drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  * 7.0.33      3-Feb-2006
  33  *   o Added another fix for the pass false carrier bit
  34  * 7.0.32      24-Jan-2006
  35  *   o Need to rebuild with noew version number for the pass false carrier
  36  *     fix in e1000_hw.c
  37  * 7.0.30      18-Jan-2006
  38  *   o fixup for tso workaround to disable it for pci-x
  39  *   o fix mem leak on 82542
  40  *   o fixes for 10 Mb/s connections and incorrect stats
  41  * 7.0.28      01/06/2006
  42  *   o hardware workaround to only set "speed mode" bit for 1G link.
  43  * 7.0.26      12/23/2005
  44  *   o wake on lan support modified for device ID 10B5
  45  *   o fix dhcp + vlan issue not making it to the iAMT firmware
  46  * 7.0.24      12/9/2005
  47  *   o New hardware support for the Gigabit NIC embedded in the south bridge
  48  *   o Fixes to the recycling logic (skb->tail) from IBM LTC
  49  * 6.3.9        12/16/2005
  50  *   o incorporate fix for recycled skbs from IBM LTC
  51  * 6.3.7        11/18/2005
  52  *   o Honor eeprom setting for enabling/disabling Wake On Lan
  53  * 6.3.5        11/17/2005
  54  *   o Fix memory leak in rx ring handling for PCI Express adapters
  55  * 6.3.4        11/8/05
  56  *   o Patch from Jesper Juhl to remove redundant NULL checks for kfree
  57  * 6.3.2        9/20/05
  58  *   o Render logic that sets/resets DRV_LOAD as inline functions to
  59  *     avoid code replication. If f/w is AMT then set DRV_LOAD only when
  60  *     network interface is open.
  61  *   o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
  62  *   o Adjust PBA partioning for Jumbo frames using MTU size and not
  63  *     rx_buffer_len
  64  * 6.3.1        9/19/05
  65  *   o Use adapter->tx_timeout_factor in Tx Hung Detect logic
  66  *      (e1000_clean_tx_irq)
  67  *   o Support for 8086:10B5 device (Quad Port)
  68  */
  69
  70 char e1000_driver_name[] = "e1000";
  71 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  72 #ifndef CONFIG_E1000_NAPI
  73 #define DRIVERNAPI
  74 #else
  75 #define DRIVERNAPI "-NAPI"
  76 #endif
  77 #define DRV_VERSION "7.0.33-k2"DRIVERNAPI
  78 char e1000_driver_version[] = DRV_VERSION;
  79 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
  80
  81 /* e1000_pci_tbl - PCI Device ID Table
  82  *
  83  * Last entry must be all 0s
  84  *
  85  * Macro expands to...
  86  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  87  */
  88 static struct pci_device_id e1000_pci_tbl[] = {
  89         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  91         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  94         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  95         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  96         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  97         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  99         INTEL_E1000_ETHERNET_DEVICE(0x1011),
 100         INTEL_E1000_ETHERNET_DEVICE(0x1012),
 101         INTEL_E1000_ETHERNET_DEVICE(0x1013),
 102         INTEL_E1000_ETHERNET_DEVICE(0x1014),
 103         INTEL_E1000_ETHERNET_DEVICE(0x1015),
 104         INTEL_E1000_ETHERNET_DEVICE(0x1016),
 105         INTEL_E1000_ETHERNET_DEVICE(0x1017),
 106         INTEL_E1000_ETHERNET_DEVICE(0x1018),
 107         INTEL_E1000_ETHERNET_DEVICE(0x1019),
 108         INTEL_E1000_ETHERNET_DEVICE(0x101A),
 109         INTEL_E1000_ETHERNET_DEVICE(0x101D),
 110         INTEL_E1000_ETHERNET_DEVICE(0x101E),
 111         INTEL_E1000_ETHERNET_DEVICE(0x1026),
 112         INTEL_E1000_ETHERNET_DEVICE(0x1027),
 113         INTEL_E1000_ETHERNET_DEVICE(0x1028),
 114         INTEL_E1000_ETHERNET_DEVICE(0x105E),
 115         INTEL_E1000_ETHERNET_DEVICE(0x105F),
 116         INTEL_E1000_ETHERNET_DEVICE(0x1060),
 117         INTEL_E1000_ETHERNET_DEVICE(0x1075),
 118         INTEL_E1000_ETHERNET_DEVICE(0x1076),
 119         INTEL_E1000_ETHERNET_DEVICE(0x1077),
 120         INTEL_E1000_ETHERNET_DEVICE(0x1078),
 121         INTEL_E1000_ETHERNET_DEVICE(0x1079),
 122         INTEL_E1000_ETHERNET_DEVICE(0x107A),
 123         INTEL_E1000_ETHERNET_DEVICE(0x107B),
 124         INTEL_E1000_ETHERNET_DEVICE(0x107C),
 125         INTEL_E1000_ETHERNET_DEVICE(0x107D),
 126         INTEL_E1000_ETHERNET_DEVICE(0x107E),
 127         INTEL_E1000_ETHERNET_DEVICE(0x107F),
 128         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 129         INTEL_E1000_ETHERNET_DEVICE(0x108B),
 130         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 131         INTEL_E1000_ETHERNET_DEVICE(0x1096),
 132         INTEL_E1000_ETHERNET_DEVICE(0x1098),
 133         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 134         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 135         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 136         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 137         /* required last entry */
 138         {0,}
 139 };
 140
 141 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 142
 143 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 144                                     struct e1000_tx_ring *txdr);
 145 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 146                                     struct e1000_rx_ring *rxdr);
 147 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 148                                     struct e1000_tx_ring *tx_ring);
 149 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 150                                     struct e1000_rx_ring *rx_ring);
 151
 152 /* Local Function Prototypes */
 153
 154 static int e1000_init_module(void);
 155 static void e1000_exit_module(void);
 156 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 157 static void __devexit e1000_remove(struct pci_dev *pdev);
 158 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 159 static int e1000_sw_init(struct e1000_adapter *adapter);
 160 static int e1000_open(struct net_device *netdev);
 161 static int e1000_close(struct net_device *netdev);
 162 static void e1000_configure_tx(struct e1000_adapter *adapter);
 163 static void e1000_configure_rx(struct e1000_adapter *adapter);
 164 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 165 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 166 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 167 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 168                                 struct e1000_tx_ring *tx_ring);
 169 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 170                                 struct e1000_rx_ring *rx_ring);
 171 static void e1000_set_multi(struct net_device *netdev);
 172 static void e1000_update_phy_info(unsigned long data);
 173 static void e1000_watchdog(unsigned long data);
 174 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 175 static void e1000_82547_tx_fifo_stall(unsigned long data);
 176 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 177 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 178 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 179 static int e1000_set_mac(struct net_device *netdev, void *p);
 180 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 181 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 182                                     struct e1000_tx_ring *tx_ring);
 183 #ifdef CONFIG_E1000_NAPI
 184 static int e1000_clean(struct net_device *poll_dev, int *budget);
 185 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 186                                     struct e1000_rx_ring *rx_ring,
 187                                     int *work_done, int work_to_do);
 188 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 189                                        struct e1000_rx_ring *rx_ring,
 190                                        int *work_done, int work_to_do);
 191 #else
 192 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 193                                     struct e1000_rx_ring *rx_ring);
 194 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 195                                        struct e1000_rx_ring *rx_ring);
 196 #endif
 197 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 198                                    struct e1000_rx_ring *rx_ring,
 199                                    int cleaned_count);
 200 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 201                                       struct e1000_rx_ring *rx_ring,
 202                                       int cleaned_count);
 203 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 204 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 205                            int cmd);
 206 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 207 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 208 static void e1000_tx_timeout(struct net_device *dev);
 209 static void e1000_reset_task(struct net_device *dev);
 210 static void e1000_smartspeed(struct e1000_adapter *adapter);
 211 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 212                                               struct sk_buff *skb);
 213
 214 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 215 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 216 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 217 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 218
 219 #ifdef CONFIG_PM
 220 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 221 static int e1000_resume(struct pci_dev *pdev);
 222 #endif
 223
 224 #ifdef CONFIG_NET_POLL_CONTROLLER
 225 /* for netdump / net console */
 226 static void e1000_netpoll (struct net_device *netdev);
 227 #endif
 228
 229
 230 static struct pci_driver e1000_driver = {
 231         .name     = e1000_driver_name,
 232         .id_table = e1000_pci_tbl,
 233         .probe    = e1000_probe,
 234         .remove   = __devexit_p(e1000_remove),
 235         /* Power Managment Hooks */
 236 #ifdef CONFIG_PM
 237         .suspend  = e1000_suspend,
 238         .resume   = e1000_resume
 239 #endif
 240 };
 241
 242 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 243 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 244 MODULE_LICENSE("GPL");
 245 MODULE_VERSION(DRV_VERSION);
 246
 247 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 248 module_param(debug, int, 0);
 249 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 250
 251 /**
 252  * e1000_init_module - Driver Registration Routine
 253  *
 254  * e1000_init_module is the first routine called when the driver is
 255  * loaded. All it does is register with the PCI subsystem.
 256  **/
 257
 258 static int __init
 259 e1000_init_module(void)
 260 {
 261         int ret;
 262         printk(KERN_INFO "%s - version %s\n",
 263                e1000_driver_string, e1000_driver_version);
 264
 265         printk(KERN_INFO "%s\n", e1000_copyright);
 266
 267         ret = pci_module_init(&e1000_driver);
 268
 269         return ret;
 270 }
 271
 272 module_init(e1000_init_module);
 273
 274 /**
 275  * e1000_exit_module - Driver Exit Cleanup Routine
 276  *
 277  * e1000_exit_module is called just before the driver is removed
 278  * from memory.
 279  **/
 280
 281 static void __exit
 282 e1000_exit_module(void)
 283 {
 284         pci_unregister_driver(&e1000_driver);
 285 }
 286
 287 module_exit(e1000_exit_module);
 288
 289 /**
 290  * e1000_irq_disable - Mask off interrupt generation on the NIC
 291  * @adapter: board private structure
 292  **/
 293
 294 static inline void
 295 e1000_irq_disable(struct e1000_adapter *adapter)
 296 {
 297         atomic_inc(&adapter->irq_sem);
 298         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 299         E1000_WRITE_FLUSH(&adapter->hw);
 300         synchronize_irq(adapter->pdev->irq);
 301 }
 302
 303 /**
 304  * e1000_irq_enable - Enable default interrupt generation settings
 305  * @adapter: board private structure
 306  **/
 307
 308 static inline void
 309 e1000_irq_enable(struct e1000_adapter *adapter)
 310 {
 311         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 312                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 313                 E1000_WRITE_FLUSH(&adapter->hw);
 314         }
 315 }
 316
 317 static void
 318 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 319 {
 320         struct net_device *netdev = adapter->netdev;
 321         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 322         uint16_t old_vid = adapter->mng_vlan_id;
 323         if (adapter->vlgrp) {
 324                 if (!adapter->vlgrp->vlan_devices[vid]) {
 325                         if (adapter->hw.mng_cookie.status &
 326                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 327                                 e1000_vlan_rx_add_vid(netdev, vid);
 328                                 adapter->mng_vlan_id = vid;
 329                         } else
 330                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 331
 332                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 333                                         (vid != old_vid) &&
 334                                         !adapter->vlgrp->vlan_devices[old_vid])
 335                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 336                 } else
 337                         adapter->mng_vlan_id = vid;
 338         }
 339 }
 340
 341 /**
 342  * e1000_release_hw_control - release control of the h/w to f/w
 343  * @adapter: address of board private structure
 344  *
 345  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 346  * For ASF and Pass Through versions of f/w this means that the
 347  * driver is no longer loaded. For AMT version (only with 82573) i
 348  * of the f/w this means that the netowrk i/f is closed.
 349  *
 350  **/
 351
 352 static inline void
 353 e1000_release_hw_control(struct e1000_adapter *adapter)
 354 {
 355         uint32_t ctrl_ext;
 356         uint32_t swsm;
 357
 358         /* Let firmware taken over control of h/w */
 359         switch (adapter->hw.mac_type) {
 360         case e1000_82571:
 361         case e1000_82572:
 362                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 363                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 364                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 365                 break;
 366         case e1000_82573:
 367                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 368                 E1000_WRITE_REG(&adapter->hw, SWSM,
 369                                 swsm & ~E1000_SWSM_DRV_LOAD);
 370         default:
 371                 break;
 372         }
 373 }
 374
 375 /**
 376  * e1000_get_hw_control - get control of the h/w from f/w
 377  * @adapter: address of board private structure
 378  *
 379  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 380  * For ASF and Pass Through versions of f/w this means that
 381  * the driver is loaded. For AMT version (only with 82573)
 382  * of the f/w this means that the netowrk i/f is open.
 383  *
 384  **/
 385
 386 static inline void
 387 e1000_get_hw_control(struct e1000_adapter *adapter)
 388 {
 389         uint32_t ctrl_ext;
 390         uint32_t swsm;
 391         /* Let firmware know the driver has taken over */
 392         switch (adapter->hw.mac_type) {
 393         case e1000_82571:
 394         case e1000_82572:
 395                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 396                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 397                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 398                 break;
 399         case e1000_82573:
 400                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 401                 E1000_WRITE_REG(&adapter->hw, SWSM,
 402                                 swsm | E1000_SWSM_DRV_LOAD);
 403                 break;
 404         default:
 405                 break;
 406         }
 407 }
 408
 409 int
 410 e1000_up(struct e1000_adapter *adapter)
 411 {
 412         struct net_device *netdev = adapter->netdev;
 413         int i, err;
 414
 415         /* hardware has been reset, we need to reload some things */
 416
 417         /* Reset the PHY if it was previously powered down */
 418         if (adapter->hw.media_type == e1000_media_type_copper) {
 419                 uint16_t mii_reg;
 420                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 421                 if (mii_reg & MII_CR_POWER_DOWN)
 422                         e1000_phy_reset(&adapter->hw);
 423         }
 424
 425         e1000_set_multi(netdev);
 426
 427         e1000_restore_vlan(adapter);
 428
 429         e1000_configure_tx(adapter);
 430         e1000_setup_rctl(adapter);
 431         e1000_configure_rx(adapter);
 432         /* call E1000_DESC_UNUSED which always leaves
 433          * at least 1 descriptor unused to make sure
 434          * next_to_use != next_to_clean */
 435         for (i = 0; i < adapter->num_rx_queues; i++) {
 436                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 437                 adapter->alloc_rx_buf(adapter, ring,
 438                                       E1000_DESC_UNUSED(ring));
 439         }
 440
 441 #ifdef CONFIG_PCI_MSI
 442         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 443                 adapter->have_msi = TRUE;
 444                 if ((err = pci_enable_msi(adapter->pdev))) {
 445                         DPRINTK(PROBE, ERR,
 446                          "Unable to allocate MSI interrupt Error: %d\n", err);
 447                         adapter->have_msi = FALSE;
 448                 }
 449         }
 450 #endif
 451         if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
 452                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 453                               netdev->name, netdev))) {
 454                 DPRINTK(PROBE, ERR,
 455                     "Unable to allocate interrupt Error: %d\n", err);
 456                 return err;
 457         }
 458
 459         adapter->tx_queue_len = netdev->tx_queue_len;
 460
 461         mod_timer(&adapter->watchdog_timer, jiffies);
 462
 463 #ifdef CONFIG_E1000_NAPI
 464         netif_poll_enable(netdev);
 465 #endif
 466         e1000_irq_enable(adapter);
 467
 468         return 0;
 469 }
 470
 471 void
 472 e1000_down(struct e1000_adapter *adapter)
 473 {
 474         struct net_device *netdev = adapter->netdev;
 475         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 476                                      e1000_check_mng_mode(&adapter->hw);
 477
 478         e1000_irq_disable(adapter);
 479
 480         free_irq(adapter->pdev->irq, netdev);
 481 #ifdef CONFIG_PCI_MSI
 482         if (adapter->hw.mac_type > e1000_82547_rev_2 &&
 483            adapter->have_msi == TRUE)
 484                 pci_disable_msi(adapter->pdev);
 485 #endif
 486         del_timer_sync(&adapter->tx_fifo_stall_timer);
 487         del_timer_sync(&adapter->watchdog_timer);
 488         del_timer_sync(&adapter->phy_info_timer);
 489
 490 #ifdef CONFIG_E1000_NAPI
 491         netif_poll_disable(netdev);
 492 #endif
 493         netdev->tx_queue_len = adapter->tx_queue_len;
 494         adapter->link_speed = 0;
 495         adapter->link_duplex = 0;
 496         netif_carrier_off(netdev);
 497         netif_stop_queue(netdev);
 498
 499         e1000_reset(adapter);
 500         e1000_clean_all_tx_rings(adapter);
 501         e1000_clean_all_rx_rings(adapter);
 502
 503         /* Power down the PHY so no link is implied when interface is down *
 504          * The PHY cannot be powered down if any of the following is TRUE *
 505          * (a) WoL is enabled
 506          * (b) AMT is active
 507          * (c) SoL/IDER session is active */
 508         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 509            adapter->hw.media_type == e1000_media_type_copper &&
 510            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 511            !mng_mode_enabled &&
 512            !e1000_check_phy_reset_block(&adapter->hw)) {
 513                 uint16_t mii_reg;
 514                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 515                 mii_reg |= MII_CR_POWER_DOWN;
 516                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 517                 mdelay(1);
 518         }
 519 }
 520
 521 void
 522 e1000_reset(struct e1000_adapter *adapter)
 523 {
 524         uint32_t pba, manc;
 525         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 526
 527         /* Repartition Pba for greater than 9k mtu
 528          * To take effect CTRL.RST is required.
 529          */
 530
 531         switch (adapter->hw.mac_type) {
 532         case e1000_82547:
 533         case e1000_82547_rev_2:
 534                 pba = E1000_PBA_30K;
 535                 break;
 536         case e1000_82571:
 537         case e1000_82572:
 538         case e1000_80003es2lan:
 539                 pba = E1000_PBA_38K;
 540                 break;
 541         case e1000_82573:
 542                 pba = E1000_PBA_12K;
 543                 break;
 544         default:
 545                 pba = E1000_PBA_48K;
 546                 break;
 547         }
 548
 549         if ((adapter->hw.mac_type != e1000_82573) &&
 550            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 551                 pba -= 8; /* allocate more FIFO for Tx */
 552
 553
 554         if (adapter->hw.mac_type == e1000_82547) {
 555                 adapter->tx_fifo_head = 0;
 556                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 557                 adapter->tx_fifo_size =
 558                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 559                 atomic_set(&adapter->tx_fifo_stall, 0);
 560         }
 561
 562         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 563
 564         /* flow control settings */
 565         /* Set the FC high water mark to 90% of the FIFO size.
 566          * Required to clear last 3 LSB */
 567         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 568
 569         adapter->hw.fc_high_water = fc_high_water_mark;
 570         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 571         if (adapter->hw.mac_type == e1000_80003es2lan)
 572                 adapter->hw.fc_pause_time = 0xFFFF;
 573         else
 574                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 575         adapter->hw.fc_send_xon = 1;
 576         adapter->hw.fc = adapter->hw.original_fc;
 577
 578         /* Allow time for pending master requests to run */
 579         e1000_reset_hw(&adapter->hw);
 580         if (adapter->hw.mac_type >= e1000_82544)
 581                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 582         if (e1000_init_hw(&adapter->hw))
 583                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 584         e1000_update_mng_vlan(adapter);
 585         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 586         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 587
 588         e1000_reset_adaptive(&adapter->hw);
 589         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 590         if (adapter->en_mng_pt) {
 591                 manc = E1000_READ_REG(&adapter->hw, MANC);
 592                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 593                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 594         }
 595 }
 596
 597 /**
 598  * e1000_probe - Device Initialization Routine
 599  * @pdev: PCI device information struct
 600  * @ent: entry in e1000_pci_tbl
 601  *
 602  * Returns 0 on success, negative on failure
 603  *
 604  * e1000_probe initializes an adapter identified by a pci_dev structure.
 605  * The OS initialization, configuring of the adapter private structure,
 606  * and a hardware reset occur.
 607  **/
 608
 609 static int __devinit
 610 e1000_probe(struct pci_dev *pdev,
 611             const struct pci_device_id *ent)
 612 {
 613         struct net_device *netdev;
 614         struct e1000_adapter *adapter;
 615         unsigned long mmio_start, mmio_len;
 616
 617         static int cards_found = 0;
 618         static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
 619         int i, err, pci_using_dac;
 620         uint16_t eeprom_data;
 621         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 622         if ((err = pci_enable_device(pdev)))
 623                 return err;
 624
 625         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 626                 pci_using_dac = 1;
 627         } else {
 628                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 629                         E1000_ERR("No usable DMA configuration, aborting\n");
 630                         return err;
 631                 }
 632                 pci_using_dac = 0;
 633         }
 634
 635         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 636                 return err;
 637
 638         pci_set_master(pdev);
 639
 640         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 641         if (!netdev) {
 642                 err = -ENOMEM;
 643                 goto err_alloc_etherdev;
 644         }
 645
 646         SET_MODULE_OWNER(netdev);
 647         SET_NETDEV_DEV(netdev, &pdev->dev);
 648
 649         pci_set_drvdata(pdev, netdev);
 650         adapter = netdev_priv(netdev);
 651         adapter->netdev = netdev;
 652         adapter->pdev = pdev;
 653         adapter->hw.back = adapter;
 654         adapter->msg_enable = (1 << debug) - 1;
 655
 656         mmio_start = pci_resource_start(pdev, BAR_0);
 657         mmio_len = pci_resource_len(pdev, BAR_0);
 658
 659         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 660         if (!adapter->hw.hw_addr) {
 661                 err = -EIO;
 662                 goto err_ioremap;
 663         }
 664
 665         for (i = BAR_1; i <= BAR_5; i++) {
 666                 if (pci_resource_len(pdev, i) == 0)
 667                         continue;
 668                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 669                         adapter->hw.io_base = pci_resource_start(pdev, i);
 670                         break;
 671                 }
 672         }
 673
 674         netdev->open = &e1000_open;
 675         netdev->stop = &e1000_close;
 676         netdev->hard_start_xmit = &e1000_xmit_frame;
 677         netdev->get_stats = &e1000_get_stats;
 678         netdev->set_multicast_list = &e1000_set_multi;
 679         netdev->set_mac_address = &e1000_set_mac;
 680         netdev->change_mtu = &e1000_change_mtu;
 681         netdev->do_ioctl = &e1000_ioctl;
 682         e1000_set_ethtool_ops(netdev);
 683         netdev->tx_timeout = &e1000_tx_timeout;
 684         netdev->watchdog_timeo = 5 * HZ;
 685 #ifdef CONFIG_E1000_NAPI
 686         netdev->poll = &e1000_clean;
 687         netdev->weight = 64;
 688 #endif
 689         netdev->vlan_rx_register = e1000_vlan_rx_register;
 690         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 691         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 692 #ifdef CONFIG_NET_POLL_CONTROLLER
 693         netdev->poll_controller = e1000_netpoll;
 694 #endif
 695         strcpy(netdev->name, pci_name(pdev));
 696
 697         netdev->mem_start = mmio_start;
 698         netdev->mem_end = mmio_start + mmio_len;
 699         netdev->base_addr = adapter->hw.io_base;
 700
 701         adapter->bd_number = cards_found;
 702
 703         /* setup the private structure */
 704
 705         if ((err = e1000_sw_init(adapter)))
 706                 goto err_sw_init;
 707
 708         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 709                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 710
 711         /* if ksp3, indicate if it's port a being setup */
 712         if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
 713                         e1000_ksp3_port_a == 0)
 714                 adapter->ksp3_port_a = 1;
 715         e1000_ksp3_port_a++;
 716         /* Reset for multiple KP3 adapters */
 717         if (e1000_ksp3_port_a == 4)
 718                 e1000_ksp3_port_a = 0;
 719
 720         if (adapter->hw.mac_type >= e1000_82543) {
 721                 netdev->features = NETIF_F_SG |
 722                                    NETIF_F_HW_CSUM |
 723                                    NETIF_F_HW_VLAN_TX |
 724                                    NETIF_F_HW_VLAN_RX |
 725                                    NETIF_F_HW_VLAN_FILTER;
 726         }
 727
 728 #ifdef NETIF_F_TSO
 729         if ((adapter->hw.mac_type >= e1000_82544) &&
 730            (adapter->hw.mac_type != e1000_82547))
 731                 netdev->features |= NETIF_F_TSO;
 732
 733 #ifdef NETIF_F_TSO_IPV6
 734         if (adapter->hw.mac_type > e1000_82547_rev_2)
 735                 netdev->features |= NETIF_F_TSO_IPV6;
 736 #endif
 737 #endif
 738         if (pci_using_dac)
 739                 netdev->features |= NETIF_F_HIGHDMA;
 740
 741         /* hard_start_xmit is safe against parallel locking */
 742         netdev->features |= NETIF_F_LLTX;
 743
 744         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 745
 746         /* before reading the EEPROM, reset the controller to
 747          * put the device in a known good starting state */
 748
 749         e1000_reset_hw(&adapter->hw);
 750
 751         /* make sure the EEPROM is good */
 752
 753         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 754                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 755                 err = -EIO;
 756                 goto err_eeprom;
 757         }
 758
 759         /* copy the MAC address out of the EEPROM */
 760
 761         if (e1000_read_mac_addr(&adapter->hw))
 762                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 763         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 764         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 765
 766         if (!is_valid_ether_addr(netdev->perm_addr)) {
 767                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 768                 err = -EIO;
 769                 goto err_eeprom;
 770         }
 771
 772         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 773
 774         e1000_get_bus_info(&adapter->hw);
 775
 776         init_timer(&adapter->tx_fifo_stall_timer);
 777         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 778         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 779
 780         init_timer(&adapter->watchdog_timer);
 781         adapter->watchdog_timer.function = &e1000_watchdog;
 782         adapter->watchdog_timer.data = (unsigned long) adapter;
 783
 784         INIT_WORK(&adapter->watchdog_task,
 785                 (void (*)(void *))e1000_watchdog_task, adapter);
 786
 787         init_timer(&adapter->phy_info_timer);
 788         adapter->phy_info_timer.function = &e1000_update_phy_info;
 789         adapter->phy_info_timer.data = (unsigned long) adapter;
 790
 791         INIT_WORK(&adapter->reset_task,
 792                 (void (*)(void *))e1000_reset_task, netdev);
 793
 794         /* we're going to reset, so assume we have no link for now */
 795
 796         netif_carrier_off(netdev);
 797         netif_stop_queue(netdev);
 798
 799         e1000_check_options(adapter);
 800
 801         /* Initial Wake on LAN setting
 802          * If APM wake is enabled in the EEPROM,
 803          * enable the ACPI Magic Packet filter
 804          */
 805
 806         switch (adapter->hw.mac_type) {
 807         case e1000_82542_rev2_0:
 808         case e1000_82542_rev2_1:
 809         case e1000_82543:
 810                 break;
 811         case e1000_82544:
 812                 e1000_read_eeprom(&adapter->hw,
 813                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 814                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 815                 break;
 816         case e1000_82546:
 817         case e1000_82546_rev_3:
 818         case e1000_82571:
 819         case e1000_80003es2lan:
 820                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 821                         e1000_read_eeprom(&adapter->hw,
 822                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 823                         break;
 824                 }
 825                 /* Fall Through */
 826         default:
 827                 e1000_read_eeprom(&adapter->hw,
 828                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 829                 break;
 830         }
 831         if (eeprom_data & eeprom_apme_mask)
 832                 adapter->wol |= E1000_WUFC_MAG;
 833
 834         /* print bus type/speed/width info */
 835         {
 836         struct e1000_hw *hw = &adapter->hw;
 837         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 838                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 839                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 840                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 841                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 842                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 843                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 844                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 845                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 846                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 847                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 848                  "32-bit"));
 849         }
 850
 851         for (i = 0; i < 6; i++)
 852                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 853
 854         /* reset the hardware with the new settings */
 855         e1000_reset(adapter);
 856
 857         /* If the controller is 82573 and f/w is AMT, do not set
 858          * DRV_LOAD until the interface is up.  For all other cases,
 859          * let the f/w know that the h/w is now under the control
 860          * of the driver. */
 861         if (adapter->hw.mac_type != e1000_82573 ||
 862             !e1000_check_mng_mode(&adapter->hw))
 863                 e1000_get_hw_control(adapter);
 864
 865         strcpy(netdev->name, "eth%d");
 866         if ((err = register_netdev(netdev)))
 867                 goto err_register;
 868
 869         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 870
 871         cards_found++;
 872         return 0;
 873
 874 err_register:
 875 err_sw_init:
 876 err_eeprom:
 877         iounmap(adapter->hw.hw_addr);
 878 err_ioremap:
 879         free_netdev(netdev);
 880 err_alloc_etherdev:
 881         pci_release_regions(pdev);
 882         return err;
 883 }
 884
 885 /**
 886  * e1000_remove - Device Removal Routine
 887  * @pdev: PCI device information struct
 888  *
 889  * e1000_remove is called by the PCI subsystem to alert the driver
 890  * that it should release a PCI device.  The could be caused by a
 891  * Hot-Plug event, or because the driver is going to be removed from
 892  * memory.
 893  **/
 894
 895 static void __devexit
 896 e1000_remove(struct pci_dev *pdev)
 897 {
 898         struct net_device *netdev = pci_get_drvdata(pdev);
 899         struct e1000_adapter *adapter = netdev_priv(netdev);
 900         uint32_t manc;
 901 #ifdef CONFIG_E1000_NAPI
 902         int i;
 903 #endif
 904
 905         flush_scheduled_work();
 906
 907         if (adapter->hw.mac_type >= e1000_82540 &&
 908            adapter->hw.media_type == e1000_media_type_copper) {
 909                 manc = E1000_READ_REG(&adapter->hw, MANC);
 910                 if (manc & E1000_MANC_SMBUS_EN) {
 911                         manc |= E1000_MANC_ARP_EN;
 912                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 913                 }
 914         }
 915
 916         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 917          * would have already happened in close and is redundant. */
 918         e1000_release_hw_control(adapter);
 919
 920         unregister_netdev(netdev);
 921 #ifdef CONFIG_E1000_NAPI
 922         for (i = 0; i < adapter->num_rx_queues; i++)
 923                 __dev_put(&adapter->polling_netdev[i]);
 924 #endif
 925
 926         if (!e1000_check_phy_reset_block(&adapter->hw))
 927                 e1000_phy_hw_reset(&adapter->hw);
 928
 929         kfree(adapter->tx_ring);
 930         kfree(adapter->rx_ring);
 931 #ifdef CONFIG_E1000_NAPI
 932         kfree(adapter->polling_netdev);
 933 #endif
 934
 935         iounmap(adapter->hw.hw_addr);
 936         pci_release_regions(pdev);
 937
 938         free_netdev(netdev);
 939
 940         pci_disable_device(pdev);
 941 }
 942
 943 /**
 944  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 945  * @adapter: board private structure to initialize
 946  *
 947  * e1000_sw_init initializes the Adapter private data structure.
 948  * Fields are initialized based on PCI device information and
 949  * OS network device settings (MTU size).
 950  **/
 951
 952 static int __devinit
 953 e1000_sw_init(struct e1000_adapter *adapter)
 954 {
 955         struct e1000_hw *hw = &adapter->hw;
 956         struct net_device *netdev = adapter->netdev;
 957         struct pci_dev *pdev = adapter->pdev;
 958 #ifdef CONFIG_E1000_NAPI
 959         int i;
 960 #endif
 961
 962         /* PCI config space info */
 963
 964         hw->vendor_id = pdev->vendor;
 965         hw->device_id = pdev->device;
 966         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 967         hw->subsystem_id = pdev->subsystem_device;
 968
 969         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 970
 971         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 972
 973         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 974         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 975         hw->max_frame_size = netdev->mtu +
 976                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 977         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 978
 979         /* identify the MAC */
 980
 981         if (e1000_set_mac_type(hw)) {
 982                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 983                 return -EIO;
 984         }
 985
 986         /* initialize eeprom parameters */
 987
 988         if (e1000_init_eeprom_params(hw)) {
 989                 E1000_ERR("EEPROM initialization failed\n");
 990                 return -EIO;
 991         }
 992
 993         switch (hw->mac_type) {
 994         default:
 995                 break;
 996         case e1000_82541:
 997         case e1000_82547:
 998         case e1000_82541_rev_2:
 999         case e1000_82547_rev_2:
1000                 hw->phy_init_script = 1;
1001                 break;
1002         }
1003
1004         e1000_set_media_type(hw);
1005
1006         hw->wait_autoneg_complete = FALSE;
1007         hw->tbi_compatibility_en = TRUE;
1008         hw->adaptive_ifs = TRUE;
1009
1010         /* Copper options */
1011
1012         if (hw->media_type == e1000_media_type_copper) {
1013                 hw->mdix = AUTO_ALL_MODES;
1014                 hw->disable_polarity_correction = FALSE;
1015                 hw->master_slave = E1000_MASTER_SLAVE;
1016         }
1017
1018         adapter->num_tx_queues = 1;
1019         adapter->num_rx_queues = 1;
1020
1021         if (e1000_alloc_queues(adapter)) {
1022                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1023                 return -ENOMEM;
1024         }
1025
1026 #ifdef CONFIG_E1000_NAPI
1027         for (i = 0; i < adapter->num_rx_queues; i++) {
1028                 adapter->polling_netdev[i].priv = adapter;
1029                 adapter->polling_netdev[i].poll = &e1000_clean;
1030                 adapter->polling_netdev[i].weight = 64;
1031                 dev_hold(&adapter->polling_netdev[i]);
1032                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1033         }
1034         spin_lock_init(&adapter->tx_queue_lock);
1035 #endif
1036
1037         atomic_set(&adapter->irq_sem, 1);
1038         spin_lock_init(&adapter->stats_lock);
1039
1040         return 0;
1041 }
1042
1043 /**
1044  * e1000_alloc_queues - Allocate memory for all rings
1045  * @adapter: board private structure to initialize
1046  *
1047  * We allocate one ring per queue at run-time since we don't know the
1048  * number of queues at compile-time.  The polling_netdev array is
1049  * intended for Multiqueue, but should work fine with a single queue.
1050  **/
1051
1052 static int __devinit
1053 e1000_alloc_queues(struct e1000_adapter *adapter)
1054 {
1055         int size;
1056
1057         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1058         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1059         if (!adapter->tx_ring)
1060                 return -ENOMEM;
1061         memset(adapter->tx_ring, 0, size);
1062
1063         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1064         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1065         if (!adapter->rx_ring) {
1066                 kfree(adapter->tx_ring);
1067                 return -ENOMEM;
1068         }
1069         memset(adapter->rx_ring, 0, size);
1070
1071 #ifdef CONFIG_E1000_NAPI
1072         size = sizeof(struct net_device) * adapter->num_rx_queues;
1073         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1074         if (!adapter->polling_netdev) {
1075                 kfree(adapter->tx_ring);
1076                 kfree(adapter->rx_ring);
1077                 return -ENOMEM;
1078         }
1079         memset(adapter->polling_netdev, 0, size);
1080 #endif
1081
1082         return E1000_SUCCESS;
1083 }
1084
1085 /**
1086  * e1000_open - Called when a network interface is made active
1087  * @netdev: network interface device structure
1088  *
1089  * Returns 0 on success, negative value on failure
1090  *
1091  * The open entry point is called when a network interface is made
1092  * active by the system (IFF_UP).  At this point all resources needed
1093  * for transmit and receive operations are allocated, the interrupt
1094  * handler is registered with the OS, the watchdog timer is started,
1095  * and the stack is notified that the interface is ready.
1096  **/
1097
1098 static int
1099 e1000_open(struct net_device *netdev)
1100 {
1101         struct e1000_adapter *adapter = netdev_priv(netdev);
1102         int err;
1103
1104         /* allocate transmit descriptors */
1105
1106         if ((err = e1000_setup_all_tx_resources(adapter)))
1107                 goto err_setup_tx;
1108
1109         /* allocate receive descriptors */
1110
1111         if ((err = e1000_setup_all_rx_resources(adapter)))
1112                 goto err_setup_rx;
1113
1114         if ((err = e1000_up(adapter)))
1115                 goto err_up;
1116         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1117         if ((adapter->hw.mng_cookie.status &
1118                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1119                 e1000_update_mng_vlan(adapter);
1120         }
1121
1122         /* If AMT is enabled, let the firmware know that the network
1123          * interface is now open */
1124         if (adapter->hw.mac_type == e1000_82573 &&
1125             e1000_check_mng_mode(&adapter->hw))
1126                 e1000_get_hw_control(adapter);
1127
1128         return E1000_SUCCESS;
1129
1130 err_up:
1131         e1000_free_all_rx_resources(adapter);
1132 err_setup_rx:
1133         e1000_free_all_tx_resources(adapter);
1134 err_setup_tx:
1135         e1000_reset(adapter);
1136
1137         return err;
1138 }
1139
1140 /**
1141  * e1000_close - Disables a network interface
1142  * @netdev: network interface device structure
1143  *
1144  * Returns 0, this is not allowed to fail
1145  *
1146  * The close entry point is called when an interface is de-activated
1147  * by the OS.  The hardware is still under the drivers control, but
1148  * needs to be disabled.  A global MAC reset is issued to stop the
1149  * hardware, and all transmit and receive resources are freed.
1150  **/
1151
1152 static int
1153 e1000_close(struct net_device *netdev)
1154 {
1155         struct e1000_adapter *adapter = netdev_priv(netdev);
1156
1157         e1000_down(adapter);
1158
1159         e1000_free_all_tx_resources(adapter);
1160         e1000_free_all_rx_resources(adapter);
1161
1162         if ((adapter->hw.mng_cookie.status &
1163                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1164                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1165         }
1166
1167         /* If AMT is enabled, let the firmware know that the network
1168          * interface is now closed */
1169         if (adapter->hw.mac_type == e1000_82573 &&
1170             e1000_check_mng_mode(&adapter->hw))
1171                 e1000_release_hw_control(adapter);
1172
1173         return 0;
1174 }
1175
1176 /**
1177  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1178  * @adapter: address of board private structure
1179  * @start: address of beginning of memory
1180  * @len: length of memory
1181  **/
1182 static inline boolean_t
1183 e1000_check_64k_bound(struct e1000_adapter *adapter,
1184                       void *start, unsigned long len)
1185 {
1186         unsigned long begin = (unsigned long) start;
1187         unsigned long end = begin + len;
1188
1189         /* First rev 82545 and 82546 need to not allow any memory
1190          * write location to cross 64k boundary due to errata 23 */
1191         if (adapter->hw.mac_type == e1000_82545 ||
1192             adapter->hw.mac_type == e1000_82546) {
1193                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1194         }
1195
1196         return TRUE;
1197 }
1198
1199 /**
1200  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1201  * @adapter: board private structure
1202  * @txdr:    tx descriptor ring (for a specific queue) to setup
1203  *
1204  * Return 0 on success, negative on failure
1205  **/
1206
1207 static int
1208 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1209                          struct e1000_tx_ring *txdr)
1210 {
1211         struct pci_dev *pdev = adapter->pdev;
1212         int size;
1213
1214         size = sizeof(struct e1000_buffer) * txdr->count;
1215
1216         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1217         if (!txdr->buffer_info) {
1218                 DPRINTK(PROBE, ERR,
1219                 "Unable to allocate memory for the transmit descriptor ring\n");
1220                 return -ENOMEM;
1221         }
1222         memset(txdr->buffer_info, 0, size);
1223
1224         /* round up to nearest 4K */
1225
1226         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1227         E1000_ROUNDUP(txdr->size, 4096);
1228
1229         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1230         if (!txdr->desc) {
1231 setup_tx_desc_die:
1232                 vfree(txdr->buffer_info);
1233                 DPRINTK(PROBE, ERR,
1234                 "Unable to allocate memory for the transmit descriptor ring\n");
1235                 return -ENOMEM;
1236         }
1237
1238         /* Fix for errata 23, can't cross 64kB boundary */
1239         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1240                 void *olddesc = txdr->desc;
1241                 dma_addr_t olddma = txdr->dma;
1242                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1243                                      "at %p\n", txdr->size, txdr->desc);
1244                 /* Try again, without freeing the previous */
1245                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1246                 /* Failed allocation, critical failure */
1247                 if (!txdr->desc) {
1248                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1249                         goto setup_tx_desc_die;
1250                 }
1251
1252                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1253                         /* give up */
1254                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1255                                             txdr->dma);
1256                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1257                         DPRINTK(PROBE, ERR,
1258                                 "Unable to allocate aligned memory "
1259                                 "for the transmit descriptor ring\n");
1260                         vfree(txdr->buffer_info);
1261                         return -ENOMEM;
1262                 } else {
1263                         /* Free old allocation, new allocation was successful */
1264                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1265                 }
1266         }
1267         memset(txdr->desc, 0, txdr->size);
1268
1269         txdr->next_to_use = 0;
1270         txdr->next_to_clean = 0;
1271         spin_lock_init(&txdr->tx_lock);
1272
1273         return 0;
1274 }
1275
1276 /**
1277  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1278  *                                (Descriptors) for all queues
1279  * @adapter: board private structure
1280  *
1281  * If this function returns with an error, then it's possible one or
1282  * more of the rings is populated (while the rest are not).  It is the
1283  * callers duty to clean those orphaned rings.
1284  *
1285  * Return 0 on success, negative on failure
1286  **/
1287
1288 int
1289 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1290 {
1291         int i, err = 0;
1292
1293         for (i = 0; i < adapter->num_tx_queues; i++) {
1294                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1295                 if (err) {
1296                         DPRINTK(PROBE, ERR,
1297                                 "Allocation for Tx Queue %u failed\n", i);
1298                         break;
1299                 }
1300         }
1301
1302         return err;
1303 }
1304
1305 /**
1306  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1307  * @adapter: board private structure
1308  *
1309  * Configure the Tx unit of the MAC after a reset.
1310  **/
1311
1312 static void
1313 e1000_configure_tx(struct e1000_adapter *adapter)
1314 {
1315         uint64_t tdba;
1316         struct e1000_hw *hw = &adapter->hw;
1317         uint32_t tdlen, tctl, tipg, tarc;
1318         uint32_t ipgr1, ipgr2;
1319
1320         /* Setup the HW Tx Head and Tail descriptor pointers */
1321
1322         switch (adapter->num_tx_queues) {
1323         case 1:
1324         default:
1325                 tdba = adapter->tx_ring[0].dma;
1326                 tdlen = adapter->tx_ring[0].count *
1327                         sizeof(struct e1000_tx_desc);
1328                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1329                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1330                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1331                 E1000_WRITE_REG(hw, TDH, 0);
1332                 E1000_WRITE_REG(hw, TDT, 0);
1333                 adapter->tx_ring[0].tdh = E1000_TDH;
1334                 adapter->tx_ring[0].tdt = E1000_TDT;
1335                 break;
1336         }
1337
1338         /* Set the default values for the Tx Inter Packet Gap timer */
1339
1340         if (hw->media_type == e1000_media_type_fiber ||
1341             hw->media_type == e1000_media_type_internal_serdes)
1342                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1343         else
1344                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1345
1346         switch (hw->mac_type) {
1347         case e1000_82542_rev2_0:
1348         case e1000_82542_rev2_1:
1349                 tipg = DEFAULT_82542_TIPG_IPGT;
1350                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1351                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1352                 break;
1353         case e1000_80003es2lan:
1354                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1355                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1356                 break;
1357         default:
1358                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1359                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1360                 break;
1361         }
1362         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1363         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1364         E1000_WRITE_REG(hw, TIPG, tipg);
1365
1366         /* Set the Tx Interrupt Delay register */
1367
1368         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1369         if (hw->mac_type >= e1000_82540)
1370                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1371
1372         /* Program the Transmit Control Register */
1373
1374         tctl = E1000_READ_REG(hw, TCTL);
1375
1376         tctl &= ~E1000_TCTL_CT;
1377         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1378                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1379
1380 #ifdef DISABLE_MULR
1381         /* disable Multiple Reads for debugging */
1382         tctl &= ~E1000_TCTL_MULR;
1383 #endif
1384
1385         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1386                 tarc = E1000_READ_REG(hw, TARC0);
1387                 tarc |= ((1 << 25) | (1 << 21));
1388                 E1000_WRITE_REG(hw, TARC0, tarc);
1389                 tarc = E1000_READ_REG(hw, TARC1);
1390                 tarc |= (1 << 25);
1391                 if (tctl & E1000_TCTL_MULR)
1392                         tarc &= ~(1 << 28);
1393                 else
1394                         tarc |= (1 << 28);
1395                 E1000_WRITE_REG(hw, TARC1, tarc);
1396         } else if (hw->mac_type == e1000_80003es2lan) {
1397                 tarc = E1000_READ_REG(hw, TARC0);
1398                 tarc |= 1;
1399                 if (hw->media_type == e1000_media_type_internal_serdes)
1400                         tarc |= (1 << 20);
1401                 E1000_WRITE_REG(hw, TARC0, tarc);
1402                 tarc = E1000_READ_REG(hw, TARC1);
1403                 tarc |= 1;
1404                 E1000_WRITE_REG(hw, TARC1, tarc);
1405         }
1406
1407         e1000_config_collision_dist(hw);
1408
1409         /* Setup Transmit Descriptor Settings for eop descriptor */
1410         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1411                 E1000_TXD_CMD_IFCS;
1412
1413         if (hw->mac_type < e1000_82543)
1414                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1415         else
1416                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1417
1418         /* Cache if we're 82544 running in PCI-X because we'll
1419          * need this to apply a workaround later in the send path. */
1420         if (hw->mac_type == e1000_82544 &&
1421             hw->bus_type == e1000_bus_type_pcix)
1422                 adapter->pcix_82544 = 1;
1423
1424         E1000_WRITE_REG(hw, TCTL, tctl);
1425
1426 }
1427
1428 /**
1429  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1430  * @adapter: board private structure
1431  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1432  *
1433  * Returns 0 on success, negative on failure
1434  **/
1435
1436 static int
1437 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1438                          struct e1000_rx_ring *rxdr)
1439 {
1440         struct pci_dev *pdev = adapter->pdev;
1441         int size, desc_len;
1442
1443         size = sizeof(struct e1000_buffer) * rxdr->count;
1444         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1445         if (!rxdr->buffer_info) {
1446                 DPRINTK(PROBE, ERR,
1447                 "Unable to allocate memory for the receive descriptor ring\n");
1448                 return -ENOMEM;
1449         }
1450         memset(rxdr->buffer_info, 0, size);
1451
1452         size = sizeof(struct e1000_ps_page) * rxdr->count;
1453         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1454         if (!rxdr->ps_page) {
1455                 vfree(rxdr->buffer_info);
1456                 DPRINTK(PROBE, ERR,
1457                 "Unable to allocate memory for the receive descriptor ring\n");
1458                 return -ENOMEM;
1459         }
1460         memset(rxdr->ps_page, 0, size);
1461
1462         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1463         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1464         if (!rxdr->ps_page_dma) {
1465                 vfree(rxdr->buffer_info);
1466                 kfree(rxdr->ps_page);
1467                 DPRINTK(PROBE, ERR,
1468                 "Unable to allocate memory for the receive descriptor ring\n");
1469                 return -ENOMEM;
1470         }
1471         memset(rxdr->ps_page_dma, 0, size);
1472
1473         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1474                 desc_len = sizeof(struct e1000_rx_desc);
1475         else
1476                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1477
1478         /* Round up to nearest 4K */
1479
1480         rxdr->size = rxdr->count * desc_len;
1481         E1000_ROUNDUP(rxdr->size, 4096);
1482
1483         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1484
1485         if (!rxdr->desc) {
1486                 DPRINTK(PROBE, ERR,
1487                 "Unable to allocate memory for the receive descriptor ring\n");
1488 setup_rx_desc_die:
1489                 vfree(rxdr->buffer_info);
1490                 kfree(rxdr->ps_page);
1491                 kfree(rxdr->ps_page_dma);
1492                 return -ENOMEM;
1493         }
1494
1495         /* Fix for errata 23, can't cross 64kB boundary */
1496         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1497                 void *olddesc = rxdr->desc;
1498                 dma_addr_t olddma = rxdr->dma;
1499                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1500                                      "at %p\n", rxdr->size, rxdr->desc);
1501                 /* Try again, without freeing the previous */
1502                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1503                 /* Failed allocation, critical failure */
1504                 if (!rxdr->desc) {
1505                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1506                         DPRINTK(PROBE, ERR,
1507                                 "Unable to allocate memory "
1508                                 "for the receive descriptor ring\n");
1509                         goto setup_rx_desc_die;
1510                 }
1511
1512                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1513                         /* give up */
1514                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1515                                             rxdr->dma);
1516                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1517                         DPRINTK(PROBE, ERR,
1518                                 "Unable to allocate aligned memory "
1519                                 "for the receive descriptor ring\n");
1520                         goto setup_rx_desc_die;
1521                 } else {
1522                         /* Free old allocation, new allocation was successful */
1523                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1524                 }
1525         }
1526         memset(rxdr->desc, 0, rxdr->size);
1527
1528         rxdr->next_to_clean = 0;
1529         rxdr->next_to_use = 0;
1530
1531         return 0;
1532 }
1533
1534 /**
1535  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1536  *                                (Descriptors) for all queues
1537  * @adapter: board private structure
1538  *
1539  * If this function returns with an error, then it's possible one or
1540  * more of the rings is populated (while the rest are not).  It is the
1541  * callers duty to clean those orphaned rings.
1542  *
1543  * Return 0 on success, negative on failure
1544  **/
1545
1546 int
1547 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1548 {
1549         int i, err = 0;
1550
1551         for (i = 0; i < adapter->num_rx_queues; i++) {
1552                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1553                 if (err) {
1554                         DPRINTK(PROBE, ERR,
1555                                 "Allocation for Rx Queue %u failed\n", i);
1556                         break;
1557                 }
1558         }
1559
1560         return err;
1561 }
1562
1563 /**
1564  * e1000_setup_rctl - configure the receive control registers
1565  * @adapter: Board private structure
1566  **/
1567 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1568                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1569 static void
1570 e1000_setup_rctl(struct e1000_adapter *adapter)
1571 {
1572         uint32_t rctl, rfctl;
1573         uint32_t psrctl = 0;
1574 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1575         uint32_t pages = 0;
1576 #endif
1577
1578         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1579
1580         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1581
1582         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1583                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1584                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1585
1586         if (adapter->hw.mac_type > e1000_82543)
1587                 rctl |= E1000_RCTL_SECRC;
1588
1589         if (adapter->hw.tbi_compatibility_on == 1)
1590                 rctl |= E1000_RCTL_SBP;
1591         else
1592                 rctl &= ~E1000_RCTL_SBP;
1593
1594         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1595                 rctl &= ~E1000_RCTL_LPE;
1596         else
1597                 rctl |= E1000_RCTL_LPE;
1598
1599         /* Setup buffer sizes */
1600         if (adapter->hw.mac_type >= e1000_82571) {
1601                 /* We can now specify buffers in 1K increments.
1602                  * BSIZE and BSEX are ignored in this case. */
1603                 rctl |= adapter->rx_buffer_len << 0x11;
1604         } else {
1605                 rctl &= ~E1000_RCTL_SZ_4096;
1606                 rctl |= E1000_RCTL_BSEX;
1607                 switch (adapter->rx_buffer_len) {
1608                 case E1000_RXBUFFER_2048:
1609                 default:
1610                         rctl |= E1000_RCTL_SZ_2048;
1611                         rctl &= ~E1000_RCTL_BSEX;
1612                         break;
1613                 case E1000_RXBUFFER_4096:
1614                         rctl |= E1000_RCTL_SZ_4096;
1615                         break;
1616                 case E1000_RXBUFFER_8192:
1617                         rctl |= E1000_RCTL_SZ_8192;
1618                         break;
1619                 case E1000_RXBUFFER_16384:
1620                         rctl |= E1000_RCTL_SZ_16384;
1621                         break;
1622                 }
1623         }
1624
1625 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1626         /* 82571 and greater support packet-split where the protocol
1627          * header is placed in skb->data and the packet data is
1628          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1629          * In the case of a non-split, skb->data is linearly filled,
1630          * followed by the page buffers.  Therefore, skb->data is
1631          * sized to hold the largest protocol header.
1632          */
1633         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1634         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1635             PAGE_SIZE <= 16384)
1636                 adapter->rx_ps_pages = pages;
1637         else
1638                 adapter->rx_ps_pages = 0;
1639 #endif
1640         if (adapter->rx_ps_pages) {
1641                 /* Configure extra packet-split registers */
1642                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1643                 rfctl |= E1000_RFCTL_EXTEN;
1644                 /* disable IPv6 packet split support */
1645                 rfctl |= E1000_RFCTL_IPV6_DIS;
1646                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1647
1648                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1649
1650                 psrctl |= adapter->rx_ps_bsize0 >>
1651                         E1000_PSRCTL_BSIZE0_SHIFT;
1652
1653                 switch (adapter->rx_ps_pages) {
1654                 case 3:
1655                         psrctl |= PAGE_SIZE <<
1656                                 E1000_PSRCTL_BSIZE3_SHIFT;
1657                 case 2:
1658                         psrctl |= PAGE_SIZE <<
1659                                 E1000_PSRCTL_BSIZE2_SHIFT;
1660                 case 1:
1661                         psrctl |= PAGE_SIZE >>
1662                                 E1000_PSRCTL_BSIZE1_SHIFT;
1663                         break;
1664                 }
1665
1666                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1667         }
1668
1669         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1670 }
1671
1672 /**
1673  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1674  * @adapter: board private structure
1675  *
1676  * Configure the Rx unit of the MAC after a reset.
1677  **/
1678
1679 static void
1680 e1000_configure_rx(struct e1000_adapter *adapter)
1681 {
1682         uint64_t rdba;
1683         struct e1000_hw *hw = &adapter->hw;
1684         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1685
1686         if (adapter->rx_ps_pages) {
1687                 /* this is a 32 byte descriptor */
1688                 rdlen = adapter->rx_ring[0].count *
1689                         sizeof(union e1000_rx_desc_packet_split);
1690                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1691                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1692         } else {
1693                 rdlen = adapter->rx_ring[0].count *
1694                         sizeof(struct e1000_rx_desc);
1695                 adapter->clean_rx = e1000_clean_rx_irq;
1696                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1697         }
1698
1699         /* disable receives while setting up the descriptors */
1700         rctl = E1000_READ_REG(hw, RCTL);
1701         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1702
1703         /* set the Receive Delay Timer Register */
1704         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1705
1706         if (hw->mac_type >= e1000_82540) {
1707                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1708                 if (adapter->itr > 1)
1709                         E1000_WRITE_REG(hw, ITR,
1710                                 1000000000 / (adapter->itr * 256));
1711         }
1712
1713         if (hw->mac_type >= e1000_82571) {
1714                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1715                 /* Reset delay timers after every interrupt */
1716                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1717 #ifdef CONFIG_E1000_NAPI
1718                 /* Auto-Mask interrupts upon ICR read. */
1719                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1720 #endif
1721                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1722                 E1000_WRITE_REG(hw, IAM, ~0);
1723                 E1000_WRITE_FLUSH(hw);
1724         }
1725
1726         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1727          * the Base and Length of the Rx Descriptor Ring */
1728         switch (adapter->num_rx_queues) {
1729         case 1:
1730         default:
1731                 rdba = adapter->rx_ring[0].dma;
1732                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1733                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1734                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1735                 E1000_WRITE_REG(hw, RDH, 0);
1736                 E1000_WRITE_REG(hw, RDT, 0);
1737                 adapter->rx_ring[0].rdh = E1000_RDH;
1738                 adapter->rx_ring[0].rdt = E1000_RDT;
1739                 break;
1740         }
1741
1742         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1743         if (hw->mac_type >= e1000_82543) {
1744                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1745                 if (adapter->rx_csum == TRUE) {
1746                         rxcsum |= E1000_RXCSUM_TUOFL;
1747
1748                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1749                          * Must be used in conjunction with packet-split. */
1750                         if ((hw->mac_type >= e1000_82571) &&
1751                             (adapter->rx_ps_pages)) {
1752                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1753                         }
1754                 } else {
1755                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1756                         /* don't need to clear IPPCSE as it defaults to 0 */
1757                 }
1758                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1759         }
1760
1761         if (hw->mac_type == e1000_82573)
1762                 E1000_WRITE_REG(hw, ERT, 0x0100);
1763
1764         /* Enable Receives */
1765         E1000_WRITE_REG(hw, RCTL, rctl);
1766 }
1767
1768 /**
1769  * e1000_free_tx_resources - Free Tx Resources per Queue
1770  * @adapter: board private structure
1771  * @tx_ring: Tx descriptor ring for a specific queue
1772  *
1773  * Free all transmit software resources
1774  **/
1775
1776 static void
1777 e1000_free_tx_resources(struct e1000_adapter *adapter,
1778                         struct e1000_tx_ring *tx_ring)
1779 {
1780         struct pci_dev *pdev = adapter->pdev;
1781
1782         e1000_clean_tx_ring(adapter, tx_ring);
1783
1784         vfree(tx_ring->buffer_info);
1785         tx_ring->buffer_info = NULL;
1786
1787         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1788
1789         tx_ring->desc = NULL;
1790 }
1791
1792 /**
1793  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1794  * @adapter: board private structure
1795  *
1796  * Free all transmit software resources
1797  **/
1798
1799 void
1800 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1801 {
1802         int i;
1803
1804         for (i = 0; i < adapter->num_tx_queues; i++)
1805                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1806 }
1807
1808 static inline void
1809 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1810                         struct e1000_buffer *buffer_info)
1811 {
1812         if (buffer_info->dma) {
1813                 pci_unmap_page(adapter->pdev,
1814                                 buffer_info->dma,
1815                                 buffer_info->length,
1816                                 PCI_DMA_TODEVICE);
1817         }
1818         if (buffer_info->skb)
1819                 dev_kfree_skb_any(buffer_info->skb);
1820         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1821 }
1822
1823 /**
1824  * e1000_clean_tx_ring - Free Tx Buffers
1825  * @adapter: board private structure
1826  * @tx_ring: ring to be cleaned
1827  **/
1828
1829 static void
1830 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1831                     struct e1000_tx_ring *tx_ring)
1832 {
1833         struct e1000_buffer *buffer_info;
1834         unsigned long size;
1835         unsigned int i;
1836
1837         /* Free all the Tx ring sk_buffs */
1838
1839         for (i = 0; i < tx_ring->count; i++) {
1840                 buffer_info = &tx_ring->buffer_info[i];
1841                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1842         }
1843
1844         size = sizeof(struct e1000_buffer) * tx_ring->count;
1845         memset(tx_ring->buffer_info, 0, size);
1846
1847         /* Zero out the descriptor ring */
1848
1849         memset(tx_ring->desc, 0, tx_ring->size);
1850
1851         tx_ring->next_to_use = 0;
1852         tx_ring->next_to_clean = 0;
1853         tx_ring->last_tx_tso = 0;
1854
1855         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1856         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1857 }
1858
1859 /**
1860  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1861  * @adapter: board private structure
1862  **/
1863
1864 static void
1865 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1866 {
1867         int i;
1868
1869         for (i = 0; i < adapter->num_tx_queues; i++)
1870                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1871 }
1872
1873 /**
1874  * e1000_free_rx_resources - Free Rx Resources
1875  * @adapter: board private structure
1876  * @rx_ring: ring to clean the resources from
1877  *
1878  * Free all receive software resources
1879  **/
1880
1881 static void
1882 e1000_free_rx_resources(struct e1000_adapter *adapter,
1883                         struct e1000_rx_ring *rx_ring)
1884 {
1885         struct pci_dev *pdev = adapter->pdev;
1886
1887         e1000_clean_rx_ring(adapter, rx_ring);
1888
1889         vfree(rx_ring->buffer_info);
1890         rx_ring->buffer_info = NULL;
1891         kfree(rx_ring->ps_page);
1892         rx_ring->ps_page = NULL;
1893         kfree(rx_ring->ps_page_dma);
1894         rx_ring->ps_page_dma = NULL;
1895
1896         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1897
1898         rx_ring->desc = NULL;
1899 }
1900
1901 /**
1902  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1903  * @adapter: board private structure
1904  *
1905  * Free all receive software resources
1906  **/
1907
1908 void
1909 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1910 {
1911         int i;
1912
1913         for (i = 0; i < adapter->num_rx_queues; i++)
1914                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1915 }
1916
1917 /**
1918  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1919  * @adapter: board private structure
1920  * @rx_ring: ring to free buffers from
1921  **/
1922
1923 static void
1924 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1925                     struct e1000_rx_ring *rx_ring)
1926 {
1927         struct e1000_buffer *buffer_info;
1928         struct e1000_ps_page *ps_page;
1929         struct e1000_ps_page_dma *ps_page_dma;
1930         struct pci_dev *pdev = adapter->pdev;
1931         unsigned long size;
1932         unsigned int i, j;
1933
1934         /* Free all the Rx ring sk_buffs */
1935         for (i = 0; i < rx_ring->count; i++) {
1936                 buffer_info = &rx_ring->buffer_info[i];
1937                 if (buffer_info->skb) {
1938                         pci_unmap_single(pdev,
1939                                          buffer_info->dma,
1940                                          buffer_info->length,
1941                                          PCI_DMA_FROMDEVICE);
1942
1943                         dev_kfree_skb(buffer_info->skb);
1944                         buffer_info->skb = NULL;
1945                 }
1946                 ps_page = &rx_ring->ps_page[i];
1947                 ps_page_dma = &rx_ring->ps_page_dma[i];
1948                 for (j = 0; j < adapter->rx_ps_pages; j++) {
1949                         if (!ps_page->ps_page[j]) break;
1950                         pci_unmap_page(pdev,
1951                                        ps_page_dma->ps_page_dma[j],
1952                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
1953                         ps_page_dma->ps_page_dma[j] = 0;
1954                         put_page(ps_page->ps_page[j]);
1955                         ps_page->ps_page[j] = NULL;
1956                 }
1957         }
1958
1959         size = sizeof(struct e1000_buffer) * rx_ring->count;
1960         memset(rx_ring->buffer_info, 0, size);
1961         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1962         memset(rx_ring->ps_page, 0, size);
1963         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1964         memset(rx_ring->ps_page_dma, 0, size);
1965
1966         /* Zero out the descriptor ring */
1967
1968         memset(rx_ring->desc, 0, rx_ring->size);
1969
1970         rx_ring->next_to_clean = 0;
1971         rx_ring->next_to_use = 0;
1972
1973         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1974         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1975 }
1976
1977 /**
1978  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
1979  * @adapter: board private structure
1980  **/
1981
1982 static void
1983 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
1984 {
1985         int i;
1986
1987         for (i = 0; i < adapter->num_rx_queues; i++)
1988                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1989 }
1990
1991 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1992  * and memory write and invalidate disabled for certain operations
1993  */
1994 static void
1995 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1996 {
1997         struct net_device *netdev = adapter->netdev;
1998         uint32_t rctl;
1999
2000         e1000_pci_clear_mwi(&adapter->hw);
2001
2002         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2003         rctl |= E1000_RCTL_RST;
2004         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2005         E1000_WRITE_FLUSH(&adapter->hw);
2006         mdelay(5);
2007
2008         if (netif_running(netdev))
2009                 e1000_clean_all_rx_rings(adapter);
2010 }
2011
2012 static void
2013 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2014 {
2015         struct net_device *netdev = adapter->netdev;
2016         uint32_t rctl;
2017
2018         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2019         rctl &= ~E1000_RCTL_RST;
2020         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2021         E1000_WRITE_FLUSH(&adapter->hw);
2022         mdelay(5);
2023
2024         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2025                 e1000_pci_set_mwi(&adapter->hw);
2026
2027         if (netif_running(netdev)) {
2028                 /* No need to loop, because 82542 supports only 1 queue */
2029                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2030                 e1000_configure_rx(adapter);
2031                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2032         }
2033 }
2034
2035 /**
2036  * e1000_set_mac - Change the Ethernet Address of the NIC
2037  * @netdev: network interface device structure
2038  * @p: pointer to an address structure
2039  *
2040  * Returns 0 on success, negative on failure
2041  **/
2042
2043 static int
2044 e1000_set_mac(struct net_device *netdev, void *p)
2045 {
2046         struct e1000_adapter *adapter = netdev_priv(netdev);
2047         struct sockaddr *addr = p;
2048
2049         if (!is_valid_ether_addr(addr->sa_data))
2050                 return -EADDRNOTAVAIL;
2051
2052         /* 82542 2.0 needs to be in reset to write receive address registers */
2053
2054         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2055                 e1000_enter_82542_rst(adapter);
2056
2057         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2058         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2059
2060         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2061
2062         /* With 82571 controllers, LAA may be overwritten (with the default)
2063          * due to controller reset from the other port. */
2064         if (adapter->hw.mac_type == e1000_82571) {
2065                 /* activate the work around */
2066                 adapter->hw.laa_is_present = 1;
2067
2068                 /* Hold a copy of the LAA in RAR[14] This is done so that
2069                  * between the time RAR[0] gets clobbered  and the time it
2070                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2071                  * of the RARs and no incoming packets directed to this port
2072                  * are dropped. Eventaully the LAA will be in RAR[0] and
2073                  * RAR[14] */
2074                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2075                                         E1000_RAR_ENTRIES - 1);
2076         }
2077
2078         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2079                 e1000_leave_82542_rst(adapter);
2080
2081         return 0;
2082 }
2083
2084 /**
2085  * e1000_set_multi - Multicast and Promiscuous mode set
2086  * @netdev: network interface device structure
2087  *
2088  * The set_multi entry point is called whenever the multicast address
2089  * list or the network interface flags are updated.  This routine is
2090  * responsible for configuring the hardware for proper multicast,
2091  * promiscuous mode, and all-multi behavior.
2092  **/
2093
2094 static void
2095 e1000_set_multi(struct net_device *netdev)
2096 {
2097         struct e1000_adapter *adapter = netdev_priv(netdev);
2098         struct e1000_hw *hw = &adapter->hw;
2099         struct dev_mc_list *mc_ptr;
2100         uint32_t rctl;
2101         uint32_t hash_value;
2102         int i, rar_entries = E1000_RAR_ENTRIES;
2103
2104         /* reserve RAR[14] for LAA over-write work-around */
2105         if (adapter->hw.mac_type == e1000_82571)
2106                 rar_entries--;
2107
2108         /* Check for Promiscuous and All Multicast modes */
2109
2110         rctl = E1000_READ_REG(hw, RCTL);
2111
2112         if (netdev->flags & IFF_PROMISC) {
2113                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2114         } else if (netdev->flags & IFF_ALLMULTI) {
2115                 rctl |= E1000_RCTL_MPE;
2116                 rctl &= ~E1000_RCTL_UPE;
2117         } else {
2118                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2119         }
2120
2121         E1000_WRITE_REG(hw, RCTL, rctl);
2122
2123         /* 82542 2.0 needs to be in reset to write receive address registers */
2124
2125         if (hw->mac_type == e1000_82542_rev2_0)
2126                 e1000_enter_82542_rst(adapter);
2127
2128         /* load the first 14 multicast address into the exact filters 1-14
2129          * RAR 0 is used for the station MAC adddress
2130          * if there are not 14 addresses, go ahead and clear the filters
2131          * -- with 82571 controllers only 0-13 entries are filled here
2132          */
2133         mc_ptr = netdev->mc_list;
2134
2135         for (i = 1; i < rar_entries; i++) {
2136                 if (mc_ptr) {
2137                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2138                         mc_ptr = mc_ptr->next;
2139                 } else {
2140                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2141                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2142                 }
2143         }
2144
2145         /* clear the old settings from the multicast hash table */
2146
2147         for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2148                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2149
2150         /* load any remaining addresses into the hash table */
2151
2152         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2153                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2154                 e1000_mta_set(hw, hash_value);
2155         }
2156
2157         if (hw->mac_type == e1000_82542_rev2_0)
2158                 e1000_leave_82542_rst(adapter);
2159 }
2160
2161 /* Need to wait a few seconds after link up to get diagnostic information from
2162  * the phy */
2163
2164 static void
2165 e1000_update_phy_info(unsigned long data)
2166 {
2167         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2168         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2169 }
2170
2171 /**
2172  * e1000_82547_tx_fifo_stall - Timer Call-back
2173  * @data: pointer to adapter cast into an unsigned long
2174  **/
2175
2176 static void
2177 e1000_82547_tx_fifo_stall(unsigned long data)
2178 {
2179         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2180         struct net_device *netdev = adapter->netdev;
2181         uint32_t tctl;
2182
2183         if (atomic_read(&adapter->tx_fifo_stall)) {
2184                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2185                     E1000_READ_REG(&adapter->hw, TDH)) &&
2186                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2187                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2188                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2189                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2190                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2191                         E1000_WRITE_REG(&adapter->hw, TCTL,
2192                                         tctl & ~E1000_TCTL_EN);
2193                         E1000_WRITE_REG(&adapter->hw, TDFT,
2194                                         adapter->tx_head_addr);
2195                         E1000_WRITE_REG(&adapter->hw, TDFH,
2196                                         adapter->tx_head_addr);
2197                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2198                                         adapter->tx_head_addr);
2199                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2200                                         adapter->tx_head_addr);
2201                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2202                         E1000_WRITE_FLUSH(&adapter->hw);
2203
2204                         adapter->tx_fifo_head = 0;
2205                         atomic_set(&adapter->tx_fifo_stall, 0);
2206                         netif_wake_queue(netdev);
2207                 } else {
2208                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2209                 }
2210         }
2211 }
2212
2213 /**
2214  * e1000_watchdog - Timer Call-back
2215  * @data: pointer to adapter cast into an unsigned long
2216  **/
2217 static void
2218 e1000_watchdog(unsigned long data)
2219 {
2220         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2221
2222         /* Do the rest outside of interrupt context */
2223         schedule_work(&adapter->watchdog_task);
2224 }
2225
2226 static void
2227 e1000_watchdog_task(struct e1000_adapter *adapter)
2228 {
2229         struct net_device *netdev = adapter->netdev;
2230         struct e1000_tx_ring *txdr = adapter->tx_ring;
2231         uint32_t link, tctl;
2232
2233         e1000_check_for_link(&adapter->hw);
2234         if (adapter->hw.mac_type == e1000_82573) {
2235                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2236                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2237                         e1000_update_mng_vlan(adapter);
2238         }
2239
2240         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2241            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2242                 link = !adapter->hw.serdes_link_down;
2243         else
2244                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2245
2246         if (link) {
2247                 if (!netif_carrier_ok(netdev)) {
2248                         e1000_get_speed_and_duplex(&adapter->hw,
2249                                                    &adapter->link_speed,
2250                                                    &adapter->link_duplex);
2251
2252                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2253                                adapter->link_speed,
2254                                adapter->link_duplex == FULL_DUPLEX ?
2255                                "Full Duplex" : "Half Duplex");
2256
2257                         /* tweak tx_queue_len according to speed/duplex
2258                          * and adjust the timeout factor */
2259                         netdev->tx_queue_len = adapter->tx_queue_len;
2260                         adapter->tx_timeout_factor = 1;
2261                         adapter->txb2b = 1;
2262                         switch (adapter->link_speed) {
2263                         case SPEED_10:
2264                                 adapter->txb2b = 0;
2265                                 netdev->tx_queue_len = 10;
2266                                 adapter->tx_timeout_factor = 8;
2267                                 break;
2268                         case SPEED_100:
2269                                 adapter->txb2b = 0;
2270                                 netdev->tx_queue_len = 100;
2271                                 /* maybe add some timeout factor ? */
2272                                 break;
2273                         }
2274
2275                         if ((adapter->hw.mac_type == e1000_82571 ||
2276                              adapter->hw.mac_type == e1000_82572) &&
2277                             adapter->txb2b == 0) {
2278 #define SPEED_MODE_BIT (1 << 21)
2279                                 uint32_t tarc0;
2280                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2281                                 tarc0 &= ~SPEED_MODE_BIT;
2282                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2283                         }
2284
2285 #ifdef NETIF_F_TSO
2286                         /* disable TSO for pcie and 10/100 speeds, to avoid
2287                          * some hardware issues */
2288                         if (!adapter->tso_force &&
2289                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2290                                 switch (adapter->link_speed) {
2291                                 case SPEED_10:
2292                                 case SPEED_100:
2293                                         DPRINTK(PROBE,INFO,
2294                                         "10/100 speed: disabling TSO\n");
2295                                         netdev->features &= ~NETIF_F_TSO;
2296                                         break;
2297                                 case SPEED_1000:
2298                                         netdev->features |= NETIF_F_TSO;
2299                                         break;
2300                                 default:
2301                                         /* oops */
2302                                         break;
2303                                 }
2304                         }
2305 #endif
2306
2307                         /* enable transmits in the hardware, need to do this
2308                          * after setting TARC0 */
2309                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2310                         tctl |= E1000_TCTL_EN;
2311                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2312
2313                         netif_carrier_on(netdev);
2314                         netif_wake_queue(netdev);
2315                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2316                         adapter->smartspeed = 0;
2317                 }
2318         } else {
2319                 if (netif_carrier_ok(netdev)) {
2320                         adapter->link_speed = 0;
2321                         adapter->link_duplex = 0;
2322                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2323                         netif_carrier_off(netdev);
2324                         netif_stop_queue(netdev);
2325                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2326
2327                         /* 80003ES2LAN workaround--
2328                          * For packet buffer work-around on link down event;
2329                          * disable receives in the ISR and
2330                          * reset device here in the watchdog
2331                          */
2332                         if (adapter->hw.mac_type == e1000_80003es2lan) {
2333                                 /* reset device */
2334                                 schedule_work(&adapter->reset_task);
2335                         }
2336                 }
2337
2338                 e1000_smartspeed(adapter);
2339         }
2340
2341         e1000_update_stats(adapter);
2342
2343         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2344         adapter->tpt_old = adapter->stats.tpt;
2345         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2346         adapter->colc_old = adapter->stats.colc;
2347
2348         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2349         adapter->gorcl_old = adapter->stats.gorcl;
2350         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2351         adapter->gotcl_old = adapter->stats.gotcl;
2352
2353         e1000_update_adaptive(&adapter->hw);
2354
2355         if (!netif_carrier_ok(netdev)) {
2356                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2357                         /* We've lost link, so the controller stops DMA,
2358                          * but we've got queued Tx work that's never going
2359                          * to get done, so reset controller to flush Tx.
2360                          * (Do the reset outside of interrupt context). */
2361                         adapter->tx_timeout_count++;
2362                         schedule_work(&adapter->reset_task);
2363                 }
2364         }
2365
2366         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2367         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2368                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2369                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2370                  * else is between 2000-8000. */
2371                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2372                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2373                         adapter->gotcl - adapter->gorcl :
2374                         adapter->gorcl - adapter->gotcl) / 10000;
2375                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2376                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2377         }
2378
2379         /* Cause software interrupt to ensure rx ring is cleaned */
2380         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2381
2382         /* Force detection of hung controller every watchdog period */
2383         adapter->detect_tx_hung = TRUE;
2384
2385         /* With 82571 controllers, LAA may be overwritten due to controller
2386          * reset from the other port. Set the appropriate LAA in RAR[0] */
2387         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2388                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2389
2390         /* Reset the timer */
2391         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2392 }
2393
2394 #define E1000_TX_FLAGS_CSUM             0x00000001
2395 #define E1000_TX_FLAGS_VLAN             0x00000002
2396 #define E1000_TX_FLAGS_TSO              0x00000004
2397 #define E1000_TX_FLAGS_IPV4             0x00000008
2398 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2399 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2400
2401 static inline int
2402 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2403           struct sk_buff *skb)
2404 {
2405 #ifdef NETIF_F_TSO
2406         struct e1000_context_desc *context_desc;
2407         struct e1000_buffer *buffer_info;
2408         unsigned int i;
2409         uint32_t cmd_length = 0;
2410         uint16_t ipcse = 0, tucse, mss;
2411         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2412         int err;
2413
2414         if (skb_shinfo(skb)->tso_size) {
2415                 if (skb_header_cloned(skb)) {
2416                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2417                         if (err)
2418                                 return err;
2419                 }
2420
2421                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2422                 mss = skb_shinfo(skb)->tso_size;
2423                 if (skb->protocol == ntohs(ETH_P_IP)) {
2424                         skb->nh.iph->tot_len = 0;
2425                         skb->nh.iph->check = 0;
2426                         skb->h.th->check =
2427                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2428                                                    skb->nh.iph->daddr,
2429                                                    0,
2430                                                    IPPROTO_TCP,
2431                                                    0);
2432                         cmd_length = E1000_TXD_CMD_IP;
2433                         ipcse = skb->h.raw - skb->data - 1;
2434 #ifdef NETIF_F_TSO_IPV6
2435                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2436                         skb->nh.ipv6h->payload_len = 0;
2437                         skb->h.th->check =
2438                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2439                                                  &skb->nh.ipv6h->daddr,
2440                                                  0,
2441                                                  IPPROTO_TCP,
2442                                                  0);
2443                         ipcse = 0;
2444 #endif
2445                 }
2446                 ipcss = skb->nh.raw - skb->data;
2447                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2448                 tucss = skb->h.raw - skb->data;
2449                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2450                 tucse = 0;
2451
2452                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2453                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2454
2455                 i = tx_ring->next_to_use;
2456                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2457                 buffer_info = &tx_ring->buffer_info[i];
2458
2459                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2460                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2461                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2462                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2463                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2464                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2465                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2466                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2467                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2468
2469                 buffer_info->time_stamp = jiffies;
2470
2471                 if (++i == tx_ring->count) i = 0;
2472                 tx_ring->next_to_use = i;
2473
2474                 return TRUE;
2475         }
2476 #endif
2477
2478         return FALSE;
2479 }
2480
2481 static inline boolean_t
2482 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2483               struct sk_buff *skb)
2484 {
2485         struct e1000_context_desc *context_desc;
2486         struct e1000_buffer *buffer_info;
2487         unsigned int i;
2488         uint8_t css;
2489
2490         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2491                 css = skb->h.raw - skb->data;
2492
2493                 i = tx_ring->next_to_use;
2494                 buffer_info = &tx_ring->buffer_info[i];
2495                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2496
2497                 context_desc->upper_setup.tcp_fields.tucss = css;
2498                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2499                 context_desc->upper_setup.tcp_fields.tucse = 0;
2500                 context_desc->tcp_seg_setup.data = 0;
2501                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2502
2503                 buffer_info->time_stamp = jiffies;
2504
2505                 if (unlikely(++i == tx_ring->count)) i = 0;
2506                 tx_ring->next_to_use = i;
2507
2508                 return TRUE;
2509         }
2510
2511         return FALSE;
2512 }
2513
2514 #define E1000_MAX_TXD_PWR       12
2515 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2516
2517 static inline int
2518 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2519              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2520              unsigned int nr_frags, unsigned int mss)
2521 {
2522         struct e1000_buffer *buffer_info;
2523         unsigned int len = skb->len;
2524         unsigned int offset = 0, size, count = 0, i;
2525         unsigned int f;
2526         len -= skb->data_len;
2527
2528         i = tx_ring->next_to_use;
2529
2530         while (len) {
2531                 buffer_info = &tx_ring->buffer_info[i];
2532                 size = min(len, max_per_txd);
2533 #ifdef NETIF_F_TSO
2534                 /* Workaround for Controller erratum --
2535                  * descriptor for non-tso packet in a linear SKB that follows a
2536                  * tso gets written back prematurely before the data is fully
2537                  * DMA'd to the controller */
2538                 if (!skb->data_len && tx_ring->last_tx_tso &&
2539                     !skb_shinfo(skb)->tso_size) {
2540                         tx_ring->last_tx_tso = 0;
2541                         size -= 4;
2542                 }
2543
2544                 /* Workaround for premature desc write-backs
2545                  * in TSO mode.  Append 4-byte sentinel desc */
2546                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2547                         size -= 4;
2548 #endif
2549                 /* work-around for errata 10 and it applies
2550                  * to all controllers in PCI-X mode
2551                  * The fix is to make sure that the first descriptor of a
2552                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2553                  */
2554                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2555                                 (size > 2015) && count == 0))
2556                         size = 2015;
2557
2558                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2559                  * terminating buffers within evenly-aligned dwords. */
2560                 if (unlikely(adapter->pcix_82544 &&
2561                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2562                    size > 4))
2563                         size -= 4;
2564
2565                 buffer_info->length = size;
2566                 buffer_info->dma =
2567                         pci_map_single(adapter->pdev,
2568                                 skb->data + offset,
2569                                 size,
2570                                 PCI_DMA_TODEVICE);
2571                 buffer_info->time_stamp = jiffies;
2572
2573                 len -= size;
2574                 offset += size;
2575                 count++;
2576                 if (unlikely(++i == tx_ring->count)) i = 0;
2577         }
2578
2579         for (f = 0; f < nr_frags; f++) {
2580                 struct skb_frag_struct *frag;
2581
2582                 frag = &skb_shinfo(skb)->frags[f];
2583                 len = frag->size;
2584                 offset = frag->page_offset;
2585
2586                 while (len) {
2587                         buffer_info = &tx_ring->buffer_info[i];
2588                         size = min(len, max_per_txd);
2589 #ifdef NETIF_F_TSO
2590                         /* Workaround for premature desc write-backs
2591                          * in TSO mode.  Append 4-byte sentinel desc */
2592                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2593                                 size -= 4;
2594 #endif
2595                         /* Workaround for potential 82544 hang in PCI-X.
2596                          * Avoid terminating buffers within evenly-aligned
2597                          * dwords. */
2598                         if (unlikely(adapter->pcix_82544 &&
2599                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2600                            size > 4))
2601                                 size -= 4;
2602
2603                         buffer_info->length = size;
2604                         buffer_info->dma =
2605                                 pci_map_page(adapter->pdev,
2606                                         frag->page,
2607                                         offset,
2608                                         size,
2609                                         PCI_DMA_TODEVICE);
2610                         buffer_info->time_stamp = jiffies;
2611
2612                         len -= size;
2613                         offset += size;
2614                         count++;
2615                         if (unlikely(++i == tx_ring->count)) i = 0;
2616                 }
2617         }
2618
2619         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2620         tx_ring->buffer_info[i].skb = skb;
2621         tx_ring->buffer_info[first].next_to_watch = i;
2622
2623         return count;
2624 }
2625
2626 static inline void
2627 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2628                int tx_flags, int count)
2629 {
2630         struct e1000_tx_desc *tx_desc = NULL;
2631         struct e1000_buffer *buffer_info;
2632         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2633         unsigned int i;
2634
2635         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2636                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2637                              E1000_TXD_CMD_TSE;
2638                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2639
2640                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2641                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2642         }
2643
2644         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2645                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2646                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2647         }
2648
2649         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2650                 txd_lower |= E1000_TXD_CMD_VLE;
2651                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2652         }
2653
2654         i = tx_ring->next_to_use;
2655
2656         while (count--) {
2657                 buffer_info = &tx_ring->buffer_info[i];
2658                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2659                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2660                 tx_desc->lower.data =
2661                         cpu_to_le32(txd_lower | buffer_info->length);
2662                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2663                 if (unlikely(++i == tx_ring->count)) i = 0;
2664         }
2665
2666         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2667
2668         /* Force memory writes to complete before letting h/w
2669          * know there are new descriptors to fetch.  (Only
2670          * applicable for weak-ordered memory model archs,
2671          * such as IA-64). */
2672         wmb();
2673
2674         tx_ring->next_to_use = i;
2675         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2676 }
2677
2678 /**
2679  * 82547 workaround to avoid controller hang in half-duplex environment.
2680  * The workaround is to avoid queuing a large packet that would span
2681  * the internal Tx FIFO ring boundary by notifying the stack to resend
2682  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2683  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2684  * to the beginning of the Tx FIFO.
2685  **/
2686
2687 #define E1000_FIFO_HDR                  0x10
2688 #define E1000_82547_PAD_LEN             0x3E0
2689
2690 static inline int
2691 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2692 {
2693         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2694         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2695
2696         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2697
2698         if (adapter->link_duplex != HALF_DUPLEX)
2699                 goto no_fifo_stall_required;
2700
2701         if (atomic_read(&adapter->tx_fifo_stall))
2702                 return 1;
2703
2704         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2705                 atomic_set(&adapter->tx_fifo_stall, 1);
2706                 return 1;
2707         }
2708
2709 no_fifo_stall_required:
2710         adapter->tx_fifo_head += skb_fifo_len;
2711         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2712                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2713         return 0;
2714 }
2715
2716 #define MINIMUM_DHCP_PACKET_SIZE 282
2717 static inline int
2718 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2719 {
2720         struct e1000_hw *hw =  &adapter->hw;
2721         uint16_t length, offset;
2722         if (vlan_tx_tag_present(skb)) {
2723                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2724                         ( adapter->hw.mng_cookie.status &
2725                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2726                         return 0;
2727         }
2728         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2729                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2730                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2731                         const struct iphdr *ip =
2732                                 (struct iphdr *)((uint8_t *)skb->data+14);
2733                         if (IPPROTO_UDP == ip->protocol) {
2734                                 struct udphdr *udp =
2735                                         (struct udphdr *)((uint8_t *)ip +
2736                                                 (ip->ihl << 2));
2737                                 if (ntohs(udp->dest) == 67) {
2738                                         offset = (uint8_t *)udp + 8 - skb->data;
2739                                         length = skb->len - offset;
2740
2741                                         return e1000_mng_write_dhcp_info(hw,
2742                                                         (uint8_t *)udp + 8,
2743                                                         length);
2744                                 }
2745                         }
2746                 }
2747         }
2748         return 0;
2749 }
2750
2751 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2752 static int
2753 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2754 {
2755         struct e1000_adapter *adapter = netdev_priv(netdev);
2756         struct e1000_tx_ring *tx_ring;
2757         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2758         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2759         unsigned int tx_flags = 0;
2760         unsigned int len = skb->len;
2761         unsigned long flags;
2762         unsigned int nr_frags = 0;
2763         unsigned int mss = 0;
2764         int count = 0;
2765         int tso;
2766         unsigned int f;
2767         len -= skb->data_len;
2768
2769         tx_ring = adapter->tx_ring;
2770
2771         if (unlikely(skb->len <= 0)) {
2772                 dev_kfree_skb_any(skb);
2773                 return NETDEV_TX_OK;
2774         }
2775
2776 #ifdef NETIF_F_TSO
2777         mss = skb_shinfo(skb)->tso_size;
2778         /* The controller does a simple calculation to
2779          * make sure there is enough room in the FIFO before
2780          * initiating the DMA for each buffer.  The calc is:
2781          * 4 = ceil(buffer len/mss).  To make sure we don't
2782          * overrun the FIFO, adjust the max buffer len if mss
2783          * drops. */
2784         if (mss) {
2785                 uint8_t hdr_len;
2786                 max_per_txd = min(mss << 2, max_per_txd);
2787                 max_txd_pwr = fls(max_per_txd) - 1;
2788
2789         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2790          * points to just header, pull a few bytes of payload from
2791          * frags into skb->data */
2792                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2793                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2794                         switch (adapter->hw.mac_type) {
2795                                 unsigned int pull_size;
2796                         case e1000_82571:
2797                         case e1000_82572:
2798                         case e1000_82573:
2799                                 pull_size = min((unsigned int)4, skb->data_len);
2800                                 if (!__pskb_pull_tail(skb, pull_size)) {
2801                                         printk(KERN_ERR
2802                                                 "__pskb_pull_tail failed.\n");
2803                                         dev_kfree_skb_any(skb);
2804                                         return NETDEV_TX_OK;
2805                                 }
2806                                 len = skb->len - skb->data_len;
2807                                 break;
2808                         default:
2809                                 /* do nothing */
2810                                 break;
2811                         }
2812                 }
2813         }
2814
2815         /* reserve a descriptor for the offload context */
2816         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2817                 count++;
2818         count++;
2819 #else
2820         if (skb->ip_summed == CHECKSUM_HW)
2821                 count++;
2822 #endif
2823
2824 #ifdef NETIF_F_TSO
2825         /* Controller Erratum workaround */
2826         if (!skb->data_len && tx_ring->last_tx_tso &&
2827             !skb_shinfo(skb)->tso_size)
2828                 count++;
2829 #endif
2830
2831         count += TXD_USE_COUNT(len, max_txd_pwr);
2832
2833         if (adapter->pcix_82544)
2834                 count++;
2835
2836         /* work-around for errata 10 and it applies to all controllers
2837          * in PCI-X mode, so add one more descriptor to the count
2838          */
2839         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2840                         (len > 2015)))
2841                 count++;
2842
2843         nr_frags = skb_shinfo(skb)->nr_frags;
2844         for (f = 0; f < nr_frags; f++)
2845                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2846                                        max_txd_pwr);
2847         if (adapter->pcix_82544)
2848                 count += nr_frags;
2849
2850
2851         if (adapter->hw.tx_pkt_filtering &&
2852             (adapter->hw.mac_type == e1000_82573))
2853                 e1000_transfer_dhcp_info(adapter, skb);
2854
2855         local_irq_save(flags);
2856         if (!spin_trylock(&tx_ring->tx_lock)) {
2857                 /* Collision - tell upper layer to requeue */
2858                 local_irq_restore(flags);
2859                 return NETDEV_TX_LOCKED;
2860         }
2861
2862         /* need: count + 2 desc gap to keep tail from touching
2863          * head, otherwise try next time */
2864         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2865                 netif_stop_queue(netdev);
2866                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2867                 return NETDEV_TX_BUSY;
2868         }
2869
2870         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2871                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2872                         netif_stop_queue(netdev);
2873                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2874                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2875                         return NETDEV_TX_BUSY;
2876                 }
2877         }
2878
2879         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2880                 tx_flags |= E1000_TX_FLAGS_VLAN;
2881                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2882         }
2883
2884         first = tx_ring->next_to_use;
2885
2886         tso = e1000_tso(adapter, tx_ring, skb);
2887         if (tso < 0) {
2888                 dev_kfree_skb_any(skb);
2889                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2890                 return NETDEV_TX_OK;
2891         }
2892
2893         if (likely(tso)) {
2894                 tx_ring->last_tx_tso = 1;
2895                 tx_flags |= E1000_TX_FLAGS_TSO;
2896         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2897                 tx_flags |= E1000_TX_FLAGS_CSUM;
2898
2899         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2900          * 82571 hardware supports TSO capabilities for IPv6 as well...
2901          * no longer assume, we must. */
2902         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2903                 tx_flags |= E1000_TX_FLAGS_IPV4;
2904
2905         e1000_tx_queue(adapter, tx_ring, tx_flags,
2906                        e1000_tx_map(adapter, tx_ring, skb, first,
2907                                     max_per_txd, nr_frags, mss));
2908
2909         netdev->trans_start = jiffies;
2910
2911         /* Make sure there is space in the ring for the next send. */
2912         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2913                 netif_stop_queue(netdev);
2914
2915         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2916         return NETDEV_TX_OK;
2917 }
2918
2919 /**
2920  * e1000_tx_timeout - Respond to a Tx Hang
2921  * @netdev: network interface device structure
2922  **/
2923
2924 static void
2925 e1000_tx_timeout(struct net_device *netdev)
2926 {
2927         struct e1000_adapter *adapter = netdev_priv(netdev);
2928
2929         /* Do the reset outside of interrupt context */
2930         adapter->tx_timeout_count++;
2931         schedule_work(&adapter->reset_task);
2932 }
2933
2934 static void
2935 e1000_reset_task(struct net_device *netdev)
2936 {
2937         struct e1000_adapter *adapter = netdev_priv(netdev);
2938
2939         e1000_down(adapter);
2940         e1000_up(adapter);
2941 }
2942
2943 /**
2944  * e1000_get_stats - Get System Network Statistics
2945  * @netdev: network interface device structure
2946  *
2947  * Returns the address of the device statistics structure.
2948  * The statistics are actually updated from the timer callback.
2949  **/
2950
2951 static struct net_device_stats *
2952 e1000_get_stats(struct net_device *netdev)
2953 {
2954         struct e1000_adapter *adapter = netdev_priv(netdev);
2955
2956         /* only return the current stats */
2957         return &adapter->net_stats;
2958 }
2959
2960 /**
2961  * e1000_change_mtu - Change the Maximum Transfer Unit
2962  * @netdev: network interface device structure
2963  * @new_mtu: new value for maximum frame size
2964  *
2965  * Returns 0 on success, negative on failure
2966  **/
2967
2968 static int
2969 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2970 {
2971         struct e1000_adapter *adapter = netdev_priv(netdev);
2972         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2973         uint16_t eeprom_data = 0;
2974
2975         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2976             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2977                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2978                 return -EINVAL;
2979         }
2980
2981         /* Adapter-specific max frame size limits. */
2982         switch (adapter->hw.mac_type) {
2983         case e1000_82542_rev2_0:
2984         case e1000_82542_rev2_1:
2985                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2986                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
2987                         return -EINVAL;
2988                 }
2989                 break;
2990         case e1000_82573:
2991                 /* only enable jumbo frames if ASPM is disabled completely
2992                  * this means both bits must be zero in 0x1A bits 3:2 */
2993                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
2994                                   &eeprom_data);
2995                 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
2996                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2997                                 DPRINTK(PROBE, ERR,
2998                                         "Jumbo Frames not supported.\n");
2999                                 return -EINVAL;
3000                         }
3001                         break;
3002                 }
3003                 /* fall through to get support */
3004         case e1000_82571:
3005         case e1000_82572:
3006         case e1000_80003es2lan:
3007 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3008                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3009                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3010                         return -EINVAL;
3011                 }
3012                 break;
3013         default:
3014                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3015                 break;
3016         }
3017
3018
3019         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3020                 adapter->rx_buffer_len = max_frame;
3021                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3022         } else {
3023                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
3024                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
3025                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
3026                                             "on 82542\n");
3027                         return -EINVAL;
3028                 } else {
3029                         if(max_frame <= E1000_RXBUFFER_2048)
3030                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3031                         else if(max_frame <= E1000_RXBUFFER_4096)
3032                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3033                         else if(max_frame <= E1000_RXBUFFER_8192)
3034                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3035                         else if(max_frame <= E1000_RXBUFFER_16384)
3036                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3037                 }
3038         }
3039
3040         netdev->mtu = new_mtu;
3041
3042         if (netif_running(netdev)) {
3043                 e1000_down(adapter);
3044                 e1000_up(adapter);
3045         }
3046
3047         adapter->hw.max_frame_size = max_frame;
3048
3049         return 0;
3050 }
3051
3052 /**
3053  * e1000_update_stats - Update the board statistics counters
3054  * @adapter: board private structure
3055  **/
3056
3057 void
3058 e1000_update_stats(struct e1000_adapter *adapter)
3059 {
3060         struct e1000_hw *hw = &adapter->hw;
3061         unsigned long flags;
3062         uint16_t phy_tmp;
3063
3064 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3065
3066         spin_lock_irqsave(&adapter->stats_lock, flags);
3067
3068         /* these counters are modified from e1000_adjust_tbi_stats,
3069          * called from the interrupt context, so they must only
3070          * be written while holding adapter->stats_lock
3071          */
3072
3073         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3074         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3075         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3076         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3077         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3078         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3079         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3080         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3081         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3082         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3083         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3084         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3085         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3086
3087         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3088         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3089         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3090         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3091         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3092         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3093         adapter->stats.dc += E1000_READ_REG(hw, DC);
3094         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3095         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3096         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3097         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3098         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3099         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3100         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3101         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3102         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3103         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3104         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3105         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3106         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3107         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3108         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3109         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3110         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3111         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3112         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3113         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3114         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3115         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3116         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3117         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3118         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3119         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3120         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3121
3122         /* used for adaptive IFS */
3123
3124         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3125         adapter->stats.tpt += hw->tx_packet_delta;
3126         hw->collision_delta = E1000_READ_REG(hw, COLC);
3127         adapter->stats.colc += hw->collision_delta;
3128
3129         if (hw->mac_type >= e1000_82543) {
3130                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3131                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3132                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3133                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3134                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3135                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3136         }
3137         if (hw->mac_type > e1000_82547_rev_2) {
3138                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3139                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3140                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3141                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3142                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3143                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3144                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3145                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3146                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3147         }
3148
3149         /* Fill out the OS statistics structure */
3150
3151         adapter->net_stats.rx_packets = adapter->stats.gprc;
3152         adapter->net_stats.tx_packets = adapter->stats.gptc;
3153         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3154         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3155         adapter->net_stats.multicast = adapter->stats.mprc;
3156         adapter->net_stats.collisions = adapter->stats.colc;
3157
3158         /* Rx Errors */
3159
3160         /* RLEC on some newer hardware can be incorrect so build
3161         * our own version based on RUC and ROC */
3162         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3163                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3164                 adapter->stats.ruc + adapter->stats.roc +
3165                 adapter->stats.cexterr;
3166         adapter->net_stats.rx_dropped = 0;
3167         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3168                                               adapter->stats.roc;
3169         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3170         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3171         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3172
3173         /* Tx Errors */
3174
3175         adapter->net_stats.tx_errors = adapter->stats.ecol +
3176                                        adapter->stats.latecol;
3177         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3178         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3179         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3180
3181         /* Tx Dropped needs to be maintained elsewhere */
3182
3183         /* Phy Stats */
3184
3185         if (hw->media_type == e1000_media_type_copper) {
3186                 if ((adapter->link_speed == SPEED_1000) &&
3187                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3188                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3189                         adapter->phy_stats.idle_errors += phy_tmp;
3190                 }
3191
3192                 if ((hw->mac_type <= e1000_82546) &&
3193                    (hw->phy_type == e1000_phy_m88) &&
3194                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3195                         adapter->phy_stats.receive_errors += phy_tmp;
3196         }
3197
3198         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3199 }
3200
3201 /**
3202  * e1000_intr - Interrupt Handler
3203  * @irq: interrupt number
3204  * @data: pointer to a network interface device structure
3205  * @pt_regs: CPU registers structure
3206  **/
3207
3208 static irqreturn_t
3209 e1000_intr(int irq, void *data, struct pt_regs *regs)
3210 {
3211         struct net_device *netdev = data;
3212         struct e1000_adapter *adapter = netdev_priv(netdev);
3213         struct e1000_hw *hw = &adapter->hw;
3214         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3215 #ifndef CONFIG_E1000_NAPI
3216         int i;
3217 #else
3218         /* Interrupt Auto-Mask...upon reading ICR,
3219          * interrupts are masked.  No need for the
3220          * IMC write, but it does mean we should
3221          * account for it ASAP. */
3222         if (likely(hw->mac_type >= e1000_82571))
3223                 atomic_inc(&adapter->irq_sem);
3224 #endif
3225
3226         if (unlikely(!icr)) {
3227 #ifdef CONFIG_E1000_NAPI
3228                 if (hw->mac_type >= e1000_82571)
3229                         e1000_irq_enable(adapter);
3230 #endif
3231                 return IRQ_NONE;  /* Not our interrupt */
3232         }
3233
3234         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3235                 hw->get_link_status = 1;
3236                 /* 80003ES2LAN workaround--
3237                  * For packet buffer work-around on link down event;
3238                  * disable receives here in the ISR and
3239                  * reset adapter in watchdog
3240                  */
3241                 if (netif_carrier_ok(netdev) &&
3242                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3243                         /* disable receives */
3244                         rctl = E1000_READ_REG(hw, RCTL);
3245                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3246                 }
3247                 mod_timer(&adapter->watchdog_timer, jiffies);
3248         }
3249
3250 #ifdef CONFIG_E1000_NAPI
3251         if (unlikely(hw->mac_type < e1000_82571)) {
3252                 atomic_inc(&adapter->irq_sem);
3253                 E1000_WRITE_REG(hw, IMC, ~0);
3254                 E1000_WRITE_FLUSH(hw);
3255         }
3256         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3257                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3258         else
3259                 e1000_irq_enable(adapter);
3260 #else
3261         /* Writing IMC and IMS is needed for 82547.
3262          * Due to Hub Link bus being occupied, an interrupt
3263          * de-assertion message is not able to be sent.
3264          * When an interrupt assertion message is generated later,
3265          * two messages are re-ordered and sent out.
3266          * That causes APIC to think 82547 is in de-assertion
3267          * state, while 82547 is in assertion state, resulting
3268          * in dead lock. Writing IMC forces 82547 into
3269          * de-assertion state.
3270          */
3271         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3272                 atomic_inc(&adapter->irq_sem);
3273                 E1000_WRITE_REG(hw, IMC, ~0);
3274         }
3275
3276         for (i = 0; i < E1000_MAX_INTR; i++)
3277                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3278                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3279                         break;
3280
3281         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3282                 e1000_irq_enable(adapter);
3283
3284 #endif
3285
3286         return IRQ_HANDLED;
3287 }
3288
3289 #ifdef CONFIG_E1000_NAPI
3290 /**
3291  * e1000_clean - NAPI Rx polling callback
3292  * @adapter: board private structure
3293  **/
3294
3295 static int
3296 e1000_clean(struct net_device *poll_dev, int *budget)
3297 {
3298         struct e1000_adapter *adapter;
3299         int work_to_do = min(*budget, poll_dev->quota);
3300         int tx_cleaned = 0, i = 0, work_done = 0;
3301
3302         /* Must NOT use netdev_priv macro here. */
3303         adapter = poll_dev->priv;
3304
3305         /* Keep link state information with original netdev */
3306         if (!netif_carrier_ok(adapter->netdev))
3307                 goto quit_polling;
3308
3309         while (poll_dev != &adapter->polling_netdev[i]) {
3310                 i++;
3311                 if (unlikely(i == adapter->num_rx_queues))
3312                         BUG();
3313         }
3314
3315         if (likely(adapter->num_tx_queues == 1)) {
3316                 /* e1000_clean is called per-cpu.  This lock protects
3317                  * tx_ring[0] from being cleaned by multiple cpus
3318                  * simultaneously.  A failure obtaining the lock means
3319                  * tx_ring[0] is currently being cleaned anyway. */
3320                 if (spin_trylock(&adapter->tx_queue_lock)) {
3321                         tx_cleaned = e1000_clean_tx_irq(adapter,
3322                                                         &adapter->tx_ring[0]);
3323                         spin_unlock(&adapter->tx_queue_lock);
3324                 }
3325         } else
3326                 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3327
3328         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3329                           &work_done, work_to_do);
3330
3331         *budget -= work_done;
3332         poll_dev->quota -= work_done;
3333
3334         /* If no Tx and not enough Rx work done, exit the polling mode */
3335         if ((!tx_cleaned && (work_done == 0)) ||
3336            !netif_running(adapter->netdev)) {
3337 quit_polling:
3338                 netif_rx_complete(poll_dev);
3339                 e1000_irq_enable(adapter);
3340                 return 0;
3341         }
3342
3343         return 1;
3344 }
3345
3346 #endif
3347 /**
3348  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3349  * @adapter: board private structure
3350  **/
3351
3352 static boolean_t
3353 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3354                    struct e1000_tx_ring *tx_ring)
3355 {
3356         struct net_device *netdev = adapter->netdev;
3357         struct e1000_tx_desc *tx_desc, *eop_desc;
3358         struct e1000_buffer *buffer_info;
3359         unsigned int i, eop;
3360 #ifdef CONFIG_E1000_NAPI
3361         unsigned int count = 0;
3362 #endif
3363         boolean_t cleaned = FALSE;
3364
3365         i = tx_ring->next_to_clean;
3366         eop = tx_ring->buffer_info[i].next_to_watch;
3367         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3368
3369         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3370                 for (cleaned = FALSE; !cleaned; ) {
3371                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3372                         buffer_info = &tx_ring->buffer_info[i];
3373                         cleaned = (i == eop);
3374
3375                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3376                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3377
3378                         if (unlikely(++i == tx_ring->count)) i = 0;
3379                 }
3380
3381
3382                 eop = tx_ring->buffer_info[i].next_to_watch;
3383                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3384 #ifdef CONFIG_E1000_NAPI
3385 #define E1000_TX_WEIGHT 64
3386                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3387                 if (count++ == E1000_TX_WEIGHT) break;
3388 #endif
3389         }
3390
3391         tx_ring->next_to_clean = i;
3392
3393         spin_lock(&tx_ring->tx_lock);
3394
3395         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3396                     netif_carrier_ok(netdev)))
3397                 netif_wake_queue(netdev);
3398
3399         spin_unlock(&tx_ring->tx_lock);
3400
3401         if (adapter->detect_tx_hung) {
3402                 /* Detect a transmit hang in hardware, this serializes the
3403                  * check with the clearing of time_stamp and movement of i */
3404                 adapter->detect_tx_hung = FALSE;
3405                 if (tx_ring->buffer_info[eop].dma &&
3406                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3407                                (adapter->tx_timeout_factor * HZ))
3408                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3409                          E1000_STATUS_TXOFF)) {
3410
3411                         /* detected Tx unit hang */
3412                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3413                                         "  Tx Queue             <%lu>\n"
3414                                         "  TDH                  <%x>\n"
3415                                         "  TDT                  <%x>\n"
3416                                         "  next_to_use          <%x>\n"
3417                                         "  next_to_clean        <%x>\n"
3418                                         "buffer_info[next_to_clean]\n"
3419                                         "  time_stamp           <%lx>\n"
3420                                         "  next_to_watch        <%x>\n"
3421                                         "  jiffies              <%lx>\n"
3422                                         "  next_to_watch.status <%x>\n",
3423                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3424                                         sizeof(struct e1000_tx_ring)),
3425                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3426                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3427                                 tx_ring->next_to_use,
3428                                 tx_ring->next_to_clean,
3429                                 tx_ring->buffer_info[eop].time_stamp,
3430                                 eop,
3431                                 jiffies,
3432                                 eop_desc->upper.fields.status);
3433                         netif_stop_queue(netdev);
3434                 }
3435         }
3436         return cleaned;
3437 }
3438
3439 /**
3440  * e1000_rx_checksum - Receive Checksum Offload for 82543
3441  * @adapter:     board private structure
3442  * @status_err:  receive descriptor status and error fields
3443  * @csum:        receive descriptor csum field
3444  * @sk_buff:     socket buffer with received data
3445  **/
3446
3447 static inline void
3448 e1000_rx_checksum(struct e1000_adapter *adapter,
3449                   uint32_t status_err, uint32_t csum,
3450                   struct sk_buff *skb)
3451 {
3452         uint16_t status = (uint16_t)status_err;
3453         uint8_t errors = (uint8_t)(status_err >> 24);
3454         skb->ip_summed = CHECKSUM_NONE;
3455
3456         /* 82543 or newer only */
3457         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3458         /* Ignore Checksum bit is set */
3459         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3460         /* TCP/UDP checksum error bit is set */
3461         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3462                 /* let the stack verify checksum errors */
3463                 adapter->hw_csum_err++;
3464                 return;
3465         }
3466         /* TCP/UDP Checksum has not been calculated */
3467         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3468                 if (!(status & E1000_RXD_STAT_TCPCS))
3469                         return;
3470         } else {
3471                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3472                         return;
3473         }
3474         /* It must be a TCP or UDP packet with a valid checksum */
3475         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3476                 /* TCP checksum is good */
3477                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3478         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3479                 /* IP fragment with UDP payload */
3480                 /* Hardware complements the payload checksum, so we undo it
3481                  * and then put the value in host order for further stack use.
3482                  */
3483                 csum = ntohl(csum ^ 0xFFFF);
3484                 skb->csum = csum;
3485                 skb->ip_summed = CHECKSUM_HW;
3486         }
3487         adapter->hw_csum_good++;
3488 }
3489
3490 /**
3491  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3492  * @adapter: board private structure
3493  **/
3494
3495 static boolean_t
3496 #ifdef CONFIG_E1000_NAPI
3497 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3498                    struct e1000_rx_ring *rx_ring,
3499                    int *work_done, int work_to_do)
3500 #else
3501 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3502                    struct e1000_rx_ring *rx_ring)
3503 #endif
3504 {
3505         struct net_device *netdev = adapter->netdev;
3506         struct pci_dev *pdev = adapter->pdev;
3507         struct e1000_rx_desc *rx_desc, *next_rxd;
3508         struct e1000_buffer *buffer_info, *next_buffer;
3509         unsigned long flags;
3510         uint32_t length;
3511         uint8_t last_byte;
3512         unsigned int i;
3513         int cleaned_count = 0;
3514         boolean_t cleaned = FALSE;
3515
3516         i = rx_ring->next_to_clean;
3517         rx_desc = E1000_RX_DESC(*rx_ring, i);
3518         buffer_info = &rx_ring->buffer_info[i];
3519
3520         while (rx_desc->status & E1000_RXD_STAT_DD) {
3521                 struct sk_buff *skb, *next_skb;
3522                 u8 status;
3523 #ifdef CONFIG_E1000_NAPI
3524                 if (*work_done >= work_to_do)
3525                         break;
3526                 (*work_done)++;
3527 #endif
3528                 status = rx_desc->status;
3529                 skb = buffer_info->skb;
3530                 buffer_info->skb = NULL;
3531
3532                 prefetch(skb->data - NET_IP_ALIGN);
3533
3534                 if (++i == rx_ring->count) i = 0;
3535                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3536                 prefetch(next_rxd);
3537
3538                 next_buffer = &rx_ring->buffer_info[i];
3539                 next_skb = next_buffer->skb;
3540                 prefetch(next_skb->data - NET_IP_ALIGN);
3541
3542                 cleaned = TRUE;
3543                 cleaned_count++;
3544                 pci_unmap_single(pdev,
3545                                  buffer_info->dma,
3546                                  buffer_info->length,
3547                                  PCI_DMA_FROMDEVICE);
3548
3549                 length = le16_to_cpu(rx_desc->length);
3550
3551                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3552                         /* All receives must fit into a single buffer */
3553                         E1000_DBG("%s: Receive packet consumed multiple"
3554                                   " buffers\n", netdev->name);
3555                         dev_kfree_skb_irq(skb);
3556                         goto next_desc;
3557                 }
3558
3559                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3560                         last_byte = *(skb->data + length - 1);
3561                         if (TBI_ACCEPT(&adapter->hw, status,
3562                                       rx_desc->errors, length, last_byte)) {
3563                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3564                                 e1000_tbi_adjust_stats(&adapter->hw,
3565                                                        &adapter->stats,
3566                                                        length, skb->data);
3567                                 spin_unlock_irqrestore(&adapter->stats_lock,
3568                                                        flags);
3569                                 length--;
3570                         } else {
3571                                 dev_kfree_skb_irq(skb);
3572                                 goto next_desc;
3573                         }
3574                 }
3575
3576                 /* code added for copybreak, this should improve
3577                  * performance for small packets with large amounts
3578                  * of reassembly being done in the stack */
3579 #define E1000_CB_LENGTH 256
3580                 if (length < E1000_CB_LENGTH) {
3581                         struct sk_buff *new_skb =
3582                             dev_alloc_skb(length + NET_IP_ALIGN);
3583                         if (new_skb) {
3584                                 skb_reserve(new_skb, NET_IP_ALIGN);
3585                                 new_skb->dev = netdev;
3586                                 memcpy(new_skb->data - NET_IP_ALIGN,
3587                                        skb->data - NET_IP_ALIGN,
3588                                        length + NET_IP_ALIGN);
3589                                 /* save the skb in buffer_info as good */
3590                                 buffer_info->skb = skb;
3591                                 skb = new_skb;
3592                                 skb_put(skb, length);
3593                         }
3594                 } else
3595                         skb_put(skb, length);
3596
3597                 /* end copybreak code */
3598
3599                 /* Receive Checksum Offload */
3600                 e1000_rx_checksum(adapter,
3601                                   (uint32_t)(status) |
3602                                   ((uint32_t)(rx_desc->errors) << 24),
3603                                   le16_to_cpu(rx_desc->csum), skb);
3604
3605                 skb->protocol = eth_type_trans(skb, netdev);
3606 #ifdef CONFIG_E1000_NAPI
3607                 if (unlikely(adapter->vlgrp &&
3608                             (status & E1000_RXD_STAT_VP))) {
3609                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3610                                                  le16_to_cpu(rx_desc->special) &
3611                                                  E1000_RXD_SPC_VLAN_MASK);
3612                 } else {
3613                         netif_receive_skb(skb);
3614                 }
3615 #else /* CONFIG_E1000_NAPI */
3616                 if (unlikely(adapter->vlgrp &&
3617                             (status & E1000_RXD_STAT_VP))) {
3618                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3619                                         le16_to_cpu(rx_desc->special) &
3620                                         E1000_RXD_SPC_VLAN_MASK);
3621                 } else {
3622                         netif_rx(skb);
3623                 }
3624 #endif /* CONFIG_E1000_NAPI */
3625                 netdev->last_rx = jiffies;
3626
3627 next_desc:
3628                 rx_desc->status = 0;
3629
3630                 /* return some buffers to hardware, one at a time is too slow */
3631                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3632                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3633                         cleaned_count = 0;
3634                 }
3635
3636                 /* use prefetched values */
3637                 rx_desc = next_rxd;
3638                 buffer_info = next_buffer;
3639         }
3640         rx_ring->next_to_clean = i;
3641
3642         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3643         if (cleaned_count)
3644                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3645
3646         return cleaned;
3647 }
3648
3649 /**
3650  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3651  * @adapter: board private structure
3652  **/
3653
3654 static boolean_t
3655 #ifdef CONFIG_E1000_NAPI
3656 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3657                       struct e1000_rx_ring *rx_ring,
3658                       int *work_done, int work_to_do)
3659 #else
3660 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3661                       struct e1000_rx_ring *rx_ring)
3662 #endif
3663 {
3664         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3665         struct net_device *netdev = adapter->netdev;
3666         struct pci_dev *pdev = adapter->pdev;
3667         struct e1000_buffer *buffer_info, *next_buffer;
3668         struct e1000_ps_page *ps_page;
3669         struct e1000_ps_page_dma *ps_page_dma;
3670         struct sk_buff *skb, *next_skb;
3671         unsigned int i, j;
3672         uint32_t length, staterr;
3673         int cleaned_count = 0;
3674         boolean_t cleaned = FALSE;
3675
3676         i = rx_ring->next_to_clean;
3677         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3678         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3679
3680         while (staterr & E1000_RXD_STAT_DD) {
3681                 buffer_info = &rx_ring->buffer_info[i];
3682                 ps_page = &rx_ring->ps_page[i];
3683                 ps_page_dma = &rx_ring->ps_page_dma[i];
3684 #ifdef CONFIG_E1000_NAPI
3685                 if (unlikely(*work_done >= work_to_do))
3686                         break;
3687                 (*work_done)++;
3688 #endif
3689                 skb = buffer_info->skb;
3690
3691                 /* in the packet split case this is header only */
3692                 prefetch(skb->data - NET_IP_ALIGN);
3693
3694                 if (++i == rx_ring->count) i = 0;
3695                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3696                 prefetch(next_rxd);
3697
3698                 next_buffer = &rx_ring->buffer_info[i];
3699                 next_skb = next_buffer->skb;
3700                 prefetch(next_skb->data - NET_IP_ALIGN);
3701
3702                 cleaned = TRUE;
3703                 cleaned_count++;
3704                 pci_unmap_single(pdev, buffer_info->dma,
3705                                  buffer_info->length,
3706                                  PCI_DMA_FROMDEVICE);
3707
3708                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3709                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3710                                   " the full packet\n", netdev->name);
3711                         dev_kfree_skb_irq(skb);
3712                         goto next_desc;
3713                 }
3714
3715                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3716                         dev_kfree_skb_irq(skb);
3717                         goto next_desc;
3718                 }
3719
3720                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3721
3722                 if (unlikely(!length)) {
3723                         E1000_DBG("%s: Last part of the packet spanning"
3724                                   " multiple descriptors\n", netdev->name);
3725                         dev_kfree_skb_irq(skb);
3726                         goto next_desc;
3727                 }
3728
3729                 /* Good Receive */
3730                 skb_put(skb, length);
3731
3732                 {
3733                 /* this looks ugly, but it seems compiler issues make it
3734                    more efficient than reusing j */
3735                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3736
3737                 /* page alloc/put takes too long and effects small packet
3738                  * throughput, so unsplit small packets and save the alloc/put*/
3739                 if (l1 && ((length + l1) < E1000_CB_LENGTH)) {
3740                         u8 *vaddr;
3741                         /* there is no documentation about how to call
3742                          * kmap_atomic, so we can't hold the mapping
3743                          * very long */
3744                         pci_dma_sync_single_for_cpu(pdev,
3745                                 ps_page_dma->ps_page_dma[0],
3746                                 PAGE_SIZE,
3747                                 PCI_DMA_FROMDEVICE);
3748                         vaddr = kmap_atomic(ps_page->ps_page[0],
3749                                             KM_SKB_DATA_SOFTIRQ);
3750                         memcpy(skb->tail, vaddr, l1);
3751                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3752                         pci_dma_sync_single_for_device(pdev,
3753                                 ps_page_dma->ps_page_dma[0],
3754                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3755                         skb_put(skb, l1);
3756                         length += l1;
3757                         goto copydone;
3758                 } /* if */
3759                 }
3760
3761                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3762                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3763                                 break;
3764                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3765                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3766                         ps_page_dma->ps_page_dma[j] = 0;
3767                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3768                                            length);
3769                         ps_page->ps_page[j] = NULL;
3770                         skb->len += length;
3771                         skb->data_len += length;
3772                 }
3773
3774 copydone:
3775                 e1000_rx_checksum(adapter, staterr,
3776                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
3777                 skb->protocol = eth_type_trans(skb, netdev);
3778
3779                 if (likely(rx_desc->wb.upper.header_status &
3780                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
3781                         adapter->rx_hdr_split++;
3782 #ifdef CONFIG_E1000_NAPI
3783                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3784                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3785                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3786                                 E1000_RXD_SPC_VLAN_MASK);
3787                 } else {
3788                         netif_receive_skb(skb);
3789                 }
3790 #else /* CONFIG_E1000_NAPI */
3791                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3792                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3793                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3794                                 E1000_RXD_SPC_VLAN_MASK);
3795                 } else {
3796                         netif_rx(skb);
3797                 }
3798 #endif /* CONFIG_E1000_NAPI */
3799                 netdev->last_rx = jiffies;
3800
3801 next_desc:
3802                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
3803                 buffer_info->skb = NULL;
3804
3805                 /* return some buffers to hardware, one at a time is too slow */
3806                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3807                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3808                         cleaned_count = 0;
3809                 }
3810
3811                 /* use prefetched values */
3812                 rx_desc = next_rxd;
3813                 buffer_info = next_buffer;
3814
3815                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3816         }
3817         rx_ring->next_to_clean = i;
3818
3819         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3820         if (cleaned_count)
3821                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3822
3823         return cleaned;
3824 }
3825
3826 /**
3827  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3828  * @adapter: address of board private structure
3829  **/
3830
3831 static void
3832 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3833                        struct e1000_rx_ring *rx_ring,
3834                        int cleaned_count)
3835 {
3836         struct net_device *netdev = adapter->netdev;
3837         struct pci_dev *pdev = adapter->pdev;
3838         struct e1000_rx_desc *rx_desc;
3839         struct e1000_buffer *buffer_info;
3840         struct sk_buff *skb;
3841         unsigned int i;
3842         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3843
3844         i = rx_ring->next_to_use;
3845         buffer_info = &rx_ring->buffer_info[i];
3846
3847         while (cleaned_count--) {
3848                 if (!(skb = buffer_info->skb))
3849                         skb = dev_alloc_skb(bufsz);
3850                 else {
3851                         skb_trim(skb, 0);
3852                         goto map_skb;
3853                 }
3854
3855                 if (unlikely(!skb)) {
3856                         /* Better luck next round */
3857                         adapter->alloc_rx_buff_failed++;
3858                         break;
3859                 }
3860
3861                 /* Fix for errata 23, can't cross 64kB boundary */
3862                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3863                         struct sk_buff *oldskb = skb;
3864                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3865                                              "at %p\n", bufsz, skb->data);
3866                         /* Try again, without freeing the previous */
3867                         skb = dev_alloc_skb(bufsz);
3868                         /* Failed allocation, critical failure */
3869                         if (!skb) {
3870                                 dev_kfree_skb(oldskb);
3871                                 break;
3872                         }
3873
3874                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3875                                 /* give up */
3876                                 dev_kfree_skb(skb);
3877                                 dev_kfree_skb(oldskb);
3878                                 break; /* while !buffer_info->skb */
3879                         } else {
3880                                 /* Use new allocation */
3881                                 dev_kfree_skb(oldskb);
3882                         }
3883                 }
3884                 /* Make buffer alignment 2 beyond a 16 byte boundary
3885                  * this will result in a 16 byte aligned IP header after
3886                  * the 14 byte MAC header is removed
3887                  */
3888                 skb_reserve(skb, NET_IP_ALIGN);
3889
3890                 skb->dev = netdev;
3891
3892                 buffer_info->skb = skb;
3893                 buffer_info->length = adapter->rx_buffer_len;
3894 map_skb:
3895                 buffer_info->dma = pci_map_single(pdev,
3896                                                   skb->data,
3897                                                   adapter->rx_buffer_len,
3898                                                   PCI_DMA_FROMDEVICE);
3899
3900                 /* Fix for errata 23, can't cross 64kB boundary */
3901                 if (!e1000_check_64k_bound(adapter,
3902                                         (void *)(unsigned long)buffer_info->dma,
3903                                         adapter->rx_buffer_len)) {
3904                         DPRINTK(RX_ERR, ERR,
3905                                 "dma align check failed: %u bytes at %p\n",
3906                                 adapter->rx_buffer_len,
3907                                 (void *)(unsigned long)buffer_info->dma);
3908                         dev_kfree_skb(skb);
3909                         buffer_info->skb = NULL;
3910
3911                         pci_unmap_single(pdev, buffer_info->dma,
3912                                          adapter->rx_buffer_len,
3913                                          PCI_DMA_FROMDEVICE);
3914
3915                         break; /* while !buffer_info->skb */
3916                 }
3917                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3918                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3919
3920                 if (unlikely(++i == rx_ring->count))
3921                         i = 0;
3922                 buffer_info = &rx_ring->buffer_info[i];
3923         }
3924
3925         if (likely(rx_ring->next_to_use != i)) {
3926                 rx_ring->next_to_use = i;
3927                 if (unlikely(i-- == 0))
3928                         i = (rx_ring->count - 1);
3929
3930                 /* Force memory writes to complete before letting h/w
3931                  * know there are new descriptors to fetch.  (Only
3932                  * applicable for weak-ordered memory model archs,
3933                  * such as IA-64). */
3934                 wmb();
3935                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3936         }
3937 }
3938
3939 /**
3940  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3941  * @adapter: address of board private structure
3942  **/
3943
3944 static void
3945 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3946                           struct e1000_rx_ring *rx_ring,
3947                           int cleaned_count)
3948 {
3949         struct net_device *netdev = adapter->netdev;
3950         struct pci_dev *pdev = adapter->pdev;
3951         union e1000_rx_desc_packet_split *rx_desc;
3952         struct e1000_buffer *buffer_info;
3953         struct e1000_ps_page *ps_page;
3954         struct e1000_ps_page_dma *ps_page_dma;
3955         struct sk_buff *skb;
3956         unsigned int i, j;
3957
3958         i = rx_ring->next_to_use;
3959         buffer_info = &rx_ring->buffer_info[i];
3960         ps_page = &rx_ring->ps_page[i];
3961         ps_page_dma = &rx_ring->ps_page_dma[i];
3962
3963         while (cleaned_count--) {
3964                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3965
3966                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
3967                         if (j < adapter->rx_ps_pages) {
3968                                 if (likely(!ps_page->ps_page[j])) {
3969                                         ps_page->ps_page[j] =
3970                                                 alloc_page(GFP_ATOMIC);
3971                                         if (unlikely(!ps_page->ps_page[j])) {
3972                                                 adapter->alloc_rx_buff_failed++;
3973                                                 goto no_buffers;
3974                                         }
3975                                         ps_page_dma->ps_page_dma[j] =
3976                                                 pci_map_page(pdev,
3977                                                             ps_page->ps_page[j],
3978                                                             0, PAGE_SIZE,
3979                                                             PCI_DMA_FROMDEVICE);
3980                                 }
3981                                 /* Refresh the desc even if buffer_addrs didn't
3982                                  * change because each write-back erases
3983                                  * this info.
3984                                  */
3985                                 rx_desc->read.buffer_addr[j+1] =
3986                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3987                         } else
3988                                 rx_desc->read.buffer_addr[j+1] = ~0;
3989                 }
3990
3991                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3992
3993                 if (unlikely(!skb)) {
3994                         adapter->alloc_rx_buff_failed++;
3995                         break;
3996                 }
3997
3998                 /* Make buffer alignment 2 beyond a 16 byte boundary
3999                  * this will result in a 16 byte aligned IP header after
4000                  * the 14 byte MAC header is removed
4001                  */
4002                 skb_reserve(skb, NET_IP_ALIGN);
4003
4004                 skb->dev = netdev;
4005
4006                 buffer_info->skb = skb;
4007                 buffer_info->length = adapter->rx_ps_bsize0;
4008                 buffer_info->dma = pci_map_single(pdev, skb->data,
4009                                                   adapter->rx_ps_bsize0,
4010                                                   PCI_DMA_FROMDEVICE);
4011
4012                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4013
4014                 if (unlikely(++i == rx_ring->count)) i = 0;
4015                 buffer_info = &rx_ring->buffer_info[i];
4016                 ps_page = &rx_ring->ps_page[i];
4017                 ps_page_dma = &rx_ring->ps_page_dma[i];
4018         }
4019
4020 no_buffers:
4021         if (likely(rx_ring->next_to_use != i)) {
4022                 rx_ring->next_to_use = i;
4023                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4024
4025                 /* Force memory writes to complete before letting h/w
4026                  * know there are new descriptors to fetch.  (Only
4027                  * applicable for weak-ordered memory model archs,
4028                  * such as IA-64). */
4029                 wmb();
4030                 /* Hardware increments by 16 bytes, but packet split
4031                  * descriptors are 32 bytes...so we increment tail
4032                  * twice as much.
4033                  */
4034                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4035         }
4036 }
4037
4038 /**
4039  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4040  * @adapter:
4041  **/
4042
4043 static void
4044 e1000_smartspeed(struct e1000_adapter *adapter)
4045 {
4046         uint16_t phy_status;
4047         uint16_t phy_ctrl;
4048
4049         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4050            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4051                 return;
4052
4053         if (adapter->smartspeed == 0) {
4054                 /* If Master/Slave config fault is asserted twice,
4055                  * we assume back-to-back */
4056                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4057                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4058                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4059                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4060                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4061                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4062                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4063                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4064                                             phy_ctrl);
4065                         adapter->smartspeed++;
4066                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4067                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4068                                                &phy_ctrl)) {
4069                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4070                                              MII_CR_RESTART_AUTO_NEG);
4071                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4072                                                     phy_ctrl);
4073                         }
4074                 }
4075                 return;
4076         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4077                 /* If still no link, perhaps using 2/3 pair cable */
4078                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4079                 phy_ctrl |= CR_1000T_MS_ENABLE;
4080                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4081                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4082                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4083                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4084                                      MII_CR_RESTART_AUTO_NEG);
4085                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4086                 }
4087         }
4088         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4089         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4090                 adapter->smartspeed = 0;
4091 }
4092
4093 /**
4094  * e1000_ioctl -
4095  * @netdev:
4096  * @ifreq:
4097  * @cmd:
4098  **/
4099
4100 static int
4101 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4102 {
4103         switch (cmd) {
4104         case SIOCGMIIPHY:
4105         case SIOCGMIIREG:
4106         case SIOCSMIIREG:
4107                 return e1000_mii_ioctl(netdev, ifr, cmd);
4108         default:
4109                 return -EOPNOTSUPP;
4110         }
4111 }
4112
4113 /**
4114  * e1000_mii_ioctl -
4115  * @netdev:
4116  * @ifreq:
4117  * @cmd:
4118  **/
4119
4120 static int
4121 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4122 {
4123         struct e1000_adapter *adapter = netdev_priv(netdev);
4124         struct mii_ioctl_data *data = if_mii(ifr);
4125         int retval;
4126         uint16_t mii_reg;
4127         uint16_t spddplx;
4128         unsigned long flags;
4129
4130         if (adapter->hw.media_type != e1000_media_type_copper)
4131                 return -EOPNOTSUPP;
4132
4133         switch (cmd) {
4134         case SIOCGMIIPHY:
4135                 data->phy_id = adapter->hw.phy_addr;
4136                 break;
4137         case SIOCGMIIREG:
4138                 if (!capable(CAP_NET_ADMIN))
4139                         return -EPERM;
4140                 spin_lock_irqsave(&adapter->stats_lock, flags);
4141                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4142                                    &data->val_out)) {
4143                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4144                         return -EIO;
4145                 }
4146                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4147                 break;
4148         case SIOCSMIIREG:
4149                 if (!capable(CAP_NET_ADMIN))
4150                         return -EPERM;
4151                 if (data->reg_num & ~(0x1F))
4152                         return -EFAULT;
4153                 mii_reg = data->val_in;
4154                 spin_lock_irqsave(&adapter->stats_lock, flags);
4155                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4156                                         mii_reg)) {
4157                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4158                         return -EIO;
4159                 }
4160                 if (adapter->hw.phy_type == e1000_media_type_copper) {
4161                         switch (data->reg_num) {
4162                         case PHY_CTRL:
4163                                 if (mii_reg & MII_CR_POWER_DOWN)
4164                                         break;
4165                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4166                                         adapter->hw.autoneg = 1;
4167                                         adapter->hw.autoneg_advertised = 0x2F;
4168                                 } else {
4169                                         if (mii_reg & 0x40)
4170                                                 spddplx = SPEED_1000;
4171                                         else if (mii_reg & 0x2000)
4172                                                 spddplx = SPEED_100;
4173                                         else
4174                                                 spddplx = SPEED_10;
4175                                         spddplx += (mii_reg & 0x100)
4176                                                    ? DUPLEX_FULL :
4177                                                    DUPLEX_HALF;
4178                                         retval = e1000_set_spd_dplx(adapter,
4179                                                                     spddplx);
4180                                         if (retval) {
4181                                                 spin_unlock_irqrestore(
4182                                                         &adapter->stats_lock,
4183                                                         flags);
4184                                                 return retval;
4185                                         }
4186                                 }
4187                                 if (netif_running(adapter->netdev)) {
4188                                         e1000_down(adapter);
4189                                         e1000_up(adapter);
4190                                 } else
4191                                         e1000_reset(adapter);
4192                                 break;
4193                         case M88E1000_PHY_SPEC_CTRL:
4194                         case M88E1000_EXT_PHY_SPEC_CTRL:
4195                                 if (e1000_phy_reset(&adapter->hw)) {
4196                                         spin_unlock_irqrestore(
4197                                                 &adapter->stats_lock, flags);
4198                                         return -EIO;
4199                                 }
4200                                 break;
4201                         }
4202                 } else {
4203                         switch (data->reg_num) {
4204                         case PHY_CTRL:
4205                                 if (mii_reg & MII_CR_POWER_DOWN)
4206                                         break;
4207                                 if (netif_running(adapter->netdev)) {
4208                                         e1000_down(adapter);
4209                                         e1000_up(adapter);
4210                                 } else
4211                                         e1000_reset(adapter);
4212                                 break;
4213                         }
4214                 }
4215                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4216                 break;
4217         default:
4218                 return -EOPNOTSUPP;
4219         }
4220         return E1000_SUCCESS;
4221 }
4222
4223 void
4224 e1000_pci_set_mwi(struct e1000_hw *hw)
4225 {
4226         struct e1000_adapter *adapter = hw->back;
4227         int ret_val = pci_set_mwi(adapter->pdev);
4228
4229         if (ret_val)
4230                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4231 }
4232
4233 void
4234 e1000_pci_clear_mwi(struct e1000_hw *hw)
4235 {
4236         struct e1000_adapter *adapter = hw->back;
4237
4238         pci_clear_mwi(adapter->pdev);
4239 }
4240
4241 void
4242 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4243 {
4244         struct e1000_adapter *adapter = hw->back;
4245
4246         pci_read_config_word(adapter->pdev, reg, value);
4247 }
4248
4249 void
4250 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4251 {
4252         struct e1000_adapter *adapter = hw->back;
4253
4254         pci_write_config_word(adapter->pdev, reg, *value);
4255 }
4256
4257 uint32_t
4258 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4259 {
4260         return inl(port);
4261 }
4262
4263 void
4264 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4265 {
4266         outl(value, port);
4267 }
4268
4269 static void
4270 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4271 {
4272         struct e1000_adapter *adapter = netdev_priv(netdev);
4273         uint32_t ctrl, rctl;
4274
4275         e1000_irq_disable(adapter);
4276         adapter->vlgrp = grp;
4277
4278         if (grp) {
4279                 /* enable VLAN tag insert/strip */
4280                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4281                 ctrl |= E1000_CTRL_VME;
4282                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4283
4284                 /* enable VLAN receive filtering */
4285                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4286                 rctl |= E1000_RCTL_VFE;
4287                 rctl &= ~E1000_RCTL_CFIEN;
4288                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4289                 e1000_update_mng_vlan(adapter);
4290         } else {
4291                 /* disable VLAN tag insert/strip */
4292                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4293                 ctrl &= ~E1000_CTRL_VME;
4294                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4295
4296                 /* disable VLAN filtering */
4297                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4298                 rctl &= ~E1000_RCTL_VFE;
4299                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4300                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4301                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4302                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4303                 }
4304         }
4305
4306         e1000_irq_enable(adapter);
4307 }
4308
4309 static void
4310 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4311 {
4312         struct e1000_adapter *adapter = netdev_priv(netdev);
4313         uint32_t vfta, index;
4314
4315         if ((adapter->hw.mng_cookie.status &
4316              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4317             (vid == adapter->mng_vlan_id))
4318                 return;
4319         /* add VID to filter table */
4320         index = (vid >> 5) & 0x7F;
4321         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4322         vfta |= (1 << (vid & 0x1F));
4323         e1000_write_vfta(&adapter->hw, index, vfta);
4324 }
4325
4326 static void
4327 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4328 {
4329         struct e1000_adapter *adapter = netdev_priv(netdev);
4330         uint32_t vfta, index;
4331
4332         e1000_irq_disable(adapter);
4333
4334         if (adapter->vlgrp)
4335                 adapter->vlgrp->vlan_devices[vid] = NULL;
4336
4337         e1000_irq_enable(adapter);
4338
4339         if ((adapter->hw.mng_cookie.status &
4340              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4341             (vid == adapter->mng_vlan_id)) {
4342                 /* release control to f/w */
4343                 e1000_release_hw_control(adapter);
4344                 return;
4345         }
4346
4347         /* remove VID from filter table */
4348         index = (vid >> 5) & 0x7F;
4349         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4350         vfta &= ~(1 << (vid & 0x1F));
4351         e1000_write_vfta(&adapter->hw, index, vfta);
4352 }
4353
4354 static void
4355 e1000_restore_vlan(struct e1000_adapter *adapter)
4356 {
4357         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4358
4359         if (adapter->vlgrp) {
4360                 uint16_t vid;
4361                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4362                         if (!adapter->vlgrp->vlan_devices[vid])
4363                                 continue;
4364                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4365                 }
4366         }
4367 }
4368
4369 int
4370 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4371 {
4372         adapter->hw.autoneg = 0;
4373
4374         /* Fiber NICs only allow 1000 gbps Full duplex */
4375         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4376                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4377                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4378                 return -EINVAL;
4379         }
4380
4381         switch (spddplx) {
4382         case SPEED_10 + DUPLEX_HALF:
4383                 adapter->hw.forced_speed_duplex = e1000_10_half;
4384                 break;
4385         case SPEED_10 + DUPLEX_FULL:
4386                 adapter->hw.forced_speed_duplex = e1000_10_full;
4387                 break;
4388         case SPEED_100 + DUPLEX_HALF:
4389                 adapter->hw.forced_speed_duplex = e1000_100_half;
4390                 break;
4391         case SPEED_100 + DUPLEX_FULL:
4392                 adapter->hw.forced_speed_duplex = e1000_100_full;
4393                 break;
4394         case SPEED_1000 + DUPLEX_FULL:
4395                 adapter->hw.autoneg = 1;
4396                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4397                 break;
4398         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4399         default:
4400                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4401                 return -EINVAL;
4402         }
4403         return 0;
4404 }
4405
4406 #ifdef CONFIG_PM
4407 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4408  * bus we're on (PCI(X) vs. PCI-E)
4409  */
4410 #define PCIE_CONFIG_SPACE_LEN 256
4411 #define PCI_CONFIG_SPACE_LEN 64
4412 static int
4413 e1000_pci_save_state(struct e1000_adapter *adapter)
4414 {
4415         struct pci_dev *dev = adapter->pdev;
4416         int size;
4417         int i;
4418
4419         if (adapter->hw.mac_type >= e1000_82571)
4420                 size = PCIE_CONFIG_SPACE_LEN;
4421         else
4422                 size = PCI_CONFIG_SPACE_LEN;
4423
4424         WARN_ON(adapter->config_space != NULL);
4425
4426         adapter->config_space = kmalloc(size, GFP_KERNEL);
4427         if (!adapter->config_space) {
4428                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4429                 return -ENOMEM;
4430         }
4431         for (i = 0; i < (size / 4); i++)
4432                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4433         return 0;
4434 }
4435
4436 static void
4437 e1000_pci_restore_state(struct e1000_adapter *adapter)
4438 {
4439         struct pci_dev *dev = adapter->pdev;
4440         int size;
4441         int i;
4442
4443         if (adapter->config_space == NULL)
4444                 return;
4445
4446         if (adapter->hw.mac_type >= e1000_82571)
4447                 size = PCIE_CONFIG_SPACE_LEN;
4448         else
4449                 size = PCI_CONFIG_SPACE_LEN;
4450         for (i = 0; i < (size / 4); i++)
4451                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4452         kfree(adapter->config_space);
4453         adapter->config_space = NULL;
4454         return;
4455 }
4456 #endif /* CONFIG_PM */
4457
4458 static int
4459 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4460 {
4461         struct net_device *netdev = pci_get_drvdata(pdev);
4462         struct e1000_adapter *adapter = netdev_priv(netdev);
4463         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4464         uint32_t wufc = adapter->wol;
4465         int retval = 0;
4466
4467         netif_device_detach(netdev);
4468
4469         if (netif_running(netdev))
4470                 e1000_down(adapter);
4471
4472 #ifdef CONFIG_PM
4473         /* Implement our own version of pci_save_state(pdev) because pci-
4474          * express adapters have 256-byte config spaces. */
4475         retval = e1000_pci_save_state(adapter);
4476         if (retval)
4477                 return retval;
4478 #endif
4479
4480         status = E1000_READ_REG(&adapter->hw, STATUS);
4481         if (status & E1000_STATUS_LU)
4482                 wufc &= ~E1000_WUFC_LNKC;
4483
4484         if (wufc) {
4485                 e1000_setup_rctl(adapter);
4486                 e1000_set_multi(netdev);
4487
4488                 /* turn on all-multi mode if wake on multicast is enabled */
4489                 if (adapter->wol & E1000_WUFC_MC) {
4490                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4491                         rctl |= E1000_RCTL_MPE;
4492                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4493                 }
4494
4495                 if (adapter->hw.mac_type >= e1000_82540) {
4496                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4497                         /* advertise wake from D3Cold */
4498                         #define E1000_CTRL_ADVD3WUC 0x00100000
4499                         /* phy power management enable */
4500                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4501                         ctrl |= E1000_CTRL_ADVD3WUC |
4502                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4503                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4504                 }
4505
4506                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4507                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4508                         /* keep the laser running in D3 */
4509                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4510                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4511                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4512                 }
4513
4514                 /* Allow time for pending master requests to run */
4515                 e1000_disable_pciex_master(&adapter->hw);
4516
4517                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4518                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4519                 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4520                 if (retval)
4521                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4522                 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4523                 if (retval)
4524                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4525         } else {
4526                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4527                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4528                 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4529                 if (retval)
4530                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4531                 retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4532                 if (retval)
4533                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4534         }
4535
4536         if (adapter->hw.mac_type >= e1000_82540 &&
4537            adapter->hw.media_type == e1000_media_type_copper) {
4538                 manc = E1000_READ_REG(&adapter->hw, MANC);
4539                 if (manc & E1000_MANC_SMBUS_EN) {
4540                         manc |= E1000_MANC_ARP_EN;
4541                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4542                         retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4543                         if (retval)
4544                                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4545                         retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4546                         if (retval)
4547                                 DPRINTK(PROBE, ERR,
4548                                         "Error enabling D3 cold wake\n");
4549                 }
4550         }
4551
4552         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4553          * would have already happened in close and is redundant. */
4554         e1000_release_hw_control(adapter);
4555
4556         pci_disable_device(pdev);
4557
4558         retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4559         if (retval)
4560                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4561
4562         return 0;
4563 }
4564
4565 #ifdef CONFIG_PM
4566 static int
4567 e1000_resume(struct pci_dev *pdev)
4568 {
4569         struct net_device *netdev = pci_get_drvdata(pdev);
4570         struct e1000_adapter *adapter = netdev_priv(netdev);
4571         int retval;
4572         uint32_t manc, ret_val;
4573
4574         retval = pci_set_power_state(pdev, PCI_D0);
4575         if (retval)
4576                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4577         e1000_pci_restore_state(adapter);
4578         ret_val = pci_enable_device(pdev);
4579         pci_set_master(pdev);
4580
4581         retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4582         if (retval)
4583                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4584         retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4585         if (retval)
4586                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4587
4588         e1000_reset(adapter);
4589         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4590
4591         if (netif_running(netdev))
4592                 e1000_up(adapter);
4593
4594         netif_device_attach(netdev);
4595
4596         if (adapter->hw.mac_type >= e1000_82540 &&
4597            adapter->hw.media_type == e1000_media_type_copper) {
4598                 manc = E1000_READ_REG(&adapter->hw, MANC);
4599                 manc &= ~(E1000_MANC_ARP_EN);
4600                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4601         }
4602
4603         /* If the controller is 82573 and f/w is AMT, do not set
4604          * DRV_LOAD until the interface is up.  For all other cases,
4605          * let the f/w know that the h/w is now under the control
4606          * of the driver. */
4607         if (adapter->hw.mac_type != e1000_82573 ||
4608             !e1000_check_mng_mode(&adapter->hw))
4609                 e1000_get_hw_control(adapter);
4610
4611         return 0;
4612 }
4613 #endif
4614 #ifdef CONFIG_NET_POLL_CONTROLLER
4615 /*
4616  * Polling 'interrupt' - used by things like netconsole to send skbs
4617  * without having to re-enable interrupts. It's not called while
4618  * the interrupt routine is executing.
4619  */
4620 static void
4621 e1000_netpoll(struct net_device *netdev)
4622 {
4623         struct e1000_adapter *adapter = netdev_priv(netdev);
4624         disable_irq(adapter->pdev->irq);
4625         e1000_intr(adapter->pdev->irq, netdev, NULL);
4626         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4627 #ifndef CONFIG_E1000_NAPI
4628         adapter->clean_rx(adapter, adapter->rx_ring);
4629 #endif
4630         enable_irq(adapter->pdev->irq);
4631 }
4632 #endif
4633
4634 /* e1000_main.c */