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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30 #include <net/ip6_checksum.h>
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #define DRV_VERSION "7.3.21-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_mem(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->vlan_features |= NETIF_F_TSO;
1052         netdev->vlan_features |= NETIF_F_TSO6;
1053         netdev->vlan_features |= NETIF_F_HW_CSUM;
1054         netdev->vlan_features |= NETIF_F_SG;
1055
1056         adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1057
1058         /* initialize eeprom parameters */
1059         if (e1000_init_eeprom_params(hw)) {
1060                 E1000_ERR("EEPROM initialization failed\n");
1061                 goto err_eeprom;
1062         }
1063
1064         /* before reading the EEPROM, reset the controller to
1065          * put the device in a known good starting state */
1066
1067         e1000_reset_hw(hw);
1068
1069         /* make sure the EEPROM is good */
1070         if (e1000_validate_eeprom_checksum(hw) < 0) {
1071                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1072                 e1000_dump_eeprom(adapter);
1073                 /*
1074                  * set MAC address to all zeroes to invalidate and temporary
1075                  * disable this device for the user. This blocks regular
1076                  * traffic while still permitting ethtool ioctls from reaching
1077                  * the hardware as well as allowing the user to run the
1078                  * interface after manually setting a hw addr using
1079                  * `ip set address`
1080                  */
1081                 memset(hw->mac_addr, 0, netdev->addr_len);
1082         } else {
1083                 /* copy the MAC address out of the EEPROM */
1084                 if (e1000_read_mac_addr(hw))
1085                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1086         }
1087         /* don't block initalization here due to bad MAC address */
1088         memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1089         memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1090
1091         if (!is_valid_ether_addr(netdev->perm_addr))
1092                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1093
1094         e1000_get_bus_info(hw);
1095
1096         init_timer(&adapter->tx_fifo_stall_timer);
1097         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1098         adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1099
1100         init_timer(&adapter->watchdog_timer);
1101         adapter->watchdog_timer.function = &e1000_watchdog;
1102         adapter->watchdog_timer.data = (unsigned long) adapter;
1103
1104         init_timer(&adapter->phy_info_timer);
1105         adapter->phy_info_timer.function = &e1000_update_phy_info;
1106         adapter->phy_info_timer.data = (unsigned long)adapter;
1107
1108         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1109
1110         e1000_check_options(adapter);
1111
1112         /* Initial Wake on LAN setting
1113          * If APM wake is enabled in the EEPROM,
1114          * enable the ACPI Magic Packet filter
1115          */
1116
1117         switch (hw->mac_type) {
1118         case e1000_82542_rev2_0:
1119         case e1000_82542_rev2_1:
1120         case e1000_82543:
1121                 break;
1122         case e1000_82544:
1123                 e1000_read_eeprom(hw,
1124                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1125                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1126                 break;
1127         case e1000_ich8lan:
1128                 e1000_read_eeprom(hw,
1129                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1130                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1131                 break;
1132         case e1000_82546:
1133         case e1000_82546_rev_3:
1134         case e1000_82571:
1135         case e1000_80003es2lan:
1136                 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1137                         e1000_read_eeprom(hw,
1138                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1139                         break;
1140                 }
1141                 /* Fall Through */
1142         default:
1143                 e1000_read_eeprom(hw,
1144                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1145                 break;
1146         }
1147         if (eeprom_data & eeprom_apme_mask)
1148                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1149
1150         /* now that we have the eeprom settings, apply the special cases
1151          * where the eeprom may be wrong or the board simply won't support
1152          * wake on lan on a particular port */
1153         switch (pdev->device) {
1154         case E1000_DEV_ID_82546GB_PCIE:
1155                 adapter->eeprom_wol = 0;
1156                 break;
1157         case E1000_DEV_ID_82546EB_FIBER:
1158         case E1000_DEV_ID_82546GB_FIBER:
1159         case E1000_DEV_ID_82571EB_FIBER:
1160                 /* Wake events only supported on port A for dual fiber
1161                  * regardless of eeprom setting */
1162                 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1163                         adapter->eeprom_wol = 0;
1164                 break;
1165         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1166         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1167         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1168         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1169         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1170                 /* if quad port adapter, disable WoL on all but port A */
1171                 if (global_quad_port_a != 0)
1172                         adapter->eeprom_wol = 0;
1173                 else
1174                         adapter->quad_port_a = 1;
1175                 /* Reset for multiple quad port adapters */
1176                 if (++global_quad_port_a == 4)
1177                         global_quad_port_a = 0;
1178                 break;
1179         }
1180
1181         /* initialize the wol settings based on the eeprom settings */
1182         adapter->wol = adapter->eeprom_wol;
1183         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1184
1185         /* print bus type/speed/width info */
1186         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1187                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1188                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1189                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1190                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1191                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1192                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1193                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1194                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1195                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1196                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1197                  "32-bit"));
1198
1199         printk("%pM\n", netdev->dev_addr);
1200
1201         if (hw->bus_type == e1000_bus_type_pci_express) {
1202                 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1203                         "longer be supported by this driver in the future.\n",
1204                         pdev->vendor, pdev->device);
1205                 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1206                         "driver instead.\n");
1207         }
1208
1209         /* reset the hardware with the new settings */
1210         e1000_reset(adapter);
1211
1212         /* If the controller is 82573 and f/w is AMT, do not set
1213          * DRV_LOAD until the interface is up.  For all other cases,
1214          * let the f/w know that the h/w is now under the control
1215          * of the driver. */
1216         if (hw->mac_type != e1000_82573 ||
1217             !e1000_check_mng_mode(hw))
1218                 e1000_get_hw_control(adapter);
1219
1220         /* tell the stack to leave us alone until e1000_open() is called */
1221         netif_carrier_off(netdev);
1222         netif_stop_queue(netdev);
1223
1224         strcpy(netdev->name, "eth%d");
1225         err = register_netdev(netdev);
1226         if (err)
1227                 goto err_register;
1228
1229         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1230
1231         cards_found++;
1232         return 0;
1233
1234 err_register:
1235         e1000_release_hw_control(adapter);
1236 err_eeprom:
1237         if (!e1000_check_phy_reset_block(hw))
1238                 e1000_phy_hw_reset(hw);
1239
1240         if (hw->flash_address)
1241                 iounmap(hw->flash_address);
1242 err_flashmap:
1243         kfree(adapter->tx_ring);
1244         kfree(adapter->rx_ring);
1245 err_sw_init:
1246         iounmap(hw->hw_addr);
1247 err_ioremap:
1248         free_netdev(netdev);
1249 err_alloc_etherdev:
1250         pci_release_selected_regions(pdev, bars);
1251 err_pci_reg:
1252 err_dma:
1253         pci_disable_device(pdev);
1254         return err;
1255 }
1256
1257 /**
1258  * e1000_remove - Device Removal Routine
1259  * @pdev: PCI device information struct
1260  *
1261  * e1000_remove is called by the PCI subsystem to alert the driver
1262  * that it should release a PCI device.  The could be caused by a
1263  * Hot-Plug event, or because the driver is going to be removed from
1264  * memory.
1265  **/
1266
1267 static void __devexit e1000_remove(struct pci_dev *pdev)
1268 {
1269         struct net_device *netdev = pci_get_drvdata(pdev);
1270         struct e1000_adapter *adapter = netdev_priv(netdev);
1271         struct e1000_hw *hw = &adapter->hw;
1272
1273         cancel_work_sync(&adapter->reset_task);
1274
1275         e1000_release_manageability(adapter);
1276
1277         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1278          * would have already happened in close and is redundant. */
1279         e1000_release_hw_control(adapter);
1280
1281         unregister_netdev(netdev);
1282
1283         if (!e1000_check_phy_reset_block(hw))
1284                 e1000_phy_hw_reset(hw);
1285
1286         kfree(adapter->tx_ring);
1287         kfree(adapter->rx_ring);
1288
1289         iounmap(hw->hw_addr);
1290         if (hw->flash_address)
1291                 iounmap(hw->flash_address);
1292         pci_release_selected_regions(pdev, adapter->bars);
1293
1294         free_netdev(netdev);
1295
1296         pci_disable_device(pdev);
1297 }
1298
1299 /**
1300  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1301  * @adapter: board private structure to initialize
1302  *
1303  * e1000_sw_init initializes the Adapter private data structure.
1304  * Fields are initialized based on PCI device information and
1305  * OS network device settings (MTU size).
1306  **/
1307
1308 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1309 {
1310         struct e1000_hw *hw = &adapter->hw;
1311         struct net_device *netdev = adapter->netdev;
1312         struct pci_dev *pdev = adapter->pdev;
1313
1314         /* PCI config space info */
1315
1316         hw->vendor_id = pdev->vendor;
1317         hw->device_id = pdev->device;
1318         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1319         hw->subsystem_id = pdev->subsystem_device;
1320         hw->revision_id = pdev->revision;
1321
1322         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1323
1324         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1325         hw->max_frame_size = netdev->mtu +
1326                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1327         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1328
1329         /* identify the MAC */
1330
1331         if (e1000_set_mac_type(hw)) {
1332                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1333                 return -EIO;
1334         }
1335
1336         switch (hw->mac_type) {
1337         default:
1338                 break;
1339         case e1000_82541:
1340         case e1000_82547:
1341         case e1000_82541_rev_2:
1342         case e1000_82547_rev_2:
1343                 hw->phy_init_script = 1;
1344                 break;
1345         }
1346
1347         e1000_set_media_type(hw);
1348
1349         hw->wait_autoneg_complete = false;
1350         hw->tbi_compatibility_en = true;
1351         hw->adaptive_ifs = true;
1352
1353         /* Copper options */
1354
1355         if (hw->media_type == e1000_media_type_copper) {
1356                 hw->mdix = AUTO_ALL_MODES;
1357                 hw->disable_polarity_correction = false;
1358                 hw->master_slave = E1000_MASTER_SLAVE;
1359         }
1360
1361         adapter->num_tx_queues = 1;
1362         adapter->num_rx_queues = 1;
1363
1364         if (e1000_alloc_queues(adapter)) {
1365                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1366                 return -ENOMEM;
1367         }
1368
1369         /* Explicitly disable IRQ since the NIC can be in any state. */
1370         e1000_irq_disable(adapter);
1371
1372         spin_lock_init(&adapter->stats_lock);
1373
1374         set_bit(__E1000_DOWN, &adapter->flags);
1375
1376         return 0;
1377 }
1378
1379 /**
1380  * e1000_alloc_queues - Allocate memory for all rings
1381  * @adapter: board private structure to initialize
1382  *
1383  * We allocate one ring per queue at run-time since we don't know the
1384  * number of queues at compile-time.
1385  **/
1386
1387 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1388 {
1389         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1390                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1391         if (!adapter->tx_ring)
1392                 return -ENOMEM;
1393
1394         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1395                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1396         if (!adapter->rx_ring) {
1397                 kfree(adapter->tx_ring);
1398                 return -ENOMEM;
1399         }
1400
1401         return E1000_SUCCESS;
1402 }
1403
1404 /**
1405  * e1000_open - Called when a network interface is made active
1406  * @netdev: network interface device structure
1407  *
1408  * Returns 0 on success, negative value on failure
1409  *
1410  * The open entry point is called when a network interface is made
1411  * active by the system (IFF_UP).  At this point all resources needed
1412  * for transmit and receive operations are allocated, the interrupt
1413  * handler is registered with the OS, the watchdog timer is started,
1414  * and the stack is notified that the interface is ready.
1415  **/
1416
1417 static int e1000_open(struct net_device *netdev)
1418 {
1419         struct e1000_adapter *adapter = netdev_priv(netdev);
1420         struct e1000_hw *hw = &adapter->hw;
1421         int err;
1422
1423         /* disallow open during test */
1424         if (test_bit(__E1000_TESTING, &adapter->flags))
1425                 return -EBUSY;
1426
1427         /* allocate transmit descriptors */
1428         err = e1000_setup_all_tx_resources(adapter);
1429         if (err)
1430                 goto err_setup_tx;
1431
1432         /* allocate receive descriptors */
1433         err = e1000_setup_all_rx_resources(adapter);
1434         if (err)
1435                 goto err_setup_rx;
1436
1437         e1000_power_up_phy(adapter);
1438
1439         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1440         if ((hw->mng_cookie.status &
1441                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1442                 e1000_update_mng_vlan(adapter);
1443         }
1444
1445         /* If AMT is enabled, let the firmware know that the network
1446          * interface is now open */
1447         if (hw->mac_type == e1000_82573 &&
1448             e1000_check_mng_mode(hw))
1449                 e1000_get_hw_control(adapter);
1450
1451         /* before we allocate an interrupt, we must be ready to handle it.
1452          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1453          * as soon as we call pci_request_irq, so we have to setup our
1454          * clean_rx handler before we do so.  */
1455         e1000_configure(adapter);
1456
1457         err = e1000_request_irq(adapter);
1458         if (err)
1459                 goto err_req_irq;
1460
1461         /* From here on the code is the same as e1000_up() */
1462         clear_bit(__E1000_DOWN, &adapter->flags);
1463
1464         napi_enable(&adapter->napi);
1465
1466         e1000_irq_enable(adapter);
1467
1468         netif_start_queue(netdev);
1469
1470         /* fire a link status change interrupt to start the watchdog */
1471         ew32(ICS, E1000_ICS_LSC);
1472
1473         return E1000_SUCCESS;
1474
1475 err_req_irq:
1476         e1000_release_hw_control(adapter);
1477         e1000_power_down_phy(adapter);
1478         e1000_free_all_rx_resources(adapter);
1479 err_setup_rx:
1480         e1000_free_all_tx_resources(adapter);
1481 err_setup_tx:
1482         e1000_reset(adapter);
1483
1484         return err;
1485 }
1486
1487 /**
1488  * e1000_close - Disables a network interface
1489  * @netdev: network interface device structure
1490  *
1491  * Returns 0, this is not allowed to fail
1492  *
1493  * The close entry point is called when an interface is de-activated
1494  * by the OS.  The hardware is still under the drivers control, but
1495  * needs to be disabled.  A global MAC reset is issued to stop the
1496  * hardware, and all transmit and receive resources are freed.
1497  **/
1498
1499 static int e1000_close(struct net_device *netdev)
1500 {
1501         struct e1000_adapter *adapter = netdev_priv(netdev);
1502         struct e1000_hw *hw = &adapter->hw;
1503
1504         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1505         e1000_down(adapter);
1506         e1000_power_down_phy(adapter);
1507         e1000_free_irq(adapter);
1508
1509         e1000_free_all_tx_resources(adapter);
1510         e1000_free_all_rx_resources(adapter);
1511
1512         /* kill manageability vlan ID if supported, but not if a vlan with
1513          * the same ID is registered on the host OS (let 8021q kill it) */
1514         if ((hw->mng_cookie.status &
1515                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1516              !(adapter->vlgrp &&
1517                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1518                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1519         }
1520
1521         /* If AMT is enabled, let the firmware know that the network
1522          * interface is now closed */
1523         if (hw->mac_type == e1000_82573 &&
1524             e1000_check_mng_mode(hw))
1525                 e1000_release_hw_control(adapter);
1526
1527         return 0;
1528 }
1529
1530 /**
1531  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1532  * @adapter: address of board private structure
1533  * @start: address of beginning of memory
1534  * @len: length of memory
1535  **/
1536 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1537                                   unsigned long len)
1538 {
1539         struct e1000_hw *hw = &adapter->hw;
1540         unsigned long begin = (unsigned long)start;
1541         unsigned long end = begin + len;
1542
1543         /* First rev 82545 and 82546 need to not allow any memory
1544          * write location to cross 64k boundary due to errata 23 */
1545         if (hw->mac_type == e1000_82545 ||
1546             hw->mac_type == e1000_82546) {
1547                 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1548         }
1549
1550         return true;
1551 }
1552
1553 /**
1554  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1555  * @adapter: board private structure
1556  * @txdr:    tx descriptor ring (for a specific queue) to setup
1557  *
1558  * Return 0 on success, negative on failure
1559  **/
1560
1561 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1562                                     struct e1000_tx_ring *txdr)
1563 {
1564         struct pci_dev *pdev = adapter->pdev;
1565         int size;
1566
1567         size = sizeof(struct e1000_buffer) * txdr->count;
1568         txdr->buffer_info = vmalloc(size);
1569         if (!txdr->buffer_info) {
1570                 DPRINTK(PROBE, ERR,
1571                 "Unable to allocate memory for the transmit descriptor ring\n");
1572                 return -ENOMEM;
1573         }
1574         memset(txdr->buffer_info, 0, size);
1575
1576         /* round up to nearest 4K */
1577
1578         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1579         txdr->size = ALIGN(txdr->size, 4096);
1580
1581         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1582         if (!txdr->desc) {
1583 setup_tx_desc_die:
1584                 vfree(txdr->buffer_info);
1585                 DPRINTK(PROBE, ERR,
1586                 "Unable to allocate memory for the transmit descriptor ring\n");
1587                 return -ENOMEM;
1588         }
1589
1590         /* Fix for errata 23, can't cross 64kB boundary */
1591         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1592                 void *olddesc = txdr->desc;
1593                 dma_addr_t olddma = txdr->dma;
1594                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1595                                      "at %p\n", txdr->size, txdr->desc);
1596                 /* Try again, without freeing the previous */
1597                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1598                 /* Failed allocation, critical failure */
1599                 if (!txdr->desc) {
1600                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1601                         goto setup_tx_desc_die;
1602                 }
1603
1604                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1605                         /* give up */
1606                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1607                                             txdr->dma);
1608                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1609                         DPRINTK(PROBE, ERR,
1610                                 "Unable to allocate aligned memory "
1611                                 "for the transmit descriptor ring\n");
1612                         vfree(txdr->buffer_info);
1613                         return -ENOMEM;
1614                 } else {
1615                         /* Free old allocation, new allocation was successful */
1616                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1617                 }
1618         }
1619         memset(txdr->desc, 0, txdr->size);
1620
1621         txdr->next_to_use = 0;
1622         txdr->next_to_clean = 0;
1623
1624         return 0;
1625 }
1626
1627 /**
1628  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1629  *                                (Descriptors) for all queues
1630  * @adapter: board private structure
1631  *
1632  * Return 0 on success, negative on failure
1633  **/
1634
1635 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1636 {
1637         int i, err = 0;
1638
1639         for (i = 0; i < adapter->num_tx_queues; i++) {
1640                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1641                 if (err) {
1642                         DPRINTK(PROBE, ERR,
1643                                 "Allocation for Tx Queue %u failed\n", i);
1644                         for (i-- ; i >= 0; i--)
1645                                 e1000_free_tx_resources(adapter,
1646                                                         &adapter->tx_ring[i]);
1647                         break;
1648                 }
1649         }
1650
1651         return err;
1652 }
1653
1654 /**
1655  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1656  * @adapter: board private structure
1657  *
1658  * Configure the Tx unit of the MAC after a reset.
1659  **/
1660
1661 static void e1000_configure_tx(struct e1000_adapter *adapter)
1662 {
1663         u64 tdba;
1664         struct e1000_hw *hw = &adapter->hw;
1665         u32 tdlen, tctl, tipg, tarc;
1666         u32 ipgr1, ipgr2;
1667
1668         /* Setup the HW Tx Head and Tail descriptor pointers */
1669
1670         switch (adapter->num_tx_queues) {
1671         case 1:
1672         default:
1673                 tdba = adapter->tx_ring[0].dma;
1674                 tdlen = adapter->tx_ring[0].count *
1675                         sizeof(struct e1000_tx_desc);
1676                 ew32(TDLEN, tdlen);
1677                 ew32(TDBAH, (tdba >> 32));
1678                 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1679                 ew32(TDT, 0);
1680                 ew32(TDH, 0);
1681                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1682                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1683                 break;
1684         }
1685
1686         /* Set the default values for the Tx Inter Packet Gap timer */
1687         if (hw->mac_type <= e1000_82547_rev_2 &&
1688             (hw->media_type == e1000_media_type_fiber ||
1689              hw->media_type == e1000_media_type_internal_serdes))
1690                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1691         else
1692                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1693
1694         switch (hw->mac_type) {
1695         case e1000_82542_rev2_0:
1696         case e1000_82542_rev2_1:
1697                 tipg = DEFAULT_82542_TIPG_IPGT;
1698                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1699                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1700                 break;
1701         case e1000_80003es2lan:
1702                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1703                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1704                 break;
1705         default:
1706                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1707                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1708                 break;
1709         }
1710         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1711         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1712         ew32(TIPG, tipg);
1713
1714         /* Set the Tx Interrupt Delay register */
1715
1716         ew32(TIDV, adapter->tx_int_delay);
1717         if (hw->mac_type >= e1000_82540)
1718                 ew32(TADV, adapter->tx_abs_int_delay);
1719
1720         /* Program the Transmit Control Register */
1721
1722         tctl = er32(TCTL);
1723         tctl &= ~E1000_TCTL_CT;
1724         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1725                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1726
1727         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1728                 tarc = er32(TARC0);
1729                 /* set the speed mode bit, we'll clear it if we're not at
1730                  * gigabit link later */
1731                 tarc |= (1 << 21);
1732                 ew32(TARC0, tarc);
1733         } else if (hw->mac_type == e1000_80003es2lan) {
1734                 tarc = er32(TARC0);
1735                 tarc |= 1;
1736                 ew32(TARC0, tarc);
1737                 tarc = er32(TARC1);
1738                 tarc |= 1;
1739                 ew32(TARC1, tarc);
1740         }
1741
1742         e1000_config_collision_dist(hw);
1743
1744         /* Setup Transmit Descriptor Settings for eop descriptor */
1745         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1746
1747         /* only set IDE if we are delaying interrupts using the timers */
1748         if (adapter->tx_int_delay)
1749                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1750
1751         if (hw->mac_type < e1000_82543)
1752                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1753         else
1754                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1755
1756         /* Cache if we're 82544 running in PCI-X because we'll
1757          * need this to apply a workaround later in the send path. */
1758         if (hw->mac_type == e1000_82544 &&
1759             hw->bus_type == e1000_bus_type_pcix)
1760                 adapter->pcix_82544 = 1;
1761
1762         ew32(TCTL, tctl);
1763
1764 }
1765
1766 /**
1767  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1768  * @adapter: board private structure
1769  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1770  *
1771  * Returns 0 on success, negative on failure
1772  **/
1773
1774 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1775                                     struct e1000_rx_ring *rxdr)
1776 {
1777         struct e1000_hw *hw = &adapter->hw;
1778         struct pci_dev *pdev = adapter->pdev;
1779         int size, desc_len;
1780
1781         size = sizeof(struct e1000_buffer) * rxdr->count;
1782         rxdr->buffer_info = vmalloc(size);
1783         if (!rxdr->buffer_info) {
1784                 DPRINTK(PROBE, ERR,
1785                 "Unable to allocate memory for the receive descriptor ring\n");
1786                 return -ENOMEM;
1787         }
1788         memset(rxdr->buffer_info, 0, size);
1789
1790         if (hw->mac_type <= e1000_82547_rev_2)
1791                 desc_len = sizeof(struct e1000_rx_desc);
1792         else
1793                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1794
1795         /* Round up to nearest 4K */
1796
1797         rxdr->size = rxdr->count * desc_len;
1798         rxdr->size = ALIGN(rxdr->size, 4096);
1799
1800         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1801
1802         if (!rxdr->desc) {
1803                 DPRINTK(PROBE, ERR,
1804                 "Unable to allocate memory for the receive descriptor ring\n");
1805 setup_rx_desc_die:
1806                 vfree(rxdr->buffer_info);
1807                 return -ENOMEM;
1808         }
1809
1810         /* Fix for errata 23, can't cross 64kB boundary */
1811         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1812                 void *olddesc = rxdr->desc;
1813                 dma_addr_t olddma = rxdr->dma;
1814                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1815                                      "at %p\n", rxdr->size, rxdr->desc);
1816                 /* Try again, without freeing the previous */
1817                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1818                 /* Failed allocation, critical failure */
1819                 if (!rxdr->desc) {
1820                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1821                         DPRINTK(PROBE, ERR,
1822                                 "Unable to allocate memory "
1823                                 "for the receive descriptor ring\n");
1824                         goto setup_rx_desc_die;
1825                 }
1826
1827                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1828                         /* give up */
1829                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1830                                             rxdr->dma);
1831                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1832                         DPRINTK(PROBE, ERR,
1833                                 "Unable to allocate aligned memory "
1834                                 "for the receive descriptor ring\n");
1835                         goto setup_rx_desc_die;
1836                 } else {
1837                         /* Free old allocation, new allocation was successful */
1838                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1839                 }
1840         }
1841         memset(rxdr->desc, 0, rxdr->size);
1842
1843         rxdr->next_to_clean = 0;
1844         rxdr->next_to_use = 0;
1845
1846         return 0;
1847 }
1848
1849 /**
1850  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1851  *                                (Descriptors) for all queues
1852  * @adapter: board private structure
1853  *
1854  * Return 0 on success, negative on failure
1855  **/
1856
1857 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1858 {
1859         int i, err = 0;
1860
1861         for (i = 0; i < adapter->num_rx_queues; i++) {
1862                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1863                 if (err) {
1864                         DPRINTK(PROBE, ERR,
1865                                 "Allocation for Rx Queue %u failed\n", i);
1866                         for (i-- ; i >= 0; i--)
1867                                 e1000_free_rx_resources(adapter,
1868                                                         &adapter->rx_ring[i]);
1869                         break;
1870                 }
1871         }
1872
1873         return err;
1874 }
1875
1876 /**
1877  * e1000_setup_rctl - configure the receive control registers
1878  * @adapter: Board private structure
1879  **/
1880 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1881 {
1882         struct e1000_hw *hw = &adapter->hw;
1883         u32 rctl;
1884
1885         rctl = er32(RCTL);
1886
1887         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1888
1889         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1890                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1891                 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1892
1893         if (hw->tbi_compatibility_on == 1)
1894                 rctl |= E1000_RCTL_SBP;
1895         else
1896                 rctl &= ~E1000_RCTL_SBP;
1897
1898         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1899                 rctl &= ~E1000_RCTL_LPE;
1900         else
1901                 rctl |= E1000_RCTL_LPE;
1902
1903         /* Setup buffer sizes */
1904         rctl &= ~E1000_RCTL_SZ_4096;
1905         rctl |= E1000_RCTL_BSEX;
1906         switch (adapter->rx_buffer_len) {
1907                 case E1000_RXBUFFER_256:
1908                         rctl |= E1000_RCTL_SZ_256;
1909                         rctl &= ~E1000_RCTL_BSEX;
1910                         break;
1911                 case E1000_RXBUFFER_512:
1912                         rctl |= E1000_RCTL_SZ_512;
1913                         rctl &= ~E1000_RCTL_BSEX;
1914                         break;
1915                 case E1000_RXBUFFER_1024:
1916                         rctl |= E1000_RCTL_SZ_1024;
1917                         rctl &= ~E1000_RCTL_BSEX;
1918                         break;
1919                 case E1000_RXBUFFER_2048:
1920                 default:
1921                         rctl |= E1000_RCTL_SZ_2048;
1922                         rctl &= ~E1000_RCTL_BSEX;
1923                         break;
1924                 case E1000_RXBUFFER_4096:
1925                         rctl |= E1000_RCTL_SZ_4096;
1926                         break;
1927                 case E1000_RXBUFFER_8192:
1928                         rctl |= E1000_RCTL_SZ_8192;
1929                         break;
1930                 case E1000_RXBUFFER_16384:
1931                         rctl |= E1000_RCTL_SZ_16384;
1932                         break;
1933         }
1934
1935         ew32(RCTL, rctl);
1936 }
1937
1938 /**
1939  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1940  * @adapter: board private structure
1941  *
1942  * Configure the Rx unit of the MAC after a reset.
1943  **/
1944
1945 static void e1000_configure_rx(struct e1000_adapter *adapter)
1946 {
1947         u64 rdba;
1948         struct e1000_hw *hw = &adapter->hw;
1949         u32 rdlen, rctl, rxcsum, ctrl_ext;
1950
1951         rdlen = adapter->rx_ring[0].count *
1952                 sizeof(struct e1000_rx_desc);
1953         adapter->clean_rx = e1000_clean_rx_irq;
1954         adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1955
1956         /* disable receives while setting up the descriptors */
1957         rctl = er32(RCTL);
1958         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1959
1960         /* set the Receive Delay Timer Register */
1961         ew32(RDTR, adapter->rx_int_delay);
1962
1963         if (hw->mac_type >= e1000_82540) {
1964                 ew32(RADV, adapter->rx_abs_int_delay);
1965                 if (adapter->itr_setting != 0)
1966                         ew32(ITR, 1000000000 / (adapter->itr * 256));
1967         }
1968
1969         if (hw->mac_type >= e1000_82571) {
1970                 ctrl_ext = er32(CTRL_EXT);
1971                 /* Reset delay timers after every interrupt */
1972                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1973                 /* Auto-Mask interrupts upon ICR access */
1974                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1975                 ew32(IAM, 0xffffffff);
1976                 ew32(CTRL_EXT, ctrl_ext);
1977                 E1000_WRITE_FLUSH();
1978         }
1979
1980         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1981          * the Base and Length of the Rx Descriptor Ring */
1982         switch (adapter->num_rx_queues) {
1983         case 1:
1984         default:
1985                 rdba = adapter->rx_ring[0].dma;
1986                 ew32(RDLEN, rdlen);
1987                 ew32(RDBAH, (rdba >> 32));
1988                 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1989                 ew32(RDT, 0);
1990                 ew32(RDH, 0);
1991                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1992                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1993                 break;
1994         }
1995
1996         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1997         if (hw->mac_type >= e1000_82543) {
1998                 rxcsum = er32(RXCSUM);
1999                 if (adapter->rx_csum)
2000                         rxcsum |= E1000_RXCSUM_TUOFL;
2001                 else
2002                         /* don't need to clear IPPCSE as it defaults to 0 */
2003                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2004                 ew32(RXCSUM, rxcsum);
2005         }
2006
2007         /* Enable Receives */
2008         ew32(RCTL, rctl);
2009 }
2010
2011 /**
2012  * e1000_free_tx_resources - Free Tx Resources per Queue
2013  * @adapter: board private structure
2014  * @tx_ring: Tx descriptor ring for a specific queue
2015  *
2016  * Free all transmit software resources
2017  **/
2018
2019 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2020                                     struct e1000_tx_ring *tx_ring)
2021 {
2022         struct pci_dev *pdev = adapter->pdev;
2023
2024         e1000_clean_tx_ring(adapter, tx_ring);
2025
2026         vfree(tx_ring->buffer_info);
2027         tx_ring->buffer_info = NULL;
2028
2029         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2030
2031         tx_ring->desc = NULL;
2032 }
2033
2034 /**
2035  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2036  * @adapter: board private structure
2037  *
2038  * Free all transmit software resources
2039  **/
2040
2041 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2042 {
2043         int i;
2044
2045         for (i = 0; i < adapter->num_tx_queues; i++)
2046                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2047 }
2048
2049 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2050                                              struct e1000_buffer *buffer_info)
2051 {
2052         buffer_info->dma = 0;
2053         if (buffer_info->skb) {
2054                 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
2055                               DMA_TO_DEVICE);
2056                 dev_kfree_skb_any(buffer_info->skb);
2057                 buffer_info->skb = NULL;
2058         }
2059         /* buffer_info must be completely set up in the transmit path */
2060 }
2061
2062 /**
2063  * e1000_clean_tx_ring - Free Tx Buffers
2064  * @adapter: board private structure
2065  * @tx_ring: ring to be cleaned
2066  **/
2067
2068 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2069                                 struct e1000_tx_ring *tx_ring)
2070 {
2071         struct e1000_hw *hw = &adapter->hw;
2072         struct e1000_buffer *buffer_info;
2073         unsigned long size;
2074         unsigned int i;
2075
2076         /* Free all the Tx ring sk_buffs */
2077
2078         for (i = 0; i < tx_ring->count; i++) {
2079                 buffer_info = &tx_ring->buffer_info[i];
2080                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2081         }
2082
2083         size = sizeof(struct e1000_buffer) * tx_ring->count;
2084         memset(tx_ring->buffer_info, 0, size);
2085
2086         /* Zero out the descriptor ring */
2087
2088         memset(tx_ring->desc, 0, tx_ring->size);
2089
2090         tx_ring->next_to_use = 0;
2091         tx_ring->next_to_clean = 0;
2092         tx_ring->last_tx_tso = 0;
2093
2094         writel(0, hw->hw_addr + tx_ring->tdh);
2095         writel(0, hw->hw_addr + tx_ring->tdt);
2096 }
2097
2098 /**
2099  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2100  * @adapter: board private structure
2101  **/
2102
2103 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2104 {
2105         int i;
2106
2107         for (i = 0; i < adapter->num_tx_queues; i++)
2108                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2109 }
2110
2111 /**
2112  * e1000_free_rx_resources - Free Rx Resources
2113  * @adapter: board private structure
2114  * @rx_ring: ring to clean the resources from
2115  *
2116  * Free all receive software resources
2117  **/
2118
2119 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2120                                     struct e1000_rx_ring *rx_ring)
2121 {
2122         struct pci_dev *pdev = adapter->pdev;
2123
2124         e1000_clean_rx_ring(adapter, rx_ring);
2125
2126         vfree(rx_ring->buffer_info);
2127         rx_ring->buffer_info = NULL;
2128
2129         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2130
2131         rx_ring->desc = NULL;
2132 }
2133
2134 /**
2135  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2136  * @adapter: board private structure
2137  *
2138  * Free all receive software resources
2139  **/
2140
2141 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2142 {
2143         int i;
2144
2145         for (i = 0; i < adapter->num_rx_queues; i++)
2146                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2147 }
2148
2149 /**
2150  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2151  * @adapter: board private structure
2152  * @rx_ring: ring to free buffers from
2153  **/
2154
2155 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2156                                 struct e1000_rx_ring *rx_ring)
2157 {
2158         struct e1000_hw *hw = &adapter->hw;
2159         struct e1000_buffer *buffer_info;
2160         struct pci_dev *pdev = adapter->pdev;
2161         unsigned long size;
2162         unsigned int i;
2163
2164         /* Free all the Rx ring sk_buffs */
2165         for (i = 0; i < rx_ring->count; i++) {
2166                 buffer_info = &rx_ring->buffer_info[i];
2167                 if (buffer_info->skb) {
2168                         pci_unmap_single(pdev,
2169                                          buffer_info->dma,
2170                                          buffer_info->length,
2171                                          PCI_DMA_FROMDEVICE);
2172
2173                         dev_kfree_skb(buffer_info->skb);
2174                         buffer_info->skb = NULL;
2175                 }
2176         }
2177
2178         size = sizeof(struct e1000_buffer) * rx_ring->count;
2179         memset(rx_ring->buffer_info, 0, size);
2180
2181         /* Zero out the descriptor ring */
2182
2183         memset(rx_ring->desc, 0, rx_ring->size);
2184
2185         rx_ring->next_to_clean = 0;
2186         rx_ring->next_to_use = 0;
2187
2188         writel(0, hw->hw_addr + rx_ring->rdh);
2189         writel(0, hw->hw_addr + rx_ring->rdt);
2190 }
2191
2192 /**
2193  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2194  * @adapter: board private structure
2195  **/
2196
2197 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2198 {
2199         int i;
2200
2201         for (i = 0; i < adapter->num_rx_queues; i++)
2202                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2203 }
2204
2205 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2206  * and memory write and invalidate disabled for certain operations
2207  */
2208 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2209 {
2210         struct e1000_hw *hw = &adapter->hw;
2211         struct net_device *netdev = adapter->netdev;
2212         u32 rctl;
2213
2214         e1000_pci_clear_mwi(hw);
2215
2216         rctl = er32(RCTL);
2217         rctl |= E1000_RCTL_RST;
2218         ew32(RCTL, rctl);
2219         E1000_WRITE_FLUSH();
2220         mdelay(5);
2221
2222         if (netif_running(netdev))
2223                 e1000_clean_all_rx_rings(adapter);
2224 }
2225
2226 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2227 {
2228         struct e1000_hw *hw = &adapter->hw;
2229         struct net_device *netdev = adapter->netdev;
2230         u32 rctl;
2231
2232         rctl = er32(RCTL);
2233         rctl &= ~E1000_RCTL_RST;
2234         ew32(RCTL, rctl);
2235         E1000_WRITE_FLUSH();
2236         mdelay(5);
2237
2238         if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2239                 e1000_pci_set_mwi(hw);
2240
2241         if (netif_running(netdev)) {
2242                 /* No need to loop, because 82542 supports only 1 queue */
2243                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2244                 e1000_configure_rx(adapter);
2245                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2246         }
2247 }
2248
2249 /**
2250  * e1000_set_mac - Change the Ethernet Address of the NIC
2251  * @netdev: network interface device structure
2252  * @p: pointer to an address structure
2253  *
2254  * Returns 0 on success, negative on failure
2255  **/
2256
2257 static int e1000_set_mac(struct net_device *netdev, void *p)
2258 {
2259         struct e1000_adapter *adapter = netdev_priv(netdev);
2260         struct e1000_hw *hw = &adapter->hw;
2261         struct sockaddr *addr = p;
2262
2263         if (!is_valid_ether_addr(addr->sa_data))
2264                 return -EADDRNOTAVAIL;
2265
2266         /* 82542 2.0 needs to be in reset to write receive address registers */
2267
2268         if (hw->mac_type == e1000_82542_rev2_0)
2269                 e1000_enter_82542_rst(adapter);
2270
2271         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2272         memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2273
2274         e1000_rar_set(hw, hw->mac_addr, 0);
2275
2276         /* With 82571 controllers, LAA may be overwritten (with the default)
2277          * due to controller reset from the other port. */
2278         if (hw->mac_type == e1000_82571) {
2279                 /* activate the work around */
2280                 hw->laa_is_present = 1;
2281
2282                 /* Hold a copy of the LAA in RAR[14] This is done so that
2283                  * between the time RAR[0] gets clobbered  and the time it
2284                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2285                  * of the RARs and no incoming packets directed to this port
2286                  * are dropped. Eventaully the LAA will be in RAR[0] and
2287                  * RAR[14] */
2288                 e1000_rar_set(hw, hw->mac_addr,
2289                                         E1000_RAR_ENTRIES - 1);
2290         }
2291
2292         if (hw->mac_type == e1000_82542_rev2_0)
2293                 e1000_leave_82542_rst(adapter);
2294
2295         return 0;
2296 }
2297
2298 /**
2299  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2300  * @netdev: network interface device structure
2301  *
2302  * The set_rx_mode entry point is called whenever the unicast or multicast
2303  * address lists or the network interface flags are updated. This routine is
2304  * responsible for configuring the hardware for proper unicast, multicast,
2305  * promiscuous mode, and all-multi behavior.
2306  **/
2307
2308 static void e1000_set_rx_mode(struct net_device *netdev)
2309 {
2310         struct e1000_adapter *adapter = netdev_priv(netdev);
2311         struct e1000_hw *hw = &adapter->hw;
2312         struct dev_addr_list *uc_ptr;
2313         struct dev_addr_list *mc_ptr;
2314         u32 rctl;
2315         u32 hash_value;
2316         int i, rar_entries = E1000_RAR_ENTRIES;
2317         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2318                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2319                                 E1000_NUM_MTA_REGISTERS;
2320
2321         if (hw->mac_type == e1000_ich8lan)
2322                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2323
2324         /* reserve RAR[14] for LAA over-write work-around */
2325         if (hw->mac_type == e1000_82571)
2326                 rar_entries--;
2327
2328         /* Check for Promiscuous and All Multicast modes */
2329
2330         rctl = er32(RCTL);
2331
2332         if (netdev->flags & IFF_PROMISC) {
2333                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2334                 rctl &= ~E1000_RCTL_VFE;
2335         } else {
2336                 if (netdev->flags & IFF_ALLMULTI) {
2337                         rctl |= E1000_RCTL_MPE;
2338                 } else {
2339                         rctl &= ~E1000_RCTL_MPE;
2340                 }
2341                 if (adapter->hw.mac_type != e1000_ich8lan)
2342                         rctl |= E1000_RCTL_VFE;
2343         }
2344
2345         uc_ptr = NULL;
2346         if (netdev->uc_count > rar_entries - 1) {
2347                 rctl |= E1000_RCTL_UPE;
2348         } else if (!(netdev->flags & IFF_PROMISC)) {
2349                 rctl &= ~E1000_RCTL_UPE;
2350                 uc_ptr = netdev->uc_list;
2351         }
2352
2353         ew32(RCTL, rctl);
2354
2355         /* 82542 2.0 needs to be in reset to write receive address registers */
2356
2357         if (hw->mac_type == e1000_82542_rev2_0)
2358                 e1000_enter_82542_rst(adapter);
2359
2360         /* load the first 14 addresses into the exact filters 1-14. Unicast
2361          * addresses take precedence to avoid disabling unicast filtering
2362          * when possible.
2363          *
2364          * RAR 0 is used for the station MAC adddress
2365          * if there are not 14 addresses, go ahead and clear the filters
2366          * -- with 82571 controllers only 0-13 entries are filled here
2367          */
2368         mc_ptr = netdev->mc_list;
2369
2370         for (i = 1; i < rar_entries; i++) {
2371                 if (uc_ptr) {
2372                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2373                         uc_ptr = uc_ptr->next;
2374                 } else if (mc_ptr) {
2375                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2376                         mc_ptr = mc_ptr->next;
2377                 } else {
2378                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2379                         E1000_WRITE_FLUSH();
2380                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2381                         E1000_WRITE_FLUSH();
2382                 }
2383         }
2384         WARN_ON(uc_ptr != NULL);
2385
2386         /* clear the old settings from the multicast hash table */
2387
2388         for (i = 0; i < mta_reg_count; i++) {
2389                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2390                 E1000_WRITE_FLUSH();
2391         }
2392
2393         /* load any remaining addresses into the hash table */
2394
2395         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2396                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2397                 e1000_mta_set(hw, hash_value);
2398         }
2399
2400         if (hw->mac_type == e1000_82542_rev2_0)
2401                 e1000_leave_82542_rst(adapter);
2402 }
2403
2404 /* Need to wait a few seconds after link up to get diagnostic information from
2405  * the phy */
2406
2407 static void e1000_update_phy_info(unsigned long data)
2408 {
2409         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2410         struct e1000_hw *hw = &adapter->hw;
2411         e1000_phy_get_info(hw, &adapter->phy_info);
2412 }
2413
2414 /**
2415  * e1000_82547_tx_fifo_stall - Timer Call-back
2416  * @data: pointer to adapter cast into an unsigned long
2417  **/
2418
2419 static void e1000_82547_tx_fifo_stall(unsigned long data)
2420 {
2421         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2422         struct e1000_hw *hw = &adapter->hw;
2423         struct net_device *netdev = adapter->netdev;
2424         u32 tctl;
2425
2426         if (atomic_read(&adapter->tx_fifo_stall)) {
2427                 if ((er32(TDT) == er32(TDH)) &&
2428                    (er32(TDFT) == er32(TDFH)) &&
2429                    (er32(TDFTS) == er32(TDFHS))) {
2430                         tctl = er32(TCTL);
2431                         ew32(TCTL, tctl & ~E1000_TCTL_EN);
2432                         ew32(TDFT, adapter->tx_head_addr);
2433                         ew32(TDFH, adapter->tx_head_addr);
2434                         ew32(TDFTS, adapter->tx_head_addr);
2435                         ew32(TDFHS, adapter->tx_head_addr);
2436                         ew32(TCTL, tctl);
2437                         E1000_WRITE_FLUSH();
2438
2439                         adapter->tx_fifo_head = 0;
2440                         atomic_set(&adapter->tx_fifo_stall, 0);
2441                         netif_wake_queue(netdev);
2442                 } else {
2443                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2444                 }
2445         }
2446 }
2447
2448 /**
2449  * e1000_watchdog - Timer Call-back
2450  * @data: pointer to adapter cast into an unsigned long
2451  **/
2452 static void e1000_watchdog(unsigned long data)
2453 {
2454         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2455         struct e1000_hw *hw = &adapter->hw;
2456         struct net_device *netdev = adapter->netdev;
2457         struct e1000_tx_ring *txdr = adapter->tx_ring;
2458         u32 link, tctl;
2459         s32 ret_val;
2460
2461         ret_val = e1000_check_for_link(hw);
2462         if ((ret_val == E1000_ERR_PHY) &&
2463             (hw->phy_type == e1000_phy_igp_3) &&
2464             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2465                 /* See e1000_kumeran_lock_loss_workaround() */
2466                 DPRINTK(LINK, INFO,
2467                         "Gigabit has been disabled, downgrading speed\n");
2468         }
2469
2470         if (hw->mac_type == e1000_82573) {
2471                 e1000_enable_tx_pkt_filtering(hw);
2472                 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2473                         e1000_update_mng_vlan(adapter);
2474         }
2475
2476         if ((hw->media_type == e1000_media_type_internal_serdes) &&
2477            !(er32(TXCW) & E1000_TXCW_ANE))
2478                 link = !hw->serdes_link_down;
2479         else
2480                 link = er32(STATUS) & E1000_STATUS_LU;
2481
2482         if (link) {
2483                 if (!netif_carrier_ok(netdev)) {
2484                         u32 ctrl;
2485                         bool txb2b = true;
2486                         e1000_get_speed_and_duplex(hw,
2487                                                    &adapter->link_speed,
2488                                                    &adapter->link_duplex);
2489
2490                         ctrl = er32(CTRL);
2491                         printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s, "
2492                                "Flow Control: %s\n",
2493                                netdev->name,
2494                                adapter->link_speed,
2495                                adapter->link_duplex == FULL_DUPLEX ?
2496                                 "Full Duplex" : "Half Duplex",
2497                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2498                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2499                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2500                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2501
2502                         /* tweak tx_queue_len according to speed/duplex
2503                          * and adjust the timeout factor */
2504                         netdev->tx_queue_len = adapter->tx_queue_len;
2505                         adapter->tx_timeout_factor = 1;
2506                         switch (adapter->link_speed) {
2507                         case SPEED_10:
2508                                 txb2b = false;
2509                                 netdev->tx_queue_len = 10;
2510                                 adapter->tx_timeout_factor = 8;
2511                                 break;
2512                         case SPEED_100:
2513                                 txb2b = false;
2514                                 netdev->tx_queue_len = 100;
2515                                 /* maybe add some timeout factor ? */
2516                                 break;
2517                         }
2518
2519                         if ((hw->mac_type == e1000_82571 ||
2520                              hw->mac_type == e1000_82572) &&
2521                             !txb2b) {
2522                                 u32 tarc0;
2523                                 tarc0 = er32(TARC0);
2524                                 tarc0 &= ~(1 << 21);
2525                                 ew32(TARC0, tarc0);
2526                         }
2527
2528                         /* disable TSO for pcie and 10/100 speeds, to avoid
2529                          * some hardware issues */
2530                         if (!adapter->tso_force &&
2531                             hw->bus_type == e1000_bus_type_pci_express){
2532                                 switch (adapter->link_speed) {
2533                                 case SPEED_10:
2534                                 case SPEED_100:
2535                                         DPRINTK(PROBE,INFO,
2536                                         "10/100 speed: disabling TSO\n");
2537                                         netdev->features &= ~NETIF_F_TSO;
2538                                         netdev->features &= ~NETIF_F_TSO6;
2539                                         break;
2540                                 case SPEED_1000:
2541                                         netdev->features |= NETIF_F_TSO;
2542                                         netdev->features |= NETIF_F_TSO6;
2543                                         break;
2544                                 default:
2545                                         /* oops */
2546                                         break;
2547                                 }
2548                         }
2549
2550                         /* enable transmits in the hardware, need to do this
2551                          * after setting TARC0 */
2552                         tctl = er32(TCTL);
2553                         tctl |= E1000_TCTL_EN;
2554                         ew32(TCTL, tctl);
2555
2556                         netif_carrier_on(netdev);
2557                         netif_wake_queue(netdev);
2558                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2559                         adapter->smartspeed = 0;
2560                 } else {
2561                         /* make sure the receive unit is started */
2562                         if (hw->rx_needs_kicking) {
2563                                 u32 rctl = er32(RCTL);
2564                                 ew32(RCTL, rctl | E1000_RCTL_EN);
2565                         }
2566                 }
2567         } else {
2568                 if (netif_carrier_ok(netdev)) {
2569                         adapter->link_speed = 0;
2570                         adapter->link_duplex = 0;
2571                         printk(KERN_INFO "e1000: %s NIC Link is Down\n",
2572                                netdev->name);
2573                         netif_carrier_off(netdev);
2574                         netif_stop_queue(netdev);
2575                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2576
2577                         /* 80003ES2LAN workaround--
2578                          * For packet buffer work-around on link down event;
2579                          * disable receives in the ISR and
2580                          * reset device here in the watchdog
2581                          */
2582                         if (hw->mac_type == e1000_80003es2lan)
2583                                 /* reset device */
2584                                 schedule_work(&adapter->reset_task);
2585                 }
2586
2587                 e1000_smartspeed(adapter);
2588         }
2589
2590         e1000_update_stats(adapter);
2591
2592         hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2593         adapter->tpt_old = adapter->stats.tpt;
2594         hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2595         adapter->colc_old = adapter->stats.colc;
2596
2597         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2598         adapter->gorcl_old = adapter->stats.gorcl;
2599         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2600         adapter->gotcl_old = adapter->stats.gotcl;
2601
2602         e1000_update_adaptive(hw);
2603
2604         if (!netif_carrier_ok(netdev)) {
2605                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2606                         /* We've lost link, so the controller stops DMA,
2607                          * but we've got queued Tx work that's never going
2608                          * to get done, so reset controller to flush Tx.
2609                          * (Do the reset outside of interrupt context). */
2610                         adapter->tx_timeout_count++;
2611                         schedule_work(&adapter->reset_task);
2612                 }
2613         }
2614
2615         /* Cause software interrupt to ensure rx ring is cleaned */
2616         ew32(ICS, E1000_ICS_RXDMT0);
2617
2618         /* Force detection of hung controller every watchdog period */
2619         adapter->detect_tx_hung = true;
2620
2621         /* With 82571 controllers, LAA may be overwritten due to controller
2622          * reset from the other port. Set the appropriate LAA in RAR[0] */
2623         if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2624                 e1000_rar_set(hw, hw->mac_addr, 0);
2625
2626         /* Reset the timer */
2627         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2628 }
2629
2630 enum latency_range {
2631         lowest_latency = 0,
2632         low_latency = 1,
2633         bulk_latency = 2,
2634         latency_invalid = 255
2635 };
2636
2637 /**
2638  * e1000_update_itr - update the dynamic ITR value based on statistics
2639  *      Stores a new ITR value based on packets and byte
2640  *      counts during the last interrupt.  The advantage of per interrupt
2641  *      computation is faster updates and more accurate ITR for the current
2642  *      traffic pattern.  Constants in this function were computed
2643  *      based on theoretical maximum wire speed and thresholds were set based
2644  *      on testing data as well as attempting to minimize response time
2645  *      while increasing bulk throughput.
2646  *      this functionality is controlled by the InterruptThrottleRate module
2647  *      parameter (see e1000_param.c)
2648  * @adapter: pointer to adapter
2649  * @itr_setting: current adapter->itr
2650  * @packets: the number of packets during this measurement interval
2651  * @bytes: the number of bytes during this measurement interval
2652  **/
2653 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2654                                      u16 itr_setting, int packets, int bytes)
2655 {
2656         unsigned int retval = itr_setting;
2657         struct e1000_hw *hw = &adapter->hw;
2658
2659         if (unlikely(hw->mac_type < e1000_82540))
2660                 goto update_itr_done;
2661
2662         if (packets == 0)
2663                 goto update_itr_done;
2664
2665         switch (itr_setting) {
2666         case lowest_latency:
2667                 /* jumbo frames get bulk treatment*/
2668                 if (bytes/packets > 8000)
2669                         retval = bulk_latency;
2670                 else if ((packets < 5) && (bytes > 512))
2671                         retval = low_latency;
2672                 break;
2673         case low_latency:  /* 50 usec aka 20000 ints/s */
2674                 if (bytes > 10000) {
2675                         /* jumbo frames need bulk latency setting */
2676                         if (bytes/packets > 8000)
2677                                 retval = bulk_latency;
2678                         else if ((packets < 10) || ((bytes/packets) > 1200))
2679                                 retval = bulk_latency;
2680                         else if ((packets > 35))
2681                                 retval = lowest_latency;
2682                 } else if (bytes/packets > 2000)
2683                         retval = bulk_latency;
2684                 else if (packets <= 2 && bytes < 512)
2685                         retval = lowest_latency;
2686                 break;
2687         case bulk_latency: /* 250 usec aka 4000 ints/s */
2688                 if (bytes > 25000) {
2689                         if (packets > 35)
2690                                 retval = low_latency;
2691                 } else if (bytes < 6000) {
2692                         retval = low_latency;
2693                 }
2694                 break;
2695         }
2696
2697 update_itr_done:
2698         return retval;
2699 }
2700
2701 static void e1000_set_itr(struct e1000_adapter *adapter)
2702 {
2703         struct e1000_hw *hw = &adapter->hw;
2704         u16 current_itr;
2705         u32 new_itr = adapter->itr;
2706
2707         if (unlikely(hw->mac_type < e1000_82540))
2708                 return;
2709
2710         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2711         if (unlikely(adapter->link_speed != SPEED_1000)) {
2712                 current_itr = 0;
2713                 new_itr = 4000;
2714                 goto set_itr_now;
2715         }
2716
2717         adapter->tx_itr = e1000_update_itr(adapter,
2718                                     adapter->tx_itr,
2719                                     adapter->total_tx_packets,
2720                                     adapter->total_tx_bytes);
2721         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2722         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2723                 adapter->tx_itr = low_latency;
2724
2725         adapter->rx_itr = e1000_update_itr(adapter,
2726                                     adapter->rx_itr,
2727                                     adapter->total_rx_packets,
2728                                     adapter->total_rx_bytes);
2729         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2730         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2731                 adapter->rx_itr = low_latency;
2732
2733         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2734
2735         switch (current_itr) {
2736         /* counts and packets in update_itr are dependent on these numbers */
2737         case lowest_latency:
2738                 new_itr = 70000;
2739                 break;
2740         case low_latency:
2741                 new_itr = 20000; /* aka hwitr = ~200 */
2742                 break;
2743         case bulk_latency:
2744                 new_itr = 4000;
2745                 break;
2746         default:
2747                 break;
2748         }
2749
2750 set_itr_now:
2751         if (new_itr != adapter->itr) {
2752                 /* this attempts to bias the interrupt rate towards Bulk
2753                  * by adding intermediate steps when interrupt rate is
2754                  * increasing */
2755                 new_itr = new_itr > adapter->itr ?
2756                              min(adapter->itr + (new_itr >> 2), new_itr) :
2757                              new_itr;
2758                 adapter->itr = new_itr;
2759                 ew32(ITR, 1000000000 / (new_itr * 256));
2760         }
2761
2762         return;
2763 }
2764
2765 #define E1000_TX_FLAGS_CSUM             0x00000001
2766 #define E1000_TX_FLAGS_VLAN             0x00000002
2767 #define E1000_TX_FLAGS_TSO              0x00000004
2768 #define E1000_TX_FLAGS_IPV4             0x00000008
2769 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2770 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2771
2772 static int e1000_tso(struct e1000_adapter *adapter,
2773                      struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2774 {
2775         struct e1000_context_desc *context_desc;
2776         struct e1000_buffer *buffer_info;
2777         unsigned int i;
2778         u32 cmd_length = 0;
2779         u16 ipcse = 0, tucse, mss;
2780         u8 ipcss, ipcso, tucss, tucso, hdr_len;
2781         int err;
2782
2783         if (skb_is_gso(skb)) {
2784                 if (skb_header_cloned(skb)) {
2785                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2786                         if (err)
2787                                 return err;
2788                 }
2789
2790                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2791                 mss = skb_shinfo(skb)->gso_size;
2792                 if (skb->protocol == htons(ETH_P_IP)) {
2793                         struct iphdr *iph = ip_hdr(skb);
2794                         iph->tot_len = 0;
2795                         iph->check = 0;
2796                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2797                                                                  iph->daddr, 0,
2798                                                                  IPPROTO_TCP,
2799                                                                  0);
2800                         cmd_length = E1000_TXD_CMD_IP;
2801                         ipcse = skb_transport_offset(skb) - 1;
2802                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2803                         ipv6_hdr(skb)->payload_len = 0;
2804                         tcp_hdr(skb)->check =
2805                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2806                                                  &ipv6_hdr(skb)->daddr,
2807                                                  0, IPPROTO_TCP, 0);
2808                         ipcse = 0;
2809                 }
2810                 ipcss = skb_network_offset(skb);
2811                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2812                 tucss = skb_transport_offset(skb);
2813                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2814                 tucse = 0;
2815
2816                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2817                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2818
2819                 i = tx_ring->next_to_use;
2820                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2821                 buffer_info = &tx_ring->buffer_info[i];
2822
2823                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2824                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2825                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2826                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2827                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2828                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2829                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2830                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2831                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2832
2833                 buffer_info->time_stamp = jiffies;
2834                 buffer_info->next_to_watch = i;
2835
2836                 if (++i == tx_ring->count) i = 0;
2837                 tx_ring->next_to_use = i;
2838
2839                 return true;
2840         }
2841         return false;
2842 }
2843
2844 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2845                           struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2846 {
2847         struct e1000_context_desc *context_desc;
2848         struct e1000_buffer *buffer_info;
2849         unsigned int i;
2850         u8 css;
2851         u32 cmd_len = E1000_TXD_CMD_DEXT;
2852
2853         if (skb->ip_summed != CHECKSUM_PARTIAL)
2854                 return false;
2855
2856         switch (skb->protocol) {
2857         case cpu_to_be16(ETH_P_IP):
2858                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2859                         cmd_len |= E1000_TXD_CMD_TCP;
2860                 break;
2861         case cpu_to_be16(ETH_P_IPV6):
2862                 /* XXX not handling all IPV6 headers */
2863                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2864                         cmd_len |= E1000_TXD_CMD_TCP;
2865                 break;
2866         default:
2867                 if (unlikely(net_ratelimit()))
2868                         DPRINTK(DRV, WARNING,
2869                                 "checksum_partial proto=%x!\n", skb->protocol);
2870                 break;
2871         }
2872
2873         css = skb_transport_offset(skb);
2874
2875         i = tx_ring->next_to_use;
2876         buffer_info = &tx_ring->buffer_info[i];
2877         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2878
2879         context_desc->lower_setup.ip_config = 0;
2880         context_desc->upper_setup.tcp_fields.tucss = css;
2881         context_desc->upper_setup.tcp_fields.tucso =
2882                 css + skb->csum_offset;
2883         context_desc->upper_setup.tcp_fields.tucse = 0;
2884         context_desc->tcp_seg_setup.data = 0;
2885         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2886
2887         buffer_info->time_stamp = jiffies;
2888         buffer_info->next_to_watch = i;
2889
2890         if (unlikely(++i == tx_ring->count)) i = 0;
2891         tx_ring->next_to_use = i;
2892
2893         return true;
2894 }
2895
2896 #define E1000_MAX_TXD_PWR       12
2897 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2898
2899 static int e1000_tx_map(struct e1000_adapter *adapter,
2900                         struct e1000_tx_ring *tx_ring,
2901                         struct sk_buff *skb, unsigned int first,
2902                         unsigned int max_per_txd, unsigned int nr_frags,
2903                         unsigned int mss)
2904 {
2905         struct e1000_hw *hw = &adapter->hw;
2906         unsigned int len = skb_headlen(skb);
2907         unsigned int offset, size, count = 0, i;
2908         unsigned int f;
2909         dma_addr_t map;
2910
2911         i = tx_ring->next_to_use;
2912
2913         if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
2914                 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
2915                 dev_kfree_skb(skb);
2916                 return -2;
2917         }
2918
2919         map = skb_shinfo(skb)->dma_maps[0];
2920         offset = 0;
2921
2922         while (len) {
2923                 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i];
2924                 size = min(len, max_per_txd);
2925                 /* Workaround for Controller erratum --
2926                  * descriptor for non-tso packet in a linear SKB that follows a
2927                  * tso gets written back prematurely before the data is fully
2928                  * DMA'd to the controller */
2929                 if (!skb->data_len && tx_ring->last_tx_tso &&
2930                     !skb_is_gso(skb)) {
2931                         tx_ring->last_tx_tso = 0;
2932                         size -= 4;
2933                 }
2934
2935                 /* Workaround for premature desc write-backs
2936                  * in TSO mode.  Append 4-byte sentinel desc */
2937                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2938                         size -= 4;
2939                 /* work-around for errata 10 and it applies
2940                  * to all controllers in PCI-X mode
2941                  * The fix is to make sure that the first descriptor of a
2942                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2943                  */
2944                 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2945                                 (size > 2015) && count == 0))
2946                         size = 2015;
2947
2948                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2949                  * terminating buffers within evenly-aligned dwords. */
2950                 if (unlikely(adapter->pcix_82544 &&
2951                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2952                    size > 4))
2953                         size -= 4;
2954
2955                 buffer_info->length = size;
2956                 buffer_info->dma = map + offset;
2957                 buffer_info->time_stamp = jiffies;
2958                 buffer_info->next_to_watch = i;
2959
2960                 len -= size;
2961                 offset += size;
2962                 count++;
2963                 if (unlikely(++i == tx_ring->count)) i = 0;
2964         }
2965
2966         for (f = 0; f < nr_frags; f++) {
2967                 struct skb_frag_struct *frag;
2968
2969                 frag = &skb_shinfo(skb)->frags[f];
2970                 len = frag->size;
2971                 map = skb_shinfo(skb)->dma_maps[f + 1];
2972                 offset = 0;
2973
2974                 while (len) {
2975                         struct e1000_buffer *buffer_info;
2976                         buffer_info = &tx_ring->buffer_info[i];
2977                         size = min(len, max_per_txd);
2978                         /* Workaround for premature desc write-backs
2979                          * in TSO mode.  Append 4-byte sentinel desc */
2980                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2981                                 size -= 4;
2982                         /* Workaround for potential 82544 hang in PCI-X.
2983                          * Avoid terminating buffers within evenly-aligned
2984                          * dwords. */
2985                         if (unlikely(adapter->pcix_82544 &&
2986                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2987                            size > 4))
2988                                 size -= 4;
2989
2990                         buffer_info->length = size;
2991                         buffer_info->dma = map + offset;
2992                         buffer_info->time_stamp = jiffies;
2993                         buffer_info->next_to_watch = i;
2994
2995                         len -= size;
2996                         offset += size;
2997                         count++;
2998                         if (unlikely(++i == tx_ring->count)) i = 0;
2999                 }
3000         }
3001
3002         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3003         tx_ring->buffer_info[i].skb = skb;
3004         tx_ring->buffer_info[first].next_to_watch = i;
3005         smp_wmb();
3006
3007         return count;
3008 }
3009
3010 static void e1000_tx_queue(struct e1000_adapter *adapter,
3011                            struct e1000_tx_ring *tx_ring, int tx_flags,
3012                            int count)
3013 {
3014         struct e1000_hw *hw = &adapter->hw;
3015         struct e1000_tx_desc *tx_desc = NULL;
3016         struct e1000_buffer *buffer_info;
3017         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3018         unsigned int i;
3019
3020         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3021                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3022                              E1000_TXD_CMD_TSE;
3023                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3024
3025                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3026                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3027         }
3028
3029         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3030                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3031                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3032         }
3033
3034         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3035                 txd_lower |= E1000_TXD_CMD_VLE;
3036                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3037         }
3038
3039         i = tx_ring->next_to_use;
3040
3041         while (count--) {
3042                 buffer_info = &tx_ring->buffer_info[i];
3043                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3044                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3045                 tx_desc->lower.data =
3046                         cpu_to_le32(txd_lower | buffer_info->length);
3047                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3048                 if (unlikely(++i == tx_ring->count)) i = 0;
3049         }
3050
3051         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3052
3053         /* Force memory writes to complete before letting h/w
3054          * know there are new descriptors to fetch.  (Only
3055          * applicable for weak-ordered memory model archs,
3056          * such as IA-64). */
3057         wmb();
3058
3059         tx_ring->next_to_use = i;
3060         writel(i, hw->hw_addr + tx_ring->tdt);
3061         /* we need this if more than one processor can write to our tail
3062          * at a time, it syncronizes IO on IA64/Altix systems */
3063         mmiowb();
3064 }
3065
3066 /**
3067  * 82547 workaround to avoid controller hang in half-duplex environment.
3068  * The workaround is to avoid queuing a large packet that would span
3069  * the internal Tx FIFO ring boundary by notifying the stack to resend
3070  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3071  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3072  * to the beginning of the Tx FIFO.
3073  **/
3074
3075 #define E1000_FIFO_HDR                  0x10
3076 #define E1000_82547_PAD_LEN             0x3E0
3077
3078 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3079                                        struct sk_buff *skb)
3080 {
3081         u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3082         u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3083
3084         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3085
3086         if (adapter->link_duplex != HALF_DUPLEX)
3087                 goto no_fifo_stall_required;
3088
3089         if (atomic_read(&adapter->tx_fifo_stall))
3090                 return 1;
3091
3092         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3093                 atomic_set(&adapter->tx_fifo_stall, 1);
3094                 return 1;
3095         }
3096
3097 no_fifo_stall_required:
3098         adapter->tx_fifo_head += skb_fifo_len;
3099         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3100                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3101         return 0;
3102 }
3103
3104 #define MINIMUM_DHCP_PACKET_SIZE 282
3105 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3106                                     struct sk_buff *skb)
3107 {
3108         struct e1000_hw *hw =  &adapter->hw;
3109         u16 length, offset;
3110         if (vlan_tx_tag_present(skb)) {
3111                 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3112                         ( hw->mng_cookie.status &
3113                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3114                         return 0;
3115         }
3116         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3117                 struct ethhdr *eth = (struct ethhdr *)skb->data;
3118                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3119                         const struct iphdr *ip =
3120                                 (struct iphdr *)((u8 *)skb->data+14);
3121                         if (IPPROTO_UDP == ip->protocol) {
3122                                 struct udphdr *udp =
3123                                         (struct udphdr *)((u8 *)ip +
3124                                                 (ip->ihl << 2));
3125                                 if (ntohs(udp->dest) == 67) {
3126                                         offset = (u8 *)udp + 8 - skb->data;
3127                                         length = skb->len - offset;
3128
3129                                         return e1000_mng_write_dhcp_info(hw,
3130                                                         (u8 *)udp + 8,
3131                                                         length);
3132                                 }
3133                         }
3134                 }
3135         }
3136         return 0;
3137 }
3138
3139 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3140 {
3141         struct e1000_adapter *adapter = netdev_priv(netdev);
3142         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3143
3144         netif_stop_queue(netdev);
3145         /* Herbert's original patch had:
3146          *  smp_mb__after_netif_stop_queue();
3147          * but since that doesn't exist yet, just open code it. */
3148         smp_mb();
3149
3150         /* We need to check again in a case another CPU has just
3151          * made room available. */
3152         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3153                 return -EBUSY;
3154
3155         /* A reprieve! */
3156         netif_start_queue(netdev);
3157         ++adapter->restart_queue;
3158         return 0;
3159 }
3160
3161 static int e1000_maybe_stop_tx(struct net_device *netdev,
3162                                struct e1000_tx_ring *tx_ring, int size)
3163 {
3164         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3165                 return 0;
3166         return __e1000_maybe_stop_tx(netdev, size);
3167 }
3168
3169 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3170 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3171 {
3172         struct e1000_adapter *adapter = netdev_priv(netdev);
3173         struct e1000_hw *hw = &adapter->hw;
3174         struct e1000_tx_ring *tx_ring;
3175         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3176         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3177         unsigned int tx_flags = 0;
3178         unsigned int len = skb->len - skb->data_len;
3179         unsigned int nr_frags;
3180         unsigned int mss;
3181         int count = 0;
3182         int tso;
3183         unsigned int f;
3184
3185         /* This goes back to the question of how to logically map a tx queue
3186          * to a flow.  Right now, performance is impacted slightly negatively
3187          * if using multiple tx queues.  If the stack breaks away from a
3188          * single qdisc implementation, we can look at this again. */
3189         tx_ring = adapter->tx_ring;
3190
3191         if (unlikely(skb->len <= 0)) {
3192                 dev_kfree_skb_any(skb);
3193                 return NETDEV_TX_OK;
3194         }
3195
3196         /* 82571 and newer doesn't need the workaround that limited descriptor
3197          * length to 4kB */
3198         if (hw->mac_type >= e1000_82571)
3199                 max_per_txd = 8192;
3200
3201         mss = skb_shinfo(skb)->gso_size;
3202         /* The controller does a simple calculation to
3203          * make sure there is enough room in the FIFO before
3204          * initiating the DMA for each buffer.  The calc is:
3205          * 4 = ceil(buffer len/mss).  To make sure we don't
3206          * overrun the FIFO, adjust the max buffer len if mss
3207          * drops. */
3208         if (mss) {
3209                 u8 hdr_len;
3210                 max_per_txd = min(mss << 2, max_per_txd);
3211                 max_txd_pwr = fls(max_per_txd) - 1;
3212
3213                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3214                 * points to just header, pull a few bytes of payload from
3215                 * frags into skb->data */
3216                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3217                 if (skb->data_len && hdr_len == len) {
3218                         switch (hw->mac_type) {
3219                                 unsigned int pull_size;
3220                         case e1000_82544:
3221                                 /* Make sure we have room to chop off 4 bytes,
3222                                  * and that the end alignment will work out to
3223                                  * this hardware's requirements
3224                                  * NOTE: this is a TSO only workaround
3225                                  * if end byte alignment not correct move us
3226                                  * into the next dword */
3227                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3228                                         break;
3229                                 /* fall through */
3230                         case e1000_82571:
3231                         case e1000_82572:
3232                         case e1000_82573:
3233                         case e1000_ich8lan:
3234                                 pull_size = min((unsigned int)4, skb->data_len);
3235                                 if (!__pskb_pull_tail(skb, pull_size)) {
3236                                         DPRINTK(DRV, ERR,
3237                                                 "__pskb_pull_tail failed.\n");
3238                                         dev_kfree_skb_any(skb);
3239                                         return NETDEV_TX_OK;
3240                                 }
3241                                 len = skb->len - skb->data_len;
3242                                 break;
3243                         default:
3244                                 /* do nothing */
3245                                 break;
3246                         }
3247                 }
3248         }
3249
3250         /* reserve a descriptor for the offload context */
3251         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3252                 count++;
3253         count++;
3254
3255         /* Controller Erratum workaround */
3256         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3257                 count++;
3258
3259         count += TXD_USE_COUNT(len, max_txd_pwr);
3260
3261         if (adapter->pcix_82544)
3262                 count++;
3263
3264         /* work-around for errata 10 and it applies to all controllers
3265          * in PCI-X mode, so add one more descriptor to the count
3266          */
3267         if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3268                         (len > 2015)))
3269                 count++;
3270
3271         nr_frags = skb_shinfo(skb)->nr_frags;
3272         for (f = 0; f < nr_frags; f++)
3273                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3274                                        max_txd_pwr);
3275         if (adapter->pcix_82544)
3276                 count += nr_frags;
3277
3278
3279         if (hw->tx_pkt_filtering &&
3280             (hw->mac_type == e1000_82573))
3281                 e1000_transfer_dhcp_info(adapter, skb);
3282
3283         /* need: count + 2 desc gap to keep tail from touching
3284          * head, otherwise try next time */
3285         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3286                 return NETDEV_TX_BUSY;
3287
3288         if (unlikely(hw->mac_type == e1000_82547)) {
3289                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3290                         netif_stop_queue(netdev);
3291                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3292                         return NETDEV_TX_BUSY;
3293                 }
3294         }
3295
3296         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3297                 tx_flags |= E1000_TX_FLAGS_VLAN;
3298                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3299         }
3300
3301         first = tx_ring->next_to_use;
3302
3303         tso = e1000_tso(adapter, tx_ring, skb);
3304         if (tso < 0) {
3305                 dev_kfree_skb_any(skb);
3306                 return NETDEV_TX_OK;
3307         }
3308
3309         if (likely(tso)) {
3310                 tx_ring->last_tx_tso = 1;
3311                 tx_flags |= E1000_TX_FLAGS_TSO;
3312         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3313                 tx_flags |= E1000_TX_FLAGS_CSUM;
3314
3315         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3316          * 82571 hardware supports TSO capabilities for IPv6 as well...
3317          * no longer assume, we must. */
3318         if (likely(skb->protocol == htons(ETH_P_IP)))
3319                 tx_flags |= E1000_TX_FLAGS_IPV4;
3320
3321         e1000_tx_queue(adapter, tx_ring, tx_flags,
3322                        e1000_tx_map(adapter, tx_ring, skb, first,
3323                                     max_per_txd, nr_frags, mss));
3324
3325         netdev->trans_start = jiffies;
3326
3327         /* Make sure there is space in the ring for the next send. */
3328         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3329
3330         return NETDEV_TX_OK;
3331 }
3332
3333 /**
3334  * e1000_tx_timeout - Respond to a Tx Hang
3335  * @netdev: network interface device structure
3336  **/
3337
3338 static void e1000_tx_timeout(struct net_device *netdev)
3339 {
3340         struct e1000_adapter *adapter = netdev_priv(netdev);
3341
3342         /* Do the reset outside of interrupt context */
3343         adapter->tx_timeout_count++;
3344         schedule_work(&adapter->reset_task);
3345 }
3346
3347 static void e1000_reset_task(struct work_struct *work)
3348 {
3349         struct e1000_adapter *adapter =
3350                 container_of(work, struct e1000_adapter, reset_task);
3351
3352         e1000_reinit_locked(adapter);
3353 }
3354
3355 /**
3356  * e1000_get_stats - Get System Network Statistics
3357  * @netdev: network interface device structure
3358  *
3359  * Returns the address of the device statistics structure.
3360  * The statistics are actually updated from the timer callback.
3361  **/
3362
3363 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3364 {
3365         struct e1000_adapter *adapter = netdev_priv(netdev);
3366
3367         /* only return the current stats */
3368         return &adapter->net_stats;
3369 }
3370
3371 /**
3372  * e1000_change_mtu - Change the Maximum Transfer Unit
3373  * @netdev: network interface device structure
3374  * @new_mtu: new value for maximum frame size
3375  *
3376  * Returns 0 on success, negative on failure
3377  **/
3378
3379 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3380 {
3381         struct e1000_adapter *adapter = netdev_priv(netdev);
3382         struct e1000_hw *hw = &adapter->hw;
3383         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3384         u16 eeprom_data = 0;
3385
3386         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3387             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3388                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3389                 return -EINVAL;
3390         }
3391
3392         /* Adapter-specific max frame size limits. */
3393         switch (hw->mac_type) {
3394         case e1000_undefined ... e1000_82542_rev2_1:
3395         case e1000_ich8lan:
3396                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3397                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3398                         return -EINVAL;
3399                 }
3400                 break;
3401         case e1000_82573:
3402                 /* Jumbo Frames not supported if:
3403                  * - this is not an 82573L device
3404                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3405                 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3406                                   &eeprom_data);
3407                 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3408                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3409                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3410                                 DPRINTK(PROBE, ERR,
3411                                         "Jumbo Frames not supported.\n");
3412                                 return -EINVAL;
3413                         }
3414                         break;
3415                 }
3416                 /* ERT will be enabled later to enable wire speed receives */
3417
3418                 /* fall through to get support */
3419         case e1000_82571:
3420         case e1000_82572:
3421         case e1000_80003es2lan:
3422 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3423                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3424                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3425                         return -EINVAL;
3426                 }
3427                 break;
3428         default:
3429                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3430                 break;
3431         }
3432
3433         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3434          * means we reserve 2 more, this pushes us to allocate from the next
3435          * larger slab size
3436          * i.e. RXBUFFER_2048 --> size-4096 slab */
3437
3438         if (max_frame <= E1000_RXBUFFER_256)
3439                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3440         else if (max_frame <= E1000_RXBUFFER_512)
3441                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3442         else if (max_frame <= E1000_RXBUFFER_1024)
3443                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3444         else if (max_frame <= E1000_RXBUFFER_2048)
3445                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3446         else if (max_frame <= E1000_RXBUFFER_4096)
3447                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3448         else if (max_frame <= E1000_RXBUFFER_8192)
3449                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3450         else if (max_frame <= E1000_RXBUFFER_16384)
3451                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3452
3453         /* adjust allocation if LPE protects us, and we aren't using SBP */
3454         if (!hw->tbi_compatibility_on &&
3455             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3456              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3457                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3458
3459         netdev->mtu = new_mtu;
3460         hw->max_frame_size = max_frame;
3461
3462         if (netif_running(netdev))
3463                 e1000_reinit_locked(adapter);
3464
3465         return 0;
3466 }
3467
3468 /**
3469  * e1000_update_stats - Update the board statistics counters
3470  * @adapter: board private structure
3471  **/
3472
3473 void e1000_update_stats(struct e1000_adapter *adapter)
3474 {
3475         struct e1000_hw *hw = &adapter->hw;
3476         struct pci_dev *pdev = adapter->pdev;
3477         unsigned long flags;
3478         u16 phy_tmp;
3479
3480 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3481
3482         /*
3483          * Prevent stats update while adapter is being reset, or if the pci
3484          * connection is down.
3485          */
3486         if (adapter->link_speed == 0)
3487                 return;
3488         if (pci_channel_offline(pdev))
3489                 return;
3490
3491         spin_lock_irqsave(&adapter->stats_lock, flags);
3492
3493         /* these counters are modified from e1000_tbi_adjust_stats,
3494          * called from the interrupt context, so they must only
3495          * be written while holding adapter->stats_lock
3496          */
3497
3498         adapter->stats.crcerrs += er32(CRCERRS);
3499         adapter->stats.gprc += er32(GPRC);
3500         adapter->stats.gorcl += er32(GORCL);
3501         adapter->stats.gorch += er32(GORCH);
3502         adapter->stats.bprc += er32(BPRC);
3503         adapter->stats.mprc += er32(MPRC);
3504         adapter->stats.roc += er32(ROC);
3505
3506         if (hw->mac_type != e1000_ich8lan) {
3507                 adapter->stats.prc64 += er32(PRC64);
3508                 adapter->stats.prc127 += er32(PRC127);
3509                 adapter->stats.prc255 += er32(PRC255);
3510                 adapter->stats.prc511 += er32(PRC511);
3511                 adapter->stats.prc1023 += er32(PRC1023);
3512                 adapter->stats.prc1522 += er32(PRC1522);
3513         }
3514
3515         adapter->stats.symerrs += er32(SYMERRS);
3516         adapter->stats.mpc += er32(MPC);
3517         adapter->stats.scc += er32(SCC);
3518         adapter->stats.ecol += er32(ECOL);
3519         adapter->stats.mcc += er32(MCC);
3520         adapter->stats.latecol += er32(LATECOL);
3521         adapter->stats.dc += er32(DC);
3522         adapter->stats.sec += er32(SEC);
3523         adapter->stats.rlec += er32(RLEC);
3524         adapter->stats.xonrxc += er32(XONRXC);
3525         adapter->stats.xontxc += er32(XONTXC);
3526         adapter->stats.xoffrxc += er32(XOFFRXC);
3527         adapter->stats.xofftxc += er32(XOFFTXC);
3528         adapter->stats.fcruc += er32(FCRUC);
3529         adapter->stats.gptc += er32(GPTC);
3530         adapter->stats.gotcl += er32(GOTCL);
3531         adapter->stats.gotch += er32(GOTCH);
3532         adapter->stats.rnbc += er32(RNBC);
3533         adapter->stats.ruc += er32(RUC);
3534         adapter->stats.rfc += er32(RFC);
3535         adapter->stats.rjc += er32(RJC);
3536         adapter->stats.torl += er32(TORL);
3537         adapter->stats.torh += er32(TORH);
3538         adapter->stats.totl += er32(TOTL);
3539         adapter->stats.toth += er32(TOTH);
3540         adapter->stats.tpr += er32(TPR);
3541
3542         if (hw->mac_type != e1000_ich8lan) {
3543                 adapter->stats.ptc64 += er32(PTC64);
3544                 adapter->stats.ptc127 += er32(PTC127);
3545                 adapter->stats.ptc255 += er32(PTC255);
3546                 adapter->stats.ptc511 += er32(PTC511);
3547                 adapter->stats.ptc1023 += er32(PTC1023);
3548                 adapter->stats.ptc1522 += er32(PTC1522);
3549         }
3550
3551         adapter->stats.mptc += er32(MPTC);
3552         adapter->stats.bptc += er32(BPTC);
3553
3554         /* used for adaptive IFS */
3555
3556         hw->tx_packet_delta = er32(TPT);
3557         adapter->stats.tpt += hw->tx_packet_delta;
3558         hw->collision_delta = er32(COLC);
3559         adapter->stats.colc += hw->collision_delta;
3560
3561         if (hw->mac_type >= e1000_82543) {
3562                 adapter->stats.algnerrc += er32(ALGNERRC);
3563                 adapter->stats.rxerrc += er32(RXERRC);
3564                 adapter->stats.tncrs += er32(TNCRS);
3565                 adapter->stats.cexterr += er32(CEXTERR);
3566                 adapter->stats.tsctc += er32(TSCTC);
3567                 adapter->stats.tsctfc += er32(TSCTFC);
3568         }
3569         if (hw->mac_type > e1000_82547_rev_2) {
3570                 adapter->stats.iac += er32(IAC);
3571                 adapter->stats.icrxoc += er32(ICRXOC);
3572
3573                 if (hw->mac_type != e1000_ich8lan) {
3574                         adapter->stats.icrxptc += er32(ICRXPTC);
3575                         adapter->stats.icrxatc += er32(ICRXATC);
3576                         adapter->stats.ictxptc += er32(ICTXPTC);
3577                         adapter->stats.ictxatc += er32(ICTXATC);
3578                         adapter->stats.ictxqec += er32(ICTXQEC);
3579                         adapter->stats.ictxqmtc += er32(ICTXQMTC);
3580                         adapter->stats.icrxdmtc += er32(ICRXDMTC);
3581                 }
3582         }
3583
3584         /* Fill out the OS statistics structure */
3585         adapter->net_stats.multicast = adapter->stats.mprc;
3586         adapter->net_stats.collisions = adapter->stats.colc;
3587
3588         /* Rx Errors */
3589
3590         /* RLEC on some newer hardware can be incorrect so build
3591         * our own version based on RUC and ROC */
3592         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3593                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3594                 adapter->stats.ruc + adapter->stats.roc +
3595                 adapter->stats.cexterr;
3596         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3597         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3598         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3599         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3600         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3601
3602         /* Tx Errors */
3603         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3604         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3605         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3606         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3607         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3608         if (hw->bad_tx_carr_stats_fd &&
3609             adapter->link_duplex == FULL_DUPLEX) {
3610                 adapter->net_stats.tx_carrier_errors = 0;
3611                 adapter->stats.tncrs = 0;
3612         }
3613
3614         /* Tx Dropped needs to be maintained elsewhere */
3615
3616         /* Phy Stats */
3617         if (hw->media_type == e1000_media_type_copper) {
3618                 if ((adapter->link_speed == SPEED_1000) &&
3619                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3620                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3621                         adapter->phy_stats.idle_errors += phy_tmp;
3622                 }
3623
3624                 if ((hw->mac_type <= e1000_82546) &&
3625                    (hw->phy_type == e1000_phy_m88) &&
3626                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3627                         adapter->phy_stats.receive_errors += phy_tmp;
3628         }
3629
3630         /* Management Stats */
3631         if (hw->has_smbus) {
3632                 adapter->stats.mgptc += er32(MGTPTC);
3633                 adapter->stats.mgprc += er32(MGTPRC);
3634                 adapter->stats.mgpdc += er32(MGTPDC);
3635         }
3636
3637         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3638 }
3639
3640 /**
3641  * e1000_intr_msi - Interrupt Handler
3642  * @irq: interrupt number
3643  * @data: pointer to a network interface device structure
3644  **/
3645
3646 static irqreturn_t e1000_intr_msi(int irq, void *data)
3647 {
3648         struct net_device *netdev = data;
3649         struct e1000_adapter *adapter = netdev_priv(netdev);
3650         struct e1000_hw *hw = &adapter->hw;
3651         u32 icr = er32(ICR);
3652
3653         /* in NAPI mode read ICR disables interrupts using IAM */
3654
3655         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3656                 hw->get_link_status = 1;
3657                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3658                  * link down event; disable receives here in the ISR and reset
3659                  * adapter in watchdog */
3660                 if (netif_carrier_ok(netdev) &&
3661                     (hw->mac_type == e1000_80003es2lan)) {
3662                         /* disable receives */
3663                         u32 rctl = er32(RCTL);
3664                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3665                 }
3666                 /* guard against interrupt when we're going down */
3667                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3668                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3669         }
3670
3671         if (likely(napi_schedule_prep(&adapter->napi))) {
3672                 adapter->total_tx_bytes = 0;
3673                 adapter->total_tx_packets = 0;
3674                 adapter->total_rx_bytes = 0;
3675                 adapter->total_rx_packets = 0;
3676                 __napi_schedule(&adapter->napi);
3677         } else
3678                 e1000_irq_enable(adapter);
3679
3680         return IRQ_HANDLED;
3681 }
3682
3683 /**
3684  * e1000_intr - Interrupt Handler
3685  * @irq: interrupt number
3686  * @data: pointer to a network interface device structure
3687  **/
3688
3689 static irqreturn_t e1000_intr(int irq, void *data)
3690 {
3691         struct net_device *netdev = data;
3692         struct e1000_adapter *adapter = netdev_priv(netdev);
3693         struct e1000_hw *hw = &adapter->hw;
3694         u32 rctl, icr = er32(ICR);
3695
3696         if (unlikely((!icr) || test_bit(__E1000_RESETTING, &adapter->flags)))
3697                 return IRQ_NONE;  /* Not our interrupt */
3698
3699         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3700          * not set, then the adapter didn't send an interrupt */
3701         if (unlikely(hw->mac_type >= e1000_82571 &&
3702                      !(icr & E1000_ICR_INT_ASSERTED)))
3703                 return IRQ_NONE;
3704
3705         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3706          * need for the IMC write */
3707
3708         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3709                 hw->get_link_status = 1;
3710                 /* 80003ES2LAN workaround--
3711                  * For packet buffer work-around on link down event;
3712                  * disable receives here in the ISR and
3713                  * reset adapter in watchdog
3714                  */
3715                 if (netif_carrier_ok(netdev) &&
3716                     (hw->mac_type == e1000_80003es2lan)) {
3717                         /* disable receives */
3718                         rctl = er32(RCTL);
3719                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3720                 }
3721                 /* guard against interrupt when we're going down */
3722                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3723                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3724         }
3725
3726         if (unlikely(hw->mac_type < e1000_82571)) {
3727                 /* disable interrupts, without the synchronize_irq bit */
3728                 ew32(IMC, ~0);
3729                 E1000_WRITE_FLUSH();
3730         }
3731         if (likely(napi_schedule_prep(&adapter->napi))) {
3732                 adapter->total_tx_bytes = 0;
3733                 adapter->total_tx_packets = 0;
3734                 adapter->total_rx_bytes = 0;
3735                 adapter->total_rx_packets = 0;
3736                 __napi_schedule(&adapter->napi);
3737         } else
3738                 /* this really should not happen! if it does it is basically a
3739                  * bug, but not a hard error, so enable ints and continue */
3740                 e1000_irq_enable(adapter);
3741
3742         return IRQ_HANDLED;
3743 }
3744
3745 /**
3746  * e1000_clean - NAPI Rx polling callback
3747  * @adapter: board private structure
3748  **/
3749 static int e1000_clean(struct napi_struct *napi, int budget)
3750 {
3751         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3752         struct net_device *poll_dev = adapter->netdev;
3753         int tx_cleaned = 0, work_done = 0;
3754
3755         adapter = netdev_priv(poll_dev);
3756
3757         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3758
3759         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3760                           &work_done, budget);
3761
3762         if (tx_cleaned)
3763                 work_done = budget;
3764
3765         /* If budget not fully consumed, exit the polling mode */
3766         if (work_done < budget) {
3767                 if (likely(adapter->itr_setting & 3))
3768                         e1000_set_itr(adapter);
3769                 napi_complete(napi);
3770                 e1000_irq_enable(adapter);
3771         }
3772
3773         return work_done;
3774 }
3775
3776 /**
3777  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3778  * @adapter: board private structure
3779  **/
3780 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3781                                struct e1000_tx_ring *tx_ring)
3782 {
3783         struct e1000_hw *hw = &adapter->hw;
3784         struct net_device *netdev = adapter->netdev;
3785         struct e1000_tx_desc *tx_desc, *eop_desc;
3786         struct e1000_buffer *buffer_info;
3787         unsigned int i, eop;
3788         unsigned int count = 0;
3789         bool cleaned = false;
3790         unsigned int total_tx_bytes=0, total_tx_packets=0;
3791
3792         i = tx_ring->next_to_clean;
3793         eop = tx_ring->buffer_info[i].next_to_watch;
3794         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3795
3796         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3797                 for (cleaned = false; !cleaned; ) {
3798                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3799                         buffer_info = &tx_ring->buffer_info[i];
3800                         cleaned = (i == eop);
3801
3802                         if (cleaned) {
3803                                 struct sk_buff *skb = buffer_info->skb;
3804                                 unsigned int segs, bytecount;
3805                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3806                                 /* multiply data chunks by size of headers */
3807                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3808                                             skb->len;
3809                                 total_tx_packets += segs;
3810                                 total_tx_bytes += bytecount;
3811                         }
3812                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3813                         tx_desc->upper.data = 0;
3814
3815                         if (unlikely(++i == tx_ring->count)) i = 0;
3816                 }
3817
3818                 eop = tx_ring->buffer_info[i].next_to_watch;
3819                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3820 #define E1000_TX_WEIGHT 64
3821                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3822                 if (count++ == E1000_TX_WEIGHT)
3823                         break;
3824         }
3825
3826         tx_ring->next_to_clean = i;
3827
3828 #define TX_WAKE_THRESHOLD 32
3829         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3830                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3831                 /* Make sure that anybody stopping the queue after this
3832                  * sees the new next_to_clean.
3833                  */
3834                 smp_mb();
3835                 if (netif_queue_stopped(netdev)) {
3836                         netif_wake_queue(netdev);
3837                         ++adapter->restart_queue;
3838                 }
3839         }
3840
3841         if (adapter->detect_tx_hung) {
3842                 /* Detect a transmit hang in hardware, this serializes the
3843                  * check with the clearing of time_stamp and movement of i */
3844                 adapter->detect_tx_hung = false;
3845                 /*
3846                  * read barrier to make sure that the ->dma member and time
3847                  * stamp are updated fully
3848                  */
3849                 smp_rmb();
3850                 if (tx_ring->buffer_info[eop].dma &&
3851                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3852                                (adapter->tx_timeout_factor * HZ))
3853                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3854
3855                         /* detected Tx unit hang */
3856                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3857                                         "  Tx Queue             <%lu>\n"
3858                                         "  TDH                  <%x>\n"
3859                                         "  TDT                  <%x>\n"
3860                                         "  next_to_use          <%x>\n"
3861                                         "  next_to_clean        <%x>\n"
3862                                         "buffer_info[next_to_clean]\n"
3863                                         "  time_stamp           <%lx>\n"
3864                                         "  next_to_watch        <%x>\n"
3865                                         "  jiffies              <%lx>\n"
3866                                         "  next_to_watch.status <%x>\n",
3867                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3868                                         sizeof(struct e1000_tx_ring)),
3869                                 readl(hw->hw_addr + tx_ring->tdh),
3870                                 readl(hw->hw_addr + tx_ring->tdt),
3871                                 tx_ring->next_to_use,
3872                                 tx_ring->next_to_clean,
3873                                 tx_ring->buffer_info[eop].time_stamp,
3874                                 eop,
3875                                 jiffies,
3876                                 eop_desc->upper.fields.status);
3877                         netif_stop_queue(netdev);
3878                 }
3879         }
3880         adapter->total_tx_bytes += total_tx_bytes;
3881         adapter->total_tx_packets += total_tx_packets;
3882         adapter->net_stats.tx_bytes += total_tx_bytes;
3883         adapter->net_stats.tx_packets += total_tx_packets;
3884         return cleaned;
3885 }
3886
3887 /**
3888  * e1000_rx_checksum - Receive Checksum Offload for 82543
3889  * @adapter:     board private structure
3890  * @status_err:  receive descriptor status and error fields
3891  * @csum:        receive descriptor csum field
3892  * @sk_buff:     socket buffer with received data
3893  **/
3894
3895 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3896                               u32 csum, struct sk_buff *skb)
3897 {
3898         struct e1000_hw *hw = &adapter->hw;
3899         u16 status = (u16)status_err;
3900         u8 errors = (u8)(status_err >> 24);
3901         skb->ip_summed = CHECKSUM_NONE;
3902
3903         /* 82543 or newer only */
3904         if (unlikely(hw->mac_type < e1000_82543)) return;
3905         /* Ignore Checksum bit is set */
3906         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3907         /* TCP/UDP checksum error bit is set */
3908         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3909                 /* let the stack verify checksum errors */
3910                 adapter->hw_csum_err++;
3911                 return;
3912         }
3913         /* TCP/UDP Checksum has not been calculated */
3914         if (hw->mac_type <= e1000_82547_rev_2) {
3915                 if (!(status & E1000_RXD_STAT_TCPCS))
3916                         return;
3917         } else {
3918                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3919                         return;
3920         }
3921         /* It must be a TCP or UDP packet with a valid checksum */
3922         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3923                 /* TCP checksum is good */
3924                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3925         } else if (hw->mac_type > e1000_82547_rev_2) {
3926                 /* IP fragment with UDP payload */
3927                 /* Hardware complements the payload checksum, so we undo it
3928                  * and then put the value in host order for further stack use.
3929                  */
3930                 __sum16 sum = (__force __sum16)htons(csum);
3931                 skb->csum = csum_unfold(~sum);
3932                 skb->ip_summed = CHECKSUM_COMPLETE;
3933         }
3934         adapter->hw_csum_good++;
3935 }
3936
3937 /**
3938  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3939  * @adapter: board private structure
3940  **/
3941 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3942                                struct e1000_rx_ring *rx_ring,
3943                                int *work_done, int work_to_do)
3944 {
3945         struct e1000_hw *hw = &adapter->hw;
3946         struct net_device *netdev = adapter->netdev;
3947         struct pci_dev *pdev = adapter->pdev;
3948         struct e1000_rx_desc *rx_desc, *next_rxd;
3949         struct e1000_buffer *buffer_info, *next_buffer;
3950         unsigned long flags;
3951         u32 length;
3952         u8 last_byte;
3953         unsigned int i;
3954         int cleaned_count = 0;
3955         bool cleaned = false;
3956         unsigned int total_rx_bytes=0, total_rx_packets=0;
3957
3958         i = rx_ring->next_to_clean;
3959         rx_desc = E1000_RX_DESC(*rx_ring, i);
3960         buffer_info = &rx_ring->buffer_info[i];
3961
3962         while (rx_desc->status & E1000_RXD_STAT_DD) {
3963                 struct sk_buff *skb;
3964                 u8 status;
3965
3966                 if (*work_done >= work_to_do)
3967                         break;
3968                 (*work_done)++;
3969
3970                 status = rx_desc->status;
3971                 skb = buffer_info->skb;
3972                 buffer_info->skb = NULL;
3973
3974                 prefetch(skb->data - NET_IP_ALIGN);
3975
3976                 if (++i == rx_ring->count) i = 0;
3977                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3978                 prefetch(next_rxd);
3979
3980                 next_buffer = &rx_ring->buffer_info[i];
3981
3982                 cleaned = true;
3983                 cleaned_count++;
3984                 pci_unmap_single(pdev,
3985                                  buffer_info->dma,
3986                                  buffer_info->length,
3987                                  PCI_DMA_FROMDEVICE);
3988
3989                 length = le16_to_cpu(rx_desc->length);
3990
3991                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3992                         /* All receives must fit into a single buffer */
3993                         E1000_DBG("%s: Receive packet consumed multiple"
3994                                   " buffers\n", netdev->name);
3995                         /* recycle */
3996                         buffer_info->skb = skb;
3997                         goto next_desc;
3998                 }
3999
4000                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4001                         last_byte = *(skb->data + length - 1);
4002                         if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4003                                        last_byte)) {
4004                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4005                                 e1000_tbi_adjust_stats(hw, &adapter->stats,
4006                                                        length, skb->data);
4007                                 spin_unlock_irqrestore(&adapter->stats_lock,
4008                                                        flags);
4009                                 length--;
4010                         } else {
4011                                 /* recycle */
4012                                 buffer_info->skb = skb;
4013                                 goto next_desc;
4014                         }
4015                 }
4016
4017                 /* adjust length to remove Ethernet CRC, this must be
4018                  * done after the TBI_ACCEPT workaround above */
4019                 length -= 4;
4020
4021                 /* probably a little skewed due to removing CRC */
4022                 total_rx_bytes += length;
4023                 total_rx_packets++;
4024
4025                 /* code added for copybreak, this should improve
4026                  * performance for small packets with large amounts
4027                  * of reassembly being done in the stack */
4028                 if (length < copybreak) {
4029                         struct sk_buff *new_skb =
4030                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4031                         if (new_skb) {
4032                                 skb_reserve(new_skb, NET_IP_ALIGN);
4033                                 skb_copy_to_linear_data_offset(new_skb,
4034                                                                -NET_IP_ALIGN,
4035                                                                (skb->data -
4036                                                                 NET_IP_ALIGN),
4037                                                                (length +
4038                                                                 NET_IP_ALIGN));
4039                                 /* save the skb in buffer_info as good */
4040                                 buffer_info->skb = skb;
4041                                 skb = new_skb;
4042                         }
4043                         /* else just continue with the old one */
4044                 }
4045                 /* end copybreak code */
4046                 skb_put(skb, length);
4047
4048                 /* Receive Checksum Offload */
4049                 e1000_rx_checksum(adapter,
4050                                   (u32)(status) |
4051                                   ((u32)(rx_desc->errors) << 24),
4052                                   le16_to_cpu(rx_desc->csum), skb);
4053
4054                 skb->protocol = eth_type_trans(skb, netdev);
4055
4056                 if (unlikely(adapter->vlgrp &&
4057                             (status & E1000_RXD_STAT_VP))) {
4058                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4059                                                  le16_to_cpu(rx_desc->special));
4060                 } else {
4061                         netif_receive_skb(skb);
4062                 }
4063
4064 next_desc:
4065                 rx_desc->status = 0;
4066
4067                 /* return some buffers to hardware, one at a time is too slow */
4068                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4069                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4070                         cleaned_count = 0;
4071                 }
4072
4073                 /* use prefetched values */
4074                 rx_desc = next_rxd;
4075                 buffer_info = next_buffer;
4076         }
4077         rx_ring->next_to_clean = i;
4078
4079         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4080         if (cleaned_count)
4081                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4082
4083         adapter->total_rx_packets += total_rx_packets;
4084         adapter->total_rx_bytes += total_rx_bytes;
4085         adapter->net_stats.rx_bytes += total_rx_bytes;
4086         adapter->net_stats.rx_packets += total_rx_packets;
4087         return cleaned;
4088 }
4089
4090 /**
4091  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4092  * @adapter: address of board private structure
4093  **/
4094
4095 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4096                                    struct e1000_rx_ring *rx_ring,
4097                                    int cleaned_count)
4098 {
4099         struct e1000_hw *hw = &adapter->hw;
4100         struct net_device *netdev = adapter->netdev;
4101         struct pci_dev *pdev = adapter->pdev;
4102         struct e1000_rx_desc *rx_desc;
4103         struct e1000_buffer *buffer_info;
4104         struct sk_buff *skb;
4105         unsigned int i;
4106         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4107
4108         i = rx_ring->next_to_use;
4109         buffer_info = &rx_ring->buffer_info[i];
4110
4111         while (cleaned_count--) {
4112                 skb = buffer_info->skb;
4113                 if (skb) {
4114                         skb_trim(skb, 0);
4115                         goto map_skb;
4116                 }
4117
4118                 skb = netdev_alloc_skb(netdev, bufsz);
4119                 if (unlikely(!skb)) {
4120                         /* Better luck next round */
4121                         adapter->alloc_rx_buff_failed++;
4122                         break;
4123                 }
4124
4125                 /* Fix for errata 23, can't cross 64kB boundary */
4126                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4127                         struct sk_buff *oldskb = skb;
4128                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4129                                              "at %p\n", bufsz, skb->data);
4130                         /* Try again, without freeing the previous */
4131                         skb = netdev_alloc_skb(netdev, bufsz);
4132                         /* Failed allocation, critical failure */
4133                         if (!skb) {
4134                                 dev_kfree_skb(oldskb);
4135                                 break;
4136                         }
4137
4138                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4139                                 /* give up */
4140                                 dev_kfree_skb(skb);
4141                                 dev_kfree_skb(oldskb);
4142                                 break; /* while !buffer_info->skb */
4143                         }
4144
4145                         /* Use new allocation */
4146                         dev_kfree_skb(oldskb);
4147                 }
4148                 /* Make buffer alignment 2 beyond a 16 byte boundary
4149                  * this will result in a 16 byte aligned IP header after
4150                  * the 14 byte MAC header is removed
4151                  */
4152                 skb_reserve(skb, NET_IP_ALIGN);
4153
4154                 buffer_info->skb = skb;
4155                 buffer_info->length = adapter->rx_buffer_len;
4156 map_skb:
4157                 buffer_info->dma = pci_map_single(pdev,
4158                                                   skb->data,
4159                                                   adapter->rx_buffer_len,
4160                                                   PCI_DMA_FROMDEVICE);
4161
4162                 /* Fix for errata 23, can't cross 64kB boundary */
4163                 if (!e1000_check_64k_bound(adapter,
4164                                         (void *)(unsigned long)buffer_info->dma,
4165                                         adapter->rx_buffer_len)) {
4166                         DPRINTK(RX_ERR, ERR,
4167                                 "dma align check failed: %u bytes at %p\n",
4168                                 adapter->rx_buffer_len,
4169                                 (void *)(unsigned long)buffer_info->dma);
4170                         dev_kfree_skb(skb);
4171                         buffer_info->skb = NULL;
4172
4173                         pci_unmap_single(pdev, buffer_info->dma,
4174                                          adapter->rx_buffer_len,
4175                                          PCI_DMA_FROMDEVICE);
4176
4177                         break; /* while !buffer_info->skb */
4178                 }
4179                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4180                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4181
4182                 if (unlikely(++i == rx_ring->count))
4183                         i = 0;
4184                 buffer_info = &rx_ring->buffer_info[i];
4185         }
4186
4187         if (likely(rx_ring->next_to_use != i)) {
4188                 rx_ring->next_to_use = i;
4189                 if (unlikely(i-- == 0))
4190                         i = (rx_ring->count - 1);
4191
4192                 /* Force memory writes to complete before letting h/w
4193                  * know there are new descriptors to fetch.  (Only
4194                  * applicable for weak-ordered memory model archs,
4195                  * such as IA-64). */
4196                 wmb();
4197                 writel(i, hw->hw_addr + rx_ring->rdt);
4198         }
4199 }
4200
4201 /**
4202  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4203  * @adapter:
4204  **/
4205
4206 static void e1000_smartspeed(struct e1000_adapter *adapter)
4207 {
4208         struct e1000_hw *hw = &adapter->hw;
4209         u16 phy_status;
4210         u16 phy_ctrl;
4211
4212         if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4213            !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4214                 return;
4215
4216         if (adapter->smartspeed == 0) {
4217                 /* If Master/Slave config fault is asserted twice,
4218                  * we assume back-to-back */
4219                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4220                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4221                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4222                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4223                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4224                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4225                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4226                         e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4227                                             phy_ctrl);
4228                         adapter->smartspeed++;
4229                         if (!e1000_phy_setup_autoneg(hw) &&
4230                            !e1000_read_phy_reg(hw, PHY_CTRL,
4231                                                &phy_ctrl)) {
4232                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4233                                              MII_CR_RESTART_AUTO_NEG);
4234                                 e1000_write_phy_reg(hw, PHY_CTRL,
4235                                                     phy_ctrl);
4236                         }
4237                 }
4238                 return;
4239         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4240                 /* If still no link, perhaps using 2/3 pair cable */
4241                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4242                 phy_ctrl |= CR_1000T_MS_ENABLE;
4243                 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4244                 if (!e1000_phy_setup_autoneg(hw) &&
4245                    !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4246                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4247                                      MII_CR_RESTART_AUTO_NEG);
4248                         e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4249                 }
4250         }
4251         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4252         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4253                 adapter->smartspeed = 0;
4254 }
4255
4256 /**
4257  * e1000_ioctl -
4258  * @netdev:
4259  * @ifreq:
4260  * @cmd:
4261  **/
4262
4263 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4264 {
4265         switch (cmd) {
4266         case SIOCGMIIPHY:
4267         case SIOCGMIIREG:
4268         case SIOCSMIIREG:
4269                 return e1000_mii_ioctl(netdev, ifr, cmd);
4270         default:
4271                 return -EOPNOTSUPP;
4272         }
4273 }
4274
4275 /**
4276  * e1000_mii_ioctl -
4277  * @netdev:
4278  * @ifreq:
4279  * @cmd:
4280  **/
4281
4282 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4283                            int cmd)
4284 {
4285         struct e1000_adapter *adapter = netdev_priv(netdev);
4286         struct e1000_hw *hw = &adapter->hw;
4287         struct mii_ioctl_data *data = if_mii(ifr);
4288         int retval;
4289         u16 mii_reg;
4290         u16 spddplx;
4291         unsigned long flags;
4292
4293         if (hw->media_type != e1000_media_type_copper)
4294                 return -EOPNOTSUPP;
4295
4296         switch (cmd) {
4297         case SIOCGMIIPHY:
4298                 data->phy_id = hw->phy_addr;
4299                 break;
4300         case SIOCGMIIREG:
4301                 if (!capable(CAP_NET_ADMIN))
4302                         return -EPERM;
4303                 spin_lock_irqsave(&adapter->stats_lock, flags);
4304                 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4305                                    &data->val_out)) {
4306                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4307                         return -EIO;
4308                 }
4309                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4310                 break;
4311         case SIOCSMIIREG:
4312                 if (!capable(CAP_NET_ADMIN))
4313                         return -EPERM;
4314                 if (data->reg_num & ~(0x1F))
4315                         return -EFAULT;
4316                 mii_reg = data->val_in;
4317                 spin_lock_irqsave(&adapter->stats_lock, flags);
4318                 if (e1000_write_phy_reg(hw, data->reg_num,
4319                                         mii_reg)) {
4320                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4321                         return -EIO;
4322                 }
4323                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4324                 if (hw->media_type == e1000_media_type_copper) {
4325                         switch (data->reg_num) {
4326                         case PHY_CTRL:
4327                                 if (mii_reg & MII_CR_POWER_DOWN)
4328                                         break;
4329                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4330                                         hw->autoneg = 1;
4331                                         hw->autoneg_advertised = 0x2F;
4332                                 } else {
4333                                         if (mii_reg & 0x40)
4334                                                 spddplx = SPEED_1000;
4335                                         else if (mii_reg & 0x2000)
4336                                                 spddplx = SPEED_100;
4337                                         else
4338                                                 spddplx = SPEED_10;
4339                                         spddplx += (mii_reg & 0x100)
4340                                                    ? DUPLEX_FULL :
4341                                                    DUPLEX_HALF;
4342                                         retval = e1000_set_spd_dplx(adapter,
4343                                                                     spddplx);
4344                                         if (retval)
4345                                                 return retval;
4346                                 }
4347                                 if (netif_running(adapter->netdev))
4348                                         e1000_reinit_locked(adapter);
4349                                 else
4350                                         e1000_reset(adapter);
4351                                 break;
4352                         case M88E1000_PHY_SPEC_CTRL:
4353                         case M88E1000_EXT_PHY_SPEC_CTRL:
4354                                 if (e1000_phy_reset(hw))
4355                                         return -EIO;
4356                                 break;
4357                         }
4358                 } else {
4359                         switch (data->reg_num) {
4360                         case PHY_CTRL:
4361                                 if (mii_reg & MII_CR_POWER_DOWN)
4362                                         break;
4363                                 if (netif_running(adapter->netdev))
4364                                         e1000_reinit_locked(adapter);
4365                                 else
4366                                         e1000_reset(adapter);
4367                                 break;
4368                         }
4369                 }
4370                 break;
4371         default:
4372                 return -EOPNOTSUPP;
4373         }
4374         return E1000_SUCCESS;
4375 }
4376
4377 void e1000_pci_set_mwi(struct e1000_hw *hw)
4378 {
4379         struct e1000_adapter *adapter = hw->back;
4380         int ret_val = pci_set_mwi(adapter->pdev);
4381
4382         if (ret_val)
4383                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4384 }
4385
4386 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4387 {
4388         struct e1000_adapter *adapter = hw->back;
4389
4390         pci_clear_mwi(adapter->pdev);
4391 }
4392
4393 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4394 {
4395         struct e1000_adapter *adapter = hw->back;
4396         return pcix_get_mmrbc(adapter->pdev);
4397 }
4398
4399 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4400 {
4401         struct e1000_adapter *adapter = hw->back;
4402         pcix_set_mmrbc(adapter->pdev, mmrbc);
4403 }
4404
4405 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4406 {
4407     struct e1000_adapter *adapter = hw->back;
4408     u16 cap_offset;
4409
4410     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4411     if (!cap_offset)
4412         return -E1000_ERR_CONFIG;
4413
4414     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4415
4416     return E1000_SUCCESS;
4417 }
4418
4419 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4420 {
4421         outl(value, port);
4422 }
4423
4424 static void e1000_vlan_rx_register(struct net_device *netdev,
4425                                    struct vlan_group *grp)
4426 {
4427         struct e1000_adapter *adapter = netdev_priv(netdev);
4428         struct e1000_hw *hw = &adapter->hw;
4429         u32 ctrl, rctl;
4430
4431         if (!test_bit(__E1000_DOWN, &adapter->flags))
4432                 e1000_irq_disable(adapter);
4433         adapter->vlgrp = grp;
4434
4435         if (grp) {
4436                 /* enable VLAN tag insert/strip */
4437                 ctrl = er32(CTRL);
4438                 ctrl |= E1000_CTRL_VME;
4439                 ew32(CTRL, ctrl);
4440
4441                 if (adapter->hw.mac_type != e1000_ich8lan) {
4442                         /* enable VLAN receive filtering */
4443                         rctl = er32(RCTL);
4444                         rctl &= ~E1000_RCTL_CFIEN;
4445                         ew32(RCTL, rctl);
4446                         e1000_update_mng_vlan(adapter);
4447                 }
4448         } else {
4449                 /* disable VLAN tag insert/strip */
4450                 ctrl = er32(CTRL);
4451                 ctrl &= ~E1000_CTRL_VME;
4452                 ew32(CTRL, ctrl);
4453
4454                 if (adapter->hw.mac_type != e1000_ich8lan) {
4455                         if (adapter->mng_vlan_id !=
4456                             (u16)E1000_MNG_VLAN_NONE) {
4457                                 e1000_vlan_rx_kill_vid(netdev,
4458                                                        adapter->mng_vlan_id);
4459                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4460                         }
4461                 }
4462         }
4463
4464         if (!test_bit(__E1000_DOWN, &adapter->flags))
4465                 e1000_irq_enable(adapter);
4466 }
4467
4468 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4469 {
4470         struct e1000_adapter *adapter = netdev_priv(netdev);
4471         struct e1000_hw *hw = &adapter->hw;
4472         u32 vfta, index;
4473
4474         if ((hw->mng_cookie.status &
4475              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4476             (vid == adapter->mng_vlan_id))
4477                 return;
4478         /* add VID to filter table */
4479         index = (vid >> 5) & 0x7F;
4480         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4481         vfta |= (1 << (vid & 0x1F));
4482         e1000_write_vfta(hw, index, vfta);
4483 }
4484
4485 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4486 {
4487         struct e1000_adapter *adapter = netdev_priv(netdev);
4488         struct e1000_hw *hw = &adapter->hw;
4489         u32 vfta, index;
4490
4491         if (!test_bit(__E1000_DOWN, &adapter->flags))
4492                 e1000_irq_disable(adapter);
4493         vlan_group_set_device(adapter->vlgrp, vid, NULL);
4494         if (!test_bit(__E1000_DOWN, &adapter->flags))
4495                 e1000_irq_enable(adapter);
4496
4497         if ((hw->mng_cookie.status &
4498              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4499             (vid == adapter->mng_vlan_id)) {
4500                 /* release control to f/w */
4501                 e1000_release_hw_control(adapter);
4502                 return;
4503         }
4504
4505         /* remove VID from filter table */
4506         index = (vid >> 5) & 0x7F;
4507         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4508         vfta &= ~(1 << (vid & 0x1F));
4509         e1000_write_vfta(hw, index, vfta);
4510 }
4511
4512 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4513 {
4514         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4515
4516         if (adapter->vlgrp) {
4517                 u16 vid;
4518                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4519                         if (!vlan_group_get_device(adapter->vlgrp, vid))
4520                                 continue;
4521                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4522                 }
4523         }
4524 }
4525
4526 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4527 {
4528         struct e1000_hw *hw = &adapter->hw;
4529
4530         hw->autoneg = 0;
4531
4532         /* Fiber NICs only allow 1000 gbps Full duplex */
4533         if ((hw->media_type == e1000_media_type_fiber) &&
4534                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4535                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4536                 return -EINVAL;
4537         }
4538
4539         switch (spddplx) {
4540         case SPEED_10 + DUPLEX_HALF:
4541                 hw->forced_speed_duplex = e1000_10_half;
4542                 break;
4543         case SPEED_10 + DUPLEX_FULL:
4544                 hw->forced_speed_duplex = e1000_10_full;
4545                 break;
4546         case SPEED_100 + DUPLEX_HALF:
4547                 hw->forced_speed_duplex = e1000_100_half;
4548                 break;
4549         case SPEED_100 + DUPLEX_FULL:
4550                 hw->forced_speed_duplex = e1000_100_full;
4551                 break;
4552         case SPEED_1000 + DUPLEX_FULL:
4553                 hw->autoneg = 1;
4554                 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4555                 break;
4556         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4557         default:
4558                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4559                 return -EINVAL;
4560         }
4561         return 0;
4562 }
4563
4564 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4565 {
4566         struct net_device *netdev = pci_get_drvdata(pdev);
4567         struct e1000_adapter *adapter = netdev_priv(netdev);
4568         struct e1000_hw *hw = &adapter->hw;
4569         u32 ctrl, ctrl_ext, rctl, status;
4570         u32 wufc = adapter->wol;
4571 #ifdef CONFIG_PM
4572         int retval = 0;
4573 #endif
4574
4575         netif_device_detach(netdev);
4576
4577         if (netif_running(netdev)) {
4578                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4579                 e1000_down(adapter);
4580         }
4581
4582 #ifdef CONFIG_PM
4583         retval = pci_save_state(pdev);
4584         if (retval)
4585                 return retval;
4586 #endif
4587
4588         status = er32(STATUS);
4589         if (status & E1000_STATUS_LU)
4590                 wufc &= ~E1000_WUFC_LNKC;
4591
4592         if (wufc) {
4593                 e1000_setup_rctl(adapter);
4594                 e1000_set_rx_mode(netdev);
4595
4596                 /* turn on all-multi mode if wake on multicast is enabled */
4597                 if (wufc & E1000_WUFC_MC) {
4598                         rctl = er32(RCTL);
4599                         rctl |= E1000_RCTL_MPE;
4600                         ew32(RCTL, rctl);
4601                 }
4602
4603                 if (hw->mac_type >= e1000_82540) {
4604                         ctrl = er32(CTRL);
4605                         /* advertise wake from D3Cold */
4606                         #define E1000_CTRL_ADVD3WUC 0x00100000
4607                         /* phy power management enable */
4608                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4609                         ctrl |= E1000_CTRL_ADVD3WUC |
4610                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4611                         ew32(CTRL, ctrl);
4612                 }
4613
4614                 if (hw->media_type == e1000_media_type_fiber ||
4615                    hw->media_type == e1000_media_type_internal_serdes) {
4616                         /* keep the laser running in D3 */
4617                         ctrl_ext = er32(CTRL_EXT);
4618                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4619                         ew32(CTRL_EXT, ctrl_ext);
4620                 }
4621
4622                 /* Allow time for pending master requests to run */
4623                 e1000_disable_pciex_master(hw);
4624
4625                 ew32(WUC, E1000_WUC_PME_EN);
4626                 ew32(WUFC, wufc);
4627                 pci_enable_wake(pdev, PCI_D3hot, 1);
4628                 pci_enable_wake(pdev, PCI_D3cold, 1);
4629         } else {
4630                 ew32(WUC, 0);
4631                 ew32(WUFC, 0);
4632                 pci_enable_wake(pdev, PCI_D3hot, 0);
4633                 pci_enable_wake(pdev, PCI_D3cold, 0);
4634         }
4635
4636         e1000_release_manageability(adapter);
4637
4638         /* make sure adapter isn't asleep if manageability is enabled */
4639         if (adapter->en_mng_pt) {
4640                 pci_enable_wake(pdev, PCI_D3hot, 1);
4641                 pci_enable_wake(pdev, PCI_D3cold, 1);
4642         }
4643
4644         if (hw->phy_type == e1000_phy_igp_3)
4645                 e1000_phy_powerdown_workaround(hw);
4646
4647         if (netif_running(netdev))
4648                 e1000_free_irq(adapter);
4649
4650         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4651          * would have already happened in close and is redundant. */
4652         e1000_release_hw_control(adapter);
4653
4654         pci_disable_device(pdev);
4655
4656         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4657
4658         return 0;
4659 }
4660
4661 #ifdef CONFIG_PM
4662 static int e1000_resume(struct pci_dev *pdev)
4663 {
4664         struct net_device *netdev = pci_get_drvdata(pdev);
4665         struct e1000_adapter *adapter = netdev_priv(netdev);
4666         struct e1000_hw *hw = &adapter->hw;
4667         u32 err;
4668
4669         pci_set_power_state(pdev, PCI_D0);
4670         pci_restore_state(pdev);
4671
4672         if (adapter->need_ioport)
4673                 err = pci_enable_device(pdev);
4674         else
4675                 err = pci_enable_device_mem(pdev);
4676         if (err) {
4677                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4678                 return err;
4679         }
4680         pci_set_master(pdev);
4681
4682         pci_enable_wake(pdev, PCI_D3hot, 0);
4683         pci_enable_wake(pdev, PCI_D3cold, 0);
4684
4685         if (netif_running(netdev)) {
4686                 err = e1000_request_irq(adapter);
4687                 if (err)
4688                         return err;
4689         }
4690
4691         e1000_power_up_phy(adapter);
4692         e1000_reset(adapter);
4693         ew32(WUS, ~0);
4694
4695         e1000_init_manageability(adapter);
4696
4697         if (netif_running(netdev))
4698                 e1000_up(adapter);
4699
4700         netif_device_attach(netdev);
4701
4702         /* If the controller is 82573 and f/w is AMT, do not set
4703          * DRV_LOAD until the interface is up.  For all other cases,
4704          * let the f/w know that the h/w is now under the control
4705          * of the driver. */
4706         if (hw->mac_type != e1000_82573 ||
4707             !e1000_check_mng_mode(hw))
4708                 e1000_get_hw_control(adapter);
4709
4710         return 0;
4711 }
4712 #endif
4713
4714 static void e1000_shutdown(struct pci_dev *pdev)
4715 {
4716         e1000_suspend(pdev, PMSG_SUSPEND);
4717 }
4718
4719 #ifdef CONFIG_NET_POLL_CONTROLLER
4720 /*
4721  * Polling 'interrupt' - used by things like netconsole to send skbs
4722  * without having to re-enable interrupts. It's not called while
4723  * the interrupt routine is executing.
4724  */
4725 static void e1000_netpoll(struct net_device *netdev)
4726 {
4727         struct e1000_adapter *adapter = netdev_priv(netdev);
4728
4729         disable_irq(adapter->pdev->irq);
4730         e1000_intr(adapter->pdev->irq, netdev);
4731         enable_irq(adapter->pdev->irq);
4732 }
4733 #endif
4734
4735 /**
4736  * e1000_io_error_detected - called when PCI error is detected
4737  * @pdev: Pointer to PCI device
4738  * @state: The current pci conneection state
4739  *
4740  * This function is called after a PCI bus error affecting
4741  * this device has been detected.
4742  */
4743 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4744                                                 pci_channel_state_t state)
4745 {
4746         struct net_device *netdev = pci_get_drvdata(pdev);
4747         struct e1000_adapter *adapter = netdev_priv(netdev);
4748
4749         netif_device_detach(netdev);
4750
4751         if (netif_running(netdev))
4752                 e1000_down(adapter);
4753         pci_disable_device(pdev);
4754
4755         /* Request a slot slot reset. */
4756         return PCI_ERS_RESULT_NEED_RESET;
4757 }
4758
4759 /**
4760  * e1000_io_slot_reset - called after the pci bus has been reset.
4761  * @pdev: Pointer to PCI device
4762  *
4763  * Restart the card from scratch, as if from a cold-boot. Implementation
4764  * resembles the first-half of the e1000_resume routine.
4765  */
4766 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4767 {
4768         struct net_device *netdev = pci_get_drvdata(pdev);
4769         struct e1000_adapter *adapter = netdev_priv(netdev);
4770         struct e1000_hw *hw = &adapter->hw;
4771         int err;
4772
4773         if (adapter->need_ioport)
4774                 err = pci_enable_device(pdev);
4775         else
4776                 err = pci_enable_device_mem(pdev);
4777         if (err) {
4778                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4779                 return PCI_ERS_RESULT_DISCONNECT;
4780         }
4781         pci_set_master(pdev);
4782
4783         pci_enable_wake(pdev, PCI_D3hot, 0);
4784         pci_enable_wake(pdev, PCI_D3cold, 0);
4785
4786         e1000_reset(adapter);
4787         ew32(WUS, ~0);
4788
4789         return PCI_ERS_RESULT_RECOVERED;
4790 }
4791
4792 /**
4793  * e1000_io_resume - called when traffic can start flowing again.
4794  * @pdev: Pointer to PCI device
4795  *
4796  * This callback is called when the error recovery driver tells us that
4797  * its OK to resume normal operation. Implementation resembles the
4798  * second-half of the e1000_resume routine.
4799  */
4800 static void e1000_io_resume(struct pci_dev *pdev)
4801 {
4802         struct net_device *netdev = pci_get_drvdata(pdev);
4803         struct e1000_adapter *adapter = netdev_priv(netdev);
4804         struct e1000_hw *hw = &adapter->hw;
4805
4806         e1000_init_manageability(adapter);
4807
4808         if (netif_running(netdev)) {
4809                 if (e1000_up(adapter)) {
4810                         printk("e1000: can't bring device back up after reset\n");
4811                         return;
4812                 }
4813         }
4814
4815         netif_device_attach(netdev);
4816
4817         /* If the controller is 82573 and f/w is AMT, do not set
4818          * DRV_LOAD until the interface is up.  For all other cases,
4819          * let the f/w know that the h/w is now under the control
4820          * of the driver. */
4821         if (hw->mac_type != e1000_82573 ||
4822             !e1000_check_mng_mode(hw))
4823                 e1000_get_hw_control(adapter);
4824
4825 }
4826
4827 /* e1000_main.c */