drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  26   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27
  28 *******************************************************************************/
  29
  30 #include "e1000.h"
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #ifndef CONFIG_E1000_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION "7.0.38-k4"DRIVERNAPI
  40 char e1000_driver_version[] = DRV_VERSION;
  41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  42
  43 /* e1000_pci_tbl - PCI Device ID Table
  44  *
  45  * Last entry must be all 0s
  46  *
  47  * Macro expands to...
  48  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  49  */
  50 static struct pci_device_id e1000_pci_tbl[] = {
  51         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  52         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  53         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  54         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  55         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  56         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  57         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  58         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  59         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  70         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  71         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  72         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  76         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  77         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  78         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  79         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  84         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  85         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  86         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  87         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  88         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  89         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  90         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  91         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  92         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1096),
  94         INTEL_E1000_ETHERNET_DEVICE(0x1098),
  95         INTEL_E1000_ETHERNET_DEVICE(0x1099),
  96         INTEL_E1000_ETHERNET_DEVICE(0x109A),
  97         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
  98         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
  99         /* required last entry */
 100         {0,}
 101 };
 102
 103 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 104
 105 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 106                                     struct e1000_tx_ring *txdr);
 107 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 108                                     struct e1000_rx_ring *rxdr);
 109 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 110                                     struct e1000_tx_ring *tx_ring);
 111 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 112                                     struct e1000_rx_ring *rx_ring);
 113
 114 /* Local Function Prototypes */
 115
 116 static int e1000_init_module(void);
 117 static void e1000_exit_module(void);
 118 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 119 static void __devexit e1000_remove(struct pci_dev *pdev);
 120 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 121 static int e1000_sw_init(struct e1000_adapter *adapter);
 122 static int e1000_open(struct net_device *netdev);
 123 static int e1000_close(struct net_device *netdev);
 124 static void e1000_configure_tx(struct e1000_adapter *adapter);
 125 static void e1000_configure_rx(struct e1000_adapter *adapter);
 126 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 127 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 128 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 129 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 130                                 struct e1000_tx_ring *tx_ring);
 131 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 132                                 struct e1000_rx_ring *rx_ring);
 133 static void e1000_set_multi(struct net_device *netdev);
 134 static void e1000_update_phy_info(unsigned long data);
 135 static void e1000_watchdog(unsigned long data);
 136 static void e1000_82547_tx_fifo_stall(unsigned long data);
 137 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 138 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 139 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 140 static int e1000_set_mac(struct net_device *netdev, void *p);
 141 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 142 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 143                                     struct e1000_tx_ring *tx_ring);
 144 #ifdef CONFIG_E1000_NAPI
 145 static int e1000_clean(struct net_device *poll_dev, int *budget);
 146 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 147                                     struct e1000_rx_ring *rx_ring,
 148                                     int *work_done, int work_to_do);
 149 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 150                                        struct e1000_rx_ring *rx_ring,
 151                                        int *work_done, int work_to_do);
 152 #else
 153 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 154                                     struct e1000_rx_ring *rx_ring);
 155 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 156                                        struct e1000_rx_ring *rx_ring);
 157 #endif
 158 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 159                                    struct e1000_rx_ring *rx_ring,
 160                                    int cleaned_count);
 161 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 162                                       struct e1000_rx_ring *rx_ring,
 163                                       int cleaned_count);
 164 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 165 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 166                            int cmd);
 167 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 168 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 169 static void e1000_tx_timeout(struct net_device *dev);
 170 static void e1000_reset_task(struct net_device *dev);
 171 static void e1000_smartspeed(struct e1000_adapter *adapter);
 172 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 173                                        struct sk_buff *skb);
 174
 175 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 176 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 177 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 178 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 179
 180 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 181 #ifdef CONFIG_PM
 182 static int e1000_resume(struct pci_dev *pdev);
 183 #endif
 184 static void e1000_shutdown(struct pci_dev *pdev);
 185
 186 #ifdef CONFIG_NET_POLL_CONTROLLER
 187 /* for netdump / net console */
 188 static void e1000_netpoll (struct net_device *netdev);
 189 #endif
 190
 191 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 192                      pci_channel_state_t state);
 193 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 194 static void e1000_io_resume(struct pci_dev *pdev);
 195
 196 static struct pci_error_handlers e1000_err_handler = {
 197         .error_detected = e1000_io_error_detected,
 198         .slot_reset = e1000_io_slot_reset,
 199         .resume = e1000_io_resume,
 200 };
 201
 202 static struct pci_driver e1000_driver = {
 203         .name     = e1000_driver_name,
 204         .id_table = e1000_pci_tbl,
 205         .probe    = e1000_probe,
 206         .remove   = __devexit_p(e1000_remove),
 207         /* Power Managment Hooks */
 208         .suspend  = e1000_suspend,
 209 #ifdef CONFIG_PM
 210         .resume   = e1000_resume,
 211 #endif
 212         .shutdown = e1000_shutdown,
 213         .err_handler = &e1000_err_handler
 214 };
 215
 216 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 217 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 218 MODULE_LICENSE("GPL");
 219 MODULE_VERSION(DRV_VERSION);
 220
 221 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 222 module_param(debug, int, 0);
 223 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 224
 225 /**
 226  * e1000_init_module - Driver Registration Routine
 227  *
 228  * e1000_init_module is the first routine called when the driver is
 229  * loaded. All it does is register with the PCI subsystem.
 230  **/
 231
 232 static int __init
 233 e1000_init_module(void)
 234 {
 235         int ret;
 236         printk(KERN_INFO "%s - version %s\n",
 237                e1000_driver_string, e1000_driver_version);
 238
 239         printk(KERN_INFO "%s\n", e1000_copyright);
 240
 241         ret = pci_module_init(&e1000_driver);
 242
 243         return ret;
 244 }
 245
 246 module_init(e1000_init_module);
 247
 248 /**
 249  * e1000_exit_module - Driver Exit Cleanup Routine
 250  *
 251  * e1000_exit_module is called just before the driver is removed
 252  * from memory.
 253  **/
 254
 255 static void __exit
 256 e1000_exit_module(void)
 257 {
 258         pci_unregister_driver(&e1000_driver);
 259 }
 260
 261 module_exit(e1000_exit_module);
 262
 263 static int e1000_request_irq(struct e1000_adapter *adapter)
 264 {
 265         struct net_device *netdev = adapter->netdev;
 266         int flags, err = 0;
 267
 268         flags = SA_SHIRQ | SA_SAMPLE_RANDOM;
 269 #ifdef CONFIG_PCI_MSI
 270         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 271                 adapter->have_msi = TRUE;
 272                 if ((err = pci_enable_msi(adapter->pdev))) {
 273                         DPRINTK(PROBE, ERR,
 274                          "Unable to allocate MSI interrupt Error: %d\n", err);
 275                         adapter->have_msi = FALSE;
 276                 }
 277         }
 278         if (adapter->have_msi)
 279                 flags &= ~SA_SHIRQ;
 280 #endif
 281         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 282                                netdev->name, netdev)))
 283                 DPRINTK(PROBE, ERR,
 284                         "Unable to allocate interrupt Error: %d\n", err);
 285
 286         return err;
 287 }
 288
 289 static void e1000_free_irq(struct e1000_adapter *adapter)
 290 {
 291         struct net_device *netdev = adapter->netdev;
 292
 293         free_irq(adapter->pdev->irq, netdev);
 294
 295 #ifdef CONFIG_PCI_MSI
 296         if (adapter->have_msi)
 297                 pci_disable_msi(adapter->pdev);
 298 #endif
 299 }
 300
 301 /**
 302  * e1000_irq_disable - Mask off interrupt generation on the NIC
 303  * @adapter: board private structure
 304  **/
 305
 306 static void
 307 e1000_irq_disable(struct e1000_adapter *adapter)
 308 {
 309         atomic_inc(&adapter->irq_sem);
 310         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 311         E1000_WRITE_FLUSH(&adapter->hw);
 312         synchronize_irq(adapter->pdev->irq);
 313 }
 314
 315 /**
 316  * e1000_irq_enable - Enable default interrupt generation settings
 317  * @adapter: board private structure
 318  **/
 319
 320 static void
 321 e1000_irq_enable(struct e1000_adapter *adapter)
 322 {
 323         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 324                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 325                 E1000_WRITE_FLUSH(&adapter->hw);
 326         }
 327 }
 328
 329 static void
 330 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 331 {
 332         struct net_device *netdev = adapter->netdev;
 333         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 334         uint16_t old_vid = adapter->mng_vlan_id;
 335         if (adapter->vlgrp) {
 336                 if (!adapter->vlgrp->vlan_devices[vid]) {
 337                         if (adapter->hw.mng_cookie.status &
 338                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 339                                 e1000_vlan_rx_add_vid(netdev, vid);
 340                                 adapter->mng_vlan_id = vid;
 341                         } else
 342                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 343
 344                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 345                                         (vid != old_vid) &&
 346                                         !adapter->vlgrp->vlan_devices[old_vid])
 347                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 348                 } else
 349                         adapter->mng_vlan_id = vid;
 350         }
 351 }
 352
 353 /**
 354  * e1000_release_hw_control - release control of the h/w to f/w
 355  * @adapter: address of board private structure
 356  *
 357  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 358  * For ASF and Pass Through versions of f/w this means that the
 359  * driver is no longer loaded. For AMT version (only with 82573) i
 360  * of the f/w this means that the netowrk i/f is closed.
 361  *
 362  **/
 363
 364 static void
 365 e1000_release_hw_control(struct e1000_adapter *adapter)
 366 {
 367         uint32_t ctrl_ext;
 368         uint32_t swsm;
 369
 370         /* Let firmware taken over control of h/w */
 371         switch (adapter->hw.mac_type) {
 372         case e1000_82571:
 373         case e1000_82572:
 374         case e1000_80003es2lan:
 375                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 376                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 377                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 378                 break;
 379         case e1000_82573:
 380                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 381                 E1000_WRITE_REG(&adapter->hw, SWSM,
 382                                 swsm & ~E1000_SWSM_DRV_LOAD);
 383         default:
 384                 break;
 385         }
 386 }
 387
 388 /**
 389  * e1000_get_hw_control - get control of the h/w from f/w
 390  * @adapter: address of board private structure
 391  *
 392  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 393  * For ASF and Pass Through versions of f/w this means that
 394  * the driver is loaded. For AMT version (only with 82573)
 395  * of the f/w this means that the netowrk i/f is open.
 396  *
 397  **/
 398
 399 static void
 400 e1000_get_hw_control(struct e1000_adapter *adapter)
 401 {
 402         uint32_t ctrl_ext;
 403         uint32_t swsm;
 404         /* Let firmware know the driver has taken over */
 405         switch (adapter->hw.mac_type) {
 406         case e1000_82571:
 407         case e1000_82572:
 408         case e1000_80003es2lan:
 409                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 410                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 411                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 412                 break;
 413         case e1000_82573:
 414                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 415                 E1000_WRITE_REG(&adapter->hw, SWSM,
 416                                 swsm | E1000_SWSM_DRV_LOAD);
 417                 break;
 418         default:
 419                 break;
 420         }
 421 }
 422
 423 int
 424 e1000_up(struct e1000_adapter *adapter)
 425 {
 426         struct net_device *netdev = adapter->netdev;
 427         int i;
 428
 429         /* hardware has been reset, we need to reload some things */
 430
 431         e1000_set_multi(netdev);
 432
 433         e1000_restore_vlan(adapter);
 434
 435         e1000_configure_tx(adapter);
 436         e1000_setup_rctl(adapter);
 437         e1000_configure_rx(adapter);
 438         /* call E1000_DESC_UNUSED which always leaves
 439          * at least 1 descriptor unused to make sure
 440          * next_to_use != next_to_clean */
 441         for (i = 0; i < adapter->num_rx_queues; i++) {
 442                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 443                 adapter->alloc_rx_buf(adapter, ring,
 444                                       E1000_DESC_UNUSED(ring));
 445         }
 446
 447         adapter->tx_queue_len = netdev->tx_queue_len;
 448
 449         mod_timer(&adapter->watchdog_timer, jiffies);
 450
 451 #ifdef CONFIG_E1000_NAPI
 452         netif_poll_enable(netdev);
 453 #endif
 454         e1000_irq_enable(adapter);
 455
 456         return 0;
 457 }
 458
 459 /**
 460  * e1000_power_up_phy - restore link in case the phy was powered down
 461  * @adapter: address of board private structure
 462  *
 463  * The phy may be powered down to save power and turn off link when the
 464  * driver is unloaded and wake on lan is not enabled (among others)
 465  * *** this routine MUST be followed by a call to e1000_reset ***
 466  *
 467  **/
 468
 469 static void e1000_power_up_phy(struct e1000_adapter *adapter)
 470 {
 471         uint16_t mii_reg = 0;
 472
 473         /* Just clear the power down bit to wake the phy back up */
 474         if (adapter->hw.media_type == e1000_media_type_copper) {
 475                 /* according to the manual, the phy will retain its
 476                  * settings across a power-down/up cycle */
 477                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 478                 mii_reg &= ~MII_CR_POWER_DOWN;
 479                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 480         }
 481 }
 482
 483 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 484 {
 485         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 486                                       e1000_check_mng_mode(&adapter->hw);
 487         /* Power down the PHY so no link is implied when interface is down
 488          * The PHY cannot be powered down if any of the following is TRUE
 489          * (a) WoL is enabled
 490          * (b) AMT is active
 491          * (c) SoL/IDER session is active */
 492         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 493             adapter->hw.media_type == e1000_media_type_copper &&
 494             !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 495             !mng_mode_enabled &&
 496             !e1000_check_phy_reset_block(&adapter->hw)) {
 497                 uint16_t mii_reg = 0;
 498                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 499                 mii_reg |= MII_CR_POWER_DOWN;
 500                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 501                 mdelay(1);
 502         }
 503 }
 504
 505 void
 506 e1000_down(struct e1000_adapter *adapter)
 507 {
 508         struct net_device *netdev = adapter->netdev;
 509
 510         e1000_irq_disable(adapter);
 511
 512         del_timer_sync(&adapter->tx_fifo_stall_timer);
 513         del_timer_sync(&adapter->watchdog_timer);
 514         del_timer_sync(&adapter->phy_info_timer);
 515
 516 #ifdef CONFIG_E1000_NAPI
 517         netif_poll_disable(netdev);
 518 #endif
 519         netdev->tx_queue_len = adapter->tx_queue_len;
 520         adapter->link_speed = 0;
 521         adapter->link_duplex = 0;
 522         netif_carrier_off(netdev);
 523         netif_stop_queue(netdev);
 524
 525         e1000_reset(adapter);
 526         e1000_clean_all_tx_rings(adapter);
 527         e1000_clean_all_rx_rings(adapter);
 528 }
 529
 530 void
 531 e1000_reinit_locked(struct e1000_adapter *adapter)
 532 {
 533         WARN_ON(in_interrupt());
 534         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 535                 msleep(1);
 536         e1000_down(adapter);
 537         e1000_up(adapter);
 538         clear_bit(__E1000_RESETTING, &adapter->flags);
 539 }
 540
 541 void
 542 e1000_reset(struct e1000_adapter *adapter)
 543 {
 544         uint32_t pba, manc;
 545         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 546
 547         /* Repartition Pba for greater than 9k mtu
 548          * To take effect CTRL.RST is required.
 549          */
 550
 551         switch (adapter->hw.mac_type) {
 552         case e1000_82547:
 553         case e1000_82547_rev_2:
 554                 pba = E1000_PBA_30K;
 555                 break;
 556         case e1000_82571:
 557         case e1000_82572:
 558         case e1000_80003es2lan:
 559                 pba = E1000_PBA_38K;
 560                 break;
 561         case e1000_82573:
 562                 pba = E1000_PBA_12K;
 563                 break;
 564         default:
 565                 pba = E1000_PBA_48K;
 566                 break;
 567         }
 568
 569         if ((adapter->hw.mac_type != e1000_82573) &&
 570            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 571                 pba -= 8; /* allocate more FIFO for Tx */
 572
 573
 574         if (adapter->hw.mac_type == e1000_82547) {
 575                 adapter->tx_fifo_head = 0;
 576                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 577                 adapter->tx_fifo_size =
 578                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 579                 atomic_set(&adapter->tx_fifo_stall, 0);
 580         }
 581
 582         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 583
 584         /* flow control settings */
 585         /* Set the FC high water mark to 90% of the FIFO size.
 586          * Required to clear last 3 LSB */
 587         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 588
 589         adapter->hw.fc_high_water = fc_high_water_mark;
 590         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 591         if (adapter->hw.mac_type == e1000_80003es2lan)
 592                 adapter->hw.fc_pause_time = 0xFFFF;
 593         else
 594                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 595         adapter->hw.fc_send_xon = 1;
 596         adapter->hw.fc = adapter->hw.original_fc;
 597
 598         /* Allow time for pending master requests to run */
 599         e1000_reset_hw(&adapter->hw);
 600         if (adapter->hw.mac_type >= e1000_82544)
 601                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 602         if (e1000_init_hw(&adapter->hw))
 603                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 604         e1000_update_mng_vlan(adapter);
 605         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 606         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 607
 608         e1000_reset_adaptive(&adapter->hw);
 609         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 610
 611         if (!adapter->smart_power_down &&
 612             (adapter->hw.mac_type == e1000_82571 ||
 613              adapter->hw.mac_type == e1000_82572)) {
 614                 uint16_t phy_data = 0;
 615                 /* speed up time to link by disabling smart power down, ignore
 616                  * the return value of this function because there is nothing
 617                  * different we would do if it failed */
 618                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 619                                    &phy_data);
 620                 phy_data &= ~IGP02E1000_PM_SPD;
 621                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 622                                     phy_data);
 623         }
 624
 625         if (adapter->en_mng_pt) {
 626                 manc = E1000_READ_REG(&adapter->hw, MANC);
 627                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 628                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 629         }
 630 }
 631
 632 /**
 633  * e1000_probe - Device Initialization Routine
 634  * @pdev: PCI device information struct
 635  * @ent: entry in e1000_pci_tbl
 636  *
 637  * Returns 0 on success, negative on failure
 638  *
 639  * e1000_probe initializes an adapter identified by a pci_dev structure.
 640  * The OS initialization, configuring of the adapter private structure,
 641  * and a hardware reset occur.
 642  **/
 643
 644 static int __devinit
 645 e1000_probe(struct pci_dev *pdev,
 646             const struct pci_device_id *ent)
 647 {
 648         struct net_device *netdev;
 649         struct e1000_adapter *adapter;
 650         unsigned long mmio_start, mmio_len;
 651
 652         static int cards_found = 0;
 653         static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
 654         int i, err, pci_using_dac;
 655         uint16_t eeprom_data;
 656         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 657         if ((err = pci_enable_device(pdev)))
 658                 return err;
 659
 660         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 661                 pci_using_dac = 1;
 662         } else {
 663                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 664                         E1000_ERR("No usable DMA configuration, aborting\n");
 665                         return err;
 666                 }
 667                 pci_using_dac = 0;
 668         }
 669
 670         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 671                 return err;
 672
 673         pci_set_master(pdev);
 674
 675         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 676         if (!netdev) {
 677                 err = -ENOMEM;
 678                 goto err_alloc_etherdev;
 679         }
 680
 681         SET_MODULE_OWNER(netdev);
 682         SET_NETDEV_DEV(netdev, &pdev->dev);
 683
 684         pci_set_drvdata(pdev, netdev);
 685         adapter = netdev_priv(netdev);
 686         adapter->netdev = netdev;
 687         adapter->pdev = pdev;
 688         adapter->hw.back = adapter;
 689         adapter->msg_enable = (1 << debug) - 1;
 690
 691         mmio_start = pci_resource_start(pdev, BAR_0);
 692         mmio_len = pci_resource_len(pdev, BAR_0);
 693
 694         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 695         if (!adapter->hw.hw_addr) {
 696                 err = -EIO;
 697                 goto err_ioremap;
 698         }
 699
 700         for (i = BAR_1; i <= BAR_5; i++) {
 701                 if (pci_resource_len(pdev, i) == 0)
 702                         continue;
 703                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 704                         adapter->hw.io_base = pci_resource_start(pdev, i);
 705                         break;
 706                 }
 707         }
 708
 709         netdev->open = &e1000_open;
 710         netdev->stop = &e1000_close;
 711         netdev->hard_start_xmit = &e1000_xmit_frame;
 712         netdev->get_stats = &e1000_get_stats;
 713         netdev->set_multicast_list = &e1000_set_multi;
 714         netdev->set_mac_address = &e1000_set_mac;
 715         netdev->change_mtu = &e1000_change_mtu;
 716         netdev->do_ioctl = &e1000_ioctl;
 717         e1000_set_ethtool_ops(netdev);
 718         netdev->tx_timeout = &e1000_tx_timeout;
 719         netdev->watchdog_timeo = 5 * HZ;
 720 #ifdef CONFIG_E1000_NAPI
 721         netdev->poll = &e1000_clean;
 722         netdev->weight = 64;
 723 #endif
 724         netdev->vlan_rx_register = e1000_vlan_rx_register;
 725         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 726         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 727 #ifdef CONFIG_NET_POLL_CONTROLLER
 728         netdev->poll_controller = e1000_netpoll;
 729 #endif
 730         strcpy(netdev->name, pci_name(pdev));
 731
 732         netdev->mem_start = mmio_start;
 733         netdev->mem_end = mmio_start + mmio_len;
 734         netdev->base_addr = adapter->hw.io_base;
 735
 736         adapter->bd_number = cards_found;
 737
 738         /* setup the private structure */
 739
 740         if ((err = e1000_sw_init(adapter)))
 741                 goto err_sw_init;
 742
 743         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 744                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 745
 746         /* if ksp3, indicate if it's port a being setup */
 747         if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
 748                         e1000_ksp3_port_a == 0)
 749                 adapter->ksp3_port_a = 1;
 750         e1000_ksp3_port_a++;
 751         /* Reset for multiple KP3 adapters */
 752         if (e1000_ksp3_port_a == 4)
 753                 e1000_ksp3_port_a = 0;
 754
 755         if (adapter->hw.mac_type >= e1000_82543) {
 756                 netdev->features = NETIF_F_SG |
 757                                    NETIF_F_HW_CSUM |
 758                                    NETIF_F_HW_VLAN_TX |
 759                                    NETIF_F_HW_VLAN_RX |
 760                                    NETIF_F_HW_VLAN_FILTER;
 761         }
 762
 763 #ifdef NETIF_F_TSO
 764         if ((adapter->hw.mac_type >= e1000_82544) &&
 765            (adapter->hw.mac_type != e1000_82547))
 766                 netdev->features |= NETIF_F_TSO;
 767
 768 #ifdef NETIF_F_TSO_IPV6
 769         if (adapter->hw.mac_type > e1000_82547_rev_2)
 770                 netdev->features |= NETIF_F_TSO_IPV6;
 771 #endif
 772 #endif
 773         if (pci_using_dac)
 774                 netdev->features |= NETIF_F_HIGHDMA;
 775
 776         /* hard_start_xmit is safe against parallel locking */
 777         netdev->features |= NETIF_F_LLTX;
 778
 779         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 780
 781         /* before reading the EEPROM, reset the controller to
 782          * put the device in a known good starting state */
 783
 784         e1000_reset_hw(&adapter->hw);
 785
 786         /* make sure the EEPROM is good */
 787
 788         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 789                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 790                 err = -EIO;
 791                 goto err_eeprom;
 792         }
 793
 794         /* copy the MAC address out of the EEPROM */
 795
 796         if (e1000_read_mac_addr(&adapter->hw))
 797                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 798         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 799         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 800
 801         if (!is_valid_ether_addr(netdev->perm_addr)) {
 802                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 803                 err = -EIO;
 804                 goto err_eeprom;
 805         }
 806
 807         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 808
 809         e1000_get_bus_info(&adapter->hw);
 810
 811         init_timer(&adapter->tx_fifo_stall_timer);
 812         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 813         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 814
 815         init_timer(&adapter->watchdog_timer);
 816         adapter->watchdog_timer.function = &e1000_watchdog;
 817         adapter->watchdog_timer.data = (unsigned long) adapter;
 818
 819         init_timer(&adapter->phy_info_timer);
 820         adapter->phy_info_timer.function = &e1000_update_phy_info;
 821         adapter->phy_info_timer.data = (unsigned long) adapter;
 822
 823         INIT_WORK(&adapter->reset_task,
 824                 (void (*)(void *))e1000_reset_task, netdev);
 825
 826         /* we're going to reset, so assume we have no link for now */
 827
 828         netif_carrier_off(netdev);
 829         netif_stop_queue(netdev);
 830
 831         e1000_check_options(adapter);
 832
 833         /* Initial Wake on LAN setting
 834          * If APM wake is enabled in the EEPROM,
 835          * enable the ACPI Magic Packet filter
 836          */
 837
 838         switch (adapter->hw.mac_type) {
 839         case e1000_82542_rev2_0:
 840         case e1000_82542_rev2_1:
 841         case e1000_82543:
 842                 break;
 843         case e1000_82544:
 844                 e1000_read_eeprom(&adapter->hw,
 845                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 846                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 847                 break;
 848         case e1000_82546:
 849         case e1000_82546_rev_3:
 850         case e1000_82571:
 851         case e1000_80003es2lan:
 852                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 853                         e1000_read_eeprom(&adapter->hw,
 854                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 855                         break;
 856                 }
 857                 /* Fall Through */
 858         default:
 859                 e1000_read_eeprom(&adapter->hw,
 860                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 861                 break;
 862         }
 863         if (eeprom_data & eeprom_apme_mask)
 864                 adapter->wol |= E1000_WUFC_MAG;
 865
 866         /* print bus type/speed/width info */
 867         {
 868         struct e1000_hw *hw = &adapter->hw;
 869         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 870                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 871                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 872                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 873                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 874                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 875                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 876                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 877                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 878                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 879                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 880                  "32-bit"));
 881         }
 882
 883         for (i = 0; i < 6; i++)
 884                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 885
 886         /* reset the hardware with the new settings */
 887         e1000_reset(adapter);
 888
 889         /* If the controller is 82573 and f/w is AMT, do not set
 890          * DRV_LOAD until the interface is up.  For all other cases,
 891          * let the f/w know that the h/w is now under the control
 892          * of the driver. */
 893         if (adapter->hw.mac_type != e1000_82573 ||
 894             !e1000_check_mng_mode(&adapter->hw))
 895                 e1000_get_hw_control(adapter);
 896
 897         strcpy(netdev->name, "eth%d");
 898         if ((err = register_netdev(netdev)))
 899                 goto err_register;
 900
 901         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 902
 903         cards_found++;
 904         return 0;
 905
 906 err_register:
 907 err_sw_init:
 908 err_eeprom:
 909         iounmap(adapter->hw.hw_addr);
 910 err_ioremap:
 911         free_netdev(netdev);
 912 err_alloc_etherdev:
 913         pci_release_regions(pdev);
 914         return err;
 915 }
 916
 917 /**
 918  * e1000_remove - Device Removal Routine
 919  * @pdev: PCI device information struct
 920  *
 921  * e1000_remove is called by the PCI subsystem to alert the driver
 922  * that it should release a PCI device.  The could be caused by a
 923  * Hot-Plug event, or because the driver is going to be removed from
 924  * memory.
 925  **/
 926
 927 static void __devexit
 928 e1000_remove(struct pci_dev *pdev)
 929 {
 930         struct net_device *netdev = pci_get_drvdata(pdev);
 931         struct e1000_adapter *adapter = netdev_priv(netdev);
 932         uint32_t manc;
 933 #ifdef CONFIG_E1000_NAPI
 934         int i;
 935 #endif
 936
 937         flush_scheduled_work();
 938
 939         if (adapter->hw.mac_type >= e1000_82540 &&
 940            adapter->hw.media_type == e1000_media_type_copper) {
 941                 manc = E1000_READ_REG(&adapter->hw, MANC);
 942                 if (manc & E1000_MANC_SMBUS_EN) {
 943                         manc |= E1000_MANC_ARP_EN;
 944                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 945                 }
 946         }
 947
 948         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 949          * would have already happened in close and is redundant. */
 950         e1000_release_hw_control(adapter);
 951
 952         unregister_netdev(netdev);
 953 #ifdef CONFIG_E1000_NAPI
 954         for (i = 0; i < adapter->num_rx_queues; i++)
 955                 dev_put(&adapter->polling_netdev[i]);
 956 #endif
 957
 958         if (!e1000_check_phy_reset_block(&adapter->hw))
 959                 e1000_phy_hw_reset(&adapter->hw);
 960
 961         kfree(adapter->tx_ring);
 962         kfree(adapter->rx_ring);
 963 #ifdef CONFIG_E1000_NAPI
 964         kfree(adapter->polling_netdev);
 965 #endif
 966
 967         iounmap(adapter->hw.hw_addr);
 968         pci_release_regions(pdev);
 969
 970         free_netdev(netdev);
 971
 972         pci_disable_device(pdev);
 973 }
 974
 975 /**
 976  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 977  * @adapter: board private structure to initialize
 978  *
 979  * e1000_sw_init initializes the Adapter private data structure.
 980  * Fields are initialized based on PCI device information and
 981  * OS network device settings (MTU size).
 982  **/
 983
 984 static int __devinit
 985 e1000_sw_init(struct e1000_adapter *adapter)
 986 {
 987         struct e1000_hw *hw = &adapter->hw;
 988         struct net_device *netdev = adapter->netdev;
 989         struct pci_dev *pdev = adapter->pdev;
 990 #ifdef CONFIG_E1000_NAPI
 991         int i;
 992 #endif
 993
 994         /* PCI config space info */
 995
 996         hw->vendor_id = pdev->vendor;
 997         hw->device_id = pdev->device;
 998         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 999         hw->subsystem_id = pdev->subsystem_device;
1000
1001         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1002
1003         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1004
1005         adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
1006         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1007         hw->max_frame_size = netdev->mtu +
1008                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1009         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1010
1011         /* identify the MAC */
1012
1013         if (e1000_set_mac_type(hw)) {
1014                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1015                 return -EIO;
1016         }
1017
1018         /* initialize eeprom parameters */
1019
1020         if (e1000_init_eeprom_params(hw)) {
1021                 E1000_ERR("EEPROM initialization failed\n");
1022                 return -EIO;
1023         }
1024
1025         switch (hw->mac_type) {
1026         default:
1027                 break;
1028         case e1000_82541:
1029         case e1000_82547:
1030         case e1000_82541_rev_2:
1031         case e1000_82547_rev_2:
1032                 hw->phy_init_script = 1;
1033                 break;
1034         }
1035
1036         e1000_set_media_type(hw);
1037
1038         hw->wait_autoneg_complete = FALSE;
1039         hw->tbi_compatibility_en = TRUE;
1040         hw->adaptive_ifs = TRUE;
1041
1042         /* Copper options */
1043
1044         if (hw->media_type == e1000_media_type_copper) {
1045                 hw->mdix = AUTO_ALL_MODES;
1046                 hw->disable_polarity_correction = FALSE;
1047                 hw->master_slave = E1000_MASTER_SLAVE;
1048         }
1049
1050         adapter->num_tx_queues = 1;
1051         adapter->num_rx_queues = 1;
1052
1053         if (e1000_alloc_queues(adapter)) {
1054                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1055                 return -ENOMEM;
1056         }
1057
1058 #ifdef CONFIG_E1000_NAPI
1059         for (i = 0; i < adapter->num_rx_queues; i++) {
1060                 adapter->polling_netdev[i].priv = adapter;
1061                 adapter->polling_netdev[i].poll = &e1000_clean;
1062                 adapter->polling_netdev[i].weight = 64;
1063                 dev_hold(&adapter->polling_netdev[i]);
1064                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1065         }
1066         spin_lock_init(&adapter->tx_queue_lock);
1067 #endif
1068
1069         atomic_set(&adapter->irq_sem, 1);
1070         spin_lock_init(&adapter->stats_lock);
1071
1072         return 0;
1073 }
1074
1075 /**
1076  * e1000_alloc_queues - Allocate memory for all rings
1077  * @adapter: board private structure to initialize
1078  *
1079  * We allocate one ring per queue at run-time since we don't know the
1080  * number of queues at compile-time.  The polling_netdev array is
1081  * intended for Multiqueue, but should work fine with a single queue.
1082  **/
1083
1084 static int __devinit
1085 e1000_alloc_queues(struct e1000_adapter *adapter)
1086 {
1087         int size;
1088
1089         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1090         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1091         if (!adapter->tx_ring)
1092                 return -ENOMEM;
1093         memset(adapter->tx_ring, 0, size);
1094
1095         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1096         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1097         if (!adapter->rx_ring) {
1098                 kfree(adapter->tx_ring);
1099                 return -ENOMEM;
1100         }
1101         memset(adapter->rx_ring, 0, size);
1102
1103 #ifdef CONFIG_E1000_NAPI
1104         size = sizeof(struct net_device) * adapter->num_rx_queues;
1105         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1106         if (!adapter->polling_netdev) {
1107                 kfree(adapter->tx_ring);
1108                 kfree(adapter->rx_ring);
1109                 return -ENOMEM;
1110         }
1111         memset(adapter->polling_netdev, 0, size);
1112 #endif
1113
1114         return E1000_SUCCESS;
1115 }
1116
1117 /**
1118  * e1000_open - Called when a network interface is made active
1119  * @netdev: network interface device structure
1120  *
1121  * Returns 0 on success, negative value on failure
1122  *
1123  * The open entry point is called when a network interface is made
1124  * active by the system (IFF_UP).  At this point all resources needed
1125  * for transmit and receive operations are allocated, the interrupt
1126  * handler is registered with the OS, the watchdog timer is started,
1127  * and the stack is notified that the interface is ready.
1128  **/
1129
1130 static int
1131 e1000_open(struct net_device *netdev)
1132 {
1133         struct e1000_adapter *adapter = netdev_priv(netdev);
1134         int err;
1135
1136         /* disallow open during test */
1137         if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1138                 return -EBUSY;
1139
1140         /* allocate transmit descriptors */
1141
1142         if ((err = e1000_setup_all_tx_resources(adapter)))
1143                 goto err_setup_tx;
1144
1145         /* allocate receive descriptors */
1146
1147         if ((err = e1000_setup_all_rx_resources(adapter)))
1148                 goto err_setup_rx;
1149
1150         err = e1000_request_irq(adapter);
1151         if (err)
1152                 goto err_up;
1153
1154         e1000_power_up_phy(adapter);
1155
1156         if ((err = e1000_up(adapter)))
1157                 goto err_up;
1158         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1159         if ((adapter->hw.mng_cookie.status &
1160                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1161                 e1000_update_mng_vlan(adapter);
1162         }
1163
1164         /* If AMT is enabled, let the firmware know that the network
1165          * interface is now open */
1166         if (adapter->hw.mac_type == e1000_82573 &&
1167             e1000_check_mng_mode(&adapter->hw))
1168                 e1000_get_hw_control(adapter);
1169
1170         return E1000_SUCCESS;
1171
1172 err_up:
1173         e1000_free_all_rx_resources(adapter);
1174 err_setup_rx:
1175         e1000_free_all_tx_resources(adapter);
1176 err_setup_tx:
1177         e1000_reset(adapter);
1178
1179         return err;
1180 }
1181
1182 /**
1183  * e1000_close - Disables a network interface
1184  * @netdev: network interface device structure
1185  *
1186  * Returns 0, this is not allowed to fail
1187  *
1188  * The close entry point is called when an interface is de-activated
1189  * by the OS.  The hardware is still under the drivers control, but
1190  * needs to be disabled.  A global MAC reset is issued to stop the
1191  * hardware, and all transmit and receive resources are freed.
1192  **/
1193
1194 static int
1195 e1000_close(struct net_device *netdev)
1196 {
1197         struct e1000_adapter *adapter = netdev_priv(netdev);
1198
1199         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1200         e1000_down(adapter);
1201         e1000_power_down_phy(adapter);
1202         e1000_free_irq(adapter);
1203
1204         e1000_free_all_tx_resources(adapter);
1205         e1000_free_all_rx_resources(adapter);
1206
1207         if ((adapter->hw.mng_cookie.status &
1208                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1209                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1210         }
1211
1212         /* If AMT is enabled, let the firmware know that the network
1213          * interface is now closed */
1214         if (adapter->hw.mac_type == e1000_82573 &&
1215             e1000_check_mng_mode(&adapter->hw))
1216                 e1000_release_hw_control(adapter);
1217
1218         return 0;
1219 }
1220
1221 /**
1222  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1223  * @adapter: address of board private structure
1224  * @start: address of beginning of memory
1225  * @len: length of memory
1226  **/
1227 static boolean_t
1228 e1000_check_64k_bound(struct e1000_adapter *adapter,
1229                       void *start, unsigned long len)
1230 {
1231         unsigned long begin = (unsigned long) start;
1232         unsigned long end = begin + len;
1233
1234         /* First rev 82545 and 82546 need to not allow any memory
1235          * write location to cross 64k boundary due to errata 23 */
1236         if (adapter->hw.mac_type == e1000_82545 ||
1237             adapter->hw.mac_type == e1000_82546) {
1238                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1239         }
1240
1241         return TRUE;
1242 }
1243
1244 /**
1245  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1246  * @adapter: board private structure
1247  * @txdr:    tx descriptor ring (for a specific queue) to setup
1248  *
1249  * Return 0 on success, negative on failure
1250  **/
1251
1252 static int
1253 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1254                          struct e1000_tx_ring *txdr)
1255 {
1256         struct pci_dev *pdev = adapter->pdev;
1257         int size;
1258
1259         size = sizeof(struct e1000_buffer) * txdr->count;
1260
1261         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1262         if (!txdr->buffer_info) {
1263                 DPRINTK(PROBE, ERR,
1264                 "Unable to allocate memory for the transmit descriptor ring\n");
1265                 return -ENOMEM;
1266         }
1267         memset(txdr->buffer_info, 0, size);
1268
1269         /* round up to nearest 4K */
1270
1271         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1272         E1000_ROUNDUP(txdr->size, 4096);
1273
1274         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1275         if (!txdr->desc) {
1276 setup_tx_desc_die:
1277                 vfree(txdr->buffer_info);
1278                 DPRINTK(PROBE, ERR,
1279                 "Unable to allocate memory for the transmit descriptor ring\n");
1280                 return -ENOMEM;
1281         }
1282
1283         /* Fix for errata 23, can't cross 64kB boundary */
1284         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1285                 void *olddesc = txdr->desc;
1286                 dma_addr_t olddma = txdr->dma;
1287                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1288                                      "at %p\n", txdr->size, txdr->desc);
1289                 /* Try again, without freeing the previous */
1290                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1291                 /* Failed allocation, critical failure */
1292                 if (!txdr->desc) {
1293                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1294                         goto setup_tx_desc_die;
1295                 }
1296
1297                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1298                         /* give up */
1299                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1300                                             txdr->dma);
1301                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1302                         DPRINTK(PROBE, ERR,
1303                                 "Unable to allocate aligned memory "
1304                                 "for the transmit descriptor ring\n");
1305                         vfree(txdr->buffer_info);
1306                         return -ENOMEM;
1307                 } else {
1308                         /* Free old allocation, new allocation was successful */
1309                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1310                 }
1311         }
1312         memset(txdr->desc, 0, txdr->size);
1313
1314         txdr->next_to_use = 0;
1315         txdr->next_to_clean = 0;
1316         spin_lock_init(&txdr->tx_lock);
1317
1318         return 0;
1319 }
1320
1321 /**
1322  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1323  *                                (Descriptors) for all queues
1324  * @adapter: board private structure
1325  *
1326  * If this function returns with an error, then it's possible one or
1327  * more of the rings is populated (while the rest are not).  It is the
1328  * callers duty to clean those orphaned rings.
1329  *
1330  * Return 0 on success, negative on failure
1331  **/
1332
1333 int
1334 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1335 {
1336         int i, err = 0;
1337
1338         for (i = 0; i < adapter->num_tx_queues; i++) {
1339                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1340                 if (err) {
1341                         DPRINTK(PROBE, ERR,
1342                                 "Allocation for Tx Queue %u failed\n", i);
1343                         break;
1344                 }
1345         }
1346
1347         return err;
1348 }
1349
1350 /**
1351  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1352  * @adapter: board private structure
1353  *
1354  * Configure the Tx unit of the MAC after a reset.
1355  **/
1356
1357 static void
1358 e1000_configure_tx(struct e1000_adapter *adapter)
1359 {
1360         uint64_t tdba;
1361         struct e1000_hw *hw = &adapter->hw;
1362         uint32_t tdlen, tctl, tipg, tarc;
1363         uint32_t ipgr1, ipgr2;
1364
1365         /* Setup the HW Tx Head and Tail descriptor pointers */
1366
1367         switch (adapter->num_tx_queues) {
1368         case 1:
1369         default:
1370                 tdba = adapter->tx_ring[0].dma;
1371                 tdlen = adapter->tx_ring[0].count *
1372                         sizeof(struct e1000_tx_desc);
1373                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1374                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1375                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1376                 E1000_WRITE_REG(hw, TDT, 0);
1377                 E1000_WRITE_REG(hw, TDH, 0);
1378                 adapter->tx_ring[0].tdh = E1000_TDH;
1379                 adapter->tx_ring[0].tdt = E1000_TDT;
1380                 break;
1381         }
1382
1383         /* Set the default values for the Tx Inter Packet Gap timer */
1384
1385         if (hw->media_type == e1000_media_type_fiber ||
1386             hw->media_type == e1000_media_type_internal_serdes)
1387                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1388         else
1389                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1390
1391         switch (hw->mac_type) {
1392         case e1000_82542_rev2_0:
1393         case e1000_82542_rev2_1:
1394                 tipg = DEFAULT_82542_TIPG_IPGT;
1395                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1396                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1397                 break;
1398         case e1000_80003es2lan:
1399                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1400                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1401                 break;
1402         default:
1403                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1404                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1405                 break;
1406         }
1407         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1408         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1409         E1000_WRITE_REG(hw, TIPG, tipg);
1410
1411         /* Set the Tx Interrupt Delay register */
1412
1413         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1414         if (hw->mac_type >= e1000_82540)
1415                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1416
1417         /* Program the Transmit Control Register */
1418
1419         tctl = E1000_READ_REG(hw, TCTL);
1420
1421         tctl &= ~E1000_TCTL_CT;
1422         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1423                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1424
1425 #ifdef DISABLE_MULR
1426         /* disable Multiple Reads for debugging */
1427         tctl &= ~E1000_TCTL_MULR;
1428 #endif
1429
1430         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1431                 tarc = E1000_READ_REG(hw, TARC0);
1432                 tarc |= ((1 << 25) | (1 << 21));
1433                 E1000_WRITE_REG(hw, TARC0, tarc);
1434                 tarc = E1000_READ_REG(hw, TARC1);
1435                 tarc |= (1 << 25);
1436                 if (tctl & E1000_TCTL_MULR)
1437                         tarc &= ~(1 << 28);
1438                 else
1439                         tarc |= (1 << 28);
1440                 E1000_WRITE_REG(hw, TARC1, tarc);
1441         } else if (hw->mac_type == e1000_80003es2lan) {
1442                 tarc = E1000_READ_REG(hw, TARC0);
1443                 tarc |= 1;
1444                 if (hw->media_type == e1000_media_type_internal_serdes)
1445                         tarc |= (1 << 20);
1446                 E1000_WRITE_REG(hw, TARC0, tarc);
1447                 tarc = E1000_READ_REG(hw, TARC1);
1448                 tarc |= 1;
1449                 E1000_WRITE_REG(hw, TARC1, tarc);
1450         }
1451
1452         e1000_config_collision_dist(hw);
1453
1454         /* Setup Transmit Descriptor Settings for eop descriptor */
1455         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1456                 E1000_TXD_CMD_IFCS;
1457
1458         if (hw->mac_type < e1000_82543)
1459                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1460         else
1461                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1462
1463         /* Cache if we're 82544 running in PCI-X because we'll
1464          * need this to apply a workaround later in the send path. */
1465         if (hw->mac_type == e1000_82544 &&
1466             hw->bus_type == e1000_bus_type_pcix)
1467                 adapter->pcix_82544 = 1;
1468
1469         E1000_WRITE_REG(hw, TCTL, tctl);
1470
1471 }
1472
1473 /**
1474  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1475  * @adapter: board private structure
1476  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1477  *
1478  * Returns 0 on success, negative on failure
1479  **/
1480
1481 static int
1482 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1483                          struct e1000_rx_ring *rxdr)
1484 {
1485         struct pci_dev *pdev = adapter->pdev;
1486         int size, desc_len;
1487
1488         size = sizeof(struct e1000_buffer) * rxdr->count;
1489         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1490         if (!rxdr->buffer_info) {
1491                 DPRINTK(PROBE, ERR,
1492                 "Unable to allocate memory for the receive descriptor ring\n");
1493                 return -ENOMEM;
1494         }
1495         memset(rxdr->buffer_info, 0, size);
1496
1497         size = sizeof(struct e1000_ps_page) * rxdr->count;
1498         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1499         if (!rxdr->ps_page) {
1500                 vfree(rxdr->buffer_info);
1501                 DPRINTK(PROBE, ERR,
1502                 "Unable to allocate memory for the receive descriptor ring\n");
1503                 return -ENOMEM;
1504         }
1505         memset(rxdr->ps_page, 0, size);
1506
1507         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1508         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1509         if (!rxdr->ps_page_dma) {
1510                 vfree(rxdr->buffer_info);
1511                 kfree(rxdr->ps_page);
1512                 DPRINTK(PROBE, ERR,
1513                 "Unable to allocate memory for the receive descriptor ring\n");
1514                 return -ENOMEM;
1515         }
1516         memset(rxdr->ps_page_dma, 0, size);
1517
1518         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1519                 desc_len = sizeof(struct e1000_rx_desc);
1520         else
1521                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1522
1523         /* Round up to nearest 4K */
1524
1525         rxdr->size = rxdr->count * desc_len;
1526         E1000_ROUNDUP(rxdr->size, 4096);
1527
1528         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1529
1530         if (!rxdr->desc) {
1531                 DPRINTK(PROBE, ERR,
1532                 "Unable to allocate memory for the receive descriptor ring\n");
1533 setup_rx_desc_die:
1534                 vfree(rxdr->buffer_info);
1535                 kfree(rxdr->ps_page);
1536                 kfree(rxdr->ps_page_dma);
1537                 return -ENOMEM;
1538         }
1539
1540         /* Fix for errata 23, can't cross 64kB boundary */
1541         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1542                 void *olddesc = rxdr->desc;
1543                 dma_addr_t olddma = rxdr->dma;
1544                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1545                                      "at %p\n", rxdr->size, rxdr->desc);
1546                 /* Try again, without freeing the previous */
1547                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1548                 /* Failed allocation, critical failure */
1549                 if (!rxdr->desc) {
1550                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1551                         DPRINTK(PROBE, ERR,
1552                                 "Unable to allocate memory "
1553                                 "for the receive descriptor ring\n");
1554                         goto setup_rx_desc_die;
1555                 }
1556
1557                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1558                         /* give up */
1559                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1560                                             rxdr->dma);
1561                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1562                         DPRINTK(PROBE, ERR,
1563                                 "Unable to allocate aligned memory "
1564                                 "for the receive descriptor ring\n");
1565                         goto setup_rx_desc_die;
1566                 } else {
1567                         /* Free old allocation, new allocation was successful */
1568                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1569                 }
1570         }
1571         memset(rxdr->desc, 0, rxdr->size);
1572
1573         rxdr->next_to_clean = 0;
1574         rxdr->next_to_use = 0;
1575
1576         return 0;
1577 }
1578
1579 /**
1580  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1581  *                                (Descriptors) for all queues
1582  * @adapter: board private structure
1583  *
1584  * If this function returns with an error, then it's possible one or
1585  * more of the rings is populated (while the rest are not).  It is the
1586  * callers duty to clean those orphaned rings.
1587  *
1588  * Return 0 on success, negative on failure
1589  **/
1590
1591 int
1592 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1593 {
1594         int i, err = 0;
1595
1596         for (i = 0; i < adapter->num_rx_queues; i++) {
1597                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1598                 if (err) {
1599                         DPRINTK(PROBE, ERR,
1600                                 "Allocation for Rx Queue %u failed\n", i);
1601                         break;
1602                 }
1603         }
1604
1605         return err;
1606 }
1607
1608 /**
1609  * e1000_setup_rctl - configure the receive control registers
1610  * @adapter: Board private structure
1611  **/
1612 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1613                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1614 static void
1615 e1000_setup_rctl(struct e1000_adapter *adapter)
1616 {
1617         uint32_t rctl, rfctl;
1618         uint32_t psrctl = 0;
1619 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1620         uint32_t pages = 0;
1621 #endif
1622
1623         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1624
1625         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1626
1627         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1628                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1629                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1630
1631         if (adapter->hw.tbi_compatibility_on == 1)
1632                 rctl |= E1000_RCTL_SBP;
1633         else
1634                 rctl &= ~E1000_RCTL_SBP;
1635
1636         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1637                 rctl &= ~E1000_RCTL_LPE;
1638         else
1639                 rctl |= E1000_RCTL_LPE;
1640
1641         /* Setup buffer sizes */
1642         rctl &= ~E1000_RCTL_SZ_4096;
1643         rctl |= E1000_RCTL_BSEX;
1644         switch (adapter->rx_buffer_len) {
1645                 case E1000_RXBUFFER_256:
1646                         rctl |= E1000_RCTL_SZ_256;
1647                         rctl &= ~E1000_RCTL_BSEX;
1648                         break;
1649                 case E1000_RXBUFFER_512:
1650                         rctl |= E1000_RCTL_SZ_512;
1651                         rctl &= ~E1000_RCTL_BSEX;
1652                         break;
1653                 case E1000_RXBUFFER_1024:
1654                         rctl |= E1000_RCTL_SZ_1024;
1655                         rctl &= ~E1000_RCTL_BSEX;
1656                         break;
1657                 case E1000_RXBUFFER_2048:
1658                 default:
1659                         rctl |= E1000_RCTL_SZ_2048;
1660                         rctl &= ~E1000_RCTL_BSEX;
1661                         break;
1662                 case E1000_RXBUFFER_4096:
1663                         rctl |= E1000_RCTL_SZ_4096;
1664                         break;
1665                 case E1000_RXBUFFER_8192:
1666                         rctl |= E1000_RCTL_SZ_8192;
1667                         break;
1668                 case E1000_RXBUFFER_16384:
1669                         rctl |= E1000_RCTL_SZ_16384;
1670                         break;
1671         }
1672
1673 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1674         /* 82571 and greater support packet-split where the protocol
1675          * header is placed in skb->data and the packet data is
1676          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1677          * In the case of a non-split, skb->data is linearly filled,
1678          * followed by the page buffers.  Therefore, skb->data is
1679          * sized to hold the largest protocol header.
1680          */
1681         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1682         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1683             PAGE_SIZE <= 16384)
1684                 adapter->rx_ps_pages = pages;
1685         else
1686                 adapter->rx_ps_pages = 0;
1687 #endif
1688         if (adapter->rx_ps_pages) {
1689                 /* Configure extra packet-split registers */
1690                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1691                 rfctl |= E1000_RFCTL_EXTEN;
1692                 /* disable IPv6 packet split support */
1693                 rfctl |= E1000_RFCTL_IPV6_DIS;
1694                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1695
1696                 rctl |= E1000_RCTL_DTYP_PS;
1697
1698                 psrctl |= adapter->rx_ps_bsize0 >>
1699                         E1000_PSRCTL_BSIZE0_SHIFT;
1700
1701                 switch (adapter->rx_ps_pages) {
1702                 case 3:
1703                         psrctl |= PAGE_SIZE <<
1704                                 E1000_PSRCTL_BSIZE3_SHIFT;
1705                 case 2:
1706                         psrctl |= PAGE_SIZE <<
1707                                 E1000_PSRCTL_BSIZE2_SHIFT;
1708                 case 1:
1709                         psrctl |= PAGE_SIZE >>
1710                                 E1000_PSRCTL_BSIZE1_SHIFT;
1711                         break;
1712                 }
1713
1714                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1715         }
1716
1717         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1718 }
1719
1720 /**
1721  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1722  * @adapter: board private structure
1723  *
1724  * Configure the Rx unit of the MAC after a reset.
1725  **/
1726
1727 static void
1728 e1000_configure_rx(struct e1000_adapter *adapter)
1729 {
1730         uint64_t rdba;
1731         struct e1000_hw *hw = &adapter->hw;
1732         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1733
1734         if (adapter->rx_ps_pages) {
1735                 /* this is a 32 byte descriptor */
1736                 rdlen = adapter->rx_ring[0].count *
1737                         sizeof(union e1000_rx_desc_packet_split);
1738                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1739                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1740         } else {
1741                 rdlen = adapter->rx_ring[0].count *
1742                         sizeof(struct e1000_rx_desc);
1743                 adapter->clean_rx = e1000_clean_rx_irq;
1744                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1745         }
1746
1747         /* disable receives while setting up the descriptors */
1748         rctl = E1000_READ_REG(hw, RCTL);
1749         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1750
1751         /* set the Receive Delay Timer Register */
1752         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1753
1754         if (hw->mac_type >= e1000_82540) {
1755                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1756                 if (adapter->itr > 1)
1757                         E1000_WRITE_REG(hw, ITR,
1758                                 1000000000 / (adapter->itr * 256));
1759         }
1760
1761         if (hw->mac_type >= e1000_82571) {
1762                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1763                 /* Reset delay timers after every interrupt */
1764                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1765 #ifdef CONFIG_E1000_NAPI
1766                 /* Auto-Mask interrupts upon ICR read. */
1767                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1768 #endif
1769                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1770                 E1000_WRITE_REG(hw, IAM, ~0);
1771                 E1000_WRITE_FLUSH(hw);
1772         }
1773
1774         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1775          * the Base and Length of the Rx Descriptor Ring */
1776         switch (adapter->num_rx_queues) {
1777         case 1:
1778         default:
1779                 rdba = adapter->rx_ring[0].dma;
1780                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1781                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1782                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1783                 E1000_WRITE_REG(hw, RDT, 0);
1784                 E1000_WRITE_REG(hw, RDH, 0);
1785                 adapter->rx_ring[0].rdh = E1000_RDH;
1786                 adapter->rx_ring[0].rdt = E1000_RDT;
1787                 break;
1788         }
1789
1790         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1791         if (hw->mac_type >= e1000_82543) {
1792                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1793                 if (adapter->rx_csum == TRUE) {
1794                         rxcsum |= E1000_RXCSUM_TUOFL;
1795
1796                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1797                          * Must be used in conjunction with packet-split. */
1798                         if ((hw->mac_type >= e1000_82571) &&
1799                             (adapter->rx_ps_pages)) {
1800                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1801                         }
1802                 } else {
1803                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1804                         /* don't need to clear IPPCSE as it defaults to 0 */
1805                 }
1806                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1807         }
1808
1809         /* Enable Receives */
1810         E1000_WRITE_REG(hw, RCTL, rctl);
1811 }
1812
1813 /**
1814  * e1000_free_tx_resources - Free Tx Resources per Queue
1815  * @adapter: board private structure
1816  * @tx_ring: Tx descriptor ring for a specific queue
1817  *
1818  * Free all transmit software resources
1819  **/
1820
1821 static void
1822 e1000_free_tx_resources(struct e1000_adapter *adapter,
1823                         struct e1000_tx_ring *tx_ring)
1824 {
1825         struct pci_dev *pdev = adapter->pdev;
1826
1827         e1000_clean_tx_ring(adapter, tx_ring);
1828
1829         vfree(tx_ring->buffer_info);
1830         tx_ring->buffer_info = NULL;
1831
1832         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1833
1834         tx_ring->desc = NULL;
1835 }
1836
1837 /**
1838  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1839  * @adapter: board private structure
1840  *
1841  * Free all transmit software resources
1842  **/
1843
1844 void
1845 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1846 {
1847         int i;
1848
1849         for (i = 0; i < adapter->num_tx_queues; i++)
1850                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1851 }
1852
1853 static void
1854 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1855                         struct e1000_buffer *buffer_info)
1856 {
1857         if (buffer_info->dma) {
1858                 pci_unmap_page(adapter->pdev,
1859                                 buffer_info->dma,
1860                                 buffer_info->length,
1861                                 PCI_DMA_TODEVICE);
1862         }
1863         if (buffer_info->skb)
1864                 dev_kfree_skb_any(buffer_info->skb);
1865         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1866 }
1867
1868 /**
1869  * e1000_clean_tx_ring - Free Tx Buffers
1870  * @adapter: board private structure
1871  * @tx_ring: ring to be cleaned
1872  **/
1873
1874 static void
1875 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1876                     struct e1000_tx_ring *tx_ring)
1877 {
1878         struct e1000_buffer *buffer_info;
1879         unsigned long size;
1880         unsigned int i;
1881
1882         /* Free all the Tx ring sk_buffs */
1883
1884         for (i = 0; i < tx_ring->count; i++) {
1885                 buffer_info = &tx_ring->buffer_info[i];
1886                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1887         }
1888
1889         size = sizeof(struct e1000_buffer) * tx_ring->count;
1890         memset(tx_ring->buffer_info, 0, size);
1891
1892         /* Zero out the descriptor ring */
1893
1894         memset(tx_ring->desc, 0, tx_ring->size);
1895
1896         tx_ring->next_to_use = 0;
1897         tx_ring->next_to_clean = 0;
1898         tx_ring->last_tx_tso = 0;
1899
1900         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1901         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1902 }
1903
1904 /**
1905  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1906  * @adapter: board private structure
1907  **/
1908
1909 static void
1910 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1911 {
1912         int i;
1913
1914         for (i = 0; i < adapter->num_tx_queues; i++)
1915                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1916 }
1917
1918 /**
1919  * e1000_free_rx_resources - Free Rx Resources
1920  * @adapter: board private structure
1921  * @rx_ring: ring to clean the resources from
1922  *
1923  * Free all receive software resources
1924  **/
1925
1926 static void
1927 e1000_free_rx_resources(struct e1000_adapter *adapter,
1928                         struct e1000_rx_ring *rx_ring)
1929 {
1930         struct pci_dev *pdev = adapter->pdev;
1931
1932         e1000_clean_rx_ring(adapter, rx_ring);
1933
1934         vfree(rx_ring->buffer_info);
1935         rx_ring->buffer_info = NULL;
1936         kfree(rx_ring->ps_page);
1937         rx_ring->ps_page = NULL;
1938         kfree(rx_ring->ps_page_dma);
1939         rx_ring->ps_page_dma = NULL;
1940
1941         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1942
1943         rx_ring->desc = NULL;
1944 }
1945
1946 /**
1947  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1948  * @adapter: board private structure
1949  *
1950  * Free all receive software resources
1951  **/
1952
1953 void
1954 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1955 {
1956         int i;
1957
1958         for (i = 0; i < adapter->num_rx_queues; i++)
1959                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1960 }
1961
1962 /**
1963  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1964  * @adapter: board private structure
1965  * @rx_ring: ring to free buffers from
1966  **/
1967
1968 static void
1969 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1970                     struct e1000_rx_ring *rx_ring)
1971 {
1972         struct e1000_buffer *buffer_info;
1973         struct e1000_ps_page *ps_page;
1974         struct e1000_ps_page_dma *ps_page_dma;
1975         struct pci_dev *pdev = adapter->pdev;
1976         unsigned long size;
1977         unsigned int i, j;
1978
1979         /* Free all the Rx ring sk_buffs */
1980         for (i = 0; i < rx_ring->count; i++) {
1981                 buffer_info = &rx_ring->buffer_info[i];
1982                 if (buffer_info->skb) {
1983                         pci_unmap_single(pdev,
1984                                          buffer_info->dma,
1985                                          buffer_info->length,
1986                                          PCI_DMA_FROMDEVICE);
1987
1988                         dev_kfree_skb(buffer_info->skb);
1989                         buffer_info->skb = NULL;
1990                 }
1991                 ps_page = &rx_ring->ps_page[i];
1992                 ps_page_dma = &rx_ring->ps_page_dma[i];
1993                 for (j = 0; j < adapter->rx_ps_pages; j++) {
1994                         if (!ps_page->ps_page[j]) break;
1995                         pci_unmap_page(pdev,
1996                                        ps_page_dma->ps_page_dma[j],
1997                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
1998                         ps_page_dma->ps_page_dma[j] = 0;
1999                         put_page(ps_page->ps_page[j]);
2000                         ps_page->ps_page[j] = NULL;
2001                 }
2002         }
2003
2004         size = sizeof(struct e1000_buffer) * rx_ring->count;
2005         memset(rx_ring->buffer_info, 0, size);
2006         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2007         memset(rx_ring->ps_page, 0, size);
2008         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2009         memset(rx_ring->ps_page_dma, 0, size);
2010
2011         /* Zero out the descriptor ring */
2012
2013         memset(rx_ring->desc, 0, rx_ring->size);
2014
2015         rx_ring->next_to_clean = 0;
2016         rx_ring->next_to_use = 0;
2017
2018         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2019         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2020 }
2021
2022 /**
2023  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2024  * @adapter: board private structure
2025  **/
2026
2027 static void
2028 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2029 {
2030         int i;
2031
2032         for (i = 0; i < adapter->num_rx_queues; i++)
2033                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2034 }
2035
2036 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2037  * and memory write and invalidate disabled for certain operations
2038  */
2039 static void
2040 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2041 {
2042         struct net_device *netdev = adapter->netdev;
2043         uint32_t rctl;
2044
2045         e1000_pci_clear_mwi(&adapter->hw);
2046
2047         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2048         rctl |= E1000_RCTL_RST;
2049         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2050         E1000_WRITE_FLUSH(&adapter->hw);
2051         mdelay(5);
2052
2053         if (netif_running(netdev))
2054                 e1000_clean_all_rx_rings(adapter);
2055 }
2056
2057 static void
2058 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2059 {
2060         struct net_device *netdev = adapter->netdev;
2061         uint32_t rctl;
2062
2063         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2064         rctl &= ~E1000_RCTL_RST;
2065         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2066         E1000_WRITE_FLUSH(&adapter->hw);
2067         mdelay(5);
2068
2069         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2070                 e1000_pci_set_mwi(&adapter->hw);
2071
2072         if (netif_running(netdev)) {
2073                 /* No need to loop, because 82542 supports only 1 queue */
2074                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2075                 e1000_configure_rx(adapter);
2076                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2077         }
2078 }
2079
2080 /**
2081  * e1000_set_mac - Change the Ethernet Address of the NIC
2082  * @netdev: network interface device structure
2083  * @p: pointer to an address structure
2084  *
2085  * Returns 0 on success, negative on failure
2086  **/
2087
2088 static int
2089 e1000_set_mac(struct net_device *netdev, void *p)
2090 {
2091         struct e1000_adapter *adapter = netdev_priv(netdev);
2092         struct sockaddr *addr = p;
2093
2094         if (!is_valid_ether_addr(addr->sa_data))
2095                 return -EADDRNOTAVAIL;
2096
2097         /* 82542 2.0 needs to be in reset to write receive address registers */
2098
2099         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2100                 e1000_enter_82542_rst(adapter);
2101
2102         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2103         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2104
2105         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2106
2107         /* With 82571 controllers, LAA may be overwritten (with the default)
2108          * due to controller reset from the other port. */
2109         if (adapter->hw.mac_type == e1000_82571) {
2110                 /* activate the work around */
2111                 adapter->hw.laa_is_present = 1;
2112
2113                 /* Hold a copy of the LAA in RAR[14] This is done so that
2114                  * between the time RAR[0] gets clobbered  and the time it
2115                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2116                  * of the RARs and no incoming packets directed to this port
2117                  * are dropped. Eventaully the LAA will be in RAR[0] and
2118                  * RAR[14] */
2119                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2120                                         E1000_RAR_ENTRIES - 1);
2121         }
2122
2123         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2124                 e1000_leave_82542_rst(adapter);
2125
2126         return 0;
2127 }
2128
2129 /**
2130  * e1000_set_multi - Multicast and Promiscuous mode set
2131  * @netdev: network interface device structure
2132  *
2133  * The set_multi entry point is called whenever the multicast address
2134  * list or the network interface flags are updated.  This routine is
2135  * responsible for configuring the hardware for proper multicast,
2136  * promiscuous mode, and all-multi behavior.
2137  **/
2138
2139 static void
2140 e1000_set_multi(struct net_device *netdev)
2141 {
2142         struct e1000_adapter *adapter = netdev_priv(netdev);
2143         struct e1000_hw *hw = &adapter->hw;
2144         struct dev_mc_list *mc_ptr;
2145         uint32_t rctl;
2146         uint32_t hash_value;
2147         int i, rar_entries = E1000_RAR_ENTRIES;
2148
2149         /* reserve RAR[14] for LAA over-write work-around */
2150         if (adapter->hw.mac_type == e1000_82571)
2151                 rar_entries--;
2152
2153         /* Check for Promiscuous and All Multicast modes */
2154
2155         rctl = E1000_READ_REG(hw, RCTL);
2156
2157         if (netdev->flags & IFF_PROMISC) {
2158                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2159         } else if (netdev->flags & IFF_ALLMULTI) {
2160                 rctl |= E1000_RCTL_MPE;
2161                 rctl &= ~E1000_RCTL_UPE;
2162         } else {
2163                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2164         }
2165
2166         E1000_WRITE_REG(hw, RCTL, rctl);
2167
2168         /* 82542 2.0 needs to be in reset to write receive address registers */
2169
2170         if (hw->mac_type == e1000_82542_rev2_0)
2171                 e1000_enter_82542_rst(adapter);
2172
2173         /* load the first 14 multicast address into the exact filters 1-14
2174          * RAR 0 is used for the station MAC adddress
2175          * if there are not 14 addresses, go ahead and clear the filters
2176          * -- with 82571 controllers only 0-13 entries are filled here
2177          */
2178         mc_ptr = netdev->mc_list;
2179
2180         for (i = 1; i < rar_entries; i++) {
2181                 if (mc_ptr) {
2182                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2183                         mc_ptr = mc_ptr->next;
2184                 } else {
2185                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2186                         E1000_WRITE_FLUSH(hw);
2187                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2188                         E1000_WRITE_FLUSH(hw);
2189                 }
2190         }
2191
2192         /* clear the old settings from the multicast hash table */
2193
2194         for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++) {
2195                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2196                 E1000_WRITE_FLUSH(hw);
2197         }
2198
2199         /* load any remaining addresses into the hash table */
2200
2201         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2202                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2203                 e1000_mta_set(hw, hash_value);
2204         }
2205
2206         if (hw->mac_type == e1000_82542_rev2_0)
2207                 e1000_leave_82542_rst(adapter);
2208 }
2209
2210 /* Need to wait a few seconds after link up to get diagnostic information from
2211  * the phy */
2212
2213 static void
2214 e1000_update_phy_info(unsigned long data)
2215 {
2216         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2217         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2218 }
2219
2220 /**
2221  * e1000_82547_tx_fifo_stall - Timer Call-back
2222  * @data: pointer to adapter cast into an unsigned long
2223  **/
2224
2225 static void
2226 e1000_82547_tx_fifo_stall(unsigned long data)
2227 {
2228         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2229         struct net_device *netdev = adapter->netdev;
2230         uint32_t tctl;
2231
2232         if (atomic_read(&adapter->tx_fifo_stall)) {
2233                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2234                     E1000_READ_REG(&adapter->hw, TDH)) &&
2235                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2236                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2237                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2238                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2239                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2240                         E1000_WRITE_REG(&adapter->hw, TCTL,
2241                                         tctl & ~E1000_TCTL_EN);
2242                         E1000_WRITE_REG(&adapter->hw, TDFT,
2243                                         adapter->tx_head_addr);
2244                         E1000_WRITE_REG(&adapter->hw, TDFH,
2245                                         adapter->tx_head_addr);
2246                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2247                                         adapter->tx_head_addr);
2248                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2249                                         adapter->tx_head_addr);
2250                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2251                         E1000_WRITE_FLUSH(&adapter->hw);
2252
2253                         adapter->tx_fifo_head = 0;
2254                         atomic_set(&adapter->tx_fifo_stall, 0);
2255                         netif_wake_queue(netdev);
2256                 } else {
2257                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2258                 }
2259         }
2260 }
2261
2262 /**
2263  * e1000_watchdog - Timer Call-back
2264  * @data: pointer to adapter cast into an unsigned long
2265  **/
2266 static void
2267 e1000_watchdog(unsigned long data)
2268 {
2269         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2270         struct net_device *netdev = adapter->netdev;
2271         struct e1000_tx_ring *txdr = adapter->tx_ring;
2272         uint32_t link, tctl;
2273
2274         e1000_check_for_link(&adapter->hw);
2275         if (adapter->hw.mac_type == e1000_82573) {
2276                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2277                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2278                         e1000_update_mng_vlan(adapter);
2279         }
2280
2281         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2282            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2283                 link = !adapter->hw.serdes_link_down;
2284         else
2285                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2286
2287         if (link) {
2288                 if (!netif_carrier_ok(netdev)) {
2289                         boolean_t txb2b = 1;
2290                         e1000_get_speed_and_duplex(&adapter->hw,
2291                                                    &adapter->link_speed,
2292                                                    &adapter->link_duplex);
2293
2294                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2295                                adapter->link_speed,
2296                                adapter->link_duplex == FULL_DUPLEX ?
2297                                "Full Duplex" : "Half Duplex");
2298
2299                         /* tweak tx_queue_len according to speed/duplex
2300                          * and adjust the timeout factor */
2301                         netdev->tx_queue_len = adapter->tx_queue_len;
2302                         adapter->tx_timeout_factor = 1;
2303                         switch (adapter->link_speed) {
2304                         case SPEED_10:
2305                                 txb2b = 0;
2306                                 netdev->tx_queue_len = 10;
2307                                 adapter->tx_timeout_factor = 8;
2308                                 break;
2309                         case SPEED_100:
2310                                 txb2b = 0;
2311                                 netdev->tx_queue_len = 100;
2312                                 /* maybe add some timeout factor ? */
2313                                 break;
2314                         }
2315
2316                         if ((adapter->hw.mac_type == e1000_82571 ||
2317                              adapter->hw.mac_type == e1000_82572) &&
2318                             txb2b == 0) {
2319 #define SPEED_MODE_BIT (1 << 21)
2320                                 uint32_t tarc0;
2321                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2322                                 tarc0 &= ~SPEED_MODE_BIT;
2323                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2324                         }
2325
2326 #ifdef NETIF_F_TSO
2327                         /* disable TSO for pcie and 10/100 speeds, to avoid
2328                          * some hardware issues */
2329                         if (!adapter->tso_force &&
2330                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2331                                 switch (adapter->link_speed) {
2332                                 case SPEED_10:
2333                                 case SPEED_100:
2334                                         DPRINTK(PROBE,INFO,
2335                                         "10/100 speed: disabling TSO\n");
2336                                         netdev->features &= ~NETIF_F_TSO;
2337                                         break;
2338                                 case SPEED_1000:
2339                                         netdev->features |= NETIF_F_TSO;
2340                                         break;
2341                                 default:
2342                                         /* oops */
2343                                         break;
2344                                 }
2345                         }
2346 #endif
2347
2348                         /* enable transmits in the hardware, need to do this
2349                          * after setting TARC0 */
2350                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2351                         tctl |= E1000_TCTL_EN;
2352                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2353
2354                         netif_carrier_on(netdev);
2355                         netif_wake_queue(netdev);
2356                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2357                         adapter->smartspeed = 0;
2358                 }
2359         } else {
2360                 if (netif_carrier_ok(netdev)) {
2361                         adapter->link_speed = 0;
2362                         adapter->link_duplex = 0;
2363                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2364                         netif_carrier_off(netdev);
2365                         netif_stop_queue(netdev);
2366                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2367
2368                         /* 80003ES2LAN workaround--
2369                          * For packet buffer work-around on link down event;
2370                          * disable receives in the ISR and
2371                          * reset device here in the watchdog
2372                          */
2373                         if (adapter->hw.mac_type == e1000_80003es2lan) {
2374                                 /* reset device */
2375                                 schedule_work(&adapter->reset_task);
2376                         }
2377                 }
2378
2379                 e1000_smartspeed(adapter);
2380         }
2381
2382         e1000_update_stats(adapter);
2383
2384         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2385         adapter->tpt_old = adapter->stats.tpt;
2386         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2387         adapter->colc_old = adapter->stats.colc;
2388
2389         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2390         adapter->gorcl_old = adapter->stats.gorcl;
2391         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2392         adapter->gotcl_old = adapter->stats.gotcl;
2393
2394         e1000_update_adaptive(&adapter->hw);
2395
2396         if (!netif_carrier_ok(netdev)) {
2397                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2398                         /* We've lost link, so the controller stops DMA,
2399                          * but we've got queued Tx work that's never going
2400                          * to get done, so reset controller to flush Tx.
2401                          * (Do the reset outside of interrupt context). */
2402                         adapter->tx_timeout_count++;
2403                         schedule_work(&adapter->reset_task);
2404                 }
2405         }
2406
2407         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2408         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2409                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2410                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2411                  * else is between 2000-8000. */
2412                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2413                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2414                         adapter->gotcl - adapter->gorcl :
2415                         adapter->gorcl - adapter->gotcl) / 10000;
2416                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2417                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2418         }
2419
2420         /* Cause software interrupt to ensure rx ring is cleaned */
2421         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2422
2423         /* Force detection of hung controller every watchdog period */
2424         adapter->detect_tx_hung = TRUE;
2425
2426         /* With 82571 controllers, LAA may be overwritten due to controller
2427          * reset from the other port. Set the appropriate LAA in RAR[0] */
2428         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2429                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2430
2431         /* Reset the timer */
2432         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2433 }
2434
2435 #define E1000_TX_FLAGS_CSUM             0x00000001
2436 #define E1000_TX_FLAGS_VLAN             0x00000002
2437 #define E1000_TX_FLAGS_TSO              0x00000004
2438 #define E1000_TX_FLAGS_IPV4             0x00000008
2439 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2440 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2441
2442 static int
2443 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2444           struct sk_buff *skb)
2445 {
2446 #ifdef NETIF_F_TSO
2447         struct e1000_context_desc *context_desc;
2448         struct e1000_buffer *buffer_info;
2449         unsigned int i;
2450         uint32_t cmd_length = 0;
2451         uint16_t ipcse = 0, tucse, mss;
2452         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2453         int err;
2454
2455         if (skb_shinfo(skb)->tso_size) {
2456                 if (skb_header_cloned(skb)) {
2457                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2458                         if (err)
2459                                 return err;
2460                 }
2461
2462                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2463                 mss = skb_shinfo(skb)->tso_size;
2464                 if (skb->protocol == htons(ETH_P_IP)) {
2465                         skb->nh.iph->tot_len = 0;
2466                         skb->nh.iph->check = 0;
2467                         skb->h.th->check =
2468                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2469                                                    skb->nh.iph->daddr,
2470                                                    0,
2471                                                    IPPROTO_TCP,
2472                                                    0);
2473                         cmd_length = E1000_TXD_CMD_IP;
2474                         ipcse = skb->h.raw - skb->data - 1;
2475 #ifdef NETIF_F_TSO_IPV6
2476                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2477                         skb->nh.ipv6h->payload_len = 0;
2478                         skb->h.th->check =
2479                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2480                                                  &skb->nh.ipv6h->daddr,
2481                                                  0,
2482                                                  IPPROTO_TCP,
2483                                                  0);
2484                         ipcse = 0;
2485 #endif
2486                 }
2487                 ipcss = skb->nh.raw - skb->data;
2488                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2489                 tucss = skb->h.raw - skb->data;
2490                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2491                 tucse = 0;
2492
2493                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2494                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2495
2496                 i = tx_ring->next_to_use;
2497                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2498                 buffer_info = &tx_ring->buffer_info[i];
2499
2500                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2501                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2502                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2503                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2504                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2505                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2506                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2507                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2508                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2509
2510                 buffer_info->time_stamp = jiffies;
2511
2512                 if (++i == tx_ring->count) i = 0;
2513                 tx_ring->next_to_use = i;
2514
2515                 return TRUE;
2516         }
2517 #endif
2518
2519         return FALSE;
2520 }
2521
2522 static boolean_t
2523 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2524               struct sk_buff *skb)
2525 {
2526         struct e1000_context_desc *context_desc;
2527         struct e1000_buffer *buffer_info;
2528         unsigned int i;
2529         uint8_t css;
2530
2531         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2532                 css = skb->h.raw - skb->data;
2533
2534                 i = tx_ring->next_to_use;
2535                 buffer_info = &tx_ring->buffer_info[i];
2536                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2537
2538                 context_desc->upper_setup.tcp_fields.tucss = css;
2539                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2540                 context_desc->upper_setup.tcp_fields.tucse = 0;
2541                 context_desc->tcp_seg_setup.data = 0;
2542                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2543
2544                 buffer_info->time_stamp = jiffies;
2545
2546                 if (unlikely(++i == tx_ring->count)) i = 0;
2547                 tx_ring->next_to_use = i;
2548
2549                 return TRUE;
2550         }
2551
2552         return FALSE;
2553 }
2554
2555 #define E1000_MAX_TXD_PWR       12
2556 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2557
2558 static int
2559 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2560              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2561              unsigned int nr_frags, unsigned int mss)
2562 {
2563         struct e1000_buffer *buffer_info;
2564         unsigned int len = skb->len;
2565         unsigned int offset = 0, size, count = 0, i;
2566         unsigned int f;
2567         len -= skb->data_len;
2568
2569         i = tx_ring->next_to_use;
2570
2571         while (len) {
2572                 buffer_info = &tx_ring->buffer_info[i];
2573                 size = min(len, max_per_txd);
2574 #ifdef NETIF_F_TSO
2575                 /* Workaround for Controller erratum --
2576                  * descriptor for non-tso packet in a linear SKB that follows a
2577                  * tso gets written back prematurely before the data is fully
2578                  * DMA'd to the controller */
2579                 if (!skb->data_len && tx_ring->last_tx_tso &&
2580                     !skb_shinfo(skb)->tso_size) {
2581                         tx_ring->last_tx_tso = 0;
2582                         size -= 4;
2583                 }
2584
2585                 /* Workaround for premature desc write-backs
2586                  * in TSO mode.  Append 4-byte sentinel desc */
2587                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2588                         size -= 4;
2589 #endif
2590                 /* work-around for errata 10 and it applies
2591                  * to all controllers in PCI-X mode
2592                  * The fix is to make sure that the first descriptor of a
2593                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2594                  */
2595                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2596                                 (size > 2015) && count == 0))
2597                         size = 2015;
2598
2599                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2600                  * terminating buffers within evenly-aligned dwords. */
2601                 if (unlikely(adapter->pcix_82544 &&
2602                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2603                    size > 4))
2604                         size -= 4;
2605
2606                 buffer_info->length = size;
2607                 buffer_info->dma =
2608                         pci_map_single(adapter->pdev,
2609                                 skb->data + offset,
2610                                 size,
2611                                 PCI_DMA_TODEVICE);
2612                 buffer_info->time_stamp = jiffies;
2613
2614                 len -= size;
2615                 offset += size;
2616                 count++;
2617                 if (unlikely(++i == tx_ring->count)) i = 0;
2618         }
2619
2620         for (f = 0; f < nr_frags; f++) {
2621                 struct skb_frag_struct *frag;
2622
2623                 frag = &skb_shinfo(skb)->frags[f];
2624                 len = frag->size;
2625                 offset = frag->page_offset;
2626
2627                 while (len) {
2628                         buffer_info = &tx_ring->buffer_info[i];
2629                         size = min(len, max_per_txd);
2630 #ifdef NETIF_F_TSO
2631                         /* Workaround for premature desc write-backs
2632                          * in TSO mode.  Append 4-byte sentinel desc */
2633                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2634                                 size -= 4;
2635 #endif
2636                         /* Workaround for potential 82544 hang in PCI-X.
2637                          * Avoid terminating buffers within evenly-aligned
2638                          * dwords. */
2639                         if (unlikely(adapter->pcix_82544 &&
2640                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2641                            size > 4))
2642                                 size -= 4;
2643
2644                         buffer_info->length = size;
2645                         buffer_info->dma =
2646                                 pci_map_page(adapter->pdev,
2647                                         frag->page,
2648                                         offset,
2649                                         size,
2650                                         PCI_DMA_TODEVICE);
2651                         buffer_info->time_stamp = jiffies;
2652
2653                         len -= size;
2654                         offset += size;
2655                         count++;
2656                         if (unlikely(++i == tx_ring->count)) i = 0;
2657                 }
2658         }
2659
2660         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2661         tx_ring->buffer_info[i].skb = skb;
2662         tx_ring->buffer_info[first].next_to_watch = i;
2663
2664         return count;
2665 }
2666
2667 static void
2668 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2669                int tx_flags, int count)
2670 {
2671         struct e1000_tx_desc *tx_desc = NULL;
2672         struct e1000_buffer *buffer_info;
2673         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2674         unsigned int i;
2675
2676         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2677                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2678                              E1000_TXD_CMD_TSE;
2679                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2680
2681                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2682                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2683         }
2684
2685         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2686                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2687                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2688         }
2689
2690         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2691                 txd_lower |= E1000_TXD_CMD_VLE;
2692                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2693         }
2694
2695         i = tx_ring->next_to_use;
2696
2697         while (count--) {
2698                 buffer_info = &tx_ring->buffer_info[i];
2699                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2700                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2701                 tx_desc->lower.data =
2702                         cpu_to_le32(txd_lower | buffer_info->length);
2703                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2704                 if (unlikely(++i == tx_ring->count)) i = 0;
2705         }
2706
2707         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2708
2709         /* Force memory writes to complete before letting h/w
2710          * know there are new descriptors to fetch.  (Only
2711          * applicable for weak-ordered memory model archs,
2712          * such as IA-64). */
2713         wmb();
2714
2715         tx_ring->next_to_use = i;
2716         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2717 }
2718
2719 /**
2720  * 82547 workaround to avoid controller hang in half-duplex environment.
2721  * The workaround is to avoid queuing a large packet that would span
2722  * the internal Tx FIFO ring boundary by notifying the stack to resend
2723  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2724  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2725  * to the beginning of the Tx FIFO.
2726  **/
2727
2728 #define E1000_FIFO_HDR                  0x10
2729 #define E1000_82547_PAD_LEN             0x3E0
2730
2731 static int
2732 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2733 {
2734         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2735         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2736
2737         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2738
2739         if (adapter->link_duplex != HALF_DUPLEX)
2740                 goto no_fifo_stall_required;
2741
2742         if (atomic_read(&adapter->tx_fifo_stall))
2743                 return 1;
2744
2745         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2746                 atomic_set(&adapter->tx_fifo_stall, 1);
2747                 return 1;
2748         }
2749
2750 no_fifo_stall_required:
2751         adapter->tx_fifo_head += skb_fifo_len;
2752         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2753                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2754         return 0;
2755 }
2756
2757 #define MINIMUM_DHCP_PACKET_SIZE 282
2758 static int
2759 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2760 {
2761         struct e1000_hw *hw =  &adapter->hw;
2762         uint16_t length, offset;
2763         if (vlan_tx_tag_present(skb)) {
2764                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2765                         ( adapter->hw.mng_cookie.status &
2766                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2767                         return 0;
2768         }
2769         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2770                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2771                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2772                         const struct iphdr *ip =
2773                                 (struct iphdr *)((uint8_t *)skb->data+14);
2774                         if (IPPROTO_UDP == ip->protocol) {
2775                                 struct udphdr *udp =
2776                                         (struct udphdr *)((uint8_t *)ip +
2777                                                 (ip->ihl << 2));
2778                                 if (ntohs(udp->dest) == 67) {
2779                                         offset = (uint8_t *)udp + 8 - skb->data;
2780                                         length = skb->len - offset;
2781
2782                                         return e1000_mng_write_dhcp_info(hw,
2783                                                         (uint8_t *)udp + 8,
2784                                                         length);
2785                                 }
2786                         }
2787                 }
2788         }
2789         return 0;
2790 }
2791
2792 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2793 static int
2794 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2795 {
2796         struct e1000_adapter *adapter = netdev_priv(netdev);
2797         struct e1000_tx_ring *tx_ring;
2798         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2799         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2800         unsigned int tx_flags = 0;
2801         unsigned int len = skb->len;
2802         unsigned long flags;
2803         unsigned int nr_frags = 0;
2804         unsigned int mss = 0;
2805         int count = 0;
2806         int tso;
2807         unsigned int f;
2808         len -= skb->data_len;
2809
2810         tx_ring = adapter->tx_ring;
2811
2812         if (unlikely(skb->len <= 0)) {
2813                 dev_kfree_skb_any(skb);
2814                 return NETDEV_TX_OK;
2815         }
2816
2817 #ifdef NETIF_F_TSO
2818         mss = skb_shinfo(skb)->tso_size;
2819         /* The controller does a simple calculation to
2820          * make sure there is enough room in the FIFO before
2821          * initiating the DMA for each buffer.  The calc is:
2822          * 4 = ceil(buffer len/mss).  To make sure we don't
2823          * overrun the FIFO, adjust the max buffer len if mss
2824          * drops. */
2825         if (mss) {
2826                 uint8_t hdr_len;
2827                 max_per_txd = min(mss << 2, max_per_txd);
2828                 max_txd_pwr = fls(max_per_txd) - 1;
2829
2830         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2831          * points to just header, pull a few bytes of payload from
2832          * frags into skb->data */
2833                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2834                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2835                         switch (adapter->hw.mac_type) {
2836                                 unsigned int pull_size;
2837                         case e1000_82571:
2838                         case e1000_82572:
2839                         case e1000_82573:
2840                                 pull_size = min((unsigned int)4, skb->data_len);
2841                                 if (!__pskb_pull_tail(skb, pull_size)) {
2842                                         DPRINTK(DRV, ERR,
2843                                                 "__pskb_pull_tail failed.\n");
2844                                         dev_kfree_skb_any(skb);
2845                                         return NETDEV_TX_OK;
2846                                 }
2847                                 len = skb->len - skb->data_len;
2848                                 break;
2849                         default:
2850                                 /* do nothing */
2851                                 break;
2852                         }
2853                 }
2854         }
2855
2856         /* reserve a descriptor for the offload context */
2857         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2858                 count++;
2859         count++;
2860 #else
2861         if (skb->ip_summed == CHECKSUM_HW)
2862                 count++;
2863 #endif
2864
2865 #ifdef NETIF_F_TSO
2866         /* Controller Erratum workaround */
2867         if (!skb->data_len && tx_ring->last_tx_tso &&
2868             !skb_shinfo(skb)->tso_size)
2869                 count++;
2870 #endif
2871
2872         count += TXD_USE_COUNT(len, max_txd_pwr);
2873
2874         if (adapter->pcix_82544)
2875                 count++;
2876
2877         /* work-around for errata 10 and it applies to all controllers
2878          * in PCI-X mode, so add one more descriptor to the count
2879          */
2880         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2881                         (len > 2015)))
2882                 count++;
2883
2884         nr_frags = skb_shinfo(skb)->nr_frags;
2885         for (f = 0; f < nr_frags; f++)
2886                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2887                                        max_txd_pwr);
2888         if (adapter->pcix_82544)
2889                 count += nr_frags;
2890
2891
2892         if (adapter->hw.tx_pkt_filtering &&
2893             (adapter->hw.mac_type == e1000_82573))
2894                 e1000_transfer_dhcp_info(adapter, skb);
2895
2896         local_irq_save(flags);
2897         if (!spin_trylock(&tx_ring->tx_lock)) {
2898                 /* Collision - tell upper layer to requeue */
2899                 local_irq_restore(flags);
2900                 return NETDEV_TX_LOCKED;
2901         }
2902
2903         /* need: count + 2 desc gap to keep tail from touching
2904          * head, otherwise try next time */
2905         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2906                 netif_stop_queue(netdev);
2907                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2908                 return NETDEV_TX_BUSY;
2909         }
2910
2911         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2912                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2913                         netif_stop_queue(netdev);
2914                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2915                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2916                         return NETDEV_TX_BUSY;
2917                 }
2918         }
2919
2920         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2921                 tx_flags |= E1000_TX_FLAGS_VLAN;
2922                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2923         }
2924
2925         first = tx_ring->next_to_use;
2926
2927         tso = e1000_tso(adapter, tx_ring, skb);
2928         if (tso < 0) {
2929                 dev_kfree_skb_any(skb);
2930                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2931                 return NETDEV_TX_OK;
2932         }
2933
2934         if (likely(tso)) {
2935                 tx_ring->last_tx_tso = 1;
2936                 tx_flags |= E1000_TX_FLAGS_TSO;
2937         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2938                 tx_flags |= E1000_TX_FLAGS_CSUM;
2939
2940         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2941          * 82571 hardware supports TSO capabilities for IPv6 as well...
2942          * no longer assume, we must. */
2943         if (likely(skb->protocol == htons(ETH_P_IP)))
2944                 tx_flags |= E1000_TX_FLAGS_IPV4;
2945
2946         e1000_tx_queue(adapter, tx_ring, tx_flags,
2947                        e1000_tx_map(adapter, tx_ring, skb, first,
2948                                     max_per_txd, nr_frags, mss));
2949
2950         netdev->trans_start = jiffies;
2951
2952         /* Make sure there is space in the ring for the next send. */
2953         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2954                 netif_stop_queue(netdev);
2955
2956         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2957         return NETDEV_TX_OK;
2958 }
2959
2960 /**
2961  * e1000_tx_timeout - Respond to a Tx Hang
2962  * @netdev: network interface device structure
2963  **/
2964
2965 static void
2966 e1000_tx_timeout(struct net_device *netdev)
2967 {
2968         struct e1000_adapter *adapter = netdev_priv(netdev);
2969
2970         /* Do the reset outside of interrupt context */
2971         adapter->tx_timeout_count++;
2972         schedule_work(&adapter->reset_task);
2973 }
2974
2975 static void
2976 e1000_reset_task(struct net_device *netdev)
2977 {
2978         struct e1000_adapter *adapter = netdev_priv(netdev);
2979
2980         e1000_reinit_locked(adapter);
2981 }
2982
2983 /**
2984  * e1000_get_stats - Get System Network Statistics
2985  * @netdev: network interface device structure
2986  *
2987  * Returns the address of the device statistics structure.
2988  * The statistics are actually updated from the timer callback.
2989  **/
2990
2991 static struct net_device_stats *
2992 e1000_get_stats(struct net_device *netdev)
2993 {
2994         struct e1000_adapter *adapter = netdev_priv(netdev);
2995
2996         /* only return the current stats */
2997         return &adapter->net_stats;
2998 }
2999
3000 /**
3001  * e1000_change_mtu - Change the Maximum Transfer Unit
3002  * @netdev: network interface device structure
3003  * @new_mtu: new value for maximum frame size
3004  *
3005  * Returns 0 on success, negative on failure
3006  **/
3007
3008 static int
3009 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3010 {
3011         struct e1000_adapter *adapter = netdev_priv(netdev);
3012         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3013         uint16_t eeprom_data = 0;
3014
3015         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3016             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3017                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3018                 return -EINVAL;
3019         }
3020
3021         /* Adapter-specific max frame size limits. */
3022         switch (adapter->hw.mac_type) {
3023         case e1000_undefined ... e1000_82542_rev2_1:
3024                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3025                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3026                         return -EINVAL;
3027                 }
3028                 break;
3029         case e1000_82573:
3030                 /* only enable jumbo frames if ASPM is disabled completely
3031                  * this means both bits must be zero in 0x1A bits 3:2 */
3032                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3033                                   &eeprom_data);
3034                 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3035                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3036                                 DPRINTK(PROBE, ERR,
3037                                         "Jumbo Frames not supported.\n");
3038                                 return -EINVAL;
3039                         }
3040                         break;
3041                 }
3042                 /* fall through to get support */
3043         case e1000_82571:
3044         case e1000_82572:
3045         case e1000_80003es2lan:
3046 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3047                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3048                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3049                         return -EINVAL;
3050                 }
3051                 break;
3052         default:
3053                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3054                 break;
3055         }
3056
3057         /* NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3058          * means we reserve 2 more, this pushes us to allocate from the next
3059          * larger slab size
3060          * i.e. RXBUFFER_2048 --> size-4096 slab */
3061
3062         if (max_frame <= E1000_RXBUFFER_256)
3063                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3064         else if (max_frame <= E1000_RXBUFFER_512)
3065                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3066         else if (max_frame <= E1000_RXBUFFER_1024)
3067                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3068         else if (max_frame <= E1000_RXBUFFER_2048)
3069                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3070         else if (max_frame <= E1000_RXBUFFER_4096)
3071                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3072         else if (max_frame <= E1000_RXBUFFER_8192)
3073                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3074         else if (max_frame <= E1000_RXBUFFER_16384)
3075                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3076
3077         /* adjust allocation if LPE protects us, and we aren't using SBP */
3078 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
3079         if (!adapter->hw.tbi_compatibility_on &&
3080             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3081              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3082                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3083
3084         netdev->mtu = new_mtu;
3085
3086         if (netif_running(netdev))
3087                 e1000_reinit_locked(adapter);
3088
3089         adapter->hw.max_frame_size = max_frame;
3090
3091         return 0;
3092 }
3093
3094 /**
3095  * e1000_update_stats - Update the board statistics counters
3096  * @adapter: board private structure
3097  **/
3098
3099 void
3100 e1000_update_stats(struct e1000_adapter *adapter)
3101 {
3102         struct e1000_hw *hw = &adapter->hw;
3103         struct pci_dev *pdev = adapter->pdev;
3104         unsigned long flags;
3105         uint16_t phy_tmp;
3106
3107 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3108
3109         /*
3110          * Prevent stats update while adapter is being reset, or if the pci
3111          * connection is down.
3112          */
3113         if (adapter->link_speed == 0)
3114                 return;
3115         if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3116                 return;
3117
3118         spin_lock_irqsave(&adapter->stats_lock, flags);
3119
3120         /* these counters are modified from e1000_adjust_tbi_stats,
3121          * called from the interrupt context, so they must only
3122          * be written while holding adapter->stats_lock
3123          */
3124
3125         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3126         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3127         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3128         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3129         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3130         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3131         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3132         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3133         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3134         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3135         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3136         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3137         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3138
3139         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3140         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3141         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3142         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3143         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3144         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3145         adapter->stats.dc += E1000_READ_REG(hw, DC);
3146         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3147         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3148         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3149         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3150         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3151         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3152         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3153         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3154         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3155         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3156         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3157         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3158         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3159         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3160         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3161         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3162         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3163         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3164         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3165         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3166         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3167         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3168         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3169         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3170         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3171         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3172         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3173
3174         /* used for adaptive IFS */
3175
3176         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3177         adapter->stats.tpt += hw->tx_packet_delta;
3178         hw->collision_delta = E1000_READ_REG(hw, COLC);
3179         adapter->stats.colc += hw->collision_delta;
3180
3181         if (hw->mac_type >= e1000_82543) {
3182                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3183                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3184                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3185                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3186                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3187                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3188         }
3189         if (hw->mac_type > e1000_82547_rev_2) {
3190                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3191                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3192                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3193                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3194                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3195                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3196                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3197                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3198                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3199         }
3200
3201         /* Fill out the OS statistics structure */
3202
3203         adapter->net_stats.rx_packets = adapter->stats.gprc;
3204         adapter->net_stats.tx_packets = adapter->stats.gptc;
3205         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3206         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3207         adapter->net_stats.multicast = adapter->stats.mprc;
3208         adapter->net_stats.collisions = adapter->stats.colc;
3209
3210         /* Rx Errors */
3211
3212         /* RLEC on some newer hardware can be incorrect so build
3213         * our own version based on RUC and ROC */
3214         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3215                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3216                 adapter->stats.ruc + adapter->stats.roc +
3217                 adapter->stats.cexterr;
3218         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3219                                               adapter->stats.roc;
3220         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3221         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3222         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3223
3224         /* Tx Errors */
3225
3226         adapter->net_stats.tx_errors = adapter->stats.ecol +
3227                                        adapter->stats.latecol;
3228         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3229         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3230         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3231
3232         /* Tx Dropped needs to be maintained elsewhere */
3233
3234         /* Phy Stats */
3235
3236         if (hw->media_type == e1000_media_type_copper) {
3237                 if ((adapter->link_speed == SPEED_1000) &&
3238                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3239                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3240                         adapter->phy_stats.idle_errors += phy_tmp;
3241                 }
3242
3243                 if ((hw->mac_type <= e1000_82546) &&
3244                    (hw->phy_type == e1000_phy_m88) &&
3245                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3246                         adapter->phy_stats.receive_errors += phy_tmp;
3247         }
3248
3249         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3250 }
3251
3252 /**
3253  * e1000_intr - Interrupt Handler
3254  * @irq: interrupt number
3255  * @data: pointer to a network interface device structure
3256  * @pt_regs: CPU registers structure
3257  **/
3258
3259 static irqreturn_t
3260 e1000_intr(int irq, void *data, struct pt_regs *regs)
3261 {
3262         struct net_device *netdev = data;
3263         struct e1000_adapter *adapter = netdev_priv(netdev);
3264         struct e1000_hw *hw = &adapter->hw;
3265         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3266 #ifndef CONFIG_E1000_NAPI
3267         int i;
3268 #else
3269         /* Interrupt Auto-Mask...upon reading ICR,
3270          * interrupts are masked.  No need for the
3271          * IMC write, but it does mean we should
3272          * account for it ASAP. */
3273         if (likely(hw->mac_type >= e1000_82571))
3274                 atomic_inc(&adapter->irq_sem);
3275 #endif
3276
3277         if (unlikely(!icr)) {
3278 #ifdef CONFIG_E1000_NAPI
3279                 if (hw->mac_type >= e1000_82571)
3280                         e1000_irq_enable(adapter);
3281 #endif
3282                 return IRQ_NONE;  /* Not our interrupt */
3283         }
3284
3285         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3286                 hw->get_link_status = 1;
3287                 /* 80003ES2LAN workaround--
3288                  * For packet buffer work-around on link down event;
3289                  * disable receives here in the ISR and
3290                  * reset adapter in watchdog
3291                  */
3292                 if (netif_carrier_ok(netdev) &&
3293                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3294                         /* disable receives */
3295                         rctl = E1000_READ_REG(hw, RCTL);
3296                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3297                 }
3298                 mod_timer(&adapter->watchdog_timer, jiffies);
3299         }
3300
3301 #ifdef CONFIG_E1000_NAPI
3302         if (unlikely(hw->mac_type < e1000_82571)) {
3303                 atomic_inc(&adapter->irq_sem);
3304                 E1000_WRITE_REG(hw, IMC, ~0);
3305                 E1000_WRITE_FLUSH(hw);
3306         }
3307         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3308                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3309         else
3310                 e1000_irq_enable(adapter);
3311 #else
3312         /* Writing IMC and IMS is needed for 82547.
3313          * Due to Hub Link bus being occupied, an interrupt
3314          * de-assertion message is not able to be sent.
3315          * When an interrupt assertion message is generated later,
3316          * two messages are re-ordered and sent out.
3317          * That causes APIC to think 82547 is in de-assertion
3318          * state, while 82547 is in assertion state, resulting
3319          * in dead lock. Writing IMC forces 82547 into
3320          * de-assertion state.
3321          */
3322         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3323                 atomic_inc(&adapter->irq_sem);
3324                 E1000_WRITE_REG(hw, IMC, ~0);
3325         }
3326
3327         for (i = 0; i < E1000_MAX_INTR; i++)
3328                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3329                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3330                         break;
3331
3332         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3333                 e1000_irq_enable(adapter);
3334
3335 #endif
3336
3337         return IRQ_HANDLED;
3338 }
3339
3340 #ifdef CONFIG_E1000_NAPI
3341 /**
3342  * e1000_clean - NAPI Rx polling callback
3343  * @adapter: board private structure
3344  **/
3345
3346 static int
3347 e1000_clean(struct net_device *poll_dev, int *budget)
3348 {
3349         struct e1000_adapter *adapter;
3350         int work_to_do = min(*budget, poll_dev->quota);
3351         int tx_cleaned = 0, i = 0, work_done = 0;
3352
3353         /* Must NOT use netdev_priv macro here. */
3354         adapter = poll_dev->priv;
3355
3356         /* Keep link state information with original netdev */
3357         if (!netif_carrier_ok(adapter->netdev))
3358                 goto quit_polling;
3359
3360         while (poll_dev != &adapter->polling_netdev[i]) {
3361                 i++;
3362                 BUG_ON(i == adapter->num_rx_queues);
3363         }
3364
3365         if (likely(adapter->num_tx_queues == 1)) {
3366                 /* e1000_clean is called per-cpu.  This lock protects
3367                  * tx_ring[0] from being cleaned by multiple cpus
3368                  * simultaneously.  A failure obtaining the lock means
3369                  * tx_ring[0] is currently being cleaned anyway. */
3370                 if (spin_trylock(&adapter->tx_queue_lock)) {
3371                         tx_cleaned = e1000_clean_tx_irq(adapter,
3372                                                         &adapter->tx_ring[0]);
3373                         spin_unlock(&adapter->tx_queue_lock);
3374                 }
3375         } else
3376                 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3377
3378         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3379                           &work_done, work_to_do);
3380
3381         *budget -= work_done;
3382         poll_dev->quota -= work_done;
3383
3384         /* If no Tx and not enough Rx work done, exit the polling mode */
3385         if ((!tx_cleaned && (work_done == 0)) ||
3386            !netif_running(adapter->netdev)) {
3387 quit_polling:
3388                 netif_rx_complete(poll_dev);
3389                 e1000_irq_enable(adapter);
3390                 return 0;
3391         }
3392
3393         return 1;
3394 }
3395
3396 #endif
3397 /**
3398  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3399  * @adapter: board private structure
3400  **/
3401
3402 static boolean_t
3403 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3404                    struct e1000_tx_ring *tx_ring)
3405 {
3406         struct net_device *netdev = adapter->netdev;
3407         struct e1000_tx_desc *tx_desc, *eop_desc;
3408         struct e1000_buffer *buffer_info;
3409         unsigned int i, eop;
3410 #ifdef CONFIG_E1000_NAPI
3411         unsigned int count = 0;
3412 #endif
3413         boolean_t cleaned = FALSE;
3414
3415         i = tx_ring->next_to_clean;
3416         eop = tx_ring->buffer_info[i].next_to_watch;
3417         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3418
3419         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3420                 for (cleaned = FALSE; !cleaned; ) {
3421                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3422                         buffer_info = &tx_ring->buffer_info[i];
3423                         cleaned = (i == eop);
3424
3425                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3426                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3427
3428                         if (unlikely(++i == tx_ring->count)) i = 0;
3429                 }
3430
3431
3432                 eop = tx_ring->buffer_info[i].next_to_watch;
3433                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3434 #ifdef CONFIG_E1000_NAPI
3435 #define E1000_TX_WEIGHT 64
3436                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3437                 if (count++ == E1000_TX_WEIGHT) break;
3438 #endif
3439         }
3440
3441         tx_ring->next_to_clean = i;
3442
3443 #define TX_WAKE_THRESHOLD 32
3444         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3445                      netif_carrier_ok(netdev))) {
3446                 spin_lock(&tx_ring->tx_lock);
3447                 if (netif_queue_stopped(netdev) &&
3448                     (E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))
3449                         netif_wake_queue(netdev);
3450                 spin_unlock(&tx_ring->tx_lock);
3451         }
3452
3453         if (adapter->detect_tx_hung) {
3454                 /* Detect a transmit hang in hardware, this serializes the
3455                  * check with the clearing of time_stamp and movement of i */
3456                 adapter->detect_tx_hung = FALSE;
3457                 if (tx_ring->buffer_info[eop].dma &&
3458                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3459                                (adapter->tx_timeout_factor * HZ))
3460                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3461                          E1000_STATUS_TXOFF)) {
3462
3463                         /* detected Tx unit hang */
3464                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3465                                         "  Tx Queue             <%lu>\n"
3466                                         "  TDH                  <%x>\n"
3467                                         "  TDT                  <%x>\n"
3468                                         "  next_to_use          <%x>\n"
3469                                         "  next_to_clean        <%x>\n"
3470                                         "buffer_info[next_to_clean]\n"
3471                                         "  time_stamp           <%lx>\n"
3472                                         "  next_to_watch        <%x>\n"
3473                                         "  jiffies              <%lx>\n"
3474                                         "  next_to_watch.status <%x>\n",
3475                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3476                                         sizeof(struct e1000_tx_ring)),
3477                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3478                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3479                                 tx_ring->next_to_use,
3480                                 tx_ring->next_to_clean,
3481                                 tx_ring->buffer_info[eop].time_stamp,
3482                                 eop,
3483                                 jiffies,
3484                                 eop_desc->upper.fields.status);
3485                         netif_stop_queue(netdev);
3486                 }
3487         }
3488         return cleaned;
3489 }
3490
3491 /**
3492  * e1000_rx_checksum - Receive Checksum Offload for 82543
3493  * @adapter:     board private structure
3494  * @status_err:  receive descriptor status and error fields
3495  * @csum:        receive descriptor csum field
3496  * @sk_buff:     socket buffer with received data
3497  **/
3498
3499 static void
3500 e1000_rx_checksum(struct e1000_adapter *adapter,
3501                   uint32_t status_err, uint32_t csum,
3502                   struct sk_buff *skb)
3503 {
3504         uint16_t status = (uint16_t)status_err;
3505         uint8_t errors = (uint8_t)(status_err >> 24);
3506         skb->ip_summed = CHECKSUM_NONE;
3507
3508         /* 82543 or newer only */
3509         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3510         /* Ignore Checksum bit is set */
3511         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3512         /* TCP/UDP checksum error bit is set */
3513         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3514                 /* let the stack verify checksum errors */
3515                 adapter->hw_csum_err++;
3516                 return;
3517         }
3518         /* TCP/UDP Checksum has not been calculated */
3519         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3520                 if (!(status & E1000_RXD_STAT_TCPCS))
3521                         return;
3522         } else {
3523                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3524                         return;
3525         }
3526         /* It must be a TCP or UDP packet with a valid checksum */
3527         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3528                 /* TCP checksum is good */
3529                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3530         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3531                 /* IP fragment with UDP payload */
3532                 /* Hardware complements the payload checksum, so we undo it
3533                  * and then put the value in host order for further stack use.
3534                  */
3535                 csum = ntohl(csum ^ 0xFFFF);
3536                 skb->csum = csum;
3537                 skb->ip_summed = CHECKSUM_HW;
3538         }
3539         adapter->hw_csum_good++;
3540 }
3541
3542 /**
3543  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3544  * @adapter: board private structure
3545  **/
3546
3547 static boolean_t
3548 #ifdef CONFIG_E1000_NAPI
3549 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3550                    struct e1000_rx_ring *rx_ring,
3551                    int *work_done, int work_to_do)
3552 #else
3553 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3554                    struct e1000_rx_ring *rx_ring)
3555 #endif
3556 {
3557         struct net_device *netdev = adapter->netdev;
3558         struct pci_dev *pdev = adapter->pdev;
3559         struct e1000_rx_desc *rx_desc, *next_rxd;
3560         struct e1000_buffer *buffer_info, *next_buffer;
3561         unsigned long flags;
3562         uint32_t length;
3563         uint8_t last_byte;
3564         unsigned int i;
3565         int cleaned_count = 0;
3566         boolean_t cleaned = FALSE;
3567
3568         i = rx_ring->next_to_clean;
3569         rx_desc = E1000_RX_DESC(*rx_ring, i);
3570         buffer_info = &rx_ring->buffer_info[i];
3571
3572         while (rx_desc->status & E1000_RXD_STAT_DD) {
3573                 struct sk_buff *skb;
3574                 u8 status;
3575 #ifdef CONFIG_E1000_NAPI
3576                 if (*work_done >= work_to_do)
3577                         break;
3578                 (*work_done)++;
3579 #endif
3580                 status = rx_desc->status;
3581                 skb = buffer_info->skb;
3582                 buffer_info->skb = NULL;
3583
3584                 prefetch(skb->data - NET_IP_ALIGN);
3585
3586                 if (++i == rx_ring->count) i = 0;
3587                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3588                 prefetch(next_rxd);
3589
3590                 next_buffer = &rx_ring->buffer_info[i];
3591
3592                 cleaned = TRUE;
3593                 cleaned_count++;
3594                 pci_unmap_single(pdev,
3595                                  buffer_info->dma,
3596                                  buffer_info->length,
3597                                  PCI_DMA_FROMDEVICE);
3598
3599                 length = le16_to_cpu(rx_desc->length);
3600
3601                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3602                         /* All receives must fit into a single buffer */
3603                         E1000_DBG("%s: Receive packet consumed multiple"
3604                                   " buffers\n", netdev->name);
3605                         /* recycle */
3606                         buffer_info-> skb = skb;
3607                         goto next_desc;
3608                 }
3609
3610                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3611                         last_byte = *(skb->data + length - 1);
3612                         if (TBI_ACCEPT(&adapter->hw, status,
3613                                       rx_desc->errors, length, last_byte)) {
3614                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3615                                 e1000_tbi_adjust_stats(&adapter->hw,
3616                                                        &adapter->stats,
3617                                                        length, skb->data);
3618                                 spin_unlock_irqrestore(&adapter->stats_lock,
3619                                                        flags);
3620                                 length--;
3621                         } else {
3622                                 /* recycle */
3623                                 buffer_info->skb = skb;
3624                                 goto next_desc;
3625                         }
3626                 }
3627
3628                 /* code added for copybreak, this should improve
3629                  * performance for small packets with large amounts
3630                  * of reassembly being done in the stack */
3631 #define E1000_CB_LENGTH 256
3632                 if (length < E1000_CB_LENGTH) {
3633                         struct sk_buff *new_skb =
3634                             dev_alloc_skb(length + NET_IP_ALIGN);
3635                         if (new_skb) {
3636                                 skb_reserve(new_skb, NET_IP_ALIGN);
3637                                 new_skb->dev = netdev;
3638                                 memcpy(new_skb->data - NET_IP_ALIGN,
3639                                        skb->data - NET_IP_ALIGN,
3640                                        length + NET_IP_ALIGN);
3641                                 /* save the skb in buffer_info as good */
3642                                 buffer_info->skb = skb;
3643                                 skb = new_skb;
3644                                 skb_put(skb, length);
3645                         }
3646                 } else
3647                         skb_put(skb, length);
3648
3649                 /* end copybreak code */
3650
3651                 /* Receive Checksum Offload */
3652                 e1000_rx_checksum(adapter,
3653                                   (uint32_t)(status) |
3654                                   ((uint32_t)(rx_desc->errors) << 24),
3655                                   le16_to_cpu(rx_desc->csum), skb);
3656
3657                 skb->protocol = eth_type_trans(skb, netdev);
3658 #ifdef CONFIG_E1000_NAPI
3659                 if (unlikely(adapter->vlgrp &&
3660                             (status & E1000_RXD_STAT_VP))) {
3661                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3662                                                  le16_to_cpu(rx_desc->special) &
3663                                                  E1000_RXD_SPC_VLAN_MASK);
3664                 } else {
3665                         netif_receive_skb(skb);
3666                 }
3667 #else /* CONFIG_E1000_NAPI */
3668                 if (unlikely(adapter->vlgrp &&
3669                             (status & E1000_RXD_STAT_VP))) {
3670                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3671                                         le16_to_cpu(rx_desc->special) &
3672                                         E1000_RXD_SPC_VLAN_MASK);
3673                 } else {
3674                         netif_rx(skb);
3675                 }
3676 #endif /* CONFIG_E1000_NAPI */
3677                 netdev->last_rx = jiffies;
3678
3679 next_desc:
3680                 rx_desc->status = 0;
3681
3682                 /* return some buffers to hardware, one at a time is too slow */
3683                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3684                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3685                         cleaned_count = 0;
3686                 }
3687
3688                 /* use prefetched values */
3689                 rx_desc = next_rxd;
3690                 buffer_info = next_buffer;
3691         }
3692         rx_ring->next_to_clean = i;
3693
3694         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3695         if (cleaned_count)
3696                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3697
3698         return cleaned;
3699 }
3700
3701 /**
3702  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3703  * @adapter: board private structure
3704  **/
3705
3706 static boolean_t
3707 #ifdef CONFIG_E1000_NAPI
3708 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3709                       struct e1000_rx_ring *rx_ring,
3710                       int *work_done, int work_to_do)
3711 #else
3712 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3713                       struct e1000_rx_ring *rx_ring)
3714 #endif
3715 {
3716         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3717         struct net_device *netdev = adapter->netdev;
3718         struct pci_dev *pdev = adapter->pdev;
3719         struct e1000_buffer *buffer_info, *next_buffer;
3720         struct e1000_ps_page *ps_page;
3721         struct e1000_ps_page_dma *ps_page_dma;
3722         struct sk_buff *skb;
3723         unsigned int i, j;
3724         uint32_t length, staterr;
3725         int cleaned_count = 0;
3726         boolean_t cleaned = FALSE;
3727
3728         i = rx_ring->next_to_clean;
3729         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3730         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3731         buffer_info = &rx_ring->buffer_info[i];
3732
3733         while (staterr & E1000_RXD_STAT_DD) {
3734                 ps_page = &rx_ring->ps_page[i];
3735                 ps_page_dma = &rx_ring->ps_page_dma[i];
3736 #ifdef CONFIG_E1000_NAPI
3737                 if (unlikely(*work_done >= work_to_do))
3738                         break;
3739                 (*work_done)++;
3740 #endif
3741                 skb = buffer_info->skb;
3742
3743                 /* in the packet split case this is header only */
3744                 prefetch(skb->data - NET_IP_ALIGN);
3745
3746                 if (++i == rx_ring->count) i = 0;
3747                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3748                 prefetch(next_rxd);
3749
3750                 next_buffer = &rx_ring->buffer_info[i];
3751
3752                 cleaned = TRUE;
3753                 cleaned_count++;
3754                 pci_unmap_single(pdev, buffer_info->dma,
3755                                  buffer_info->length,
3756                                  PCI_DMA_FROMDEVICE);
3757
3758                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3759                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3760                                   " the full packet\n", netdev->name);
3761                         dev_kfree_skb_irq(skb);
3762                         goto next_desc;
3763                 }
3764
3765                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3766                         dev_kfree_skb_irq(skb);
3767                         goto next_desc;
3768                 }
3769
3770                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3771
3772                 if (unlikely(!length)) {
3773                         E1000_DBG("%s: Last part of the packet spanning"
3774                                   " multiple descriptors\n", netdev->name);
3775                         dev_kfree_skb_irq(skb);
3776                         goto next_desc;
3777                 }
3778
3779                 /* Good Receive */
3780                 skb_put(skb, length);
3781
3782                 {
3783                 /* this looks ugly, but it seems compiler issues make it
3784                    more efficient than reusing j */
3785                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3786
3787                 /* page alloc/put takes too long and effects small packet
3788                  * throughput, so unsplit small packets and save the alloc/put*/
3789                 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
3790                         u8 *vaddr;
3791                         /* there is no documentation about how to call
3792                          * kmap_atomic, so we can't hold the mapping
3793                          * very long */
3794                         pci_dma_sync_single_for_cpu(pdev,
3795                                 ps_page_dma->ps_page_dma[0],
3796                                 PAGE_SIZE,
3797                                 PCI_DMA_FROMDEVICE);
3798                         vaddr = kmap_atomic(ps_page->ps_page[0],
3799                                             KM_SKB_DATA_SOFTIRQ);
3800                         memcpy(skb->tail, vaddr, l1);
3801                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3802                         pci_dma_sync_single_for_device(pdev,
3803                                 ps_page_dma->ps_page_dma[0],
3804                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3805                         skb_put(skb, l1);
3806                         length += l1;
3807                         goto copydone;
3808                 } /* if */
3809                 }
3810
3811                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3812                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3813                                 break;
3814                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3815                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3816                         ps_page_dma->ps_page_dma[j] = 0;
3817                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3818                                            length);
3819                         ps_page->ps_page[j] = NULL;
3820                         skb->len += length;
3821                         skb->data_len += length;
3822                         skb->truesize += length;
3823                 }
3824
3825 copydone:
3826                 e1000_rx_checksum(adapter, staterr,
3827                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
3828                 skb->protocol = eth_type_trans(skb, netdev);
3829
3830                 if (likely(rx_desc->wb.upper.header_status &
3831                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
3832                         adapter->rx_hdr_split++;
3833 #ifdef CONFIG_E1000_NAPI
3834                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3835                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3836                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3837                                 E1000_RXD_SPC_VLAN_MASK);
3838                 } else {
3839                         netif_receive_skb(skb);
3840                 }
3841 #else /* CONFIG_E1000_NAPI */
3842                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3843                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3844                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3845                                 E1000_RXD_SPC_VLAN_MASK);
3846                 } else {
3847                         netif_rx(skb);
3848                 }
3849 #endif /* CONFIG_E1000_NAPI */
3850                 netdev->last_rx = jiffies;
3851
3852 next_desc:
3853                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
3854                 buffer_info->skb = NULL;
3855
3856                 /* return some buffers to hardware, one at a time is too slow */
3857                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3858                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3859                         cleaned_count = 0;
3860                 }
3861
3862                 /* use prefetched values */
3863                 rx_desc = next_rxd;
3864                 buffer_info = next_buffer;
3865
3866                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3867         }
3868         rx_ring->next_to_clean = i;
3869
3870         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3871         if (cleaned_count)
3872                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3873
3874         return cleaned;
3875 }
3876
3877 /**
3878  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3879  * @adapter: address of board private structure
3880  **/
3881
3882 static void
3883 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3884                        struct e1000_rx_ring *rx_ring,
3885                        int cleaned_count)
3886 {
3887         struct net_device *netdev = adapter->netdev;
3888         struct pci_dev *pdev = adapter->pdev;
3889         struct e1000_rx_desc *rx_desc;
3890         struct e1000_buffer *buffer_info;
3891         struct sk_buff *skb;
3892         unsigned int i;
3893         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3894
3895         i = rx_ring->next_to_use;
3896         buffer_info = &rx_ring->buffer_info[i];
3897
3898         while (cleaned_count--) {
3899                 if (!(skb = buffer_info->skb))
3900                         skb = dev_alloc_skb(bufsz);
3901                 else {
3902                         skb_trim(skb, 0);
3903                         goto map_skb;
3904                 }
3905
3906                 if (unlikely(!skb)) {
3907                         /* Better luck next round */
3908                         adapter->alloc_rx_buff_failed++;
3909                         break;
3910                 }
3911
3912                 /* Fix for errata 23, can't cross 64kB boundary */
3913                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3914                         struct sk_buff *oldskb = skb;
3915                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3916                                              "at %p\n", bufsz, skb->data);
3917                         /* Try again, without freeing the previous */
3918                         skb = dev_alloc_skb(bufsz);
3919                         /* Failed allocation, critical failure */
3920                         if (!skb) {
3921                                 dev_kfree_skb(oldskb);
3922                                 break;
3923                         }
3924
3925                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3926                                 /* give up */
3927                                 dev_kfree_skb(skb);
3928                                 dev_kfree_skb(oldskb);
3929                                 break; /* while !buffer_info->skb */
3930                         } else {
3931                                 /* Use new allocation */
3932                                 dev_kfree_skb(oldskb);
3933                         }
3934                 }
3935                 /* Make buffer alignment 2 beyond a 16 byte boundary
3936                  * this will result in a 16 byte aligned IP header after
3937                  * the 14 byte MAC header is removed
3938                  */
3939                 skb_reserve(skb, NET_IP_ALIGN);
3940
3941                 skb->dev = netdev;
3942
3943                 buffer_info->skb = skb;
3944                 buffer_info->length = adapter->rx_buffer_len;
3945 map_skb:
3946                 buffer_info->dma = pci_map_single(pdev,
3947                                                   skb->data,
3948                                                   adapter->rx_buffer_len,
3949                                                   PCI_DMA_FROMDEVICE);
3950
3951                 /* Fix for errata 23, can't cross 64kB boundary */
3952                 if (!e1000_check_64k_bound(adapter,
3953                                         (void *)(unsigned long)buffer_info->dma,
3954                                         adapter->rx_buffer_len)) {
3955                         DPRINTK(RX_ERR, ERR,
3956                                 "dma align check failed: %u bytes at %p\n",
3957                                 adapter->rx_buffer_len,
3958                                 (void *)(unsigned long)buffer_info->dma);
3959                         dev_kfree_skb(skb);
3960                         buffer_info->skb = NULL;
3961
3962                         pci_unmap_single(pdev, buffer_info->dma,
3963                                          adapter->rx_buffer_len,
3964                                          PCI_DMA_FROMDEVICE);
3965
3966                         break; /* while !buffer_info->skb */
3967                 }
3968                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3969                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3970
3971                 if (unlikely(++i == rx_ring->count))
3972                         i = 0;
3973                 buffer_info = &rx_ring->buffer_info[i];
3974         }
3975
3976         if (likely(rx_ring->next_to_use != i)) {
3977                 rx_ring->next_to_use = i;
3978                 if (unlikely(i-- == 0))
3979                         i = (rx_ring->count - 1);
3980
3981                 /* Force memory writes to complete before letting h/w
3982                  * know there are new descriptors to fetch.  (Only
3983                  * applicable for weak-ordered memory model archs,
3984                  * such as IA-64). */
3985                 wmb();
3986                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3987         }
3988 }
3989
3990 /**
3991  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3992  * @adapter: address of board private structure
3993  **/
3994
3995 static void
3996 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3997                           struct e1000_rx_ring *rx_ring,
3998                           int cleaned_count)
3999 {
4000         struct net_device *netdev = adapter->netdev;
4001         struct pci_dev *pdev = adapter->pdev;
4002         union e1000_rx_desc_packet_split *rx_desc;
4003         struct e1000_buffer *buffer_info;
4004         struct e1000_ps_page *ps_page;
4005         struct e1000_ps_page_dma *ps_page_dma;
4006         struct sk_buff *skb;
4007         unsigned int i, j;
4008
4009         i = rx_ring->next_to_use;
4010         buffer_info = &rx_ring->buffer_info[i];
4011         ps_page = &rx_ring->ps_page[i];
4012         ps_page_dma = &rx_ring->ps_page_dma[i];
4013
4014         while (cleaned_count--) {
4015                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4016
4017                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4018                         if (j < adapter->rx_ps_pages) {
4019                                 if (likely(!ps_page->ps_page[j])) {
4020                                         ps_page->ps_page[j] =
4021                                                 alloc_page(GFP_ATOMIC);
4022                                         if (unlikely(!ps_page->ps_page[j])) {
4023                                                 adapter->alloc_rx_buff_failed++;
4024                                                 goto no_buffers;
4025                                         }
4026                                         ps_page_dma->ps_page_dma[j] =
4027                                                 pci_map_page(pdev,
4028                                                             ps_page->ps_page[j],
4029                                                             0, PAGE_SIZE,
4030                                                             PCI_DMA_FROMDEVICE);
4031                                 }
4032                                 /* Refresh the desc even if buffer_addrs didn't
4033                                  * change because each write-back erases
4034                                  * this info.
4035                                  */
4036                                 rx_desc->read.buffer_addr[j+1] =
4037                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4038                         } else
4039                                 rx_desc->read.buffer_addr[j+1] = ~0;
4040                 }
4041
4042                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4043
4044                 if (unlikely(!skb)) {
4045                         adapter->alloc_rx_buff_failed++;
4046                         break;
4047                 }
4048
4049                 /* Make buffer alignment 2 beyond a 16 byte boundary
4050                  * this will result in a 16 byte aligned IP header after
4051                  * the 14 byte MAC header is removed
4052                  */
4053                 skb_reserve(skb, NET_IP_ALIGN);
4054
4055                 skb->dev = netdev;
4056
4057                 buffer_info->skb = skb;
4058                 buffer_info->length = adapter->rx_ps_bsize0;
4059                 buffer_info->dma = pci_map_single(pdev, skb->data,
4060                                                   adapter->rx_ps_bsize0,
4061                                                   PCI_DMA_FROMDEVICE);
4062
4063                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4064
4065                 if (unlikely(++i == rx_ring->count)) i = 0;
4066                 buffer_info = &rx_ring->buffer_info[i];
4067                 ps_page = &rx_ring->ps_page[i];
4068                 ps_page_dma = &rx_ring->ps_page_dma[i];
4069         }
4070
4071 no_buffers:
4072         if (likely(rx_ring->next_to_use != i)) {
4073                 rx_ring->next_to_use = i;
4074                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4075
4076                 /* Force memory writes to complete before letting h/w
4077                  * know there are new descriptors to fetch.  (Only
4078                  * applicable for weak-ordered memory model archs,
4079                  * such as IA-64). */
4080                 wmb();
4081                 /* Hardware increments by 16 bytes, but packet split
4082                  * descriptors are 32 bytes...so we increment tail
4083                  * twice as much.
4084                  */
4085                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4086         }
4087 }
4088
4089 /**
4090  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4091  * @adapter:
4092  **/
4093
4094 static void
4095 e1000_smartspeed(struct e1000_adapter *adapter)
4096 {
4097         uint16_t phy_status;
4098         uint16_t phy_ctrl;
4099
4100         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4101            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4102                 return;
4103
4104         if (adapter->smartspeed == 0) {
4105                 /* If Master/Slave config fault is asserted twice,
4106                  * we assume back-to-back */
4107                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4108                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4109                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4110                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4111                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4112                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4113                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4114                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4115                                             phy_ctrl);
4116                         adapter->smartspeed++;
4117                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4118                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4119                                                &phy_ctrl)) {
4120                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4121                                              MII_CR_RESTART_AUTO_NEG);
4122                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4123                                                     phy_ctrl);
4124                         }
4125                 }
4126                 return;
4127         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4128                 /* If still no link, perhaps using 2/3 pair cable */
4129                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4130                 phy_ctrl |= CR_1000T_MS_ENABLE;
4131                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4132                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4133                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4134                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4135                                      MII_CR_RESTART_AUTO_NEG);
4136                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4137                 }
4138         }
4139         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4140         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4141                 adapter->smartspeed = 0;
4142 }
4143
4144 /**
4145  * e1000_ioctl -
4146  * @netdev:
4147  * @ifreq:
4148  * @cmd:
4149  **/
4150
4151 static int
4152 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4153 {
4154         switch (cmd) {
4155         case SIOCGMIIPHY:
4156         case SIOCGMIIREG:
4157         case SIOCSMIIREG:
4158                 return e1000_mii_ioctl(netdev, ifr, cmd);
4159         default:
4160                 return -EOPNOTSUPP;
4161         }
4162 }
4163
4164 /**
4165  * e1000_mii_ioctl -
4166  * @netdev:
4167  * @ifreq:
4168  * @cmd:
4169  **/
4170
4171 static int
4172 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4173 {
4174         struct e1000_adapter *adapter = netdev_priv(netdev);
4175         struct mii_ioctl_data *data = if_mii(ifr);
4176         int retval;
4177         uint16_t mii_reg;
4178         uint16_t spddplx;
4179         unsigned long flags;
4180
4181         if (adapter->hw.media_type != e1000_media_type_copper)
4182                 return -EOPNOTSUPP;
4183
4184         switch (cmd) {
4185         case SIOCGMIIPHY:
4186                 data->phy_id = adapter->hw.phy_addr;
4187                 break;
4188         case SIOCGMIIREG:
4189                 if (!capable(CAP_NET_ADMIN))
4190                         return -EPERM;
4191                 spin_lock_irqsave(&adapter->stats_lock, flags);
4192                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4193                                    &data->val_out)) {
4194                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4195                         return -EIO;
4196                 }
4197                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4198                 break;
4199         case SIOCSMIIREG:
4200                 if (!capable(CAP_NET_ADMIN))
4201                         return -EPERM;
4202                 if (data->reg_num & ~(0x1F))
4203                         return -EFAULT;
4204                 mii_reg = data->val_in;
4205                 spin_lock_irqsave(&adapter->stats_lock, flags);
4206                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4207                                         mii_reg)) {
4208                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4209                         return -EIO;
4210                 }
4211                 if (adapter->hw.media_type == e1000_media_type_copper) {
4212                         switch (data->reg_num) {
4213                         case PHY_CTRL:
4214                                 if (mii_reg & MII_CR_POWER_DOWN)
4215                                         break;
4216                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4217                                         adapter->hw.autoneg = 1;
4218                                         adapter->hw.autoneg_advertised = 0x2F;
4219                                 } else {
4220                                         if (mii_reg & 0x40)
4221                                                 spddplx = SPEED_1000;
4222                                         else if (mii_reg & 0x2000)
4223                                                 spddplx = SPEED_100;
4224                                         else
4225                                                 spddplx = SPEED_10;
4226                                         spddplx += (mii_reg & 0x100)
4227                                                    ? DUPLEX_FULL :
4228                                                    DUPLEX_HALF;
4229                                         retval = e1000_set_spd_dplx(adapter,
4230                                                                     spddplx);
4231                                         if (retval) {
4232                                                 spin_unlock_irqrestore(
4233                                                         &adapter->stats_lock,
4234                                                         flags);
4235                                                 return retval;
4236                                         }
4237                                 }
4238                                 if (netif_running(adapter->netdev))
4239                                         e1000_reinit_locked(adapter);
4240                                 else
4241                                         e1000_reset(adapter);
4242                                 break;
4243                         case M88E1000_PHY_SPEC_CTRL:
4244                         case M88E1000_EXT_PHY_SPEC_CTRL:
4245                                 if (e1000_phy_reset(&adapter->hw)) {
4246                                         spin_unlock_irqrestore(
4247                                                 &adapter->stats_lock, flags);
4248                                         return -EIO;
4249                                 }
4250                                 break;
4251                         }
4252                 } else {
4253                         switch (data->reg_num) {
4254                         case PHY_CTRL:
4255                                 if (mii_reg & MII_CR_POWER_DOWN)
4256                                         break;
4257                                 if (netif_running(adapter->netdev))
4258                                         e1000_reinit_locked(adapter);
4259                                 else
4260                                         e1000_reset(adapter);
4261                                 break;
4262                         }
4263                 }
4264                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4265                 break;
4266         default:
4267                 return -EOPNOTSUPP;
4268         }
4269         return E1000_SUCCESS;
4270 }
4271
4272 void
4273 e1000_pci_set_mwi(struct e1000_hw *hw)
4274 {
4275         struct e1000_adapter *adapter = hw->back;
4276         int ret_val = pci_set_mwi(adapter->pdev);
4277
4278         if (ret_val)
4279                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4280 }
4281
4282 void
4283 e1000_pci_clear_mwi(struct e1000_hw *hw)
4284 {
4285         struct e1000_adapter *adapter = hw->back;
4286
4287         pci_clear_mwi(adapter->pdev);
4288 }
4289
4290 void
4291 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4292 {
4293         struct e1000_adapter *adapter = hw->back;
4294
4295         pci_read_config_word(adapter->pdev, reg, value);
4296 }
4297
4298 void
4299 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4300 {
4301         struct e1000_adapter *adapter = hw->back;
4302
4303         pci_write_config_word(adapter->pdev, reg, *value);
4304 }
4305
4306 uint32_t
4307 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4308 {
4309         return inl(port);
4310 }
4311
4312 void
4313 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4314 {
4315         outl(value, port);
4316 }
4317
4318 static void
4319 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4320 {
4321         struct e1000_adapter *adapter = netdev_priv(netdev);
4322         uint32_t ctrl, rctl;
4323
4324         e1000_irq_disable(adapter);
4325         adapter->vlgrp = grp;
4326
4327         if (grp) {
4328                 /* enable VLAN tag insert/strip */
4329                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4330                 ctrl |= E1000_CTRL_VME;
4331                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4332
4333                 /* enable VLAN receive filtering */
4334                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4335                 rctl |= E1000_RCTL_VFE;
4336                 rctl &= ~E1000_RCTL_CFIEN;
4337                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4338                 e1000_update_mng_vlan(adapter);
4339         } else {
4340                 /* disable VLAN tag insert/strip */
4341                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4342                 ctrl &= ~E1000_CTRL_VME;
4343                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4344
4345                 /* disable VLAN filtering */
4346                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4347                 rctl &= ~E1000_RCTL_VFE;
4348                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4349                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4350                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4351                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4352                 }
4353         }
4354
4355         e1000_irq_enable(adapter);
4356 }
4357
4358 static void
4359 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4360 {
4361         struct e1000_adapter *adapter = netdev_priv(netdev);
4362         uint32_t vfta, index;
4363
4364         if ((adapter->hw.mng_cookie.status &
4365              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4366             (vid == adapter->mng_vlan_id))
4367                 return;
4368         /* add VID to filter table */
4369         index = (vid >> 5) & 0x7F;
4370         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4371         vfta |= (1 << (vid & 0x1F));
4372         e1000_write_vfta(&adapter->hw, index, vfta);
4373 }
4374
4375 static void
4376 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4377 {
4378         struct e1000_adapter *adapter = netdev_priv(netdev);
4379         uint32_t vfta, index;
4380
4381         e1000_irq_disable(adapter);
4382
4383         if (adapter->vlgrp)
4384                 adapter->vlgrp->vlan_devices[vid] = NULL;
4385
4386         e1000_irq_enable(adapter);
4387
4388         if ((adapter->hw.mng_cookie.status &
4389              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4390             (vid == adapter->mng_vlan_id)) {
4391                 /* release control to f/w */
4392                 e1000_release_hw_control(adapter);
4393                 return;
4394         }
4395
4396         /* remove VID from filter table */
4397         index = (vid >> 5) & 0x7F;
4398         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4399         vfta &= ~(1 << (vid & 0x1F));
4400         e1000_write_vfta(&adapter->hw, index, vfta);
4401 }
4402
4403 static void
4404 e1000_restore_vlan(struct e1000_adapter *adapter)
4405 {
4406         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4407
4408         if (adapter->vlgrp) {
4409                 uint16_t vid;
4410                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4411                         if (!adapter->vlgrp->vlan_devices[vid])
4412                                 continue;
4413                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4414                 }
4415         }
4416 }
4417
4418 int
4419 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4420 {
4421         adapter->hw.autoneg = 0;
4422
4423         /* Fiber NICs only allow 1000 gbps Full duplex */
4424         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4425                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4426                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4427                 return -EINVAL;
4428         }
4429
4430         switch (spddplx) {
4431         case SPEED_10 + DUPLEX_HALF:
4432                 adapter->hw.forced_speed_duplex = e1000_10_half;
4433                 break;
4434         case SPEED_10 + DUPLEX_FULL:
4435                 adapter->hw.forced_speed_duplex = e1000_10_full;
4436                 break;
4437         case SPEED_100 + DUPLEX_HALF:
4438                 adapter->hw.forced_speed_duplex = e1000_100_half;
4439                 break;
4440         case SPEED_100 + DUPLEX_FULL:
4441                 adapter->hw.forced_speed_duplex = e1000_100_full;
4442                 break;
4443         case SPEED_1000 + DUPLEX_FULL:
4444                 adapter->hw.autoneg = 1;
4445                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4446                 break;
4447         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4448         default:
4449                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4450                 return -EINVAL;
4451         }
4452         return 0;
4453 }
4454
4455 #ifdef CONFIG_PM
4456 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4457  * bus we're on (PCI(X) vs. PCI-E)
4458  */
4459 #define PCIE_CONFIG_SPACE_LEN 256
4460 #define PCI_CONFIG_SPACE_LEN 64
4461 static int
4462 e1000_pci_save_state(struct e1000_adapter *adapter)
4463 {
4464         struct pci_dev *dev = adapter->pdev;
4465         int size;
4466         int i;
4467
4468         if (adapter->hw.mac_type >= e1000_82571)
4469                 size = PCIE_CONFIG_SPACE_LEN;
4470         else
4471                 size = PCI_CONFIG_SPACE_LEN;
4472
4473         WARN_ON(adapter->config_space != NULL);
4474
4475         adapter->config_space = kmalloc(size, GFP_KERNEL);
4476         if (!adapter->config_space) {
4477                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4478                 return -ENOMEM;
4479         }
4480         for (i = 0; i < (size / 4); i++)
4481                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4482         return 0;
4483 }
4484
4485 static void
4486 e1000_pci_restore_state(struct e1000_adapter *adapter)
4487 {
4488         struct pci_dev *dev = adapter->pdev;
4489         int size;
4490         int i;
4491
4492         if (adapter->config_space == NULL)
4493                 return;
4494
4495         if (adapter->hw.mac_type >= e1000_82571)
4496                 size = PCIE_CONFIG_SPACE_LEN;
4497         else
4498                 size = PCI_CONFIG_SPACE_LEN;
4499         for (i = 0; i < (size / 4); i++)
4500                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4501         kfree(adapter->config_space);
4502         adapter->config_space = NULL;
4503         return;
4504 }
4505 #endif /* CONFIG_PM */
4506
4507 static int
4508 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4509 {
4510         struct net_device *netdev = pci_get_drvdata(pdev);
4511         struct e1000_adapter *adapter = netdev_priv(netdev);
4512         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4513         uint32_t wufc = adapter->wol;
4514 #ifdef CONFIG_PM
4515         int retval = 0;
4516 #endif
4517
4518         netif_device_detach(netdev);
4519
4520         if (netif_running(netdev)) {
4521                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4522                 e1000_down(adapter);
4523         }
4524
4525 #ifdef CONFIG_PM
4526         /* Implement our own version of pci_save_state(pdev) because pci-
4527          * express adapters have 256-byte config spaces. */
4528         retval = e1000_pci_save_state(adapter);
4529         if (retval)
4530                 return retval;
4531 #endif
4532
4533         status = E1000_READ_REG(&adapter->hw, STATUS);
4534         if (status & E1000_STATUS_LU)
4535                 wufc &= ~E1000_WUFC_LNKC;
4536
4537         if (wufc) {
4538                 e1000_setup_rctl(adapter);
4539                 e1000_set_multi(netdev);
4540
4541                 /* turn on all-multi mode if wake on multicast is enabled */
4542                 if (adapter->wol & E1000_WUFC_MC) {
4543                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4544                         rctl |= E1000_RCTL_MPE;
4545                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4546                 }
4547
4548                 if (adapter->hw.mac_type >= e1000_82540) {
4549                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4550                         /* advertise wake from D3Cold */
4551                         #define E1000_CTRL_ADVD3WUC 0x00100000
4552                         /* phy power management enable */
4553                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4554                         ctrl |= E1000_CTRL_ADVD3WUC |
4555                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4556                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4557                 }
4558
4559                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4560                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4561                         /* keep the laser running in D3 */
4562                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4563                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4564                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4565                 }
4566
4567                 /* Allow time for pending master requests to run */
4568                 e1000_disable_pciex_master(&adapter->hw);
4569
4570                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4571                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4572                 pci_enable_wake(pdev, PCI_D3hot, 1);
4573                 pci_enable_wake(pdev, PCI_D3cold, 1);
4574         } else {
4575                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4576                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4577                 pci_enable_wake(pdev, PCI_D3hot, 0);
4578                 pci_enable_wake(pdev, PCI_D3cold, 0);
4579         }
4580
4581         if (adapter->hw.mac_type >= e1000_82540 &&
4582            adapter->hw.media_type == e1000_media_type_copper) {
4583                 manc = E1000_READ_REG(&adapter->hw, MANC);
4584                 if (manc & E1000_MANC_SMBUS_EN) {
4585                         manc |= E1000_MANC_ARP_EN;
4586                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4587                         pci_enable_wake(pdev, PCI_D3hot, 1);
4588                         pci_enable_wake(pdev, PCI_D3cold, 1);
4589                 }
4590         }
4591
4592         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4593          * would have already happened in close and is redundant. */
4594         e1000_release_hw_control(adapter);
4595
4596         pci_disable_device(pdev);
4597
4598         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4599
4600         return 0;
4601 }
4602
4603 #ifdef CONFIG_PM
4604 static int
4605 e1000_resume(struct pci_dev *pdev)
4606 {
4607         struct net_device *netdev = pci_get_drvdata(pdev);
4608         struct e1000_adapter *adapter = netdev_priv(netdev);
4609         uint32_t manc, ret_val;
4610
4611         pci_set_power_state(pdev, PCI_D0);
4612         e1000_pci_restore_state(adapter);
4613         ret_val = pci_enable_device(pdev);
4614         pci_set_master(pdev);
4615
4616         pci_enable_wake(pdev, PCI_D3hot, 0);
4617         pci_enable_wake(pdev, PCI_D3cold, 0);
4618
4619         e1000_reset(adapter);
4620         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4621
4622         if (netif_running(netdev))
4623                 e1000_up(adapter);
4624
4625         netif_device_attach(netdev);
4626
4627         if (adapter->hw.mac_type >= e1000_82540 &&
4628            adapter->hw.media_type == e1000_media_type_copper) {
4629                 manc = E1000_READ_REG(&adapter->hw, MANC);
4630                 manc &= ~(E1000_MANC_ARP_EN);
4631                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4632         }
4633
4634         /* If the controller is 82573 and f/w is AMT, do not set
4635          * DRV_LOAD until the interface is up.  For all other cases,
4636          * let the f/w know that the h/w is now under the control
4637          * of the driver. */
4638         if (adapter->hw.mac_type != e1000_82573 ||
4639             !e1000_check_mng_mode(&adapter->hw))
4640                 e1000_get_hw_control(adapter);
4641
4642         return 0;
4643 }
4644 #endif
4645
4646 static void e1000_shutdown(struct pci_dev *pdev)
4647 {
4648         e1000_suspend(pdev, PMSG_SUSPEND);
4649 }
4650
4651 #ifdef CONFIG_NET_POLL_CONTROLLER
4652 /*
4653  * Polling 'interrupt' - used by things like netconsole to send skbs
4654  * without having to re-enable interrupts. It's not called while
4655  * the interrupt routine is executing.
4656  */
4657 static void
4658 e1000_netpoll(struct net_device *netdev)
4659 {
4660         struct e1000_adapter *adapter = netdev_priv(netdev);
4661         disable_irq(adapter->pdev->irq);
4662         e1000_intr(adapter->pdev->irq, netdev, NULL);
4663         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4664 #ifndef CONFIG_E1000_NAPI
4665         adapter->clean_rx(adapter, adapter->rx_ring);
4666 #endif
4667         enable_irq(adapter->pdev->irq);
4668 }
4669 #endif
4670
4671 /**
4672  * e1000_io_error_detected - called when PCI error is detected
4673  * @pdev: Pointer to PCI device
4674  * @state: The current pci conneection state
4675  *
4676  * This function is called after a PCI bus error affecting
4677  * this device has been detected.
4678  */
4679 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
4680 {
4681         struct net_device *netdev = pci_get_drvdata(pdev);
4682         struct e1000_adapter *adapter = netdev->priv;
4683
4684         netif_device_detach(netdev);
4685
4686         if (netif_running(netdev))
4687                 e1000_down(adapter);
4688
4689         /* Request a slot slot reset. */
4690         return PCI_ERS_RESULT_NEED_RESET;
4691 }
4692
4693 /**
4694  * e1000_io_slot_reset - called after the pci bus has been reset.
4695  * @pdev: Pointer to PCI device
4696  *
4697  * Restart the card from scratch, as if from a cold-boot. Implementation
4698  * resembles the first-half of the e1000_resume routine.
4699  */
4700 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4701 {
4702         struct net_device *netdev = pci_get_drvdata(pdev);
4703         struct e1000_adapter *adapter = netdev->priv;
4704
4705         if (pci_enable_device(pdev)) {
4706                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4707                 return PCI_ERS_RESULT_DISCONNECT;
4708         }
4709         pci_set_master(pdev);
4710
4711         pci_enable_wake(pdev, 3, 0);
4712         pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4713
4714         /* Perform card reset only on one instance of the card */
4715         if (PCI_FUNC (pdev->devfn) != 0)
4716                 return PCI_ERS_RESULT_RECOVERED;
4717
4718         e1000_reset(adapter);
4719         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4720
4721         return PCI_ERS_RESULT_RECOVERED;
4722 }
4723
4724 /**
4725  * e1000_io_resume - called when traffic can start flowing again.
4726  * @pdev: Pointer to PCI device
4727  *
4728  * This callback is called when the error recovery driver tells us that
4729  * its OK to resume normal operation. Implementation resembles the
4730  * second-half of the e1000_resume routine.
4731  */
4732 static void e1000_io_resume(struct pci_dev *pdev)
4733 {
4734         struct net_device *netdev = pci_get_drvdata(pdev);
4735         struct e1000_adapter *adapter = netdev->priv;
4736         uint32_t manc, swsm;
4737
4738         if (netif_running(netdev)) {
4739                 if (e1000_up(adapter)) {
4740                         printk("e1000: can't bring device back up after reset\n");
4741                         return;
4742                 }
4743         }
4744
4745         netif_device_attach(netdev);
4746
4747         if (adapter->hw.mac_type >= e1000_82540 &&
4748             adapter->hw.media_type == e1000_media_type_copper) {
4749                 manc = E1000_READ_REG(&adapter->hw, MANC);
4750                 manc &= ~(E1000_MANC_ARP_EN);
4751                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4752         }
4753
4754         switch (adapter->hw.mac_type) {
4755         case e1000_82573:
4756                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4757                 E1000_WRITE_REG(&adapter->hw, SWSM,
4758                                 swsm | E1000_SWSM_DRV_LOAD);
4759                 break;
4760         default:
4761                 break;
4762         }
4763
4764         if (netif_running(netdev))
4765                 mod_timer(&adapter->watchdog_timer, jiffies);
4766 }
4767
4768 /* e1000_main.c */