git.oblomov.eu Git - linux-2.6/blob - 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 "6.1.16-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(0x105E),
  84         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  88         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  89         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  94         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  95         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  96         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  97         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  98         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  99         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 100         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 101         /* required last entry */
 102         {0,}
 103 };
 104
 105 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 106
 107 int e1000_up(struct e1000_adapter *adapter);
 108 void e1000_down(struct e1000_adapter *adapter);
 109 void e1000_reset(struct e1000_adapter *adapter);
 110 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 111 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 112 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 113 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 114 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 115 int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 116                              struct e1000_tx_ring *txdr);
 117 int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 118                              struct e1000_rx_ring *rxdr);
 119 void e1000_free_tx_resources(struct e1000_adapter *adapter,
 120                              struct e1000_tx_ring *tx_ring);
 121 void e1000_free_rx_resources(struct e1000_adapter *adapter,
 122                              struct e1000_rx_ring *rx_ring);
 123 void e1000_update_stats(struct e1000_adapter *adapter);
 124
 125 /* Local Function Prototypes */
 126
 127 static int e1000_init_module(void);
 128 static void e1000_exit_module(void);
 129 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 130 static void __devexit e1000_remove(struct pci_dev *pdev);
 131 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 132 #ifdef CONFIG_E1000_MQ
 133 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
 134 #endif
 135 static int e1000_sw_init(struct e1000_adapter *adapter);
 136 static int e1000_open(struct net_device *netdev);
 137 static int e1000_close(struct net_device *netdev);
 138 static void e1000_configure_tx(struct e1000_adapter *adapter);
 139 static void e1000_configure_rx(struct e1000_adapter *adapter);
 140 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 141 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 142 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 143 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 144                                 struct e1000_tx_ring *tx_ring);
 145 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 146                                 struct e1000_rx_ring *rx_ring);
 147 static void e1000_set_multi(struct net_device *netdev);
 148 static void e1000_update_phy_info(unsigned long data);
 149 static void e1000_watchdog(unsigned long data);
 150 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 151 static void e1000_82547_tx_fifo_stall(unsigned long data);
 152 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 153 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 154 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 155 static int e1000_set_mac(struct net_device *netdev, void *p);
 156 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 157 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 158                                     struct e1000_tx_ring *tx_ring);
 159 #ifdef CONFIG_E1000_NAPI
 160 static int e1000_clean(struct net_device *poll_dev, int *budget);
 161 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 162                                     struct e1000_rx_ring *rx_ring,
 163                                     int *work_done, int work_to_do);
 164 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 165                                        struct e1000_rx_ring *rx_ring,
 166                                        int *work_done, int work_to_do);
 167 #else
 168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 169                                     struct e1000_rx_ring *rx_ring);
 170 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 171                                        struct e1000_rx_ring *rx_ring);
 172 #endif
 173 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 174                                    struct e1000_rx_ring *rx_ring);
 175 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 176                                       struct e1000_rx_ring *rx_ring);
 177 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 178 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 179                            int cmd);
 180 void e1000_set_ethtool_ops(struct net_device *netdev);
 181 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 182 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 183 static void e1000_tx_timeout(struct net_device *dev);
 184 static void e1000_tx_timeout_task(struct net_device *dev);
 185 static void e1000_smartspeed(struct e1000_adapter *adapter);
 186 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 187                                               struct sk_buff *skb);
 188
 189 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 190 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 191 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 192 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 193
 194 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 195 #ifdef CONFIG_PM
 196 static int e1000_resume(struct pci_dev *pdev);
 197 #endif
 198
 199 #ifdef CONFIG_NET_POLL_CONTROLLER
 200 /* for netdump / net console */
 201 static void e1000_netpoll (struct net_device *netdev);
 202 #endif
 203
 204 #ifdef CONFIG_E1000_MQ
 205 /* for multiple Rx queues */
 206 void e1000_rx_schedule(void *data);
 207 #endif
 208
 209 /* Exported from other modules */
 210
 211 extern void e1000_check_options(struct e1000_adapter *adapter);
 212
 213 static struct pci_driver e1000_driver = {
 214         .name     = e1000_driver_name,
 215         .id_table = e1000_pci_tbl,
 216         .probe    = e1000_probe,
 217         .remove   = __devexit_p(e1000_remove),
 218         /* Power Managment Hooks */
 219 #ifdef CONFIG_PM
 220         .suspend  = e1000_suspend,
 221         .resume   = e1000_resume
 222 #endif
 223 };
 224
 225 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 226 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 227 MODULE_LICENSE("GPL");
 228 MODULE_VERSION(DRV_VERSION);
 229
 230 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 231 module_param(debug, int, 0);
 232 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 233
 234 /**
 235  * e1000_init_module - Driver Registration Routine
 236  *
 237  * e1000_init_module is the first routine called when the driver is
 238  * loaded. All it does is register with the PCI subsystem.
 239  **/
 240
 241 static int __init
 242 e1000_init_module(void)
 243 {
 244         int ret;
 245         printk(KERN_INFO "%s - version %s\n",
 246                e1000_driver_string, e1000_driver_version);
 247
 248         printk(KERN_INFO "%s\n", e1000_copyright);
 249
 250         ret = pci_module_init(&e1000_driver);
 251
 252         return ret;
 253 }
 254
 255 module_init(e1000_init_module);
 256
 257 /**
 258  * e1000_exit_module - Driver Exit Cleanup Routine
 259  *
 260  * e1000_exit_module is called just before the driver is removed
 261  * from memory.
 262  **/
 263
 264 static void __exit
 265 e1000_exit_module(void)
 266 {
 267         pci_unregister_driver(&e1000_driver);
 268 }
 269
 270 module_exit(e1000_exit_module);
 271
 272 /**
 273  * e1000_irq_disable - Mask off interrupt generation on the NIC
 274  * @adapter: board private structure
 275  **/
 276
 277 static inline void
 278 e1000_irq_disable(struct e1000_adapter *adapter)
 279 {
 280         atomic_inc(&adapter->irq_sem);
 281         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 282         E1000_WRITE_FLUSH(&adapter->hw);
 283         synchronize_irq(adapter->pdev->irq);
 284 }
 285
 286 /**
 287  * e1000_irq_enable - Enable default interrupt generation settings
 288  * @adapter: board private structure
 289  **/
 290
 291 static inline void
 292 e1000_irq_enable(struct e1000_adapter *adapter)
 293 {
 294         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 295                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 296                 E1000_WRITE_FLUSH(&adapter->hw);
 297         }
 298 }
 299 void
 300 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 301 {
 302         struct net_device *netdev = adapter->netdev;
 303         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 304         uint16_t old_vid = adapter->mng_vlan_id;
 305         if(adapter->vlgrp) {
 306                 if(!adapter->vlgrp->vlan_devices[vid]) {
 307                         if(adapter->hw.mng_cookie.status &
 308                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 309                                 e1000_vlan_rx_add_vid(netdev, vid);
 310                                 adapter->mng_vlan_id = vid;
 311                         } else
 312                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 313
 314                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 315                                         (vid != old_vid) &&
 316                                         !adapter->vlgrp->vlan_devices[old_vid])
 317                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 318                 }
 319         }
 320 }
 321
 322 int
 323 e1000_up(struct e1000_adapter *adapter)
 324 {
 325         struct net_device *netdev = adapter->netdev;
 326         int i, err;
 327
 328         /* hardware has been reset, we need to reload some things */
 329
 330         /* Reset the PHY if it was previously powered down */
 331         if(adapter->hw.media_type == e1000_media_type_copper) {
 332                 uint16_t mii_reg;
 333                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 334                 if(mii_reg & MII_CR_POWER_DOWN)
 335                         e1000_phy_reset(&adapter->hw);
 336         }
 337
 338         e1000_set_multi(netdev);
 339
 340         e1000_restore_vlan(adapter);
 341
 342         e1000_configure_tx(adapter);
 343         e1000_setup_rctl(adapter);
 344         e1000_configure_rx(adapter);
 345         for (i = 0; i < adapter->num_queues; i++)
 346                 adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]);
 347
 348 #ifdef CONFIG_PCI_MSI
 349         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 350                 adapter->have_msi = TRUE;
 351                 if((err = pci_enable_msi(adapter->pdev))) {
 352                         DPRINTK(PROBE, ERR,
 353                          "Unable to allocate MSI interrupt Error: %d\n", err);
 354                         adapter->have_msi = FALSE;
 355                 }
 356         }
 357 #endif
 358         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 359                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 360                               netdev->name, netdev))) {
 361                 DPRINTK(PROBE, ERR,
 362                     "Unable to allocate interrupt Error: %d\n", err);
 363                 return err;
 364         }
 365
 366         mod_timer(&adapter->watchdog_timer, jiffies);
 367
 368 #ifdef CONFIG_E1000_NAPI
 369         netif_poll_enable(netdev);
 370 #endif
 371         e1000_irq_enable(adapter);
 372
 373         return 0;
 374 }
 375
 376 void
 377 e1000_down(struct e1000_adapter *adapter)
 378 {
 379         struct net_device *netdev = adapter->netdev;
 380
 381         e1000_irq_disable(adapter);
 382 #ifdef CONFIG_E1000_MQ
 383         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 384 #endif
 385         free_irq(adapter->pdev->irq, netdev);
 386 #ifdef CONFIG_PCI_MSI
 387         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 388            adapter->have_msi == TRUE)
 389                 pci_disable_msi(adapter->pdev);
 390 #endif
 391         del_timer_sync(&adapter->tx_fifo_stall_timer);
 392         del_timer_sync(&adapter->watchdog_timer);
 393         del_timer_sync(&adapter->phy_info_timer);
 394
 395 #ifdef CONFIG_E1000_NAPI
 396         netif_poll_disable(netdev);
 397 #endif
 398         adapter->link_speed = 0;
 399         adapter->link_duplex = 0;
 400         netif_carrier_off(netdev);
 401         netif_stop_queue(netdev);
 402
 403         e1000_reset(adapter);
 404         e1000_clean_all_tx_rings(adapter);
 405         e1000_clean_all_rx_rings(adapter);
 406
 407         /* If WoL is not enabled and management mode is not IAMT
 408          * Power down the PHY so no link is implied when interface is down */
 409         if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 410            adapter->hw.media_type == e1000_media_type_copper &&
 411            !e1000_check_mng_mode(&adapter->hw) &&
 412            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
 413                 uint16_t mii_reg;
 414                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 415                 mii_reg |= MII_CR_POWER_DOWN;
 416                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 417                 mdelay(1);
 418         }
 419 }
 420
 421 void
 422 e1000_reset(struct e1000_adapter *adapter)
 423 {
 424         struct net_device *netdev = adapter->netdev;
 425         uint32_t pba, manc;
 426         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 427         uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
 428
 429         /* Repartition Pba for greater than 9k mtu
 430          * To take effect CTRL.RST is required.
 431          */
 432
 433         switch (adapter->hw.mac_type) {
 434         case e1000_82547:
 435         case e1000_82547_rev_2:
 436                 pba = E1000_PBA_30K;
 437                 break;
 438         case e1000_82571:
 439         case e1000_82572:
 440                 pba = E1000_PBA_38K;
 441                 break;
 442         case e1000_82573:
 443                 pba = E1000_PBA_12K;
 444                 break;
 445         default:
 446                 pba = E1000_PBA_48K;
 447                 break;
 448         }
 449
 450         if((adapter->hw.mac_type != e1000_82573) &&
 451            (adapter->rx_buffer_len > E1000_RXBUFFER_8192)) {
 452                 pba -= 8; /* allocate more FIFO for Tx */
 453                 /* send an XOFF when there is enough space in the
 454                  * Rx FIFO to hold one extra full size Rx packet
 455                 */
 456                 fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
 457                                         ETHERNET_FCS_SIZE + 1;
 458                 fc_low_water_mark = fc_high_water_mark + 8;
 459         }
 460
 461
 462         if(adapter->hw.mac_type == e1000_82547) {
 463                 adapter->tx_fifo_head = 0;
 464                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 465                 adapter->tx_fifo_size =
 466                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 467                 atomic_set(&adapter->tx_fifo_stall, 0);
 468         }
 469
 470         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 471
 472         /* flow control settings */
 473         adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
 474                                     fc_high_water_mark;
 475         adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
 476                                    fc_low_water_mark;
 477         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 478         adapter->hw.fc_send_xon = 1;
 479         adapter->hw.fc = adapter->hw.original_fc;
 480
 481         /* Allow time for pending master requests to run */
 482         e1000_reset_hw(&adapter->hw);
 483         if(adapter->hw.mac_type >= e1000_82544)
 484                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 485         if(e1000_init_hw(&adapter->hw))
 486                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 487         e1000_update_mng_vlan(adapter);
 488         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 489         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 490
 491         e1000_reset_adaptive(&adapter->hw);
 492         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 493         if (adapter->en_mng_pt) {
 494                 manc = E1000_READ_REG(&adapter->hw, MANC);
 495                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 496                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 497         }
 498 }
 499
 500 /**
 501  * e1000_probe - Device Initialization Routine
 502  * @pdev: PCI device information struct
 503  * @ent: entry in e1000_pci_tbl
 504  *
 505  * Returns 0 on success, negative on failure
 506  *
 507  * e1000_probe initializes an adapter identified by a pci_dev structure.
 508  * The OS initialization, configuring of the adapter private structure,
 509  * and a hardware reset occur.
 510  **/
 511
 512 static int __devinit
 513 e1000_probe(struct pci_dev *pdev,
 514             const struct pci_device_id *ent)
 515 {
 516         struct net_device *netdev;
 517         struct e1000_adapter *adapter;
 518         unsigned long mmio_start, mmio_len;
 519         uint32_t ctrl_ext;
 520         uint32_t swsm;
 521
 522         static int cards_found = 0;
 523         int i, err, pci_using_dac;
 524         uint16_t eeprom_data;
 525         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 526         if((err = pci_enable_device(pdev)))
 527                 return err;
 528
 529         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 530                 pci_using_dac = 1;
 531         } else {
 532                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 533                         E1000_ERR("No usable DMA configuration, aborting\n");
 534                         return err;
 535                 }
 536                 pci_using_dac = 0;
 537         }
 538
 539         if((err = pci_request_regions(pdev, e1000_driver_name)))
 540                 return err;
 541
 542         pci_set_master(pdev);
 543
 544         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 545         if(!netdev) {
 546                 err = -ENOMEM;
 547                 goto err_alloc_etherdev;
 548         }
 549
 550         SET_MODULE_OWNER(netdev);
 551         SET_NETDEV_DEV(netdev, &pdev->dev);
 552
 553         pci_set_drvdata(pdev, netdev);
 554         adapter = netdev_priv(netdev);
 555         adapter->netdev = netdev;
 556         adapter->pdev = pdev;
 557         adapter->hw.back = adapter;
 558         adapter->msg_enable = (1 << debug) - 1;
 559
 560         mmio_start = pci_resource_start(pdev, BAR_0);
 561         mmio_len = pci_resource_len(pdev, BAR_0);
 562
 563         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 564         if(!adapter->hw.hw_addr) {
 565                 err = -EIO;
 566                 goto err_ioremap;
 567         }
 568
 569         for(i = BAR_1; i <= BAR_5; i++) {
 570                 if(pci_resource_len(pdev, i) == 0)
 571                         continue;
 572                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 573                         adapter->hw.io_base = pci_resource_start(pdev, i);
 574                         break;
 575                 }
 576         }
 577
 578         netdev->open = &e1000_open;
 579         netdev->stop = &e1000_close;
 580         netdev->hard_start_xmit = &e1000_xmit_frame;
 581         netdev->get_stats = &e1000_get_stats;
 582         netdev->set_multicast_list = &e1000_set_multi;
 583         netdev->set_mac_address = &e1000_set_mac;
 584         netdev->change_mtu = &e1000_change_mtu;
 585         netdev->do_ioctl = &e1000_ioctl;
 586         e1000_set_ethtool_ops(netdev);
 587         netdev->tx_timeout = &e1000_tx_timeout;
 588         netdev->watchdog_timeo = 5 * HZ;
 589 #ifdef CONFIG_E1000_NAPI
 590         netdev->poll = &e1000_clean;
 591         netdev->weight = 64;
 592 #endif
 593         netdev->vlan_rx_register = e1000_vlan_rx_register;
 594         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 595         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 596 #ifdef CONFIG_NET_POLL_CONTROLLER
 597         netdev->poll_controller = e1000_netpoll;
 598 #endif
 599         strcpy(netdev->name, pci_name(pdev));
 600
 601         netdev->mem_start = mmio_start;
 602         netdev->mem_end = mmio_start + mmio_len;
 603         netdev->base_addr = adapter->hw.io_base;
 604
 605         adapter->bd_number = cards_found;
 606
 607         /* setup the private structure */
 608
 609         if((err = e1000_sw_init(adapter)))
 610                 goto err_sw_init;
 611
 612         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 613                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 614
 615         if(adapter->hw.mac_type >= e1000_82543) {
 616                 netdev->features = NETIF_F_SG |
 617                                    NETIF_F_HW_CSUM |
 618                                    NETIF_F_HW_VLAN_TX |
 619                                    NETIF_F_HW_VLAN_RX |
 620                                    NETIF_F_HW_VLAN_FILTER;
 621         }
 622
 623 #ifdef NETIF_F_TSO
 624         if((adapter->hw.mac_type >= e1000_82544) &&
 625            (adapter->hw.mac_type != e1000_82547))
 626                 netdev->features |= NETIF_F_TSO;
 627
 628 #ifdef NETIF_F_TSO_IPV6
 629         if(adapter->hw.mac_type > e1000_82547_rev_2)
 630                 netdev->features |= NETIF_F_TSO_IPV6;
 631 #endif
 632 #endif
 633         if(pci_using_dac)
 634                 netdev->features |= NETIF_F_HIGHDMA;
 635
 636         /* hard_start_xmit is safe against parallel locking */
 637         netdev->features |= NETIF_F_LLTX;
 638
 639         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 640
 641         /* before reading the EEPROM, reset the controller to
 642          * put the device in a known good starting state */
 643
 644         e1000_reset_hw(&adapter->hw);
 645
 646         /* make sure the EEPROM is good */
 647
 648         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 649                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 650                 err = -EIO;
 651                 goto err_eeprom;
 652         }
 653
 654         /* copy the MAC address out of the EEPROM */
 655
 656         if(e1000_read_mac_addr(&adapter->hw))
 657                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 658         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 659         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 660
 661         if(!is_valid_ether_addr(netdev->perm_addr)) {
 662                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 663                 err = -EIO;
 664                 goto err_eeprom;
 665         }
 666
 667         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 668
 669         e1000_get_bus_info(&adapter->hw);
 670
 671         init_timer(&adapter->tx_fifo_stall_timer);
 672         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 673         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 674
 675         init_timer(&adapter->watchdog_timer);
 676         adapter->watchdog_timer.function = &e1000_watchdog;
 677         adapter->watchdog_timer.data = (unsigned long) adapter;
 678
 679         INIT_WORK(&adapter->watchdog_task,
 680                 (void (*)(void *))e1000_watchdog_task, adapter);
 681
 682         init_timer(&adapter->phy_info_timer);
 683         adapter->phy_info_timer.function = &e1000_update_phy_info;
 684         adapter->phy_info_timer.data = (unsigned long) adapter;
 685
 686         INIT_WORK(&adapter->tx_timeout_task,
 687                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 688
 689         /* we're going to reset, so assume we have no link for now */
 690
 691         netif_carrier_off(netdev);
 692         netif_stop_queue(netdev);
 693
 694         e1000_check_options(adapter);
 695
 696         /* Initial Wake on LAN setting
 697          * If APM wake is enabled in the EEPROM,
 698          * enable the ACPI Magic Packet filter
 699          */
 700
 701         switch(adapter->hw.mac_type) {
 702         case e1000_82542_rev2_0:
 703         case e1000_82542_rev2_1:
 704         case e1000_82543:
 705                 break;
 706         case e1000_82544:
 707                 e1000_read_eeprom(&adapter->hw,
 708                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 709                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 710                 break;
 711         case e1000_82546:
 712         case e1000_82546_rev_3:
 713                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 714                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 715                         e1000_read_eeprom(&adapter->hw,
 716                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 717                         break;
 718                 }
 719                 /* Fall Through */
 720         default:
 721                 e1000_read_eeprom(&adapter->hw,
 722                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 723                 break;
 724         }
 725         if(eeprom_data & eeprom_apme_mask)
 726                 adapter->wol |= E1000_WUFC_MAG;
 727
 728         /* reset the hardware with the new settings */
 729         e1000_reset(adapter);
 730
 731         /* Let firmware know the driver has taken over */
 732         switch(adapter->hw.mac_type) {
 733         case e1000_82571:
 734         case e1000_82572:
 735                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 736                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 737                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 738                 break;
 739         case e1000_82573:
 740                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 741                 E1000_WRITE_REG(&adapter->hw, SWSM,
 742                                 swsm | E1000_SWSM_DRV_LOAD);
 743                 break;
 744         default:
 745                 break;
 746         }
 747
 748         strcpy(netdev->name, "eth%d");
 749         if((err = register_netdev(netdev)))
 750                 goto err_register;
 751
 752         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 753
 754         cards_found++;
 755         return 0;
 756
 757 err_register:
 758 err_sw_init:
 759 err_eeprom:
 760         iounmap(adapter->hw.hw_addr);
 761 err_ioremap:
 762         free_netdev(netdev);
 763 err_alloc_etherdev:
 764         pci_release_regions(pdev);
 765         return err;
 766 }
 767
 768 /**
 769  * e1000_remove - Device Removal Routine
 770  * @pdev: PCI device information struct
 771  *
 772  * e1000_remove is called by the PCI subsystem to alert the driver
 773  * that it should release a PCI device.  The could be caused by a
 774  * Hot-Plug event, or because the driver is going to be removed from
 775  * memory.
 776  **/
 777
 778 static void __devexit
 779 e1000_remove(struct pci_dev *pdev)
 780 {
 781         struct net_device *netdev = pci_get_drvdata(pdev);
 782         struct e1000_adapter *adapter = netdev_priv(netdev);
 783         uint32_t ctrl_ext;
 784         uint32_t manc, swsm;
 785 #ifdef CONFIG_E1000_NAPI
 786         int i;
 787 #endif
 788
 789         flush_scheduled_work();
 790
 791         if(adapter->hw.mac_type >= e1000_82540 &&
 792            adapter->hw.media_type == e1000_media_type_copper) {
 793                 manc = E1000_READ_REG(&adapter->hw, MANC);
 794                 if(manc & E1000_MANC_SMBUS_EN) {
 795                         manc |= E1000_MANC_ARP_EN;
 796                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 797                 }
 798         }
 799
 800         switch(adapter->hw.mac_type) {
 801         case e1000_82571:
 802         case e1000_82572:
 803                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 804                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 805                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 806                 break;
 807         case e1000_82573:
 808                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 809                 E1000_WRITE_REG(&adapter->hw, SWSM,
 810                                 swsm & ~E1000_SWSM_DRV_LOAD);
 811                 break;
 812
 813         default:
 814                 break;
 815         }
 816
 817         unregister_netdev(netdev);
 818 #ifdef CONFIG_E1000_NAPI
 819         for (i = 0; i < adapter->num_queues; i++)
 820                 __dev_put(&adapter->polling_netdev[i]);
 821 #endif
 822
 823         if(!e1000_check_phy_reset_block(&adapter->hw))
 824                 e1000_phy_hw_reset(&adapter->hw);
 825
 826         kfree(adapter->tx_ring);
 827         kfree(adapter->rx_ring);
 828 #ifdef CONFIG_E1000_NAPI
 829         kfree(adapter->polling_netdev);
 830 #endif
 831
 832         iounmap(adapter->hw.hw_addr);
 833         pci_release_regions(pdev);
 834
 835 #ifdef CONFIG_E1000_MQ
 836         free_percpu(adapter->cpu_netdev);
 837         free_percpu(adapter->cpu_tx_ring);
 838 #endif
 839         free_netdev(netdev);
 840
 841         pci_disable_device(pdev);
 842 }
 843
 844 /**
 845  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 846  * @adapter: board private structure to initialize
 847  *
 848  * e1000_sw_init initializes the Adapter private data structure.
 849  * Fields are initialized based on PCI device information and
 850  * OS network device settings (MTU size).
 851  **/
 852
 853 static int __devinit
 854 e1000_sw_init(struct e1000_adapter *adapter)
 855 {
 856         struct e1000_hw *hw = &adapter->hw;
 857         struct net_device *netdev = adapter->netdev;
 858         struct pci_dev *pdev = adapter->pdev;
 859 #ifdef CONFIG_E1000_NAPI
 860         int i;
 861 #endif
 862
 863         /* PCI config space info */
 864
 865         hw->vendor_id = pdev->vendor;
 866         hw->device_id = pdev->device;
 867         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 868         hw->subsystem_id = pdev->subsystem_device;
 869
 870         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 871
 872         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 873
 874         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 875         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 876         hw->max_frame_size = netdev->mtu +
 877                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 878         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 879
 880         /* identify the MAC */
 881
 882         if(e1000_set_mac_type(hw)) {
 883                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 884                 return -EIO;
 885         }
 886
 887         /* initialize eeprom parameters */
 888
 889         if(e1000_init_eeprom_params(hw)) {
 890                 E1000_ERR("EEPROM initialization failed\n");
 891                 return -EIO;
 892         }
 893
 894         switch(hw->mac_type) {
 895         default:
 896                 break;
 897         case e1000_82541:
 898         case e1000_82547:
 899         case e1000_82541_rev_2:
 900         case e1000_82547_rev_2:
 901                 hw->phy_init_script = 1;
 902                 break;
 903         }
 904
 905         e1000_set_media_type(hw);
 906
 907         hw->wait_autoneg_complete = FALSE;
 908         hw->tbi_compatibility_en = TRUE;
 909         hw->adaptive_ifs = TRUE;
 910
 911         /* Copper options */
 912
 913         if(hw->media_type == e1000_media_type_copper) {
 914                 hw->mdix = AUTO_ALL_MODES;
 915                 hw->disable_polarity_correction = FALSE;
 916                 hw->master_slave = E1000_MASTER_SLAVE;
 917         }
 918
 919 #ifdef CONFIG_E1000_MQ
 920         /* Number of supported queues */
 921         switch (hw->mac_type) {
 922         case e1000_82571:
 923         case e1000_82572:
 924                 adapter->num_queues = 2;
 925                 break;
 926         default:
 927                 adapter->num_queues = 1;
 928                 break;
 929         }
 930         adapter->num_queues = min(adapter->num_queues, num_online_cpus());
 931 #else
 932         adapter->num_queues = 1;
 933 #endif
 934
 935         if (e1000_alloc_queues(adapter)) {
 936                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
 937                 return -ENOMEM;
 938         }
 939
 940 #ifdef CONFIG_E1000_NAPI
 941         for (i = 0; i < adapter->num_queues; i++) {
 942                 adapter->polling_netdev[i].priv = adapter;
 943                 adapter->polling_netdev[i].poll = &e1000_clean;
 944                 adapter->polling_netdev[i].weight = 64;
 945                 dev_hold(&adapter->polling_netdev[i]);
 946                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
 947         }
 948 #endif
 949
 950 #ifdef CONFIG_E1000_MQ
 951         e1000_setup_queue_mapping(adapter);
 952 #endif
 953
 954         atomic_set(&adapter->irq_sem, 1);
 955         spin_lock_init(&adapter->stats_lock);
 956
 957         return 0;
 958 }
 959
 960 /**
 961  * e1000_alloc_queues - Allocate memory for all rings
 962  * @adapter: board private structure to initialize
 963  *
 964  * We allocate one ring per queue at run-time since we don't know the
 965  * number of queues at compile-time.  The polling_netdev array is
 966  * intended for Multiqueue, but should work fine with a single queue.
 967  **/
 968
 969 static int __devinit
 970 e1000_alloc_queues(struct e1000_adapter *adapter)
 971 {
 972         int size;
 973
 974         size = sizeof(struct e1000_tx_ring) * adapter->num_queues;
 975         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
 976         if (!adapter->tx_ring)
 977                 return -ENOMEM;
 978         memset(adapter->tx_ring, 0, size);
 979
 980         size = sizeof(struct e1000_rx_ring) * adapter->num_queues;
 981         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
 982         if (!adapter->rx_ring) {
 983                 kfree(adapter->tx_ring);
 984                 return -ENOMEM;
 985         }
 986         memset(adapter->rx_ring, 0, size);
 987
 988 #ifdef CONFIG_E1000_NAPI
 989         size = sizeof(struct net_device) * adapter->num_queues;
 990         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
 991         if (!adapter->polling_netdev) {
 992                 kfree(adapter->tx_ring);
 993                 kfree(adapter->rx_ring);
 994                 return -ENOMEM;
 995         }
 996         memset(adapter->polling_netdev, 0, size);
 997 #endif
 998
 999         return E1000_SUCCESS;
1000 }
1001
1002 #ifdef CONFIG_E1000_MQ
1003 static void __devinit
1004 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1005 {
1006         int i, cpu;
1007
1008         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1009         adapter->rx_sched_call_data.info = adapter->netdev;
1010         cpus_clear(adapter->rx_sched_call_data.cpumask);
1011
1012         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1013         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1014
1015         lock_cpu_hotplug();
1016         i = 0;
1017         for_each_online_cpu(cpu) {
1018                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_queues];
1019                 /* This is incomplete because we'd like to assign separate
1020                  * physical cpus to these netdev polling structures and
1021                  * avoid saturating a subset of cpus.
1022                  */
1023                 if (i < adapter->num_queues) {
1024                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1025                         adapter->cpu_for_queue[i] = cpu;
1026                 } else
1027                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1028
1029                 i++;
1030         }
1031         unlock_cpu_hotplug();
1032 }
1033 #endif
1034
1035 /**
1036  * e1000_open - Called when a network interface is made active
1037  * @netdev: network interface device structure
1038  *
1039  * Returns 0 on success, negative value on failure
1040  *
1041  * The open entry point is called when a network interface is made
1042  * active by the system (IFF_UP).  At this point all resources needed
1043  * for transmit and receive operations are allocated, the interrupt
1044  * handler is registered with the OS, the watchdog timer is started,
1045  * and the stack is notified that the interface is ready.
1046  **/
1047
1048 static int
1049 e1000_open(struct net_device *netdev)
1050 {
1051         struct e1000_adapter *adapter = netdev_priv(netdev);
1052         int err;
1053
1054         /* allocate transmit descriptors */
1055
1056         if ((err = e1000_setup_all_tx_resources(adapter)))
1057                 goto err_setup_tx;
1058
1059         /* allocate receive descriptors */
1060
1061         if ((err = e1000_setup_all_rx_resources(adapter)))
1062                 goto err_setup_rx;
1063
1064         if((err = e1000_up(adapter)))
1065                 goto err_up;
1066         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1067         if((adapter->hw.mng_cookie.status &
1068                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1069                 e1000_update_mng_vlan(adapter);
1070         }
1071
1072         return E1000_SUCCESS;
1073
1074 err_up:
1075         e1000_free_all_rx_resources(adapter);
1076 err_setup_rx:
1077         e1000_free_all_tx_resources(adapter);
1078 err_setup_tx:
1079         e1000_reset(adapter);
1080
1081         return err;
1082 }
1083
1084 /**
1085  * e1000_close - Disables a network interface
1086  * @netdev: network interface device structure
1087  *
1088  * Returns 0, this is not allowed to fail
1089  *
1090  * The close entry point is called when an interface is de-activated
1091  * by the OS.  The hardware is still under the drivers control, but
1092  * needs to be disabled.  A global MAC reset is issued to stop the
1093  * hardware, and all transmit and receive resources are freed.
1094  **/
1095
1096 static int
1097 e1000_close(struct net_device *netdev)
1098 {
1099         struct e1000_adapter *adapter = netdev_priv(netdev);
1100
1101         e1000_down(adapter);
1102
1103         e1000_free_all_tx_resources(adapter);
1104         e1000_free_all_rx_resources(adapter);
1105
1106         if((adapter->hw.mng_cookie.status &
1107                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1108                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1109         }
1110         return 0;
1111 }
1112
1113 /**
1114  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1115  * @adapter: address of board private structure
1116  * @start: address of beginning of memory
1117  * @len: length of memory
1118  **/
1119 static inline boolean_t
1120 e1000_check_64k_bound(struct e1000_adapter *adapter,
1121                       void *start, unsigned long len)
1122 {
1123         unsigned long begin = (unsigned long) start;
1124         unsigned long end = begin + len;
1125
1126         /* First rev 82545 and 82546 need to not allow any memory
1127          * write location to cross 64k boundary due to errata 23 */
1128         if (adapter->hw.mac_type == e1000_82545 ||
1129             adapter->hw.mac_type == e1000_82546) {
1130                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1131         }
1132
1133         return TRUE;
1134 }
1135
1136 /**
1137  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1138  * @adapter: board private structure
1139  * @txdr:    tx descriptor ring (for a specific queue) to setup
1140  *
1141  * Return 0 on success, negative on failure
1142  **/
1143
1144 int
1145 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1146                          struct e1000_tx_ring *txdr)
1147 {
1148         struct pci_dev *pdev = adapter->pdev;
1149         int size;
1150
1151         size = sizeof(struct e1000_buffer) * txdr->count;
1152         txdr->buffer_info = vmalloc(size);
1153         if(!txdr->buffer_info) {
1154                 DPRINTK(PROBE, ERR,
1155                 "Unable to allocate memory for the transmit descriptor ring\n");
1156                 return -ENOMEM;
1157         }
1158         memset(txdr->buffer_info, 0, size);
1159         memset(&txdr->previous_buffer_info, 0, sizeof(struct e1000_buffer));
1160
1161         /* round up to nearest 4K */
1162
1163         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1164         E1000_ROUNDUP(txdr->size, 4096);
1165
1166         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1167         if(!txdr->desc) {
1168 setup_tx_desc_die:
1169                 vfree(txdr->buffer_info);
1170                 DPRINTK(PROBE, ERR,
1171                 "Unable to allocate memory for the transmit descriptor ring\n");
1172                 return -ENOMEM;
1173         }
1174
1175         /* Fix for errata 23, can't cross 64kB boundary */
1176         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1177                 void *olddesc = txdr->desc;
1178                 dma_addr_t olddma = txdr->dma;
1179                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1180                                      "at %p\n", txdr->size, txdr->desc);
1181                 /* Try again, without freeing the previous */
1182                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1183                 if(!txdr->desc) {
1184                 /* Failed allocation, critical failure */
1185                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1186                         goto setup_tx_desc_die;
1187                 }
1188
1189                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1190                         /* give up */
1191                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1192                                             txdr->dma);
1193                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1194                         DPRINTK(PROBE, ERR,
1195                                 "Unable to allocate aligned memory "
1196                                 "for the transmit descriptor ring\n");
1197                         vfree(txdr->buffer_info);
1198                         return -ENOMEM;
1199                 } else {
1200                         /* Free old allocation, new allocation was successful */
1201                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1202                 }
1203         }
1204         memset(txdr->desc, 0, txdr->size);
1205
1206         txdr->next_to_use = 0;
1207         txdr->next_to_clean = 0;
1208         spin_lock_init(&txdr->tx_lock);
1209
1210         return 0;
1211 }
1212
1213 /**
1214  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1215  *                                (Descriptors) for all queues
1216  * @adapter: board private structure
1217  *
1218  * If this function returns with an error, then it's possible one or
1219  * more of the rings is populated (while the rest are not).  It is the
1220  * callers duty to clean those orphaned rings.
1221  *
1222  * Return 0 on success, negative on failure
1223  **/
1224
1225 int
1226 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1227 {
1228         int i, err = 0;
1229
1230         for (i = 0; i < adapter->num_queues; i++) {
1231                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1232                 if (err) {
1233                         DPRINTK(PROBE, ERR,
1234                                 "Allocation for Tx Queue %u failed\n", i);
1235                         break;
1236                 }
1237         }
1238
1239         return err;
1240 }
1241
1242 /**
1243  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1244  * @adapter: board private structure
1245  *
1246  * Configure the Tx unit of the MAC after a reset.
1247  **/
1248
1249 static void
1250 e1000_configure_tx(struct e1000_adapter *adapter)
1251 {
1252         uint64_t tdba;
1253         struct e1000_hw *hw = &adapter->hw;
1254         uint32_t tdlen, tctl, tipg, tarc;
1255
1256         /* Setup the HW Tx Head and Tail descriptor pointers */
1257
1258         switch (adapter->num_queues) {
1259         case 2:
1260                 tdba = adapter->tx_ring[1].dma;
1261                 tdlen = adapter->tx_ring[1].count *
1262                         sizeof(struct e1000_tx_desc);
1263                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1264                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1265                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1266                 E1000_WRITE_REG(hw, TDH1, 0);
1267                 E1000_WRITE_REG(hw, TDT1, 0);
1268                 adapter->tx_ring[1].tdh = E1000_TDH1;
1269                 adapter->tx_ring[1].tdt = E1000_TDT1;
1270                 /* Fall Through */
1271         case 1:
1272         default:
1273                 tdba = adapter->tx_ring[0].dma;
1274                 tdlen = adapter->tx_ring[0].count *
1275                         sizeof(struct e1000_tx_desc);
1276                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1277                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1278                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1279                 E1000_WRITE_REG(hw, TDH, 0);
1280                 E1000_WRITE_REG(hw, TDT, 0);
1281                 adapter->tx_ring[0].tdh = E1000_TDH;
1282                 adapter->tx_ring[0].tdt = E1000_TDT;
1283                 break;
1284         }
1285
1286         /* Set the default values for the Tx Inter Packet Gap timer */
1287
1288         switch (hw->mac_type) {
1289         case e1000_82542_rev2_0:
1290         case e1000_82542_rev2_1:
1291                 tipg = DEFAULT_82542_TIPG_IPGT;
1292                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1293                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1294                 break;
1295         default:
1296                 if (hw->media_type == e1000_media_type_fiber ||
1297                     hw->media_type == e1000_media_type_internal_serdes)
1298                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1299                 else
1300                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1301                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1302                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1303         }
1304         E1000_WRITE_REG(hw, TIPG, tipg);
1305
1306         /* Set the Tx Interrupt Delay register */
1307
1308         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1309         if (hw->mac_type >= e1000_82540)
1310                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1311
1312         /* Program the Transmit Control Register */
1313
1314         tctl = E1000_READ_REG(hw, TCTL);
1315
1316         tctl &= ~E1000_TCTL_CT;
1317         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1318                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1319
1320         E1000_WRITE_REG(hw, TCTL, tctl);
1321
1322         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1323                 tarc = E1000_READ_REG(hw, TARC0);
1324                 tarc |= ((1 << 25) | (1 << 21));
1325                 E1000_WRITE_REG(hw, TARC0, tarc);
1326                 tarc = E1000_READ_REG(hw, TARC1);
1327                 tarc |= (1 << 25);
1328                 if (tctl & E1000_TCTL_MULR)
1329                         tarc &= ~(1 << 28);
1330                 else
1331                         tarc |= (1 << 28);
1332                 E1000_WRITE_REG(hw, TARC1, tarc);
1333         }
1334
1335         e1000_config_collision_dist(hw);
1336
1337         /* Setup Transmit Descriptor Settings for eop descriptor */
1338         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1339                 E1000_TXD_CMD_IFCS;
1340
1341         if (hw->mac_type < e1000_82543)
1342                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1343         else
1344                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1345
1346         /* Cache if we're 82544 running in PCI-X because we'll
1347          * need this to apply a workaround later in the send path. */
1348         if (hw->mac_type == e1000_82544 &&
1349             hw->bus_type == e1000_bus_type_pcix)
1350                 adapter->pcix_82544 = 1;
1351 }
1352
1353 /**
1354  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1355  * @adapter: board private structure
1356  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1357  *
1358  * Returns 0 on success, negative on failure
1359  **/
1360
1361 int
1362 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1363                          struct e1000_rx_ring *rxdr)
1364 {
1365         struct pci_dev *pdev = adapter->pdev;
1366         int size, desc_len;
1367
1368         size = sizeof(struct e1000_buffer) * rxdr->count;
1369         rxdr->buffer_info = vmalloc(size);
1370         if (!rxdr->buffer_info) {
1371                 DPRINTK(PROBE, ERR,
1372                 "Unable to allocate memory for the receive descriptor ring\n");
1373                 return -ENOMEM;
1374         }
1375         memset(rxdr->buffer_info, 0, size);
1376
1377         size = sizeof(struct e1000_ps_page) * rxdr->count;
1378         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1379         if(!rxdr->ps_page) {
1380                 vfree(rxdr->buffer_info);
1381                 DPRINTK(PROBE, ERR,
1382                 "Unable to allocate memory for the receive descriptor ring\n");
1383                 return -ENOMEM;
1384         }
1385         memset(rxdr->ps_page, 0, size);
1386
1387         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1388         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1389         if(!rxdr->ps_page_dma) {
1390                 vfree(rxdr->buffer_info);
1391                 kfree(rxdr->ps_page);
1392                 DPRINTK(PROBE, ERR,
1393                 "Unable to allocate memory for the receive descriptor ring\n");
1394                 return -ENOMEM;
1395         }
1396         memset(rxdr->ps_page_dma, 0, size);
1397
1398         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1399                 desc_len = sizeof(struct e1000_rx_desc);
1400         else
1401                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1402
1403         /* Round up to nearest 4K */
1404
1405         rxdr->size = rxdr->count * desc_len;
1406         E1000_ROUNDUP(rxdr->size, 4096);
1407
1408         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1409
1410         if (!rxdr->desc) {
1411                 DPRINTK(PROBE, ERR,
1412                 "Unable to allocate memory for the receive descriptor ring\n");
1413 setup_rx_desc_die:
1414                 vfree(rxdr->buffer_info);
1415                 kfree(rxdr->ps_page);
1416                 kfree(rxdr->ps_page_dma);
1417                 return -ENOMEM;
1418         }
1419
1420         /* Fix for errata 23, can't cross 64kB boundary */
1421         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1422                 void *olddesc = rxdr->desc;
1423                 dma_addr_t olddma = rxdr->dma;
1424                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1425                                      "at %p\n", rxdr->size, rxdr->desc);
1426                 /* Try again, without freeing the previous */
1427                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1428                 /* Failed allocation, critical failure */
1429                 if (!rxdr->desc) {
1430                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1431                         DPRINTK(PROBE, ERR,
1432                                 "Unable to allocate memory "
1433                                 "for the receive descriptor ring\n");
1434                         goto setup_rx_desc_die;
1435                 }
1436
1437                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1438                         /* give up */
1439                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1440                                             rxdr->dma);
1441                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1442                         DPRINTK(PROBE, ERR,
1443                                 "Unable to allocate aligned memory "
1444                                 "for the receive descriptor ring\n");
1445                         goto setup_rx_desc_die;
1446                 } else {
1447                         /* Free old allocation, new allocation was successful */
1448                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1449                 }
1450         }
1451         memset(rxdr->desc, 0, rxdr->size);
1452
1453         rxdr->next_to_clean = 0;
1454         rxdr->next_to_use = 0;
1455
1456         return 0;
1457 }
1458
1459 /**
1460  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1461  *                                (Descriptors) for all queues
1462  * @adapter: board private structure
1463  *
1464  * If this function returns with an error, then it's possible one or
1465  * more of the rings is populated (while the rest are not).  It is the
1466  * callers duty to clean those orphaned rings.
1467  *
1468  * Return 0 on success, negative on failure
1469  **/
1470
1471 int
1472 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1473 {
1474         int i, err = 0;
1475
1476         for (i = 0; i < adapter->num_queues; i++) {
1477                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1478                 if (err) {
1479                         DPRINTK(PROBE, ERR,
1480                                 "Allocation for Rx Queue %u failed\n", i);
1481                         break;
1482                 }
1483         }
1484
1485         return err;
1486 }
1487
1488 /**
1489  * e1000_setup_rctl - configure the receive control registers
1490  * @adapter: Board private structure
1491  **/
1492 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1493                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1494 static void
1495 e1000_setup_rctl(struct e1000_adapter *adapter)
1496 {
1497         uint32_t rctl, rfctl;
1498         uint32_t psrctl = 0;
1499 #ifdef CONFIG_E1000_PACKET_SPLIT
1500         uint32_t pages = 0;
1501 #endif
1502
1503         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1504
1505         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1506
1507         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1508                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1509                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1510
1511         if(adapter->hw.tbi_compatibility_on == 1)
1512                 rctl |= E1000_RCTL_SBP;
1513         else
1514                 rctl &= ~E1000_RCTL_SBP;
1515
1516         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1517                 rctl &= ~E1000_RCTL_LPE;
1518         else
1519                 rctl |= E1000_RCTL_LPE;
1520
1521         /* Setup buffer sizes */
1522         if(adapter->hw.mac_type >= e1000_82571) {
1523                 /* We can now specify buffers in 1K increments.
1524                  * BSIZE and BSEX are ignored in this case. */
1525                 rctl |= adapter->rx_buffer_len << 0x11;
1526         } else {
1527                 rctl &= ~E1000_RCTL_SZ_4096;
1528                 rctl |= E1000_RCTL_BSEX;
1529                 switch (adapter->rx_buffer_len) {
1530                 case E1000_RXBUFFER_2048:
1531                 default:
1532                         rctl |= E1000_RCTL_SZ_2048;
1533                         rctl &= ~E1000_RCTL_BSEX;
1534                         break;
1535                 case E1000_RXBUFFER_4096:
1536                         rctl |= E1000_RCTL_SZ_4096;
1537                         break;
1538                 case E1000_RXBUFFER_8192:
1539                         rctl |= E1000_RCTL_SZ_8192;
1540                         break;
1541                 case E1000_RXBUFFER_16384:
1542                         rctl |= E1000_RCTL_SZ_16384;
1543                         break;
1544                 }
1545         }
1546
1547 #ifdef CONFIG_E1000_PACKET_SPLIT
1548         /* 82571 and greater support packet-split where the protocol
1549          * header is placed in skb->data and the packet data is
1550          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1551          * In the case of a non-split, skb->data is linearly filled,
1552          * followed by the page buffers.  Therefore, skb->data is
1553          * sized to hold the largest protocol header.
1554          */
1555         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1556         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1557             PAGE_SIZE <= 16384)
1558                 adapter->rx_ps_pages = pages;
1559         else
1560                 adapter->rx_ps_pages = 0;
1561 #endif
1562         if (adapter->rx_ps_pages) {
1563                 /* Configure extra packet-split registers */
1564                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1565                 rfctl |= E1000_RFCTL_EXTEN;
1566                 /* disable IPv6 packet split support */
1567                 rfctl |= E1000_RFCTL_IPV6_DIS;
1568                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1569
1570                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1571
1572                 psrctl |= adapter->rx_ps_bsize0 >>
1573                         E1000_PSRCTL_BSIZE0_SHIFT;
1574
1575                 switch (adapter->rx_ps_pages) {
1576                 case 3:
1577                         psrctl |= PAGE_SIZE <<
1578                                 E1000_PSRCTL_BSIZE3_SHIFT;
1579                 case 2:
1580                         psrctl |= PAGE_SIZE <<
1581                                 E1000_PSRCTL_BSIZE2_SHIFT;
1582                 case 1:
1583                         psrctl |= PAGE_SIZE >>
1584                                 E1000_PSRCTL_BSIZE1_SHIFT;
1585                         break;
1586                 }
1587
1588                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1589         }
1590
1591         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1592 }
1593
1594 /**
1595  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1596  * @adapter: board private structure
1597  *
1598  * Configure the Rx unit of the MAC after a reset.
1599  **/
1600
1601 static void
1602 e1000_configure_rx(struct e1000_adapter *adapter)
1603 {
1604         uint64_t rdba;
1605         struct e1000_hw *hw = &adapter->hw;
1606         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1607 #ifdef CONFIG_E1000_MQ
1608         uint32_t reta, mrqc;
1609         int i;
1610 #endif
1611
1612         if (adapter->rx_ps_pages) {
1613                 rdlen = adapter->rx_ring[0].count *
1614                         sizeof(union e1000_rx_desc_packet_split);
1615                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1616                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1617         } else {
1618                 rdlen = adapter->rx_ring[0].count *
1619                         sizeof(struct e1000_rx_desc);
1620                 adapter->clean_rx = e1000_clean_rx_irq;
1621                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1622         }
1623
1624         /* disable receives while setting up the descriptors */
1625         rctl = E1000_READ_REG(hw, RCTL);
1626         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1627
1628         /* set the Receive Delay Timer Register */
1629         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1630
1631         if (hw->mac_type >= e1000_82540) {
1632                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1633                 if(adapter->itr > 1)
1634                         E1000_WRITE_REG(hw, ITR,
1635                                 1000000000 / (adapter->itr * 256));
1636         }
1637
1638         if (hw->mac_type >= e1000_82571) {
1639                 /* Reset delay timers after every interrupt */
1640                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1641                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1642                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1643                 E1000_WRITE_FLUSH(hw);
1644         }
1645
1646         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1647          * the Base and Length of the Rx Descriptor Ring */
1648         switch (adapter->num_queues) {
1649 #ifdef CONFIG_E1000_MQ
1650         case 2:
1651                 rdba = adapter->rx_ring[1].dma;
1652                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1653                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1654                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1655                 E1000_WRITE_REG(hw, RDH1, 0);
1656                 E1000_WRITE_REG(hw, RDT1, 0);
1657                 adapter->rx_ring[1].rdh = E1000_RDH1;
1658                 adapter->rx_ring[1].rdt = E1000_RDT1;
1659                 /* Fall Through */
1660 #endif
1661         case 1:
1662         default:
1663                 rdba = adapter->rx_ring[0].dma;
1664                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1665                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1666                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1667                 E1000_WRITE_REG(hw, RDH, 0);
1668                 E1000_WRITE_REG(hw, RDT, 0);
1669                 adapter->rx_ring[0].rdh = E1000_RDH;
1670                 adapter->rx_ring[0].rdt = E1000_RDT;
1671                 break;
1672         }
1673
1674 #ifdef CONFIG_E1000_MQ
1675         if (adapter->num_queues > 1) {
1676                 uint32_t random[10];
1677
1678                 get_random_bytes(&random[0], 40);
1679
1680                 if (hw->mac_type <= e1000_82572) {
1681                         E1000_WRITE_REG(hw, RSSIR, 0);
1682                         E1000_WRITE_REG(hw, RSSIM, 0);
1683                 }
1684
1685                 switch (adapter->num_queues) {
1686                 case 2:
1687                 default:
1688                         reta = 0x00800080;
1689                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1690                         break;
1691                 }
1692
1693                 /* Fill out redirection table */
1694                 for (i = 0; i < 32; i++)
1695                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1696                 /* Fill out hash function seeds */
1697                 for (i = 0; i < 10; i++)
1698                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1699
1700                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1701                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1702                 E1000_WRITE_REG(hw, MRQC, mrqc);
1703         }
1704
1705         /* Multiqueue and packet checksumming are mutually exclusive. */
1706         if (hw->mac_type >= e1000_82571) {
1707                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1708                 rxcsum |= E1000_RXCSUM_PCSD;
1709                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1710         }
1711
1712 #else
1713
1714         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1715         if (hw->mac_type >= e1000_82543) {
1716                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1717                 if(adapter->rx_csum == TRUE) {
1718                         rxcsum |= E1000_RXCSUM_TUOFL;
1719
1720                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1721                          * Must be used in conjunction with packet-split. */
1722                         if ((hw->mac_type >= e1000_82571) &&
1723                            (adapter->rx_ps_pages)) {
1724                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1725                         }
1726                 } else {
1727                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1728                         /* don't need to clear IPPCSE as it defaults to 0 */
1729                 }
1730                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1731         }
1732 #endif /* CONFIG_E1000_MQ */
1733
1734         if (hw->mac_type == e1000_82573)
1735                 E1000_WRITE_REG(hw, ERT, 0x0100);
1736
1737         /* Enable Receives */
1738         E1000_WRITE_REG(hw, RCTL, rctl);
1739 }
1740
1741 /**
1742  * e1000_free_tx_resources - Free Tx Resources per Queue
1743  * @adapter: board private structure
1744  * @tx_ring: Tx descriptor ring for a specific queue
1745  *
1746  * Free all transmit software resources
1747  **/
1748
1749 void
1750 e1000_free_tx_resources(struct e1000_adapter *adapter,
1751                         struct e1000_tx_ring *tx_ring)
1752 {
1753         struct pci_dev *pdev = adapter->pdev;
1754
1755         e1000_clean_tx_ring(adapter, tx_ring);
1756
1757         vfree(tx_ring->buffer_info);
1758         tx_ring->buffer_info = NULL;
1759
1760         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1761
1762         tx_ring->desc = NULL;
1763 }
1764
1765 /**
1766  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1767  * @adapter: board private structure
1768  *
1769  * Free all transmit software resources
1770  **/
1771
1772 void
1773 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1774 {
1775         int i;
1776
1777         for (i = 0; i < adapter->num_queues; i++)
1778                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1779 }
1780
1781 static inline void
1782 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1783                         struct e1000_buffer *buffer_info)
1784 {
1785         if(buffer_info->dma) {
1786                 pci_unmap_page(adapter->pdev,
1787                                 buffer_info->dma,
1788                                 buffer_info->length,
1789                                 PCI_DMA_TODEVICE);
1790                 buffer_info->dma = 0;
1791         }
1792         if(buffer_info->skb) {
1793                 dev_kfree_skb_any(buffer_info->skb);
1794                 buffer_info->skb = NULL;
1795         }
1796 }
1797
1798 /**
1799  * e1000_clean_tx_ring - Free Tx Buffers
1800  * @adapter: board private structure
1801  * @tx_ring: ring to be cleaned
1802  **/
1803
1804 static void
1805 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1806                     struct e1000_tx_ring *tx_ring)
1807 {
1808         struct e1000_buffer *buffer_info;
1809         unsigned long size;
1810         unsigned int i;
1811
1812         /* Free all the Tx ring sk_buffs */
1813
1814         if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
1815                 e1000_unmap_and_free_tx_resource(adapter,
1816                                 &tx_ring->previous_buffer_info);
1817         }
1818
1819         for(i = 0; i < tx_ring->count; i++) {
1820                 buffer_info = &tx_ring->buffer_info[i];
1821                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1822         }
1823
1824         size = sizeof(struct e1000_buffer) * tx_ring->count;
1825         memset(tx_ring->buffer_info, 0, size);
1826
1827         /* Zero out the descriptor ring */
1828
1829         memset(tx_ring->desc, 0, tx_ring->size);
1830
1831         tx_ring->next_to_use = 0;
1832         tx_ring->next_to_clean = 0;
1833
1834         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1835         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1836 }
1837
1838 /**
1839  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1840  * @adapter: board private structure
1841  **/
1842
1843 static void
1844 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1845 {
1846         int i;
1847
1848         for (i = 0; i < adapter->num_queues; i++)
1849                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1850 }
1851
1852 /**
1853  * e1000_free_rx_resources - Free Rx Resources
1854  * @adapter: board private structure
1855  * @rx_ring: ring to clean the resources from
1856  *
1857  * Free all receive software resources
1858  **/
1859
1860 void
1861 e1000_free_rx_resources(struct e1000_adapter *adapter,
1862                         struct e1000_rx_ring *rx_ring)
1863 {
1864         struct pci_dev *pdev = adapter->pdev;
1865
1866         e1000_clean_rx_ring(adapter, rx_ring);
1867
1868         vfree(rx_ring->buffer_info);
1869         rx_ring->buffer_info = NULL;
1870         kfree(rx_ring->ps_page);
1871         rx_ring->ps_page = NULL;
1872         kfree(rx_ring->ps_page_dma);
1873         rx_ring->ps_page_dma = NULL;
1874
1875         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1876
1877         rx_ring->desc = NULL;
1878 }
1879
1880 /**
1881  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1882  * @adapter: board private structure
1883  *
1884  * Free all receive software resources
1885  **/
1886
1887 void
1888 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1889 {
1890         int i;
1891
1892         for (i = 0; i < adapter->num_queues; i++)
1893                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1894 }
1895
1896 /**
1897  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1898  * @adapter: board private structure
1899  * @rx_ring: ring to free buffers from
1900  **/
1901
1902 static void
1903 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1904                     struct e1000_rx_ring *rx_ring)
1905 {
1906         struct e1000_buffer *buffer_info;
1907         struct e1000_ps_page *ps_page;
1908         struct e1000_ps_page_dma *ps_page_dma;
1909         struct pci_dev *pdev = adapter->pdev;
1910         unsigned long size;
1911         unsigned int i, j;
1912
1913         /* Free all the Rx ring sk_buffs */
1914
1915         for(i = 0; i < rx_ring->count; i++) {
1916                 buffer_info = &rx_ring->buffer_info[i];
1917                 if(buffer_info->skb) {
1918                         ps_page = &rx_ring->ps_page[i];
1919                         ps_page_dma = &rx_ring->ps_page_dma[i];
1920                         pci_unmap_single(pdev,
1921                                          buffer_info->dma,
1922                                          buffer_info->length,
1923                                          PCI_DMA_FROMDEVICE);
1924
1925                         dev_kfree_skb(buffer_info->skb);
1926                         buffer_info->skb = NULL;
1927
1928                         for(j = 0; j < adapter->rx_ps_pages; j++) {
1929                                 if(!ps_page->ps_page[j]) break;
1930                                 pci_unmap_single(pdev,
1931                                                  ps_page_dma->ps_page_dma[j],
1932                                                  PAGE_SIZE, PCI_DMA_FROMDEVICE);
1933                                 ps_page_dma->ps_page_dma[j] = 0;
1934                                 put_page(ps_page->ps_page[j]);
1935                                 ps_page->ps_page[j] = NULL;
1936                         }
1937                 }
1938         }
1939
1940         size = sizeof(struct e1000_buffer) * rx_ring->count;
1941         memset(rx_ring->buffer_info, 0, size);
1942         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1943         memset(rx_ring->ps_page, 0, size);
1944         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1945         memset(rx_ring->ps_page_dma, 0, size);
1946
1947         /* Zero out the descriptor ring */
1948
1949         memset(rx_ring->desc, 0, rx_ring->size);
1950
1951         rx_ring->next_to_clean = 0;
1952         rx_ring->next_to_use = 0;
1953
1954         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1955         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1956 }
1957
1958 /**
1959  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
1960  * @adapter: board private structure
1961  **/
1962
1963 static void
1964 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
1965 {
1966         int i;
1967
1968         for (i = 0; i < adapter->num_queues; i++)
1969                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1970 }
1971
1972 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1973  * and memory write and invalidate disabled for certain operations
1974  */
1975 static void
1976 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1977 {
1978         struct net_device *netdev = adapter->netdev;
1979         uint32_t rctl;
1980
1981         e1000_pci_clear_mwi(&adapter->hw);
1982
1983         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1984         rctl |= E1000_RCTL_RST;
1985         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1986         E1000_WRITE_FLUSH(&adapter->hw);
1987         mdelay(5);
1988
1989         if(netif_running(netdev))
1990                 e1000_clean_all_rx_rings(adapter);
1991 }
1992
1993 static void
1994 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1995 {
1996         struct net_device *netdev = adapter->netdev;
1997         uint32_t rctl;
1998
1999         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2000         rctl &= ~E1000_RCTL_RST;
2001         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2002         E1000_WRITE_FLUSH(&adapter->hw);
2003         mdelay(5);
2004
2005         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2006                 e1000_pci_set_mwi(&adapter->hw);
2007
2008         if(netif_running(netdev)) {
2009                 e1000_configure_rx(adapter);
2010                 e1000_alloc_rx_buffers(adapter, &adapter->rx_ring[0]);
2011         }
2012 }
2013
2014 /**
2015  * e1000_set_mac - Change the Ethernet Address of the NIC
2016  * @netdev: network interface device structure
2017  * @p: pointer to an address structure
2018  *
2019  * Returns 0 on success, negative on failure
2020  **/
2021
2022 static int
2023 e1000_set_mac(struct net_device *netdev, void *p)
2024 {
2025         struct e1000_adapter *adapter = netdev_priv(netdev);
2026         struct sockaddr *addr = p;
2027
2028         if(!is_valid_ether_addr(addr->sa_data))
2029                 return -EADDRNOTAVAIL;
2030
2031         /* 82542 2.0 needs to be in reset to write receive address registers */
2032
2033         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2034                 e1000_enter_82542_rst(adapter);
2035
2036         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2037         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2038
2039         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2040
2041         /* With 82571 controllers, LAA may be overwritten (with the default)
2042          * due to controller reset from the other port. */
2043         if (adapter->hw.mac_type == e1000_82571) {
2044                 /* activate the work around */
2045                 adapter->hw.laa_is_present = 1;
2046
2047                 /* Hold a copy of the LAA in RAR[14] This is done so that
2048                  * between the time RAR[0] gets clobbered  and the time it
2049                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2050                  * of the RARs and no incoming packets directed to this port
2051                  * are dropped. Eventaully the LAA will be in RAR[0] and
2052                  * RAR[14] */
2053                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2054                                         E1000_RAR_ENTRIES - 1);
2055         }
2056
2057         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2058                 e1000_leave_82542_rst(adapter);
2059
2060         return 0;
2061 }
2062
2063 /**
2064  * e1000_set_multi - Multicast and Promiscuous mode set
2065  * @netdev: network interface device structure
2066  *
2067  * The set_multi entry point is called whenever the multicast address
2068  * list or the network interface flags are updated.  This routine is
2069  * responsible for configuring the hardware for proper multicast,
2070  * promiscuous mode, and all-multi behavior.
2071  **/
2072
2073 static void
2074 e1000_set_multi(struct net_device *netdev)
2075 {
2076         struct e1000_adapter *adapter = netdev_priv(netdev);
2077         struct e1000_hw *hw = &adapter->hw;
2078         struct dev_mc_list *mc_ptr;
2079         uint32_t rctl;
2080         uint32_t hash_value;
2081         int i, rar_entries = E1000_RAR_ENTRIES;
2082
2083         /* reserve RAR[14] for LAA over-write work-around */
2084         if (adapter->hw.mac_type == e1000_82571)
2085                 rar_entries--;
2086
2087         /* Check for Promiscuous and All Multicast modes */
2088
2089         rctl = E1000_READ_REG(hw, RCTL);
2090
2091         if(netdev->flags & IFF_PROMISC) {
2092                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2093         } else if(netdev->flags & IFF_ALLMULTI) {
2094                 rctl |= E1000_RCTL_MPE;
2095                 rctl &= ~E1000_RCTL_UPE;
2096         } else {
2097                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2098         }
2099
2100         E1000_WRITE_REG(hw, RCTL, rctl);
2101
2102         /* 82542 2.0 needs to be in reset to write receive address registers */
2103
2104         if(hw->mac_type == e1000_82542_rev2_0)
2105                 e1000_enter_82542_rst(adapter);
2106
2107         /* load the first 14 multicast address into the exact filters 1-14
2108          * RAR 0 is used for the station MAC adddress
2109          * if there are not 14 addresses, go ahead and clear the filters
2110          * -- with 82571 controllers only 0-13 entries are filled here
2111          */
2112         mc_ptr = netdev->mc_list;
2113
2114         for(i = 1; i < rar_entries; i++) {
2115                 if (mc_ptr) {
2116                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2117                         mc_ptr = mc_ptr->next;
2118                 } else {
2119                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2120                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2121                 }
2122         }
2123
2124         /* clear the old settings from the multicast hash table */
2125
2126         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2127                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2128
2129         /* load any remaining addresses into the hash table */
2130
2131         for(; mc_ptr; mc_ptr = mc_ptr->next) {
2132                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2133                 e1000_mta_set(hw, hash_value);
2134         }
2135
2136         if(hw->mac_type == e1000_82542_rev2_0)
2137                 e1000_leave_82542_rst(adapter);
2138 }
2139
2140 /* Need to wait a few seconds after link up to get diagnostic information from
2141  * the phy */
2142
2143 static void
2144 e1000_update_phy_info(unsigned long data)
2145 {
2146         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2147         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2148 }
2149
2150 /**
2151  * e1000_82547_tx_fifo_stall - Timer Call-back
2152  * @data: pointer to adapter cast into an unsigned long
2153  **/
2154
2155 static void
2156 e1000_82547_tx_fifo_stall(unsigned long data)
2157 {
2158         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2159         struct net_device *netdev = adapter->netdev;
2160         uint32_t tctl;
2161
2162         if(atomic_read(&adapter->tx_fifo_stall)) {
2163                 if((E1000_READ_REG(&adapter->hw, TDT) ==
2164                     E1000_READ_REG(&adapter->hw, TDH)) &&
2165                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2166                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2167                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2168                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2169                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2170                         E1000_WRITE_REG(&adapter->hw, TCTL,
2171                                         tctl & ~E1000_TCTL_EN);
2172                         E1000_WRITE_REG(&adapter->hw, TDFT,
2173                                         adapter->tx_head_addr);
2174                         E1000_WRITE_REG(&adapter->hw, TDFH,
2175                                         adapter->tx_head_addr);
2176                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2177                                         adapter->tx_head_addr);
2178                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2179                                         adapter->tx_head_addr);
2180                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2181                         E1000_WRITE_FLUSH(&adapter->hw);
2182
2183                         adapter->tx_fifo_head = 0;
2184                         atomic_set(&adapter->tx_fifo_stall, 0);
2185                         netif_wake_queue(netdev);
2186                 } else {
2187                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2188                 }
2189         }
2190 }
2191
2192 /**
2193  * e1000_watchdog - Timer Call-back
2194  * @data: pointer to adapter cast into an unsigned long
2195  **/
2196 static void
2197 e1000_watchdog(unsigned long data)
2198 {
2199         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2200
2201         /* Do the rest outside of interrupt context */
2202         schedule_work(&adapter->watchdog_task);
2203 }
2204
2205 static void
2206 e1000_watchdog_task(struct e1000_adapter *adapter)
2207 {
2208         struct net_device *netdev = adapter->netdev;
2209         struct e1000_tx_ring *txdr = &adapter->tx_ring[0];
2210         uint32_t link;
2211
2212         e1000_check_for_link(&adapter->hw);
2213         if (adapter->hw.mac_type == e1000_82573) {
2214                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2215                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2216                         e1000_update_mng_vlan(adapter);
2217         }
2218
2219         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2220            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2221                 link = !adapter->hw.serdes_link_down;
2222         else
2223                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2224
2225         if(link) {
2226                 if(!netif_carrier_ok(netdev)) {
2227                         e1000_get_speed_and_duplex(&adapter->hw,
2228                                                    &adapter->link_speed,
2229                                                    &adapter->link_duplex);
2230
2231                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2232                                adapter->link_speed,
2233                                adapter->link_duplex == FULL_DUPLEX ?
2234                                "Full Duplex" : "Half Duplex");
2235
2236                         netif_carrier_on(netdev);
2237                         netif_wake_queue(netdev);
2238                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2239                         adapter->smartspeed = 0;
2240                 }
2241         } else {
2242                 if(netif_carrier_ok(netdev)) {
2243                         adapter->link_speed = 0;
2244                         adapter->link_duplex = 0;
2245                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2246                         netif_carrier_off(netdev);
2247                         netif_stop_queue(netdev);
2248                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2249                 }
2250
2251                 e1000_smartspeed(adapter);
2252         }
2253
2254         e1000_update_stats(adapter);
2255
2256         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2257         adapter->tpt_old = adapter->stats.tpt;
2258         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2259         adapter->colc_old = adapter->stats.colc;
2260
2261         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2262         adapter->gorcl_old = adapter->stats.gorcl;
2263         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2264         adapter->gotcl_old = adapter->stats.gotcl;
2265
2266         e1000_update_adaptive(&adapter->hw);
2267
2268         if (adapter->num_queues == 1 && !netif_carrier_ok(netdev)) {
2269                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2270                         /* We've lost link, so the controller stops DMA,
2271                          * but we've got queued Tx work that's never going
2272                          * to get done, so reset controller to flush Tx.
2273                          * (Do the reset outside of interrupt context). */
2274                         schedule_work(&adapter->tx_timeout_task);
2275                 }
2276         }
2277
2278         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2279         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2280                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2281                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2282                  * else is between 2000-8000. */
2283                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2284                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2285                         adapter->gotcl - adapter->gorcl :
2286                         adapter->gorcl - adapter->gotcl) / 10000;
2287                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2288                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2289         }
2290
2291         /* Cause software interrupt to ensure rx ring is cleaned */
2292         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2293
2294         /* Force detection of hung controller every watchdog period */
2295         adapter->detect_tx_hung = TRUE;
2296
2297         /* With 82571 controllers, LAA may be overwritten due to controller
2298          * reset from the other port. Set the appropriate LAA in RAR[0] */
2299         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2300                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2301
2302         /* Reset the timer */
2303         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2304 }
2305
2306 #define E1000_TX_FLAGS_CSUM             0x00000001
2307 #define E1000_TX_FLAGS_VLAN             0x00000002
2308 #define E1000_TX_FLAGS_TSO              0x00000004
2309 #define E1000_TX_FLAGS_IPV4             0x00000008
2310 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2311 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2312
2313 static inline int
2314 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2315           struct sk_buff *skb)
2316 {
2317 #ifdef NETIF_F_TSO
2318         struct e1000_context_desc *context_desc;
2319         unsigned int i;
2320         uint32_t cmd_length = 0;
2321         uint16_t ipcse = 0, tucse, mss;
2322         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2323         int err;
2324
2325         if(skb_shinfo(skb)->tso_size) {
2326                 if (skb_header_cloned(skb)) {
2327                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2328                         if (err)
2329                                 return err;
2330                 }
2331
2332                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2333                 mss = skb_shinfo(skb)->tso_size;
2334                 if(skb->protocol == ntohs(ETH_P_IP)) {
2335                         skb->nh.iph->tot_len = 0;
2336                         skb->nh.iph->check = 0;
2337                         skb->h.th->check =
2338                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2339                                                    skb->nh.iph->daddr,
2340                                                    0,
2341                                                    IPPROTO_TCP,
2342                                                    0);
2343                         cmd_length = E1000_TXD_CMD_IP;
2344                         ipcse = skb->h.raw - skb->data - 1;
2345 #ifdef NETIF_F_TSO_IPV6
2346                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2347                         skb->nh.ipv6h->payload_len = 0;
2348                         skb->h.th->check =
2349                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2350                                                  &skb->nh.ipv6h->daddr,
2351                                                  0,
2352                                                  IPPROTO_TCP,
2353                                                  0);
2354                         ipcse = 0;
2355 #endif
2356                 }
2357                 ipcss = skb->nh.raw - skb->data;
2358                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2359                 tucss = skb->h.raw - skb->data;
2360                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2361                 tucse = 0;
2362
2363                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2364                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2365
2366                 i = tx_ring->next_to_use;
2367                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2368
2369                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2370                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2371                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2372                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2373                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2374                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2375                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2376                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2377                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2378
2379                 if (++i == tx_ring->count) i = 0;
2380                 tx_ring->next_to_use = i;
2381
2382                 return 1;
2383         }
2384 #endif
2385
2386         return 0;
2387 }
2388
2389 static inline boolean_t
2390 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2391               struct sk_buff *skb)
2392 {
2393         struct e1000_context_desc *context_desc;
2394         unsigned int i;
2395         uint8_t css;
2396
2397         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2398                 css = skb->h.raw - skb->data;
2399
2400                 i = tx_ring->next_to_use;
2401                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2402
2403                 context_desc->upper_setup.tcp_fields.tucss = css;
2404                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2405                 context_desc->upper_setup.tcp_fields.tucse = 0;
2406                 context_desc->tcp_seg_setup.data = 0;
2407                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2408
2409                 if (unlikely(++i == tx_ring->count)) i = 0;
2410                 tx_ring->next_to_use = i;
2411
2412                 return TRUE;
2413         }
2414
2415         return FALSE;
2416 }
2417
2418 #define E1000_MAX_TXD_PWR       12
2419 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2420
2421 static inline int
2422 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2423              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2424              unsigned int nr_frags, unsigned int mss)
2425 {
2426         struct e1000_buffer *buffer_info;
2427         unsigned int len = skb->len;
2428         unsigned int offset = 0, size, count = 0, i;
2429         unsigned int f;
2430         len -= skb->data_len;
2431
2432         i = tx_ring->next_to_use;
2433
2434         while(len) {
2435                 buffer_info = &tx_ring->buffer_info[i];
2436                 size = min(len, max_per_txd);
2437 #ifdef NETIF_F_TSO
2438                 /* Workaround for premature desc write-backs
2439                  * in TSO mode.  Append 4-byte sentinel desc */
2440                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2441                         size -= 4;
2442 #endif
2443                 /* work-around for errata 10 and it applies
2444                  * to all controllers in PCI-X mode
2445                  * The fix is to make sure that the first descriptor of a
2446                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2447                  */
2448                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2449                                 (size > 2015) && count == 0))
2450                         size = 2015;
2451
2452                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2453                  * terminating buffers within evenly-aligned dwords. */
2454                 if(unlikely(adapter->pcix_82544 &&
2455                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2456                    size > 4))
2457                         size -= 4;
2458
2459                 buffer_info->length = size;
2460                 buffer_info->dma =
2461                         pci_map_single(adapter->pdev,
2462                                 skb->data + offset,
2463                                 size,
2464                                 PCI_DMA_TODEVICE);
2465                 buffer_info->time_stamp = jiffies;
2466
2467                 len -= size;
2468                 offset += size;
2469                 count++;
2470                 if(unlikely(++i == tx_ring->count)) i = 0;
2471         }
2472
2473         for(f = 0; f < nr_frags; f++) {
2474                 struct skb_frag_struct *frag;
2475
2476                 frag = &skb_shinfo(skb)->frags[f];
2477                 len = frag->size;
2478                 offset = frag->page_offset;
2479
2480                 while(len) {
2481                         buffer_info = &tx_ring->buffer_info[i];
2482                         size = min(len, max_per_txd);
2483 #ifdef NETIF_F_TSO
2484                         /* Workaround for premature desc write-backs
2485                          * in TSO mode.  Append 4-byte sentinel desc */
2486                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2487                                 size -= 4;
2488 #endif
2489                         /* Workaround for potential 82544 hang in PCI-X.
2490                          * Avoid terminating buffers within evenly-aligned
2491                          * dwords. */
2492                         if(unlikely(adapter->pcix_82544 &&
2493                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2494                            size > 4))
2495                                 size -= 4;
2496
2497                         buffer_info->length = size;
2498                         buffer_info->dma =
2499                                 pci_map_page(adapter->pdev,
2500                                         frag->page,
2501                                         offset,
2502                                         size,
2503                                         PCI_DMA_TODEVICE);
2504                         buffer_info->time_stamp = jiffies;
2505
2506                         len -= size;
2507                         offset += size;
2508                         count++;
2509                         if(unlikely(++i == tx_ring->count)) i = 0;
2510                 }
2511         }
2512
2513         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2514         tx_ring->buffer_info[i].skb = skb;
2515         tx_ring->buffer_info[first].next_to_watch = i;
2516
2517         return count;
2518 }
2519
2520 static inline void
2521 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2522                int tx_flags, int count)
2523 {
2524         struct e1000_tx_desc *tx_desc = NULL;
2525         struct e1000_buffer *buffer_info;
2526         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2527         unsigned int i;
2528
2529         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2530                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2531                              E1000_TXD_CMD_TSE;
2532                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2533
2534                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2535                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2536         }
2537
2538         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2539                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2540                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2541         }
2542
2543         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2544                 txd_lower |= E1000_TXD_CMD_VLE;
2545                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2546         }
2547
2548         i = tx_ring->next_to_use;
2549
2550         while(count--) {
2551                 buffer_info = &tx_ring->buffer_info[i];
2552                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2553                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2554                 tx_desc->lower.data =
2555                         cpu_to_le32(txd_lower | buffer_info->length);
2556                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2557                 if(unlikely(++i == tx_ring->count)) i = 0;
2558         }
2559
2560         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2561
2562         /* Force memory writes to complete before letting h/w
2563          * know there are new descriptors to fetch.  (Only
2564          * applicable for weak-ordered memory model archs,
2565          * such as IA-64). */
2566         wmb();
2567
2568         tx_ring->next_to_use = i;
2569         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2570 }
2571
2572 /**
2573  * 82547 workaround to avoid controller hang in half-duplex environment.
2574  * The workaround is to avoid queuing a large packet that would span
2575  * the internal Tx FIFO ring boundary by notifying the stack to resend
2576  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2577  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2578  * to the beginning of the Tx FIFO.
2579  **/
2580
2581 #define E1000_FIFO_HDR                  0x10
2582 #define E1000_82547_PAD_LEN             0x3E0
2583
2584 static inline int
2585 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2586 {
2587         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2588         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2589
2590         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2591
2592         if(adapter->link_duplex != HALF_DUPLEX)
2593                 goto no_fifo_stall_required;
2594
2595         if(atomic_read(&adapter->tx_fifo_stall))
2596                 return 1;
2597
2598         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2599                 atomic_set(&adapter->tx_fifo_stall, 1);
2600                 return 1;
2601         }
2602
2603 no_fifo_stall_required:
2604         adapter->tx_fifo_head += skb_fifo_len;
2605         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2606                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2607         return 0;
2608 }
2609
2610 #define MINIMUM_DHCP_PACKET_SIZE 282
2611 static inline int
2612 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2613 {
2614         struct e1000_hw *hw =  &adapter->hw;
2615         uint16_t length, offset;
2616         if(vlan_tx_tag_present(skb)) {
2617                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2618                         ( adapter->hw.mng_cookie.status &
2619                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2620                         return 0;
2621         }
2622         if(htons(ETH_P_IP) == skb->protocol) {
2623                 const struct iphdr *ip = skb->nh.iph;
2624                 if(IPPROTO_UDP == ip->protocol) {
2625                         struct udphdr *udp = (struct udphdr *)(skb->h.uh);
2626                         if(ntohs(udp->dest) == 67) {
2627                                 offset = (uint8_t *)udp + 8 - skb->data;
2628                                 length = skb->len - offset;
2629
2630                                 return e1000_mng_write_dhcp_info(hw,
2631                                                 (uint8_t *)udp + 8, length);
2632                         }
2633                 }
2634         } else if((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2635                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2636                 if((htons(ETH_P_IP) == eth->h_proto)) {
2637                         const struct iphdr *ip =
2638                                 (struct iphdr *)((uint8_t *)skb->data+14);
2639                         if(IPPROTO_UDP == ip->protocol) {
2640                                 struct udphdr *udp =
2641                                         (struct udphdr *)((uint8_t *)ip +
2642                                                 (ip->ihl << 2));
2643                                 if(ntohs(udp->dest) == 67) {
2644                                         offset = (uint8_t *)udp + 8 - skb->data;
2645                                         length = skb->len - offset;
2646
2647                                         return e1000_mng_write_dhcp_info(hw,
2648                                                         (uint8_t *)udp + 8,
2649                                                         length);
2650                                 }
2651                         }
2652                 }
2653         }
2654         return 0;
2655 }
2656
2657 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2658 static int
2659 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2660 {
2661         struct e1000_adapter *adapter = netdev_priv(netdev);
2662         struct e1000_tx_ring *tx_ring;
2663         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2664         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2665         unsigned int tx_flags = 0;
2666         unsigned int len = skb->len;
2667         unsigned long flags;
2668         unsigned int nr_frags = 0;
2669         unsigned int mss = 0;
2670         int count = 0;
2671         int tso;
2672         unsigned int f;
2673         len -= skb->data_len;
2674
2675 #ifdef CONFIG_E1000_MQ
2676         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2677 #else
2678         tx_ring = adapter->tx_ring;
2679 #endif
2680
2681         if (unlikely(skb->len <= 0)) {
2682                 dev_kfree_skb_any(skb);
2683                 return NETDEV_TX_OK;
2684         }
2685
2686 #ifdef NETIF_F_TSO
2687         mss = skb_shinfo(skb)->tso_size;
2688         /* The controller does a simple calculation to
2689          * make sure there is enough room in the FIFO before
2690          * initiating the DMA for each buffer.  The calc is:
2691          * 4 = ceil(buffer len/mss).  To make sure we don't
2692          * overrun the FIFO, adjust the max buffer len if mss
2693          * drops. */
2694         if(mss) {
2695                 max_per_txd = min(mss << 2, max_per_txd);
2696                 max_txd_pwr = fls(max_per_txd) - 1;
2697         }
2698
2699         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2700                 count++;
2701         count++;
2702 #else
2703         if(skb->ip_summed == CHECKSUM_HW)
2704                 count++;
2705 #endif
2706         count += TXD_USE_COUNT(len, max_txd_pwr);
2707
2708         if(adapter->pcix_82544)
2709                 count++;
2710
2711         /* work-around for errata 10 and it applies to all controllers
2712          * in PCI-X mode, so add one more descriptor to the count
2713          */
2714         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2715                         (len > 2015)))
2716                 count++;
2717
2718         nr_frags = skb_shinfo(skb)->nr_frags;
2719         for(f = 0; f < nr_frags; f++)
2720                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2721                                        max_txd_pwr);
2722         if(adapter->pcix_82544)
2723                 count += nr_frags;
2724
2725 #ifdef NETIF_F_TSO
2726         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2727          * points to just header, pull a few bytes of payload from
2728          * frags into skb->data */
2729         if (skb_shinfo(skb)->tso_size) {
2730                 uint8_t hdr_len;
2731                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2732                 if (skb->data_len && (hdr_len < (skb->len - skb->data_len)) &&
2733                         (adapter->hw.mac_type == e1000_82571 ||
2734                         adapter->hw.mac_type == e1000_82572)) {
2735                         unsigned int pull_size;
2736                         pull_size = min((unsigned int)4, skb->data_len);
2737                         if (!__pskb_pull_tail(skb, pull_size)) {
2738                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2739                                 dev_kfree_skb_any(skb);
2740                                 return -EFAULT;
2741                         }
2742                 }
2743         }
2744 #endif
2745
2746         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2747                 e1000_transfer_dhcp_info(adapter, skb);
2748
2749         local_irq_save(flags);
2750         if (!spin_trylock(&tx_ring->tx_lock)) {
2751                 /* Collision - tell upper layer to requeue */
2752                 local_irq_restore(flags);
2753                 return NETDEV_TX_LOCKED;
2754         }
2755
2756         /* need: count + 2 desc gap to keep tail from touching
2757          * head, otherwise try next time */
2758         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2759                 netif_stop_queue(netdev);
2760                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2761                 return NETDEV_TX_BUSY;
2762         }
2763
2764         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2765                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2766                         netif_stop_queue(netdev);
2767                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2768                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2769                         return NETDEV_TX_BUSY;
2770                 }
2771         }
2772
2773         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2774                 tx_flags |= E1000_TX_FLAGS_VLAN;
2775                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2776         }
2777
2778         first = tx_ring->next_to_use;
2779
2780         tso = e1000_tso(adapter, tx_ring, skb);
2781         if (tso < 0) {
2782                 dev_kfree_skb_any(skb);
2783                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2784                 return NETDEV_TX_OK;
2785         }
2786
2787         if (likely(tso))
2788                 tx_flags |= E1000_TX_FLAGS_TSO;
2789         else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2790                 tx_flags |= E1000_TX_FLAGS_CSUM;
2791
2792         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2793          * 82571 hardware supports TSO capabilities for IPv6 as well...
2794          * no longer assume, we must. */
2795         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2796                 tx_flags |= E1000_TX_FLAGS_IPV4;
2797
2798         e1000_tx_queue(adapter, tx_ring, tx_flags,
2799                        e1000_tx_map(adapter, tx_ring, skb, first,
2800                                     max_per_txd, nr_frags, mss));
2801
2802         netdev->trans_start = jiffies;
2803
2804         /* Make sure there is space in the ring for the next send. */
2805         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2806                 netif_stop_queue(netdev);
2807
2808         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2809         return NETDEV_TX_OK;
2810 }
2811
2812 /**
2813  * e1000_tx_timeout - Respond to a Tx Hang
2814  * @netdev: network interface device structure
2815  **/
2816
2817 static void
2818 e1000_tx_timeout(struct net_device *netdev)
2819 {
2820         struct e1000_adapter *adapter = netdev_priv(netdev);
2821
2822         /* Do the reset outside of interrupt context */
2823         schedule_work(&adapter->tx_timeout_task);
2824 }
2825
2826 static void
2827 e1000_tx_timeout_task(struct net_device *netdev)
2828 {
2829         struct e1000_adapter *adapter = netdev_priv(netdev);
2830
2831         e1000_down(adapter);
2832         e1000_up(adapter);
2833 }
2834
2835 /**
2836  * e1000_get_stats - Get System Network Statistics
2837  * @netdev: network interface device structure
2838  *
2839  * Returns the address of the device statistics structure.
2840  * The statistics are actually updated from the timer callback.
2841  **/
2842
2843 static struct net_device_stats *
2844 e1000_get_stats(struct net_device *netdev)
2845 {
2846         struct e1000_adapter *adapter = netdev_priv(netdev);
2847
2848         e1000_update_stats(adapter);
2849         return &adapter->net_stats;
2850 }
2851
2852 /**
2853  * e1000_change_mtu - Change the Maximum Transfer Unit
2854  * @netdev: network interface device structure
2855  * @new_mtu: new value for maximum frame size
2856  *
2857  * Returns 0 on success, negative on failure
2858  **/
2859
2860 static int
2861 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2862 {
2863         struct e1000_adapter *adapter = netdev_priv(netdev);
2864         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2865
2866         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2867                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2868                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2869                         return -EINVAL;
2870         }
2871
2872 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2873         /* might want this to be bigger enum check... */
2874         /* 82571 controllers limit jumbo frame size to 10500 bytes */
2875         if ((adapter->hw.mac_type == e1000_82571 ||
2876              adapter->hw.mac_type == e1000_82572) &&
2877             max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2878                 DPRINTK(PROBE, ERR, "MTU > 9216 bytes not supported "
2879                                     "on 82571 and 82572 controllers.\n");
2880                 return -EINVAL;
2881         }
2882
2883         if(adapter->hw.mac_type == e1000_82573 &&
2884             max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2885                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2886                                     "on 82573\n");
2887                 return -EINVAL;
2888         }
2889
2890         if(adapter->hw.mac_type > e1000_82547_rev_2) {
2891                 adapter->rx_buffer_len = max_frame;
2892                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
2893         } else {
2894                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
2895                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
2896                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2897                                             "on 82542\n");
2898                         return -EINVAL;
2899
2900                 } else {
2901                         if(max_frame <= E1000_RXBUFFER_2048) {
2902                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2903                         } else if(max_frame <= E1000_RXBUFFER_4096) {
2904                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2905                         } else if(max_frame <= E1000_RXBUFFER_8192) {
2906                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2907                         } else if(max_frame <= E1000_RXBUFFER_16384) {
2908                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2909                         }
2910                 }
2911         }
2912
2913         netdev->mtu = new_mtu;
2914
2915         if(netif_running(netdev)) {
2916                 e1000_down(adapter);
2917                 e1000_up(adapter);
2918         }
2919
2920         adapter->hw.max_frame_size = max_frame;
2921
2922         return 0;
2923 }
2924
2925 /**
2926  * e1000_update_stats - Update the board statistics counters
2927  * @adapter: board private structure
2928  **/
2929
2930 void
2931 e1000_update_stats(struct e1000_adapter *adapter)
2932 {
2933         struct e1000_hw *hw = &adapter->hw;
2934         unsigned long flags;
2935         uint16_t phy_tmp;
2936
2937 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2938
2939         spin_lock_irqsave(&adapter->stats_lock, flags);
2940
2941         /* these counters are modified from e1000_adjust_tbi_stats,
2942          * called from the interrupt context, so they must only
2943          * be written while holding adapter->stats_lock
2944          */
2945
2946         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2947         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2948         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2949         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2950         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2951         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2952         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2953         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2954         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2955         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2956         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2957         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2958         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2959
2960         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2961         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2962         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2963         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2964         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2965         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2966         adapter->stats.dc += E1000_READ_REG(hw, DC);
2967         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2968         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2969         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2970         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2971         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2972         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2973         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2974         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2975         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2976         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2977         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2978         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2979         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2980         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2981         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2982         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2983         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2984         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2985         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2986         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2987         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2988         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2989         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2990         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2991         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2992         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2993         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2994
2995         /* used for adaptive IFS */
2996
2997         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
2998         adapter->stats.tpt += hw->tx_packet_delta;
2999         hw->collision_delta = E1000_READ_REG(hw, COLC);
3000         adapter->stats.colc += hw->collision_delta;
3001
3002         if(hw->mac_type >= e1000_82543) {
3003                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3004                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3005                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3006                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3007                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3008                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3009         }
3010         if(hw->mac_type > e1000_82547_rev_2) {
3011                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3012                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3013                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3014                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3015                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3016                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3017                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3018                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3019                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3020         }
3021
3022         /* Fill out the OS statistics structure */
3023
3024         adapter->net_stats.rx_packets = adapter->stats.gprc;
3025         adapter->net_stats.tx_packets = adapter->stats.gptc;
3026         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3027         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3028         adapter->net_stats.multicast = adapter->stats.mprc;
3029         adapter->net_stats.collisions = adapter->stats.colc;
3030
3031         /* Rx Errors */
3032
3033         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3034                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3035                 adapter->stats.rlec + adapter->stats.mpc +
3036                 adapter->stats.cexterr;
3037         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3038         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3039         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3040         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
3041         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3042
3043         /* Tx Errors */
3044
3045         adapter->net_stats.tx_errors = adapter->stats.ecol +
3046                                        adapter->stats.latecol;
3047         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3048         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3049         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3050
3051         /* Tx Dropped needs to be maintained elsewhere */
3052
3053         /* Phy Stats */
3054
3055         if(hw->media_type == e1000_media_type_copper) {
3056                 if((adapter->link_speed == SPEED_1000) &&
3057                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3058                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3059                         adapter->phy_stats.idle_errors += phy_tmp;
3060                 }
3061
3062                 if((hw->mac_type <= e1000_82546) &&
3063                    (hw->phy_type == e1000_phy_m88) &&
3064                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3065                         adapter->phy_stats.receive_errors += phy_tmp;
3066         }
3067
3068         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3069 }
3070
3071 #ifdef CONFIG_E1000_MQ
3072 void
3073 e1000_rx_schedule(void *data)
3074 {
3075         struct net_device *poll_dev, *netdev = data;
3076         struct e1000_adapter *adapter = netdev->priv;
3077         int this_cpu = get_cpu();
3078
3079         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3080         if (poll_dev == NULL) {
3081                 put_cpu();
3082                 return;
3083         }
3084
3085         if (likely(netif_rx_schedule_prep(poll_dev)))
3086                 __netif_rx_schedule(poll_dev);
3087         else
3088                 e1000_irq_enable(adapter);
3089
3090         put_cpu();
3091 }
3092 #endif
3093
3094 /**
3095  * e1000_intr - Interrupt Handler
3096  * @irq: interrupt number
3097  * @data: pointer to a network interface device structure
3098  * @pt_regs: CPU registers structure
3099  **/
3100
3101 static irqreturn_t
3102 e1000_intr(int irq, void *data, struct pt_regs *regs)
3103 {
3104         struct net_device *netdev = data;
3105         struct e1000_adapter *adapter = netdev_priv(netdev);
3106         struct e1000_hw *hw = &adapter->hw;
3107         uint32_t icr = E1000_READ_REG(hw, ICR);
3108 #if defined(CONFIG_E1000_NAPI) && defined(CONFIG_E1000_MQ) || !defined(CONFIG_E1000_NAPI)
3109         int i;
3110 #endif
3111
3112         if(unlikely(!icr))
3113                 return IRQ_NONE;  /* Not our interrupt */
3114
3115         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3116                 hw->get_link_status = 1;
3117                 mod_timer(&adapter->watchdog_timer, jiffies);
3118         }
3119
3120 #ifdef CONFIG_E1000_NAPI
3121         atomic_inc(&adapter->irq_sem);
3122         E1000_WRITE_REG(hw, IMC, ~0);
3123         E1000_WRITE_FLUSH(hw);
3124 #ifdef CONFIG_E1000_MQ
3125         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3126                 cpu_set(adapter->cpu_for_queue[0],
3127                         adapter->rx_sched_call_data.cpumask);
3128                 for (i = 1; i < adapter->num_queues; i++) {
3129                         cpu_set(adapter->cpu_for_queue[i],
3130                                 adapter->rx_sched_call_data.cpumask);
3131                         atomic_inc(&adapter->irq_sem);
3132                 }
3133                 atomic_set(&adapter->rx_sched_call_data.count, i);
3134                 smp_call_async_mask(&adapter->rx_sched_call_data);
3135         } else {
3136                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3137         }
3138 #else /* if !CONFIG_E1000_MQ */
3139         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3140                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3141         else
3142                 e1000_irq_enable(adapter);
3143 #endif /* CONFIG_E1000_MQ */
3144
3145 #else /* if !CONFIG_E1000_NAPI */
3146         /* Writing IMC and IMS is needed for 82547.
3147            Due to Hub Link bus being occupied, an interrupt
3148            de-assertion message is not able to be sent.
3149            When an interrupt assertion message is generated later,
3150            two messages are re-ordered and sent out.
3151            That causes APIC to think 82547 is in de-assertion
3152            state, while 82547 is in assertion state, resulting
3153            in dead lock. Writing IMC forces 82547 into
3154            de-assertion state.
3155         */
3156         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3157                 atomic_inc(&adapter->irq_sem);
3158                 E1000_WRITE_REG(hw, IMC, ~0);
3159         }
3160
3161         for(i = 0; i < E1000_MAX_INTR; i++)
3162                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3163                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3164                         break;
3165
3166         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3167                 e1000_irq_enable(adapter);
3168
3169 #endif /* CONFIG_E1000_NAPI */
3170
3171         return IRQ_HANDLED;
3172 }
3173
3174 #ifdef CONFIG_E1000_NAPI
3175 /**
3176  * e1000_clean - NAPI Rx polling callback
3177  * @adapter: board private structure
3178  **/
3179
3180 static int
3181 e1000_clean(struct net_device *poll_dev, int *budget)
3182 {
3183         struct e1000_adapter *adapter;
3184         int work_to_do = min(*budget, poll_dev->quota);
3185         int tx_cleaned, i = 0, work_done = 0;
3186
3187         /* Must NOT use netdev_priv macro here. */
3188         adapter = poll_dev->priv;
3189
3190         /* Keep link state information with original netdev */
3191         if (!netif_carrier_ok(adapter->netdev))
3192                 goto quit_polling;
3193
3194         while (poll_dev != &adapter->polling_netdev[i]) {
3195                 i++;
3196                 if (unlikely(i == adapter->num_queues))
3197                         BUG();
3198         }
3199
3200         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3201         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3202                           &work_done, work_to_do);
3203
3204         *budget -= work_done;
3205         poll_dev->quota -= work_done;
3206
3207         /* If no Tx and not enough Rx work done, exit the polling mode */
3208         if((!tx_cleaned && (work_done == 0)) ||
3209            !netif_running(adapter->netdev)) {
3210 quit_polling:
3211                 netif_rx_complete(poll_dev);
3212                 e1000_irq_enable(adapter);
3213                 return 0;
3214         }
3215
3216         return 1;
3217 }
3218
3219 #endif
3220 /**
3221  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3222  * @adapter: board private structure
3223  **/
3224
3225 static boolean_t
3226 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3227                    struct e1000_tx_ring *tx_ring)
3228 {
3229         struct net_device *netdev = adapter->netdev;
3230         struct e1000_tx_desc *tx_desc, *eop_desc;
3231         struct e1000_buffer *buffer_info;
3232         unsigned int i, eop;
3233         boolean_t cleaned = FALSE;
3234
3235         i = tx_ring->next_to_clean;
3236         eop = tx_ring->buffer_info[i].next_to_watch;
3237         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3238
3239         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3240                 /* Premature writeback of Tx descriptors clear (free buffers
3241                  * and unmap pci_mapping) previous_buffer_info */
3242                 if (likely(tx_ring->previous_buffer_info.skb != NULL)) {
3243                         e1000_unmap_and_free_tx_resource(adapter,
3244                                         &tx_ring->previous_buffer_info);
3245                 }
3246
3247                 for(cleaned = FALSE; !cleaned; ) {
3248                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3249                         buffer_info = &tx_ring->buffer_info[i];
3250                         cleaned = (i == eop);
3251
3252 #ifdef NETIF_F_TSO
3253                         if (!(netdev->features & NETIF_F_TSO)) {
3254 #endif
3255                                 e1000_unmap_and_free_tx_resource(adapter,
3256                                                                  buffer_info);
3257 #ifdef NETIF_F_TSO
3258                         } else {
3259                                 if (cleaned) {
3260                                         memcpy(&tx_ring->previous_buffer_info,
3261                                                buffer_info,
3262                                                sizeof(struct e1000_buffer));
3263                                         memset(buffer_info, 0,
3264                                                sizeof(struct e1000_buffer));
3265                                 } else {
3266                                         e1000_unmap_and_free_tx_resource(
3267                                             adapter, buffer_info);
3268                                 }
3269                         }
3270 #endif
3271
3272                         tx_desc->buffer_addr = 0;
3273                         tx_desc->lower.data = 0;
3274                         tx_desc->upper.data = 0;
3275
3276                         if(unlikely(++i == tx_ring->count)) i = 0;
3277                 }
3278
3279                 tx_ring->pkt++;
3280
3281                 eop = tx_ring->buffer_info[i].next_to_watch;
3282                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3283         }
3284
3285         tx_ring->next_to_clean = i;
3286
3287         spin_lock(&tx_ring->tx_lock);
3288
3289         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3290                     netif_carrier_ok(netdev)))
3291                 netif_wake_queue(netdev);
3292
3293         spin_unlock(&tx_ring->tx_lock);
3294
3295         if (adapter->detect_tx_hung) {
3296                 /* Detect a transmit hang in hardware, this serializes the
3297                  * check with the clearing of time_stamp and movement of i */
3298                 adapter->detect_tx_hung = FALSE;
3299                 if (tx_ring->buffer_info[i].dma &&
3300                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
3301                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3302                         E1000_STATUS_TXOFF)) {
3303
3304                         /* detected Tx unit hang */
3305                         i = tx_ring->next_to_clean;
3306                         eop = tx_ring->buffer_info[i].next_to_watch;
3307                         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3308                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3309                                         "  TDH                  <%x>\n"
3310                                         "  TDT                  <%x>\n"
3311                                         "  next_to_use          <%x>\n"
3312                                         "  next_to_clean        <%x>\n"
3313                                         "buffer_info[next_to_clean]\n"
3314                                         "  dma                  <%llx>\n"
3315                                         "  time_stamp           <%lx>\n"
3316                                         "  next_to_watch        <%x>\n"
3317                                         "  jiffies              <%lx>\n"
3318                                         "  next_to_watch.status <%x>\n",
3319                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3320                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3321                                 tx_ring->next_to_use,
3322                                 i,
3323                                 (unsigned long long)tx_ring->buffer_info[i].dma,
3324                                 tx_ring->buffer_info[i].time_stamp,
3325                                 eop,
3326                                 jiffies,
3327                                 eop_desc->upper.fields.status);
3328                         netif_stop_queue(netdev);
3329                 }
3330         }
3331 #ifdef NETIF_F_TSO
3332         if (unlikely(!(eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3333             time_after(jiffies, tx_ring->previous_buffer_info.time_stamp + HZ)))
3334                 e1000_unmap_and_free_tx_resource(
3335                     adapter, &tx_ring->previous_buffer_info);
3336 #endif
3337         return cleaned;
3338 }
3339
3340 /**
3341  * e1000_rx_checksum - Receive Checksum Offload for 82543
3342  * @adapter:     board private structure
3343  * @status_err:  receive descriptor status and error fields
3344  * @csum:        receive descriptor csum field
3345  * @sk_buff:     socket buffer with received data
3346  **/
3347
3348 static inline void
3349 e1000_rx_checksum(struct e1000_adapter *adapter,
3350                   uint32_t status_err, uint32_t csum,
3351                   struct sk_buff *skb)
3352 {
3353         uint16_t status = (uint16_t)status_err;
3354         uint8_t errors = (uint8_t)(status_err >> 24);
3355         skb->ip_summed = CHECKSUM_NONE;
3356
3357         /* 82543 or newer only */
3358         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3359         /* Ignore Checksum bit is set */
3360         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3361         /* TCP/UDP checksum error bit is set */
3362         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3363                 /* let the stack verify checksum errors */
3364                 adapter->hw_csum_err++;
3365                 return;
3366         }
3367         /* TCP/UDP Checksum has not been calculated */
3368         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3369                 if(!(status & E1000_RXD_STAT_TCPCS))
3370                         return;
3371         } else {
3372                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3373                         return;
3374         }
3375         /* It must be a TCP or UDP packet with a valid checksum */
3376         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3377                 /* TCP checksum is good */
3378                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3379         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3380                 /* IP fragment with UDP payload */
3381                 /* Hardware complements the payload checksum, so we undo it
3382                  * and then put the value in host order for further stack use.
3383                  */
3384                 csum = ntohl(csum ^ 0xFFFF);
3385                 skb->csum = csum;
3386                 skb->ip_summed = CHECKSUM_HW;
3387         }
3388         adapter->hw_csum_good++;
3389 }
3390
3391 /**
3392  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3393  * @adapter: board private structure
3394  **/
3395
3396 static boolean_t
3397 #ifdef CONFIG_E1000_NAPI
3398 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3399                    struct e1000_rx_ring *rx_ring,
3400                    int *work_done, int work_to_do)
3401 #else
3402 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3403                    struct e1000_rx_ring *rx_ring)
3404 #endif
3405 {
3406         struct net_device *netdev = adapter->netdev;
3407         struct pci_dev *pdev = adapter->pdev;
3408         struct e1000_rx_desc *rx_desc;
3409         struct e1000_buffer *buffer_info;
3410         struct sk_buff *skb;
3411         unsigned long flags;
3412         uint32_t length;
3413         uint8_t last_byte;
3414         unsigned int i;
3415         boolean_t cleaned = FALSE;
3416
3417         i = rx_ring->next_to_clean;
3418         rx_desc = E1000_RX_DESC(*rx_ring, i);
3419
3420         while(rx_desc->status & E1000_RXD_STAT_DD) {
3421                 buffer_info = &rx_ring->buffer_info[i];
3422 #ifdef CONFIG_E1000_NAPI
3423                 if(*work_done >= work_to_do)
3424                         break;
3425                 (*work_done)++;
3426 #endif
3427                 cleaned = TRUE;
3428
3429                 pci_unmap_single(pdev,
3430                                  buffer_info->dma,
3431                                  buffer_info->length,
3432                                  PCI_DMA_FROMDEVICE);
3433
3434                 skb = buffer_info->skb;
3435                 length = le16_to_cpu(rx_desc->length);
3436
3437                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3438                         /* All receives must fit into a single buffer */
3439                         E1000_DBG("%s: Receive packet consumed multiple"
3440                                   " buffers\n", netdev->name);
3441                         dev_kfree_skb_irq(skb);
3442                         goto next_desc;
3443                 }
3444
3445                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3446                         last_byte = *(skb->data + length - 1);
3447                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3448                                       rx_desc->errors, length, last_byte)) {
3449                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3450                                 e1000_tbi_adjust_stats(&adapter->hw,
3451                                                        &adapter->stats,
3452                                                        length, skb->data);
3453                                 spin_unlock_irqrestore(&adapter->stats_lock,
3454                                                        flags);
3455                                 length--;
3456                         } else {
3457                                 dev_kfree_skb_irq(skb);
3458                                 goto next_desc;
3459                         }
3460                 }
3461
3462                 /* Good Receive */
3463                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3464
3465                 /* Receive Checksum Offload */
3466                 e1000_rx_checksum(adapter,
3467                                   (uint32_t)(rx_desc->status) |
3468                                   ((uint32_t)(rx_desc->errors) << 24),
3469                                   rx_desc->csum, skb);
3470                 skb->protocol = eth_type_trans(skb, netdev);
3471 #ifdef CONFIG_E1000_NAPI
3472                 if(unlikely(adapter->vlgrp &&
3473                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3474                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3475                                                  le16_to_cpu(rx_desc->special) &
3476                                                  E1000_RXD_SPC_VLAN_MASK);
3477                 } else {
3478                         netif_receive_skb(skb);
3479                 }
3480 #else /* CONFIG_E1000_NAPI */
3481                 if(unlikely(adapter->vlgrp &&
3482                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3483                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3484                                         le16_to_cpu(rx_desc->special) &
3485                                         E1000_RXD_SPC_VLAN_MASK);
3486                 } else {
3487                         netif_rx(skb);
3488                 }
3489 #endif /* CONFIG_E1000_NAPI */
3490                 netdev->last_rx = jiffies;
3491                 rx_ring->pkt++;
3492
3493 next_desc:
3494                 rx_desc->status = 0;
3495                 buffer_info->skb = NULL;
3496                 if(unlikely(++i == rx_ring->count)) i = 0;
3497
3498                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3499         }
3500         rx_ring->next_to_clean = i;
3501         adapter->alloc_rx_buf(adapter, rx_ring);
3502
3503         return cleaned;
3504 }
3505
3506 /**
3507  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3508  * @adapter: board private structure
3509  **/
3510
3511 static boolean_t
3512 #ifdef CONFIG_E1000_NAPI
3513 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3514                       struct e1000_rx_ring *rx_ring,
3515                       int *work_done, int work_to_do)
3516 #else
3517 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3518                       struct e1000_rx_ring *rx_ring)
3519 #endif
3520 {
3521         union e1000_rx_desc_packet_split *rx_desc;
3522         struct net_device *netdev = adapter->netdev;
3523         struct pci_dev *pdev = adapter->pdev;
3524         struct e1000_buffer *buffer_info;
3525         struct e1000_ps_page *ps_page;
3526         struct e1000_ps_page_dma *ps_page_dma;
3527         struct sk_buff *skb;
3528         unsigned int i, j;
3529         uint32_t length, staterr;
3530         boolean_t cleaned = FALSE;
3531
3532         i = rx_ring->next_to_clean;
3533         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3534         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3535
3536         while(staterr & E1000_RXD_STAT_DD) {
3537                 buffer_info = &rx_ring->buffer_info[i];
3538                 ps_page = &rx_ring->ps_page[i];
3539                 ps_page_dma = &rx_ring->ps_page_dma[i];
3540 #ifdef CONFIG_E1000_NAPI
3541                 if(unlikely(*work_done >= work_to_do))
3542                         break;
3543                 (*work_done)++;
3544 #endif
3545                 cleaned = TRUE;
3546                 pci_unmap_single(pdev, buffer_info->dma,
3547                                  buffer_info->length,
3548                                  PCI_DMA_FROMDEVICE);
3549
3550                 skb = buffer_info->skb;
3551
3552                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3553                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3554                                   " the full packet\n", netdev->name);
3555                         dev_kfree_skb_irq(skb);
3556                         goto next_desc;
3557                 }
3558
3559                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3560                         dev_kfree_skb_irq(skb);
3561                         goto next_desc;
3562                 }
3563
3564                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3565
3566                 if(unlikely(!length)) {
3567                         E1000_DBG("%s: Last part of the packet spanning"
3568                                   " multiple descriptors\n", netdev->name);
3569                         dev_kfree_skb_irq(skb);
3570                         goto next_desc;
3571                 }
3572
3573                 /* Good Receive */
3574                 skb_put(skb, length);
3575
3576                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3577                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3578                                 break;
3579
3580                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3581                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3582                         ps_page_dma->ps_page_dma[j] = 0;
3583                         skb_shinfo(skb)->frags[j].page =
3584                                 ps_page->ps_page[j];
3585                         ps_page->ps_page[j] = NULL;
3586                         skb_shinfo(skb)->frags[j].page_offset = 0;
3587                         skb_shinfo(skb)->frags[j].size = length;
3588                         skb_shinfo(skb)->nr_frags++;
3589                         skb->len += length;
3590                         skb->data_len += length;
3591                 }
3592
3593                 e1000_rx_checksum(adapter, staterr,
3594                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3595                 skb->protocol = eth_type_trans(skb, netdev);
3596
3597                 if(likely(rx_desc->wb.upper.header_status &
3598                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3599                         adapter->rx_hdr_split++;
3600 #ifdef HAVE_RX_ZERO_COPY
3601                         skb_shinfo(skb)->zero_copy = TRUE;
3602 #endif
3603                 }
3604 #ifdef CONFIG_E1000_NAPI
3605                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3606                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3607                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3608                                 E1000_RXD_SPC_VLAN_MASK);
3609                 } else {
3610                         netif_receive_skb(skb);
3611                 }
3612 #else /* CONFIG_E1000_NAPI */
3613                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3614                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3615                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3616                                 E1000_RXD_SPC_VLAN_MASK);
3617                 } else {
3618                         netif_rx(skb);
3619                 }
3620 #endif /* CONFIG_E1000_NAPI */
3621                 netdev->last_rx = jiffies;
3622                 rx_ring->pkt++;
3623
3624 next_desc:
3625                 rx_desc->wb.middle.status_error &= ~0xFF;
3626                 buffer_info->skb = NULL;
3627                 if(unlikely(++i == rx_ring->count)) i = 0;
3628
3629                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3630                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3631         }
3632         rx_ring->next_to_clean = i;
3633         adapter->alloc_rx_buf(adapter, rx_ring);
3634
3635         return cleaned;
3636 }
3637
3638 /**
3639  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3640  * @adapter: address of board private structure
3641  **/
3642
3643 static void
3644 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3645                        struct e1000_rx_ring *rx_ring)
3646 {
3647         struct net_device *netdev = adapter->netdev;
3648         struct pci_dev *pdev = adapter->pdev;
3649         struct e1000_rx_desc *rx_desc;
3650         struct e1000_buffer *buffer_info;
3651         struct sk_buff *skb;
3652         unsigned int i;
3653         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3654
3655         i = rx_ring->next_to_use;
3656         buffer_info = &rx_ring->buffer_info[i];
3657
3658         while(!buffer_info->skb) {
3659                 skb = dev_alloc_skb(bufsz);
3660
3661                 if(unlikely(!skb)) {
3662                         /* Better luck next round */
3663                         break;
3664                 }
3665
3666                 /* Fix for errata 23, can't cross 64kB boundary */
3667                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3668                         struct sk_buff *oldskb = skb;
3669                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3670                                              "at %p\n", bufsz, skb->data);
3671                         /* Try again, without freeing the previous */
3672                         skb = dev_alloc_skb(bufsz);
3673                         /* Failed allocation, critical failure */
3674                         if (!skb) {
3675                                 dev_kfree_skb(oldskb);
3676                                 break;
3677                         }
3678
3679                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3680                                 /* give up */
3681                                 dev_kfree_skb(skb);
3682                                 dev_kfree_skb(oldskb);
3683                                 break; /* while !buffer_info->skb */
3684                         } else {
3685                                 /* Use new allocation */
3686                                 dev_kfree_skb(oldskb);
3687                         }
3688                 }
3689                 /* Make buffer alignment 2 beyond a 16 byte boundary
3690                  * this will result in a 16 byte aligned IP header after
3691                  * the 14 byte MAC header is removed
3692                  */
3693                 skb_reserve(skb, NET_IP_ALIGN);
3694
3695                 skb->dev = netdev;
3696
3697                 buffer_info->skb = skb;
3698                 buffer_info->length = adapter->rx_buffer_len;
3699                 buffer_info->dma = pci_map_single(pdev,
3700                                                   skb->data,
3701                                                   adapter->rx_buffer_len,
3702                                                   PCI_DMA_FROMDEVICE);
3703
3704                 /* Fix for errata 23, can't cross 64kB boundary */
3705                 if (!e1000_check_64k_bound(adapter,
3706                                         (void *)(unsigned long)buffer_info->dma,
3707                                         adapter->rx_buffer_len)) {
3708                         DPRINTK(RX_ERR, ERR,
3709                                 "dma align check failed: %u bytes at %p\n",
3710                                 adapter->rx_buffer_len,
3711                                 (void *)(unsigned long)buffer_info->dma);
3712                         dev_kfree_skb(skb);
3713                         buffer_info->skb = NULL;
3714
3715                         pci_unmap_single(pdev, buffer_info->dma,
3716                                          adapter->rx_buffer_len,
3717                                          PCI_DMA_FROMDEVICE);
3718
3719                         break; /* while !buffer_info->skb */
3720                 }
3721                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3722                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3723
3724                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3725                         /* Force memory writes to complete before letting h/w
3726                          * know there are new descriptors to fetch.  (Only
3727                          * applicable for weak-ordered memory model archs,
3728                          * such as IA-64). */
3729                         wmb();
3730                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3731                 }
3732
3733                 if(unlikely(++i == rx_ring->count)) i = 0;
3734                 buffer_info = &rx_ring->buffer_info[i];
3735         }
3736
3737         rx_ring->next_to_use = i;
3738 }
3739
3740 /**
3741  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3742  * @adapter: address of board private structure
3743  **/
3744
3745 static void
3746 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3747                           struct e1000_rx_ring *rx_ring)
3748 {
3749         struct net_device *netdev = adapter->netdev;
3750         struct pci_dev *pdev = adapter->pdev;
3751         union e1000_rx_desc_packet_split *rx_desc;
3752         struct e1000_buffer *buffer_info;
3753         struct e1000_ps_page *ps_page;
3754         struct e1000_ps_page_dma *ps_page_dma;
3755         struct sk_buff *skb;
3756         unsigned int i, j;
3757
3758         i = rx_ring->next_to_use;
3759         buffer_info = &rx_ring->buffer_info[i];
3760         ps_page = &rx_ring->ps_page[i];
3761         ps_page_dma = &rx_ring->ps_page_dma[i];
3762
3763         while(!buffer_info->skb) {
3764                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3765
3766                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3767                         if (j < adapter->rx_ps_pages) {
3768                                 if (likely(!ps_page->ps_page[j])) {
3769                                         ps_page->ps_page[j] =
3770                                                 alloc_page(GFP_ATOMIC);
3771                                         if (unlikely(!ps_page->ps_page[j]))
3772                                                 goto no_buffers;
3773                                         ps_page_dma->ps_page_dma[j] =
3774                                                 pci_map_page(pdev,
3775                                                             ps_page->ps_page[j],
3776                                                             0, PAGE_SIZE,
3777                                                             PCI_DMA_FROMDEVICE);
3778                                 }
3779                                 /* Refresh the desc even if buffer_addrs didn't
3780                                  * change because each write-back erases
3781                                  * this info.
3782                                  */
3783                                 rx_desc->read.buffer_addr[j+1] =
3784                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3785                         } else
3786                                 rx_desc->read.buffer_addr[j+1] = ~0;
3787                 }
3788
3789                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3790
3791                 if(unlikely(!skb))
3792                         break;
3793
3794                 /* Make buffer alignment 2 beyond a 16 byte boundary
3795                  * this will result in a 16 byte aligned IP header after
3796                  * the 14 byte MAC header is removed
3797                  */
3798                 skb_reserve(skb, NET_IP_ALIGN);
3799
3800                 skb->dev = netdev;
3801
3802                 buffer_info->skb = skb;
3803                 buffer_info->length = adapter->rx_ps_bsize0;
3804                 buffer_info->dma = pci_map_single(pdev, skb->data,
3805                                                   adapter->rx_ps_bsize0,
3806                                                   PCI_DMA_FROMDEVICE);
3807
3808                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3809
3810                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3811                         /* Force memory writes to complete before letting h/w
3812                          * know there are new descriptors to fetch.  (Only
3813                          * applicable for weak-ordered memory model archs,
3814                          * such as IA-64). */
3815                         wmb();
3816                         /* Hardware increments by 16 bytes, but packet split
3817                          * descriptors are 32 bytes...so we increment tail
3818                          * twice as much.
3819                          */
3820                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3821                 }
3822
3823                 if(unlikely(++i == rx_ring->count)) i = 0;
3824                 buffer_info = &rx_ring->buffer_info[i];
3825                 ps_page = &rx_ring->ps_page[i];
3826                 ps_page_dma = &rx_ring->ps_page_dma[i];
3827         }
3828
3829 no_buffers:
3830         rx_ring->next_to_use = i;
3831 }
3832
3833 /**
3834  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3835  * @adapter:
3836  **/
3837
3838 static void
3839 e1000_smartspeed(struct e1000_adapter *adapter)
3840 {
3841         uint16_t phy_status;
3842         uint16_t phy_ctrl;
3843
3844         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3845            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3846                 return;
3847
3848         if(adapter->smartspeed == 0) {
3849                 /* If Master/Slave config fault is asserted twice,
3850                  * we assume back-to-back */
3851                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3852                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3853                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3854                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3855                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3856                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3857                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3858                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3859                                             phy_ctrl);
3860                         adapter->smartspeed++;
3861                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3862                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3863                                                &phy_ctrl)) {
3864                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3865                                              MII_CR_RESTART_AUTO_NEG);
3866                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3867                                                     phy_ctrl);
3868                         }
3869                 }
3870                 return;
3871         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
3872                 /* If still no link, perhaps using 2/3 pair cable */
3873                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3874                 phy_ctrl |= CR_1000T_MS_ENABLE;
3875                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
3876                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3877                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
3878                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3879                                      MII_CR_RESTART_AUTO_NEG);
3880                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
3881                 }
3882         }
3883         /* Restart process after E1000_SMARTSPEED_MAX iterations */
3884         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
3885                 adapter->smartspeed = 0;
3886 }
3887
3888 /**
3889  * e1000_ioctl -
3890  * @netdev:
3891  * @ifreq:
3892  * @cmd:
3893  **/
3894
3895 static int
3896 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3897 {
3898         switch (cmd) {
3899         case SIOCGMIIPHY:
3900         case SIOCGMIIREG:
3901         case SIOCSMIIREG:
3902                 return e1000_mii_ioctl(netdev, ifr, cmd);
3903         default:
3904                 return -EOPNOTSUPP;
3905         }
3906 }
3907
3908 /**
3909  * e1000_mii_ioctl -
3910  * @netdev:
3911  * @ifreq:
3912  * @cmd:
3913  **/
3914
3915 static int
3916 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3917 {
3918         struct e1000_adapter *adapter = netdev_priv(netdev);
3919         struct mii_ioctl_data *data = if_mii(ifr);
3920         int retval;
3921         uint16_t mii_reg;
3922         uint16_t spddplx;
3923         unsigned long flags;
3924
3925         if(adapter->hw.media_type != e1000_media_type_copper)
3926                 return -EOPNOTSUPP;
3927
3928         switch (cmd) {
3929         case SIOCGMIIPHY:
3930                 data->phy_id = adapter->hw.phy_addr;
3931                 break;
3932         case SIOCGMIIREG:
3933                 if(!capable(CAP_NET_ADMIN))
3934                         return -EPERM;
3935                 spin_lock_irqsave(&adapter->stats_lock, flags);
3936                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
3937                                    &data->val_out)) {
3938                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3939                         return -EIO;
3940                 }
3941                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3942                 break;
3943         case SIOCSMIIREG:
3944                 if(!capable(CAP_NET_ADMIN))
3945                         return -EPERM;
3946                 if(data->reg_num & ~(0x1F))
3947                         return -EFAULT;
3948                 mii_reg = data->val_in;
3949                 spin_lock_irqsave(&adapter->stats_lock, flags);
3950                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
3951                                         mii_reg)) {
3952                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3953                         return -EIO;
3954                 }
3955                 if(adapter->hw.phy_type == e1000_phy_m88) {
3956                         switch (data->reg_num) {
3957                         case PHY_CTRL:
3958                                 if(mii_reg & MII_CR_POWER_DOWN)
3959                                         break;
3960                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
3961                                         adapter->hw.autoneg = 1;
3962                                         adapter->hw.autoneg_advertised = 0x2F;
3963                                 } else {
3964                                         if (mii_reg & 0x40)
3965                                                 spddplx = SPEED_1000;
3966                                         else if (mii_reg & 0x2000)
3967                                                 spddplx = SPEED_100;
3968                                         else
3969                                                 spddplx = SPEED_10;
3970                                         spddplx += (mii_reg & 0x100)
3971                                                    ? FULL_DUPLEX :
3972                                                    HALF_DUPLEX;
3973                                         retval = e1000_set_spd_dplx(adapter,
3974                                                                     spddplx);
3975                                         if(retval) {
3976                                                 spin_unlock_irqrestore(
3977                                                         &adapter->stats_lock,
3978                                                         flags);
3979                                                 return retval;
3980                                         }
3981                                 }
3982                                 if(netif_running(adapter->netdev)) {
3983                                         e1000_down(adapter);
3984                                         e1000_up(adapter);
3985                                 } else
3986                                         e1000_reset(adapter);
3987                                 break;
3988                         case M88E1000_PHY_SPEC_CTRL:
3989                         case M88E1000_EXT_PHY_SPEC_CTRL:
3990                                 if(e1000_phy_reset(&adapter->hw)) {
3991                                         spin_unlock_irqrestore(
3992                                                 &adapter->stats_lock, flags);
3993                                         return -EIO;
3994                                 }
3995                                 break;
3996                         }
3997                 } else {
3998                         switch (data->reg_num) {
3999                         case PHY_CTRL:
4000                                 if(mii_reg & MII_CR_POWER_DOWN)
4001                                         break;
4002                                 if(netif_running(adapter->netdev)) {
4003                                         e1000_down(adapter);
4004                                         e1000_up(adapter);
4005                                 } else
4006                                         e1000_reset(adapter);
4007                                 break;
4008                         }
4009                 }
4010                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4011                 break;
4012         default:
4013                 return -EOPNOTSUPP;
4014         }
4015         return E1000_SUCCESS;
4016 }
4017
4018 void
4019 e1000_pci_set_mwi(struct e1000_hw *hw)
4020 {
4021         struct e1000_adapter *adapter = hw->back;
4022         int ret_val = pci_set_mwi(adapter->pdev);
4023
4024         if(ret_val)
4025                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4026 }
4027
4028 void
4029 e1000_pci_clear_mwi(struct e1000_hw *hw)
4030 {
4031         struct e1000_adapter *adapter = hw->back;
4032
4033         pci_clear_mwi(adapter->pdev);
4034 }
4035
4036 void
4037 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4038 {
4039         struct e1000_adapter *adapter = hw->back;
4040
4041         pci_read_config_word(adapter->pdev, reg, value);
4042 }
4043
4044 void
4045 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4046 {
4047         struct e1000_adapter *adapter = hw->back;
4048
4049         pci_write_config_word(adapter->pdev, reg, *value);
4050 }
4051
4052 uint32_t
4053 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4054 {
4055         return inl(port);
4056 }
4057
4058 void
4059 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4060 {
4061         outl(value, port);
4062 }
4063
4064 static void
4065 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4066 {
4067         struct e1000_adapter *adapter = netdev_priv(netdev);
4068         uint32_t ctrl, rctl;
4069
4070         e1000_irq_disable(adapter);
4071         adapter->vlgrp = grp;
4072
4073         if(grp) {
4074                 /* enable VLAN tag insert/strip */
4075                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4076                 ctrl |= E1000_CTRL_VME;
4077                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4078
4079                 /* enable VLAN receive filtering */
4080                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4081                 rctl |= E1000_RCTL_VFE;
4082                 rctl &= ~E1000_RCTL_CFIEN;
4083                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4084                 e1000_update_mng_vlan(adapter);
4085         } else {
4086                 /* disable VLAN tag insert/strip */
4087                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4088                 ctrl &= ~E1000_CTRL_VME;
4089                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4090
4091                 /* disable VLAN filtering */
4092                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4093                 rctl &= ~E1000_RCTL_VFE;
4094                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4095                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4096                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4097                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4098                 }
4099         }
4100
4101         e1000_irq_enable(adapter);
4102 }
4103
4104 static void
4105 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4106 {
4107         struct e1000_adapter *adapter = netdev_priv(netdev);
4108         uint32_t vfta, index;
4109         if((adapter->hw.mng_cookie.status &
4110                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4111                 (vid == adapter->mng_vlan_id))
4112                 return;
4113         /* add VID to filter table */
4114         index = (vid >> 5) & 0x7F;
4115         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4116         vfta |= (1 << (vid & 0x1F));
4117         e1000_write_vfta(&adapter->hw, index, vfta);
4118 }
4119
4120 static void
4121 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4122 {
4123         struct e1000_adapter *adapter = netdev_priv(netdev);
4124         uint32_t vfta, index;
4125
4126         e1000_irq_disable(adapter);
4127
4128         if(adapter->vlgrp)
4129                 adapter->vlgrp->vlan_devices[vid] = NULL;
4130
4131         e1000_irq_enable(adapter);
4132
4133         if((adapter->hw.mng_cookie.status &
4134                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4135                 (vid == adapter->mng_vlan_id))
4136                 return;
4137         /* remove VID from filter table */
4138         index = (vid >> 5) & 0x7F;
4139         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4140         vfta &= ~(1 << (vid & 0x1F));
4141         e1000_write_vfta(&adapter->hw, index, vfta);
4142 }
4143
4144 static void
4145 e1000_restore_vlan(struct e1000_adapter *adapter)
4146 {
4147         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4148
4149         if(adapter->vlgrp) {
4150                 uint16_t vid;
4151                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4152                         if(!adapter->vlgrp->vlan_devices[vid])
4153                                 continue;
4154                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4155                 }
4156         }
4157 }
4158
4159 int
4160 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4161 {
4162         adapter->hw.autoneg = 0;
4163
4164         /* Fiber NICs only allow 1000 gbps Full duplex */
4165         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4166                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4167                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4168                 return -EINVAL;
4169         }
4170
4171         switch(spddplx) {
4172         case SPEED_10 + DUPLEX_HALF:
4173                 adapter->hw.forced_speed_duplex = e1000_10_half;
4174                 break;
4175         case SPEED_10 + DUPLEX_FULL:
4176                 adapter->hw.forced_speed_duplex = e1000_10_full;
4177                 break;
4178         case SPEED_100 + DUPLEX_HALF:
4179                 adapter->hw.forced_speed_duplex = e1000_100_half;
4180                 break;
4181         case SPEED_100 + DUPLEX_FULL:
4182                 adapter->hw.forced_speed_duplex = e1000_100_full;
4183                 break;
4184         case SPEED_1000 + DUPLEX_FULL:
4185                 adapter->hw.autoneg = 1;
4186                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4187                 break;
4188         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4189         default:
4190                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4191                 return -EINVAL;
4192         }
4193         return 0;
4194 }
4195
4196 static int
4197 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4198 {
4199         struct net_device *netdev = pci_get_drvdata(pdev);
4200         struct e1000_adapter *adapter = netdev_priv(netdev);
4201         uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
4202         uint32_t wufc = adapter->wol;
4203
4204         netif_device_detach(netdev);
4205
4206         if(netif_running(netdev))
4207                 e1000_down(adapter);
4208
4209         status = E1000_READ_REG(&adapter->hw, STATUS);
4210         if(status & E1000_STATUS_LU)
4211                 wufc &= ~E1000_WUFC_LNKC;
4212
4213         if(wufc) {
4214                 e1000_setup_rctl(adapter);
4215                 e1000_set_multi(netdev);
4216
4217                 /* turn on all-multi mode if wake on multicast is enabled */
4218                 if(adapter->wol & E1000_WUFC_MC) {
4219                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4220                         rctl |= E1000_RCTL_MPE;
4221                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4222                 }
4223
4224                 if(adapter->hw.mac_type >= e1000_82540) {
4225                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4226                         /* advertise wake from D3Cold */
4227                         #define E1000_CTRL_ADVD3WUC 0x00100000
4228                         /* phy power management enable */
4229                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4230                         ctrl |= E1000_CTRL_ADVD3WUC |
4231                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4232                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4233                 }
4234
4235                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4236                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4237                         /* keep the laser running in D3 */
4238                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4239                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4240                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4241                 }
4242
4243                 /* Allow time for pending master requests to run */
4244                 e1000_disable_pciex_master(&adapter->hw);
4245
4246                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4247                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4248                 pci_enable_wake(pdev, 3, 1);
4249                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4250         } else {
4251                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4252                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4253                 pci_enable_wake(pdev, 3, 0);
4254                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4255         }
4256
4257         pci_save_state(pdev);
4258
4259         if(adapter->hw.mac_type >= e1000_82540 &&
4260            adapter->hw.media_type == e1000_media_type_copper) {
4261                 manc = E1000_READ_REG(&adapter->hw, MANC);
4262                 if(manc & E1000_MANC_SMBUS_EN) {
4263                         manc |= E1000_MANC_ARP_EN;
4264                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4265                         pci_enable_wake(pdev, 3, 1);
4266                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4267                 }
4268         }
4269
4270         switch(adapter->hw.mac_type) {
4271         case e1000_82571:
4272         case e1000_82572:
4273                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4274                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4275                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
4276                 break;
4277         case e1000_82573:
4278                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4279                 E1000_WRITE_REG(&adapter->hw, SWSM,
4280                                 swsm & ~E1000_SWSM_DRV_LOAD);
4281                 break;
4282         default:
4283                 break;
4284         }
4285
4286         pci_disable_device(pdev);
4287         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4288
4289         return 0;
4290 }
4291
4292 #ifdef CONFIG_PM
4293 static int
4294 e1000_resume(struct pci_dev *pdev)
4295 {
4296         struct net_device *netdev = pci_get_drvdata(pdev);
4297         struct e1000_adapter *adapter = netdev_priv(netdev);
4298         uint32_t manc, ret_val, swsm;
4299         uint32_t ctrl_ext;
4300
4301         pci_set_power_state(pdev, PCI_D0);
4302         pci_restore_state(pdev);
4303         ret_val = pci_enable_device(pdev);
4304         pci_set_master(pdev);
4305
4306         pci_enable_wake(pdev, PCI_D3hot, 0);
4307         pci_enable_wake(pdev, PCI_D3cold, 0);
4308
4309         e1000_reset(adapter);
4310         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4311
4312         if(netif_running(netdev))
4313                 e1000_up(adapter);
4314
4315         netif_device_attach(netdev);
4316
4317         if(adapter->hw.mac_type >= e1000_82540 &&
4318            adapter->hw.media_type == e1000_media_type_copper) {
4319                 manc = E1000_READ_REG(&adapter->hw, MANC);
4320                 manc &= ~(E1000_MANC_ARP_EN);
4321                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4322         }
4323
4324         switch(adapter->hw.mac_type) {
4325         case e1000_82571:
4326         case e1000_82572:
4327                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4328                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4329                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
4330                 break;
4331         case e1000_82573:
4332                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4333                 E1000_WRITE_REG(&adapter->hw, SWSM,
4334                                 swsm | E1000_SWSM_DRV_LOAD);
4335                 break;
4336         default:
4337                 break;
4338         }
4339
4340         return 0;
4341 }
4342 #endif
4343 #ifdef CONFIG_NET_POLL_CONTROLLER
4344 /*
4345  * Polling 'interrupt' - used by things like netconsole to send skbs
4346  * without having to re-enable interrupts. It's not called while
4347  * the interrupt routine is executing.
4348  */
4349 static void
4350 e1000_netpoll(struct net_device *netdev)
4351 {
4352         struct e1000_adapter *adapter = netdev_priv(netdev);
4353         disable_irq(adapter->pdev->irq);
4354         e1000_intr(adapter->pdev->irq, netdev, NULL);
4355         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4356         enable_irq(adapter->pdev->irq);
4357 }
4358 #endif
4359
4360 /* e1000_main.c */