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 e1000_hw *hw = &adapter->hw;
 581         struct net_device *netdev = adapter->netdev;
 582         u32 rctl, tctl;
 583
 584         /* signal that we're down so the interrupt handler does not
 585          * reschedule our watchdog timer */
 586         set_bit(__E1000_DOWN, &adapter->flags);
 587
 588         /* disable receives in the hardware */
 589         rctl = er32(RCTL);
 590         ew32(RCTL, rctl & ~E1000_RCTL_EN);
 591         /* flush and sleep below */
 592
 593         /* can be netif_tx_disable when NETIF_F_LLTX is removed */
 594         netif_stop_queue(netdev);
 595
 596         /* disable transmits in the hardware */
 597         tctl = er32(TCTL);
 598         tctl &= ~E1000_TCTL_EN;
 599         ew32(TCTL, tctl);
 600         /* flush both disables and wait for them to finish */
 601         E1000_WRITE_FLUSH();
 602         msleep(10);
 603
 604         napi_disable(&adapter->napi);
 605
 606         e1000_irq_disable(adapter);
 607
 608         del_timer_sync(&adapter->tx_fifo_stall_timer);
 609         del_timer_sync(&adapter->watchdog_timer);
 610         del_timer_sync(&adapter->phy_info_timer);
 611
 612         netdev->tx_queue_len = adapter->tx_queue_len;
 613         adapter->link_speed = 0;
 614         adapter->link_duplex = 0;
 615         netif_carrier_off(netdev);
 616
 617         e1000_reset(adapter);
 618         e1000_clean_all_tx_rings(adapter);
 619         e1000_clean_all_rx_rings(adapter);
 620 }
 621
 622 void e1000_reinit_locked(struct e1000_adapter *adapter)
 623 {
 624         WARN_ON(in_interrupt());
 625         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 626                 msleep(1);
 627         e1000_down(adapter);
 628         e1000_up(adapter);
 629         clear_bit(__E1000_RESETTING, &adapter->flags);
 630 }
 631
 632 void e1000_reset(struct e1000_adapter *adapter)
 633 {
 634         struct e1000_hw *hw = &adapter->hw;
 635         u32 pba = 0, tx_space, min_tx_space, min_rx_space;
 636         u16 fc_high_water_mark = E1000_FC_HIGH_DIFF;
 637         bool legacy_pba_adjust = false;
 638
 639         /* Repartition Pba for greater than 9k mtu
 640          * To take effect CTRL.RST is required.
 641          */
 642
 643         switch (hw->mac_type) {
 644         case e1000_82542_rev2_0:
 645         case e1000_82542_rev2_1:
 646         case e1000_82543:
 647         case e1000_82544:
 648         case e1000_82540:
 649         case e1000_82541:
 650         case e1000_82541_rev_2:
 651                 legacy_pba_adjust = true;
 652                 pba = E1000_PBA_48K;
 653                 break;
 654         case e1000_82545:
 655         case e1000_82545_rev_3:
 656         case e1000_82546:
 657         case e1000_82546_rev_3:
 658                 pba = E1000_PBA_48K;
 659                 break;
 660         case e1000_82547:
 661         case e1000_82547_rev_2:
 662                 legacy_pba_adjust = true;
 663                 pba = E1000_PBA_30K;
 664                 break;
 665         case e1000_82571:
 666         case e1000_82572:
 667         case e1000_80003es2lan:
 668                 pba = E1000_PBA_38K;
 669                 break;
 670         case e1000_82573:
 671                 pba = E1000_PBA_20K;
 672                 break;
 673         case e1000_ich8lan:
 674                 pba = E1000_PBA_8K;
 675         case e1000_undefined:
 676         case e1000_num_macs:
 677                 break;
 678         }
 679
 680         if (legacy_pba_adjust) {
 681                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 682                         pba -= 8; /* allocate more FIFO for Tx */
 683
 684                 if (hw->mac_type == e1000_82547) {
 685                         adapter->tx_fifo_head = 0;
 686                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 687                         adapter->tx_fifo_size =
 688                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 689                         atomic_set(&adapter->tx_fifo_stall, 0);
 690                 }
 691         } else if (hw->max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 692                 /* adjust PBA for jumbo frames */
 693                 ew32(PBA, pba);
 694
 695                 /* To maintain wire speed transmits, the Tx FIFO should be
 696                  * large enough to accomodate two full transmit packets,
 697                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 698                  * the Rx FIFO should be large enough to accomodate at least
 699                  * one full receive packet and is similarly rounded up and
 700                  * expressed in KB. */
 701                 pba = er32(PBA);
 702                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 703                 tx_space = pba >> 16;
 704                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 705                 pba &= 0xffff;
 706                 /* don't include ethernet FCS because hardware appends/strips */
 707                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 708                                VLAN_TAG_SIZE;
 709                 min_tx_space = min_rx_space;
 710                 min_tx_space *= 2;
 711                 min_tx_space = ALIGN(min_tx_space, 1024);
 712                 min_tx_space >>= 10;
 713                 min_rx_space = ALIGN(min_rx_space, 1024);
 714                 min_rx_space >>= 10;
 715
 716                 /* If current Tx allocation is less than the min Tx FIFO size,
 717                  * and the min Tx FIFO size is less than the current Rx FIFO
 718                  * allocation, take space away from current Rx allocation */
 719                 if (tx_space < min_tx_space &&
 720                     ((min_tx_space - tx_space) < pba)) {
 721                         pba = pba - (min_tx_space - tx_space);
 722
 723                         /* PCI/PCIx hardware has PBA alignment constraints */
 724                         switch (hw->mac_type) {
 725                         case e1000_82545 ... e1000_82546_rev_3:
 726                                 pba &= ~(E1000_PBA_8K - 1);
 727                                 break;
 728                         default:
 729                                 break;
 730                         }
 731
 732                         /* if short on rx space, rx wins and must trump tx
 733                          * adjustment or use Early Receive if available */
 734                         if (pba < min_rx_space) {
 735                                 switch (hw->mac_type) {
 736                                 case e1000_82573:
 737                                         /* ERT enabled in e1000_configure_rx */
 738                                         break;
 739                                 default:
 740                                         pba = min_rx_space;
 741                                         break;
 742                                 }
 743                         }
 744                 }
 745         }
 746
 747         ew32(PBA, pba);
 748
 749         /* flow control settings */
 750         /* Set the FC high water mark to 90% of the FIFO size.
 751          * Required to clear last 3 LSB */
 752         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 753         /* We can't use 90% on small FIFOs because the remainder
 754          * would be less than 1 full frame.  In this case, we size
 755          * it to allow at least a full frame above the high water
 756          *  mark. */
 757         if (pba < E1000_PBA_16K)
 758                 fc_high_water_mark = (pba * 1024) - 1600;
 759
 760         hw->fc_high_water = fc_high_water_mark;
 761         hw->fc_low_water = fc_high_water_mark - 8;
 762         if (hw->mac_type == e1000_80003es2lan)
 763                 hw->fc_pause_time = 0xFFFF;
 764         else
 765                 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
 766         hw->fc_send_xon = 1;
 767         hw->fc = hw->original_fc;
 768
 769         /* Allow time for pending master requests to run */
 770         e1000_reset_hw(hw);
 771         if (hw->mac_type >= e1000_82544)
 772                 ew32(WUC, 0);
 773
 774         if (e1000_init_hw(hw))
 775                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 776         e1000_update_mng_vlan(adapter);
 777
 778         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 779         if (hw->mac_type >= e1000_82544 &&
 780             hw->mac_type <= e1000_82547_rev_2 &&
 781             hw->autoneg == 1 &&
 782             hw->autoneg_advertised == ADVERTISE_1000_FULL) {
 783                 u32 ctrl = er32(CTRL);
 784                 /* clear phy power management bit if we are in gig only mode,
 785                  * which if enabled will attempt negotiation to 100Mb, which
 786                  * can cause a loss of link at power off or driver unload */
 787                 ctrl &= ~E1000_CTRL_SWDPIN3;
 788                 ew32(CTRL, ctrl);
 789         }
 790
 791         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 792         ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
 793
 794         e1000_reset_adaptive(hw);
 795         e1000_phy_get_info(hw, &adapter->phy_info);
 796
 797         if (!adapter->smart_power_down &&
 798             (hw->mac_type == e1000_82571 ||
 799              hw->mac_type == e1000_82572)) {
 800                 u16 phy_data = 0;
 801                 /* speed up time to link by disabling smart power down, ignore
 802                  * the return value of this function because there is nothing
 803                  * different we would do if it failed */
 804                 e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 805                                    &phy_data);
 806                 phy_data &= ~IGP02E1000_PM_SPD;
 807                 e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
 808                                     phy_data);
 809         }
 810
 811         e1000_release_manageability(adapter);
 812 }
 813
 814 /**
 815  *  Dump the eeprom for users having checksum issues
 816  **/
 817 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
 818 {
 819         struct net_device *netdev = adapter->netdev;
 820         struct ethtool_eeprom eeprom;
 821         const struct ethtool_ops *ops = netdev->ethtool_ops;
 822         u8 *data;
 823         int i;
 824         u16 csum_old, csum_new = 0;
 825
 826         eeprom.len = ops->get_eeprom_len(netdev);
 827         eeprom.offset = 0;
 828
 829         data = kmalloc(eeprom.len, GFP_KERNEL);
 830         if (!data) {
 831                 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
 832                        " data\n");
 833                 return;
 834         }
 835
 836         ops->get_eeprom(netdev, &eeprom, data);
 837
 838         csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
 839                    (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
 840         for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
 841                 csum_new += data[i] + (data[i + 1] << 8);
 842         csum_new = EEPROM_SUM - csum_new;
 843
 844         printk(KERN_ERR "/*********************/\n");
 845         printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
 846         printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
 847
 848         printk(KERN_ERR "Offset    Values\n");
 849         printk(KERN_ERR "========  ======\n");
 850         print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
 851
 852         printk(KERN_ERR "Include this output when contacting your support "
 853                "provider.\n");
 854         printk(KERN_ERR "This is not a software error! Something bad "
 855                "happened to your hardware or\n");
 856         printk(KERN_ERR "EEPROM image. Ignoring this "
 857                "problem could result in further problems,\n");
 858         printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
 859         printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
 860                "which is invalid\n");
 861         printk(KERN_ERR "and requires you to set the proper MAC "
 862                "address manually before continuing\n");
 863         printk(KERN_ERR "to enable this network device.\n");
 864         printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
 865                "to your hardware vendor\n");
 866         printk(KERN_ERR "or Intel Customer Support.\n");
 867         printk(KERN_ERR "/*********************/\n");
 868
 869         kfree(data);
 870 }
 871
 872 /**
 873  * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
 874  * @pdev: PCI device information struct
 875  *
 876  * Return true if an adapter needs ioport resources
 877  **/
 878 static int e1000_is_need_ioport(struct pci_dev *pdev)
 879 {
 880         switch (pdev->device) {
 881         case E1000_DEV_ID_82540EM:
 882         case E1000_DEV_ID_82540EM_LOM:
 883         case E1000_DEV_ID_82540EP:
 884         case E1000_DEV_ID_82540EP_LOM:
 885         case E1000_DEV_ID_82540EP_LP:
 886         case E1000_DEV_ID_82541EI:
 887         case E1000_DEV_ID_82541EI_MOBILE:
 888         case E1000_DEV_ID_82541ER:
 889         case E1000_DEV_ID_82541ER_LOM:
 890         case E1000_DEV_ID_82541GI:
 891         case E1000_DEV_ID_82541GI_LF:
 892         case E1000_DEV_ID_82541GI_MOBILE:
 893         case E1000_DEV_ID_82544EI_COPPER:
 894         case E1000_DEV_ID_82544EI_FIBER:
 895         case E1000_DEV_ID_82544GC_COPPER:
 896         case E1000_DEV_ID_82544GC_LOM:
 897         case E1000_DEV_ID_82545EM_COPPER:
 898         case E1000_DEV_ID_82545EM_FIBER:
 899         case E1000_DEV_ID_82546EB_COPPER:
 900         case E1000_DEV_ID_82546EB_FIBER:
 901         case E1000_DEV_ID_82546EB_QUAD_COPPER:
 902                 return true;
 903         default:
 904                 return false;
 905         }
 906 }
 907
 908 static const struct net_device_ops e1000_netdev_ops = {
 909         .ndo_open               = e1000_open,
 910         .ndo_stop               = e1000_close,
 911         .ndo_start_xmit         = e1000_xmit_frame,
 912         .ndo_get_stats          = e1000_get_stats,
 913         .ndo_set_rx_mode        = e1000_set_rx_mode,
 914         .ndo_set_mac_address    = e1000_set_mac,
 915         .ndo_tx_timeout         = e1000_tx_timeout,
 916         .ndo_change_mtu         = e1000_change_mtu,
 917         .ndo_do_ioctl           = e1000_ioctl,
 918         .ndo_validate_addr      = eth_validate_addr,
 919
 920         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
 921         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
 922         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
 923 #ifdef CONFIG_NET_POLL_CONTROLLER
 924         .ndo_poll_controller    = e1000_netpoll,
 925 #endif
 926 };
 927
 928 /**
 929  * e1000_probe - Device Initialization Routine
 930  * @pdev: PCI device information struct
 931  * @ent: entry in e1000_pci_tbl
 932  *
 933  * Returns 0 on success, negative on failure
 934  *
 935  * e1000_probe initializes an adapter identified by a pci_dev structure.
 936  * The OS initialization, configuring of the adapter private structure,
 937  * and a hardware reset occur.
 938  **/
 939 static int __devinit e1000_probe(struct pci_dev *pdev,
 940                                  const struct pci_device_id *ent)
 941 {
 942         struct net_device *netdev;
 943         struct e1000_adapter *adapter;
 944         struct e1000_hw *hw;
 945
 946         static int cards_found = 0;
 947         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 948         int i, err, pci_using_dac;
 949         u16 eeprom_data = 0;
 950         u16 eeprom_apme_mask = E1000_EEPROM_APME;
 951         int bars, need_ioport;
 952
 953         /* do not allocate ioport bars when not needed */
 954         need_ioport = e1000_is_need_ioport(pdev);
 955         if (need_ioport) {
 956                 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
 957                 err = pci_enable_device(pdev);
 958         } else {
 959                 bars = pci_select_bars(pdev, IORESOURCE_MEM);
 960                 err = pci_enable_device_mem(pdev);
 961         }
 962         if (err)
 963                 return err;
 964
 965         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
 966             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
 967                 pci_using_dac = 1;
 968         } else {
 969                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 970                 if (err) {
 971                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 972                         if (err) {
 973                                 E1000_ERR("No usable DMA configuration, "
 974                                           "aborting\n");
 975                                 goto err_dma;
 976                         }
 977                 }
 978                 pci_using_dac = 0;
 979         }
 980
 981         err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
 982         if (err)
 983                 goto err_pci_reg;
 984
 985         pci_set_master(pdev);
 986
 987         err = -ENOMEM;
 988         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 989         if (!netdev)
 990                 goto err_alloc_etherdev;
 991
 992         SET_NETDEV_DEV(netdev, &pdev->dev);
 993
 994         pci_set_drvdata(pdev, netdev);
 995         adapter = netdev_priv(netdev);
 996         adapter->netdev = netdev;
 997         adapter->pdev = pdev;
 998         adapter->msg_enable = (1 << debug) - 1;
 999         adapter->bars = bars;
1000         adapter->need_ioport = need_ioport;
1001
1002         hw = &adapter->hw;
1003         hw->back = adapter;
1004
1005         err = -EIO;
1006         hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
1007         if (!hw->hw_addr)
1008                 goto err_ioremap;
1009
1010         if (adapter->need_ioport) {
1011                 for (i = BAR_1; i <= BAR_5; i++) {
1012                         if (pci_resource_len(pdev, i) == 0)
1013                                 continue;
1014                         if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1015                                 hw->io_base = pci_resource_start(pdev, i);
1016                                 break;
1017                         }
1018                 }
1019         }
1020
1021         netdev->netdev_ops = &e1000_netdev_ops;
1022         e1000_set_ethtool_ops(netdev);
1023         netdev->watchdog_timeo = 5 * HZ;
1024         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1025
1026         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1027
1028         adapter->bd_number = cards_found;
1029
1030         /* setup the private structure */
1031
1032         err = e1000_sw_init(adapter);
1033         if (err)
1034                 goto err_sw_init;
1035
1036         err = -EIO;
1037         /* Flash BAR mapping must happen after e1000_sw_init
1038          * because it depends on mac_type */
1039         if ((hw->mac_type == e1000_ich8lan) &&
1040            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1041                 hw->flash_address = pci_ioremap_bar(pdev, 1);
1042                 if (!hw->flash_address)
1043                         goto err_flashmap;
1044         }
1045
1046         if (e1000_check_phy_reset_block(hw))
1047                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1048
1049         if (hw->mac_type >= e1000_82543) {
1050                 netdev->features = NETIF_F_SG |
1051                                    NETIF_F_HW_CSUM |
1052                                    NETIF_F_HW_VLAN_TX |
1053                                    NETIF_F_HW_VLAN_RX |
1054                                    NETIF_F_HW_VLAN_FILTER;
1055                 if (hw->mac_type == e1000_ich8lan)
1056                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1057         }
1058
1059         if ((hw->mac_type >= e1000_82544) &&
1060            (hw->mac_type != e1000_82547))
1061                 netdev->features |= NETIF_F_TSO;
1062
1063         if (hw->mac_type > e1000_82547_rev_2)
1064                 netdev->features |= NETIF_F_TSO6;
1065         if (pci_using_dac)
1066                 netdev->features |= NETIF_F_HIGHDMA;
1067
1068         netdev->vlan_features |= NETIF_F_TSO;
1069         netdev->vlan_features |= NETIF_F_TSO6;
1070         netdev->vlan_features |= NETIF_F_HW_CSUM;
1071         netdev->vlan_features |= NETIF_F_SG;
1072
1073         adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1074
1075         /* initialize eeprom parameters */
1076         if (e1000_init_eeprom_params(hw)) {
1077                 E1000_ERR("EEPROM initialization failed\n");
1078                 goto err_eeprom;
1079         }
1080
1081         /* before reading the EEPROM, reset the controller to
1082          * put the device in a known good starting state */
1083
1084         e1000_reset_hw(hw);
1085
1086         /* make sure the EEPROM is good */
1087         if (e1000_validate_eeprom_checksum(hw) < 0) {
1088                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1089                 e1000_dump_eeprom(adapter);
1090                 /*
1091                  * set MAC address to all zeroes to invalidate and temporary
1092                  * disable this device for the user. This blocks regular
1093                  * traffic while still permitting ethtool ioctls from reaching
1094                  * the hardware as well as allowing the user to run the
1095                  * interface after manually setting a hw addr using
1096                  * `ip set address`
1097                  */
1098                 memset(hw->mac_addr, 0, netdev->addr_len);
1099         } else {
1100                 /* copy the MAC address out of the EEPROM */
1101                 if (e1000_read_mac_addr(hw))
1102                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1103         }
1104         /* don't block initalization here due to bad MAC address */
1105         memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1106         memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1107
1108         if (!is_valid_ether_addr(netdev->perm_addr))
1109                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1110
1111         e1000_get_bus_info(hw);
1112
1113         init_timer(&adapter->tx_fifo_stall_timer);
1114         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1115         adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1116
1117         init_timer(&adapter->watchdog_timer);
1118         adapter->watchdog_timer.function = &e1000_watchdog;
1119         adapter->watchdog_timer.data = (unsigned long) adapter;
1120
1121         init_timer(&adapter->phy_info_timer);
1122         adapter->phy_info_timer.function = &e1000_update_phy_info;
1123         adapter->phy_info_timer.data = (unsigned long)adapter;
1124
1125         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1126
1127         e1000_check_options(adapter);
1128
1129         /* Initial Wake on LAN setting
1130          * If APM wake is enabled in the EEPROM,
1131          * enable the ACPI Magic Packet filter
1132          */
1133
1134         switch (hw->mac_type) {
1135         case e1000_82542_rev2_0:
1136         case e1000_82542_rev2_1:
1137         case e1000_82543:
1138                 break;
1139         case e1000_82544:
1140                 e1000_read_eeprom(hw,
1141                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1142                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1143                 break;
1144         case e1000_ich8lan:
1145                 e1000_read_eeprom(hw,
1146                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1147                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1148                 break;
1149         case e1000_82546:
1150         case e1000_82546_rev_3:
1151         case e1000_82571:
1152         case e1000_80003es2lan:
1153                 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1154                         e1000_read_eeprom(hw,
1155                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1156                         break;
1157                 }
1158                 /* Fall Through */
1159         default:
1160                 e1000_read_eeprom(hw,
1161                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1162                 break;
1163         }
1164         if (eeprom_data & eeprom_apme_mask)
1165                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1166
1167         /* now that we have the eeprom settings, apply the special cases
1168          * where the eeprom may be wrong or the board simply won't support
1169          * wake on lan on a particular port */
1170         switch (pdev->device) {
1171         case E1000_DEV_ID_82546GB_PCIE:
1172                 adapter->eeprom_wol = 0;
1173                 break;
1174         case E1000_DEV_ID_82546EB_FIBER:
1175         case E1000_DEV_ID_82546GB_FIBER:
1176         case E1000_DEV_ID_82571EB_FIBER:
1177                 /* Wake events only supported on port A for dual fiber
1178                  * regardless of eeprom setting */
1179                 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1180                         adapter->eeprom_wol = 0;
1181                 break;
1182         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1183         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1184         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1185         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1186         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1187                 /* if quad port adapter, disable WoL on all but port A */
1188                 if (global_quad_port_a != 0)
1189                         adapter->eeprom_wol = 0;
1190                 else
1191                         adapter->quad_port_a = 1;
1192                 /* Reset for multiple quad port adapters */
1193                 if (++global_quad_port_a == 4)
1194                         global_quad_port_a = 0;
1195                 break;
1196         }
1197
1198         /* initialize the wol settings based on the eeprom settings */
1199         adapter->wol = adapter->eeprom_wol;
1200         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1201
1202         /* print bus type/speed/width info */
1203         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1204                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1205                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1206                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1207                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1208                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1209                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1210                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1211                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1212                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1213                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1214                  "32-bit"));
1215
1216         printk("%pM\n", netdev->dev_addr);
1217
1218         if (hw->bus_type == e1000_bus_type_pci_express) {
1219                 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1220                         "longer be supported by this driver in the future.\n",
1221                         pdev->vendor, pdev->device);
1222                 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1223                         "driver instead.\n");
1224         }
1225
1226         /* reset the hardware with the new settings */
1227         e1000_reset(adapter);
1228
1229         /* If the controller is 82573 and f/w is AMT, do not set
1230          * DRV_LOAD until the interface is up.  For all other cases,
1231          * let the f/w know that the h/w is now under the control
1232          * of the driver. */
1233         if (hw->mac_type != e1000_82573 ||
1234             !e1000_check_mng_mode(hw))
1235                 e1000_get_hw_control(adapter);
1236
1237         /* tell the stack to leave us alone until e1000_open() is called */
1238         netif_carrier_off(netdev);
1239         netif_stop_queue(netdev);
1240
1241         strcpy(netdev->name, "eth%d");
1242         err = register_netdev(netdev);
1243         if (err)
1244                 goto err_register;
1245
1246         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1247
1248         cards_found++;
1249         return 0;
1250
1251 err_register:
1252         e1000_release_hw_control(adapter);
1253 err_eeprom:
1254         if (!e1000_check_phy_reset_block(hw))
1255                 e1000_phy_hw_reset(hw);
1256
1257         if (hw->flash_address)
1258                 iounmap(hw->flash_address);
1259 err_flashmap:
1260         kfree(adapter->tx_ring);
1261         kfree(adapter->rx_ring);
1262 err_sw_init:
1263         iounmap(hw->hw_addr);
1264 err_ioremap:
1265         free_netdev(netdev);
1266 err_alloc_etherdev:
1267         pci_release_selected_regions(pdev, bars);
1268 err_pci_reg:
1269 err_dma:
1270         pci_disable_device(pdev);
1271         return err;
1272 }
1273
1274 /**
1275  * e1000_remove - Device Removal Routine
1276  * @pdev: PCI device information struct
1277  *
1278  * e1000_remove is called by the PCI subsystem to alert the driver
1279  * that it should release a PCI device.  The could be caused by a
1280  * Hot-Plug event, or because the driver is going to be removed from
1281  * memory.
1282  **/
1283
1284 static void __devexit e1000_remove(struct pci_dev *pdev)
1285 {
1286         struct net_device *netdev = pci_get_drvdata(pdev);
1287         struct e1000_adapter *adapter = netdev_priv(netdev);
1288         struct e1000_hw *hw = &adapter->hw;
1289
1290         cancel_work_sync(&adapter->reset_task);
1291
1292         e1000_release_manageability(adapter);
1293
1294         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1295          * would have already happened in close and is redundant. */
1296         e1000_release_hw_control(adapter);
1297
1298         unregister_netdev(netdev);
1299
1300         if (!e1000_check_phy_reset_block(hw))
1301                 e1000_phy_hw_reset(hw);
1302
1303         kfree(adapter->tx_ring);
1304         kfree(adapter->rx_ring);
1305
1306         iounmap(hw->hw_addr);
1307         if (hw->flash_address)
1308                 iounmap(hw->flash_address);
1309         pci_release_selected_regions(pdev, adapter->bars);
1310
1311         free_netdev(netdev);
1312
1313         pci_disable_device(pdev);
1314 }
1315
1316 /**
1317  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1318  * @adapter: board private structure to initialize
1319  *
1320  * e1000_sw_init initializes the Adapter private data structure.
1321  * Fields are initialized based on PCI device information and
1322  * OS network device settings (MTU size).
1323  **/
1324
1325 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1326 {
1327         struct e1000_hw *hw = &adapter->hw;
1328         struct net_device *netdev = adapter->netdev;
1329         struct pci_dev *pdev = adapter->pdev;
1330
1331         /* PCI config space info */
1332
1333         hw->vendor_id = pdev->vendor;
1334         hw->device_id = pdev->device;
1335         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1336         hw->subsystem_id = pdev->subsystem_device;
1337         hw->revision_id = pdev->revision;
1338
1339         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1340
1341         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1342         hw->max_frame_size = netdev->mtu +
1343                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1344         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1345
1346         /* identify the MAC */
1347
1348         if (e1000_set_mac_type(hw)) {
1349                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1350                 return -EIO;
1351         }
1352
1353         switch (hw->mac_type) {
1354         default:
1355                 break;
1356         case e1000_82541:
1357         case e1000_82547:
1358         case e1000_82541_rev_2:
1359         case e1000_82547_rev_2:
1360                 hw->phy_init_script = 1;
1361                 break;
1362         }
1363
1364         e1000_set_media_type(hw);
1365
1366         hw->wait_autoneg_complete = false;
1367         hw->tbi_compatibility_en = true;
1368         hw->adaptive_ifs = true;
1369
1370         /* Copper options */
1371
1372         if (hw->media_type == e1000_media_type_copper) {
1373                 hw->mdix = AUTO_ALL_MODES;
1374                 hw->disable_polarity_correction = false;
1375                 hw->master_slave = E1000_MASTER_SLAVE;
1376         }
1377
1378         adapter->num_tx_queues = 1;
1379         adapter->num_rx_queues = 1;
1380
1381         if (e1000_alloc_queues(adapter)) {
1382                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1383                 return -ENOMEM;
1384         }
1385
1386         /* Explicitly disable IRQ since the NIC can be in any state. */
1387         e1000_irq_disable(adapter);
1388
1389         spin_lock_init(&adapter->stats_lock);
1390
1391         set_bit(__E1000_DOWN, &adapter->flags);
1392
1393         return 0;
1394 }
1395
1396 /**
1397  * e1000_alloc_queues - Allocate memory for all rings
1398  * @adapter: board private structure to initialize
1399  *
1400  * We allocate one ring per queue at run-time since we don't know the
1401  * number of queues at compile-time.
1402  **/
1403
1404 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1405 {
1406         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1407                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1408         if (!adapter->tx_ring)
1409                 return -ENOMEM;
1410
1411         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1412                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1413         if (!adapter->rx_ring) {
1414                 kfree(adapter->tx_ring);
1415                 return -ENOMEM;
1416         }
1417
1418         return E1000_SUCCESS;
1419 }
1420
1421 /**
1422  * e1000_open - Called when a network interface is made active
1423  * @netdev: network interface device structure
1424  *
1425  * Returns 0 on success, negative value on failure
1426  *
1427  * The open entry point is called when a network interface is made
1428  * active by the system (IFF_UP).  At this point all resources needed
1429  * for transmit and receive operations are allocated, the interrupt
1430  * handler is registered with the OS, the watchdog timer is started,
1431  * and the stack is notified that the interface is ready.
1432  **/
1433
1434 static int e1000_open(struct net_device *netdev)
1435 {
1436         struct e1000_adapter *adapter = netdev_priv(netdev);
1437         struct e1000_hw *hw = &adapter->hw;
1438         int err;
1439
1440         /* disallow open during test */
1441         if (test_bit(__E1000_TESTING, &adapter->flags))
1442                 return -EBUSY;
1443
1444         /* allocate transmit descriptors */
1445         err = e1000_setup_all_tx_resources(adapter);
1446         if (err)
1447                 goto err_setup_tx;
1448
1449         /* allocate receive descriptors */
1450         err = e1000_setup_all_rx_resources(adapter);
1451         if (err)
1452                 goto err_setup_rx;
1453
1454         e1000_power_up_phy(adapter);
1455
1456         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1457         if ((hw->mng_cookie.status &
1458                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1459                 e1000_update_mng_vlan(adapter);
1460         }
1461
1462         /* If AMT is enabled, let the firmware know that the network
1463          * interface is now open */
1464         if (hw->mac_type == e1000_82573 &&
1465             e1000_check_mng_mode(hw))
1466                 e1000_get_hw_control(adapter);
1467
1468         /* before we allocate an interrupt, we must be ready to handle it.
1469          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1470          * as soon as we call pci_request_irq, so we have to setup our
1471          * clean_rx handler before we do so.  */
1472         e1000_configure(adapter);
1473
1474         err = e1000_request_irq(adapter);
1475         if (err)
1476                 goto err_req_irq;
1477
1478         /* From here on the code is the same as e1000_up() */
1479         clear_bit(__E1000_DOWN, &adapter->flags);
1480
1481         napi_enable(&adapter->napi);
1482
1483         e1000_irq_enable(adapter);
1484
1485         netif_start_queue(netdev);
1486
1487         /* fire a link status change interrupt to start the watchdog */
1488         ew32(ICS, E1000_ICS_LSC);
1489
1490         return E1000_SUCCESS;
1491
1492 err_req_irq:
1493         e1000_release_hw_control(adapter);
1494         e1000_power_down_phy(adapter);
1495         e1000_free_all_rx_resources(adapter);
1496 err_setup_rx:
1497         e1000_free_all_tx_resources(adapter);
1498 err_setup_tx:
1499         e1000_reset(adapter);
1500
1501         return err;
1502 }
1503
1504 /**
1505  * e1000_close - Disables a network interface
1506  * @netdev: network interface device structure
1507  *
1508  * Returns 0, this is not allowed to fail
1509  *
1510  * The close entry point is called when an interface is de-activated
1511  * by the OS.  The hardware is still under the drivers control, but
1512  * needs to be disabled.  A global MAC reset is issued to stop the
1513  * hardware, and all transmit and receive resources are freed.
1514  **/
1515
1516 static int e1000_close(struct net_device *netdev)
1517 {
1518         struct e1000_adapter *adapter = netdev_priv(netdev);
1519         struct e1000_hw *hw = &adapter->hw;
1520
1521         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1522         e1000_down(adapter);
1523         e1000_power_down_phy(adapter);
1524         e1000_free_irq(adapter);
1525
1526         e1000_free_all_tx_resources(adapter);
1527         e1000_free_all_rx_resources(adapter);
1528
1529         /* kill manageability vlan ID if supported, but not if a vlan with
1530          * the same ID is registered on the host OS (let 8021q kill it) */
1531         if ((hw->mng_cookie.status &
1532                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1533              !(adapter->vlgrp &&
1534                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1535                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1536         }
1537
1538         /* If AMT is enabled, let the firmware know that the network
1539          * interface is now closed */
1540         if (hw->mac_type == e1000_82573 &&
1541             e1000_check_mng_mode(hw))
1542                 e1000_release_hw_control(adapter);
1543
1544         return 0;
1545 }
1546
1547 /**
1548  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1549  * @adapter: address of board private structure
1550  * @start: address of beginning of memory
1551  * @len: length of memory
1552  **/
1553 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1554                                   unsigned long len)
1555 {
1556         struct e1000_hw *hw = &adapter->hw;
1557         unsigned long begin = (unsigned long)start;
1558         unsigned long end = begin + len;
1559
1560         /* First rev 82545 and 82546 need to not allow any memory
1561          * write location to cross 64k boundary due to errata 23 */
1562         if (hw->mac_type == e1000_82545 ||
1563             hw->mac_type == e1000_82546) {
1564                 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1565         }
1566
1567         return true;
1568 }
1569
1570 /**
1571  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1572  * @adapter: board private structure
1573  * @txdr:    tx descriptor ring (for a specific queue) to setup
1574  *
1575  * Return 0 on success, negative on failure
1576  **/
1577
1578 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1579                                     struct e1000_tx_ring *txdr)
1580 {
1581         struct pci_dev *pdev = adapter->pdev;
1582         int size;
1583
1584         size = sizeof(struct e1000_buffer) * txdr->count;
1585         txdr->buffer_info = vmalloc(size);
1586         if (!txdr->buffer_info) {
1587                 DPRINTK(PROBE, ERR,
1588                 "Unable to allocate memory for the transmit descriptor ring\n");
1589                 return -ENOMEM;
1590         }
1591         memset(txdr->buffer_info, 0, size);
1592
1593         /* round up to nearest 4K */
1594
1595         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1596         txdr->size = ALIGN(txdr->size, 4096);
1597
1598         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1599         if (!txdr->desc) {
1600 setup_tx_desc_die:
1601                 vfree(txdr->buffer_info);
1602                 DPRINTK(PROBE, ERR,
1603                 "Unable to allocate memory for the transmit descriptor ring\n");
1604                 return -ENOMEM;
1605         }
1606
1607         /* Fix for errata 23, can't cross 64kB boundary */
1608         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1609                 void *olddesc = txdr->desc;
1610                 dma_addr_t olddma = txdr->dma;
1611                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1612                                      "at %p\n", txdr->size, txdr->desc);
1613                 /* Try again, without freeing the previous */
1614                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1615                 /* Failed allocation, critical failure */
1616                 if (!txdr->desc) {
1617                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1618                         goto setup_tx_desc_die;
1619                 }
1620
1621                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1622                         /* give up */
1623                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1624                                             txdr->dma);
1625                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1626                         DPRINTK(PROBE, ERR,
1627                                 "Unable to allocate aligned memory "
1628                                 "for the transmit descriptor ring\n");
1629                         vfree(txdr->buffer_info);
1630                         return -ENOMEM;
1631                 } else {
1632                         /* Free old allocation, new allocation was successful */
1633                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1634                 }
1635         }
1636         memset(txdr->desc, 0, txdr->size);
1637
1638         txdr->next_to_use = 0;
1639         txdr->next_to_clean = 0;
1640
1641         return 0;
1642 }
1643
1644 /**
1645  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1646  *                                (Descriptors) for all queues
1647  * @adapter: board private structure
1648  *
1649  * Return 0 on success, negative on failure
1650  **/
1651
1652 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1653 {
1654         int i, err = 0;
1655
1656         for (i = 0; i < adapter->num_tx_queues; i++) {
1657                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1658                 if (err) {
1659                         DPRINTK(PROBE, ERR,
1660                                 "Allocation for Tx Queue %u failed\n", i);
1661                         for (i-- ; i >= 0; i--)
1662                                 e1000_free_tx_resources(adapter,
1663                                                         &adapter->tx_ring[i]);
1664                         break;
1665                 }
1666         }
1667
1668         return err;
1669 }
1670
1671 /**
1672  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1673  * @adapter: board private structure
1674  *
1675  * Configure the Tx unit of the MAC after a reset.
1676  **/
1677
1678 static void e1000_configure_tx(struct e1000_adapter *adapter)
1679 {
1680         u64 tdba;
1681         struct e1000_hw *hw = &adapter->hw;
1682         u32 tdlen, tctl, tipg, tarc;
1683         u32 ipgr1, ipgr2;
1684
1685         /* Setup the HW Tx Head and Tail descriptor pointers */
1686
1687         switch (adapter->num_tx_queues) {
1688         case 1:
1689         default:
1690                 tdba = adapter->tx_ring[0].dma;
1691                 tdlen = adapter->tx_ring[0].count *
1692                         sizeof(struct e1000_tx_desc);
1693                 ew32(TDLEN, tdlen);
1694                 ew32(TDBAH, (tdba >> 32));
1695                 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1696                 ew32(TDT, 0);
1697                 ew32(TDH, 0);
1698                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1699                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1700                 break;
1701         }
1702
1703         /* Set the default values for the Tx Inter Packet Gap timer */
1704         if (hw->mac_type <= e1000_82547_rev_2 &&
1705             (hw->media_type == e1000_media_type_fiber ||
1706              hw->media_type == e1000_media_type_internal_serdes))
1707                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1708         else
1709                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1710
1711         switch (hw->mac_type) {
1712         case e1000_82542_rev2_0:
1713         case e1000_82542_rev2_1:
1714                 tipg = DEFAULT_82542_TIPG_IPGT;
1715                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1716                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1717                 break;
1718         case e1000_80003es2lan:
1719                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1720                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1721                 break;
1722         default:
1723                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1724                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1725                 break;
1726         }
1727         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1728         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1729         ew32(TIPG, tipg);
1730
1731         /* Set the Tx Interrupt Delay register */
1732
1733         ew32(TIDV, adapter->tx_int_delay);
1734         if (hw->mac_type >= e1000_82540)
1735                 ew32(TADV, adapter->tx_abs_int_delay);
1736
1737         /* Program the Transmit Control Register */
1738
1739         tctl = er32(TCTL);
1740         tctl &= ~E1000_TCTL_CT;
1741         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1742                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1743
1744         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1745                 tarc = er32(TARC0);
1746                 /* set the speed mode bit, we'll clear it if we're not at
1747                  * gigabit link later */
1748                 tarc |= (1 << 21);
1749                 ew32(TARC0, tarc);
1750         } else if (hw->mac_type == e1000_80003es2lan) {
1751                 tarc = er32(TARC0);
1752                 tarc |= 1;
1753                 ew32(TARC0, tarc);
1754                 tarc = er32(TARC1);
1755                 tarc |= 1;
1756                 ew32(TARC1, tarc);
1757         }
1758
1759         e1000_config_collision_dist(hw);
1760
1761         /* Setup Transmit Descriptor Settings for eop descriptor */
1762         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1763
1764         /* only set IDE if we are delaying interrupts using the timers */
1765         if (adapter->tx_int_delay)
1766                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1767
1768         if (hw->mac_type < e1000_82543)
1769                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1770         else
1771                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1772
1773         /* Cache if we're 82544 running in PCI-X because we'll
1774          * need this to apply a workaround later in the send path. */
1775         if (hw->mac_type == e1000_82544 &&
1776             hw->bus_type == e1000_bus_type_pcix)
1777                 adapter->pcix_82544 = 1;
1778
1779         ew32(TCTL, tctl);
1780
1781 }
1782
1783 /**
1784  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1785  * @adapter: board private structure
1786  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1787  *
1788  * Returns 0 on success, negative on failure
1789  **/
1790
1791 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1792                                     struct e1000_rx_ring *rxdr)
1793 {
1794         struct e1000_hw *hw = &adapter->hw;
1795         struct pci_dev *pdev = adapter->pdev;
1796         int size, desc_len;
1797
1798         size = sizeof(struct e1000_buffer) * rxdr->count;
1799         rxdr->buffer_info = vmalloc(size);
1800         if (!rxdr->buffer_info) {
1801                 DPRINTK(PROBE, ERR,
1802                 "Unable to allocate memory for the receive descriptor ring\n");
1803                 return -ENOMEM;
1804         }
1805         memset(rxdr->buffer_info, 0, size);
1806
1807         if (hw->mac_type <= e1000_82547_rev_2)
1808                 desc_len = sizeof(struct e1000_rx_desc);
1809         else
1810                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1811
1812         /* Round up to nearest 4K */
1813
1814         rxdr->size = rxdr->count * desc_len;
1815         rxdr->size = ALIGN(rxdr->size, 4096);
1816
1817         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1818
1819         if (!rxdr->desc) {
1820                 DPRINTK(PROBE, ERR,
1821                 "Unable to allocate memory for the receive descriptor ring\n");
1822 setup_rx_desc_die:
1823                 vfree(rxdr->buffer_info);
1824                 return -ENOMEM;
1825         }
1826
1827         /* Fix for errata 23, can't cross 64kB boundary */
1828         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1829                 void *olddesc = rxdr->desc;
1830                 dma_addr_t olddma = rxdr->dma;
1831                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1832                                      "at %p\n", rxdr->size, rxdr->desc);
1833                 /* Try again, without freeing the previous */
1834                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1835                 /* Failed allocation, critical failure */
1836                 if (!rxdr->desc) {
1837                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1838                         DPRINTK(PROBE, ERR,
1839                                 "Unable to allocate memory "
1840                                 "for the receive descriptor ring\n");
1841                         goto setup_rx_desc_die;
1842                 }
1843
1844                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1845                         /* give up */
1846                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1847                                             rxdr->dma);
1848                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1849                         DPRINTK(PROBE, ERR,
1850                                 "Unable to allocate aligned memory "
1851                                 "for the receive descriptor ring\n");
1852                         goto setup_rx_desc_die;
1853                 } else {
1854                         /* Free old allocation, new allocation was successful */
1855                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1856                 }
1857         }
1858         memset(rxdr->desc, 0, rxdr->size);
1859
1860         rxdr->next_to_clean = 0;
1861         rxdr->next_to_use = 0;
1862
1863         return 0;
1864 }
1865
1866 /**
1867  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1868  *                                (Descriptors) for all queues
1869  * @adapter: board private structure
1870  *
1871  * Return 0 on success, negative on failure
1872  **/
1873
1874 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1875 {
1876         int i, err = 0;
1877
1878         for (i = 0; i < adapter->num_rx_queues; i++) {
1879                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1880                 if (err) {
1881                         DPRINTK(PROBE, ERR,
1882                                 "Allocation for Rx Queue %u failed\n", i);
1883                         for (i-- ; i >= 0; i--)
1884                                 e1000_free_rx_resources(adapter,
1885                                                         &adapter->rx_ring[i]);
1886                         break;
1887                 }
1888         }
1889
1890         return err;
1891 }
1892
1893 /**
1894  * e1000_setup_rctl - configure the receive control registers
1895  * @adapter: Board private structure
1896  **/
1897 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1898 {
1899         struct e1000_hw *hw = &adapter->hw;
1900         u32 rctl;
1901
1902         rctl = er32(RCTL);
1903
1904         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1905
1906         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1907                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1908                 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1909
1910         if (hw->tbi_compatibility_on == 1)
1911                 rctl |= E1000_RCTL_SBP;
1912         else
1913                 rctl &= ~E1000_RCTL_SBP;
1914
1915         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1916                 rctl &= ~E1000_RCTL_LPE;
1917         else
1918                 rctl |= E1000_RCTL_LPE;
1919
1920         /* Setup buffer sizes */
1921         rctl &= ~E1000_RCTL_SZ_4096;
1922         rctl |= E1000_RCTL_BSEX;
1923         switch (adapter->rx_buffer_len) {
1924                 case E1000_RXBUFFER_256:
1925                         rctl |= E1000_RCTL_SZ_256;
1926                         rctl &= ~E1000_RCTL_BSEX;
1927                         break;
1928                 case E1000_RXBUFFER_512:
1929                         rctl |= E1000_RCTL_SZ_512;
1930                         rctl &= ~E1000_RCTL_BSEX;
1931                         break;
1932                 case E1000_RXBUFFER_1024:
1933                         rctl |= E1000_RCTL_SZ_1024;
1934                         rctl &= ~E1000_RCTL_BSEX;
1935                         break;
1936                 case E1000_RXBUFFER_2048:
1937                 default:
1938                         rctl |= E1000_RCTL_SZ_2048;
1939                         rctl &= ~E1000_RCTL_BSEX;
1940                         break;
1941                 case E1000_RXBUFFER_4096:
1942                         rctl |= E1000_RCTL_SZ_4096;
1943                         break;
1944                 case E1000_RXBUFFER_8192:
1945                         rctl |= E1000_RCTL_SZ_8192;
1946                         break;
1947                 case E1000_RXBUFFER_16384:
1948                         rctl |= E1000_RCTL_SZ_16384;
1949                         break;
1950         }
1951
1952         ew32(RCTL, rctl);
1953 }
1954
1955 /**
1956  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1957  * @adapter: board private structure
1958  *
1959  * Configure the Rx unit of the MAC after a reset.
1960  **/
1961
1962 static void e1000_configure_rx(struct e1000_adapter *adapter)
1963 {
1964         u64 rdba;
1965         struct e1000_hw *hw = &adapter->hw;
1966         u32 rdlen, rctl, rxcsum, ctrl_ext;
1967
1968         rdlen = adapter->rx_ring[0].count *
1969                 sizeof(struct e1000_rx_desc);
1970         adapter->clean_rx = e1000_clean_rx_irq;
1971         adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1972
1973         /* disable receives while setting up the descriptors */
1974         rctl = er32(RCTL);
1975         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1976
1977         /* set the Receive Delay Timer Register */
1978         ew32(RDTR, adapter->rx_int_delay);
1979
1980         if (hw->mac_type >= e1000_82540) {
1981                 ew32(RADV, adapter->rx_abs_int_delay);
1982                 if (adapter->itr_setting != 0)
1983                         ew32(ITR, 1000000000 / (adapter->itr * 256));
1984         }
1985
1986         if (hw->mac_type >= e1000_82571) {
1987                 ctrl_ext = er32(CTRL_EXT);
1988                 /* Reset delay timers after every interrupt */
1989                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1990                 /* Auto-Mask interrupts upon ICR access */
1991                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1992                 ew32(IAM, 0xffffffff);
1993                 ew32(CTRL_EXT, ctrl_ext);
1994                 E1000_WRITE_FLUSH();
1995         }
1996
1997         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1998          * the Base and Length of the Rx Descriptor Ring */
1999         switch (adapter->num_rx_queues) {
2000         case 1:
2001         default:
2002                 rdba = adapter->rx_ring[0].dma;
2003                 ew32(RDLEN, rdlen);
2004                 ew32(RDBAH, (rdba >> 32));
2005                 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2006                 ew32(RDT, 0);
2007                 ew32(RDH, 0);
2008                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2009                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2010                 break;
2011         }
2012
2013         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2014         if (hw->mac_type >= e1000_82543) {
2015                 rxcsum = er32(RXCSUM);
2016                 if (adapter->rx_csum)
2017                         rxcsum |= E1000_RXCSUM_TUOFL;
2018                 else
2019                         /* don't need to clear IPPCSE as it defaults to 0 */
2020                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2021                 ew32(RXCSUM, rxcsum);
2022         }
2023
2024         /* Enable Receives */
2025         ew32(RCTL, rctl);
2026 }
2027
2028 /**
2029  * e1000_free_tx_resources - Free Tx Resources per Queue
2030  * @adapter: board private structure
2031  * @tx_ring: Tx descriptor ring for a specific queue
2032  *
2033  * Free all transmit software resources
2034  **/
2035
2036 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2037                                     struct e1000_tx_ring *tx_ring)
2038 {
2039         struct pci_dev *pdev = adapter->pdev;
2040
2041         e1000_clean_tx_ring(adapter, tx_ring);
2042
2043         vfree(tx_ring->buffer_info);
2044         tx_ring->buffer_info = NULL;
2045
2046         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2047
2048         tx_ring->desc = NULL;
2049 }
2050
2051 /**
2052  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2053  * @adapter: board private structure
2054  *
2055  * Free all transmit software resources
2056  **/
2057
2058 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2059 {
2060         int i;
2061
2062         for (i = 0; i < adapter->num_tx_queues; i++)
2063                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2064 }
2065
2066 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2067                                              struct e1000_buffer *buffer_info)
2068 {
2069         buffer_info->dma = 0;
2070         if (buffer_info->skb) {
2071                 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
2072                               DMA_TO_DEVICE);
2073                 dev_kfree_skb_any(buffer_info->skb);
2074                 buffer_info->skb = NULL;
2075         }
2076         buffer_info->time_stamp = 0;
2077         /* buffer_info must be completely set up in the transmit path */
2078 }
2079
2080 /**
2081  * e1000_clean_tx_ring - Free Tx Buffers
2082  * @adapter: board private structure
2083  * @tx_ring: ring to be cleaned
2084  **/
2085
2086 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2087                                 struct e1000_tx_ring *tx_ring)
2088 {
2089         struct e1000_hw *hw = &adapter->hw;
2090         struct e1000_buffer *buffer_info;
2091         unsigned long size;
2092         unsigned int i;
2093
2094         /* Free all the Tx ring sk_buffs */
2095
2096         for (i = 0; i < tx_ring->count; i++) {
2097                 buffer_info = &tx_ring->buffer_info[i];
2098                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2099         }
2100
2101         size = sizeof(struct e1000_buffer) * tx_ring->count;
2102         memset(tx_ring->buffer_info, 0, size);
2103
2104         /* Zero out the descriptor ring */
2105
2106         memset(tx_ring->desc, 0, tx_ring->size);
2107
2108         tx_ring->next_to_use = 0;
2109         tx_ring->next_to_clean = 0;
2110         tx_ring->last_tx_tso = 0;
2111
2112         writel(0, hw->hw_addr + tx_ring->tdh);
2113         writel(0, hw->hw_addr + tx_ring->tdt);
2114 }
2115
2116 /**
2117  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2118  * @adapter: board private structure
2119  **/
2120
2121 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2122 {
2123         int i;
2124
2125         for (i = 0; i < adapter->num_tx_queues; i++)
2126                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2127 }
2128
2129 /**
2130  * e1000_free_rx_resources - Free Rx Resources
2131  * @adapter: board private structure
2132  * @rx_ring: ring to clean the resources from
2133  *
2134  * Free all receive software resources
2135  **/
2136
2137 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2138                                     struct e1000_rx_ring *rx_ring)
2139 {
2140         struct pci_dev *pdev = adapter->pdev;
2141
2142         e1000_clean_rx_ring(adapter, rx_ring);
2143
2144         vfree(rx_ring->buffer_info);
2145         rx_ring->buffer_info = NULL;
2146
2147         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2148
2149         rx_ring->desc = NULL;
2150 }
2151
2152 /**
2153  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2154  * @adapter: board private structure
2155  *
2156  * Free all receive software resources
2157  **/
2158
2159 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2160 {
2161         int i;
2162
2163         for (i = 0; i < adapter->num_rx_queues; i++)
2164                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2165 }
2166
2167 /**
2168  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2169  * @adapter: board private structure
2170  * @rx_ring: ring to free buffers from
2171  **/
2172
2173 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2174                                 struct e1000_rx_ring *rx_ring)
2175 {
2176         struct e1000_hw *hw = &adapter->hw;
2177         struct e1000_buffer *buffer_info;
2178         struct pci_dev *pdev = adapter->pdev;
2179         unsigned long size;
2180         unsigned int i;
2181
2182         /* Free all the Rx ring sk_buffs */
2183         for (i = 0; i < rx_ring->count; i++) {
2184                 buffer_info = &rx_ring->buffer_info[i];
2185                 if (buffer_info->skb) {
2186                         pci_unmap_single(pdev,
2187                                          buffer_info->dma,
2188                                          buffer_info->length,
2189                                          PCI_DMA_FROMDEVICE);
2190
2191                         dev_kfree_skb(buffer_info->skb);
2192                         buffer_info->skb = NULL;
2193                 }
2194         }
2195
2196         size = sizeof(struct e1000_buffer) * rx_ring->count;
2197         memset(rx_ring->buffer_info, 0, size);
2198
2199         /* Zero out the descriptor ring */
2200
2201         memset(rx_ring->desc, 0, rx_ring->size);
2202
2203         rx_ring->next_to_clean = 0;
2204         rx_ring->next_to_use = 0;
2205
2206         writel(0, hw->hw_addr + rx_ring->rdh);
2207         writel(0, hw->hw_addr + rx_ring->rdt);
2208 }
2209
2210 /**
2211  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2212  * @adapter: board private structure
2213  **/
2214
2215 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2216 {
2217         int i;
2218
2219         for (i = 0; i < adapter->num_rx_queues; i++)
2220                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2221 }
2222
2223 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2224  * and memory write and invalidate disabled for certain operations
2225  */
2226 static void e1000_enter_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         e1000_pci_clear_mwi(hw);
2233
2234         rctl = er32(RCTL);
2235         rctl |= E1000_RCTL_RST;
2236         ew32(RCTL, rctl);
2237         E1000_WRITE_FLUSH();
2238         mdelay(5);
2239
2240         if (netif_running(netdev))
2241                 e1000_clean_all_rx_rings(adapter);
2242 }
2243
2244 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2245 {
2246         struct e1000_hw *hw = &adapter->hw;
2247         struct net_device *netdev = adapter->netdev;
2248         u32 rctl;
2249
2250         rctl = er32(RCTL);
2251         rctl &= ~E1000_RCTL_RST;
2252         ew32(RCTL, rctl);
2253         E1000_WRITE_FLUSH();
2254         mdelay(5);
2255
2256         if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2257                 e1000_pci_set_mwi(hw);
2258
2259         if (netif_running(netdev)) {
2260                 /* No need to loop, because 82542 supports only 1 queue */
2261                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2262                 e1000_configure_rx(adapter);
2263                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2264         }
2265 }
2266
2267 /**
2268  * e1000_set_mac - Change the Ethernet Address of the NIC
2269  * @netdev: network interface device structure
2270  * @p: pointer to an address structure
2271  *
2272  * Returns 0 on success, negative on failure
2273  **/
2274
2275 static int e1000_set_mac(struct net_device *netdev, void *p)
2276 {
2277         struct e1000_adapter *adapter = netdev_priv(netdev);
2278         struct e1000_hw *hw = &adapter->hw;
2279         struct sockaddr *addr = p;
2280
2281         if (!is_valid_ether_addr(addr->sa_data))
2282                 return -EADDRNOTAVAIL;
2283
2284         /* 82542 2.0 needs to be in reset to write receive address registers */
2285
2286         if (hw->mac_type == e1000_82542_rev2_0)
2287                 e1000_enter_82542_rst(adapter);
2288
2289         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2290         memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2291
2292         e1000_rar_set(hw, hw->mac_addr, 0);
2293
2294         /* With 82571 controllers, LAA may be overwritten (with the default)
2295          * due to controller reset from the other port. */
2296         if (hw->mac_type == e1000_82571) {
2297                 /* activate the work around */
2298                 hw->laa_is_present = 1;
2299
2300                 /* Hold a copy of the LAA in RAR[14] This is done so that
2301                  * between the time RAR[0] gets clobbered  and the time it
2302                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2303                  * of the RARs and no incoming packets directed to this port
2304                  * are dropped. Eventaully the LAA will be in RAR[0] and
2305                  * RAR[14] */
2306                 e1000_rar_set(hw, hw->mac_addr,
2307                                         E1000_RAR_ENTRIES - 1);
2308         }
2309
2310         if (hw->mac_type == e1000_82542_rev2_0)
2311                 e1000_leave_82542_rst(adapter);
2312
2313         return 0;
2314 }
2315
2316 /**
2317  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2318  * @netdev: network interface device structure
2319  *
2320  * The set_rx_mode entry point is called whenever the unicast or multicast
2321  * address lists or the network interface flags are updated. This routine is
2322  * responsible for configuring the hardware for proper unicast, multicast,
2323  * promiscuous mode, and all-multi behavior.
2324  **/
2325
2326 static void e1000_set_rx_mode(struct net_device *netdev)
2327 {
2328         struct e1000_adapter *adapter = netdev_priv(netdev);
2329         struct e1000_hw *hw = &adapter->hw;
2330         struct dev_addr_list *uc_ptr;
2331         struct dev_addr_list *mc_ptr;
2332         u32 rctl;
2333         u32 hash_value;
2334         int i, rar_entries = E1000_RAR_ENTRIES;
2335         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2336                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2337                                 E1000_NUM_MTA_REGISTERS;
2338
2339         if (hw->mac_type == e1000_ich8lan)
2340                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2341
2342         /* reserve RAR[14] for LAA over-write work-around */
2343         if (hw->mac_type == e1000_82571)
2344                 rar_entries--;
2345
2346         /* Check for Promiscuous and All Multicast modes */
2347
2348         rctl = er32(RCTL);
2349
2350         if (netdev->flags & IFF_PROMISC) {
2351                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2352                 rctl &= ~E1000_RCTL_VFE;
2353         } else {
2354                 if (netdev->flags & IFF_ALLMULTI) {
2355                         rctl |= E1000_RCTL_MPE;
2356                 } else {
2357                         rctl &= ~E1000_RCTL_MPE;
2358                 }
2359                 if (adapter->hw.mac_type != e1000_ich8lan)
2360                         rctl |= E1000_RCTL_VFE;
2361         }
2362
2363         uc_ptr = NULL;
2364         if (netdev->uc_count > rar_entries - 1) {
2365                 rctl |= E1000_RCTL_UPE;
2366         } else if (!(netdev->flags & IFF_PROMISC)) {
2367                 rctl &= ~E1000_RCTL_UPE;
2368                 uc_ptr = netdev->uc_list;
2369         }
2370
2371         ew32(RCTL, rctl);
2372
2373         /* 82542 2.0 needs to be in reset to write receive address registers */
2374
2375         if (hw->mac_type == e1000_82542_rev2_0)
2376                 e1000_enter_82542_rst(adapter);
2377
2378         /* load the first 14 addresses into the exact filters 1-14. Unicast
2379          * addresses take precedence to avoid disabling unicast filtering
2380          * when possible.
2381          *
2382          * RAR 0 is used for the station MAC adddress
2383          * if there are not 14 addresses, go ahead and clear the filters
2384          * -- with 82571 controllers only 0-13 entries are filled here
2385          */
2386         mc_ptr = netdev->mc_list;
2387
2388         for (i = 1; i < rar_entries; i++) {
2389                 if (uc_ptr) {
2390                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2391                         uc_ptr = uc_ptr->next;
2392                 } else if (mc_ptr) {
2393                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2394                         mc_ptr = mc_ptr->next;
2395                 } else {
2396                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2397                         E1000_WRITE_FLUSH();
2398                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2399                         E1000_WRITE_FLUSH();
2400                 }
2401         }
2402         WARN_ON(uc_ptr != NULL);
2403
2404         /* clear the old settings from the multicast hash table */
2405
2406         for (i = 0; i < mta_reg_count; i++) {
2407                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2408                 E1000_WRITE_FLUSH();
2409         }
2410
2411         /* load any remaining addresses into the hash table */
2412
2413         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2414                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2415                 e1000_mta_set(hw, hash_value);
2416         }
2417
2418         if (hw->mac_type == e1000_82542_rev2_0)
2419                 e1000_leave_82542_rst(adapter);
2420 }
2421
2422 /* Need to wait a few seconds after link up to get diagnostic information from
2423  * the phy */
2424
2425 static void e1000_update_phy_info(unsigned long data)
2426 {
2427         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2428         struct e1000_hw *hw = &adapter->hw;
2429         e1000_phy_get_info(hw, &adapter->phy_info);
2430 }
2431
2432 /**
2433  * e1000_82547_tx_fifo_stall - Timer Call-back
2434  * @data: pointer to adapter cast into an unsigned long
2435  **/
2436
2437 static void e1000_82547_tx_fifo_stall(unsigned long data)
2438 {
2439         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2440         struct e1000_hw *hw = &adapter->hw;
2441         struct net_device *netdev = adapter->netdev;
2442         u32 tctl;
2443
2444         if (atomic_read(&adapter->tx_fifo_stall)) {
2445                 if ((er32(TDT) == er32(TDH)) &&
2446                    (er32(TDFT) == er32(TDFH)) &&
2447                    (er32(TDFTS) == er32(TDFHS))) {
2448                         tctl = er32(TCTL);
2449                         ew32(TCTL, tctl & ~E1000_TCTL_EN);
2450                         ew32(TDFT, adapter->tx_head_addr);
2451                         ew32(TDFH, adapter->tx_head_addr);
2452                         ew32(TDFTS, adapter->tx_head_addr);
2453                         ew32(TDFHS, adapter->tx_head_addr);
2454                         ew32(TCTL, tctl);
2455                         E1000_WRITE_FLUSH();
2456
2457                         adapter->tx_fifo_head = 0;
2458                         atomic_set(&adapter->tx_fifo_stall, 0);
2459                         netif_wake_queue(netdev);
2460                 } else {
2461                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2462                 }
2463         }
2464 }
2465
2466 /**
2467  * e1000_watchdog - Timer Call-back
2468  * @data: pointer to adapter cast into an unsigned long
2469  **/
2470 static void e1000_watchdog(unsigned long data)
2471 {
2472         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2473         struct e1000_hw *hw = &adapter->hw;
2474         struct net_device *netdev = adapter->netdev;
2475         struct e1000_tx_ring *txdr = adapter->tx_ring;
2476         u32 link, tctl;
2477         s32 ret_val;
2478
2479         ret_val = e1000_check_for_link(hw);
2480         if ((ret_val == E1000_ERR_PHY) &&
2481             (hw->phy_type == e1000_phy_igp_3) &&
2482             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2483                 /* See e1000_kumeran_lock_loss_workaround() */
2484                 DPRINTK(LINK, INFO,
2485                         "Gigabit has been disabled, downgrading speed\n");
2486         }
2487
2488         if (hw->mac_type == e1000_82573) {
2489                 e1000_enable_tx_pkt_filtering(hw);
2490                 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2491                         e1000_update_mng_vlan(adapter);
2492         }
2493
2494         if ((hw->media_type == e1000_media_type_internal_serdes) &&
2495            !(er32(TXCW) & E1000_TXCW_ANE))
2496                 link = !hw->serdes_link_down;
2497         else
2498                 link = er32(STATUS) & E1000_STATUS_LU;
2499
2500         if (link) {
2501                 if (!netif_carrier_ok(netdev)) {
2502                         u32 ctrl;
2503                         bool txb2b = true;
2504                         e1000_get_speed_and_duplex(hw,
2505                                                    &adapter->link_speed,
2506                                                    &adapter->link_duplex);
2507
2508                         ctrl = er32(CTRL);
2509                         printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s, "
2510                                "Flow Control: %s\n",
2511                                netdev->name,
2512                                adapter->link_speed,
2513                                adapter->link_duplex == FULL_DUPLEX ?
2514                                 "Full Duplex" : "Half Duplex",
2515                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2516                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2517                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2518                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2519
2520                         /* tweak tx_queue_len according to speed/duplex
2521                          * and adjust the timeout factor */
2522                         netdev->tx_queue_len = adapter->tx_queue_len;
2523                         adapter->tx_timeout_factor = 1;
2524                         switch (adapter->link_speed) {
2525                         case SPEED_10:
2526                                 txb2b = false;
2527                                 netdev->tx_queue_len = 10;
2528                                 adapter->tx_timeout_factor = 8;
2529                                 break;
2530                         case SPEED_100:
2531                                 txb2b = false;
2532                                 netdev->tx_queue_len = 100;
2533                                 /* maybe add some timeout factor ? */
2534                                 break;
2535                         }
2536
2537                         if ((hw->mac_type == e1000_82571 ||
2538                              hw->mac_type == e1000_82572) &&
2539                             !txb2b) {
2540                                 u32 tarc0;
2541                                 tarc0 = er32(TARC0);
2542                                 tarc0 &= ~(1 << 21);
2543                                 ew32(TARC0, tarc0);
2544                         }
2545
2546                         /* disable TSO for pcie and 10/100 speeds, to avoid
2547                          * some hardware issues */
2548                         if (!adapter->tso_force &&
2549                             hw->bus_type == e1000_bus_type_pci_express){
2550                                 switch (adapter->link_speed) {
2551                                 case SPEED_10:
2552                                 case SPEED_100:
2553                                         DPRINTK(PROBE,INFO,
2554                                         "10/100 speed: disabling TSO\n");
2555                                         netdev->features &= ~NETIF_F_TSO;
2556                                         netdev->features &= ~NETIF_F_TSO6;
2557                                         break;
2558                                 case SPEED_1000:
2559                                         netdev->features |= NETIF_F_TSO;
2560                                         netdev->features |= NETIF_F_TSO6;
2561                                         break;
2562                                 default:
2563                                         /* oops */
2564                                         break;
2565                                 }
2566                         }
2567
2568                         /* enable transmits in the hardware, need to do this
2569                          * after setting TARC0 */
2570                         tctl = er32(TCTL);
2571                         tctl |= E1000_TCTL_EN;
2572                         ew32(TCTL, tctl);
2573
2574                         netif_carrier_on(netdev);
2575                         netif_wake_queue(netdev);
2576                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2577                         adapter->smartspeed = 0;
2578                 } else {
2579                         /* make sure the receive unit is started */
2580                         if (hw->rx_needs_kicking) {
2581                                 u32 rctl = er32(RCTL);
2582                                 ew32(RCTL, rctl | E1000_RCTL_EN);
2583                         }
2584                 }
2585         } else {
2586                 if (netif_carrier_ok(netdev)) {
2587                         adapter->link_speed = 0;
2588                         adapter->link_duplex = 0;
2589                         printk(KERN_INFO "e1000: %s NIC Link is Down\n",
2590                                netdev->name);
2591                         netif_carrier_off(netdev);
2592                         netif_stop_queue(netdev);
2593                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2594
2595                         /* 80003ES2LAN workaround--
2596                          * For packet buffer work-around on link down event;
2597                          * disable receives in the ISR and
2598                          * reset device here in the watchdog
2599                          */
2600                         if (hw->mac_type == e1000_80003es2lan)
2601                                 /* reset device */
2602                                 schedule_work(&adapter->reset_task);
2603                 }
2604
2605                 e1000_smartspeed(adapter);
2606         }
2607
2608         e1000_update_stats(adapter);
2609
2610         hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2611         adapter->tpt_old = adapter->stats.tpt;
2612         hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2613         adapter->colc_old = adapter->stats.colc;
2614
2615         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2616         adapter->gorcl_old = adapter->stats.gorcl;
2617         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2618         adapter->gotcl_old = adapter->stats.gotcl;
2619
2620         e1000_update_adaptive(hw);
2621
2622         if (!netif_carrier_ok(netdev)) {
2623                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2624                         /* We've lost link, so the controller stops DMA,
2625                          * but we've got queued Tx work that's never going
2626                          * to get done, so reset controller to flush Tx.
2627                          * (Do the reset outside of interrupt context). */
2628                         adapter->tx_timeout_count++;
2629                         schedule_work(&adapter->reset_task);
2630                 }
2631         }
2632
2633         /* Cause software interrupt to ensure rx ring is cleaned */
2634         ew32(ICS, E1000_ICS_RXDMT0);
2635
2636         /* Force detection of hung controller every watchdog period */
2637         adapter->detect_tx_hung = true;
2638
2639         /* With 82571 controllers, LAA may be overwritten due to controller
2640          * reset from the other port. Set the appropriate LAA in RAR[0] */
2641         if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2642                 e1000_rar_set(hw, hw->mac_addr, 0);
2643
2644         /* Reset the timer */
2645         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2646 }
2647
2648 enum latency_range {
2649         lowest_latency = 0,
2650         low_latency = 1,
2651         bulk_latency = 2,
2652         latency_invalid = 255
2653 };
2654
2655 /**
2656  * e1000_update_itr - update the dynamic ITR value based on statistics
2657  *      Stores a new ITR value based on packets and byte
2658  *      counts during the last interrupt.  The advantage of per interrupt
2659  *      computation is faster updates and more accurate ITR for the current
2660  *      traffic pattern.  Constants in this function were computed
2661  *      based on theoretical maximum wire speed and thresholds were set based
2662  *      on testing data as well as attempting to minimize response time
2663  *      while increasing bulk throughput.
2664  *      this functionality is controlled by the InterruptThrottleRate module
2665  *      parameter (see e1000_param.c)
2666  * @adapter: pointer to adapter
2667  * @itr_setting: current adapter->itr
2668  * @packets: the number of packets during this measurement interval
2669  * @bytes: the number of bytes during this measurement interval
2670  **/
2671 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2672                                      u16 itr_setting, int packets, int bytes)
2673 {
2674         unsigned int retval = itr_setting;
2675         struct e1000_hw *hw = &adapter->hw;
2676
2677         if (unlikely(hw->mac_type < e1000_82540))
2678                 goto update_itr_done;
2679
2680         if (packets == 0)
2681                 goto update_itr_done;
2682
2683         switch (itr_setting) {
2684         case lowest_latency:
2685                 /* jumbo frames get bulk treatment*/
2686                 if (bytes/packets > 8000)
2687                         retval = bulk_latency;
2688                 else if ((packets < 5) && (bytes > 512))
2689                         retval = low_latency;
2690                 break;
2691         case low_latency:  /* 50 usec aka 20000 ints/s */
2692                 if (bytes > 10000) {
2693                         /* jumbo frames need bulk latency setting */
2694                         if (bytes/packets > 8000)
2695                                 retval = bulk_latency;
2696                         else if ((packets < 10) || ((bytes/packets) > 1200))
2697                                 retval = bulk_latency;
2698                         else if ((packets > 35))
2699                                 retval = lowest_latency;
2700                 } else if (bytes/packets > 2000)
2701                         retval = bulk_latency;
2702                 else if (packets <= 2 && bytes < 512)
2703                         retval = lowest_latency;
2704                 break;
2705         case bulk_latency: /* 250 usec aka 4000 ints/s */
2706                 if (bytes > 25000) {
2707                         if (packets > 35)
2708                                 retval = low_latency;
2709                 } else if (bytes < 6000) {
2710                         retval = low_latency;
2711                 }
2712                 break;
2713         }
2714
2715 update_itr_done:
2716         return retval;
2717 }
2718
2719 static void e1000_set_itr(struct e1000_adapter *adapter)
2720 {
2721         struct e1000_hw *hw = &adapter->hw;
2722         u16 current_itr;
2723         u32 new_itr = adapter->itr;
2724
2725         if (unlikely(hw->mac_type < e1000_82540))
2726                 return;
2727
2728         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2729         if (unlikely(adapter->link_speed != SPEED_1000)) {
2730                 current_itr = 0;
2731                 new_itr = 4000;
2732                 goto set_itr_now;
2733         }
2734
2735         adapter->tx_itr = e1000_update_itr(adapter,
2736                                     adapter->tx_itr,
2737                                     adapter->total_tx_packets,
2738                                     adapter->total_tx_bytes);
2739         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2740         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2741                 adapter->tx_itr = low_latency;
2742
2743         adapter->rx_itr = e1000_update_itr(adapter,
2744                                     adapter->rx_itr,
2745                                     adapter->total_rx_packets,
2746                                     adapter->total_rx_bytes);
2747         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2748         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2749                 adapter->rx_itr = low_latency;
2750
2751         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2752
2753         switch (current_itr) {
2754         /* counts and packets in update_itr are dependent on these numbers */
2755         case lowest_latency:
2756                 new_itr = 70000;
2757                 break;
2758         case low_latency:
2759                 new_itr = 20000; /* aka hwitr = ~200 */
2760                 break;
2761         case bulk_latency:
2762                 new_itr = 4000;
2763                 break;
2764         default:
2765                 break;
2766         }
2767
2768 set_itr_now:
2769         if (new_itr != adapter->itr) {
2770                 /* this attempts to bias the interrupt rate towards Bulk
2771                  * by adding intermediate steps when interrupt rate is
2772                  * increasing */
2773                 new_itr = new_itr > adapter->itr ?
2774                              min(adapter->itr + (new_itr >> 2), new_itr) :
2775                              new_itr;
2776                 adapter->itr = new_itr;
2777                 ew32(ITR, 1000000000 / (new_itr * 256));
2778         }
2779
2780         return;
2781 }
2782
2783 #define E1000_TX_FLAGS_CSUM             0x00000001
2784 #define E1000_TX_FLAGS_VLAN             0x00000002
2785 #define E1000_TX_FLAGS_TSO              0x00000004
2786 #define E1000_TX_FLAGS_IPV4             0x00000008
2787 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2788 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2789
2790 static int e1000_tso(struct e1000_adapter *adapter,
2791                      struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2792 {
2793         struct e1000_context_desc *context_desc;
2794         struct e1000_buffer *buffer_info;
2795         unsigned int i;
2796         u32 cmd_length = 0;
2797         u16 ipcse = 0, tucse, mss;
2798         u8 ipcss, ipcso, tucss, tucso, hdr_len;
2799         int err;
2800
2801         if (skb_is_gso(skb)) {
2802                 if (skb_header_cloned(skb)) {
2803                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2804                         if (err)
2805                                 return err;
2806                 }
2807
2808                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2809                 mss = skb_shinfo(skb)->gso_size;
2810                 if (skb->protocol == htons(ETH_P_IP)) {
2811                         struct iphdr *iph = ip_hdr(skb);
2812                         iph->tot_len = 0;
2813                         iph->check = 0;
2814                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2815                                                                  iph->daddr, 0,
2816                                                                  IPPROTO_TCP,
2817                                                                  0);
2818                         cmd_length = E1000_TXD_CMD_IP;
2819                         ipcse = skb_transport_offset(skb) - 1;
2820                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2821                         ipv6_hdr(skb)->payload_len = 0;
2822                         tcp_hdr(skb)->check =
2823                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2824                                                  &ipv6_hdr(skb)->daddr,
2825                                                  0, IPPROTO_TCP, 0);
2826                         ipcse = 0;
2827                 }
2828                 ipcss = skb_network_offset(skb);
2829                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2830                 tucss = skb_transport_offset(skb);
2831                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2832                 tucse = 0;
2833
2834                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2835                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2836
2837                 i = tx_ring->next_to_use;
2838                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2839                 buffer_info = &tx_ring->buffer_info[i];
2840
2841                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2842                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2843                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2844                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2845                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2846                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2847                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2848                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2849                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2850
2851                 buffer_info->time_stamp = jiffies;
2852                 buffer_info->next_to_watch = i;
2853
2854                 if (++i == tx_ring->count) i = 0;
2855                 tx_ring->next_to_use = i;
2856
2857                 return true;
2858         }
2859         return false;
2860 }
2861
2862 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2863                           struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2864 {
2865         struct e1000_context_desc *context_desc;
2866         struct e1000_buffer *buffer_info;
2867         unsigned int i;
2868         u8 css;
2869         u32 cmd_len = E1000_TXD_CMD_DEXT;
2870
2871         if (skb->ip_summed != CHECKSUM_PARTIAL)
2872                 return false;
2873
2874         switch (skb->protocol) {
2875         case cpu_to_be16(ETH_P_IP):
2876                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2877                         cmd_len |= E1000_TXD_CMD_TCP;
2878                 break;
2879         case cpu_to_be16(ETH_P_IPV6):
2880                 /* XXX not handling all IPV6 headers */
2881                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2882                         cmd_len |= E1000_TXD_CMD_TCP;
2883                 break;
2884         default:
2885                 if (unlikely(net_ratelimit()))
2886                         DPRINTK(DRV, WARNING,
2887                                 "checksum_partial proto=%x!\n", skb->protocol);
2888                 break;
2889         }
2890
2891         css = skb_transport_offset(skb);
2892
2893         i = tx_ring->next_to_use;
2894         buffer_info = &tx_ring->buffer_info[i];
2895         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2896
2897         context_desc->lower_setup.ip_config = 0;
2898         context_desc->upper_setup.tcp_fields.tucss = css;
2899         context_desc->upper_setup.tcp_fields.tucso =
2900                 css + skb->csum_offset;
2901         context_desc->upper_setup.tcp_fields.tucse = 0;
2902         context_desc->tcp_seg_setup.data = 0;
2903         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2904
2905         buffer_info->time_stamp = jiffies;
2906         buffer_info->next_to_watch = i;
2907
2908         if (unlikely(++i == tx_ring->count)) i = 0;
2909         tx_ring->next_to_use = i;
2910
2911         return true;
2912 }
2913
2914 #define E1000_MAX_TXD_PWR       12
2915 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2916
2917 static int e1000_tx_map(struct e1000_adapter *adapter,
2918                         struct e1000_tx_ring *tx_ring,
2919                         struct sk_buff *skb, unsigned int first,
2920                         unsigned int max_per_txd, unsigned int nr_frags,
2921                         unsigned int mss)
2922 {
2923         struct e1000_hw *hw = &adapter->hw;
2924         struct e1000_buffer *buffer_info;
2925         unsigned int len = skb_headlen(skb);
2926         unsigned int offset, size, count = 0, i;
2927         unsigned int f;
2928         dma_addr_t *map;
2929
2930         i = tx_ring->next_to_use;
2931
2932         if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
2933                 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
2934                 return 0;
2935         }
2936
2937         map = skb_shinfo(skb)->dma_maps;
2938         offset = 0;
2939
2940         while (len) {
2941                 buffer_info = &tx_ring->buffer_info[i];
2942                 size = min(len, max_per_txd);
2943                 /* Workaround for Controller erratum --
2944                  * descriptor for non-tso packet in a linear SKB that follows a
2945                  * tso gets written back prematurely before the data is fully
2946                  * DMA'd to the controller */
2947                 if (!skb->data_len && tx_ring->last_tx_tso &&
2948                     !skb_is_gso(skb)) {
2949                         tx_ring->last_tx_tso = 0;
2950                         size -= 4;
2951                 }
2952
2953                 /* Workaround for premature desc write-backs
2954                  * in TSO mode.  Append 4-byte sentinel desc */
2955                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2956                         size -= 4;
2957                 /* work-around for errata 10 and it applies
2958                  * to all controllers in PCI-X mode
2959                  * The fix is to make sure that the first descriptor of a
2960                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2961                  */
2962                 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2963                                 (size > 2015) && count == 0))
2964                         size = 2015;
2965
2966                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2967                  * terminating buffers within evenly-aligned dwords. */
2968                 if (unlikely(adapter->pcix_82544 &&
2969                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2970                    size > 4))
2971                         size -= 4;
2972
2973                 buffer_info->length = size;
2974                 buffer_info->dma = map[0] + offset;
2975                 buffer_info->time_stamp = jiffies;
2976                 buffer_info->next_to_watch = i;
2977
2978                 len -= size;
2979                 offset += size;
2980                 count++;
2981                 if (len) {
2982                         i++;
2983                         if (unlikely(i == tx_ring->count))
2984                                 i = 0;
2985                 }
2986         }
2987
2988         for (f = 0; f < nr_frags; f++) {
2989                 struct skb_frag_struct *frag;
2990
2991                 frag = &skb_shinfo(skb)->frags[f];
2992                 len = frag->size;
2993                 offset = 0;
2994
2995                 while (len) {
2996                         i++;
2997                         if (unlikely(i == tx_ring->count))
2998                                 i = 0;
2999
3000                         buffer_info = &tx_ring->buffer_info[i];
3001                         size = min(len, max_per_txd);
3002                         /* Workaround for premature desc write-backs
3003                          * in TSO mode.  Append 4-byte sentinel desc */
3004                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3005                                 size -= 4;
3006                         /* Workaround for potential 82544 hang in PCI-X.
3007                          * Avoid terminating buffers within evenly-aligned
3008                          * dwords. */
3009                         if (unlikely(adapter->pcix_82544 &&
3010                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3011                            size > 4))
3012                                 size -= 4;
3013
3014                         buffer_info->length = size;
3015                         buffer_info->dma = map[f + 1] + offset;
3016                         buffer_info->time_stamp = jiffies;
3017                         buffer_info->next_to_watch = i;
3018
3019                         len -= size;
3020                         offset += size;
3021                         count++;
3022                 }
3023         }
3024
3025         tx_ring->buffer_info[i].skb = skb;
3026         tx_ring->buffer_info[first].next_to_watch = i;
3027
3028         return count;
3029 }
3030
3031 static void e1000_tx_queue(struct e1000_adapter *adapter,
3032                            struct e1000_tx_ring *tx_ring, int tx_flags,
3033                            int count)
3034 {
3035         struct e1000_hw *hw = &adapter->hw;
3036         struct e1000_tx_desc *tx_desc = NULL;
3037         struct e1000_buffer *buffer_info;
3038         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3039         unsigned int i;
3040
3041         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3042                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3043                              E1000_TXD_CMD_TSE;
3044                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3045
3046                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3047                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3048         }
3049
3050         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3051                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3052                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3053         }
3054
3055         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3056                 txd_lower |= E1000_TXD_CMD_VLE;
3057                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3058         }
3059
3060         i = tx_ring->next_to_use;
3061
3062         while (count--) {
3063                 buffer_info = &tx_ring->buffer_info[i];
3064                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3065                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3066                 tx_desc->lower.data =
3067                         cpu_to_le32(txd_lower | buffer_info->length);
3068                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3069                 if (unlikely(++i == tx_ring->count)) i = 0;
3070         }
3071
3072         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3073
3074         /* Force memory writes to complete before letting h/w
3075          * know there are new descriptors to fetch.  (Only
3076          * applicable for weak-ordered memory model archs,
3077          * such as IA-64). */
3078         wmb();
3079
3080         tx_ring->next_to_use = i;
3081         writel(i, hw->hw_addr + tx_ring->tdt);
3082         /* we need this if more than one processor can write to our tail
3083          * at a time, it syncronizes IO on IA64/Altix systems */
3084         mmiowb();
3085 }
3086
3087 /**
3088  * 82547 workaround to avoid controller hang in half-duplex environment.
3089  * The workaround is to avoid queuing a large packet that would span
3090  * the internal Tx FIFO ring boundary by notifying the stack to resend
3091  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3092  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3093  * to the beginning of the Tx FIFO.
3094  **/
3095
3096 #define E1000_FIFO_HDR                  0x10
3097 #define E1000_82547_PAD_LEN             0x3E0
3098
3099 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3100                                        struct sk_buff *skb)
3101 {
3102         u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3103         u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3104
3105         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3106
3107         if (adapter->link_duplex != HALF_DUPLEX)
3108                 goto no_fifo_stall_required;
3109
3110         if (atomic_read(&adapter->tx_fifo_stall))
3111                 return 1;
3112
3113         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3114                 atomic_set(&adapter->tx_fifo_stall, 1);
3115                 return 1;
3116         }
3117
3118 no_fifo_stall_required:
3119         adapter->tx_fifo_head += skb_fifo_len;
3120         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3121                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3122         return 0;
3123 }
3124
3125 #define MINIMUM_DHCP_PACKET_SIZE 282
3126 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3127                                     struct sk_buff *skb)
3128 {
3129         struct e1000_hw *hw =  &adapter->hw;
3130         u16 length, offset;
3131         if (vlan_tx_tag_present(skb)) {
3132                 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3133                         ( hw->mng_cookie.status &
3134                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3135                         return 0;
3136         }
3137         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3138                 struct ethhdr *eth = (struct ethhdr *)skb->data;
3139                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3140                         const struct iphdr *ip =
3141                                 (struct iphdr *)((u8 *)skb->data+14);
3142                         if (IPPROTO_UDP == ip->protocol) {
3143                                 struct udphdr *udp =
3144                                         (struct udphdr *)((u8 *)ip +
3145                                                 (ip->ihl << 2));
3146                                 if (ntohs(udp->dest) == 67) {
3147                                         offset = (u8 *)udp + 8 - skb->data;
3148                                         length = skb->len - offset;
3149
3150                                         return e1000_mng_write_dhcp_info(hw,
3151                                                         (u8 *)udp + 8,
3152                                                         length);
3153                                 }
3154                         }
3155                 }
3156         }
3157         return 0;
3158 }
3159
3160 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3161 {
3162         struct e1000_adapter *adapter = netdev_priv(netdev);
3163         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3164
3165         netif_stop_queue(netdev);
3166         /* Herbert's original patch had:
3167          *  smp_mb__after_netif_stop_queue();
3168          * but since that doesn't exist yet, just open code it. */
3169         smp_mb();
3170
3171         /* We need to check again in a case another CPU has just
3172          * made room available. */
3173         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3174                 return -EBUSY;
3175
3176         /* A reprieve! */
3177         netif_start_queue(netdev);
3178         ++adapter->restart_queue;
3179         return 0;
3180 }
3181
3182 static int e1000_maybe_stop_tx(struct net_device *netdev,
3183                                struct e1000_tx_ring *tx_ring, int size)
3184 {
3185         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3186                 return 0;
3187         return __e1000_maybe_stop_tx(netdev, size);
3188 }
3189
3190 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3191 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3192 {
3193         struct e1000_adapter *adapter = netdev_priv(netdev);
3194         struct e1000_hw *hw = &adapter->hw;
3195         struct e1000_tx_ring *tx_ring;
3196         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3197         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3198         unsigned int tx_flags = 0;
3199         unsigned int len = skb->len - skb->data_len;
3200         unsigned int nr_frags;
3201         unsigned int mss;
3202         int count = 0;
3203         int tso;
3204         unsigned int f;
3205
3206         /* This goes back to the question of how to logically map a tx queue
3207          * to a flow.  Right now, performance is impacted slightly negatively
3208          * if using multiple tx queues.  If the stack breaks away from a
3209          * single qdisc implementation, we can look at this again. */
3210         tx_ring = adapter->tx_ring;
3211
3212         if (unlikely(skb->len <= 0)) {
3213                 dev_kfree_skb_any(skb);
3214                 return NETDEV_TX_OK;
3215         }
3216
3217         /* 82571 and newer doesn't need the workaround that limited descriptor
3218          * length to 4kB */
3219         if (hw->mac_type >= e1000_82571)
3220                 max_per_txd = 8192;
3221
3222         mss = skb_shinfo(skb)->gso_size;
3223         /* The controller does a simple calculation to
3224          * make sure there is enough room in the FIFO before
3225          * initiating the DMA for each buffer.  The calc is:
3226          * 4 = ceil(buffer len/mss).  To make sure we don't
3227          * overrun the FIFO, adjust the max buffer len if mss
3228          * drops. */
3229         if (mss) {
3230                 u8 hdr_len;
3231                 max_per_txd = min(mss << 2, max_per_txd);
3232                 max_txd_pwr = fls(max_per_txd) - 1;
3233
3234                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3235                 * points to just header, pull a few bytes of payload from
3236                 * frags into skb->data */
3237                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3238                 if (skb->data_len && hdr_len == len) {
3239                         switch (hw->mac_type) {
3240                                 unsigned int pull_size;
3241                         case e1000_82544:
3242                                 /* Make sure we have room to chop off 4 bytes,
3243                                  * and that the end alignment will work out to
3244                                  * this hardware's requirements
3245                                  * NOTE: this is a TSO only workaround
3246                                  * if end byte alignment not correct move us
3247                                  * into the next dword */
3248                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3249                                         break;
3250                                 /* fall through */
3251                         case e1000_82571:
3252                         case e1000_82572:
3253                         case e1000_82573:
3254                         case e1000_ich8lan:
3255                                 pull_size = min((unsigned int)4, skb->data_len);
3256                                 if (!__pskb_pull_tail(skb, pull_size)) {
3257                                         DPRINTK(DRV, ERR,
3258                                                 "__pskb_pull_tail failed.\n");
3259                                         dev_kfree_skb_any(skb);
3260                                         return NETDEV_TX_OK;
3261                                 }
3262                                 len = skb->len - skb->data_len;
3263                                 break;
3264                         default:
3265                                 /* do nothing */
3266                                 break;
3267                         }
3268                 }
3269         }
3270
3271         /* reserve a descriptor for the offload context */
3272         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3273                 count++;
3274         count++;
3275
3276         /* Controller Erratum workaround */
3277         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3278                 count++;
3279
3280         count += TXD_USE_COUNT(len, max_txd_pwr);
3281
3282         if (adapter->pcix_82544)
3283                 count++;
3284
3285         /* work-around for errata 10 and it applies to all controllers
3286          * in PCI-X mode, so add one more descriptor to the count
3287          */
3288         if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3289                         (len > 2015)))
3290                 count++;
3291
3292         nr_frags = skb_shinfo(skb)->nr_frags;
3293         for (f = 0; f < nr_frags; f++)
3294                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3295                                        max_txd_pwr);
3296         if (adapter->pcix_82544)
3297                 count += nr_frags;
3298
3299
3300         if (hw->tx_pkt_filtering &&
3301             (hw->mac_type == e1000_82573))
3302                 e1000_transfer_dhcp_info(adapter, skb);
3303
3304         /* need: count + 2 desc gap to keep tail from touching
3305          * head, otherwise try next time */
3306         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3307                 return NETDEV_TX_BUSY;
3308
3309         if (unlikely(hw->mac_type == e1000_82547)) {
3310                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3311                         netif_stop_queue(netdev);
3312                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3313                         return NETDEV_TX_BUSY;
3314                 }
3315         }
3316
3317         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3318                 tx_flags |= E1000_TX_FLAGS_VLAN;
3319                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3320         }
3321
3322         first = tx_ring->next_to_use;
3323
3324         tso = e1000_tso(adapter, tx_ring, skb);
3325         if (tso < 0) {
3326                 dev_kfree_skb_any(skb);
3327                 return NETDEV_TX_OK;
3328         }
3329
3330         if (likely(tso)) {
3331                 tx_ring->last_tx_tso = 1;
3332                 tx_flags |= E1000_TX_FLAGS_TSO;
3333         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3334                 tx_flags |= E1000_TX_FLAGS_CSUM;
3335
3336         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3337          * 82571 hardware supports TSO capabilities for IPv6 as well...
3338          * no longer assume, we must. */
3339         if (likely(skb->protocol == htons(ETH_P_IP)))
3340                 tx_flags |= E1000_TX_FLAGS_IPV4;
3341
3342         count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3343                              nr_frags, mss);
3344
3345         if (count) {
3346                 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3347                 netdev->trans_start = jiffies;
3348                 /* Make sure there is space in the ring for the next send. */
3349                 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3350
3351         } else {
3352                 dev_kfree_skb_any(skb);
3353                 tx_ring->buffer_info[first].time_stamp = 0;
3354                 tx_ring->next_to_use = first;
3355         }
3356
3357         return NETDEV_TX_OK;
3358 }
3359
3360 /**
3361  * e1000_tx_timeout - Respond to a Tx Hang
3362  * @netdev: network interface device structure
3363  **/
3364
3365 static void e1000_tx_timeout(struct net_device *netdev)
3366 {
3367         struct e1000_adapter *adapter = netdev_priv(netdev);
3368
3369         /* Do the reset outside of interrupt context */
3370         adapter->tx_timeout_count++;
3371         schedule_work(&adapter->reset_task);
3372 }
3373
3374 static void e1000_reset_task(struct work_struct *work)
3375 {
3376         struct e1000_adapter *adapter =
3377                 container_of(work, struct e1000_adapter, reset_task);
3378
3379         e1000_reinit_locked(adapter);
3380 }
3381
3382 /**
3383  * e1000_get_stats - Get System Network Statistics
3384  * @netdev: network interface device structure
3385  *
3386  * Returns the address of the device statistics structure.
3387  * The statistics are actually updated from the timer callback.
3388  **/
3389
3390 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3391 {
3392         struct e1000_adapter *adapter = netdev_priv(netdev);
3393
3394         /* only return the current stats */
3395         return &adapter->net_stats;
3396 }
3397
3398 /**
3399  * e1000_change_mtu - Change the Maximum Transfer Unit
3400  * @netdev: network interface device structure
3401  * @new_mtu: new value for maximum frame size
3402  *
3403  * Returns 0 on success, negative on failure
3404  **/
3405
3406 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3407 {
3408         struct e1000_adapter *adapter = netdev_priv(netdev);
3409         struct e1000_hw *hw = &adapter->hw;
3410         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3411         u16 eeprom_data = 0;
3412
3413         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3414             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3415                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3416                 return -EINVAL;
3417         }
3418
3419         /* Adapter-specific max frame size limits. */
3420         switch (hw->mac_type) {
3421         case e1000_undefined ... e1000_82542_rev2_1:
3422         case e1000_ich8lan:
3423                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3424                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3425                         return -EINVAL;
3426                 }
3427                 break;
3428         case e1000_82573:
3429                 /* Jumbo Frames not supported if:
3430                  * - this is not an 82573L device
3431                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3432                 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3433                                   &eeprom_data);
3434                 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3435                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3436                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3437                                 DPRINTK(PROBE, ERR,
3438                                         "Jumbo Frames not supported.\n");
3439                                 return -EINVAL;
3440                         }
3441                         break;
3442                 }
3443                 /* ERT will be enabled later to enable wire speed receives */
3444
3445                 /* fall through to get support */
3446         case e1000_82571:
3447         case e1000_82572:
3448         case e1000_80003es2lan:
3449 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3450                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3451                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3452                         return -EINVAL;
3453                 }
3454                 break;
3455         default:
3456                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3457                 break;
3458         }
3459
3460         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3461          * means we reserve 2 more, this pushes us to allocate from the next
3462          * larger slab size
3463          * i.e. RXBUFFER_2048 --> size-4096 slab */
3464
3465         if (max_frame <= E1000_RXBUFFER_256)
3466                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3467         else if (max_frame <= E1000_RXBUFFER_512)
3468                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3469         else if (max_frame <= E1000_RXBUFFER_1024)
3470                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3471         else if (max_frame <= E1000_RXBUFFER_2048)
3472                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3473         else if (max_frame <= E1000_RXBUFFER_4096)
3474                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3475         else if (max_frame <= E1000_RXBUFFER_8192)
3476                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3477         else if (max_frame <= E1000_RXBUFFER_16384)
3478                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3479
3480         /* adjust allocation if LPE protects us, and we aren't using SBP */
3481         if (!hw->tbi_compatibility_on &&
3482             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3483              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3484                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3485
3486         netdev->mtu = new_mtu;
3487         hw->max_frame_size = max_frame;
3488
3489         if (netif_running(netdev))
3490                 e1000_reinit_locked(adapter);
3491
3492         return 0;
3493 }
3494
3495 /**
3496  * e1000_update_stats - Update the board statistics counters
3497  * @adapter: board private structure
3498  **/
3499
3500 void e1000_update_stats(struct e1000_adapter *adapter)
3501 {
3502         struct e1000_hw *hw = &adapter->hw;
3503         struct pci_dev *pdev = adapter->pdev;
3504         unsigned long flags;
3505         u16 phy_tmp;
3506
3507 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3508
3509         /*
3510          * Prevent stats update while adapter is being reset, or if the pci
3511          * connection is down.
3512          */
3513         if (adapter->link_speed == 0)
3514                 return;
3515         if (pci_channel_offline(pdev))
3516                 return;
3517
3518         spin_lock_irqsave(&adapter->stats_lock, flags);
3519
3520         /* these counters are modified from e1000_tbi_adjust_stats,
3521          * called from the interrupt context, so they must only
3522          * be written while holding adapter->stats_lock
3523          */
3524
3525         adapter->stats.crcerrs += er32(CRCERRS);
3526         adapter->stats.gprc += er32(GPRC);
3527         adapter->stats.gorcl += er32(GORCL);
3528         adapter->stats.gorch += er32(GORCH);
3529         adapter->stats.bprc += er32(BPRC);
3530         adapter->stats.mprc += er32(MPRC);
3531         adapter->stats.roc += er32(ROC);
3532
3533         if (hw->mac_type != e1000_ich8lan) {
3534                 adapter->stats.prc64 += er32(PRC64);
3535                 adapter->stats.prc127 += er32(PRC127);
3536                 adapter->stats.prc255 += er32(PRC255);
3537                 adapter->stats.prc511 += er32(PRC511);
3538                 adapter->stats.prc1023 += er32(PRC1023);
3539                 adapter->stats.prc1522 += er32(PRC1522);
3540         }
3541
3542         adapter->stats.symerrs += er32(SYMERRS);
3543         adapter->stats.mpc += er32(MPC);
3544         adapter->stats.scc += er32(SCC);
3545         adapter->stats.ecol += er32(ECOL);
3546         adapter->stats.mcc += er32(MCC);
3547         adapter->stats.latecol += er32(LATECOL);
3548         adapter->stats.dc += er32(DC);
3549         adapter->stats.sec += er32(SEC);
3550         adapter->stats.rlec += er32(RLEC);
3551         adapter->stats.xonrxc += er32(XONRXC);
3552         adapter->stats.xontxc += er32(XONTXC);
3553         adapter->stats.xoffrxc += er32(XOFFRXC);
3554         adapter->stats.xofftxc += er32(XOFFTXC);
3555         adapter->stats.fcruc += er32(FCRUC);
3556         adapter->stats.gptc += er32(GPTC);
3557         adapter->stats.gotcl += er32(GOTCL);
3558         adapter->stats.gotch += er32(GOTCH);
3559         adapter->stats.rnbc += er32(RNBC);
3560         adapter->stats.ruc += er32(RUC);
3561         adapter->stats.rfc += er32(RFC);
3562         adapter->stats.rjc += er32(RJC);
3563         adapter->stats.torl += er32(TORL);
3564         adapter->stats.torh += er32(TORH);
3565         adapter->stats.totl += er32(TOTL);
3566         adapter->stats.toth += er32(TOTH);
3567         adapter->stats.tpr += er32(TPR);
3568
3569         if (hw->mac_type != e1000_ich8lan) {
3570                 adapter->stats.ptc64 += er32(PTC64);
3571                 adapter->stats.ptc127 += er32(PTC127);
3572                 adapter->stats.ptc255 += er32(PTC255);
3573                 adapter->stats.ptc511 += er32(PTC511);
3574                 adapter->stats.ptc1023 += er32(PTC1023);
3575                 adapter->stats.ptc1522 += er32(PTC1522);
3576         }
3577
3578         adapter->stats.mptc += er32(MPTC);
3579         adapter->stats.bptc += er32(BPTC);
3580
3581         /* used for adaptive IFS */
3582
3583         hw->tx_packet_delta = er32(TPT);
3584         adapter->stats.tpt += hw->tx_packet_delta;
3585         hw->collision_delta = er32(COLC);
3586         adapter->stats.colc += hw->collision_delta;
3587
3588         if (hw->mac_type >= e1000_82543) {
3589                 adapter->stats.algnerrc += er32(ALGNERRC);
3590                 adapter->stats.rxerrc += er32(RXERRC);
3591                 adapter->stats.tncrs += er32(TNCRS);
3592                 adapter->stats.cexterr += er32(CEXTERR);
3593                 adapter->stats.tsctc += er32(TSCTC);
3594                 adapter->stats.tsctfc += er32(TSCTFC);
3595         }
3596         if (hw->mac_type > e1000_82547_rev_2) {
3597                 adapter->stats.iac += er32(IAC);
3598                 adapter->stats.icrxoc += er32(ICRXOC);
3599
3600                 if (hw->mac_type != e1000_ich8lan) {
3601                         adapter->stats.icrxptc += er32(ICRXPTC);
3602                         adapter->stats.icrxatc += er32(ICRXATC);
3603                         adapter->stats.ictxptc += er32(ICTXPTC);
3604                         adapter->stats.ictxatc += er32(ICTXATC);
3605                         adapter->stats.ictxqec += er32(ICTXQEC);
3606                         adapter->stats.ictxqmtc += er32(ICTXQMTC);
3607                         adapter->stats.icrxdmtc += er32(ICRXDMTC);
3608                 }
3609         }
3610
3611         /* Fill out the OS statistics structure */
3612         adapter->net_stats.multicast = adapter->stats.mprc;
3613         adapter->net_stats.collisions = adapter->stats.colc;
3614
3615         /* Rx Errors */
3616
3617         /* RLEC on some newer hardware can be incorrect so build
3618         * our own version based on RUC and ROC */
3619         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3620                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3621                 adapter->stats.ruc + adapter->stats.roc +
3622                 adapter->stats.cexterr;
3623         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3624         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3625         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3626         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3627         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3628
3629         /* Tx Errors */
3630         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3631         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3632         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3633         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3634         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3635         if (hw->bad_tx_carr_stats_fd &&
3636             adapter->link_duplex == FULL_DUPLEX) {
3637                 adapter->net_stats.tx_carrier_errors = 0;
3638                 adapter->stats.tncrs = 0;
3639         }
3640
3641         /* Tx Dropped needs to be maintained elsewhere */
3642
3643         /* Phy Stats */
3644         if (hw->media_type == e1000_media_type_copper) {
3645                 if ((adapter->link_speed == SPEED_1000) &&
3646                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3647                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3648                         adapter->phy_stats.idle_errors += phy_tmp;
3649                 }
3650
3651                 if ((hw->mac_type <= e1000_82546) &&
3652                    (hw->phy_type == e1000_phy_m88) &&
3653                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3654                         adapter->phy_stats.receive_errors += phy_tmp;
3655         }
3656
3657         /* Management Stats */
3658         if (hw->has_smbus) {
3659                 adapter->stats.mgptc += er32(MGTPTC);
3660                 adapter->stats.mgprc += er32(MGTPRC);
3661                 adapter->stats.mgpdc += er32(MGTPDC);
3662         }
3663
3664         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3665 }
3666
3667 /**
3668  * e1000_intr_msi - Interrupt Handler
3669  * @irq: interrupt number
3670  * @data: pointer to a network interface device structure
3671  **/
3672
3673 static irqreturn_t e1000_intr_msi(int irq, void *data)
3674 {
3675         struct net_device *netdev = data;
3676         struct e1000_adapter *adapter = netdev_priv(netdev);
3677         struct e1000_hw *hw = &adapter->hw;
3678         u32 icr = er32(ICR);
3679
3680         /* in NAPI mode read ICR disables interrupts using IAM */
3681
3682         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3683                 hw->get_link_status = 1;
3684                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3685                  * link down event; disable receives here in the ISR and reset
3686                  * adapter in watchdog */
3687                 if (netif_carrier_ok(netdev) &&
3688                     (hw->mac_type == e1000_80003es2lan)) {
3689                         /* disable receives */
3690                         u32 rctl = er32(RCTL);
3691                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3692                 }
3693                 /* guard against interrupt when we're going down */
3694                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3695                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3696         }
3697
3698         if (likely(napi_schedule_prep(&adapter->napi))) {
3699                 adapter->total_tx_bytes = 0;
3700                 adapter->total_tx_packets = 0;
3701                 adapter->total_rx_bytes = 0;
3702                 adapter->total_rx_packets = 0;
3703                 __napi_schedule(&adapter->napi);
3704         } else
3705                 e1000_irq_enable(adapter);
3706
3707         return IRQ_HANDLED;
3708 }
3709
3710 /**
3711  * e1000_intr - Interrupt Handler
3712  * @irq: interrupt number
3713  * @data: pointer to a network interface device structure
3714  **/
3715
3716 static irqreturn_t e1000_intr(int irq, void *data)
3717 {
3718         struct net_device *netdev = data;
3719         struct e1000_adapter *adapter = netdev_priv(netdev);
3720         struct e1000_hw *hw = &adapter->hw;
3721         u32 rctl, icr = er32(ICR);
3722
3723         if (unlikely((!icr) || test_bit(__E1000_RESETTING, &adapter->flags)))
3724                 return IRQ_NONE;  /* Not our interrupt */
3725
3726         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3727          * not set, then the adapter didn't send an interrupt */
3728         if (unlikely(hw->mac_type >= e1000_82571 &&
3729                      !(icr & E1000_ICR_INT_ASSERTED)))
3730                 return IRQ_NONE;
3731
3732         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3733          * need for the IMC write */
3734
3735         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3736                 hw->get_link_status = 1;
3737                 /* 80003ES2LAN workaround--
3738                  * For packet buffer work-around on link down event;
3739                  * disable receives here in the ISR and
3740                  * reset adapter in watchdog
3741                  */
3742                 if (netif_carrier_ok(netdev) &&
3743                     (hw->mac_type == e1000_80003es2lan)) {
3744                         /* disable receives */
3745                         rctl = er32(RCTL);
3746                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3747                 }
3748                 /* guard against interrupt when we're going down */
3749                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3750                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3751         }
3752
3753         if (unlikely(hw->mac_type < e1000_82571)) {
3754                 /* disable interrupts, without the synchronize_irq bit */
3755                 ew32(IMC, ~0);
3756                 E1000_WRITE_FLUSH();
3757         }
3758         if (likely(napi_schedule_prep(&adapter->napi))) {
3759                 adapter->total_tx_bytes = 0;
3760                 adapter->total_tx_packets = 0;
3761                 adapter->total_rx_bytes = 0;
3762                 adapter->total_rx_packets = 0;
3763                 __napi_schedule(&adapter->napi);
3764         } else {
3765                 /* this really should not happen! if it does it is basically a
3766                  * bug, but not a hard error, so enable ints and continue */
3767                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3768                         e1000_irq_enable(adapter);
3769         }
3770
3771         return IRQ_HANDLED;
3772 }
3773
3774 /**
3775  * e1000_clean - NAPI Rx polling callback
3776  * @adapter: board private structure
3777  **/
3778 static int e1000_clean(struct napi_struct *napi, int budget)
3779 {
3780         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3781         struct net_device *poll_dev = adapter->netdev;
3782         int tx_cleaned = 0, work_done = 0;
3783
3784         adapter = netdev_priv(poll_dev);
3785
3786         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3787
3788         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3789                           &work_done, budget);
3790
3791         if (!tx_cleaned)
3792                 work_done = budget;
3793
3794         /* If budget not fully consumed, exit the polling mode */
3795         if (work_done < budget) {
3796                 if (likely(adapter->itr_setting & 3))
3797                         e1000_set_itr(adapter);
3798                 napi_complete(napi);
3799                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3800                         e1000_irq_enable(adapter);
3801         }
3802
3803         return work_done;
3804 }
3805
3806 /**
3807  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3808  * @adapter: board private structure
3809  **/
3810 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3811                                struct e1000_tx_ring *tx_ring)
3812 {
3813         struct e1000_hw *hw = &adapter->hw;
3814         struct net_device *netdev = adapter->netdev;
3815         struct e1000_tx_desc *tx_desc, *eop_desc;
3816         struct e1000_buffer *buffer_info;
3817         unsigned int i, eop;
3818         unsigned int count = 0;
3819         bool cleaned;
3820         unsigned int total_tx_bytes=0, total_tx_packets=0;
3821
3822         i = tx_ring->next_to_clean;
3823         eop = tx_ring->buffer_info[i].next_to_watch;
3824         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3825
3826         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3827                (count < tx_ring->count)) {
3828                 for (cleaned = false; !cleaned; count++) {
3829                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3830                         buffer_info = &tx_ring->buffer_info[i];
3831                         cleaned = (i == eop);
3832
3833                         if (cleaned) {
3834                                 struct sk_buff *skb = buffer_info->skb;
3835                                 unsigned int segs, bytecount;
3836                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3837                                 /* multiply data chunks by size of headers */
3838                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3839                                             skb->len;
3840                                 total_tx_packets += segs;
3841                                 total_tx_bytes += bytecount;
3842                         }
3843                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3844                         tx_desc->upper.data = 0;
3845
3846                         if (unlikely(++i == tx_ring->count)) i = 0;
3847                 }
3848
3849                 eop = tx_ring->buffer_info[i].next_to_watch;
3850                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3851         }
3852
3853         tx_ring->next_to_clean = i;
3854
3855 #define TX_WAKE_THRESHOLD 32
3856         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3857                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3858                 /* Make sure that anybody stopping the queue after this
3859                  * sees the new next_to_clean.
3860                  */
3861                 smp_mb();
3862                 if (netif_queue_stopped(netdev)) {
3863                         netif_wake_queue(netdev);
3864                         ++adapter->restart_queue;
3865                 }
3866         }
3867
3868         if (adapter->detect_tx_hung) {
3869                 /* Detect a transmit hang in hardware, this serializes the
3870                  * check with the clearing of time_stamp and movement of i */
3871                 adapter->detect_tx_hung = false;
3872                 if (tx_ring->buffer_info[i].time_stamp &&
3873                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
3874                                (adapter->tx_timeout_factor * HZ))
3875                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3876
3877                         /* detected Tx unit hang */
3878                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3879                                         "  Tx Queue             <%lu>\n"
3880                                         "  TDH                  <%x>\n"
3881                                         "  TDT                  <%x>\n"
3882                                         "  next_to_use          <%x>\n"
3883                                         "  next_to_clean        <%x>\n"
3884                                         "buffer_info[next_to_clean]\n"
3885                                         "  time_stamp           <%lx>\n"
3886                                         "  next_to_watch        <%x>\n"
3887                                         "  jiffies              <%lx>\n"
3888                                         "  next_to_watch.status <%x>\n",
3889                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3890                                         sizeof(struct e1000_tx_ring)),
3891                                 readl(hw->hw_addr + tx_ring->tdh),
3892                                 readl(hw->hw_addr + tx_ring->tdt),
3893                                 tx_ring->next_to_use,
3894                                 tx_ring->next_to_clean,
3895                                 tx_ring->buffer_info[i].time_stamp,
3896                                 eop,
3897                                 jiffies,
3898                                 eop_desc->upper.fields.status);
3899                         netif_stop_queue(netdev);
3900                 }
3901         }
3902         adapter->total_tx_bytes += total_tx_bytes;
3903         adapter->total_tx_packets += total_tx_packets;
3904         adapter->net_stats.tx_bytes += total_tx_bytes;
3905         adapter->net_stats.tx_packets += total_tx_packets;
3906         return (count < tx_ring->count);
3907 }
3908
3909 /**
3910  * e1000_rx_checksum - Receive Checksum Offload for 82543
3911  * @adapter:     board private structure
3912  * @status_err:  receive descriptor status and error fields
3913  * @csum:        receive descriptor csum field
3914  * @sk_buff:     socket buffer with received data
3915  **/
3916
3917 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3918                               u32 csum, struct sk_buff *skb)
3919 {
3920         struct e1000_hw *hw = &adapter->hw;
3921         u16 status = (u16)status_err;
3922         u8 errors = (u8)(status_err >> 24);
3923         skb->ip_summed = CHECKSUM_NONE;
3924
3925         /* 82543 or newer only */
3926         if (unlikely(hw->mac_type < e1000_82543)) return;
3927         /* Ignore Checksum bit is set */
3928         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3929         /* TCP/UDP checksum error bit is set */
3930         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3931                 /* let the stack verify checksum errors */
3932                 adapter->hw_csum_err++;
3933                 return;
3934         }
3935         /* TCP/UDP Checksum has not been calculated */
3936         if (hw->mac_type <= e1000_82547_rev_2) {
3937                 if (!(status & E1000_RXD_STAT_TCPCS))
3938                         return;
3939         } else {
3940                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3941                         return;
3942         }
3943         /* It must be a TCP or UDP packet with a valid checksum */
3944         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3945                 /* TCP checksum is good */
3946                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3947         } else if (hw->mac_type > e1000_82547_rev_2) {
3948                 /* IP fragment with UDP payload */
3949                 /* Hardware complements the payload checksum, so we undo it
3950                  * and then put the value in host order for further stack use.
3951                  */
3952                 __sum16 sum = (__force __sum16)htons(csum);
3953                 skb->csum = csum_unfold(~sum);
3954                 skb->ip_summed = CHECKSUM_COMPLETE;
3955         }
3956         adapter->hw_csum_good++;
3957 }
3958
3959 /**
3960  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3961  * @adapter: board private structure
3962  **/
3963 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3964                                struct e1000_rx_ring *rx_ring,
3965                                int *work_done, int work_to_do)
3966 {
3967         struct e1000_hw *hw = &adapter->hw;
3968         struct net_device *netdev = adapter->netdev;
3969         struct pci_dev *pdev = adapter->pdev;
3970         struct e1000_rx_desc *rx_desc, *next_rxd;
3971         struct e1000_buffer *buffer_info, *next_buffer;
3972         unsigned long flags;
3973         u32 length;
3974         u8 last_byte;
3975         unsigned int i;
3976         int cleaned_count = 0;
3977         bool cleaned = false;
3978         unsigned int total_rx_bytes=0, total_rx_packets=0;
3979
3980         i = rx_ring->next_to_clean;
3981         rx_desc = E1000_RX_DESC(*rx_ring, i);
3982         buffer_info = &rx_ring->buffer_info[i];
3983
3984         while (rx_desc->status & E1000_RXD_STAT_DD) {
3985                 struct sk_buff *skb;
3986                 u8 status;
3987
3988                 if (*work_done >= work_to_do)
3989                         break;
3990                 (*work_done)++;
3991
3992                 status = rx_desc->status;
3993                 skb = buffer_info->skb;
3994                 buffer_info->skb = NULL;
3995
3996                 prefetch(skb->data - NET_IP_ALIGN);
3997
3998                 if (++i == rx_ring->count) i = 0;
3999                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4000                 prefetch(next_rxd);
4001
4002                 next_buffer = &rx_ring->buffer_info[i];
4003
4004                 cleaned = true;
4005                 cleaned_count++;
4006                 pci_unmap_single(pdev,
4007                                  buffer_info->dma,
4008                                  buffer_info->length,
4009                                  PCI_DMA_FROMDEVICE);
4010
4011                 length = le16_to_cpu(rx_desc->length);
4012
4013                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4014                         /* All receives must fit into a single buffer */
4015                         E1000_DBG("%s: Receive packet consumed multiple"
4016                                   " buffers\n", netdev->name);
4017                         /* recycle */
4018                         buffer_info->skb = skb;
4019                         goto next_desc;
4020                 }
4021
4022                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4023                         last_byte = *(skb->data + length - 1);
4024                         if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4025                                        last_byte)) {
4026                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4027                                 e1000_tbi_adjust_stats(hw, &adapter->stats,
4028                                                        length, skb->data);
4029                                 spin_unlock_irqrestore(&adapter->stats_lock,
4030                                                        flags);
4031                                 length--;
4032                         } else {
4033                                 /* recycle */
4034                                 buffer_info->skb = skb;
4035                                 goto next_desc;
4036                         }
4037                 }
4038
4039                 /* adjust length to remove Ethernet CRC, this must be
4040                  * done after the TBI_ACCEPT workaround above */
4041                 length -= 4;
4042
4043                 /* probably a little skewed due to removing CRC */
4044                 total_rx_bytes += length;
4045                 total_rx_packets++;
4046
4047                 /* code added for copybreak, this should improve
4048                  * performance for small packets with large amounts
4049                  * of reassembly being done in the stack */
4050                 if (length < copybreak) {
4051                         struct sk_buff *new_skb =
4052                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4053                         if (new_skb) {
4054                                 skb_reserve(new_skb, NET_IP_ALIGN);
4055                                 skb_copy_to_linear_data_offset(new_skb,
4056                                                                -NET_IP_ALIGN,
4057                                                                (skb->data -
4058                                                                 NET_IP_ALIGN),
4059                                                                (length +
4060                                                                 NET_IP_ALIGN));
4061                                 /* save the skb in buffer_info as good */
4062                                 buffer_info->skb = skb;
4063                                 skb = new_skb;
4064                         }
4065                         /* else just continue with the old one */
4066                 }
4067                 /* end copybreak code */
4068                 skb_put(skb, length);
4069
4070                 /* Receive Checksum Offload */
4071                 e1000_rx_checksum(adapter,
4072                                   (u32)(status) |
4073                                   ((u32)(rx_desc->errors) << 24),
4074                                   le16_to_cpu(rx_desc->csum), skb);
4075
4076                 skb->protocol = eth_type_trans(skb, netdev);
4077
4078                 if (unlikely(adapter->vlgrp &&
4079                             (status & E1000_RXD_STAT_VP))) {
4080                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4081                                                  le16_to_cpu(rx_desc->special));
4082                 } else {
4083                         netif_receive_skb(skb);
4084                 }
4085
4086 next_desc:
4087                 rx_desc->status = 0;
4088
4089                 /* return some buffers to hardware, one at a time is too slow */
4090                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4091                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4092                         cleaned_count = 0;
4093                 }
4094
4095                 /* use prefetched values */
4096                 rx_desc = next_rxd;
4097                 buffer_info = next_buffer;
4098         }
4099         rx_ring->next_to_clean = i;
4100
4101         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4102         if (cleaned_count)
4103                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4104
4105         adapter->total_rx_packets += total_rx_packets;
4106         adapter->total_rx_bytes += total_rx_bytes;
4107         adapter->net_stats.rx_bytes += total_rx_bytes;
4108         adapter->net_stats.rx_packets += total_rx_packets;
4109         return cleaned;
4110 }
4111
4112 /**
4113  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4114  * @adapter: address of board private structure
4115  **/
4116
4117 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4118                                    struct e1000_rx_ring *rx_ring,
4119                                    int cleaned_count)
4120 {
4121         struct e1000_hw *hw = &adapter->hw;
4122         struct net_device *netdev = adapter->netdev;
4123         struct pci_dev *pdev = adapter->pdev;
4124         struct e1000_rx_desc *rx_desc;
4125         struct e1000_buffer *buffer_info;
4126         struct sk_buff *skb;
4127         unsigned int i;
4128         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4129
4130         i = rx_ring->next_to_use;
4131         buffer_info = &rx_ring->buffer_info[i];
4132
4133         while (cleaned_count--) {
4134                 skb = buffer_info->skb;
4135                 if (skb) {
4136                         skb_trim(skb, 0);
4137                         goto map_skb;
4138                 }
4139
4140                 skb = netdev_alloc_skb(netdev, bufsz);
4141                 if (unlikely(!skb)) {
4142                         /* Better luck next round */
4143                         adapter->alloc_rx_buff_failed++;
4144                         break;
4145                 }
4146
4147                 /* Fix for errata 23, can't cross 64kB boundary */
4148                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4149                         struct sk_buff *oldskb = skb;
4150                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4151                                              "at %p\n", bufsz, skb->data);
4152                         /* Try again, without freeing the previous */
4153                         skb = netdev_alloc_skb(netdev, bufsz);
4154                         /* Failed allocation, critical failure */
4155                         if (!skb) {
4156                                 dev_kfree_skb(oldskb);
4157                                 break;
4158                         }
4159
4160                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4161                                 /* give up */
4162                                 dev_kfree_skb(skb);
4163                                 dev_kfree_skb(oldskb);
4164                                 break; /* while !buffer_info->skb */
4165                         }
4166
4167                         /* Use new allocation */
4168                         dev_kfree_skb(oldskb);
4169                 }
4170                 /* Make buffer alignment 2 beyond a 16 byte boundary
4171                  * this will result in a 16 byte aligned IP header after
4172                  * the 14 byte MAC header is removed
4173                  */
4174                 skb_reserve(skb, NET_IP_ALIGN);
4175
4176                 buffer_info->skb = skb;
4177                 buffer_info->length = adapter->rx_buffer_len;
4178 map_skb:
4179                 buffer_info->dma = pci_map_single(pdev,
4180                                                   skb->data,
4181                                                   adapter->rx_buffer_len,
4182                                                   PCI_DMA_FROMDEVICE);
4183
4184                 /* Fix for errata 23, can't cross 64kB boundary */
4185                 if (!e1000_check_64k_bound(adapter,
4186                                         (void *)(unsigned long)buffer_info->dma,
4187                                         adapter->rx_buffer_len)) {
4188                         DPRINTK(RX_ERR, ERR,
4189                                 "dma align check failed: %u bytes at %p\n",
4190                                 adapter->rx_buffer_len,
4191                                 (void *)(unsigned long)buffer_info->dma);
4192                         dev_kfree_skb(skb);
4193                         buffer_info->skb = NULL;
4194
4195                         pci_unmap_single(pdev, buffer_info->dma,
4196                                          adapter->rx_buffer_len,
4197                                          PCI_DMA_FROMDEVICE);
4198
4199                         break; /* while !buffer_info->skb */
4200                 }
4201                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4202                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4203
4204                 if (unlikely(++i == rx_ring->count))
4205                         i = 0;
4206                 buffer_info = &rx_ring->buffer_info[i];
4207         }
4208
4209         if (likely(rx_ring->next_to_use != i)) {
4210                 rx_ring->next_to_use = i;
4211                 if (unlikely(i-- == 0))
4212                         i = (rx_ring->count - 1);
4213
4214                 /* Force memory writes to complete before letting h/w
4215                  * know there are new descriptors to fetch.  (Only
4216                  * applicable for weak-ordered memory model archs,
4217                  * such as IA-64). */
4218                 wmb();
4219                 writel(i, hw->hw_addr + rx_ring->rdt);
4220         }
4221 }
4222
4223 /**
4224  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4225  * @adapter:
4226  **/
4227
4228 static void e1000_smartspeed(struct e1000_adapter *adapter)
4229 {
4230         struct e1000_hw *hw = &adapter->hw;
4231         u16 phy_status;
4232         u16 phy_ctrl;
4233
4234         if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4235            !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4236                 return;
4237
4238         if (adapter->smartspeed == 0) {
4239                 /* If Master/Slave config fault is asserted twice,
4240                  * we assume back-to-back */
4241                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4242                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4243                 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4244                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4245                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4246                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4247                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4248                         e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4249                                             phy_ctrl);
4250                         adapter->smartspeed++;
4251                         if (!e1000_phy_setup_autoneg(hw) &&
4252                            !e1000_read_phy_reg(hw, PHY_CTRL,
4253                                                &phy_ctrl)) {
4254                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4255                                              MII_CR_RESTART_AUTO_NEG);
4256                                 e1000_write_phy_reg(hw, PHY_CTRL,
4257                                                     phy_ctrl);
4258                         }
4259                 }
4260                 return;
4261         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4262                 /* If still no link, perhaps using 2/3 pair cable */
4263                 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4264                 phy_ctrl |= CR_1000T_MS_ENABLE;
4265                 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4266                 if (!e1000_phy_setup_autoneg(hw) &&
4267                    !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4268                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4269                                      MII_CR_RESTART_AUTO_NEG);
4270                         e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4271                 }
4272         }
4273         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4274         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4275                 adapter->smartspeed = 0;
4276 }
4277
4278 /**
4279  * e1000_ioctl -
4280  * @netdev:
4281  * @ifreq:
4282  * @cmd:
4283  **/
4284
4285 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4286 {
4287         switch (cmd) {
4288         case SIOCGMIIPHY:
4289         case SIOCGMIIREG:
4290         case SIOCSMIIREG:
4291                 return e1000_mii_ioctl(netdev, ifr, cmd);
4292         default:
4293                 return -EOPNOTSUPP;
4294         }
4295 }
4296
4297 /**
4298  * e1000_mii_ioctl -
4299  * @netdev:
4300  * @ifreq:
4301  * @cmd:
4302  **/
4303
4304 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4305                            int cmd)
4306 {
4307         struct e1000_adapter *adapter = netdev_priv(netdev);
4308         struct e1000_hw *hw = &adapter->hw;
4309         struct mii_ioctl_data *data = if_mii(ifr);
4310         int retval;
4311         u16 mii_reg;
4312         u16 spddplx;
4313         unsigned long flags;
4314
4315         if (hw->media_type != e1000_media_type_copper)
4316                 return -EOPNOTSUPP;
4317
4318         switch (cmd) {
4319         case SIOCGMIIPHY:
4320                 data->phy_id = hw->phy_addr;
4321                 break;
4322         case SIOCGMIIREG:
4323                 if (!capable(CAP_NET_ADMIN))
4324                         return -EPERM;
4325                 spin_lock_irqsave(&adapter->stats_lock, flags);
4326                 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4327                                    &data->val_out)) {
4328                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4329                         return -EIO;
4330                 }
4331                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4332                 break;
4333         case SIOCSMIIREG:
4334                 if (!capable(CAP_NET_ADMIN))
4335                         return -EPERM;
4336                 if (data->reg_num & ~(0x1F))
4337                         return -EFAULT;
4338                 mii_reg = data->val_in;
4339                 spin_lock_irqsave(&adapter->stats_lock, flags);
4340                 if (e1000_write_phy_reg(hw, data->reg_num,
4341                                         mii_reg)) {
4342                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4343                         return -EIO;
4344                 }
4345                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4346                 if (hw->media_type == e1000_media_type_copper) {
4347                         switch (data->reg_num) {
4348                         case PHY_CTRL:
4349                                 if (mii_reg & MII_CR_POWER_DOWN)
4350                                         break;
4351                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4352                                         hw->autoneg = 1;
4353                                         hw->autoneg_advertised = 0x2F;
4354                                 } else {
4355                                         if (mii_reg & 0x40)
4356                                                 spddplx = SPEED_1000;
4357                                         else if (mii_reg & 0x2000)
4358                                                 spddplx = SPEED_100;
4359                                         else
4360                                                 spddplx = SPEED_10;
4361                                         spddplx += (mii_reg & 0x100)
4362                                                    ? DUPLEX_FULL :
4363                                                    DUPLEX_HALF;
4364                                         retval = e1000_set_spd_dplx(adapter,
4365                                                                     spddplx);
4366                                         if (retval)
4367                                                 return retval;
4368                                 }
4369                                 if (netif_running(adapter->netdev))
4370                                         e1000_reinit_locked(adapter);
4371                                 else
4372                                         e1000_reset(adapter);
4373                                 break;
4374                         case M88E1000_PHY_SPEC_CTRL:
4375                         case M88E1000_EXT_PHY_SPEC_CTRL:
4376                                 if (e1000_phy_reset(hw))
4377                                         return -EIO;
4378                                 break;
4379                         }
4380                 } else {
4381                         switch (data->reg_num) {
4382                         case PHY_CTRL:
4383                                 if (mii_reg & MII_CR_POWER_DOWN)
4384                                         break;
4385                                 if (netif_running(adapter->netdev))
4386                                         e1000_reinit_locked(adapter);
4387                                 else
4388                                         e1000_reset(adapter);
4389                                 break;
4390                         }
4391                 }
4392                 break;
4393         default:
4394                 return -EOPNOTSUPP;
4395         }
4396         return E1000_SUCCESS;
4397 }
4398
4399 void e1000_pci_set_mwi(struct e1000_hw *hw)
4400 {
4401         struct e1000_adapter *adapter = hw->back;
4402         int ret_val = pci_set_mwi(adapter->pdev);
4403
4404         if (ret_val)
4405                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4406 }
4407
4408 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4409 {
4410         struct e1000_adapter *adapter = hw->back;
4411
4412         pci_clear_mwi(adapter->pdev);
4413 }
4414
4415 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4416 {
4417         struct e1000_adapter *adapter = hw->back;
4418         return pcix_get_mmrbc(adapter->pdev);
4419 }
4420
4421 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4422 {
4423         struct e1000_adapter *adapter = hw->back;
4424         pcix_set_mmrbc(adapter->pdev, mmrbc);
4425 }
4426
4427 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4428 {
4429     struct e1000_adapter *adapter = hw->back;
4430     u16 cap_offset;
4431
4432     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4433     if (!cap_offset)
4434         return -E1000_ERR_CONFIG;
4435
4436     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4437
4438     return E1000_SUCCESS;
4439 }
4440
4441 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4442 {
4443         outl(value, port);
4444 }
4445
4446 static void e1000_vlan_rx_register(struct net_device *netdev,
4447                                    struct vlan_group *grp)
4448 {
4449         struct e1000_adapter *adapter = netdev_priv(netdev);
4450         struct e1000_hw *hw = &adapter->hw;
4451         u32 ctrl, rctl;
4452
4453         if (!test_bit(__E1000_DOWN, &adapter->flags))
4454                 e1000_irq_disable(adapter);
4455         adapter->vlgrp = grp;
4456
4457         if (grp) {
4458                 /* enable VLAN tag insert/strip */
4459                 ctrl = er32(CTRL);
4460                 ctrl |= E1000_CTRL_VME;
4461                 ew32(CTRL, ctrl);
4462
4463                 if (adapter->hw.mac_type != e1000_ich8lan) {
4464                         /* enable VLAN receive filtering */
4465                         rctl = er32(RCTL);
4466                         rctl &= ~E1000_RCTL_CFIEN;
4467                         ew32(RCTL, rctl);
4468                         e1000_update_mng_vlan(adapter);
4469                 }
4470         } else {
4471                 /* disable VLAN tag insert/strip */
4472                 ctrl = er32(CTRL);
4473                 ctrl &= ~E1000_CTRL_VME;
4474                 ew32(CTRL, ctrl);
4475
4476                 if (adapter->hw.mac_type != e1000_ich8lan) {
4477                         if (adapter->mng_vlan_id !=
4478                             (u16)E1000_MNG_VLAN_NONE) {
4479                                 e1000_vlan_rx_kill_vid(netdev,
4480                                                        adapter->mng_vlan_id);
4481                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4482                         }
4483                 }
4484         }
4485
4486         if (!test_bit(__E1000_DOWN, &adapter->flags))
4487                 e1000_irq_enable(adapter);
4488 }
4489
4490 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4491 {
4492         struct e1000_adapter *adapter = netdev_priv(netdev);
4493         struct e1000_hw *hw = &adapter->hw;
4494         u32 vfta, index;
4495
4496         if ((hw->mng_cookie.status &
4497              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4498             (vid == adapter->mng_vlan_id))
4499                 return;
4500         /* add VID to filter table */
4501         index = (vid >> 5) & 0x7F;
4502         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4503         vfta |= (1 << (vid & 0x1F));
4504         e1000_write_vfta(hw, index, vfta);
4505 }
4506
4507 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4508 {
4509         struct e1000_adapter *adapter = netdev_priv(netdev);
4510         struct e1000_hw *hw = &adapter->hw;
4511         u32 vfta, index;
4512
4513         if (!test_bit(__E1000_DOWN, &adapter->flags))
4514                 e1000_irq_disable(adapter);
4515         vlan_group_set_device(adapter->vlgrp, vid, NULL);
4516         if (!test_bit(__E1000_DOWN, &adapter->flags))
4517                 e1000_irq_enable(adapter);
4518
4519         if ((hw->mng_cookie.status &
4520              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4521             (vid == adapter->mng_vlan_id)) {
4522                 /* release control to f/w */
4523                 e1000_release_hw_control(adapter);
4524                 return;
4525         }
4526
4527         /* remove VID from filter table */
4528         index = (vid >> 5) & 0x7F;
4529         vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4530         vfta &= ~(1 << (vid & 0x1F));
4531         e1000_write_vfta(hw, index, vfta);
4532 }
4533
4534 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4535 {
4536         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4537
4538         if (adapter->vlgrp) {
4539                 u16 vid;
4540                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4541                         if (!vlan_group_get_device(adapter->vlgrp, vid))
4542                                 continue;
4543                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4544                 }
4545         }
4546 }
4547
4548 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4549 {
4550         struct e1000_hw *hw = &adapter->hw;
4551
4552         hw->autoneg = 0;
4553
4554         /* Fiber NICs only allow 1000 gbps Full duplex */
4555         if ((hw->media_type == e1000_media_type_fiber) &&
4556                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4557                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4558                 return -EINVAL;
4559         }
4560
4561         switch (spddplx) {
4562         case SPEED_10 + DUPLEX_HALF:
4563                 hw->forced_speed_duplex = e1000_10_half;
4564                 break;
4565         case SPEED_10 + DUPLEX_FULL:
4566                 hw->forced_speed_duplex = e1000_10_full;
4567                 break;
4568         case SPEED_100 + DUPLEX_HALF:
4569                 hw->forced_speed_duplex = e1000_100_half;
4570                 break;
4571         case SPEED_100 + DUPLEX_FULL:
4572                 hw->forced_speed_duplex = e1000_100_full;
4573                 break;
4574         case SPEED_1000 + DUPLEX_FULL:
4575                 hw->autoneg = 1;
4576                 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4577                 break;
4578         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4579         default:
4580                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4581                 return -EINVAL;
4582         }
4583         return 0;
4584 }
4585
4586 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4587 {
4588         struct net_device *netdev = pci_get_drvdata(pdev);
4589         struct e1000_adapter *adapter = netdev_priv(netdev);
4590         struct e1000_hw *hw = &adapter->hw;
4591         u32 ctrl, ctrl_ext, rctl, status;
4592         u32 wufc = adapter->wol;
4593 #ifdef CONFIG_PM
4594         int retval = 0;
4595 #endif
4596
4597         netif_device_detach(netdev);
4598
4599         if (netif_running(netdev)) {
4600                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4601                 e1000_down(adapter);
4602         }
4603
4604 #ifdef CONFIG_PM
4605         retval = pci_save_state(pdev);
4606         if (retval)
4607                 return retval;
4608 #endif
4609
4610         status = er32(STATUS);
4611         if (status & E1000_STATUS_LU)
4612                 wufc &= ~E1000_WUFC_LNKC;
4613
4614         if (wufc) {
4615                 e1000_setup_rctl(adapter);
4616                 e1000_set_rx_mode(netdev);
4617
4618                 /* turn on all-multi mode if wake on multicast is enabled */
4619                 if (wufc & E1000_WUFC_MC) {
4620                         rctl = er32(RCTL);
4621                         rctl |= E1000_RCTL_MPE;
4622                         ew32(RCTL, rctl);
4623                 }
4624
4625                 if (hw->mac_type >= e1000_82540) {
4626                         ctrl = er32(CTRL);
4627                         /* advertise wake from D3Cold */
4628                         #define E1000_CTRL_ADVD3WUC 0x00100000
4629                         /* phy power management enable */
4630                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4631                         ctrl |= E1000_CTRL_ADVD3WUC |
4632                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4633                         ew32(CTRL, ctrl);
4634                 }
4635
4636                 if (hw->media_type == e1000_media_type_fiber ||
4637                    hw->media_type == e1000_media_type_internal_serdes) {
4638                         /* keep the laser running in D3 */
4639                         ctrl_ext = er32(CTRL_EXT);
4640                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4641                         ew32(CTRL_EXT, ctrl_ext);
4642                 }
4643
4644                 /* Allow time for pending master requests to run */
4645                 e1000_disable_pciex_master(hw);
4646
4647                 ew32(WUC, E1000_WUC_PME_EN);
4648                 ew32(WUFC, wufc);
4649                 pci_enable_wake(pdev, PCI_D3hot, 1);
4650                 pci_enable_wake(pdev, PCI_D3cold, 1);
4651         } else {
4652                 ew32(WUC, 0);
4653                 ew32(WUFC, 0);
4654                 pci_enable_wake(pdev, PCI_D3hot, 0);
4655                 pci_enable_wake(pdev, PCI_D3cold, 0);
4656         }
4657
4658         e1000_release_manageability(adapter);
4659
4660         /* make sure adapter isn't asleep if manageability is enabled */
4661         if (adapter->en_mng_pt) {
4662                 pci_enable_wake(pdev, PCI_D3hot, 1);
4663                 pci_enable_wake(pdev, PCI_D3cold, 1);
4664         }
4665
4666         if (hw->phy_type == e1000_phy_igp_3)
4667                 e1000_phy_powerdown_workaround(hw);
4668
4669         if (netif_running(netdev))
4670                 e1000_free_irq(adapter);
4671
4672         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4673          * would have already happened in close and is redundant. */
4674         e1000_release_hw_control(adapter);
4675
4676         pci_disable_device(pdev);
4677
4678         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4679
4680         return 0;
4681 }
4682
4683 #ifdef CONFIG_PM
4684 static int e1000_resume(struct pci_dev *pdev)
4685 {
4686         struct net_device *netdev = pci_get_drvdata(pdev);
4687         struct e1000_adapter *adapter = netdev_priv(netdev);
4688         struct e1000_hw *hw = &adapter->hw;
4689         u32 err;
4690
4691         pci_set_power_state(pdev, PCI_D0);
4692         pci_restore_state(pdev);
4693
4694         if (adapter->need_ioport)
4695                 err = pci_enable_device(pdev);
4696         else
4697                 err = pci_enable_device_mem(pdev);
4698         if (err) {
4699                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4700                 return err;
4701         }
4702         pci_set_master(pdev);
4703
4704         pci_enable_wake(pdev, PCI_D3hot, 0);
4705         pci_enable_wake(pdev, PCI_D3cold, 0);
4706
4707         if (netif_running(netdev)) {
4708                 err = e1000_request_irq(adapter);
4709                 if (err)
4710                         return err;
4711         }
4712
4713         e1000_power_up_phy(adapter);
4714         e1000_reset(adapter);
4715         ew32(WUS, ~0);
4716
4717         e1000_init_manageability(adapter);
4718
4719         if (netif_running(netdev))
4720                 e1000_up(adapter);
4721
4722         netif_device_attach(netdev);
4723
4724         /* If the controller is 82573 and f/w is AMT, do not set
4725          * DRV_LOAD until the interface is up.  For all other cases,
4726          * let the f/w know that the h/w is now under the control
4727          * of the driver. */
4728         if (hw->mac_type != e1000_82573 ||
4729             !e1000_check_mng_mode(hw))
4730                 e1000_get_hw_control(adapter);
4731
4732         return 0;
4733 }
4734 #endif
4735
4736 static void e1000_shutdown(struct pci_dev *pdev)
4737 {
4738         e1000_suspend(pdev, PMSG_SUSPEND);
4739 }
4740
4741 #ifdef CONFIG_NET_POLL_CONTROLLER
4742 /*
4743  * Polling 'interrupt' - used by things like netconsole to send skbs
4744  * without having to re-enable interrupts. It's not called while
4745  * the interrupt routine is executing.
4746  */
4747 static void e1000_netpoll(struct net_device *netdev)
4748 {
4749         struct e1000_adapter *adapter = netdev_priv(netdev);
4750
4751         disable_irq(adapter->pdev->irq);
4752         e1000_intr(adapter->pdev->irq, netdev);
4753         enable_irq(adapter->pdev->irq);
4754 }
4755 #endif
4756
4757 /**
4758  * e1000_io_error_detected - called when PCI error is detected
4759  * @pdev: Pointer to PCI device
4760  * @state: The current pci conneection state
4761  *
4762  * This function is called after a PCI bus error affecting
4763  * this device has been detected.
4764  */
4765 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4766                                                 pci_channel_state_t state)
4767 {
4768         struct net_device *netdev = pci_get_drvdata(pdev);
4769         struct e1000_adapter *adapter = netdev_priv(netdev);
4770
4771         netif_device_detach(netdev);
4772
4773         if (netif_running(netdev))
4774                 e1000_down(adapter);
4775         pci_disable_device(pdev);
4776
4777         /* Request a slot slot reset. */
4778         return PCI_ERS_RESULT_NEED_RESET;
4779 }
4780
4781 /**
4782  * e1000_io_slot_reset - called after the pci bus has been reset.
4783  * @pdev: Pointer to PCI device
4784  *
4785  * Restart the card from scratch, as if from a cold-boot. Implementation
4786  * resembles the first-half of the e1000_resume routine.
4787  */
4788 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4789 {
4790         struct net_device *netdev = pci_get_drvdata(pdev);
4791         struct e1000_adapter *adapter = netdev_priv(netdev);
4792         struct e1000_hw *hw = &adapter->hw;
4793         int err;
4794
4795         if (adapter->need_ioport)
4796                 err = pci_enable_device(pdev);
4797         else
4798                 err = pci_enable_device_mem(pdev);
4799         if (err) {
4800                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4801                 return PCI_ERS_RESULT_DISCONNECT;
4802         }
4803         pci_set_master(pdev);
4804
4805         pci_enable_wake(pdev, PCI_D3hot, 0);
4806         pci_enable_wake(pdev, PCI_D3cold, 0);
4807
4808         e1000_reset(adapter);
4809         ew32(WUS, ~0);
4810
4811         return PCI_ERS_RESULT_RECOVERED;
4812 }
4813
4814 /**
4815  * e1000_io_resume - called when traffic can start flowing again.
4816  * @pdev: Pointer to PCI device
4817  *
4818  * This callback is called when the error recovery driver tells us that
4819  * its OK to resume normal operation. Implementation resembles the
4820  * second-half of the e1000_resume routine.
4821  */
4822 static void e1000_io_resume(struct pci_dev *pdev)
4823 {
4824         struct net_device *netdev = pci_get_drvdata(pdev);
4825         struct e1000_adapter *adapter = netdev_priv(netdev);
4826         struct e1000_hw *hw = &adapter->hw;
4827
4828         e1000_init_manageability(adapter);
4829
4830         if (netif_running(netdev)) {
4831                 if (e1000_up(adapter)) {
4832                         printk("e1000: can't bring device back up after reset\n");
4833                         return;
4834                 }
4835         }
4836
4837         netif_device_attach(netdev);
4838
4839         /* If the controller is 82573 and f/w is AMT, do not set
4840          * DRV_LOAD until the interface is up.  For all other cases,
4841          * let the f/w know that the h/w is now under the control
4842          * of the driver. */
4843         if (hw->mac_type != e1000_82573 ||
4844             !e1000_check_mng_mode(hw))
4845                 e1000_get_hw_control(adapter);
4846
4847 }
4848
4849 /* e1000_main.c */