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