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 static 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 "6.3.9-k2"DRIVERNAPI
  47 char e1000_driver_version[] = DRV_VERSION;
  48 static 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 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 116                                     struct e1000_tx_ring *txdr);
 117 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 118                                     struct e1000_rx_ring *rxdr);
 119 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 120                                     struct e1000_tx_ring *tx_ring);
 121 static 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 #ifdef CONFIG_PM
 195 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 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
 300 static void
 301 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 302 {
 303         struct net_device *netdev = adapter->netdev;
 304         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 305         uint16_t old_vid = adapter->mng_vlan_id;
 306         if(adapter->vlgrp) {
 307                 if(!adapter->vlgrp->vlan_devices[vid]) {
 308                         if(adapter->hw.mng_cookie.status &
 309                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 310                                 e1000_vlan_rx_add_vid(netdev, vid);
 311                                 adapter->mng_vlan_id = vid;
 312                         } else
 313                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 314
 315                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 316                                         (vid != old_vid) &&
 317                                         !adapter->vlgrp->vlan_devices[old_vid])
 318                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 319                 }
 320         }
 321 }
 322
 323 int
 324 e1000_up(struct e1000_adapter *adapter)
 325 {
 326         struct net_device *netdev = adapter->netdev;
 327         int i, err;
 328
 329         /* hardware has been reset, we need to reload some things */
 330
 331         /* Reset the PHY if it was previously powered down */
 332         if(adapter->hw.media_type == e1000_media_type_copper) {
 333                 uint16_t mii_reg;
 334                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 335                 if(mii_reg & MII_CR_POWER_DOWN)
 336                         e1000_phy_reset(&adapter->hw);
 337         }
 338
 339         e1000_set_multi(netdev);
 340
 341         e1000_restore_vlan(adapter);
 342
 343         e1000_configure_tx(adapter);
 344         e1000_setup_rctl(adapter);
 345         e1000_configure_rx(adapter);
 346         for (i = 0; i < adapter->num_queues; i++)
 347                 adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]);
 348
 349 #ifdef CONFIG_PCI_MSI
 350         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 351                 adapter->have_msi = TRUE;
 352                 if((err = pci_enable_msi(adapter->pdev))) {
 353                         DPRINTK(PROBE, ERR,
 354                          "Unable to allocate MSI interrupt Error: %d\n", err);
 355                         adapter->have_msi = FALSE;
 356                 }
 357         }
 358 #endif
 359         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 360                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 361                               netdev->name, netdev))) {
 362                 DPRINTK(PROBE, ERR,
 363                     "Unable to allocate interrupt Error: %d\n", err);
 364                 return err;
 365         }
 366
 367         mod_timer(&adapter->watchdog_timer, jiffies);
 368
 369 #ifdef CONFIG_E1000_NAPI
 370         netif_poll_enable(netdev);
 371 #endif
 372         e1000_irq_enable(adapter);
 373
 374         return 0;
 375 }
 376
 377 void
 378 e1000_down(struct e1000_adapter *adapter)
 379 {
 380         struct net_device *netdev = adapter->netdev;
 381
 382         e1000_irq_disable(adapter);
 383 #ifdef CONFIG_E1000_MQ
 384         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 385 #endif
 386         free_irq(adapter->pdev->irq, netdev);
 387 #ifdef CONFIG_PCI_MSI
 388         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 389            adapter->have_msi == TRUE)
 390                 pci_disable_msi(adapter->pdev);
 391 #endif
 392         del_timer_sync(&adapter->tx_fifo_stall_timer);
 393         del_timer_sync(&adapter->watchdog_timer);
 394         del_timer_sync(&adapter->phy_info_timer);
 395
 396 #ifdef CONFIG_E1000_NAPI
 397         netif_poll_disable(netdev);
 398 #endif
 399         adapter->link_speed = 0;
 400         adapter->link_duplex = 0;
 401         netif_carrier_off(netdev);
 402         netif_stop_queue(netdev);
 403
 404         e1000_reset(adapter);
 405         e1000_clean_all_tx_rings(adapter);
 406         e1000_clean_all_rx_rings(adapter);
 407
 408         /* If WoL is not enabled and management mode is not IAMT
 409          * Power down the PHY so no link is implied when interface is down */
 410         if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 411            adapter->hw.media_type == e1000_media_type_copper &&
 412            !e1000_check_mng_mode(&adapter->hw) &&
 413            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
 414                 uint16_t mii_reg;
 415                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 416                 mii_reg |= MII_CR_POWER_DOWN;
 417                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 418                 mdelay(1);
 419         }
 420 }
 421
 422 void
 423 e1000_reset(struct e1000_adapter *adapter)
 424 {
 425         struct net_device *netdev = adapter->netdev;
 426         uint32_t pba, manc;
 427         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 428         uint16_t fc_low_water_mark = E1000_FC_LOW_DIFF;
 429
 430         /* Repartition Pba for greater than 9k mtu
 431          * To take effect CTRL.RST is required.
 432          */
 433
 434         switch (adapter->hw.mac_type) {
 435         case e1000_82547:
 436         case e1000_82547_rev_2:
 437                 pba = E1000_PBA_30K;
 438                 break;
 439         case e1000_82571:
 440         case e1000_82572:
 441                 pba = E1000_PBA_38K;
 442                 break;
 443         case e1000_82573:
 444                 pba = E1000_PBA_12K;
 445                 break;
 446         default:
 447                 pba = E1000_PBA_48K;
 448                 break;
 449         }
 450
 451         if((adapter->hw.mac_type != e1000_82573) &&
 452            (adapter->netdev->mtu > E1000_RXBUFFER_8192)) {
 453                 pba -= 8; /* allocate more FIFO for Tx */
 454                 /* send an XOFF when there is enough space in the
 455                  * Rx FIFO to hold one extra full size Rx packet
 456                 */
 457                 fc_high_water_mark = netdev->mtu + ENET_HEADER_SIZE +
 458                                         ETHERNET_FCS_SIZE + 1;
 459                 fc_low_water_mark = fc_high_water_mark + 8;
 460         }
 461
 462
 463         if(adapter->hw.mac_type == e1000_82547) {
 464                 adapter->tx_fifo_head = 0;
 465                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 466                 adapter->tx_fifo_size =
 467                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 468                 atomic_set(&adapter->tx_fifo_stall, 0);
 469         }
 470
 471         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 472
 473         /* flow control settings */
 474         adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
 475                                     fc_high_water_mark;
 476         adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
 477                                    fc_low_water_mark;
 478         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 479         adapter->hw.fc_send_xon = 1;
 480         adapter->hw.fc = adapter->hw.original_fc;
 481
 482         /* Allow time for pending master requests to run */
 483         e1000_reset_hw(&adapter->hw);
 484         if(adapter->hw.mac_type >= e1000_82544)
 485                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 486         if(e1000_init_hw(&adapter->hw))
 487                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 488         e1000_update_mng_vlan(adapter);
 489         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 490         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 491
 492         e1000_reset_adaptive(&adapter->hw);
 493         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 494         if (adapter->en_mng_pt) {
 495                 manc = E1000_READ_REG(&adapter->hw, MANC);
 496                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 497                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 498         }
 499 }
 500
 501 /**
 502  * e1000_probe - Device Initialization Routine
 503  * @pdev: PCI device information struct
 504  * @ent: entry in e1000_pci_tbl
 505  *
 506  * Returns 0 on success, negative on failure
 507  *
 508  * e1000_probe initializes an adapter identified by a pci_dev structure.
 509  * The OS initialization, configuring of the adapter private structure,
 510  * and a hardware reset occur.
 511  **/
 512
 513 static int __devinit
 514 e1000_probe(struct pci_dev *pdev,
 515             const struct pci_device_id *ent)
 516 {
 517         struct net_device *netdev;
 518         struct e1000_adapter *adapter;
 519         unsigned long mmio_start, mmio_len;
 520         uint32_t ctrl_ext;
 521         uint32_t swsm;
 522
 523         static int cards_found = 0;
 524         int i, err, pci_using_dac;
 525         uint16_t eeprom_data;
 526         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 527         if((err = pci_enable_device(pdev)))
 528                 return err;
 529
 530         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 531                 pci_using_dac = 1;
 532         } else {
 533                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 534                         E1000_ERR("No usable DMA configuration, aborting\n");
 535                         return err;
 536                 }
 537                 pci_using_dac = 0;
 538         }
 539
 540         if((err = pci_request_regions(pdev, e1000_driver_name)))
 541                 return err;
 542
 543         pci_set_master(pdev);
 544
 545         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 546         if(!netdev) {
 547                 err = -ENOMEM;
 548                 goto err_alloc_etherdev;
 549         }
 550
 551         SET_MODULE_OWNER(netdev);
 552         SET_NETDEV_DEV(netdev, &pdev->dev);
 553
 554         pci_set_drvdata(pdev, netdev);
 555         adapter = netdev_priv(netdev);
 556         adapter->netdev = netdev;
 557         adapter->pdev = pdev;
 558         adapter->hw.back = adapter;
 559         adapter->msg_enable = (1 << debug) - 1;
 560
 561         mmio_start = pci_resource_start(pdev, BAR_0);
 562         mmio_len = pci_resource_len(pdev, BAR_0);
 563
 564         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 565         if(!adapter->hw.hw_addr) {
 566                 err = -EIO;
 567                 goto err_ioremap;
 568         }
 569
 570         for(i = BAR_1; i <= BAR_5; i++) {
 571                 if(pci_resource_len(pdev, i) == 0)
 572                         continue;
 573                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 574                         adapter->hw.io_base = pci_resource_start(pdev, i);
 575                         break;
 576                 }
 577         }
 578
 579         netdev->open = &e1000_open;
 580         netdev->stop = &e1000_close;
 581         netdev->hard_start_xmit = &e1000_xmit_frame;
 582         netdev->get_stats = &e1000_get_stats;
 583         netdev->set_multicast_list = &e1000_set_multi;
 584         netdev->set_mac_address = &e1000_set_mac;
 585         netdev->change_mtu = &e1000_change_mtu;
 586         netdev->do_ioctl = &e1000_ioctl;
 587         e1000_set_ethtool_ops(netdev);
 588         netdev->tx_timeout = &e1000_tx_timeout;
 589         netdev->watchdog_timeo = 5 * HZ;
 590 #ifdef CONFIG_E1000_NAPI
 591         netdev->poll = &e1000_clean;
 592         netdev->weight = 64;
 593 #endif
 594         netdev->vlan_rx_register = e1000_vlan_rx_register;
 595         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 596         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 597 #ifdef CONFIG_NET_POLL_CONTROLLER
 598         netdev->poll_controller = e1000_netpoll;
 599 #endif
 600         strcpy(netdev->name, pci_name(pdev));
 601
 602         netdev->mem_start = mmio_start;
 603         netdev->mem_end = mmio_start + mmio_len;
 604         netdev->base_addr = adapter->hw.io_base;
 605
 606         adapter->bd_number = cards_found;
 607
 608         /* setup the private structure */
 609
 610         if((err = e1000_sw_init(adapter)))
 611                 goto err_sw_init;
 612
 613         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 614                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 615
 616         if(adapter->hw.mac_type >= e1000_82543) {
 617                 netdev->features = NETIF_F_SG |
 618                                    NETIF_F_HW_CSUM |
 619                                    NETIF_F_HW_VLAN_TX |
 620                                    NETIF_F_HW_VLAN_RX |
 621                                    NETIF_F_HW_VLAN_FILTER;
 622         }
 623
 624 #ifdef NETIF_F_TSO
 625         if((adapter->hw.mac_type >= e1000_82544) &&
 626            (adapter->hw.mac_type != e1000_82547))
 627                 netdev->features |= NETIF_F_TSO;
 628
 629 #ifdef NETIF_F_TSO_IPV6
 630         if(adapter->hw.mac_type > e1000_82547_rev_2)
 631                 netdev->features |= NETIF_F_TSO_IPV6;
 632 #endif
 633 #endif
 634         if(pci_using_dac)
 635                 netdev->features |= NETIF_F_HIGHDMA;
 636
 637         /* hard_start_xmit is safe against parallel locking */
 638         netdev->features |= NETIF_F_LLTX;
 639
 640         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 641
 642         /* before reading the EEPROM, reset the controller to
 643          * put the device in a known good starting state */
 644
 645         e1000_reset_hw(&adapter->hw);
 646
 647         /* make sure the EEPROM is good */
 648
 649         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 650                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 651                 err = -EIO;
 652                 goto err_eeprom;
 653         }
 654
 655         /* copy the MAC address out of the EEPROM */
 656
 657         if(e1000_read_mac_addr(&adapter->hw))
 658                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 659         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 660         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 661
 662         if(!is_valid_ether_addr(netdev->perm_addr)) {
 663                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 664                 err = -EIO;
 665                 goto err_eeprom;
 666         }
 667
 668         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 669
 670         e1000_get_bus_info(&adapter->hw);
 671
 672         init_timer(&adapter->tx_fifo_stall_timer);
 673         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 674         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 675
 676         init_timer(&adapter->watchdog_timer);
 677         adapter->watchdog_timer.function = &e1000_watchdog;
 678         adapter->watchdog_timer.data = (unsigned long) adapter;
 679
 680         INIT_WORK(&adapter->watchdog_task,
 681                 (void (*)(void *))e1000_watchdog_task, adapter);
 682
 683         init_timer(&adapter->phy_info_timer);
 684         adapter->phy_info_timer.function = &e1000_update_phy_info;
 685         adapter->phy_info_timer.data = (unsigned long) adapter;
 686
 687         INIT_WORK(&adapter->tx_timeout_task,
 688                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 689
 690         /* we're going to reset, so assume we have no link for now */
 691
 692         netif_carrier_off(netdev);
 693         netif_stop_queue(netdev);
 694
 695         e1000_check_options(adapter);
 696
 697         /* Initial Wake on LAN setting
 698          * If APM wake is enabled in the EEPROM,
 699          * enable the ACPI Magic Packet filter
 700          */
 701
 702         switch(adapter->hw.mac_type) {
 703         case e1000_82542_rev2_0:
 704         case e1000_82542_rev2_1:
 705         case e1000_82543:
 706                 break;
 707         case e1000_82544:
 708                 e1000_read_eeprom(&adapter->hw,
 709                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 710                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 711                 break;
 712         case e1000_82546:
 713         case e1000_82546_rev_3:
 714         case e1000_82571:
 715                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 716                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 717                         e1000_read_eeprom(&adapter->hw,
 718                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 719                         break;
 720                 }
 721                 /* Fall Through */
 722         default:
 723                 e1000_read_eeprom(&adapter->hw,
 724                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 725                 break;
 726         }
 727         if(eeprom_data & eeprom_apme_mask)
 728                 adapter->wol |= E1000_WUFC_MAG;
 729
 730         /* reset the hardware with the new settings */
 731         e1000_reset(adapter);
 732
 733         /* Let firmware know the driver has taken over */
 734         switch(adapter->hw.mac_type) {
 735         case e1000_82571:
 736         case e1000_82572:
 737                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 738                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 739                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 740                 break;
 741         case e1000_82573:
 742                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 743                 E1000_WRITE_REG(&adapter->hw, SWSM,
 744                                 swsm | E1000_SWSM_DRV_LOAD);
 745                 break;
 746         default:
 747                 break;
 748         }
 749
 750         strcpy(netdev->name, "eth%d");
 751         if((err = register_netdev(netdev)))
 752                 goto err_register;
 753
 754         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 755
 756         cards_found++;
 757         return 0;
 758
 759 err_register:
 760 err_sw_init:
 761 err_eeprom:
 762         iounmap(adapter->hw.hw_addr);
 763 err_ioremap:
 764         free_netdev(netdev);
 765 err_alloc_etherdev:
 766         pci_release_regions(pdev);
 767         return err;
 768 }
 769
 770 /**
 771  * e1000_remove - Device Removal Routine
 772  * @pdev: PCI device information struct
 773  *
 774  * e1000_remove is called by the PCI subsystem to alert the driver
 775  * that it should release a PCI device.  The could be caused by a
 776  * Hot-Plug event, or because the driver is going to be removed from
 777  * memory.
 778  **/
 779
 780 static void __devexit
 781 e1000_remove(struct pci_dev *pdev)
 782 {
 783         struct net_device *netdev = pci_get_drvdata(pdev);
 784         struct e1000_adapter *adapter = netdev_priv(netdev);
 785         uint32_t ctrl_ext;
 786         uint32_t manc, swsm;
 787 #ifdef CONFIG_E1000_NAPI
 788         int i;
 789 #endif
 790
 791         flush_scheduled_work();
 792
 793         if(adapter->hw.mac_type >= e1000_82540 &&
 794            adapter->hw.media_type == e1000_media_type_copper) {
 795                 manc = E1000_READ_REG(&adapter->hw, MANC);
 796                 if(manc & E1000_MANC_SMBUS_EN) {
 797                         manc |= E1000_MANC_ARP_EN;
 798                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 799                 }
 800         }
 801
 802         switch(adapter->hw.mac_type) {
 803         case e1000_82571:
 804         case e1000_82572:
 805                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 806                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 807                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 808                 break;
 809         case e1000_82573:
 810                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 811                 E1000_WRITE_REG(&adapter->hw, SWSM,
 812                                 swsm & ~E1000_SWSM_DRV_LOAD);
 813                 break;
 814
 815         default:
 816                 break;
 817         }
 818
 819         unregister_netdev(netdev);
 820 #ifdef CONFIG_E1000_NAPI
 821         for (i = 0; i < adapter->num_queues; i++)
 822                 __dev_put(&adapter->polling_netdev[i]);
 823 #endif
 824
 825         if(!e1000_check_phy_reset_block(&adapter->hw))
 826                 e1000_phy_hw_reset(&adapter->hw);
 827
 828         kfree(adapter->tx_ring);
 829         kfree(adapter->rx_ring);
 830 #ifdef CONFIG_E1000_NAPI
 831         kfree(adapter->polling_netdev);
 832 #endif
 833
 834         iounmap(adapter->hw.hw_addr);
 835         pci_release_regions(pdev);
 836
 837 #ifdef CONFIG_E1000_MQ
 838         free_percpu(adapter->cpu_netdev);
 839         free_percpu(adapter->cpu_tx_ring);
 840 #endif
 841         free_netdev(netdev);
 842
 843         pci_disable_device(pdev);
 844 }
 845
 846 /**
 847  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 848  * @adapter: board private structure to initialize
 849  *
 850  * e1000_sw_init initializes the Adapter private data structure.
 851  * Fields are initialized based on PCI device information and
 852  * OS network device settings (MTU size).
 853  **/
 854
 855 static int __devinit
 856 e1000_sw_init(struct e1000_adapter *adapter)
 857 {
 858         struct e1000_hw *hw = &adapter->hw;
 859         struct net_device *netdev = adapter->netdev;
 860         struct pci_dev *pdev = adapter->pdev;
 861 #ifdef CONFIG_E1000_NAPI
 862         int i;
 863 #endif
 864
 865         /* PCI config space info */
 866
 867         hw->vendor_id = pdev->vendor;
 868         hw->device_id = pdev->device;
 869         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 870         hw->subsystem_id = pdev->subsystem_device;
 871
 872         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 873
 874         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 875
 876         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 877         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 878         hw->max_frame_size = netdev->mtu +
 879                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 880         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 881
 882         /* identify the MAC */
 883
 884         if(e1000_set_mac_type(hw)) {
 885                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 886                 return -EIO;
 887         }
 888
 889         /* initialize eeprom parameters */
 890
 891         if(e1000_init_eeprom_params(hw)) {
 892                 E1000_ERR("EEPROM initialization failed\n");
 893                 return -EIO;
 894         }
 895
 896         switch(hw->mac_type) {
 897         default:
 898                 break;
 899         case e1000_82541:
 900         case e1000_82547:
 901         case e1000_82541_rev_2:
 902         case e1000_82547_rev_2:
 903                 hw->phy_init_script = 1;
 904                 break;
 905         }
 906
 907         e1000_set_media_type(hw);
 908
 909         hw->wait_autoneg_complete = FALSE;
 910         hw->tbi_compatibility_en = TRUE;
 911         hw->adaptive_ifs = TRUE;
 912
 913         /* Copper options */
 914
 915         if(hw->media_type == e1000_media_type_copper) {
 916                 hw->mdix = AUTO_ALL_MODES;
 917                 hw->disable_polarity_correction = FALSE;
 918                 hw->master_slave = E1000_MASTER_SLAVE;
 919         }
 920
 921 #ifdef CONFIG_E1000_MQ
 922         /* Number of supported queues */
 923         switch (hw->mac_type) {
 924         case e1000_82571:
 925         case e1000_82572:
 926                 adapter->num_queues = 2;
 927                 break;
 928         default:
 929                 adapter->num_queues = 1;
 930                 break;
 931         }
 932         adapter->num_queues = min(adapter->num_queues, num_online_cpus());
 933 #else
 934         adapter->num_queues = 1;
 935 #endif
 936
 937         if (e1000_alloc_queues(adapter)) {
 938                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
 939                 return -ENOMEM;
 940         }
 941
 942 #ifdef CONFIG_E1000_NAPI
 943         for (i = 0; i < adapter->num_queues; i++) {
 944                 adapter->polling_netdev[i].priv = adapter;
 945                 adapter->polling_netdev[i].poll = &e1000_clean;
 946                 adapter->polling_netdev[i].weight = 64;
 947                 dev_hold(&adapter->polling_netdev[i]);
 948                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
 949         }
 950 #endif
 951
 952 #ifdef CONFIG_E1000_MQ
 953         e1000_setup_queue_mapping(adapter);
 954 #endif
 955
 956         atomic_set(&adapter->irq_sem, 1);
 957         spin_lock_init(&adapter->stats_lock);
 958
 959         return 0;
 960 }
 961
 962 /**
 963  * e1000_alloc_queues - Allocate memory for all rings
 964  * @adapter: board private structure to initialize
 965  *
 966  * We allocate one ring per queue at run-time since we don't know the
 967  * number of queues at compile-time.  The polling_netdev array is
 968  * intended for Multiqueue, but should work fine with a single queue.
 969  **/
 970
 971 static int __devinit
 972 e1000_alloc_queues(struct e1000_adapter *adapter)
 973 {
 974         int size;
 975
 976         size = sizeof(struct e1000_tx_ring) * adapter->num_queues;
 977         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
 978         if (!adapter->tx_ring)
 979                 return -ENOMEM;
 980         memset(adapter->tx_ring, 0, size);
 981
 982         size = sizeof(struct e1000_rx_ring) * adapter->num_queues;
 983         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
 984         if (!adapter->rx_ring) {
 985                 kfree(adapter->tx_ring);
 986                 return -ENOMEM;
 987         }
 988         memset(adapter->rx_ring, 0, size);
 989
 990 #ifdef CONFIG_E1000_NAPI
 991         size = sizeof(struct net_device) * adapter->num_queues;
 992         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
 993         if (!adapter->polling_netdev) {
 994                 kfree(adapter->tx_ring);
 995                 kfree(adapter->rx_ring);
 996                 return -ENOMEM;
 997         }
 998         memset(adapter->polling_netdev, 0, size);
 999 #endif
1000
1001         return E1000_SUCCESS;
1002 }
1003
1004 #ifdef CONFIG_E1000_MQ
1005 static void __devinit
1006 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1007 {
1008         int i, cpu;
1009
1010         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1011         adapter->rx_sched_call_data.info = adapter->netdev;
1012         cpus_clear(adapter->rx_sched_call_data.cpumask);
1013
1014         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1015         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1016
1017         lock_cpu_hotplug();
1018         i = 0;
1019         for_each_online_cpu(cpu) {
1020                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_queues];
1021                 /* This is incomplete because we'd like to assign separate
1022                  * physical cpus to these netdev polling structures and
1023                  * avoid saturating a subset of cpus.
1024                  */
1025                 if (i < adapter->num_queues) {
1026                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1027                         adapter->cpu_for_queue[i] = cpu;
1028                 } else
1029                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1030
1031                 i++;
1032         }
1033         unlock_cpu_hotplug();
1034 }
1035 #endif
1036
1037 /**
1038  * e1000_open - Called when a network interface is made active
1039  * @netdev: network interface device structure
1040  *
1041  * Returns 0 on success, negative value on failure
1042  *
1043  * The open entry point is called when a network interface is made
1044  * active by the system (IFF_UP).  At this point all resources needed
1045  * for transmit and receive operations are allocated, the interrupt
1046  * handler is registered with the OS, the watchdog timer is started,
1047  * and the stack is notified that the interface is ready.
1048  **/
1049
1050 static int
1051 e1000_open(struct net_device *netdev)
1052 {
1053         struct e1000_adapter *adapter = netdev_priv(netdev);
1054         int err;
1055
1056         /* allocate transmit descriptors */
1057
1058         if ((err = e1000_setup_all_tx_resources(adapter)))
1059                 goto err_setup_tx;
1060
1061         /* allocate receive descriptors */
1062
1063         if ((err = e1000_setup_all_rx_resources(adapter)))
1064                 goto err_setup_rx;
1065
1066         if((err = e1000_up(adapter)))
1067                 goto err_up;
1068         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1069         if((adapter->hw.mng_cookie.status &
1070                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1071                 e1000_update_mng_vlan(adapter);
1072         }
1073
1074         return E1000_SUCCESS;
1075
1076 err_up:
1077         e1000_free_all_rx_resources(adapter);
1078 err_setup_rx:
1079         e1000_free_all_tx_resources(adapter);
1080 err_setup_tx:
1081         e1000_reset(adapter);
1082
1083         return err;
1084 }
1085
1086 /**
1087  * e1000_close - Disables a network interface
1088  * @netdev: network interface device structure
1089  *
1090  * Returns 0, this is not allowed to fail
1091  *
1092  * The close entry point is called when an interface is de-activated
1093  * by the OS.  The hardware is still under the drivers control, but
1094  * needs to be disabled.  A global MAC reset is issued to stop the
1095  * hardware, and all transmit and receive resources are freed.
1096  **/
1097
1098 static int
1099 e1000_close(struct net_device *netdev)
1100 {
1101         struct e1000_adapter *adapter = netdev_priv(netdev);
1102
1103         e1000_down(adapter);
1104
1105         e1000_free_all_tx_resources(adapter);
1106         e1000_free_all_rx_resources(adapter);
1107
1108         if((adapter->hw.mng_cookie.status &
1109                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1110                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1111         }
1112         return 0;
1113 }
1114
1115 /**
1116  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1117  * @adapter: address of board private structure
1118  * @start: address of beginning of memory
1119  * @len: length of memory
1120  **/
1121 static inline boolean_t
1122 e1000_check_64k_bound(struct e1000_adapter *adapter,
1123                       void *start, unsigned long len)
1124 {
1125         unsigned long begin = (unsigned long) start;
1126         unsigned long end = begin + len;
1127
1128         /* First rev 82545 and 82546 need to not allow any memory
1129          * write location to cross 64k boundary due to errata 23 */
1130         if (adapter->hw.mac_type == e1000_82545 ||
1131             adapter->hw.mac_type == e1000_82546) {
1132                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1133         }
1134
1135         return TRUE;
1136 }
1137
1138 /**
1139  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1140  * @adapter: board private structure
1141  * @txdr:    tx descriptor ring (for a specific queue) to setup
1142  *
1143  * Return 0 on success, negative on failure
1144  **/
1145
1146 static int
1147 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1148                          struct e1000_tx_ring *txdr)
1149 {
1150         struct pci_dev *pdev = adapter->pdev;
1151         int size;
1152
1153         size = sizeof(struct e1000_buffer) * txdr->count;
1154
1155         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1156         if(!txdr->buffer_info) {
1157                 DPRINTK(PROBE, ERR,
1158                 "Unable to allocate memory for the transmit descriptor ring\n");
1159                 return -ENOMEM;
1160         }
1161         memset(txdr->buffer_info, 0, size);
1162
1163         /* round up to nearest 4K */
1164
1165         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1166         E1000_ROUNDUP(txdr->size, 4096);
1167
1168         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1169         if(!txdr->desc) {
1170 setup_tx_desc_die:
1171                 vfree(txdr->buffer_info);
1172                 DPRINTK(PROBE, ERR,
1173                 "Unable to allocate memory for the transmit descriptor ring\n");
1174                 return -ENOMEM;
1175         }
1176
1177         /* Fix for errata 23, can't cross 64kB boundary */
1178         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1179                 void *olddesc = txdr->desc;
1180                 dma_addr_t olddma = txdr->dma;
1181                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1182                                      "at %p\n", txdr->size, txdr->desc);
1183                 /* Try again, without freeing the previous */
1184                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1185                 if(!txdr->desc) {
1186                 /* Failed allocation, critical failure */
1187                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1188                         goto setup_tx_desc_die;
1189                 }
1190
1191                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1192                         /* give up */
1193                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1194                                             txdr->dma);
1195                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1196                         DPRINTK(PROBE, ERR,
1197                                 "Unable to allocate aligned memory "
1198                                 "for the transmit descriptor ring\n");
1199                         vfree(txdr->buffer_info);
1200                         return -ENOMEM;
1201                 } else {
1202                         /* Free old allocation, new allocation was successful */
1203                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1204                 }
1205         }
1206         memset(txdr->desc, 0, txdr->size);
1207
1208         txdr->next_to_use = 0;
1209         txdr->next_to_clean = 0;
1210         spin_lock_init(&txdr->tx_lock);
1211
1212         return 0;
1213 }
1214
1215 /**
1216  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1217  *                                (Descriptors) for all queues
1218  * @adapter: board private structure
1219  *
1220  * If this function returns with an error, then it's possible one or
1221  * more of the rings is populated (while the rest are not).  It is the
1222  * callers duty to clean those orphaned rings.
1223  *
1224  * Return 0 on success, negative on failure
1225  **/
1226
1227 int
1228 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1229 {
1230         int i, err = 0;
1231
1232         for (i = 0; i < adapter->num_queues; i++) {
1233                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1234                 if (err) {
1235                         DPRINTK(PROBE, ERR,
1236                                 "Allocation for Tx Queue %u failed\n", i);
1237                         break;
1238                 }
1239         }
1240
1241         return err;
1242 }
1243
1244 /**
1245  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1246  * @adapter: board private structure
1247  *
1248  * Configure the Tx unit of the MAC after a reset.
1249  **/
1250
1251 static void
1252 e1000_configure_tx(struct e1000_adapter *adapter)
1253 {
1254         uint64_t tdba;
1255         struct e1000_hw *hw = &adapter->hw;
1256         uint32_t tdlen, tctl, tipg, tarc;
1257
1258         /* Setup the HW Tx Head and Tail descriptor pointers */
1259
1260         switch (adapter->num_queues) {
1261         case 2:
1262                 tdba = adapter->tx_ring[1].dma;
1263                 tdlen = adapter->tx_ring[1].count *
1264                         sizeof(struct e1000_tx_desc);
1265                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1266                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1267                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1268                 E1000_WRITE_REG(hw, TDH1, 0);
1269                 E1000_WRITE_REG(hw, TDT1, 0);
1270                 adapter->tx_ring[1].tdh = E1000_TDH1;
1271                 adapter->tx_ring[1].tdt = E1000_TDT1;
1272                 /* Fall Through */
1273         case 1:
1274         default:
1275                 tdba = adapter->tx_ring[0].dma;
1276                 tdlen = adapter->tx_ring[0].count *
1277                         sizeof(struct e1000_tx_desc);
1278                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1279                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1280                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1281                 E1000_WRITE_REG(hw, TDH, 0);
1282                 E1000_WRITE_REG(hw, TDT, 0);
1283                 adapter->tx_ring[0].tdh = E1000_TDH;
1284                 adapter->tx_ring[0].tdt = E1000_TDT;
1285                 break;
1286         }
1287
1288         /* Set the default values for the Tx Inter Packet Gap timer */
1289
1290         switch (hw->mac_type) {
1291         case e1000_82542_rev2_0:
1292         case e1000_82542_rev2_1:
1293                 tipg = DEFAULT_82542_TIPG_IPGT;
1294                 tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1295                 tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1296                 break;
1297         default:
1298                 if (hw->media_type == e1000_media_type_fiber ||
1299                     hw->media_type == e1000_media_type_internal_serdes)
1300                         tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1301                 else
1302                         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1303                 tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
1304                 tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
1305         }
1306         E1000_WRITE_REG(hw, TIPG, tipg);
1307
1308         /* Set the Tx Interrupt Delay register */
1309
1310         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1311         if (hw->mac_type >= e1000_82540)
1312                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1313
1314         /* Program the Transmit Control Register */
1315
1316         tctl = E1000_READ_REG(hw, TCTL);
1317
1318         tctl &= ~E1000_TCTL_CT;
1319         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1320                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1321
1322         E1000_WRITE_REG(hw, TCTL, tctl);
1323
1324         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1325                 tarc = E1000_READ_REG(hw, TARC0);
1326                 tarc |= ((1 << 25) | (1 << 21));
1327                 E1000_WRITE_REG(hw, TARC0, tarc);
1328                 tarc = E1000_READ_REG(hw, TARC1);
1329                 tarc |= (1 << 25);
1330                 if (tctl & E1000_TCTL_MULR)
1331                         tarc &= ~(1 << 28);
1332                 else
1333                         tarc |= (1 << 28);
1334                 E1000_WRITE_REG(hw, TARC1, tarc);
1335         }
1336
1337         e1000_config_collision_dist(hw);
1338
1339         /* Setup Transmit Descriptor Settings for eop descriptor */
1340         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1341                 E1000_TXD_CMD_IFCS;
1342
1343         if (hw->mac_type < e1000_82543)
1344                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1345         else
1346                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1347
1348         /* Cache if we're 82544 running in PCI-X because we'll
1349          * need this to apply a workaround later in the send path. */
1350         if (hw->mac_type == e1000_82544 &&
1351             hw->bus_type == e1000_bus_type_pcix)
1352                 adapter->pcix_82544 = 1;
1353 }
1354
1355 /**
1356  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1357  * @adapter: board private structure
1358  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1359  *
1360  * Returns 0 on success, negative on failure
1361  **/
1362
1363 static int
1364 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1365                          struct e1000_rx_ring *rxdr)
1366 {
1367         struct pci_dev *pdev = adapter->pdev;
1368         int size, desc_len;
1369
1370         size = sizeof(struct e1000_buffer) * rxdr->count;
1371         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1372         if (!rxdr->buffer_info) {
1373                 DPRINTK(PROBE, ERR,
1374                 "Unable to allocate memory for the receive descriptor ring\n");
1375                 return -ENOMEM;
1376         }
1377         memset(rxdr->buffer_info, 0, size);
1378
1379         size = sizeof(struct e1000_ps_page) * rxdr->count;
1380         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1381         if(!rxdr->ps_page) {
1382                 vfree(rxdr->buffer_info);
1383                 DPRINTK(PROBE, ERR,
1384                 "Unable to allocate memory for the receive descriptor ring\n");
1385                 return -ENOMEM;
1386         }
1387         memset(rxdr->ps_page, 0, size);
1388
1389         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1390         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1391         if(!rxdr->ps_page_dma) {
1392                 vfree(rxdr->buffer_info);
1393                 kfree(rxdr->ps_page);
1394                 DPRINTK(PROBE, ERR,
1395                 "Unable to allocate memory for the receive descriptor ring\n");
1396                 return -ENOMEM;
1397         }
1398         memset(rxdr->ps_page_dma, 0, size);
1399
1400         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1401                 desc_len = sizeof(struct e1000_rx_desc);
1402         else
1403                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1404
1405         /* Round up to nearest 4K */
1406
1407         rxdr->size = rxdr->count * desc_len;
1408         E1000_ROUNDUP(rxdr->size, 4096);
1409
1410         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1411
1412         if (!rxdr->desc) {
1413                 DPRINTK(PROBE, ERR,
1414                 "Unable to allocate memory for the receive descriptor ring\n");
1415 setup_rx_desc_die:
1416                 vfree(rxdr->buffer_info);
1417                 kfree(rxdr->ps_page);
1418                 kfree(rxdr->ps_page_dma);
1419                 return -ENOMEM;
1420         }
1421
1422         /* Fix for errata 23, can't cross 64kB boundary */
1423         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1424                 void *olddesc = rxdr->desc;
1425                 dma_addr_t olddma = rxdr->dma;
1426                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1427                                      "at %p\n", rxdr->size, rxdr->desc);
1428                 /* Try again, without freeing the previous */
1429                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1430                 /* Failed allocation, critical failure */
1431                 if (!rxdr->desc) {
1432                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1433                         DPRINTK(PROBE, ERR,
1434                                 "Unable to allocate memory "
1435                                 "for the receive descriptor ring\n");
1436                         goto setup_rx_desc_die;
1437                 }
1438
1439                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1440                         /* give up */
1441                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1442                                             rxdr->dma);
1443                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1444                         DPRINTK(PROBE, ERR,
1445                                 "Unable to allocate aligned memory "
1446                                 "for the receive descriptor ring\n");
1447                         goto setup_rx_desc_die;
1448                 } else {
1449                         /* Free old allocation, new allocation was successful */
1450                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1451                 }
1452         }
1453         memset(rxdr->desc, 0, rxdr->size);
1454
1455         rxdr->next_to_clean = 0;
1456         rxdr->next_to_use = 0;
1457
1458         return 0;
1459 }
1460
1461 /**
1462  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1463  *                                (Descriptors) for all queues
1464  * @adapter: board private structure
1465  *
1466  * If this function returns with an error, then it's possible one or
1467  * more of the rings is populated (while the rest are not).  It is the
1468  * callers duty to clean those orphaned rings.
1469  *
1470  * Return 0 on success, negative on failure
1471  **/
1472
1473 int
1474 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1475 {
1476         int i, err = 0;
1477
1478         for (i = 0; i < adapter->num_queues; i++) {
1479                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1480                 if (err) {
1481                         DPRINTK(PROBE, ERR,
1482                                 "Allocation for Rx Queue %u failed\n", i);
1483                         break;
1484                 }
1485         }
1486
1487         return err;
1488 }
1489
1490 /**
1491  * e1000_setup_rctl - configure the receive control registers
1492  * @adapter: Board private structure
1493  **/
1494 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1495                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1496 static void
1497 e1000_setup_rctl(struct e1000_adapter *adapter)
1498 {
1499         uint32_t rctl, rfctl;
1500         uint32_t psrctl = 0;
1501 #ifdef CONFIG_E1000_PACKET_SPLIT
1502         uint32_t pages = 0;
1503 #endif
1504
1505         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1506
1507         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1508
1509         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1510                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1511                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1512
1513         if(adapter->hw.tbi_compatibility_on == 1)
1514                 rctl |= E1000_RCTL_SBP;
1515         else
1516                 rctl &= ~E1000_RCTL_SBP;
1517
1518         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1519                 rctl &= ~E1000_RCTL_LPE;
1520         else
1521                 rctl |= E1000_RCTL_LPE;
1522
1523         /* Setup buffer sizes */
1524         if(adapter->hw.mac_type >= e1000_82571) {
1525                 /* We can now specify buffers in 1K increments.
1526                  * BSIZE and BSEX are ignored in this case. */
1527                 rctl |= adapter->rx_buffer_len << 0x11;
1528         } else {
1529                 rctl &= ~E1000_RCTL_SZ_4096;
1530                 rctl |= E1000_RCTL_BSEX;
1531                 switch (adapter->rx_buffer_len) {
1532                 case E1000_RXBUFFER_2048:
1533                 default:
1534                         rctl |= E1000_RCTL_SZ_2048;
1535                         rctl &= ~E1000_RCTL_BSEX;
1536                         break;
1537                 case E1000_RXBUFFER_4096:
1538                         rctl |= E1000_RCTL_SZ_4096;
1539                         break;
1540                 case E1000_RXBUFFER_8192:
1541                         rctl |= E1000_RCTL_SZ_8192;
1542                         break;
1543                 case E1000_RXBUFFER_16384:
1544                         rctl |= E1000_RCTL_SZ_16384;
1545                         break;
1546                 }
1547         }
1548
1549 #ifdef CONFIG_E1000_PACKET_SPLIT
1550         /* 82571 and greater support packet-split where the protocol
1551          * header is placed in skb->data and the packet data is
1552          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1553          * In the case of a non-split, skb->data is linearly filled,
1554          * followed by the page buffers.  Therefore, skb->data is
1555          * sized to hold the largest protocol header.
1556          */
1557         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1558         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1559             PAGE_SIZE <= 16384)
1560                 adapter->rx_ps_pages = pages;
1561         else
1562                 adapter->rx_ps_pages = 0;
1563 #endif
1564         if (adapter->rx_ps_pages) {
1565                 /* Configure extra packet-split registers */
1566                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1567                 rfctl |= E1000_RFCTL_EXTEN;
1568                 /* disable IPv6 packet split support */
1569                 rfctl |= E1000_RFCTL_IPV6_DIS;
1570                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1571
1572                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1573
1574                 psrctl |= adapter->rx_ps_bsize0 >>
1575                         E1000_PSRCTL_BSIZE0_SHIFT;
1576
1577                 switch (adapter->rx_ps_pages) {
1578                 case 3:
1579                         psrctl |= PAGE_SIZE <<
1580                                 E1000_PSRCTL_BSIZE3_SHIFT;
1581                 case 2:
1582                         psrctl |= PAGE_SIZE <<
1583                                 E1000_PSRCTL_BSIZE2_SHIFT;
1584                 case 1:
1585                         psrctl |= PAGE_SIZE >>
1586                                 E1000_PSRCTL_BSIZE1_SHIFT;
1587                         break;
1588                 }
1589
1590                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1591         }
1592
1593         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1594 }
1595
1596 /**
1597  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1598  * @adapter: board private structure
1599  *
1600  * Configure the Rx unit of the MAC after a reset.
1601  **/
1602
1603 static void
1604 e1000_configure_rx(struct e1000_adapter *adapter)
1605 {
1606         uint64_t rdba;
1607         struct e1000_hw *hw = &adapter->hw;
1608         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1609 #ifdef CONFIG_E1000_MQ
1610         uint32_t reta, mrqc;
1611         int i;
1612 #endif
1613
1614         if (adapter->rx_ps_pages) {
1615                 rdlen = adapter->rx_ring[0].count *
1616                         sizeof(union e1000_rx_desc_packet_split);
1617                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1618                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1619         } else {
1620                 rdlen = adapter->rx_ring[0].count *
1621                         sizeof(struct e1000_rx_desc);
1622                 adapter->clean_rx = e1000_clean_rx_irq;
1623                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1624         }
1625
1626         /* disable receives while setting up the descriptors */
1627         rctl = E1000_READ_REG(hw, RCTL);
1628         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1629
1630         /* set the Receive Delay Timer Register */
1631         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1632
1633         if (hw->mac_type >= e1000_82540) {
1634                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1635                 if(adapter->itr > 1)
1636                         E1000_WRITE_REG(hw, ITR,
1637                                 1000000000 / (adapter->itr * 256));
1638         }
1639
1640         if (hw->mac_type >= e1000_82571) {
1641                 /* Reset delay timers after every interrupt */
1642                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1643                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1644                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1645                 E1000_WRITE_FLUSH(hw);
1646         }
1647
1648         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1649          * the Base and Length of the Rx Descriptor Ring */
1650         switch (adapter->num_queues) {
1651 #ifdef CONFIG_E1000_MQ
1652         case 2:
1653                 rdba = adapter->rx_ring[1].dma;
1654                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1655                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1656                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1657                 E1000_WRITE_REG(hw, RDH1, 0);
1658                 E1000_WRITE_REG(hw, RDT1, 0);
1659                 adapter->rx_ring[1].rdh = E1000_RDH1;
1660                 adapter->rx_ring[1].rdt = E1000_RDT1;
1661                 /* Fall Through */
1662 #endif
1663         case 1:
1664         default:
1665                 rdba = adapter->rx_ring[0].dma;
1666                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1667                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1668                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1669                 E1000_WRITE_REG(hw, RDH, 0);
1670                 E1000_WRITE_REG(hw, RDT, 0);
1671                 adapter->rx_ring[0].rdh = E1000_RDH;
1672                 adapter->rx_ring[0].rdt = E1000_RDT;
1673                 break;
1674         }
1675
1676 #ifdef CONFIG_E1000_MQ
1677         if (adapter->num_queues > 1) {
1678                 uint32_t random[10];
1679
1680                 get_random_bytes(&random[0], 40);
1681
1682                 if (hw->mac_type <= e1000_82572) {
1683                         E1000_WRITE_REG(hw, RSSIR, 0);
1684                         E1000_WRITE_REG(hw, RSSIM, 0);
1685                 }
1686
1687                 switch (adapter->num_queues) {
1688                 case 2:
1689                 default:
1690                         reta = 0x00800080;
1691                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1692                         break;
1693                 }
1694
1695                 /* Fill out redirection table */
1696                 for (i = 0; i < 32; i++)
1697                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1698                 /* Fill out hash function seeds */
1699                 for (i = 0; i < 10; i++)
1700                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1701
1702                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1703                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1704                 E1000_WRITE_REG(hw, MRQC, mrqc);
1705         }
1706
1707         /* Multiqueue and packet checksumming are mutually exclusive. */
1708         if (hw->mac_type >= e1000_82571) {
1709                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1710                 rxcsum |= E1000_RXCSUM_PCSD;
1711                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1712         }
1713
1714 #else
1715
1716         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1717         if (hw->mac_type >= e1000_82543) {
1718                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1719                 if(adapter->rx_csum == TRUE) {
1720                         rxcsum |= E1000_RXCSUM_TUOFL;
1721
1722                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1723                          * Must be used in conjunction with packet-split. */
1724                         if ((hw->mac_type >= e1000_82571) &&
1725                            (adapter->rx_ps_pages)) {
1726                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1727                         }
1728                 } else {
1729                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1730                         /* don't need to clear IPPCSE as it defaults to 0 */
1731                 }
1732                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1733         }
1734 #endif /* CONFIG_E1000_MQ */
1735
1736         if (hw->mac_type == e1000_82573)
1737                 E1000_WRITE_REG(hw, ERT, 0x0100);
1738
1739         /* Enable Receives */
1740         E1000_WRITE_REG(hw, RCTL, rctl);
1741 }
1742
1743 /**
1744  * e1000_free_tx_resources - Free Tx Resources per Queue
1745  * @adapter: board private structure
1746  * @tx_ring: Tx descriptor ring for a specific queue
1747  *
1748  * Free all transmit software resources
1749  **/
1750
1751 static void
1752 e1000_free_tx_resources(struct e1000_adapter *adapter,
1753                         struct e1000_tx_ring *tx_ring)
1754 {
1755         struct pci_dev *pdev = adapter->pdev;
1756
1757         e1000_clean_tx_ring(adapter, tx_ring);
1758
1759         vfree(tx_ring->buffer_info);
1760         tx_ring->buffer_info = NULL;
1761
1762         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1763
1764         tx_ring->desc = NULL;
1765 }
1766
1767 /**
1768  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1769  * @adapter: board private structure
1770  *
1771  * Free all transmit software resources
1772  **/
1773
1774 void
1775 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1776 {
1777         int i;
1778
1779         for (i = 0; i < adapter->num_queues; i++)
1780                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1781 }
1782
1783 static inline void
1784 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1785                         struct e1000_buffer *buffer_info)
1786 {
1787         if(buffer_info->dma) {
1788                 pci_unmap_page(adapter->pdev,
1789                                 buffer_info->dma,
1790                                 buffer_info->length,
1791                                 PCI_DMA_TODEVICE);
1792                 buffer_info->dma = 0;
1793         }
1794         if(buffer_info->skb) {
1795                 dev_kfree_skb_any(buffer_info->skb);
1796                 buffer_info->skb = NULL;
1797         }
1798 }
1799
1800 /**
1801  * e1000_clean_tx_ring - Free Tx Buffers
1802  * @adapter: board private structure
1803  * @tx_ring: ring to be cleaned
1804  **/
1805
1806 static void
1807 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1808                     struct e1000_tx_ring *tx_ring)
1809 {
1810         struct e1000_buffer *buffer_info;
1811         unsigned long size;
1812         unsigned int i;
1813
1814         /* Free all the Tx ring sk_buffs */
1815
1816         for(i = 0; i < tx_ring->count; i++) {
1817                 buffer_info = &tx_ring->buffer_info[i];
1818                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1819         }
1820
1821         size = sizeof(struct e1000_buffer) * tx_ring->count;
1822         memset(tx_ring->buffer_info, 0, size);
1823
1824         /* Zero out the descriptor ring */
1825
1826         memset(tx_ring->desc, 0, tx_ring->size);
1827
1828         tx_ring->next_to_use = 0;
1829         tx_ring->next_to_clean = 0;
1830         tx_ring->last_tx_tso = 0;
1831
1832         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1833         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1834 }
1835
1836 /**
1837  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1838  * @adapter: board private structure
1839  **/
1840
1841 static void
1842 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1843 {
1844         int i;
1845
1846         for (i = 0; i < adapter->num_queues; i++)
1847                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1848 }
1849
1850 /**
1851  * e1000_free_rx_resources - Free Rx Resources
1852  * @adapter: board private structure
1853  * @rx_ring: ring to clean the resources from
1854  *
1855  * Free all receive software resources
1856  **/
1857
1858 static void
1859 e1000_free_rx_resources(struct e1000_adapter *adapter,
1860                         struct e1000_rx_ring *rx_ring)
1861 {
1862         struct pci_dev *pdev = adapter->pdev;
1863
1864         e1000_clean_rx_ring(adapter, rx_ring);
1865
1866         vfree(rx_ring->buffer_info);
1867         rx_ring->buffer_info = NULL;
1868         kfree(rx_ring->ps_page);
1869         rx_ring->ps_page = NULL;
1870         kfree(rx_ring->ps_page_dma);
1871         rx_ring->ps_page_dma = NULL;
1872
1873         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1874
1875         rx_ring->desc = NULL;
1876 }
1877
1878 /**
1879  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1880  * @adapter: board private structure
1881  *
1882  * Free all receive software resources
1883  **/
1884
1885 void
1886 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1887 {
1888         int i;
1889
1890         for (i = 0; i < adapter->num_queues; i++)
1891                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1892 }
1893
1894 /**
1895  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1896  * @adapter: board private structure
1897  * @rx_ring: ring to free buffers from
1898  **/
1899
1900 static void
1901 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1902                     struct e1000_rx_ring *rx_ring)
1903 {
1904         struct e1000_buffer *buffer_info;
1905         struct e1000_ps_page *ps_page;
1906         struct e1000_ps_page_dma *ps_page_dma;
1907         struct pci_dev *pdev = adapter->pdev;
1908         unsigned long size;
1909         unsigned int i, j;
1910
1911         /* Free all the Rx ring sk_buffs */
1912
1913         for(i = 0; i < rx_ring->count; i++) {
1914                 buffer_info = &rx_ring->buffer_info[i];
1915                 if(buffer_info->skb) {
1916                         ps_page = &rx_ring->ps_page[i];
1917                         ps_page_dma = &rx_ring->ps_page_dma[i];
1918                         pci_unmap_single(pdev,
1919                                          buffer_info->dma,
1920                                          buffer_info->length,
1921                                          PCI_DMA_FROMDEVICE);
1922
1923                         dev_kfree_skb(buffer_info->skb);
1924                         buffer_info->skb = NULL;
1925
1926                         for(j = 0; j < adapter->rx_ps_pages; j++) {
1927                                 if(!ps_page->ps_page[j]) break;
1928                                 pci_unmap_single(pdev,
1929                                                  ps_page_dma->ps_page_dma[j],
1930                                                  PAGE_SIZE, PCI_DMA_FROMDEVICE);
1931                                 ps_page_dma->ps_page_dma[j] = 0;
1932                                 put_page(ps_page->ps_page[j]);
1933                                 ps_page->ps_page[j] = NULL;
1934                         }
1935                 }
1936         }
1937
1938         size = sizeof(struct e1000_buffer) * rx_ring->count;
1939         memset(rx_ring->buffer_info, 0, size);
1940         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1941         memset(rx_ring->ps_page, 0, size);
1942         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1943         memset(rx_ring->ps_page_dma, 0, size);
1944
1945         /* Zero out the descriptor ring */
1946
1947         memset(rx_ring->desc, 0, rx_ring->size);
1948
1949         rx_ring->next_to_clean = 0;
1950         rx_ring->next_to_use = 0;
1951
1952         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1953         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1954 }
1955
1956 /**
1957  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
1958  * @adapter: board private structure
1959  **/
1960
1961 static void
1962 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
1963 {
1964         int i;
1965
1966         for (i = 0; i < adapter->num_queues; i++)
1967                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1968 }
1969
1970 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
1971  * and memory write and invalidate disabled for certain operations
1972  */
1973 static void
1974 e1000_enter_82542_rst(struct e1000_adapter *adapter)
1975 {
1976         struct net_device *netdev = adapter->netdev;
1977         uint32_t rctl;
1978
1979         e1000_pci_clear_mwi(&adapter->hw);
1980
1981         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1982         rctl |= E1000_RCTL_RST;
1983         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1984         E1000_WRITE_FLUSH(&adapter->hw);
1985         mdelay(5);
1986
1987         if(netif_running(netdev))
1988                 e1000_clean_all_rx_rings(adapter);
1989 }
1990
1991 static void
1992 e1000_leave_82542_rst(struct e1000_adapter *adapter)
1993 {
1994         struct net_device *netdev = adapter->netdev;
1995         uint32_t rctl;
1996
1997         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1998         rctl &= ~E1000_RCTL_RST;
1999         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2000         E1000_WRITE_FLUSH(&adapter->hw);
2001         mdelay(5);
2002
2003         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2004                 e1000_pci_set_mwi(&adapter->hw);
2005
2006         if(netif_running(netdev)) {
2007                 e1000_configure_rx(adapter);
2008                 e1000_alloc_rx_buffers(adapter, &adapter->rx_ring[0]);
2009         }
2010 }
2011
2012 /**
2013  * e1000_set_mac - Change the Ethernet Address of the NIC
2014  * @netdev: network interface device structure
2015  * @p: pointer to an address structure
2016  *
2017  * Returns 0 on success, negative on failure
2018  **/
2019
2020 static int
2021 e1000_set_mac(struct net_device *netdev, void *p)
2022 {
2023         struct e1000_adapter *adapter = netdev_priv(netdev);
2024         struct sockaddr *addr = p;
2025
2026         if(!is_valid_ether_addr(addr->sa_data))
2027                 return -EADDRNOTAVAIL;
2028
2029         /* 82542 2.0 needs to be in reset to write receive address registers */
2030
2031         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2032                 e1000_enter_82542_rst(adapter);
2033
2034         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2035         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2036
2037         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2038
2039         /* With 82571 controllers, LAA may be overwritten (with the default)
2040          * due to controller reset from the other port. */
2041         if (adapter->hw.mac_type == e1000_82571) {
2042                 /* activate the work around */
2043                 adapter->hw.laa_is_present = 1;
2044
2045                 /* Hold a copy of the LAA in RAR[14] This is done so that
2046                  * between the time RAR[0] gets clobbered  and the time it
2047                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2048                  * of the RARs and no incoming packets directed to this port
2049                  * are dropped. Eventaully the LAA will be in RAR[0] and
2050                  * RAR[14] */
2051                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2052                                         E1000_RAR_ENTRIES - 1);
2053         }
2054
2055         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2056                 e1000_leave_82542_rst(adapter);
2057
2058         return 0;
2059 }
2060
2061 /**
2062  * e1000_set_multi - Multicast and Promiscuous mode set
2063  * @netdev: network interface device structure
2064  *
2065  * The set_multi entry point is called whenever the multicast address
2066  * list or the network interface flags are updated.  This routine is
2067  * responsible for configuring the hardware for proper multicast,
2068  * promiscuous mode, and all-multi behavior.
2069  **/
2070
2071 static void
2072 e1000_set_multi(struct net_device *netdev)
2073 {
2074         struct e1000_adapter *adapter = netdev_priv(netdev);
2075         struct e1000_hw *hw = &adapter->hw;
2076         struct dev_mc_list *mc_ptr;
2077         uint32_t rctl;
2078         uint32_t hash_value;
2079         int i, rar_entries = E1000_RAR_ENTRIES;
2080
2081         /* reserve RAR[14] for LAA over-write work-around */
2082         if (adapter->hw.mac_type == e1000_82571)
2083                 rar_entries--;
2084
2085         /* Check for Promiscuous and All Multicast modes */
2086
2087         rctl = E1000_READ_REG(hw, RCTL);
2088
2089         if(netdev->flags & IFF_PROMISC) {
2090                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2091         } else if(netdev->flags & IFF_ALLMULTI) {
2092                 rctl |= E1000_RCTL_MPE;
2093                 rctl &= ~E1000_RCTL_UPE;
2094         } else {
2095                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2096         }
2097
2098         E1000_WRITE_REG(hw, RCTL, rctl);
2099
2100         /* 82542 2.0 needs to be in reset to write receive address registers */
2101
2102         if(hw->mac_type == e1000_82542_rev2_0)
2103                 e1000_enter_82542_rst(adapter);
2104
2105         /* load the first 14 multicast address into the exact filters 1-14
2106          * RAR 0 is used for the station MAC adddress
2107          * if there are not 14 addresses, go ahead and clear the filters
2108          * -- with 82571 controllers only 0-13 entries are filled here
2109          */
2110         mc_ptr = netdev->mc_list;
2111
2112         for(i = 1; i < rar_entries; i++) {
2113                 if (mc_ptr) {
2114                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2115                         mc_ptr = mc_ptr->next;
2116                 } else {
2117                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2118                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2119                 }
2120         }
2121
2122         /* clear the old settings from the multicast hash table */
2123
2124         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2125                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2126
2127         /* load any remaining addresses into the hash table */
2128
2129         for(; mc_ptr; mc_ptr = mc_ptr->next) {
2130                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2131                 e1000_mta_set(hw, hash_value);
2132         }
2133
2134         if(hw->mac_type == e1000_82542_rev2_0)
2135                 e1000_leave_82542_rst(adapter);
2136 }
2137
2138 /* Need to wait a few seconds after link up to get diagnostic information from
2139  * the phy */
2140
2141 static void
2142 e1000_update_phy_info(unsigned long data)
2143 {
2144         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2145         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2146 }
2147
2148 /**
2149  * e1000_82547_tx_fifo_stall - Timer Call-back
2150  * @data: pointer to adapter cast into an unsigned long
2151  **/
2152
2153 static void
2154 e1000_82547_tx_fifo_stall(unsigned long data)
2155 {
2156         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2157         struct net_device *netdev = adapter->netdev;
2158         uint32_t tctl;
2159
2160         if(atomic_read(&adapter->tx_fifo_stall)) {
2161                 if((E1000_READ_REG(&adapter->hw, TDT) ==
2162                     E1000_READ_REG(&adapter->hw, TDH)) &&
2163                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2164                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2165                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2166                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2167                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2168                         E1000_WRITE_REG(&adapter->hw, TCTL,
2169                                         tctl & ~E1000_TCTL_EN);
2170                         E1000_WRITE_REG(&adapter->hw, TDFT,
2171                                         adapter->tx_head_addr);
2172                         E1000_WRITE_REG(&adapter->hw, TDFH,
2173                                         adapter->tx_head_addr);
2174                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2175                                         adapter->tx_head_addr);
2176                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2177                                         adapter->tx_head_addr);
2178                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2179                         E1000_WRITE_FLUSH(&adapter->hw);
2180
2181                         adapter->tx_fifo_head = 0;
2182                         atomic_set(&adapter->tx_fifo_stall, 0);
2183                         netif_wake_queue(netdev);
2184                 } else {
2185                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2186                 }
2187         }
2188 }
2189
2190 /**
2191  * e1000_watchdog - Timer Call-back
2192  * @data: pointer to adapter cast into an unsigned long
2193  **/
2194 static void
2195 e1000_watchdog(unsigned long data)
2196 {
2197         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2198
2199         /* Do the rest outside of interrupt context */
2200         schedule_work(&adapter->watchdog_task);
2201 }
2202
2203 static void
2204 e1000_watchdog_task(struct e1000_adapter *adapter)
2205 {
2206         struct net_device *netdev = adapter->netdev;
2207         struct e1000_tx_ring *txdr = adapter->tx_ring;
2208         uint32_t link;
2209
2210         e1000_check_for_link(&adapter->hw);
2211         if (adapter->hw.mac_type == e1000_82573) {
2212                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2213                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2214                         e1000_update_mng_vlan(adapter);
2215         }
2216
2217         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2218            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2219                 link = !adapter->hw.serdes_link_down;
2220         else
2221                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2222
2223         if(link) {
2224                 if(!netif_carrier_ok(netdev)) {
2225                         e1000_get_speed_and_duplex(&adapter->hw,
2226                                                    &adapter->link_speed,
2227                                                    &adapter->link_duplex);
2228
2229                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2230                                adapter->link_speed,
2231                                adapter->link_duplex == FULL_DUPLEX ?
2232                                "Full Duplex" : "Half Duplex");
2233
2234                         netif_carrier_on(netdev);
2235                         netif_wake_queue(netdev);
2236                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2237                         adapter->smartspeed = 0;
2238                 }
2239         } else {
2240                 if(netif_carrier_ok(netdev)) {
2241                         adapter->link_speed = 0;
2242                         adapter->link_duplex = 0;
2243                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2244                         netif_carrier_off(netdev);
2245                         netif_stop_queue(netdev);
2246                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2247                 }
2248
2249                 e1000_smartspeed(adapter);
2250         }
2251
2252         e1000_update_stats(adapter);
2253
2254         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2255         adapter->tpt_old = adapter->stats.tpt;
2256         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2257         adapter->colc_old = adapter->stats.colc;
2258
2259         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2260         adapter->gorcl_old = adapter->stats.gorcl;
2261         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2262         adapter->gotcl_old = adapter->stats.gotcl;
2263
2264         e1000_update_adaptive(&adapter->hw);
2265
2266         if (adapter->num_queues == 1 && !netif_carrier_ok(netdev)) {
2267                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2268                         /* We've lost link, so the controller stops DMA,
2269                          * but we've got queued Tx work that's never going
2270                          * to get done, so reset controller to flush Tx.
2271                          * (Do the reset outside of interrupt context). */
2272                         schedule_work(&adapter->tx_timeout_task);
2273                 }
2274         }
2275
2276         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2277         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2278                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2279                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2280                  * else is between 2000-8000. */
2281                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2282                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2283                         adapter->gotcl - adapter->gorcl :
2284                         adapter->gorcl - adapter->gotcl) / 10000;
2285                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2286                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2287         }
2288
2289         /* Cause software interrupt to ensure rx ring is cleaned */
2290         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2291
2292         /* Force detection of hung controller every watchdog period */
2293         adapter->detect_tx_hung = TRUE;
2294
2295         /* With 82571 controllers, LAA may be overwritten due to controller
2296          * reset from the other port. Set the appropriate LAA in RAR[0] */
2297         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2298                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2299
2300         /* Reset the timer */
2301         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2302 }
2303
2304 #define E1000_TX_FLAGS_CSUM             0x00000001
2305 #define E1000_TX_FLAGS_VLAN             0x00000002
2306 #define E1000_TX_FLAGS_TSO              0x00000004
2307 #define E1000_TX_FLAGS_IPV4             0x00000008
2308 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2309 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2310
2311 static inline int
2312 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2313           struct sk_buff *skb)
2314 {
2315 #ifdef NETIF_F_TSO
2316         struct e1000_context_desc *context_desc;
2317         struct e1000_buffer *buffer_info;
2318         unsigned int i;
2319         uint32_t cmd_length = 0;
2320         uint16_t ipcse = 0, tucse, mss;
2321         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2322         int err;
2323
2324         if(skb_shinfo(skb)->tso_size) {
2325                 if (skb_header_cloned(skb)) {
2326                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2327                         if (err)
2328                                 return err;
2329                 }
2330
2331                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2332                 mss = skb_shinfo(skb)->tso_size;
2333                 if(skb->protocol == ntohs(ETH_P_IP)) {
2334                         skb->nh.iph->tot_len = 0;
2335                         skb->nh.iph->check = 0;
2336                         skb->h.th->check =
2337                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2338                                                    skb->nh.iph->daddr,
2339                                                    0,
2340                                                    IPPROTO_TCP,
2341                                                    0);
2342                         cmd_length = E1000_TXD_CMD_IP;
2343                         ipcse = skb->h.raw - skb->data - 1;
2344 #ifdef NETIF_F_TSO_IPV6
2345                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2346                         skb->nh.ipv6h->payload_len = 0;
2347                         skb->h.th->check =
2348                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2349                                                  &skb->nh.ipv6h->daddr,
2350                                                  0,
2351                                                  IPPROTO_TCP,
2352                                                  0);
2353                         ipcse = 0;
2354 #endif
2355                 }
2356                 ipcss = skb->nh.raw - skb->data;
2357                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2358                 tucss = skb->h.raw - skb->data;
2359                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2360                 tucse = 0;
2361
2362                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2363                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2364
2365                 i = tx_ring->next_to_use;
2366                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2367                 buffer_info = &tx_ring->buffer_info[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                 buffer_info->time_stamp = jiffies;
2380
2381                 if (++i == tx_ring->count) i = 0;
2382                 tx_ring->next_to_use = i;
2383
2384                 return 1;
2385         }
2386 #endif
2387
2388         return 0;
2389 }
2390
2391 static inline boolean_t
2392 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2393               struct sk_buff *skb)
2394 {
2395         struct e1000_context_desc *context_desc;
2396         struct e1000_buffer *buffer_info;
2397         unsigned int i;
2398         uint8_t css;
2399
2400         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2401                 css = skb->h.raw - skb->data;
2402
2403                 i = tx_ring->next_to_use;
2404                 buffer_info = &tx_ring->buffer_info[i];
2405                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2406
2407                 context_desc->upper_setup.tcp_fields.tucss = css;
2408                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2409                 context_desc->upper_setup.tcp_fields.tucse = 0;
2410                 context_desc->tcp_seg_setup.data = 0;
2411                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2412
2413                 buffer_info->time_stamp = jiffies;
2414
2415                 if (unlikely(++i == tx_ring->count)) i = 0;
2416                 tx_ring->next_to_use = i;
2417
2418                 return TRUE;
2419         }
2420
2421         return FALSE;
2422 }
2423
2424 #define E1000_MAX_TXD_PWR       12
2425 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2426
2427 static inline int
2428 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2429              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2430              unsigned int nr_frags, unsigned int mss)
2431 {
2432         struct e1000_buffer *buffer_info;
2433         unsigned int len = skb->len;
2434         unsigned int offset = 0, size, count = 0, i;
2435         unsigned int f;
2436         len -= skb->data_len;
2437
2438         i = tx_ring->next_to_use;
2439
2440         while(len) {
2441                 buffer_info = &tx_ring->buffer_info[i];
2442                 size = min(len, max_per_txd);
2443 #ifdef NETIF_F_TSO
2444                 /* Workaround for Controller erratum --
2445                  * descriptor for non-tso packet in a linear SKB that follows a
2446                  * tso gets written back prematurely before the data is fully
2447                  * DMAd to the controller */
2448                 if (!skb->data_len && tx_ring->last_tx_tso &&
2449                                 !skb_shinfo(skb)->tso_size) {
2450                         tx_ring->last_tx_tso = 0;
2451                         size -= 4;
2452                 }
2453
2454                 /* Workaround for premature desc write-backs
2455                  * in TSO mode.  Append 4-byte sentinel desc */
2456                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2457                         size -= 4;
2458 #endif
2459                 /* work-around for errata 10 and it applies
2460                  * to all controllers in PCI-X mode
2461                  * The fix is to make sure that the first descriptor of a
2462                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2463                  */
2464                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2465                                 (size > 2015) && count == 0))
2466                         size = 2015;
2467
2468                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2469                  * terminating buffers within evenly-aligned dwords. */
2470                 if(unlikely(adapter->pcix_82544 &&
2471                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2472                    size > 4))
2473                         size -= 4;
2474
2475                 buffer_info->length = size;
2476                 buffer_info->dma =
2477                         pci_map_single(adapter->pdev,
2478                                 skb->data + offset,
2479                                 size,
2480                                 PCI_DMA_TODEVICE);
2481                 buffer_info->time_stamp = jiffies;
2482
2483                 len -= size;
2484                 offset += size;
2485                 count++;
2486                 if(unlikely(++i == tx_ring->count)) i = 0;
2487         }
2488
2489         for(f = 0; f < nr_frags; f++) {
2490                 struct skb_frag_struct *frag;
2491
2492                 frag = &skb_shinfo(skb)->frags[f];
2493                 len = frag->size;
2494                 offset = frag->page_offset;
2495
2496                 while(len) {
2497                         buffer_info = &tx_ring->buffer_info[i];
2498                         size = min(len, max_per_txd);
2499 #ifdef NETIF_F_TSO
2500                         /* Workaround for premature desc write-backs
2501                          * in TSO mode.  Append 4-byte sentinel desc */
2502                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2503                                 size -= 4;
2504 #endif
2505                         /* Workaround for potential 82544 hang in PCI-X.
2506                          * Avoid terminating buffers within evenly-aligned
2507                          * dwords. */
2508                         if(unlikely(adapter->pcix_82544 &&
2509                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2510                            size > 4))
2511                                 size -= 4;
2512
2513                         buffer_info->length = size;
2514                         buffer_info->dma =
2515                                 pci_map_page(adapter->pdev,
2516                                         frag->page,
2517                                         offset,
2518                                         size,
2519                                         PCI_DMA_TODEVICE);
2520                         buffer_info->time_stamp = jiffies;
2521
2522                         len -= size;
2523                         offset += size;
2524                         count++;
2525                         if(unlikely(++i == tx_ring->count)) i = 0;
2526                 }
2527         }
2528
2529         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2530         tx_ring->buffer_info[i].skb = skb;
2531         tx_ring->buffer_info[first].next_to_watch = i;
2532
2533         return count;
2534 }
2535
2536 static inline void
2537 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2538                int tx_flags, int count)
2539 {
2540         struct e1000_tx_desc *tx_desc = NULL;
2541         struct e1000_buffer *buffer_info;
2542         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2543         unsigned int i;
2544
2545         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2546                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2547                              E1000_TXD_CMD_TSE;
2548                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2549
2550                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2551                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2552         }
2553
2554         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2555                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2556                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2557         }
2558
2559         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2560                 txd_lower |= E1000_TXD_CMD_VLE;
2561                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2562         }
2563
2564         i = tx_ring->next_to_use;
2565
2566         while(count--) {
2567                 buffer_info = &tx_ring->buffer_info[i];
2568                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2569                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2570                 tx_desc->lower.data =
2571                         cpu_to_le32(txd_lower | buffer_info->length);
2572                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2573                 if(unlikely(++i == tx_ring->count)) i = 0;
2574         }
2575
2576         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2577
2578         /* Force memory writes to complete before letting h/w
2579          * know there are new descriptors to fetch.  (Only
2580          * applicable for weak-ordered memory model archs,
2581          * such as IA-64). */
2582         wmb();
2583
2584         tx_ring->next_to_use = i;
2585         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2586 }
2587
2588 /**
2589  * 82547 workaround to avoid controller hang in half-duplex environment.
2590  * The workaround is to avoid queuing a large packet that would span
2591  * the internal Tx FIFO ring boundary by notifying the stack to resend
2592  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2593  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2594  * to the beginning of the Tx FIFO.
2595  **/
2596
2597 #define E1000_FIFO_HDR                  0x10
2598 #define E1000_82547_PAD_LEN             0x3E0
2599
2600 static inline int
2601 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2602 {
2603         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2604         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2605
2606         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2607
2608         if(adapter->link_duplex != HALF_DUPLEX)
2609                 goto no_fifo_stall_required;
2610
2611         if(atomic_read(&adapter->tx_fifo_stall))
2612                 return 1;
2613
2614         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2615                 atomic_set(&adapter->tx_fifo_stall, 1);
2616                 return 1;
2617         }
2618
2619 no_fifo_stall_required:
2620         adapter->tx_fifo_head += skb_fifo_len;
2621         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2622                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2623         return 0;
2624 }
2625
2626 #define MINIMUM_DHCP_PACKET_SIZE 282
2627 static inline int
2628 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2629 {
2630         struct e1000_hw *hw =  &adapter->hw;
2631         uint16_t length, offset;
2632         if(vlan_tx_tag_present(skb)) {
2633                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2634                         ( adapter->hw.mng_cookie.status &
2635                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2636                         return 0;
2637         }
2638         if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2639                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2640                 if((htons(ETH_P_IP) == eth->h_proto)) {
2641                         const struct iphdr *ip =
2642                                 (struct iphdr *)((uint8_t *)skb->data+14);
2643                         if(IPPROTO_UDP == ip->protocol) {
2644                                 struct udphdr *udp =
2645                                         (struct udphdr *)((uint8_t *)ip +
2646                                                 (ip->ihl << 2));
2647                                 if(ntohs(udp->dest) == 67) {
2648                                         offset = (uint8_t *)udp + 8 - skb->data;
2649                                         length = skb->len - offset;
2650
2651                                         return e1000_mng_write_dhcp_info(hw,
2652                                                         (uint8_t *)udp + 8,
2653                                                         length);
2654                                 }
2655                         }
2656                 }
2657         }
2658         return 0;
2659 }
2660
2661 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2662 static int
2663 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2664 {
2665         struct e1000_adapter *adapter = netdev_priv(netdev);
2666         struct e1000_tx_ring *tx_ring;
2667         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2668         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2669         unsigned int tx_flags = 0;
2670         unsigned int len = skb->len;
2671         unsigned long flags;
2672         unsigned int nr_frags = 0;
2673         unsigned int mss = 0;
2674         int count = 0;
2675         int tso;
2676         unsigned int f;
2677         len -= skb->data_len;
2678
2679 #ifdef CONFIG_E1000_MQ
2680         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2681 #else
2682         tx_ring = adapter->tx_ring;
2683 #endif
2684
2685         if (unlikely(skb->len <= 0)) {
2686                 dev_kfree_skb_any(skb);
2687                 return NETDEV_TX_OK;
2688         }
2689
2690 #ifdef NETIF_F_TSO
2691         mss = skb_shinfo(skb)->tso_size;
2692         /* The controller does a simple calculation to
2693          * make sure there is enough room in the FIFO before
2694          * initiating the DMA for each buffer.  The calc is:
2695          * 4 = ceil(buffer len/mss).  To make sure we don't
2696          * overrun the FIFO, adjust the max buffer len if mss
2697          * drops. */
2698         if(mss) {
2699                 uint8_t hdr_len;
2700                 max_per_txd = min(mss << 2, max_per_txd);
2701                 max_txd_pwr = fls(max_per_txd) - 1;
2702
2703         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2704          * points to just header, pull a few bytes of payload from
2705          * frags into skb->data */
2706                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2707                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2708                         (adapter->hw.mac_type == e1000_82571 ||
2709                         adapter->hw.mac_type == e1000_82572)) {
2710                         len = skb->len - skb->data_len;
2711                 }
2712         }
2713
2714         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2715         /* reserve a descriptor for the offload context */
2716                 count++;
2717         count++;
2718 #else
2719         if(skb->ip_summed == CHECKSUM_HW)
2720                 count++;
2721 #endif
2722
2723 #ifdef NETIF_F_TSO
2724         /* Controller Erratum workaround */
2725         if (!skb->data_len && tx_ring->last_tx_tso &&
2726                 !skb_shinfo(skb)->tso_size)
2727                 count++;
2728 #endif
2729
2730         count += TXD_USE_COUNT(len, max_txd_pwr);
2731
2732         if(adapter->pcix_82544)
2733                 count++;
2734
2735         /* work-around for errata 10 and it applies to all controllers
2736          * in PCI-X mode, so add one more descriptor to the count
2737          */
2738         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2739                         (len > 2015)))
2740                 count++;
2741
2742         nr_frags = skb_shinfo(skb)->nr_frags;
2743         for(f = 0; f < nr_frags; f++)
2744                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2745                                        max_txd_pwr);
2746         if(adapter->pcix_82544)
2747                 count += nr_frags;
2748
2749                 unsigned int pull_size;
2750                 pull_size = min((unsigned int)4, skb->data_len);
2751                 if (!__pskb_pull_tail(skb, pull_size)) {
2752                         printk(KERN_ERR "__pskb_pull_tail failed.\n");
2753                         dev_kfree_skb_any(skb);
2754                         return -EFAULT;
2755                 }
2756
2757         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2758                 e1000_transfer_dhcp_info(adapter, skb);
2759
2760         local_irq_save(flags);
2761         if (!spin_trylock(&tx_ring->tx_lock)) {
2762                 /* Collision - tell upper layer to requeue */
2763                 local_irq_restore(flags);
2764                 return NETDEV_TX_LOCKED;
2765         }
2766
2767         /* need: count + 2 desc gap to keep tail from touching
2768          * head, otherwise try next time */
2769         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2770                 netif_stop_queue(netdev);
2771                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2772                 return NETDEV_TX_BUSY;
2773         }
2774
2775         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2776                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2777                         netif_stop_queue(netdev);
2778                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2779                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2780                         return NETDEV_TX_BUSY;
2781                 }
2782         }
2783
2784         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2785                 tx_flags |= E1000_TX_FLAGS_VLAN;
2786                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2787         }
2788
2789         first = tx_ring->next_to_use;
2790
2791         tso = e1000_tso(adapter, tx_ring, skb);
2792         if (tso < 0) {
2793                 dev_kfree_skb_any(skb);
2794                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2795                 return NETDEV_TX_OK;
2796         }
2797
2798         if (likely(tso)) {
2799                 tx_ring->last_tx_tso = 1;
2800                 tx_flags |= E1000_TX_FLAGS_TSO;
2801         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2802                 tx_flags |= E1000_TX_FLAGS_CSUM;
2803
2804         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2805          * 82571 hardware supports TSO capabilities for IPv6 as well...
2806          * no longer assume, we must. */
2807         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2808                 tx_flags |= E1000_TX_FLAGS_IPV4;
2809
2810         e1000_tx_queue(adapter, tx_ring, tx_flags,
2811                        e1000_tx_map(adapter, tx_ring, skb, first,
2812                                     max_per_txd, nr_frags, mss));
2813
2814         netdev->trans_start = jiffies;
2815
2816         /* Make sure there is space in the ring for the next send. */
2817         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2818                 netif_stop_queue(netdev);
2819
2820         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2821         return NETDEV_TX_OK;
2822 }
2823
2824 /**
2825  * e1000_tx_timeout - Respond to a Tx Hang
2826  * @netdev: network interface device structure
2827  **/
2828
2829 static void
2830 e1000_tx_timeout(struct net_device *netdev)
2831 {
2832         struct e1000_adapter *adapter = netdev_priv(netdev);
2833
2834         /* Do the reset outside of interrupt context */
2835         schedule_work(&adapter->tx_timeout_task);
2836 }
2837
2838 static void
2839 e1000_tx_timeout_task(struct net_device *netdev)
2840 {
2841         struct e1000_adapter *adapter = netdev_priv(netdev);
2842
2843         e1000_down(adapter);
2844         e1000_up(adapter);
2845 }
2846
2847 /**
2848  * e1000_get_stats - Get System Network Statistics
2849  * @netdev: network interface device structure
2850  *
2851  * Returns the address of the device statistics structure.
2852  * The statistics are actually updated from the timer callback.
2853  **/
2854
2855 static struct net_device_stats *
2856 e1000_get_stats(struct net_device *netdev)
2857 {
2858         struct e1000_adapter *adapter = netdev_priv(netdev);
2859
2860         e1000_update_stats(adapter);
2861         return &adapter->net_stats;
2862 }
2863
2864 /**
2865  * e1000_change_mtu - Change the Maximum Transfer Unit
2866  * @netdev: network interface device structure
2867  * @new_mtu: new value for maximum frame size
2868  *
2869  * Returns 0 on success, negative on failure
2870  **/
2871
2872 static int
2873 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2874 {
2875         struct e1000_adapter *adapter = netdev_priv(netdev);
2876         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2877
2878         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2879                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2880                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2881                         return -EINVAL;
2882         }
2883
2884 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2885         /* might want this to be bigger enum check... */
2886         /* 82571 controllers limit jumbo frame size to 10500 bytes */
2887         if ((adapter->hw.mac_type == e1000_82571 ||
2888              adapter->hw.mac_type == e1000_82572) &&
2889             max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2890                 DPRINTK(PROBE, ERR, "MTU > 9216 bytes not supported "
2891                                     "on 82571 and 82572 controllers.\n");
2892                 return -EINVAL;
2893         }
2894
2895         if(adapter->hw.mac_type == e1000_82573 &&
2896             max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2897                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2898                                     "on 82573\n");
2899                 return -EINVAL;
2900         }
2901
2902         if(adapter->hw.mac_type > e1000_82547_rev_2) {
2903                 adapter->rx_buffer_len = max_frame;
2904                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
2905         } else {
2906                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
2907                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
2908                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2909                                             "on 82542\n");
2910                         return -EINVAL;
2911
2912                 } else {
2913                         if(max_frame <= E1000_RXBUFFER_2048) {
2914                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2915                         } else if(max_frame <= E1000_RXBUFFER_4096) {
2916                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2917                         } else if(max_frame <= E1000_RXBUFFER_8192) {
2918                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2919                         } else if(max_frame <= E1000_RXBUFFER_16384) {
2920                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2921                         }
2922                 }
2923         }
2924
2925         netdev->mtu = new_mtu;
2926
2927         if(netif_running(netdev)) {
2928                 e1000_down(adapter);
2929                 e1000_up(adapter);
2930         }
2931
2932         adapter->hw.max_frame_size = max_frame;
2933
2934         return 0;
2935 }
2936
2937 /**
2938  * e1000_update_stats - Update the board statistics counters
2939  * @adapter: board private structure
2940  **/
2941
2942 void
2943 e1000_update_stats(struct e1000_adapter *adapter)
2944 {
2945         struct e1000_hw *hw = &adapter->hw;
2946         unsigned long flags;
2947         uint16_t phy_tmp;
2948
2949 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2950
2951         spin_lock_irqsave(&adapter->stats_lock, flags);
2952
2953         /* these counters are modified from e1000_adjust_tbi_stats,
2954          * called from the interrupt context, so they must only
2955          * be written while holding adapter->stats_lock
2956          */
2957
2958         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2959         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2960         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2961         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2962         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2963         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2964         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2965         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2966         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2967         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2968         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2969         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2970         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2971
2972         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2973         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2974         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2975         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2976         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2977         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2978         adapter->stats.dc += E1000_READ_REG(hw, DC);
2979         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2980         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2981         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2982         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2983         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2984         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2985         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2986         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2987         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2988         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2989         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2990         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2991         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2992         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2993         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2994         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2995         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2996         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2997         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2998         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2999         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3000         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3001         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3002         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3003         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3004         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3005         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3006
3007         /* used for adaptive IFS */
3008
3009         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3010         adapter->stats.tpt += hw->tx_packet_delta;
3011         hw->collision_delta = E1000_READ_REG(hw, COLC);
3012         adapter->stats.colc += hw->collision_delta;
3013
3014         if(hw->mac_type >= e1000_82543) {
3015                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3016                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3017                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3018                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3019                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3020                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3021         }
3022         if(hw->mac_type > e1000_82547_rev_2) {
3023                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3024                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3025                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3026                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3027                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3028                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3029                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3030                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3031                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3032         }
3033
3034         /* Fill out the OS statistics structure */
3035
3036         adapter->net_stats.rx_packets = adapter->stats.gprc;
3037         adapter->net_stats.tx_packets = adapter->stats.gptc;
3038         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3039         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3040         adapter->net_stats.multicast = adapter->stats.mprc;
3041         adapter->net_stats.collisions = adapter->stats.colc;
3042
3043         /* Rx Errors */
3044
3045         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3046                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3047                 adapter->stats.rlec + adapter->stats.mpc +
3048                 adapter->stats.cexterr;
3049         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3050         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3051         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3052         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
3053         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3054
3055         /* Tx Errors */
3056
3057         adapter->net_stats.tx_errors = adapter->stats.ecol +
3058                                        adapter->stats.latecol;
3059         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3060         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3061         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3062
3063         /* Tx Dropped needs to be maintained elsewhere */
3064
3065         /* Phy Stats */
3066
3067         if(hw->media_type == e1000_media_type_copper) {
3068                 if((adapter->link_speed == SPEED_1000) &&
3069                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3070                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3071                         adapter->phy_stats.idle_errors += phy_tmp;
3072                 }
3073
3074                 if((hw->mac_type <= e1000_82546) &&
3075                    (hw->phy_type == e1000_phy_m88) &&
3076                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3077                         adapter->phy_stats.receive_errors += phy_tmp;
3078         }
3079
3080         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3081 }
3082
3083 #ifdef CONFIG_E1000_MQ
3084 void
3085 e1000_rx_schedule(void *data)
3086 {
3087         struct net_device *poll_dev, *netdev = data;
3088         struct e1000_adapter *adapter = netdev->priv;
3089         int this_cpu = get_cpu();
3090
3091         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3092         if (poll_dev == NULL) {
3093                 put_cpu();
3094                 return;
3095         }
3096
3097         if (likely(netif_rx_schedule_prep(poll_dev)))
3098                 __netif_rx_schedule(poll_dev);
3099         else
3100                 e1000_irq_enable(adapter);
3101
3102         put_cpu();
3103 }
3104 #endif
3105
3106 /**
3107  * e1000_intr - Interrupt Handler
3108  * @irq: interrupt number
3109  * @data: pointer to a network interface device structure
3110  * @pt_regs: CPU registers structure
3111  **/
3112
3113 static irqreturn_t
3114 e1000_intr(int irq, void *data, struct pt_regs *regs)
3115 {
3116         struct net_device *netdev = data;
3117         struct e1000_adapter *adapter = netdev_priv(netdev);
3118         struct e1000_hw *hw = &adapter->hw;
3119         uint32_t icr = E1000_READ_REG(hw, ICR);
3120 #if defined(CONFIG_E1000_NAPI) && defined(CONFIG_E1000_MQ) || !defined(CONFIG_E1000_NAPI)
3121         int i;
3122 #endif
3123
3124         if(unlikely(!icr))
3125                 return IRQ_NONE;  /* Not our interrupt */
3126
3127         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3128                 hw->get_link_status = 1;
3129                 mod_timer(&adapter->watchdog_timer, jiffies);
3130         }
3131
3132 #ifdef CONFIG_E1000_NAPI
3133         atomic_inc(&adapter->irq_sem);
3134         E1000_WRITE_REG(hw, IMC, ~0);
3135         E1000_WRITE_FLUSH(hw);
3136 #ifdef CONFIG_E1000_MQ
3137         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3138                 cpu_set(adapter->cpu_for_queue[0],
3139                         adapter->rx_sched_call_data.cpumask);
3140                 for (i = 1; i < adapter->num_queues; i++) {
3141                         cpu_set(adapter->cpu_for_queue[i],
3142                                 adapter->rx_sched_call_data.cpumask);
3143                         atomic_inc(&adapter->irq_sem);
3144                 }
3145                 atomic_set(&adapter->rx_sched_call_data.count, i);
3146                 smp_call_async_mask(&adapter->rx_sched_call_data);
3147         } else {
3148                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3149         }
3150 #else /* if !CONFIG_E1000_MQ */
3151         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3152                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3153         else
3154                 e1000_irq_enable(adapter);
3155 #endif /* CONFIG_E1000_MQ */
3156
3157 #else /* if !CONFIG_E1000_NAPI */
3158         /* Writing IMC and IMS is needed for 82547.
3159            Due to Hub Link bus being occupied, an interrupt
3160            de-assertion message is not able to be sent.
3161            When an interrupt assertion message is generated later,
3162            two messages are re-ordered and sent out.
3163            That causes APIC to think 82547 is in de-assertion
3164            state, while 82547 is in assertion state, resulting
3165            in dead lock. Writing IMC forces 82547 into
3166            de-assertion state.
3167         */
3168         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3169                 atomic_inc(&adapter->irq_sem);
3170                 E1000_WRITE_REG(hw, IMC, ~0);
3171         }
3172
3173         for(i = 0; i < E1000_MAX_INTR; i++)
3174                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3175                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3176                         break;
3177
3178         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3179                 e1000_irq_enable(adapter);
3180
3181 #endif /* CONFIG_E1000_NAPI */
3182
3183         return IRQ_HANDLED;
3184 }
3185
3186 #ifdef CONFIG_E1000_NAPI
3187 /**
3188  * e1000_clean - NAPI Rx polling callback
3189  * @adapter: board private structure
3190  **/
3191
3192 static int
3193 e1000_clean(struct net_device *poll_dev, int *budget)
3194 {
3195         struct e1000_adapter *adapter;
3196         int work_to_do = min(*budget, poll_dev->quota);
3197         int tx_cleaned, i = 0, work_done = 0;
3198
3199         /* Must NOT use netdev_priv macro here. */
3200         adapter = poll_dev->priv;
3201
3202         /* Keep link state information with original netdev */
3203         if (!netif_carrier_ok(adapter->netdev))
3204                 goto quit_polling;
3205
3206         while (poll_dev != &adapter->polling_netdev[i]) {
3207                 i++;
3208                 if (unlikely(i == adapter->num_queues))
3209                         BUG();
3210         }
3211
3212         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3213         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3214                           &work_done, work_to_do);
3215
3216         *budget -= work_done;
3217         poll_dev->quota -= work_done;
3218
3219         /* If no Tx and not enough Rx work done, exit the polling mode */
3220         if((!tx_cleaned && (work_done == 0)) ||
3221            !netif_running(adapter->netdev)) {
3222 quit_polling:
3223                 netif_rx_complete(poll_dev);
3224                 e1000_irq_enable(adapter);
3225                 return 0;
3226         }
3227
3228         return 1;
3229 }
3230
3231 #endif
3232 /**
3233  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3234  * @adapter: board private structure
3235  **/
3236
3237 static boolean_t
3238 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3239                    struct e1000_tx_ring *tx_ring)
3240 {
3241         struct net_device *netdev = adapter->netdev;
3242         struct e1000_tx_desc *tx_desc, *eop_desc;
3243         struct e1000_buffer *buffer_info;
3244         unsigned int i, eop;
3245         boolean_t cleaned = FALSE;
3246
3247         i = tx_ring->next_to_clean;
3248         eop = tx_ring->buffer_info[i].next_to_watch;
3249         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3250
3251         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3252                 for(cleaned = FALSE; !cleaned; ) {
3253                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3254                         buffer_info = &tx_ring->buffer_info[i];
3255                         cleaned = (i == eop);
3256
3257                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3258
3259                         tx_desc->buffer_addr = 0;
3260                         tx_desc->lower.data = 0;
3261                         tx_desc->upper.data = 0;
3262
3263                         if(unlikely(++i == tx_ring->count)) i = 0;
3264                 }
3265
3266                 eop = tx_ring->buffer_info[i].next_to_watch;
3267                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3268         }
3269
3270         tx_ring->next_to_clean = i;
3271
3272         spin_lock(&tx_ring->tx_lock);
3273
3274         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3275                     netif_carrier_ok(netdev)))
3276                 netif_wake_queue(netdev);
3277
3278         spin_unlock(&tx_ring->tx_lock);
3279
3280         if (adapter->detect_tx_hung) {
3281                 /* Detect a transmit hang in hardware, this serializes the
3282                  * check with the clearing of time_stamp and movement of i */
3283                 adapter->detect_tx_hung = FALSE;
3284                 if (tx_ring->buffer_info[i].dma &&
3285                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
3286                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3287                         E1000_STATUS_TXOFF)) {
3288
3289                         /* detected Tx unit hang */
3290                         i = tx_ring->next_to_clean;
3291                         eop = tx_ring->buffer_info[i].next_to_watch;
3292                         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3293                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3294                                         "  TDH                  <%x>\n"
3295                                         "  TDT                  <%x>\n"
3296                                         "  next_to_use          <%x>\n"
3297                                         "  next_to_clean        <%x>\n"
3298                                         "buffer_info[next_to_clean]\n"
3299                                         "  dma                  <%llx>\n"
3300                                         "  time_stamp           <%lx>\n"
3301                                         "  next_to_watch        <%x>\n"
3302                                         "  jiffies              <%lx>\n"
3303                                         "  next_to_watch.status <%x>\n",
3304                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3305                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3306                                 tx_ring->next_to_use,
3307                                 i,
3308                                 (unsigned long long)tx_ring->buffer_info[i].dma,
3309                                 tx_ring->buffer_info[i].time_stamp,
3310                                 eop,
3311                                 jiffies,
3312                                 eop_desc->upper.fields.status);
3313                         netif_stop_queue(netdev);
3314                 }
3315         }
3316         return cleaned;
3317 }
3318
3319 /**
3320  * e1000_rx_checksum - Receive Checksum Offload for 82543
3321  * @adapter:     board private structure
3322  * @status_err:  receive descriptor status and error fields
3323  * @csum:        receive descriptor csum field
3324  * @sk_buff:     socket buffer with received data
3325  **/
3326
3327 static inline void
3328 e1000_rx_checksum(struct e1000_adapter *adapter,
3329                   uint32_t status_err, uint32_t csum,
3330                   struct sk_buff *skb)
3331 {
3332         uint16_t status = (uint16_t)status_err;
3333         uint8_t errors = (uint8_t)(status_err >> 24);
3334         skb->ip_summed = CHECKSUM_NONE;
3335
3336         /* 82543 or newer only */
3337         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3338         /* Ignore Checksum bit is set */
3339         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3340         /* TCP/UDP checksum error bit is set */
3341         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3342                 /* let the stack verify checksum errors */
3343                 adapter->hw_csum_err++;
3344                 return;
3345         }
3346         /* TCP/UDP Checksum has not been calculated */
3347         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3348                 if(!(status & E1000_RXD_STAT_TCPCS))
3349                         return;
3350         } else {
3351                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3352                         return;
3353         }
3354         /* It must be a TCP or UDP packet with a valid checksum */
3355         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3356                 /* TCP checksum is good */
3357                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3358         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3359                 /* IP fragment with UDP payload */
3360                 /* Hardware complements the payload checksum, so we undo it
3361                  * and then put the value in host order for further stack use.
3362                  */
3363                 csum = ntohl(csum ^ 0xFFFF);
3364                 skb->csum = csum;
3365                 skb->ip_summed = CHECKSUM_HW;
3366         }
3367         adapter->hw_csum_good++;
3368 }
3369
3370 /**
3371  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3372  * @adapter: board private structure
3373  **/
3374
3375 static boolean_t
3376 #ifdef CONFIG_E1000_NAPI
3377 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3378                    struct e1000_rx_ring *rx_ring,
3379                    int *work_done, int work_to_do)
3380 #else
3381 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3382                    struct e1000_rx_ring *rx_ring)
3383 #endif
3384 {
3385         struct net_device *netdev = adapter->netdev;
3386         struct pci_dev *pdev = adapter->pdev;
3387         struct e1000_rx_desc *rx_desc;
3388         struct e1000_buffer *buffer_info;
3389         struct sk_buff *skb;
3390         unsigned long flags;
3391         uint32_t length;
3392         uint8_t last_byte;
3393         unsigned int i;
3394         boolean_t cleaned = FALSE;
3395
3396         i = rx_ring->next_to_clean;
3397         rx_desc = E1000_RX_DESC(*rx_ring, i);
3398
3399         while(rx_desc->status & E1000_RXD_STAT_DD) {
3400                 buffer_info = &rx_ring->buffer_info[i];
3401 #ifdef CONFIG_E1000_NAPI
3402                 if(*work_done >= work_to_do)
3403                         break;
3404                 (*work_done)++;
3405 #endif
3406                 cleaned = TRUE;
3407
3408                 pci_unmap_single(pdev,
3409                                  buffer_info->dma,
3410                                  buffer_info->length,
3411                                  PCI_DMA_FROMDEVICE);
3412
3413                 skb = buffer_info->skb;
3414                 length = le16_to_cpu(rx_desc->length);
3415
3416                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3417                         /* All receives must fit into a single buffer */
3418                         E1000_DBG("%s: Receive packet consumed multiple"
3419                                   " buffers\n", netdev->name);
3420                         dev_kfree_skb_irq(skb);
3421                         goto next_desc;
3422                 }
3423
3424                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3425                         last_byte = *(skb->data + length - 1);
3426                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3427                                       rx_desc->errors, length, last_byte)) {
3428                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3429                                 e1000_tbi_adjust_stats(&adapter->hw,
3430                                                        &adapter->stats,
3431                                                        length, skb->data);
3432                                 spin_unlock_irqrestore(&adapter->stats_lock,
3433                                                        flags);
3434                                 length--;
3435                         } else {
3436                                 dev_kfree_skb_irq(skb);
3437                                 goto next_desc;
3438                         }
3439                 }
3440
3441                 /* Good Receive */
3442                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3443
3444                 /* Receive Checksum Offload */
3445                 e1000_rx_checksum(adapter,
3446                                   (uint32_t)(rx_desc->status) |
3447                                   ((uint32_t)(rx_desc->errors) << 24),
3448                                   rx_desc->csum, skb);
3449                 skb->protocol = eth_type_trans(skb, netdev);
3450 #ifdef CONFIG_E1000_NAPI
3451                 if(unlikely(adapter->vlgrp &&
3452                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3453                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3454                                                  le16_to_cpu(rx_desc->special) &
3455                                                  E1000_RXD_SPC_VLAN_MASK);
3456                 } else {
3457                         netif_receive_skb(skb);
3458                 }
3459 #else /* CONFIG_E1000_NAPI */
3460                 if(unlikely(adapter->vlgrp &&
3461                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3462                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3463                                         le16_to_cpu(rx_desc->special) &
3464                                         E1000_RXD_SPC_VLAN_MASK);
3465                 } else {
3466                         netif_rx(skb);
3467                 }
3468 #endif /* CONFIG_E1000_NAPI */
3469                 netdev->last_rx = jiffies;
3470
3471 next_desc:
3472                 rx_desc->status = 0;
3473                 buffer_info->skb = NULL;
3474                 if(unlikely(++i == rx_ring->count)) i = 0;
3475
3476                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3477         }
3478         rx_ring->next_to_clean = i;
3479         adapter->alloc_rx_buf(adapter, rx_ring);
3480
3481         return cleaned;
3482 }
3483
3484 /**
3485  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3486  * @adapter: board private structure
3487  **/
3488
3489 static boolean_t
3490 #ifdef CONFIG_E1000_NAPI
3491 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3492                       struct e1000_rx_ring *rx_ring,
3493                       int *work_done, int work_to_do)
3494 #else
3495 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3496                       struct e1000_rx_ring *rx_ring)
3497 #endif
3498 {
3499         union e1000_rx_desc_packet_split *rx_desc;
3500         struct net_device *netdev = adapter->netdev;
3501         struct pci_dev *pdev = adapter->pdev;
3502         struct e1000_buffer *buffer_info;
3503         struct e1000_ps_page *ps_page;
3504         struct e1000_ps_page_dma *ps_page_dma;
3505         struct sk_buff *skb;
3506         unsigned int i, j;
3507         uint32_t length, staterr;
3508         boolean_t cleaned = FALSE;
3509
3510         i = rx_ring->next_to_clean;
3511         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3512         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3513
3514         while(staterr & E1000_RXD_STAT_DD) {
3515                 buffer_info = &rx_ring->buffer_info[i];
3516                 ps_page = &rx_ring->ps_page[i];
3517                 ps_page_dma = &rx_ring->ps_page_dma[i];
3518 #ifdef CONFIG_E1000_NAPI
3519                 if(unlikely(*work_done >= work_to_do))
3520                         break;
3521                 (*work_done)++;
3522 #endif
3523                 cleaned = TRUE;
3524                 pci_unmap_single(pdev, buffer_info->dma,
3525                                  buffer_info->length,
3526                                  PCI_DMA_FROMDEVICE);
3527
3528                 skb = buffer_info->skb;
3529
3530                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3531                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3532                                   " the full packet\n", netdev->name);
3533                         dev_kfree_skb_irq(skb);
3534                         goto next_desc;
3535                 }
3536
3537                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3538                         dev_kfree_skb_irq(skb);
3539                         goto next_desc;
3540                 }
3541
3542                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3543
3544                 if(unlikely(!length)) {
3545                         E1000_DBG("%s: Last part of the packet spanning"
3546                                   " multiple descriptors\n", netdev->name);
3547                         dev_kfree_skb_irq(skb);
3548                         goto next_desc;
3549                 }
3550
3551                 /* Good Receive */
3552                 skb_put(skb, length);
3553
3554                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3555                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3556                                 break;
3557
3558                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3559                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3560                         ps_page_dma->ps_page_dma[j] = 0;
3561                         skb_shinfo(skb)->frags[j].page =
3562                                 ps_page->ps_page[j];
3563                         ps_page->ps_page[j] = NULL;
3564                         skb_shinfo(skb)->frags[j].page_offset = 0;
3565                         skb_shinfo(skb)->frags[j].size = length;
3566                         skb_shinfo(skb)->nr_frags++;
3567                         skb->len += length;
3568                         skb->data_len += length;
3569                 }
3570
3571                 e1000_rx_checksum(adapter, staterr,
3572                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3573                 skb->protocol = eth_type_trans(skb, netdev);
3574
3575                 if(likely(rx_desc->wb.upper.header_status &
3576                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3577                         adapter->rx_hdr_split++;
3578 #ifdef HAVE_RX_ZERO_COPY
3579                         skb_shinfo(skb)->zero_copy = TRUE;
3580 #endif
3581                 }
3582 #ifdef CONFIG_E1000_NAPI
3583                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3584                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3585                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3586                                 E1000_RXD_SPC_VLAN_MASK);
3587                 } else {
3588                         netif_receive_skb(skb);
3589                 }
3590 #else /* CONFIG_E1000_NAPI */
3591                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3592                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3593                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3594                                 E1000_RXD_SPC_VLAN_MASK);
3595                 } else {
3596                         netif_rx(skb);
3597                 }
3598 #endif /* CONFIG_E1000_NAPI */
3599                 netdev->last_rx = jiffies;
3600
3601 next_desc:
3602                 rx_desc->wb.middle.status_error &= ~0xFF;
3603                 buffer_info->skb = NULL;
3604                 if(unlikely(++i == rx_ring->count)) i = 0;
3605
3606                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3607                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3608         }
3609         rx_ring->next_to_clean = i;
3610         adapter->alloc_rx_buf(adapter, rx_ring);
3611
3612         return cleaned;
3613 }
3614
3615 /**
3616  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3617  * @adapter: address of board private structure
3618  **/
3619
3620 static void
3621 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3622                        struct e1000_rx_ring *rx_ring)
3623 {
3624         struct net_device *netdev = adapter->netdev;
3625         struct pci_dev *pdev = adapter->pdev;
3626         struct e1000_rx_desc *rx_desc;
3627         struct e1000_buffer *buffer_info;
3628         struct sk_buff *skb;
3629         unsigned int i;
3630         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3631
3632         i = rx_ring->next_to_use;
3633         buffer_info = &rx_ring->buffer_info[i];
3634
3635         while(!buffer_info->skb) {
3636                 skb = dev_alloc_skb(bufsz);
3637
3638                 if(unlikely(!skb)) {
3639                         /* Better luck next round */
3640                         break;
3641                 }
3642
3643                 /* Fix for errata 23, can't cross 64kB boundary */
3644                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3645                         struct sk_buff *oldskb = skb;
3646                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3647                                              "at %p\n", bufsz, skb->data);
3648                         /* Try again, without freeing the previous */
3649                         skb = dev_alloc_skb(bufsz);
3650                         /* Failed allocation, critical failure */
3651                         if (!skb) {
3652                                 dev_kfree_skb(oldskb);
3653                                 break;
3654                         }
3655
3656                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3657                                 /* give up */
3658                                 dev_kfree_skb(skb);
3659                                 dev_kfree_skb(oldskb);
3660                                 break; /* while !buffer_info->skb */
3661                         } else {
3662                                 /* Use new allocation */
3663                                 dev_kfree_skb(oldskb);
3664                         }
3665                 }
3666                 /* Make buffer alignment 2 beyond a 16 byte boundary
3667                  * this will result in a 16 byte aligned IP header after
3668                  * the 14 byte MAC header is removed
3669                  */
3670                 skb_reserve(skb, NET_IP_ALIGN);
3671
3672                 skb->dev = netdev;
3673
3674                 buffer_info->skb = skb;
3675                 buffer_info->length = adapter->rx_buffer_len;
3676                 buffer_info->dma = pci_map_single(pdev,
3677                                                   skb->data,
3678                                                   adapter->rx_buffer_len,
3679                                                   PCI_DMA_FROMDEVICE);
3680
3681                 /* Fix for errata 23, can't cross 64kB boundary */
3682                 if (!e1000_check_64k_bound(adapter,
3683                                         (void *)(unsigned long)buffer_info->dma,
3684                                         adapter->rx_buffer_len)) {
3685                         DPRINTK(RX_ERR, ERR,
3686                                 "dma align check failed: %u bytes at %p\n",
3687                                 adapter->rx_buffer_len,
3688                                 (void *)(unsigned long)buffer_info->dma);
3689                         dev_kfree_skb(skb);
3690                         buffer_info->skb = NULL;
3691
3692                         pci_unmap_single(pdev, buffer_info->dma,
3693                                          adapter->rx_buffer_len,
3694                                          PCI_DMA_FROMDEVICE);
3695
3696                         break; /* while !buffer_info->skb */
3697                 }
3698                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3699                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3700
3701                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3702                         /* Force memory writes to complete before letting h/w
3703                          * know there are new descriptors to fetch.  (Only
3704                          * applicable for weak-ordered memory model archs,
3705                          * such as IA-64). */
3706                         wmb();
3707                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3708                 }
3709
3710                 if(unlikely(++i == rx_ring->count)) i = 0;
3711                 buffer_info = &rx_ring->buffer_info[i];
3712         }
3713
3714         rx_ring->next_to_use = i;
3715 }
3716
3717 /**
3718  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3719  * @adapter: address of board private structure
3720  **/
3721
3722 static void
3723 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3724                           struct e1000_rx_ring *rx_ring)
3725 {
3726         struct net_device *netdev = adapter->netdev;
3727         struct pci_dev *pdev = adapter->pdev;
3728         union e1000_rx_desc_packet_split *rx_desc;
3729         struct e1000_buffer *buffer_info;
3730         struct e1000_ps_page *ps_page;
3731         struct e1000_ps_page_dma *ps_page_dma;
3732         struct sk_buff *skb;
3733         unsigned int i, j;
3734
3735         i = rx_ring->next_to_use;
3736         buffer_info = &rx_ring->buffer_info[i];
3737         ps_page = &rx_ring->ps_page[i];
3738         ps_page_dma = &rx_ring->ps_page_dma[i];
3739
3740         while(!buffer_info->skb) {
3741                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3742
3743                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3744                         if (j < adapter->rx_ps_pages) {
3745                                 if (likely(!ps_page->ps_page[j])) {
3746                                         ps_page->ps_page[j] =
3747                                                 alloc_page(GFP_ATOMIC);
3748                                         if (unlikely(!ps_page->ps_page[j]))
3749                                                 goto no_buffers;
3750                                         ps_page_dma->ps_page_dma[j] =
3751                                                 pci_map_page(pdev,
3752                                                             ps_page->ps_page[j],
3753                                                             0, PAGE_SIZE,
3754                                                             PCI_DMA_FROMDEVICE);
3755                                 }
3756                                 /* Refresh the desc even if buffer_addrs didn't
3757                                  * change because each write-back erases
3758                                  * this info.
3759                                  */
3760                                 rx_desc->read.buffer_addr[j+1] =
3761                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3762                         } else
3763                                 rx_desc->read.buffer_addr[j+1] = ~0;
3764                 }
3765
3766                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3767
3768                 if(unlikely(!skb))
3769                         break;
3770
3771                 /* Make buffer alignment 2 beyond a 16 byte boundary
3772                  * this will result in a 16 byte aligned IP header after
3773                  * the 14 byte MAC header is removed
3774                  */
3775                 skb_reserve(skb, NET_IP_ALIGN);
3776
3777                 skb->dev = netdev;
3778
3779                 buffer_info->skb = skb;
3780                 buffer_info->length = adapter->rx_ps_bsize0;
3781                 buffer_info->dma = pci_map_single(pdev, skb->data,
3782                                                   adapter->rx_ps_bsize0,
3783                                                   PCI_DMA_FROMDEVICE);
3784
3785                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3786
3787                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3788                         /* Force memory writes to complete before letting h/w
3789                          * know there are new descriptors to fetch.  (Only
3790                          * applicable for weak-ordered memory model archs,
3791                          * such as IA-64). */
3792                         wmb();
3793                         /* Hardware increments by 16 bytes, but packet split
3794                          * descriptors are 32 bytes...so we increment tail
3795                          * twice as much.
3796                          */
3797                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3798                 }
3799
3800                 if(unlikely(++i == rx_ring->count)) i = 0;
3801                 buffer_info = &rx_ring->buffer_info[i];
3802                 ps_page = &rx_ring->ps_page[i];
3803                 ps_page_dma = &rx_ring->ps_page_dma[i];
3804         }
3805
3806 no_buffers:
3807         rx_ring->next_to_use = i;
3808 }
3809
3810 /**
3811  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3812  * @adapter:
3813  **/
3814
3815 static void
3816 e1000_smartspeed(struct e1000_adapter *adapter)
3817 {
3818         uint16_t phy_status;
3819         uint16_t phy_ctrl;
3820
3821         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3822            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3823                 return;
3824
3825         if(adapter->smartspeed == 0) {
3826                 /* If Master/Slave config fault is asserted twice,
3827                  * we assume back-to-back */
3828                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3829                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3830                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3831                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3832                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3833                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3834                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3835                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3836                                             phy_ctrl);
3837                         adapter->smartspeed++;
3838                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3839                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3840                                                &phy_ctrl)) {
3841                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3842                                              MII_CR_RESTART_AUTO_NEG);
3843                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3844                                                     phy_ctrl);
3845                         }
3846                 }
3847                 return;
3848         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
3849                 /* If still no link, perhaps using 2/3 pair cable */
3850                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3851                 phy_ctrl |= CR_1000T_MS_ENABLE;
3852                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
3853                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3854                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
3855                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3856                                      MII_CR_RESTART_AUTO_NEG);
3857                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
3858                 }
3859         }
3860         /* Restart process after E1000_SMARTSPEED_MAX iterations */
3861         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
3862                 adapter->smartspeed = 0;
3863 }
3864
3865 /**
3866  * e1000_ioctl -
3867  * @netdev:
3868  * @ifreq:
3869  * @cmd:
3870  **/
3871
3872 static int
3873 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3874 {
3875         switch (cmd) {
3876         case SIOCGMIIPHY:
3877         case SIOCGMIIREG:
3878         case SIOCSMIIREG:
3879                 return e1000_mii_ioctl(netdev, ifr, cmd);
3880         default:
3881                 return -EOPNOTSUPP;
3882         }
3883 }
3884
3885 /**
3886  * e1000_mii_ioctl -
3887  * @netdev:
3888  * @ifreq:
3889  * @cmd:
3890  **/
3891
3892 static int
3893 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3894 {
3895         struct e1000_adapter *adapter = netdev_priv(netdev);
3896         struct mii_ioctl_data *data = if_mii(ifr);
3897         int retval;
3898         uint16_t mii_reg;
3899         uint16_t spddplx;
3900         unsigned long flags;
3901
3902         if(adapter->hw.media_type != e1000_media_type_copper)
3903                 return -EOPNOTSUPP;
3904
3905         switch (cmd) {
3906         case SIOCGMIIPHY:
3907                 data->phy_id = adapter->hw.phy_addr;
3908                 break;
3909         case SIOCGMIIREG:
3910                 if(!capable(CAP_NET_ADMIN))
3911                         return -EPERM;
3912                 spin_lock_irqsave(&adapter->stats_lock, flags);
3913                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
3914                                    &data->val_out)) {
3915                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3916                         return -EIO;
3917                 }
3918                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3919                 break;
3920         case SIOCSMIIREG:
3921                 if(!capable(CAP_NET_ADMIN))
3922                         return -EPERM;
3923                 if(data->reg_num & ~(0x1F))
3924                         return -EFAULT;
3925                 mii_reg = data->val_in;
3926                 spin_lock_irqsave(&adapter->stats_lock, flags);
3927                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
3928                                         mii_reg)) {
3929                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3930                         return -EIO;
3931                 }
3932                 if(adapter->hw.phy_type == e1000_phy_m88) {
3933                         switch (data->reg_num) {
3934                         case PHY_CTRL:
3935                                 if(mii_reg & MII_CR_POWER_DOWN)
3936                                         break;
3937                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
3938                                         adapter->hw.autoneg = 1;
3939                                         adapter->hw.autoneg_advertised = 0x2F;
3940                                 } else {
3941                                         if (mii_reg & 0x40)
3942                                                 spddplx = SPEED_1000;
3943                                         else if (mii_reg & 0x2000)
3944                                                 spddplx = SPEED_100;
3945                                         else
3946                                                 spddplx = SPEED_10;
3947                                         spddplx += (mii_reg & 0x100)
3948                                                    ? FULL_DUPLEX :
3949                                                    HALF_DUPLEX;
3950                                         retval = e1000_set_spd_dplx(adapter,
3951                                                                     spddplx);
3952                                         if(retval) {
3953                                                 spin_unlock_irqrestore(
3954                                                         &adapter->stats_lock,
3955                                                         flags);
3956                                                 return retval;
3957                                         }
3958                                 }
3959                                 if(netif_running(adapter->netdev)) {
3960                                         e1000_down(adapter);
3961                                         e1000_up(adapter);
3962                                 } else
3963                                         e1000_reset(adapter);
3964                                 break;
3965                         case M88E1000_PHY_SPEC_CTRL:
3966                         case M88E1000_EXT_PHY_SPEC_CTRL:
3967                                 if(e1000_phy_reset(&adapter->hw)) {
3968                                         spin_unlock_irqrestore(
3969                                                 &adapter->stats_lock, flags);
3970                                         return -EIO;
3971                                 }
3972                                 break;
3973                         }
3974                 } else {
3975                         switch (data->reg_num) {
3976                         case PHY_CTRL:
3977                                 if(mii_reg & MII_CR_POWER_DOWN)
3978                                         break;
3979                                 if(netif_running(adapter->netdev)) {
3980                                         e1000_down(adapter);
3981                                         e1000_up(adapter);
3982                                 } else
3983                                         e1000_reset(adapter);
3984                                 break;
3985                         }
3986                 }
3987                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3988                 break;
3989         default:
3990                 return -EOPNOTSUPP;
3991         }
3992         return E1000_SUCCESS;
3993 }
3994
3995 void
3996 e1000_pci_set_mwi(struct e1000_hw *hw)
3997 {
3998         struct e1000_adapter *adapter = hw->back;
3999         int ret_val = pci_set_mwi(adapter->pdev);
4000
4001         if(ret_val)
4002                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4003 }
4004
4005 void
4006 e1000_pci_clear_mwi(struct e1000_hw *hw)
4007 {
4008         struct e1000_adapter *adapter = hw->back;
4009
4010         pci_clear_mwi(adapter->pdev);
4011 }
4012
4013 void
4014 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4015 {
4016         struct e1000_adapter *adapter = hw->back;
4017
4018         pci_read_config_word(adapter->pdev, reg, value);
4019 }
4020
4021 void
4022 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4023 {
4024         struct e1000_adapter *adapter = hw->back;
4025
4026         pci_write_config_word(adapter->pdev, reg, *value);
4027 }
4028
4029 uint32_t
4030 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4031 {
4032         return inl(port);
4033 }
4034
4035 void
4036 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4037 {
4038         outl(value, port);
4039 }
4040
4041 static void
4042 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4043 {
4044         struct e1000_adapter *adapter = netdev_priv(netdev);
4045         uint32_t ctrl, rctl;
4046
4047         e1000_irq_disable(adapter);
4048         adapter->vlgrp = grp;
4049
4050         if(grp) {
4051                 /* enable VLAN tag insert/strip */
4052                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4053                 ctrl |= E1000_CTRL_VME;
4054                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4055
4056                 /* enable VLAN receive filtering */
4057                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4058                 rctl |= E1000_RCTL_VFE;
4059                 rctl &= ~E1000_RCTL_CFIEN;
4060                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4061                 e1000_update_mng_vlan(adapter);
4062         } else {
4063                 /* disable VLAN tag insert/strip */
4064                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4065                 ctrl &= ~E1000_CTRL_VME;
4066                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4067
4068                 /* disable VLAN filtering */
4069                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4070                 rctl &= ~E1000_RCTL_VFE;
4071                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4072                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4073                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4074                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4075                 }
4076         }
4077
4078         e1000_irq_enable(adapter);
4079 }
4080
4081 static void
4082 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4083 {
4084         struct e1000_adapter *adapter = netdev_priv(netdev);
4085         uint32_t vfta, index;
4086         if((adapter->hw.mng_cookie.status &
4087                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4088                 (vid == adapter->mng_vlan_id))
4089                 return;
4090         /* add VID to filter table */
4091         index = (vid >> 5) & 0x7F;
4092         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4093         vfta |= (1 << (vid & 0x1F));
4094         e1000_write_vfta(&adapter->hw, index, vfta);
4095 }
4096
4097 static void
4098 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4099 {
4100         struct e1000_adapter *adapter = netdev_priv(netdev);
4101         uint32_t vfta, index;
4102
4103         e1000_irq_disable(adapter);
4104
4105         if(adapter->vlgrp)
4106                 adapter->vlgrp->vlan_devices[vid] = NULL;
4107
4108         e1000_irq_enable(adapter);
4109
4110         if((adapter->hw.mng_cookie.status &
4111                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4112                 (vid == adapter->mng_vlan_id))
4113                 return;
4114         /* remove VID from filter table */
4115         index = (vid >> 5) & 0x7F;
4116         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4117         vfta &= ~(1 << (vid & 0x1F));
4118         e1000_write_vfta(&adapter->hw, index, vfta);
4119 }
4120
4121 static void
4122 e1000_restore_vlan(struct e1000_adapter *adapter)
4123 {
4124         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4125
4126         if(adapter->vlgrp) {
4127                 uint16_t vid;
4128                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4129                         if(!adapter->vlgrp->vlan_devices[vid])
4130                                 continue;
4131                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4132                 }
4133         }
4134 }
4135
4136 int
4137 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4138 {
4139         adapter->hw.autoneg = 0;
4140
4141         /* Fiber NICs only allow 1000 gbps Full duplex */
4142         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4143                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4144                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4145                 return -EINVAL;
4146         }
4147
4148         switch(spddplx) {
4149         case SPEED_10 + DUPLEX_HALF:
4150                 adapter->hw.forced_speed_duplex = e1000_10_half;
4151                 break;
4152         case SPEED_10 + DUPLEX_FULL:
4153                 adapter->hw.forced_speed_duplex = e1000_10_full;
4154                 break;
4155         case SPEED_100 + DUPLEX_HALF:
4156                 adapter->hw.forced_speed_duplex = e1000_100_half;
4157                 break;
4158         case SPEED_100 + DUPLEX_FULL:
4159                 adapter->hw.forced_speed_duplex = e1000_100_full;
4160                 break;
4161         case SPEED_1000 + DUPLEX_FULL:
4162                 adapter->hw.autoneg = 1;
4163                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4164                 break;
4165         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4166         default:
4167                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4168                 return -EINVAL;
4169         }
4170         return 0;
4171 }
4172
4173 #ifdef CONFIG_PM
4174 static int
4175 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4176 {
4177         struct net_device *netdev = pci_get_drvdata(pdev);
4178         struct e1000_adapter *adapter = netdev_priv(netdev);
4179         uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
4180         uint32_t wufc = adapter->wol;
4181
4182         netif_device_detach(netdev);
4183
4184         if(netif_running(netdev))
4185                 e1000_down(adapter);
4186
4187         status = E1000_READ_REG(&adapter->hw, STATUS);
4188         if(status & E1000_STATUS_LU)
4189                 wufc &= ~E1000_WUFC_LNKC;
4190
4191         if(wufc) {
4192                 e1000_setup_rctl(adapter);
4193                 e1000_set_multi(netdev);
4194
4195                 /* turn on all-multi mode if wake on multicast is enabled */
4196                 if(adapter->wol & E1000_WUFC_MC) {
4197                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4198                         rctl |= E1000_RCTL_MPE;
4199                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4200                 }
4201
4202                 if(adapter->hw.mac_type >= e1000_82540) {
4203                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4204                         /* advertise wake from D3Cold */
4205                         #define E1000_CTRL_ADVD3WUC 0x00100000
4206                         /* phy power management enable */
4207                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4208                         ctrl |= E1000_CTRL_ADVD3WUC |
4209                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4210                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4211                 }
4212
4213                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4214                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4215                         /* keep the laser running in D3 */
4216                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4217                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4218                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4219                 }
4220
4221                 /* Allow time for pending master requests to run */
4222                 e1000_disable_pciex_master(&adapter->hw);
4223
4224                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4225                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4226                 pci_enable_wake(pdev, 3, 1);
4227                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4228         } else {
4229                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4230                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4231                 pci_enable_wake(pdev, 3, 0);
4232                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4233         }
4234
4235         pci_save_state(pdev);
4236
4237         if(adapter->hw.mac_type >= e1000_82540 &&
4238            adapter->hw.media_type == e1000_media_type_copper) {
4239                 manc = E1000_READ_REG(&adapter->hw, MANC);
4240                 if(manc & E1000_MANC_SMBUS_EN) {
4241                         manc |= E1000_MANC_ARP_EN;
4242                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4243                         pci_enable_wake(pdev, 3, 1);
4244                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4245                 }
4246         }
4247
4248         switch(adapter->hw.mac_type) {
4249         case e1000_82571:
4250         case e1000_82572:
4251                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4252                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4253                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
4254                 break;
4255         case e1000_82573:
4256                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4257                 E1000_WRITE_REG(&adapter->hw, SWSM,
4258                                 swsm & ~E1000_SWSM_DRV_LOAD);
4259                 break;
4260         default:
4261                 break;
4262         }
4263
4264         pci_disable_device(pdev);
4265         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4266
4267         return 0;
4268 }
4269
4270 static int
4271 e1000_resume(struct pci_dev *pdev)
4272 {
4273         struct net_device *netdev = pci_get_drvdata(pdev);
4274         struct e1000_adapter *adapter = netdev_priv(netdev);
4275         uint32_t manc, ret_val, swsm;
4276         uint32_t ctrl_ext;
4277
4278         pci_set_power_state(pdev, PCI_D0);
4279         pci_restore_state(pdev);
4280         ret_val = pci_enable_device(pdev);
4281         pci_set_master(pdev);
4282
4283         pci_enable_wake(pdev, PCI_D3hot, 0);
4284         pci_enable_wake(pdev, PCI_D3cold, 0);
4285
4286         e1000_reset(adapter);
4287         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4288
4289         if(netif_running(netdev))
4290                 e1000_up(adapter);
4291
4292         netif_device_attach(netdev);
4293
4294         if(adapter->hw.mac_type >= e1000_82540 &&
4295            adapter->hw.media_type == e1000_media_type_copper) {
4296                 manc = E1000_READ_REG(&adapter->hw, MANC);
4297                 manc &= ~(E1000_MANC_ARP_EN);
4298                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4299         }
4300
4301         switch(adapter->hw.mac_type) {
4302         case e1000_82571:
4303         case e1000_82572:
4304                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4305                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4306                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
4307                 break;
4308         case e1000_82573:
4309                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4310                 E1000_WRITE_REG(&adapter->hw, SWSM,
4311                                 swsm | E1000_SWSM_DRV_LOAD);
4312                 break;
4313         default:
4314                 break;
4315         }
4316
4317         return 0;
4318 }
4319 #endif
4320 #ifdef CONFIG_NET_POLL_CONTROLLER
4321 /*
4322  * Polling 'interrupt' - used by things like netconsole to send skbs
4323  * without having to re-enable interrupts. It's not called while
4324  * the interrupt routine is executing.
4325  */
4326 static void
4327 e1000_netpoll(struct net_device *netdev)
4328 {
4329         struct e1000_adapter *adapter = netdev_priv(netdev);
4330         disable_irq(adapter->pdev->irq);
4331         e1000_intr(adapter->pdev->irq, netdev, NULL);
4332         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4333         enable_irq(adapter->pdev->irq);
4334 }
4335 #endif
4336
4337 /* e1000_main.c */