drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  * 7.0.33      3-Feb-2006
  33  *   o Added another fix for the pass false carrier bit
  34  * 7.0.32      24-Jan-2006
  35  *   o Need to rebuild with noew version number for the pass false carrier
  36  *     fix in e1000_hw.c
  37  * 7.0.30      18-Jan-2006
  38  *   o fixup for tso workaround to disable it for pci-x
  39  *   o fix mem leak on 82542
  40  *   o fixes for 10 Mb/s connections and incorrect stats
  41  * 7.0.28      01/06/2006
  42  *   o hardware workaround to only set "speed mode" bit for 1G link.
  43  * 7.0.26      12/23/2005
  44  *   o wake on lan support modified for device ID 10B5
  45  *   o fix dhcp + vlan issue not making it to the iAMT firmware
  46  * 7.0.24      12/9/2005
  47  *   o New hardware support for the Gigabit NIC embedded in the south bridge
  48  *   o Fixes to the recycling logic (skb->tail) from IBM LTC
  49  * 6.3.9        12/16/2005
  50  *   o incorporate fix for recycled skbs from IBM LTC
  51  * 6.3.7        11/18/2005
  52  *   o Honor eeprom setting for enabling/disabling Wake On Lan
  53  * 6.3.5        11/17/2005
  54  *   o Fix memory leak in rx ring handling for PCI Express adapters
  55  * 6.3.4        11/8/05
  56  *   o Patch from Jesper Juhl to remove redundant NULL checks for kfree
  57  * 6.3.2        9/20/05
  58  *   o Render logic that sets/resets DRV_LOAD as inline functions to
  59  *     avoid code replication. If f/w is AMT then set DRV_LOAD only when
  60  *     network interface is open.
  61  *   o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
  62  *   o Adjust PBA partioning for Jumbo frames using MTU size and not
  63  *     rx_buffer_len
  64  * 6.3.1        9/19/05
  65  *   o Use adapter->tx_timeout_factor in Tx Hung Detect logic
  66  *      (e1000_clean_tx_irq)
  67  *   o Support for 8086:10B5 device (Quad Port)
  68  */
  69
  70 char e1000_driver_name[] = "e1000";
  71 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  72 #ifndef CONFIG_E1000_NAPI
  73 #define DRIVERNAPI
  74 #else
  75 #define DRIVERNAPI "-NAPI"
  76 #endif
  77 #define DRV_VERSION "7.0.33-k2"DRIVERNAPI
  78 char e1000_driver_version[] = DRV_VERSION;
  79 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
  80
  81 /* e1000_pci_tbl - PCI Device ID Table
  82  *
  83  * Last entry must be all 0s
  84  *
  85  * Macro expands to...
  86  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  87  */
  88 static struct pci_device_id e1000_pci_tbl[] = {
  89         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  91         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  94         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  95         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  96         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  97         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  99         INTEL_E1000_ETHERNET_DEVICE(0x1011),
 100         INTEL_E1000_ETHERNET_DEVICE(0x1012),
 101         INTEL_E1000_ETHERNET_DEVICE(0x1013),
 102         INTEL_E1000_ETHERNET_DEVICE(0x1014),
 103         INTEL_E1000_ETHERNET_DEVICE(0x1015),
 104         INTEL_E1000_ETHERNET_DEVICE(0x1016),
 105         INTEL_E1000_ETHERNET_DEVICE(0x1017),
 106         INTEL_E1000_ETHERNET_DEVICE(0x1018),
 107         INTEL_E1000_ETHERNET_DEVICE(0x1019),
 108         INTEL_E1000_ETHERNET_DEVICE(0x101A),
 109         INTEL_E1000_ETHERNET_DEVICE(0x101D),
 110         INTEL_E1000_ETHERNET_DEVICE(0x101E),
 111         INTEL_E1000_ETHERNET_DEVICE(0x1026),
 112         INTEL_E1000_ETHERNET_DEVICE(0x1027),
 113         INTEL_E1000_ETHERNET_DEVICE(0x1028),
 114         INTEL_E1000_ETHERNET_DEVICE(0x105E),
 115         INTEL_E1000_ETHERNET_DEVICE(0x105F),
 116         INTEL_E1000_ETHERNET_DEVICE(0x1060),
 117         INTEL_E1000_ETHERNET_DEVICE(0x1075),
 118         INTEL_E1000_ETHERNET_DEVICE(0x1076),
 119         INTEL_E1000_ETHERNET_DEVICE(0x1077),
 120         INTEL_E1000_ETHERNET_DEVICE(0x1078),
 121         INTEL_E1000_ETHERNET_DEVICE(0x1079),
 122         INTEL_E1000_ETHERNET_DEVICE(0x107A),
 123         INTEL_E1000_ETHERNET_DEVICE(0x107B),
 124         INTEL_E1000_ETHERNET_DEVICE(0x107C),
 125         INTEL_E1000_ETHERNET_DEVICE(0x107D),
 126         INTEL_E1000_ETHERNET_DEVICE(0x107E),
 127         INTEL_E1000_ETHERNET_DEVICE(0x107F),
 128         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 129         INTEL_E1000_ETHERNET_DEVICE(0x108B),
 130         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 131         INTEL_E1000_ETHERNET_DEVICE(0x1096),
 132         INTEL_E1000_ETHERNET_DEVICE(0x1098),
 133         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 134         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 135         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 136         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 137         /* required last entry */
 138         {0,}
 139 };
 140
 141 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 142
 143 int e1000_up(struct e1000_adapter *adapter);
 144 void e1000_down(struct e1000_adapter *adapter);
 145 void e1000_reset(struct e1000_adapter *adapter);
 146 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 147 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 148 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 149 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 150 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 151 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 152                                     struct e1000_tx_ring *txdr);
 153 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 154                                     struct e1000_rx_ring *rxdr);
 155 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 156                                     struct e1000_tx_ring *tx_ring);
 157 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 158                                     struct e1000_rx_ring *rx_ring);
 159 void e1000_update_stats(struct e1000_adapter *adapter);
 160
 161 /* Local Function Prototypes */
 162
 163 static int e1000_init_module(void);
 164 static void e1000_exit_module(void);
 165 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 166 static void __devexit e1000_remove(struct pci_dev *pdev);
 167 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 168 static int e1000_sw_init(struct e1000_adapter *adapter);
 169 static int e1000_open(struct net_device *netdev);
 170 static int e1000_close(struct net_device *netdev);
 171 static void e1000_configure_tx(struct e1000_adapter *adapter);
 172 static void e1000_configure_rx(struct e1000_adapter *adapter);
 173 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 174 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 175 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 176 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 177                                 struct e1000_tx_ring *tx_ring);
 178 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 179                                 struct e1000_rx_ring *rx_ring);
 180 static void e1000_set_multi(struct net_device *netdev);
 181 static void e1000_update_phy_info(unsigned long data);
 182 static void e1000_watchdog(unsigned long data);
 183 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 184 static void e1000_82547_tx_fifo_stall(unsigned long data);
 185 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 186 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 187 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 188 static int e1000_set_mac(struct net_device *netdev, void *p);
 189 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 190 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 191                                     struct e1000_tx_ring *tx_ring);
 192 #ifdef CONFIG_E1000_NAPI
 193 static int e1000_clean(struct net_device *poll_dev, int *budget);
 194 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 195                                     struct e1000_rx_ring *rx_ring,
 196                                     int *work_done, int work_to_do);
 197 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 198                                        struct e1000_rx_ring *rx_ring,
 199                                        int *work_done, int work_to_do);
 200 #else
 201 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 202                                     struct e1000_rx_ring *rx_ring);
 203 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 204                                        struct e1000_rx_ring *rx_ring);
 205 #endif
 206 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 207                                    struct e1000_rx_ring *rx_ring,
 208                                    int cleaned_count);
 209 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 210                                       struct e1000_rx_ring *rx_ring,
 211                                       int cleaned_count);
 212 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 213 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 214                            int cmd);
 215 void e1000_set_ethtool_ops(struct net_device *netdev);
 216 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 217 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 218 static void e1000_tx_timeout(struct net_device *dev);
 219 static void e1000_reset_task(struct net_device *dev);
 220 static void e1000_smartspeed(struct e1000_adapter *adapter);
 221 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 222                                               struct sk_buff *skb);
 223
 224 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 225 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 226 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 227 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 228
 229 #ifdef CONFIG_PM
 230 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 231 static int e1000_resume(struct pci_dev *pdev);
 232 #endif
 233
 234 #ifdef CONFIG_NET_POLL_CONTROLLER
 235 /* for netdump / net console */
 236 static void e1000_netpoll (struct net_device *netdev);
 237 #endif
 238
 239
 240 /* Exported from other modules */
 241
 242 extern void e1000_check_options(struct e1000_adapter *adapter);
 243
 244 static struct pci_driver e1000_driver = {
 245         .name     = e1000_driver_name,
 246         .id_table = e1000_pci_tbl,
 247         .probe    = e1000_probe,
 248         .remove   = __devexit_p(e1000_remove),
 249         /* Power Managment Hooks */
 250 #ifdef CONFIG_PM
 251         .suspend  = e1000_suspend,
 252         .resume   = e1000_resume
 253 #endif
 254 };
 255
 256 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 257 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 258 MODULE_LICENSE("GPL");
 259 MODULE_VERSION(DRV_VERSION);
 260
 261 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 262 module_param(debug, int, 0);
 263 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 264
 265 /**
 266  * e1000_init_module - Driver Registration Routine
 267  *
 268  * e1000_init_module is the first routine called when the driver is
 269  * loaded. All it does is register with the PCI subsystem.
 270  **/
 271
 272 static int __init
 273 e1000_init_module(void)
 274 {
 275         int ret;
 276         printk(KERN_INFO "%s - version %s\n",
 277                e1000_driver_string, e1000_driver_version);
 278
 279         printk(KERN_INFO "%s\n", e1000_copyright);
 280
 281         ret = pci_module_init(&e1000_driver);
 282
 283         return ret;
 284 }
 285
 286 module_init(e1000_init_module);
 287
 288 /**
 289  * e1000_exit_module - Driver Exit Cleanup Routine
 290  *
 291  * e1000_exit_module is called just before the driver is removed
 292  * from memory.
 293  **/
 294
 295 static void __exit
 296 e1000_exit_module(void)
 297 {
 298         pci_unregister_driver(&e1000_driver);
 299 }
 300
 301 module_exit(e1000_exit_module);
 302
 303 /**
 304  * e1000_irq_disable - Mask off interrupt generation on the NIC
 305  * @adapter: board private structure
 306  **/
 307
 308 static inline void
 309 e1000_irq_disable(struct e1000_adapter *adapter)
 310 {
 311         atomic_inc(&adapter->irq_sem);
 312         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 313         E1000_WRITE_FLUSH(&adapter->hw);
 314         synchronize_irq(adapter->pdev->irq);
 315 }
 316
 317 /**
 318  * e1000_irq_enable - Enable default interrupt generation settings
 319  * @adapter: board private structure
 320  **/
 321
 322 static inline void
 323 e1000_irq_enable(struct e1000_adapter *adapter)
 324 {
 325         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 326                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 327                 E1000_WRITE_FLUSH(&adapter->hw);
 328         }
 329 }
 330
 331 static void
 332 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 333 {
 334         struct net_device *netdev = adapter->netdev;
 335         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 336         uint16_t old_vid = adapter->mng_vlan_id;
 337         if (adapter->vlgrp) {
 338                 if (!adapter->vlgrp->vlan_devices[vid]) {
 339                         if (adapter->hw.mng_cookie.status &
 340                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 341                                 e1000_vlan_rx_add_vid(netdev, vid);
 342                                 adapter->mng_vlan_id = vid;
 343                         } else
 344                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 345
 346                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 347                                         (vid != old_vid) &&
 348                                         !adapter->vlgrp->vlan_devices[old_vid])
 349                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 350                 } else
 351                         adapter->mng_vlan_id = vid;
 352         }
 353 }
 354
 355 /**
 356  * e1000_release_hw_control - release control of the h/w to f/w
 357  * @adapter: address of board private structure
 358  *
 359  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 360  * For ASF and Pass Through versions of f/w this means that the
 361  * driver is no longer loaded. For AMT version (only with 82573) i
 362  * of the f/w this means that the netowrk i/f is closed.
 363  *
 364  **/
 365
 366 static inline void
 367 e1000_release_hw_control(struct e1000_adapter *adapter)
 368 {
 369         uint32_t ctrl_ext;
 370         uint32_t swsm;
 371
 372         /* Let firmware taken over control of h/w */
 373         switch (adapter->hw.mac_type) {
 374         case e1000_82571:
 375         case e1000_82572:
 376                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 377                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 378                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 379                 break;
 380         case e1000_82573:
 381                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 382                 E1000_WRITE_REG(&adapter->hw, SWSM,
 383                                 swsm & ~E1000_SWSM_DRV_LOAD);
 384         default:
 385                 break;
 386         }
 387 }
 388
 389 /**
 390  * e1000_get_hw_control - get control of the h/w from f/w
 391  * @adapter: address of board private structure
 392  *
 393  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 394  * For ASF and Pass Through versions of f/w this means that
 395  * the driver is loaded. For AMT version (only with 82573)
 396  * of the f/w this means that the netowrk i/f is open.
 397  *
 398  **/
 399
 400 static inline void
 401 e1000_get_hw_control(struct e1000_adapter *adapter)
 402 {
 403         uint32_t ctrl_ext;
 404         uint32_t swsm;
 405         /* Let firmware know the driver has taken over */
 406         switch (adapter->hw.mac_type) {
 407         case e1000_82571:
 408         case e1000_82572:
 409                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 410                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 411                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 412                 break;
 413         case e1000_82573:
 414                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 415                 E1000_WRITE_REG(&adapter->hw, SWSM,
 416                                 swsm | E1000_SWSM_DRV_LOAD);
 417                 break;
 418         default:
 419                 break;
 420         }
 421 }
 422
 423 int
 424 e1000_up(struct e1000_adapter *adapter)
 425 {
 426         struct net_device *netdev = adapter->netdev;
 427         int i, err;
 428
 429         /* hardware has been reset, we need to reload some things */
 430
 431         /* Reset the PHY if it was previously powered down */
 432         if (adapter->hw.media_type == e1000_media_type_copper) {
 433                 uint16_t mii_reg;
 434                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 435                 if (mii_reg & MII_CR_POWER_DOWN)
 436                         e1000_phy_reset(&adapter->hw);
 437         }
 438
 439         e1000_set_multi(netdev);
 440
 441         e1000_restore_vlan(adapter);
 442
 443         e1000_configure_tx(adapter);
 444         e1000_setup_rctl(adapter);
 445         e1000_configure_rx(adapter);
 446         /* call E1000_DESC_UNUSED which always leaves
 447          * at least 1 descriptor unused to make sure
 448          * next_to_use != next_to_clean */
 449         for (i = 0; i < adapter->num_rx_queues; i++) {
 450                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 451                 adapter->alloc_rx_buf(adapter, ring,
 452                                       E1000_DESC_UNUSED(ring));
 453         }
 454
 455 #ifdef CONFIG_PCI_MSI
 456         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 457                 adapter->have_msi = TRUE;
 458                 if ((err = pci_enable_msi(adapter->pdev))) {
 459                         DPRINTK(PROBE, ERR,
 460                          "Unable to allocate MSI interrupt Error: %d\n", err);
 461                         adapter->have_msi = FALSE;
 462                 }
 463         }
 464 #endif
 465         if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
 466                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 467                               netdev->name, netdev))) {
 468                 DPRINTK(PROBE, ERR,
 469                     "Unable to allocate interrupt Error: %d\n", err);
 470                 return err;
 471         }
 472
 473         adapter->tx_queue_len = netdev->tx_queue_len;
 474
 475         mod_timer(&adapter->watchdog_timer, jiffies);
 476
 477 #ifdef CONFIG_E1000_NAPI
 478         netif_poll_enable(netdev);
 479 #endif
 480         e1000_irq_enable(adapter);
 481
 482         return 0;
 483 }
 484
 485 void
 486 e1000_down(struct e1000_adapter *adapter)
 487 {
 488         struct net_device *netdev = adapter->netdev;
 489         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 490                                      e1000_check_mng_mode(&adapter->hw);
 491
 492         e1000_irq_disable(adapter);
 493
 494         free_irq(adapter->pdev->irq, netdev);
 495 #ifdef CONFIG_PCI_MSI
 496         if (adapter->hw.mac_type > e1000_82547_rev_2 &&
 497            adapter->have_msi == TRUE)
 498                 pci_disable_msi(adapter->pdev);
 499 #endif
 500         del_timer_sync(&adapter->tx_fifo_stall_timer);
 501         del_timer_sync(&adapter->watchdog_timer);
 502         del_timer_sync(&adapter->phy_info_timer);
 503
 504 #ifdef CONFIG_E1000_NAPI
 505         netif_poll_disable(netdev);
 506 #endif
 507         netdev->tx_queue_len = adapter->tx_queue_len;
 508         adapter->link_speed = 0;
 509         adapter->link_duplex = 0;
 510         netif_carrier_off(netdev);
 511         netif_stop_queue(netdev);
 512
 513         e1000_reset(adapter);
 514         e1000_clean_all_tx_rings(adapter);
 515         e1000_clean_all_rx_rings(adapter);
 516
 517         /* Power down the PHY so no link is implied when interface is down *
 518          * The PHY cannot be powered down if any of the following is TRUE *
 519          * (a) WoL is enabled
 520          * (b) AMT is active
 521          * (c) SoL/IDER session is active */
 522         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 523            adapter->hw.media_type == e1000_media_type_copper &&
 524            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 525            !mng_mode_enabled &&
 526            !e1000_check_phy_reset_block(&adapter->hw)) {
 527                 uint16_t mii_reg;
 528                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 529                 mii_reg |= MII_CR_POWER_DOWN;
 530                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 531                 mdelay(1);
 532         }
 533 }
 534
 535 void
 536 e1000_reset(struct e1000_adapter *adapter)
 537 {
 538         uint32_t pba, manc;
 539         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 540
 541         /* Repartition Pba for greater than 9k mtu
 542          * To take effect CTRL.RST is required.
 543          */
 544
 545         switch (adapter->hw.mac_type) {
 546         case e1000_82547:
 547         case e1000_82547_rev_2:
 548                 pba = E1000_PBA_30K;
 549                 break;
 550         case e1000_82571:
 551         case e1000_82572:
 552         case e1000_80003es2lan:
 553                 pba = E1000_PBA_38K;
 554                 break;
 555         case e1000_82573:
 556                 pba = E1000_PBA_12K;
 557                 break;
 558         default:
 559                 pba = E1000_PBA_48K;
 560                 break;
 561         }
 562
 563         if ((adapter->hw.mac_type != e1000_82573) &&
 564            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 565                 pba -= 8; /* allocate more FIFO for Tx */
 566
 567
 568         if (adapter->hw.mac_type == e1000_82547) {
 569                 adapter->tx_fifo_head = 0;
 570                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 571                 adapter->tx_fifo_size =
 572                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 573                 atomic_set(&adapter->tx_fifo_stall, 0);
 574         }
 575
 576         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 577
 578         /* flow control settings */
 579         /* Set the FC high water mark to 90% of the FIFO size.
 580          * Required to clear last 3 LSB */
 581         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 582
 583         adapter->hw.fc_high_water = fc_high_water_mark;
 584         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 585         if (adapter->hw.mac_type == e1000_80003es2lan)
 586                 adapter->hw.fc_pause_time = 0xFFFF;
 587         else
 588                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 589         adapter->hw.fc_send_xon = 1;
 590         adapter->hw.fc = adapter->hw.original_fc;
 591
 592         /* Allow time for pending master requests to run */
 593         e1000_reset_hw(&adapter->hw);
 594         if (adapter->hw.mac_type >= e1000_82544)
 595                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 596         if (e1000_init_hw(&adapter->hw))
 597                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 598         e1000_update_mng_vlan(adapter);
 599         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 600         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 601
 602         e1000_reset_adaptive(&adapter->hw);
 603         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 604         if (adapter->en_mng_pt) {
 605                 manc = E1000_READ_REG(&adapter->hw, MANC);
 606                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 607                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 608         }
 609 }
 610
 611 /**
 612  * e1000_probe - Device Initialization Routine
 613  * @pdev: PCI device information struct
 614  * @ent: entry in e1000_pci_tbl
 615  *
 616  * Returns 0 on success, negative on failure
 617  *
 618  * e1000_probe initializes an adapter identified by a pci_dev structure.
 619  * The OS initialization, configuring of the adapter private structure,
 620  * and a hardware reset occur.
 621  **/
 622
 623 static int __devinit
 624 e1000_probe(struct pci_dev *pdev,
 625             const struct pci_device_id *ent)
 626 {
 627         struct net_device *netdev;
 628         struct e1000_adapter *adapter;
 629         unsigned long mmio_start, mmio_len;
 630
 631         static int cards_found = 0;
 632         static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
 633         int i, err, pci_using_dac;
 634         uint16_t eeprom_data;
 635         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 636         if ((err = pci_enable_device(pdev)))
 637                 return err;
 638
 639         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 640                 pci_using_dac = 1;
 641         } else {
 642                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 643                         E1000_ERR("No usable DMA configuration, aborting\n");
 644                         return err;
 645                 }
 646                 pci_using_dac = 0;
 647         }
 648
 649         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 650                 return err;
 651
 652         pci_set_master(pdev);
 653
 654         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 655         if (!netdev) {
 656                 err = -ENOMEM;
 657                 goto err_alloc_etherdev;
 658         }
 659
 660         SET_MODULE_OWNER(netdev);
 661         SET_NETDEV_DEV(netdev, &pdev->dev);
 662
 663         pci_set_drvdata(pdev, netdev);
 664         adapter = netdev_priv(netdev);
 665         adapter->netdev = netdev;
 666         adapter->pdev = pdev;
 667         adapter->hw.back = adapter;
 668         adapter->msg_enable = (1 << debug) - 1;
 669
 670         mmio_start = pci_resource_start(pdev, BAR_0);
 671         mmio_len = pci_resource_len(pdev, BAR_0);
 672
 673         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 674         if (!adapter->hw.hw_addr) {
 675                 err = -EIO;
 676                 goto err_ioremap;
 677         }
 678
 679         for (i = BAR_1; i <= BAR_5; i++) {
 680                 if (pci_resource_len(pdev, i) == 0)
 681                         continue;
 682                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 683                         adapter->hw.io_base = pci_resource_start(pdev, i);
 684                         break;
 685                 }
 686         }
 687
 688         netdev->open = &e1000_open;
 689         netdev->stop = &e1000_close;
 690         netdev->hard_start_xmit = &e1000_xmit_frame;
 691         netdev->get_stats = &e1000_get_stats;
 692         netdev->set_multicast_list = &e1000_set_multi;
 693         netdev->set_mac_address = &e1000_set_mac;
 694         netdev->change_mtu = &e1000_change_mtu;
 695         netdev->do_ioctl = &e1000_ioctl;
 696         e1000_set_ethtool_ops(netdev);
 697         netdev->tx_timeout = &e1000_tx_timeout;
 698         netdev->watchdog_timeo = 5 * HZ;
 699 #ifdef CONFIG_E1000_NAPI
 700         netdev->poll = &e1000_clean;
 701         netdev->weight = 64;
 702 #endif
 703         netdev->vlan_rx_register = e1000_vlan_rx_register;
 704         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 705         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 706 #ifdef CONFIG_NET_POLL_CONTROLLER
 707         netdev->poll_controller = e1000_netpoll;
 708 #endif
 709         strcpy(netdev->name, pci_name(pdev));
 710
 711         netdev->mem_start = mmio_start;
 712         netdev->mem_end = mmio_start + mmio_len;
 713         netdev->base_addr = adapter->hw.io_base;
 714
 715         adapter->bd_number = cards_found;
 716
 717         /* setup the private structure */
 718
 719         if ((err = e1000_sw_init(adapter)))
 720                 goto err_sw_init;
 721
 722         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 723                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 724
 725         /* if ksp3, indicate if it's port a being setup */
 726         if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
 727                         e1000_ksp3_port_a == 0)
 728                 adapter->ksp3_port_a = 1;
 729         e1000_ksp3_port_a++;
 730         /* Reset for multiple KP3 adapters */
 731         if (e1000_ksp3_port_a == 4)
 732                 e1000_ksp3_port_a = 0;
 733
 734         if (adapter->hw.mac_type >= e1000_82543) {
 735                 netdev->features = NETIF_F_SG |
 736                                    NETIF_F_HW_CSUM |
 737                                    NETIF_F_HW_VLAN_TX |
 738                                    NETIF_F_HW_VLAN_RX |
 739                                    NETIF_F_HW_VLAN_FILTER;
 740         }
 741
 742 #ifdef NETIF_F_TSO
 743         if ((adapter->hw.mac_type >= e1000_82544) &&
 744            (adapter->hw.mac_type != e1000_82547))
 745                 netdev->features |= NETIF_F_TSO;
 746
 747 #ifdef NETIF_F_TSO_IPV6
 748         if (adapter->hw.mac_type > e1000_82547_rev_2)
 749                 netdev->features |= NETIF_F_TSO_IPV6;
 750 #endif
 751 #endif
 752         if (pci_using_dac)
 753                 netdev->features |= NETIF_F_HIGHDMA;
 754
 755         /* hard_start_xmit is safe against parallel locking */
 756         netdev->features |= NETIF_F_LLTX;
 757
 758         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 759
 760         /* before reading the EEPROM, reset the controller to
 761          * put the device in a known good starting state */
 762
 763         e1000_reset_hw(&adapter->hw);
 764
 765         /* make sure the EEPROM is good */
 766
 767         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 768                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 769                 err = -EIO;
 770                 goto err_eeprom;
 771         }
 772
 773         /* copy the MAC address out of the EEPROM */
 774
 775         if (e1000_read_mac_addr(&adapter->hw))
 776                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 777         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 778         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 779
 780         if (!is_valid_ether_addr(netdev->perm_addr)) {
 781                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 782                 err = -EIO;
 783                 goto err_eeprom;
 784         }
 785
 786         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 787
 788         e1000_get_bus_info(&adapter->hw);
 789
 790         init_timer(&adapter->tx_fifo_stall_timer);
 791         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 792         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 793
 794         init_timer(&adapter->watchdog_timer);
 795         adapter->watchdog_timer.function = &e1000_watchdog;
 796         adapter->watchdog_timer.data = (unsigned long) adapter;
 797
 798         INIT_WORK(&adapter->watchdog_task,
 799                 (void (*)(void *))e1000_watchdog_task, adapter);
 800
 801         init_timer(&adapter->phy_info_timer);
 802         adapter->phy_info_timer.function = &e1000_update_phy_info;
 803         adapter->phy_info_timer.data = (unsigned long) adapter;
 804
 805         INIT_WORK(&adapter->reset_task,
 806                 (void (*)(void *))e1000_reset_task, netdev);
 807
 808         /* we're going to reset, so assume we have no link for now */
 809
 810         netif_carrier_off(netdev);
 811         netif_stop_queue(netdev);
 812
 813         e1000_check_options(adapter);
 814
 815         /* Initial Wake on LAN setting
 816          * If APM wake is enabled in the EEPROM,
 817          * enable the ACPI Magic Packet filter
 818          */
 819
 820         switch (adapter->hw.mac_type) {
 821         case e1000_82542_rev2_0:
 822         case e1000_82542_rev2_1:
 823         case e1000_82543:
 824                 break;
 825         case e1000_82544:
 826                 e1000_read_eeprom(&adapter->hw,
 827                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 828                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 829                 break;
 830         case e1000_82546:
 831         case e1000_82546_rev_3:
 832         case e1000_82571:
 833         case e1000_80003es2lan:
 834                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 835                         e1000_read_eeprom(&adapter->hw,
 836                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 837                         break;
 838                 }
 839                 /* Fall Through */
 840         default:
 841                 e1000_read_eeprom(&adapter->hw,
 842                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 843                 break;
 844         }
 845         if (eeprom_data & eeprom_apme_mask)
 846                 adapter->wol |= E1000_WUFC_MAG;
 847
 848         /* print bus type/speed/width info */
 849         {
 850         struct e1000_hw *hw = &adapter->hw;
 851         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 852                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 853                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 854                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 855                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 856                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 857                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 858                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 859                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 860                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 861                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 862                  "32-bit"));
 863         }
 864
 865         for (i = 0; i < 6; i++)
 866                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 867
 868         /* reset the hardware with the new settings */
 869         e1000_reset(adapter);
 870
 871         /* If the controller is 82573 and f/w is AMT, do not set
 872          * DRV_LOAD until the interface is up.  For all other cases,
 873          * let the f/w know that the h/w is now under the control
 874          * of the driver. */
 875         if (adapter->hw.mac_type != e1000_82573 ||
 876             !e1000_check_mng_mode(&adapter->hw))
 877                 e1000_get_hw_control(adapter);
 878
 879         strcpy(netdev->name, "eth%d");
 880         if ((err = register_netdev(netdev)))
 881                 goto err_register;
 882
 883         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 884
 885         cards_found++;
 886         return 0;
 887
 888 err_register:
 889 err_sw_init:
 890 err_eeprom:
 891         iounmap(adapter->hw.hw_addr);
 892 err_ioremap:
 893         free_netdev(netdev);
 894 err_alloc_etherdev:
 895         pci_release_regions(pdev);
 896         return err;
 897 }
 898
 899 /**
 900  * e1000_remove - Device Removal Routine
 901  * @pdev: PCI device information struct
 902  *
 903  * e1000_remove is called by the PCI subsystem to alert the driver
 904  * that it should release a PCI device.  The could be caused by a
 905  * Hot-Plug event, or because the driver is going to be removed from
 906  * memory.
 907  **/
 908
 909 static void __devexit
 910 e1000_remove(struct pci_dev *pdev)
 911 {
 912         struct net_device *netdev = pci_get_drvdata(pdev);
 913         struct e1000_adapter *adapter = netdev_priv(netdev);
 914         uint32_t manc;
 915 #ifdef CONFIG_E1000_NAPI
 916         int i;
 917 #endif
 918
 919         flush_scheduled_work();
 920
 921         if (adapter->hw.mac_type >= e1000_82540 &&
 922            adapter->hw.media_type == e1000_media_type_copper) {
 923                 manc = E1000_READ_REG(&adapter->hw, MANC);
 924                 if (manc & E1000_MANC_SMBUS_EN) {
 925                         manc |= E1000_MANC_ARP_EN;
 926                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 927                 }
 928         }
 929
 930         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 931          * would have already happened in close and is redundant. */
 932         e1000_release_hw_control(adapter);
 933
 934         unregister_netdev(netdev);
 935 #ifdef CONFIG_E1000_NAPI
 936         for (i = 0; i < adapter->num_rx_queues; i++)
 937                 __dev_put(&adapter->polling_netdev[i]);
 938 #endif
 939
 940         if (!e1000_check_phy_reset_block(&adapter->hw))
 941                 e1000_phy_hw_reset(&adapter->hw);
 942
 943         kfree(adapter->tx_ring);
 944         kfree(adapter->rx_ring);
 945 #ifdef CONFIG_E1000_NAPI
 946         kfree(adapter->polling_netdev);
 947 #endif
 948
 949         iounmap(adapter->hw.hw_addr);
 950         pci_release_regions(pdev);
 951
 952         free_netdev(netdev);
 953
 954         pci_disable_device(pdev);
 955 }
 956
 957 /**
 958  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 959  * @adapter: board private structure to initialize
 960  *
 961  * e1000_sw_init initializes the Adapter private data structure.
 962  * Fields are initialized based on PCI device information and
 963  * OS network device settings (MTU size).
 964  **/
 965
 966 static int __devinit
 967 e1000_sw_init(struct e1000_adapter *adapter)
 968 {
 969         struct e1000_hw *hw = &adapter->hw;
 970         struct net_device *netdev = adapter->netdev;
 971         struct pci_dev *pdev = adapter->pdev;
 972 #ifdef CONFIG_E1000_NAPI
 973         int i;
 974 #endif
 975
 976         /* PCI config space info */
 977
 978         hw->vendor_id = pdev->vendor;
 979         hw->device_id = pdev->device;
 980         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 981         hw->subsystem_id = pdev->subsystem_device;
 982
 983         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 984
 985         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 986
 987         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 988         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 989         hw->max_frame_size = netdev->mtu +
 990                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 991         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 992
 993         /* identify the MAC */
 994
 995         if (e1000_set_mac_type(hw)) {
 996                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 997                 return -EIO;
 998         }
 999
1000         /* initialize eeprom parameters */
1001
1002         if (e1000_init_eeprom_params(hw)) {
1003                 E1000_ERR("EEPROM initialization failed\n");
1004                 return -EIO;
1005         }
1006
1007         switch (hw->mac_type) {
1008         default:
1009                 break;
1010         case e1000_82541:
1011         case e1000_82547:
1012         case e1000_82541_rev_2:
1013         case e1000_82547_rev_2:
1014                 hw->phy_init_script = 1;
1015                 break;
1016         }
1017
1018         e1000_set_media_type(hw);
1019
1020         hw->wait_autoneg_complete = FALSE;
1021         hw->tbi_compatibility_en = TRUE;
1022         hw->adaptive_ifs = TRUE;
1023
1024         /* Copper options */
1025
1026         if (hw->media_type == e1000_media_type_copper) {
1027                 hw->mdix = AUTO_ALL_MODES;
1028                 hw->disable_polarity_correction = FALSE;
1029                 hw->master_slave = E1000_MASTER_SLAVE;
1030         }
1031
1032         adapter->num_tx_queues = 1;
1033         adapter->num_rx_queues = 1;
1034
1035         if (e1000_alloc_queues(adapter)) {
1036                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1037                 return -ENOMEM;
1038         }
1039
1040 #ifdef CONFIG_E1000_NAPI
1041         for (i = 0; i < adapter->num_rx_queues; i++) {
1042                 adapter->polling_netdev[i].priv = adapter;
1043                 adapter->polling_netdev[i].poll = &e1000_clean;
1044                 adapter->polling_netdev[i].weight = 64;
1045                 dev_hold(&adapter->polling_netdev[i]);
1046                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1047         }
1048         spin_lock_init(&adapter->tx_queue_lock);
1049 #endif
1050
1051         atomic_set(&adapter->irq_sem, 1);
1052         spin_lock_init(&adapter->stats_lock);
1053
1054         return 0;
1055 }
1056
1057 /**
1058  * e1000_alloc_queues - Allocate memory for all rings
1059  * @adapter: board private structure to initialize
1060  *
1061  * We allocate one ring per queue at run-time since we don't know the
1062  * number of queues at compile-time.  The polling_netdev array is
1063  * intended for Multiqueue, but should work fine with a single queue.
1064  **/
1065
1066 static int __devinit
1067 e1000_alloc_queues(struct e1000_adapter *adapter)
1068 {
1069         int size;
1070
1071         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1072         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1073         if (!adapter->tx_ring)
1074                 return -ENOMEM;
1075         memset(adapter->tx_ring, 0, size);
1076
1077         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1078         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1079         if (!adapter->rx_ring) {
1080                 kfree(adapter->tx_ring);
1081                 return -ENOMEM;
1082         }
1083         memset(adapter->rx_ring, 0, size);
1084
1085 #ifdef CONFIG_E1000_NAPI
1086         size = sizeof(struct net_device) * adapter->num_rx_queues;
1087         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1088         if (!adapter->polling_netdev) {
1089                 kfree(adapter->tx_ring);
1090                 kfree(adapter->rx_ring);
1091                 return -ENOMEM;
1092         }
1093         memset(adapter->polling_netdev, 0, size);
1094 #endif
1095
1096         return E1000_SUCCESS;
1097 }
1098
1099 /**
1100  * e1000_open - Called when a network interface is made active
1101  * @netdev: network interface device structure
1102  *
1103  * Returns 0 on success, negative value on failure
1104  *
1105  * The open entry point is called when a network interface is made
1106  * active by the system (IFF_UP).  At this point all resources needed
1107  * for transmit and receive operations are allocated, the interrupt
1108  * handler is registered with the OS, the watchdog timer is started,
1109  * and the stack is notified that the interface is ready.
1110  **/
1111
1112 static int
1113 e1000_open(struct net_device *netdev)
1114 {
1115         struct e1000_adapter *adapter = netdev_priv(netdev);
1116         int err;
1117
1118         /* allocate transmit descriptors */
1119
1120         if ((err = e1000_setup_all_tx_resources(adapter)))
1121                 goto err_setup_tx;
1122
1123         /* allocate receive descriptors */
1124
1125         if ((err = e1000_setup_all_rx_resources(adapter)))
1126                 goto err_setup_rx;
1127
1128         if ((err = e1000_up(adapter)))
1129                 goto err_up;
1130         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1131         if ((adapter->hw.mng_cookie.status &
1132                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1133                 e1000_update_mng_vlan(adapter);
1134         }
1135
1136         /* If AMT is enabled, let the firmware know that the network
1137          * interface is now open */
1138         if (adapter->hw.mac_type == e1000_82573 &&
1139             e1000_check_mng_mode(&adapter->hw))
1140                 e1000_get_hw_control(adapter);
1141
1142         return E1000_SUCCESS;
1143
1144 err_up:
1145         e1000_free_all_rx_resources(adapter);
1146 err_setup_rx:
1147         e1000_free_all_tx_resources(adapter);
1148 err_setup_tx:
1149         e1000_reset(adapter);
1150
1151         return err;
1152 }
1153
1154 /**
1155  * e1000_close - Disables a network interface
1156  * @netdev: network interface device structure
1157  *
1158  * Returns 0, this is not allowed to fail
1159  *
1160  * The close entry point is called when an interface is de-activated
1161  * by the OS.  The hardware is still under the drivers control, but
1162  * needs to be disabled.  A global MAC reset is issued to stop the
1163  * hardware, and all transmit and receive resources are freed.
1164  **/
1165
1166 static int
1167 e1000_close(struct net_device *netdev)
1168 {
1169         struct e1000_adapter *adapter = netdev_priv(netdev);
1170
1171         e1000_down(adapter);
1172
1173         e1000_free_all_tx_resources(adapter);
1174         e1000_free_all_rx_resources(adapter);
1175
1176         if ((adapter->hw.mng_cookie.status &
1177                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1178                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1179         }
1180
1181         /* If AMT is enabled, let the firmware know that the network
1182          * interface is now closed */
1183         if (adapter->hw.mac_type == e1000_82573 &&
1184             e1000_check_mng_mode(&adapter->hw))
1185                 e1000_release_hw_control(adapter);
1186
1187         return 0;
1188 }
1189
1190 /**
1191  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1192  * @adapter: address of board private structure
1193  * @start: address of beginning of memory
1194  * @len: length of memory
1195  **/
1196 static inline boolean_t
1197 e1000_check_64k_bound(struct e1000_adapter *adapter,
1198                       void *start, unsigned long len)
1199 {
1200         unsigned long begin = (unsigned long) start;
1201         unsigned long end = begin + len;
1202
1203         /* First rev 82545 and 82546 need to not allow any memory
1204          * write location to cross 64k boundary due to errata 23 */
1205         if (adapter->hw.mac_type == e1000_82545 ||
1206             adapter->hw.mac_type == e1000_82546) {
1207                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1208         }
1209
1210         return TRUE;
1211 }
1212
1213 /**
1214  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1215  * @adapter: board private structure
1216  * @txdr:    tx descriptor ring (for a specific queue) to setup
1217  *
1218  * Return 0 on success, negative on failure
1219  **/
1220
1221 static int
1222 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1223                          struct e1000_tx_ring *txdr)
1224 {
1225         struct pci_dev *pdev = adapter->pdev;
1226         int size;
1227
1228         size = sizeof(struct e1000_buffer) * txdr->count;
1229
1230         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1231         if (!txdr->buffer_info) {
1232                 DPRINTK(PROBE, ERR,
1233                 "Unable to allocate memory for the transmit descriptor ring\n");
1234                 return -ENOMEM;
1235         }
1236         memset(txdr->buffer_info, 0, size);
1237
1238         /* round up to nearest 4K */
1239
1240         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1241         E1000_ROUNDUP(txdr->size, 4096);
1242
1243         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1244         if (!txdr->desc) {
1245 setup_tx_desc_die:
1246                 vfree(txdr->buffer_info);
1247                 DPRINTK(PROBE, ERR,
1248                 "Unable to allocate memory for the transmit descriptor ring\n");
1249                 return -ENOMEM;
1250         }
1251
1252         /* Fix for errata 23, can't cross 64kB boundary */
1253         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1254                 void *olddesc = txdr->desc;
1255                 dma_addr_t olddma = txdr->dma;
1256                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1257                                      "at %p\n", txdr->size, txdr->desc);
1258                 /* Try again, without freeing the previous */
1259                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1260                 /* Failed allocation, critical failure */
1261                 if (!txdr->desc) {
1262                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1263                         goto setup_tx_desc_die;
1264                 }
1265
1266                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1267                         /* give up */
1268                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1269                                             txdr->dma);
1270                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1271                         DPRINTK(PROBE, ERR,
1272                                 "Unable to allocate aligned memory "
1273                                 "for the transmit descriptor ring\n");
1274                         vfree(txdr->buffer_info);
1275                         return -ENOMEM;
1276                 } else {
1277                         /* Free old allocation, new allocation was successful */
1278                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1279                 }
1280         }
1281         memset(txdr->desc, 0, txdr->size);
1282
1283         txdr->next_to_use = 0;
1284         txdr->next_to_clean = 0;
1285         spin_lock_init(&txdr->tx_lock);
1286
1287         return 0;
1288 }
1289
1290 /**
1291  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1292  *                                (Descriptors) for all queues
1293  * @adapter: board private structure
1294  *
1295  * If this function returns with an error, then it's possible one or
1296  * more of the rings is populated (while the rest are not).  It is the
1297  * callers duty to clean those orphaned rings.
1298  *
1299  * Return 0 on success, negative on failure
1300  **/
1301
1302 int
1303 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1304 {
1305         int i, err = 0;
1306
1307         for (i = 0; i < adapter->num_tx_queues; i++) {
1308                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1309                 if (err) {
1310                         DPRINTK(PROBE, ERR,
1311                                 "Allocation for Tx Queue %u failed\n", i);
1312                         break;
1313                 }
1314         }
1315
1316         return err;
1317 }
1318
1319 /**
1320  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1321  * @adapter: board private structure
1322  *
1323  * Configure the Tx unit of the MAC after a reset.
1324  **/
1325
1326 static void
1327 e1000_configure_tx(struct e1000_adapter *adapter)
1328 {
1329         uint64_t tdba;
1330         struct e1000_hw *hw = &adapter->hw;
1331         uint32_t tdlen, tctl, tipg, tarc;
1332         uint32_t ipgr1, ipgr2;
1333
1334         /* Setup the HW Tx Head and Tail descriptor pointers */
1335
1336         switch (adapter->num_tx_queues) {
1337         case 1:
1338         default:
1339                 tdba = adapter->tx_ring[0].dma;
1340                 tdlen = adapter->tx_ring[0].count *
1341                         sizeof(struct e1000_tx_desc);
1342                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1343                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1344                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1345                 E1000_WRITE_REG(hw, TDH, 0);
1346                 E1000_WRITE_REG(hw, TDT, 0);
1347                 adapter->tx_ring[0].tdh = E1000_TDH;
1348                 adapter->tx_ring[0].tdt = E1000_TDT;
1349                 break;
1350         }
1351
1352         /* Set the default values for the Tx Inter Packet Gap timer */
1353
1354         if (hw->media_type == e1000_media_type_fiber ||
1355             hw->media_type == e1000_media_type_internal_serdes)
1356                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1357         else
1358                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1359
1360         switch (hw->mac_type) {
1361         case e1000_82542_rev2_0:
1362         case e1000_82542_rev2_1:
1363                 tipg = DEFAULT_82542_TIPG_IPGT;
1364                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1365                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1366                 break;
1367         case e1000_80003es2lan:
1368                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1369                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1370                 break;
1371         default:
1372                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1373                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1374                 break;
1375         }
1376         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1377         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1378         E1000_WRITE_REG(hw, TIPG, tipg);
1379
1380         /* Set the Tx Interrupt Delay register */
1381
1382         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1383         if (hw->mac_type >= e1000_82540)
1384                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1385
1386         /* Program the Transmit Control Register */
1387
1388         tctl = E1000_READ_REG(hw, TCTL);
1389
1390         tctl &= ~E1000_TCTL_CT;
1391         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1392                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1393
1394 #ifdef DISABLE_MULR
1395         /* disable Multiple Reads for debugging */
1396         tctl &= ~E1000_TCTL_MULR;
1397 #endif
1398
1399         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1400                 tarc = E1000_READ_REG(hw, TARC0);
1401                 tarc |= ((1 << 25) | (1 << 21));
1402                 E1000_WRITE_REG(hw, TARC0, tarc);
1403                 tarc = E1000_READ_REG(hw, TARC1);
1404                 tarc |= (1 << 25);
1405                 if (tctl & E1000_TCTL_MULR)
1406                         tarc &= ~(1 << 28);
1407                 else
1408                         tarc |= (1 << 28);
1409                 E1000_WRITE_REG(hw, TARC1, tarc);
1410         } else if (hw->mac_type == e1000_80003es2lan) {
1411                 tarc = E1000_READ_REG(hw, TARC0);
1412                 tarc |= 1;
1413                 if (hw->media_type == e1000_media_type_internal_serdes)
1414                         tarc |= (1 << 20);
1415                 E1000_WRITE_REG(hw, TARC0, tarc);
1416                 tarc = E1000_READ_REG(hw, TARC1);
1417                 tarc |= 1;
1418                 E1000_WRITE_REG(hw, TARC1, tarc);
1419         }
1420
1421         e1000_config_collision_dist(hw);
1422
1423         /* Setup Transmit Descriptor Settings for eop descriptor */
1424         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1425                 E1000_TXD_CMD_IFCS;
1426
1427         if (hw->mac_type < e1000_82543)
1428                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1429         else
1430                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1431
1432         /* Cache if we're 82544 running in PCI-X because we'll
1433          * need this to apply a workaround later in the send path. */
1434         if (hw->mac_type == e1000_82544 &&
1435             hw->bus_type == e1000_bus_type_pcix)
1436                 adapter->pcix_82544 = 1;
1437
1438         E1000_WRITE_REG(hw, TCTL, tctl);
1439
1440 }
1441
1442 /**
1443  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1444  * @adapter: board private structure
1445  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1446  *
1447  * Returns 0 on success, negative on failure
1448  **/
1449
1450 static int
1451 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1452                          struct e1000_rx_ring *rxdr)
1453 {
1454         struct pci_dev *pdev = adapter->pdev;
1455         int size, desc_len;
1456
1457         size = sizeof(struct e1000_buffer) * rxdr->count;
1458         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1459         if (!rxdr->buffer_info) {
1460                 DPRINTK(PROBE, ERR,
1461                 "Unable to allocate memory for the receive descriptor ring\n");
1462                 return -ENOMEM;
1463         }
1464         memset(rxdr->buffer_info, 0, size);
1465
1466         size = sizeof(struct e1000_ps_page) * rxdr->count;
1467         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1468         if (!rxdr->ps_page) {
1469                 vfree(rxdr->buffer_info);
1470                 DPRINTK(PROBE, ERR,
1471                 "Unable to allocate memory for the receive descriptor ring\n");
1472                 return -ENOMEM;
1473         }
1474         memset(rxdr->ps_page, 0, size);
1475
1476         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1477         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1478         if (!rxdr->ps_page_dma) {
1479                 vfree(rxdr->buffer_info);
1480                 kfree(rxdr->ps_page);
1481                 DPRINTK(PROBE, ERR,
1482                 "Unable to allocate memory for the receive descriptor ring\n");
1483                 return -ENOMEM;
1484         }
1485         memset(rxdr->ps_page_dma, 0, size);
1486
1487         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1488                 desc_len = sizeof(struct e1000_rx_desc);
1489         else
1490                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1491
1492         /* Round up to nearest 4K */
1493
1494         rxdr->size = rxdr->count * desc_len;
1495         E1000_ROUNDUP(rxdr->size, 4096);
1496
1497         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1498
1499         if (!rxdr->desc) {
1500                 DPRINTK(PROBE, ERR,
1501                 "Unable to allocate memory for the receive descriptor ring\n");
1502 setup_rx_desc_die:
1503                 vfree(rxdr->buffer_info);
1504                 kfree(rxdr->ps_page);
1505                 kfree(rxdr->ps_page_dma);
1506                 return -ENOMEM;
1507         }
1508
1509         /* Fix for errata 23, can't cross 64kB boundary */
1510         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1511                 void *olddesc = rxdr->desc;
1512                 dma_addr_t olddma = rxdr->dma;
1513                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1514                                      "at %p\n", rxdr->size, rxdr->desc);
1515                 /* Try again, without freeing the previous */
1516                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1517                 /* Failed allocation, critical failure */
1518                 if (!rxdr->desc) {
1519                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1520                         DPRINTK(PROBE, ERR,
1521                                 "Unable to allocate memory "
1522                                 "for the receive descriptor ring\n");
1523                         goto setup_rx_desc_die;
1524                 }
1525
1526                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1527                         /* give up */
1528                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1529                                             rxdr->dma);
1530                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1531                         DPRINTK(PROBE, ERR,
1532                                 "Unable to allocate aligned memory "
1533                                 "for the receive descriptor ring\n");
1534                         goto setup_rx_desc_die;
1535                 } else {
1536                         /* Free old allocation, new allocation was successful */
1537                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1538                 }
1539         }
1540         memset(rxdr->desc, 0, rxdr->size);
1541
1542         rxdr->next_to_clean = 0;
1543         rxdr->next_to_use = 0;
1544
1545         return 0;
1546 }
1547
1548 /**
1549  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1550  *                                (Descriptors) for all queues
1551  * @adapter: board private structure
1552  *
1553  * If this function returns with an error, then it's possible one or
1554  * more of the rings is populated (while the rest are not).  It is the
1555  * callers duty to clean those orphaned rings.
1556  *
1557  * Return 0 on success, negative on failure
1558  **/
1559
1560 int
1561 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1562 {
1563         int i, err = 0;
1564
1565         for (i = 0; i < adapter->num_rx_queues; i++) {
1566                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1567                 if (err) {
1568                         DPRINTK(PROBE, ERR,
1569                                 "Allocation for Rx Queue %u failed\n", i);
1570                         break;
1571                 }
1572         }
1573
1574         return err;
1575 }
1576
1577 /**
1578  * e1000_setup_rctl - configure the receive control registers
1579  * @adapter: Board private structure
1580  **/
1581 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1582                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1583 static void
1584 e1000_setup_rctl(struct e1000_adapter *adapter)
1585 {
1586         uint32_t rctl, rfctl;
1587         uint32_t psrctl = 0;
1588 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1589         uint32_t pages = 0;
1590 #endif
1591
1592         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1593
1594         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1595
1596         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1597                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1598                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1599
1600         if (adapter->hw.mac_type > e1000_82543)
1601                 rctl |= E1000_RCTL_SECRC;
1602
1603         if (adapter->hw.tbi_compatibility_on == 1)
1604                 rctl |= E1000_RCTL_SBP;
1605         else
1606                 rctl &= ~E1000_RCTL_SBP;
1607
1608         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1609                 rctl &= ~E1000_RCTL_LPE;
1610         else
1611                 rctl |= E1000_RCTL_LPE;
1612
1613         /* Setup buffer sizes */
1614         if (adapter->hw.mac_type >= e1000_82571) {
1615                 /* We can now specify buffers in 1K increments.
1616                  * BSIZE and BSEX are ignored in this case. */
1617                 rctl |= adapter->rx_buffer_len << 0x11;
1618         } else {
1619                 rctl &= ~E1000_RCTL_SZ_4096;
1620                 rctl |= E1000_RCTL_BSEX;
1621                 switch (adapter->rx_buffer_len) {
1622                 case E1000_RXBUFFER_2048:
1623                 default:
1624                         rctl |= E1000_RCTL_SZ_2048;
1625                         rctl &= ~E1000_RCTL_BSEX;
1626                         break;
1627                 case E1000_RXBUFFER_4096:
1628                         rctl |= E1000_RCTL_SZ_4096;
1629                         break;
1630                 case E1000_RXBUFFER_8192:
1631                         rctl |= E1000_RCTL_SZ_8192;
1632                         break;
1633                 case E1000_RXBUFFER_16384:
1634                         rctl |= E1000_RCTL_SZ_16384;
1635                         break;
1636                 }
1637         }
1638
1639 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1640         /* 82571 and greater support packet-split where the protocol
1641          * header is placed in skb->data and the packet data is
1642          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1643          * In the case of a non-split, skb->data is linearly filled,
1644          * followed by the page buffers.  Therefore, skb->data is
1645          * sized to hold the largest protocol header.
1646          */
1647         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1648         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1649             PAGE_SIZE <= 16384)
1650                 adapter->rx_ps_pages = pages;
1651         else
1652                 adapter->rx_ps_pages = 0;
1653 #endif
1654         if (adapter->rx_ps_pages) {
1655                 /* Configure extra packet-split registers */
1656                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1657                 rfctl |= E1000_RFCTL_EXTEN;
1658                 /* disable IPv6 packet split support */
1659                 rfctl |= E1000_RFCTL_IPV6_DIS;
1660                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1661
1662                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1663
1664                 psrctl |= adapter->rx_ps_bsize0 >>
1665                         E1000_PSRCTL_BSIZE0_SHIFT;
1666
1667                 switch (adapter->rx_ps_pages) {
1668                 case 3:
1669                         psrctl |= PAGE_SIZE <<
1670                                 E1000_PSRCTL_BSIZE3_SHIFT;
1671                 case 2:
1672                         psrctl |= PAGE_SIZE <<
1673                                 E1000_PSRCTL_BSIZE2_SHIFT;
1674                 case 1:
1675                         psrctl |= PAGE_SIZE >>
1676                                 E1000_PSRCTL_BSIZE1_SHIFT;
1677                         break;
1678                 }
1679
1680                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1681         }
1682
1683         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1684 }
1685
1686 /**
1687  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1688  * @adapter: board private structure
1689  *
1690  * Configure the Rx unit of the MAC after a reset.
1691  **/
1692
1693 static void
1694 e1000_configure_rx(struct e1000_adapter *adapter)
1695 {
1696         uint64_t rdba;
1697         struct e1000_hw *hw = &adapter->hw;
1698         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1699
1700         if (adapter->rx_ps_pages) {
1701                 /* this is a 32 byte descriptor */
1702                 rdlen = adapter->rx_ring[0].count *
1703                         sizeof(union e1000_rx_desc_packet_split);
1704                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1705                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1706         } else {
1707                 rdlen = adapter->rx_ring[0].count *
1708                         sizeof(struct e1000_rx_desc);
1709                 adapter->clean_rx = e1000_clean_rx_irq;
1710                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1711         }
1712
1713         /* disable receives while setting up the descriptors */
1714         rctl = E1000_READ_REG(hw, RCTL);
1715         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1716
1717         /* set the Receive Delay Timer Register */
1718         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1719
1720         if (hw->mac_type >= e1000_82540) {
1721                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1722                 if (adapter->itr > 1)
1723                         E1000_WRITE_REG(hw, ITR,
1724                                 1000000000 / (adapter->itr * 256));
1725         }
1726
1727         if (hw->mac_type >= e1000_82571) {
1728                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1729                 /* Reset delay timers after every interrupt */
1730                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1731 #ifdef CONFIG_E1000_NAPI
1732                 /* Auto-Mask interrupts upon ICR read. */
1733                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1734 #endif
1735                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1736                 E1000_WRITE_REG(hw, IAM, ~0);
1737                 E1000_WRITE_FLUSH(hw);
1738         }
1739
1740         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1741          * the Base and Length of the Rx Descriptor Ring */
1742         switch (adapter->num_rx_queues) {
1743         case 1:
1744         default:
1745                 rdba = adapter->rx_ring[0].dma;
1746                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1747                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1748                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1749                 E1000_WRITE_REG(hw, RDH, 0);
1750                 E1000_WRITE_REG(hw, RDT, 0);
1751                 adapter->rx_ring[0].rdh = E1000_RDH;
1752                 adapter->rx_ring[0].rdt = E1000_RDT;
1753                 break;
1754         }
1755
1756         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1757         if (hw->mac_type >= e1000_82543) {
1758                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1759                 if (adapter->rx_csum == TRUE) {
1760                         rxcsum |= E1000_RXCSUM_TUOFL;
1761
1762                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1763                          * Must be used in conjunction with packet-split. */
1764                         if ((hw->mac_type >= e1000_82571) &&
1765                             (adapter->rx_ps_pages)) {
1766                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1767                         }
1768                 } else {
1769                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1770                         /* don't need to clear IPPCSE as it defaults to 0 */
1771                 }
1772                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1773         }
1774
1775         if (hw->mac_type == e1000_82573)
1776                 E1000_WRITE_REG(hw, ERT, 0x0100);
1777
1778         /* Enable Receives */
1779         E1000_WRITE_REG(hw, RCTL, rctl);
1780 }
1781
1782 /**
1783  * e1000_free_tx_resources - Free Tx Resources per Queue
1784  * @adapter: board private structure
1785  * @tx_ring: Tx descriptor ring for a specific queue
1786  *
1787  * Free all transmit software resources
1788  **/
1789
1790 static void
1791 e1000_free_tx_resources(struct e1000_adapter *adapter,
1792                         struct e1000_tx_ring *tx_ring)
1793 {
1794         struct pci_dev *pdev = adapter->pdev;
1795
1796         e1000_clean_tx_ring(adapter, tx_ring);
1797
1798         vfree(tx_ring->buffer_info);
1799         tx_ring->buffer_info = NULL;
1800
1801         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1802
1803         tx_ring->desc = NULL;
1804 }
1805
1806 /**
1807  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1808  * @adapter: board private structure
1809  *
1810  * Free all transmit software resources
1811  **/
1812
1813 void
1814 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1815 {
1816         int i;
1817
1818         for (i = 0; i < adapter->num_tx_queues; i++)
1819                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1820 }
1821
1822 static inline void
1823 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1824                         struct e1000_buffer *buffer_info)
1825 {
1826         if (buffer_info->dma) {
1827                 pci_unmap_page(adapter->pdev,
1828                                 buffer_info->dma,
1829                                 buffer_info->length,
1830                                 PCI_DMA_TODEVICE);
1831         }
1832         if (buffer_info->skb)
1833                 dev_kfree_skb_any(buffer_info->skb);
1834         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1835 }
1836
1837 /**
1838  * e1000_clean_tx_ring - Free Tx Buffers
1839  * @adapter: board private structure
1840  * @tx_ring: ring to be cleaned
1841  **/
1842
1843 static void
1844 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1845                     struct e1000_tx_ring *tx_ring)
1846 {
1847         struct e1000_buffer *buffer_info;
1848         unsigned long size;
1849         unsigned int i;
1850
1851         /* Free all the Tx ring sk_buffs */
1852
1853         for (i = 0; i < tx_ring->count; i++) {
1854                 buffer_info = &tx_ring->buffer_info[i];
1855                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1856         }
1857
1858         size = sizeof(struct e1000_buffer) * tx_ring->count;
1859         memset(tx_ring->buffer_info, 0, size);
1860
1861         /* Zero out the descriptor ring */
1862
1863         memset(tx_ring->desc, 0, tx_ring->size);
1864
1865         tx_ring->next_to_use = 0;
1866         tx_ring->next_to_clean = 0;
1867         tx_ring->last_tx_tso = 0;
1868
1869         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1870         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1871 }
1872
1873 /**
1874  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1875  * @adapter: board private structure
1876  **/
1877
1878 static void
1879 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1880 {
1881         int i;
1882
1883         for (i = 0; i < adapter->num_tx_queues; i++)
1884                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1885 }
1886
1887 /**
1888  * e1000_free_rx_resources - Free Rx Resources
1889  * @adapter: board private structure
1890  * @rx_ring: ring to clean the resources from
1891  *
1892  * Free all receive software resources
1893  **/
1894
1895 static void
1896 e1000_free_rx_resources(struct e1000_adapter *adapter,
1897                         struct e1000_rx_ring *rx_ring)
1898 {
1899         struct pci_dev *pdev = adapter->pdev;
1900
1901         e1000_clean_rx_ring(adapter, rx_ring);
1902
1903         vfree(rx_ring->buffer_info);
1904         rx_ring->buffer_info = NULL;
1905         kfree(rx_ring->ps_page);
1906         rx_ring->ps_page = NULL;
1907         kfree(rx_ring->ps_page_dma);
1908         rx_ring->ps_page_dma = NULL;
1909
1910         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1911
1912         rx_ring->desc = NULL;
1913 }
1914
1915 /**
1916  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1917  * @adapter: board private structure
1918  *
1919  * Free all receive software resources
1920  **/
1921
1922 void
1923 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1924 {
1925         int i;
1926
1927         for (i = 0; i < adapter->num_rx_queues; i++)
1928                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1929 }
1930
1931 /**
1932  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1933  * @adapter: board private structure
1934  * @rx_ring: ring to free buffers from
1935  **/
1936
1937 static void
1938 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1939                     struct e1000_rx_ring *rx_ring)
1940 {
1941         struct e1000_buffer *buffer_info;
1942         struct e1000_ps_page *ps_page;
1943         struct e1000_ps_page_dma *ps_page_dma;
1944         struct pci_dev *pdev = adapter->pdev;
1945         unsigned long size;
1946         unsigned int i, j;
1947
1948         /* Free all the Rx ring sk_buffs */
1949         for (i = 0; i < rx_ring->count; i++) {
1950                 buffer_info = &rx_ring->buffer_info[i];
1951                 if (buffer_info->skb) {
1952                         pci_unmap_single(pdev,
1953                                          buffer_info->dma,
1954                                          buffer_info->length,
1955                                          PCI_DMA_FROMDEVICE);
1956
1957                         dev_kfree_skb(buffer_info->skb);
1958                         buffer_info->skb = NULL;
1959                 }
1960                 ps_page = &rx_ring->ps_page[i];
1961                 ps_page_dma = &rx_ring->ps_page_dma[i];
1962                 for (j = 0; j < adapter->rx_ps_pages; j++) {
1963                         if (!ps_page->ps_page[j]) break;
1964                         pci_unmap_page(pdev,
1965                                        ps_page_dma->ps_page_dma[j],
1966                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
1967                         ps_page_dma->ps_page_dma[j] = 0;
1968                         put_page(ps_page->ps_page[j]);
1969                         ps_page->ps_page[j] = NULL;
1970                 }
1971         }
1972
1973         size = sizeof(struct e1000_buffer) * rx_ring->count;
1974         memset(rx_ring->buffer_info, 0, size);
1975         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1976         memset(rx_ring->ps_page, 0, size);
1977         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1978         memset(rx_ring->ps_page_dma, 0, size);
1979
1980         /* Zero out the descriptor ring */
1981
1982         memset(rx_ring->desc, 0, rx_ring->size);
1983
1984         rx_ring->next_to_clean = 0;
1985         rx_ring->next_to_use = 0;
1986
1987         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1988         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1989 }
1990
1991 /**
1992  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
1993  * @adapter: board private structure
1994  **/
1995
1996 static void
1997 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
1998 {
1999         int i;
2000
2001         for (i = 0; i < adapter->num_rx_queues; i++)
2002                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2003 }
2004
2005 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2006  * and memory write and invalidate disabled for certain operations
2007  */
2008 static void
2009 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2010 {
2011         struct net_device *netdev = adapter->netdev;
2012         uint32_t rctl;
2013
2014         e1000_pci_clear_mwi(&adapter->hw);
2015
2016         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2017         rctl |= E1000_RCTL_RST;
2018         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2019         E1000_WRITE_FLUSH(&adapter->hw);
2020         mdelay(5);
2021
2022         if (netif_running(netdev))
2023                 e1000_clean_all_rx_rings(adapter);
2024 }
2025
2026 static void
2027 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2028 {
2029         struct net_device *netdev = adapter->netdev;
2030         uint32_t rctl;
2031
2032         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2033         rctl &= ~E1000_RCTL_RST;
2034         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2035         E1000_WRITE_FLUSH(&adapter->hw);
2036         mdelay(5);
2037
2038         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2039                 e1000_pci_set_mwi(&adapter->hw);
2040
2041         if (netif_running(netdev)) {
2042                 /* No need to loop, because 82542 supports only 1 queue */
2043                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2044                 e1000_configure_rx(adapter);
2045                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2046         }
2047 }
2048
2049 /**
2050  * e1000_set_mac - Change the Ethernet Address of the NIC
2051  * @netdev: network interface device structure
2052  * @p: pointer to an address structure
2053  *
2054  * Returns 0 on success, negative on failure
2055  **/
2056
2057 static int
2058 e1000_set_mac(struct net_device *netdev, void *p)
2059 {
2060         struct e1000_adapter *adapter = netdev_priv(netdev);
2061         struct sockaddr *addr = p;
2062
2063         if (!is_valid_ether_addr(addr->sa_data))
2064                 return -EADDRNOTAVAIL;
2065
2066         /* 82542 2.0 needs to be in reset to write receive address registers */
2067
2068         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2069                 e1000_enter_82542_rst(adapter);
2070
2071         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2072         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2073
2074         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2075
2076         /* With 82571 controllers, LAA may be overwritten (with the default)
2077          * due to controller reset from the other port. */
2078         if (adapter->hw.mac_type == e1000_82571) {
2079                 /* activate the work around */
2080                 adapter->hw.laa_is_present = 1;
2081
2082                 /* Hold a copy of the LAA in RAR[14] This is done so that
2083                  * between the time RAR[0] gets clobbered  and the time it
2084                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2085                  * of the RARs and no incoming packets directed to this port
2086                  * are dropped. Eventaully the LAA will be in RAR[0] and
2087                  * RAR[14] */
2088                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2089                                         E1000_RAR_ENTRIES - 1);
2090         }
2091
2092         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2093                 e1000_leave_82542_rst(adapter);
2094
2095         return 0;
2096 }
2097
2098 /**
2099  * e1000_set_multi - Multicast and Promiscuous mode set
2100  * @netdev: network interface device structure
2101  *
2102  * The set_multi entry point is called whenever the multicast address
2103  * list or the network interface flags are updated.  This routine is
2104  * responsible for configuring the hardware for proper multicast,
2105  * promiscuous mode, and all-multi behavior.
2106  **/
2107
2108 static void
2109 e1000_set_multi(struct net_device *netdev)
2110 {
2111         struct e1000_adapter *adapter = netdev_priv(netdev);
2112         struct e1000_hw *hw = &adapter->hw;
2113         struct dev_mc_list *mc_ptr;
2114         uint32_t rctl;
2115         uint32_t hash_value;
2116         int i, rar_entries = E1000_RAR_ENTRIES;
2117
2118         /* reserve RAR[14] for LAA over-write work-around */
2119         if (adapter->hw.mac_type == e1000_82571)
2120                 rar_entries--;
2121
2122         /* Check for Promiscuous and All Multicast modes */
2123
2124         rctl = E1000_READ_REG(hw, RCTL);
2125
2126         if (netdev->flags & IFF_PROMISC) {
2127                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2128         } else if (netdev->flags & IFF_ALLMULTI) {
2129                 rctl |= E1000_RCTL_MPE;
2130                 rctl &= ~E1000_RCTL_UPE;
2131         } else {
2132                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2133         }
2134
2135         E1000_WRITE_REG(hw, RCTL, rctl);
2136
2137         /* 82542 2.0 needs to be in reset to write receive address registers */
2138
2139         if (hw->mac_type == e1000_82542_rev2_0)
2140                 e1000_enter_82542_rst(adapter);
2141
2142         /* load the first 14 multicast address into the exact filters 1-14
2143          * RAR 0 is used for the station MAC adddress
2144          * if there are not 14 addresses, go ahead and clear the filters
2145          * -- with 82571 controllers only 0-13 entries are filled here
2146          */
2147         mc_ptr = netdev->mc_list;
2148
2149         for (i = 1; i < rar_entries; i++) {
2150                 if (mc_ptr) {
2151                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2152                         mc_ptr = mc_ptr->next;
2153                 } else {
2154                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2155                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2156                 }
2157         }
2158
2159         /* clear the old settings from the multicast hash table */
2160
2161         for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2162                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2163
2164         /* load any remaining addresses into the hash table */
2165
2166         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2167                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2168                 e1000_mta_set(hw, hash_value);
2169         }
2170
2171         if (hw->mac_type == e1000_82542_rev2_0)
2172                 e1000_leave_82542_rst(adapter);
2173 }
2174
2175 /* Need to wait a few seconds after link up to get diagnostic information from
2176  * the phy */
2177
2178 static void
2179 e1000_update_phy_info(unsigned long data)
2180 {
2181         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2182         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2183 }
2184
2185 /**
2186  * e1000_82547_tx_fifo_stall - Timer Call-back
2187  * @data: pointer to adapter cast into an unsigned long
2188  **/
2189
2190 static void
2191 e1000_82547_tx_fifo_stall(unsigned long data)
2192 {
2193         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2194         struct net_device *netdev = adapter->netdev;
2195         uint32_t tctl;
2196
2197         if (atomic_read(&adapter->tx_fifo_stall)) {
2198                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2199                     E1000_READ_REG(&adapter->hw, TDH)) &&
2200                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2201                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2202                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2203                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2204                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2205                         E1000_WRITE_REG(&adapter->hw, TCTL,
2206                                         tctl & ~E1000_TCTL_EN);
2207                         E1000_WRITE_REG(&adapter->hw, TDFT,
2208                                         adapter->tx_head_addr);
2209                         E1000_WRITE_REG(&adapter->hw, TDFH,
2210                                         adapter->tx_head_addr);
2211                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2212                                         adapter->tx_head_addr);
2213                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2214                                         adapter->tx_head_addr);
2215                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2216                         E1000_WRITE_FLUSH(&adapter->hw);
2217
2218                         adapter->tx_fifo_head = 0;
2219                         atomic_set(&adapter->tx_fifo_stall, 0);
2220                         netif_wake_queue(netdev);
2221                 } else {
2222                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2223                 }
2224         }
2225 }
2226
2227 /**
2228  * e1000_watchdog - Timer Call-back
2229  * @data: pointer to adapter cast into an unsigned long
2230  **/
2231 static void
2232 e1000_watchdog(unsigned long data)
2233 {
2234         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2235
2236         /* Do the rest outside of interrupt context */
2237         schedule_work(&adapter->watchdog_task);
2238 }
2239
2240 static void
2241 e1000_watchdog_task(struct e1000_adapter *adapter)
2242 {
2243         struct net_device *netdev = adapter->netdev;
2244         struct e1000_tx_ring *txdr = adapter->tx_ring;
2245         uint32_t link, tctl;
2246
2247         e1000_check_for_link(&adapter->hw);
2248         if (adapter->hw.mac_type == e1000_82573) {
2249                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2250                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2251                         e1000_update_mng_vlan(adapter);
2252         }
2253
2254         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2255            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2256                 link = !adapter->hw.serdes_link_down;
2257         else
2258                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2259
2260         if (link) {
2261                 if (!netif_carrier_ok(netdev)) {
2262                         e1000_get_speed_and_duplex(&adapter->hw,
2263                                                    &adapter->link_speed,
2264                                                    &adapter->link_duplex);
2265
2266                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2267                                adapter->link_speed,
2268                                adapter->link_duplex == FULL_DUPLEX ?
2269                                "Full Duplex" : "Half Duplex");
2270
2271                         /* tweak tx_queue_len according to speed/duplex
2272                          * and adjust the timeout factor */
2273                         netdev->tx_queue_len = adapter->tx_queue_len;
2274                         adapter->tx_timeout_factor = 1;
2275                         adapter->txb2b = 1;
2276                         switch (adapter->link_speed) {
2277                         case SPEED_10:
2278                                 adapter->txb2b = 0;
2279                                 netdev->tx_queue_len = 10;
2280                                 adapter->tx_timeout_factor = 8;
2281                                 break;
2282                         case SPEED_100:
2283                                 adapter->txb2b = 0;
2284                                 netdev->tx_queue_len = 100;
2285                                 /* maybe add some timeout factor ? */
2286                                 break;
2287                         }
2288
2289                         if ((adapter->hw.mac_type == e1000_82571 ||
2290                              adapter->hw.mac_type == e1000_82572) &&
2291                             adapter->txb2b == 0) {
2292 #define SPEED_MODE_BIT (1 << 21)
2293                                 uint32_t tarc0;
2294                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2295                                 tarc0 &= ~SPEED_MODE_BIT;
2296                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2297                         }
2298
2299 #ifdef NETIF_F_TSO
2300                         /* disable TSO for pcie and 10/100 speeds, to avoid
2301                          * some hardware issues */
2302                         if (!adapter->tso_force &&
2303                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2304                                 switch (adapter->link_speed) {
2305                                 case SPEED_10:
2306                                 case SPEED_100:
2307                                         DPRINTK(PROBE,INFO,
2308                                         "10/100 speed: disabling TSO\n");
2309                                         netdev->features &= ~NETIF_F_TSO;
2310                                         break;
2311                                 case SPEED_1000:
2312                                         netdev->features |= NETIF_F_TSO;
2313                                         break;
2314                                 default:
2315                                         /* oops */
2316                                         break;
2317                                 }
2318                         }
2319 #endif
2320
2321                         /* enable transmits in the hardware, need to do this
2322                          * after setting TARC0 */
2323                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2324                         tctl |= E1000_TCTL_EN;
2325                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2326
2327                         netif_carrier_on(netdev);
2328                         netif_wake_queue(netdev);
2329                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2330                         adapter->smartspeed = 0;
2331                 }
2332         } else {
2333                 if (netif_carrier_ok(netdev)) {
2334                         adapter->link_speed = 0;
2335                         adapter->link_duplex = 0;
2336                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2337                         netif_carrier_off(netdev);
2338                         netif_stop_queue(netdev);
2339                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2340
2341                         /* 80003ES2LAN workaround--
2342                          * For packet buffer work-around on link down event;
2343                          * disable receives in the ISR and
2344                          * reset device here in the watchdog
2345                          */
2346                         if (adapter->hw.mac_type == e1000_80003es2lan) {
2347                                 /* reset device */
2348                                 schedule_work(&adapter->reset_task);
2349                         }
2350                 }
2351
2352                 e1000_smartspeed(adapter);
2353         }
2354
2355         e1000_update_stats(adapter);
2356
2357         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2358         adapter->tpt_old = adapter->stats.tpt;
2359         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2360         adapter->colc_old = adapter->stats.colc;
2361
2362         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2363         adapter->gorcl_old = adapter->stats.gorcl;
2364         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2365         adapter->gotcl_old = adapter->stats.gotcl;
2366
2367         e1000_update_adaptive(&adapter->hw);
2368
2369         if (!netif_carrier_ok(netdev)) {
2370                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2371                         /* We've lost link, so the controller stops DMA,
2372                          * but we've got queued Tx work that's never going
2373                          * to get done, so reset controller to flush Tx.
2374                          * (Do the reset outside of interrupt context). */
2375                         adapter->tx_timeout_count++;
2376                         schedule_work(&adapter->reset_task);
2377                 }
2378         }
2379
2380         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2381         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2382                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2383                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2384                  * else is between 2000-8000. */
2385                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2386                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2387                         adapter->gotcl - adapter->gorcl :
2388                         adapter->gorcl - adapter->gotcl) / 10000;
2389                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2390                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2391         }
2392
2393         /* Cause software interrupt to ensure rx ring is cleaned */
2394         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2395
2396         /* Force detection of hung controller every watchdog period */
2397         adapter->detect_tx_hung = TRUE;
2398
2399         /* With 82571 controllers, LAA may be overwritten due to controller
2400          * reset from the other port. Set the appropriate LAA in RAR[0] */
2401         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2402                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2403
2404         /* Reset the timer */
2405         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2406 }
2407
2408 #define E1000_TX_FLAGS_CSUM             0x00000001
2409 #define E1000_TX_FLAGS_VLAN             0x00000002
2410 #define E1000_TX_FLAGS_TSO              0x00000004
2411 #define E1000_TX_FLAGS_IPV4             0x00000008
2412 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2413 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2414
2415 static inline int
2416 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2417           struct sk_buff *skb)
2418 {
2419 #ifdef NETIF_F_TSO
2420         struct e1000_context_desc *context_desc;
2421         struct e1000_buffer *buffer_info;
2422         unsigned int i;
2423         uint32_t cmd_length = 0;
2424         uint16_t ipcse = 0, tucse, mss;
2425         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2426         int err;
2427
2428         if (skb_shinfo(skb)->tso_size) {
2429                 if (skb_header_cloned(skb)) {
2430                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2431                         if (err)
2432                                 return err;
2433                 }
2434
2435                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2436                 mss = skb_shinfo(skb)->tso_size;
2437                 if (skb->protocol == ntohs(ETH_P_IP)) {
2438                         skb->nh.iph->tot_len = 0;
2439                         skb->nh.iph->check = 0;
2440                         skb->h.th->check =
2441                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2442                                                    skb->nh.iph->daddr,
2443                                                    0,
2444                                                    IPPROTO_TCP,
2445                                                    0);
2446                         cmd_length = E1000_TXD_CMD_IP;
2447                         ipcse = skb->h.raw - skb->data - 1;
2448 #ifdef NETIF_F_TSO_IPV6
2449                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2450                         skb->nh.ipv6h->payload_len = 0;
2451                         skb->h.th->check =
2452                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2453                                                  &skb->nh.ipv6h->daddr,
2454                                                  0,
2455                                                  IPPROTO_TCP,
2456                                                  0);
2457                         ipcse = 0;
2458 #endif
2459                 }
2460                 ipcss = skb->nh.raw - skb->data;
2461                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2462                 tucss = skb->h.raw - skb->data;
2463                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2464                 tucse = 0;
2465
2466                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2467                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2468
2469                 i = tx_ring->next_to_use;
2470                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2471                 buffer_info = &tx_ring->buffer_info[i];
2472
2473                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2474                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2475                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2476                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2477                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2478                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2479                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2480                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2481                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2482
2483                 buffer_info->time_stamp = jiffies;
2484
2485                 if (++i == tx_ring->count) i = 0;
2486                 tx_ring->next_to_use = i;
2487
2488                 return TRUE;
2489         }
2490 #endif
2491
2492         return FALSE;
2493 }
2494
2495 static inline boolean_t
2496 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2497               struct sk_buff *skb)
2498 {
2499         struct e1000_context_desc *context_desc;
2500         struct e1000_buffer *buffer_info;
2501         unsigned int i;
2502         uint8_t css;
2503
2504         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2505                 css = skb->h.raw - skb->data;
2506
2507                 i = tx_ring->next_to_use;
2508                 buffer_info = &tx_ring->buffer_info[i];
2509                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2510
2511                 context_desc->upper_setup.tcp_fields.tucss = css;
2512                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2513                 context_desc->upper_setup.tcp_fields.tucse = 0;
2514                 context_desc->tcp_seg_setup.data = 0;
2515                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2516
2517                 buffer_info->time_stamp = jiffies;
2518
2519                 if (unlikely(++i == tx_ring->count)) i = 0;
2520                 tx_ring->next_to_use = i;
2521
2522                 return TRUE;
2523         }
2524
2525         return FALSE;
2526 }
2527
2528 #define E1000_MAX_TXD_PWR       12
2529 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2530
2531 static inline int
2532 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2533              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2534              unsigned int nr_frags, unsigned int mss)
2535 {
2536         struct e1000_buffer *buffer_info;
2537         unsigned int len = skb->len;
2538         unsigned int offset = 0, size, count = 0, i;
2539         unsigned int f;
2540         len -= skb->data_len;
2541
2542         i = tx_ring->next_to_use;
2543
2544         while (len) {
2545                 buffer_info = &tx_ring->buffer_info[i];
2546                 size = min(len, max_per_txd);
2547 #ifdef NETIF_F_TSO
2548                 /* Workaround for Controller erratum --
2549                  * descriptor for non-tso packet in a linear SKB that follows a
2550                  * tso gets written back prematurely before the data is fully
2551                  * DMA'd to the controller */
2552                 if (!skb->data_len && tx_ring->last_tx_tso &&
2553                     !skb_shinfo(skb)->tso_size) {
2554                         tx_ring->last_tx_tso = 0;
2555                         size -= 4;
2556                 }
2557
2558                 /* Workaround for premature desc write-backs
2559                  * in TSO mode.  Append 4-byte sentinel desc */
2560                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2561                         size -= 4;
2562 #endif
2563                 /* work-around for errata 10 and it applies
2564                  * to all controllers in PCI-X mode
2565                  * The fix is to make sure that the first descriptor of a
2566                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2567                  */
2568                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2569                                 (size > 2015) && count == 0))
2570                         size = 2015;
2571
2572                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2573                  * terminating buffers within evenly-aligned dwords. */
2574                 if (unlikely(adapter->pcix_82544 &&
2575                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2576                    size > 4))
2577                         size -= 4;
2578
2579                 buffer_info->length = size;
2580                 buffer_info->dma =
2581                         pci_map_single(adapter->pdev,
2582                                 skb->data + offset,
2583                                 size,
2584                                 PCI_DMA_TODEVICE);
2585                 buffer_info->time_stamp = jiffies;
2586
2587                 len -= size;
2588                 offset += size;
2589                 count++;
2590                 if (unlikely(++i == tx_ring->count)) i = 0;
2591         }
2592
2593         for (f = 0; f < nr_frags; f++) {
2594                 struct skb_frag_struct *frag;
2595
2596                 frag = &skb_shinfo(skb)->frags[f];
2597                 len = frag->size;
2598                 offset = frag->page_offset;
2599
2600                 while (len) {
2601                         buffer_info = &tx_ring->buffer_info[i];
2602                         size = min(len, max_per_txd);
2603 #ifdef NETIF_F_TSO
2604                         /* Workaround for premature desc write-backs
2605                          * in TSO mode.  Append 4-byte sentinel desc */
2606                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2607                                 size -= 4;
2608 #endif
2609                         /* Workaround for potential 82544 hang in PCI-X.
2610                          * Avoid terminating buffers within evenly-aligned
2611                          * dwords. */
2612                         if (unlikely(adapter->pcix_82544 &&
2613                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2614                            size > 4))
2615                                 size -= 4;
2616
2617                         buffer_info->length = size;
2618                         buffer_info->dma =
2619                                 pci_map_page(adapter->pdev,
2620                                         frag->page,
2621                                         offset,
2622                                         size,
2623                                         PCI_DMA_TODEVICE);
2624                         buffer_info->time_stamp = jiffies;
2625
2626                         len -= size;
2627                         offset += size;
2628                         count++;
2629                         if (unlikely(++i == tx_ring->count)) i = 0;
2630                 }
2631         }
2632
2633         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2634         tx_ring->buffer_info[i].skb = skb;
2635         tx_ring->buffer_info[first].next_to_watch = i;
2636
2637         return count;
2638 }
2639
2640 static inline void
2641 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2642                int tx_flags, int count)
2643 {
2644         struct e1000_tx_desc *tx_desc = NULL;
2645         struct e1000_buffer *buffer_info;
2646         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2647         unsigned int i;
2648
2649         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2650                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2651                              E1000_TXD_CMD_TSE;
2652                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2653
2654                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2655                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2656         }
2657
2658         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2659                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2660                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2661         }
2662
2663         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2664                 txd_lower |= E1000_TXD_CMD_VLE;
2665                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2666         }
2667
2668         i = tx_ring->next_to_use;
2669
2670         while (count--) {
2671                 buffer_info = &tx_ring->buffer_info[i];
2672                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2673                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2674                 tx_desc->lower.data =
2675                         cpu_to_le32(txd_lower | buffer_info->length);
2676                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2677                 if (unlikely(++i == tx_ring->count)) i = 0;
2678         }
2679
2680         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2681
2682         /* Force memory writes to complete before letting h/w
2683          * know there are new descriptors to fetch.  (Only
2684          * applicable for weak-ordered memory model archs,
2685          * such as IA-64). */
2686         wmb();
2687
2688         tx_ring->next_to_use = i;
2689         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2690 }
2691
2692 /**
2693  * 82547 workaround to avoid controller hang in half-duplex environment.
2694  * The workaround is to avoid queuing a large packet that would span
2695  * the internal Tx FIFO ring boundary by notifying the stack to resend
2696  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2697  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2698  * to the beginning of the Tx FIFO.
2699  **/
2700
2701 #define E1000_FIFO_HDR                  0x10
2702 #define E1000_82547_PAD_LEN             0x3E0
2703
2704 static inline int
2705 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2706 {
2707         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2708         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2709
2710         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2711
2712         if (adapter->link_duplex != HALF_DUPLEX)
2713                 goto no_fifo_stall_required;
2714
2715         if (atomic_read(&adapter->tx_fifo_stall))
2716                 return 1;
2717
2718         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2719                 atomic_set(&adapter->tx_fifo_stall, 1);
2720                 return 1;
2721         }
2722
2723 no_fifo_stall_required:
2724         adapter->tx_fifo_head += skb_fifo_len;
2725         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2726                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2727         return 0;
2728 }
2729
2730 #define MINIMUM_DHCP_PACKET_SIZE 282
2731 static inline int
2732 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2733 {
2734         struct e1000_hw *hw =  &adapter->hw;
2735         uint16_t length, offset;
2736         if (vlan_tx_tag_present(skb)) {
2737                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2738                         ( adapter->hw.mng_cookie.status &
2739                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2740                         return 0;
2741         }
2742         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2743                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2744                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2745                         const struct iphdr *ip =
2746                                 (struct iphdr *)((uint8_t *)skb->data+14);
2747                         if (IPPROTO_UDP == ip->protocol) {
2748                                 struct udphdr *udp =
2749                                         (struct udphdr *)((uint8_t *)ip +
2750                                                 (ip->ihl << 2));
2751                                 if (ntohs(udp->dest) == 67) {
2752                                         offset = (uint8_t *)udp + 8 - skb->data;
2753                                         length = skb->len - offset;
2754
2755                                         return e1000_mng_write_dhcp_info(hw,
2756                                                         (uint8_t *)udp + 8,
2757                                                         length);
2758                                 }
2759                         }
2760                 }
2761         }
2762         return 0;
2763 }
2764
2765 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2766 static int
2767 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2768 {
2769         struct e1000_adapter *adapter = netdev_priv(netdev);
2770         struct e1000_tx_ring *tx_ring;
2771         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2772         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2773         unsigned int tx_flags = 0;
2774         unsigned int len = skb->len;
2775         unsigned long flags;
2776         unsigned int nr_frags = 0;
2777         unsigned int mss = 0;
2778         int count = 0;
2779         int tso;
2780         unsigned int f;
2781         len -= skb->data_len;
2782
2783         tx_ring = adapter->tx_ring;
2784
2785         if (unlikely(skb->len <= 0)) {
2786                 dev_kfree_skb_any(skb);
2787                 return NETDEV_TX_OK;
2788         }
2789
2790 #ifdef NETIF_F_TSO
2791         mss = skb_shinfo(skb)->tso_size;
2792         /* The controller does a simple calculation to
2793          * make sure there is enough room in the FIFO before
2794          * initiating the DMA for each buffer.  The calc is:
2795          * 4 = ceil(buffer len/mss).  To make sure we don't
2796          * overrun the FIFO, adjust the max buffer len if mss
2797          * drops. */
2798         if (mss) {
2799                 uint8_t hdr_len;
2800                 max_per_txd = min(mss << 2, max_per_txd);
2801                 max_txd_pwr = fls(max_per_txd) - 1;
2802
2803         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2804          * points to just header, pull a few bytes of payload from
2805          * frags into skb->data */
2806                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2807                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2808                         switch (adapter->hw.mac_type) {
2809                                 unsigned int pull_size;
2810                         case e1000_82571:
2811                         case e1000_82572:
2812                         case e1000_82573:
2813                                 pull_size = min((unsigned int)4, skb->data_len);
2814                                 if (!__pskb_pull_tail(skb, pull_size)) {
2815                                         printk(KERN_ERR
2816                                                 "__pskb_pull_tail failed.\n");
2817                                         dev_kfree_skb_any(skb);
2818                                         return -EFAULT;
2819                                 }
2820                                 len = skb->len - skb->data_len;
2821                                 break;
2822                         default:
2823                                 /* do nothing */
2824                                 break;
2825                         }
2826                 }
2827         }
2828
2829         /* reserve a descriptor for the offload context */
2830         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2831                 count++;
2832         count++;
2833 #else
2834         if (skb->ip_summed == CHECKSUM_HW)
2835                 count++;
2836 #endif
2837
2838 #ifdef NETIF_F_TSO
2839         /* Controller Erratum workaround */
2840         if (!skb->data_len && tx_ring->last_tx_tso &&
2841             !skb_shinfo(skb)->tso_size)
2842                 count++;
2843 #endif
2844
2845         count += TXD_USE_COUNT(len, max_txd_pwr);
2846
2847         if (adapter->pcix_82544)
2848                 count++;
2849
2850         /* work-around for errata 10 and it applies to all controllers
2851          * in PCI-X mode, so add one more descriptor to the count
2852          */
2853         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2854                         (len > 2015)))
2855                 count++;
2856
2857         nr_frags = skb_shinfo(skb)->nr_frags;
2858         for (f = 0; f < nr_frags; f++)
2859                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2860                                        max_txd_pwr);
2861         if (adapter->pcix_82544)
2862                 count += nr_frags;
2863
2864
2865         if (adapter->hw.tx_pkt_filtering &&
2866             (adapter->hw.mac_type == e1000_82573))
2867                 e1000_transfer_dhcp_info(adapter, skb);
2868
2869         local_irq_save(flags);
2870         if (!spin_trylock(&tx_ring->tx_lock)) {
2871                 /* Collision - tell upper layer to requeue */
2872                 local_irq_restore(flags);
2873                 return NETDEV_TX_LOCKED;
2874         }
2875
2876         /* need: count + 2 desc gap to keep tail from touching
2877          * head, otherwise try next time */
2878         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2879                 netif_stop_queue(netdev);
2880                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2881                 return NETDEV_TX_BUSY;
2882         }
2883
2884         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2885                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2886                         netif_stop_queue(netdev);
2887                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2888                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2889                         return NETDEV_TX_BUSY;
2890                 }
2891         }
2892
2893         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2894                 tx_flags |= E1000_TX_FLAGS_VLAN;
2895                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2896         }
2897
2898         first = tx_ring->next_to_use;
2899
2900         tso = e1000_tso(adapter, tx_ring, skb);
2901         if (tso < 0) {
2902                 dev_kfree_skb_any(skb);
2903                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2904                 return NETDEV_TX_OK;
2905         }
2906
2907         if (likely(tso)) {
2908                 tx_ring->last_tx_tso = 1;
2909                 tx_flags |= E1000_TX_FLAGS_TSO;
2910         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2911                 tx_flags |= E1000_TX_FLAGS_CSUM;
2912
2913         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2914          * 82571 hardware supports TSO capabilities for IPv6 as well...
2915          * no longer assume, we must. */
2916         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2917                 tx_flags |= E1000_TX_FLAGS_IPV4;
2918
2919         e1000_tx_queue(adapter, tx_ring, tx_flags,
2920                        e1000_tx_map(adapter, tx_ring, skb, first,
2921                                     max_per_txd, nr_frags, mss));
2922
2923         netdev->trans_start = jiffies;
2924
2925         /* Make sure there is space in the ring for the next send. */
2926         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2927                 netif_stop_queue(netdev);
2928
2929         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2930         return NETDEV_TX_OK;
2931 }
2932
2933 /**
2934  * e1000_tx_timeout - Respond to a Tx Hang
2935  * @netdev: network interface device structure
2936  **/
2937
2938 static void
2939 e1000_tx_timeout(struct net_device *netdev)
2940 {
2941         struct e1000_adapter *adapter = netdev_priv(netdev);
2942
2943         /* Do the reset outside of interrupt context */
2944         adapter->tx_timeout_count++;
2945         schedule_work(&adapter->reset_task);
2946 }
2947
2948 static void
2949 e1000_reset_task(struct net_device *netdev)
2950 {
2951         struct e1000_adapter *adapter = netdev_priv(netdev);
2952
2953         e1000_down(adapter);
2954         e1000_up(adapter);
2955 }
2956
2957 /**
2958  * e1000_get_stats - Get System Network Statistics
2959  * @netdev: network interface device structure
2960  *
2961  * Returns the address of the device statistics structure.
2962  * The statistics are actually updated from the timer callback.
2963  **/
2964
2965 static struct net_device_stats *
2966 e1000_get_stats(struct net_device *netdev)
2967 {
2968         struct e1000_adapter *adapter = netdev_priv(netdev);
2969
2970         /* only return the current stats */
2971         return &adapter->net_stats;
2972 }
2973
2974 /**
2975  * e1000_change_mtu - Change the Maximum Transfer Unit
2976  * @netdev: network interface device structure
2977  * @new_mtu: new value for maximum frame size
2978  *
2979  * Returns 0 on success, negative on failure
2980  **/
2981
2982 static int
2983 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2984 {
2985         struct e1000_adapter *adapter = netdev_priv(netdev);
2986         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2987         uint16_t eeprom_data = 0;
2988
2989         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2990             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2991                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2992                 return -EINVAL;
2993         }
2994
2995         /* Adapter-specific max frame size limits. */
2996         switch (adapter->hw.mac_type) {
2997         case e1000_82542_rev2_0:
2998         case e1000_82542_rev2_1:
2999                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3000                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3001                         return -EINVAL;
3002                 }
3003                 break;
3004         case e1000_82573:
3005                 /* only enable jumbo frames if ASPM is disabled completely
3006                  * this means both bits must be zero in 0x1A bits 3:2 */
3007                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3008                                   &eeprom_data);
3009                 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3010                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3011                                 DPRINTK(PROBE, ERR,
3012                                         "Jumbo Frames not supported.\n");
3013                                 return -EINVAL;
3014                         }
3015                         break;
3016                 }
3017                 /* fall through to get support */
3018         case e1000_82571:
3019         case e1000_82572:
3020         case e1000_80003es2lan:
3021 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3022                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3023                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3024                         return -EINVAL;
3025                 }
3026                 break;
3027         default:
3028                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3029                 break;
3030         }
3031
3032
3033         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3034                 adapter->rx_buffer_len = max_frame;
3035                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3036         } else {
3037                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
3038                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
3039                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
3040                                             "on 82542\n");
3041                         return -EINVAL;
3042                 } else {
3043                         if(max_frame <= E1000_RXBUFFER_2048)
3044                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3045                         else if(max_frame <= E1000_RXBUFFER_4096)
3046                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3047                         else if(max_frame <= E1000_RXBUFFER_8192)
3048                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3049                         else if(max_frame <= E1000_RXBUFFER_16384)
3050                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3051                 }
3052         }
3053
3054         netdev->mtu = new_mtu;
3055
3056         if (netif_running(netdev)) {
3057                 e1000_down(adapter);
3058                 e1000_up(adapter);
3059         }
3060
3061         adapter->hw.max_frame_size = max_frame;
3062
3063         return 0;
3064 }
3065
3066 /**
3067  * e1000_update_stats - Update the board statistics counters
3068  * @adapter: board private structure
3069  **/
3070
3071 void
3072 e1000_update_stats(struct e1000_adapter *adapter)
3073 {
3074         struct e1000_hw *hw = &adapter->hw;
3075         unsigned long flags;
3076         uint16_t phy_tmp;
3077
3078 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3079
3080         spin_lock_irqsave(&adapter->stats_lock, flags);
3081
3082         /* these counters are modified from e1000_adjust_tbi_stats,
3083          * called from the interrupt context, so they must only
3084          * be written while holding adapter->stats_lock
3085          */
3086
3087         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3088         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3089         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3090         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3091         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3092         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3093         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3094         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3095         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3096         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3097         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3098         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3099         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3100
3101         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3102         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3103         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3104         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3105         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3106         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3107         adapter->stats.dc += E1000_READ_REG(hw, DC);
3108         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3109         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3110         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3111         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3112         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3113         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3114         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3115         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3116         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3117         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3118         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3119         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3120         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3121         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3122         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3123         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3124         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3125         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3126         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3127         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3128         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3129         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3130         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3131         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3132         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3133         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3134         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3135
3136         /* used for adaptive IFS */
3137
3138         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3139         adapter->stats.tpt += hw->tx_packet_delta;
3140         hw->collision_delta = E1000_READ_REG(hw, COLC);
3141         adapter->stats.colc += hw->collision_delta;
3142
3143         if (hw->mac_type >= e1000_82543) {
3144                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3145                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3146                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3147                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3148                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3149                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3150         }
3151         if (hw->mac_type > e1000_82547_rev_2) {
3152                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3153                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3154                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3155                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3156                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3157                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3158                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3159                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3160                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3161         }
3162
3163         /* Fill out the OS statistics structure */
3164
3165         adapter->net_stats.rx_packets = adapter->stats.gprc;
3166         adapter->net_stats.tx_packets = adapter->stats.gptc;
3167         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3168         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3169         adapter->net_stats.multicast = adapter->stats.mprc;
3170         adapter->net_stats.collisions = adapter->stats.colc;
3171
3172         /* Rx Errors */
3173
3174         /* RLEC on some newer hardware can be incorrect so build
3175         * our own version based on RUC and ROC */
3176         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3177                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3178                 adapter->stats.ruc + adapter->stats.roc +
3179                 adapter->stats.cexterr;
3180         adapter->net_stats.rx_dropped = 0;
3181         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3182                                               adapter->stats.roc;
3183         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3184         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3185         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3186
3187         /* Tx Errors */
3188
3189         adapter->net_stats.tx_errors = adapter->stats.ecol +
3190                                        adapter->stats.latecol;
3191         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3192         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3193         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3194
3195         /* Tx Dropped needs to be maintained elsewhere */
3196
3197         /* Phy Stats */
3198
3199         if (hw->media_type == e1000_media_type_copper) {
3200                 if ((adapter->link_speed == SPEED_1000) &&
3201                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3202                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3203                         adapter->phy_stats.idle_errors += phy_tmp;
3204                 }
3205
3206                 if ((hw->mac_type <= e1000_82546) &&
3207                    (hw->phy_type == e1000_phy_m88) &&
3208                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3209                         adapter->phy_stats.receive_errors += phy_tmp;
3210         }
3211
3212         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3213 }
3214
3215 /**
3216  * e1000_intr - Interrupt Handler
3217  * @irq: interrupt number
3218  * @data: pointer to a network interface device structure
3219  * @pt_regs: CPU registers structure
3220  **/
3221
3222 static irqreturn_t
3223 e1000_intr(int irq, void *data, struct pt_regs *regs)
3224 {
3225         struct net_device *netdev = data;
3226         struct e1000_adapter *adapter = netdev_priv(netdev);
3227         struct e1000_hw *hw = &adapter->hw;
3228         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3229 #ifndef CONFIG_E1000_NAPI
3230         int i;
3231 #else
3232         /* Interrupt Auto-Mask...upon reading ICR,
3233          * interrupts are masked.  No need for the
3234          * IMC write, but it does mean we should
3235          * account for it ASAP. */
3236         if (likely(hw->mac_type >= e1000_82571))
3237                 atomic_inc(&adapter->irq_sem);
3238 #endif
3239
3240         if (unlikely(!icr)) {
3241 #ifdef CONFIG_E1000_NAPI
3242                 if (hw->mac_type >= e1000_82571)
3243                         e1000_irq_enable(adapter);
3244 #endif
3245                 return IRQ_NONE;  /* Not our interrupt */
3246         }
3247
3248         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3249                 hw->get_link_status = 1;
3250                 /* 80003ES2LAN workaround--
3251                  * For packet buffer work-around on link down event;
3252                  * disable receives here in the ISR and
3253                  * reset adapter in watchdog
3254                  */
3255                 if (netif_carrier_ok(netdev) &&
3256                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3257                         /* disable receives */
3258                         rctl = E1000_READ_REG(hw, RCTL);
3259                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3260                 }
3261                 mod_timer(&adapter->watchdog_timer, jiffies);
3262         }
3263
3264 #ifdef CONFIG_E1000_NAPI
3265         if (unlikely(hw->mac_type < e1000_82571)) {
3266                 atomic_inc(&adapter->irq_sem);
3267                 E1000_WRITE_REG(hw, IMC, ~0);
3268                 E1000_WRITE_FLUSH(hw);
3269         }
3270         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3271                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3272         else
3273                 e1000_irq_enable(adapter);
3274 #else
3275         /* Writing IMC and IMS is needed for 82547.
3276          * Due to Hub Link bus being occupied, an interrupt
3277          * de-assertion message is not able to be sent.
3278          * When an interrupt assertion message is generated later,
3279          * two messages are re-ordered and sent out.
3280          * That causes APIC to think 82547 is in de-assertion
3281          * state, while 82547 is in assertion state, resulting
3282          * in dead lock. Writing IMC forces 82547 into
3283          * de-assertion state.
3284          */
3285         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3286                 atomic_inc(&adapter->irq_sem);
3287                 E1000_WRITE_REG(hw, IMC, ~0);
3288         }
3289
3290         for (i = 0; i < E1000_MAX_INTR; i++)
3291                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3292                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3293                         break;
3294
3295         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3296                 e1000_irq_enable(adapter);
3297
3298 #endif
3299
3300         return IRQ_HANDLED;
3301 }
3302
3303 #ifdef CONFIG_E1000_NAPI
3304 /**
3305  * e1000_clean - NAPI Rx polling callback
3306  * @adapter: board private structure
3307  **/
3308
3309 static int
3310 e1000_clean(struct net_device *poll_dev, int *budget)
3311 {
3312         struct e1000_adapter *adapter;
3313         int work_to_do = min(*budget, poll_dev->quota);
3314         int tx_cleaned = 0, i = 0, work_done = 0;
3315
3316         /* Must NOT use netdev_priv macro here. */
3317         adapter = poll_dev->priv;
3318
3319         /* Keep link state information with original netdev */
3320         if (!netif_carrier_ok(adapter->netdev))
3321                 goto quit_polling;
3322
3323         while (poll_dev != &adapter->polling_netdev[i]) {
3324                 i++;
3325                 if (unlikely(i == adapter->num_rx_queues))
3326                         BUG();
3327         }
3328
3329         if (likely(adapter->num_tx_queues == 1)) {
3330                 /* e1000_clean is called per-cpu.  This lock protects
3331                  * tx_ring[0] from being cleaned by multiple cpus
3332                  * simultaneously.  A failure obtaining the lock means
3333                  * tx_ring[0] is currently being cleaned anyway. */
3334                 if (spin_trylock(&adapter->tx_queue_lock)) {
3335                         tx_cleaned = e1000_clean_tx_irq(adapter,
3336                                                         &adapter->tx_ring[0]);
3337                         spin_unlock(&adapter->tx_queue_lock);
3338                 }
3339         } else
3340                 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3341
3342         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3343                           &work_done, work_to_do);
3344
3345         *budget -= work_done;
3346         poll_dev->quota -= work_done;
3347
3348         /* If no Tx and not enough Rx work done, exit the polling mode */
3349         if ((!tx_cleaned && (work_done == 0)) ||
3350            !netif_running(adapter->netdev)) {
3351 quit_polling:
3352                 netif_rx_complete(poll_dev);
3353                 e1000_irq_enable(adapter);
3354                 return 0;
3355         }
3356
3357         return 1;
3358 }
3359
3360 #endif
3361 /**
3362  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3363  * @adapter: board private structure
3364  **/
3365
3366 static boolean_t
3367 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3368                    struct e1000_tx_ring *tx_ring)
3369 {
3370         struct net_device *netdev = adapter->netdev;
3371         struct e1000_tx_desc *tx_desc, *eop_desc;
3372         struct e1000_buffer *buffer_info;
3373         unsigned int i, eop;
3374 #ifdef CONFIG_E1000_NAPI
3375         unsigned int count = 0;
3376 #endif
3377         boolean_t cleaned = FALSE;
3378
3379         i = tx_ring->next_to_clean;
3380         eop = tx_ring->buffer_info[i].next_to_watch;
3381         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3382
3383         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3384                 for (cleaned = FALSE; !cleaned; ) {
3385                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3386                         buffer_info = &tx_ring->buffer_info[i];
3387                         cleaned = (i == eop);
3388
3389                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3390                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3391
3392                         if (unlikely(++i == tx_ring->count)) i = 0;
3393                 }
3394
3395
3396                 eop = tx_ring->buffer_info[i].next_to_watch;
3397                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3398 #ifdef CONFIG_E1000_NAPI
3399 #define E1000_TX_WEIGHT 64
3400                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3401                 if (count++ == E1000_TX_WEIGHT) break;
3402 #endif
3403         }
3404
3405         tx_ring->next_to_clean = i;
3406
3407         spin_lock(&tx_ring->tx_lock);
3408
3409         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3410                     netif_carrier_ok(netdev)))
3411                 netif_wake_queue(netdev);
3412
3413         spin_unlock(&tx_ring->tx_lock);
3414
3415         if (adapter->detect_tx_hung) {
3416                 /* Detect a transmit hang in hardware, this serializes the
3417                  * check with the clearing of time_stamp and movement of i */
3418                 adapter->detect_tx_hung = FALSE;
3419                 if (tx_ring->buffer_info[eop].dma &&
3420                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3421                                (adapter->tx_timeout_factor * HZ))
3422                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3423                          E1000_STATUS_TXOFF)) {
3424
3425                         /* detected Tx unit hang */
3426                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3427                                         "  Tx Queue             <%lu>\n"
3428                                         "  TDH                  <%x>\n"
3429                                         "  TDT                  <%x>\n"
3430                                         "  next_to_use          <%x>\n"
3431                                         "  next_to_clean        <%x>\n"
3432                                         "buffer_info[next_to_clean]\n"
3433                                         "  time_stamp           <%lx>\n"
3434                                         "  next_to_watch        <%x>\n"
3435                                         "  jiffies              <%lx>\n"
3436                                         "  next_to_watch.status <%x>\n",
3437                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3438                                         sizeof(struct e1000_tx_ring)),
3439                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3440                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3441                                 tx_ring->next_to_use,
3442                                 tx_ring->next_to_clean,
3443                                 tx_ring->buffer_info[eop].time_stamp,
3444                                 eop,
3445                                 jiffies,
3446                                 eop_desc->upper.fields.status);
3447                         netif_stop_queue(netdev);
3448                 }
3449         }
3450         return cleaned;
3451 }
3452
3453 /**
3454  * e1000_rx_checksum - Receive Checksum Offload for 82543
3455  * @adapter:     board private structure
3456  * @status_err:  receive descriptor status and error fields
3457  * @csum:        receive descriptor csum field
3458  * @sk_buff:     socket buffer with received data
3459  **/
3460
3461 static inline void
3462 e1000_rx_checksum(struct e1000_adapter *adapter,
3463                   uint32_t status_err, uint32_t csum,
3464                   struct sk_buff *skb)
3465 {
3466         uint16_t status = (uint16_t)status_err;
3467         uint8_t errors = (uint8_t)(status_err >> 24);
3468         skb->ip_summed = CHECKSUM_NONE;
3469
3470         /* 82543 or newer only */
3471         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3472         /* Ignore Checksum bit is set */
3473         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3474         /* TCP/UDP checksum error bit is set */
3475         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3476                 /* let the stack verify checksum errors */
3477                 adapter->hw_csum_err++;
3478                 return;
3479         }
3480         /* TCP/UDP Checksum has not been calculated */
3481         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3482                 if (!(status & E1000_RXD_STAT_TCPCS))
3483                         return;
3484         } else {
3485                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3486                         return;
3487         }
3488         /* It must be a TCP or UDP packet with a valid checksum */
3489         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3490                 /* TCP checksum is good */
3491                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3492         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3493                 /* IP fragment with UDP payload */
3494                 /* Hardware complements the payload checksum, so we undo it
3495                  * and then put the value in host order for further stack use.
3496                  */
3497                 csum = ntohl(csum ^ 0xFFFF);
3498                 skb->csum = csum;
3499                 skb->ip_summed = CHECKSUM_HW;
3500         }
3501         adapter->hw_csum_good++;
3502 }
3503
3504 /**
3505  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3506  * @adapter: board private structure
3507  **/
3508
3509 static boolean_t
3510 #ifdef CONFIG_E1000_NAPI
3511 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3512                    struct e1000_rx_ring *rx_ring,
3513                    int *work_done, int work_to_do)
3514 #else
3515 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3516                    struct e1000_rx_ring *rx_ring)
3517 #endif
3518 {
3519         struct net_device *netdev = adapter->netdev;
3520         struct pci_dev *pdev = adapter->pdev;
3521         struct e1000_rx_desc *rx_desc, *next_rxd;
3522         struct e1000_buffer *buffer_info, *next_buffer;
3523         unsigned long flags;
3524         uint32_t length;
3525         uint8_t last_byte;
3526         unsigned int i;
3527         int cleaned_count = 0;
3528         boolean_t cleaned = FALSE;
3529
3530         i = rx_ring->next_to_clean;
3531         rx_desc = E1000_RX_DESC(*rx_ring, i);
3532         buffer_info = &rx_ring->buffer_info[i];
3533
3534         while (rx_desc->status & E1000_RXD_STAT_DD) {
3535                 struct sk_buff *skb, *next_skb;
3536                 u8 status;
3537 #ifdef CONFIG_E1000_NAPI
3538                 if (*work_done >= work_to_do)
3539                         break;
3540                 (*work_done)++;
3541 #endif
3542                 status = rx_desc->status;
3543                 skb = buffer_info->skb;
3544                 buffer_info->skb = NULL;
3545
3546                 prefetch(skb->data - NET_IP_ALIGN);
3547
3548                 if (++i == rx_ring->count) i = 0;
3549                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3550                 prefetch(next_rxd);
3551
3552                 next_buffer = &rx_ring->buffer_info[i];
3553                 next_skb = next_buffer->skb;
3554                 prefetch(next_skb->data - NET_IP_ALIGN);
3555
3556                 cleaned = TRUE;
3557                 cleaned_count++;
3558                 pci_unmap_single(pdev,
3559                                  buffer_info->dma,
3560                                  buffer_info->length,
3561                                  PCI_DMA_FROMDEVICE);
3562
3563                 length = le16_to_cpu(rx_desc->length);
3564
3565                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3566                         /* All receives must fit into a single buffer */
3567                         E1000_DBG("%s: Receive packet consumed multiple"
3568                                   " buffers\n", netdev->name);
3569                         dev_kfree_skb_irq(skb);
3570                         goto next_desc;
3571                 }
3572
3573                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3574                         last_byte = *(skb->data + length - 1);
3575                         if (TBI_ACCEPT(&adapter->hw, status,
3576                                       rx_desc->errors, length, last_byte)) {
3577                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3578                                 e1000_tbi_adjust_stats(&adapter->hw,
3579                                                        &adapter->stats,
3580                                                        length, skb->data);
3581                                 spin_unlock_irqrestore(&adapter->stats_lock,
3582                                                        flags);
3583                                 length--;
3584                         } else {
3585                                 dev_kfree_skb_irq(skb);
3586                                 goto next_desc;
3587                         }
3588                 }
3589
3590                 /* code added for copybreak, this should improve
3591                  * performance for small packets with large amounts
3592                  * of reassembly being done in the stack */
3593 #define E1000_CB_LENGTH 256
3594                 if (length < E1000_CB_LENGTH) {
3595                         struct sk_buff *new_skb =
3596                             dev_alloc_skb(length + NET_IP_ALIGN);
3597                         if (new_skb) {
3598                                 skb_reserve(new_skb, NET_IP_ALIGN);
3599                                 new_skb->dev = netdev;
3600                                 memcpy(new_skb->data - NET_IP_ALIGN,
3601                                        skb->data - NET_IP_ALIGN,
3602                                        length + NET_IP_ALIGN);
3603                                 /* save the skb in buffer_info as good */
3604                                 buffer_info->skb = skb;
3605                                 skb = new_skb;
3606                                 skb_put(skb, length);
3607                         }
3608                 } else
3609                         skb_put(skb, length);
3610
3611                 /* end copybreak code */
3612
3613                 /* Receive Checksum Offload */
3614                 e1000_rx_checksum(adapter,
3615                                   (uint32_t)(status) |
3616                                   ((uint32_t)(rx_desc->errors) << 24),
3617                                   rx_desc->csum, skb);
3618
3619                 skb->protocol = eth_type_trans(skb, netdev);
3620 #ifdef CONFIG_E1000_NAPI
3621                 if (unlikely(adapter->vlgrp &&
3622                             (status & E1000_RXD_STAT_VP))) {
3623                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3624                                                  le16_to_cpu(rx_desc->special) &
3625                                                  E1000_RXD_SPC_VLAN_MASK);
3626                 } else {
3627                         netif_receive_skb(skb);
3628                 }
3629 #else /* CONFIG_E1000_NAPI */
3630                 if (unlikely(adapter->vlgrp &&
3631                             (status & E1000_RXD_STAT_VP))) {
3632                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3633                                         le16_to_cpu(rx_desc->special) &
3634                                         E1000_RXD_SPC_VLAN_MASK);
3635                 } else {
3636                         netif_rx(skb);
3637                 }
3638 #endif /* CONFIG_E1000_NAPI */
3639                 netdev->last_rx = jiffies;
3640
3641 next_desc:
3642                 rx_desc->status = 0;
3643
3644                 /* return some buffers to hardware, one at a time is too slow */
3645                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3646                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3647                         cleaned_count = 0;
3648                 }
3649
3650                 /* use prefetched values */
3651                 rx_desc = next_rxd;
3652                 buffer_info = next_buffer;
3653         }
3654         rx_ring->next_to_clean = i;
3655
3656         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3657         if (cleaned_count)
3658                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3659
3660         return cleaned;
3661 }
3662
3663 /**
3664  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3665  * @adapter: board private structure
3666  **/
3667
3668 static boolean_t
3669 #ifdef CONFIG_E1000_NAPI
3670 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3671                       struct e1000_rx_ring *rx_ring,
3672                       int *work_done, int work_to_do)
3673 #else
3674 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3675                       struct e1000_rx_ring *rx_ring)
3676 #endif
3677 {
3678         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3679         struct net_device *netdev = adapter->netdev;
3680         struct pci_dev *pdev = adapter->pdev;
3681         struct e1000_buffer *buffer_info, *next_buffer;
3682         struct e1000_ps_page *ps_page;
3683         struct e1000_ps_page_dma *ps_page_dma;
3684         struct sk_buff *skb, *next_skb;
3685         unsigned int i, j;
3686         uint32_t length, staterr;
3687         int cleaned_count = 0;
3688         boolean_t cleaned = FALSE;
3689
3690         i = rx_ring->next_to_clean;
3691         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3692         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3693
3694         while (staterr & E1000_RXD_STAT_DD) {
3695                 buffer_info = &rx_ring->buffer_info[i];
3696                 ps_page = &rx_ring->ps_page[i];
3697                 ps_page_dma = &rx_ring->ps_page_dma[i];
3698 #ifdef CONFIG_E1000_NAPI
3699                 if (unlikely(*work_done >= work_to_do))
3700                         break;
3701                 (*work_done)++;
3702 #endif
3703                 skb = buffer_info->skb;
3704
3705                 /* in the packet split case this is header only */
3706                 prefetch(skb->data - NET_IP_ALIGN);
3707
3708                 if (++i == rx_ring->count) i = 0;
3709                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3710                 prefetch(next_rxd);
3711
3712                 next_buffer = &rx_ring->buffer_info[i];
3713                 next_skb = next_buffer->skb;
3714                 prefetch(next_skb->data - NET_IP_ALIGN);
3715
3716                 cleaned = TRUE;
3717                 cleaned_count++;
3718                 pci_unmap_single(pdev, buffer_info->dma,
3719                                  buffer_info->length,
3720                                  PCI_DMA_FROMDEVICE);
3721
3722                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3723                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3724                                   " the full packet\n", netdev->name);
3725                         dev_kfree_skb_irq(skb);
3726                         goto next_desc;
3727                 }
3728
3729                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3730                         dev_kfree_skb_irq(skb);
3731                         goto next_desc;
3732                 }
3733
3734                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3735
3736                 if (unlikely(!length)) {
3737                         E1000_DBG("%s: Last part of the packet spanning"
3738                                   " multiple descriptors\n", netdev->name);
3739                         dev_kfree_skb_irq(skb);
3740                         goto next_desc;
3741                 }
3742
3743                 /* Good Receive */
3744                 skb_put(skb, length);
3745
3746                 {
3747                 /* this looks ugly, but it seems compiler issues make it
3748                    more efficient than reusing j */
3749                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3750
3751                 /* page alloc/put takes too long and effects small packet
3752                  * throughput, so unsplit small packets and save the alloc/put*/
3753                 if (l1 && ((length + l1) < E1000_CB_LENGTH)) {
3754                         u8 *vaddr;
3755                         /* there is no documentation about how to call
3756                          * kmap_atomic, so we can't hold the mapping
3757                          * very long */
3758                         pci_dma_sync_single_for_cpu(pdev,
3759                                 ps_page_dma->ps_page_dma[0],
3760                                 PAGE_SIZE,
3761                                 PCI_DMA_FROMDEVICE);
3762                         vaddr = kmap_atomic(ps_page->ps_page[0],
3763                                             KM_SKB_DATA_SOFTIRQ);
3764                         memcpy(skb->tail, vaddr, l1);
3765                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3766                         pci_dma_sync_single_for_device(pdev,
3767                                 ps_page_dma->ps_page_dma[0],
3768                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3769                         skb_put(skb, l1);
3770                         length += l1;
3771                         goto copydone;
3772                 } /* if */
3773                 }
3774
3775                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3776                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
3777                                 break;
3778                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3779                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3780                         ps_page_dma->ps_page_dma[j] = 0;
3781                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3782                                            length);
3783                         ps_page->ps_page[j] = NULL;
3784                         skb->len += length;
3785                         skb->data_len += length;
3786                 }
3787
3788 copydone:
3789                 e1000_rx_checksum(adapter, staterr,
3790                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3791                 skb->protocol = eth_type_trans(skb, netdev);
3792
3793                 if (likely(rx_desc->wb.upper.header_status &
3794                           E1000_RXDPS_HDRSTAT_HDRSP))
3795                         adapter->rx_hdr_split++;
3796 #ifdef CONFIG_E1000_NAPI
3797                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3798                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3799                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3800                                 E1000_RXD_SPC_VLAN_MASK);
3801                 } else {
3802                         netif_receive_skb(skb);
3803                 }
3804 #else /* CONFIG_E1000_NAPI */
3805                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3806                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3807                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3808                                 E1000_RXD_SPC_VLAN_MASK);
3809                 } else {
3810                         netif_rx(skb);
3811                 }
3812 #endif /* CONFIG_E1000_NAPI */
3813                 netdev->last_rx = jiffies;
3814
3815 next_desc:
3816                 rx_desc->wb.middle.status_error &= ~0xFF;
3817                 buffer_info->skb = NULL;
3818
3819                 /* return some buffers to hardware, one at a time is too slow */
3820                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3821                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3822                         cleaned_count = 0;
3823                 }
3824
3825                 /* use prefetched values */
3826                 rx_desc = next_rxd;
3827                 buffer_info = next_buffer;
3828
3829                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3830         }
3831         rx_ring->next_to_clean = i;
3832
3833         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3834         if (cleaned_count)
3835                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3836
3837         return cleaned;
3838 }
3839
3840 /**
3841  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3842  * @adapter: address of board private structure
3843  **/
3844
3845 static void
3846 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3847                        struct e1000_rx_ring *rx_ring,
3848                        int cleaned_count)
3849 {
3850         struct net_device *netdev = adapter->netdev;
3851         struct pci_dev *pdev = adapter->pdev;
3852         struct e1000_rx_desc *rx_desc;
3853         struct e1000_buffer *buffer_info;
3854         struct sk_buff *skb;
3855         unsigned int i;
3856         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3857
3858         i = rx_ring->next_to_use;
3859         buffer_info = &rx_ring->buffer_info[i];
3860
3861         while (cleaned_count--) {
3862                 if (!(skb = buffer_info->skb))
3863                         skb = dev_alloc_skb(bufsz);
3864                 else {
3865                         skb_trim(skb, 0);
3866                         goto map_skb;
3867                 }
3868
3869                 if (unlikely(!skb)) {
3870                         /* Better luck next round */
3871                         adapter->alloc_rx_buff_failed++;
3872                         break;
3873                 }
3874
3875                 /* Fix for errata 23, can't cross 64kB boundary */
3876                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3877                         struct sk_buff *oldskb = skb;
3878                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3879                                              "at %p\n", bufsz, skb->data);
3880                         /* Try again, without freeing the previous */
3881                         skb = dev_alloc_skb(bufsz);
3882                         /* Failed allocation, critical failure */
3883                         if (!skb) {
3884                                 dev_kfree_skb(oldskb);
3885                                 break;
3886                         }
3887
3888                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3889                                 /* give up */
3890                                 dev_kfree_skb(skb);
3891                                 dev_kfree_skb(oldskb);
3892                                 break; /* while !buffer_info->skb */
3893                         } else {
3894                                 /* Use new allocation */
3895                                 dev_kfree_skb(oldskb);
3896                         }
3897                 }
3898                 /* Make buffer alignment 2 beyond a 16 byte boundary
3899                  * this will result in a 16 byte aligned IP header after
3900                  * the 14 byte MAC header is removed
3901                  */
3902                 skb_reserve(skb, NET_IP_ALIGN);
3903
3904                 skb->dev = netdev;
3905
3906                 buffer_info->skb = skb;
3907                 buffer_info->length = adapter->rx_buffer_len;
3908 map_skb:
3909                 buffer_info->dma = pci_map_single(pdev,
3910                                                   skb->data,
3911                                                   adapter->rx_buffer_len,
3912                                                   PCI_DMA_FROMDEVICE);
3913
3914                 /* Fix for errata 23, can't cross 64kB boundary */
3915                 if (!e1000_check_64k_bound(adapter,
3916                                         (void *)(unsigned long)buffer_info->dma,
3917                                         adapter->rx_buffer_len)) {
3918                         DPRINTK(RX_ERR, ERR,
3919                                 "dma align check failed: %u bytes at %p\n",
3920                                 adapter->rx_buffer_len,
3921                                 (void *)(unsigned long)buffer_info->dma);
3922                         dev_kfree_skb(skb);
3923                         buffer_info->skb = NULL;
3924
3925                         pci_unmap_single(pdev, buffer_info->dma,
3926                                          adapter->rx_buffer_len,
3927                                          PCI_DMA_FROMDEVICE);
3928
3929                         break; /* while !buffer_info->skb */
3930                 }
3931                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3932                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3933
3934                 if (unlikely(++i == rx_ring->count))
3935                         i = 0;
3936                 buffer_info = &rx_ring->buffer_info[i];
3937         }
3938
3939         if (likely(rx_ring->next_to_use != i)) {
3940                 rx_ring->next_to_use = i;
3941                 if (unlikely(i-- == 0))
3942                         i = (rx_ring->count - 1);
3943
3944                 /* Force memory writes to complete before letting h/w
3945                  * know there are new descriptors to fetch.  (Only
3946                  * applicable for weak-ordered memory model archs,
3947                  * such as IA-64). */
3948                 wmb();
3949                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3950         }
3951 }
3952
3953 /**
3954  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3955  * @adapter: address of board private structure
3956  **/
3957
3958 static void
3959 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3960                           struct e1000_rx_ring *rx_ring,
3961                           int cleaned_count)
3962 {
3963         struct net_device *netdev = adapter->netdev;
3964         struct pci_dev *pdev = adapter->pdev;
3965         union e1000_rx_desc_packet_split *rx_desc;
3966         struct e1000_buffer *buffer_info;
3967         struct e1000_ps_page *ps_page;
3968         struct e1000_ps_page_dma *ps_page_dma;
3969         struct sk_buff *skb;
3970         unsigned int i, j;
3971
3972         i = rx_ring->next_to_use;
3973         buffer_info = &rx_ring->buffer_info[i];
3974         ps_page = &rx_ring->ps_page[i];
3975         ps_page_dma = &rx_ring->ps_page_dma[i];
3976
3977         while (cleaned_count--) {
3978                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3979
3980                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
3981                         if (j < adapter->rx_ps_pages) {
3982                                 if (likely(!ps_page->ps_page[j])) {
3983                                         ps_page->ps_page[j] =
3984                                                 alloc_page(GFP_ATOMIC);
3985                                         if (unlikely(!ps_page->ps_page[j])) {
3986                                                 adapter->alloc_rx_buff_failed++;
3987                                                 goto no_buffers;
3988                                         }
3989                                         ps_page_dma->ps_page_dma[j] =
3990                                                 pci_map_page(pdev,
3991                                                             ps_page->ps_page[j],
3992                                                             0, PAGE_SIZE,
3993                                                             PCI_DMA_FROMDEVICE);
3994                                 }
3995                                 /* Refresh the desc even if buffer_addrs didn't
3996                                  * change because each write-back erases
3997                                  * this info.
3998                                  */
3999                                 rx_desc->read.buffer_addr[j+1] =
4000                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4001                         } else
4002                                 rx_desc->read.buffer_addr[j+1] = ~0;
4003                 }
4004
4005                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4006
4007                 if (unlikely(!skb)) {
4008                         adapter->alloc_rx_buff_failed++;
4009                         break;
4010                 }
4011
4012                 /* Make buffer alignment 2 beyond a 16 byte boundary
4013                  * this will result in a 16 byte aligned IP header after
4014                  * the 14 byte MAC header is removed
4015                  */
4016                 skb_reserve(skb, NET_IP_ALIGN);
4017
4018                 skb->dev = netdev;
4019
4020                 buffer_info->skb = skb;
4021                 buffer_info->length = adapter->rx_ps_bsize0;
4022                 buffer_info->dma = pci_map_single(pdev, skb->data,
4023                                                   adapter->rx_ps_bsize0,
4024                                                   PCI_DMA_FROMDEVICE);
4025
4026                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4027
4028                 if (unlikely(++i == rx_ring->count)) i = 0;
4029                 buffer_info = &rx_ring->buffer_info[i];
4030                 ps_page = &rx_ring->ps_page[i];
4031                 ps_page_dma = &rx_ring->ps_page_dma[i];
4032         }
4033
4034 no_buffers:
4035         if (likely(rx_ring->next_to_use != i)) {
4036                 rx_ring->next_to_use = i;
4037                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4038
4039                 /* Force memory writes to complete before letting h/w
4040                  * know there are new descriptors to fetch.  (Only
4041                  * applicable for weak-ordered memory model archs,
4042                  * such as IA-64). */
4043                 wmb();
4044                 /* Hardware increments by 16 bytes, but packet split
4045                  * descriptors are 32 bytes...so we increment tail
4046                  * twice as much.
4047                  */
4048                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4049         }
4050 }
4051
4052 /**
4053  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4054  * @adapter:
4055  **/
4056
4057 static void
4058 e1000_smartspeed(struct e1000_adapter *adapter)
4059 {
4060         uint16_t phy_status;
4061         uint16_t phy_ctrl;
4062
4063         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4064            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4065                 return;
4066
4067         if (adapter->smartspeed == 0) {
4068                 /* If Master/Slave config fault is asserted twice,
4069                  * we assume back-to-back */
4070                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4071                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4072                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4073                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4074                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4075                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4076                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4077                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4078                                             phy_ctrl);
4079                         adapter->smartspeed++;
4080                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4081                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4082                                                &phy_ctrl)) {
4083                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4084                                              MII_CR_RESTART_AUTO_NEG);
4085                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4086                                                     phy_ctrl);
4087                         }
4088                 }
4089                 return;
4090         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4091                 /* If still no link, perhaps using 2/3 pair cable */
4092                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4093                 phy_ctrl |= CR_1000T_MS_ENABLE;
4094                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4095                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4096                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4097                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4098                                      MII_CR_RESTART_AUTO_NEG);
4099                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4100                 }
4101         }
4102         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4103         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4104                 adapter->smartspeed = 0;
4105 }
4106
4107 /**
4108  * e1000_ioctl -
4109  * @netdev:
4110  * @ifreq:
4111  * @cmd:
4112  **/
4113
4114 static int
4115 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4116 {
4117         switch (cmd) {
4118         case SIOCGMIIPHY:
4119         case SIOCGMIIREG:
4120         case SIOCSMIIREG:
4121                 return e1000_mii_ioctl(netdev, ifr, cmd);
4122         default:
4123                 return -EOPNOTSUPP;
4124         }
4125 }
4126
4127 /**
4128  * e1000_mii_ioctl -
4129  * @netdev:
4130  * @ifreq:
4131  * @cmd:
4132  **/
4133
4134 static int
4135 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4136 {
4137         struct e1000_adapter *adapter = netdev_priv(netdev);
4138         struct mii_ioctl_data *data = if_mii(ifr);
4139         int retval;
4140         uint16_t mii_reg;
4141         uint16_t spddplx;
4142         unsigned long flags;
4143
4144         if (adapter->hw.media_type != e1000_media_type_copper)
4145                 return -EOPNOTSUPP;
4146
4147         switch (cmd) {
4148         case SIOCGMIIPHY:
4149                 data->phy_id = adapter->hw.phy_addr;
4150                 break;
4151         case SIOCGMIIREG:
4152                 if (!capable(CAP_NET_ADMIN))
4153                         return -EPERM;
4154                 spin_lock_irqsave(&adapter->stats_lock, flags);
4155                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4156                                    &data->val_out)) {
4157                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4158                         return -EIO;
4159                 }
4160                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4161                 break;
4162         case SIOCSMIIREG:
4163                 if (!capable(CAP_NET_ADMIN))
4164                         return -EPERM;
4165                 if (data->reg_num & ~(0x1F))
4166                         return -EFAULT;
4167                 mii_reg = data->val_in;
4168                 spin_lock_irqsave(&adapter->stats_lock, flags);
4169                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4170                                         mii_reg)) {
4171                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4172                         return -EIO;
4173                 }
4174                 if (adapter->hw.phy_type == e1000_phy_m88) {
4175                         switch (data->reg_num) {
4176                         case PHY_CTRL:
4177                                 if (mii_reg & MII_CR_POWER_DOWN)
4178                                         break;
4179                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4180                                         adapter->hw.autoneg = 1;
4181                                         adapter->hw.autoneg_advertised = 0x2F;
4182                                 } else {
4183                                         if (mii_reg & 0x40)
4184                                                 spddplx = SPEED_1000;
4185                                         else if (mii_reg & 0x2000)
4186                                                 spddplx = SPEED_100;
4187                                         else
4188                                                 spddplx = SPEED_10;
4189                                         spddplx += (mii_reg & 0x100)
4190                                                    ? FULL_DUPLEX :
4191                                                    HALF_DUPLEX;
4192                                         retval = e1000_set_spd_dplx(adapter,
4193                                                                     spddplx);
4194                                         if (retval) {
4195                                                 spin_unlock_irqrestore(
4196                                                         &adapter->stats_lock,
4197                                                         flags);
4198                                                 return retval;
4199                                         }
4200                                 }
4201                                 if (netif_running(adapter->netdev)) {
4202                                         e1000_down(adapter);
4203                                         e1000_up(adapter);
4204                                 } else
4205                                         e1000_reset(adapter);
4206                                 break;
4207                         case M88E1000_PHY_SPEC_CTRL:
4208                         case M88E1000_EXT_PHY_SPEC_CTRL:
4209                                 if (e1000_phy_reset(&adapter->hw)) {
4210                                         spin_unlock_irqrestore(
4211                                                 &adapter->stats_lock, flags);
4212                                         return -EIO;
4213                                 }
4214                                 break;
4215                         }
4216                 } else {
4217                         switch (data->reg_num) {
4218                         case PHY_CTRL:
4219                                 if (mii_reg & MII_CR_POWER_DOWN)
4220                                         break;
4221                                 if (netif_running(adapter->netdev)) {
4222                                         e1000_down(adapter);
4223                                         e1000_up(adapter);
4224                                 } else
4225                                         e1000_reset(adapter);
4226                                 break;
4227                         }
4228                 }
4229                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4230                 break;
4231         default:
4232                 return -EOPNOTSUPP;
4233         }
4234         return E1000_SUCCESS;
4235 }
4236
4237 void
4238 e1000_pci_set_mwi(struct e1000_hw *hw)
4239 {
4240         struct e1000_adapter *adapter = hw->back;
4241         int ret_val = pci_set_mwi(adapter->pdev);
4242
4243         if (ret_val)
4244                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4245 }
4246
4247 void
4248 e1000_pci_clear_mwi(struct e1000_hw *hw)
4249 {
4250         struct e1000_adapter *adapter = hw->back;
4251
4252         pci_clear_mwi(adapter->pdev);
4253 }
4254
4255 void
4256 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4257 {
4258         struct e1000_adapter *adapter = hw->back;
4259
4260         pci_read_config_word(adapter->pdev, reg, value);
4261 }
4262
4263 void
4264 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4265 {
4266         struct e1000_adapter *adapter = hw->back;
4267
4268         pci_write_config_word(adapter->pdev, reg, *value);
4269 }
4270
4271 uint32_t
4272 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4273 {
4274         return inl(port);
4275 }
4276
4277 void
4278 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4279 {
4280         outl(value, port);
4281 }
4282
4283 static void
4284 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4285 {
4286         struct e1000_adapter *adapter = netdev_priv(netdev);
4287         uint32_t ctrl, rctl;
4288
4289         e1000_irq_disable(adapter);
4290         adapter->vlgrp = grp;
4291
4292         if (grp) {
4293                 /* enable VLAN tag insert/strip */
4294                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4295                 ctrl |= E1000_CTRL_VME;
4296                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4297
4298                 /* enable VLAN receive filtering */
4299                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4300                 rctl |= E1000_RCTL_VFE;
4301                 rctl &= ~E1000_RCTL_CFIEN;
4302                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4303                 e1000_update_mng_vlan(adapter);
4304         } else {
4305                 /* disable VLAN tag insert/strip */
4306                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4307                 ctrl &= ~E1000_CTRL_VME;
4308                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4309
4310                 /* disable VLAN filtering */
4311                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4312                 rctl &= ~E1000_RCTL_VFE;
4313                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4314                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4315                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4316                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4317                 }
4318         }
4319
4320         e1000_irq_enable(adapter);
4321 }
4322
4323 static void
4324 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4325 {
4326         struct e1000_adapter *adapter = netdev_priv(netdev);
4327         uint32_t vfta, index;
4328
4329         if ((adapter->hw.mng_cookie.status &
4330              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4331             (vid == adapter->mng_vlan_id))
4332                 return;
4333         /* add VID to filter table */
4334         index = (vid >> 5) & 0x7F;
4335         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4336         vfta |= (1 << (vid & 0x1F));
4337         e1000_write_vfta(&adapter->hw, index, vfta);
4338 }
4339
4340 static void
4341 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4342 {
4343         struct e1000_adapter *adapter = netdev_priv(netdev);
4344         uint32_t vfta, index;
4345
4346         e1000_irq_disable(adapter);
4347
4348         if (adapter->vlgrp)
4349                 adapter->vlgrp->vlan_devices[vid] = NULL;
4350
4351         e1000_irq_enable(adapter);
4352
4353         if ((adapter->hw.mng_cookie.status &
4354              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4355             (vid == adapter->mng_vlan_id)) {
4356                 /* release control to f/w */
4357                 e1000_release_hw_control(adapter);
4358                 return;
4359         }
4360
4361         /* remove VID from filter table */
4362         index = (vid >> 5) & 0x7F;
4363         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4364         vfta &= ~(1 << (vid & 0x1F));
4365         e1000_write_vfta(&adapter->hw, index, vfta);
4366 }
4367
4368 static void
4369 e1000_restore_vlan(struct e1000_adapter *adapter)
4370 {
4371         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4372
4373         if (adapter->vlgrp) {
4374                 uint16_t vid;
4375                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4376                         if (!adapter->vlgrp->vlan_devices[vid])
4377                                 continue;
4378                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4379                 }
4380         }
4381 }
4382
4383 int
4384 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4385 {
4386         adapter->hw.autoneg = 0;
4387
4388         /* Fiber NICs only allow 1000 gbps Full duplex */
4389         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4390                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4391                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4392                 return -EINVAL;
4393         }
4394
4395         switch (spddplx) {
4396         case SPEED_10 + DUPLEX_HALF:
4397                 adapter->hw.forced_speed_duplex = e1000_10_half;
4398                 break;
4399         case SPEED_10 + DUPLEX_FULL:
4400                 adapter->hw.forced_speed_duplex = e1000_10_full;
4401                 break;
4402         case SPEED_100 + DUPLEX_HALF:
4403                 adapter->hw.forced_speed_duplex = e1000_100_half;
4404                 break;
4405         case SPEED_100 + DUPLEX_FULL:
4406                 adapter->hw.forced_speed_duplex = e1000_100_full;
4407                 break;
4408         case SPEED_1000 + DUPLEX_FULL:
4409                 adapter->hw.autoneg = 1;
4410                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4411                 break;
4412         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4413         default:
4414                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4415                 return -EINVAL;
4416         }
4417         return 0;
4418 }
4419
4420 #ifdef CONFIG_PM
4421 /* Save/restore 16 or 64 dwords of PCI config space depending on which
4422  * bus we're on (PCI(X) vs. PCI-E)
4423  */
4424 #define PCIE_CONFIG_SPACE_LEN 256
4425 #define PCI_CONFIG_SPACE_LEN 64
4426 static int
4427 e1000_pci_save_state(struct e1000_adapter *adapter)
4428 {
4429         struct pci_dev *dev = adapter->pdev;
4430         int size;
4431         int i;
4432
4433         if (adapter->hw.mac_type >= e1000_82571)
4434                 size = PCIE_CONFIG_SPACE_LEN;
4435         else
4436                 size = PCI_CONFIG_SPACE_LEN;
4437
4438         WARN_ON(adapter->config_space != NULL);
4439
4440         adapter->config_space = kmalloc(size, GFP_KERNEL);
4441         if (!adapter->config_space) {
4442                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4443                 return -ENOMEM;
4444         }
4445         for (i = 0; i < (size / 4); i++)
4446                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4447         return 0;
4448 }
4449
4450 static void
4451 e1000_pci_restore_state(struct e1000_adapter *adapter)
4452 {
4453         struct pci_dev *dev = adapter->pdev;
4454         int size;
4455         int i;
4456
4457         if (adapter->config_space == NULL)
4458                 return;
4459
4460         if (adapter->hw.mac_type >= e1000_82571)
4461                 size = PCIE_CONFIG_SPACE_LEN;
4462         else
4463                 size = PCI_CONFIG_SPACE_LEN;
4464         for (i = 0; i < (size / 4); i++)
4465                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4466         kfree(adapter->config_space);
4467         adapter->config_space = NULL;
4468         return;
4469 }
4470 #endif /* CONFIG_PM */
4471
4472 static int
4473 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4474 {
4475         struct net_device *netdev = pci_get_drvdata(pdev);
4476         struct e1000_adapter *adapter = netdev_priv(netdev);
4477         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4478         uint32_t wufc = adapter->wol;
4479         int retval = 0;
4480
4481         netif_device_detach(netdev);
4482
4483         if (netif_running(netdev))
4484                 e1000_down(adapter);
4485
4486 #ifdef CONFIG_PM
4487         /* Implement our own version of pci_save_state(pdev) because pci-
4488          * express adapters have 256-byte config spaces. */
4489         retval = e1000_pci_save_state(adapter);
4490         if (retval)
4491                 return retval;
4492 #endif
4493
4494         status = E1000_READ_REG(&adapter->hw, STATUS);
4495         if (status & E1000_STATUS_LU)
4496                 wufc &= ~E1000_WUFC_LNKC;
4497
4498         if (wufc) {
4499                 e1000_setup_rctl(adapter);
4500                 e1000_set_multi(netdev);
4501
4502                 /* turn on all-multi mode if wake on multicast is enabled */
4503                 if (adapter->wol & E1000_WUFC_MC) {
4504                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4505                         rctl |= E1000_RCTL_MPE;
4506                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4507                 }
4508
4509                 if (adapter->hw.mac_type >= e1000_82540) {
4510                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4511                         /* advertise wake from D3Cold */
4512                         #define E1000_CTRL_ADVD3WUC 0x00100000
4513                         /* phy power management enable */
4514                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4515                         ctrl |= E1000_CTRL_ADVD3WUC |
4516                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4517                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4518                 }
4519
4520                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4521                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4522                         /* keep the laser running in D3 */
4523                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4524                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4525                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4526                 }
4527
4528                 /* Allow time for pending master requests to run */
4529                 e1000_disable_pciex_master(&adapter->hw);
4530
4531                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4532                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4533                 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4534                 if (retval)
4535                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4536                 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4537                 if (retval)
4538                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4539         } else {
4540                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4541                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4542                 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4543                 if (retval)
4544                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4545                 retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4546                 if (retval)
4547                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4548         }
4549
4550         if (adapter->hw.mac_type >= e1000_82540 &&
4551            adapter->hw.media_type == e1000_media_type_copper) {
4552                 manc = E1000_READ_REG(&adapter->hw, MANC);
4553                 if (manc & E1000_MANC_SMBUS_EN) {
4554                         manc |= E1000_MANC_ARP_EN;
4555                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4556                         retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4557                         if (retval)
4558                                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4559                         retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4560                         if (retval)
4561                                 DPRINTK(PROBE, ERR,
4562                                         "Error enabling D3 cold wake\n");
4563                 }
4564         }
4565
4566         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4567          * would have already happened in close and is redundant. */
4568         e1000_release_hw_control(adapter);
4569
4570         pci_disable_device(pdev);
4571
4572         retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4573         if (retval)
4574                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4575
4576         return 0;
4577 }
4578
4579 #ifdef CONFIG_PM
4580 static int
4581 e1000_resume(struct pci_dev *pdev)
4582 {
4583         struct net_device *netdev = pci_get_drvdata(pdev);
4584         struct e1000_adapter *adapter = netdev_priv(netdev);
4585         int retval;
4586         uint32_t manc, ret_val;
4587
4588         retval = pci_set_power_state(pdev, PCI_D0);
4589         if (retval)
4590                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4591         e1000_pci_restore_state(adapter);
4592         ret_val = pci_enable_device(pdev);
4593         pci_set_master(pdev);
4594
4595         retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4596         if (retval)
4597                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4598         retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4599         if (retval)
4600                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4601
4602         e1000_reset(adapter);
4603         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4604
4605         if (netif_running(netdev))
4606                 e1000_up(adapter);
4607
4608         netif_device_attach(netdev);
4609
4610         if (adapter->hw.mac_type >= e1000_82540 &&
4611            adapter->hw.media_type == e1000_media_type_copper) {
4612                 manc = E1000_READ_REG(&adapter->hw, MANC);
4613                 manc &= ~(E1000_MANC_ARP_EN);
4614                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4615         }
4616
4617         /* If the controller is 82573 and f/w is AMT, do not set
4618          * DRV_LOAD until the interface is up.  For all other cases,
4619          * let the f/w know that the h/w is now under the control
4620          * of the driver. */
4621         if (adapter->hw.mac_type != e1000_82573 ||
4622             !e1000_check_mng_mode(&adapter->hw))
4623                 e1000_get_hw_control(adapter);
4624
4625         return 0;
4626 }
4627 #endif
4628 #ifdef CONFIG_NET_POLL_CONTROLLER
4629 /*
4630  * Polling 'interrupt' - used by things like netconsole to send skbs
4631  * without having to re-enable interrupts. It's not called while
4632  * the interrupt routine is executing.
4633  */
4634 static void
4635 e1000_netpoll(struct net_device *netdev)
4636 {
4637         struct e1000_adapter *adapter = netdev_priv(netdev);
4638         disable_irq(adapter->pdev->irq);
4639         e1000_intr(adapter->pdev->irq, netdev, NULL);
4640         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4641 #ifndef CONFIG_E1000_NAPI
4642         adapter->clean_rx(adapter, adapter->rx_ring);
4643 #endif
4644         enable_irq(adapter->pdev->irq);
4645 }
4646 #endif
4647
4648 /* e1000_main.c */