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  * 6.3.9        12/16/2005
  33  *   o incorporate fix for recycled skbs from IBM LTC
  34  * 6.3.7        11/18/2005
  35  *   o Honor eeprom setting for enabling/disabling Wake On Lan
  36  * 6.3.5        11/17/2005
  37  *   o Fix memory leak in rx ring handling for PCI Express adapters
  38  * 6.3.4        11/8/05
  39  *   o Patch from Jesper Juhl to remove redundant NULL checks for kfree
  40  * 6.3.2        9/20/05
  41  *   o Render logic that sets/resets DRV_LOAD as inline functions to
  42  *     avoid code replication. If f/w is AMT then set DRV_LOAD only when
  43  *     network interface is open.
  44  *   o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
  45  *   o Adjust PBA partioning for Jumbo frames using MTU size and not
  46  *     rx_buffer_len
  47  * 6.3.1        9/19/05
  48  *   o Use adapter->tx_timeout_factor in Tx Hung Detect logic
  49        (e1000_clean_tx_irq)
  50  *   o Support for 8086:10B5 device (Quad Port)
  51  * 6.2.14       9/15/05
  52  *   o In AMT enabled configurations, set/reset DRV_LOAD bit on interface
  53  *     open/close
  54  * 6.2.13       9/14/05
  55  *   o Invoke e1000_check_mng_mode only for 8257x controllers since it
  56  *     accesses the FWSM that is not supported in other controllers
  57  * 6.2.12       9/9/05
  58  *   o Add support for device id E1000_DEV_ID_82546GB_QUAD_COPPER
  59  *   o set RCTL:SECRC only for controllers newer than 82543.
  60  *   o When the n/w interface comes down reset DRV_LOAD bit to notify f/w.
  61  *     This code was moved from e1000_remove to e1000_close
  62  * 6.2.10       9/6/05
  63  *   o Fix error in updating RDT in el1000_alloc_rx_buffers[_ps] -- one off.
  64  *   o Enable fc by default on 82573 controllers (do not read eeprom)
  65  *   o Fix rx_errors statistic not to include missed_packet_count
  66  *   o Fix rx_dropped statistic not to include missed_packet_count
  67        (Padraig Brady)
  68  * 6.2.9        8/30/05
  69  *   o Remove call to update statistics from the controller ib e1000_get_stats
  70  * 6.2.8        8/30/05
  71  *   o Improved algorithm for rx buffer allocation/rdt update
  72  *   o Flow control watermarks relative to rx PBA size
  73  *   o Simplified 'Tx Hung' detect logic
  74  * 6.2.7        8/17/05
  75  *   o Report rx buffer allocation failures and tx timeout counts in stats
  76  * 6.2.6        8/16/05
  77  *   o Implement workaround for controller erratum -- linear non-tso packet
  78  *     following a TSO gets written back prematurely
  79  * 6.2.5        8/15/05
  80  *   o Set netdev->tx_queue_len based on link speed/duplex settings.
  81  *   o Fix net_stats.rx_fifo_errors <p@draigBrady.com>
  82  *   o Do not power off PHY if SoL/IDER session is active
  83  * 6.2.4        8/10/05
  84  *   o Fix loopback test setup/cleanup for 82571/3 controllers
  85  *   o Fix parsing of outgoing packets (e1000_transfer_dhcp_info) to treat
  86  *     all packets as raw
  87  *   o Prevent operations that will cause the PHY to be reset if SoL/IDER
  88  *     sessions are active and log a message
  89  * 6.2.2        7/21/05
  90  *   o used fixed size descriptors for all MTU sizes, reduces memory load
  91  * 6.1.2        4/13/05
  92  *   o Fixed ethtool diagnostics
  93  *   o Enabled flow control to take default eeprom settings
  94  *   o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
  95  *     calls, one from mii_ioctl and other from within update_stats while
  96  *     processing MIIREG ioctl.
  97  */
  98
  99 char e1000_driver_name[] = "e1000";
 100 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
 101 #ifndef CONFIG_E1000_NAPI
 102 #define DRIVERNAPI
 103 #else
 104 #define DRIVERNAPI "-NAPI"
 105 #endif
 106 #define DRV_VERSION "7.0.33-k2"DRIVERNAPI
 107 char e1000_driver_version[] = DRV_VERSION;
 108 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
 109
 110 /* e1000_pci_tbl - PCI Device ID Table
 111  *
 112  * Last entry must be all 0s
 113  *
 114  * Macro expands to...
 115  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
 116  */
 117 static struct pci_device_id e1000_pci_tbl[] = {
 118         INTEL_E1000_ETHERNET_DEVICE(0x1000),
 119         INTEL_E1000_ETHERNET_DEVICE(0x1001),
 120         INTEL_E1000_ETHERNET_DEVICE(0x1004),
 121         INTEL_E1000_ETHERNET_DEVICE(0x1008),
 122         INTEL_E1000_ETHERNET_DEVICE(0x1009),
 123         INTEL_E1000_ETHERNET_DEVICE(0x100C),
 124         INTEL_E1000_ETHERNET_DEVICE(0x100D),
 125         INTEL_E1000_ETHERNET_DEVICE(0x100E),
 126         INTEL_E1000_ETHERNET_DEVICE(0x100F),
 127         INTEL_E1000_ETHERNET_DEVICE(0x1010),
 128         INTEL_E1000_ETHERNET_DEVICE(0x1011),
 129         INTEL_E1000_ETHERNET_DEVICE(0x1012),
 130         INTEL_E1000_ETHERNET_DEVICE(0x1013),
 131         INTEL_E1000_ETHERNET_DEVICE(0x1014),
 132         INTEL_E1000_ETHERNET_DEVICE(0x1015),
 133         INTEL_E1000_ETHERNET_DEVICE(0x1016),
 134         INTEL_E1000_ETHERNET_DEVICE(0x1017),
 135         INTEL_E1000_ETHERNET_DEVICE(0x1018),
 136         INTEL_E1000_ETHERNET_DEVICE(0x1019),
 137         INTEL_E1000_ETHERNET_DEVICE(0x101A),
 138         INTEL_E1000_ETHERNET_DEVICE(0x101D),
 139         INTEL_E1000_ETHERNET_DEVICE(0x101E),
 140         INTEL_E1000_ETHERNET_DEVICE(0x1026),
 141         INTEL_E1000_ETHERNET_DEVICE(0x1027),
 142         INTEL_E1000_ETHERNET_DEVICE(0x1028),
 143         INTEL_E1000_ETHERNET_DEVICE(0x105E),
 144         INTEL_E1000_ETHERNET_DEVICE(0x105F),
 145         INTEL_E1000_ETHERNET_DEVICE(0x1060),
 146         INTEL_E1000_ETHERNET_DEVICE(0x1075),
 147         INTEL_E1000_ETHERNET_DEVICE(0x1076),
 148         INTEL_E1000_ETHERNET_DEVICE(0x1077),
 149         INTEL_E1000_ETHERNET_DEVICE(0x1078),
 150         INTEL_E1000_ETHERNET_DEVICE(0x1079),
 151         INTEL_E1000_ETHERNET_DEVICE(0x107A),
 152         INTEL_E1000_ETHERNET_DEVICE(0x107B),
 153         INTEL_E1000_ETHERNET_DEVICE(0x107C),
 154         INTEL_E1000_ETHERNET_DEVICE(0x107D),
 155         INTEL_E1000_ETHERNET_DEVICE(0x107E),
 156         INTEL_E1000_ETHERNET_DEVICE(0x107F),
 157         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 158         INTEL_E1000_ETHERNET_DEVICE(0x108B),
 159         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 160         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 161         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 162         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 163         /* required last entry */
 164         {0,}
 165 };
 166
 167 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 168
 169 int e1000_up(struct e1000_adapter *adapter);
 170 void e1000_down(struct e1000_adapter *adapter);
 171 void e1000_reset(struct e1000_adapter *adapter);
 172 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 173 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 174 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 175 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 176 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 177 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 178                                     struct e1000_tx_ring *txdr);
 179 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 180                                     struct e1000_rx_ring *rxdr);
 181 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 182                                     struct e1000_tx_ring *tx_ring);
 183 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 184                                     struct e1000_rx_ring *rx_ring);
 185 void e1000_update_stats(struct e1000_adapter *adapter);
 186
 187 /* Local Function Prototypes */
 188
 189 static int e1000_init_module(void);
 190 static void e1000_exit_module(void);
 191 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 192 static void __devexit e1000_remove(struct pci_dev *pdev);
 193 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 194 static int e1000_sw_init(struct e1000_adapter *adapter);
 195 static int e1000_open(struct net_device *netdev);
 196 static int e1000_close(struct net_device *netdev);
 197 static void e1000_configure_tx(struct e1000_adapter *adapter);
 198 static void e1000_configure_rx(struct e1000_adapter *adapter);
 199 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 200 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 201 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 202 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 203                                 struct e1000_tx_ring *tx_ring);
 204 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 205                                 struct e1000_rx_ring *rx_ring);
 206 static void e1000_set_multi(struct net_device *netdev);
 207 static void e1000_update_phy_info(unsigned long data);
 208 static void e1000_watchdog(unsigned long data);
 209 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 210 static void e1000_82547_tx_fifo_stall(unsigned long data);
 211 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 212 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 213 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 214 static int e1000_set_mac(struct net_device *netdev, void *p);
 215 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 216 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 217                                     struct e1000_tx_ring *tx_ring);
 218 #ifdef CONFIG_E1000_NAPI
 219 static int e1000_clean(struct net_device *poll_dev, int *budget);
 220 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 221                                     struct e1000_rx_ring *rx_ring,
 222                                     int *work_done, int work_to_do);
 223 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 224                                        struct e1000_rx_ring *rx_ring,
 225                                        int *work_done, int work_to_do);
 226 #else
 227 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 228                                     struct e1000_rx_ring *rx_ring);
 229 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 230                                        struct e1000_rx_ring *rx_ring);
 231 #endif
 232 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 233                                    struct e1000_rx_ring *rx_ring,
 234                                    int cleaned_count);
 235 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 236                                       struct e1000_rx_ring *rx_ring,
 237                                       int cleaned_count);
 238 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 239 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 240                            int cmd);
 241 void e1000_set_ethtool_ops(struct net_device *netdev);
 242 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 243 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 244 static void e1000_tx_timeout(struct net_device *dev);
 245 static void e1000_tx_timeout_task(struct net_device *dev);
 246 static void e1000_smartspeed(struct e1000_adapter *adapter);
 247 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 248                                               struct sk_buff *skb);
 249
 250 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 251 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 252 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 253 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 254
 255 #ifdef CONFIG_PM
 256 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 257 static int e1000_resume(struct pci_dev *pdev);
 258 #endif
 259
 260 #ifdef CONFIG_NET_POLL_CONTROLLER
 261 /* for netdump / net console */
 262 static void e1000_netpoll (struct net_device *netdev);
 263 #endif
 264
 265
 266 /* Exported from other modules */
 267
 268 extern void e1000_check_options(struct e1000_adapter *adapter);
 269
 270 static struct pci_driver e1000_driver = {
 271         .name     = e1000_driver_name,
 272         .id_table = e1000_pci_tbl,
 273         .probe    = e1000_probe,
 274         .remove   = __devexit_p(e1000_remove),
 275         /* Power Managment Hooks */
 276 #ifdef CONFIG_PM
 277         .suspend  = e1000_suspend,
 278         .resume   = e1000_resume
 279 #endif
 280 };
 281
 282 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 283 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 284 MODULE_LICENSE("GPL");
 285 MODULE_VERSION(DRV_VERSION);
 286
 287 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 288 module_param(debug, int, 0);
 289 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 290
 291 /**
 292  * e1000_init_module - Driver Registration Routine
 293  *
 294  * e1000_init_module is the first routine called when the driver is
 295  * loaded. All it does is register with the PCI subsystem.
 296  **/
 297
 298 static int __init
 299 e1000_init_module(void)
 300 {
 301         int ret;
 302         printk(KERN_INFO "%s - version %s\n",
 303                e1000_driver_string, e1000_driver_version);
 304
 305         printk(KERN_INFO "%s\n", e1000_copyright);
 306
 307         ret = pci_module_init(&e1000_driver);
 308
 309         return ret;
 310 }
 311
 312 module_init(e1000_init_module);
 313
 314 /**
 315  * e1000_exit_module - Driver Exit Cleanup Routine
 316  *
 317  * e1000_exit_module is called just before the driver is removed
 318  * from memory.
 319  **/
 320
 321 static void __exit
 322 e1000_exit_module(void)
 323 {
 324         pci_unregister_driver(&e1000_driver);
 325 }
 326
 327 module_exit(e1000_exit_module);
 328
 329 /**
 330  * e1000_irq_disable - Mask off interrupt generation on the NIC
 331  * @adapter: board private structure
 332  **/
 333
 334 static inline void
 335 e1000_irq_disable(struct e1000_adapter *adapter)
 336 {
 337         atomic_inc(&adapter->irq_sem);
 338         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 339         E1000_WRITE_FLUSH(&adapter->hw);
 340         synchronize_irq(adapter->pdev->irq);
 341 }
 342
 343 /**
 344  * e1000_irq_enable - Enable default interrupt generation settings
 345  * @adapter: board private structure
 346  **/
 347
 348 static inline void
 349 e1000_irq_enable(struct e1000_adapter *adapter)
 350 {
 351         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 352                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 353                 E1000_WRITE_FLUSH(&adapter->hw);
 354         }
 355 }
 356
 357 static void
 358 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 359 {
 360         struct net_device *netdev = adapter->netdev;
 361         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 362         uint16_t old_vid = adapter->mng_vlan_id;
 363         if (adapter->vlgrp) {
 364                 if (!adapter->vlgrp->vlan_devices[vid]) {
 365                         if (adapter->hw.mng_cookie.status &
 366                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 367                                 e1000_vlan_rx_add_vid(netdev, vid);
 368                                 adapter->mng_vlan_id = vid;
 369                         } else
 370                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 371
 372                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 373                                         (vid != old_vid) &&
 374                                         !adapter->vlgrp->vlan_devices[old_vid])
 375                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 376                 } else
 377                         adapter->mng_vlan_id = vid;
 378         }
 379 }
 380
 381 /**
 382  * e1000_release_hw_control - release control of the h/w to f/w
 383  * @adapter: address of board private structure
 384  *
 385  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 386  * For ASF and Pass Through versions of f/w this means that the
 387  * driver is no longer loaded. For AMT version (only with 82573) i
 388  * of the f/w this means that the netowrk i/f is closed.
 389  *
 390  **/
 391
 392 static inline void
 393 e1000_release_hw_control(struct e1000_adapter *adapter)
 394 {
 395         uint32_t ctrl_ext;
 396         uint32_t swsm;
 397
 398         /* Let firmware taken over control of h/w */
 399         switch (adapter->hw.mac_type) {
 400         case e1000_82571:
 401         case e1000_82572:
 402                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 403                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 404                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 405                 break;
 406         case e1000_82573:
 407                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 408                 E1000_WRITE_REG(&adapter->hw, SWSM,
 409                                 swsm & ~E1000_SWSM_DRV_LOAD);
 410         default:
 411                 break;
 412         }
 413 }
 414
 415 /**
 416  * e1000_get_hw_control - get control of the h/w from f/w
 417  * @adapter: address of board private structure
 418  *
 419  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 420  * For ASF and Pass Through versions of f/w this means that
 421  * the driver is loaded. For AMT version (only with 82573)
 422  * of the f/w this means that the netowrk i/f is open.
 423  *
 424  **/
 425
 426 static inline void
 427 e1000_get_hw_control(struct e1000_adapter *adapter)
 428 {
 429         uint32_t ctrl_ext;
 430         uint32_t swsm;
 431         /* Let firmware know the driver has taken over */
 432         switch (adapter->hw.mac_type) {
 433         case e1000_82571:
 434         case e1000_82572:
 435                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 436                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 437                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 438                 break;
 439         case e1000_82573:
 440                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 441                 E1000_WRITE_REG(&adapter->hw, SWSM,
 442                                 swsm | E1000_SWSM_DRV_LOAD);
 443                 break;
 444         default:
 445                 break;
 446         }
 447 }
 448
 449 int
 450 e1000_up(struct e1000_adapter *adapter)
 451 {
 452         struct net_device *netdev = adapter->netdev;
 453         int i, err;
 454
 455         /* hardware has been reset, we need to reload some things */
 456
 457         /* Reset the PHY if it was previously powered down */
 458         if (adapter->hw.media_type == e1000_media_type_copper) {
 459                 uint16_t mii_reg;
 460                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 461                 if (mii_reg & MII_CR_POWER_DOWN)
 462                         e1000_phy_reset(&adapter->hw);
 463         }
 464
 465         e1000_set_multi(netdev);
 466
 467         e1000_restore_vlan(adapter);
 468
 469         e1000_configure_tx(adapter);
 470         e1000_setup_rctl(adapter);
 471         e1000_configure_rx(adapter);
 472         /* call E1000_DESC_UNUSED which always leaves
 473          * at least 1 descriptor unused to make sure
 474          * next_to_use != next_to_clean */
 475         for (i = 0; i < adapter->num_rx_queues; i++) {
 476                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 477                 adapter->alloc_rx_buf(adapter, ring,
 478                                       E1000_DESC_UNUSED(ring));
 479         }
 480
 481 #ifdef CONFIG_PCI_MSI
 482         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 483                 adapter->have_msi = TRUE;
 484                 if ((err = pci_enable_msi(adapter->pdev))) {
 485                         DPRINTK(PROBE, ERR,
 486                          "Unable to allocate MSI interrupt Error: %d\n", err);
 487                         adapter->have_msi = FALSE;
 488                 }
 489         }
 490 #endif
 491         if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
 492                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 493                               netdev->name, netdev))) {
 494                 DPRINTK(PROBE, ERR,
 495                     "Unable to allocate interrupt Error: %d\n", err);
 496                 return err;
 497         }
 498
 499         adapter->tx_queue_len = netdev->tx_queue_len;
 500
 501         mod_timer(&adapter->watchdog_timer, jiffies);
 502
 503 #ifdef CONFIG_E1000_NAPI
 504         netif_poll_enable(netdev);
 505 #endif
 506         e1000_irq_enable(adapter);
 507
 508         return 0;
 509 }
 510
 511 void
 512 e1000_down(struct e1000_adapter *adapter)
 513 {
 514         struct net_device *netdev = adapter->netdev;
 515         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 516                                      e1000_check_mng_mode(&adapter->hw);
 517
 518         e1000_irq_disable(adapter);
 519
 520         free_irq(adapter->pdev->irq, netdev);
 521 #ifdef CONFIG_PCI_MSI
 522         if (adapter->hw.mac_type > e1000_82547_rev_2 &&
 523            adapter->have_msi == TRUE)
 524                 pci_disable_msi(adapter->pdev);
 525 #endif
 526         del_timer_sync(&adapter->tx_fifo_stall_timer);
 527         del_timer_sync(&adapter->watchdog_timer);
 528         del_timer_sync(&adapter->phy_info_timer);
 529
 530 #ifdef CONFIG_E1000_NAPI
 531         netif_poll_disable(netdev);
 532 #endif
 533         netdev->tx_queue_len = adapter->tx_queue_len;
 534         adapter->link_speed = 0;
 535         adapter->link_duplex = 0;
 536         netif_carrier_off(netdev);
 537         netif_stop_queue(netdev);
 538
 539         e1000_reset(adapter);
 540         e1000_clean_all_tx_rings(adapter);
 541         e1000_clean_all_rx_rings(adapter);
 542
 543         /* Power down the PHY so no link is implied when interface is down *
 544          * The PHY cannot be powered down if any of the following is TRUE *
 545          * (a) WoL is enabled
 546          * (b) AMT is active
 547          * (c) SoL/IDER session is active */
 548         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 549            adapter->hw.media_type == e1000_media_type_copper &&
 550            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 551            !mng_mode_enabled &&
 552            !e1000_check_phy_reset_block(&adapter->hw)) {
 553                 uint16_t mii_reg;
 554                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 555                 mii_reg |= MII_CR_POWER_DOWN;
 556                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 557                 mdelay(1);
 558         }
 559 }
 560
 561 void
 562 e1000_reset(struct e1000_adapter *adapter)
 563 {
 564         uint32_t pba, manc;
 565         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 566
 567         /* Repartition Pba for greater than 9k mtu
 568          * To take effect CTRL.RST is required.
 569          */
 570
 571         switch (adapter->hw.mac_type) {
 572         case e1000_82547:
 573         case e1000_82547_rev_2:
 574                 pba = E1000_PBA_30K;
 575                 break;
 576         case e1000_82571:
 577         case e1000_82572:
 578                 pba = E1000_PBA_38K;
 579                 break;
 580         case e1000_82573:
 581                 pba = E1000_PBA_12K;
 582                 break;
 583         default:
 584                 pba = E1000_PBA_48K;
 585                 break;
 586         }
 587
 588         if ((adapter->hw.mac_type != e1000_82573) &&
 589            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 590                 pba -= 8; /* allocate more FIFO for Tx */
 591
 592
 593         if (adapter->hw.mac_type == e1000_82547) {
 594                 adapter->tx_fifo_head = 0;
 595                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 596                 adapter->tx_fifo_size =
 597                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 598                 atomic_set(&adapter->tx_fifo_stall, 0);
 599         }
 600
 601         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 602
 603         /* flow control settings */
 604         /* Set the FC high water mark to 90% of the FIFO size.
 605          * Required to clear last 3 LSB */
 606         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 607
 608         adapter->hw.fc_high_water = fc_high_water_mark;
 609         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 610         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 611         adapter->hw.fc_send_xon = 1;
 612         adapter->hw.fc = adapter->hw.original_fc;
 613
 614         /* Allow time for pending master requests to run */
 615         e1000_reset_hw(&adapter->hw);
 616         if (adapter->hw.mac_type >= e1000_82544)
 617                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 618         if (e1000_init_hw(&adapter->hw))
 619                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 620         e1000_update_mng_vlan(adapter);
 621         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 622         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 623
 624         e1000_reset_adaptive(&adapter->hw);
 625         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 626         if (adapter->en_mng_pt) {
 627                 manc = E1000_READ_REG(&adapter->hw, MANC);
 628                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 629                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 630         }
 631 }
 632
 633 /**
 634  * e1000_probe - Device Initialization Routine
 635  * @pdev: PCI device information struct
 636  * @ent: entry in e1000_pci_tbl
 637  *
 638  * Returns 0 on success, negative on failure
 639  *
 640  * e1000_probe initializes an adapter identified by a pci_dev structure.
 641  * The OS initialization, configuring of the adapter private structure,
 642  * and a hardware reset occur.
 643  **/
 644
 645 static int __devinit
 646 e1000_probe(struct pci_dev *pdev,
 647             const struct pci_device_id *ent)
 648 {
 649         struct net_device *netdev;
 650         struct e1000_adapter *adapter;
 651         unsigned long mmio_start, mmio_len;
 652
 653         static int cards_found = 0;
 654         static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
 655         int i, err, pci_using_dac;
 656         uint16_t eeprom_data;
 657         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 658         if ((err = pci_enable_device(pdev)))
 659                 return err;
 660
 661         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 662                 pci_using_dac = 1;
 663         } else {
 664                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 665                         E1000_ERR("No usable DMA configuration, aborting\n");
 666                         return err;
 667                 }
 668                 pci_using_dac = 0;
 669         }
 670
 671         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 672                 return err;
 673
 674         pci_set_master(pdev);
 675
 676         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 677         if (!netdev) {
 678                 err = -ENOMEM;
 679                 goto err_alloc_etherdev;
 680         }
 681
 682         SET_MODULE_OWNER(netdev);
 683         SET_NETDEV_DEV(netdev, &pdev->dev);
 684
 685         pci_set_drvdata(pdev, netdev);
 686         adapter = netdev_priv(netdev);
 687         adapter->netdev = netdev;
 688         adapter->pdev = pdev;
 689         adapter->hw.back = adapter;
 690         adapter->msg_enable = (1 << debug) - 1;
 691
 692         mmio_start = pci_resource_start(pdev, BAR_0);
 693         mmio_len = pci_resource_len(pdev, BAR_0);
 694
 695         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 696         if (!adapter->hw.hw_addr) {
 697                 err = -EIO;
 698                 goto err_ioremap;
 699         }
 700
 701         for (i = BAR_1; i <= BAR_5; i++) {
 702                 if (pci_resource_len(pdev, i) == 0)
 703                         continue;
 704                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 705                         adapter->hw.io_base = pci_resource_start(pdev, i);
 706                         break;
 707                 }
 708         }
 709
 710         netdev->open = &e1000_open;
 711         netdev->stop = &e1000_close;
 712         netdev->hard_start_xmit = &e1000_xmit_frame;
 713         netdev->get_stats = &e1000_get_stats;
 714         netdev->set_multicast_list = &e1000_set_multi;
 715         netdev->set_mac_address = &e1000_set_mac;
 716         netdev->change_mtu = &e1000_change_mtu;
 717         netdev->do_ioctl = &e1000_ioctl;
 718         e1000_set_ethtool_ops(netdev);
 719         netdev->tx_timeout = &e1000_tx_timeout;
 720         netdev->watchdog_timeo = 5 * HZ;
 721 #ifdef CONFIG_E1000_NAPI
 722         netdev->poll = &e1000_clean;
 723         netdev->weight = 64;
 724 #endif
 725         netdev->vlan_rx_register = e1000_vlan_rx_register;
 726         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 727         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 728 #ifdef CONFIG_NET_POLL_CONTROLLER
 729         netdev->poll_controller = e1000_netpoll;
 730 #endif
 731         strcpy(netdev->name, pci_name(pdev));
 732
 733         netdev->mem_start = mmio_start;
 734         netdev->mem_end = mmio_start + mmio_len;
 735         netdev->base_addr = adapter->hw.io_base;
 736
 737         adapter->bd_number = cards_found;
 738
 739         /* setup the private structure */
 740
 741         if ((err = e1000_sw_init(adapter)))
 742                 goto err_sw_init;
 743
 744         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 745                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 746
 747         /* if ksp3, indicate if it's port a being setup */
 748         if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
 749                         e1000_ksp3_port_a == 0)
 750                 adapter->ksp3_port_a = 1;
 751         e1000_ksp3_port_a++;
 752         /* Reset for multiple KP3 adapters */
 753         if (e1000_ksp3_port_a == 4)
 754                 e1000_ksp3_port_a = 0;
 755
 756         if (adapter->hw.mac_type >= e1000_82543) {
 757                 netdev->features = NETIF_F_SG |
 758                                    NETIF_F_HW_CSUM |
 759                                    NETIF_F_HW_VLAN_TX |
 760                                    NETIF_F_HW_VLAN_RX |
 761                                    NETIF_F_HW_VLAN_FILTER;
 762         }
 763
 764 #ifdef NETIF_F_TSO
 765         if ((adapter->hw.mac_type >= e1000_82544) &&
 766            (adapter->hw.mac_type != e1000_82547))
 767                 netdev->features |= NETIF_F_TSO;
 768
 769 #ifdef NETIF_F_TSO_IPV6
 770         if (adapter->hw.mac_type > e1000_82547_rev_2)
 771                 netdev->features |= NETIF_F_TSO_IPV6;
 772 #endif
 773 #endif
 774         if (pci_using_dac)
 775                 netdev->features |= NETIF_F_HIGHDMA;
 776
 777         /* hard_start_xmit is safe against parallel locking */
 778         netdev->features |= NETIF_F_LLTX;
 779
 780         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 781
 782         /* before reading the EEPROM, reset the controller to
 783          * put the device in a known good starting state */
 784
 785         e1000_reset_hw(&adapter->hw);
 786
 787         /* make sure the EEPROM is good */
 788
 789         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 790                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 791                 err = -EIO;
 792                 goto err_eeprom;
 793         }
 794
 795         /* copy the MAC address out of the EEPROM */
 796
 797         if (e1000_read_mac_addr(&adapter->hw))
 798                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 799         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 800         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 801
 802         if (!is_valid_ether_addr(netdev->perm_addr)) {
 803                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 804                 err = -EIO;
 805                 goto err_eeprom;
 806         }
 807
 808         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 809
 810         e1000_get_bus_info(&adapter->hw);
 811
 812         init_timer(&adapter->tx_fifo_stall_timer);
 813         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 814         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 815
 816         init_timer(&adapter->watchdog_timer);
 817         adapter->watchdog_timer.function = &e1000_watchdog;
 818         adapter->watchdog_timer.data = (unsigned long) adapter;
 819
 820         INIT_WORK(&adapter->watchdog_task,
 821                 (void (*)(void *))e1000_watchdog_task, adapter);
 822
 823         init_timer(&adapter->phy_info_timer);
 824         adapter->phy_info_timer.function = &e1000_update_phy_info;
 825         adapter->phy_info_timer.data = (unsigned long) adapter;
 826
 827         INIT_WORK(&adapter->tx_timeout_task,
 828                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 829
 830         /* we're going to reset, so assume we have no link for now */
 831
 832         netif_carrier_off(netdev);
 833         netif_stop_queue(netdev);
 834
 835         e1000_check_options(adapter);
 836
 837         /* Initial Wake on LAN setting
 838          * If APM wake is enabled in the EEPROM,
 839          * enable the ACPI Magic Packet filter
 840          */
 841
 842         switch (adapter->hw.mac_type) {
 843         case e1000_82542_rev2_0:
 844         case e1000_82542_rev2_1:
 845         case e1000_82543:
 846                 break;
 847         case e1000_82544:
 848                 e1000_read_eeprom(&adapter->hw,
 849                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 850                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 851                 break;
 852         case e1000_82546:
 853         case e1000_82546_rev_3:
 854         case e1000_82571:
 855                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 856                         e1000_read_eeprom(&adapter->hw,
 857                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 858                         break;
 859                 }
 860                 /* Fall Through */
 861         default:
 862                 e1000_read_eeprom(&adapter->hw,
 863                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 864                 break;
 865         }
 866         if (eeprom_data & eeprom_apme_mask)
 867                 adapter->wol |= E1000_WUFC_MAG;
 868
 869         /* print bus type/speed/width info */
 870         {
 871         struct e1000_hw *hw = &adapter->hw;
 872         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 873                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 874                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 875                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 876                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 877                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 878                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 879                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 880                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 881                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 882                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 883                  "32-bit"));
 884         }
 885
 886         for (i = 0; i < 6; i++)
 887                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 888
 889         /* reset the hardware with the new settings */
 890         e1000_reset(adapter);
 891
 892         /* If the controller is 82573 and f/w is AMT, do not set
 893          * DRV_LOAD until the interface is up.  For all other cases,
 894          * let the f/w know that the h/w is now under the control
 895          * of the driver. */
 896         if (adapter->hw.mac_type != e1000_82573 ||
 897             !e1000_check_mng_mode(&adapter->hw))
 898                 e1000_get_hw_control(adapter);
 899
 900         strcpy(netdev->name, "eth%d");
 901         if ((err = register_netdev(netdev)))
 902                 goto err_register;
 903
 904         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 905
 906         cards_found++;
 907         return 0;
 908
 909 err_register:
 910 err_sw_init:
 911 err_eeprom:
 912         iounmap(adapter->hw.hw_addr);
 913 err_ioremap:
 914         free_netdev(netdev);
 915 err_alloc_etherdev:
 916         pci_release_regions(pdev);
 917         return err;
 918 }
 919
 920 /**
 921  * e1000_remove - Device Removal Routine
 922  * @pdev: PCI device information struct
 923  *
 924  * e1000_remove is called by the PCI subsystem to alert the driver
 925  * that it should release a PCI device.  The could be caused by a
 926  * Hot-Plug event, or because the driver is going to be removed from
 927  * memory.
 928  **/
 929
 930 static void __devexit
 931 e1000_remove(struct pci_dev *pdev)
 932 {
 933         struct net_device *netdev = pci_get_drvdata(pdev);
 934         struct e1000_adapter *adapter = netdev_priv(netdev);
 935         uint32_t manc;
 936 #ifdef CONFIG_E1000_NAPI
 937         int i;
 938 #endif
 939
 940         flush_scheduled_work();
 941
 942         if (adapter->hw.mac_type >= e1000_82540 &&
 943            adapter->hw.media_type == e1000_media_type_copper) {
 944                 manc = E1000_READ_REG(&adapter->hw, MANC);
 945                 if (manc & E1000_MANC_SMBUS_EN) {
 946                         manc |= E1000_MANC_ARP_EN;
 947                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 948                 }
 949         }
 950
 951         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 952          * would have already happened in close and is redundant. */
 953         e1000_release_hw_control(adapter);
 954
 955         unregister_netdev(netdev);
 956 #ifdef CONFIG_E1000_NAPI
 957         for (i = 0; i < adapter->num_rx_queues; i++)
 958                 __dev_put(&adapter->polling_netdev[i]);
 959 #endif
 960
 961         if (!e1000_check_phy_reset_block(&adapter->hw))
 962                 e1000_phy_hw_reset(&adapter->hw);
 963
 964         kfree(adapter->tx_ring);
 965         kfree(adapter->rx_ring);
 966 #ifdef CONFIG_E1000_NAPI
 967         kfree(adapter->polling_netdev);
 968 #endif
 969
 970         iounmap(adapter->hw.hw_addr);
 971         pci_release_regions(pdev);
 972
 973         free_netdev(netdev);
 974
 975         pci_disable_device(pdev);
 976 }
 977
 978 /**
 979  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 980  * @adapter: board private structure to initialize
 981  *
 982  * e1000_sw_init initializes the Adapter private data structure.
 983  * Fields are initialized based on PCI device information and
 984  * OS network device settings (MTU size).
 985  **/
 986
 987 static int __devinit
 988 e1000_sw_init(struct e1000_adapter *adapter)
 989 {
 990         struct e1000_hw *hw = &adapter->hw;
 991         struct net_device *netdev = adapter->netdev;
 992         struct pci_dev *pdev = adapter->pdev;
 993 #ifdef CONFIG_E1000_NAPI
 994         int i;
 995 #endif
 996
 997         /* PCI config space info */
 998
 999         hw->vendor_id = pdev->vendor;
1000         hw->device_id = pdev->device;
1001         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1002         hw->subsystem_id = pdev->subsystem_device;
1003
1004         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1005
1006         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1007
1008         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
1009         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
1010         hw->max_frame_size = netdev->mtu +
1011                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1012         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1013
1014         /* identify the MAC */
1015
1016         if (e1000_set_mac_type(hw)) {
1017                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1018                 return -EIO;
1019         }
1020
1021         /* initialize eeprom parameters */
1022
1023         if (e1000_init_eeprom_params(hw)) {
1024                 E1000_ERR("EEPROM initialization failed\n");
1025                 return -EIO;
1026         }
1027
1028         switch (hw->mac_type) {
1029         default:
1030                 break;
1031         case e1000_82541:
1032         case e1000_82547:
1033         case e1000_82541_rev_2:
1034         case e1000_82547_rev_2:
1035                 hw->phy_init_script = 1;
1036                 break;
1037         }
1038
1039         e1000_set_media_type(hw);
1040
1041         hw->wait_autoneg_complete = FALSE;
1042         hw->tbi_compatibility_en = TRUE;
1043         hw->adaptive_ifs = TRUE;
1044
1045         /* Copper options */
1046
1047         if (hw->media_type == e1000_media_type_copper) {
1048                 hw->mdix = AUTO_ALL_MODES;
1049                 hw->disable_polarity_correction = FALSE;
1050                 hw->master_slave = E1000_MASTER_SLAVE;
1051         }
1052
1053         adapter->num_tx_queues = 1;
1054         adapter->num_rx_queues = 1;
1055
1056         if (e1000_alloc_queues(adapter)) {
1057                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1058                 return -ENOMEM;
1059         }
1060
1061 #ifdef CONFIG_E1000_NAPI
1062         for (i = 0; i < adapter->num_rx_queues; i++) {
1063                 adapter->polling_netdev[i].priv = adapter;
1064                 adapter->polling_netdev[i].poll = &e1000_clean;
1065                 adapter->polling_netdev[i].weight = 64;
1066                 dev_hold(&adapter->polling_netdev[i]);
1067                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1068         }
1069         spin_lock_init(&adapter->tx_queue_lock);
1070 #endif
1071
1072         atomic_set(&adapter->irq_sem, 1);
1073         spin_lock_init(&adapter->stats_lock);
1074
1075         return 0;
1076 }
1077
1078 /**
1079  * e1000_alloc_queues - Allocate memory for all rings
1080  * @adapter: board private structure to initialize
1081  *
1082  * We allocate one ring per queue at run-time since we don't know the
1083  * number of queues at compile-time.  The polling_netdev array is
1084  * intended for Multiqueue, but should work fine with a single queue.
1085  **/
1086
1087 static int __devinit
1088 e1000_alloc_queues(struct e1000_adapter *adapter)
1089 {
1090         int size;
1091
1092         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1093         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1094         if (!adapter->tx_ring)
1095                 return -ENOMEM;
1096         memset(adapter->tx_ring, 0, size);
1097
1098         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1099         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1100         if (!adapter->rx_ring) {
1101                 kfree(adapter->tx_ring);
1102                 return -ENOMEM;
1103         }
1104         memset(adapter->rx_ring, 0, size);
1105
1106 #ifdef CONFIG_E1000_NAPI
1107         size = sizeof(struct net_device) * adapter->num_rx_queues;
1108         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1109         if (!adapter->polling_netdev) {
1110                 kfree(adapter->tx_ring);
1111                 kfree(adapter->rx_ring);
1112                 return -ENOMEM;
1113         }
1114         memset(adapter->polling_netdev, 0, size);
1115 #endif
1116
1117         return E1000_SUCCESS;
1118 }
1119
1120 /**
1121  * e1000_open - Called when a network interface is made active
1122  * @netdev: network interface device structure
1123  *
1124  * Returns 0 on success, negative value on failure
1125  *
1126  * The open entry point is called when a network interface is made
1127  * active by the system (IFF_UP).  At this point all resources needed
1128  * for transmit and receive operations are allocated, the interrupt
1129  * handler is registered with the OS, the watchdog timer is started,
1130  * and the stack is notified that the interface is ready.
1131  **/
1132
1133 static int
1134 e1000_open(struct net_device *netdev)
1135 {
1136         struct e1000_adapter *adapter = netdev_priv(netdev);
1137         int err;
1138
1139         /* allocate transmit descriptors */
1140
1141         if ((err = e1000_setup_all_tx_resources(adapter)))
1142                 goto err_setup_tx;
1143
1144         /* allocate receive descriptors */
1145
1146         if ((err = e1000_setup_all_rx_resources(adapter)))
1147                 goto err_setup_rx;
1148
1149         if ((err = e1000_up(adapter)))
1150                 goto err_up;
1151         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1152         if ((adapter->hw.mng_cookie.status &
1153                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1154                 e1000_update_mng_vlan(adapter);
1155         }
1156
1157         /* If AMT is enabled, let the firmware know that the network
1158          * interface is now open */
1159         if (adapter->hw.mac_type == e1000_82573 &&
1160             e1000_check_mng_mode(&adapter->hw))
1161                 e1000_get_hw_control(adapter);
1162
1163         return E1000_SUCCESS;
1164
1165 err_up:
1166         e1000_free_all_rx_resources(adapter);
1167 err_setup_rx:
1168         e1000_free_all_tx_resources(adapter);
1169 err_setup_tx:
1170         e1000_reset(adapter);
1171
1172         return err;
1173 }
1174
1175 /**
1176  * e1000_close - Disables a network interface
1177  * @netdev: network interface device structure
1178  *
1179  * Returns 0, this is not allowed to fail
1180  *
1181  * The close entry point is called when an interface is de-activated
1182  * by the OS.  The hardware is still under the drivers control, but
1183  * needs to be disabled.  A global MAC reset is issued to stop the
1184  * hardware, and all transmit and receive resources are freed.
1185  **/
1186
1187 static int
1188 e1000_close(struct net_device *netdev)
1189 {
1190         struct e1000_adapter *adapter = netdev_priv(netdev);
1191
1192         e1000_down(adapter);
1193
1194         e1000_free_all_tx_resources(adapter);
1195         e1000_free_all_rx_resources(adapter);
1196
1197         if ((adapter->hw.mng_cookie.status &
1198                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1199                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1200         }
1201
1202         /* If AMT is enabled, let the firmware know that the network
1203          * interface is now closed */
1204         if (adapter->hw.mac_type == e1000_82573 &&
1205             e1000_check_mng_mode(&adapter->hw))
1206                 e1000_release_hw_control(adapter);
1207
1208         return 0;
1209 }
1210
1211 /**
1212  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1213  * @adapter: address of board private structure
1214  * @start: address of beginning of memory
1215  * @len: length of memory
1216  **/
1217 static inline boolean_t
1218 e1000_check_64k_bound(struct e1000_adapter *adapter,
1219                       void *start, unsigned long len)
1220 {
1221         unsigned long begin = (unsigned long) start;
1222         unsigned long end = begin + len;
1223
1224         /* First rev 82545 and 82546 need to not allow any memory
1225          * write location to cross 64k boundary due to errata 23 */
1226         if (adapter->hw.mac_type == e1000_82545 ||
1227             adapter->hw.mac_type == e1000_82546) {
1228                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1229         }
1230
1231         return TRUE;
1232 }
1233
1234 /**
1235  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1236  * @adapter: board private structure
1237  * @txdr:    tx descriptor ring (for a specific queue) to setup
1238  *
1239  * Return 0 on success, negative on failure
1240  **/
1241
1242 static int
1243 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1244                          struct e1000_tx_ring *txdr)
1245 {
1246         struct pci_dev *pdev = adapter->pdev;
1247         int size;
1248
1249         size = sizeof(struct e1000_buffer) * txdr->count;
1250
1251         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1252         if (!txdr->buffer_info) {
1253                 DPRINTK(PROBE, ERR,
1254                 "Unable to allocate memory for the transmit descriptor ring\n");
1255                 return -ENOMEM;
1256         }
1257         memset(txdr->buffer_info, 0, size);
1258
1259         /* round up to nearest 4K */
1260
1261         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1262         E1000_ROUNDUP(txdr->size, 4096);
1263
1264         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1265         if (!txdr->desc) {
1266 setup_tx_desc_die:
1267                 vfree(txdr->buffer_info);
1268                 DPRINTK(PROBE, ERR,
1269                 "Unable to allocate memory for the transmit descriptor ring\n");
1270                 return -ENOMEM;
1271         }
1272
1273         /* Fix for errata 23, can't cross 64kB boundary */
1274         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1275                 void *olddesc = txdr->desc;
1276                 dma_addr_t olddma = txdr->dma;
1277                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1278                                      "at %p\n", txdr->size, txdr->desc);
1279                 /* Try again, without freeing the previous */
1280                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1281                 /* Failed allocation, critical failure */
1282                 if (!txdr->desc) {
1283                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1284                         goto setup_tx_desc_die;
1285                 }
1286
1287                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1288                         /* give up */
1289                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1290                                             txdr->dma);
1291                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1292                         DPRINTK(PROBE, ERR,
1293                                 "Unable to allocate aligned memory "
1294                                 "for the transmit descriptor ring\n");
1295                         vfree(txdr->buffer_info);
1296                         return -ENOMEM;
1297                 } else {
1298                         /* Free old allocation, new allocation was successful */
1299                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1300                 }
1301         }
1302         memset(txdr->desc, 0, txdr->size);
1303
1304         txdr->next_to_use = 0;
1305         txdr->next_to_clean = 0;
1306         spin_lock_init(&txdr->tx_lock);
1307
1308         return 0;
1309 }
1310
1311 /**
1312  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1313  *                                (Descriptors) for all queues
1314  * @adapter: board private structure
1315  *
1316  * If this function returns with an error, then it's possible one or
1317  * more of the rings is populated (while the rest are not).  It is the
1318  * callers duty to clean those orphaned rings.
1319  *
1320  * Return 0 on success, negative on failure
1321  **/
1322
1323 int
1324 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1325 {
1326         int i, err = 0;
1327
1328         for (i = 0; i < adapter->num_tx_queues; i++) {
1329                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1330                 if (err) {
1331                         DPRINTK(PROBE, ERR,
1332                                 "Allocation for Tx Queue %u failed\n", i);
1333                         break;
1334                 }
1335         }
1336
1337         return err;
1338 }
1339
1340 /**
1341  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1342  * @adapter: board private structure
1343  *
1344  * Configure the Tx unit of the MAC after a reset.
1345  **/
1346
1347 static void
1348 e1000_configure_tx(struct e1000_adapter *adapter)
1349 {
1350         uint64_t tdba;
1351         struct e1000_hw *hw = &adapter->hw;
1352         uint32_t tdlen, tctl, tipg, tarc;
1353         uint32_t ipgr1, ipgr2;
1354
1355         /* Setup the HW Tx Head and Tail descriptor pointers */
1356
1357         switch (adapter->num_tx_queues) {
1358         case 1:
1359         default:
1360                 tdba = adapter->tx_ring[0].dma;
1361                 tdlen = adapter->tx_ring[0].count *
1362                         sizeof(struct e1000_tx_desc);
1363                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1364                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1365                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1366                 E1000_WRITE_REG(hw, TDH, 0);
1367                 E1000_WRITE_REG(hw, TDT, 0);
1368                 adapter->tx_ring[0].tdh = E1000_TDH;
1369                 adapter->tx_ring[0].tdt = E1000_TDT;
1370                 break;
1371         }
1372
1373         /* Set the default values for the Tx Inter Packet Gap timer */
1374
1375         if (hw->media_type == e1000_media_type_fiber ||
1376             hw->media_type == e1000_media_type_internal_serdes)
1377                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1378         else
1379                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1380
1381         switch (hw->mac_type) {
1382         case e1000_82542_rev2_0:
1383         case e1000_82542_rev2_1:
1384                 tipg = DEFAULT_82542_TIPG_IPGT;
1385                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1386                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1387                 break;
1388         default:
1389                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1390                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1391                 break;
1392         }
1393         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1394         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1395         E1000_WRITE_REG(hw, TIPG, tipg);
1396
1397         /* Set the Tx Interrupt Delay register */
1398
1399         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1400         if (hw->mac_type >= e1000_82540)
1401                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1402
1403         /* Program the Transmit Control Register */
1404
1405         tctl = E1000_READ_REG(hw, TCTL);
1406
1407         tctl &= ~E1000_TCTL_CT;
1408         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1409                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1410
1411 #ifdef DISABLE_MULR
1412         /* disable Multiple Reads for debugging */
1413         tctl &= ~E1000_TCTL_MULR;
1414 #endif
1415
1416         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1417                 tarc = E1000_READ_REG(hw, TARC0);
1418                 tarc |= ((1 << 25) | (1 << 21));
1419                 E1000_WRITE_REG(hw, TARC0, tarc);
1420                 tarc = E1000_READ_REG(hw, TARC1);
1421                 tarc |= (1 << 25);
1422                 if (tctl & E1000_TCTL_MULR)
1423                         tarc &= ~(1 << 28);
1424                 else
1425                         tarc |= (1 << 28);
1426                 E1000_WRITE_REG(hw, TARC1, tarc);
1427         }
1428
1429         e1000_config_collision_dist(hw);
1430
1431         /* Setup Transmit Descriptor Settings for eop descriptor */
1432         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1433                 E1000_TXD_CMD_IFCS;
1434
1435         if (hw->mac_type < e1000_82543)
1436                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1437         else
1438                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1439
1440         /* Cache if we're 82544 running in PCI-X because we'll
1441          * need this to apply a workaround later in the send path. */
1442         if (hw->mac_type == e1000_82544 &&
1443             hw->bus_type == e1000_bus_type_pcix)
1444                 adapter->pcix_82544 = 1;
1445
1446         E1000_WRITE_REG(hw, TCTL, tctl);
1447
1448 }
1449
1450 /**
1451  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1452  * @adapter: board private structure
1453  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1454  *
1455  * Returns 0 on success, negative on failure
1456  **/
1457
1458 static int
1459 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1460                          struct e1000_rx_ring *rxdr)
1461 {
1462         struct pci_dev *pdev = adapter->pdev;
1463         int size, desc_len;
1464
1465         size = sizeof(struct e1000_buffer) * rxdr->count;
1466         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1467         if (!rxdr->buffer_info) {
1468                 DPRINTK(PROBE, ERR,
1469                 "Unable to allocate memory for the receive descriptor ring\n");
1470                 return -ENOMEM;
1471         }
1472         memset(rxdr->buffer_info, 0, size);
1473
1474         size = sizeof(struct e1000_ps_page) * rxdr->count;
1475         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1476         if (!rxdr->ps_page) {
1477                 vfree(rxdr->buffer_info);
1478                 DPRINTK(PROBE, ERR,
1479                 "Unable to allocate memory for the receive descriptor ring\n");
1480                 return -ENOMEM;
1481         }
1482         memset(rxdr->ps_page, 0, size);
1483
1484         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1485         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1486         if (!rxdr->ps_page_dma) {
1487                 vfree(rxdr->buffer_info);
1488                 kfree(rxdr->ps_page);
1489                 DPRINTK(PROBE, ERR,
1490                 "Unable to allocate memory for the receive descriptor ring\n");
1491                 return -ENOMEM;
1492         }
1493         memset(rxdr->ps_page_dma, 0, size);
1494
1495         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1496                 desc_len = sizeof(struct e1000_rx_desc);
1497         else
1498                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1499
1500         /* Round up to nearest 4K */
1501
1502         rxdr->size = rxdr->count * desc_len;
1503         E1000_ROUNDUP(rxdr->size, 4096);
1504
1505         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1506
1507         if (!rxdr->desc) {
1508                 DPRINTK(PROBE, ERR,
1509                 "Unable to allocate memory for the receive descriptor ring\n");
1510 setup_rx_desc_die:
1511                 vfree(rxdr->buffer_info);
1512                 kfree(rxdr->ps_page);
1513                 kfree(rxdr->ps_page_dma);
1514                 return -ENOMEM;
1515         }
1516
1517         /* Fix for errata 23, can't cross 64kB boundary */
1518         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1519                 void *olddesc = rxdr->desc;
1520                 dma_addr_t olddma = rxdr->dma;
1521                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1522                                      "at %p\n", rxdr->size, rxdr->desc);
1523                 /* Try again, without freeing the previous */
1524                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1525                 /* Failed allocation, critical failure */
1526                 if (!rxdr->desc) {
1527                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1528                         DPRINTK(PROBE, ERR,
1529                                 "Unable to allocate memory "
1530                                 "for the receive descriptor ring\n");
1531                         goto setup_rx_desc_die;
1532                 }
1533
1534                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1535                         /* give up */
1536                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1537                                             rxdr->dma);
1538                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1539                         DPRINTK(PROBE, ERR,
1540                                 "Unable to allocate aligned memory "
1541                                 "for the receive descriptor ring\n");
1542                         goto setup_rx_desc_die;
1543                 } else {
1544                         /* Free old allocation, new allocation was successful */
1545                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1546                 }
1547         }
1548         memset(rxdr->desc, 0, rxdr->size);
1549
1550         rxdr->next_to_clean = 0;
1551         rxdr->next_to_use = 0;
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 #ifndef CONFIG_E1000_DISABLE_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 #ifndef CONFIG_E1000_DISABLE_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
1708         if (adapter->rx_ps_pages) {
1709                 rdlen = adapter->rx_ring[0].count *
1710                         sizeof(union e1000_rx_desc_packet_split);
1711                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1712                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1713         } else {
1714                 rdlen = adapter->rx_ring[0].count *
1715                         sizeof(struct e1000_rx_desc);
1716                 adapter->clean_rx = e1000_clean_rx_irq;
1717                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1718         }
1719
1720         /* disable receives while setting up the descriptors */
1721         rctl = E1000_READ_REG(hw, RCTL);
1722         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1723
1724         /* set the Receive Delay Timer Register */
1725         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1726
1727         if (hw->mac_type >= e1000_82540) {
1728                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1729                 if (adapter->itr > 1)
1730                         E1000_WRITE_REG(hw, ITR,
1731                                 1000000000 / (adapter->itr * 256));
1732         }
1733
1734         if (hw->mac_type >= e1000_82571) {
1735                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1736                 /* Reset delay timers after every interrupt */
1737                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1738 #ifdef CONFIG_E1000_NAPI
1739                 /* Auto-Mask interrupts upon ICR read. */
1740                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1741 #endif
1742                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1743                 E1000_WRITE_REG(hw, IAM, ~0);
1744                 E1000_WRITE_FLUSH(hw);
1745         }
1746
1747         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1748          * the Base and Length of the Rx Descriptor Ring */
1749         switch (adapter->num_rx_queues) {
1750         case 1:
1751         default:
1752                 rdba = adapter->rx_ring[0].dma;
1753                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1754                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1755                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1756                 E1000_WRITE_REG(hw, RDH, 0);
1757                 E1000_WRITE_REG(hw, RDT, 0);
1758                 adapter->rx_ring[0].rdh = E1000_RDH;
1759                 adapter->rx_ring[0].rdt = E1000_RDT;
1760                 break;
1761         }
1762
1763         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1764         if (hw->mac_type >= e1000_82543) {
1765                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1766                 if (adapter->rx_csum == TRUE) {
1767                         rxcsum |= E1000_RXCSUM_TUOFL;
1768
1769                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1770                          * Must be used in conjunction with packet-split. */
1771                         if ((hw->mac_type >= e1000_82571) &&
1772                             (adapter->rx_ps_pages)) {
1773                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1774                         }
1775                 } else {
1776                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1777                         /* don't need to clear IPPCSE as it defaults to 0 */
1778                 }
1779                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1780         }
1781
1782         if (hw->mac_type == e1000_82573)
1783                 E1000_WRITE_REG(hw, ERT, 0x0100);
1784
1785         /* Enable Receives */
1786         E1000_WRITE_REG(hw, RCTL, rctl);
1787 }
1788
1789 /**
1790  * e1000_free_tx_resources - Free Tx Resources per Queue
1791  * @adapter: board private structure
1792  * @tx_ring: Tx descriptor ring for a specific queue
1793  *
1794  * Free all transmit software resources
1795  **/
1796
1797 static void
1798 e1000_free_tx_resources(struct e1000_adapter *adapter,
1799                         struct e1000_tx_ring *tx_ring)
1800 {
1801         struct pci_dev *pdev = adapter->pdev;
1802
1803         e1000_clean_tx_ring(adapter, tx_ring);
1804
1805         vfree(tx_ring->buffer_info);
1806         tx_ring->buffer_info = NULL;
1807
1808         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1809
1810         tx_ring->desc = NULL;
1811 }
1812
1813 /**
1814  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1815  * @adapter: board private structure
1816  *
1817  * Free all transmit software resources
1818  **/
1819
1820 void
1821 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1822 {
1823         int i;
1824
1825         for (i = 0; i < adapter->num_tx_queues; i++)
1826                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1827 }
1828
1829 static inline void
1830 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1831                         struct e1000_buffer *buffer_info)
1832 {
1833         if (buffer_info->dma) {
1834                 pci_unmap_page(adapter->pdev,
1835                                 buffer_info->dma,
1836                                 buffer_info->length,
1837                                 PCI_DMA_TODEVICE);
1838         }
1839         if (buffer_info->skb)
1840                 dev_kfree_skb_any(buffer_info->skb);
1841         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1842 }
1843
1844 /**
1845  * e1000_clean_tx_ring - Free Tx Buffers
1846  * @adapter: board private structure
1847  * @tx_ring: ring to be cleaned
1848  **/
1849
1850 static void
1851 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1852                     struct e1000_tx_ring *tx_ring)
1853 {
1854         struct e1000_buffer *buffer_info;
1855         unsigned long size;
1856         unsigned int i;
1857
1858         /* Free all the Tx ring sk_buffs */
1859
1860         for (i = 0; i < tx_ring->count; i++) {
1861                 buffer_info = &tx_ring->buffer_info[i];
1862                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1863         }
1864
1865         size = sizeof(struct e1000_buffer) * tx_ring->count;
1866         memset(tx_ring->buffer_info, 0, size);
1867
1868         /* Zero out the descriptor ring */
1869
1870         memset(tx_ring->desc, 0, tx_ring->size);
1871
1872         tx_ring->next_to_use = 0;
1873         tx_ring->next_to_clean = 0;
1874         tx_ring->last_tx_tso = 0;
1875
1876         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1877         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1878 }
1879
1880 /**
1881  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1882  * @adapter: board private structure
1883  **/
1884
1885 static void
1886 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1887 {
1888         int i;
1889
1890         for (i = 0; i < adapter->num_tx_queues; i++)
1891                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1892 }
1893
1894 /**
1895  * e1000_free_rx_resources - Free Rx Resources
1896  * @adapter: board private structure
1897  * @rx_ring: ring to clean the resources from
1898  *
1899  * Free all receive software resources
1900  **/
1901
1902 static void
1903 e1000_free_rx_resources(struct e1000_adapter *adapter,
1904                         struct e1000_rx_ring *rx_ring)
1905 {
1906         struct pci_dev *pdev = adapter->pdev;
1907
1908         e1000_clean_rx_ring(adapter, rx_ring);
1909
1910         vfree(rx_ring->buffer_info);
1911         rx_ring->buffer_info = NULL;
1912         kfree(rx_ring->ps_page);
1913         rx_ring->ps_page = NULL;
1914         kfree(rx_ring->ps_page_dma);
1915         rx_ring->ps_page_dma = NULL;
1916
1917         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1918
1919         rx_ring->desc = NULL;
1920 }
1921
1922 /**
1923  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1924  * @adapter: board private structure
1925  *
1926  * Free all receive software resources
1927  **/
1928
1929 void
1930 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1931 {
1932         int i;
1933
1934         for (i = 0; i < adapter->num_rx_queues; i++)
1935                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1936 }
1937
1938 /**
1939  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1940  * @adapter: board private structure
1941  * @rx_ring: ring to free buffers from
1942  **/
1943
1944 static void
1945 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1946                     struct e1000_rx_ring *rx_ring)
1947 {
1948         struct e1000_buffer *buffer_info;
1949         struct e1000_ps_page *ps_page;
1950         struct e1000_ps_page_dma *ps_page_dma;
1951         struct pci_dev *pdev = adapter->pdev;
1952         unsigned long size;
1953         unsigned int i, j;
1954
1955         /* Free all the Rx ring sk_buffs */
1956         for (i = 0; i < rx_ring->count; i++) {
1957                 buffer_info = &rx_ring->buffer_info[i];
1958                 if (buffer_info->skb) {
1959                         pci_unmap_single(pdev,
1960                                          buffer_info->dma,
1961                                          buffer_info->length,
1962                                          PCI_DMA_FROMDEVICE);
1963
1964                         dev_kfree_skb(buffer_info->skb);
1965                         buffer_info->skb = NULL;
1966                 }
1967                 ps_page = &rx_ring->ps_page[i];
1968                 ps_page_dma = &rx_ring->ps_page_dma[i];
1969                 for (j = 0; j < adapter->rx_ps_pages; j++) {
1970                         if (!ps_page->ps_page[j]) break;
1971                         pci_unmap_page(pdev,
1972                                        ps_page_dma->ps_page_dma[j],
1973                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
1974                         ps_page_dma->ps_page_dma[j] = 0;
1975                         put_page(ps_page->ps_page[j]);
1976                         ps_page->ps_page[j] = NULL;
1977                 }
1978         }
1979
1980         size = sizeof(struct e1000_buffer) * rx_ring->count;
1981         memset(rx_ring->buffer_info, 0, size);
1982         size = sizeof(struct e1000_ps_page) * rx_ring->count;
1983         memset(rx_ring->ps_page, 0, size);
1984         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
1985         memset(rx_ring->ps_page_dma, 0, size);
1986
1987         /* Zero out the descriptor ring */
1988
1989         memset(rx_ring->desc, 0, rx_ring->size);
1990
1991         rx_ring->next_to_clean = 0;
1992         rx_ring->next_to_use = 0;
1993
1994         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
1995         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
1996 }
1997
1998 /**
1999  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2000  * @adapter: board private structure
2001  **/
2002
2003 static void
2004 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2005 {
2006         int i;
2007
2008         for (i = 0; i < adapter->num_rx_queues; i++)
2009                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2010 }
2011
2012 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2013  * and memory write and invalidate disabled for certain operations
2014  */
2015 static void
2016 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2017 {
2018         struct net_device *netdev = adapter->netdev;
2019         uint32_t rctl;
2020
2021         e1000_pci_clear_mwi(&adapter->hw);
2022
2023         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2024         rctl |= E1000_RCTL_RST;
2025         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2026         E1000_WRITE_FLUSH(&adapter->hw);
2027         mdelay(5);
2028
2029         if (netif_running(netdev))
2030                 e1000_clean_all_rx_rings(adapter);
2031 }
2032
2033 static void
2034 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2035 {
2036         struct net_device *netdev = adapter->netdev;
2037         uint32_t rctl;
2038
2039         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2040         rctl &= ~E1000_RCTL_RST;
2041         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2042         E1000_WRITE_FLUSH(&adapter->hw);
2043         mdelay(5);
2044
2045         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2046                 e1000_pci_set_mwi(&adapter->hw);
2047
2048         if (netif_running(netdev)) {
2049                 /* No need to loop, because 82542 supports only 1 queue */
2050                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2051                 e1000_configure_rx(adapter);
2052                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2053         }
2054 }
2055
2056 /**
2057  * e1000_set_mac - Change the Ethernet Address of the NIC
2058  * @netdev: network interface device structure
2059  * @p: pointer to an address structure
2060  *
2061  * Returns 0 on success, negative on failure
2062  **/
2063
2064 static int
2065 e1000_set_mac(struct net_device *netdev, void *p)
2066 {
2067         struct e1000_adapter *adapter = netdev_priv(netdev);
2068         struct sockaddr *addr = p;
2069
2070         if (!is_valid_ether_addr(addr->sa_data))
2071                 return -EADDRNOTAVAIL;
2072
2073         /* 82542 2.0 needs to be in reset to write receive address registers */
2074
2075         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2076                 e1000_enter_82542_rst(adapter);
2077
2078         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2079         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2080
2081         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2082
2083         /* With 82571 controllers, LAA may be overwritten (with the default)
2084          * due to controller reset from the other port. */
2085         if (adapter->hw.mac_type == e1000_82571) {
2086                 /* activate the work around */
2087                 adapter->hw.laa_is_present = 1;
2088
2089                 /* Hold a copy of the LAA in RAR[14] This is done so that
2090                  * between the time RAR[0] gets clobbered  and the time it
2091                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2092                  * of the RARs and no incoming packets directed to this port
2093                  * are dropped. Eventaully the LAA will be in RAR[0] and
2094                  * RAR[14] */
2095                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2096                                         E1000_RAR_ENTRIES - 1);
2097         }
2098
2099         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2100                 e1000_leave_82542_rst(adapter);
2101
2102         return 0;
2103 }
2104
2105 /**
2106  * e1000_set_multi - Multicast and Promiscuous mode set
2107  * @netdev: network interface device structure
2108  *
2109  * The set_multi entry point is called whenever the multicast address
2110  * list or the network interface flags are updated.  This routine is
2111  * responsible for configuring the hardware for proper multicast,
2112  * promiscuous mode, and all-multi behavior.
2113  **/
2114
2115 static void
2116 e1000_set_multi(struct net_device *netdev)
2117 {
2118         struct e1000_adapter *adapter = netdev_priv(netdev);
2119         struct e1000_hw *hw = &adapter->hw;
2120         struct dev_mc_list *mc_ptr;
2121         uint32_t rctl;
2122         uint32_t hash_value;
2123         int i, rar_entries = E1000_RAR_ENTRIES;
2124
2125         /* reserve RAR[14] for LAA over-write work-around */
2126         if (adapter->hw.mac_type == e1000_82571)
2127                 rar_entries--;
2128
2129         /* Check for Promiscuous and All Multicast modes */
2130
2131         rctl = E1000_READ_REG(hw, RCTL);
2132
2133         if (netdev->flags & IFF_PROMISC) {
2134                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2135         } else if (netdev->flags & IFF_ALLMULTI) {
2136                 rctl |= E1000_RCTL_MPE;
2137                 rctl &= ~E1000_RCTL_UPE;
2138         } else {
2139                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2140         }
2141
2142         E1000_WRITE_REG(hw, RCTL, rctl);
2143
2144         /* 82542 2.0 needs to be in reset to write receive address registers */
2145
2146         if (hw->mac_type == e1000_82542_rev2_0)
2147                 e1000_enter_82542_rst(adapter);
2148
2149         /* load the first 14 multicast address into the exact filters 1-14
2150          * RAR 0 is used for the station MAC adddress
2151          * if there are not 14 addresses, go ahead and clear the filters
2152          * -- with 82571 controllers only 0-13 entries are filled here
2153          */
2154         mc_ptr = netdev->mc_list;
2155
2156         for (i = 1; i < rar_entries; i++) {
2157                 if (mc_ptr) {
2158                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2159                         mc_ptr = mc_ptr->next;
2160                 } else {
2161                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2162                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2163                 }
2164         }
2165
2166         /* clear the old settings from the multicast hash table */
2167
2168         for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2169                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2170
2171         /* load any remaining addresses into the hash table */
2172
2173         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2174                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2175                 e1000_mta_set(hw, hash_value);
2176         }
2177
2178         if (hw->mac_type == e1000_82542_rev2_0)
2179                 e1000_leave_82542_rst(adapter);
2180 }
2181
2182 /* Need to wait a few seconds after link up to get diagnostic information from
2183  * the phy */
2184
2185 static void
2186 e1000_update_phy_info(unsigned long data)
2187 {
2188         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2189         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2190 }
2191
2192 /**
2193  * e1000_82547_tx_fifo_stall - Timer Call-back
2194  * @data: pointer to adapter cast into an unsigned long
2195  **/
2196
2197 static void
2198 e1000_82547_tx_fifo_stall(unsigned long data)
2199 {
2200         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2201         struct net_device *netdev = adapter->netdev;
2202         uint32_t tctl;
2203
2204         if (atomic_read(&adapter->tx_fifo_stall)) {
2205                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2206                     E1000_READ_REG(&adapter->hw, TDH)) &&
2207                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2208                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2209                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2210                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2211                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2212                         E1000_WRITE_REG(&adapter->hw, TCTL,
2213                                         tctl & ~E1000_TCTL_EN);
2214                         E1000_WRITE_REG(&adapter->hw, TDFT,
2215                                         adapter->tx_head_addr);
2216                         E1000_WRITE_REG(&adapter->hw, TDFH,
2217                                         adapter->tx_head_addr);
2218                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2219                                         adapter->tx_head_addr);
2220                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2221                                         adapter->tx_head_addr);
2222                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2223                         E1000_WRITE_FLUSH(&adapter->hw);
2224
2225                         adapter->tx_fifo_head = 0;
2226                         atomic_set(&adapter->tx_fifo_stall, 0);
2227                         netif_wake_queue(netdev);
2228                 } else {
2229                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2230                 }
2231         }
2232 }
2233
2234 /**
2235  * e1000_watchdog - Timer Call-back
2236  * @data: pointer to adapter cast into an unsigned long
2237  **/
2238 static void
2239 e1000_watchdog(unsigned long data)
2240 {
2241         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2242
2243         /* Do the rest outside of interrupt context */
2244         schedule_work(&adapter->watchdog_task);
2245 }
2246
2247 static void
2248 e1000_watchdog_task(struct e1000_adapter *adapter)
2249 {
2250         struct net_device *netdev = adapter->netdev;
2251         struct e1000_tx_ring *txdr = adapter->tx_ring;
2252         uint32_t link, tctl;
2253
2254         e1000_check_for_link(&adapter->hw);
2255         if (adapter->hw.mac_type == e1000_82573) {
2256                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2257                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2258                         e1000_update_mng_vlan(adapter);
2259         }
2260
2261         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2262            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2263                 link = !adapter->hw.serdes_link_down;
2264         else
2265                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2266
2267         if (link) {
2268                 if (!netif_carrier_ok(netdev)) {
2269                         e1000_get_speed_and_duplex(&adapter->hw,
2270                                                    &adapter->link_speed,
2271                                                    &adapter->link_duplex);
2272
2273                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2274                                adapter->link_speed,
2275                                adapter->link_duplex == FULL_DUPLEX ?
2276                                "Full Duplex" : "Half Duplex");
2277
2278                         /* tweak tx_queue_len according to speed/duplex
2279                          * and adjust the timeout factor */
2280                         netdev->tx_queue_len = adapter->tx_queue_len;
2281                         adapter->tx_timeout_factor = 1;
2282                         adapter->txb2b = 1;
2283                         switch (adapter->link_speed) {
2284                         case SPEED_10:
2285                                 adapter->txb2b = 0;
2286                                 netdev->tx_queue_len = 10;
2287                                 adapter->tx_timeout_factor = 8;
2288                                 break;
2289                         case SPEED_100:
2290                                 adapter->txb2b = 0;
2291                                 netdev->tx_queue_len = 100;
2292                                 /* maybe add some timeout factor ? */
2293                                 break;
2294                         }
2295
2296                         if ((adapter->hw.mac_type == e1000_82571 ||
2297                              adapter->hw.mac_type == e1000_82572) &&
2298                             adapter->txb2b == 0) {
2299 #define SPEED_MODE_BIT (1 << 21)
2300                                 uint32_t tarc0;
2301                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2302                                 tarc0 &= ~SPEED_MODE_BIT;
2303                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2304                         }
2305
2306 #ifdef NETIF_F_TSO
2307                         /* disable TSO for pcie and 10/100 speeds, to avoid
2308                          * some hardware issues */
2309                         if (!adapter->tso_force &&
2310                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2311                                 switch (adapter->link_speed) {
2312                                 case SPEED_10:
2313                                 case SPEED_100:
2314                                         DPRINTK(PROBE,INFO,
2315                                         "10/100 speed: disabling TSO\n");
2316                                         netdev->features &= ~NETIF_F_TSO;
2317                                         break;
2318                                 case SPEED_1000:
2319                                         netdev->features |= NETIF_F_TSO;
2320                                         break;
2321                                 default:
2322                                         /* oops */
2323                                         break;
2324                                 }
2325                         }
2326 #endif
2327
2328                         /* enable transmits in the hardware, need to do this
2329                          * after setting TARC0 */
2330                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2331                         tctl |= E1000_TCTL_EN;
2332                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2333
2334                         netif_carrier_on(netdev);
2335                         netif_wake_queue(netdev);
2336                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2337                         adapter->smartspeed = 0;
2338                 }
2339         } else {
2340                 if (netif_carrier_ok(netdev)) {
2341                         adapter->link_speed = 0;
2342                         adapter->link_duplex = 0;
2343                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2344                         netif_carrier_off(netdev);
2345                         netif_stop_queue(netdev);
2346                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2347                 }
2348
2349                 e1000_smartspeed(adapter);
2350         }
2351
2352         e1000_update_stats(adapter);
2353
2354         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2355         adapter->tpt_old = adapter->stats.tpt;
2356         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2357         adapter->colc_old = adapter->stats.colc;
2358
2359         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2360         adapter->gorcl_old = adapter->stats.gorcl;
2361         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2362         adapter->gotcl_old = adapter->stats.gotcl;
2363
2364         e1000_update_adaptive(&adapter->hw);
2365
2366         if (!netif_carrier_ok(netdev)) {
2367                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2368                         /* We've lost link, so the controller stops DMA,
2369                          * but we've got queued Tx work that's never going
2370                          * to get done, so reset controller to flush Tx.
2371                          * (Do the reset outside of interrupt context). */
2372                         schedule_work(&adapter->tx_timeout_task);
2373                 }
2374         }
2375
2376         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2377         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2378                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2379                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2380                  * else is between 2000-8000. */
2381                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2382                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2383                         adapter->gotcl - adapter->gorcl :
2384                         adapter->gorcl - adapter->gotcl) / 10000;
2385                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2386                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2387         }
2388
2389         /* Cause software interrupt to ensure rx ring is cleaned */
2390         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2391
2392         /* Force detection of hung controller every watchdog period */
2393         adapter->detect_tx_hung = TRUE;
2394
2395         /* With 82571 controllers, LAA may be overwritten due to controller
2396          * reset from the other port. Set the appropriate LAA in RAR[0] */
2397         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2398                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2399
2400         /* Reset the timer */
2401         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2402 }
2403
2404 #define E1000_TX_FLAGS_CSUM             0x00000001
2405 #define E1000_TX_FLAGS_VLAN             0x00000002
2406 #define E1000_TX_FLAGS_TSO              0x00000004
2407 #define E1000_TX_FLAGS_IPV4             0x00000008
2408 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2409 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2410
2411 static inline int
2412 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2413           struct sk_buff *skb)
2414 {
2415 #ifdef NETIF_F_TSO
2416         struct e1000_context_desc *context_desc;
2417         struct e1000_buffer *buffer_info;
2418         unsigned int i;
2419         uint32_t cmd_length = 0;
2420         uint16_t ipcse = 0, tucse, mss;
2421         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2422         int err;
2423
2424         if (skb_shinfo(skb)->tso_size) {
2425                 if (skb_header_cloned(skb)) {
2426                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2427                         if (err)
2428                                 return err;
2429                 }
2430
2431                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2432                 mss = skb_shinfo(skb)->tso_size;
2433                 if (skb->protocol == ntohs(ETH_P_IP)) {
2434                         skb->nh.iph->tot_len = 0;
2435                         skb->nh.iph->check = 0;
2436                         skb->h.th->check =
2437                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2438                                                    skb->nh.iph->daddr,
2439                                                    0,
2440                                                    IPPROTO_TCP,
2441                                                    0);
2442                         cmd_length = E1000_TXD_CMD_IP;
2443                         ipcse = skb->h.raw - skb->data - 1;
2444 #ifdef NETIF_F_TSO_IPV6
2445                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2446                         skb->nh.ipv6h->payload_len = 0;
2447                         skb->h.th->check =
2448                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2449                                                  &skb->nh.ipv6h->daddr,
2450                                                  0,
2451                                                  IPPROTO_TCP,
2452                                                  0);
2453                         ipcse = 0;
2454 #endif
2455                 }
2456                 ipcss = skb->nh.raw - skb->data;
2457                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2458                 tucss = skb->h.raw - skb->data;
2459                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2460                 tucse = 0;
2461
2462                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2463                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2464
2465                 i = tx_ring->next_to_use;
2466                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2467                 buffer_info = &tx_ring->buffer_info[i];
2468
2469                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2470                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2471                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2472                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2473                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2474                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2475                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2476                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2477                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2478
2479                 buffer_info->time_stamp = jiffies;
2480
2481                 if (++i == tx_ring->count) i = 0;
2482                 tx_ring->next_to_use = i;
2483
2484                 return TRUE;
2485         }
2486 #endif
2487
2488         return FALSE;
2489 }
2490
2491 static inline boolean_t
2492 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2493               struct sk_buff *skb)
2494 {
2495         struct e1000_context_desc *context_desc;
2496         struct e1000_buffer *buffer_info;
2497         unsigned int i;
2498         uint8_t css;
2499
2500         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2501                 css = skb->h.raw - skb->data;
2502
2503                 i = tx_ring->next_to_use;
2504                 buffer_info = &tx_ring->buffer_info[i];
2505                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2506
2507                 context_desc->upper_setup.tcp_fields.tucss = css;
2508                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2509                 context_desc->upper_setup.tcp_fields.tucse = 0;
2510                 context_desc->tcp_seg_setup.data = 0;
2511                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2512
2513                 buffer_info->time_stamp = jiffies;
2514
2515                 if (unlikely(++i == tx_ring->count)) i = 0;
2516                 tx_ring->next_to_use = i;
2517
2518                 return TRUE;
2519         }
2520
2521         return FALSE;
2522 }
2523
2524 #define E1000_MAX_TXD_PWR       12
2525 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2526
2527 static inline int
2528 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2529              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2530              unsigned int nr_frags, unsigned int mss)
2531 {
2532         struct e1000_buffer *buffer_info;
2533         unsigned int len = skb->len;
2534         unsigned int offset = 0, size, count = 0, i;
2535         unsigned int f;
2536         len -= skb->data_len;
2537
2538         i = tx_ring->next_to_use;
2539
2540         while (len) {
2541                 buffer_info = &tx_ring->buffer_info[i];
2542                 size = min(len, max_per_txd);
2543 #ifdef NETIF_F_TSO
2544                 /* Workaround for Controller erratum --
2545                  * descriptor for non-tso packet in a linear SKB that follows a
2546                  * tso gets written back prematurely before the data is fully
2547                  * DMAd to the controller */
2548                 if (!skb->data_len && tx_ring->last_tx_tso &&
2549                                 !skb_shinfo(skb)->tso_size) {
2550                         tx_ring->last_tx_tso = 0;
2551                         size -= 4;
2552                 }
2553
2554                 /* Workaround for premature desc write-backs
2555                  * in TSO mode.  Append 4-byte sentinel desc */
2556                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2557                         size -= 4;
2558 #endif
2559                 /* work-around for errata 10 and it applies
2560                  * to all controllers in PCI-X mode
2561                  * The fix is to make sure that the first descriptor of a
2562                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2563                  */
2564                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2565                                 (size > 2015) && count == 0))
2566                         size = 2015;
2567
2568                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2569                  * terminating buffers within evenly-aligned dwords. */
2570                 if (unlikely(adapter->pcix_82544 &&
2571                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2572                    size > 4))
2573                         size -= 4;
2574
2575                 buffer_info->length = size;
2576                 buffer_info->dma =
2577                         pci_map_single(adapter->pdev,
2578                                 skb->data + offset,
2579                                 size,
2580                                 PCI_DMA_TODEVICE);
2581                 buffer_info->time_stamp = jiffies;
2582
2583                 len -= size;
2584                 offset += size;
2585                 count++;
2586                 if (unlikely(++i == tx_ring->count)) i = 0;
2587         }
2588
2589         for (f = 0; f < nr_frags; f++) {
2590                 struct skb_frag_struct *frag;
2591
2592                 frag = &skb_shinfo(skb)->frags[f];
2593                 len = frag->size;
2594                 offset = frag->page_offset;
2595
2596                 while (len) {
2597                         buffer_info = &tx_ring->buffer_info[i];
2598                         size = min(len, max_per_txd);
2599 #ifdef NETIF_F_TSO
2600                         /* Workaround for premature desc write-backs
2601                          * in TSO mode.  Append 4-byte sentinel desc */
2602                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2603                                 size -= 4;
2604 #endif
2605                         /* Workaround for potential 82544 hang in PCI-X.
2606                          * Avoid terminating buffers within evenly-aligned
2607                          * dwords. */
2608                         if (unlikely(adapter->pcix_82544 &&
2609                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2610                            size > 4))
2611                                 size -= 4;
2612
2613                         buffer_info->length = size;
2614                         buffer_info->dma =
2615                                 pci_map_page(adapter->pdev,
2616                                         frag->page,
2617                                         offset,
2618                                         size,
2619                                         PCI_DMA_TODEVICE);
2620                         buffer_info->time_stamp = jiffies;
2621
2622                         len -= size;
2623                         offset += size;
2624                         count++;
2625                         if (unlikely(++i == tx_ring->count)) i = 0;
2626                 }
2627         }
2628
2629         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2630         tx_ring->buffer_info[i].skb = skb;
2631         tx_ring->buffer_info[first].next_to_watch = i;
2632
2633         return count;
2634 }
2635
2636 static inline void
2637 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2638                int tx_flags, int count)
2639 {
2640         struct e1000_tx_desc *tx_desc = NULL;
2641         struct e1000_buffer *buffer_info;
2642         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2643         unsigned int i;
2644
2645         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2646                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2647                              E1000_TXD_CMD_TSE;
2648                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2649
2650                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2651                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2652         }
2653
2654         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2655                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2656                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2657         }
2658
2659         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2660                 txd_lower |= E1000_TXD_CMD_VLE;
2661                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2662         }
2663
2664         i = tx_ring->next_to_use;
2665
2666         while (count--) {
2667                 buffer_info = &tx_ring->buffer_info[i];
2668                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2669                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2670                 tx_desc->lower.data =
2671                         cpu_to_le32(txd_lower | buffer_info->length);
2672                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2673                 if (unlikely(++i == tx_ring->count)) i = 0;
2674         }
2675
2676         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2677
2678         /* Force memory writes to complete before letting h/w
2679          * know there are new descriptors to fetch.  (Only
2680          * applicable for weak-ordered memory model archs,
2681          * such as IA-64). */
2682         wmb();
2683
2684         tx_ring->next_to_use = i;
2685         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2686 }
2687
2688 /**
2689  * 82547 workaround to avoid controller hang in half-duplex environment.
2690  * The workaround is to avoid queuing a large packet that would span
2691  * the internal Tx FIFO ring boundary by notifying the stack to resend
2692  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2693  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2694  * to the beginning of the Tx FIFO.
2695  **/
2696
2697 #define E1000_FIFO_HDR                  0x10
2698 #define E1000_82547_PAD_LEN             0x3E0
2699
2700 static inline int
2701 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2702 {
2703         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2704         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2705
2706         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2707
2708         if (adapter->link_duplex != HALF_DUPLEX)
2709                 goto no_fifo_stall_required;
2710
2711         if (atomic_read(&adapter->tx_fifo_stall))
2712                 return 1;
2713
2714         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2715                 atomic_set(&adapter->tx_fifo_stall, 1);
2716                 return 1;
2717         }
2718
2719 no_fifo_stall_required:
2720         adapter->tx_fifo_head += skb_fifo_len;
2721         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2722                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2723         return 0;
2724 }
2725
2726 #define MINIMUM_DHCP_PACKET_SIZE 282
2727 static inline int
2728 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2729 {
2730         struct e1000_hw *hw =  &adapter->hw;
2731         uint16_t length, offset;
2732         if (vlan_tx_tag_present(skb)) {
2733                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2734                         ( adapter->hw.mng_cookie.status &
2735                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2736                         return 0;
2737         }
2738         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2739                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2740                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2741                         const struct iphdr *ip =
2742                                 (struct iphdr *)((uint8_t *)skb->data+14);
2743                         if (IPPROTO_UDP == ip->protocol) {
2744                                 struct udphdr *udp =
2745                                         (struct udphdr *)((uint8_t *)ip +
2746                                                 (ip->ihl << 2));
2747                                 if (ntohs(udp->dest) == 67) {
2748                                         offset = (uint8_t *)udp + 8 - skb->data;
2749                                         length = skb->len - offset;
2750
2751                                         return e1000_mng_write_dhcp_info(hw,
2752                                                         (uint8_t *)udp + 8,
2753                                                         length);
2754                                 }
2755                         }
2756                 }
2757         }
2758         return 0;
2759 }
2760
2761 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2762 static int
2763 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2764 {
2765         struct e1000_adapter *adapter = netdev_priv(netdev);
2766         struct e1000_tx_ring *tx_ring;
2767         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2768         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2769         unsigned int tx_flags = 0;
2770         unsigned int len = skb->len;
2771         unsigned long flags;
2772         unsigned int nr_frags = 0;
2773         unsigned int mss = 0;
2774         int count = 0;
2775         int tso;
2776         unsigned int f;
2777         len -= skb->data_len;
2778
2779         tx_ring = adapter->tx_ring;
2780
2781         if (unlikely(skb->len <= 0)) {
2782                 dev_kfree_skb_any(skb);
2783                 return NETDEV_TX_OK;
2784         }
2785
2786 #ifdef NETIF_F_TSO
2787         mss = skb_shinfo(skb)->tso_size;
2788         /* The controller does a simple calculation to
2789          * make sure there is enough room in the FIFO before
2790          * initiating the DMA for each buffer.  The calc is:
2791          * 4 = ceil(buffer len/mss).  To make sure we don't
2792          * overrun the FIFO, adjust the max buffer len if mss
2793          * drops. */
2794         if (mss) {
2795                 uint8_t hdr_len;
2796                 max_per_txd = min(mss << 2, max_per_txd);
2797                 max_txd_pwr = fls(max_per_txd) - 1;
2798
2799         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2800          * points to just header, pull a few bytes of payload from
2801          * frags into skb->data */
2802                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2803                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2804                         (adapter->hw.mac_type == e1000_82571 ||
2805                         adapter->hw.mac_type == e1000_82572)) {
2806                         unsigned int pull_size;
2807                         pull_size = min((unsigned int)4, skb->data_len);
2808                         if (!__pskb_pull_tail(skb, pull_size)) {
2809                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2810                                 dev_kfree_skb_any(skb);
2811                                 return -EFAULT;
2812                         }
2813                         len = skb->len - skb->data_len;
2814                 }
2815         }
2816
2817         /* reserve a descriptor for the offload context */
2818         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2819                 count++;
2820         count++;
2821 #else
2822         if (skb->ip_summed == CHECKSUM_HW)
2823                 count++;
2824 #endif
2825
2826 #ifdef NETIF_F_TSO
2827         /* Controller Erratum workaround */
2828         if (!skb->data_len && tx_ring->last_tx_tso &&
2829                 !skb_shinfo(skb)->tso_size)
2830                 count++;
2831 #endif
2832
2833         count += TXD_USE_COUNT(len, max_txd_pwr);
2834
2835         if (adapter->pcix_82544)
2836                 count++;
2837
2838         /* work-around for errata 10 and it applies to all controllers
2839          * in PCI-X mode, so add one more descriptor to the count
2840          */
2841         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2842                         (len > 2015)))
2843                 count++;
2844
2845         nr_frags = skb_shinfo(skb)->nr_frags;
2846         for (f = 0; f < nr_frags; f++)
2847                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2848                                        max_txd_pwr);
2849         if (adapter->pcix_82544)
2850                 count += nr_frags;
2851
2852         if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2853                 e1000_transfer_dhcp_info(adapter, skb);
2854
2855         local_irq_save(flags);
2856         if (!spin_trylock(&tx_ring->tx_lock)) {
2857                 /* Collision - tell upper layer to requeue */
2858                 local_irq_restore(flags);
2859                 return NETDEV_TX_LOCKED;
2860         }
2861
2862         /* need: count + 2 desc gap to keep tail from touching
2863          * head, otherwise try next time */
2864         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2865                 netif_stop_queue(netdev);
2866                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2867                 return NETDEV_TX_BUSY;
2868         }
2869
2870         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2871                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2872                         netif_stop_queue(netdev);
2873                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2874                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2875                         return NETDEV_TX_BUSY;
2876                 }
2877         }
2878
2879         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2880                 tx_flags |= E1000_TX_FLAGS_VLAN;
2881                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2882         }
2883
2884         first = tx_ring->next_to_use;
2885
2886         tso = e1000_tso(adapter, tx_ring, skb);
2887         if (tso < 0) {
2888                 dev_kfree_skb_any(skb);
2889                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2890                 return NETDEV_TX_OK;
2891         }
2892
2893         if (likely(tso)) {
2894                 tx_ring->last_tx_tso = 1;
2895                 tx_flags |= E1000_TX_FLAGS_TSO;
2896         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2897                 tx_flags |= E1000_TX_FLAGS_CSUM;
2898
2899         /* Old method was to assume IPv4 packet by default if TSO was enabled.
2900          * 82571 hardware supports TSO capabilities for IPv6 as well...
2901          * no longer assume, we must. */
2902         if (likely(skb->protocol == ntohs(ETH_P_IP)))
2903                 tx_flags |= E1000_TX_FLAGS_IPV4;
2904
2905         e1000_tx_queue(adapter, tx_ring, tx_flags,
2906                        e1000_tx_map(adapter, tx_ring, skb, first,
2907                                     max_per_txd, nr_frags, mss));
2908
2909         netdev->trans_start = jiffies;
2910
2911         /* Make sure there is space in the ring for the next send. */
2912         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2913                 netif_stop_queue(netdev);
2914
2915         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2916         return NETDEV_TX_OK;
2917 }
2918
2919 /**
2920  * e1000_tx_timeout - Respond to a Tx Hang
2921  * @netdev: network interface device structure
2922  **/
2923
2924 static void
2925 e1000_tx_timeout(struct net_device *netdev)
2926 {
2927         struct e1000_adapter *adapter = netdev_priv(netdev);
2928
2929         /* Do the reset outside of interrupt context */
2930         schedule_work(&adapter->tx_timeout_task);
2931 }
2932
2933 static void
2934 e1000_tx_timeout_task(struct net_device *netdev)
2935 {
2936         struct e1000_adapter *adapter = netdev_priv(netdev);
2937
2938         adapter->tx_timeout_count++;
2939         e1000_down(adapter);
2940         e1000_up(adapter);
2941 }
2942
2943 /**
2944  * e1000_get_stats - Get System Network Statistics
2945  * @netdev: network interface device structure
2946  *
2947  * Returns the address of the device statistics structure.
2948  * The statistics are actually updated from the timer callback.
2949  **/
2950
2951 static struct net_device_stats *
2952 e1000_get_stats(struct net_device *netdev)
2953 {
2954         struct e1000_adapter *adapter = netdev_priv(netdev);
2955
2956         /* only return the current stats */
2957         return &adapter->net_stats;
2958 }
2959
2960 /**
2961  * e1000_change_mtu - Change the Maximum Transfer Unit
2962  * @netdev: network interface device structure
2963  * @new_mtu: new value for maximum frame size
2964  *
2965  * Returns 0 on success, negative on failure
2966  **/
2967
2968 static int
2969 e1000_change_mtu(struct net_device *netdev, int new_mtu)
2970 {
2971         struct e1000_adapter *adapter = netdev_priv(netdev);
2972         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
2973
2974         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
2975             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2976                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
2977                 return -EINVAL;
2978         }
2979
2980         /* Adapter-specific max frame size limits. */
2981         switch (adapter->hw.mac_type) {
2982         case e1000_82542_rev2_0:
2983         case e1000_82542_rev2_1:
2984         case e1000_82573:
2985                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
2986                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
2987                         return -EINVAL;
2988                 }
2989                 break;
2990         case e1000_82571:
2991         case e1000_82572:
2992 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2993                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2994                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
2995                         return -EINVAL;
2996                 }
2997                 break;
2998         default:
2999                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3000                 break;
3001         }
3002
3003
3004         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3005                 adapter->rx_buffer_len = max_frame;
3006                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3007         } else {
3008                 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
3009                    (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
3010                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
3011                                             "on 82542\n");
3012                         return -EINVAL;
3013                 } else {
3014                         if(max_frame <= E1000_RXBUFFER_2048)
3015                                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3016                         else if(max_frame <= E1000_RXBUFFER_4096)
3017                                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3018                         else if(max_frame <= E1000_RXBUFFER_8192)
3019                                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3020                         else if(max_frame <= E1000_RXBUFFER_16384)
3021                                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3022                 }
3023         }
3024
3025         netdev->mtu = new_mtu;
3026
3027         if (netif_running(netdev)) {
3028                 e1000_down(adapter);
3029                 e1000_up(adapter);
3030         }
3031
3032         adapter->hw.max_frame_size = max_frame;
3033
3034         return 0;
3035 }
3036
3037 /**
3038  * e1000_update_stats - Update the board statistics counters
3039  * @adapter: board private structure
3040  **/
3041
3042 void
3043 e1000_update_stats(struct e1000_adapter *adapter)
3044 {
3045         struct e1000_hw *hw = &adapter->hw;
3046         unsigned long flags;
3047         uint16_t phy_tmp;
3048
3049 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3050
3051         spin_lock_irqsave(&adapter->stats_lock, flags);
3052
3053         /* these counters are modified from e1000_adjust_tbi_stats,
3054          * called from the interrupt context, so they must only
3055          * be written while holding adapter->stats_lock
3056          */
3057
3058         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3059         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3060         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3061         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3062         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3063         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3064         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3065         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3066         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3067         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3068         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3069         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3070         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3071
3072         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3073         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3074         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3075         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3076         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3077         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3078         adapter->stats.dc += E1000_READ_REG(hw, DC);
3079         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3080         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3081         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3082         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3083         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3084         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3085         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3086         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3087         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3088         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3089         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3090         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3091         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3092         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3093         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3094         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3095         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3096         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3097         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3098         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3099         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3100         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3101         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3102         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3103         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3104         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3105         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3106
3107         /* used for adaptive IFS */
3108
3109         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3110         adapter->stats.tpt += hw->tx_packet_delta;
3111         hw->collision_delta = E1000_READ_REG(hw, COLC);
3112         adapter->stats.colc += hw->collision_delta;
3113
3114         if (hw->mac_type >= e1000_82543) {
3115                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3116                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3117                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3118                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3119                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3120                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3121         }
3122         if (hw->mac_type > e1000_82547_rev_2) {
3123                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3124                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3125                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3126                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3127                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3128                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3129                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3130                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3131                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3132         }
3133
3134         /* Fill out the OS statistics structure */
3135
3136         adapter->net_stats.rx_packets = adapter->stats.gprc;
3137         adapter->net_stats.tx_packets = adapter->stats.gptc;
3138         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3139         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3140         adapter->net_stats.multicast = adapter->stats.mprc;
3141         adapter->net_stats.collisions = adapter->stats.colc;
3142
3143         /* Rx Errors */
3144
3145         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3146                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3147                 adapter->stats.rlec + adapter->stats.cexterr;
3148         adapter->net_stats.rx_dropped = 0;
3149         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3150         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3151         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3152         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3153
3154         /* Tx Errors */
3155
3156         adapter->net_stats.tx_errors = adapter->stats.ecol +
3157                                        adapter->stats.latecol;
3158         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3159         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3160         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3161
3162         /* Tx Dropped needs to be maintained elsewhere */
3163
3164         /* Phy Stats */
3165
3166         if (hw->media_type == e1000_media_type_copper) {
3167                 if ((adapter->link_speed == SPEED_1000) &&
3168                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3169                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3170                         adapter->phy_stats.idle_errors += phy_tmp;
3171                 }
3172
3173                 if ((hw->mac_type <= e1000_82546) &&
3174                    (hw->phy_type == e1000_phy_m88) &&
3175                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3176                         adapter->phy_stats.receive_errors += phy_tmp;
3177         }
3178
3179         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3180 }
3181
3182 /**
3183  * e1000_intr - Interrupt Handler
3184  * @irq: interrupt number
3185  * @data: pointer to a network interface device structure
3186  * @pt_regs: CPU registers structure
3187  **/
3188
3189 static irqreturn_t
3190 e1000_intr(int irq, void *data, struct pt_regs *regs)
3191 {
3192         struct net_device *netdev = data;
3193         struct e1000_adapter *adapter = netdev_priv(netdev);
3194         struct e1000_hw *hw = &adapter->hw;
3195         uint32_t icr = E1000_READ_REG(hw, ICR);
3196 #ifndef CONFIG_E1000_NAPI
3197         int i;
3198 #else
3199         /* Interrupt Auto-Mask...upon reading ICR,
3200          * interrupts are masked.  No need for the
3201          * IMC write, but it does mean we should
3202          * account for it ASAP. */
3203         if (likely(hw->mac_type >= e1000_82571))
3204                 atomic_inc(&adapter->irq_sem);
3205 #endif
3206
3207         if (unlikely(!icr)) {
3208 #ifdef CONFIG_E1000_NAPI
3209                 if (hw->mac_type >= e1000_82571)
3210                         e1000_irq_enable(adapter);
3211 #endif
3212                 return IRQ_NONE;  /* Not our interrupt */
3213         }
3214
3215         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3216                 hw->get_link_status = 1;
3217                 mod_timer(&adapter->watchdog_timer, jiffies);
3218         }
3219
3220 #ifdef CONFIG_E1000_NAPI
3221         if (unlikely(hw->mac_type < e1000_82571)) {
3222                 atomic_inc(&adapter->irq_sem);
3223                 E1000_WRITE_REG(hw, IMC, ~0);
3224                 E1000_WRITE_FLUSH(hw);
3225         }
3226         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3227                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3228         else
3229                 e1000_irq_enable(adapter);
3230 #else
3231         /* Writing IMC and IMS is needed for 82547.
3232          * Due to Hub Link bus being occupied, an interrupt
3233          * de-assertion message is not able to be sent.
3234          * When an interrupt assertion message is generated later,
3235          * two messages are re-ordered and sent out.
3236          * That causes APIC to think 82547 is in de-assertion
3237          * state, while 82547 is in assertion state, resulting
3238          * in dead lock. Writing IMC forces 82547 into
3239          * de-assertion state.
3240          */
3241         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3242                 atomic_inc(&adapter->irq_sem);
3243                 E1000_WRITE_REG(hw, IMC, ~0);
3244         }
3245
3246         for (i = 0; i < E1000_MAX_INTR; i++)
3247                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3248                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3249                         break;
3250
3251         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3252                 e1000_irq_enable(adapter);
3253
3254 #endif
3255
3256         return IRQ_HANDLED;
3257 }
3258
3259 #ifdef CONFIG_E1000_NAPI
3260 /**
3261  * e1000_clean - NAPI Rx polling callback
3262  * @adapter: board private structure
3263  **/
3264
3265 static int
3266 e1000_clean(struct net_device *poll_dev, int *budget)
3267 {
3268         struct e1000_adapter *adapter;
3269         int work_to_do = min(*budget, poll_dev->quota);
3270         int tx_cleaned = 0, i = 0, work_done = 0;
3271
3272         /* Must NOT use netdev_priv macro here. */
3273         adapter = poll_dev->priv;
3274
3275         /* Keep link state information with original netdev */
3276         if (!netif_carrier_ok(adapter->netdev))
3277                 goto quit_polling;
3278
3279         while (poll_dev != &adapter->polling_netdev[i]) {
3280                 i++;
3281                 if (unlikely(i == adapter->num_rx_queues))
3282                         BUG();
3283         }
3284
3285         if (likely(adapter->num_tx_queues == 1)) {
3286                 /* e1000_clean is called per-cpu.  This lock protects
3287                  * tx_ring[0] from being cleaned by multiple cpus
3288                  * simultaneously.  A failure obtaining the lock means
3289                  * tx_ring[0] is currently being cleaned anyway. */
3290                 if (spin_trylock(&adapter->tx_queue_lock)) {
3291                         tx_cleaned = e1000_clean_tx_irq(adapter,
3292                                                         &adapter->tx_ring[0]);
3293                         spin_unlock(&adapter->tx_queue_lock);
3294                 }
3295         } else
3296                 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3297
3298         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3299                           &work_done, work_to_do);
3300
3301         *budget -= work_done;
3302         poll_dev->quota -= work_done;
3303
3304         /* If no Tx and not enough Rx work done, exit the polling mode */
3305         if ((!tx_cleaned && (work_done == 0)) ||
3306            !netif_running(adapter->netdev)) {
3307 quit_polling:
3308                 netif_rx_complete(poll_dev);
3309                 e1000_irq_enable(adapter);
3310                 return 0;
3311         }
3312
3313         return 1;
3314 }
3315
3316 #endif
3317 /**
3318  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3319  * @adapter: board private structure
3320  **/
3321
3322 static boolean_t
3323 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3324                    struct e1000_tx_ring *tx_ring)
3325 {
3326         struct net_device *netdev = adapter->netdev;
3327         struct e1000_tx_desc *tx_desc, *eop_desc;
3328         struct e1000_buffer *buffer_info;
3329         unsigned int i, eop;
3330         boolean_t cleaned = FALSE;
3331
3332         i = tx_ring->next_to_clean;
3333         eop = tx_ring->buffer_info[i].next_to_watch;
3334         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3335
3336         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3337                 for (cleaned = FALSE; !cleaned; ) {
3338                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3339                         buffer_info = &tx_ring->buffer_info[i];
3340                         cleaned = (i == eop);
3341
3342                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3343                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3344
3345                         if (unlikely(++i == tx_ring->count)) i = 0;
3346                 }
3347
3348
3349                 eop = tx_ring->buffer_info[i].next_to_watch;
3350                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3351         }
3352
3353         tx_ring->next_to_clean = i;
3354
3355         spin_lock(&tx_ring->tx_lock);
3356
3357         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3358                     netif_carrier_ok(netdev)))
3359                 netif_wake_queue(netdev);
3360
3361         spin_unlock(&tx_ring->tx_lock);
3362
3363         if (adapter->detect_tx_hung) {
3364                 /* Detect a transmit hang in hardware, this serializes the
3365                  * check with the clearing of time_stamp and movement of i */
3366                 adapter->detect_tx_hung = FALSE;
3367                 if (tx_ring->buffer_info[eop].dma &&
3368                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3369                                (adapter->tx_timeout_factor * HZ))
3370                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3371                          E1000_STATUS_TXOFF)) {
3372
3373                         /* detected Tx unit hang */
3374                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3375                                         "  Tx Queue             <%lu>\n"
3376                                         "  TDH                  <%x>\n"
3377                                         "  TDT                  <%x>\n"
3378                                         "  next_to_use          <%x>\n"
3379                                         "  next_to_clean        <%x>\n"
3380                                         "buffer_info[next_to_clean]\n"
3381                                         "  time_stamp           <%lx>\n"
3382                                         "  next_to_watch        <%x>\n"
3383                                         "  jiffies              <%lx>\n"
3384                                         "  next_to_watch.status <%x>\n",
3385                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3386                                         sizeof(struct e1000_tx_ring)),
3387                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3388                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3389                                 tx_ring->next_to_use,
3390                                 tx_ring->next_to_clean,
3391                                 tx_ring->buffer_info[eop].time_stamp,
3392                                 eop,
3393                                 jiffies,
3394                                 eop_desc->upper.fields.status);
3395                         netif_stop_queue(netdev);
3396                 }
3397         }
3398         return cleaned;
3399 }
3400
3401 /**
3402  * e1000_rx_checksum - Receive Checksum Offload for 82543
3403  * @adapter:     board private structure
3404  * @status_err:  receive descriptor status and error fields
3405  * @csum:        receive descriptor csum field
3406  * @sk_buff:     socket buffer with received data
3407  **/
3408
3409 static inline void
3410 e1000_rx_checksum(struct e1000_adapter *adapter,
3411                   uint32_t status_err, uint32_t csum,
3412                   struct sk_buff *skb)
3413 {
3414         uint16_t status = (uint16_t)status_err;
3415         uint8_t errors = (uint8_t)(status_err >> 24);
3416         skb->ip_summed = CHECKSUM_NONE;
3417
3418         /* 82543 or newer only */
3419         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3420         /* Ignore Checksum bit is set */
3421         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3422         /* TCP/UDP checksum error bit is set */
3423         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3424                 /* let the stack verify checksum errors */
3425                 adapter->hw_csum_err++;
3426                 return;
3427         }
3428         /* TCP/UDP Checksum has not been calculated */
3429         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3430                 if (!(status & E1000_RXD_STAT_TCPCS))
3431                         return;
3432         } else {
3433                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3434                         return;
3435         }
3436         /* It must be a TCP or UDP packet with a valid checksum */
3437         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3438                 /* TCP checksum is good */
3439                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3440         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3441                 /* IP fragment with UDP payload */
3442                 /* Hardware complements the payload checksum, so we undo it
3443                  * and then put the value in host order for further stack use.
3444                  */
3445                 csum = ntohl(csum ^ 0xFFFF);
3446                 skb->csum = csum;
3447                 skb->ip_summed = CHECKSUM_HW;
3448         }
3449         adapter->hw_csum_good++;
3450 }
3451
3452 /**
3453  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3454  * @adapter: board private structure
3455  **/
3456
3457 static boolean_t
3458 #ifdef CONFIG_E1000_NAPI
3459 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3460                    struct e1000_rx_ring *rx_ring,
3461                    int *work_done, int work_to_do)
3462 #else
3463 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3464                    struct e1000_rx_ring *rx_ring)
3465 #endif
3466 {
3467         struct net_device *netdev = adapter->netdev;
3468         struct pci_dev *pdev = adapter->pdev;
3469         struct e1000_rx_desc *rx_desc, *next_rxd;
3470         struct e1000_buffer *buffer_info, *next_buffer;
3471         unsigned long flags;
3472         uint32_t length;
3473         uint8_t last_byte;
3474         unsigned int i;
3475         int cleaned_count = 0;
3476         boolean_t cleaned = FALSE;
3477
3478         i = rx_ring->next_to_clean;
3479         rx_desc = E1000_RX_DESC(*rx_ring, i);
3480         buffer_info = &rx_ring->buffer_info[i];
3481
3482         while (rx_desc->status & E1000_RXD_STAT_DD) {
3483                 struct sk_buff *skb, *next_skb;
3484                 u8 status;
3485 #ifdef CONFIG_E1000_NAPI
3486                 if (*work_done >= work_to_do)
3487                         break;
3488                 (*work_done)++;
3489 #endif
3490                 status = rx_desc->status;
3491                 skb = buffer_info->skb;
3492                 buffer_info->skb = NULL;
3493
3494                 if (++i == rx_ring->count) i = 0;
3495                 next_rxd = E1000_RX_DESC(*rx_ring, i);
3496                 next_buffer = &rx_ring->buffer_info[i];
3497                 next_skb = next_buffer->skb;
3498
3499                 cleaned = TRUE;
3500                 cleaned_count++;
3501                 pci_unmap_single(pdev,
3502                                  buffer_info->dma,
3503                                  buffer_info->length,
3504                                  PCI_DMA_FROMDEVICE);
3505
3506                 length = le16_to_cpu(rx_desc->length);
3507
3508                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3509                         /* All receives must fit into a single buffer */
3510                         E1000_DBG("%s: Receive packet consumed multiple"
3511                                   " buffers\n", netdev->name);
3512                         dev_kfree_skb_irq(skb);
3513                         goto next_desc;
3514                 }
3515
3516                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3517                         last_byte = *(skb->data + length - 1);
3518                         if (TBI_ACCEPT(&adapter->hw, status,
3519                                       rx_desc->errors, length, last_byte)) {
3520                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3521                                 e1000_tbi_adjust_stats(&adapter->hw,
3522                                                        &adapter->stats,
3523                                                        length, skb->data);
3524                                 spin_unlock_irqrestore(&adapter->stats_lock,
3525                                                        flags);
3526                                 length--;
3527                         } else {
3528                                 dev_kfree_skb_irq(skb);
3529                                 goto next_desc;
3530                         }
3531                 }
3532
3533                 /* code added for copybreak, this should improve
3534                  * performance for small packets with large amounts
3535                  * of reassembly being done in the stack */
3536 #define E1000_CB_LENGTH 256
3537                 if (length < E1000_CB_LENGTH) {
3538                         struct sk_buff *new_skb =
3539                             dev_alloc_skb(length + NET_IP_ALIGN);
3540                         if (new_skb) {
3541                                 skb_reserve(new_skb, NET_IP_ALIGN);
3542                                 new_skb->dev = netdev;
3543                                 memcpy(new_skb->data - NET_IP_ALIGN,
3544                                        skb->data - NET_IP_ALIGN,
3545                                        length + NET_IP_ALIGN);
3546                                 /* save the skb in buffer_info as good */
3547                                 buffer_info->skb = skb;
3548                                 skb = new_skb;
3549                                 skb_put(skb, length);
3550                         }
3551                 } else
3552                         skb_put(skb, length);
3553
3554                 /* end copybreak code */
3555
3556                 /* Receive Checksum Offload */
3557                 e1000_rx_checksum(adapter,
3558                                   (uint32_t)(status) |
3559                                   ((uint32_t)(rx_desc->errors) << 24),
3560                                   rx_desc->csum, skb);
3561
3562                 skb->protocol = eth_type_trans(skb, netdev);
3563 #ifdef CONFIG_E1000_NAPI
3564                 if (unlikely(adapter->vlgrp &&
3565                             (status & E1000_RXD_STAT_VP))) {
3566                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3567                                                  le16_to_cpu(rx_desc->special) &
3568                                                  E1000_RXD_SPC_VLAN_MASK);
3569                 } else {
3570                         netif_receive_skb(skb);
3571                 }
3572 #else /* CONFIG_E1000_NAPI */
3573                 if (unlikely(adapter->vlgrp &&
3574                             (status & E1000_RXD_STAT_VP))) {
3575                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3576                                         le16_to_cpu(rx_desc->special) &
3577                                         E1000_RXD_SPC_VLAN_MASK);
3578                 } else {
3579                         netif_rx(skb);
3580                 }
3581 #endif /* CONFIG_E1000_NAPI */
3582                 netdev->last_rx = jiffies;
3583
3584 next_desc:
3585                 rx_desc->status = 0;
3586
3587                 /* return some buffers to hardware, one at a time is too slow */
3588                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3589                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3590                         cleaned_count = 0;
3591                 }
3592
3593                 rx_desc = next_rxd;
3594                 buffer_info = next_buffer;
3595         }
3596         rx_ring->next_to_clean = i;
3597
3598         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3599         if (cleaned_count)
3600                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3601
3602         return cleaned;
3603 }
3604
3605 /**
3606  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3607  * @adapter: board private structure
3608  **/
3609
3610 static boolean_t
3611 #ifdef CONFIG_E1000_NAPI
3612 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3613                       struct e1000_rx_ring *rx_ring,
3614                       int *work_done, int work_to_do)
3615 #else
3616 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3617                       struct e1000_rx_ring *rx_ring)
3618 #endif
3619 {
3620         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3621         struct net_device *netdev = adapter->netdev;
3622         struct pci_dev *pdev = adapter->pdev;
3623         struct e1000_buffer *buffer_info, *next_buffer;
3624         struct e1000_ps_page *ps_page;
3625         struct e1000_ps_page_dma *ps_page_dma;
3626         struct sk_buff *skb, *next_skb;
3627         unsigned int i, j;
3628         uint32_t length, staterr;
3629         int cleaned_count = 0;
3630         boolean_t cleaned = FALSE;
3631
3632         i = rx_ring->next_to_clean;
3633         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3634         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3635         buffer_info = &rx_ring->buffer_info[i];
3636
3637         while (staterr & E1000_RXD_STAT_DD) {
3638                 ps_page = &rx_ring->ps_page[i];
3639                 ps_page_dma = &rx_ring->ps_page_dma[i];
3640 #ifdef CONFIG_E1000_NAPI
3641                 if (unlikely(*work_done >= work_to_do))
3642                         break;
3643                 (*work_done)++;
3644 #endif
3645                 skb = buffer_info->skb;
3646
3647                 if (++i == rx_ring->count) i = 0;
3648                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3649                 next_buffer = &rx_ring->buffer_info[i];
3650                 next_skb = next_buffer->skb;
3651
3652                 cleaned = TRUE;
3653                 cleaned_count++;
3654                 pci_unmap_single(pdev, buffer_info->dma,
3655                                  buffer_info->length,
3656                                  PCI_DMA_FROMDEVICE);
3657
3658                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3659                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3660                                   " the full packet\n", netdev->name);
3661                         dev_kfree_skb_irq(skb);
3662                         goto next_desc;
3663                 }
3664
3665                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3666                         dev_kfree_skb_irq(skb);
3667                         goto next_desc;
3668                 }
3669
3670                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3671
3672                 if (unlikely(!length)) {
3673                         E1000_DBG("%s: Last part of the packet spanning"
3674                                   " multiple descriptors\n", netdev->name);
3675                         dev_kfree_skb_irq(skb);
3676                         goto next_desc;
3677                 }
3678
3679                 /* Good Receive */
3680                 skb_put(skb, length);
3681
3682                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3683                         if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3684                                 break;
3685
3686                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3687                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3688                         ps_page_dma->ps_page_dma[j] = 0;
3689                         skb_shinfo(skb)->frags[j].page =
3690                                 ps_page->ps_page[j];
3691                         ps_page->ps_page[j] = NULL;
3692                         skb_shinfo(skb)->frags[j].page_offset = 0;
3693                         skb_shinfo(skb)->frags[j].size = length;
3694                         skb_shinfo(skb)->nr_frags++;
3695                         skb->len += length;
3696                         skb->data_len += length;
3697                 }
3698
3699                 e1000_rx_checksum(adapter, staterr,
3700                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3701                 skb->protocol = eth_type_trans(skb, netdev);
3702
3703                 if (likely(rx_desc->wb.upper.header_status &
3704                           E1000_RXDPS_HDRSTAT_HDRSP))
3705                         adapter->rx_hdr_split++;
3706 #ifdef CONFIG_E1000_NAPI
3707                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3708                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3709                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3710                                 E1000_RXD_SPC_VLAN_MASK);
3711                 } else {
3712                         netif_receive_skb(skb);
3713                 }
3714 #else /* CONFIG_E1000_NAPI */
3715                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3716                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3717                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3718                                 E1000_RXD_SPC_VLAN_MASK);
3719                 } else {
3720                         netif_rx(skb);
3721                 }
3722 #endif /* CONFIG_E1000_NAPI */
3723                 netdev->last_rx = jiffies;
3724
3725 next_desc:
3726                 rx_desc->wb.middle.status_error &= ~0xFF;
3727                 buffer_info->skb = NULL;
3728
3729                 /* return some buffers to hardware, one at a time is too slow */
3730                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3731                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3732                         cleaned_count = 0;
3733                 }
3734
3735                 rx_desc = next_rxd;
3736                 buffer_info = next_buffer;
3737
3738                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3739         }
3740         rx_ring->next_to_clean = i;
3741
3742         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3743         if (cleaned_count)
3744                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3745
3746         return cleaned;
3747 }
3748
3749 /**
3750  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3751  * @adapter: address of board private structure
3752  **/
3753
3754 static void
3755 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3756                        struct e1000_rx_ring *rx_ring,
3757                        int cleaned_count)
3758 {
3759         struct net_device *netdev = adapter->netdev;
3760         struct pci_dev *pdev = adapter->pdev;
3761         struct e1000_rx_desc *rx_desc;
3762         struct e1000_buffer *buffer_info;
3763         struct sk_buff *skb;
3764         unsigned int i;
3765         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3766
3767         i = rx_ring->next_to_use;
3768         buffer_info = &rx_ring->buffer_info[i];
3769
3770         while (cleaned_count--) {
3771                 if (!(skb = buffer_info->skb))
3772                         skb = dev_alloc_skb(bufsz);
3773                 else {
3774                         skb_trim(skb, 0);
3775                         goto map_skb;
3776                 }
3777
3778
3779                 if (unlikely(!skb)) {
3780                         /* Better luck next round */
3781                         adapter->alloc_rx_buff_failed++;
3782                         break;
3783                 }
3784
3785                 /* Fix for errata 23, can't cross 64kB boundary */
3786                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3787                         struct sk_buff *oldskb = skb;
3788                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3789                                              "at %p\n", bufsz, skb->data);
3790                         /* Try again, without freeing the previous */
3791                         skb = dev_alloc_skb(bufsz);
3792                         /* Failed allocation, critical failure */
3793                         if (!skb) {
3794                                 dev_kfree_skb(oldskb);
3795                                 break;
3796                         }
3797
3798                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3799                                 /* give up */
3800                                 dev_kfree_skb(skb);
3801                                 dev_kfree_skb(oldskb);
3802                                 break; /* while !buffer_info->skb */
3803                         } else {
3804                                 /* Use new allocation */
3805                                 dev_kfree_skb(oldskb);
3806                         }
3807                 }
3808                 /* Make buffer alignment 2 beyond a 16 byte boundary
3809                  * this will result in a 16 byte aligned IP header after
3810                  * the 14 byte MAC header is removed
3811                  */
3812                 skb_reserve(skb, NET_IP_ALIGN);
3813
3814                 skb->dev = netdev;
3815
3816                 buffer_info->skb = skb;
3817                 buffer_info->length = adapter->rx_buffer_len;
3818 map_skb:
3819                 buffer_info->dma = pci_map_single(pdev,
3820                                                   skb->data,
3821                                                   adapter->rx_buffer_len,
3822                                                   PCI_DMA_FROMDEVICE);
3823
3824                 /* Fix for errata 23, can't cross 64kB boundary */
3825                 if (!e1000_check_64k_bound(adapter,
3826                                         (void *)(unsigned long)buffer_info->dma,
3827                                         adapter->rx_buffer_len)) {
3828                         DPRINTK(RX_ERR, ERR,
3829                                 "dma align check failed: %u bytes at %p\n",
3830                                 adapter->rx_buffer_len,
3831                                 (void *)(unsigned long)buffer_info->dma);
3832                         dev_kfree_skb(skb);
3833                         buffer_info->skb = NULL;
3834
3835                         pci_unmap_single(pdev, buffer_info->dma,
3836                                          adapter->rx_buffer_len,
3837                                          PCI_DMA_FROMDEVICE);
3838
3839                         break; /* while !buffer_info->skb */
3840                 }
3841                 rx_desc = E1000_RX_DESC(*rx_ring, i);
3842                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3843
3844                 if (unlikely(++i == rx_ring->count))
3845                         i = 0;
3846                 buffer_info = &rx_ring->buffer_info[i];
3847         }
3848
3849         if (likely(rx_ring->next_to_use != i)) {
3850                 rx_ring->next_to_use = i;
3851                 if (unlikely(i-- == 0))
3852                         i = (rx_ring->count - 1);
3853
3854                 /* Force memory writes to complete before letting h/w
3855                  * know there are new descriptors to fetch.  (Only
3856                  * applicable for weak-ordered memory model archs,
3857                  * such as IA-64). */
3858                 wmb();
3859                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3860         }
3861 }
3862
3863 /**
3864  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3865  * @adapter: address of board private structure
3866  **/
3867
3868 static void
3869 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3870                           struct e1000_rx_ring *rx_ring,
3871                           int cleaned_count)
3872 {
3873         struct net_device *netdev = adapter->netdev;
3874         struct pci_dev *pdev = adapter->pdev;
3875         union e1000_rx_desc_packet_split *rx_desc;
3876         struct e1000_buffer *buffer_info;
3877         struct e1000_ps_page *ps_page;
3878         struct e1000_ps_page_dma *ps_page_dma;
3879         struct sk_buff *skb;
3880         unsigned int i, j;
3881
3882         i = rx_ring->next_to_use;
3883         buffer_info = &rx_ring->buffer_info[i];
3884         ps_page = &rx_ring->ps_page[i];
3885         ps_page_dma = &rx_ring->ps_page_dma[i];
3886
3887         while (cleaned_count--) {
3888                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3889
3890                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
3891                         if (j < adapter->rx_ps_pages) {
3892                                 if (likely(!ps_page->ps_page[j])) {
3893                                         ps_page->ps_page[j] =
3894                                                 alloc_page(GFP_ATOMIC);
3895                                         if (unlikely(!ps_page->ps_page[j])) {
3896                                                 adapter->alloc_rx_buff_failed++;
3897                                                 goto no_buffers;
3898                                         }
3899                                         ps_page_dma->ps_page_dma[j] =
3900                                                 pci_map_page(pdev,
3901                                                             ps_page->ps_page[j],
3902                                                             0, PAGE_SIZE,
3903                                                             PCI_DMA_FROMDEVICE);
3904                                 }
3905                                 /* Refresh the desc even if buffer_addrs didn't
3906                                  * change because each write-back erases
3907                                  * this info.
3908                                  */
3909                                 rx_desc->read.buffer_addr[j+1] =
3910                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
3911                         } else
3912                                 rx_desc->read.buffer_addr[j+1] = ~0;
3913                 }
3914
3915                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
3916
3917                 if (unlikely(!skb)) {
3918                         adapter->alloc_rx_buff_failed++;
3919                         break;
3920                 }
3921
3922                 /* Make buffer alignment 2 beyond a 16 byte boundary
3923                  * this will result in a 16 byte aligned IP header after
3924                  * the 14 byte MAC header is removed
3925                  */
3926                 skb_reserve(skb, NET_IP_ALIGN);
3927
3928                 skb->dev = netdev;
3929
3930                 buffer_info->skb = skb;
3931                 buffer_info->length = adapter->rx_ps_bsize0;
3932                 buffer_info->dma = pci_map_single(pdev, skb->data,
3933                                                   adapter->rx_ps_bsize0,
3934                                                   PCI_DMA_FROMDEVICE);
3935
3936                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
3937
3938                 if (unlikely(++i == rx_ring->count)) i = 0;
3939                 buffer_info = &rx_ring->buffer_info[i];
3940                 ps_page = &rx_ring->ps_page[i];
3941                 ps_page_dma = &rx_ring->ps_page_dma[i];
3942         }
3943
3944 no_buffers:
3945         if (likely(rx_ring->next_to_use != i)) {
3946                 rx_ring->next_to_use = i;
3947                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
3948
3949                 /* Force memory writes to complete before letting h/w
3950                  * know there are new descriptors to fetch.  (Only
3951                  * applicable for weak-ordered memory model archs,
3952                  * such as IA-64). */
3953                 wmb();
3954                 /* Hardware increments by 16 bytes, but packet split
3955                  * descriptors are 32 bytes...so we increment tail
3956                  * twice as much.
3957                  */
3958                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
3959         }
3960 }
3961
3962 /**
3963  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
3964  * @adapter:
3965  **/
3966
3967 static void
3968 e1000_smartspeed(struct e1000_adapter *adapter)
3969 {
3970         uint16_t phy_status;
3971         uint16_t phy_ctrl;
3972
3973         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
3974            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
3975                 return;
3976
3977         if (adapter->smartspeed == 0) {
3978                 /* If Master/Slave config fault is asserted twice,
3979                  * we assume back-to-back */
3980                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3981                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3982                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
3983                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
3984                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
3985                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
3986                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
3987                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
3988                                             phy_ctrl);
3989                         adapter->smartspeed++;
3990                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
3991                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
3992                                                &phy_ctrl)) {
3993                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
3994                                              MII_CR_RESTART_AUTO_NEG);
3995                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
3996                                                     phy_ctrl);
3997                         }
3998                 }
3999                 return;
4000         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4001                 /* If still no link, perhaps using 2/3 pair cable */
4002                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4003                 phy_ctrl |= CR_1000T_MS_ENABLE;
4004                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4005                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4006                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4007                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4008                                      MII_CR_RESTART_AUTO_NEG);
4009                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4010                 }
4011         }
4012         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4013         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4014                 adapter->smartspeed = 0;
4015 }
4016
4017 /**
4018  * e1000_ioctl -
4019  * @netdev:
4020  * @ifreq:
4021  * @cmd:
4022  **/
4023
4024 static int
4025 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4026 {
4027         switch (cmd) {
4028         case SIOCGMIIPHY:
4029         case SIOCGMIIREG:
4030         case SIOCSMIIREG:
4031                 return e1000_mii_ioctl(netdev, ifr, cmd);
4032         default:
4033                 return -EOPNOTSUPP;
4034         }
4035 }
4036
4037 /**
4038  * e1000_mii_ioctl -
4039  * @netdev:
4040  * @ifreq:
4041  * @cmd:
4042  **/
4043
4044 static int
4045 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4046 {
4047         struct e1000_adapter *adapter = netdev_priv(netdev);
4048         struct mii_ioctl_data *data = if_mii(ifr);
4049         int retval;
4050         uint16_t mii_reg;
4051         uint16_t spddplx;
4052         unsigned long flags;
4053
4054         if (adapter->hw.media_type != e1000_media_type_copper)
4055                 return -EOPNOTSUPP;
4056
4057         switch (cmd) {
4058         case SIOCGMIIPHY:
4059                 data->phy_id = adapter->hw.phy_addr;
4060                 break;
4061         case SIOCGMIIREG:
4062                 if (!capable(CAP_NET_ADMIN))
4063                         return -EPERM;
4064                 spin_lock_irqsave(&adapter->stats_lock, flags);
4065                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4066                                    &data->val_out)) {
4067                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4068                         return -EIO;
4069                 }
4070                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4071                 break;
4072         case SIOCSMIIREG:
4073                 if (!capable(CAP_NET_ADMIN))
4074                         return -EPERM;
4075                 if (data->reg_num & ~(0x1F))
4076                         return -EFAULT;
4077                 mii_reg = data->val_in;
4078                 spin_lock_irqsave(&adapter->stats_lock, flags);
4079                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4080                                         mii_reg)) {
4081                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4082                         return -EIO;
4083                 }
4084                 if (adapter->hw.phy_type == e1000_phy_m88) {
4085                         switch (data->reg_num) {
4086                         case PHY_CTRL:
4087                                 if (mii_reg & MII_CR_POWER_DOWN)
4088                                         break;
4089                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4090                                         adapter->hw.autoneg = 1;
4091                                         adapter->hw.autoneg_advertised = 0x2F;
4092                                 } else {
4093                                         if (mii_reg & 0x40)
4094                                                 spddplx = SPEED_1000;
4095                                         else if (mii_reg & 0x2000)
4096                                                 spddplx = SPEED_100;
4097                                         else
4098                                                 spddplx = SPEED_10;
4099                                         spddplx += (mii_reg & 0x100)
4100                                                    ? FULL_DUPLEX :
4101                                                    HALF_DUPLEX;
4102                                         retval = e1000_set_spd_dplx(adapter,
4103                                                                     spddplx);
4104                                         if (retval) {
4105                                                 spin_unlock_irqrestore(
4106                                                         &adapter->stats_lock,
4107                                                         flags);
4108                                                 return retval;
4109                                         }
4110                                 }
4111                                 if (netif_running(adapter->netdev)) {
4112                                         e1000_down(adapter);
4113                                         e1000_up(adapter);
4114                                 } else
4115                                         e1000_reset(adapter);
4116                                 break;
4117                         case M88E1000_PHY_SPEC_CTRL:
4118                         case M88E1000_EXT_PHY_SPEC_CTRL:
4119                                 if (e1000_phy_reset(&adapter->hw)) {
4120                                         spin_unlock_irqrestore(
4121                                                 &adapter->stats_lock, flags);
4122                                         return -EIO;
4123                                 }
4124                                 break;
4125                         }
4126                 } else {
4127                         switch (data->reg_num) {
4128                         case PHY_CTRL:
4129                                 if (mii_reg & MII_CR_POWER_DOWN)
4130                                         break;
4131                                 if (netif_running(adapter->netdev)) {
4132                                         e1000_down(adapter);
4133                                         e1000_up(adapter);
4134                                 } else
4135                                         e1000_reset(adapter);
4136                                 break;
4137                         }
4138                 }
4139                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4140                 break;
4141         default:
4142                 return -EOPNOTSUPP;
4143         }
4144         return E1000_SUCCESS;
4145 }
4146
4147 void
4148 e1000_pci_set_mwi(struct e1000_hw *hw)
4149 {
4150         struct e1000_adapter *adapter = hw->back;
4151         int ret_val = pci_set_mwi(adapter->pdev);
4152
4153         if (ret_val)
4154                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4155 }
4156
4157 void
4158 e1000_pci_clear_mwi(struct e1000_hw *hw)
4159 {
4160         struct e1000_adapter *adapter = hw->back;
4161
4162         pci_clear_mwi(adapter->pdev);
4163 }
4164
4165 void
4166 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4167 {
4168         struct e1000_adapter *adapter = hw->back;
4169
4170         pci_read_config_word(adapter->pdev, reg, value);
4171 }
4172
4173 void
4174 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4175 {
4176         struct e1000_adapter *adapter = hw->back;
4177
4178         pci_write_config_word(adapter->pdev, reg, *value);
4179 }
4180
4181 uint32_t
4182 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4183 {
4184         return inl(port);
4185 }
4186
4187 void
4188 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4189 {
4190         outl(value, port);
4191 }
4192
4193 static void
4194 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4195 {
4196         struct e1000_adapter *adapter = netdev_priv(netdev);
4197         uint32_t ctrl, rctl;
4198
4199         e1000_irq_disable(adapter);
4200         adapter->vlgrp = grp;
4201
4202         if (grp) {
4203                 /* enable VLAN tag insert/strip */
4204                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4205                 ctrl |= E1000_CTRL_VME;
4206                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4207
4208                 /* enable VLAN receive filtering */
4209                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4210                 rctl |= E1000_RCTL_VFE;
4211                 rctl &= ~E1000_RCTL_CFIEN;
4212                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4213                 e1000_update_mng_vlan(adapter);
4214         } else {
4215                 /* disable VLAN tag insert/strip */
4216                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4217                 ctrl &= ~E1000_CTRL_VME;
4218                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4219
4220                 /* disable VLAN filtering */
4221                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4222                 rctl &= ~E1000_RCTL_VFE;
4223                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4224                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4225                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4226                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4227                 }
4228         }
4229
4230         e1000_irq_enable(adapter);
4231 }
4232
4233 static void
4234 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4235 {
4236         struct e1000_adapter *adapter = netdev_priv(netdev);
4237         uint32_t vfta, index;
4238
4239         if ((adapter->hw.mng_cookie.status &
4240              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4241             (vid == adapter->mng_vlan_id))
4242                 return;
4243         /* add VID to filter table */
4244         index = (vid >> 5) & 0x7F;
4245         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4246         vfta |= (1 << (vid & 0x1F));
4247         e1000_write_vfta(&adapter->hw, index, vfta);
4248 }
4249
4250 static void
4251 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4252 {
4253         struct e1000_adapter *adapter = netdev_priv(netdev);
4254         uint32_t vfta, index;
4255
4256         e1000_irq_disable(adapter);
4257
4258         if (adapter->vlgrp)
4259                 adapter->vlgrp->vlan_devices[vid] = NULL;
4260
4261         e1000_irq_enable(adapter);
4262
4263         if ((adapter->hw.mng_cookie.status &
4264              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4265             (vid == adapter->mng_vlan_id)) {
4266                 /* release control to f/w */
4267                 e1000_release_hw_control(adapter);
4268                 return;
4269         }
4270
4271         /* remove VID from filter table */
4272         index = (vid >> 5) & 0x7F;
4273         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4274         vfta &= ~(1 << (vid & 0x1F));
4275         e1000_write_vfta(&adapter->hw, index, vfta);
4276 }
4277
4278 static void
4279 e1000_restore_vlan(struct e1000_adapter *adapter)
4280 {
4281         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4282
4283         if (adapter->vlgrp) {
4284                 uint16_t vid;
4285                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4286                         if (!adapter->vlgrp->vlan_devices[vid])
4287                                 continue;
4288                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4289                 }
4290         }
4291 }
4292
4293 int
4294 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4295 {
4296         adapter->hw.autoneg = 0;
4297
4298         /* Fiber NICs only allow 1000 gbps Full duplex */
4299         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4300                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4301                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4302                 return -EINVAL;
4303         }
4304
4305         switch (spddplx) {
4306         case SPEED_10 + DUPLEX_HALF:
4307                 adapter->hw.forced_speed_duplex = e1000_10_half;
4308                 break;
4309         case SPEED_10 + DUPLEX_FULL:
4310                 adapter->hw.forced_speed_duplex = e1000_10_full;
4311                 break;
4312         case SPEED_100 + DUPLEX_HALF:
4313                 adapter->hw.forced_speed_duplex = e1000_100_half;
4314                 break;
4315         case SPEED_100 + DUPLEX_FULL:
4316                 adapter->hw.forced_speed_duplex = e1000_100_full;
4317                 break;
4318         case SPEED_1000 + DUPLEX_FULL:
4319                 adapter->hw.autoneg = 1;
4320                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4321                 break;
4322         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4323         default:
4324                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4325                 return -EINVAL;
4326         }
4327         return 0;
4328 }
4329
4330 #ifdef CONFIG_PM
4331 /* these functions save and restore 16 or 64 dwords (64-256 bytes) of config
4332  * space versus the 64 bytes that pci_[save|restore]_state handle
4333  */
4334 #define PCIE_CONFIG_SPACE_LEN 256
4335 #define PCI_CONFIG_SPACE_LEN 64
4336 static int
4337 e1000_pci_save_state(struct e1000_adapter *adapter)
4338 {
4339         struct pci_dev *dev = adapter->pdev;
4340         int size;
4341         int i;
4342         if (adapter->hw.mac_type >= e1000_82571)
4343                 size = PCIE_CONFIG_SPACE_LEN;
4344         else
4345                 size = PCI_CONFIG_SPACE_LEN;
4346
4347         WARN_ON(adapter->config_space != NULL);
4348
4349         adapter->config_space = kmalloc(size, GFP_KERNEL);
4350         if (!adapter->config_space) {
4351                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4352                 return -ENOMEM;
4353         }
4354         for (i = 0; i < (size / 4); i++)
4355                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4356         return 0;
4357 }
4358
4359 static void
4360 e1000_pci_restore_state(struct e1000_adapter *adapter)
4361 {
4362         struct pci_dev *dev = adapter->pdev;
4363         int size;
4364         int i;
4365         if (adapter->config_space == NULL)
4366                 return;
4367         if (adapter->hw.mac_type >= e1000_82571)
4368                 size = PCIE_CONFIG_SPACE_LEN;
4369         else
4370                 size = PCI_CONFIG_SPACE_LEN;
4371         for (i = 0; i < (size / 4); i++)
4372                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4373         kfree(adapter->config_space);
4374         adapter->config_space = NULL;
4375         return;
4376 }
4377 #endif /* CONFIG_PM */
4378
4379 static int
4380 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4381 {
4382         struct net_device *netdev = pci_get_drvdata(pdev);
4383         struct e1000_adapter *adapter = netdev_priv(netdev);
4384         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4385         uint32_t wufc = adapter->wol;
4386         int retval = 0;
4387
4388         netif_device_detach(netdev);
4389
4390         if (netif_running(netdev))
4391                 e1000_down(adapter);
4392
4393 #ifdef CONFIG_PM
4394         /* implement our own version of pci_save_state(pdev) because pci
4395          * express adapters have larger 256 byte config spaces */
4396         retval = e1000_pci_save_state(adapter);
4397         if (retval)
4398                 return retval;
4399 #endif
4400
4401         status = E1000_READ_REG(&adapter->hw, STATUS);
4402         if (status & E1000_STATUS_LU)
4403                 wufc &= ~E1000_WUFC_LNKC;
4404
4405         if (wufc) {
4406                 e1000_setup_rctl(adapter);
4407                 e1000_set_multi(netdev);
4408
4409                 /* turn on all-multi mode if wake on multicast is enabled */
4410                 if (adapter->wol & E1000_WUFC_MC) {
4411                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4412                         rctl |= E1000_RCTL_MPE;
4413                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4414                 }
4415
4416                 if (adapter->hw.mac_type >= e1000_82540) {
4417                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4418                         /* advertise wake from D3Cold */
4419                         #define E1000_CTRL_ADVD3WUC 0x00100000
4420                         /* phy power management enable */
4421                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4422                         ctrl |= E1000_CTRL_ADVD3WUC |
4423                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4424                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4425                 }
4426
4427                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4428                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4429                         /* keep the laser running in D3 */
4430                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4431                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4432                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4433                 }
4434
4435                 /* Allow time for pending master requests to run */
4436                 e1000_disable_pciex_master(&adapter->hw);
4437
4438                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4439                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4440                 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4441                 if (retval)
4442                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4443                 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4444                 if (retval)
4445                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4446         } else {
4447                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4448                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4449                 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4450                 if (retval)
4451                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4452                 retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
4453                 if (retval)
4454                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4455         }
4456
4457         if (adapter->hw.mac_type >= e1000_82540 &&
4458            adapter->hw.media_type == e1000_media_type_copper) {
4459                 manc = E1000_READ_REG(&adapter->hw, MANC);
4460                 if (manc & E1000_MANC_SMBUS_EN) {
4461                         manc |= E1000_MANC_ARP_EN;
4462                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4463                         retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4464                         if (retval)
4465                                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4466                         retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4467                         if (retval)
4468                                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4469                 }
4470         }
4471
4472         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4473          * would have already happened in close and is redundant. */
4474         e1000_release_hw_control(adapter);
4475
4476         pci_disable_device(pdev);
4477
4478         retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4479         if (retval)
4480                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4481
4482         return 0;
4483 }
4484
4485 #ifdef CONFIG_PM
4486 static int
4487 e1000_resume(struct pci_dev *pdev)
4488 {
4489         struct net_device *netdev = pci_get_drvdata(pdev);
4490         struct e1000_adapter *adapter = netdev_priv(netdev);
4491         int retval;
4492         uint32_t manc, ret_val;
4493
4494         retval = pci_set_power_state(pdev, PCI_D0);
4495         if (retval)
4496                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4497         e1000_pci_restore_state(adapter);
4498         ret_val = pci_enable_device(pdev);
4499         pci_set_master(pdev);
4500
4501         retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4502         if (retval)
4503                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4504         retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4505         if (retval)
4506                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4507
4508         e1000_reset(adapter);
4509         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4510
4511         if (netif_running(netdev))
4512                 e1000_up(adapter);
4513
4514         netif_device_attach(netdev);
4515
4516         if (adapter->hw.mac_type >= e1000_82540 &&
4517            adapter->hw.media_type == e1000_media_type_copper) {
4518                 manc = E1000_READ_REG(&adapter->hw, MANC);
4519                 manc &= ~(E1000_MANC_ARP_EN);
4520                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4521         }
4522
4523         /* If the controller is 82573 and f/w is AMT, do not set
4524          * DRV_LOAD until the interface is up.  For all other cases,
4525          * let the f/w know that the h/w is now under the control
4526          * of the driver. */
4527         if (adapter->hw.mac_type != e1000_82573 ||
4528             !e1000_check_mng_mode(&adapter->hw))
4529                 e1000_get_hw_control(adapter);
4530
4531         return 0;
4532 }
4533 #endif
4534 #ifdef CONFIG_NET_POLL_CONTROLLER
4535 /*
4536  * Polling 'interrupt' - used by things like netconsole to send skbs
4537  * without having to re-enable interrupts. It's not called while
4538  * the interrupt routine is executing.
4539  */
4540 static void
4541 e1000_netpoll(struct net_device *netdev)
4542 {
4543         struct e1000_adapter *adapter = netdev_priv(netdev);
4544         disable_irq(adapter->pdev->irq);
4545         e1000_intr(adapter->pdev->irq, netdev, NULL);
4546         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4547 #ifndef CONFIG_E1000_NAPI
4548         adapter->clean_rx(adapter, adapter->rx_ring);
4549 #endif
4550         enable_irq(adapter->pdev->irq);
4551 }
4552 #endif
4553
4554 /* e1000_main.c */