_resource_len(pdev, BAR_0);
 775
 776         err = -EIO;
 777         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 778         if (!adapter->hw.hw_addr)
 779                 goto err_ioremap;
 780
 781         for (i = BAR_1; i <= BAR_5; i++) {
 782                 if (pci_resource_len(pdev, i) == 0)
 783                         continue;
 784                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 785                         adapter->hw.io_base = pci_resource_start(pdev, i);
 786                         break;
 787                 }
 788         }
 789
 790         netdev->open = &e1000_open;
 791         netdev->stop = &e1000_close;
 792         netdev->hard_start_xmit = &e1000_xmit_frame;
 793         netdev->get_stats = &e1000_get_stats;
 794         netdev->set_multicast_list = &e1000_set_multi;
 795         netdev->set_mac_address = &e1000_set_mac;
 796         netdev->change_mtu = &e1000_change_mtu;
 797         netdev->do_ioctl = &e1000_ioctl;
 798         e1000_set_ethtool_ops(netdev);
 799         netdev->tx_timeout = &e1000_tx_timeout;
 800         netdev->watchdog_timeo = 5 * HZ;
 801 #ifdef CONFIG_E1000_NAPI
 802         netdev->poll = &e1000_clean;
 803         netdev->weight = 64;
 804 #endif
 805         netdev->vlan_rx_register = e1000_vlan_rx_register;
 806         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 807         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 808 #ifdef CONFIG_NET_POLL_CONTROLLER
 809         netdev->poll_controller = e1000_netpoll;
 810 #endif
 811         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 812
 813         netdev->mem_start = mmio_start;
 814         netdev->mem_end = mmio_start + mmio_len;
 815         netdev->base_addr = adapter->hw.io_base;
 816
 817         adapter->bd_number = cards_found;
 818
 819         /* setup the private structure */
 820
 821         if ((err = e1000_sw_init(adapter)))
 822                 goto err_sw_init;
 823
 824         err = -EIO;
 825         /* Flash BAR mapping must happen after e1000_sw_init
 826          * because it depends on mac_type */
 827         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 828            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 829                 flash_start = pci_resource_start(pdev, 1);
 830                 flash_len = pci_resource_len(pdev, 1);
 831                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 832                 if (!adapter->hw.flash_address)
 833                         goto err_flashmap;
 834         }
 835
 836         if (e1000_check_phy_reset_block(&adapter->hw))
 837                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 838
 839         if (adapter->hw.mac_type >= e1000_82543) {
 840                 netdev->features = NETIF_F_SG |
 841                                    NETIF_F_HW_CSUM |
 842                                    NETIF_F_HW_VLAN_TX |
 843                                    NETIF_F_HW_VLAN_RX |
 844                                    NETIF_F_HW_VLAN_FILTER;
 845                 if (adapter->hw.mac_type == e1000_ich8lan)
 846                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
 847         }
 848
 849 #ifdef NETIF_F_TSO
 850         if ((adapter->hw.mac_type >= e1000_82544) &&
 851            (adapter->hw.mac_type != e1000_82547))
 852                 netdev->features |= NETIF_F_TSO;
 853
 854 #ifdef NETIF_F_TSO_IPV6
 855         if (adapter->hw.mac_type > e1000_82547_rev_2)
 856                 netdev->features |= NETIF_F_TSO_IPV6;
 857 #endif
 858 #endif
 859         if (pci_using_dac)
 860                 netdev->features |= NETIF_F_HIGHDMA;
 861
 862         netdev->features |= NETIF_F_LLTX;
 863
 864         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 865
 866         /* initialize eeprom parameters */
 867
 868         if (e1000_init_eeprom_params(&adapter->hw)) {
 869                 E1000_ERR("EEPROM initialization failed\n");
 870                 goto err_eeprom;
 871         }
 872
 873         /* before reading the EEPROM, reset the controller to
 874          * put the device in a known good starting state */
 875
 876         e1000_reset_hw(&adapter->hw);
 877
 878         /* make sure the EEPROM is good */
 879
 880         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 881                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 882                 goto err_eeprom;
 883         }
 884
 885         /* copy the MAC address out of the EEPROM */
 886
 887         if (e1000_read_mac_addr(&adapter->hw))
 888                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 889         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 890         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 891
 892         if (!is_valid_ether_addr(netdev->perm_addr)) {
 893                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 894                 goto err_eeprom;
 895         }
 896
 897         e1000_get_bus_info(&adapter->hw);
 898
 899         init_timer(&adapter->tx_fifo_stall_timer);
 900         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 901         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 902
 903         init_timer(&adapter->watchdog_timer);
 904         adapter->watchdog_timer.function = &e1000_watchdog;
 905         adapter->watchdog_timer.data = (unsigned long) adapter;
 906
 907         init_timer(&adapter->phy_info_timer);
 908         adapter->phy_info_timer.function = &e1000_update_phy_info;
 909         adapter->phy_info_timer.data = (unsigned long) adapter;
 910
 911         INIT_WORK(&adapter->reset_task,
 912                 (void (*)(void *))e1000_reset_task, netdev);
 913
 914         e1000_check_options(adapter);
 915
 916         /* Initial Wake on LAN setting
 917          * If APM wake is enabled in the EEPROM,
 918          * enable the ACPI Magic Packet filter
 919          */
 920
 921         switch (adapter->hw.mac_type) {
 922         case e1000_82542_rev2_0:
 923         case e1000_82542_rev2_1:
 924         case e1000_82543:
 925                 break;
 926         case e1000_82544:
 927                 e1000_read_eeprom(&adapter->hw,
 928                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 929                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 930                 break;
 931         case e1000_ich8lan:
 932                 e1000_read_eeprom(&adapter->hw,
 933                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
 934                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
 935                 break;
 936         case e1000_82546:
 937         case e1000_82546_rev_3:
 938         case e1000_82571:
 939         case e1000_80003es2lan:
 940                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 941                         e1000_read_eeprom(&adapter->hw,
 942                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 943                         break;
 944                 }
 945                 /* Fall Through */
 946         default:
 947                 e1000_read_eeprom(&adapter->hw,
 948                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 949                 break;
 950         }
 951         if (eeprom_data & eeprom_apme_mask)
 952                 adapter->eeprom_wol |= E1000_WUFC_MAG;
 953
 954         /* now that we have the eeprom settings, apply the special cases
 955          * where the eeprom may be wrong or the board simply won't support
 956          * wake on lan on a particular port */
 957         switch (pdev->device) {
 958         case E1000_DEV_ID_82546GB_PCIE:
 959                 adapter->eeprom_wol = 0;
 960                 break;
 961         case E1000_DEV_ID_82546EB_FIBER:
 962         case E1000_DEV_ID_82546GB_FIBER:
 963         case E1000_DEV_ID_82571EB_FIBER:
 964                 /* Wake events only supported on port A for dual fiber
 965                  * regardless of eeprom setting */
 966                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 967                         adapter->eeprom_wol = 0;
 968                 break;
 969         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
 970         case E1000_DEV_ID_82571EB_QUAD_COPPER:
 971                 /* if quad port adapter, disable WoL on all but port A */
 972                 if (global_quad_port_a != 0)
 973                         adapter->eeprom_wol = 0;
 974                 else
 975                         adapter->quad_port_a = 1;
 976                 /* Reset for multiple quad port adapters */
 977                 if (++global_quad_port_a == 4)
 978                         global_quad_port_a = 0;
 979                 break;
 980         }
 981
 982         /* initialize the wol settings based on the eeprom settings */
 983         adapter->wol = adapter->eeprom_wol;
 984
 985         /* print bus type/speed/width info */
 986         {
 987         struct e1000_hw *hw = &adapter->hw;
 988         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 989                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 990                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 991                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 992                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 993                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 994                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 995                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 996                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 997                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 998                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 999                  "32-bit"));
1000         }
1001
1002         for (i = 0; i < 6; i++)
1003                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1004
1005         /* reset the hardware with the new settings */
1006         e1000_reset(adapter);
1007
1008         /* If the controller is 82573 and f/w is AMT, do not set
1009          * DRV_LOAD until the interface is up.  For all other cases,
1010          * let the f/w know that the h/w is now under the control
1011          * of the driver. */
1012         if (adapter->hw.mac_type != e1000_82573 ||
1013             !e1000_check_mng_mode(&adapter->hw))
1014                 e1000_get_hw_control(adapter);
1015
1016         strcpy(netdev->name, "eth%d");
1017         if ((err = register_netdev(netdev)))
1018                 goto err_register;
1019
1020         /* tell the stack to leave us alone until e1000_open() is called */
1021         netif_carrier_off(netdev);
1022         netif_stop_queue(netdev);
1023
1024         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1025
1026         cards_found++;
1027         return 0;
1028
1029 err_register:
1030         e1000_release_hw_control(adapter);
1031 err_eeprom:
1032         if (!e1000_check_phy_reset_block(&adapter->hw))
1033                 e1000_phy_hw_reset(&adapter->hw);
1034
1035         if (adapter->hw.flash_address)
1036                 iounmap(adapter->hw.flash_address);
1037 err_flashmap:
1038 #ifdef CONFIG_E1000_NAPI
1039         for (i = 0; i < adapter->num_rx_queues; i++)
1040                 dev_put(&adapter->polling_netdev[i]);
1041 #endif
1042
1043         kfree(adapter->tx_ring);
1044         kfree(adapter->rx_ring);
1045 #ifdef CONFIG_E1000_NAPI
1046         kfree(adapter->polling_netdev);
1047 #endif
1048 err_sw_init:
1049         iounmap(adapter->hw.hw_addr);
1050 err_ioremap:
1051         free_netdev(netdev);
1052 err_alloc_etherdev:
1053         pci_release_regions(pdev);
1054 err_pci_reg:
1055 err_dma:
1056         pci_disable_device(pdev);
1057         return err;
1058 }
1059
1060 /**
1061  * e1000_remove - Device Removal Routine
1062  * @pdev: PCI device information struct
1063  *
1064  * e1000_remove is called by the PCI subsystem to alert the driver
1065  * that it should release a PCI device.  The could be caused by a
1066  * Hot-Plug event, or because the driver is going to be removed from
1067  * memory.
1068  **/
1069
1070 static void __devexit
1071 e1000_remove(struct pci_dev *pdev)
1072 {
1073         struct net_device *netdev = pci_get_drvdata(pdev);
1074         struct e1000_adapter *adapter = netdev_priv(netdev);
1075         uint32_t manc;
1076 #ifdef CONFIG_E1000_NAPI
1077         int i;
1078 #endif
1079
1080         flush_scheduled_work();
1081
1082         if (adapter->hw.mac_type >= e1000_82540 &&
1083             adapter->hw.mac_type < e1000_82571 &&
1084             adapter->hw.media_type == e1000_media_type_copper) {
1085                 manc = E1000_READ_REG(&adapter->hw, MANC);
1086                 if (manc & E1000_MANC_SMBUS_EN) {
1087                         manc |= E1000_MANC_ARP_EN;
1088                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
1089                 }
1090         }
1091
1092         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1093          * would have already happened in close and is redundant. */
1094         e1000_release_hw_control(adapter);
1095
1096         unregister_netdev(netdev);
1097 #ifdef CONFIG_E1000_NAPI
1098         for (i = 0; i < adapter->num_rx_queues; i++)
1099                 dev_put(&adapter->polling_netdev[i]);
1100 #endif
1101
1102         if (!e1000_check_phy_reset_block(&adapter->hw))
1103                 e1000_phy_hw_reset(&adapter->hw);
1104
1105         kfree(adapter->tx_ring);
1106         kfree(adapter->rx_ring);
1107 #ifdef CONFIG_E1000_NAPI
1108         kfree(adapter->polling_netdev);
1109 #endif
1110
1111         iounmap(adapter->hw.hw_addr);
1112         if (adapter->hw.flash_address)
1113                 iounmap(adapter->hw.flash_address);
1114         pci_release_regions(pdev);
1115
1116         free_netdev(netdev);
1117
1118         pci_disable_device(pdev);
1119 }
1120
1121 /**
1122  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1123  * @adapter: board private structure to initialize
1124  *
1125  * e1000_sw_init initializes the Adapter private data structure.
1126  * Fields are initialized based on PCI device information and
1127  * OS network device settings (MTU size).
1128  **/
1129
1130 static int __devinit
1131 e1000_sw_init(struct e1000_adapter *adapter)
1132 {
1133         struct e1000_hw *hw = &adapter->hw;
1134         struct net_device *netdev = adapter->netdev;
1135         struct pci_dev *pdev = adapter->pdev;
1136 #ifdef CONFIG_E1000_NAPI
1137         int i;
1138 #endif
1139
1140         /* PCI config space info */
1141
1142         hw->vendor_id = pdev->vendor;
1143         hw->device_id = pdev->device;
1144         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1145         hw->subsystem_id = pdev->subsystem_device;
1146
1147         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1148
1149         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1150
1151         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1152         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1153         hw->max_frame_size = netdev->mtu +
1154                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1155         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1156
1157         /* identify the MAC */
1158
1159         if (e1000_set_mac_type(hw)) {
1160                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1161                 return -EIO;
1162         }
1163
1164         switch (hw->mac_type) {
1165         default:
1166                 break;
1167         case e1000_82541:
1168         case e1000_82547:
1169         case e1000_82541_rev_2:
1170         case e1000_82547_rev_2:
1171                 hw->phy_init_script = 1;
1172                 break;
1173         }
1174
1175         e1000_set_media_type(hw);
1176
1177         hw->wait_autoneg_complete = FALSE;
1178         hw->tbi_compatibility_en = TRUE;
1179         hw->adaptive_ifs = TRUE;
1180
1181         /* Copper options */
1182
1183         if (hw->media_type == e1000_media_type_copper) {
1184                 hw->mdix = AUTO_ALL_MODES;
1185                 hw->disable_polarity_correction = FALSE;
1186                 hw->master_slave = E1000_MASTER_SLAVE;
1187         }
1188
1189         adapter->num_tx_queues = 1;
1190         adapter->num_rx_queues = 1;
1191
1192         if (e1000_alloc_queues(adapter)) {
1193                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1194                 return -ENOMEM;
1195         }
1196
1197 #ifdef CONFIG_E1000_NAPI
1198         for (i = 0; i < adapter->num_rx_queues; i++) {
1199                 adapter->polling_netdev[i].priv = adapter;
1200                 adapter->polling_netdev[i].poll = &e1000_clean;
1201                 adapter->polling_netdev[i].weight = 64;
1202                 dev_hold(&adapter->polling_netdev[i]);
1203                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1204         }
1205         spin_lock_init(&adapter->tx_queue_lock);
1206 #endif
1207
1208         atomic_set(&adapter->irq_sem, 1);
1209         spin_lock_init(&adapter->stats_lock);
1210
1211         set_bit(__E1000_DOWN, &adapter->flags);
1212
1213         return 0;
1214 }
1215
1216 /**
1217  * e1000_alloc_queues - Allocate memory for all rings
1218  * @adapter: board private structure to initialize
1219  *
1220  * We allocate one ring per queue at run-time since we don't know the
1221  * number of queues at compile-time.  The polling_netdev array is
1222  * intended for Multiqueue, but should work fine with a single queue.
1223  **/
1224
1225 static int __devinit
1226 e1000_alloc_queues(struct e1000_adapter *adapter)
1227 {
1228         int size;
1229
1230         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1231         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1232         if (!adapter->tx_ring)
1233                 return -ENOMEM;
1234         memset(adapter->tx_ring, 0, size);
1235
1236         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1237         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1238         if (!adapter->rx_ring) {
1239                 kfree(adapter->tx_ring);
1240                 return -ENOMEM;
1241         }
1242         memset(adapter->rx_ring, 0, size);
1243
1244 #ifdef CONFIG_E1000_NAPI
1245         size = sizeof(struct net_device) * adapter->num_rx_queues;
1246         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1247         if (!adapter->polling_netdev) {
1248                 kfree(adapter->tx_ring);
1249                 kfree(adapter->rx_ring);
1250                 return -ENOMEM;
1251         }
1252         memset(adapter->polling_netdev, 0, size);
1253 #endif
1254
1255         return E1000_SUCCESS;
1256 }
1257
1258 /**
1259  * e1000_open - Called when a network interface is made active
1260  * @netdev: network interface device structure
1261  *
1262  * Returns 0 on success, negative value on failure
1263  *
1264  * The open entry point is called when a network interface is made
1265  * active by the system (IFF_UP).  At this point all resources needed
1266  * for transmit and receive operations are allocated, the interrupt
1267  * handler is registered with the OS, the watchdog timer is started,
1268  * and the stack is notified that the interface is ready.
1269  **/
1270
1271 static int
1272 e1000_open(struct net_device *netdev)
1273 {
1274         struct e1000_adapter *adapter = netdev_priv(netdev);
1275         int err;
1276
1277         /* disallow open during test */
1278         if (test_bit(__E1000_TESTING, &adapter->flags))
1279                 return -EBUSY;
1280
1281         /* allocate transmit descriptors */
1282
1283         if ((err = e1000_setup_all_tx_resources(adapter)))
1284                 goto err_setup_tx;
1285
1286         /* allocate receive descriptors */
1287
1288         if ((err = e1000_setup_all_rx_resources(adapter)))
1289                 goto err_setup_rx;
1290
1291         err = e1000_request_irq(adapter);
1292         if (err)
1293                 goto err_req_irq;
1294
1295         e1000_power_up_phy(adapter);
1296
1297         if ((err = e1000_up(adapter)))
1298                 goto err_up;
1299         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1300         if ((adapter->hw.mng_cookie.status &
1301                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1302                 e1000_update_mng_vlan(adapter);
1303         }
1304
1305         /* If AMT is enabled, let the firmware know that the network
1306          * interface is now open */
1307         if (adapter->hw.mac_type == e1000_82573 &&
1308             e1000_check_mng_mode(&adapter->hw))
1309                 e1000_get_hw_control(adapter);
1310
1311         return E1000_SUCCESS;
1312
1313 err_up:
1314         e1000_power_down_phy(adapter);
1315         e1000_free_irq(adapter);
1316 err_req_irq:
1317         e1000_free_all_rx_resources(adapter);
1318 err_setup_rx:
1319         e1000_free_all_tx_resources(adapter);
1320 err_setup_tx:
1321         e1000_reset(adapter);
1322
1323         return err;
1324 }
1325
1326 /**
1327  * e1000_close - Disables a network interface
1328  * @netdev: network interface device structure
1329  *
1330  * Returns 0, this is not allowed to fail
1331  *
1332  * The close entry point is called when an interface is de-activated
1333  * by the OS.  The hardware is still under the drivers control, but
1334  * needs to be disabled.  A global MAC reset is issued to stop the
1335  * hardware, and all transmit and receive resources are freed.
1336  **/
1337
1338 static int
1339 e1000_close(struct net_device *netdev)
1340 {
1341         struct e1000_adapter *adapter = netdev_priv(netdev);
1342
1343         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1344         e1000_down(adapter);
1345         e1000_power_down_phy(adapter);
1346         e1000_free_irq(adapter);
1347
1348         e1000_free_all_tx_resources(adapter);
1349         e1000_free_all_rx_resources(adapter);
1350
1351         /* kill manageability vlan ID if supported, but not if a vlan with
1352          * the same ID is registered on the host OS (let 8021q kill it) */
1353         if ((adapter->hw.mng_cookie.status &
1354                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1355              !(adapter->vlgrp &&
1356                           adapter->vlgrp->vlan_devices[adapter->mng_vlan_id])) {
1357                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1358         }
1359
1360         /* If AMT is enabled, let the firmware know that the network
1361          * interface is now closed */
1362         if (adapter->hw.mac_type == e1000_82573 &&
1363             e1000_check_mng_mode(&adapter->hw))
1364                 e1000_release_hw_control(adapter);
1365
1366         return 0;
1367 }
1368
1369 /**
1370  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1371  * @adapter: address of board private structure
1372  * @start: address of beginning of memory
1373  * @len: length of memory
1374  **/
1375 static boolean_t
1376 e1000_check_64k_bound(struct e1000_adapter *adapter,
1377                       void *start, unsigned long len)
1378 {
1379         unsigned long begin = (unsigned long) start;
1380         unsigned long end = begin + len;
1381
1382         /* First rev 82545 and 82546 need to not allow any memory
1383          * write location to cross 64k boundary due to errata 23 */
1384         if (adapter->hw.mac_type == e1000_82545 ||
1385             adapter->hw.mac_type == e1000_82546) {
1386                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1387         }
1388
1389         return TRUE;
1390 }
1391
1392 /**
1393  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1394  * @adapter: board private structure
1395  * @txdr:    tx descriptor ring (for a specific queue) to setup
1396  *
1397  * Return 0 on success, negative on failure
1398  **/
1399
1400 static int
1401 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1402                          struct e1000_tx_ring *txdr)
1403 {
1404         struct pci_dev *pdev = adapter->pdev;
1405         int size;
1406
1407         size = sizeof(struct e1000_buffer) * txdr->count;
1408         txdr->buffer_info = vmalloc(size);
1409         if (!txdr->buffer_info) {
1410                 DPRINTK(PROBE, ERR,
1411                 "Unable to allocate memory for the transmit descriptor ring\n");
1412                 return -ENOMEM;
1413         }
1414         memset(txdr->buffer_info, 0, size);
1415
1416         /* round up to nearest 4K */
1417
1418         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1419         E1000_ROUNDUP(txdr->size, 4096);
1420
1421         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1422         if (!txdr->desc) {
1423 setup_tx_desc_die:
1424                 vfree(txdr->buffer_info);
1425                 DPRINTK(PROBE, ERR,
1426                 "Unable to allocate memory for the transmit descriptor ring\n");
1427                 return -ENOMEM;
1428         }
1429
1430         /* Fix for errata 23, can't cross 64kB boundary */
1431         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1432                 void *olddesc = txdr->desc;
1433                 dma_addr_t olddma = txdr->dma;
1434                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1435                                      "at %p\n", txdr->size, txdr->desc);
1436                 /* Try again, without freeing the previous */
1437                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1438                 /* Failed allocation, critical failure */
1439                 if (!txdr->desc) {
1440                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1441                         goto setup_tx_desc_die;
1442                 }
1443
1444                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1445                         /* give up */
1446                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1447                                             txdr->dma);
1448                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1449                         DPRINTK(PROBE, ERR,
1450                                 "Unable to allocate aligned memory "
1451                                 "for the transmit descriptor ring\n");
1452                         vfree(txdr->buffer_info);
1453                         return -ENOMEM;
1454                 } else {
1455                         /* Free old allocation, new allocation was successful */
1456                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1457                 }
1458         }
1459         memset(txdr->desc, 0, txdr->size);
1460
1461         txdr->next_to_use = 0;
1462         txdr->next_to_clean = 0;
1463         spin_lock_init(&txdr->tx_lock);
1464
1465         return 0;
1466 }
1467
1468 /**
1469  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1470  *                                (Descriptors) for all queues
1471  * @adapter: board private structure
1472  *
1473  * Return 0 on success, negative on failure
1474  **/
1475
1476 int
1477 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1478 {
1479         int i, err = 0;
1480
1481         for (i = 0; i < adapter->num_tx_queues; i++) {
1482                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1483                 if (err) {
1484                         DPRINTK(PROBE, ERR,
1485                                 "Allocation for Tx Queue %u failed\n", i);
1486                         for (i-- ; i >= 0; i--)
1487                                 e1000_free_tx_resources(adapter,
1488                                                         &adapter->tx_ring[i]);
1489                         break;
1490                 }
1491         }
1492
1493         return err;
1494 }
1495
1496 /**
1497  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1498  * @adapter: board private structure
1499  *
1500  * Configure the Tx unit of the MAC after a reset.
1501  **/
1502
1503 static void
1504 e1000_configure_tx(struct e1000_adapter *adapter)
1505 {
1506         uint64_t tdba;
1507         struct e1000_hw *hw = &adapter->hw;
1508         uint32_t tdlen, tctl, tipg, tarc;
1509         uint32_t ipgr1, ipgr2;
1510
1511         /* Setup the HW Tx Head and Tail descriptor pointers */
1512
1513         switch (adapter->num_tx_queues) {
1514         case 1:
1515         default:
1516                 tdba = adapter->tx_ring[0].dma;
1517                 tdlen = adapter->tx_ring[0].count *
1518                         sizeof(struct e1000_tx_desc);
1519                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1520                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1521                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1522                 E1000_WRITE_REG(hw, TDT, 0);
1523                 E1000_WRITE_REG(hw, TDH, 0);
1524                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1525                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1526                 break;
1527         }
1528
1529         /* Set the default values for the Tx Inter Packet Gap timer */
1530
1531         if (hw->media_type == e1000_media_type_fiber ||
1532             hw->media_type == e1000_media_type_internal_serdes)
1533                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1534         else
1535                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1536
1537         switch (hw->mac_type) {
1538         case e1000_82542_rev2_0:
1539         case e1000_82542_rev2_1:
1540                 tipg = DEFAULT_82542_TIPG_IPGT;
1541                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1542                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1543                 break;
1544         case e1000_80003es2lan:
1545                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1546                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1547                 break;
1548         default:
1549                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1550                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1551                 break;
1552         }
1553         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1554         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1555         E1000_WRITE_REG(hw, TIPG, tipg);
1556
1557         /* Set the Tx Interrupt Delay register */
1558
1559         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1560         if (hw->mac_type >= e1000_82540)
1561                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1562
1563         /* Program the Transmit Control Register */
1564
1565         tctl = E1000_READ_REG(hw, TCTL);
1566         tctl &= ~E1000_TCTL_CT;
1567         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1568                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1569
1570         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1571                 tarc = E1000_READ_REG(hw, TARC0);
1572                 tarc |= (1 << 21);
1573                 E1000_WRITE_REG(hw, TARC0, tarc);
1574         } else if (hw->mac_type == e1000_80003es2lan) {
1575                 tarc = E1000_READ_REG(hw, TARC0);
1576                 tarc |= 1;
1577                 E1000_WRITE_REG(hw, TARC0, tarc);
1578                 tarc = E1000_READ_REG(hw, TARC1);
1579                 tarc |= 1;
1580                 E1000_WRITE_REG(hw, TARC1, tarc);
1581         }
1582
1583         e1000_config_collision_dist(hw);
1584
1585         /* Setup Transmit Descriptor Settings for eop descriptor */
1586         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1587                 E1000_TXD_CMD_IFCS;
1588
1589         if (hw->mac_type < e1000_82543)
1590                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1591         else
1592                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1593
1594         /* Cache if we're 82544 running in PCI-X because we'll
1595          * need this to apply a workaround later in the send path. */
1596         if (hw->mac_type == e1000_82544 &&
1597             hw->bus_type == e1000_bus_type_pcix)
1598                 adapter->pcix_82544 = 1;
1599
1600         E1000_WRITE_REG(hw, TCTL, tctl);
1601
1602 }
1603
1604 /**
1605  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1606  * @adapter: board private structure
1607  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1608  *
1609  * Returns 0 on success, negative on failure
1610  **/
1611
1612 static int
1613 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1614                          struct e1000_rx_ring *rxdr)
1615 {
1616         struct pci_dev *pdev = adapter->pdev;
1617         int size, desc_len;
1618
1619         size = sizeof(struct e1000_buffer) * rxdr->count;
1620         rxdr->buffer_info = vmalloc(size);
1621         if (!rxdr->buffer_info) {
1622                 DPRINTK(PROBE, ERR,
1623                 "Unable to allocate memory for the receive descriptor ring\n");
1624                 return -ENOMEM;
1625         }
1626         memset(rxdr->buffer_info, 0, size);
1627
1628         size = sizeof(struct e1000_ps_page) * rxdr->count;
1629         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1630         if (!rxdr->ps_page) {
1631                 vfree(rxdr->buffer_info);
1632                 DPRINTK(PROBE, ERR,
1633                 "Unable to allocate memory for the receive descriptor ring\n");
1634                 return -ENOMEM;
1635         }
1636         memset(rxdr->ps_page, 0, size);
1637
1638         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1639         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1640         if (!rxdr->ps_page_dma) {
1641                 vfree(rxdr->buffer_info);
1642                 kfree(rxdr->ps_page);
1643                 DPRINTK(PROBE, ERR,
1644                 "Unable to allocate memory for the receive descriptor ring\n");
1645                 return -ENOMEM;
1646         }
1647         memset(rxdr->ps_page_dma, 0, size);
1648
1649         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1650                 desc_len = sizeof(struct e1000_rx_desc);
1651         else
1652                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1653
1654         /* Round up to nearest 4K */
1655
1656         rxdr->size = rxdr->count * desc_len;
1657         E1000_ROUNDUP(rxdr->size, 4096);
1658
1659         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1660
1661         if (!rxdr->desc) {
1662                 DPRINTK(PROBE, ERR,
1663                 "Unable to allocate memory for the receive descriptor ring\n");
1664 setup_rx_desc_die:
1665                 vfree(rxdr->buffer_info);
1666                 kfree(rxdr->ps_page);
1667                 kfree(rxdr->ps_page_dma);
1668                 return -ENOMEM;
1669         }
1670
1671         /* Fix for errata 23, can't cross 64kB boundary */
1672         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1673                 void *olddesc = rxdr->desc;
1674                 dma_addr_t olddma = rxdr->dma;
1675                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1676                                      "at %p\n", rxdr->size, rxdr->desc);
1677                 /* Try again, without freeing the previous */
1678                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1679                 /* Failed allocation, critical failure */
1680                 if (!rxdr->desc) {
1681                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1682                         DPRINTK(PROBE, ERR,
1683                                 "Unable to allocate memory "
1684                                 "for the receive descriptor ring\n");
1685                         goto setup_rx_desc_die;
1686                 }
1687
1688                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1689                         /* give up */
1690                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1691                                             rxdr->dma);
1692                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1693                         DPRINTK(PROBE, ERR,
1694                                 "Unable to allocate aligned memory "
1695                                 "for the receive descriptor ring\n");
1696                         goto setup_rx_desc_die;
1697                 } else {
1698                         /* Free old allocation, new allocation was successful */
1699                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1700                 }
1701         }
1702         memset(rxdr->desc, 0, rxdr->size);
1703
1704         rxdr->next_to_clean = 0;
1705         rxdr->next_to_use = 0;
1706
1707         return 0;
1708 }
1709
1710 /**
1711  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1712  *                                (Descriptors) for all queues
1713  * @adapter: board private structure
1714  *
1715  * Return 0 on success, negative on failure
1716  **/
1717
1718 int
1719 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1720 {
1721         int i, err = 0;
1722
1723         for (i = 0; i < adapter->num_rx_queues; i++) {
1724                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1725                 if (err) {
1726                         DPRINTK(PROBE, ERR,
1727                                 "Allocation for Rx Queue %u failed\n", i);
1728                         for (i-- ; i >= 0; i--)
1729                                 e1000_free_rx_resources(adapter,
1730                                                         &adapter->rx_ring[i]);
1731                         break;
1732                 }
1733         }
1734
1735         return err;
1736 }
1737
1738 /**
1739  * e1000_setup_rctl - configure the receive control registers
1740  * @adapter: Board private structure
1741  **/
1742 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1743                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1744 static void
1745 e1000_setup_rctl(struct e1000_adapter *adapter)
1746 {
1747         uint32_t rctl, rfctl;
1748         uint32_t psrctl = 0;
1749 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1750         uint32_t pages = 0;
1751 #endif
1752
1753         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1754
1755         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1756
1757         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1758                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1759                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1760
1761         if (adapter->hw.tbi_compatibility_on == 1)
1762                 rctl |= E1000_RCTL_SBP;
1763         else
1764                 rctl &= ~E1000_RCTL_SBP;
1765
1766         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1767                 rctl &= ~E1000_RCTL_LPE;
1768         else
1769                 rctl |= E1000_RCTL_LPE;
1770
1771         /* Setup buffer sizes */
1772         rctl &= ~E1000_RCTL_SZ_4096;
1773         rctl |= E1000_RCTL_BSEX;
1774         switch (adapter->rx_buffer_len) {
1775                 case E1000_RXBUFFER_256:
1776                         rctl |= E1000_RCTL_SZ_256;
1777                         rctl &= ~E1000_RCTL_BSEX;
1778                         break;
1779                 case E1000_RXBUFFER_512:
1780                         rctl |= E1000_RCTL_SZ_512;
1781                         rctl &= ~E1000_RCTL_BSEX;
1782                         break;
1783                 case E1000_RXBUFFER_1024:
1784                         rctl |= E1000_RCTL_SZ_1024;
1785                         rctl &= ~E1000_RCTL_BSEX;
1786                         break;
1787                 case E1000_RXBUFFER_2048:
1788                 default:
1789                         rctl |= E1000_RCTL_SZ_2048;
1790                         rctl &= ~E1000_RCTL_BSEX;
1791                         break;
1792                 case E1000_RXBUFFER_4096:
1793                         rctl |= E1000_RCTL_SZ_4096;
1794                         break;
1795                 case E1000_RXBUFFER_8192:
1796                         rctl |= E1000_RCTL_SZ_8192;
1797                         break;
1798                 case E1000_RXBUFFER_16384:
1799                         rctl |= E1000_RCTL_SZ_16384;
1800                         break;
1801         }
1802
1803 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1804         /* 82571 and greater support packet-split where the protocol
1805          * header is placed in skb->data and the packet data is
1806          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1807          * In the case of a non-split, skb->data is linearly filled,
1808          * followed by the page buffers.  Therefore, skb->data is
1809          * sized to hold the largest protocol header.
1810          */
1811         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1812         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1813             PAGE_SIZE <= 16384)
1814                 adapter->rx_ps_pages = pages;
1815         else
1816                 adapter->rx_ps_pages = 0;
1817 #endif
1818         if (adapter->rx_ps_pages) {
1819                 /* Configure extra packet-split registers */
1820                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1821                 rfctl |= E1000_RFCTL_EXTEN;
1822                 /* disable IPv6 packet split support */
1823                 rfctl |= E1000_RFCTL_IPV6_DIS;
1824                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1825
1826                 rctl |= E1000_RCTL_DTYP_PS;
1827
1828                 psrctl |= adapter->rx_ps_bsize0 >>
1829                         E1000_PSRCTL_BSIZE0_SHIFT;
1830
1831                 switch (adapter->rx_ps_pages) {
1832                 case 3:
1833                         psrctl |= PAGE_SIZE <<
1834                                 E1000_PSRCTL_BSIZE3_SHIFT;
1835                 case 2:
1836                         psrctl |= PAGE_SIZE <<
1837                                 E1000_PSRCTL_BSIZE2_SHIFT;
1838                 case 1:
1839                         psrctl |= PAGE_SIZE >>
1840                                 E1000_PSRCTL_BSIZE1_SHIFT;
1841                         break;
1842                 }
1843
1844                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1845         }
1846
1847         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1848 }
1849
1850 /**
1851  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1852  * @adapter: board private structure
1853  *
1854  * Configure the Rx unit of the MAC after a reset.
1855  **/
1856
1857 static void
1858 e1000_configure_rx(struct e1000_adapter *adapter)
1859 {
1860         uint64_t rdba;
1861         struct e1000_hw *hw = &adapter->hw;
1862         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1863
1864         if (adapter->rx_ps_pages) {
1865                 /* this is a 32 byte descriptor */
1866                 rdlen = adapter->rx_ring[0].count *
1867                         sizeof(union e1000_rx_desc_packet_split);
1868                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1869                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1870         } else {
1871                 rdlen = adapter->rx_ring[0].count *
1872                         sizeof(struct e1000_rx_desc);
1873                 adapter->clean_rx = e1000_clean_rx_irq;
1874                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1875         }
1876
1877         /* disable receives while setting up the descriptors */
1878         rctl = E1000_READ_REG(hw, RCTL);
1879         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1880
1881         /* set the Receive Delay Timer Register */
1882         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1883
1884         if (hw->mac_type >= e1000_82540) {
1885                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1886                 if (adapter->itr > 1)
1887                         E1000_WRITE_REG(hw, ITR,
1888                                 1000000000 / (adapter->itr * 256));
1889         }
1890
1891         if (hw->mac_type >= e1000_82571) {
1892                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1893                 /* Reset delay timers after every interrupt */
1894                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1895 #ifdef CONFIG_E1000_NAPI
1896                 /* Auto-Mask interrupts upon ICR read. */
1897                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1898 #endif
1899                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1900                 E1000_WRITE_REG(hw, IAM, ~0);
1901                 E1000_WRITE_FLUSH(hw);
1902         }
1903
1904         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1905          * the Base and Length of the Rx Descriptor Ring */
1906         switch (adapter->num_rx_queues) {
1907         case 1:
1908         default:
1909                 rdba = adapter->rx_ring[0].dma;
1910                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1911                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1912                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1913                 E1000_WRITE_REG(hw, RDT, 0);
1914                 E1000_WRITE_REG(hw, RDH, 0);
1915                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1916                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1917                 break;
1918         }
1919
1920         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1921         if (hw->mac_type >= e1000_82543) {
1922                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1923                 if (adapter->rx_csum == TRUE) {
1924                         rxcsum |= E1000_RXCSUM_TUOFL;
1925
1926                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1927                          * Must be used in conjunction with packet-split. */
1928                         if ((hw->mac_type >= e1000_82571) &&
1929                             (adapter->rx_ps_pages)) {
1930                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1931                         }
1932                 } else {
1933                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1934                         /* don't need to clear IPPCSE as it defaults to 0 */
1935                 }
1936                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1937         }
1938
1939         /* Enable Receives */
1940         E1000_WRITE_REG(hw, RCTL, rctl);
1941 }
1942
1943 /**
1944  * e1000_free_tx_resources - Free Tx Resources per Queue
1945  * @adapter: board private structure
1946  * @tx_ring: Tx descriptor ring for a specific queue
1947  *
1948  * Free all transmit software resources
1949  **/
1950
1951 static void
1952 e1000_free_tx_resources(struct e1000_adapter *adapter,
1953                         struct e1000_tx_ring *tx_ring)
1954 {
1955         struct pci_dev *pdev = adapter->pdev;
1956
1957         e1000_clean_tx_ring(adapter, tx_ring);
1958
1959         vfree(tx_ring->buffer_info);
1960         tx_ring->buffer_info = NULL;
1961
1962         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1963
1964         tx_ring->desc = NULL;
1965 }
1966
1967 /**
1968  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1969  * @adapter: board private structure
1970  *
1971  * Free all transmit software resources
1972  **/
1973
1974 void
1975 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1976 {
1977         int i;
1978
1979         for (i = 0; i < adapter->num_tx_queues; i++)
1980                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1981 }
1982
1983 static void
1984 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1985                         struct e1000_buffer *buffer_info)
1986 {
1987         if (buffer_info->dma) {
1988                 pci_unmap_page(adapter->pdev,
1989                                 buffer_info->dma,
1990                                 buffer_info->length,
1991                                 PCI_DMA_TODEVICE);
1992         }
1993         if (buffer_info->skb)
1994                 dev_kfree_skb_any(buffer_info->skb);
1995         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1996 }
1997
1998 /**
1999  * e1000_clean_tx_ring - Free Tx Buffers
2000  * @adapter: board private structure
2001  * @tx_ring: ring to be cleaned
2002  **/
2003
2004 static void
2005 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2006                     struct e1000_tx_ring *tx_ring)
2007 {
2008         struct e1000_buffer *buffer_info;
2009         unsigned long size;
2010         unsigned int i;
2011
2012         /* Free all the Tx ring sk_buffs */
2013
2014         for (i = 0; i < tx_ring->count; i++) {
2015                 buffer_info = &tx_ring->buffer_info[i];
2016                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2017         }
2018
2019         size = sizeof(struct e1000_buffer) * tx_ring->count;
2020         memset(tx_ring->buffer_info, 0, size);
2021
2022         /* Zero out the descriptor ring */
2023
2024         memset(tx_ring->desc, 0, tx_ring->size);
2025
2026         tx_ring->next_to_use = 0;
2027         tx_ring->next_to_clean = 0;
2028         tx_ring->last_tx_tso = 0;
2029
2030         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2031         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2032 }
2033
2034 /**
2035  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2036  * @adapter: board private structure
2037  **/
2038
2039 static void
2040 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2041 {
2042         int i;
2043
2044         for (i = 0; i < adapter->num_tx_queues; i++)
2045                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2046 }
2047
2048 /**
2049  * e1000_free_rx_resources - Free Rx Resources
2050  * @adapter: board private structure
2051  * @rx_ring: ring to clean the resources from
2052  *
2053  * Free all receive software resources
2054  **/
2055
2056 static void
2057 e1000_free_rx_resources(struct e1000_adapter *adapter,
2058                         struct e1000_rx_ring *rx_ring)
2059 {
2060         struct pci_dev *pdev = adapter->pdev;
2061
2062         e1000_clean_rx_ring(adapter, rx_ring);
2063
2064         vfree(rx_ring->buffer_info);
2065         rx_ring->buffer_info = NULL;
2066         kfree(rx_ring->ps_page);
2067         rx_ring->ps_page = NULL;
2068         kfree(rx_ring->ps_page_dma);
2069         rx_ring->ps_page_dma = NULL;
2070
2071         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2072
2073         rx_ring->desc = NULL;
2074 }
2075
2076 /**
2077  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2078  * @adapter: board private structure
2079  *
2080  * Free all receive software resources
2081  **/
2082
2083 void
2084 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2085 {
2086         int i;
2087
2088         for (i = 0; i < adapter->num_rx_queues; i++)
2089                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2090 }
2091
2092 /**
2093  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2094  * @adapter: board private structure
2095  * @rx_ring: ring to free buffers from
2096  **/
2097
2098 static void
2099 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2100                     struct e1000_rx_ring *rx_ring)
2101 {
2102         struct e1000_buffer *buffer_info;
2103         struct e1000_ps_page *ps_page;
2104         struct e1000_ps_page_dma *ps_page_dma;
2105         struct pci_dev *pdev = adapter->pdev;
2106         unsigned long size;
2107         unsigned int i, j;
2108
2109         /* Free all the Rx ring sk_buffs */
2110         for (i = 0; i < rx_ring->count; i++) {
2111                 buffer_info = &rx_ring->buffer_info[i];
2112                 if (buffer_info->skb) {
2113                         pci_unmap_single(pdev,
2114                                          buffer_info->dma,
2115                                          buffer_info->length,
2116                                          PCI_DMA_FROMDEVICE);
2117
2118                         dev_kfree_skb(buffer_info->skb);
2119                         buffer_info->skb = NULL;
2120                 }
2121                 ps_page = &rx_ring->ps_page[i];
2122                 ps_page_dma = &rx_ring->ps_page_dma[i];
2123                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2124                         if (!ps_page->ps_page[j]) break;
2125                         pci_unmap_page(pdev,
2126                                        ps_page_dma->ps_page_dma[j],
2127                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2128                         ps_page_dma->ps_page_dma[j] = 0;
2129                         put_page(ps_page->ps_page[j]);
2130                         ps_page->ps_page[j] = NULL;
2131                 }
2132         }
2133
2134         size = sizeof(struct e1000_buffer) * rx_ring->count;
2135         memset(rx_ring->buffer_info, 0, size);
2136         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2137         memset(rx_ring->ps_page, 0, size);
2138         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2139         memset(rx_ring->ps_page_dma, 0, size);
2140
2141         /* Zero out the descriptor ring */
2142
2143         memset(rx_ring->desc, 0, rx_ring->size);
2144
2145         rx_ring->next_to_clean = 0;
2146         rx_ring->next_to_use = 0;
2147
2148         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2149         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2150 }
2151
2152 /**
2153  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2154  * @adapter: board private structure
2155  **/
2156
2157 static void
2158 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2159 {
2160         int i;
2161
2162         for (i = 0; i < adapter->num_rx_queues; i++)
2163                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2164 }
2165
2166 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2167  * and memory write and invalidate disabled for certain operations
2168  */
2169 static void
2170 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2171 {
2172         struct net_device *netdev = adapter->netdev;
2173         uint32_t rctl;
2174
2175         e1000_pci_clear_mwi(&adapter->hw);
2176
2177         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2178         rctl |= E1000_RCTL_RST;
2179         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2180         E1000_WRITE_FLUSH(&adapter->hw);
2181         mdelay(5);
2182
2183         if (netif_running(netdev))
2184                 e1000_clean_all_rx_rings(adapter);
2185 }
2186
2187 static void
2188 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2189 {
2190         struct net_device *netdev = adapter->netdev;
2191         uint32_t rctl;
2192
2193         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2194         rctl &= ~E1000_RCTL_RST;
2195         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2196         E1000_WRITE_FLUSH(&adapter->hw);
2197         mdelay(5);
2198
2199         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2200                 e1000_pci_set_mwi(&adapter->hw);
2201
2202         if (netif_running(netdev)) {
2203                 /* No need to loop, because 82542 supports only 1 queue */
2204                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2205                 e1000_configure_rx(adapter);
2206                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2207         }
2208 }
2209
2210 /**
2211  * e1000_set_mac - Change the Ethernet Address of the NIC
2212  * @netdev: network interface device structure
2213  * @p: pointer to an address structure
2214  *
2215  * Returns 0 on success, negative on failure
2216  **/
2217
2218 static int
2219 e1000_set_mac(struct net_device *netdev, void *p)
2220 {
2221         struct e1000_adapter *adapter = netdev_priv(netdev);
2222         struct sockaddr *addr = p;
2223
2224         if (!is_valid_ether_addr(addr->sa_data))
2225                 return -EADDRNOTAVAIL;
2226
2227         /* 82542 2.0 needs to be in reset to write receive address registers */
2228
2229         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2230                 e1000_enter_82542_rst(adapter);
2231
2232         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2233         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2234
2235         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2236
2237         /* With 82571 controllers, LAA may be overwritten (with the default)
2238          * due to controller reset from the other port. */
2239         if (adapter->hw.mac_type == e1000_82571) {
2240                 /* activate the work around */
2241                 adapter->hw.laa_is_present = 1;
2242
2243                 /* Hold a copy of the LAA in RAR[14] This is done so that
2244                  * between the time RAR[0] gets clobbered  and the time it
2245                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2246                  * of the RARs and no incoming packets directed to this port
2247                  * are dropped. Eventaully the LAA will be in RAR[0] and
2248                  * RAR[14] */
2249                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2250                                         E1000_RAR_ENTRIES - 1);
2251         }
2252
2253         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2254                 e1000_leave_82542_rst(adapter);
2255
2256         return 0;
2257 }
2258
2259 /**
2260  * e1000_set_multi - Multicast and Promiscuous mode set
2261  * @netdev: network interface device structure
2262  *
2263  * The set_multi entry point is called whenever the multicast address
2264  * list or the network interface flags are updated.  This routine is
2265  * responsible for configuring the hardware for proper multicast,
2266  * promiscuous mode, and all-multi behavior.
2267  **/
2268
2269 static void
2270 e1000_set_multi(struct net_device *netdev)
2271 {
2272         struct e1000_adapter *adapter = netdev_priv(netdev);
2273         struct e1000_hw *hw = &adapter->hw;
2274         struct dev_mc_list *mc_ptr;
2275         uint32_t rctl;
2276         uint32_t hash_value;
2277         int i, rar_entries = E1000_RAR_ENTRIES;
2278         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2279                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2280                                 E1000_NUM_MTA_REGISTERS;
2281
2282         if (adapter->hw.mac_type == e1000_ich8lan)
2283                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2284
2285         /* reserve RAR[14] for LAA over-write work-around */
2286         if (adapter->hw.mac_type == e1000_82571)
2287                 rar_entries--;
2288
2289         /* Check for Promiscuous and All Multicast modes */
2290
2291         rctl = E1000_READ_REG(hw, RCTL);
2292
2293         if (netdev->flags & IFF_PROMISC) {
2294                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2295         } else if (netdev->flags & IFF_ALLMULTI) {
2296                 rctl |= E1000_RCTL_MPE;
2297                 rctl &= ~E1000_RCTL_UPE;
2298         } else {
2299                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2300         }
2301
2302         E1000_WRITE_REG(hw, RCTL, rctl);
2303
2304         /* 82542 2.0 needs to be in reset to write receive address registers */
2305
2306         if (hw->mac_type == e1000_82542_rev2_0)
2307                 e1000_enter_82542_rst(adapter);
2308
2309         /* load the first 14 multicast address into the exact filters 1-14
2310          * RAR 0 is used for the station MAC adddress
2311          * if there are not 14 addresses, go ahead and clear the filters
2312          * -- with 82571 controllers only 0-13 entries are filled here
2313          */
2314         mc_ptr = netdev->mc_list;
2315
2316         for (i = 1; i < rar_entries; i++) {
2317                 if (mc_ptr) {
2318                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2319                         mc_ptr = mc_ptr->next;
2320                 } else {
2321                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2322                         E1000_WRITE_FLUSH(hw);
2323                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2324                         E1000_WRITE_FLUSH(hw);
2325                 }
2326         }
2327
2328         /* clear the old settings from the multicast hash table */
2329
2330         for (i = 0; i < mta_reg_count; i++) {
2331                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2332                 E1000_WRITE_FLUSH(hw);
2333         }
2334
2335         /* load any remaining addresses into the hash table */
2336
2337         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2338                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2339                 e1000_mta_set(hw, hash_value);
2340         }
2341
2342         if (hw->mac_type == e1000_82542_rev2_0)
2343                 e1000_leave_82542_rst(adapter);
2344 }
2345
2346 /* Need to wait a few seconds after link up to get diagnostic information from
2347  * the phy */
2348
2349 static void
2350 e1000_update_phy_info(unsigned long data)
2351 {
2352         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2353         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2354 }
2355
2356 /**
2357  * e1000_82547_tx_fifo_stall - Timer Call-back
2358  * @data: pointer to adapter cast into an unsigned long
2359  **/
2360
2361 static void
2362 e1000_82547_tx_fifo_stall(unsigned long data)
2363 {
2364         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2365         struct net_device *netdev = adapter->netdev;
2366         uint32_t tctl;
2367
2368         if (atomic_read(&adapter->tx_fifo_stall)) {
2369                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2370                     E1000_READ_REG(&adapter->hw, TDH)) &&
2371                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2372                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2373                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2374                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2375                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2376                         E1000_WRITE_REG(&adapter->hw, TCTL,
2377                                         tctl & ~E1000_TCTL_EN);
2378                         E1000_WRITE_REG(&adapter->hw, TDFT,
2379                                         adapter->tx_head_addr);
2380                         E1000_WRITE_REG(&adapter->hw, TDFH,
2381                                         adapter->tx_head_addr);
2382                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2383                                         adapter->tx_head_addr);
2384                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2385                                         adapter->tx_head_addr);
2386                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2387                         E1000_WRITE_FLUSH(&adapter->hw);
2388
2389                         adapter->tx_fifo_head = 0;
2390                         atomic_set(&adapter->tx_fifo_stall, 0);
2391                         netif_wake_queue(netdev);
2392                 } else {
2393                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2394                 }
2395         }
2396 }
2397
2398 /**
2399  * e1000_watchdog - Timer Call-back
2400  * @data: pointer to adapter cast into an unsigned long
2401  **/
2402 static void
2403 e1000_watchdog(unsigned long data)
2404 {
2405         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2406         struct net_device *netdev = adapter->netdev;
2407         struct e1000_tx_ring *txdr = adapter->tx_ring;
2408         uint32_t link, tctl;
2409         int32_t ret_val;
2410
2411         ret_val = e1000_check_for_link(&adapter->hw);
2412         if ((ret_val == E1000_ERR_PHY) &&
2413             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2414             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2415                 /* See e1000_kumeran_lock_loss_workaround() */
2416                 DPRINTK(LINK, INFO,
2417                         "Gigabit has been disabled, downgrading speed\n");
2418         }
2419         if (adapter->hw.mac_type == e1000_82573) {
2420                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2421                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2422                         e1000_update_mng_vlan(adapter);
2423         }
2424
2425         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2426            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2427                 link = !adapter->hw.serdes_link_down;
2428         else
2429                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2430
2431         if (link) {
2432                 if (!netif_carrier_ok(netdev)) {
2433                         boolean_t txb2b = 1;
2434                         e1000_get_speed_and_duplex(&adapter->hw,
2435                                                    &adapter->link_speed,
2436                                                    &adapter->link_duplex);
2437
2438                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2439                                adapter->link_speed,
2440                                adapter->link_duplex == FULL_DUPLEX ?
2441                                "Full Duplex" : "Half Duplex");
2442
2443                         /* tweak tx_queue_len according to speed/duplex
2444                          * and adjust the timeout factor */
2445                         netdev->tx_queue_len = adapter->tx_queue_len;
2446                         adapter->tx_timeout_factor = 1;
2447                         switch (adapter->link_speed) {
2448                         case SPEED_10:
2449                                 txb2b = 0;
2450                                 netdev->tx_queue_len = 10;
2451                                 adapter->tx_timeout_factor = 8;
2452                                 break;
2453                         case SPEED_100:
2454                                 txb2b = 0;
2455                                 netdev->tx_queue_len = 100;
2456                                 /* maybe add some timeout factor ? */
2457                                 break;
2458                         }
2459
2460                         if ((adapter->hw.mac_type == e1000_82571 ||
2461                              adapter->hw.mac_type == e1000_82572) &&
2462                             txb2b == 0) {
2463 #define SPEED_MODE_BIT (1 << 21)
2464                                 uint32_t tarc0;
2465                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2466                                 tarc0 &= ~SPEED_MODE_BIT;
2467                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2468                         }
2469
2470 #ifdef NETIF_F_TSO
2471                         /* disable TSO for pcie and 10/100 speeds, to avoid
2472                          * some hardware issues */
2473                         if (!adapter->tso_force &&
2474                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2475                                 switch (adapter->link_speed) {
2476                                 case SPEED_10:
2477                                 case SPEED_100:
2478                                         DPRINTK(PROBE,INFO,
2479                                         "10/100 speed: disabling TSO\n");
2480                                         netdev->features &= ~NETIF_F_TSO;
2481                                         break;
2482                                 case SPEED_1000:
2483                                         netdev->features |= NETIF_F_TSO;
2484                                         break;
2485                                 default:
2486                                         /* oops */
2487                                         break;
2488                                 }
2489                         }
2490 #endif
2491
2492                         /* enable transmits in the hardware, need to do this
2493                          * after setting TARC0 */
2494                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2495                         tctl |= E1000_TCTL_EN;
2496                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2497
2498                         netif_carrier_on(netdev);
2499                         netif_wake_queue(netdev);
2500                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2501                         adapter->smartspeed = 0;
2502                 }
2503         } else {
2504                 if (netif_carrier_ok(netdev)) {
2505                         adapter->link_speed = 0;
2506                         adapter->link_duplex = 0;
2507                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2508                         netif_carrier_off(netdev);
2509                         netif_stop_queue(netdev);
2510                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2511
2512                         /* 80003ES2LAN workaround--
2513                          * For packet buffer work-around on link down event;
2514                          * disable receives in the ISR and
2515                          * reset device here in the watchdog
2516                          */
2517                         if (adapter->hw.mac_type == e1000_80003es2lan)
2518                                 /* reset device */
2519                                 schedule_work(&adapter->reset_task);
2520                 }
2521
2522                 e1000_smartspeed(adapter);
2523         }
2524
2525         e1000_update_stats(adapter);
2526
2527         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2528         adapter->tpt_old = adapter->stats.tpt;
2529         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2530         adapter->colc_old = adapter->stats.colc;
2531
2532         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2533         adapter->gorcl_old = adapter->stats.gorcl;
2534         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2535         adapter->gotcl_old = adapter->stats.gotcl;
2536
2537         e1000_update_adaptive(&adapter->hw);
2538
2539         if (!netif_carrier_ok(netdev)) {
2540                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2541                         /* We've lost link, so the controller stops DMA,
2542                          * but we've got queued Tx work that's never going
2543                          * to get done, so reset controller to flush Tx.
2544                          * (Do the reset outside of interrupt context). */
2545                         adapter->tx_timeout_count++;
2546                         schedule_work(&adapter->reset_task);
2547                 }
2548         }
2549
2550         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2551         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2552                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2553                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2554                  * else is between 2000-8000. */
2555                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2556                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2557                         adapter->gotcl - adapter->gorcl :
2558                         adapter->gorcl - adapter->gotcl) / 10000;
2559                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2560                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2561         }
2562
2563         /* Cause software interrupt to ensure rx ring is cleaned */
2564         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2565
2566         /* Force detection of hung controller every watchdog period */
2567         adapter->detect_tx_hung = TRUE;
2568
2569         /* With 82571 controllers, LAA may be overwritten due to controller
2570          * reset from the other port. Set the appropriate LAA in RAR[0] */
2571         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2572                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2573
2574         /* Reset the timer */
2575         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2576 }
2577
2578 #define E1000_TX_FLAGS_CSUM             0x00000001
2579 #define E1000_TX_FLAGS_VLAN             0x00000002
2580 #define E1000_TX_FLAGS_TSO              0x00000004
2581 #define E1000_TX_FLAGS_IPV4             0x00000008
2582 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2583 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2584
2585 static int
2586 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2587           struct sk_buff *skb)
2588 {
2589 #ifdef NETIF_F_TSO
2590         struct e1000_context_desc *context_desc;
2591         struct e1000_buffer *buffer_info;
2592         unsigned int i;
2593         uint32_t cmd_length = 0;
2594         uint16_t ipcse = 0, tucse, mss;
2595         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2596         int err;
2597
2598         if (skb_is_gso(skb)) {
2599                 if (skb_header_cloned(skb)) {
2600                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2601                         if (err)
2602                                 return err;
2603                 }
2604
2605                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2606                 mss = skb_shinfo(skb)->gso_size;
2607                 if (skb->protocol == htons(ETH_P_IP)) {
2608                         skb->nh.iph->tot_len = 0;
2609                         skb->nh.iph->check = 0;
2610                         skb->h.th->check =
2611                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2612                                                    skb->nh.iph->daddr,
2613                                                    0,
2614                                                    IPPROTO_TCP,
2615                                                    0);
2616                         cmd_length = E1000_TXD_CMD_IP;
2617                         ipcse = skb->h.raw - skb->data - 1;
2618 #ifdef NETIF_F_TSO_IPV6
2619                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2620                         skb->nh.ipv6h->payload_len = 0;
2621                         skb->h.th->check =
2622                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2623                                                  &skb->nh.ipv6h->daddr,
2624                                                  0,
2625                                                  IPPROTO_TCP,
2626                                                  0);
2627                         ipcse = 0;
2628 #endif
2629                 }
2630                 ipcss = skb->nh.raw - skb->data;
2631                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2632                 tucss = skb->h.raw - skb->data;
2633                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2634                 tucse = 0;
2635
2636                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2637                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2638
2639                 i = tx_ring->next_to_use;
2640                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2641                 buffer_info = &tx_ring->buffer_info[i];
2642
2643                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2644                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2645                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2646                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2647                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2648                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2649                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2650                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2651                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2652
2653                 buffer_info->time_stamp = jiffies;
2654
2655                 if (++i == tx_ring->count) i = 0;
2656                 tx_ring->next_to_use = i;
2657
2658                 return TRUE;
2659         }
2660 #endif
2661
2662         return FALSE;
2663 }
2664
2665 static boolean_t
2666 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2667               struct sk_buff *skb)
2668 {
2669         struct e1000_context_desc *context_desc;
2670         struct e1000_buffer *buffer_info;
2671         unsigned int i;
2672         uint8_t css;
2673
2674         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2675                 css = skb->h.raw - skb->data;
2676
2677                 i = tx_ring->next_to_use;
2678                 buffer_info = &tx_ring->buffer_info[i];
2679                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2680
2681                 context_desc->upper_setup.tcp_fields.tucss = css;
2682                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2683                 context_desc->upper_setup.tcp_fields.tucse = 0;
2684                 context_desc->tcp_seg_setup.data = 0;
2685                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2686
2687                 buffer_info->time_stamp = jiffies;
2688
2689                 if (unlikely(++i == tx_ring->count)) i = 0;
2690                 tx_ring->next_to_use = i;
2691
2692                 return TRUE;
2693         }
2694
2695         return FALSE;
2696 }
2697
2698 #define E1000_MAX_TXD_PWR       12
2699 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2700
2701 static int
2702 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2703              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2704              unsigned int nr_frags, unsigned int mss)
2705 {
2706         struct e1000_buffer *buffer_info;
2707         unsigned int len = skb->len;
2708         unsigned int offset = 0, size, count = 0, i;
2709         unsigned int f;
2710         len -= skb->data_len;
2711
2712         i = tx_ring->next_to_use;
2713
2714         while (len) {
2715                 buffer_info = &tx_ring->buffer_info[i];
2716                 size = min(len, max_per_txd);
2717 #ifdef NETIF_F_TSO
2718                 /* Workaround for Controller erratum --
2719                  * descriptor for non-tso packet in a linear SKB that follows a
2720                  * tso gets written back prematurely before the data is fully
2721                  * DMA'd to the controller */
2722                 if (!skb->data_len && tx_ring->last_tx_tso &&
2723                     !skb_is_gso(skb)) {
2724                         tx_ring->last_tx_tso = 0;
2725                         size -= 4;
2726                 }
2727
2728                 /* Workaround for premature desc write-backs
2729                  * in TSO mode.  Append 4-byte sentinel desc */
2730                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2731                         size -= 4;
2732 #endif
2733                 /* work-around for errata 10 and it applies
2734                  * to all controllers in PCI-X mode
2735                  * The fix is to make sure that the first descriptor of a
2736                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2737                  */
2738                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2739                                 (size > 2015) && count == 0))
2740                         size = 2015;
2741
2742                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2743                  * terminating buffers within evenly-aligned dwords. */
2744                 if (unlikely(adapter->pcix_82544 &&
2745                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2746                    size > 4))
2747                         size -= 4;
2748
2749                 buffer_info->length = size;
2750                 buffer_info->dma =
2751                         pci_map_single(adapter->pdev,
2752                                 skb->data + offset,
2753                                 size,
2754                                 PCI_DMA_TODEVICE);
2755                 buffer_info->time_stamp = jiffies;
2756
2757                 len -= size;
2758                 offset += size;
2759                 count++;
2760                 if (unlikely(++i == tx_ring->count)) i = 0;
2761         }
2762
2763         for (f = 0; f < nr_frags; f++) {
2764                 struct skb_frag_struct *frag;
2765
2766                 frag = &skb_shinfo(skb)->frags[f];
2767                 len = frag->size;
2768                 offset = frag->page_offset;
2769
2770                 while (len) {
2771                         buffer_info = &tx_ring->buffer_info[i];
2772                         size = min(len, max_per_txd);
2773 #ifdef NETIF_F_TSO
2774                         /* Workaround for premature desc write-backs
2775                          * in TSO mode.  Append 4-byte sentinel desc */
2776                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2777                                 size -= 4;
2778 #endif
2779                         /* Workaround for potential 82544 hang in PCI-X.
2780                          * Avoid terminating buffers within evenly-aligned
2781                          * dwords. */
2782                         if (unlikely(adapter->pcix_82544 &&
2783                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2784                            size > 4))
2785                                 size -= 4;
2786
2787                         buffer_info->length = size;
2788                         buffer_info->dma =
2789                                 pci_map_page(adapter->pdev,
2790                                         frag->page,
2791                                         offset,
2792                                         size,
2793                                         PCI_DMA_TODEVICE);
2794                         buffer_info->time_stamp = jiffies;
2795
2796                         len -= size;
2797                         offset += size;
2798                         count++;
2799                         if (unlikely(++i == tx_ring->count)) i = 0;
2800                 }
2801         }
2802
2803         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2804         tx_ring->buffer_info[i].skb = skb;
2805         tx_ring->buffer_info[first].next_to_watch = i;
2806
2807         return count;
2808 }
2809
2810 static void
2811 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2812                int tx_flags, int count)
2813 {
2814         struct e1000_tx_desc *tx_desc = NULL;
2815         struct e1000_buffer *buffer_info;
2816         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2817         unsigned int i;
2818
2819         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2820                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2821                              E1000_TXD_CMD_TSE;
2822                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2823
2824                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2825                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2826         }
2827
2828         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2829                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2830                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2831         }
2832
2833         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2834                 txd_lower |= E1000_TXD_CMD_VLE;
2835                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2836         }
2837
2838         i = tx_ring->next_to_use;
2839
2840         while (count--) {
2841                 buffer_info = &tx_ring->buffer_info[i];
2842                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2843                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2844                 tx_desc->lower.data =
2845                         cpu_to_le32(txd_lower | buffer_info->length);
2846                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2847                 if (unlikely(++i == tx_ring->count)) i = 0;
2848         }
2849
2850         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2851
2852         /* Force memory writes to complete before letting h/w
2853          * know there are new descriptors to fetch.  (Only
2854          * applicable for weak-ordered memory model archs,
2855          * such as IA-64). */
2856         wmb();
2857
2858         tx_ring->next_to_use = i;
2859         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2860 }
2861
2862 /**
2863  * 82547 workaround to avoid controller hang in half-duplex environment.
2864  * The workaround is to avoid queuing a large packet that would span
2865  * the internal Tx FIFO ring boundary by notifying the stack to resend
2866  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2867  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2868  * to the beginning of the Tx FIFO.
2869  **/
2870
2871 #define E1000_FIFO_HDR                  0x10
2872 #define E1000_82547_PAD_LEN             0x3E0
2873
2874 static int
2875 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2876 {
2877         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2878         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2879
2880         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2881
2882         if (adapter->link_duplex != HALF_DUPLEX)
2883                 goto no_fifo_stall_required;
2884
2885         if (atomic_read(&adapter->tx_fifo_stall))
2886                 return 1;
2887
2888         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2889                 atomic_set(&adapter->tx_fifo_stall, 1);
2890                 return 1;
2891         }
2892
2893 no_fifo_stall_required:
2894         adapter->tx_fifo_head += skb_fifo_len;
2895         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2896                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2897         return 0;
2898 }
2899
2900 #define MINIMUM_DHCP_PACKET_SIZE 282
2901 static int
2902 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2903 {
2904         struct e1000_hw *hw =  &adapter->hw;
2905         uint16_t length, offset;
2906         if (vlan_tx_tag_present(skb)) {
2907                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2908                         ( adapter->hw.mng_cookie.status &
2909                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2910                         return 0;
2911         }
2912         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2913                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2914                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2915                         const struct iphdr *ip =
2916                                 (struct iphdr *)((uint8_t *)skb->data+14);
2917                         if (IPPROTO_UDP == ip->protocol) {
2918                                 struct udphdr *udp =
2919                                         (struct udphdr *)((uint8_t *)ip +
2920                                                 (ip->ihl << 2));
2921                                 if (ntohs(udp->dest) == 67) {
2922                                         offset = (uint8_t *)udp + 8 - skb->data;
2923                                         length = skb->len - offset;
2924
2925                                         return e1000_mng_write_dhcp_info(hw,
2926                                                         (uint8_t *)udp + 8,
2927                                                         length);
2928                                 }
2929                         }
2930                 }
2931         }
2932         return 0;
2933 }
2934
2935 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
2936 {
2937         struct e1000_adapter *adapter = netdev_priv(netdev);
2938         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
2939
2940         netif_stop_queue(netdev);
2941         /* Herbert's original patch had:
2942          *  smp_mb__after_netif_stop_queue();
2943          * but since that doesn't exist yet, just open code it. */
2944         smp_mb();
2945
2946         /* We need to check again in a case another CPU has just
2947          * made room available. */
2948         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
2949                 return -EBUSY;
2950
2951         /* A reprieve! */
2952         netif_start_queue(netdev);
2953         return 0;
2954 }
2955
2956 static int e1000_maybe_stop_tx(struct net_device *netdev,
2957                                struct e1000_tx_ring *tx_ring, int size)
2958 {
2959         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
2960                 return 0;
2961         return __e1000_maybe_stop_tx(netdev, size);
2962 }
2963
2964 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2965 static int
2966 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2967 {
2968         struct e1000_adapter *adapter = netdev_priv(netdev);
2969         struct e1000_tx_ring *tx_ring;
2970         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2971         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2972         unsigned int tx_flags = 0;
2973         unsigned int len = skb->len;
2974         unsigned long flags;
2975         unsigned int nr_frags = 0;
2976         unsigned int mss = 0;
2977         int count = 0;
2978         int tso;
2979         unsigned int f;
2980         len -= skb->data_len;
2981
2982         /* This goes back to the question of how to logically map a tx queue
2983          * to a flow.  Right now, performance is impacted slightly negatively
2984          * if using multiple tx queues.  If the stack breaks away from a
2985          * single qdisc implementation, we can look at this again. */
2986         tx_ring = adapter->tx_ring;
2987
2988         if (unlikely(skb->len <= 0)) {
2989                 dev_kfree_skb_any(skb);
2990                 return NETDEV_TX_OK;
2991         }
2992
2993 #ifdef NETIF_F_TSO
2994         mss = skb_shinfo(skb)->gso_size;
2995         /* The controller does a simple calculation to
2996          * make sure there is enough room in the FIFO before
2997          * initiating the DMA for each buffer.  The calc is:
2998          * 4 = ceil(buffer len/mss).  To make sure we don't
2999          * overrun the FIFO, adjust the max buffer len if mss
3000          * drops. */
3001         if (mss) {
3002                 uint8_t hdr_len;
3003                 max_per_txd = min(mss << 2, max_per_txd);
3004                 max_txd_pwr = fls(max_per_txd) - 1;
3005
3006         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3007          * points to just header, pull a few bytes of payload from
3008          * frags into skb->data */
3009                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
3010                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3011                         switch (adapter->hw.mac_type) {
3012                                 unsigned int pull_size;
3013                         case e1000_82571:
3014                         case e1000_82572:
3015                         case e1000_82573:
3016                         case e1000_ich8lan:
3017                                 pull_size = min((unsigned int)4, skb->data_len);
3018                                 if (!__pskb_pull_tail(skb, pull_size)) {
3019                                         DPRINTK(DRV, ERR,
3020                                                 "__pskb_pull_tail failed.\n");
3021                                         dev_kfree_skb_any(skb);
3022                                         return NETDEV_TX_OK;
3023                                 }
3024                                 len = skb->len - skb->data_len;
3025                                 break;
3026                         default:
3027                                 /* do nothing */
3028                                 break;
3029                         }
3030                 }
3031         }
3032
3033         /* reserve a descriptor for the offload context */
3034         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3035                 count++;
3036         count++;
3037 #else
3038         if (skb->ip_summed == CHECKSUM_PARTIAL)
3039                 count++;
3040 #endif
3041
3042 #ifdef NETIF_F_TSO
3043         /* Controller Erratum workaround */
3044         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3045                 count++;
3046 #endif
3047
3048         count += TXD_USE_COUNT(len, max_txd_pwr);
3049
3050         if (adapter->pcix_82544)
3051                 count++;
3052
3053         /* work-around for errata 10 and it applies to all controllers
3054          * in PCI-X mode, so add one more descriptor to the count
3055          */
3056         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3057                         (len > 2015)))
3058                 count++;
3059
3060         nr_frags = skb_shinfo(skb)->nr_frags;
3061         for (f = 0; f < nr_frags; f++)
3062                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3063                                        max_txd_pwr);
3064         if (adapter->pcix_82544)
3065                 count += nr_frags;
3066
3067
3068         if (adapter->hw.tx_pkt_filtering &&
3069             (adapter->hw.mac_type == e1000_82573))
3070                 e1000_transfer_dhcp_info(adapter, skb);
3071
3072         local_irq_save(flags);
3073         if (!spin_trylock(&tx_ring->tx_lock)) {
3074                 /* Collision - tell upper layer to requeue */
3075                 local_irq_restore(flags);
3076                 return NETDEV_TX_LOCKED;
3077         }
3078
3079         /* need: count + 2 desc gap to keep tail from touching
3080          * head, otherwise try next time */
3081         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3082                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3083                 return NETDEV_TX_BUSY;
3084         }
3085
3086         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3087                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3088                         netif_stop_queue(netdev);
3089                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3090                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3091                         return NETDEV_TX_BUSY;
3092                 }
3093         }
3094
3095         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3096                 tx_flags |= E1000_TX_FLAGS_VLAN;
3097                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3098         }
3099
3100         first = tx_ring->next_to_use;
3101
3102         tso = e1000_tso(adapter, tx_ring, skb);
3103         if (tso < 0) {
3104                 dev_kfree_skb_any(skb);
3105                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3106                 return NETDEV_TX_OK;
3107         }
3108
3109         if (likely(tso)) {
3110                 tx_ring->last_tx_tso = 1;
3111                 tx_flags |= E1000_TX_FLAGS_TSO;
3112         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3113                 tx_flags |= E1000_TX_FLAGS_CSUM;
3114
3115         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3116          * 82571 hardware supports TSO capabilities for IPv6 as well...
3117          * no longer assume, we must. */
3118         if (likely(skb->protocol == htons(ETH_P_IP)))
3119                 tx_flags |= E1000_TX_FLAGS_IPV4;
3120
3121         e1000_tx_queue(adapter, tx_ring, tx_flags,
3122                        e1000_tx_map(adapter, tx_ring, skb, first,
3123                                     max_per_txd, nr_frags, mss));
3124
3125         netdev->trans_start = jiffies;
3126
3127         /* Make sure there is space in the ring for the next send. */
3128         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3129
3130         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3131         return NETDEV_TX_OK;
3132 }
3133
3134 /**
3135  * e1000_tx_timeout - Respond to a Tx Hang
3136  * @netdev: network interface device structure
3137  **/
3138
3139 static void
3140 e1000_tx_timeout(struct net_device *netdev)
3141 {
3142         struct e1000_adapter *adapter = netdev_priv(netdev);
3143
3144         /* Do the reset outside of interrupt context */
3145         adapter->tx_timeout_count++;
3146         schedule_work(&adapter->reset_task);
3147 }
3148
3149 static void
3150 e1000_reset_task(struct net_device *netdev)
3151 {
3152         struct e1000_adapter *adapter = netdev_priv(netdev);
3153
3154         e1000_reinit_locked(adapter);
3155 }
3156
3157 /**
3158  * e1000_get_stats - Get System Network Statistics
3159  * @netdev: network interface device structure
3160  *
3161  * Returns the address of the device statistics structure.
3162  * The statistics are actually updated from the timer callback.
3163  **/
3164
3165 static struct net_device_stats *
3166 e1000_get_stats(struct net_device *netdev)
3167 {
3168         struct e1000_adapter *adapter = netdev_priv(netdev);
3169
3170         /* only return the current stats */
3171         return &adapter->net_stats;
3172 }
3173
3174 /**
3175  * e1000_change_mtu - Change the Maximum Transfer Unit
3176  * @netdev: network interface device structure
3177  * @new_mtu: new value for maximum frame size
3178  *
3179  * Returns 0 on success, negative on failure
3180  **/
3181
3182 static int
3183 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3184 {
3185         struct e1000_adapter *adapter = netdev_priv(netdev);
3186         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3187         uint16_t eeprom_data = 0;
3188
3189         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3190             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3191                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3192                 return -EINVAL;
3193         }
3194
3195         /* Adapter-specific max frame size limits. */
3196         switch (adapter->hw.mac_type) {
3197         case e1000_undefined ... e1000_82542_rev2_1:
3198         case e1000_ich8lan:
3199                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3200                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3201                         return -EINVAL;
3202                 }
3203                 break;
3204         case e1000_82573:
3205                 /* Jumbo Frames not supported if:
3206                  * - this is not an 82573L device
3207                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3208                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3209                                   &eeprom_data);
3210                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3211                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3212                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3213                                 DPRINTK(PROBE, ERR,
3214                                         "Jumbo Frames not supported.\n");
3215                                 return -EINVAL;
3216                         }
3217                         break;
3218                 }
3219                 /* ERT will be enabled later to enable wire speed receives */
3220
3221                 /* fall through to get support */
3222         case e1000_82571:
3223         case e1000_82572:
3224         case e1000_80003es2lan:
3225 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3226                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3227                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3228                         return -EINVAL;
3229                 }
3230                 break;
3231         default:
3232                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3233                 break;
3234         }
3235
3236         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3237          * means we reserve 2 more, this pushes us to allocate from the next
3238          * larger slab size
3239          * i.e. RXBUFFER_2048 --> size-4096 slab */
3240
3241         if (max_frame <= E1000_RXBUFFER_256)
3242                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3243         else if (max_frame <= E1000_RXBUFFER_512)
3244                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3245         else if (max_frame <= E1000_RXBUFFER_1024)
3246                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3247         else if (max_frame <= E1000_RXBUFFER_2048)
3248                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3249         else if (max_frame <= E1000_RXBUFFER_4096)
3250                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3251         else if (max_frame <= E1000_RXBUFFER_8192)
3252                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3253         else if (max_frame <= E1000_RXBUFFER_16384)
3254                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3255
3256         /* adjust allocation if LPE protects us, and we aren't using SBP */
3257         if (!adapter->hw.tbi_compatibility_on &&
3258             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3259              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3260                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3261
3262         netdev->mtu = new_mtu;
3263
3264         if (netif_running(netdev))
3265                 e1000_reinit_locked(adapter);
3266
3267         adapter->hw.max_frame_size = max_frame;
3268
3269         return 0;
3270 }
3271
3272 /**
3273  * e1000_update_stats - Update the board statistics counters
3274  * @adapter: board private structure
3275  **/
3276
3277 void
3278 e1000_update_stats(struct e1000_adapter *adapter)
3279 {
3280         struct e1000_hw *hw = &adapter->hw;
3281         struct pci_dev *pdev = adapter->pdev;
3282         unsigned long flags;
3283         uint16_t phy_tmp;
3284
3285 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3286
3287         /*
3288          * Prevent stats update while adapter is being reset, or if the pci
3289          * connection is down.
3290          */
3291         if (adapter->link_speed == 0)
3292                 return;
3293         if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3294                 return;
3295
3296         spin_lock_irqsave(&adapter->stats_lock, flags);
3297
3298         /* these counters are modified from e1000_adjust_tbi_stats,
3299          * called from the interrupt context, so they must only
3300          * be written while holding adapter->stats_lock
3301          */
3302
3303         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3304         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3305         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3306         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3307         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3308         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3309         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3310
3311         if (adapter->hw.mac_type != e1000_ich8lan) {
3312         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3313         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3314         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3315         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3316         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3317         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3318         }
3319
3320         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3321         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3322         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3323         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3324         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3325         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3326         adapter->stats.dc += E1000_READ_REG(hw, DC);
3327         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3328         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3329         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3330         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3331         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3332         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3333         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3334         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3335         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3336         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3337         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3338         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3339         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3340         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3341         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3342         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3343         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3344         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3345         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3346
3347         if (adapter->hw.mac_type != e1000_ich8lan) {
3348         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3349         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3350         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3351         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3352         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3353         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3354         }
3355
3356         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3357         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3358
3359         /* used for adaptive IFS */
3360
3361         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3362         adapter->stats.tpt += hw->tx_packet_delta;
3363         hw->collision_delta = E1000_READ_REG(hw, COLC);
3364         adapter->stats.colc += hw->collision_delta;
3365
3366         if (hw->mac_type >= e1000_82543) {
3367                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3368                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3369                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3370                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3371                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3372                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3373         }
3374         if (hw->mac_type > e1000_82547_rev_2) {
3375                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3376                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3377
3378                 if (adapter->hw.mac_type != e1000_ich8lan) {
3379                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3380                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3381                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3382                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3383                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3384                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3385                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3386                 }
3387         }
3388
3389         /* Fill out the OS statistics structure */
3390
3391         adapter->net_stats.rx_packets = adapter->stats.gprc;
3392         adapter->net_stats.tx_packets = adapter->stats.gptc;
3393         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3394         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3395         adapter->net_stats.multicast = adapter->stats.mprc;
3396         adapter->net_stats.collisions = adapter->stats.colc;
3397
3398         /* Rx Errors */
3399
3400         /* RLEC on some newer hardware can be incorrect so build
3401         * our own version based on RUC and ROC */
3402         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3403                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3404                 adapter->stats.ruc + adapter->stats.roc +
3405                 adapter->stats.cexterr;
3406         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3407         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3408         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3409         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3410         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3411
3412         /* Tx Errors */
3413         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3414         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3415         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3416         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3417         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3418
3419         /* Tx Dropped needs to be maintained elsewhere */
3420
3421         /* Phy Stats */
3422
3423         if (hw->media_type == e1000_media_type_copper) {
3424                 if ((adapter->link_speed == SPEED_1000) &&
3425                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3426                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3427                         adapter->phy_stats.idle_errors += phy_tmp;
3428                 }
3429
3430                 if ((hw->mac_type <= e1000_82546) &&
3431                    (hw->phy_type == e1000_phy_m88) &&
3432                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3433                         adapter->phy_stats.receive_errors += phy_tmp;
3434         }
3435
3436         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3437 }
3438
3439 /**
3440  * e1000_intr - Interrupt Handler
3441  * @irq: interrupt number
3442  * @data: pointer to a network interface device structure
3443  **/
3444
3445 static irqreturn_t
3446 e1000_intr(int irq, void *data)
3447 {
3448         struct net_device *netdev = data;
3449         struct e1000_adapter *adapter = netdev_priv(netdev);
3450         struct e1000_hw *hw = &adapter->hw;
3451         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3452 #ifndef CONFIG_E1000_NAPI
3453         int i;
3454 #else
3455         /* Interrupt Auto-Mask...upon reading ICR,
3456          * interrupts are masked.  No need for the
3457          * IMC write, but it does mean we should
3458          * account for it ASAP. */
3459         if (likely(hw->mac_type >= e1000_82571))
3460                 atomic_inc(&adapter->irq_sem);
3461 #endif
3462
3463         if (unlikely(!icr)) {
3464 #ifdef CONFIG_E1000_NAPI
3465                 if (hw->mac_type >= e1000_82571)
3466                         e1000_irq_enable(adapter);
3467 #endif
3468                 return IRQ_NONE;  /* Not our interrupt */
3469         }
3470
3471         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3472                 hw->get_link_status = 1;
3473                 /* 80003ES2LAN workaround--
3474                  * For packet buffer work-around on link down event;
3475                  * disable receives here in the ISR and
3476                  * reset adapter in watchdog
3477                  */
3478                 if (netif_carrier_ok(netdev) &&
3479                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3480                         /* disable receives */
3481                         rctl = E1000_READ_REG(hw, RCTL);
3482                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3483                 }
3484                 /* guard against interrupt when we're going down */
3485                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3486                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3487         }
3488
3489 #ifdef CONFIG_E1000_NAPI
3490         if (unlikely(hw->mac_type < e1000_82571)) {
3491                 atomic_inc(&adapter->irq_sem);
3492                 E1000_WRITE_REG(hw, IMC, ~0);
3493                 E1000_WRITE_FLUSH(hw);
3494         }
3495         if (likely(netif_rx_schedule_prep(netdev)))
3496                 __netif_rx_schedule(netdev);
3497         else
3498                 e1000_irq_enable(adapter);
3499 #else
3500         /* Writing IMC and IMS is needed for 82547.
3501          * Due to Hub Link bus being occupied, an interrupt
3502          * de-assertion message is not able to be sent.
3503          * When an interrupt assertion message is generated later,
3504          * two messages are re-ordered and sent out.
3505          * That causes APIC to think 82547 is in de-assertion
3506          * state, while 82547 is in assertion state, resulting
3507          * in dead lock. Writing IMC forces 82547 into
3508          * de-assertion state.
3509          */
3510         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3511                 atomic_inc(&adapter->irq_sem);
3512                 E1000_WRITE_REG(hw, IMC, ~0);
3513         }
3514
3515         for (i = 0; i < E1000_MAX_INTR; i++)
3516                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3517                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3518                         break;
3519
3520         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3521                 e1000_irq_enable(adapter);
3522
3523 #endif
3524
3525         return IRQ_HANDLED;
3526 }
3527
3528 #ifdef CONFIG_E1000_NAPI
3529 /**
3530  * e1000_clean - NAPI Rx polling callback
3531  * @adapter: board private structure
3532  **/
3533
3534 static int
3535 e1000_clean(struct net_device *poll_dev, int *budget)
3536 {
3537         struct e1000_adapter *adapter;
3538         int work_to_do = min(*budget, poll_dev->quota);
3539         int tx_cleaned = 0, work_done = 0;
3540
3541         /* Must NOT use netdev_priv macro here. */
3542         adapter = poll_dev->priv;
3543
3544         /* Keep link state information with original netdev */
3545         if (!netif_carrier_ok(poll_dev))
3546                 goto quit_polling;
3547
3548         /* e1000_clean is called per-cpu.  This lock protects
3549          * tx_ring[0] from being cleaned by multiple cpus
3550          * simultaneously.  A failure obtaining the lock means
3551          * tx_ring[0] is currently being cleaned anyway. */
3552         if (spin_trylock(&adapter->tx_queue_lock)) {
3553                 tx_cleaned = e1000_clean_tx_irq(adapter,
3554                                                 &adapter->tx_ring[0]);
3555                 spin_unlock(&adapter->tx_queue_lock);
3556         }
3557
3558         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3559                           &work_done, work_to_do);
3560
3561         *budget -= work_done;
3562         poll_dev->quota -= work_done;
3563
3564         /* If no Tx and not enough Rx work done, exit the polling mode */
3565         if ((!tx_cleaned && (work_done == 0)) ||
3566            !netif_running(poll_dev)) {
3567 quit_polling:
3568                 netif_rx_complete(poll_dev);
3569                 e1000_irq_enable(adapter);
3570                 return 0;
3571         }
3572
3573         return 1;
3574 }
3575
3576 #endif
3577 /**
3578  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3579  * @adapter: board private structure
3580  **/
3581
3582 static boolean_t
3583 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3584                    struct e1000_tx_ring *tx_ring)
3585 {
3586         struct net_device *netdev = adapter->netdev;
3587         struct e1000_tx_desc *tx_desc, *eop_desc;
3588         struct e1000_buffer *buffer_info;
3589         unsigned int i, eop;
3590 #ifdef CONFIG_E1000_NAPI
3591         unsigned int count = 0;
3592 #endif
3593         boolean_t cleaned = FALSE;
3594
3595         i = tx_ring->next_to_clean;
3596         eop = tx_ring->buffer_info[i].next_to_watch;
3597         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3598
3599         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3600                 for (cleaned = FALSE; !cleaned; ) {
3601                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3602                         buffer_info = &tx_ring->buffer_info[i];
3603                         cleaned = (i == eop);
3604
3605                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3606                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3607
3608                         if (unlikely(++i == tx_ring->count)) i = 0;
3609                 }
3610
3611
3612                 eop = tx_ring->buffer_info[i].next_to_watch;
3613                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3614 #ifdef CONFIG_E1000_NAPI
3615 #define E1000_TX_WEIGHT 64
3616                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3617                 if (count++ == E1000_TX_WEIGHT) break;
3618 #endif
3619         }
3620
3621         tx_ring->next_to_clean = i;
3622
3623 #define TX_WAKE_THRESHOLD 32
3624         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3625                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3626                 /* Make sure that anybody stopping the queue after this
3627                  * sees the new next_to_clean.
3628                  */
3629                 smp_mb();
3630                 if (netif_queue_stopped(netdev))
3631                         netif_wake_queue(netdev);
3632         }
3633
3634         if (adapter->detect_tx_hung) {
3635                 /* Detect a transmit hang in hardware, this serializes the
3636                  * check with the clearing of time_stamp and movement of i */
3637                 adapter->detect_tx_hung = FALSE;
3638                 if (tx_ring->buffer_info[eop].dma &&
3639                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3640                                (adapter->tx_timeout_factor * HZ))
3641                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3642                          E1000_STATUS_TXOFF)) {
3643
3644                         /* detected Tx unit hang */
3645                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3646                                         "  Tx Queue             <%lu>\n"
3647                                         "  TDH                  <%x>\n"
3648                                         "  TDT                  <%x>\n"
3649                                         "  next_to_use          <%x>\n"
3650                                         "  next_to_clean        <%x>\n"
3651                                         "buffer_info[next_to_clean]\n"
3652                                         "  time_stamp           <%lx>\n"
3653                                         "  next_to_watch        <%x>\n"
3654                                         "  jiffies              <%lx>\n"
3655                                         "  next_to_watch.status <%x>\n",
3656                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3657                                         sizeof(struct e1000_tx_ring)),
3658                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3659                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3660                                 tx_ring->next_to_use,
3661                                 tx_ring->next_to_clean,
3662                                 tx_ring->buffer_info[eop].time_stamp,
3663                                 eop,
3664                                 jiffies,
3665                                 eop_desc->upper.fields.status);
3666                         netif_stop_queue(netdev);
3667                 }
3668         }
3669         return cleaned;
3670 }
3671
3672 /**
3673  * e1000_rx_checksum - Receive Checksum Offload for 82543
3674  * @adapter:     board private structure
3675  * @status_err:  receive descriptor status and error fields
3676  * @csum:        receive descriptor csum field
3677  * @sk_buff:     socket buffer with received data
3678  **/
3679
3680 static void
3681 e1000_rx_checksum(struct e1000_adapter *adapter,
3682                   uint32_t status_err, uint32_t csum,
3683                   struct sk_buff *skb)
3684 {
3685         uint16_t status = (uint16_t)status_err;
3686         uint8_t errors = (uint8_t)(status_err >> 24);
3687         skb->ip_summed = CHECKSUM_NONE;
3688
3689         /* 82543 or newer only */
3690         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3691         /* Ignore Checksum bit is set */
3692         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3693         /* TCP/UDP checksum error bit is set */
3694         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3695                 /* let the stack verify checksum errors */
3696                 adapter->hw_csum_err++;
3697                 return;
3698         }
3699         /* TCP/UDP Checksum has not been calculated */
3700         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3701                 if (!(status & E1000_RXD_STAT_TCPCS))
3702                         return;
3703         } else {
3704                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3705                         return;
3706         }
3707         /* It must be a TCP or UDP packet with a valid checksum */
3708         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3709                 /* TCP checksum is good */
3710                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3711         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3712                 /* IP fragment with UDP payload */
3713                 /* Hardware complements the payload checksum, so we undo it
3714                  * and then put the value in host order for further stack use.
3715                  */
3716                 csum = ntohl(csum ^ 0xFFFF);
3717                 skb->csum = csum;
3718                 skb->ip_summed = CHECKSUM_COMPLETE;
3719         }
3720         adapter->hw_csum_good++;
3721 }
3722
3723 /**
3724  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3725  * @adapter: board private structure
3726  **/
3727
3728 static boolean_t
3729 #ifdef CONFIG_E1000_NAPI
3730 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3731                    struct e1000_rx_ring *rx_ring,
3732                    int *work_done, int work_to_do)
3733 #else
3734 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3735                    struct e1000_rx_ring *rx_ring)
3736 #endif
3737 {
3738         struct net_device *netdev = adapter->netdev;
3739         struct pci_dev *pdev = adapter->pdev;
3740         struct e1000_rx_desc *rx_desc, *next_rxd;
3741         struct e1000_buffer *buffer_info, *next_buffer;
3742         unsigned long flags;
3743         uint32_t length;
3744         uint8_t last_byte;
3745         unsigned int i;
3746         int cleaned_count = 0;
3747         boolean_t cleaned = FALSE;
3748
3749         i = rx_ring->next_to_clean;
3750         rx_desc = E1000_RX_DESC(*rx_ring, i);
3751         buffer_info = &rx_ring->buffer_info[i];
3752
3753         while (rx_desc->status & E1000_RXD_STAT_DD) {
3754                 struct sk_buff *skb;
3755                 u8 status;
3756 #ifdef CONFIG_E1000_NAPI
3757                 if (*work_done >= work_to_do)
3758                         break;
3759                 (*work_done)++;
3760 #endif
3761                 status = rx_desc->status;
3762                 skb = buffer_info->skb;
3763                 buffer_info->skb = NULL;
3764
3765                 prefetch(skb->data - NET_IP_ALIGN);
3766
3767                 if (++i == rx_ring->count) i = 0;
3768                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3769                 prefetch(next_rxd);
3770
3771                 next_buffer = &rx_ring->buffer_info[i];
3772
3773                 cleaned = TRUE;
3774                 cleaned_count++;
3775                 pci_unmap_single(pdev,
3776                                  buffer_info->dma,
3777                                  buffer_info->length,
3778                                  PCI_DMA_FROMDEVICE);
3779
3780                 length = le16_to_cpu(rx_desc->length);
3781
3782                 /* adjust length to remove Ethernet CRC */
3783                 length -= 4;
3784
3785                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3786                         /* All receives must fit into a single buffer */
3787                         E1000_DBG("%s: Receive packet consumed multiple"
3788                                   " buffers\n", netdev->name);
3789                         /* recycle */
3790                         buffer_info->skb = skb;
3791                         goto next_desc;
3792                 }
3793
3794                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3795                         last_byte = *(skb->data + length - 1);
3796                         if (TBI_ACCEPT(&adapter->hw, status,
3797                                       rx_desc->errors, length, last_byte)) {
3798                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3799                                 e1000_tbi_adjust_stats(&adapter->hw,
3800                                                        &adapter->stats,
3801                                                        length, skb->data);
3802                                 spin_unlock_irqrestore(&adapter->stats_lock,
3803                                                        flags);
3804                                 length--;
3805                         } else {
3806                                 /* recycle */
3807                                 buffer_info->skb = skb;
3808                                 goto next_desc;
3809                         }
3810                 }
3811
3812                 /* code added for copybreak, this should improve
3813                  * performance for small packets with large amounts
3814                  * of reassembly being done in the stack */
3815 #define E1000_CB_LENGTH 256
3816                 if (length < E1000_CB_LENGTH) {
3817                         struct sk_buff *new_skb =
3818                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
3819                         if (new_skb) {
3820                                 skb_reserve(new_skb, NET_IP_ALIGN);
3821                                 memcpy(new_skb->data - NET_IP_ALIGN,
3822                                        skb->data - NET_IP_ALIGN,
3823                                        length + NET_IP_ALIGN);
3824                                 /* save the skb in buffer_info as good */
3825                                 buffer_info->skb = skb;
3826                                 skb = new_skb;
3827                                 skb_put(skb, length);
3828                         }
3829                 } else
3830                         skb_put(skb, length);
3831
3832                 /* end copybreak code */
3833
3834                 /* Receive Checksum Offload */
3835                 e1000_rx_checksum(adapter,
3836                                   (uint32_t)(status) |
3837                                   ((uint32_t)(rx_desc->errors) << 24),
3838                                   le16_to_cpu(rx_desc->csum), skb);
3839
3840                 skb->protocol = eth_type_trans(skb, netdev);
3841 #ifdef CONFIG_E1000_NAPI
3842                 if (unlikely(adapter->vlgrp &&
3843                             (status & E1000_RXD_STAT_VP))) {
3844                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3845                                                  le16_to_cpu(rx_desc->special) &
3846                                                  E1000_RXD_SPC_VLAN_MASK);
3847                 } else {
3848                         netif_receive_skb(skb);
3849                 }
3850 #else /* CONFIG_E1000_NAPI */
3851                 if (unlikely(adapter->vlgrp &&
3852                             (status & E1000_RXD_STAT_VP))) {
3853                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3854                                         le16_to_cpu(rx_desc->special) &
3855                                         E1000_RXD_SPC_VLAN_MASK);
3856                 } else {
3857                         netif_rx(skb);
3858                 }
3859 #endif /* CONFIG_E1000_NAPI */
3860                 netdev->last_rx = jiffies;
3861
3862 next_desc:
3863                 rx_desc->status = 0;
3864
3865                 /* return some buffers to hardware, one at a time is too slow */
3866                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3867                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3868                         cleaned_count = 0;
3869                 }
3870
3871                 /* use prefetched values */
3872                 rx_desc = next_rxd;
3873                 buffer_info = next_buffer;
3874         }
3875         rx_ring->next_to_clean = i;
3876
3877         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3878         if (cleaned_count)
3879                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3880
3881         return cleaned;
3882 }
3883
3884 /**
3885  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3886  * @adapter: board private structure
3887  **/
3888
3889 static boolean_t
3890 #ifdef CONFIG_E1000_NAPI
3891 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3892                       struct e1000_rx_ring *rx_ring,
3893                       int *work_done, int work_to_do)
3894 #else
3895 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3896                       struct e1000_rx_ring *rx_ring)
3897 #endif
3898 {
3899         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3900         struct net_device *netdev = adapter->netdev;
3901         struct pci_dev *pdev = adapter->pdev;
3902         struct e1000_buffer *buffer_info, *next_buffer;
3903         struct e1000_ps_page *ps_page;
3904         struct e1000_ps_page_dma *ps_page_dma;
3905         struct sk_buff *skb;
3906         unsigned int i, j;
3907         uint32_t length, staterr;
3908         int cleaned_count = 0;
3909         boolean_t cleaned = FALSE;
3910
3911         i = rx_ring->next_to_clean;
3912         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3913         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3914         buffer_info = &rx_ring->buffer_info[i];
3915
3916         while (staterr & E1000_RXD_STAT_DD) {
3917                 ps_page = &rx_ring->ps_page[i];
3918                 ps_page_dma = &rx_ring->ps_page_dma[i];
3919 #ifdef CONFIG_E1000_NAPI
3920                 if (unlikely(*work_done >= work_to_do))
3921                         break;
3922                 (*work_done)++;
3923 #endif
3924                 skb = buffer_info->skb;
3925
3926                 /* in the packet split case this is header only */
3927                 prefetch(skb->data - NET_IP_ALIGN);
3928
3929                 if (++i == rx_ring->count) i = 0;
3930                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3931                 prefetch(next_rxd);
3932
3933                 next_buffer = &rx_ring->buffer_info[i];
3934
3935                 cleaned = TRUE;
3936                 cleaned_count++;
3937                 pci_unmap_single(pdev, buffer_info->dma,
3938                                  buffer_info->length,
3939                                  PCI_DMA_FROMDEVICE);
3940
3941                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3942                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3943                                   " the full packet\n", netdev->name);
3944                         dev_kfree_skb_irq(skb);
3945                         goto next_desc;
3946                 }
3947
3948                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3949                         dev_kfree_skb_irq(skb);
3950                         goto next_desc;
3951                 }
3952
3953                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3954
3955                 if (unlikely(!length)) {
3956                         E1000_DBG("%s: Last part of the packet spanning"
3957                                   " multiple descriptors\n", netdev->name);
3958                         dev_kfree_skb_irq(skb);
3959                         goto next_desc;
3960                 }
3961
3962                 /* Good Receive */
3963                 skb_put(skb, length);
3964
3965                 {
3966                 /* this looks ugly, but it seems compiler issues make it
3967                    more efficient than reusing j */
3968                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3969
3970                 /* page alloc/put takes too long and effects small packet
3971                  * throughput, so unsplit small packets and save the alloc/put*/
3972                 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
3973                         u8 *vaddr;
3974                         /* there is no documentation about how to call
3975                          * kmap_atomic, so we can't hold the mapping
3976                          * very long */
3977                         pci_dma_sync_single_for_cpu(pdev,
3978                                 ps_page_dma->ps_page_dma[0],
3979                                 PAGE_SIZE,
3980                                 PCI_DMA_FROMDEVICE);
3981                         vaddr = kmap_atomic(ps_page->ps_page[0],
3982                                             KM_SKB_DATA_SOFTIRQ);
3983                         memcpy(skb->tail, vaddr, l1);
3984                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3985                         pci_dma_sync_single_for_device(pdev,
3986                                 ps_page_dma->ps_page_dma[0],
3987                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3988                         /* remove the CRC */
3989                         l1 -= 4;
3990                         skb_put(skb, l1);
3991                         goto copydone;
3992                 } /* if */
3993                 }
3994
3995                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3996                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3997                                 break;
3998                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3999                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4000                         ps_page_dma->ps_page_dma[j] = 0;
4001                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4002                                            length);
4003                         ps_page->ps_page[j] = NULL;
4004                         skb->len += length;
4005                         skb->data_len += length;
4006                         skb->truesize += length;
4007                 }
4008
4009                 /* strip the ethernet crc, problem is we're using pages now so
4010                  * this whole operation can get a little cpu intensive */
4011                 pskb_trim(skb, skb->len - 4);
4012
4013 copydone:
4014                 e1000_rx_checksum(adapter, staterr,
4015                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4016                 skb->protocol = eth_type_trans(skb, netdev);
4017
4018                 if (likely(rx_desc->wb.upper.header_status &
4019                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4020                         adapter->rx_hdr_split++;
4021 #ifdef CONFIG_E1000_NAPI
4022                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4023                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4024                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4025                                 E1000_RXD_SPC_VLAN_MASK);
4026                 } else {
4027                         netif_receive_skb(skb);
4028                 }
4029 #else /* CONFIG_E1000_NAPI */
4030                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4031                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4032                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4033                                 E1000_RXD_SPC_VLAN_MASK);
4034                 } else {
4035                         netif_rx(skb);
4036                 }
4037 #endif /* CONFIG_E1000_NAPI */
4038                 netdev->last_rx = jiffies;
4039
4040 next_desc:
4041                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4042                 buffer_info->skb = NULL;
4043
4044                 /* return some buffers to hardware, one at a time is too slow */
4045                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4046                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4047                         cleaned_count = 0;
4048                 }
4049
4050                 /* use prefetched values */
4051                 rx_desc = next_rxd;
4052                 buffer_info = next_buffer;
4053
4054                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4055         }
4056         rx_ring->next_to_clean = i;
4057
4058         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4059         if (cleaned_count)
4060                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4061
4062         return cleaned;
4063 }
4064
4065 /**
4066  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4067  * @adapter: address of board private structure
4068  **/
4069
4070 static void
4071 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4072                        struct e1000_rx_ring *rx_ring,
4073                        int cleaned_count)
4074 {
4075         struct net_device *netdev = adapter->netdev;
4076         struct pci_dev *pdev = adapter->pdev;
4077         struct e1000_rx_desc *rx_desc;
4078         struct e1000_buffer *buffer_info;
4079         struct sk_buff *skb;
4080         unsigned int i;
4081         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4082
4083         i = rx_ring->next_to_use;
4084         buffer_info = &rx_ring->buffer_info[i];
4085
4086         while (cleaned_count--) {
4087                 skb = buffer_info->skb;
4088                 if (skb) {
4089                         skb_trim(skb, 0);
4090                         goto map_skb;
4091                 }
4092
4093                 skb = netdev_alloc_skb(netdev, bufsz);
4094                 if (unlikely(!skb)) {
4095                         /* Better luck next round */
4096                         adapter->alloc_rx_buff_failed++;
4097                         break;
4098                 }
4099
4100                 /* Fix for errata 23, can't cross 64kB boundary */
4101                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4102                         struct sk_buff *oldskb = skb;
4103                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4104                                              "at %p\n", bufsz, skb->data);
4105                         /* Try again, without freeing the previous */
4106                         skb = netdev_alloc_skb(netdev, bufsz);
4107                         /* Failed allocation, critical failure */
4108                         if (!skb) {
4109                                 dev_kfree_skb(oldskb);
4110                                 break;
4111                         }
4112
4113                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4114                                 /* give up */
4115                                 dev_kfree_skb(skb);
4116                                 dev_kfree_skb(oldskb);
4117                                 break; /* while !buffer_info->skb */
4118                         }
4119
4120                         /* Use new allocation */
4121                         dev_kfree_skb(oldskb);
4122                 }
4123                 /* Make buffer alignment 2 beyond a 16 byte boundary
4124                  * this will result in a 16 byte aligned IP header after
4125                  * the 14 byte MAC header is removed
4126                  */
4127                 skb_reserve(skb, NET_IP_ALIGN);
4128
4129                 buffer_info->skb = skb;
4130                 buffer_info->length = adapter->rx_buffer_len;
4131 map_skb:
4132                 buffer_info->dma = pci_map_single(pdev,
4133                                                   skb->data,
4134                                                   adapter->rx_buffer_len,
4135                                                   PCI_DMA_FROMDEVICE);
4136
4137                 /* Fix for errata 23, can't cross 64kB boundary */
4138                 if (!e1000_check_64k_bound(adapter,
4139                                         (void *)(unsigned long)buffer_info->dma,
4140                                         adapter->rx_buffer_len)) {
4141                         DPRINTK(RX_ERR, ERR,
4142                                 "dma align check failed: %u bytes at %p\n",
4143                                 adapter->rx_buffer_len,
4144                                 (void *)(unsigned long)buffer_info->dma);
4145                         dev_kfree_skb(skb);
4146                         buffer_info->skb = NULL;
4147
4148                         pci_unmap_single(pdev, buffer_info->dma,
4149                                          adapter->rx_buffer_len,
4150                                          PCI_DMA_FROMDEVICE);
4151
4152                         break; /* while !buffer_info->skb */
4153                 }
4154                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4155                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4156
4157                 if (unlikely(++i == rx_ring->count))
4158                         i = 0;
4159                 buffer_info = &rx_ring->buffer_info[i];
4160         }
4161
4162         if (likely(rx_ring->next_to_use != i)) {
4163                 rx_ring->next_to_use = i;
4164                 if (unlikely(i-- == 0))
4165                         i = (rx_ring->count - 1);
4166
4167                 /* Force memory writes to complete before letting h/w
4168                  * know there are new descriptors to fetch.  (Only
4169                  * applicable for weak-ordered memory model archs,
4170                  * such as IA-64). */
4171                 wmb();
4172                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4173         }
4174 }
4175
4176 /**
4177  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4178  * @adapter: address of board private structure
4179  **/
4180
4181 static void
4182 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4183                           struct e1000_rx_ring *rx_ring,
4184                           int cleaned_count)
4185 {
4186         struct net_device *netdev = adapter->netdev;
4187         struct pci_dev *pdev = adapter->pdev;
4188         union e1000_rx_desc_packet_split *rx_desc;
4189         struct e1000_buffer *buffer_info;
4190         struct e1000_ps_page *ps_page;
4191         struct e1000_ps_page_dma *ps_page_dma;
4192         struct sk_buff *skb;
4193         unsigned int i, j;
4194
4195         i = rx_ring->next_to_use;
4196         buffer_info = &rx_ring->buffer_info[i];
4197         ps_page = &rx_ring->ps_page[i];
4198         ps_page_dma = &rx_ring->ps_page_dma[i];
4199
4200         while (cleaned_count--) {
4201                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4202
4203                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4204                         if (j < adapter->rx_ps_pages) {
4205                                 if (likely(!ps_page->ps_page[j])) {
4206                                         ps_page->ps_page[j] =
4207                                                 alloc_page(GFP_ATOMIC);
4208                                         if (unlikely(!ps_page->ps_page[j])) {
4209                                                 adapter->alloc_rx_buff_failed++;
4210                                                 goto no_buffers;
4211                                         }
4212                                         ps_page_dma->ps_page_dma[j] =
4213                                                 pci_map_page(pdev,
4214                                                             ps_page->ps_page[j],
4215                                                             0, PAGE_SIZE,
4216                                                             PCI_DMA_FROMDEVICE);
4217                                 }
4218                                 /* Refresh the desc even if buffer_addrs didn't
4219                                  * change because each write-back erases
4220                                  * this info.
4221                                  */
4222                                 rx_desc->read.buffer_addr[j+1] =
4223                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4224                         } else
4225                                 rx_desc->read.buffer_addr[j+1] = ~0;
4226                 }
4227
4228                 skb = netdev_alloc_skb(netdev,
4229                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4230
4231                 if (unlikely(!skb)) {
4232                         adapter->alloc_rx_buff_failed++;
4233                         break;
4234                 }
4235
4236                 /* Make buffer alignment 2 beyond a 16 byte boundary
4237                  * this will result in a 16 byte aligned IP header after
4238                  * the 14 byte MAC header is removed
4239                  */
4240                 skb_reserve(skb, NET_IP_ALIGN);
4241
4242                 buffer_info->skb = skb;
4243                 buffer_info->length = adapter->rx_ps_bsize0;
4244                 buffer_info->dma = pci_map_single(pdev, skb->data,
4245                                                   adapter->rx_ps_bsize0,
4246                                                   PCI_DMA_FROMDEVICE);
4247
4248                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4249
4250                 if (unlikely(++i == rx_ring->count)) i = 0;
4251                 buffer_info = &rx_ring->buffer_info[i];
4252                 ps_page = &rx_ring->ps_page[i];
4253                 ps_page_dma = &rx_ring->ps_page_dma[i];
4254         }
4255
4256 no_buffers:
4257         if (likely(rx_ring->next_to_use != i)) {
4258                 rx_ring->next_to_use = i;
4259                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4260
4261                 /* Force memory writes to complete before letting h/w
4262                  * know there are new descriptors to fetch.  (Only
4263                  * applicable for weak-ordered memory model archs,
4264                  * such as IA-64). */
4265                 wmb();
4266                 /* Hardware increments by 16 bytes, but packet split
4267                  * descriptors are 32 bytes...so we increment tail
4268                  * twice as much.
4269                  */
4270                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4271         }
4272 }
4273
4274 /**
4275  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4276  * @adapter:
4277  **/
4278
4279 static void
4280 e1000_smartspeed(struct e1000_adapter *adapter)
4281 {
4282         uint16_t phy_status;
4283         uint16_t phy_ctrl;
4284
4285         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4286            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4287                 return;
4288
4289         if (adapter->smartspeed == 0) {
4290                 /* If Master/Slave config fault is asserted twice,
4291                  * we assume back-to-back */
4292                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4293                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4294                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4295                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4296                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4297                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4298                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4299                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4300                                             phy_ctrl);
4301                         adapter->smartspeed++;
4302                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4303                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4304                                                &phy_ctrl)) {
4305                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4306                                              MII_CR_RESTART_AUTO_NEG);
4307                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4308                                                     phy_ctrl);
4309                         }
4310                 }
4311                 return;
4312         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4313                 /* If still no link, perhaps using 2/3 pair cable */
4314                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4315                 phy_ctrl |= CR_1000T_MS_ENABLE;
4316                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4317                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4318                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4319                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4320                                      MII_CR_RESTART_AUTO_NEG);
4321                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4322                 }
4323         }
4324         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4325         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4326                 adapter->smartspeed = 0;
4327 }
4328
4329 /**
4330  * e1000_ioctl -
4331  * @netdev:
4332  * @ifreq:
4333  * @cmd:
4334  **/
4335
4336 static int
4337 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4338 {
4339         switch (cmd) {
4340         case SIOCGMIIPHY:
4341         case SIOCGMIIREG:
4342         case SIOCSMIIREG:
4343                 return e1000_mii_ioctl(netdev, ifr, cmd);
4344         default:
4345                 return -EOPNOTSUPP;
4346         }
4347 }
4348
4349 /**
4350  * e1000_mii_ioctl -
4351  * @netdev:
4352  * @ifreq:
4353  * @cmd:
4354  **/
4355
4356 static int
4357 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4358 {
4359         struct e1000_adapter *adapter = netdev_priv(netdev);
4360         struct mii_ioctl_data *data = if_mii(ifr);
4361         int retval;
4362         uint16_t mii_reg;
4363         uint16_t spddplx;
4364         unsigned long flags;
4365
4366         if (adapter->hw.media_type != e1000_media_type_copper)
4367                 return -EOPNOTSUPP;
4368
4369         switch (cmd) {
4370         case SIOCGMIIPHY:
4371                 data->phy_id = adapter->hw.phy_addr;
4372                 break;
4373         case SIOCGMIIREG:
4374                 if (!capable(CAP_NET_ADMIN))
4375                         return -EPERM;
4376                 spin_lock_irqsave(&adapter->stats_lock, flags);
4377                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4378                                    &data->val_out)) {
4379                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4380                         return -EIO;
4381                 }
4382                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4383                 break;
4384         case SIOCSMIIREG:
4385                 if (!capable(CAP_NET_ADMIN))
4386                         return -EPERM;
4387                 if (data->reg_num & ~(0x1F))
4388                         return -EFAULT;
4389                 mii_reg = data->val_in;
4390                 spin_lock_irqsave(&adapter->stats_lock, flags);
4391                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4392                                         mii_reg)) {
4393                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4394                         return -EIO;
4395                 }
4396                 if (adapter->hw.media_type == e1000_media_type_copper) {
4397                         switch (data->reg_num) {
4398                         case PHY_CTRL:
4399                                 if (mii_reg & MII_CR_POWER_DOWN)
4400                                         break;
4401                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4402                                         adapter->hw.autoneg = 1;
4403                                         adapter->hw.autoneg_advertised = 0x2F;
4404                                 } else {
4405                                         if (mii_reg & 0x40)
4406                                                 spddplx = SPEED_1000;
4407                                         else if (mii_reg & 0x2000)
4408                                                 spddplx = SPEED_100;
4409                                         else
4410                                                 spddplx = SPEED_10;
4411                                         spddplx += (mii_reg & 0x100)
4412                                                    ? DUPLEX_FULL :
4413                                                    DUPLEX_HALF;
4414                                         retval = e1000_set_spd_dplx(adapter,
4415                                                                     spddplx);
4416                                         if (retval) {
4417                                                 spin_unlock_irqrestore(
4418                                                         &adapter->stats_lock,
4419                                                         flags);
4420                                                 return retval;
4421                                         }
4422                                 }
4423                                 if (netif_running(adapter->netdev))
4424                                         e1000_reinit_locked(adapter);
4425                                 else
4426                                         e1000_reset(adapter);
4427                                 break;
4428                         case M88E1000_PHY_SPEC_CTRL:
4429                         case M88E1000_EXT_PHY_SPEC_CTRL:
4430                                 if (e1000_phy_reset(&adapter->hw)) {
4431                                         spin_unlock_irqrestore(
4432                                                 &adapter->stats_lock, flags);
4433                                         return -EIO;
4434                                 }
4435                                 break;
4436                         }
4437                 } else {
4438                         switch (data->reg_num) {
4439                         case PHY_CTRL:
4440                                 if (mii_reg & MII_CR_POWER_DOWN)
4441                                         break;
4442                                 if (netif_running(adapter->netdev))
4443                                         e1000_reinit_locked(adapter);
4444                                 else
4445                                         e1000_reset(adapter);
4446                                 break;
4447                         }
4448                 }
4449                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4450                 break;
4451         default:
4452                 return -EOPNOTSUPP;
4453         }
4454         return E1000_SUCCESS;
4455 }
4456
4457 void
4458 e1000_pci_set_mwi(struct e1000_hw *hw)
4459 {
4460         struct e1000_adapter *adapter = hw->back;
4461         int ret_val = pci_set_mwi(adapter->pdev);
4462
4463         if (ret_val)
4464                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4465 }
4466
4467 void
4468 e1000_pci_clear_mwi(struct e1000_hw *hw)
4469 {
4470         struct e1000_adapter *adapter = hw->back;
4471
4472         pci_clear_mwi(adapter->pdev);
4473 }
4474
4475 void
4476 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4477 {
4478         struct e1000_adapter *adapter = hw->back;
4479
4480         pci_read_config_word(adapter->pdev, reg, value);
4481 }
4482
4483 void
4484 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4485 {
4486         struct e1000_adapter *adapter = hw->back;
4487
4488         pci_write_config_word(adapter->pdev, reg, *value);
4489 }
4490
4491 int32_t
4492 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4493 {
4494     struct e1000_adapter *adapter = hw->back;
4495     uint16_t cap_offset;
4496
4497     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4498     if (!cap_offset)
4499         return -E1000_ERR_CONFIG;
4500
4501     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4502
4503     return E1000_SUCCESS;
4504 }
4505
4506
4507 void
4508 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4509 {
4510         outl(value, port);
4511 }
4512
4513 static void
4514 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4515 {
4516         struct e1000_adapter *adapter = netdev_priv(netdev);
4517         uint32_t ctrl, rctl;
4518
4519         e1000_irq_disable(adapter);
4520         adapter->vlgrp = grp;
4521
4522         if (grp) {
4523                 /* enable VLAN tag insert/strip */
4524                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4525                 ctrl |= E1000_CTRL_VME;
4526                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4527
4528                 if (adapter->hw.mac_type != e1000_ich8lan) {
4529                 /* enable VLAN receive filtering */
4530                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4531                 rctl |= E1000_RCTL_VFE;
4532                 rctl &= ~E1000_RCTL_CFIEN;
4533                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4534                 e1000_update_mng_vlan(adapter);
4535                 }
4536         } else {
4537                 /* disable VLAN tag insert/strip */
4538                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4539                 ctrl &= ~E1000_CTRL_VME;
4540                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4541
4542                 if (adapter->hw.mac_type != e1000_ich8lan) {
4543                 /* disable VLAN filtering */
4544                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4545                 rctl &= ~E1000_RCTL_VFE;
4546                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4547                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4548                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4549                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4550                 }
4551                 }
4552         }
4553
4554         e1000_irq_enable(adapter);
4555 }
4556
4557 static void
4558 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4559 {
4560         struct e1000_adapter *adapter = netdev_priv(netdev);
4561         uint32_t vfta, index;
4562
4563         if ((adapter->hw.mng_cookie.status &
4564              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4565             (vid == adapter->mng_vlan_id))
4566                 return;
4567         /* add VID to filter table */
4568         index = (vid >> 5) & 0x7F;
4569         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4570         vfta |= (1 << (vid & 0x1F));
4571         e1000_write_vfta(&adapter->hw, index, vfta);
4572 }
4573
4574 static void
4575 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4576 {
4577         struct e1000_adapter *adapter = netdev_priv(netdev);
4578         uint32_t vfta, index;
4579
4580         e1000_irq_disable(adapter);
4581
4582         if (adapter->vlgrp)
4583                 adapter->vlgrp->vlan_devices[vid] = NULL;
4584
4585         e1000_irq_enable(adapter);
4586
4587         if ((adapter->hw.mng_cookie.status &
4588              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4589             (vid == adapter->mng_vlan_id)) {
4590                 /* release control to f/w */
4591                 e1000_release_hw_control(adapter);
4592                 return;
4593         }
4594
4595         /* remove VID from filter table */
4596         index = (vid >> 5) & 0x7F;
4597         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4598         vfta &= ~(1 << (vid & 0x1F));
4599         e1000_write_vfta(&adapter->hw, index, vfta);
4600 }
4601
4602 static void
4603 e1000_restore_vlan(struct e1000_adapter *adapter)
4604 {
4605         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4606
4607         if (adapter->vlgrp) {
4608                 uint16_t vid;
4609                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4610                         if (!adapter->vlgrp->vlan_devices[vid])
4611                                 continue;
4612                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4613                 }
4614         }
4615 }
4616
4617 int
4618 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4619 {
4620         adapter->hw.autoneg = 0;
4621
4622         /* Fiber NICs only allow 1000 gbps Full duplex */
4623         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4624                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4625                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4626                 return -EINVAL;
4627         }
4628
4629         switch (spddplx) {
4630         case SPEED_10 + DUPLEX_HALF:
4631                 adapter->hw.forced_speed_duplex = e1000_10_half;
4632                 break;
4633         case SPEED_10 + DUPLEX_FULL:
4634                 adapter->hw.forced_speed_duplex = e1000_10_full;
4635                 break;
4636         case SPEED_100 + DUPLEX_HALF:
4637                 adapter->hw.forced_speed_duplex = e1000_100_half;
4638                 break;
4639         case SPEED_100 + DUPLEX_FULL:
4640                 adapter->hw.forced_speed_duplex = e1000_100_full;
4641                 break;
4642         case SPEED_1000 + DUPLEX_FULL:
4643                 adapter->hw.autoneg = 1;
4644                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4645                 break;
4646         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4647         default:
4648                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4649                 return -EINVAL;
4650         }
4651         return 0;
4652 }
4653
4654 #ifdef CONFIG_PM
4655 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4656  * bus we're on (PCI(X) vs. PCI-E)
4657  */
4658 #define PCIE_CONFIG_SPACE_LEN 256
4659 #define PCI_CONFIG_SPACE_LEN 64
4660 static int
4661 e1000_pci_save_state(struct e1000_adapter *adapter)
4662 {
4663         struct pci_dev *dev = adapter->pdev;
4664         int size;
4665         int i;
4666
4667         if (adapter->hw.mac_type >= e1000_82571)
4668                 size = PCIE_CONFIG_SPACE_LEN;
4669         else
4670                 size = PCI_CONFIG_SPACE_LEN;
4671
4672         WARN_ON(adapter->config_space != NULL);
4673
4674         adapter->config_space = kmalloc(size, GFP_KERNEL);
4675         if (!adapter->config_space) {
4676                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4677                 return -ENOMEM;
4678         }
4679         for (i = 0; i < (size / 4); i++)
4680                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4681         return 0;
4682 }
4683
4684 static void
4685 e1000_pci_restore_state(struct e1000_adapter *adapter)
4686 {
4687         struct pci_dev *dev = adapter->pdev;
4688         int size;
4689         int i;
4690
4691         if (adapter->config_space == NULL)
4692                 return;
4693
4694         if (adapter->hw.mac_type >= e1000_82571)
4695                 size = PCIE_CONFIG_SPACE_LEN;
4696         else
4697                 size = PCI_CONFIG_SPACE_LEN;
4698         for (i = 0; i < (size / 4); i++)
4699                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4700         kfree(adapter->config_space);
4701         adapter->config_space = NULL;
4702         return;
4703 }
4704 #endif /* CONFIG_PM */
4705
4706 static int
4707 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4708 {
4709         struct net_device *netdev = pci_get_drvdata(pdev);
4710         struct e1000_adapter *adapter = netdev_priv(netdev);
4711         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4712         uint32_t wufc = adapter->wol;
4713 #ifdef CONFIG_PM
4714         int retval = 0;
4715 #endif
4716
4717         netif_device_detach(netdev);
4718
4719         if (netif_running(netdev)) {
4720                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4721                 e1000_down(adapter);
4722         }
4723
4724 #ifdef CONFIG_PM
4725         /* Implement our own version of pci_save_state(pdev) because pci-
4726          * express adapters have 256-byte config spaces. */
4727         retval = e1000_pci_save_state(adapter);
4728         if (retval)
4729                 return retval;
4730 #endif
4731
4732         status = E1000_READ_REG(&adapter->hw, STATUS);
4733         if (status & E1000_STATUS_LU)
4734                 wufc &= ~E1000_WUFC_LNKC;
4735
4736         if (wufc) {
4737                 e1000_setup_rctl(adapter);
4738                 e1000_set_multi(netdev);
4739
4740                 /* turn on all-multi mode if wake on multicast is enabled */
4741                 if (wufc & E1000_WUFC_MC) {
4742                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4743                         rctl |= E1000_RCTL_MPE;
4744                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4745                 }
4746
4747                 if (adapter->hw.mac_type >= e1000_82540) {
4748                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4749                         /* advertise wake from D3Cold */
4750                         #define E1000_CTRL_ADVD3WUC 0x00100000
4751                         /* phy power management enable */
4752                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4753                         ctrl |= E1000_CTRL_ADVD3WUC |
4754                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4755                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4756                 }
4757
4758                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4759                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4760                         /* keep the laser running in D3 */
4761                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4762                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4763                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4764                 }
4765
4766                 /* Allow time for pending master requests to run */
4767                 e1000_disable_pciex_master(&adapter->hw);
4768
4769                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4770                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4771                 pci_enable_wake(pdev, PCI_D3hot, 1);
4772                 pci_enable_wake(pdev, PCI_D3cold, 1);
4773         } else {
4774                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4775                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4776                 pci_enable_wake(pdev, PCI_D3hot, 0);
4777                 pci_enable_wake(pdev, PCI_D3cold, 0);
4778         }
4779
4780         if (adapter->hw.mac_type >= e1000_82540 &&
4781             adapter->hw.mac_type < e1000_82571 &&
4782             adapter->hw.media_type == e1000_media_type_copper) {
4783                 manc = E1000_READ_REG(&adapter->hw, MANC);
4784                 if (manc & E1000_MANC_SMBUS_EN) {
4785                         manc |= E1000_MANC_ARP_EN;
4786                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4787                         pci_enable_wake(pdev, PCI_D3hot, 1);
4788                         pci_enable_wake(pdev, PCI_D3cold, 1);
4789                 }
4790         }
4791
4792         if (adapter->hw.phy_type == e1000_phy_igp_3)
4793                 e1000_phy_powerdown_workaround(&adapter->hw);
4794
4795         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4796          * would have already happened in close and is redundant. */
4797         e1000_release_hw_control(adapter);
4798
4799         pci_disable_device(pdev);
4800
4801         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4802
4803         return 0;
4804 }
4805
4806 #ifdef CONFIG_PM
4807 static int
4808 e1000_resume(struct pci_dev *pdev)
4809 {
4810         struct net_device *netdev = pci_get_drvdata(pdev);
4811         struct e1000_adapter *adapter = netdev_priv(netdev);
4812         uint32_t manc, err;
4813
4814         pci_set_power_state(pdev, PCI_D0);
4815         e1000_pci_restore_state(adapter);
4816         if ((err = pci_enable_device(pdev))) {
4817                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4818                 return err;
4819         }
4820         pci_set_master(pdev);
4821
4822         pci_enable_wake(pdev, PCI_D3hot, 0);
4823         pci_enable_wake(pdev, PCI_D3cold, 0);
4824
4825         e1000_reset(adapter);
4826         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4827
4828         if (netif_running(netdev))
4829                 e1000_up(adapter);
4830
4831         netif_device_attach(netdev);
4832
4833         if (adapter->hw.mac_type >= e1000_82540 &&
4834             adapter->hw.mac_type < e1000_82571 &&
4835             adapter->hw.media_type == e1000_media_type_copper) {
4836                 manc = E1000_READ_REG(&adapter->hw, MANC);
4837                 manc &= ~(E1000_MANC_ARP_EN);
4838                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4839         }
4840
4841         /* If the controller is 82573 and f/w is AMT, do not set
4842          * DRV_LOAD until the interface is up.  For all other cases,
4843          * let the f/w know that the h/w is now under the control
4844          * of the driver. */
4845         if (adapter->hw.mac_type != e1000_82573 ||
4846             !e1000_check_mng_mode(&adapter->hw))
4847                 e1000_get_hw_control(adapter);
4848
4849         return 0;
4850 }
4851 #endif
4852
4853 static void e1000_shutdown(struct pci_dev *pdev)
4854 {
4855         e1000_suspend(pdev, PMSG_SUSPEND);
4856 }
4857
4858 #ifdef CONFIG_NET_POLL_CONTROLLER
4859 /*
4860  * Polling 'interrupt' - used by things like netconsole to send skbs
4861  * without having to re-enable interrupts. It's not called while
4862  * the interrupt routine is executing.
4863  */
4864 static void
4865 e1000_netpoll(struct net_device *netdev)
4866 {
4867         struct e1000_adapter *adapter = netdev_priv(netdev);
4868
4869         disable_irq(adapter->pdev->irq);
4870         e1000_intr(adapter->pdev->irq, netdev);
4871         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4872 #ifndef CONFIG_E1000_NAPI
4873         adapter->clean_rx(adapter, adapter->rx_ring);
4874 #endif
4875         enable_irq(adapter->pdev->irq);
4876 }
4877 #endif
4878
4879 /**
4880  * e1000_io_error_detected - called when PCI error is detected
4881  * @pdev: Pointer to PCI device
4882  * @state: The current pci conneection state
4883  *
4884  * This function is called after a PCI bus error affecting
4885  * this device has been detected.
4886  */
4887 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4888 {
4889         struct net_device *netdev = pci_get_drvdata(pdev);
4890         struct e1000_adapter *adapter = netdev->priv;
4891
4892         netif_device_detach(netdev);
4893
4894         if (netif_running(netdev))
4895                 e1000_down(adapter);
4896         pci_disable_device(pdev);
4897
4898         /* Request a slot slot reset. */
4899         return PCI_ERS_RESULT_NEED_RESET;
4900 }
4901
4902 /**
4903  * e1000_io_slot_reset - called after the pci bus has been reset.
4904  * @pdev: Pointer to PCI device
4905  *
4906  * Restart the card from scratch, as if from a cold-boot. Implementation
4907  * resembles the first-half of the e1000_resume routine.
4908  */
4909 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4910 {
4911         struct net_device *netdev = pci_get_drvdata(pdev);
4912         struct e1000_adapter *adapter = netdev->priv;
4913
4914         if (pci_enable_device(pdev)) {
4915                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4916                 return PCI_ERS_RESULT_DISCONNECT;
4917         }
4918         pci_set_master(pdev);
4919
4920         pci_enable_wake(pdev, PCI_D3hot, 0);
4921         pci_enable_wake(pdev, PCI_D3cold, 0);
4922
4923         e1000_reset(adapter);
4924         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4925
4926         return PCI_ERS_RESULT_RECOVERED;
4927 }
4928
4929 /**
4930  * e1000_io_resume - called when traffic can start flowing again.
4931  * @pdev: Pointer to PCI device
4932  *
4933  * This callback is called when the error recovery driver tells us that
4934  * its OK to resume normal operation. Implementation resembles the
4935  * second-half of the e1000_resume routine.
4936  */
4937 static void e1000_io_resume(struct pci_dev *pdev)
4938 {
4939         struct net_device *netdev = pci_get_drvdata(pdev);
4940         struct e1000_adapter *adapter = netdev->priv;
4941         uint32_t manc, swsm;
4942
4943         if (netif_running(netdev)) {
4944                 if (e1000_up(adapter)) {
4945                         printk("e1000: can't bring device back up after reset\n");
4946                         return;
4947                 }
4948         }
4949
4950         netif_device_attach(netdev);
4951
4952         if (adapter->hw.mac_type >= e1000_82540 &&
4953             adapter->hw.mac_type < e1000_82571 &&
4954             adapter->hw.media_type == e1000_media_type_copper) {
4955                 manc = E1000_READ_REG(&adapter->hw, MANC);
4956                 manc &= ~(E1000_MANC_ARP_EN);
4957                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4958         }
4959
4960         switch (adapter->hw.mac_type) {
4961         case e1000_82573:
4962                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4963                 E1000_WRITE_REG(&adapter->hw, SWSM,
4964                                 swsm | E1000_SWSM_DRV_LOAD);
4965                 break;
4966         default:
4967                 break;
4968         }
4969
4970         if (netif_running(netdev))
4971                 mod_timer(&adapter->watchdog_timer, jiffies);
4972 }
4973
4974 /* e1000_main.c */