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 "7.3.20-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 #define COPYBREAK_DEFAULT 256
 217 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
 218 module_param(copybreak, uint, 0644);
 219 MODULE_PARM_DESC(copybreak,
 220         "Maximum size of packet that is copied to a new buffer on receive");
 221
 222 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 223                      pci_channel_state_t state);
 224 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 225 static void e1000_io_resume(struct pci_dev *pdev);
 226
 227 static struct pci_error_handlers e1000_err_handler = {
 228         .error_detected = e1000_io_error_detected,
 229         .slot_reset = e1000_io_slot_reset,
 230         .resume = e1000_io_resume,
 231 };
 232
 233 static struct pci_driver e1000_driver = {
 234         .name     = e1000_driver_name,
 235         .id_table = e1000_pci_tbl,
 236         .probe    = e1000_probe,
 237         .remove   = __devexit_p(e1000_remove),
 238 #ifdef CONFIG_PM
 239         /* Power Managment Hooks */
 240         .suspend  = e1000_suspend,
 241         .resume   = e1000_resume,
 242 #endif
 243         .shutdown = e1000_shutdown,
 244         .err_handler = &e1000_err_handler
 245 };
 246
 247 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 248 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 249 MODULE_LICENSE("GPL");
 250 MODULE_VERSION(DRV_VERSION);
 251
 252 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 253 module_param(debug, int, 0);
 254 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 255
 256 /**
 257  * e1000_init_module - Driver Registration Routine
 258  *
 259  * e1000_init_module is the first routine called when the driver is
 260  * loaded. All it does is register with the PCI subsystem.
 261  **/
 262
 263 static int __init
 264 e1000_init_module(void)
 265 {
 266         int ret;
 267         printk(KERN_INFO "%s - version %s\n",
 268                e1000_driver_string, e1000_driver_version);
 269
 270         printk(KERN_INFO "%s\n", e1000_copyright);
 271
 272         ret = pci_register_driver(&e1000_driver);
 273         if (copybreak != COPYBREAK_DEFAULT) {
 274                 if (copybreak == 0)
 275                         printk(KERN_INFO "e1000: copybreak disabled\n");
 276                 else
 277                         printk(KERN_INFO "e1000: copybreak enabled for "
 278                                "packets <= %u bytes\n", copybreak);
 279         }
 280         return ret;
 281 }
 282
 283 module_init(e1000_init_module);
 284
 285 /**
 286  * e1000_exit_module - Driver Exit Cleanup Routine
 287  *
 288  * e1000_exit_module is called just before the driver is removed
 289  * from memory.
 290  **/
 291
 292 static void __exit
 293 e1000_exit_module(void)
 294 {
 295         pci_unregister_driver(&e1000_driver);
 296 }
 297
 298 module_exit(e1000_exit_module);
 299
 300 static int e1000_request_irq(struct e1000_adapter *adapter)
 301 {
 302         struct net_device *netdev = adapter->netdev;
 303         int flags, err = 0;
 304
 305         flags = IRQF_SHARED;
 306 #ifdef CONFIG_PCI_MSI
 307         if (adapter->hw.mac_type >= e1000_82571) {
 308                 adapter->have_msi = TRUE;
 309                 if ((err = pci_enable_msi(adapter->pdev))) {
 310                         DPRINTK(PROBE, ERR,
 311                          "Unable to allocate MSI interrupt Error: %d\n", err);
 312                         adapter->have_msi = FALSE;
 313                 }
 314         }
 315         if (adapter->have_msi) {
 316                 flags &= ~IRQF_SHARED;
 317                 err = request_irq(adapter->pdev->irq, &e1000_intr_msi, flags,
 318                                   netdev->name, netdev);
 319                 if (err)
 320                         DPRINTK(PROBE, ERR,
 321                                "Unable to allocate interrupt Error: %d\n", err);
 322         } else
 323 #endif
 324         if ((err = request_irq(adapter->pdev->irq, &e1000_intr, flags,
 325                                netdev->name, netdev)))
 326                 DPRINTK(PROBE, ERR,
 327                         "Unable to allocate interrupt Error: %d\n", err);
 328
 329         return err;
 330 }
 331
 332 static void e1000_free_irq(struct e1000_adapter *adapter)
 333 {
 334         struct net_device *netdev = adapter->netdev;
 335
 336         free_irq(adapter->pdev->irq, netdev);
 337
 338 #ifdef CONFIG_PCI_MSI
 339         if (adapter->have_msi)
 340                 pci_disable_msi(adapter->pdev);
 341 #endif
 342 }
 343
 344 /**
 345  * e1000_irq_disable - Mask off interrupt generation on the NIC
 346  * @adapter: board private structure
 347  **/
 348
 349 static void
 350 e1000_irq_disable(struct e1000_adapter *adapter)
 351 {
 352         atomic_inc(&adapter->irq_sem);
 353         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 354         E1000_WRITE_FLUSH(&adapter->hw);
 355         synchronize_irq(adapter->pdev->irq);
 356 }
 357
 358 /**
 359  * e1000_irq_enable - Enable default interrupt generation settings
 360  * @adapter: board private structure
 361  **/
 362
 363 static void
 364 e1000_irq_enable(struct e1000_adapter *adapter)
 365 {
 366         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 367                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 368                 E1000_WRITE_FLUSH(&adapter->hw);
 369         }
 370 }
 371
 372 static void
 373 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 374 {
 375         struct net_device *netdev = adapter->netdev;
 376         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 377         uint16_t old_vid = adapter->mng_vlan_id;
 378         if (adapter->vlgrp) {
 379                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 380                         if (adapter->hw.mng_cookie.status &
 381                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 382                                 e1000_vlan_rx_add_vid(netdev, vid);
 383                                 adapter->mng_vlan_id = vid;
 384                         } else
 385                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 386
 387                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 388                                         (vid != old_vid) &&
 389                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 390                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 391                 } else
 392                         adapter->mng_vlan_id = vid;
 393         }
 394 }
 395
 396 /**
 397  * e1000_release_hw_control - release control of the h/w to f/w
 398  * @adapter: address of board private structure
 399  *
 400  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 401  * For ASF and Pass Through versions of f/w this means that the
 402  * driver is no longer loaded. For AMT version (only with 82573) i
 403  * of the f/w this means that the network i/f is closed.
 404  *
 405  **/
 406
 407 static void
 408 e1000_release_hw_control(struct e1000_adapter *adapter)
 409 {
 410         uint32_t ctrl_ext;
 411         uint32_t swsm;
 412         uint32_t extcnf;
 413
 414         /* Let firmware taken over control of h/w */
 415         switch (adapter->hw.mac_type) {
 416         case e1000_82571:
 417         case e1000_82572:
 418         case e1000_80003es2lan:
 419                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 420                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 421                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 422                 break;
 423         case e1000_82573:
 424                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 425                 E1000_WRITE_REG(&adapter->hw, SWSM,
 426                                 swsm & ~E1000_SWSM_DRV_LOAD);
 427         case e1000_ich8lan:
 428                 extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 429                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 430                                 extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
 431                 break;
 432         default:
 433                 break;
 434         }
 435 }
 436
 437 /**
 438  * e1000_get_hw_control - get control of the h/w from f/w
 439  * @adapter: address of board private structure
 440  *
 441  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 442  * For ASF and Pass Through versions of f/w this means that
 443  * the driver is loaded. For AMT version (only with 82573)
 444  * of the f/w this means that the network i/f is open.
 445  *
 446  **/
 447
 448 static void
 449 e1000_get_hw_control(struct e1000_adapter *adapter)
 450 {
 451         uint32_t ctrl_ext;
 452         uint32_t swsm;
 453         uint32_t extcnf;
 454
 455         /* Let firmware know the driver has taken over */
 456         switch (adapter->hw.mac_type) {
 457         case e1000_82571:
 458         case e1000_82572:
 459         case e1000_80003es2lan:
 460                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 461                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 462                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 463                 break;
 464         case e1000_82573:
 465                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 466                 E1000_WRITE_REG(&adapter->hw, SWSM,
 467                                 swsm | E1000_SWSM_DRV_LOAD);
 468                 break;
 469         case e1000_ich8lan:
 470                 extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
 471                 E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
 472                                 extcnf | E1000_EXTCNF_CTRL_SWFLAG);
 473                 break;
 474         default:
 475                 break;
 476         }
 477 }
 478
 479 static void
 480 e1000_init_manageability(struct e1000_adapter *adapter)
 481 {
 482         if (adapter->en_mng_pt) {
 483                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 484
 485                 /* disable hardware interception of ARP */
 486                 manc &= ~(E1000_MANC_ARP_EN);
 487
 488                 /* enable receiving management packets to the host */
 489                 /* this will probably generate destination unreachable messages
 490                  * from the host OS, but the packets will be handled on SMBUS */
 491                 if (adapter->hw.has_manc2h) {
 492                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
 493
 494                         manc |= E1000_MANC_EN_MNG2HOST;
 495 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 496 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 497                         manc2h |= E1000_MNG2HOST_PORT_623;
 498                         manc2h |= E1000_MNG2HOST_PORT_664;
 499                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
 500                 }
 501
 502                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 503         }
 504 }
 505
 506 static void
 507 e1000_release_manageability(struct e1000_adapter *adapter)
 508 {
 509         if (adapter->en_mng_pt) {
 510                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 511
 512                 /* re-enable hardware interception of ARP */
 513                 manc |= E1000_MANC_ARP_EN;
 514
 515                 if (adapter->hw.has_manc2h)
 516                         manc &= ~E1000_MANC_EN_MNG2HOST;
 517
 518                 /* don't explicitly have to mess with MANC2H since
 519                  * MANC has an enable disable that gates MANC2H */
 520
 521                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 522         }
 523 }
 524
 525 int
 526 e1000_up(struct e1000_adapter *adapter)
 527 {
 528         struct net_device *netdev = adapter->netdev;
 529         int i;
 530
 531         /* hardware has been reset, we need to reload some things */
 532
 533         e1000_set_multi(netdev);
 534
 535         e1000_restore_vlan(adapter);
 536         e1000_init_manageability(adapter);
 537
 538         e1000_configure_tx(adapter);
 539         e1000_setup_rctl(adapter);
 540         e1000_configure_rx(adapter);
 541         /* call E1000_DESC_UNUSED which always leaves
 542          * at least 1 descriptor unused to make sure
 543          * next_to_use != next_to_clean */
 544         for (i = 0; i < adapter->num_rx_queues; i++) {
 545                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 546                 adapter->alloc_rx_buf(adapter, ring,
 547                                       E1000_DESC_UNUSED(ring));
 548         }
 549
 550         adapter->tx_queue_len = netdev->tx_queue_len;
 551
 552 #ifdef CONFIG_E1000_NAPI
 553         netif_poll_enable(netdev);
 554 #endif
 555         e1000_irq_enable(adapter);
 556
 557         clear_bit(__E1000_DOWN, &adapter->flags);
 558
 559         /* fire a link change interrupt to start the watchdog */
 560         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
 561         return 0;
 562 }
 563
 564 /**
 565  * e1000_power_up_phy - restore link in case the phy was powered down
 566  * @adapter: address of board private structure
 567  *
 568  * The phy may be powered down to save power and turn off link when the
 569  * driver is unloaded and wake on lan is not enabled (among others)
 570  * *** this routine MUST be followed by a call to e1000_reset ***
 571  *
 572  **/
 573
 574 void e1000_power_up_phy(struct e1000_adapter *adapter)
 575 {
 576         uint16_t mii_reg = 0;
 577
 578         /* Just clear the power down bit to wake the phy back up */
 579         if (adapter->hw.media_type == e1000_media_type_copper) {
 580                 /* according to the manual, the phy will retain its
 581                  * settings across a power-down/up cycle */
 582                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 583                 mii_reg &= ~MII_CR_POWER_DOWN;
 584                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 585         }
 586 }
 587
 588 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 589 {
 590         /* Power down the PHY so no link is implied when interface is down *
 591          * The PHY cannot be powered down if any of the following is TRUE *
 592          * (a) WoL is enabled
 593          * (b) AMT is active
 594          * (c) SoL/IDER session is active */
 595         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 596            adapter->hw.media_type == e1000_media_type_copper) {
 597                 uint16_t mii_reg = 0;
 598
 599                 switch (adapter->hw.mac_type) {
 600                 case e1000_82540:
 601                 case e1000_82545:
 602                 case e1000_82545_rev_3:
 603                 case e1000_82546:
 604                 case e1000_82546_rev_3:
 605                 case e1000_82541:
 606                 case e1000_82541_rev_2:
 607                 case e1000_82547:
 608                 case e1000_82547_rev_2:
 609                         if (E1000_READ_REG(&adapter->hw, MANC) &
 610                             E1000_MANC_SMBUS_EN)
 611                                 goto out;
 612                         break;
 613                 case e1000_82571:
 614                 case e1000_82572:
 615                 case e1000_82573:
 616                 case e1000_80003es2lan:
 617                 case e1000_ich8lan:
 618                         if (e1000_check_mng_mode(&adapter->hw) ||
 619                             e1000_check_phy_reset_block(&adapter->hw))
 620                                 goto out;
 621                         break;
 622                 default:
 623                         goto out;
 624                 }
 625                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 626                 mii_reg |= MII_CR_POWER_DOWN;
 627                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 628                 mdelay(1);
 629         }
 630 out:
 631         return;
 632 }
 633
 634 void
 635 e1000_down(struct e1000_adapter *adapter)
 636 {
 637         struct net_device *netdev = adapter->netdev;
 638
 639         /* signal that we're down so the interrupt handler does not
 640          * reschedule our watchdog timer */
 641         set_bit(__E1000_DOWN, &adapter->flags);
 642
 643         e1000_irq_disable(adapter);
 644
 645         del_timer_sync(&adapter->tx_fifo_stall_timer);
 646         del_timer_sync(&adapter->watchdog_timer);
 647         del_timer_sync(&adapter->phy_info_timer);
 648
 649 #ifdef CONFIG_E1000_NAPI
 650         netif_poll_disable(netdev);
 651 #endif
 652         netdev->tx_queue_len = adapter->tx_queue_len;
 653         adapter->link_speed = 0;
 654         adapter->link_duplex = 0;
 655         netif_carrier_off(netdev);
 656         netif_stop_queue(netdev);
 657
 658         e1000_reset(adapter);
 659         e1000_clean_all_tx_rings(adapter);
 660         e1000_clean_all_rx_rings(adapter);
 661 }
 662
 663 void
 664 e1000_reinit_locked(struct e1000_adapter *adapter)
 665 {
 666         WARN_ON(in_interrupt());
 667         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 668                 msleep(1);
 669         e1000_down(adapter);
 670         e1000_up(adapter);
 671         clear_bit(__E1000_RESETTING, &adapter->flags);
 672 }
 673
 674 void
 675 e1000_reset(struct e1000_adapter *adapter)
 676 {
 677         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
 678         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 679         boolean_t legacy_pba_adjust = FALSE;
 680
 681         /* Repartition Pba for greater than 9k mtu
 682          * To take effect CTRL.RST is required.
 683          */
 684
 685         switch (adapter->hw.mac_type) {
 686         case e1000_82542_rev2_0:
 687         case e1000_82542_rev2_1:
 688         case e1000_82543:
 689         case e1000_82544:
 690         case e1000_82540:
 691         case e1000_82541:
 692         case e1000_82541_rev_2:
 693                 legacy_pba_adjust = TRUE;
 694                 pba = E1000_PBA_48K;
 695                 break;
 696         case e1000_82545:
 697         case e1000_82545_rev_3:
 698         case e1000_82546:
 699         case e1000_82546_rev_3:
 700                 pba = E1000_PBA_48K;
 701                 break;
 702         case e1000_82547:
 703         case e1000_82547_rev_2:
 704                 legacy_pba_adjust = TRUE;
 705                 pba = E1000_PBA_30K;
 706                 break;
 707         case e1000_82571:
 708         case e1000_82572:
 709         case e1000_80003es2lan:
 710                 pba = E1000_PBA_38K;
 711                 break;
 712         case e1000_82573:
 713                 pba = E1000_PBA_20K;
 714                 break;
 715         case e1000_ich8lan:
 716                 pba = E1000_PBA_8K;
 717         case e1000_undefined:
 718         case e1000_num_macs:
 719                 break;
 720         }
 721
 722         if (legacy_pba_adjust == TRUE) {
 723                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 724                         pba -= 8; /* allocate more FIFO for Tx */
 725
 726                 if (adapter->hw.mac_type == e1000_82547) {
 727                         adapter->tx_fifo_head = 0;
 728                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 729                         adapter->tx_fifo_size =
 730                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 731                         atomic_set(&adapter->tx_fifo_stall, 0);
 732                 }
 733         } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 734                 /* adjust PBA for jumbo frames */
 735                 E1000_WRITE_REG(&adapter->hw, PBA, pba);
 736
 737                 /* To maintain wire speed transmits, the Tx FIFO should be
 738                  * large enough to accomodate two full transmit packets,
 739                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 740                  * the Rx FIFO should be large enough to accomodate at least
 741                  * one full receive packet and is similarly rounded up and
 742                  * expressed in KB. */
 743                 pba = E1000_READ_REG(&adapter->hw, PBA);
 744                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 745                 tx_space = pba >> 16;
 746                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 747                 pba &= 0xffff;
 748                 /* don't include ethernet FCS because hardware appends/strips */
 749                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 750                                VLAN_TAG_SIZE;
 751                 min_tx_space = min_rx_space;
 752                 min_tx_space *= 2;
 753                 E1000_ROUNDUP(min_tx_space, 1024);
 754                 min_tx_space >>= 10;
 755                 E1000_ROUNDUP(min_rx_space, 1024);
 756                 min_rx_space >>= 10;
 757
 758                 /* If current Tx allocation is less than the min Tx FIFO size,
 759                  * and the min Tx FIFO size is less than the current Rx FIFO
 760                  * allocation, take space away from current Rx allocation */
 761                 if (tx_space < min_tx_space &&
 762                     ((min_tx_space - tx_space) < pba)) {
 763                         pba = pba - (min_tx_space - tx_space);
 764
 765                         /* PCI/PCIx hardware has PBA alignment constraints */
 766                         switch (adapter->hw.mac_type) {
 767                         case e1000_82545 ... e1000_82546_rev_3:
 768                                 pba &= ~(E1000_PBA_8K - 1);
 769                                 break;
 770                         default:
 771                                 break;
 772                         }
 773
 774                         /* if short on rx space, rx wins and must trump tx
 775                          * adjustment or use Early Receive if available */
 776                         if (pba < min_rx_space) {
 777                                 switch (adapter->hw.mac_type) {
 778                                 case e1000_82573:
 779                                         /* ERT enabled in e1000_configure_rx */
 780                                         break;
 781                                 default:
 782                                         pba = min_rx_space;
 783                                         break;
 784                                 }
 785                         }
 786                 }
 787         }
 788
 789         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 790
 791         /* flow control settings */
 792         /* Set the FC high water mark to 90% of the FIFO size.
 793          * Required to clear last 3 LSB */
 794         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 795         /* We can't use 90% on small FIFOs because the remainder
 796          * would be less than 1 full frame.  In this case, we size
 797          * it to allow at least a full frame above the high water
 798          *  mark. */
 799         if (pba < E1000_PBA_16K)
 800                 fc_high_water_mark = (pba * 1024) - 1600;
 801
 802         adapter->hw.fc_high_water = fc_high_water_mark;
 803         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 804         if (adapter->hw.mac_type == e1000_80003es2lan)
 805                 adapter->hw.fc_pause_time = 0xFFFF;
 806         else
 807                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 808         adapter->hw.fc_send_xon = 1;
 809         adapter->hw.fc = adapter->hw.original_fc;
 810
 811         /* Allow time for pending master requests to run */
 812         e1000_reset_hw(&adapter->hw);
 813         if (adapter->hw.mac_type >= e1000_82544)
 814                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 815
 816         if (e1000_init_hw(&adapter->hw))
 817                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 818         e1000_update_mng_vlan(adapter);
 819
 820         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 821         if (adapter->hw.mac_type >= e1000_82544 &&
 822             adapter->hw.mac_type <= e1000_82547_rev_2 &&
 823             adapter->hw.autoneg == 1 &&
 824             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
 825                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
 826                 /* clear phy power management bit if we are in gig only mode,
 827                  * which if enabled will attempt negotiation to 100Mb, which
 828                  * can cause a loss of link at power off or driver unload */
 829                 ctrl &= ~E1000_CTRL_SWDPIN3;
 830                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
 831         }
 832
 833         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 834         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 835
 836         e1000_reset_adaptive(&adapter->hw);
 837         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 838
 839         if (!adapter->smart_power_down &&
 840             (adapter->hw.mac_type == e1000_82571 ||
 841              adapter->hw.mac_type == e1000_82572)) {
 842                 uint16_t phy_data = 0;
 843                 /* speed up time to link by disabling smart power down, ignore
 844                  * the return value of this function because there is nothing
 845                  * different we would do if it failed */
 846                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 847                                    &phy_data);
 848                 phy_data &= ~IGP02E1000_PM_SPD;
 849                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 850                                     phy_data);
 851         }
 852
 853         e1000_release_manageability(adapter);
 854 }
 855
 856 /**
 857  * e1000_probe - Device Initialization Routine
 858  * @pdev: PCI device information struct
 859  * @ent: entry in e1000_pci_tbl
 860  *
 861  * Returns 0 on success, negative on failure
 862  *
 863  * e1000_probe initializes an adapter identified by a pci_dev structure.
 864  * The OS initialization, configuring of the adapter private structure,
 865  * and a hardware reset occur.
 866  **/
 867
 868 static int __devinit
 869 e1000_probe(struct pci_dev *pdev,
 870             const struct pci_device_id *ent)
 871 {
 872         struct net_device *netdev;
 873         struct e1000_adapter *adapter;
 874         unsigned long mmio_start, mmio_len;
 875         unsigned long flash_start, flash_len;
 876
 877         static int cards_found = 0;
 878         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 879         int i, err, pci_using_dac;
 880         uint16_t eeprom_data = 0;
 881         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 882         if ((err = pci_enable_device(pdev)))
 883                 return err;
 884
 885         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 886             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 887                 pci_using_dac = 1;
 888         } else {
 889                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 890                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 891                         E1000_ERR("No usable DMA configuration, aborting\n");
 892                         goto err_dma;
 893                 }
 894                 pci_using_dac = 0;
 895         }
 896
 897         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 898                 goto err_pci_reg;
 899
 900         pci_set_master(pdev);
 901
 902         err = -ENOMEM;
 903         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 904         if (!netdev)
 905                 goto err_alloc_etherdev;
 906
 907         SET_MODULE_OWNER(netdev);
 908         SET_NETDEV_DEV(netdev, &pdev->dev);
 909
 910         pci_set_drvdata(pdev, netdev);
 911         adapter = netdev_priv(netdev);
 912         adapter->netdev = netdev;
 913         adapter->pdev = pdev;
 914         adapter->hw.back = adapter;
 915         adapter->msg_enable = (1 << debug) - 1;
 916
 917         mmio_start = pci_resource_start(pdev, BAR_0);
 918         mmio_len = pci_resource_len(pdev, BAR_0);
 919
 920         err = -EIO;
 921         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 922         if (!adapter->hw.hw_addr)
 923                 goto err_ioremap;
 924
 925         for (i = BAR_1; i <= BAR_5; i++) {
 926                 if (pci_resource_len(pdev, i) == 0)
 927                         continue;
 928                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 929                         adapter->hw.io_base = pci_resource_start(pdev, i);
 930                         break;
 931                 }
 932         }
 933
 934         netdev->open = &e1000_open;
 935         netdev->stop = &e1000_close;
 936         netdev->hard_start_xmit = &e1000_xmit_frame;
 937         netdev->get_stats = &e1000_get_stats;
 938         netdev->set_multicast_list = &e1000_set_multi;
 939         netdev->set_mac_address = &e1000_set_mac;
 940         netdev->change_mtu = &e1000_change_mtu;
 941         netdev->do_ioctl = &e1000_ioctl;
 942         e1000_set_ethtool_ops(netdev);
 943         netdev->tx_timeout = &e1000_tx_timeout;
 944         netdev->watchdog_timeo = 5 * HZ;
 945 #ifdef CONFIG_E1000_NAPI
 946         netdev->poll = &e1000_clean;
 947         netdev->weight = 64;
 948 #endif
 949         netdev->vlan_rx_register = e1000_vlan_rx_register;
 950         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 951         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 952 #ifdef CONFIG_NET_POLL_CONTROLLER
 953         netdev->poll_controller = e1000_netpoll;
 954 #endif
 955         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 956
 957         netdev->mem_start = mmio_start;
 958         netdev->mem_end = mmio_start + mmio_len;
 959         netdev->base_addr = adapter->hw.io_base;
 960
 961         adapter->bd_number = cards_found;
 962
 963         /* setup the private structure */
 964
 965         if ((err = e1000_sw_init(adapter)))
 966                 goto err_sw_init;
 967
 968         err = -EIO;
 969         /* Flash BAR mapping must happen after e1000_sw_init
 970          * because it depends on mac_type */
 971         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 972            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 973                 flash_start = pci_resource_start(pdev, 1);
 974                 flash_len = pci_resource_len(pdev, 1);
 975                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 976                 if (!adapter->hw.flash_address)
 977                         goto err_flashmap;
 978         }
 979
 980         if (e1000_check_phy_reset_block(&adapter->hw))
 981                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 982
 983         if (adapter->hw.mac_type >= e1000_82543) {
 984                 netdev->features = NETIF_F_SG |
 985                                    NETIF_F_HW_CSUM |
 986                                    NETIF_F_HW_VLAN_TX |
 987                                    NETIF_F_HW_VLAN_RX |
 988                                    NETIF_F_HW_VLAN_FILTER;
 989                 if (adapter->hw.mac_type == e1000_ich8lan)
 990                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
 991         }
 992
 993         if ((adapter->hw.mac_type >= e1000_82544) &&
 994            (adapter->hw.mac_type != e1000_82547))
 995                 netdev->features |= NETIF_F_TSO;
 996
 997         if (adapter->hw.mac_type > e1000_82547_rev_2)
 998                 netdev->features |= NETIF_F_TSO6;
 999         if (pci_using_dac)
1000                 netdev->features |= NETIF_F_HIGHDMA;
1001
1002         netdev->features |= NETIF_F_LLTX;
1003
1004         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1005
1006         /* initialize eeprom parameters */
1007
1008         if (e1000_init_eeprom_params(&adapter->hw)) {
1009                 E1000_ERR("EEPROM initialization failed\n");
1010                 goto err_eeprom;
1011         }
1012
1013         /* before reading the EEPROM, reset the controller to
1014          * put the device in a known good starting state */
1015
1016         e1000_reset_hw(&adapter->hw);
1017
1018         /* make sure the EEPROM is good */
1019
1020         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1021                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1022                 goto err_eeprom;
1023         }
1024
1025         /* copy the MAC address out of the EEPROM */
1026
1027         if (e1000_read_mac_addr(&adapter->hw))
1028                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1029         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1030         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1031
1032         if (!is_valid_ether_addr(netdev->perm_addr)) {
1033                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1034                 goto err_eeprom;
1035         }
1036
1037         e1000_get_bus_info(&adapter->hw);
1038
1039         init_timer(&adapter->tx_fifo_stall_timer);
1040         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1041         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1042
1043         init_timer(&adapter->watchdog_timer);
1044         adapter->watchdog_timer.function = &e1000_watchdog;
1045         adapter->watchdog_timer.data = (unsigned long) adapter;
1046
1047         init_timer(&adapter->phy_info_timer);
1048         adapter->phy_info_timer.function = &e1000_update_phy_info;
1049         adapter->phy_info_timer.data = (unsigned long) adapter;
1050
1051         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1052
1053         e1000_check_options(adapter);
1054
1055         /* Initial Wake on LAN setting
1056          * If APM wake is enabled in the EEPROM,
1057          * enable the ACPI Magic Packet filter
1058          */
1059
1060         switch (adapter->hw.mac_type) {
1061         case e1000_82542_rev2_0:
1062         case e1000_82542_rev2_1:
1063         case e1000_82543:
1064                 break;
1065         case e1000_82544:
1066                 e1000_read_eeprom(&adapter->hw,
1067                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1068                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1069                 break;
1070         case e1000_ich8lan:
1071                 e1000_read_eeprom(&adapter->hw,
1072                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1073                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1074                 break;
1075         case e1000_82546:
1076         case e1000_82546_rev_3:
1077         case e1000_82571:
1078         case e1000_80003es2lan:
1079                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1080                         e1000_read_eeprom(&adapter->hw,
1081                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1082                         break;
1083                 }
1084                 /* Fall Through */
1085         default:
1086                 e1000_read_eeprom(&adapter->hw,
1087                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1088                 break;
1089         }
1090         if (eeprom_data & eeprom_apme_mask)
1091                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1092
1093         /* now that we have the eeprom settings, apply the special cases
1094          * where the eeprom may be wrong or the board simply won't support
1095          * wake on lan on a particular port */
1096         switch (pdev->device) {
1097         case E1000_DEV_ID_82546GB_PCIE:
1098                 adapter->eeprom_wol = 0;
1099                 break;
1100         case E1000_DEV_ID_82546EB_FIBER:
1101         case E1000_DEV_ID_82546GB_FIBER:
1102         case E1000_DEV_ID_82571EB_FIBER:
1103                 /* Wake events only supported on port A for dual fiber
1104                  * regardless of eeprom setting */
1105                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1106                         adapter->eeprom_wol = 0;
1107                 break;
1108         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1109         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1110         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1111                 /* if quad port adapter, disable WoL on all but port A */
1112                 if (global_quad_port_a != 0)
1113                         adapter->eeprom_wol = 0;
1114                 else
1115                         adapter->quad_port_a = 1;
1116                 /* Reset for multiple quad port adapters */
1117                 if (++global_quad_port_a == 4)
1118                         global_quad_port_a = 0;
1119                 break;
1120         }
1121
1122         /* initialize the wol settings based on the eeprom settings */
1123         adapter->wol = adapter->eeprom_wol;
1124
1125         /* print bus type/speed/width info */
1126         {
1127         struct e1000_hw *hw = &adapter->hw;
1128         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1129                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1130                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1131                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1132                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1133                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1134                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1135                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1136                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1137                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1138                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1139                  "32-bit"));
1140         }
1141
1142         for (i = 0; i < 6; i++)
1143                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
1144
1145         /* reset the hardware with the new settings */
1146         e1000_reset(adapter);
1147
1148         /* If the controller is 82573 and f/w is AMT, do not set
1149          * DRV_LOAD until the interface is up.  For all other cases,
1150          * let the f/w know that the h/w is now under the control
1151          * of the driver. */
1152         if (adapter->hw.mac_type != e1000_82573 ||
1153             !e1000_check_mng_mode(&adapter->hw))
1154                 e1000_get_hw_control(adapter);
1155
1156         strcpy(netdev->name, "eth%d");
1157         if ((err = register_netdev(netdev)))
1158                 goto err_register;
1159
1160         /* tell the stack to leave us alone until e1000_open() is called */
1161         netif_carrier_off(netdev);
1162         netif_stop_queue(netdev);
1163
1164         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1165
1166         cards_found++;
1167         return 0;
1168
1169 err_register:
1170         e1000_release_hw_control(adapter);
1171 err_eeprom:
1172         if (!e1000_check_phy_reset_block(&adapter->hw))
1173                 e1000_phy_hw_reset(&adapter->hw);
1174
1175         if (adapter->hw.flash_address)
1176                 iounmap(adapter->hw.flash_address);
1177 err_flashmap:
1178 #ifdef CONFIG_E1000_NAPI
1179         for (i = 0; i < adapter->num_rx_queues; i++)
1180                 dev_put(&adapter->polling_netdev[i]);
1181 #endif
1182
1183         kfree(adapter->tx_ring);
1184         kfree(adapter->rx_ring);
1185 #ifdef CONFIG_E1000_NAPI
1186         kfree(adapter->polling_netdev);
1187 #endif
1188 err_sw_init:
1189         iounmap(adapter->hw.hw_addr);
1190 err_ioremap:
1191         free_netdev(netdev);
1192 err_alloc_etherdev:
1193         pci_release_regions(pdev);
1194 err_pci_reg:
1195 err_dma:
1196         pci_disable_device(pdev);
1197         return err;
1198 }
1199
1200 /**
1201  * e1000_remove - Device Removal Routine
1202  * @pdev: PCI device information struct
1203  *
1204  * e1000_remove is called by the PCI subsystem to alert the driver
1205  * that it should release a PCI device.  The could be caused by a
1206  * Hot-Plug event, or because the driver is going to be removed from
1207  * memory.
1208  **/
1209
1210 static void __devexit
1211 e1000_remove(struct pci_dev *pdev)
1212 {
1213         struct net_device *netdev = pci_get_drvdata(pdev);
1214         struct e1000_adapter *adapter = netdev_priv(netdev);
1215 #ifdef CONFIG_E1000_NAPI
1216         int i;
1217 #endif
1218
1219         flush_scheduled_work();
1220
1221         e1000_release_manageability(adapter);
1222
1223         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1224          * would have already happened in close and is redundant. */
1225         e1000_release_hw_control(adapter);
1226
1227         unregister_netdev(netdev);
1228 #ifdef CONFIG_E1000_NAPI
1229         for (i = 0; i < adapter->num_rx_queues; i++)
1230                 dev_put(&adapter->polling_netdev[i]);
1231 #endif
1232
1233         if (!e1000_check_phy_reset_block(&adapter->hw))
1234                 e1000_phy_hw_reset(&adapter->hw);
1235
1236         kfree(adapter->tx_ring);
1237         kfree(adapter->rx_ring);
1238 #ifdef CONFIG_E1000_NAPI
1239         kfree(adapter->polling_netdev);
1240 #endif
1241
1242         iounmap(adapter->hw.hw_addr);
1243         if (adapter->hw.flash_address)
1244                 iounmap(adapter->hw.flash_address);
1245         pci_release_regions(pdev);
1246
1247         free_netdev(netdev);
1248
1249         pci_disable_device(pdev);
1250 }
1251
1252 /**
1253  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1254  * @adapter: board private structure to initialize
1255  *
1256  * e1000_sw_init initializes the Adapter private data structure.
1257  * Fields are initialized based on PCI device information and
1258  * OS network device settings (MTU size).
1259  **/
1260
1261 static int __devinit
1262 e1000_sw_init(struct e1000_adapter *adapter)
1263 {
1264         struct e1000_hw *hw = &adapter->hw;
1265         struct net_device *netdev = adapter->netdev;
1266         struct pci_dev *pdev = adapter->pdev;
1267 #ifdef CONFIG_E1000_NAPI
1268         int i;
1269 #endif
1270
1271         /* PCI config space info */
1272
1273         hw->vendor_id = pdev->vendor;
1274         hw->device_id = pdev->device;
1275         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1276         hw->subsystem_id = pdev->subsystem_device;
1277
1278         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1279
1280         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1281
1282         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1283         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1284         hw->max_frame_size = netdev->mtu +
1285                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1286         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1287
1288         /* identify the MAC */
1289
1290         if (e1000_set_mac_type(hw)) {
1291                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1292                 return -EIO;
1293         }
1294
1295         switch (hw->mac_type) {
1296         default:
1297                 break;
1298         case e1000_82541:
1299         case e1000_82547:
1300         case e1000_82541_rev_2:
1301         case e1000_82547_rev_2:
1302                 hw->phy_init_script = 1;
1303                 break;
1304         }
1305
1306         e1000_set_media_type(hw);
1307
1308         hw->wait_autoneg_complete = FALSE;
1309         hw->tbi_compatibility_en = TRUE;
1310         hw->adaptive_ifs = TRUE;
1311
1312         /* Copper options */
1313
1314         if (hw->media_type == e1000_media_type_copper) {
1315                 hw->mdix = AUTO_ALL_MODES;
1316                 hw->disable_polarity_correction = FALSE;
1317                 hw->master_slave = E1000_MASTER_SLAVE;
1318         }
1319
1320         adapter->num_tx_queues = 1;
1321         adapter->num_rx_queues = 1;
1322
1323         if (e1000_alloc_queues(adapter)) {
1324                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1325                 return -ENOMEM;
1326         }
1327
1328 #ifdef CONFIG_E1000_NAPI
1329         for (i = 0; i < adapter->num_rx_queues; i++) {
1330                 adapter->polling_netdev[i].priv = adapter;
1331                 adapter->polling_netdev[i].poll = &e1000_clean;
1332                 adapter->polling_netdev[i].weight = 64;
1333                 dev_hold(&adapter->polling_netdev[i]);
1334                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1335         }
1336         spin_lock_init(&adapter->tx_queue_lock);
1337 #endif
1338
1339         atomic_set(&adapter->irq_sem, 1);
1340         spin_lock_init(&adapter->stats_lock);
1341
1342         set_bit(__E1000_DOWN, &adapter->flags);
1343
1344         return 0;
1345 }
1346
1347 /**
1348  * e1000_alloc_queues - Allocate memory for all rings
1349  * @adapter: board private structure to initialize
1350  *
1351  * We allocate one ring per queue at run-time since we don't know the
1352  * number of queues at compile-time.  The polling_netdev array is
1353  * intended for Multiqueue, but should work fine with a single queue.
1354  **/
1355
1356 static int __devinit
1357 e1000_alloc_queues(struct e1000_adapter *adapter)
1358 {
1359         int size;
1360
1361         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1362         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1363         if (!adapter->tx_ring)
1364                 return -ENOMEM;
1365         memset(adapter->tx_ring, 0, size);
1366
1367         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1368         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1369         if (!adapter->rx_ring) {
1370                 kfree(adapter->tx_ring);
1371                 return -ENOMEM;
1372         }
1373         memset(adapter->rx_ring, 0, size);
1374
1375 #ifdef CONFIG_E1000_NAPI
1376         size = sizeof(struct net_device) * adapter->num_rx_queues;
1377         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1378         if (!adapter->polling_netdev) {
1379                 kfree(adapter->tx_ring);
1380                 kfree(adapter->rx_ring);
1381                 return -ENOMEM;
1382         }
1383         memset(adapter->polling_netdev, 0, size);
1384 #endif
1385
1386         return E1000_SUCCESS;
1387 }
1388
1389 /**
1390  * e1000_open - Called when a network interface is made active
1391  * @netdev: network interface device structure
1392  *
1393  * Returns 0 on success, negative value on failure
1394  *
1395  * The open entry point is called when a network interface is made
1396  * active by the system (IFF_UP).  At this point all resources needed
1397  * for transmit and receive operations are allocated, the interrupt
1398  * handler is registered with the OS, the watchdog timer is started,
1399  * and the stack is notified that the interface is ready.
1400  **/
1401
1402 static int
1403 e1000_open(struct net_device *netdev)
1404 {
1405         struct e1000_adapter *adapter = netdev_priv(netdev);
1406         int err;
1407
1408         /* disallow open during test */
1409         if (test_bit(__E1000_TESTING, &adapter->flags))
1410                 return -EBUSY;
1411
1412         /* allocate transmit descriptors */
1413         if ((err = e1000_setup_all_tx_resources(adapter)))
1414                 goto err_setup_tx;
1415
1416         /* allocate receive descriptors */
1417         if ((err = e1000_setup_all_rx_resources(adapter)))
1418                 goto err_setup_rx;
1419
1420         err = e1000_request_irq(adapter);
1421         if (err)
1422                 goto err_req_irq;
1423
1424         e1000_power_up_phy(adapter);
1425
1426         if ((err = e1000_up(adapter)))
1427                 goto err_up;
1428         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1429         if ((adapter->hw.mng_cookie.status &
1430                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1431                 e1000_update_mng_vlan(adapter);
1432         }
1433
1434         /* If AMT is enabled, let the firmware know that the network
1435          * interface is now open */
1436         if (adapter->hw.mac_type == e1000_82573 &&
1437             e1000_check_mng_mode(&adapter->hw))
1438                 e1000_get_hw_control(adapter);
1439
1440         return E1000_SUCCESS;
1441
1442 err_up:
1443         e1000_power_down_phy(adapter);
1444         e1000_free_irq(adapter);
1445 err_req_irq:
1446         e1000_free_all_rx_resources(adapter);
1447 err_setup_rx:
1448         e1000_free_all_tx_resources(adapter);
1449 err_setup_tx:
1450         e1000_reset(adapter);
1451
1452         return err;
1453 }
1454
1455 /**
1456  * e1000_close - Disables a network interface
1457  * @netdev: network interface device structure
1458  *
1459  * Returns 0, this is not allowed to fail
1460  *
1461  * The close entry point is called when an interface is de-activated
1462  * by the OS.  The hardware is still under the drivers control, but
1463  * needs to be disabled.  A global MAC reset is issued to stop the
1464  * hardware, and all transmit and receive resources are freed.
1465  **/
1466
1467 static int
1468 e1000_close(struct net_device *netdev)
1469 {
1470         struct e1000_adapter *adapter = netdev_priv(netdev);
1471
1472         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1473         e1000_down(adapter);
1474         e1000_power_down_phy(adapter);
1475         e1000_free_irq(adapter);
1476
1477         e1000_free_all_tx_resources(adapter);
1478         e1000_free_all_rx_resources(adapter);
1479
1480         /* kill manageability vlan ID if supported, but not if a vlan with
1481          * the same ID is registered on the host OS (let 8021q kill it) */
1482         if ((adapter->hw.mng_cookie.status &
1483                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1484              !(adapter->vlgrp &&
1485                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1486                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1487         }
1488
1489         /* If AMT is enabled, let the firmware know that the network
1490          * interface is now closed */
1491         if (adapter->hw.mac_type == e1000_82573 &&
1492             e1000_check_mng_mode(&adapter->hw))
1493                 e1000_release_hw_control(adapter);
1494
1495         return 0;
1496 }
1497
1498 /**
1499  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1500  * @adapter: address of board private structure
1501  * @start: address of beginning of memory
1502  * @len: length of memory
1503  **/
1504 static boolean_t
1505 e1000_check_64k_bound(struct e1000_adapter *adapter,
1506                       void *start, unsigned long len)
1507 {
1508         unsigned long begin = (unsigned long) start;
1509         unsigned long end = begin + len;
1510
1511         /* First rev 82545 and 82546 need to not allow any memory
1512          * write location to cross 64k boundary due to errata 23 */
1513         if (adapter->hw.mac_type == e1000_82545 ||
1514             adapter->hw.mac_type == e1000_82546) {
1515                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1516         }
1517
1518         return TRUE;
1519 }
1520
1521 /**
1522  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1523  * @adapter: board private structure
1524  * @txdr:    tx descriptor ring (for a specific queue) to setup
1525  *
1526  * Return 0 on success, negative on failure
1527  **/
1528
1529 static int
1530 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1531                          struct e1000_tx_ring *txdr)
1532 {
1533         struct pci_dev *pdev = adapter->pdev;
1534         int size;
1535
1536         size = sizeof(struct e1000_buffer) * txdr->count;
1537         txdr->buffer_info = vmalloc(size);
1538         if (!txdr->buffer_info) {
1539                 DPRINTK(PROBE, ERR,
1540                 "Unable to allocate memory for the transmit descriptor ring\n");
1541                 return -ENOMEM;
1542         }
1543         memset(txdr->buffer_info, 0, size);
1544
1545         /* round up to nearest 4K */
1546
1547         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1548         E1000_ROUNDUP(txdr->size, 4096);
1549
1550         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1551         if (!txdr->desc) {
1552 setup_tx_desc_die:
1553                 vfree(txdr->buffer_info);
1554                 DPRINTK(PROBE, ERR,
1555                 "Unable to allocate memory for the transmit descriptor ring\n");
1556                 return -ENOMEM;
1557         }
1558
1559         /* Fix for errata 23, can't cross 64kB boundary */
1560         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1561                 void *olddesc = txdr->desc;
1562                 dma_addr_t olddma = txdr->dma;
1563                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1564                                      "at %p\n", txdr->size, txdr->desc);
1565                 /* Try again, without freeing the previous */
1566                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1567                 /* Failed allocation, critical failure */
1568                 if (!txdr->desc) {
1569                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1570                         goto setup_tx_desc_die;
1571                 }
1572
1573                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1574                         /* give up */
1575                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1576                                             txdr->dma);
1577                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1578                         DPRINTK(PROBE, ERR,
1579                                 "Unable to allocate aligned memory "
1580                                 "for the transmit descriptor ring\n");
1581                         vfree(txdr->buffer_info);
1582                         return -ENOMEM;
1583                 } else {
1584                         /* Free old allocation, new allocation was successful */
1585                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1586                 }
1587         }
1588         memset(txdr->desc, 0, txdr->size);
1589
1590         txdr->next_to_use = 0;
1591         txdr->next_to_clean = 0;
1592         spin_lock_init(&txdr->tx_lock);
1593
1594         return 0;
1595 }
1596
1597 /**
1598  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1599  *                                (Descriptors) for all queues
1600  * @adapter: board private structure
1601  *
1602  * Return 0 on success, negative on failure
1603  **/
1604
1605 int
1606 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1607 {
1608         int i, err = 0;
1609
1610         for (i = 0; i < adapter->num_tx_queues; i++) {
1611                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1612                 if (err) {
1613                         DPRINTK(PROBE, ERR,
1614                                 "Allocation for Tx Queue %u failed\n", i);
1615                         for (i-- ; i >= 0; i--)
1616                                 e1000_free_tx_resources(adapter,
1617                                                         &adapter->tx_ring[i]);
1618                         break;
1619                 }
1620         }
1621
1622         return err;
1623 }
1624
1625 /**
1626  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1627  * @adapter: board private structure
1628  *
1629  * Configure the Tx unit of the MAC after a reset.
1630  **/
1631
1632 static void
1633 e1000_configure_tx(struct e1000_adapter *adapter)
1634 {
1635         uint64_t tdba;
1636         struct e1000_hw *hw = &adapter->hw;
1637         uint32_t tdlen, tctl, tipg, tarc;
1638         uint32_t ipgr1, ipgr2;
1639
1640         /* Setup the HW Tx Head and Tail descriptor pointers */
1641
1642         switch (adapter->num_tx_queues) {
1643         case 1:
1644         default:
1645                 tdba = adapter->tx_ring[0].dma;
1646                 tdlen = adapter->tx_ring[0].count *
1647                         sizeof(struct e1000_tx_desc);
1648                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1649                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1650                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1651                 E1000_WRITE_REG(hw, TDT, 0);
1652                 E1000_WRITE_REG(hw, TDH, 0);
1653                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1654                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1655                 break;
1656         }
1657
1658         /* Set the default values for the Tx Inter Packet Gap timer */
1659         if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1660             (hw->media_type == e1000_media_type_fiber ||
1661              hw->media_type == e1000_media_type_internal_serdes))
1662                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1663         else
1664                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1665
1666         switch (hw->mac_type) {
1667         case e1000_82542_rev2_0:
1668         case e1000_82542_rev2_1:
1669                 tipg = DEFAULT_82542_TIPG_IPGT;
1670                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1671                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1672                 break;
1673         case e1000_80003es2lan:
1674                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1675                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1676                 break;
1677         default:
1678                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1679                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1680                 break;
1681         }
1682         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1683         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1684         E1000_WRITE_REG(hw, TIPG, tipg);
1685
1686         /* Set the Tx Interrupt Delay register */
1687
1688         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1689         if (hw->mac_type >= e1000_82540)
1690                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1691
1692         /* Program the Transmit Control Register */
1693
1694         tctl = E1000_READ_REG(hw, TCTL);
1695         tctl &= ~E1000_TCTL_CT;
1696         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1697                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1698
1699         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1700                 tarc = E1000_READ_REG(hw, TARC0);
1701                 /* set the speed mode bit, we'll clear it if we're not at
1702                  * gigabit link later */
1703                 tarc |= (1 << 21);
1704                 E1000_WRITE_REG(hw, TARC0, tarc);
1705         } else if (hw->mac_type == e1000_80003es2lan) {
1706                 tarc = E1000_READ_REG(hw, TARC0);
1707                 tarc |= 1;
1708                 E1000_WRITE_REG(hw, TARC0, tarc);
1709                 tarc = E1000_READ_REG(hw, TARC1);
1710                 tarc |= 1;
1711                 E1000_WRITE_REG(hw, TARC1, tarc);
1712         }
1713
1714         e1000_config_collision_dist(hw);
1715
1716         /* Setup Transmit Descriptor Settings for eop descriptor */
1717         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1718
1719         /* only set IDE if we are delaying interrupts using the timers */
1720         if (adapter->tx_int_delay)
1721                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1722
1723         if (hw->mac_type < e1000_82543)
1724                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1725         else
1726                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1727
1728         /* Cache if we're 82544 running in PCI-X because we'll
1729          * need this to apply a workaround later in the send path. */
1730         if (hw->mac_type == e1000_82544 &&
1731             hw->bus_type == e1000_bus_type_pcix)
1732                 adapter->pcix_82544 = 1;
1733
1734         E1000_WRITE_REG(hw, TCTL, tctl);
1735
1736 }
1737
1738 /**
1739  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1740  * @adapter: board private structure
1741  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1742  *
1743  * Returns 0 on success, negative on failure
1744  **/
1745
1746 static int
1747 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1748                          struct e1000_rx_ring *rxdr)
1749 {
1750         struct pci_dev *pdev = adapter->pdev;
1751         int size, desc_len;
1752
1753         size = sizeof(struct e1000_buffer) * rxdr->count;
1754         rxdr->buffer_info = vmalloc(size);
1755         if (!rxdr->buffer_info) {
1756                 DPRINTK(PROBE, ERR,
1757                 "Unable to allocate memory for the receive descriptor ring\n");
1758                 return -ENOMEM;
1759         }
1760         memset(rxdr->buffer_info, 0, size);
1761
1762         size = sizeof(struct e1000_ps_page) * rxdr->count;
1763         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1764         if (!rxdr->ps_page) {
1765                 vfree(rxdr->buffer_info);
1766                 DPRINTK(PROBE, ERR,
1767                 "Unable to allocate memory for the receive descriptor ring\n");
1768                 return -ENOMEM;
1769         }
1770         memset(rxdr->ps_page, 0, size);
1771
1772         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1773         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1774         if (!rxdr->ps_page_dma) {
1775                 vfree(rxdr->buffer_info);
1776                 kfree(rxdr->ps_page);
1777                 DPRINTK(PROBE, ERR,
1778                 "Unable to allocate memory for the receive descriptor ring\n");
1779                 return -ENOMEM;
1780         }
1781         memset(rxdr->ps_page_dma, 0, size);
1782
1783         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1784                 desc_len = sizeof(struct e1000_rx_desc);
1785         else
1786                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1787
1788         /* Round up to nearest 4K */
1789
1790         rxdr->size = rxdr->count * desc_len;
1791         E1000_ROUNDUP(rxdr->size, 4096);
1792
1793         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1794
1795         if (!rxdr->desc) {
1796                 DPRINTK(PROBE, ERR,
1797                 "Unable to allocate memory for the receive descriptor ring\n");
1798 setup_rx_desc_die:
1799                 vfree(rxdr->buffer_info);
1800                 kfree(rxdr->ps_page);
1801                 kfree(rxdr->ps_page_dma);
1802                 return -ENOMEM;
1803         }
1804
1805         /* Fix for errata 23, can't cross 64kB boundary */
1806         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1807                 void *olddesc = rxdr->desc;
1808                 dma_addr_t olddma = rxdr->dma;
1809                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1810                                      "at %p\n", rxdr->size, rxdr->desc);
1811                 /* Try again, without freeing the previous */
1812                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1813                 /* Failed allocation, critical failure */
1814                 if (!rxdr->desc) {
1815                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1816                         DPRINTK(PROBE, ERR,
1817                                 "Unable to allocate memory "
1818                                 "for the receive descriptor ring\n");
1819                         goto setup_rx_desc_die;
1820                 }
1821
1822                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1823                         /* give up */
1824                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1825                                             rxdr->dma);
1826                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1827                         DPRINTK(PROBE, ERR,
1828                                 "Unable to allocate aligned memory "
1829                                 "for the receive descriptor ring\n");
1830                         goto setup_rx_desc_die;
1831                 } else {
1832                         /* Free old allocation, new allocation was successful */
1833                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1834                 }
1835         }
1836         memset(rxdr->desc, 0, rxdr->size);
1837
1838         rxdr->next_to_clean = 0;
1839         rxdr->next_to_use = 0;
1840
1841         return 0;
1842 }
1843
1844 /**
1845  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1846  *                                (Descriptors) for all queues
1847  * @adapter: board private structure
1848  *
1849  * Return 0 on success, negative on failure
1850  **/
1851
1852 int
1853 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1854 {
1855         int i, err = 0;
1856
1857         for (i = 0; i < adapter->num_rx_queues; i++) {
1858                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1859                 if (err) {
1860                         DPRINTK(PROBE, ERR,
1861                                 "Allocation for Rx Queue %u failed\n", i);
1862                         for (i-- ; i >= 0; i--)
1863                                 e1000_free_rx_resources(adapter,
1864                                                         &adapter->rx_ring[i]);
1865                         break;
1866                 }
1867         }
1868
1869         return err;
1870 }
1871
1872 /**
1873  * e1000_setup_rctl - configure the receive control registers
1874  * @adapter: Board private structure
1875  **/
1876 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1877                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1878 static void
1879 e1000_setup_rctl(struct e1000_adapter *adapter)
1880 {
1881         uint32_t rctl, rfctl;
1882         uint32_t psrctl = 0;
1883 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1884         uint32_t pages = 0;
1885 #endif
1886
1887         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1888
1889         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1890
1891         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1892                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1893                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1894
1895         if (adapter->hw.tbi_compatibility_on == 1)
1896                 rctl |= E1000_RCTL_SBP;
1897         else
1898                 rctl &= ~E1000_RCTL_SBP;
1899
1900         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1901                 rctl &= ~E1000_RCTL_LPE;
1902         else
1903                 rctl |= E1000_RCTL_LPE;
1904
1905         /* Setup buffer sizes */
1906         rctl &= ~E1000_RCTL_SZ_4096;
1907         rctl |= E1000_RCTL_BSEX;
1908         switch (adapter->rx_buffer_len) {
1909                 case E1000_RXBUFFER_256:
1910                         rctl |= E1000_RCTL_SZ_256;
1911                         rctl &= ~E1000_RCTL_BSEX;
1912                         break;
1913                 case E1000_RXBUFFER_512:
1914                         rctl |= E1000_RCTL_SZ_512;
1915                         rctl &= ~E1000_RCTL_BSEX;
1916                         break;
1917                 case E1000_RXBUFFER_1024:
1918                         rctl |= E1000_RCTL_SZ_1024;
1919                         rctl &= ~E1000_RCTL_BSEX;
1920                         break;
1921                 case E1000_RXBUFFER_2048:
1922                 default:
1923                         rctl |= E1000_RCTL_SZ_2048;
1924                         rctl &= ~E1000_RCTL_BSEX;
1925                         break;
1926                 case E1000_RXBUFFER_4096:
1927                         rctl |= E1000_RCTL_SZ_4096;
1928                         break;
1929                 case E1000_RXBUFFER_8192:
1930                         rctl |= E1000_RCTL_SZ_8192;
1931                         break;
1932                 case E1000_RXBUFFER_16384:
1933                         rctl |= E1000_RCTL_SZ_16384;
1934                         break;
1935         }
1936
1937 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1938         /* 82571 and greater support packet-split where the protocol
1939          * header is placed in skb->data and the packet data is
1940          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1941          * In the case of a non-split, skb->data is linearly filled,
1942          * followed by the page buffers.  Therefore, skb->data is
1943          * sized to hold the largest protocol header.
1944          */
1945         /* allocations using alloc_page take too long for regular MTU
1946          * so only enable packet split for jumbo frames */
1947         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1948         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1949             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1950                 adapter->rx_ps_pages = pages;
1951         else
1952                 adapter->rx_ps_pages = 0;
1953 #endif
1954         if (adapter->rx_ps_pages) {
1955                 /* Configure extra packet-split registers */
1956                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1957                 rfctl |= E1000_RFCTL_EXTEN;
1958                 /* disable packet split support for IPv6 extension headers,
1959                  * because some malformed IPv6 headers can hang the RX */
1960                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1961                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
1962
1963                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1964
1965                 rctl |= E1000_RCTL_DTYP_PS;
1966
1967                 psrctl |= adapter->rx_ps_bsize0 >>
1968                         E1000_PSRCTL_BSIZE0_SHIFT;
1969
1970                 switch (adapter->rx_ps_pages) {
1971                 case 3:
1972                         psrctl |= PAGE_SIZE <<
1973                                 E1000_PSRCTL_BSIZE3_SHIFT;
1974                 case 2:
1975                         psrctl |= PAGE_SIZE <<
1976                                 E1000_PSRCTL_BSIZE2_SHIFT;
1977                 case 1:
1978                         psrctl |= PAGE_SIZE >>
1979                                 E1000_PSRCTL_BSIZE1_SHIFT;
1980                         break;
1981                 }
1982
1983                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1984         }
1985
1986         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1987 }
1988
1989 /**
1990  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1991  * @adapter: board private structure
1992  *
1993  * Configure the Rx unit of the MAC after a reset.
1994  **/
1995
1996 static void
1997 e1000_configure_rx(struct e1000_adapter *adapter)
1998 {
1999         uint64_t rdba;
2000         struct e1000_hw *hw = &adapter->hw;
2001         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2002
2003         if (adapter->rx_ps_pages) {
2004                 /* this is a 32 byte descriptor */
2005                 rdlen = adapter->rx_ring[0].count *
2006                         sizeof(union e1000_rx_desc_packet_split);
2007                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2008                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2009         } else {
2010                 rdlen = adapter->rx_ring[0].count *
2011                         sizeof(struct e1000_rx_desc);
2012                 adapter->clean_rx = e1000_clean_rx_irq;
2013                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2014         }
2015
2016         /* disable receives while setting up the descriptors */
2017         rctl = E1000_READ_REG(hw, RCTL);
2018         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2019
2020         /* set the Receive Delay Timer Register */
2021         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2022
2023         if (hw->mac_type >= e1000_82540) {
2024                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2025                 if (adapter->itr_setting != 0)
2026                         E1000_WRITE_REG(hw, ITR,
2027                                 1000000000 / (adapter->itr * 256));
2028         }
2029
2030         if (hw->mac_type >= e1000_82571) {
2031                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2032                 /* Reset delay timers after every interrupt */
2033                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2034 #ifdef CONFIG_E1000_NAPI
2035                 /* Auto-Mask interrupts upon ICR access */
2036                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2037                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2038 #endif
2039                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2040                 E1000_WRITE_FLUSH(hw);
2041         }
2042
2043         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2044          * the Base and Length of the Rx Descriptor Ring */
2045         switch (adapter->num_rx_queues) {
2046         case 1:
2047         default:
2048                 rdba = adapter->rx_ring[0].dma;
2049                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2050                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2051                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2052                 E1000_WRITE_REG(hw, RDT, 0);
2053                 E1000_WRITE_REG(hw, RDH, 0);
2054                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2055                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2056                 break;
2057         }
2058
2059         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2060         if (hw->mac_type >= e1000_82543) {
2061                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2062                 if (adapter->rx_csum == TRUE) {
2063                         rxcsum |= E1000_RXCSUM_TUOFL;
2064
2065                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2066                          * Must be used in conjunction with packet-split. */
2067                         if ((hw->mac_type >= e1000_82571) &&
2068                             (adapter->rx_ps_pages)) {
2069                                 rxcsum |= E1000_RXCSUM_IPPCSE;
2070                         }
2071                 } else {
2072                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2073                         /* don't need to clear IPPCSE as it defaults to 0 */
2074                 }
2075                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2076         }
2077
2078         /* enable early receives on 82573, only takes effect if using > 2048
2079          * byte total frame size.  for example only for jumbo frames */
2080 #define E1000_ERT_2048 0x100
2081         if (hw->mac_type == e1000_82573)
2082                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2083
2084         /* Enable Receives */
2085         E1000_WRITE_REG(hw, RCTL, rctl);
2086 }
2087
2088 /**
2089  * e1000_free_tx_resources - Free Tx Resources per Queue
2090  * @adapter: board private structure
2091  * @tx_ring: Tx descriptor ring for a specific queue
2092  *
2093  * Free all transmit software resources
2094  **/
2095
2096 static void
2097 e1000_free_tx_resources(struct e1000_adapter *adapter,
2098                         struct e1000_tx_ring *tx_ring)
2099 {
2100         struct pci_dev *pdev = adapter->pdev;
2101
2102         e1000_clean_tx_ring(adapter, tx_ring);
2103
2104         vfree(tx_ring->buffer_info);
2105         tx_ring->buffer_info = NULL;
2106
2107         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2108
2109         tx_ring->desc = NULL;
2110 }
2111
2112 /**
2113  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2114  * @adapter: board private structure
2115  *
2116  * Free all transmit software resources
2117  **/
2118
2119 void
2120 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2121 {
2122         int i;
2123
2124         for (i = 0; i < adapter->num_tx_queues; i++)
2125                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2126 }
2127
2128 static void
2129 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2130                         struct e1000_buffer *buffer_info)
2131 {
2132         if (buffer_info->dma) {
2133                 pci_unmap_page(adapter->pdev,
2134                                 buffer_info->dma,
2135                                 buffer_info->length,
2136                                 PCI_DMA_TODEVICE);
2137                 buffer_info->dma = 0;
2138         }
2139         if (buffer_info->skb) {
2140                 dev_kfree_skb_any(buffer_info->skb);
2141                 buffer_info->skb = NULL;
2142         }
2143         /* buffer_info must be completely set up in the transmit path */
2144 }
2145
2146 /**
2147  * e1000_clean_tx_ring - Free Tx Buffers
2148  * @adapter: board private structure
2149  * @tx_ring: ring to be cleaned
2150  **/
2151
2152 static void
2153 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2154                     struct e1000_tx_ring *tx_ring)
2155 {
2156         struct e1000_buffer *buffer_info;
2157         unsigned long size;
2158         unsigned int i;
2159
2160         /* Free all the Tx ring sk_buffs */
2161
2162         for (i = 0; i < tx_ring->count; i++) {
2163                 buffer_info = &tx_ring->buffer_info[i];
2164                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2165         }
2166
2167         size = sizeof(struct e1000_buffer) * tx_ring->count;
2168         memset(tx_ring->buffer_info, 0, size);
2169
2170         /* Zero out the descriptor ring */
2171
2172         memset(tx_ring->desc, 0, tx_ring->size);
2173
2174         tx_ring->next_to_use = 0;
2175         tx_ring->next_to_clean = 0;
2176         tx_ring->last_tx_tso = 0;
2177
2178         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2179         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2180 }
2181
2182 /**
2183  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2184  * @adapter: board private structure
2185  **/
2186
2187 static void
2188 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2189 {
2190         int i;
2191
2192         for (i = 0; i < adapter->num_tx_queues; i++)
2193                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2194 }
2195
2196 /**
2197  * e1000_free_rx_resources - Free Rx Resources
2198  * @adapter: board private structure
2199  * @rx_ring: ring to clean the resources from
2200  *
2201  * Free all receive software resources
2202  **/
2203
2204 static void
2205 e1000_free_rx_resources(struct e1000_adapter *adapter,
2206                         struct e1000_rx_ring *rx_ring)
2207 {
2208         struct pci_dev *pdev = adapter->pdev;
2209
2210         e1000_clean_rx_ring(adapter, rx_ring);
2211
2212         vfree(rx_ring->buffer_info);
2213         rx_ring->buffer_info = NULL;
2214         kfree(rx_ring->ps_page);
2215         rx_ring->ps_page = NULL;
2216         kfree(rx_ring->ps_page_dma);
2217         rx_ring->ps_page_dma = NULL;
2218
2219         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2220
2221         rx_ring->desc = NULL;
2222 }
2223
2224 /**
2225  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2226  * @adapter: board private structure
2227  *
2228  * Free all receive software resources
2229  **/
2230
2231 void
2232 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2233 {
2234         int i;
2235
2236         for (i = 0; i < adapter->num_rx_queues; i++)
2237                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2238 }
2239
2240 /**
2241  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2242  * @adapter: board private structure
2243  * @rx_ring: ring to free buffers from
2244  **/
2245
2246 static void
2247 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2248                     struct e1000_rx_ring *rx_ring)
2249 {
2250         struct e1000_buffer *buffer_info;
2251         struct e1000_ps_page *ps_page;
2252         struct e1000_ps_page_dma *ps_page_dma;
2253         struct pci_dev *pdev = adapter->pdev;
2254         unsigned long size;
2255         unsigned int i, j;
2256
2257         /* Free all the Rx ring sk_buffs */
2258         for (i = 0; i < rx_ring->count; i++) {
2259                 buffer_info = &rx_ring->buffer_info[i];
2260                 if (buffer_info->skb) {
2261                         pci_unmap_single(pdev,
2262                                          buffer_info->dma,
2263                                          buffer_info->length,
2264                                          PCI_DMA_FROMDEVICE);
2265
2266                         dev_kfree_skb(buffer_info->skb);
2267                         buffer_info->skb = NULL;
2268                 }
2269                 ps_page = &rx_ring->ps_page[i];
2270                 ps_page_dma = &rx_ring->ps_page_dma[i];
2271                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2272                         if (!ps_page->ps_page[j]) break;
2273                         pci_unmap_page(pdev,
2274                                        ps_page_dma->ps_page_dma[j],
2275                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2276                         ps_page_dma->ps_page_dma[j] = 0;
2277                         put_page(ps_page->ps_page[j]);
2278                         ps_page->ps_page[j] = NULL;
2279                 }
2280         }
2281
2282         size = sizeof(struct e1000_buffer) * rx_ring->count;
2283         memset(rx_ring->buffer_info, 0, size);
2284         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2285         memset(rx_ring->ps_page, 0, size);
2286         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2287         memset(rx_ring->ps_page_dma, 0, size);
2288
2289         /* Zero out the descriptor ring */
2290
2291         memset(rx_ring->desc, 0, rx_ring->size);
2292
2293         rx_ring->next_to_clean = 0;
2294         rx_ring->next_to_use = 0;
2295
2296         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2297         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2298 }
2299
2300 /**
2301  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2302  * @adapter: board private structure
2303  **/
2304
2305 static void
2306 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2307 {
2308         int i;
2309
2310         for (i = 0; i < adapter->num_rx_queues; i++)
2311                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2312 }
2313
2314 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2315  * and memory write and invalidate disabled for certain operations
2316  */
2317 static void
2318 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2319 {
2320         struct net_device *netdev = adapter->netdev;
2321         uint32_t rctl;
2322
2323         e1000_pci_clear_mwi(&adapter->hw);
2324
2325         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2326         rctl |= E1000_RCTL_RST;
2327         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2328         E1000_WRITE_FLUSH(&adapter->hw);
2329         mdelay(5);
2330
2331         if (netif_running(netdev))
2332                 e1000_clean_all_rx_rings(adapter);
2333 }
2334
2335 static void
2336 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2337 {
2338         struct net_device *netdev = adapter->netdev;
2339         uint32_t rctl;
2340
2341         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2342         rctl &= ~E1000_RCTL_RST;
2343         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2344         E1000_WRITE_FLUSH(&adapter->hw);
2345         mdelay(5);
2346
2347         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2348                 e1000_pci_set_mwi(&adapter->hw);
2349
2350         if (netif_running(netdev)) {
2351                 /* No need to loop, because 82542 supports only 1 queue */
2352                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2353                 e1000_configure_rx(adapter);
2354                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2355         }
2356 }
2357
2358 /**
2359  * e1000_set_mac - Change the Ethernet Address of the NIC
2360  * @netdev: network interface device structure
2361  * @p: pointer to an address structure
2362  *
2363  * Returns 0 on success, negative on failure
2364  **/
2365
2366 static int
2367 e1000_set_mac(struct net_device *netdev, void *p)
2368 {
2369         struct e1000_adapter *adapter = netdev_priv(netdev);
2370         struct sockaddr *addr = p;
2371
2372         if (!is_valid_ether_addr(addr->sa_data))
2373                 return -EADDRNOTAVAIL;
2374
2375         /* 82542 2.0 needs to be in reset to write receive address registers */
2376
2377         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2378                 e1000_enter_82542_rst(adapter);
2379
2380         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2381         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2382
2383         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2384
2385         /* With 82571 controllers, LAA may be overwritten (with the default)
2386          * due to controller reset from the other port. */
2387         if (adapter->hw.mac_type == e1000_82571) {
2388                 /* activate the work around */
2389                 adapter->hw.laa_is_present = 1;
2390
2391                 /* Hold a copy of the LAA in RAR[14] This is done so that
2392                  * between the time RAR[0] gets clobbered  and the time it
2393                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2394                  * of the RARs and no incoming packets directed to this port
2395                  * are dropped. Eventaully the LAA will be in RAR[0] and
2396                  * RAR[14] */
2397                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2398                                         E1000_RAR_ENTRIES - 1);
2399         }
2400
2401         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2402                 e1000_leave_82542_rst(adapter);
2403
2404         return 0;
2405 }
2406
2407 /**
2408  * e1000_set_multi - Multicast and Promiscuous mode set
2409  * @netdev: network interface device structure
2410  *
2411  * The set_multi entry point is called whenever the multicast address
2412  * list or the network interface flags are updated.  This routine is
2413  * responsible for configuring the hardware for proper multicast,
2414  * promiscuous mode, and all-multi behavior.
2415  **/
2416
2417 static void
2418 e1000_set_multi(struct net_device *netdev)
2419 {
2420         struct e1000_adapter *adapter = netdev_priv(netdev);
2421         struct e1000_hw *hw = &adapter->hw;
2422         struct dev_mc_list *mc_ptr;
2423         uint32_t rctl;
2424         uint32_t hash_value;
2425         int i, rar_entries = E1000_RAR_ENTRIES;
2426         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2427                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2428                                 E1000_NUM_MTA_REGISTERS;
2429
2430         if (adapter->hw.mac_type == e1000_ich8lan)
2431                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2432
2433         /* reserve RAR[14] for LAA over-write work-around */
2434         if (adapter->hw.mac_type == e1000_82571)
2435                 rar_entries--;
2436
2437         /* Check for Promiscuous and All Multicast modes */
2438
2439         rctl = E1000_READ_REG(hw, RCTL);
2440
2441         if (netdev->flags & IFF_PROMISC) {
2442                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2443         } else if (netdev->flags & IFF_ALLMULTI) {
2444                 rctl |= E1000_RCTL_MPE;
2445                 rctl &= ~E1000_RCTL_UPE;
2446         } else {
2447                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2448         }
2449
2450         E1000_WRITE_REG(hw, RCTL, rctl);
2451
2452         /* 82542 2.0 needs to be in reset to write receive address registers */
2453
2454         if (hw->mac_type == e1000_82542_rev2_0)
2455                 e1000_enter_82542_rst(adapter);
2456
2457         /* load the first 14 multicast address into the exact filters 1-14
2458          * RAR 0 is used for the station MAC adddress
2459          * if there are not 14 addresses, go ahead and clear the filters
2460          * -- with 82571 controllers only 0-13 entries are filled here
2461          */
2462         mc_ptr = netdev->mc_list;
2463
2464         for (i = 1; i < rar_entries; i++) {
2465                 if (mc_ptr) {
2466                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2467                         mc_ptr = mc_ptr->next;
2468                 } else {
2469                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2470                         E1000_WRITE_FLUSH(hw);
2471                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2472                         E1000_WRITE_FLUSH(hw);
2473                 }
2474         }
2475
2476         /* clear the old settings from the multicast hash table */
2477
2478         for (i = 0; i < mta_reg_count; i++) {
2479                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2480                 E1000_WRITE_FLUSH(hw);
2481         }
2482
2483         /* load any remaining addresses into the hash table */
2484
2485         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2486                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2487                 e1000_mta_set(hw, hash_value);
2488         }
2489
2490         if (hw->mac_type == e1000_82542_rev2_0)
2491                 e1000_leave_82542_rst(adapter);
2492 }
2493
2494 /* Need to wait a few seconds after link up to get diagnostic information from
2495  * the phy */
2496
2497 static void
2498 e1000_update_phy_info(unsigned long data)
2499 {
2500         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2501         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2502 }
2503
2504 /**
2505  * e1000_82547_tx_fifo_stall - Timer Call-back
2506  * @data: pointer to adapter cast into an unsigned long
2507  **/
2508
2509 static void
2510 e1000_82547_tx_fifo_stall(unsigned long data)
2511 {
2512         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2513         struct net_device *netdev = adapter->netdev;
2514         uint32_t tctl;
2515
2516         if (atomic_read(&adapter->tx_fifo_stall)) {
2517                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2518                     E1000_READ_REG(&adapter->hw, TDH)) &&
2519                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2520                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2521                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2522                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2523                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2524                         E1000_WRITE_REG(&adapter->hw, TCTL,
2525                                         tctl & ~E1000_TCTL_EN);
2526                         E1000_WRITE_REG(&adapter->hw, TDFT,
2527                                         adapter->tx_head_addr);
2528                         E1000_WRITE_REG(&adapter->hw, TDFH,
2529                                         adapter->tx_head_addr);
2530                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2531                                         adapter->tx_head_addr);
2532                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2533                                         adapter->tx_head_addr);
2534                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2535                         E1000_WRITE_FLUSH(&adapter->hw);
2536
2537                         adapter->tx_fifo_head = 0;
2538                         atomic_set(&adapter->tx_fifo_stall, 0);
2539                         netif_wake_queue(netdev);
2540                 } else {
2541                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2542                 }
2543         }
2544 }
2545
2546 /**
2547  * e1000_watchdog - Timer Call-back
2548  * @data: pointer to adapter cast into an unsigned long
2549  **/
2550 static void
2551 e1000_watchdog(unsigned long data)
2552 {
2553         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2554         struct net_device *netdev = adapter->netdev;
2555         struct e1000_tx_ring *txdr = adapter->tx_ring;
2556         uint32_t link, tctl;
2557         int32_t ret_val;
2558
2559         ret_val = e1000_check_for_link(&adapter->hw);
2560         if ((ret_val == E1000_ERR_PHY) &&
2561             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2562             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2563                 /* See e1000_kumeran_lock_loss_workaround() */
2564                 DPRINTK(LINK, INFO,
2565                         "Gigabit has been disabled, downgrading speed\n");
2566         }
2567
2568         if (adapter->hw.mac_type == e1000_82573) {
2569                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2570                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2571                         e1000_update_mng_vlan(adapter);
2572         }
2573
2574         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2575            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2576                 link = !adapter->hw.serdes_link_down;
2577         else
2578                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2579
2580         if (link) {
2581                 if (!netif_carrier_ok(netdev)) {
2582                         uint32_t ctrl;
2583                         boolean_t txb2b = 1;
2584                         e1000_get_speed_and_duplex(&adapter->hw,
2585                                                    &adapter->link_speed,
2586                                                    &adapter->link_duplex);
2587
2588                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2589                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2590                                 "Flow Control: %s\n",
2591                                 adapter->link_speed,
2592                                 adapter->link_duplex == FULL_DUPLEX ?
2593                                 "Full Duplex" : "Half Duplex",
2594                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2595                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2596                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2597                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2598
2599                         /* tweak tx_queue_len according to speed/duplex
2600                          * and adjust the timeout factor */
2601                         netdev->tx_queue_len = adapter->tx_queue_len;
2602                         adapter->tx_timeout_factor = 1;
2603                         switch (adapter->link_speed) {
2604                         case SPEED_10:
2605                                 txb2b = 0;
2606                                 netdev->tx_queue_len = 10;
2607                                 adapter->tx_timeout_factor = 8;
2608                                 break;
2609                         case SPEED_100:
2610                                 txb2b = 0;
2611                                 netdev->tx_queue_len = 100;
2612                                 /* maybe add some timeout factor ? */
2613                                 break;
2614                         }
2615
2616                         if ((adapter->hw.mac_type == e1000_82571 ||
2617                              adapter->hw.mac_type == e1000_82572) &&
2618                             txb2b == 0) {
2619                                 uint32_t tarc0;
2620                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2621                                 tarc0 &= ~(1 << 21);
2622                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2623                         }
2624
2625                         /* disable TSO for pcie and 10/100 speeds, to avoid
2626                          * some hardware issues */
2627                         if (!adapter->tso_force &&
2628                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2629                                 switch (adapter->link_speed) {
2630                                 case SPEED_10:
2631                                 case SPEED_100:
2632                                         DPRINTK(PROBE,INFO,
2633                                         "10/100 speed: disabling TSO\n");
2634                                         netdev->features &= ~NETIF_F_TSO;
2635                                         netdev->features &= ~NETIF_F_TSO6;
2636                                         break;
2637                                 case SPEED_1000:
2638                                         netdev->features |= NETIF_F_TSO;
2639                                         netdev->features |= NETIF_F_TSO6;
2640                                         break;
2641                                 default:
2642                                         /* oops */
2643                                         break;
2644                                 }
2645                         }
2646
2647                         /* enable transmits in the hardware, need to do this
2648                          * after setting TARC0 */
2649                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2650                         tctl |= E1000_TCTL_EN;
2651                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2652
2653                         netif_carrier_on(netdev);
2654                         netif_wake_queue(netdev);
2655                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2656                         adapter->smartspeed = 0;
2657                 } else {
2658                         /* make sure the receive unit is started */
2659                         if (adapter->hw.rx_needs_kicking) {
2660                                 struct e1000_hw *hw = &adapter->hw;
2661                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2662                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2663                         }
2664                 }
2665         } else {
2666                 if (netif_carrier_ok(netdev)) {
2667                         adapter->link_speed = 0;
2668                         adapter->link_duplex = 0;
2669                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2670                         netif_carrier_off(netdev);
2671                         netif_stop_queue(netdev);
2672                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2673
2674                         /* 80003ES2LAN workaround--
2675                          * For packet buffer work-around on link down event;
2676                          * disable receives in the ISR and
2677                          * reset device here in the watchdog
2678                          */
2679                         if (adapter->hw.mac_type == e1000_80003es2lan)
2680                                 /* reset device */
2681                                 schedule_work(&adapter->reset_task);
2682                 }
2683
2684                 e1000_smartspeed(adapter);
2685         }
2686
2687         e1000_update_stats(adapter);
2688
2689         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2690         adapter->tpt_old = adapter->stats.tpt;
2691         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2692         adapter->colc_old = adapter->stats.colc;
2693
2694         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2695         adapter->gorcl_old = adapter->stats.gorcl;
2696         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2697         adapter->gotcl_old = adapter->stats.gotcl;
2698
2699         e1000_update_adaptive(&adapter->hw);
2700
2701         if (!netif_carrier_ok(netdev)) {
2702                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2703                         /* We've lost link, so the controller stops DMA,
2704                          * but we've got queued Tx work that's never going
2705                          * to get done, so reset controller to flush Tx.
2706                          * (Do the reset outside of interrupt context). */
2707                         adapter->tx_timeout_count++;
2708                         schedule_work(&adapter->reset_task);
2709                 }
2710         }
2711
2712         /* Cause software interrupt to ensure rx ring is cleaned */
2713         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2714
2715         /* Force detection of hung controller every watchdog period */
2716         adapter->detect_tx_hung = TRUE;
2717
2718         /* With 82571 controllers, LAA may be overwritten due to controller
2719          * reset from the other port. Set the appropriate LAA in RAR[0] */
2720         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2721                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2722
2723         /* Reset the timer */
2724         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2725 }
2726
2727 enum latency_range {
2728         lowest_latency = 0,
2729         low_latency = 1,
2730         bulk_latency = 2,
2731         latency_invalid = 255
2732 };
2733
2734 /**
2735  * e1000_update_itr - update the dynamic ITR value based on statistics
2736  *      Stores a new ITR value based on packets and byte
2737  *      counts during the last interrupt.  The advantage of per interrupt
2738  *      computation is faster updates and more accurate ITR for the current
2739  *      traffic pattern.  Constants in this function were computed
2740  *      based on theoretical maximum wire speed and thresholds were set based
2741  *      on testing data as well as attempting to minimize response time
2742  *      while increasing bulk throughput.
2743  *      this functionality is controlled by the InterruptThrottleRate module
2744  *      parameter (see e1000_param.c)
2745  * @adapter: pointer to adapter
2746  * @itr_setting: current adapter->itr
2747  * @packets: the number of packets during this measurement interval
2748  * @bytes: the number of bytes during this measurement interval
2749  **/
2750 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2751                                    uint16_t itr_setting,
2752                                    int packets,
2753                                    int bytes)
2754 {
2755         unsigned int retval = itr_setting;
2756         struct e1000_hw *hw = &adapter->hw;
2757
2758         if (unlikely(hw->mac_type < e1000_82540))
2759                 goto update_itr_done;
2760
2761         if (packets == 0)
2762                 goto update_itr_done;
2763
2764         switch (itr_setting) {
2765         case lowest_latency:
2766                 /* jumbo frames get bulk treatment*/
2767                 if (bytes/packets > 8000)
2768                         retval = bulk_latency;
2769                 else if ((packets < 5) && (bytes > 512))
2770                         retval = low_latency;
2771                 break;
2772         case low_latency:  /* 50 usec aka 20000 ints/s */
2773                 if (bytes > 10000) {
2774                         /* jumbo frames need bulk latency setting */
2775                         if (bytes/packets > 8000)
2776                                 retval = bulk_latency;
2777                         else if ((packets < 10) || ((bytes/packets) > 1200))
2778                                 retval = bulk_latency;
2779                         else if ((packets > 35))
2780                                 retval = lowest_latency;
2781                 } else if (bytes/packets > 2000)
2782                         retval = bulk_latency;
2783                 else if (packets <= 2 && bytes < 512)
2784                         retval = lowest_latency;
2785                 break;
2786         case bulk_latency: /* 250 usec aka 4000 ints/s */
2787                 if (bytes > 25000) {
2788                         if (packets > 35)
2789                                 retval = low_latency;
2790                 } else if (bytes < 6000) {
2791                         retval = low_latency;
2792                 }
2793                 break;
2794         }
2795
2796 update_itr_done:
2797         return retval;
2798 }
2799
2800 static void e1000_set_itr(struct e1000_adapter *adapter)
2801 {
2802         struct e1000_hw *hw = &adapter->hw;
2803         uint16_t current_itr;
2804         uint32_t new_itr = adapter->itr;
2805
2806         if (unlikely(hw->mac_type < e1000_82540))
2807                 return;
2808
2809         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2810         if (unlikely(adapter->link_speed != SPEED_1000)) {
2811                 current_itr = 0;
2812                 new_itr = 4000;
2813                 goto set_itr_now;
2814         }
2815
2816         adapter->tx_itr = e1000_update_itr(adapter,
2817                                     adapter->tx_itr,
2818                                     adapter->total_tx_packets,
2819                                     adapter->total_tx_bytes);
2820         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2821         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2822                 adapter->tx_itr = low_latency;
2823
2824         adapter->rx_itr = e1000_update_itr(adapter,
2825                                     adapter->rx_itr,
2826                                     adapter->total_rx_packets,
2827                                     adapter->total_rx_bytes);
2828         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2829         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2830                 adapter->rx_itr = low_latency;
2831
2832         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2833
2834         switch (current_itr) {
2835         /* counts and packets in update_itr are dependent on these numbers */
2836         case lowest_latency:
2837                 new_itr = 70000;
2838                 break;
2839         case low_latency:
2840                 new_itr = 20000; /* aka hwitr = ~200 */
2841                 break;
2842         case bulk_latency:
2843                 new_itr = 4000;
2844                 break;
2845         default:
2846                 break;
2847         }
2848
2849 set_itr_now:
2850         if (new_itr != adapter->itr) {
2851                 /* this attempts to bias the interrupt rate towards Bulk
2852                  * by adding intermediate steps when interrupt rate is
2853                  * increasing */
2854                 new_itr = new_itr > adapter->itr ?
2855                              min(adapter->itr + (new_itr >> 2), new_itr) :
2856                              new_itr;
2857                 adapter->itr = new_itr;
2858                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2859         }
2860
2861         return;
2862 }
2863
2864 #define E1000_TX_FLAGS_CSUM             0x00000001
2865 #define E1000_TX_FLAGS_VLAN             0x00000002
2866 #define E1000_TX_FLAGS_TSO              0x00000004
2867 #define E1000_TX_FLAGS_IPV4             0x00000008
2868 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2869 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2870
2871 static int
2872 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2873           struct sk_buff *skb)
2874 {
2875         struct e1000_context_desc *context_desc;
2876         struct e1000_buffer *buffer_info;
2877         unsigned int i;
2878         uint32_t cmd_length = 0;
2879         uint16_t ipcse = 0, tucse, mss;
2880         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2881         int err;
2882
2883         if (skb_is_gso(skb)) {
2884                 if (skb_header_cloned(skb)) {
2885                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2886                         if (err)
2887                                 return err;
2888                 }
2889
2890                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2891                 mss = skb_shinfo(skb)->gso_size;
2892                 if (skb->protocol == htons(ETH_P_IP)) {
2893                         struct iphdr *iph = ip_hdr(skb);
2894                         iph->tot_len = 0;
2895                         iph->check = 0;
2896                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2897                                                                  iph->daddr, 0,
2898                                                                  IPPROTO_TCP,
2899                                                                  0);
2900                         cmd_length = E1000_TXD_CMD_IP;
2901                         ipcse = skb_transport_offset(skb) - 1;
2902                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2903                         ipv6_hdr(skb)->payload_len = 0;
2904                         tcp_hdr(skb)->check =
2905                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2906                                                  &ipv6_hdr(skb)->daddr,
2907                                                  0, IPPROTO_TCP, 0);
2908                         ipcse = 0;
2909                 }
2910                 ipcss = skb_network_offset(skb);
2911                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2912                 tucss = skb_transport_offset(skb);
2913                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2914                 tucse = 0;
2915
2916                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2917                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2918
2919                 i = tx_ring->next_to_use;
2920                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2921                 buffer_info = &tx_ring->buffer_info[i];
2922
2923                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2924                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2925                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2926                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2927                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2928                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2929                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2930                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2931                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2932
2933                 buffer_info->time_stamp = jiffies;
2934                 buffer_info->next_to_watch = i;
2935
2936                 if (++i == tx_ring->count) i = 0;
2937                 tx_ring->next_to_use = i;
2938
2939                 return TRUE;
2940         }
2941         return FALSE;
2942 }
2943
2944 static boolean_t
2945 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2946               struct sk_buff *skb)
2947 {
2948         struct e1000_context_desc *context_desc;
2949         struct e1000_buffer *buffer_info;
2950         unsigned int i;
2951         uint8_t css;
2952
2953         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2954                 css = skb_transport_offset(skb);
2955
2956                 i = tx_ring->next_to_use;
2957                 buffer_info = &tx_ring->buffer_info[i];
2958                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2959
2960                 context_desc->lower_setup.ip_config = 0;
2961                 context_desc->upper_setup.tcp_fields.tucss = css;
2962                 context_desc->upper_setup.tcp_fields.tucso =
2963                         css + skb->csum_offset;
2964                 context_desc->upper_setup.tcp_fields.tucse = 0;
2965                 context_desc->tcp_seg_setup.data = 0;
2966                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2967
2968                 buffer_info->time_stamp = jiffies;
2969                 buffer_info->next_to_watch = i;
2970
2971                 if (unlikely(++i == tx_ring->count)) i = 0;
2972                 tx_ring->next_to_use = i;
2973
2974                 return TRUE;
2975         }
2976
2977         return FALSE;
2978 }
2979
2980 #define E1000_MAX_TXD_PWR       12
2981 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2982
2983 static int
2984 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2985              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2986              unsigned int nr_frags, unsigned int mss)
2987 {
2988         struct e1000_buffer *buffer_info;
2989         unsigned int len = skb->len;
2990         unsigned int offset = 0, size, count = 0, i;
2991         unsigned int f;
2992         len -= skb->data_len;
2993
2994         i = tx_ring->next_to_use;
2995
2996         while (len) {
2997                 buffer_info = &tx_ring->buffer_info[i];
2998                 size = min(len, max_per_txd);
2999                 /* Workaround for Controller erratum --
3000                  * descriptor for non-tso packet in a linear SKB that follows a
3001                  * tso gets written back prematurely before the data is fully
3002                  * DMA'd to the controller */
3003                 if (!skb->data_len && tx_ring->last_tx_tso &&
3004                     !skb_is_gso(skb)) {
3005                         tx_ring->last_tx_tso = 0;
3006                         size -= 4;
3007                 }
3008
3009                 /* Workaround for premature desc write-backs
3010                  * in TSO mode.  Append 4-byte sentinel desc */
3011                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3012                         size -= 4;
3013                 /* work-around for errata 10 and it applies
3014                  * to all controllers in PCI-X mode
3015                  * The fix is to make sure that the first descriptor of a
3016                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3017                  */
3018                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3019                                 (size > 2015) && count == 0))
3020                         size = 2015;
3021
3022                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3023                  * terminating buffers within evenly-aligned dwords. */
3024                 if (unlikely(adapter->pcix_82544 &&
3025                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3026                    size > 4))
3027                         size -= 4;
3028
3029                 buffer_info->length = size;
3030                 buffer_info->dma =
3031                         pci_map_single(adapter->pdev,
3032                                 skb->data + offset,
3033                                 size,
3034                                 PCI_DMA_TODEVICE);
3035                 buffer_info->time_stamp = jiffies;
3036                 buffer_info->next_to_watch = i;
3037
3038                 len -= size;
3039                 offset += size;
3040                 count++;
3041                 if (unlikely(++i == tx_ring->count)) i = 0;
3042         }
3043
3044         for (f = 0; f < nr_frags; f++) {
3045                 struct skb_frag_struct *frag;
3046
3047                 frag = &skb_shinfo(skb)->frags[f];
3048                 len = frag->size;
3049                 offset = frag->page_offset;
3050
3051                 while (len) {
3052                         buffer_info = &tx_ring->buffer_info[i];
3053                         size = min(len, max_per_txd);
3054                         /* Workaround for premature desc write-backs
3055                          * in TSO mode.  Append 4-byte sentinel desc */
3056                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3057                                 size -= 4;
3058                         /* Workaround for potential 82544 hang in PCI-X.
3059                          * Avoid terminating buffers within evenly-aligned
3060                          * dwords. */
3061                         if (unlikely(adapter->pcix_82544 &&
3062                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3063                            size > 4))
3064                                 size -= 4;
3065
3066                         buffer_info->length = size;
3067                         buffer_info->dma =
3068                                 pci_map_page(adapter->pdev,
3069                                         frag->page,
3070                                         offset,
3071                                         size,
3072                                         PCI_DMA_TODEVICE);
3073                         buffer_info->time_stamp = jiffies;
3074                         buffer_info->next_to_watch = i;
3075
3076                         len -= size;
3077                         offset += size;
3078                         count++;
3079                         if (unlikely(++i == tx_ring->count)) i = 0;
3080                 }
3081         }
3082
3083         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3084         tx_ring->buffer_info[i].skb = skb;
3085         tx_ring->buffer_info[first].next_to_watch = i;
3086
3087         return count;
3088 }
3089
3090 static void
3091 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3092                int tx_flags, int count)
3093 {
3094         struct e1000_tx_desc *tx_desc = NULL;
3095         struct e1000_buffer *buffer_info;
3096         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3097         unsigned int i;
3098
3099         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3100                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3101                              E1000_TXD_CMD_TSE;
3102                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3103
3104                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3105                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3106         }
3107
3108         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3109                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3110                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3111         }
3112
3113         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3114                 txd_lower |= E1000_TXD_CMD_VLE;
3115                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3116         }
3117
3118         i = tx_ring->next_to_use;
3119
3120         while (count--) {
3121                 buffer_info = &tx_ring->buffer_info[i];
3122                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3123                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3124                 tx_desc->lower.data =
3125                         cpu_to_le32(txd_lower | buffer_info->length);
3126                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3127                 if (unlikely(++i == tx_ring->count)) i = 0;
3128         }
3129
3130         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3131
3132         /* Force memory writes to complete before letting h/w
3133          * know there are new descriptors to fetch.  (Only
3134          * applicable for weak-ordered memory model archs,
3135          * such as IA-64). */
3136         wmb();
3137
3138         tx_ring->next_to_use = i;
3139         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3140         /* we need this if more than one processor can write to our tail
3141          * at a time, it syncronizes IO on IA64/Altix systems */
3142         mmiowb();
3143 }
3144
3145 /**
3146  * 82547 workaround to avoid controller hang in half-duplex environment.
3147  * The workaround is to avoid queuing a large packet that would span
3148  * the internal Tx FIFO ring boundary by notifying the stack to resend
3149  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3150  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3151  * to the beginning of the Tx FIFO.
3152  **/
3153
3154 #define E1000_FIFO_HDR                  0x10
3155 #define E1000_82547_PAD_LEN             0x3E0
3156
3157 static int
3158 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3159 {
3160         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3161         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3162
3163         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
3164
3165         if (adapter->link_duplex != HALF_DUPLEX)
3166                 goto no_fifo_stall_required;
3167
3168         if (atomic_read(&adapter->tx_fifo_stall))
3169                 return 1;
3170
3171         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3172                 atomic_set(&adapter->tx_fifo_stall, 1);
3173                 return 1;
3174         }
3175
3176 no_fifo_stall_required:
3177         adapter->tx_fifo_head += skb_fifo_len;
3178         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3179                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3180         return 0;
3181 }
3182
3183 #define MINIMUM_DHCP_PACKET_SIZE 282
3184 static int
3185 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3186 {
3187         struct e1000_hw *hw =  &adapter->hw;
3188         uint16_t length, offset;
3189         if (vlan_tx_tag_present(skb)) {
3190                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3191                         ( adapter->hw.mng_cookie.status &
3192                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3193                         return 0;
3194         }
3195         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3196                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3197                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3198                         const struct iphdr *ip =
3199                                 (struct iphdr *)((uint8_t *)skb->data+14);
3200                         if (IPPROTO_UDP == ip->protocol) {
3201                                 struct udphdr *udp =
3202                                         (struct udphdr *)((uint8_t *)ip +
3203                                                 (ip->ihl << 2));
3204                                 if (ntohs(udp->dest) == 67) {
3205                                         offset = (uint8_t *)udp + 8 - skb->data;
3206                                         length = skb->len - offset;
3207
3208                                         return e1000_mng_write_dhcp_info(hw,
3209                                                         (uint8_t *)udp + 8,
3210                                                         length);
3211                                 }
3212                         }
3213                 }
3214         }
3215         return 0;
3216 }
3217
3218 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3219 {
3220         struct e1000_adapter *adapter = netdev_priv(netdev);
3221         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3222
3223         netif_stop_queue(netdev);
3224         /* Herbert's original patch had:
3225          *  smp_mb__after_netif_stop_queue();
3226          * but since that doesn't exist yet, just open code it. */
3227         smp_mb();
3228
3229         /* We need to check again in a case another CPU has just
3230          * made room available. */
3231         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3232                 return -EBUSY;
3233
3234         /* A reprieve! */
3235         netif_start_queue(netdev);
3236         ++adapter->restart_queue;
3237         return 0;
3238 }
3239
3240 static int e1000_maybe_stop_tx(struct net_device *netdev,
3241                                struct e1000_tx_ring *tx_ring, int size)
3242 {
3243         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3244                 return 0;
3245         return __e1000_maybe_stop_tx(netdev, size);
3246 }
3247
3248 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3249 static int
3250 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3251 {
3252         struct e1000_adapter *adapter = netdev_priv(netdev);
3253         struct e1000_tx_ring *tx_ring;
3254         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3255         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3256         unsigned int tx_flags = 0;
3257         unsigned int len = skb->len;
3258         unsigned long flags;
3259         unsigned int nr_frags = 0;
3260         unsigned int mss = 0;
3261         int count = 0;
3262         int tso;
3263         unsigned int f;
3264         len -= skb->data_len;
3265
3266         /* This goes back to the question of how to logically map a tx queue
3267          * to a flow.  Right now, performance is impacted slightly negatively
3268          * if using multiple tx queues.  If the stack breaks away from a
3269          * single qdisc implementation, we can look at this again. */
3270         tx_ring = adapter->tx_ring;
3271
3272         if (unlikely(skb->len <= 0)) {
3273                 dev_kfree_skb_any(skb);
3274                 return NETDEV_TX_OK;
3275         }
3276
3277         /* 82571 and newer doesn't need the workaround that limited descriptor
3278          * length to 4kB */
3279         if (adapter->hw.mac_type >= e1000_82571)
3280                 max_per_txd = 8192;
3281
3282         mss = skb_shinfo(skb)->gso_size;
3283         /* The controller does a simple calculation to
3284          * make sure there is enough room in the FIFO before
3285          * initiating the DMA for each buffer.  The calc is:
3286          * 4 = ceil(buffer len/mss).  To make sure we don't
3287          * overrun the FIFO, adjust the max buffer len if mss
3288          * drops. */
3289         if (mss) {
3290                 uint8_t hdr_len;
3291                 max_per_txd = min(mss << 2, max_per_txd);
3292                 max_txd_pwr = fls(max_per_txd) - 1;
3293
3294                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3295                 * points to just header, pull a few bytes of payload from
3296                 * frags into skb->data */
3297                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3298                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
3299                         switch (adapter->hw.mac_type) {
3300                                 unsigned int pull_size;
3301                         case e1000_82544:
3302                                 /* Make sure we have room to chop off 4 bytes,
3303                                  * and that the end alignment will work out to
3304                                  * this hardware's requirements
3305                                  * NOTE: this is a TSO only workaround
3306                                  * if end byte alignment not correct move us
3307                                  * into the next dword */
3308                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3309                                         break;
3310                                 /* fall through */
3311                         case e1000_82571:
3312                         case e1000_82572:
3313                         case e1000_82573:
3314                         case e1000_ich8lan:
3315                                 pull_size = min((unsigned int)4, skb->data_len);
3316                                 if (!__pskb_pull_tail(skb, pull_size)) {
3317                                         DPRINTK(DRV, ERR,
3318                                                 "__pskb_pull_tail failed.\n");
3319                                         dev_kfree_skb_any(skb);
3320                                         return NETDEV_TX_OK;
3321                                 }
3322                                 len = skb->len - skb->data_len;
3323                                 break;
3324                         default:
3325                                 /* do nothing */
3326                                 break;
3327                         }
3328                 }
3329         }
3330
3331         /* reserve a descriptor for the offload context */
3332         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3333                 count++;
3334         count++;
3335
3336         /* Controller Erratum workaround */
3337         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3338                 count++;
3339
3340         count += TXD_USE_COUNT(len, max_txd_pwr);
3341
3342         if (adapter->pcix_82544)
3343                 count++;
3344
3345         /* work-around for errata 10 and it applies to all controllers
3346          * in PCI-X mode, so add one more descriptor to the count
3347          */
3348         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3349                         (len > 2015)))
3350                 count++;
3351
3352         nr_frags = skb_shinfo(skb)->nr_frags;
3353         for (f = 0; f < nr_frags; f++)
3354                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3355                                        max_txd_pwr);
3356         if (adapter->pcix_82544)
3357                 count += nr_frags;
3358
3359
3360         if (adapter->hw.tx_pkt_filtering &&
3361             (adapter->hw.mac_type == e1000_82573))
3362                 e1000_transfer_dhcp_info(adapter, skb);
3363
3364         local_irq_save(flags);
3365         if (!spin_trylock(&tx_ring->tx_lock)) {
3366                 /* Collision - tell upper layer to requeue */
3367                 local_irq_restore(flags);
3368                 return NETDEV_TX_LOCKED;
3369         }
3370
3371         /* need: count + 2 desc gap to keep tail from touching
3372          * head, otherwise try next time */
3373         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3374                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3375                 return NETDEV_TX_BUSY;
3376         }
3377
3378         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3379                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3380                         netif_stop_queue(netdev);
3381                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3382                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3383                         return NETDEV_TX_BUSY;
3384                 }
3385         }
3386
3387         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3388                 tx_flags |= E1000_TX_FLAGS_VLAN;
3389                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3390         }
3391
3392         first = tx_ring->next_to_use;
3393
3394         tso = e1000_tso(adapter, tx_ring, skb);
3395         if (tso < 0) {
3396                 dev_kfree_skb_any(skb);
3397                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3398                 return NETDEV_TX_OK;
3399         }
3400
3401         if (likely(tso)) {
3402                 tx_ring->last_tx_tso = 1;
3403                 tx_flags |= E1000_TX_FLAGS_TSO;
3404         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3405                 tx_flags |= E1000_TX_FLAGS_CSUM;
3406
3407         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3408          * 82571 hardware supports TSO capabilities for IPv6 as well...
3409          * no longer assume, we must. */
3410         if (likely(skb->protocol == htons(ETH_P_IP)))
3411                 tx_flags |= E1000_TX_FLAGS_IPV4;
3412
3413         e1000_tx_queue(adapter, tx_ring, tx_flags,
3414                        e1000_tx_map(adapter, tx_ring, skb, first,
3415                                     max_per_txd, nr_frags, mss));
3416
3417         netdev->trans_start = jiffies;
3418
3419         /* Make sure there is space in the ring for the next send. */
3420         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3421
3422         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3423         return NETDEV_TX_OK;
3424 }
3425
3426 /**
3427  * e1000_tx_timeout - Respond to a Tx Hang
3428  * @netdev: network interface device structure
3429  **/
3430
3431 static void
3432 e1000_tx_timeout(struct net_device *netdev)
3433 {
3434         struct e1000_adapter *adapter = netdev_priv(netdev);
3435
3436         /* Do the reset outside of interrupt context */
3437         adapter->tx_timeout_count++;
3438         schedule_work(&adapter->reset_task);
3439 }
3440
3441 static void
3442 e1000_reset_task(struct work_struct *work)
3443 {
3444         struct e1000_adapter *adapter =
3445                 container_of(work, struct e1000_adapter, reset_task);
3446
3447         e1000_reinit_locked(adapter);
3448 }
3449
3450 /**
3451  * e1000_get_stats - Get System Network Statistics
3452  * @netdev: network interface device structure
3453  *
3454  * Returns the address of the device statistics structure.
3455  * The statistics are actually updated from the timer callback.
3456  **/
3457
3458 static struct net_device_stats *
3459 e1000_get_stats(struct net_device *netdev)
3460 {
3461         struct e1000_adapter *adapter = netdev_priv(netdev);
3462
3463         /* only return the current stats */
3464         return &adapter->net_stats;
3465 }
3466
3467 /**
3468  * e1000_change_mtu - Change the Maximum Transfer Unit
3469  * @netdev: network interface device structure
3470  * @new_mtu: new value for maximum frame size
3471  *
3472  * Returns 0 on success, negative on failure
3473  **/
3474
3475 static int
3476 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3477 {
3478         struct e1000_adapter *adapter = netdev_priv(netdev);
3479         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3480         uint16_t eeprom_data = 0;
3481
3482         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3483             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3484                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3485                 return -EINVAL;
3486         }
3487
3488         /* Adapter-specific max frame size limits. */
3489         switch (adapter->hw.mac_type) {
3490         case e1000_undefined ... e1000_82542_rev2_1:
3491         case e1000_ich8lan:
3492                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3493                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3494                         return -EINVAL;
3495                 }
3496                 break;
3497         case e1000_82573:
3498                 /* Jumbo Frames not supported if:
3499                  * - this is not an 82573L device
3500                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3501                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3502                                   &eeprom_data);
3503                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3504                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3505                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3506                                 DPRINTK(PROBE, ERR,
3507                                         "Jumbo Frames not supported.\n");
3508                                 return -EINVAL;
3509                         }
3510                         break;
3511                 }
3512                 /* ERT will be enabled later to enable wire speed receives */
3513
3514                 /* fall through to get support */
3515         case e1000_82571:
3516         case e1000_82572:
3517         case e1000_80003es2lan:
3518 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3519                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3520                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3521                         return -EINVAL;
3522                 }
3523                 break;
3524         default:
3525                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3526                 break;
3527         }
3528
3529         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3530          * means we reserve 2 more, this pushes us to allocate from the next
3531          * larger slab size
3532          * i.e. RXBUFFER_2048 --> size-4096 slab */
3533
3534         if (max_frame <= E1000_RXBUFFER_256)
3535                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3536         else if (max_frame <= E1000_RXBUFFER_512)
3537                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3538         else if (max_frame <= E1000_RXBUFFER_1024)
3539                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3540         else if (max_frame <= E1000_RXBUFFER_2048)
3541                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3542         else if (max_frame <= E1000_RXBUFFER_4096)
3543                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3544         else if (max_frame <= E1000_RXBUFFER_8192)
3545                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3546         else if (max_frame <= E1000_RXBUFFER_16384)
3547                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3548
3549         /* adjust allocation if LPE protects us, and we aren't using SBP */
3550         if (!adapter->hw.tbi_compatibility_on &&
3551             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3552              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3553                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3554
3555         netdev->mtu = new_mtu;
3556         adapter->hw.max_frame_size = max_frame;
3557
3558         if (netif_running(netdev))
3559                 e1000_reinit_locked(adapter);
3560
3561         return 0;
3562 }
3563
3564 /**
3565  * e1000_update_stats - Update the board statistics counters
3566  * @adapter: board private structure
3567  **/
3568
3569 void
3570 e1000_update_stats(struct e1000_adapter *adapter)
3571 {
3572         struct e1000_hw *hw = &adapter->hw;
3573         struct pci_dev *pdev = adapter->pdev;
3574         unsigned long flags;
3575         uint16_t phy_tmp;
3576
3577 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3578
3579         /*
3580          * Prevent stats update while adapter is being reset, or if the pci
3581          * connection is down.
3582          */
3583         if (adapter->link_speed == 0)
3584                 return;
3585         if (pci_channel_offline(pdev))
3586                 return;
3587
3588         spin_lock_irqsave(&adapter->stats_lock, flags);
3589
3590         /* these counters are modified from e1000_adjust_tbi_stats,
3591          * called from the interrupt context, so they must only
3592          * be written while holding adapter->stats_lock
3593          */
3594
3595         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3596         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3597         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3598         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3599         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3600         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3601         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3602
3603         if (adapter->hw.mac_type != e1000_ich8lan) {
3604                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3605                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3606                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3607                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3608                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3609                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3610         }
3611
3612         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3613         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3614         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3615         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3616         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3617         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3618         adapter->stats.dc += E1000_READ_REG(hw, DC);
3619         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3620         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3621         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3622         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3623         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3624         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3625         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3626         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3627         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3628         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3629         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3630         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3631         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3632         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3633         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3634         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3635         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3636         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3637         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3638
3639         if (adapter->hw.mac_type != e1000_ich8lan) {
3640                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3641                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3642                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3643                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3644                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3645                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3646         }
3647
3648         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3649         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3650
3651         /* used for adaptive IFS */
3652
3653         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3654         adapter->stats.tpt += hw->tx_packet_delta;
3655         hw->collision_delta = E1000_READ_REG(hw, COLC);
3656         adapter->stats.colc += hw->collision_delta;
3657
3658         if (hw->mac_type >= e1000_82543) {
3659                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3660                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3661                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3662                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3663                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3664                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3665         }
3666         if (hw->mac_type > e1000_82547_rev_2) {
3667                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3668                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3669
3670                 if (adapter->hw.mac_type != e1000_ich8lan) {
3671                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3672                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3673                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3674                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3675                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3676                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3677                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3678                 }
3679         }
3680
3681         /* Fill out the OS statistics structure */
3682         adapter->net_stats.rx_packets = adapter->stats.gprc;
3683         adapter->net_stats.tx_packets = adapter->stats.gptc;
3684         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3685         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3686         adapter->net_stats.multicast = adapter->stats.mprc;
3687         adapter->net_stats.collisions = adapter->stats.colc;
3688
3689         /* Rx Errors */
3690
3691         /* RLEC on some newer hardware can be incorrect so build
3692         * our own version based on RUC and ROC */
3693         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3694                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3695                 adapter->stats.ruc + adapter->stats.roc +
3696                 adapter->stats.cexterr;
3697         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3698         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3699         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3700         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3701         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3702
3703         /* Tx Errors */
3704         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3705         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3706         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3707         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3708         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3709         if (adapter->hw.bad_tx_carr_stats_fd &&
3710             adapter->link_duplex == FULL_DUPLEX) {
3711                 adapter->net_stats.tx_carrier_errors = 0;
3712                 adapter->stats.tncrs = 0;
3713         }
3714
3715         /* Tx Dropped needs to be maintained elsewhere */
3716
3717         /* Phy Stats */
3718         if (hw->media_type == e1000_media_type_copper) {
3719                 if ((adapter->link_speed == SPEED_1000) &&
3720                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3721                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3722                         adapter->phy_stats.idle_errors += phy_tmp;
3723                 }
3724
3725                 if ((hw->mac_type <= e1000_82546) &&
3726                    (hw->phy_type == e1000_phy_m88) &&
3727                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3728                         adapter->phy_stats.receive_errors += phy_tmp;
3729         }
3730
3731         /* Management Stats */
3732         if (adapter->hw.has_smbus) {
3733                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3734                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3735                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3736         }
3737
3738         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3739 }
3740 #ifdef CONFIG_PCI_MSI
3741
3742 /**
3743  * e1000_intr_msi - Interrupt Handler
3744  * @irq: interrupt number
3745  * @data: pointer to a network interface device structure
3746  **/
3747
3748 static irqreturn_t
3749 e1000_intr_msi(int irq, void *data)
3750 {
3751         struct net_device *netdev = data;
3752         struct e1000_adapter *adapter = netdev_priv(netdev);
3753         struct e1000_hw *hw = &adapter->hw;
3754 #ifndef CONFIG_E1000_NAPI
3755         int i;
3756 #endif
3757         uint32_t icr = E1000_READ_REG(hw, ICR);
3758
3759 #ifdef CONFIG_E1000_NAPI
3760         /* read ICR disables interrupts using IAM, so keep up with our
3761          * enable/disable accounting */
3762         atomic_inc(&adapter->irq_sem);
3763 #endif
3764         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3765                 hw->get_link_status = 1;
3766                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3767                  * link down event; disable receives here in the ISR and reset
3768                  * adapter in watchdog */
3769                 if (netif_carrier_ok(netdev) &&
3770                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3771                         /* disable receives */
3772                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3773                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3774                 }
3775                 /* guard against interrupt when we're going down */
3776                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3777                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3778         }
3779
3780 #ifdef CONFIG_E1000_NAPI
3781         if (likely(netif_rx_schedule_prep(netdev))) {
3782                 adapter->total_tx_bytes = 0;
3783                 adapter->total_tx_packets = 0;
3784                 adapter->total_rx_bytes = 0;
3785                 adapter->total_rx_packets = 0;
3786                 __netif_rx_schedule(netdev);
3787         } else
3788                 e1000_irq_enable(adapter);
3789 #else
3790         adapter->total_tx_bytes = 0;
3791         adapter->total_rx_bytes = 0;
3792         adapter->total_tx_packets = 0;
3793         adapter->total_rx_packets = 0;
3794
3795         for (i = 0; i < E1000_MAX_INTR; i++)
3796                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3797                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3798                         break;
3799
3800         if (likely(adapter->itr_setting & 3))
3801                 e1000_set_itr(adapter);
3802 #endif
3803
3804         return IRQ_HANDLED;
3805 }
3806 #endif
3807
3808 /**
3809  * e1000_intr - Interrupt Handler
3810  * @irq: interrupt number
3811  * @data: pointer to a network interface device structure
3812  **/
3813
3814 static irqreturn_t
3815 e1000_intr(int irq, void *data)
3816 {
3817         struct net_device *netdev = data;
3818         struct e1000_adapter *adapter = netdev_priv(netdev);
3819         struct e1000_hw *hw = &adapter->hw;
3820         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3821 #ifndef CONFIG_E1000_NAPI
3822         int i;
3823 #endif
3824         if (unlikely(!icr))
3825                 return IRQ_NONE;  /* Not our interrupt */
3826
3827 #ifdef CONFIG_E1000_NAPI
3828         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3829          * not set, then the adapter didn't send an interrupt */
3830         if (unlikely(hw->mac_type >= e1000_82571 &&
3831                      !(icr & E1000_ICR_INT_ASSERTED)))
3832                 return IRQ_NONE;
3833
3834         /* Interrupt Auto-Mask...upon reading ICR,
3835          * interrupts are masked.  No need for the
3836          * IMC write, but it does mean we should
3837          * account for it ASAP. */
3838         if (likely(hw->mac_type >= e1000_82571))
3839                 atomic_inc(&adapter->irq_sem);
3840 #endif
3841
3842         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3843                 hw->get_link_status = 1;
3844                 /* 80003ES2LAN workaround--
3845                  * For packet buffer work-around on link down event;
3846                  * disable receives here in the ISR and
3847                  * reset adapter in watchdog
3848                  */
3849                 if (netif_carrier_ok(netdev) &&
3850                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3851                         /* disable receives */
3852                         rctl = E1000_READ_REG(hw, RCTL);
3853                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3854                 }
3855                 /* guard against interrupt when we're going down */
3856                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3857                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3858         }
3859
3860 #ifdef CONFIG_E1000_NAPI
3861         if (unlikely(hw->mac_type < e1000_82571)) {
3862                 /* disable interrupts, without the synchronize_irq bit */
3863                 atomic_inc(&adapter->irq_sem);
3864                 E1000_WRITE_REG(hw, IMC, ~0);
3865                 E1000_WRITE_FLUSH(hw);
3866         }
3867         if (likely(netif_rx_schedule_prep(netdev))) {
3868                 adapter->total_tx_bytes = 0;
3869                 adapter->total_tx_packets = 0;
3870                 adapter->total_rx_bytes = 0;
3871                 adapter->total_rx_packets = 0;
3872                 __netif_rx_schedule(netdev);
3873         } else
3874                 /* this really should not happen! if it does it is basically a
3875                  * bug, but not a hard error, so enable ints and continue */
3876                 e1000_irq_enable(adapter);
3877 #else
3878         /* Writing IMC and IMS is needed for 82547.
3879          * Due to Hub Link bus being occupied, an interrupt
3880          * de-assertion message is not able to be sent.
3881          * When an interrupt assertion message is generated later,
3882          * two messages are re-ordered and sent out.
3883          * That causes APIC to think 82547 is in de-assertion
3884          * state, while 82547 is in assertion state, resulting
3885          * in dead lock. Writing IMC forces 82547 into
3886          * de-assertion state.
3887          */
3888         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3889                 atomic_inc(&adapter->irq_sem);
3890                 E1000_WRITE_REG(hw, IMC, ~0);
3891         }
3892
3893         adapter->total_tx_bytes = 0;
3894         adapter->total_rx_bytes = 0;
3895         adapter->total_tx_packets = 0;
3896         adapter->total_rx_packets = 0;
3897
3898         for (i = 0; i < E1000_MAX_INTR; i++)
3899                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3900                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3901                         break;
3902
3903         if (likely(adapter->itr_setting & 3))
3904                 e1000_set_itr(adapter);
3905
3906         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3907                 e1000_irq_enable(adapter);
3908
3909 #endif
3910         return IRQ_HANDLED;
3911 }
3912
3913 #ifdef CONFIG_E1000_NAPI
3914 /**
3915  * e1000_clean - NAPI Rx polling callback
3916  * @adapter: board private structure
3917  **/
3918
3919 static int
3920 e1000_clean(struct net_device *poll_dev, int *budget)
3921 {
3922         struct e1000_adapter *adapter;
3923         int work_to_do = min(*budget, poll_dev->quota);
3924         int tx_cleaned = 0, work_done = 0;
3925
3926         /* Must NOT use netdev_priv macro here. */
3927         adapter = poll_dev->priv;
3928
3929         /* Keep link state information with original netdev */
3930         if (!netif_carrier_ok(poll_dev))
3931                 goto quit_polling;
3932
3933         /* e1000_clean is called per-cpu.  This lock protects
3934          * tx_ring[0] from being cleaned by multiple cpus
3935          * simultaneously.  A failure obtaining the lock means
3936          * tx_ring[0] is currently being cleaned anyway. */
3937         if (spin_trylock(&adapter->tx_queue_lock)) {
3938                 tx_cleaned = e1000_clean_tx_irq(adapter,
3939                                                 &adapter->tx_ring[0]);
3940                 spin_unlock(&adapter->tx_queue_lock);
3941         }
3942
3943         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3944                           &work_done, work_to_do);
3945
3946         *budget -= work_done;
3947         poll_dev->quota -= work_done;
3948
3949         /* If no Tx and not enough Rx work done, exit the polling mode */
3950         if ((!tx_cleaned && (work_done == 0)) ||
3951            !netif_running(poll_dev)) {
3952 quit_polling:
3953                 if (likely(adapter->itr_setting & 3))
3954                         e1000_set_itr(adapter);
3955                 netif_rx_complete(poll_dev);
3956                 e1000_irq_enable(adapter);
3957                 return 0;
3958         }
3959
3960         return 1;
3961 }
3962
3963 #endif
3964 /**
3965  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3966  * @adapter: board private structure
3967  **/
3968
3969 static boolean_t
3970 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3971                    struct e1000_tx_ring *tx_ring)
3972 {
3973         struct net_device *netdev = adapter->netdev;
3974         struct e1000_tx_desc *tx_desc, *eop_desc;
3975         struct e1000_buffer *buffer_info;
3976         unsigned int i, eop;
3977 #ifdef CONFIG_E1000_NAPI
3978         unsigned int count = 0;
3979 #endif
3980         boolean_t cleaned = FALSE;
3981         unsigned int total_tx_bytes=0, total_tx_packets=0;
3982
3983         i = tx_ring->next_to_clean;
3984         eop = tx_ring->buffer_info[i].next_to_watch;
3985         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3986
3987         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3988                 for (cleaned = FALSE; !cleaned; ) {
3989                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3990                         buffer_info = &tx_ring->buffer_info[i];
3991                         cleaned = (i == eop);
3992
3993                         if (cleaned) {
3994                                 struct sk_buff *skb = buffer_info->skb;
3995                                 unsigned int segs, bytecount;
3996                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3997                                 /* multiply data chunks by size of headers */
3998                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3999                                             skb->len;
4000                                 total_tx_packets += segs;
4001                                 total_tx_bytes += bytecount;
4002                         }
4003                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4004                         tx_desc->upper.data = 0;
4005
4006                         if (unlikely(++i == tx_ring->count)) i = 0;
4007                 }
4008
4009                 eop = tx_ring->buffer_info[i].next_to_watch;
4010                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4011 #ifdef CONFIG_E1000_NAPI
4012 #define E1000_TX_WEIGHT 64
4013                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4014                 if (count++ == E1000_TX_WEIGHT) break;
4015 #endif
4016         }
4017
4018         tx_ring->next_to_clean = i;
4019
4020 #define TX_WAKE_THRESHOLD 32
4021         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4022                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4023                 /* Make sure that anybody stopping the queue after this
4024                  * sees the new next_to_clean.
4025                  */
4026                 smp_mb();
4027                 if (netif_queue_stopped(netdev)) {
4028                         netif_wake_queue(netdev);
4029                         ++adapter->restart_queue;
4030                 }
4031         }
4032
4033         if (adapter->detect_tx_hung) {
4034                 /* Detect a transmit hang in hardware, this serializes the
4035                  * check with the clearing of time_stamp and movement of i */
4036                 adapter->detect_tx_hung = FALSE;
4037                 if (tx_ring->buffer_info[eop].dma &&
4038                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4039                                (adapter->tx_timeout_factor * HZ))
4040                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4041                          E1000_STATUS_TXOFF)) {
4042
4043                         /* detected Tx unit hang */
4044                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4045                                         "  Tx Queue             <%lu>\n"
4046                                         "  TDH                  <%x>\n"
4047                                         "  TDT                  <%x>\n"
4048                                         "  next_to_use          <%x>\n"
4049                                         "  next_to_clean        <%x>\n"
4050                                         "buffer_info[next_to_clean]\n"
4051                                         "  time_stamp           <%lx>\n"
4052                                         "  next_to_watch        <%x>\n"
4053                                         "  jiffies              <%lx>\n"
4054                                         "  next_to_watch.status <%x>\n",
4055                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4056                                         sizeof(struct e1000_tx_ring)),
4057                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4058                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4059                                 tx_ring->next_to_use,
4060                                 tx_ring->next_to_clean,
4061                                 tx_ring->buffer_info[eop].time_stamp,
4062                                 eop,
4063                                 jiffies,
4064                                 eop_desc->upper.fields.status);
4065                         netif_stop_queue(netdev);
4066                 }
4067         }
4068         adapter->total_tx_bytes += total_tx_bytes;
4069         adapter->total_tx_packets += total_tx_packets;
4070         return cleaned;
4071 }
4072
4073 /**
4074  * e1000_rx_checksum - Receive Checksum Offload for 82543
4075  * @adapter:     board private structure
4076  * @status_err:  receive descriptor status and error fields
4077  * @csum:        receive descriptor csum field
4078  * @sk_buff:     socket buffer with received data
4079  **/
4080
4081 static void
4082 e1000_rx_checksum(struct e1000_adapter *adapter,
4083                   uint32_t status_err, uint32_t csum,
4084                   struct sk_buff *skb)
4085 {
4086         uint16_t status = (uint16_t)status_err;
4087         uint8_t errors = (uint8_t)(status_err >> 24);
4088         skb->ip_summed = CHECKSUM_NONE;
4089
4090         /* 82543 or newer only */
4091         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4092         /* Ignore Checksum bit is set */
4093         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4094         /* TCP/UDP checksum error bit is set */
4095         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4096                 /* let the stack verify checksum errors */
4097                 adapter->hw_csum_err++;
4098                 return;
4099         }
4100         /* TCP/UDP Checksum has not been calculated */
4101         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4102                 if (!(status & E1000_RXD_STAT_TCPCS))
4103                         return;
4104         } else {
4105                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4106                         return;
4107         }
4108         /* It must be a TCP or UDP packet with a valid checksum */
4109         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4110                 /* TCP checksum is good */
4111                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4112         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4113                 /* IP fragment with UDP payload */
4114                 /* Hardware complements the payload checksum, so we undo it
4115                  * and then put the value in host order for further stack use.
4116                  */
4117                 csum = ntohl(csum ^ 0xFFFF);
4118                 skb->csum = csum;
4119                 skb->ip_summed = CHECKSUM_COMPLETE;
4120         }
4121         adapter->hw_csum_good++;
4122 }
4123
4124 /**
4125  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4126  * @adapter: board private structure
4127  **/
4128
4129 static boolean_t
4130 #ifdef CONFIG_E1000_NAPI
4131 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4132                    struct e1000_rx_ring *rx_ring,
4133                    int *work_done, int work_to_do)
4134 #else
4135 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4136                    struct e1000_rx_ring *rx_ring)
4137 #endif
4138 {
4139         struct net_device *netdev = adapter->netdev;
4140         struct pci_dev *pdev = adapter->pdev;
4141         struct e1000_rx_desc *rx_desc, *next_rxd;
4142         struct e1000_buffer *buffer_info, *next_buffer;
4143         unsigned long flags;
4144         uint32_t length;
4145         uint8_t last_byte;
4146         unsigned int i;
4147         int cleaned_count = 0;
4148         boolean_t cleaned = FALSE;
4149         unsigned int total_rx_bytes=0, total_rx_packets=0;
4150
4151         i = rx_ring->next_to_clean;
4152         rx_desc = E1000_RX_DESC(*rx_ring, i);
4153         buffer_info = &rx_ring->buffer_info[i];
4154
4155         while (rx_desc->status & E1000_RXD_STAT_DD) {
4156                 struct sk_buff *skb;
4157                 u8 status;
4158
4159 #ifdef CONFIG_E1000_NAPI
4160                 if (*work_done >= work_to_do)
4161                         break;
4162                 (*work_done)++;
4163 #endif
4164                 status = rx_desc->status;
4165                 skb = buffer_info->skb;
4166                 buffer_info->skb = NULL;
4167
4168                 prefetch(skb->data - NET_IP_ALIGN);
4169
4170                 if (++i == rx_ring->count) i = 0;
4171                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4172                 prefetch(next_rxd);
4173
4174                 next_buffer = &rx_ring->buffer_info[i];
4175
4176                 cleaned = TRUE;
4177                 cleaned_count++;
4178                 pci_unmap_single(pdev,
4179                                  buffer_info->dma,
4180                                  buffer_info->length,
4181                                  PCI_DMA_FROMDEVICE);
4182
4183                 length = le16_to_cpu(rx_desc->length);
4184
4185                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4186                         /* All receives must fit into a single buffer */
4187                         E1000_DBG("%s: Receive packet consumed multiple"
4188                                   " buffers\n", netdev->name);
4189                         /* recycle */
4190                         buffer_info->skb = skb;
4191                         goto next_desc;
4192                 }
4193
4194                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4195                         last_byte = *(skb->data + length - 1);
4196                         if (TBI_ACCEPT(&adapter->hw, status,
4197                                       rx_desc->errors, length, last_byte)) {
4198                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4199                                 e1000_tbi_adjust_stats(&adapter->hw,
4200                                                        &adapter->stats,
4201                                                        length, skb->data);
4202                                 spin_unlock_irqrestore(&adapter->stats_lock,
4203                                                        flags);
4204                                 length--;
4205                         } else {
4206                                 /* recycle */
4207                                 buffer_info->skb = skb;
4208                                 goto next_desc;
4209                         }
4210                 }
4211
4212                 /* adjust length to remove Ethernet CRC, this must be
4213                  * done after the TBI_ACCEPT workaround above */
4214                 length -= 4;
4215
4216                 /* probably a little skewed due to removing CRC */
4217                 total_rx_bytes += length;
4218                 total_rx_packets++;
4219
4220                 /* code added for copybreak, this should improve
4221                  * performance for small packets with large amounts
4222                  * of reassembly being done in the stack */
4223                 if (length < copybreak) {
4224                         struct sk_buff *new_skb =
4225                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4226                         if (new_skb) {
4227                                 skb_reserve(new_skb, NET_IP_ALIGN);
4228                                 skb_copy_to_linear_data_offset(new_skb,
4229                                                                -NET_IP_ALIGN,
4230                                                                (skb->data -
4231                                                                 NET_IP_ALIGN),
4232                                                                (length +
4233                                                                 NET_IP_ALIGN));
4234                                 /* save the skb in buffer_info as good */
4235                                 buffer_info->skb = skb;
4236                                 skb = new_skb;
4237                         }
4238                         /* else just continue with the old one */
4239                 }
4240                 /* end copybreak code */
4241                 skb_put(skb, length);
4242
4243                 /* Receive Checksum Offload */
4244                 e1000_rx_checksum(adapter,
4245                                   (uint32_t)(status) |
4246                                   ((uint32_t)(rx_desc->errors) << 24),
4247                                   le16_to_cpu(rx_desc->csum), skb);
4248
4249                 skb->protocol = eth_type_trans(skb, netdev);
4250 #ifdef CONFIG_E1000_NAPI
4251                 if (unlikely(adapter->vlgrp &&
4252                             (status & E1000_RXD_STAT_VP))) {
4253                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4254                                                  le16_to_cpu(rx_desc->special) &
4255                                                  E1000_RXD_SPC_VLAN_MASK);
4256                 } else {
4257                         netif_receive_skb(skb);
4258                 }
4259 #else /* CONFIG_E1000_NAPI */
4260                 if (unlikely(adapter->vlgrp &&
4261                             (status & E1000_RXD_STAT_VP))) {
4262                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4263                                         le16_to_cpu(rx_desc->special) &
4264                                         E1000_RXD_SPC_VLAN_MASK);
4265                 } else {
4266                         netif_rx(skb);
4267                 }
4268 #endif /* CONFIG_E1000_NAPI */
4269                 netdev->last_rx = jiffies;
4270
4271 next_desc:
4272                 rx_desc->status = 0;
4273
4274                 /* return some buffers to hardware, one at a time is too slow */
4275                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4276                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4277                         cleaned_count = 0;
4278                 }
4279
4280                 /* use prefetched values */
4281                 rx_desc = next_rxd;
4282                 buffer_info = next_buffer;
4283         }
4284         rx_ring->next_to_clean = i;
4285
4286         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4287         if (cleaned_count)
4288                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4289
4290         adapter->total_rx_packets += total_rx_packets;
4291         adapter->total_rx_bytes += total_rx_bytes;
4292         return cleaned;
4293 }
4294
4295 /**
4296  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4297  * @adapter: board private structure
4298  **/
4299
4300 static boolean_t
4301 #ifdef CONFIG_E1000_NAPI
4302 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4303                       struct e1000_rx_ring *rx_ring,
4304                       int *work_done, int work_to_do)
4305 #else
4306 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4307                       struct e1000_rx_ring *rx_ring)
4308 #endif
4309 {
4310         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4311         struct net_device *netdev = adapter->netdev;
4312         struct pci_dev *pdev = adapter->pdev;
4313         struct e1000_buffer *buffer_info, *next_buffer;
4314         struct e1000_ps_page *ps_page;
4315         struct e1000_ps_page_dma *ps_page_dma;
4316         struct sk_buff *skb;
4317         unsigned int i, j;
4318         uint32_t length, staterr;
4319         int cleaned_count = 0;
4320         boolean_t cleaned = FALSE;
4321         unsigned int total_rx_bytes=0, total_rx_packets=0;
4322
4323         i = rx_ring->next_to_clean;
4324         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4325         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4326         buffer_info = &rx_ring->buffer_info[i];
4327
4328         while (staterr & E1000_RXD_STAT_DD) {
4329                 ps_page = &rx_ring->ps_page[i];
4330                 ps_page_dma = &rx_ring->ps_page_dma[i];
4331 #ifdef CONFIG_E1000_NAPI
4332                 if (unlikely(*work_done >= work_to_do))
4333                         break;
4334                 (*work_done)++;
4335 #endif
4336                 skb = buffer_info->skb;
4337
4338                 /* in the packet split case this is header only */
4339                 prefetch(skb->data - NET_IP_ALIGN);
4340
4341                 if (++i == rx_ring->count) i = 0;
4342                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4343                 prefetch(next_rxd);
4344
4345                 next_buffer = &rx_ring->buffer_info[i];
4346
4347                 cleaned = TRUE;
4348                 cleaned_count++;
4349                 pci_unmap_single(pdev, buffer_info->dma,
4350                                  buffer_info->length,
4351                                  PCI_DMA_FROMDEVICE);
4352
4353                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4354                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4355                                   " the full packet\n", netdev->name);
4356                         dev_kfree_skb_irq(skb);
4357                         goto next_desc;
4358                 }
4359
4360                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4361                         dev_kfree_skb_irq(skb);
4362                         goto next_desc;
4363                 }
4364
4365                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4366
4367                 if (unlikely(!length)) {
4368                         E1000_DBG("%s: Last part of the packet spanning"
4369                                   " multiple descriptors\n", netdev->name);
4370                         dev_kfree_skb_irq(skb);
4371                         goto next_desc;
4372                 }
4373
4374                 /* Good Receive */
4375                 skb_put(skb, length);
4376
4377                 {
4378                 /* this looks ugly, but it seems compiler issues make it
4379                    more efficient than reusing j */
4380                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4381
4382                 /* page alloc/put takes too long and effects small packet
4383                  * throughput, so unsplit small packets and save the alloc/put*/
4384                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4385                         u8 *vaddr;
4386                         /* there is no documentation about how to call
4387                          * kmap_atomic, so we can't hold the mapping
4388                          * very long */
4389                         pci_dma_sync_single_for_cpu(pdev,
4390                                 ps_page_dma->ps_page_dma[0],
4391                                 PAGE_SIZE,
4392                                 PCI_DMA_FROMDEVICE);
4393                         vaddr = kmap_atomic(ps_page->ps_page[0],
4394                                             KM_SKB_DATA_SOFTIRQ);
4395                         memcpy(skb_tail_pointer(skb), vaddr, l1);
4396                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4397                         pci_dma_sync_single_for_device(pdev,
4398                                 ps_page_dma->ps_page_dma[0],
4399                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4400                         /* remove the CRC */
4401                         l1 -= 4;
4402                         skb_put(skb, l1);
4403                         goto copydone;
4404                 } /* if */
4405                 }
4406
4407                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4408                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4409                                 break;
4410                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4411                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4412                         ps_page_dma->ps_page_dma[j] = 0;
4413                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4414                                            length);
4415                         ps_page->ps_page[j] = NULL;
4416                         skb->len += length;
4417                         skb->data_len += length;
4418                         skb->truesize += length;
4419                 }
4420
4421                 /* strip the ethernet crc, problem is we're using pages now so
4422                  * this whole operation can get a little cpu intensive */
4423                 pskb_trim(skb, skb->len - 4);
4424
4425 copydone:
4426                 total_rx_bytes += skb->len;
4427                 total_rx_packets++;
4428
4429                 e1000_rx_checksum(adapter, staterr,
4430                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4431                 skb->protocol = eth_type_trans(skb, netdev);
4432
4433                 if (likely(rx_desc->wb.upper.header_status &
4434                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4435                         adapter->rx_hdr_split++;
4436 #ifdef CONFIG_E1000_NAPI
4437                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4438                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4439                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4440                                 E1000_RXD_SPC_VLAN_MASK);
4441                 } else {
4442                         netif_receive_skb(skb);
4443                 }
4444 #else /* CONFIG_E1000_NAPI */
4445                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4446                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4447                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4448                                 E1000_RXD_SPC_VLAN_MASK);
4449                 } else {
4450                         netif_rx(skb);
4451                 }
4452 #endif /* CONFIG_E1000_NAPI */
4453                 netdev->last_rx = jiffies;
4454
4455 next_desc:
4456                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4457                 buffer_info->skb = NULL;
4458
4459                 /* return some buffers to hardware, one at a time is too slow */
4460                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4461                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4462                         cleaned_count = 0;
4463                 }
4464
4465                 /* use prefetched values */
4466                 rx_desc = next_rxd;
4467                 buffer_info = next_buffer;
4468
4469                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4470         }
4471         rx_ring->next_to_clean = i;
4472
4473         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4474         if (cleaned_count)
4475                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4476
4477         adapter->total_rx_packets += total_rx_packets;
4478         adapter->total_rx_bytes += total_rx_bytes;
4479         return cleaned;
4480 }
4481
4482 /**
4483  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4484  * @adapter: address of board private structure
4485  **/
4486
4487 static void
4488 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4489                        struct e1000_rx_ring *rx_ring,
4490                        int cleaned_count)
4491 {
4492         struct net_device *netdev = adapter->netdev;
4493         struct pci_dev *pdev = adapter->pdev;
4494         struct e1000_rx_desc *rx_desc;
4495         struct e1000_buffer *buffer_info;
4496         struct sk_buff *skb;
4497         unsigned int i;
4498         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4499
4500         i = rx_ring->next_to_use;
4501         buffer_info = &rx_ring->buffer_info[i];
4502
4503         while (cleaned_count--) {
4504                 skb = buffer_info->skb;
4505                 if (skb) {
4506                         skb_trim(skb, 0);
4507                         goto map_skb;
4508                 }
4509
4510                 skb = netdev_alloc_skb(netdev, bufsz);
4511                 if (unlikely(!skb)) {
4512                         /* Better luck next round */
4513                         adapter->alloc_rx_buff_failed++;
4514                         break;
4515                 }
4516
4517                 /* Fix for errata 23, can't cross 64kB boundary */
4518                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4519                         struct sk_buff *oldskb = skb;
4520                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4521                                              "at %p\n", bufsz, skb->data);
4522                         /* Try again, without freeing the previous */
4523                         skb = netdev_alloc_skb(netdev, bufsz);
4524                         /* Failed allocation, critical failure */
4525                         if (!skb) {
4526                                 dev_kfree_skb(oldskb);
4527                                 break;
4528                         }
4529
4530                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4531                                 /* give up */
4532                                 dev_kfree_skb(skb);
4533                                 dev_kfree_skb(oldskb);
4534                                 break; /* while !buffer_info->skb */
4535                         }
4536
4537                         /* Use new allocation */
4538                         dev_kfree_skb(oldskb);
4539                 }
4540                 /* Make buffer alignment 2 beyond a 16 byte boundary
4541                  * this will result in a 16 byte aligned IP header after
4542                  * the 14 byte MAC header is removed
4543                  */
4544                 skb_reserve(skb, NET_IP_ALIGN);
4545
4546                 buffer_info->skb = skb;
4547                 buffer_info->length = adapter->rx_buffer_len;
4548 map_skb:
4549                 buffer_info->dma = pci_map_single(pdev,
4550                                                   skb->data,
4551                                                   adapter->rx_buffer_len,
4552                                                   PCI_DMA_FROMDEVICE);
4553
4554                 /* Fix for errata 23, can't cross 64kB boundary */
4555                 if (!e1000_check_64k_bound(adapter,
4556                                         (void *)(unsigned long)buffer_info->dma,
4557                                         adapter->rx_buffer_len)) {
4558                         DPRINTK(RX_ERR, ERR,
4559                                 "dma align check failed: %u bytes at %p\n",
4560                                 adapter->rx_buffer_len,
4561                                 (void *)(unsigned long)buffer_info->dma);
4562                         dev_kfree_skb(skb);
4563                         buffer_info->skb = NULL;
4564
4565                         pci_unmap_single(pdev, buffer_info->dma,
4566                                          adapter->rx_buffer_len,
4567                                          PCI_DMA_FROMDEVICE);
4568
4569                         break; /* while !buffer_info->skb */
4570                 }
4571                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4572                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4573
4574                 if (unlikely(++i == rx_ring->count))
4575                         i = 0;
4576                 buffer_info = &rx_ring->buffer_info[i];
4577         }
4578
4579         if (likely(rx_ring->next_to_use != i)) {
4580                 rx_ring->next_to_use = i;
4581                 if (unlikely(i-- == 0))
4582                         i = (rx_ring->count - 1);
4583
4584                 /* Force memory writes to complete before letting h/w
4585                  * know there are new descriptors to fetch.  (Only
4586                  * applicable for weak-ordered memory model archs,
4587                  * such as IA-64). */
4588                 wmb();
4589                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4590         }
4591 }
4592
4593 /**
4594  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4595  * @adapter: address of board private structure
4596  **/
4597
4598 static void
4599 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4600                           struct e1000_rx_ring *rx_ring,
4601                           int cleaned_count)
4602 {
4603         struct net_device *netdev = adapter->netdev;
4604         struct pci_dev *pdev = adapter->pdev;
4605         union e1000_rx_desc_packet_split *rx_desc;
4606         struct e1000_buffer *buffer_info;
4607         struct e1000_ps_page *ps_page;
4608         struct e1000_ps_page_dma *ps_page_dma;
4609         struct sk_buff *skb;
4610         unsigned int i, j;
4611
4612         i = rx_ring->next_to_use;
4613         buffer_info = &rx_ring->buffer_info[i];
4614         ps_page = &rx_ring->ps_page[i];
4615         ps_page_dma = &rx_ring->ps_page_dma[i];
4616
4617         while (cleaned_count--) {
4618                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4619
4620                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4621                         if (j < adapter->rx_ps_pages) {
4622                                 if (likely(!ps_page->ps_page[j])) {
4623                                         ps_page->ps_page[j] =
4624                                                 alloc_page(GFP_ATOMIC);
4625                                         if (unlikely(!ps_page->ps_page[j])) {
4626                                                 adapter->alloc_rx_buff_failed++;
4627                                                 goto no_buffers;
4628                                         }
4629                                         ps_page_dma->ps_page_dma[j] =
4630                                                 pci_map_page(pdev,
4631                                                             ps_page->ps_page[j],
4632                                                             0, PAGE_SIZE,
4633                                                             PCI_DMA_FROMDEVICE);
4634                                 }
4635                                 /* Refresh the desc even if buffer_addrs didn't
4636                                  * change because each write-back erases
4637                                  * this info.
4638                                  */
4639                                 rx_desc->read.buffer_addr[j+1] =
4640                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4641                         } else
4642                                 rx_desc->read.buffer_addr[j+1] = ~0;
4643                 }
4644
4645                 skb = netdev_alloc_skb(netdev,
4646                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4647
4648                 if (unlikely(!skb)) {
4649                         adapter->alloc_rx_buff_failed++;
4650                         break;
4651                 }
4652
4653                 /* Make buffer alignment 2 beyond a 16 byte boundary
4654                  * this will result in a 16 byte aligned IP header after
4655                  * the 14 byte MAC header is removed
4656                  */
4657                 skb_reserve(skb, NET_IP_ALIGN);
4658
4659                 buffer_info->skb = skb;
4660                 buffer_info->length = adapter->rx_ps_bsize0;
4661                 buffer_info->dma = pci_map_single(pdev, skb->data,
4662                                                   adapter->rx_ps_bsize0,
4663                                                   PCI_DMA_FROMDEVICE);
4664
4665                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4666
4667                 if (unlikely(++i == rx_ring->count)) i = 0;
4668                 buffer_info = &rx_ring->buffer_info[i];
4669                 ps_page = &rx_ring->ps_page[i];
4670                 ps_page_dma = &rx_ring->ps_page_dma[i];
4671         }
4672
4673 no_buffers:
4674         if (likely(rx_ring->next_to_use != i)) {
4675                 rx_ring->next_to_use = i;
4676                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4677
4678                 /* Force memory writes to complete before letting h/w
4679                  * know there are new descriptors to fetch.  (Only
4680                  * applicable for weak-ordered memory model archs,
4681                  * such as IA-64). */
4682                 wmb();
4683                 /* Hardware increments by 16 bytes, but packet split
4684                  * descriptors are 32 bytes...so we increment tail
4685                  * twice as much.
4686                  */
4687                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4688         }
4689 }
4690
4691 /**
4692  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4693  * @adapter:
4694  **/
4695
4696 static void
4697 e1000_smartspeed(struct e1000_adapter *adapter)
4698 {
4699         uint16_t phy_status;
4700         uint16_t phy_ctrl;
4701
4702         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4703            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4704                 return;
4705
4706         if (adapter->smartspeed == 0) {
4707                 /* If Master/Slave config fault is asserted twice,
4708                  * we assume back-to-back */
4709                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4710                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4711                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4712                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4713                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4714                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4715                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4716                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4717                                             phy_ctrl);
4718                         adapter->smartspeed++;
4719                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4720                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4721                                                &phy_ctrl)) {
4722                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4723                                              MII_CR_RESTART_AUTO_NEG);
4724                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4725                                                     phy_ctrl);
4726                         }
4727                 }
4728                 return;
4729         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4730                 /* If still no link, perhaps using 2/3 pair cable */
4731                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4732                 phy_ctrl |= CR_1000T_MS_ENABLE;
4733                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4734                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4735                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4736                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4737                                      MII_CR_RESTART_AUTO_NEG);
4738                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4739                 }
4740         }
4741         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4742         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4743                 adapter->smartspeed = 0;
4744 }
4745
4746 /**
4747  * e1000_ioctl -
4748  * @netdev:
4749  * @ifreq:
4750  * @cmd:
4751  **/
4752
4753 static int
4754 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4755 {
4756         switch (cmd) {
4757         case SIOCGMIIPHY:
4758         case SIOCGMIIREG:
4759         case SIOCSMIIREG:
4760                 return e1000_mii_ioctl(netdev, ifr, cmd);
4761         default:
4762                 return -EOPNOTSUPP;
4763         }
4764 }
4765
4766 /**
4767  * e1000_mii_ioctl -
4768  * @netdev:
4769  * @ifreq:
4770  * @cmd:
4771  **/
4772
4773 static int
4774 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4775 {
4776         struct e1000_adapter *adapter = netdev_priv(netdev);
4777         struct mii_ioctl_data *data = if_mii(ifr);
4778         int retval;
4779         uint16_t mii_reg;
4780         uint16_t spddplx;
4781         unsigned long flags;
4782
4783         if (adapter->hw.media_type != e1000_media_type_copper)
4784                 return -EOPNOTSUPP;
4785
4786         switch (cmd) {
4787         case SIOCGMIIPHY:
4788                 data->phy_id = adapter->hw.phy_addr;
4789                 break;
4790         case SIOCGMIIREG:
4791                 if (!capable(CAP_NET_ADMIN))
4792                         return -EPERM;
4793                 spin_lock_irqsave(&adapter->stats_lock, flags);
4794                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4795                                    &data->val_out)) {
4796                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4797                         return -EIO;
4798                 }
4799                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4800                 break;
4801         case SIOCSMIIREG:
4802                 if (!capable(CAP_NET_ADMIN))
4803                         return -EPERM;
4804                 if (data->reg_num & ~(0x1F))
4805                         return -EFAULT;
4806                 mii_reg = data->val_in;
4807                 spin_lock_irqsave(&adapter->stats_lock, flags);
4808                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4809                                         mii_reg)) {
4810                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4811                         return -EIO;
4812                 }
4813                 if (adapter->hw.media_type == e1000_media_type_copper) {
4814                         switch (data->reg_num) {
4815                         case PHY_CTRL:
4816                                 if (mii_reg & MII_CR_POWER_DOWN)
4817                                         break;
4818                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4819                                         adapter->hw.autoneg = 1;
4820                                         adapter->hw.autoneg_advertised = 0x2F;
4821                                 } else {
4822                                         if (mii_reg & 0x40)
4823                                                 spddplx = SPEED_1000;
4824                                         else if (mii_reg & 0x2000)
4825                                                 spddplx = SPEED_100;
4826                                         else
4827                                                 spddplx = SPEED_10;
4828                                         spddplx += (mii_reg & 0x100)
4829                                                    ? DUPLEX_FULL :
4830                                                    DUPLEX_HALF;
4831                                         retval = e1000_set_spd_dplx(adapter,
4832                                                                     spddplx);
4833                                         if (retval) {
4834                                                 spin_unlock_irqrestore(
4835                                                         &adapter->stats_lock,
4836                                                         flags);
4837                                                 return retval;
4838                                         }
4839                                 }
4840                                 if (netif_running(adapter->netdev))
4841                                         e1000_reinit_locked(adapter);
4842                                 else
4843                                         e1000_reset(adapter);
4844                                 break;
4845                         case M88E1000_PHY_SPEC_CTRL:
4846                         case M88E1000_EXT_PHY_SPEC_CTRL:
4847                                 if (e1000_phy_reset(&adapter->hw)) {
4848                                         spin_unlock_irqrestore(
4849                                                 &adapter->stats_lock, flags);
4850                                         return -EIO;
4851                                 }
4852                                 break;
4853                         }
4854                 } else {
4855                         switch (data->reg_num) {
4856                         case PHY_CTRL:
4857                                 if (mii_reg & MII_CR_POWER_DOWN)
4858                                         break;
4859                                 if (netif_running(adapter->netdev))
4860                                         e1000_reinit_locked(adapter);
4861                                 else
4862                                         e1000_reset(adapter);
4863                                 break;
4864                         }
4865                 }
4866                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4867                 break;
4868         default:
4869                 return -EOPNOTSUPP;
4870         }
4871         return E1000_SUCCESS;
4872 }
4873
4874 void
4875 e1000_pci_set_mwi(struct e1000_hw *hw)
4876 {
4877         struct e1000_adapter *adapter = hw->back;
4878         int ret_val = pci_set_mwi(adapter->pdev);
4879
4880         if (ret_val)
4881                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4882 }
4883
4884 void
4885 e1000_pci_clear_mwi(struct e1000_hw *hw)
4886 {
4887         struct e1000_adapter *adapter = hw->back;
4888
4889         pci_clear_mwi(adapter->pdev);
4890 }
4891
4892 void
4893 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4894 {
4895         struct e1000_adapter *adapter = hw->back;
4896
4897         pci_read_config_word(adapter->pdev, reg, value);
4898 }
4899
4900 void
4901 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4902 {
4903         struct e1000_adapter *adapter = hw->back;
4904
4905         pci_write_config_word(adapter->pdev, reg, *value);
4906 }
4907
4908 int32_t
4909 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4910 {
4911     struct e1000_adapter *adapter = hw->back;
4912     uint16_t cap_offset;
4913
4914     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4915     if (!cap_offset)
4916         return -E1000_ERR_CONFIG;
4917
4918     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4919
4920     return E1000_SUCCESS;
4921 }
4922
4923 void
4924 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4925 {
4926         outl(value, port);
4927 }
4928
4929 static void
4930 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4931 {
4932         struct e1000_adapter *adapter = netdev_priv(netdev);
4933         uint32_t ctrl, rctl;
4934
4935         e1000_irq_disable(adapter);
4936         adapter->vlgrp = grp;
4937
4938         if (grp) {
4939                 /* enable VLAN tag insert/strip */
4940                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4941                 ctrl |= E1000_CTRL_VME;
4942                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4943
4944                 if (adapter->hw.mac_type != e1000_ich8lan) {
4945                         /* enable VLAN receive filtering */
4946                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4947                         rctl |= E1000_RCTL_VFE;
4948                         rctl &= ~E1000_RCTL_CFIEN;
4949                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4950                         e1000_update_mng_vlan(adapter);
4951                 }
4952         } else {
4953                 /* disable VLAN tag insert/strip */
4954                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4955                 ctrl &= ~E1000_CTRL_VME;
4956                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4957
4958                 if (adapter->hw.mac_type != e1000_ich8lan) {
4959                         /* disable VLAN filtering */
4960                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4961                         rctl &= ~E1000_RCTL_VFE;
4962                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4963                         if (adapter->mng_vlan_id !=
4964                             (uint16_t)E1000_MNG_VLAN_NONE) {
4965                                 e1000_vlan_rx_kill_vid(netdev,
4966                                                        adapter->mng_vlan_id);
4967                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4968                         }
4969                 }
4970         }
4971
4972         e1000_irq_enable(adapter);
4973 }
4974
4975 static void
4976 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4977 {
4978         struct e1000_adapter *adapter = netdev_priv(netdev);
4979         uint32_t vfta, index;
4980
4981         if ((adapter->hw.mng_cookie.status &
4982              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4983             (vid == adapter->mng_vlan_id))
4984                 return;
4985         /* add VID to filter table */
4986         index = (vid >> 5) & 0x7F;
4987         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4988         vfta |= (1 << (vid & 0x1F));
4989         e1000_write_vfta(&adapter->hw, index, vfta);
4990 }
4991
4992 static void
4993 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4994 {
4995         struct e1000_adapter *adapter = netdev_priv(netdev);
4996         uint32_t vfta, index;
4997
4998         e1000_irq_disable(adapter);
4999         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5000         e1000_irq_enable(adapter);
5001
5002         if ((adapter->hw.mng_cookie.status &
5003              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5004             (vid == adapter->mng_vlan_id)) {
5005                 /* release control to f/w */
5006                 e1000_release_hw_control(adapter);
5007                 return;
5008         }
5009
5010         /* remove VID from filter table */
5011         index = (vid >> 5) & 0x7F;
5012         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5013         vfta &= ~(1 << (vid & 0x1F));
5014         e1000_write_vfta(&adapter->hw, index, vfta);
5015 }
5016
5017 static void
5018 e1000_restore_vlan(struct e1000_adapter *adapter)
5019 {
5020         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5021
5022         if (adapter->vlgrp) {
5023                 uint16_t vid;
5024                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5025                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5026                                 continue;
5027                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5028                 }
5029         }
5030 }
5031
5032 int
5033 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5034 {
5035         adapter->hw.autoneg = 0;
5036
5037         /* Fiber NICs only allow 1000 gbps Full duplex */
5038         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5039                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5040                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5041                 return -EINVAL;
5042         }
5043
5044         switch (spddplx) {
5045         case SPEED_10 + DUPLEX_HALF:
5046                 adapter->hw.forced_speed_duplex = e1000_10_half;
5047                 break;
5048         case SPEED_10 + DUPLEX_FULL:
5049                 adapter->hw.forced_speed_duplex = e1000_10_full;
5050                 break;
5051         case SPEED_100 + DUPLEX_HALF:
5052                 adapter->hw.forced_speed_duplex = e1000_100_half;
5053                 break;
5054         case SPEED_100 + DUPLEX_FULL:
5055                 adapter->hw.forced_speed_duplex = e1000_100_full;
5056                 break;
5057         case SPEED_1000 + DUPLEX_FULL:
5058                 adapter->hw.autoneg = 1;
5059                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5060                 break;
5061         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5062         default:
5063                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5064                 return -EINVAL;
5065         }
5066         return 0;
5067 }
5068
5069 static int
5070 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5071 {
5072         struct net_device *netdev = pci_get_drvdata(pdev);
5073         struct e1000_adapter *adapter = netdev_priv(netdev);
5074         uint32_t ctrl, ctrl_ext, rctl, status;
5075         uint32_t wufc = adapter->wol;
5076 #ifdef CONFIG_PM
5077         int retval = 0;
5078 #endif
5079
5080         netif_device_detach(netdev);
5081
5082         if (netif_running(netdev)) {
5083                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5084                 e1000_down(adapter);
5085         }
5086
5087 #ifdef CONFIG_PM
5088         retval = pci_save_state(pdev);
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         pci_restore_state(pdev);
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 */