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 const char e1000_driver_version[] = DRV_VERSION;
  41 static const 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 #ifdef CONFIG_E1000E_ENABLED
  51   #define PCIE(x)
  52 #else
  53   #define PCIE(x) x,
  54 #endif
  55
  56 static struct pci_device_id e1000_pci_tbl[] = {
  57         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  58         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  62         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  65         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  76         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  78         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  79         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  82 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1049))
  83 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104A))
  84 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104B))
  85 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104C))
  86 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104D))
  87 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x105E))
  88 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x105F))
  89 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1060))
  90         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  91         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  94         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  95         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  96         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  97         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  98 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107D))
  99 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107E))
 100 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107F))
 101         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 102 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x108B))
 103 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x108C))
 104 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1096))
 105 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1098))
 106         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 107 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x109A))
 108 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10A4))
 109 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10A5))
 110         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 111 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10B9))
 112 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BA))
 113 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BB))
 114 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BC))
 115 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10C4))
 116 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10C5))
 117 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10D5))
 118 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10D9))
 119 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10DA))
 120         /* required last entry */
 121         {0,}
 122 };
 123
 124 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 125
 126 int e1000_up(struct e1000_adapter *adapter);
 127 void e1000_down(struct e1000_adapter *adapter);
 128 void e1000_reinit_locked(struct e1000_adapter *adapter);
 129 void e1000_reset(struct e1000_adapter *adapter);
 130 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 131 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 132 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 133 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 134 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 135 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 136                              struct e1000_tx_ring *txdr);
 137 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 138                              struct e1000_rx_ring *rxdr);
 139 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 140                              struct e1000_tx_ring *tx_ring);
 141 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 142                              struct e1000_rx_ring *rx_ring);
 143 void e1000_update_stats(struct e1000_adapter *adapter);
 144
 145 static int e1000_init_module(void);
 146 static void e1000_exit_module(void);
 147 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 148 static void __devexit e1000_remove(struct pci_dev *pdev);
 149 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 150 static int e1000_sw_init(struct e1000_adapter *adapter);
 151 static int e1000_open(struct net_device *netdev);
 152 static int e1000_close(struct net_device *netdev);
 153 static void e1000_configure_tx(struct e1000_adapter *adapter);
 154 static void e1000_configure_rx(struct e1000_adapter *adapter);
 155 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 156 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 157 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 158 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 159                                 struct e1000_tx_ring *tx_ring);
 160 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 161                                 struct e1000_rx_ring *rx_ring);
 162 static void e1000_set_rx_mode(struct net_device *netdev);
 163 static void e1000_update_phy_info(unsigned long data);
 164 static void e1000_watchdog(unsigned long data);
 165 static void e1000_82547_tx_fifo_stall(unsigned long data);
 166 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 167 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 168 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 169 static int e1000_set_mac(struct net_device *netdev, void *p);
 170 static irqreturn_t e1000_intr(int irq, void *data);
 171 static irqreturn_t e1000_intr_msi(int irq, void *data);
 172 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 173                                     struct e1000_tx_ring *tx_ring);
 174 #ifdef CONFIG_E1000_NAPI
 175 static int e1000_clean(struct napi_struct *napi, int budget);
 176 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 177                                     struct e1000_rx_ring *rx_ring,
 178                                     int *work_done, int work_to_do);
 179 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 180                                        struct e1000_rx_ring *rx_ring,
 181                                        int *work_done, int work_to_do);
 182 #else
 183 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 184                                     struct e1000_rx_ring *rx_ring);
 185 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 186                                        struct e1000_rx_ring *rx_ring);
 187 #endif
 188 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 189                                    struct e1000_rx_ring *rx_ring,
 190                                    int cleaned_count);
 191 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 192                                       struct e1000_rx_ring *rx_ring,
 193                                       int cleaned_count);
 194 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 195 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 196                            int cmd);
 197 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 198 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 199 static void e1000_tx_timeout(struct net_device *dev);
 200 static void e1000_reset_task(struct work_struct *work);
 201 static void e1000_smartspeed(struct e1000_adapter *adapter);
 202 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 203                                        struct sk_buff *skb);
 204
 205 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 206 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 207 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 208 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 209
 210 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 211 #ifdef CONFIG_PM
 212 static int e1000_resume(struct pci_dev *pdev);
 213 #endif
 214 static void e1000_shutdown(struct pci_dev *pdev);
 215
 216 #ifdef CONFIG_NET_POLL_CONTROLLER
 217 /* for netdump / net console */
 218 static void e1000_netpoll (struct net_device *netdev);
 219 #endif
 220
 221 #define COPYBREAK_DEFAULT 256
 222 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
 223 module_param(copybreak, uint, 0644);
 224 MODULE_PARM_DESC(copybreak,
 225         "Maximum size of packet that is copied to a new buffer on receive");
 226
 227 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 228                      pci_channel_state_t state);
 229 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 230 static void e1000_io_resume(struct pci_dev *pdev);
 231
 232 static struct pci_error_handlers e1000_err_handler = {
 233         .error_detected = e1000_io_error_detected,
 234         .slot_reset = e1000_io_slot_reset,
 235         .resume = e1000_io_resume,
 236 };
 237
 238 static struct pci_driver e1000_driver = {
 239         .name     = e1000_driver_name,
 240         .id_table = e1000_pci_tbl,
 241         .probe    = e1000_probe,
 242         .remove   = __devexit_p(e1000_remove),
 243 #ifdef CONFIG_PM
 244         /* Power Managment Hooks */
 245         .suspend  = e1000_suspend,
 246         .resume   = e1000_resume,
 247 #endif
 248         .shutdown = e1000_shutdown,
 249         .err_handler = &e1000_err_handler
 250 };
 251
 252 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 253 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 254 MODULE_LICENSE("GPL");
 255 MODULE_VERSION(DRV_VERSION);
 256
 257 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 258 module_param(debug, int, 0);
 259 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 260
 261 /**
 262  * e1000_init_module - Driver Registration Routine
 263  *
 264  * e1000_init_module is the first routine called when the driver is
 265  * loaded. All it does is register with the PCI subsystem.
 266  **/
 267
 268 static int __init
 269 e1000_init_module(void)
 270 {
 271         int ret;
 272         printk(KERN_INFO "%s - version %s\n",
 273                e1000_driver_string, e1000_driver_version);
 274
 275         printk(KERN_INFO "%s\n", e1000_copyright);
 276
 277         ret = pci_register_driver(&e1000_driver);
 278         if (copybreak != COPYBREAK_DEFAULT) {
 279                 if (copybreak == 0)
 280                         printk(KERN_INFO "e1000: copybreak disabled\n");
 281                 else
 282                         printk(KERN_INFO "e1000: copybreak enabled for "
 283                                "packets <= %u bytes\n", copybreak);
 284         }
 285         return ret;
 286 }
 287
 288 module_init(e1000_init_module);
 289
 290 /**
 291  * e1000_exit_module - Driver Exit Cleanup Routine
 292  *
 293  * e1000_exit_module is called just before the driver is removed
 294  * from memory.
 295  **/
 296
 297 static void __exit
 298 e1000_exit_module(void)
 299 {
 300         pci_unregister_driver(&e1000_driver);
 301 }
 302
 303 module_exit(e1000_exit_module);
 304
 305 static int e1000_request_irq(struct e1000_adapter *adapter)
 306 {
 307         struct net_device *netdev = adapter->netdev;
 308         irq_handler_t handler = e1000_intr;
 309         int irq_flags = IRQF_SHARED;
 310         int err;
 311
 312         if (adapter->hw.mac_type >= e1000_82571) {
 313                 adapter->have_msi = !pci_enable_msi(adapter->pdev);
 314                 if (adapter->have_msi) {
 315                         handler = e1000_intr_msi;
 316                         irq_flags = 0;
 317                 }
 318         }
 319
 320         err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
 321                           netdev);
 322         if (err) {
 323                 if (adapter->have_msi)
 324                         pci_disable_msi(adapter->pdev);
 325                 DPRINTK(PROBE, ERR,
 326                         "Unable to allocate interrupt Error: %d\n", err);
 327         }
 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         if (adapter->have_msi)
 339                 pci_disable_msi(adapter->pdev);
 340 }
 341
 342 /**
 343  * e1000_irq_disable - Mask off interrupt generation on the NIC
 344  * @adapter: board private structure
 345  **/
 346
 347 static void
 348 e1000_irq_disable(struct e1000_adapter *adapter)
 349 {
 350         atomic_inc(&adapter->irq_sem);
 351         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 352         E1000_WRITE_FLUSH(&adapter->hw);
 353         synchronize_irq(adapter->pdev->irq);
 354 }
 355
 356 /**
 357  * e1000_irq_enable - Enable default interrupt generation settings
 358  * @adapter: board private structure
 359  **/
 360
 361 static void
 362 e1000_irq_enable(struct e1000_adapter *adapter)
 363 {
 364         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 365                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 366                 E1000_WRITE_FLUSH(&adapter->hw);
 367         }
 368 }
 369
 370 static void
 371 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 372 {
 373         struct net_device *netdev = adapter->netdev;
 374         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 375         uint16_t old_vid = adapter->mng_vlan_id;
 376         if (adapter->vlgrp) {
 377                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 378                         if (adapter->hw.mng_cookie.status &
 379                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 380                                 e1000_vlan_rx_add_vid(netdev, vid);
 381                                 adapter->mng_vlan_id = vid;
 382                         } else
 383                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 384
 385                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 386                                         (vid != old_vid) &&
 387                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 388                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 389                 } else
 390                         adapter->mng_vlan_id = vid;
 391         }
 392 }
 393
 394 /**
 395  * e1000_release_hw_control - release control of the h/w to f/w
 396  * @adapter: address of board private structure
 397  *
 398  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 399  * For ASF and Pass Through versions of f/w this means that the
 400  * driver is no longer loaded. For AMT version (only with 82573) i
 401  * of the f/w this means that the network i/f is closed.
 402  *
 403  **/
 404
 405 static void
 406 e1000_release_hw_control(struct e1000_adapter *adapter)
 407 {
 408         uint32_t ctrl_ext;
 409         uint32_t swsm;
 410
 411         /* Let firmware taken over control of h/w */
 412         switch (adapter->hw.mac_type) {
 413         case e1000_82573:
 414                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 415                 E1000_WRITE_REG(&adapter->hw, SWSM,
 416                                 swsm & ~E1000_SWSM_DRV_LOAD);
 417                 break;
 418         case e1000_82571:
 419         case e1000_82572:
 420         case e1000_80003es2lan:
 421         case e1000_ich8lan:
 422                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 423                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 424                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 425                 break;
 426         default:
 427                 break;
 428         }
 429 }
 430
 431 /**
 432  * e1000_get_hw_control - get control of the h/w from f/w
 433  * @adapter: address of board private structure
 434  *
 435  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 436  * For ASF and Pass Through versions of f/w this means that
 437  * the driver is loaded. For AMT version (only with 82573)
 438  * of the f/w this means that the network i/f is open.
 439  *
 440  **/
 441
 442 static void
 443 e1000_get_hw_control(struct e1000_adapter *adapter)
 444 {
 445         uint32_t ctrl_ext;
 446         uint32_t swsm;
 447
 448         /* Let firmware know the driver has taken over */
 449         switch (adapter->hw.mac_type) {
 450         case e1000_82573:
 451                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 452                 E1000_WRITE_REG(&adapter->hw, SWSM,
 453                                 swsm | E1000_SWSM_DRV_LOAD);
 454                 break;
 455         case e1000_82571:
 456         case e1000_82572:
 457         case e1000_80003es2lan:
 458         case e1000_ich8lan:
 459                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 460                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 461                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 462                 break;
 463         default:
 464                 break;
 465         }
 466 }
 467
 468 static void
 469 e1000_init_manageability(struct e1000_adapter *adapter)
 470 {
 471         if (adapter->en_mng_pt) {
 472                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 473
 474                 /* disable hardware interception of ARP */
 475                 manc &= ~(E1000_MANC_ARP_EN);
 476
 477                 /* enable receiving management packets to the host */
 478                 /* this will probably generate destination unreachable messages
 479                  * from the host OS, but the packets will be handled on SMBUS */
 480                 if (adapter->hw.has_manc2h) {
 481                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
 482
 483                         manc |= E1000_MANC_EN_MNG2HOST;
 484 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 485 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 486                         manc2h |= E1000_MNG2HOST_PORT_623;
 487                         manc2h |= E1000_MNG2HOST_PORT_664;
 488                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
 489                 }
 490
 491                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 492         }
 493 }
 494
 495 static void
 496 e1000_release_manageability(struct e1000_adapter *adapter)
 497 {
 498         if (adapter->en_mng_pt) {
 499                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 500
 501                 /* re-enable hardware interception of ARP */
 502                 manc |= E1000_MANC_ARP_EN;
 503
 504                 if (adapter->hw.has_manc2h)
 505                         manc &= ~E1000_MANC_EN_MNG2HOST;
 506
 507                 /* don't explicitly have to mess with MANC2H since
 508                  * MANC has an enable disable that gates MANC2H */
 509
 510                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 511         }
 512 }
 513
 514 /**
 515  * e1000_configure - configure the hardware for RX and TX
 516  * @adapter = private board structure
 517  **/
 518 static void e1000_configure(struct e1000_adapter *adapter)
 519 {
 520         struct net_device *netdev = adapter->netdev;
 521         int i;
 522
 523         e1000_set_rx_mode(netdev);
 524
 525         e1000_restore_vlan(adapter);
 526         e1000_init_manageability(adapter);
 527
 528         e1000_configure_tx(adapter);
 529         e1000_setup_rctl(adapter);
 530         e1000_configure_rx(adapter);
 531         /* call E1000_DESC_UNUSED which always leaves
 532          * at least 1 descriptor unused to make sure
 533          * next_to_use != next_to_clean */
 534         for (i = 0; i < adapter->num_rx_queues; i++) {
 535                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 536                 adapter->alloc_rx_buf(adapter, ring,
 537                                       E1000_DESC_UNUSED(ring));
 538         }
 539
 540         adapter->tx_queue_len = netdev->tx_queue_len;
 541 }
 542
 543 int e1000_up(struct e1000_adapter *adapter)
 544 {
 545         /* hardware has been reset, we need to reload some things */
 546         e1000_configure(adapter);
 547
 548         clear_bit(__E1000_DOWN, &adapter->flags);
 549
 550 #ifdef CONFIG_E1000_NAPI
 551         napi_enable(&adapter->napi);
 552 #endif
 553         e1000_irq_enable(adapter);
 554
 555         /* fire a link change interrupt to start the watchdog */
 556         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
 557         return 0;
 558 }
 559
 560 /**
 561  * e1000_power_up_phy - restore link in case the phy was powered down
 562  * @adapter: address of board private structure
 563  *
 564  * The phy may be powered down to save power and turn off link when the
 565  * driver is unloaded and wake on lan is not enabled (among others)
 566  * *** this routine MUST be followed by a call to e1000_reset ***
 567  *
 568  **/
 569
 570 void e1000_power_up_phy(struct e1000_adapter *adapter)
 571 {
 572         uint16_t mii_reg = 0;
 573
 574         /* Just clear the power down bit to wake the phy back up */
 575         if (adapter->hw.media_type == e1000_media_type_copper) {
 576                 /* according to the manual, the phy will retain its
 577                  * settings across a power-down/up cycle */
 578                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 579                 mii_reg &= ~MII_CR_POWER_DOWN;
 580                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 581         }
 582 }
 583
 584 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 585 {
 586         /* Power down the PHY so no link is implied when interface is down *
 587          * The PHY cannot be powered down if any of the following is TRUE *
 588          * (a) WoL is enabled
 589          * (b) AMT is active
 590          * (c) SoL/IDER session is active */
 591         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 592            adapter->hw.media_type == e1000_media_type_copper) {
 593                 uint16_t mii_reg = 0;
 594
 595                 switch (adapter->hw.mac_type) {
 596                 case e1000_82540:
 597                 case e1000_82545:
 598                 case e1000_82545_rev_3:
 599                 case e1000_82546:
 600                 case e1000_82546_rev_3:
 601                 case e1000_82541:
 602                 case e1000_82541_rev_2:
 603                 case e1000_82547:
 604                 case e1000_82547_rev_2:
 605                         if (E1000_READ_REG(&adapter->hw, MANC) &
 606                             E1000_MANC_SMBUS_EN)
 607                                 goto out;
 608                         break;
 609                 case e1000_82571:
 610                 case e1000_82572:
 611                 case e1000_82573:
 612                 case e1000_80003es2lan:
 613                 case e1000_ich8lan:
 614                         if (e1000_check_mng_mode(&adapter->hw) ||
 615                             e1000_check_phy_reset_block(&adapter->hw))
 616                                 goto out;
 617                         break;
 618                 default:
 619                         goto out;
 620                 }
 621                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 622                 mii_reg |= MII_CR_POWER_DOWN;
 623                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 624                 mdelay(1);
 625         }
 626 out:
 627         return;
 628 }
 629
 630 void
 631 e1000_down(struct e1000_adapter *adapter)
 632 {
 633         struct net_device *netdev = adapter->netdev;
 634
 635         /* signal that we're down so the interrupt handler does not
 636          * reschedule our watchdog timer */
 637         set_bit(__E1000_DOWN, &adapter->flags);
 638
 639 #ifdef CONFIG_E1000_NAPI
 640         napi_disable(&adapter->napi);
 641         atomic_set(&adapter->irq_sem, 0);
 642 #endif
 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         netdev->tx_queue_len = adapter->tx_queue_len;
 650         adapter->link_speed = 0;
 651         adapter->link_duplex = 0;
 652         netif_carrier_off(netdev);
 653         netif_stop_queue(netdev);
 654
 655         e1000_reset(adapter);
 656         e1000_clean_all_tx_rings(adapter);
 657         e1000_clean_all_rx_rings(adapter);
 658 }
 659
 660 void
 661 e1000_reinit_locked(struct e1000_adapter *adapter)
 662 {
 663         WARN_ON(in_interrupt());
 664         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 665                 msleep(1);
 666         e1000_down(adapter);
 667         e1000_up(adapter);
 668         clear_bit(__E1000_RESETTING, &adapter->flags);
 669 }
 670
 671 void
 672 e1000_reset(struct e1000_adapter *adapter)
 673 {
 674         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
 675         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 676         boolean_t legacy_pba_adjust = FALSE;
 677
 678         /* Repartition Pba for greater than 9k mtu
 679          * To take effect CTRL.RST is required.
 680          */
 681
 682         switch (adapter->hw.mac_type) {
 683         case e1000_82542_rev2_0:
 684         case e1000_82542_rev2_1:
 685         case e1000_82543:
 686         case e1000_82544:
 687         case e1000_82540:
 688         case e1000_82541:
 689         case e1000_82541_rev_2:
 690                 legacy_pba_adjust = TRUE;
 691                 pba = E1000_PBA_48K;
 692                 break;
 693         case e1000_82545:
 694         case e1000_82545_rev_3:
 695         case e1000_82546:
 696         case e1000_82546_rev_3:
 697                 pba = E1000_PBA_48K;
 698                 break;
 699         case e1000_82547:
 700         case e1000_82547_rev_2:
 701                 legacy_pba_adjust = TRUE;
 702                 pba = E1000_PBA_30K;
 703                 break;
 704         case e1000_82571:
 705         case e1000_82572:
 706         case e1000_80003es2lan:
 707                 pba = E1000_PBA_38K;
 708                 break;
 709         case e1000_82573:
 710                 pba = E1000_PBA_20K;
 711                 break;
 712         case e1000_ich8lan:
 713                 pba = E1000_PBA_8K;
 714         case e1000_undefined:
 715         case e1000_num_macs:
 716                 break;
 717         }
 718
 719         if (legacy_pba_adjust == TRUE) {
 720                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 721                         pba -= 8; /* allocate more FIFO for Tx */
 722
 723                 if (adapter->hw.mac_type == e1000_82547) {
 724                         adapter->tx_fifo_head = 0;
 725                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 726                         adapter->tx_fifo_size =
 727                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 728                         atomic_set(&adapter->tx_fifo_stall, 0);
 729                 }
 730         } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 731                 /* adjust PBA for jumbo frames */
 732                 E1000_WRITE_REG(&adapter->hw, PBA, pba);
 733
 734                 /* To maintain wire speed transmits, the Tx FIFO should be
 735                  * large enough to accomodate two full transmit packets,
 736                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 737                  * the Rx FIFO should be large enough to accomodate at least
 738                  * one full receive packet and is similarly rounded up and
 739                  * expressed in KB. */
 740                 pba = E1000_READ_REG(&adapter->hw, PBA);
 741                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 742                 tx_space = pba >> 16;
 743                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 744                 pba &= 0xffff;
 745                 /* don't include ethernet FCS because hardware appends/strips */
 746                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 747                                VLAN_TAG_SIZE;
 748                 min_tx_space = min_rx_space;
 749                 min_tx_space *= 2;
 750                 min_tx_space = ALIGN(min_tx_space, 1024);
 751                 min_tx_space >>= 10;
 752                 min_rx_space = ALIGN(min_rx_space, 1024);
 753                 min_rx_space >>= 10;
 754
 755                 /* If current Tx allocation is less than the min Tx FIFO size,
 756                  * and the min Tx FIFO size is less than the current Rx FIFO
 757                  * allocation, take space away from current Rx allocation */
 758                 if (tx_space < min_tx_space &&
 759                     ((min_tx_space - tx_space) < pba)) {
 760                         pba = pba - (min_tx_space - tx_space);
 761
 762                         /* PCI/PCIx hardware has PBA alignment constraints */
 763                         switch (adapter->hw.mac_type) {
 764                         case e1000_82545 ... e1000_82546_rev_3:
 765                                 pba &= ~(E1000_PBA_8K - 1);
 766                                 break;
 767                         default:
 768                                 break;
 769                         }
 770
 771                         /* if short on rx space, rx wins and must trump tx
 772                          * adjustment or use Early Receive if available */
 773                         if (pba < min_rx_space) {
 774                                 switch (adapter->hw.mac_type) {
 775                                 case e1000_82573:
 776                                         /* ERT enabled in e1000_configure_rx */
 777                                         break;
 778                                 default:
 779                                         pba = min_rx_space;
 780                                         break;
 781                                 }
 782                         }
 783                 }
 784         }
 785
 786         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 787
 788         /* flow control settings */
 789         /* Set the FC high water mark to 90% of the FIFO size.
 790          * Required to clear last 3 LSB */
 791         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 792         /* We can't use 90% on small FIFOs because the remainder
 793          * would be less than 1 full frame.  In this case, we size
 794          * it to allow at least a full frame above the high water
 795          *  mark. */
 796         if (pba < E1000_PBA_16K)
 797                 fc_high_water_mark = (pba * 1024) - 1600;
 798
 799         adapter->hw.fc_high_water = fc_high_water_mark;
 800         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 801         if (adapter->hw.mac_type == e1000_80003es2lan)
 802                 adapter->hw.fc_pause_time = 0xFFFF;
 803         else
 804                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 805         adapter->hw.fc_send_xon = 1;
 806         adapter->hw.fc = adapter->hw.original_fc;
 807
 808         /* Allow time for pending master requests to run */
 809         e1000_reset_hw(&adapter->hw);
 810         if (adapter->hw.mac_type >= e1000_82544)
 811                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 812
 813         if (e1000_init_hw(&adapter->hw))
 814                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 815         e1000_update_mng_vlan(adapter);
 816
 817         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 818         if (adapter->hw.mac_type >= e1000_82544 &&
 819             adapter->hw.mac_type <= e1000_82547_rev_2 &&
 820             adapter->hw.autoneg == 1 &&
 821             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
 822                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
 823                 /* clear phy power management bit if we are in gig only mode,
 824                  * which if enabled will attempt negotiation to 100Mb, which
 825                  * can cause a loss of link at power off or driver unload */
 826                 ctrl &= ~E1000_CTRL_SWDPIN3;
 827                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
 828         }
 829
 830         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 831         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 832
 833         e1000_reset_adaptive(&adapter->hw);
 834         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 835
 836         if (!adapter->smart_power_down &&
 837             (adapter->hw.mac_type == e1000_82571 ||
 838              adapter->hw.mac_type == e1000_82572)) {
 839                 uint16_t phy_data = 0;
 840                 /* speed up time to link by disabling smart power down, ignore
 841                  * the return value of this function because there is nothing
 842                  * different we would do if it failed */
 843                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 844                                    &phy_data);
 845                 phy_data &= ~IGP02E1000_PM_SPD;
 846                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 847                                     phy_data);
 848         }
 849
 850         e1000_release_manageability(adapter);
 851 }
 852
 853 /**
 854  *  Dump the eeprom for users having checksum issues
 855  **/
 856 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
 857 {
 858         struct net_device *netdev = adapter->netdev;
 859         struct ethtool_eeprom eeprom;
 860         const struct ethtool_ops *ops = netdev->ethtool_ops;
 861         u8 *data;
 862         int i;
 863         u16 csum_old, csum_new = 0;
 864
 865         eeprom.len = ops->get_eeprom_len(netdev);
 866         eeprom.offset = 0;
 867
 868         data = kmalloc(eeprom.len, GFP_KERNEL);
 869         if (!data) {
 870                 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
 871                        " data\n");
 872                 return;
 873         }
 874
 875         ops->get_eeprom(netdev, &eeprom, data);
 876
 877         csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
 878                    (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
 879         for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
 880                 csum_new += data[i] + (data[i + 1] << 8);
 881         csum_new = EEPROM_SUM - csum_new;
 882
 883         printk(KERN_ERR "/*********************/\n");
 884         printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
 885         printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
 886
 887         printk(KERN_ERR "Offset    Values\n");
 888         printk(KERN_ERR "========  ======\n");
 889         print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
 890
 891         printk(KERN_ERR "Include this output when contacting your support "
 892                "provider.\n");
 893         printk(KERN_ERR "This is not a software error! Something bad "
 894                "happened to your hardware or\n");
 895         printk(KERN_ERR "EEPROM image. Ignoring this "
 896                "problem could result in further problems,\n");
 897         printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
 898         printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
 899                "which is invalid\n");
 900         printk(KERN_ERR "and requires you to set the proper MAC "
 901                "address manually before continuing\n");
 902         printk(KERN_ERR "to enable this network device.\n");
 903         printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
 904                "to your hardware vendor\n");
 905         printk(KERN_ERR "or Intel Customer Support: linux-nics@intel.com\n");
 906         printk(KERN_ERR "/*********************/\n");
 907
 908         kfree(data);
 909 }
 910
 911 /**
 912  * e1000_probe - Device Initialization Routine
 913  * @pdev: PCI device information struct
 914  * @ent: entry in e1000_pci_tbl
 915  *
 916  * Returns 0 on success, negative on failure
 917  *
 918  * e1000_probe initializes an adapter identified by a pci_dev structure.
 919  * The OS initialization, configuring of the adapter private structure,
 920  * and a hardware reset occur.
 921  **/
 922
 923 static int __devinit
 924 e1000_probe(struct pci_dev *pdev,
 925             const struct pci_device_id *ent)
 926 {
 927         struct net_device *netdev;
 928         struct e1000_adapter *adapter;
 929
 930         static int cards_found = 0;
 931         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 932         int i, err, pci_using_dac;
 933         uint16_t eeprom_data = 0;
 934         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 935         DECLARE_MAC_BUF(mac);
 936
 937         if ((err = pci_enable_device(pdev)))
 938                 return err;
 939
 940         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 941             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 942                 pci_using_dac = 1;
 943         } else {
 944                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 945                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 946                         E1000_ERR("No usable DMA configuration, aborting\n");
 947                         goto err_dma;
 948                 }
 949                 pci_using_dac = 0;
 950         }
 951
 952         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 953                 goto err_pci_reg;
 954
 955         pci_set_master(pdev);
 956
 957         err = -ENOMEM;
 958         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 959         if (!netdev)
 960                 goto err_alloc_etherdev;
 961
 962         SET_NETDEV_DEV(netdev, &pdev->dev);
 963
 964         pci_set_drvdata(pdev, netdev);
 965         adapter = netdev_priv(netdev);
 966         adapter->netdev = netdev;
 967         adapter->pdev = pdev;
 968         adapter->hw.back = adapter;
 969         adapter->msg_enable = (1 << debug) - 1;
 970
 971         err = -EIO;
 972         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
 973                                       pci_resource_len(pdev, BAR_0));
 974         if (!adapter->hw.hw_addr)
 975                 goto err_ioremap;
 976
 977         for (i = BAR_1; i <= BAR_5; i++) {
 978                 if (pci_resource_len(pdev, i) == 0)
 979                         continue;
 980                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 981                         adapter->hw.io_base = pci_resource_start(pdev, i);
 982                         break;
 983                 }
 984         }
 985
 986         netdev->open = &e1000_open;
 987         netdev->stop = &e1000_close;
 988         netdev->hard_start_xmit = &e1000_xmit_frame;
 989         netdev->get_stats = &e1000_get_stats;
 990         netdev->set_rx_mode = &e1000_set_rx_mode;
 991         netdev->set_mac_address = &e1000_set_mac;
 992         netdev->change_mtu = &e1000_change_mtu;
 993         netdev->do_ioctl = &e1000_ioctl;
 994         e1000_set_ethtool_ops(netdev);
 995         netdev->tx_timeout = &e1000_tx_timeout;
 996         netdev->watchdog_timeo = 5 * HZ;
 997 #ifdef CONFIG_E1000_NAPI
 998         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
 999 #endif
1000         netdev->vlan_rx_register = e1000_vlan_rx_register;
1001         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
1002         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
1003 #ifdef CONFIG_NET_POLL_CONTROLLER
1004         netdev->poll_controller = e1000_netpoll;
1005 #endif
1006         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1007
1008         adapter->bd_number = cards_found;
1009
1010         /* setup the private structure */
1011
1012         if ((err = e1000_sw_init(adapter)))
1013                 goto err_sw_init;
1014
1015         err = -EIO;
1016         /* Flash BAR mapping must happen after e1000_sw_init
1017          * because it depends on mac_type */
1018         if ((adapter->hw.mac_type == e1000_ich8lan) &&
1019            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1020                 adapter->hw.flash_address =
1021                         ioremap(pci_resource_start(pdev, 1),
1022                                 pci_resource_len(pdev, 1));
1023                 if (!adapter->hw.flash_address)
1024                         goto err_flashmap;
1025         }
1026
1027         if (e1000_check_phy_reset_block(&adapter->hw))
1028                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1029
1030         if (adapter->hw.mac_type >= e1000_82543) {
1031                 netdev->features = NETIF_F_SG |
1032                                    NETIF_F_HW_CSUM |
1033                                    NETIF_F_HW_VLAN_TX |
1034                                    NETIF_F_HW_VLAN_RX |
1035                                    NETIF_F_HW_VLAN_FILTER;
1036                 if (adapter->hw.mac_type == e1000_ich8lan)
1037                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1038         }
1039
1040         if ((adapter->hw.mac_type >= e1000_82544) &&
1041            (adapter->hw.mac_type != e1000_82547))
1042                 netdev->features |= NETIF_F_TSO;
1043
1044         if (adapter->hw.mac_type > e1000_82547_rev_2)
1045                 netdev->features |= NETIF_F_TSO6;
1046         if (pci_using_dac)
1047                 netdev->features |= NETIF_F_HIGHDMA;
1048
1049         netdev->features |= NETIF_F_LLTX;
1050
1051         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1052
1053         /* initialize eeprom parameters */
1054         if (e1000_init_eeprom_params(&adapter->hw)) {
1055                 E1000_ERR("EEPROM initialization failed\n");
1056                 goto err_eeprom;
1057         }
1058
1059         /* before reading the EEPROM, reset the controller to
1060          * put the device in a known good starting state */
1061
1062         e1000_reset_hw(&adapter->hw);
1063
1064         /* make sure the EEPROM is good */
1065         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1066                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1067                 e1000_dump_eeprom(adapter);
1068                 /*
1069                  * set MAC address to all zeroes to invalidate and temporary
1070                  * disable this device for the user. This blocks regular
1071                  * traffic while still permitting ethtool ioctls from reaching
1072                  * the hardware as well as allowing the user to run the
1073                  * interface after manually setting a hw addr using
1074                  * `ip set address`
1075                  */
1076                 memset(adapter->hw.mac_addr, 0, netdev->addr_len);
1077         } else {
1078                 /* copy the MAC address out of the EEPROM */
1079                 if (e1000_read_mac_addr(&adapter->hw))
1080                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1081         }
1082         /* don't block initalization here due to bad MAC address */
1083         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1084         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1085
1086         if (!is_valid_ether_addr(netdev->perm_addr))
1087                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1088
1089         e1000_get_bus_info(&adapter->hw);
1090
1091         init_timer(&adapter->tx_fifo_stall_timer);
1092         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1093         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1094
1095         init_timer(&adapter->watchdog_timer);
1096         adapter->watchdog_timer.function = &e1000_watchdog;
1097         adapter->watchdog_timer.data = (unsigned long) adapter;
1098
1099         init_timer(&adapter->phy_info_timer);
1100         adapter->phy_info_timer.function = &e1000_update_phy_info;
1101         adapter->phy_info_timer.data = (unsigned long) adapter;
1102
1103         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1104
1105         e1000_check_options(adapter);
1106
1107         /* Initial Wake on LAN setting
1108          * If APM wake is enabled in the EEPROM,
1109          * enable the ACPI Magic Packet filter
1110          */
1111
1112         switch (adapter->hw.mac_type) {
1113         case e1000_82542_rev2_0:
1114         case e1000_82542_rev2_1:
1115         case e1000_82543:
1116                 break;
1117         case e1000_82544:
1118                 e1000_read_eeprom(&adapter->hw,
1119                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1120                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1121                 break;
1122         case e1000_ich8lan:
1123                 e1000_read_eeprom(&adapter->hw,
1124                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1125                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1126                 break;
1127         case e1000_82546:
1128         case e1000_82546_rev_3:
1129         case e1000_82571:
1130         case e1000_80003es2lan:
1131                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1132                         e1000_read_eeprom(&adapter->hw,
1133                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1134                         break;
1135                 }
1136                 /* Fall Through */
1137         default:
1138                 e1000_read_eeprom(&adapter->hw,
1139                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1140                 break;
1141         }
1142         if (eeprom_data & eeprom_apme_mask)
1143                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1144
1145         /* now that we have the eeprom settings, apply the special cases
1146          * where the eeprom may be wrong or the board simply won't support
1147          * wake on lan on a particular port */
1148         switch (pdev->device) {
1149         case E1000_DEV_ID_82546GB_PCIE:
1150                 adapter->eeprom_wol = 0;
1151                 break;
1152         case E1000_DEV_ID_82546EB_FIBER:
1153         case E1000_DEV_ID_82546GB_FIBER:
1154         case E1000_DEV_ID_82571EB_FIBER:
1155                 /* Wake events only supported on port A for dual fiber
1156                  * regardless of eeprom setting */
1157                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1158                         adapter->eeprom_wol = 0;
1159                 break;
1160         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1161         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1162         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1163         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1164         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1165                 /* if quad port adapter, disable WoL on all but port A */
1166                 if (global_quad_port_a != 0)
1167                         adapter->eeprom_wol = 0;
1168                 else
1169                         adapter->quad_port_a = 1;
1170                 /* Reset for multiple quad port adapters */
1171                 if (++global_quad_port_a == 4)
1172                         global_quad_port_a = 0;
1173                 break;
1174         }
1175
1176         /* initialize the wol settings based on the eeprom settings */
1177         adapter->wol = adapter->eeprom_wol;
1178
1179         /* print bus type/speed/width info */
1180         {
1181         struct e1000_hw *hw = &adapter->hw;
1182         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1183                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1184                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1185                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1186                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1187                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1188                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1189                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1190                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1191                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1192                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1193                  "32-bit"));
1194         }
1195
1196         printk("%s\n", print_mac(mac, netdev->dev_addr));
1197
1198         /* reset the hardware with the new settings */
1199         e1000_reset(adapter);
1200
1201         /* If the controller is 82573 and f/w is AMT, do not set
1202          * DRV_LOAD until the interface is up.  For all other cases,
1203          * let the f/w know that the h/w is now under the control
1204          * of the driver. */
1205         if (adapter->hw.mac_type != e1000_82573 ||
1206             !e1000_check_mng_mode(&adapter->hw))
1207                 e1000_get_hw_control(adapter);
1208
1209         /* tell the stack to leave us alone until e1000_open() is called */
1210         netif_carrier_off(netdev);
1211         netif_stop_queue(netdev);
1212
1213         strcpy(netdev->name, "eth%d");
1214         if ((err = register_netdev(netdev)))
1215                 goto err_register;
1216
1217         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1218
1219         cards_found++;
1220         return 0;
1221
1222 err_register:
1223         e1000_release_hw_control(adapter);
1224 err_eeprom:
1225         if (!e1000_check_phy_reset_block(&adapter->hw))
1226                 e1000_phy_hw_reset(&adapter->hw);
1227
1228         if (adapter->hw.flash_address)
1229                 iounmap(adapter->hw.flash_address);
1230 err_flashmap:
1231 #ifdef CONFIG_E1000_NAPI
1232         for (i = 0; i < adapter->num_rx_queues; i++)
1233                 dev_put(&adapter->polling_netdev[i]);
1234 #endif
1235
1236         kfree(adapter->tx_ring);
1237         kfree(adapter->rx_ring);
1238 #ifdef CONFIG_E1000_NAPI
1239         kfree(adapter->polling_netdev);
1240 #endif
1241 err_sw_init:
1242         iounmap(adapter->hw.hw_addr);
1243 err_ioremap:
1244         free_netdev(netdev);
1245 err_alloc_etherdev:
1246         pci_release_regions(pdev);
1247 err_pci_reg:
1248 err_dma:
1249         pci_disable_device(pdev);
1250         return err;
1251 }
1252
1253 /**
1254  * e1000_remove - Device Removal Routine
1255  * @pdev: PCI device information struct
1256  *
1257  * e1000_remove is called by the PCI subsystem to alert the driver
1258  * that it should release a PCI device.  The could be caused by a
1259  * Hot-Plug event, or because the driver is going to be removed from
1260  * memory.
1261  **/
1262
1263 static void __devexit
1264 e1000_remove(struct pci_dev *pdev)
1265 {
1266         struct net_device *netdev = pci_get_drvdata(pdev);
1267         struct e1000_adapter *adapter = netdev_priv(netdev);
1268 #ifdef CONFIG_E1000_NAPI
1269         int i;
1270 #endif
1271
1272         cancel_work_sync(&adapter->reset_task);
1273
1274         e1000_release_manageability(adapter);
1275
1276         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1277          * would have already happened in close and is redundant. */
1278         e1000_release_hw_control(adapter);
1279
1280 #ifdef CONFIG_E1000_NAPI
1281         for (i = 0; i < adapter->num_rx_queues; i++)
1282                 dev_put(&adapter->polling_netdev[i]);
1283 #endif
1284
1285         unregister_netdev(netdev);
1286
1287         if (!e1000_check_phy_reset_block(&adapter->hw))
1288                 e1000_phy_hw_reset(&adapter->hw);
1289
1290         kfree(adapter->tx_ring);
1291         kfree(adapter->rx_ring);
1292 #ifdef CONFIG_E1000_NAPI
1293         kfree(adapter->polling_netdev);
1294 #endif
1295
1296         iounmap(adapter->hw.hw_addr);
1297         if (adapter->hw.flash_address)
1298                 iounmap(adapter->hw.flash_address);
1299         pci_release_regions(pdev);
1300
1301         free_netdev(netdev);
1302
1303         pci_disable_device(pdev);
1304 }
1305
1306 /**
1307  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1308  * @adapter: board private structure to initialize
1309  *
1310  * e1000_sw_init initializes the Adapter private data structure.
1311  * Fields are initialized based on PCI device information and
1312  * OS network device settings (MTU size).
1313  **/
1314
1315 static int __devinit
1316 e1000_sw_init(struct e1000_adapter *adapter)
1317 {
1318         struct e1000_hw *hw = &adapter->hw;
1319         struct net_device *netdev = adapter->netdev;
1320         struct pci_dev *pdev = adapter->pdev;
1321 #ifdef CONFIG_E1000_NAPI
1322         int i;
1323 #endif
1324
1325         /* PCI config space info */
1326
1327         hw->vendor_id = pdev->vendor;
1328         hw->device_id = pdev->device;
1329         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1330         hw->subsystem_id = pdev->subsystem_device;
1331         hw->revision_id = pdev->revision;
1332
1333         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1334
1335         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1336         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1337         hw->max_frame_size = netdev->mtu +
1338                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1339         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1340
1341         /* identify the MAC */
1342
1343         if (e1000_set_mac_type(hw)) {
1344                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1345                 return -EIO;
1346         }
1347
1348         switch (hw->mac_type) {
1349         default:
1350                 break;
1351         case e1000_82541:
1352         case e1000_82547:
1353         case e1000_82541_rev_2:
1354         case e1000_82547_rev_2:
1355                 hw->phy_init_script = 1;
1356                 break;
1357         }
1358
1359         e1000_set_media_type(hw);
1360
1361         hw->wait_autoneg_complete = FALSE;
1362         hw->tbi_compatibility_en = TRUE;
1363         hw->adaptive_ifs = TRUE;
1364
1365         /* Copper options */
1366
1367         if (hw->media_type == e1000_media_type_copper) {
1368                 hw->mdix = AUTO_ALL_MODES;
1369                 hw->disable_polarity_correction = FALSE;
1370                 hw->master_slave = E1000_MASTER_SLAVE;
1371         }
1372
1373         adapter->num_tx_queues = 1;
1374         adapter->num_rx_queues = 1;
1375
1376         if (e1000_alloc_queues(adapter)) {
1377                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1378                 return -ENOMEM;
1379         }
1380
1381 #ifdef CONFIG_E1000_NAPI
1382         for (i = 0; i < adapter->num_rx_queues; i++) {
1383                 adapter->polling_netdev[i].priv = adapter;
1384                 dev_hold(&adapter->polling_netdev[i]);
1385                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1386         }
1387         spin_lock_init(&adapter->tx_queue_lock);
1388 #endif
1389
1390         /* Explicitly disable IRQ since the NIC can be in any state. */
1391         atomic_set(&adapter->irq_sem, 0);
1392         e1000_irq_disable(adapter);
1393
1394         spin_lock_init(&adapter->stats_lock);
1395
1396         set_bit(__E1000_DOWN, &adapter->flags);
1397
1398         return 0;
1399 }
1400
1401 /**
1402  * e1000_alloc_queues - Allocate memory for all rings
1403  * @adapter: board private structure to initialize
1404  *
1405  * We allocate one ring per queue at run-time since we don't know the
1406  * number of queues at compile-time.  The polling_netdev array is
1407  * intended for Multiqueue, but should work fine with a single queue.
1408  **/
1409
1410 static int __devinit
1411 e1000_alloc_queues(struct e1000_adapter *adapter)
1412 {
1413         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1414                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1415         if (!adapter->tx_ring)
1416                 return -ENOMEM;
1417
1418         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1419                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1420         if (!adapter->rx_ring) {
1421                 kfree(adapter->tx_ring);
1422                 return -ENOMEM;
1423         }
1424
1425 #ifdef CONFIG_E1000_NAPI
1426         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1427                                           sizeof(struct net_device),
1428                                           GFP_KERNEL);
1429         if (!adapter->polling_netdev) {
1430                 kfree(adapter->tx_ring);
1431                 kfree(adapter->rx_ring);
1432                 return -ENOMEM;
1433         }
1434 #endif
1435
1436         return E1000_SUCCESS;
1437 }
1438
1439 /**
1440  * e1000_open - Called when a network interface is made active
1441  * @netdev: network interface device structure
1442  *
1443  * Returns 0 on success, negative value on failure
1444  *
1445  * The open entry point is called when a network interface is made
1446  * active by the system (IFF_UP).  At this point all resources needed
1447  * for transmit and receive operations are allocated, the interrupt
1448  * handler is registered with the OS, the watchdog timer is started,
1449  * and the stack is notified that the interface is ready.
1450  **/
1451
1452 static int
1453 e1000_open(struct net_device *netdev)
1454 {
1455         struct e1000_adapter *adapter = netdev_priv(netdev);
1456         int err;
1457
1458         /* disallow open during test */
1459         if (test_bit(__E1000_TESTING, &adapter->flags))
1460                 return -EBUSY;
1461
1462         /* allocate transmit descriptors */
1463         err = e1000_setup_all_tx_resources(adapter);
1464         if (err)
1465                 goto err_setup_tx;
1466
1467         /* allocate receive descriptors */
1468         err = e1000_setup_all_rx_resources(adapter);
1469         if (err)
1470                 goto err_setup_rx;
1471
1472         e1000_power_up_phy(adapter);
1473
1474         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1475         if ((adapter->hw.mng_cookie.status &
1476                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1477                 e1000_update_mng_vlan(adapter);
1478         }
1479
1480         /* If AMT is enabled, let the firmware know that the network
1481          * interface is now open */
1482         if (adapter->hw.mac_type == e1000_82573 &&
1483             e1000_check_mng_mode(&adapter->hw))
1484                 e1000_get_hw_control(adapter);
1485
1486         /* before we allocate an interrupt, we must be ready to handle it.
1487          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1488          * as soon as we call pci_request_irq, so we have to setup our
1489          * clean_rx handler before we do so.  */
1490         e1000_configure(adapter);
1491
1492         err = e1000_request_irq(adapter);
1493         if (err)
1494                 goto err_req_irq;
1495
1496         /* From here on the code is the same as e1000_up() */
1497         clear_bit(__E1000_DOWN, &adapter->flags);
1498
1499 #ifdef CONFIG_E1000_NAPI
1500         napi_enable(&adapter->napi);
1501 #endif
1502
1503         e1000_irq_enable(adapter);
1504
1505         /* fire a link status change interrupt to start the watchdog */
1506         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1507
1508         return E1000_SUCCESS;
1509
1510 err_req_irq:
1511         e1000_release_hw_control(adapter);
1512         e1000_power_down_phy(adapter);
1513         e1000_free_all_rx_resources(adapter);
1514 err_setup_rx:
1515         e1000_free_all_tx_resources(adapter);
1516 err_setup_tx:
1517         e1000_reset(adapter);
1518
1519         return err;
1520 }
1521
1522 /**
1523  * e1000_close - Disables a network interface
1524  * @netdev: network interface device structure
1525  *
1526  * Returns 0, this is not allowed to fail
1527  *
1528  * The close entry point is called when an interface is de-activated
1529  * by the OS.  The hardware is still under the drivers control, but
1530  * needs to be disabled.  A global MAC reset is issued to stop the
1531  * hardware, and all transmit and receive resources are freed.
1532  **/
1533
1534 static int
1535 e1000_close(struct net_device *netdev)
1536 {
1537         struct e1000_adapter *adapter = netdev_priv(netdev);
1538
1539         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1540         e1000_down(adapter);
1541         e1000_power_down_phy(adapter);
1542         e1000_free_irq(adapter);
1543
1544         e1000_free_all_tx_resources(adapter);
1545         e1000_free_all_rx_resources(adapter);
1546
1547         /* kill manageability vlan ID if supported, but not if a vlan with
1548          * the same ID is registered on the host OS (let 8021q kill it) */
1549         if ((adapter->hw.mng_cookie.status &
1550                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1551              !(adapter->vlgrp &&
1552                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1553                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1554         }
1555
1556         /* If AMT is enabled, let the firmware know that the network
1557          * interface is now closed */
1558         if (adapter->hw.mac_type == e1000_82573 &&
1559             e1000_check_mng_mode(&adapter->hw))
1560                 e1000_release_hw_control(adapter);
1561
1562         return 0;
1563 }
1564
1565 /**
1566  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1567  * @adapter: address of board private structure
1568  * @start: address of beginning of memory
1569  * @len: length of memory
1570  **/
1571 static boolean_t
1572 e1000_check_64k_bound(struct e1000_adapter *adapter,
1573                       void *start, unsigned long len)
1574 {
1575         unsigned long begin = (unsigned long) start;
1576         unsigned long end = begin + len;
1577
1578         /* First rev 82545 and 82546 need to not allow any memory
1579          * write location to cross 64k boundary due to errata 23 */
1580         if (adapter->hw.mac_type == e1000_82545 ||
1581             adapter->hw.mac_type == e1000_82546) {
1582                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1583         }
1584
1585         return TRUE;
1586 }
1587
1588 /**
1589  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1590  * @adapter: board private structure
1591  * @txdr:    tx descriptor ring (for a specific queue) to setup
1592  *
1593  * Return 0 on success, negative on failure
1594  **/
1595
1596 static int
1597 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1598                          struct e1000_tx_ring *txdr)
1599 {
1600         struct pci_dev *pdev = adapter->pdev;
1601         int size;
1602
1603         size = sizeof(struct e1000_buffer) * txdr->count;
1604         txdr->buffer_info = vmalloc(size);
1605         if (!txdr->buffer_info) {
1606                 DPRINTK(PROBE, ERR,
1607                 "Unable to allocate memory for the transmit descriptor ring\n");
1608                 return -ENOMEM;
1609         }
1610         memset(txdr->buffer_info, 0, size);
1611
1612         /* round up to nearest 4K */
1613
1614         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1615         txdr->size = ALIGN(txdr->size, 4096);
1616
1617         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1618         if (!txdr->desc) {
1619 setup_tx_desc_die:
1620                 vfree(txdr->buffer_info);
1621                 DPRINTK(PROBE, ERR,
1622                 "Unable to allocate memory for the transmit descriptor ring\n");
1623                 return -ENOMEM;
1624         }
1625
1626         /* Fix for errata 23, can't cross 64kB boundary */
1627         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1628                 void *olddesc = txdr->desc;
1629                 dma_addr_t olddma = txdr->dma;
1630                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1631                                      "at %p\n", txdr->size, txdr->desc);
1632                 /* Try again, without freeing the previous */
1633                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1634                 /* Failed allocation, critical failure */
1635                 if (!txdr->desc) {
1636                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1637                         goto setup_tx_desc_die;
1638                 }
1639
1640                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1641                         /* give up */
1642                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1643                                             txdr->dma);
1644                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1645                         DPRINTK(PROBE, ERR,
1646                                 "Unable to allocate aligned memory "
1647                                 "for the transmit descriptor ring\n");
1648                         vfree(txdr->buffer_info);
1649                         return -ENOMEM;
1650                 } else {
1651                         /* Free old allocation, new allocation was successful */
1652                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1653                 }
1654         }
1655         memset(txdr->desc, 0, txdr->size);
1656
1657         txdr->next_to_use = 0;
1658         txdr->next_to_clean = 0;
1659         spin_lock_init(&txdr->tx_lock);
1660
1661         return 0;
1662 }
1663
1664 /**
1665  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1666  *                                (Descriptors) for all queues
1667  * @adapter: board private structure
1668  *
1669  * Return 0 on success, negative on failure
1670  **/
1671
1672 int
1673 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1674 {
1675         int i, err = 0;
1676
1677         for (i = 0; i < adapter->num_tx_queues; i++) {
1678                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1679                 if (err) {
1680                         DPRINTK(PROBE, ERR,
1681                                 "Allocation for Tx Queue %u failed\n", i);
1682                         for (i-- ; i >= 0; i--)
1683                                 e1000_free_tx_resources(adapter,
1684                                                         &adapter->tx_ring[i]);
1685                         break;
1686                 }
1687         }
1688
1689         return err;
1690 }
1691
1692 /**
1693  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1694  * @adapter: board private structure
1695  *
1696  * Configure the Tx unit of the MAC after a reset.
1697  **/
1698
1699 static void
1700 e1000_configure_tx(struct e1000_adapter *adapter)
1701 {
1702         uint64_t tdba;
1703         struct e1000_hw *hw = &adapter->hw;
1704         uint32_t tdlen, tctl, tipg, tarc;
1705         uint32_t ipgr1, ipgr2;
1706
1707         /* Setup the HW Tx Head and Tail descriptor pointers */
1708
1709         switch (adapter->num_tx_queues) {
1710         case 1:
1711         default:
1712                 tdba = adapter->tx_ring[0].dma;
1713                 tdlen = adapter->tx_ring[0].count *
1714                         sizeof(struct e1000_tx_desc);
1715                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1716                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1717                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1718                 E1000_WRITE_REG(hw, TDT, 0);
1719                 E1000_WRITE_REG(hw, TDH, 0);
1720                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1721                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1722                 break;
1723         }
1724
1725         /* Set the default values for the Tx Inter Packet Gap timer */
1726         if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1727             (hw->media_type == e1000_media_type_fiber ||
1728              hw->media_type == e1000_media_type_internal_serdes))
1729                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1730         else
1731                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1732
1733         switch (hw->mac_type) {
1734         case e1000_82542_rev2_0:
1735         case e1000_82542_rev2_1:
1736                 tipg = DEFAULT_82542_TIPG_IPGT;
1737                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1738                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1739                 break;
1740         case e1000_80003es2lan:
1741                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1742                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1743                 break;
1744         default:
1745                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1746                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1747                 break;
1748         }
1749         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1750         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1751         E1000_WRITE_REG(hw, TIPG, tipg);
1752
1753         /* Set the Tx Interrupt Delay register */
1754
1755         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1756         if (hw->mac_type >= e1000_82540)
1757                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1758
1759         /* Program the Transmit Control Register */
1760
1761         tctl = E1000_READ_REG(hw, TCTL);
1762         tctl &= ~E1000_TCTL_CT;
1763         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1764                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1765
1766         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1767                 tarc = E1000_READ_REG(hw, TARC0);
1768                 /* set the speed mode bit, we'll clear it if we're not at
1769                  * gigabit link later */
1770                 tarc |= (1 << 21);
1771                 E1000_WRITE_REG(hw, TARC0, tarc);
1772         } else if (hw->mac_type == e1000_80003es2lan) {
1773                 tarc = E1000_READ_REG(hw, TARC0);
1774                 tarc |= 1;
1775                 E1000_WRITE_REG(hw, TARC0, tarc);
1776                 tarc = E1000_READ_REG(hw, TARC1);
1777                 tarc |= 1;
1778                 E1000_WRITE_REG(hw, TARC1, tarc);
1779         }
1780
1781         e1000_config_collision_dist(hw);
1782
1783         /* Setup Transmit Descriptor Settings for eop descriptor */
1784         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1785
1786         /* only set IDE if we are delaying interrupts using the timers */
1787         if (adapter->tx_int_delay)
1788                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1789
1790         if (hw->mac_type < e1000_82543)
1791                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1792         else
1793                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1794
1795         /* Cache if we're 82544 running in PCI-X because we'll
1796          * need this to apply a workaround later in the send path. */
1797         if (hw->mac_type == e1000_82544 &&
1798             hw->bus_type == e1000_bus_type_pcix)
1799                 adapter->pcix_82544 = 1;
1800
1801         E1000_WRITE_REG(hw, TCTL, tctl);
1802
1803 }
1804
1805 /**
1806  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1807  * @adapter: board private structure
1808  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1809  *
1810  * Returns 0 on success, negative on failure
1811  **/
1812
1813 static int
1814 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1815                          struct e1000_rx_ring *rxdr)
1816 {
1817         struct pci_dev *pdev = adapter->pdev;
1818         int size, desc_len;
1819
1820         size = sizeof(struct e1000_buffer) * rxdr->count;
1821         rxdr->buffer_info = vmalloc(size);
1822         if (!rxdr->buffer_info) {
1823                 DPRINTK(PROBE, ERR,
1824                 "Unable to allocate memory for the receive descriptor ring\n");
1825                 return -ENOMEM;
1826         }
1827         memset(rxdr->buffer_info, 0, size);
1828
1829         rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1830                                 GFP_KERNEL);
1831         if (!rxdr->ps_page) {
1832                 vfree(rxdr->buffer_info);
1833                 DPRINTK(PROBE, ERR,
1834                 "Unable to allocate memory for the receive descriptor ring\n");
1835                 return -ENOMEM;
1836         }
1837
1838         rxdr->ps_page_dma = kcalloc(rxdr->count,
1839                                     sizeof(struct e1000_ps_page_dma),
1840                                     GFP_KERNEL);
1841         if (!rxdr->ps_page_dma) {
1842                 vfree(rxdr->buffer_info);
1843                 kfree(rxdr->ps_page);
1844                 DPRINTK(PROBE, ERR,
1845                 "Unable to allocate memory for the receive descriptor ring\n");
1846                 return -ENOMEM;
1847         }
1848
1849         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1850                 desc_len = sizeof(struct e1000_rx_desc);
1851         else
1852                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1853
1854         /* Round up to nearest 4K */
1855
1856         rxdr->size = rxdr->count * desc_len;
1857         rxdr->size = ALIGN(rxdr->size, 4096);
1858
1859         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1860
1861         if (!rxdr->desc) {
1862                 DPRINTK(PROBE, ERR,
1863                 "Unable to allocate memory for the receive descriptor ring\n");
1864 setup_rx_desc_die:
1865                 vfree(rxdr->buffer_info);
1866                 kfree(rxdr->ps_page);
1867                 kfree(rxdr->ps_page_dma);
1868                 return -ENOMEM;
1869         }
1870
1871         /* Fix for errata 23, can't cross 64kB boundary */
1872         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1873                 void *olddesc = rxdr->desc;
1874                 dma_addr_t olddma = rxdr->dma;
1875                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1876                                      "at %p\n", rxdr->size, rxdr->desc);
1877                 /* Try again, without freeing the previous */
1878                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1879                 /* Failed allocation, critical failure */
1880                 if (!rxdr->desc) {
1881                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1882                         DPRINTK(PROBE, ERR,
1883                                 "Unable to allocate memory "
1884                                 "for the receive descriptor ring\n");
1885                         goto setup_rx_desc_die;
1886                 }
1887
1888                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1889                         /* give up */
1890                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1891                                             rxdr->dma);
1892                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1893                         DPRINTK(PROBE, ERR,
1894                                 "Unable to allocate aligned memory "
1895                                 "for the receive descriptor ring\n");
1896                         goto setup_rx_desc_die;
1897                 } else {
1898                         /* Free old allocation, new allocation was successful */
1899                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1900                 }
1901         }
1902         memset(rxdr->desc, 0, rxdr->size);
1903
1904         rxdr->next_to_clean = 0;
1905         rxdr->next_to_use = 0;
1906
1907         return 0;
1908 }
1909
1910 /**
1911  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1912  *                                (Descriptors) for all queues
1913  * @adapter: board private structure
1914  *
1915  * Return 0 on success, negative on failure
1916  **/
1917
1918 int
1919 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1920 {
1921         int i, err = 0;
1922
1923         for (i = 0; i < adapter->num_rx_queues; i++) {
1924                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1925                 if (err) {
1926                         DPRINTK(PROBE, ERR,
1927                                 "Allocation for Rx Queue %u failed\n", i);
1928                         for (i-- ; i >= 0; i--)
1929                                 e1000_free_rx_resources(adapter,
1930                                                         &adapter->rx_ring[i]);
1931                         break;
1932                 }
1933         }
1934
1935         return err;
1936 }
1937
1938 /**
1939  * e1000_setup_rctl - configure the receive control registers
1940  * @adapter: Board private structure
1941  **/
1942 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1943                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1944 static void
1945 e1000_setup_rctl(struct e1000_adapter *adapter)
1946 {
1947         uint32_t rctl, rfctl;
1948         uint32_t psrctl = 0;
1949 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1950         uint32_t pages = 0;
1951 #endif
1952
1953         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1954
1955         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1956
1957         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1958                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1959                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1960
1961         if (adapter->hw.tbi_compatibility_on == 1)
1962                 rctl |= E1000_RCTL_SBP;
1963         else
1964                 rctl &= ~E1000_RCTL_SBP;
1965
1966         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1967                 rctl &= ~E1000_RCTL_LPE;
1968         else
1969                 rctl |= E1000_RCTL_LPE;
1970
1971         /* Setup buffer sizes */
1972         rctl &= ~E1000_RCTL_SZ_4096;
1973         rctl |= E1000_RCTL_BSEX;
1974         switch (adapter->rx_buffer_len) {
1975                 case E1000_RXBUFFER_256:
1976                         rctl |= E1000_RCTL_SZ_256;
1977                         rctl &= ~E1000_RCTL_BSEX;
1978                         break;
1979                 case E1000_RXBUFFER_512:
1980                         rctl |= E1000_RCTL_SZ_512;
1981                         rctl &= ~E1000_RCTL_BSEX;
1982                         break;
1983                 case E1000_RXBUFFER_1024:
1984                         rctl |= E1000_RCTL_SZ_1024;
1985                         rctl &= ~E1000_RCTL_BSEX;
1986                         break;
1987                 case E1000_RXBUFFER_2048:
1988                 default:
1989                         rctl |= E1000_RCTL_SZ_2048;
1990                         rctl &= ~E1000_RCTL_BSEX;
1991                         break;
1992                 case E1000_RXBUFFER_4096:
1993                         rctl |= E1000_RCTL_SZ_4096;
1994                         break;
1995                 case E1000_RXBUFFER_8192:
1996                         rctl |= E1000_RCTL_SZ_8192;
1997                         break;
1998                 case E1000_RXBUFFER_16384:
1999                         rctl |= E1000_RCTL_SZ_16384;
2000                         break;
2001         }
2002
2003 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
2004         /* 82571 and greater support packet-split where the protocol
2005          * header is placed in skb->data and the packet data is
2006          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2007          * In the case of a non-split, skb->data is linearly filled,
2008          * followed by the page buffers.  Therefore, skb->data is
2009          * sized to hold the largest protocol header.
2010          */
2011         /* allocations using alloc_page take too long for regular MTU
2012          * so only enable packet split for jumbo frames */
2013         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2014         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
2015             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
2016                 adapter->rx_ps_pages = pages;
2017         else
2018                 adapter->rx_ps_pages = 0;
2019 #endif
2020         if (adapter->rx_ps_pages) {
2021                 /* Configure extra packet-split registers */
2022                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
2023                 rfctl |= E1000_RFCTL_EXTEN;
2024                 /* disable packet split support for IPv6 extension headers,
2025                  * because some malformed IPv6 headers can hang the RX */
2026                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2027                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2028
2029                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
2030
2031                 rctl |= E1000_RCTL_DTYP_PS;
2032
2033                 psrctl |= adapter->rx_ps_bsize0 >>
2034                         E1000_PSRCTL_BSIZE0_SHIFT;
2035
2036                 switch (adapter->rx_ps_pages) {
2037                 case 3:
2038                         psrctl |= PAGE_SIZE <<
2039                                 E1000_PSRCTL_BSIZE3_SHIFT;
2040                 case 2:
2041                         psrctl |= PAGE_SIZE <<
2042                                 E1000_PSRCTL_BSIZE2_SHIFT;
2043                 case 1:
2044                         psrctl |= PAGE_SIZE >>
2045                                 E1000_PSRCTL_BSIZE1_SHIFT;
2046                         break;
2047                 }
2048
2049                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
2050         }
2051
2052         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2053 }
2054
2055 /**
2056  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2057  * @adapter: board private structure
2058  *
2059  * Configure the Rx unit of the MAC after a reset.
2060  **/
2061
2062 static void
2063 e1000_configure_rx(struct e1000_adapter *adapter)
2064 {
2065         uint64_t rdba;
2066         struct e1000_hw *hw = &adapter->hw;
2067         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2068
2069         if (adapter->rx_ps_pages) {
2070                 /* this is a 32 byte descriptor */
2071                 rdlen = adapter->rx_ring[0].count *
2072                         sizeof(union e1000_rx_desc_packet_split);
2073                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2074                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2075         } else {
2076                 rdlen = adapter->rx_ring[0].count *
2077                         sizeof(struct e1000_rx_desc);
2078                 adapter->clean_rx = e1000_clean_rx_irq;
2079                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2080         }
2081
2082         /* disable receives while setting up the descriptors */
2083         rctl = E1000_READ_REG(hw, RCTL);
2084         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2085
2086         /* set the Receive Delay Timer Register */
2087         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2088
2089         if (hw->mac_type >= e1000_82540) {
2090                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2091                 if (adapter->itr_setting != 0)
2092                         E1000_WRITE_REG(hw, ITR,
2093                                 1000000000 / (adapter->itr * 256));
2094         }
2095
2096         if (hw->mac_type >= e1000_82571) {
2097                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2098                 /* Reset delay timers after every interrupt */
2099                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2100 #ifdef CONFIG_E1000_NAPI
2101                 /* Auto-Mask interrupts upon ICR access */
2102                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2103                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2104 #endif
2105                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2106                 E1000_WRITE_FLUSH(hw);
2107         }
2108
2109         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2110          * the Base and Length of the Rx Descriptor Ring */
2111         switch (adapter->num_rx_queues) {
2112         case 1:
2113         default:
2114                 rdba = adapter->rx_ring[0].dma;
2115                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2116                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2117                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2118                 E1000_WRITE_REG(hw, RDT, 0);
2119                 E1000_WRITE_REG(hw, RDH, 0);
2120                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2121                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2122                 break;
2123         }
2124
2125         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2126         if (hw->mac_type >= e1000_82543) {
2127                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2128                 if (adapter->rx_csum == TRUE) {
2129                         rxcsum |= E1000_RXCSUM_TUOFL;
2130
2131                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2132                          * Must be used in conjunction with packet-split. */
2133                         if ((hw->mac_type >= e1000_82571) &&
2134                             (adapter->rx_ps_pages)) {
2135                                 rxcsum |= E1000_RXCSUM_IPPCSE;
2136                         }
2137                 } else {
2138                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2139                         /* don't need to clear IPPCSE as it defaults to 0 */
2140                 }
2141                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2142         }
2143
2144         /* enable early receives on 82573, only takes effect if using > 2048
2145          * byte total frame size.  for example only for jumbo frames */
2146 #define E1000_ERT_2048 0x100
2147         if (hw->mac_type == e1000_82573)
2148                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2149
2150         /* Enable Receives */
2151         E1000_WRITE_REG(hw, RCTL, rctl);
2152 }
2153
2154 /**
2155  * e1000_free_tx_resources - Free Tx Resources per Queue
2156  * @adapter: board private structure
2157  * @tx_ring: Tx descriptor ring for a specific queue
2158  *
2159  * Free all transmit software resources
2160  **/
2161
2162 static void
2163 e1000_free_tx_resources(struct e1000_adapter *adapter,
2164                         struct e1000_tx_ring *tx_ring)
2165 {
2166         struct pci_dev *pdev = adapter->pdev;
2167
2168         e1000_clean_tx_ring(adapter, tx_ring);
2169
2170         vfree(tx_ring->buffer_info);
2171         tx_ring->buffer_info = NULL;
2172
2173         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2174
2175         tx_ring->desc = NULL;
2176 }
2177
2178 /**
2179  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2180  * @adapter: board private structure
2181  *
2182  * Free all transmit software resources
2183  **/
2184
2185 void
2186 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2187 {
2188         int i;
2189
2190         for (i = 0; i < adapter->num_tx_queues; i++)
2191                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2192 }
2193
2194 static void
2195 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2196                         struct e1000_buffer *buffer_info)
2197 {
2198         if (buffer_info->dma) {
2199                 pci_unmap_page(adapter->pdev,
2200                                 buffer_info->dma,
2201                                 buffer_info->length,
2202                                 PCI_DMA_TODEVICE);
2203                 buffer_info->dma = 0;
2204         }
2205         if (buffer_info->skb) {
2206                 dev_kfree_skb_any(buffer_info->skb);
2207                 buffer_info->skb = NULL;
2208         }
2209         /* buffer_info must be completely set up in the transmit path */
2210 }
2211
2212 /**
2213  * e1000_clean_tx_ring - Free Tx Buffers
2214  * @adapter: board private structure
2215  * @tx_ring: ring to be cleaned
2216  **/
2217
2218 static void
2219 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2220                     struct e1000_tx_ring *tx_ring)
2221 {
2222         struct e1000_buffer *buffer_info;
2223         unsigned long size;
2224         unsigned int i;
2225
2226         /* Free all the Tx ring sk_buffs */
2227
2228         for (i = 0; i < tx_ring->count; i++) {
2229                 buffer_info = &tx_ring->buffer_info[i];
2230                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2231         }
2232
2233         size = sizeof(struct e1000_buffer) * tx_ring->count;
2234         memset(tx_ring->buffer_info, 0, size);
2235
2236         /* Zero out the descriptor ring */
2237
2238         memset(tx_ring->desc, 0, tx_ring->size);
2239
2240         tx_ring->next_to_use = 0;
2241         tx_ring->next_to_clean = 0;
2242         tx_ring->last_tx_tso = 0;
2243
2244         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2245         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2246 }
2247
2248 /**
2249  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2250  * @adapter: board private structure
2251  **/
2252
2253 static void
2254 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2255 {
2256         int i;
2257
2258         for (i = 0; i < adapter->num_tx_queues; i++)
2259                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2260 }
2261
2262 /**
2263  * e1000_free_rx_resources - Free Rx Resources
2264  * @adapter: board private structure
2265  * @rx_ring: ring to clean the resources from
2266  *
2267  * Free all receive software resources
2268  **/
2269
2270 static void
2271 e1000_free_rx_resources(struct e1000_adapter *adapter,
2272                         struct e1000_rx_ring *rx_ring)
2273 {
2274         struct pci_dev *pdev = adapter->pdev;
2275
2276         e1000_clean_rx_ring(adapter, rx_ring);
2277
2278         vfree(rx_ring->buffer_info);
2279         rx_ring->buffer_info = NULL;
2280         kfree(rx_ring->ps_page);
2281         rx_ring->ps_page = NULL;
2282         kfree(rx_ring->ps_page_dma);
2283         rx_ring->ps_page_dma = NULL;
2284
2285         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2286
2287         rx_ring->desc = NULL;
2288 }
2289
2290 /**
2291  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2292  * @adapter: board private structure
2293  *
2294  * Free all receive software resources
2295  **/
2296
2297 void
2298 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2299 {
2300         int i;
2301
2302         for (i = 0; i < adapter->num_rx_queues; i++)
2303                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2304 }
2305
2306 /**
2307  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2308  * @adapter: board private structure
2309  * @rx_ring: ring to free buffers from
2310  **/
2311
2312 static void
2313 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2314                     struct e1000_rx_ring *rx_ring)
2315 {
2316         struct e1000_buffer *buffer_info;
2317         struct e1000_ps_page *ps_page;
2318         struct e1000_ps_page_dma *ps_page_dma;
2319         struct pci_dev *pdev = adapter->pdev;
2320         unsigned long size;
2321         unsigned int i, j;
2322
2323         /* Free all the Rx ring sk_buffs */
2324         for (i = 0; i < rx_ring->count; i++) {
2325                 buffer_info = &rx_ring->buffer_info[i];
2326                 if (buffer_info->skb) {
2327                         pci_unmap_single(pdev,
2328                                          buffer_info->dma,
2329                                          buffer_info->length,
2330                                          PCI_DMA_FROMDEVICE);
2331
2332                         dev_kfree_skb(buffer_info->skb);
2333                         buffer_info->skb = NULL;
2334                 }
2335                 ps_page = &rx_ring->ps_page[i];
2336                 ps_page_dma = &rx_ring->ps_page_dma[i];
2337                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2338                         if (!ps_page->ps_page[j]) break;
2339                         pci_unmap_page(pdev,
2340                                        ps_page_dma->ps_page_dma[j],
2341                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2342                         ps_page_dma->ps_page_dma[j] = 0;
2343                         put_page(ps_page->ps_page[j]);
2344                         ps_page->ps_page[j] = NULL;
2345                 }
2346         }
2347
2348         size = sizeof(struct e1000_buffer) * rx_ring->count;
2349         memset(rx_ring->buffer_info, 0, size);
2350         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2351         memset(rx_ring->ps_page, 0, size);
2352         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2353         memset(rx_ring->ps_page_dma, 0, size);
2354
2355         /* Zero out the descriptor ring */
2356
2357         memset(rx_ring->desc, 0, rx_ring->size);
2358
2359         rx_ring->next_to_clean = 0;
2360         rx_ring->next_to_use = 0;
2361
2362         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2363         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2364 }
2365
2366 /**
2367  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2368  * @adapter: board private structure
2369  **/
2370
2371 static void
2372 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2373 {
2374         int i;
2375
2376         for (i = 0; i < adapter->num_rx_queues; i++)
2377                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2378 }
2379
2380 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2381  * and memory write and invalidate disabled for certain operations
2382  */
2383 static void
2384 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2385 {
2386         struct net_device *netdev = adapter->netdev;
2387         uint32_t rctl;
2388
2389         e1000_pci_clear_mwi(&adapter->hw);
2390
2391         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2392         rctl |= E1000_RCTL_RST;
2393         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2394         E1000_WRITE_FLUSH(&adapter->hw);
2395         mdelay(5);
2396
2397         if (netif_running(netdev))
2398                 e1000_clean_all_rx_rings(adapter);
2399 }
2400
2401 static void
2402 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2403 {
2404         struct net_device *netdev = adapter->netdev;
2405         uint32_t rctl;
2406
2407         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2408         rctl &= ~E1000_RCTL_RST;
2409         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2410         E1000_WRITE_FLUSH(&adapter->hw);
2411         mdelay(5);
2412
2413         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2414                 e1000_pci_set_mwi(&adapter->hw);
2415
2416         if (netif_running(netdev)) {
2417                 /* No need to loop, because 82542 supports only 1 queue */
2418                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2419                 e1000_configure_rx(adapter);
2420                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2421         }
2422 }
2423
2424 /**
2425  * e1000_set_mac - Change the Ethernet Address of the NIC
2426  * @netdev: network interface device structure
2427  * @p: pointer to an address structure
2428  *
2429  * Returns 0 on success, negative on failure
2430  **/
2431
2432 static int
2433 e1000_set_mac(struct net_device *netdev, void *p)
2434 {
2435         struct e1000_adapter *adapter = netdev_priv(netdev);
2436         struct sockaddr *addr = p;
2437
2438         if (!is_valid_ether_addr(addr->sa_data))
2439                 return -EADDRNOTAVAIL;
2440
2441         /* 82542 2.0 needs to be in reset to write receive address registers */
2442
2443         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2444                 e1000_enter_82542_rst(adapter);
2445
2446         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2447         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2448
2449         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2450
2451         /* With 82571 controllers, LAA may be overwritten (with the default)
2452          * due to controller reset from the other port. */
2453         if (adapter->hw.mac_type == e1000_82571) {
2454                 /* activate the work around */
2455                 adapter->hw.laa_is_present = 1;
2456
2457                 /* Hold a copy of the LAA in RAR[14] This is done so that
2458                  * between the time RAR[0] gets clobbered  and the time it
2459                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2460                  * of the RARs and no incoming packets directed to this port
2461                  * are dropped. Eventaully the LAA will be in RAR[0] and
2462                  * RAR[14] */
2463                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2464                                         E1000_RAR_ENTRIES - 1);
2465         }
2466
2467         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2468                 e1000_leave_82542_rst(adapter);
2469
2470         return 0;
2471 }
2472
2473 /**
2474  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2475  * @netdev: network interface device structure
2476  *
2477  * The set_rx_mode entry point is called whenever the unicast or multicast
2478  * address lists or the network interface flags are updated. This routine is
2479  * responsible for configuring the hardware for proper unicast, multicast,
2480  * promiscuous mode, and all-multi behavior.
2481  **/
2482
2483 static void
2484 e1000_set_rx_mode(struct net_device *netdev)
2485 {
2486         struct e1000_adapter *adapter = netdev_priv(netdev);
2487         struct e1000_hw *hw = &adapter->hw;
2488         struct dev_addr_list *uc_ptr;
2489         struct dev_addr_list *mc_ptr;
2490         uint32_t rctl;
2491         uint32_t hash_value;
2492         int i, rar_entries = E1000_RAR_ENTRIES;
2493         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2494                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2495                                 E1000_NUM_MTA_REGISTERS;
2496
2497         if (adapter->hw.mac_type == e1000_ich8lan)
2498                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2499
2500         /* reserve RAR[14] for LAA over-write work-around */
2501         if (adapter->hw.mac_type == e1000_82571)
2502                 rar_entries--;
2503
2504         /* Check for Promiscuous and All Multicast modes */
2505
2506         rctl = E1000_READ_REG(hw, RCTL);
2507
2508         if (netdev->flags & IFF_PROMISC) {
2509                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2510         } else if (netdev->flags & IFF_ALLMULTI) {
2511                 rctl |= E1000_RCTL_MPE;
2512         } else {
2513                 rctl &= ~E1000_RCTL_MPE;
2514         }
2515
2516         uc_ptr = NULL;
2517         if (netdev->uc_count > rar_entries - 1) {
2518                 rctl |= E1000_RCTL_UPE;
2519         } else if (!(netdev->flags & IFF_PROMISC)) {
2520                 rctl &= ~E1000_RCTL_UPE;
2521                 uc_ptr = netdev->uc_list;
2522         }
2523
2524         E1000_WRITE_REG(hw, RCTL, rctl);
2525
2526         /* 82542 2.0 needs to be in reset to write receive address registers */
2527
2528         if (hw->mac_type == e1000_82542_rev2_0)
2529                 e1000_enter_82542_rst(adapter);
2530
2531         /* load the first 14 addresses into the exact filters 1-14. Unicast
2532          * addresses take precedence to avoid disabling unicast filtering
2533          * when possible.
2534          *
2535          * RAR 0 is used for the station MAC adddress
2536          * if there are not 14 addresses, go ahead and clear the filters
2537          * -- with 82571 controllers only 0-13 entries are filled here
2538          */
2539         mc_ptr = netdev->mc_list;
2540
2541         for (i = 1; i < rar_entries; i++) {
2542                 if (uc_ptr) {
2543                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2544                         uc_ptr = uc_ptr->next;
2545                 } else if (mc_ptr) {
2546                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2547                         mc_ptr = mc_ptr->next;
2548                 } else {
2549                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2550                         E1000_WRITE_FLUSH(hw);
2551                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2552                         E1000_WRITE_FLUSH(hw);
2553                 }
2554         }
2555         WARN_ON(uc_ptr != NULL);
2556
2557         /* clear the old settings from the multicast hash table */
2558
2559         for (i = 0; i < mta_reg_count; i++) {
2560                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2561                 E1000_WRITE_FLUSH(hw);
2562         }
2563
2564         /* load any remaining addresses into the hash table */
2565
2566         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2567                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2568                 e1000_mta_set(hw, hash_value);
2569         }
2570
2571         if (hw->mac_type == e1000_82542_rev2_0)
2572                 e1000_leave_82542_rst(adapter);
2573 }
2574
2575 /* Need to wait a few seconds after link up to get diagnostic information from
2576  * the phy */
2577
2578 static void
2579 e1000_update_phy_info(unsigned long data)
2580 {
2581         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2582         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2583 }
2584
2585 /**
2586  * e1000_82547_tx_fifo_stall - Timer Call-back
2587  * @data: pointer to adapter cast into an unsigned long
2588  **/
2589
2590 static void
2591 e1000_82547_tx_fifo_stall(unsigned long data)
2592 {
2593         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2594         struct net_device *netdev = adapter->netdev;
2595         uint32_t tctl;
2596
2597         if (atomic_read(&adapter->tx_fifo_stall)) {
2598                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2599                     E1000_READ_REG(&adapter->hw, TDH)) &&
2600                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2601                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2602                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2603                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2604                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2605                         E1000_WRITE_REG(&adapter->hw, TCTL,
2606                                         tctl & ~E1000_TCTL_EN);
2607                         E1000_WRITE_REG(&adapter->hw, TDFT,
2608                                         adapter->tx_head_addr);
2609                         E1000_WRITE_REG(&adapter->hw, TDFH,
2610                                         adapter->tx_head_addr);
2611                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2612                                         adapter->tx_head_addr);
2613                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2614                                         adapter->tx_head_addr);
2615                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2616                         E1000_WRITE_FLUSH(&adapter->hw);
2617
2618                         adapter->tx_fifo_head = 0;
2619                         atomic_set(&adapter->tx_fifo_stall, 0);
2620                         netif_wake_queue(netdev);
2621                 } else {
2622                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2623                 }
2624         }
2625 }
2626
2627 /**
2628  * e1000_watchdog - Timer Call-back
2629  * @data: pointer to adapter cast into an unsigned long
2630  **/
2631 static void
2632 e1000_watchdog(unsigned long data)
2633 {
2634         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2635         struct net_device *netdev = adapter->netdev;
2636         struct e1000_tx_ring *txdr = adapter->tx_ring;
2637         uint32_t link, tctl;
2638         int32_t ret_val;
2639
2640         ret_val = e1000_check_for_link(&adapter->hw);
2641         if ((ret_val == E1000_ERR_PHY) &&
2642             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2643             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2644                 /* See e1000_kumeran_lock_loss_workaround() */
2645                 DPRINTK(LINK, INFO,
2646                         "Gigabit has been disabled, downgrading speed\n");
2647         }
2648
2649         if (adapter->hw.mac_type == e1000_82573) {
2650                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2651                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2652                         e1000_update_mng_vlan(adapter);
2653         }
2654
2655         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2656            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2657                 link = !adapter->hw.serdes_link_down;
2658         else
2659                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2660
2661         if (link) {
2662                 if (!netif_carrier_ok(netdev)) {
2663                         uint32_t ctrl;
2664                         boolean_t txb2b = 1;
2665                         e1000_get_speed_and_duplex(&adapter->hw,
2666                                                    &adapter->link_speed,
2667                                                    &adapter->link_duplex);
2668
2669                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2670                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2671                                 "Flow Control: %s\n",
2672                                 adapter->link_speed,
2673                                 adapter->link_duplex == FULL_DUPLEX ?
2674                                 "Full Duplex" : "Half Duplex",
2675                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2676                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2677                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2678                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2679
2680                         /* tweak tx_queue_len according to speed/duplex
2681                          * and adjust the timeout factor */
2682                         netdev->tx_queue_len = adapter->tx_queue_len;
2683                         adapter->tx_timeout_factor = 1;
2684                         switch (adapter->link_speed) {
2685                         case SPEED_10:
2686                                 txb2b = 0;
2687                                 netdev->tx_queue_len = 10;
2688                                 adapter->tx_timeout_factor = 8;
2689                                 break;
2690                         case SPEED_100:
2691                                 txb2b = 0;
2692                                 netdev->tx_queue_len = 100;
2693                                 /* maybe add some timeout factor ? */
2694                                 break;
2695                         }
2696
2697                         if ((adapter->hw.mac_type == e1000_82571 ||
2698                              adapter->hw.mac_type == e1000_82572) &&
2699                             txb2b == 0) {
2700                                 uint32_t tarc0;
2701                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2702                                 tarc0 &= ~(1 << 21);
2703                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2704                         }
2705
2706                         /* disable TSO for pcie and 10/100 speeds, to avoid
2707                          * some hardware issues */
2708                         if (!adapter->tso_force &&
2709                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2710                                 switch (adapter->link_speed) {
2711                                 case SPEED_10:
2712                                 case SPEED_100:
2713                                         DPRINTK(PROBE,INFO,
2714                                         "10/100 speed: disabling TSO\n");
2715                                         netdev->features &= ~NETIF_F_TSO;
2716                                         netdev->features &= ~NETIF_F_TSO6;
2717                                         break;
2718                                 case SPEED_1000:
2719                                         netdev->features |= NETIF_F_TSO;
2720                                         netdev->features |= NETIF_F_TSO6;
2721                                         break;
2722                                 default:
2723                                         /* oops */
2724                                         break;
2725                                 }
2726                         }
2727
2728                         /* enable transmits in the hardware, need to do this
2729                          * after setting TARC0 */
2730                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2731                         tctl |= E1000_TCTL_EN;
2732                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2733
2734                         netif_carrier_on(netdev);
2735                         netif_wake_queue(netdev);
2736                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2737                         adapter->smartspeed = 0;
2738                 } else {
2739                         /* make sure the receive unit is started */
2740                         if (adapter->hw.rx_needs_kicking) {
2741                                 struct e1000_hw *hw = &adapter->hw;
2742                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2743                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2744                         }
2745                 }
2746         } else {
2747                 if (netif_carrier_ok(netdev)) {
2748                         adapter->link_speed = 0;
2749                         adapter->link_duplex = 0;
2750                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2751                         netif_carrier_off(netdev);
2752                         netif_stop_queue(netdev);
2753                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2754
2755                         /* 80003ES2LAN workaround--
2756                          * For packet buffer work-around on link down event;
2757                          * disable receives in the ISR and
2758                          * reset device here in the watchdog
2759                          */
2760                         if (adapter->hw.mac_type == e1000_80003es2lan)
2761                                 /* reset device */
2762                                 schedule_work(&adapter->reset_task);
2763                 }
2764
2765                 e1000_smartspeed(adapter);
2766         }
2767
2768         e1000_update_stats(adapter);
2769
2770         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2771         adapter->tpt_old = adapter->stats.tpt;
2772         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2773         adapter->colc_old = adapter->stats.colc;
2774
2775         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2776         adapter->gorcl_old = adapter->stats.gorcl;
2777         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2778         adapter->gotcl_old = adapter->stats.gotcl;
2779
2780         e1000_update_adaptive(&adapter->hw);
2781
2782         if (!netif_carrier_ok(netdev)) {
2783                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2784                         /* We've lost link, so the controller stops DMA,
2785                          * but we've got queued Tx work that's never going
2786                          * to get done, so reset controller to flush Tx.
2787                          * (Do the reset outside of interrupt context). */
2788                         adapter->tx_timeout_count++;
2789                         schedule_work(&adapter->reset_task);
2790                 }
2791         }
2792
2793         /* Cause software interrupt to ensure rx ring is cleaned */
2794         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2795
2796         /* Force detection of hung controller every watchdog period */
2797         adapter->detect_tx_hung = TRUE;
2798
2799         /* With 82571 controllers, LAA may be overwritten due to controller
2800          * reset from the other port. Set the appropriate LAA in RAR[0] */
2801         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2802                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2803
2804         /* Reset the timer */
2805         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2806 }
2807
2808 enum latency_range {
2809         lowest_latency = 0,
2810         low_latency = 1,
2811         bulk_latency = 2,
2812         latency_invalid = 255
2813 };
2814
2815 /**
2816  * e1000_update_itr - update the dynamic ITR value based on statistics
2817  *      Stores a new ITR value based on packets and byte
2818  *      counts during the last interrupt.  The advantage of per interrupt
2819  *      computation is faster updates and more accurate ITR for the current
2820  *      traffic pattern.  Constants in this function were computed
2821  *      based on theoretical maximum wire speed and thresholds were set based
2822  *      on testing data as well as attempting to minimize response time
2823  *      while increasing bulk throughput.
2824  *      this functionality is controlled by the InterruptThrottleRate module
2825  *      parameter (see e1000_param.c)
2826  * @adapter: pointer to adapter
2827  * @itr_setting: current adapter->itr
2828  * @packets: the number of packets during this measurement interval
2829  * @bytes: the number of bytes during this measurement interval
2830  **/
2831 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2832                                    uint16_t itr_setting,
2833                                    int packets,
2834                                    int bytes)
2835 {
2836         unsigned int retval = itr_setting;
2837         struct e1000_hw *hw = &adapter->hw;
2838
2839         if (unlikely(hw->mac_type < e1000_82540))
2840                 goto update_itr_done;
2841
2842         if (packets == 0)
2843                 goto update_itr_done;
2844
2845         switch (itr_setting) {
2846         case lowest_latency:
2847                 /* jumbo frames get bulk treatment*/
2848                 if (bytes/packets > 8000)
2849                         retval = bulk_latency;
2850                 else if ((packets < 5) && (bytes > 512))
2851                         retval = low_latency;
2852                 break;
2853         case low_latency:  /* 50 usec aka 20000 ints/s */
2854                 if (bytes > 10000) {
2855                         /* jumbo frames need bulk latency setting */
2856                         if (bytes/packets > 8000)
2857                                 retval = bulk_latency;
2858                         else if ((packets < 10) || ((bytes/packets) > 1200))
2859                                 retval = bulk_latency;
2860                         else if ((packets > 35))
2861                                 retval = lowest_latency;
2862                 } else if (bytes/packets > 2000)
2863                         retval = bulk_latency;
2864                 else if (packets <= 2 && bytes < 512)
2865                         retval = lowest_latency;
2866                 break;
2867         case bulk_latency: /* 250 usec aka 4000 ints/s */
2868                 if (bytes > 25000) {
2869                         if (packets > 35)
2870                                 retval = low_latency;
2871                 } else if (bytes < 6000) {
2872                         retval = low_latency;
2873                 }
2874                 break;
2875         }
2876
2877 update_itr_done:
2878         return retval;
2879 }
2880
2881 static void e1000_set_itr(struct e1000_adapter *adapter)
2882 {
2883         struct e1000_hw *hw = &adapter->hw;
2884         uint16_t current_itr;
2885         uint32_t new_itr = adapter->itr;
2886
2887         if (unlikely(hw->mac_type < e1000_82540))
2888                 return;
2889
2890         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2891         if (unlikely(adapter->link_speed != SPEED_1000)) {
2892                 current_itr = 0;
2893                 new_itr = 4000;
2894                 goto set_itr_now;
2895         }
2896
2897         adapter->tx_itr = e1000_update_itr(adapter,
2898                                     adapter->tx_itr,
2899                                     adapter->total_tx_packets,
2900                                     adapter->total_tx_bytes);
2901         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2902         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2903                 adapter->tx_itr = low_latency;
2904
2905         adapter->rx_itr = e1000_update_itr(adapter,
2906                                     adapter->rx_itr,
2907                                     adapter->total_rx_packets,
2908                                     adapter->total_rx_bytes);
2909         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2910         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2911                 adapter->rx_itr = low_latency;
2912
2913         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2914
2915         switch (current_itr) {
2916         /* counts and packets in update_itr are dependent on these numbers */
2917         case lowest_latency:
2918                 new_itr = 70000;
2919                 break;
2920         case low_latency:
2921                 new_itr = 20000; /* aka hwitr = ~200 */
2922                 break;
2923         case bulk_latency:
2924                 new_itr = 4000;
2925                 break;
2926         default:
2927                 break;
2928         }
2929
2930 set_itr_now:
2931         if (new_itr != adapter->itr) {
2932                 /* this attempts to bias the interrupt rate towards Bulk
2933                  * by adding intermediate steps when interrupt rate is
2934                  * increasing */
2935                 new_itr = new_itr > adapter->itr ?
2936                              min(adapter->itr + (new_itr >> 2), new_itr) :
2937                              new_itr;
2938                 adapter->itr = new_itr;
2939                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2940         }
2941
2942         return;
2943 }
2944
2945 #define E1000_TX_FLAGS_CSUM             0x00000001
2946 #define E1000_TX_FLAGS_VLAN             0x00000002
2947 #define E1000_TX_FLAGS_TSO              0x00000004
2948 #define E1000_TX_FLAGS_IPV4             0x00000008
2949 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2950 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2951
2952 static int
2953 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2954           struct sk_buff *skb)
2955 {
2956         struct e1000_context_desc *context_desc;
2957         struct e1000_buffer *buffer_info;
2958         unsigned int i;
2959         uint32_t cmd_length = 0;
2960         uint16_t ipcse = 0, tucse, mss;
2961         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2962         int err;
2963
2964         if (skb_is_gso(skb)) {
2965                 if (skb_header_cloned(skb)) {
2966                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2967                         if (err)
2968                                 return err;
2969                 }
2970
2971                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2972                 mss = skb_shinfo(skb)->gso_size;
2973                 if (skb->protocol == htons(ETH_P_IP)) {
2974                         struct iphdr *iph = ip_hdr(skb);
2975                         iph->tot_len = 0;
2976                         iph->check = 0;
2977                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2978                                                                  iph->daddr, 0,
2979                                                                  IPPROTO_TCP,
2980                                                                  0);
2981                         cmd_length = E1000_TXD_CMD_IP;
2982                         ipcse = skb_transport_offset(skb) - 1;
2983                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2984                         ipv6_hdr(skb)->payload_len = 0;
2985                         tcp_hdr(skb)->check =
2986                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2987                                                  &ipv6_hdr(skb)->daddr,
2988                                                  0, IPPROTO_TCP, 0);
2989                         ipcse = 0;
2990                 }
2991                 ipcss = skb_network_offset(skb);
2992                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2993                 tucss = skb_transport_offset(skb);
2994                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2995                 tucse = 0;
2996
2997                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2998                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2999
3000                 i = tx_ring->next_to_use;
3001                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3002                 buffer_info = &tx_ring->buffer_info[i];
3003
3004                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3005                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3006                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3007                 context_desc->upper_setup.tcp_fields.tucss = tucss;
3008                 context_desc->upper_setup.tcp_fields.tucso = tucso;
3009                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3010                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3011                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3012                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3013
3014                 buffer_info->time_stamp = jiffies;
3015                 buffer_info->next_to_watch = i;
3016
3017                 if (++i == tx_ring->count) i = 0;
3018                 tx_ring->next_to_use = i;
3019
3020                 return TRUE;
3021         }
3022         return FALSE;
3023 }
3024
3025 static boolean_t
3026 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3027               struct sk_buff *skb)
3028 {
3029         struct e1000_context_desc *context_desc;
3030         struct e1000_buffer *buffer_info;
3031         unsigned int i;
3032         uint8_t css;
3033
3034         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
3035                 css = skb_transport_offset(skb);
3036
3037                 i = tx_ring->next_to_use;
3038                 buffer_info = &tx_ring->buffer_info[i];
3039                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3040
3041                 context_desc->lower_setup.ip_config = 0;
3042                 context_desc->upper_setup.tcp_fields.tucss = css;
3043                 context_desc->upper_setup.tcp_fields.tucso =
3044                         css + skb->csum_offset;
3045                 context_desc->upper_setup.tcp_fields.tucse = 0;
3046                 context_desc->tcp_seg_setup.data = 0;
3047                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
3048
3049                 buffer_info->time_stamp = jiffies;
3050                 buffer_info->next_to_watch = i;
3051
3052                 if (unlikely(++i == tx_ring->count)) i = 0;
3053                 tx_ring->next_to_use = i;
3054
3055                 return TRUE;
3056         }
3057
3058         return FALSE;
3059 }
3060
3061 #define E1000_MAX_TXD_PWR       12
3062 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
3063
3064 static int
3065 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3066              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
3067              unsigned int nr_frags, unsigned int mss)
3068 {
3069         struct e1000_buffer *buffer_info;
3070         unsigned int len = skb->len;
3071         unsigned int offset = 0, size, count = 0, i;
3072         unsigned int f;
3073         len -= skb->data_len;
3074
3075         i = tx_ring->next_to_use;
3076
3077         while (len) {
3078                 buffer_info = &tx_ring->buffer_info[i];
3079                 size = min(len, max_per_txd);
3080                 /* Workaround for Controller erratum --
3081                  * descriptor for non-tso packet in a linear SKB that follows a
3082                  * tso gets written back prematurely before the data is fully
3083                  * DMA'd to the controller */
3084                 if (!skb->data_len && tx_ring->last_tx_tso &&
3085                     !skb_is_gso(skb)) {
3086                         tx_ring->last_tx_tso = 0;
3087                         size -= 4;
3088                 }
3089
3090                 /* Workaround for premature desc write-backs
3091                  * in TSO mode.  Append 4-byte sentinel desc */
3092                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3093                         size -= 4;
3094                 /* work-around for errata 10 and it applies
3095                  * to all controllers in PCI-X mode
3096                  * The fix is to make sure that the first descriptor of a
3097                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3098                  */
3099                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3100                                 (size > 2015) && count == 0))
3101                         size = 2015;
3102
3103                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3104                  * terminating buffers within evenly-aligned dwords. */
3105                 if (unlikely(adapter->pcix_82544 &&
3106                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3107                    size > 4))
3108                         size -= 4;
3109
3110                 buffer_info->length = size;
3111                 buffer_info->dma =
3112                         pci_map_single(adapter->pdev,
3113                                 skb->data + offset,
3114                                 size,
3115                                 PCI_DMA_TODEVICE);
3116                 buffer_info->time_stamp = jiffies;
3117                 buffer_info->next_to_watch = i;
3118
3119                 len -= size;
3120                 offset += size;
3121                 count++;
3122                 if (unlikely(++i == tx_ring->count)) i = 0;
3123         }
3124
3125         for (f = 0; f < nr_frags; f++) {
3126                 struct skb_frag_struct *frag;
3127
3128                 frag = &skb_shinfo(skb)->frags[f];
3129                 len = frag->size;
3130                 offset = frag->page_offset;
3131
3132                 while (len) {
3133                         buffer_info = &tx_ring->buffer_info[i];
3134                         size = min(len, max_per_txd);
3135                         /* Workaround for premature desc write-backs
3136                          * in TSO mode.  Append 4-byte sentinel desc */
3137                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3138                                 size -= 4;
3139                         /* Workaround for potential 82544 hang in PCI-X.
3140                          * Avoid terminating buffers within evenly-aligned
3141                          * dwords. */
3142                         if (unlikely(adapter->pcix_82544 &&
3143                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3144                            size > 4))
3145                                 size -= 4;
3146
3147                         buffer_info->length = size;
3148                         buffer_info->dma =
3149                                 pci_map_page(adapter->pdev,
3150                                         frag->page,
3151                                         offset,
3152                                         size,
3153                                         PCI_DMA_TODEVICE);
3154                         buffer_info->time_stamp = jiffies;
3155                         buffer_info->next_to_watch = i;
3156
3157                         len -= size;
3158                         offset += size;
3159                         count++;
3160                         if (unlikely(++i == tx_ring->count)) i = 0;
3161                 }
3162         }
3163
3164         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3165         tx_ring->buffer_info[i].skb = skb;
3166         tx_ring->buffer_info[first].next_to_watch = i;
3167
3168         return count;
3169 }
3170
3171 static void
3172 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3173                int tx_flags, int count)
3174 {
3175         struct e1000_tx_desc *tx_desc = NULL;
3176         struct e1000_buffer *buffer_info;
3177         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3178         unsigned int i;
3179
3180         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3181                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3182                              E1000_TXD_CMD_TSE;
3183                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3184
3185                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3186                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3187         }
3188
3189         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3190                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3191                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3192         }
3193
3194         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3195                 txd_lower |= E1000_TXD_CMD_VLE;
3196                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3197         }
3198
3199         i = tx_ring->next_to_use;
3200
3201         while (count--) {
3202                 buffer_info = &tx_ring->buffer_info[i];
3203                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3204                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3205                 tx_desc->lower.data =
3206                         cpu_to_le32(txd_lower | buffer_info->length);
3207                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3208                 if (unlikely(++i == tx_ring->count)) i = 0;
3209         }
3210
3211         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3212
3213         /* Force memory writes to complete before letting h/w
3214          * know there are new descriptors to fetch.  (Only
3215          * applicable for weak-ordered memory model archs,
3216          * such as IA-64). */
3217         wmb();
3218
3219         tx_ring->next_to_use = i;
3220         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3221         /* we need this if more than one processor can write to our tail
3222          * at a time, it syncronizes IO on IA64/Altix systems */
3223         mmiowb();
3224 }
3225
3226 /**
3227  * 82547 workaround to avoid controller hang in half-duplex environment.
3228  * The workaround is to avoid queuing a large packet that would span
3229  * the internal Tx FIFO ring boundary by notifying the stack to resend
3230  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3231  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3232  * to the beginning of the Tx FIFO.
3233  **/
3234
3235 #define E1000_FIFO_HDR                  0x10
3236 #define E1000_82547_PAD_LEN             0x3E0
3237
3238 static int
3239 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3240 {
3241         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3242         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3243
3244         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3245
3246         if (adapter->link_duplex != HALF_DUPLEX)
3247                 goto no_fifo_stall_required;
3248
3249         if (atomic_read(&adapter->tx_fifo_stall))
3250                 return 1;
3251
3252         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3253                 atomic_set(&adapter->tx_fifo_stall, 1);
3254                 return 1;
3255         }
3256
3257 no_fifo_stall_required:
3258         adapter->tx_fifo_head += skb_fifo_len;
3259         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3260                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3261         return 0;
3262 }
3263
3264 #define MINIMUM_DHCP_PACKET_SIZE 282
3265 static int
3266 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3267 {
3268         struct e1000_hw *hw =  &adapter->hw;
3269         uint16_t length, offset;
3270         if (vlan_tx_tag_present(skb)) {
3271                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3272                         ( adapter->hw.mng_cookie.status &
3273                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3274                         return 0;
3275         }
3276         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3277                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3278                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3279                         const struct iphdr *ip =
3280                                 (struct iphdr *)((uint8_t *)skb->data+14);
3281                         if (IPPROTO_UDP == ip->protocol) {
3282                                 struct udphdr *udp =
3283                                         (struct udphdr *)((uint8_t *)ip +
3284                                                 (ip->ihl << 2));
3285                                 if (ntohs(udp->dest) == 67) {
3286                                         offset = (uint8_t *)udp + 8 - skb->data;
3287                                         length = skb->len - offset;
3288
3289                                         return e1000_mng_write_dhcp_info(hw,
3290                                                         (uint8_t *)udp + 8,
3291                                                         length);
3292                                 }
3293                         }
3294                 }
3295         }
3296         return 0;
3297 }
3298
3299 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3300 {
3301         struct e1000_adapter *adapter = netdev_priv(netdev);
3302         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3303
3304         netif_stop_queue(netdev);
3305         /* Herbert's original patch had:
3306          *  smp_mb__after_netif_stop_queue();
3307          * but since that doesn't exist yet, just open code it. */
3308         smp_mb();
3309
3310         /* We need to check again in a case another CPU has just
3311          * made room available. */
3312         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3313                 return -EBUSY;
3314
3315         /* A reprieve! */
3316         netif_start_queue(netdev);
3317         ++adapter->restart_queue;
3318         return 0;
3319 }
3320
3321 static int e1000_maybe_stop_tx(struct net_device *netdev,
3322                                struct e1000_tx_ring *tx_ring, int size)
3323 {
3324         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3325                 return 0;
3326         return __e1000_maybe_stop_tx(netdev, size);
3327 }
3328
3329 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3330 static int
3331 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3332 {
3333         struct e1000_adapter *adapter = netdev_priv(netdev);
3334         struct e1000_tx_ring *tx_ring;
3335         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3336         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3337         unsigned int tx_flags = 0;
3338         unsigned int len = skb->len - skb->data_len;
3339         unsigned long flags;
3340         unsigned int nr_frags;
3341         unsigned int mss;
3342         int count = 0;
3343         int tso;
3344         unsigned int f;
3345
3346         /* This goes back to the question of how to logically map a tx queue
3347          * to a flow.  Right now, performance is impacted slightly negatively
3348          * if using multiple tx queues.  If the stack breaks away from a
3349          * single qdisc implementation, we can look at this again. */
3350         tx_ring = adapter->tx_ring;
3351
3352         if (unlikely(skb->len <= 0)) {
3353                 dev_kfree_skb_any(skb);
3354                 return NETDEV_TX_OK;
3355         }
3356
3357         /* 82571 and newer doesn't need the workaround that limited descriptor
3358          * length to 4kB */
3359         if (adapter->hw.mac_type >= e1000_82571)
3360                 max_per_txd = 8192;
3361
3362         mss = skb_shinfo(skb)->gso_size;
3363         /* The controller does a simple calculation to
3364          * make sure there is enough room in the FIFO before
3365          * initiating the DMA for each buffer.  The calc is:
3366          * 4 = ceil(buffer len/mss).  To make sure we don't
3367          * overrun the FIFO, adjust the max buffer len if mss
3368          * drops. */
3369         if (mss) {
3370                 uint8_t hdr_len;
3371                 max_per_txd = min(mss << 2, max_per_txd);
3372                 max_txd_pwr = fls(max_per_txd) - 1;
3373
3374                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3375                 * points to just header, pull a few bytes of payload from
3376                 * frags into skb->data */
3377                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3378                 if (skb->data_len && hdr_len == len) {
3379                         switch (adapter->hw.mac_type) {
3380                                 unsigned int pull_size;
3381                         case e1000_82544:
3382                                 /* Make sure we have room to chop off 4 bytes,
3383                                  * and that the end alignment will work out to
3384                                  * this hardware's requirements
3385                                  * NOTE: this is a TSO only workaround
3386                                  * if end byte alignment not correct move us
3387                                  * into the next dword */
3388                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3389                                         break;
3390                                 /* fall through */
3391                         case e1000_82571:
3392                         case e1000_82572:
3393                         case e1000_82573:
3394                         case e1000_ich8lan:
3395                                 pull_size = min((unsigned int)4, skb->data_len);
3396                                 if (!__pskb_pull_tail(skb, pull_size)) {
3397                                         DPRINTK(DRV, ERR,
3398                                                 "__pskb_pull_tail failed.\n");
3399                                         dev_kfree_skb_any(skb);
3400                                         return NETDEV_TX_OK;
3401                                 }
3402                                 len = skb->len - skb->data_len;
3403                                 break;
3404                         default:
3405                                 /* do nothing */
3406                                 break;
3407                         }
3408                 }
3409         }
3410
3411         /* reserve a descriptor for the offload context */
3412         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3413                 count++;
3414         count++;
3415
3416         /* Controller Erratum workaround */
3417         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3418                 count++;
3419
3420         count += TXD_USE_COUNT(len, max_txd_pwr);
3421
3422         if (adapter->pcix_82544)
3423                 count++;
3424
3425         /* work-around for errata 10 and it applies to all controllers
3426          * in PCI-X mode, so add one more descriptor to the count
3427          */
3428         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3429                         (len > 2015)))
3430                 count++;
3431
3432         nr_frags = skb_shinfo(skb)->nr_frags;
3433         for (f = 0; f < nr_frags; f++)
3434                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3435                                        max_txd_pwr);
3436         if (adapter->pcix_82544)
3437                 count += nr_frags;
3438
3439
3440         if (adapter->hw.tx_pkt_filtering &&
3441             (adapter->hw.mac_type == e1000_82573))
3442                 e1000_transfer_dhcp_info(adapter, skb);
3443
3444         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3445                 /* Collision - tell upper layer to requeue */
3446                 return NETDEV_TX_LOCKED;
3447
3448         /* need: count + 2 desc gap to keep tail from touching
3449          * head, otherwise try next time */
3450         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3451                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3452                 return NETDEV_TX_BUSY;
3453         }
3454
3455         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3456                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3457                         netif_stop_queue(netdev);
3458                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3459                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3460                         return NETDEV_TX_BUSY;
3461                 }
3462         }
3463
3464         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3465                 tx_flags |= E1000_TX_FLAGS_VLAN;
3466                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3467         }
3468
3469         first = tx_ring->next_to_use;
3470
3471         tso = e1000_tso(adapter, tx_ring, skb);
3472         if (tso < 0) {
3473                 dev_kfree_skb_any(skb);
3474                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3475                 return NETDEV_TX_OK;
3476         }
3477
3478         if (likely(tso)) {
3479                 tx_ring->last_tx_tso = 1;
3480                 tx_flags |= E1000_TX_FLAGS_TSO;
3481         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3482                 tx_flags |= E1000_TX_FLAGS_CSUM;
3483
3484         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3485          * 82571 hardware supports TSO capabilities for IPv6 as well...
3486          * no longer assume, we must. */
3487         if (likely(skb->protocol == htons(ETH_P_IP)))
3488                 tx_flags |= E1000_TX_FLAGS_IPV4;
3489
3490         e1000_tx_queue(adapter, tx_ring, tx_flags,
3491                        e1000_tx_map(adapter, tx_ring, skb, first,
3492                                     max_per_txd, nr_frags, mss));
3493
3494         netdev->trans_start = jiffies;
3495
3496         /* Make sure there is space in the ring for the next send. */
3497         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3498
3499         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3500         return NETDEV_TX_OK;
3501 }
3502
3503 /**
3504  * e1000_tx_timeout - Respond to a Tx Hang
3505  * @netdev: network interface device structure
3506  **/
3507
3508 static void
3509 e1000_tx_timeout(struct net_device *netdev)
3510 {
3511         struct e1000_adapter *adapter = netdev_priv(netdev);
3512
3513         /* Do the reset outside of interrupt context */
3514         adapter->tx_timeout_count++;
3515         schedule_work(&adapter->reset_task);
3516 }
3517
3518 static void
3519 e1000_reset_task(struct work_struct *work)
3520 {
3521         struct e1000_adapter *adapter =
3522                 container_of(work, struct e1000_adapter, reset_task);
3523
3524         e1000_reinit_locked(adapter);
3525 }
3526
3527 /**
3528  * e1000_get_stats - Get System Network Statistics
3529  * @netdev: network interface device structure
3530  *
3531  * Returns the address of the device statistics structure.
3532  * The statistics are actually updated from the timer callback.
3533  **/
3534
3535 static struct net_device_stats *
3536 e1000_get_stats(struct net_device *netdev)
3537 {
3538         struct e1000_adapter *adapter = netdev_priv(netdev);
3539
3540         /* only return the current stats */
3541         return &adapter->net_stats;
3542 }
3543
3544 /**
3545  * e1000_change_mtu - Change the Maximum Transfer Unit
3546  * @netdev: network interface device structure
3547  * @new_mtu: new value for maximum frame size
3548  *
3549  * Returns 0 on success, negative on failure
3550  **/
3551
3552 static int
3553 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3554 {
3555         struct e1000_adapter *adapter = netdev_priv(netdev);
3556         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3557         uint16_t eeprom_data = 0;
3558
3559         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3560             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3561                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3562                 return -EINVAL;
3563         }
3564
3565         /* Adapter-specific max frame size limits. */
3566         switch (adapter->hw.mac_type) {
3567         case e1000_undefined ... e1000_82542_rev2_1:
3568         case e1000_ich8lan:
3569                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3570                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3571                         return -EINVAL;
3572                 }
3573                 break;
3574         case e1000_82573:
3575                 /* Jumbo Frames not supported if:
3576                  * - this is not an 82573L device
3577                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3578                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3579                                   &eeprom_data);
3580                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3581                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3582                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3583                                 DPRINTK(PROBE, ERR,
3584                                         "Jumbo Frames not supported.\n");
3585                                 return -EINVAL;
3586                         }
3587                         break;
3588                 }
3589                 /* ERT will be enabled later to enable wire speed receives */
3590
3591                 /* fall through to get support */
3592         case e1000_82571:
3593         case e1000_82572:
3594         case e1000_80003es2lan:
3595 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3596                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3597                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3598                         return -EINVAL;
3599                 }
3600                 break;
3601         default:
3602                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3603                 break;
3604         }
3605
3606         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3607          * means we reserve 2 more, this pushes us to allocate from the next
3608          * larger slab size
3609          * i.e. RXBUFFER_2048 --> size-4096 slab */
3610
3611         if (max_frame <= E1000_RXBUFFER_256)
3612                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3613         else if (max_frame <= E1000_RXBUFFER_512)
3614                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3615         else if (max_frame <= E1000_RXBUFFER_1024)
3616                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3617         else if (max_frame <= E1000_RXBUFFER_2048)
3618                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3619         else if (max_frame <= E1000_RXBUFFER_4096)
3620                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3621         else if (max_frame <= E1000_RXBUFFER_8192)
3622                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3623         else if (max_frame <= E1000_RXBUFFER_16384)
3624                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3625
3626         /* adjust allocation if LPE protects us, and we aren't using SBP */
3627         if (!adapter->hw.tbi_compatibility_on &&
3628             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3629              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3630                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3631
3632         netdev->mtu = new_mtu;
3633         adapter->hw.max_frame_size = max_frame;
3634
3635         if (netif_running(netdev))
3636                 e1000_reinit_locked(adapter);
3637
3638         return 0;
3639 }
3640
3641 /**
3642  * e1000_update_stats - Update the board statistics counters
3643  * @adapter: board private structure
3644  **/
3645
3646 void
3647 e1000_update_stats(struct e1000_adapter *adapter)
3648 {
3649         struct e1000_hw *hw = &adapter->hw;
3650         struct pci_dev *pdev = adapter->pdev;
3651         unsigned long flags;
3652         uint16_t phy_tmp;
3653
3654 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3655
3656         /*
3657          * Prevent stats update while adapter is being reset, or if the pci
3658          * connection is down.
3659          */
3660         if (adapter->link_speed == 0)
3661                 return;
3662         if (pci_channel_offline(pdev))
3663                 return;
3664
3665         spin_lock_irqsave(&adapter->stats_lock, flags);
3666
3667         /* these counters are modified from e1000_tbi_adjust_stats,
3668          * called from the interrupt context, so they must only
3669          * be written while holding adapter->stats_lock
3670          */
3671
3672         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3673         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3674         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3675         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3676         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3677         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3678         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3679
3680         if (adapter->hw.mac_type != e1000_ich8lan) {
3681                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3682                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3683                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3684                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3685                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3686                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3687         }
3688
3689         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3690         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3691         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3692         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3693         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3694         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3695         adapter->stats.dc += E1000_READ_REG(hw, DC);
3696         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3697         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3698         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3699         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3700         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3701         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3702         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3703         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3704         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3705         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3706         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3707         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3708         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3709         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3710         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3711         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3712         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3713         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3714         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3715
3716         if (adapter->hw.mac_type != e1000_ich8lan) {
3717                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3718                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3719                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3720                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3721                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3722                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3723         }
3724
3725         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3726         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3727
3728         /* used for adaptive IFS */
3729
3730         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3731         adapter->stats.tpt += hw->tx_packet_delta;
3732         hw->collision_delta = E1000_READ_REG(hw, COLC);
3733         adapter->stats.colc += hw->collision_delta;
3734
3735         if (hw->mac_type >= e1000_82543) {
3736                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3737                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3738                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3739                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3740                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3741                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3742         }
3743         if (hw->mac_type > e1000_82547_rev_2) {
3744                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3745                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3746
3747                 if (adapter->hw.mac_type != e1000_ich8lan) {
3748                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3749                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3750                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3751                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3752                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3753                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3754                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3755                 }
3756         }
3757
3758         /* Fill out the OS statistics structure */
3759         adapter->net_stats.multicast = adapter->stats.mprc;
3760         adapter->net_stats.collisions = adapter->stats.colc;
3761
3762         /* Rx Errors */
3763
3764         /* RLEC on some newer hardware can be incorrect so build
3765         * our own version based on RUC and ROC */
3766         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3767                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3768                 adapter->stats.ruc + adapter->stats.roc +
3769                 adapter->stats.cexterr;
3770         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3771         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3772         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3773         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3774         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3775
3776         /* Tx Errors */
3777         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3778         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3779         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3780         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3781         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3782         if (adapter->hw.bad_tx_carr_stats_fd &&
3783             adapter->link_duplex == FULL_DUPLEX) {
3784                 adapter->net_stats.tx_carrier_errors = 0;
3785                 adapter->stats.tncrs = 0;
3786         }
3787
3788         /* Tx Dropped needs to be maintained elsewhere */
3789
3790         /* Phy Stats */
3791         if (hw->media_type == e1000_media_type_copper) {
3792                 if ((adapter->link_speed == SPEED_1000) &&
3793                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3794                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3795                         adapter->phy_stats.idle_errors += phy_tmp;
3796                 }
3797
3798                 if ((hw->mac_type <= e1000_82546) &&
3799                    (hw->phy_type == e1000_phy_m88) &&
3800                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3801                         adapter->phy_stats.receive_errors += phy_tmp;
3802         }
3803
3804         /* Management Stats */
3805         if (adapter->hw.has_smbus) {
3806                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3807                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3808                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3809         }
3810
3811         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3812 }
3813
3814 /**
3815  * e1000_intr_msi - Interrupt Handler
3816  * @irq: interrupt number
3817  * @data: pointer to a network interface device structure
3818  **/
3819
3820 static irqreturn_t
3821 e1000_intr_msi(int irq, void *data)
3822 {
3823         struct net_device *netdev = data;
3824         struct e1000_adapter *adapter = netdev_priv(netdev);
3825         struct e1000_hw *hw = &adapter->hw;
3826 #ifndef CONFIG_E1000_NAPI
3827         int i;
3828 #endif
3829         uint32_t icr = E1000_READ_REG(hw, ICR);
3830
3831 #ifdef CONFIG_E1000_NAPI
3832         /* read ICR disables interrupts using IAM, so keep up with our
3833          * enable/disable accounting */
3834         atomic_inc(&adapter->irq_sem);
3835 #endif
3836         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3837                 hw->get_link_status = 1;
3838                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3839                  * link down event; disable receives here in the ISR and reset
3840                  * adapter in watchdog */
3841                 if (netif_carrier_ok(netdev) &&
3842                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3843                         /* disable receives */
3844                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3845                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3846                 }
3847                 /* guard against interrupt when we're going down */
3848                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3849                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3850         }
3851
3852 #ifdef CONFIG_E1000_NAPI
3853         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3854                 adapter->total_tx_bytes = 0;
3855                 adapter->total_tx_packets = 0;
3856                 adapter->total_rx_bytes = 0;
3857                 adapter->total_rx_packets = 0;
3858                 __netif_rx_schedule(netdev, &adapter->napi);
3859         } else
3860                 e1000_irq_enable(adapter);
3861 #else
3862         adapter->total_tx_bytes = 0;
3863         adapter->total_rx_bytes = 0;
3864         adapter->total_tx_packets = 0;
3865         adapter->total_rx_packets = 0;
3866
3867         for (i = 0; i < E1000_MAX_INTR; i++)
3868                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3869                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3870                         break;
3871
3872         if (likely(adapter->itr_setting & 3))
3873                 e1000_set_itr(adapter);
3874 #endif
3875
3876         return IRQ_HANDLED;
3877 }
3878
3879 /**
3880  * e1000_intr - Interrupt Handler
3881  * @irq: interrupt number
3882  * @data: pointer to a network interface device structure
3883  **/
3884
3885 static irqreturn_t
3886 e1000_intr(int irq, void *data)
3887 {
3888         struct net_device *netdev = data;
3889         struct e1000_adapter *adapter = netdev_priv(netdev);
3890         struct e1000_hw *hw = &adapter->hw;
3891         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3892 #ifndef CONFIG_E1000_NAPI
3893         int i;
3894 #endif
3895         if (unlikely(!icr))
3896                 return IRQ_NONE;  /* Not our interrupt */
3897
3898 #ifdef CONFIG_E1000_NAPI
3899         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3900          * not set, then the adapter didn't send an interrupt */
3901         if (unlikely(hw->mac_type >= e1000_82571 &&
3902                      !(icr & E1000_ICR_INT_ASSERTED)))
3903                 return IRQ_NONE;
3904
3905         /* Interrupt Auto-Mask...upon reading ICR,
3906          * interrupts are masked.  No need for the
3907          * IMC write, but it does mean we should
3908          * account for it ASAP. */
3909         if (likely(hw->mac_type >= e1000_82571))
3910                 atomic_inc(&adapter->irq_sem);
3911 #endif
3912
3913         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3914                 hw->get_link_status = 1;
3915                 /* 80003ES2LAN workaround--
3916                  * For packet buffer work-around on link down event;
3917                  * disable receives here in the ISR and
3918                  * reset adapter in watchdog
3919                  */
3920                 if (netif_carrier_ok(netdev) &&
3921                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3922                         /* disable receives */
3923                         rctl = E1000_READ_REG(hw, RCTL);
3924                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3925                 }
3926                 /* guard against interrupt when we're going down */
3927                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3928                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3929         }
3930
3931 #ifdef CONFIG_E1000_NAPI
3932         if (unlikely(hw->mac_type < e1000_82571)) {
3933                 /* disable interrupts, without the synchronize_irq bit */
3934                 atomic_inc(&adapter->irq_sem);
3935                 E1000_WRITE_REG(hw, IMC, ~0);
3936                 E1000_WRITE_FLUSH(hw);
3937         }
3938         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3939                 adapter->total_tx_bytes = 0;
3940                 adapter->total_tx_packets = 0;
3941                 adapter->total_rx_bytes = 0;
3942                 adapter->total_rx_packets = 0;
3943                 __netif_rx_schedule(netdev, &adapter->napi);
3944         } else
3945                 /* this really should not happen! if it does it is basically a
3946                  * bug, but not a hard error, so enable ints and continue */
3947                 e1000_irq_enable(adapter);
3948 #else
3949         /* Writing IMC and IMS is needed for 82547.
3950          * Due to Hub Link bus being occupied, an interrupt
3951          * de-assertion message is not able to be sent.
3952          * When an interrupt assertion message is generated later,
3953          * two messages are re-ordered and sent out.
3954          * That causes APIC to think 82547 is in de-assertion
3955          * state, while 82547 is in assertion state, resulting
3956          * in dead lock. Writing IMC forces 82547 into
3957          * de-assertion state.
3958          */
3959         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3960                 atomic_inc(&adapter->irq_sem);
3961                 E1000_WRITE_REG(hw, IMC, ~0);
3962         }
3963
3964         adapter->total_tx_bytes = 0;
3965         adapter->total_rx_bytes = 0;
3966         adapter->total_tx_packets = 0;
3967         adapter->total_rx_packets = 0;
3968
3969         for (i = 0; i < E1000_MAX_INTR; i++)
3970                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3971                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3972                         break;
3973
3974         if (likely(adapter->itr_setting & 3))
3975                 e1000_set_itr(adapter);
3976
3977         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3978                 e1000_irq_enable(adapter);
3979
3980 #endif
3981         return IRQ_HANDLED;
3982 }
3983
3984 #ifdef CONFIG_E1000_NAPI
3985 /**
3986  * e1000_clean - NAPI Rx polling callback
3987  * @adapter: board private structure
3988  **/
3989
3990 static int
3991 e1000_clean(struct napi_struct *napi, int budget)
3992 {
3993         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3994         struct net_device *poll_dev = adapter->netdev;
3995         int tx_cleaned = 0, work_done = 0;
3996
3997         /* Must NOT use netdev_priv macro here. */
3998         adapter = poll_dev->priv;
3999
4000         /* e1000_clean is called per-cpu.  This lock protects
4001          * tx_ring[0] from being cleaned by multiple cpus
4002          * simultaneously.  A failure obtaining the lock means
4003          * tx_ring[0] is currently being cleaned anyway. */
4004         if (spin_trylock(&adapter->tx_queue_lock)) {
4005                 tx_cleaned = e1000_clean_tx_irq(adapter,
4006                                                 &adapter->tx_ring[0]);
4007                 spin_unlock(&adapter->tx_queue_lock);
4008         }
4009
4010         adapter->clean_rx(adapter, &adapter->rx_ring[0],
4011                           &work_done, budget);
4012
4013         if (tx_cleaned)
4014                 work_done = budget;
4015
4016         /* If budget not fully consumed, exit the polling mode */
4017         if (work_done < budget) {
4018                 if (likely(adapter->itr_setting & 3))
4019                         e1000_set_itr(adapter);
4020                 netif_rx_complete(poll_dev, napi);
4021                 e1000_irq_enable(adapter);
4022         }
4023
4024         return work_done;
4025 }
4026
4027 #endif
4028 /**
4029  * e1000_clean_tx_irq - Reclaim resources after transmit completes
4030  * @adapter: board private structure
4031  **/
4032
4033 static boolean_t
4034 e1000_clean_tx_irq(struct e1000_adapter *adapter,
4035                    struct e1000_tx_ring *tx_ring)
4036 {
4037         struct net_device *netdev = adapter->netdev;
4038         struct e1000_tx_desc *tx_desc, *eop_desc;
4039         struct e1000_buffer *buffer_info;
4040         unsigned int i, eop;
4041 #ifdef CONFIG_E1000_NAPI
4042         unsigned int count = 0;
4043 #endif
4044         boolean_t cleaned = FALSE;
4045         unsigned int total_tx_bytes=0, total_tx_packets=0;
4046
4047         i = tx_ring->next_to_clean;
4048         eop = tx_ring->buffer_info[i].next_to_watch;
4049         eop_desc = E1000_TX_DESC(*tx_ring, eop);
4050
4051         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
4052                 for (cleaned = FALSE; !cleaned; ) {
4053                         tx_desc = E1000_TX_DESC(*tx_ring, i);
4054                         buffer_info = &tx_ring->buffer_info[i];
4055                         cleaned = (i == eop);
4056
4057                         if (cleaned) {
4058                                 struct sk_buff *skb = buffer_info->skb;
4059                                 unsigned int segs, bytecount;
4060                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
4061                                 /* multiply data chunks by size of headers */
4062                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
4063                                             skb->len;
4064                                 total_tx_packets += segs;
4065                                 total_tx_bytes += bytecount;
4066                         }
4067                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4068                         tx_desc->upper.data = 0;
4069
4070                         if (unlikely(++i == tx_ring->count)) i = 0;
4071                 }
4072
4073                 eop = tx_ring->buffer_info[i].next_to_watch;
4074                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4075 #ifdef CONFIG_E1000_NAPI
4076 #define E1000_TX_WEIGHT 64
4077                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4078                 if (count++ == E1000_TX_WEIGHT) break;
4079 #endif
4080         }
4081
4082         tx_ring->next_to_clean = i;
4083
4084 #define TX_WAKE_THRESHOLD 32
4085         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4086                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4087                 /* Make sure that anybody stopping the queue after this
4088                  * sees the new next_to_clean.
4089                  */
4090                 smp_mb();
4091                 if (netif_queue_stopped(netdev)) {
4092                         netif_wake_queue(netdev);
4093                         ++adapter->restart_queue;
4094                 }
4095         }
4096
4097         if (adapter->detect_tx_hung) {
4098                 /* Detect a transmit hang in hardware, this serializes the
4099                  * check with the clearing of time_stamp and movement of i */
4100                 adapter->detect_tx_hung = FALSE;
4101                 if (tx_ring->buffer_info[eop].dma &&
4102                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4103                                (adapter->tx_timeout_factor * HZ))
4104                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4105                          E1000_STATUS_TXOFF)) {
4106
4107                         /* detected Tx unit hang */
4108                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4109                                         "  Tx Queue             <%lu>\n"
4110                                         "  TDH                  <%x>\n"
4111                                         "  TDT                  <%x>\n"
4112                                         "  next_to_use          <%x>\n"
4113                                         "  next_to_clean        <%x>\n"
4114                                         "buffer_info[next_to_clean]\n"
4115                                         "  time_stamp           <%lx>\n"
4116                                         "  next_to_watch        <%x>\n"
4117                                         "  jiffies              <%lx>\n"
4118                                         "  next_to_watch.status <%x>\n",
4119                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4120                                         sizeof(struct e1000_tx_ring)),
4121                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4122                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4123                                 tx_ring->next_to_use,
4124                                 tx_ring->next_to_clean,
4125                                 tx_ring->buffer_info[eop].time_stamp,
4126                                 eop,
4127                                 jiffies,
4128                                 eop_desc->upper.fields.status);
4129                         netif_stop_queue(netdev);
4130                 }
4131         }
4132         adapter->total_tx_bytes += total_tx_bytes;
4133         adapter->total_tx_packets += total_tx_packets;
4134         adapter->net_stats.tx_bytes += total_tx_bytes;
4135         adapter->net_stats.tx_packets += total_tx_packets;
4136         return cleaned;
4137 }
4138
4139 /**
4140  * e1000_rx_checksum - Receive Checksum Offload for 82543
4141  * @adapter:     board private structure
4142  * @status_err:  receive descriptor status and error fields
4143  * @csum:        receive descriptor csum field
4144  * @sk_buff:     socket buffer with received data
4145  **/
4146
4147 static void
4148 e1000_rx_checksum(struct e1000_adapter *adapter,
4149                   uint32_t status_err, uint32_t csum,
4150                   struct sk_buff *skb)
4151 {
4152         uint16_t status = (uint16_t)status_err;
4153         uint8_t errors = (uint8_t)(status_err >> 24);
4154         skb->ip_summed = CHECKSUM_NONE;
4155
4156         /* 82543 or newer only */
4157         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4158         /* Ignore Checksum bit is set */
4159         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4160         /* TCP/UDP checksum error bit is set */
4161         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4162                 /* let the stack verify checksum errors */
4163                 adapter->hw_csum_err++;
4164                 return;
4165         }
4166         /* TCP/UDP Checksum has not been calculated */
4167         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4168                 if (!(status & E1000_RXD_STAT_TCPCS))
4169                         return;
4170         } else {
4171                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4172                         return;
4173         }
4174         /* It must be a TCP or UDP packet with a valid checksum */
4175         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4176                 /* TCP checksum is good */
4177                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4178         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4179                 /* IP fragment with UDP payload */
4180                 /* Hardware complements the payload checksum, so we undo it
4181                  * and then put the value in host order for further stack use.
4182                  */
4183                 __sum16 sum = (__force __sum16)htons(csum);
4184                 skb->csum = csum_unfold(~sum);
4185                 skb->ip_summed = CHECKSUM_COMPLETE;
4186         }
4187         adapter->hw_csum_good++;
4188 }
4189
4190 /**
4191  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4192  * @adapter: board private structure
4193  **/
4194
4195 static boolean_t
4196 #ifdef CONFIG_E1000_NAPI
4197 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4198                    struct e1000_rx_ring *rx_ring,
4199                    int *work_done, int work_to_do)
4200 #else
4201 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4202                    struct e1000_rx_ring *rx_ring)
4203 #endif
4204 {
4205         struct net_device *netdev = adapter->netdev;
4206         struct pci_dev *pdev = adapter->pdev;
4207         struct e1000_rx_desc *rx_desc, *next_rxd;
4208         struct e1000_buffer *buffer_info, *next_buffer;
4209         unsigned long flags;
4210         uint32_t length;
4211         uint8_t last_byte;
4212         unsigned int i;
4213         int cleaned_count = 0;
4214         boolean_t cleaned = FALSE;
4215         unsigned int total_rx_bytes=0, total_rx_packets=0;
4216
4217         i = rx_ring->next_to_clean;
4218         rx_desc = E1000_RX_DESC(*rx_ring, i);
4219         buffer_info = &rx_ring->buffer_info[i];
4220
4221         while (rx_desc->status & E1000_RXD_STAT_DD) {
4222                 struct sk_buff *skb;
4223                 u8 status;
4224
4225 #ifdef CONFIG_E1000_NAPI
4226                 if (*work_done >= work_to_do)
4227                         break;
4228                 (*work_done)++;
4229 #endif
4230                 status = rx_desc->status;
4231                 skb = buffer_info->skb;
4232                 buffer_info->skb = NULL;
4233
4234                 prefetch(skb->data - NET_IP_ALIGN);
4235
4236                 if (++i == rx_ring->count) i = 0;
4237                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4238                 prefetch(next_rxd);
4239
4240                 next_buffer = &rx_ring->buffer_info[i];
4241
4242                 cleaned = TRUE;
4243                 cleaned_count++;
4244                 pci_unmap_single(pdev,
4245                                  buffer_info->dma,
4246                                  buffer_info->length,
4247                                  PCI_DMA_FROMDEVICE);
4248
4249                 length = le16_to_cpu(rx_desc->length);
4250
4251                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4252                         /* All receives must fit into a single buffer */
4253                         E1000_DBG("%s: Receive packet consumed multiple"
4254                                   " buffers\n", netdev->name);
4255                         /* recycle */
4256                         buffer_info->skb = skb;
4257                         goto next_desc;
4258                 }
4259
4260                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4261                         last_byte = *(skb->data + length - 1);
4262                         if (TBI_ACCEPT(&adapter->hw, status,
4263                                       rx_desc->errors, length, last_byte)) {
4264                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4265                                 e1000_tbi_adjust_stats(&adapter->hw,
4266                                                        &adapter->stats,
4267                                                        length, skb->data);
4268                                 spin_unlock_irqrestore(&adapter->stats_lock,
4269                                                        flags);
4270                                 length--;
4271                         } else {
4272                                 /* recycle */
4273                                 buffer_info->skb = skb;
4274                                 goto next_desc;
4275                         }
4276                 }
4277
4278                 /* adjust length to remove Ethernet CRC, this must be
4279                  * done after the TBI_ACCEPT workaround above */
4280                 length -= 4;
4281
4282                 /* probably a little skewed due to removing CRC */
4283                 total_rx_bytes += length;
4284                 total_rx_packets++;
4285
4286                 /* code added for copybreak, this should improve
4287                  * performance for small packets with large amounts
4288                  * of reassembly being done in the stack */
4289                 if (length < copybreak) {
4290                         struct sk_buff *new_skb =
4291                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4292                         if (new_skb) {
4293                                 skb_reserve(new_skb, NET_IP_ALIGN);
4294                                 skb_copy_to_linear_data_offset(new_skb,
4295                                                                -NET_IP_ALIGN,
4296                                                                (skb->data -
4297                                                                 NET_IP_ALIGN),
4298                                                                (length +
4299                                                                 NET_IP_ALIGN));
4300                                 /* save the skb in buffer_info as good */
4301                                 buffer_info->skb = skb;
4302                                 skb = new_skb;
4303                         }
4304                         /* else just continue with the old one */
4305                 }
4306                 /* end copybreak code */
4307                 skb_put(skb, length);
4308
4309                 /* Receive Checksum Offload */
4310                 e1000_rx_checksum(adapter,
4311                                   (uint32_t)(status) |
4312                                   ((uint32_t)(rx_desc->errors) << 24),
4313                                   le16_to_cpu(rx_desc->csum), skb);
4314
4315                 skb->protocol = eth_type_trans(skb, netdev);
4316 #ifdef CONFIG_E1000_NAPI
4317                 if (unlikely(adapter->vlgrp &&
4318                             (status & E1000_RXD_STAT_VP))) {
4319                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4320                                                  le16_to_cpu(rx_desc->special) &
4321                                                  E1000_RXD_SPC_VLAN_MASK);
4322                 } else {
4323                         netif_receive_skb(skb);
4324                 }
4325 #else /* CONFIG_E1000_NAPI */
4326                 if (unlikely(adapter->vlgrp &&
4327                             (status & E1000_RXD_STAT_VP))) {
4328                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4329                                         le16_to_cpu(rx_desc->special) &
4330                                         E1000_RXD_SPC_VLAN_MASK);
4331                 } else {
4332                         netif_rx(skb);
4333                 }
4334 #endif /* CONFIG_E1000_NAPI */
4335                 netdev->last_rx = jiffies;
4336
4337 next_desc:
4338                 rx_desc->status = 0;
4339
4340                 /* return some buffers to hardware, one at a time is too slow */
4341                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4342                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4343                         cleaned_count = 0;
4344                 }
4345
4346                 /* use prefetched values */
4347                 rx_desc = next_rxd;
4348                 buffer_info = next_buffer;
4349         }
4350         rx_ring->next_to_clean = i;
4351
4352         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4353         if (cleaned_count)
4354                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4355
4356         adapter->total_rx_packets += total_rx_packets;
4357         adapter->total_rx_bytes += total_rx_bytes;
4358         adapter->net_stats.rx_bytes += total_rx_bytes;
4359         adapter->net_stats.rx_packets += total_rx_packets;
4360         return cleaned;
4361 }
4362
4363 /**
4364  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4365  * @adapter: board private structure
4366  **/
4367
4368 static boolean_t
4369 #ifdef CONFIG_E1000_NAPI
4370 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4371                       struct e1000_rx_ring *rx_ring,
4372                       int *work_done, int work_to_do)
4373 #else
4374 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4375                       struct e1000_rx_ring *rx_ring)
4376 #endif
4377 {
4378         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4379         struct net_device *netdev = adapter->netdev;
4380         struct pci_dev *pdev = adapter->pdev;
4381         struct e1000_buffer *buffer_info, *next_buffer;
4382         struct e1000_ps_page *ps_page;
4383         struct e1000_ps_page_dma *ps_page_dma;
4384         struct sk_buff *skb;
4385         unsigned int i, j;
4386         uint32_t length, staterr;
4387         int cleaned_count = 0;
4388         boolean_t cleaned = FALSE;
4389         unsigned int total_rx_bytes=0, total_rx_packets=0;
4390
4391         i = rx_ring->next_to_clean;
4392         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4393         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4394         buffer_info = &rx_ring->buffer_info[i];
4395
4396         while (staterr & E1000_RXD_STAT_DD) {
4397                 ps_page = &rx_ring->ps_page[i];
4398                 ps_page_dma = &rx_ring->ps_page_dma[i];
4399 #ifdef CONFIG_E1000_NAPI
4400                 if (unlikely(*work_done >= work_to_do))
4401                         break;
4402                 (*work_done)++;
4403 #endif
4404                 skb = buffer_info->skb;
4405
4406                 /* in the packet split case this is header only */
4407                 prefetch(skb->data - NET_IP_ALIGN);
4408
4409                 if (++i == rx_ring->count) i = 0;
4410                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4411                 prefetch(next_rxd);
4412
4413                 next_buffer = &rx_ring->buffer_info[i];
4414
4415                 cleaned = TRUE;
4416                 cleaned_count++;
4417                 pci_unmap_single(pdev, buffer_info->dma,
4418                                  buffer_info->length,
4419                                  PCI_DMA_FROMDEVICE);
4420
4421                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4422                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4423                                   " the full packet\n", netdev->name);
4424                         dev_kfree_skb_irq(skb);
4425                         goto next_desc;
4426                 }
4427
4428                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4429                         dev_kfree_skb_irq(skb);
4430                         goto next_desc;
4431                 }
4432
4433                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4434
4435                 if (unlikely(!length)) {
4436                         E1000_DBG("%s: Last part of the packet spanning"
4437                                   " multiple descriptors\n", netdev->name);
4438                         dev_kfree_skb_irq(skb);
4439                         goto next_desc;
4440                 }
4441
4442                 /* Good Receive */
4443                 skb_put(skb, length);
4444
4445                 {
4446                 /* this looks ugly, but it seems compiler issues make it
4447                    more efficient than reusing j */
4448                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4449
4450                 /* page alloc/put takes too long and effects small packet
4451                  * throughput, so unsplit small packets and save the alloc/put*/
4452                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4453                         u8 *vaddr;
4454                         /* there is no documentation about how to call
4455                          * kmap_atomic, so we can't hold the mapping
4456                          * very long */
4457                         pci_dma_sync_single_for_cpu(pdev,
4458                                 ps_page_dma->ps_page_dma[0],
4459                                 PAGE_SIZE,
4460                                 PCI_DMA_FROMDEVICE);
4461                         vaddr = kmap_atomic(ps_page->ps_page[0],
4462                                             KM_SKB_DATA_SOFTIRQ);
4463                         memcpy(skb_tail_pointer(skb), vaddr, l1);
4464                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4465                         pci_dma_sync_single_for_device(pdev,
4466                                 ps_page_dma->ps_page_dma[0],
4467                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4468                         /* remove the CRC */
4469                         l1 -= 4;
4470                         skb_put(skb, l1);
4471                         goto copydone;
4472                 } /* if */
4473                 }
4474
4475                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4476                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4477                                 break;
4478                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4479                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4480                         ps_page_dma->ps_page_dma[j] = 0;
4481                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4482                                            length);
4483                         ps_page->ps_page[j] = NULL;
4484                         skb->len += length;
4485                         skb->data_len += length;
4486                         skb->truesize += length;
4487                 }
4488
4489                 /* strip the ethernet crc, problem is we're using pages now so
4490                  * this whole operation can get a little cpu intensive */
4491                 pskb_trim(skb, skb->len - 4);
4492
4493 copydone:
4494                 total_rx_bytes += skb->len;
4495                 total_rx_packets++;
4496
4497                 e1000_rx_checksum(adapter, staterr,
4498                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4499                 skb->protocol = eth_type_trans(skb, netdev);
4500
4501                 if (likely(rx_desc->wb.upper.header_status &
4502                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4503                         adapter->rx_hdr_split++;
4504 #ifdef CONFIG_E1000_NAPI
4505                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4506                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4507                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4508                                 E1000_RXD_SPC_VLAN_MASK);
4509                 } else {
4510                         netif_receive_skb(skb);
4511                 }
4512 #else /* CONFIG_E1000_NAPI */
4513                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4514                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4515                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4516                                 E1000_RXD_SPC_VLAN_MASK);
4517                 } else {
4518                         netif_rx(skb);
4519                 }
4520 #endif /* CONFIG_E1000_NAPI */
4521                 netdev->last_rx = jiffies;
4522
4523 next_desc:
4524                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4525                 buffer_info->skb = NULL;
4526
4527                 /* return some buffers to hardware, one at a time is too slow */
4528                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4529                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4530                         cleaned_count = 0;
4531                 }
4532
4533                 /* use prefetched values */
4534                 rx_desc = next_rxd;
4535                 buffer_info = next_buffer;
4536
4537                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4538         }
4539         rx_ring->next_to_clean = i;
4540
4541         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4542         if (cleaned_count)
4543                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4544
4545         adapter->total_rx_packets += total_rx_packets;
4546         adapter->total_rx_bytes += total_rx_bytes;
4547         adapter->net_stats.rx_bytes += total_rx_bytes;
4548         adapter->net_stats.rx_packets += total_rx_packets;
4549         return cleaned;
4550 }
4551
4552 /**
4553  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4554  * @adapter: address of board private structure
4555  **/
4556
4557 static void
4558 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4559                        struct e1000_rx_ring *rx_ring,
4560                        int cleaned_count)
4561 {
4562         struct net_device *netdev = adapter->netdev;
4563         struct pci_dev *pdev = adapter->pdev;
4564         struct e1000_rx_desc *rx_desc;
4565         struct e1000_buffer *buffer_info;
4566         struct sk_buff *skb;
4567         unsigned int i;
4568         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4569
4570         i = rx_ring->next_to_use;
4571         buffer_info = &rx_ring->buffer_info[i];
4572
4573         while (cleaned_count--) {
4574                 skb = buffer_info->skb;
4575                 if (skb) {
4576                         skb_trim(skb, 0);
4577                         goto map_skb;
4578                 }
4579
4580                 skb = netdev_alloc_skb(netdev, bufsz);
4581                 if (unlikely(!skb)) {
4582                         /* Better luck next round */
4583                         adapter->alloc_rx_buff_failed++;
4584                         break;
4585                 }
4586
4587                 /* Fix for errata 23, can't cross 64kB boundary */
4588                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4589                         struct sk_buff *oldskb = skb;
4590                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4591                                              "at %p\n", bufsz, skb->data);
4592                         /* Try again, without freeing the previous */
4593                         skb = netdev_alloc_skb(netdev, bufsz);
4594                         /* Failed allocation, critical failure */
4595                         if (!skb) {
4596                                 dev_kfree_skb(oldskb);
4597                                 break;
4598                         }
4599
4600                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4601                                 /* give up */
4602                                 dev_kfree_skb(skb);
4603                                 dev_kfree_skb(oldskb);
4604                                 break; /* while !buffer_info->skb */
4605                         }
4606
4607                         /* Use new allocation */
4608                         dev_kfree_skb(oldskb);
4609                 }
4610                 /* Make buffer alignment 2 beyond a 16 byte boundary
4611                  * this will result in a 16 byte aligned IP header after
4612                  * the 14 byte MAC header is removed
4613                  */
4614                 skb_reserve(skb, NET_IP_ALIGN);
4615
4616                 buffer_info->skb = skb;
4617                 buffer_info->length = adapter->rx_buffer_len;
4618 map_skb:
4619                 buffer_info->dma = pci_map_single(pdev,
4620                                                   skb->data,
4621                                                   adapter->rx_buffer_len,
4622                                                   PCI_DMA_FROMDEVICE);
4623
4624                 /* Fix for errata 23, can't cross 64kB boundary */
4625                 if (!e1000_check_64k_bound(adapter,
4626                                         (void *)(unsigned long)buffer_info->dma,
4627                                         adapter->rx_buffer_len)) {
4628                         DPRINTK(RX_ERR, ERR,
4629                                 "dma align check failed: %u bytes at %p\n",
4630                                 adapter->rx_buffer_len,
4631                                 (void *)(unsigned long)buffer_info->dma);
4632                         dev_kfree_skb(skb);
4633                         buffer_info->skb = NULL;
4634
4635                         pci_unmap_single(pdev, buffer_info->dma,
4636                                          adapter->rx_buffer_len,
4637                                          PCI_DMA_FROMDEVICE);
4638
4639                         break; /* while !buffer_info->skb */
4640                 }
4641                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4642                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4643
4644                 if (unlikely(++i == rx_ring->count))
4645                         i = 0;
4646                 buffer_info = &rx_ring->buffer_info[i];
4647         }
4648
4649         if (likely(rx_ring->next_to_use != i)) {
4650                 rx_ring->next_to_use = i;
4651                 if (unlikely(i-- == 0))
4652                         i = (rx_ring->count - 1);
4653
4654                 /* Force memory writes to complete before letting h/w
4655                  * know there are new descriptors to fetch.  (Only
4656                  * applicable for weak-ordered memory model archs,
4657                  * such as IA-64). */
4658                 wmb();
4659                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4660         }
4661 }
4662
4663 /**
4664  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4665  * @adapter: address of board private structure
4666  **/
4667
4668 static void
4669 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4670                           struct e1000_rx_ring *rx_ring,
4671                           int cleaned_count)
4672 {
4673         struct net_device *netdev = adapter->netdev;
4674         struct pci_dev *pdev = adapter->pdev;
4675         union e1000_rx_desc_packet_split *rx_desc;
4676         struct e1000_buffer *buffer_info;
4677         struct e1000_ps_page *ps_page;
4678         struct e1000_ps_page_dma *ps_page_dma;
4679         struct sk_buff *skb;
4680         unsigned int i, j;
4681
4682         i = rx_ring->next_to_use;
4683         buffer_info = &rx_ring->buffer_info[i];
4684         ps_page = &rx_ring->ps_page[i];
4685         ps_page_dma = &rx_ring->ps_page_dma[i];
4686
4687         while (cleaned_count--) {
4688                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4689
4690                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4691                         if (j < adapter->rx_ps_pages) {
4692                                 if (likely(!ps_page->ps_page[j])) {
4693                                         ps_page->ps_page[j] =
4694                                                 alloc_page(GFP_ATOMIC);
4695                                         if (unlikely(!ps_page->ps_page[j])) {
4696                                                 adapter->alloc_rx_buff_failed++;
4697                                                 goto no_buffers;
4698                                         }
4699                                         ps_page_dma->ps_page_dma[j] =
4700                                                 pci_map_page(pdev,
4701                                                             ps_page->ps_page[j],
4702                                                             0, PAGE_SIZE,
4703                                                             PCI_DMA_FROMDEVICE);
4704                                 }
4705                                 /* Refresh the desc even if buffer_addrs didn't
4706                                  * change because each write-back erases
4707                                  * this info.
4708                                  */
4709                                 rx_desc->read.buffer_addr[j+1] =
4710                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4711                         } else
4712                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4713                 }
4714
4715                 skb = netdev_alloc_skb(netdev,
4716                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4717
4718                 if (unlikely(!skb)) {
4719                         adapter->alloc_rx_buff_failed++;
4720                         break;
4721                 }
4722
4723                 /* Make buffer alignment 2 beyond a 16 byte boundary
4724                  * this will result in a 16 byte aligned IP header after
4725                  * the 14 byte MAC header is removed
4726                  */
4727                 skb_reserve(skb, NET_IP_ALIGN);
4728
4729                 buffer_info->skb = skb;
4730                 buffer_info->length = adapter->rx_ps_bsize0;
4731                 buffer_info->dma = pci_map_single(pdev, skb->data,
4732                                                   adapter->rx_ps_bsize0,
4733                                                   PCI_DMA_FROMDEVICE);
4734
4735                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4736
4737                 if (unlikely(++i == rx_ring->count)) i = 0;
4738                 buffer_info = &rx_ring->buffer_info[i];
4739                 ps_page = &rx_ring->ps_page[i];
4740                 ps_page_dma = &rx_ring->ps_page_dma[i];
4741         }
4742
4743 no_buffers:
4744         if (likely(rx_ring->next_to_use != i)) {
4745                 rx_ring->next_to_use = i;
4746                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4747
4748                 /* Force memory writes to complete before letting h/w
4749                  * know there are new descriptors to fetch.  (Only
4750                  * applicable for weak-ordered memory model archs,
4751                  * such as IA-64). */
4752                 wmb();
4753                 /* Hardware increments by 16 bytes, but packet split
4754                  * descriptors are 32 bytes...so we increment tail
4755                  * twice as much.
4756                  */
4757                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4758         }
4759 }
4760
4761 /**
4762  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4763  * @adapter:
4764  **/
4765
4766 static void
4767 e1000_smartspeed(struct e1000_adapter *adapter)
4768 {
4769         uint16_t phy_status;
4770         uint16_t phy_ctrl;
4771
4772         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4773            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4774                 return;
4775
4776         if (adapter->smartspeed == 0) {
4777                 /* If Master/Slave config fault is asserted twice,
4778                  * we assume back-to-back */
4779                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4780                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4781                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4782                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4783                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4784                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4785                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4786                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4787                                             phy_ctrl);
4788                         adapter->smartspeed++;
4789                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4790                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4791                                                &phy_ctrl)) {
4792                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4793                                              MII_CR_RESTART_AUTO_NEG);
4794                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4795                                                     phy_ctrl);
4796                         }
4797                 }
4798                 return;
4799         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4800                 /* If still no link, perhaps using 2/3 pair cable */
4801                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4802                 phy_ctrl |= CR_1000T_MS_ENABLE;
4803                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4804                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4805                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4806                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4807                                      MII_CR_RESTART_AUTO_NEG);
4808                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4809                 }
4810         }
4811         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4812         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4813                 adapter->smartspeed = 0;
4814 }
4815
4816 /**
4817  * e1000_ioctl -
4818  * @netdev:
4819  * @ifreq:
4820  * @cmd:
4821  **/
4822
4823 static int
4824 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4825 {
4826         switch (cmd) {
4827         case SIOCGMIIPHY:
4828         case SIOCGMIIREG:
4829         case SIOCSMIIREG:
4830                 return e1000_mii_ioctl(netdev, ifr, cmd);
4831         default:
4832                 return -EOPNOTSUPP;
4833         }
4834 }
4835
4836 /**
4837  * e1000_mii_ioctl -
4838  * @netdev:
4839  * @ifreq:
4840  * @cmd:
4841  **/
4842
4843 static int
4844 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4845 {
4846         struct e1000_adapter *adapter = netdev_priv(netdev);
4847         struct mii_ioctl_data *data = if_mii(ifr);
4848         int retval;
4849         uint16_t mii_reg;
4850         uint16_t spddplx;
4851         unsigned long flags;
4852
4853         if (adapter->hw.media_type != e1000_media_type_copper)
4854                 return -EOPNOTSUPP;
4855
4856         switch (cmd) {
4857         case SIOCGMIIPHY:
4858                 data->phy_id = adapter->hw.phy_addr;
4859                 break;
4860         case SIOCGMIIREG:
4861                 if (!capable(CAP_NET_ADMIN))
4862                         return -EPERM;
4863                 spin_lock_irqsave(&adapter->stats_lock, flags);
4864                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4865                                    &data->val_out)) {
4866                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4867                         return -EIO;
4868                 }
4869                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4870                 break;
4871         case SIOCSMIIREG:
4872                 if (!capable(CAP_NET_ADMIN))
4873                         return -EPERM;
4874                 if (data->reg_num & ~(0x1F))
4875                         return -EFAULT;
4876                 mii_reg = data->val_in;
4877                 spin_lock_irqsave(&adapter->stats_lock, flags);
4878                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4879                                         mii_reg)) {
4880                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4881                         return -EIO;
4882                 }
4883                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4884                 if (adapter->hw.media_type == e1000_media_type_copper) {
4885                         switch (data->reg_num) {
4886                         case PHY_CTRL:
4887                                 if (mii_reg & MII_CR_POWER_DOWN)
4888                                         break;
4889                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4890                                         adapter->hw.autoneg = 1;
4891                                         adapter->hw.autoneg_advertised = 0x2F;
4892                                 } else {
4893                                         if (mii_reg & 0x40)
4894                                                 spddplx = SPEED_1000;
4895                                         else if (mii_reg & 0x2000)
4896                                                 spddplx = SPEED_100;
4897                                         else
4898                                                 spddplx = SPEED_10;
4899                                         spddplx += (mii_reg & 0x100)
4900                                                    ? DUPLEX_FULL :
4901                                                    DUPLEX_HALF;
4902                                         retval = e1000_set_spd_dplx(adapter,
4903                                                                     spddplx);
4904                                         if (retval)
4905                                                 return retval;
4906                                 }
4907                                 if (netif_running(adapter->netdev))
4908                                         e1000_reinit_locked(adapter);
4909                                 else
4910                                         e1000_reset(adapter);
4911                                 break;
4912                         case M88E1000_PHY_SPEC_CTRL:
4913                         case M88E1000_EXT_PHY_SPEC_CTRL:
4914                                 if (e1000_phy_reset(&adapter->hw))
4915                                         return -EIO;
4916                                 break;
4917                         }
4918                 } else {
4919                         switch (data->reg_num) {
4920                         case PHY_CTRL:
4921                                 if (mii_reg & MII_CR_POWER_DOWN)
4922                                         break;
4923                                 if (netif_running(adapter->netdev))
4924                                         e1000_reinit_locked(adapter);
4925                                 else
4926                                         e1000_reset(adapter);
4927                                 break;
4928                         }
4929                 }
4930                 break;
4931         default:
4932                 return -EOPNOTSUPP;
4933         }
4934         return E1000_SUCCESS;
4935 }
4936
4937 void
4938 e1000_pci_set_mwi(struct e1000_hw *hw)
4939 {
4940         struct e1000_adapter *adapter = hw->back;
4941         int ret_val = pci_set_mwi(adapter->pdev);
4942
4943         if (ret_val)
4944                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4945 }
4946
4947 void
4948 e1000_pci_clear_mwi(struct e1000_hw *hw)
4949 {
4950         struct e1000_adapter *adapter = hw->back;
4951
4952         pci_clear_mwi(adapter->pdev);
4953 }
4954
4955 int
4956 e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4957 {
4958         struct e1000_adapter *adapter = hw->back;
4959         return pcix_get_mmrbc(adapter->pdev);
4960 }
4961
4962 void
4963 e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4964 {
4965         struct e1000_adapter *adapter = hw->back;
4966         pcix_set_mmrbc(adapter->pdev, mmrbc);
4967 }
4968
4969 int32_t
4970 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4971 {
4972     struct e1000_adapter *adapter = hw->back;
4973     uint16_t cap_offset;
4974
4975     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4976     if (!cap_offset)
4977         return -E1000_ERR_CONFIG;
4978
4979     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4980
4981     return E1000_SUCCESS;
4982 }
4983
4984 void
4985 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4986 {
4987         outl(value, port);
4988 }
4989
4990 static void
4991 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4992 {
4993         struct e1000_adapter *adapter = netdev_priv(netdev);
4994         uint32_t ctrl, rctl;
4995
4996         e1000_irq_disable(adapter);
4997         adapter->vlgrp = grp;
4998
4999         if (grp) {
5000                 /* enable VLAN tag insert/strip */
5001                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5002                 ctrl |= E1000_CTRL_VME;
5003                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5004
5005                 if (adapter->hw.mac_type != e1000_ich8lan) {
5006                         /* enable VLAN receive filtering */
5007                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5008                         rctl |= E1000_RCTL_VFE;
5009                         rctl &= ~E1000_RCTL_CFIEN;
5010                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5011                         e1000_update_mng_vlan(adapter);
5012                 }
5013         } else {
5014                 /* disable VLAN tag insert/strip */
5015                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5016                 ctrl &= ~E1000_CTRL_VME;
5017                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5018
5019                 if (adapter->hw.mac_type != e1000_ich8lan) {
5020                         /* disable VLAN filtering */
5021                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5022                         rctl &= ~E1000_RCTL_VFE;
5023                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5024                         if (adapter->mng_vlan_id !=
5025                             (uint16_t)E1000_MNG_VLAN_NONE) {
5026                                 e1000_vlan_rx_kill_vid(netdev,
5027                                                        adapter->mng_vlan_id);
5028                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
5029                         }
5030                 }
5031         }
5032
5033         e1000_irq_enable(adapter);
5034 }
5035
5036 static void
5037 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
5038 {
5039         struct e1000_adapter *adapter = netdev_priv(netdev);
5040         uint32_t vfta, index;
5041
5042         if ((adapter->hw.mng_cookie.status &
5043              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5044             (vid == adapter->mng_vlan_id))
5045                 return;
5046         /* add VID to filter table */
5047         index = (vid >> 5) & 0x7F;
5048         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5049         vfta |= (1 << (vid & 0x1F));
5050         e1000_write_vfta(&adapter->hw, index, vfta);
5051 }
5052
5053 static void
5054 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
5055 {
5056         struct e1000_adapter *adapter = netdev_priv(netdev);
5057         uint32_t vfta, index;
5058
5059         e1000_irq_disable(adapter);
5060         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5061         e1000_irq_enable(adapter);
5062
5063         if ((adapter->hw.mng_cookie.status &
5064              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5065             (vid == adapter->mng_vlan_id)) {
5066                 /* release control to f/w */
5067                 e1000_release_hw_control(adapter);
5068                 return;
5069         }
5070
5071         /* remove VID from filter table */
5072         index = (vid >> 5) & 0x7F;
5073         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5074         vfta &= ~(1 << (vid & 0x1F));
5075         e1000_write_vfta(&adapter->hw, index, vfta);
5076 }
5077
5078 static void
5079 e1000_restore_vlan(struct e1000_adapter *adapter)
5080 {
5081         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5082
5083         if (adapter->vlgrp) {
5084                 uint16_t vid;
5085                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5086                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5087                                 continue;
5088                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5089                 }
5090         }
5091 }
5092
5093 int
5094 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5095 {
5096         adapter->hw.autoneg = 0;
5097
5098         /* Fiber NICs only allow 1000 gbps Full duplex */
5099         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5100                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5101                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5102                 return -EINVAL;
5103         }
5104
5105         switch (spddplx) {
5106         case SPEED_10 + DUPLEX_HALF:
5107                 adapter->hw.forced_speed_duplex = e1000_10_half;
5108                 break;
5109         case SPEED_10 + DUPLEX_FULL:
5110                 adapter->hw.forced_speed_duplex = e1000_10_full;
5111                 break;
5112         case SPEED_100 + DUPLEX_HALF:
5113                 adapter->hw.forced_speed_duplex = e1000_100_half;
5114                 break;
5115         case SPEED_100 + DUPLEX_FULL:
5116                 adapter->hw.forced_speed_duplex = e1000_100_full;
5117                 break;
5118         case SPEED_1000 + DUPLEX_FULL:
5119                 adapter->hw.autoneg = 1;
5120                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5121                 break;
5122         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5123         default:
5124                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5125                 return -EINVAL;
5126         }
5127         return 0;
5128 }
5129
5130 static int
5131 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5132 {
5133         struct net_device *netdev = pci_get_drvdata(pdev);
5134         struct e1000_adapter *adapter = netdev_priv(netdev);
5135         uint32_t ctrl, ctrl_ext, rctl, status;
5136         uint32_t wufc = adapter->wol;
5137 #ifdef CONFIG_PM
5138         int retval = 0;
5139 #endif
5140
5141         netif_device_detach(netdev);
5142
5143         if (netif_running(netdev)) {
5144                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5145                 e1000_down(adapter);
5146         }
5147
5148 #ifdef CONFIG_PM
5149         retval = pci_save_state(pdev);
5150         if (retval)
5151                 return retval;
5152 #endif
5153
5154         status = E1000_READ_REG(&adapter->hw, STATUS);
5155         if (status & E1000_STATUS_LU)
5156                 wufc &= ~E1000_WUFC_LNKC;
5157
5158         if (wufc) {
5159                 e1000_setup_rctl(adapter);
5160                 e1000_set_rx_mode(netdev);
5161
5162                 /* turn on all-multi mode if wake on multicast is enabled */
5163                 if (wufc & E1000_WUFC_MC) {
5164                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5165                         rctl |= E1000_RCTL_MPE;
5166                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5167                 }
5168
5169                 if (adapter->hw.mac_type >= e1000_82540) {
5170                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5171                         /* advertise wake from D3Cold */
5172                         #define E1000_CTRL_ADVD3WUC 0x00100000
5173                         /* phy power management enable */
5174                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5175                         ctrl |= E1000_CTRL_ADVD3WUC |
5176                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5177                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5178                 }
5179
5180                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5181                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5182                         /* keep the laser running in D3 */
5183                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5184                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5185                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5186                 }
5187
5188                 /* Allow time for pending master requests to run */
5189                 e1000_disable_pciex_master(&adapter->hw);
5190
5191                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5192                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5193                 pci_enable_wake(pdev, PCI_D3hot, 1);
5194                 pci_enable_wake(pdev, PCI_D3cold, 1);
5195         } else {
5196                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5197                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5198                 pci_enable_wake(pdev, PCI_D3hot, 0);
5199                 pci_enable_wake(pdev, PCI_D3cold, 0);
5200         }
5201
5202         e1000_release_manageability(adapter);
5203
5204         /* make sure adapter isn't asleep if manageability is enabled */
5205         if (adapter->en_mng_pt) {
5206                 pci_enable_wake(pdev, PCI_D3hot, 1);
5207                 pci_enable_wake(pdev, PCI_D3cold, 1);
5208         }
5209
5210         if (adapter->hw.phy_type == e1000_phy_igp_3)
5211                 e1000_phy_powerdown_workaround(&adapter->hw);
5212
5213         if (netif_running(netdev))
5214                 e1000_free_irq(adapter);
5215
5216         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5217          * would have already happened in close and is redundant. */
5218         e1000_release_hw_control(adapter);
5219
5220         pci_disable_device(pdev);
5221
5222         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5223
5224         return 0;
5225 }
5226
5227 #ifdef CONFIG_PM
5228 static int
5229 e1000_resume(struct pci_dev *pdev)
5230 {
5231         struct net_device *netdev = pci_get_drvdata(pdev);
5232         struct e1000_adapter *adapter = netdev_priv(netdev);
5233         uint32_t err;
5234
5235         pci_set_power_state(pdev, PCI_D0);
5236         pci_restore_state(pdev);
5237         if ((err = pci_enable_device(pdev))) {
5238                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5239                 return err;
5240         }
5241         pci_set_master(pdev);
5242
5243         pci_enable_wake(pdev, PCI_D3hot, 0);
5244         pci_enable_wake(pdev, PCI_D3cold, 0);
5245
5246         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5247                 return err;
5248
5249         e1000_power_up_phy(adapter);
5250         e1000_reset(adapter);
5251         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5252
5253         e1000_init_manageability(adapter);
5254
5255         if (netif_running(netdev))
5256                 e1000_up(adapter);
5257
5258         netif_device_attach(netdev);
5259
5260         /* If the controller is 82573 and f/w is AMT, do not set
5261          * DRV_LOAD until the interface is up.  For all other cases,
5262          * let the f/w know that the h/w is now under the control
5263          * of the driver. */
5264         if (adapter->hw.mac_type != e1000_82573 ||
5265             !e1000_check_mng_mode(&adapter->hw))
5266                 e1000_get_hw_control(adapter);
5267
5268         return 0;
5269 }
5270 #endif
5271
5272 static void e1000_shutdown(struct pci_dev *pdev)
5273 {
5274         e1000_suspend(pdev, PMSG_SUSPEND);
5275 }
5276
5277 #ifdef CONFIG_NET_POLL_CONTROLLER
5278 /*
5279  * Polling 'interrupt' - used by things like netconsole to send skbs
5280  * without having to re-enable interrupts. It's not called while
5281  * the interrupt routine is executing.
5282  */
5283 static void
5284 e1000_netpoll(struct net_device *netdev)
5285 {
5286         struct e1000_adapter *adapter = netdev_priv(netdev);
5287
5288         disable_irq(adapter->pdev->irq);
5289         e1000_intr(adapter->pdev->irq, netdev);
5290         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5291 #ifndef CONFIG_E1000_NAPI
5292         adapter->clean_rx(adapter, adapter->rx_ring);
5293 #endif
5294         enable_irq(adapter->pdev->irq);
5295 }
5296 #endif
5297
5298 /**
5299  * e1000_io_error_detected - called when PCI error is detected
5300  * @pdev: Pointer to PCI device
5301  * @state: The current pci conneection state
5302  *
5303  * This function is called after a PCI bus error affecting
5304  * this device has been detected.
5305  */
5306 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5307 {
5308         struct net_device *netdev = pci_get_drvdata(pdev);
5309         struct e1000_adapter *adapter = netdev->priv;
5310
5311         netif_device_detach(netdev);
5312
5313         if (netif_running(netdev))
5314                 e1000_down(adapter);
5315         pci_disable_device(pdev);
5316
5317         /* Request a slot slot reset. */
5318         return PCI_ERS_RESULT_NEED_RESET;
5319 }
5320
5321 /**
5322  * e1000_io_slot_reset - called after the pci bus has been reset.
5323  * @pdev: Pointer to PCI device
5324  *
5325  * Restart the card from scratch, as if from a cold-boot. Implementation
5326  * resembles the first-half of the e1000_resume routine.
5327  */
5328 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5329 {
5330         struct net_device *netdev = pci_get_drvdata(pdev);
5331         struct e1000_adapter *adapter = netdev->priv;
5332
5333         if (pci_enable_device(pdev)) {
5334                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5335                 return PCI_ERS_RESULT_DISCONNECT;
5336         }
5337         pci_set_master(pdev);
5338
5339         pci_enable_wake(pdev, PCI_D3hot, 0);
5340         pci_enable_wake(pdev, PCI_D3cold, 0);
5341
5342         e1000_reset(adapter);
5343         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5344
5345         return PCI_ERS_RESULT_RECOVERED;
5346 }
5347
5348 /**
5349  * e1000_io_resume - called when traffic can start flowing again.
5350  * @pdev: Pointer to PCI device
5351  *
5352  * This callback is called when the error recovery driver tells us that
5353  * its OK to resume normal operation. Implementation resembles the
5354  * second-half of the e1000_resume routine.
5355  */
5356 static void e1000_io_resume(struct pci_dev *pdev)
5357 {
5358         struct net_device *netdev = pci_get_drvdata(pdev);
5359         struct e1000_adapter *adapter = netdev->priv;
5360
5361         e1000_init_manageability(adapter);
5362
5363         if (netif_running(netdev)) {
5364                 if (e1000_up(adapter)) {
5365                         printk("e1000: can't bring device back up after reset\n");
5366                         return;
5367                 }
5368         }
5369
5370         netif_device_attach(netdev);
5371
5372         /* If the controller is 82573 and f/w is AMT, do not set
5373          * DRV_LOAD until the interface is up.  For all other cases,
5374          * let the f/w know that the h/w is now under the control
5375          * of the driver. */
5376         if (adapter->hw.mac_type != e1000_82573 ||
5377             !e1000_check_mng_mode(&adapter->hw))
5378                 e1000_get_hw_control(adapter);
5379
5380 }
5381
5382 /* e1000_main.c */