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   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 static const struct net_device_ops e1000_netdev_ops = {
 892         .ndo_open               = e1000_open,
 893         .ndo_stop               = e1000_close,
 894         .ndo_start_xmit         = e1000_xmit_frame,
 895         .ndo_get_stats          = e1000_get_stats,
 896         .ndo_set_rx_mode        = e1000_set_rx_mode,
 897         .ndo_set_mac_address    = e1000_set_mac,
 898         .ndo_tx_timeout         = e1000_tx_timeout,
 899         .ndo_change_mtu         = e1000_change_mtu,
 900         .ndo_do_ioctl           = e1000_ioctl,
 901         .ndo_validate_addr      = eth_validate_addr,
 902
 903         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
 904         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
 905         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
 906 #ifdef CONFIG_NET_POLL_CONTROLLER
 907         .ndo_poll_controller    = e1000_netpoll,
 908 #endif
 909 };
 910
 911 /**
 912  * e1000_probe - Device Initialization Routine
 913  * @pdev: PCI device information struct
 914  * @ent: entry in e1000_pci_tbl
 915  *
 916  * Returns 0 on success, negative on failure
 917  *
 918  * e1000_probe initializes an adapter identified by a pci_dev structure.
 919  * The OS initialization, configuring of the adapter private structure,
 920  * and a hardware reset occur.
 921  **/
 922 static int __devinit e1000_probe(struct pci_dev *pdev,
 923                                  const struct pci_device_id *ent)
 924 {
 925         struct net_device *netdev;
 926         struct e1000_adapter *adapter;
 927         struct e1000_hw *hw;
 928
 929         static int cards_found = 0;
 930         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 931         int i, err, pci_using_dac;
 932         u16 eeprom_data = 0;
 933         u16 eeprom_apme_mask = E1000_EEPROM_APME;
 934         int bars, need_ioport;
 935
 936         /* do not allocate ioport bars when not needed */
 937         need_ioport = e1000_is_need_ioport(pdev);
 938         if (need_ioport) {
 939                 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
 940                 err = pci_enable_device(pdev);
 941         } else {
 942                 bars = pci_select_bars(pdev, IORESOURCE_MEM);
 943                 err = pci_enable_device(pdev);
 944         }
 945         if (err)
 946                 return err;
 947
 948         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
 949             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
 950                 pci_using_dac = 1;
 951         } else {
 952                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 953                 if (err) {
 954                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 955                         if (err) {
 956                                 E1000_ERR("No usable DMA configuration, "
 957                                           "aborting\n");
 958                                 goto err_dma;
 959                         }
 960                 }
 961                 pci_using_dac = 0;
 962         }
 963
 964         err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
 965         if (err)
 966                 goto err_pci_reg;
 967
 968         pci_set_master(pdev);
 969
 970         err = -ENOMEM;
 971         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 972         if (!netdev)
 973                 goto err_alloc_etherdev;
 974
 975         SET_NETDEV_DEV(netdev, &pdev->dev);
 976
 977         pci_set_drvdata(pdev, netdev);
 978         adapter = netdev_priv(netdev);
 979         adapter->netdev = netdev;
 980         adapter->pdev = pdev;
 981         adapter->msg_enable = (1 << debug) - 1;
 982         adapter->bars = bars;
 983         adapter->need_ioport = need_ioport;
 984
 985         hw = &adapter->hw;
 986         hw->back = adapter;
 987
 988         err = -EIO;
 989         hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
 990         if (!hw->hw_addr)
 991                 goto err_ioremap;
 992
 993         if (adapter->need_ioport) {
 994                 for (i = BAR_1; i <= BAR_5; i++) {
 995                         if (pci_resource_len(pdev, i) == 0)
 996                                 continue;
 997                         if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 998                                 hw->io_base = pci_resource_start(pdev, i);
 999                                 break;
1000                         }
1001                 }
1002         }
1003
1004         netdev->netdev_ops = &e1000_netdev_ops;
1005         e1000_set_ethtool_ops(netdev);
1006         netdev->watchdog_timeo = 5 * HZ;
1007         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1008
1009         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1010
1011         adapter->bd_number = cards_found;
1012
1013         /* setup the private structure */
1014
1015         err = e1000_sw_init(adapter);
1016         if (err)
1017                 goto err_sw_init;
1018
1019         err = -EIO;
1020         /* Flash BAR mapping must happen after e1000_sw_init
1021          * because it depends on mac_type */
1022         if ((hw->mac_type == e1000_ich8lan) &&
1023            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1024                 hw->flash_address = pci_ioremap_bar(pdev, 1);
1025                 if (!hw->flash_address)
1026                         goto err_flashmap;
1027         }
1028
1029         if (e1000_check_phy_reset_block(hw))
1030                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1031
1032         if (hw->mac_type >= e1000_82543) {
1033                 netdev->features = NETIF_F_SG |
1034                                    NETIF_F_HW_CSUM |
1035                                    NETIF_F_HW_VLAN_TX |
1036                                    NETIF_F_HW_VLAN_RX |
1037                                    NETIF_F_HW_VLAN_FILTER;
1038                 if (hw->mac_type == e1000_ich8lan)
1039                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1040         }
1041
1042         if ((hw->mac_type >= e1000_82544) &&
1043            (hw->mac_type != e1000_82547))
1044                 netdev->features |= NETIF_F_TSO;
1045
1046         if (hw->mac_type > e1000_82547_rev_2)
1047                 netdev->features |= NETIF_F_TSO6;
1048         if (pci_using_dac)
1049                 netdev->features |= NETIF_F_HIGHDMA;
1050
1051         netdev->features |= NETIF_F_LLTX;
1052
1053         netdev->vlan_features |= NETIF_F_TSO;
1054         netdev->vlan_features |= NETIF_F_TSO6;
1055         netdev->vlan_features |= NETIF_F_HW_CSUM;
1056         netdev->vlan_features |= NETIF_F_SG;
1057
1058         adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1059
1060         /* initialize eeprom parameters */
1061         if (e1000_init_eeprom_params(hw)) {
1062                 E1000_ERR("EEPROM initialization failed\n");
1063                 goto err_eeprom;
1064         }
1065
1066         /* before reading the EEPROM, reset the controller to
1067          * put the device in a known good starting state */
1068
1069         e1000_reset_hw(hw);
1070
1071         /* make sure the EEPROM is good */
1072         if (e1000_validate_eeprom_checksum(hw) < 0) {
1073                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1074                 e1000_dump_eeprom(adapter);
1075                 /*
1076                  * set MAC address to all zeroes to invalidate and temporary
1077                  * disable this device for the user. This blocks regular
1078                  * traffic while still permitting ethtool ioctls from reaching
1079                  * the hardware as well as allowing the user to run the
1080                  * interface after manually setting a hw addr using
1081                  * `ip set address`
1082                  */
1083                 memset(hw->mac_addr, 0, netdev->addr_len);
1084         } else {
1085                 /* copy the MAC address out of the EEPROM */
1086                 if (e1000_read_mac_addr(hw))
1087                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1088         }
1089         /* don't block initalization here due to bad MAC address */
1090         memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1091         memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1092
1093         if (!is_valid_ether_addr(netdev->perm_addr))
1094                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1095
1096         e1000_get_bus_info(hw);
1097
1098         init_timer(&adapter->tx_fifo_stall_timer);
1099         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1100         adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1101
1102         init_timer(&adapter->watchdog_timer);
1103         adapter->watchdog_timer.function = &e1000_watchdog;
1104         adapter->watchdog_timer.data = (unsigned long) adapter;
1105
1106         init_timer(&adapter->phy_info_timer);
1107         adapter->phy_info_timer.function = &e1000_update_phy_info;
1108         adapter->phy_info_timer.data = (unsigned long)adapter;
1109
1110         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1111
1112         e1000_check_options(adapter);
1113
1114         /* Initial Wake on LAN setting
1115          * If APM wake is enabled in the EEPROM,
1116          * enable the ACPI Magic Packet filter
1117          */
1118
1119         switch (hw->mac_type) {
1120         case e1000_82542_rev2_0:
1121         case e1000_82542_rev2_1:
1122         case e1000_82543:
1123                 break;
1124         case e1000_82544:
1125                 e1000_read_eeprom(hw,
1126                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1127                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1128                 break;
1129         case e1000_ich8lan:
1130                 e1000_read_eeprom(hw,
1131                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1132                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1133                 break;
1134         case e1000_82546:
1135         case e1000_82546_rev_3:
1136         case e1000_82571:
1137         case e1000_80003es2lan:
1138                 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1139                         e1000_read_eeprom(hw,
1140                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1141                         break;
1142                 }
1143                 /* Fall Through */
1144         default:
1145                 e1000_read_eeprom(hw,
1146                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1147                 break;
1148         }
1149         if (eeprom_data & eeprom_apme_mask)
1150                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1151
1152         /* now that we have the eeprom settings, apply the special cases
1153          * where the eeprom may be wrong or the board simply won't support
1154          * wake on lan on a particular port */
1155         switch (pdev->device) {
1156         case E1000_DEV_ID_82546GB_PCIE:
1157                 adapter->eeprom_wol = 0;
1158                 break;
1159         case E1000_DEV_ID_82546EB_FIBER:
1160         case E1000_DEV_ID_82546GB_FIBER:
1161         case E1000_DEV_ID_82571EB_FIBER:
1162                 /* Wake events only supported on port A for dual fiber
1163                  * regardless of eeprom setting */
1164                 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1165                         adapter->eeprom_wol = 0;
1166                 break;
1167         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1168         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1169         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1170         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1171         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1172                 /* if quad port adapter, disable WoL on all but port A */
1173                 if (global_quad_port_a != 0)
1174                         adapter->eeprom_wol = 0;
1175                 else
1176                         adapter->quad_port_a = 1;
1177                 /* Reset for multiple quad port adapters */
1178                 if (++global_quad_port_a == 4)
1179                         global_quad_port_a = 0;
1180                 break;
1181         }
1182
1183         /* initialize the wol settings based on the eeprom settings */
1184         adapter->wol = adapter->eeprom_wol;
1185         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1186
1187         /* print bus type/speed/width info */
1188         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1189                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1190                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1191                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1192                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1193                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1194                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1195                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1196                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1197                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1198                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1199                  "32-bit"));
1200
1201         printk("%pM\n", netdev->dev_addr);
1202
1203         if (hw->bus_type == e1000_bus_type_pci_express) {
1204                 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1205                         "longer be supported by this driver in the future.\n",
1206                         pdev->vendor, pdev->device);
1207                 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1208                         "driver instead.\n");
1209         }
1210
1211         /* reset the hardware with the new settings */
1212         e1000_reset(adapter);
1213
1214         /* If the controller is 82573 and f/w is AMT, do not set
1215          * DRV_LOAD until the interface is up.  For all other cases,
1216          * let the f/w know that the h/w is now under the control
1217          * of the driver. */
1218         if (hw->mac_type != e1000_82573 ||
1219             !e1000_check_mng_mode(hw))
1220                 e1000_get_hw_control(adapter);
1221
1222         /* tell the stack to leave us alone until e1000_open() is called */
1223         netif_carrier_off(netdev);
1224         netif_stop_queue(netdev);
1225
1226         strcpy(netdev->name, "eth%d");
1227         err = register_netdev(netdev);
1228         if (err)
1229                 goto err_register;
1230
1231         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1232
1233         cards_found++;
1234         return 0;
1235
1236 err_register:
1237         e1000_release_hw_control(adapter);
1238 err_eeprom:
1239         if (!e1000_check_phy_reset_block(hw))
1240                 e1000_phy_hw_reset(hw);
1241
1242         if (hw->flash_address)
1243                 iounmap(hw->flash_address);
1244 err_flashmap:
1245         for (i = 0; i < adapter->num_rx_queues; i++)
1246                 dev_put(&adapter->polling_netdev[i]);
1247
1248         kfree(adapter->tx_ring);
1249         kfree(adapter->rx_ring);
1250         kfree(adapter->polling_netdev);
1251 err_sw_init:
1252         iounmap(hw->hw_addr);
1253 err_ioremap:
1254         free_netdev(netdev);
1255 err_alloc_etherdev:
1256         pci_release_selected_regions(pdev, bars);
1257 err_pci_reg:
1258 err_dma:
1259         pci_disable_device(pdev);
1260         return err;
1261 }
1262
1263 /**
1264  * e1000_remove - Device Removal Routine
1265  * @pdev: PCI device information struct
1266  *
1267  * e1000_remove is called by the PCI subsystem to alert the driver
1268  * that it should release a PCI device.  The could be caused by a
1269  * Hot-Plug event, or because the driver is going to be removed from
1270  * memory.
1271  **/
1272
1273 static void __devexit e1000_remove(struct pci_dev *pdev)
1274 {
1275         struct net_device *netdev = pci_get_drvdata(pdev);
1276         struct e1000_adapter *adapter = netdev_priv(netdev);
1277         struct e1000_hw *hw = &adapter->hw;
1278         int i;
1279
1280         cancel_work_sync(&adapter->reset_task);
1281
1282         e1000_release_manageability(adapter);
1283
1284         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1285          * would have already happened in close and is redundant. */
1286         e1000_release_hw_control(adapter);
1287
1288         for (i = 0; i < adapter->num_rx_queues; i++)
1289                 dev_put(&adapter->polling_netdev[i]);
1290
1291         unregister_netdev(netdev);
1292
1293         if (!e1000_check_phy_reset_block(hw))
1294                 e1000_phy_hw_reset(hw);
1295
1296         kfree(adapter->tx_ring);
1297         kfree(adapter->rx_ring);
1298         kfree(adapter->polling_netdev);
1299
1300         iounmap(hw->hw_addr);
1301         if (hw->flash_address)
1302                 iounmap(hw->flash_address);
1303         pci_release_selected_regions(pdev, adapter->bars);
1304
1305         free_netdev(netdev);
1306
1307         pci_disable_device(pdev);
1308 }
1309
1310 /**
1311  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1312  * @adapter: board private structure to initialize
1313  *
1314  * e1000_sw_init initializes the Adapter private data structure.
1315  * Fields are initialized based on PCI device information and
1316  * OS network device settings (MTU size).
1317  **/
1318
1319 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1320 {
1321         struct e1000_hw *hw = &adapter->hw;
1322         struct net_device *netdev = adapter->netdev;
1323         struct pci_dev *pdev = adapter->pdev;
1324         int i;
1325
1326         /* PCI config space info */
1327
1328         hw->vendor_id = pdev->vendor;
1329         hw->device_id = pdev->device;
1330         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1331         hw->subsystem_id = pdev->subsystem_device;
1332         hw->revision_id = pdev->revision;
1333
1334         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1335
1336         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1337         hw->max_frame_size = netdev->mtu +
1338                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1339         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1340
1341         /* identify the MAC */
1342
1343         if (e1000_set_mac_type(hw)) {
1344                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1345                 return -EIO;
1346         }
1347
1348         switch (hw->mac_type) {
1349         default:
1350                 break;
1351         case e1000_82541:
1352         case e1000_82547:
1353         case e1000_82541_rev_2:
1354         case e1000_82547_rev_2:
1355                 hw->phy_init_script = 1;
1356                 break;
1357         }
1358
1359         e1000_set_media_type(hw);
1360
1361         hw->wait_autoneg_complete = false;
1362         hw->tbi_compatibility_en = true;
1363         hw->adaptive_ifs = true;
1364
1365         /* Copper options */
1366
1367         if (hw->media_type == e1000_media_type_copper) {
1368                 hw->mdix = AUTO_ALL_MODES;
1369                 hw->disable_polarity_correction = false;
1370                 hw->master_slave = E1000_MASTER_SLAVE;
1371         }
1372
1373         adapter->num_tx_queues = 1;
1374         adapter->num_rx_queues = 1;
1375
1376         if (e1000_alloc_queues(adapter)) {
1377                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1378                 return -ENOMEM;
1379         }
1380
1381         for (i = 0; i < adapter->num_rx_queues; i++) {
1382                 adapter->polling_netdev[i].priv = adapter;
1383                 dev_hold(&adapter->polling_netdev[i]);
1384                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1385         }
1386         spin_lock_init(&adapter->tx_queue_lock);
1387
1388         /* Explicitly disable IRQ since the NIC can be in any state. */
1389         e1000_irq_disable(adapter);
1390
1391         spin_lock_init(&adapter->stats_lock);
1392
1393         set_bit(__E1000_DOWN, &adapter->flags);
1394
1395         return 0;
1396 }
1397
1398 /**
1399  * e1000_alloc_queues - Allocate memory for all rings
1400  * @adapter: board private structure to initialize
1401  *
1402  * We allocate one ring per queue at run-time since we don't know the
1403  * number of queues at compile-time.  The polling_netdev array is
1404  * intended for Multiqueue, but should work fine with a single queue.
1405  **/
1406
1407 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1408 {
1409         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1410                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1411         if (!adapter->tx_ring)
1412                 return -ENOMEM;
1413
1414         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1415                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1416         if (!adapter->rx_ring) {
1417                 kfree(adapter->tx_ring);
1418                 return -ENOMEM;
1419         }
1420
1421         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1422                                           sizeof(struct net_device),
1423                                           GFP_KERNEL);
1424         if (!adapter->polling_netdev) {
1425                 kfree(adapter->tx_ring);
1426                 kfree(adapter->rx_ring);
1427                 return -ENOMEM;
1428         }
1429
1430         return E1000_SUCCESS;
1431 }
1432
1433 /**
1434  * e1000_open - Called when a network interface is made active
1435  * @netdev: network interface device structure
1436  *
1437  * Returns 0 on success, negative value on failure
1438  *
1439  * The open entry point is called when a network interface is made
1440  * active by the system (IFF_UP).  At this point all resources needed
1441  * for transmit and receive operations are allocated, the interrupt
1442  * handler is registered with the OS, the watchdog timer is started,
1443  * and the stack is notified that the interface is ready.
1444  **/
1445
1446 static int e1000_open(struct net_device *netdev)
1447 {
1448         struct e1000_adapter *adapter = netdev_priv(netdev);
1449         struct e1000_hw *hw = &adapter->hw;
1450         int err;
1451
1452         /* disallow open during test */
1453         if (test_bit(__E1000_TESTING, &adapter->flags))
1454                 return -EBUSY;
1455
1456         /* allocate transmit descriptors */
1457         err = e1000_setup_all_tx_resources(adapter);
1458         if (err)
1459                 goto err_setup_tx;
1460
1461         /* allocate receive descriptors */
1462         err = e1000_setup_all_rx_resources(adapter);
1463         if (err)
1464                 goto err_setup_rx;
1465
1466         e1000_power_up_phy(adapter);
1467
1468         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1469         if ((hw->mng_cookie.status &
1470                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1471                 e1000_update_mng_vlan(adapter);
1472         }
1473
1474         /* If AMT is enabled, let the firmware know that the network
1475          * interface is now open */
1476         if (hw->mac_type == e1000_82573 &&
1477             e1000_check_mng_mode(hw))
1478                 e1000_get_hw_control(adapter);
1479
1480         /* before we allocate an interrupt, we must be ready to handle it.
1481          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1482          * as soon as we call pci_request_irq, so we have to setup our
1483          * clean_rx handler before we do so.  */
1484         e1000_configure(adapter);
1485
1486         err = e1000_request_irq(adapter);
1487         if (err)
1488                 goto err_req_irq;
1489
1490         /* From here on the code is the same as e1000_up() */
1491         clear_bit(__E1000_DOWN, &adapter->flags);
1492
1493         napi_enable(&adapter->napi);
1494
1495         e1000_irq_enable(adapter);
1496
1497         netif_start_queue(netdev);
1498
1499         /* fire a link status change interrupt to start the watchdog */
1500         ew32(ICS, E1000_ICS_LSC);
1501
1502         return E1000_SUCCESS;
1503
1504 err_req_irq:
1505         e1000_release_hw_control(adapter);
1506         e1000_power_down_phy(adapter);
1507         e1000_free_all_rx_resources(adapter);
1508 err_setup_rx:
1509         e1000_free_all_tx_resources(adapter);
1510 err_setup_tx:
1511         e1000_reset(adapter);
1512
1513         return err;
1514 }
1515
1516 /**
1517  * e1000_close - Disables a network interface
1518  * @netdev: network interface device structure
1519  *
1520  * Returns 0, this is not allowed to fail
1521  *
1522  * The close entry point is called when an interface is de-activated
1523  * by the OS.  The hardware is still under the drivers control, but
1524  * needs to be disabled.  A global MAC reset is issued to stop the
1525  * hardware, and all transmit and receive resources are freed.
1526  **/
1527
1528 static int e1000_close(struct net_device *netdev)
1529 {
1530         struct e1000_adapter *adapter = netdev_priv(netdev);
1531         struct e1000_hw *hw = &adapter->hw;
1532
1533         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1534         e1000_down(adapter);
1535         e1000_power_down_phy(adapter);
1536         e1000_free_irq(adapter);
1537
1538         e1000_free_all_tx_resources(adapter);
1539         e1000_free_all_rx_resources(adapter);
1540
1541         /* kill manageability vlan ID if supported, but not if a vlan with
1542          * the same ID is registered on the host OS (let 8021q kill it) */
1543         if ((hw->mng_cookie.status &
1544                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1545              !(adapter->vlgrp &&
1546                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1547                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1548         }
1549
1550         /* If AMT is enabled, let the firmware know that the network
1551          * interface is now closed */
1552         if (hw->mac_type == e1000_82573 &&
1553             e1000_check_mng_mode(hw))
1554                 e1000_release_hw_control(adapter);
1555
1556         return 0;
1557 }
1558
1559 /**
1560  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1561  * @adapter: address of board private structure
1562  * @start: address of beginning of memory
1563  * @len: length of memory
1564  **/
1565 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1566                                   unsigned long len)
1567 {
1568         struct e1000_hw *hw = &adapter->hw;
1569         unsigned long begin = (unsigned long)start;
1570         unsigned long end = begin + len;
1571
1572         /* First rev 82545 and 82546 need to not allow any memory
1573          * write location to cross 64k boundary due to errata 23 */
1574         if (hw->mac_type == e1000_82545 ||
1575             hw->mac_type == e1000_82546) {
1576                 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1577         }
1578
1579         return true;
1580 }
1581
1582 /**
1583  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1584  * @adapter: board private structure
1585  * @txdr:    tx descriptor ring (for a specific queue) to setup
1586  *
1587  * Return 0 on success, negative on failure
1588  **/
1589
1590 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1591                                     struct e1000_tx_ring *txdr)
1592 {
1593         struct pci_dev *pdev = adapter->pdev;
1594         int size;
1595
1596         size = sizeof(struct e1000_buffer) * txdr->count;
1597         txdr->buffer_info = vmalloc(size);
1598         if (!txdr->buffer_info) {
1599                 DPRINTK(PROBE, ERR,
1600                 "Unable to allocate memory for the transmit descriptor ring\n");
1601                 return -ENOMEM;
1602         }
1603         memset(txdr->buffer_info, 0, size);
1604
1605         /* round up to nearest 4K */
1606
1607         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1608         txdr->size = ALIGN(txdr->size, 4096);
1609
1610         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1611         if (!txdr->desc) {
1612 setup_tx_desc_die:
1613                 vfree(txdr->buffer_info);
1614                 DPRINTK(PROBE, ERR,
1615                 "Unable to allocate memory for the transmit descriptor ring\n");
1616                 return -ENOMEM;
1617         }
1618
1619         /* Fix for errata 23, can't cross 64kB boundary */
1620         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1621                 void *olddesc = txdr->desc;
1622                 dma_addr_t olddma = txdr->dma;
1623                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1624                                      "at %p\n", txdr->size, txdr->desc);
1625                 /* Try again, without freeing the previous */
1626                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1627                 /* Failed allocation, critical failure */
1628                 if (!txdr->desc) {
1629                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1630                         goto setup_tx_desc_die;
1631                 }
1632
1633                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1634                         /* give up */
1635                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1636                                             txdr->dma);
1637                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1638                         DPRINTK(PROBE, ERR,
1639                                 "Unable to allocate aligned memory "
1640                                 "for the transmit descriptor ring\n");
1641                         vfree(txdr->buffer_info);
1642                         return -ENOMEM;
1643                 } else {
1644                         /* Free old allocation, new allocation was successful */
1645                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1646                 }
1647         }
1648         memset(txdr->desc, 0, txdr->size);
1649
1650         txdr->next_to_use = 0;
1651         txdr->next_to_clean = 0;
1652         spin_lock_init(&txdr->tx_lock);
1653
1654         return 0;
1655 }
1656
1657 /**
1658  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1659  *                                (Descriptors) for all queues
1660  * @adapter: board private structure
1661  *
1662  * Return 0 on success, negative on failure
1663  **/
1664
1665 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1666 {
1667         int i, err = 0;
1668
1669         for (i = 0; i < adapter->num_tx_queues; i++) {
1670                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1671                 if (err) {
1672                         DPRINTK(PROBE, ERR,
1673                                 "Allocation for Tx Queue %u failed\n", i);
1674                         for (i-- ; i >= 0; i--)
1675                                 e1000_free_tx_resources(adapter,
1676                                                         &adapter->tx_ring[i]);
1677                         break;
1678                 }
1679         }
1680
1681         return err;
1682 }
1683
1684 /**
1685  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1686  * @adapter: board private structure
1687  *
1688  * Configure the Tx unit of the MAC after a reset.
1689  **/
1690
1691 static void e1000_configure_tx(struct e1000_adapter *adapter)
1692 {
1693         u64 tdba;
1694         struct e1000_hw *hw = &adapter->hw;
1695         u32 tdlen, tctl, tipg, tarc;
1696         u32 ipgr1, ipgr2;
1697
1698         /* Setup the HW Tx Head and Tail descriptor pointers */
1699
1700         switch (adapter->num_tx_queues) {
1701         case 1:
1702         default:
1703                 tdba = adapter->tx_ring[0].dma;
1704                 tdlen = adapter->tx_ring[0].count *
1705                         sizeof(struct e1000_tx_desc);
1706                 ew32(TDLEN, tdlen);
1707                 ew32(TDBAH, (tdba >> 32));
1708                 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1709                 ew32(TDT, 0);
1710                 ew32(TDH, 0);
1711                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1712                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1713                 break;
1714         }
1715
1716         /* Set the default values for the Tx Inter Packet Gap timer */
1717         if (hw->mac_type <= e1000_82547_rev_2 &&
1718             (hw->media_type == e1000_media_type_fiber ||
1719              hw->media_type == e1000_media_type_internal_serdes))
1720                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1721         else
1722                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1723
1724         switch (hw->mac_type) {
1725         case e1000_82542_rev2_0:
1726         case e1000_82542_rev2_1:
1727                 tipg = DEFAULT_82542_TIPG_IPGT;
1728                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1729                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1730                 break;
1731         case e1000_80003es2lan:
1732                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1733                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1734                 break;
1735         default:
1736                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1737                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1738                 break;
1739         }
1740         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1741         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1742         ew32(TIPG, tipg);
1743
1744         /* Set the Tx Interrupt Delay register */
1745
1746         ew32(TIDV, adapter->tx_int_delay);
1747         if (hw->mac_type >= e1000_82540)
1748                 ew32(TADV, adapter->tx_abs_int_delay);
1749
1750         /* Program the Transmit Control Register */
1751
1752         tctl = er32(TCTL);
1753         tctl &= ~E1000_TCTL_CT;
1754         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1755                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1756
1757         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1758                 tarc = er32(TARC0);
1759                 /* set the speed mode bit, we'll clear it if we're not at
1760                  * gigabit link later */
1761                 tarc |= (1 << 21);
1762                 ew32(TARC0, tarc);
1763         } else if (hw->mac_type == e1000_80003es2lan) {
1764                 tarc = er32(TARC0);
1765                 tarc |= 1;
1766                 ew32(TARC0, tarc);
1767                 tarc = er32(TARC1);
1768                 tarc |= 1;
1769                 ew32(TARC1, tarc);
1770         }
1771
1772         e1000_config_collision_dist(hw);
1773
1774         /* Setup Transmit Descriptor Settings for eop descriptor */
1775         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1776
1777         /* only set IDE if we are delaying interrupts using the timers */
1778         if (adapter->tx_int_delay)
1779                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1780
1781         if (hw->mac_type < e1000_82543)
1782                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1783         else
1784                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1785
1786         /* Cache if we're 82544 running in PCI-X because we'll
1787          * need this to apply a workaround later in the send path. */
1788         if (hw->mac_type == e1000_82544 &&
1789             hw->bus_type == e1000_bus_type_pcix)
1790                 adapter->pcix_82544 = 1;
1791
1792         ew32(TCTL, tctl);
1793
1794 }
1795
1796 /**
1797  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1798  * @adapter: board private structure
1799  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1800  *
1801  * Returns 0 on success, negative on failure
1802  **/
1803
1804 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1805                                     struct e1000_rx_ring *rxdr)
1806 {
1807         struct e1000_hw *hw = &adapter->hw;
1808         struct pci_dev *pdev = adapter->pdev;
1809         int size, desc_len;
1810
1811         size = sizeof(struct e1000_buffer) * rxdr->count;
1812         rxdr->buffer_info = vmalloc(size);
1813         if (!rxdr->buffer_info) {
1814                 DPRINTK(PROBE, ERR,
1815                 "Unable to allocate memory for the receive descriptor ring\n");
1816                 return -ENOMEM;
1817         }
1818         memset(rxdr->buffer_info, 0, size);
1819
1820         if (hw->mac_type <= e1000_82547_rev_2)
1821                 desc_len = sizeof(struct e1000_rx_desc);
1822         else
1823                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1824
1825         /* Round up to nearest 4K */
1826
1827         rxdr->size = rxdr->count * desc_len;
1828         rxdr->size = ALIGN(rxdr->size, 4096);
1829
1830         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1831
1832         if (!rxdr->desc) {
1833                 DPRINTK(PROBE, ERR,
1834                 "Unable to allocate memory for the receive descriptor ring\n");
1835 setup_rx_desc_die:
1836                 vfree(rxdr->buffer_info);
1837                 return -ENOMEM;
1838         }
1839
1840         /* Fix for errata 23, can't cross 64kB boundary */
1841         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1842                 void *olddesc = rxdr->desc;
1843                 dma_addr_t olddma = rxdr->dma;
1844                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1845                                      "at %p\n", rxdr->size, rxdr->desc);
1846                 /* Try again, without freeing the previous */
1847                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1848                 /* Failed allocation, critical failure */
1849                 if (!rxdr->desc) {
1850                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1851                         DPRINTK(PROBE, ERR,
1852                                 "Unable to allocate memory "
1853                                 "for the receive descriptor ring\n");
1854                         goto setup_rx_desc_die;
1855                 }
1856
1857                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1858                         /* give up */
1859                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1860                                             rxdr->dma);
1861                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1862                         DPRINTK(PROBE, ERR,
1863                                 "Unable to allocate aligned memory "
1864                                 "for the receive descriptor ring\n");
1865                         goto setup_rx_desc_die;
1866                 } else {
1867                         /* Free old allocation, new allocation was successful */
1868                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1869                 }
1870         }
1871         memset(rxdr->desc, 0, rxdr->size);
1872
1873         rxdr->next_to_clean = 0;
1874         rxdr->next_to_use = 0;
1875
1876         return 0;
1877 }
1878
1879 /**
1880  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1881  *                                (Descriptors) for all queues
1882  * @adapter: board private structure
1883  *
1884  * Return 0 on success, negative on failure
1885  **/
1886
1887 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1888 {
1889         int i, err = 0;
1890
1891         for (i = 0; i < adapter->num_rx_queues; i++) {
1892                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1893                 if (err) {
1894                         DPRINTK(PROBE, ERR,
1895                                 "Allocation for Rx Queue %u failed\n", i);
1896                         for (i-- ; i >= 0; i--)
1897                                 e1000_free_rx_resources(adapter,
1898                                                         &adapter->rx_ring[i]);
1899                         break;
1900                 }
1901         }
1902
1903         return err;
1904 }
1905
1906 /**
1907  * e1000_setup_rctl - configure the receive control registers
1908  * @adapter: Board private structure
1909  **/
1910 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1911                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1912 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1913 {
1914         struct e1000_hw *hw = &adapter->hw;
1915         u32 rctl;
1916
1917         rctl = er32(RCTL);
1918
1919         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1920
1921         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1922                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1923                 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1924
1925         if (hw->tbi_compatibility_on == 1)
1926                 rctl |= E1000_RCTL_SBP;
1927         else
1928                 rctl &= ~E1000_RCTL_SBP;
1929
1930         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1931                 rctl &= ~E1000_RCTL_LPE;
1932         else
1933                 rctl |= E1000_RCTL_LPE;
1934
1935         /* Setup buffer sizes */
1936         rctl &= ~E1000_RCTL_SZ_4096;
1937         rctl |= E1000_RCTL_BSEX;
1938         switch (adapter->rx_buffer_len) {
1939                 case E1000_RXBUFFER_256:
1940                         rctl |= E1000_RCTL_SZ_256;
1941                         rctl &= ~E1000_RCTL_BSEX;
1942                         break;
1943                 case E1000_RXBUFFER_512:
1944                         rctl |= E1000_RCTL_SZ_512;
1945                         rctl &= ~E1000_RCTL_BSEX;
1946                         break;
1947                 case E1000_RXBUFFER_1024:
1948                         rctl |= E1000_RCTL_SZ_1024;
1949                         rctl &= ~E1000_RCTL_BSEX;
1950                         break;
1951                 case E1000_RXBUFFER_2048:
1952                 default:
1953                         rctl |= E1000_RCTL_SZ_2048;
1954                         rctl &= ~E1000_RCTL_BSEX;
1955                         break;
1956                 case E1000_RXBUFFER_4096:
1957                         rctl |= E1000_RCTL_SZ_4096;
1958                         break;
1959                 case E1000_RXBUFFER_8192:
1960                         rctl |= E1000_RCTL_SZ_8192;
1961                         break;
1962                 case E1000_RXBUFFER_16384:
1963                         rctl |= E1000_RCTL_SZ_16384;
1964                         break;
1965         }
1966
1967         ew32(RCTL, rctl);
1968 }
1969
1970 /**
1971  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1972  * @adapter: board private structure
1973  *
1974  * Configure the Rx unit of the MAC after a reset.
1975  **/
1976
1977 static void e1000_configure_rx(struct e1000_adapter *adapter)
1978 {
1979         u64 rdba;
1980         struct e1000_hw *hw = &adapter->hw;
1981         u32 rdlen, rctl, rxcsum, ctrl_ext;
1982
1983         rdlen = adapter->rx_ring[0].count *
1984                 sizeof(struct e1000_rx_desc);
1985         adapter->clean_rx = e1000_clean_rx_irq;
1986         adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1987
1988         /* disable receives while setting up the descriptors */
1989         rctl = er32(RCTL);
1990         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1991
1992         /* set the Receive Delay Timer Register */
1993         ew32(RDTR, adapter->rx_int_delay);
1994
1995         if (hw->mac_type >= e1000_82540) {
1996                 ew32(RADV, adapter->rx_abs_int_delay);
1997                 if (adapter->itr_setting != 0)
1998                         ew32(ITR, 1000000000 / (adapter->itr * 256));
1999         }
2000
2001         if (hw->mac_type >= e1000_82571) {
2002                 ctrl_ext = er32(CTRL_EXT);
2003                 /* Reset delay timers after every interrupt */
2004                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2005                 /* Auto-Mask interrupts upon ICR access */
2006                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2007                 ew32(IAM, 0xffffffff);
2008                 ew32(CTRL_EXT, ctrl_ext);
2009                 E1000_WRITE_FLUSH();
2010         }
2011
2012         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2013          * the Base and Length of the Rx Descriptor Ring */
2014         switch (adapter->num_rx_queues) {
2015         case 1:
2016         default:
2017                 rdba = adapter->rx_ring[0].dma;
2018                 ew32(RDLEN, rdlen);
2019                 ew32(RDBAH, (rdba >> 32));
2020                 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2021                 ew32(RDT, 0);
2022                 ew32(RDH, 0);
2023                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2024                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2025                 break;
2026         }
2027
2028         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2029         if (hw->mac_type >= e1000_82543) {
2030                 rxcsum = er32(RXCSUM);
2031                 if (adapter->rx_csum)
2032                         rxcsum |= E1000_RXCSUM_TUOFL;
2033                 else
2034                         /* don't need to clear IPPCSE as it defaults to 0 */
2035                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2036                 ew32(RXCSUM, rxcsum);
2037         }
2038
2039         /* Enable Receives */
2040         ew32(RCTL, rctl);
2041 }
2042
2043 /**
2044  * e1000_free_tx_resources - Free Tx Resources per Queue
2045  * @adapter: board private structure
2046  * @tx_ring: Tx descriptor ring for a specific queue
2047  *
2048  * Free all transmit software resources
2049  **/
2050
2051 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2052                                     struct e1000_tx_ring *tx_ring)
2053 {
2054         struct pci_dev *pdev = adapter->pdev;
2055
2056         e1000_clean_tx_ring(adapter, tx_ring);
2057
2058         vfree(tx_ring->buffer_info);
2059         tx_ring->buffer_info = NULL;
2060
2061         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2062
2063         tx_ring->desc = NULL;
2064 }
2065
2066 /**
2067  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2068  * @adapter: board private structure
2069  *
2070  * Free all transmit software resources
2071  **/
2072
2073 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2074 {
2075         int i;
2076
2077         for (i = 0; i < adapter->num_tx_queues; i++)
2078                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2079 }
2080
2081 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2082                                              struct e1000_buffer *buffer_info)
2083 {
2084         if (buffer_info->dma) {
2085                 pci_unmap_page(adapter->pdev,
2086                                 buffer_info->dma,
2087                                 buffer_info->length,
2088                                 PCI_DMA_TODEVICE);
2089                 buffer_info->dma = 0;
2090         }
2091         if (buffer_info->skb) {
2092                 dev_kfree_skb_any(buffer_info->skb);
2093                 buffer_info->skb = NULL;
2094         }
2095         /* buffer_info must be completely set up in the transmit path */
2096 }
2097
2098 /**
2099  * e1000_clean_tx_ring - Free Tx Buffers
2100  * @adapter: board private structure
2101  * @tx_ring: ring to be cleaned
2102  **/
2103
2104 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2105                                 struct e1000_tx_ring *tx_ring)
2106 {
2107         struct e1000_hw *hw = &adapter->hw;
2108         struct e1000_buffer *buffer_info;
2109         unsigned long size;
2110         unsigned int i;
2111
2112         /* Free all the Tx ring sk_buffs */
2113
2114         for (i = 0; i < tx_ring->count; i++) {
2115                 buffer_info = &tx_ring->buffer_info[i];
2116                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2117         }
2118
2119         size = sizeof(struct e1000_buffer) * tx_ring->count;
2120         memset(tx_ring->buffer_info, 0, size);
2121
2122         /* Zero out the descriptor ring */
2123
2124         memset(tx_ring->desc, 0, tx_ring->size);
2125
2126         tx_ring->next_to_use = 0;
2127         tx_ring->next_to_clean = 0;
2128         tx_ring->last_tx_tso = 0;
2129
2130         writel(0, hw->hw_addr + tx_ring->tdh);
2131         writel(0, hw->hw_addr + tx_ring->tdt);
2132 }
2133
2134 /**
2135  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2136  * @adapter: board private structure
2137  **/
2138
2139 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2140 {
2141         int i;
2142
2143         for (i = 0; i < adapter->num_tx_queues; i++)
2144                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2145 }
2146
2147 /**
2148  * e1000_free_rx_resources - Free Rx Resources
2149  * @adapter: board private structure
2150  * @rx_ring: ring to clean the resources from
2151  *
2152  * Free all receive software resources
2153  **/
2154
2155 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2156                                     struct e1000_rx_ring *rx_ring)
2157 {
2158         struct pci_dev *pdev = adapter->pdev;
2159
2160         e1000_clean_rx_ring(adapter, rx_ring);
2161
2162         vfree(rx_ring->buffer_info);
2163         rx_ring->buffer_info = NULL;
2164
2165         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2166
2167         rx_ring->desc = NULL;
2168 }
2169
2170 /**
2171  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2172  * @adapter: board private structure
2173  *
2174  * Free all receive software resources
2175  **/
2176
2177 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2178 {
2179         int i;
2180
2181         for (i = 0; i < adapter->num_rx_queues; i++)
2182                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2183 }
2184
2185 /**
2186  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2187  * @adapter: board private structure
2188  * @rx_ring: ring to free buffers from
2189  **/
2190
2191 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2192                                 struct e1000_rx_ring *rx_ring)
2193 {
2194         struct e1000_hw *hw = &adapter->hw;
2195         struct e1000_buffer *buffer_info;
2196         struct pci_dev *pdev = adapter->pdev;
2197         unsigned long size;
2198         unsigned int i;
2199
2200         /* Free all the Rx ring sk_buffs */
2201         for (i = 0; i < rx_ring->count; i++) {
2202                 buffer_info = &rx_ring->buffer_info[i];
2203                 if (buffer_info->skb) {
2204                         pci_unmap_single(pdev,
2205                                          buffer_info->dma,
2206                                          buffer_info->length,
2207                                          PCI_DMA_FROMDEVICE);
2208
2209                         dev_kfree_skb(buffer_info->skb);
2210                         buffer_info->skb = NULL;
2211                 }
2212         }
2213
2214         size = sizeof(struct e1000_buffer) * rx_ring->count;
2215         memset(rx_ring->buffer_info, 0, size);
2216
2217         /* Zero out the descriptor ring */
2218
2219         memset(rx_ring->desc, 0, rx_ring->size);
2220
2221         rx_ring->next_to_clean = 0;
2222         rx_ring->next_to_use = 0;
2223
2224         writel(0, hw->hw_addr + rx_ring->rdh);
2225         writel(0, hw->hw_addr + rx_ring->rdt);
2226 }
2227
2228 /**
2229  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2230  * @adapter: board private structure
2231  **/
2232
2233 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2234 {
2235         int i;
2236
2237         for (i = 0; i < adapter->num_rx_queues; i++)
2238                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2239 }
2240
2241 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2242  * and memory write and invalidate disabled for certain operations
2243  */
2244 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2245 {
2246         struct e1000_hw *hw = &adapter->hw;
2247         struct net_device *netdev = adapter->netdev;
2248         u32 rctl;
2249
2250         e1000_pci_clear_mwi(hw);
2251
2252         rctl = er32(RCTL);
2253         rctl |= E1000_RCTL_RST;
2254         ew32(RCTL, rctl);
2255         E1000_WRITE_FLUSH();
2256         mdelay(5);
2257
2258         if (netif_running(netdev))
2259                 e1000_clean_all_rx_rings(adapter);
2260 }
2261
2262 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2263 {
2264         struct e1000_hw *hw = &adapter->hw;
2265         struct net_device *netdev = adapter->netdev;
2266         u32 rctl;
2267
2268         rctl = er32(RCTL);
2269         rctl &= ~E1000_RCTL_RST;
2270         ew32(RCTL, rctl);
2271         E1000_WRITE_FLUSH();
2272         mdelay(5);
2273
2274         if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2275                 e1000_pci_set_mwi(hw);
2276
2277         if (netif_running(netdev)) {
2278                 /* No need to loop, because 82542 supports only 1 queue */
2279                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2280                 e1000_configure_rx(adapter);
2281                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2282         }
2283 }
2284
2285 /**
2286  * e1000_set_mac - Change the Ethernet Address of the NIC
2287  * @netdev: network interface device structure
2288  * @p: pointer to an address structure
2289  *
2290  * Returns 0 on success, negative on failure
2291  **/
2292
2293 static int e1000_set_mac(struct net_device *netdev, void *p)
2294 {
2295         struct e1000_adapter *adapter = netdev_priv(netdev);
2296         struct e1000_hw *hw = &adapter->hw;
2297         struct sockaddr *addr = p;
2298
2299         if (!is_valid_ether_addr(addr->sa_data))
2300                 return -EADDRNOTAVAIL;
2301
2302         /* 82542 2.0 needs to be in reset to write receive address registers */
2303
2304         if (hw->mac_type == e1000_82542_rev2_0)
2305                 e1000_enter_82542_rst(adapter);
2306
2307         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2308         memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2309
2310         e1000_rar_set(hw, hw->mac_addr, 0);
2311
2312         /* With 82571 controllers, LAA may be overwritten (with the default)
2313          * due to controller reset from the other port. */
2314         if (hw->mac_type == e1000_82571) {
2315                 /* activate the work around */
2316                 hw->laa_is_present = 1;
2317
2318                 /* Hold a copy of the LAA in RAR[14] This is done so that
2319                  * between the time RAR[0] gets clobbered  and the time it
2320                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2321                  * of the RARs and no incoming packets directed to this port
2322                  * are dropped. Eventaully the LAA will be in RAR[0] and
2323                  * RAR[14] */
2324                 e1000_rar_set(hw, hw->mac_addr,
2325                                         E1000_RAR_ENTRIES - 1);
2326         }
2327
2328         if (hw->mac_type == e1000_82542_rev2_0)
2329                 e1000_leave_82542_rst(adapter);
2330
2331         return 0;
2332 }
2333
2334 /**
2335  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2336  * @netdev: network interface device structure
2337  *
2338  * The set_rx_mode entry point is called whenever the unicast or multicast
2339  * address lists or the network interface flags are updated. This routine is
2340  * responsible for configuring the hardware for proper unicast, multicast,
2341  * promiscuous mode, and all-multi behavior.
2342  **/
2343
2344 static void e1000_set_rx_mode(struct net_device *netdev)
2345 {
2346         struct e1000_adapter *adapter = netdev_priv(netdev);
2347         struct e1000_hw *hw = &adapter->hw;
2348         struct dev_addr_list *uc_ptr;
2349         struct dev_addr_list *mc_ptr;
2350         u32 rctl;
2351         u32 hash_value;
2352         int i, rar_entries = E1000_RAR_ENTRIES;
2353         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2354                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2355                                 E1000_NUM_MTA_REGISTERS;
2356
2357         if (hw->mac_type == e1000_ich8lan)
2358                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2359
2360         /* reserve RAR[14] for LAA over-write work-around */
2361         if (hw->mac_type == e1000_82571)
2362                 rar_entries--;
2363
2364         /* Check for Promiscuous and All Multicast modes */
2365
2366         rctl = er32(RCTL);
2367
2368         if (netdev->flags & IFF_PROMISC) {
2369                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2370                 rctl &= ~E1000_RCTL_VFE;
2371         } else {
2372                 if (netdev->flags & IFF_ALLMULTI) {
2373                         rctl |= E1000_RCTL_MPE;
2374                 } else {
2375                         rctl &= ~E1000_RCTL_MPE;
2376                 }
2377                 if (adapter->hw.mac_type != e1000_ich8lan)
2378                         rctl |= E1000_RCTL_VFE;
2379         }
2380
2381         uc_ptr = NULL;
2382         if (netdev->uc_count > rar_entries - 1) {
2383                 rctl |= E1000_RCTL_UPE;
2384         } else if (!(netdev->flags & IFF_PROMISC)) {
2385                 rctl &= ~E1000_RCTL_UPE;
2386                 uc_ptr = netdev->uc_list;
2387         }
2388
2389         ew32(RCTL, rctl);
2390
2391         /* 82542 2.0 needs to be in reset to write receive address registers */
2392
2393         if (hw->mac_type == e1000_82542_rev2_0)
2394                 e1000_enter_82542_rst(adapter);
2395
2396         /* load the first 14 addresses into the exact filters 1-14. Unicast
2397          * addresses take precedence to avoid disabling unicast filtering
2398          * when possible.
2399          *
2400          * RAR 0 is used for the station MAC adddress
2401          * if there are not 14 addresses, go ahead and clear the filters
2402          * -- with 82571 controllers only 0-13 entries are filled here
2403          */
2404         mc_ptr = netdev->mc_list;
2405
2406         for (i = 1; i < rar_entries; i++) {
2407                 if (uc_ptr) {
2408                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2409                         uc_ptr = uc_ptr->next;
2410                 } else if (mc_ptr) {
2411                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2412                         mc_ptr = mc_ptr->next;
2413                 } else {
2414                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2415                         E1000_WRITE_FLUSH();
2416                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2417                         E1000_WRITE_FLUSH();
2418                 }
2419         }
2420         WARN_ON(uc_ptr != NULL);
2421
2422         /* clear the old settings from the multicast hash table */
2423
2424         for (i = 0; i < mta_reg_count; i++) {
2425                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2426                 E1000_WRITE_FLUSH();
2427         }
2428
2429         /* load any remaining addresses into the hash table */
2430
2431         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2432                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2433                 e1000_mta_set(hw, hash_value);
2434         }
2435
2436         if (hw->mac_type == e1000_82542_rev2_0)
2437                 e1000_leave_82542_rst(adapter);
2438 }
2439
2440 /* Need to wait a few seconds after link up to get diagnostic information from
2441  * the phy */
2442
2443 static void e1000_update_phy_info(unsigned long data)
2444 {
2445         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2446         struct e1000_hw *hw = &adapter->hw;
2447         e1000_phy_get_info(hw, &adapter->phy_info);
2448 }
2449
2450 /**
2451  * e1000_82547_tx_fifo_stall - Timer Call-back
2452  * @data: pointer to adapter cast into an unsigned long
2453  **/
2454
2455 static void e1000_82547_tx_fifo_stall(unsigned long data)
2456 {
2457         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2458         struct e1000_hw *hw = &adapter->hw;
2459         struct net_device *netdev = adapter->netdev;
2460         u32 tctl;
2461
2462         if (atomic_read(&adapter->tx_fifo_stall)) {
2463                 if ((er32(TDT) == er32(TDH)) &&
2464                    (er32(TDFT) == er32(TDFH)) &&
2465                    (er32(TDFTS) == er32(TDFHS))) {
2466                         tctl = er32(TCTL);
2467                         ew32(TCTL, tctl & ~E1000_TCTL_EN);
2468                         ew32(TDFT, adapter->tx_head_addr);
2469                         ew32(TDFH, adapter->tx_head_addr);
2470                         ew32(TDFTS, adapter->tx_head_addr);
2471                         ew32(TDFHS, adapter->tx_head_addr);
2472                         ew32(TCTL, tctl);
2473                         E1000_WRITE_FLUSH();
2474
2475                         adapter->tx_fifo_head = 0;
2476                         atomic_set(&adapter->tx_fifo_stall, 0);
2477                         netif_wake_queue(netdev);
2478                 } else {
2479                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2480                 }
2481         }
2482 }
2483
2484 /**
2485  * e1000_watchdog - Timer Call-back
2486  * @data: pointer to adapter cast into an unsigned long
2487  **/
2488 static void e1000_watchdog(unsigned long data)
2489 {
2490         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2491         struct e1000_hw *hw = &adapter->hw;
2492         struct net_device *netdev = adapter->netdev;
2493         struct e1000_tx_ring *txdr = adapter->tx_ring;
2494         u32 link, tctl;
2495         s32 ret_val;
2496
2497         ret_val = e1000_check_for_link(hw);
2498         if ((ret_val == E1000_ERR_PHY) &&
2499             (hw->phy_type == e1000_phy_igp_3) &&
2500             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2501                 /* See e1000_kumeran_lock_loss_workaround() */
2502                 DPRINTK(LINK, INFO,
2503                         "Gigabit has been disabled, downgrading speed\n");
2504         }
2505
2506         if (hw->mac_type == e1000_82573) {
2507                 e1000_enable_tx_pkt_filtering(hw);
2508                 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2509                         e1000_update_mng_vlan(adapter);
2510         }
2511
2512         if ((hw->media_type == e1000_media_type_internal_serdes) &&
2513            !(er32(TXCW) & E1000_TXCW_ANE))
2514                 link = !hw->serdes_link_down;
2515         else
2516                 link = er32(STATUS) & E1000_STATUS_LU;
2517
2518         if (link) {
2519                 if (!netif_carrier_ok(netdev)) {
2520                         u32 ctrl;
2521                         bool txb2b = true;
2522                         e1000_get_speed_and_duplex(hw,
2523                                                    &adapter->link_speed,
2524                                                    &adapter->link_duplex);
2525
2526                         ctrl = er32(CTRL);
2527                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2528                                 "Flow Control: %s\n",
2529                                 adapter->link_speed,
2530                                 adapter->link_duplex == FULL_DUPLEX ?
2531                                 "Full Duplex" : "Half Duplex",
2532                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2533                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2534                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2535                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2536
2537                         /* tweak tx_queue_len according to speed/duplex
2538                          * and adjust the timeout factor */
2539                         netdev->tx_queue_len = adapter->tx_queue_len;
2540                         adapter->tx_timeout_factor = 1;
2541                         switch (adapter->link_speed) {
2542                         case SPEED_10:
2543                                 txb2b = false;
2544                                 netdev->tx_queue_len = 10;
2545                                 adapter->tx_timeout_factor = 8;
2546                                 break;
2547                         case SPEED_100:
2548                                 txb2b = false;
2549                                 netdev->tx_queue_len = 100;
2550                                 /* maybe add some timeout factor ? */
2551                                 break;
2552                         }
2553
2554                         if ((hw->mac_type == e1000_82571 ||
2555                              hw->mac_type == e1000_82572) &&
2556                             !txb2b) {
2557                                 u32 tarc0;
2558                                 tarc0 = er32(TARC0);
2559                                 tarc0 &= ~(1 << 21);
2560                                 ew32(TARC0, tarc0);
2561                         }
2562
2563                         /* disable TSO for pcie and 10/100 speeds, to avoid
2564                          * some hardware issues */
2565                         if (!adapter->tso_force &&
2566                             hw->bus_type == e1000_bus_type_pci_express){
2567                                 switch (adapter->link_speed) {
2568                                 case SPEED_10:
2569                                 case SPEED_100:
2570                                         DPRINTK(PROBE,INFO,
2571                                         "10/100 speed: disabling TSO\n");
2572                                         netdev->features &= ~NETIF_F_TSO;
2573                                         netdev->features &= ~NETIF_F_TSO6;
2574                                         break;
2575                                 case SPEED_1000:
2576                                         netdev->features |= NETIF_F_TSO;
2577                                         netdev->features |= NETIF_F_TSO6;
2578                                         break;
2579                                 default:
2580                                         /* oops */
2581                                         break;
2582                                 }
2583                         }
2584
2585                         /* enable transmits in the hardware, need to do this
2586                          * after setting TARC0 */
2587                         tctl = er32(TCTL);
2588                         tctl |= E1000_TCTL_EN;
2589                         ew32(TCTL, tctl);
2590
2591                         netif_carrier_on(netdev);
2592                         netif_wake_queue(netdev);
2593                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2594                         adapter->smartspeed = 0;
2595                 } else {
2596                         /* make sure the receive unit is started */
2597                         if (hw->rx_needs_kicking) {
2598                                 u32 rctl = er32(RCTL);
2599                                 ew32(RCTL, rctl | E1000_RCTL_EN);
2600                         }
2601                 }
2602         } else {
2603                 if (netif_carrier_ok(netdev)) {
2604                         adapter->link_speed = 0;
2605                         adapter->link_duplex = 0;
2606                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2607                         netif_carrier_off(netdev);
2608                         netif_stop_queue(netdev);
2609                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2610
2611                         /* 80003ES2LAN workaround--
2612                          * For packet buffer work-around on link down event;
2613                          * disable receives in the ISR and
2614                          * reset device here in the watchdog
2615                          */
2616                         if (hw->mac_type == e1000_80003es2lan)
2617                                 /* reset device */
2618                                 schedule_work(&adapter->reset_task);
2619                 }
2620
2621                 e1000_smartspeed(adapter);
2622         }
2623
2624         e1000_update_stats(adapter);
2625
2626         hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2627         adapter->tpt_old = adapter->stats.tpt;
2628         hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2629         adapter->colc_old = adapter->stats.colc;
2630
2631         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2632         adapter->gorcl_old = adapter->stats.gorcl;
2633         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2634         adapter->gotcl_old = adapter->stats.gotcl;
2635
2636         e1000_update_adaptive(hw);
2637
2638         if (!netif_carrier_ok(netdev)) {
2639                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2640                         /* We've lost link, so the controller stops DMA,
2641                          * but we've got queued Tx work that's never going
2642                          * to get done, so reset controller to flush Tx.
2643                          * (Do the reset outside of interrupt context). */
2644                         adapter->tx_timeout_count++;
2645                         schedule_work(&adapter->reset_task);
2646                 }
2647         }
2648
2649         /* Cause software interrupt to ensure rx ring is cleaned */
2650         ew32(ICS, E1000_ICS_RXDMT0);
2651
2652         /* Force detection of hung controller every watchdog period */
2653         adapter->detect_tx_hung = true;
2654
2655         /* With 82571 controllers, LAA may be overwritten due to controller
2656          * reset from the other port. Set the appropriate LAA in RAR[0] */
2657         if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2658                 e1000_rar_set(hw, hw->mac_addr, 0);
2659
2660         /* Reset the timer */
2661         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2662 }
2663
2664 enum latency_range {
2665         lowest_latency = 0,
2666         low_latency = 1,
2667         bulk_latency = 2,
2668         latency_invalid = 255
2669 };
2670
2671 /**
2672  * e1000_update_itr - update the dynamic ITR value based on statistics
2673  *      Stores a new ITR value based on packets and byte
2674  *      counts during the last interrupt.  The advantage of per interrupt
2675  *      computation is faster updates and more accurate ITR for the current
2676  *      traffic pattern.  Constants in this function were computed
2677  *      based on theoretical maximum wire speed and thresholds were set based
2678  *      on testing data as well as attempting to minimize response time
2679  *      while increasing bulk throughput.
2680  *      this functionality is controlled by the InterruptThrottleRate module
2681  *      parameter (see e1000_param.c)
2682  * @adapter: pointer to adapter
2683  * @itr_setting: current adapter->itr
2684  * @packets: the number of packets during this measurement interval
2685  * @bytes: the number of bytes during this measurement interval
2686  **/
2687 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2688                                      u16 itr_setting, int packets, int bytes)
2689 {
2690         unsigned int retval = itr_setting;
2691         struct e1000_hw *hw = &adapter->hw;
2692
2693         if (unlikely(hw->mac_type < e1000_82540))
2694                 goto update_itr_done;
2695
2696         if (packets == 0)
2697                 goto update_itr_done;
2698
2699         switch (itr_setting) {
2700         case lowest_latency:
2701                 /* jumbo frames get bulk treatment*/
2702                 if (bytes/packets > 8000)
2703                         retval = bulk_latency;
2704                 else if ((packets < 5) && (bytes > 512))
2705                         retval = low_latency;
2706                 break;
2707         case low_latency:  /* 50 usec aka 20000 ints/s */
2708                 if (bytes > 10000) {
2709                         /* jumbo frames need bulk latency setting */
2710                         if (bytes/packets > 8000)
2711                                 retval = bulk_latency;
2712                         else if ((packets < 10) || ((bytes/packets) > 1200))
2713                                 retval = bulk_latency;
2714                         else if ((packets > 35))
2715                                 retval = lowest_latency;
2716                 } else if (bytes/packets > 2000)
2717                         retval = bulk_latency;
2718                 else if (packets <= 2 && bytes < 512)
2719                         retval = lowest_latency;
2720                 break;
2721         case bulk_latency: /* 250 usec aka 4000 ints/s */
2722                 if (bytes > 25000) {
2723                         if (packets > 35)
2724                                 retval = low_latency;
2725                 } else if (bytes < 6000) {
2726                         retval = low_latency;
2727                 }
2728                 break;
2729         }
2730
2731 update_itr_done:
2732         return retval;
2733 }
2734
2735 static void e1000_set_itr(struct e1000_adapter *adapter)
2736 {
2737         struct e1000_hw *hw = &adapter->hw;
2738         u16 current_itr;
2739         u32 new_itr = adapter->itr;
2740
2741         if (unlikely(hw->mac_type < e1000_82540))
2742                 return;
2743
2744         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2745         if (unlikely(adapter->link_speed != SPEED_1000)) {
2746                 current_itr = 0;
2747                 new_itr = 4000;
2748                 goto set_itr_now;
2749         }
2750
2751         adapter->tx_itr = e1000_update_itr(adapter,
2752                                     adapter->tx_itr,
2753                                     adapter->total_tx_packets,
2754                                     adapter->total_tx_bytes);
2755         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2756         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2757                 adapter->tx_itr = low_latency;
2758
2759         adapter->rx_itr = e1000_update_itr(adapter,
2760                                     adapter->rx_itr,
2761                                     adapter->total_rx_packets,
2762                                     adapter->total_rx_bytes);
2763         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2764         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2765                 adapter->rx_itr = low_latency;
2766
2767         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2768
2769         switch (current_itr) {
2770         /* counts and packets in update_itr are dependent on these numbers */
2771         case lowest_latency:
2772                 new_itr = 70000;
2773                 break;
2774         case low_latency:
2775                 new_itr = 20000; /* aka hwitr = ~200 */
2776                 break;
2777         case bulk_latency:
2778                 new_itr = 4000;
2779                 break;
2780         default:
2781                 break;
2782         }
2783
2784 set_itr_now:
2785         if (new_itr != adapter->itr) {
2786                 /* this attempts to bias the interrupt rate towards Bulk
2787                  * by adding intermediate steps when interrupt rate is
2788                  * increasing */
2789                 new_itr = new_itr > adapter->itr ?
2790                              min(adapter->itr + (new_itr >> 2), new_itr) :
2791                              new_itr;
2792                 adapter->itr = new_itr;
2793                 ew32(ITR, 1000000000 / (new_itr * 256));
2794         }
2795
2796         return;
2797 }
2798
2799 #define E1000_TX_FLAGS_CSUM             0x00000001
2800 #define E1000_TX_FLAGS_VLAN             0x00000002
2801 #define E1000_TX_FLAGS_TSO              0x00000004
2802 #define E1000_TX_FLAGS_IPV4             0x00000008
2803 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2804 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2805
2806 static int e1000_tso(struct e1000_adapter *adapter,
2807                      struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2808 {
2809         struct e1000_context_desc *context_desc;
2810         struct e1000_buffer *buffer_info;
2811         unsigned int i;
2812         u32 cmd_length = 0;
2813         u16 ipcse = 0, tucse, mss;
2814         u8 ipcss, ipcso, tucss, tucso, hdr_len;
2815         int err;
2816
2817         if (skb_is_gso(skb)) {
2818                 if (skb_header_cloned(skb)) {
2819                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2820                         if (err)
2821                                 return err;
2822                 }
2823
2824                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2825                 mss = skb_shinfo(skb)->gso_size;
2826                 if (skb->protocol == htons(ETH_P_IP)) {
2827                         struct iphdr *iph = ip_hdr(skb);
2828                         iph->tot_len = 0;
2829                         iph->check = 0;
2830                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2831                                                                  iph->daddr, 0,
2832                                                                  IPPROTO_TCP,
2833                                                                  0);
2834                         cmd_length = E1000_TXD_CMD_IP;
2835                         ipcse = skb_transport_offset(skb) - 1;
2836                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2837                         ipv6_hdr(skb)->payload_len = 0;
2838                         tcp_hdr(skb)->check =
2839                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2840                                                  &ipv6_hdr(skb)->daddr,
2841                                                  0, IPPROTO_TCP, 0);
2842                         ipcse = 0;
2843                 }
2844                 ipcss = skb_network_offset(skb);
2845                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2846                 tucss = skb_transport_offset(skb);
2847                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2848                 tucse = 0;
2849
2850                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2851                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2852
2853                 i = tx_ring->next_to_use;
2854                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2855                 buffer_info = &tx_ring->buffer_info[i];
2856
2857                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2858                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2859                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2860                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2861                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2862                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2863                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2864                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2865                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2866
2867                 buffer_info->time_stamp = jiffies;
2868                 buffer_info->next_to_watch = i;
2869
2870                 if (++i == tx_ring->count) i = 0;
2871                 tx_ring->next_to_use = i;
2872
2873                 return true;
2874         }
2875         return false;
2876 }
2877
2878 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2879                           struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2880 {
2881         struct e1000_context_desc *context_desc;
2882         struct e1000_buffer *buffer_info;
2883         unsigned int i;
2884         u8 css;
2885         u32 cmd_len = E1000_TXD_CMD_DEXT;
2886
2887         if (skb->ip_summed != CHECKSUM_PARTIAL)
2888                 return false;
2889
2890         switch (skb->protocol) {
2891         case __constant_htons(ETH_P_IP):
2892                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2893                         cmd_len |= E1000_TXD_CMD_TCP;
2894                 break;
2895         case __constant_htons(ETH_P_IPV6):
2896                 /* XXX not handling all IPV6 headers */
2897                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2898                         cmd_len |= E1000_TXD_CMD_TCP;
2899                 break;
2900         default:
2901                 if (unlikely(net_ratelimit()))
2902                         DPRINTK(DRV, WARNING,
2903                                 "checksum_partial proto=%x!\n", skb->protocol);
2904                 break;
2905         }
2906
2907         css = skb_transport_offset(skb);
2908
2909         i = tx_ring->next_to_use;
2910         buffer_info = &tx_ring->buffer_info[i];
2911         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2912
2913         context_desc->lower_setup.ip_config = 0;
2914         context_desc->upper_setup.tcp_fields.tucss = css;
2915         context_desc->upper_setup.tcp_fields.tucso =
2916                 css + skb->csum_offset;
2917         context_desc->upper_setup.tcp_fields.tucse = 0;
2918         context_desc->tcp_seg_setup.data = 0;
2919         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2920
2921         buffer_info->time_stamp = jiffies;
2922         buffer_info->next_to_watch = i;
2923
2924         if (unlikely(++i == tx_ring->count)) i = 0;
2925         tx_ring->next_to_use = i;
2926
2927         return true;
2928 }
2929
2930 #define E1000_MAX_TXD_PWR       12
2931 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2932
2933 static int e1000_tx_map(struct e1000_adapter *adapter,
2934                         struct e1000_tx_ring *tx_ring,
2935                         struct sk_buff *skb, unsigned int first,
2936                         unsigned int max_per_txd, unsigned int nr_frags,
2937                         unsigned int mss)
2938 {
2939         struct e1000_hw *hw = &adapter->hw;
2940         struct e1000_buffer *buffer_info;
2941         unsigned int len = skb->len;
2942         unsigned int offset = 0, size, count = 0, i;
2943         unsigned int f;
2944         len -= skb->data_len;
2945
2946         i = tx_ring->next_to_use;
2947
2948         while (len) {
2949                 buffer_info = &tx_ring->buffer_info[i];
2950                 size = min(len, max_per_txd);
2951                 /* Workaround for Controller erratum --
2952                  * descriptor for non-tso packet in a linear SKB that follows a
2953                  * tso gets written back prematurely before the data is fully
2954                  * DMA'd to the controller */
2955                 if (!skb->data_len && tx_ring->last_tx_tso &&
2956                     !skb_is_gso(skb)) {
2957                         tx_ring->last_tx_tso = 0;
2958                         size -= 4;
2959                 }
2960
2961                 /* Workaround for premature desc write-backs
2962                  * in TSO mode.  Append 4-byte sentinel desc */
2963                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2964                         size -= 4;
2965                 /* work-around for errata 10 and it applies
2966                  * to all controllers in PCI-X mode
2967                  * The fix is to make sure that the first descriptor of a
2968                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2969                  */
2970                 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2971                                 (size > 2015) && count == 0))
2972                         size = 2015;
2973
2974                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2975                  * terminating buffers within evenly-aligned dwords. */
2976                 if (unlikely(adapter->pcix_82544 &&
2977                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2978                    size > 4))
2979                         size -= 4;
2980
2981                 buffer_info->length = size;
2982                 buffer_info->dma =
2983                         pci_map_single(adapter->pdev,
2984                                 skb->data + offset,
2985                                 size,
2986                                 PCI_DMA_TODEVICE);
2987                 buffer_info->time_stamp = jiffies;
2988                 buffer_info->next_to_watch = i;
2989
2990                 len -= size;
2991                 offset += size;
2992                 count++;
2993                 if (unlikely(++i == tx_ring->count)) i = 0;
2994         }
2995
2996         for (f = 0; f < nr_frags; f++) {
2997                 struct skb_frag_struct *frag;
2998
2999                 frag = &skb_shinfo(skb)->frags[f];
3000                 len = frag->size;
3001                 offset = frag->page_offset;
3002
3003                 while (len) {
3004                         buffer_info = &tx_ring->buffer_info[i];
3005                         size = min(len, max_per_txd);
3006                         /* Workaround for premature desc write-backs
3007                          * in TSO mode.  Append 4-byte sentinel desc */
3008                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3009                                 size -= 4;
3010                         /* Workaround for potential 82544 hang in PCI-X.
3011                          * Avoid terminating buffers within evenly-aligned
3012                          * dwords. */
3013                         if (unlikely(adapter->pcix_82544 &&
3014                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3015                            size > 4))
3016                                 size -= 4;
3017
3018                         buffer_info->length = size;
3019                         buffer_info->dma =
3020                                 pci_map_page(adapter->pdev,
3021                                         frag->page,
3022                                         offset,
3023                                         size,
3024                                         PCI_DMA_TODEVICE);
3025                         buffer_info->time_stamp = jiffies;
3026                         buffer_info->next_to_watch = i;
3027
3028                         len -= size;
3029                         offset += size;
3030                         count++;
3031                         if (unlikely(++i == tx_ring->count)) i = 0;
3032                 }
3033         }
3034
3035         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3036         tx_ring->buffer_info[i].skb = skb;
3037         tx_ring->buffer_info[first].next_to_watch = i;
3038
3039         return count;
3040 }
3041
3042 static void e1000_tx_queue(struct e1000_adapter *adapter,
3043                            struct e1000_tx_ring *tx_ring, int tx_flags,
3044                            int count)
3045 {
3046         struct e1000_hw *hw = &adapter->hw;
3047         struct e1000_tx_desc *tx_desc = NULL;
3048         struct e1000_buffer *buffer_info;
3049         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3050         unsigned int i;
3051
3052         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3053                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3054                              E1000_TXD_CMD_TSE;
3055                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3056
3057                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3058                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3059         }
3060
3061         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3062                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3063                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3064         }
3065
3066         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3067                 txd_lower |= E1000_TXD_CMD_VLE;
3068                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3069         }
3070
3071         i = tx_ring->next_to_use;
3072
3073         while (count--) {
3074                 buffer_info = &tx_ring->buffer_info[i];
3075                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3076                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3077                 tx_desc->lower.data =
3078                         cpu_to_le32(txd_lower | buffer_info->length);
3079                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3080                 if (unlikely(++i == tx_ring->count)) i = 0;
3081         }
3082
3083         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3084
3085         /* Force memory writes to complete before letting h/w
3086          * know there are new descriptors to fetch.  (Only
3087          * applicable for weak-ordered memory model archs,
3088          * such as IA-64). */
3089         wmb();
3090
3091         tx_ring->next_to_use = i;
3092         writel(i, hw->hw_addr + tx_ring->tdt);
3093         /* we need this if more than one processor can write to our tail
3094          * at a time, it syncronizes IO on IA64/Altix systems */
3095         mmiowb();
3096 }
3097
3098 /**
3099  * 82547 workaround to avoid controller hang in half-duplex environment.
3100  * The workaround is to avoid queuing a large packet that would span
3101  * the internal Tx FIFO ring boundary by notifying the stack to resend
3102  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3103  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3104  * to the beginning of the Tx FIFO.
3105  **/
3106
3107 #define E1000_FIFO_HDR                  0x10
3108 #define E1000_82547_PAD_LEN             0x3E0
3109
3110 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3111                                        struct sk_buff *skb)
3112 {
3113         u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3114         u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3115
3116         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3117
3118         if (adapter->link_duplex != HALF_DUPLEX)
3119                 goto no_fifo_stall_required;
3120
3121         if (atomic_read(&adapter->tx_fifo_stall))
3122                 return 1;
3123
3124         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3125                 atomic_set(&adapter->tx_fifo_stall, 1);
3126                 return 1;
3127         }
3128
3129 no_fifo_stall_required:
3130         adapter->tx_fifo_head += skb_fifo_len;
3131         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3132                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3133         return 0;
3134 }
3135
3136 #define MINIMUM_DHCP_PACKET_SIZE 282
3137 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3138                                     struct sk_buff *skb)
3139 {
3140         struct e1000_hw *hw =  &adapter->hw;
3141         u16 length, offset;
3142         if (vlan_tx_tag_present(skb)) {
3143                 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3144                         ( hw->mng_cookie.status &
3145                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3146                         return 0;
3147         }
3148         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3149                 struct ethhdr *eth = (struct ethhdr *)skb->data;
3150                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3151                         const struct iphdr *ip =
3152                                 (struct iphdr *)((u8 *)skb->data+14);
3153                         if (IPPROTO_UDP == ip->protocol) {
3154                                 struct udphdr *udp =
3155                                         (struct udphdr *)((u8 *)ip +
3156                                                 (ip->ihl << 2));
3157                                 if (ntohs(udp->dest) == 67) {
3158                                         offset = (u8 *)udp + 8 - skb->data;
3159                                         length = skb->len - offset;
3160
3161                                         return e1000_mng_write_dhcp_info(hw,
3162                                                         (u8 *)udp + 8,
3163                                                         length);
3164                                 }
3165                         }
3166                 }
3167         }
3168         return 0;
3169 }
3170
3171 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3172 {
3173         struct e1000_adapter *adapter = netdev_priv(netdev);
3174         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3175
3176         netif_stop_queue(netdev);
3177         /* Herbert's original patch had:
3178          *  smp_mb__after_netif_stop_queue();
3179          * but since that doesn't exist yet, just open code it. */
3180         smp_mb();
3181
3182         /* We need to check again in a case another CPU has just
3183          * made room available. */
3184         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3185                 return -EBUSY;
3186
3187         /* A reprieve! */
3188         netif_start_queue(netdev);
3189         ++adapter->restart_queue;
3190         return 0;
3191 }
3192
3193 static int e1000_maybe_stop_tx(struct net_device *netdev,
3194                                struct e1000_tx_ring *tx_ring, int size)
3195 {
3196         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3197                 return 0;
3198         return __e1000_maybe_stop_tx(netdev, size);
3199 }
3200
3201 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3202 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3203 {
3204         struct e1000_adapter *adapter = netdev_priv(netdev);
3205         struct e1000_hw *hw = &adapter->hw;
3206         struct e1000_tx_ring *tx_ring;
3207         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3208         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3209         unsigned int tx_flags = 0;
3210         unsigned int len = skb->len - skb->data_len;
3211         unsigned long flags;
3212         unsigned int nr_frags;
3213         unsigned int mss;
3214         int count = 0;
3215         int tso;
3216         unsigned int f;
3217
3218         /* This goes back to the question of how to logically map a tx queue
3219          * to a flow.  Right now, performance is impacted slightly negatively
3220          * if using multiple tx queues.  If the stack breaks away from a
3221          * single qdisc implementation, we can look at this again. */
3222         tx_ring = adapter->tx_ring;
3223
3224         if (unlikely(skb->len <= 0)) {
3225                 dev_kfree_skb_any(skb);
3226                 return NETDEV_TX_OK;
3227         }
3228
3229         /* 82571 and newer doesn't need the workaround that limited descriptor
3230          * length to 4kB */
3231         if (hw->mac_type >= e1000_82571)
3232                 max_per_txd = 8192;
3233
3234         mss = skb_shinfo(skb)->gso_size;
3235         /* The controller does a simple calculation to
3236          * make sure there is enough room in the FIFO before
3237          * initiating the DMA for each buffer.  The calc is:
3238          * 4 = ceil(buffer len/mss).  To make sure we don't
3239          * overrun the FIFO, adjust the max buffer len if mss
3240          * drops. */
3241         if (mss) {
3242                 u8 hdr_len;
3243                 max_per_txd = min(mss << 2, max_per_txd);
3244                 max_txd_pwr = fls(max_per_txd) - 1;
3245
3246                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3247                 * points to just header, pull a few bytes of payload from
3248                 * frags into skb->data */
3249                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3250                 if (skb->data_len && hdr_len == len) {
3251                         switch (hw->mac_type) {
3252                                 unsigned int pull_size;
3253                         case e1000_82544:
3254                                 /* Make sure we have room to chop off 4 bytes,
3255                                  * and that the end alignment will work out to
3256                                  * this hardware's requirements
3257                                  * NOTE: this is a TSO only workaround
3258                                  * if end byte alignment not correct move us
3259                                  * into the next dword */
3260                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3261                                         break;
3262                                 /* fall through */
3263                         case e1000_82571:
3264                         case e1000_82572:
3265                         case e1000_82573:
3266                         case e1000_ich8lan:
3267                                 pull_size = min((unsigned int)4, skb->data_len);
3268                                 if (!__pskb_pull_tail(skb, pull_size)) {
3269                                         DPRINTK(DRV, ERR,
3270                                                 "__pskb_pull_tail failed.\n");
3271                                         dev_kfree_skb_any(skb);
3272                                         return NETDEV_TX_OK;
3273                                 }
3274                                 len = skb->len - skb->data_len;
3275                                 break;
3276                         default:
3277                                 /* do nothing */
3278                                 break;
3279                         }
3280                 }
3281         }
3282
3283         /* reserve a descriptor for the offload context */
3284         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3285                 count++;
3286         count++;
3287
3288         /* Controller Erratum workaround */
3289         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3290                 count++;
3291
3292         count += TXD_USE_COUNT(len, max_txd_pwr);
3293
3294         if (adapter->pcix_82544)
3295                 count++;
3296
3297         /* work-around for errata 10 and it applies to all controllers
3298          * in PCI-X mode, so add one more descriptor to the count
3299          */
3300         if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3301                         (len > 2015)))
3302                 count++;
3303
3304         nr_frags = skb_shinfo(skb)->nr_frags;
3305         for (f = 0; f < nr_frags; f++)
3306                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3307                                        max_txd_pwr);
3308         if (adapter->pcix_82544)
3309                 count += nr_frags;
3310
3311
3312         if (hw->tx_pkt_filtering &&
3313             (hw->mac_type == e1000_82573))
3314                 e1000_transfer_dhcp_info(adapter, skb);
3315
3316         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3317                 /* Collision - tell upper layer to requeue */
3318                 return NETDEV_TX_LOCKED;
3319
3320         /* need: count + 2 desc gap to keep tail from touching
3321          * head, otherwise try next time */
3322         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3323                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3324                 return NETDEV_TX_BUSY;
3325         }
3326
3327         if (unlikely(hw->mac_type == e1000_82547)) {
3328                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3329                         netif_stop_queue(netdev);
3330                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3331                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3332                         return NETDEV_TX_BUSY;
3333                 }
3334         }
3335
3336         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3337                 tx_flags |= E1000_TX_FLAGS_VLAN;
3338                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3339         }
3340
3341         first = tx_ring->next_to_use;
3342
3343         tso = e1000_tso(adapter, tx_ring, skb);
3344         if (tso < 0) {
3345                 dev_kfree_skb_any(skb);
3346                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3347                 return NETDEV_TX_OK;
3348         }
3349
3350         if (likely(tso)) {
3351                 tx_ring->last_tx_tso = 1;
3352                 tx_flags |= E1000_TX_FLAGS_TSO;
3353         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3354                 tx_flags |= E1000_TX_FLAGS_CSUM;
3355
3356         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3357          * 82571 hardware supports TSO capabilities for IPv6 as well...
3358          * no longer assume, we must. */
3359         if (likely(skb->protocol == htons(ETH_P_IP)))
3360                 tx_flags |= E1000_TX_FLAGS_IPV4;
3361
3362         e1000_tx_queue(adapter, tx_ring, tx_flags,
3363                        e1000_tx_map(adapter, tx_ring, skb, first,
3364                                     max_per_txd, nr_frags, mss));
3365
3366         netdev->trans_start = jiffies;
3367
3368         /* Make sure there is space in the ring for the next send. */
3369         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3370
3371         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3372         return NETDEV_TX_OK;
3373 }
3374
3375 /**
3376  * e1000_tx_timeout - Respond to a Tx Hang
3377  * @netdev: network interface device structure
3378  **/
3379
3380 static void e1000_tx_timeout(struct net_device *netdev)
3381 {
3382         struct e1000_adapter *adapter = netdev_priv(netdev);
3383
3384         /* Do the reset outside of interrupt context */
3385         adapter->tx_timeout_count++;
3386         schedule_work(&adapter->reset_task);
3387 }
3388
3389 static void e1000_reset_task(struct work_struct *work)
3390 {
3391         struct e1000_adapter *adapter =
3392                 container_of(work, struct e1000_adapter, reset_task);
3393
3394         e1000_reinit_locked(adapter);
3395 }
3396
3397 /**
3398  * e1000_get_stats - Get System Network Statistics
3399  * @netdev: network interface device structure
3400  *
3401  * Returns the address of the device statistics structure.
3402  * The statistics are actually updated from the timer callback.
3403  **/
3404
3405 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3406 {
3407         struct e1000_adapter *adapter = netdev_priv(netdev);
3408
3409         /* only return the current stats */
3410         return &adapter->net_stats;
3411 }
3412
3413 /**
3414  * e1000_change_mtu - Change the Maximum Transfer Unit
3415  * @netdev: network interface device structure
3416  * @new_mtu: new value for maximum frame size
3417  *
3418  * Returns 0 on success, negative on failure
3419  **/
3420
3421 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3422 {
3423         struct e1000_adapter *adapter = netdev_priv(netdev);
3424         struct e1000_hw *hw = &adapter->hw;
3425         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3426         u16 eeprom_data = 0;
3427
3428         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3429             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3430                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3431                 return -EINVAL;
3432         }
3433
3434         /* Adapter-specific max frame size limits. */
3435         switch (hw->mac_type) {
3436         case e1000_undefined ... e1000_82542_rev2_1:
3437         case e1000_ich8lan:
3438                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3439                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3440                         return -EINVAL;
3441                 }
3442                 break;
3443         case e1000_82573:
3444                 /* Jumbo Frames not supported if:
3445                  * - this is not an 82573L device
3446                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3447                 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3448                                   &eeprom_data);
3449                 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3450                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3451                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3452                                 DPRINTK(PROBE, ERR,
3453                                         "Jumbo Frames not supported.\n");
3454                                 return -EINVAL;
3455                         }
3456                         break;
3457                 }
3458                 /* ERT will be enabled later to enable wire speed receives */
3459
3460                 /* fall through to get support */
3461         case e1000_82571:
3462         case e1000_82572:
3463         case e1000_80003es2lan:
3464 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3465                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3466                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3467                         return -EINVAL;
3468                 }
3469                 break;
3470         default:
3471                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3472                 break;
3473         }
3474
3475         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3476          * means we reserve 2 more, this pushes us to allocate from the next
3477          * larger slab size
3478          * i.e. RXBUFFER_2048 --> size-4096 slab */
3479
3480         if (max_frame <= E1000_RXBUFFER_256)
3481                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3482         else if (max_frame <= E1000_RXBUFFER_512)
3483                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3484         else if (max_frame <= E1000_RXBUFFER_1024)
3485                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3486         else if (max_frame <= E1000_RXBUFFER_2048)
3487                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3488         else if (max_frame <= E1000_RXBUFFER_4096)
3489                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3490         else if (max_frame <= E1000_RXBUFFER_8192)
3491                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3492         else if (max_frame <= E1000_RXBUFFER_16384)
3493                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3494
3495         /* adjust allocation if LPE protects us, and we aren't using SBP */
3496         if (!hw->tbi_compatibility_on &&
3497             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3498              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3499                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3500
3501         netdev->mtu = new_mtu;
3502         hw->max_frame_size = max_frame;
3503
3504         if (netif_running(netdev))
3505                 e1000_reinit_locked(adapter);
3506
3507         return 0;
3508 }
3509
3510 /**
3511  * e1000_update_stats - Update the board statistics counters
3512  * @adapter: board private structure
3513  **/
3514
3515 void e1000_update_stats(struct e1000_adapter *adapter)
3516 {
3517         struct e1000_hw *hw = &adapter->hw;
3518         struct pci_dev *pdev = adapter->pdev;
3519         unsigned long flags;
3520         u16 phy_tmp;
3521
3522 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3523
3524         /*
3525          * Prevent stats update while adapter is being reset, or if the pci
3526          * connection is down.
3527          */
3528         if (adapter->link_speed == 0)
3529                 return;
3530         if (pci_channel_offline(pdev))
3531                 return;
3532
3533         spin_lock_irqsave(&adapter->stats_lock, flags);
3534
3535         /* these counters are modified from e1000_tbi_adjust_stats,
3536          * called from the interrupt context, so they must only
3537          * be written while holding adapter->stats_lock
3538          */
3539
3540         adapter->stats.crcerrs += er32(CRCERRS);
3541         adapter->stats.gprc += er32(GPRC);
3542         adapter->stats.gorcl += er32(GORCL);
3543         adapter->stats.gorch += er32(GORCH);
3544         adapter->stats.bprc += er32(BPRC);
3545         adapter->stats.mprc += er32(MPRC);
3546         adapter->stats.roc += er32(ROC);
3547
3548         if (hw->mac_type != e1000_ich8lan) {
3549                 adapter->stats.prc64 += er32(PRC64);
3550                 adapter->stats.prc127 += er32(PRC127);
3551                 adapter->stats.prc255 += er32(PRC255);
3552                 adapter->stats.prc511 += er32(PRC511);
3553                 adapter->stats.prc1023 += er32(PRC1023);
3554                 adapter->stats.prc1522 += er32(PRC1522);
3555         }
3556
3557         adapter->stats.symerrs += er32(SYMERRS);
3558         adapter->stats.mpc += er32(MPC);
3559         adapter->stats.scc += er32(SCC);
3560         adapter->stats.ecol += er32(ECOL);
3561         adapter->stats.mcc += er32(MCC);
3562         adapter->stats.latecol += er32(LATECOL);
3563         adapter->stats.dc += er32(DC);
3564         adapter->stats.sec += er32(SEC);
3565         adapter->stats.rlec += er32(RLEC);
3566         adapter->stats.xonrxc += er32(XONRXC);
3567         adapter->stats.xontxc += er32(XONTXC);
3568         adapter->stats.xoffrxc += er32(XOFFRXC);
3569         adapter->stats.xofftxc += er32(XOFFTXC);
3570         adapter->stats.fcruc += er32(FCRUC);
3571         adapter->stats.gptc += er32(GPTC);
3572         adapter->stats.gotcl += er32(GOTCL);
3573         adapter->stats.gotch += er32(GOTCH);
3574         adapter->stats.rnbc += er32(RNBC);
3575         adapter->stats.ruc += er32(RUC);
3576         adapter->stats.rfc += er32(RFC);
3577         adapter->stats.rjc += er32(RJC);
3578         adapter->stats.torl += er32(TORL);
3579         adapter->stats.torh += er32(TORH);
3580         adapter->stats.totl += er32(TOTL);
3581         adapter->stats.toth += er32(TOTH);
3582         adapter->stats.tpr += er32(TPR);
3583
3584         if (hw->mac_type != e1000_ich8lan) {
3585                 adapter->stats.ptc64 += er32(PTC64);
3586                 adapter->stats.ptc127 += er32(PTC127);
3587                 adapter->stats.ptc255 += er32(PTC255);
3588                 adapter->stats.ptc511 += er32(PTC511);
3589                 adapter->stats.ptc1023 += er32(PTC1023);
3590                 adapter->stats.ptc1522 += er32(PTC1522);
3591         }
3592
3593         adapter->stats.mptc += er32(MPTC);
3594         adapter->stats.bptc += er32(BPTC);
3595
3596         /* used for adaptive IFS */
3597
3598         hw->tx_packet_delta = er32(TPT);
3599         adapter->stats.tpt += hw->tx_packet_delta;
3600         hw->collision_delta = er32(COLC);
3601         adapter->stats.colc += hw->collision_delta;
3602
3603         if (hw->mac_type >= e1000_82543) {
3604                 adapter->stats.algnerrc += er32(ALGNERRC);
3605                 adapter->stats.rxerrc += er32(RXERRC);
3606                 adapter->stats.tncrs += er32(TNCRS);
3607                 adapter->stats.cexterr += er32(CEXTERR);
3608                 adapter->stats.tsctc += er32(TSCTC);
3609                 adapter->stats.tsctfc += er32(TSCTFC);
3610         }
3611         if (hw->mac_type > e1000_82547_rev_2) {
3612                 adapter->stats.iac += er32(IAC);
3613                 adapter->stats.icrxoc += er32(ICRXOC);
3614
3615                 if (hw->mac_type != e1000_ich8lan) {
3616                         adapter->stats.icrxptc += er32(ICRXPTC);
3617                         adapter->stats.icrxatc += er32(ICRXATC);
3618                         adapter->stats.ictxptc += er32(ICTXPTC);
3619                         adapter->stats.ictxatc += er32(ICTXATC);
3620                         adapter->stats.ictxqec += er32(ICTXQEC);
3621                         adapter->stats.ictxqmtc += er32(ICTXQMTC);
3622                         adapter->stats.icrxdmtc += er32(ICRXDMTC);
3623                 }
3624         }
3625
3626         /* Fill out the OS statistics structure */
3627         adapter->net_stats.multicast = adapter->stats.mprc;
3628         adapter->net_stats.collisions = adapter->stats.colc;
3629
3630         /* Rx Errors */
3631
3632         /* RLEC on some newer hardware can be incorrect so build
3633         * our own version based on RUC and ROC */
3634         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3635                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3636                 adapter->stats.ruc + adapter->stats.roc +
3637                 adapter->stats.cexterr;
3638         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3639         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3640         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3641         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3642         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3643
3644         /* Tx Errors */
3645         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3646         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3647         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3648         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3649         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3650         if (hw->bad_tx_carr_stats_fd &&
3651             adapter->link_duplex == FULL_DUPLEX) {
3652                 adapter->net_stats.tx_carrier_errors = 0;
3653                 adapter->stats.tncrs = 0;
3654         }
3655
3656         /* Tx Dropped needs to be maintained elsewhere */
3657
3658         /* Phy Stats */
3659         if (hw->media_type == e1000_media_type_copper) {
3660                 if ((adapter->link_speed == SPEED_1000) &&
3661                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3662                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3663                         adapter->phy_stats.idle_errors += phy_tmp;
3664                 }
3665
3666                 if ((hw->mac_type <= e1000_82546) &&
3667                    (hw->phy_type == e1000_phy_m88) &&
3668                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3669                         adapter->phy_stats.receive_errors += phy_tmp;
3670         }
3671
3672         /* Management Stats */
3673         if (hw->has_smbus) {
3674                 adapter->stats.mgptc += er32(MGTPTC);
3675                 adapter->stats.mgprc += er32(MGTPRC);
3676                 adapter->stats.mgpdc += er32(MGTPDC);
3677         }
3678
3679         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3680 }
3681
3682 /**
3683  * e1000_intr_msi - Interrupt Handler
3684  * @irq: interrupt number
3685  * @data: pointer to a network interface device structure
3686  **/
3687
3688 static irqreturn_t e1000_intr_msi(int irq, void *data)
3689 {
3690         struct net_device *netdev = data;
3691         struct e1000_adapter *adapter = netdev_priv(netdev);
3692         struct e1000_hw *hw = &adapter->hw;
3693         u32 icr = er32(ICR);
3694
3695         /* in NAPI mode read ICR disables interrupts using IAM */
3696
3697         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3698                 hw->get_link_status = 1;
3699                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3700                  * link down event; disable receives here in the ISR and reset
3701                  * adapter in watchdog */
3702                 if (netif_carrier_ok(netdev) &&
3703                     (hw->mac_type == e1000_80003es2lan)) {
3704                         /* disable receives */
3705                         u32 rctl = er32(RCTL);
3706                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3707                 }
3708                 /* guard against interrupt when we're going down */
3709                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3710                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3711         }
3712
3713         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3714                 adapter->total_tx_bytes = 0;
3715                 adapter->total_tx_packets = 0;
3716                 adapter->total_rx_bytes = 0;
3717                 adapter->total_rx_packets = 0;
3718                 __netif_rx_schedule(netdev, &adapter->napi);
3719         } else
3720                 e1000_irq_enable(adapter);
3721
3722         return IRQ_HANDLED;
3723 }
3724
3725 /**
3726  * e1000_intr - Interrupt Handler
3727  * @irq: interrupt number
3728  * @data: pointer to a network interface device structure
3729  **/
3730
3731 static irqreturn_t e1000_intr(int irq, void *data)
3732 {
3733         struct net_device *netdev = data;
3734         struct e1000_adapter *adapter = netdev_priv(netdev);
3735         struct e1000_hw *hw = &adapter->hw;
3736         u32 rctl, icr = er32(ICR);
3737
3738         if (unlikely(!icr))
3739                 return IRQ_NONE;  /* Not our interrupt */
3740
3741         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3742          * not set, then the adapter didn't send an interrupt */
3743         if (unlikely(hw->mac_type >= e1000_82571 &&
3744                      !(icr & E1000_ICR_INT_ASSERTED)))
3745                 return IRQ_NONE;
3746
3747         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3748          * need for the IMC write */
3749
3750         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3751                 hw->get_link_status = 1;
3752                 /* 80003ES2LAN workaround--
3753                  * For packet buffer work-around on link down event;
3754                  * disable receives here in the ISR and
3755                  * reset adapter in watchdog
3756                  */
3757                 if (netif_carrier_ok(netdev) &&
3758                     (hw->mac_type == e1000_80003es2lan)) {
3759                         /* disable receives */
3760                         rctl = er32(RCTL);
3761                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3762                 }
3763                 /* guard against interrupt when we're going down */
3764                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3765                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3766         }
3767
3768         if (unlikely(hw->mac_type < e1000_82571)) {
3769                 /* disable interrupts, without the synchronize_irq bit */
3770                 ew32(IMC, ~0);
3771                 E1000_WRITE_FLUSH();
3772         }
3773         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3774                 adapter->total_tx_bytes = 0;
3775                 adapter->total_tx_packets = 0;
3776                 adapter->total_rx_bytes = 0;
3777                 adapter->total_rx_packets = 0;
3778                 __netif_rx_schedule(netdev, &adapter->napi);
3779         } else
3780                 /* this really should not happen! if it does it is basically a
3781                  * bug, but not a hard error, so enable ints and continue */
3782                 e1000_irq_enable(adapter);
3783
3784         return IRQ_HANDLED;
3785 }
3786
3787 /**
3788  * e1000_clean - NAPI Rx polling callback
3789  * @adapter: board private structure
3790  **/
3791 static int e1000_clean(struct napi_struct *napi, int budget)
3792 {
3793         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3794         struct net_device *poll_dev = adapter->netdev;
3795         int tx_cleaned = 0, work_done = 0;
3796
3797         adapter = netdev_priv(poll_dev);
3798
3799         /* e1000_clean is called per-cpu.  This lock protects
3800          * tx_ring[0] from being cleaned by multiple cpus
3801          * simultaneously.  A failure obtaining the lock means
3802          * tx_ring[0] is currently being cleaned anyway. */
3803         if (spin_trylock(&adapter->tx_queue_lock)) {
3804                 tx_cleaned = e1000_clean_tx_irq(adapter,
3805                                                 &adapter->tx_ring[0]);
3806                 spin_unlock(&adapter->tx_queue_lock);
3807         }
3808
3809         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3810                           &work_done, budget);
3811
3812         if (tx_cleaned)
3813                 work_done = budget;
3814
3815         /* If budget not fully consumed, exit the polling mode */
3816         if (work_done < budget) {
3817                 if (likely(adapter->itr_setting & 3))
3818                         e1000_set_itr(adapter);
3819                 netif_rx_complete(poll_dev, napi);
3820                 e1000_irq_enable(adapter);
3821         }
3822
3823         return work_done;
3824 }
3825
3826 /**
3827  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3828  * @adapter: board private structure
3829  **/
3830 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3831                                struct e1000_tx_ring *tx_ring)
3832 {
3833         struct e1000_hw *hw = &adapter->hw;
3834         struct net_device *netdev = adapter->netdev;
3835         struct e1000_tx_desc *tx_desc, *eop_desc;
3836         struct e1000_buffer *buffer_info;
3837         unsigned int i, eop;
3838         unsigned int count = 0;
3839         bool cleaned = false;
3840         unsigned int total_tx_bytes=0, total_tx_packets=0;
3841
3842         i = tx_ring->next_to_clean;
3843         eop = tx_ring->buffer_info[i].next_to_watch;
3844         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3845
3846         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3847                 for (cleaned = false; !cleaned; ) {
3848                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3849                         buffer_info = &tx_ring->buffer_info[i];
3850                         cleaned = (i == eop);
3851
3852                         if (cleaned) {
3853                                 struct sk_buff *skb = buffer_info->skb;
3854                                 unsigned int segs, bytecount;
3855                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3856                                 /* multiply data chunks by size of headers */
3857                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3858                                             skb->len;
3859                                 total_tx_packets += segs;
3860                                 total_tx_bytes += bytecount;
3861                         }
3862                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3863                         tx_desc->upper.data = 0;
3864
3865                         if (unlikely(++i == tx_ring->count)) i = 0;
3866                 }
3867
3868                 eop = tx_ring->buffer_info[i].next_to_watch;
3869                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3870 #define E1000_TX_WEIGHT 64
3871                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3872                 if (count++ == E1000_TX_WEIGHT)
3873                         break;
3874         }
3875
3876         tx_ring->next_to_clean = i;
3877
3878 #define TX_WAKE_THRESHOLD 32
3879         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3880                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3881                 /* Make sure that anybody stopping the queue after this
3882                  * sees the new next_to_clean.
3883                  */
3884                 smp_mb();
3885                 if (netif_queue_stopped(netdev)) {
3886                         netif_wake_queue(netdev);
3887                         ++adapter->restart_queue;
3888                 }
3889         }
3890
3891         if (adapter->detect_tx_hung) {
3892                 /* Detect a transmit hang in hardware, this serializes the
3893                  * check with the clearing of time_stamp and movement of i */
3894                 adapter->detect_tx_hung = false;
3895                 if (tx_ring->buffer_info[eop].dma &&
3896                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3897                                (adapter->tx_timeout_factor * HZ))
3898                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3899
3900                         /* detected Tx unit hang */
3901                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3902                                         "  Tx Queue             <%lu>\n"
3903                                         "  TDH                  <%x>\n"
3904                                         "  TDT                  <%x>\n"
3905                                         "  next_to_use          <%x>\n"
3906                                         "  next_to_clean        <%x>\n"
3907                                         "buffer_info[next_to_clean]\n"
3908                                         "  time_stamp           <%lx>\n"
3909                                         "  next_to_watch        <%x>\n"
3910                                         "  jiffies              <%lx>\n"
3911                                         "  next_to_watch.status <%x>\n",
3912                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3913                                         sizeof(struct e1000_tx_ring)),
3914                                 readl(hw->hw_addr + tx_ring->tdh),
3915                                 readl(hw->hw_addr + tx_ring->tdt),
3916                                 tx_ring->next_to_use,
3917                                 tx_ring->next_to_clean,
3918                                 tx_ring->buffer_info[eop].time_stamp,
3919                                 eop,
3920                                 jiffies,
3921                                 eop_desc->upper.fields.status);
3922                         netif_stop_queue(netdev);
3923                 }
3924         }
3925         adapter->total_tx_bytes += total_tx_bytes;
3926         adapter->total_tx_packets += total_tx_packets;
3927         adapter->net_stats.tx_bytes += total_tx_bytes;
3928         adapter->net_stats.tx_packets += total_tx_packets;
3929         return cleaned;
3930 }
3931
3932 /**
3933  * e1000_rx_checksum - Receive Checksum Offload for 82543
3934  * @adapter:     board private structure
3935  * @status_err:  receive descriptor status and error fields
3936  * @csum:        receive descriptor csum field
3937  * @sk_buff:     socket buffer with received data
3938  **/
3939
3940 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3941                               u32 csum, struct sk_buff *skb)
3942 {
3943         struct e1000_hw *hw = &adapter->hw;
3944         u16 status = (u16)status_err;
3945         u8 errors = (u8)(status_err >> 24);
3946         skb->ip_summed = CHECKSUM_NONE;
3947
3948         /* 82543 or newer only */
3949         if (unlikely(hw->mac_type < e1000_82543)) return;
3950         /* Ignore Checksum bit is set */
3951         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3952         /* TCP/UDP checksum error bit is set */
3953         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3954                 /* let the stack verify checksum errors */
3955                 adapter->hw_csum_err++;
3956                 return;
3957         }
3958         /* TCP/UDP Checksum has not been calculated */
3959         if (hw->mac_type <= e1000_82547_rev_2) {
3960                 if (!(status & E1000_RXD_STAT_TCPCS))
3961                         return;
3962         } else {
3963                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3964                         return;
3965         }
3966         /* It must be a TCP or UDP packet with a valid checksum */
3967         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3968                 /* TCP checksum is good */
3969                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3970         } else if (hw->mac_type > e1000_82547_rev_2) {
3971                 /* IP fragment with UDP payload */
3972                 /* Hardware complements the payload checksum, so we undo it
3973                  * and then put the value in host order for further stack use.
3974                  */
3975                 __sum16 sum = (__force __sum16)htons(csum);
3976                 skb->csum = csum_unfold(~sum);
3977                 skb->ip_summed = CHECKSUM_COMPLETE;
3978         }
3979         adapter->hw_csum_good++;
3980 }
3981
3982 /**
3983  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3984  * @adapter: board private structure
3985  **/
3986 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3987                                struct e1000_rx_ring *rx_ring,
3988                                int *work_done, int work_to_do)
3989 {
3990         struct e1000_hw *hw = &adapter->hw;
3991         struct net_device *netdev = adapter->netdev;
3992         struct pci_dev *pdev = adapter->pdev;
3993         struct e1000_rx_desc *rx_desc, *next_rxd;
3994         struct e1000_buffer *buffer_info, *next_buffer;
3995         unsigned long flags;
3996         u32 length;
3997         u8 last_byte;
3998         unsigned int i;
3999         int cleaned_count = 0;
4000         bool cleaned = false;
4001         unsigned int total_rx_bytes=0, total_rx_packets=0;
4002
4003         i = rx_ring->next_to_clean;
4004         rx_desc = E1000_RX_DESC(*rx_ring, i);
4005         buffer_info = &rx_ring->buffer_info[i];
4006
4007         while (rx_desc->status & E1000_RXD_STAT_DD) {
4008                 struct sk_buff *skb;
4009                 u8 status;
4010
4011                 if (*work_done >= work_to_do)
4012                         break;
4013                 (*work_done)++;
4014
4015                 status = rx_desc->status;
4016                 skb = buffer_info->skb;
4017                 buffer_info->skb = NULL;
4018
4019                 prefetch(skb->data - NET_IP_ALIGN);
4020
4021                 if (++i == rx_ring->count) i = 0;
4022                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4023                 prefetch(next_rxd);
4024
4025                 next_buffer = &rx_ring->buffer_info[i];
4026
4027                 cleaned = true;
4028                 cleaned_count++;
4029                 pci_unmap_single(pdev,
4030                                  buffer_info->dma,
4031                                  buffer_info->length,
4032                                  PCI_DMA_FROMDEVICE);
4033
4034                 length = le16_to_cpu(rx_desc->length);
4035
4036                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4037                         /* All receives must fit into a single buffer */
4038                         E1000_DBG("%s: Receive packet consumed multiple"
4039                                   " buffers\n", netdev->name);
4040                         /* recycle */
4041                         buffer_info->skb = skb;
4042                         goto next_desc;
4043                 }
4044
4045                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4046                         last_byte = *(skb->data + length - 1);
4047                         if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4048                                        last_byte)) {
4049                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4050                                 e1000_tbi_adjust_stats(hw, &adapter->stats,
4051                                                        length, skb->data);
4052                                 spin_unlock_irqrestore(&adapter->stats_lock,
4053                                                        flags);
4054                                 length--;
4055                         } else {
4056                                 /* recycle */
4057                                 buffer_info->skb = skb;
4058                                 goto next_desc;
4059                         }
4060                 }
4061
4062                 /* adjust length to remove Ethernet CRC, this must be
4063                  * done after the TBI_ACCEPT workaround above */
4064                 length -= 4;
4065
4066                 /* probably a little skewed due to removing CRC */
4067                 total_rx_bytes += length;
4068                 total_rx_packets++;
4069
4070                 /* code added for copybreak, this should improve
4071                  * performance for small packets with large amounts
4072                  * of reassembly being done in the stack */
4073                 if (length < copybreak) {
4074                         struct sk_buff *new_skb =
4075                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4076                         if (new_skb) {
4077                                 skb_reserve(new_skb, NET_IP_ALIGN);
4078                                 skb_copy_to_linear_data_offset(new_skb,
4079                                                                -NET_IP_ALIGN,
4080                                                                (skb->data -
4081                                                                 NET_IP_ALIGN),
4082                                                                (length +
4083                                                                 NET_IP_ALIGN));
4084                                 /* save the skb in buffer_info as good */
4085                                 buffer_info->skb = skb;
4086                                 skb = new_skb;
4087                         }
4088                         /* else just continue with the old one */
4089                 }
4090                 /* end copybreak code */
4091                 skb_put(skb, length);
4092
4093                 /* Receive Checksum Offload */
4094                 e1000_rx_checksum(adapter,
4095                                   (u32)(status) |
4096                                   ((u32)(rx_desc->errors) << 24),
4097                                   le16_to_cpu(rx_desc->csum), skb);
4098
4099                 skb->protocol = eth_type_trans(skb, netdev);
4100
4101                 if (unlikely(adapter->vlgrp &&
4102                             (status & E1000_RXD_STAT_VP))) {
4103                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4104                                                  le16_to_cpu(rx_desc->special));
4105                 } else {
4106                         netif_receive_skb(skb);
4107                 }
4108
4109 next_desc:
4110                 rx_desc->status = 0;
4111
4112                 /* return some buffers to hardware, one at a time is too slow */
4113                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4114                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4115                         cleaned_count = 0;
4116                 }
4117
4118                 /* use prefetched values */
4119                 rx_desc = next_rxd;
4120                 buffer_info = next_buffer;
4121         }
4122         rx_ring->next_to_clean = i;
4123
4124         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4125         if (cleaned_count)
4126                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4127
4128         adapter->total_rx_packets += total_rx_packets;
4129         adapter->total_rx_bytes += total_rx_bytes;
4130         adapter->net_stats.rx_bytes += total_rx_bytes;
4131         adapter->net_stats.rx_packets += total_rx_packets;
4132         return cleaned;
4133 }
4134
4135 /**
4136  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4137  * @adapter: address of board private structure
4138  **/
4139
4140 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4141                                    struct e1000_rx_ring *rx_ring,
4142                                    int cleaned_count)
4143 {
4144         struct e1000_hw *hw = &adapter->hw;
4145         struct net_device *netdev = adapter->netdev;
4146         struct pci_dev *pdev = adapter->pdev;
4147         struct e1000_rx_desc *rx_desc;
4148         struct e1000_buffer *buffer_info;
4149         struct sk_buff *skb;
4150         unsigned int i;
4151         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4152
4153         i = rx_ring->next_to_use;
4154         buffer_info = &rx_ring->buffer_info[i];
4155
4156         while (cleaned_count--) {
4157                 skb = buffer_info->skb;
4158                 if (skb) {
4159                         skb_trim(skb, 0);
4160                         goto map_skb;
4161                 }
4162
4163                 skb = netdev_alloc_skb(netdev, bufsz);
4164                 if (unlikely(!skb)) {
4165                         /* Better luck next round */
4166                         adapter->alloc_rx_buff_failed++;
4167                         break;
4168                 }
4169
4170                 /* Fix for errata 23, can't cross 64kB boundary */
4171                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4172                         struct sk_buff *oldskb = skb;
4173                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4174                                              "at %p\n", bufsz, skb->data);
4175                         /* Try again, without freeing the previous */
4176                         skb = netdev_alloc_skb(netdev, bufsz);
4177                         /* Failed allocation, critical failure */
4178                         if (!skb) {
4179                                 dev_kfree_skb(oldskb);
4180                                 break;
4181                         }
4182
4183                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4184                                 /* give up */
4185                                 dev_kfree_skb(skb);
4186                                 dev_kfree_skb(oldskb);
4187                                 break; /* while !buffer_info->skb */
4188                         }
4189
4190                         /* Use new allocation */
4191                         dev_kfree_skb(oldskb);
4192                 }
4193                 /* Make buffer alignment 2 beyond a 16 byte boundary
4194                  * this will result in a 16 byte aligned IP header after
4195                  * the 14 byte MAC header is removed
4196                  */
4197                 skb_reserve(skb, NET_IP_ALIGN);
4198
4199                 buffer_info->skb = skb;
4200                 buffer_info->length = adapter->rx_buffer_len;
4201 map_skb:
4202                 buffer_info->dma = pci_map_single(pdev,
4203                                                   skb->data,
4204                                                   adapter->rx_buffer_len,
4205                                                   PCI_DMA_FROMDEVICE);
4206
4207                 /* Fix for errata 23, can't cross 64kB boundary */
4208                 if (!e1000_check_64k_bound(adapter,
4209                                         (void *)(unsigned long)buffer_info->dma,
4210                                         adapter->rx_buffer_len)) {
4211                         DPRINTK(RX_ERR, ERR,
4212                                 "dma align check failed: %u bytes at %p\n",
4213                                 adapter->rx_buffer_len,
4214                                 (void *)(unsigned long)buffer_info->dma);
4215                         dev_kfree_skb(skb);
4216                         buffer_info->skb = NULL;
4217
4218                         pci_unmap_single(pdev, buffer_info->dma,
4219                                          adapter->rx_buffer_len,
4220                                          PCI_DMA_FROMDEVICE);
4221
4222                         break; /* while !buffer_info->skb */
4223                 }
4224                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4225                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4226
4227                 if (unlikely(++i == rx_ring->count))
4228                         i = 0;
4229                 buffer_info = &rx_ring->buffer_info[i];
4230         }
4231
4232         if (likely(rx_ring->next_to_use != i)) {
4233                 rx_ring->next_to_use = i;
4234                 if (unlikely(i-- == 0))
4235                         i = (rx_ring->count - 1);
4236
4237                 /* Force memory writes to complete before letting h/w
4238                  * know there are new descriptors to fetch.  (Only
4239                  * applicable for weak-ordered memory model archs,
4240                  * such as IA-64). */
4241                 wmb();
4242                 writel(i, hw->hw_addr + rx_ring->rdt);
4243         }
4244 }
4245
4246 /**
4247  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4248  * @adapter:
4249  **/
4250
4251 static void e1000_smartspeed(struct e1000_adapter *adapter)
4252 {
4253         struct e1000_hw *hw = &adapter->hw;
4254         u16 phy_status;
4255         u16 phy_ctrl;
4256
4257         if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4258            !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4259                 return;
4260
4261         if (adapter->smartspeed == 0) {
4262                 /* If Master/Slave config fault is asserted twice,
4263                  * we assume back-to-back */
4264                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4265                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4266                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4267                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4268                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4269                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4270                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4271                         e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4272                                             phy_ctrl);
4273                         adapter->smartspeed++;
4274                         if (!e1000_phy_setup_autoneg(hw) &&
4275                            !e1000_read_phy_reg(hw, PHY_CTRL,
4276                                                &phy_ctrl)) {
4277                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4278                                              MII_CR_RESTART_AUTO_NEG);
4279                                 e1000_write_phy_reg(hw, PHY_CTRL,
4280                                                     phy_ctrl);
4281                         }
4282                 }
4283                 return;
4284         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4285                 /* If still no link, perhaps using 2/3 pair cable */
4286                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4287                 phy_ctrl |= CR_1000T_MS_ENABLE;
4288                 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4289                 if (!e1000_phy_setup_autoneg(hw) &&
4290                    !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4291                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4292                                      MII_CR_RESTART_AUTO_NEG);
4293                         e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4294                 }
4295         }
4296         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4297         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4298                 adapter->smartspeed = 0;
4299 }
4300
4301 /**
4302  * e1000_ioctl -
4303  * @netdev:
4304  * @ifreq:
4305  * @cmd:
4306  **/
4307
4308 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4309 {
4310         switch (cmd) {
4311         case SIOCGMIIPHY:
4312         case SIOCGMIIREG:
4313         case SIOCSMIIREG:
4314                 return e1000_mii_ioctl(netdev, ifr, cmd);
4315         default:
4316                 return -EOPNOTSUPP;
4317         }
4318 }
4319
4320 /**
4321  * e1000_mii_ioctl -
4322  * @netdev:
4323  * @ifreq:
4324  * @cmd:
4325  **/
4326
4327 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4328                            int cmd)
4329 {
4330         struct e1000_adapter *adapter = netdev_priv(netdev);
4331         struct e1000_hw *hw = &adapter->hw;
4332         struct mii_ioctl_data *data = if_mii(ifr);
4333         int retval;
4334         u16 mii_reg;
4335         u16 spddplx;
4336         unsigned long flags;
4337
4338         if (hw->media_type != e1000_media_type_copper)
4339                 return -EOPNOTSUPP;
4340
4341         switch (cmd) {
4342         case SIOCGMIIPHY:
4343                 data->phy_id = hw->phy_addr;
4344                 break;
4345         case SIOCGMIIREG:
4346                 if (!capable(CAP_NET_ADMIN))
4347                         return -EPERM;
4348                 spin_lock_irqsave(&adapter->stats_lock, flags);
4349                 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4350                                    &data->val_out)) {
4351                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4352                         return -EIO;
4353                 }
4354                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4355                 break;
4356         case SIOCSMIIREG:
4357                 if (!capable(CAP_NET_ADMIN))
4358                         return -EPERM;
4359                 if (data->reg_num & ~(0x1F))
4360                         return -EFAULT;
4361                 mii_reg = data->val_in;
4362                 spin_lock_irqsave(&adapter->stats_lock, flags);
4363                 if (e1000_write_phy_reg(hw, data->reg_num,
4364                                         mii_reg)) {
4365                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4366                         return -EIO;
4367                 }
4368                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4369                 if (hw->media_type == e1000_media_type_copper) {
4370                         switch (data->reg_num) {
4371                         case PHY_CTRL:
4372                                 if (mii_reg & MII_CR_POWER_DOWN)
4373                                         break;
4374                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4375                                         hw->autoneg = 1;
4376                                         hw->autoneg_advertised = 0x2F;
4377                                 } else {
4378                                         if (mii_reg & 0x40)
4379                                                 spddplx = SPEED_1000;
4380                                         else if (mii_reg & 0x2000)
4381                                                 spddplx = SPEED_100;
4382                                         else
4383                                                 spddplx = SPEED_10;
4384                                         spddplx += (mii_reg & 0x100)
4385                                                    ? DUPLEX_FULL :
4386                                                    DUPLEX_HALF;
4387                                         retval = e1000_set_spd_dplx(adapter,
4388                                                                     spddplx);
4389                                         if (retval)
4390                                                 return retval;
4391                                 }
4392                                 if (netif_running(adapter->netdev))
4393                                         e1000_reinit_locked(adapter);
4394                                 else
4395                                         e1000_reset(adapter);
4396                                 break;
4397                         case M88E1000_PHY_SPEC_CTRL:
4398                         case M88E1000_EXT_PHY_SPEC_CTRL:
4399                                 if (e1000_phy_reset(hw))
4400                                         return -EIO;
4401                                 break;
4402                         }
4403                 } else {
4404                         switch (data->reg_num) {
4405                         case PHY_CTRL:
4406                                 if (mii_reg & MII_CR_POWER_DOWN)
4407                                         break;
4408                                 if (netif_running(adapter->netdev))
4409                                         e1000_reinit_locked(adapter);
4410                                 else
4411                                         e1000_reset(adapter);
4412                                 break;
4413                         }
4414                 }
4415                 break;
4416         default:
4417                 return -EOPNOTSUPP;
4418         }
4419         return E1000_SUCCESS;
4420 }
4421
4422 void e1000_pci_set_mwi(struct e1000_hw *hw)
4423 {
4424         struct e1000_adapter *adapter = hw->back;
4425         int ret_val = pci_set_mwi(adapter->pdev);
4426
4427         if (ret_val)
4428                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4429 }
4430
4431 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4432 {
4433         struct e1000_adapter *adapter = hw->back;
4434
4435         pci_clear_mwi(adapter->pdev);
4436 }
4437
4438 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4439 {
4440         struct e1000_adapter *adapter = hw->back;
4441         return pcix_get_mmrbc(adapter->pdev);
4442 }
4443
4444 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4445 {
4446         struct e1000_adapter *adapter = hw->back;
4447         pcix_set_mmrbc(adapter->pdev, mmrbc);
4448 }
4449
4450 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4451 {
4452     struct e1000_adapter *adapter = hw->back;
4453     u16 cap_offset;
4454
4455     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4456     if (!cap_offset)
4457         return -E1000_ERR_CONFIG;
4458
4459     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4460
4461     return E1000_SUCCESS;
4462 }
4463
4464 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4465 {
4466         outl(value, port);
4467 }
4468
4469 static void e1000_vlan_rx_register(struct net_device *netdev,
4470                                    struct vlan_group *grp)
4471 {
4472         struct e1000_adapter *adapter = netdev_priv(netdev);
4473         struct e1000_hw *hw = &adapter->hw;
4474         u32 ctrl, rctl;
4475
4476         if (!test_bit(__E1000_DOWN, &adapter->flags))
4477                 e1000_irq_disable(adapter);
4478         adapter->vlgrp = grp;
4479
4480         if (grp) {
4481                 /* enable VLAN tag insert/strip */
4482                 ctrl = er32(CTRL);
4483                 ctrl |= E1000_CTRL_VME;
4484                 ew32(CTRL, ctrl);
4485
4486                 if (adapter->hw.mac_type != e1000_ich8lan) {
4487                         /* enable VLAN receive filtering */
4488                         rctl = er32(RCTL);
4489                         rctl &= ~E1000_RCTL_CFIEN;
4490                         ew32(RCTL, rctl);
4491                         e1000_update_mng_vlan(adapter);
4492                 }
4493         } else {
4494                 /* disable VLAN tag insert/strip */
4495                 ctrl = er32(CTRL);
4496                 ctrl &= ~E1000_CTRL_VME;
4497                 ew32(CTRL, ctrl);
4498
4499                 if (adapter->hw.mac_type != e1000_ich8lan) {
4500                         if (adapter->mng_vlan_id !=
4501                             (u16)E1000_MNG_VLAN_NONE) {
4502                                 e1000_vlan_rx_kill_vid(netdev,
4503                                                        adapter->mng_vlan_id);
4504                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4505                         }
4506                 }
4507         }
4508
4509         if (!test_bit(__E1000_DOWN, &adapter->flags))
4510                 e1000_irq_enable(adapter);
4511 }
4512
4513 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4514 {
4515         struct e1000_adapter *adapter = netdev_priv(netdev);
4516         struct e1000_hw *hw = &adapter->hw;
4517         u32 vfta, index;
4518
4519         if ((hw->mng_cookie.status &
4520              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4521             (vid == adapter->mng_vlan_id))
4522                 return;
4523         /* add VID to filter table */
4524         index = (vid >> 5) & 0x7F;
4525         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4526         vfta |= (1 << (vid & 0x1F));
4527         e1000_write_vfta(hw, index, vfta);
4528 }
4529
4530 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4531 {
4532         struct e1000_adapter *adapter = netdev_priv(netdev);
4533         struct e1000_hw *hw = &adapter->hw;
4534         u32 vfta, index;
4535
4536         if (!test_bit(__E1000_DOWN, &adapter->flags))
4537                 e1000_irq_disable(adapter);
4538         vlan_group_set_device(adapter->vlgrp, vid, NULL);
4539         if (!test_bit(__E1000_DOWN, &adapter->flags))
4540                 e1000_irq_enable(adapter);
4541
4542         if ((hw->mng_cookie.status &
4543              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4544             (vid == adapter->mng_vlan_id)) {
4545                 /* release control to f/w */
4546                 e1000_release_hw_control(adapter);
4547                 return;
4548         }
4549
4550         /* remove VID from filter table */
4551         index = (vid >> 5) & 0x7F;
4552         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4553         vfta &= ~(1 << (vid & 0x1F));
4554         e1000_write_vfta(hw, index, vfta);
4555 }
4556
4557 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4558 {
4559         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4560
4561         if (adapter->vlgrp) {
4562                 u16 vid;
4563                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4564                         if (!vlan_group_get_device(adapter->vlgrp, vid))
4565                                 continue;
4566                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4567                 }
4568         }
4569 }
4570
4571 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4572 {
4573         struct e1000_hw *hw = &adapter->hw;
4574
4575         hw->autoneg = 0;
4576
4577         /* Fiber NICs only allow 1000 gbps Full duplex */
4578         if ((hw->media_type == e1000_media_type_fiber) &&
4579                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4580                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4581                 return -EINVAL;
4582         }
4583
4584         switch (spddplx) {
4585         case SPEED_10 + DUPLEX_HALF:
4586                 hw->forced_speed_duplex = e1000_10_half;
4587                 break;
4588         case SPEED_10 + DUPLEX_FULL:
4589                 hw->forced_speed_duplex = e1000_10_full;
4590                 break;
4591         case SPEED_100 + DUPLEX_HALF:
4592                 hw->forced_speed_duplex = e1000_100_half;
4593                 break;
4594         case SPEED_100 + DUPLEX_FULL:
4595                 hw->forced_speed_duplex = e1000_100_full;
4596                 break;
4597         case SPEED_1000 + DUPLEX_FULL:
4598                 hw->autoneg = 1;
4599                 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4600                 break;
4601         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4602         default:
4603                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4604                 return -EINVAL;
4605         }
4606         return 0;
4607 }
4608
4609 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4610 {
4611         struct net_device *netdev = pci_get_drvdata(pdev);
4612         struct e1000_adapter *adapter = netdev_priv(netdev);
4613         struct e1000_hw *hw = &adapter->hw;
4614         u32 ctrl, ctrl_ext, rctl, status;
4615         u32 wufc = adapter->wol;
4616 #ifdef CONFIG_PM
4617         int retval = 0;
4618 #endif
4619
4620         netif_device_detach(netdev);
4621
4622         if (netif_running(netdev)) {
4623                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4624                 e1000_down(adapter);
4625         }
4626
4627 #ifdef CONFIG_PM
4628         retval = pci_save_state(pdev);
4629         if (retval)
4630                 return retval;
4631 #endif
4632
4633         status = er32(STATUS);
4634         if (status & E1000_STATUS_LU)
4635                 wufc &= ~E1000_WUFC_LNKC;
4636
4637         if (wufc) {
4638                 e1000_setup_rctl(adapter);
4639                 e1000_set_rx_mode(netdev);
4640
4641                 /* turn on all-multi mode if wake on multicast is enabled */
4642                 if (wufc & E1000_WUFC_MC) {
4643                         rctl = er32(RCTL);
4644                         rctl |= E1000_RCTL_MPE;
4645                         ew32(RCTL, rctl);
4646                 }
4647
4648                 if (hw->mac_type >= e1000_82540) {
4649                         ctrl = er32(CTRL);
4650                         /* advertise wake from D3Cold */
4651                         #define E1000_CTRL_ADVD3WUC 0x00100000
4652                         /* phy power management enable */
4653                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4654                         ctrl |= E1000_CTRL_ADVD3WUC |
4655                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4656                         ew32(CTRL, ctrl);
4657                 }
4658
4659                 if (hw->media_type == e1000_media_type_fiber ||
4660                    hw->media_type == e1000_media_type_internal_serdes) {
4661                         /* keep the laser running in D3 */
4662                         ctrl_ext = er32(CTRL_EXT);
4663                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4664                         ew32(CTRL_EXT, ctrl_ext);
4665                 }
4666
4667                 /* Allow time for pending master requests to run */
4668                 e1000_disable_pciex_master(hw);
4669
4670                 ew32(WUC, E1000_WUC_PME_EN);
4671                 ew32(WUFC, wufc);
4672                 pci_enable_wake(pdev, PCI_D3hot, 1);
4673                 pci_enable_wake(pdev, PCI_D3cold, 1);
4674         } else {
4675                 ew32(WUC, 0);
4676                 ew32(WUFC, 0);
4677                 pci_enable_wake(pdev, PCI_D3hot, 0);
4678                 pci_enable_wake(pdev, PCI_D3cold, 0);
4679         }
4680
4681         e1000_release_manageability(adapter);
4682
4683         /* make sure adapter isn't asleep if manageability is enabled */
4684         if (adapter->en_mng_pt) {
4685                 pci_enable_wake(pdev, PCI_D3hot, 1);
4686                 pci_enable_wake(pdev, PCI_D3cold, 1);
4687         }
4688
4689         if (hw->phy_type == e1000_phy_igp_3)
4690                 e1000_phy_powerdown_workaround(hw);
4691
4692         if (netif_running(netdev))
4693                 e1000_free_irq(adapter);
4694
4695         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4696          * would have already happened in close and is redundant. */
4697         e1000_release_hw_control(adapter);
4698
4699         pci_disable_device(pdev);
4700
4701         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4702
4703         return 0;
4704 }
4705
4706 #ifdef CONFIG_PM
4707 static int e1000_resume(struct pci_dev *pdev)
4708 {
4709         struct net_device *netdev = pci_get_drvdata(pdev);
4710         struct e1000_adapter *adapter = netdev_priv(netdev);
4711         struct e1000_hw *hw = &adapter->hw;
4712         u32 err;
4713
4714         pci_set_power_state(pdev, PCI_D0);
4715         pci_restore_state(pdev);
4716
4717         if (adapter->need_ioport)
4718                 err = pci_enable_device(pdev);
4719         else
4720                 err = pci_enable_device_mem(pdev);
4721         if (err) {
4722                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4723                 return err;
4724         }
4725         pci_set_master(pdev);
4726
4727         pci_enable_wake(pdev, PCI_D3hot, 0);
4728         pci_enable_wake(pdev, PCI_D3cold, 0);
4729
4730         if (netif_running(netdev)) {
4731                 err = e1000_request_irq(adapter);
4732                 if (err)
4733                         return err;
4734         }
4735
4736         e1000_power_up_phy(adapter);
4737         e1000_reset(adapter);
4738         ew32(WUS, ~0);
4739
4740         e1000_init_manageability(adapter);
4741
4742         if (netif_running(netdev))
4743                 e1000_up(adapter);
4744
4745         netif_device_attach(netdev);
4746
4747         /* If the controller is 82573 and f/w is AMT, do not set
4748          * DRV_LOAD until the interface is up.  For all other cases,
4749          * let the f/w know that the h/w is now under the control
4750          * of the driver. */
4751         if (hw->mac_type != e1000_82573 ||
4752             !e1000_check_mng_mode(hw))
4753                 e1000_get_hw_control(adapter);
4754
4755         return 0;
4756 }
4757 #endif
4758
4759 static void e1000_shutdown(struct pci_dev *pdev)
4760 {
4761         e1000_suspend(pdev, PMSG_SUSPEND);
4762 }
4763
4764 #ifdef CONFIG_NET_POLL_CONTROLLER
4765 /*
4766  * Polling 'interrupt' - used by things like netconsole to send skbs
4767  * without having to re-enable interrupts. It's not called while
4768  * the interrupt routine is executing.
4769  */
4770 static void e1000_netpoll(struct net_device *netdev)
4771 {
4772         struct e1000_adapter *adapter = netdev_priv(netdev);
4773
4774         disable_irq(adapter->pdev->irq);
4775         e1000_intr(adapter->pdev->irq, netdev);
4776         enable_irq(adapter->pdev->irq);
4777 }
4778 #endif
4779
4780 /**
4781  * e1000_io_error_detected - called when PCI error is detected
4782  * @pdev: Pointer to PCI device
4783  * @state: The current pci conneection state
4784  *
4785  * This function is called after a PCI bus error affecting
4786  * this device has been detected.
4787  */
4788 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4789                                                 pci_channel_state_t state)
4790 {
4791         struct net_device *netdev = pci_get_drvdata(pdev);
4792         struct e1000_adapter *adapter = netdev_priv(netdev);
4793
4794         netif_device_detach(netdev);
4795
4796         if (netif_running(netdev))
4797                 e1000_down(adapter);
4798         pci_disable_device(pdev);
4799
4800         /* Request a slot slot reset. */
4801         return PCI_ERS_RESULT_NEED_RESET;
4802 }
4803
4804 /**
4805  * e1000_io_slot_reset - called after the pci bus has been reset.
4806  * @pdev: Pointer to PCI device
4807  *
4808  * Restart the card from scratch, as if from a cold-boot. Implementation
4809  * resembles the first-half of the e1000_resume routine.
4810  */
4811 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4812 {
4813         struct net_device *netdev = pci_get_drvdata(pdev);
4814         struct e1000_adapter *adapter = netdev_priv(netdev);
4815         struct e1000_hw *hw = &adapter->hw;
4816         int err;
4817
4818         if (adapter->need_ioport)
4819                 err = pci_enable_device(pdev);
4820         else
4821                 err = pci_enable_device_mem(pdev);
4822         if (err) {
4823                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4824                 return PCI_ERS_RESULT_DISCONNECT;
4825         }
4826         pci_set_master(pdev);
4827
4828         pci_enable_wake(pdev, PCI_D3hot, 0);
4829         pci_enable_wake(pdev, PCI_D3cold, 0);
4830
4831         e1000_reset(adapter);
4832         ew32(WUS, ~0);
4833
4834         return PCI_ERS_RESULT_RECOVERED;
4835 }
4836
4837 /**
4838  * e1000_io_resume - called when traffic can start flowing again.
4839  * @pdev: Pointer to PCI device
4840  *
4841  * This callback is called when the error recovery driver tells us that
4842  * its OK to resume normal operation. Implementation resembles the
4843  * second-half of the e1000_resume routine.
4844  */
4845 static void e1000_io_resume(struct pci_dev *pdev)
4846 {
4847         struct net_device *netdev = pci_get_drvdata(pdev);
4848         struct e1000_adapter *adapter = netdev_priv(netdev);
4849         struct e1000_hw *hw = &adapter->hw;
4850
4851         e1000_init_manageability(adapter);
4852
4853         if (netif_running(netdev)) {
4854                 if (e1000_up(adapter)) {
4855                         printk("e1000: can't bring device back up after reset\n");
4856                         return;
4857                 }
4858         }
4859
4860         netif_device_attach(netdev);
4861
4862         /* If the controller is 82573 and f/w is AMT, do not set
4863          * DRV_LOAD until the interface is up.  For all other cases,
4864          * let the f/w know that the h/w is now under the control
4865          * of the driver. */
4866         if (hw->mac_type != e1000_82573 ||
4867             !e1000_check_mng_mode(hw))
4868                 e1000_get_hw_control(adapter);
4869
4870 }
4871
4872 /* e1000_main.c */