drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  26   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27
  28 *******************************************************************************/
  29
  30 #include "e1000.h"
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #ifndef CONFIG_E1000_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION "7.1.9-k2"DRIVERNAPI
  40 char e1000_driver_version[] = DRV_VERSION;
  41 static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  42
  43 /* e1000_pci_tbl - PCI Device ID Table
  44  *
  45  * Last entry must be all 0s
  46  *
  47  * Macro expands to...
  48  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  49  */
  50 static struct pci_device_id e1000_pci_tbl[] = {
  51         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  52         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  53         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  54         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  55         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  56         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  57         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  58         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  59         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  70         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  71         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  72         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1049),
  77         INTEL_E1000_ETHERNET_DEVICE(0x104A),
  78         INTEL_E1000_ETHERNET_DEVICE(0x104B),
  79         INTEL_E1000_ETHERNET_DEVICE(0x104C),
  80         INTEL_E1000_ETHERNET_DEVICE(0x104D),
  81         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  82         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  88         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  89         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  90         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  94         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  95         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  96         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  97         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  98         INTEL_E1000_ETHERNET_DEVICE(0x1096),
  99         INTEL_E1000_ETHERNET_DEVICE(0x1098),
 100         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 101         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 102         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 103         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 104         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
 105         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
 106         /* required last entry */
 107         {0,}
 108 };
 109
 110 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 111
 112 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 113                                     struct e1000_tx_ring *txdr);
 114 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 115                                     struct e1000_rx_ring *rxdr);
 116 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 117                                     struct e1000_tx_ring *tx_ring);
 118 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 119                                     struct e1000_rx_ring *rx_ring);
 120
 121 /* Local Function Prototypes */
 122
 123 static int e1000_init_module(void);
 124 static void e1000_exit_module(void);
 125 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 126 static void __devexit e1000_remove(struct pci_dev *pdev);
 127 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 128 static int e1000_sw_init(struct e1000_adapter *adapter);
 129 static int e1000_open(struct net_device *netdev);
 130 static int e1000_close(struct net_device *netdev);
 131 static void e1000_configure_tx(struct e1000_adapter *adapter);
 132 static void e1000_configure_rx(struct e1000_adapter *adapter);
 133 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 134 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 135 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 136 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 137                                 struct e1000_tx_ring *tx_ring);
 138 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 139                                 struct e1000_rx_ring *rx_ring);
 140 static void e1000_set_multi(struct net_device *netdev);
 141 static void e1000_update_phy_info(unsigned long data);
 142 static void e1000_watchdog(unsigned long data);
 143 static void e1000_82547_tx_fifo_stall(unsigned long data);
 144 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 145 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 146 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 147 static int e1000_set_mac(struct net_device *netdev, void *p);
 148 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 149 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 150                                     struct e1000_tx_ring *tx_ring);
 151 #ifdef CONFIG_E1000_NAPI
 152 static int e1000_clean(struct net_device *poll_dev, int *budget);
 153 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 154                                     struct e1000_rx_ring *rx_ring,
 155                                     int *work_done, int work_to_do);
 156 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 157                                        struct e1000_rx_ring *rx_ring,
 158                                        int *work_done, int work_to_do);
 159 #else
 160 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 161                                     struct e1000_rx_ring *rx_ring);
 162 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 163                                        struct e1000_rx_ring *rx_ring);
 164 #endif
 165 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 166                                    struct e1000_rx_ring *rx_ring,
 167                                    int cleaned_count);
 168 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 169                                       struct e1000_rx_ring *rx_ring,
 170                                       int cleaned_count);
 171 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 172 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 173                            int cmd);
 174 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 175 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 176 static void e1000_tx_timeout(struct net_device *dev);
 177 static void e1000_reset_task(struct net_device *dev);
 178 static void e1000_smartspeed(struct e1000_adapter *adapter);
 179 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 180                                        struct sk_buff *skb);
 181
 182 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 183 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 184 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 185 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 186
 187 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 188 #ifdef CONFIG_PM
 189 static int e1000_resume(struct pci_dev *pdev);
 190 #endif
 191 static void e1000_shutdown(struct pci_dev *pdev);
 192
 193 #ifdef CONFIG_NET_POLL_CONTROLLER
 194 /* for netdump / net console */
 195 static void e1000_netpoll (struct net_device *netdev);
 196 #endif
 197
 198 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 199                      pci_channel_state_t state);
 200 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 201 static void e1000_io_resume(struct pci_dev *pdev);
 202
 203 static struct pci_error_handlers e1000_err_handler = {
 204         .error_detected = e1000_io_error_detected,
 205         .slot_reset = e1000_io_slot_reset,
 206         .resume = e1000_io_resume,
 207 };
 208
 209 static struct pci_driver e1000_driver = {
 210         .name     = e1000_driver_name,
 211         .id_table = e1000_pci_tbl,
 212         .probe    = e1000_probe,
 213         .remove   = __devexit_p(e1000_remove),
 214         /* Power Managment Hooks */
 215         .suspend  = e1000_suspend,
 216 #ifdef CONFIG_PM
 217         .resume   = e1000_resume,
 218 #endif
 219         .shutdown = e1000_shutdown,
 220         .err_handler = &e1000_err_handler
 221 };
 222
 223 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 224 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 225 MODULE_LICENSE("GPL");
 226 MODULE_VERSION(DRV_VERSION);
 227
 228 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 229 module_param(debug, int, 0);
 230 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 231
 232 /**
 233  * e1000_init_module - Driver Registration Routine
 234  *
 235  * e1000_init_module is the first routine called when the driver is
 236  * loaded. All it does is register with the PCI subsystem.
 237  **/
 238
 239 static int __init
 240 e1000_init_module(void)
 241 {
 242         int ret;
 243         printk(KERN_INFO "%s - version %s\n",
 244                e1000_driver_string, e1000_driver_version);
 245
 246         printk(KERN_INFO "%s\n", e1000_copyright);
 247
 248         ret = pci_module_init(&e1000_driver);
 249
 250         return ret;
 251 }
 252
 253 module_init(e1000_init_module);
 254
 255 /**
 256  * e1000_exit_module - Driver Exit Cleanup Routine
 257  *
 258  * e1000_exit_module is called just before the driver is removed
 259  * from memory.
 260  **/
 261
 262 static void __exit
 263 e1000_exit_module(void)
 264 {
 265         pci_unregister_driver(&e1000_driver);
 266 }
 267
 268 module_exit(e1000_exit_module);
 269
 270 static int e1000_request_irq(struct e1000_adapter *adapter)
 271 {
 272         struct net_device *netdev = adapter->netdev;
 273         int flags, err = 0;
 274
 275         flags = SA_SHIRQ | SA_SAMPLE_RANDOM;
 276 #ifdef CONFIG_PCI_MSI
 277         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 278                 adapter->have_msi = TRUE;
 279                 if ((err = pci_enable_msi(adapter->pdev))) {
 280                         DPRINTK(PROBE, ERR,
 281                          "Unable to allocate MSI interrupt Error: %d\n", err);
 282                         adapter->have_msi = FALSE;
 283                 }
 284         }
 285         if (adapter->have_msi)
 286                 flags &= ~SA_SHIRQ;
 287 #endif
 288         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 289                                netdev->name, netdev)))
 290                 DPRINTK(PROBE, ERR,
 291                         "Unable to allocate interrupt Error: %d\n", err);
 292
 293         return err;
 294 }
 295
 296 static void e1000_free_irq(struct e1000_adapter *adapter)
 297 {
 298         struct net_device *netdev = adapter->netdev;
 299
 300         free_irq(adapter->pdev->irq, netdev);
 301
 302 #ifdef CONFIG_PCI_MSI
 303         if (adapter->have_msi)
 304                 pci_disable_msi(adapter->pdev);
 305 #endif
 306 }
 307
 308 /**
 309  * e1000_irq_disable - Mask off interrupt generation on the NIC
 310  * @adapter: board private structure
 311  **/
 312
 313 static void
 314 e1000_irq_disable(struct e1000_adapter *adapter)
 315 {
 316         atomic_inc(&adapter->irq_sem);
 317         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 318         E1000_WRITE_FLUSH(&adapter->hw);
 319         synchronize_irq(adapter->pdev->irq);
 320 }
 321
 322 /**
 323  * e1000_irq_enable - Enable default interrupt generation settings
 324  * @adapter: board private structure
 325  **/
 326
 327 static void
 328 e1000_irq_enable(struct e1000_adapter *adapter)
 329 {
 330         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 331                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 332                 E1000_WRITE_FLUSH(&adapter->hw);
 333         }
 334 }
 335
 336 static void
 337 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 338 {
 339         struct net_device *netdev = adapter->netdev;
 340         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 341         uint16_t old_vid = adapter->mng_vlan_id;
 342         if (adapter->vlgrp) {
 343                 if (!adapter->vlgrp->vlan_devices[vid]) {
 344                         if (adapter->hw.mng_cookie.status &
 345                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 346                                 e1000_vlan_rx_add_vid(netdev, vid);
 347                                 adapter->mng_vlan_id = vid;
 348                         } else
 349                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 350
 351                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 352                                         (vid != old_vid) &&
 353                                         !adapter->vlgrp->vlan_devices[old_vid])
 354                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 355                 } else
 356                         adapter->mng_vlan_id = vid;
 357         }
 358 }
 359
 360 /**
 361  * e1000_release_hw_control - release control of the h/w to f/w
 362  * @adapter: address of board private structure
 363  *
 364  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 365  * For ASF and Pass Through versions of f/w this means that the
 366  * driver is no longer loaded. For AMT version (only with 82573) i
 367  * of the f/w this means that the netowrk i/f is closed.
 368  *
 369  **/
 370
 371 static void
 372 e1000_release_hw_control(struct e1000_adapter *adapter)
 373 {
 374         uint32_t ctrl_ext;
 375         uint32_t swsm;
 376         uint32_t extcnf;
 377
 378         /* Let firmware taken over control of h/w */
 379         switch (adapter->hw.mac_type) {
 380         case e1000_82571:
 381         case e1000_82572:
 382         case e1000_80003es2lan:
 383                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 384                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 385                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 386                 break;
 387         case e1000_82573:
 388                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 389                 E1000_WRITE_REG(&adapter->hw, SWSM,
 390                                 swsm & ~E1000_SWSM_DRV_LOAD);
 391         case e1000_ich8lan:
 392                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 393                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 394                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
 395                 break;
 396         default:
 397                 break;
 398         }
 399 }
 400
 401 /**
 402  * e1000_get_hw_control - get control of the h/w from f/w
 403  * @adapter: address of board private structure
 404  *
 405  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 406  * For ASF and Pass Through versions of f/w this means that
 407  * the driver is loaded. For AMT version (only with 82573)
 408  * of the f/w this means that the netowrk i/f is open.
 409  *
 410  **/
 411
 412 static void
 413 e1000_get_hw_control(struct e1000_adapter *adapter)
 414 {
 415         uint32_t ctrl_ext;
 416         uint32_t swsm;
 417         uint32_t extcnf;
 418         /* Let firmware know the driver has taken over */
 419         switch (adapter->hw.mac_type) {
 420         case e1000_82571:
 421         case e1000_82572:
 422         case e1000_80003es2lan:
 423                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 424                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 425                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 426                 break;
 427         case e1000_82573:
 428                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 429                 E1000_WRITE_REG(&adapter->hw, SWSM,
 430                                 swsm | E1000_SWSM_DRV_LOAD);
 431                 break;
 432         case e1000_ich8lan:
 433                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
 434                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
 435                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
 436                 break;
 437         default:
 438                 break;
 439         }
 440 }
 441
 442 int
 443 e1000_up(struct e1000_adapter *adapter)
 444 {
 445         struct net_device *netdev = adapter->netdev;
 446         int i;
 447
 448         /* hardware has been reset, we need to reload some things */
 449
 450         e1000_set_multi(netdev);
 451
 452         e1000_restore_vlan(adapter);
 453
 454         e1000_configure_tx(adapter);
 455         e1000_setup_rctl(adapter);
 456         e1000_configure_rx(adapter);
 457         /* call E1000_DESC_UNUSED which always leaves
 458          * at least 1 descriptor unused to make sure
 459          * next_to_use != next_to_clean */
 460         for (i = 0; i < adapter->num_rx_queues; i++) {
 461                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 462                 adapter->alloc_rx_buf(adapter, ring,
 463                                       E1000_DESC_UNUSED(ring));
 464         }
 465
 466         adapter->tx_queue_len = netdev->tx_queue_len;
 467
 468         mod_timer(&adapter->watchdog_timer, jiffies);
 469
 470 #ifdef CONFIG_E1000_NAPI
 471         netif_poll_enable(netdev);
 472 #endif
 473         e1000_irq_enable(adapter);
 474
 475         return 0;
 476 }
 477
 478 /**
 479  * e1000_power_up_phy - restore link in case the phy was powered down
 480  * @adapter: address of board private structure
 481  *
 482  * The phy may be powered down to save power and turn off link when the
 483  * driver is unloaded and wake on lan is not enabled (among others)
 484  * *** this routine MUST be followed by a call to e1000_reset ***
 485  *
 486  **/
 487
 488 static void e1000_power_up_phy(struct e1000_adapter *adapter)
 489 {
 490         uint16_t mii_reg = 0;
 491
 492         /* Just clear the power down bit to wake the phy back up */
 493         if (adapter->hw.media_type == e1000_media_type_copper) {
 494                 /* according to the manual, the phy will retain its
 495                  * settings across a power-down/up cycle */
 496                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 497                 mii_reg &= ~MII_CR_POWER_DOWN;
 498                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 499         }
 500 }
 501
 502 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 503 {
 504         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 505                                       e1000_check_mng_mode(&adapter->hw);
 506         /* Power down the PHY so no link is implied when interface is down
 507          * The PHY cannot be powered down if any of the following is TRUE
 508          * (a) WoL is enabled
 509          * (b) AMT is active
 510          * (c) SoL/IDER session is active */
 511         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 512             adapter->hw.mac_type != e1000_ich8lan &&
 513             adapter->hw.media_type == e1000_media_type_copper &&
 514             !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 515             !mng_mode_enabled &&
 516             !e1000_check_phy_reset_block(&adapter->hw)) {
 517                 uint16_t mii_reg = 0;
 518                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 519                 mii_reg |= MII_CR_POWER_DOWN;
 520                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 521                 mdelay(1);
 522         }
 523 }
 524
 525 void
 526 e1000_down(struct e1000_adapter *adapter)
 527 {
 528         struct net_device *netdev = adapter->netdev;
 529
 530         e1000_irq_disable(adapter);
 531
 532         del_timer_sync(&adapter->tx_fifo_stall_timer);
 533         del_timer_sync(&adapter->watchdog_timer);
 534         del_timer_sync(&adapter->phy_info_timer);
 535
 536 #ifdef CONFIG_E1000_NAPI
 537         netif_poll_disable(netdev);
 538 #endif
 539         netdev->tx_queue_len = adapter->tx_queue_len;
 540         adapter->link_speed = 0;
 541         adapter->link_duplex = 0;
 542         netif_carrier_off(netdev);
 543         netif_stop_queue(netdev);
 544
 545         e1000_reset(adapter);
 546         e1000_clean_all_tx_rings(adapter);
 547         e1000_clean_all_rx_rings(adapter);
 548 }
 549
 550 void
 551 e1000_reinit_locked(struct e1000_adapter *adapter)
 552 {
 553         WARN_ON(in_interrupt());
 554         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 555                 msleep(1);
 556         e1000_down(adapter);
 557         e1000_up(adapter);
 558         clear_bit(__E1000_RESETTING, &adapter->flags);
 559 }
 560
 561 void
 562 e1000_reset(struct e1000_adapter *adapter)
 563 {
 564         uint32_t pba, manc;
 565         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 566
 567         /* Repartition Pba for greater than 9k mtu
 568          * To take effect CTRL.RST is required.
 569          */
 570
 571         switch (adapter->hw.mac_type) {
 572         case e1000_82547:
 573         case e1000_82547_rev_2:
 574                 pba = E1000_PBA_30K;
 575                 break;
 576         case e1000_82571:
 577         case e1000_82572:
 578         case e1000_80003es2lan:
 579                 pba = E1000_PBA_38K;
 580                 break;
 581         case e1000_82573:
 582                 pba = E1000_PBA_12K;
 583                 break;
 584         case e1000_ich8lan:
 585                 pba = E1000_PBA_8K;
 586                 break;
 587         default:
 588                 pba = E1000_PBA_48K;
 589                 break;
 590         }
 591
 592         if ((adapter->hw.mac_type != e1000_82573) &&
 593            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 594                 pba -= 8; /* allocate more FIFO for Tx */
 595
 596
 597         if (adapter->hw.mac_type == e1000_82547) {
 598                 adapter->tx_fifo_head = 0;
 599                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 600                 adapter->tx_fifo_size =
 601                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 602                 atomic_set(&adapter->tx_fifo_stall, 0);
 603         }
 604
 605         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 606
 607         /* flow control settings */
 608         /* Set the FC high water mark to 90% of the FIFO size.
 609          * Required to clear last 3 LSB */
 610         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 611         /* We can't use 90% on small FIFOs because the remainder
 612          * would be less than 1 full frame.  In this case, we size
 613          * it to allow at least a full frame above the high water
 614          *  mark. */
 615         if (pba < E1000_PBA_16K)
 616                 fc_high_water_mark = (pba * 1024) - 1600;
 617
 618         adapter->hw.fc_high_water = fc_high_water_mark;
 619         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 620         if (adapter->hw.mac_type == e1000_80003es2lan)
 621                 adapter->hw.fc_pause_time = 0xFFFF;
 622         else
 623                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 624         adapter->hw.fc_send_xon = 1;
 625         adapter->hw.fc = adapter->hw.original_fc;
 626
 627         /* Allow time for pending master requests to run */
 628         e1000_reset_hw(&adapter->hw);
 629         if (adapter->hw.mac_type >= e1000_82544)
 630                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 631         if (e1000_init_hw(&adapter->hw))
 632                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 633         e1000_update_mng_vlan(adapter);
 634         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 635         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 636
 637         e1000_reset_adaptive(&adapter->hw);
 638         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 639
 640         if (!adapter->smart_power_down &&
 641             (adapter->hw.mac_type == e1000_82571 ||
 642              adapter->hw.mac_type == e1000_82572)) {
 643                 uint16_t phy_data = 0;
 644                 /* speed up time to link by disabling smart power down, ignore
 645                  * the return value of this function because there is nothing
 646                  * different we would do if it failed */
 647                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 648                                    &phy_data);
 649                 phy_data &= ~IGP02E1000_PM_SPD;
 650                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 651                                     phy_data);
 652         }
 653
 654         if (adapter->hw.mac_type < e1000_ich8lan)
 655         /* FIXME: this code is duplicate and wrong for PCI Express */
 656         if (adapter->en_mng_pt) {
 657                 manc = E1000_READ_REG(&adapter->hw, MANC);
 658                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 659                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 660         }
 661 }
 662
 663 /**
 664  * e1000_probe - Device Initialization Routine
 665  * @pdev: PCI device information struct
 666  * @ent: entry in e1000_pci_tbl
 667  *
 668  * Returns 0 on success, negative on failure
 669  *
 670  * e1000_probe initializes an adapter identified by a pci_dev structure.
 671  * The OS initialization, configuring of the adapter private structure,
 672  * and a hardware reset occur.
 673  **/
 674
 675 static int __devinit
 676 e1000_probe(struct pci_dev *pdev,
 677             const struct pci_device_id *ent)
 678 {
 679         struct net_device *netdev;
 680         struct e1000_adapter *adapter;
 681         unsigned long mmio_start, mmio_len;
 682         unsigned long flash_start, flash_len;
 683
 684         static int cards_found = 0;
 685         static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
 686         int i, err, pci_using_dac;
 687         uint16_t eeprom_data;
 688         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 689         if ((err = pci_enable_device(pdev)))
 690                 return err;
 691
 692         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 693             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 694                 pci_using_dac = 1;
 695         } else {
 696                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 697                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 698                         E1000_ERR("No usable DMA configuration, aborting\n");
 699                         return err;
 700                 }
 701                 pci_using_dac = 0;
 702         }
 703
 704         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 705                 return err;
 706
 707         pci_set_master(pdev);
 708
 709         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 710         if (!netdev) {
 711                 err = -ENOMEM;
 712                 goto err_alloc_etherdev;
 713         }
 714
 715         SET_MODULE_OWNER(netdev);
 716         SET_NETDEV_DEV(netdev, &pdev->dev);
 717
 718         pci_set_drvdata(pdev, netdev);
 719         adapter = netdev_priv(netdev);
 720         adapter->netdev = netdev;
 721         adapter->pdev = pdev;
 722         adapter->hw.back = adapter;
 723         adapter->msg_enable = (1 << debug) - 1;
 724
 725         mmio_start = pci_resource_start(pdev, BAR_0);
 726         mmio_len = pci_resource_len(pdev, BAR_0);
 727
 728         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 729         if (!adapter->hw.hw_addr) {
 730                 err = -EIO;
 731                 goto err_ioremap;
 732         }
 733
 734         for (i = BAR_1; i <= BAR_5; i++) {
 735                 if (pci_resource_len(pdev, i) == 0)
 736                         continue;
 737                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 738                         adapter->hw.io_base = pci_resource_start(pdev, i);
 739                         break;
 740                 }
 741         }
 742
 743         netdev->open = &e1000_open;
 744         netdev->stop = &e1000_close;
 745         netdev->hard_start_xmit = &e1000_xmit_frame;
 746         netdev->get_stats = &e1000_get_stats;
 747         netdev->set_multicast_list = &e1000_set_multi;
 748         netdev->set_mac_address = &e1000_set_mac;
 749         netdev->change_mtu = &e1000_change_mtu;
 750         netdev->do_ioctl = &e1000_ioctl;
 751         e1000_set_ethtool_ops(netdev);
 752         netdev->tx_timeout = &e1000_tx_timeout;
 753         netdev->watchdog_timeo = 5 * HZ;
 754 #ifdef CONFIG_E1000_NAPI
 755         netdev->poll = &e1000_clean;
 756         netdev->weight = 64;
 757 #endif
 758         netdev->vlan_rx_register = e1000_vlan_rx_register;
 759         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 760         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 761 #ifdef CONFIG_NET_POLL_CONTROLLER
 762         netdev->poll_controller = e1000_netpoll;
 763 #endif
 764         strcpy(netdev->name, pci_name(pdev));
 765
 766         netdev->mem_start = mmio_start;
 767         netdev->mem_end = mmio_start + mmio_len;
 768         netdev->base_addr = adapter->hw.io_base;
 769
 770         adapter->bd_number = cards_found;
 771
 772         /* setup the private structure */
 773
 774         if ((err = e1000_sw_init(adapter)))
 775                 goto err_sw_init;
 776
 777         /* Flash BAR mapping must happen after e1000_sw_init
 778          * because it depends on mac_type */
 779         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 780            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 781                 flash_start = pci_resource_start(pdev, 1);
 782                 flash_len = pci_resource_len(pdev, 1);
 783                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 784                 if (!adapter->hw.flash_address) {
 785                         err = -EIO;
 786                         goto err_flashmap;
 787                 }
 788         }
 789
 790         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 791                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 792
 793         /* if ksp3, indicate if it's port a being setup */
 794         if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
 795                         e1000_ksp3_port_a == 0)
 796                 adapter->ksp3_port_a = 1;
 797         e1000_ksp3_port_a++;
 798         /* Reset for multiple KP3 adapters */
 799         if (e1000_ksp3_port_a == 4)
 800                 e1000_ksp3_port_a = 0;
 801
 802         if (adapter->hw.mac_type >= e1000_82543) {
 803                 netdev->features = NETIF_F_SG |
 804                                    NETIF_F_HW_CSUM |
 805                                    NETIF_F_HW_VLAN_TX |
 806                                    NETIF_F_HW_VLAN_RX |
 807                                    NETIF_F_HW_VLAN_FILTER;
 808                 if (adapter->hw.mac_type == e1000_ich8lan)
 809                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
 810         }
 811
 812 #ifdef NETIF_F_TSO
 813         if ((adapter->hw.mac_type >= e1000_82544) &&
 814            (adapter->hw.mac_type != e1000_82547))
 815                 netdev->features |= NETIF_F_TSO;
 816
 817 #ifdef NETIF_F_TSO_IPV6
 818         if (adapter->hw.mac_type > e1000_82547_rev_2)
 819                 netdev->features |= NETIF_F_TSO_IPV6;
 820 #endif
 821 #endif
 822         if (pci_using_dac)
 823                 netdev->features |= NETIF_F_HIGHDMA;
 824
 825         netdev->features |= NETIF_F_LLTX;
 826
 827         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 828
 829         /* initialize eeprom parameters */
 830
 831         if (e1000_init_eeprom_params(&adapter->hw)) {
 832                 E1000_ERR("EEPROM initialization failed\n");
 833                 return -EIO;
 834         }
 835
 836         /* before reading the EEPROM, reset the controller to
 837          * put the device in a known good starting state */
 838
 839         e1000_reset_hw(&adapter->hw);
 840
 841         /* make sure the EEPROM is good */
 842
 843         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 844                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 845                 err = -EIO;
 846                 goto err_eeprom;
 847         }
 848
 849         /* copy the MAC address out of the EEPROM */
 850
 851         if (e1000_read_mac_addr(&adapter->hw))
 852                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 853         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 854         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 855
 856         if (!is_valid_ether_addr(netdev->perm_addr)) {
 857                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 858                 err = -EIO;
 859                 goto err_eeprom;
 860         }
 861
 862         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 863
 864         e1000_get_bus_info(&adapter->hw);
 865
 866         init_timer(&adapter->tx_fifo_stall_timer);
 867         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 868         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 869
 870         init_timer(&adapter->watchdog_timer);
 871         adapter->watchdog_timer.function = &e1000_watchdog;
 872         adapter->watchdog_timer.data = (unsigned long) adapter;
 873
 874         init_timer(&adapter->phy_info_timer);
 875         adapter->phy_info_timer.function = &e1000_update_phy_info;
 876         adapter->phy_info_timer.data = (unsigned long) adapter;
 877
 878         INIT_WORK(&adapter->reset_task,
 879                 (void (*)(void *))e1000_reset_task, netdev);
 880
 881         /* we're going to reset, so assume we have no link for now */
 882
 883         netif_carrier_off(netdev);
 884         netif_stop_queue(netdev);
 885
 886         e1000_check_options(adapter);
 887
 888         /* Initial Wake on LAN setting
 889          * If APM wake is enabled in the EEPROM,
 890          * enable the ACPI Magic Packet filter
 891          */
 892
 893         switch (adapter->hw.mac_type) {
 894         case e1000_82542_rev2_0:
 895         case e1000_82542_rev2_1:
 896         case e1000_82543:
 897                 break;
 898         case e1000_82544:
 899                 e1000_read_eeprom(&adapter->hw,
 900                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 901                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 902                 break;
 903         case e1000_ich8lan:
 904                 e1000_read_eeprom(&adapter->hw,
 905                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
 906                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
 907                 break;
 908         case e1000_82546:
 909         case e1000_82546_rev_3:
 910         case e1000_82571:
 911         case e1000_80003es2lan:
 912                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 913                         e1000_read_eeprom(&adapter->hw,
 914                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 915                         break;
 916                 }
 917                 /* Fall Through */
 918         default:
 919                 e1000_read_eeprom(&adapter->hw,
 920                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 921                 break;
 922         }
 923         if (eeprom_data & eeprom_apme_mask)
 924                 adapter->wol |= E1000_WUFC_MAG;
 925
 926         /* print bus type/speed/width info */
 927         {
 928         struct e1000_hw *hw = &adapter->hw;
 929         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 930                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 931                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 932                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 933                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 934                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 935                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 936                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 937                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 938                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 939                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 940                  "32-bit"));
 941         }
 942
 943         for (i = 0; i < 6; i++)
 944                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 945
 946         /* reset the hardware with the new settings */
 947         e1000_reset(adapter);
 948
 949         /* If the controller is 82573 and f/w is AMT, do not set
 950          * DRV_LOAD until the interface is up.  For all other cases,
 951          * let the f/w know that the h/w is now under the control
 952          * of the driver. */
 953         if (adapter->hw.mac_type != e1000_82573 ||
 954             !e1000_check_mng_mode(&adapter->hw))
 955                 e1000_get_hw_control(adapter);
 956
 957         strcpy(netdev->name, "eth%d");
 958         if ((err = register_netdev(netdev)))
 959                 goto err_register;
 960
 961         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 962
 963         cards_found++;
 964         return 0;
 965
 966 err_register:
 967         if (adapter->hw.flash_address)
 968                 iounmap(adapter->hw.flash_address);
 969 err_flashmap:
 970 err_sw_init:
 971 err_eeprom:
 972         iounmap(adapter->hw.hw_addr);
 973 err_ioremap:
 974         free_netdev(netdev);
 975 err_alloc_etherdev:
 976         pci_release_regions(pdev);
 977         return err;
 978 }
 979
 980 /**
 981  * e1000_remove - Device Removal Routine
 982  * @pdev: PCI device information struct
 983  *
 984  * e1000_remove is called by the PCI subsystem to alert the driver
 985  * that it should release a PCI device.  The could be caused by a
 986  * Hot-Plug event, or because the driver is going to be removed from
 987  * memory.
 988  **/
 989
 990 static void __devexit
 991 e1000_remove(struct pci_dev *pdev)
 992 {
 993         struct net_device *netdev = pci_get_drvdata(pdev);
 994         struct e1000_adapter *adapter = netdev_priv(netdev);
 995         uint32_t manc;
 996 #ifdef CONFIG_E1000_NAPI
 997         int i;
 998 #endif
 999
1000         flush_scheduled_work();
1001
1002         if (adapter->hw.mac_type >= e1000_82540 &&
1003            adapter->hw.mac_type != e1000_ich8lan &&
1004            adapter->hw.media_type == e1000_media_type_copper) {
1005                 manc = E1000_READ_REG(&adapter->hw, MANC);
1006                 if (manc & E1000_MANC_SMBUS_EN) {
1007                         manc |= E1000_MANC_ARP_EN;
1008                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
1009                 }
1010         }
1011
1012         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1013          * would have already happened in close and is redundant. */
1014         e1000_release_hw_control(adapter);
1015
1016         unregister_netdev(netdev);
1017 #ifdef CONFIG_E1000_NAPI
1018         for (i = 0; i < adapter->num_rx_queues; i++)
1019                 dev_put(&adapter->polling_netdev[i]);
1020 #endif
1021
1022         if (!e1000_check_phy_reset_block(&adapter->hw))
1023                 e1000_phy_hw_reset(&adapter->hw);
1024
1025         kfree(adapter->tx_ring);
1026         kfree(adapter->rx_ring);
1027 #ifdef CONFIG_E1000_NAPI
1028         kfree(adapter->polling_netdev);
1029 #endif
1030
1031         iounmap(adapter->hw.hw_addr);
1032         if (adapter->hw.flash_address)
1033                 iounmap(adapter->hw.flash_address);
1034         pci_release_regions(pdev);
1035
1036         free_netdev(netdev);
1037
1038         pci_disable_device(pdev);
1039 }
1040
1041 /**
1042  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1043  * @adapter: board private structure to initialize
1044  *
1045  * e1000_sw_init initializes the Adapter private data structure.
1046  * Fields are initialized based on PCI device information and
1047  * OS network device settings (MTU size).
1048  **/
1049
1050 static int __devinit
1051 e1000_sw_init(struct e1000_adapter *adapter)
1052 {
1053         struct e1000_hw *hw = &adapter->hw;
1054         struct net_device *netdev = adapter->netdev;
1055         struct pci_dev *pdev = adapter->pdev;
1056 #ifdef CONFIG_E1000_NAPI
1057         int i;
1058 #endif
1059
1060         /* PCI config space info */
1061
1062         hw->vendor_id = pdev->vendor;
1063         hw->device_id = pdev->device;
1064         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1065         hw->subsystem_id = pdev->subsystem_device;
1066
1067         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1068
1069         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1070
1071         adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
1072         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1073         hw->max_frame_size = netdev->mtu +
1074                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1075         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1076
1077         /* identify the MAC */
1078
1079         if (e1000_set_mac_type(hw)) {
1080                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1081                 return -EIO;
1082         }
1083
1084         switch (hw->mac_type) {
1085         default:
1086                 break;
1087         case e1000_82541:
1088         case e1000_82547:
1089         case e1000_82541_rev_2:
1090         case e1000_82547_rev_2:
1091                 hw->phy_init_script = 1;
1092                 break;
1093         }
1094
1095         e1000_set_media_type(hw);
1096
1097         hw->wait_autoneg_complete = FALSE;
1098         hw->tbi_compatibility_en = TRUE;
1099         hw->adaptive_ifs = TRUE;
1100
1101         /* Copper options */
1102
1103         if (hw->media_type == e1000_media_type_copper) {
1104                 hw->mdix = AUTO_ALL_MODES;
1105                 hw->disable_polarity_correction = FALSE;
1106                 hw->master_slave = E1000_MASTER_SLAVE;
1107         }
1108
1109         adapter->num_tx_queues = 1;
1110         adapter->num_rx_queues = 1;
1111
1112         if (e1000_alloc_queues(adapter)) {
1113                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1114                 return -ENOMEM;
1115         }
1116
1117 #ifdef CONFIG_E1000_NAPI
1118         for (i = 0; i < adapter->num_rx_queues; i++) {
1119                 adapter->polling_netdev[i].priv = adapter;
1120                 adapter->polling_netdev[i].poll = &e1000_clean;
1121                 adapter->polling_netdev[i].weight = 64;
1122                 dev_hold(&adapter->polling_netdev[i]);
1123                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1124         }
1125         spin_lock_init(&adapter->tx_queue_lock);
1126 #endif
1127
1128         atomic_set(&adapter->irq_sem, 1);
1129         spin_lock_init(&adapter->stats_lock);
1130
1131         return 0;
1132 }
1133
1134 /**
1135  * e1000_alloc_queues - Allocate memory for all rings
1136  * @adapter: board private structure to initialize
1137  *
1138  * We allocate one ring per queue at run-time since we don't know the
1139  * number of queues at compile-time.  The polling_netdev array is
1140  * intended for Multiqueue, but should work fine with a single queue.
1141  **/
1142
1143 static int __devinit
1144 e1000_alloc_queues(struct e1000_adapter *adapter)
1145 {
1146         int size;
1147
1148         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1149         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1150         if (!adapter->tx_ring)
1151                 return -ENOMEM;
1152         memset(adapter->tx_ring, 0, size);
1153
1154         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1155         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1156         if (!adapter->rx_ring) {
1157                 kfree(adapter->tx_ring);
1158                 return -ENOMEM;
1159         }
1160         memset(adapter->rx_ring, 0, size);
1161
1162 #ifdef CONFIG_E1000_NAPI
1163         size = sizeof(struct net_device) * adapter->num_rx_queues;
1164         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1165         if (!adapter->polling_netdev) {
1166                 kfree(adapter->tx_ring);
1167                 kfree(adapter->rx_ring);
1168                 return -ENOMEM;
1169         }
1170         memset(adapter->polling_netdev, 0, size);
1171 #endif
1172
1173         return E1000_SUCCESS;
1174 }
1175
1176 /**
1177  * e1000_open - Called when a network interface is made active
1178  * @netdev: network interface device structure
1179  *
1180  * Returns 0 on success, negative value on failure
1181  *
1182  * The open entry point is called when a network interface is made
1183  * active by the system (IFF_UP).  At this point all resources needed
1184  * for transmit and receive operations are allocated, the interrupt
1185  * handler is registered with the OS, the watchdog timer is started,
1186  * and the stack is notified that the interface is ready.
1187  **/
1188
1189 static int
1190 e1000_open(struct net_device *netdev)
1191 {
1192         struct e1000_adapter *adapter = netdev_priv(netdev);
1193         int err;
1194
1195         /* disallow open during test */
1196         if (test_bit(__E1000_DRIVER_TESTING, &adapter->flags))
1197                 return -EBUSY;
1198
1199         /* allocate transmit descriptors */
1200
1201         if ((err = e1000_setup_all_tx_resources(adapter)))
1202                 goto err_setup_tx;
1203
1204         /* allocate receive descriptors */
1205
1206         if ((err = e1000_setup_all_rx_resources(adapter)))
1207                 goto err_setup_rx;
1208
1209         err = e1000_request_irq(adapter);
1210         if (err)
1211                 goto err_up;
1212
1213         e1000_power_up_phy(adapter);
1214
1215         if ((err = e1000_up(adapter)))
1216                 goto err_up;
1217         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1218         if ((adapter->hw.mng_cookie.status &
1219                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1220                 e1000_update_mng_vlan(adapter);
1221         }
1222
1223         /* If AMT is enabled, let the firmware know that the network
1224          * interface is now open */
1225         if (adapter->hw.mac_type == e1000_82573 &&
1226             e1000_check_mng_mode(&adapter->hw))
1227                 e1000_get_hw_control(adapter);
1228
1229         return E1000_SUCCESS;
1230
1231 err_up:
1232         e1000_free_all_rx_resources(adapter);
1233 err_setup_rx:
1234         e1000_free_all_tx_resources(adapter);
1235 err_setup_tx:
1236         e1000_reset(adapter);
1237
1238         return err;
1239 }
1240
1241 /**
1242  * e1000_close - Disables a network interface
1243  * @netdev: network interface device structure
1244  *
1245  * Returns 0, this is not allowed to fail
1246  *
1247  * The close entry point is called when an interface is de-activated
1248  * by the OS.  The hardware is still under the drivers control, but
1249  * needs to be disabled.  A global MAC reset is issued to stop the
1250  * hardware, and all transmit and receive resources are freed.
1251  **/
1252
1253 static int
1254 e1000_close(struct net_device *netdev)
1255 {
1256         struct e1000_adapter *adapter = netdev_priv(netdev);
1257
1258         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1259         e1000_down(adapter);
1260         e1000_power_down_phy(adapter);
1261         e1000_free_irq(adapter);
1262
1263         e1000_free_all_tx_resources(adapter);
1264         e1000_free_all_rx_resources(adapter);
1265
1266         if ((adapter->hw.mng_cookie.status &
1267                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1268                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1269         }
1270
1271         /* If AMT is enabled, let the firmware know that the network
1272          * interface is now closed */
1273         if (adapter->hw.mac_type == e1000_82573 &&
1274             e1000_check_mng_mode(&adapter->hw))
1275                 e1000_release_hw_control(adapter);
1276
1277         return 0;
1278 }
1279
1280 /**
1281  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1282  * @adapter: address of board private structure
1283  * @start: address of beginning of memory
1284  * @len: length of memory
1285  **/
1286 static boolean_t
1287 e1000_check_64k_bound(struct e1000_adapter *adapter,
1288                       void *start, unsigned long len)
1289 {
1290         unsigned long begin = (unsigned long) start;
1291         unsigned long end = begin + len;
1292
1293         /* First rev 82545 and 82546 need to not allow any memory
1294          * write location to cross 64k boundary due to errata 23 */
1295         if (adapter->hw.mac_type == e1000_82545 ||
1296             adapter->hw.mac_type == e1000_82546) {
1297                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1298         }
1299
1300         return TRUE;
1301 }
1302
1303 /**
1304  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1305  * @adapter: board private structure
1306  * @txdr:    tx descriptor ring (for a specific queue) to setup
1307  *
1308  * Return 0 on success, negative on failure
1309  **/
1310
1311 static int
1312 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1313                          struct e1000_tx_ring *txdr)
1314 {
1315         struct pci_dev *pdev = adapter->pdev;
1316         int size;
1317
1318         size = sizeof(struct e1000_buffer) * txdr->count;
1319         txdr->buffer_info = vmalloc(size);
1320         if (!txdr->buffer_info) {
1321                 DPRINTK(PROBE, ERR,
1322                 "Unable to allocate memory for the transmit descriptor ring\n");
1323                 return -ENOMEM;
1324         }
1325         memset(txdr->buffer_info, 0, size);
1326
1327         /* round up to nearest 4K */
1328
1329         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1330         E1000_ROUNDUP(txdr->size, 4096);
1331
1332         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1333         if (!txdr->desc) {
1334 setup_tx_desc_die:
1335                 vfree(txdr->buffer_info);
1336                 DPRINTK(PROBE, ERR,
1337                 "Unable to allocate memory for the transmit descriptor ring\n");
1338                 return -ENOMEM;
1339         }
1340
1341         /* Fix for errata 23, can't cross 64kB boundary */
1342         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1343                 void *olddesc = txdr->desc;
1344                 dma_addr_t olddma = txdr->dma;
1345                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1346                                      "at %p\n", txdr->size, txdr->desc);
1347                 /* Try again, without freeing the previous */
1348                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1349                 /* Failed allocation, critical failure */
1350                 if (!txdr->desc) {
1351                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1352                         goto setup_tx_desc_die;
1353                 }
1354
1355                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1356                         /* give up */
1357                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1358                                             txdr->dma);
1359                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1360                         DPRINTK(PROBE, ERR,
1361                                 "Unable to allocate aligned memory "
1362                                 "for the transmit descriptor ring\n");
1363                         vfree(txdr->buffer_info);
1364                         return -ENOMEM;
1365                 } else {
1366                         /* Free old allocation, new allocation was successful */
1367                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1368                 }
1369         }
1370         memset(txdr->desc, 0, txdr->size);
1371
1372         txdr->next_to_use = 0;
1373         txdr->next_to_clean = 0;
1374         spin_lock_init(&txdr->tx_lock);
1375
1376         return 0;
1377 }
1378
1379 /**
1380  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1381  *                                (Descriptors) for all queues
1382  * @adapter: board private structure
1383  *
1384  * If this function returns with an error, then it's possible one or
1385  * more of the rings is populated (while the rest are not).  It is the
1386  * callers duty to clean those orphaned rings.
1387  *
1388  * Return 0 on success, negative on failure
1389  **/
1390
1391 int
1392 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1393 {
1394         int i, err = 0;
1395
1396         for (i = 0; i < adapter->num_tx_queues; i++) {
1397                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1398                 if (err) {
1399                         DPRINTK(PROBE, ERR,
1400                                 "Allocation for Tx Queue %u failed\n", i);
1401                         break;
1402                 }
1403         }
1404
1405         return err;
1406 }
1407
1408 /**
1409  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1410  * @adapter: board private structure
1411  *
1412  * Configure the Tx unit of the MAC after a reset.
1413  **/
1414
1415 static void
1416 e1000_configure_tx(struct e1000_adapter *adapter)
1417 {
1418         uint64_t tdba;
1419         struct e1000_hw *hw = &adapter->hw;
1420         uint32_t tdlen, tctl, tipg, tarc;
1421         uint32_t ipgr1, ipgr2;
1422
1423         /* Setup the HW Tx Head and Tail descriptor pointers */
1424
1425         switch (adapter->num_tx_queues) {
1426         case 1:
1427         default:
1428                 tdba = adapter->tx_ring[0].dma;
1429                 tdlen = adapter->tx_ring[0].count *
1430                         sizeof(struct e1000_tx_desc);
1431                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1432                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1433                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1434                 E1000_WRITE_REG(hw, TDT, 0);
1435                 E1000_WRITE_REG(hw, TDH, 0);
1436                 adapter->tx_ring[0].tdh = E1000_TDH;
1437                 adapter->tx_ring[0].tdt = E1000_TDT;
1438                 break;
1439         }
1440
1441         /* Set the default values for the Tx Inter Packet Gap timer */
1442
1443         if (hw->media_type == e1000_media_type_fiber ||
1444             hw->media_type == e1000_media_type_internal_serdes)
1445                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1446         else
1447                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1448
1449         switch (hw->mac_type) {
1450         case e1000_82542_rev2_0:
1451         case e1000_82542_rev2_1:
1452                 tipg = DEFAULT_82542_TIPG_IPGT;
1453                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1454                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1455                 break;
1456         case e1000_80003es2lan:
1457                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1458                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1459                 break;
1460         default:
1461                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1462                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1463                 break;
1464         }
1465         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1466         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1467         E1000_WRITE_REG(hw, TIPG, tipg);
1468
1469         /* Set the Tx Interrupt Delay register */
1470
1471         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1472         if (hw->mac_type >= e1000_82540)
1473                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1474
1475         /* Program the Transmit Control Register */
1476
1477         tctl = E1000_READ_REG(hw, TCTL);
1478
1479         tctl &= ~E1000_TCTL_CT;
1480         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1481                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1482
1483 #ifdef DISABLE_MULR
1484         /* disable Multiple Reads for debugging */
1485         tctl &= ~E1000_TCTL_MULR;
1486 #endif
1487
1488         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1489                 tarc = E1000_READ_REG(hw, TARC0);
1490                 tarc |= ((1 << 25) | (1 << 21));
1491                 E1000_WRITE_REG(hw, TARC0, tarc);
1492                 tarc = E1000_READ_REG(hw, TARC1);
1493                 tarc |= (1 << 25);
1494                 if (tctl & E1000_TCTL_MULR)
1495                         tarc &= ~(1 << 28);
1496                 else
1497                         tarc |= (1 << 28);
1498                 E1000_WRITE_REG(hw, TARC1, tarc);
1499         } else if (hw->mac_type == e1000_80003es2lan) {
1500                 tarc = E1000_READ_REG(hw, TARC0);
1501                 tarc |= 1;
1502                 if (hw->media_type == e1000_media_type_internal_serdes)
1503                         tarc |= (1 << 20);
1504                 E1000_WRITE_REG(hw, TARC0, tarc);
1505                 tarc = E1000_READ_REG(hw, TARC1);
1506                 tarc |= 1;
1507                 E1000_WRITE_REG(hw, TARC1, tarc);
1508         }
1509
1510         e1000_config_collision_dist(hw);
1511
1512         /* Setup Transmit Descriptor Settings for eop descriptor */
1513         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1514                 E1000_TXD_CMD_IFCS;
1515
1516         if (hw->mac_type < e1000_82543)
1517                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1518         else
1519                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1520
1521         /* Cache if we're 82544 running in PCI-X because we'll
1522          * need this to apply a workaround later in the send path. */
1523         if (hw->mac_type == e1000_82544 &&
1524             hw->bus_type == e1000_bus_type_pcix)
1525                 adapter->pcix_82544 = 1;
1526
1527         E1000_WRITE_REG(hw, TCTL, tctl);
1528
1529 }
1530
1531 /**
1532  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1533  * @adapter: board private structure
1534  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1535  *
1536  * Returns 0 on success, negative on failure
1537  **/
1538
1539 static int
1540 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1541                          struct e1000_rx_ring *rxdr)
1542 {
1543         struct pci_dev *pdev = adapter->pdev;
1544         int size, desc_len;
1545
1546         size = sizeof(struct e1000_buffer) * rxdr->count;
1547         rxdr->buffer_info = vmalloc(size);
1548         if (!rxdr->buffer_info) {
1549                 DPRINTK(PROBE, ERR,
1550                 "Unable to allocate memory for the receive descriptor ring\n");
1551                 return -ENOMEM;
1552         }
1553         memset(rxdr->buffer_info, 0, size);
1554
1555         size = sizeof(struct e1000_ps_page) * rxdr->count;
1556         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1557         if (!rxdr->ps_page) {
1558                 vfree(rxdr->buffer_info);
1559                 DPRINTK(PROBE, ERR,
1560                 "Unable to allocate memory for the receive descriptor ring\n");
1561                 return -ENOMEM;
1562         }
1563         memset(rxdr->ps_page, 0, size);
1564
1565         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1566         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1567         if (!rxdr->ps_page_dma) {
1568                 vfree(rxdr->buffer_info);
1569                 kfree(rxdr->ps_page);
1570                 DPRINTK(PROBE, ERR,
1571                 "Unable to allocate memory for the receive descriptor ring\n");
1572                 return -ENOMEM;
1573         }
1574         memset(rxdr->ps_page_dma, 0, size);
1575
1576         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1577                 desc_len = sizeof(struct e1000_rx_desc);
1578         else
1579                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1580
1581         /* Round up to nearest 4K */
1582
1583         rxdr->size = rxdr->count * desc_len;
1584         E1000_ROUNDUP(rxdr->size, 4096);
1585
1586         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1587
1588         if (!rxdr->desc) {
1589                 DPRINTK(PROBE, ERR,
1590                 "Unable to allocate memory for the receive descriptor ring\n");
1591 setup_rx_desc_die:
1592                 vfree(rxdr->buffer_info);
1593                 kfree(rxdr->ps_page);
1594                 kfree(rxdr->ps_page_dma);
1595                 return -ENOMEM;
1596         }
1597
1598         /* Fix for errata 23, can't cross 64kB boundary */
1599         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1600                 void *olddesc = rxdr->desc;
1601                 dma_addr_t olddma = rxdr->dma;
1602                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1603                                      "at %p\n", rxdr->size, rxdr->desc);
1604                 /* Try again, without freeing the previous */
1605                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1606                 /* Failed allocation, critical failure */
1607                 if (!rxdr->desc) {
1608                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1609                         DPRINTK(PROBE, ERR,
1610                                 "Unable to allocate memory "
1611                                 "for the receive descriptor ring\n");
1612                         goto setup_rx_desc_die;
1613                 }
1614
1615                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1616                         /* give up */
1617                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1618                                             rxdr->dma);
1619                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1620                         DPRINTK(PROBE, ERR,
1621                                 "Unable to allocate aligned memory "
1622                                 "for the receive descriptor ring\n");
1623                         goto setup_rx_desc_die;
1624                 } else {
1625                         /* Free old allocation, new allocation was successful */
1626                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1627                 }
1628         }
1629         memset(rxdr->desc, 0, rxdr->size);
1630
1631         rxdr->next_to_clean = 0;
1632         rxdr->next_to_use = 0;
1633
1634         return 0;
1635 }
1636
1637 /**
1638  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1639  *                                (Descriptors) for all queues
1640  * @adapter: board private structure
1641  *
1642  * If this function returns with an error, then it's possible one or
1643  * more of the rings is populated (while the rest are not).  It is the
1644  * callers duty to clean those orphaned rings.
1645  *
1646  * Return 0 on success, negative on failure
1647  **/
1648
1649 int
1650 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1651 {
1652         int i, err = 0;
1653
1654         for (i = 0; i < adapter->num_rx_queues; i++) {
1655                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1656                 if (err) {
1657                         DPRINTK(PROBE, ERR,
1658                                 "Allocation for Rx Queue %u failed\n", i);
1659                         break;
1660                 }
1661         }
1662
1663         return err;
1664 }
1665
1666 /**
1667  * e1000_setup_rctl - configure the receive control registers
1668  * @adapter: Board private structure
1669  **/
1670 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1671                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1672 static void
1673 e1000_setup_rctl(struct e1000_adapter *adapter)
1674 {
1675         uint32_t rctl, rfctl;
1676         uint32_t psrctl = 0;
1677 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1678         uint32_t pages = 0;
1679 #endif
1680
1681         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1682
1683         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1684
1685         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1686                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1687                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1688
1689         if (adapter->hw.tbi_compatibility_on == 1)
1690                 rctl |= E1000_RCTL_SBP;
1691         else
1692                 rctl &= ~E1000_RCTL_SBP;
1693
1694         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1695                 rctl &= ~E1000_RCTL_LPE;
1696         else
1697                 rctl |= E1000_RCTL_LPE;
1698
1699         /* Setup buffer sizes */
1700         rctl &= ~E1000_RCTL_SZ_4096;
1701         rctl |= E1000_RCTL_BSEX;
1702         switch (adapter->rx_buffer_len) {
1703                 case E1000_RXBUFFER_256:
1704                         rctl |= E1000_RCTL_SZ_256;
1705                         rctl &= ~E1000_RCTL_BSEX;
1706                         break;
1707                 case E1000_RXBUFFER_512:
1708                         rctl |= E1000_RCTL_SZ_512;
1709                         rctl &= ~E1000_RCTL_BSEX;
1710                         break;
1711                 case E1000_RXBUFFER_1024:
1712                         rctl |= E1000_RCTL_SZ_1024;
1713                         rctl &= ~E1000_RCTL_BSEX;
1714                         break;
1715                 case E1000_RXBUFFER_2048:
1716                 default:
1717                         rctl |= E1000_RCTL_SZ_2048;
1718                         rctl &= ~E1000_RCTL_BSEX;
1719                         break;
1720                 case E1000_RXBUFFER_4096:
1721                         rctl |= E1000_RCTL_SZ_4096;
1722                         break;
1723                 case E1000_RXBUFFER_8192:
1724                         rctl |= E1000_RCTL_SZ_8192;
1725                         break;
1726                 case E1000_RXBUFFER_16384:
1727                         rctl |= E1000_RCTL_SZ_16384;
1728                         break;
1729         }
1730
1731 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1732         /* 82571 and greater support packet-split where the protocol
1733          * header is placed in skb->data and the packet data is
1734          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1735          * In the case of a non-split, skb->data is linearly filled,
1736          * followed by the page buffers.  Therefore, skb->data is
1737          * sized to hold the largest protocol header.
1738          */
1739         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1740         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1741             PAGE_SIZE <= 16384)
1742                 adapter->rx_ps_pages = pages;
1743         else
1744                 adapter->rx_ps_pages = 0;
1745 #endif
1746         if (adapter->rx_ps_pages) {
1747                 /* Configure extra packet-split registers */
1748                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1749                 rfctl |= E1000_RFCTL_EXTEN;
1750                 /* disable IPv6 packet split support */
1751                 rfctl |= E1000_RFCTL_IPV6_DIS;
1752                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1753
1754                 rctl |= E1000_RCTL_DTYP_PS;
1755
1756                 psrctl |= adapter->rx_ps_bsize0 >>
1757                         E1000_PSRCTL_BSIZE0_SHIFT;
1758
1759                 switch (adapter->rx_ps_pages) {
1760                 case 3:
1761                         psrctl |= PAGE_SIZE <<
1762                                 E1000_PSRCTL_BSIZE3_SHIFT;
1763                 case 2:
1764                         psrctl |= PAGE_SIZE <<
1765                                 E1000_PSRCTL_BSIZE2_SHIFT;
1766                 case 1:
1767                         psrctl |= PAGE_SIZE >>
1768                                 E1000_PSRCTL_BSIZE1_SHIFT;
1769                         break;
1770                 }
1771
1772                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1773         }
1774
1775         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1776 }
1777
1778 /**
1779  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1780  * @adapter: board private structure
1781  *
1782  * Configure the Rx unit of the MAC after a reset.
1783  **/
1784
1785 static void
1786 e1000_configure_rx(struct e1000_adapter *adapter)
1787 {
1788         uint64_t rdba;
1789         struct e1000_hw *hw = &adapter->hw;
1790         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1791
1792         if (adapter->rx_ps_pages) {
1793                 /* this is a 32 byte descriptor */
1794                 rdlen = adapter->rx_ring[0].count *
1795                         sizeof(union e1000_rx_desc_packet_split);
1796                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1797                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1798         } else {
1799                 rdlen = adapter->rx_ring[0].count *
1800                         sizeof(struct e1000_rx_desc);
1801                 adapter->clean_rx = e1000_clean_rx_irq;
1802                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1803         }
1804
1805         /* disable receives while setting up the descriptors */
1806         rctl = E1000_READ_REG(hw, RCTL);
1807         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1808
1809         /* set the Receive Delay Timer Register */
1810         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1811
1812         if (hw->mac_type >= e1000_82540) {
1813                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1814                 if (adapter->itr > 1)
1815                         E1000_WRITE_REG(hw, ITR,
1816                                 1000000000 / (adapter->itr * 256));
1817         }
1818
1819         if (hw->mac_type >= e1000_82571) {
1820                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1821                 /* Reset delay timers after every interrupt */
1822                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1823 #ifdef CONFIG_E1000_NAPI
1824                 /* Auto-Mask interrupts upon ICR read. */
1825                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1826 #endif
1827                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1828                 E1000_WRITE_REG(hw, IAM, ~0);
1829                 E1000_WRITE_FLUSH(hw);
1830         }
1831
1832         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1833          * the Base and Length of the Rx Descriptor Ring */
1834         switch (adapter->num_rx_queues) {
1835         case 1:
1836         default:
1837                 rdba = adapter->rx_ring[0].dma;
1838                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1839                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1840                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1841                 E1000_WRITE_REG(hw, RDT, 0);
1842                 E1000_WRITE_REG(hw, RDH, 0);
1843                 adapter->rx_ring[0].rdh = E1000_RDH;
1844                 adapter->rx_ring[0].rdt = E1000_RDT;
1845                 break;
1846         }
1847
1848         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1849         if (hw->mac_type >= e1000_82543) {
1850                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1851                 if (adapter->rx_csum == TRUE) {
1852                         rxcsum |= E1000_RXCSUM_TUOFL;
1853
1854                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1855                          * Must be used in conjunction with packet-split. */
1856                         if ((hw->mac_type >= e1000_82571) &&
1857                             (adapter->rx_ps_pages)) {
1858                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1859                         }
1860                 } else {
1861                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1862                         /* don't need to clear IPPCSE as it defaults to 0 */
1863                 }
1864                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1865         }
1866
1867         /* Enable Receives */
1868         E1000_WRITE_REG(hw, RCTL, rctl);
1869 }
1870
1871 /**
1872  * e1000_free_tx_resources - Free Tx Resources per Queue
1873  * @adapter: board private structure
1874  * @tx_ring: Tx descriptor ring for a specific queue
1875  *
1876  * Free all transmit software resources
1877  **/
1878
1879 static void
1880 e1000_free_tx_resources(struct e1000_adapter *adapter,
1881                         struct e1000_tx_ring *tx_ring)
1882 {
1883         struct pci_dev *pdev = adapter->pdev;
1884
1885         e1000_clean_tx_ring(adapter, tx_ring);
1886
1887         vfree(tx_ring->buffer_info);
1888         tx_ring->buffer_info = NULL;
1889
1890         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1891
1892         tx_ring->desc = NULL;
1893 }
1894
1895 /**
1896  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1897  * @adapter: board private structure
1898  *
1899  * Free all transmit software resources
1900  **/
1901
1902 void
1903 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1904 {
1905         int i;
1906
1907         for (i = 0; i < adapter->num_tx_queues; i++)
1908                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1909 }
1910
1911 static void
1912 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1913                         struct e1000_buffer *buffer_info)
1914 {
1915         if (buffer_info->dma) {
1916                 pci_unmap_page(adapter->pdev,
1917                                 buffer_info->dma,
1918                                 buffer_info->length,
1919                                 PCI_DMA_TODEVICE);
1920         }
1921         if (buffer_info->skb)
1922                 dev_kfree_skb_any(buffer_info->skb);
1923         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1924 }
1925
1926 /**
1927  * e1000_clean_tx_ring - Free Tx Buffers
1928  * @adapter: board private structure
1929  * @tx_ring: ring to be cleaned
1930  **/
1931
1932 static void
1933 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1934                     struct e1000_tx_ring *tx_ring)
1935 {
1936         struct e1000_buffer *buffer_info;
1937         unsigned long size;
1938         unsigned int i;
1939
1940         /* Free all the Tx ring sk_buffs */
1941
1942         for (i = 0; i < tx_ring->count; i++) {
1943                 buffer_info = &tx_ring->buffer_info[i];
1944                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1945         }
1946
1947         size = sizeof(struct e1000_buffer) * tx_ring->count;
1948         memset(tx_ring->buffer_info, 0, size);
1949
1950         /* Zero out the descriptor ring */
1951
1952         memset(tx_ring->desc, 0, tx_ring->size);
1953
1954         tx_ring->next_to_use = 0;
1955         tx_ring->next_to_clean = 0;
1956         tx_ring->last_tx_tso = 0;
1957
1958         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1959         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1960 }
1961
1962 /**
1963  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1964  * @adapter: board private structure
1965  **/
1966
1967 static void
1968 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1969 {
1970         int i;
1971
1972         for (i = 0; i < adapter->num_tx_queues; i++)
1973                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1974 }
1975
1976 /**
1977  * e1000_free_rx_resources - Free Rx Resources
1978  * @adapter: board private structure
1979  * @rx_ring: ring to clean the resources from
1980  *
1981  * Free all receive software resources
1982  **/
1983
1984 static void
1985 e1000_free_rx_resources(struct e1000_adapter *adapter,
1986                         struct e1000_rx_ring *rx_ring)
1987 {
1988         struct pci_dev *pdev = adapter->pdev;
1989
1990         e1000_clean_rx_ring(adapter, rx_ring);
1991
1992         vfree(rx_ring->buffer_info);
1993         rx_ring->buffer_info = NULL;
1994         kfree(rx_ring->ps_page);
1995         rx_ring->ps_page = NULL;
1996         kfree(rx_ring->ps_page_dma);
1997         rx_ring->ps_page_dma = NULL;
1998
1999         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2000
2001         rx_ring->desc = NULL;
2002 }
2003
2004 /**
2005  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2006  * @adapter: board private structure
2007  *
2008  * Free all receive software resources
2009  **/
2010
2011 void
2012 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2013 {
2014         int i;
2015
2016         for (i = 0; i < adapter->num_rx_queues; i++)
2017                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2018 }
2019
2020 /**
2021  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2022  * @adapter: board private structure
2023  * @rx_ring: ring to free buffers from
2024  **/
2025
2026 static void
2027 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2028                     struct e1000_rx_ring *rx_ring)
2029 {
2030         struct e1000_buffer *buffer_info;
2031         struct e1000_ps_page *ps_page;
2032         struct e1000_ps_page_dma *ps_page_dma;
2033         struct pci_dev *pdev = adapter->pdev;
2034         unsigned long size;
2035         unsigned int i, j;
2036
2037         /* Free all the Rx ring sk_buffs */
2038         for (i = 0; i < rx_ring->count; i++) {
2039                 buffer_info = &rx_ring->buffer_info[i];
2040                 if (buffer_info->skb) {
2041                         pci_unmap_single(pdev,
2042                                          buffer_info->dma,
2043                                          buffer_info->length,
2044                                          PCI_DMA_FROMDEVICE);
2045
2046                         dev_kfree_skb(buffer_info->skb);
2047                         buffer_info->skb = NULL;
2048                 }
2049                 ps_page = &rx_ring->ps_page[i];
2050                 ps_page_dma = &rx_ring->ps_page_dma[i];
2051                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2052                         if (!ps_page->ps_page[j]) break;
2053                         pci_unmap_page(pdev,
2054                                        ps_page_dma->ps_page_dma[j],
2055                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2056                         ps_page_dma->ps_page_dma[j] = 0;
2057                         put_page(ps_page->ps_page[j]);
2058                         ps_page->ps_page[j] = NULL;
2059                 }
2060         }
2061
2062         size = sizeof(struct e1000_buffer) * rx_ring->count;
2063         memset(rx_ring->buffer_info, 0, size);
2064         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2065         memset(rx_ring->ps_page, 0, size);
2066         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2067         memset(rx_ring->ps_page_dma, 0, size);
2068
2069         /* Zero out the descriptor ring */
2070
2071         memset(rx_ring->desc, 0, rx_ring->size);
2072
2073         rx_ring->next_to_clean = 0;
2074         rx_ring->next_to_use = 0;
2075
2076         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2077         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2078 }
2079
2080 /**
2081  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2082  * @adapter: board private structure
2083  **/
2084
2085 static void
2086 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2087 {
2088         int i;
2089
2090         for (i = 0; i < adapter->num_rx_queues; i++)
2091                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2092 }
2093
2094 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2095  * and memory write and invalidate disabled for certain operations
2096  */
2097 static void
2098 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2099 {
2100         struct net_device *netdev = adapter->netdev;
2101         uint32_t rctl;
2102
2103         e1000_pci_clear_mwi(&adapter->hw);
2104
2105         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2106         rctl |= E1000_RCTL_RST;
2107         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2108         E1000_WRITE_FLUSH(&adapter->hw);
2109         mdelay(5);
2110
2111         if (netif_running(netdev))
2112                 e1000_clean_all_rx_rings(adapter);
2113 }
2114
2115 static void
2116 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2117 {
2118         struct net_device *netdev = adapter->netdev;
2119         uint32_t rctl;
2120
2121         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2122         rctl &= ~E1000_RCTL_RST;
2123         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2124         E1000_WRITE_FLUSH(&adapter->hw);
2125         mdelay(5);
2126
2127         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2128                 e1000_pci_set_mwi(&adapter->hw);
2129
2130         if (netif_running(netdev)) {
2131                 /* No need to loop, because 82542 supports only 1 queue */
2132                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2133                 e1000_configure_rx(adapter);
2134                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2135         }
2136 }
2137
2138 /**
2139  * e1000_set_mac - Change the Ethernet Address of the NIC
2140  * @netdev: network interface device structure
2141  * @p: pointer to an address structure
2142  *
2143  * Returns 0 on success, negative on failure
2144  **/
2145
2146 static int
2147 e1000_set_mac(struct net_device *netdev, void *p)
2148 {
2149         struct e1000_adapter *adapter = netdev_priv(netdev);
2150         struct sockaddr *addr = p;
2151
2152         if (!is_valid_ether_addr(addr->sa_data))
2153                 return -EADDRNOTAVAIL;
2154
2155         /* 82542 2.0 needs to be in reset to write receive address registers */
2156
2157         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2158                 e1000_enter_82542_rst(adapter);
2159
2160         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2161         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2162
2163         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2164
2165         /* With 82571 controllers, LAA may be overwritten (with the default)
2166          * due to controller reset from the other port. */
2167         if (adapter->hw.mac_type == e1000_82571) {
2168                 /* activate the work around */
2169                 adapter->hw.laa_is_present = 1;
2170
2171                 /* Hold a copy of the LAA in RAR[14] This is done so that
2172                  * between the time RAR[0] gets clobbered  and the time it
2173                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2174                  * of the RARs and no incoming packets directed to this port
2175                  * are dropped. Eventaully the LAA will be in RAR[0] and
2176                  * RAR[14] */
2177                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2178                                         E1000_RAR_ENTRIES - 1);
2179         }
2180
2181         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2182                 e1000_leave_82542_rst(adapter);
2183
2184         return 0;
2185 }
2186
2187 /**
2188  * e1000_set_multi - Multicast and Promiscuous mode set
2189  * @netdev: network interface device structure
2190  *
2191  * The set_multi entry point is called whenever the multicast address
2192  * list or the network interface flags are updated.  This routine is
2193  * responsible for configuring the hardware for proper multicast,
2194  * promiscuous mode, and all-multi behavior.
2195  **/
2196
2197 static void
2198 e1000_set_multi(struct net_device *netdev)
2199 {
2200         struct e1000_adapter *adapter = netdev_priv(netdev);
2201         struct e1000_hw *hw = &adapter->hw;
2202         struct dev_mc_list *mc_ptr;
2203         uint32_t rctl;
2204         uint32_t hash_value;
2205         int i, rar_entries = E1000_RAR_ENTRIES;
2206         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2207                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2208                                 E1000_NUM_MTA_REGISTERS;
2209
2210         if (adapter->hw.mac_type == e1000_ich8lan)
2211                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2212
2213         /* reserve RAR[14] for LAA over-write work-around */
2214         if (adapter->hw.mac_type == e1000_82571)
2215                 rar_entries--;
2216
2217         /* Check for Promiscuous and All Multicast modes */
2218
2219         rctl = E1000_READ_REG(hw, RCTL);
2220
2221         if (netdev->flags & IFF_PROMISC) {
2222                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2223         } else if (netdev->flags & IFF_ALLMULTI) {
2224                 rctl |= E1000_RCTL_MPE;
2225                 rctl &= ~E1000_RCTL_UPE;
2226         } else {
2227                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2228         }
2229
2230         E1000_WRITE_REG(hw, RCTL, rctl);
2231
2232         /* 82542 2.0 needs to be in reset to write receive address registers */
2233
2234         if (hw->mac_type == e1000_82542_rev2_0)
2235                 e1000_enter_82542_rst(adapter);
2236
2237         /* load the first 14 multicast address into the exact filters 1-14
2238          * RAR 0 is used for the station MAC adddress
2239          * if there are not 14 addresses, go ahead and clear the filters
2240          * -- with 82571 controllers only 0-13 entries are filled here
2241          */
2242         mc_ptr = netdev->mc_list;
2243
2244         for (i = 1; i < rar_entries; i++) {
2245                 if (mc_ptr) {
2246                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2247                         mc_ptr = mc_ptr->next;
2248                 } else {
2249                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2250                         E1000_WRITE_FLUSH(hw);
2251                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2252                         E1000_WRITE_FLUSH(hw);
2253                 }
2254         }
2255
2256         /* clear the old settings from the multicast hash table */
2257
2258         for (i = 0; i < mta_reg_count; i++) {
2259                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2260                 E1000_WRITE_FLUSH(hw);
2261         }
2262
2263         /* load any remaining addresses into the hash table */
2264
2265         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2266                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2267                 e1000_mta_set(hw, hash_value);
2268         }
2269
2270         if (hw->mac_type == e1000_82542_rev2_0)
2271                 e1000_leave_82542_rst(adapter);
2272 }
2273
2274 /* Need to wait a few seconds after link up to get diagnostic information from
2275  * the phy */
2276
2277 static void
2278 e1000_update_phy_info(unsigned long data)
2279 {
2280         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2281         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2282 }
2283
2284 /**
2285  * e1000_82547_tx_fifo_stall - Timer Call-back
2286  * @data: pointer to adapter cast into an unsigned long
2287  **/
2288
2289 static void
2290 e1000_82547_tx_fifo_stall(unsigned long data)
2291 {
2292         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2293         struct net_device *netdev = adapter->netdev;
2294         uint32_t tctl;
2295
2296         if (atomic_read(&adapter->tx_fifo_stall)) {
2297                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2298                     E1000_READ_REG(&adapter->hw, TDH)) &&
2299                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2300                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2301                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2302                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2303                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2304                         E1000_WRITE_REG(&adapter->hw, TCTL,
2305                                         tctl & ~E1000_TCTL_EN);
2306                         E1000_WRITE_REG(&adapter->hw, TDFT,
2307                                         adapter->tx_head_addr);
2308                         E1000_WRITE_REG(&adapter->hw, TDFH,
2309                                         adapter->tx_head_addr);
2310                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2311                                         adapter->tx_head_addr);
2312                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2313                                         adapter->tx_head_addr);
2314                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2315                         E1000_WRITE_FLUSH(&adapter->hw);
2316
2317                         adapter->tx_fifo_head = 0;
2318                         atomic_set(&adapter->tx_fifo_stall, 0);
2319                         netif_wake_queue(netdev);
2320                 } else {
2321                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2322                 }
2323         }
2324 }
2325
2326 /**
2327  * e1000_watchdog - Timer Call-back
2328  * @data: pointer to adapter cast into an unsigned long
2329  **/
2330 static void
2331 e1000_watchdog(unsigned long data)
2332 {
2333         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2334         struct net_device *netdev = adapter->netdev;
2335         struct e1000_tx_ring *txdr = adapter->tx_ring;
2336         uint32_t link, tctl;
2337         int32_t ret_val;
2338
2339         ret_val = e1000_check_for_link(&adapter->hw);
2340         if ((ret_val == E1000_ERR_PHY) &&
2341             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2342             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2343                 /* See e1000_kumeran_lock_loss_workaround() */
2344                 DPRINTK(LINK, INFO,
2345                         "Gigabit has been disabled, downgrading speed\n");
2346         }
2347         if (adapter->hw.mac_type == e1000_82573) {
2348                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2349                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2350                         e1000_update_mng_vlan(adapter);
2351         }
2352
2353         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2354            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2355                 link = !adapter->hw.serdes_link_down;
2356         else
2357                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2358
2359         if (link) {
2360                 if (!netif_carrier_ok(netdev)) {
2361                         boolean_t txb2b = 1;
2362                         e1000_get_speed_and_duplex(&adapter->hw,
2363                                                    &adapter->link_speed,
2364                                                    &adapter->link_duplex);
2365
2366                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2367                                adapter->link_speed,
2368                                adapter->link_duplex == FULL_DUPLEX ?
2369                                "Full Duplex" : "Half Duplex");
2370
2371                         /* tweak tx_queue_len according to speed/duplex
2372                          * and adjust the timeout factor */
2373                         netdev->tx_queue_len = adapter->tx_queue_len;
2374                         adapter->tx_timeout_factor = 1;
2375                         switch (adapter->link_speed) {
2376                         case SPEED_10:
2377                                 txb2b = 0;
2378                                 netdev->tx_queue_len = 10;
2379                                 adapter->tx_timeout_factor = 8;
2380                                 break;
2381                         case SPEED_100:
2382                                 txb2b = 0;
2383                                 netdev->tx_queue_len = 100;
2384                                 /* maybe add some timeout factor ? */
2385                                 break;
2386                         }
2387
2388                         if ((adapter->hw.mac_type == e1000_82571 ||
2389                              adapter->hw.mac_type == e1000_82572) &&
2390                             txb2b == 0) {
2391 #define SPEED_MODE_BIT (1 << 21)
2392                                 uint32_t tarc0;
2393                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2394                                 tarc0 &= ~SPEED_MODE_BIT;
2395                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2396                         }
2397
2398 #ifdef NETIF_F_TSO
2399                         /* disable TSO for pcie and 10/100 speeds, to avoid
2400                          * some hardware issues */
2401                         if (!adapter->tso_force &&
2402                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2403                                 switch (adapter->link_speed) {
2404                                 case SPEED_10:
2405                                 case SPEED_100:
2406                                         DPRINTK(PROBE,INFO,
2407                                         "10/100 speed: disabling TSO\n");
2408                                         netdev->features &= ~NETIF_F_TSO;
2409                                         break;
2410                                 case SPEED_1000:
2411                                         netdev->features |= NETIF_F_TSO;
2412                                         break;
2413                                 default:
2414                                         /* oops */
2415                                         break;
2416                                 }
2417                         }
2418 #endif
2419
2420                         /* enable transmits in the hardware, need to do this
2421                          * after setting TARC0 */
2422                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2423                         tctl |= E1000_TCTL_EN;
2424                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2425
2426                         netif_carrier_on(netdev);
2427                         netif_wake_queue(netdev);
2428                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2429                         adapter->smartspeed = 0;
2430                 }
2431         } else {
2432                 if (netif_carrier_ok(netdev)) {
2433                         adapter->link_speed = 0;
2434                         adapter->link_duplex = 0;
2435                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2436                         netif_carrier_off(netdev);
2437                         netif_stop_queue(netdev);
2438                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2439
2440                         /* 80003ES2LAN workaround--
2441                          * For packet buffer work-around on link down event;
2442                          * disable receives in the ISR and
2443                          * reset device here in the watchdog
2444                          */
2445                         if (adapter->hw.mac_type == e1000_80003es2lan) {
2446                                 /* reset device */
2447                                 schedule_work(&adapter->reset_task);
2448                         }
2449                 }
2450
2451                 e1000_smartspeed(adapter);
2452         }
2453
2454         e1000_update_stats(adapter);
2455
2456         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2457         adapter->tpt_old = adapter->stats.tpt;
2458         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2459         adapter->colc_old = adapter->stats.colc;
2460
2461         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2462         adapter->gorcl_old = adapter->stats.gorcl;
2463         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2464         adapter->gotcl_old = adapter->stats.gotcl;
2465
2466         e1000_update_adaptive(&adapter->hw);
2467
2468         if (!netif_carrier_ok(netdev)) {
2469                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2470                         /* We've lost link, so the controller stops DMA,
2471                          * but we've got queued Tx work that's never going
2472                          * to get done, so reset controller to flush Tx.
2473                          * (Do the reset outside of interrupt context). */
2474                         adapter->tx_timeout_count++;
2475                         schedule_work(&adapter->reset_task);
2476                 }
2477         }
2478
2479         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2480         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2481                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2482                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2483                  * else is between 2000-8000. */
2484                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2485                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2486                         adapter->gotcl - adapter->gorcl :
2487                         adapter->gorcl - adapter->gotcl) / 10000;
2488                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2489                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2490         }
2491
2492         /* Cause software interrupt to ensure rx ring is cleaned */
2493         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2494
2495         /* Force detection of hung controller every watchdog period */
2496         adapter->detect_tx_hung = TRUE;
2497
2498         /* With 82571 controllers, LAA may be overwritten due to controller
2499          * reset from the other port. Set the appropriate LAA in RAR[0] */
2500         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2501                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2502
2503         /* Reset the timer */
2504         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2505 }
2506
2507 #define E1000_TX_FLAGS_CSUM             0x00000001
2508 #define E1000_TX_FLAGS_VLAN             0x00000002
2509 #define E1000_TX_FLAGS_TSO              0x00000004
2510 #define E1000_TX_FLAGS_IPV4             0x00000008
2511 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2512 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2513
2514 static int
2515 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2516           struct sk_buff *skb)
2517 {
2518 #ifdef NETIF_F_TSO
2519         struct e1000_context_desc *context_desc;
2520         struct e1000_buffer *buffer_info;
2521         unsigned int i;
2522         uint32_t cmd_length = 0;
2523         uint16_t ipcse = 0, tucse, mss;
2524         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2525         int err;
2526
2527         if (skb_shinfo(skb)->tso_size) {
2528                 if (skb_header_cloned(skb)) {
2529                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2530                         if (err)
2531                                 return err;
2532                 }
2533
2534                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2535                 mss = skb_shinfo(skb)->tso_size;
2536                 if (skb->protocol == htons(ETH_P_IP)) {
2537                         skb->nh.iph->tot_len = 0;
2538                         skb->nh.iph->check = 0;
2539                         skb->h.th->check =
2540                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2541                                                    skb->nh.iph->daddr,
2542                                                    0,
2543                                                    IPPROTO_TCP,
2544                                                    0);
2545                         cmd_length = E1000_TXD_CMD_IP;
2546                         ipcse = skb->h.raw - skb->data - 1;
2547 #ifdef NETIF_F_TSO_IPV6
2548                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2549                         skb->nh.ipv6h->payload_len = 0;
2550                         skb->h.th->check =
2551                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2552                                                  &skb->nh.ipv6h->daddr,
2553                                                  0,
2554                                                  IPPROTO_TCP,
2555                                                  0);
2556                         ipcse = 0;
2557 #endif
2558                 }
2559                 ipcss = skb->nh.raw - skb->data;
2560                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2561                 tucss = skb->h.raw - skb->data;
2562                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2563                 tucse = 0;
2564
2565                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2566                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2567
2568                 i = tx_ring->next_to_use;
2569                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2570                 buffer_info = &tx_ring->buffer_info[i];
2571
2572                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2573                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2574                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2575                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2576                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2577                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2578                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2579                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2580                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2581
2582                 buffer_info->time_stamp = jiffies;
2583
2584                 if (++i == tx_ring->count) i = 0;
2585                 tx_ring->next_to_use = i;
2586
2587                 return TRUE;
2588         }
2589 #endif
2590
2591         return FALSE;
2592 }
2593
2594 static boolean_t
2595 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2596               struct sk_buff *skb)
2597 {
2598         struct e1000_context_desc *context_desc;
2599         struct e1000_buffer *buffer_info;
2600         unsigned int i;
2601         uint8_t css;
2602
2603         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2604                 css = skb->h.raw - skb->data;
2605
2606                 i = tx_ring->next_to_use;
2607                 buffer_info = &tx_ring->buffer_info[i];
2608                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2609
2610                 context_desc->upper_setup.tcp_fields.tucss = css;
2611                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2612                 context_desc->upper_setup.tcp_fields.tucse = 0;
2613                 context_desc->tcp_seg_setup.data = 0;
2614                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2615
2616                 buffer_info->time_stamp = jiffies;
2617
2618                 if (unlikely(++i == tx_ring->count)) i = 0;
2619                 tx_ring->next_to_use = i;
2620
2621                 return TRUE;
2622         }
2623
2624         return FALSE;
2625 }
2626
2627 #define E1000_MAX_TXD_PWR       12
2628 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2629
2630 static int
2631 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2632              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2633              unsigned int nr_frags, unsigned int mss)
2634 {
2635         struct e1000_buffer *buffer_info;
2636         unsigned int len = skb->len;
2637         unsigned int offset = 0, size, count = 0, i;
2638         unsigned int f;
2639         len -= skb->data_len;
2640
2641         i = tx_ring->next_to_use;
2642
2643         while (len) {
2644                 buffer_info = &tx_ring->buffer_info[i];
2645                 size = min(len, max_per_txd);
2646 #ifdef NETIF_F_TSO
2647                 /* Workaround for Controller erratum --
2648                  * descriptor for non-tso packet in a linear SKB that follows a
2649                  * tso gets written back prematurely before the data is fully
2650                  * DMA'd to the controller */
2651                 if (!skb->data_len && tx_ring->last_tx_tso &&
2652                     !skb_shinfo(skb)->tso_size) {
2653                         tx_ring->last_tx_tso = 0;
2654                         size -= 4;
2655                 }
2656
2657                 /* Workaround for premature desc write-backs
2658                  * in TSO mode.  Append 4-byte sentinel desc */
2659                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2660                         size -= 4;
2661 #endif
2662                 /* work-around for errata 10 and it applies
2663                  * to all controllers in PCI-X mode
2664                  * The fix is to make sure that the first descriptor of a
2665                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2666                  */
2667                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2668                                 (size > 2015) && count == 0))
2669                         size = 2015;
2670
2671                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2672                  * terminating buffers within evenly-aligned dwords. */
2673                 if (unlikely(adapter->pcix_82544 &&
2674                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2675                    size > 4))
2676                         size -= 4;
2677
2678                 buffer_info->length = size;
2679                 buffer_info->dma =
2680                         pci_map_single(adapter->pdev,
2681                                 skb->data + offset,
2682                                 size,
2683                                 PCI_DMA_TODEVICE);
2684                 buffer_info->time_stamp = jiffies;
2685
2686                 len -= size;
2687                 offset += size;
2688                 count++;
2689                 if (unlikely(++i == tx_ring->count)) i = 0;
2690         }
2691
2692         for (f = 0; f < nr_frags; f++) {
2693                 struct skb_frag_struct *frag;
2694
2695                 frag = &skb_shinfo(skb)->frags[f];
2696                 len = frag->size;
2697                 offset = frag->page_offset;
2698
2699                 while (len) {
2700                         buffer_info = &tx_ring->buffer_info[i];
2701                         size = min(len, max_per_txd);
2702 #ifdef NETIF_F_TSO
2703                         /* Workaround for premature desc write-backs
2704                          * in TSO mode.  Append 4-byte sentinel desc */
2705                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2706                                 size -= 4;
2707 #endif
2708                         /* Workaround for potential 82544 hang in PCI-X.
2709                          * Avoid terminating buffers within evenly-aligned
2710                          * dwords. */
2711                         if (unlikely(adapter->pcix_82544 &&
2712                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2713                            size > 4))
2714                                 size -= 4;
2715
2716                         buffer_info->length = size;
2717                         buffer_info->dma =
2718                                 pci_map_page(adapter->pdev,
2719                                         frag->page,
2720                                         offset,
2721                                         size,
2722                                         PCI_DMA_TODEVICE);
2723                         buffer_info->time_stamp = jiffies;
2724
2725                         len -= size;
2726                         offset += size;
2727                         count++;
2728                         if (unlikely(++i == tx_ring->count)) i = 0;
2729                 }
2730         }
2731
2732         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2733         tx_ring->buffer_info[i].skb = skb;
2734         tx_ring->buffer_info[first].next_to_watch = i;
2735
2736         return count;
2737 }
2738
2739 static void
2740 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2741                int tx_flags, int count)
2742 {
2743         struct e1000_tx_desc *tx_desc = NULL;
2744         struct e1000_buffer *buffer_info;
2745         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2746         unsigned int i;
2747
2748         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2749                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2750                              E1000_TXD_CMD_TSE;
2751                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2752
2753                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2754                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2755         }
2756
2757         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2758                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2759                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2760         }
2761
2762         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2763                 txd_lower |= E1000_TXD_CMD_VLE;
2764                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2765         }
2766
2767         i = tx_ring->next_to_use;
2768
2769         while (count--) {
2770                 buffer_info = &tx_ring->buffer_info[i];
2771                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2772                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2773                 tx_desc->lower.data =
2774                         cpu_to_le32(txd_lower | buffer_info->length);
2775                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2776                 if (unlikely(++i == tx_ring->count)) i = 0;
2777         }
2778
2779         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2780
2781         /* Force memory writes to complete before letting h/w
2782          * know there are new descriptors to fetch.  (Only
2783          * applicable for weak-ordered memory model archs,
2784          * such as IA-64). */
2785         wmb();
2786
2787         tx_ring->next_to_use = i;
2788         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2789 }
2790
2791 /**
2792  * 82547 workaround to avoid controller hang in half-duplex environment.
2793  * The workaround is to avoid queuing a large packet that would span
2794  * the internal Tx FIFO ring boundary by notifying the stack to resend
2795  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2796  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2797  * to the beginning of the Tx FIFO.
2798  **/
2799
2800 #define E1000_FIFO_HDR                  0x10
2801 #define E1000_82547_PAD_LEN             0x3E0
2802
2803 static int
2804 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2805 {
2806         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2807         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2808
2809         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2810
2811         if (adapter->link_duplex != HALF_DUPLEX)
2812                 goto no_fifo_stall_required;
2813
2814         if (atomic_read(&adapter->tx_fifo_stall))
2815                 return 1;
2816
2817         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2818                 atomic_set(&adapter->tx_fifo_stall, 1);
2819                 return 1;
2820         }
2821
2822 no_fifo_stall_required:
2823         adapter->tx_fifo_head += skb_fifo_len;
2824         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2825                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2826         return 0;
2827 }
2828
2829 #define MINIMUM_DHCP_PACKET_SIZE 282
2830 static int
2831 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2832 {
2833         struct e1000_hw *hw =  &adapter->hw;
2834         uint16_t length, offset;
2835         if (vlan_tx_tag_present(skb)) {
2836                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2837                         ( adapter->hw.mng_cookie.status &
2838                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2839                         return 0;
2840         }
2841         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2842                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2843                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2844                         const struct iphdr *ip =
2845                                 (struct iphdr *)((uint8_t *)skb->data+14);
2846                         if (IPPROTO_UDP == ip->protocol) {
2847                                 struct udphdr *udp =
2848                                         (struct udphdr *)((uint8_t *)ip +
2849                                                 (ip->ihl << 2));
2850                                 if (ntohs(udp->dest) == 67) {
2851                                         offset = (uint8_t *)udp + 8 - skb->data;
2852                                         length = skb->len - offset;
2853
2854                                         return e1000_mng_write_dhcp_info(hw,
2855                                                         (uint8_t *)udp + 8,
2856                                                         length);
2857                                 }
2858                         }
2859                 }
2860         }
2861         return 0;
2862 }
2863
2864 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2865 static int
2866 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2867 {
2868         struct e1000_adapter *adapter = netdev_priv(netdev);
2869         struct e1000_tx_ring *tx_ring;
2870         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2871         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2872         unsigned int tx_flags = 0;
2873         unsigned int len = skb->len;
2874         unsigned long flags;
2875         unsigned int nr_frags = 0;
2876         unsigned int mss = 0;
2877         int count = 0;
2878         int tso;
2879         unsigned int f;
2880         len -= skb->data_len;
2881
2882         tx_ring = adapter->tx_ring;
2883
2884         if (unlikely(skb->len <= 0)) {
2885                 dev_kfree_skb_any(skb);
2886                 return NETDEV_TX_OK;
2887         }
2888
2889 #ifdef NETIF_F_TSO
2890         mss = skb_shinfo(skb)->tso_size;
2891         /* The controller does a simple calculation to
2892          * make sure there is enough room in the FIFO before
2893          * initiating the DMA for each buffer.  The calc is:
2894          * 4 = ceil(buffer len/mss).  To make sure we don't
2895          * overrun the FIFO, adjust the max buffer len if mss
2896          * drops. */
2897         if (mss) {
2898                 uint8_t hdr_len;
2899                 max_per_txd = min(mss << 2, max_per_txd);
2900                 max_txd_pwr = fls(max_per_txd) - 1;
2901
2902         /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2903          * points to just header, pull a few bytes of payload from
2904          * frags into skb->data */
2905                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2906                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2907                         switch (adapter->hw.mac_type) {
2908                                 unsigned int pull_size;
2909                         case e1000_82571:
2910                         case e1000_82572:
2911                         case e1000_82573:
2912                         case e1000_ich8lan:
2913                                 pull_size = min((unsigned int)4, skb->data_len);
2914                                 if (!__pskb_pull_tail(skb, pull_size)) {
2915                                         DPRINTK(DRV, ERR,
2916                                                 "__pskb_pull_tail failed.\n");
2917                                         dev_kfree_skb_any(skb);
2918                                         return NETDEV_TX_OK;
2919                                 }
2920                                 len = skb->len - skb->data_len;
2921                                 break;
2922                         default:
2923                                 /* do nothing */
2924                                 break;
2925                         }
2926                 }
2927         }
2928
2929         /* reserve a descriptor for the offload context */
2930         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2931                 count++;
2932         count++;
2933 #else
2934         if (skb->ip_summed == CHECKSUM_HW)
2935                 count++;
2936 #endif
2937
2938 #ifdef NETIF_F_TSO
2939         /* Controller Erratum workaround */
2940         if (!skb->data_len && tx_ring->last_tx_tso &&
2941             !skb_shinfo(skb)->tso_size)
2942                 count++;
2943 #endif
2944
2945         count += TXD_USE_COUNT(len, max_txd_pwr);
2946
2947         if (adapter->pcix_82544)
2948                 count++;
2949
2950         /* work-around for errata 10 and it applies to all controllers
2951          * in PCI-X mode, so add one more descriptor to the count
2952          */
2953         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2954                         (len > 2015)))
2955                 count++;
2956
2957         nr_frags = skb_shinfo(skb)->nr_frags;
2958         for (f = 0; f < nr_frags; f++)
2959                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2960                                        max_txd_pwr);
2961         if (adapter->pcix_82544)
2962                 count += nr_frags;
2963
2964
2965         if (adapter->hw.tx_pkt_filtering &&
2966             (adapter->hw.mac_type == e1000_82573))
2967                 e1000_transfer_dhcp_info(adapter, skb);
2968
2969         local_irq_save(flags);
2970         if (!spin_trylock(&tx_ring->tx_lock)) {
2971                 /* Collision - tell upper layer to requeue */
2972                 local_irq_restore(flags);
2973                 return NETDEV_TX_LOCKED;
2974         }
2975
2976         /* need: count + 2 desc gap to keep tail from touching
2977          * head, otherwise try next time */
2978         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2979                 netif_stop_queue(netdev);
2980                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2981                 return NETDEV_TX_BUSY;
2982         }
2983
2984         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2985                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2986                         netif_stop_queue(netdev);
2987                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2988                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2989                         return NETDEV_TX_BUSY;
2990                 }
2991         }
2992
2993         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2994                 tx_flags |= E1000_TX_FLAGS_VLAN;
2995                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2996         }
2997
2998         first = tx_ring->next_to_use;
2999
3000         tso = e1000_tso(adapter, tx_ring, skb);
3001         if (tso < 0) {
3002                 dev_kfree_skb_any(skb);
3003                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3004                 return NETDEV_TX_OK;
3005         }
3006
3007         if (likely(tso)) {
3008                 tx_ring->last_tx_tso = 1;
3009                 tx_flags |= E1000_TX_FLAGS_TSO;
3010         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3011                 tx_flags |= E1000_TX_FLAGS_CSUM;
3012
3013         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3014          * 82571 hardware supports TSO capabilities for IPv6 as well...
3015          * no longer assume, we must. */
3016         if (likely(skb->protocol == htons(ETH_P_IP)))
3017                 tx_flags |= E1000_TX_FLAGS_IPV4;
3018
3019         e1000_tx_queue(adapter, tx_ring, tx_flags,
3020                        e1000_tx_map(adapter, tx_ring, skb, first,
3021                                     max_per_txd, nr_frags, mss));
3022
3023         netdev->trans_start = jiffies;
3024
3025         /* Make sure there is space in the ring for the next send. */
3026         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
3027                 netif_stop_queue(netdev);
3028
3029         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3030         return NETDEV_TX_OK;
3031 }
3032
3033 /**
3034  * e1000_tx_timeout - Respond to a Tx Hang
3035  * @netdev: network interface device structure
3036  **/
3037
3038 static void
3039 e1000_tx_timeout(struct net_device *netdev)
3040 {
3041         struct e1000_adapter *adapter = netdev_priv(netdev);
3042
3043         /* Do the reset outside of interrupt context */
3044         adapter->tx_timeout_count++;
3045         schedule_work(&adapter->reset_task);
3046 }
3047
3048 static void
3049 e1000_reset_task(struct net_device *netdev)
3050 {
3051         struct e1000_adapter *adapter = netdev_priv(netdev);
3052
3053         e1000_reinit_locked(adapter);
3054 }
3055
3056 /**
3057  * e1000_get_stats - Get System Network Statistics
3058  * @netdev: network interface device structure
3059  *
3060  * Returns the address of the device statistics structure.
3061  * The statistics are actually updated from the timer callback.
3062  **/
3063
3064 static struct net_device_stats *
3065 e1000_get_stats(struct net_device *netdev)
3066 {
3067         struct e1000_adapter *adapter = netdev_priv(netdev);
3068
3069         /* only return the current stats */
3070         return &adapter->net_stats;
3071 }
3072
3073 /**
3074  * e1000_change_mtu - Change the Maximum Transfer Unit
3075  * @netdev: network interface device structure
3076  * @new_mtu: new value for maximum frame size
3077  *
3078  * Returns 0 on success, negative on failure
3079  **/
3080
3081 static int
3082 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3083 {
3084         struct e1000_adapter *adapter = netdev_priv(netdev);
3085         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3086         uint16_t eeprom_data = 0;
3087
3088         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3089             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3090                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3091                 return -EINVAL;
3092         }
3093
3094         /* Adapter-specific max frame size limits. */
3095         switch (adapter->hw.mac_type) {
3096         case e1000_undefined ... e1000_82542_rev2_1:
3097         case e1000_ich8lan:
3098                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3099                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3100                         return -EINVAL;
3101                 }
3102                 break;
3103         case e1000_82573:
3104                 /* only enable jumbo frames if ASPM is disabled completely
3105                  * this means both bits must be zero in 0x1A bits 3:2 */
3106                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3107                                   &eeprom_data);
3108                 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3109                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3110                                 DPRINTK(PROBE, ERR,
3111                                         "Jumbo Frames not supported.\n");
3112                                 return -EINVAL;
3113                         }
3114                         break;
3115                 }
3116                 /* fall through to get support */
3117         case e1000_82571:
3118         case e1000_82572:
3119         case e1000_80003es2lan:
3120 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3121                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3122                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3123                         return -EINVAL;
3124                 }
3125                 break;
3126         default:
3127                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3128                 break;
3129         }
3130
3131         /* NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3132          * means we reserve 2 more, this pushes us to allocate from the next
3133          * larger slab size
3134          * i.e. RXBUFFER_2048 --> size-4096 slab */
3135
3136         if (max_frame <= E1000_RXBUFFER_256)
3137                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3138         else if (max_frame <= E1000_RXBUFFER_512)
3139                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3140         else if (max_frame <= E1000_RXBUFFER_1024)
3141                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3142         else if (max_frame <= E1000_RXBUFFER_2048)
3143                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3144         else if (max_frame <= E1000_RXBUFFER_4096)
3145                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3146         else if (max_frame <= E1000_RXBUFFER_8192)
3147                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3148         else if (max_frame <= E1000_RXBUFFER_16384)
3149                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3150
3151         /* adjust allocation if LPE protects us, and we aren't using SBP */
3152 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
3153         if (!adapter->hw.tbi_compatibility_on &&
3154             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3155              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3156                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3157
3158         netdev->mtu = new_mtu;
3159
3160         if (netif_running(netdev))
3161                 e1000_reinit_locked(adapter);
3162
3163         adapter->hw.max_frame_size = max_frame;
3164
3165         return 0;
3166 }
3167
3168 /**
3169  * e1000_update_stats - Update the board statistics counters
3170  * @adapter: board private structure
3171  **/
3172
3173 void
3174 e1000_update_stats(struct e1000_adapter *adapter)
3175 {
3176         struct e1000_hw *hw = &adapter->hw;
3177         struct pci_dev *pdev = adapter->pdev;
3178         unsigned long flags;
3179         uint16_t phy_tmp;
3180
3181 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3182
3183         /*
3184          * Prevent stats update while adapter is being reset, or if the pci
3185          * connection is down.
3186          */
3187         if (adapter->link_speed == 0)
3188                 return;
3189         if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3190                 return;
3191
3192         spin_lock_irqsave(&adapter->stats_lock, flags);
3193
3194         /* these counters are modified from e1000_adjust_tbi_stats,
3195          * called from the interrupt context, so they must only
3196          * be written while holding adapter->stats_lock
3197          */
3198
3199         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3200         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3201         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3202         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3203         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3204         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3205         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3206
3207         if (adapter->hw.mac_type != e1000_ich8lan) {
3208         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3209         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3210         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3211         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3212         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3213         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3214         }
3215
3216         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3217         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3218         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3219         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3220         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3221         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3222         adapter->stats.dc += E1000_READ_REG(hw, DC);
3223         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3224         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3225         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3226         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);