Pileus Git - ~andy/linux/blob - drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  * 6.0.58       4/20/05
  33  *   o Accepted ethtool cleanup patch from Stephen Hemminger
  34  * 6.0.44+      2/15/05
  35  *   o applied Anton's patch to resolve tx hang in hardware
  36  *   o Applied Andrew Mortons patch - e1000 stops working after resume
  37  */
  38
  39 char e1000_driver_name[] = "e1000";
  40 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  41 #ifndef CONFIG_E1000_NAPI
  42 #define DRIVERNAPI
  43 #else
  44 #define DRIVERNAPI "-NAPI"
  45 #endif
  46 #define DRV_VERSION "6.3.9-k2"DRIVERNAPI
  47 char e1000_driver_version[] = DRV_VERSION;
  48 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
  49
  50 /* e1000_pci_tbl - PCI Device ID Table
  51  *
  52  * Last entry must be all 0s
  53  *
  54  * Macro expands to...
  55  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  56  */
  57 static struct pci_device_id e1000_pci_tbl[] = {
  58         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  62         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  65         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  66         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  76         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  78         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  79         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  82         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  83         INTEL_E1000_ETHERNET_DEVICE(0x105E),
  84         INTEL_E1000_ETHERNET_DEVICE(0x105F),
  85         INTEL_E1000_ETHERNET_DEVICE(0x1060),
  86         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  87         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  88         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  89         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  90         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  91         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  92         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  93         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  94         INTEL_E1000_ETHERNET_DEVICE(0x107D),
  95         INTEL_E1000_ETHERNET_DEVICE(0x107E),
  96         INTEL_E1000_ETHERNET_DEVICE(0x107F),
  97         INTEL_E1000_ETHERNET_DEVICE(0x108A),
  98         INTEL_E1000_ETHERNET_DEVICE(0x108B),
  99         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 100         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 101         /* required last entry */
 102         {0,}
 103 };
 104
 105 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 106
 107 int e1000_up(struct e1000_adapter *adapter);
 108 void e1000_down(struct e1000_adapter *adapter);
 109 void e1000_reset(struct e1000_adapter *adapter);
 110 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 111 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 112 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 113 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 114 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 115 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 116                                     struct e1000_tx_ring *txdr);
 117 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 118                                     struct e1000_rx_ring *rxdr);
 119 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 120                                     struct e1000_tx_ring *tx_ring);
 121 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 122                                     struct e1000_rx_ring *rx_ring);
 123 void e1000_update_stats(struct e1000_adapter *adapter);
 124
 125 /* Local Function Prototypes */
 126
 127 static int e1000_init_module(void);
 128 static void e1000_exit_module(void);
 129 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 130 static void __devexit e1000_remove(struct pci_dev *pdev);
 131 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 132 #ifdef CONFIG_E1000_MQ
 133 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
 134 #endif
 135 static int e1000_sw_init(struct e1000_adapter *adapter);
 136 static int e1000_open(struct net_device *netdev);
 137 static int e1000_close(struct net_device *netdev);
 138 static void e1000_configure_tx(struct e1000_adapter *adapter);
 139 static void e1000_configure_rx(struct e1000_adapter *adapter);
 140 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 141 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 142 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 143 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 144                                 struct e1000_tx_ring *tx_ring);
 145 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 146                                 struct e1000_rx_ring *rx_ring);
 147 static void e1000_set_multi(struct net_device *netdev);
 148 static void e1000_update_phy_info(unsigned long data);
 149 static void e1000_watchdog(unsigned long data);
 150 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 151 static void e1000_82547_tx_fifo_stall(unsigned long data);
 152 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 153 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 154 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 155 static int e1000_set_mac(struct net_device *netdev, void *p);
 156 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 157 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 158                                     struct e1000_tx_ring *tx_ring);
 159 #ifdef CONFIG_E1000_NAPI
 160 static int e1000_clean(struct net_device *poll_dev, int *budget);
 161 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 162                                     struct e1000_rx_ring *rx_ring,
 163                                     int *work_done, int work_to_do);
 164 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 165                                        struct e1000_rx_ring *rx_ring,
 166                                        int *work_done, int work_to_do);
 167 #else
 168 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 169                                     struct e1000_rx_ring *rx_ring);
 170 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 171                                        struct e1000_rx_ring *rx_ring);
 172 #endif
 173 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 174                                    struct e1000_rx_ring *rx_ring);
 175 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 176                                       struct e1000_rx_ring *rx_ring);
 177 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 178 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 179                            int cmd);
 180 void e1000_set_ethtool_ops(struct net_device *netdev);
 181 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 182 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 183 static void e1000_tx_timeout(struct net_device *dev);
 184 static void e1000_tx_timeout_task(struct net_device *dev);
 185 static void e1000_smartspeed(struct e1000_adapter *adapter);
 186 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 187                                               struct sk_buff *skb);
 188
 189 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 190 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 191 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 192 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 193
 194 #ifdef CONFIG_PM
 195 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 196 static int e1000_resume(struct pci_dev *pdev);
 197 #endif
 198
 199 #ifdef CONFIG_NET_POLL_CONTROLLER
 200 /* for netdump / net console */
 201 static void e1000_netpoll (struct net_device *netdev);
 202 #endif
 203
 204 #ifdef CONFIG_E1000_MQ
 205 /* for multiple Rx queues */
 206 void e1000_rx_schedule(void *data);
 207 #endif
 208
 209 /* Exported from other modules */
 210
 211 extern void e1000_check_options(struct e1000_adapter *adapter);
 212
 213 static struct pci_driver e1000_driver = {
 214         .name     = e1000_driver_name,
 215         .id_table = e1000_pci_tbl,
 216         .probe    = e1000_probe,
 217         .remove   = __devexit_p(e1000_remove),
 218         /* Power Managment Hooks */
 219 #ifdef CONFIG_PM
 220         .suspend  = e1000_suspend,
 221         .resume   = e1000_resume
 222 #endif
 223 };
 224
 225 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 226 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 227 MODULE_LICENSE("GPL");
 228 MODULE_VERSION(DRV_VERSION);
 229
 230 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 231 module_param(debug, int, 0);
 232 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 233
 234 /**
 235  * e1000_init_module - Driver Registration Routine
 236  *
 237  * e1000_init_module is the first routine called when the driver is
 238  * loaded. All it does is register with the PCI subsystem.
 239  **/
 240
 241 static int __init
 242 e1000_init_module(void)
 243 {
 244         int ret;
 245         printk(KERN_INFO "%s - version %s\n",
 246                e1000_driver_string, e1000_driver_version);
 247
 248         printk(KERN_INFO "%s\n", e1000_copyright);
 249
 250         ret = pci_module_init(&e1000_driver);
 251
 252         return ret;
 253 }
 254
 255 module_init(e1000_init_module);
 256
 257 /**
 258  * e1000_exit_module - Driver Exit Cleanup Routine
 259  *
 260  * e1000_exit_module is called just before the driver is removed
 261  * from memory.
 262  **/
 263
 264 static void __exit
 265 e1000_exit_module(void)
 266 {
 267         pci_unregister_driver(&e1000_driver);
 268 }
 269
 270 module_exit(e1000_exit_module);
 271
 272 /**
 273  * e1000_irq_disable - Mask off interrupt generation on the NIC
 274  * @adapter: board private structure
 275  **/
 276
 277 static inline void
 278 e1000_irq_disable(struct e1000_adapter *adapter)
 279 {
 280         atomic_inc(&adapter->irq_sem);
 281         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 282         E1000_WRITE_FLUSH(&adapter->hw);
 283         synchronize_irq(adapter->pdev->irq);
 284 }
 285
 286 /**
 287  * e1000_irq_enable - Enable default interrupt generation settings
 288  * @adapter: board private structure
 289  **/
 290
 291 static inline void
 292 e1000_irq_enable(struct e1000_adapter *adapter)
 293 {
 294         if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
 295                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 296                 E1000_WRITE_FLUSH(&adapter->hw);
 297         }
 298 }
 299
 300 static void
 301 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 302 {
 303         struct net_device *netdev = adapter->netdev;
 304         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 305         uint16_t old_vid = adapter->mng_vlan_id;
 306         if(adapter->vlgrp) {
 307                 if(!adapter->vlgrp->vlan_devices[vid]) {
 308                         if(adapter->hw.mng_cookie.status &
 309                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 310                                 e1000_vlan_rx_add_vid(netdev, vid);
 311                                 adapter->mng_vlan_id = vid;
 312                         } else
 313                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 314
 315                         if((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 316                                         (vid != old_vid) &&
 317                                         !adapter->vlgrp->vlan_devices[old_vid])
 318                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 319                 }
 320         }
 321 }
 322
 323 /**
 324  * e1000_release_hw_control - release control of the h/w to f/w
 325  * @adapter: address of board private structure
 326  *
 327  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 328  * For ASF and Pass Through versions of f/w this means that the
 329  * driver is no longer loaded. For AMT version (only with 82573) i
 330  * of the f/w this means that the netowrk i/f is closed.
 331  *
 332  **/
 333
 334 static inline void
 335 e1000_release_hw_control(struct e1000_adapter *adapter)
 336 {
 337         uint32_t ctrl_ext;
 338         uint32_t swsm;
 339
 340         /* Let firmware taken over control of h/w */
 341         switch (adapter->hw.mac_type) {
 342         case e1000_82571:
 343         case e1000_82572:
 344                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 345                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 346                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 347                 break;
 348         case e1000_82573:
 349                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 350                 E1000_WRITE_REG(&adapter->hw, SWSM,
 351                                 swsm & ~E1000_SWSM_DRV_LOAD);
 352         default:
 353                 break;
 354         }
 355 }
 356
 357 /**
 358  * e1000_get_hw_control - get control of the h/w from f/w
 359  * @adapter: address of board private structure
 360  *
 361  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 362  * For ASF and Pass Through versions of f/w this means that
 363  * the driver is loaded. For AMT version (only with 82573)
 364  * of the f/w this means that the netowrk i/f is open.
 365  *
 366  **/
 367
 368 static inline void
 369 e1000_get_hw_control(struct e1000_adapter *adapter)
 370 {
 371         uint32_t ctrl_ext;
 372         uint32_t swsm;
 373         /* Let firmware know the driver has taken over */
 374         switch (adapter->hw.mac_type) {
 375         case e1000_82571:
 376         case e1000_82572:
 377                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 378                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 379                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 380                 break;
 381         case e1000_82573:
 382                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 383                 E1000_WRITE_REG(&adapter->hw, SWSM,
 384                                 swsm | E1000_SWSM_DRV_LOAD);
 385                 break;
 386         default:
 387                 break;
 388         }
 389 }
 390
 391 int
 392 e1000_up(struct e1000_adapter *adapter)
 393 {
 394         struct net_device *netdev = adapter->netdev;
 395         int i, err;
 396
 397         /* hardware has been reset, we need to reload some things */
 398
 399         /* Reset the PHY if it was previously powered down */
 400         if(adapter->hw.media_type == e1000_media_type_copper) {
 401                 uint16_t mii_reg;
 402                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 403                 if(mii_reg & MII_CR_POWER_DOWN)
 404                         e1000_phy_reset(&adapter->hw);
 405         }
 406
 407         e1000_set_multi(netdev);
 408
 409         e1000_restore_vlan(adapter);
 410
 411         e1000_configure_tx(adapter);
 412         e1000_setup_rctl(adapter);
 413         e1000_configure_rx(adapter);
 414         for (i = 0; i < adapter->num_rx_queues; i++) {
 415                 adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]);
 416         }
 417
 418 #ifdef CONFIG_PCI_MSI
 419         if(adapter->hw.mac_type > e1000_82547_rev_2) {
 420                 adapter->have_msi = TRUE;
 421                 if((err = pci_enable_msi(adapter->pdev))) {
 422                         DPRINTK(PROBE, ERR,
 423                          "Unable to allocate MSI interrupt Error: %d\n", err);
 424                         adapter->have_msi = FALSE;
 425                 }
 426         }
 427 #endif
 428         if((err = request_irq(adapter->pdev->irq, &e1000_intr,
 429                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 430                               netdev->name, netdev))) {
 431                 DPRINTK(PROBE, ERR,
 432                     "Unable to allocate interrupt Error: %d\n", err);
 433                 return err;
 434         }
 435
 436 #ifdef CONFIG_E1000_MQ
 437         e1000_setup_queue_mapping(adapter);
 438 #endif
 439
 440         adapter->tx_queue_len = netdev->tx_queue_len;
 441
 442         mod_timer(&adapter->watchdog_timer, jiffies);
 443
 444 #ifdef CONFIG_E1000_NAPI
 445         netif_poll_enable(netdev);
 446 #endif
 447         e1000_irq_enable(adapter);
 448
 449         return 0;
 450 }
 451
 452 void
 453 e1000_down(struct e1000_adapter *adapter)
 454 {
 455         struct net_device *netdev = adapter->netdev;
 456         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 457                                      e1000_check_mng_mode(&adapter->hw);
 458
 459         e1000_irq_disable(adapter);
 460 #ifdef CONFIG_E1000_MQ
 461         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 462 #endif
 463         free_irq(adapter->pdev->irq, netdev);
 464 #ifdef CONFIG_PCI_MSI
 465         if(adapter->hw.mac_type > e1000_82547_rev_2 &&
 466            adapter->have_msi == TRUE)
 467                 pci_disable_msi(adapter->pdev);
 468 #endif
 469         del_timer_sync(&adapter->tx_fifo_stall_timer);
 470         del_timer_sync(&adapter->watchdog_timer);
 471         del_timer_sync(&adapter->phy_info_timer);
 472
 473 #ifdef CONFIG_E1000_NAPI
 474         netif_poll_disable(netdev);
 475 #endif
 476         netdev->tx_queue_len = adapter->tx_queue_len;
 477         adapter->link_speed = 0;
 478         adapter->link_duplex = 0;
 479         netif_carrier_off(netdev);
 480         netif_stop_queue(netdev);
 481
 482         e1000_reset(adapter);
 483         e1000_clean_all_tx_rings(adapter);
 484         e1000_clean_all_rx_rings(adapter);
 485
 486         /* Power down the PHY so no link is implied when interface is down *
 487          * The PHY cannot be powered down if any of the following is TRUE *
 488          * (a) WoL is enabled
 489          * (b) AMT is active
 490          * (c) SoL/IDER session is active */
 491         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 492            adapter->hw.media_type == e1000_media_type_copper &&
 493            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 494            !mng_mode_enabled &&
 495            !e1000_check_phy_reset_block(&adapter->hw)) {
 496                 uint16_t mii_reg;
 497                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 498                 mii_reg |= MII_CR_POWER_DOWN;
 499                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 500                 mdelay(1);
 501         }
 502 }
 503
 504 void
 505 e1000_reset(struct e1000_adapter *adapter)
 506 {
 507         uint32_t pba, manc;
 508         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 509
 510         /* Repartition Pba for greater than 9k mtu
 511          * To take effect CTRL.RST is required.
 512          */
 513
 514         switch (adapter->hw.mac_type) {
 515         case e1000_82547:
 516         case e1000_82547_rev_2:
 517                 pba = E1000_PBA_30K;
 518                 break;
 519         case e1000_82571:
 520         case e1000_82572:
 521                 pba = E1000_PBA_38K;
 522                 break;
 523         case e1000_82573:
 524                 pba = E1000_PBA_12K;
 525                 break;
 526         default:
 527                 pba = E1000_PBA_48K;
 528                 break;
 529         }
 530
 531         if((adapter->hw.mac_type != e1000_82573) &&
 532            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 533                 pba -= 8; /* allocate more FIFO for Tx */
 534
 535
 536         if(adapter->hw.mac_type == e1000_82547) {
 537                 adapter->tx_fifo_head = 0;
 538                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 539                 adapter->tx_fifo_size =
 540                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 541                 atomic_set(&adapter->tx_fifo_stall, 0);
 542         }
 543
 544         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 545
 546         /* flow control settings */
 547         /* Set the FC high water mark to 90% of the FIFO size.
 548          * Required to clear last 3 LSB */
 549         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 550
 551         adapter->hw.fc_high_water = fc_high_water_mark;
 552         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 553         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 554         adapter->hw.fc_send_xon = 1;
 555         adapter->hw.fc = adapter->hw.original_fc;
 556
 557         /* Allow time for pending master requests to run */
 558         e1000_reset_hw(&adapter->hw);
 559         if(adapter->hw.mac_type >= e1000_82544)
 560                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 561         if(e1000_init_hw(&adapter->hw))
 562                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 563         e1000_update_mng_vlan(adapter);
 564         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 565         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 566
 567         e1000_reset_adaptive(&adapter->hw);
 568         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 569         if (adapter->en_mng_pt) {
 570                 manc = E1000_READ_REG(&adapter->hw, MANC);
 571                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 572                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 573         }
 574 }
 575
 576 /**
 577  * e1000_probe - Device Initialization Routine
 578  * @pdev: PCI device information struct
 579  * @ent: entry in e1000_pci_tbl
 580  *
 581  * Returns 0 on success, negative on failure
 582  *
 583  * e1000_probe initializes an adapter identified by a pci_dev structure.
 584  * The OS initialization, configuring of the adapter private structure,
 585  * and a hardware reset occur.
 586  **/
 587
 588 static int __devinit
 589 e1000_probe(struct pci_dev *pdev,
 590             const struct pci_device_id *ent)
 591 {
 592         struct net_device *netdev;
 593         struct e1000_adapter *adapter;
 594         unsigned long mmio_start, mmio_len;
 595
 596         static int cards_found = 0;
 597         int i, err, pci_using_dac;
 598         uint16_t eeprom_data;
 599         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 600         if((err = pci_enable_device(pdev)))
 601                 return err;
 602
 603         if(!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 604                 pci_using_dac = 1;
 605         } else {
 606                 if((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 607                         E1000_ERR("No usable DMA configuration, aborting\n");
 608                         return err;
 609                 }
 610                 pci_using_dac = 0;
 611         }
 612
 613         if((err = pci_request_regions(pdev, e1000_driver_name)))
 614                 return err;
 615
 616         pci_set_master(pdev);
 617
 618         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 619         if(!netdev) {
 620                 err = -ENOMEM;
 621                 goto err_alloc_etherdev;
 622         }
 623
 624         SET_MODULE_OWNER(netdev);
 625         SET_NETDEV_DEV(netdev, &pdev->dev);
 626
 627         pci_set_drvdata(pdev, netdev);
 628         adapter = netdev_priv(netdev);
 629         adapter->netdev = netdev;
 630         adapter->pdev = pdev;
 631         adapter->hw.back = adapter;
 632         adapter->msg_enable = (1 << debug) - 1;
 633
 634         mmio_start = pci_resource_start(pdev, BAR_0);
 635         mmio_len = pci_resource_len(pdev, BAR_0);
 636
 637         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 638         if(!adapter->hw.hw_addr) {
 639                 err = -EIO;
 640                 goto err_ioremap;
 641         }
 642
 643         for(i = BAR_1; i <= BAR_5; i++) {
 644                 if(pci_resource_len(pdev, i) == 0)
 645                         continue;
 646                 if(pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 647                         adapter->hw.io_base = pci_resource_start(pdev, i);
 648                         break;
 649                 }
 650         }
 651
 652         netdev->open = &e1000_open;
 653         netdev->stop = &e1000_close;
 654         netdev->hard_start_xmit = &e1000_xmit_frame;
 655         netdev->get_stats = &e1000_get_stats;
 656         netdev->set_multicast_list = &e1000_set_multi;
 657         netdev->set_mac_address = &e1000_set_mac;
 658         netdev->change_mtu = &e1000_change_mtu;
 659         netdev->do_ioctl = &e1000_ioctl;
 660         e1000_set_ethtool_ops(netdev);
 661         netdev->tx_timeout = &e1000_tx_timeout;
 662         netdev->watchdog_timeo = 5 * HZ;
 663 #ifdef CONFIG_E1000_NAPI
 664         netdev->poll = &e1000_clean;
 665         netdev->weight = 64;
 666 #endif
 667         netdev->vlan_rx_register = e1000_vlan_rx_register;
 668         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 669         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 670 #ifdef CONFIG_NET_POLL_CONTROLLER
 671         netdev->poll_controller = e1000_netpoll;
 672 #endif
 673         strcpy(netdev->name, pci_name(pdev));
 674
 675         netdev->mem_start = mmio_start;
 676         netdev->mem_end = mmio_start + mmio_len;
 677         netdev->base_addr = adapter->hw.io_base;
 678
 679         adapter->bd_number = cards_found;
 680
 681         /* setup the private structure */
 682
 683         if((err = e1000_sw_init(adapter)))
 684                 goto err_sw_init;
 685
 686         if((err = e1000_check_phy_reset_block(&adapter->hw)))
 687                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 688
 689         if(adapter->hw.mac_type >= e1000_82543) {
 690                 netdev->features = NETIF_F_SG |
 691                                    NETIF_F_HW_CSUM |
 692                                    NETIF_F_HW_VLAN_TX |
 693                                    NETIF_F_HW_VLAN_RX |
 694                                    NETIF_F_HW_VLAN_FILTER;
 695         }
 696
 697 #ifdef NETIF_F_TSO
 698         if((adapter->hw.mac_type >= e1000_82544) &&
 699            (adapter->hw.mac_type != e1000_82547))
 700                 netdev->features |= NETIF_F_TSO;
 701
 702 #ifdef NETIF_F_TSO_IPV6
 703         if(adapter->hw.mac_type > e1000_82547_rev_2)
 704                 netdev->features |= NETIF_F_TSO_IPV6;
 705 #endif
 706 #endif
 707         if(pci_using_dac)
 708                 netdev->features |= NETIF_F_HIGHDMA;
 709
 710         /* hard_start_xmit is safe against parallel locking */
 711         netdev->features |= NETIF_F_LLTX;
 712
 713         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 714
 715         /* before reading the EEPROM, reset the controller to
 716          * put the device in a known good starting state */
 717
 718         e1000_reset_hw(&adapter->hw);
 719
 720         /* make sure the EEPROM is good */
 721
 722         if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 723                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 724                 err = -EIO;
 725                 goto err_eeprom;
 726         }
 727
 728         /* copy the MAC address out of the EEPROM */
 729
 730         if(e1000_read_mac_addr(&adapter->hw))
 731                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 732         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 733         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 734
 735         if(!is_valid_ether_addr(netdev->perm_addr)) {
 736                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 737                 err = -EIO;
 738                 goto err_eeprom;
 739         }
 740
 741         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 742
 743         e1000_get_bus_info(&adapter->hw);
 744
 745         init_timer(&adapter->tx_fifo_stall_timer);
 746         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 747         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 748
 749         init_timer(&adapter->watchdog_timer);
 750         adapter->watchdog_timer.function = &e1000_watchdog;
 751         adapter->watchdog_timer.data = (unsigned long) adapter;
 752
 753         INIT_WORK(&adapter->watchdog_task,
 754                 (void (*)(void *))e1000_watchdog_task, adapter);
 755
 756         init_timer(&adapter->phy_info_timer);
 757         adapter->phy_info_timer.function = &e1000_update_phy_info;
 758         adapter->phy_info_timer.data = (unsigned long) adapter;
 759
 760         INIT_WORK(&adapter->tx_timeout_task,
 761                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 762
 763         /* we're going to reset, so assume we have no link for now */
 764
 765         netif_carrier_off(netdev);
 766         netif_stop_queue(netdev);
 767
 768         e1000_check_options(adapter);
 769
 770         /* Initial Wake on LAN setting
 771          * If APM wake is enabled in the EEPROM,
 772          * enable the ACPI Magic Packet filter
 773          */
 774
 775         switch(adapter->hw.mac_type) {
 776         case e1000_82542_rev2_0:
 777         case e1000_82542_rev2_1:
 778         case e1000_82543:
 779                 break;
 780         case e1000_82544:
 781                 e1000_read_eeprom(&adapter->hw,
 782                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 783                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 784                 break;
 785         case e1000_82546:
 786         case e1000_82546_rev_3:
 787         case e1000_82571:
 788                 if((E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
 789                    && (adapter->hw.media_type == e1000_media_type_copper)) {
 790                         e1000_read_eeprom(&adapter->hw,
 791                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 792                         break;
 793                 }
 794                 /* Fall Through */
 795         default:
 796                 e1000_read_eeprom(&adapter->hw,
 797                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 798                 break;
 799         }
 800         if(eeprom_data & eeprom_apme_mask)
 801                 adapter->wol |= E1000_WUFC_MAG;
 802
 803         /* reset the hardware with the new settings */
 804         e1000_reset(adapter);
 805
 806         /* If the controller is 82573 and f/w is AMT, do not set
 807          * DRV_LOAD until the interface is up.  For all other cases,
 808          * let the f/w know that the h/w is now under the control
 809          * of the driver. */
 810         if (adapter->hw.mac_type != e1000_82573 ||
 811             !e1000_check_mng_mode(&adapter->hw))
 812                 e1000_get_hw_control(adapter);
 813
 814         strcpy(netdev->name, "eth%d");
 815         if((err = register_netdev(netdev)))
 816                 goto err_register;
 817
 818         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 819
 820         cards_found++;
 821         return 0;
 822
 823 err_register:
 824 err_sw_init:
 825 err_eeprom:
 826         iounmap(adapter->hw.hw_addr);
 827 err_ioremap:
 828         free_netdev(netdev);
 829 err_alloc_etherdev:
 830         pci_release_regions(pdev);
 831         return err;
 832 }
 833
 834 /**
 835  * e1000_remove - Device Removal Routine
 836  * @pdev: PCI device information struct
 837  *
 838  * e1000_remove is called by the PCI subsystem to alert the driver
 839  * that it should release a PCI device.  The could be caused by a
 840  * Hot-Plug event, or because the driver is going to be removed from
 841  * memory.
 842  **/
 843
 844 static void __devexit
 845 e1000_remove(struct pci_dev *pdev)
 846 {
 847         struct net_device *netdev = pci_get_drvdata(pdev);
 848         struct e1000_adapter *adapter = netdev_priv(netdev);
 849         uint32_t manc;
 850 #ifdef CONFIG_E1000_NAPI
 851         int i;
 852 #endif
 853
 854         flush_scheduled_work();
 855
 856         if(adapter->hw.mac_type >= e1000_82540 &&
 857            adapter->hw.media_type == e1000_media_type_copper) {
 858                 manc = E1000_READ_REG(&adapter->hw, MANC);
 859                 if(manc & E1000_MANC_SMBUS_EN) {
 860                         manc |= E1000_MANC_ARP_EN;
 861                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 862                 }
 863         }
 864
 865         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 866          * would have already happened in close and is redundant. */
 867         e1000_release_hw_control(adapter);
 868
 869         unregister_netdev(netdev);
 870 #ifdef CONFIG_E1000_NAPI
 871         for (i = 0; i < adapter->num_rx_queues; i++)
 872                 __dev_put(&adapter->polling_netdev[i]);
 873 #endif
 874
 875         if(!e1000_check_phy_reset_block(&adapter->hw))
 876                 e1000_phy_hw_reset(&adapter->hw);
 877
 878         kfree(adapter->tx_ring);
 879         kfree(adapter->rx_ring);
 880 #ifdef CONFIG_E1000_NAPI
 881         kfree(adapter->polling_netdev);
 882 #endif
 883
 884         iounmap(adapter->hw.hw_addr);
 885         pci_release_regions(pdev);
 886
 887 #ifdef CONFIG_E1000_MQ
 888         free_percpu(adapter->cpu_netdev);
 889         free_percpu(adapter->cpu_tx_ring);
 890 #endif
 891         free_netdev(netdev);
 892
 893         pci_disable_device(pdev);
 894 }
 895
 896 /**
 897  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 898  * @adapter: board private structure to initialize
 899  *
 900  * e1000_sw_init initializes the Adapter private data structure.
 901  * Fields are initialized based on PCI device information and
 902  * OS network device settings (MTU size).
 903  **/
 904
 905 static int __devinit
 906 e1000_sw_init(struct e1000_adapter *adapter)
 907 {
 908         struct e1000_hw *hw = &adapter->hw;
 909         struct net_device *netdev = adapter->netdev;
 910         struct pci_dev *pdev = adapter->pdev;
 911 #ifdef CONFIG_E1000_NAPI
 912         int i;
 913 #endif
 914
 915         /* PCI config space info */
 916
 917         hw->vendor_id = pdev->vendor;
 918         hw->device_id = pdev->device;
 919         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 920         hw->subsystem_id = pdev->subsystem_device;
 921
 922         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
 923
 924         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
 925
 926         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 927         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
 928         hw->max_frame_size = netdev->mtu +
 929                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
 930         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
 931
 932         /* identify the MAC */
 933
 934         if(e1000_set_mac_type(hw)) {
 935                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
 936                 return -EIO;
 937         }
 938
 939         /* initialize eeprom parameters */
 940
 941         if(e1000_init_eeprom_params(hw)) {
 942                 E1000_ERR("EEPROM initialization failed\n");
 943                 return -EIO;
 944         }
 945
 946         switch(hw->mac_type) {
 947         default:
 948                 break;
 949         case e1000_82541:
 950         case e1000_82547:
 951         case e1000_82541_rev_2:
 952         case e1000_82547_rev_2:
 953                 hw->phy_init_script = 1;
 954                 break;
 955         }
 956
 957         e1000_set_media_type(hw);
 958
 959         hw->wait_autoneg_complete = FALSE;
 960         hw->tbi_compatibility_en = TRUE;
 961         hw->adaptive_ifs = TRUE;
 962
 963         /* Copper options */
 964
 965         if(hw->media_type == e1000_media_type_copper) {
 966                 hw->mdix = AUTO_ALL_MODES;
 967                 hw->disable_polarity_correction = FALSE;
 968                 hw->master_slave = E1000_MASTER_SLAVE;
 969         }
 970
 971 #ifdef CONFIG_E1000_MQ
 972         /* Number of supported queues */
 973         switch (hw->mac_type) {
 974         case e1000_82571:
 975         case e1000_82572:
 976                 /* These controllers support 2 tx queues, but with a single
 977                  * qdisc implementation, multiple tx queues aren't quite as
 978                  * interesting.  If we can find a logical way of mapping
 979                  * flows to a queue, then perhaps we can up the num_tx_queue
 980                  * count back to its default.  Until then, we run the risk of
 981                  * terrible performance due to SACK overload. */
 982                 adapter->num_tx_queues = 1;
 983                 adapter->num_rx_queues = 2;
 984                 break;
 985         default:
 986                 adapter->num_tx_queues = 1;
 987                 adapter->num_rx_queues = 1;
 988                 break;
 989         }
 990         adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
 991         adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
 992         DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
 993                 adapter->num_rx_queues,
 994                 ((adapter->num_rx_queues == 1)
 995                  ? ((num_online_cpus() > 1)
 996                         ? "(due to unsupported feature in current adapter)"
 997                         : "(due to unsupported system configuration)")
 998                  : ""));
 999         DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
1000                 adapter->num_tx_queues);
1001 #else
1002         adapter->num_tx_queues = 1;
1003         adapter->num_rx_queues = 1;
1004 #endif
1005
1006         if (e1000_alloc_queues(adapter)) {
1007                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1008                 return -ENOMEM;
1009         }
1010
1011 #ifdef CONFIG_E1000_NAPI
1012         for (i = 0; i < adapter->num_rx_queues; i++) {
1013                 adapter->polling_netdev[i].priv = adapter;
1014                 adapter->polling_netdev[i].poll = &e1000_clean;
1015                 adapter->polling_netdev[i].weight = 64;
1016                 dev_hold(&adapter->polling_netdev[i]);
1017                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1018         }
1019         spin_lock_init(&adapter->tx_queue_lock);
1020 #endif
1021
1022         atomic_set(&adapter->irq_sem, 1);
1023         spin_lock_init(&adapter->stats_lock);
1024
1025         return 0;
1026 }
1027
1028 /**
1029  * e1000_alloc_queues - Allocate memory for all rings
1030  * @adapter: board private structure to initialize
1031  *
1032  * We allocate one ring per queue at run-time since we don't know the
1033  * number of queues at compile-time.  The polling_netdev array is
1034  * intended for Multiqueue, but should work fine with a single queue.
1035  **/
1036
1037 static int __devinit
1038 e1000_alloc_queues(struct e1000_adapter *adapter)
1039 {
1040         int size;
1041
1042         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1043         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1044         if (!adapter->tx_ring)
1045                 return -ENOMEM;
1046         memset(adapter->tx_ring, 0, size);
1047
1048         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1049         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1050         if (!adapter->rx_ring) {
1051                 kfree(adapter->tx_ring);
1052                 return -ENOMEM;
1053         }
1054         memset(adapter->rx_ring, 0, size);
1055
1056 #ifdef CONFIG_E1000_NAPI
1057         size = sizeof(struct net_device) * adapter->num_rx_queues;
1058         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1059         if (!adapter->polling_netdev) {
1060                 kfree(adapter->tx_ring);
1061                 kfree(adapter->rx_ring);
1062                 return -ENOMEM;
1063         }
1064         memset(adapter->polling_netdev, 0, size);
1065 #endif
1066
1067 #ifdef CONFIG_E1000_MQ
1068         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1069         adapter->rx_sched_call_data.info = adapter->netdev;
1070
1071         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1072         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1073 #endif
1074
1075         return E1000_SUCCESS;
1076 }
1077
1078 #ifdef CONFIG_E1000_MQ
1079 static void __devinit
1080 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1081 {
1082         int i, cpu;
1083
1084         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1085         adapter->rx_sched_call_data.info = adapter->netdev;
1086         cpus_clear(adapter->rx_sched_call_data.cpumask);
1087
1088         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1089         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1090
1091         lock_cpu_hotplug();
1092         i = 0;
1093         for_each_online_cpu(cpu) {
1094                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_tx_queues];
1095                 /* This is incomplete because we'd like to assign separate
1096                  * physical cpus to these netdev polling structures and
1097                  * avoid saturating a subset of cpus.
1098                  */
1099                 if (i < adapter->num_rx_queues) {
1100                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1101                         adapter->rx_ring[i].cpu = cpu;
1102                         cpu_set(cpu, adapter->cpumask);
1103                 } else
1104                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1105
1106                 i++;
1107         }
1108         unlock_cpu_hotplug();
1109 }
1110 #endif
1111
1112 /**
1113  * e1000_open - Called when a network interface is made active
1114  * @netdev: network interface device structure
1115  *
1116  * Returns 0 on success, negative value on failure
1117  *
1118  * The open entry point is called when a network interface is made
1119  * active by the system (IFF_UP).  At this point all resources needed
1120  * for transmit and receive operations are allocated, the interrupt
1121  * handler is registered with the OS, the watchdog timer is started,
1122  * and the stack is notified that the interface is ready.
1123  **/
1124
1125 static int
1126 e1000_open(struct net_device *netdev)
1127 {
1128         struct e1000_adapter *adapter = netdev_priv(netdev);
1129         int err;
1130
1131         /* allocate transmit descriptors */
1132
1133         if ((err = e1000_setup_all_tx_resources(adapter)))
1134                 goto err_setup_tx;
1135
1136         /* allocate receive descriptors */
1137
1138         if ((err = e1000_setup_all_rx_resources(adapter)))
1139                 goto err_setup_rx;
1140
1141         if((err = e1000_up(adapter)))
1142                 goto err_up;
1143         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1144         if((adapter->hw.mng_cookie.status &
1145                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1146                 e1000_update_mng_vlan(adapter);
1147         }
1148
1149         /* If AMT is enabled, let the firmware know that the network
1150          * interface is now open */
1151         if (adapter->hw.mac_type == e1000_82573 &&
1152             e1000_check_mng_mode(&adapter->hw))
1153                 e1000_get_hw_control(adapter);
1154
1155         return E1000_SUCCESS;
1156
1157 err_up:
1158         e1000_free_all_rx_resources(adapter);
1159 err_setup_rx:
1160         e1000_free_all_tx_resources(adapter);
1161 err_setup_tx:
1162         e1000_reset(adapter);
1163
1164         return err;
1165 }
1166
1167 /**
1168  * e1000_close - Disables a network interface
1169  * @netdev: network interface device structure
1170  *
1171  * Returns 0, this is not allowed to fail
1172  *
1173  * The close entry point is called when an interface is de-activated
1174  * by the OS.  The hardware is still under the drivers control, but
1175  * needs to be disabled.  A global MAC reset is issued to stop the
1176  * hardware, and all transmit and receive resources are freed.
1177  **/
1178
1179 static int
1180 e1000_close(struct net_device *netdev)
1181 {
1182         struct e1000_adapter *adapter = netdev_priv(netdev);
1183
1184         e1000_down(adapter);
1185
1186         e1000_free_all_tx_resources(adapter);
1187         e1000_free_all_rx_resources(adapter);
1188
1189         if((adapter->hw.mng_cookie.status &
1190                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1191                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1192         }
1193
1194         /* If AMT is enabled, let the firmware know that the network
1195          * interface is now closed */
1196         if (adapter->hw.mac_type == e1000_82573 &&
1197             e1000_check_mng_mode(&adapter->hw))
1198                 e1000_release_hw_control(adapter);
1199
1200         return 0;
1201 }
1202
1203 /**
1204  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1205  * @adapter: address of board private structure
1206  * @start: address of beginning of memory
1207  * @len: length of memory
1208  **/
1209 static inline boolean_t
1210 e1000_check_64k_bound(struct e1000_adapter *adapter,
1211                       void *start, unsigned long len)
1212 {
1213         unsigned long begin = (unsigned long) start;
1214         unsigned long end = begin + len;
1215
1216         /* First rev 82545 and 82546 need to not allow any memory
1217          * write location to cross 64k boundary due to errata 23 */
1218         if (adapter->hw.mac_type == e1000_82545 ||
1219             adapter->hw.mac_type == e1000_82546) {
1220                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1221         }
1222
1223         return TRUE;
1224 }
1225
1226 /**
1227  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1228  * @adapter: board private structure
1229  * @txdr:    tx descriptor ring (for a specific queue) to setup
1230  *
1231  * Return 0 on success, negative on failure
1232  **/
1233
1234 static int
1235 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1236                          struct e1000_tx_ring *txdr)
1237 {
1238         struct pci_dev *pdev = adapter->pdev;
1239         int size;
1240
1241         size = sizeof(struct e1000_buffer) * txdr->count;
1242
1243         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1244         if(!txdr->buffer_info) {
1245                 DPRINTK(PROBE, ERR,
1246                 "Unable to allocate memory for the transmit descriptor ring\n");
1247                 return -ENOMEM;
1248         }
1249         memset(txdr->buffer_info, 0, size);
1250
1251         /* round up to nearest 4K */
1252
1253         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1254         E1000_ROUNDUP(txdr->size, 4096);
1255
1256         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1257         if(!txdr->desc) {
1258 setup_tx_desc_die:
1259                 vfree(txdr->buffer_info);
1260                 DPRINTK(PROBE, ERR,
1261                 "Unable to allocate memory for the transmit descriptor ring\n");
1262                 return -ENOMEM;
1263         }
1264
1265         /* Fix for errata 23, can't cross 64kB boundary */
1266         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1267                 void *olddesc = txdr->desc;
1268                 dma_addr_t olddma = txdr->dma;
1269                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1270                                      "at %p\n", txdr->size, txdr->desc);
1271                 /* Try again, without freeing the previous */
1272                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1273                 if(!txdr->desc) {
1274                 /* Failed allocation, critical failure */
1275                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1276                         goto setup_tx_desc_die;
1277                 }
1278
1279                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1280                         /* give up */
1281                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1282                                             txdr->dma);
1283                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1284                         DPRINTK(PROBE, ERR,
1285                                 "Unable to allocate aligned memory "
1286                                 "for the transmit descriptor ring\n");
1287                         vfree(txdr->buffer_info);
1288                         return -ENOMEM;
1289                 } else {
1290                         /* Free old allocation, new allocation was successful */
1291                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1292                 }
1293         }
1294         memset(txdr->desc, 0, txdr->size);
1295
1296         txdr->next_to_use = 0;
1297         txdr->next_to_clean = 0;
1298         spin_lock_init(&txdr->tx_lock);
1299
1300         return 0;
1301 }
1302
1303 /**
1304  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1305  *                                (Descriptors) for all queues
1306  * @adapter: board private structure
1307  *
1308  * If this function returns with an error, then it's possible one or
1309  * more of the rings is populated (while the rest are not).  It is the
1310  * callers duty to clean those orphaned rings.
1311  *
1312  * Return 0 on success, negative on failure
1313  **/
1314
1315 int
1316 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1317 {
1318         int i, err = 0;
1319
1320         for (i = 0; i < adapter->num_tx_queues; i++) {
1321                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1322                 if (err) {
1323                         DPRINTK(PROBE, ERR,
1324                                 "Allocation for Tx Queue %u failed\n", i);
1325                         break;
1326                 }
1327         }
1328
1329         return err;
1330 }
1331
1332 /**
1333  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1334  * @adapter: board private structure
1335  *
1336  * Configure the Tx unit of the MAC after a reset.
1337  **/
1338
1339 static void
1340 e1000_configure_tx(struct e1000_adapter *adapter)
1341 {
1342         uint64_t tdba;
1343         struct e1000_hw *hw = &adapter->hw;
1344         uint32_t tdlen, tctl, tipg, tarc;
1345         uint32_t ipgr1, ipgr2;
1346
1347         /* Setup the HW Tx Head and Tail descriptor pointers */
1348
1349         switch (adapter->num_tx_queues) {
1350         case 2:
1351                 tdba = adapter->tx_ring[1].dma;
1352                 tdlen = adapter->tx_ring[1].count *
1353                         sizeof(struct e1000_tx_desc);
1354                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1355                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1356                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1357                 E1000_WRITE_REG(hw, TDH1, 0);
1358                 E1000_WRITE_REG(hw, TDT1, 0);
1359                 adapter->tx_ring[1].tdh = E1000_TDH1;
1360                 adapter->tx_ring[1].tdt = E1000_TDT1;
1361                 /* Fall Through */
1362         case 1:
1363         default:
1364                 tdba = adapter->tx_ring[0].dma;
1365                 tdlen = adapter->tx_ring[0].count *
1366                         sizeof(struct e1000_tx_desc);
1367                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1368                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1369                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1370                 E1000_WRITE_REG(hw, TDH, 0);
1371                 E1000_WRITE_REG(hw, TDT, 0);
1372                 adapter->tx_ring[0].tdh = E1000_TDH;
1373                 adapter->tx_ring[0].tdt = E1000_TDT;
1374                 break;
1375         }
1376
1377         /* Set the default values for the Tx Inter Packet Gap timer */
1378
1379         if (hw->media_type == e1000_media_type_fiber ||
1380             hw->media_type == e1000_media_type_internal_serdes)
1381                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1382         else
1383                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1384
1385         switch (hw->mac_type) {
1386         case e1000_82542_rev2_0:
1387         case e1000_82542_rev2_1:
1388                 tipg = DEFAULT_82542_TIPG_IPGT;
1389                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1390                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1391                 break;
1392         default:
1393                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1394                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1395                 break;
1396         }
1397         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1398         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1399         E1000_WRITE_REG(hw, TIPG, tipg);
1400
1401         /* Set the Tx Interrupt Delay register */
1402
1403         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1404         if (hw->mac_type >= e1000_82540)
1405                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1406
1407         /* Program the Transmit Control Register */
1408
1409         tctl = E1000_READ_REG(hw, TCTL);
1410
1411         tctl &= ~E1000_TCTL_CT;
1412         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1413                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1414
1415         E1000_WRITE_REG(hw, TCTL, tctl);
1416
1417         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1418                 tarc = E1000_READ_REG(hw, TARC0);
1419                 tarc |= ((1 << 25) | (1 << 21));
1420                 E1000_WRITE_REG(hw, TARC0, tarc);
1421                 tarc = E1000_READ_REG(hw, TARC1);
1422                 tarc |= (1 << 25);
1423                 if (tctl & E1000_TCTL_MULR)
1424                         tarc &= ~(1 << 28);
1425                 else
1426                         tarc |= (1 << 28);
1427                 E1000_WRITE_REG(hw, TARC1, tarc);
1428         }
1429
1430         e1000_config_collision_dist(hw);
1431
1432         /* Setup Transmit Descriptor Settings for eop descriptor */
1433         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1434                 E1000_TXD_CMD_IFCS;
1435
1436         if (hw->mac_type < e1000_82543)
1437                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1438         else
1439                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1440
1441         /* Cache if we're 82544 running in PCI-X because we'll
1442          * need this to apply a workaround later in the send path. */
1443         if (hw->mac_type == e1000_82544 &&
1444             hw->bus_type == e1000_bus_type_pcix)
1445                 adapter->pcix_82544 = 1;
1446 }
1447
1448 /**
1449  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1450  * @adapter: board private structure
1451  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1452  *
1453  * Returns 0 on success, negative on failure
1454  **/
1455
1456 static int
1457 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1458                          struct e1000_rx_ring *rxdr)
1459 {
1460         struct pci_dev *pdev = adapter->pdev;
1461         int size, desc_len;
1462
1463         size = sizeof(struct e1000_buffer) * rxdr->count;
1464         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1465         if (!rxdr->buffer_info) {
1466                 DPRINTK(PROBE, ERR,
1467                 "Unable to allocate memory for the receive descriptor ring\n");
1468                 return -ENOMEM;
1469         }
1470         memset(rxdr->buffer_info, 0, size);
1471
1472         size = sizeof(struct e1000_ps_page) * rxdr->count;
1473         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1474         if(!rxdr->ps_page) {
1475                 vfree(rxdr->buffer_info);
1476                 DPRINTK(PROBE, ERR,
1477                 "Unable to allocate memory for the receive descriptor ring\n");
1478                 return -ENOMEM;
1479         }
1480         memset(rxdr->ps_page, 0, size);
1481
1482         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1483         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1484         if(!rxdr->ps_page_dma) {
1485                 vfree(rxdr->buffer_info);
1486                 kfree(rxdr->ps_page);
1487                 DPRINTK(PROBE, ERR,
1488                 "Unable to allocate memory for the receive descriptor ring\n");
1489                 return -ENOMEM;
1490         }
1491         memset(rxdr->ps_page_dma, 0, size);
1492
1493         if(adapter->hw.mac_type <= e1000_82547_rev_2)
1494                 desc_len = sizeof(struct e1000_rx_desc);
1495         else
1496                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1497
1498         /* Round up to nearest 4K */
1499
1500         rxdr->size = rxdr->count * desc_len;
1501         E1000_ROUNDUP(rxdr->size, 4096);
1502
1503         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1504
1505         if (!rxdr->desc) {
1506                 DPRINTK(PROBE, ERR,
1507                 "Unable to allocate memory for the receive descriptor ring\n");
1508 setup_rx_desc_die:
1509                 vfree(rxdr->buffer_info);
1510                 kfree(rxdr->ps_page);
1511                 kfree(rxdr->ps_page_dma);
1512                 return -ENOMEM;
1513         }
1514
1515         /* Fix for errata 23, can't cross 64kB boundary */
1516         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1517                 void *olddesc = rxdr->desc;
1518                 dma_addr_t olddma = rxdr->dma;
1519                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1520                                      "at %p\n", rxdr->size, rxdr->desc);
1521                 /* Try again, without freeing the previous */
1522                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1523                 /* Failed allocation, critical failure */
1524                 if (!rxdr->desc) {
1525                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1526                         DPRINTK(PROBE, ERR,
1527                                 "Unable to allocate memory "
1528                                 "for the receive descriptor ring\n");
1529                         goto setup_rx_desc_die;
1530                 }
1531
1532                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1533                         /* give up */
1534                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1535                                             rxdr->dma);
1536                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1537                         DPRINTK(PROBE, ERR,
1538                                 "Unable to allocate aligned memory "
1539                                 "for the receive descriptor ring\n");
1540                         goto setup_rx_desc_die;
1541                 } else {
1542                         /* Free old allocation, new allocation was successful */
1543                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1544                 }
1545         }
1546         memset(rxdr->desc, 0, rxdr->size);
1547
1548         rxdr->next_to_clean = 0;
1549         rxdr->next_to_use = 0;
1550         rxdr->rx_skb_top = NULL;
1551         rxdr->rx_skb_prev = NULL;
1552
1553         return 0;
1554 }
1555
1556 /**
1557  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1558  *                                (Descriptors) for all queues
1559  * @adapter: board private structure
1560  *
1561  * If this function returns with an error, then it's possible one or
1562  * more of the rings is populated (while the rest are not).  It is the
1563  * callers duty to clean those orphaned rings.
1564  *
1565  * Return 0 on success, negative on failure
1566  **/
1567
1568 int
1569 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1570 {
1571         int i, err = 0;
1572
1573         for (i = 0; i < adapter->num_rx_queues; i++) {
1574                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1575                 if (err) {
1576                         DPRINTK(PROBE, ERR,
1577                                 "Allocation for Rx Queue %u failed\n", i);
1578                         break;
1579                 }
1580         }
1581
1582         return err;
1583 }
1584
1585 /**
1586  * e1000_setup_rctl - configure the receive control registers
1587  * @adapter: Board private structure
1588  **/
1589 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1590                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1591 static void
1592 e1000_setup_rctl(struct e1000_adapter *adapter)
1593 {
1594         uint32_t rctl, rfctl;
1595         uint32_t psrctl = 0;
1596 #ifdef CONFIG_E1000_PACKET_SPLIT
1597         uint32_t pages = 0;
1598 #endif
1599
1600         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1601
1602         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1603
1604         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1605                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1606                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1607
1608         if (adapter->hw.mac_type > e1000_82543)
1609                 rctl |= E1000_RCTL_SECRC;
1610
1611         if (adapter->hw.tbi_compatibility_on == 1)
1612                 rctl |= E1000_RCTL_SBP;
1613         else
1614                 rctl &= ~E1000_RCTL_SBP;
1615
1616         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1617                 rctl &= ~E1000_RCTL_LPE;
1618         else
1619                 rctl |= E1000_RCTL_LPE;
1620
1621         /* Setup buffer sizes */
1622         if(adapter->hw.mac_type >= e1000_82571) {
1623                 /* We can now specify buffers in 1K increments.
1624                  * BSIZE and BSEX are ignored in this case. */
1625                 rctl |= adapter->rx_buffer_len << 0x11;
1626         } else {
1627                 rctl &= ~E1000_RCTL_SZ_4096;
1628                 rctl |= E1000_RCTL_BSEX;
1629                 switch (adapter->rx_buffer_len) {
1630                 case E1000_RXBUFFER_2048:
1631                 default:
1632                         rctl |= E1000_RCTL_SZ_2048;
1633                         rctl &= ~E1000_RCTL_BSEX;
1634                         break;
1635                 case E1000_RXBUFFER_4096:
1636                         rctl |= E1000_RCTL_SZ_4096;
1637                         break;
1638                 case E1000_RXBUFFER_8192:
1639                         rctl |= E1000_RCTL_SZ_8192;
1640                         break;
1641                 case E1000_RXBUFFER_16384:
1642                         rctl |= E1000_RCTL_SZ_16384;
1643                         break;
1644                 }
1645         }
1646
1647 #ifdef CONFIG_E1000_PACKET_SPLIT
1648         /* 82571 and greater support packet-split where the protocol
1649          * header is placed in skb->data and the packet data is
1650          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1651          * In the case of a non-split, skb->data is linearly filled,
1652          * followed by the page buffers.  Therefore, skb->data is
1653          * sized to hold the largest protocol header.
1654          */
1655         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1656         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1657             PAGE_SIZE <= 16384)
1658                 adapter->rx_ps_pages = pages;
1659         else
1660                 adapter->rx_ps_pages = 0;
1661 #endif
1662         if (adapter->rx_ps_pages) {
1663                 /* Configure extra packet-split registers */
1664                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1665                 rfctl |= E1000_RFCTL_EXTEN;
1666                 /* disable IPv6 packet split support */
1667                 rfctl |= E1000_RFCTL_IPV6_DIS;
1668                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1669
1670                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1671
1672                 psrctl |= adapter->rx_ps_bsize0 >>
1673                         E1000_PSRCTL_BSIZE0_SHIFT;
1674
1675                 switch (adapter->rx_ps_pages) {
1676                 case 3:
1677                         psrctl |= PAGE_SIZE <<
1678                                 E1000_PSRCTL_BSIZE3_SHIFT;
1679                 case 2:
1680                         psrctl |= PAGE_SIZE <<
1681                                 E1000_PSRCTL_BSIZE2_SHIFT;
1682                 case 1:
1683                         psrctl |= PAGE_SIZE >>
1684                                 E1000_PSRCTL_BSIZE1_SHIFT;
1685                         break;
1686                 }
1687
1688                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1689         }
1690
1691         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1692 }
1693
1694 /**
1695  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1696  * @adapter: board private structure
1697  *
1698  * Configure the Rx unit of the MAC after a reset.
1699  **/
1700
1701 static void
1702 e1000_configure_rx(struct e1000_adapter *adapter)
1703 {
1704         uint64_t rdba;
1705         struct e1000_hw *hw = &adapter->hw;
1706         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1707 #ifdef CONFIG_E1000_MQ
1708         uint32_t reta, mrqc;
1709         int i;
1710 #endif
1711
1712         if (adapter->rx_ps_pages) {
1713                 rdlen = adapter->rx_ring[0].count *
1714                         sizeof(union e1000_rx_desc_packet_split);
1715                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1716                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1717         } else {
1718                 rdlen = adapter->rx_ring[0].count *
1719                         sizeof(struct e1000_rx_desc);
1720                 adapter->clean_rx = e1000_clean_rx_irq;
1721                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1722         }
1723
1724         /* disable receives while setting up the descriptors */
1725         rctl = E1000_READ_REG(hw, RCTL);
1726         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1727
1728         /* set the Receive Delay Timer Register */
1729         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1730
1731         if (hw->mac_type >= e1000_82540) {
1732                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1733                 if(adapter->itr > 1)
1734                         E1000_WRITE_REG(hw, ITR,
1735                                 1000000000 / (adapter->itr * 256));
1736         }
1737
1738         if (hw->mac_type >= e1000_82571) {
1739                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1740                 /* Reset delay timers after every interrupt */
1741                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1742 #ifdef CONFIG_E1000_NAPI
1743                 /* Auto-Mask interrupts upon ICR read. */
1744                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1745 #endif
1746                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1747                 E1000_WRITE_REG(hw, IAM, ~0);
1748                 E1000_WRITE_FLUSH(hw);
1749         }
1750
1751         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1752          * the Base and Length of the Rx Descriptor Ring */
1753         switch (adapter->num_rx_queues) {
1754 #ifdef CONFIG_E1000_MQ
1755         case 2:
1756                 rdba = adapter->rx_ring[1].dma;
1757                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1758                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1759                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1760                 E1000_WRITE_REG(hw, RDH1, 0);
1761                 E1000_WRITE_REG(hw, RDT1, 0);
1762                 adapter->rx_ring[1].rdh = E1000_RDH1;
1763                 adapter->rx_ring[1].rdt = E1000_RDT1;
1764                 /* Fall Through */
1765 #endif
1766         case 1:
1767         default:
1768                 rdba = adapter->rx_ring[0].dma;
1769                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1770                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1771                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1772                 E1000_WRITE_REG(hw, RDH, 0);
1773                 E1000_WRITE_REG(hw, RDT, 0);
1774                 adapter->rx_ring[0].rdh = E1000_RDH;
1775                 adapter->rx_ring[0].rdt = E1000_RDT;
1776                 break;
1777         }
1778
1779 #ifdef CONFIG_E1000_MQ
1780         if (adapter->num_rx_queues > 1) {
1781                 uint32_t random[10];
1782
1783                 get_random_bytes(&random[0], 40);
1784
1785                 if (hw->mac_type <= e1000_82572) {
1786                         E1000_WRITE_REG(hw, RSSIR, 0);
1787                         E1000_WRITE_REG(hw, RSSIM, 0);
1788                 }
1789
1790                 switch (adapter->num_rx_queues) {
1791                 case 2:
1792                 default:
1793                         reta = 0x00800080;
1794                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1795                         break;
1796                 }
1797
1798                 /* Fill out redirection table */
1799                 for (i = 0; i < 32; i++)
1800                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1801                 /* Fill out hash function seeds */
1802                 for (i = 0; i < 10; i++)
1803                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1804
1805                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1806                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1807                 E1000_WRITE_REG(hw, MRQC, mrqc);
1808         }
1809
1810         /* Multiqueue and packet checksumming are mutually exclusive. */
1811         if (hw->mac_type >= e1000_82571) {
1812                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1813                 rxcsum |= E1000_RXCSUM_PCSD;
1814                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1815         }
1816
1817 #else
1818
1819         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1820         if (hw->mac_type >= e1000_82543) {
1821                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1822                 if(adapter->rx_csum == TRUE) {
1823                         rxcsum |= E1000_RXCSUM_TUOFL;
1824
1825                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1826                          * Must be used in conjunction with packet-split. */
1827                         if ((hw->mac_type >= e1000_82571) &&
1828                            (adapter->rx_ps_pages)) {
1829                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1830                         }
1831                 } else {
1832                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1833                         /* don't need to clear IPPCSE as it defaults to 0 */
1834                 }
1835                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1836         }
1837 #endif /* CONFIG_E1000_MQ */
1838
1839         if (hw->mac_type == e1000_82573)
1840                 E1000_WRITE_REG(hw, ERT, 0x0100);
1841
1842         /* Enable Receives */
1843         E1000_WRITE_REG(hw, RCTL, rctl);
1844 }
1845
1846 /**
1847  * e1000_free_tx_resources - Free Tx Resources per Queue
1848  * @adapter: board private structure
1849  * @tx_ring: Tx descriptor ring for a specific queue
1850  *
1851  * Free all transmit software resources
1852  **/
1853
1854 static void
1855 e1000_free_tx_resources(struct e1000_adapter *adapter,
1856                         struct e1000_tx_ring *tx_ring)
1857 {
1858         struct pci_dev *pdev = adapter->pdev;
1859
1860         e1000_clean_tx_ring(adapter, tx_ring);
1861
1862         vfree(tx_ring->buffer_info);
1863         tx_ring->buffer_info = NULL;
1864
1865         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1866
1867         tx_ring->desc = NULL;
1868 }
1869
1870 /**
1871  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1872  * @adapter: board private structure
1873  *
1874  * Free all transmit software resources
1875  **/
1876
1877 void
1878 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1879 {
1880         int i;
1881
1882         for (i = 0; i < adapter->num_tx_queues; i++)
1883                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1884 }
1885
1886 static inline void
1887 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1888                         struct e1000_buffer *buffer_info)
1889 {
1890         if(buffer_info->dma) {
1891                 pci_unmap_page(adapter->pdev,
1892                                 buffer_info->dma,
1893                                 buffer_info->length,
1894                                 PCI_DMA_TODEVICE);
1895                 buffer_info->dma = 0;
1896         }
1897         if(buffer_info->skb) {
1898                 dev_kfree_skb_any(buffer_info->skb);
1899                 buffer_info->skb = NULL;
1900         }
1901 }
1902
1903 /**
1904  * e1000_clean_tx_ring - Free Tx Buffers
1905  * @adapter: board private structure
1906  * @tx_ring: ring to be cleaned
1907  **/
1908
1909 static void
1910 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1911                     struct e1000_tx_ring *tx_ring)
1912 {
1913         struct e1000_buffer *buffer_info;
1914         unsigned long size;
1915         unsigned int i;
1916
1917         /* Free all the Tx ring sk_buffs */
1918
1919         for(i = 0; i < tx_ring->count; i++) {
1920                 buffer_info = &tx_ring->buffer_info[i];
1921                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1922         }
1923
1924         size = sizeof(struct e1000_buffer) * tx_ring->count;
1925         memset(tx_ring->buffer_info, 0, size);
1926
1927         /* Zero out the descriptor ring */
1928
1929         memset(tx_ring->desc, 0, tx_ring->size);
1930
1931         tx_ring->next_to_use = 0;
1932         tx_ring->next_to_clean = 0;
1933         tx_ring->last_tx_tso = 0;
1934
1935         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1936         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1937 }
1938
1939 /**
1940  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1941  * @adapter: board private structure
1942  **/
1943
1944 static void
1945 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1946 {
1947         int i;
1948
1949         for (i = 0; i < adapter->num_tx_queues; i++)
1950                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1951 }
1952
1953 /**
1954  * e1000_free_rx_resources - Free Rx Resources
1955  * @adapter: board private structure
1956  * @rx_ring: ring to clean the resources from
1957  *
1958  * Free all receive software resources
1959  **/
1960
1961 static void
1962 e1000_free_rx_resources(struct e1000_adapter *adapter,
1963                         struct e1000_rx_ring *rx_ring)
1964 {
1965         struct pci_dev *pdev = adapter->pdev;
1966
1967         e1000_clean_rx_ring(adapter, rx_ring);
1968
1969         vfree(rx_ring->buffer_info);
1970         rx_ring->buffer_info = NULL;
1971         kfree(rx_ring->ps_page);
1972         rx_ring->ps_page = NULL;
1973         kfree(rx_ring->ps_page_dma);
1974         rx_ring->ps_page_dma = NULL;
1975
1976         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1977
1978         rx_ring->desc = NULL;
1979 }
1980
1981 /**
1982  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1983  * @adapter: board private structure
1984  *
1985  * Free all receive software resources
1986  **/
1987
1988 void
1989 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1990 {
1991         int i;
1992
1993         for (i = 0; i < adapter->num_rx_queues; i++)
1994                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1995 }
1996
1997 /**
1998  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1999  * @adapter: board private structure
2000  * @rx_ring: ring to free buffers from
2001  **/
2002
2003 static void
2004 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2005                     struct e1000_rx_ring *rx_ring)
2006 {
2007         struct e1000_buffer *buffer_info;
2008         struct e1000_ps_page *ps_page;
2009         struct e1000_ps_page_dma *ps_page_dma;
2010         struct pci_dev *pdev = adapter->pdev;
2011         unsigned long size;
2012         unsigned int i, j;
2013
2014         /* Free all the Rx ring sk_buffs */
2015
2016         for(i = 0; i < rx_ring->count; i++) {
2017                 buffer_info = &rx_ring->buffer_info[i];
2018                 if(buffer_info->skb) {
2019                         ps_page = &rx_ring->ps_page[i];
2020                         ps_page_dma = &rx_ring->ps_page_dma[i];
2021                         pci_unmap_single(pdev,
2022                                          buffer_info->dma,
2023                                          buffer_info->length,
2024                                          PCI_DMA_FROMDEVICE);
2025
2026                         dev_kfree_skb(buffer_info->skb);
2027                         buffer_info->skb = NULL;
2028                 }
2029                 ps_page = &rx_ring->ps_page[i];
2030                 ps_page_dma = &rx_ring->ps_page_dma[i];
2031                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2032                         if (!ps_page->ps_page[j]) break;
2033                         pci_unmap_page(pdev,
2034                                        ps_page_dma->ps_page_dma[j],
2035                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2036                         ps_page_dma->ps_page_dma[j] = 0;
2037                         put_page(ps_page->ps_page[j]);
2038                         ps_page->ps_page[j] = NULL;
2039                 }
2040         }
2041
2042         /* there also may be some cached data in our adapter */
2043         if (rx_ring->rx_skb_top) {
2044                 dev_kfree_skb(rx_ring->rx_skb_top);
2045
2046                 /* rx_skb_prev will be wiped out by rx_skb_top */
2047                 rx_ring->rx_skb_top = NULL;
2048                 rx_ring->rx_skb_prev = NULL;
2049         }
2050
2051
2052         size = sizeof(struct e1000_buffer) * rx_ring->count;
2053         memset(rx_ring->buffer_info, 0, size);
2054         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2055         memset(rx_ring->ps_page, 0, size);
2056         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2057         memset(rx_ring->ps_page_dma, 0, size);
2058
2059         /* Zero out the descriptor ring */
2060
2061         memset(rx_ring->desc, 0, rx_ring->size);
2062
2063         rx_ring->next_to_clean = 0;
2064         rx_ring->next_to_use = 0;
2065
2066         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2067         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2068 }
2069
2070 /**
2071  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2072  * @adapter: board private structure
2073  **/
2074
2075 static void
2076 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2077 {
2078         int i;
2079
2080         for (i = 0; i < adapter->num_rx_queues; i++)
2081                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2082 }
2083
2084 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2085  * and memory write and invalidate disabled for certain operations
2086  */
2087 static void
2088 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2089 {
2090         struct net_device *netdev = adapter->netdev;
2091         uint32_t rctl;
2092
2093         e1000_pci_clear_mwi(&adapter->hw);
2094
2095         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2096         rctl |= E1000_RCTL_RST;
2097         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2098         E1000_WRITE_FLUSH(&adapter->hw);
2099         mdelay(5);
2100
2101         if(netif_running(netdev))
2102                 e1000_clean_all_rx_rings(adapter);
2103 }
2104
2105 static void
2106 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2107 {
2108         struct net_device *netdev = adapter->netdev;
2109         uint32_t rctl;
2110
2111         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2112         rctl &= ~E1000_RCTL_RST;
2113         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2114         E1000_WRITE_FLUSH(&adapter->hw);
2115         mdelay(5);
2116
2117         if(adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2118                 e1000_pci_set_mwi(&adapter->hw);
2119
2120         if(netif_running(netdev)) {
2121                 e1000_configure_rx(adapter);
2122                 e1000_alloc_rx_buffers(adapter, &adapter->rx_ring[0]);
2123         }
2124 }
2125
2126 /**
2127  * e1000_set_mac - Change the Ethernet Address of the NIC
2128  * @netdev: network interface device structure
2129  * @p: pointer to an address structure
2130  *
2131  * Returns 0 on success, negative on failure
2132  **/
2133
2134 static int
2135 e1000_set_mac(struct net_device *netdev, void *p)
2136 {
2137         struct e1000_adapter *adapter = netdev_priv(netdev);
2138         struct sockaddr *addr = p;
2139
2140         if(!is_valid_ether_addr(addr->sa_data))
2141                 return -EADDRNOTAVAIL;
2142
2143         /* 82542 2.0 needs to be in reset to write receive address registers */
2144
2145         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2146                 e1000_enter_82542_rst(adapter);
2147
2148         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2149         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2150
2151         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2152
2153         /* With 82571 controllers, LAA may be overwritten (with the default)
2154          * due to controller reset from the other port. */
2155         if (adapter->hw.mac_type == e1000_82571) {
2156                 /* activate the work around */
2157                 adapter->hw.laa_is_present = 1;
2158
2159                 /* Hold a copy of the LAA in RAR[14] This is done so that
2160                  * between the time RAR[0] gets clobbered  and the time it
2161                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2162                  * of the RARs and no incoming packets directed to this port
2163                  * are dropped. Eventaully the LAA will be in RAR[0] and
2164                  * RAR[14] */
2165                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2166                                         E1000_RAR_ENTRIES - 1);
2167         }
2168
2169         if(adapter->hw.mac_type == e1000_82542_rev2_0)
2170                 e1000_leave_82542_rst(adapter);
2171
2172         return 0;
2173 }
2174
2175 /**
2176  * e1000_set_multi - Multicast and Promiscuous mode set
2177  * @netdev: network interface device structure
2178  *
2179  * The set_multi entry point is called whenever the multicast address
2180  * list or the network interface flags are updated.  This routine is
2181  * responsible for configuring the hardware for proper multicast,
2182  * promiscuous mode, and all-multi behavior.
2183  **/
2184
2185 static void
2186 e1000_set_multi(struct net_device *netdev)
2187 {
2188         struct e1000_adapter *adapter = netdev_priv(netdev);
2189         struct e1000_hw *hw = &adapter->hw;
2190         struct dev_mc_list *mc_ptr;
2191         uint32_t rctl;
2192         uint32_t hash_value;
2193         int i, rar_entries = E1000_RAR_ENTRIES;
2194
2195         /* reserve RAR[14] for LAA over-write work-around */
2196         if (adapter->hw.mac_type == e1000_82571)
2197                 rar_entries--;
2198
2199         /* Check for Promiscuous and All Multicast modes */
2200
2201         rctl = E1000_READ_REG(hw, RCTL);
2202
2203         if(netdev->flags & IFF_PROMISC) {
2204                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2205         } else if(netdev->flags & IFF_ALLMULTI) {
2206                 rctl |= E1000_RCTL_MPE;
2207                 rctl &= ~E1000_RCTL_UPE;
2208         } else {
2209                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2210         }
2211
2212         E1000_WRITE_REG(hw, RCTL, rctl);
2213
2214         /* 82542 2.0 needs to be in reset to write receive address registers */
2215
2216         if(hw->mac_type == e1000_82542_rev2_0)
2217                 e1000_enter_82542_rst(adapter);
2218
2219         /* load the first 14 multicast address into the exact filters 1-14
2220          * RAR 0 is used for the station MAC adddress
2221          * if there are not 14 addresses, go ahead and clear the filters
2222          * -- with 82571 controllers only 0-13 entries are filled here
2223          */
2224         mc_ptr = netdev->mc_list;
2225
2226         for(i = 1; i < rar_entries; i++) {
2227                 if (mc_ptr) {
2228                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2229                         mc_ptr = mc_ptr->next;
2230                 } else {
2231                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2232                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2233                 }
2234         }
2235
2236         /* clear the old settings from the multicast hash table */
2237
2238         for(i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2239                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2240
2241         /* load any remaining addresses into the hash table */
2242
2243         for(; mc_ptr; mc_ptr = mc_ptr->next) {
2244                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2245                 e1000_mta_set(hw, hash_value);
2246         }
2247
2248         if(hw->mac_type == e1000_82542_rev2_0)
2249                 e1000_leave_82542_rst(adapter);
2250 }
2251
2252 /* Need to wait a few seconds after link up to get diagnostic information from
2253  * the phy */
2254
2255 static void
2256 e1000_update_phy_info(unsigned long data)
2257 {
2258         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2259         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2260 }
2261
2262 /**
2263  * e1000_82547_tx_fifo_stall - Timer Call-back
2264  * @data: pointer to adapter cast into an unsigned long
2265  **/
2266
2267 static void
2268 e1000_82547_tx_fifo_stall(unsigned long data)
2269 {
2270         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2271         struct net_device *netdev = adapter->netdev;
2272         uint32_t tctl;
2273
2274         if(atomic_read(&adapter->tx_fifo_stall)) {
2275                 if((E1000_READ_REG(&adapter->hw, TDT) ==
2276                     E1000_READ_REG(&adapter->hw, TDH)) &&
2277                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2278                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2279                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2280                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2281                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2282                         E1000_WRITE_REG(&adapter->hw, TCTL,
2283                                         tctl & ~E1000_TCTL_EN);
2284                         E1000_WRITE_REG(&adapter->hw, TDFT,
2285                                         adapter->tx_head_addr);
2286                         E1000_WRITE_REG(&adapter->hw, TDFH,
2287                                         adapter->tx_head_addr);
2288                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2289                                         adapter->tx_head_addr);
2290                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2291                                         adapter->tx_head_addr);
2292                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2293                         E1000_WRITE_FLUSH(&adapter->hw);
2294
2295                         adapter->tx_fifo_head = 0;
2296                         atomic_set(&adapter->tx_fifo_stall, 0);
2297                         netif_wake_queue(netdev);
2298                 } else {
2299                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2300                 }
2301         }
2302 }
2303
2304 /**
2305  * e1000_watchdog - Timer Call-back
2306  * @data: pointer to adapter cast into an unsigned long
2307  **/
2308 static void
2309 e1000_watchdog(unsigned long data)
2310 {
2311         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2312
2313         /* Do the rest outside of interrupt context */
2314         schedule_work(&adapter->watchdog_task);
2315 }
2316
2317 static void
2318 e1000_watchdog_task(struct e1000_adapter *adapter)
2319 {
2320         struct net_device *netdev = adapter->netdev;
2321         struct e1000_tx_ring *txdr = adapter->tx_ring;
2322         uint32_t link;
2323
2324         e1000_check_for_link(&adapter->hw);
2325         if (adapter->hw.mac_type == e1000_82573) {
2326                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2327                 if(adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2328                         e1000_update_mng_vlan(adapter);
2329         }
2330
2331         if((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2332            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2333                 link = !adapter->hw.serdes_link_down;
2334         else
2335                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2336
2337         if(link) {
2338                 if(!netif_carrier_ok(netdev)) {
2339                         e1000_get_speed_and_duplex(&adapter->hw,
2340                                                    &adapter->link_speed,
2341                                                    &adapter->link_duplex);
2342
2343                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2344                                adapter->link_speed,
2345                                adapter->link_duplex == FULL_DUPLEX ?
2346                                "Full Duplex" : "Half Duplex");
2347
2348                         /* tweak tx_queue_len according to speed/duplex */
2349                         netdev->tx_queue_len = adapter->tx_queue_len;
2350                         adapter->tx_timeout_factor = 1;
2351                         if (adapter->link_duplex == HALF_DUPLEX) {
2352                                 switch (adapter->link_speed) {
2353                                 case SPEED_10:
2354                                         netdev->tx_queue_len = 10;
2355                                         adapter->tx_timeout_factor = 8;
2356                                         break;
2357                                 case SPEED_100:
2358                                         netdev->tx_queue_len = 100;
2359                                         break;
2360                                 }
2361                         }
2362
2363                         netif_carrier_on(netdev);
2364                         netif_wake_queue(netdev);
2365                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2366                         adapter->smartspeed = 0;
2367                 }
2368         } else {
2369                 if(netif_carrier_ok(netdev)) {
2370                         adapter->link_speed = 0;
2371                         adapter->link_duplex = 0;
2372                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2373                         netif_carrier_off(netdev);
2374                         netif_stop_queue(netdev);
2375                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2376                 }
2377
2378                 e1000_smartspeed(adapter);
2379         }
2380
2381         e1000_update_stats(adapter);
2382
2383         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2384         adapter->tpt_old = adapter->stats.tpt;
2385         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2386         adapter->colc_old = adapter->stats.colc;
2387
2388         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2389         adapter->gorcl_old = adapter->stats.gorcl;
2390         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2391         adapter->gotcl_old = adapter->stats.gotcl;
2392
2393         e1000_update_adaptive(&adapter->hw);
2394
2395 #ifdef CONFIG_E1000_MQ
2396         txdr = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2397 #endif
2398         if (!netif_carrier_ok(netdev)) {
2399                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2400                         /* We've lost link, so the controller stops DMA,
2401                          * but we've got queued Tx work that's never going
2402                          * to get done, so reset controller to flush Tx.
2403                          * (Do the reset outside of interrupt context). */
2404                         schedule_work(&adapter->tx_timeout_task);
2405                 }
2406         }
2407
2408         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2409         if(adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2410                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2411                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2412                  * else is between 2000-8000. */
2413                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2414                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2415                         adapter->gotcl - adapter->gorcl :
2416                         adapter->gorcl - adapter->gotcl) / 10000;
2417                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2418                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2419         }
2420
2421         /* Cause software interrupt to ensure rx ring is cleaned */
2422         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2423
2424         /* Force detection of hung controller every watchdog period */
2425         adapter->detect_tx_hung = TRUE;
2426
2427         /* With 82571 controllers, LAA may be overwritten due to controller
2428          * reset from the other port. Set the appropriate LAA in RAR[0] */
2429         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2430                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2431
2432         /* Reset the timer */
2433         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2434 }
2435
2436 #define E1000_TX_FLAGS_CSUM             0x00000001
2437 #define E1000_TX_FLAGS_VLAN             0x00000002
2438 #define E1000_TX_FLAGS_TSO              0x00000004
2439 #define E1000_TX_FLAGS_IPV4             0x00000008
2440 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2441 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2442
2443 static inline int
2444 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2445           struct sk_buff *skb)
2446 {
2447 #ifdef NETIF_F_TSO
2448         struct e1000_context_desc *context_desc;
2449         struct e1000_buffer *buffer_info;
2450         unsigned int i;
2451         uint32_t cmd_length = 0;
2452         uint16_t ipcse = 0, tucse, mss;
2453         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2454         int err;
2455
2456         if(skb_shinfo(skb)->tso_size) {
2457                 if (skb_header_cloned(skb)) {
2458                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2459                         if (err)
2460                                 return err;
2461                 }
2462
2463                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2464                 mss = skb_shinfo(skb)->tso_size;
2465                 if(skb->protocol == ntohs(ETH_P_IP)) {
2466                         skb->nh.iph->tot_len = 0;
2467                         skb->nh.iph->check = 0;
2468                         skb->h.th->check =
2469                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2470                                                    skb->nh.iph->daddr,
2471                                                    0,
2472                                                    IPPROTO_TCP,
2473                                                    0);
2474                         cmd_length = E1000_TXD_CMD_IP;
2475                         ipcse = skb->h.raw - skb->data - 1;
2476 #ifdef NETIF_F_TSO_IPV6
2477                 } else if(skb->protocol == ntohs(ETH_P_IPV6)) {
2478                         skb->nh.ipv6h->payload_len = 0;
2479                         skb->h.th->check =
2480                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2481                                                  &skb->nh.ipv6h->daddr,
2482                                                  0,
2483                                                  IPPROTO_TCP,
2484                                                  0);
2485                         ipcse = 0;
2486 #endif
2487                 }
2488                 ipcss = skb->nh.raw - skb->data;
2489                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2490                 tucss = skb->h.raw - skb->data;
2491                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2492                 tucse = 0;
2493
2494                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2495                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2496
2497                 i = tx_ring->next_to_use;
2498                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2499                 buffer_info = &tx_ring->buffer_info[i];
2500
2501                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2502                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2503                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2504                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2505                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2506                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2507                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2508                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2509                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2510
2511                 buffer_info->time_stamp = jiffies;
2512
2513                 if (++i == tx_ring->count) i = 0;
2514                 tx_ring->next_to_use = i;
2515
2516                 return 1;
2517         }
2518 #endif
2519
2520         return 0;
2521 }
2522
2523 static inline boolean_t
2524 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2525               struct sk_buff *skb)
2526 {
2527         struct e1000_context_desc *context_desc;
2528         struct e1000_buffer *buffer_info;
2529         unsigned int i;
2530         uint8_t css;
2531
2532         if(likely(skb->ip_summed == CHECKSUM_HW)) {
2533                 css = skb->h.raw - skb->data;
2534
2535                 i = tx_ring->next_to_use;
2536                 buffer_info = &tx_ring->buffer_info[i];
2537                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2538
2539                 context_desc->upper_setup.tcp_fields.tucss = css;
2540                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2541                 context_desc->upper_setup.tcp_fields.tucse = 0;
2542                 context_desc->tcp_seg_setup.data = 0;
2543                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2544
2545                 buffer_info->time_stamp = jiffies;
2546
2547                 if (unlikely(++i == tx_ring->count)) i = 0;
2548                 tx_ring->next_to_use = i;
2549
2550                 return TRUE;
2551         }
2552
2553         return FALSE;
2554 }
2555
2556 #define E1000_MAX_TXD_PWR       12
2557 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2558
2559 static inline int
2560 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2561              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2562              unsigned int nr_frags, unsigned int mss)
2563 {
2564         struct e1000_buffer *buffer_info;
2565         unsigned int len = skb->len;
2566         unsigned int offset = 0, size, count = 0, i;
2567         unsigned int f;
2568         len -= skb->data_len;
2569
2570         i = tx_ring->next_to_use;
2571
2572         while(len) {
2573                 buffer_info = &tx_ring->buffer_info[i];
2574                 size = min(len, max_per_txd);
2575 #ifdef NETIF_F_TSO
2576                 /* Workaround for Controller erratum --
2577                  * descriptor for non-tso packet in a linear SKB that follows a
2578                  * tso gets written back prematurely before the data is fully
2579                  * DMAd to the controller */
2580                 if (!skb->data_len && tx_ring->last_tx_tso &&
2581                                 !skb_shinfo(skb)->tso_size) {
2582                         tx_ring->last_tx_tso = 0;
2583                         size -= 4;
2584                 }
2585
2586                 /* Workaround for premature desc write-backs
2587                  * in TSO mode.  Append 4-byte sentinel desc */
2588                 if(unlikely(mss && !nr_frags && size == len && size > 8))
2589                         size -= 4;
2590 #endif
2591                 /* work-around for errata 10 and it applies
2592                  * to all controllers in PCI-X mode
2593                  * The fix is to make sure that the first descriptor of a
2594                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2595                  */
2596                 if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2597                                 (size > 2015) && count == 0))
2598                         size = 2015;
2599
2600                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2601                  * terminating buffers within evenly-aligned dwords. */
2602                 if(unlikely(adapter->pcix_82544 &&
2603                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2604                    size > 4))
2605                         size -= 4;
2606
2607                 buffer_info->length = size;
2608                 buffer_info->dma =
2609                         pci_map_single(adapter->pdev,
2610                                 skb->data + offset,
2611                                 size,
2612                                 PCI_DMA_TODEVICE);
2613                 buffer_info->time_stamp = jiffies;
2614
2615                 len -= size;
2616                 offset += size;
2617                 count++;
2618                 if(unlikely(++i == tx_ring->count)) i = 0;
2619         }
2620
2621         for(f = 0; f < nr_frags; f++) {
2622                 struct skb_frag_struct *frag;
2623
2624                 frag = &skb_shinfo(skb)->frags[f];
2625                 len = frag->size;
2626                 offset = frag->page_offset;
2627
2628                 while(len) {
2629                         buffer_info = &tx_ring->buffer_info[i];
2630                         size = min(len, max_per_txd);
2631 #ifdef NETIF_F_TSO
2632                         /* Workaround for premature desc write-backs
2633                          * in TSO mode.  Append 4-byte sentinel desc */
2634                         if(unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2635                                 size -= 4;
2636 #endif
2637                         /* Workaround for potential 82544 hang in PCI-X.
2638                          * Avoid terminating buffers within evenly-aligned
2639                          * dwords. */
2640                         if(unlikely(adapter->pcix_82544 &&
2641                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2642                            size > 4))
2643                                 size -= 4;
2644
2645                         buffer_info->length = size;
2646                         buffer_info->dma =
2647                                 pci_map_page(adapter->pdev,
2648                                         frag->page,
2649                                         offset,
2650                                         size,
2651                                         PCI_DMA_TODEVICE);
2652                         buffer_info->time_stamp = jiffies;
2653
2654                         len -= size;
2655                         offset += size;
2656                         count++;
2657                         if(unlikely(++i == tx_ring->count)) i = 0;
2658                 }
2659         }
2660
2661         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2662         tx_ring->buffer_info[i].skb = skb;
2663         tx_ring->buffer_info[first].next_to_watch = i;
2664
2665         return count;
2666 }
2667
2668 static inline void
2669 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2670                int tx_flags, int count)
2671 {
2672         struct e1000_tx_desc *tx_desc = NULL;
2673         struct e1000_buffer *buffer_info;
2674         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2675         unsigned int i;
2676
2677         if(likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2678                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2679                              E1000_TXD_CMD_TSE;
2680                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2681
2682                 if(likely(tx_flags & E1000_TX_FLAGS_IPV4))
2683                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2684         }
2685
2686         if(likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2687                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2688                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2689         }
2690
2691         if(unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2692                 txd_lower |= E1000_TXD_CMD_VLE;
2693                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2694         }
2695
2696         i = tx_ring->next_to_use;
2697
2698         while(count--) {
2699                 buffer_info = &tx_ring->buffer_info[i];
2700                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2701                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2702                 tx_desc->lower.data =
2703                         cpu_to_le32(txd_lower | buffer_info->length);
2704                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2705                 if(unlikely(++i == tx_ring->count)) i = 0;
2706         }
2707
2708         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2709
2710         /* Force memory writes to complete before letting h/w
2711          * know there are new descriptors to fetch.  (Only
2712          * applicable for weak-ordered memory model archs,
2713          * such as IA-64). */
2714         wmb();
2715
2716         tx_ring->next_to_use = i;
2717         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2718 }
2719
2720 /**
2721  * 82547 workaround to avoid controller hang in half-duplex environment.
2722  * The workaround is to avoid queuing a large packet that would span
2723  * the internal Tx FIFO ring boundary by notifying the stack to resend
2724  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2725  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2726  * to the beginning of the Tx FIFO.
2727  **/
2728
2729 #define E1000_FIFO_HDR                  0x10
2730 #define E1000_82547_PAD_LEN             0x3E0
2731
2732 static inline int
2733 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2734 {
2735         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2736         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2737
2738         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2739
2740         if(adapter->link_duplex != HALF_DUPLEX)
2741                 goto no_fifo_stall_required;
2742
2743         if(atomic_read(&adapter->tx_fifo_stall))
2744                 return 1;
2745
2746         if(skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2747                 atomic_set(&adapter->tx_fifo_stall, 1);
2748                 return 1;
2749         }
2750
2751 no_fifo_stall_required:
2752         adapter->tx_fifo_head += skb_fifo_len;
2753         if(adapter->tx_fifo_head >= adapter->tx_fifo_size)
2754                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2755         return 0;
2756 }
2757
2758 #define MINIMUM_DHCP_PACKET_SIZE 282
2759 static inline int
2760 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2761 {
2762         struct e1000_hw *hw =  &adapter->hw;
2763         uint16_t length, offset;
2764         if(vlan_tx_tag_present(skb)) {
2765                 if(!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2766                         ( adapter->hw.mng_cookie.status &
2767                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2768                         return 0;
2769         }
2770         if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2771                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2772                 if((htons(ETH_P_IP) == eth->h_proto)) {
2773                         const struct iphdr *ip =
2774                                 (struct iphdr *)((uint8_t *)skb->data+14);
2775                         if(IPPROTO_UDP == ip->protocol) {
2776                                 struct udphdr *udp =
2777                                         (struct udphdr *)((uint8_t *)ip +
2778                                                 (ip->ihl << 2));
2779                                 if(ntohs(udp->dest) == 67) {
2780                                         offset = (uint8_t *)udp + 8 - skb->data;
2781                                         length = skb->len - offset;
2782
2783                                         return e1000_mng_write_dhcp_info(hw,
2784                                                         (uint8_t *)udp + 8,
2785                                                         length);
2786                                 }
2787                         }
2788                 }
2789         }
2790         return 0;
2791 }
2792
2793 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2794 static int
2795 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2796 {
2797         struct e1000_adapter *adapter = netdev_priv(netdev);
2798         struct e1000_tx_ring *tx_ring;
2799         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2800         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2801         unsigned int tx_flags = 0;
2802         unsigned int len = skb->len;
2803         unsigned long flags;
2804         unsigned int nr_frags = 0;
2805         unsigned int mss = 0;
2806         int count = 0;
2807         int tso;
2808         unsigned int f;
2809         len -= skb->data_len;
2810
2811 #ifdef CONFIG_E1000_MQ
2812         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2813 #else
2814         tx_ring = adapter->tx_ring;
2815 #endif
2816
2817         if (unlikely(skb->len <= 0)) {
2818                 dev_kfree_skb_any(skb);
2819                 return NETDEV_TX_OK;
2820         }
2821
2822 #ifdef NETIF_F_TSO
2823         mss = skb_shinfo(skb)->tso_size;
2824         /* The controller does a simple calculation to
2825          * make sure there is enough room in the FIFO before
2826          * initiating the DMA for each buffer.  The calc is:
2827          * 4 = ceil(buffer len/mss).  To make sure we don't
2828          * overrun the FIFO, adjust the max buffer len if mss
2829          * drops. */
2830         if(mss) {
2831                 uint8_t hdr_len;
2832                 max_per_txd = min(mss << 2, max_per_txd);
2833                 max_txd_pwr = fls(max_per_txd) - 1;
2834
2835         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2836          * points to just header, pull a few bytes of payload from
2837          * frags into skb->data */
2838                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2839                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2840                         (adapter->hw.mac_type == e1000_82571 ||
2841                         adapter->hw.mac_type == e1000_82572)) {
2842                         unsigned int pull_size;
2843                         pull_size = min((unsigned int)4, skb->data_len);
2844                         if (!__pskb_pull_tail(skb, pull_size)) {
2845                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2846                                 dev_kfree_skb_any(skb);
2847                                 return -EFAULT;
2848                         }
2849                         len = skb->len - skb->data_len;
2850                 }
2851         }
2852
2853         if((mss) || (skb->ip_summed == CHECKSUM_HW))
2854         /* reserve a descriptor for the offload context */
2855                 count++;
2856         count++;
2857 #else
2858         if(skb->ip_summed == CHECKSUM_HW)
2859                 count++;
2860 #endif
2861
2862 #ifdef NETIF_F_TSO
2863         /* Controller Erratum workaround */
2864         if (!skb->data_len && tx_ring->last_tx_tso &&
2865                 !skb_shinfo(skb)->tso_size)
2866                 count++;
2867 #endif
2868
2869         count += TXD_USE_COUNT(len, max_txd_pwr);
2870
2871         if(adapter->pcix_82544)
2872                 count++;
2873
2874         /* work-around for errata 10 and it applies to all controllers
2875          * in PCI-X mode, so add one more descriptor to the count
2876          */
2877         if(unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2878                         (len > 2015)))
2879                 count++;
2880
2881         nr_frags = skb_shinfo(skb)->nr_frags;
2882         for(f = 0; f < nr_frags; f++)
2883                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2884                                        max_txd_pwr);
2885         if(adapter->pcix_82544)
2886                 count += nr_frags;
2887
2888         if(adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2889                 e1000_transfer_dhcp_info(adapter, skb);
2890
2891         local_irq_save(flags);
2892         if (!spin_trylock(&tx_ring->tx_lock)) {
2893                 /* Collision - tell upper layer to requeue */
2894                 local_irq_restore(flags);
2895                 return NETDEV_TX_LOCKED;
2896         }
2897
2898         /* need: count + 2 desc gap to keep tail from touching
2899          * head, otherwise try next time */
2900         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2901                 netif_stop_queue(netdev);
2902                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2903                 return NETDEV_TX_BUSY;
2904         }
2905
2906         if(unlikely(adapter->hw.mac_type == e1000_82547)) {
2907                 if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2908                         netif_stop_queue(netdev);
2909                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2910                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2911                         return NETDEV_TX_BUSY;
2912                 }
2913         }
2914
2915         if(unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2916                 tx_flags |= E1000_TX_FLAGS_VLAN;
2917                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2918         }
2919
2920         first = tx_ring->next_to_use;
2921
2922         tso = e1000_tso(adapter, tx_ring, skb);
2923         if (tso < 0) {
2924                 dev_kfree_skb_any(skb);
2925                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2926                 return NETDEV_TX_OK;
2927         }
2928
2929         if (likely(tso)) {
2930                 tx_ring->last_tx_tso = 1;
2931                 tx_flags |= E1000_TX_FLAGS_TSO;
2932         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2933                 tx_flags |= E1000_TX_FLAGS_CSUM;
2934
2935         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2936          * 82571 hardware supports TSO capabilities for IPv6 as well...
2937          * no longer assume, we must. */
2938         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2939                 tx_flags |= E1000_TX_FLAGS_IPV4;
2940
2941         e1000_tx_queue(adapter, tx_ring, tx_flags,
2942                        e1000_tx_map(adapter, tx_ring, skb, first,
2943                                     max_per_txd, nr_frags, mss));
2944
2945         netdev->trans_start = jiffies;
2946
2947         /* Make sure there is space in the ring for the next send. */
2948         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2949                 netif_stop_queue(netdev);
2950
2951         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2952         return NETDEV_TX_OK;
2953 }
2954
2955 /**
2956  * e1000_tx_timeout - Respond to a Tx Hang
2957  * @netdev: network interface device structure
2958  **/
2959
2960 static void
2961 e1000_tx_timeout(struct net_device *netdev)
2962 {
2963         struct e1000_adapter *adapter = netdev_priv(netdev);
2964
2965         /* Do the reset outside of interrupt context */
2966         schedule_work(&adapter->tx_timeout_task);
2967 }
2968
2969 static void
2970 e1000_tx_timeout_task(struct net_device *netdev)
2971 {
2972         struct e1000_adapter *adapter = netdev_priv(netdev);
2973
2974         adapter->tx_timeout_count++;
2975         e1000_down(adapter);
2976         e1000_up(adapter);
2977 }
2978
2979 /**
2980  * e1000_get_stats - Get System Network Statistics
2981  * @netdev: network interface device structure
2982  *
2983  * Returns the address of the device statistics structure.
2984  * The statistics are actually updated from the timer callback.
2985  **/
2986
2987 static struct net_device_stats *
2988 e1000_get_stats(struct net_device *netdev)
2989 {
2990         struct e1000_adapter *adapter = netdev_priv(netdev);
2991
2992         /* only return the current stats */
2993         return &adapter->net_stats;
2994 }
2995
2996 /**
2997  * e1000_change_mtu - Change the Maximum Transfer Unit
2998  * @netdev: network interface device structure
2999  * @new_mtu: new value for maximum frame size
3000  *
3001  * Returns 0 on success, negative on failure
3002  **/
3003
3004 static int
3005 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3006 {
3007         struct e1000_adapter *adapter = netdev_priv(netdev);
3008         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3009
3010         if((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3011                 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3012                         DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3013                 return -EINVAL;
3014         }
3015
3016         /* Adapter-specific max frame size limits. */
3017         switch (adapter->hw.mac_type) {
3018         case e1000_82542_rev2_0:
3019         case e1000_82542_rev2_1:
3020         case e1000_82573:
3021                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3022                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3023                         return -EINVAL;
3024                 }
3025                 break;
3026         case e1000_82571:
3027         case e1000_82572:
3028 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3029                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3030                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3031                         return -EINVAL;
3032                 }
3033                 break;
3034         default:
3035                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3036                 break;
3037         }
3038
3039         /* since the driver code now supports splitting a packet across
3040          * multiple descriptors, most of the fifo related limitations on
3041          * jumbo frame traffic have gone away.
3042          * simply use 2k descriptors for everything.
3043          *
3044          * NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3045          * means we reserve 2 more, this pushes us to allocate from the next
3046          * larger slab size
3047          * i.e. RXBUFFER_2048 --> size-4096 slab */
3048
3049         /* recent hardware supports 1KB granularity */
3050         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3051                 adapter->rx_buffer_len =
3052                     ((max_frame < E1000_RXBUFFER_2048) ?
3053                         max_frame : E1000_RXBUFFER_2048);
3054                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3055         } else
3056                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3057
3058         netdev->mtu = new_mtu;
3059
3060         if(netif_running(netdev)) {
3061                 e1000_down(adapter);
3062                 e1000_up(adapter);
3063         }
3064
3065         adapter->hw.max_frame_size = max_frame;
3066
3067         return 0;
3068 }
3069
3070 /**
3071  * e1000_update_stats - Update the board statistics counters
3072  * @adapter: board private structure
3073  **/
3074
3075 void
3076 e1000_update_stats(struct e1000_adapter *adapter)
3077 {
3078         struct e1000_hw *hw = &adapter->hw;
3079         unsigned long flags;
3080         uint16_t phy_tmp;
3081
3082 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3083
3084         spin_lock_irqsave(&adapter->stats_lock, flags);
3085
3086         /* these counters are modified from e1000_adjust_tbi_stats,
3087          * called from the interrupt context, so they must only
3088          * be written while holding adapter->stats_lock
3089          */
3090
3091         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3092         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3093         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3094         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3095         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3096         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3097         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3098         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3099         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3100         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3101         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3102         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3103         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3104
3105         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3106         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3107         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3108         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3109         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3110         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3111         adapter->stats.dc += E1000_READ_REG(hw, DC);
3112         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3113         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3114         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3115         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3116         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3117         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3118         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3119         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3120         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3121         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3122         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3123         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3124         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3125         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3126         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3127         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3128         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3129         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3130         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3131         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3132         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3133         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3134         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3135         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3136         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3137         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3138         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3139
3140         /* used for adaptive IFS */
3141
3142         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3143         adapter->stats.tpt += hw->tx_packet_delta;
3144         hw->collision_delta = E1000_READ_REG(hw, COLC);
3145         adapter->stats.colc += hw->collision_delta;
3146
3147         if(hw->mac_type >= e1000_82543) {
3148                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3149                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3150                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3151                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3152                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3153                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3154         }
3155         if(hw->mac_type > e1000_82547_rev_2) {
3156                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3157                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3158                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3159                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3160                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3161                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3162                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3163                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3164                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3165         }
3166
3167         /* Fill out the OS statistics structure */
3168
3169         adapter->net_stats.rx_packets = adapter->stats.gprc;
3170         adapter->net_stats.tx_packets = adapter->stats.gptc;
3171         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3172         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3173         adapter->net_stats.multicast = adapter->stats.mprc;
3174         adapter->net_stats.collisions = adapter->stats.colc;
3175
3176         /* Rx Errors */
3177
3178         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3179                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3180                 adapter->stats.rlec + adapter->stats.cexterr;
3181         adapter->net_stats.rx_dropped = 0;
3182         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3183         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3184         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3185         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3186
3187         /* Tx Errors */
3188
3189         adapter->net_stats.tx_errors = adapter->stats.ecol +
3190                                        adapter->stats.latecol;
3191         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3192         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3193         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3194
3195         /* Tx Dropped needs to be maintained elsewhere */
3196
3197         /* Phy Stats */
3198
3199         if(hw->media_type == e1000_media_type_copper) {
3200                 if((adapter->link_speed == SPEED_1000) &&
3201                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3202                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3203                         adapter->phy_stats.idle_errors += phy_tmp;
3204                 }
3205
3206                 if((hw->mac_type <= e1000_82546) &&
3207                    (hw->phy_type == e1000_phy_m88) &&
3208                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3209                         adapter->phy_stats.receive_errors += phy_tmp;
3210         }
3211
3212         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3213 }
3214
3215 #ifdef CONFIG_E1000_MQ
3216 void
3217 e1000_rx_schedule(void *data)
3218 {
3219         struct net_device *poll_dev, *netdev = data;
3220         struct e1000_adapter *adapter = netdev->priv;
3221         int this_cpu = get_cpu();
3222
3223         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3224         if (poll_dev == NULL) {
3225                 put_cpu();
3226                 return;
3227         }
3228
3229         if (likely(netif_rx_schedule_prep(poll_dev)))
3230                 __netif_rx_schedule(poll_dev);
3231         else
3232                 e1000_irq_enable(adapter);
3233
3234         put_cpu();
3235 }
3236 #endif
3237
3238 /**
3239  * e1000_intr - Interrupt Handler
3240  * @irq: interrupt number
3241  * @data: pointer to a network interface device structure
3242  * @pt_regs: CPU registers structure
3243  **/
3244
3245 static irqreturn_t
3246 e1000_intr(int irq, void *data, struct pt_regs *regs)
3247 {
3248         struct net_device *netdev = data;
3249         struct e1000_adapter *adapter = netdev_priv(netdev);
3250         struct e1000_hw *hw = &adapter->hw;
3251         uint32_t icr = E1000_READ_REG(hw, ICR);
3252 #ifndef CONFIG_E1000_NAPI
3253         int i;
3254 #else
3255         /* Interrupt Auto-Mask...upon reading ICR,
3256          * interrupts are masked.  No need for the
3257          * IMC write, but it does mean we should
3258          * account for it ASAP. */
3259         if (likely(hw->mac_type >= e1000_82571))
3260                 atomic_inc(&adapter->irq_sem);
3261 #endif
3262
3263         if (unlikely(!icr)) {
3264 #ifdef CONFIG_E1000_NAPI
3265                 if (hw->mac_type >= e1000_82571)
3266                         e1000_irq_enable(adapter);
3267 #endif
3268                 return IRQ_NONE;  /* Not our interrupt */
3269         }
3270
3271         if(unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3272                 hw->get_link_status = 1;
3273                 mod_timer(&adapter->watchdog_timer, jiffies);
3274         }
3275
3276 #ifdef CONFIG_E1000_NAPI
3277         if (unlikely(hw->mac_type < e1000_82571)) {
3278                 atomic_inc(&adapter->irq_sem);
3279                 E1000_WRITE_REG(hw, IMC, ~0);
3280                 E1000_WRITE_FLUSH(hw);
3281         }
3282 #ifdef CONFIG_E1000_MQ
3283         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3284                 /* We must setup the cpumask once count == 0 since
3285                  * each cpu bit is cleared when the work is done. */
3286                 adapter->rx_sched_call_data.cpumask = adapter->cpumask;
3287                 atomic_add(adapter->num_rx_queues - 1, &adapter->irq_sem);
3288                 atomic_set(&adapter->rx_sched_call_data.count,
3289                            adapter->num_rx_queues);
3290                 smp_call_async_mask(&adapter->rx_sched_call_data);
3291         } else {
3292                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3293         }
3294 #else /* if !CONFIG_E1000_MQ */
3295         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3296                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3297         else
3298                 e1000_irq_enable(adapter);
3299 #endif /* CONFIG_E1000_MQ */
3300
3301 #else /* if !CONFIG_E1000_NAPI */
3302         /* Writing IMC and IMS is needed for 82547.
3303            Due to Hub Link bus being occupied, an interrupt
3304            de-assertion message is not able to be sent.
3305            When an interrupt assertion message is generated later,
3306            two messages are re-ordered and sent out.
3307            That causes APIC to think 82547 is in de-assertion
3308            state, while 82547 is in assertion state, resulting
3309            in dead lock. Writing IMC forces 82547 into
3310            de-assertion state.
3311         */
3312         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2){
3313                 atomic_inc(&adapter->irq_sem);
3314                 E1000_WRITE_REG(hw, IMC, ~0);
3315         }
3316
3317         for(i = 0; i < E1000_MAX_INTR; i++)
3318                 if(unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3319                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3320                         break;
3321
3322         if(hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3323                 e1000_irq_enable(adapter);
3324
3325 #endif /* CONFIG_E1000_NAPI */
3326
3327         return IRQ_HANDLED;
3328 }
3329
3330 #ifdef CONFIG_E1000_NAPI
3331 /**
3332  * e1000_clean - NAPI Rx polling callback
3333  * @adapter: board private structure
3334  **/
3335
3336 static int
3337 e1000_clean(struct net_device *poll_dev, int *budget)
3338 {
3339         struct e1000_adapter *adapter;
3340         int work_to_do = min(*budget, poll_dev->quota);
3341         int tx_cleaned, i = 0, work_done = 0;
3342
3343         /* Must NOT use netdev_priv macro here. */
3344         adapter = poll_dev->priv;
3345
3346         /* Keep link state information with original netdev */
3347         if (!netif_carrier_ok(adapter->netdev))
3348                 goto quit_polling;
3349
3350         while (poll_dev != &adapter->polling_netdev[i]) {
3351                 i++;
3352                 if (unlikely(i == adapter->num_rx_queues))
3353                         BUG();
3354         }
3355
3356         tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3357         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3358                           &work_done, work_to_do);
3359
3360         *budget -= work_done;
3361         poll_dev->quota -= work_done;
3362
3363         /* If no Tx and not enough Rx work done, exit the polling mode */
3364         if((!tx_cleaned && (work_done == 0)) ||
3365            !netif_running(adapter->netdev)) {
3366 quit_polling:
3367                 netif_rx_complete(poll_dev);
3368                 e1000_irq_enable(adapter);
3369                 return 0;
3370         }
3371
3372         return 1;
3373 }
3374
3375 #endif
3376 /**
3377  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3378  * @adapter: board private structure
3379  **/
3380
3381 static boolean_t
3382 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3383                    struct e1000_tx_ring *tx_ring)
3384 {
3385         struct net_device *netdev = adapter->netdev;
3386         struct e1000_tx_desc *tx_desc, *eop_desc;
3387         struct e1000_buffer *buffer_info;
3388         unsigned int i, eop;
3389         boolean_t cleaned = FALSE;
3390
3391         i = tx_ring->next_to_clean;
3392         eop = tx_ring->buffer_info[i].next_to_watch;
3393         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3394
3395         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3396                 for(cleaned = FALSE; !cleaned; ) {
3397                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3398                         buffer_info = &tx_ring->buffer_info[i];
3399                         cleaned = (i == eop);
3400
3401                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3402
3403                         tx_desc->buffer_addr = 0;
3404                         tx_desc->lower.data = 0;
3405                         tx_desc->upper.data = 0;
3406
3407                         if(unlikely(++i == tx_ring->count)) i = 0;
3408                 }
3409
3410 #ifdef CONFIG_E1000_MQ
3411                 tx_ring->tx_stats.packets++;
3412 #endif
3413
3414                 eop = tx_ring->buffer_info[i].next_to_watch;
3415                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3416         }
3417
3418         tx_ring->next_to_clean = i;
3419
3420         spin_lock(&tx_ring->tx_lock);
3421
3422         if(unlikely(cleaned && netif_queue_stopped(netdev) &&
3423                     netif_carrier_ok(netdev)))
3424                 netif_wake_queue(netdev);
3425
3426         spin_unlock(&tx_ring->tx_lock);
3427
3428         if (adapter->detect_tx_hung) {
3429                 /* Detect a transmit hang in hardware, this serializes the
3430                  * check with the clearing of time_stamp and movement of i */
3431                 adapter->detect_tx_hung = FALSE;
3432                 if (tx_ring->buffer_info[eop].dma &&
3433                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3434                                adapter->tx_timeout_factor * HZ)
3435                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3436                          E1000_STATUS_TXOFF)) {
3437
3438                         /* detected Tx unit hang */
3439                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3440                                         "  Tx Queue             <%lu>\n"
3441                                         "  TDH                  <%x>\n"
3442                                         "  TDT                  <%x>\n"
3443                                         "  next_to_use          <%x>\n"
3444                                         "  next_to_clean        <%x>\n"
3445                                         "buffer_info[next_to_clean]\n"
3446                                         "  time_stamp           <%lx>\n"
3447                                         "  next_to_watch        <%x>\n"
3448                                         "  jiffies              <%lx>\n"
3449                                         "  next_to_watch.status <%x>\n",
3450                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3451                                         sizeof(struct e1000_tx_ring)),
3452                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3453                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3454                                 tx_ring->next_to_use,
3455                                 tx_ring->next_to_clean,
3456                                 tx_ring->buffer_info[eop].time_stamp,
3457                                 eop,
3458                                 jiffies,
3459                                 eop_desc->upper.fields.status);
3460                         netif_stop_queue(netdev);
3461                 }
3462         }
3463         return cleaned;
3464 }
3465
3466 /**
3467  * e1000_rx_checksum - Receive Checksum Offload for 82543
3468  * @adapter:     board private structure
3469  * @status_err:  receive descriptor status and error fields
3470  * @csum:        receive descriptor csum field
3471  * @sk_buff:     socket buffer with received data
3472  **/
3473
3474 static inline void
3475 e1000_rx_checksum(struct e1000_adapter *adapter,
3476                   uint32_t status_err, uint32_t csum,
3477                   struct sk_buff *skb)
3478 {
3479         uint16_t status = (uint16_t)status_err;
3480         uint8_t errors = (uint8_t)(status_err >> 24);
3481         skb->ip_summed = CHECKSUM_NONE;
3482
3483         /* 82543 or newer only */
3484         if(unlikely(adapter->hw.mac_type < e1000_82543)) return;
3485         /* Ignore Checksum bit is set */
3486         if(unlikely(status & E1000_RXD_STAT_IXSM)) return;
3487         /* TCP/UDP checksum error bit is set */
3488         if(unlikely(errors & E1000_RXD_ERR_TCPE)) {
3489                 /* let the stack verify checksum errors */
3490                 adapter->hw_csum_err++;
3491                 return;
3492         }
3493         /* TCP/UDP Checksum has not been calculated */
3494         if(adapter->hw.mac_type <= e1000_82547_rev_2) {
3495                 if(!(status & E1000_RXD_STAT_TCPCS))
3496                         return;
3497         } else {
3498                 if(!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3499                         return;
3500         }
3501         /* It must be a TCP or UDP packet with a valid checksum */
3502         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3503                 /* TCP checksum is good */
3504                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3505         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3506                 /* IP fragment with UDP payload */
3507                 /* Hardware complements the payload checksum, so we undo it
3508                  * and then put the value in host order for further stack use.
3509                  */
3510                 csum = ntohl(csum ^ 0xFFFF);
3511                 skb->csum = csum;
3512                 skb->ip_summed = CHECKSUM_HW;
3513         }
3514         adapter->hw_csum_good++;
3515 }
3516
3517 /**
3518  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3519  * @adapter: board private structure
3520  **/
3521
3522 static boolean_t
3523 #ifdef CONFIG_E1000_NAPI
3524 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3525                    struct e1000_rx_ring *rx_ring,
3526                    int *work_done, int work_to_do)
3527 #else
3528 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3529                    struct e1000_rx_ring *rx_ring)
3530 #endif
3531 {
3532         struct net_device *netdev = adapter->netdev;
3533         struct pci_dev *pdev = adapter->pdev;
3534         struct e1000_rx_desc *rx_desc;
3535         struct e1000_buffer *buffer_info;
3536         struct sk_buff *skb;
3537         unsigned long flags;
3538         uint32_t length;
3539         uint8_t last_byte;
3540         unsigned int i;
3541         boolean_t cleaned = FALSE;
3542
3543         i = rx_ring->next_to_clean;
3544         rx_desc = E1000_RX_DESC(*rx_ring, i);
3545
3546         while(rx_desc->status & E1000_RXD_STAT_DD) {
3547                 buffer_info = &rx_ring->buffer_info[i];
3548 #ifdef CONFIG_E1000_NAPI
3549                 if(*work_done >= work_to_do)
3550                         break;
3551                 (*work_done)++;
3552 #endif
3553                 cleaned = TRUE;
3554
3555                 pci_unmap_single(pdev,
3556                                  buffer_info->dma,
3557                                  buffer_info->length,
3558                                  PCI_DMA_FROMDEVICE);
3559
3560                 skb = buffer_info->skb;
3561                 length = le16_to_cpu(rx_desc->length);
3562
3563                 if(unlikely(!(rx_desc->status & E1000_RXD_STAT_EOP))) {
3564                         /* All receives must fit into a single buffer */
3565                         E1000_DBG("%s: Receive packet consumed multiple"
3566                                   " buffers\n", netdev->name);
3567                         dev_kfree_skb_irq(skb);
3568                         goto next_desc;
3569                 }
3570
3571                 if(unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3572                         last_byte = *(skb->data + length - 1);
3573                         if(TBI_ACCEPT(&adapter->hw, rx_desc->status,
3574                                       rx_desc->errors, length, last_byte)) {
3575                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3576                                 e1000_tbi_adjust_stats(&adapter->hw,
3577                                                        &adapter->stats,
3578                                                        length, skb->data);
3579                                 spin_unlock_irqrestore(&adapter->stats_lock,
3580                                                        flags);
3581                                 length--;
3582                         } else {
3583                                 dev_kfree_skb_irq(skb);
3584                                 goto next_desc;
3585                         }
3586                 }
3587
3588                 /* Good Receive */
3589                 skb_put(skb, length - ETHERNET_FCS_SIZE);
3590
3591                 /* Receive Checksum Offload */
3592                 e1000_rx_checksum(adapter,
3593                                   (uint32_t)(rx_desc->status) |
3594                                   ((uint32_t)(rx_desc->errors) << 24),
3595                                   rx_desc->csum, skb);
3596                 skb->protocol = eth_type_trans(skb, netdev);
3597 #ifdef CONFIG_E1000_NAPI
3598                 if(unlikely(adapter->vlgrp &&
3599                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3600                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3601                                                  le16_to_cpu(rx_desc->special) &
3602                                                  E1000_RXD_SPC_VLAN_MASK);
3603                 } else {
3604                         netif_receive_skb(skb);
3605                 }
3606 #else /* CONFIG_E1000_NAPI */
3607                 if(unlikely(adapter->vlgrp &&
3608                             (rx_desc->status & E1000_RXD_STAT_VP))) {
3609                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3610                                         le16_to_cpu(rx_desc->special) &
3611                                         E1000_RXD_SPC_VLAN_MASK);
3612                 } else {
3613                         netif_rx(skb);
3614                 }
3615 #endif /* CONFIG_E1000_NAPI */
3616                 netdev->last_rx = jiffies;
3617 #ifdef CONFIG_E1000_MQ
3618                 rx_ring->rx_stats.packets++;
3619                 rx_ring->rx_stats.bytes += length;
3620 #endif
3621
3622 next_desc:
3623                 rx_desc->status = 0;
3624                 buffer_info->skb = NULL;
3625                 if(unlikely(++i == rx_ring->count)) i = 0;
3626
3627                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3628         }
3629         rx_ring->next_to_clean = i;
3630         adapter->alloc_rx_buf(adapter, rx_ring);
3631
3632         return cleaned;
3633 }
3634
3635 /**
3636  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3637  * @adapter: board private structure
3638  **/
3639
3640 static boolean_t
3641 #ifdef CONFIG_E1000_NAPI
3642 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3643                       struct e1000_rx_ring *rx_ring,
3644                       int *work_done, int work_to_do)
3645 #else
3646 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3647                       struct e1000_rx_ring *rx_ring)
3648 #endif
3649 {
3650         union e1000_rx_desc_packet_split *rx_desc;
3651         struct net_device *netdev = adapter->netdev;
3652         struct pci_dev *pdev = adapter->pdev;
3653         struct e1000_buffer *buffer_info;
3654         struct e1000_ps_page *ps_page;
3655         struct e1000_ps_page_dma *ps_page_dma;
3656         struct sk_buff *skb;
3657         unsigned int i, j;
3658         uint32_t length, staterr;
3659         boolean_t cleaned = FALSE;
3660
3661         i = rx_ring->next_to_clean;
3662         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3663         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3664
3665         while(staterr & E1000_RXD_STAT_DD) {
3666                 buffer_info = &rx_ring->buffer_info[i];
3667                 ps_page = &rx_ring->ps_page[i];
3668                 ps_page_dma = &rx_ring->ps_page_dma[i];
3669 #ifdef CONFIG_E1000_NAPI
3670                 if(unlikely(*work_done >= work_to_do))
3671                         break;
3672                 (*work_done)++;
3673 #endif
3674                 cleaned = TRUE;
3675                 pci_unmap_single(pdev, buffer_info->dma,
3676                                  buffer_info->length,
3677                                  PCI_DMA_FROMDEVICE);
3678
3679                 skb = buffer_info->skb;
3680
3681                 if(unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3682                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3683                                   " the full packet\n", netdev->name);
3684                         dev_kfree_skb_irq(skb);
3685                         goto next_desc;
3686                 }
3687
3688                 if(unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3689                         dev_kfree_skb_irq(skb);
3690                         goto next_desc;
3691                 }
3692
3693                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3694
3695                 if(unlikely(!length)) {
3696                         E1000_DBG("%s: Last part of the packet spanning"
3697                                   " multiple descriptors\n", netdev->name);
3698                         dev_kfree_skb_irq(skb);
3699                         goto next_desc;
3700                 }
3701
3702                 /* Good Receive */
3703                 skb_put(skb, length);
3704
3705                 for(j = 0; j < adapter->rx_ps_pages; j++) {
3706                         if(!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3707                                 break;
3708
3709                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3710                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3711                         ps_page_dma->ps_page_dma[j] = 0;
3712                         skb_shinfo(skb)->frags[j].page =
3713                                 ps_page->ps_page[j];
3714                         ps_page->ps_page[j] = NULL;
3715                         skb_shinfo(skb)->frags[j].page_offset = 0;
3716                         skb_shinfo(skb)->frags[j].size = length;
3717                         skb_shinfo(skb)->nr_frags++;
3718                         skb->len += length;
3719                         skb->data_len += length;
3720                 }
3721
3722                 e1000_rx_checksum(adapter, staterr,
3723                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3724                 skb->protocol = eth_type_trans(skb, netdev);
3725
3726                 if(likely(rx_desc->wb.upper.header_status &
3727                           E1000_RXDPS_HDRSTAT_HDRSP)) {
3728                         adapter->rx_hdr_split++;
3729 #ifdef HAVE_RX_ZERO_COPY
3730                         skb_shinfo(skb)->zero_copy = TRUE;
3731 #endif
3732                 }
3733 #ifdef CONFIG_E1000_NAPI
3734                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3735                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3736                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3737                                 E1000_RXD_SPC_VLAN_MASK);
3738                 } else {
3739                         netif_receive_skb(skb);
3740                 }
3741 #else /* CONFIG_E1000_NAPI */
3742                 if(unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3743                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3744                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3745                                 E1000_RXD_SPC_VLAN_MASK);
3746                 } else {
3747                         netif_rx(skb);
3748                 }
3749 #endif /* CONFIG_E1000_NAPI */
3750                 netdev->last_rx = jiffies;
3751 #ifdef CONFIG_E1000_MQ
3752                 rx_ring->rx_stats.packets++;
3753                 rx_ring->rx_stats.bytes += length;
3754 #endif
3755
3756 next_desc:
3757                 rx_desc->wb.middle.status_error &= ~0xFF;
3758                 buffer_info->skb = NULL;
3759                 if(unlikely(++i == rx_ring->count)) i = 0;
3760
3761                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3762                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3763         }
3764         rx_ring->next_to_clean = i;
3765         adapter->alloc_rx_buf(adapter, rx_ring);
3766
3767         return cleaned;
3768 }
3769
3770 /**
3771  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3772  * @adapter: address of board private structure
3773  **/
3774
3775 static void
3776 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3777                        struct e1000_rx_ring *rx_ring)
3778 {
3779         struct net_device *netdev = adapter->netdev;
3780         struct pci_dev *pdev = adapter->pdev;
3781         struct e1000_rx_desc *rx_desc;
3782         struct e1000_buffer *buffer_info;
3783         struct sk_buff *skb;
3784         unsigned int i;
3785         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3786
3787         i = rx_ring->next_to_use;
3788         buffer_info = &rx_ring->buffer_info[i];
3789
3790         while(!buffer_info->skb) {
3791                 skb = dev_alloc_skb(bufsz);
3792
3793                 if(unlikely(!skb)) {
3794                         /* Better luck next round */
3795                         break;
3796                 }
3797
3798                 /* Fix for errata 23, can't cross 64kB boundary */
3799                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3800                         struct sk_buff *oldskb = skb;
3801                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3802                                              "at %p\n", bufsz, skb->data);
3803                         /* Try again, without freeing the previous */
3804                         skb = dev_alloc_skb(bufsz);
3805                         /* Failed allocation, critical failure */
3806                         if (!skb) {
3807                                 dev_kfree_skb(oldskb);
3808                                 break;
3809                         }
3810
3811                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3812                                 /* give up */
3813                                 dev_kfree_skb(skb);
3814                                 dev_kfree_skb(oldskb);
3815                                 break; /* while !buffer_info->skb */
3816                         } else {
3817                                 /* Use new allocation */
3818                                 dev_kfree_skb(oldskb);
3819                         }
3820                 }
3821                 /* Make buffer alignment 2 beyond a 16 byte boundary
3822                  * this will result in a 16 byte aligned IP header after
3823                  * the 14 byte MAC header is removed
3824                  */
3825                 skb_reserve(skb, NET_IP_ALIGN);
3826
3827                 skb->dev = netdev;
3828
3829                 buffer_info->skb = skb;
3830                 buffer_info->length = adapter->rx_buffer_len;
3831                 buffer_info->dma = pci_map_single(pdev,
3832                                                   skb->data,
3833                                                   adapter->rx_buffer_len,
3834                                                   PCI_DMA_FROMDEVICE);
3835
3836                 /* Fix for errata 23, can't cross 64kB boundary */
3837                 if (!e1000_check_64k_bound(adapter,
3838                                         (void *)(unsigned long)buffer_info->dma,
3839                                         adapter->rx_buffer_len)) {
3840                         DPRINTK(RX_ERR, ERR,
3841                                 "dma align check failed: %u bytes at %p\n",
3842                                 adapter->rx_buffer_len,
3843                                 (void *)(unsigned long)buffer_info->dma);
3844                         dev_kfree_skb(skb);
3845                         buffer_info->skb = NULL;
3846
3847                         pci_unmap_single(pdev, buffer_info->dma,
3848                                          adapter->rx_buffer_len,
3849                                          PCI_DMA_FROMDEVICE);
3850
3851                         break; /* while !buffer_info->skb */
3852                 }
3853                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3854                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3855
3856                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3857                         /* Force memory writes to complete before letting h/w
3858                          * know there are new descriptors to fetch.  (Only
3859                          * applicable for weak-ordered memory model archs,
3860                          * such as IA-64). */
3861                         wmb();
3862                         writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3863                 }
3864
3865                 if(unlikely(++i == rx_ring->count)) i = 0;
3866                 buffer_info = &rx_ring->buffer_info[i];
3867         }
3868
3869         rx_ring->next_to_use = i;
3870 }
3871
3872 /**
3873  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3874  * @adapter: address of board private structure
3875  **/
3876
3877 static void
3878 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3879                           struct e1000_rx_ring *rx_ring)
3880 {
3881         struct net_device *netdev = adapter->netdev;
3882         struct pci_dev *pdev = adapter->pdev;
3883         union e1000_rx_desc_packet_split *rx_desc;
3884         struct e1000_buffer *buffer_info;
3885         struct e1000_ps_page *ps_page;
3886         struct e1000_ps_page_dma *ps_page_dma;
3887         struct sk_buff *skb;
3888         unsigned int i, j;
3889
3890         i = rx_ring->next_to_use;
3891         buffer_info = &rx_ring->buffer_info[i];
3892         ps_page = &rx_ring->ps_page[i];
3893         ps_page_dma = &rx_ring->ps_page_dma[i];
3894
3895         while(!buffer_info->skb) {
3896                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3897
3898                 for(j = 0; j < PS_PAGE_BUFFERS; j++) {
3899                         if (j < adapter->rx_ps_pages) {
3900                                 if (likely(!ps_page->ps_page[j])) {
3901                                         ps_page->ps_page[j] =
3902                                                 alloc_page(GFP_ATOMIC);
3903                                         if (unlikely(!ps_page->ps_page[j]))
3904                                                 goto no_buffers;
3905                                         ps_page_dma->ps_page_dma[j] =
3906                                                 pci_map_page(pdev,
3907                                                             ps_page->ps_page[j],
3908                                                             0, PAGE_SIZE,
3909                                                             PCI_DMA_FROMDEVICE);
3910                                 }
3911                                 /* Refresh the desc even if buffer_addrs didn't
3912                                  * change because each write-back erases
3913                                  * this info.
3914                                  */
3915                                 rx_desc->read.buffer_addr[j+1] =
3916                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3917                         } else
3918                                 rx_desc->read.buffer_addr[j+1] = ~0;
3919                 }
3920
3921                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3922
3923                 if(unlikely(!skb))
3924                         break;
3925
3926                 /* Make buffer alignment 2 beyond a 16 byte boundary
3927                  * this will result in a 16 byte aligned IP header after
3928                  * the 14 byte MAC header is removed
3929                  */
3930                 skb_reserve(skb, NET_IP_ALIGN);
3931
3932                 skb->dev = netdev;
3933
3934                 buffer_info->skb = skb;
3935                 buffer_info->length = adapter->rx_ps_bsize0;
3936                 buffer_info->dma = pci_map_single(pdev, skb->data,
3937                                                   adapter->rx_ps_bsize0,
3938                                                   PCI_DMA_FROMDEVICE);
3939
3940                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3941
3942                 if(unlikely((i & ~(E1000_RX_BUFFER_WRITE - 1)) == i)) {
3943                         /* Force memory writes to complete before letting h/w
3944                          * know there are new descriptors to fetch.  (Only
3945                          * applicable for weak-ordered memory model archs,
3946                          * such as IA-64). */
3947                         wmb();
3948                         /* Hardware increments by 16 bytes, but packet split
3949                          * descriptors are 32 bytes...so we increment tail
3950                          * twice as much.
3951                          */
3952                         writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3953                 }
3954
3955                 if(unlikely(++i == rx_ring->count)) i = 0;
3956                 buffer_info = &rx_ring->buffer_info[i];
3957                 ps_page = &rx_ring->ps_page[i];
3958                 ps_page_dma = &rx_ring->ps_page_dma[i];
3959         }
3960
3961 no_buffers:
3962         rx_ring->next_to_use = i;
3963 }
3964
3965 /**
3966  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3967  * @adapter:
3968  **/
3969
3970 static void
3971 e1000_smartspeed(struct e1000_adapter *adapter)
3972 {
3973         uint16_t phy_status;
3974         uint16_t phy_ctrl;
3975
3976         if((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3977            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3978                 return;
3979
3980         if(adapter->smartspeed == 0) {
3981                 /* If Master/Slave config fault is asserted twice,
3982                  * we assume back-to-back */
3983                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3984                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3985                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3986                 if(!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3987                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3988                 if(phy_ctrl & CR_1000T_MS_ENABLE) {
3989                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3990                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3991                                             phy_ctrl);
3992                         adapter->smartspeed++;
3993                         if(!e1000_phy_setup_autoneg(&adapter->hw) &&
3994                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3995                                                &phy_ctrl)) {
3996                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3997                                              MII_CR_RESTART_AUTO_NEG);
3998                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3999                                                     phy_ctrl);
4000                         }
4001                 }
4002                 return;
4003         } else if(adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4004                 /* If still no link, perhaps using 2/3 pair cable */
4005                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4006                 phy_ctrl |= CR_1000T_MS_ENABLE;
4007                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4008                 if(!e1000_phy_setup_autoneg(&adapter->hw) &&
4009                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4010                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4011                                      MII_CR_RESTART_AUTO_NEG);
4012                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4013                 }
4014         }
4015         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4016         if(adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4017                 adapter->smartspeed = 0;
4018 }
4019
4020 /**
4021  * e1000_ioctl -
4022  * @netdev:
4023  * @ifreq:
4024  * @cmd:
4025  **/
4026
4027 static int
4028 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4029 {
4030         switch (cmd) {
4031         case SIOCGMIIPHY:
4032         case SIOCGMIIREG:
4033         case SIOCSMIIREG:
4034                 return e1000_mii_ioctl(netdev, ifr, cmd);
4035         default:
4036                 return -EOPNOTSUPP;
4037         }
4038 }
4039
4040 /**
4041  * e1000_mii_ioctl -
4042  * @netdev:
4043  * @ifreq:
4044  * @cmd:
4045  **/
4046
4047 static int
4048 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4049 {
4050         struct e1000_adapter *adapter = netdev_priv(netdev);
4051         struct mii_ioctl_data *data = if_mii(ifr);
4052         int retval;
4053         uint16_t mii_reg;
4054         uint16_t spddplx;
4055         unsigned long flags;
4056
4057         if(adapter->hw.media_type != e1000_media_type_copper)
4058                 return -EOPNOTSUPP;
4059
4060         switch (cmd) {
4061         case SIOCGMIIPHY:
4062                 data->phy_id = adapter->hw.phy_addr;
4063                 break;
4064         case SIOCGMIIREG:
4065                 if(!capable(CAP_NET_ADMIN))
4066                         return -EPERM;
4067                 spin_lock_irqsave(&adapter->stats_lock, flags);
4068                 if(e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4069                                    &data->val_out)) {
4070                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4071                         return -EIO;
4072                 }
4073                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4074                 break;
4075         case SIOCSMIIREG:
4076                 if(!capable(CAP_NET_ADMIN))
4077                         return -EPERM;
4078                 if(data->reg_num & ~(0x1F))
4079                         return -EFAULT;
4080                 mii_reg = data->val_in;
4081                 spin_lock_irqsave(&adapter->stats_lock, flags);
4082                 if(e1000_write_phy_reg(&adapter->hw, data->reg_num,
4083                                         mii_reg)) {
4084                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4085                         return -EIO;
4086                 }
4087                 if(adapter->hw.phy_type == e1000_phy_m88) {
4088                         switch (data->reg_num) {
4089                         case PHY_CTRL:
4090                                 if(mii_reg & MII_CR_POWER_DOWN)
4091                                         break;
4092                                 if(mii_reg & MII_CR_AUTO_NEG_EN) {
4093                                         adapter->hw.autoneg = 1;
4094                                         adapter->hw.autoneg_advertised = 0x2F;
4095                                 } else {
4096                                         if (mii_reg & 0x40)
4097                                                 spddplx = SPEED_1000;
4098                                         else if (mii_reg & 0x2000)
4099                                                 spddplx = SPEED_100;
4100                                         else
4101                                                 spddplx = SPEED_10;
4102                                         spddplx += (mii_reg & 0x100)
4103                                                    ? FULL_DUPLEX :
4104                                                    HALF_DUPLEX;
4105                                         retval = e1000_set_spd_dplx(adapter,
4106                                                                     spddplx);
4107                                         if(retval) {
4108                                                 spin_unlock_irqrestore(
4109                                                         &adapter->stats_lock,
4110                                                         flags);
4111                                                 return retval;
4112                                         }
4113                                 }
4114                                 if(netif_running(adapter->netdev)) {
4115                                         e1000_down(adapter);
4116                                         e1000_up(adapter);
4117                                 } else
4118                                         e1000_reset(adapter);
4119                                 break;
4120                         case M88E1000_PHY_SPEC_CTRL:
4121                         case M88E1000_EXT_PHY_SPEC_CTRL:
4122                                 if(e1000_phy_reset(&adapter->hw)) {
4123                                         spin_unlock_irqrestore(
4124                                                 &adapter->stats_lock, flags);
4125                                         return -EIO;
4126                                 }
4127                                 break;
4128                         }
4129                 } else {
4130                         switch (data->reg_num) {
4131                         case PHY_CTRL:
4132                                 if(mii_reg & MII_CR_POWER_DOWN)
4133                                         break;
4134                                 if(netif_running(adapter->netdev)) {
4135                                         e1000_down(adapter);
4136                                         e1000_up(adapter);
4137                                 } else
4138                                         e1000_reset(adapter);
4139                                 break;
4140                         }
4141                 }
4142                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4143                 break;
4144         default:
4145                 return -EOPNOTSUPP;
4146         }
4147         return E1000_SUCCESS;
4148 }
4149
4150 void
4151 e1000_pci_set_mwi(struct e1000_hw *hw)
4152 {
4153         struct e1000_adapter *adapter = hw->back;
4154         int ret_val = pci_set_mwi(adapter->pdev);
4155
4156         if(ret_val)
4157                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4158 }
4159
4160 void
4161 e1000_pci_clear_mwi(struct e1000_hw *hw)
4162 {
4163         struct e1000_adapter *adapter = hw->back;
4164
4165         pci_clear_mwi(adapter->pdev);
4166 }
4167
4168 void
4169 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4170 {
4171         struct e1000_adapter *adapter = hw->back;
4172
4173         pci_read_config_word(adapter->pdev, reg, value);
4174 }
4175
4176 void
4177 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4178 {
4179         struct e1000_adapter *adapter = hw->back;
4180
4181         pci_write_config_word(adapter->pdev, reg, *value);
4182 }
4183
4184 uint32_t
4185 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4186 {
4187         return inl(port);
4188 }
4189
4190 void
4191 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4192 {
4193         outl(value, port);
4194 }
4195
4196 static void
4197 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4198 {
4199         struct e1000_adapter *adapter = netdev_priv(netdev);
4200         uint32_t ctrl, rctl;
4201
4202         e1000_irq_disable(adapter);
4203         adapter->vlgrp = grp;
4204
4205         if(grp) {
4206                 /* enable VLAN tag insert/strip */
4207                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4208                 ctrl |= E1000_CTRL_VME;
4209                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4210
4211                 /* enable VLAN receive filtering */
4212                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4213                 rctl |= E1000_RCTL_VFE;
4214                 rctl &= ~E1000_RCTL_CFIEN;
4215                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4216                 e1000_update_mng_vlan(adapter);
4217         } else {
4218                 /* disable VLAN tag insert/strip */
4219                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4220                 ctrl &= ~E1000_CTRL_VME;
4221                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4222
4223                 /* disable VLAN filtering */
4224                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4225                 rctl &= ~E1000_RCTL_VFE;
4226                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4227                 if(adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4228                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4229                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4230                 }
4231         }
4232
4233         e1000_irq_enable(adapter);
4234 }
4235
4236 static void
4237 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4238 {
4239         struct e1000_adapter *adapter = netdev_priv(netdev);
4240         uint32_t vfta, index;
4241         if((adapter->hw.mng_cookie.status &
4242                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4243                 (vid == adapter->mng_vlan_id))
4244                 return;
4245         /* add VID to filter table */
4246         index = (vid >> 5) & 0x7F;
4247         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4248         vfta |= (1 << (vid & 0x1F));
4249         e1000_write_vfta(&adapter->hw, index, vfta);
4250 }
4251
4252 static void
4253 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4254 {
4255         struct e1000_adapter *adapter = netdev_priv(netdev);
4256         uint32_t vfta, index;
4257
4258         e1000_irq_disable(adapter);
4259
4260         if(adapter->vlgrp)
4261                 adapter->vlgrp->vlan_devices[vid] = NULL;
4262
4263         e1000_irq_enable(adapter);
4264
4265         if((adapter->hw.mng_cookie.status &
4266                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4267             (vid == adapter->mng_vlan_id)) {
4268                 /* release control to f/w */
4269                 e1000_release_hw_control(adapter);
4270                 return;
4271         }
4272
4273         /* remove VID from filter table */
4274         index = (vid >> 5) & 0x7F;
4275         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4276         vfta &= ~(1 << (vid & 0x1F));
4277         e1000_write_vfta(&adapter->hw, index, vfta);
4278 }
4279
4280 static void
4281 e1000_restore_vlan(struct e1000_adapter *adapter)
4282 {
4283         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4284
4285         if(adapter->vlgrp) {
4286                 uint16_t vid;
4287                 for(vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4288                         if(!adapter->vlgrp->vlan_devices[vid])
4289                                 continue;
4290                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4291                 }
4292         }
4293 }
4294
4295 int
4296 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4297 {
4298         adapter->hw.autoneg = 0;
4299
4300         /* Fiber NICs only allow 1000 gbps Full duplex */
4301         if((adapter->hw.media_type == e1000_media_type_fiber) &&
4302                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4303                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4304                 return -EINVAL;
4305         }
4306
4307         switch(spddplx) {
4308         case SPEED_10 + DUPLEX_HALF:
4309                 adapter->hw.forced_speed_duplex = e1000_10_half;
4310                 break;
4311         case SPEED_10 + DUPLEX_FULL:
4312                 adapter->hw.forced_speed_duplex = e1000_10_full;
4313                 break;
4314         case SPEED_100 + DUPLEX_HALF:
4315                 adapter->hw.forced_speed_duplex = e1000_100_half;
4316                 break;
4317         case SPEED_100 + DUPLEX_FULL:
4318                 adapter->hw.forced_speed_duplex = e1000_100_full;
4319                 break;
4320         case SPEED_1000 + DUPLEX_FULL:
4321                 adapter->hw.autoneg = 1;
4322                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4323                 break;
4324         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4325         default:
4326                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4327                 return -EINVAL;
4328         }
4329         return 0;
4330 }
4331
4332 #ifdef CONFIG_PM
4333 static int
4334 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4335 {
4336         struct net_device *netdev = pci_get_drvdata(pdev);
4337         struct e1000_adapter *adapter = netdev_priv(netdev);
4338         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4339         uint32_t wufc = adapter->wol;
4340
4341         netif_device_detach(netdev);
4342
4343         if(netif_running(netdev))
4344                 e1000_down(adapter);
4345
4346         status = E1000_READ_REG(&adapter->hw, STATUS);
4347         if(status & E1000_STATUS_LU)
4348                 wufc &= ~E1000_WUFC_LNKC;
4349
4350         if(wufc) {
4351                 e1000_setup_rctl(adapter);
4352                 e1000_set_multi(netdev);
4353
4354                 /* turn on all-multi mode if wake on multicast is enabled */
4355                 if(adapter->wol & E1000_WUFC_MC) {
4356                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4357                         rctl |= E1000_RCTL_MPE;
4358                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4359                 }
4360
4361                 if(adapter->hw.mac_type >= e1000_82540) {
4362                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4363                         /* advertise wake from D3Cold */
4364                         #define E1000_CTRL_ADVD3WUC 0x00100000
4365                         /* phy power management enable */
4366                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4367                         ctrl |= E1000_CTRL_ADVD3WUC |
4368                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4369                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4370                 }
4371
4372                 if(adapter->hw.media_type == e1000_media_type_fiber ||
4373                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4374                         /* keep the laser running in D3 */
4375                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4376                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4377                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4378                 }
4379
4380                 /* Allow time for pending master requests to run */
4381                 e1000_disable_pciex_master(&adapter->hw);
4382
4383                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4384                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4385                 pci_enable_wake(pdev, 3, 1);
4386                 pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4387         } else {
4388                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4389                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4390                 pci_enable_wake(pdev, 3, 0);
4391                 pci_enable_wake(pdev, 4, 0); /* 4 == D3 cold */
4392         }
4393
4394         pci_save_state(pdev);
4395
4396         if(adapter->hw.mac_type >= e1000_82540 &&
4397            adapter->hw.media_type == e1000_media_type_copper) {
4398                 manc = E1000_READ_REG(&adapter->hw, MANC);
4399                 if(manc & E1000_MANC_SMBUS_EN) {
4400                         manc |= E1000_MANC_ARP_EN;
4401                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4402                         pci_enable_wake(pdev, 3, 1);
4403                         pci_enable_wake(pdev, 4, 1); /* 4 == D3 cold */
4404                 }
4405         }
4406
4407         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4408          * would have already happened in close and is redundant. */
4409         e1000_release_hw_control(adapter);
4410
4411         pci_disable_device(pdev);
4412         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4413
4414         return 0;
4415 }
4416
4417 static int
4418 e1000_resume(struct pci_dev *pdev)
4419 {
4420         struct net_device *netdev = pci_get_drvdata(pdev);
4421         struct e1000_adapter *adapter = netdev_priv(netdev);
4422         uint32_t manc, ret_val;
4423
4424         pci_set_power_state(pdev, PCI_D0);
4425         pci_restore_state(pdev);
4426         ret_val = pci_enable_device(pdev);
4427         pci_set_master(pdev);
4428
4429         pci_enable_wake(pdev, PCI_D3hot, 0);
4430         pci_enable_wake(pdev, PCI_D3cold, 0);
4431
4432         e1000_reset(adapter);
4433         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4434
4435         if(netif_running(netdev))
4436                 e1000_up(adapter);
4437
4438         netif_device_attach(netdev);
4439
4440         if(adapter->hw.mac_type >= e1000_82540 &&
4441            adapter->hw.media_type == e1000_media_type_copper) {
4442                 manc = E1000_READ_REG(&adapter->hw, MANC);
4443                 manc &= ~(E1000_MANC_ARP_EN);
4444                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4445         }
4446
4447         /* If the controller is 82573 and f/w is AMT, do not set
4448          * DRV_LOAD until the interface is up.  For all other cases,
4449          * let the f/w know that the h/w is now under the control
4450          * of the driver. */
4451         if (adapter->hw.mac_type != e1000_82573 ||
4452             !e1000_check_mng_mode(&adapter->hw))
4453                 e1000_get_hw_control(adapter);
4454
4455         return 0;
4456 }
4457 #endif
4458 #ifdef CONFIG_NET_POLL_CONTROLLER
4459 /*
4460  * Polling 'interrupt' - used by things like netconsole to send skbs
4461  * without having to re-enable interrupts. It's not called while
4462  * the interrupt routine is executing.
4463  */
4464 static void
4465 e1000_netpoll(struct net_device *netdev)
4466 {
4467         struct e1000_adapter *adapter = netdev_priv(netdev);
4468         disable_irq(adapter->pdev->irq);
4469         e1000_intr(adapter->pdev->irq, netdev, NULL);
4470         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4471 #ifndef CONFIG_E1000_NAPI
4472         adapter->clean_rx(adapter, adapter->rx_ring);
4473 #endif
4474         enable_irq(adapter->pdev->irq);
4475 }
4476 #endif
4477
4478 /* e1000_main.c */