drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30 #include <net/ip6_checksum.h>
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #ifndef CONFIG_E1000_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION "7.3.15-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(0x10A4),
 103         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 104         INTEL_E1000_ETHERNET_DEVICE(0x10B9),
 105         INTEL_E1000_ETHERNET_DEVICE(0x10BA),
 106         INTEL_E1000_ETHERNET_DEVICE(0x10BB),
 107         INTEL_E1000_ETHERNET_DEVICE(0x10BC),
 108         INTEL_E1000_ETHERNET_DEVICE(0x10C4),
 109         INTEL_E1000_ETHERNET_DEVICE(0x10C5),
 110         /* required last entry */
 111         {0,}
 112 };
 113
 114 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 115
 116 int e1000_up(struct e1000_adapter *adapter);
 117 void e1000_down(struct e1000_adapter *adapter);
 118 void e1000_reinit_locked(struct e1000_adapter *adapter);
 119 void e1000_reset(struct e1000_adapter *adapter);
 120 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 121 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 122 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 123 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 124 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 125 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 126                              struct e1000_tx_ring *txdr);
 127 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 128                              struct e1000_rx_ring *rxdr);
 129 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 130                              struct e1000_tx_ring *tx_ring);
 131 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 132                              struct e1000_rx_ring *rx_ring);
 133 void e1000_update_stats(struct e1000_adapter *adapter);
 134
 135 static int e1000_init_module(void);
 136 static void e1000_exit_module(void);
 137 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 138 static void __devexit e1000_remove(struct pci_dev *pdev);
 139 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 140 static int e1000_sw_init(struct e1000_adapter *adapter);
 141 static int e1000_open(struct net_device *netdev);
 142 static int e1000_close(struct net_device *netdev);
 143 static void e1000_configure_tx(struct e1000_adapter *adapter);
 144 static void e1000_configure_rx(struct e1000_adapter *adapter);
 145 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 146 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 147 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 148 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 149                                 struct e1000_tx_ring *tx_ring);
 150 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 151                                 struct e1000_rx_ring *rx_ring);
 152 static void e1000_set_multi(struct net_device *netdev);
 153 static void e1000_update_phy_info(unsigned long data);
 154 static void e1000_watchdog(unsigned long data);
 155 static void e1000_82547_tx_fifo_stall(unsigned long data);
 156 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 157 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 158 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 159 static int e1000_set_mac(struct net_device *netdev, void *p);
 160 static irqreturn_t e1000_intr(int irq, void *data);
 161 #ifdef CONFIG_PCI_MSI
 162 static irqreturn_t e1000_intr_msi(int irq, void *data);
 163 #endif
 164 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 165                                     struct e1000_tx_ring *tx_ring);
 166 #ifdef CONFIG_E1000_NAPI
 167 static int e1000_clean(struct net_device *poll_dev, int *budget);
 168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 169                                     struct e1000_rx_ring *rx_ring,
 170                                     int *work_done, int work_to_do);
 171 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 172                                        struct e1000_rx_ring *rx_ring,
 173                                        int *work_done, int work_to_do);
 174 #else
 175 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 176                                     struct e1000_rx_ring *rx_ring);
 177 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 178                                        struct e1000_rx_ring *rx_ring);
 179 #endif
 180 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 181                                    struct e1000_rx_ring *rx_ring,
 182                                    int cleaned_count);
 183 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 184                                       struct e1000_rx_ring *rx_ring,
 185                                       int cleaned_count);
 186 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 187 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 188                            int cmd);
 189 void e1000_set_ethtool_ops(struct net_device *netdev);
 190 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 191 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 192 static void e1000_tx_timeout(struct net_device *dev);
 193 static void e1000_reset_task(struct work_struct *work);
 194 static void e1000_smartspeed(struct e1000_adapter *adapter);
 195 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 196                                        struct sk_buff *skb);
 197
 198 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 199 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 200 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 201 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 202
 203 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 204 #ifdef CONFIG_PM
 205 static int e1000_resume(struct pci_dev *pdev);
 206 #endif
 207 static void e1000_shutdown(struct pci_dev *pdev);
 208
 209 #ifdef CONFIG_NET_POLL_CONTROLLER
 210 /* for netdump / net console */
 211 static void e1000_netpoll (struct net_device *netdev);
 212 #endif
 213
 214 extern void e1000_check_options(struct e1000_adapter *adapter);
 215
 216 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 217                      pci_channel_state_t state);
 218 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 219 static void e1000_io_resume(struct pci_dev *pdev);
 220
 221 static struct pci_error_handlers e1000_err_handler = {
 222         .error_detected = e1000_io_error_detected,
 223         .slot_reset = e1000_io_slot_reset,
 224         .resume = e1000_io_resume,
 225 };
 226
 227 static struct pci_driver e1000_driver = {
 228         .name     = e1000_driver_name,
 229         .id_table = e1000_pci_tbl,
 230         .probe    = e1000_probe,
 231         .remove   = __devexit_p(e1000_remove),
 232 #ifdef CONFIG_PM
 233         /* Power Managment Hooks */
 234         .suspend  = e1000_suspend,
 235         .resume   = e1000_resume,
 236 #endif
 237         .shutdown = e1000_shutdown,
 238         .err_handler = &e1000_err_handler
 239 };
 240
 241 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 242 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 243 MODULE_LICENSE("GPL");
 244 MODULE_VERSION(DRV_VERSION);
 245
 246 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 247 module_param(debug, int, 0);
 248 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 249
 250 /**
 251  * e1000_init_module - Driver Registration Routine
 252  *
 253  * e1000_init_module is the first routine called when the driver is
 254  * loaded. All it does is register with the PCI subsystem.
 255  **/
 256
 257 static int __init
 258 e1000_init_module(void)
 259 {
 260         int ret;
 261         printk(KERN_INFO "%s - version %s\n",
 262                e1000_driver_string, e1000_driver_version);
 263
 264         printk(KERN_INFO "%s\n", e1000_copyright);
 265
 266         ret = pci_register_driver(&e1000_driver);
 267
 268         return ret;
 269 }
 270
 271 module_init(e1000_init_module);
 272
 273 /**
 274  * e1000_exit_module - Driver Exit Cleanup Routine
 275  *
 276  * e1000_exit_module is called just before the driver is removed
 277  * from memory.
 278  **/
 279
 280 static void __exit
 281 e1000_exit_module(void)
 282 {
 283         pci_unregister_driver(&e1000_driver);
 284 }
 285
 286 module_exit(e1000_exit_module);
 287
 288 static int e1000_request_irq(struct e1000_adapter *adapter)
 289 {
 290         struct net_device *netdev = adapter->netdev;
 291         int flags, err = 0;
 292
 293         flags = IRQF_SHARED;
 294 #ifdef CONFIG_PCI_MSI
 295         if (adapter->hw.mac_type >= e1000_82571) {
 296                 adapter->have_msi = TRUE;
 297                 if ((err = pci_enable_msi(adapter->pdev))) {
 298                         DPRINTK(PROBE, ERR,
 299                          "Unable to allocate MSI interrupt Error: %d\n", err);
 300                         adapter->have_msi = FALSE;
 301                 }
 302         }
 303         if (adapter->have_msi) {
 304                 flags &= ~IRQF_SHARED;
 305                 err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
 306                                   netdev->name, netdev);
 307                 if (err)
 308                         DPRINTK(PROBE, ERR,
 309                                "Unable to allocate interrupt Error: %d\n", err);
 310         } else
 311 #endif
 312         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 313                                netdev->name, netdev)))
 314                 DPRINTK(PROBE, ERR,
 315                         "Unable to allocate interrupt Error: %d\n", err);
 316
 317         return err;
 318 }
 319
 320 static void e1000_free_irq(struct e1000_adapter *adapter)
 321 {
 322         struct net_device *netdev = adapter->netdev;
 323
 324         free_irq(adapter->pdev->irq, netdev);
 325
 326 #ifdef CONFIG_PCI_MSI
 327         if (adapter->have_msi)
 328                 pci_disable_msi(adapter->pdev);
 329 #endif
 330 }
 331
 332 /**
 333  * e1000_irq_disable - Mask off interrupt generation on the NIC
 334  * @adapter: board private structure
 335  **/
 336
 337 static void
 338 e1000_irq_disable(struct e1000_adapter *adapter)
 339 {
 340         atomic_inc(&adapter->irq_sem);
 341         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 342         E1000_WRITE_FLUSH(&adapter->hw);
 343         synchronize_irq(adapter->pdev->irq);
 344 }
 345
 346 /**
 347  * e1000_irq_enable - Enable default interrupt generation settings
 348  * @adapter: board private structure
 349  **/
 350
 351 static void
 352 e1000_irq_enable(struct e1000_adapter *adapter)
 353 {
 354         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 355                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 356                 E1000_WRITE_FLUSH(&adapter->hw);
 357         }
 358 }
 359
 360 static void
 361 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 362 {
 363         struct net_device *netdev = adapter->netdev;
 364         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 365         uint16_t old_vid = adapter->mng_vlan_id;
 366         if (adapter->vlgrp) {
 367                 if (!adapter->vlgrp->vlan_devices[vid]) {
 368                         if (adapter->hw.mng_cookie.status &
 369                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 370                                 e1000_vlan_rx_add_vid(netdev, vid);
 371                                 adapter->mng_vlan_id = vid;
 372                         } else
 373                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 374
 375                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 376                                         (vid != old_vid) &&
 377                                         !adapter->vlgrp->vlan_devices[old_vid])
 378                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 379                 } else
 380                         adapter->mng_vlan_id = vid;
 381         }
 382 }
 383
 384 /**
 385  * e1000_release_hw_control - release control of the h/w to f/w
 386  * @adapter: address of board private structure
 387  *
 388  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 389  * For ASF and Pass Through versions of f/w this means that the
 390  * driver is no longer loaded. For AMT version (only with 82573) i
 391  * of the f/w this means that the network i/f is closed.
 392  *
 393  **/
 394
 395 static void
 396 e1000_release_hw_control(struct e1000_adapter *adapter)
 397 {
 398         uint32_t ctrl_ext;
 399         uint32_t swsm;
 400         uint32_t extcnf;
 401
 402         /* Let firmware taken over control of h/w */
 403         switch (adapter->hw.mac_type) {
 404         case e1000_82571:
 405         case e1000_82572:
 406         case e1000_80003es2lan:
 407                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 408                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 409                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 410                 break;
 411         case e1000_82573:
 412                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 413                 E1000_WRITE_REG(&adapter->hw, SWSM,
 414                                 swsm & ~E1000_SWSM_DRV_LOAD);
 415         case e1000_ich8lan:
 416                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 417                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 418                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
 419                 break;
 420         default:
 421                 break;
 422         }
 423 }
 424
 425 /**
 426  * e1000_get_hw_control - get control of the h/w from f/w
 427  * @adapter: address of board private structure
 428  *
 429  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 430  * For ASF and Pass Through versions of f/w this means that
 431  * the driver is loaded. For AMT version (only with 82573)
 432  * of the f/w this means that the network i/f is open.
 433  *
 434  **/
 435
 436 static void
 437 e1000_get_hw_control(struct e1000_adapter *adapter)
 438 {
 439         uint32_t ctrl_ext;
 440         uint32_t swsm;
 441         uint32_t extcnf;
 442
 443         /* Let firmware know the driver has taken over */
 444         switch (adapter->hw.mac_type) {
 445         case e1000_82571:
 446         case e1000_82572:
 447         case e1000_80003es2lan:
 448                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 449                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 450                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 451                 break;
 452         case e1000_82573:
 453                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 454                 E1000_WRITE_REG(&adapter->hw, SWSM,
 455                                 swsm | E1000_SWSM_DRV_LOAD);
 456                 break;
 457         case e1000_ich8lan:
 458                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
 459                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
 460                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
 461                 break;
 462         default:
 463                 break;
 464         }
 465 }
 466
 467 static void
 468 e1000_init_manageability(struct e1000_adapter *adapter)
 469 {
 470         if (adapter->en_mng_pt) {
 471                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 472
 473                 /* disable hardware interception of ARP */
 474                 manc &= ~(E1000_MANC_ARP_EN);
 475
 476                 /* enable receiving management packets to the host */
 477                 /* this will probably generate destination unreachable messages
 478                  * from the host OS, but the packets will be handled on SMBUS */
 479                 if (adapter->hw.has_manc2h) {
 480                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
 481
 482                         manc |= E1000_MANC_EN_MNG2HOST;
 483 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 484 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 485                         manc2h |= E1000_MNG2HOST_PORT_623;
 486                         manc2h |= E1000_MNG2HOST_PORT_664;
 487                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
 488                 }
 489
 490                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 491         }
 492 }
 493
 494 static void
 495 e1000_release_manageability(struct e1000_adapter *adapter)
 496 {
 497         if (adapter->en_mng_pt) {
 498                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 499
 500                 /* re-enable hardware interception of ARP */
 501                 manc |= E1000_MANC_ARP_EN;
 502
 503                 if (adapter->hw.has_manc2h)
 504                         manc &= ~E1000_MANC_EN_MNG2HOST;
 505
 506                 /* don't explicitly have to mess with MANC2H since
 507                  * MANC has an enable disable that gates MANC2H */
 508
 509                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 510         }
 511 }
 512
 513 int
 514 e1000_up(struct e1000_adapter *adapter)
 515 {
 516         struct net_device *netdev = adapter->netdev;
 517         int i;
 518
 519         /* hardware has been reset, we need to reload some things */
 520
 521         e1000_set_multi(netdev);
 522
 523         e1000_restore_vlan(adapter);
 524         e1000_init_manageability(adapter);
 525
 526         e1000_configure_tx(adapter);
 527         e1000_setup_rctl(adapter);
 528         e1000_configure_rx(adapter);
 529         /* call E1000_DESC_UNUSED which always leaves
 530          * at least 1 descriptor unused to make sure
 531          * next_to_use != next_to_clean */
 532         for (i = 0; i < adapter->num_rx_queues; i++) {
 533                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 534                 adapter->alloc_rx_buf(adapter, ring,
 535                                       E1000_DESC_UNUSED(ring));
 536         }
 537
 538         adapter->tx_queue_len = netdev->tx_queue_len;
 539
 540 #ifdef CONFIG_E1000_NAPI
 541         netif_poll_enable(netdev);
 542 #endif
 543         e1000_irq_enable(adapter);
 544
 545         clear_bit(__E1000_DOWN, &adapter->flags);
 546
 547         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
 548         return 0;
 549 }
 550
 551 /**
 552  * e1000_power_up_phy - restore link in case the phy was powered down
 553  * @adapter: address of board private structure
 554  *
 555  * The phy may be powered down to save power and turn off link when the
 556  * driver is unloaded and wake on lan is not enabled (among others)
 557  * *** this routine MUST be followed by a call to e1000_reset ***
 558  *
 559  **/
 560
 561 void e1000_power_up_phy(struct e1000_adapter *adapter)
 562 {
 563         uint16_t mii_reg = 0;
 564
 565         /* Just clear the power down bit to wake the phy back up */
 566         if (adapter->hw.media_type == e1000_media_type_copper) {
 567                 /* according to the manual, the phy will retain its
 568                  * settings across a power-down/up cycle */
 569                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 570                 mii_reg &= ~MII_CR_POWER_DOWN;
 571                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 572         }
 573 }
 574
 575 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 576 {
 577         /* Power down the PHY so no link is implied when interface is down *
 578          * The PHY cannot be powered down if any of the following is TRUE *
 579          * (a) WoL is enabled
 580          * (b) AMT is active
 581          * (c) SoL/IDER session is active */
 582         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 583            adapter->hw.media_type == e1000_media_type_copper) {
 584                 uint16_t mii_reg = 0;
 585
 586                 switch (adapter->hw.mac_type) {
 587                 case e1000_82540:
 588                 case e1000_82545:
 589                 case e1000_82545_rev_3:
 590                 case e1000_82546:
 591                 case e1000_82546_rev_3:
 592                 case e1000_82541:
 593                 case e1000_82541_rev_2:
 594                 case e1000_82547:
 595                 case e1000_82547_rev_2:
 596                         if (E1000_READ_REG(&adapter->hw, MANC) &
 597                             E1000_MANC_SMBUS_EN)
 598                                 goto out;
 599                         break;
 600                 case e1000_82571:
 601                 case e1000_82572:
 602                 case e1000_82573:
 603                 case e1000_80003es2lan:
 604                 case e1000_ich8lan:
 605                         if (e1000_check_mng_mode(&adapter->hw) ||
 606                             e1000_check_phy_reset_block(&adapter->hw))
 607                                 goto out;
 608                         break;
 609                 default:
 610                         goto out;
 611                 }
 612                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 613                 mii_reg |= MII_CR_POWER_DOWN;
 614                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 615                 mdelay(1);
 616         }
 617 out:
 618         return;
 619 }
 620
 621 void
 622 e1000_down(struct e1000_adapter *adapter)
 623 {
 624         struct net_device *netdev = adapter->netdev;
 625
 626         /* signal that we're down so the interrupt handler does not
 627          * reschedule our watchdog timer */
 628         set_bit(__E1000_DOWN, &adapter->flags);
 629
 630         e1000_irq_disable(adapter);
 631
 632         del_timer_sync(&adapter->tx_fifo_stall_timer);
 633         del_timer_sync(&adapter->watchdog_timer);
 634         del_timer_sync(&adapter->phy_info_timer);
 635
 636 #ifdef CONFIG_E1000_NAPI
 637         netif_poll_disable(netdev);
 638 #endif
 639         netdev->tx_queue_len = adapter->tx_queue_len;
 640         adapter->link_speed = 0;
 641         adapter->link_duplex = 0;
 642         netif_carrier_off(netdev);
 643         netif_stop_queue(netdev);
 644
 645         e1000_reset(adapter);
 646         e1000_clean_all_tx_rings(adapter);
 647         e1000_clean_all_rx_rings(adapter);
 648 }
 649
 650 void
 651 e1000_reinit_locked(struct e1000_adapter *adapter)
 652 {
 653         WARN_ON(in_interrupt());
 654         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 655                 msleep(1);
 656         e1000_down(adapter);
 657         e1000_up(adapter);
 658         clear_bit(__E1000_RESETTING, &adapter->flags);
 659 }
 660
 661 void
 662 e1000_reset(struct e1000_adapter *adapter)
 663 {
 664         uint32_t pba;
 665         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 666
 667         /* Repartition Pba for greater than 9k mtu
 668          * To take effect CTRL.RST is required.
 669          */
 670
 671         switch (adapter->hw.mac_type) {
 672         case e1000_82547:
 673         case e1000_82547_rev_2:
 674                 pba = E1000_PBA_30K;
 675                 break;
 676         case e1000_82571:
 677         case e1000_82572:
 678         case e1000_80003es2lan:
 679                 pba = E1000_PBA_38K;
 680                 break;
 681         case e1000_82573:
 682                 pba = E1000_PBA_12K;
 683                 break;
 684         case e1000_ich8lan:
 685                 pba = E1000_PBA_8K;
 686                 break;
 687         default:
 688                 pba = E1000_PBA_48K;
 689                 break;
 690         }
 691
 692         if ((adapter->hw.mac_type != e1000_82573) &&
 693            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 694                 pba -= 8; /* allocate more FIFO for Tx */
 695
 696
 697         if (adapter->hw.mac_type == e1000_82547) {
 698                 adapter->tx_fifo_head = 0;
 699                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 700                 adapter->tx_fifo_size =
 701                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 702                 atomic_set(&adapter->tx_fifo_stall, 0);
 703         }
 704
 705         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 706
 707         /* flow control settings */
 708         /* Set the FC high water mark to 90% of the FIFO size.
 709          * Required to clear last 3 LSB */
 710         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 711         /* We can't use 90% on small FIFOs because the remainder
 712          * would be less than 1 full frame.  In this case, we size
 713          * it to allow at least a full frame above the high water
 714          *  mark. */
 715         if (pba < E1000_PBA_16K)
 716                 fc_high_water_mark = (pba * 1024) - 1600;
 717
 718         adapter->hw.fc_high_water = fc_high_water_mark;
 719         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 720         if (adapter->hw.mac_type == e1000_80003es2lan)
 721                 adapter->hw.fc_pause_time = 0xFFFF;
 722         else
 723                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 724         adapter->hw.fc_send_xon = 1;
 725         adapter->hw.fc = adapter->hw.original_fc;
 726
 727         /* Allow time for pending master requests to run */
 728         e1000_reset_hw(&adapter->hw);
 729         if (adapter->hw.mac_type >= e1000_82544)
 730                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 731
 732         if (e1000_init_hw(&adapter->hw))
 733                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 734         e1000_update_mng_vlan(adapter);
 735
 736         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 737         if (adapter->hw.mac_type >= e1000_82544 &&
 738             adapter->hw.mac_type <= e1000_82547_rev_2 &&
 739             adapter->hw.autoneg == 1 &&
 740             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
 741                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
 742                 /* clear phy power management bit if we are in gig only mode,
 743                  * which if enabled will attempt negotiation to 100Mb, which
 744                  * can cause a loss of link at power off or driver unload */
 745                 ctrl &= ~E1000_CTRL_SWDPIN3;
 746                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
 747         }
 748
 749         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 750         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 751
 752         e1000_reset_adaptive(&adapter->hw);
 753         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 754
 755         if (!adapter->smart_power_down &&
 756             (adapter->hw.mac_type == e1000_82571 ||
 757              adapter->hw.mac_type == e1000_82572)) {
 758                 uint16_t phy_data = 0;
 759                 /* speed up time to link by disabling smart power down, ignore
 760                  * the return value of this function because there is nothing
 761                  * different we would do if it failed */
 762                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 763                                    &phy_data);
 764                 phy_data &= ~IGP02E1000_PM_SPD;
 765                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 766                                     phy_data);
 767         }
 768
 769         e1000_release_manageability(adapter);
 770 }
 771
 772 /**
 773  * e1000_probe - Device Initialization Routine
 774  * @pdev: PCI device information struct
 775  * @ent: entry in e1000_pci_tbl
 776  *
 777  * Returns 0 on success, negative on failure
 778  *
 779  * e1000_probe initializes an adapter identified by a pci_dev structure.
 780  * The OS initialization, configuring of the adapter private structure,
 781  * and a hardware reset occur.
 782  **/
 783
 784 static int __devinit
 785 e1000_probe(struct pci_dev *pdev,
 786             const struct pci_device_id *ent)
 787 {
 788         struct net_device *netdev;
 789         struct e1000_adapter *adapter;
 790         unsigned long mmio_start, mmio_len;
 791         unsigned long flash_start, flash_len;
 792
 793         static int cards_found = 0;
 794         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 795         int i, err, pci_using_dac;
 796         uint16_t eeprom_data = 0;
 797         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 798         if ((err = pci_enable_device(pdev)))
 799                 return err;
 800
 801         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 802             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 803                 pci_using_dac = 1;
 804         } else {
 805                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 806                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 807                         E1000_ERR("No usable DMA configuration, aborting\n");
 808                         goto err_dma;
 809                 }
 810                 pci_using_dac = 0;
 811         }
 812
 813         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 814                 goto err_pci_reg;
 815
 816         pci_set_master(pdev);
 817
 818         err = -ENOMEM;
 819         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 820         if (!netdev)
 821                 goto err_alloc_etherdev;
 822
 823         SET_MODULE_OWNER(netdev);
 824         SET_NETDEV_DEV(netdev, &pdev->dev);
 825
 826         pci_set_drvdata(pdev, netdev);
 827         adapter = netdev_priv(netdev);
 828         adapter->netdev = netdev;
 829         adapter->pdev = pdev;
 830         adapter->hw.back = adapter;
 831         adapter->msg_enable = (1 << debug) - 1;
 832
 833         mmio_start = pci_resource_start(pdev, BAR_0);
 834         mmio_len = pci_resource_len(pdev, BAR_0);
 835
 836         err = -EIO;
 837         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 838         if (!adapter->hw.hw_addr)
 839                 goto err_ioremap;
 840
 841         for (i = BAR_1; i <= BAR_5; i++) {
 842                 if (pci_resource_len(pdev, i) == 0)
 843                         continue;
 844                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 845                         adapter->hw.io_base = pci_resource_start(pdev, i);
 846                         break;
 847                 }
 848         }
 849
 850         netdev->open = &e1000_open;
 851         netdev->stop = &e1000_close;
 852         netdev->hard_start_xmit = &e1000_xmit_frame;
 853         netdev->get_stats = &e1000_get_stats;
 854         netdev->set_multicast_list = &e1000_set_multi;
 855         netdev->set_mac_address = &e1000_set_mac;
 856         netdev->change_mtu = &e1000_change_mtu;
 857         netdev->do_ioctl = &e1000_ioctl;
 858         e1000_set_ethtool_ops(netdev);
 859         netdev->tx_timeout = &e1000_tx_timeout;
 860         netdev->watchdog_timeo = 5 * HZ;
 861 #ifdef CONFIG_E1000_NAPI
 862         netdev->poll = &e1000_clean;
 863         netdev->weight = 64;
 864 #endif
 865         netdev->vlan_rx_register = e1000_vlan_rx_register;
 866         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 867         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 868 #ifdef CONFIG_NET_POLL_CONTROLLER
 869         netdev->poll_controller = e1000_netpoll;
 870 #endif
 871         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 872
 873         netdev->mem_start = mmio_start;
 874         netdev->mem_end = mmio_start + mmio_len;
 875         netdev->base_addr = adapter->hw.io_base;
 876
 877         adapter->bd_number = cards_found;
 878
 879         /* setup the private structure */
 880
 881         if ((err = e1000_sw_init(adapter)))
 882                 goto err_sw_init;
 883
 884         err = -EIO;
 885         /* Flash BAR mapping must happen after e1000_sw_init
 886          * because it depends on mac_type */
 887         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 888            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 889                 flash_start = pci_resource_start(pdev, 1);
 890                 flash_len = pci_resource_len(pdev, 1);
 891                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 892                 if (!adapter->hw.flash_address)
 893                         goto err_flashmap;
 894         }
 895
 896         if (e1000_check_phy_reset_block(&adapter->hw))
 897                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 898
 899         if (adapter->hw.mac_type >= e1000_82543) {
 900                 netdev->features = NETIF_F_SG |
 901                                    NETIF_F_HW_CSUM |
 902                                    NETIF_F_HW_VLAN_TX |
 903                                    NETIF_F_HW_VLAN_RX |
 904                                    NETIF_F_HW_VLAN_FILTER;
 905                 if (adapter->hw.mac_type == e1000_ich8lan)
 906                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
 907         }
 908
 909 #ifdef NETIF_F_TSO
 910         if ((adapter->hw.mac_type >= e1000_82544) &&
 911            (adapter->hw.mac_type != e1000_82547))
 912                 netdev->features |= NETIF_F_TSO;
 913
 914 #ifdef CONFIG_DEBUG_SLAB
 915         /* 82544's work arounds do not play nicely with DEBUG SLAB */
 916         if (adapter->hw.mac_type == e1000_82544)
 917                 netdev->features &= ~NETIF_F_TSO;
 918 #endif
 919
 920 #ifdef NETIF_F_TSO6
 921         if (adapter->hw.mac_type > e1000_82547_rev_2)
 922                 netdev->features |= NETIF_F_TSO6;
 923 #endif
 924 #endif
 925         if (pci_using_dac)
 926                 netdev->features |= NETIF_F_HIGHDMA;
 927
 928         netdev->features |= NETIF_F_LLTX;
 929
 930         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 931
 932         /* initialize eeprom parameters */
 933
 934         if (e1000_init_eeprom_params(&adapter->hw)) {
 935                 E1000_ERR("EEPROM initialization failed\n");
 936                 goto err_eeprom;
 937         }
 938
 939         /* before reading the EEPROM, reset the controller to
 940          * put the device in a known good starting state */
 941
 942         e1000_reset_hw(&adapter->hw);
 943
 944         /* make sure the EEPROM is good */
 945
 946         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 947                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 948                 goto err_eeprom;
 949         }
 950
 951         /* copy the MAC address out of the EEPROM */
 952
 953         if (e1000_read_mac_addr(&adapter->hw))
 954                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 955         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 956         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 957
 958         if (!is_valid_ether_addr(netdev->perm_addr)) {
 959                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 960                 goto err_eeprom;
 961         }
 962
 963         e1000_get_bus_info(&adapter->hw);
 964
 965         init_timer(&adapter->tx_fifo_stall_timer);
 966         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 967         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 968
 969         init_timer(&adapter->watchdog_timer);
 970         adapter->watchdog_timer.function = &e1000_watchdog;
 971         adapter->watchdog_timer.data = (unsigned long) adapter;
 972
 973         init_timer(&adapter->phy_info_timer);
 974         adapter->phy_info_timer.function = &e1000_update_phy_info;
 975         adapter->phy_info_timer.data = (unsigned long) adapter;
 976
 977         INIT_WORK(&adapter->reset_task, e1000_reset_task);
 978
 979         e1000_check_options(adapter);
 980
 981         /* Initial Wake on LAN setting
 982          * If APM wake is enabled in the EEPROM,
 983          * enable the ACPI Magic Packet filter
 984          */
 985
 986         switch (adapter->hw.mac_type) {
 987         case e1000_82542_rev2_0:
 988         case e1000_82542_rev2_1:
 989         case e1000_82543:
 990                 break;
 991         case e1000_82544:
 992                 e1000_read_eeprom(&adapter->hw,
 993                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 994                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 995                 break;
 996         case e1000_ich8lan:
 997                 e1000_read_eeprom(&adapter->hw,
 998                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
 999                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1000                 break;
1001         case e1000_82546:
1002         case e1000_82546_rev_3:
1003         case e1000_82571:
1004         case e1000_80003es2lan:
1005                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1006                         e1000_read_eeprom(&adapter->hw,
1007                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1008                         break;
1009                 }
1010                 /* Fall Through */
1011         default:
1012                 e1000_read_eeprom(&adapter->hw,
1013                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1014                 break;
1015         }
1016         if (eeprom_data & eeprom_apme_mask)
1017                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1018
1019         /* now that we have the eeprom settings, apply the special cases
1020          * where the eeprom may be wrong or the board simply won't support
1021          * wake on lan on a particular port */
1022         switch (pdev->device) {
1023         case E1000_DEV_ID_82546GB_PCIE:
1024                 adapter->eeprom_wol = 0;
1025                 break;
1026         case E1000_DEV_ID_82546EB_FIBER:
1027         case E1000_DEV_ID_82546GB_FIBER:
1028         case E1000_DEV_ID_82571EB_FIBER:
1029                 /* Wake events only supported on port A for dual fiber
1030                  * regardless of eeprom setting */
1031                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1032                         adapter->eeprom_wol = 0;
1033                 break;
1034         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1035         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1036         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1037                 /* if quad port adapter, disable WoL on all but port A */
1038                 if (global_quad_port_a != 0)
1039                         adapter->eeprom_wol = 0;
1040                 else
1041                         adapter->quad_port_a = 1;
1042                 /* Reset for multiple quad port adapters */
1043                 if (++global_quad_port_a == 4)
1044                         global_quad_port_a = 0;
1045                 break;
1046         }
1047
1048         /* initialize the wol settings based on the eeprom settings */
1049         adapter->wol = adapter->eeprom_wol;
1050
1051         /* print bus type/speed/width info */
1052         {
1053         struct e1000_hw *hw = &adapter->hw;
1054         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1055                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1056                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1057                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1058                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1059                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1060                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1061                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1062                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1063                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1064                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1065                  "32-bit"));
1066         }
1067
1068         for (i = 0; i < 6; i++)
1069                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1070
1071         /* reset the hardware with the new settings */
1072         e1000_reset(adapter);
1073
1074         /* If the controller is 82573 and f/w is AMT, do not set
1075          * DRV_LOAD until the interface is up.  For all other cases,
1076          * let the f/w know that the h/w is now under the control
1077          * of the driver. */
1078         if (adapter->hw.mac_type != e1000_82573 ||
1079             !e1000_check_mng_mode(&adapter->hw))
1080                 e1000_get_hw_control(adapter);
1081
1082         strcpy(netdev->name, "eth%d");
1083         if ((err = register_netdev(netdev)))
1084                 goto err_register;
1085
1086         /* tell the stack to leave us alone until e1000_open() is called */
1087         netif_carrier_off(netdev);
1088         netif_stop_queue(netdev);
1089
1090         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1091
1092         cards_found++;
1093         return 0;
1094
1095 err_register:
1096         e1000_release_hw_control(adapter);
1097 err_eeprom:
1098         if (!e1000_check_phy_reset_block(&adapter->hw))
1099                 e1000_phy_hw_reset(&adapter->hw);
1100
1101         if (adapter->hw.flash_address)
1102                 iounmap(adapter->hw.flash_address);
1103 err_flashmap:
1104 #ifdef CONFIG_E1000_NAPI
1105         for (i = 0; i < adapter->num_rx_queues; i++)
1106                 dev_put(&adapter->polling_netdev[i]);
1107 #endif
1108
1109         kfree(adapter->tx_ring);
1110         kfree(adapter->rx_ring);
1111 #ifdef CONFIG_E1000_NAPI
1112         kfree(adapter->polling_netdev);
1113 #endif
1114 err_sw_init:
1115         iounmap(adapter->hw.hw_addr);
1116 err_ioremap:
1117         free_netdev(netdev);
1118 err_alloc_etherdev:
1119         pci_release_regions(pdev);
1120 err_pci_reg:
1121 err_dma:
1122         pci_disable_device(pdev);
1123         return err;
1124 }
1125
1126 /**
1127  * e1000_remove - Device Removal Routine
1128  * @pdev: PCI device information struct
1129  *
1130  * e1000_remove is called by the PCI subsystem to alert the driver
1131  * that it should release a PCI device.  The could be caused by a
1132  * Hot-Plug event, or because the driver is going to be removed from
1133  * memory.
1134  **/
1135
1136 static void __devexit
1137 e1000_remove(struct pci_dev *pdev)
1138 {
1139         struct net_device *netdev = pci_get_drvdata(pdev);
1140         struct e1000_adapter *adapter = netdev_priv(netdev);
1141 #ifdef CONFIG_E1000_NAPI
1142         int i;
1143 #endif
1144
1145         flush_scheduled_work();
1146
1147         e1000_release_manageability(adapter);
1148
1149         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1150          * would have already happened in close and is redundant. */
1151         e1000_release_hw_control(adapter);
1152
1153         unregister_netdev(netdev);
1154 #ifdef CONFIG_E1000_NAPI
1155         for (i = 0; i < adapter->num_rx_queues; i++)
1156                 dev_put(&adapter->polling_netdev[i]);
1157 #endif
1158
1159         if (!e1000_check_phy_reset_block(&adapter->hw))
1160                 e1000_phy_hw_reset(&adapter->hw);
1161
1162         kfree(adapter->tx_ring);
1163         kfree(adapter->rx_ring);
1164 #ifdef CONFIG_E1000_NAPI
1165         kfree(adapter->polling_netdev);
1166 #endif
1167
1168         iounmap(adapter->hw.hw_addr);
1169         if (adapter->hw.flash_address)
1170                 iounmap(adapter->hw.flash_address);
1171         pci_release_regions(pdev);
1172
1173         free_netdev(netdev);
1174
1175         pci_disable_device(pdev);
1176 }
1177
1178 /**
1179  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1180  * @adapter: board private structure to initialize
1181  *
1182  * e1000_sw_init initializes the Adapter private data structure.
1183  * Fields are initialized based on PCI device information and
1184  * OS network device settings (MTU size).
1185  **/
1186
1187 static int __devinit
1188 e1000_sw_init(struct e1000_adapter *adapter)
1189 {
1190         struct e1000_hw *hw = &adapter->hw;
1191         struct net_device *netdev = adapter->netdev;
1192         struct pci_dev *pdev = adapter->pdev;
1193 #ifdef CONFIG_E1000_NAPI
1194         int i;
1195 #endif
1196
1197         /* PCI config space info */
1198
1199         hw->vendor_id = pdev->vendor;
1200         hw->device_id = pdev->device;
1201         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1202         hw->subsystem_id = pdev->subsystem_device;
1203
1204         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1205
1206         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1207
1208         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1209         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1210         hw->max_frame_size = netdev->mtu +
1211                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1212         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1213
1214         /* identify the MAC */
1215
1216         if (e1000_set_mac_type(hw)) {
1217                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1218                 return -EIO;
1219         }
1220
1221         switch (hw->mac_type) {
1222         default:
1223                 break;
1224         case e1000_82541:
1225         case e1000_82547:
1226         case e1000_82541_rev_2:
1227         case e1000_82547_rev_2:
1228                 hw->phy_init_script = 1;
1229                 break;
1230         }
1231
1232         e1000_set_media_type(hw);
1233
1234         hw->wait_autoneg_complete = FALSE;
1235         hw->tbi_compatibility_en = TRUE;
1236         hw->adaptive_ifs = TRUE;
1237
1238         /* Copper options */
1239
1240         if (hw->media_type == e1000_media_type_copper) {
1241                 hw->mdix = AUTO_ALL_MODES;
1242                 hw->disable_polarity_correction = FALSE;
1243                 hw->master_slave = E1000_MASTER_SLAVE;
1244         }
1245
1246         adapter->num_tx_queues = 1;
1247         adapter->num_rx_queues = 1;
1248
1249         if (e1000_alloc_queues(adapter)) {
1250                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1251                 return -ENOMEM;
1252         }
1253
1254 #ifdef CONFIG_E1000_NAPI
1255         for (i = 0; i < adapter->num_rx_queues; i++) {
1256                 adapter->polling_netdev[i].priv = adapter;
1257                 adapter->polling_netdev[i].poll = &e1000_clean;
1258                 adapter->polling_netdev[i].weight = 64;
1259                 dev_hold(&adapter->polling_netdev[i]);
1260                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1261         }
1262         spin_lock_init(&adapter->tx_queue_lock);
1263 #endif
1264
1265         atomic_set(&adapter->irq_sem, 1);
1266         spin_lock_init(&adapter->stats_lock);
1267
1268         set_bit(__E1000_DOWN, &adapter->flags);
1269
1270         return 0;
1271 }
1272
1273 /**
1274  * e1000_alloc_queues - Allocate memory for all rings
1275  * @adapter: board private structure to initialize
1276  *
1277  * We allocate one ring per queue at run-time since we don't know the
1278  * number of queues at compile-time.  The polling_netdev array is
1279  * intended for Multiqueue, but should work fine with a single queue.
1280  **/
1281
1282 static int __devinit
1283 e1000_alloc_queues(struct e1000_adapter *adapter)
1284 {
1285         int size;
1286
1287         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1288         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1289         if (!adapter->tx_ring)
1290                 return -ENOMEM;
1291         memset(adapter->tx_ring, 0, size);
1292
1293         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1294         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1295         if (!adapter->rx_ring) {
1296                 kfree(adapter->tx_ring);
1297                 return -ENOMEM;
1298         }
1299         memset(adapter->rx_ring, 0, size);
1300
1301 #ifdef CONFIG_E1000_NAPI
1302         size = sizeof(struct net_device) * adapter->num_rx_queues;
1303         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1304         if (!adapter->polling_netdev) {
1305                 kfree(adapter->tx_ring);
1306                 kfree(adapter->rx_ring);
1307                 return -ENOMEM;
1308         }
1309         memset(adapter->polling_netdev, 0, size);
1310 #endif
1311
1312         return E1000_SUCCESS;
1313 }
1314
1315 /**
1316  * e1000_open - Called when a network interface is made active
1317  * @netdev: network interface device structure
1318  *
1319  * Returns 0 on success, negative value on failure
1320  *
1321  * The open entry point is called when a network interface is made
1322  * active by the system (IFF_UP).  At this point all resources needed
1323  * for transmit and receive operations are allocated, the interrupt
1324  * handler is registered with the OS, the watchdog timer is started,
1325  * and the stack is notified that the interface is ready.
1326  **/
1327
1328 static int
1329 e1000_open(struct net_device *netdev)
1330 {
1331         struct e1000_adapter *adapter = netdev_priv(netdev);
1332         int err;
1333
1334         /* disallow open during test */
1335         if (test_bit(__E1000_TESTING, &adapter->flags))
1336                 return -EBUSY;
1337
1338         /* allocate transmit descriptors */
1339         if ((err = e1000_setup_all_tx_resources(adapter)))
1340                 goto err_setup_tx;
1341
1342         /* allocate receive descriptors */
1343         if ((err = e1000_setup_all_rx_resources(adapter)))
1344                 goto err_setup_rx;
1345
1346         err = e1000_request_irq(adapter);
1347         if (err)
1348                 goto err_req_irq;
1349
1350         e1000_power_up_phy(adapter);
1351
1352         if ((err = e1000_up(adapter)))
1353                 goto err_up;
1354         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1355         if ((adapter->hw.mng_cookie.status &
1356                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1357                 e1000_update_mng_vlan(adapter);
1358         }
1359
1360         /* If AMT is enabled, let the firmware know that the network
1361          * interface is now open */
1362         if (adapter->hw.mac_type == e1000_82573 &&
1363             e1000_check_mng_mode(&adapter->hw))
1364                 e1000_get_hw_control(adapter);
1365
1366         return E1000_SUCCESS;
1367
1368 err_up:
1369         e1000_power_down_phy(adapter);
1370         e1000_free_irq(adapter);
1371 err_req_irq:
1372         e1000_free_all_rx_resources(adapter);
1373 err_setup_rx:
1374         e1000_free_all_tx_resources(adapter);
1375 err_setup_tx:
1376         e1000_reset(adapter);
1377
1378         return err;
1379 }
1380
1381 /**
1382  * e1000_close - Disables a network interface
1383  * @netdev: network interface device structure
1384  *
1385  * Returns 0, this is not allowed to fail
1386  *
1387  * The close entry point is called when an interface is de-activated
1388  * by the OS.  The hardware is still under the drivers control, but
1389  * needs to be disabled.  A global MAC reset is issued to stop the
1390  * hardware, and all transmit and receive resources are freed.
1391  **/
1392
1393 static int
1394 e1000_close(struct net_device *netdev)
1395 {
1396         struct e1000_adapter *adapter = netdev_priv(netdev);
1397
1398         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1399         e1000_down(adapter);
1400         e1000_power_down_phy(adapter);
1401         e1000_free_irq(adapter);
1402
1403         e1000_free_all_tx_resources(adapter);
1404         e1000_free_all_rx_resources(adapter);
1405
1406         /* kill manageability vlan ID if supported, but not if a vlan with
1407          * the same ID is registered on the host OS (let 8021q kill it) */
1408         if ((adapter->hw.mng_cookie.status &
1409                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1410              !(adapter->vlgrp &&
1411                           adapter->vlgrp->vlan_devices[adapter->mng_vlan_id])) {
1412                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1413         }
1414
1415         /* If AMT is enabled, let the firmware know that the network
1416          * interface is now closed */
1417         if (adapter->hw.mac_type == e1000_82573 &&
1418             e1000_check_mng_mode(&adapter->hw))
1419                 e1000_release_hw_control(adapter);
1420
1421         return 0;
1422 }
1423
1424 /**
1425  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1426  * @adapter: address of board private structure
1427  * @start: address of beginning of memory
1428  * @len: length of memory
1429  **/
1430 static boolean_t
1431 e1000_check_64k_bound(struct e1000_adapter *adapter,
1432                       void *start, unsigned long len)
1433 {
1434         unsigned long begin = (unsigned long) start;
1435         unsigned long end = begin + len;
1436
1437         /* First rev 82545 and 82546 need to not allow any memory
1438          * write location to cross 64k boundary due to errata 23 */
1439         if (adapter->hw.mac_type == e1000_82545 ||
1440             adapter->hw.mac_type == e1000_82546) {
1441                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1442         }
1443
1444         return TRUE;
1445 }
1446
1447 /**
1448  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1449  * @adapter: board private structure
1450  * @txdr:    tx descriptor ring (for a specific queue) to setup
1451  *
1452  * Return 0 on success, negative on failure
1453  **/
1454
1455 static int
1456 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1457                          struct e1000_tx_ring *txdr)
1458 {
1459         struct pci_dev *pdev = adapter->pdev;
1460         int size;
1461
1462         size = sizeof(struct e1000_buffer) * txdr->count;
1463         txdr->buffer_info = vmalloc(size);
1464         if (!txdr->buffer_info) {
1465                 DPRINTK(PROBE, ERR,
1466                 "Unable to allocate memory for the transmit descriptor ring\n");
1467                 return -ENOMEM;
1468         }
1469         memset(txdr->buffer_info, 0, size);
1470
1471         /* round up to nearest 4K */
1472
1473         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1474         E1000_ROUNDUP(txdr->size, 4096);
1475
1476         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1477         if (!txdr->desc) {
1478 setup_tx_desc_die:
1479                 vfree(txdr->buffer_info);
1480                 DPRINTK(PROBE, ERR,
1481                 "Unable to allocate memory for the transmit descriptor ring\n");
1482                 return -ENOMEM;
1483         }
1484
1485         /* Fix for errata 23, can't cross 64kB boundary */
1486         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1487                 void *olddesc = txdr->desc;
1488                 dma_addr_t olddma = txdr->dma;
1489                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1490                                      "at %p\n", txdr->size, txdr->desc);
1491                 /* Try again, without freeing the previous */
1492                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1493                 /* Failed allocation, critical failure */
1494                 if (!txdr->desc) {
1495                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1496                         goto setup_tx_desc_die;
1497                 }
1498
1499                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1500                         /* give up */
1501                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1502                                             txdr->dma);
1503                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1504                         DPRINTK(PROBE, ERR,
1505                                 "Unable to allocate aligned memory "
1506                                 "for the transmit descriptor ring\n");
1507                         vfree(txdr->buffer_info);
1508                         return -ENOMEM;
1509                 } else {
1510                         /* Free old allocation, new allocation was successful */
1511                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1512                 }
1513         }
1514         memset(txdr->desc, 0, txdr->size);
1515
1516         txdr->next_to_use = 0;
1517         txdr->next_to_clean = 0;
1518         spin_lock_init(&txdr->tx_lock);
1519
1520         return 0;
1521 }
1522
1523 /**
1524  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1525  *                                (Descriptors) for all queues
1526  * @adapter: board private structure
1527  *
1528  * Return 0 on success, negative on failure
1529  **/
1530
1531 int
1532 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1533 {
1534         int i, err = 0;
1535
1536         for (i = 0; i < adapter->num_tx_queues; i++) {
1537                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1538                 if (err) {
1539                         DPRINTK(PROBE, ERR,
1540                                 "Allocation for Tx Queue %u failed\n", i);
1541                         for (i-- ; i >= 0; i--)
1542                                 e1000_free_tx_resources(adapter,
1543                                                         &adapter->tx_ring[i]);
1544                         break;
1545                 }
1546         }
1547
1548         return err;
1549 }
1550
1551 /**
1552  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1553  * @adapter: board private structure
1554  *
1555  * Configure the Tx unit of the MAC after a reset.
1556  **/
1557
1558 static void
1559 e1000_configure_tx(struct e1000_adapter *adapter)
1560 {
1561         uint64_t tdba;
1562         struct e1000_hw *hw = &adapter->hw;
1563         uint32_t tdlen, tctl, tipg, tarc;
1564         uint32_t ipgr1, ipgr2;
1565
1566         /* Setup the HW Tx Head and Tail descriptor pointers */
1567
1568         switch (adapter->num_tx_queues) {
1569         case 1:
1570         default:
1571                 tdba = adapter->tx_ring[0].dma;
1572                 tdlen = adapter->tx_ring[0].count *
1573                         sizeof(struct e1000_tx_desc);
1574                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1575                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1576                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1577                 E1000_WRITE_REG(hw, TDT, 0);
1578                 E1000_WRITE_REG(hw, TDH, 0);
1579                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1580                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1581                 break;
1582         }
1583
1584         /* Set the default values for the Tx Inter Packet Gap timer */
1585
1586         if (hw->media_type == e1000_media_type_fiber ||
1587             hw->media_type == e1000_media_type_internal_serdes)
1588                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1589         else
1590                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1591
1592         switch (hw->mac_type) {
1593         case e1000_82542_rev2_0:
1594         case e1000_82542_rev2_1:
1595                 tipg = DEFAULT_82542_TIPG_IPGT;
1596                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1597                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1598                 break;
1599         case e1000_80003es2lan:
1600                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1601                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1602                 break;
1603         default:
1604                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1605                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1606                 break;
1607         }
1608         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1609         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1610         E1000_WRITE_REG(hw, TIPG, tipg);
1611
1612         /* Set the Tx Interrupt Delay register */
1613
1614         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1615         if (hw->mac_type >= e1000_82540)
1616                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1617
1618         /* Program the Transmit Control Register */
1619
1620         tctl = E1000_READ_REG(hw, TCTL);
1621         tctl &= ~E1000_TCTL_CT;
1622         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1623                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1624
1625         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1626                 tarc = E1000_READ_REG(hw, TARC0);
1627                 /* set the speed mode bit, we'll clear it if we're not at
1628                  * gigabit link later */
1629                 tarc |= (1 << 21);
1630                 E1000_WRITE_REG(hw, TARC0, tarc);
1631         } else if (hw->mac_type == e1000_80003es2lan) {
1632                 tarc = E1000_READ_REG(hw, TARC0);
1633                 tarc |= 1;
1634                 E1000_WRITE_REG(hw, TARC0, tarc);
1635                 tarc = E1000_READ_REG(hw, TARC1);
1636                 tarc |= 1;
1637                 E1000_WRITE_REG(hw, TARC1, tarc);
1638         }
1639
1640         e1000_config_collision_dist(hw);
1641
1642         /* Setup Transmit Descriptor Settings for eop descriptor */
1643         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1644
1645         /* only set IDE if we are delaying interrupts using the timers */
1646         if (adapter->tx_int_delay)
1647                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1648
1649         if (hw->mac_type < e1000_82543)
1650                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1651         else
1652                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1653
1654         /* Cache if we're 82544 running in PCI-X because we'll
1655          * need this to apply a workaround later in the send path. */
1656         if (hw->mac_type == e1000_82544 &&
1657             hw->bus_type == e1000_bus_type_pcix)
1658                 adapter->pcix_82544 = 1;
1659
1660         E1000_WRITE_REG(hw, TCTL, tctl);
1661
1662 }
1663
1664 /**
1665  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1666  * @adapter: board private structure
1667  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1668  *
1669  * Returns 0 on success, negative on failure
1670  **/
1671
1672 static int
1673 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1674                          struct e1000_rx_ring *rxdr)
1675 {
1676         struct pci_dev *pdev = adapter->pdev;
1677         int size, desc_len;
1678
1679         size = sizeof(struct e1000_buffer) * rxdr->count;
1680         rxdr->buffer_info = vmalloc(size);
1681         if (!rxdr->buffer_info) {
1682                 DPRINTK(PROBE, ERR,
1683                 "Unable to allocate memory for the receive descriptor ring\n");
1684                 return -ENOMEM;
1685         }
1686         memset(rxdr->buffer_info, 0, size);
1687
1688         size = sizeof(struct e1000_ps_page) * rxdr->count;
1689         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1690         if (!rxdr->ps_page) {
1691                 vfree(rxdr->buffer_info);
1692                 DPRINTK(PROBE, ERR,
1693                 "Unable to allocate memory for the receive descriptor ring\n");
1694                 return -ENOMEM;
1695         }
1696         memset(rxdr->ps_page, 0, size);
1697
1698         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1699         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1700         if (!rxdr->ps_page_dma) {
1701                 vfree(rxdr->buffer_info);
1702                 kfree(rxdr->ps_page);
1703                 DPRINTK(PROBE, ERR,
1704                 "Unable to allocate memory for the receive descriptor ring\n");
1705                 return -ENOMEM;
1706         }
1707         memset(rxdr->ps_page_dma, 0, size);
1708
1709         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1710                 desc_len = sizeof(struct e1000_rx_desc);
1711         else
1712                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1713
1714         /* Round up to nearest 4K */
1715
1716         rxdr->size = rxdr->count * desc_len;
1717         E1000_ROUNDUP(rxdr->size, 4096);
1718
1719         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1720
1721         if (!rxdr->desc) {
1722                 DPRINTK(PROBE, ERR,
1723                 "Unable to allocate memory for the receive descriptor ring\n");
1724 setup_rx_desc_die:
1725                 vfree(rxdr->buffer_info);
1726                 kfree(rxdr->ps_page);
1727                 kfree(rxdr->ps_page_dma);
1728                 return -ENOMEM;
1729         }
1730
1731         /* Fix for errata 23, can't cross 64kB boundary */
1732         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1733                 void *olddesc = rxdr->desc;
1734                 dma_addr_t olddma = rxdr->dma;
1735                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1736                                      "at %p\n", rxdr->size, rxdr->desc);
1737                 /* Try again, without freeing the previous */
1738                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1739                 /* Failed allocation, critical failure */
1740                 if (!rxdr->desc) {
1741                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1742                         DPRINTK(PROBE, ERR,
1743                                 "Unable to allocate memory "
1744                                 "for the receive descriptor ring\n");
1745                         goto setup_rx_desc_die;
1746                 }
1747
1748                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1749                         /* give up */
1750                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1751                                             rxdr->dma);
1752                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1753                         DPRINTK(PROBE, ERR,
1754                                 "Unable to allocate aligned memory "
1755                                 "for the receive descriptor ring\n");
1756                         goto setup_rx_desc_die;
1757                 } else {
1758                         /* Free old allocation, new allocation was successful */
1759                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1760                 }
1761         }
1762         memset(rxdr->desc, 0, rxdr->size);
1763
1764         rxdr->next_to_clean = 0;
1765         rxdr->next_to_use = 0;
1766
1767         return 0;
1768 }
1769
1770 /**
1771  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1772  *                                (Descriptors) for all queues
1773  * @adapter: board private structure
1774  *
1775  * Return 0 on success, negative on failure
1776  **/
1777
1778 int
1779 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1780 {
1781         int i, err = 0;
1782
1783         for (i = 0; i < adapter->num_rx_queues; i++) {
1784                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1785                 if (err) {
1786                         DPRINTK(PROBE, ERR,
1787                                 "Allocation for Rx Queue %u failed\n", i);
1788                         for (i-- ; i >= 0; i--)
1789                                 e1000_free_rx_resources(adapter,
1790                                                         &adapter->rx_ring[i]);
1791                         break;
1792                 }
1793         }
1794
1795         return err;
1796 }
1797
1798 /**
1799  * e1000_setup_rctl - configure the receive control registers
1800  * @adapter: Board private structure
1801  **/
1802 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1803                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1804 static void
1805 e1000_setup_rctl(struct e1000_adapter *adapter)
1806 {
1807         uint32_t rctl, rfctl;
1808         uint32_t psrctl = 0;
1809 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1810         uint32_t pages = 0;
1811 #endif
1812
1813         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1814
1815         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1816
1817         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1818                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1819                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1820
1821         if (adapter->hw.tbi_compatibility_on == 1)
1822                 rctl |= E1000_RCTL_SBP;
1823         else
1824                 rctl &= ~E1000_RCTL_SBP;
1825
1826         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1827                 rctl &= ~E1000_RCTL_LPE;
1828         else
1829                 rctl |= E1000_RCTL_LPE;
1830
1831         /* Setup buffer sizes */
1832         rctl &= ~E1000_RCTL_SZ_4096;
1833         rctl |= E1000_RCTL_BSEX;
1834         switch (adapter->rx_buffer_len) {
1835                 case E1000_RXBUFFER_256:
1836                         rctl |= E1000_RCTL_SZ_256;
1837                         rctl &= ~E1000_RCTL_BSEX;
1838                         break;
1839                 case E1000_RXBUFFER_512:
1840                         rctl |= E1000_RCTL_SZ_512;
1841                         rctl &= ~E1000_RCTL_BSEX;
1842                         break;
1843                 case E1000_RXBUFFER_1024:
1844                         rctl |= E1000_RCTL_SZ_1024;
1845                         rctl &= ~E1000_RCTL_BSEX;
1846                         break;
1847                 case E1000_RXBUFFER_2048:
1848                 default:
1849                         rctl |= E1000_RCTL_SZ_2048;
1850                         rctl &= ~E1000_RCTL_BSEX;
1851                         break;
1852                 case E1000_RXBUFFER_4096:
1853                         rctl |= E1000_RCTL_SZ_4096;
1854                         break;
1855                 case E1000_RXBUFFER_8192:
1856                         rctl |= E1000_RCTL_SZ_8192;
1857                         break;
1858                 case E1000_RXBUFFER_16384:
1859                         rctl |= E1000_RCTL_SZ_16384;
1860                         break;
1861         }
1862
1863 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1864         /* 82571 and greater support packet-split where the protocol
1865          * header is placed in skb->data and the packet data is
1866          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1867          * In the case of a non-split, skb->data is linearly filled,
1868          * followed by the page buffers.  Therefore, skb->data is
1869          * sized to hold the largest protocol header.
1870          */
1871         /* allocations using alloc_page take too long for regular MTU
1872          * so only enable packet split for jumbo frames */
1873         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1874         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1875             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1876                 adapter->rx_ps_pages = pages;
1877         else
1878                 adapter->rx_ps_pages = 0;
1879 #endif
1880         if (adapter->rx_ps_pages) {
1881                 /* Configure extra packet-split registers */
1882                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1883                 rfctl |= E1000_RFCTL_EXTEN;
1884                 /* disable packet split support for IPv6 extension headers,
1885                  * because some malformed IPv6 headers can hang the RX */
1886                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1887                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
1888
1889                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1890
1891                 rctl |= E1000_RCTL_DTYP_PS;
1892
1893                 psrctl |= adapter->rx_ps_bsize0 >>
1894                         E1000_PSRCTL_BSIZE0_SHIFT;
1895
1896                 switch (adapter->rx_ps_pages) {
1897                 case 3:
1898                         psrctl |= PAGE_SIZE <<
1899                                 E1000_PSRCTL_BSIZE3_SHIFT;
1900                 case 2:
1901                         psrctl |= PAGE_SIZE <<
1902                                 E1000_PSRCTL_BSIZE2_SHIFT;
1903                 case 1:
1904                         psrctl |= PAGE_SIZE >>
1905                                 E1000_PSRCTL_BSIZE1_SHIFT;
1906                         break;
1907                 }
1908
1909                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1910         }
1911
1912         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1913 }
1914
1915 /**
1916  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1917  * @adapter: board private structure
1918  *
1919  * Configure the Rx unit of the MAC after a reset.
1920  **/
1921
1922 static void
1923 e1000_configure_rx(struct e1000_adapter *adapter)
1924 {
1925         uint64_t rdba;
1926         struct e1000_hw *hw = &adapter->hw;
1927         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1928
1929         if (adapter->rx_ps_pages) {
1930                 /* this is a 32 byte descriptor */
1931                 rdlen = adapter->rx_ring[0].count *
1932                         sizeof(union e1000_rx_desc_packet_split);
1933                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1934                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1935         } else {
1936                 rdlen = adapter->rx_ring[0].count *
1937                         sizeof(struct e1000_rx_desc);
1938                 adapter->clean_rx = e1000_clean_rx_irq;
1939                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1940         }
1941
1942         /* disable receives while setting up the descriptors */
1943         rctl = E1000_READ_REG(hw, RCTL);
1944         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1945
1946         /* set the Receive Delay Timer Register */
1947         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1948
1949         if (hw->mac_type >= e1000_82540) {
1950                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1951                 if (adapter->itr_setting != 0)
1952                         E1000_WRITE_REG(hw, ITR,
1953                                 1000000000 / (adapter->itr * 256));
1954         }
1955
1956         if (hw->mac_type >= e1000_82571) {
1957                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1958                 /* Reset delay timers after every interrupt */
1959                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1960 #ifdef CONFIG_E1000_NAPI
1961                 /* Auto-Mask interrupts upon ICR access */
1962                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1963                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
1964 #endif
1965                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1966                 E1000_WRITE_FLUSH(hw);
1967         }
1968
1969         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1970          * the Base and Length of the Rx Descriptor Ring */
1971         switch (adapter->num_rx_queues) {
1972         case 1:
1973         default:
1974                 rdba = adapter->rx_ring[0].dma;
1975                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1976                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1977                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1978                 E1000_WRITE_REG(hw, RDT, 0);
1979                 E1000_WRITE_REG(hw, RDH, 0);
1980                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1981                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1982                 break;
1983         }
1984
1985         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1986         if (hw->mac_type >= e1000_82543) {
1987                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1988                 if (adapter->rx_csum == TRUE) {
1989                         rxcsum |= E1000_RXCSUM_TUOFL;
1990
1991                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1992                          * Must be used in conjunction with packet-split. */
1993                         if ((hw->mac_type >= e1000_82571) &&
1994                             (adapter->rx_ps_pages)) {
1995                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1996                         }
1997                 } else {
1998                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1999                         /* don't need to clear IPPCSE as it defaults to 0 */
2000                 }
2001                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2002         }
2003
2004         /* enable early receives on 82573, only takes effect if using > 2048
2005          * byte total frame size.  for example only for jumbo frames */
2006 #define E1000_ERT_2048 0x100
2007         if (hw->mac_type == e1000_82573)
2008                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2009
2010         /* Enable Receives */
2011         E1000_WRITE_REG(hw, RCTL, rctl);
2012 }
2013
2014 /**
2015  * e1000_free_tx_resources - Free Tx Resources per Queue
2016  * @adapter: board private structure
2017  * @tx_ring: Tx descriptor ring for a specific queue
2018  *
2019  * Free all transmit software resources
2020  **/
2021
2022 static void
2023 e1000_free_tx_resources(struct e1000_adapter *adapter,
2024                         struct e1000_tx_ring *tx_ring)
2025 {
2026         struct pci_dev *pdev = adapter->pdev;
2027
2028         e1000_clean_tx_ring(adapter, tx_ring);
2029
2030         vfree(tx_ring->buffer_info);
2031         tx_ring->buffer_info = NULL;
2032
2033         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2034
2035         tx_ring->desc = NULL;
2036 }
2037
2038 /**
2039  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2040  * @adapter: board private structure
2041  *
2042  * Free all transmit software resources
2043  **/
2044
2045 void
2046 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2047 {
2048         int i;
2049
2050         for (i = 0; i < adapter->num_tx_queues; i++)
2051                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2052 }
2053
2054 static void
2055 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2056                         struct e1000_buffer *buffer_info)
2057 {
2058         if (buffer_info->dma) {
2059                 pci_unmap_page(adapter->pdev,
2060                                 buffer_info->dma,
2061                                 buffer_info->length,
2062                                 PCI_DMA_TODEVICE);
2063                 buffer_info->dma = 0;
2064         }
2065         if (buffer_info->skb) {
2066                 dev_kfree_skb_any(buffer_info->skb);
2067                 buffer_info->skb = NULL;
2068         }
2069         /* buffer_info must be completely set up in the transmit path */
2070 }
2071
2072 /**
2073  * e1000_clean_tx_ring - Free Tx Buffers
2074  * @adapter: board private structure
2075  * @tx_ring: ring to be cleaned
2076  **/
2077
2078 static void
2079 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2080                     struct e1000_tx_ring *tx_ring)
2081 {
2082         struct e1000_buffer *buffer_info;
2083         unsigned long size;
2084         unsigned int i;
2085
2086         /* Free all the Tx ring sk_buffs */
2087
2088         for (i = 0; i < tx_ring->count; i++) {
2089                 buffer_info = &tx_ring->buffer_info[i];
2090                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2091         }
2092
2093         size = sizeof(struct e1000_buffer) * tx_ring->count;
2094         memset(tx_ring->buffer_info, 0, size);
2095
2096         /* Zero out the descriptor ring */
2097
2098         memset(tx_ring->desc, 0, tx_ring->size);
2099
2100         tx_ring->next_to_use = 0;
2101         tx_ring->next_to_clean = 0;
2102         tx_ring->last_tx_tso = 0;
2103
2104         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2105         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2106 }
2107
2108 /**
2109  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2110  * @adapter: board private structure
2111  **/
2112
2113 static void
2114 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2115 {
2116         int i;
2117
2118         for (i = 0; i < adapter->num_tx_queues; i++)
2119                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2120 }
2121
2122 /**
2123  * e1000_free_rx_resources - Free Rx Resources
2124  * @adapter: board private structure
2125  * @rx_ring: ring to clean the resources from
2126  *
2127  * Free all receive software resources
2128  **/
2129
2130 static void
2131 e1000_free_rx_resources(struct e1000_adapter *adapter,
2132                         struct e1000_rx_ring *rx_ring)
2133 {
2134         struct pci_dev *pdev = adapter->pdev;
2135
2136         e1000_clean_rx_ring(adapter, rx_ring);
2137
2138         vfree(rx_ring->buffer_info);
2139         rx_ring->buffer_info = NULL;
2140         kfree(rx_ring->ps_page);
2141         rx_ring->ps_page = NULL;
2142         kfree(rx_ring->ps_page_dma);
2143         rx_ring->ps_page_dma = NULL;
2144
2145         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2146
2147         rx_ring->desc = NULL;
2148 }
2149
2150 /**
2151  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2152  * @adapter: board private structure
2153  *
2154  * Free all receive software resources
2155  **/
2156
2157 void
2158 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2159 {
2160         int i;
2161
2162         for (i = 0; i < adapter->num_rx_queues; i++)
2163                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2164 }
2165
2166 /**
2167  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2168  * @adapter: board private structure
2169  * @rx_ring: ring to free buffers from
2170  **/
2171
2172 static void
2173 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2174                     struct e1000_rx_ring *rx_ring)
2175 {
2176         struct e1000_buffer *buffer_info;
2177         struct e1000_ps_page *ps_page;
2178         struct e1000_ps_page_dma *ps_page_dma;
2179         struct pci_dev *pdev = adapter->pdev;
2180         unsigned long size;
2181         unsigned int i, j;
2182
2183         /* Free all the Rx ring sk_buffs */
2184         for (i = 0; i < rx_ring->count; i++) {
2185                 buffer_info = &rx_ring->buffer_info[i];
2186                 if (buffer_info->skb) {
2187                         pci_unmap_single(pdev,
2188                                          buffer_info->dma,
2189                                          buffer_info->length,
2190                                          PCI_DMA_FROMDEVICE);
2191
2192                         dev_kfree_skb(buffer_info->skb);
2193                         buffer_info->skb = NULL;
2194                 }
2195                 ps_page = &rx_ring->ps_page[i];
2196                 ps_page_dma = &rx_ring->ps_page_dma[i];
2197                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2198                         if (!ps_page->ps_page[j]) break;
2199                         pci_unmap_page(pdev,
2200                                        ps_page_dma->ps_page_dma[j],
2201                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2202                         ps_page_dma->ps_page_dma[j] = 0;
2203                         put_page(ps_page->ps_page[j]);
2204                         ps_page->ps_page[j] = NULL;
2205                 }
2206         }
2207
2208         size = sizeof(struct e1000_buffer) * rx_ring->count;
2209         memset(rx_ring->buffer_info, 0, size);
2210         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2211         memset(rx_ring->ps_page, 0, size);
2212         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2213         memset(rx_ring->ps_page_dma, 0, size);
2214
2215         /* Zero out the descriptor ring */
2216
2217         memset(rx_ring->desc, 0, rx_ring->size);
2218
2219         rx_ring->next_to_clean = 0;
2220         rx_ring->next_to_use = 0;
2221
2222         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2223         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2224 }
2225
2226 /**
2227  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2228  * @adapter: board private structure
2229  **/
2230
2231 static void
2232 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2233 {
2234         int i;
2235
2236         for (i = 0; i < adapter->num_rx_queues; i++)
2237                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2238 }
2239
2240 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2241  * and memory write and invalidate disabled for certain operations
2242  */
2243 static void
2244 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2245 {
2246         struct net_device *netdev = adapter->netdev;
2247         uint32_t rctl;
2248
2249         e1000_pci_clear_mwi(&adapter->hw);
2250
2251         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2252         rctl |= E1000_RCTL_RST;
2253         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2254         E1000_WRITE_FLUSH(&adapter->hw);
2255         mdelay(5);
2256
2257         if (netif_running(netdev))
2258                 e1000_clean_all_rx_rings(adapter);
2259 }
2260
2261 static void
2262 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2263 {
2264         struct net_device *netdev = adapter->netdev;
2265         uint32_t rctl;
2266
2267         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2268         rctl &= ~E1000_RCTL_RST;
2269         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2270         E1000_WRITE_FLUSH(&adapter->hw);
2271         mdelay(5);
2272
2273         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2274                 e1000_pci_set_mwi(&adapter->hw);
2275
2276         if (netif_running(netdev)) {
2277                 /* No need to loop, because 82542 supports only 1 queue */
2278                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2279                 e1000_configure_rx(adapter);
2280                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2281         }
2282 }
2283
2284 /**
2285  * e1000_set_mac - Change the Ethernet Address of the NIC
2286  * @netdev: network interface device structure
2287  * @p: pointer to an address structure
2288  *
2289  * Returns 0 on success, negative on failure
2290  **/
2291
2292 static int
2293 e1000_set_mac(struct net_device *netdev, void *p)
2294 {
2295         struct e1000_adapter *adapter = netdev_priv(netdev);
2296         struct sockaddr *addr = p;
2297
2298         if (!is_valid_ether_addr(addr->sa_data))
2299                 return -EADDRNOTAVAIL;
2300
2301         /* 82542 2.0 needs to be in reset to write receive address registers */
2302
2303         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2304                 e1000_enter_82542_rst(adapter);
2305
2306         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2307         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2308
2309         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2310
2311         /* With 82571 controllers, LAA may be overwritten (with the default)
2312          * due to controller reset from the other port. */
2313         if (adapter->hw.mac_type == e1000_82571) {
2314                 /* activate the work around */
2315                 adapter->hw.laa_is_present = 1;
2316
2317                 /* Hold a copy of the LAA in RAR[14] This is done so that
2318                  * between the time RAR[0] gets clobbered  and the time it
2319                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2320                  * of the RARs and no incoming packets directed to this port
2321                  * are dropped. Eventaully the LAA will be in RAR[0] and
2322                  * RAR[14] */
2323                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2324                                         E1000_RAR_ENTRIES - 1);
2325         }
2326
2327         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2328                 e1000_leave_82542_rst(adapter);
2329
2330         return 0;
2331 }
2332
2333 /**
2334  * e1000_set_multi - Multicast and Promiscuous mode set
2335  * @netdev: network interface device structure
2336  *
2337  * The set_multi entry point is called whenever the multicast address
2338  * list or the network interface flags are updated.  This routine is
2339  * responsible for configuring the hardware for proper multicast,
2340  * promiscuous mode, and all-multi behavior.
2341  **/
2342
2343 static void
2344 e1000_set_multi(struct net_device *netdev)
2345 {
2346         struct e1000_adapter *adapter = netdev_priv(netdev);
2347         struct e1000_hw *hw = &adapter->hw;
2348         struct dev_mc_list *mc_ptr;
2349         uint32_t rctl;
2350         uint32_t hash_value;
2351         int i, rar_entries = E1000_RAR_ENTRIES;
2352         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2353                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2354                                 E1000_NUM_MTA_REGISTERS;
2355
2356         if (adapter->hw.mac_type == e1000_ich8lan)
2357                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2358
2359         /* reserve RAR[14] for LAA over-write work-around */
2360         if (adapter->hw.mac_type == e1000_82571)
2361                 rar_entries--;
2362
2363         /* Check for Promiscuous and All Multicast modes */
2364
2365         rctl = E1000_READ_REG(hw, RCTL);
2366
2367         if (netdev->flags & IFF_PROMISC) {
2368                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2369         } else if (netdev->flags & IFF_ALLMULTI) {
2370                 rctl |= E1000_RCTL_MPE;
2371                 rctl &= ~E1000_RCTL_UPE;
2372         } else {
2373                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2374         }
2375
2376         E1000_WRITE_REG(hw, RCTL, rctl);
2377
2378         /* 82542 2.0 needs to be in reset to write receive address registers */
2379
2380         if (hw->mac_type == e1000_82542_rev2_0)
2381                 e1000_enter_82542_rst(adapter);
2382
2383         /* load the first 14 multicast address into the exact filters 1-14
2384          * RAR 0 is used for the station MAC adddress
2385          * if there are not 14 addresses, go ahead and clear the filters
2386          * -- with 82571 controllers only 0-13 entries are filled here
2387          */
2388         mc_ptr = netdev->mc_list;
2389
2390         for (i = 1; i < rar_entries; i++) {
2391                 if (mc_ptr) {
2392                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2393                         mc_ptr = mc_ptr->next;
2394                 } else {
2395                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2396                         E1000_WRITE_FLUSH(hw);
2397                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2398                         E1000_WRITE_FLUSH(hw);
2399                 }
2400         }
2401
2402         /* clear the old settings from the multicast hash table */
2403
2404         for (i = 0; i < mta_reg_count; i++) {
2405                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2406                 E1000_WRITE_FLUSH(hw);
2407         }
2408
2409         /* load any remaining addresses into the hash table */
2410
2411         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2412                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2413                 e1000_mta_set(hw, hash_value);
2414         }
2415
2416         if (hw->mac_type == e1000_82542_rev2_0)
2417                 e1000_leave_82542_rst(adapter);
2418 }
2419
2420 /* Need to wait a few seconds after link up to get diagnostic information from
2421  * the phy */
2422
2423 static void
2424 e1000_update_phy_info(unsigned long data)
2425 {
2426         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2427         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2428 }
2429
2430 /**
2431  * e1000_82547_tx_fifo_stall - Timer Call-back
2432  * @data: pointer to adapter cast into an unsigned long
2433  **/
2434
2435 static void
2436 e1000_82547_tx_fifo_stall(unsigned long data)
2437 {
2438         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2439         struct net_device *netdev = adapter->netdev;
2440         uint32_t tctl;
2441
2442         if (atomic_read(&adapter->tx_fifo_stall)) {
2443                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2444                     E1000_READ_REG(&adapter->hw, TDH)) &&
2445                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2446                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2447                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2448                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2449                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2450                         E1000_WRITE_REG(&adapter->hw, TCTL,
2451                                         tctl & ~E1000_TCTL_EN);
2452                         E1000_WRITE_REG(&adapter->hw, TDFT,
2453                                         adapter->tx_head_addr);
2454                         E1000_WRITE_REG(&adapter->hw, TDFH,
2455                                         adapter->tx_head_addr);
2456                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2457                                         adapter->tx_head_addr);
2458                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2459                                         adapter->tx_head_addr);
2460                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2461                         E1000_WRITE_FLUSH(&adapter->hw);
2462
2463                         adapter->tx_fifo_head = 0;
2464                         atomic_set(&adapter->tx_fifo_stall, 0);
2465                         netif_wake_queue(netdev);
2466                 } else {
2467                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2468                 }
2469         }
2470 }
2471
2472 /**
2473  * e1000_watchdog - Timer Call-back
2474  * @data: pointer to adapter cast into an unsigned long
2475  **/
2476 static void
2477 e1000_watchdog(unsigned long data)
2478 {
2479         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2480         struct net_device *netdev = adapter->netdev;
2481         struct e1000_tx_ring *txdr = adapter->tx_ring;
2482         uint32_t link, tctl;
2483         int32_t ret_val;
2484
2485         ret_val = e1000_check_for_link(&adapter->hw);
2486         if ((ret_val == E1000_ERR_PHY) &&
2487             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2488             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2489                 /* See e1000_kumeran_lock_loss_workaround() */
2490                 DPRINTK(LINK, INFO,
2491                         "Gigabit has been disabled, downgrading speed\n");
2492         }
2493
2494         if (adapter->hw.mac_type == e1000_82573) {
2495                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2496                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2497                         e1000_update_mng_vlan(adapter);
2498         }
2499
2500         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2501            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2502                 link = !adapter->hw.serdes_link_down;
2503         else
2504                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2505
2506         if (link) {
2507                 if (!netif_carrier_ok(netdev)) {
2508                         boolean_t txb2b = 1;
2509                         e1000_get_speed_and_duplex(&adapter->hw,
2510                                                    &adapter->link_speed,
2511                                                    &adapter->link_duplex);
2512
2513                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2514                                adapter->link_speed,
2515                                adapter->link_duplex == FULL_DUPLEX ?
2516                                "Full Duplex" : "Half Duplex");
2517
2518                         /* tweak tx_queue_len according to speed/duplex
2519                          * and adjust the timeout factor */
2520                         netdev->tx_queue_len = adapter->tx_queue_len;
2521                         adapter->tx_timeout_factor = 1;
2522                         switch (adapter->link_speed) {
2523                         case SPEED_10:
2524                                 txb2b = 0;
2525                                 netdev->tx_queue_len = 10;
2526                                 adapter->tx_timeout_factor = 8;
2527                                 break;
2528                         case SPEED_100:
2529                                 txb2b = 0;
2530                                 netdev->tx_queue_len = 100;
2531                                 /* maybe add some timeout factor ? */
2532                                 break;
2533                         }
2534
2535                         if ((adapter->hw.mac_type == e1000_82571 ||
2536                              adapter->hw.mac_type == e1000_82572) &&
2537                             txb2b == 0) {
2538                                 uint32_t tarc0;
2539                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2540                                 tarc0 &= ~(1 << 21);
2541                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2542                         }
2543
2544 #ifdef NETIF_F_TSO
2545                         /* disable TSO for pcie and 10/100 speeds, to avoid
2546                          * some hardware issues */
2547                         if (!adapter->tso_force &&
2548                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2549                                 switch (adapter->link_speed) {
2550                                 case SPEED_10:
2551                                 case SPEED_100:
2552                                         DPRINTK(PROBE,INFO,
2553                                         "10/100 speed: disabling TSO\n");
2554                                         netdev->features &= ~NETIF_F_TSO;
2555 #ifdef NETIF_F_TSO6
2556                                         netdev->features &= ~NETIF_F_TSO6;
2557 #endif
2558                                         break;
2559                                 case SPEED_1000:
2560                                         netdev->features |= NETIF_F_TSO;
2561 #ifdef NETIF_F_TSO6
2562                                         netdev->features |= NETIF_F_TSO6;
2563 #endif
2564                                         break;
2565                                 default:
2566                                         /* oops */
2567                                         break;
2568                                 }
2569                         }
2570 #endif
2571
2572                         /* enable transmits in the hardware, need to do this
2573                          * after setting TARC0 */
2574                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2575                         tctl |= E1000_TCTL_EN;
2576                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2577
2578                         netif_carrier_on(netdev);
2579                         netif_wake_queue(netdev);
2580                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2581                         adapter->smartspeed = 0;
2582                 } else {
2583                         /* make sure the receive unit is started */
2584                         if (adapter->hw.rx_needs_kicking) {
2585                                 struct e1000_hw *hw = &adapter->hw;
2586                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2587                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2588                         }
2589                 }
2590         } else {
2591                 if (netif_carrier_ok(netdev)) {
2592                         adapter->link_speed = 0;
2593                         adapter->link_duplex = 0;
2594                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2595                         netif_carrier_off(netdev);
2596                         netif_stop_queue(netdev);
2597                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2598
2599                         /* 80003ES2LAN workaround--
2600                          * For packet buffer work-around on link down event;
2601                          * disable receives in the ISR and
2602                          * reset device here in the watchdog
2603                          */
2604                         if (adapter->hw.mac_type == e1000_80003es2lan)
2605                                 /* reset device */
2606                                 schedule_work(&adapter->reset_task);
2607                 }
2608
2609                 e1000_smartspeed(adapter);
2610         }
2611
2612         e1000_update_stats(adapter);
2613
2614         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2615         adapter->tpt_old = adapter->stats.tpt;
2616         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2617         adapter->colc_old = adapter->stats.colc;
2618
2619         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2620         adapter->gorcl_old = adapter->stats.gorcl;
2621         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2622         adapter->gotcl_old = adapter->stats.gotcl;
2623
2624         e1000_update_adaptive(&adapter->hw);
2625
2626         if (!netif_carrier_ok(netdev)) {
2627                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2628                         /* We've lost link, so the controller stops DMA,
2629                          * but we've got queued Tx work that's never going
2630                          * to get done, so reset controller to flush Tx.
2631                          * (Do the reset outside of interrupt context). */
2632                         adapter->tx_timeout_count++;
2633                         schedule_work(&adapter->reset_task);
2634                 }
2635         }
2636
2637         /* Cause software interrupt to ensure rx ring is cleaned */
2638         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2639
2640         /* Force detection of hung controller every watchdog period */
2641         adapter->detect_tx_hung = TRUE;
2642
2643         /* With 82571 controllers, LAA may be overwritten due to controller
2644          * reset from the other port. Set the appropriate LAA in RAR[0] */
2645         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2646                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2647
2648         /* Reset the timer */
2649         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2650 }
2651
2652 enum latency_range {
2653         lowest_latency = 0,
2654         low_latency = 1,
2655         bulk_latency = 2,
2656         latency_invalid = 255
2657 };
2658
2659 /**
2660  * e1000_update_itr - update the dynamic ITR value based on statistics
2661  *      Stores a new ITR value based on packets and byte
2662  *      counts during the last interrupt.  The advantage of per interrupt
2663  *      computation is faster updates and more accurate ITR for the current
2664  *      traffic pattern.  Constants in this function were computed
2665  *      based on theoretical maximum wire speed and thresholds were set based
2666  *      on testing data as well as attempting to minimize response time
2667  *      while increasing bulk throughput.
2668  *      this functionality is controlled by the InterruptThrottleRate module
2669  *      parameter (see e1000_param.c)
2670  * @adapter: pointer to adapter
2671  * @itr_setting: current adapter->itr
2672  * @packets: the number of packets during this measurement interval
2673  * @bytes: the number of bytes during this measurement interval
2674  **/
2675 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2676                                    uint16_t itr_setting,
2677                                    int packets,
2678                                    int bytes)
2679 {
2680         unsigned int retval = itr_setting;
2681         struct e1000_hw *hw = &adapter->hw;
2682
2683         if (unlikely(hw->mac_type < e1000_82540))
2684                 goto update_itr_done;
2685
2686         if (packets == 0)
2687                 goto update_itr_done;
2688
2689         switch (itr_setting) {
2690         case lowest_latency:
2691                 /* jumbo frames get bulk treatment*/
2692                 if (bytes/packets > 8000)
2693                         retval = bulk_latency;
2694                 else if ((packets < 5) && (bytes > 512))
2695                         retval = low_latency;
2696                 break;
2697         case low_latency:  /* 50 usec aka 20000 ints/s */
2698                 if (bytes > 10000) {
2699                         /* jumbo frames need bulk latency setting */
2700                         if (bytes/packets > 8000)
2701                                 retval = bulk_latency;
2702                         else if ((packets < 10) || ((bytes/packets) > 1200))
2703                                 retval = bulk_latency;
2704                         else if ((packets > 35))
2705                                 retval = lowest_latency;
2706                 } else if (bytes/packets > 2000)
2707                         retval = bulk_latency;
2708                 else if (packets <= 2 && bytes < 512)
2709                         retval = lowest_latency;
2710                 break;
2711         case bulk_latency: /* 250 usec aka 4000 ints/s */
2712                 if (bytes > 25000) {
2713                         if (packets > 35)
2714                                 retval = low_latency;
2715                 } else if (bytes < 6000) {
2716                         retval = low_latency;
2717                 }
2718                 break;
2719         }
2720
2721 update_itr_done:
2722         return retval;
2723 }
2724
2725 static void e1000_set_itr(struct e1000_adapter *adapter)
2726 {
2727         struct e1000_hw *hw = &adapter->hw;
2728         uint16_t current_itr;
2729         uint32_t new_itr = adapter->itr;
2730
2731         if (unlikely(hw->mac_type < e1000_82540))
2732                 return;
2733
2734         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2735         if (unlikely(adapter->link_speed != SPEED_1000)) {
2736                 current_itr = 0;
2737                 new_itr = 4000;
2738                 goto set_itr_now;
2739         }
2740
2741         adapter->tx_itr = e1000_update_itr(adapter,
2742                                     adapter->tx_itr,
2743                                     adapter->total_tx_packets,
2744                                     adapter->total_tx_bytes);
2745         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2746         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2747                 adapter->tx_itr = low_latency;
2748
2749         adapter->rx_itr = e1000_update_itr(adapter,
2750                                     adapter->rx_itr,
2751                                     adapter->total_rx_packets,
2752                                     adapter->total_rx_bytes);
2753         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2754         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2755                 adapter->rx_itr = low_latency;
2756
2757         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2758
2759         switch (current_itr) {
2760         /* counts and packets in update_itr are dependent on these numbers */
2761         case lowest_latency:
2762                 new_itr = 70000;
2763                 break;
2764         case low_latency:
2765                 new_itr = 20000; /* aka hwitr = ~200 */
2766                 break;
2767         case bulk_latency:
2768                 new_itr = 4000;
2769                 break;
2770         default:
2771                 break;
2772         }
2773
2774 set_itr_now:
2775         if (new_itr != adapter->itr) {
2776                 /* this attempts to bias the interrupt rate towards Bulk
2777                  * by adding intermediate steps when interrupt rate is
2778                  * increasing */
2779                 new_itr = new_itr > adapter->itr ?
2780                              min(adapter->itr + (new_itr >> 2), new_itr) :
2781                              new_itr;
2782                 adapter->itr = new_itr;
2783                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2784         }
2785
2786         return;
2787 }
2788
2789 #define E1000_TX_FLAGS_CSUM             0x00000001
2790 #define E1000_TX_FLAGS_VLAN             0x00000002
2791 #define E1000_TX_FLAGS_TSO              0x00000004
2792 #define E1000_TX_FLAGS_IPV4             0x00000008
2793 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2794 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2795
2796 static int
2797 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2798           struct sk_buff *skb)
2799 {
2800 #ifdef NETIF_F_TSO
2801         struct e1000_context_desc *context_desc;
2802         struct e1000_buffer *buffer_info;
2803         unsigned int i;
2804         uint32_t cmd_length = 0;
2805         uint16_t ipcse = 0, tucse, mss;
2806         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2807         int err;
2808
2809         if (skb_is_gso(skb)) {
2810                 if (skb_header_cloned(skb)) {
2811                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2812                         if (err)
2813                                 return err;
2814                 }
2815
2816                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2817                 mss = skb_shinfo(skb)->gso_size;
2818                 if (skb->protocol == htons(ETH_P_IP)) {
2819                         skb->nh.iph->tot_len = 0;
2820                         skb->nh.iph->check = 0;
2821                         skb->h.th->check =
2822                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2823                                                    skb->nh.iph->daddr,
2824                                                    0,
2825                                                    IPPROTO_TCP,
2826                                                    0);
2827                         cmd_length = E1000_TXD_CMD_IP;
2828                         ipcse = skb->h.raw - skb->data - 1;
2829 #ifdef NETIF_F_TSO6
2830                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2831                         skb->nh.ipv6h->payload_len = 0;
2832                         skb->h.th->check =
2833                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2834                                                  &skb->nh.ipv6h->daddr,
2835                                                  0,
2836                                                  IPPROTO_TCP,
2837                                                  0);
2838                         ipcse = 0;
2839 #endif
2840                 }
2841                 ipcss = skb->nh.raw - skb->data;
2842                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2843                 tucss = skb->h.raw - skb->data;
2844                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2845                 tucse = 0;
2846
2847                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2848                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2849
2850                 i = tx_ring->next_to_use;
2851                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2852                 buffer_info = &tx_ring->buffer_info[i];
2853
2854                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2855                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2856                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2857                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2858                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2859                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2860                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2861                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2862                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2863
2864                 buffer_info->time_stamp = jiffies;
2865                 buffer_info->next_to_watch = i;
2866
2867                 if (++i == tx_ring->count) i = 0;
2868                 tx_ring->next_to_use = i;
2869
2870                 return TRUE;
2871         }
2872 #endif
2873
2874         return FALSE;
2875 }
2876
2877 static boolean_t
2878 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2879               struct sk_buff *skb)
2880 {
2881         struct e1000_context_desc *context_desc;
2882         struct e1000_buffer *buffer_info;
2883         unsigned int i;
2884         uint8_t css;
2885
2886         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2887                 css = skb->h.raw - skb->data;
2888
2889                 i = tx_ring->next_to_use;
2890                 buffer_info = &tx_ring->buffer_info[i];
2891                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2892
2893                 context_desc->upper_setup.tcp_fields.tucss = css;
2894                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset;
2895                 context_desc->upper_setup.tcp_fields.tucse = 0;
2896                 context_desc->tcp_seg_setup.data = 0;
2897                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2898
2899                 buffer_info->time_stamp = jiffies;
2900                 buffer_info->next_to_watch = i;
2901
2902                 if (unlikely(++i == tx_ring->count)) i = 0;
2903                 tx_ring->next_to_use = i;
2904
2905                 return TRUE;
2906         }
2907
2908         return FALSE;
2909 }
2910
2911 #define E1000_MAX_TXD_PWR       12
2912 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2913
2914 static int
2915 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2916              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2917              unsigned int nr_frags, unsigned int mss)
2918 {
2919         struct e1000_buffer *buffer_info;
2920         unsigned int len = skb->len;
2921         unsigned int offset = 0, size, count = 0, i;
2922         unsigned int f;
2923         len -= skb->data_len;
2924
2925         i = tx_ring->next_to_use;
2926
2927         while (len) {
2928                 buffer_info = &tx_ring->buffer_info[i];
2929                 size = min(len, max_per_txd);
2930 #ifdef NETIF_F_TSO
2931                 /* Workaround for Controller erratum --
2932                  * descriptor for non-tso packet in a linear SKB that follows a
2933                  * tso gets written back prematurely before the data is fully
2934                  * DMA'd to the controller */
2935                 if (!skb->data_len && tx_ring->last_tx_tso &&
2936                     !skb_is_gso(skb)) {
2937                         tx_ring->last_tx_tso = 0;
2938                         size -= 4;
2939                 }
2940
2941                 /* Workaround for premature desc write-backs
2942                  * in TSO mode.  Append 4-byte sentinel desc */
2943                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2944                         size -= 4;
2945 #endif
2946                 /* work-around for errata 10 and it applies
2947                  * to all controllers in PCI-X mode
2948                  * The fix is to make sure that the first descriptor of a
2949                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2950                  */
2951                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2952                                 (size > 2015) && count == 0))
2953                         size = 2015;
2954
2955                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2956                  * terminating buffers within evenly-aligned dwords. */
2957                 if (unlikely(adapter->pcix_82544 &&
2958                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2959                    size > 4))
2960                         size -= 4;
2961
2962                 buffer_info->length = size;
2963                 buffer_info->dma =
2964                         pci_map_single(adapter->pdev,
2965                                 skb->data + offset,
2966                                 size,
2967                                 PCI_DMA_TODEVICE);
2968                 buffer_info->time_stamp = jiffies;
2969                 buffer_info->next_to_watch = i;
2970
2971                 len -= size;
2972                 offset += size;
2973                 count++;
2974                 if (unlikely(++i == tx_ring->count)) i = 0;
2975         }
2976
2977         for (f = 0; f < nr_frags; f++) {
2978                 struct skb_frag_struct *frag;
2979
2980                 frag = &skb_shinfo(skb)->frags[f];
2981                 len = frag->size;
2982                 offset = frag->page_offset;
2983
2984                 while (len) {
2985                         buffer_info = &tx_ring->buffer_info[i];
2986                         size = min(len, max_per_txd);
2987 #ifdef NETIF_F_TSO
2988                         /* Workaround for premature desc write-backs
2989                          * in TSO mode.  Append 4-byte sentinel desc */
2990                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2991                                 size -= 4;
2992 #endif
2993                         /* Workaround for potential 82544 hang in PCI-X.
2994                          * Avoid terminating buffers within evenly-aligned
2995                          * dwords. */
2996                         if (unlikely(adapter->pcix_82544 &&
2997                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2998                            size > 4))
2999                                 size -= 4;
3000
3001                         buffer_info->length = size;
3002                         buffer_info->dma =
3003                                 pci_map_page(adapter->pdev,
3004                                         frag->page,
3005                                         offset,
3006                                         size,
3007                                         PCI_DMA_TODEVICE);
3008                         buffer_info->time_stamp = jiffies;
3009                         buffer_info->next_to_watch = i;
3010
3011                         len -= size;
3012                         offset += size;
3013                         count++;
3014                         if (unlikely(++i == tx_ring->count)) i = 0;
3015                 }
3016         }
3017
3018         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3019         tx_ring->buffer_info[i].skb = skb;
3020         tx_ring->buffer_info[first].next_to_watch = i;
3021
3022         return count;
3023 }
3024
3025 static void
3026 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3027                int tx_flags, int count)
3028 {
3029         struct e1000_tx_desc *tx_desc = NULL;
3030         struct e1000_buffer *buffer_info;
3031         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3032         unsigned int i;
3033
3034         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3035                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3036                              E1000_TXD_CMD_TSE;
3037                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3038
3039                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3040                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3041         }
3042
3043         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3044                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3045                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3046         }
3047
3048         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3049                 txd_lower |= E1000_TXD_CMD_VLE;
3050                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3051         }
3052
3053         i = tx_ring->next_to_use;
3054
3055         while (count--) {
3056                 buffer_info = &tx_ring->buffer_info[i];
3057                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3058                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3059                 tx_desc->lower.data =
3060                         cpu_to_le32(txd_lower | buffer_info->length);
3061                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3062                 if (unlikely(++i == tx_ring->count)) i = 0;
3063         }
3064
3065         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3066
3067         /* Force memory writes to complete before letting h/w
3068          * know there are new descriptors to fetch.  (Only
3069          * applicable for weak-ordered memory model archs,
3070          * such as IA-64). */
3071         wmb();
3072
3073         tx_ring->next_to_use = i;
3074         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3075         /* we need this if more than one processor can write to our tail
3076          * at a time, it syncronizes IO on IA64/Altix systems */
3077         mmiowb();
3078 }
3079
3080 /**
3081  * 82547 workaround to avoid controller hang in half-duplex environment.
3082  * The workaround is to avoid queuing a large packet that would span
3083  * the internal Tx FIFO ring boundary by notifying the stack to resend
3084  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3085  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3086  * to the beginning of the Tx FIFO.
3087  **/
3088
3089 #define E1000_FIFO_HDR                  0x10
3090 #define E1000_82547_PAD_LEN             0x3E0
3091
3092 static int
3093 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3094 {
3095         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3096         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3097
3098         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
3099
3100         if (adapter->link_duplex != HALF_DUPLEX)
3101                 goto no_fifo_stall_required;
3102
3103         if (atomic_read(&adapter->tx_fifo_stall))
3104                 return 1;
3105
3106         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3107                 atomic_set(&adapter->tx_fifo_stall, 1);
3108                 return 1;
3109         }
3110
3111 no_fifo_stall_required:
3112         adapter->tx_fifo_head += skb_fifo_len;
3113         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3114                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3115         return 0;
3116 }
3117
3118 #define MINIMUM_DHCP_PACKET_SIZE 282
3119 static int
3120 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3121 {
3122         struct e1000_hw *hw =  &adapter->hw;
3123         uint16_t length, offset;
3124         if (vlan_tx_tag_present(skb)) {
3125                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3126                         ( adapter->hw.mng_cookie.status &
3127                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3128                         return 0;
3129         }
3130         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3131                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3132                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3133                         const struct iphdr *ip =
3134                                 (struct iphdr *)((uint8_t *)skb->data+14);
3135                         if (IPPROTO_UDP == ip->protocol) {
3136                                 struct udphdr *udp =
3137                                         (struct udphdr *)((uint8_t *)ip +
3138                                                 (ip->ihl << 2));
3139                                 if (ntohs(udp->dest) == 67) {
3140                                         offset = (uint8_t *)udp + 8 - skb->data;
3141                                         length = skb->len - offset;
3142
3143                                         return e1000_mng_write_dhcp_info(hw,
3144                                                         (uint8_t *)udp + 8,
3145                                                         length);
3146                                 }
3147                         }
3148                 }
3149         }
3150         return 0;
3151 }
3152
3153 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3154 {
3155         struct e1000_adapter *adapter = netdev_priv(netdev);
3156         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3157
3158         netif_stop_queue(netdev);
3159         /* Herbert's original patch had:
3160          *  smp_mb__after_netif_stop_queue();
3161          * but since that doesn't exist yet, just open code it. */
3162         smp_mb();
3163
3164         /* We need to check again in a case another CPU has just
3165          * made room available. */
3166         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3167                 return -EBUSY;
3168
3169         /* A reprieve! */
3170         netif_start_queue(netdev);
3171         ++adapter->restart_queue;
3172         return 0;
3173 }
3174
3175 static int e1000_maybe_stop_tx(struct net_device *netdev,
3176                                struct e1000_tx_ring *tx_ring, int size)
3177 {
3178         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3179                 return 0;
3180         return __e1000_maybe_stop_tx(netdev, size);
3181 }
3182
3183 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3184 static int
3185 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3186 {
3187         struct e1000_adapter *adapter = netdev_priv(netdev);
3188         struct e1000_tx_ring *tx_ring;
3189         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3190         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3191         unsigned int tx_flags = 0;
3192         unsigned int len = skb->len;
3193         unsigned long flags;
3194         unsigned int nr_frags = 0;
3195         unsigned int mss = 0;
3196         int count = 0;
3197         int tso;
3198         unsigned int f;
3199         len -= skb->data_len;
3200
3201         /* This goes back to the question of how to logically map a tx queue
3202          * to a flow.  Right now, performance is impacted slightly negatively
3203          * if using multiple tx queues.  If the stack breaks away from a
3204          * single qdisc implementation, we can look at this again. */
3205         tx_ring = adapter->tx_ring;
3206
3207         if (unlikely(skb->len <= 0)) {
3208                 dev_kfree_skb_any(skb);
3209                 return NETDEV_TX_OK;
3210         }
3211
3212         /* 82571 and newer doesn't need the workaround that limited descriptor
3213          * length to 4kB */
3214         if (adapter->hw.mac_type >= e1000_82571)
3215                 max_per_txd = 8192;
3216
3217 #ifdef NETIF_F_TSO
3218         mss = skb_shinfo(skb)->gso_size;
3219         /* The controller does a simple calculation to
3220          * make sure there is enough room in the FIFO before
3221          * initiating the DMA for each buffer.  The calc is:
3222          * 4 = ceil(buffer len/mss).  To make sure we don't
3223          * overrun the FIFO, adjust the max buffer len if mss
3224          * drops. */
3225         if (mss) {
3226                 uint8_t hdr_len;
3227                 max_per_txd = min(mss << 2, max_per_txd);
3228                 max_txd_pwr = fls(max_per_txd) - 1;
3229
3230                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3231                 * points to just header, pull a few bytes of payload from
3232                 * frags into skb->data */
3233                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
3234                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3235                         switch (adapter->hw.mac_type) {
3236                                 unsigned int pull_size;
3237                         case e1000_82571:
3238                         case e1000_82572:
3239                         case e1000_82573:
3240                         case e1000_ich8lan:
3241                                 pull_size = min((unsigned int)4, skb->data_len);
3242                                 if (!__pskb_pull_tail(skb, pull_size)) {
3243                                         DPRINTK(DRV, ERR,
3244                                                 "__pskb_pull_tail failed.\n");
3245                                         dev_kfree_skb_any(skb);
3246                                         return NETDEV_TX_OK;
3247                                 }
3248                                 len = skb->len - skb->data_len;
3249                                 break;
3250                         default:
3251                                 /* do nothing */
3252                                 break;
3253                         }
3254                 }
3255         }
3256
3257         /* reserve a descriptor for the offload context */
3258         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3259                 count++;
3260         count++;
3261 #else
3262         if (skb->ip_summed == CHECKSUM_PARTIAL)
3263                 count++;
3264 #endif
3265
3266 #ifdef NETIF_F_TSO
3267         /* Controller Erratum workaround */
3268         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3269                 count++;
3270 #endif
3271
3272         count += TXD_USE_COUNT(len, max_txd_pwr);
3273
3274         if (adapter->pcix_82544)
3275                 count++;
3276
3277         /* work-around for errata 10 and it applies to all controllers
3278          * in PCI-X mode, so add one more descriptor to the count
3279          */
3280         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3281                         (len > 2015)))
3282                 count++;
3283
3284         nr_frags = skb_shinfo(skb)->nr_frags;
3285         for (f = 0; f < nr_frags; f++)
3286                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3287                                        max_txd_pwr);
3288         if (adapter->pcix_82544)
3289                 count += nr_frags;
3290
3291
3292         if (adapter->hw.tx_pkt_filtering &&
3293             (adapter->hw.mac_type == e1000_82573))
3294                 e1000_transfer_dhcp_info(adapter, skb);
3295
3296         local_irq_save(flags);
3297         if (!spin_trylock(&tx_ring->tx_lock)) {
3298                 /* Collision - tell upper layer to requeue */
3299                 local_irq_restore(flags);
3300                 return NETDEV_TX_LOCKED;
3301         }
3302
3303         /* need: count + 2 desc gap to keep tail from touching
3304          * head, otherwise try next time */
3305         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3306                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3307                 return NETDEV_TX_BUSY;
3308         }
3309
3310         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3311                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3312                         netif_stop_queue(netdev);
3313                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3314                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3315                         return NETDEV_TX_BUSY;
3316                 }
3317         }
3318
3319         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3320                 tx_flags |= E1000_TX_FLAGS_VLAN;
3321                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3322         }
3323
3324         first = tx_ring->next_to_use;
3325
3326         tso = e1000_tso(adapter, tx_ring, skb);
3327         if (tso < 0) {
3328                 dev_kfree_skb_any(skb);
3329                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3330                 return NETDEV_TX_OK;
3331         }
3332
3333         if (likely(tso)) {
3334                 tx_ring->last_tx_tso = 1;
3335                 tx_flags |= E1000_TX_FLAGS_TSO;
3336         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3337                 tx_flags |= E1000_TX_FLAGS_CSUM;
3338
3339         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3340          * 82571 hardware supports TSO capabilities for IPv6 as well...
3341          * no longer assume, we must. */
3342         if (likely(skb->protocol == htons(ETH_P_IP)))
3343                 tx_flags |= E1000_TX_FLAGS_IPV4;
3344
3345         e1000_tx_queue(adapter, tx_ring, tx_flags,
3346                        e1000_tx_map(adapter, tx_ring, skb, first,
3347                                     max_per_txd, nr_frags, mss));
3348
3349         netdev->trans_start = jiffies;
3350
3351         /* Make sure there is space in the ring for the next send. */
3352         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3353
3354         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3355         return NETDEV_TX_OK;
3356 }
3357
3358 /**
3359  * e1000_tx_timeout - Respond to a Tx Hang
3360  * @netdev: network interface device structure
3361  **/
3362
3363 static void
3364 e1000_tx_timeout(struct net_device *netdev)
3365 {
3366         struct e1000_adapter *adapter = netdev_priv(netdev);
3367
3368         /* Do the reset outside of interrupt context */
3369         adapter->tx_timeout_count++;
3370         schedule_work(&adapter->reset_task);
3371 }
3372
3373 static void
3374 e1000_reset_task(struct work_struct *work)
3375 {
3376         struct e1000_adapter *adapter =
3377                 container_of(work, struct e1000_adapter, reset_task);
3378
3379         e1000_reinit_locked(adapter);
3380 }
3381
3382 /**
3383  * e1000_get_stats - Get System Network Statistics
3384  * @netdev: network interface device structure
3385  *
3386  * Returns the address of the device statistics structure.
3387  * The statistics are actually updated from the timer callback.
3388  **/
3389
3390 static struct net_device_stats *
3391 e1000_get_stats(struct net_device *netdev)
3392 {
3393         struct e1000_adapter *adapter = netdev_priv(netdev);
3394
3395         /* only return the current stats */
3396         return &adapter->net_stats;
3397 }
3398
3399 /**
3400  * e1000_change_mtu - Change the Maximum Transfer Unit
3401  * @netdev: network interface device structure
3402  * @new_mtu: new value for maximum frame size
3403  *
3404  * Returns 0 on success, negative on failure
3405  **/
3406
3407 static int
3408 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3409 {
3410         struct e1000_adapter *adapter = netdev_priv(netdev);
3411         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3412         uint16_t eeprom_data = 0;
3413
3414         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3415             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3416                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3417                 return -EINVAL;
3418         }
3419
3420         /* Adapter-specific max frame size limits. */
3421         switch (adapter->hw.mac_type) {
3422         case e1000_undefined ... e1000_82542_rev2_1:
3423         case e1000_ich8lan:
3424                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3425                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3426                         return -EINVAL;
3427                 }
3428                 break;
3429         case e1000_82573:
3430                 /* Jumbo Frames not supported if:
3431                  * - this is not an 82573L device
3432                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3433                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3434                                   &eeprom_data);
3435                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3436                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3437                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3438                                 DPRINTK(PROBE, ERR,
3439                                         "Jumbo Frames not supported.\n");
3440                                 return -EINVAL;
3441                         }
3442                         break;
3443                 }
3444                 /* ERT will be enabled later to enable wire speed receives */
3445
3446                 /* fall through to get support */
3447         case e1000_82571:
3448         case e1000_82572:
3449         case e1000_80003es2lan:
3450 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3451                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3452                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3453                         return -EINVAL;
3454                 }
3455                 break;
3456         default:
3457                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3458                 break;
3459         }
3460
3461         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3462          * means we reserve 2 more, this pushes us to allocate from the next
3463          * larger slab size
3464          * i.e. RXBUFFER_2048 --> size-4096 slab */
3465
3466         if (max_frame <= E1000_RXBUFFER_256)
3467                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3468         else if (max_frame <= E1000_RXBUFFER_512)
3469                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3470         else if (max_frame <= E1000_RXBUFFER_1024)
3471                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3472         else if (max_frame <= E1000_RXBUFFER_2048)
3473                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3474         else if (max_frame <= E1000_RXBUFFER_4096)
3475                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3476         else if (max_frame <= E1000_RXBUFFER_8192)
3477                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3478         else if (max_frame <= E1000_RXBUFFER_16384)
3479                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3480
3481         /* adjust allocation if LPE protects us, and we aren't using SBP */
3482         if (!adapter->hw.tbi_compatibility_on &&
3483             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3484              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3485                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3486
3487         netdev->mtu = new_mtu;
3488
3489         if (netif_running(netdev))
3490                 e1000_reinit_locked(adapter);
3491
3492         adapter->hw.max_frame_size = max_frame;
3493
3494         return 0;
3495 }
3496
3497 /**
3498  * e1000_update_stats - Update the board statistics counters
3499  * @adapter: board private structure
3500  **/
3501
3502 void
3503 e1000_update_stats(struct e1000_adapter *adapter)
3504 {
3505         struct e1000_hw *hw = &adapter->hw;
3506         struct pci_dev *pdev = adapter->pdev;
3507         unsigned long flags;
3508         uint16_t phy_tmp;
3509
3510 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3511
3512         /*
3513          * Prevent stats update while adapter is being reset, or if the pci
3514          * connection is down.
3515          */
3516         if (adapter->link_speed == 0)
3517                 return;
3518         if (pdev->error_state && pdev->error_state != pci_channel_io_normal)
3519                 return;
3520
3521         spin_lock_irqsave(&adapter->stats_lock, flags);
3522
3523         /* these counters are modified from e1000_adjust_tbi_stats,
3524          * called from the interrupt context, so they must only
3525          * be written while holding adapter->stats_lock
3526          */
3527
3528         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3529         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3530         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3531         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3532         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3533         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3534         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3535
3536         if (adapter->hw.mac_type != e1000_ich8lan) {
3537                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3538                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3539                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3540                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3541                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3542                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3543         }
3544
3545         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3546         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3547         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3548         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3549         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3550         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3551         adapter->stats.dc += E1000_READ_REG(hw, DC);
3552         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3553         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3554         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3555         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3556         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3557         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3558         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3559         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3560         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3561         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3562         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3563         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3564         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3565         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3566         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3567         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3568         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3569         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3570         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3571
3572         if (adapter->hw.mac_type != e1000_ich8lan) {
3573                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3574                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3575                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3576                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3577                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3578                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3579         }
3580
3581         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3582         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3583
3584         /* used for adaptive IFS */
3585
3586         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3587         adapter->stats.tpt += hw->tx_packet_delta;
3588         hw->collision_delta = E1000_READ_REG(hw, COLC);
3589         adapter->stats.colc += hw->collision_delta;
3590
3591         if (hw->mac_type >= e1000_82543) {
3592                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3593                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3594                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3595                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3596                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3597                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3598         }
3599         if (hw->mac_type > e1000_82547_rev_2) {
3600                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3601                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3602
3603                 if (adapter->hw.mac_type != e1000_ich8lan) {
3604                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3605                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3606                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3607                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3608                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3609                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3610                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3611                 }
3612         }
3613
3614         /* Fill out the OS statistics structure */
3615         adapter->net_stats.rx_packets = adapter->stats.gprc;
3616         adapter->net_stats.tx_packets = adapter->stats.gptc;
3617         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3618         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3619         adapter->net_stats.multicast = adapter->stats.mprc;
3620         adapter->net_stats.collisions = adapter->stats.colc;
3621
3622         /* Rx Errors */
3623
3624         /* RLEC on some newer hardware can be incorrect so build
3625         * our own version based on RUC and ROC */
3626         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3627                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3628                 adapter->stats.ruc + adapter->stats.roc +
3629                 adapter->stats.cexterr;
3630         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3631         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3632         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3633         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3634         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3635
3636         /* Tx Errors */
3637         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3638         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3639         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3640         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3641         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3642         if (adapter->hw.bad_tx_carr_stats_fd &&
3643             adapter->link_duplex == FULL_DUPLEX) {
3644                 adapter->net_stats.tx_carrier_errors = 0;
3645                 adapter->stats.tncrs = 0;
3646         }
3647
3648         /* Tx Dropped needs to be maintained elsewhere */
3649
3650         /* Phy Stats */
3651         if (hw->media_type == e1000_media_type_copper) {
3652                 if ((adapter->link_speed == SPEED_1000) &&
3653                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3654                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3655                         adapter->phy_stats.idle_errors += phy_tmp;
3656                 }
3657
3658                 if ((hw->mac_type <= e1000_82546) &&
3659                    (hw->phy_type == e1000_phy_m88) &&
3660                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3661                         adapter->phy_stats.receive_errors += phy_tmp;
3662         }
3663
3664         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3665 }
3666 #ifdef CONFIG_PCI_MSI
3667
3668 /**
3669  * e1000_intr_msi - Interrupt Handler
3670  * @irq: interrupt number
3671  * @data: pointer to a network interface device structure
3672  **/
3673
3674 static
3675 irqreturn_t e1000_intr_msi(int irq, void *data)
3676 {
3677         struct net_device *netdev = data;
3678         struct e1000_adapter *adapter = netdev_priv(netdev);
3679         struct e1000_hw *hw = &adapter->hw;
3680 #ifndef CONFIG_E1000_NAPI
3681         int i;
3682 #endif
3683
3684         /* this code avoids the read of ICR but has to get 1000 interrupts
3685          * at every link change event before it will notice the change */
3686         if (++adapter->detect_link >= 1000) {
3687                 uint32_t icr = E1000_READ_REG(hw, ICR);
3688 #ifdef CONFIG_E1000_NAPI
3689                 /* read ICR disables interrupts using IAM, so keep up with our
3690                  * enable/disable accounting */
3691                 atomic_inc(&adapter->irq_sem);
3692 #endif
3693                 adapter->detect_link = 0;
3694                 if ((icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) &&
3695                     (icr & E1000_ICR_INT_ASSERTED)) {
3696                         hw->get_link_status = 1;
3697                         /* 80003ES2LAN workaround--
3698                         * For packet buffer work-around on link down event;
3699                         * disable receives here in the ISR and
3700                         * reset adapter in watchdog
3701                         */
3702                         if (netif_carrier_ok(netdev) &&
3703                             (adapter->hw.mac_type == e1000_80003es2lan)) {
3704                                 /* disable receives */
3705                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
3706                                 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3707                         }
3708                         /* guard against interrupt when we're going down */
3709                         if (!test_bit(__E1000_DOWN, &adapter->flags))
3710                                 mod_timer(&adapter->watchdog_timer,
3711                                           jiffies + 1);
3712                 }
3713         } else {
3714                 E1000_WRITE_REG(hw, ICR, (0xffffffff & ~(E1000_ICR_RXSEQ |
3715                                                          E1000_ICR_LSC)));
3716                 /* bummer we have to flush here, but things break otherwise as
3717                  * some event appears to be lost or delayed and throughput
3718                  * drops.  In almost all tests this flush is un-necessary */
3719                 E1000_WRITE_FLUSH(hw);
3720 #ifdef CONFIG_E1000_NAPI
3721                 /* Interrupt Auto-Mask (IAM)...upon writing ICR, interrupts are
3722                  * masked.  No need for the IMC write, but it does mean we
3723                  * should account for it ASAP. */
3724                 atomic_inc(&adapter->irq_sem);
3725 #endif
3726         }
3727
3728 #ifdef CONFIG_E1000_NAPI
3729         if (likely(netif_rx_schedule_prep(netdev))) {
3730                 adapter->total_tx_bytes = 0;
3731                 adapter->total_tx_packets = 0;
3732                 adapter->total_rx_bytes = 0;
3733                 adapter->total_rx_packets = 0;
3734                 __netif_rx_schedule(netdev);
3735         } else
3736                 e1000_irq_enable(adapter);
3737 #else
3738         adapter->total_tx_bytes = 0;
3739         adapter->total_rx_bytes = 0;
3740         adapter->total_tx_packets = 0;
3741         adapter->total_rx_packets = 0;
3742
3743         for (i = 0; i < E1000_MAX_INTR; i++)
3744                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3745                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3746                         break;
3747
3748         if (likely(adapter->itr_setting & 3))
3749                 e1000_set_itr(adapter);
3750 #endif
3751
3752         return IRQ_HANDLED;
3753 }
3754 #endif
3755
3756 /**
3757  * e1000_intr - Interrupt Handler
3758  * @irq: interrupt number
3759  * @data: pointer to a network interface device structure
3760  **/
3761
3762 static irqreturn_t
3763 e1000_intr(int irq, void *data)
3764 {
3765         struct net_device *netdev = data;
3766         struct e1000_adapter *adapter = netdev_priv(netdev);
3767         struct e1000_hw *hw = &adapter->hw;
3768         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3769 #ifndef CONFIG_E1000_NAPI
3770         int i;
3771 #endif
3772         if (unlikely(!icr))
3773                 return IRQ_NONE;  /* Not our interrupt */
3774
3775 #ifdef CONFIG_E1000_NAPI
3776         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3777          * not set, then the adapter didn't send an interrupt */
3778         if (unlikely(hw->mac_type >= e1000_82571 &&
3779                      !(icr & E1000_ICR_INT_ASSERTED)))
3780                 return IRQ_NONE;
3781
3782         /* Interrupt Auto-Mask...upon reading ICR,
3783          * interrupts are masked.  No need for the
3784          * IMC write, but it does mean we should
3785          * account for it ASAP. */
3786         if (likely(hw->mac_type >= e1000_82571))
3787                 atomic_inc(&adapter->irq_sem);
3788 #endif
3789
3790         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3791                 hw->get_link_status = 1;
3792                 /* 80003ES2LAN workaround--
3793                  * For packet buffer work-around on link down event;
3794                  * disable receives here in the ISR and
3795                  * reset adapter in watchdog
3796                  */
3797                 if (netif_carrier_ok(netdev) &&
3798                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3799                         /* disable receives */
3800                         rctl = E1000_READ_REG(hw, RCTL);
3801                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3802                 }
3803                 /* guard against interrupt when we're going down */
3804                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3805                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3806         }
3807
3808 #ifdef CONFIG_E1000_NAPI
3809         if (unlikely(hw->mac_type < e1000_82571)) {
3810                 /* disable interrupts, without the synchronize_irq bit */
3811                 atomic_inc(&adapter->irq_sem);
3812                 E1000_WRITE_REG(hw, IMC, ~0);
3813                 E1000_WRITE_FLUSH(hw);
3814         }
3815         if (likely(netif_rx_schedule_prep(netdev))) {
3816                 adapter->total_tx_bytes = 0;
3817                 adapter->total_tx_packets = 0;
3818                 adapter->total_rx_bytes = 0;
3819                 adapter->total_rx_packets = 0;
3820                 __netif_rx_schedule(netdev);
3821         } else
3822                 /* this really should not happen! if it does it is basically a
3823                  * bug, but not a hard error, so enable ints and continue */
3824                 e1000_irq_enable(adapter);
3825 #else
3826         /* Writing IMC and IMS is needed for 82547.
3827          * Due to Hub Link bus being occupied, an interrupt
3828          * de-assertion message is not able to be sent.
3829          * When an interrupt assertion message is generated later,
3830          * two messages are re-ordered and sent out.
3831          * That causes APIC to think 82547 is in de-assertion
3832          * state, while 82547 is in assertion state, resulting
3833          * in dead lock. Writing IMC forces 82547 into
3834          * de-assertion state.
3835          */
3836         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3837                 atomic_inc(&adapter->irq_sem);
3838                 E1000_WRITE_REG(hw, IMC, ~0);
3839         }
3840
3841         adapter->total_tx_bytes = 0;
3842         adapter->total_rx_bytes = 0;
3843         adapter->total_tx_packets = 0;
3844         adapter->total_rx_packets = 0;
3845
3846         for (i = 0; i < E1000_MAX_INTR; i++)
3847                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3848                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3849                         break;
3850
3851         if (likely(adapter->itr_setting & 3))
3852                 e1000_set_itr(adapter);
3853
3854         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3855                 e1000_irq_enable(adapter);
3856
3857 #endif
3858         return IRQ_HANDLED;
3859 }
3860
3861 #ifdef CONFIG_E1000_NAPI
3862 /**
3863  * e1000_clean - NAPI Rx polling callback
3864  * @adapter: board private structure
3865  **/
3866
3867 static int
3868 e1000_clean(struct net_device *poll_dev, int *budget)
3869 {
3870         struct e1000_adapter *adapter;
3871         int work_to_do = min(*budget, poll_dev->quota);
3872         int tx_cleaned = 0, work_done = 0;
3873
3874         /* Must NOT use netdev_priv macro here. */
3875         adapter = poll_dev->priv;
3876
3877         /* Keep link state information with original netdev */
3878         if (!netif_carrier_ok(poll_dev))
3879                 goto quit_polling;
3880
3881         /* e1000_clean is called per-cpu.  This lock protects
3882          * tx_ring[0] from being cleaned by multiple cpus
3883          * simultaneously.  A failure obtaining the lock means
3884          * tx_ring[0] is currently being cleaned anyway. */
3885         if (spin_trylock(&adapter->tx_queue_lock)) {
3886                 tx_cleaned = e1000_clean_tx_irq(adapter,
3887                                                 &adapter->tx_ring[0]);
3888                 spin_unlock(&adapter->tx_queue_lock);
3889         }
3890
3891         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3892                           &work_done, work_to_do);
3893
3894         *budget -= work_done;
3895         poll_dev->quota -= work_done;
3896
3897         /* If no Tx and not enough Rx work done, exit the polling mode */
3898         if ((!tx_cleaned && (work_done == 0)) ||
3899            !netif_running(poll_dev)) {
3900 quit_polling:
3901                 if (likely(adapter->itr_setting & 3))
3902                         e1000_set_itr(adapter);
3903                 netif_rx_complete(poll_dev);
3904                 e1000_irq_enable(adapter);
3905                 return 0;
3906         }
3907
3908         return 1;
3909 }
3910
3911 #endif
3912 /**
3913  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3914  * @adapter: board private structure
3915  **/
3916
3917 static boolean_t
3918 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3919                    struct e1000_tx_ring *tx_ring)
3920 {
3921         struct net_device *netdev = adapter->netdev;
3922         struct e1000_tx_desc *tx_desc, *eop_desc;
3923         struct e1000_buffer *buffer_info;
3924         unsigned int i, eop;
3925 #ifdef CONFIG_E1000_NAPI
3926         unsigned int count = 0;
3927 #endif
3928         boolean_t cleaned = FALSE;
3929         unsigned int total_tx_bytes=0, total_tx_packets=0;
3930
3931         i = tx_ring->next_to_clean;
3932         eop = tx_ring->buffer_info[i].next_to_watch;
3933         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3934
3935         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3936                 for (cleaned = FALSE; !cleaned; ) {
3937                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3938                         buffer_info = &tx_ring->buffer_info[i];
3939                         cleaned = (i == eop);
3940
3941                         if (cleaned) {
3942                                 struct sk_buff *skb = buffer_info->skb;
3943                                 unsigned int segs = skb_shinfo(skb)->gso_segs;
3944                                 total_tx_packets += segs;
3945                                 total_tx_packets++;
3946                                 total_tx_bytes += skb->len;
3947                         }
3948                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3949                         tx_desc->upper.data = 0;
3950
3951                         if (unlikely(++i == tx_ring->count)) i = 0;
3952                 }
3953
3954                 eop = tx_ring->buffer_info[i].next_to_watch;
3955                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3956 #ifdef CONFIG_E1000_NAPI
3957 #define E1000_TX_WEIGHT 64
3958                 /* weight of a sort for tx, to avoid endless transmit cleanup */
3959                 if (count++ == E1000_TX_WEIGHT) break;
3960 #endif
3961         }
3962
3963         tx_ring->next_to_clean = i;
3964
3965 #define TX_WAKE_THRESHOLD 32
3966         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3967                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3968                 /* Make sure that anybody stopping the queue after this
3969                  * sees the new next_to_clean.
3970                  */
3971                 smp_mb();
3972                 if (netif_queue_stopped(netdev)) {
3973                         netif_wake_queue(netdev);
3974                         ++adapter->restart_queue;
3975                 }
3976         }
3977
3978         if (adapter->detect_tx_hung) {
3979                 /* Detect a transmit hang in hardware, this serializes the
3980                  * check with the clearing of time_stamp and movement of i */
3981                 adapter->detect_tx_hung = FALSE;
3982                 if (tx_ring->buffer_info[eop].dma &&
3983                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3984                                (adapter->tx_timeout_factor * HZ))
3985                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3986                          E1000_STATUS_TXOFF)) {
3987
3988                         /* detected Tx unit hang */
3989                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3990                                         "  Tx Queue             <%lu>\n"
3991                                         "  TDH                  <%x>\n"
3992                                         "  TDT                  <%x>\n"
3993                                         "  next_to_use          <%x>\n"
3994                                         "  next_to_clean        <%x>\n"
3995                                         "buffer_info[next_to_clean]\n"
3996                                         "  time_stamp           <%lx>\n"
3997                                         "  next_to_watch        <%x>\n"
3998                                         "  jiffies              <%lx>\n"
3999                                         "  next_to_watch.status <%x>\n",
4000                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4001                                         sizeof(struct e1000_tx_ring)),
4002                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4003                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4004                                 tx_ring->next_to_use,
4005                                 tx_ring->next_to_clean,
4006                                 tx_ring->buffer_info[eop].time_stamp,
4007                                 eop,
4008                                 jiffies,
4009                                 eop_desc->upper.fields.status);
4010                         netif_stop_queue(netdev);
4011                 }
4012         }
4013         adapter->total_tx_bytes += total_tx_bytes;
4014         adapter->total_tx_packets += total_tx_packets;
4015         return cleaned;
4016 }
4017
4018 /**
4019  * e1000_rx_checksum - Receive Checksum Offload for 82543
4020  * @adapter:     board private structure
4021  * @status_err:  receive descriptor status and error fields
4022  * @csum:        receive descriptor csum field
4023  * @sk_buff:     socket buffer with received data
4024  **/
4025
4026 static void
4027 e1000_rx_checksum(struct e1000_adapter *adapter,
4028                   uint32_t status_err, uint32_t csum,
4029                   struct sk_buff *skb)
4030 {
4031         uint16_t status = (uint16_t)status_err;
4032         uint8_t errors = (uint8_t)(status_err >> 24);
4033         skb->ip_summed = CHECKSUM_NONE;
4034
4035         /* 82543 or newer only */
4036         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4037         /* Ignore Checksum bit is set */
4038         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4039         /* TCP/UDP checksum error bit is set */
4040         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4041                 /* let the stack verify checksum errors */
4042                 adapter->hw_csum_err++;
4043                 return;
4044         }
4045         /* TCP/UDP Checksum has not been calculated */
4046         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4047                 if (!(status & E1000_RXD_STAT_TCPCS))
4048                         return;
4049         } else {
4050                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4051                         return;
4052         }
4053         /* It must be a TCP or UDP packet with a valid checksum */
4054         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4055                 /* TCP checksum is good */
4056                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4057         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4058                 /* IP fragment with UDP payload */
4059                 /* Hardware complements the payload checksum, so we undo it
4060                  * and then put the value in host order for further stack use.
4061                  */
4062                 csum = ntohl(csum ^ 0xFFFF);
4063                 skb->csum = csum;
4064                 skb->ip_summed = CHECKSUM_COMPLETE;
4065         }
4066         adapter->hw_csum_good++;
4067 }
4068
4069 /**
4070  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4071  * @adapter: board private structure
4072  **/
4073
4074 static boolean_t
4075 #ifdef CONFIG_E1000_NAPI
4076 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4077                    struct e1000_rx_ring *rx_ring,
4078                    int *work_done, int work_to_do)
4079 #else
4080 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4081                    struct e1000_rx_ring *rx_ring)
4082 #endif
4083 {
4084         struct net_device *netdev = adapter->netdev;
4085         struct pci_dev *pdev = adapter->pdev;
4086         struct e1000_rx_desc *rx_desc, *next_rxd;
4087         struct e1000_buffer *buffer_info, *next_buffer;
4088         unsigned long flags;
4089         uint32_t length;
4090         uint8_t last_byte;
4091         unsigned int i;
4092         int cleaned_count = 0;
4093         boolean_t cleaned = FALSE;
4094         unsigned int total_rx_bytes=0, total_rx_packets=0;
4095
4096         i = rx_ring->next_to_clean;
4097         rx_desc = E1000_RX_DESC(*rx_ring, i);
4098         buffer_info = &rx_ring->buffer_info[i];
4099
4100         while (rx_desc->status & E1000_RXD_STAT_DD) {
4101                 struct sk_buff *skb;
4102                 u8 status;
4103
4104 #ifdef CONFIG_E1000_NAPI
4105                 if (*work_done >= work_to_do)
4106                         break;
4107                 (*work_done)++;
4108 #endif
4109                 status = rx_desc->status;
4110                 skb = buffer_info->skb;
4111                 buffer_info->skb = NULL;
4112
4113                 prefetch(skb->data - NET_IP_ALIGN);
4114
4115                 if (++i == rx_ring->count) i = 0;
4116                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4117                 prefetch(next_rxd);
4118
4119                 next_buffer = &rx_ring->buffer_info[i];
4120
4121                 cleaned = TRUE;
4122                 cleaned_count++;
4123                 pci_unmap_single(pdev,
4124                                  buffer_info->dma,
4125                                  buffer_info->length,
4126                                  PCI_DMA_FROMDEVICE);
4127
4128                 length = le16_to_cpu(rx_desc->length);
4129
4130                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4131                         /* All receives must fit into a single buffer */
4132                         E1000_DBG("%s: Receive packet consumed multiple"
4133                                   " buffers\n", netdev->name);
4134                         /* recycle */
4135                         buffer_info->skb = skb;
4136                         goto next_desc;
4137                 }
4138
4139                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4140                         last_byte = *(skb->data + length - 1);
4141                         if (TBI_ACCEPT(&adapter->hw, status,
4142                                       rx_desc->errors, length, last_byte)) {
4143                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4144                                 e1000_tbi_adjust_stats(&adapter->hw,
4145                                                        &adapter->stats,
4146                                                        length, skb->data);
4147                                 spin_unlock_irqrestore(&adapter->stats_lock,
4148                                                        flags);
4149                                 length--;
4150                         } else {
4151                                 /* recycle */
4152                                 buffer_info->skb = skb;
4153                                 goto next_desc;
4154                         }
4155                 }
4156
4157                 /* adjust length to remove Ethernet CRC, this must be
4158                  * done after the TBI_ACCEPT workaround above */
4159                 length -= 4;
4160
4161                 /* probably a little skewed due to removing CRC */
4162                 total_rx_bytes += length;
4163                 total_rx_packets++;
4164
4165                 /* code added for copybreak, this should improve
4166                  * performance for small packets with large amounts
4167                  * of reassembly being done in the stack */
4168 #define E1000_CB_LENGTH 256
4169                 if (length < E1000_CB_LENGTH) {
4170                         struct sk_buff *new_skb =
4171                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4172                         if (new_skb) {
4173                                 skb_reserve(new_skb, NET_IP_ALIGN);
4174                                 memcpy(new_skb->data - NET_IP_ALIGN,
4175                                        skb->data - NET_IP_ALIGN,
4176                                        length + NET_IP_ALIGN);
4177                                 /* save the skb in buffer_info as good */
4178                                 buffer_info->skb = skb;
4179                                 skb = new_skb;
4180                         }
4181                         /* else just continue with the old one */
4182                 }
4183                 /* end copybreak code */
4184                 skb_put(skb, length);
4185
4186                 /* Receive Checksum Offload */
4187                 e1000_rx_checksum(adapter,
4188                                   (uint32_t)(status) |
4189                                   ((uint32_t)(rx_desc->errors) << 24),
4190                                   le16_to_cpu(rx_desc->csum), skb);
4191
4192                 skb->protocol = eth_type_trans(skb, netdev);
4193 #ifdef CONFIG_E1000_NAPI
4194                 if (unlikely(adapter->vlgrp &&
4195                             (status & E1000_RXD_STAT_VP))) {
4196                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4197                                                  le16_to_cpu(rx_desc->special) &
4198                                                  E1000_RXD_SPC_VLAN_MASK);
4199                 } else {
4200                         netif_receive_skb(skb);
4201                 }
4202 #else /* CONFIG_E1000_NAPI */
4203                 if (unlikely(adapter->vlgrp &&
4204                             (status & E1000_RXD_STAT_VP))) {
4205                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4206                                         le16_to_cpu(rx_desc->special) &
4207                                         E1000_RXD_SPC_VLAN_MASK);
4208                 } else {
4209                         netif_rx(skb);
4210                 }
4211 #endif /* CONFIG_E1000_NAPI */
4212                 netdev->last_rx = jiffies;
4213
4214 next_desc:
4215                 rx_desc->status = 0;
4216
4217                 /* return some buffers to hardware, one at a time is too slow */
4218                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4219                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4220                         cleaned_count = 0;
4221                 }
4222
4223                 /* use prefetched values */
4224                 rx_desc = next_rxd;
4225                 buffer_info = next_buffer;
4226         }
4227         rx_ring->next_to_clean = i;
4228
4229         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4230         if (cleaned_count)
4231                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4232
4233         adapter->total_rx_packets += total_rx_packets;
4234         adapter->total_rx_bytes += total_rx_bytes;
4235         return cleaned;
4236 }
4237
4238 /**
4239  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4240  * @adapter: board private structure
4241  **/
4242
4243 static boolean_t
4244 #ifdef CONFIG_E1000_NAPI
4245 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4246                       struct e1000_rx_ring *rx_ring,
4247                       int *work_done, int work_to_do)
4248 #else
4249 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4250                       struct e1000_rx_ring *rx_ring)
4251 #endif
4252 {
4253         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4254         struct net_device *netdev = adapter->netdev;
4255         struct pci_dev *pdev = adapter->pdev;
4256         struct e1000_buffer *buffer_info, *next_buffer;
4257         struct e1000_ps_page *ps_page;
4258         struct e1000_ps_page_dma *ps_page_dma;
4259         struct sk_buff *skb;
4260         unsigned int i, j;
4261         uint32_t length, staterr;
4262         int cleaned_count = 0;
4263         boolean_t cleaned = FALSE;
4264         unsigned int total_rx_bytes=0, total_rx_packets=0;
4265
4266         i = rx_ring->next_to_clean;
4267         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4268         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4269         buffer_info = &rx_ring->buffer_info[i];
4270
4271         while (staterr & E1000_RXD_STAT_DD) {
4272                 ps_page = &rx_ring->ps_page[i];
4273                 ps_page_dma = &rx_ring->ps_page_dma[i];
4274 #ifdef CONFIG_E1000_NAPI
4275                 if (unlikely(*work_done >= work_to_do))
4276                         break;
4277                 (*work_done)++;
4278 #endif
4279                 skb = buffer_info->skb;
4280
4281                 /* in the packet split case this is header only */
4282                 prefetch(skb->data - NET_IP_ALIGN);
4283
4284                 if (++i == rx_ring->count) i = 0;
4285                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4286                 prefetch(next_rxd);
4287
4288                 next_buffer = &rx_ring->buffer_info[i];
4289
4290                 cleaned = TRUE;
4291                 cleaned_count++;
4292                 pci_unmap_single(pdev, buffer_info->dma,
4293                                  buffer_info->length,
4294                                  PCI_DMA_FROMDEVICE);
4295
4296                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4297                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4298                                   " the full packet\n", netdev->name);
4299                         dev_kfree_skb_irq(skb);
4300                         goto next_desc;
4301                 }
4302
4303                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4304                         dev_kfree_skb_irq(skb);
4305                         goto next_desc;
4306                 }
4307
4308                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4309
4310                 if (unlikely(!length)) {
4311                         E1000_DBG("%s: Last part of the packet spanning"
4312                                   " multiple descriptors\n", netdev->name);
4313                         dev_kfree_skb_irq(skb);
4314                         goto next_desc;
4315                 }
4316
4317                 /* Good Receive */
4318                 skb_put(skb, length);
4319
4320                 {
4321                 /* this looks ugly, but it seems compiler issues make it
4322                    more efficient than reusing j */
4323                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4324
4325                 /* page alloc/put takes too long and effects small packet
4326                  * throughput, so unsplit small packets and save the alloc/put*/
4327                 if (l1 && ((length + l1) <= adapter->rx_ps_bsize0)) {
4328                         u8 *vaddr;
4329                         /* there is no documentation about how to call
4330                          * kmap_atomic, so we can't hold the mapping
4331                          * very long */
4332                         pci_dma_sync_single_for_cpu(pdev,
4333                                 ps_page_dma->ps_page_dma[0],
4334                                 PAGE_SIZE,
4335                                 PCI_DMA_FROMDEVICE);
4336                         vaddr = kmap_atomic(ps_page->ps_page[0],
4337                                             KM_SKB_DATA_SOFTIRQ);
4338                         memcpy(skb->tail, vaddr, l1);
4339                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4340                         pci_dma_sync_single_for_device(pdev,
4341                                 ps_page_dma->ps_page_dma[0],
4342                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4343                         /* remove the CRC */
4344                         l1 -= 4;
4345                         skb_put(skb, l1);
4346                         goto copydone;
4347                 } /* if */
4348                 }
4349
4350                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4351                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4352                                 break;
4353                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4354                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4355                         ps_page_dma->ps_page_dma[j] = 0;
4356                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4357                                            length);
4358                         ps_page->ps_page[j] = NULL;
4359                         skb->len += length;
4360                         skb->data_len += length;
4361                         skb->truesize += length;
4362                 }
4363
4364                 /* strip the ethernet crc, problem is we're using pages now so
4365                  * this whole operation can get a little cpu intensive */
4366                 pskb_trim(skb, skb->len - 4);
4367
4368 copydone:
4369                 total_rx_bytes += skb->len;
4370                 total_rx_packets++;
4371
4372                 e1000_rx_checksum(adapter, staterr,
4373                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4374                 skb->protocol = eth_type_trans(skb, netdev);
4375
4376                 if (likely(rx_desc->wb.upper.header_status &
4377                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4378                         adapter->rx_hdr_split++;
4379 #ifdef CONFIG_E1000_NAPI
4380                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4381                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4382                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4383                                 E1000_RXD_SPC_VLAN_MASK);
4384                 } else {
4385                         netif_receive_skb(skb);
4386                 }
4387 #else /* CONFIG_E1000_NAPI */
4388                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4389                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4390                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4391                                 E1000_RXD_SPC_VLAN_MASK);
4392                 } else {
4393                         netif_rx(skb);
4394                 }
4395 #endif /* CONFIG_E1000_NAPI */
4396                 netdev->last_rx = jiffies;
4397
4398 next_desc:
4399                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4400                 buffer_info->skb = NULL;
4401
4402                 /* return some buffers to hardware, one at a time is too slow */
4403                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4404                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4405                         cleaned_count = 0;
4406                 }
4407
4408                 /* use prefetched values */
4409                 rx_desc = next_rxd;
4410                 buffer_info = next_buffer;
4411
4412                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4413         }
4414         rx_ring->next_to_clean = i;
4415
4416         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4417         if (cleaned_count)
4418                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4419
4420         adapter->total_rx_packets += total_rx_packets;
4421         adapter->total_rx_bytes += total_rx_bytes;
4422         return cleaned;
4423 }
4424
4425 /**
4426  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4427  * @adapter: address of board private structure
4428  **/
4429
4430 static void
4431 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4432                        struct e1000_rx_ring *rx_ring,
4433                        int cleaned_count)
4434 {
4435         struct net_device *netdev = adapter->netdev;
4436         struct pci_dev *pdev = adapter->pdev;
4437         struct e1000_rx_desc *rx_desc;
4438         struct e1000_buffer *buffer_info;
4439         struct sk_buff *skb;
4440         unsigned int i;
4441         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4442
4443         i = rx_ring->next_to_use;
4444         buffer_info = &rx_ring->buffer_info[i];
4445
4446         while (cleaned_count--) {
4447                 skb = buffer_info->skb;
4448                 if (skb) {
4449                         skb_trim(skb, 0);
4450                         goto map_skb;
4451                 }
4452
4453                 skb = netdev_alloc_skb(netdev, bufsz);
4454                 if (unlikely(!skb)) {
4455                         /* Better luck next round */
4456                         adapter->alloc_rx_buff_failed++;
4457                         break;
4458                 }
4459
4460                 /* Fix for errata 23, can't cross 64kB boundary */
4461                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4462                         struct sk_buff *oldskb = skb;
4463                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4464                                              "at %p\n", bufsz, skb->data);
4465                         /* Try again, without freeing the previous */
4466                         skb = netdev_alloc_skb(netdev, bufsz);
4467                         /* Failed allocation, critical failure */
4468                         if (!skb) {
4469                                 dev_kfree_skb(oldskb);
4470                                 break;
4471                         }
4472
4473                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4474                                 /* give up */
4475                                 dev_kfree_skb(skb);
4476                                 dev_kfree_skb(oldskb);
4477                                 break; /* while !buffer_info->skb */
4478                         }
4479
4480                         /* Use new allocation */
4481                         dev_kfree_skb(oldskb);
4482                 }
4483                 /* Make buffer alignment 2 beyond a 16 byte boundary
4484                  * this will result in a 16 byte aligned IP header after
4485                  * the 14 byte MAC header is removed
4486                  */
4487                 skb_reserve(skb, NET_IP_ALIGN);
4488
4489                 buffer_info->skb = skb;
4490                 buffer_info->length = adapter->rx_buffer_len;
4491 map_skb:
4492                 buffer_info->dma = pci_map_single(pdev,
4493                                                   skb->data,
4494                                                   adapter->rx_buffer_len,
4495                                                   PCI_DMA_FROMDEVICE);
4496
4497                 /* Fix for errata 23, can't cross 64kB boundary */
4498                 if (!e1000_check_64k_bound(adapter,
4499                                         (void *)(unsigned long)buffer_info->dma,
4500                                         adapter->rx_buffer_len)) {
4501                         DPRINTK(RX_ERR, ERR,
4502                                 "dma align check failed: %u bytes at %p\n",
4503                                 adapter->rx_buffer_len,
4504                                 (void *)(unsigned long)buffer_info->dma);
4505                         dev_kfree_skb(skb);
4506                         buffer_info->skb = NULL;
4507
4508                         pci_unmap_single(pdev, buffer_info->dma,
4509                                          adapter->rx_buffer_len,
4510                                          PCI_DMA_FROMDEVICE);
4511
4512                         break; /* while !buffer_info->skb */
4513                 }
4514                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4515                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4516
4517                 if (unlikely(++i == rx_ring->count))
4518                         i = 0;
4519                 buffer_info = &rx_ring->buffer_info[i];
4520         }
4521
4522         if (likely(rx_ring->next_to_use != i)) {
4523                 rx_ring->next_to_use = i;
4524                 if (unlikely(i-- == 0))
4525                         i = (rx_ring->count - 1);
4526
4527                 /* Force memory writes to complete before letting h/w
4528                  * know there are new descriptors to fetch.  (Only
4529                  * applicable for weak-ordered memory model archs,
4530                  * such as IA-64). */
4531                 wmb();
4532                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4533         }
4534 }
4535
4536 /**
4537  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4538  * @adapter: address of board private structure
4539  **/
4540
4541 static void
4542 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4543                           struct e1000_rx_ring *rx_ring,
4544                           int cleaned_count)
4545 {
4546         struct net_device *netdev = adapter->netdev;
4547         struct pci_dev *pdev = adapter->pdev;
4548         union e1000_rx_desc_packet_split *rx_desc;
4549         struct e1000_buffer *buffer_info;
4550         struct e1000_ps_page *ps_page;
4551         struct e1000_ps_page_dma *ps_page_dma;
4552         struct sk_buff *skb;
4553         unsigned int i, j;
4554
4555         i = rx_ring->next_to_use;
4556         buffer_info = &rx_ring->buffer_info[i];
4557         ps_page = &rx_ring->ps_page[i];
4558         ps_page_dma = &rx_ring->ps_page_dma[i];
4559
4560         while (cleaned_count--) {
4561                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4562
4563                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4564                         if (j < adapter->rx_ps_pages) {
4565                                 if (likely(!ps_page->ps_page[j])) {
4566                                         ps_page->ps_page[j] =
4567                                                 alloc_page(GFP_ATOMIC);
4568                                         if (unlikely(!ps_page->ps_page[j])) {
4569                                                 adapter->alloc_rx_buff_failed++;
4570                                                 goto no_buffers;
4571                                         }
4572                                         ps_page_dma->ps_page_dma[j] =
4573                                                 pci_map_page(pdev,
4574                                                             ps_page->ps_page[j],
4575                                                             0, PAGE_SIZE,
4576                                                             PCI_DMA_FROMDEVICE);
4577                                 }
4578                                 /* Refresh the desc even if buffer_addrs didn't
4579                                  * change because each write-back erases
4580                                  * this info.
4581                                  */
4582                                 rx_desc->read.buffer_addr[j+1] =
4583                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4584                         } else
4585                                 rx_desc->read.buffer_addr[j+1] = ~0;
4586                 }
4587
4588                 skb = netdev_alloc_skb(netdev,
4589                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4590
4591                 if (unlikely(!skb)) {
4592                         adapter->alloc_rx_buff_failed++;
4593                         break;
4594                 }
4595
4596                 /* Make buffer alignment 2 beyond a 16 byte boundary
4597                  * this will result in a 16 byte aligned IP header after
4598                  * the 14 byte MAC header is removed
4599                  */
4600                 skb_reserve(skb, NET_IP_ALIGN);
4601
4602                 buffer_info->skb = skb;
4603                 buffer_info->length = adapter->rx_ps_bsize0;
4604                 buffer_info->dma = pci_map_single(pdev, skb->data,
4605                                                   adapter->rx_ps_bsize0,
4606                                                   PCI_DMA_FROMDEVICE);
4607
4608                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4609
4610                 if (unlikely(++i == rx_ring->count)) i = 0;
4611                 buffer_info = &rx_ring->buffer_info[i];
4612                 ps_page = &rx_ring->ps_page[i];
4613                 ps_page_dma = &rx_ring->ps_page_dma[i];
4614         }
4615
4616 no_buffers:
4617         if (likely(rx_ring->next_to_use != i)) {
4618                 rx_ring->next_to_use = i;
4619                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4620
4621                 /* Force memory writes to complete before letting h/w
4622                  * know there are new descriptors to fetch.  (Only
4623                  * applicable for weak-ordered memory model archs,
4624                  * such as IA-64). */
4625                 wmb();
4626                 /* Hardware increments by 16 bytes, but packet split
4627                  * descriptors are 32 bytes...so we increment tail
4628                  * twice as much.
4629                  */
4630                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4631         }
4632 }
4633
4634 /**
4635  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4636  * @adapter:
4637  **/
4638
4639 static void
4640 e1000_smartspeed(struct e1000_adapter *adapter)
4641 {
4642         uint16_t phy_status;
4643         uint16_t phy_ctrl;
4644
4645         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4646            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4647                 return;
4648
4649         if (adapter->smartspeed == 0) {
4650                 /* If Master/Slave config fault is asserted twice,
4651                  * we assume back-to-back */
4652                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4653                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4654                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4655                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4656                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4657                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4658                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4659                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4660                                             phy_ctrl);
4661                         adapter->smartspeed++;
4662                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4663                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4664                                                &phy_ctrl)) {
4665                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4666                                              MII_CR_RESTART_AUTO_NEG);
4667                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4668                                                     phy_ctrl);
4669                         }
4670                 }
4671                 return;
4672         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4673                 /* If still no link, perhaps using 2/3 pair cable */
4674                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4675                 phy_ctrl |= CR_1000T_MS_ENABLE;
4676                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4677                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4678                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4679                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4680                                      MII_CR_RESTART_AUTO_NEG);
4681                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4682                 }
4683         }
4684         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4685         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4686                 adapter->smartspeed = 0;
4687 }
4688
4689 /**
4690  * e1000_ioctl -
4691  * @netdev:
4692  * @ifreq:
4693  * @cmd:
4694  **/
4695
4696 static int
4697 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4698 {
4699         switch (cmd) {
4700         case SIOCGMIIPHY:
4701         case SIOCGMIIREG:
4702         case SIOCSMIIREG:
4703                 return e1000_mii_ioctl(netdev, ifr, cmd);
4704         default:
4705                 return -EOPNOTSUPP;
4706         }
4707 }
4708
4709 /**
4710  * e1000_mii_ioctl -
4711  * @netdev:
4712  * @ifreq:
4713  * @cmd:
4714  **/
4715
4716 static int
4717 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4718 {
4719         struct e1000_adapter *adapter = netdev_priv(netdev);
4720         struct mii_ioctl_data *data = if_mii(ifr);
4721         int retval;
4722         uint16_t mii_reg;
4723         uint16_t spddplx;
4724         unsigned long flags;
4725
4726         if (adapter->hw.media_type != e1000_media_type_copper)
4727                 return -EOPNOTSUPP;
4728
4729         switch (cmd) {
4730         case SIOCGMIIPHY:
4731                 data->phy_id = adapter->hw.phy_addr;
4732                 break;
4733         case SIOCGMIIREG:
4734                 if (!capable(CAP_NET_ADMIN))
4735                         return -EPERM;
4736                 spin_lock_irqsave(&adapter->stats_lock, flags);
4737                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4738                                    &data->val_out)) {
4739                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4740                         return -EIO;
4741                 }
4742                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4743                 break;
4744         case SIOCSMIIREG:
4745                 if (!capable(CAP_NET_ADMIN))
4746                         return -EPERM;
4747                 if (data->reg_num & ~(0x1F))
4748                         return -EFAULT;
4749                 mii_reg = data->val_in;
4750                 spin_lock_irqsave(&adapter->stats_lock, flags);
4751                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4752                                         mii_reg)) {
4753                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4754                         return -EIO;
4755                 }
4756                 if (adapter->hw.media_type == e1000_media_type_copper) {
4757                         switch (data->reg_num) {
4758                         case PHY_CTRL:
4759                                 if (mii_reg & MII_CR_POWER_DOWN)
4760                                         break;
4761                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4762                                         adapter->hw.autoneg = 1;
4763                                         adapter->hw.autoneg_advertised = 0x2F;
4764                                 } else {
4765                                         if (mii_reg & 0x40)
4766                                                 spddplx = SPEED_1000;
4767                                         else if (mii_reg & 0x2000)
4768                                                 spddplx = SPEED_100;
4769                                         else
4770                                                 spddplx = SPEED_10;
4771                                         spddplx += (mii_reg & 0x100)
4772                                                    ? DUPLEX_FULL :
4773                                                    DUPLEX_HALF;
4774                                         retval = e1000_set_spd_dplx(adapter,
4775                                                                     spddplx);
4776                                         if (retval) {
4777                                                 spin_unlock_irqrestore(
4778                                                         &adapter->stats_lock,
4779                                                         flags);
4780                                                 return retval;
4781                                         }
4782                                 }
4783                                 if (netif_running(adapter->netdev))
4784                                         e1000_reinit_locked(adapter);
4785                                 else
4786                                         e1000_reset(adapter);
4787                                 break;
4788                         case M88E1000_PHY_SPEC_CTRL:
4789                         case M88E1000_EXT_PHY_SPEC_CTRL:
4790                                 if (e1000_phy_reset(&adapter->hw)) {
4791                                         spin_unlock_irqrestore(
4792                                                 &adapter->stats_lock, flags);
4793                                         return -EIO;
4794                                 }
4795                                 break;
4796                         }
4797                 } else {
4798                         switch (data->reg_num) {
4799                         case PHY_CTRL:
4800                                 if (mii_reg & MII_CR_POWER_DOWN)
4801                                         break;
4802                                 if (netif_running(adapter->netdev))
4803                                         e1000_reinit_locked(adapter);
4804                                 else
4805                                         e1000_reset(adapter);
4806                                 break;
4807                         }
4808                 }
4809                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4810                 break;
4811         default:
4812                 return -EOPNOTSUPP;
4813         }
4814         return E1000_SUCCESS;
4815 }
4816
4817 void
4818 e1000_pci_set_mwi(struct e1000_hw *hw)
4819 {
4820         struct e1000_adapter *adapter = hw->back;
4821         int ret_val = pci_set_mwi(adapter->pdev);
4822
4823         if (ret_val)
4824                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4825 }
4826
4827 void
4828 e1000_pci_clear_mwi(struct e1000_hw *hw)
4829 {
4830         struct e1000_adapter *adapter = hw->back;
4831
4832         pci_clear_mwi(adapter->pdev);
4833 }
4834
4835 void
4836 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4837 {
4838         struct e1000_adapter *adapter = hw->back;
4839
4840         pci_read_config_word(adapter->pdev, reg, value);
4841 }
4842
4843 void
4844 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4845 {
4846         struct e1000_adapter *adapter = hw->back;
4847
4848         pci_write_config_word(adapter->pdev, reg, *value);
4849 }
4850
4851 int32_t
4852 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4853 {
4854     struct e1000_adapter *adapter = hw->back;
4855     uint16_t cap_offset;
4856
4857     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4858     if (!cap_offset)
4859         return -E1000_ERR_CONFIG;
4860
4861     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4862
4863     return E1000_SUCCESS;
4864 }
4865
4866 void
4867 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4868 {
4869         outl(value, port);
4870 }
4871
4872 static void
4873 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4874 {
4875         struct e1000_adapter *adapter = netdev_priv(netdev);
4876         uint32_t ctrl, rctl;
4877
4878         e1000_irq_disable(adapter);
4879         adapter->vlgrp = grp;
4880
4881         if (grp) {
4882                 /* enable VLAN tag insert/strip */
4883                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4884                 ctrl |= E1000_CTRL_VME;
4885                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4886
4887                 if (adapter->hw.mac_type != e1000_ich8lan) {
4888                         /* enable VLAN receive filtering */
4889                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4890                         rctl |= E1000_RCTL_VFE;
4891                         rctl &= ~E1000_RCTL_CFIEN;
4892                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4893                         e1000_update_mng_vlan(adapter);
4894                 }
4895         } else {
4896                 /* disable VLAN tag insert/strip */
4897                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4898                 ctrl &= ~E1000_CTRL_VME;
4899                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4900
4901                 if (adapter->hw.mac_type != e1000_ich8lan) {
4902                         /* disable VLAN filtering */
4903                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4904                         rctl &= ~E1000_RCTL_VFE;
4905                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4906                         if (adapter->mng_vlan_id !=
4907                             (uint16_t)E1000_MNG_VLAN_NONE) {
4908                                 e1000_vlan_rx_kill_vid(netdev,
4909                                                        adapter->mng_vlan_id);
4910                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4911                         }
4912                 }
4913         }
4914
4915         e1000_irq_enable(adapter);
4916 }
4917
4918 static void
4919 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4920 {
4921         struct e1000_adapter *adapter = netdev_priv(netdev);
4922         uint32_t vfta, index;
4923
4924         if ((adapter->hw.mng_cookie.status &
4925              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4926             (vid == adapter->mng_vlan_id))
4927                 return;
4928         /* add VID to filter table */
4929         index = (vid >> 5) & 0x7F;
4930         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4931         vfta |= (1 << (vid & 0x1F));
4932         e1000_write_vfta(&adapter->hw, index, vfta);
4933 }
4934
4935 static void
4936 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4937 {
4938         struct e1000_adapter *adapter = netdev_priv(netdev);
4939         uint32_t vfta, index;
4940
4941         e1000_irq_disable(adapter);
4942
4943         if (adapter->vlgrp)
4944                 adapter->vlgrp->vlan_devices[vid] = NULL;
4945
4946         e1000_irq_enable(adapter);
4947
4948         if ((adapter->hw.mng_cookie.status &
4949              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4950             (vid == adapter->mng_vlan_id)) {
4951                 /* release control to f/w */
4952                 e1000_release_hw_control(adapter);
4953                 return;
4954         }
4955
4956         /* remove VID from filter table */
4957         index = (vid >> 5) & 0x7F;
4958         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4959         vfta &= ~(1 << (vid & 0x1F));
4960         e1000_write_vfta(&adapter->hw, index, vfta);
4961 }
4962
4963 static void
4964 e1000_restore_vlan(struct e1000_adapter *adapter)
4965 {
4966         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4967
4968         if (adapter->vlgrp) {
4969                 uint16_t vid;
4970                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4971                         if (!adapter->vlgrp->vlan_devices[vid])
4972                                 continue;
4973                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4974                 }
4975         }
4976 }
4977
4978 int
4979 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4980 {
4981         adapter->hw.autoneg = 0;
4982
4983         /* Fiber NICs only allow 1000 gbps Full duplex */
4984         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4985                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4986                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4987                 return -EINVAL;
4988         }
4989
4990         switch (spddplx) {
4991         case SPEED_10 + DUPLEX_HALF:
4992                 adapter->hw.forced_speed_duplex = e1000_10_half;
4993                 break;
4994         case SPEED_10 + DUPLEX_FULL:
4995                 adapter->hw.forced_speed_duplex = e1000_10_full;
4996                 break;
4997         case SPEED_100 + DUPLEX_HALF:
4998                 adapter->hw.forced_speed_duplex = e1000_100_half;
4999                 break;
5000         case SPEED_100 + DUPLEX_FULL:
5001                 adapter->hw.forced_speed_duplex = e1000_100_full;
5002                 break;
5003         case SPEED_1000 + DUPLEX_FULL:
5004                 adapter->hw.autoneg = 1;
5005                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5006                 break;
5007         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5008         default:
5009                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5010                 return -EINVAL;
5011         }
5012         return 0;
5013 }
5014
5015 #ifdef CONFIG_PM
5016 /* Save/restore 16 or 64 dwords of PCI config space depending on which
5017  * bus we're on (PCI(X) vs. PCI-E)
5018  */
5019 #define PCIE_CONFIG_SPACE_LEN 256
5020 #define PCI_CONFIG_SPACE_LEN 64
5021 static int
5022 e1000_pci_save_state(struct e1000_adapter *adapter)
5023 {
5024         struct pci_dev *dev = adapter->pdev;
5025         int size;
5026         int i;
5027
5028         if (adapter->hw.mac_type >= e1000_82571)
5029                 size = PCIE_CONFIG_SPACE_LEN;
5030         else
5031                 size = PCI_CONFIG_SPACE_LEN;
5032
5033         WARN_ON(adapter->config_space != NULL);
5034
5035         adapter->config_space = kmalloc(size, GFP_KERNEL);
5036         if (!adapter->config_space) {
5037                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
5038                 return -ENOMEM;
5039         }
5040         for (i = 0; i < (size / 4); i++)
5041                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
5042         return 0;
5043 }
5044
5045 static void
5046 e1000_pci_restore_state(struct e1000_adapter *adapter)
5047 {
5048         struct pci_dev *dev = adapter->pdev;
5049         int size;
5050         int i;
5051
5052         if (adapter->config_space == NULL)
5053                 return;
5054
5055         if (adapter->hw.mac_type >= e1000_82571)
5056                 size = PCIE_CONFIG_SPACE_LEN;
5057         else
5058                 size = PCI_CONFIG_SPACE_LEN;
5059         for (i = 0; i < (size / 4); i++)
5060                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
5061         kfree(adapter->config_space);
5062         adapter->config_space = NULL;
5063         return;
5064 }
5065 #endif /* CONFIG_PM */
5066
5067 static int
5068 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5069 {
5070         struct net_device *netdev = pci_get_drvdata(pdev);
5071         struct e1000_adapter *adapter = netdev_priv(netdev);
5072         uint32_t ctrl, ctrl_ext, rctl, status;
5073         uint32_t wufc = adapter->wol;
5074 #ifdef CONFIG_PM
5075         int retval = 0;
5076 #endif
5077
5078         netif_device_detach(netdev);
5079
5080         if (netif_running(netdev)) {
5081                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5082                 e1000_down(adapter);
5083         }
5084
5085 #ifdef CONFIG_PM
5086         /* Implement our own version of pci_save_state(pdev) because pci-
5087          * express adapters have 256-byte config spaces. */
5088         retval = e1000_pci_save_state(adapter);
5089         if (retval)
5090                 return retval;
5091 #endif
5092
5093         status = E1000_READ_REG(&adapter->hw, STATUS);
5094         if (status & E1000_STATUS_LU)
5095                 wufc &= ~E1000_WUFC_LNKC;
5096
5097         if (wufc) {
5098                 e1000_setup_rctl(adapter);
5099                 e1000_set_multi(netdev);
5100
5101                 /* turn on all-multi mode if wake on multicast is enabled */
5102                 if (wufc & E1000_WUFC_MC) {
5103                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5104                         rctl |= E1000_RCTL_MPE;
5105                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5106                 }
5107
5108                 if (adapter->hw.mac_type >= e1000_82540) {
5109                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5110                         /* advertise wake from D3Cold */
5111                         #define E1000_CTRL_ADVD3WUC 0x00100000
5112                         /* phy power management enable */
5113                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5114                         ctrl |= E1000_CTRL_ADVD3WUC |
5115                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5116                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5117                 }
5118
5119                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5120                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5121                         /* keep the laser running in D3 */
5122                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5123                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5124                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5125                 }
5126
5127                 /* Allow time for pending master requests to run */
5128                 e1000_disable_pciex_master(&adapter->hw);
5129
5130                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5131                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5132                 pci_enable_wake(pdev, PCI_D3hot, 1);
5133                 pci_enable_wake(pdev, PCI_D3cold, 1);
5134         } else {
5135                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5136                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5137                 pci_enable_wake(pdev, PCI_D3hot, 0);
5138                 pci_enable_wake(pdev, PCI_D3cold, 0);
5139         }
5140
5141         e1000_release_manageability(adapter);
5142
5143         /* make sure adapter isn't asleep if manageability is enabled */
5144         if (adapter->en_mng_pt) {
5145                 pci_enable_wake(pdev, PCI_D3hot, 1);
5146                 pci_enable_wake(pdev, PCI_D3cold, 1);
5147         }
5148
5149         if (adapter->hw.phy_type == e1000_phy_igp_3)
5150                 e1000_phy_powerdown_workaround(&adapter->hw);
5151
5152         if (netif_running(netdev))
5153                 e1000_free_irq(adapter);
5154
5155         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5156          * would have already happened in close and is redundant. */
5157         e1000_release_hw_control(adapter);
5158
5159         pci_disable_device(pdev);
5160
5161         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5162
5163         return 0;
5164 }
5165
5166 #ifdef CONFIG_PM
5167 static int
5168 e1000_resume(struct pci_dev *pdev)
5169 {
5170         struct net_device *netdev = pci_get_drvdata(pdev);
5171         struct e1000_adapter *adapter = netdev_priv(netdev);
5172         uint32_t err;
5173
5174         pci_set_power_state(pdev, PCI_D0);
5175         e1000_pci_restore_state(adapter);
5176         if ((err = pci_enable_device(pdev))) {
5177                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5178                 return err;
5179         }
5180         pci_set_master(pdev);
5181
5182         pci_enable_wake(pdev, PCI_D3hot, 0);
5183         pci_enable_wake(pdev, PCI_D3cold, 0);
5184
5185         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5186                 return err;
5187
5188         e1000_power_up_phy(adapter);
5189         e1000_reset(adapter);
5190         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5191
5192         e1000_init_manageability(adapter);
5193
5194         if (netif_running(netdev))
5195                 e1000_up(adapter);
5196
5197         netif_device_attach(netdev);
5198
5199         /* If the controller is 82573 and f/w is AMT, do not set
5200          * DRV_LOAD until the interface is up.  For all other cases,
5201          * let the f/w know that the h/w is now under the control
5202          * of the driver. */
5203         if (adapter->hw.mac_type != e1000_82573 ||
5204             !e1000_check_mng_mode(&adapter->hw))
5205                 e1000_get_hw_control(adapter);
5206
5207         return 0;
5208 }
5209 #endif
5210
5211 static void e1000_shutdown(struct pci_dev *pdev)
5212 {
5213         e1000_suspend(pdev, PMSG_SUSPEND);
5214 }
5215
5216 #ifdef CONFIG_NET_POLL_CONTROLLER
5217 /*
5218  * Polling 'interrupt' - used by things like netconsole to send skbs
5219  * without having to re-enable interrupts. It's not called while
5220  * the interrupt routine is executing.
5221  */
5222 static void
5223 e1000_netpoll(struct net_device *netdev)
5224 {
5225         struct e1000_adapter *adapter = netdev_priv(netdev);
5226
5227         disable_irq(adapter->pdev->irq);
5228         e1000_intr(adapter->pdev->irq, netdev);
5229         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5230 #ifndef CONFIG_E1000_NAPI
5231         adapter->clean_rx(adapter, adapter->rx_ring);
5232 #endif
5233         enable_irq(adapter->pdev->irq);
5234 }
5235 #endif
5236
5237 /**
5238  * e1000_io_error_detected - called when PCI error is detected
5239  * @pdev: Pointer to PCI device
5240  * @state: The current pci conneection state
5241  *
5242  * This function is called after a PCI bus error affecting
5243  * this device has been detected.
5244  */
5245 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5246 {
5247         struct net_device *netdev = pci_get_drvdata(pdev);
5248         struct e1000_adapter *adapter = netdev->priv;
5249
5250         netif_device_detach(netdev);
5251
5252         if (netif_running(netdev))
5253                 e1000_down(adapter);
5254         pci_disable_device(pdev);
5255
5256         /* Request a slot slot reset. */
5257         return PCI_ERS_RESULT_NEED_RESET;
5258 }
5259
5260 /**
5261  * e1000_io_slot_reset - called after the pci bus has been reset.
5262  * @pdev: Pointer to PCI device
5263  *
5264  * Restart the card from scratch, as if from a cold-boot. Implementation
5265  * resembles the first-half of the e1000_resume routine.
5266  */
5267 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5268 {
5269         struct net_device *netdev = pci_get_drvdata(pdev);
5270         struct e1000_adapter *adapter = netdev->priv;
5271
5272         if (pci_enable_device(pdev)) {
5273                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5274                 return PCI_ERS_RESULT_DISCONNECT;
5275         }
5276         pci_set_master(pdev);
5277
5278         pci_enable_wake(pdev, PCI_D3hot, 0);
5279         pci_enable_wake(pdev, PCI_D3cold, 0);
5280
5281         e1000_reset(adapter);
5282         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5283
5284         return PCI_ERS_RESULT_RECOVERED;
5285 }
5286
5287 /**
5288  * e1000_io_resume - called when traffic can start flowing again.
5289  * @pdev: Pointer to PCI device
5290  *
5291  * This callback is called when the error recovery driver tells us that
5292  * its OK to resume normal operation. Implementation resembles the
5293  * second-half of the e1000_resume routine.
5294  */
5295 static void e1000_io_resume(struct pci_dev *pdev)
5296 {
5297         struct net_device *netdev = pci_get_drvdata(pdev);
5298         struct e1000_adapter *adapter = netdev->priv;
5299
5300         e1000_init_manageability(adapter);
5301
5302         if (netif_running(netdev)) {
5303                 if (e1000_up(adapter)) {
5304                         printk("e1000: can't bring device back up after reset\n");
5305                         return;
5306                 }
5307         }
5308
5309         netif_device_attach(netdev);
5310
5311         /* If the controller is 82573 and f/w is AMT, do not set
5312          * DRV_LOAD until the interface is up.  For all other cases,
5313          * let the f/w know that the h/w is now under the control
5314          * of the driver. */
5315         if (adapter->hw.mac_type != e1000_82573 ||
5316             !e1000_check_mng_mode(&adapter->hw))
5317                 e1000_get_hw_control(adapter);
5318
5319 }
5320
5321 /* e1000_main.c */