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 "6.1.16-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->rx_buffer_len > 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[0];
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         unsigned int i;
2318         uint32_t cmd_length = 0;
2319         uint16_t ipcse = 0, tucse, mss;
2320         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2321         int err;
2322
2323         if(skb_shinfo(skb)->tso_size) {
2324                 if (skb_header_cloned(skb)) {
2325                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2326                         if (err)
2327                                 return err;
2328                 }
2329
2330                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2331                 mss = skb_shinfo(skb)->tso_size;
2332                 if(skb->protocol == ntohs(ETH_P_IP)) {
2333                         skb->nh.iph->tot_len = 0;
2334                         skb->nh.iph->check = 0;
2335                         skb->h.th->check =
2336                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2337                                                    skb->nh.iph->daddr,
2338                                                    0,
2339                                                    IPPROTO_TCP,
2340                                                    0);
2341                         cmd_length = E1000_TXD_CMD_IP;
2342                         ipcse = skb->h.raw - skb->data - 1;
2343 #ifdef NETIF_F_TSO_IPV6
2344                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2345                         skb->nh.ipv6h->payload_len = 0;
2346                         skb->h.th->check =
2347                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2348                                                  &skb->nh.ipv6h->daddr,
2349                                                  0,
2350                                                  IPPROTO_TCP,
2351                                                  0);
2352                         ipcse = 0;
2353 #endif
2354                 }
2355                 ipcss = skb->nh.raw - skb->data;
2356                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2357                 tucss = skb->h.raw - skb->data;
2358                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2359                 tucse = 0;
2360
2361                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2362                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2363
2364                 i = tx_ring->next_to_use;
2365                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2366
2367                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2368                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2369                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2370                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2371                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2372                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2373                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2374                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2375                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2376
2377                 if (++i == tx_ring->count) i = 0;
2378                 tx_ring->next_to_use = i;
2379
2380                 return 1;
2381         }
2382 #endif
2383
2384         return 0;
2385 }
2386
2387 static inline boolean_t
2388 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2389               struct sk_buff *skb)
2390 {
2391         struct e1000_context_desc *context_desc;
2392         unsigned int i;
2393         uint8_t css;
2394
2395         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2396                 css = skb->h.raw - skb->data;
2397
2398                 i = tx_ring->next_to_use;
2399                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2400
2401                 context_desc->upper_setup.tcp_fields.tucss = css;
2402                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2403                 context_desc->upper_setup.tcp_fields.tucse = 0;
2404                 context_desc->tcp_seg_setup.data = 0;
2405                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2406
2407                 if (unlikely(++i == tx_ring->count)) i = 0;
2408                 tx_ring->next_to_use = i;
2409
2410                 return TRUE;
2411         }
2412
2413         return FALSE;
2414 }
2415
2416 #define E1000_MAX_TXD_PWR       12
2417 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2418
2419 static inline int
2420 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2421              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2422              unsigned int nr_frags, unsigned int mss)
2423 {
2424         struct e1000_buffer *buffer_info;
2425         unsigned int len = skb->len;
2426         unsigned int offset = 0, size, count = 0, i;
2427         unsigned int f;
2428         len -= skb->data_len;
2429
2430         i = tx_ring->next_to_use;
2431
2432         while(len) {
2433                 buffer_info = &tx_ring->buffer_info[i];
2434                 size = min(len, max_per_txd);
2435 #ifdef NETIF_F_TSO
2436                 /* Workaround for Controller erratum --
2437                  * descriptor for non-tso packet in a linear SKB that follows a
2438                  * tso gets written back prematurely before the data is fully
2439                  * DMAd to the controller */
2440                 if (!skb->data_len && tx_ring->last_tx_tso &&
2441                                 !skb_shinfo(skb)->tso_size) {
2442                         tx_ring->last_tx_tso = 0;
2443                         size -= 4;
2444                 }
2445
2446                 /* Workaround for premature desc write-backs
2447                  * in TSO mode.  Append 4-byte sentinel desc */
2448                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2449                         size -= 4;
2450 #endif
2451                 /* work-around for errata 10 and it applies
2452                  * to all controllers in PCI-X mode
2453                  * The fix is to make sure that the first descriptor of a
2454                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2455                  */
2456                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2457                                 (size > 2015) && count == 0))
2458                         size = 2015;
2459
2460                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2461                  * terminating buffers within evenly-aligned dwords. */
2462                 if(unlikely(adapter->pcix_82544 &&
2463                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2464                    size > 4))
2465                         size -= 4;
2466
2467                 buffer_info->length = size;
2468                 buffer_info->dma =
2469                         pci_map_single(adapter->pdev,
2470                                 skb->data + offset,
2471                                 size,
2472                                 PCI_DMA_TODEVICE);
2473                 buffer_info->time_stamp = jiffies;
2474
2475                 len -= size;
2476                 offset += size;
2477                 count++;
2478                 if(unlikely(++i == tx_ring->count)) i = 0;
2479         }
2480
2481         for(f = 0; f < nr_frags; f++) {
2482                 struct skb_frag_struct *frag;
2483
2484                 frag = &skb_shinfo(skb)->frags[f];
2485                 len = frag->size;
2486                 offset = frag->page_offset;
2487
2488                 while(len) {
2489                         buffer_info = &tx_ring->buffer_info[i];
2490                         size = min(len, max_per_txd);
2491 #ifdef NETIF_F_TSO
2492                         /* Workaround for premature desc write-backs
2493                          * in TSO mode.  Append 4-byte sentinel desc */
2494                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2495                                 size -= 4;
2496 #endif
2497                         /* Workaround for potential 82544 hang in PCI-X.
2498                          * Avoid terminating buffers within evenly-aligned
2499                          * dwords. */
2500                         if(unlikely(adapter->pcix_82544 &&
2501                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2502                            size > 4))
2503                                 size -= 4;
2504
2505                         buffer_info->length = size;
2506                         buffer_info->dma =
2507                                 pci_map_page(adapter->pdev,
2508                                         frag->page,
2509                                         offset,
2510                                         size,
2511                                         PCI_DMA_TODEVICE);
2512                         buffer_info->time_stamp = jiffies;
2513
2514                         len -= size;
2515                         offset += size;
2516                         count++;
2517                         if(unlikely(++i == tx_ring->count)) i = 0;
2518                 }
2519         }
2520
2521         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2522         tx_ring->buffer_info[i].skb = skb;
2523         tx_ring->buffer_info[first].next_to_watch = i;
2524
2525         return count;
2526 }
2527
2528 static inline void
2529 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2530                int tx_flags, int count)
2531 {
2532         struct e1000_tx_desc *tx_desc = NULL;
2533         struct e1000_buffer *buffer_info;
2534         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2535         unsigned int i;
2536
2537         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2538                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2539                              E1000_TXD_CMD_TSE;
2540                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2541
2542                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2543                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2544         }
2545
2546         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2547                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2548                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2549         }
2550
2551         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2552                 txd_lower |= E1000_TXD_CMD_VLE;
2553                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2554         }
2555
2556         i = tx_ring->next_to_use;
2557
2558         while(count--) {
2559                 buffer_info = &tx_ring->buffer_info[i];
2560                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2561                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2562                 tx_desc->lower.data =
2563                         cpu_to_le32(txd_lower | buffer_info->length);
2564                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2565                 if(unlikely(++i == tx_ring->count)) i = 0;
2566         }
2567
2568         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2569
2570         /* Force memory writes to complete before letting h/w
2571          * know there are new descriptors to fetch.  (Only
2572          * applicable for weak-ordered memory model archs,
2573          * such as IA-64). */
2574         wmb();
2575
2576         tx_ring->next_to_use = i;
2577         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2578 }
2579
2580 /**
2581  * 82547 workaround to avoid controller hang in half-duplex environment.
2582  * The workaround is to avoid queuing a large packet that would span
2583  * the internal Tx FIFO ring boundary by notifying the stack to resend
2584  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2585  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2586  * to the beginning of the Tx FIFO.
2587  **/
2588
2589 #define E1000_FIFO_HDR                  0x10
2590 #define E1000_82547_PAD_LEN             0x3E0
2591
2592 static inline int
2593 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2594 {
2595         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2596         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2597
2598         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2599
2600         if(adapter->link_duplex != HALF_DUPLEX)
2601                 goto no_fifo_stall_required;
2602
2603         if(atomic_read(&adapter->tx_fifo_stall))
2604                 return 1;
2605
2606         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2607                 atomic_set(&adapter->tx_fifo_stall, 1);
2608                 return 1;
2609         }
2610
2611 no_fifo_stall_required:
2612         adapter->tx_fifo_head += skb_fifo_len;
2613         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2614                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2615         return 0;
2616 }
2617
2618 #define MINIMUM_DHCP_PACKET_SIZE 282
2619 static inline int
2620 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2621 {
2622         struct e1000_hw *hw =  &adapter->hw;
2623         uint16_t length, offset;
2624         if(vlan_tx_tag_present(skb)) {
2625                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2626                         ( adapter->hw.mng_cookie.status &
2627                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2628                         return 0;
2629         }
2630         if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2631                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2632                 if((htons(ETH_P_IP) == eth->h_proto)) {
2633                         const struct iphdr *ip =
2634                                 (struct iphdr *)((uint8_t *)skb->data+14);
2635                         if(IPPROTO_UDP == ip->protocol) {
2636                                 struct udphdr *udp =
2637                                         (struct udphdr *)((uint8_t *)ip +
2638                                                 (ip->ihl << 2));
2639                                 if(ntohs(udp->dest) == 67) {
2640                                         offset = (uint8_t *)udp + 8 - skb->data;
2641                                         length = skb->len - offset;
2642
2643                                         return e1000_mng_write_dhcp_info(hw,
2644                                                         (uint8_t *)udp + 8,
2645                                                         length);
2646                                 }
2647                         }
2648                 }
2649         }
2650         return 0;
2651 }
2652
2653 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2654 static int
2655 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2656 {
2657         struct e1000_adapter *adapter = netdev_priv(netdev);
2658         struct e1000_tx_ring *tx_ring;
2659         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2660         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2661         unsigned int tx_flags = 0;
2662         unsigned int len = skb->len;
2663         unsigned long flags;
2664         unsigned int nr_frags = 0;
2665         unsigned int mss = 0;
2666         int count = 0;
2667         int tso;
2668         unsigned int f;
2669         len -= skb->data_len;
2670
2671 #ifdef CONFIG_E1000_MQ
2672         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2673 #else
2674         tx_ring = adapter->tx_ring;
2675 #endif
2676
2677         if (unlikely(skb->len <= 0)) {
2678                 dev_kfree_skb_any(skb);
2679                 return NETDEV_TX_OK;
2680         }
2681
2682 #ifdef NETIF_F_TSO
2683         mss = skb_shinfo(skb)->tso_size;
2684         /* The controller does a simple calculation to
2685          * make sure there is enough room in the FIFO before
2686          * initiating the DMA for each buffer.  The calc is:
2687          * 4 = ceil(buffer len/mss).  To make sure we don't
2688          * overrun the FIFO, adjust the max buffer len if mss
2689          * drops. */
2690         if(mss) {
2691                 max_per_txd = min(mss << 2, max_per_txd);
2692                 max_txd_pwr = fls(max_per_txd) - 1;
2693         }
2694
2695         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2696                 count++;
2697         count++;
2698 #else
2699         if(skb->ip_summed == CHECKSUM_HW)
2700                 count++;
2701 #endif
2702
2703 #ifdef NETIF_F_TSO
2704         /* Controller Erratum workaround */
2705         if (!skb->data_len && tx_ring->last_tx_tso &&
2706                 !skb_shinfo(skb)->tso_size)
2707                 count++;
2708 #endif
2709
2710         count += TXD_USE_COUNT(len, max_txd_pwr);
2711
2712         if(adapter->pcix_82544)
2713                 count++;
2714
2715         /* work-around for errata 10 and it applies to all controllers
2716          * in PCI-X mode, so add one more descriptor to the count
2717          */
2718         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2719                         (len > 2015)))
2720                 count++;
2721
2722         nr_frags = skb_shinfo(skb)->nr_frags;
2723         for(f = 0; f < nr_frags; f++)
2724                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2725                                        max_txd_pwr);
2726         if(adapter->pcix_82544)
2727                 count += nr_frags;
2728
2729 #ifdef NETIF_F_TSO
2730         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2731          * points to just header, pull a few bytes of payload from
2732          * frags into skb->data */
2733         if (skb_shinfo(skb)->tso_size) {
2734                 uint8_t hdr_len;
2735                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2736                 if (skb->data_len && (hdr_len < (skb->len - skb->data_len)) &&
2737                         (adapter->hw.mac_type == e1000_82571 ||
2738                         adapter->hw.mac_type == e1000_82572)) {
2739                         unsigned int pull_size;
2740                         pull_size = min((unsigned int)4, skb->data_len);
2741                         if (!__pskb_pull_tail(skb, pull_size)) {
2742                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2743                                 dev_kfree_skb_any(skb);
2744                                 return -EFAULT;
2745                         }
2746                 }
2747         }
2748 #endif
2749
2750         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2751                 e1000_transfer_dhcp_info(adapter, skb);
2752
2753         local_irq_save(flags);
2754         if (!spin_trylock(&tx_ring->tx_lock)) {
2755                 /* Collision - tell upper layer to requeue */
2756                 local_irq_restore(flags);
2757                 return NETDEV_TX_LOCKED;
2758         }
2759
2760         /* need: count + 2 desc gap to keep tail from touching
2761          * head, otherwise try next time */
2762         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2763                 netif_stop_queue(netdev);
2764                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2765                 return NETDEV_TX_BUSY;
2766         }
2767
2768         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2769                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2770                         netif_stop_queue(netdev);
2771                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2772                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2773                         return NETDEV_TX_BUSY;
2774                 }
2775         }
2776
2777         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2778                 tx_flags |= E1000_TX_FLAGS_VLAN;
2779                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2780         }
2781
2782         first = tx_ring->next_to_use;
2783
2784         tso = e1000_tso(adapter, tx_ring, skb);
2785         if (tso < 0) {
2786                 dev_kfree_skb_any(skb);
2787                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2788                 return NETDEV_TX_OK;
2789         }
2790
2791         if (likely(tso)) {
2792                 tx_ring->last_tx_tso = 1;
2793                 tx_flags |= E1000_TX_FLAGS_TSO;
2794         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2795                 tx_flags |= E1000_TX_FLAGS_CSUM;
2796
2797         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2798          * 82571 hardware supports TSO capabilities for IPv6 as well...
2799          * no longer assume, we must. */
2800         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2801                 tx_flags |= E1000_TX_FLAGS_IPV4;
2802
2803         e1000_tx_queue(adapter, tx_ring, tx_flags,
2804                        e1000_tx_map(adapter, tx_ring, skb, first,
2805                                     max_per_txd, nr_frags, mss));
2806
2807         netdev->trans_start = jiffies;
2808
2809         /* Make sure there is space in the ring for the next send. */
2810         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2811                 netif_stop_queue(netdev);
2812
2813         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2814         return NETDEV_TX_OK;
2815 }
2816
2817 /**
2818  * e1000_tx_timeout - Respond to a Tx Hang
2819  * @netdev: network interface device structure
2820  **/
2821
2822 static void
2823 e1000_tx_timeout(struct net_device *netdev)
2824 {
2825         struct e1000_adapter *adapter = netdev_priv(netdev);
2826
2827         /* Do the reset outside of interrupt context */
2828         schedule_work(&adapter->tx_timeout_task);
2829 }
2830
2831 static void
2832 e1000_tx_timeout_task(struct net_device *netdev)
2833 {
2834         struct e1000_adapter *adapter = netdev_priv(netdev);
2835
2836         e1000_down(adapter);
2837         e1000_up(adapter);
2838 }
2839
2840 /**
2841  * e1000_get_stats - Get System Network Statistics
2842  * @netdev: network interface device structure
2843  *
2844  * Returns the address of the device statistics structure.
2845  * The statistics are actually updated from the timer callback.
2846  **/
2847
2848 static struct net_device_stats *
2849 e1000_get_stats(struct net_device *netdev)
2850 {
2851         struct e1000_adapter *adapter = netdev_priv(netdev);
2852
2853         e1000_update_stats(adapter);
2854         return &adapter->net_stats;
2855 }
2856
2857 /**
2858  * e1000_change_mtu - Change the Maximum Transfer Unit
2859  * @netdev: network interface device structure
2860  * @new_mtu: new value for maximum frame size
2861  *
2862  * Returns 0 on success, negative on failure
2863  **/
2864
2865 static int
2866 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2867 {
2868         struct e1000_adapter *adapter = netdev_priv(netdev);
2869         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2870
2871         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2872                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2873                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2874                         return -EINVAL;
2875         }
2876
2877 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2878         /* might want this to be bigger enum check... */
2879         /* 82571 controllers limit jumbo frame size to 10500 bytes */
2880         if ((adapter->hw.mac_type == e1000_82571 ||
2881              adapter->hw.mac_type == e1000_82572) &&
2882             max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2883                 DPRINTK(PROBE, ERR, "MTU > 9216 bytes not supported "
2884                                     "on 82571 and 82572 controllers.\n");
2885                 return -EINVAL;
2886         }
2887
2888         if(adapter->hw.mac_type == e1000_82573 &&
2889             max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2890                 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2891                                     "on 82573\n");
2892                 return -EINVAL;
2893         }
2894
2895         if(adapter->hw.mac_type > e1000_82547_rev_2) {
2896                 adapter->rx_buffer_len = max_frame;
2897                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
2898         } else {
2899                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
2900                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
2901                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
2902                                             "on 82542\n");
2903                         return -EINVAL;
2904
2905                 } else {
2906                         if(max_frame <= E1000_RXBUFFER_2048) {
2907                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
2908                         } else if(max_frame <= E1000_RXBUFFER_4096) {
2909                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
2910                         } else if(max_frame <= E1000_RXBUFFER_8192) {
2911                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
2912                         } else if(max_frame <= E1000_RXBUFFER_16384) {
2913                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
2914                         }
2915                 }
2916         }
2917
2918         netdev->mtu = new_mtu;
2919
2920         if(netif_running(netdev)) {
2921                 e1000_down(adapter);
2922                 e1000_up(adapter);
2923         }
2924
2925         adapter->hw.max_frame_size = max_frame;
2926
2927         return 0;
2928 }
2929
2930 /**
2931  * e1000_update_stats - Update the board statistics counters
2932  * @adapter: board private structure
2933  **/
2934
2935 void
2936 e1000_update_stats(struct e1000_adapter *adapter)
2937 {
2938         struct e1000_hw *hw = &adapter->hw;
2939         unsigned long flags;
2940         uint16_t phy_tmp;
2941
2942 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2943
2944         spin_lock_irqsave(&adapter->stats_lock, flags);
2945
2946         /* these counters are modified from e1000_adjust_tbi_stats,
2947          * called from the interrupt context, so they must only
2948          * be written while holding adapter->stats_lock
2949          */
2950
2951         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
2952         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
2953         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
2954         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
2955         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
2956         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
2957         adapter->stats.roc += E1000_READ_REG(hw, ROC);
2958         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
2959         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
2960         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
2961         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
2962         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
2963         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
2964
2965         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
2966         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
2967         adapter->stats.scc += E1000_READ_REG(hw, SCC);
2968         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
2969         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
2970         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
2971         adapter->stats.dc += E1000_READ_REG(hw, DC);
2972         adapter->stats.sec += E1000_READ_REG(hw, SEC);
2973         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
2974         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
2975         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
2976         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
2977         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
2978         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
2979         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
2980         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
2981         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
2982         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
2983         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
2984         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
2985         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
2986         adapter->stats.torl += E1000_READ_REG(hw, TORL);
2987         adapter->stats.torh += E1000_READ_REG(hw, TORH);
2988         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
2989         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
2990         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
2991         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
2992         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
2993         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
2994         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
2995         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
2996         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
2997         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
2998         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
2999
3000         /* used for adaptive IFS */
3001
3002         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3003         adapter->stats.tpt += hw->tx_packet_delta;
3004         hw->collision_delta = E1000_READ_REG(hw, COLC);
3005         adapter->stats.colc += hw->collision_delta;
3006
3007         if(hw->mac_type >= e1000_82543) {
3008                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3009                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3010                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3011                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3012                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3013                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3014         }
3015         if(hw->mac_type > e1000_82547_rev_2) {
3016                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3017                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3018                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3019                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3020                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3021                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3022                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3023                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3024                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3025         }
3026
3027         /* Fill out the OS statistics structure */
3028
3029         adapter->net_stats.rx_packets = adapter->stats.gprc;
3030         adapter->net_stats.tx_packets = adapter->stats.gptc;
3031         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3032         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3033         adapter->net_stats.multicast = adapter->stats.mprc;
3034         adapter->net_stats.collisions = adapter->stats.colc;
3035
3036         /* Rx Errors */
3037
3038         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3039                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3040                 adapter->stats.rlec + adapter->stats.mpc +
3041                 adapter->stats.cexterr;
3042         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3043         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3044         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3045         adapter->net_stats.rx_fifo_errors = adapter->stats.mpc;
3046         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3047
3048         /* Tx Errors */
3049
3050         adapter->net_stats.tx_errors = adapter->stats.ecol +
3051                                        adapter->stats.latecol;
3052         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3053         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3054         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3055
3056         /* Tx Dropped needs to be maintained elsewhere */
3057
3058         /* Phy Stats */
3059
3060         if(hw->media_type == e1000_media_type_copper) {
3061                 if((adapter->link_speed == SPEED_1000) &&
3062                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3063                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3064                         adapter->phy_stats.idle_errors += phy_tmp;
3065                 }
3066
3067                 if((hw->mac_type <= e1000_82546) &&
3068                    (hw->phy_type == e1000_phy_m88) &&
3069                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3070                         adapter->phy_stats.receive_errors += phy_tmp;
3071         }
3072
3073         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3074 }
3075
3076 #ifdef CONFIG_E1000_MQ
3077 void
3078 e1000_rx_schedule(void *data)
3079 {
3080         struct net_device *poll_dev, *netdev = data;
3081         struct e1000_adapter *adapter = netdev->priv;
3082         int this_cpu = get_cpu();
3083
3084         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3085         if (poll_dev == NULL) {
3086                 put_cpu();
3087                 return;
3088         }
3089
3090         if (likely(netif_rx_schedule_prep(poll_dev)))
3091                 __netif_rx_schedule(poll_dev);
3092         else
3093                 e1000_irq_enable(adapter);
3094
3095         put_cpu();
3096 }
3097 #endif
3098
3099 /**
3100  * e1000_intr - Interrupt Handler
3101  * @irq: interrupt number
3102  * @data: pointer to a network interface device structure
3103  * @pt_regs: CPU registers structure
3104  **/
3105
3106 static irqreturn_t
3107 e1000_intr(int irq, void *data, struct pt_regs *regs)
3108 {
3109         struct net_device *netdev = data;
3110         struct e1000_adapter *adapter = netdev_priv(netdev);
3111         struct e1000_hw *hw = &adapter->hw;
3112         uint32_t icr = E1000_READ_REG(hw, ICR);
3113 #if defined(CONFIG_E1000_NAPI) && defined(CONFIG_E1000_MQ) || !defined(CONFIG_E1000_NAPI)
3114         int i;
3115 #endif
3116
3117         if(unlikely(!icr))
3118                 return IRQ_NONE;  /* Not our interrupt */
3119
3120         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3121                 hw->get_link_status = 1;
3122                 mod_timer(&adapter->watchdog_timer, jiffies);
3123         }
3124
3125 #ifdef CONFIG_E1000_NAPI
3126         atomic_inc(&adapter->irq_sem);
3127         E1000_WRITE_REG(hw, IMC, ~0);
3128         E1000_WRITE_FLUSH(hw);
3129 #ifdef CONFIG_E1000_MQ
3130         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3131                 cpu_set(adapter->cpu_for_queue[0],
3132                         adapter->rx_sched_call_data.cpumask);
3133                 for (i = 1; i < adapter->num_queues; i++) {
3134                         cpu_set(adapter->cpu_for_queue[i],
3135                                 adapter->rx_sched_call_data.cpumask);
3136                         atomic_inc(&adapter->irq_sem);
3137                 }
3138                 atomic_set(&adapter->rx_sched_call_data.count, i);
3139                 smp_call_async_mask(&adapter->rx_sched_call_data);
3140         } else {
3141                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3142         }
3143 #else /* if !CONFIG_E1000_MQ */
3144         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3145                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3146         else
3147                 e1000_irq_enable(adapter);
3148 #endif /* CONFIG_E1000_MQ */
3149
3150 #else /* if !CONFIG_E1000_NAPI */
3151         /* Writing IMC and IMS is needed for 82547.
3152            Due to Hub Link bus being occupied, an interrupt
3153            de-assertion message is not able to be sent.
3154            When an interrupt assertion message is generated later,
3155            two messages are re-ordered and sent out.
3156            That causes APIC to think 82547 is in de-assertion
3157            state, while 82547 is in assertion state, resulting
3158            in dead lock. Writing IMC forces 82547 into
3159            de-assertion state.
3160         */
3161         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3162                 atomic_inc(&adapter->irq_sem);
3163                 E1000_WRITE_REG(hw, IMC, ~0);
3164         }
3165
3166         for(i = 0; i < E1000_MAX_INTR; i++)
3167                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3168                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3169                         break;
3170
3171         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3172                 e1000_irq_enable(adapter);
3173
3174 #endif /* CONFIG_E1000_NAPI */
3175
3176         return IRQ_HANDLED;
3177 }
3178
3179 #ifdef CONFIG_E1000_NAPI
3180 /**
3181  * e1000_clean - NAPI Rx polling callback
3182  * @adapter: board private structure
3183  **/
3184
3185 static int
3186 e1000_clean(struct net_device *poll_dev, int *budget)
3187 {
3188         struct e1000_adapter *adapter;
3189         int work_to_do = min(*budget, poll_dev->quota);
3190         int tx_cleaned, i = 0, work_done = 0;
3191
3192         /* Must NOT use netdev_priv macro here. */
3193         adapter = poll_dev->priv;
3194
3195         /* Keep link state information with original netdev */
3196         if (!netif_carrier_ok(adapter->netdev))
3197                 goto quit_polling;
3198
3199         while (poll_dev != &adapter->polling_netdev[i]) {
3200                 i++;
3201                 if (unlikely(i == adapter->num_queues))
3202                         BUG();
3203         }
3204
3205         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3206         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3207                           &work_done, work_to_do);
3208
3209         *budget -= work_done;
3210         poll_dev->quota -= work_done;
3211
3212         /* If no Tx and not enough Rx work done, exit the polling mode */
3213         if((!tx_cleaned && (work_done == 0)) ||
3214            !netif_running(adapter->netdev)) {
3215 quit_polling:
3216                 netif_rx_complete(poll_dev);
3217                 e1000_irq_enable(adapter);
3218                 return 0;
3219         }
3220
3221         return 1;
3222 }
3223
3224 #endif
3225 /**
3226  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3227  * @adapter: board private structure
3228  **/
3229
3230 static boolean_t
3231 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3232                    struct e1000_tx_ring *tx_ring)
3233 {
3234         struct net_device *netdev = adapter->netdev;
3235         struct e1000_tx_desc *tx_desc, *eop_desc;
3236         struct e1000_buffer *buffer_info;
3237         unsigned int i, eop;
3238         boolean_t cleaned = FALSE;
3239
3240         i = tx_ring->next_to_clean;
3241         eop = tx_ring->buffer_info[i].next_to_watch;
3242         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3243
3244         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3245                 for(cleaned = FALSE; !cleaned; ) {
3246                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3247                         buffer_info = &tx_ring->buffer_info[i];
3248                         cleaned = (i == eop);
3249
3250                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3251
3252                         tx_desc->buffer_addr = 0;
3253                         tx_desc->lower.data = 0;
3254                         tx_desc->upper.data = 0;
3255
3256                         if(unlikely(++i == tx_ring->count)) i = 0;
3257                 }
3258
3259                 tx_ring->pkt++;
3260
3261                 eop = tx_ring->buffer_info[i].next_to_watch;
3262                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3263         }
3264
3265         tx_ring->next_to_clean = i;
3266
3267         spin_lock(&tx_ring->tx_lock);
3268
3269         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3270                     netif_carrier_ok(netdev)))
3271                 netif_wake_queue(netdev);
3272
3273         spin_unlock(&tx_ring->tx_lock);
3274
3275         if (adapter->detect_tx_hung) {
3276                 /* Detect a transmit hang in hardware, this serializes the
3277                  * check with the clearing of time_stamp and movement of i */
3278                 adapter->detect_tx_hung = FALSE;
3279                 if (tx_ring->buffer_info[i].dma &&
3280                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp + HZ)
3281                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3282                         E1000_STATUS_TXOFF)) {
3283
3284                         /* detected Tx unit hang */
3285                         i = tx_ring->next_to_clean;
3286                         eop = tx_ring->buffer_info[i].next_to_watch;
3287                         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3288                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3289                                         "  TDH                  <%x>\n"
3290                                         "  TDT                  <%x>\n"
3291                                         "  next_to_use          <%x>\n"
3292                                         "  next_to_clean        <%x>\n"
3293                                         "buffer_info[next_to_clean]\n"
3294                                         "  dma                  <%llx>\n"
3295                                         "  time_stamp           <%lx>\n"
3296                                         "  next_to_watch        <%x>\n"
3297                                         "  jiffies              <%lx>\n"
3298                                         "  next_to_watch.status <%x>\n",
3299                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3300                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3301                                 tx_ring->next_to_use,
3302                                 i,
3303                                 (unsigned long long)tx_ring->buffer_info[i].dma,
3304                                 tx_ring->buffer_info[i].time_stamp,
3305                                 eop,
3306                                 jiffies,
3307                                 eop_desc->upper.fields.status);
3308                         netif_stop_queue(netdev);
3309                 }
3310         }
3311         return cleaned;
3312 }
3313
3314 /**
3315  * e1000_rx_checksum - Receive Checksum Offload for 82543
3316  * @adapter:     board private structure
3317  * @status_err:  receive descriptor status and error fields
3318  * @csum:        receive descriptor csum field
3319  * @sk_buff:     socket buffer with received data
3320  **/
3321
3322 static inline void
3323 e1000_rx_checksum(struct e1000_adapter *adapter,
3324                   uint32_t status_err, uint32_t csum,
3325                   struct sk_buff *skb)
3326 {
3327         uint16_t status = (uint16_t)status_err;
3328         uint8_t errors = (uint8_t)(status_err >> 24);
3329         skb->ip_summed = CHECKSUM_NONE;
3330
3331         /* 82543 or newer only */
3332         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3333         /* Ignore Checksum bit is set */
3334         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3335         /* TCP/UDP checksum error bit is set */
3336         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3337                 /* let the stack verify checksum errors */
3338                 adapter->hw_csum_err++;
3339                 return;
3340         }
3341         /* TCP/UDP Checksum has not been calculated */
3342         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3343                 if(!(status & E1000_RXD_STAT_TCPCS))
3344                         return;
3345         } else {
3346                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3347                         return;
3348         }
3349         /* It must be a TCP or UDP packet with a valid checksum */
3350         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3351                 /* TCP checksum is good */
3352                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3353         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3354                 /* IP fragment with UDP payload */
3355                 /* Hardware complements the payload checksum, so we undo it
3356                  * and then put the value in host order for further stack use.
3357                  */
3358                 csum = ntohl(csum ^ 0xFFFF);
3359                 skb->csum = csum;
3360                 skb->ip_summed = CHECKSUM_HW;
3361         }
3362         adapter->hw_csum_good++;
3363 }
3364
3365 /**
3366  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3367  * @adapter: board private structure
3368  **/
3369
3370 static boolean_t
3371 #ifdef CONFIG_E1000_NAPI
3372 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3373                    struct e1000_rx_ring *rx_ring,
3374                    int *work_done, int work_to_do)
3375 #else
3376 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3377                    struct e1000_rx_ring *rx_ring)
3378 #endif
3379 {
3380         struct net_device *netdev = adapter->netdev;
3381         struct pci_dev *pdev = adapter->pdev;
3382         struct e1000_rx_desc *rx_desc;
3383         struct e1000_buffer *buffer_info;
3384         struct sk_buff *skb;
3385         unsigned long flags;
3386         uint32_t length;
3387         uint8_t last_byte;
3388         unsigned int i;
3389         boolean_t cleaned = FALSE;
3390
3391         i = rx_ring->next_to_clean;
3392         rx_desc = E1000_RX_DESC(*rx_ring, i);
3393
3394         while(rx_desc->status & E1000_RXD_STAT_DD) {
3395                 buffer_info = &rx_ring->buffer_info[i];
3396 #ifdef CONFIG_E1000_NAPI
3397                 if(*work_done >= work_to_do)
3398                         break;
3399                 (*work_done)++;
3400 #endif
3401                 cleaned = TRUE;
3402
3403                 pci_unmap_single(pdev,
3404                                  buffer_info->dma,
3405                                  buffer_info->length,
3406                                  PCI_DMA_FROMDEVICE);
3407
3408                 skb = buffer_info->skb;
3409                 length = le16_to_cpu(rx_desc->length);
3410
3411                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3412                         /* All receives must fit into a single buffer */
3413                         E1000_DBG("%s: Receive packet consumed multiple"
3414                                   " buffers\n", netdev->name);
3415                         dev_kfree_skb_irq(skb);
3416                         goto next_desc;
3417                 }
3418
3419                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3420                         last_byte = *(skb->data + length - 1);
3421                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3422                                       rx_desc->errors, length, last_byte)) {
3423                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3424                                 e1000_tbi_adjust_stats(&adapter->hw,
3425                                                        &adapter->stats,
3426                                                        length, skb->data);
3427                                 spin_unlock_irqrestore(&adapter->stats_lock,
3428                                                        flags);
3429                                 length--;
3430                         } else {
3431                                 dev_kfree_skb_irq(skb);
3432                                 goto next_desc;
3433                         }
3434                 }
3435
3436                 /* Good Receive */
3437                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3438
3439                 /* Receive Checksum Offload */
3440                 e1000_rx_checksum(adapter,
3441                                   (uint32_t)(rx_desc->status) |
3442                                   ((uint32_t)(rx_desc->errors) << 24),
3443                                   rx_desc->csum, skb);
3444                 skb->protocol = eth_type_trans(skb, netdev);
3445 #ifdef CONFIG_E1000_NAPI
3446                 if(unlikely(adapter->vlgrp &&
3447                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3448                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3449                                                  le16_to_cpu(rx_desc->special) &
3450                                                  E1000_RXD_SPC_VLAN_MASK);
3451                 } else {
3452                         netif_receive_skb(skb);
3453                 }
3454 #else /* CONFIG_E1000_NAPI */
3455                 if(unlikely(adapter->vlgrp &&
3456                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3457                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3458                                         le16_to_cpu(rx_desc->special) &
3459                                         E1000_RXD_SPC_VLAN_MASK);
3460                 } else {
3461                         netif_rx(skb);
3462                 }
3463 #endif /* CONFIG_E1000_NAPI */
3464                 netdev->last_rx = jiffies;
3465                 rx_ring->pkt++;
3466
3467 next_desc:
3468                 rx_desc->status = 0;
3469                 buffer_info->skb = NULL;
3470                 if(unlikely(++i == rx_ring->count)) i = 0;
3471
3472                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3473         }
3474         rx_ring->next_to_clean = i;
3475         adapter->alloc_rx_buf(adapter, rx_ring);
3476
3477         return cleaned;
3478 }
3479
3480 /**
3481  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3482  * @adapter: board private structure
3483  **/
3484
3485 static boolean_t
3486 #ifdef CONFIG_E1000_NAPI
3487 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3488                       struct e1000_rx_ring *rx_ring,
3489                       int *work_done, int work_to_do)
3490 #else
3491 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3492                       struct e1000_rx_ring *rx_ring)
3493 #endif
3494 {
3495         union e1000_rx_desc_packet_split *rx_desc;
3496         struct net_device *netdev = adapter->netdev;
3497         struct pci_dev *pdev = adapter->pdev;
3498         struct e1000_buffer *buffer_info;
3499         struct e1000_ps_page *ps_page;
3500         struct e1000_ps_page_dma *ps_page_dma;
3501         struct sk_buff *skb;
3502         unsigned int i, j;
3503         uint32_t length, staterr;
3504         boolean_t cleaned = FALSE;
3505
3506         i = rx_ring->next_to_clean;
3507         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3508         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3509
3510         while(staterr & E1000_RXD_STAT_DD) {
3511                 buffer_info = &rx_ring->buffer_info[i];
3512                 ps_page = &rx_ring->ps_page[i];
3513                 ps_page_dma = &rx_ring->ps_page_dma[i];
3514 #ifdef CONFIG_E1000_NAPI
3515                 if(unlikely(*work_done >= work_to_do))
3516                         break;
3517                 (*work_done)++;
3518 #endif
3519                 cleaned = TRUE;
3520                 pci_unmap_single(pdev, buffer_info->dma,
3521                                  buffer_info->length,
3522                                  PCI_DMA_FROMDEVICE);
3523
3524                 skb = buffer_info->skb;
3525
3526                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3527                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3528                                   " the full packet\n", netdev->name);
3529                         dev_kfree_skb_irq(skb);
3530                         goto next_desc;
3531                 }
3532
3533                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3534                         dev_kfree_skb_irq(skb);
3535                         goto next_desc;
3536                 }
3537
3538                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3539
3540                 if(unlikely(!length)) {
3541                         E1000_DBG("%s: Last part of the packet spanning"
3542                                   " multiple descriptors\n", netdev->name);
3543                         dev_kfree_skb_irq(skb);
3544                         goto next_desc;
3545                 }
3546
3547                 /* Good Receive */
3548                 skb_put(skb, length);
3549
3550                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3551                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3552                                 break;
3553
3554                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3555                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3556                         ps_page_dma->ps_page_dma[j] = 0;
3557                         skb_shinfo(skb)->frags[j].page =
3558                                 ps_page->ps_page[j];
3559                         ps_page->ps_page[j] = NULL;
3560                         skb_shinfo(skb)->frags[j].page_offset = 0;
3561                         skb_shinfo(skb)->frags[j].size = length;
3562                         skb_shinfo(skb)->nr_frags++;
3563                         skb->len += length;
3564                         skb->data_len += length;
3565                 }
3566
3567                 e1000_rx_checksum(adapter, staterr,
3568                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3569                 skb->protocol = eth_type_trans(skb, netdev);
3570
3571                 if(likely(rx_desc->wb.upper.header_status &
3572                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3573                         adapter->rx_hdr_split++;
3574 #ifdef HAVE_RX_ZERO_COPY
3575                         skb_shinfo(skb)->zero_copy = TRUE;
3576 #endif
3577                 }
3578 #ifdef CONFIG_E1000_NAPI
3579                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3580                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3581                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3582                                 E1000_RXD_SPC_VLAN_MASK);
3583                 } else {
3584                         netif_receive_skb(skb);
3585                 }
3586 #else /* CONFIG_E1000_NAPI */
3587                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3588                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3589                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3590                                 E1000_RXD_SPC_VLAN_MASK);
3591                 } else {
3592                         netif_rx(skb);
3593                 }
3594 #endif /* CONFIG_E1000_NAPI */
3595                 netdev->last_rx = jiffies;
3596                 rx_ring->pkt++;
3597
3598 next_desc:
3599                 rx_desc->wb.middle.status_error &= ~0xFF;
3600                 buffer_info->skb = NULL;
3601                 if(unlikely(++i == rx_ring->count)) i = 0;
3602
3603                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3604                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3605         }
3606         rx_ring->next_to_clean = i;
3607         adapter->alloc_rx_buf(adapter, rx_ring);
3608
3609         return cleaned;
3610 }
3611
3612 /**
3613  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3614  * @adapter: address of board private structure
3615  **/
3616
3617 static void
3618 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3619                        struct e1000_rx_ring *rx_ring)
3620 {
3621         struct net_device *netdev = adapter->netdev;
3622         struct pci_dev *pdev = adapter->pdev;
3623         struct e1000_rx_desc *rx_desc;
3624         struct e1000_buffer *buffer_info;
3625         struct sk_buff *skb;
3626         unsigned int i;
3627         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3628
3629         i = rx_ring->next_to_use;
3630         buffer_info = &rx_ring->buffer_info[i];
3631
3632         while(!buffer_info->skb) {
3633                 skb = dev_alloc_skb(bufsz);
3634
3635                 if(unlikely(!skb)) {
3636                         /* Better luck next round */
3637                         break;
3638                 }
3639
3640                 /* Fix for errata 23, can't cross 64kB boundary */
3641                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3642                         struct sk_buff *oldskb = skb;
3643                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3644                                              "at %p\n", bufsz, skb->data);
3645                         /* Try again, without freeing the previous */
3646                         skb = dev_alloc_skb(bufsz);
3647                         /* Failed allocation, critical failure */
3648                         if (!skb) {
3649                                 dev_kfree_skb(oldskb);
3650                                 break;
3651                         }
3652
3653                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3654                                 /* give up */
3655                                 dev_kfree_skb(skb);
3656                                 dev_kfree_skb(oldskb);
3657                                 break; /* while !buffer_info->skb */
3658                         } else {
3659                                 /* Use new allocation */
3660                                 dev_kfree_skb(oldskb);
3661                         }
3662                 }
3663                 /* Make buffer alignment 2 beyond a 16 byte boundary
3664                  * this will result in a 16 byte aligned IP header after
3665                  * the 14 byte MAC header is removed
3666                  */
3667                 skb_reserve(skb, NET_IP_ALIGN);
3668
3669                 skb->dev = netdev;
3670
3671                 buffer_info->skb = skb;
3672                 buffer_info->length = adapter->rx_buffer_len;
3673                 buffer_info->dma = pci_map_single(pdev,
3674                                                   skb->data,
3675                                                   adapter->rx_buffer_len,
3676                                                   PCI_DMA_FROMDEVICE);
3677
3678                 /* Fix for errata 23, can't cross 64kB boundary */
3679                 if (!e1000_check_64k_bound(adapter,
3680                                         (void *)(unsigned long)buffer_info->dma,
3681                                         adapter->rx_buffer_len)) {
3682                         DPRINTK(RX_ERR, ERR,
3683                                 "dma align check failed: %u bytes at %p\n",
3684                                 adapter->rx_buffer_len,
3685                                 (void *)(unsigned long)buffer_info->dma);
3686                         dev_kfree_skb(skb);
3687                         buffer_info->skb = NULL;
3688
3689                         pci_unmap_single(pdev, buffer_info->dma,
3690                                          adapter->rx_buffer_len,
3691                                          PCI_DMA_FROMDEVICE);
3692
3693                         break; /* while !buffer_info->skb */
3694                 }
3695                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3696                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3697
3698                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3699                         /* Force memory writes to complete before letting h/w
3700                          * know there are new descriptors to fetch.  (Only
3701                          * applicable for weak-ordered memory model archs,
3702                          * such as IA-64). */
3703                         wmb();
3704                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3705                 }
3706
3707                 if(unlikely(++i == rx_ring->count)) i = 0;
3708                 buffer_info = &rx_ring->buffer_info[i];
3709         }
3710
3711         rx_ring->next_to_use = i;
3712 }
3713
3714 /**
3715  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3716  * @adapter: address of board private structure
3717  **/
3718
3719 static void
3720 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3721                           struct e1000_rx_ring *rx_ring)
3722 {
3723         struct net_device *netdev = adapter->netdev;
3724         struct pci_dev *pdev = adapter->pdev;
3725         union e1000_rx_desc_packet_split *rx_desc;
3726         struct e1000_buffer *buffer_info;
3727         struct e1000_ps_page *ps_page;
3728         struct e1000_ps_page_dma *ps_page_dma;
3729         struct sk_buff *skb;
3730         unsigned int i, j;
3731
3732         i = rx_ring->next_to_use;
3733         buffer_info = &rx_ring->buffer_info[i];
3734         ps_page = &rx_ring->ps_page[i];
3735         ps_page_dma = &rx_ring->ps_page_dma[i];
3736
3737         while(!buffer_info->skb) {
3738                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3739
3740                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3741                         if (j < adapter->rx_ps_pages) {
3742                                 if (likely(!ps_page->ps_page[j])) {
3743                                         ps_page->ps_page[j] =
3744                                                 alloc_page(GFP_ATOMIC);
3745                                         if (unlikely(!ps_page->ps_page[j]))
3746                                                 goto no_buffers;
3747                                         ps_page_dma->ps_page_dma[j] =
3748                                                 pci_map_page(pdev,
3749                                                             ps_page->ps_page[j],
3750                                                             0, PAGE_SIZE,
3751                                                             PCI_DMA_FROMDEVICE);
3752                                 }
3753                                 /* Refresh the desc even if buffer_addrs didn't
3754                                  * change because each write-back erases
3755                                  * this info.
3756                                  */
3757                                 rx_desc->read.buffer_addr[j+1] =
3758                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3759                         } else
3760                                 rx_desc->read.buffer_addr[j+1] = ~0;
3761                 }
3762
3763                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3764
3765                 if(unlikely(!skb))
3766                         break;
3767
3768                 /* Make buffer alignment 2 beyond a 16 byte boundary
3769                  * this will result in a 16 byte aligned IP header after
3770                  * the 14 byte MAC header is removed
3771                  */
3772                 skb_reserve(skb, NET_IP_ALIGN);
3773
3774                 skb->dev = netdev;
3775
3776                 buffer_info->skb = skb;
3777                 buffer_info->length = adapter->rx_ps_bsize0;
3778                 buffer_info->dma = pci_map_single(pdev, skb->data,
3779                                                   adapter->rx_ps_bsize0,
3780                                                   PCI_DMA_FROMDEVICE);
3781
3782                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3783
3784                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3785                         /* Force memory writes to complete before letting h/w
3786                          * know there are new descriptors to fetch.  (Only
3787                          * applicable for weak-ordered memory model archs,
3788                          * such as IA-64). */
3789                         wmb();
3790                         /* Hardware increments by 16 bytes, but packet split
3791                          * descriptors are 32 bytes...so we increment tail
3792                          * twice as much.
3793                          */
3794                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3795                 }
3796
3797                 if(unlikely(++i == rx_ring->count)) i = 0;
3798                 buffer_info = &rx_ring->buffer_info[i];
3799                 ps_page = &rx_ring->ps_page[i];
3800                 ps_page_dma = &rx_ring->ps_page_dma[i];
3801         }
3802
3803 no_buffers:
3804         rx_ring->next_to_use = i;
3805 }
3806
3807 /**
3808  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3809  * @adapter:
3810  **/
3811
3812 static void
3813 e1000_smartspeed(struct e1000_adapter *adapter)
3814 {
3815         uint16_t phy_status;
3816         uint16_t phy_ctrl;
3817
3818         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3819            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3820                 return;
3821
3822         if(adapter->smartspeed == 0) {
3823                 /* If Master/Slave config fault is asserted twice,
3824                  * we assume back-to-back */
3825                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3826                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3827                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3828                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3829                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3830                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3831                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3832                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3833                                             phy_ctrl);
3834                         adapter->smartspeed++;
3835                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3836                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3837                                                &phy_ctrl)) {
3838                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3839                                              MII_CR_RESTART_AUTO_NEG);
3840                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3841                                                     phy_ctrl);
3842                         }
3843                 }
3844                 return;
3845         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
3846                 /* If still no link, perhaps using 2/3 pair cable */
3847                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3848                 phy_ctrl |= CR_1000T_MS_ENABLE;
3849                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
3850                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3851                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
3852                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3853                                      MII_CR_RESTART_AUTO_NEG);
3854                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
3855                 }
3856         }
3857         /* Restart process after E1000_SMARTSPEED_MAX iterations */
3858         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
3859                 adapter->smartspeed = 0;
3860 }
3861
3862 /**
3863  * e1000_ioctl -
3864  * @netdev:
3865  * @ifreq:
3866  * @cmd:
3867  **/
3868
3869 static int
3870 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3871 {
3872         switch (cmd) {
3873         case SIOCGMIIPHY:
3874         case SIOCGMIIREG:
3875         case SIOCSMIIREG:
3876                 return e1000_mii_ioctl(netdev, ifr, cmd);
3877         default:
3878                 return -EOPNOTSUPP;
3879         }
3880 }
3881
3882 /**
3883  * e1000_mii_ioctl -
3884  * @netdev:
3885  * @ifreq:
3886  * @cmd:
3887  **/
3888
3889 static int
3890 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3891 {
3892         struct e1000_adapter *adapter = netdev_priv(netdev);
3893         struct mii_ioctl_data *data = if_mii(ifr);
3894         int retval;
3895         uint16_t mii_reg;
3896         uint16_t spddplx;
3897         unsigned long flags;
3898
3899         if(adapter->hw.media_type != e1000_media_type_copper)
3900                 return -EOPNOTSUPP;
3901
3902         switch (cmd) {
3903         case SIOCGMIIPHY:
3904                 data->phy_id = adapter->hw.phy_addr;
3905                 break;
3906         case SIOCGMIIREG:
3907                 if(!capable(CAP_NET_ADMIN))
3908                         return -EPERM;
3909                 spin_lock_irqsave(&adapter->stats_lock, flags);
3910                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
3911                                    &data->val_out)) {
3912                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3913                         return -EIO;
3914                 }
3915                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3916                 break;
3917         case SIOCSMIIREG:
3918                 if(!capable(CAP_NET_ADMIN))
3919                         return -EPERM;
3920                 if(data->reg_num & ~(0x1F))
3921                         return -EFAULT;
3922                 mii_reg = data->val_in;
3923                 spin_lock_irqsave(&adapter->stats_lock, flags);
3924                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
3925                                         mii_reg)) {
3926                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3927                         return -EIO;
3928                 }
3929                 if(adapter->hw.phy_type == e1000_phy_m88) {
3930                         switch (data->reg_num) {
3931                         case PHY_CTRL:
3932                                 if(mii_reg & MII_CR_POWER_DOWN)
3933                                         break;
3934                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
3935                                         adapter->hw.autoneg = 1;
3936                                         adapter->hw.autoneg_advertised = 0x2F;
3937                                 } else {
3938                                         if (mii_reg & 0x40)
3939                                                 spddplx = SPEED_1000;
3940                                         else if (mii_reg & 0x2000)
3941                                                 spddplx = SPEED_100;
3942                                         else
3943                                                 spddplx = SPEED_10;
3944                                         spddplx += (mii_reg & 0x100)
3945                                                    ? FULL_DUPLEX :
3946                                                    HALF_DUPLEX;
3947                                         retval = e1000_set_spd_dplx(adapter,
3948                                                                     spddplx);
3949                                         if(retval) {
3950                                                 spin_unlock_irqrestore(
3951                                                         &adapter->stats_lock,
3952                                                         flags);
3953                                                 return retval;
3954                                         }
3955                                 }
3956                                 if(netif_running(adapter->netdev)) {
3957                                         e1000_down(adapter);
3958                                         e1000_up(adapter);
3959                                 } else
3960                                         e1000_reset(adapter);
3961                                 break;
3962                         case M88E1000_PHY_SPEC_CTRL:
3963                         case M88E1000_EXT_PHY_SPEC_CTRL:
3964                                 if(e1000_phy_reset(&adapter->hw)) {
3965                                         spin_unlock_irqrestore(
3966                                                 &adapter->stats_lock, flags);
3967                                         return -EIO;
3968                                 }
3969                                 break;
3970                         }
3971                 } else {
3972                         switch (data->reg_num) {
3973                         case PHY_CTRL:
3974                                 if(mii_reg & MII_CR_POWER_DOWN)
3975                                         break;
3976                                 if(netif_running(adapter->netdev)) {
3977                                         e1000_down(adapter);
3978                                         e1000_up(adapter);
3979                                 } else
3980                                         e1000_reset(adapter);
3981                                 break;
3982                         }
3983                 }
3984                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3985                 break;
3986         default:
3987                 return -EOPNOTSUPP;
3988         }
3989         return E1000_SUCCESS;
3990 }
3991
3992 void
3993 e1000_pci_set_mwi(struct e1000_hw *hw)
3994 {
3995         struct e1000_adapter *adapter = hw->back;
3996         int ret_val = pci_set_mwi(adapter->pdev);
3997
3998         if(ret_val)
3999                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4000 }
4001
4002 void
4003 e1000_pci_clear_mwi(struct e1000_hw *hw)
4004 {
4005         struct e1000_adapter *adapter = hw->back;
4006
4007         pci_clear_mwi(adapter->pdev);
4008 }
4009
4010 void
4011 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4012 {
4013         struct e1000_adapter *adapter = hw->back;
4014
4015         pci_read_config_word(adapter->pdev, reg, value);
4016 }
4017
4018 void
4019 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4020 {
4021         struct e1000_adapter *adapter = hw->back;
4022
4023         pci_write_config_word(adapter->pdev, reg, *value);
4024 }
4025
4026 uint32_t
4027 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4028 {
4029         return inl(port);
4030 }
4031
4032 void
4033 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4034 {
4035         outl(value, port);
4036 }
4037
4038 static void
4039 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4040 {
4041         struct e1000_adapter *adapter = netdev_priv(netdev);
4042         uint32_t ctrl, rctl;
4043
4044         e1000_irq_disable(adapter);
4045         adapter->vlgrp = grp;
4046
4047         if(grp) {
4048                 /* enable VLAN tag insert/strip */
4049                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4050                 ctrl |= E1000_CTRL_VME;
4051                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4052
4053                 /* enable VLAN receive filtering */
4054                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4055                 rctl |= E1000_RCTL_VFE;
4056                 rctl &= ~E1000_RCTL_CFIEN;
4057                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4058                 e1000_update_mng_vlan(adapter);
4059         } else {
4060                 /* disable VLAN tag insert/strip */
4061                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4062                 ctrl &= ~E1000_CTRL_VME;
4063                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4064
4065                 /* disable VLAN filtering */
4066                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4067                 rctl &= ~E1000_RCTL_VFE;
4068                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4069                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4070                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4071                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4072                 }
4073         }
4074
4075         e1000_irq_enable(adapter);
4076 }
4077
4078 static void
4079 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4080 {
4081         struct e1000_adapter *adapter = netdev_priv(netdev);
4082         uint32_t vfta, index;
4083         if((adapter->hw.mng_cookie.status &
4084                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4085                 (vid == adapter->mng_vlan_id))
4086                 return;
4087         /* add VID to filter table */
4088         index = (vid >> 5) & 0x7F;
4089         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4090         vfta |= (1 << (vid & 0x1F));
4091         e1000_write_vfta(&adapter->hw, index, vfta);
4092 }
4093
4094 static void
4095 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4096 {
4097         struct e1000_adapter *adapter = netdev_priv(netdev);
4098         uint32_t vfta, index;
4099
4100         e1000_irq_disable(adapter);
4101
4102         if(adapter->vlgrp)
4103                 adapter->vlgrp->vlan_devices[vid] = NULL;
4104
4105         e1000_irq_enable(adapter);
4106
4107         if((adapter->hw.mng_cookie.status &
4108                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4109                 (vid == adapter->mng_vlan_id))
4110                 return;
4111         /* remove VID from filter table */
4112         index = (vid >> 5) & 0x7F;
4113         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4114         vfta &= ~(1 << (vid & 0x1F));
4115         e1000_write_vfta(&adapter->hw, index, vfta);
4116 }
4117
4118 static void
4119 e1000_restore_vlan(struct e1000_adapter *adapter)
4120 {
4121         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4122
4123         if(adapter->vlgrp) {
4124                 uint16_t vid;
4125                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4126                         if(!adapter->vlgrp->vlan_devices[vid])
4127                                 continue;
4128                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4129                 }
4130         }
4131 }
4132
4133 int
4134 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4135 {
4136         adapter->hw.autoneg = 0;
4137
4138         /* Fiber NICs only allow 1000 gbps Full duplex */
4139         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4140                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4141                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4142                 return -EINVAL;
4143         }
4144
4145         switch(spddplx) {
4146         case SPEED_10 + DUPLEX_HALF:
4147                 adapter->hw.forced_speed_duplex = e1000_10_half;
4148                 break;
4149         case SPEED_10 + DUPLEX_FULL:
4150                 adapter->hw.forced_speed_duplex = e1000_10_full;
4151                 break;
4152         case SPEED_100 + DUPLEX_HALF:
4153                 adapter->hw.forced_speed_duplex = e1000_100_half;
4154                 break;
4155         case SPEED_100 + DUPLEX_FULL:
4156                 adapter->hw.forced_speed_duplex = e1000_100_full;
4157                 break;
4158         case SPEED_1000 + DUPLEX_FULL:
4159                 adapter->hw.autoneg = 1;
4160                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4161                 break;
4162         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4163         default:
4164                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4165                 return -EINVAL;
4166         }
4167         return 0;
4168 }
4169
4170 #ifdef CONFIG_PM
4171 static int
4172 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4173 {
4174         struct net_device *netdev = pci_get_drvdata(pdev);
4175         struct e1000_adapter *adapter = netdev_priv(netdev);
4176         uint32_t ctrl, ctrl_ext, rctl, manc, status, swsm;
4177         uint32_t wufc = adapter->wol;
4178
4179         netif_device_detach(netdev);
4180
4181         if(netif_running(netdev))
4182                 e1000_down(adapter);
4183
4184         status = E1000_READ_REG(&adapter->hw, STATUS);
4185         if(status & E1000_STATUS_LU)
4186                 wufc &= ~E1000_WUFC_LNKC;
4187
4188         if(wufc) {
4189                 e1000_setup_rctl(adapter);
4190                 e1000_set_multi(netdev);
4191
4192                 /* turn on all-multi mode if wake on multicast is enabled */
4193                 if(adapter->wol & E1000_WUFC_MC) {
4194                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4195                         rctl |= E1000_RCTL_MPE;
4196                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4197                 }
4198
4199                 if(adapter->hw.mac_type >= e1000_82540) {
4200                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4201                         /* advertise wake from D3Cold */
4202                         #define E1000_CTRL_ADVD3WUC 0x00100000
4203                         /* phy power management enable */
4204                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4205                         ctrl |= E1000_CTRL_ADVD3WUC |
4206                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4207                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4208                 }
4209
4210                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4211                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4212                         /* keep the laser running in D3 */
4213                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4214                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4215                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4216                 }
4217
4218                 /* Allow time for pending master requests to run */
4219                 e1000_disable_pciex_master(&adapter->hw);
4220
4221                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4222                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4223                 pci_enable_wake(pdev, 3, 1);
4224                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4225         } else {
4226                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4227                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4228                 pci_enable_wake(pdev, 3, 0);
4229                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4230         }
4231
4232         pci_save_state(pdev);
4233
4234         if(adapter->hw.mac_type >= e1000_82540 &&
4235            adapter->hw.media_type == e1000_media_type_copper) {
4236                 manc = E1000_READ_REG(&adapter->hw, MANC);
4237                 if(manc & E1000_MANC_SMBUS_EN) {
4238                         manc |= E1000_MANC_ARP_EN;
4239                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4240                         pci_enable_wake(pdev, 3, 1);
4241                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4242                 }
4243         }
4244
4245         switch(adapter->hw.mac_type) {
4246         case e1000_82571:
4247         case e1000_82572:
4248                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4249                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4250                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
4251                 break;
4252         case e1000_82573:
4253                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4254                 E1000_WRITE_REG(&adapter->hw, SWSM,
4255                                 swsm & ~E1000_SWSM_DRV_LOAD);
4256                 break;
4257         default:
4258                 break;
4259         }
4260
4261         pci_disable_device(pdev);
4262         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4263
4264         return 0;
4265 }
4266
4267 static int
4268 e1000_resume(struct pci_dev *pdev)
4269 {
4270         struct net_device *netdev = pci_get_drvdata(pdev);
4271         struct e1000_adapter *adapter = netdev_priv(netdev);
4272         uint32_t manc, ret_val, swsm;
4273         uint32_t ctrl_ext;
4274
4275         pci_set_power_state(pdev, PCI_D0);
4276         pci_restore_state(pdev);
4277         ret_val = pci_enable_device(pdev);
4278         pci_set_master(pdev);
4279
4280         pci_enable_wake(pdev, PCI_D3hot, 0);
4281         pci_enable_wake(pdev, PCI_D3cold, 0);
4282
4283         e1000_reset(adapter);
4284         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4285
4286         if(netif_running(netdev))
4287                 e1000_up(adapter);
4288
4289         netif_device_attach(netdev);
4290
4291         if(adapter->hw.mac_type >= e1000_82540 &&
4292            adapter->hw.media_type == e1000_media_type_copper) {
4293                 manc = E1000_READ_REG(&adapter->hw, MANC);
4294                 manc &= ~(E1000_MANC_ARP_EN);
4295                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4296         }
4297
4298         switch(adapter->hw.mac_type) {
4299         case e1000_82571:
4300         case e1000_82572:
4301                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4302                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
4303                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
4304                 break;
4305         case e1000_82573:
4306                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
4307                 E1000_WRITE_REG(&adapter->hw, SWSM,
4308                                 swsm | E1000_SWSM_DRV_LOAD);
4309                 break;
4310         default:
4311                 break;
4312         }
4313
4314         return 0;
4315 }
4316 #endif
4317 #ifdef CONFIG_NET_POLL_CONTROLLER
4318 /*
4319  * Polling 'interrupt' - used by things like netconsole to send skbs
4320  * without having to re-enable interrupts. It's not called while
4321  * the interrupt routine is executing.
4322  */
4323 static void
4324 e1000_netpoll(struct net_device *netdev)
4325 {
4326         struct e1000_adapter *adapter = netdev_priv(netdev);
4327         disable_irq(adapter->pdev->irq);
4328         e1000_intr(adapter->pdev->irq, netdev, NULL);
4329         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4330         enable_irq(adapter->pdev->irq);
4331 }
4332 #endif
4333
4334 /* e1000_main.c */