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