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  * 6.0.58       4/20/05
  33  *   o Accepted ethtool cleanup patch from Stephen Hemminger
  34  * 6.0.44+      2/15/05
  35  *   o applied Anton's patch to resolve tx hang in hardware
  36  *   o Applied Andrew Mortons patch - e1000 stops working after resume
  37  */
  38
  39 char e1000_driver_name[] = "e1000";
  40 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  41 #ifndef CONFIG_E1000_NAPI
  42 #define DRIVERNAPI
  43 #else
  44 #define DRIVERNAPI "-NAPI"
  45 #endif
  46 #define DRV_VERSION "6.3.9-k2"DRIVERNAPI
  47 char e1000_driver_version[] = DRV_VERSION;
  48 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
  49
  50 /* e1000_pci_tbl - PCI Device ID Table
  51  *
  52  * Last entry must be all 0s
  53  *
  54  * Macro expands to...
  55  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  56  */
  57 static struct pci_device_id e1000_pci_tbl[] = {
  58         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  65         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  66         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  78         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  79         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  83         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  84         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  88         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  89         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  94         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  95         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  96         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  97         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  98         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  99         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 100         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 101         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 102         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 103         /* required last entry */
 104         {0,}
 105 };
 106
 107 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 108
 109 int e1000_up(struct e1000_adapter *adapter);
 110 void e1000_down(struct e1000_adapter *adapter);
 111 void e1000_reset(struct e1000_adapter *adapter);
 112 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 113 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 114 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 115 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 116 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 117 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 118                                     struct e1000_tx_ring *txdr);
 119 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 120                                     struct e1000_rx_ring *rxdr);
 121 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 122                                     struct e1000_tx_ring *tx_ring);
 123 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 124                                     struct e1000_rx_ring *rx_ring);
 125 void e1000_update_stats(struct e1000_adapter *adapter);
 126
 127 /* Local Function Prototypes */
 128
 129 static int e1000_init_module(void);
 130 static void e1000_exit_module(void);
 131 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 132 static void __devexit e1000_remove(struct pci_dev *pdev);
 133 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 134 #ifdef CONFIG_E1000_MQ
 135 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
 136 #endif
 137 static int e1000_sw_init(struct e1000_adapter *adapter);
 138 static int e1000_open(struct net_device *netdev);
 139 static int e1000_close(struct net_device *netdev);
 140 static void e1000_configure_tx(struct e1000_adapter *adapter);
 141 static void e1000_configure_rx(struct e1000_adapter *adapter);
 142 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 143 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 144 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 145 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 146                                 struct e1000_tx_ring *tx_ring);
 147 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 148                                 struct e1000_rx_ring *rx_ring);
 149 static void e1000_set_multi(struct net_device *netdev);
 150 static void e1000_update_phy_info(unsigned long data);
 151 static void e1000_watchdog(unsigned long data);
 152 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 153 static void e1000_82547_tx_fifo_stall(unsigned long data);
 154 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 155 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 156 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 157 static int e1000_set_mac(struct net_device *netdev, void *p);
 158 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 159 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 160                                     struct e1000_tx_ring *tx_ring);
 161 #ifdef CONFIG_E1000_NAPI
 162 static int e1000_clean(struct net_device *poll_dev, int *budget);
 163 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 164                                     struct e1000_rx_ring *rx_ring,
 165                                     int *work_done, int work_to_do);
 166 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 167                                        struct e1000_rx_ring *rx_ring,
 168                                        int *work_done, int work_to_do);
 169 #else
 170 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 171                                     struct e1000_rx_ring *rx_ring);
 172 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 173                                        struct e1000_rx_ring *rx_ring);
 174 #endif
 175 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 176                                    struct e1000_rx_ring *rx_ring,
 177                                    int cleaned_count);
 178 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 179                                       struct e1000_rx_ring *rx_ring,
 180                                       int cleaned_count);
 181 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 182 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 183                            int cmd);
 184 void e1000_set_ethtool_ops(struct net_device *netdev);
 185 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 186 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 187 static void e1000_tx_timeout(struct net_device *dev);
 188 static void e1000_tx_timeout_task(struct net_device *dev);
 189 static void e1000_smartspeed(struct e1000_adapter *adapter);
 190 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 191                                               struct sk_buff *skb);
 192
 193 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 194 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 195 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 196 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 197
 198 #ifdef CONFIG_PM
 199 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 200 static int e1000_resume(struct pci_dev *pdev);
 201 #endif
 202
 203 #ifdef CONFIG_NET_POLL_CONTROLLER
 204 /* for netdump / net console */
 205 static void e1000_netpoll (struct net_device *netdev);
 206 #endif
 207
 208 #ifdef CONFIG_E1000_MQ
 209 /* for multiple Rx queues */
 210 void e1000_rx_schedule(void *data);
 211 #endif
 212
 213 /* Exported from other modules */
 214
 215 extern void e1000_check_options(struct e1000_adapter *adapter);
 216
 217 static struct pci_driver e1000_driver = {
 218         .name     = e1000_driver_name,
 219         .id_table = e1000_pci_tbl,
 220         .probe    = e1000_probe,
 221         .remove   = __devexit_p(e1000_remove),
 222         /* Power Managment Hooks */
 223 #ifdef CONFIG_PM
 224         .suspend  = e1000_suspend,
 225         .resume   = e1000_resume
 226 #endif
 227 };
 228
 229 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 230 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 231 MODULE_LICENSE("GPL");
 232 MODULE_VERSION(DRV_VERSION);
 233
 234 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 235 module_param(debug, int, 0);
 236 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 237
 238 /**
 239  * e1000_init_module - Driver Registration Routine
 240  *
 241  * e1000_init_module is the first routine called when the driver is
 242  * loaded. All it does is register with the PCI subsystem.
 243  **/
 244
 245 static int __init
 246 e1000_init_module(void)
 247 {
 248         int ret;
 249         printk(KERN_INFO "%s - version %s\n",
 250                e1000_driver_string, e1000_driver_version);
 251
 252         printk(KERN_INFO "%s\n", e1000_copyright);
 253
 254         ret = pci_module_init(&e1000_driver);
 255
 256         return ret;
 257 }
 258
 259 module_init(e1000_init_module);
 260
 261 /**
 262  * e1000_exit_module - Driver Exit Cleanup Routine
 263  *
 264  * e1000_exit_module is called just before the driver is removed
 265  * from memory.
 266  **/
 267
 268 static void __exit
 269 e1000_exit_module(void)
 270 {
 271         pci_unregister_driver(&e1000_driver);
 272 }
 273
 274 module_exit(e1000_exit_module);
 275
 276 /**
 277  * e1000_irq_disable - Mask off interrupt generation on the NIC
 278  * @adapter: board private structure
 279  **/
 280
 281 static inline void
 282 e1000_irq_disable(struct e1000_adapter *adapter)
 283 {
 284         atomic_inc(&adapter->irq_sem);
 285         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 286         E1000_WRITE_FLUSH(&adapter->hw);
 287         synchronize_irq(adapter->pdev->irq);
 288 }
 289
 290 /**
 291  * e1000_irq_enable - Enable default interrupt generation settings
 292  * @adapter: board private structure
 293  **/
 294
 295 static inline void
 296 e1000_irq_enable(struct e1000_adapter *adapter)
 297 {
 298         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 299                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 300                 E1000_WRITE_FLUSH(&adapter->hw);
 301         }
 302 }
 303
 304 static void
 305 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 306 {
 307         struct net_device *netdev = adapter->netdev;
 308         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 309         uint16_t old_vid = adapter->mng_vlan_id;
 310         if(adapter->vlgrp) {
 311                 if(!adapter->vlgrp->vlan_devices[vid]) {
 312                         if(adapter->hw.mng_cookie.status &
 313                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 314                                 e1000_vlan_rx_add_vid(netdev, vid);
 315                                 adapter->mng_vlan_id = vid;
 316                         } else
 317                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 318
 319                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 320                                         (vid != old_vid) &&
 321                                         !adapter->vlgrp->vlan_devices[old_vid])
 322                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 323                 }
 324         }
 325 }
 326
 327 /**
 328  * e1000_release_hw_control - release control of the h/w to f/w
 329  * @adapter: address of board private structure
 330  *
 331  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 332  * For ASF and Pass Through versions of f/w this means that the
 333  * driver is no longer loaded. For AMT version (only with 82573) i
 334  * of the f/w this means that the netowrk i/f is closed.
 335  *
 336  **/
 337
 338 static inline void
 339 e1000_release_hw_control(struct e1000_adapter *adapter)
 340 {
 341         uint32_t ctrl_ext;
 342         uint32_t swsm;
 343
 344         /* Let firmware taken over control of h/w */
 345         switch (adapter->hw.mac_type) {
 346         case e1000_82571:
 347         case e1000_82572:
 348                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 349                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 350                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 351                 break;
 352         case e1000_82573:
 353                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 354                 E1000_WRITE_REG(&adapter->hw, SWSM,
 355                                 swsm & ~E1000_SWSM_DRV_LOAD);
 356         default:
 357                 break;
 358         }
 359 }
 360
 361 /**
 362  * e1000_get_hw_control - get control of the h/w from f/w
 363  * @adapter: address of board private structure
 364  *
 365  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 366  * For ASF and Pass Through versions of f/w this means that
 367  * the driver is loaded. For AMT version (only with 82573)
 368  * of the f/w this means that the netowrk i/f is open.
 369  *
 370  **/
 371
 372 static inline void
 373 e1000_get_hw_control(struct e1000_adapter *adapter)
 374 {
 375         uint32_t ctrl_ext;
 376         uint32_t swsm;
 377         /* Let firmware know the driver has taken over */
 378         switch (adapter->hw.mac_type) {
 379         case e1000_82571:
 380         case e1000_82572:
 381                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 382                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 383                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 384                 break;
 385         case e1000_82573:
 386                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 387                 E1000_WRITE_REG(&adapter->hw, SWSM,
 388                                 swsm | E1000_SWSM_DRV_LOAD);
 389                 break;
 390         default:
 391                 break;
 392         }
 393 }
 394
 395 int
 396 e1000_up(struct e1000_adapter *adapter)
 397 {
 398         struct net_device *netdev = adapter->netdev;
 399         int i, err;
 400
 401         /* hardware has been reset, we need to reload some things */
 402
 403         /* Reset the PHY if it was previously powered down */
 404         if(adapter->hw.media_type == e1000_media_type_copper) {
 405                 uint16_t mii_reg;
 406                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 407                 if(mii_reg & MII_CR_POWER_DOWN)
 408                         e1000_phy_reset(&adapter->hw);
 409         }
 410
 411         e1000_set_multi(netdev);
 412
 413         e1000_restore_vlan(adapter);
 414
 415         e1000_configure_tx(adapter);
 416         e1000_setup_rctl(adapter);
 417         e1000_configure_rx(adapter);
 418         /* call E1000_DESC_UNUSED which always leaves
 419          * at least 1 descriptor unused to make sure
 420          * next_to_use != next_to_clean */
 421         for (i = 0; i < adapter->num_rx_queues; i++) {
 422                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 423                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
 424         }
 425
 426 #ifdef CONFIG_PCI_MSI
 427         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 428                 adapter->have_msi = TRUE;
 429                 if((err = pci_enable_msi(adapter->pdev))) {
 430                         DPRINTK(PROBE, ERR,
 431                          "Unable to allocate MSI interrupt Error: %d\n", err);
 432                         adapter->have_msi = FALSE;
 433                 }
 434         }
 435 #endif
 436         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 437                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 438                               netdev->name, netdev))) {
 439                 DPRINTK(PROBE, ERR,
 440                     "Unable to allocate interrupt Error: %d\n", err);
 441                 return err;
 442         }
 443
 444 #ifdef CONFIG_E1000_MQ
 445         e1000_setup_queue_mapping(adapter);
 446 #endif
 447
 448         adapter->tx_queue_len = netdev->tx_queue_len;
 449
 450         mod_timer(&adapter->watchdog_timer, jiffies);
 451
 452 #ifdef CONFIG_E1000_NAPI
 453         netif_poll_enable(netdev);
 454 #endif
 455         e1000_irq_enable(adapter);
 456
 457         return 0;
 458 }
 459
 460 void
 461 e1000_down(struct e1000_adapter *adapter)
 462 {
 463         struct net_device *netdev = adapter->netdev;
 464         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 465                                      e1000_check_mng_mode(&adapter->hw);
 466
 467         e1000_irq_disable(adapter);
 468 #ifdef CONFIG_E1000_MQ
 469         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 470 #endif
 471         free_irq(adapter->pdev->irq, netdev);
 472 #ifdef CONFIG_PCI_MSI
 473         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 474            adapter->have_msi == TRUE)
 475                 pci_disable_msi(adapter->pdev);
 476 #endif
 477         del_timer_sync(&adapter->tx_fifo_stall_timer);
 478         del_timer_sync(&adapter->watchdog_timer);
 479         del_timer_sync(&adapter->phy_info_timer);
 480
 481 #ifdef CONFIG_E1000_NAPI
 482         netif_poll_disable(netdev);
 483 #endif
 484         netdev->tx_queue_len = adapter->tx_queue_len;
 485         adapter->link_speed = 0;
 486         adapter->link_duplex = 0;
 487         netif_carrier_off(netdev);
 488         netif_stop_queue(netdev);
 489
 490         e1000_reset(adapter);
 491         e1000_clean_all_tx_rings(adapter);
 492         e1000_clean_all_rx_rings(adapter);
 493
 494         /* Power down the PHY so no link is implied when interface is down *
 495          * The PHY cannot be powered down if any of the following is TRUE *
 496          * (a) WoL is enabled
 497          * (b) AMT is active
 498          * (c) SoL/IDER session is active */
 499         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 500            adapter->hw.media_type == e1000_media_type_copper &&
 501            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 502            !mng_mode_enabled &&
 503            !e1000_check_phy_reset_block(&adapter->hw)) {
 504                 uint16_t mii_reg;
 505                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 506                 mii_reg |= MII_CR_POWER_DOWN;
 507                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 508                 mdelay(1);
 509         }
 510 }
 511
 512 void
 513 e1000_reset(struct e1000_adapter *adapter)
 514 {
 515         uint32_t pba, manc;
 516         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 517
 518         /* Repartition Pba for greater than 9k mtu
 519          * To take effect CTRL.RST is required.
 520          */
 521
 522         switch (adapter->hw.mac_type) {
 523         case e1000_82547:
 524         case e1000_82547_rev_2:
 525                 pba = E1000_PBA_30K;
 526                 break;
 527         case e1000_82571:
 528         case e1000_82572:
 529                 pba = E1000_PBA_38K;
 530                 break;
 531         case e1000_82573:
 532                 pba = E1000_PBA_12K;
 533                 break;
 534         default:
 535                 pba = E1000_PBA_48K;
 536                 break;
 537         }
 538
 539         if((adapter->hw.mac_type != e1000_82573) &&
 540            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 541                 pba -= 8; /* allocate more FIFO for Tx */
 542
 543
 544         if(adapter->hw.mac_type == e1000_82547) {
 545                 adapter->tx_fifo_head = 0;
 546                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 547                 adapter->tx_fifo_size =
 548                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 549                 atomic_set(&adapter->tx_fifo_stall, 0);
 550         }
 551
 552         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 553
 554         /* flow control settings */
 555         /* Set the FC high water mark to 90% of the FIFO size.
 556          * Required to clear last 3 LSB */
 557         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 558
 559         adapter->hw.fc_high_water = fc_high_water_mark;
 560         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 561         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 562         adapter->hw.fc_send_xon = 1;
 563         adapter->hw.fc = adapter->hw.original_fc;
 564
 565         /* Allow time for pending master requests to run */
 566         e1000_reset_hw(&adapter->hw);
 567         if(adapter->hw.mac_type >= e1000_82544)
 568                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 569         if(e1000_init_hw(&adapter->hw))
 570                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 571         e1000_update_mng_vlan(adapter);
 572         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 573         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 574
 575         e1000_reset_adaptive(&adapter->hw);
 576         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 577         if (adapter->en_mng_pt) {
 578                 manc = E1000_READ_REG(&adapter->hw, MANC);
 579                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 580                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 581         }
 582 }
 583
 584 /**
 585  * e1000_probe - Device Initialization Routine
 586  * @pdev: PCI device information struct
 587  * @ent: entry in e1000_pci_tbl
 588  *
 589  * Returns 0 on success, negative on failure
 590  *
 591  * e1000_probe initializes an adapter identified by a pci_dev structure.
 592  * The OS initialization, configuring of the adapter private structure,
 593  * and a hardware reset occur.
 594  **/
 595
 596 static int __devinit
 597 e1000_probe(struct pci_dev *pdev,
 598             const struct pci_device_id *ent)
 599 {
 600         struct net_device *netdev;
 601         struct e1000_adapter *adapter;
 602         unsigned long mmio_start, mmio_len;
 603
 604         static int cards_found = 0;
 605         int i, err, pci_using_dac;
 606         uint16_t eeprom_data;
 607         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 608         if((err = pci_enable_device(pdev)))
 609                 return err;
 610
 611         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 612                 pci_using_dac = 1;
 613         } else {
 614                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 615                         E1000_ERR("No usable DMA configuration, aborting\n");
 616                         return err;
 617                 }
 618                 pci_using_dac = 0;
 619         }
 620
 621         if((err = pci_request_regions(pdev, e1000_driver_name)))
 622                 return err;
 623
 624         pci_set_master(pdev);
 625
 626         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 627         if(!netdev) {
 628                 err = -ENOMEM;
 629                 goto err_alloc_etherdev;
 630         }
 631
 632         SET_MODULE_OWNER(netdev);
 633         SET_NETDEV_DEV(netdev, &pdev->dev);
 634
 635         pci_set_drvdata(pdev, netdev);
 636         adapter = netdev_priv(netdev);
 637         adapter->netdev = netdev;
 638         adapter->pdev = pdev;
 639         adapter->hw.back = adapter;
 640         adapter->msg_enable = (1 << debug) - 1;
 641
 642         mmio_start = pci_resource_start(pdev, BAR_0);
 643         mmio_len = pci_resource_len(pdev, BAR_0);
 644
 645         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 646         if(!adapter->hw.hw_addr) {
 647                 err = -EIO;
 648                 goto err_ioremap;
 649         }
 650
 651         for(i = BAR_1; i <= BAR_5; i++) {
 652                 if(pci_resource_len(pdev, i) == 0)
 653                         continue;
 654                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 655                         adapter->hw.io_base = pci_resource_start(pdev, i);
 656                         break;
 657                 }
 658         }
 659
 660         netdev->open = &e1000_open;
 661         netdev->stop = &e1000_close;
 662         netdev->hard_start_xmit = &e1000_xmit_frame;
 663         netdev->get_stats = &e1000_get_stats;
 664         netdev->set_multicast_list = &e1000_set_multi;
 665         netdev->set_mac_address = &e1000_set_mac;
 666         netdev->change_mtu = &e1000_change_mtu;
 667         netdev->do_ioctl = &e1000_ioctl;
 668         e1000_set_ethtool_ops(netdev);
 669         netdev->tx_timeout = &e1000_tx_timeout;
 670         netdev->watchdog_timeo = 5 * HZ;
 671 #ifdef CONFIG_E1000_NAPI
 672         netdev->poll = &e1000_clean;
 673         netdev->weight = 64;
 674 #endif
 675         netdev->vlan_rx_register = e1000_vlan_rx_register;
 676         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 677         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 678 #ifdef CONFIG_NET_POLL_CONTROLLER
 679         netdev->poll_controller = e1000_netpoll;
 680 #endif
 681         strcpy(netdev->name, pci_name(pdev));
 682
 683         netdev->mem_start = mmio_start;
 684         netdev->mem_end = mmio_start + mmio_len;
 685         netdev->base_addr = adapter->hw.io_base;
 686
 687         adapter->bd_number = cards_found;
 688
 689         /* setup the private structure */
 690
 691         if((err = e1000_sw_init(adapter)))
 692                 goto err_sw_init;
 693
 694         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 695                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 696
 697         if(adapter->hw.mac_type >= e1000_82543) {
 698                 netdev->features = NETIF_F_SG |
 699                                    NETIF_F_HW_CSUM |
 700                                    NETIF_F_HW_VLAN_TX |
 701                                    NETIF_F_HW_VLAN_RX |
 702                                    NETIF_F_HW_VLAN_FILTER;
 703         }
 704
 705 #ifdef NETIF_F_TSO
 706         if((adapter->hw.mac_type >= e1000_82544) &&
 707            (adapter->hw.mac_type != e1000_82547))
 708                 netdev->features |= NETIF_F_TSO;
 709
 710 #ifdef NETIF_F_TSO_IPV6
 711         if(adapter->hw.mac_type > e1000_82547_rev_2)
 712                 netdev->features |= NETIF_F_TSO_IPV6;
 713 #endif
 714 #endif
 715         if(pci_using_dac)
 716                 netdev->features |= NETIF_F_HIGHDMA;
 717
 718         /* hard_start_xmit is safe against parallel locking */
 719         netdev->features |= NETIF_F_LLTX;
 720
 721         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 722
 723         /* before reading the EEPROM, reset the controller to
 724          * put the device in a known good starting state */
 725
 726         e1000_reset_hw(&adapter->hw);
 727
 728         /* make sure the EEPROM is good */
 729
 730         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 731                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 732                 err = -EIO;
 733                 goto err_eeprom;
 734         }
 735
 736         /* copy the MAC address out of the EEPROM */
 737
 738         if(e1000_read_mac_addr(&adapter->hw))
 739                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 740         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 741         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 742
 743         if(!is_valid_ether_addr(netdev->perm_addr)) {
 744                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 745                 err = -EIO;
 746                 goto err_eeprom;
 747         }
 748
 749         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 750
 751         e1000_get_bus_info(&adapter->hw);
 752
 753         init_timer(&adapter->tx_fifo_stall_timer);
 754         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 755         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 756
 757         init_timer(&adapter->watchdog_timer);
 758         adapter->watchdog_timer.function = &e1000_watchdog;
 759         adapter->watchdog_timer.data = (unsigned long) adapter;
 760
 761         INIT_WORK(&adapter->watchdog_task,
 762                 (void (*)(void *))e1000_watchdog_task, adapter);
 763
 764         init_timer(&adapter->phy_info_timer);
 765         adapter->phy_info_timer.function = &e1000_update_phy_info;
 766         adapter->phy_info_timer.data = (unsigned long) adapter;
 767
 768         INIT_WORK(&adapter->tx_timeout_task,
 769                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 770
 771         /* we're going to reset, so assume we have no link for now */
 772
 773         netif_carrier_off(netdev);
 774         netif_stop_queue(netdev);
 775
 776         e1000_check_options(adapter);
 777
 778         /* Initial Wake on LAN setting
 779          * If APM wake is enabled in the EEPROM,
 780          * enable the ACPI Magic Packet filter
 781          */
 782
 783         switch(adapter->hw.mac_type) {
 784         case e1000_82542_rev2_0:
 785         case e1000_82542_rev2_1:
 786         case e1000_82543:
 787                 break;
 788         case e1000_82544:
 789                 e1000_read_eeprom(&adapter->hw,
 790                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 791                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 792                 break;
 793         case e1000_82546:
 794         case e1000_82546_rev_3:
 795         case e1000_82571:
 796                 if(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 797                         e1000_read_eeprom(&adapter->hw,
 798                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 799                         break;
 800                 }
 801                 /* Fall Through */
 802         default:
 803                 e1000_read_eeprom(&adapter->hw,
 804                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 805                 break;
 806         }
 807         if(eeprom_data & eeprom_apme_mask)
 808                 adapter->wol |= E1000_WUFC_MAG;
 809
 810         /* print bus type/speed/width info */
 811         {
 812         struct e1000_hw *hw = &adapter->hw;
 813         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 814                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 815                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 816                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 817                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 818                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 819                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 820                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 821                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 822                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 823                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 824                  "32-bit"));
 825         }
 826
 827         for (i = 0; i < 6; i++)
 828                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 829
 830         /* reset the hardware with the new settings */
 831         e1000_reset(adapter);
 832
 833         /* If the controller is 82573 and f/w is AMT, do not set
 834          * DRV_LOAD until the interface is up.  For all other cases,
 835          * let the f/w know that the h/w is now under the control
 836          * of the driver. */
 837         if (adapter->hw.mac_type != e1000_82573 ||
 838             !e1000_check_mng_mode(&adapter->hw))
 839                 e1000_get_hw_control(adapter);
 840
 841         strcpy(netdev->name, "eth%d");
 842         if((err = register_netdev(netdev)))
 843                 goto err_register;
 844
 845         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 846
 847         cards_found++;
 848         return 0;
 849
 850 err_register:
 851 err_sw_init:
 852 err_eeprom:
 853         iounmap(adapter->hw.hw_addr);
 854 err_ioremap:
 855         free_netdev(netdev);
 856 err_alloc_etherdev:
 857         pci_release_regions(pdev);
 858         return err;
 859 }
 860
 861 /**
 862  * e1000_remove - Device Removal Routine
 863  * @pdev: PCI device information struct
 864  *
 865  * e1000_remove is called by the PCI subsystem to alert the driver
 866  * that it should release a PCI device.  The could be caused by a
 867  * Hot-Plug event, or because the driver is going to be removed from
 868  * memory.
 869  **/
 870
 871 static void __devexit
 872 e1000_remove(struct pci_dev *pdev)
 873 {
 874         struct net_device *netdev = pci_get_drvdata(pdev);
 875         struct e1000_adapter *adapter = netdev_priv(netdev);
 876         uint32_t manc;
 877 #ifdef CONFIG_E1000_NAPI
 878         int i;
 879 #endif
 880
 881         flush_scheduled_work();
 882
 883         if(adapter->hw.mac_type >= e1000_82540 &&
 884            adapter->hw.media_type == e1000_media_type_copper) {
 885                 manc = E1000_READ_REG(&adapter->hw, MANC);
 886                 if(manc & E1000_MANC_SMBUS_EN) {
 887                         manc |= E1000_MANC_ARP_EN;
 888                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 889                 }
 890         }
 891
 892         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 893          * would have already happened in close and is redundant. */
 894         e1000_release_hw_control(adapter);
 895
 896         unregister_netdev(netdev);
 897 #ifdef CONFIG_E1000_NAPI
 898         for (i = 0; i < adapter->num_rx_queues; i++)
 899                 __dev_put(&adapter->polling_netdev[i]);
 900 #endif
 901
 902         if(!e1000_check_phy_reset_block(&adapter->hw))
 903                 e1000_phy_hw_reset(&adapter->hw);
 904
 905         kfree(adapter->tx_ring);
 906         kfree(adapter->rx_ring);
 907 #ifdef CONFIG_E1000_NAPI
 908         kfree(adapter->polling_netdev);
 909 #endif
 910
 911         iounmap(adapter->hw.hw_addr);
 912         pci_release_regions(pdev);
 913
 914 #ifdef CONFIG_E1000_MQ
 915         free_percpu(adapter->cpu_netdev);
 916         free_percpu(adapter->cpu_tx_ring);
 917 #endif
 918         free_netdev(netdev);
 919
 920         pci_disable_device(pdev);
 921 }
 922
 923 /**
 924  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 925  * @adapter: board private structure to initialize
 926  *
 927  * e1000_sw_init initializes the Adapter private data structure.
 928  * Fields are initialized based on PCI device information and
 929  * OS network device settings (MTU size).
 930  **/
 931
 932 static int __devinit
 933 e1000_sw_init(struct e1000_adapter *adapter)
 934 {
 935         struct e1000_hw *hw = &adapter->hw;
 936         struct net_device *netdev = adapter->netdev;
 937         struct pci_dev *pdev = adapter->pdev;
 938 #ifdef CONFIG_E1000_NAPI
 939         int i;
 940 #endif
 941
 942         /* PCI config space info */
 943
 944         hw->vendor_id = pdev->vendor;
 945         hw->device_id = pdev->device;
 946         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 947         hw->subsystem_id = pdev->subsystem_device;
 948
 949         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 950
 951         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 952
 953         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 954         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 955         hw->max_frame_size = netdev->mtu +
 956                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 957         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 958
 959         /* identify the MAC */
 960
 961         if(e1000_set_mac_type(hw)) {
 962                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 963                 return -EIO;
 964         }
 965
 966         /* initialize eeprom parameters */
 967
 968         if(e1000_init_eeprom_params(hw)) {
 969                 E1000_ERR("EEPROM initialization failed\n");
 970                 return -EIO;
 971         }
 972
 973         switch(hw->mac_type) {
 974         default:
 975                 break;
 976         case e1000_82541:
 977         case e1000_82547:
 978         case e1000_82541_rev_2:
 979         case e1000_82547_rev_2:
 980                 hw->phy_init_script = 1;
 981                 break;
 982         }
 983
 984         e1000_set_media_type(hw);
 985
 986         hw->wait_autoneg_complete = FALSE;
 987         hw->tbi_compatibility_en = TRUE;
 988         hw->adaptive_ifs = TRUE;
 989
 990         /* Copper options */
 991
 992         if(hw->media_type == e1000_media_type_copper) {
 993                 hw->mdix = AUTO_ALL_MODES;
 994                 hw->disable_polarity_correction = FALSE;
 995                 hw->master_slave = E1000_MASTER_SLAVE;
 996         }
 997
 998 #ifdef CONFIG_E1000_MQ
 999         /* Number of supported queues */
1000         switch (hw->mac_type) {
1001         case e1000_82571:
1002         case e1000_82572:
1003                 /* These controllers support 2 tx queues, but with a single
1004                  * qdisc implementation, multiple tx queues aren't quite as
1005                  * interesting.  If we can find a logical way of mapping
1006                  * flows to a queue, then perhaps we can up the num_tx_queue
1007                  * count back to its default.  Until then, we run the risk of
1008                  * terrible performance due to SACK overload. */
1009                 adapter->num_tx_queues = 1;
1010                 adapter->num_rx_queues = 2;
1011                 break;
1012         default:
1013                 adapter->num_tx_queues = 1;
1014                 adapter->num_rx_queues = 1;
1015                 break;
1016         }
1017         adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
1018         adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
1019         DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
1020                 adapter->num_rx_queues,
1021                 ((adapter->num_rx_queues == 1)
1022                  ? ((num_online_cpus() > 1)
1023                         ? "(due to unsupported feature in current adapter)"
1024                         : "(due to unsupported system configuration)")
1025                  : ""));
1026         DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
1027                 adapter->num_tx_queues);
1028 #else
1029         adapter->num_tx_queues = 1;
1030         adapter->num_rx_queues = 1;
1031 #endif
1032
1033         if (e1000_alloc_queues(adapter)) {
1034                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1035                 return -ENOMEM;
1036         }
1037
1038 #ifdef CONFIG_E1000_NAPI
1039         for (i = 0; i < adapter->num_rx_queues; i++) {
1040                 adapter->polling_netdev[i].priv = adapter;
1041                 adapter->polling_netdev[i].poll = &e1000_clean;
1042                 adapter->polling_netdev[i].weight = 64;
1043                 dev_hold(&adapter->polling_netdev[i]);
1044                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1045         }
1046         spin_lock_init(&adapter->tx_queue_lock);
1047 #endif
1048
1049         atomic_set(&adapter->irq_sem, 1);
1050         spin_lock_init(&adapter->stats_lock);
1051
1052         return 0;
1053 }
1054
1055 /**
1056  * e1000_alloc_queues - Allocate memory for all rings
1057  * @adapter: board private structure to initialize
1058  *
1059  * We allocate one ring per queue at run-time since we don't know the
1060  * number of queues at compile-time.  The polling_netdev array is
1061  * intended for Multiqueue, but should work fine with a single queue.
1062  **/
1063
1064 static int __devinit
1065 e1000_alloc_queues(struct e1000_adapter *adapter)
1066 {
1067         int size;
1068
1069         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1070         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1071         if (!adapter->tx_ring)
1072                 return -ENOMEM;
1073         memset(adapter->tx_ring, 0, size);
1074
1075         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1076         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1077         if (!adapter->rx_ring) {
1078                 kfree(adapter->tx_ring);
1079                 return -ENOMEM;
1080         }
1081         memset(adapter->rx_ring, 0, size);
1082
1083 #ifdef CONFIG_E1000_NAPI
1084         size = sizeof(struct net_device) * adapter->num_rx_queues;
1085         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1086         if (!adapter->polling_netdev) {
1087                 kfree(adapter->tx_ring);
1088                 kfree(adapter->rx_ring);
1089                 return -ENOMEM;
1090         }
1091         memset(adapter->polling_netdev, 0, size);
1092 #endif
1093
1094 #ifdef CONFIG_E1000_MQ
1095         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1096         adapter->rx_sched_call_data.info = adapter->netdev;
1097
1098         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1099         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1100 #endif
1101
1102         return E1000_SUCCESS;
1103 }
1104
1105 #ifdef CONFIG_E1000_MQ
1106 static void __devinit
1107 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1108 {
1109         int i, cpu;
1110
1111         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1112         adapter->rx_sched_call_data.info = adapter->netdev;
1113         cpus_clear(adapter->rx_sched_call_data.cpumask);
1114
1115         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1116         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1117
1118         lock_cpu_hotplug();
1119         i = 0;
1120         for_each_online_cpu(cpu) {
1121                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_tx_queues];
1122                 /* This is incomplete because we'd like to assign separate
1123                  * physical cpus to these netdev polling structures and
1124                  * avoid saturating a subset of cpus.
1125                  */
1126                 if (i < adapter->num_rx_queues) {
1127                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1128                         adapter->rx_ring[i].cpu = cpu;
1129                         cpu_set(cpu, adapter->cpumask);
1130                 } else
1131                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1132
1133                 i++;
1134         }
1135         unlock_cpu_hotplug();
1136 }
1137 #endif
1138
1139 /**
1140  * e1000_open - Called when a network interface is made active
1141  * @netdev: network interface device structure
1142  *
1143  * Returns 0 on success, negative value on failure
1144  *
1145  * The open entry point is called when a network interface is made
1146  * active by the system (IFF_UP).  At this point all resources needed
1147  * for transmit and receive operations are allocated, the interrupt
1148  * handler is registered with the OS, the watchdog timer is started,
1149  * and the stack is notified that the interface is ready.
1150  **/
1151
1152 static int
1153 e1000_open(struct net_device *netdev)
1154 {
1155         struct e1000_adapter *adapter = netdev_priv(netdev);
1156         int err;
1157
1158         /* allocate transmit descriptors */
1159
1160         if ((err = e1000_setup_all_tx_resources(adapter)))
1161                 goto err_setup_tx;
1162
1163         /* allocate receive descriptors */
1164
1165         if ((err = e1000_setup_all_rx_resources(adapter)))
1166                 goto err_setup_rx;
1167
1168         if((err = e1000_up(adapter)))
1169                 goto err_up;
1170         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1171         if((adapter->hw.mng_cookie.status &
1172                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1173                 e1000_update_mng_vlan(adapter);
1174         }
1175
1176         /* If AMT is enabled, let the firmware know that the network
1177          * interface is now open */
1178         if (adapter->hw.mac_type == e1000_82573 &&
1179             e1000_check_mng_mode(&adapter->hw))
1180                 e1000_get_hw_control(adapter);
1181
1182         return E1000_SUCCESS;
1183
1184 err_up:
1185         e1000_free_all_rx_resources(adapter);
1186 err_setup_rx:
1187         e1000_free_all_tx_resources(adapter);
1188 err_setup_tx:
1189         e1000_reset(adapter);
1190
1191         return err;
1192 }
1193
1194 /**
1195  * e1000_close - Disables a network interface
1196  * @netdev: network interface device structure
1197  *
1198  * Returns 0, this is not allowed to fail
1199  *
1200  * The close entry point is called when an interface is de-activated
1201  * by the OS.  The hardware is still under the drivers control, but
1202  * needs to be disabled.  A global MAC reset is issued to stop the
1203  * hardware, and all transmit and receive resources are freed.
1204  **/
1205
1206 static int
1207 e1000_close(struct net_device *netdev)
1208 {
1209         struct e1000_adapter *adapter = netdev_priv(netdev);
1210
1211         e1000_down(adapter);
1212
1213         e1000_free_all_tx_resources(adapter);
1214         e1000_free_all_rx_resources(adapter);
1215
1216         if((adapter->hw.mng_cookie.status &
1217                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1218                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1219         }
1220
1221         /* If AMT is enabled, let the firmware know that the network
1222          * interface is now closed */
1223         if (adapter->hw.mac_type == e1000_82573 &&
1224             e1000_check_mng_mode(&adapter->hw))
1225                 e1000_release_hw_control(adapter);
1226
1227         return 0;
1228 }
1229
1230 /**
1231  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1232  * @adapter: address of board private structure
1233  * @start: address of beginning of memory
1234  * @len: length of memory
1235  **/
1236 static inline boolean_t
1237 e1000_check_64k_bound(struct e1000_adapter *adapter,
1238                       void *start, unsigned long len)
1239 {
1240         unsigned long begin = (unsigned long) start;
1241         unsigned long end = begin + len;
1242
1243         /* First rev 82545 and 82546 need to not allow any memory
1244          * write location to cross 64k boundary due to errata 23 */
1245         if (adapter->hw.mac_type == e1000_82545 ||
1246             adapter->hw.mac_type == e1000_82546) {
1247                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1248         }
1249
1250         return TRUE;
1251 }
1252
1253 /**
1254  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1255  * @adapter: board private structure
1256  * @txdr:    tx descriptor ring (for a specific queue) to setup
1257  *
1258  * Return 0 on success, negative on failure
1259  **/
1260
1261 static int
1262 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1263                          struct e1000_tx_ring *txdr)
1264 {
1265         struct pci_dev *pdev = adapter->pdev;
1266         int size;
1267
1268         size = sizeof(struct e1000_buffer) * txdr->count;
1269
1270         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1271         if(!txdr->buffer_info) {
1272                 DPRINTK(PROBE, ERR,
1273                 "Unable to allocate memory for the transmit descriptor ring\n");
1274                 return -ENOMEM;
1275         }
1276         memset(txdr->buffer_info, 0, size);
1277
1278         /* round up to nearest 4K */
1279
1280         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1281         E1000_ROUNDUP(txdr->size, 4096);
1282
1283         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1284         if(!txdr->desc) {
1285 setup_tx_desc_die:
1286                 vfree(txdr->buffer_info);
1287                 DPRINTK(PROBE, ERR,
1288                 "Unable to allocate memory for the transmit descriptor ring\n");
1289                 return -ENOMEM;
1290         }
1291
1292         /* Fix for errata 23, can't cross 64kB boundary */
1293         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1294                 void *olddesc = txdr->desc;
1295                 dma_addr_t olddma = txdr->dma;
1296                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1297                                      "at %p\n", txdr->size, txdr->desc);
1298                 /* Try again, without freeing the previous */
1299                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1300                 if(!txdr->desc) {
1301                 /* Failed allocation, critical failure */
1302                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1303                         goto setup_tx_desc_die;
1304                 }
1305
1306                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1307                         /* give up */
1308                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1309                                             txdr->dma);
1310                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1311                         DPRINTK(PROBE, ERR,
1312                                 "Unable to allocate aligned memory "
1313                                 "for the transmit descriptor ring\n");
1314                         vfree(txdr->buffer_info);
1315                         return -ENOMEM;
1316                 } else {
1317                         /* Free old allocation, new allocation was successful */
1318                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1319                 }
1320         }
1321         memset(txdr->desc, 0, txdr->size);
1322
1323         txdr->next_to_use = 0;
1324         txdr->next_to_clean = 0;
1325         spin_lock_init(&txdr->tx_lock);
1326
1327         return 0;
1328 }
1329
1330 /**
1331  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1332  *                                (Descriptors) for all queues
1333  * @adapter: board private structure
1334  *
1335  * If this function returns with an error, then it's possible one or
1336  * more of the rings is populated (while the rest are not).  It is the
1337  * callers duty to clean those orphaned rings.
1338  *
1339  * Return 0 on success, negative on failure
1340  **/
1341
1342 int
1343 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1344 {
1345         int i, err = 0;
1346
1347         for (i = 0; i < adapter->num_tx_queues; i++) {
1348                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1349                 if (err) {
1350                         DPRINTK(PROBE, ERR,
1351                                 "Allocation for Tx Queue %u failed\n", i);
1352                         break;
1353                 }
1354         }
1355
1356         return err;
1357 }
1358
1359 /**
1360  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1361  * @adapter: board private structure
1362  *
1363  * Configure the Tx unit of the MAC after a reset.
1364  **/
1365
1366 static void
1367 e1000_configure_tx(struct e1000_adapter *adapter)
1368 {
1369         uint64_t tdba;
1370         struct e1000_hw *hw = &adapter->hw;
1371         uint32_t tdlen, tctl, tipg, tarc;
1372         uint32_t ipgr1, ipgr2;
1373
1374         /* Setup the HW Tx Head and Tail descriptor pointers */
1375
1376         switch (adapter->num_tx_queues) {
1377         case 2:
1378                 tdba = adapter->tx_ring[1].dma;
1379                 tdlen = adapter->tx_ring[1].count *
1380                         sizeof(struct e1000_tx_desc);
1381                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1382                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1383                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1384                 E1000_WRITE_REG(hw, TDH1, 0);
1385                 E1000_WRITE_REG(hw, TDT1, 0);
1386                 adapter->tx_ring[1].tdh = E1000_TDH1;
1387                 adapter->tx_ring[1].tdt = E1000_TDT1;
1388                 /* Fall Through */
1389         case 1:
1390         default:
1391                 tdba = adapter->tx_ring[0].dma;
1392                 tdlen = adapter->tx_ring[0].count *
1393                         sizeof(struct e1000_tx_desc);
1394                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1395                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1396                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1397                 E1000_WRITE_REG(hw, TDH, 0);
1398                 E1000_WRITE_REG(hw, TDT, 0);
1399                 adapter->tx_ring[0].tdh = E1000_TDH;
1400                 adapter->tx_ring[0].tdt = E1000_TDT;
1401                 break;
1402         }
1403
1404         /* Set the default values for the Tx Inter Packet Gap timer */
1405
1406         if (hw->media_type == e1000_media_type_fiber ||
1407             hw->media_type == e1000_media_type_internal_serdes)
1408                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1409         else
1410                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1411
1412         switch (hw->mac_type) {
1413         case e1000_82542_rev2_0:
1414         case e1000_82542_rev2_1:
1415                 tipg = DEFAULT_82542_TIPG_IPGT;
1416                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1417                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1418                 break;
1419         default:
1420                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1421                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1422                 break;
1423         }
1424         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1425         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1426         E1000_WRITE_REG(hw, TIPG, tipg);
1427
1428         /* Set the Tx Interrupt Delay register */
1429
1430         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1431         if (hw->mac_type >= e1000_82540)
1432                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1433
1434         /* Program the Transmit Control Register */
1435
1436         tctl = E1000_READ_REG(hw, TCTL);
1437
1438         tctl &= ~E1000_TCTL_CT;
1439         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1440                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1441
1442         E1000_WRITE_REG(hw, TCTL, tctl);
1443
1444         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1445                 tarc = E1000_READ_REG(hw, TARC0);
1446                 tarc |= ((1 << 25) | (1 << 21));
1447                 E1000_WRITE_REG(hw, TARC0, tarc);
1448                 tarc = E1000_READ_REG(hw, TARC1);
1449                 tarc |= (1 << 25);
1450                 if (tctl & E1000_TCTL_MULR)
1451                         tarc &= ~(1 << 28);
1452                 else
1453                         tarc |= (1 << 28);
1454                 E1000_WRITE_REG(hw, TARC1, tarc);
1455         }
1456
1457         e1000_config_collision_dist(hw);
1458
1459         /* Setup Transmit Descriptor Settings for eop descriptor */
1460         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1461                 E1000_TXD_CMD_IFCS;
1462
1463         if (hw->mac_type < e1000_82543)
1464                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1465         else
1466                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1467
1468         /* Cache if we're 82544 running in PCI-X because we'll
1469          * need this to apply a workaround later in the send path. */
1470         if (hw->mac_type == e1000_82544 &&
1471             hw->bus_type == e1000_bus_type_pcix)
1472                 adapter->pcix_82544 = 1;
1473 }
1474
1475 /**
1476  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1477  * @adapter: board private structure
1478  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1479  *
1480  * Returns 0 on success, negative on failure
1481  **/
1482
1483 static int
1484 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1485                          struct e1000_rx_ring *rxdr)
1486 {
1487         struct pci_dev *pdev = adapter->pdev;
1488         int size, desc_len;
1489
1490         size = sizeof(struct e1000_buffer) * rxdr->count;
1491         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1492         if (!rxdr->buffer_info) {
1493                 DPRINTK(PROBE, ERR,
1494                 "Unable to allocate memory for the receive descriptor ring\n");
1495                 return -ENOMEM;
1496         }
1497         memset(rxdr->buffer_info, 0, size);
1498
1499         size = sizeof(struct e1000_ps_page) * rxdr->count;
1500         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1501         if(!rxdr->ps_page) {
1502                 vfree(rxdr->buffer_info);
1503                 DPRINTK(PROBE, ERR,
1504                 "Unable to allocate memory for the receive descriptor ring\n");
1505                 return -ENOMEM;
1506         }
1507         memset(rxdr->ps_page, 0, size);
1508
1509         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1510         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1511         if(!rxdr->ps_page_dma) {
1512                 vfree(rxdr->buffer_info);
1513                 kfree(rxdr->ps_page);
1514                 DPRINTK(PROBE, ERR,
1515                 "Unable to allocate memory for the receive descriptor ring\n");
1516                 return -ENOMEM;
1517         }
1518         memset(rxdr->ps_page_dma, 0, size);
1519
1520         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1521                 desc_len = sizeof(struct e1000_rx_desc);
1522         else
1523                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1524
1525         /* Round up to nearest 4K */
1526
1527         rxdr->size = rxdr->count * desc_len;
1528         E1000_ROUNDUP(rxdr->size, 4096);
1529
1530         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1531
1532         if (!rxdr->desc) {
1533                 DPRINTK(PROBE, ERR,
1534                 "Unable to allocate memory for the receive descriptor ring\n");
1535 setup_rx_desc_die:
1536                 vfree(rxdr->buffer_info);
1537                 kfree(rxdr->ps_page);
1538                 kfree(rxdr->ps_page_dma);
1539                 return -ENOMEM;
1540         }
1541
1542         /* Fix for errata 23, can't cross 64kB boundary */
1543         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1544                 void *olddesc = rxdr->desc;
1545                 dma_addr_t olddma = rxdr->dma;
1546                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1547                                      "at %p\n", rxdr->size, rxdr->desc);
1548                 /* Try again, without freeing the previous */
1549                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1550                 /* Failed allocation, critical failure */
1551                 if (!rxdr->desc) {
1552                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1553                         DPRINTK(PROBE, ERR,
1554                                 "Unable to allocate memory "
1555                                 "for the receive descriptor ring\n");
1556                         goto setup_rx_desc_die;
1557                 }
1558
1559                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1560                         /* give up */
1561                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1562                                             rxdr->dma);
1563                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1564                         DPRINTK(PROBE, ERR,
1565                                 "Unable to allocate aligned memory "
1566                                 "for the receive descriptor ring\n");
1567                         goto setup_rx_desc_die;
1568                 } else {
1569                         /* Free old allocation, new allocation was successful */
1570                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1571                 }
1572         }
1573         memset(rxdr->desc, 0, rxdr->size);
1574
1575         rxdr->next_to_clean = 0;
1576         rxdr->next_to_use = 0;
1577         rxdr->rx_skb_top = NULL;
1578         rxdr->rx_skb_prev = NULL;
1579
1580         return 0;
1581 }
1582
1583 /**
1584  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1585  *                                (Descriptors) for all queues
1586  * @adapter: board private structure
1587  *
1588  * If this function returns with an error, then it's possible one or
1589  * more of the rings is populated (while the rest are not).  It is the
1590  * callers duty to clean those orphaned rings.
1591  *
1592  * Return 0 on success, negative on failure
1593  **/
1594
1595 int
1596 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1597 {
1598         int i, err = 0;
1599
1600         for (i = 0; i < adapter->num_rx_queues; i++) {
1601                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1602                 if (err) {
1603                         DPRINTK(PROBE, ERR,
1604                                 "Allocation for Rx Queue %u failed\n", i);
1605                         break;
1606                 }
1607         }
1608
1609         return err;
1610 }
1611
1612 /**
1613  * e1000_setup_rctl - configure the receive control registers
1614  * @adapter: Board private structure
1615  **/
1616 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1617                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1618 static void
1619 e1000_setup_rctl(struct e1000_adapter *adapter)
1620 {
1621         uint32_t rctl, rfctl;
1622         uint32_t psrctl = 0;
1623 #ifdef CONFIG_E1000_PACKET_SPLIT
1624         uint32_t pages = 0;
1625 #endif
1626
1627         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1628
1629         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1630
1631         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1632                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1633                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1634
1635         if (adapter->hw.mac_type > e1000_82543)
1636                 rctl |= E1000_RCTL_SECRC;
1637
1638         if (adapter->hw.tbi_compatibility_on == 1)
1639                 rctl |= E1000_RCTL_SBP;
1640         else
1641                 rctl &= ~E1000_RCTL_SBP;
1642
1643         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1644                 rctl &= ~E1000_RCTL_LPE;
1645         else
1646                 rctl |= E1000_RCTL_LPE;
1647
1648         /* Setup buffer sizes */
1649         if(adapter->hw.mac_type >= e1000_82571) {
1650                 /* We can now specify buffers in 1K increments.
1651                  * BSIZE and BSEX are ignored in this case. */
1652                 rctl |= adapter->rx_buffer_len << 0x11;
1653         } else {
1654                 rctl &= ~E1000_RCTL_SZ_4096;
1655                 rctl |= E1000_RCTL_BSEX;
1656                 switch (adapter->rx_buffer_len) {
1657                 case E1000_RXBUFFER_2048:
1658                 default:
1659                         rctl |= E1000_RCTL_SZ_2048;
1660                         rctl &= ~E1000_RCTL_BSEX;
1661                         break;
1662                 case E1000_RXBUFFER_4096:
1663                         rctl |= E1000_RCTL_SZ_4096;
1664                         break;
1665                 case E1000_RXBUFFER_8192:
1666                         rctl |= E1000_RCTL_SZ_8192;
1667                         break;
1668                 case E1000_RXBUFFER_16384:
1669                         rctl |= E1000_RCTL_SZ_16384;
1670                         break;
1671                 }
1672         }
1673
1674 #ifdef CONFIG_E1000_PACKET_SPLIT
1675         /* 82571 and greater support packet-split where the protocol
1676          * header is placed in skb->data and the packet data is
1677          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1678          * In the case of a non-split, skb->data is linearly filled,
1679          * followed by the page buffers.  Therefore, skb->data is
1680          * sized to hold the largest protocol header.
1681          */
1682         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1683         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1684             PAGE_SIZE <= 16384)
1685                 adapter->rx_ps_pages = pages;
1686         else
1687                 adapter->rx_ps_pages = 0;
1688 #endif
1689         if (adapter->rx_ps_pages) {
1690                 /* Configure extra packet-split registers */
1691                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1692                 rfctl |= E1000_RFCTL_EXTEN;
1693                 /* disable IPv6 packet split support */
1694                 rfctl |= E1000_RFCTL_IPV6_DIS;
1695                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1696
1697                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1698
1699                 psrctl |= adapter->rx_ps_bsize0 >>
1700                         E1000_PSRCTL_BSIZE0_SHIFT;
1701
1702                 switch (adapter->rx_ps_pages) {
1703                 case 3:
1704                         psrctl |= PAGE_SIZE <<
1705                                 E1000_PSRCTL_BSIZE3_SHIFT;
1706                 case 2:
1707                         psrctl |= PAGE_SIZE <<
1708                                 E1000_PSRCTL_BSIZE2_SHIFT;
1709                 case 1:
1710                         psrctl |= PAGE_SIZE >>
1711                                 E1000_PSRCTL_BSIZE1_SHIFT;
1712                         break;
1713                 }
1714
1715                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1716         }
1717
1718         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1719 }
1720
1721 /**
1722  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1723  * @adapter: board private structure
1724  *
1725  * Configure the Rx unit of the MAC after a reset.
1726  **/
1727
1728 static void
1729 e1000_configure_rx(struct e1000_adapter *adapter)
1730 {
1731         uint64_t rdba;
1732         struct e1000_hw *hw = &adapter->hw;
1733         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1734 #ifdef CONFIG_E1000_MQ
1735         uint32_t reta, mrqc;
1736         int i;
1737 #endif
1738
1739         if (adapter->rx_ps_pages) {
1740                 rdlen = adapter->rx_ring[0].count *
1741                         sizeof(union e1000_rx_desc_packet_split);
1742                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1743                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1744         } else {
1745                 rdlen = adapter->rx_ring[0].count *
1746                         sizeof(struct e1000_rx_desc);
1747                 adapter->clean_rx = e1000_clean_rx_irq;
1748                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1749         }
1750
1751         /* disable receives while setting up the descriptors */
1752         rctl = E1000_READ_REG(hw, RCTL);
1753         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1754
1755         /* set the Receive Delay Timer Register */
1756         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1757
1758         if (hw->mac_type >= e1000_82540) {
1759                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1760                 if(adapter->itr > 1)
1761                         E1000_WRITE_REG(hw, ITR,
1762                                 1000000000 / (adapter->itr * 256));
1763         }
1764
1765         if (hw->mac_type >= e1000_82571) {
1766                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1767                 /* Reset delay timers after every interrupt */
1768                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1769 #ifdef CONFIG_E1000_NAPI
1770                 /* Auto-Mask interrupts upon ICR read. */
1771                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1772 #endif
1773                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1774                 E1000_WRITE_REG(hw, IAM, ~0);
1775                 E1000_WRITE_FLUSH(hw);
1776         }
1777
1778         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1779          * the Base and Length of the Rx Descriptor Ring */
1780         switch (adapter->num_rx_queues) {
1781 #ifdef CONFIG_E1000_MQ
1782         case 2:
1783                 rdba = adapter->rx_ring[1].dma;
1784                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1785                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1786                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1787                 E1000_WRITE_REG(hw, RDH1, 0);
1788                 E1000_WRITE_REG(hw, RDT1, 0);
1789                 adapter->rx_ring[1].rdh = E1000_RDH1;
1790                 adapter->rx_ring[1].rdt = E1000_RDT1;
1791                 /* Fall Through */
1792 #endif
1793         case 1:
1794         default:
1795                 rdba = adapter->rx_ring[0].dma;
1796                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1797                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1798                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1799                 E1000_WRITE_REG(hw, RDH, 0);
1800                 E1000_WRITE_REG(hw, RDT, 0);
1801                 adapter->rx_ring[0].rdh = E1000_RDH;
1802                 adapter->rx_ring[0].rdt = E1000_RDT;
1803                 break;
1804         }
1805
1806 #ifdef CONFIG_E1000_MQ
1807         if (adapter->num_rx_queues > 1) {
1808                 uint32_t random[10];
1809
1810                 get_random_bytes(&random[0], 40);
1811
1812                 if (hw->mac_type <= e1000_82572) {
1813                         E1000_WRITE_REG(hw, RSSIR, 0);
1814                         E1000_WRITE_REG(hw, RSSIM, 0);
1815                 }
1816
1817                 switch (adapter->num_rx_queues) {
1818                 case 2:
1819                 default:
1820                         reta = 0x00800080;
1821                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1822                         break;
1823                 }
1824
1825                 /* Fill out redirection table */
1826                 for (i = 0; i < 32; i++)
1827                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1828                 /* Fill out hash function seeds */
1829                 for (i = 0; i < 10; i++)
1830                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1831
1832                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1833                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1834                 E1000_WRITE_REG(hw, MRQC, mrqc);
1835         }
1836
1837         /* Multiqueue and packet checksumming are mutually exclusive. */
1838         if (hw->mac_type >= e1000_82571) {
1839                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1840                 rxcsum |= E1000_RXCSUM_PCSD;
1841                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1842         }
1843
1844 #else
1845
1846         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1847         if (hw->mac_type >= e1000_82543) {
1848                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1849                 if(adapter->rx_csum == TRUE) {
1850                         rxcsum |= E1000_RXCSUM_TUOFL;
1851
1852                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1853                          * Must be used in conjunction with packet-split. */
1854                         if ((hw->mac_type >= e1000_82571) &&
1855                            (adapter->rx_ps_pages)) {
1856                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1857                         }
1858                 } else {
1859                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1860                         /* don't need to clear IPPCSE as it defaults to 0 */
1861                 }
1862                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1863         }
1864 #endif /* CONFIG_E1000_MQ */
1865
1866         if (hw->mac_type == e1000_82573)
1867                 E1000_WRITE_REG(hw, ERT, 0x0100);
1868
1869         /* Enable Receives */
1870         E1000_WRITE_REG(hw, RCTL, rctl);
1871 }
1872
1873 /**
1874  * e1000_free_tx_resources - Free Tx Resources per Queue
1875  * @adapter: board private structure
1876  * @tx_ring: Tx descriptor ring for a specific queue
1877  *
1878  * Free all transmit software resources
1879  **/
1880
1881 static void
1882 e1000_free_tx_resources(struct e1000_adapter *adapter,
1883                         struct e1000_tx_ring *tx_ring)
1884 {
1885         struct pci_dev *pdev = adapter->pdev;
1886
1887         e1000_clean_tx_ring(adapter, tx_ring);
1888
1889         vfree(tx_ring->buffer_info);
1890         tx_ring->buffer_info = NULL;
1891
1892         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1893
1894         tx_ring->desc = NULL;
1895 }
1896
1897 /**
1898  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1899  * @adapter: board private structure
1900  *
1901  * Free all transmit software resources
1902  **/
1903
1904 void
1905 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1906 {
1907         int i;
1908
1909         for (i = 0; i < adapter->num_tx_queues; i++)
1910                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1911 }
1912
1913 static inline void
1914 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1915                         struct e1000_buffer *buffer_info)
1916 {
1917         if(buffer_info->dma) {
1918                 pci_unmap_page(adapter->pdev,
1919                                 buffer_info->dma,
1920                                 buffer_info->length,
1921                                 PCI_DMA_TODEVICE);
1922                 buffer_info->dma = 0;
1923         }
1924         if(buffer_info->skb) {
1925                 dev_kfree_skb_any(buffer_info->skb);
1926                 buffer_info->skb = NULL;
1927         }
1928 }
1929
1930 /**
1931  * e1000_clean_tx_ring - Free Tx Buffers
1932  * @adapter: board private structure
1933  * @tx_ring: ring to be cleaned
1934  **/
1935
1936 static void
1937 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1938                     struct e1000_tx_ring *tx_ring)
1939 {
1940         struct e1000_buffer *buffer_info;
1941         unsigned long size;
1942         unsigned int i;
1943
1944         /* Free all the Tx ring sk_buffs */
1945
1946         for(i = 0; i < tx_ring->count; i++) {
1947                 buffer_info = &tx_ring->buffer_info[i];
1948                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1949         }
1950
1951         size = sizeof(struct e1000_buffer) * tx_ring->count;
1952         memset(tx_ring->buffer_info, 0, size);
1953
1954         /* Zero out the descriptor ring */
1955
1956         memset(tx_ring->desc, 0, tx_ring->size);
1957
1958         tx_ring->next_to_use = 0;
1959         tx_ring->next_to_clean = 0;
1960         tx_ring->last_tx_tso = 0;
1961
1962         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1963         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1964 }
1965
1966 /**
1967  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1968  * @adapter: board private structure
1969  **/
1970
1971 static void
1972 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1973 {
1974         int i;
1975
1976         for (i = 0; i < adapter->num_tx_queues; i++)
1977                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1978 }
1979
1980 /**
1981  * e1000_free_rx_resources - Free Rx Resources
1982  * @adapter: board private structure
1983  * @rx_ring: ring to clean the resources from
1984  *
1985  * Free all receive software resources
1986  **/
1987
1988 static void
1989 e1000_free_rx_resources(struct e1000_adapter *adapter,
1990                         struct e1000_rx_ring *rx_ring)
1991 {
1992         struct pci_dev *pdev = adapter->pdev;
1993
1994         e1000_clean_rx_ring(adapter, rx_ring);
1995
1996         vfree(rx_ring->buffer_info);
1997         rx_ring->buffer_info = NULL;
1998         kfree(rx_ring->ps_page);
1999         rx_ring->ps_page = NULL;
2000         kfree(rx_ring->ps_page_dma);
2001         rx_ring->ps_page_dma = NULL;
2002
2003         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2004
2005         rx_ring->desc = NULL;
2006 }
2007
2008 /**
2009  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2010  * @adapter: board private structure
2011  *
2012  * Free all receive software resources
2013  **/
2014
2015 void
2016 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2017 {
2018         int i;
2019
2020         for (i = 0; i < adapter->num_rx_queues; i++)
2021                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2022 }
2023
2024 /**
2025  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2026  * @adapter: board private structure
2027  * @rx_ring: ring to free buffers from
2028  **/
2029
2030 static void
2031 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2032                     struct e1000_rx_ring *rx_ring)
2033 {
2034         struct e1000_buffer *buffer_info;
2035         struct e1000_ps_page *ps_page;
2036         struct e1000_ps_page_dma *ps_page_dma;
2037         struct pci_dev *pdev = adapter->pdev;
2038         unsigned long size;
2039         unsigned int i, j;
2040
2041         /* Free all the Rx ring sk_buffs */
2042
2043         for(i = 0; i < rx_ring->count; i++) {
2044                 buffer_info = &rx_ring->buffer_info[i];
2045                 if(buffer_info->skb) {
2046                         ps_page = &rx_ring->ps_page[i];
2047                         ps_page_dma = &rx_ring->ps_page_dma[i];
2048                         pci_unmap_single(pdev,
2049                                          buffer_info->dma,
2050                                          buffer_info->length,
2051                                          PCI_DMA_FROMDEVICE);
2052
2053                         dev_kfree_skb(buffer_info->skb);
2054                         buffer_info->skb = NULL;
2055                 }
2056                 ps_page = &rx_ring->ps_page[i];
2057                 ps_page_dma = &rx_ring->ps_page_dma[i];
2058                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2059                         if (!ps_page->ps_page[j]) break;
2060                         pci_unmap_page(pdev,
2061                                        ps_page_dma->ps_page_dma[j],
2062                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2063                         ps_page_dma->ps_page_dma[j] = 0;
2064                         put_page(ps_page->ps_page[j]);
2065                         ps_page->ps_page[j] = NULL;
2066                 }
2067         }
2068
2069         /* there also may be some cached data in our adapter */
2070         if (rx_ring->rx_skb_top) {
2071                 dev_kfree_skb(rx_ring->rx_skb_top);
2072
2073                 /* rx_skb_prev will be wiped out by rx_skb_top */
2074                 rx_ring->rx_skb_top = NULL;
2075                 rx_ring->rx_skb_prev = NULL;
2076         }
2077
2078
2079         size = sizeof(struct e1000_buffer) * rx_ring->count;
2080         memset(rx_ring->buffer_info, 0, size);
2081         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2082         memset(rx_ring->ps_page, 0, size);
2083         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2084         memset(rx_ring->ps_page_dma, 0, size);
2085
2086         /* Zero out the descriptor ring */
2087
2088         memset(rx_ring->desc, 0, rx_ring->size);
2089
2090         rx_ring->next_to_clean = 0;
2091         rx_ring->next_to_use = 0;
2092
2093         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2094         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2095 }
2096
2097 /**
2098  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2099  * @adapter: board private structure
2100  **/
2101
2102 static void
2103 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2104 {
2105         int i;
2106
2107         for (i = 0; i < adapter->num_rx_queues; i++)
2108                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2109 }
2110
2111 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2112  * and memory write and invalidate disabled for certain operations
2113  */
2114 static void
2115 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2116 {
2117         struct net_device *netdev = adapter->netdev;
2118         uint32_t rctl;
2119
2120         e1000_pci_clear_mwi(&adapter->hw);
2121
2122         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2123         rctl |= E1000_RCTL_RST;
2124         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2125         E1000_WRITE_FLUSH(&adapter->hw);
2126         mdelay(5);
2127
2128         if(netif_running(netdev))
2129                 e1000_clean_all_rx_rings(adapter);
2130 }
2131
2132 static void
2133 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2134 {
2135         struct net_device *netdev = adapter->netdev;
2136         uint32_t rctl;
2137
2138         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2139         rctl &= ~E1000_RCTL_RST;
2140         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2141         E1000_WRITE_FLUSH(&adapter->hw);
2142         mdelay(5);
2143
2144         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2145                 e1000_pci_set_mwi(&adapter->hw);
2146
2147         if(netif_running(netdev)) {
2148                 e1000_configure_rx(adapter);
2149                 /* No need to loop, because 82542 supports only 1 queue */
2150                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2151                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2152         }
2153 }
2154
2155 /**
2156  * e1000_set_mac - Change the Ethernet Address of the NIC
2157  * @netdev: network interface device structure
2158  * @p: pointer to an address structure
2159  *
2160  * Returns 0 on success, negative on failure
2161  **/
2162
2163 static int
2164 e1000_set_mac(struct net_device *netdev, void *p)
2165 {
2166         struct e1000_adapter *adapter = netdev_priv(netdev);
2167         struct sockaddr *addr = p;
2168
2169         if(!is_valid_ether_addr(addr->sa_data))
2170                 return -EADDRNOTAVAIL;
2171
2172         /* 82542 2.0 needs to be in reset to write receive address registers */
2173
2174         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2175                 e1000_enter_82542_rst(adapter);
2176
2177         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2178         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2179
2180         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2181
2182         /* With 82571 controllers, LAA may be overwritten (with the default)
2183          * due to controller reset from the other port. */
2184         if (adapter->hw.mac_type == e1000_82571) {
2185                 /* activate the work around */
2186                 adapter->hw.laa_is_present = 1;
2187
2188                 /* Hold a copy of the LAA in RAR[14] This is done so that
2189                  * between the time RAR[0] gets clobbered  and the time it
2190                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2191                  * of the RARs and no incoming packets directed to this port
2192                  * are dropped. Eventaully the LAA will be in RAR[0] and
2193                  * RAR[14] */
2194                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2195                                         E1000_RAR_ENTRIES - 1);
2196         }
2197
2198         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2199                 e1000_leave_82542_rst(adapter);
2200
2201         return 0;
2202 }
2203
2204 /**
2205  * e1000_set_multi - Multicast and Promiscuous mode set
2206  * @netdev: network interface device structure
2207  *
2208  * The set_multi entry point is called whenever the multicast address
2209  * list or the network interface flags are updated.  This routine is
2210  * responsible for configuring the hardware for proper multicast,
2211  * promiscuous mode, and all-multi behavior.
2212  **/
2213
2214 static void
2215 e1000_set_multi(struct net_device *netdev)
2216 {
2217         struct e1000_adapter *adapter = netdev_priv(netdev);
2218         struct e1000_hw *hw = &adapter->hw;
2219         struct dev_mc_list *mc_ptr;
2220         uint32_t rctl;
2221         uint32_t hash_value;
2222         int i, rar_entries = E1000_RAR_ENTRIES;
2223
2224         /* reserve RAR[14] for LAA over-write work-around */
2225         if (adapter->hw.mac_type == e1000_82571)
2226                 rar_entries--;
2227
2228         /* Check for Promiscuous and All Multicast modes */
2229
2230         rctl = E1000_READ_REG(hw, RCTL);
2231
2232         if(netdev->flags & IFF_PROMISC) {
2233                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2234         } else if(netdev->flags & IFF_ALLMULTI) {
2235                 rctl |= E1000_RCTL_MPE;
2236                 rctl &= ~E1000_RCTL_UPE;
2237         } else {
2238                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2239         }
2240
2241         E1000_WRITE_REG(hw, RCTL, rctl);
2242
2243         /* 82542 2.0 needs to be in reset to write receive address registers */
2244
2245         if(hw->mac_type == e1000_82542_rev2_0)
2246                 e1000_enter_82542_rst(adapter);
2247
2248         /* load the first 14 multicast address into the exact filters 1-14
2249          * RAR 0 is used for the station MAC adddress
2250          * if there are not 14 addresses, go ahead and clear the filters
2251          * -- with 82571 controllers only 0-13 entries are filled here
2252          */
2253         mc_ptr = netdev->mc_list;
2254
2255         for(i = 1; i < rar_entries; i++) {
2256                 if (mc_ptr) {
2257                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2258                         mc_ptr = mc_ptr->next;
2259                 } else {
2260                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2261                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2262                 }
2263         }
2264
2265         /* clear the old settings from the multicast hash table */
2266
2267         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2268                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2269
2270         /* load any remaining addresses into the hash table */
2271
2272         for(; mc_ptr; mc_ptr = mc_ptr->next) {
2273                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2274                 e1000_mta_set(hw, hash_value);
2275         }
2276
2277         if(hw->mac_type == e1000_82542_rev2_0)
2278                 e1000_leave_82542_rst(adapter);
2279 }
2280
2281 /* Need to wait a few seconds after link up to get diagnostic information from
2282  * the phy */
2283
2284 static void
2285 e1000_update_phy_info(unsigned long data)
2286 {
2287         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2288         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2289 }
2290
2291 /**
2292  * e1000_82547_tx_fifo_stall - Timer Call-back
2293  * @data: pointer to adapter cast into an unsigned long
2294  **/
2295
2296 static void
2297 e1000_82547_tx_fifo_stall(unsigned long data)
2298 {
2299         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2300         struct net_device *netdev = adapter->netdev;
2301         uint32_t tctl;
2302
2303         if(atomic_read(&adapter->tx_fifo_stall)) {
2304                 if((E1000_READ_REG(&adapter->hw, TDT) ==
2305                     E1000_READ_REG(&adapter->hw, TDH)) &&
2306                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2307                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2308                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2309                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2310                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2311                         E1000_WRITE_REG(&adapter->hw, TCTL,
2312                                         tctl & ~E1000_TCTL_EN);
2313                         E1000_WRITE_REG(&adapter->hw, TDFT,
2314                                         adapter->tx_head_addr);
2315                         E1000_WRITE_REG(&adapter->hw, TDFH,
2316                                         adapter->tx_head_addr);
2317                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2318                                         adapter->tx_head_addr);
2319                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2320                                         adapter->tx_head_addr);
2321                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2322                         E1000_WRITE_FLUSH(&adapter->hw);
2323
2324                         adapter->tx_fifo_head = 0;
2325                         atomic_set(&adapter->tx_fifo_stall, 0);
2326                         netif_wake_queue(netdev);
2327                 } else {
2328                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2329                 }
2330         }
2331 }
2332
2333 /**
2334  * e1000_watchdog - Timer Call-back
2335  * @data: pointer to adapter cast into an unsigned long
2336  **/
2337 static void
2338 e1000_watchdog(unsigned long data)
2339 {
2340         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2341
2342         /* Do the rest outside of interrupt context */
2343         schedule_work(&adapter->watchdog_task);
2344 }
2345
2346 static void
2347 e1000_watchdog_task(struct e1000_adapter *adapter)
2348 {
2349         struct net_device *netdev = adapter->netdev;
2350         struct e1000_tx_ring *txdr = adapter->tx_ring;
2351         uint32_t link;
2352
2353         e1000_check_for_link(&adapter->hw);
2354         if (adapter->hw.mac_type == e1000_82573) {
2355                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2356                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2357                         e1000_update_mng_vlan(adapter);
2358         }
2359
2360         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2361            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2362                 link = !adapter->hw.serdes_link_down;
2363         else
2364                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2365
2366         if(link) {
2367                 if(!netif_carrier_ok(netdev)) {
2368                         e1000_get_speed_and_duplex(&adapter->hw,
2369                                                    &adapter->link_speed,
2370                                                    &adapter->link_duplex);
2371
2372                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2373                                adapter->link_speed,
2374                                adapter->link_duplex == FULL_DUPLEX ?
2375                                "Full Duplex" : "Half Duplex");
2376
2377                         /* tweak tx_queue_len according to speed/duplex */
2378                         netdev->tx_queue_len = adapter->tx_queue_len;
2379                         adapter->tx_timeout_factor = 1;
2380                         if (adapter->link_duplex == HALF_DUPLEX) {
2381                                 switch (adapter->link_speed) {
2382                                 case SPEED_10:
2383                                         netdev->tx_queue_len = 10;
2384                                         adapter->tx_timeout_factor = 8;
2385                                         break;
2386                                 case SPEED_100:
2387                                         netdev->tx_queue_len = 100;
2388                                         break;
2389                                 }
2390                         }
2391
2392                         netif_carrier_on(netdev);
2393                         netif_wake_queue(netdev);
2394                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2395                         adapter->smartspeed = 0;
2396                 }
2397         } else {
2398                 if(netif_carrier_ok(netdev)) {
2399                         adapter->link_speed = 0;
2400                         adapter->link_duplex = 0;
2401                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2402                         netif_carrier_off(netdev);
2403                         netif_stop_queue(netdev);
2404                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2405                 }
2406
2407                 e1000_smartspeed(adapter);
2408         }
2409
2410         e1000_update_stats(adapter);
2411
2412         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2413         adapter->tpt_old = adapter->stats.tpt;
2414         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2415         adapter->colc_old = adapter->stats.colc;
2416
2417         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2418         adapter->gorcl_old = adapter->stats.gorcl;
2419         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2420         adapter->gotcl_old = adapter->stats.gotcl;
2421
2422         e1000_update_adaptive(&adapter->hw);
2423
2424 #ifdef CONFIG_E1000_MQ
2425         txdr = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2426 #endif
2427         if (!netif_carrier_ok(netdev)) {
2428                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2429                         /* We've lost link, so the controller stops DMA,
2430                          * but we've got queued Tx work that's never going
2431                          * to get done, so reset controller to flush Tx.
2432                          * (Do the reset outside of interrupt context). */
2433                         schedule_work(&adapter->tx_timeout_task);
2434                 }
2435         }
2436
2437         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2438         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2439                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2440                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2441                  * else is between 2000-8000. */
2442                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2443                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2444                         adapter->gotcl - adapter->gorcl :
2445                         adapter->gorcl - adapter->gotcl) / 10000;
2446                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2447                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2448         }
2449
2450         /* Cause software interrupt to ensure rx ring is cleaned */
2451         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2452
2453         /* Force detection of hung controller every watchdog period */
2454         adapter->detect_tx_hung = TRUE;
2455
2456         /* With 82571 controllers, LAA may be overwritten due to controller
2457          * reset from the other port. Set the appropriate LAA in RAR[0] */
2458         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2459                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2460
2461         /* Reset the timer */
2462         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2463 }
2464
2465 #define E1000_TX_FLAGS_CSUM             0x00000001
2466 #define E1000_TX_FLAGS_VLAN             0x00000002
2467 #define E1000_TX_FLAGS_TSO              0x00000004
2468 #define E1000_TX_FLAGS_IPV4             0x00000008
2469 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2470 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2471
2472 static inline int
2473 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2474           struct sk_buff *skb)
2475 {
2476 #ifdef NETIF_F_TSO
2477         struct e1000_context_desc *context_desc;
2478         struct e1000_buffer *buffer_info;
2479         unsigned int i;
2480         uint32_t cmd_length = 0;
2481         uint16_t ipcse = 0, tucse, mss;
2482         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2483         int err;
2484
2485         if(skb_shinfo(skb)->tso_size) {
2486                 if (skb_header_cloned(skb)) {
2487                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2488                         if (err)
2489                                 return err;
2490                 }
2491
2492                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2493                 mss = skb_shinfo(skb)->tso_size;
2494                 if(skb->protocol == ntohs(ETH_P_IP)) {
2495                         skb->nh.iph->tot_len = 0;
2496                         skb->nh.iph->check = 0;
2497                         skb->h.th->check =
2498                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2499                                                    skb->nh.iph->daddr,
2500                                                    0,
2501                                                    IPPROTO_TCP,
2502                                                    0);
2503                         cmd_length = E1000_TXD_CMD_IP;
2504                         ipcse = skb->h.raw - skb->data - 1;
2505 #ifdef NETIF_F_TSO_IPV6
2506                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2507                         skb->nh.ipv6h->payload_len = 0;
2508                         skb->h.th->check =
2509                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2510                                                  &skb->nh.ipv6h->daddr,
2511                                                  0,
2512                                                  IPPROTO_TCP,
2513                                                  0);
2514                         ipcse = 0;
2515 #endif
2516                 }
2517                 ipcss = skb->nh.raw - skb->data;
2518                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2519                 tucss = skb->h.raw - skb->data;
2520                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2521                 tucse = 0;
2522
2523                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2524                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2525
2526                 i = tx_ring->next_to_use;
2527                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2528                 buffer_info = &tx_ring->buffer_info[i];
2529
2530                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2531                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2532                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2533                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2534                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2535                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2536                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2537                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2538                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2539
2540                 buffer_info->time_stamp = jiffies;
2541
2542                 if (++i == tx_ring->count) i = 0;
2543                 tx_ring->next_to_use = i;
2544
2545                 return 1;
2546         }
2547 #endif
2548
2549         return 0;
2550 }
2551
2552 static inline boolean_t
2553 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2554               struct sk_buff *skb)
2555 {
2556         struct e1000_context_desc *context_desc;
2557         struct e1000_buffer *buffer_info;
2558         unsigned int i;
2559         uint8_t css;
2560
2561         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2562                 css = skb->h.raw - skb->data;
2563
2564                 i = tx_ring->next_to_use;
2565                 buffer_info = &tx_ring->buffer_info[i];
2566                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2567
2568                 context_desc->upper_setup.tcp_fields.tucss = css;
2569                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2570                 context_desc->upper_setup.tcp_fields.tucse = 0;
2571                 context_desc->tcp_seg_setup.data = 0;
2572                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2573
2574                 buffer_info->time_stamp = jiffies;
2575
2576                 if (unlikely(++i == tx_ring->count)) i = 0;
2577                 tx_ring->next_to_use = i;
2578
2579                 return TRUE;
2580         }
2581
2582         return FALSE;
2583 }
2584
2585 #define E1000_MAX_TXD_PWR       12
2586 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2587
2588 static inline int
2589 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2590              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2591              unsigned int nr_frags, unsigned int mss)
2592 {
2593         struct e1000_buffer *buffer_info;
2594         unsigned int len = skb->len;
2595         unsigned int offset = 0, size, count = 0, i;
2596         unsigned int f;
2597         len -= skb->data_len;
2598
2599         i = tx_ring->next_to_use;
2600
2601         while(len) {
2602                 buffer_info = &tx_ring->buffer_info[i];
2603                 size = min(len, max_per_txd);
2604 #ifdef NETIF_F_TSO
2605                 /* Workaround for Controller erratum --
2606                  * descriptor for non-tso packet in a linear SKB that follows a
2607                  * tso gets written back prematurely before the data is fully
2608                  * DMAd to the controller */
2609                 if (!skb->data_len && tx_ring->last_tx_tso &&
2610                                 !skb_shinfo(skb)->tso_size) {
2611                         tx_ring->last_tx_tso = 0;
2612                         size -= 4;
2613                 }
2614
2615                 /* Workaround for premature desc write-backs
2616                  * in TSO mode.  Append 4-byte sentinel desc */
2617                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2618                         size -= 4;
2619 #endif
2620                 /* work-around for errata 10 and it applies
2621                  * to all controllers in PCI-X mode
2622                  * The fix is to make sure that the first descriptor of a
2623                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2624                  */
2625                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2626                                 (size > 2015) && count == 0))
2627                         size = 2015;
2628
2629                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2630                  * terminating buffers within evenly-aligned dwords. */
2631                 if(unlikely(adapter->pcix_82544 &&
2632                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2633                    size > 4))
2634                         size -= 4;
2635
2636                 buffer_info->length = size;
2637                 buffer_info->dma =
2638                         pci_map_single(adapter->pdev,
2639                                 skb->data + offset,
2640                                 size,
2641                                 PCI_DMA_TODEVICE);
2642                 buffer_info->time_stamp = jiffies;
2643
2644                 len -= size;
2645                 offset += size;
2646                 count++;
2647                 if(unlikely(++i == tx_ring->count)) i = 0;
2648         }
2649
2650         for(f = 0; f < nr_frags; f++) {
2651                 struct skb_frag_struct *frag;
2652
2653                 frag = &skb_shinfo(skb)->frags[f];
2654                 len = frag->size;
2655                 offset = frag->page_offset;
2656
2657                 while(len) {
2658                         buffer_info = &tx_ring->buffer_info[i];
2659                         size = min(len, max_per_txd);
2660 #ifdef NETIF_F_TSO
2661                         /* Workaround for premature desc write-backs
2662                          * in TSO mode.  Append 4-byte sentinel desc */
2663                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2664                                 size -= 4;
2665 #endif
2666                         /* Workaround for potential 82544 hang in PCI-X.
2667                          * Avoid terminating buffers within evenly-aligned
2668                          * dwords. */
2669                         if(unlikely(adapter->pcix_82544 &&
2670                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2671                            size > 4))
2672                                 size -= 4;
2673
2674                         buffer_info->length = size;
2675                         buffer_info->dma =
2676                                 pci_map_page(adapter->pdev,
2677                                         frag->page,
2678                                         offset,
2679                                         size,
2680                                         PCI_DMA_TODEVICE);
2681                         buffer_info->time_stamp = jiffies;
2682
2683                         len -= size;
2684                         offset += size;
2685                         count++;
2686                         if(unlikely(++i == tx_ring->count)) i = 0;
2687                 }
2688         }
2689
2690         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2691         tx_ring->buffer_info[i].skb = skb;
2692         tx_ring->buffer_info[first].next_to_watch = i;
2693
2694         return count;
2695 }
2696
2697 static inline void
2698 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2699                int tx_flags, int count)
2700 {
2701         struct e1000_tx_desc *tx_desc = NULL;
2702         struct e1000_buffer *buffer_info;
2703         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2704         unsigned int i;
2705
2706         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2707                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2708                              E1000_TXD_CMD_TSE;
2709                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2710
2711                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2712                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2713         }
2714
2715         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2716                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2717                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2718         }
2719
2720         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2721                 txd_lower |= E1000_TXD_CMD_VLE;
2722                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2723         }
2724
2725         i = tx_ring->next_to_use;
2726
2727         while(count--) {
2728                 buffer_info = &tx_ring->buffer_info[i];
2729                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2730                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2731                 tx_desc->lower.data =
2732                         cpu_to_le32(txd_lower | buffer_info->length);
2733                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2734                 if(unlikely(++i == tx_ring->count)) i = 0;
2735         }
2736
2737         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2738
2739         /* Force memory writes to complete before letting h/w
2740          * know there are new descriptors to fetch.  (Only
2741          * applicable for weak-ordered memory model archs,
2742          * such as IA-64). */
2743         wmb();
2744
2745         tx_ring->next_to_use = i;
2746         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2747 }
2748
2749 /**
2750  * 82547 workaround to avoid controller hang in half-duplex environment.
2751  * The workaround is to avoid queuing a large packet that would span
2752  * the internal Tx FIFO ring boundary by notifying the stack to resend
2753  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2754  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2755  * to the beginning of the Tx FIFO.
2756  **/
2757
2758 #define E1000_FIFO_HDR                  0x10
2759 #define E1000_82547_PAD_LEN             0x3E0
2760
2761 static inline int
2762 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2763 {
2764         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2765         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2766
2767         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2768
2769         if(adapter->link_duplex != HALF_DUPLEX)
2770                 goto no_fifo_stall_required;
2771
2772         if(atomic_read(&adapter->tx_fifo_stall))
2773                 return 1;
2774
2775         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2776                 atomic_set(&adapter->tx_fifo_stall, 1);
2777                 return 1;
2778         }
2779
2780 no_fifo_stall_required:
2781         adapter->tx_fifo_head += skb_fifo_len;
2782         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2783                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2784         return 0;
2785 }
2786
2787 #define MINIMUM_DHCP_PACKET_SIZE 282
2788 static inline int
2789 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2790 {
2791         struct e1000_hw *hw =  &adapter->hw;
2792         uint16_t length, offset;
2793         if(vlan_tx_tag_present(skb)) {
2794                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2795                         ( adapter->hw.mng_cookie.status &
2796                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2797                         return 0;
2798         }
2799         if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2800                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2801                 if((htons(ETH_P_IP) == eth->h_proto)) {
2802                         const struct iphdr *ip =
2803                                 (struct iphdr *)((uint8_t *)skb->data+14);
2804                         if(IPPROTO_UDP == ip->protocol) {
2805                                 struct udphdr *udp =
2806                                         (struct udphdr *)((uint8_t *)ip +
2807                                                 (ip->ihl << 2));
2808                                 if(ntohs(udp->dest) == 67) {
2809                                         offset = (uint8_t *)udp + 8 - skb->data;
2810                                         length = skb->len - offset;
2811
2812                                         return e1000_mng_write_dhcp_info(hw,
2813                                                         (uint8_t *)udp + 8,
2814                                                         length);
2815                                 }
2816                         }
2817                 }
2818         }
2819         return 0;
2820 }
2821
2822 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2823 static int
2824 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2825 {
2826         struct e1000_adapter *adapter = netdev_priv(netdev);
2827         struct e1000_tx_ring *tx_ring;
2828         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2829         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2830         unsigned int tx_flags = 0;
2831         unsigned int len = skb->len;
2832         unsigned long flags;
2833         unsigned int nr_frags = 0;
2834         unsigned int mss = 0;
2835         int count = 0;
2836         int tso;
2837         unsigned int f;
2838         len -= skb->data_len;
2839
2840 #ifdef CONFIG_E1000_MQ
2841         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2842 #else
2843         tx_ring = adapter->tx_ring;
2844 #endif
2845
2846         if (unlikely(skb->len <= 0)) {
2847                 dev_kfree_skb_any(skb);
2848                 return NETDEV_TX_OK;
2849         }
2850
2851 #ifdef NETIF_F_TSO
2852         mss = skb_shinfo(skb)->tso_size;
2853         /* The controller does a simple calculation to
2854          * make sure there is enough room in the FIFO before
2855          * initiating the DMA for each buffer.  The calc is:
2856          * 4 = ceil(buffer len/mss).  To make sure we don't
2857          * overrun the FIFO, adjust the max buffer len if mss
2858          * drops. */
2859         if(mss) {
2860                 uint8_t hdr_len;
2861                 max_per_txd = min(mss << 2, max_per_txd);
2862                 max_txd_pwr = fls(max_per_txd) - 1;
2863
2864         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2865          * points to just header, pull a few bytes of payload from
2866          * frags into skb->data */
2867                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2868                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2869                         (adapter->hw.mac_type == e1000_82571 ||
2870                         adapter->hw.mac_type == e1000_82572)) {
2871                         unsigned int pull_size;
2872                         pull_size = min((unsigned int)4, skb->data_len);
2873                         if (!__pskb_pull_tail(skb, pull_size)) {
2874                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2875                                 dev_kfree_skb_any(skb);
2876                                 return -EFAULT;
2877                         }
2878                         len = skb->len - skb->data_len;
2879                 }
2880         }
2881
2882         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2883         /* reserve a descriptor for the offload context */
2884                 count++;
2885         count++;
2886 #else
2887         if(skb->ip_summed == CHECKSUM_HW)
2888                 count++;
2889 #endif
2890
2891 #ifdef NETIF_F_TSO
2892         /* Controller Erratum workaround */
2893         if (!skb->data_len && tx_ring->last_tx_tso &&
2894                 !skb_shinfo(skb)->tso_size)
2895                 count++;
2896 #endif
2897
2898         count += TXD_USE_COUNT(len, max_txd_pwr);
2899
2900         if(adapter->pcix_82544)
2901                 count++;
2902
2903         /* work-around for errata 10 and it applies to all controllers
2904          * in PCI-X mode, so add one more descriptor to the count
2905          */
2906         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2907                         (len > 2015)))
2908                 count++;
2909
2910         nr_frags = skb_shinfo(skb)->nr_frags;
2911         for(f = 0; f < nr_frags; f++)
2912                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2913                                        max_txd_pwr);
2914         if(adapter->pcix_82544)
2915                 count += nr_frags;
2916
2917         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2918                 e1000_transfer_dhcp_info(adapter, skb);
2919
2920         local_irq_save(flags);
2921         if (!spin_trylock(&tx_ring->tx_lock)) {
2922                 /* Collision - tell upper layer to requeue */
2923                 local_irq_restore(flags);
2924                 return NETDEV_TX_LOCKED;
2925         }
2926
2927         /* need: count + 2 desc gap to keep tail from touching
2928          * head, otherwise try next time */
2929         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2930                 netif_stop_queue(netdev);
2931                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2932                 return NETDEV_TX_BUSY;
2933         }
2934
2935         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2936                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2937                         netif_stop_queue(netdev);
2938                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2939                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2940                         return NETDEV_TX_BUSY;
2941                 }
2942         }
2943
2944         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2945                 tx_flags |= E1000_TX_FLAGS_VLAN;
2946                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2947         }
2948
2949         first = tx_ring->next_to_use;
2950
2951         tso = e1000_tso(adapter, tx_ring, skb);
2952         if (tso < 0) {
2953                 dev_kfree_skb_any(skb);
2954                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2955                 return NETDEV_TX_OK;
2956         }
2957
2958         if (likely(tso)) {
2959                 tx_ring->last_tx_tso = 1;
2960                 tx_flags |= E1000_TX_FLAGS_TSO;
2961         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2962                 tx_flags |= E1000_TX_FLAGS_CSUM;
2963
2964         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2965          * 82571 hardware supports TSO capabilities for IPv6 as well...
2966          * no longer assume, we must. */
2967         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2968                 tx_flags |= E1000_TX_FLAGS_IPV4;
2969
2970         e1000_tx_queue(adapter, tx_ring, tx_flags,
2971                        e1000_tx_map(adapter, tx_ring, skb, first,
2972                                     max_per_txd, nr_frags, mss));
2973
2974         netdev->trans_start = jiffies;
2975
2976         /* Make sure there is space in the ring for the next send. */
2977         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2978                 netif_stop_queue(netdev);
2979
2980         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2981         return NETDEV_TX_OK;
2982 }
2983
2984 /**
2985  * e1000_tx_timeout - Respond to a Tx Hang
2986  * @netdev: network interface device structure
2987  **/
2988
2989 static void
2990 e1000_tx_timeout(struct net_device *netdev)
2991 {
2992         struct e1000_adapter *adapter = netdev_priv(netdev);
2993
2994         /* Do the reset outside of interrupt context */
2995         schedule_work(&adapter->tx_timeout_task);
2996 }
2997
2998 static void
2999 e1000_tx_timeout_task(struct net_device *netdev)
3000 {
3001         struct e1000_adapter *adapter = netdev_priv(netdev);
3002
3003         adapter->tx_timeout_count++;
3004         e1000_down(adapter);
3005         e1000_up(adapter);
3006 }
3007
3008 /**
3009  * e1000_get_stats - Get System Network Statistics
3010  * @netdev: network interface device structure
3011  *
3012  * Returns the address of the device statistics structure.
3013  * The statistics are actually updated from the timer callback.
3014  **/
3015
3016 static struct net_device_stats *
3017 e1000_get_stats(struct net_device *netdev)
3018 {
3019         struct e1000_adapter *adapter = netdev_priv(netdev);
3020
3021         /* only return the current stats */
3022         return &adapter->net_stats;
3023 }
3024
3025 /**
3026  * e1000_change_mtu - Change the Maximum Transfer Unit
3027  * @netdev: network interface device structure
3028  * @new_mtu: new value for maximum frame size
3029  *
3030  * Returns 0 on success, negative on failure
3031  **/
3032
3033 static int
3034 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3035 {
3036         struct e1000_adapter *adapter = netdev_priv(netdev);
3037         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3038
3039         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3040                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3041                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3042                 return -EINVAL;
3043         }
3044
3045         /* Adapter-specific max frame size limits. */
3046         switch (adapter->hw.mac_type) {
3047         case e1000_82542_rev2_0:
3048         case e1000_82542_rev2_1:
3049         case e1000_82573:
3050                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3051                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3052                         return -EINVAL;
3053                 }
3054                 break;
3055         case e1000_82571:
3056         case e1000_82572:
3057 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3058                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3059                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3060                         return -EINVAL;
3061                 }
3062                 break;
3063         default:
3064                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3065                 break;
3066         }
3067
3068         /* since the driver code now supports splitting a packet across
3069          * multiple descriptors, most of the fifo related limitations on
3070          * jumbo frame traffic have gone away.
3071          * simply use 2k descriptors for everything.
3072          *
3073          * NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3074          * means we reserve 2 more, this pushes us to allocate from the next
3075          * larger slab size
3076          * i.e. RXBUFFER_2048 --> size-4096 slab */
3077
3078         /* recent hardware supports 1KB granularity */
3079         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3080                 adapter->rx_buffer_len =
3081                     ((max_frame < E1000_RXBUFFER_2048) ?
3082                         max_frame : E1000_RXBUFFER_2048);
3083                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3084         } else
3085                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3086
3087         netdev->mtu = new_mtu;
3088
3089         if(netif_running(netdev)) {
3090                 e1000_down(adapter);
3091                 e1000_up(adapter);
3092         }
3093
3094         adapter->hw.max_frame_size = max_frame;
3095
3096         return 0;
3097 }
3098
3099 /**
3100  * e1000_update_stats - Update the board statistics counters
3101  * @adapter: board private structure
3102  **/
3103
3104 void
3105 e1000_update_stats(struct e1000_adapter *adapter)
3106 {
3107         struct e1000_hw *hw = &adapter->hw;
3108         unsigned long flags;
3109         uint16_t phy_tmp;
3110
3111 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3112
3113         spin_lock_irqsave(&adapter->stats_lock, flags);
3114
3115         /* these counters are modified from e1000_adjust_tbi_stats,
3116          * called from the interrupt context, so they must only
3117          * be written while holding adapter->stats_lock
3118          */
3119
3120         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3121         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3122         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3123         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3124         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3125         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3126         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3127         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3128         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3129         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3130         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3131         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3132         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3133
3134         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3135         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3136         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3137         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3138         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3139         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3140         adapter->stats.dc += E1000_READ_REG(hw, DC);
3141         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3142         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3143         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3144         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3145         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3146         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3147         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3148         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3149         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3150         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3151         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3152         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3153         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3154         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3155         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3156         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3157         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3158         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3159         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3160         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3161         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3162         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3163         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3164         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3165         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3166         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3167         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3168
3169         /* used for adaptive IFS */
3170
3171         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3172         adapter->stats.tpt += hw->tx_packet_delta;
3173         hw->collision_delta = E1000_READ_REG(hw, COLC);
3174         adapter->stats.colc += hw->collision_delta;
3175
3176         if(hw->mac_type >= e1000_82543) {
3177                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3178                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3179                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3180                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3181                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3182                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3183         }
3184         if(hw->mac_type > e1000_82547_rev_2) {
3185                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3186                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3187                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3188                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3189                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3190                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3191                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3192                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3193                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3194         }
3195
3196         /* Fill out the OS statistics structure */
3197
3198         adapter->net_stats.rx_packets = adapter->stats.gprc;
3199         adapter->net_stats.tx_packets = adapter->stats.gptc;
3200         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3201         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3202         adapter->net_stats.multicast = adapter->stats.mprc;
3203         adapter->net_stats.collisions = adapter->stats.colc;
3204
3205         /* Rx Errors */
3206
3207         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3208                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3209                 adapter->stats.rlec + adapter->stats.cexterr;
3210         adapter->net_stats.rx_dropped = 0;
3211         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3212         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3213         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3214         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3215
3216         /* Tx Errors */
3217
3218         adapter->net_stats.tx_errors = adapter->stats.ecol +
3219                                        adapter->stats.latecol;
3220         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3221         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3222         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3223
3224         /* Tx Dropped needs to be maintained elsewhere */
3225
3226         /* Phy Stats */
3227
3228         if(hw->media_type == e1000_media_type_copper) {
3229                 if((adapter->link_speed == SPEED_1000) &&
3230                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3231                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3232                         adapter->phy_stats.idle_errors += phy_tmp;
3233                 }
3234
3235                 if((hw->mac_type <= e1000_82546) &&
3236                    (hw->phy_type == e1000_phy_m88) &&
3237                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3238                         adapter->phy_stats.receive_errors += phy_tmp;
3239         }
3240
3241         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3242 }
3243
3244 #ifdef CONFIG_E1000_MQ
3245 void
3246 e1000_rx_schedule(void *data)
3247 {
3248         struct net_device *poll_dev, *netdev = data;
3249         struct e1000_adapter *adapter = netdev->priv;
3250         int this_cpu = get_cpu();
3251
3252         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3253         if (poll_dev == NULL) {
3254                 put_cpu();
3255                 return;
3256         }
3257
3258         if (likely(netif_rx_schedule_prep(poll_dev)))
3259                 __netif_rx_schedule(poll_dev);
3260         else
3261                 e1000_irq_enable(adapter);
3262
3263         put_cpu();
3264 }
3265 #endif
3266
3267 /**
3268  * e1000_intr - Interrupt Handler
3269  * @irq: interrupt number
3270  * @data: pointer to a network interface device structure
3271  * @pt_regs: CPU registers structure
3272  **/
3273
3274 static irqreturn_t
3275 e1000_intr(int irq, void *data, struct pt_regs *regs)
3276 {
3277         struct net_device *netdev = data;
3278         struct e1000_adapter *adapter = netdev_priv(netdev);
3279         struct e1000_hw *hw = &adapter->hw;
3280         uint32_t icr = E1000_READ_REG(hw, ICR);
3281 #ifndef CONFIG_E1000_NAPI
3282         int i;
3283 #else
3284         /* Interrupt Auto-Mask...upon reading ICR,
3285          * interrupts are masked.  No need for the
3286          * IMC write, but it does mean we should
3287          * account for it ASAP. */
3288         if (likely(hw->mac_type >= e1000_82571))
3289                 atomic_inc(&adapter->irq_sem);
3290 #endif
3291
3292         if (unlikely(!icr)) {
3293 #ifdef CONFIG_E1000_NAPI
3294                 if (hw->mac_type >= e1000_82571)
3295                         e1000_irq_enable(adapter);
3296 #endif
3297                 return IRQ_NONE;  /* Not our interrupt */
3298         }
3299
3300         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3301                 hw->get_link_status = 1;
3302                 mod_timer(&adapter->watchdog_timer, jiffies);
3303         }
3304
3305 #ifdef CONFIG_E1000_NAPI
3306         if (unlikely(hw->mac_type < e1000_82571)) {
3307                 atomic_inc(&adapter->irq_sem);
3308                 E1000_WRITE_REG(hw, IMC, ~0);
3309                 E1000_WRITE_FLUSH(hw);
3310         }
3311 #ifdef CONFIG_E1000_MQ
3312         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3313                 /* We must setup the cpumask once count == 0 since
3314                  * each cpu bit is cleared when the work is done. */
3315                 adapter->rx_sched_call_data.cpumask = adapter->cpumask;
3316                 atomic_add(adapter->num_rx_queues - 1, &adapter->irq_sem);
3317                 atomic_set(&adapter->rx_sched_call_data.count,
3318                            adapter->num_rx_queues);
3319                 smp_call_async_mask(&adapter->rx_sched_call_data);
3320         } else {
3321                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3322         }
3323 #else /* if !CONFIG_E1000_MQ */
3324         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3325                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3326         else
3327                 e1000_irq_enable(adapter);
3328 #endif /* CONFIG_E1000_MQ */
3329
3330 #else /* if !CONFIG_E1000_NAPI */
3331         /* Writing IMC and IMS is needed for 82547.
3332            Due to Hub Link bus being occupied, an interrupt
3333            de-assertion message is not able to be sent.
3334            When an interrupt assertion message is generated later,
3335            two messages are re-ordered and sent out.
3336            That causes APIC to think 82547 is in de-assertion
3337            state, while 82547 is in assertion state, resulting
3338            in dead lock. Writing IMC forces 82547 into
3339            de-assertion state.
3340         */
3341         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3342                 atomic_inc(&adapter->irq_sem);
3343                 E1000_WRITE_REG(hw, IMC, ~0);
3344         }
3345
3346         for(i = 0; i < E1000_MAX_INTR; i++)
3347                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3348                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3349                         break;
3350
3351         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3352                 e1000_irq_enable(adapter);
3353
3354 #endif /* CONFIG_E1000_NAPI */
3355
3356         return IRQ_HANDLED;
3357 }
3358
3359 #ifdef CONFIG_E1000_NAPI
3360 /**
3361  * e1000_clean - NAPI Rx polling callback
3362  * @adapter: board private structure
3363  **/
3364
3365 static int
3366 e1000_clean(struct net_device *poll_dev, int *budget)
3367 {
3368         struct e1000_adapter *adapter;
3369         int work_to_do = min(*budget, poll_dev->quota);
3370         int tx_cleaned, i = 0, work_done = 0;
3371
3372         /* Must NOT use netdev_priv macro here. */
3373         adapter = poll_dev->priv;
3374
3375         /* Keep link state information with original netdev */
3376         if (!netif_carrier_ok(adapter->netdev))
3377                 goto quit_polling;
3378
3379         while (poll_dev != &adapter->polling_netdev[i]) {
3380                 i++;
3381                 if (unlikely(i == adapter->num_rx_queues))
3382                         BUG();
3383         }
3384
3385         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3386         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3387                           &work_done, work_to_do);
3388
3389         *budget -= work_done;
3390         poll_dev->quota -= work_done;
3391
3392         /* If no Tx and not enough Rx work done, exit the polling mode */
3393         if((!tx_cleaned && (work_done == 0)) ||
3394            !netif_running(adapter->netdev)) {
3395 quit_polling:
3396                 netif_rx_complete(poll_dev);
3397                 e1000_irq_enable(adapter);
3398                 return 0;
3399         }
3400
3401         return 1;
3402 }
3403
3404 #endif
3405 /**
3406  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3407  * @adapter: board private structure
3408  **/
3409
3410 static boolean_t
3411 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3412                    struct e1000_tx_ring *tx_ring)
3413 {
3414         struct net_device *netdev = adapter->netdev;
3415         struct e1000_tx_desc *tx_desc, *eop_desc;
3416         struct e1000_buffer *buffer_info;
3417         unsigned int i, eop;
3418         boolean_t cleaned = FALSE;
3419
3420         i = tx_ring->next_to_clean;
3421         eop = tx_ring->buffer_info[i].next_to_watch;
3422         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3423
3424         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3425                 for(cleaned = FALSE; !cleaned; ) {
3426                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3427                         buffer_info = &tx_ring->buffer_info[i];
3428                         cleaned = (i == eop);
3429
3430                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3431
3432                         tx_desc->buffer_addr = 0;
3433                         tx_desc->lower.data = 0;
3434                         tx_desc->upper.data = 0;
3435
3436                         if(unlikely(++i == tx_ring->count)) i = 0;
3437                 }
3438
3439 #ifdef CONFIG_E1000_MQ
3440                 tx_ring->tx_stats.packets++;
3441 #endif
3442
3443                 eop = tx_ring->buffer_info[i].next_to_watch;
3444                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3445         }
3446
3447         tx_ring->next_to_clean = i;
3448
3449         spin_lock(&tx_ring->tx_lock);
3450
3451         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3452                     netif_carrier_ok(netdev)))
3453                 netif_wake_queue(netdev);
3454
3455         spin_unlock(&tx_ring->tx_lock);
3456
3457         if (adapter->detect_tx_hung) {
3458                 /* Detect a transmit hang in hardware, this serializes the
3459                  * check with the clearing of time_stamp and movement of i */
3460                 adapter->detect_tx_hung = FALSE;
3461                 if (tx_ring->buffer_info[eop].dma &&
3462                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3463                                adapter->tx_timeout_factor * HZ)
3464                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3465                          E1000_STATUS_TXOFF)) {
3466
3467                         /* detected Tx unit hang */
3468                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3469                                         "  Tx Queue             <%lu>\n"
3470                                         "  TDH                  <%x>\n"
3471                                         "  TDT                  <%x>\n"
3472                                         "  next_to_use          <%x>\n"
3473                                         "  next_to_clean        <%x>\n"
3474                                         "buffer_info[next_to_clean]\n"
3475                                         "  time_stamp           <%lx>\n"
3476                                         "  next_to_watch        <%x>\n"
3477                                         "  jiffies              <%lx>\n"
3478                                         "  next_to_watch.status <%x>\n",
3479                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3480                                         sizeof(struct e1000_tx_ring)),
3481                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3482                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3483                                 tx_ring->next_to_use,
3484                                 tx_ring->next_to_clean,
3485                                 tx_ring->buffer_info[eop].time_stamp,
3486                                 eop,
3487                                 jiffies,
3488                                 eop_desc->upper.fields.status);
3489                         netif_stop_queue(netdev);
3490                 }
3491         }
3492         return cleaned;
3493 }
3494
3495 /**
3496  * e1000_rx_checksum - Receive Checksum Offload for 82543
3497  * @adapter:     board private structure
3498  * @status_err:  receive descriptor status and error fields
3499  * @csum:        receive descriptor csum field
3500  * @sk_buff:     socket buffer with received data
3501  **/
3502
3503 static inline void
3504 e1000_rx_checksum(struct e1000_adapter *adapter,
3505                   uint32_t status_err, uint32_t csum,
3506                   struct sk_buff *skb)
3507 {
3508         uint16_t status = (uint16_t)status_err;
3509         uint8_t errors = (uint8_t)(status_err >> 24);
3510         skb->ip_summed = CHECKSUM_NONE;
3511
3512         /* 82543 or newer only */
3513         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3514         /* Ignore Checksum bit is set */
3515         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3516         /* TCP/UDP checksum error bit is set */
3517         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3518                 /* let the stack verify checksum errors */
3519                 adapter->hw_csum_err++;
3520                 return;
3521         }
3522         /* TCP/UDP Checksum has not been calculated */
3523         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3524                 if(!(status & E1000_RXD_STAT_TCPCS))
3525                         return;
3526         } else {
3527                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3528                         return;
3529         }
3530         /* It must be a TCP or UDP packet with a valid checksum */
3531         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3532                 /* TCP checksum is good */
3533                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3534         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3535                 /* IP fragment with UDP payload */
3536                 /* Hardware complements the payload checksum, so we undo it
3537                  * and then put the value in host order for further stack use.
3538                  */
3539                 csum = ntohl(csum ^ 0xFFFF);
3540                 skb->csum = csum;
3541                 skb->ip_summed = CHECKSUM_HW;
3542         }
3543         adapter->hw_csum_good++;
3544 }
3545
3546 /**
3547  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3548  * @adapter: board private structure
3549  **/
3550
3551 static boolean_t
3552 #ifdef CONFIG_E1000_NAPI
3553 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3554                    struct e1000_rx_ring *rx_ring,
3555                    int *work_done, int work_to_do)
3556 #else
3557 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3558                    struct e1000_rx_ring *rx_ring)
3559 #endif
3560 {
3561         struct net_device *netdev = adapter->netdev;
3562         struct pci_dev *pdev = adapter->pdev;
3563         struct e1000_rx_desc *rx_desc;
3564         struct e1000_buffer *buffer_info;
3565         struct sk_buff *skb;
3566         unsigned long flags;
3567         uint32_t length;
3568         uint8_t last_byte;
3569         unsigned int i;
3570         boolean_t cleaned = FALSE;
3571         int cleaned_count = 0;
3572
3573         i = rx_ring->next_to_clean;
3574         rx_desc = E1000_RX_DESC(*rx_ring, i);
3575
3576         while(rx_desc->status & E1000_RXD_STAT_DD) {
3577                 buffer_info = &rx_ring->buffer_info[i];
3578 #ifdef CONFIG_E1000_NAPI
3579                 if(*work_done >= work_to_do)
3580                         break;
3581                 (*work_done)++;
3582 #endif
3583
3584                 cleaned = TRUE;
3585                 cleaned_count++;
3586                 pci_unmap_single(pdev, buffer_info->dma, buffer_info->length,
3587                                  PCI_DMA_FROMDEVICE);
3588
3589                 skb = buffer_info->skb;
3590                 length = le16_to_cpu(rx_desc->length);
3591
3592                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3593                         /* All receives must fit into a single buffer */
3594                         E1000_DBG("%s: Receive packet consumed multiple"
3595                                   " buffers\n", netdev->name);
3596                         dev_kfree_skb_irq(skb);
3597                         goto next_desc;
3598                 }
3599
3600                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3601                         last_byte = *(skb->data + length - 1);
3602                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3603                                       rx_desc->errors, length, last_byte)) {
3604                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3605                                 e1000_tbi_adjust_stats(&adapter->hw, &adapter->stats,
3606                                                        length, skb->data);
3607                                 spin_unlock_irqrestore(&adapter->stats_lock,
3608                                                        flags);
3609                                 length--;
3610                         } else {
3611                                 dev_kfree_skb_irq(skb);
3612                                 goto next_desc;
3613                         }
3614                 }
3615
3616                 /* Good Receive */
3617                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3618
3619                 /* Receive Checksum Offload */
3620                 e1000_rx_checksum(adapter, (uint32_t)(rx_desc->status) |
3621                                   ((uint32_t)(rx_desc->errors) << 24),
3622                                   rx_desc->csum, skb);
3623                 skb->protocol = eth_type_trans(skb, netdev);
3624 #ifdef CONFIG_E1000_NAPI
3625                 if(unlikely(adapter->vlgrp &&
3626                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3627                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3628                                                  le16_to_cpu(rx_desc->special) &
3629                                                  E1000_RXD_SPC_VLAN_MASK);
3630                 } else {
3631                         netif_receive_skb(skb);
3632                 }
3633 #else /* CONFIG_E1000_NAPI */
3634                 if(unlikely(adapter->vlgrp &&
3635                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3636                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3637                                         le16_to_cpu(rx_desc->special) &
3638                                         E1000_RXD_SPC_VLAN_MASK);
3639                 } else {
3640                         netif_rx(skb);
3641                 }
3642 #endif /* CONFIG_E1000_NAPI */
3643                 netdev->last_rx = jiffies;
3644 #ifdef CONFIG_E1000_MQ
3645                 rx_ring->rx_stats.packets++;
3646                 rx_ring->rx_stats.bytes += length;
3647 #endif
3648
3649 next_desc:
3650                 rx_desc->status = 0;
3651
3652                 /* return some buffers to hardware, one at a time is too slow */
3653                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3654                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3655                         cleaned_count = 0;
3656                 }
3657
3658         }
3659         rx_ring->next_to_clean = i;
3660
3661         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3662         if (cleaned_count)
3663                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3664
3665         return cleaned;
3666 }
3667
3668 /**
3669  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3670  * @adapter: board private structure
3671  **/
3672
3673 static boolean_t
3674 #ifdef CONFIG_E1000_NAPI
3675 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3676                       struct e1000_rx_ring *rx_ring,
3677                       int *work_done, int work_to_do)
3678 #else
3679 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3680                       struct e1000_rx_ring *rx_ring)
3681 #endif
3682 {
3683         union e1000_rx_desc_packet_split *rx_desc;
3684         struct net_device *netdev = adapter->netdev;
3685         struct pci_dev *pdev = adapter->pdev;
3686         struct e1000_buffer *buffer_info;
3687         struct e1000_ps_page *ps_page;
3688         struct e1000_ps_page_dma *ps_page_dma;
3689         struct sk_buff *skb;
3690         unsigned int i, j;
3691         uint32_t length, staterr;
3692         int cleaned_count = 0;
3693         boolean_t cleaned = FALSE;
3694
3695         i = rx_ring->next_to_clean;
3696         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3697         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3698
3699         while(staterr & E1000_RXD_STAT_DD) {
3700                 buffer_info = &rx_ring->buffer_info[i];
3701                 ps_page = &rx_ring->ps_page[i];
3702                 ps_page_dma = &rx_ring->ps_page_dma[i];
3703 #ifdef CONFIG_E1000_NAPI
3704                 if(unlikely(*work_done >= work_to_do))
3705                         break;
3706                 (*work_done)++;
3707 #endif
3708                 cleaned = TRUE;
3709                 cleaned_count++;
3710                 pci_unmap_single(pdev, buffer_info->dma,
3711                                  buffer_info->length,
3712                                  PCI_DMA_FROMDEVICE);
3713
3714                 skb = buffer_info->skb;
3715
3716                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3717                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3718                                   " the full packet\n", netdev->name);
3719                         dev_kfree_skb_irq(skb);
3720                         goto next_desc;
3721                 }
3722
3723                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3724                         dev_kfree_skb_irq(skb);
3725                         goto next_desc;
3726                 }
3727
3728                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3729
3730                 if(unlikely(!length)) {
3731                         E1000_DBG("%s: Last part of the packet spanning"
3732                                   " multiple descriptors\n", netdev->name);
3733                         dev_kfree_skb_irq(skb);
3734                         goto next_desc;
3735                 }
3736
3737                 /* Good Receive */
3738                 skb_put(skb, length);
3739
3740                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3741                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3742                                 break;
3743
3744                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3745                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3746                         ps_page_dma->ps_page_dma[j] = 0;
3747                         skb_shinfo(skb)->frags[j].page =
3748                                 ps_page->ps_page[j];
3749                         ps_page->ps_page[j] = NULL;
3750                         skb_shinfo(skb)->frags[j].page_offset = 0;
3751                         skb_shinfo(skb)->frags[j].size = length;
3752                         skb_shinfo(skb)->nr_frags++;
3753                         skb->len += length;
3754                         skb->data_len += length;
3755                 }
3756
3757                 e1000_rx_checksum(adapter, staterr,
3758                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3759                 skb->protocol = eth_type_trans(skb, netdev);
3760
3761                 if(likely(rx_desc->wb.upper.header_status &
3762                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3763                         adapter->rx_hdr_split++;
3764 #ifdef HAVE_RX_ZERO_COPY
3765                         skb_shinfo(skb)->zero_copy = TRUE;
3766 #endif
3767                 }
3768 #ifdef CONFIG_E1000_NAPI
3769                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3770                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3771                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3772                                 E1000_RXD_SPC_VLAN_MASK);
3773                 } else {
3774                         netif_receive_skb(skb);
3775                 }
3776 #else /* CONFIG_E1000_NAPI */
3777                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3778                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3779                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3780                                 E1000_RXD_SPC_VLAN_MASK);
3781                 } else {
3782                         netif_rx(skb);
3783                 }
3784 #endif /* CONFIG_E1000_NAPI */
3785                 netdev->last_rx = jiffies;
3786 #ifdef CONFIG_E1000_MQ
3787                 rx_ring->rx_stats.packets++;
3788                 rx_ring->rx_stats.bytes += length;
3789 #endif
3790
3791 next_desc:
3792                 rx_desc->wb.middle.status_error &= ~0xFF;
3793                 buffer_info->skb = NULL;
3794
3795                 /* return some buffers to hardware, one at a time is too slow */
3796                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3797                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3798                         cleaned_count = 0;
3799                 }
3800
3801                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3802         }
3803         rx_ring->next_to_clean = i;
3804
3805         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3806         if (cleaned_count)
3807                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3808
3809         return cleaned;
3810 }
3811
3812 /**
3813  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3814  * @adapter: address of board private structure
3815  **/
3816
3817 static void
3818 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3819                        struct e1000_rx_ring *rx_ring,
3820                        int cleaned_count)
3821 {
3822         struct net_device *netdev = adapter->netdev;
3823         struct pci_dev *pdev = adapter->pdev;
3824         struct e1000_rx_desc *rx_desc;
3825         struct e1000_buffer *buffer_info;
3826         struct sk_buff *skb;
3827         unsigned int i;
3828         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3829
3830         i = rx_ring->next_to_use;
3831         buffer_info = &rx_ring->buffer_info[i];
3832
3833         while(!buffer_info->skb) {
3834                 skb = dev_alloc_skb(bufsz);
3835
3836                 if(unlikely(!skb)) {
3837                         /* Better luck next round */
3838                         adapter->alloc_rx_buff_failed++;
3839                         break;
3840                 }
3841
3842                 /* Fix for errata 23, can't cross 64kB boundary */
3843                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3844                         struct sk_buff *oldskb = skb;
3845                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3846                                              "at %p\n", bufsz, skb->data);
3847                         /* Try again, without freeing the previous */
3848                         skb = dev_alloc_skb(bufsz);
3849                         /* Failed allocation, critical failure */
3850                         if (!skb) {
3851                                 dev_kfree_skb(oldskb);
3852                                 break;
3853                         }
3854
3855                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3856                                 /* give up */
3857                                 dev_kfree_skb(skb);
3858                                 dev_kfree_skb(oldskb);
3859                                 break; /* while !buffer_info->skb */
3860                         } else {
3861                                 /* Use new allocation */
3862                                 dev_kfree_skb(oldskb);
3863                         }
3864                 }
3865                 /* Make buffer alignment 2 beyond a 16 byte boundary
3866                  * this will result in a 16 byte aligned IP header after
3867                  * the 14 byte MAC header is removed
3868                  */
3869                 skb_reserve(skb, NET_IP_ALIGN);
3870
3871                 skb->dev = netdev;
3872
3873                 buffer_info->skb = skb;
3874                 buffer_info->length = adapter->rx_buffer_len;
3875                 buffer_info->dma = pci_map_single(pdev,
3876                                                   skb->data,
3877                                                   adapter->rx_buffer_len,
3878                                                   PCI_DMA_FROMDEVICE);
3879
3880                 /* Fix for errata 23, can't cross 64kB boundary */
3881                 if (!e1000_check_64k_bound(adapter,
3882                                         (void *)(unsigned long)buffer_info->dma,
3883                                         adapter->rx_buffer_len)) {
3884                         DPRINTK(RX_ERR, ERR,
3885                                 "dma align check failed: %u bytes at %p\n",
3886                                 adapter->rx_buffer_len,
3887                                 (void *)(unsigned long)buffer_info->dma);
3888                         dev_kfree_skb(skb);
3889                         buffer_info->skb = NULL;
3890
3891                         pci_unmap_single(pdev, buffer_info->dma,
3892                                          adapter->rx_buffer_len,
3893                                          PCI_DMA_FROMDEVICE);
3894
3895                         break; /* while !buffer_info->skb */
3896                 }
3897                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3898                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3899
3900                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3901                         /* Force memory writes to complete before letting h/w
3902                          * know there are new descriptors to fetch.  (Only
3903                          * applicable for weak-ordered memory model archs,
3904                          * such as IA-64). */
3905                         wmb();
3906                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3907                 }
3908
3909                 if(unlikely(++i == rx_ring->count)) i = 0;
3910                 buffer_info = &rx_ring->buffer_info[i];
3911         }
3912
3913         rx_ring->next_to_use = i;
3914 }
3915
3916 /**
3917  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3918  * @adapter: address of board private structure
3919  **/
3920
3921 static void
3922 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3923                           struct e1000_rx_ring *rx_ring,
3924                           int cleaned_count)
3925 {
3926         struct net_device *netdev = adapter->netdev;
3927         struct pci_dev *pdev = adapter->pdev;
3928         union e1000_rx_desc_packet_split *rx_desc;
3929         struct e1000_buffer *buffer_info;
3930         struct e1000_ps_page *ps_page;
3931         struct e1000_ps_page_dma *ps_page_dma;
3932         struct sk_buff *skb;
3933         unsigned int i, j;
3934
3935         i = rx_ring->next_to_use;
3936         buffer_info = &rx_ring->buffer_info[i];
3937         ps_page = &rx_ring->ps_page[i];
3938         ps_page_dma = &rx_ring->ps_page_dma[i];
3939
3940         while (cleaned_count--) {
3941                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3942
3943                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3944                         if (j < adapter->rx_ps_pages) {
3945                                 if (likely(!ps_page->ps_page[j])) {
3946                                         ps_page->ps_page[j] =
3947                                                 alloc_page(GFP_ATOMIC);
3948                                         if (unlikely(!ps_page->ps_page[j]))
3949                                                 goto no_buffers;
3950                                         ps_page_dma->ps_page_dma[j] =
3951                                                 pci_map_page(pdev,
3952                                                             ps_page->ps_page[j],
3953                                                             0, PAGE_SIZE,
3954                                                             PCI_DMA_FROMDEVICE);
3955                                 }
3956                                 /* Refresh the desc even if buffer_addrs didn't
3957                                  * change because each write-back erases
3958                                  * this info.
3959                                  */
3960                                 rx_desc->read.buffer_addr[j+1] =
3961                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3962                         } else
3963                                 rx_desc->read.buffer_addr[j+1] = ~0;
3964                 }
3965
3966                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3967
3968                 if(unlikely(!skb))
3969                         break;
3970
3971                 /* Make buffer alignment 2 beyond a 16 byte boundary
3972                  * this will result in a 16 byte aligned IP header after
3973                  * the 14 byte MAC header is removed
3974                  */
3975                 skb_reserve(skb, NET_IP_ALIGN);
3976
3977                 skb->dev = netdev;
3978
3979                 buffer_info->skb = skb;
3980                 buffer_info->length = adapter->rx_ps_bsize0;
3981                 buffer_info->dma = pci_map_single(pdev, skb->data,
3982                                                   adapter->rx_ps_bsize0,
3983                                                   PCI_DMA_FROMDEVICE);
3984
3985                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3986
3987                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3988                         /* Force memory writes to complete before letting h/w
3989                          * know there are new descriptors to fetch.  (Only
3990                          * applicable for weak-ordered memory model archs,
3991                          * such as IA-64). */
3992                         wmb();
3993                         /* Hardware increments by 16 bytes, but packet split
3994                          * descriptors are 32 bytes...so we increment tail
3995                          * twice as much.
3996                          */
3997                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3998                 }
3999
4000                 if(unlikely(++i == rx_ring->count)) i = 0;
4001                 buffer_info = &rx_ring->buffer_info[i];
4002                 ps_page = &rx_ring->ps_page[i];
4003                 ps_page_dma = &rx_ring->ps_page_dma[i];
4004         }
4005
4006 no_buffers:
4007         rx_ring->next_to_use = i;
4008 }
4009
4010 /**
4011  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4012  * @adapter:
4013  **/
4014
4015 static void
4016 e1000_smartspeed(struct e1000_adapter *adapter)
4017 {
4018         uint16_t phy_status;
4019         uint16_t phy_ctrl;
4020
4021         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4022            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4023                 return;
4024
4025         if(adapter->smartspeed == 0) {
4026                 /* If Master/Slave config fault is asserted twice,
4027                  * we assume back-to-back */
4028                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4029                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4030                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4031                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4032                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4033                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
4034                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4035                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4036                                             phy_ctrl);
4037                         adapter->smartspeed++;
4038                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
4039                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4040                                                &phy_ctrl)) {
4041                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4042                                              MII_CR_RESTART_AUTO_NEG);
4043                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4044                                                     phy_ctrl);
4045                         }
4046                 }
4047                 return;
4048         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4049                 /* If still no link, perhaps using 2/3 pair cable */
4050                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4051                 phy_ctrl |= CR_1000T_MS_ENABLE;
4052                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4053                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
4054                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4055                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4056                                      MII_CR_RESTART_AUTO_NEG);
4057                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4058                 }
4059         }
4060         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4061         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4062                 adapter->smartspeed = 0;
4063 }
4064
4065 /**
4066  * e1000_ioctl -
4067  * @netdev:
4068  * @ifreq:
4069  * @cmd:
4070  **/
4071
4072 static int
4073 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4074 {
4075         switch (cmd) {
4076         case SIOCGMIIPHY:
4077         case SIOCGMIIREG:
4078         case SIOCSMIIREG:
4079                 return e1000_mii_ioctl(netdev, ifr, cmd);
4080         default:
4081                 return -EOPNOTSUPP;
4082         }
4083 }
4084
4085 /**
4086  * e1000_mii_ioctl -
4087  * @netdev:
4088  * @ifreq:
4089  * @cmd:
4090  **/
4091
4092 static int
4093 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4094 {
4095         struct e1000_adapter *adapter = netdev_priv(netdev);
4096         struct mii_ioctl_data *data = if_mii(ifr);
4097         int retval;
4098         uint16_t mii_reg;
4099         uint16_t spddplx;
4100         unsigned long flags;
4101
4102         if(adapter->hw.media_type != e1000_media_type_copper)
4103                 return -EOPNOTSUPP;
4104
4105         switch (cmd) {
4106         case SIOCGMIIPHY:
4107                 data->phy_id = adapter->hw.phy_addr;
4108                 break;
4109         case SIOCGMIIREG:
4110                 if(!capable(CAP_NET_ADMIN))
4111                         return -EPERM;
4112                 spin_lock_irqsave(&adapter->stats_lock, flags);
4113                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4114                                    &data->val_out)) {
4115                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4116                         return -EIO;
4117                 }
4118                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4119                 break;
4120         case SIOCSMIIREG:
4121                 if(!capable(CAP_NET_ADMIN))
4122                         return -EPERM;
4123                 if(data->reg_num & ~(0x1F))
4124                         return -EFAULT;
4125                 mii_reg = data->val_in;
4126                 spin_lock_irqsave(&adapter->stats_lock, flags);
4127                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
4128                                         mii_reg)) {
4129                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4130                         return -EIO;
4131                 }
4132                 if(adapter->hw.phy_type == e1000_phy_m88) {
4133                         switch (data->reg_num) {
4134                         case PHY_CTRL:
4135                                 if(mii_reg & MII_CR_POWER_DOWN)
4136                                         break;
4137                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
4138                                         adapter->hw.autoneg = 1;
4139                                         adapter->hw.autoneg_advertised = 0x2F;
4140                                 } else {
4141                                         if (mii_reg & 0x40)
4142                                                 spddplx = SPEED_1000;
4143                                         else if (mii_reg & 0x2000)
4144                                                 spddplx = SPEED_100;
4145                                         else
4146                                                 spddplx = SPEED_10;
4147                                         spddplx += (mii_reg & 0x100)
4148                                                    ? FULL_DUPLEX :
4149                                                    HALF_DUPLEX;
4150                                         retval = e1000_set_spd_dplx(adapter,
4151                                                                     spddplx);
4152                                         if(retval) {
4153                                                 spin_unlock_irqrestore(
4154                                                         &adapter->stats_lock,
4155                                                         flags);
4156                                                 return retval;
4157                                         }
4158                                 }
4159                                 if(netif_running(adapter->netdev)) {
4160                                         e1000_down(adapter);
4161                                         e1000_up(adapter);
4162                                 } else
4163                                         e1000_reset(adapter);
4164                                 break;
4165                         case M88E1000_PHY_SPEC_CTRL:
4166                         case M88E1000_EXT_PHY_SPEC_CTRL:
4167                                 if(e1000_phy_reset(&adapter->hw)) {
4168                                         spin_unlock_irqrestore(
4169                                                 &adapter->stats_lock, flags);
4170                                         return -EIO;
4171                                 }
4172                                 break;
4173                         }
4174                 } else {
4175                         switch (data->reg_num) {
4176                         case PHY_CTRL:
4177                                 if(mii_reg & MII_CR_POWER_DOWN)
4178                                         break;
4179                                 if(netif_running(adapter->netdev)) {
4180                                         e1000_down(adapter);
4181                                         e1000_up(adapter);
4182                                 } else
4183                                         e1000_reset(adapter);
4184                                 break;
4185                         }
4186                 }
4187                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4188                 break;
4189         default:
4190                 return -EOPNOTSUPP;
4191         }
4192         return E1000_SUCCESS;
4193 }
4194
4195 void
4196 e1000_pci_set_mwi(struct e1000_hw *hw)
4197 {
4198         struct e1000_adapter *adapter = hw->back;
4199         int ret_val = pci_set_mwi(adapter->pdev);
4200
4201         if(ret_val)
4202                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4203 }
4204
4205 void
4206 e1000_pci_clear_mwi(struct e1000_hw *hw)
4207 {
4208         struct e1000_adapter *adapter = hw->back;
4209
4210         pci_clear_mwi(adapter->pdev);
4211 }
4212
4213 void
4214 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4215 {
4216         struct e1000_adapter *adapter = hw->back;
4217
4218         pci_read_config_word(adapter->pdev, reg, value);
4219 }
4220
4221 void
4222 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4223 {
4224         struct e1000_adapter *adapter = hw->back;
4225
4226         pci_write_config_word(adapter->pdev, reg, *value);
4227 }
4228
4229 uint32_t
4230 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4231 {
4232         return inl(port);
4233 }
4234
4235 void
4236 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4237 {
4238         outl(value, port);
4239 }
4240
4241 static void
4242 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4243 {
4244         struct e1000_adapter *adapter = netdev_priv(netdev);
4245         uint32_t ctrl, rctl;
4246
4247         e1000_irq_disable(adapter);
4248         adapter->vlgrp = grp;
4249
4250         if(grp) {
4251                 /* enable VLAN tag insert/strip */
4252                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4253                 ctrl |= E1000_CTRL_VME;
4254                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4255
4256                 /* enable VLAN receive filtering */
4257                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4258                 rctl |= E1000_RCTL_VFE;
4259                 rctl &= ~E1000_RCTL_CFIEN;
4260                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4261                 e1000_update_mng_vlan(adapter);
4262         } else {
4263                 /* disable VLAN tag insert/strip */
4264                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4265                 ctrl &= ~E1000_CTRL_VME;
4266                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4267
4268                 /* disable VLAN filtering */
4269                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4270                 rctl &= ~E1000_RCTL_VFE;
4271                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4272                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4273                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4274                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4275                 }
4276         }
4277
4278         e1000_irq_enable(adapter);
4279 }
4280
4281 static void
4282 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4283 {
4284         struct e1000_adapter *adapter = netdev_priv(netdev);
4285         uint32_t vfta, index;
4286         if((adapter->hw.mng_cookie.status &
4287                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4288                 (vid == adapter->mng_vlan_id))
4289                 return;
4290         /* add VID to filter table */
4291         index = (vid >> 5) & 0x7F;
4292         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4293         vfta |= (1 << (vid & 0x1F));
4294         e1000_write_vfta(&adapter->hw, index, vfta);
4295 }
4296
4297 static void
4298 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4299 {
4300         struct e1000_adapter *adapter = netdev_priv(netdev);
4301         uint32_t vfta, index;
4302
4303         e1000_irq_disable(adapter);
4304
4305         if(adapter->vlgrp)
4306                 adapter->vlgrp->vlan_devices[vid] = NULL;
4307
4308         e1000_irq_enable(adapter);
4309
4310         if((adapter->hw.mng_cookie.status &
4311                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4312             (vid == adapter->mng_vlan_id)) {
4313                 /* release control to f/w */
4314                 e1000_release_hw_control(adapter);
4315                 return;
4316         }
4317
4318         /* remove VID from filter table */
4319         index = (vid >> 5) & 0x7F;
4320         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4321         vfta &= ~(1 << (vid & 0x1F));
4322         e1000_write_vfta(&adapter->hw, index, vfta);
4323 }
4324
4325 static void
4326 e1000_restore_vlan(struct e1000_adapter *adapter)
4327 {
4328         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4329
4330         if(adapter->vlgrp) {
4331                 uint16_t vid;
4332                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4333                         if(!adapter->vlgrp->vlan_devices[vid])
4334                                 continue;
4335                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4336                 }
4337         }
4338 }
4339
4340 int
4341 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4342 {
4343         adapter->hw.autoneg = 0;
4344
4345         /* Fiber NICs only allow 1000 gbps Full duplex */
4346         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4347                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4348                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4349                 return -EINVAL;
4350         }
4351
4352         switch(spddplx) {
4353         case SPEED_10 + DUPLEX_HALF:
4354                 adapter->hw.forced_speed_duplex = e1000_10_half;
4355                 break;
4356         case SPEED_10 + DUPLEX_FULL:
4357                 adapter->hw.forced_speed_duplex = e1000_10_full;
4358                 break;
4359         case SPEED_100 + DUPLEX_HALF:
4360                 adapter->hw.forced_speed_duplex = e1000_100_half;
4361                 break;
4362         case SPEED_100 + DUPLEX_FULL:
4363                 adapter->hw.forced_speed_duplex = e1000_100_full;
4364                 break;
4365         case SPEED_1000 + DUPLEX_FULL:
4366                 adapter->hw.autoneg = 1;
4367                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4368                 break;
4369         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4370         default:
4371                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4372                 return -EINVAL;
4373         }
4374         return 0;
4375 }
4376
4377 #ifdef CONFIG_PM
4378 static int
4379 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4380 {
4381         struct net_device *netdev = pci_get_drvdata(pdev);
4382         struct e1000_adapter *adapter = netdev_priv(netdev);
4383         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4384         uint32_t wufc = adapter->wol;
4385         int retval = 0;
4386
4387         netif_device_detach(netdev);
4388
4389         if(netif_running(netdev))
4390                 e1000_down(adapter);
4391
4392         status = E1000_READ_REG(&adapter->hw, STATUS);
4393         if(status & E1000_STATUS_LU)
4394                 wufc &= ~E1000_WUFC_LNKC;
4395
4396         if(wufc) {
4397                 e1000_setup_rctl(adapter);
4398                 e1000_set_multi(netdev);
4399
4400                 /* turn on all-multi mode if wake on multicast is enabled */
4401                 if(adapter->wol & E1000_WUFC_MC) {
4402                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4403                         rctl |= E1000_RCTL_MPE;
4404                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4405                 }
4406
4407                 if(adapter->hw.mac_type >= e1000_82540) {
4408                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4409                         /* advertise wake from D3Cold */
4410                         #define E1000_CTRL_ADVD3WUC 0x00100000
4411                         /* phy power management enable */
4412                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4413                         ctrl |= E1000_CTRL_ADVD3WUC |
4414                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4415                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4416                 }
4417
4418                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4419                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4420                         /* keep the laser running in D3 */
4421                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4422                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4423                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4424                 }
4425
4426                 /* Allow time for pending master requests to run */
4427                 e1000_disable_pciex_master(&adapter->hw);
4428
4429                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4430                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4431                 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4432                 if (retval)
4433                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4434                 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4435                 if (retval)
4436                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4437         } else {
4438                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4439                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4440                 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4441                 if (retval)
4442                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4443                 retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
4444                 if (retval)
4445                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4446         }
4447
4448         pci_save_state(pdev);
4449
4450         if(adapter->hw.mac_type >= e1000_82540 &&
4451            adapter->hw.media_type == e1000_media_type_copper) {
4452                 manc = E1000_READ_REG(&adapter->hw, MANC);
4453                 if(manc & E1000_MANC_SMBUS_EN) {
4454                         manc |= E1000_MANC_ARP_EN;
4455                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4456                         retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4457                         if (retval)
4458                                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4459                         retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4460                         if (retval)
4461                                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4462                 }
4463         }
4464
4465         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4466          * would have already happened in close and is redundant. */
4467         e1000_release_hw_control(adapter);
4468
4469         pci_disable_device(pdev);
4470
4471         retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4472         if (retval)
4473                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4474
4475         return 0;
4476 }
4477
4478 static int
4479 e1000_resume(struct pci_dev *pdev)
4480 {
4481         struct net_device *netdev = pci_get_drvdata(pdev);
4482         struct e1000_adapter *adapter = netdev_priv(netdev);
4483         int retval;
4484         uint32_t manc, ret_val;
4485
4486         retval = pci_set_power_state(pdev, PCI_D0);
4487         if (retval)
4488                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4489         ret_val = pci_enable_device(pdev);
4490         pci_set_master(pdev);
4491
4492         retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4493         if (retval)
4494                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4495         retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4496         if (retval)
4497                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4498
4499         e1000_reset(adapter);
4500         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4501
4502         if(netif_running(netdev))
4503                 e1000_up(adapter);
4504
4505         netif_device_attach(netdev);
4506
4507         if(adapter->hw.mac_type >= e1000_82540 &&
4508            adapter->hw.media_type == e1000_media_type_copper) {
4509                 manc = E1000_READ_REG(&adapter->hw, MANC);
4510                 manc &= ~(E1000_MANC_ARP_EN);
4511                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4512         }
4513
4514         /* If the controller is 82573 and f/w is AMT, do not set
4515          * DRV_LOAD until the interface is up.  For all other cases,
4516          * let the f/w know that the h/w is now under the control
4517          * of the driver. */
4518         if (adapter->hw.mac_type != e1000_82573 ||
4519             !e1000_check_mng_mode(&adapter->hw))
4520                 e1000_get_hw_control(adapter);
4521
4522         return 0;
4523 }
4524 #endif
4525 #ifdef CONFIG_NET_POLL_CONTROLLER
4526 /*
4527  * Polling 'interrupt' - used by things like netconsole to send skbs
4528  * without having to re-enable interrupts. It's not called while
4529  * the interrupt routine is executing.
4530  */
4531 static void
4532 e1000_netpoll(struct net_device *netdev)
4533 {
4534         struct e1000_adapter *adapter = netdev_priv(netdev);
4535         disable_irq(adapter->pdev->irq);
4536         e1000_intr(adapter->pdev->irq, netdev, NULL);
4537         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4538 #ifndef CONFIG_E1000_NAPI
4539         adapter->clean_rx(adapter, adapter->rx_ring);
4540 #endif
4541         enable_irq(adapter->pdev->irq);
4542 }
4543 #endif
4544
4545 /* e1000_main.c */