git.oblomov.eu Git - linux-2.6/blob - drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30 #include <net/ip6_checksum.h>
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #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 static struct pci_device_id e1000_pci_tbl[] = {
  51         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  52         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  53         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  54         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  55         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  56         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  57         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  58         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  59         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  63         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  64         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  65         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  70         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  71         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  72         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  77         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  78         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  79         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  81         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  82         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  83         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  84         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1099),
  86         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
  87         /* required last entry */
  88         {0,}
  89 };
  90
  91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
  92
  93 int e1000_up(struct e1000_adapter *adapter);
  94 void e1000_down(struct e1000_adapter *adapter);
  95 void e1000_reinit_locked(struct e1000_adapter *adapter);
  96 void e1000_reset(struct e1000_adapter *adapter);
  97 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
  98 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
  99 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 100 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 101 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 102 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 103                              struct e1000_tx_ring *txdr);
 104 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 105                              struct e1000_rx_ring *rxdr);
 106 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 107                              struct e1000_tx_ring *tx_ring);
 108 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 109                              struct e1000_rx_ring *rx_ring);
 110 void e1000_update_stats(struct e1000_adapter *adapter);
 111
 112 static int e1000_init_module(void);
 113 static void e1000_exit_module(void);
 114 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 115 static void __devexit e1000_remove(struct pci_dev *pdev);
 116 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 117 static int e1000_sw_init(struct e1000_adapter *adapter);
 118 static int e1000_open(struct net_device *netdev);
 119 static int e1000_close(struct net_device *netdev);
 120 static void e1000_configure_tx(struct e1000_adapter *adapter);
 121 static void e1000_configure_rx(struct e1000_adapter *adapter);
 122 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 123 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 124 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 125 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 126                                 struct e1000_tx_ring *tx_ring);
 127 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 128                                 struct e1000_rx_ring *rx_ring);
 129 static void e1000_set_rx_mode(struct net_device *netdev);
 130 static void e1000_update_phy_info(unsigned long data);
 131 static void e1000_watchdog(unsigned long data);
 132 static void e1000_82547_tx_fifo_stall(unsigned long data);
 133 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 136 static int e1000_set_mac(struct net_device *netdev, void *p);
 137 static irqreturn_t e1000_intr(int irq, void *data);
 138 static irqreturn_t e1000_intr_msi(int irq, void *data);
 139 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 140                                     struct e1000_tx_ring *tx_ring);
 141 #ifdef CONFIG_E1000_NAPI
 142 static int e1000_clean(struct napi_struct *napi, int budget);
 143 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 144                                     struct e1000_rx_ring *rx_ring,
 145                                     int *work_done, int work_to_do);
 146 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 147                                        struct e1000_rx_ring *rx_ring,
 148                                        int *work_done, int work_to_do);
 149 #else
 150 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 151                                     struct e1000_rx_ring *rx_ring);
 152 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 153                                        struct e1000_rx_ring *rx_ring);
 154 #endif
 155 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 156                                    struct e1000_rx_ring *rx_ring,
 157                                    int cleaned_count);
 158 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 159                                       struct e1000_rx_ring *rx_ring,
 160                                       int cleaned_count);
 161 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 162 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 163                            int cmd);
 164 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 165 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 166 static void e1000_tx_timeout(struct net_device *dev);
 167 static void e1000_reset_task(struct work_struct *work);
 168 static void e1000_smartspeed(struct e1000_adapter *adapter);
 169 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 170                                        struct sk_buff *skb);
 171
 172 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 173 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 174 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 175 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 176
 177 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 178 #ifdef CONFIG_PM
 179 static int e1000_resume(struct pci_dev *pdev);
 180 #endif
 181 static void e1000_shutdown(struct pci_dev *pdev);
 182
 183 #ifdef CONFIG_NET_POLL_CONTROLLER
 184 /* for netdump / net console */
 185 static void e1000_netpoll (struct net_device *netdev);
 186 #endif
 187
 188 #define COPYBREAK_DEFAULT 256
 189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
 190 module_param(copybreak, uint, 0644);
 191 MODULE_PARM_DESC(copybreak,
 192         "Maximum size of packet that is copied to a new buffer on receive");
 193
 194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 195                      pci_channel_state_t state);
 196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 197 static void e1000_io_resume(struct pci_dev *pdev);
 198
 199 static struct pci_error_handlers e1000_err_handler = {
 200         .error_detected = e1000_io_error_detected,
 201         .slot_reset = e1000_io_slot_reset,
 202         .resume = e1000_io_resume,
 203 };
 204
 205 static struct pci_driver e1000_driver = {
 206         .name     = e1000_driver_name,
 207         .id_table = e1000_pci_tbl,
 208         .probe    = e1000_probe,
 209         .remove   = __devexit_p(e1000_remove),
 210 #ifdef CONFIG_PM
 211         /* Power Managment Hooks */
 212         .suspend  = e1000_suspend,
 213         .resume   = e1000_resume,
 214 #endif
 215         .shutdown = e1000_shutdown,
 216         .err_handler = &e1000_err_handler
 217 };
 218
 219 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 220 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 221 MODULE_LICENSE("GPL");
 222 MODULE_VERSION(DRV_VERSION);
 223
 224 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 225 module_param(debug, int, 0);
 226 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 227
 228 /**
 229  * e1000_init_module - Driver Registration Routine
 230  *
 231  * e1000_init_module is the first routine called when the driver is
 232  * loaded. All it does is register with the PCI subsystem.
 233  **/
 234
 235 static int __init
 236 e1000_init_module(void)
 237 {
 238         int ret;
 239         printk(KERN_INFO "%s - version %s\n",
 240                e1000_driver_string, e1000_driver_version);
 241
 242         printk(KERN_INFO "%s\n", e1000_copyright);
 243
 244         ret = pci_register_driver(&e1000_driver);
 245         if (copybreak != COPYBREAK_DEFAULT) {
 246                 if (copybreak == 0)
 247                         printk(KERN_INFO "e1000: copybreak disabled\n");
 248                 else
 249                         printk(KERN_INFO "e1000: copybreak enabled for "
 250                                "packets <= %u bytes\n", copybreak);
 251         }
 252         return ret;
 253 }
 254
 255 module_init(e1000_init_module);
 256
 257 /**
 258  * e1000_exit_module - Driver Exit Cleanup Routine
 259  *
 260  * e1000_exit_module is called just before the driver is removed
 261  * from memory.
 262  **/
 263
 264 static void __exit
 265 e1000_exit_module(void)
 266 {
 267         pci_unregister_driver(&e1000_driver);
 268 }
 269
 270 module_exit(e1000_exit_module);
 271
 272 static int e1000_request_irq(struct e1000_adapter *adapter)
 273 {
 274         struct net_device *netdev = adapter->netdev;
 275         irq_handler_t handler = e1000_intr;
 276         int irq_flags = IRQF_SHARED;
 277         int err;
 278
 279         if (adapter->hw.mac_type >= e1000_82571) {
 280                 adapter->have_msi = !pci_enable_msi(adapter->pdev);
 281                 if (adapter->have_msi) {
 282                         handler = e1000_intr_msi;
 283                         irq_flags = 0;
 284                 }
 285         }
 286
 287         err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
 288                           netdev);
 289         if (err) {
 290                 if (adapter->have_msi)
 291                         pci_disable_msi(adapter->pdev);
 292                 DPRINTK(PROBE, ERR,
 293                         "Unable to allocate interrupt Error: %d\n", err);
 294         }
 295
 296         return err;
 297 }
 298
 299 static void e1000_free_irq(struct e1000_adapter *adapter)
 300 {
 301         struct net_device *netdev = adapter->netdev;
 302
 303         free_irq(adapter->pdev->irq, netdev);
 304
 305         if (adapter->have_msi)
 306                 pci_disable_msi(adapter->pdev);
 307 }
 308
 309 /**
 310  * e1000_irq_disable - Mask off interrupt generation on the NIC
 311  * @adapter: board private structure
 312  **/
 313
 314 static void
 315 e1000_irq_disable(struct e1000_adapter *adapter)
 316 {
 317         atomic_inc(&adapter->irq_sem);
 318         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 319         E1000_WRITE_FLUSH(&adapter->hw);
 320         synchronize_irq(adapter->pdev->irq);
 321 }
 322
 323 /**
 324  * e1000_irq_enable - Enable default interrupt generation settings
 325  * @adapter: board private structure
 326  **/
 327
 328 static void
 329 e1000_irq_enable(struct e1000_adapter *adapter)
 330 {
 331         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 332                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 333                 E1000_WRITE_FLUSH(&adapter->hw);
 334         }
 335 }
 336
 337 static void
 338 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 339 {
 340         struct net_device *netdev = adapter->netdev;
 341         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 342         uint16_t old_vid = adapter->mng_vlan_id;
 343         if (adapter->vlgrp) {
 344                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 345                         if (adapter->hw.mng_cookie.status &
 346                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 347                                 e1000_vlan_rx_add_vid(netdev, vid);
 348                                 adapter->mng_vlan_id = vid;
 349                         } else
 350                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 351
 352                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 353                                         (vid != old_vid) &&
 354                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 355                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 356                 } else
 357                         adapter->mng_vlan_id = vid;
 358         }
 359 }
 360
 361 /**
 362  * e1000_release_hw_control - release control of the h/w to f/w
 363  * @adapter: address of board private structure
 364  *
 365  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 366  * For ASF and Pass Through versions of f/w this means that the
 367  * driver is no longer loaded. For AMT version (only with 82573) i
 368  * of the f/w this means that the network i/f is closed.
 369  *
 370  **/
 371
 372 static void
 373 e1000_release_hw_control(struct e1000_adapter *adapter)
 374 {
 375         uint32_t ctrl_ext;
 376         uint32_t swsm;
 377
 378         /* Let firmware taken over control of h/w */
 379         switch (adapter->hw.mac_type) {
 380         case e1000_82573:
 381                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 382                 E1000_WRITE_REG(&adapter->hw, SWSM,
 383                                 swsm & ~E1000_SWSM_DRV_LOAD);
 384                 break;
 385         case e1000_82571:
 386         case e1000_82572:
 387         case e1000_80003es2lan:
 388         case e1000_ich8lan:
 389                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 390                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 391                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 392                 break;
 393         default:
 394                 break;
 395         }
 396 }
 397
 398 /**
 399  * e1000_get_hw_control - get control of the h/w from f/w
 400  * @adapter: address of board private structure
 401  *
 402  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 403  * For ASF and Pass Through versions of f/w this means that
 404  * the driver is loaded. For AMT version (only with 82573)
 405  * of the f/w this means that the network i/f is open.
 406  *
 407  **/
 408
 409 static void
 410 e1000_get_hw_control(struct e1000_adapter *adapter)
 411 {
 412         uint32_t ctrl_ext;
 413         uint32_t swsm;
 414
 415         /* Let firmware know the driver has taken over */
 416         switch (adapter->hw.mac_type) {
 417         case e1000_82573:
 418                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 419                 E1000_WRITE_REG(&adapter->hw, SWSM,
 420                                 swsm | E1000_SWSM_DRV_LOAD);
 421                 break;
 422         case e1000_82571:
 423         case e1000_82572:
 424         case e1000_80003es2lan:
 425         case e1000_ich8lan:
 426                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 427                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 428                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 429                 break;
 430         default:
 431                 break;
 432         }
 433 }
 434
 435 static void
 436 e1000_init_manageability(struct e1000_adapter *adapter)
 437 {
 438         if (adapter->en_mng_pt) {
 439                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 440
 441                 /* disable hardware interception of ARP */
 442                 manc &= ~(E1000_MANC_ARP_EN);
 443
 444                 /* enable receiving management packets to the host */
 445                 /* this will probably generate destination unreachable messages
 446                  * from the host OS, but the packets will be handled on SMBUS */
 447                 if (adapter->hw.has_manc2h) {
 448                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
 449
 450                         manc |= E1000_MANC_EN_MNG2HOST;
 451 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 452 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 453                         manc2h |= E1000_MNG2HOST_PORT_623;
 454                         manc2h |= E1000_MNG2HOST_PORT_664;
 455                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
 456                 }
 457
 458                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 459         }
 460 }
 461
 462 static void
 463 e1000_release_manageability(struct e1000_adapter *adapter)
 464 {
 465         if (adapter->en_mng_pt) {
 466                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 467
 468                 /* re-enable hardware interception of ARP */
 469                 manc |= E1000_MANC_ARP_EN;
 470
 471                 if (adapter->hw.has_manc2h)
 472                         manc &= ~E1000_MANC_EN_MNG2HOST;
 473
 474                 /* don't explicitly have to mess with MANC2H since
 475                  * MANC has an enable disable that gates MANC2H */
 476
 477                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 478         }
 479 }
 480
 481 /**
 482  * e1000_configure - configure the hardware for RX and TX
 483  * @adapter = private board structure
 484  **/
 485 static void e1000_configure(struct e1000_adapter *adapter)
 486 {
 487         struct net_device *netdev = adapter->netdev;
 488         int i;
 489
 490         e1000_set_rx_mode(netdev);
 491
 492         e1000_restore_vlan(adapter);
 493         e1000_init_manageability(adapter);
 494
 495         e1000_configure_tx(adapter);
 496         e1000_setup_rctl(adapter);
 497         e1000_configure_rx(adapter);
 498         /* call E1000_DESC_UNUSED which always leaves
 499          * at least 1 descriptor unused to make sure
 500          * next_to_use != next_to_clean */
 501         for (i = 0; i < adapter->num_rx_queues; i++) {
 502                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 503                 adapter->alloc_rx_buf(adapter, ring,
 504                                       E1000_DESC_UNUSED(ring));
 505         }
 506
 507         adapter->tx_queue_len = netdev->tx_queue_len;
 508 }
 509
 510 int e1000_up(struct e1000_adapter *adapter)
 511 {
 512         /* hardware has been reset, we need to reload some things */
 513         e1000_configure(adapter);
 514
 515         clear_bit(__E1000_DOWN, &adapter->flags);
 516
 517 #ifdef CONFIG_E1000_NAPI
 518         napi_enable(&adapter->napi);
 519 #endif
 520         e1000_irq_enable(adapter);
 521
 522         /* fire a link change interrupt to start the watchdog */
 523         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
 524         return 0;
 525 }
 526
 527 /**
 528  * e1000_power_up_phy - restore link in case the phy was powered down
 529  * @adapter: address of board private structure
 530  *
 531  * The phy may be powered down to save power and turn off link when the
 532  * driver is unloaded and wake on lan is not enabled (among others)
 533  * *** this routine MUST be followed by a call to e1000_reset ***
 534  *
 535  **/
 536
 537 void e1000_power_up_phy(struct e1000_adapter *adapter)
 538 {
 539         uint16_t mii_reg = 0;
 540
 541         /* Just clear the power down bit to wake the phy back up */
 542         if (adapter->hw.media_type == e1000_media_type_copper) {
 543                 /* according to the manual, the phy will retain its
 544                  * settings across a power-down/up cycle */
 545                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 546                 mii_reg &= ~MII_CR_POWER_DOWN;
 547                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 548         }
 549 }
 550
 551 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 552 {
 553         /* Power down the PHY so no link is implied when interface is down *
 554          * The PHY cannot be powered down if any of the following is TRUE *
 555          * (a) WoL is enabled
 556          * (b) AMT is active
 557          * (c) SoL/IDER session is active */
 558         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 559            adapter->hw.media_type == e1000_media_type_copper) {
 560                 uint16_t mii_reg = 0;
 561
 562                 switch (adapter->hw.mac_type) {
 563                 case e1000_82540:
 564                 case e1000_82545:
 565                 case e1000_82545_rev_3:
 566                 case e1000_82546:
 567                 case e1000_82546_rev_3:
 568                 case e1000_82541:
 569                 case e1000_82541_rev_2:
 570                 case e1000_82547:
 571                 case e1000_82547_rev_2:
 572                         if (E1000_READ_REG(&adapter->hw, MANC) &
 573                             E1000_MANC_SMBUS_EN)
 574                                 goto out;
 575                         break;
 576                 case e1000_82571:
 577                 case e1000_82572:
 578                 case e1000_82573:
 579                 case e1000_80003es2lan:
 580                 case e1000_ich8lan:
 581                         if (e1000_check_mng_mode(&adapter->hw) ||
 582                             e1000_check_phy_reset_block(&adapter->hw))
 583                                 goto out;
 584                         break;
 585                 default:
 586                         goto out;
 587                 }
 588                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 589                 mii_reg |= MII_CR_POWER_DOWN;
 590                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 591                 mdelay(1);
 592         }
 593 out:
 594         return;
 595 }
 596
 597 void
 598 e1000_down(struct e1000_adapter *adapter)
 599 {
 600         struct net_device *netdev = adapter->netdev;
 601
 602         /* signal that we're down so the interrupt handler does not
 603          * reschedule our watchdog timer */
 604         set_bit(__E1000_DOWN, &adapter->flags);
 605
 606 #ifdef CONFIG_E1000_NAPI
 607         napi_disable(&adapter->napi);
 608         atomic_set(&adapter->irq_sem, 0);
 609 #endif
 610         e1000_irq_disable(adapter);
 611
 612         del_timer_sync(&adapter->tx_fifo_stall_timer);
 613         del_timer_sync(&adapter->watchdog_timer);
 614         del_timer_sync(&adapter->phy_info_timer);
 615
 616         netdev->tx_queue_len = adapter->tx_queue_len;
 617         adapter->link_speed = 0;
 618         adapter->link_duplex = 0;
 619         netif_carrier_off(netdev);
 620         netif_stop_queue(netdev);
 621
 622         e1000_reset(adapter);
 623         e1000_clean_all_tx_rings(adapter);
 624         e1000_clean_all_rx_rings(adapter);
 625 }
 626
 627 void
 628 e1000_reinit_locked(struct e1000_adapter *adapter)
 629 {
 630         WARN_ON(in_interrupt());
 631         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 632                 msleep(1);
 633         e1000_down(adapter);
 634         e1000_up(adapter);
 635         clear_bit(__E1000_RESETTING, &adapter->flags);
 636 }
 637
 638 void
 639 e1000_reset(struct e1000_adapter *adapter)
 640 {
 641         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
 642         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 643         boolean_t legacy_pba_adjust = FALSE;
 644
 645         /* Repartition Pba for greater than 9k mtu
 646          * To take effect CTRL.RST is required.
 647          */
 648
 649         switch (adapter->hw.mac_type) {
 650         case e1000_82542_rev2_0:
 651         case e1000_82542_rev2_1:
 652         case e1000_82543:
 653         case e1000_82544:
 654         case e1000_82540:
 655         case e1000_82541:
 656         case e1000_82541_rev_2:
 657                 legacy_pba_adjust = TRUE;
 658                 pba = E1000_PBA_48K;
 659                 break;
 660         case e1000_82545:
 661         case e1000_82545_rev_3:
 662         case e1000_82546:
 663         case e1000_82546_rev_3:
 664                 pba = E1000_PBA_48K;
 665                 break;
 666         case e1000_82547:
 667         case e1000_82547_rev_2:
 668                 legacy_pba_adjust = TRUE;
 669                 pba = E1000_PBA_30K;
 670                 break;
 671         case e1000_82571:
 672         case e1000_82572:
 673         case e1000_80003es2lan:
 674                 pba = E1000_PBA_38K;
 675                 break;
 676         case e1000_82573:
 677                 pba = E1000_PBA_20K;
 678                 break;
 679         case e1000_ich8lan:
 680                 pba = E1000_PBA_8K;
 681         case e1000_undefined:
 682         case e1000_num_macs:
 683                 break;
 684         }
 685
 686         if (legacy_pba_adjust == TRUE) {
 687                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 688                         pba -= 8; /* allocate more FIFO for Tx */
 689
 690                 if (adapter->hw.mac_type == e1000_82547) {
 691                         adapter->tx_fifo_head = 0;
 692                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 693                         adapter->tx_fifo_size =
 694                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 695                         atomic_set(&adapter->tx_fifo_stall, 0);
 696                 }
 697         } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 698                 /* adjust PBA for jumbo frames */
 699                 E1000_WRITE_REG(&adapter->hw, PBA, pba);
 700
 701                 /* To maintain wire speed transmits, the Tx FIFO should be
 702                  * large enough to accomodate two full transmit packets,
 703                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 704                  * the Rx FIFO should be large enough to accomodate at least
 705                  * one full receive packet and is similarly rounded up and
 706                  * expressed in KB. */
 707                 pba = E1000_READ_REG(&adapter->hw, PBA);
 708                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 709                 tx_space = pba >> 16;
 710                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 711                 pba &= 0xffff;
 712                 /* don't include ethernet FCS because hardware appends/strips */
 713                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 714                                VLAN_TAG_SIZE;
 715                 min_tx_space = min_rx_space;
 716                 min_tx_space *= 2;
 717                 min_tx_space = ALIGN(min_tx_space, 1024);
 718                 min_tx_space >>= 10;
 719                 min_rx_space = ALIGN(min_rx_space, 1024);
 720                 min_rx_space >>= 10;
 721
 722                 /* If current Tx allocation is less than the min Tx FIFO size,
 723                  * and the min Tx FIFO size is less than the current Rx FIFO
 724                  * allocation, take space away from current Rx allocation */
 725                 if (tx_space < min_tx_space &&
 726                     ((min_tx_space - tx_space) < pba)) {
 727                         pba = pba - (min_tx_space - tx_space);
 728
 729                         /* PCI/PCIx hardware has PBA alignment constraints */
 730                         switch (adapter->hw.mac_type) {
 731                         case e1000_82545 ... e1000_82546_rev_3:
 732                                 pba &= ~(E1000_PBA_8K - 1);
 733                                 break;
 734                         default:
 735                                 break;
 736                         }
 737
 738                         /* if short on rx space, rx wins and must trump tx
 739                          * adjustment or use Early Receive if available */
 740                         if (pba < min_rx_space) {
 741                                 switch (adapter->hw.mac_type) {
 742                                 case e1000_82573:
 743                                         /* ERT enabled in e1000_configure_rx */
 744                                         break;
 745                                 default:
 746                                         pba = min_rx_space;
 747                                         break;
 748                                 }
 749                         }
 750                 }
 751         }
 752
 753         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 754
 755         /* flow control settings */
 756         /* Set the FC high water mark to 90% of the FIFO size.
 757          * Required to clear last 3 LSB */
 758         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 759         /* We can't use 90% on small FIFOs because the remainder
 760          * would be less than 1 full frame.  In this case, we size
 761          * it to allow at least a full frame above the high water
 762          *  mark. */
 763         if (pba < E1000_PBA_16K)
 764                 fc_high_water_mark = (pba * 1024) - 1600;
 765
 766         adapter->hw.fc_high_water = fc_high_water_mark;
 767         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 768         if (adapter->hw.mac_type == e1000_80003es2lan)
 769                 adapter->hw.fc_pause_time = 0xFFFF;
 770         else
 771                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 772         adapter->hw.fc_send_xon = 1;
 773         adapter->hw.fc = adapter->hw.original_fc;
 774
 775         /* Allow time for pending master requests to run */
 776         e1000_reset_hw(&adapter->hw);
 777         if (adapter->hw.mac_type >= e1000_82544)
 778                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 779
 780         if (e1000_init_hw(&adapter->hw))
 781                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 782         e1000_update_mng_vlan(adapter);
 783
 784         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 785         if (adapter->hw.mac_type >= e1000_82544 &&
 786             adapter->hw.mac_type <= e1000_82547_rev_2 &&
 787             adapter->hw.autoneg == 1 &&
 788             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
 789                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
 790                 /* clear phy power management bit if we are in gig only mode,
 791                  * which if enabled will attempt negotiation to 100Mb, which
 792                  * can cause a loss of link at power off or driver unload */
 793                 ctrl &= ~E1000_CTRL_SWDPIN3;
 794                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
 795         }
 796
 797         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 798         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 799
 800         e1000_reset_adaptive(&adapter->hw);
 801         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 802
 803         if (!adapter->smart_power_down &&
 804             (adapter->hw.mac_type == e1000_82571 ||
 805              adapter->hw.mac_type == e1000_82572)) {
 806                 uint16_t phy_data = 0;
 807                 /* speed up time to link by disabling smart power down, ignore
 808                  * the return value of this function because there is nothing
 809                  * different we would do if it failed */
 810                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 811                                    &phy_data);
 812                 phy_data &= ~IGP02E1000_PM_SPD;
 813                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 814                                     phy_data);
 815         }
 816
 817         e1000_release_manageability(adapter);
 818 }
 819
 820 /**
 821  *  Dump the eeprom for users having checksum issues
 822  **/
 823 void e1000_dump_eeprom(struct e1000_adapter *adapter)
 824 {
 825         struct net_device *netdev = adapter->netdev;
 826         struct ethtool_eeprom eeprom;
 827         const struct ethtool_ops *ops = netdev->ethtool_ops;
 828         u8 *data;
 829         int i;
 830         u16 csum_old, csum_new = 0;
 831
 832         eeprom.len = ops->get_eeprom_len(netdev);
 833         eeprom.offset = 0;
 834
 835         data = kmalloc(eeprom.len, GFP_KERNEL);
 836         if (!data) {
 837                 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
 838                        " data\n");
 839                 return;
 840         }
 841
 842         ops->get_eeprom(netdev, &eeprom, data);
 843
 844         csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
 845                    (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
 846         for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
 847                 csum_new += data[i] + (data[i + 1] << 8);
 848         csum_new = EEPROM_SUM - csum_new;
 849
 850         printk(KERN_ERR "/*********************/\n");
 851         printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
 852         printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
 853
 854         printk(KERN_ERR "Offset    Values\n");
 855         printk(KERN_ERR "========  ======\n");
 856         print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
 857
 858         printk(KERN_ERR "Include this output when contacting your support "
 859                "provider.\n");
 860         printk(KERN_ERR "This is not a software error! Something bad "
 861                "happened to your hardware or\n");
 862         printk(KERN_ERR "EEPROM image. Ignoring this "
 863                "problem could result in further problems,\n");
 864         printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
 865         printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
 866                "which is invalid\n");
 867         printk(KERN_ERR "and requires you to set the proper MAC "
 868                "address manually before continuing\n");
 869         printk(KERN_ERR "to enable this network device.\n");
 870         printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
 871                "to your hardware vendor\n");
 872         printk(KERN_ERR "or Intel Customer Support: linux-nics@intel.com\n");
 873         printk(KERN_ERR "/*********************/\n");
 874
 875         kfree(data);
 876 }
 877
 878 /**
 879  * e1000_probe - Device Initialization Routine
 880  * @pdev: PCI device information struct
 881  * @ent: entry in e1000_pci_tbl
 882  *
 883  * Returns 0 on success, negative on failure
 884  *
 885  * e1000_probe initializes an adapter identified by a pci_dev structure.
 886  * The OS initialization, configuring of the adapter private structure,
 887  * and a hardware reset occur.
 888  **/
 889
 890 static int __devinit
 891 e1000_probe(struct pci_dev *pdev,
 892             const struct pci_device_id *ent)
 893 {
 894         struct net_device *netdev;
 895         struct e1000_adapter *adapter;
 896         unsigned long mmio_start, mmio_len;
 897         unsigned long flash_start, flash_len;
 898
 899         static int cards_found = 0;
 900         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 901         int i, err, pci_using_dac;
 902         uint16_t eeprom_data = 0;
 903         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 904         DECLARE_MAC_BUF(mac);
 905
 906         if ((err = pci_enable_device(pdev)))
 907                 return err;
 908
 909         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 910             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 911                 pci_using_dac = 1;
 912         } else {
 913                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 914                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 915                         E1000_ERR("No usable DMA configuration, aborting\n");
 916                         goto err_dma;
 917                 }
 918                 pci_using_dac = 0;
 919         }
 920
 921         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 922                 goto err_pci_reg;
 923
 924         pci_set_master(pdev);
 925
 926         err = -ENOMEM;
 927         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 928         if (!netdev)
 929                 goto err_alloc_etherdev;
 930
 931         SET_NETDEV_DEV(netdev, &pdev->dev);
 932
 933         pci_set_drvdata(pdev, netdev);
 934         adapter = netdev_priv(netdev);
 935         adapter->netdev = netdev;
 936         adapter->pdev = pdev;
 937         adapter->hw.back = adapter;
 938         adapter->msg_enable = (1 << debug) - 1;
 939
 940         mmio_start = pci_resource_start(pdev, BAR_0);
 941         mmio_len = pci_resource_len(pdev, BAR_0);
 942
 943         err = -EIO;
 944         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 945         if (!adapter->hw.hw_addr)
 946                 goto err_ioremap;
 947
 948         for (i = BAR_1; i <= BAR_5; i++) {
 949                 if (pci_resource_len(pdev, i) == 0)
 950                         continue;
 951                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 952                         adapter->hw.io_base = pci_resource_start(pdev, i);
 953                         break;
 954                 }
 955         }
 956
 957         netdev->open = &e1000_open;
 958         netdev->stop = &e1000_close;
 959         netdev->hard_start_xmit = &e1000_xmit_frame;
 960         netdev->get_stats = &e1000_get_stats;
 961         netdev->set_rx_mode = &e1000_set_rx_mode;
 962         netdev->set_mac_address = &e1000_set_mac;
 963         netdev->change_mtu = &e1000_change_mtu;
 964         netdev->do_ioctl = &e1000_ioctl;
 965         e1000_set_ethtool_ops(netdev);
 966         netdev->tx_timeout = &e1000_tx_timeout;
 967         netdev->watchdog_timeo = 5 * HZ;
 968 #ifdef CONFIG_E1000_NAPI
 969         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
 970 #endif
 971         netdev->vlan_rx_register = e1000_vlan_rx_register;
 972         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 973         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 974 #ifdef CONFIG_NET_POLL_CONTROLLER
 975         netdev->poll_controller = e1000_netpoll;
 976 #endif
 977         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 978
 979         netdev->mem_start = mmio_start;
 980         netdev->mem_end = mmio_start + mmio_len;
 981         netdev->base_addr = adapter->hw.io_base;
 982
 983         adapter->bd_number = cards_found;
 984
 985         /* setup the private structure */
 986
 987         if ((err = e1000_sw_init(adapter)))
 988                 goto err_sw_init;
 989
 990         err = -EIO;
 991         /* Flash BAR mapping must happen after e1000_sw_init
 992          * because it depends on mac_type */
 993         if ((adapter->hw.mac_type == e1000_ich8lan) &&
 994            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 995                 flash_start = pci_resource_start(pdev, 1);
 996                 flash_len = pci_resource_len(pdev, 1);
 997                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
 998                 if (!adapter->hw.flash_address)
 999                         goto err_flashmap;
1000         }
1001
1002         if (e1000_check_phy_reset_block(&adapter->hw))
1003                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1004
1005         if (adapter->hw.mac_type >= e1000_82543) {
1006                 netdev->features = NETIF_F_SG |
1007                                    NETIF_F_HW_CSUM |
1008                                    NETIF_F_HW_VLAN_TX |
1009                                    NETIF_F_HW_VLAN_RX |
1010                                    NETIF_F_HW_VLAN_FILTER;
1011                 if (adapter->hw.mac_type == e1000_ich8lan)
1012                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1013         }
1014
1015         if ((adapter->hw.mac_type >= e1000_82544) &&
1016            (adapter->hw.mac_type != e1000_82547))
1017                 netdev->features |= NETIF_F_TSO;
1018
1019         if (adapter->hw.mac_type > e1000_82547_rev_2)
1020                 netdev->features |= NETIF_F_TSO6;
1021         if (pci_using_dac)
1022                 netdev->features |= NETIF_F_HIGHDMA;
1023
1024         netdev->features |= NETIF_F_LLTX;
1025
1026         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1027
1028         /* initialize eeprom parameters */
1029         if (e1000_init_eeprom_params(&adapter->hw)) {
1030                 E1000_ERR("EEPROM initialization failed\n");
1031                 goto err_eeprom;
1032         }
1033
1034         /* before reading the EEPROM, reset the controller to
1035          * put the device in a known good starting state */
1036
1037         e1000_reset_hw(&adapter->hw);
1038
1039         /* make sure the EEPROM is good */
1040         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1041                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1042                 e1000_dump_eeprom(adapter);
1043                 /*
1044                  * set MAC address to all zeroes to invalidate and temporary
1045                  * disable this device for the user. This blocks regular
1046                  * traffic while still permitting ethtool ioctls from reaching
1047                  * the hardware as well as allowing the user to run the
1048                  * interface after manually setting a hw addr using
1049                  * `ip set address`
1050                  */
1051                 memset(adapter->hw.mac_addr, 0, netdev->addr_len);
1052         } else {
1053                 /* copy the MAC address out of the EEPROM */
1054                 if (e1000_read_mac_addr(&adapter->hw))
1055                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1056         }
1057         /* don't block initalization here due to bad MAC address */
1058         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1059         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1060
1061         if (!is_valid_ether_addr(netdev->perm_addr))
1062                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1063
1064         e1000_get_bus_info(&adapter->hw);
1065
1066         init_timer(&adapter->tx_fifo_stall_timer);
1067         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1068         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1069
1070         init_timer(&adapter->watchdog_timer);
1071         adapter->watchdog_timer.function = &e1000_watchdog;
1072         adapter->watchdog_timer.data = (unsigned long) adapter;
1073
1074         init_timer(&adapter->phy_info_timer);
1075         adapter->phy_info_timer.function = &e1000_update_phy_info;
1076         adapter->phy_info_timer.data = (unsigned long) adapter;
1077
1078         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1079
1080         e1000_check_options(adapter);
1081
1082         /* Initial Wake on LAN setting
1083          * If APM wake is enabled in the EEPROM,
1084          * enable the ACPI Magic Packet filter
1085          */
1086
1087         switch (adapter->hw.mac_type) {
1088         case e1000_82542_rev2_0:
1089         case e1000_82542_rev2_1:
1090         case e1000_82543:
1091                 break;
1092         case e1000_82544:
1093                 e1000_read_eeprom(&adapter->hw,
1094                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1095                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1096                 break;
1097         case e1000_ich8lan:
1098                 e1000_read_eeprom(&adapter->hw,
1099                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1100                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1101                 break;
1102         case e1000_82546:
1103         case e1000_82546_rev_3:
1104         case e1000_82571:
1105         case e1000_80003es2lan:
1106                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1107                         e1000_read_eeprom(&adapter->hw,
1108                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1109                         break;
1110                 }
1111                 /* Fall Through */
1112         default:
1113                 e1000_read_eeprom(&adapter->hw,
1114                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1115                 break;
1116         }
1117         if (eeprom_data & eeprom_apme_mask)
1118                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1119
1120         /* now that we have the eeprom settings, apply the special cases
1121          * where the eeprom may be wrong or the board simply won't support
1122          * wake on lan on a particular port */
1123         switch (pdev->device) {
1124         case E1000_DEV_ID_82546GB_PCIE:
1125                 adapter->eeprom_wol = 0;
1126                 break;
1127         case E1000_DEV_ID_82546EB_FIBER:
1128         case E1000_DEV_ID_82546GB_FIBER:
1129         case E1000_DEV_ID_82571EB_FIBER:
1130                 /* Wake events only supported on port A for dual fiber
1131                  * regardless of eeprom setting */
1132                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1133                         adapter->eeprom_wol = 0;
1134                 break;
1135         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1136         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1137         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1138         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1139         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1140                 /* if quad port adapter, disable WoL on all but port A */
1141                 if (global_quad_port_a != 0)
1142                         adapter->eeprom_wol = 0;
1143                 else
1144                         adapter->quad_port_a = 1;
1145                 /* Reset for multiple quad port adapters */
1146                 if (++global_quad_port_a == 4)
1147                         global_quad_port_a = 0;
1148                 break;
1149         }
1150
1151         /* initialize the wol settings based on the eeprom settings */
1152         adapter->wol = adapter->eeprom_wol;
1153
1154         /* print bus type/speed/width info */
1155         {
1156         struct e1000_hw *hw = &adapter->hw;
1157         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1158                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1159                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1160                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1161                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1162                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1163                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1164                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1165                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1166                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1167                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1168                  "32-bit"));
1169         }
1170
1171         printk("%s\n", print_mac(mac, netdev->dev_addr));
1172
1173         /* reset the hardware with the new settings */
1174         e1000_reset(adapter);
1175
1176         /* If the controller is 82573 and f/w is AMT, do not set
1177          * DRV_LOAD until the interface is up.  For all other cases,
1178          * let the f/w know that the h/w is now under the control
1179          * of the driver. */
1180         if (adapter->hw.mac_type != e1000_82573 ||
1181             !e1000_check_mng_mode(&adapter->hw))
1182                 e1000_get_hw_control(adapter);
1183
1184         /* tell the stack to leave us alone until e1000_open() is called */
1185         netif_carrier_off(netdev);
1186         netif_stop_queue(netdev);
1187
1188         strcpy(netdev->name, "eth%d");
1189         if ((err = register_netdev(netdev)))
1190                 goto err_register;
1191
1192         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1193
1194         cards_found++;
1195         return 0;
1196
1197 err_register:
1198         e1000_release_hw_control(adapter);
1199 err_eeprom:
1200         if (!e1000_check_phy_reset_block(&adapter->hw))
1201                 e1000_phy_hw_reset(&adapter->hw);
1202
1203         if (adapter->hw.flash_address)
1204                 iounmap(adapter->hw.flash_address);
1205 err_flashmap:
1206 #ifdef CONFIG_E1000_NAPI
1207         for (i = 0; i < adapter->num_rx_queues; i++)
1208                 dev_put(&adapter->polling_netdev[i]);
1209 #endif
1210
1211         kfree(adapter->tx_ring);
1212         kfree(adapter->rx_ring);
1213 #ifdef CONFIG_E1000_NAPI
1214         kfree(adapter->polling_netdev);
1215 #endif
1216 err_sw_init:
1217         iounmap(adapter->hw.hw_addr);
1218 err_ioremap:
1219         free_netdev(netdev);
1220 err_alloc_etherdev:
1221         pci_release_regions(pdev);
1222 err_pci_reg:
1223 err_dma:
1224         pci_disable_device(pdev);
1225         return err;
1226 }
1227
1228 /**
1229  * e1000_remove - Device Removal Routine
1230  * @pdev: PCI device information struct
1231  *
1232  * e1000_remove is called by the PCI subsystem to alert the driver
1233  * that it should release a PCI device.  The could be caused by a
1234  * Hot-Plug event, or because the driver is going to be removed from
1235  * memory.
1236  **/
1237
1238 static void __devexit
1239 e1000_remove(struct pci_dev *pdev)
1240 {
1241         struct net_device *netdev = pci_get_drvdata(pdev);
1242         struct e1000_adapter *adapter = netdev_priv(netdev);
1243 #ifdef CONFIG_E1000_NAPI
1244         int i;
1245 #endif
1246
1247         cancel_work_sync(&adapter->reset_task);
1248
1249         e1000_release_manageability(adapter);
1250
1251         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1252          * would have already happened in close and is redundant. */
1253         e1000_release_hw_control(adapter);
1254
1255 #ifdef CONFIG_E1000_NAPI
1256         for (i = 0; i < adapter->num_rx_queues; i++)
1257                 dev_put(&adapter->polling_netdev[i]);
1258 #endif
1259
1260         unregister_netdev(netdev);
1261
1262         if (!e1000_check_phy_reset_block(&adapter->hw))
1263                 e1000_phy_hw_reset(&adapter->hw);
1264
1265         kfree(adapter->tx_ring);
1266         kfree(adapter->rx_ring);
1267 #ifdef CONFIG_E1000_NAPI
1268         kfree(adapter->polling_netdev);
1269 #endif
1270
1271         iounmap(adapter->hw.hw_addr);
1272         if (adapter->hw.flash_address)
1273                 iounmap(adapter->hw.flash_address);
1274         pci_release_regions(pdev);
1275
1276         free_netdev(netdev);
1277
1278         pci_disable_device(pdev);
1279 }
1280
1281 /**
1282  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1283  * @adapter: board private structure to initialize
1284  *
1285  * e1000_sw_init initializes the Adapter private data structure.
1286  * Fields are initialized based on PCI device information and
1287  * OS network device settings (MTU size).
1288  **/
1289
1290 static int __devinit
1291 e1000_sw_init(struct e1000_adapter *adapter)
1292 {
1293         struct e1000_hw *hw = &adapter->hw;
1294         struct net_device *netdev = adapter->netdev;
1295         struct pci_dev *pdev = adapter->pdev;
1296 #ifdef CONFIG_E1000_NAPI
1297         int i;
1298 #endif
1299
1300         /* PCI config space info */
1301
1302         hw->vendor_id = pdev->vendor;
1303         hw->device_id = pdev->device;
1304         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1305         hw->subsystem_id = pdev->subsystem_device;
1306         hw->revision_id = pdev->revision;
1307
1308         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1309
1310         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1311         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1312         hw->max_frame_size = netdev->mtu +
1313                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1314         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1315
1316         /* identify the MAC */
1317
1318         if (e1000_set_mac_type(hw)) {
1319                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1320                 return -EIO;
1321         }
1322
1323         switch (hw->mac_type) {
1324         default:
1325                 break;
1326         case e1000_82541:
1327         case e1000_82547:
1328         case e1000_82541_rev_2:
1329         case e1000_82547_rev_2:
1330                 hw->phy_init_script = 1;
1331                 break;
1332         }
1333
1334         e1000_set_media_type(hw);
1335
1336         hw->wait_autoneg_complete = FALSE;
1337         hw->tbi_compatibility_en = TRUE;
1338         hw->adaptive_ifs = TRUE;
1339
1340         /* Copper options */
1341
1342         if (hw->media_type == e1000_media_type_copper) {
1343                 hw->mdix = AUTO_ALL_MODES;
1344                 hw->disable_polarity_correction = FALSE;
1345                 hw->master_slave = E1000_MASTER_SLAVE;
1346         }
1347
1348         adapter->num_tx_queues = 1;
1349         adapter->num_rx_queues = 1;
1350
1351         if (e1000_alloc_queues(adapter)) {
1352                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1353                 return -ENOMEM;
1354         }
1355
1356 #ifdef CONFIG_E1000_NAPI
1357         for (i = 0; i < adapter->num_rx_queues; i++) {
1358                 adapter->polling_netdev[i].priv = adapter;
1359                 dev_hold(&adapter->polling_netdev[i]);
1360                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1361         }
1362         spin_lock_init(&adapter->tx_queue_lock);
1363 #endif
1364
1365         /* Explicitly disable IRQ since the NIC can be in any state. */
1366         atomic_set(&adapter->irq_sem, 0);
1367         e1000_irq_disable(adapter);
1368
1369         spin_lock_init(&adapter->stats_lock);
1370
1371         set_bit(__E1000_DOWN, &adapter->flags);
1372
1373         return 0;
1374 }
1375
1376 /**
1377  * e1000_alloc_queues - Allocate memory for all rings
1378  * @adapter: board private structure to initialize
1379  *
1380  * We allocate one ring per queue at run-time since we don't know the
1381  * number of queues at compile-time.  The polling_netdev array is
1382  * intended for Multiqueue, but should work fine with a single queue.
1383  **/
1384
1385 static int __devinit
1386 e1000_alloc_queues(struct e1000_adapter *adapter)
1387 {
1388         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1389                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1390         if (!adapter->tx_ring)
1391                 return -ENOMEM;
1392
1393         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1394                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1395         if (!adapter->rx_ring) {
1396                 kfree(adapter->tx_ring);
1397                 return -ENOMEM;
1398         }
1399
1400 #ifdef CONFIG_E1000_NAPI
1401         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1402                                           sizeof(struct net_device),
1403                                           GFP_KERNEL);
1404         if (!adapter->polling_netdev) {
1405                 kfree(adapter->tx_ring);
1406                 kfree(adapter->rx_ring);
1407                 return -ENOMEM;
1408         }
1409 #endif
1410
1411         return E1000_SUCCESS;
1412 }
1413
1414 /**
1415  * e1000_open - Called when a network interface is made active
1416  * @netdev: network interface device structure
1417  *
1418  * Returns 0 on success, negative value on failure
1419  *
1420  * The open entry point is called when a network interface is made
1421  * active by the system (IFF_UP).  At this point all resources needed
1422  * for transmit and receive operations are allocated, the interrupt
1423  * handler is registered with the OS, the watchdog timer is started,
1424  * and the stack is notified that the interface is ready.
1425  **/
1426
1427 static int
1428 e1000_open(struct net_device *netdev)
1429 {
1430         struct e1000_adapter *adapter = netdev_priv(netdev);
1431         int err;
1432
1433         /* disallow open during test */
1434         if (test_bit(__E1000_TESTING, &adapter->flags))
1435                 return -EBUSY;
1436
1437         /* allocate transmit descriptors */
1438         err = e1000_setup_all_tx_resources(adapter);
1439         if (err)
1440                 goto err_setup_tx;
1441
1442         /* allocate receive descriptors */
1443         err = e1000_setup_all_rx_resources(adapter);
1444         if (err)
1445                 goto err_setup_rx;
1446
1447         e1000_power_up_phy(adapter);
1448
1449         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1450         if ((adapter->hw.mng_cookie.status &
1451                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1452                 e1000_update_mng_vlan(adapter);
1453         }
1454
1455         /* If AMT is enabled, let the firmware know that the network
1456          * interface is now open */
1457         if (adapter->hw.mac_type == e1000_82573 &&
1458             e1000_check_mng_mode(&adapter->hw))
1459                 e1000_get_hw_control(adapter);
1460
1461         /* before we allocate an interrupt, we must be ready to handle it.
1462          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1463          * as soon as we call pci_request_irq, so we have to setup our
1464          * clean_rx handler before we do so.  */
1465         e1000_configure(adapter);
1466
1467         err = e1000_request_irq(adapter);
1468         if (err)
1469                 goto err_req_irq;
1470
1471         /* From here on the code is the same as e1000_up() */
1472         clear_bit(__E1000_DOWN, &adapter->flags);
1473
1474 #ifdef CONFIG_E1000_NAPI
1475         napi_enable(&adapter->napi);
1476 #endif
1477
1478         e1000_irq_enable(adapter);
1479
1480         /* fire a link status change interrupt to start the watchdog */
1481         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1482
1483         return E1000_SUCCESS;
1484
1485 err_req_irq:
1486         e1000_release_hw_control(adapter);
1487         e1000_power_down_phy(adapter);
1488         e1000_free_all_rx_resources(adapter);
1489 err_setup_rx:
1490         e1000_free_all_tx_resources(adapter);
1491 err_setup_tx:
1492         e1000_reset(adapter);
1493
1494         return err;
1495 }
1496
1497 /**
1498  * e1000_close - Disables a network interface
1499  * @netdev: network interface device structure
1500  *
1501  * Returns 0, this is not allowed to fail
1502  *
1503  * The close entry point is called when an interface is de-activated
1504  * by the OS.  The hardware is still under the drivers control, but
1505  * needs to be disabled.  A global MAC reset is issued to stop the
1506  * hardware, and all transmit and receive resources are freed.
1507  **/
1508
1509 static int
1510 e1000_close(struct net_device *netdev)
1511 {
1512         struct e1000_adapter *adapter = netdev_priv(netdev);
1513
1514         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1515         e1000_down(adapter);
1516         e1000_power_down_phy(adapter);
1517         e1000_free_irq(adapter);
1518
1519         e1000_free_all_tx_resources(adapter);
1520         e1000_free_all_rx_resources(adapter);
1521
1522         /* kill manageability vlan ID if supported, but not if a vlan with
1523          * the same ID is registered on the host OS (let 8021q kill it) */
1524         if ((adapter->hw.mng_cookie.status &
1525                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1526              !(adapter->vlgrp &&
1527                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1528                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1529         }
1530
1531         /* If AMT is enabled, let the firmware know that the network
1532          * interface is now closed */
1533         if (adapter->hw.mac_type == e1000_82573 &&
1534             e1000_check_mng_mode(&adapter->hw))
1535                 e1000_release_hw_control(adapter);
1536
1537         return 0;
1538 }
1539
1540 /**
1541  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1542  * @adapter: address of board private structure
1543  * @start: address of beginning of memory
1544  * @len: length of memory
1545  **/
1546 static boolean_t
1547 e1000_check_64k_bound(struct e1000_adapter *adapter,
1548                       void *start, unsigned long len)
1549 {
1550         unsigned long begin = (unsigned long) start;
1551         unsigned long end = begin + len;
1552
1553         /* First rev 82545 and 82546 need to not allow any memory
1554          * write location to cross 64k boundary due to errata 23 */
1555         if (adapter->hw.mac_type == e1000_82545 ||
1556             adapter->hw.mac_type == e1000_82546) {
1557                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1558         }
1559
1560         return TRUE;
1561 }
1562
1563 /**
1564  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1565  * @adapter: board private structure
1566  * @txdr:    tx descriptor ring (for a specific queue) to setup
1567  *
1568  * Return 0 on success, negative on failure
1569  **/
1570
1571 static int
1572 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1573                          struct e1000_tx_ring *txdr)
1574 {
1575         struct pci_dev *pdev = adapter->pdev;
1576         int size;
1577
1578         size = sizeof(struct e1000_buffer) * txdr->count;
1579         txdr->buffer_info = vmalloc(size);
1580         if (!txdr->buffer_info) {
1581                 DPRINTK(PROBE, ERR,
1582                 "Unable to allocate memory for the transmit descriptor ring\n");
1583                 return -ENOMEM;
1584         }
1585         memset(txdr->buffer_info, 0, size);
1586
1587         /* round up to nearest 4K */
1588
1589         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1590         txdr->size = ALIGN(txdr->size, 4096);
1591
1592         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1593         if (!txdr->desc) {
1594 setup_tx_desc_die:
1595                 vfree(txdr->buffer_info);
1596                 DPRINTK(PROBE, ERR,
1597                 "Unable to allocate memory for the transmit descriptor ring\n");
1598                 return -ENOMEM;
1599         }
1600
1601         /* Fix for errata 23, can't cross 64kB boundary */
1602         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1603                 void *olddesc = txdr->desc;
1604                 dma_addr_t olddma = txdr->dma;
1605                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1606                                      "at %p\n", txdr->size, txdr->desc);
1607                 /* Try again, without freeing the previous */
1608                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1609                 /* Failed allocation, critical failure */
1610                 if (!txdr->desc) {
1611                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1612                         goto setup_tx_desc_die;
1613                 }
1614
1615                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1616                         /* give up */
1617                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1618                                             txdr->dma);
1619                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1620                         DPRINTK(PROBE, ERR,
1621                                 "Unable to allocate aligned memory "
1622                                 "for the transmit descriptor ring\n");
1623                         vfree(txdr->buffer_info);
1624                         return -ENOMEM;
1625                 } else {
1626                         /* Free old allocation, new allocation was successful */
1627                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1628                 }
1629         }
1630         memset(txdr->desc, 0, txdr->size);
1631
1632         txdr->next_to_use = 0;
1633         txdr->next_to_clean = 0;
1634         spin_lock_init(&txdr->tx_lock);
1635
1636         return 0;
1637 }
1638
1639 /**
1640  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1641  *                                (Descriptors) for all queues
1642  * @adapter: board private structure
1643  *
1644  * Return 0 on success, negative on failure
1645  **/
1646
1647 int
1648 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1649 {
1650         int i, err = 0;
1651
1652         for (i = 0; i < adapter->num_tx_queues; i++) {
1653                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1654                 if (err) {
1655                         DPRINTK(PROBE, ERR,
1656                                 "Allocation for Tx Queue %u failed\n", i);
1657                         for (i-- ; i >= 0; i--)
1658                                 e1000_free_tx_resources(adapter,
1659                                                         &adapter->tx_ring[i]);
1660                         break;
1661                 }
1662         }
1663
1664         return err;
1665 }
1666
1667 /**
1668  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1669  * @adapter: board private structure
1670  *
1671  * Configure the Tx unit of the MAC after a reset.
1672  **/
1673
1674 static void
1675 e1000_configure_tx(struct e1000_adapter *adapter)
1676 {
1677         uint64_t tdba;
1678         struct e1000_hw *hw = &adapter->hw;
1679         uint32_t tdlen, tctl, tipg, tarc;
1680         uint32_t ipgr1, ipgr2;
1681
1682         /* Setup the HW Tx Head and Tail descriptor pointers */
1683
1684         switch (adapter->num_tx_queues) {
1685         case 1:
1686         default:
1687                 tdba = adapter->tx_ring[0].dma;
1688                 tdlen = adapter->tx_ring[0].count *
1689                         sizeof(struct e1000_tx_desc);
1690                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1691                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1692                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1693                 E1000_WRITE_REG(hw, TDT, 0);
1694                 E1000_WRITE_REG(hw, TDH, 0);
1695                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1696                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1697                 break;
1698         }
1699
1700         /* Set the default values for the Tx Inter Packet Gap timer */
1701         if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1702             (hw->media_type == e1000_media_type_fiber ||
1703              hw->media_type == e1000_media_type_internal_serdes))
1704                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1705         else
1706                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1707
1708         switch (hw->mac_type) {
1709         case e1000_82542_rev2_0:
1710         case e1000_82542_rev2_1:
1711                 tipg = DEFAULT_82542_TIPG_IPGT;
1712                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1713                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1714                 break;
1715         case e1000_80003es2lan:
1716                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1717                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1718                 break;
1719         default:
1720                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1721                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1722                 break;
1723         }
1724         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1725         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1726         E1000_WRITE_REG(hw, TIPG, tipg);
1727
1728         /* Set the Tx Interrupt Delay register */
1729
1730         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1731         if (hw->mac_type >= e1000_82540)
1732                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1733
1734         /* Program the Transmit Control Register */
1735
1736         tctl = E1000_READ_REG(hw, TCTL);
1737         tctl &= ~E1000_TCTL_CT;
1738         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1739                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1740
1741         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1742                 tarc = E1000_READ_REG(hw, TARC0);
1743                 /* set the speed mode bit, we'll clear it if we're not at
1744                  * gigabit link later */
1745                 tarc |= (1 << 21);
1746                 E1000_WRITE_REG(hw, TARC0, tarc);
1747         } else if (hw->mac_type == e1000_80003es2lan) {
1748                 tarc = E1000_READ_REG(hw, TARC0);
1749                 tarc |= 1;
1750                 E1000_WRITE_REG(hw, TARC0, tarc);
1751                 tarc = E1000_READ_REG(hw, TARC1);
1752                 tarc |= 1;
1753                 E1000_WRITE_REG(hw, TARC1, tarc);
1754         }
1755
1756         e1000_config_collision_dist(hw);
1757
1758         /* Setup Transmit Descriptor Settings for eop descriptor */
1759         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1760
1761         /* only set IDE if we are delaying interrupts using the timers */
1762         if (adapter->tx_int_delay)
1763                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1764
1765         if (hw->mac_type < e1000_82543)
1766                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1767         else
1768                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1769
1770         /* Cache if we're 82544 running in PCI-X because we'll
1771          * need this to apply a workaround later in the send path. */
1772         if (hw->mac_type == e1000_82544 &&
1773             hw->bus_type == e1000_bus_type_pcix)
1774                 adapter->pcix_82544 = 1;
1775
1776         E1000_WRITE_REG(hw, TCTL, tctl);
1777
1778 }
1779
1780 /**
1781  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1782  * @adapter: board private structure
1783  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1784  *
1785  * Returns 0 on success, negative on failure
1786  **/
1787
1788 static int
1789 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1790                          struct e1000_rx_ring *rxdr)
1791 {
1792         struct pci_dev *pdev = adapter->pdev;
1793         int size, desc_len;
1794
1795         size = sizeof(struct e1000_buffer) * rxdr->count;
1796         rxdr->buffer_info = vmalloc(size);
1797         if (!rxdr->buffer_info) {
1798                 DPRINTK(PROBE, ERR,
1799                 "Unable to allocate memory for the receive descriptor ring\n");
1800                 return -ENOMEM;
1801         }
1802         memset(rxdr->buffer_info, 0, size);
1803
1804         rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1805                                 GFP_KERNEL);
1806         if (!rxdr->ps_page) {
1807                 vfree(rxdr->buffer_info);
1808                 DPRINTK(PROBE, ERR,
1809                 "Unable to allocate memory for the receive descriptor ring\n");
1810                 return -ENOMEM;
1811         }
1812
1813         rxdr->ps_page_dma = kcalloc(rxdr->count,
1814                                     sizeof(struct e1000_ps_page_dma),
1815                                     GFP_KERNEL);
1816         if (!rxdr->ps_page_dma) {
1817                 vfree(rxdr->buffer_info);
1818                 kfree(rxdr->ps_page);
1819                 DPRINTK(PROBE, ERR,
1820                 "Unable to allocate memory for the receive descriptor ring\n");
1821                 return -ENOMEM;
1822         }
1823
1824         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1825                 desc_len = sizeof(struct e1000_rx_desc);
1826         else
1827                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1828
1829         /* Round up to nearest 4K */
1830
1831         rxdr->size = rxdr->count * desc_len;
1832         rxdr->size = ALIGN(rxdr->size, 4096);
1833
1834         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1835
1836         if (!rxdr->desc) {
1837                 DPRINTK(PROBE, ERR,
1838                 "Unable to allocate memory for the receive descriptor ring\n");
1839 setup_rx_desc_die:
1840                 vfree(rxdr->buffer_info);
1841                 kfree(rxdr->ps_page);
1842                 kfree(rxdr->ps_page_dma);
1843                 return -ENOMEM;
1844         }
1845
1846         /* Fix for errata 23, can't cross 64kB boundary */
1847         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1848                 void *olddesc = rxdr->desc;
1849                 dma_addr_t olddma = rxdr->dma;
1850                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1851                                      "at %p\n", rxdr->size, rxdr->desc);
1852                 /* Try again, without freeing the previous */
1853                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1854                 /* Failed allocation, critical failure */
1855                 if (!rxdr->desc) {
1856                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1857                         DPRINTK(PROBE, ERR,
1858                                 "Unable to allocate memory "
1859                                 "for the receive descriptor ring\n");
1860                         goto setup_rx_desc_die;
1861                 }
1862
1863                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1864                         /* give up */
1865                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1866                                             rxdr->dma);
1867                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1868                         DPRINTK(PROBE, ERR,
1869                                 "Unable to allocate aligned memory "
1870                                 "for the receive descriptor ring\n");
1871                         goto setup_rx_desc_die;
1872                 } else {
1873                         /* Free old allocation, new allocation was successful */
1874                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1875                 }
1876         }
1877         memset(rxdr->desc, 0, rxdr->size);
1878
1879         rxdr->next_to_clean = 0;
1880         rxdr->next_to_use = 0;
1881
1882         return 0;
1883 }
1884
1885 /**
1886  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1887  *                                (Descriptors) for all queues
1888  * @adapter: board private structure
1889  *
1890  * Return 0 on success, negative on failure
1891  **/
1892
1893 int
1894 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1895 {
1896         int i, err = 0;
1897
1898         for (i = 0; i < adapter->num_rx_queues; i++) {
1899                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1900                 if (err) {
1901                         DPRINTK(PROBE, ERR,
1902                                 "Allocation for Rx Queue %u failed\n", i);
1903                         for (i-- ; i >= 0; i--)
1904                                 e1000_free_rx_resources(adapter,
1905                                                         &adapter->rx_ring[i]);
1906                         break;
1907                 }
1908         }
1909
1910         return err;
1911 }
1912
1913 /**
1914  * e1000_setup_rctl - configure the receive control registers
1915  * @adapter: Board private structure
1916  **/
1917 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1918                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1919 static void
1920 e1000_setup_rctl(struct e1000_adapter *adapter)
1921 {
1922         uint32_t rctl, rfctl;
1923         uint32_t psrctl = 0;
1924 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1925         uint32_t pages = 0;
1926 #endif
1927
1928         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1929
1930         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1931
1932         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1933                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1934                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1935
1936         if (adapter->hw.tbi_compatibility_on == 1)
1937                 rctl |= E1000_RCTL_SBP;
1938         else
1939                 rctl &= ~E1000_RCTL_SBP;
1940
1941         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1942                 rctl &= ~E1000_RCTL_LPE;
1943         else
1944                 rctl |= E1000_RCTL_LPE;
1945
1946         /* Setup buffer sizes */
1947         rctl &= ~E1000_RCTL_SZ_4096;
1948         rctl |= E1000_RCTL_BSEX;
1949         switch (adapter->rx_buffer_len) {
1950                 case E1000_RXBUFFER_256:
1951                         rctl |= E1000_RCTL_SZ_256;
1952                         rctl &= ~E1000_RCTL_BSEX;
1953                         break;
1954                 case E1000_RXBUFFER_512:
1955                         rctl |= E1000_RCTL_SZ_512;
1956                         rctl &= ~E1000_RCTL_BSEX;
1957                         break;
1958                 case E1000_RXBUFFER_1024:
1959                         rctl |= E1000_RCTL_SZ_1024;
1960                         rctl &= ~E1000_RCTL_BSEX;
1961                         break;
1962                 case E1000_RXBUFFER_2048:
1963                 default:
1964                         rctl |= E1000_RCTL_SZ_2048;
1965                         rctl &= ~E1000_RCTL_BSEX;
1966                         break;
1967                 case E1000_RXBUFFER_4096:
1968                         rctl |= E1000_RCTL_SZ_4096;
1969                         break;
1970                 case E1000_RXBUFFER_8192:
1971                         rctl |= E1000_RCTL_SZ_8192;
1972                         break;
1973                 case E1000_RXBUFFER_16384:
1974                         rctl |= E1000_RCTL_SZ_16384;
1975                         break;
1976         }
1977
1978 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1979         /* 82571 and greater support packet-split where the protocol
1980          * header is placed in skb->data and the packet data is
1981          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1982          * In the case of a non-split, skb->data is linearly filled,
1983          * followed by the page buffers.  Therefore, skb->data is
1984          * sized to hold the largest protocol header.
1985          */
1986         /* allocations using alloc_page take too long for regular MTU
1987          * so only enable packet split for jumbo frames */
1988         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1989         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
1990             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
1991                 adapter->rx_ps_pages = pages;
1992         else
1993                 adapter->rx_ps_pages = 0;
1994 #endif
1995         if (adapter->rx_ps_pages) {
1996                 /* Configure extra packet-split registers */
1997                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1998                 rfctl |= E1000_RFCTL_EXTEN;
1999                 /* disable packet split support for IPv6 extension headers,
2000                  * because some malformed IPv6 headers can hang the RX */
2001                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2002                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2003
2004                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
2005
2006                 rctl |= E1000_RCTL_DTYP_PS;
2007
2008                 psrctl |= adapter->rx_ps_bsize0 >>
2009                         E1000_PSRCTL_BSIZE0_SHIFT;
2010
2011                 switch (adapter->rx_ps_pages) {
2012                 case 3:
2013                         psrctl |= PAGE_SIZE <<
2014                                 E1000_PSRCTL_BSIZE3_SHIFT;
2015                 case 2:
2016                         psrctl |= PAGE_SIZE <<
2017                                 E1000_PSRCTL_BSIZE2_SHIFT;
2018                 case 1:
2019                         psrctl |= PAGE_SIZE >>
2020                                 E1000_PSRCTL_BSIZE1_SHIFT;
2021                         break;
2022                 }
2023
2024                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
2025         }
2026
2027         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2028 }
2029
2030 /**
2031  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2032  * @adapter: board private structure
2033  *
2034  * Configure the Rx unit of the MAC after a reset.
2035  **/
2036
2037 static void
2038 e1000_configure_rx(struct e1000_adapter *adapter)
2039 {
2040         uint64_t rdba;
2041         struct e1000_hw *hw = &adapter->hw;
2042         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2043
2044         if (adapter->rx_ps_pages) {
2045                 /* this is a 32 byte descriptor */
2046                 rdlen = adapter->rx_ring[0].count *
2047                         sizeof(union e1000_rx_desc_packet_split);
2048                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2049                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2050         } else {
2051                 rdlen = adapter->rx_ring[0].count *
2052                         sizeof(struct e1000_rx_desc);
2053                 adapter->clean_rx = e1000_clean_rx_irq;
2054                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2055         }
2056
2057         /* disable receives while setting up the descriptors */
2058         rctl = E1000_READ_REG(hw, RCTL);
2059         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2060
2061         /* set the Receive Delay Timer Register */
2062         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2063
2064         if (hw->mac_type >= e1000_82540) {
2065                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2066                 if (adapter->itr_setting != 0)
2067                         E1000_WRITE_REG(hw, ITR,
2068                                 1000000000 / (adapter->itr * 256));
2069         }
2070
2071         if (hw->mac_type >= e1000_82571) {
2072                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2073                 /* Reset delay timers after every interrupt */
2074                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2075 #ifdef CONFIG_E1000_NAPI
2076                 /* Auto-Mask interrupts upon ICR access */
2077                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2078                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2079 #endif
2080                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2081                 E1000_WRITE_FLUSH(hw);
2082         }
2083
2084         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2085          * the Base and Length of the Rx Descriptor Ring */
2086         switch (adapter->num_rx_queues) {
2087         case 1:
2088         default:
2089                 rdba = adapter->rx_ring[0].dma;
2090                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2091                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2092                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2093                 E1000_WRITE_REG(hw, RDT, 0);
2094                 E1000_WRITE_REG(hw, RDH, 0);
2095                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2096                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2097                 break;
2098         }
2099
2100         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2101         if (hw->mac_type >= e1000_82543) {
2102                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2103                 if (adapter->rx_csum == TRUE) {
2104                         rxcsum |= E1000_RXCSUM_TUOFL;
2105
2106                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2107                          * Must be used in conjunction with packet-split. */
2108                         if ((hw->mac_type >= e1000_82571) &&
2109                             (adapter->rx_ps_pages)) {
2110                                 rxcsum |= E1000_RXCSUM_IPPCSE;
2111                         }
2112                 } else {
2113                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2114                         /* don't need to clear IPPCSE as it defaults to 0 */
2115                 }
2116                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2117         }
2118
2119         /* enable early receives on 82573, only takes effect if using > 2048
2120          * byte total frame size.  for example only for jumbo frames */
2121 #define E1000_ERT_2048 0x100
2122         if (hw->mac_type == e1000_82573)
2123                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2124
2125         /* Enable Receives */
2126         E1000_WRITE_REG(hw, RCTL, rctl);
2127 }
2128
2129 /**
2130  * e1000_free_tx_resources - Free Tx Resources per Queue
2131  * @adapter: board private structure
2132  * @tx_ring: Tx descriptor ring for a specific queue
2133  *
2134  * Free all transmit software resources
2135  **/
2136
2137 static void
2138 e1000_free_tx_resources(struct e1000_adapter *adapter,
2139                         struct e1000_tx_ring *tx_ring)
2140 {
2141         struct pci_dev *pdev = adapter->pdev;
2142
2143         e1000_clean_tx_ring(adapter, tx_ring);
2144
2145         vfree(tx_ring->buffer_info);
2146         tx_ring->buffer_info = NULL;
2147
2148         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2149
2150         tx_ring->desc = NULL;
2151 }
2152
2153 /**
2154  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2155  * @adapter: board private structure
2156  *
2157  * Free all transmit software resources
2158  **/
2159
2160 void
2161 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2162 {
2163         int i;
2164
2165         for (i = 0; i < adapter->num_tx_queues; i++)
2166                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2167 }
2168
2169 static void
2170 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2171                         struct e1000_buffer *buffer_info)
2172 {
2173         if (buffer_info->dma) {
2174                 pci_unmap_page(adapter->pdev,
2175                                 buffer_info->dma,
2176                                 buffer_info->length,
2177                                 PCI_DMA_TODEVICE);
2178                 buffer_info->dma = 0;
2179         }
2180         if (buffer_info->skb) {
2181                 dev_kfree_skb_any(buffer_info->skb);
2182                 buffer_info->skb = NULL;
2183         }
2184         /* buffer_info must be completely set up in the transmit path */
2185 }
2186
2187 /**
2188  * e1000_clean_tx_ring - Free Tx Buffers
2189  * @adapter: board private structure
2190  * @tx_ring: ring to be cleaned
2191  **/
2192
2193 static void
2194 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2195                     struct e1000_tx_ring *tx_ring)
2196 {
2197         struct e1000_buffer *buffer_info;
2198         unsigned long size;
2199         unsigned int i;
2200
2201         /* Free all the Tx ring sk_buffs */
2202
2203         for (i = 0; i < tx_ring->count; i++) {
2204                 buffer_info = &tx_ring->buffer_info[i];
2205                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2206         }
2207
2208         size = sizeof(struct e1000_buffer) * tx_ring->count;
2209         memset(tx_ring->buffer_info, 0, size);
2210
2211         /* Zero out the descriptor ring */
2212
2213         memset(tx_ring->desc, 0, tx_ring->size);
2214
2215         tx_ring->next_to_use = 0;
2216         tx_ring->next_to_clean = 0;
2217         tx_ring->last_tx_tso = 0;
2218
2219         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2220         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2221 }
2222
2223 /**
2224  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2225  * @adapter: board private structure
2226  **/
2227
2228 static void
2229 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2230 {
2231         int i;
2232
2233         for (i = 0; i < adapter->num_tx_queues; i++)
2234                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2235 }
2236
2237 /**
2238  * e1000_free_rx_resources - Free Rx Resources
2239  * @adapter: board private structure
2240  * @rx_ring: ring to clean the resources from
2241  *
2242  * Free all receive software resources
2243  **/
2244
2245 static void
2246 e1000_free_rx_resources(struct e1000_adapter *adapter,
2247                         struct e1000_rx_ring *rx_ring)
2248 {
2249         struct pci_dev *pdev = adapter->pdev;
2250
2251         e1000_clean_rx_ring(adapter, rx_ring);
2252
2253         vfree(rx_ring->buffer_info);
2254         rx_ring->buffer_info = NULL;
2255         kfree(rx_ring->ps_page);
2256         rx_ring->ps_page = NULL;
2257         kfree(rx_ring->ps_page_dma);
2258         rx_ring->ps_page_dma = NULL;
2259
2260         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2261
2262         rx_ring->desc = NULL;
2263 }
2264
2265 /**
2266  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2267  * @adapter: board private structure
2268  *
2269  * Free all receive software resources
2270  **/
2271
2272 void
2273 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2274 {
2275         int i;
2276
2277         for (i = 0; i < adapter->num_rx_queues; i++)
2278                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2279 }
2280
2281 /**
2282  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2283  * @adapter: board private structure
2284  * @rx_ring: ring to free buffers from
2285  **/
2286
2287 static void
2288 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2289                     struct e1000_rx_ring *rx_ring)
2290 {
2291         struct e1000_buffer *buffer_info;
2292         struct e1000_ps_page *ps_page;
2293         struct e1000_ps_page_dma *ps_page_dma;
2294         struct pci_dev *pdev = adapter->pdev;
2295         unsigned long size;
2296         unsigned int i, j;
2297
2298         /* Free all the Rx ring sk_buffs */
2299         for (i = 0; i < rx_ring->count; i++) {
2300                 buffer_info = &rx_ring->buffer_info[i];
2301                 if (buffer_info->skb) {
2302                         pci_unmap_single(pdev,
2303                                          buffer_info->dma,
2304                                          buffer_info->length,
2305                                          PCI_DMA_FROMDEVICE);
2306
2307                         dev_kfree_skb(buffer_info->skb);
2308                         buffer_info->skb = NULL;
2309                 }
2310                 ps_page = &rx_ring->ps_page[i];
2311                 ps_page_dma = &rx_ring->ps_page_dma[i];
2312                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2313                         if (!ps_page->ps_page[j]) break;
2314                         pci_unmap_page(pdev,
2315                                        ps_page_dma->ps_page_dma[j],
2316                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2317                         ps_page_dma->ps_page_dma[j] = 0;
2318                         put_page(ps_page->ps_page[j]);
2319                         ps_page->ps_page[j] = NULL;
2320                 }
2321         }
2322
2323         size = sizeof(struct e1000_buffer) * rx_ring->count;
2324         memset(rx_ring->buffer_info, 0, size);
2325         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2326         memset(rx_ring->ps_page, 0, size);
2327         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2328         memset(rx_ring->ps_page_dma, 0, size);
2329
2330         /* Zero out the descriptor ring */
2331
2332         memset(rx_ring->desc, 0, rx_ring->size);
2333
2334         rx_ring->next_to_clean = 0;
2335         rx_ring->next_to_use = 0;
2336
2337         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2338         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2339 }
2340
2341 /**
2342  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2343  * @adapter: board private structure
2344  **/
2345
2346 static void
2347 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2348 {
2349         int i;
2350
2351         for (i = 0; i < adapter->num_rx_queues; i++)
2352                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2353 }
2354
2355 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2356  * and memory write and invalidate disabled for certain operations
2357  */
2358 static void
2359 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2360 {
2361         struct net_device *netdev = adapter->netdev;
2362         uint32_t rctl;
2363
2364         e1000_pci_clear_mwi(&adapter->hw);
2365
2366         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2367         rctl |= E1000_RCTL_RST;
2368         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2369         E1000_WRITE_FLUSH(&adapter->hw);
2370         mdelay(5);
2371
2372         if (netif_running(netdev))
2373                 e1000_clean_all_rx_rings(adapter);
2374 }
2375
2376 static void
2377 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2378 {
2379         struct net_device *netdev = adapter->netdev;
2380         uint32_t rctl;
2381
2382         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2383         rctl &= ~E1000_RCTL_RST;
2384         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2385         E1000_WRITE_FLUSH(&adapter->hw);
2386         mdelay(5);
2387
2388         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2389                 e1000_pci_set_mwi(&adapter->hw);
2390
2391         if (netif_running(netdev)) {
2392                 /* No need to loop, because 82542 supports only 1 queue */
2393                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2394                 e1000_configure_rx(adapter);
2395                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2396         }
2397 }
2398
2399 /**
2400  * e1000_set_mac - Change the Ethernet Address of the NIC
2401  * @netdev: network interface device structure
2402  * @p: pointer to an address structure
2403  *
2404  * Returns 0 on success, negative on failure
2405  **/
2406
2407 static int
2408 e1000_set_mac(struct net_device *netdev, void *p)
2409 {
2410         struct e1000_adapter *adapter = netdev_priv(netdev);
2411         struct sockaddr *addr = p;
2412
2413         if (!is_valid_ether_addr(addr->sa_data))
2414                 return -EADDRNOTAVAIL;
2415
2416         /* 82542 2.0 needs to be in reset to write receive address registers */
2417
2418         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2419                 e1000_enter_82542_rst(adapter);
2420
2421         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2422         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2423
2424         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2425
2426         /* With 82571 controllers, LAA may be overwritten (with the default)
2427          * due to controller reset from the other port. */
2428         if (adapter->hw.mac_type == e1000_82571) {
2429                 /* activate the work around */
2430                 adapter->hw.laa_is_present = 1;
2431
2432                 /* Hold a copy of the LAA in RAR[14] This is done so that
2433                  * between the time RAR[0] gets clobbered  and the time it
2434                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2435                  * of the RARs and no incoming packets directed to this port
2436                  * are dropped. Eventaully the LAA will be in RAR[0] and
2437                  * RAR[14] */
2438                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2439                                         E1000_RAR_ENTRIES - 1);
2440         }
2441
2442         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2443                 e1000_leave_82542_rst(adapter);
2444
2445         return 0;
2446 }
2447
2448 /**
2449  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2450  * @netdev: network interface device structure
2451  *
2452  * The set_rx_mode entry point is called whenever the unicast or multicast
2453  * address lists or the network interface flags are updated. This routine is
2454  * responsible for configuring the hardware for proper unicast, multicast,
2455  * promiscuous mode, and all-multi behavior.
2456  **/
2457
2458 static void
2459 e1000_set_rx_mode(struct net_device *netdev)
2460 {
2461         struct e1000_adapter *adapter = netdev_priv(netdev);
2462         struct e1000_hw *hw = &adapter->hw;
2463         struct dev_addr_list *uc_ptr;
2464         struct dev_addr_list *mc_ptr;
2465         uint32_t rctl;
2466         uint32_t hash_value;
2467         int i, rar_entries = E1000_RAR_ENTRIES;
2468         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2469                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2470                                 E1000_NUM_MTA_REGISTERS;
2471
2472         if (adapter->hw.mac_type == e1000_ich8lan)
2473                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2474
2475         /* reserve RAR[14] for LAA over-write work-around */
2476         if (adapter->hw.mac_type == e1000_82571)
2477                 rar_entries--;
2478
2479         /* Check for Promiscuous and All Multicast modes */
2480
2481         rctl = E1000_READ_REG(hw, RCTL);
2482
2483         if (netdev->flags & IFF_PROMISC) {
2484                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2485         } else if (netdev->flags & IFF_ALLMULTI) {
2486                 rctl |= E1000_RCTL_MPE;
2487         } else {
2488                 rctl &= ~E1000_RCTL_MPE;
2489         }
2490
2491         uc_ptr = NULL;
2492         if (netdev->uc_count > rar_entries - 1) {
2493                 rctl |= E1000_RCTL_UPE;
2494         } else if (!(netdev->flags & IFF_PROMISC)) {
2495                 rctl &= ~E1000_RCTL_UPE;
2496                 uc_ptr = netdev->uc_list;
2497         }
2498
2499         E1000_WRITE_REG(hw, RCTL, rctl);
2500
2501         /* 82542 2.0 needs to be in reset to write receive address registers */
2502
2503         if (hw->mac_type == e1000_82542_rev2_0)
2504                 e1000_enter_82542_rst(adapter);
2505
2506         /* load the first 14 addresses into the exact filters 1-14. Unicast
2507          * addresses take precedence to avoid disabling unicast filtering
2508          * when possible.
2509          *
2510          * RAR 0 is used for the station MAC adddress
2511          * if there are not 14 addresses, go ahead and clear the filters
2512          * -- with 82571 controllers only 0-13 entries are filled here
2513          */
2514         mc_ptr = netdev->mc_list;
2515
2516         for (i = 1; i < rar_entries; i++) {
2517                 if (uc_ptr) {
2518                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2519                         uc_ptr = uc_ptr->next;
2520                 } else if (mc_ptr) {
2521                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2522                         mc_ptr = mc_ptr->next;
2523                 } else {
2524                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2525                         E1000_WRITE_FLUSH(hw);
2526                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2527                         E1000_WRITE_FLUSH(hw);
2528                 }
2529         }
2530         WARN_ON(uc_ptr != NULL);
2531
2532         /* clear the old settings from the multicast hash table */
2533
2534         for (i = 0; i < mta_reg_count; i++) {
2535                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2536                 E1000_WRITE_FLUSH(hw);
2537         }
2538
2539         /* load any remaining addresses into the hash table */
2540
2541         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2542                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2543                 e1000_mta_set(hw, hash_value);
2544         }
2545
2546         if (hw->mac_type == e1000_82542_rev2_0)
2547                 e1000_leave_82542_rst(adapter);
2548 }
2549
2550 /* Need to wait a few seconds after link up to get diagnostic information from
2551  * the phy */
2552
2553 static void
2554 e1000_update_phy_info(unsigned long data)
2555 {
2556         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2557         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2558 }
2559
2560 /**
2561  * e1000_82547_tx_fifo_stall - Timer Call-back
2562  * @data: pointer to adapter cast into an unsigned long
2563  **/
2564
2565 static void
2566 e1000_82547_tx_fifo_stall(unsigned long data)
2567 {
2568         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2569         struct net_device *netdev = adapter->netdev;
2570         uint32_t tctl;
2571
2572         if (atomic_read(&adapter->tx_fifo_stall)) {
2573                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2574                     E1000_READ_REG(&adapter->hw, TDH)) &&
2575                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2576                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2577                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2578                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2579                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2580                         E1000_WRITE_REG(&adapter->hw, TCTL,
2581                                         tctl & ~E1000_TCTL_EN);
2582                         E1000_WRITE_REG(&adapter->hw, TDFT,
2583                                         adapter->tx_head_addr);
2584                         E1000_WRITE_REG(&adapter->hw, TDFH,
2585                                         adapter->tx_head_addr);
2586                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2587                                         adapter->tx_head_addr);
2588                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2589                                         adapter->tx_head_addr);
2590                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2591                         E1000_WRITE_FLUSH(&adapter->hw);
2592
2593                         adapter->tx_fifo_head = 0;
2594                         atomic_set(&adapter->tx_fifo_stall, 0);
2595                         netif_wake_queue(netdev);
2596                 } else {
2597                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2598                 }
2599         }
2600 }
2601
2602 /**
2603  * e1000_watchdog - Timer Call-back
2604  * @data: pointer to adapter cast into an unsigned long
2605  **/
2606 static void
2607 e1000_watchdog(unsigned long data)
2608 {
2609         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2610         struct net_device *netdev = adapter->netdev;
2611         struct e1000_tx_ring *txdr = adapter->tx_ring;
2612         uint32_t link, tctl;
2613         int32_t ret_val;
2614
2615         ret_val = e1000_check_for_link(&adapter->hw);
2616         if ((ret_val == E1000_ERR_PHY) &&
2617             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2618             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2619                 /* See e1000_kumeran_lock_loss_workaround() */
2620                 DPRINTK(LINK, INFO,
2621                         "Gigabit has been disabled, downgrading speed\n");
2622         }
2623
2624         if (adapter->hw.mac_type == e1000_82573) {
2625                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2626                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2627                         e1000_update_mng_vlan(adapter);
2628         }
2629
2630         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2631            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2632                 link = !adapter->hw.serdes_link_down;
2633         else
2634                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2635
2636         if (link) {
2637                 if (!netif_carrier_ok(netdev)) {
2638                         uint32_t ctrl;
2639                         boolean_t txb2b = 1;
2640                         e1000_get_speed_and_duplex(&adapter->hw,
2641                                                    &adapter->link_speed,
2642                                                    &adapter->link_duplex);
2643
2644                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2645                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2646                                 "Flow Control: %s\n",
2647                                 adapter->link_speed,
2648                                 adapter->link_duplex == FULL_DUPLEX ?
2649                                 "Full Duplex" : "Half Duplex",
2650                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2651                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2652                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2653                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2654
2655                         /* tweak tx_queue_len according to speed/duplex
2656                          * and adjust the timeout factor */
2657                         netdev->tx_queue_len = adapter->tx_queue_len;
2658                         adapter->tx_timeout_factor = 1;
2659                         switch (adapter->link_speed) {
2660                         case SPEED_10:
2661                                 txb2b = 0;
2662                                 netdev->tx_queue_len = 10;
2663                                 adapter->tx_timeout_factor = 8;
2664                                 break;
2665                         case SPEED_100:
2666                                 txb2b = 0;
2667                                 netdev->tx_queue_len = 100;
2668                                 /* maybe add some timeout factor ? */
2669                                 break;
2670                         }
2671
2672                         if ((adapter->hw.mac_type == e1000_82571 ||
2673                              adapter->hw.mac_type == e1000_82572) &&
2674                             txb2b == 0) {
2675                                 uint32_t tarc0;
2676                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2677                                 tarc0 &= ~(1 << 21);
2678                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2679                         }
2680
2681                         /* disable TSO for pcie and 10/100 speeds, to avoid
2682                          * some hardware issues */
2683                         if (!adapter->tso_force &&
2684                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2685                                 switch (adapter->link_speed) {
2686                                 case SPEED_10:
2687                                 case SPEED_100:
2688                                         DPRINTK(PROBE,INFO,
2689                                         "10/100 speed: disabling TSO\n");
2690                                         netdev->features &= ~NETIF_F_TSO;
2691                                         netdev->features &= ~NETIF_F_TSO6;
2692                                         break;
2693                                 case SPEED_1000:
2694                                         netdev->features |= NETIF_F_TSO;
2695                                         netdev->features |= NETIF_F_TSO6;
2696                                         break;
2697                                 default:
2698                                         /* oops */
2699                                         break;
2700                                 }
2701                         }
2702
2703                         /* enable transmits in the hardware, need to do this
2704                          * after setting TARC0 */
2705                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2706                         tctl |= E1000_TCTL_EN;
2707                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2708
2709                         netif_carrier_on(netdev);
2710                         netif_wake_queue(netdev);
2711                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2712                         adapter->smartspeed = 0;
2713                 } else {
2714                         /* make sure the receive unit is started */
2715                         if (adapter->hw.rx_needs_kicking) {
2716                                 struct e1000_hw *hw = &adapter->hw;
2717                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2718                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2719                         }
2720                 }
2721         } else {
2722                 if (netif_carrier_ok(netdev)) {
2723                         adapter->link_speed = 0;
2724                         adapter->link_duplex = 0;
2725                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2726                         netif_carrier_off(netdev);
2727                         netif_stop_queue(netdev);
2728                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2729
2730                         /* 80003ES2LAN workaround--
2731                          * For packet buffer work-around on link down event;
2732                          * disable receives in the ISR and
2733                          * reset device here in the watchdog
2734                          */
2735                         if (adapter->hw.mac_type == e1000_80003es2lan)
2736                                 /* reset device */
2737                                 schedule_work(&adapter->reset_task);
2738                 }
2739
2740                 e1000_smartspeed(adapter);
2741         }
2742
2743         e1000_update_stats(adapter);
2744
2745         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2746         adapter->tpt_old = adapter->stats.tpt;
2747         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2748         adapter->colc_old = adapter->stats.colc;
2749
2750         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2751         adapter->gorcl_old = adapter->stats.gorcl;
2752         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2753         adapter->gotcl_old = adapter->stats.gotcl;
2754
2755         e1000_update_adaptive(&adapter->hw);
2756
2757         if (!netif_carrier_ok(netdev)) {
2758                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2759                         /* We've lost link, so the controller stops DMA,
2760                          * but we've got queued Tx work that's never going
2761                          * to get done, so reset controller to flush Tx.
2762                          * (Do the reset outside of interrupt context). */
2763                         adapter->tx_timeout_count++;
2764                         schedule_work(&adapter->reset_task);
2765                 }
2766         }
2767
2768         /* Cause software interrupt to ensure rx ring is cleaned */
2769         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2770
2771         /* Force detection of hung controller every watchdog period */
2772         adapter->detect_tx_hung = TRUE;
2773
2774         /* With 82571 controllers, LAA may be overwritten due to controller
2775          * reset from the other port. Set the appropriate LAA in RAR[0] */
2776         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2777                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2778
2779         /* Reset the timer */
2780         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2781 }
2782
2783 enum latency_range {
2784         lowest_latency = 0,
2785         low_latency = 1,
2786         bulk_latency = 2,
2787         latency_invalid = 255
2788 };
2789
2790 /**
2791  * e1000_update_itr - update the dynamic ITR value based on statistics
2792  *      Stores a new ITR value based on packets and byte
2793  *      counts during the last interrupt.  The advantage of per interrupt
2794  *      computation is faster updates and more accurate ITR for the current
2795  *      traffic pattern.  Constants in this function were computed
2796  *      based on theoretical maximum wire speed and thresholds were set based
2797  *      on testing data as well as attempting to minimize response time
2798  *      while increasing bulk throughput.
2799  *      this functionality is controlled by the InterruptThrottleRate module
2800  *      parameter (see e1000_param.c)
2801  * @adapter: pointer to adapter
2802  * @itr_setting: current adapter->itr
2803  * @packets: the number of packets during this measurement interval
2804  * @bytes: the number of bytes during this measurement interval
2805  **/
2806 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2807                                    uint16_t itr_setting,
2808                                    int packets,
2809                                    int bytes)
2810 {
2811         unsigned int retval = itr_setting;
2812         struct e1000_hw *hw = &adapter->hw;
2813
2814         if (unlikely(hw->mac_type < e1000_82540))
2815                 goto update_itr_done;
2816
2817         if (packets == 0)
2818                 goto update_itr_done;
2819
2820         switch (itr_setting) {
2821         case lowest_latency:
2822                 /* jumbo frames get bulk treatment*/
2823                 if (bytes/packets > 8000)
2824                         retval = bulk_latency;
2825                 else if ((packets < 5) && (bytes > 512))
2826                         retval = low_latency;
2827                 break;
2828         case low_latency:  /* 50 usec aka 20000 ints/s */
2829                 if (bytes > 10000) {
2830                         /* jumbo frames need bulk latency setting */
2831                         if (bytes/packets > 8000)
2832                                 retval = bulk_latency;
2833                         else if ((packets < 10) || ((bytes/packets) > 1200))
2834                                 retval = bulk_latency;
2835                         else if ((packets > 35))
2836                                 retval = lowest_latency;
2837                 } else if (bytes/packets > 2000)
2838                         retval = bulk_latency;
2839                 else if (packets <= 2 && bytes < 512)
2840                         retval = lowest_latency;
2841                 break;
2842         case bulk_latency: /* 250 usec aka 4000 ints/s */
2843                 if (bytes > 25000) {
2844                         if (packets > 35)
2845                                 retval = low_latency;
2846                 } else if (bytes < 6000) {
2847                         retval = low_latency;
2848                 }
2849                 break;
2850         }
2851
2852 update_itr_done:
2853         return retval;
2854 }
2855
2856 static void e1000_set_itr(struct e1000_adapter *adapter)
2857 {
2858         struct e1000_hw *hw = &adapter->hw;
2859         uint16_t current_itr;
2860         uint32_t new_itr = adapter->itr;
2861
2862         if (unlikely(hw->mac_type < e1000_82540))
2863                 return;
2864
2865         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2866         if (unlikely(adapter->link_speed != SPEED_1000)) {
2867                 current_itr = 0;
2868                 new_itr = 4000;
2869                 goto set_itr_now;
2870         }
2871
2872         adapter->tx_itr = e1000_update_itr(adapter,
2873                                     adapter->tx_itr,
2874                                     adapter->total_tx_packets,
2875                                     adapter->total_tx_bytes);
2876         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2877         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2878                 adapter->tx_itr = low_latency;
2879
2880         adapter->rx_itr = e1000_update_itr(adapter,
2881                                     adapter->rx_itr,
2882                                     adapter->total_rx_packets,
2883                                     adapter->total_rx_bytes);
2884         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2885         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2886                 adapter->rx_itr = low_latency;
2887
2888         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2889
2890         switch (current_itr) {
2891         /* counts and packets in update_itr are dependent on these numbers */
2892         case lowest_latency:
2893                 new_itr = 70000;
2894                 break;
2895         case low_latency:
2896                 new_itr = 20000; /* aka hwitr = ~200 */
2897                 break;
2898         case bulk_latency:
2899                 new_itr = 4000;
2900                 break;
2901         default:
2902                 break;
2903         }
2904
2905 set_itr_now:
2906         if (new_itr != adapter->itr) {
2907                 /* this attempts to bias the interrupt rate towards Bulk
2908                  * by adding intermediate steps when interrupt rate is
2909                  * increasing */
2910                 new_itr = new_itr > adapter->itr ?
2911                              min(adapter->itr + (new_itr >> 2), new_itr) :
2912                              new_itr;
2913                 adapter->itr = new_itr;
2914                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2915         }
2916
2917         return;
2918 }
2919
2920 #define E1000_TX_FLAGS_CSUM             0x00000001
2921 #define E1000_TX_FLAGS_VLAN             0x00000002
2922 #define E1000_TX_FLAGS_TSO              0x00000004
2923 #define E1000_TX_FLAGS_IPV4             0x00000008
2924 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2925 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2926
2927 static int
2928 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2929           struct sk_buff *skb)
2930 {
2931         struct e1000_context_desc *context_desc;
2932         struct e1000_buffer *buffer_info;
2933         unsigned int i;
2934         uint32_t cmd_length = 0;
2935         uint16_t ipcse = 0, tucse, mss;
2936         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2937         int err;
2938
2939         if (skb_is_gso(skb)) {
2940                 if (skb_header_cloned(skb)) {
2941                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2942                         if (err)
2943                                 return err;
2944                 }
2945
2946                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2947                 mss = skb_shinfo(skb)->gso_size;
2948                 if (skb->protocol == htons(ETH_P_IP)) {
2949                         struct iphdr *iph = ip_hdr(skb);
2950                         iph->tot_len = 0;
2951                         iph->check = 0;
2952                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2953                                                                  iph->daddr, 0,
2954                                                                  IPPROTO_TCP,
2955                                                                  0);
2956                         cmd_length = E1000_TXD_CMD_IP;
2957                         ipcse = skb_transport_offset(skb) - 1;
2958                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2959                         ipv6_hdr(skb)->payload_len = 0;
2960                         tcp_hdr(skb)->check =
2961                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2962                                                  &ipv6_hdr(skb)->daddr,
2963                                                  0, IPPROTO_TCP, 0);
2964                         ipcse = 0;
2965                 }
2966                 ipcss = skb_network_offset(skb);
2967                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2968                 tucss = skb_transport_offset(skb);
2969                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2970                 tucse = 0;
2971
2972                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2973                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2974
2975                 i = tx_ring->next_to_use;
2976                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2977                 buffer_info = &tx_ring->buffer_info[i];
2978
2979                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2980                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2981                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2982                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2983                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2984                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2985                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2986                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2987                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2988
2989                 buffer_info->time_stamp = jiffies;
2990                 buffer_info->next_to_watch = i;
2991
2992                 if (++i == tx_ring->count) i = 0;
2993                 tx_ring->next_to_use = i;
2994
2995                 return TRUE;
2996         }
2997         return FALSE;
2998 }
2999
3000 static boolean_t
3001 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3002               struct sk_buff *skb)
3003 {
3004         struct e1000_context_desc *context_desc;
3005         struct e1000_buffer *buffer_info;
3006         unsigned int i;
3007         uint8_t css;
3008
3009         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
3010                 css = skb_transport_offset(skb);
3011
3012                 i = tx_ring->next_to_use;
3013                 buffer_info = &tx_ring->buffer_info[i];
3014                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3015
3016                 context_desc->lower_setup.ip_config = 0;
3017                 context_desc->upper_setup.tcp_fields.tucss = css;
3018                 context_desc->upper_setup.tcp_fields.tucso =
3019                         css + skb->csum_offset;
3020                 context_desc->upper_setup.tcp_fields.tucse = 0;
3021                 context_desc->tcp_seg_setup.data = 0;
3022                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
3023
3024                 buffer_info->time_stamp = jiffies;
3025                 buffer_info->next_to_watch = i;
3026
3027                 if (unlikely(++i == tx_ring->count)) i = 0;
3028                 tx_ring->next_to_use = i;
3029
3030                 return TRUE;
3031         }
3032
3033         return FALSE;
3034 }
3035
3036 #define E1000_MAX_TXD_PWR       12
3037 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
3038
3039 static int
3040 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3041              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
3042              unsigned int nr_frags, unsigned int mss)
3043 {
3044         struct e1000_buffer *buffer_info;
3045         unsigned int len = skb->len;
3046         unsigned int offset = 0, size, count = 0, i;
3047         unsigned int f;
3048         len -= skb->data_len;
3049
3050         i = tx_ring->next_to_use;
3051
3052         while (len) {
3053                 buffer_info = &tx_ring->buffer_info[i];
3054                 size = min(len, max_per_txd);
3055                 /* Workaround for Controller erratum --
3056                  * descriptor for non-tso packet in a linear SKB that follows a
3057                  * tso gets written back prematurely before the data is fully
3058                  * DMA'd to the controller */
3059                 if (!skb->data_len && tx_ring->last_tx_tso &&
3060                     !skb_is_gso(skb)) {
3061                         tx_ring->last_tx_tso = 0;
3062                         size -= 4;
3063                 }
3064
3065                 /* Workaround for premature desc write-backs
3066                  * in TSO mode.  Append 4-byte sentinel desc */
3067                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3068                         size -= 4;
3069                 /* work-around for errata 10 and it applies
3070                  * to all controllers in PCI-X mode
3071                  * The fix is to make sure that the first descriptor of a
3072                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3073                  */
3074                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3075                                 (size > 2015) && count == 0))
3076                         size = 2015;
3077
3078                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3079                  * terminating buffers within evenly-aligned dwords. */
3080                 if (unlikely(adapter->pcix_82544 &&
3081                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3082                    size > 4))
3083                         size -= 4;
3084
3085                 buffer_info->length = size;
3086                 buffer_info->dma =
3087                         pci_map_single(adapter->pdev,
3088                                 skb->data + offset,
3089                                 size,
3090                                 PCI_DMA_TODEVICE);
3091                 buffer_info->time_stamp = jiffies;
3092                 buffer_info->next_to_watch = i;
3093
3094                 len -= size;
3095                 offset += size;
3096                 count++;
3097                 if (unlikely(++i == tx_ring->count)) i = 0;
3098         }
3099
3100         for (f = 0; f < nr_frags; f++) {
3101                 struct skb_frag_struct *frag;
3102
3103                 frag = &skb_shinfo(skb)->frags[f];
3104                 len = frag->size;
3105                 offset = frag->page_offset;
3106
3107                 while (len) {
3108                         buffer_info = &tx_ring->buffer_info[i];
3109                         size = min(len, max_per_txd);
3110                         /* Workaround for premature desc write-backs
3111                          * in TSO mode.  Append 4-byte sentinel desc */
3112                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3113                                 size -= 4;
3114                         /* Workaround for potential 82544 hang in PCI-X.
3115                          * Avoid terminating buffers within evenly-aligned
3116                          * dwords. */
3117                         if (unlikely(adapter->pcix_82544 &&
3118                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3119                            size > 4))
3120                                 size -= 4;
3121
3122                         buffer_info->length = size;
3123                         buffer_info->dma =
3124                                 pci_map_page(adapter->pdev,
3125                                         frag->page,
3126                                         offset,
3127                                         size,
3128                                         PCI_DMA_TODEVICE);
3129                         buffer_info->time_stamp = jiffies;
3130                         buffer_info->next_to_watch = i;
3131
3132                         len -= size;
3133                         offset += size;
3134                         count++;
3135                         if (unlikely(++i == tx_ring->count)) i = 0;
3136                 }
3137         }
3138
3139         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3140         tx_ring->buffer_info[i].skb = skb;
3141         tx_ring->buffer_info[first].next_to_watch = i;
3142
3143         return count;
3144 }
3145
3146 static void
3147 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3148                int tx_flags, int count)
3149 {
3150         struct e1000_tx_desc *tx_desc = NULL;
3151         struct e1000_buffer *buffer_info;
3152         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3153         unsigned int i;
3154
3155         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3156                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3157                              E1000_TXD_CMD_TSE;
3158                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3159
3160                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3161                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3162         }
3163
3164         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3165                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3166                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3167         }
3168
3169         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3170                 txd_lower |= E1000_TXD_CMD_VLE;
3171                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3172         }
3173
3174         i = tx_ring->next_to_use;
3175
3176         while (count--) {
3177                 buffer_info = &tx_ring->buffer_info[i];
3178                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3179                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3180                 tx_desc->lower.data =
3181                         cpu_to_le32(txd_lower | buffer_info->length);
3182                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3183                 if (unlikely(++i == tx_ring->count)) i = 0;
3184         }
3185
3186         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3187
3188         /* Force memory writes to complete before letting h/w
3189          * know there are new descriptors to fetch.  (Only
3190          * applicable for weak-ordered memory model archs,
3191          * such as IA-64). */
3192         wmb();
3193
3194         tx_ring->next_to_use = i;
3195         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3196         /* we need this if more than one processor can write to our tail
3197          * at a time, it syncronizes IO on IA64/Altix systems */
3198         mmiowb();
3199 }
3200
3201 /**
3202  * 82547 workaround to avoid controller hang in half-duplex environment.
3203  * The workaround is to avoid queuing a large packet that would span
3204  * the internal Tx FIFO ring boundary by notifying the stack to resend
3205  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3206  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3207  * to the beginning of the Tx FIFO.
3208  **/
3209
3210 #define E1000_FIFO_HDR                  0x10
3211 #define E1000_82547_PAD_LEN             0x3E0
3212
3213 static int
3214 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3215 {
3216         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3217         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3218
3219         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3220
3221         if (adapter->link_duplex != HALF_DUPLEX)
3222                 goto no_fifo_stall_required;
3223
3224         if (atomic_read(&adapter->tx_fifo_stall))
3225                 return 1;
3226
3227         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3228                 atomic_set(&adapter->tx_fifo_stall, 1);
3229                 return 1;
3230         }
3231
3232 no_fifo_stall_required:
3233         adapter->tx_fifo_head += skb_fifo_len;
3234         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3235                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3236         return 0;
3237 }
3238
3239 #define MINIMUM_DHCP_PACKET_SIZE 282
3240 static int
3241 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3242 {
3243         struct e1000_hw *hw =  &adapter->hw;
3244         uint16_t length, offset;
3245         if (vlan_tx_tag_present(skb)) {
3246                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3247                         ( adapter->hw.mng_cookie.status &
3248                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3249                         return 0;
3250         }
3251         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3252                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3253                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3254                         const struct iphdr *ip =
3255                                 (struct iphdr *)((uint8_t *)skb->data+14);
3256                         if (IPPROTO_UDP == ip->protocol) {
3257                                 struct udphdr *udp =
3258                                         (struct udphdr *)((uint8_t *)ip +
3259                                                 (ip->ihl << 2));
3260                                 if (ntohs(udp->dest) == 67) {
3261                                         offset = (uint8_t *)udp + 8 - skb->data;
3262                                         length = skb->len - offset;
3263
3264                                         return e1000_mng_write_dhcp_info(hw,
3265                                                         (uint8_t *)udp + 8,
3266                                                         length);
3267                                 }
3268                         }
3269                 }
3270         }
3271         return 0;
3272 }
3273
3274 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3275 {
3276         struct e1000_adapter *adapter = netdev_priv(netdev);
3277         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3278
3279         netif_stop_queue(netdev);
3280         /* Herbert's original patch had:
3281          *  smp_mb__after_netif_stop_queue();
3282          * but since that doesn't exist yet, just open code it. */
3283         smp_mb();
3284
3285         /* We need to check again in a case another CPU has just
3286          * made room available. */
3287         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3288                 return -EBUSY;
3289
3290         /* A reprieve! */
3291         netif_start_queue(netdev);
3292         ++adapter->restart_queue;
3293         return 0;
3294 }
3295
3296 static int e1000_maybe_stop_tx(struct net_device *netdev,
3297                                struct e1000_tx_ring *tx_ring, int size)
3298 {
3299         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3300                 return 0;
3301         return __e1000_maybe_stop_tx(netdev, size);
3302 }
3303
3304 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3305 static int
3306 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3307 {
3308         struct e1000_adapter *adapter = netdev_priv(netdev);
3309         struct e1000_tx_ring *tx_ring;
3310         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3311         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3312         unsigned int tx_flags = 0;
3313         unsigned int len = skb->len - skb->data_len;
3314         unsigned long flags;
3315         unsigned int nr_frags;
3316         unsigned int mss;
3317         int count = 0;
3318         int tso;
3319         unsigned int f;
3320
3321         /* This goes back to the question of how to logically map a tx queue
3322          * to a flow.  Right now, performance is impacted slightly negatively
3323          * if using multiple tx queues.  If the stack breaks away from a
3324          * single qdisc implementation, we can look at this again. */
3325         tx_ring = adapter->tx_ring;
3326
3327         if (unlikely(skb->len <= 0)) {
3328                 dev_kfree_skb_any(skb);
3329                 return NETDEV_TX_OK;
3330         }
3331
3332         /* 82571 and newer doesn't need the workaround that limited descriptor
3333          * length to 4kB */
3334         if (adapter->hw.mac_type >= e1000_82571)
3335                 max_per_txd = 8192;
3336
3337         mss = skb_shinfo(skb)->gso_size;
3338         /* The controller does a simple calculation to
3339          * make sure there is enough room in the FIFO before
3340          * initiating the DMA for each buffer.  The calc is:
3341          * 4 = ceil(buffer len/mss).  To make sure we don't
3342          * overrun the FIFO, adjust the max buffer len if mss
3343          * drops. */
3344         if (mss) {
3345                 uint8_t hdr_len;
3346                 max_per_txd = min(mss << 2, max_per_txd);
3347                 max_txd_pwr = fls(max_per_txd) - 1;
3348
3349                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3350                 * points to just header, pull a few bytes of payload from
3351                 * frags into skb->data */
3352                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3353                 if (skb->data_len && hdr_len == len) {
3354                         switch (adapter->hw.mac_type) {
3355                                 unsigned int pull_size;
3356                         case e1000_82544:
3357                                 /* Make sure we have room to chop off 4 bytes,
3358                                  * and that the end alignment will work out to
3359                                  * this hardware's requirements
3360                                  * NOTE: this is a TSO only workaround
3361                                  * if end byte alignment not correct move us
3362                                  * into the next dword */
3363                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3364                                         break;
3365                                 /* fall through */
3366                         case e1000_82571:
3367                         case e1000_82572:
3368                         case e1000_82573:
3369                         case e1000_ich8lan:
3370                                 pull_size = min((unsigned int)4, skb->data_len);
3371                                 if (!__pskb_pull_tail(skb, pull_size)) {
3372                                         DPRINTK(DRV, ERR,
3373                                                 "__pskb_pull_tail failed.\n");
3374                                         dev_kfree_skb_any(skb);
3375                                         return NETDEV_TX_OK;
3376                                 }
3377                                 len = skb->len - skb->data_len;
3378                                 break;
3379                         default:
3380                                 /* do nothing */
3381                                 break;
3382                         }
3383                 }
3384         }
3385
3386         /* reserve a descriptor for the offload context */
3387         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3388                 count++;
3389         count++;
3390
3391         /* Controller Erratum workaround */
3392         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3393                 count++;
3394
3395         count += TXD_USE_COUNT(len, max_txd_pwr);
3396
3397         if (adapter->pcix_82544)
3398                 count++;
3399
3400         /* work-around for errata 10 and it applies to all controllers
3401          * in PCI-X mode, so add one more descriptor to the count
3402          */
3403         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3404                         (len > 2015)))
3405                 count++;
3406
3407         nr_frags = skb_shinfo(skb)->nr_frags;
3408         for (f = 0; f < nr_frags; f++)
3409                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3410                                        max_txd_pwr);
3411         if (adapter->pcix_82544)
3412                 count += nr_frags;
3413
3414
3415         if (adapter->hw.tx_pkt_filtering &&
3416             (adapter->hw.mac_type == e1000_82573))
3417                 e1000_transfer_dhcp_info(adapter, skb);
3418
3419         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3420                 /* Collision - tell upper layer to requeue */
3421                 return NETDEV_TX_LOCKED;
3422
3423         /* need: count + 2 desc gap to keep tail from touching
3424          * head, otherwise try next time */
3425         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3426                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3427                 return NETDEV_TX_BUSY;
3428         }
3429
3430         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3431                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3432                         netif_stop_queue(netdev);
3433                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3434                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3435                         return NETDEV_TX_BUSY;
3436                 }
3437         }
3438
3439         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3440                 tx_flags |= E1000_TX_FLAGS_VLAN;
3441                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3442         }
3443
3444         first = tx_ring->next_to_use;
3445
3446         tso = e1000_tso(adapter, tx_ring, skb);
3447         if (tso < 0) {
3448                 dev_kfree_skb_any(skb);
3449                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3450                 return NETDEV_TX_OK;
3451         }
3452
3453         if (likely(tso)) {
3454                 tx_ring->last_tx_tso = 1;
3455                 tx_flags |= E1000_TX_FLAGS_TSO;
3456         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3457                 tx_flags |= E1000_TX_FLAGS_CSUM;
3458
3459         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3460          * 82571 hardware supports TSO capabilities for IPv6 as well...
3461          * no longer assume, we must. */
3462         if (likely(skb->protocol == htons(ETH_P_IP)))
3463                 tx_flags |= E1000_TX_FLAGS_IPV4;
3464
3465         e1000_tx_queue(adapter, tx_ring, tx_flags,
3466                        e1000_tx_map(adapter, tx_ring, skb, first,
3467                                     max_per_txd, nr_frags, mss));
3468
3469         netdev->trans_start = jiffies;
3470
3471         /* Make sure there is space in the ring for the next send. */
3472         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3473
3474         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3475         return NETDEV_TX_OK;
3476 }
3477
3478 /**
3479  * e1000_tx_timeout - Respond to a Tx Hang
3480  * @netdev: network interface device structure
3481  **/
3482
3483 static void
3484 e1000_tx_timeout(struct net_device *netdev)
3485 {
3486         struct e1000_adapter *adapter = netdev_priv(netdev);
3487
3488         /* Do the reset outside of interrupt context */
3489         adapter->tx_timeout_count++;
3490         schedule_work(&adapter->reset_task);
3491 }
3492
3493 static void
3494 e1000_reset_task(struct work_struct *work)
3495 {
3496         struct e1000_adapter *adapter =
3497                 container_of(work, struct e1000_adapter, reset_task);
3498
3499         e1000_reinit_locked(adapter);
3500 }
3501
3502 /**
3503  * e1000_get_stats - Get System Network Statistics
3504  * @netdev: network interface device structure
3505  *
3506  * Returns the address of the device statistics structure.
3507  * The statistics are actually updated from the timer callback.
3508  **/
3509
3510 static struct net_device_stats *
3511 e1000_get_stats(struct net_device *netdev)
3512 {
3513         struct e1000_adapter *adapter = netdev_priv(netdev);
3514
3515         /* only return the current stats */
3516         return &adapter->net_stats;
3517 }
3518
3519 /**
3520  * e1000_change_mtu - Change the Maximum Transfer Unit
3521  * @netdev: network interface device structure
3522  * @new_mtu: new value for maximum frame size
3523  *
3524  * Returns 0 on success, negative on failure
3525  **/
3526
3527 static int
3528 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3529 {
3530         struct e1000_adapter *adapter = netdev_priv(netdev);
3531         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3532         uint16_t eeprom_data = 0;
3533
3534         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3535             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3536                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3537                 return -EINVAL;
3538         }
3539
3540         /* Adapter-specific max frame size limits. */
3541         switch (adapter->hw.mac_type) {
3542         case e1000_undefined ... e1000_82542_rev2_1:
3543         case e1000_ich8lan:
3544                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3545                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3546                         return -EINVAL;
3547                 }
3548                 break;
3549         case e1000_82573:
3550                 /* Jumbo Frames not supported if:
3551                  * - this is not an 82573L device
3552                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3553                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3554                                   &eeprom_data);
3555                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3556                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3557                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3558                                 DPRINTK(PROBE, ERR,
3559                                         "Jumbo Frames not supported.\n");
3560                                 return -EINVAL;
3561                         }
3562                         break;
3563                 }
3564                 /* ERT will be enabled later to enable wire speed receives */
3565
3566                 /* fall through to get support */
3567         case e1000_82571:
3568         case e1000_82572:
3569         case e1000_80003es2lan:
3570 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3571                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3572                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3573                         return -EINVAL;
3574                 }
3575                 break;
3576         default:
3577                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3578                 break;
3579         }
3580
3581         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3582          * means we reserve 2 more, this pushes us to allocate from the next
3583          * larger slab size
3584          * i.e. RXBUFFER_2048 --> size-4096 slab */
3585
3586         if (max_frame <= E1000_RXBUFFER_256)
3587                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3588         else if (max_frame <= E1000_RXBUFFER_512)
3589                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3590         else if (max_frame <= E1000_RXBUFFER_1024)
3591                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3592         else if (max_frame <= E1000_RXBUFFER_2048)
3593                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3594         else if (max_frame <= E1000_RXBUFFER_4096)
3595                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3596         else if (max_frame <= E1000_RXBUFFER_8192)
3597                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3598         else if (max_frame <= E1000_RXBUFFER_16384)
3599                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3600
3601         /* adjust allocation if LPE protects us, and we aren't using SBP */
3602         if (!adapter->hw.tbi_compatibility_on &&
3603             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3604              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3605                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3606
3607         netdev->mtu = new_mtu;
3608         adapter->hw.max_frame_size = max_frame;
3609
3610         if (netif_running(netdev))
3611                 e1000_reinit_locked(adapter);
3612
3613         return 0;
3614 }
3615
3616 /**
3617  * e1000_update_stats - Update the board statistics counters
3618  * @adapter: board private structure
3619  **/
3620
3621 void
3622 e1000_update_stats(struct e1000_adapter *adapter)
3623 {
3624         struct e1000_hw *hw = &adapter->hw;
3625         struct pci_dev *pdev = adapter->pdev;
3626         unsigned long flags;
3627         uint16_t phy_tmp;
3628
3629 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3630
3631         /*
3632          * Prevent stats update while adapter is being reset, or if the pci
3633          * connection is down.
3634          */
3635         if (adapter->link_speed == 0)
3636                 return;
3637         if (pci_channel_offline(pdev))
3638                 return;
3639
3640         spin_lock_irqsave(&adapter->stats_lock, flags);
3641
3642         /* these counters are modified from e1000_tbi_adjust_stats,
3643          * called from the interrupt context, so they must only
3644          * be written while holding adapter->stats_lock
3645          */
3646
3647         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3648         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3649         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3650         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3651         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3652         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3653         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3654
3655         if (adapter->hw.mac_type != e1000_ich8lan) {
3656                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3657                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3658                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3659                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3660                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3661                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3662         }
3663
3664         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3665         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3666         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3667         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3668         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3669         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3670         adapter->stats.dc += E1000_READ_REG(hw, DC);
3671         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3672         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3673         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3674         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3675         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3676         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3677         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3678         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3679         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3680         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3681         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3682         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3683         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3684         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3685         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3686         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3687         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3688         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3689         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3690
3691         if (adapter->hw.mac_type != e1000_ich8lan) {
3692                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3693                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3694                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3695                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3696                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3697                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3698         }
3699
3700         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3701         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3702
3703         /* used for adaptive IFS */
3704
3705         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3706         adapter->stats.tpt += hw->tx_packet_delta;
3707         hw->collision_delta = E1000_READ_REG(hw, COLC);
3708         adapter->stats.colc += hw->collision_delta;
3709
3710         if (hw->mac_type >= e1000_82543) {
3711                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3712                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3713                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3714                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3715                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3716                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3717         }
3718         if (hw->mac_type > e1000_82547_rev_2) {
3719                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3720                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3721
3722                 if (adapter->hw.mac_type != e1000_ich8lan) {
3723                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3724                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3725                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3726                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3727                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3728                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3729                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3730                 }
3731         }
3732
3733         /* Fill out the OS statistics structure */
3734         adapter->net_stats.multicast = adapter->stats.mprc;
3735         adapter->net_stats.collisions = adapter->stats.colc;
3736
3737         /* Rx Errors */
3738
3739         /* RLEC on some newer hardware can be incorrect so build
3740         * our own version based on RUC and ROC */
3741         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3742                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3743                 adapter->stats.ruc + adapter->stats.roc +
3744                 adapter->stats.cexterr;
3745         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3746         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3747         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3748         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3749         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3750
3751         /* Tx Errors */
3752         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3753         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3754         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3755         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3756         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3757         if (adapter->hw.bad_tx_carr_stats_fd &&
3758             adapter->link_duplex == FULL_DUPLEX) {
3759                 adapter->net_stats.tx_carrier_errors = 0;
3760                 adapter->stats.tncrs = 0;
3761         }
3762
3763         /* Tx Dropped needs to be maintained elsewhere */
3764
3765         /* Phy Stats */
3766         if (hw->media_type == e1000_media_type_copper) {
3767                 if ((adapter->link_speed == SPEED_1000) &&
3768                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3769                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3770                         adapter->phy_stats.idle_errors += phy_tmp;
3771                 }
3772
3773                 if ((hw->mac_type <= e1000_82546) &&
3774                    (hw->phy_type == e1000_phy_m88) &&
3775                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3776                         adapter->phy_stats.receive_errors += phy_tmp;
3777         }
3778
3779         /* Management Stats */
3780         if (adapter->hw.has_smbus) {
3781                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3782                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3783                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3784         }
3785
3786         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3787 }
3788
3789 /**
3790  * e1000_intr_msi - Interrupt Handler
3791  * @irq: interrupt number
3792  * @data: pointer to a network interface device structure
3793  **/
3794
3795 static irqreturn_t
3796 e1000_intr_msi(int irq, void *data)
3797 {
3798         struct net_device *netdev = data;
3799         struct e1000_adapter *adapter = netdev_priv(netdev);
3800         struct e1000_hw *hw = &adapter->hw;
3801 #ifndef CONFIG_E1000_NAPI
3802         int i;
3803 #endif
3804         uint32_t icr = E1000_READ_REG(hw, ICR);
3805
3806 #ifdef CONFIG_E1000_NAPI
3807         /* read ICR disables interrupts using IAM, so keep up with our
3808          * enable/disable accounting */
3809         atomic_inc(&adapter->irq_sem);
3810 #endif
3811         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3812                 hw->get_link_status = 1;
3813                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3814                  * link down event; disable receives here in the ISR and reset
3815                  * adapter in watchdog */
3816                 if (netif_carrier_ok(netdev) &&
3817                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3818                         /* disable receives */
3819                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3820                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3821                 }
3822                 /* guard against interrupt when we're going down */
3823                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3824                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3825         }
3826
3827 #ifdef CONFIG_E1000_NAPI
3828         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3829                 adapter->total_tx_bytes = 0;
3830                 adapter->total_tx_packets = 0;
3831                 adapter->total_rx_bytes = 0;
3832                 adapter->total_rx_packets = 0;
3833                 __netif_rx_schedule(netdev, &adapter->napi);
3834         } else
3835                 e1000_irq_enable(adapter);
3836 #else
3837         adapter->total_tx_bytes = 0;
3838         adapter->total_rx_bytes = 0;
3839         adapter->total_tx_packets = 0;
3840         adapter->total_rx_packets = 0;
3841
3842         for (i = 0; i < E1000_MAX_INTR; i++)
3843                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3844                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3845                         break;
3846
3847         if (likely(adapter->itr_setting & 3))
3848                 e1000_set_itr(adapter);
3849 #endif
3850
3851         return IRQ_HANDLED;
3852 }
3853
3854 /**
3855  * e1000_intr - Interrupt Handler
3856  * @irq: interrupt number
3857  * @data: pointer to a network interface device structure
3858  **/
3859
3860 static irqreturn_t
3861 e1000_intr(int irq, void *data)
3862 {
3863         struct net_device *netdev = data;
3864         struct e1000_adapter *adapter = netdev_priv(netdev);
3865         struct e1000_hw *hw = &adapter->hw;
3866         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3867 #ifndef CONFIG_E1000_NAPI
3868         int i;
3869 #endif
3870         if (unlikely(!icr))
3871                 return IRQ_NONE;  /* Not our interrupt */
3872
3873 #ifdef CONFIG_E1000_NAPI
3874         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3875          * not set, then the adapter didn't send an interrupt */
3876         if (unlikely(hw->mac_type >= e1000_82571 &&
3877                      !(icr & E1000_ICR_INT_ASSERTED)))
3878                 return IRQ_NONE;
3879
3880         /* Interrupt Auto-Mask...upon reading ICR,
3881          * interrupts are masked.  No need for the
3882          * IMC write, but it does mean we should
3883          * account for it ASAP. */
3884         if (likely(hw->mac_type >= e1000_82571))
3885                 atomic_inc(&adapter->irq_sem);
3886 #endif
3887
3888         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3889                 hw->get_link_status = 1;
3890                 /* 80003ES2LAN workaround--
3891                  * For packet buffer work-around on link down event;
3892                  * disable receives here in the ISR and
3893                  * reset adapter in watchdog
3894                  */
3895                 if (netif_carrier_ok(netdev) &&
3896                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3897                         /* disable receives */
3898                         rctl = E1000_READ_REG(hw, RCTL);
3899                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3900                 }
3901                 /* guard against interrupt when we're going down */
3902                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3903                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3904         }
3905
3906 #ifdef CONFIG_E1000_NAPI
3907         if (unlikely(hw->mac_type < e1000_82571)) {
3908                 /* disable interrupts, without the synchronize_irq bit */
3909                 atomic_inc(&adapter->irq_sem);
3910                 E1000_WRITE_REG(hw, IMC, ~0);
3911                 E1000_WRITE_FLUSH(hw);
3912         }
3913         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3914                 adapter->total_tx_bytes = 0;
3915                 adapter->total_tx_packets = 0;
3916                 adapter->total_rx_bytes = 0;
3917                 adapter->total_rx_packets = 0;
3918                 __netif_rx_schedule(netdev, &adapter->napi);
3919         } else
3920                 /* this really should not happen! if it does it is basically a
3921                  * bug, but not a hard error, so enable ints and continue */
3922                 e1000_irq_enable(adapter);
3923 #else
3924         /* Writing IMC and IMS is needed for 82547.
3925          * Due to Hub Link bus being occupied, an interrupt
3926          * de-assertion message is not able to be sent.
3927          * When an interrupt assertion message is generated later,
3928          * two messages are re-ordered and sent out.
3929          * That causes APIC to think 82547 is in de-assertion
3930          * state, while 82547 is in assertion state, resulting
3931          * in dead lock. Writing IMC forces 82547 into
3932          * de-assertion state.
3933          */
3934         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3935                 atomic_inc(&adapter->irq_sem);
3936                 E1000_WRITE_REG(hw, IMC, ~0);
3937         }
3938
3939         adapter->total_tx_bytes = 0;
3940         adapter->total_rx_bytes = 0;
3941         adapter->total_tx_packets = 0;
3942         adapter->total_rx_packets = 0;
3943
3944         for (i = 0; i < E1000_MAX_INTR; i++)
3945                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3946                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3947                         break;
3948
3949         if (likely(adapter->itr_setting & 3))
3950                 e1000_set_itr(adapter);
3951
3952         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3953                 e1000_irq_enable(adapter);
3954
3955 #endif
3956         return IRQ_HANDLED;
3957 }
3958
3959 #ifdef CONFIG_E1000_NAPI
3960 /**
3961  * e1000_clean - NAPI Rx polling callback
3962  * @adapter: board private structure
3963  **/
3964
3965 static int
3966 e1000_clean(struct napi_struct *napi, int budget)
3967 {
3968         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3969         struct net_device *poll_dev = adapter->netdev;
3970         int tx_cleaned = 0, work_done = 0;
3971
3972         /* Must NOT use netdev_priv macro here. */
3973         adapter = poll_dev->priv;
3974
3975         /* e1000_clean is called per-cpu.  This lock protects
3976          * tx_ring[0] from being cleaned by multiple cpus
3977          * simultaneously.  A failure obtaining the lock means
3978          * tx_ring[0] is currently being cleaned anyway. */
3979         if (spin_trylock(&adapter->tx_queue_lock)) {
3980                 tx_cleaned = e1000_clean_tx_irq(adapter,
3981                                                 &adapter->tx_ring[0]);
3982                 spin_unlock(&adapter->tx_queue_lock);
3983         }
3984
3985         adapter->clean_rx(adapter, &adapter->rx_ring[0],
3986                           &work_done, budget);
3987
3988         if (tx_cleaned)
3989                 work_done = budget;
3990
3991         /* If budget not fully consumed, exit the polling mode */
3992         if (work_done < budget) {
3993                 if (likely(adapter->itr_setting & 3))
3994                         e1000_set_itr(adapter);
3995                 netif_rx_complete(poll_dev, napi);
3996                 e1000_irq_enable(adapter);
3997         }
3998
3999         return work_done;
4000 }
4001
4002 #endif
4003 /**
4004  * e1000_clean_tx_irq - Reclaim resources after transmit completes
4005  * @adapter: board private structure
4006  **/
4007
4008 static boolean_t
4009 e1000_clean_tx_irq(struct e1000_adapter *adapter,
4010                    struct e1000_tx_ring *tx_ring)
4011 {
4012         struct net_device *netdev = adapter->netdev;
4013         struct e1000_tx_desc *tx_desc, *eop_desc;
4014         struct e1000_buffer *buffer_info;
4015         unsigned int i, eop;
4016 #ifdef CONFIG_E1000_NAPI
4017         unsigned int count = 0;
4018 #endif
4019         boolean_t cleaned = FALSE;
4020         unsigned int total_tx_bytes=0, total_tx_packets=0;
4021
4022         i = tx_ring->next_to_clean;
4023         eop = tx_ring->buffer_info[i].next_to_watch;
4024         eop_desc = E1000_TX_DESC(*tx_ring, eop);
4025
4026         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
4027                 for (cleaned = FALSE; !cleaned; ) {
4028                         tx_desc = E1000_TX_DESC(*tx_ring, i);
4029                         buffer_info = &tx_ring->buffer_info[i];
4030                         cleaned = (i == eop);
4031
4032                         if (cleaned) {
4033                                 struct sk_buff *skb = buffer_info->skb;
4034                                 unsigned int segs, bytecount;
4035                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
4036                                 /* multiply data chunks by size of headers */
4037                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
4038                                             skb->len;
4039                                 total_tx_packets += segs;
4040                                 total_tx_bytes += bytecount;
4041                         }
4042                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4043                         tx_desc->upper.data = 0;
4044
4045                         if (unlikely(++i == tx_ring->count)) i = 0;
4046                 }
4047
4048                 eop = tx_ring->buffer_info[i].next_to_watch;
4049                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4050 #ifdef CONFIG_E1000_NAPI
4051 #define E1000_TX_WEIGHT 64
4052                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4053                 if (count++ == E1000_TX_WEIGHT) break;
4054 #endif
4055         }
4056
4057         tx_ring->next_to_clean = i;
4058
4059 #define TX_WAKE_THRESHOLD 32
4060         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4061                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4062                 /* Make sure that anybody stopping the queue after this
4063                  * sees the new next_to_clean.
4064                  */
4065                 smp_mb();
4066                 if (netif_queue_stopped(netdev)) {
4067                         netif_wake_queue(netdev);
4068                         ++adapter->restart_queue;
4069                 }
4070         }
4071
4072         if (adapter->detect_tx_hung) {
4073                 /* Detect a transmit hang in hardware, this serializes the
4074                  * check with the clearing of time_stamp and movement of i */
4075                 adapter->detect_tx_hung = FALSE;
4076                 if (tx_ring->buffer_info[eop].dma &&
4077                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4078                                (adapter->tx_timeout_factor * HZ))
4079                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4080                          E1000_STATUS_TXOFF)) {
4081
4082                         /* detected Tx unit hang */
4083                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4084                                         "  Tx Queue             <%lu>\n"
4085                                         "  TDH                  <%x>\n"
4086                                         "  TDT                  <%x>\n"
4087                                         "  next_to_use          <%x>\n"
4088                                         "  next_to_clean        <%x>\n"
4089                                         "buffer_info[next_to_clean]\n"
4090                                         "  time_stamp           <%lx>\n"
4091                                         "  next_to_watch        <%x>\n"
4092                                         "  jiffies              <%lx>\n"
4093                                         "  next_to_watch.status <%x>\n",
4094                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4095                                         sizeof(struct e1000_tx_ring)),
4096                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4097                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4098                                 tx_ring->next_to_use,
4099                                 tx_ring->next_to_clean,
4100                                 tx_ring->buffer_info[eop].time_stamp,
4101                                 eop,
4102                                 jiffies,
4103                                 eop_desc->upper.fields.status);
4104                         netif_stop_queue(netdev);
4105                 }
4106         }
4107         adapter->total_tx_bytes += total_tx_bytes;
4108         adapter->total_tx_packets += total_tx_packets;
4109         adapter->net_stats.tx_bytes += total_tx_bytes;
4110         adapter->net_stats.tx_packets += total_tx_packets;
4111         return cleaned;
4112 }
4113
4114 /**
4115  * e1000_rx_checksum - Receive Checksum Offload for 82543
4116  * @adapter:     board private structure
4117  * @status_err:  receive descriptor status and error fields
4118  * @csum:        receive descriptor csum field
4119  * @sk_buff:     socket buffer with received data
4120  **/
4121
4122 static void
4123 e1000_rx_checksum(struct e1000_adapter *adapter,
4124                   uint32_t status_err, uint32_t csum,
4125                   struct sk_buff *skb)
4126 {
4127         uint16_t status = (uint16_t)status_err;
4128         uint8_t errors = (uint8_t)(status_err >> 24);
4129         skb->ip_summed = CHECKSUM_NONE;
4130
4131         /* 82543 or newer only */
4132         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4133         /* Ignore Checksum bit is set */
4134         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4135         /* TCP/UDP checksum error bit is set */
4136         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4137                 /* let the stack verify checksum errors */
4138                 adapter->hw_csum_err++;
4139                 return;
4140         }
4141         /* TCP/UDP Checksum has not been calculated */
4142         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4143                 if (!(status & E1000_RXD_STAT_TCPCS))
4144                         return;
4145         } else {
4146                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4147                         return;
4148         }
4149         /* It must be a TCP or UDP packet with a valid checksum */
4150         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4151                 /* TCP checksum is good */
4152                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4153         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4154                 /* IP fragment with UDP payload */
4155                 /* Hardware complements the payload checksum, so we undo it
4156                  * and then put the value in host order for further stack use.
4157                  */
4158                 __sum16 sum = (__force __sum16)htons(csum);
4159                 skb->csum = csum_unfold(~sum);
4160                 skb->ip_summed = CHECKSUM_COMPLETE;
4161         }
4162         adapter->hw_csum_good++;
4163 }
4164
4165 /**
4166  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4167  * @adapter: board private structure
4168  **/
4169
4170 static boolean_t
4171 #ifdef CONFIG_E1000_NAPI
4172 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4173                    struct e1000_rx_ring *rx_ring,
4174                    int *work_done, int work_to_do)
4175 #else
4176 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4177                    struct e1000_rx_ring *rx_ring)
4178 #endif
4179 {
4180         struct net_device *netdev = adapter->netdev;
4181         struct pci_dev *pdev = adapter->pdev;
4182         struct e1000_rx_desc *rx_desc, *next_rxd;
4183         struct e1000_buffer *buffer_info, *next_buffer;
4184         unsigned long flags;
4185         uint32_t length;
4186         uint8_t last_byte;
4187         unsigned int i;
4188         int cleaned_count = 0;
4189         boolean_t cleaned = FALSE;
4190         unsigned int total_rx_bytes=0, total_rx_packets=0;
4191
4192         i = rx_ring->next_to_clean;
4193         rx_desc = E1000_RX_DESC(*rx_ring, i);
4194         buffer_info = &rx_ring->buffer_info[i];
4195
4196         while (rx_desc->status & E1000_RXD_STAT_DD) {
4197                 struct sk_buff *skb;
4198                 u8 status;
4199
4200 #ifdef CONFIG_E1000_NAPI
4201                 if (*work_done >= work_to_do)
4202                         break;
4203                 (*work_done)++;
4204 #endif
4205                 status = rx_desc->status;
4206                 skb = buffer_info->skb;
4207                 buffer_info->skb = NULL;
4208
4209                 prefetch(skb->data - NET_IP_ALIGN);
4210
4211                 if (++i == rx_ring->count) i = 0;
4212                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4213                 prefetch(next_rxd);
4214
4215                 next_buffer = &rx_ring->buffer_info[i];
4216
4217                 cleaned = TRUE;
4218                 cleaned_count++;
4219                 pci_unmap_single(pdev,
4220                                  buffer_info->dma,
4221                                  buffer_info->length,
4222                                  PCI_DMA_FROMDEVICE);
4223
4224                 length = le16_to_cpu(rx_desc->length);
4225
4226                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4227                         /* All receives must fit into a single buffer */
4228                         E1000_DBG("%s: Receive packet consumed multiple"
4229                                   " buffers\n", netdev->name);
4230                         /* recycle */
4231                         buffer_info->skb = skb;
4232                         goto next_desc;
4233                 }
4234
4235                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4236                         last_byte = *(skb->data + length - 1);
4237                         if (TBI_ACCEPT(&adapter->hw, status,
4238                                       rx_desc->errors, length, last_byte)) {
4239                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4240                                 e1000_tbi_adjust_stats(&adapter->hw,
4241                                                        &adapter->stats,
4242                                                        length, skb->data);
4243                                 spin_unlock_irqrestore(&adapter->stats_lock,
4244                                                        flags);
4245                                 length--;
4246                         } else {
4247                                 /* recycle */
4248                                 buffer_info->skb = skb;
4249                                 goto next_desc;
4250                         }
4251                 }
4252
4253                 /* adjust length to remove Ethernet CRC, this must be
4254                  * done after the TBI_ACCEPT workaround above */
4255                 length -= 4;
4256
4257                 /* probably a little skewed due to removing CRC */
4258                 total_rx_bytes += length;
4259                 total_rx_packets++;
4260
4261                 /* code added for copybreak, this should improve
4262                  * performance for small packets with large amounts
4263                  * of reassembly being done in the stack */
4264                 if (length < copybreak) {
4265                         struct sk_buff *new_skb =
4266                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4267                         if (new_skb) {
4268                                 skb_reserve(new_skb, NET_IP_ALIGN);
4269                                 skb_copy_to_linear_data_offset(new_skb,
4270                                                                -NET_IP_ALIGN,
4271                                                                (skb->data -
4272                                                                 NET_IP_ALIGN),
4273                                                                (length +
4274                                                                 NET_IP_ALIGN));
4275                                 /* save the skb in buffer_info as good */
4276                                 buffer_info->skb = skb;
4277                                 skb = new_skb;
4278                         }
4279                         /* else just continue with the old one */
4280                 }
4281                 /* end copybreak code */
4282                 skb_put(skb, length);
4283
4284                 /* Receive Checksum Offload */
4285                 e1000_rx_checksum(adapter,
4286                                   (uint32_t)(status) |
4287                                   ((uint32_t)(rx_desc->errors) << 24),
4288                                   le16_to_cpu(rx_desc->csum), skb);
4289
4290                 skb->protocol = eth_type_trans(skb, netdev);
4291 #ifdef CONFIG_E1000_NAPI
4292                 if (unlikely(adapter->vlgrp &&
4293                             (status & E1000_RXD_STAT_VP))) {
4294                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4295                                                  le16_to_cpu(rx_desc->special) &
4296                                                  E1000_RXD_SPC_VLAN_MASK);
4297                 } else {
4298                         netif_receive_skb(skb);
4299                 }
4300 #else /* CONFIG_E1000_NAPI */
4301                 if (unlikely(adapter->vlgrp &&
4302                             (status & E1000_RXD_STAT_VP))) {
4303                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4304                                         le16_to_cpu(rx_desc->special) &
4305                                         E1000_RXD_SPC_VLAN_MASK);
4306                 } else {
4307                         netif_rx(skb);
4308                 }
4309 #endif /* CONFIG_E1000_NAPI */
4310                 netdev->last_rx = jiffies;
4311
4312 next_desc:
4313                 rx_desc->status = 0;
4314
4315                 /* return some buffers to hardware, one at a time is too slow */
4316                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4317                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4318                         cleaned_count = 0;
4319                 }
4320
4321                 /* use prefetched values */
4322                 rx_desc = next_rxd;
4323                 buffer_info = next_buffer;
4324         }
4325         rx_ring->next_to_clean = i;
4326
4327         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4328         if (cleaned_count)
4329                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4330
4331         adapter->total_rx_packets += total_rx_packets;
4332         adapter->total_rx_bytes += total_rx_bytes;
4333         adapter->net_stats.rx_bytes += total_rx_bytes;
4334         adapter->net_stats.rx_packets += total_rx_packets;
4335         return cleaned;
4336 }
4337
4338 /**
4339  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4340  * @adapter: board private structure
4341  **/
4342
4343 static boolean_t
4344 #ifdef CONFIG_E1000_NAPI
4345 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4346                       struct e1000_rx_ring *rx_ring,
4347                       int *work_done, int work_to_do)
4348 #else
4349 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4350                       struct e1000_rx_ring *rx_ring)
4351 #endif
4352 {
4353         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4354         struct net_device *netdev = adapter->netdev;
4355         struct pci_dev *pdev = adapter->pdev;
4356         struct e1000_buffer *buffer_info, *next_buffer;
4357         struct e1000_ps_page *ps_page;
4358         struct e1000_ps_page_dma *ps_page_dma;
4359         struct sk_buff *skb;
4360         unsigned int i, j;
4361         uint32_t length, staterr;
4362         int cleaned_count = 0;
4363         boolean_t cleaned = FALSE;
4364         unsigned int total_rx_bytes=0, total_rx_packets=0;
4365
4366         i = rx_ring->next_to_clean;
4367         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4368         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4369         buffer_info = &rx_ring->buffer_info[i];
4370
4371         while (staterr & E1000_RXD_STAT_DD) {
4372                 ps_page = &rx_ring->ps_page[i];
4373                 ps_page_dma = &rx_ring->ps_page_dma[i];
4374 #ifdef CONFIG_E1000_NAPI
4375                 if (unlikely(*work_done >= work_to_do))
4376                         break;
4377                 (*work_done)++;
4378 #endif
4379                 skb = buffer_info->skb;
4380
4381                 /* in the packet split case this is header only */
4382                 prefetch(skb->data - NET_IP_ALIGN);
4383
4384                 if (++i == rx_ring->count) i = 0;
4385                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4386                 prefetch(next_rxd);
4387
4388                 next_buffer = &rx_ring->buffer_info[i];
4389
4390                 cleaned = TRUE;
4391                 cleaned_count++;
4392                 pci_unmap_single(pdev, buffer_info->dma,
4393                                  buffer_info->length,
4394                                  PCI_DMA_FROMDEVICE);
4395
4396                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4397                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4398                                   " the full packet\n", netdev->name);
4399                         dev_kfree_skb_irq(skb);
4400                         goto next_desc;
4401                 }
4402
4403                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4404                         dev_kfree_skb_irq(skb);
4405                         goto next_desc;
4406                 }
4407
4408                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4409
4410                 if (unlikely(!length)) {
4411                         E1000_DBG("%s: Last part of the packet spanning"
4412                                   " multiple descriptors\n", netdev->name);
4413                         dev_kfree_skb_irq(skb);
4414                         goto next_desc;
4415                 }
4416
4417                 /* Good Receive */
4418                 skb_put(skb, length);
4419
4420                 {
4421                 /* this looks ugly, but it seems compiler issues make it
4422                    more efficient than reusing j */
4423                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4424
4425                 /* page alloc/put takes too long and effects small packet
4426                  * throughput, so unsplit small packets and save the alloc/put*/
4427                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4428                         u8 *vaddr;
4429                         /* there is no documentation about how to call
4430                          * kmap_atomic, so we can't hold the mapping
4431                          * very long */
4432                         pci_dma_sync_single_for_cpu(pdev,
4433                                 ps_page_dma->ps_page_dma[0],
4434                                 PAGE_SIZE,
4435                                 PCI_DMA_FROMDEVICE);
4436                         vaddr = kmap_atomic(ps_page->ps_page[0],
4437                                             KM_SKB_DATA_SOFTIRQ);
4438                         memcpy(skb_tail_pointer(skb), vaddr, l1);
4439                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4440                         pci_dma_sync_single_for_device(pdev,
4441                                 ps_page_dma->ps_page_dma[0],
4442                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4443                         /* remove the CRC */
4444                         l1 -= 4;
4445                         skb_put(skb, l1);
4446                         goto copydone;
4447                 } /* if */
4448                 }
4449
4450                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4451                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4452                                 break;
4453                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4454                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4455                         ps_page_dma->ps_page_dma[j] = 0;
4456                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4457                                            length);
4458                         ps_page->ps_page[j] = NULL;
4459                         skb->len += length;
4460                         skb->data_len += length;
4461                         skb->truesize += length;
4462                 }
4463
4464                 /* strip the ethernet crc, problem is we're using pages now so
4465                  * this whole operation can get a little cpu intensive */
4466                 pskb_trim(skb, skb->len - 4);
4467
4468 copydone:
4469                 total_rx_bytes += skb->len;
4470                 total_rx_packets++;
4471
4472                 e1000_rx_checksum(adapter, staterr,
4473                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4474                 skb->protocol = eth_type_trans(skb, netdev);
4475
4476                 if (likely(rx_desc->wb.upper.header_status &
4477                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4478                         adapter->rx_hdr_split++;
4479 #ifdef CONFIG_E1000_NAPI
4480                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4481                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4482                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4483                                 E1000_RXD_SPC_VLAN_MASK);
4484                 } else {
4485                         netif_receive_skb(skb);
4486                 }
4487 #else /* CONFIG_E1000_NAPI */
4488                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4489                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4490                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4491                                 E1000_RXD_SPC_VLAN_MASK);
4492                 } else {
4493                         netif_rx(skb);
4494                 }
4495 #endif /* CONFIG_E1000_NAPI */
4496                 netdev->last_rx = jiffies;
4497
4498 next_desc:
4499                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4500                 buffer_info->skb = NULL;
4501
4502                 /* return some buffers to hardware, one at a time is too slow */
4503                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4504                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4505                         cleaned_count = 0;
4506                 }
4507
4508                 /* use prefetched values */
4509                 rx_desc = next_rxd;
4510                 buffer_info = next_buffer;
4511
4512                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4513         }
4514         rx_ring->next_to_clean = i;
4515
4516         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4517         if (cleaned_count)
4518                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4519
4520         adapter->total_rx_packets += total_rx_packets;
4521         adapter->total_rx_bytes += total_rx_bytes;
4522         adapter->net_stats.rx_bytes += total_rx_bytes;
4523         adapter->net_stats.rx_packets += total_rx_packets;
4524         return cleaned;
4525 }
4526
4527 /**
4528  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4529  * @adapter: address of board private structure
4530  **/
4531
4532 static void
4533 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4534                        struct e1000_rx_ring *rx_ring,
4535                        int cleaned_count)
4536 {
4537         struct net_device *netdev = adapter->netdev;
4538         struct pci_dev *pdev = adapter->pdev;
4539         struct e1000_rx_desc *rx_desc;
4540         struct e1000_buffer *buffer_info;
4541         struct sk_buff *skb;
4542         unsigned int i;
4543         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4544
4545         i = rx_ring->next_to_use;
4546         buffer_info = &rx_ring->buffer_info[i];
4547
4548         while (cleaned_count--) {
4549                 skb = buffer_info->skb;
4550                 if (skb) {
4551                         skb_trim(skb, 0);
4552                         goto map_skb;
4553                 }
4554
4555                 skb = netdev_alloc_skb(netdev, bufsz);
4556                 if (unlikely(!skb)) {
4557                         /* Better luck next round */
4558                         adapter->alloc_rx_buff_failed++;
4559                         break;
4560                 }
4561
4562                 /* Fix for errata 23, can't cross 64kB boundary */
4563                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4564                         struct sk_buff *oldskb = skb;
4565                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4566                                              "at %p\n", bufsz, skb->data);
4567                         /* Try again, without freeing the previous */
4568                         skb = netdev_alloc_skb(netdev, bufsz);
4569                         /* Failed allocation, critical failure */
4570                         if (!skb) {
4571                                 dev_kfree_skb(oldskb);
4572                                 break;
4573                         }
4574
4575                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4576                                 /* give up */
4577                                 dev_kfree_skb(skb);
4578                                 dev_kfree_skb(oldskb);
4579                                 break; /* while !buffer_info->skb */
4580                         }
4581
4582                         /* Use new allocation */
4583                         dev_kfree_skb(oldskb);
4584                 }
4585                 /* Make buffer alignment 2 beyond a 16 byte boundary
4586                  * this will result in a 16 byte aligned IP header after
4587                  * the 14 byte MAC header is removed
4588                  */
4589                 skb_reserve(skb, NET_IP_ALIGN);
4590
4591                 buffer_info->skb = skb;
4592                 buffer_info->length = adapter->rx_buffer_len;
4593 map_skb:
4594                 buffer_info->dma = pci_map_single(pdev,
4595                                                   skb->data,
4596                                                   adapter->rx_buffer_len,
4597                                                   PCI_DMA_FROMDEVICE);
4598
4599                 /* Fix for errata 23, can't cross 64kB boundary */
4600                 if (!e1000_check_64k_bound(adapter,
4601                                         (void *)(unsigned long)buffer_info->dma,
4602                                         adapter->rx_buffer_len)) {
4603                         DPRINTK(RX_ERR, ERR,
4604                                 "dma align check failed: %u bytes at %p\n",
4605                                 adapter->rx_buffer_len,
4606                                 (void *)(unsigned long)buffer_info->dma);
4607                         dev_kfree_skb(skb);
4608                         buffer_info->skb = NULL;
4609
4610                         pci_unmap_single(pdev, buffer_info->dma,
4611                                          adapter->rx_buffer_len,
4612                                          PCI_DMA_FROMDEVICE);
4613
4614                         break; /* while !buffer_info->skb */
4615                 }
4616                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4617                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4618
4619                 if (unlikely(++i == rx_ring->count))
4620                         i = 0;
4621                 buffer_info = &rx_ring->buffer_info[i];
4622         }
4623
4624         if (likely(rx_ring->next_to_use != i)) {
4625                 rx_ring->next_to_use = i;
4626                 if (unlikely(i-- == 0))
4627                         i = (rx_ring->count - 1);
4628
4629                 /* Force memory writes to complete before letting h/w
4630                  * know there are new descriptors to fetch.  (Only
4631                  * applicable for weak-ordered memory model archs,
4632                  * such as IA-64). */
4633                 wmb();
4634                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4635         }
4636 }
4637
4638 /**
4639  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4640  * @adapter: address of board private structure
4641  **/
4642
4643 static void
4644 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4645                           struct e1000_rx_ring *rx_ring,
4646                           int cleaned_count)
4647 {
4648         struct net_device *netdev = adapter->netdev;
4649         struct pci_dev *pdev = adapter->pdev;
4650         union e1000_rx_desc_packet_split *rx_desc;
4651         struct e1000_buffer *buffer_info;
4652         struct e1000_ps_page *ps_page;
4653         struct e1000_ps_page_dma *ps_page_dma;
4654         struct sk_buff *skb;
4655         unsigned int i, j;
4656
4657         i = rx_ring->next_to_use;
4658         buffer_info = &rx_ring->buffer_info[i];
4659         ps_page = &rx_ring->ps_page[i];
4660         ps_page_dma = &rx_ring->ps_page_dma[i];
4661
4662         while (cleaned_count--) {
4663                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4664
4665                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4666                         if (j < adapter->rx_ps_pages) {
4667                                 if (likely(!ps_page->ps_page[j])) {
4668                                         ps_page->ps_page[j] =
4669                                                 alloc_page(GFP_ATOMIC);
4670                                         if (unlikely(!ps_page->ps_page[j])) {
4671                                                 adapter->alloc_rx_buff_failed++;
4672                                                 goto no_buffers;
4673                                         }
4674                                         ps_page_dma->ps_page_dma[j] =
4675                                                 pci_map_page(pdev,
4676                                                             ps_page->ps_page[j],
4677                                                             0, PAGE_SIZE,
4678                                                             PCI_DMA_FROMDEVICE);
4679                                 }
4680                                 /* Refresh the desc even if buffer_addrs didn't
4681                                  * change because each write-back erases
4682                                  * this info.
4683                                  */
4684                                 rx_desc->read.buffer_addr[j+1] =
4685                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4686                         } else
4687                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4688                 }
4689
4690                 skb = netdev_alloc_skb(netdev,
4691                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4692
4693                 if (unlikely(!skb)) {
4694                         adapter->alloc_rx_buff_failed++;
4695                         break;
4696                 }
4697
4698                 /* Make buffer alignment 2 beyond a 16 byte boundary
4699                  * this will result in a 16 byte aligned IP header after
4700                  * the 14 byte MAC header is removed
4701                  */
4702                 skb_reserve(skb, NET_IP_ALIGN);
4703
4704                 buffer_info->skb = skb;
4705                 buffer_info->length = adapter->rx_ps_bsize0;
4706                 buffer_info->dma = pci_map_single(pdev, skb->data,
4707                                                   adapter->rx_ps_bsize0,
4708                                                   PCI_DMA_FROMDEVICE);
4709
4710                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4711
4712                 if (unlikely(++i == rx_ring->count)) i = 0;
4713                 buffer_info = &rx_ring->buffer_info[i];
4714                 ps_page = &rx_ring->ps_page[i];
4715                 ps_page_dma = &rx_ring->ps_page_dma[i];
4716         }
4717
4718 no_buffers:
4719         if (likely(rx_ring->next_to_use != i)) {
4720                 rx_ring->next_to_use = i;
4721                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4722
4723                 /* Force memory writes to complete before letting h/w
4724                  * know there are new descriptors to fetch.  (Only
4725                  * applicable for weak-ordered memory model archs,
4726                  * such as IA-64). */
4727                 wmb();
4728                 /* Hardware increments by 16 bytes, but packet split
4729                  * descriptors are 32 bytes...so we increment tail
4730                  * twice as much.
4731                  */
4732                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4733         }
4734 }
4735
4736 /**
4737  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4738  * @adapter:
4739  **/
4740
4741 static void
4742 e1000_smartspeed(struct e1000_adapter *adapter)
4743 {
4744         uint16_t phy_status;
4745         uint16_t phy_ctrl;
4746
4747         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4748            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4749                 return;
4750
4751         if (adapter->smartspeed == 0) {
4752                 /* If Master/Slave config fault is asserted twice,
4753                  * we assume back-to-back */
4754                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4755                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4756                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4757                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4758                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4759                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4760                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4761                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4762                                             phy_ctrl);
4763                         adapter->smartspeed++;
4764                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4765                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4766                                                &phy_ctrl)) {
4767                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4768                                              MII_CR_RESTART_AUTO_NEG);
4769                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4770                                                     phy_ctrl);
4771                         }
4772                 }
4773                 return;
4774         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4775                 /* If still no link, perhaps using 2/3 pair cable */
4776                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4777                 phy_ctrl |= CR_1000T_MS_ENABLE;
4778                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4779                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4780                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4781                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4782                                      MII_CR_RESTART_AUTO_NEG);
4783                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4784                 }
4785         }
4786         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4787         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4788                 adapter->smartspeed = 0;
4789 }
4790
4791 /**
4792  * e1000_ioctl -
4793  * @netdev:
4794  * @ifreq:
4795  * @cmd:
4796  **/
4797
4798 static int
4799 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4800 {
4801         switch (cmd) {
4802         case SIOCGMIIPHY:
4803         case SIOCGMIIREG:
4804         case SIOCSMIIREG:
4805                 return e1000_mii_ioctl(netdev, ifr, cmd);
4806         default:
4807                 return -EOPNOTSUPP;
4808         }
4809 }
4810
4811 /**
4812  * e1000_mii_ioctl -
4813  * @netdev:
4814  * @ifreq:
4815  * @cmd:
4816  **/
4817
4818 static int
4819 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4820 {
4821         struct e1000_adapter *adapter = netdev_priv(netdev);
4822         struct mii_ioctl_data *data = if_mii(ifr);
4823         int retval;
4824         uint16_t mii_reg;
4825         uint16_t spddplx;
4826         unsigned long flags;
4827
4828         if (adapter->hw.media_type != e1000_media_type_copper)
4829                 return -EOPNOTSUPP;
4830
4831         switch (cmd) {
4832         case SIOCGMIIPHY:
4833                 data->phy_id = adapter->hw.phy_addr;
4834                 break;
4835         case SIOCGMIIREG:
4836                 if (!capable(CAP_NET_ADMIN))
4837                         return -EPERM;
4838                 spin_lock_irqsave(&adapter->stats_lock, flags);
4839                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4840                                    &data->val_out)) {
4841                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4842                         return -EIO;
4843                 }
4844                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4845                 break;
4846         case SIOCSMIIREG:
4847                 if (!capable(CAP_NET_ADMIN))
4848                         return -EPERM;
4849                 if (data->reg_num & ~(0x1F))
4850                         return -EFAULT;
4851                 mii_reg = data->val_in;
4852                 spin_lock_irqsave(&adapter->stats_lock, flags);
4853                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4854                                         mii_reg)) {
4855                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4856                         return -EIO;
4857                 }
4858                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4859                 if (adapter->hw.media_type == e1000_media_type_copper) {
4860                         switch (data->reg_num) {
4861                         case PHY_CTRL:
4862                                 if (mii_reg & MII_CR_POWER_DOWN)
4863                                         break;
4864                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4865                                         adapter->hw.autoneg = 1;
4866                                         adapter->hw.autoneg_advertised = 0x2F;
4867                                 } else {
4868                                         if (mii_reg & 0x40)
4869                                                 spddplx = SPEED_1000;
4870                                         else if (mii_reg & 0x2000)
4871                                                 spddplx = SPEED_100;
4872                                         else
4873                                                 spddplx = SPEED_10;
4874                                         spddplx += (mii_reg & 0x100)
4875                                                    ? DUPLEX_FULL :
4876                                                    DUPLEX_HALF;
4877                                         retval = e1000_set_spd_dplx(adapter,
4878                                                                     spddplx);
4879                                         if (retval)
4880                                                 return retval;
4881                                 }
4882                                 if (netif_running(adapter->netdev))
4883                                         e1000_reinit_locked(adapter);
4884                                 else
4885                                         e1000_reset(adapter);
4886                                 break;
4887                         case M88E1000_PHY_SPEC_CTRL:
4888                         case M88E1000_EXT_PHY_SPEC_CTRL:
4889                                 if (e1000_phy_reset(&adapter->hw))
4890                                         return -EIO;
4891                                 break;
4892                         }
4893                 } else {
4894                         switch (data->reg_num) {
4895                         case PHY_CTRL:
4896                                 if (mii_reg & MII_CR_POWER_DOWN)
4897                                         break;
4898                                 if (netif_running(adapter->netdev))
4899                                         e1000_reinit_locked(adapter);
4900                                 else
4901                                         e1000_reset(adapter);
4902                                 break;
4903                         }
4904                 }
4905                 break;
4906         default:
4907                 return -EOPNOTSUPP;
4908         }
4909         return E1000_SUCCESS;
4910 }
4911
4912 void
4913 e1000_pci_set_mwi(struct e1000_hw *hw)
4914 {
4915         struct e1000_adapter *adapter = hw->back;
4916         int ret_val = pci_set_mwi(adapter->pdev);
4917
4918         if (ret_val)
4919                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4920 }
4921
4922 void
4923 e1000_pci_clear_mwi(struct e1000_hw *hw)
4924 {
4925         struct e1000_adapter *adapter = hw->back;
4926
4927         pci_clear_mwi(adapter->pdev);
4928 }
4929
4930 int
4931 e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4932 {
4933         struct e1000_adapter *adapter = hw->back;
4934         return pcix_get_mmrbc(adapter->pdev);
4935 }
4936
4937 void
4938 e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4939 {
4940         struct e1000_adapter *adapter = hw->back;
4941         pcix_set_mmrbc(adapter->pdev, mmrbc);
4942 }
4943
4944 int32_t
4945 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4946 {
4947     struct e1000_adapter *adapter = hw->back;
4948     uint16_t cap_offset;
4949
4950     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4951     if (!cap_offset)
4952         return -E1000_ERR_CONFIG;
4953
4954     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4955
4956     return E1000_SUCCESS;
4957 }
4958
4959 void
4960 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4961 {
4962         outl(value, port);
4963 }
4964
4965 static void
4966 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4967 {
4968         struct e1000_adapter *adapter = netdev_priv(netdev);
4969         uint32_t ctrl, rctl;
4970
4971         e1000_irq_disable(adapter);
4972         adapter->vlgrp = grp;
4973
4974         if (grp) {
4975                 /* enable VLAN tag insert/strip */
4976                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4977                 ctrl |= E1000_CTRL_VME;
4978                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4979
4980                 if (adapter->hw.mac_type != e1000_ich8lan) {
4981                         /* enable VLAN receive filtering */
4982                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4983                         rctl |= E1000_RCTL_VFE;
4984                         rctl &= ~E1000_RCTL_CFIEN;
4985                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4986                         e1000_update_mng_vlan(adapter);
4987                 }
4988         } else {
4989                 /* disable VLAN tag insert/strip */
4990                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4991                 ctrl &= ~E1000_CTRL_VME;
4992                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4993
4994                 if (adapter->hw.mac_type != e1000_ich8lan) {
4995                         /* disable VLAN filtering */
4996                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4997                         rctl &= ~E1000_RCTL_VFE;
4998                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4999                         if (adapter->mng_vlan_id !=
5000                             (uint16_t)E1000_MNG_VLAN_NONE) {
5001                                 e1000_vlan_rx_kill_vid(netdev,
5002                                                        adapter->mng_vlan_id);
5003                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
5004                         }
5005                 }
5006         }
5007
5008         e1000_irq_enable(adapter);
5009 }
5010
5011 static void
5012 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
5013 {
5014         struct e1000_adapter *adapter = netdev_priv(netdev);
5015         uint32_t vfta, index;
5016
5017         if ((adapter->hw.mng_cookie.status &
5018              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5019             (vid == adapter->mng_vlan_id))
5020                 return;
5021         /* add VID to filter table */
5022         index = (vid >> 5) & 0x7F;
5023         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5024         vfta |= (1 << (vid & 0x1F));
5025         e1000_write_vfta(&adapter->hw, index, vfta);
5026 }
5027
5028 static void
5029 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
5030 {
5031         struct e1000_adapter *adapter = netdev_priv(netdev);
5032         uint32_t vfta, index;
5033
5034         e1000_irq_disable(adapter);
5035         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5036         e1000_irq_enable(adapter);
5037
5038         if ((adapter->hw.mng_cookie.status &
5039              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5040             (vid == adapter->mng_vlan_id)) {
5041                 /* release control to f/w */
5042                 e1000_release_hw_control(adapter);
5043                 return;
5044         }
5045
5046         /* remove VID from 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_restore_vlan(struct e1000_adapter *adapter)
5055 {
5056         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5057
5058         if (adapter->vlgrp) {
5059                 uint16_t vid;
5060                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5061                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5062                                 continue;
5063                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5064                 }
5065         }
5066 }
5067
5068 int
5069 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5070 {
5071         adapter->hw.autoneg = 0;
5072
5073         /* Fiber NICs only allow 1000 gbps Full duplex */
5074         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5075                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5076                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5077                 return -EINVAL;
5078         }
5079
5080         switch (spddplx) {
5081         case SPEED_10 + DUPLEX_HALF:
5082                 adapter->hw.forced_speed_duplex = e1000_10_half;
5083                 break;
5084         case SPEED_10 + DUPLEX_FULL:
5085                 adapter->hw.forced_speed_duplex = e1000_10_full;
5086                 break;
5087         case SPEED_100 + DUPLEX_HALF:
5088                 adapter->hw.forced_speed_duplex = e1000_100_half;
5089                 break;
5090         case SPEED_100 + DUPLEX_FULL:
5091                 adapter->hw.forced_speed_duplex = e1000_100_full;
5092                 break;
5093         case SPEED_1000 + DUPLEX_FULL:
5094                 adapter->hw.autoneg = 1;
5095                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5096                 break;
5097         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5098         default:
5099                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5100                 return -EINVAL;
5101         }
5102         return 0;
5103 }
5104
5105 static int
5106 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5107 {
5108         struct net_device *netdev = pci_get_drvdata(pdev);
5109         struct e1000_adapter *adapter = netdev_priv(netdev);
5110         uint32_t ctrl, ctrl_ext, rctl, status;
5111         uint32_t wufc = adapter->wol;
5112 #ifdef CONFIG_PM
5113         int retval = 0;
5114 #endif
5115
5116         netif_device_detach(netdev);
5117
5118         if (netif_running(netdev)) {
5119                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5120                 e1000_down(adapter);
5121         }
5122
5123 #ifdef CONFIG_PM
5124         retval = pci_save_state(pdev);
5125         if (retval)
5126                 return retval;
5127 #endif
5128
5129         status = E1000_READ_REG(&adapter->hw, STATUS);
5130         if (status & E1000_STATUS_LU)
5131                 wufc &= ~E1000_WUFC_LNKC;
5132
5133         if (wufc) {
5134                 e1000_setup_rctl(adapter);
5135                 e1000_set_rx_mode(netdev);
5136
5137                 /* turn on all-multi mode if wake on multicast is enabled */
5138                 if (wufc & E1000_WUFC_MC) {
5139                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5140                         rctl |= E1000_RCTL_MPE;
5141                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5142                 }
5143
5144                 if (adapter->hw.mac_type >= e1000_82540) {
5145                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5146                         /* advertise wake from D3Cold */
5147                         #define E1000_CTRL_ADVD3WUC 0x00100000
5148                         /* phy power management enable */
5149                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5150                         ctrl |= E1000_CTRL_ADVD3WUC |
5151                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5152                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5153                 }
5154
5155                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5156                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5157                         /* keep the laser running in D3 */
5158                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5159                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5160                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5161                 }
5162
5163                 /* Allow time for pending master requests to run */
5164                 e1000_disable_pciex_master(&adapter->hw);
5165
5166                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5167                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5168                 pci_enable_wake(pdev, PCI_D3hot, 1);
5169                 pci_enable_wake(pdev, PCI_D3cold, 1);
5170         } else {
5171                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5172                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5173                 pci_enable_wake(pdev, PCI_D3hot, 0);
5174                 pci_enable_wake(pdev, PCI_D3cold, 0);
5175         }
5176
5177         e1000_release_manageability(adapter);
5178
5179         /* make sure adapter isn't asleep if manageability is enabled */
5180         if (adapter->en_mng_pt) {
5181                 pci_enable_wake(pdev, PCI_D3hot, 1);
5182                 pci_enable_wake(pdev, PCI_D3cold, 1);
5183         }
5184
5185         if (adapter->hw.phy_type == e1000_phy_igp_3)
5186                 e1000_phy_powerdown_workaround(&adapter->hw);
5187
5188         if (netif_running(netdev))
5189                 e1000_free_irq(adapter);
5190
5191         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5192          * would have already happened in close and is redundant. */
5193         e1000_release_hw_control(adapter);
5194
5195         pci_disable_device(pdev);
5196
5197         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5198
5199         return 0;
5200 }
5201
5202 #ifdef CONFIG_PM
5203 static int
5204 e1000_resume(struct pci_dev *pdev)
5205 {
5206         struct net_device *netdev = pci_get_drvdata(pdev);
5207         struct e1000_adapter *adapter = netdev_priv(netdev);
5208         uint32_t err;
5209
5210         pci_set_power_state(pdev, PCI_D0);
5211         pci_restore_state(pdev);
5212         if ((err = pci_enable_device(pdev))) {
5213                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5214                 return err;
5215         }
5216         pci_set_master(pdev);
5217
5218         pci_enable_wake(pdev, PCI_D3hot, 0);
5219         pci_enable_wake(pdev, PCI_D3cold, 0);
5220
5221         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5222                 return err;
5223
5224         e1000_power_up_phy(adapter);
5225         e1000_reset(adapter);
5226         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5227
5228         e1000_init_manageability(adapter);
5229
5230         if (netif_running(netdev))
5231                 e1000_up(adapter);
5232
5233         netif_device_attach(netdev);
5234
5235         /* If the controller is 82573 and f/w is AMT, do not set
5236          * DRV_LOAD until the interface is up.  For all other cases,
5237          * let the f/w know that the h/w is now under the control
5238          * of the driver. */
5239         if (adapter->hw.mac_type != e1000_82573 ||
5240             !e1000_check_mng_mode(&adapter->hw))
5241                 e1000_get_hw_control(adapter);
5242
5243         return 0;
5244 }
5245 #endif
5246
5247 static void e1000_shutdown(struct pci_dev *pdev)
5248 {
5249         e1000_suspend(pdev, PMSG_SUSPEND);
5250 }
5251
5252 #ifdef CONFIG_NET_POLL_CONTROLLER
5253 /*
5254  * Polling 'interrupt' - used by things like netconsole to send skbs
5255  * without having to re-enable interrupts. It's not called while
5256  * the interrupt routine is executing.
5257  */
5258 static void
5259 e1000_netpoll(struct net_device *netdev)
5260 {
5261         struct e1000_adapter *adapter = netdev_priv(netdev);
5262
5263         disable_irq(adapter->pdev->irq);
5264         e1000_intr(adapter->pdev->irq, netdev);
5265         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5266 #ifndef CONFIG_E1000_NAPI
5267         adapter->clean_rx(adapter, adapter->rx_ring);
5268 #endif
5269         enable_irq(adapter->pdev->irq);
5270 }
5271 #endif
5272
5273 /**
5274  * e1000_io_error_detected - called when PCI error is detected
5275  * @pdev: Pointer to PCI device
5276  * @state: The current pci conneection state
5277  *
5278  * This function is called after a PCI bus error affecting
5279  * this device has been detected.
5280  */
5281 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5282 {
5283         struct net_device *netdev = pci_get_drvdata(pdev);
5284         struct e1000_adapter *adapter = netdev->priv;
5285
5286         netif_device_detach(netdev);
5287
5288         if (netif_running(netdev))
5289                 e1000_down(adapter);
5290         pci_disable_device(pdev);
5291
5292         /* Request a slot slot reset. */
5293         return PCI_ERS_RESULT_NEED_RESET;
5294 }
5295
5296 /**
5297  * e1000_io_slot_reset - called after the pci bus has been reset.
5298  * @pdev: Pointer to PCI device
5299  *
5300  * Restart the card from scratch, as if from a cold-boot. Implementation
5301  * resembles the first-half of the e1000_resume routine.
5302  */
5303 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5304 {
5305         struct net_device *netdev = pci_get_drvdata(pdev);
5306         struct e1000_adapter *adapter = netdev->priv;
5307
5308         if (pci_enable_device(pdev)) {
5309                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5310                 return PCI_ERS_RESULT_DISCONNECT;
5311         }
5312         pci_set_master(pdev);
5313
5314         pci_enable_wake(pdev, PCI_D3hot, 0);
5315         pci_enable_wake(pdev, PCI_D3cold, 0);
5316
5317         e1000_reset(adapter);
5318         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5319
5320         return PCI_ERS_RESULT_RECOVERED;
5321 }
5322
5323 /**
5324  * e1000_io_resume - called when traffic can start flowing again.
5325  * @pdev: Pointer to PCI device
5326  *
5327  * This callback is called when the error recovery driver tells us that
5328  * its OK to resume normal operation. Implementation resembles the
5329  * second-half of the e1000_resume routine.
5330  */
5331 static void e1000_io_resume(struct pci_dev *pdev)
5332 {
5333         struct net_device *netdev = pci_get_drvdata(pdev);
5334         struct e1000_adapter *adapter = netdev->priv;
5335
5336         e1000_init_manageability(adapter);
5337
5338         if (netif_running(netdev)) {
5339                 if (e1000_up(adapter)) {
5340                         printk("e1000: can't bring device back up after reset\n");
5341                         return;
5342                 }
5343         }
5344
5345         netif_device_attach(netdev);
5346
5347         /* If the controller is 82573 and f/w is AMT, do not set
5348          * DRV_LOAD until the interface is up.  For all other cases,
5349          * let the f/w know that the h/w is now under the control
5350          * of the driver. */
5351         if (adapter->hw.mac_type != e1000_82573 ||
5352             !e1000_check_mng_mode(&adapter->hw))
5353                 e1000_get_hw_control(adapter);
5354
5355 }
5356
5357 /* e1000_main.c */