git.oblomov.eu Git - linux-2.6/blob - drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30 #include <net/ip6_checksum.h>
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #define DRV_VERSION "7.3.20-k3-NAPI"
  35 const char e1000_driver_version[] = DRV_VERSION;
  36 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  37
  38 /* e1000_pci_tbl - PCI Device ID Table
  39  *
  40  * Last entry must be all 0s
  41  *
  42  * Macro expands to...
  43  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  44  */
  45 static struct pci_device_id e1000_pci_tbl[] = {
  46         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  47         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  48         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  49         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  50         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  51         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  52         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  53         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  54         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  55         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  56         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  57         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  58         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  65         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  66         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  67         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  76         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  77         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  78         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  79         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1099),
  81         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
  82         /* required last entry */
  83         {0,}
  84 };
  85
  86 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
  87
  88 int e1000_up(struct e1000_adapter *adapter);
  89 void e1000_down(struct e1000_adapter *adapter);
  90 void e1000_reinit_locked(struct e1000_adapter *adapter);
  91 void e1000_reset(struct e1000_adapter *adapter);
  92 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);
  93 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
  94 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
  95 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
  96 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
  97 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
  98                              struct e1000_tx_ring *txdr);
  99 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 100                              struct e1000_rx_ring *rxdr);
 101 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 102                              struct e1000_tx_ring *tx_ring);
 103 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 104                              struct e1000_rx_ring *rx_ring);
 105 void e1000_update_stats(struct e1000_adapter *adapter);
 106
 107 static int e1000_init_module(void);
 108 static void e1000_exit_module(void);
 109 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 110 static void __devexit e1000_remove(struct pci_dev *pdev);
 111 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 112 static int e1000_sw_init(struct e1000_adapter *adapter);
 113 static int e1000_open(struct net_device *netdev);
 114 static int e1000_close(struct net_device *netdev);
 115 static void e1000_configure_tx(struct e1000_adapter *adapter);
 116 static void e1000_configure_rx(struct e1000_adapter *adapter);
 117 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 118 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 119 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 120 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 121                                 struct e1000_tx_ring *tx_ring);
 122 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 123                                 struct e1000_rx_ring *rx_ring);
 124 static void e1000_set_rx_mode(struct net_device *netdev);
 125 static void e1000_update_phy_info(unsigned long data);
 126 static void e1000_watchdog(unsigned long data);
 127 static void e1000_82547_tx_fifo_stall(unsigned long data);
 128 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 129 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 130 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 131 static int e1000_set_mac(struct net_device *netdev, void *p);
 132 static irqreturn_t e1000_intr(int irq, void *data);
 133 static irqreturn_t e1000_intr_msi(int irq, void *data);
 134 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
 135                                struct e1000_tx_ring *tx_ring);
 136 static int e1000_clean(struct napi_struct *napi, int budget);
 137 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 138                                struct e1000_rx_ring *rx_ring,
 139                                int *work_done, int work_to_do);
 140 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 141                                    struct e1000_rx_ring *rx_ring,
 142                                    int cleaned_count);
 143 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 144 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 145                            int cmd);
 146 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 147 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 148 static void e1000_tx_timeout(struct net_device *dev);
 149 static void e1000_reset_task(struct work_struct *work);
 150 static void e1000_smartspeed(struct e1000_adapter *adapter);
 151 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 152                                        struct sk_buff *skb);
 153
 154 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 155 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
 156 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
 157 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 158
 159 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 160 #ifdef CONFIG_PM
 161 static int e1000_resume(struct pci_dev *pdev);
 162 #endif
 163 static void e1000_shutdown(struct pci_dev *pdev);
 164
 165 #ifdef CONFIG_NET_POLL_CONTROLLER
 166 /* for netdump / net console */
 167 static void e1000_netpoll (struct net_device *netdev);
 168 #endif
 169
 170 #define COPYBREAK_DEFAULT 256
 171 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
 172 module_param(copybreak, uint, 0644);
 173 MODULE_PARM_DESC(copybreak,
 174         "Maximum size of packet that is copied to a new buffer on receive");
 175
 176 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 177                      pci_channel_state_t state);
 178 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 179 static void e1000_io_resume(struct pci_dev *pdev);
 180
 181 static struct pci_error_handlers e1000_err_handler = {
 182         .error_detected = e1000_io_error_detected,
 183         .slot_reset = e1000_io_slot_reset,
 184         .resume = e1000_io_resume,
 185 };
 186
 187 static struct pci_driver e1000_driver = {
 188         .name     = e1000_driver_name,
 189         .id_table = e1000_pci_tbl,
 190         .probe    = e1000_probe,
 191         .remove   = __devexit_p(e1000_remove),
 192 #ifdef CONFIG_PM
 193         /* Power Managment Hooks */
 194         .suspend  = e1000_suspend,
 195         .resume   = e1000_resume,
 196 #endif
 197         .shutdown = e1000_shutdown,
 198         .err_handler = &e1000_err_handler
 199 };
 200
 201 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 202 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 203 MODULE_LICENSE("GPL");
 204 MODULE_VERSION(DRV_VERSION);
 205
 206 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 207 module_param(debug, int, 0);
 208 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 209
 210 /**
 211  * e1000_init_module - Driver Registration Routine
 212  *
 213  * e1000_init_module is the first routine called when the driver is
 214  * loaded. All it does is register with the PCI subsystem.
 215  **/
 216
 217 static int __init e1000_init_module(void)
 218 {
 219         int ret;
 220         printk(KERN_INFO "%s - version %s\n",
 221                e1000_driver_string, e1000_driver_version);
 222
 223         printk(KERN_INFO "%s\n", e1000_copyright);
 224
 225         ret = pci_register_driver(&e1000_driver);
 226         if (copybreak != COPYBREAK_DEFAULT) {
 227                 if (copybreak == 0)
 228                         printk(KERN_INFO "e1000: copybreak disabled\n");
 229                 else
 230                         printk(KERN_INFO "e1000: copybreak enabled for "
 231                                "packets <= %u bytes\n", copybreak);
 232         }
 233         return ret;
 234 }
 235
 236 module_init(e1000_init_module);
 237
 238 /**
 239  * e1000_exit_module - Driver Exit Cleanup Routine
 240  *
 241  * e1000_exit_module is called just before the driver is removed
 242  * from memory.
 243  **/
 244
 245 static void __exit e1000_exit_module(void)
 246 {
 247         pci_unregister_driver(&e1000_driver);
 248 }
 249
 250 module_exit(e1000_exit_module);
 251
 252 static int e1000_request_irq(struct e1000_adapter *adapter)
 253 {
 254         struct e1000_hw *hw = &adapter->hw;
 255         struct net_device *netdev = adapter->netdev;
 256         irq_handler_t handler = e1000_intr;
 257         int irq_flags = IRQF_SHARED;
 258         int err;
 259
 260         if (hw->mac_type >= e1000_82571) {
 261                 adapter->have_msi = !pci_enable_msi(adapter->pdev);
 262                 if (adapter->have_msi) {
 263                         handler = e1000_intr_msi;
 264                         irq_flags = 0;
 265                 }
 266         }
 267
 268         err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
 269                           netdev);
 270         if (err) {
 271                 if (adapter->have_msi)
 272                         pci_disable_msi(adapter->pdev);
 273                 DPRINTK(PROBE, ERR,
 274                         "Unable to allocate interrupt Error: %d\n", err);
 275         }
 276
 277         return err;
 278 }
 279
 280 static void e1000_free_irq(struct e1000_adapter *adapter)
 281 {
 282         struct net_device *netdev = adapter->netdev;
 283
 284         free_irq(adapter->pdev->irq, netdev);
 285
 286         if (adapter->have_msi)
 287                 pci_disable_msi(adapter->pdev);
 288 }
 289
 290 /**
 291  * e1000_irq_disable - Mask off interrupt generation on the NIC
 292  * @adapter: board private structure
 293  **/
 294
 295 static void e1000_irq_disable(struct e1000_adapter *adapter)
 296 {
 297         struct e1000_hw *hw = &adapter->hw;
 298
 299         ew32(IMC, ~0);
 300         E1000_WRITE_FLUSH();
 301         synchronize_irq(adapter->pdev->irq);
 302 }
 303
 304 /**
 305  * e1000_irq_enable - Enable default interrupt generation settings
 306  * @adapter: board private structure
 307  **/
 308
 309 static void e1000_irq_enable(struct e1000_adapter *adapter)
 310 {
 311         struct e1000_hw *hw = &adapter->hw;
 312
 313         ew32(IMS, IMS_ENABLE_MASK);
 314         E1000_WRITE_FLUSH();
 315 }
 316
 317 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
 318 {
 319         struct e1000_hw *hw = &adapter->hw;
 320         struct net_device *netdev = adapter->netdev;
 321         u16 vid = hw->mng_cookie.vlan_id;
 322         u16 old_vid = adapter->mng_vlan_id;
 323         if (adapter->vlgrp) {
 324                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 325                         if (hw->mng_cookie.status &
 326                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 327                                 e1000_vlan_rx_add_vid(netdev, vid);
 328                                 adapter->mng_vlan_id = vid;
 329                         } else
 330                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 331
 332                         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
 333                                         (vid != old_vid) &&
 334                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 335                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 336                 } else
 337                         adapter->mng_vlan_id = vid;
 338         }
 339 }
 340
 341 /**
 342  * e1000_release_hw_control - release control of the h/w to f/w
 343  * @adapter: address of board private structure
 344  *
 345  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 346  * For ASF and Pass Through versions of f/w this means that the
 347  * driver is no longer loaded. For AMT version (only with 82573) i
 348  * of the f/w this means that the network i/f is closed.
 349  *
 350  **/
 351
 352 static void e1000_release_hw_control(struct e1000_adapter *adapter)
 353 {
 354         u32 ctrl_ext;
 355         u32 swsm;
 356         struct e1000_hw *hw = &adapter->hw;
 357
 358         /* Let firmware taken over control of h/w */
 359         switch (hw->mac_type) {
 360         case e1000_82573:
 361                 swsm = er32(SWSM);
 362                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
 363                 break;
 364         case e1000_82571:
 365         case e1000_82572:
 366         case e1000_80003es2lan:
 367         case e1000_ich8lan:
 368                 ctrl_ext = er32(CTRL_EXT);
 369                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 370                 break;
 371         default:
 372                 break;
 373         }
 374 }
 375
 376 /**
 377  * e1000_get_hw_control - get control of the h/w from f/w
 378  * @adapter: address of board private structure
 379  *
 380  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 381  * For ASF and Pass Through versions of f/w this means that
 382  * the driver is loaded. For AMT version (only with 82573)
 383  * of the f/w this means that the network i/f is open.
 384  *
 385  **/
 386
 387 static void e1000_get_hw_control(struct e1000_adapter *adapter)
 388 {
 389         u32 ctrl_ext;
 390         u32 swsm;
 391         struct e1000_hw *hw = &adapter->hw;
 392
 393         /* Let firmware know the driver has taken over */
 394         switch (hw->mac_type) {
 395         case e1000_82573:
 396                 swsm = er32(SWSM);
 397                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
 398                 break;
 399         case e1000_82571:
 400         case e1000_82572:
 401         case e1000_80003es2lan:
 402         case e1000_ich8lan:
 403                 ctrl_ext = er32(CTRL_EXT);
 404                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 405                 break;
 406         default:
 407                 break;
 408         }
 409 }
 410
 411 static void e1000_init_manageability(struct e1000_adapter *adapter)
 412 {
 413         struct e1000_hw *hw = &adapter->hw;
 414
 415         if (adapter->en_mng_pt) {
 416                 u32 manc = er32(MANC);
 417
 418                 /* disable hardware interception of ARP */
 419                 manc &= ~(E1000_MANC_ARP_EN);
 420
 421                 /* enable receiving management packets to the host */
 422                 /* this will probably generate destination unreachable messages
 423                  * from the host OS, but the packets will be handled on SMBUS */
 424                 if (hw->has_manc2h) {
 425                         u32 manc2h = er32(MANC2H);
 426
 427                         manc |= E1000_MANC_EN_MNG2HOST;
 428 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 429 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 430                         manc2h |= E1000_MNG2HOST_PORT_623;
 431                         manc2h |= E1000_MNG2HOST_PORT_664;
 432                         ew32(MANC2H, manc2h);
 433                 }
 434
 435                 ew32(MANC, manc);
 436         }
 437 }
 438
 439 static void e1000_release_manageability(struct e1000_adapter *adapter)
 440 {
 441         struct e1000_hw *hw = &adapter->hw;
 442
 443         if (adapter->en_mng_pt) {
 444                 u32 manc = er32(MANC);
 445
 446                 /* re-enable hardware interception of ARP */
 447                 manc |= E1000_MANC_ARP_EN;
 448
 449                 if (hw->has_manc2h)
 450                         manc &= ~E1000_MANC_EN_MNG2HOST;
 451
 452                 /* don't explicitly have to mess with MANC2H since
 453                  * MANC has an enable disable that gates MANC2H */
 454
 455                 ew32(MANC, manc);
 456         }
 457 }
 458
 459 /**
 460  * e1000_configure - configure the hardware for RX and TX
 461  * @adapter = private board structure
 462  **/
 463 static void e1000_configure(struct e1000_adapter *adapter)
 464 {
 465         struct net_device *netdev = adapter->netdev;
 466         int i;
 467
 468         e1000_set_rx_mode(netdev);
 469
 470         e1000_restore_vlan(adapter);
 471         e1000_init_manageability(adapter);
 472
 473         e1000_configure_tx(adapter);
 474         e1000_setup_rctl(adapter);
 475         e1000_configure_rx(adapter);
 476         /* call E1000_DESC_UNUSED which always leaves
 477          * at least 1 descriptor unused to make sure
 478          * next_to_use != next_to_clean */
 479         for (i = 0; i < adapter->num_rx_queues; i++) {
 480                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 481                 adapter->alloc_rx_buf(adapter, ring,
 482                                       E1000_DESC_UNUSED(ring));
 483         }
 484
 485         adapter->tx_queue_len = netdev->tx_queue_len;
 486 }
 487
 488 int e1000_up(struct e1000_adapter *adapter)
 489 {
 490         struct e1000_hw *hw = &adapter->hw;
 491
 492         /* hardware has been reset, we need to reload some things */
 493         e1000_configure(adapter);
 494
 495         clear_bit(__E1000_DOWN, &adapter->flags);
 496
 497         napi_enable(&adapter->napi);
 498
 499         e1000_irq_enable(adapter);
 500
 501         /* fire a link change interrupt to start the watchdog */
 502         ew32(ICS, E1000_ICS_LSC);
 503         return 0;
 504 }
 505
 506 /**
 507  * e1000_power_up_phy - restore link in case the phy was powered down
 508  * @adapter: address of board private structure
 509  *
 510  * The phy may be powered down to save power and turn off link when the
 511  * driver is unloaded and wake on lan is not enabled (among others)
 512  * *** this routine MUST be followed by a call to e1000_reset ***
 513  *
 514  **/
 515
 516 void e1000_power_up_phy(struct e1000_adapter *adapter)
 517 {
 518         struct e1000_hw *hw = &adapter->hw;
 519         u16 mii_reg = 0;
 520
 521         /* Just clear the power down bit to wake the phy back up */
 522         if (hw->media_type == e1000_media_type_copper) {
 523                 /* according to the manual, the phy will retain its
 524                  * settings across a power-down/up cycle */
 525                 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
 526                 mii_reg &= ~MII_CR_POWER_DOWN;
 527                 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
 528         }
 529 }
 530
 531 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 532 {
 533         struct e1000_hw *hw = &adapter->hw;
 534
 535         /* Power down the PHY so no link is implied when interface is down *
 536          * The PHY cannot be powered down if any of the following is true *
 537          * (a) WoL is enabled
 538          * (b) AMT is active
 539          * (c) SoL/IDER session is active */
 540         if (!adapter->wol && hw->mac_type >= e1000_82540 &&
 541            hw->media_type == e1000_media_type_copper) {
 542                 u16 mii_reg = 0;
 543
 544                 switch (hw->mac_type) {
 545                 case e1000_82540:
 546                 case e1000_82545:
 547                 case e1000_82545_rev_3:
 548                 case e1000_82546:
 549                 case e1000_82546_rev_3:
 550                 case e1000_82541:
 551                 case e1000_82541_rev_2:
 552                 case e1000_82547:
 553                 case e1000_82547_rev_2:
 554                         if (er32(MANC) & E1000_MANC_SMBUS_EN)
 555                                 goto out;
 556                         break;
 557                 case e1000_82571:
 558                 case e1000_82572:
 559                 case e1000_82573:
 560                 case e1000_80003es2lan:
 561                 case e1000_ich8lan:
 562                         if (e1000_check_mng_mode(hw) ||
 563                             e1000_check_phy_reset_block(hw))
 564                                 goto out;
 565                         break;
 566                 default:
 567                         goto out;
 568                 }
 569                 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
 570                 mii_reg |= MII_CR_POWER_DOWN;
 571                 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
 572                 mdelay(1);
 573         }
 574 out:
 575         return;
 576 }
 577
 578 void e1000_down(struct e1000_adapter *adapter)
 579 {
 580         struct net_device *netdev = adapter->netdev;
 581
 582         /* signal that we're down so the interrupt handler does not
 583          * reschedule our watchdog timer */
 584         set_bit(__E1000_DOWN, &adapter->flags);
 585
 586         napi_disable(&adapter->napi);
 587
 588         e1000_irq_disable(adapter);
 589
 590         del_timer_sync(&adapter->tx_fifo_stall_timer);
 591         del_timer_sync(&adapter->watchdog_timer);
 592         del_timer_sync(&adapter->phy_info_timer);
 593
 594         netdev->tx_queue_len = adapter->tx_queue_len;
 595         adapter->link_speed = 0;
 596         adapter->link_duplex = 0;
 597         netif_carrier_off(netdev);
 598         netif_stop_queue(netdev);
 599
 600         e1000_reset(adapter);
 601         e1000_clean_all_tx_rings(adapter);
 602         e1000_clean_all_rx_rings(adapter);
 603 }
 604
 605 void e1000_reinit_locked(struct e1000_adapter *adapter)
 606 {
 607         WARN_ON(in_interrupt());
 608         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 609                 msleep(1);
 610         e1000_down(adapter);
 611         e1000_up(adapter);
 612         clear_bit(__E1000_RESETTING, &adapter->flags);
 613 }
 614
 615 void e1000_reset(struct e1000_adapter *adapter)
 616 {
 617         struct e1000_hw *hw = &adapter->hw;
 618         u32 pba = 0, tx_space, min_tx_space, min_rx_space;
 619         u16 fc_high_water_mark = E1000_FC_HIGH_DIFF;
 620         bool legacy_pba_adjust = false;
 621
 622         /* Repartition Pba for greater than 9k mtu
 623          * To take effect CTRL.RST is required.
 624          */
 625
 626         switch (hw->mac_type) {
 627         case e1000_82542_rev2_0:
 628         case e1000_82542_rev2_1:
 629         case e1000_82543:
 630         case e1000_82544:
 631         case e1000_82540:
 632         case e1000_82541:
 633         case e1000_82541_rev_2:
 634                 legacy_pba_adjust = true;
 635                 pba = E1000_PBA_48K;
 636                 break;
 637         case e1000_82545:
 638         case e1000_82545_rev_3:
 639         case e1000_82546:
 640         case e1000_82546_rev_3:
 641                 pba = E1000_PBA_48K;
 642                 break;
 643         case e1000_82547:
 644         case e1000_82547_rev_2:
 645                 legacy_pba_adjust = true;
 646                 pba = E1000_PBA_30K;
 647                 break;
 648         case e1000_82571:
 649         case e1000_82572:
 650         case e1000_80003es2lan:
 651                 pba = E1000_PBA_38K;
 652                 break;
 653         case e1000_82573:
 654                 pba = E1000_PBA_20K;
 655                 break;
 656         case e1000_ich8lan:
 657                 pba = E1000_PBA_8K;
 658         case e1000_undefined:
 659         case e1000_num_macs:
 660                 break;
 661         }
 662
 663         if (legacy_pba_adjust) {
 664                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 665                         pba -= 8; /* allocate more FIFO for Tx */
 666
 667                 if (hw->mac_type == e1000_82547) {
 668                         adapter->tx_fifo_head = 0;
 669                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 670                         adapter->tx_fifo_size =
 671                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 672                         atomic_set(&adapter->tx_fifo_stall, 0);
 673                 }
 674         } else if (hw->max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 675                 /* adjust PBA for jumbo frames */
 676                 ew32(PBA, pba);
 677
 678                 /* To maintain wire speed transmits, the Tx FIFO should be
 679                  * large enough to accomodate two full transmit packets,
 680                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 681                  * the Rx FIFO should be large enough to accomodate at least
 682                  * one full receive packet and is similarly rounded up and
 683                  * expressed in KB. */
 684                 pba = er32(PBA);
 685                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 686                 tx_space = pba >> 16;
 687                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 688                 pba &= 0xffff;
 689                 /* don't include ethernet FCS because hardware appends/strips */
 690                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 691                                VLAN_TAG_SIZE;
 692                 min_tx_space = min_rx_space;
 693                 min_tx_space *= 2;
 694                 min_tx_space = ALIGN(min_tx_space, 1024);
 695                 min_tx_space >>= 10;
 696                 min_rx_space = ALIGN(min_rx_space, 1024);
 697                 min_rx_space >>= 10;
 698
 699                 /* If current Tx allocation is less than the min Tx FIFO size,
 700                  * and the min Tx FIFO size is less than the current Rx FIFO
 701                  * allocation, take space away from current Rx allocation */
 702                 if (tx_space < min_tx_space &&
 703                     ((min_tx_space - tx_space) < pba)) {
 704                         pba = pba - (min_tx_space - tx_space);
 705
 706                         /* PCI/PCIx hardware has PBA alignment constraints */
 707                         switch (hw->mac_type) {
 708                         case e1000_82545 ... e1000_82546_rev_3:
 709                                 pba &= ~(E1000_PBA_8K - 1);
 710                                 break;
 711                         default:
 712                                 break;
 713                         }
 714
 715                         /* if short on rx space, rx wins and must trump tx
 716                          * adjustment or use Early Receive if available */
 717                         if (pba < min_rx_space) {
 718                                 switch (hw->mac_type) {
 719                                 case e1000_82573:
 720                                         /* ERT enabled in e1000_configure_rx */
 721                                         break;
 722                                 default:
 723                                         pba = min_rx_space;
 724                                         break;
 725                                 }
 726                         }
 727                 }
 728         }
 729
 730         ew32(PBA, pba);
 731
 732         /* flow control settings */
 733         /* Set the FC high water mark to 90% of the FIFO size.
 734          * Required to clear last 3 LSB */
 735         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 736         /* We can't use 90% on small FIFOs because the remainder
 737          * would be less than 1 full frame.  In this case, we size
 738          * it to allow at least a full frame above the high water
 739          *  mark. */
 740         if (pba < E1000_PBA_16K)
 741                 fc_high_water_mark = (pba * 1024) - 1600;
 742
 743         hw->fc_high_water = fc_high_water_mark;
 744         hw->fc_low_water = fc_high_water_mark - 8;
 745         if (hw->mac_type == e1000_80003es2lan)
 746                 hw->fc_pause_time = 0xFFFF;
 747         else
 748                 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
 749         hw->fc_send_xon = 1;
 750         hw->fc = hw->original_fc;
 751
 752         /* Allow time for pending master requests to run */
 753         e1000_reset_hw(hw);
 754         if (hw->mac_type >= e1000_82544)
 755                 ew32(WUC, 0);
 756
 757         if (e1000_init_hw(hw))
 758                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 759         e1000_update_mng_vlan(adapter);
 760
 761         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 762         if (hw->mac_type >= e1000_82544 &&
 763             hw->mac_type <= e1000_82547_rev_2 &&
 764             hw->autoneg == 1 &&
 765             hw->autoneg_advertised == ADVERTISE_1000_FULL) {
 766                 u32 ctrl = er32(CTRL);
 767                 /* clear phy power management bit if we are in gig only mode,
 768                  * which if enabled will attempt negotiation to 100Mb, which
 769                  * can cause a loss of link at power off or driver unload */
 770                 ctrl &= ~E1000_CTRL_SWDPIN3;
 771                 ew32(CTRL, ctrl);
 772         }
 773
 774         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 775         ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
 776
 777         e1000_reset_adaptive(hw);
 778         e1000_phy_get_info(hw, &adapter->phy_info);
 779
 780         if (!adapter->smart_power_down &&
 781             (hw->mac_type == e1000_82571 ||
 782              hw->mac_type == e1000_82572)) {
 783                 u16 phy_data = 0;
 784                 /* speed up time to link by disabling smart power down, ignore
 785                  * the return value of this function because there is nothing
 786                  * different we would do if it failed */
 787                 e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 788                                    &phy_data);
 789                 phy_data &= ~IGP02E1000_PM_SPD;
 790                 e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 791                                     phy_data);
 792         }
 793
 794         e1000_release_manageability(adapter);
 795 }
 796
 797 /**
 798  *  Dump the eeprom for users having checksum issues
 799  **/
 800 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
 801 {
 802         struct net_device *netdev = adapter->netdev;
 803         struct ethtool_eeprom eeprom;
 804         const struct ethtool_ops *ops = netdev->ethtool_ops;
 805         u8 *data;
 806         int i;
 807         u16 csum_old, csum_new = 0;
 808
 809         eeprom.len = ops->get_eeprom_len(netdev);
 810         eeprom.offset = 0;
 811
 812         data = kmalloc(eeprom.len, GFP_KERNEL);
 813         if (!data) {
 814                 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
 815                        " data\n");
 816                 return;
 817         }
 818
 819         ops->get_eeprom(netdev, &eeprom, data);
 820
 821         csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
 822                    (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
 823         for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
 824                 csum_new += data[i] + (data[i + 1] << 8);
 825         csum_new = EEPROM_SUM - csum_new;
 826
 827         printk(KERN_ERR "/*********************/\n");
 828         printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
 829         printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
 830
 831         printk(KERN_ERR "Offset    Values\n");
 832         printk(KERN_ERR "========  ======\n");
 833         print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
 834
 835         printk(KERN_ERR "Include this output when contacting your support "
 836                "provider.\n");
 837         printk(KERN_ERR "This is not a software error! Something bad "
 838                "happened to your hardware or\n");
 839         printk(KERN_ERR "EEPROM image. Ignoring this "
 840                "problem could result in further problems,\n");
 841         printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
 842         printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
 843                "which is invalid\n");
 844         printk(KERN_ERR "and requires you to set the proper MAC "
 845                "address manually before continuing\n");
 846         printk(KERN_ERR "to enable this network device.\n");
 847         printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
 848                "to your hardware vendor\n");
 849         printk(KERN_ERR "or Intel Customer Support.\n");
 850         printk(KERN_ERR "/*********************/\n");
 851
 852         kfree(data);
 853 }
 854
 855 /**
 856  * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
 857  * @pdev: PCI device information struct
 858  *
 859  * Return true if an adapter needs ioport resources
 860  **/
 861 static int e1000_is_need_ioport(struct pci_dev *pdev)
 862 {
 863         switch (pdev->device) {
 864         case E1000_DEV_ID_82540EM:
 865         case E1000_DEV_ID_82540EM_LOM:
 866         case E1000_DEV_ID_82540EP:
 867         case E1000_DEV_ID_82540EP_LOM:
 868         case E1000_DEV_ID_82540EP_LP:
 869         case E1000_DEV_ID_82541EI:
 870         case E1000_DEV_ID_82541EI_MOBILE:
 871         case E1000_DEV_ID_82541ER:
 872         case E1000_DEV_ID_82541ER_LOM:
 873         case E1000_DEV_ID_82541GI:
 874         case E1000_DEV_ID_82541GI_LF:
 875         case E1000_DEV_ID_82541GI_MOBILE:
 876         case E1000_DEV_ID_82544EI_COPPER:
 877         case E1000_DEV_ID_82544EI_FIBER:
 878         case E1000_DEV_ID_82544GC_COPPER:
 879         case E1000_DEV_ID_82544GC_LOM:
 880         case E1000_DEV_ID_82545EM_COPPER:
 881         case E1000_DEV_ID_82545EM_FIBER:
 882         case E1000_DEV_ID_82546EB_COPPER:
 883         case E1000_DEV_ID_82546EB_FIBER:
 884         case E1000_DEV_ID_82546EB_QUAD_COPPER:
 885                 return true;
 886         default:
 887                 return false;
 888         }
 889 }
 890
 891 /**
 892  * e1000_probe - Device Initialization Routine
 893  * @pdev: PCI device information struct
 894  * @ent: entry in e1000_pci_tbl
 895  *
 896  * Returns 0 on success, negative on failure
 897  *
 898  * e1000_probe initializes an adapter identified by a pci_dev structure.
 899  * The OS initialization, configuring of the adapter private structure,
 900  * and a hardware reset occur.
 901  **/
 902 static int __devinit e1000_probe(struct pci_dev *pdev,
 903                                  const struct pci_device_id *ent)
 904 {
 905         struct net_device *netdev;
 906         struct e1000_adapter *adapter;
 907         struct e1000_hw *hw;
 908
 909         static int cards_found = 0;
 910         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 911         int i, err, pci_using_dac;
 912         u16 eeprom_data = 0;
 913         u16 eeprom_apme_mask = E1000_EEPROM_APME;
 914         int bars, need_ioport;
 915
 916         /* do not allocate ioport bars when not needed */
 917         need_ioport = e1000_is_need_ioport(pdev);
 918         if (need_ioport) {
 919                 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
 920                 err = pci_enable_device(pdev);
 921         } else {
 922                 bars = pci_select_bars(pdev, IORESOURCE_MEM);
 923                 err = pci_enable_device(pdev);
 924         }
 925         if (err)
 926                 return err;
 927
 928         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
 929             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
 930                 pci_using_dac = 1;
 931         } else {
 932                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 933                 if (err) {
 934                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 935                         if (err) {
 936                                 E1000_ERR("No usable DMA configuration, "
 937                                           "aborting\n");
 938                                 goto err_dma;
 939                         }
 940                 }
 941                 pci_using_dac = 0;
 942         }
 943
 944         err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
 945         if (err)
 946                 goto err_pci_reg;
 947
 948         pci_set_master(pdev);
 949
 950         err = -ENOMEM;
 951         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 952         if (!netdev)
 953                 goto err_alloc_etherdev;
 954
 955         SET_NETDEV_DEV(netdev, &pdev->dev);
 956
 957         pci_set_drvdata(pdev, netdev);
 958         adapter = netdev_priv(netdev);
 959         adapter->netdev = netdev;
 960         adapter->pdev = pdev;
 961         adapter->msg_enable = (1 << debug) - 1;
 962         adapter->bars = bars;
 963         adapter->need_ioport = need_ioport;
 964
 965         hw = &adapter->hw;
 966         hw->back = adapter;
 967
 968         err = -EIO;
 969         hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
 970         if (!hw->hw_addr)
 971                 goto err_ioremap;
 972
 973         if (adapter->need_ioport) {
 974                 for (i = BAR_1; i <= BAR_5; i++) {
 975                         if (pci_resource_len(pdev, i) == 0)
 976                                 continue;
 977                         if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 978                                 hw->io_base = pci_resource_start(pdev, i);
 979                                 break;
 980                         }
 981                 }
 982         }
 983
 984         netdev->open = &e1000_open;
 985         netdev->stop = &e1000_close;
 986         netdev->hard_start_xmit = &e1000_xmit_frame;
 987         netdev->get_stats = &e1000_get_stats;
 988         netdev->set_rx_mode = &e1000_set_rx_mode;
 989         netdev->set_mac_address = &e1000_set_mac;
 990         netdev->change_mtu = &e1000_change_mtu;
 991         netdev->do_ioctl = &e1000_ioctl;
 992         e1000_set_ethtool_ops(netdev);
 993         netdev->tx_timeout = &e1000_tx_timeout;
 994         netdev->watchdog_timeo = 5 * HZ;
 995         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
 996         netdev->vlan_rx_register = e1000_vlan_rx_register;
 997         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 998         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 999 #ifdef CONFIG_NET_POLL_CONTROLLER
1000         netdev->poll_controller = e1000_netpoll;
1001 #endif
1002         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1003
1004         adapter->bd_number = cards_found;
1005
1006         /* setup the private structure */
1007
1008         err = e1000_sw_init(adapter);
1009         if (err)
1010                 goto err_sw_init;
1011
1012         err = -EIO;
1013         /* Flash BAR mapping must happen after e1000_sw_init
1014          * because it depends on mac_type */
1015         if ((hw->mac_type == e1000_ich8lan) &&
1016            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1017                 hw->flash_address = pci_ioremap_bar(pdev, 1);
1018                 if (!hw->flash_address)
1019                         goto err_flashmap;
1020         }
1021
1022         if (e1000_check_phy_reset_block(hw))
1023                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1024
1025         if (hw->mac_type >= e1000_82543) {
1026                 netdev->features = NETIF_F_SG |
1027                                    NETIF_F_HW_CSUM |
1028                                    NETIF_F_HW_VLAN_TX |
1029                                    NETIF_F_HW_VLAN_RX |
1030                                    NETIF_F_HW_VLAN_FILTER;
1031                 if (hw->mac_type == e1000_ich8lan)
1032                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1033         }
1034
1035         if ((hw->mac_type >= e1000_82544) &&
1036            (hw->mac_type != e1000_82547))
1037                 netdev->features |= NETIF_F_TSO;
1038
1039         if (hw->mac_type > e1000_82547_rev_2)
1040                 netdev->features |= NETIF_F_TSO6;
1041         if (pci_using_dac)
1042                 netdev->features |= NETIF_F_HIGHDMA;
1043
1044         netdev->features |= NETIF_F_LLTX;
1045
1046         netdev->vlan_features |= NETIF_F_TSO;
1047         netdev->vlan_features |= NETIF_F_TSO6;
1048         netdev->vlan_features |= NETIF_F_HW_CSUM;
1049         netdev->vlan_features |= NETIF_F_SG;
1050
1051         adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1052
1053         /* initialize eeprom parameters */
1054         if (e1000_init_eeprom_params(hw)) {
1055                 E1000_ERR("EEPROM initialization failed\n");
1056                 goto err_eeprom;
1057         }
1058
1059         /* before reading the EEPROM, reset the controller to
1060          * put the device in a known good starting state */
1061
1062         e1000_reset_hw(hw);
1063
1064         /* make sure the EEPROM is good */
1065         if (e1000_validate_eeprom_checksum(hw) < 0) {
1066                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1067                 e1000_dump_eeprom(adapter);
1068                 /*
1069                  * set MAC address to all zeroes to invalidate and temporary
1070                  * disable this device for the user. This blocks regular
1071                  * traffic while still permitting ethtool ioctls from reaching
1072                  * the hardware as well as allowing the user to run the
1073                  * interface after manually setting a hw addr using
1074                  * `ip set address`
1075                  */
1076                 memset(hw->mac_addr, 0, netdev->addr_len);
1077         } else {
1078                 /* copy the MAC address out of the EEPROM */
1079                 if (e1000_read_mac_addr(hw))
1080                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1081         }
1082         /* don't block initalization here due to bad MAC address */
1083         memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1084         memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1085
1086         if (!is_valid_ether_addr(netdev->perm_addr))
1087                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1088
1089         e1000_get_bus_info(hw);
1090
1091         init_timer(&adapter->tx_fifo_stall_timer);
1092         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1093         adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1094
1095         init_timer(&adapter->watchdog_timer);
1096         adapter->watchdog_timer.function = &e1000_watchdog;
1097         adapter->watchdog_timer.data = (unsigned long) adapter;
1098
1099         init_timer(&adapter->phy_info_timer);
1100         adapter->phy_info_timer.function = &e1000_update_phy_info;
1101         adapter->phy_info_timer.data = (unsigned long)adapter;
1102
1103         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1104
1105         e1000_check_options(adapter);
1106
1107         /* Initial Wake on LAN setting
1108          * If APM wake is enabled in the EEPROM,
1109          * enable the ACPI Magic Packet filter
1110          */
1111
1112         switch (hw->mac_type) {
1113         case e1000_82542_rev2_0:
1114         case e1000_82542_rev2_1:
1115         case e1000_82543:
1116                 break;
1117         case e1000_82544:
1118                 e1000_read_eeprom(hw,
1119                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1120                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1121                 break;
1122         case e1000_ich8lan:
1123                 e1000_read_eeprom(hw,
1124                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1125                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1126                 break;
1127         case e1000_82546:
1128         case e1000_82546_rev_3:
1129         case e1000_82571:
1130         case e1000_80003es2lan:
1131                 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1132                         e1000_read_eeprom(hw,
1133                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1134                         break;
1135                 }
1136                 /* Fall Through */
1137         default:
1138                 e1000_read_eeprom(hw,
1139                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1140                 break;
1141         }
1142         if (eeprom_data & eeprom_apme_mask)
1143                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1144
1145         /* now that we have the eeprom settings, apply the special cases
1146          * where the eeprom may be wrong or the board simply won't support
1147          * wake on lan on a particular port */
1148         switch (pdev->device) {
1149         case E1000_DEV_ID_82546GB_PCIE:
1150                 adapter->eeprom_wol = 0;
1151                 break;
1152         case E1000_DEV_ID_82546EB_FIBER:
1153         case E1000_DEV_ID_82546GB_FIBER:
1154         case E1000_DEV_ID_82571EB_FIBER:
1155                 /* Wake events only supported on port A for dual fiber
1156                  * regardless of eeprom setting */
1157                 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1158                         adapter->eeprom_wol = 0;
1159                 break;
1160         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1161         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1162         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1163         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1164         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1165                 /* if quad port adapter, disable WoL on all but port A */
1166                 if (global_quad_port_a != 0)
1167                         adapter->eeprom_wol = 0;
1168                 else
1169                         adapter->quad_port_a = 1;
1170                 /* Reset for multiple quad port adapters */
1171                 if (++global_quad_port_a == 4)
1172                         global_quad_port_a = 0;
1173                 break;
1174         }
1175
1176         /* initialize the wol settings based on the eeprom settings */
1177         adapter->wol = adapter->eeprom_wol;
1178         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1179
1180         /* print bus type/speed/width info */
1181         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1182                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1183                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1184                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1185                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1186                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1187                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1188                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1189                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1190                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1191                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1192                  "32-bit"));
1193
1194         printk("%pM\n", netdev->dev_addr);
1195
1196         if (hw->bus_type == e1000_bus_type_pci_express) {
1197                 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1198                         "longer be supported by this driver in the future.\n",
1199                         pdev->vendor, pdev->device);
1200                 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1201                         "driver instead.\n");
1202         }
1203
1204         /* reset the hardware with the new settings */
1205         e1000_reset(adapter);
1206
1207         /* If the controller is 82573 and f/w is AMT, do not set
1208          * DRV_LOAD until the interface is up.  For all other cases,
1209          * let the f/w know that the h/w is now under the control
1210          * of the driver. */
1211         if (hw->mac_type != e1000_82573 ||
1212             !e1000_check_mng_mode(hw))
1213                 e1000_get_hw_control(adapter);
1214
1215         /* tell the stack to leave us alone until e1000_open() is called */
1216         netif_carrier_off(netdev);
1217         netif_stop_queue(netdev);
1218
1219         strcpy(netdev->name, "eth%d");
1220         err = register_netdev(netdev);
1221         if (err)
1222                 goto err_register;
1223
1224         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1225
1226         cards_found++;
1227         return 0;
1228
1229 err_register:
1230         e1000_release_hw_control(adapter);
1231 err_eeprom:
1232         if (!e1000_check_phy_reset_block(hw))
1233                 e1000_phy_hw_reset(hw);
1234
1235         if (hw->flash_address)
1236                 iounmap(hw->flash_address);
1237 err_flashmap:
1238         for (i = 0; i < adapter->num_rx_queues; i++)
1239                 dev_put(&adapter->polling_netdev[i]);
1240
1241         kfree(adapter->tx_ring);
1242         kfree(adapter->rx_ring);
1243         kfree(adapter->polling_netdev);
1244 err_sw_init:
1245         iounmap(hw->hw_addr);
1246 err_ioremap:
1247         free_netdev(netdev);
1248 err_alloc_etherdev:
1249         pci_release_selected_regions(pdev, bars);
1250 err_pci_reg:
1251 err_dma:
1252         pci_disable_device(pdev);
1253         return err;
1254 }
1255
1256 /**
1257  * e1000_remove - Device Removal Routine
1258  * @pdev: PCI device information struct
1259  *
1260  * e1000_remove is called by the PCI subsystem to alert the driver
1261  * that it should release a PCI device.  The could be caused by a
1262  * Hot-Plug event, or because the driver is going to be removed from
1263  * memory.
1264  **/
1265
1266 static void __devexit e1000_remove(struct pci_dev *pdev)
1267 {
1268         struct net_device *netdev = pci_get_drvdata(pdev);
1269         struct e1000_adapter *adapter = netdev_priv(netdev);
1270         struct e1000_hw *hw = &adapter->hw;
1271         int i;
1272
1273         cancel_work_sync(&adapter->reset_task);
1274
1275         e1000_release_manageability(adapter);
1276
1277         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1278          * would have already happened in close and is redundant. */
1279         e1000_release_hw_control(adapter);
1280
1281         for (i = 0; i < adapter->num_rx_queues; i++)
1282                 dev_put(&adapter->polling_netdev[i]);
1283
1284         unregister_netdev(netdev);
1285
1286         if (!e1000_check_phy_reset_block(hw))
1287                 e1000_phy_hw_reset(hw);
1288
1289         kfree(adapter->tx_ring);
1290         kfree(adapter->rx_ring);
1291         kfree(adapter->polling_netdev);
1292
1293         iounmap(hw->hw_addr);
1294         if (hw->flash_address)
1295                 iounmap(hw->flash_address);
1296         pci_release_selected_regions(pdev, adapter->bars);
1297
1298         free_netdev(netdev);
1299
1300         pci_disable_device(pdev);
1301 }
1302
1303 /**
1304  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1305  * @adapter: board private structure to initialize
1306  *
1307  * e1000_sw_init initializes the Adapter private data structure.
1308  * Fields are initialized based on PCI device information and
1309  * OS network device settings (MTU size).
1310  **/
1311
1312 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1313 {
1314         struct e1000_hw *hw = &adapter->hw;
1315         struct net_device *netdev = adapter->netdev;
1316         struct pci_dev *pdev = adapter->pdev;
1317         int i;
1318
1319         /* PCI config space info */
1320
1321         hw->vendor_id = pdev->vendor;
1322         hw->device_id = pdev->device;
1323         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1324         hw->subsystem_id = pdev->subsystem_device;
1325         hw->revision_id = pdev->revision;
1326
1327         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1328
1329         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1330         hw->max_frame_size = netdev->mtu +
1331                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1332         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1333
1334         /* identify the MAC */
1335
1336         if (e1000_set_mac_type(hw)) {
1337                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1338                 return -EIO;
1339         }
1340
1341         switch (hw->mac_type) {
1342         default:
1343                 break;
1344         case e1000_82541:
1345         case e1000_82547:
1346         case e1000_82541_rev_2:
1347         case e1000_82547_rev_2:
1348                 hw->phy_init_script = 1;
1349                 break;
1350         }
1351
1352         e1000_set_media_type(hw);
1353
1354         hw->wait_autoneg_complete = false;
1355         hw->tbi_compatibility_en = true;
1356         hw->adaptive_ifs = true;
1357
1358         /* Copper options */
1359
1360         if (hw->media_type == e1000_media_type_copper) {
1361                 hw->mdix = AUTO_ALL_MODES;
1362                 hw->disable_polarity_correction = false;
1363                 hw->master_slave = E1000_MASTER_SLAVE;
1364         }
1365
1366         adapter->num_tx_queues = 1;
1367         adapter->num_rx_queues = 1;
1368
1369         if (e1000_alloc_queues(adapter)) {
1370                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1371                 return -ENOMEM;
1372         }
1373
1374         for (i = 0; i < adapter->num_rx_queues; i++) {
1375                 adapter->polling_netdev[i].priv = adapter;
1376                 dev_hold(&adapter->polling_netdev[i]);
1377                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1378         }
1379         spin_lock_init(&adapter->tx_queue_lock);
1380
1381         /* Explicitly disable IRQ since the NIC can be in any state. */
1382         e1000_irq_disable(adapter);
1383
1384         spin_lock_init(&adapter->stats_lock);
1385
1386         set_bit(__E1000_DOWN, &adapter->flags);
1387
1388         return 0;
1389 }
1390
1391 /**
1392  * e1000_alloc_queues - Allocate memory for all rings
1393  * @adapter: board private structure to initialize
1394  *
1395  * We allocate one ring per queue at run-time since we don't know the
1396  * number of queues at compile-time.  The polling_netdev array is
1397  * intended for Multiqueue, but should work fine with a single queue.
1398  **/
1399
1400 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1401 {
1402         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1403                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1404         if (!adapter->tx_ring)
1405                 return -ENOMEM;
1406
1407         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1408                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1409         if (!adapter->rx_ring) {
1410                 kfree(adapter->tx_ring);
1411                 return -ENOMEM;
1412         }
1413
1414         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1415                                           sizeof(struct net_device),
1416                                           GFP_KERNEL);
1417         if (!adapter->polling_netdev) {
1418                 kfree(adapter->tx_ring);
1419                 kfree(adapter->rx_ring);
1420                 return -ENOMEM;
1421         }
1422
1423         return E1000_SUCCESS;
1424 }
1425
1426 /**
1427  * e1000_open - Called when a network interface is made active
1428  * @netdev: network interface device structure
1429  *
1430  * Returns 0 on success, negative value on failure
1431  *
1432  * The open entry point is called when a network interface is made
1433  * active by the system (IFF_UP).  At this point all resources needed
1434  * for transmit and receive operations are allocated, the interrupt
1435  * handler is registered with the OS, the watchdog timer is started,
1436  * and the stack is notified that the interface is ready.
1437  **/
1438
1439 static int e1000_open(struct net_device *netdev)
1440 {
1441         struct e1000_adapter *adapter = netdev_priv(netdev);
1442         struct e1000_hw *hw = &adapter->hw;
1443         int err;
1444
1445         /* disallow open during test */
1446         if (test_bit(__E1000_TESTING, &adapter->flags))
1447                 return -EBUSY;
1448
1449         /* allocate transmit descriptors */
1450         err = e1000_setup_all_tx_resources(adapter);
1451         if (err)
1452                 goto err_setup_tx;
1453
1454         /* allocate receive descriptors */
1455         err = e1000_setup_all_rx_resources(adapter);
1456         if (err)
1457                 goto err_setup_rx;
1458
1459         e1000_power_up_phy(adapter);
1460
1461         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1462         if ((hw->mng_cookie.status &
1463                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1464                 e1000_update_mng_vlan(adapter);
1465         }
1466
1467         /* If AMT is enabled, let the firmware know that the network
1468          * interface is now open */
1469         if (hw->mac_type == e1000_82573 &&
1470             e1000_check_mng_mode(hw))
1471                 e1000_get_hw_control(adapter);
1472
1473         /* before we allocate an interrupt, we must be ready to handle it.
1474          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1475          * as soon as we call pci_request_irq, so we have to setup our
1476          * clean_rx handler before we do so.  */
1477         e1000_configure(adapter);
1478
1479         err = e1000_request_irq(adapter);
1480         if (err)
1481                 goto err_req_irq;
1482
1483         /* From here on the code is the same as e1000_up() */
1484         clear_bit(__E1000_DOWN, &adapter->flags);
1485
1486         napi_enable(&adapter->napi);
1487
1488         e1000_irq_enable(adapter);
1489
1490         netif_start_queue(netdev);
1491
1492         /* fire a link status change interrupt to start the watchdog */
1493         ew32(ICS, E1000_ICS_LSC);
1494
1495         return E1000_SUCCESS;
1496
1497 err_req_irq:
1498         e1000_release_hw_control(adapter);
1499         e1000_power_down_phy(adapter);
1500         e1000_free_all_rx_resources(adapter);
1501 err_setup_rx:
1502         e1000_free_all_tx_resources(adapter);
1503 err_setup_tx:
1504         e1000_reset(adapter);
1505
1506         return err;
1507 }
1508
1509 /**
1510  * e1000_close - Disables a network interface
1511  * @netdev: network interface device structure
1512  *
1513  * Returns 0, this is not allowed to fail
1514  *
1515  * The close entry point is called when an interface is de-activated
1516  * by the OS.  The hardware is still under the drivers control, but
1517  * needs to be disabled.  A global MAC reset is issued to stop the
1518  * hardware, and all transmit and receive resources are freed.
1519  **/
1520
1521 static int e1000_close(struct net_device *netdev)
1522 {
1523         struct e1000_adapter *adapter = netdev_priv(netdev);
1524         struct e1000_hw *hw = &adapter->hw;
1525
1526         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1527         e1000_down(adapter);
1528         e1000_power_down_phy(adapter);
1529         e1000_free_irq(adapter);
1530
1531         e1000_free_all_tx_resources(adapter);
1532         e1000_free_all_rx_resources(adapter);
1533
1534         /* kill manageability vlan ID if supported, but not if a vlan with
1535          * the same ID is registered on the host OS (let 8021q kill it) */
1536         if ((hw->mng_cookie.status &
1537                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1538              !(adapter->vlgrp &&
1539                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1540                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1541         }
1542
1543         /* If AMT is enabled, let the firmware know that the network
1544          * interface is now closed */
1545         if (hw->mac_type == e1000_82573 &&
1546             e1000_check_mng_mode(hw))
1547                 e1000_release_hw_control(adapter);
1548
1549         return 0;
1550 }
1551
1552 /**
1553  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1554  * @adapter: address of board private structure
1555  * @start: address of beginning of memory
1556  * @len: length of memory
1557  **/
1558 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1559                                   unsigned long len)
1560 {
1561         struct e1000_hw *hw = &adapter->hw;
1562         unsigned long begin = (unsigned long)start;
1563         unsigned long end = begin + len;
1564
1565         /* First rev 82545 and 82546 need to not allow any memory
1566          * write location to cross 64k boundary due to errata 23 */
1567         if (hw->mac_type == e1000_82545 ||
1568             hw->mac_type == e1000_82546) {
1569                 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1570         }
1571
1572         return true;
1573 }
1574
1575 /**
1576  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1577  * @adapter: board private structure
1578  * @txdr:    tx descriptor ring (for a specific queue) to setup
1579  *
1580  * Return 0 on success, negative on failure
1581  **/
1582
1583 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1584                                     struct e1000_tx_ring *txdr)
1585 {
1586         struct pci_dev *pdev = adapter->pdev;
1587         int size;
1588
1589         size = sizeof(struct e1000_buffer) * txdr->count;
1590         txdr->buffer_info = vmalloc(size);
1591         if (!txdr->buffer_info) {
1592                 DPRINTK(PROBE, ERR,
1593                 "Unable to allocate memory for the transmit descriptor ring\n");
1594                 return -ENOMEM;
1595         }
1596         memset(txdr->buffer_info, 0, size);
1597
1598         /* round up to nearest 4K */
1599
1600         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1601         txdr->size = ALIGN(txdr->size, 4096);
1602
1603         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1604         if (!txdr->desc) {
1605 setup_tx_desc_die:
1606                 vfree(txdr->buffer_info);
1607                 DPRINTK(PROBE, ERR,
1608                 "Unable to allocate memory for the transmit descriptor ring\n");
1609                 return -ENOMEM;
1610         }
1611
1612         /* Fix for errata 23, can't cross 64kB boundary */
1613         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1614                 void *olddesc = txdr->desc;
1615                 dma_addr_t olddma = txdr->dma;
1616                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1617                                      "at %p\n", txdr->size, txdr->desc);
1618                 /* Try again, without freeing the previous */
1619                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1620                 /* Failed allocation, critical failure */
1621                 if (!txdr->desc) {
1622                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1623                         goto setup_tx_desc_die;
1624                 }
1625
1626                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1627                         /* give up */
1628                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1629                                             txdr->dma);
1630                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1631                         DPRINTK(PROBE, ERR,
1632                                 "Unable to allocate aligned memory "
1633                                 "for the transmit descriptor ring\n");
1634                         vfree(txdr->buffer_info);
1635                         return -ENOMEM;
1636                 } else {
1637                         /* Free old allocation, new allocation was successful */
1638                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1639                 }
1640         }
1641         memset(txdr->desc, 0, txdr->size);
1642
1643         txdr->next_to_use = 0;
1644         txdr->next_to_clean = 0;
1645         spin_lock_init(&txdr->tx_lock);
1646
1647         return 0;
1648 }
1649
1650 /**
1651  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1652  *                                (Descriptors) for all queues
1653  * @adapter: board private structure
1654  *
1655  * Return 0 on success, negative on failure
1656  **/
1657
1658 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1659 {
1660         int i, err = 0;
1661
1662         for (i = 0; i < adapter->num_tx_queues; i++) {
1663                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1664                 if (err) {
1665                         DPRINTK(PROBE, ERR,
1666                                 "Allocation for Tx Queue %u failed\n", i);
1667                         for (i-- ; i >= 0; i--)
1668                                 e1000_free_tx_resources(adapter,
1669                                                         &adapter->tx_ring[i]);
1670                         break;
1671                 }
1672         }
1673
1674         return err;
1675 }
1676
1677 /**
1678  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1679  * @adapter: board private structure
1680  *
1681  * Configure the Tx unit of the MAC after a reset.
1682  **/
1683
1684 static void e1000_configure_tx(struct e1000_adapter *adapter)
1685 {
1686         u64 tdba;
1687         struct e1000_hw *hw = &adapter->hw;
1688         u32 tdlen, tctl, tipg, tarc;
1689         u32 ipgr1, ipgr2;
1690
1691         /* Setup the HW Tx Head and Tail descriptor pointers */
1692
1693         switch (adapter->num_tx_queues) {
1694         case 1:
1695         default:
1696                 tdba = adapter->tx_ring[0].dma;
1697                 tdlen = adapter->tx_ring[0].count *
1698                         sizeof(struct e1000_tx_desc);
1699                 ew32(TDLEN, tdlen);
1700                 ew32(TDBAH, (tdba >> 32));
1701                 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1702                 ew32(TDT, 0);
1703                 ew32(TDH, 0);
1704                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1705                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1706                 break;
1707         }
1708
1709         /* Set the default values for the Tx Inter Packet Gap timer */
1710         if (hw->mac_type <= e1000_82547_rev_2 &&
1711             (hw->media_type == e1000_media_type_fiber ||
1712              hw->media_type == e1000_media_type_internal_serdes))
1713                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1714         else
1715                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1716
1717         switch (hw->mac_type) {
1718         case e1000_82542_rev2_0:
1719         case e1000_82542_rev2_1:
1720                 tipg = DEFAULT_82542_TIPG_IPGT;
1721                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1722                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1723                 break;
1724         case e1000_80003es2lan:
1725                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1726                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1727                 break;
1728         default:
1729                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1730                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1731                 break;
1732         }
1733         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1734         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1735         ew32(TIPG, tipg);
1736
1737         /* Set the Tx Interrupt Delay register */
1738
1739         ew32(TIDV, adapter->tx_int_delay);
1740         if (hw->mac_type >= e1000_82540)
1741                 ew32(TADV, adapter->tx_abs_int_delay);
1742
1743         /* Program the Transmit Control Register */
1744
1745         tctl = er32(TCTL);
1746         tctl &= ~E1000_TCTL_CT;
1747         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1748                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1749
1750         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1751                 tarc = er32(TARC0);
1752                 /* set the speed mode bit, we'll clear it if we're not at
1753                  * gigabit link later */
1754                 tarc |= (1 << 21);
1755                 ew32(TARC0, tarc);
1756         } else if (hw->mac_type == e1000_80003es2lan) {
1757                 tarc = er32(TARC0);
1758                 tarc |= 1;
1759                 ew32(TARC0, tarc);
1760                 tarc = er32(TARC1);
1761                 tarc |= 1;
1762                 ew32(TARC1, tarc);
1763         }
1764
1765         e1000_config_collision_dist(hw);
1766
1767         /* Setup Transmit Descriptor Settings for eop descriptor */
1768         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1769
1770         /* only set IDE if we are delaying interrupts using the timers */
1771         if (adapter->tx_int_delay)
1772                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1773
1774         if (hw->mac_type < e1000_82543)
1775                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1776         else
1777                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1778
1779         /* Cache if we're 82544 running in PCI-X because we'll
1780          * need this to apply a workaround later in the send path. */
1781         if (hw->mac_type == e1000_82544 &&
1782             hw->bus_type == e1000_bus_type_pcix)
1783                 adapter->pcix_82544 = 1;
1784
1785         ew32(TCTL, tctl);
1786
1787 }
1788
1789 /**
1790  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1791  * @adapter: board private structure
1792  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1793  *
1794  * Returns 0 on success, negative on failure
1795  **/
1796
1797 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1798                                     struct e1000_rx_ring *rxdr)
1799 {
1800         struct e1000_hw *hw = &adapter->hw;
1801         struct pci_dev *pdev = adapter->pdev;
1802         int size, desc_len;
1803
1804         size = sizeof(struct e1000_buffer) * rxdr->count;
1805         rxdr->buffer_info = vmalloc(size);
1806         if (!rxdr->buffer_info) {
1807                 DPRINTK(PROBE, ERR,
1808                 "Unable to allocate memory for the receive descriptor ring\n");
1809                 return -ENOMEM;
1810         }
1811         memset(rxdr->buffer_info, 0, size);
1812
1813         if (hw->mac_type <= e1000_82547_rev_2)
1814                 desc_len = sizeof(struct e1000_rx_desc);
1815         else
1816                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1817
1818         /* Round up to nearest 4K */
1819
1820         rxdr->size = rxdr->count * desc_len;
1821         rxdr->size = ALIGN(rxdr->size, 4096);
1822
1823         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1824
1825         if (!rxdr->desc) {
1826                 DPRINTK(PROBE, ERR,
1827                 "Unable to allocate memory for the receive descriptor ring\n");
1828 setup_rx_desc_die:
1829                 vfree(rxdr->buffer_info);
1830                 return -ENOMEM;
1831         }
1832
1833         /* Fix for errata 23, can't cross 64kB boundary */
1834         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1835                 void *olddesc = rxdr->desc;
1836                 dma_addr_t olddma = rxdr->dma;
1837                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1838                                      "at %p\n", rxdr->size, rxdr->desc);
1839                 /* Try again, without freeing the previous */
1840                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1841                 /* Failed allocation, critical failure */
1842                 if (!rxdr->desc) {
1843                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1844                         DPRINTK(PROBE, ERR,
1845                                 "Unable to allocate memory "
1846                                 "for the receive descriptor ring\n");
1847                         goto setup_rx_desc_die;
1848                 }
1849
1850                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1851                         /* give up */
1852                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1853                                             rxdr->dma);
1854                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1855                         DPRINTK(PROBE, ERR,
1856                                 "Unable to allocate aligned memory "
1857                                 "for the receive descriptor ring\n");
1858                         goto setup_rx_desc_die;
1859                 } else {
1860                         /* Free old allocation, new allocation was successful */
1861                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1862                 }
1863         }
1864         memset(rxdr->desc, 0, rxdr->size);
1865
1866         rxdr->next_to_clean = 0;
1867         rxdr->next_to_use = 0;
1868
1869         return 0;
1870 }
1871
1872 /**
1873  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1874  *                                (Descriptors) for all queues
1875  * @adapter: board private structure
1876  *
1877  * Return 0 on success, negative on failure
1878  **/
1879
1880 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1881 {
1882         int i, err = 0;
1883
1884         for (i = 0; i < adapter->num_rx_queues; i++) {
1885                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1886                 if (err) {
1887                         DPRINTK(PROBE, ERR,
1888                                 "Allocation for Rx Queue %u failed\n", i);
1889                         for (i-- ; i >= 0; i--)
1890                                 e1000_free_rx_resources(adapter,
1891                                                         &adapter->rx_ring[i]);
1892                         break;
1893                 }
1894         }
1895
1896         return err;
1897 }
1898
1899 /**
1900  * e1000_setup_rctl - configure the receive control registers
1901  * @adapter: Board private structure
1902  **/
1903 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1904                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1905 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1906 {
1907         struct e1000_hw *hw = &adapter->hw;
1908         u32 rctl;
1909
1910         rctl = er32(RCTL);
1911
1912         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1913
1914         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1915                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1916                 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1917
1918         if (hw->tbi_compatibility_on == 1)
1919                 rctl |= E1000_RCTL_SBP;
1920         else
1921                 rctl &= ~E1000_RCTL_SBP;
1922
1923         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1924                 rctl &= ~E1000_RCTL_LPE;
1925         else
1926                 rctl |= E1000_RCTL_LPE;
1927
1928         /* Setup buffer sizes */
1929         rctl &= ~E1000_RCTL_SZ_4096;
1930         rctl |= E1000_RCTL_BSEX;
1931         switch (adapter->rx_buffer_len) {
1932                 case E1000_RXBUFFER_256:
1933                         rctl |= E1000_RCTL_SZ_256;
1934                         rctl &= ~E1000_RCTL_BSEX;
1935                         break;
1936                 case E1000_RXBUFFER_512:
1937                         rctl |= E1000_RCTL_SZ_512;
1938                         rctl &= ~E1000_RCTL_BSEX;
1939                         break;
1940                 case E1000_RXBUFFER_1024:
1941                         rctl |= E1000_RCTL_SZ_1024;
1942                         rctl &= ~E1000_RCTL_BSEX;
1943                         break;
1944                 case E1000_RXBUFFER_2048:
1945                 default:
1946                         rctl |= E1000_RCTL_SZ_2048;
1947                         rctl &= ~E1000_RCTL_BSEX;
1948                         break;
1949                 case E1000_RXBUFFER_4096:
1950                         rctl |= E1000_RCTL_SZ_4096;
1951                         break;
1952                 case E1000_RXBUFFER_8192:
1953                         rctl |= E1000_RCTL_SZ_8192;
1954                         break;
1955                 case E1000_RXBUFFER_16384:
1956                         rctl |= E1000_RCTL_SZ_16384;
1957                         break;
1958         }
1959
1960         ew32(RCTL, rctl);
1961 }
1962
1963 /**
1964  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1965  * @adapter: board private structure
1966  *
1967  * Configure the Rx unit of the MAC after a reset.
1968  **/
1969
1970 static void e1000_configure_rx(struct e1000_adapter *adapter)
1971 {
1972         u64 rdba;
1973         struct e1000_hw *hw = &adapter->hw;
1974         u32 rdlen, rctl, rxcsum, ctrl_ext;
1975
1976         rdlen = adapter->rx_ring[0].count *
1977                 sizeof(struct e1000_rx_desc);
1978         adapter->clean_rx = e1000_clean_rx_irq;
1979         adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1980
1981         /* disable receives while setting up the descriptors */
1982         rctl = er32(RCTL);
1983         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1984
1985         /* set the Receive Delay Timer Register */
1986         ew32(RDTR, adapter->rx_int_delay);
1987
1988         if (hw->mac_type >= e1000_82540) {
1989                 ew32(RADV, adapter->rx_abs_int_delay);
1990                 if (adapter->itr_setting != 0)
1991                         ew32(ITR, 1000000000 / (adapter->itr * 256));
1992         }
1993
1994         if (hw->mac_type >= e1000_82571) {
1995                 ctrl_ext = er32(CTRL_EXT);
1996                 /* Reset delay timers after every interrupt */
1997                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1998                 /* Auto-Mask interrupts upon ICR access */
1999                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2000                 ew32(IAM, 0xffffffff);
2001                 ew32(CTRL_EXT, ctrl_ext);
2002                 E1000_WRITE_FLUSH();
2003         }
2004
2005         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2006          * the Base and Length of the Rx Descriptor Ring */
2007         switch (adapter->num_rx_queues) {
2008         case 1:
2009         default:
2010                 rdba = adapter->rx_ring[0].dma;
2011                 ew32(RDLEN, rdlen);
2012                 ew32(RDBAH, (rdba >> 32));
2013                 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2014                 ew32(RDT, 0);
2015                 ew32(RDH, 0);
2016                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2017                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2018                 break;
2019         }
2020
2021         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2022         if (hw->mac_type >= e1000_82543) {
2023                 rxcsum = er32(RXCSUM);
2024                 if (adapter->rx_csum)
2025                         rxcsum |= E1000_RXCSUM_TUOFL;
2026                 else
2027                         /* don't need to clear IPPCSE as it defaults to 0 */
2028                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2029                 ew32(RXCSUM, rxcsum);
2030         }
2031
2032         /* Enable Receives */
2033         ew32(RCTL, rctl);
2034 }
2035
2036 /**
2037  * e1000_free_tx_resources - Free Tx Resources per Queue
2038  * @adapter: board private structure
2039  * @tx_ring: Tx descriptor ring for a specific queue
2040  *
2041  * Free all transmit software resources
2042  **/
2043
2044 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2045                                     struct e1000_tx_ring *tx_ring)
2046 {
2047         struct pci_dev *pdev = adapter->pdev;
2048
2049         e1000_clean_tx_ring(adapter, tx_ring);
2050
2051         vfree(tx_ring->buffer_info);
2052         tx_ring->buffer_info = NULL;
2053
2054         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2055
2056         tx_ring->desc = NULL;
2057 }
2058
2059 /**
2060  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2061  * @adapter: board private structure
2062  *
2063  * Free all transmit software resources
2064  **/
2065
2066 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2067 {
2068         int i;
2069
2070         for (i = 0; i < adapter->num_tx_queues; i++)
2071                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2072 }
2073
2074 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2075                                              struct e1000_buffer *buffer_info)
2076 {
2077         if (buffer_info->dma) {
2078                 pci_unmap_page(adapter->pdev,
2079                                 buffer_info->dma,
2080                                 buffer_info->length,
2081                                 PCI_DMA_TODEVICE);
2082                 buffer_info->dma = 0;
2083         }
2084         if (buffer_info->skb) {
2085                 dev_kfree_skb_any(buffer_info->skb);
2086                 buffer_info->skb = NULL;
2087         }
2088         /* buffer_info must be completely set up in the transmit path */
2089 }
2090
2091 /**
2092  * e1000_clean_tx_ring - Free Tx Buffers
2093  * @adapter: board private structure
2094  * @tx_ring: ring to be cleaned
2095  **/
2096
2097 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2098                                 struct e1000_tx_ring *tx_ring)
2099 {
2100         struct e1000_hw *hw = &adapter->hw;
2101         struct e1000_buffer *buffer_info;
2102         unsigned long size;
2103         unsigned int i;
2104
2105         /* Free all the Tx ring sk_buffs */
2106
2107         for (i = 0; i < tx_ring->count; i++) {
2108                 buffer_info = &tx_ring->buffer_info[i];
2109                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2110         }
2111
2112         size = sizeof(struct e1000_buffer) * tx_ring->count;
2113         memset(tx_ring->buffer_info, 0, size);
2114
2115         /* Zero out the descriptor ring */
2116
2117         memset(tx_ring->desc, 0, tx_ring->size);
2118
2119         tx_ring->next_to_use = 0;
2120         tx_ring->next_to_clean = 0;
2121         tx_ring->last_tx_tso = 0;
2122
2123         writel(0, hw->hw_addr + tx_ring->tdh);
2124         writel(0, hw->hw_addr + tx_ring->tdt);
2125 }
2126
2127 /**
2128  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2129  * @adapter: board private structure
2130  **/
2131
2132 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2133 {
2134         int i;
2135
2136         for (i = 0; i < adapter->num_tx_queues; i++)
2137                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2138 }
2139
2140 /**
2141  * e1000_free_rx_resources - Free Rx Resources
2142  * @adapter: board private structure
2143  * @rx_ring: ring to clean the resources from
2144  *
2145  * Free all receive software resources
2146  **/
2147
2148 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2149                                     struct e1000_rx_ring *rx_ring)
2150 {
2151         struct pci_dev *pdev = adapter->pdev;
2152
2153         e1000_clean_rx_ring(adapter, rx_ring);
2154
2155         vfree(rx_ring->buffer_info);
2156         rx_ring->buffer_info = NULL;
2157
2158         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2159
2160         rx_ring->desc = NULL;
2161 }
2162
2163 /**
2164  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2165  * @adapter: board private structure
2166  *
2167  * Free all receive software resources
2168  **/
2169
2170 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2171 {
2172         int i;
2173
2174         for (i = 0; i < adapter->num_rx_queues; i++)
2175                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2176 }
2177
2178 /**
2179  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2180  * @adapter: board private structure
2181  * @rx_ring: ring to free buffers from
2182  **/
2183
2184 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2185                                 struct e1000_rx_ring *rx_ring)
2186 {
2187         struct e1000_hw *hw = &adapter->hw;
2188         struct e1000_buffer *buffer_info;
2189         struct pci_dev *pdev = adapter->pdev;
2190         unsigned long size;
2191         unsigned int i;
2192
2193         /* Free all the Rx ring sk_buffs */
2194         for (i = 0; i < rx_ring->count; i++) {
2195                 buffer_info = &rx_ring->buffer_info[i];
2196                 if (buffer_info->skb) {
2197                         pci_unmap_single(pdev,
2198                                          buffer_info->dma,
2199                                          buffer_info->length,
2200                                          PCI_DMA_FROMDEVICE);
2201
2202                         dev_kfree_skb(buffer_info->skb);
2203                         buffer_info->skb = NULL;
2204                 }
2205         }
2206
2207         size = sizeof(struct e1000_buffer) * rx_ring->count;
2208         memset(rx_ring->buffer_info, 0, size);
2209
2210         /* Zero out the descriptor ring */
2211
2212         memset(rx_ring->desc, 0, rx_ring->size);
2213
2214         rx_ring->next_to_clean = 0;
2215         rx_ring->next_to_use = 0;
2216
2217         writel(0, hw->hw_addr + rx_ring->rdh);
2218         writel(0, hw->hw_addr + rx_ring->rdt);
2219 }
2220
2221 /**
2222  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2223  * @adapter: board private structure
2224  **/
2225
2226 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2227 {
2228         int i;
2229
2230         for (i = 0; i < adapter->num_rx_queues; i++)
2231                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2232 }
2233
2234 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2235  * and memory write and invalidate disabled for certain operations
2236  */
2237 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2238 {
2239         struct e1000_hw *hw = &adapter->hw;
2240         struct net_device *netdev = adapter->netdev;
2241         u32 rctl;
2242
2243         e1000_pci_clear_mwi(hw);
2244
2245         rctl = er32(RCTL);
2246         rctl |= E1000_RCTL_RST;
2247         ew32(RCTL, rctl);
2248         E1000_WRITE_FLUSH();
2249         mdelay(5);
2250
2251         if (netif_running(netdev))
2252                 e1000_clean_all_rx_rings(adapter);
2253 }
2254
2255 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2256 {
2257         struct e1000_hw *hw = &adapter->hw;
2258         struct net_device *netdev = adapter->netdev;
2259         u32 rctl;
2260
2261         rctl = er32(RCTL);
2262         rctl &= ~E1000_RCTL_RST;
2263         ew32(RCTL, rctl);
2264         E1000_WRITE_FLUSH();
2265         mdelay(5);
2266
2267         if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2268                 e1000_pci_set_mwi(hw);
2269
2270         if (netif_running(netdev)) {
2271                 /* No need to loop, because 82542 supports only 1 queue */
2272                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2273                 e1000_configure_rx(adapter);
2274                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2275         }
2276 }
2277
2278 /**
2279  * e1000_set_mac - Change the Ethernet Address of the NIC
2280  * @netdev: network interface device structure
2281  * @p: pointer to an address structure
2282  *
2283  * Returns 0 on success, negative on failure
2284  **/
2285
2286 static int e1000_set_mac(struct net_device *netdev, void *p)
2287 {
2288         struct e1000_adapter *adapter = netdev_priv(netdev);
2289         struct e1000_hw *hw = &adapter->hw;
2290         struct sockaddr *addr = p;
2291
2292         if (!is_valid_ether_addr(addr->sa_data))
2293                 return -EADDRNOTAVAIL;
2294
2295         /* 82542 2.0 needs to be in reset to write receive address registers */
2296
2297         if (hw->mac_type == e1000_82542_rev2_0)
2298                 e1000_enter_82542_rst(adapter);
2299
2300         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2301         memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2302
2303         e1000_rar_set(hw, hw->mac_addr, 0);
2304
2305         /* With 82571 controllers, LAA may be overwritten (with the default)
2306          * due to controller reset from the other port. */
2307         if (hw->mac_type == e1000_82571) {
2308                 /* activate the work around */
2309                 hw->laa_is_present = 1;
2310
2311                 /* Hold a copy of the LAA in RAR[14] This is done so that
2312                  * between the time RAR[0] gets clobbered  and the time it
2313                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2314                  * of the RARs and no incoming packets directed to this port
2315                  * are dropped. Eventaully the LAA will be in RAR[0] and
2316                  * RAR[14] */
2317                 e1000_rar_set(hw, hw->mac_addr,
2318                                         E1000_RAR_ENTRIES - 1);
2319         }
2320
2321         if (hw->mac_type == e1000_82542_rev2_0)
2322                 e1000_leave_82542_rst(adapter);
2323
2324         return 0;
2325 }
2326
2327 /**
2328  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2329  * @netdev: network interface device structure
2330  *
2331  * The set_rx_mode entry point is called whenever the unicast or multicast
2332  * address lists or the network interface flags are updated. This routine is
2333  * responsible for configuring the hardware for proper unicast, multicast,
2334  * promiscuous mode, and all-multi behavior.
2335  **/
2336
2337 static void e1000_set_rx_mode(struct net_device *netdev)
2338 {
2339         struct e1000_adapter *adapter = netdev_priv(netdev);
2340         struct e1000_hw *hw = &adapter->hw;
2341         struct dev_addr_list *uc_ptr;
2342         struct dev_addr_list *mc_ptr;
2343         u32 rctl;
2344         u32 hash_value;
2345         int i, rar_entries = E1000_RAR_ENTRIES;
2346         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2347                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2348                                 E1000_NUM_MTA_REGISTERS;
2349
2350         if (hw->mac_type == e1000_ich8lan)
2351                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2352
2353         /* reserve RAR[14] for LAA over-write work-around */
2354         if (hw->mac_type == e1000_82571)
2355                 rar_entries--;
2356
2357         /* Check for Promiscuous and All Multicast modes */
2358
2359         rctl = er32(RCTL);
2360
2361         if (netdev->flags & IFF_PROMISC) {
2362                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2363                 rctl &= ~E1000_RCTL_VFE;
2364         } else {
2365                 if (netdev->flags & IFF_ALLMULTI) {
2366                         rctl |= E1000_RCTL_MPE;
2367                 } else {
2368                         rctl &= ~E1000_RCTL_MPE;
2369                 }
2370                 if (adapter->hw.mac_type != e1000_ich8lan)
2371                         rctl |= E1000_RCTL_VFE;
2372         }
2373
2374         uc_ptr = NULL;
2375         if (netdev->uc_count > rar_entries - 1) {
2376                 rctl |= E1000_RCTL_UPE;
2377         } else if (!(netdev->flags & IFF_PROMISC)) {
2378                 rctl &= ~E1000_RCTL_UPE;
2379                 uc_ptr = netdev->uc_list;
2380         }
2381
2382         ew32(RCTL, rctl);
2383
2384         /* 82542 2.0 needs to be in reset to write receive address registers */
2385
2386         if (hw->mac_type == e1000_82542_rev2_0)
2387                 e1000_enter_82542_rst(adapter);
2388
2389         /* load the first 14 addresses into the exact filters 1-14. Unicast
2390          * addresses take precedence to avoid disabling unicast filtering
2391          * when possible.
2392          *
2393          * RAR 0 is used for the station MAC adddress
2394          * if there are not 14 addresses, go ahead and clear the filters
2395          * -- with 82571 controllers only 0-13 entries are filled here
2396          */
2397         mc_ptr = netdev->mc_list;
2398
2399         for (i = 1; i < rar_entries; i++) {
2400                 if (uc_ptr) {
2401                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2402                         uc_ptr = uc_ptr->next;
2403                 } else if (mc_ptr) {
2404                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2405                         mc_ptr = mc_ptr->next;
2406                 } else {
2407                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2408                         E1000_WRITE_FLUSH();
2409                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2410                         E1000_WRITE_FLUSH();
2411                 }
2412         }
2413         WARN_ON(uc_ptr != NULL);
2414
2415         /* clear the old settings from the multicast hash table */
2416
2417         for (i = 0; i < mta_reg_count; i++) {
2418                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2419                 E1000_WRITE_FLUSH();
2420         }
2421
2422         /* load any remaining addresses into the hash table */
2423
2424         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2425                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2426                 e1000_mta_set(hw, hash_value);
2427         }
2428
2429         if (hw->mac_type == e1000_82542_rev2_0)
2430                 e1000_leave_82542_rst(adapter);
2431 }
2432
2433 /* Need to wait a few seconds after link up to get diagnostic information from
2434  * the phy */
2435
2436 static void e1000_update_phy_info(unsigned long data)
2437 {
2438         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2439         struct e1000_hw *hw = &adapter->hw;
2440         e1000_phy_get_info(hw, &adapter->phy_info);
2441 }
2442
2443 /**
2444  * e1000_82547_tx_fifo_stall - Timer Call-back
2445  * @data: pointer to adapter cast into an unsigned long
2446  **/
2447
2448 static void e1000_82547_tx_fifo_stall(unsigned long data)
2449 {
2450         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2451         struct e1000_hw *hw = &adapter->hw;
2452         struct net_device *netdev = adapter->netdev;
2453         u32 tctl;
2454
2455         if (atomic_read(&adapter->tx_fifo_stall)) {
2456                 if ((er32(TDT) == er32(TDH)) &&
2457                    (er32(TDFT) == er32(TDFH)) &&
2458                    (er32(TDFTS) == er32(TDFHS))) {
2459                         tctl = er32(TCTL);
2460                         ew32(TCTL, tctl & ~E1000_TCTL_EN);
2461                         ew32(TDFT, adapter->tx_head_addr);
2462                         ew32(TDFH, adapter->tx_head_addr);
2463                         ew32(TDFTS, adapter->tx_head_addr);
2464                         ew32(TDFHS, adapter->tx_head_addr);
2465                         ew32(TCTL, tctl);
2466                         E1000_WRITE_FLUSH();
2467
2468                         adapter->tx_fifo_head = 0;
2469                         atomic_set(&adapter->tx_fifo_stall, 0);
2470                         netif_wake_queue(netdev);
2471                 } else {
2472                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2473                 }
2474         }
2475 }
2476
2477 /**
2478  * e1000_watchdog - Timer Call-back
2479  * @data: pointer to adapter cast into an unsigned long
2480  **/
2481 static void e1000_watchdog(unsigned long data)
2482 {
2483         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2484         struct e1000_hw *hw = &adapter->hw;
2485         struct net_device *netdev = adapter->netdev;
2486         struct e1000_tx_ring *txdr = adapter->tx_ring;
2487         u32 link, tctl;
2488         s32 ret_val;
2489
2490         ret_val = e1000_check_for_link(hw);
2491         if ((ret_val == E1000_ERR_PHY) &&
2492             (hw->phy_type == e1000_phy_igp_3) &&
2493             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2494                 /* See e1000_kumeran_lock_loss_workaround() */
2495                 DPRINTK(LINK, INFO,
2496                         "Gigabit has been disabled, downgrading speed\n");
2497         }
2498
2499         if (hw->mac_type == e1000_82573) {
2500                 e1000_enable_tx_pkt_filtering(hw);
2501                 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2502                         e1000_update_mng_vlan(adapter);
2503         }
2504
2505         if ((hw->media_type == e1000_media_type_internal_serdes) &&
2506            !(er32(TXCW) & E1000_TXCW_ANE))
2507                 link = !hw->serdes_link_down;
2508         else
2509                 link = er32(STATUS) & E1000_STATUS_LU;
2510
2511         if (link) {
2512                 if (!netif_carrier_ok(netdev)) {
2513                         u32 ctrl;
2514                         bool txb2b = true;
2515                         e1000_get_speed_and_duplex(hw,
2516                                                    &adapter->link_speed,
2517                                                    &adapter->link_duplex);
2518
2519                         ctrl = er32(CTRL);
2520                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2521                                 "Flow Control: %s\n",
2522                                 adapter->link_speed,
2523                                 adapter->link_duplex == FULL_DUPLEX ?
2524                                 "Full Duplex" : "Half Duplex",
2525                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2526                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2527                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2528                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2529
2530                         /* tweak tx_queue_len according to speed/duplex
2531                          * and adjust the timeout factor */
2532                         netdev->tx_queue_len = adapter->tx_queue_len;
2533                         adapter->tx_timeout_factor = 1;
2534                         switch (adapter->link_speed) {
2535                         case SPEED_10:
2536                                 txb2b = false;
2537                                 netdev->tx_queue_len = 10;
2538                                 adapter->tx_timeout_factor = 8;
2539                                 break;
2540                         case SPEED_100:
2541                                 txb2b = false;
2542                                 netdev->tx_queue_len = 100;
2543                                 /* maybe add some timeout factor ? */
2544                                 break;
2545                         }
2546
2547                         if ((hw->mac_type == e1000_82571 ||
2548                              hw->mac_type == e1000_82572) &&
2549                             !txb2b) {
2550                                 u32 tarc0;
2551                                 tarc0 = er32(TARC0);
2552                                 tarc0 &= ~(1 << 21);
2553                                 ew32(TARC0, tarc0);
2554                         }
2555
2556                         /* disable TSO for pcie and 10/100 speeds, to avoid
2557                          * some hardware issues */
2558                         if (!adapter->tso_force &&
2559                             hw->bus_type == e1000_bus_type_pci_express){
2560                                 switch (adapter->link_speed) {
2561                                 case SPEED_10:
2562                                 case SPEED_100:
2563                                         DPRINTK(PROBE,INFO,
2564                                         "10/100 speed: disabling TSO\n");
2565                                         netdev->features &= ~NETIF_F_TSO;
2566                                         netdev->features &= ~NETIF_F_TSO6;
2567                                         break;
2568                                 case SPEED_1000:
2569                                         netdev->features |= NETIF_F_TSO;
2570                                         netdev->features |= NETIF_F_TSO6;
2571                                         break;
2572                                 default:
2573                                         /* oops */
2574                                         break;
2575                                 }
2576                         }
2577
2578                         /* enable transmits in the hardware, need to do this
2579                          * after setting TARC0 */
2580                         tctl = er32(TCTL);
2581                         tctl |= E1000_TCTL_EN;
2582                         ew32(TCTL, tctl);
2583
2584                         netif_carrier_on(netdev);
2585                         netif_wake_queue(netdev);
2586                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2587                         adapter->smartspeed = 0;
2588                 } else {
2589                         /* make sure the receive unit is started */
2590                         if (hw->rx_needs_kicking) {
2591                                 u32 rctl = er32(RCTL);
2592                                 ew32(RCTL, rctl | E1000_RCTL_EN);
2593                         }
2594                 }
2595         } else {
2596                 if (netif_carrier_ok(netdev)) {
2597                         adapter->link_speed = 0;
2598                         adapter->link_duplex = 0;
2599                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2600                         netif_carrier_off(netdev);
2601                         netif_stop_queue(netdev);
2602                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2603
2604                         /* 80003ES2LAN workaround--
2605                          * For packet buffer work-around on link down event;
2606                          * disable receives in the ISR and
2607                          * reset device here in the watchdog
2608                          */
2609                         if (hw->mac_type == e1000_80003es2lan)
2610                                 /* reset device */
2611                                 schedule_work(&adapter->reset_task);
2612                 }
2613
2614                 e1000_smartspeed(adapter);
2615         }
2616
2617         e1000_update_stats(adapter);
2618
2619         hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2620         adapter->tpt_old = adapter->stats.tpt;
2621         hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2622         adapter->colc_old = adapter->stats.colc;
2623
2624         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2625         adapter->gorcl_old = adapter->stats.gorcl;
2626         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2627         adapter->gotcl_old = adapter->stats.gotcl;
2628
2629         e1000_update_adaptive(hw);
2630
2631         if (!netif_carrier_ok(netdev)) {
2632                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2633                         /* We've lost link, so the controller stops DMA,
2634                          * but we've got queued Tx work that's never going
2635                          * to get done, so reset controller to flush Tx.
2636                          * (Do the reset outside of interrupt context). */
2637                         adapter->tx_timeout_count++;
2638                         schedule_work(&adapter->reset_task);
2639                 }
2640         }
2641
2642         /* Cause software interrupt to ensure rx ring is cleaned */
2643         ew32(ICS, E1000_ICS_RXDMT0);
2644
2645         /* Force detection of hung controller every watchdog period */
2646         adapter->detect_tx_hung = true;
2647
2648         /* With 82571 controllers, LAA may be overwritten due to controller
2649          * reset from the other port. Set the appropriate LAA in RAR[0] */
2650         if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2651                 e1000_rar_set(hw, hw->mac_addr, 0);
2652
2653         /* Reset the timer */
2654         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2655 }
2656
2657 enum latency_range {
2658         lowest_latency = 0,
2659         low_latency = 1,
2660         bulk_latency = 2,
2661         latency_invalid = 255
2662 };
2663
2664 /**
2665  * e1000_update_itr - update the dynamic ITR value based on statistics
2666  *      Stores a new ITR value based on packets and byte
2667  *      counts during the last interrupt.  The advantage of per interrupt
2668  *      computation is faster updates and more accurate ITR for the current
2669  *      traffic pattern.  Constants in this function were computed
2670  *      based on theoretical maximum wire speed and thresholds were set based
2671  *      on testing data as well as attempting to minimize response time
2672  *      while increasing bulk throughput.
2673  *      this functionality is controlled by the InterruptThrottleRate module
2674  *      parameter (see e1000_param.c)
2675  * @adapter: pointer to adapter
2676  * @itr_setting: current adapter->itr
2677  * @packets: the number of packets during this measurement interval
2678  * @bytes: the number of bytes during this measurement interval
2679  **/
2680 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2681                                      u16 itr_setting, int packets, int bytes)
2682 {
2683         unsigned int retval = itr_setting;
2684         struct e1000_hw *hw = &adapter->hw;
2685
2686         if (unlikely(hw->mac_type < e1000_82540))
2687                 goto update_itr_done;
2688
2689         if (packets == 0)
2690                 goto update_itr_done;
2691
2692         switch (itr_setting) {
2693         case lowest_latency:
2694                 /* jumbo frames get bulk treatment*/
2695                 if (bytes/packets > 8000)
2696                         retval = bulk_latency;
2697                 else if ((packets < 5) && (bytes > 512))
2698                         retval = low_latency;
2699                 break;
2700         case low_latency:  /* 50 usec aka 20000 ints/s */
2701                 if (bytes > 10000) {
2702                         /* jumbo frames need bulk latency setting */
2703                         if (bytes/packets > 8000)
2704                                 retval = bulk_latency;
2705                         else if ((packets < 10) || ((bytes/packets) > 1200))
2706                                 retval = bulk_latency;
2707                         else if ((packets > 35))
2708                                 retval = lowest_latency;
2709                 } else if (bytes/packets > 2000)
2710                         retval = bulk_latency;
2711                 else if (packets <= 2 && bytes < 512)
2712                         retval = lowest_latency;
2713                 break;
2714         case bulk_latency: /* 250 usec aka 4000 ints/s */
2715                 if (bytes > 25000) {
2716                         if (packets > 35)
2717                                 retval = low_latency;
2718                 } else if (bytes < 6000) {
2719                         retval = low_latency;
2720                 }
2721                 break;
2722         }
2723
2724 update_itr_done:
2725         return retval;
2726 }
2727
2728 static void e1000_set_itr(struct e1000_adapter *adapter)
2729 {
2730         struct e1000_hw *hw = &adapter->hw;
2731         u16 current_itr;
2732         u32 new_itr = adapter->itr;
2733
2734         if (unlikely(hw->mac_type < e1000_82540))
2735                 return;
2736
2737         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2738         if (unlikely(adapter->link_speed != SPEED_1000)) {
2739                 current_itr = 0;
2740                 new_itr = 4000;
2741                 goto set_itr_now;
2742         }
2743
2744         adapter->tx_itr = e1000_update_itr(adapter,
2745                                     adapter->tx_itr,
2746                                     adapter->total_tx_packets,
2747                                     adapter->total_tx_bytes);
2748         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2749         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2750                 adapter->tx_itr = low_latency;
2751
2752         adapter->rx_itr = e1000_update_itr(adapter,
2753                                     adapter->rx_itr,
2754                                     adapter->total_rx_packets,
2755                                     adapter->total_rx_bytes);
2756         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2757         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2758                 adapter->rx_itr = low_latency;
2759
2760         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2761
2762         switch (current_itr) {
2763         /* counts and packets in update_itr are dependent on these numbers */
2764         case lowest_latency:
2765                 new_itr = 70000;
2766                 break;
2767         case low_latency:
2768                 new_itr = 20000; /* aka hwitr = ~200 */
2769                 break;
2770         case bulk_latency:
2771                 new_itr = 4000;
2772                 break;
2773         default:
2774                 break;
2775         }
2776
2777 set_itr_now:
2778         if (new_itr != adapter->itr) {
2779                 /* this attempts to bias the interrupt rate towards Bulk
2780                  * by adding intermediate steps when interrupt rate is
2781                  * increasing */
2782                 new_itr = new_itr > adapter->itr ?
2783                              min(adapter->itr + (new_itr >> 2), new_itr) :
2784                              new_itr;
2785                 adapter->itr = new_itr;
2786                 ew32(ITR, 1000000000 / (new_itr * 256));
2787         }
2788
2789         return;
2790 }
2791
2792 #define E1000_TX_FLAGS_CSUM             0x00000001
2793 #define E1000_TX_FLAGS_VLAN             0x00000002
2794 #define E1000_TX_FLAGS_TSO              0x00000004
2795 #define E1000_TX_FLAGS_IPV4             0x00000008
2796 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2797 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2798
2799 static int e1000_tso(struct e1000_adapter *adapter,
2800                      struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2801 {
2802         struct e1000_context_desc *context_desc;
2803         struct e1000_buffer *buffer_info;
2804         unsigned int i;
2805         u32 cmd_length = 0;
2806         u16 ipcse = 0, tucse, mss;
2807         u8 ipcss, ipcso, tucss, tucso, hdr_len;
2808         int err;
2809
2810         if (skb_is_gso(skb)) {
2811                 if (skb_header_cloned(skb)) {
2812                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2813                         if (err)
2814                                 return err;
2815                 }
2816
2817                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2818                 mss = skb_shinfo(skb)->gso_size;
2819                 if (skb->protocol == htons(ETH_P_IP)) {
2820                         struct iphdr *iph = ip_hdr(skb);
2821                         iph->tot_len = 0;
2822                         iph->check = 0;
2823                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2824                                                                  iph->daddr, 0,
2825                                                                  IPPROTO_TCP,
2826                                                                  0);
2827                         cmd_length = E1000_TXD_CMD_IP;
2828                         ipcse = skb_transport_offset(skb) - 1;
2829                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2830                         ipv6_hdr(skb)->payload_len = 0;
2831                         tcp_hdr(skb)->check =
2832                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2833                                                  &ipv6_hdr(skb)->daddr,
2834                                                  0, IPPROTO_TCP, 0);
2835                         ipcse = 0;
2836                 }
2837                 ipcss = skb_network_offset(skb);
2838                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2839                 tucss = skb_transport_offset(skb);
2840                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2841                 tucse = 0;
2842
2843                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2844                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2845
2846                 i = tx_ring->next_to_use;
2847                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2848                 buffer_info = &tx_ring->buffer_info[i];
2849
2850                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2851                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2852                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2853                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2854                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2855                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2856                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2857                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2858                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2859
2860                 buffer_info->time_stamp = jiffies;
2861                 buffer_info->next_to_watch = i;
2862
2863                 if (++i == tx_ring->count) i = 0;
2864                 tx_ring->next_to_use = i;
2865
2866                 return true;
2867         }
2868         return false;
2869 }
2870
2871 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2872                           struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2873 {
2874         struct e1000_context_desc *context_desc;
2875         struct e1000_buffer *buffer_info;
2876         unsigned int i;
2877         u8 css;
2878         u32 cmd_len = E1000_TXD_CMD_DEXT;
2879
2880         if (skb->ip_summed != CHECKSUM_PARTIAL)
2881                 return false;
2882
2883         switch (skb->protocol) {
2884         case __constant_htons(ETH_P_IP):
2885                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2886                         cmd_len |= E1000_TXD_CMD_TCP;
2887                 break;
2888         case __constant_htons(ETH_P_IPV6):
2889                 /* XXX not handling all IPV6 headers */
2890                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2891                         cmd_len |= E1000_TXD_CMD_TCP;
2892                 break;
2893         default:
2894                 if (unlikely(net_ratelimit()))
2895                         DPRINTK(DRV, WARNING,
2896                                 "checksum_partial proto=%x!\n", skb->protocol);
2897                 break;
2898         }
2899
2900         css = skb_transport_offset(skb);
2901
2902         i = tx_ring->next_to_use;
2903         buffer_info = &tx_ring->buffer_info[i];
2904         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2905
2906         context_desc->lower_setup.ip_config = 0;
2907         context_desc->upper_setup.tcp_fields.tucss = css;
2908         context_desc->upper_setup.tcp_fields.tucso =
2909                 css + skb->csum_offset;
2910         context_desc->upper_setup.tcp_fields.tucse = 0;
2911         context_desc->tcp_seg_setup.data = 0;
2912         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2913
2914         buffer_info->time_stamp = jiffies;
2915         buffer_info->next_to_watch = i;
2916
2917         if (unlikely(++i == tx_ring->count)) i = 0;
2918         tx_ring->next_to_use = i;
2919
2920         return true;
2921 }
2922
2923 #define E1000_MAX_TXD_PWR       12
2924 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2925
2926 static int e1000_tx_map(struct e1000_adapter *adapter,
2927                         struct e1000_tx_ring *tx_ring,
2928                         struct sk_buff *skb, unsigned int first,
2929                         unsigned int max_per_txd, unsigned int nr_frags,
2930                         unsigned int mss)
2931 {
2932         struct e1000_hw *hw = &adapter->hw;
2933         struct e1000_buffer *buffer_info;
2934         unsigned int len = skb->len;
2935         unsigned int offset = 0, size, count = 0, i;
2936         unsigned int f;
2937         len -= skb->data_len;
2938
2939         i = tx_ring->next_to_use;
2940
2941         while (len) {
2942                 buffer_info = &tx_ring->buffer_info[i];
2943                 size = min(len, max_per_txd);
2944                 /* Workaround for Controller erratum --
2945                  * descriptor for non-tso packet in a linear SKB that follows a
2946                  * tso gets written back prematurely before the data is fully
2947                  * DMA'd to the controller */
2948                 if (!skb->data_len && tx_ring->last_tx_tso &&
2949                     !skb_is_gso(skb)) {
2950                         tx_ring->last_tx_tso = 0;
2951                         size -= 4;
2952                 }
2953
2954                 /* Workaround for premature desc write-backs
2955                  * in TSO mode.  Append 4-byte sentinel desc */
2956                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2957                         size -= 4;
2958                 /* work-around for errata 10 and it applies
2959                  * to all controllers in PCI-X mode
2960                  * The fix is to make sure that the first descriptor of a
2961                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2962                  */
2963                 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2964                                 (size > 2015) && count == 0))
2965                         size = 2015;
2966
2967                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2968                  * terminating buffers within evenly-aligned dwords. */
2969                 if (unlikely(adapter->pcix_82544 &&
2970                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2971                    size > 4))
2972                         size -= 4;
2973
2974                 buffer_info->length = size;
2975                 buffer_info->dma =
2976                         pci_map_single(adapter->pdev,
2977                                 skb->data + offset,
2978                                 size,
2979                                 PCI_DMA_TODEVICE);
2980                 buffer_info->time_stamp = jiffies;
2981                 buffer_info->next_to_watch = i;
2982
2983                 len -= size;
2984                 offset += size;
2985                 count++;
2986                 if (unlikely(++i == tx_ring->count)) i = 0;
2987         }
2988
2989         for (f = 0; f < nr_frags; f++) {
2990                 struct skb_frag_struct *frag;
2991
2992                 frag = &skb_shinfo(skb)->frags[f];
2993                 len = frag->size;
2994                 offset = frag->page_offset;
2995
2996                 while (len) {
2997                         buffer_info = &tx_ring->buffer_info[i];
2998                         size = min(len, max_per_txd);
2999                         /* Workaround for premature desc write-backs
3000                          * in TSO mode.  Append 4-byte sentinel desc */
3001                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3002                                 size -= 4;
3003                         /* Workaround for potential 82544 hang in PCI-X.
3004                          * Avoid terminating buffers within evenly-aligned
3005                          * dwords. */
3006                         if (unlikely(adapter->pcix_82544 &&
3007                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3008                            size > 4))
3009                                 size -= 4;
3010
3011                         buffer_info->length = size;
3012                         buffer_info->dma =
3013                                 pci_map_page(adapter->pdev,
3014                                         frag->page,
3015                                         offset,
3016                                         size,
3017                                         PCI_DMA_TODEVICE);
3018                         buffer_info->time_stamp = jiffies;
3019                         buffer_info->next_to_watch = i;
3020
3021                         len -= size;
3022                         offset += size;
3023                         count++;
3024                         if (unlikely(++i == tx_ring->count)) i = 0;
3025                 }
3026         }
3027
3028         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3029         tx_ring->buffer_info[i].skb = skb;
3030         tx_ring->buffer_info[first].next_to_watch = i;
3031
3032         return count;
3033 }
3034
3035 static void e1000_tx_queue(struct e1000_adapter *adapter,
3036                            struct e1000_tx_ring *tx_ring, int tx_flags,
3037                            int count)
3038 {
3039         struct e1000_hw *hw = &adapter->hw;
3040         struct e1000_tx_desc *tx_desc = NULL;
3041         struct e1000_buffer *buffer_info;
3042         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3043         unsigned int i;
3044
3045         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3046                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3047                              E1000_TXD_CMD_TSE;
3048                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3049
3050                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3051                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3052         }
3053
3054         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3055                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3056                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3057         }
3058
3059         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3060                 txd_lower |= E1000_TXD_CMD_VLE;
3061                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3062         }
3063
3064         i = tx_ring->next_to_use;
3065
3066         while (count--) {
3067                 buffer_info = &tx_ring->buffer_info[i];
3068                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3069                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3070                 tx_desc->lower.data =
3071                         cpu_to_le32(txd_lower | buffer_info->length);
3072                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3073                 if (unlikely(++i == tx_ring->count)) i = 0;
3074         }
3075
3076         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3077
3078         /* Force memory writes to complete before letting h/w
3079          * know there are new descriptors to fetch.  (Only
3080          * applicable for weak-ordered memory model archs,
3081          * such as IA-64). */
3082         wmb();
3083
3084         tx_ring->next_to_use = i;
3085         writel(i, hw->hw_addr + tx_ring->tdt);
3086         /* we need this if more than one processor can write to our tail
3087          * at a time, it syncronizes IO on IA64/Altix systems */
3088         mmiowb();
3089 }
3090
3091 /**
3092  * 82547 workaround to avoid controller hang in half-duplex environment.
3093  * The workaround is to avoid queuing a large packet that would span
3094  * the internal Tx FIFO ring boundary by notifying the stack to resend
3095  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3096  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3097  * to the beginning of the Tx FIFO.
3098  **/
3099
3100 #define E1000_FIFO_HDR                  0x10
3101 #define E1000_82547_PAD_LEN             0x3E0
3102
3103 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3104                                        struct sk_buff *skb)
3105 {
3106         u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3107         u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3108
3109         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3110
3111         if (adapter->link_duplex != HALF_DUPLEX)
3112                 goto no_fifo_stall_required;
3113
3114         if (atomic_read(&adapter->tx_fifo_stall))
3115                 return 1;
3116
3117         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3118                 atomic_set(&adapter->tx_fifo_stall, 1);
3119                 return 1;
3120         }
3121
3122 no_fifo_stall_required:
3123         adapter->tx_fifo_head += skb_fifo_len;
3124         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3125                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3126         return 0;
3127 }
3128
3129 #define MINIMUM_DHCP_PACKET_SIZE 282
3130 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3131                                     struct sk_buff *skb)
3132 {
3133         struct e1000_hw *hw =  &adapter->hw;
3134         u16 length, offset;
3135         if (vlan_tx_tag_present(skb)) {
3136                 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3137                         ( hw->mng_cookie.status &
3138                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3139                         return 0;
3140         }
3141         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3142                 struct ethhdr *eth = (struct ethhdr *)skb->data;
3143                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3144                         const struct iphdr *ip =
3145                                 (struct iphdr *)((u8 *)skb->data+14);
3146                         if (IPPROTO_UDP == ip->protocol) {
3147                                 struct udphdr *udp =
3148                                         (struct udphdr *)((u8 *)ip +
3149                                                 (ip->ihl << 2));
3150                                 if (ntohs(udp->dest) == 67) {
3151                                         offset = (u8 *)udp + 8 - skb->data;
3152                                         length = skb->len - offset;
3153
3154                                         return e1000_mng_write_dhcp_info(hw,
3155                                                         (u8 *)udp + 8,
3156                                                         length);
3157                                 }
3158                         }
3159                 }
3160         }
3161         return 0;
3162 }
3163
3164 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3165 {
3166         struct e1000_adapter *adapter = netdev_priv(netdev);
3167         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3168
3169         netif_stop_queue(netdev);
3170         /* Herbert's original patch had:
3171          *  smp_mb__after_netif_stop_queue();
3172          * but since that doesn't exist yet, just open code it. */
3173         smp_mb();
3174
3175         /* We need to check again in a case another CPU has just
3176          * made room available. */
3177         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3178                 return -EBUSY;
3179
3180         /* A reprieve! */
3181         netif_start_queue(netdev);
3182         ++adapter->restart_queue;
3183         return 0;
3184 }
3185
3186 static int e1000_maybe_stop_tx(struct net_device *netdev,
3187                                struct e1000_tx_ring *tx_ring, int size)
3188 {
3189         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3190                 return 0;
3191         return __e1000_maybe_stop_tx(netdev, size);
3192 }
3193
3194 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3195 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3196 {
3197         struct e1000_adapter *adapter = netdev_priv(netdev);
3198         struct e1000_hw *hw = &adapter->hw;
3199         struct e1000_tx_ring *tx_ring;
3200         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3201         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3202         unsigned int tx_flags = 0;
3203         unsigned int len = skb->len - skb->data_len;
3204         unsigned long flags;
3205         unsigned int nr_frags;
3206         unsigned int mss;
3207         int count = 0;
3208         int tso;
3209         unsigned int f;
3210
3211         /* This goes back to the question of how to logically map a tx queue
3212          * to a flow.  Right now, performance is impacted slightly negatively
3213          * if using multiple tx queues.  If the stack breaks away from a
3214          * single qdisc implementation, we can look at this again. */
3215         tx_ring = adapter->tx_ring;
3216
3217         if (unlikely(skb->len <= 0)) {
3218                 dev_kfree_skb_any(skb);
3219                 return NETDEV_TX_OK;
3220         }
3221
3222         /* 82571 and newer doesn't need the workaround that limited descriptor
3223          * length to 4kB */
3224         if (hw->mac_type >= e1000_82571)
3225                 max_per_txd = 8192;
3226
3227         mss = skb_shinfo(skb)->gso_size;
3228         /* The controller does a simple calculation to
3229          * make sure there is enough room in the FIFO before
3230          * initiating the DMA for each buffer.  The calc is:
3231          * 4 = ceil(buffer len/mss).  To make sure we don't
3232          * overrun the FIFO, adjust the max buffer len if mss
3233          * drops. */
3234         if (mss) {
3235                 u8 hdr_len;
3236                 max_per_txd = min(mss << 2, max_per_txd);
3237                 max_txd_pwr = fls(max_per_txd) - 1;
3238
3239                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3240                 * points to just header, pull a few bytes of payload from
3241                 * frags into skb->data */
3242                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3243                 if (skb->data_len && hdr_len == len) {
3244                         switch (hw->mac_type) {
3245                                 unsigned int pull_size;
3246                         case e1000_82544:
3247                                 /* Make sure we have room to chop off 4 bytes,
3248                                  * and that the end alignment will work out to
3249                                  * this hardware's requirements
3250                                  * NOTE: this is a TSO only workaround
3251                                  * if end byte alignment not correct move us
3252                                  * into the next dword */
3253                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3254                                         break;
3255                                 /* fall through */
3256                         case e1000_82571:
3257                         case e1000_82572:
3258                         case e1000_82573:
3259                         case e1000_ich8lan:
3260                                 pull_size = min((unsigned int)4, skb->data_len);
3261                                 if (!__pskb_pull_tail(skb, pull_size)) {
3262                                         DPRINTK(DRV, ERR,
3263                                                 "__pskb_pull_tail failed.\n");
3264                                         dev_kfree_skb_any(skb);
3265                                         return NETDEV_TX_OK;
3266                                 }
3267                                 len = skb->len - skb->data_len;
3268                                 break;
3269                         default:
3270                                 /* do nothing */
3271                                 break;
3272                         }
3273                 }
3274         }
3275
3276         /* reserve a descriptor for the offload context */
3277         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3278                 count++;
3279         count++;
3280
3281         /* Controller Erratum workaround */
3282         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3283                 count++;
3284
3285         count += TXD_USE_COUNT(len, max_txd_pwr);
3286
3287         if (adapter->pcix_82544)
3288                 count++;
3289
3290         /* work-around for errata 10 and it applies to all controllers
3291          * in PCI-X mode, so add one more descriptor to the count
3292          */
3293         if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3294                         (len > 2015)))
3295                 count++;
3296
3297         nr_frags = skb_shinfo(skb)->nr_frags;
3298         for (f = 0; f < nr_frags; f++)
3299                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3300                                        max_txd_pwr);
3301         if (adapter->pcix_82544)
3302                 count += nr_frags;
3303
3304
3305         if (hw->tx_pkt_filtering &&
3306             (hw->mac_type == e1000_82573))
3307                 e1000_transfer_dhcp_info(adapter, skb);
3308
3309         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3310                 /* Collision - tell upper layer to requeue */
3311                 return NETDEV_TX_LOCKED;
3312
3313         /* need: count + 2 desc gap to keep tail from touching
3314          * head, otherwise try next time */
3315         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3316                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3317                 return NETDEV_TX_BUSY;
3318         }
3319
3320         if (unlikely(hw->mac_type == e1000_82547)) {
3321                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3322                         netif_stop_queue(netdev);
3323                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3324                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3325                         return NETDEV_TX_BUSY;
3326                 }
3327         }
3328
3329         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3330                 tx_flags |= E1000_TX_FLAGS_VLAN;
3331                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3332         }
3333
3334         first = tx_ring->next_to_use;
3335
3336         tso = e1000_tso(adapter, tx_ring, skb);
3337         if (tso < 0) {
3338                 dev_kfree_skb_any(skb);
3339                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3340                 return NETDEV_TX_OK;
3341         }
3342
3343         if (likely(tso)) {
3344                 tx_ring->last_tx_tso = 1;
3345                 tx_flags |= E1000_TX_FLAGS_TSO;
3346         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3347                 tx_flags |= E1000_TX_FLAGS_CSUM;
3348
3349         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3350          * 82571 hardware supports TSO capabilities for IPv6 as well...
3351          * no longer assume, we must. */
3352         if (likely(skb->protocol == htons(ETH_P_IP)))
3353                 tx_flags |= E1000_TX_FLAGS_IPV4;
3354
3355         e1000_tx_queue(adapter, tx_ring, tx_flags,
3356                        e1000_tx_map(adapter, tx_ring, skb, first,
3357                                     max_per_txd, nr_frags, mss));
3358
3359         netdev->trans_start = jiffies;
3360
3361         /* Make sure there is space in the ring for the next send. */
3362         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3363
3364         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3365         return NETDEV_TX_OK;
3366 }
3367
3368 /**
3369  * e1000_tx_timeout - Respond to a Tx Hang
3370  * @netdev: network interface device structure
3371  **/
3372
3373 static void e1000_tx_timeout(struct net_device *netdev)
3374 {
3375         struct e1000_adapter *adapter = netdev_priv(netdev);
3376
3377         /* Do the reset outside of interrupt context */
3378         adapter->tx_timeout_count++;
3379         schedule_work(&adapter->reset_task);
3380 }
3381
3382 static void e1000_reset_task(struct work_struct *work)
3383 {
3384         struct e1000_adapter *adapter =
3385                 container_of(work, struct e1000_adapter, reset_task);
3386
3387         e1000_reinit_locked(adapter);
3388 }
3389
3390 /**
3391  * e1000_get_stats - Get System Network Statistics
3392  * @netdev: network interface device structure
3393  *
3394  * Returns the address of the device statistics structure.
3395  * The statistics are actually updated from the timer callback.
3396  **/
3397
3398 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3399 {
3400         struct e1000_adapter *adapter = netdev_priv(netdev);
3401
3402         /* only return the current stats */
3403         return &adapter->net_stats;
3404 }
3405
3406 /**
3407  * e1000_change_mtu - Change the Maximum Transfer Unit
3408  * @netdev: network interface device structure
3409  * @new_mtu: new value for maximum frame size
3410  *
3411  * Returns 0 on success, negative on failure
3412  **/
3413
3414 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3415 {
3416         struct e1000_adapter *adapter = netdev_priv(netdev);
3417         struct e1000_hw *hw = &adapter->hw;
3418         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3419         u16 eeprom_data = 0;
3420
3421         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3422             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3423                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3424                 return -EINVAL;
3425         }
3426
3427         /* Adapter-specific max frame size limits. */
3428         switch (hw->mac_type) {
3429         case e1000_undefined ... e1000_82542_rev2_1:
3430         case e1000_ich8lan:
3431                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3432                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3433                         return -EINVAL;
3434                 }
3435                 break;
3436         case e1000_82573:
3437                 /* Jumbo Frames not supported if:
3438                  * - this is not an 82573L device
3439                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3440                 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3441                                   &eeprom_data);
3442                 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3443                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3444                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3445                                 DPRINTK(PROBE, ERR,
3446                                         "Jumbo Frames not supported.\n");
3447                                 return -EINVAL;
3448                         }
3449                         break;
3450                 }
3451                 /* ERT will be enabled later to enable wire speed receives */
3452
3453                 /* fall through to get support */
3454         case e1000_82571:
3455         case e1000_82572:
3456         case e1000_80003es2lan:
3457 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3458                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3459                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3460                         return -EINVAL;
3461                 }
3462                 break;
3463         default:
3464                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3465                 break;
3466         }
3467
3468         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3469          * means we reserve 2 more, this pushes us to allocate from the next
3470          * larger slab size
3471          * i.e. RXBUFFER_2048 --> size-4096 slab */
3472
3473         if (max_frame <= E1000_RXBUFFER_256)
3474                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3475         else if (max_frame <= E1000_RXBUFFER_512)
3476                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3477         else if (max_frame <= E1000_RXBUFFER_1024)
3478                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3479         else if (max_frame <= E1000_RXBUFFER_2048)
3480                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3481         else if (max_frame <= E1000_RXBUFFER_4096)
3482                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3483         else if (max_frame <= E1000_RXBUFFER_8192)
3484                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3485         else if (max_frame <= E1000_RXBUFFER_16384)
3486                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3487
3488         /* adjust allocation if LPE protects us, and we aren't using SBP */
3489         if (!hw->tbi_compatibility_on &&
3490             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3491              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3492                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3493
3494         netdev->mtu = new_mtu;
3495         hw->max_frame_size = max_frame;
3496
3497         if (netif_running(netdev))
3498                 e1000_reinit_locked(adapter);
3499
3500         return 0;
3501 }
3502
3503 /**
3504  * e1000_update_stats - Update the board statistics counters
3505  * @adapter: board private structure
3506  **/
3507
3508 void e1000_update_stats(struct e1000_adapter *adapter)
3509 {
3510         struct e1000_hw *hw = &adapter->hw;
3511         struct pci_dev *pdev = adapter->pdev;
3512         unsigned long flags;
3513         u16 phy_tmp;
3514
3515 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3516
3517         /*
3518          * Prevent stats update while adapter is being reset, or if the pci
3519          * connection is down.
3520          */
3521         if (adapter->link_speed == 0)
3522                 return;
3523         if (pci_channel_offline(pdev))
3524                 return;
3525
3526         spin_lock_irqsave(&adapter->stats_lock, flags);
3527
3528         /* these counters are modified from e1000_tbi_adjust_stats,
3529          * called from the interrupt context, so they must only
3530          * be written while holding adapter->stats_lock
3531          */
3532
3533         adapter->stats.crcerrs += er32(CRCERRS);
3534         adapter->stats.gprc += er32(GPRC);
3535         adapter->stats.gorcl += er32(GORCL);
3536         adapter->stats.gorch += er32(GORCH);
3537         adapter->stats.bprc += er32(BPRC);
3538         adapter->stats.mprc += er32(MPRC);
3539         adapter->stats.roc += er32(ROC);
3540
3541         if (hw->mac_type != e1000_ich8lan) {
3542                 adapter->stats.prc64 += er32(PRC64);
3543                 adapter->stats.prc127 += er32(PRC127);
3544                 adapter->stats.prc255 += er32(PRC255);
3545                 adapter->stats.prc511 += er32(PRC511);
3546                 adapter->stats.prc1023 += er32(PRC1023);
3547                 adapter->stats.prc1522 += er32(PRC1522);
3548         }
3549
3550         adapter->stats.symerrs += er32(SYMERRS);
3551         adapter->stats.mpc += er32(MPC);
3552         adapter->stats.scc += er32(SCC);
3553         adapter->stats.ecol += er32(ECOL);
3554         adapter->stats.mcc += er32(MCC);
3555         adapter->stats.latecol += er32(LATECOL);
3556         adapter->stats.dc += er32(DC);
3557         adapter->stats.sec += er32(SEC);
3558         adapter->stats.rlec += er32(RLEC);
3559         adapter->stats.xonrxc += er32(XONRXC);
3560         adapter->stats.xontxc += er32(XONTXC);
3561         adapter->stats.xoffrxc += er32(XOFFRXC);
3562         adapter->stats.xofftxc += er32(XOFFTXC);
3563         adapter->stats.fcruc += er32(FCRUC);
3564         adapter->stats.gptc += er32(GPTC);
3565         adapter->stats.gotcl += er32(GOTCL);
3566         adapter->stats.gotch += er32(GOTCH);
3567         adapter->stats.rnbc += er32(RNBC);
3568         adapter->stats.ruc += er32(RUC);
3569         adapter->stats.rfc += er32(RFC);
3570         adapter->stats.rjc += er32(RJC);
3571         adapter->stats.torl += er32(TORL);
3572         adapter->stats.torh += er32(TORH);
3573         adapter->stats.totl += er32(TOTL);
3574         adapter->stats.toth += er32(TOTH);
3575         adapter->stats.tpr += er32(TPR);
3576
3577         if (hw->mac_type != e1000_ich8lan) {
3578                 adapter->stats.ptc64 += er32(PTC64);
3579                 adapter->stats.ptc127 += er32(PTC127);
3580                 adapter->stats.ptc255 += er32(PTC255);
3581                 adapter->stats.ptc511 += er32(PTC511);
3582                 adapter->stats.ptc1023 += er32(PTC1023);
3583                 adapter->stats.ptc1522 += er32(PTC1522);
3584         }
3585
3586         adapter->stats.mptc += er32(MPTC);
3587         adapter->stats.bptc += er32(BPTC);
3588
3589         /* used for adaptive IFS */
3590
3591         hw->tx_packet_delta = er32(TPT);
3592         adapter->stats.tpt += hw->tx_packet_delta;
3593         hw->collision_delta = er32(COLC);
3594         adapter->stats.colc += hw->collision_delta;
3595
3596         if (hw->mac_type >= e1000_82543) {
3597                 adapter->stats.algnerrc += er32(ALGNERRC);
3598                 adapter->stats.rxerrc += er32(RXERRC);
3599                 adapter->stats.tncrs += er32(TNCRS);
3600                 adapter->stats.cexterr += er32(CEXTERR);
3601                 adapter->stats.tsctc += er32(TSCTC);
3602                 adapter->stats.tsctfc += er32(TSCTFC);
3603         }
3604         if (hw->mac_type > e1000_82547_rev_2) {
3605                 adapter->stats.iac += er32(IAC);
3606                 adapter->stats.icrxoc += er32(ICRXOC);
3607
3608                 if (hw->mac_type != e1000_ich8lan) {
3609                         adapter->stats.icrxptc += er32(ICRXPTC);
3610                         adapter->stats.icrxatc += er32(ICRXATC);
3611                         adapter->stats.ictxptc += er32(ICTXPTC);
3612                         adapter->stats.ictxatc += er32(ICTXATC);
3613                         adapter->stats.ictxqec += er32(ICTXQEC);
3614                         adapter->stats.ictxqmtc += er32(ICTXQMTC);
3615                         adapter->stats.icrxdmtc += er32(ICRXDMTC);
3616                 }
3617         }
3618
3619         /* Fill out the OS statistics structure */
3620         adapter->net_stats.multicast = adapter->stats.mprc;
3621         adapter->net_stats.collisions = adapter->stats.colc;
3622
3623         /* Rx Errors */
3624
3625         /* RLEC on some newer hardware can be incorrect so build
3626         * our own version based on RUC and ROC */
3627         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3628                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3629                 adapter->stats.ruc + adapter->stats.roc +
3630                 adapter->stats.cexterr;
3631         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3632         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3633         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3634         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3635         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3636
3637         /* Tx Errors */
3638         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3639         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3640         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3641         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3642         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3643         if (hw->bad_tx_carr_stats_fd &&
3644             adapter->link_duplex == FULL_DUPLEX) {
3645                 adapter->net_stats.tx_carrier_errors = 0;
3646                 adapter->stats.tncrs = 0;
3647         }
3648
3649         /* Tx Dropped needs to be maintained elsewhere */
3650
3651         /* Phy Stats */
3652         if (hw->media_type == e1000_media_type_copper) {
3653                 if ((adapter->link_speed == SPEED_1000) &&
3654                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3655                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3656                         adapter->phy_stats.idle_errors += phy_tmp;
3657                 }
3658
3659                 if ((hw->mac_type <= e1000_82546) &&
3660                    (hw->phy_type == e1000_phy_m88) &&
3661                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3662                         adapter->phy_stats.receive_errors += phy_tmp;
3663         }
3664
3665         /* Management Stats */
3666         if (hw->has_smbus) {
3667                 adapter->stats.mgptc += er32(MGTPTC);
3668                 adapter->stats.mgprc += er32(MGTPRC);
3669                 adapter->stats.mgpdc += er32(MGTPDC);
3670         }
3671
3672         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3673 }
3674
3675 /**
3676  * e1000_intr_msi - Interrupt Handler
3677  * @irq: interrupt number
3678  * @data: pointer to a network interface device structure
3679  **/
3680
3681 static irqreturn_t e1000_intr_msi(int irq, void *data)
3682 {
3683         struct net_device *netdev = data;
3684         struct e1000_adapter *adapter = netdev_priv(netdev);
3685         struct e1000_hw *hw = &adapter->hw;
3686         u32 icr = er32(ICR);
3687
3688         /* in NAPI mode read ICR disables interrupts using IAM */
3689
3690         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3691                 hw->get_link_status = 1;
3692                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3693                  * link down event; disable receives here in the ISR and reset
3694                  * adapter in watchdog */
3695                 if (netif_carrier_ok(netdev) &&
3696                     (hw->mac_type == e1000_80003es2lan)) {
3697                         /* disable receives */
3698                         u32 rctl = er32(RCTL);
3699                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3700                 }
3701                 /* guard against interrupt when we're going down */
3702                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3703                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3704         }
3705
3706         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3707                 adapter->total_tx_bytes = 0;
3708                 adapter->total_tx_packets = 0;
3709                 adapter->total_rx_bytes = 0;
3710                 adapter->total_rx_packets = 0;
3711                 __netif_rx_schedule(netdev, &adapter->napi);
3712         } else
3713                 e1000_irq_enable(adapter);
3714
3715         return IRQ_HANDLED;
3716 }
3717
3718 /**
3719  * e1000_intr - Interrupt Handler
3720  * @irq: interrupt number
3721  * @data: pointer to a network interface device structure
3722  **/
3723
3724 static irqreturn_t e1000_intr(int irq, void *data)
3725 {
3726         struct net_device *netdev = data;
3727         struct e1000_adapter *adapter = netdev_priv(netdev);
3728         struct e1000_hw *hw = &adapter->hw;
3729         u32 rctl, icr = er32(ICR);
3730
3731         if (unlikely(!icr))
3732                 return IRQ_NONE;  /* Not our interrupt */
3733
3734         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3735          * not set, then the adapter didn't send an interrupt */
3736         if (unlikely(hw->mac_type >= e1000_82571 &&
3737                      !(icr & E1000_ICR_INT_ASSERTED)))
3738                 return IRQ_NONE;
3739
3740         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3741          * need for the IMC write */
3742
3743         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3744                 hw->get_link_status = 1;
3745                 /* 80003ES2LAN workaround--
3746                  * For packet buffer work-around on link down event;
3747                  * disable receives here in the ISR and
3748                  * reset adapter in watchdog
3749                  */
3750                 if (netif_carrier_ok(netdev) &&
3751                     (hw->mac_type == e1000_80003es2lan)) {
3752                         /* disable receives */
3753                         rctl = er32(RCTL);
3754                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3755                 }
3756                 /* guard against interrupt when we're going down */
3757                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3758                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3759         }
3760
3761         if (unlikely(hw->mac_type < e1000_82571)) {
3762                 /* disable interrupts, without the synchronize_irq bit */
3763                 ew32(IMC, ~0);
3764                 E1000_WRITE_FLUSH();
3765         }
3766         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3767                 adapter->total_tx_bytes = 0;
3768                 adapter->total_tx_packets = 0;
3769                 adapter->total_rx_bytes = 0;
3770                 adapter->total_rx_packets = 0;
3771                 __netif_rx_schedule(netdev, &adapter->napi);
3772         } else
3773                 /* this really should not happen! if it does it is basically a
3774                  * bug, but not a hard error, so enable ints and continue */
3775                 e1000_irq_enable(adapter);
3776
3777         return IRQ_HANDLED;
3778 }
3779
3780 /**
3781  * e1000_clean - NAPI Rx polling callback
3782  * @adapter: board private structure
3783  **/
3784 static int e1000_clean(struct napi_struct *napi, int budget)
3785 {
3786         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3787         struct net_device *poll_dev = adapter->netdev;
3788         int tx_cleaned = 0, work_done = 0;
3789
3790         adapter = netdev_priv(poll_dev);
3791
3792         /* e1000_clean is called per-cpu.  This lock protects
3793          * tx_ring[0] from being cleaned by multiple cpus
3794          * simultaneously.  A failure obtaining the lock means
3795          * tx_ring[0] is currently being cleaned anyway. */
3796         if (spin_trylock(&adapter->tx_queue_lock)) {
3797                 tx_cleaned = e1000_clean_tx_irq(adapter,
3798                                                 &adapter->tx_ring[0]);
3799                 spin_unlock(&adapter->tx_queue_lock);
3800         }
3801
3802         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3803                           &work_done, budget);
3804
3805         if (tx_cleaned)
3806                 work_done = budget;
3807
3808         /* If budget not fully consumed, exit the polling mode */
3809         if (work_done < budget) {
3810                 if (likely(adapter->itr_setting & 3))
3811                         e1000_set_itr(adapter);
3812                 netif_rx_complete(poll_dev, napi);
3813                 e1000_irq_enable(adapter);
3814         }
3815
3816         return work_done;
3817 }
3818
3819 /**
3820  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3821  * @adapter: board private structure
3822  **/
3823 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3824                                struct e1000_tx_ring *tx_ring)
3825 {
3826         struct e1000_hw *hw = &adapter->hw;
3827         struct net_device *netdev = adapter->netdev;
3828         struct e1000_tx_desc *tx_desc, *eop_desc;
3829         struct e1000_buffer *buffer_info;
3830         unsigned int i, eop;
3831         unsigned int count = 0;
3832         bool cleaned = false;
3833         unsigned int total_tx_bytes=0, total_tx_packets=0;
3834
3835         i = tx_ring->next_to_clean;
3836         eop = tx_ring->buffer_info[i].next_to_watch;
3837         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3838
3839         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3840                 for (cleaned = false; !cleaned; ) {
3841                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3842                         buffer_info = &tx_ring->buffer_info[i];
3843                         cleaned = (i == eop);
3844
3845                         if (cleaned) {
3846                                 struct sk_buff *skb = buffer_info->skb;
3847                                 unsigned int segs, bytecount;
3848                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3849                                 /* multiply data chunks by size of headers */
3850                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3851                                             skb->len;
3852                                 total_tx_packets += segs;
3853                                 total_tx_bytes += bytecount;
3854                         }
3855                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3856                         tx_desc->upper.data = 0;
3857
3858                         if (unlikely(++i == tx_ring->count)) i = 0;
3859                 }
3860
3861                 eop = tx_ring->buffer_info[i].next_to_watch;
3862                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3863 #define E1000_TX_WEIGHT 64
3864                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3865                 if (count++ == E1000_TX_WEIGHT)
3866                         break;
3867         }
3868
3869         tx_ring->next_to_clean = i;
3870
3871 #define TX_WAKE_THRESHOLD 32
3872         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3873                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3874                 /* Make sure that anybody stopping the queue after this
3875                  * sees the new next_to_clean.
3876                  */
3877                 smp_mb();
3878                 if (netif_queue_stopped(netdev)) {
3879                         netif_wake_queue(netdev);
3880                         ++adapter->restart_queue;
3881                 }
3882         }
3883
3884         if (adapter->detect_tx_hung) {
3885                 /* Detect a transmit hang in hardware, this serializes the
3886                  * check with the clearing of time_stamp and movement of i */
3887                 adapter->detect_tx_hung = false;
3888                 if (tx_ring->buffer_info[eop].dma &&
3889                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3890                                (adapter->tx_timeout_factor * HZ))
3891                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3892
3893                         /* detected Tx unit hang */
3894                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3895                                         "  Tx Queue             <%lu>\n"
3896                                         "  TDH                  <%x>\n"
3897                                         "  TDT                  <%x>\n"
3898                                         "  next_to_use          <%x>\n"
3899                                         "  next_to_clean        <%x>\n"
3900                                         "buffer_info[next_to_clean]\n"
3901                                         "  time_stamp           <%lx>\n"
3902                                         "  next_to_watch        <%x>\n"
3903                                         "  jiffies              <%lx>\n"
3904                                         "  next_to_watch.status <%x>\n",
3905                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3906                                         sizeof(struct e1000_tx_ring)),
3907                                 readl(hw->hw_addr + tx_ring->tdh),
3908                                 readl(hw->hw_addr + tx_ring->tdt),
3909                                 tx_ring->next_to_use,
3910                                 tx_ring->next_to_clean,
3911                                 tx_ring->buffer_info[eop].time_stamp,
3912                                 eop,
3913                                 jiffies,
3914                                 eop_desc->upper.fields.status);
3915                         netif_stop_queue(netdev);
3916                 }
3917         }
3918         adapter->total_tx_bytes += total_tx_bytes;
3919         adapter->total_tx_packets += total_tx_packets;
3920         adapter->net_stats.tx_bytes += total_tx_bytes;
3921         adapter->net_stats.tx_packets += total_tx_packets;
3922         return cleaned;
3923 }
3924
3925 /**
3926  * e1000_rx_checksum - Receive Checksum Offload for 82543
3927  * @adapter:     board private structure
3928  * @status_err:  receive descriptor status and error fields
3929  * @csum:        receive descriptor csum field
3930  * @sk_buff:     socket buffer with received data
3931  **/
3932
3933 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3934                               u32 csum, struct sk_buff *skb)
3935 {
3936         struct e1000_hw *hw = &adapter->hw;
3937         u16 status = (u16)status_err;
3938         u8 errors = (u8)(status_err >> 24);
3939         skb->ip_summed = CHECKSUM_NONE;
3940
3941         /* 82543 or newer only */
3942         if (unlikely(hw->mac_type < e1000_82543)) return;
3943         /* Ignore Checksum bit is set */
3944         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3945         /* TCP/UDP checksum error bit is set */
3946         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3947                 /* let the stack verify checksum errors */
3948                 adapter->hw_csum_err++;
3949                 return;
3950         }
3951         /* TCP/UDP Checksum has not been calculated */
3952         if (hw->mac_type <= e1000_82547_rev_2) {
3953                 if (!(status & E1000_RXD_STAT_TCPCS))
3954                         return;
3955         } else {
3956                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3957                         return;
3958         }
3959         /* It must be a TCP or UDP packet with a valid checksum */
3960         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3961                 /* TCP checksum is good */
3962                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3963         } else if (hw->mac_type > e1000_82547_rev_2) {
3964                 /* IP fragment with UDP payload */
3965                 /* Hardware complements the payload checksum, so we undo it
3966                  * and then put the value in host order for further stack use.
3967                  */
3968                 __sum16 sum = (__force __sum16)htons(csum);
3969                 skb->csum = csum_unfold(~sum);
3970                 skb->ip_summed = CHECKSUM_COMPLETE;
3971         }
3972         adapter->hw_csum_good++;
3973 }
3974
3975 /**
3976  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3977  * @adapter: board private structure
3978  **/
3979 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3980                                struct e1000_rx_ring *rx_ring,
3981                                int *work_done, int work_to_do)
3982 {
3983         struct e1000_hw *hw = &adapter->hw;
3984         struct net_device *netdev = adapter->netdev;
3985         struct pci_dev *pdev = adapter->pdev;
3986         struct e1000_rx_desc *rx_desc, *next_rxd;
3987         struct e1000_buffer *buffer_info, *next_buffer;
3988         unsigned long flags;
3989         u32 length;
3990         u8 last_byte;
3991         unsigned int i;
3992         int cleaned_count = 0;
3993         bool cleaned = false;
3994         unsigned int total_rx_bytes=0, total_rx_packets=0;
3995
3996         i = rx_ring->next_to_clean;
3997         rx_desc = E1000_RX_DESC(*rx_ring, i);
3998         buffer_info = &rx_ring->buffer_info[i];
3999
4000         while (rx_desc->status & E1000_RXD_STAT_DD) {
4001                 struct sk_buff *skb;
4002                 u8 status;
4003
4004                 if (*work_done >= work_to_do)
4005                         break;
4006                 (*work_done)++;
4007
4008                 status = rx_desc->status;
4009                 skb = buffer_info->skb;
4010                 buffer_info->skb = NULL;
4011
4012                 prefetch(skb->data - NET_IP_ALIGN);
4013
4014                 if (++i == rx_ring->count) i = 0;
4015                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4016                 prefetch(next_rxd);
4017
4018                 next_buffer = &rx_ring->buffer_info[i];
4019
4020                 cleaned = true;
4021                 cleaned_count++;
4022                 pci_unmap_single(pdev,
4023                                  buffer_info->dma,
4024                                  buffer_info->length,
4025                                  PCI_DMA_FROMDEVICE);
4026
4027                 length = le16_to_cpu(rx_desc->length);
4028
4029                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4030                         /* All receives must fit into a single buffer */
4031                         E1000_DBG("%s: Receive packet consumed multiple"
4032                                   " buffers\n", netdev->name);
4033                         /* recycle */
4034                         buffer_info->skb = skb;
4035                         goto next_desc;
4036                 }
4037
4038                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4039                         last_byte = *(skb->data + length - 1);
4040                         if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4041                                        last_byte)) {
4042                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4043                                 e1000_tbi_adjust_stats(hw, &adapter->stats,
4044                                                        length, skb->data);
4045                                 spin_unlock_irqrestore(&adapter->stats_lock,
4046                                                        flags);
4047                                 length--;
4048                         } else {
4049                                 /* recycle */
4050                                 buffer_info->skb = skb;
4051                                 goto next_desc;
4052                         }
4053                 }
4054
4055                 /* adjust length to remove Ethernet CRC, this must be
4056                  * done after the TBI_ACCEPT workaround above */
4057                 length -= 4;
4058
4059                 /* probably a little skewed due to removing CRC */
4060                 total_rx_bytes += length;
4061                 total_rx_packets++;
4062
4063                 /* code added for copybreak, this should improve
4064                  * performance for small packets with large amounts
4065                  * of reassembly being done in the stack */
4066                 if (length < copybreak) {
4067                         struct sk_buff *new_skb =
4068                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4069                         if (new_skb) {
4070                                 skb_reserve(new_skb, NET_IP_ALIGN);
4071                                 skb_copy_to_linear_data_offset(new_skb,
4072                                                                -NET_IP_ALIGN,
4073                                                                (skb->data -
4074                                                                 NET_IP_ALIGN),
4075                                                                (length +
4076                                                                 NET_IP_ALIGN));
4077                                 /* save the skb in buffer_info as good */
4078                                 buffer_info->skb = skb;
4079                                 skb = new_skb;
4080                         }
4081                         /* else just continue with the old one */
4082                 }
4083                 /* end copybreak code */
4084                 skb_put(skb, length);
4085
4086                 /* Receive Checksum Offload */
4087                 e1000_rx_checksum(adapter,
4088                                   (u32)(status) |
4089                                   ((u32)(rx_desc->errors) << 24),
4090                                   le16_to_cpu(rx_desc->csum), skb);
4091
4092                 skb->protocol = eth_type_trans(skb, netdev);
4093
4094                 if (unlikely(adapter->vlgrp &&
4095                             (status & E1000_RXD_STAT_VP))) {
4096                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4097                                                  le16_to_cpu(rx_desc->special));
4098                 } else {
4099                         netif_receive_skb(skb);
4100                 }
4101
4102 next_desc:
4103                 rx_desc->status = 0;
4104
4105                 /* return some buffers to hardware, one at a time is too slow */
4106                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4107                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4108                         cleaned_count = 0;
4109                 }
4110
4111                 /* use prefetched values */
4112                 rx_desc = next_rxd;
4113                 buffer_info = next_buffer;
4114         }
4115         rx_ring->next_to_clean = i;
4116
4117         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4118         if (cleaned_count)
4119                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4120
4121         adapter->total_rx_packets += total_rx_packets;
4122         adapter->total_rx_bytes += total_rx_bytes;
4123         adapter->net_stats.rx_bytes += total_rx_bytes;
4124         adapter->net_stats.rx_packets += total_rx_packets;
4125         return cleaned;
4126 }
4127
4128 /**
4129  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4130  * @adapter: address of board private structure
4131  **/
4132
4133 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4134                                    struct e1000_rx_ring *rx_ring,
4135                                    int cleaned_count)
4136 {
4137         struct e1000_hw *hw = &adapter->hw;
4138         struct net_device *netdev = adapter->netdev;
4139         struct pci_dev *pdev = adapter->pdev;
4140         struct e1000_rx_desc *rx_desc;
4141         struct e1000_buffer *buffer_info;
4142         struct sk_buff *skb;
4143         unsigned int i;
4144         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4145
4146         i = rx_ring->next_to_use;
4147         buffer_info = &rx_ring->buffer_info[i];
4148
4149         while (cleaned_count--) {
4150                 skb = buffer_info->skb;
4151                 if (skb) {
4152                         skb_trim(skb, 0);
4153                         goto map_skb;
4154                 }
4155
4156                 skb = netdev_alloc_skb(netdev, bufsz);
4157                 if (unlikely(!skb)) {
4158                         /* Better luck next round */
4159                         adapter->alloc_rx_buff_failed++;
4160                         break;
4161                 }
4162
4163                 /* Fix for errata 23, can't cross 64kB boundary */
4164                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4165                         struct sk_buff *oldskb = skb;
4166                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4167                                              "at %p\n", bufsz, skb->data);
4168                         /* Try again, without freeing the previous */
4169                         skb = netdev_alloc_skb(netdev, bufsz);
4170                         /* Failed allocation, critical failure */
4171                         if (!skb) {
4172                                 dev_kfree_skb(oldskb);
4173                                 break;
4174                         }
4175
4176                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4177                                 /* give up */
4178                                 dev_kfree_skb(skb);
4179                                 dev_kfree_skb(oldskb);
4180                                 break; /* while !buffer_info->skb */
4181                         }
4182
4183                         /* Use new allocation */
4184                         dev_kfree_skb(oldskb);
4185                 }
4186                 /* Make buffer alignment 2 beyond a 16 byte boundary
4187                  * this will result in a 16 byte aligned IP header after
4188                  * the 14 byte MAC header is removed
4189                  */
4190                 skb_reserve(skb, NET_IP_ALIGN);
4191
4192                 buffer_info->skb = skb;
4193                 buffer_info->length = adapter->rx_buffer_len;
4194 map_skb:
4195                 buffer_info->dma = pci_map_single(pdev,
4196                                                   skb->data,
4197                                                   adapter->rx_buffer_len,
4198                                                   PCI_DMA_FROMDEVICE);
4199
4200                 /* Fix for errata 23, can't cross 64kB boundary */
4201                 if (!e1000_check_64k_bound(adapter,
4202                                         (void *)(unsigned long)buffer_info->dma,
4203                                         adapter->rx_buffer_len)) {
4204                         DPRINTK(RX_ERR, ERR,
4205                                 "dma align check failed: %u bytes at %p\n",
4206                                 adapter->rx_buffer_len,
4207                                 (void *)(unsigned long)buffer_info->dma);
4208                         dev_kfree_skb(skb);
4209                         buffer_info->skb = NULL;
4210
4211                         pci_unmap_single(pdev, buffer_info->dma,
4212                                          adapter->rx_buffer_len,
4213                                          PCI_DMA_FROMDEVICE);
4214
4215                         break; /* while !buffer_info->skb */
4216                 }
4217                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4218                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4219
4220                 if (unlikely(++i == rx_ring->count))
4221                         i = 0;
4222                 buffer_info = &rx_ring->buffer_info[i];
4223         }
4224
4225         if (likely(rx_ring->next_to_use != i)) {
4226                 rx_ring->next_to_use = i;
4227                 if (unlikely(i-- == 0))
4228                         i = (rx_ring->count - 1);
4229
4230                 /* Force memory writes to complete before letting h/w
4231                  * know there are new descriptors to fetch.  (Only
4232                  * applicable for weak-ordered memory model archs,
4233                  * such as IA-64). */
4234                 wmb();
4235                 writel(i, hw->hw_addr + rx_ring->rdt);
4236         }
4237 }
4238
4239 /**
4240  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4241  * @adapter:
4242  **/
4243
4244 static void e1000_smartspeed(struct e1000_adapter *adapter)
4245 {
4246         struct e1000_hw *hw = &adapter->hw;
4247         u16 phy_status;
4248         u16 phy_ctrl;
4249
4250         if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4251            !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4252                 return;
4253
4254         if (adapter->smartspeed == 0) {
4255                 /* If Master/Slave config fault is asserted twice,
4256                  * we assume back-to-back */
4257                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4258                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4259                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4260                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4261                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4262                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4263                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4264                         e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4265                                             phy_ctrl);
4266                         adapter->smartspeed++;
4267                         if (!e1000_phy_setup_autoneg(hw) &&
4268                            !e1000_read_phy_reg(hw, PHY_CTRL,
4269                                                &phy_ctrl)) {
4270                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4271                                              MII_CR_RESTART_AUTO_NEG);
4272                                 e1000_write_phy_reg(hw, PHY_CTRL,
4273                                                     phy_ctrl);
4274                         }
4275                 }
4276                 return;
4277         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4278                 /* If still no link, perhaps using 2/3 pair cable */
4279                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4280                 phy_ctrl |= CR_1000T_MS_ENABLE;
4281                 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4282                 if (!e1000_phy_setup_autoneg(hw) &&
4283                    !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4284                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4285                                      MII_CR_RESTART_AUTO_NEG);
4286                         e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4287                 }
4288         }
4289         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4290         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4291                 adapter->smartspeed = 0;
4292 }
4293
4294 /**
4295  * e1000_ioctl -
4296  * @netdev:
4297  * @ifreq:
4298  * @cmd:
4299  **/
4300
4301 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4302 {
4303         switch (cmd) {
4304         case SIOCGMIIPHY:
4305         case SIOCGMIIREG:
4306         case SIOCSMIIREG:
4307                 return e1000_mii_ioctl(netdev, ifr, cmd);
4308         default:
4309                 return -EOPNOTSUPP;
4310         }
4311 }
4312
4313 /**
4314  * e1000_mii_ioctl -
4315  * @netdev:
4316  * @ifreq:
4317  * @cmd:
4318  **/
4319
4320 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4321                            int cmd)
4322 {
4323         struct e1000_adapter *adapter = netdev_priv(netdev);
4324         struct e1000_hw *hw = &adapter->hw;
4325         struct mii_ioctl_data *data = if_mii(ifr);
4326         int retval;
4327         u16 mii_reg;
4328         u16 spddplx;
4329         unsigned long flags;
4330
4331         if (hw->media_type != e1000_media_type_copper)
4332                 return -EOPNOTSUPP;
4333
4334         switch (cmd) {
4335         case SIOCGMIIPHY:
4336                 data->phy_id = hw->phy_addr;
4337                 break;
4338         case SIOCGMIIREG:
4339                 if (!capable(CAP_NET_ADMIN))
4340                         return -EPERM;
4341                 spin_lock_irqsave(&adapter->stats_lock, flags);
4342                 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4343                                    &data->val_out)) {
4344                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4345                         return -EIO;
4346                 }
4347                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4348                 break;
4349         case SIOCSMIIREG:
4350                 if (!capable(CAP_NET_ADMIN))
4351                         return -EPERM;
4352                 if (data->reg_num & ~(0x1F))
4353                         return -EFAULT;
4354                 mii_reg = data->val_in;
4355                 spin_lock_irqsave(&adapter->stats_lock, flags);
4356                 if (e1000_write_phy_reg(hw, data->reg_num,
4357                                         mii_reg)) {
4358                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4359                         return -EIO;
4360                 }
4361                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4362                 if (hw->media_type == e1000_media_type_copper) {
4363                         switch (data->reg_num) {
4364                         case PHY_CTRL:
4365                                 if (mii_reg & MII_CR_POWER_DOWN)
4366                                         break;
4367                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4368                                         hw->autoneg = 1;
4369                                         hw->autoneg_advertised = 0x2F;
4370                                 } else {
4371                                         if (mii_reg & 0x40)
4372                                                 spddplx = SPEED_1000;
4373                                         else if (mii_reg & 0x2000)
4374                                                 spddplx = SPEED_100;
4375                                         else
4376                                                 spddplx = SPEED_10;
4377                                         spddplx += (mii_reg & 0x100)
4378                                                    ? DUPLEX_FULL :
4379                                                    DUPLEX_HALF;
4380                                         retval = e1000_set_spd_dplx(adapter,
4381                                                                     spddplx);
4382                                         if (retval)
4383                                                 return retval;
4384                                 }
4385                                 if (netif_running(adapter->netdev))
4386                                         e1000_reinit_locked(adapter);
4387                                 else
4388                                         e1000_reset(adapter);
4389                                 break;
4390                         case M88E1000_PHY_SPEC_CTRL:
4391                         case M88E1000_EXT_PHY_SPEC_CTRL:
4392                                 if (e1000_phy_reset(hw))
4393                                         return -EIO;
4394                                 break;
4395                         }
4396                 } else {
4397                         switch (data->reg_num) {
4398                         case PHY_CTRL:
4399                                 if (mii_reg & MII_CR_POWER_DOWN)
4400                                         break;
4401                                 if (netif_running(adapter->netdev))
4402                                         e1000_reinit_locked(adapter);
4403                                 else
4404                                         e1000_reset(adapter);
4405                                 break;
4406                         }
4407                 }
4408                 break;
4409         default:
4410                 return -EOPNOTSUPP;
4411         }
4412         return E1000_SUCCESS;
4413 }
4414
4415 void e1000_pci_set_mwi(struct e1000_hw *hw)
4416 {
4417         struct e1000_adapter *adapter = hw->back;
4418         int ret_val = pci_set_mwi(adapter->pdev);
4419
4420         if (ret_val)
4421                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4422 }
4423
4424 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4425 {
4426         struct e1000_adapter *adapter = hw->back;
4427
4428         pci_clear_mwi(adapter->pdev);
4429 }
4430
4431 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4432 {
4433         struct e1000_adapter *adapter = hw->back;
4434         return pcix_get_mmrbc(adapter->pdev);
4435 }
4436
4437 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4438 {
4439         struct e1000_adapter *adapter = hw->back;
4440         pcix_set_mmrbc(adapter->pdev, mmrbc);
4441 }
4442
4443 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4444 {
4445     struct e1000_adapter *adapter = hw->back;
4446     u16 cap_offset;
4447
4448     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4449     if (!cap_offset)
4450         return -E1000_ERR_CONFIG;
4451
4452     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4453
4454     return E1000_SUCCESS;
4455 }
4456
4457 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4458 {
4459         outl(value, port);
4460 }
4461
4462 static void e1000_vlan_rx_register(struct net_device *netdev,
4463                                    struct vlan_group *grp)
4464 {
4465         struct e1000_adapter *adapter = netdev_priv(netdev);
4466         struct e1000_hw *hw = &adapter->hw;
4467         u32 ctrl, rctl;
4468
4469         if (!test_bit(__E1000_DOWN, &adapter->flags))
4470                 e1000_irq_disable(adapter);
4471         adapter->vlgrp = grp;
4472
4473         if (grp) {
4474                 /* enable VLAN tag insert/strip */
4475                 ctrl = er32(CTRL);
4476                 ctrl |= E1000_CTRL_VME;
4477                 ew32(CTRL, ctrl);
4478
4479                 if (adapter->hw.mac_type != e1000_ich8lan) {
4480                         /* enable VLAN receive filtering */
4481                         rctl = er32(RCTL);
4482                         rctl &= ~E1000_RCTL_CFIEN;
4483                         ew32(RCTL, rctl);
4484                         e1000_update_mng_vlan(adapter);
4485                 }
4486         } else {
4487                 /* disable VLAN tag insert/strip */
4488                 ctrl = er32(CTRL);
4489                 ctrl &= ~E1000_CTRL_VME;
4490                 ew32(CTRL, ctrl);
4491
4492                 if (adapter->hw.mac_type != e1000_ich8lan) {
4493                         if (adapter->mng_vlan_id !=
4494                             (u16)E1000_MNG_VLAN_NONE) {
4495                                 e1000_vlan_rx_kill_vid(netdev,
4496                                                        adapter->mng_vlan_id);
4497                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4498                         }
4499                 }
4500         }
4501
4502         if (!test_bit(__E1000_DOWN, &adapter->flags))
4503                 e1000_irq_enable(adapter);
4504 }
4505
4506 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4507 {
4508         struct e1000_adapter *adapter = netdev_priv(netdev);
4509         struct e1000_hw *hw = &adapter->hw;
4510         u32 vfta, index;
4511
4512         if ((hw->mng_cookie.status &
4513              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4514             (vid == adapter->mng_vlan_id))
4515                 return;
4516         /* add VID to filter table */
4517         index = (vid >> 5) & 0x7F;
4518         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4519         vfta |= (1 << (vid & 0x1F));
4520         e1000_write_vfta(hw, index, vfta);
4521 }
4522
4523 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4524 {
4525         struct e1000_adapter *adapter = netdev_priv(netdev);
4526         struct e1000_hw *hw = &adapter->hw;
4527         u32 vfta, index;
4528
4529         if (!test_bit(__E1000_DOWN, &adapter->flags))
4530                 e1000_irq_disable(adapter);
4531         vlan_group_set_device(adapter->vlgrp, vid, NULL);
4532         if (!test_bit(__E1000_DOWN, &adapter->flags))
4533                 e1000_irq_enable(adapter);
4534
4535         if ((hw->mng_cookie.status &
4536              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4537             (vid == adapter->mng_vlan_id)) {
4538                 /* release control to f/w */
4539                 e1000_release_hw_control(adapter);
4540                 return;
4541         }
4542
4543         /* remove VID from filter table */
4544         index = (vid >> 5) & 0x7F;
4545         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4546         vfta &= ~(1 << (vid & 0x1F));
4547         e1000_write_vfta(hw, index, vfta);
4548 }
4549
4550 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4551 {
4552         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4553
4554         if (adapter->vlgrp) {
4555                 u16 vid;
4556                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4557                         if (!vlan_group_get_device(adapter->vlgrp, vid))
4558                                 continue;
4559                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4560                 }
4561         }
4562 }
4563
4564 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4565 {
4566         struct e1000_hw *hw = &adapter->hw;
4567
4568         hw->autoneg = 0;
4569
4570         /* Fiber NICs only allow 1000 gbps Full duplex */
4571         if ((hw->media_type == e1000_media_type_fiber) &&
4572                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4573                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4574                 return -EINVAL;
4575         }
4576
4577         switch (spddplx) {
4578         case SPEED_10 + DUPLEX_HALF:
4579                 hw->forced_speed_duplex = e1000_10_half;
4580                 break;
4581         case SPEED_10 + DUPLEX_FULL:
4582                 hw->forced_speed_duplex = e1000_10_full;
4583                 break;
4584         case SPEED_100 + DUPLEX_HALF:
4585                 hw->forced_speed_duplex = e1000_100_half;
4586                 break;
4587         case SPEED_100 + DUPLEX_FULL:
4588                 hw->forced_speed_duplex = e1000_100_full;
4589                 break;
4590         case SPEED_1000 + DUPLEX_FULL:
4591                 hw->autoneg = 1;
4592                 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4593                 break;
4594         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4595         default:
4596                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4597                 return -EINVAL;
4598         }
4599         return 0;
4600 }
4601
4602 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4603 {
4604         struct net_device *netdev = pci_get_drvdata(pdev);
4605         struct e1000_adapter *adapter = netdev_priv(netdev);
4606         struct e1000_hw *hw = &adapter->hw;
4607         u32 ctrl, ctrl_ext, rctl, status;
4608         u32 wufc = adapter->wol;
4609 #ifdef CONFIG_PM
4610         int retval = 0;
4611 #endif
4612
4613         netif_device_detach(netdev);
4614
4615         if (netif_running(netdev)) {
4616                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4617                 e1000_down(adapter);
4618         }
4619
4620 #ifdef CONFIG_PM
4621         retval = pci_save_state(pdev);
4622         if (retval)
4623                 return retval;
4624 #endif
4625
4626         status = er32(STATUS);
4627         if (status & E1000_STATUS_LU)
4628                 wufc &= ~E1000_WUFC_LNKC;
4629
4630         if (wufc) {
4631                 e1000_setup_rctl(adapter);
4632                 e1000_set_rx_mode(netdev);
4633
4634                 /* turn on all-multi mode if wake on multicast is enabled */
4635                 if (wufc & E1000_WUFC_MC) {
4636                         rctl = er32(RCTL);
4637                         rctl |= E1000_RCTL_MPE;
4638                         ew32(RCTL, rctl);
4639                 }
4640
4641                 if (hw->mac_type >= e1000_82540) {
4642                         ctrl = er32(CTRL);
4643                         /* advertise wake from D3Cold */
4644                         #define E1000_CTRL_ADVD3WUC 0x00100000
4645                         /* phy power management enable */
4646                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4647                         ctrl |= E1000_CTRL_ADVD3WUC |
4648                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4649                         ew32(CTRL, ctrl);
4650                 }
4651
4652                 if (hw->media_type == e1000_media_type_fiber ||
4653                    hw->media_type == e1000_media_type_internal_serdes) {
4654                         /* keep the laser running in D3 */
4655                         ctrl_ext = er32(CTRL_EXT);
4656                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4657                         ew32(CTRL_EXT, ctrl_ext);
4658                 }
4659
4660                 /* Allow time for pending master requests to run */
4661                 e1000_disable_pciex_master(hw);
4662
4663                 ew32(WUC, E1000_WUC_PME_EN);
4664                 ew32(WUFC, wufc);
4665                 pci_enable_wake(pdev, PCI_D3hot, 1);
4666                 pci_enable_wake(pdev, PCI_D3cold, 1);
4667         } else {
4668                 ew32(WUC, 0);
4669                 ew32(WUFC, 0);
4670                 pci_enable_wake(pdev, PCI_D3hot, 0);
4671                 pci_enable_wake(pdev, PCI_D3cold, 0);
4672         }
4673
4674         e1000_release_manageability(adapter);
4675
4676         /* make sure adapter isn't asleep if manageability is enabled */
4677         if (adapter->en_mng_pt) {
4678                 pci_enable_wake(pdev, PCI_D3hot, 1);
4679                 pci_enable_wake(pdev, PCI_D3cold, 1);
4680         }
4681
4682         if (hw->phy_type == e1000_phy_igp_3)
4683                 e1000_phy_powerdown_workaround(hw);
4684
4685         if (netif_running(netdev))
4686                 e1000_free_irq(adapter);
4687
4688         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4689          * would have already happened in close and is redundant. */
4690         e1000_release_hw_control(adapter);
4691
4692         pci_disable_device(pdev);
4693
4694         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4695
4696         return 0;
4697 }
4698
4699 #ifdef CONFIG_PM
4700 static int e1000_resume(struct pci_dev *pdev)
4701 {
4702         struct net_device *netdev = pci_get_drvdata(pdev);
4703         struct e1000_adapter *adapter = netdev_priv(netdev);
4704         struct e1000_hw *hw = &adapter->hw;
4705         u32 err;
4706
4707         pci_set_power_state(pdev, PCI_D0);
4708         pci_restore_state(pdev);
4709
4710         if (adapter->need_ioport)
4711                 err = pci_enable_device(pdev);
4712         else
4713                 err = pci_enable_device_mem(pdev);
4714         if (err) {
4715                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4716                 return err;
4717         }
4718         pci_set_master(pdev);
4719
4720         pci_enable_wake(pdev, PCI_D3hot, 0);
4721         pci_enable_wake(pdev, PCI_D3cold, 0);
4722
4723         if (netif_running(netdev)) {
4724                 err = e1000_request_irq(adapter);
4725                 if (err)
4726                         return err;
4727         }
4728
4729         e1000_power_up_phy(adapter);
4730         e1000_reset(adapter);
4731         ew32(WUS, ~0);
4732
4733         e1000_init_manageability(adapter);
4734
4735         if (netif_running(netdev))
4736                 e1000_up(adapter);
4737
4738         netif_device_attach(netdev);
4739
4740         /* If the controller is 82573 and f/w is AMT, do not set
4741          * DRV_LOAD until the interface is up.  For all other cases,
4742          * let the f/w know that the h/w is now under the control
4743          * of the driver. */
4744         if (hw->mac_type != e1000_82573 ||
4745             !e1000_check_mng_mode(hw))
4746                 e1000_get_hw_control(adapter);
4747
4748         return 0;
4749 }
4750 #endif
4751
4752 static void e1000_shutdown(struct pci_dev *pdev)
4753 {
4754         e1000_suspend(pdev, PMSG_SUSPEND);
4755 }
4756
4757 #ifdef CONFIG_NET_POLL_CONTROLLER
4758 /*
4759  * Polling 'interrupt' - used by things like netconsole to send skbs
4760  * without having to re-enable interrupts. It's not called while
4761  * the interrupt routine is executing.
4762  */
4763 static void e1000_netpoll(struct net_device *netdev)
4764 {
4765         struct e1000_adapter *adapter = netdev_priv(netdev);
4766
4767         disable_irq(adapter->pdev->irq);
4768         e1000_intr(adapter->pdev->irq, netdev);
4769         enable_irq(adapter->pdev->irq);
4770 }
4771 #endif
4772
4773 /**
4774  * e1000_io_error_detected - called when PCI error is detected
4775  * @pdev: Pointer to PCI device
4776  * @state: The current pci conneection state
4777  *
4778  * This function is called after a PCI bus error affecting
4779  * this device has been detected.
4780  */
4781 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4782                                                 pci_channel_state_t state)
4783 {
4784         struct net_device *netdev = pci_get_drvdata(pdev);
4785         struct e1000_adapter *adapter = netdev_priv(netdev);
4786
4787         netif_device_detach(netdev);
4788
4789         if (netif_running(netdev))
4790                 e1000_down(adapter);
4791         pci_disable_device(pdev);
4792
4793         /* Request a slot slot reset. */
4794         return PCI_ERS_RESULT_NEED_RESET;
4795 }
4796
4797 /**
4798  * e1000_io_slot_reset - called after the pci bus has been reset.
4799  * @pdev: Pointer to PCI device
4800  *
4801  * Restart the card from scratch, as if from a cold-boot. Implementation
4802  * resembles the first-half of the e1000_resume routine.
4803  */
4804 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4805 {
4806         struct net_device *netdev = pci_get_drvdata(pdev);
4807         struct e1000_adapter *adapter = netdev_priv(netdev);
4808         struct e1000_hw *hw = &adapter->hw;
4809         int err;
4810
4811         if (adapter->need_ioport)
4812                 err = pci_enable_device(pdev);
4813         else
4814                 err = pci_enable_device_mem(pdev);
4815         if (err) {
4816                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4817                 return PCI_ERS_RESULT_DISCONNECT;
4818         }
4819         pci_set_master(pdev);
4820
4821         pci_enable_wake(pdev, PCI_D3hot, 0);
4822         pci_enable_wake(pdev, PCI_D3cold, 0);
4823
4824         e1000_reset(adapter);
4825         ew32(WUS, ~0);
4826
4827         return PCI_ERS_RESULT_RECOVERED;
4828 }
4829
4830 /**
4831  * e1000_io_resume - called when traffic can start flowing again.
4832  * @pdev: Pointer to PCI device
4833  *
4834  * This callback is called when the error recovery driver tells us that
4835  * its OK to resume normal operation. Implementation resembles the
4836  * second-half of the e1000_resume routine.
4837  */
4838 static void e1000_io_resume(struct pci_dev *pdev)
4839 {
4840         struct net_device *netdev = pci_get_drvdata(pdev);
4841         struct e1000_adapter *adapter = netdev_priv(netdev);
4842         struct e1000_hw *hw = &adapter->hw;
4843
4844         e1000_init_manageability(adapter);
4845
4846         if (netif_running(netdev)) {
4847                 if (e1000_up(adapter)) {
4848                         printk("e1000: can't bring device back up after reset\n");
4849                         return;
4850                 }
4851         }
4852
4853         netif_device_attach(netdev);
4854
4855         /* If the controller is 82573 and f/w is AMT, do not set
4856          * DRV_LOAD until the interface is up.  For all other cases,
4857          * let the f/w know that the h/w is now under the control
4858          * of the driver. */
4859         if (hw->mac_type != e1000_82573 ||
4860             !e1000_check_mng_mode(hw))
4861                 e1000_get_hw_control(adapter);
4862
4863 }
4864
4865 /* e1000_main.c */