drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  * 6.0.58       4/20/05
  33  *   o Accepted ethtool cleanup patch from Stephen Hemminger
  34  * 6.0.44+      2/15/05
  35  *   o applied Anton's patch to resolve tx hang in hardware
  36  *   o Applied Andrew Mortons patch - e1000 stops working after resume
  37  */
  38
  39 char e1000_driver_name[] = "e1000";
  40 char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  41 #ifndef CONFIG_E1000_NAPI
  42 #define DRIVERNAPI
  43 #else
  44 #define DRIVERNAPI "-NAPI"
  45 #endif
  46 #define DRV_VERSION             "6.0.60-k2"DRIVERNAPI
  47 char e1000_driver_version[] = DRV_VERSION;
  48 char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
  49
  50 /* e1000_pci_tbl - PCI Device ID Table
  51  *
  52  * Last entry must be all 0s
  53  *
  54  * Macro expands to...
  55  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  56  */
  57 static struct pci_device_id e1000_pci_tbl[] = {
  58         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  65         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  66         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  78         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  79         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  83         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  84         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  88         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  89         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  90         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  91         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  92         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  93         INTEL_E1000_ETHERNET_DEVICE(0x108C),
  94         INTEL_E1000_ETHERNET_DEVICE(0x1099),
  95         /* required last entry */
  96         {0,}
  97 };
  98
  99 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 100
 101 int e1000_up(struct e1000_adapter *adapter);
 102 void e1000_down(struct e1000_adapter *adapter);
 103 void e1000_reset(struct e1000_adapter *adapter);
 104 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 105 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 106 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 107 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 108 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 109 int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 110                              struct e1000_tx_ring *txdr);
 111 int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 112                              struct e1000_rx_ring *rxdr);
 113 void e1000_free_tx_resources(struct e1000_adapter *adapter,
 114                              struct e1000_tx_ring *tx_ring);
 115 void e1000_free_rx_resources(struct e1000_adapter *adapter,
 116                              struct e1000_rx_ring *rx_ring);
 117 void e1000_update_stats(struct e1000_adapter *adapter);
 118
 119 /* Local Function Prototypes */
 120
 121 static int e1000_init_module(void);
 122 static void e1000_exit_module(void);
 123 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 124 static void __devexit e1000_remove(struct pci_dev *pdev);
 125 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 126 #ifdef CONFIG_E1000_MQ
 127 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
 128 #endif
 129 static int e1000_sw_init(struct e1000_adapter *adapter);
 130 static int e1000_open(struct net_device *netdev);
 131 static int e1000_close(struct net_device *netdev);
 132 static void e1000_configure_tx(struct e1000_adapter *adapter);
 133 static void e1000_configure_rx(struct e1000_adapter *adapter);
 134 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 135 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 136 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 137 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 138                                 struct e1000_tx_ring *tx_ring);
 139 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 140                                 struct e1000_rx_ring *rx_ring);
 141 static void e1000_set_multi(struct net_device *netdev);
 142 static void e1000_update_phy_info(unsigned long data);
 143 static void e1000_watchdog(unsigned long data);
 144 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 145 static void e1000_82547_tx_fifo_stall(unsigned long data);
 146 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 147 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 148 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 149 static int e1000_set_mac(struct net_device *netdev, void *p);
 150 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 151 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 152                                     struct e1000_tx_ring *tx_ring);
 153 #ifdef CONFIG_E1000_NAPI
 154 static int e1000_clean(struct net_device *poll_dev, int *budget);
 155 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 156                                     struct e1000_rx_ring *rx_ring,
 157                                     int *work_done, int work_to_do);
 158 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 159                                        struct e1000_rx_ring *rx_ring,
 160                                        int *work_done, int work_to_do);
 161 #else
 162 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 163                                     struct e1000_rx_ring *rx_ring);
 164 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 165                                        struct e1000_rx_ring *rx_ring);
 166 #endif
 167 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 168                                    struct e1000_rx_ring *rx_ring);
 169 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 170                                       struct e1000_rx_ring *rx_ring);
 171 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 172 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 173                            int cmd);
 174 void e1000_set_ethtool_ops(struct net_device *netdev);
 175 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 176 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 177 static void e1000_tx_timeout(struct net_device *dev);
 178 static void e1000_tx_timeout_task(struct net_device *dev);
 179 static void e1000_smartspeed(struct e1000_adapter *adapter);
 180 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 181                                               struct sk_buff *skb);
 182
 183 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 184 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 185 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 186 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 187
 188 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 189 #ifdef CONFIG_PM
 190 static int e1000_resume(struct pci_dev *pdev);
 191 #endif
 192
 193 #ifdef CONFIG_NET_POLL_CONTROLLER
 194 /* for netdump / net console */
 195 static void e1000_netpoll (struct net_device *netdev);
 196 #endif
 197
 198 #ifdef CONFIG_E1000_MQ
 199 /* for multiple Rx queues */
 200 void e1000_rx_schedule(void *data);
 201 #endif
 202
 203 /* Exported from other modules */
 204
 205 extern void e1000_check_options(struct e1000_adapter *adapter);
 206
 207 static struct pci_driver e1000_driver = {
 208         .name     = e1000_driver_name,
 209         .id_table = e1000_pci_tbl,
 210         .probe    = e1000_probe,
 211         .remove   = __devexit_p(e1000_remove),
 212         /* Power Managment Hooks */
 213 #ifdef CONFIG_PM
 214         .suspend  = e1000_suspend,
 215         .resume   = e1000_resume
 216 #endif
 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_module_init(&e1000_driver);
 245
 246         return ret;
 247 }
 248
 249 module_init(e1000_init_module);
 250
 251 /**
 252  * e1000_exit_module - Driver Exit Cleanup Routine
 253  *
 254  * e1000_exit_module is called just before the driver is removed
 255  * from memory.
 256  **/
 257
 258 static void __exit
 259 e1000_exit_module(void)
 260 {
 261         pci_unregister_driver(&e1000_driver);
 262 }
 263
 264 module_exit(e1000_exit_module);
 265
 266 /**
 267  * e1000_irq_disable - Mask off interrupt generation on the NIC
 268  * @adapter: board private structure
 269  **/
 270
 271 static inline void
 272 e1000_irq_disable(struct e1000_adapter *adapter)
 273 {
 274         atomic_inc(&adapter->irq_sem);
 275         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 276         E1000_WRITE_FLUSH(&adapter->hw);
 277         synchronize_irq(adapter->pdev->irq);
 278 }
 279
 280 /**
 281  * e1000_irq_enable - Enable default interrupt generation settings
 282  * @adapter: board private structure
 283  **/
 284
 285 static inline void
 286 e1000_irq_enable(struct e1000_adapter *adapter)
 287 {
 288         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 289                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 290                 E1000_WRITE_FLUSH(&adapter->hw);
 291         }
 292 }
 293 void
 294 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 295 {
 296         struct net_device *netdev = adapter->netdev;
 297         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 298         uint16_t old_vid = adapter->mng_vlan_id;
 299         if(adapter->vlgrp) {
 300                 if(!adapter->vlgrp->vlan_devices[vid]) {
 301                         if(adapter->hw.mng_cookie.status &
 302                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 303                                 e1000_vlan_rx_add_vid(netdev, vid);
 304                                 adapter->mng_vlan_id = vid;
 305                         } else
 306                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 307
 308                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 309                                         (vid != old_vid) &&
 310                                         !adapter->vlgrp->vlan_devices[old_vid])
 311                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 312                 }
 313         }
 314 }
 315
 316 int
 317 e1000_up(struct e1000_adapter *adapter)
 318 {
 319         struct net_device *netdev = adapter->netdev;
 320         int i, err;
 321
 322         /* hardware has been reset, we need to reload some things */
 323
 324         /* Reset the PHY if it was previously powered down */
 325         if(adapter->hw.media_type == e1000_media_type_copper) {
 326                 uint16_t mii_reg;
 327                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 328                 if(mii_reg & MII_CR_POWER_DOWN)
 329                         e1000_phy_reset(&adapter->hw);
 330         }
 331
 332         e1000_set_multi(netdev);
 333
 334         e1000_restore_vlan(adapter);
 335
 336         e1000_configure_tx(adapter);
 337         e1000_setup_rctl(adapter);
 338         e1000_configure_rx(adapter);
 339         for (i = 0; i < adapter->num_queues; i++)
 340                 adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]);
 341
 342 #ifdef CONFIG_PCI_MSI
 343         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 344                 adapter->have_msi = TRUE;
 345                 if((err = pci_enable_msi(adapter->pdev))) {
 346                         DPRINTK(PROBE, ERR,
 347                          "Unable to allocate MSI interrupt Error: %d\n", err);
 348                         adapter->have_msi = FALSE;
 349                 }
 350         }
 351 #endif
 352         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 353                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 354                               netdev->name, netdev))) {
 355                 DPRINTK(PROBE, ERR,
 356                     "Unable to allocate interrupt Error: %d\n", err);
 357                 return err;
 358         }
 359
 360         mod_timer(&adapter->watchdog_timer, jiffies);
 361
 362 #ifdef CONFIG_E1000_NAPI
 363         netif_poll_enable(netdev);
 364 #endif
 365         e1000_irq_enable(adapter);
 366
 367         return 0;
 368 }
 369
 370 void
 371 e1000_down(struct e1000_adapter *adapter)
 372 {
 373         struct net_device *netdev = adapter->netdev;
 374
 375         e1000_irq_disable(adapter);
 376 #ifdef CONFIG_E1000_MQ
 377         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 378 #endif
 379         free_irq(adapter->pdev->irq, netdev);
 380 #ifdef CONFIG_PCI_MSI
 381         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 382            adapter->have_msi == TRUE)
 383                 pci_disable_msi(adapter->pdev);
 384 #endif
 385         del_timer_sync(&adapter->tx_fifo_stall_timer);
 386         del_timer_sync(&adapter->watchdog_timer);
 387         del_timer_sync(&adapter->phy_info_timer);
 388
 389 #ifdef CONFIG_E1000_NAPI
 390         netif_poll_disable(netdev);
 391 #endif
 392         adapter->link_speed = 0;
 393         adapter->link_duplex = 0;
 394         netif_carrier_off(netdev);
 395         netif_stop_queue(netdev);
 396
 397         e1000_reset(adapter);
 398         e1000_clean_all_tx_rings(adapter);
 399         e1000_clean_all_rx_rings(adapter);
 400
 401         /* If WoL is not enabled
 402          * and management mode is not IAMT
 403          * Power down the PHY so no link is implied when interface is down */
 404         if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 405            adapter->hw.media_type == e1000_media_type_copper &&
 406            !e1000_check_mng_mode(&adapter->hw) &&
 407            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
 408                 uint16_t mii_reg;
 409                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 410                 mii_reg |= MII_CR_POWER_DOWN;
 411                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 412                 mdelay(1);
 413         }
 414 }
 415
 416 void
 417 e1000_reset(struct e1000_adapter *adapter)
 418 {
 419         struct net_device *netdev = adapter->netdev;
 420         uint32_t pba, manc;
 421         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 422         uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
 423
 424         /* Repartition Pba for greater than 9k mtu
 425          * To take effect CTRL.RST is required.
 426          */
 427
 428         switch (adapter->hw.mac_type) {
 429         case e1000_82547:
 430         case e1000_82547_rev_2:
 431                 pba = E1000_PBA_30K;
 432                 break;
 433         case e1000_82571:
 434         case e1000_82572:
 435                 pba = E1000_PBA_38K;
 436                 break;
 437         case e1000_82573:
 438                 pba = E1000_PBA_12K;
 439                 break;
 440         default:
 441                 pba = E1000_PBA_48K;
 442                 break;
 443         }
 444
 445         if((adapter->hw.mac_type != e1000_82573) &&
 446            (adapter->rx_buffer_len > E1000_RXBUFFER_8192)) {
 447                 pba -= 8; /* allocate more FIFO for Tx */
 448                 /* send an XOFF when there is enough space in the
 449                  * Rx FIFO to hold one extra full size Rx packet
 450                 */
 451                 fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
 452                                         ETHERNET_FCS_SIZE + 1;
 453                 fc_low_water_mark = fc_high_water_mark + 8;
 454         }
 455
 456
 457         if(adapter->hw.mac_type == e1000_82547) {
 458                 adapter->tx_fifo_head = 0;
 459                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 460                 adapter->tx_fifo_size =
 461                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 462                 atomic_set(&adapter->tx_fifo_stall, 0);
 463         }
 464
 465         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 466
 467         /* flow control settings */
 468         adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
 469                                     fc_high_water_mark;
 470         adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
 471                                    fc_low_water_mark;
 472         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 473         adapter->hw.fc_send_xon = 1;
 474         adapter->hw.fc = adapter->hw.original_fc;
 475
 476         /* Allow time for pending master requests to run */
 477         e1000_reset_hw(&adapter->hw);
 478         if(adapter->hw.mac_type >= e1000_82544)
 479                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 480         if(e1000_init_hw(&adapter->hw))
 481                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 482         e1000_update_mng_vlan(adapter);
 483         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 484         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 485
 486         e1000_reset_adaptive(&adapter->hw);
 487         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 488         if (adapter->en_mng_pt) {
 489                 manc = E1000_READ_REG(&adapter->hw, MANC);
 490                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 491                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 492         }
 493 }
 494
 495 /**
 496  * e1000_probe - Device Initialization Routine
 497  * @pdev: PCI device information struct
 498  * @ent: entry in e1000_pci_tbl
 499  *
 500  * Returns 0 on success, negative on failure
 501  *
 502  * e1000_probe initializes an adapter identified by a pci_dev structure.
 503  * The OS initialization, configuring of the adapter private structure,
 504  * and a hardware reset occur.
 505  **/
 506
 507 static int __devinit
 508 e1000_probe(struct pci_dev *pdev,
 509             const struct pci_device_id *ent)
 510 {
 511         struct net_device *netdev;
 512         struct e1000_adapter *adapter;
 513         unsigned long mmio_start, mmio_len;
 514         uint32_t ctrl_ext;
 515         uint32_t swsm;
 516
 517         static int cards_found = 0;
 518         int i, err, pci_using_dac;
 519         uint16_t eeprom_data;
 520         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 521         if((err = pci_enable_device(pdev)))
 522                 return err;
 523
 524         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 525                 pci_using_dac = 1;
 526         } else {
 527                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 528                         E1000_ERR("No usable DMA configuration, aborting\n");
 529                         return err;
 530                 }
 531                 pci_using_dac = 0;
 532         }
 533
 534         if((err = pci_request_regions(pdev, e1000_driver_name)))
 535                 return err;
 536
 537         pci_set_master(pdev);
 538
 539         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 540         if(!netdev) {
 541                 err = -ENOMEM;
 542                 goto err_alloc_etherdev;
 543         }
 544
 545         SET_MODULE_OWNER(netdev);
 546         SET_NETDEV_DEV(netdev, &pdev->dev);
 547
 548         pci_set_drvdata(pdev, netdev);
 549         adapter = netdev_priv(netdev);
 550         adapter->netdev = netdev;
 551         adapter->pdev = pdev;
 552         adapter->hw.back = adapter;
 553         adapter->msg_enable = (1 << debug) - 1;
 554
 555         mmio_start = pci_resource_start(pdev, BAR_0);
 556         mmio_len = pci_resource_len(pdev, BAR_0);
 557
 558         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 559         if(!adapter->hw.hw_addr) {
 560                 err = -EIO;
 561                 goto err_ioremap;
 562         }
 563
 564         for(i = BAR_1; i <= BAR_5; i++) {
 565                 if(pci_resource_len(pdev, i) == 0)
 566                         continue;
 567                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 568                         adapter->hw.io_base = pci_resource_start(pdev, i);
 569                         break;
 570                 }
 571         }
 572
 573         netdev->open = &e1000_open;
 574         netdev->stop = &e1000_close;
 575         netdev->hard_start_xmit = &e1000_xmit_frame;
 576         netdev->get_stats = &e1000_get_stats;
 577         netdev->set_multicast_list = &e1000_set_multi;
 578         netdev->set_mac_address = &e1000_set_mac;
 579         netdev->change_mtu = &e1000_change_mtu;
 580         netdev->do_ioctl = &e1000_ioctl;
 581         e1000_set_ethtool_ops(netdev);
 582         netdev->tx_timeout = &e1000_tx_timeout;
 583         netdev->watchdog_timeo = 5 * HZ;
 584 #ifdef CONFIG_E1000_NAPI
 585         netdev->poll = &e1000_clean;
 586         netdev->weight = 64;
 587 #endif
 588         netdev->vlan_rx_register = e1000_vlan_rx_register;
 589         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 590         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 591 #ifdef CONFIG_NET_POLL_CONTROLLER
 592         netdev->poll_controller = e1000_netpoll;
 593 #endif
 594         strcpy(netdev->name, pci_name(pdev));
 595
 596         netdev->mem_start = mmio_start;
 597         netdev->mem_end = mmio_start + mmio_len;
 598         netdev->base_addr = adapter->hw.io_base;
 599
 600         adapter->bd_number = cards_found;
 601
 602         /* setup the private structure */
 603
 604         if((err = e1000_sw_init(adapter)))
 605                 goto err_sw_init;
 606
 607         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 608                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 609
 610         if(adapter->hw.mac_type >= e1000_82543) {
 611                 netdev->features = NETIF_F_SG |
 612                                    NETIF_F_HW_CSUM |
 613                                    NETIF_F_HW_VLAN_TX |
 614                                    NETIF_F_HW_VLAN_RX |
 615                                    NETIF_F_HW_VLAN_FILTER;
 616         }
 617
 618 #ifdef NETIF_F_TSO
 619         if((adapter->hw.mac_type >= e1000_82544) &&
 620            (adapter->hw.mac_type != e1000_82547))
 621                 netdev->features |= NETIF_F_TSO;
 622
 623 #ifdef NETIF_F_TSO_IPV6
 624         if(adapter->hw.mac_type > e1000_82547_rev_2)
 625                 netdev->features |= NETIF_F_TSO_IPV6;
 626 #endif
 627 #endif
 628         if(pci_using_dac)
 629                 netdev->features |= NETIF_F_HIGHDMA;
 630
 631         /* hard_start_xmit is safe against parallel locking */
 632         netdev->features |= NETIF_F_LLTX;
 633
 634         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 635
 636         /* before reading the EEPROM, reset the controller to
 637          * put the device in a known good starting state */
 638
 639         e1000_reset_hw(&adapter->hw);
 640
 641         /* make sure the EEPROM is good */
 642
 643         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 644                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 645                 err = -EIO;
 646                 goto err_eeprom;
 647         }
 648
 649         /* copy the MAC address out of the EEPROM */
 650
 651         if(e1000_read_mac_addr(&adapter->hw))
 652                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 653         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 654         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 655
 656         if(!is_valid_ether_addr(netdev->perm_addr)) {
 657                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 658                 err = -EIO;
 659                 goto err_eeprom;
 660         }
 661
 662         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 663
 664         e1000_get_bus_info(&adapter->hw);
 665
 666         init_timer(&adapter->tx_fifo_stall_timer);
 667         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 668         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 669
 670         init_timer(&adapter->watchdog_timer);
 671         adapter->watchdog_timer.function = &e1000_watchdog;
 672         adapter->watchdog_timer.data = (unsigned long) adapter;
 673
 674         INIT_WORK(&adapter->watchdog_task,
 675                 (void (*)(void *))e1000_watchdog_task, adapter);
 676
 677         init_timer(&adapter->phy_info_timer);
 678         adapter->phy_info_timer.function = &e1000_update_phy_info;
 679         adapter->phy_info_timer.data = (unsigned long) adapter;
 680
 681         INIT_WORK(&adapter->tx_timeout_task,
 682                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 683
 684         /* we're going to reset, so assume we have no link for now */
 685
 686         netif_carrier_off(netdev);
 687         netif_stop_queue(netdev);
 688
 689         e1000_check_options(adapter);
 690
 691         /* Initial Wake on LAN setting
 692          * If APM wake is enabled in the EEPROM,
 693          * enable the ACPI Magic Packet filter
 694          */
 695
 696         switch(adapter->hw.mac_type) {
 697         case e1000_82542_rev2_0:
 698         case e1000_82542_rev2_1:
 699         case e1000_82543:
 700                 break;
 701         case e1000_82544:
 702                 e1000_read_eeprom(&adapter->hw,
 703                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 704                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 705                 break;
 706         case e1000_82546:
 707         case e1000_82546_rev_3:
 708                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 709                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 710                         e1000_read_eeprom(&adapter->hw,
 711                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 712                         break;
 713                 }
 714                 /* Fall Through */
 715         default:
 716                 e1000_read_eeprom(&adapter->hw,
 717                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 718                 break;
 719         }
 720         if(eeprom_data & eeprom_apme_mask)
 721                 adapter->wol |= E1000_WUFC_MAG;
 722
 723         /* reset the hardware with the new settings */
 724         e1000_reset(adapter);
 725
 726         /* Let firmware know the driver has taken over */
 727         switch(adapter->hw.mac_type) {
 728         case e1000_82571:
 729         case e1000_82572:
 730                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 731                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 732                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 733                 break;
 734         case e1000_82573:
 735                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 736                 E1000_WRITE_REG(&adapter->hw, SWSM,
 737                                 swsm | E1000_SWSM_DRV_LOAD);
 738                 break;
 739         default:
 740                 break;
 741         }
 742
 743         strcpy(netdev->name, "eth%d");
 744         if((err = register_netdev(netdev)))
 745                 goto err_register;
 746
 747         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 748
 749         cards_found++;
 750         return 0;
 751
 752 err_register:
 753 err_sw_init:
 754 err_eeprom:
 755         iounmap(adapter->hw.hw_addr);
 756 err_ioremap:
 757         free_netdev(netdev);
 758 err_alloc_etherdev:
 759         pci_release_regions(pdev);
 760         return err;
 761 }
 762
 763 /**
 764  * e1000_remove - Device Removal Routine
 765  * @pdev: PCI device information struct
 766  *
 767  * e1000_remove is called by the PCI subsystem to alert the driver
 768  * that it should release a PCI device.  The could be caused by a
 769  * Hot-Plug event, or because the driver is going to be removed from
 770  * memory.
 771  **/
 772
 773 static void __devexit
 774 e1000_remove(struct pci_dev *pdev)
 775 {
 776         struct net_device *netdev = pci_get_drvdata(pdev);
 777         struct e1000_adapter *adapter = netdev_priv(netdev);
 778         uint32_t ctrl_ext;
 779         uint32_t manc, swsm;
 780 #ifdef CONFIG_E1000_NAPI
 781         int i;
 782 #endif
 783
 784         flush_scheduled_work();
 785
 786         if(adapter->hw.mac_type >= e1000_82540 &&
 787            adapter->hw.media_type == e1000_media_type_copper) {
 788                 manc = E1000_READ_REG(&adapter->hw, MANC);
 789                 if(manc & E1000_MANC_SMBUS_EN) {
 790                         manc |= E1000_MANC_ARP_EN;
 791                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 792                 }
 793         }
 794
 795         switch(adapter->hw.mac_type) {
 796         case e1000_82571:
 797         case e1000_82572:
 798                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 799                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 800                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 801                 break;
 802         case e1000_82573:
 803                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 804                 E1000_WRITE_REG(&adapter->hw, SWSM,
 805                                 swsm & ~E1000_SWSM_DRV_LOAD);
 806                 break;
 807
 808         default:
 809                 break;
 810         }
 811
 812         unregister_netdev(netdev);
 813 #ifdef CONFIG_E1000_NAPI
 814         for (i = 0; i < adapter->num_queues; i++)
 815                 __dev_put(&adapter->polling_netdev[i]);
 816 #endif
 817
 818         if(!e1000_check_phy_reset_block(&adapter->hw))
 819                 e1000_phy_hw_reset(&adapter->hw);
 820
 821         kfree(adapter->tx_ring);
 822         kfree(adapter->rx_ring);
 823 #ifdef CONFIG_E1000_NAPI
 824         kfree(adapter->polling_netdev);
 825 #endif
 826
 827         iounmap(adapter->hw.hw_addr);
 828         pci_release_regions(pdev);
 829
 830 #ifdef CONFIG_E1000_MQ
 831         free_percpu(adapter->cpu_netdev);
 832         free_percpu(adapter->cpu_tx_ring);
 833 #endif
 834         free_netdev(netdev);
 835
 836         pci_disable_device(pdev);
 837 }
 838
 839 /**
 840  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 841  * @adapter: board private structure to initialize
 842  *
 843  * e1000_sw_init initializes the Adapter private data structure.
 844  * Fields are initialized based on PCI device information and
 845  * OS network device settings (MTU size).
 846  **/
 847
 848 static int __devinit
 849 e1000_sw_init(struct e1000_adapter *adapter)
 850 {
 851         struct e1000_hw *hw = &adapter->hw;
 852         struct net_device *netdev = adapter->netdev;
 853         struct pci_dev *pdev = adapter->pdev;
 854 #ifdef CONFIG_E1000_NAPI
 855         int i;
 856 #endif
 857
 858         /* PCI config space info */
 859
 860         hw->vendor_id = pdev->vendor;
 861         hw->device_id = pdev->device;
 862         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 863         hw->subsystem_id = pdev->subsystem_device;
 864
 865         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 866
 867         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 868
 869         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 870         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 871         hw->max_frame_size = netdev->mtu +
 872                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 873         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 874
 875         /* identify the MAC */
 876
 877         if(e1000_set_mac_type(hw)) {
 878                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 879                 return -EIO;
 880         }
 881
 882         /* initialize eeprom parameters */
 883
 884         if(e1000_init_eeprom_params(hw)) {
 885                 E1000_ERR("EEPROM initialization failed\n");
 886                 return -EIO;
 887         }
 888
 889         switch(hw->mac_type) {
 890         default:
 891                 break;
 892         case e1000_82541:
 893         case e1000_82547:
 894         case e1000_82541_rev_2:
 895         case e1000_82547_rev_2:
 896                 hw->phy_init_script = 1;
 897                 break;
 898         }
 899
 900         e1000_set_media_type(hw);
 901
 902         hw->wait_autoneg_complete = FALSE;
 903         hw->tbi_compatibility_en = TRUE;
 904         hw->adaptive_ifs = TRUE;
 905
 906         /* Copper options */
 907
 908         if(hw->media_type == e1000_media_type_copper) {
 909                 hw->mdix = AUTO_ALL_MODES;
 910                 hw->disable_polarity_correction = FALSE;
 911                 hw->master_slave = E1000_MASTER_SLAVE;
 912         }
 913
 914 #ifdef CONFIG_E1000_MQ
 915         /* Number of supported queues */
 916         switch (hw->mac_type) {
 917         case e1000_82571:
 918         case e1000_82572:
 919                 adapter->num_queues = 2;
 920                 break;
 921         default:
 922                 adapter->num_queues = 1;
 923                 break;
 924         }
 925         adapter->num_queues = min(adapter->num_queues, num_online_cpus());
 926 #else
 927         adapter->num_queues = 1;
 928 #endif
 929
 930         if (e1000_alloc_queues(adapter)) {
 931                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
 932                 return -ENOMEM;
 933         }
 934
 935 #ifdef CONFIG_E1000_NAPI
 936         for (i = 0; i < adapter->num_queues; i++) {
 937                 adapter->polling_netdev[i].priv = adapter;
 938                 adapter->polling_netdev[i].poll = &e1000_clean;
 939                 adapter->polling_netdev[i].weight = 64;
 940                 dev_hold(&adapter->polling_netdev[i]);
 941                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
 942         }
 943 #endif
 944
 945 #ifdef CONFIG_E1000_MQ
 946         e1000_setup_queue_mapping(adapter);
 947 #endif
 948
 949         atomic_set(&adapter->irq_sem, 1);
 950         spin_lock_init(&adapter->stats_lock);
 951
 952         return 0;
 953 }
 954
 955 /**
 956  * e1000_alloc_queues - Allocate memory for all rings
 957  * @adapter: board private structure to initialize
 958  *
 959  * We allocate one ring per queue at run-time since we don't know the
 960  * number of queues at compile-time.  The polling_netdev array is
 961  * intended for Multiqueue, but should work fine with a single queue.
 962  **/
 963
 964 static int __devinit
 965 e1000_alloc_queues(struct e1000_adapter *adapter)
 966 {
 967         int size;
 968
 969         size = sizeof(struct e1000_tx_ring) * adapter->num_queues;
 970         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
 971         if (!adapter->tx_ring)
 972                 return -ENOMEM;
 973         memset(adapter->tx_ring, 0, size);
 974
 975         size = sizeof(struct e1000_rx_ring) * adapter->num_queues;
 976         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
 977         if (!adapter->rx_ring) {
 978                 kfree(adapter->tx_ring);
 979                 return -ENOMEM;
 980         }
 981         memset(adapter->rx_ring, 0, size);
 982
 983 #ifdef CONFIG_E1000_NAPI
 984         size = sizeof(struct net_device) * adapter->num_queues;
 985         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
 986         if (!adapter->polling_netdev) {
 987                 kfree(adapter->tx_ring);
 988                 kfree(adapter->rx_ring);
 989                 return -ENOMEM;
 990         }
 991         memset(adapter->polling_netdev, 0, size);
 992 #endif
 993
 994         return E1000_SUCCESS;
 995 }
 996
 997 #ifdef CONFIG_E1000_MQ
 998 static void __devinit
 999 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1000 {
1001         int i, cpu;
1002
1003         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1004         adapter->rx_sched_call_data.info = adapter->netdev;
1005         cpus_clear(adapter->rx_sched_call_data.cpumask);
1006
1007         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1008         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1009
1010         lock_cpu_hotplug();
1011         i = 0;
1012         for_each_online_cpu(cpu) {
1013                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_queues];
1014                 /* This is incomplete because we'd like to assign separate
1015                  * physical cpus to these netdev polling structures and
1016                  * avoid saturating a subset of cpus.
1017                  */
1018                 if (i < adapter->num_queues) {
1019                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1020                         adapter->cpu_for_queue[i] = cpu;
1021                 } else
1022                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1023
1024                 i++;
1025         }
1026         unlock_cpu_hotplug();
1027 }
1028 #endif
1029
1030 /**
1031  * e1000_open - Called when a network interface is made active
1032  * @netdev: network interface device structure
1033  *
1034  * Returns 0 on success, negative value on failure
1035  *
1036  * The open entry point is called when a network interface is made
1037  * active by the system (IFF_UP).  At this point all resources needed
1038  * for transmit and receive operations are allocated, the interrupt
1039  * handler is registered with the OS, the watchdog timer is started,
1040  * and the stack is notified that the interface is ready.
1041  **/
1042
1043 static int
1044 e1000_open(struct net_device *netdev)
1045 {
1046         struct e1000_adapter *adapter = netdev_priv(netdev);
1047         int err;
1048
1049         /* allocate transmit descriptors */
1050
1051         if ((err = e1000_setup_all_tx_resources(adapter)))
1052                 goto err_setup_tx;
1053
1054         /* allocate receive descriptors */
1055
1056         if ((err = e1000_setup_all_rx_resources(adapter)))
1057                 goto err_setup_rx;
1058
1059         if((err = e1000_up(adapter)))
1060                 goto err_up;
1061         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1062         if((adapter->hw.mng_cookie.status &
1063                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1064                 e1000_update_mng_vlan(adapter);
1065         }
1066
1067         return E1000_SUCCESS;
1068
1069 err_up:
1070         e1000_free_all_rx_resources(adapter);
1071 err_setup_rx:
1072         e1000_free_all_tx_resources(adapter);
1073 err_setup_tx:
1074         e1000_reset(adapter);
1075
1076         return err;
1077 }
1078
1079 /**
1080  * e1000_close - Disables a network interface
1081  * @netdev: network interface device structure
1082  *
1083  * Returns 0, this is not allowed to fail
1084  *
1085  * The close entry point is called when an interface is de-activated
1086  * by the OS.  The hardware is still under the drivers control, but
1087  * needs to be disabled.  A global MAC reset is issued to stop the
1088  * hardware, and all transmit and receive resources are freed.
1089  **/
1090
1091 static int
1092 e1000_close(struct net_device *netdev)
1093 {
1094         struct e1000_adapter *adapter = netdev_priv(netdev);
1095
1096         e1000_down(adapter);
1097
1098         e1000_free_all_tx_resources(adapter);
1099         e1000_free_all_rx_resources(adapter);
1100
1101         if((adapter->hw.mng_cookie.status &
1102                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1103                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1104         }
1105         return 0;
1106 }
1107
1108 /**
1109  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1110  * @adapter: address of board private structure
1111  * @start: address of beginning of memory
1112  * @len: length of memory
1113  **/
1114 static inline boolean_t
1115 e1000_check_64k_bound(struct e1000_adapter *adapter,
1116                       void *start, unsigned long len)
1117 {
1118         unsigned long begin = (unsigned long) start;
1119         unsigned long end = begin + len;
1120
1121         /* First rev 82545 and 82546 need to not allow any memory
1122          * write location to cross 64k boundary due to errata 23 */
1123         if (adapter->hw.mac_type == e1000_82545 ||
1124             adapter->hw.mac_type == e1000_82546) {
1125                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1126         }
1127
1128         return TRUE;
1129 }
1130
1131 /**
1132  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1133  * @adapter: board private structure
1134  * @txdr:    tx descriptor ring (for a specific queue) to setup
1135  *
1136  * Return 0 on success, negative on failure
1137  **/
1138
1139 int
1140 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1141                          struct e1000_tx_ring *txdr)
1142 {
1143         struct pci_dev *pdev = adapter->pdev;
1144         int size;
1145
1146         size = sizeof(struct e1000_buffer) * txdr->count;
1147         txdr->buffer_info = vmalloc(size);
1148         if(!txdr->buffer_info) {
1149                 DPRINTK(PROBE, ERR,
1150                 "Unable to allocate memory for the transmit descriptor ring\n");
1151                 return -ENOMEM;
1152         }
1153         memset(txdr->buffer_info, 0, size);
1154         memset(&txdr->previous_buffer_info, 0, sizeof(struct e1000_buffer));
1155
1156         /* round up to nearest 4K */
1157
1158         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1159         E1000_ROUNDUP(txdr->size, 4096);
1160
1161         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1162         if(!txdr->desc) {
1163 setup_tx_desc_die:
1164                 vfree(txdr->buffer_info);
1165                 DPRINTK(PROBE, ERR,
1166                 "Unable to allocate memory for the transmit descriptor ring\n");
1167                 return -ENOMEM;
1168         }
1169
1170         /* Fix for errata 23, can't cross 64kB boundary */
1171         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1172                 void *olddesc = txdr->desc;
1173                 dma_addr_t olddma = txdr->dma;
1174                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1175                                      "at %p\n", txdr->size, txdr->desc);
1176                 /* Try again, without freeing the previous */
1177                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1178                 if(!txdr->desc) {
1179                 /* Failed allocation, critical failure */
1180                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1181                         goto setup_tx_desc_die;
1182                 }
1183
1184                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1185                         /* give up */
1186                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1187                                             txdr->dma);
1188                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1189                         DPRINTK(PROBE, ERR,
1190                                 "Unable to allocate aligned memory "
1191                                 "for the transmit descriptor ring\n");
1192                         vfree(txdr->buffer_info);
1193                         return -ENOMEM;
1194                 } else {
1195                         /* Free old allocation, new allocation was successful */
1196                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1197                 }
1198         }
1199         memset(txdr->desc, 0, txdr->size);
1200
1201         txdr->next_to_use = 0;
1202         txdr->next_to_clean = 0;
1203         spin_lock_init(&txdr->tx_lock);
1204
1205         return 0;
1206 }
1207
1208 /**
1209  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1210  *                                (Descriptors) for all queues
1211  * @adapter: board private structure
1212  *
1213  * If this function returns with an error, then it's possible one or
1214  * more of the rings is populated (while the rest are not).  It is the
1215  * callers duty to clean those orphaned rings.
1216  *
1217  * Return 0 on success, negative on failure
1218  **/
1219
1220 int
1221 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1222 {
1223         int i, err = 0;
1224
1225         for (i = 0; i < adapter->num_queues; i++) {
1226                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1227                 if (err) {
1228                         DPRINTK(PROBE, ERR,
1229                                 "Allocation for Tx Queue %u failed\n", i);
1230                         break;
1231                 }
1232         }
1233
1234         return err;
1235 }
1236
1237 /**
1238  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1239  * @adapter: board private structure
1240  *
1241  * Configure the Tx unit of the MAC after a reset.
1242  **/
1243
1244 static void
1245 e1000_configure_tx(struct e1000_adapter *adapter)
1246 {
1247         uint64_t tdba;
1248         struct e1000_hw *hw = &adapter->hw;
1249         uint32_t tdlen, tctl, tipg, tarc;
1250
1251         /* Setup the HW Tx Head and Tail descriptor pointers */
1252
1253         switch (adapter->num_queues) {
1254         case 2:
1255                 tdba = adapter->tx_ring[1].dma;
1256                 tdlen = adapter->tx_ring[1].count *
1257                         sizeof(struct e1000_tx_desc);
1258                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1259                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1260                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1261                 E1000_WRITE_REG(hw, TDH1, 0);
1262                 E1000_WRITE_REG(hw, TDT1, 0);
1263                 adapter->tx_ring[1].tdh = E1000_TDH1;
1264                 adapter->tx_ring[1].tdt = E1000_TDT1;
1265                 /* Fall Through */
1266         case 1:
1267         default:
1268                 tdba = adapter->tx_ring[0].dma;
1269                 tdlen = adapter->tx_ring[0].count *
1270                         sizeof(struct e1000_tx_desc);
1271                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1272                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1273                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1274                 E1000_WRITE_REG(hw, TDH, 0);
1275                 E1000_WRITE_REG(hw, TDT, 0);
1276                 adapter->tx_ring[0].tdh = E1000_TDH;
1277                 adapter->tx_ring[0].tdt = E1000_TDT;
1278                 break;
1279         }
1280
1281         /* Set the default values for the Tx Inter Packet Gap timer */
1282
1283         switch (hw->mac_type) {
1284         case e1000_82542_rev2_0:
1285         case e1000_82542_rev2_1:
1286                 tipg = DEFAULT_82542_TIPG_IPGT;
1287                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1288                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1289                 break;
1290         default:
1291                 if (hw->media_type == e1000_media_type_fiber ||
1292                     hw->media_type == e1000_media_type_internal_serdes)
1293                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1294                 else
1295                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1296                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1297                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1298         }
1299         E1000_WRITE_REG(hw, TIPG, tipg);
1300
1301         /* Set the Tx Interrupt Delay register */
1302
1303         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1304         if (hw->mac_type >= e1000_82540)
1305                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1306
1307         /* Program the Transmit Control Register */
1308
1309         tctl = E1000_READ_REG(hw, TCTL);
1310
1311         tctl &= ~E1000_TCTL_CT;
1312         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1313                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1314
1315         E1000_WRITE_REG(hw, TCTL, tctl);
1316
1317         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1318                 tarc = E1000_READ_REG(hw, TARC0);
1319                 tarc |= ((1 << 25) | (1 << 21));
1320                 E1000_WRITE_REG(hw, TARC0, tarc);
1321                 tarc = E1000_READ_REG(hw, TARC1);
1322                 tarc |= (1 << 25);
1323                 if (tctl & E1000_TCTL_MULR)
1324                         tarc &= ~(1 << 28);
1325                 else
1326                         tarc |= (1 << 28);
1327                 E1000_WRITE_REG(hw, TARC1, tarc);
1328         }
1329
1330         e1000_config_collision_dist(hw);
1331
1332         /* Setup Transmit Descriptor Settings for eop descriptor */
1333         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1334                 E1000_TXD_CMD_IFCS;
1335
1336         if (hw->mac_type < e1000_82543)
1337                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1338         else
1339                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1340
1341         /* Cache if we're 82544 running in PCI-X because we'll
1342          * need this to apply a workaround later in the send path. */
1343         if (hw->mac_type == e1000_82544 &&
1344             hw->bus_type == e1000_bus_type_pcix)
1345                 adapter->pcix_82544 = 1;
1346 }
1347
1348 /**
1349  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1350  * @adapter: board private structure
1351  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1352  *
1353  * Returns 0 on success, negative on failure
1354  **/
1355
1356 int
1357 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1358                          struct e1000_rx_ring *rxdr)
1359 {
1360         struct pci_dev *pdev = adapter->pdev;
1361         int size, desc_len;
1362
1363         size = sizeof(struct e1000_buffer) * rxdr->count;
1364         rxdr->buffer_info = vmalloc(size);
1365         if (!rxdr->buffer_info) {
1366                 DPRINTK(PROBE, ERR,
1367                 "Unable to allocate memory for the receive descriptor ring\n");
1368                 return -ENOMEM;
1369         }
1370         memset(rxdr->buffer_info, 0, size);
1371
1372         size = sizeof(struct e1000_ps_page) * rxdr->count;
1373         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1374         if(!rxdr->ps_page) {
1375                 vfree(rxdr->buffer_info);
1376                 DPRINTK(PROBE, ERR,
1377                 "Unable to allocate memory for the receive descriptor ring\n");
1378                 return -ENOMEM;
1379         }
1380         memset(rxdr->ps_page, 0, size);
1381
1382         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1383         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1384         if(!rxdr->ps_page_dma) {
1385                 vfree(rxdr->buffer_info);
1386                 kfree(rxdr->ps_page);
1387                 DPRINTK(PROBE, ERR,
1388                 "Unable to allocate memory for the receive descriptor ring\n");
1389                 return -ENOMEM;
1390         }
1391         memset(rxdr->ps_page_dma, 0, size);
1392
1393         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1394                 desc_len = sizeof(struct e1000_rx_desc);
1395         else
1396                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1397
1398         /* Round up to nearest 4K */
1399
1400         rxdr->size = rxdr->count * desc_len;
1401         E1000_ROUNDUP(rxdr->size, 4096);
1402
1403         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1404
1405         if (!rxdr->desc) {
1406                 DPRINTK(PROBE, ERR,
1407                 "Unable to allocate memory for the receive descriptor ring\n");
1408 setup_rx_desc_die:
1409                 vfree(rxdr->buffer_info);
1410                 kfree(rxdr->ps_page);
1411                 kfree(rxdr->ps_page_dma);
1412                 return -ENOMEM;
1413         }
1414
1415         /* Fix for errata 23, can't cross 64kB boundary */
1416         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1417                 void *olddesc = rxdr->desc;
1418                 dma_addr_t olddma = rxdr->dma;
1419                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1420                                      "at %p\n", rxdr->size, rxdr->desc);
1421                 /* Try again, without freeing the previous */
1422                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1423                 /* Failed allocation, critical failure */
1424                 if (!rxdr->desc) {
1425                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1426                         DPRINTK(PROBE, ERR,
1427                                 "Unable to allocate memory "
1428                                 "for the receive descriptor ring\n");
1429                         goto setup_rx_desc_die;
1430                 }
1431
1432                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1433                         /* give up */
1434                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1435                                             rxdr->dma);
1436                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1437                         DPRINTK(PROBE, ERR,
1438                                 "Unable to allocate aligned memory "
1439                                 "for the receive descriptor ring\n");
1440                         goto setup_rx_desc_die;
1441                 } else {
1442                         /* Free old allocation, new allocation was successful */
1443                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1444                 }
1445         }
1446         memset(rxdr->desc, 0, rxdr->size);
1447
1448         rxdr->next_to_clean = 0;
1449         rxdr->next_to_use = 0;
1450
1451         return 0;
1452 }
1453
1454 /**
1455  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1456  *                                (Descriptors) for all queues
1457  * @adapter: board private structure
1458  *
1459  * If this function returns with an error, then it's possible one or
1460  * more of the rings is populated (while the rest are not).  It is the
1461  * callers duty to clean those orphaned rings.
1462  *
1463  * Return 0 on success, negative on failure
1464  **/
1465
1466 int
1467 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1468 {
1469         int i, err = 0;
1470
1471         for (i = 0; i < adapter->num_queues; i++) {
1472                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1473                 if (err) {
1474                         DPRINTK(PROBE, ERR,
1475                                 "Allocation for Rx Queue %u failed\n", i);
1476                         break;
1477                 }
1478         }
1479
1480         return err;
1481 }
1482
1483 /**
1484  * e1000_setup_rctl - configure the receive control registers
1485  * @adapter: Board private structure
1486  **/
1487 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1488                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1489 static void
1490 e1000_setup_rctl(struct e1000_adapter *adapter)
1491 {
1492         uint32_t rctl, rfctl;
1493         uint32_t psrctl = 0;
1494 #ifdef CONFIG_E1000_PACKET_SPLIT
1495         uint32_t pages = 0;
1496 #endif
1497
1498         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1499
1500         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1501
1502         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1503                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1504                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1505
1506         if(adapter->hw.tbi_compatibility_on == 1)
1507                 rctl |= E1000_RCTL_SBP;
1508         else
1509                 rctl &= ~E1000_RCTL_SBP;
1510
1511         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1512                 rctl &= ~E1000_RCTL_LPE;
1513         else
1514                 rctl |= E1000_RCTL_LPE;
1515
1516         /* Setup buffer sizes */
1517         if(adapter->hw.mac_type >= e1000_82571) {
1518                 /* We can now specify buffers in 1K increments.
1519                  * BSIZE and BSEX are ignored in this case. */
1520                 rctl |= adapter->rx_buffer_len << 0x11;
1521         } else {
1522                 rctl &= ~E1000_RCTL_SZ_4096;
1523                 rctl |= E1000_RCTL_BSEX;
1524                 switch (adapter->rx_buffer_len) {
1525                 case E1000_RXBUFFER_2048:
1526                 default:
1527                         rctl |= E1000_RCTL_SZ_2048;
1528                         rctl &= ~E1000_RCTL_BSEX;
1529                         break;
1530                 case E1000_RXBUFFER_4096:
1531                         rctl |= E1000_RCTL_SZ_4096;
1532                         break;
1533                 case E1000_RXBUFFER_8192:
1534                         rctl |= E1000_RCTL_SZ_8192;
1535                         break;
1536                 case E1000_RXBUFFER_16384:
1537                         rctl |= E1000_RCTL_SZ_16384;
1538                         break;
1539                 }
1540         }
1541
1542 #ifdef CONFIG_E1000_PACKET_SPLIT
1543         /* 82571 and greater support packet-split where the protocol
1544          * header is placed in skb->data and the packet data is
1545          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1546          * In the case of a non-split, skb->data is linearly filled,
1547          * followed by the page buffers.  Therefore, skb->data is
1548          * sized to hold the largest protocol header.
1549          */
1550         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1551         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1552             PAGE_SIZE <= 16384)
1553                 adapter->rx_ps_pages = pages;
1554         else
1555                 adapter->rx_ps_pages = 0;
1556 #endif
1557         if (adapter->rx_ps_pages) {
1558                 /* Configure extra packet-split registers */
1559                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1560                 rfctl |= E1000_RFCTL_EXTEN;
1561                 /* disable IPv6 packet split support */
1562                 rfctl |= E1000_RFCTL_IPV6_DIS;
1563                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1564
1565                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1566
1567                 psrctl |= adapter->rx_ps_bsize0 >>
1568                         E1000_PSRCTL_BSIZE0_SHIFT;
1569
1570                 switch (adapter->rx_ps_pages) {
1571                 case 3:
1572                         psrctl |= PAGE_SIZE <<
1573                                 E1000_PSRCTL_BSIZE3_SHIFT;
1574                 case 2:
1575                         psrctl |= PAGE_SIZE <<
1576                                 E1000_PSRCTL_BSIZE2_SHIFT;
1577                 case 1:
1578                         psrctl |= PAGE_SIZE >>
1579                                 E1000_PSRCTL_BSIZE1_SHIFT;
1580                         break;
1581                 }
1582
1583                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1584         }
1585
1586         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1587 }
1588
1589 /**
1590  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1591  * @adapter: board private structure
1592  *
1593  * Configure the Rx unit of the MAC after a reset.
1594  **/
1595
1596 static void
1597 e1000_configure_rx(struct e1000_adapter *adapter)
1598 {
1599         uint64_t rdba;
1600         struct e1000_hw *hw = &adapter->hw;
1601         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1602 #ifdef CONFIG_E1000_MQ
1603         uint32_t reta, mrqc;
1604         int i;
1605 #endif
1606
1607         if (adapter->rx_ps_pages) {
1608                 rdlen = adapter->rx_ring[0].count *
1609                         sizeof(union e1000_rx_desc_packet_split);
1610                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1611                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1612         } else {
1613                 rdlen = adapter->rx_ring[0].count *
1614                         sizeof(struct e1000_rx_desc);
1615                 adapter->clean_rx = e1000_clean_rx_irq;
1616                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1617         }
1618
1619         /* disable receives while setting up the descriptors */
1620         rctl = E1000_READ_REG(hw, RCTL);
1621         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1622
1623         /* set the Receive Delay Timer Register */
1624         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1625
1626         if (hw->mac_type >= e1000_82540) {
1627                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1628                 if(adapter->itr > 1)
1629                         E1000_WRITE_REG(hw, ITR,
1630                                 1000000000 / (adapter->itr * 256));
1631         }
1632
1633         if (hw->mac_type >= e1000_82571) {
1634                 /* Reset delay timers after every interrupt */
1635                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1636                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1637                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1638                 E1000_WRITE_FLUSH(hw);
1639         }
1640
1641         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1642          * the Base and Length of the Rx Descriptor Ring */
1643         switch (adapter->num_queues) {
1644 #ifdef CONFIG_E1000_MQ
1645         case 2:
1646                 rdba = adapter->rx_ring[1].dma;
1647                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1648                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1649                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1650                 E1000_WRITE_REG(hw, RDH1, 0);
1651                 E1000_WRITE_REG(hw, RDT1, 0);
1652                 adapter->rx_ring[1].rdh = E1000_RDH1;
1653                 adapter->rx_ring[1].rdt = E1000_RDT1;
1654                 /* Fall Through */
1655 #endif
1656         case 1:
1657         default:
1658                 rdba = adapter->rx_ring[0].dma;
1659                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1660                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1661                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1662                 E1000_WRITE_REG(hw, RDH, 0);
1663                 E1000_WRITE_REG(hw, RDT, 0);
1664                 adapter->rx_ring[0].rdh = E1000_RDH;
1665                 adapter->rx_ring[0].rdt = E1000_RDT;
1666                 break;
1667         }
1668
1669 #ifdef CONFIG_E1000_MQ
1670         if (adapter->num_queues > 1) {
1671                 uint32_t random[10];
1672
1673                 get_random_bytes(&random[0], 40);
1674
1675                 if (hw->mac_type <= e1000_82572) {
1676                         E1000_WRITE_REG(hw, RSSIR, 0);
1677                         E1000_WRITE_REG(hw, RSSIM, 0);
1678                 }
1679
1680                 switch (adapter->num_queues) {
1681                 case 2:
1682                 default:
1683                         reta = 0x00800080;
1684                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1685                         break;
1686                 }
1687
1688                 /* Fill out redirection table */
1689                 for (i = 0; i < 32; i++)
1690                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1691                 /* Fill out hash function seeds */
1692                 for (i = 0; i < 10; i++)
1693                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1694
1695                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1696                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1697                 E1000_WRITE_REG(hw, MRQC, mrqc);
1698         }
1699
1700         /* Multiqueue and packet checksumming are mutually exclusive. */
1701         if (hw->mac_type >= e1000_82571) {
1702                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1703                 rxcsum |= E1000_RXCSUM_PCSD;
1704                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1705         }
1706
1707 #else
1708
1709         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1710         if (hw->mac_type >= e1000_82543) {
1711                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1712                 if(adapter->rx_csum == TRUE) {
1713                         rxcsum |= E1000_RXCSUM_TUOFL;
1714
1715                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1716                          * Must be used in conjunction with packet-split. */
1717                         if ((hw->mac_type >= e1000_82571) &&
1718                            (adapter->rx_ps_pages)) {
1719                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1720                         }
1721                 } else {
1722                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1723                         /* don't need to clear IPPCSE as it defaults to 0 */
1724                 }
1725                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1726         }
1727 #endif /* CONFIG_E1000_MQ */
1728
1729         if (hw->mac_type == e1000_82573)
1730                 E1000_WRITE_REG(hw, ERT, 0x0100);
1731
1732         /* Enable Receives */
1733         E1000_WRITE_REG(hw, RCTL, rctl);
1734 }
1735
1736 /**
1737  * e1000_free_tx_resources - Free Tx Resources per Queue
1738  * @adapter: board private structure
1739  * @tx_ring: Tx descriptor ring for a specific queue
1740  *
1741  * Free all transmit software resources
1742  **/
1743
1744 void
1745 e1000_free_tx_resources(struct e1000_adapter *adapter,
1746                         struct e1000_tx_ring *tx_ring)
1747 {
1748         struct pci_dev *pdev = adapter->pdev;
1749
1750         e1000_clean_tx_ring(adapter, tx_ring);
1751
1752         vfree(tx_ring->buffer_info);
1753         tx_ring->buffer_info = NULL;
1754
1755         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1756
1757         tx_ring->desc = NULL;
1758 }
1759
1760 /**
1761  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1762  * @adapter: board private structure
1763  *
1764  * Free all transmit software resources
1765  **/
1766
1767 void
1768 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1769 {
1770         int i;
1771
1772         for (i = 0; i < adapter->num_queues; i++)
1773                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1774 }
1775
1776 static inline void
1777 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1778                         struct e1000_buffer *buffer_info)
1779 {
1780         if(buffer_info->dma) {
1781                 pci_unmap_page(adapter->pdev,
1782                                 buffer_info->dma,
1783                                 buffer_info->length,
1784                                 PCI_DMA_TODEVICE);
1785                 buffer_info->dma = 0;
1786         }
1787         if(buffer_info->skb) {
1788                 dev_kfree_skb_any(buffer_info->skb);
1789                 buffer_info->skb = NULL;
1790         }
1791 }
1792
1793 /**
1794  * e1000_clean_tx_ring - Free Tx Buffers
1795  * @adapter: board private structure
1796  * @tx_ring: ring to be cleaned
1797  **/
1798
1799 static void
1800 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1801                     struct e1000_tx_ring *tx_ring)
1802 {
1803         struct e1000_buffer *buffer_info;
1804         unsigned long size;
1805         unsigned int i;
1806
1807         /* Free all the Tx ring sk_buffs */
1808
1809         if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
1810                 e1000_unmap_and_free_tx_resource(adapter,
1811                                 &tx_ring->previous_buffer_info);
1812         }
1813
1814         for(i = 0; i < tx_ring->count; i++) {
1815                 buffer_info = &tx_ring->buffer_info[i];
1816                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1817         }
1818
1819         size = sizeof(struct e1000_buffer) * tx_ring->count;
1820         memset(tx_ring->buffer_info, 0, size);
1821
1822         /* Zero out the descriptor ring */
1823
1824         memset(tx_ring->desc, 0, tx_ring->size);
1825
1826         tx_ring->next_to_use = 0;
1827         tx_ring->next_to_clean = 0;
1828
1829         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1830         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1831 }
1832
1833 /**
1834  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1835  * @adapter: board private structure
1836  **/
1837
1838 static void
1839 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1840 {
1841         int i;
1842
1843         for (i = 0; i < adapter->num_queues; i++)
1844                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1845 }
1846
1847 /**
1848  * e1000_free_rx_resources - Free Rx Resources
1849  * @adapter: board private structure
1850  * @rx_ring: ring to clean the resources from
1851  *
1852  * Free all receive software resources
1853  **/
1854
1855 void
1856 e1000_free_rx_resources(struct e1000_adapter *adapter,
1857                         struct e1000_rx_ring *rx_ring)
1858 {
1859         struct pci_dev *pdev = adapter->pdev;
1860
1861         e1000_clean_rx_ring(adapter, rx_ring);
1862
1863         vfree(rx_ring->buffer_info);
1864         rx_ring->buffer_info = NULL;
1865         kfree(rx_ring->ps_page);
1866         rx_ring->ps_page = NULL;
1867         kfree(rx_ring->ps_page_dma);
1868         rx_ring->ps_page_dma = NULL;
1869
1870         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1871
1872         rx_ring->desc = NULL;
1873 }
1874
1875 /**
1876  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1877  * @adapter: board private structure
1878  *
1879  * Free all receive software resources
1880  **/
1881
1882 void
1883 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1884 {
1885         int i;
1886
1887         for (i = 0; i < adapter->num_queues; i++)
1888                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1889 }
1890
1891 /**
1892  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1893  * @adapter: board private structure
1894  * @rx_ring: ring to free buffers from
1895  **/
1896
1897 static void
1898 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1899                     struct e1000_rx_ring *rx_ring)
1900 {
1901         struct e1000_buffer *buffer_info;
1902         struct e1000_ps_page *ps_page;
1903         struct e1000_ps_page_dma *ps_page_dma;
1904         struct pci_dev *pdev = adapter->pdev;
1905         unsigned long size;
1906         unsigned int i, j;
1907
1908         /* Free all the Rx ring sk_buffs */
1909
1910         for(i = 0; i < rx_ring->count; i++) {
1911                 buffer_info = &rx_ring->buffer_info[i];
1912                 if(buffer_info->skb) {
1913                         ps_page = &rx_ring->ps_page[i];
1914                         ps_page_dma = &rx_ring->ps_page_dma[i];
1915                         pci_unmap_single(pdev,
1916                                          buffer_info->dma,
1917                                          buffer_info->length,
1918                                          PCI_DMA_FROMDEVICE);
1919
1920                         dev_kfree_skb(buffer_info->skb);
1921                         buffer_info->skb = NULL;
1922
1923                         for(j = 0; j < adapter->rx_ps_pages; j++) {
1924                                 if(!ps_page->ps_page[j]) break;
1925                                 pci_unmap_single(pdev,
1926                                                  ps_page_dma->ps_page_dma[j],
1927                                                  PAGE_SIZE, PCI_DMA_FROMDEVICE);
1928                                 ps_page_dma->ps_page_dma[j] = 0;
1929                                 put_page(ps_page->ps_page[j]);
1930                                 ps_page->ps_page[j] = NULL;
1931                         }
1932                 }
1933         }
1934
1935         size = sizeof(struct e1000_buffer) * rx_ring->count;
1936         memset(rx_ring->buffer_info, 0, size);
1937         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1938         memset(rx_ring->ps_page, 0, size);
1939         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1940         memset(rx_ring->ps_page_dma, 0, size);
1941
1942         /* Zero out the descriptor ring */
1943
1944         memset(rx_ring->desc, 0, rx_ring->size);
1945
1946         rx_ring->next_to_clean = 0;
1947         rx_ring->next_to_use = 0;
1948
1949         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1950         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1951 }
1952
1953 /**
1954  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
1955  * @adapter: board private structure
1956  **/
1957
1958 static void
1959 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
1960 {
1961         int i;
1962
1963         for (i = 0; i < adapter->num_queues; i++)
1964                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1965 }
1966
1967 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1968  * and memory write and invalidate disabled for certain operations
1969  */
1970 static void
1971 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1972 {
1973         struct net_device *netdev = adapter->netdev;
1974         uint32_t rctl;
1975
1976         e1000_pci_clear_mwi(&adapter->hw);
1977
1978         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1979         rctl |= E1000_RCTL_RST;
1980         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1981         E1000_WRITE_FLUSH(&adapter->hw);
1982         mdelay(5);
1983
1984         if(netif_running(netdev))
1985                 e1000_clean_all_rx_rings(adapter);
1986 }
1987
1988 static void
1989 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1990 {
1991         struct net_device *netdev = adapter->netdev;
1992         uint32_t rctl;
1993
1994         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1995         rctl &= ~E1000_RCTL_RST;
1996         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1997         E1000_WRITE_FLUSH(&adapter->hw);
1998         mdelay(5);
1999
2000         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2001                 e1000_pci_set_mwi(&adapter->hw);
2002
2003         if(netif_running(netdev)) {
2004                 e1000_configure_rx(adapter);
2005                 e1000_alloc_rx_buffers(adapter, &adapter->rx_ring[0]);
2006         }
2007 }
2008
2009 /**
2010  * e1000_set_mac - Change the Ethernet Address of the NIC
2011  * @netdev: network interface device structure
2012  * @p: pointer to an address structure
2013  *
2014  * Returns 0 on success, negative on failure
2015  **/
2016
2017 static int
2018 e1000_set_mac(struct net_device *netdev, void *p)
2019 {
2020         struct e1000_adapter *adapter = netdev_priv(netdev);
2021         struct sockaddr *addr = p;
2022
2023         if(!is_valid_ether_addr(addr->sa_data))
2024                 return -EADDRNOTAVAIL;
2025
2026         /* 82542 2.0 needs to be in reset to write receive address registers */
2027
2028         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2029                 e1000_enter_82542_rst(adapter);
2030
2031         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2032         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2033
2034         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2035
2036         /* With 82571 controllers, LAA may be overwritten (with the default)
2037          * due to controller reset from the other port. */
2038         if (adapter->hw.mac_type == e1000_82571) {
2039                 /* activate the work around */
2040                 adapter->hw.laa_is_present = 1;
2041
2042                 /* Hold a copy of the LAA in RAR[14] This is done so that
2043                  * between the time RAR[0] gets clobbered  and the time it
2044                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2045                  * of the RARs and no incoming packets directed to this port
2046                  * are dropped. Eventaully the LAA will be in RAR[0] and
2047                  * RAR[14] */
2048                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2049                                         E1000_RAR_ENTRIES - 1);
2050         }
2051
2052         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2053                 e1000_leave_82542_rst(adapter);
2054
2055         return 0;
2056 }
2057
2058 /**
2059  * e1000_set_multi - Multicast and Promiscuous mode set
2060  * @netdev: network interface device structure
2061  *
2062  * The set_multi entry point is called whenever the multicast address
2063  * list or the network interface flags are updated.  This routine is
2064  * responsible for configuring the hardware for proper multicast,
2065  * promiscuous mode, and all-multi behavior.
2066  **/
2067
2068 static void
2069 e1000_set_multi(struct net_device *netdev)
2070 {
2071         struct e1000_adapter *adapter = netdev_priv(netdev);
2072         struct e1000_hw *hw = &adapter->hw;
2073         struct dev_mc_list *mc_ptr;
2074         uint32_t rctl;
2075         uint32_t hash_value;
2076         int i, rar_entries = E1000_RAR_ENTRIES;
2077
2078         /* reserve RAR[14] for LAA over-write work-around */
2079         if (adapter->hw.mac_type == e1000_82571)
2080                 rar_entries--;
2081
2082         /* Check for Promiscuous and All Multicast modes */
2083
2084         rctl = E1000_READ_REG(hw, RCTL);
2085
2086         if(netdev->flags & IFF_PROMISC) {
2087                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2088         } else if(netdev->flags & IFF_ALLMULTI) {
2089                 rctl |= E1000_RCTL_MPE;
2090                 rctl &= ~E1000_RCTL_UPE;
2091         } else {
2092                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2093         }
2094
2095         E1000_WRITE_REG(hw, RCTL, rctl);
2096
2097         /* 82542 2.0 needs to be in reset to write receive address registers */
2098
2099         if(hw->mac_type == e1000_82542_rev2_0)
2100                 e1000_enter_82542_rst(adapter);
2101
2102         /* load the first 14 multicast address into the exact filters 1-14
2103          * RAR 0 is used for the station MAC adddress
2104          * if there are not 14 addresses, go ahead and clear the filters
2105          * -- with 82571 controllers only 0-13 entries are filled here
2106          */
2107         mc_ptr = netdev->mc_list;
2108
2109         for(i = 1; i < rar_entries; i++) {
2110                 if (mc_ptr) {
2111                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2112                         mc_ptr = mc_ptr->next;
2113                 } else {
2114                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2115                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2116                 }
2117         }
2118
2119         /* clear the old settings from the multicast hash table */
2120
2121         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2122                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2123
2124         /* load any remaining addresses into the hash table */
2125
2126         for(; mc_ptr; mc_ptr = mc_ptr->next) {
2127                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2128                 e1000_mta_set(hw, hash_value);
2129         }
2130
2131         if(hw->mac_type == e1000_82542_rev2_0)
2132                 e1000_leave_82542_rst(adapter);
2133 }
2134
2135 /* Need to wait a few seconds after link up to get diagnostic information from
2136  * the phy */
2137
2138 static void
2139 e1000_update_phy_info(unsigned long data)
2140 {
2141         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2142         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2143 }
2144
2145 /**
2146  * e1000_82547_tx_fifo_stall - Timer Call-back
2147  * @data: pointer to adapter cast into an unsigned long
2148  **/
2149
2150 static void
2151 e1000_82547_tx_fifo_stall(unsigned long data)
2152 {
2153         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2154         struct net_device *netdev = adapter->netdev;
2155         uint32_t tctl;
2156
2157         if(atomic_read(&adapter->tx_fifo_stall)) {
2158                 if((E1000_READ_REG(&adapter->hw, TDT) ==
2159                     E1000_READ_REG(&adapter->hw, TDH)) &&
2160                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2161                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2162                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2163                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2164                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2165                         E1000_WRITE_REG(&adapter->hw, TCTL,
2166                                         tctl & ~E1000_TCTL_EN);
2167                         E1000_WRITE_REG(&adapter->hw, TDFT,
2168                                         adapter->tx_head_addr);
2169                         E1000_WRITE_REG(&adapter->hw, TDFH,
2170                                         adapter->tx_head_addr);
2171                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2172                                         adapter->tx_head_addr);
2173                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2174                                         adapter->tx_head_addr);
2175                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2176                         E1000_WRITE_FLUSH(&adapter->hw);
2177
2178                         adapter->tx_fifo_head = 0;
2179                         atomic_set(&adapter->tx_fifo_stall, 0);
2180                         netif_wake_queue(netdev);
2181                 } else {
2182                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2183                 }
2184         }
2185 }
2186
2187 /**
2188  * e1000_watchdog - Timer Call-back
2189  * @data: pointer to adapter cast into an unsigned long
2190  **/
2191 static void
2192 e1000_watchdog(unsigned long data)
2193 {
2194         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2195
2196         /* Do the rest outside of interrupt context */
2197         schedule_work(&adapter->watchdog_task);
2198 }
2199
2200 static void
2201 e1000_watchdog_task(struct e1000_adapter *adapter)
2202 {
2203         struct net_device *netdev = adapter->netdev;
2204         struct e1000_tx_ring *txdr = &adapter->tx_ring[0];
2205         uint32_t link;
2206
2207         e1000_check_for_link(&adapter->hw);
2208         if (adapter->hw.mac_type == e1000_82573) {
2209                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2210                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2211                         e1000_update_mng_vlan(adapter);
2212         }
2213
2214         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2215            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2216                 link = !adapter->hw.serdes_link_down;
2217         else
2218                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2219
2220         if(link) {
2221                 if(!netif_carrier_ok(netdev)) {
2222                         e1000_get_speed_and_duplex(&adapter->hw,
2223                                                    &adapter->link_speed,
2224                                                    &adapter->link_duplex);
2225
2226                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2227                                adapter->link_speed,
2228                                adapter->link_duplex == FULL_DUPLEX ?
2229                                "Full Duplex" : "Half Duplex");
2230
2231                         netif_carrier_on(netdev);
2232                         netif_wake_queue(netdev);
2233                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2234                         adapter->smartspeed = 0;
2235                 }
2236         } else {
2237                 if(netif_carrier_ok(netdev)) {
2238                         adapter->link_speed = 0;
2239                         adapter->link_duplex = 0;
2240                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2241                         netif_carrier_off(netdev);
2242                         netif_stop_queue(netdev);
2243                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2244                 }
2245
2246                 e1000_smartspeed(adapter);
2247         }
2248
2249         e1000_update_stats(adapter);
2250
2251         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2252         adapter->tpt_old = adapter->stats.tpt;
2253         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2254         adapter->colc_old = adapter->stats.colc;
2255
2256         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2257         adapter->gorcl_old = adapter->stats.gorcl;
2258         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2259         adapter->gotcl_old = adapter->stats.gotcl;
2260
2261         e1000_update_adaptive(&adapter->hw);
2262
2263         if (adapter->num_queues == 1 && !netif_carrier_ok(netdev)) {
2264                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2265                         /* We've lost link, so the controller stops DMA,
2266                          * but we've got queued Tx work that's never going
2267                          * to get done, so reset controller to flush Tx.
2268                          * (Do the reset outside of interrupt context). */
2269                         schedule_work(&adapter->tx_timeout_task);
2270                 }
2271         }
2272
2273         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2274         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2275                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2276                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2277                  * else is between 2000-8000. */
2278                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2279                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2280                         adapter->gotcl - adapter->gorcl :
2281                         adapter->gorcl - adapter->gotcl) / 10000;
2282                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2283                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2284         }
2285
2286         /* Cause software interrupt to ensure rx ring is cleaned */
2287         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2288
2289         /* Force detection of hung controller every watchdog period */
2290         adapter->detect_tx_hung = TRUE;
2291
2292         /* With 82571 controllers, LAA may be overwritten due to controller
2293          * reset from the other port. Set the appropriate LAA in RAR[0] */
2294         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2295                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2296
2297         /* Reset the timer */
2298         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2299 }
2300
2301 #define E1000_TX_FLAGS_CSUM             0x00000001
2302 #define E1000_TX_FLAGS_VLAN             0x00000002
2303 #define E1000_TX_FLAGS_TSO              0x00000004
2304 #define E1000_TX_FLAGS_IPV4             0x00000008
2305 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2306 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2307
2308 static inline int
2309 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2310           struct sk_buff *skb)
2311 {
2312 #ifdef NETIF_F_TSO
2313         struct e1000_context_desc *context_desc;
2314         unsigned int i;
2315         uint32_t cmd_length = 0;
2316         uint16_t ipcse = 0, tucse, mss;
2317         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2318         int err;
2319
2320         if(skb_shinfo(skb)->tso_size) {
2321                 if (skb_header_cloned(skb)) {
2322                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2323                         if (err)
2324                                 return err;
2325                 }
2326
2327                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2328                 mss = skb_shinfo(skb)->tso_size;
2329                 if(skb->protocol == ntohs(ETH_P_IP)) {
2330                         skb->nh.iph->tot_len = 0;
2331                         skb->nh.iph->check = 0;
2332                         skb->h.th->check =
2333                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2334                                                    skb->nh.iph->daddr,
2335                                                    0,
2336                                                    IPPROTO_TCP,
2337                                                    0);
2338                         cmd_length = E1000_TXD_CMD_IP;
2339                         ipcse = skb->h.raw - skb->data - 1;
2340 #ifdef NETIF_F_TSO_IPV6
2341                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2342                         skb->nh.ipv6h->payload_len = 0;
2343                         skb->h.th->check =
2344                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2345                                                  &skb->nh.ipv6h->daddr,
2346                                                  0,
2347                                                  IPPROTO_TCP,
2348                                                  0);
2349                         ipcse = 0;
2350 #endif
2351                 }
2352                 ipcss = skb->nh.raw - skb->data;
2353                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2354                 tucss = skb->h.raw - skb->data;
2355                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2356                 tucse = 0;
2357
2358                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2359                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2360
2361                 i = tx_ring->next_to_use;
2362                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2363
2364                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2365                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2366                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2367                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2368                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2369                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2370                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2371                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2372                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2373
2374                 if (++i == tx_ring->count) i = 0;
2375                 tx_ring->next_to_use = i;
2376
2377                 return 1;
2378         }
2379 #endif
2380
2381         return 0;
2382 }
2383
2384 static inline boolean_t
2385 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2386               struct sk_buff *skb)
2387 {
2388         struct e1000_context_desc *context_desc;
2389         unsigned int i;
2390         uint8_t css;
2391
2392         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2393                 css = skb->h.raw - skb->data;
2394
2395                 i = tx_ring->next_to_use;
2396                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2397
2398                 context_desc->upper_setup.tcp_fields.tucss = css;
2399                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2400                 context_desc->upper_setup.tcp_fields.tucse = 0;
2401                 context_desc->tcp_seg_setup.data = 0;
2402                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2403
2404                 if (unlikely(++i == tx_ring->count)) i = 0;
2405                 tx_ring->next_to_use = i;
2406
2407                 return TRUE;
2408         }
2409
2410         return FALSE;
2411 }
2412
2413 #define E1000_MAX_TXD_PWR       12
2414 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2415
2416 static inline int
2417 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2418              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2419              unsigned int nr_frags, unsigned int mss)
2420 {
2421         struct e1000_buffer *buffer_info;
2422         unsigned int len = skb->len;
2423         unsigned int offset = 0, size, count = 0, i;
2424         unsigned int f;
2425         len -= skb->data_len;
2426
2427         i = tx_ring->next_to_use;
2428
2429         while(len) {
2430                 buffer_info = &tx_ring->buffer_info[i];
2431                 size = min(len, max_per_txd);
2432 #ifdef NETIF_F_TSO
2433                 /* Workaround for premature desc write-backs
2434                  * in TSO mode.  Append 4-byte sentinel desc */
2435                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2436                         size -= 4;
2437 #endif
2438                 /* work-around for errata 10 and it applies
2439                  * to all controllers in PCI-X mode
2440                  * The fix is to make sure that the first descriptor of a
2441                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2442                  */
2443                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2444                                 (size > 2015) && count == 0))
2445                         size = 2015;
2446
2447                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2448                  * terminating buffers within evenly-aligned dwords. */
2449                 if(unlikely(adapter->pcix_82544 &&
2450                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2451                    size > 4))
2452                         size -= 4;
2453
2454                 buffer_info->length = size;
2455                 buffer_info->dma =
2456                         pci_map_single(adapter->pdev,
2457                                 skb->data + offset,
2458                                 size,
2459                                 PCI_DMA_TODEVICE);
2460                 buffer_info->time_stamp = jiffies;
2461
2462                 len -= size;
2463                 offset += size;
2464                 count++;
2465                 if(unlikely(++i == tx_ring->count)) i = 0;
2466         }
2467
2468         for(f = 0; f < nr_frags; f++) {
2469                 struct skb_frag_struct *frag;
2470
2471                 frag = &skb_shinfo(skb)->frags[f];
2472                 len = frag->size;
2473                 offset = frag->page_offset;
2474
2475                 while(len) {
2476                         buffer_info = &tx_ring->buffer_info[i];
2477                         size = min(len, max_per_txd);
2478 #ifdef NETIF_F_TSO
2479                         /* Workaround for premature desc write-backs
2480                          * in TSO mode.  Append 4-byte sentinel desc */
2481                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2482                                 size -= 4;
2483 #endif
2484                         /* Workaround for potential 82544 hang in PCI-X.
2485                          * Avoid terminating buffers within evenly-aligned
2486                          * dwords. */
2487                         if(unlikely(adapter->pcix_82544 &&
2488                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2489                            size > 4))
2490                                 size -= 4;
2491
2492                         buffer_info->length = size;
2493                         buffer_info->dma =
2494                                 pci_map_page(adapter->pdev,
2495                                         frag->page,
2496                                         offset,
2497                                         size,
2498                                         PCI_DMA_TODEVICE);
2499                         buffer_info->time_stamp = jiffies;
2500
2501                         len -= size;
2502                         offset += size;
2503                         count++;
2504                         if(unlikely(++i == tx_ring->count)) i = 0;
2505                 }
2506         }
2507
2508         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2509         tx_ring->buffer_info[i].skb = skb;
2510         tx_ring->buffer_info[first].next_to_watch = i;
2511
2512         return count;
2513 }
2514
2515 static inline void
2516 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2517                int tx_flags, int count)
2518 {
2519         struct e1000_tx_desc *tx_desc = NULL;
2520         struct e1000_buffer *buffer_info;
2521         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2522         unsigned int i;
2523
2524         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2525                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2526                              E1000_TXD_CMD_TSE;
2527                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2528
2529                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2530                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2531         }
2532
2533         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2534                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2535                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2536         }
2537
2538         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2539                 txd_lower |= E1000_TXD_CMD_VLE;
2540                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2541         }
2542
2543         i = tx_ring->next_to_use;
2544
2545         while(count--) {
2546                 buffer_info = &tx_ring->buffer_info[i];
2547                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2548                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2549                 tx_desc->lower.data =
2550                         cpu_to_le32(txd_lower | buffer_info->length);
2551                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2552                 if(unlikely(++i == tx_ring->count)) i = 0;
2553         }
2554
2555         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2556
2557         /* Force memory writes to complete before letting h/w
2558          * know there are new descriptors to fetch.  (Only
2559          * applicable for weak-ordered memory model archs,
2560          * such as IA-64). */
2561         wmb();
2562
2563         tx_ring->next_to_use = i;
2564         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2565 }
2566
2567 /**
2568  * 82547 workaround to avoid controller hang in half-duplex environment.
2569  * The workaround is to avoid queuing a large packet that would span
2570  * the internal Tx FIFO ring boundary by notifying the stack to resend
2571  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2572  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2573  * to the beginning of the Tx FIFO.
2574  **/
2575
2576 #define E1000_FIFO_HDR                  0x10
2577 #define E1000_82547_PAD_LEN             0x3E0
2578
2579 static inline int
2580 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2581 {
2582         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2583         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2584
2585         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2586
2587         if(adapter->link_duplex != HALF_DUPLEX)
2588                 goto no_fifo_stall_required;
2589
2590         if(atomic_read(&adapter->tx_fifo_stall))
2591                 return 1;
2592
2593         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2594                 atomic_set(&adapter->tx_fifo_stall, 1);
2595                 return 1;
2596         }
2597
2598 no_fifo_stall_required:
2599         adapter->tx_fifo_head += skb_fifo_len;
2600         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2601                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2602         return 0;
2603 }
2604
2605 #define MINIMUM_DHCP_PACKET_SIZE 282
2606 static inline int
2607 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2608 {
2609         struct e1000_hw *hw =  &adapter->hw;
2610         uint16_t length, offset;
2611         if(vlan_tx_tag_present(skb)) {
2612                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2613                         ( adapter->hw.mng_cookie.status &
2614                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2615                         return 0;
2616         }
2617         if(htons(ETH_P_IP) == skb->protocol) {
2618                 const struct iphdr *ip = skb->nh.iph;
2619                 if(IPPROTO_UDP == ip->protocol) {
2620                         struct udphdr *udp = (struct udphdr *)(skb->h.uh);
2621                         if(ntohs(udp->dest) == 67) {
2622                                 offset = (uint8_t *)udp + 8 - skb->data;
2623                                 length = skb->len - offset;
2624
2625                                 return e1000_mng_write_dhcp_info(hw,
2626                                                 (uint8_t *)udp + 8, length);
2627                         }
2628                 }
2629         } else if((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2630                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2631                 if((htons(ETH_P_IP) == eth->h_proto)) {
2632                         const struct iphdr *ip =
2633                                 (struct iphdr *)((uint8_t *)skb->data+14);
2634                         if(IPPROTO_UDP == ip->protocol) {
2635                                 struct udphdr *udp =
2636                                         (struct udphdr *)((uint8_t *)ip +
2637                                                 (ip->ihl << 2));
2638                                 if(ntohs(udp->dest) == 67) {
2639                                         offset = (uint8_t *)udp + 8 - skb->data;
2640                                         length = skb->len - offset;
2641
2642                                         return e1000_mng_write_dhcp_info(hw,
2643                                                         (uint8_t *)udp + 8,
2644                                                         length);
2645                                 }
2646                         }
2647                 }
2648         }
2649         return 0;
2650 }
2651
2652 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2653 static int
2654 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2655 {
2656         struct e1000_adapter *adapter = netdev_priv(netdev);
2657         struct e1000_tx_ring *tx_ring;
2658         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2659         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2660         unsigned int tx_flags = 0;
2661         unsigned int len = skb->len;
2662         unsigned long flags;
2663         unsigned int nr_frags = 0;
2664         unsigned int mss = 0;
2665         int count = 0;
2666         int tso;
2667         unsigned int f;
2668         len -= skb->data_len;
2669
2670 #ifdef CONFIG_E1000_MQ
2671         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2672 #else
2673         tx_ring = adapter->tx_ring;
2674 #endif
2675
2676         if (unlikely(skb->len <= 0)) {
2677                 dev_kfree_skb_any(skb);
2678                 return NETDEV_TX_OK;
2679         }
2680
2681 #ifdef NETIF_F_TSO
2682         mss = skb_shinfo(skb)->tso_size;
2683         /* The controller does a simple calculation to
2684          * make sure there is enough room in the FIFO before
2685          * initiating the DMA for each buffer.  The calc is:
2686          * 4 = ceil(buffer len/mss).  To make sure we don't
2687          * overrun the FIFO, adjust the max buffer len if mss
2688          * drops. */
2689         if(mss) {
2690                 max_per_txd = min(mss << 2, max_per_txd);
2691                 max_txd_pwr = fls(max_per_txd) - 1;
2692         }
2693
2694         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2695                 count++;
2696         count++;
2697 #else
2698         if(skb->ip_summed == CHECKSUM_HW)
2699                 count++;
2700 #endif
2701         count += TXD_USE_COUNT(len, max_txd_pwr);
2702
2703         if(adapter->pcix_82544)
2704                 count++;
2705
2706         /* work-around for errata 10 and it applies to all controllers
2707          * in PCI-X mode, so add one more descriptor to the count
2708          */
2709         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2710                         (len > 2015)))
2711                 count++;
2712
2713         nr_frags = skb_shinfo(skb)->nr_frags;
2714         for(f = 0; f < nr_frags; f++)
2715                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2716                                        max_txd_pwr);
2717         if(adapter->pcix_82544)
2718                 count += nr_frags;
2719
2720 #ifdef NETIF_F_TSO
2721         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2722          * points to just header, pull a few bytes of payload from
2723          * frags into skb->data */
2724         if (skb_shinfo(skb)->tso_size) {
2725                 uint8_t hdr_len;
2726                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2727                 if (skb->data_len && (hdr_len < (skb->len - skb->data_len)) &&
2728                         (adapter->hw.mac_type == e1000_82571 ||
2729                         adapter->hw.mac_type == e1000_82572)) {
2730                         unsigned int pull_size;
2731                         pull_size = min((unsigned int)4, skb->data_len);
2732                         if (!__pskb_pull_tail(skb, pull_size)) {
2733                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2734                                 dev_kfree_skb_any(skb);
2735                                 return -EFAULT;
2736                         }
2737                 }
2738         }
2739 #endif
2740
2741         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2742                 e1000_transfer_dhcp_info(adapter, skb);
2743
2744         local_irq_save(flags);
2745         if (!spin_trylock(&tx_ring->tx_lock)) {
2746                 /* Collision - tell upper layer to requeue */
2747                 local_irq_restore(flags);
2748                 return NETDEV_TX_LOCKED;
2749         }
2750
2751         /* need: count + 2 desc gap to keep tail from touching
2752          * head, otherwise try next time */
2753         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2754                 netif_stop_queue(netdev);
2755                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2756                 return NETDEV_TX_BUSY;
2757         }
2758
2759         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2760                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2761                         netif_stop_queue(netdev);
2762                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2763                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2764                         return NETDEV_TX_BUSY;
2765                 }
2766         }
2767
2768         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2769                 tx_flags |= E1000_TX_FLAGS_VLAN;
2770                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2771         }
2772
2773         first = tx_ring->next_to_use;
2774
2775         tso = e1000_tso(adapter, tx_ring, skb);
2776         if (tso < 0) {
2777                 dev_kfree_skb_any(skb);
2778                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2779                 return NETDEV_TX_OK;
2780         }
2781
2782         if (likely(tso))
2783                 tx_flags |= E1000_TX_FLAGS_TSO;
2784         else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2785                 tx_flags |= E1000_TX_FLAGS_CSUM;
2786
2787         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2788          * 82571 hardware supports TSO capabilities for IPv6 as well...
2789          * no longer assume, we must. */
2790         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2791                 tx_flags |= E1000_TX_FLAGS_IPV4;
2792
2793         e1000_tx_queue(adapter, tx_ring, tx_flags,
2794                        e1000_tx_map(adapter, tx_ring, skb, first,
2795                                     max_per_txd, nr_frags, mss));
2796
2797         netdev->trans_start = jiffies;
2798
2799         /* Make sure there is space in the ring for the next send. */
2800         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2801                 netif_stop_queue(netdev);
2802
2803         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2804         return NETDEV_TX_OK;
2805 }
2806
2807 /**
2808  * e1000_tx_timeout - Respond to a Tx Hang
2809  * @netdev: network interface device structure
2810  **/
2811
2812 static void
2813 e1000_tx_timeout(struct net_device *netdev)
2814 {
2815         struct e1000_adapter *adapter = netdev_priv(netdev);
2816
2817         /* Do the reset outside of interrupt context */
2818         schedule_work(&adapter->tx_timeout_task);
2819 }
2820
2821 static void
2822 e1000_tx_timeout_task(struct net_device *netdev)
2823 {
2824         struct e1000_adapter *adapter = netdev_priv(netdev);
2825
2826         e1000_down(adapter);
2827         e1000_up(adapter);
2828 }
2829
2830 /**
2831  * e1000_get_stats - Get System Network Statistics
2832  * @netdev: network interface device structure
2833  *
2834  * Returns the address of the device statistics structure.
2835  * The statistics are actually updated from the timer callback.
2836  **/
2837
2838 static struct net_device_stats *
2839 e1000_get_stats(struct net_device *netdev)
2840 {
2841         struct e1000_adapter *adapter = netdev_priv(netdev);
2842
2843         e1000_update_stats(adapter);
2844         return &adapter->net_stats;
2845 }
2846
2847 /**
2848  * e1000_change_mtu - Change the Maximum Transfer Unit
2849  * @netdev: network interface device structure
2850  * @new_mtu: new value for maximum frame size
2851  *
2852  * Returns 0 on success, negative on failure
2853  **/
2854
2855 static int
2856 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2857 {
2858         struct e1000_adapter *adapter = netdev_priv(netdev);
2859         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2860
2861         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2862                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2863                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2864                         return -EINVAL;
2865         }
2866
2867 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2868         /* might want this to be bigger enum check... */
2869         /* 82571 controllers limit jumbo frame size to 10500 bytes */
2870         if ((adapter->hw.mac_type == e1000_82571 ||
2871              adapter->hw.mac_type == e1000_82572) &&
2872             max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2873                 DPRINTK(PROBE, ERR, "MTU > 9216 bytes not supported "
2874                                     "on 82571 and 82572 controllers.\n");
2875                 return -EINVAL;
2876         }
2877
2878         if(adapter->hw.mac_type == e1000_82573 &&
2879             max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2880                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2881                                     "on 82573\n");
2882                 return -EINVAL;
2883         }
2884
2885         if(adapter->hw.mac_type > e1000_82547_rev_2) {
2886                 adapter->rx_buffer_len = max_frame;
2887                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
2888         } else {
2889                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
2890                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
2891                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2892                                             "on 82542\n");
2893                         return -EINVAL;
2894
2895                 } else {
2896                         if(max_frame <= E1000_RXBUFFER_2048) {
2897                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2898                         } else if(max_frame <= E1000_RXBUFFER_4096) {
2899                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2900                         } else if(max_frame <= E1000_RXBUFFER_8192) {
2901                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2902                         } else if(max_frame <= E1000_RXBUFFER_16384) {
2903                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2904                         }
2905                 }
2906         }
2907
2908         netdev->mtu = new_mtu;
2909
2910         if(netif_running(netdev)) {
2911                 e1000_down(adapter);
2912                 e1000_up(adapter);
2913         }
2914
2915         adapter->hw.max_frame_size = max_frame;
2916
2917         return 0;
2918 }
2919
2920 /**
2921  * e1000_update_stats - Update the board statistics counters
2922  * @adapter: board private structure
2923  **/
2924
2925 void
2926 e1000_update_stats(struct e1000_adapter *adapter)
2927 {
2928         struct e1000_hw *hw = &adapter->hw;
2929         unsigned long flags;
2930         uint16_t phy_tmp;
2931
2932 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2933
2934         spin_lock_irqsave(&adapter->stats_lock, flags);
2935
2936         /* these counters are modified from e1000_adjust_tbi_stats,
2937          * called from the interrupt context, so they must only
2938          * be written while holding adapter->stats_lock
2939          */
2940
2941         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2942         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2943         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2944         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2945         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2946         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2947         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2948         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2949         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2950         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2951         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2952         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2953         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2954
2955         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2956         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2957         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2958         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2959         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2960         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2961         adapter->stats.dc += E1000_READ_REG(hw, DC);
2962         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2963         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2964         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2965         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2966         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2967         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2968         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2969         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2970         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2971         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2972         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2973         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2974         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2975         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2976         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2977         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2978         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2979         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2980         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2981         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2982         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2983         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2984         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2985         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2986         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2987         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2988         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2989
2990         /* used for adaptive IFS */
2991
2992         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
2993         adapter->stats.tpt += hw->tx_packet_delta;
2994         hw->collision_delta = E1000_READ_REG(hw, COLC);
2995         adapter->stats.colc += hw->collision_delta;
2996
2997         if(hw->mac_type >= e1000_82543) {
2998                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
2999                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3000                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3001                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3002                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3003                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3004         }
3005         if(hw->mac_type > e1000_82547_rev_2) {
3006                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3007                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3008                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3009                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3010                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3011                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3012                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3013                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3014                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3015         }
3016
3017         /* Fill out the OS statistics structure */
3018
3019         adapter->net_stats.rx_packets = adapter->stats.gprc;
3020         adapter->net_stats.tx_packets = adapter->stats.gptc;
3021         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3022         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3023         adapter->net_stats.multicast = adapter->stats.mprc;
3024         adapter->net_stats.collisions = adapter->stats.colc;
3025
3026         /* Rx Errors */
3027
3028         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3029                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3030                 adapter->stats.rlec + adapter->stats.mpc +
3031                 adapter->stats.cexterr;
3032         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3033         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3034         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3035         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
3036         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3037
3038         /* Tx Errors */
3039
3040         adapter->net_stats.tx_errors = adapter->stats.ecol +
3041                                        adapter->stats.latecol;
3042         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3043         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3044         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3045
3046         /* Tx Dropped needs to be maintained elsewhere */
3047
3048         /* Phy Stats */
3049
3050         if(hw->media_type == e1000_media_type_copper) {
3051                 if((adapter->link_speed == SPEED_1000) &&
3052                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3053                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3054                         adapter->phy_stats.idle_errors += phy_tmp;
3055                 }
3056
3057                 if((hw->mac_type <= e1000_82546) &&
3058                    (hw->phy_type == e1000_phy_m88) &&
3059                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3060                         adapter->phy_stats.receive_errors += phy_tmp;
3061         }
3062
3063         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3064 }
3065
3066 #ifdef CONFIG_E1000_MQ
3067 void
3068 e1000_rx_schedule(void *data)
3069 {
3070         struct net_device *poll_dev, *netdev = data;
3071         struct e1000_adapter *adapter = netdev->priv;
3072         int this_cpu = get_cpu();
3073
3074         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3075         if (poll_dev == NULL) {
3076                 put_cpu();
3077                 return;
3078         }
3079
3080         if (likely(netif_rx_schedule_prep(poll_dev)))
3081                 __netif_rx_schedule(poll_dev);
3082         else
3083                 e1000_irq_enable(adapter);
3084
3085         put_cpu();
3086 }
3087 #endif
3088
3089 /**
3090  * e1000_intr - Interrupt Handler
3091  * @irq: interrupt number
3092  * @data: pointer to a network interface device structure
3093  * @pt_regs: CPU registers structure
3094  **/
3095
3096 static irqreturn_t
3097 e1000_intr(int irq, void *data, struct pt_regs *regs)
3098 {
3099         struct net_device *netdev = data;
3100         struct e1000_adapter *adapter = netdev_priv(netdev);
3101         struct e1000_hw *hw = &adapter->hw;
3102         uint32_t icr = E1000_READ_REG(hw, ICR);
3103 #ifdef CONFIG_E1000_MQ
3104         int i;
3105 #endif
3106
3107         if(unlikely(!icr))
3108                 return IRQ_NONE;  /* Not our interrupt */
3109
3110         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3111                 hw->get_link_status = 1;
3112                 mod_timer(&adapter->watchdog_timer, jiffies);
3113         }
3114
3115 #ifdef CONFIG_E1000_NAPI
3116         atomic_inc(&adapter->irq_sem);
3117         E1000_WRITE_REG(hw, IMC, ~0);
3118         E1000_WRITE_FLUSH(hw);
3119 #ifdef CONFIG_E1000_MQ
3120         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3121                 cpu_set(adapter->cpu_for_queue[0],
3122                         adapter->rx_sched_call_data.cpumask);
3123                 for (i = 1; i < adapter->num_queues; i++) {
3124                         cpu_set(adapter->cpu_for_queue[i],
3125                                 adapter->rx_sched_call_data.cpumask);
3126                         atomic_inc(&adapter->irq_sem);
3127                 }
3128                 atomic_set(&adapter->rx_sched_call_data.count, i);
3129                 smp_call_async_mask(&adapter->rx_sched_call_data);
3130         } else {
3131                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3132         }
3133 #else /* if !CONFIG_E1000_MQ */
3134         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3135                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3136         else
3137                 e1000_irq_enable(adapter);
3138 #endif /* CONFIG_E1000_MQ */
3139
3140 #else /* if !CONFIG_E1000_NAPI */
3141         /* Writing IMC and IMS is needed for 82547.
3142            Due to Hub Link bus being occupied, an interrupt
3143            de-assertion message is not able to be sent.
3144            When an interrupt assertion message is generated later,
3145            two messages are re-ordered and sent out.
3146            That causes APIC to think 82547 is in de-assertion
3147            state, while 82547 is in assertion state, resulting
3148            in dead lock. Writing IMC forces 82547 into
3149            de-assertion state.
3150         */
3151         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3152                 atomic_inc(&adapter->irq_sem);
3153                 E1000_WRITE_REG(hw, IMC, ~0);
3154         }
3155
3156         for(i = 0; i < E1000_MAX_INTR; i++)
3157                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3158                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3159                         break;
3160
3161         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3162                 e1000_irq_enable(adapter);
3163
3164 #endif /* CONFIG_E1000_NAPI */
3165
3166         return IRQ_HANDLED;
3167 }
3168
3169 #ifdef CONFIG_E1000_NAPI
3170 /**
3171  * e1000_clean - NAPI Rx polling callback
3172  * @adapter: board private structure
3173  **/
3174
3175 static int
3176 e1000_clean(struct net_device *poll_dev, int *budget)
3177 {
3178         struct e1000_adapter *adapter;
3179         int work_to_do = min(*budget, poll_dev->quota);
3180         int tx_cleaned, i = 0, work_done = 0;
3181
3182         /* Must NOT use netdev_priv macro here. */
3183         adapter = poll_dev->priv;
3184
3185         /* Keep link state information with original netdev */
3186         if (!netif_carrier_ok(adapter->netdev))
3187                 goto quit_polling;
3188
3189         while (poll_dev != &adapter->polling_netdev[i]) {
3190                 i++;
3191                 if (unlikely(i == adapter->num_queues))
3192                         BUG();
3193         }
3194
3195         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3196         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3197                           &work_done, work_to_do);
3198
3199         *budget -= work_done;
3200         poll_dev->quota -= work_done;
3201
3202         /* If no Tx and not enough Rx work done, exit the polling mode */
3203         if((!tx_cleaned && (work_done == 0)) ||
3204            !netif_running(adapter->netdev)) {
3205 quit_polling:
3206                 netif_rx_complete(poll_dev);
3207                 e1000_irq_enable(adapter);
3208                 return 0;
3209         }
3210
3211         return 1;
3212 }
3213
3214 #endif
3215 /**
3216  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3217  * @adapter: board private structure
3218  **/
3219
3220 static boolean_t
3221 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3222                    struct e1000_tx_ring *tx_ring)
3223 {
3224         struct net_device *netdev = adapter->netdev;
3225         struct e1000_tx_desc *tx_desc, *eop_desc;
3226         struct e1000_buffer *buffer_info;
3227         unsigned int i, eop;
3228         boolean_t cleaned = FALSE;
3229
3230         i = tx_ring->next_to_clean;
3231         eop = tx_ring->buffer_info[i].next_to_watch;
3232         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3233
3234         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3235                 /* Premature writeback of Tx descriptors clear (free buffers
3236                  * and unmap pci_mapping) previous_buffer_info */
3237                 if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
3238                         e1000_unmap_and_free_tx_resource(adapter,
3239                                         &tx_ring->previous_buffer_info);
3240                 }
3241
3242                 for(cleaned = FALSE; !cleaned; ) {
3243                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3244                         buffer_info = &tx_ring->buffer_info[i];
3245                         cleaned = (i == eop);
3246
3247 #ifdef NETIF_F_TSO
3248                         if (!(netdev->features & NETIF_F_TSO)) {
3249 #endif
3250                                 e1000_unmap_and_free_tx_resource(adapter,
3251                                                                  buffer_info);
3252 #ifdef NETIF_F_TSO
3253                         } else {
3254                                 if (cleaned) {
3255                                         memcpy(&tx_ring->previous_buffer_info,
3256                                                buffer_info,
3257                                                sizeof(struct e1000_buffer));
3258                                         memset(buffer_info, 0,
3259                                                sizeof(struct e1000_buffer));
3260                                 } else {
3261                                         e1000_unmap_and_free_tx_resource(
3262                                             adapter, buffer_info);
3263                                 }
3264                         }
3265 #endif
3266
3267                         tx_desc->buffer_addr = 0;
3268                         tx_desc->lower.data = 0;
3269                         tx_desc->upper.data = 0;
3270
3271                         if(unlikely(++i == tx_ring->count)) i = 0;
3272                 }
3273
3274                 tx_ring->pkt++;
3275
3276                 eop = tx_ring->buffer_info[i].next_to_watch;
3277                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3278         }
3279
3280         tx_ring->next_to_clean = i;
3281
3282         spin_lock(&tx_ring->tx_lock);
3283
3284         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3285                     netif_carrier_ok(netdev)))
3286                 netif_wake_queue(netdev);
3287
3288         spin_unlock(&tx_ring->tx_lock);
3289
3290         if (adapter->detect_tx_hung) {
3291                 /* Detect a transmit hang in hardware, this serializes the
3292                  * check with the clearing of time_stamp and movement of i */
3293                 adapter->detect_tx_hung = FALSE;
3294                 if (tx_ring->buffer_info[i].dma &&
3295                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
3296                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3297                         E1000_STATUS_TXOFF)) {
3298
3299                         /* detected Tx unit hang */
3300                         i = tx_ring->next_to_clean;
3301                         eop = tx_ring->buffer_info[i].next_to_watch;
3302                         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3303                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3304                                         "  TDH                  <%x>\n"
3305                                         "  TDT                  <%x>\n"
3306                                         "  next_to_use          <%x>\n"
3307                                         "  next_to_clean        <%x>\n"
3308                                         "buffer_info[next_to_clean]\n"
3309                                         "  dma                  <%llx>\n"
3310                                         "  time_stamp           <%lx>\n"
3311                                         "  next_to_watch        <%x>\n"
3312                                         "  jiffies              <%lx>\n"
3313                                         "  next_to_watch.status <%x>\n",
3314                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3315                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3316                                 tx_ring->next_to_use,
3317                                 i,
3318                                 (unsigned long long)tx_ring->buffer_info[i].dma,
3319                                 tx_ring->buffer_info[i].time_stamp,
3320                                 eop,
3321                                 jiffies,
3322                                 eop_desc->upper.fields.status);
3323                         netif_stop_queue(netdev);
3324                 }
3325         }
3326 #ifdef NETIF_F_TSO
3327         if (unlikely(!(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3328             time_after(jiffies, tx_ring->previous_buffer_info.time_stamp + HZ)))
3329                 e1000_unmap_and_free_tx_resource(
3330                     adapter, &tx_ring->previous_buffer_info);
3331 #endif
3332         return cleaned;
3333 }
3334
3335 /**
3336  * e1000_rx_checksum - Receive Checksum Offload for 82543
3337  * @adapter:     board private structure
3338  * @status_err:  receive descriptor status and error fields
3339  * @csum:        receive descriptor csum field
3340  * @sk_buff:     socket buffer with received data
3341  **/
3342
3343 static inline void
3344 e1000_rx_checksum(struct e1000_adapter *adapter,
3345                   uint32_t status_err, uint32_t csum,
3346                   struct sk_buff *skb)
3347 {
3348         uint16_t status = (uint16_t)status_err;
3349         uint8_t errors = (uint8_t)(status_err >> 24);
3350         skb->ip_summed = CHECKSUM_NONE;
3351
3352         /* 82543 or newer only */
3353         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3354         /* Ignore Checksum bit is set */
3355         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3356         /* TCP/UDP checksum error bit is set */
3357         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3358                 /* let the stack verify checksum errors */
3359                 adapter->hw_csum_err++;
3360                 return;
3361         }
3362         /* TCP/UDP Checksum has not been calculated */
3363         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3364                 if(!(status & E1000_RXD_STAT_TCPCS))
3365                         return;
3366         } else {
3367                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3368                         return;
3369         }
3370         /* It must be a TCP or UDP packet with a valid checksum */
3371         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3372                 /* TCP checksum is good */
3373                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3374         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3375                 /* IP fragment with UDP payload */
3376                 /* Hardware complements the payload checksum, so we undo it
3377                  * and then put the value in host order for further stack use.
3378                  */
3379                 csum = ntohl(csum ^ 0xFFFF);
3380                 skb->csum = csum;
3381                 skb->ip_summed = CHECKSUM_HW;
3382         }
3383         adapter->hw_csum_good++;
3384 }
3385
3386 /**
3387  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3388  * @adapter: board private structure
3389  **/
3390
3391 static boolean_t
3392 #ifdef CONFIG_E1000_NAPI
3393 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3394                    struct e1000_rx_ring *rx_ring,
3395                    int *work_done, int work_to_do)
3396 #else
3397 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3398                    struct e1000_rx_ring *rx_ring)
3399 #endif
3400 {
3401         struct net_device *netdev = adapter->netdev;
3402         struct pci_dev *pdev = adapter->pdev;
3403         struct e1000_rx_desc *rx_desc;
3404         struct e1000_buffer *buffer_info;
3405         struct sk_buff *skb;
3406         unsigned long flags;
3407         uint32_t length;
3408         uint8_t last_byte;
3409         unsigned int i;
3410         boolean_t cleaned = FALSE;
3411
3412         i = rx_ring->next_to_clean;
3413         rx_desc = E1000_RX_DESC(*rx_ring, i);
3414
3415         while(rx_desc->status & E1000_RXD_STAT_DD) {
3416                 buffer_info = &rx_ring->buffer_info[i];
3417 #ifdef CONFIG_E1000_NAPI
3418                 if(*work_done >= work_to_do)
3419                         break;
3420                 (*work_done)++;
3421 #endif
3422                 cleaned = TRUE;
3423
3424                 pci_unmap_single(pdev,
3425                                  buffer_info->dma,
3426                                  buffer_info->length,
3427                                  PCI_DMA_FROMDEVICE);
3428
3429                 skb = buffer_info->skb;
3430                 length = le16_to_cpu(rx_desc->length);
3431
3432                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3433                         /* All receives must fit into a single buffer */
3434                         E1000_DBG("%s: Receive packet consumed multiple"
3435                                   " buffers\n", netdev->name);
3436                         dev_kfree_skb_irq(skb);
3437                         goto next_desc;
3438                 }
3439
3440                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3441                         last_byte = *(skb->data + length - 1);
3442                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3443                                       rx_desc->errors, length, last_byte)) {
3444                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3445                                 e1000_tbi_adjust_stats(&adapter->hw,
3446                                                        &adapter->stats,
3447                                                        length, skb->data);
3448                                 spin_unlock_irqrestore(&adapter->stats_lock,
3449                                                        flags);
3450                                 length--;
3451                         } else {
3452                                 dev_kfree_skb_irq(skb);
3453                                 goto next_desc;
3454                         }
3455                 }
3456
3457                 /* Good Receive */
3458                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3459
3460                 /* Receive Checksum Offload */
3461                 e1000_rx_checksum(adapter,
3462                                   (uint32_t)(rx_desc->status) |
3463                                   ((uint32_t)(rx_desc->errors) << 24),
3464                                   rx_desc->csum, skb);
3465                 skb->protocol = eth_type_trans(skb, netdev);
3466 #ifdef CONFIG_E1000_NAPI
3467                 if(unlikely(adapter->vlgrp &&
3468                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3469                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3470                                                  le16_to_cpu(rx_desc->special) &
3471                                                  E1000_RXD_SPC_VLAN_MASK);
3472                 } else {
3473                         netif_receive_skb(skb);
3474                 }
3475 #else /* CONFIG_E1000_NAPI */
3476                 if(unlikely(adapter->vlgrp &&
3477                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3478                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3479                                         le16_to_cpu(rx_desc->special) &
3480                                         E1000_RXD_SPC_VLAN_MASK);
3481                 } else {
3482                         netif_rx(skb);
3483                 }
3484 #endif /* CONFIG_E1000_NAPI */
3485                 netdev->last_rx = jiffies;
3486                 rx_ring->pkt++;
3487
3488 next_desc:
3489                 rx_desc->status = 0;
3490                 buffer_info->skb = NULL;
3491                 if(unlikely(++i == rx_ring->count)) i = 0;
3492
3493                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3494         }
3495         rx_ring->next_to_clean = i;
3496         adapter->alloc_rx_buf(adapter, rx_ring);
3497
3498         return cleaned;
3499 }
3500
3501 /**
3502  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3503  * @adapter: board private structure
3504  **/
3505
3506 static boolean_t
3507 #ifdef CONFIG_E1000_NAPI
3508 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3509                       struct e1000_rx_ring *rx_ring,
3510                       int *work_done, int work_to_do)
3511 #else
3512 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3513                       struct e1000_rx_ring *rx_ring)
3514 #endif
3515 {
3516         union e1000_rx_desc_packet_split *rx_desc;
3517         struct net_device *netdev = adapter->netdev;
3518         struct pci_dev *pdev = adapter->pdev;
3519         struct e1000_buffer *buffer_info;
3520         struct e1000_ps_page *ps_page;
3521         struct e1000_ps_page_dma *ps_page_dma;
3522         struct sk_buff *skb;
3523         unsigned int i, j;
3524         uint32_t length, staterr;
3525         boolean_t cleaned = FALSE;
3526
3527         i = rx_ring->next_to_clean;
3528         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3529         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3530
3531         while(staterr & E1000_RXD_STAT_DD) {
3532                 buffer_info = &rx_ring->buffer_info[i];
3533                 ps_page = &rx_ring->ps_page[i];
3534                 ps_page_dma = &rx_ring->ps_page_dma[i];
3535 #ifdef CONFIG_E1000_NAPI
3536                 if(unlikely(*work_done >= work_to_do))
3537                         break;
3538                 (*work_done)++;
3539 #endif
3540                 cleaned = TRUE;
3541                 pci_unmap_single(pdev, buffer_info->dma,
3542                                  buffer_info->length,
3543                                  PCI_DMA_FROMDEVICE);
3544
3545                 skb = buffer_info->skb;
3546
3547                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3548                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3549                                   " the full packet\n", netdev->name);
3550                         dev_kfree_skb_irq(skb);
3551                         goto next_desc;
3552                 }
3553
3554                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3555                         dev_kfree_skb_irq(skb);
3556                         goto next_desc;
3557                 }
3558
3559                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3560
3561                 if(unlikely(!length)) {
3562                         E1000_DBG("%s: Last part of the packet spanning"
3563                                   " multiple descriptors\n", netdev->name);
3564                         dev_kfree_skb_irq(skb);
3565                         goto next_desc;
3566                 }
3567
3568                 /* Good Receive */
3569                 skb_put(skb, length);
3570
3571                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3572                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3573                                 break;
3574
3575                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3576                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3577                         ps_page_dma->ps_page_dma[j] = 0;
3578                         skb_shinfo(skb)->frags[j].page =
3579                                 ps_page->ps_page[j];
3580                         ps_page->ps_page[j] = NULL;
3581                         skb_shinfo(skb)->frags[j].page_offset = 0;
3582                         skb_shinfo(skb)->frags[j].size = length;
3583                         skb_shinfo(skb)->nr_frags++;
3584                         skb->len += length;
3585                         skb->data_len += length;
3586                 }
3587
3588                 e1000_rx_checksum(adapter, staterr,
3589                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3590                 skb->protocol = eth_type_trans(skb, netdev);
3591
3592                 if(likely(rx_desc->wb.upper.header_status &
3593                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3594                         adapter->rx_hdr_split++;
3595 #ifdef HAVE_RX_ZERO_COPY
3596                         skb_shinfo(skb)->zero_copy = TRUE;
3597 #endif
3598                 }
3599 #ifdef CONFIG_E1000_NAPI
3600                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3601                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3602                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3603                                 E1000_RXD_SPC_VLAN_MASK);
3604                 } else {
3605                         netif_receive_skb(skb);
3606                 }
3607 #else /* CONFIG_E1000_NAPI */
3608                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3609                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3610                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3611                                 E1000_RXD_SPC_VLAN_MASK);
3612                 } else {
3613                         netif_rx(skb);
3614                 }
3615 #endif /* CONFIG_E1000_NAPI */
3616                 netdev->last_rx = jiffies;
3617                 rx_ring->pkt++;
3618
3619 next_desc:
3620                 rx_desc->wb.middle.status_error &= ~0xFF;
3621                 buffer_info->skb = NULL;
3622                 if(unlikely(++i == rx_ring->count)) i = 0;
3623
3624                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3625                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3626         }
3627         rx_ring->next_to_clean = i;
3628         adapter->alloc_rx_buf(adapter, rx_ring);
3629
3630         return cleaned;
3631 }
3632
3633 /**
3634  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3635  * @adapter: address of board private structure
3636  **/
3637
3638 static void
3639 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3640                        struct e1000_rx_ring *rx_ring)
3641 {
3642         struct net_device *netdev = adapter->netdev;
3643         struct pci_dev *pdev = adapter->pdev;
3644         struct e1000_rx_desc *rx_desc;
3645         struct e1000_buffer *buffer_info;
3646         struct sk_buff *skb;
3647         unsigned int i;
3648         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3649
3650         i = rx_ring->next_to_use;
3651         buffer_info = &rx_ring->buffer_info[i];
3652
3653         while(!buffer_info->skb) {
3654                 skb = dev_alloc_skb(bufsz);
3655
3656                 if(unlikely(!skb)) {
3657                         /* Better luck next round */
3658                         break;
3659                 }
3660
3661                 /* Fix for errata 23, can't cross 64kB boundary */
3662                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3663                         struct sk_buff *oldskb = skb;
3664                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3665                                              "at %p\n", bufsz, skb->data);
3666                         /* Try again, without freeing the previous */
3667                         skb = dev_alloc_skb(bufsz);
3668                         /* Failed allocation, critical failure */
3669                         if (!skb) {
3670                                 dev_kfree_skb(oldskb);
3671                                 break;
3672                         }
3673
3674                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3675                                 /* give up */
3676                                 dev_kfree_skb(skb);
3677                                 dev_kfree_skb(oldskb);
3678                                 break; /* while !buffer_info->skb */
3679                         } else {
3680                                 /* Use new allocation */
3681                                 dev_kfree_skb(oldskb);
3682                         }
3683                 }
3684                 /* Make buffer alignment 2 beyond a 16 byte boundary
3685                  * this will result in a 16 byte aligned IP header after
3686                  * the 14 byte MAC header is removed
3687                  */
3688                 skb_reserve(skb, NET_IP_ALIGN);
3689
3690                 skb->dev = netdev;
3691
3692                 buffer_info->skb = skb;
3693                 buffer_info->length = adapter->rx_buffer_len;
3694                 buffer_info->dma = pci_map_single(pdev,
3695                                                   skb->data,
3696                                                   adapter->rx_buffer_len,
3697                                                   PCI_DMA_FROMDEVICE);
3698
3699                 /* Fix for errata 23, can't cross 64kB boundary */
3700                 if (!e1000_check_64k_bound(adapter,
3701                                         (void *)(unsigned long)buffer_info->dma,
3702                                         adapter->rx_buffer_len)) {
3703                         DPRINTK(RX_ERR, ERR,
3704                                 "dma align check failed: %u bytes at %p\n",
3705                                 adapter->rx_buffer_len,
3706                                 (void *)(unsigned long)buffer_info->dma);
3707                         dev_kfree_skb(skb);
3708                         buffer_info->skb = NULL;
3709
3710                         pci_unmap_single(pdev, buffer_info->dma,
3711                                          adapter->rx_buffer_len,
3712                                          PCI_DMA_FROMDEVICE);
3713
3714                         break; /* while !buffer_info->skb */
3715                 }
3716                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3717                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3718
3719                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3720                         /* Force memory writes to complete before letting h/w
3721                          * know there are new descriptors to fetch.  (Only
3722                          * applicable for weak-ordered memory model archs,
3723                          * such as IA-64). */
3724                         wmb();
3725                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3726                 }
3727
3728                 if(unlikely(++i == rx_ring->count)) i = 0;
3729                 buffer_info = &rx_ring->buffer_info[i];
3730         }
3731
3732         rx_ring->next_to_use = i;
3733 }
3734
3735 /**
3736  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3737  * @adapter: address of board private structure
3738  **/
3739
3740 static void
3741 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3742                           struct e1000_rx_ring *rx_ring)
3743 {
3744         struct net_device *netdev = adapter->netdev;
3745         struct pci_dev *pdev = adapter->pdev;
3746         union e1000_rx_desc_packet_split *rx_desc;
3747         struct e1000_buffer *buffer_info;
3748         struct e1000_ps_page *ps_page;
3749         struct e1000_ps_page_dma *ps_page_dma;
3750         struct sk_buff *skb;
3751         unsigned int i, j;
3752
3753         i = rx_ring->next_to_use;
3754         buffer_info = &rx_ring->buffer_info[i];
3755         ps_page = &rx_ring->ps_page[i];
3756         ps_page_dma = &rx_ring->ps_page_dma[i];
3757
3758         while(!buffer_info->skb) {
3759                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3760
3761                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3762                         if (j < adapter->rx_ps_pages) {
3763                                 if (likely(!ps_page->ps_page[j])) {
3764                                         ps_page->ps_page[j] =
3765                                                 alloc_page(GFP_ATOMIC);
3766                                         if (unlikely(!ps_page->ps_page[j]))
3767                                                 goto no_buffers;
3768                                         ps_page_dma->ps_page_dma[j] =
3769                                                 pci_map_page(pdev,
3770                                                             ps_page->ps_page[j],
3771                                                             0, PAGE_SIZE,
3772                                                             PCI_DMA_FROMDEVICE);
3773                                 }
3774                                 /* Refresh the desc even if buffer_addrs didn't
3775                                  * change because each write-back erases
3776                                  * this info.
3777                                  */
3778                                 rx_desc->read.buffer_addr[j+1] =
3779                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3780                         } else
3781                                 rx_desc->read.buffer_addr[j+1] = ~0;
3782                 }
3783
3784                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3785
3786                 if(unlikely(!skb))
3787                         break;
3788
3789                 /* Make buffer alignment 2 beyond a 16 byte boundary
3790                  * this will result in a 16 byte aligned IP header after
3791                  * the 14 byte MAC header is removed
3792                  */
3793                 skb_reserve(skb, NET_IP_ALIGN);
3794
3795                 skb->dev = netdev;
3796
3797                 buffer_info->skb = skb;
3798                 buffer_info->length = adapter->rx_ps_bsize0;
3799                 buffer_info->dma = pci_map_single(pdev, skb->data,
3800                                                   adapter->rx_ps_bsize0,
3801                                                   PCI_DMA_FROMDEVICE);
3802
3803                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3804
3805                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3806                         /* Force memory writes to complete before letting h/w
3807                          * know there are new descriptors to fetch.  (Only
3808                          * applicable for weak-ordered memory model archs,
3809                          * such as IA-64). */
3810                         wmb();
3811                         /* Hardware increments by 16 bytes, but packet split
3812                          * descriptors are 32 bytes...so we increment tail
3813                          * twice as much.
3814                          */
3815                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3816                 }
3817
3818                 if(unlikely(++i == rx_ring->count)) i = 0;
3819                 buffer_info = &rx_ring->buffer_info[i];
3820                 ps_page = &rx_ring->ps_page[i];
3821                 ps_page_dma = &rx_ring->ps_page_dma[i];
3822         }
3823
3824 no_buffers:
3825         rx_ring->next_to_use = i;
3826 }
3827
3828 /**
3829  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3830  * @adapter:
3831  **/
3832
3833 static void
3834 e1000_smartspeed(struct e1000_adapter *adapter)
3835 {
3836         uint16_t phy_status;
3837         uint16_t phy_ctrl;
3838
3839         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3840            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3841                 return;
3842
3843         if(adapter->smartspeed == 0) {
3844                 /* If Master/Slave config fault is asserted twice,
3845                  * we assume back-to-back */
3846                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3847                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3848                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3849                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3850                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3851                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3852                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3853                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3854                                             phy_ctrl);
3855                         adapter->smartspeed++;
3856                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3857                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3858                                                &phy_ctrl)) {
3859                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3860                                              MII_CR_RESTART_AUTO_NEG);
3861                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3862                                                     phy_ctrl);
3863                         }
3864                 }
3865                 return;
3866         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
3867                 /* If still no link, perhaps using 2/3 pair cable */
3868                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3869                 phy_ctrl |= CR_1000T_MS_ENABLE;
3870                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
3871                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3872                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
3873                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3874                                      MII_CR_RESTART_AUTO_NEG);
3875                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
3876                 }
3877         }
3878         /* Restart process after E1000_SMARTSPEED_MAX iterations */
3879         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
3880                 adapter->smartspeed = 0;
3881 }
3882
3883 /**
3884  * e1000_ioctl -
3885  * @netdev:
3886  * @ifreq:
3887  * @cmd:
3888  **/
3889
3890 static int
3891 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3892 {
3893         switch (cmd) {
3894         case SIOCGMIIPHY:
3895         case SIOCGMIIREG:
3896         case SIOCSMIIREG:
3897                 return e1000_mii_ioctl(netdev, ifr, cmd);
3898         default:
3899                 return -EOPNOTSUPP;
3900         }
3901 }
3902
3903 /**
3904  * e1000_mii_ioctl -
3905  * @netdev:
3906  * @ifreq:
3907  * @cmd:
3908  **/
3909
3910 static int
3911 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3912 {
3913         struct e1000_adapter *adapter = netdev_priv(netdev);
3914         struct mii_ioctl_data *data = if_mii(ifr);
3915         int retval;
3916         uint16_t mii_reg;
3917         uint16_t spddplx;
3918         unsigned long flags;
3919
3920         if(adapter->hw.media_type != e1000_media_type_copper)
3921                 return -EOPNOTSUPP;
3922
3923         switch (cmd) {
3924         case SIOCGMIIPHY:
3925                 data->phy_id = adapter->hw.phy_addr;
3926                 break;
3927         case SIOCGMIIREG:
3928                 if(!capable(CAP_NET_ADMIN))
3929                         return -EPERM;
3930                 spin_lock_irqsave(&adapter->stats_lock, flags);
3931                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
3932                                    &data->val_out)) {
3933                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3934                         return -EIO;
3935                 }
3936                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3937                 break;
3938         case SIOCSMIIREG:
3939                 if(!capable(CAP_NET_ADMIN))
3940                         return -EPERM;
3941                 if(data->reg_num & ~(0x1F))
3942                         return -EFAULT;
3943                 mii_reg = data->val_in;
3944                 spin_lock_irqsave(&adapter->stats_lock, flags);
3945                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
3946                                         mii_reg)) {
3947                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3948                         return -EIO;
3949                 }
3950                 if(adapter->hw.phy_type == e1000_phy_m88) {
3951                         switch (data->reg_num) {
3952                         case PHY_CTRL:
3953                                 if(mii_reg & MII_CR_POWER_DOWN)
3954                                         break;
3955                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
3956                                         adapter->hw.autoneg = 1;
3957                                         adapter->hw.autoneg_advertised = 0x2F;
3958                                 } else {
3959                                         if (mii_reg & 0x40)
3960                                                 spddplx = SPEED_1000;
3961                                         else if (mii_reg & 0x2000)
3962                                                 spddplx = SPEED_100;
3963                                         else
3964                                                 spddplx = SPEED_10;
3965                                         spddplx += (mii_reg & 0x100)
3966                                                    ? FULL_DUPLEX :
3967                                                    HALF_DUPLEX;
3968                                         retval = e1000_set_spd_dplx(adapter,
3969                                                                     spddplx);
3970                                         if(retval) {
3971                                                 spin_unlock_irqrestore(
3972                                                         &adapter->stats_lock,
3973                                                         flags);
3974                                                 return retval;
3975                                         }
3976                                 }
3977                                 if(netif_running(adapter->netdev)) {
3978                                         e1000_down(adapter);
3979                                         e1000_up(adapter);
3980                                 } else
3981                                         e1000_reset(adapter);
3982                                 break;
3983                         case M88E1000_PHY_SPEC_CTRL:
3984                         case M88E1000_EXT_PHY_SPEC_CTRL:
3985                                 if(e1000_phy_reset(&adapter->hw)) {
3986                                         spin_unlock_irqrestore(
3987                                                 &adapter->stats_lock, flags);
3988                                         return -EIO;
3989                                 }
3990                                 break;
3991                         }
3992                 } else {
3993                         switch (data->reg_num) {
3994                         case PHY_CTRL:
3995                                 if(mii_reg & MII_CR_POWER_DOWN)
3996                                         break;
3997                                 if(netif_running(adapter->netdev)) {
3998                                         e1000_down(adapter);
3999                                         e1000_up(adapter);
4000                                 } else
4001                                         e1000_reset(adapter);
4002                                 break;
4003                         }
4004                 }
4005                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4006                 break;
4007         default:
4008                 return -EOPNOTSUPP;
4009         }
4010         return E1000_SUCCESS;
4011 }
4012
4013 void
4014 e1000_pci_set_mwi(struct e1000_hw *hw)
4015 {
4016         struct e1000_adapter *adapter = hw->back;
4017         int ret_val = pci_set_mwi(adapter->pdev);
4018
4019         if(ret_val)
4020                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4021 }
4022
4023 void
4024 e1000_pci_clear_mwi(struct e1000_hw *hw)
4025 {
4026         struct e1000_adapter *adapter = hw->back;
4027
4028         pci_clear_mwi(adapter->pdev);
4029 }
4030
4031 void
4032 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4033 {
4034         struct e1000_adapter *adapter = hw->back;
4035
4036         pci_read_config_word(adapter->pdev, reg, value);
4037 }
4038
4039 void
4040 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4041 {
4042         struct e1000_adapter *adapter = hw->back;
4043
4044         pci_write_config_word(adapter->pdev, reg, *value);
4045 }
4046
4047 uint32_t
4048 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4049 {
4050         return inl(port);
4051 }
4052
4053 void
4054 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4055 {
4056         outl(value, port);
4057 }
4058
4059 static void
4060 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4061 {
4062         struct e1000_adapter *adapter = netdev_priv(netdev);
4063         uint32_t ctrl, rctl;
4064
4065         e1000_irq_disable(adapter);
4066         adapter->vlgrp = grp;
4067
4068         if(grp) {
4069                 /* enable VLAN tag insert/strip */
4070                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4071                 ctrl |= E1000_CTRL_VME;
4072                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4073
4074                 /* enable VLAN receive filtering */
4075                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4076                 rctl |= E1000_RCTL_VFE;
4077                 rctl &= ~E1000_RCTL_CFIEN;
4078                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4079                 e1000_update_mng_vlan(adapter);
4080         } else {
4081                 /* disable VLAN tag insert/strip */
4082                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4083                 ctrl &= ~E1000_CTRL_VME;
4084                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4085
4086                 /* disable VLAN filtering */
4087                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4088                 rctl &= ~E1000_RCTL_VFE;
4089                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4090                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4091                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4092                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4093                 }
4094         }
4095
4096         e1000_irq_enable(adapter);
4097 }
4098
4099 static void
4100 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4101 {
4102         struct e1000_adapter *adapter = netdev_priv(netdev);
4103         uint32_t vfta, index;
4104         if((adapter->hw.mng_cookie.status &
4105                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4106                 (vid == adapter->mng_vlan_id))
4107                 return;
4108         /* add VID to filter table */
4109         index = (vid >> 5) & 0x7F;
4110         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4111         vfta |= (1 << (vid & 0x1F));
4112         e1000_write_vfta(&adapter->hw, index, vfta);
4113 }
4114
4115 static void
4116 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4117 {
4118         struct e1000_adapter *adapter = netdev_priv(netdev);
4119         uint32_t vfta, index;
4120
4121         e1000_irq_disable(adapter);
4122
4123         if(adapter->vlgrp)
4124                 adapter->vlgrp->vlan_devices[vid] = NULL;
4125
4126         e1000_irq_enable(adapter);
4127
4128         if((adapter->hw.mng_cookie.status &
4129                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4130                 (vid == adapter->mng_vlan_id))
4131                 return;
4132         /* remove VID from filter table */
4133         index = (vid >> 5) & 0x7F;
4134         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4135         vfta &= ~(1 << (vid & 0x1F));
4136         e1000_write_vfta(&adapter->hw, index, vfta);
4137 }
4138
4139 static void
4140 e1000_restore_vlan(struct e1000_adapter *adapter)
4141 {
4142         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4143
4144         if(adapter->vlgrp) {
4145                 uint16_t vid;
4146                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4147                         if(!adapter->vlgrp->vlan_devices[vid])
4148                                 continue;
4149                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4150                 }
4151         }
4152 }
4153
4154 int
4155 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4156 {
4157         adapter->hw.autoneg = 0;
4158
4159         /* Fiber NICs only allow 1000 gbps Full duplex */
4160         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4161                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4162                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4163                 return -EINVAL;
4164         }
4165
4166         switch(spddplx) {
4167         case SPEED_10 + DUPLEX_HALF:
4168                 adapter->hw.forced_speed_duplex = e1000_10_half;
4169                 break;
4170         case SPEED_10 + DUPLEX_FULL:
4171                 adapter->hw.forced_speed_duplex = e1000_10_full;
4172                 break;
4173         case SPEED_100 + DUPLEX_HALF:
4174                 adapter->hw.forced_speed_duplex = e1000_100_half;
4175                 break;
4176         case SPEED_100 + DUPLEX_FULL:
4177                 adapter->hw.forced_speed_duplex = e1000_100_full;
4178                 break;
4179         case SPEED_1000 + DUPLEX_FULL:
4180                 adapter->hw.autoneg = 1;
4181                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4182                 break;
4183         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4184         default:
4185                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4186                 return -EINVAL;
4187         }
4188         return 0;
4189 }
4190
4191 static int
4192 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4193 {
4194         struct net_device *netdev = pci_get_drvdata(pdev);
4195         struct e1000_adapter *adapter = netdev_priv(netdev);
4196         uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
4197         uint32_t wufc = adapter->wol;
4198
4199         netif_device_detach(netdev);
4200
4201         if(netif_running(netdev))
4202                 e1000_down(adapter);
4203
4204         status = E1000_READ_REG(&adapter->hw, STATUS);
4205         if(status & E1000_STATUS_LU)
4206                 wufc &= ~E1000_WUFC_LNKC;
4207
4208         if(wufc) {
4209                 e1000_setup_rctl(adapter);
4210                 e1000_set_multi(netdev);
4211
4212                 /* turn on all-multi mode if wake on multicast is enabled */
4213                 if(adapter->wol & E1000_WUFC_MC) {
4214                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4215                         rctl |= E1000_RCTL_MPE;
4216                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4217                 }
4218
4219                 if(adapter->hw.mac_type >= e1000_82540) {
4220                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4221                         /* advertise wake from D3Cold */
4222                         #define E1000_CTRL_ADVD3WUC 0x00100000
4223                         /* phy power management enable */
4224                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4225                         ctrl |= E1000_CTRL_ADVD3WUC |
4226                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4227                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4228                 }
4229
4230                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4231                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4232                         /* keep the laser running in D3 */
4233                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4234                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4235                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4236                 }
4237
4238                 /* Allow time for pending master requests to run */
4239                 e1000_disable_pciex_master(&adapter->hw);
4240
4241                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4242                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4243                 pci_enable_wake(pdev, 3, 1);
4244                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4245         } else {
4246                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4247                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4248                 pci_enable_wake(pdev, 3, 0);
4249                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4250         }
4251
4252         pci_save_state(pdev);
4253
4254         if(adapter->hw.mac_type >= e1000_82540 &&
4255            adapter->hw.media_type == e1000_media_type_copper) {
4256                 manc = E1000_READ_REG(&adapter->hw, MANC);
4257                 if(manc & E1000_MANC_SMBUS_EN) {
4258                         manc |= E1000_MANC_ARP_EN;
4259                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4260                         pci_enable_wake(pdev, 3, 1);
4261                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4262                 }
4263         }
4264
4265         switch(adapter->hw.mac_type) {
4266         case e1000_82571:
4267         case e1000_82572:
4268                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4269                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4270                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
4271                 break;
4272         case e1000_82573:
4273                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4274                 E1000_WRITE_REG(&adapter->hw, SWSM,
4275                                 swsm & ~E1000_SWSM_DRV_LOAD);
4276                 break;
4277         default:
4278                 break;
4279         }
4280
4281         pci_disable_device(pdev);
4282         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4283
4284         return 0;
4285 }
4286
4287 #ifdef CONFIG_PM
4288 static int
4289 e1000_resume(struct pci_dev *pdev)
4290 {
4291         struct net_device *netdev = pci_get_drvdata(pdev);
4292         struct e1000_adapter *adapter = netdev_priv(netdev);
4293         uint32_t manc, ret_val, swsm;
4294         uint32_t ctrl_ext;
4295
4296         pci_set_power_state(pdev, PCI_D0);
4297         pci_restore_state(pdev);
4298         ret_val = pci_enable_device(pdev);
4299         pci_set_master(pdev);
4300
4301         pci_enable_wake(pdev, PCI_D3hot, 0);
4302         pci_enable_wake(pdev, PCI_D3cold, 0);
4303
4304         e1000_reset(adapter);
4305         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4306
4307         if(netif_running(netdev))
4308                 e1000_up(adapter);
4309
4310         netif_device_attach(netdev);
4311
4312         if(adapter->hw.mac_type >= e1000_82540 &&
4313            adapter->hw.media_type == e1000_media_type_copper) {
4314                 manc = E1000_READ_REG(&adapter->hw, MANC);
4315                 manc &= ~(E1000_MANC_ARP_EN);
4316                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4317         }
4318
4319         switch(adapter->hw.mac_type) {
4320         case e1000_82571:
4321         case e1000_82572:
4322                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4323                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4324                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
4325                 break;
4326         case e1000_82573:
4327                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4328                 E1000_WRITE_REG(&adapter->hw, SWSM,
4329                                 swsm | E1000_SWSM_DRV_LOAD);
4330                 break;
4331         default:
4332                 break;
4333         }
4334
4335         return 0;
4336 }
4337 #endif
4338 #ifdef CONFIG_NET_POLL_CONTROLLER
4339 /*
4340  * Polling 'interrupt' - used by things like netconsole to send skbs
4341  * without having to re-enable interrupts. It's not called while
4342  * the interrupt routine is executing.
4343  */
4344 static void
4345 e1000_netpoll(struct net_device *netdev)
4346 {
4347         struct e1000_adapter *adapter = netdev_priv(netdev);
4348         disable_irq(adapter->pdev->irq);
4349         e1000_intr(adapter->pdev->irq, netdev, NULL);
4350         e1000_clean_tx_irq(adapter);
4351         enable_irq(adapter->pdev->irq);
4352 }
4353 #endif
4354
4355 /* e1000_main.c */