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

   1 /*******************************************************************************
   2
   3
   4   Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU General Public License as published by the Free
   8   Software Foundation; either version 2 of the License, or (at your option)
   9   any later version.
  10
  11   This program is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14   more details.
  15
  16   You should have received a copy of the GNU General Public License along with
  17   this program; if not, write to the Free Software Foundation, Inc., 59
  18   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20   The full GNU General Public License is included in this distribution in the
  21   file called LICENSE.
  22
  23   Contact Information:
  24   Linux NICS <linux.nics@intel.com>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30
  31 /* Change Log
  32  * 6.3.9        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  * 6.2.1        7/21/05
  92  *   o Performance tweaks, including copybreak and prefetch
  93  * 6.1.2        4/13/05
  94  *   o Fixed ethtool diagnostics
  95  *   o Enabled flow control to take default eeprom settings
  96  *   o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
  97  *     calls, one from mii_ioctl and other from within update_stats while
  98  *     processing MIIREG ioctl.
  99  */
 100
 101 char e1000_driver_name[] = "e1000";
 102 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
 103 #ifndef CONFIG_E1000_NAPI
 104 #define DRIVERNAPI
 105 #else
 106 #define DRIVERNAPI "-NAPI"
 107 #endif
 108 #define DRV_VERSION "6.3.9-k2"DRIVERNAPI
 109 char e1000_driver_version[] = DRV_VERSION;
 110 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
 111
 112 /* e1000_pci_tbl - PCI Device ID Table
 113  *
 114  * Last entry must be all 0s
 115  *
 116  * Macro expands to...
 117  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
 118  */
 119 static struct pci_device_id e1000_pci_tbl[] = {
 120         INTEL_E1000_ETHERNET_DEVICE(0x1000),
 121         INTEL_E1000_ETHERNET_DEVICE(0x1001),
 122         INTEL_E1000_ETHERNET_DEVICE(0x1004),
 123         INTEL_E1000_ETHERNET_DEVICE(0x1008),
 124         INTEL_E1000_ETHERNET_DEVICE(0x1009),
 125         INTEL_E1000_ETHERNET_DEVICE(0x100C),
 126         INTEL_E1000_ETHERNET_DEVICE(0x100D),
 127         INTEL_E1000_ETHERNET_DEVICE(0x100E),
 128         INTEL_E1000_ETHERNET_DEVICE(0x100F),
 129         INTEL_E1000_ETHERNET_DEVICE(0x1010),
 130         INTEL_E1000_ETHERNET_DEVICE(0x1011),
 131         INTEL_E1000_ETHERNET_DEVICE(0x1012),
 132         INTEL_E1000_ETHERNET_DEVICE(0x1013),
 133         INTEL_E1000_ETHERNET_DEVICE(0x1014),
 134         INTEL_E1000_ETHERNET_DEVICE(0x1015),
 135         INTEL_E1000_ETHERNET_DEVICE(0x1016),
 136         INTEL_E1000_ETHERNET_DEVICE(0x1017),
 137         INTEL_E1000_ETHERNET_DEVICE(0x1018),
 138         INTEL_E1000_ETHERNET_DEVICE(0x1019),
 139         INTEL_E1000_ETHERNET_DEVICE(0x101A),
 140         INTEL_E1000_ETHERNET_DEVICE(0x101D),
 141         INTEL_E1000_ETHERNET_DEVICE(0x101E),
 142         INTEL_E1000_ETHERNET_DEVICE(0x1026),
 143         INTEL_E1000_ETHERNET_DEVICE(0x1027),
 144         INTEL_E1000_ETHERNET_DEVICE(0x1028),
 145         INTEL_E1000_ETHERNET_DEVICE(0x105E),
 146         INTEL_E1000_ETHERNET_DEVICE(0x105F),
 147         INTEL_E1000_ETHERNET_DEVICE(0x1060),
 148         INTEL_E1000_ETHERNET_DEVICE(0x1075),
 149         INTEL_E1000_ETHERNET_DEVICE(0x1076),
 150         INTEL_E1000_ETHERNET_DEVICE(0x1077),
 151         INTEL_E1000_ETHERNET_DEVICE(0x1078),
 152         INTEL_E1000_ETHERNET_DEVICE(0x1079),
 153         INTEL_E1000_ETHERNET_DEVICE(0x107A),
 154         INTEL_E1000_ETHERNET_DEVICE(0x107B),
 155         INTEL_E1000_ETHERNET_DEVICE(0x107C),
 156         INTEL_E1000_ETHERNET_DEVICE(0x107D),
 157         INTEL_E1000_ETHERNET_DEVICE(0x107E),
 158         INTEL_E1000_ETHERNET_DEVICE(0x107F),
 159         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 160         INTEL_E1000_ETHERNET_DEVICE(0x108B),
 161         INTEL_E1000_ETHERNET_DEVICE(0x108C),
 162         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 163         INTEL_E1000_ETHERNET_DEVICE(0x109A),
 164         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 165         /* required last entry */
 166         {0,}
 167 };
 168
 169 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 170
 171 int e1000_up(struct e1000_adapter *adapter);
 172 void e1000_down(struct e1000_adapter *adapter);
 173 void e1000_reset(struct e1000_adapter *adapter);
 174 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 175 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 176 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 177 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 178 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 179 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 180                                     struct e1000_tx_ring *txdr);
 181 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 182                                     struct e1000_rx_ring *rxdr);
 183 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 184                                     struct e1000_tx_ring *tx_ring);
 185 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 186                                     struct e1000_rx_ring *rx_ring);
 187 void e1000_update_stats(struct e1000_adapter *adapter);
 188
 189 /* Local Function Prototypes */
 190
 191 static int e1000_init_module(void);
 192 static void e1000_exit_module(void);
 193 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 194 static void __devexit e1000_remove(struct pci_dev *pdev);
 195 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 196 #ifdef CONFIG_E1000_MQ
 197 static void e1000_setup_queue_mapping(struct e1000_adapter *adapter);
 198 #endif
 199 static int e1000_sw_init(struct e1000_adapter *adapter);
 200 static int e1000_open(struct net_device *netdev);
 201 static int e1000_close(struct net_device *netdev);
 202 static void e1000_configure_tx(struct e1000_adapter *adapter);
 203 static void e1000_configure_rx(struct e1000_adapter *adapter);
 204 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 205 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 206 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 207 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 208                                 struct e1000_tx_ring *tx_ring);
 209 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 210                                 struct e1000_rx_ring *rx_ring);
 211 static void e1000_set_multi(struct net_device *netdev);
 212 static void e1000_update_phy_info(unsigned long data);
 213 static void e1000_watchdog(unsigned long data);
 214 static void e1000_watchdog_task(struct e1000_adapter *adapter);
 215 static void e1000_82547_tx_fifo_stall(unsigned long data);
 216 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 217 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 218 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 219 static int e1000_set_mac(struct net_device *netdev, void *p);
 220 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
 221 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
 222                                     struct e1000_tx_ring *tx_ring);
 223 #ifdef CONFIG_E1000_NAPI
 224 static int e1000_clean(struct net_device *poll_dev, int *budget);
 225 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 226                                     struct e1000_rx_ring *rx_ring,
 227                                     int *work_done, int work_to_do);
 228 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 229                                        struct e1000_rx_ring *rx_ring,
 230                                        int *work_done, int work_to_do);
 231 #else
 232 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
 233                                     struct e1000_rx_ring *rx_ring);
 234 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 235                                        struct e1000_rx_ring *rx_ring);
 236 #endif
 237 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 238                                    struct e1000_rx_ring *rx_ring,
 239                                    int cleaned_count);
 240 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 241                                       struct e1000_rx_ring *rx_ring,
 242                                       int cleaned_count);
 243 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 244 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 245                            int cmd);
 246 void e1000_set_ethtool_ops(struct net_device *netdev);
 247 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 248 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 249 static void e1000_tx_timeout(struct net_device *dev);
 250 static void e1000_tx_timeout_task(struct net_device *dev);
 251 static void e1000_smartspeed(struct e1000_adapter *adapter);
 252 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 253                                               struct sk_buff *skb);
 254
 255 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 256 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 257 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 258 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 259
 260 #ifdef CONFIG_PM
 261 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 262 static int e1000_resume(struct pci_dev *pdev);
 263 #endif
 264
 265 #ifdef CONFIG_NET_POLL_CONTROLLER
 266 /* for netdump / net console */
 267 static void e1000_netpoll (struct net_device *netdev);
 268 #endif
 269
 270 #ifdef CONFIG_E1000_MQ
 271 /* for multiple Rx queues */
 272 void e1000_rx_schedule(void *data);
 273 #endif
 274
 275 /* Exported from other modules */
 276
 277 extern void e1000_check_options(struct e1000_adapter *adapter);
 278
 279 static struct pci_driver e1000_driver = {
 280         .name     = e1000_driver_name,
 281         .id_table = e1000_pci_tbl,
 282         .probe    = e1000_probe,
 283         .remove   = __devexit_p(e1000_remove),
 284         /* Power Managment Hooks */
 285 #ifdef CONFIG_PM
 286         .suspend  = e1000_suspend,
 287         .resume   = e1000_resume
 288 #endif
 289 };
 290
 291 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 292 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 293 MODULE_LICENSE("GPL");
 294 MODULE_VERSION(DRV_VERSION);
 295
 296 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 297 module_param(debug, int, 0);
 298 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 299
 300 /**
 301  * e1000_init_module - Driver Registration Routine
 302  *
 303  * e1000_init_module is the first routine called when the driver is
 304  * loaded. All it does is register with the PCI subsystem.
 305  **/
 306
 307 static int __init
 308 e1000_init_module(void)
 309 {
 310         int ret;
 311         printk(KERN_INFO "%s - version %s\n",
 312                e1000_driver_string, e1000_driver_version);
 313
 314         printk(KERN_INFO "%s\n", e1000_copyright);
 315
 316         ret = pci_module_init(&e1000_driver);
 317
 318         return ret;
 319 }
 320
 321 module_init(e1000_init_module);
 322
 323 /**
 324  * e1000_exit_module - Driver Exit Cleanup Routine
 325  *
 326  * e1000_exit_module is called just before the driver is removed
 327  * from memory.
 328  **/
 329
 330 static void __exit
 331 e1000_exit_module(void)
 332 {
 333         pci_unregister_driver(&e1000_driver);
 334 }
 335
 336 module_exit(e1000_exit_module);
 337
 338 /**
 339  * e1000_irq_disable - Mask off interrupt generation on the NIC
 340  * @adapter: board private structure
 341  **/
 342
 343 static inline void
 344 e1000_irq_disable(struct e1000_adapter *adapter)
 345 {
 346         atomic_inc(&adapter->irq_sem);
 347         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 348         E1000_WRITE_FLUSH(&adapter->hw);
 349         synchronize_irq(adapter->pdev->irq);
 350 }
 351
 352 /**
 353  * e1000_irq_enable - Enable default interrupt generation settings
 354  * @adapter: board private structure
 355  **/
 356
 357 static inline void
 358 e1000_irq_enable(struct e1000_adapter *adapter)
 359 {
 360         if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
 361                 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 362                 E1000_WRITE_FLUSH(&adapter->hw);
 363         }
 364 }
 365
 366 static void
 367 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 368 {
 369         struct net_device *netdev = adapter->netdev;
 370         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 371         uint16_t old_vid = adapter->mng_vlan_id;
 372         if (adapter->vlgrp) {
 373                 if (!adapter->vlgrp->vlan_devices[vid]) {
 374                         if (adapter->hw.mng_cookie.status &
 375                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 376                                 e1000_vlan_rx_add_vid(netdev, vid);
 377                                 adapter->mng_vlan_id = vid;
 378                         } else
 379                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 380
 381                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 382                                         (vid != old_vid) &&
 383                                         !adapter->vlgrp->vlan_devices[old_vid])
 384                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 385                 }
 386         }
 387 }
 388
 389 /**
 390  * e1000_release_hw_control - release control of the h/w to f/w
 391  * @adapter: address of board private structure
 392  *
 393  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 394  * For ASF and Pass Through versions of f/w this means that the
 395  * driver is no longer loaded. For AMT version (only with 82573) i
 396  * of the f/w this means that the netowrk i/f is closed.
 397  *
 398  **/
 399
 400 static inline void
 401 e1000_release_hw_control(struct e1000_adapter *adapter)
 402 {
 403         uint32_t ctrl_ext;
 404         uint32_t swsm;
 405
 406         /* Let firmware taken over control of h/w */
 407         switch (adapter->hw.mac_type) {
 408         case e1000_82571:
 409         case e1000_82572:
 410                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 411                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 412                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 413                 break;
 414         case e1000_82573:
 415                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 416                 E1000_WRITE_REG(&adapter->hw, SWSM,
 417                                 swsm & ~E1000_SWSM_DRV_LOAD);
 418         default:
 419                 break;
 420         }
 421 }
 422
 423 /**
 424  * e1000_get_hw_control - get control of the h/w from f/w
 425  * @adapter: address of board private structure
 426  *
 427  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 428  * For ASF and Pass Through versions of f/w this means that
 429  * the driver is loaded. For AMT version (only with 82573)
 430  * of the f/w this means that the netowrk i/f is open.
 431  *
 432  **/
 433
 434 static inline void
 435 e1000_get_hw_control(struct e1000_adapter *adapter)
 436 {
 437         uint32_t ctrl_ext;
 438         uint32_t swsm;
 439         /* Let firmware know the driver has taken over */
 440         switch (adapter->hw.mac_type) {
 441         case e1000_82571:
 442         case e1000_82572:
 443                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 444                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 445                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 446                 break;
 447         case e1000_82573:
 448                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 449                 E1000_WRITE_REG(&adapter->hw, SWSM,
 450                                 swsm | E1000_SWSM_DRV_LOAD);
 451                 break;
 452         default:
 453                 break;
 454         }
 455 }
 456
 457 int
 458 e1000_up(struct e1000_adapter *adapter)
 459 {
 460         struct net_device *netdev = adapter->netdev;
 461         int i, err;
 462
 463         /* hardware has been reset, we need to reload some things */
 464
 465         /* Reset the PHY if it was previously powered down */
 466         if (adapter->hw.media_type == e1000_media_type_copper) {
 467                 uint16_t mii_reg;
 468                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 469                 if (mii_reg & MII_CR_POWER_DOWN)
 470                         e1000_phy_reset(&adapter->hw);
 471         }
 472
 473         e1000_set_multi(netdev);
 474
 475         e1000_restore_vlan(adapter);
 476
 477         e1000_configure_tx(adapter);
 478         e1000_setup_rctl(adapter);
 479         e1000_configure_rx(adapter);
 480         /* call E1000_DESC_UNUSED which always leaves
 481          * at least 1 descriptor unused to make sure
 482          * next_to_use != next_to_clean */
 483         for (i = 0; i < adapter->num_rx_queues; i++) {
 484                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 485                 adapter->alloc_rx_buf(adapter, ring,
 486                                       E1000_DESC_UNUSED(ring));
 487         }
 488
 489 #ifdef CONFIG_PCI_MSI
 490         if (adapter->hw.mac_type > e1000_82547_rev_2) {
 491                 adapter->have_msi = TRUE;
 492                 if ((err = pci_enable_msi(adapter->pdev))) {
 493                         DPRINTK(PROBE, ERR,
 494                          "Unable to allocate MSI interrupt Error: %d\n", err);
 495                         adapter->have_msi = FALSE;
 496                 }
 497         }
 498 #endif
 499         if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
 500                               SA_SHIRQ | SA_SAMPLE_RANDOM,
 501                               netdev->name, netdev))) {
 502                 DPRINTK(PROBE, ERR,
 503                     "Unable to allocate interrupt Error: %d\n", err);
 504                 return err;
 505         }
 506
 507 #ifdef CONFIG_E1000_MQ
 508         e1000_setup_queue_mapping(adapter);
 509 #endif
 510
 511         adapter->tx_queue_len = netdev->tx_queue_len;
 512
 513         mod_timer(&adapter->watchdog_timer, jiffies);
 514
 515 #ifdef CONFIG_E1000_NAPI
 516         netif_poll_enable(netdev);
 517 #endif
 518         e1000_irq_enable(adapter);
 519
 520         return 0;
 521 }
 522
 523 void
 524 e1000_down(struct e1000_adapter *adapter)
 525 {
 526         struct net_device *netdev = adapter->netdev;
 527         boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
 528                                      e1000_check_mng_mode(&adapter->hw);
 529
 530         e1000_irq_disable(adapter);
 531 #ifdef CONFIG_E1000_MQ
 532         while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
 533 #endif
 534         free_irq(adapter->pdev->irq, netdev);
 535 #ifdef CONFIG_PCI_MSI
 536         if (adapter->hw.mac_type > e1000_82547_rev_2 &&
 537            adapter->have_msi == TRUE)
 538                 pci_disable_msi(adapter->pdev);
 539 #endif
 540         del_timer_sync(&adapter->tx_fifo_stall_timer);
 541         del_timer_sync(&adapter->watchdog_timer);
 542         del_timer_sync(&adapter->phy_info_timer);
 543
 544 #ifdef CONFIG_E1000_NAPI
 545         netif_poll_disable(netdev);
 546 #endif
 547         netdev->tx_queue_len = adapter->tx_queue_len;
 548         adapter->link_speed = 0;
 549         adapter->link_duplex = 0;
 550         netif_carrier_off(netdev);
 551         netif_stop_queue(netdev);
 552
 553         e1000_reset(adapter);
 554         e1000_clean_all_tx_rings(adapter);
 555         e1000_clean_all_rx_rings(adapter);
 556
 557         /* Power down the PHY so no link is implied when interface is down *
 558          * The PHY cannot be powered down if any of the following is TRUE *
 559          * (a) WoL is enabled
 560          * (b) AMT is active
 561          * (c) SoL/IDER session is active */
 562         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 563            adapter->hw.media_type == e1000_media_type_copper &&
 564            !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
 565            !mng_mode_enabled &&
 566            !e1000_check_phy_reset_block(&adapter->hw)) {
 567                 uint16_t mii_reg;
 568                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 569                 mii_reg |= MII_CR_POWER_DOWN;
 570                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 571                 mdelay(1);
 572         }
 573 }
 574
 575 void
 576 e1000_reset(struct e1000_adapter *adapter)
 577 {
 578         uint32_t pba, manc;
 579         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 580
 581         /* Repartition Pba for greater than 9k mtu
 582          * To take effect CTRL.RST is required.
 583          */
 584
 585         switch (adapter->hw.mac_type) {
 586         case e1000_82547:
 587         case e1000_82547_rev_2:
 588                 pba = E1000_PBA_30K;
 589                 break;
 590         case e1000_82571:
 591         case e1000_82572:
 592                 pba = E1000_PBA_38K;
 593                 break;
 594         case e1000_82573:
 595                 pba = E1000_PBA_12K;
 596                 break;
 597         default:
 598                 pba = E1000_PBA_48K;
 599                 break;
 600         }
 601
 602         if ((adapter->hw.mac_type != e1000_82573) &&
 603            (adapter->netdev->mtu > E1000_RXBUFFER_8192))
 604                 pba -= 8; /* allocate more FIFO for Tx */
 605
 606
 607         if (adapter->hw.mac_type == e1000_82547) {
 608                 adapter->tx_fifo_head = 0;
 609                 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 610                 adapter->tx_fifo_size =
 611                         (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 612                 atomic_set(&adapter->tx_fifo_stall, 0);
 613         }
 614
 615         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 616
 617         /* flow control settings */
 618         /* Set the FC high water mark to 90% of the FIFO size.
 619          * Required to clear last 3 LSB */
 620         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 621
 622         adapter->hw.fc_high_water = fc_high_water_mark;
 623         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 624         adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 625         adapter->hw.fc_send_xon = 1;
 626         adapter->hw.fc = adapter->hw.original_fc;
 627
 628         /* Allow time for pending master requests to run */
 629         e1000_reset_hw(&adapter->hw);
 630         if (adapter->hw.mac_type >= e1000_82544)
 631                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 632         if (e1000_init_hw(&adapter->hw))
 633                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 634         e1000_update_mng_vlan(adapter);
 635         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 636         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 637
 638         e1000_reset_adaptive(&adapter->hw);
 639         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 640         if (adapter->en_mng_pt) {
 641                 manc = E1000_READ_REG(&adapter->hw, MANC);
 642                 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
 643                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 644         }
 645 }
 646
 647 /**
 648  * e1000_probe - Device Initialization Routine
 649  * @pdev: PCI device information struct
 650  * @ent: entry in e1000_pci_tbl
 651  *
 652  * Returns 0 on success, negative on failure
 653  *
 654  * e1000_probe initializes an adapter identified by a pci_dev structure.
 655  * The OS initialization, configuring of the adapter private structure,
 656  * and a hardware reset occur.
 657  **/
 658
 659 static int __devinit
 660 e1000_probe(struct pci_dev *pdev,
 661             const struct pci_device_id *ent)
 662 {
 663         struct net_device *netdev;
 664         struct e1000_adapter *adapter;
 665         unsigned long mmio_start, mmio_len;
 666
 667         static int cards_found = 0;
 668         int i, err, pci_using_dac;
 669         uint16_t eeprom_data;
 670         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 671         if ((err = pci_enable_device(pdev)))
 672                 return err;
 673
 674         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
 675                 pci_using_dac = 1;
 676         } else {
 677                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
 678                         E1000_ERR("No usable DMA configuration, aborting\n");
 679                         return err;
 680                 }
 681                 pci_using_dac = 0;
 682         }
 683
 684         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 685                 return err;
 686
 687         pci_set_master(pdev);
 688
 689         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 690         if (!netdev) {
 691                 err = -ENOMEM;
 692                 goto err_alloc_etherdev;
 693         }
 694
 695         SET_MODULE_OWNER(netdev);
 696         SET_NETDEV_DEV(netdev, &pdev->dev);
 697
 698         pci_set_drvdata(pdev, netdev);
 699         adapter = netdev_priv(netdev);
 700         adapter->netdev = netdev;
 701         adapter->pdev = pdev;
 702         adapter->hw.back = adapter;
 703         adapter->msg_enable = (1 << debug) - 1;
 704
 705         mmio_start = pci_resource_start(pdev, BAR_0);
 706         mmio_len = pci_resource_len(pdev, BAR_0);
 707
 708         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 709         if (!adapter->hw.hw_addr) {
 710                 err = -EIO;
 711                 goto err_ioremap;
 712         }
 713
 714         for (i = BAR_1; i <= BAR_5; i++) {
 715                 if (pci_resource_len(pdev, i) == 0)
 716                         continue;
 717                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 718                         adapter->hw.io_base = pci_resource_start(pdev, i);
 719                         break;
 720                 }
 721         }
 722
 723         netdev->open = &e1000_open;
 724         netdev->stop = &e1000_close;
 725         netdev->hard_start_xmit = &e1000_xmit_frame;
 726         netdev->get_stats = &e1000_get_stats;
 727         netdev->set_multicast_list = &e1000_set_multi;
 728         netdev->set_mac_address = &e1000_set_mac;
 729         netdev->change_mtu = &e1000_change_mtu;
 730         netdev->do_ioctl = &e1000_ioctl;
 731         e1000_set_ethtool_ops(netdev);
 732         netdev->tx_timeout = &e1000_tx_timeout;
 733         netdev->watchdog_timeo = 5 * HZ;
 734 #ifdef CONFIG_E1000_NAPI
 735         netdev->poll = &e1000_clean;
 736         netdev->weight = 64;
 737 #endif
 738         netdev->vlan_rx_register = e1000_vlan_rx_register;
 739         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 740         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 741 #ifdef CONFIG_NET_POLL_CONTROLLER
 742         netdev->poll_controller = e1000_netpoll;
 743 #endif
 744         strcpy(netdev->name, pci_name(pdev));
 745
 746         netdev->mem_start = mmio_start;
 747         netdev->mem_end = mmio_start + mmio_len;
 748         netdev->base_addr = adapter->hw.io_base;
 749
 750         adapter->bd_number = cards_found;
 751
 752         /* setup the private structure */
 753
 754         if ((err = e1000_sw_init(adapter)))
 755                 goto err_sw_init;
 756
 757         if ((err = e1000_check_phy_reset_block(&adapter->hw)))
 758                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
 759
 760         if (adapter->hw.mac_type >= e1000_82543) {
 761                 netdev->features = NETIF_F_SG |
 762                                    NETIF_F_HW_CSUM |
 763                                    NETIF_F_HW_VLAN_TX |
 764                                    NETIF_F_HW_VLAN_RX |
 765                                    NETIF_F_HW_VLAN_FILTER;
 766         }
 767
 768 #ifdef NETIF_F_TSO
 769         if ((adapter->hw.mac_type >= e1000_82544) &&
 770            (adapter->hw.mac_type != e1000_82547))
 771                 netdev->features |= NETIF_F_TSO;
 772
 773 #ifdef NETIF_F_TSO_IPV6
 774         if (adapter->hw.mac_type > e1000_82547_rev_2)
 775                 netdev->features |= NETIF_F_TSO_IPV6;
 776 #endif
 777 #endif
 778         if (pci_using_dac)
 779                 netdev->features |= NETIF_F_HIGHDMA;
 780
 781         /* hard_start_xmit is safe against parallel locking */
 782         netdev->features |= NETIF_F_LLTX;
 783
 784         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
 785
 786         /* before reading the EEPROM, reset the controller to
 787          * put the device in a known good starting state */
 788
 789         e1000_reset_hw(&adapter->hw);
 790
 791         /* make sure the EEPROM is good */
 792
 793         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
 794                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
 795                 err = -EIO;
 796                 goto err_eeprom;
 797         }
 798
 799         /* copy the MAC address out of the EEPROM */
 800
 801         if (e1000_read_mac_addr(&adapter->hw))
 802                 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
 803         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
 804         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
 805
 806         if (!is_valid_ether_addr(netdev->perm_addr)) {
 807                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
 808                 err = -EIO;
 809                 goto err_eeprom;
 810         }
 811
 812         e1000_read_part_num(&adapter->hw, &(adapter->part_num));
 813
 814         e1000_get_bus_info(&adapter->hw);
 815
 816         init_timer(&adapter->tx_fifo_stall_timer);
 817         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
 818         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
 819
 820         init_timer(&adapter->watchdog_timer);
 821         adapter->watchdog_timer.function = &e1000_watchdog;
 822         adapter->watchdog_timer.data = (unsigned long) adapter;
 823
 824         INIT_WORK(&adapter->watchdog_task,
 825                 (void (*)(void *))e1000_watchdog_task, adapter);
 826
 827         init_timer(&adapter->phy_info_timer);
 828         adapter->phy_info_timer.function = &e1000_update_phy_info;
 829         adapter->phy_info_timer.data = (unsigned long) adapter;
 830
 831         INIT_WORK(&adapter->tx_timeout_task,
 832                 (void (*)(void *))e1000_tx_timeout_task, netdev);
 833
 834         /* we're going to reset, so assume we have no link for now */
 835
 836         netif_carrier_off(netdev);
 837         netif_stop_queue(netdev);
 838
 839         e1000_check_options(adapter);
 840
 841         /* Initial Wake on LAN setting
 842          * If APM wake is enabled in the EEPROM,
 843          * enable the ACPI Magic Packet filter
 844          */
 845
 846         switch (adapter->hw.mac_type) {
 847         case e1000_82542_rev2_0:
 848         case e1000_82542_rev2_1:
 849         case e1000_82543:
 850                 break;
 851         case e1000_82544:
 852                 e1000_read_eeprom(&adapter->hw,
 853                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
 854                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
 855                 break;
 856         case e1000_82546:
 857         case e1000_82546_rev_3:
 858         case e1000_82571:
 859                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
 860                         e1000_read_eeprom(&adapter->hw,
 861                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
 862                         break;
 863                 }
 864                 /* Fall Through */
 865         default:
 866                 e1000_read_eeprom(&adapter->hw,
 867                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
 868                 break;
 869         }
 870         if (eeprom_data & eeprom_apme_mask)
 871                 adapter->wol |= E1000_WUFC_MAG;
 872
 873         /* print bus type/speed/width info */
 874         {
 875         struct e1000_hw *hw = &adapter->hw;
 876         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
 877                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
 878                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
 879                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
 880                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
 881                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
 882                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
 883                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
 884                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
 885                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
 886                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
 887                  "32-bit"));
 888         }
 889
 890         for (i = 0; i < 6; i++)
 891                 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
 892
 893         /* reset the hardware with the new settings */
 894         e1000_reset(adapter);
 895
 896         /* If the controller is 82573 and f/w is AMT, do not set
 897          * DRV_LOAD until the interface is up.  For all other cases,
 898          * let the f/w know that the h/w is now under the control
 899          * of the driver. */
 900         if (adapter->hw.mac_type != e1000_82573 ||
 901             !e1000_check_mng_mode(&adapter->hw))
 902                 e1000_get_hw_control(adapter);
 903
 904         strcpy(netdev->name, "eth%d");
 905         if ((err = register_netdev(netdev)))
 906                 goto err_register;
 907
 908         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
 909
 910         cards_found++;
 911         return 0;
 912
 913 err_register:
 914 err_sw_init:
 915 err_eeprom:
 916         iounmap(adapter->hw.hw_addr);
 917 err_ioremap:
 918         free_netdev(netdev);
 919 err_alloc_etherdev:
 920         pci_release_regions(pdev);
 921         return err;
 922 }
 923
 924 /**
 925  * e1000_remove - Device Removal Routine
 926  * @pdev: PCI device information struct
 927  *
 928  * e1000_remove is called by the PCI subsystem to alert the driver
 929  * that it should release a PCI device.  The could be caused by a
 930  * Hot-Plug event, or because the driver is going to be removed from
 931  * memory.
 932  **/
 933
 934 static void __devexit
 935 e1000_remove(struct pci_dev *pdev)
 936 {
 937         struct net_device *netdev = pci_get_drvdata(pdev);
 938         struct e1000_adapter *adapter = netdev_priv(netdev);
 939         uint32_t manc;
 940 #ifdef CONFIG_E1000_NAPI
 941         int i;
 942 #endif
 943
 944         flush_scheduled_work();
 945
 946         if (adapter->hw.mac_type >= e1000_82540 &&
 947            adapter->hw.media_type == e1000_media_type_copper) {
 948                 manc = E1000_READ_REG(&adapter->hw, MANC);
 949                 if (manc & E1000_MANC_SMBUS_EN) {
 950                         manc |= E1000_MANC_ARP_EN;
 951                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
 952                 }
 953         }
 954
 955         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
 956          * would have already happened in close and is redundant. */
 957         e1000_release_hw_control(adapter);
 958
 959         unregister_netdev(netdev);
 960 #ifdef CONFIG_E1000_NAPI
 961         for (i = 0; i < adapter->num_rx_queues; i++)
 962                 __dev_put(&adapter->polling_netdev[i]);
 963 #endif
 964
 965         if (!e1000_check_phy_reset_block(&adapter->hw))
 966                 e1000_phy_hw_reset(&adapter->hw);
 967
 968         kfree(adapter->tx_ring);
 969         kfree(adapter->rx_ring);
 970 #ifdef CONFIG_E1000_NAPI
 971         kfree(adapter->polling_netdev);
 972 #endif
 973
 974         iounmap(adapter->hw.hw_addr);
 975         pci_release_regions(pdev);
 976
 977 #ifdef CONFIG_E1000_MQ
 978         free_percpu(adapter->cpu_netdev);
 979         free_percpu(adapter->cpu_tx_ring);
 980 #endif
 981         free_netdev(netdev);
 982
 983         pci_disable_device(pdev);
 984 }
 985
 986 /**
 987  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 988  * @adapter: board private structure to initialize
 989  *
 990  * e1000_sw_init initializes the Adapter private data structure.
 991  * Fields are initialized based on PCI device information and
 992  * OS network device settings (MTU size).
 993  **/
 994
 995 static int __devinit
 996 e1000_sw_init(struct e1000_adapter *adapter)
 997 {
 998         struct e1000_hw *hw = &adapter->hw;
 999         struct net_device *netdev = adapter->netdev;
1000         struct pci_dev *pdev = adapter->pdev;
1001 #ifdef CONFIG_E1000_NAPI
1002         int i;
1003 #endif
1004
1005         /* PCI config space info */
1006
1007         hw->vendor_id = pdev->vendor;
1008         hw->device_id = pdev->device;
1009         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1010         hw->subsystem_id = pdev->subsystem_device;
1011
1012         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1013
1014         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1015
1016         adapter->rx_buffer_len = E1000_RXBUFFER_2048;
1017         adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
1018         hw->max_frame_size = netdev->mtu +
1019                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1020         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1021
1022         /* identify the MAC */
1023
1024         if (e1000_set_mac_type(hw)) {
1025                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1026                 return -EIO;
1027         }
1028
1029         /* initialize eeprom parameters */
1030
1031         if (e1000_init_eeprom_params(hw)) {
1032                 E1000_ERR("EEPROM initialization failed\n");
1033                 return -EIO;
1034         }
1035
1036         switch (hw->mac_type) {
1037         default:
1038                 break;
1039         case e1000_82541:
1040         case e1000_82547:
1041         case e1000_82541_rev_2:
1042         case e1000_82547_rev_2:
1043                 hw->phy_init_script = 1;
1044                 break;
1045         }
1046
1047         e1000_set_media_type(hw);
1048
1049         hw->wait_autoneg_complete = FALSE;
1050         hw->tbi_compatibility_en = TRUE;
1051         hw->adaptive_ifs = TRUE;
1052
1053         /* Copper options */
1054
1055         if (hw->media_type == e1000_media_type_copper) {
1056                 hw->mdix = AUTO_ALL_MODES;
1057                 hw->disable_polarity_correction = FALSE;
1058                 hw->master_slave = E1000_MASTER_SLAVE;
1059         }
1060
1061 #ifdef CONFIG_E1000_MQ
1062         /* Number of supported queues */
1063         switch (hw->mac_type) {
1064         case e1000_82571:
1065         case e1000_82572:
1066                 /* These controllers support 2 tx queues, but with a single
1067                  * qdisc implementation, multiple tx queues aren't quite as
1068                  * interesting.  If we can find a logical way of mapping
1069                  * flows to a queue, then perhaps we can up the num_tx_queue
1070                  * count back to its default.  Until then, we run the risk of
1071                  * terrible performance due to SACK overload. */
1072                 adapter->num_tx_queues = 1;
1073                 adapter->num_rx_queues = 2;
1074                 break;
1075         default:
1076                 adapter->num_tx_queues = 1;
1077                 adapter->num_rx_queues = 1;
1078                 break;
1079         }
1080         adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
1081         adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
1082         DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
1083                 adapter->num_rx_queues,
1084                 ((adapter->num_rx_queues == 1)
1085                  ? ((num_online_cpus() > 1)
1086                         ? "(due to unsupported feature in current adapter)"
1087                         : "(due to unsupported system configuration)")
1088                  : ""));
1089         DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
1090                 adapter->num_tx_queues);
1091 #else
1092         adapter->num_tx_queues = 1;
1093         adapter->num_rx_queues = 1;
1094 #endif
1095
1096         if (e1000_alloc_queues(adapter)) {
1097                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1098                 return -ENOMEM;
1099         }
1100
1101 #ifdef CONFIG_E1000_NAPI
1102         for (i = 0; i < adapter->num_rx_queues; i++) {
1103                 adapter->polling_netdev[i].priv = adapter;
1104                 adapter->polling_netdev[i].poll = &e1000_clean;
1105                 adapter->polling_netdev[i].weight = 64;
1106                 dev_hold(&adapter->polling_netdev[i]);
1107                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1108         }
1109         spin_lock_init(&adapter->tx_queue_lock);
1110 #endif
1111
1112         atomic_set(&adapter->irq_sem, 1);
1113         spin_lock_init(&adapter->stats_lock);
1114
1115         return 0;
1116 }
1117
1118 /**
1119  * e1000_alloc_queues - Allocate memory for all rings
1120  * @adapter: board private structure to initialize
1121  *
1122  * We allocate one ring per queue at run-time since we don't know the
1123  * number of queues at compile-time.  The polling_netdev array is
1124  * intended for Multiqueue, but should work fine with a single queue.
1125  **/
1126
1127 static int __devinit
1128 e1000_alloc_queues(struct e1000_adapter *adapter)
1129 {
1130         int size;
1131
1132         size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1133         adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1134         if (!adapter->tx_ring)
1135                 return -ENOMEM;
1136         memset(adapter->tx_ring, 0, size);
1137
1138         size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1139         adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1140         if (!adapter->rx_ring) {
1141                 kfree(adapter->tx_ring);
1142                 return -ENOMEM;
1143         }
1144         memset(adapter->rx_ring, 0, size);
1145
1146 #ifdef CONFIG_E1000_NAPI
1147         size = sizeof(struct net_device) * adapter->num_rx_queues;
1148         adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1149         if (!adapter->polling_netdev) {
1150                 kfree(adapter->tx_ring);
1151                 kfree(adapter->rx_ring);
1152                 return -ENOMEM;
1153         }
1154         memset(adapter->polling_netdev, 0, size);
1155 #endif
1156
1157 #ifdef CONFIG_E1000_MQ
1158         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1159         adapter->rx_sched_call_data.info = adapter->netdev;
1160
1161         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1162         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1163 #endif
1164
1165         return E1000_SUCCESS;
1166 }
1167
1168 #ifdef CONFIG_E1000_MQ
1169 static void __devinit
1170 e1000_setup_queue_mapping(struct e1000_adapter *adapter)
1171 {
1172         int i, cpu;
1173
1174         adapter->rx_sched_call_data.func = e1000_rx_schedule;
1175         adapter->rx_sched_call_data.info = adapter->netdev;
1176         cpus_clear(adapter->rx_sched_call_data.cpumask);
1177
1178         adapter->cpu_netdev = alloc_percpu(struct net_device *);
1179         adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
1180
1181         lock_cpu_hotplug();
1182         i = 0;
1183         for_each_online_cpu(cpu) {
1184                 *per_cpu_ptr(adapter->cpu_tx_ring, cpu) = &adapter->tx_ring[i % adapter->num_tx_queues];
1185                 /* This is incomplete because we'd like to assign separate
1186                  * physical cpus to these netdev polling structures and
1187                  * avoid saturating a subset of cpus.
1188                  */
1189                 if (i < adapter->num_rx_queues) {
1190                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
1191                         adapter->rx_ring[i].cpu = cpu;
1192                         cpu_set(cpu, adapter->cpumask);
1193                 } else
1194                         *per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
1195
1196                 i++;
1197         }
1198         unlock_cpu_hotplug();
1199 }
1200 #endif
1201
1202 /**
1203  * e1000_open - Called when a network interface is made active
1204  * @netdev: network interface device structure
1205  *
1206  * Returns 0 on success, negative value on failure
1207  *
1208  * The open entry point is called when a network interface is made
1209  * active by the system (IFF_UP).  At this point all resources needed
1210  * for transmit and receive operations are allocated, the interrupt
1211  * handler is registered with the OS, the watchdog timer is started,
1212  * and the stack is notified that the interface is ready.
1213  **/
1214
1215 static int
1216 e1000_open(struct net_device *netdev)
1217 {
1218         struct e1000_adapter *adapter = netdev_priv(netdev);
1219         int err;
1220
1221         /* allocate transmit descriptors */
1222
1223         if ((err = e1000_setup_all_tx_resources(adapter)))
1224                 goto err_setup_tx;
1225
1226         /* allocate receive descriptors */
1227
1228         if ((err = e1000_setup_all_rx_resources(adapter)))
1229                 goto err_setup_rx;
1230
1231         if ((err = e1000_up(adapter)))
1232                 goto err_up;
1233         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1234         if ((adapter->hw.mng_cookie.status &
1235                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1236                 e1000_update_mng_vlan(adapter);
1237         }
1238
1239         /* If AMT is enabled, let the firmware know that the network
1240          * interface is now open */
1241         if (adapter->hw.mac_type == e1000_82573 &&
1242             e1000_check_mng_mode(&adapter->hw))
1243                 e1000_get_hw_control(adapter);
1244
1245         return E1000_SUCCESS;
1246
1247 err_up:
1248         e1000_free_all_rx_resources(adapter);
1249 err_setup_rx:
1250         e1000_free_all_tx_resources(adapter);
1251 err_setup_tx:
1252         e1000_reset(adapter);
1253
1254         return err;
1255 }
1256
1257 /**
1258  * e1000_close - Disables a network interface
1259  * @netdev: network interface device structure
1260  *
1261  * Returns 0, this is not allowed to fail
1262  *
1263  * The close entry point is called when an interface is de-activated
1264  * by the OS.  The hardware is still under the drivers control, but
1265  * needs to be disabled.  A global MAC reset is issued to stop the
1266  * hardware, and all transmit and receive resources are freed.
1267  **/
1268
1269 static int
1270 e1000_close(struct net_device *netdev)
1271 {
1272         struct e1000_adapter *adapter = netdev_priv(netdev);
1273
1274         e1000_down(adapter);
1275
1276         e1000_free_all_tx_resources(adapter);
1277         e1000_free_all_rx_resources(adapter);
1278
1279         if ((adapter->hw.mng_cookie.status &
1280                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1281                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1282         }
1283
1284         /* If AMT is enabled, let the firmware know that the network
1285          * interface is now closed */
1286         if (adapter->hw.mac_type == e1000_82573 &&
1287             e1000_check_mng_mode(&adapter->hw))
1288                 e1000_release_hw_control(adapter);
1289
1290         return 0;
1291 }
1292
1293 /**
1294  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1295  * @adapter: address of board private structure
1296  * @start: address of beginning of memory
1297  * @len: length of memory
1298  **/
1299 static inline boolean_t
1300 e1000_check_64k_bound(struct e1000_adapter *adapter,
1301                       void *start, unsigned long len)
1302 {
1303         unsigned long begin = (unsigned long) start;
1304         unsigned long end = begin + len;
1305
1306         /* First rev 82545 and 82546 need to not allow any memory
1307          * write location to cross 64k boundary due to errata 23 */
1308         if (adapter->hw.mac_type == e1000_82545 ||
1309             adapter->hw.mac_type == e1000_82546) {
1310                 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1311         }
1312
1313         return TRUE;
1314 }
1315
1316 /**
1317  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1318  * @adapter: board private structure
1319  * @txdr:    tx descriptor ring (for a specific queue) to setup
1320  *
1321  * Return 0 on success, negative on failure
1322  **/
1323
1324 static int
1325 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1326                          struct e1000_tx_ring *txdr)
1327 {
1328         struct pci_dev *pdev = adapter->pdev;
1329         int size;
1330
1331         size = sizeof(struct e1000_buffer) * txdr->count;
1332
1333         txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1334         if (!txdr->buffer_info) {
1335                 DPRINTK(PROBE, ERR,
1336                 "Unable to allocate memory for the transmit descriptor ring\n");
1337                 return -ENOMEM;
1338         }
1339         memset(txdr->buffer_info, 0, size);
1340
1341         /* round up to nearest 4K */
1342
1343         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1344         E1000_ROUNDUP(txdr->size, 4096);
1345
1346         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1347         if (!txdr->desc) {
1348 setup_tx_desc_die:
1349                 vfree(txdr->buffer_info);
1350                 DPRINTK(PROBE, ERR,
1351                 "Unable to allocate memory for the transmit descriptor ring\n");
1352                 return -ENOMEM;
1353         }
1354
1355         /* Fix for errata 23, can't cross 64kB boundary */
1356         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1357                 void *olddesc = txdr->desc;
1358                 dma_addr_t olddma = txdr->dma;
1359                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1360                                      "at %p\n", txdr->size, txdr->desc);
1361                 /* Try again, without freeing the previous */
1362                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1363                 /* Failed allocation, critical failure */
1364                 if (!txdr->desc) {
1365                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1366                         goto setup_tx_desc_die;
1367                 }
1368
1369                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1370                         /* give up */
1371                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1372                                             txdr->dma);
1373                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1374                         DPRINTK(PROBE, ERR,
1375                                 "Unable to allocate aligned memory "
1376                                 "for the transmit descriptor ring\n");
1377                         vfree(txdr->buffer_info);
1378                         return -ENOMEM;
1379                 } else {
1380                         /* Free old allocation, new allocation was successful */
1381                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1382                 }
1383         }
1384         memset(txdr->desc, 0, txdr->size);
1385
1386         txdr->next_to_use = 0;
1387         txdr->next_to_clean = 0;
1388         spin_lock_init(&txdr->tx_lock);
1389
1390         return 0;
1391 }
1392
1393 /**
1394  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1395  *                                (Descriptors) for all queues
1396  * @adapter: board private structure
1397  *
1398  * If this function returns with an error, then it's possible one or
1399  * more of the rings is populated (while the rest are not).  It is the
1400  * callers duty to clean those orphaned rings.
1401  *
1402  * Return 0 on success, negative on failure
1403  **/
1404
1405 int
1406 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1407 {
1408         int i, err = 0;
1409
1410         for (i = 0; i < adapter->num_tx_queues; i++) {
1411                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1412                 if (err) {
1413                         DPRINTK(PROBE, ERR,
1414                                 "Allocation for Tx Queue %u failed\n", i);
1415                         break;
1416                 }
1417         }
1418
1419         return err;
1420 }
1421
1422 /**
1423  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1424  * @adapter: board private structure
1425  *
1426  * Configure the Tx unit of the MAC after a reset.
1427  **/
1428
1429 static void
1430 e1000_configure_tx(struct e1000_adapter *adapter)
1431 {
1432         uint64_t tdba;
1433         struct e1000_hw *hw = &adapter->hw;
1434         uint32_t tdlen, tctl, tipg, tarc;
1435         uint32_t ipgr1, ipgr2;
1436
1437         /* Setup the HW Tx Head and Tail descriptor pointers */
1438
1439         switch (adapter->num_tx_queues) {
1440         case 2:
1441                 tdba = adapter->tx_ring[1].dma;
1442                 tdlen = adapter->tx_ring[1].count *
1443                         sizeof(struct e1000_tx_desc);
1444                 E1000_WRITE_REG(hw, TDBAL1, (tdba & 0x00000000ffffffffULL));
1445                 E1000_WRITE_REG(hw, TDBAH1, (tdba >> 32));
1446                 E1000_WRITE_REG(hw, TDLEN1, tdlen);
1447                 E1000_WRITE_REG(hw, TDH1, 0);
1448                 E1000_WRITE_REG(hw, TDT1, 0);
1449                 adapter->tx_ring[1].tdh = E1000_TDH1;
1450                 adapter->tx_ring[1].tdt = E1000_TDT1;
1451                 /* Fall Through */
1452         case 1:
1453         default:
1454                 tdba = adapter->tx_ring[0].dma;
1455                 tdlen = adapter->tx_ring[0].count *
1456                         sizeof(struct e1000_tx_desc);
1457                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1458                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1459                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1460                 E1000_WRITE_REG(hw, TDH, 0);
1461                 E1000_WRITE_REG(hw, TDT, 0);
1462                 adapter->tx_ring[0].tdh = E1000_TDH;
1463                 adapter->tx_ring[0].tdt = E1000_TDT;
1464                 break;
1465         }
1466
1467         /* Set the default values for the Tx Inter Packet Gap timer */
1468
1469         if (hw->media_type == e1000_media_type_fiber ||
1470             hw->media_type == e1000_media_type_internal_serdes)
1471                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1472         else
1473                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1474
1475         switch (hw->mac_type) {
1476         case e1000_82542_rev2_0:
1477         case e1000_82542_rev2_1:
1478                 tipg = DEFAULT_82542_TIPG_IPGT;
1479                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1480                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1481                 break;
1482         default:
1483                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1484                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1485                 break;
1486         }
1487         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1488         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1489         E1000_WRITE_REG(hw, TIPG, tipg);
1490
1491         /* Set the Tx Interrupt Delay register */
1492
1493         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1494         if (hw->mac_type >= e1000_82540)
1495                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1496
1497         /* Program the Transmit Control Register */
1498
1499         tctl = E1000_READ_REG(hw, TCTL);
1500
1501         tctl &= ~E1000_TCTL_CT;
1502         tctl |= E1000_TCTL_EN | E1000_TCTL_PSP | E1000_TCTL_RTLC |
1503                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1504
1505         E1000_WRITE_REG(hw, TCTL, tctl);
1506
1507         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1508                 tarc = E1000_READ_REG(hw, TARC0);
1509                 tarc |= ((1 << 25) | (1 << 21));
1510                 E1000_WRITE_REG(hw, TARC0, tarc);
1511                 tarc = E1000_READ_REG(hw, TARC1);
1512                 tarc |= (1 << 25);
1513                 if (tctl & E1000_TCTL_MULR)
1514                         tarc &= ~(1 << 28);
1515                 else
1516                         tarc |= (1 << 28);
1517                 E1000_WRITE_REG(hw, TARC1, tarc);
1518         }
1519
1520         e1000_config_collision_dist(hw);
1521
1522         /* Setup Transmit Descriptor Settings for eop descriptor */
1523         adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1524                 E1000_TXD_CMD_IFCS;
1525
1526         if (hw->mac_type < e1000_82543)
1527                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1528         else
1529                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1530
1531         /* Cache if we're 82544 running in PCI-X because we'll
1532          * need this to apply a workaround later in the send path. */
1533         if (hw->mac_type == e1000_82544 &&
1534             hw->bus_type == e1000_bus_type_pcix)
1535                 adapter->pcix_82544 = 1;
1536 }
1537
1538 /**
1539  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1540  * @adapter: board private structure
1541  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1542  *
1543  * Returns 0 on success, negative on failure
1544  **/
1545
1546 static int
1547 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1548                          struct e1000_rx_ring *rxdr)
1549 {
1550         struct pci_dev *pdev = adapter->pdev;
1551         int size, desc_len;
1552
1553         size = sizeof(struct e1000_buffer) * rxdr->count;
1554         rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1555         if (!rxdr->buffer_info) {
1556                 DPRINTK(PROBE, ERR,
1557                 "Unable to allocate memory for the receive descriptor ring\n");
1558                 return -ENOMEM;
1559         }
1560         memset(rxdr->buffer_info, 0, size);
1561
1562         size = sizeof(struct e1000_ps_page) * rxdr->count;
1563         rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1564         if (!rxdr->ps_page) {
1565                 vfree(rxdr->buffer_info);
1566                 DPRINTK(PROBE, ERR,
1567                 "Unable to allocate memory for the receive descriptor ring\n");
1568                 return -ENOMEM;
1569         }
1570         memset(rxdr->ps_page, 0, size);
1571
1572         size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1573         rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1574         if (!rxdr->ps_page_dma) {
1575                 vfree(rxdr->buffer_info);
1576                 kfree(rxdr->ps_page);
1577                 DPRINTK(PROBE, ERR,
1578                 "Unable to allocate memory for the receive descriptor ring\n");
1579                 return -ENOMEM;
1580         }
1581         memset(rxdr->ps_page_dma, 0, size);
1582
1583         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1584                 desc_len = sizeof(struct e1000_rx_desc);
1585         else
1586                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1587
1588         /* Round up to nearest 4K */
1589
1590         rxdr->size = rxdr->count * desc_len;
1591         E1000_ROUNDUP(rxdr->size, 4096);
1592
1593         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1594
1595         if (!rxdr->desc) {
1596                 DPRINTK(PROBE, ERR,
1597                 "Unable to allocate memory for the receive descriptor ring\n");
1598 setup_rx_desc_die:
1599                 vfree(rxdr->buffer_info);
1600                 kfree(rxdr->ps_page);
1601                 kfree(rxdr->ps_page_dma);
1602                 return -ENOMEM;
1603         }
1604
1605         /* Fix for errata 23, can't cross 64kB boundary */
1606         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1607                 void *olddesc = rxdr->desc;
1608                 dma_addr_t olddma = rxdr->dma;
1609                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1610                                      "at %p\n", rxdr->size, rxdr->desc);
1611                 /* Try again, without freeing the previous */
1612                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1613                 /* Failed allocation, critical failure */
1614                 if (!rxdr->desc) {
1615                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1616                         DPRINTK(PROBE, ERR,
1617                                 "Unable to allocate memory "
1618                                 "for the receive descriptor ring\n");
1619                         goto setup_rx_desc_die;
1620                 }
1621
1622                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1623                         /* give up */
1624                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1625                                             rxdr->dma);
1626                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1627                         DPRINTK(PROBE, ERR,
1628                                 "Unable to allocate aligned memory "
1629                                 "for the receive descriptor ring\n");
1630                         goto setup_rx_desc_die;
1631                 } else {
1632                         /* Free old allocation, new allocation was successful */
1633                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1634                 }
1635         }
1636         memset(rxdr->desc, 0, rxdr->size);
1637
1638         rxdr->next_to_clean = 0;
1639         rxdr->next_to_use = 0;
1640         rxdr->rx_skb_top = NULL;
1641         rxdr->rx_skb_prev = NULL;
1642
1643         return 0;
1644 }
1645
1646 /**
1647  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1648  *                                (Descriptors) for all queues
1649  * @adapter: board private structure
1650  *
1651  * If this function returns with an error, then it's possible one or
1652  * more of the rings is populated (while the rest are not).  It is the
1653  * callers duty to clean those orphaned rings.
1654  *
1655  * Return 0 on success, negative on failure
1656  **/
1657
1658 int
1659 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1660 {
1661         int i, err = 0;
1662
1663         for (i = 0; i < adapter->num_rx_queues; i++) {
1664                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1665                 if (err) {
1666                         DPRINTK(PROBE, ERR,
1667                                 "Allocation for Rx Queue %u failed\n", i);
1668                         break;
1669                 }
1670         }
1671
1672         return err;
1673 }
1674
1675 /**
1676  * e1000_setup_rctl - configure the receive control registers
1677  * @adapter: Board private structure
1678  **/
1679 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1680                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1681 static void
1682 e1000_setup_rctl(struct e1000_adapter *adapter)
1683 {
1684         uint32_t rctl, rfctl;
1685         uint32_t psrctl = 0;
1686 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1687         uint32_t pages = 0;
1688 #endif
1689
1690         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1691
1692         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1693
1694         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1695                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1696                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1697
1698         if (adapter->hw.mac_type > e1000_82543)
1699                 rctl |= E1000_RCTL_SECRC;
1700
1701         if (adapter->hw.tbi_compatibility_on == 1)
1702                 rctl |= E1000_RCTL_SBP;
1703         else
1704                 rctl &= ~E1000_RCTL_SBP;
1705
1706         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1707                 rctl &= ~E1000_RCTL_LPE;
1708         else
1709                 rctl |= E1000_RCTL_LPE;
1710
1711         /* Setup buffer sizes */
1712         if (adapter->hw.mac_type >= e1000_82571) {
1713                 /* We can now specify buffers in 1K increments.
1714                  * BSIZE and BSEX are ignored in this case. */
1715                 rctl |= adapter->rx_buffer_len << 0x11;
1716         } else {
1717                 rctl &= ~E1000_RCTL_SZ_4096;
1718                 rctl &= ~E1000_RCTL_BSEX;
1719                 rctl |= E1000_RCTL_SZ_2048;
1720         }
1721
1722 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1723         /* 82571 and greater support packet-split where the protocol
1724          * header is placed in skb->data and the packet data is
1725          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1726          * In the case of a non-split, skb->data is linearly filled,
1727          * followed by the page buffers.  Therefore, skb->data is
1728          * sized to hold the largest protocol header.
1729          */
1730         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1731         if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1732             PAGE_SIZE <= 16384)
1733                 adapter->rx_ps_pages = pages;
1734         else
1735                 adapter->rx_ps_pages = 0;
1736 #endif
1737         if (adapter->rx_ps_pages) {
1738                 /* Configure extra packet-split registers */
1739                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1740                 rfctl |= E1000_RFCTL_EXTEN;
1741                 /* disable IPv6 packet split support */
1742                 rfctl |= E1000_RFCTL_IPV6_DIS;
1743                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1744
1745                 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1746
1747                 psrctl |= adapter->rx_ps_bsize0 >>
1748                         E1000_PSRCTL_BSIZE0_SHIFT;
1749
1750                 switch (adapter->rx_ps_pages) {
1751                 case 3:
1752                         psrctl |= PAGE_SIZE <<
1753                                 E1000_PSRCTL_BSIZE3_SHIFT;
1754                 case 2:
1755                         psrctl |= PAGE_SIZE <<
1756                                 E1000_PSRCTL_BSIZE2_SHIFT;
1757                 case 1:
1758                         psrctl |= PAGE_SIZE >>
1759                                 E1000_PSRCTL_BSIZE1_SHIFT;
1760                         break;
1761                 }
1762
1763                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1764         }
1765
1766         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1767 }
1768
1769 /**
1770  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1771  * @adapter: board private structure
1772  *
1773  * Configure the Rx unit of the MAC after a reset.
1774  **/
1775
1776 static void
1777 e1000_configure_rx(struct e1000_adapter *adapter)
1778 {
1779         uint64_t rdba;
1780         struct e1000_hw *hw = &adapter->hw;
1781         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1782 #ifdef CONFIG_E1000_MQ
1783         uint32_t reta, mrqc;
1784         int i;
1785 #endif
1786
1787         if (adapter->rx_ps_pages) {
1788                 rdlen = adapter->rx_ring[0].count *
1789                         sizeof(union e1000_rx_desc_packet_split);
1790                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1791                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1792         } else {
1793                 rdlen = adapter->rx_ring[0].count *
1794                         sizeof(struct e1000_rx_desc);
1795                 adapter->clean_rx = e1000_clean_rx_irq;
1796                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1797         }
1798
1799         /* disable receives while setting up the descriptors */
1800         rctl = E1000_READ_REG(hw, RCTL);
1801         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1802
1803         /* set the Receive Delay Timer Register */
1804         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1805
1806         if (hw->mac_type >= e1000_82540) {
1807                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1808                 if (adapter->itr > 1)
1809                         E1000_WRITE_REG(hw, ITR,
1810                                 1000000000 / (adapter->itr * 256));
1811         }
1812
1813         if (hw->mac_type >= e1000_82571) {
1814                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1815                 /* Reset delay timers after every interrupt */
1816                 ctrl_ext |= E1000_CTRL_EXT_CANC;
1817 #ifdef CONFIG_E1000_NAPI
1818                 /* Auto-Mask interrupts upon ICR read. */
1819                 ctrl_ext |= E1000_CTRL_EXT_IAME;
1820 #endif
1821                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1822                 E1000_WRITE_REG(hw, IAM, ~0);
1823                 E1000_WRITE_FLUSH(hw);
1824         }
1825
1826         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1827          * the Base and Length of the Rx Descriptor Ring */
1828         switch (adapter->num_rx_queues) {
1829 #ifdef CONFIG_E1000_MQ
1830         case 2:
1831                 rdba = adapter->rx_ring[1].dma;
1832                 E1000_WRITE_REG(hw, RDBAL1, (rdba & 0x00000000ffffffffULL));
1833                 E1000_WRITE_REG(hw, RDBAH1, (rdba >> 32));
1834                 E1000_WRITE_REG(hw, RDLEN1, rdlen);
1835                 E1000_WRITE_REG(hw, RDH1, 0);
1836                 E1000_WRITE_REG(hw, RDT1, 0);
1837                 adapter->rx_ring[1].rdh = E1000_RDH1;
1838                 adapter->rx_ring[1].rdt = E1000_RDT1;
1839                 /* Fall Through */
1840 #endif
1841         case 1:
1842         default:
1843                 rdba = adapter->rx_ring[0].dma;
1844                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1845                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1846                 E1000_WRITE_REG(hw, RDLEN, rdlen);
1847                 E1000_WRITE_REG(hw, RDH, 0);
1848                 E1000_WRITE_REG(hw, RDT, 0);
1849                 adapter->rx_ring[0].rdh = E1000_RDH;
1850                 adapter->rx_ring[0].rdt = E1000_RDT;
1851                 break;
1852         }
1853
1854 #ifdef CONFIG_E1000_MQ
1855         if (adapter->num_rx_queues > 1) {
1856                 uint32_t random[10];
1857
1858                 get_random_bytes(&random[0], 40);
1859
1860                 if (hw->mac_type <= e1000_82572) {
1861                         E1000_WRITE_REG(hw, RSSIR, 0);
1862                         E1000_WRITE_REG(hw, RSSIM, 0);
1863                 }
1864
1865                 switch (adapter->num_rx_queues) {
1866                 case 2:
1867                 default:
1868                         reta = 0x00800080;
1869                         mrqc = E1000_MRQC_ENABLE_RSS_2Q;
1870                         break;
1871                 }
1872
1873                 /* Fill out redirection table */
1874                 for (i = 0; i < 32; i++)
1875                         E1000_WRITE_REG_ARRAY(hw, RETA, i, reta);
1876                 /* Fill out hash function seeds */
1877                 for (i = 0; i < 10; i++)
1878                         E1000_WRITE_REG_ARRAY(hw, RSSRK, i, random[i]);
1879
1880                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1881                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1882                 E1000_WRITE_REG(hw, MRQC, mrqc);
1883         }
1884
1885         /* Multiqueue and packet checksumming are mutually exclusive. */
1886         if (hw->mac_type >= e1000_82571) {
1887                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1888                 rxcsum |= E1000_RXCSUM_PCSD;
1889                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1890         }
1891
1892 #else
1893
1894         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1895         if (hw->mac_type >= e1000_82543) {
1896                 rxcsum = E1000_READ_REG(hw, RXCSUM);
1897                 if (adapter->rx_csum == TRUE) {
1898                         rxcsum |= E1000_RXCSUM_TUOFL;
1899
1900                         /* Enable 82571 IPv4 payload checksum for UDP fragments
1901                          * Must be used in conjunction with packet-split. */
1902                         if ((hw->mac_type >= e1000_82571) &&
1903                             (adapter->rx_ps_pages)) {
1904                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1905                         }
1906                 } else {
1907                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1908                         /* don't need to clear IPPCSE as it defaults to 0 */
1909                 }
1910                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1911         }
1912 #endif /* CONFIG_E1000_MQ */
1913
1914         if (hw->mac_type == e1000_82573)
1915                 E1000_WRITE_REG(hw, ERT, 0x0100);
1916
1917         /* Enable Receives */
1918         E1000_WRITE_REG(hw, RCTL, rctl);
1919 }
1920
1921 /**
1922  * e1000_free_tx_resources - Free Tx Resources per Queue
1923  * @adapter: board private structure
1924  * @tx_ring: Tx descriptor ring for a specific queue
1925  *
1926  * Free all transmit software resources
1927  **/
1928
1929 static void
1930 e1000_free_tx_resources(struct e1000_adapter *adapter,
1931                         struct e1000_tx_ring *tx_ring)
1932 {
1933         struct pci_dev *pdev = adapter->pdev;
1934
1935         e1000_clean_tx_ring(adapter, tx_ring);
1936
1937         vfree(tx_ring->buffer_info);
1938         tx_ring->buffer_info = NULL;
1939
1940         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1941
1942         tx_ring->desc = NULL;
1943 }
1944
1945 /**
1946  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1947  * @adapter: board private structure
1948  *
1949  * Free all transmit software resources
1950  **/
1951
1952 void
1953 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1954 {
1955         int i;
1956
1957         for (i = 0; i < adapter->num_tx_queues; i++)
1958                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1959 }
1960
1961 static inline void
1962 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1963                         struct e1000_buffer *buffer_info)
1964 {
1965         if (buffer_info->dma) {
1966                 pci_unmap_page(adapter->pdev,
1967                                 buffer_info->dma,
1968                                 buffer_info->length,
1969                                 PCI_DMA_TODEVICE);
1970         }
1971         if (buffer_info->skb)
1972                 dev_kfree_skb_any(buffer_info->skb);
1973         memset(buffer_info, 0, sizeof(struct e1000_buffer));
1974 }
1975
1976 /**
1977  * e1000_clean_tx_ring - Free Tx Buffers
1978  * @adapter: board private structure
1979  * @tx_ring: ring to be cleaned
1980  **/
1981
1982 static void
1983 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1984                     struct e1000_tx_ring *tx_ring)
1985 {
1986         struct e1000_buffer *buffer_info;
1987         unsigned long size;
1988         unsigned int i;
1989
1990         /* Free all the Tx ring sk_buffs */
1991
1992         for (i = 0; i < tx_ring->count; i++) {
1993                 buffer_info = &tx_ring->buffer_info[i];
1994                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1995         }
1996
1997         size = sizeof(struct e1000_buffer) * tx_ring->count;
1998         memset(tx_ring->buffer_info, 0, size);
1999
2000         /* Zero out the descriptor ring */
2001
2002         memset(tx_ring->desc, 0, tx_ring->size);
2003
2004         tx_ring->next_to_use = 0;
2005         tx_ring->next_to_clean = 0;
2006         tx_ring->last_tx_tso = 0;
2007
2008         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2009         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2010 }
2011
2012 /**
2013  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2014  * @adapter: board private structure
2015  **/
2016
2017 static void
2018 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2019 {
2020         int i;
2021
2022         for (i = 0; i < adapter->num_tx_queues; i++)
2023                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2024 }
2025
2026 /**
2027  * e1000_free_rx_resources - Free Rx Resources
2028  * @adapter: board private structure
2029  * @rx_ring: ring to clean the resources from
2030  *
2031  * Free all receive software resources
2032  **/
2033
2034 static void
2035 e1000_free_rx_resources(struct e1000_adapter *adapter,
2036                         struct e1000_rx_ring *rx_ring)
2037 {
2038         struct pci_dev *pdev = adapter->pdev;
2039
2040         e1000_clean_rx_ring(adapter, rx_ring);
2041
2042         vfree(rx_ring->buffer_info);
2043         rx_ring->buffer_info = NULL;
2044         kfree(rx_ring->ps_page);
2045         rx_ring->ps_page = NULL;
2046         kfree(rx_ring->ps_page_dma);
2047         rx_ring->ps_page_dma = NULL;
2048
2049         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2050
2051         rx_ring->desc = NULL;
2052 }
2053
2054 /**
2055  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2056  * @adapter: board private structure
2057  *
2058  * Free all receive software resources
2059  **/
2060
2061 void
2062 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2063 {
2064         int i;
2065
2066         for (i = 0; i < adapter->num_rx_queues; i++)
2067                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2068 }
2069
2070 /**
2071  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2072  * @adapter: board private structure
2073  * @rx_ring: ring to free buffers from
2074  **/
2075
2076 static void
2077 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2078                     struct e1000_rx_ring *rx_ring)
2079 {
2080         struct e1000_buffer *buffer_info;
2081         struct e1000_ps_page *ps_page;
2082         struct e1000_ps_page_dma *ps_page_dma;
2083         struct pci_dev *pdev = adapter->pdev;
2084         unsigned long size;
2085         unsigned int i, j;
2086
2087         /* Free all the Rx ring sk_buffs */
2088         for (i = 0; i < rx_ring->count; i++) {
2089                 buffer_info = &rx_ring->buffer_info[i];
2090                 if (buffer_info->skb) {
2091                         pci_unmap_single(pdev,
2092                                          buffer_info->dma,
2093                                          buffer_info->length,
2094                                          PCI_DMA_FROMDEVICE);
2095
2096                         dev_kfree_skb(buffer_info->skb);
2097                         buffer_info->skb = NULL;
2098                 }
2099                 ps_page = &rx_ring->ps_page[i];
2100                 ps_page_dma = &rx_ring->ps_page_dma[i];
2101                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2102                         if (!ps_page->ps_page[j]) break;
2103                         pci_unmap_page(pdev,
2104                                        ps_page_dma->ps_page_dma[j],
2105                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2106                         ps_page_dma->ps_page_dma[j] = 0;
2107                         put_page(ps_page->ps_page[j]);
2108                         ps_page->ps_page[j] = NULL;
2109                 }
2110         }
2111
2112         /* there also may be some cached data in our adapter */
2113         if (rx_ring->rx_skb_top) {
2114                 dev_kfree_skb(rx_ring->rx_skb_top);
2115
2116                 /* rx_skb_prev will be wiped out by rx_skb_top */
2117                 rx_ring->rx_skb_top = NULL;
2118                 rx_ring->rx_skb_prev = NULL;
2119         }
2120
2121
2122         size = sizeof(struct e1000_buffer) * rx_ring->count;
2123         memset(rx_ring->buffer_info, 0, size);
2124         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2125         memset(rx_ring->ps_page, 0, size);
2126         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2127         memset(rx_ring->ps_page_dma, 0, size);
2128
2129         /* Zero out the descriptor ring */
2130
2131         memset(rx_ring->desc, 0, rx_ring->size);
2132
2133         rx_ring->next_to_clean = 0;
2134         rx_ring->next_to_use = 0;
2135
2136         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2137         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2138 }
2139
2140 /**
2141  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2142  * @adapter: board private structure
2143  **/
2144
2145 static void
2146 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2147 {
2148         int i;
2149
2150         for (i = 0; i < adapter->num_rx_queues; i++)
2151                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2152 }
2153
2154 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2155  * and memory write and invalidate disabled for certain operations
2156  */
2157 static void
2158 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2159 {
2160         struct net_device *netdev = adapter->netdev;
2161         uint32_t rctl;
2162
2163         e1000_pci_clear_mwi(&adapter->hw);
2164
2165         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2166         rctl |= E1000_RCTL_RST;
2167         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2168         E1000_WRITE_FLUSH(&adapter->hw);
2169         mdelay(5);
2170
2171         if (netif_running(netdev))
2172                 e1000_clean_all_rx_rings(adapter);
2173 }
2174
2175 static void
2176 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2177 {
2178         struct net_device *netdev = adapter->netdev;
2179         uint32_t rctl;
2180
2181         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2182         rctl &= ~E1000_RCTL_RST;
2183         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2184         E1000_WRITE_FLUSH(&adapter->hw);
2185         mdelay(5);
2186
2187         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2188                 e1000_pci_set_mwi(&adapter->hw);
2189
2190         if (netif_running(netdev)) {
2191                 e1000_configure_rx(adapter);
2192                 /* No need to loop, because 82542 supports only 1 queue */
2193                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2194                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2195         }
2196 }
2197
2198 /**
2199  * e1000_set_mac - Change the Ethernet Address of the NIC
2200  * @netdev: network interface device structure
2201  * @p: pointer to an address structure
2202  *
2203  * Returns 0 on success, negative on failure
2204  **/
2205
2206 static int
2207 e1000_set_mac(struct net_device *netdev, void *p)
2208 {
2209         struct e1000_adapter *adapter = netdev_priv(netdev);
2210         struct sockaddr *addr = p;
2211
2212         if (!is_valid_ether_addr(addr->sa_data))
2213                 return -EADDRNOTAVAIL;
2214
2215         /* 82542 2.0 needs to be in reset to write receive address registers */
2216
2217         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2218                 e1000_enter_82542_rst(adapter);
2219
2220         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2221         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2222
2223         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2224
2225         /* With 82571 controllers, LAA may be overwritten (with the default)
2226          * due to controller reset from the other port. */
2227         if (adapter->hw.mac_type == e1000_82571) {
2228                 /* activate the work around */
2229                 adapter->hw.laa_is_present = 1;
2230
2231                 /* Hold a copy of the LAA in RAR[14] This is done so that
2232                  * between the time RAR[0] gets clobbered  and the time it
2233                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2234                  * of the RARs and no incoming packets directed to this port
2235                  * are dropped. Eventaully the LAA will be in RAR[0] and
2236                  * RAR[14] */
2237                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2238                                         E1000_RAR_ENTRIES - 1);
2239         }
2240
2241         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2242                 e1000_leave_82542_rst(adapter);
2243
2244         return 0;
2245 }
2246
2247 /**
2248  * e1000_set_multi - Multicast and Promiscuous mode set
2249  * @netdev: network interface device structure
2250  *
2251  * The set_multi entry point is called whenever the multicast address
2252  * list or the network interface flags are updated.  This routine is
2253  * responsible for configuring the hardware for proper multicast,
2254  * promiscuous mode, and all-multi behavior.
2255  **/
2256
2257 static void
2258 e1000_set_multi(struct net_device *netdev)
2259 {
2260         struct e1000_adapter *adapter = netdev_priv(netdev);
2261         struct e1000_hw *hw = &adapter->hw;
2262         struct dev_mc_list *mc_ptr;
2263         uint32_t rctl;
2264         uint32_t hash_value;
2265         int i, rar_entries = E1000_RAR_ENTRIES;
2266
2267         /* reserve RAR[14] for LAA over-write work-around */
2268         if (adapter->hw.mac_type == e1000_82571)
2269                 rar_entries--;
2270
2271         /* Check for Promiscuous and All Multicast modes */
2272
2273         rctl = E1000_READ_REG(hw, RCTL);
2274
2275         if (netdev->flags & IFF_PROMISC) {
2276                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2277         } else if (netdev->flags & IFF_ALLMULTI) {
2278                 rctl |= E1000_RCTL_MPE;
2279                 rctl &= ~E1000_RCTL_UPE;
2280         } else {
2281                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2282         }
2283
2284         E1000_WRITE_REG(hw, RCTL, rctl);
2285
2286         /* 82542 2.0 needs to be in reset to write receive address registers */
2287
2288         if (hw->mac_type == e1000_82542_rev2_0)
2289                 e1000_enter_82542_rst(adapter);
2290
2291         /* load the first 14 multicast address into the exact filters 1-14
2292          * RAR 0 is used for the station MAC adddress
2293          * if there are not 14 addresses, go ahead and clear the filters
2294          * -- with 82571 controllers only 0-13 entries are filled here
2295          */
2296         mc_ptr = netdev->mc_list;
2297
2298         for (i = 1; i < rar_entries; i++) {
2299                 if (mc_ptr) {
2300                         e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2301                         mc_ptr = mc_ptr->next;
2302                 } else {
2303                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2304                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2305                 }
2306         }
2307
2308         /* clear the old settings from the multicast hash table */
2309
2310         for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2311                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2312
2313         /* load any remaining addresses into the hash table */
2314
2315         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2316                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2317                 e1000_mta_set(hw, hash_value);
2318         }
2319
2320         if (hw->mac_type == e1000_82542_rev2_0)
2321                 e1000_leave_82542_rst(adapter);
2322 }
2323
2324 /* Need to wait a few seconds after link up to get diagnostic information from
2325  * the phy */
2326
2327 static void
2328 e1000_update_phy_info(unsigned long data)
2329 {
2330         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2331         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2332 }
2333
2334 /**
2335  * e1000_82547_tx_fifo_stall - Timer Call-back
2336  * @data: pointer to adapter cast into an unsigned long
2337  **/
2338
2339 static void
2340 e1000_82547_tx_fifo_stall(unsigned long data)
2341 {
2342         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2343         struct net_device *netdev = adapter->netdev;
2344         uint32_t tctl;
2345
2346         if (atomic_read(&adapter->tx_fifo_stall)) {
2347                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2348                     E1000_READ_REG(&adapter->hw, TDH)) &&
2349                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2350                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2351                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2352                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2353                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2354                         E1000_WRITE_REG(&adapter->hw, TCTL,
2355                                         tctl & ~E1000_TCTL_EN);
2356                         E1000_WRITE_REG(&adapter->hw, TDFT,
2357                                         adapter->tx_head_addr);
2358                         E1000_WRITE_REG(&adapter->hw, TDFH,
2359                                         adapter->tx_head_addr);
2360                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2361                                         adapter->tx_head_addr);
2362                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2363                                         adapter->tx_head_addr);
2364                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2365                         E1000_WRITE_FLUSH(&adapter->hw);
2366
2367                         adapter->tx_fifo_head = 0;
2368                         atomic_set(&adapter->tx_fifo_stall, 0);
2369                         netif_wake_queue(netdev);
2370                 } else {
2371                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2372                 }
2373         }
2374 }
2375
2376 /**
2377  * e1000_watchdog - Timer Call-back
2378  * @data: pointer to adapter cast into an unsigned long
2379  **/
2380 static void
2381 e1000_watchdog(unsigned long data)
2382 {
2383         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2384
2385         /* Do the rest outside of interrupt context */
2386         schedule_work(&adapter->watchdog_task);
2387 }
2388
2389 static void
2390 e1000_watchdog_task(struct e1000_adapter *adapter)
2391 {
2392         struct net_device *netdev = adapter->netdev;
2393         struct e1000_tx_ring *txdr = adapter->tx_ring;
2394         uint32_t link;
2395
2396         e1000_check_for_link(&adapter->hw);
2397         if (adapter->hw.mac_type == e1000_82573) {
2398                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2399                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2400                         e1000_update_mng_vlan(adapter);
2401         }
2402
2403         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2404            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2405                 link = !adapter->hw.serdes_link_down;
2406         else
2407                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2408
2409         if (link) {
2410                 if (!netif_carrier_ok(netdev)) {
2411                         e1000_get_speed_and_duplex(&adapter->hw,
2412                                                    &adapter->link_speed,
2413                                                    &adapter->link_duplex);
2414
2415                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2416                                adapter->link_speed,
2417                                adapter->link_duplex == FULL_DUPLEX ?
2418                                "Full Duplex" : "Half Duplex");
2419
2420                         /* tweak tx_queue_len according to speed/duplex */
2421                         netdev->tx_queue_len = adapter->tx_queue_len;
2422                         adapter->tx_timeout_factor = 1;
2423                         if (adapter->link_duplex == HALF_DUPLEX) {
2424                                 switch (adapter->link_speed) {
2425                                 case SPEED_10:
2426                                         netdev->tx_queue_len = 10;
2427                                         adapter->tx_timeout_factor = 8;
2428                                         break;
2429                                 case SPEED_100:
2430                                         netdev->tx_queue_len = 100;
2431                                         break;
2432                                 }
2433                         }
2434
2435                         netif_carrier_on(netdev);
2436                         netif_wake_queue(netdev);
2437                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2438                         adapter->smartspeed = 0;
2439                 }
2440         } else {
2441                 if (netif_carrier_ok(netdev)) {
2442                         adapter->link_speed = 0;
2443                         adapter->link_duplex = 0;
2444                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2445                         netif_carrier_off(netdev);
2446                         netif_stop_queue(netdev);
2447                         mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2448                 }
2449
2450                 e1000_smartspeed(adapter);
2451         }
2452
2453         e1000_update_stats(adapter);
2454
2455         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2456         adapter->tpt_old = adapter->stats.tpt;
2457         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2458         adapter->colc_old = adapter->stats.colc;
2459
2460         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2461         adapter->gorcl_old = adapter->stats.gorcl;
2462         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2463         adapter->gotcl_old = adapter->stats.gotcl;
2464
2465         e1000_update_adaptive(&adapter->hw);
2466
2467 #ifdef CONFIG_E1000_MQ
2468         txdr = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2469 #endif
2470         if (!netif_carrier_ok(netdev)) {
2471                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2472                         /* We've lost link, so the controller stops DMA,
2473                          * but we've got queued Tx work that's never going
2474                          * to get done, so reset controller to flush Tx.
2475                          * (Do the reset outside of interrupt context). */
2476                         schedule_work(&adapter->tx_timeout_task);
2477                 }
2478         }
2479
2480         /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2481         if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2482                 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2483                  * asymmetrical Tx or Rx gets ITR=8000; everyone
2484                  * else is between 2000-8000. */
2485                 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2486                 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2487                         adapter->gotcl - adapter->gorcl :
2488                         adapter->gorcl - adapter->gotcl) / 10000;
2489                 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2490                 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2491         }
2492
2493         /* Cause software interrupt to ensure rx ring is cleaned */
2494         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2495
2496         /* Force detection of hung controller every watchdog period */
2497         adapter->detect_tx_hung = TRUE;
2498
2499         /* With 82571 controllers, LAA may be overwritten due to controller
2500          * reset from the other port. Set the appropriate LAA in RAR[0] */
2501         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2502                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2503
2504         /* Reset the timer */
2505         mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2506 }
2507
2508 #define E1000_TX_FLAGS_CSUM             0x00000001
2509 #define E1000_TX_FLAGS_VLAN             0x00000002
2510 #define E1000_TX_FLAGS_TSO              0x00000004
2511 #define E1000_TX_FLAGS_IPV4             0x00000008
2512 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2513 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2514
2515 static inline int
2516 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2517           struct sk_buff *skb)
2518 {
2519 #ifdef NETIF_F_TSO
2520         struct e1000_context_desc *context_desc;
2521         struct e1000_buffer *buffer_info;
2522         unsigned int i;
2523         uint32_t cmd_length = 0;
2524         uint16_t ipcse = 0, tucse, mss;
2525         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2526         int err;
2527
2528         if (skb_shinfo(skb)->tso_size) {
2529                 if (skb_header_cloned(skb)) {
2530                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2531                         if (err)
2532                                 return err;
2533                 }
2534
2535                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2536                 mss = skb_shinfo(skb)->tso_size;
2537                 if (skb->protocol == ntohs(ETH_P_IP)) {
2538                         skb->nh.iph->tot_len = 0;
2539                         skb->nh.iph->check = 0;
2540                         skb->h.th->check =
2541                                 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2542                                                    skb->nh.iph->daddr,
2543                                                    0,
2544                                                    IPPROTO_TCP,
2545                                                    0);
2546                         cmd_length = E1000_TXD_CMD_IP;
2547                         ipcse = skb->h.raw - skb->data - 1;
2548 #ifdef NETIF_F_TSO_IPV6
2549                 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2550                         skb->nh.ipv6h->payload_len = 0;
2551                         skb->h.th->check =
2552                                 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2553                                                  &skb->nh.ipv6h->daddr,
2554                                                  0,
2555                                                  IPPROTO_TCP,
2556                                                  0);
2557                         ipcse = 0;
2558 #endif
2559                 }
2560                 ipcss = skb->nh.raw - skb->data;
2561                 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2562                 tucss = skb->h.raw - skb->data;
2563                 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2564                 tucse = 0;
2565
2566                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2567                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2568
2569                 i = tx_ring->next_to_use;
2570                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2571                 buffer_info = &tx_ring->buffer_info[i];
2572
2573                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2574                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2575                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2576                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2577                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2578                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2579                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2580                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2581                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2582
2583                 buffer_info->time_stamp = jiffies;
2584
2585                 if (++i == tx_ring->count) i = 0;
2586                 tx_ring->next_to_use = i;
2587
2588                 return TRUE;
2589         }
2590 #endif
2591
2592         return FALSE;
2593 }
2594
2595 static inline boolean_t
2596 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2597               struct sk_buff *skb)
2598 {
2599         struct e1000_context_desc *context_desc;
2600         struct e1000_buffer *buffer_info;
2601         unsigned int i;
2602         uint8_t css;
2603
2604         if (likely(skb->ip_summed == CHECKSUM_HW)) {
2605                 css = skb->h.raw - skb->data;
2606
2607                 i = tx_ring->next_to_use;
2608                 buffer_info = &tx_ring->buffer_info[i];
2609                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2610
2611                 context_desc->upper_setup.tcp_fields.tucss = css;
2612                 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2613                 context_desc->upper_setup.tcp_fields.tucse = 0;
2614                 context_desc->tcp_seg_setup.data = 0;
2615                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2616
2617                 buffer_info->time_stamp = jiffies;
2618
2619                 if (unlikely(++i == tx_ring->count)) i = 0;
2620                 tx_ring->next_to_use = i;
2621
2622                 return TRUE;
2623         }
2624
2625         return FALSE;
2626 }
2627
2628 #define E1000_MAX_TXD_PWR       12
2629 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
2630
2631 static inline int
2632 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2633              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2634              unsigned int nr_frags, unsigned int mss)
2635 {
2636         struct e1000_buffer *buffer_info;
2637         unsigned int len = skb->len;
2638         unsigned int offset = 0, size, count = 0, i;
2639         unsigned int f;
2640         len -= skb->data_len;
2641
2642         i = tx_ring->next_to_use;
2643
2644         while (len) {
2645                 buffer_info = &tx_ring->buffer_info[i];
2646                 size = min(len, max_per_txd);
2647 #ifdef NETIF_F_TSO
2648                 /* Workaround for Controller erratum --
2649                  * descriptor for non-tso packet in a linear SKB that follows a
2650                  * tso gets written back prematurely before the data is fully
2651                  * DMAd to the controller */
2652                 if (!skb->data_len && tx_ring->last_tx_tso &&
2653                                 !skb_shinfo(skb)->tso_size) {
2654                         tx_ring->last_tx_tso = 0;
2655                         size -= 4;
2656                 }
2657
2658                 /* Workaround for premature desc write-backs
2659                  * in TSO mode.  Append 4-byte sentinel desc */
2660                 if (unlikely(mss && !nr_frags && size == len && size > 8))
2661                         size -= 4;
2662 #endif
2663                 /* work-around for errata 10 and it applies
2664                  * to all controllers in PCI-X mode
2665                  * The fix is to make sure that the first descriptor of a
2666                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2667                  */
2668                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2669                                 (size > 2015) && count == 0))
2670                         size = 2015;
2671
2672                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
2673                  * terminating buffers within evenly-aligned dwords. */
2674                 if (unlikely(adapter->pcix_82544 &&
2675                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2676                    size > 4))
2677                         size -= 4;
2678
2679                 buffer_info->length = size;
2680                 buffer_info->dma =
2681                         pci_map_single(adapter->pdev,
2682                                 skb->data + offset,
2683                                 size,
2684                                 PCI_DMA_TODEVICE);
2685                 buffer_info->time_stamp = jiffies;
2686
2687                 len -= size;
2688                 offset += size;
2689                 count++;
2690                 if (unlikely(++i == tx_ring->count)) i = 0;
2691         }
2692
2693         for (f = 0; f < nr_frags; f++) {
2694                 struct skb_frag_struct *frag;
2695
2696                 frag = &skb_shinfo(skb)->frags[f];
2697                 len = frag->size;
2698                 offset = frag->page_offset;
2699
2700                 while (len) {
2701                         buffer_info = &tx_ring->buffer_info[i];
2702                         size = min(len, max_per_txd);
2703 #ifdef NETIF_F_TSO
2704                         /* Workaround for premature desc write-backs
2705                          * in TSO mode.  Append 4-byte sentinel desc */
2706                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2707                                 size -= 4;
2708 #endif
2709                         /* Workaround for potential 82544 hang in PCI-X.
2710                          * Avoid terminating buffers within evenly-aligned
2711                          * dwords. */
2712                         if (unlikely(adapter->pcix_82544 &&
2713                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
2714                            size > 4))
2715                                 size -= 4;
2716
2717                         buffer_info->length = size;
2718                         buffer_info->dma =
2719                                 pci_map_page(adapter->pdev,
2720                                         frag->page,
2721                                         offset,
2722                                         size,
2723                                         PCI_DMA_TODEVICE);
2724                         buffer_info->time_stamp = jiffies;
2725
2726                         len -= size;
2727                         offset += size;
2728                         count++;
2729                         if (unlikely(++i == tx_ring->count)) i = 0;
2730                 }
2731         }
2732
2733         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2734         tx_ring->buffer_info[i].skb = skb;
2735         tx_ring->buffer_info[first].next_to_watch = i;
2736
2737         return count;
2738 }
2739
2740 static inline void
2741 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2742                int tx_flags, int count)
2743 {
2744         struct e1000_tx_desc *tx_desc = NULL;
2745         struct e1000_buffer *buffer_info;
2746         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2747         unsigned int i;
2748
2749         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2750                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2751                              E1000_TXD_CMD_TSE;
2752                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2753
2754                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2755                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2756         }
2757
2758         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2759                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2760                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2761         }
2762
2763         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2764                 txd_lower |= E1000_TXD_CMD_VLE;
2765                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2766         }
2767
2768         i = tx_ring->next_to_use;
2769
2770         while (count--) {
2771                 buffer_info = &tx_ring->buffer_info[i];
2772                 tx_desc = E1000_TX_DESC(*tx_ring, i);
2773                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2774                 tx_desc->lower.data =
2775                         cpu_to_le32(txd_lower | buffer_info->length);
2776                 tx_desc->upper.data = cpu_to_le32(txd_upper);
2777                 if (unlikely(++i == tx_ring->count)) i = 0;
2778         }
2779
2780         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2781
2782         /* Force memory writes to complete before letting h/w
2783          * know there are new descriptors to fetch.  (Only
2784          * applicable for weak-ordered memory model archs,
2785          * such as IA-64). */
2786         wmb();
2787
2788         tx_ring->next_to_use = i;
2789         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2790 }
2791
2792 /**
2793  * 82547 workaround to avoid controller hang in half-duplex environment.
2794  * The workaround is to avoid queuing a large packet that would span
2795  * the internal Tx FIFO ring boundary by notifying the stack to resend
2796  * the packet at a later time.  This gives the Tx FIFO an opportunity to
2797  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
2798  * to the beginning of the Tx FIFO.
2799  **/
2800
2801 #define E1000_FIFO_HDR                  0x10
2802 #define E1000_82547_PAD_LEN             0x3E0
2803
2804 static inline int
2805 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2806 {
2807         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2808         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2809
2810         E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2811
2812         if (adapter->link_duplex != HALF_DUPLEX)
2813                 goto no_fifo_stall_required;
2814
2815         if (atomic_read(&adapter->tx_fifo_stall))
2816                 return 1;
2817
2818         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2819                 atomic_set(&adapter->tx_fifo_stall, 1);
2820                 return 1;
2821         }
2822
2823 no_fifo_stall_required:
2824         adapter->tx_fifo_head += skb_fifo_len;
2825         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2826                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2827         return 0;
2828 }
2829
2830 #define MINIMUM_DHCP_PACKET_SIZE 282
2831 static inline int
2832 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2833 {
2834         struct e1000_hw *hw =  &adapter->hw;
2835         uint16_t length, offset;
2836         if (vlan_tx_tag_present(skb)) {
2837                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2838                         ( adapter->hw.mng_cookie.status &
2839                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2840                         return 0;
2841         }
2842         if ((skb->len > MINIMUM_DHCP_PACKET_SIZE) && (!skb->protocol)) {
2843                 struct ethhdr *eth = (struct ethhdr *) skb->data;
2844                 if ((htons(ETH_P_IP) == eth->h_proto)) {
2845                         const struct iphdr *ip =
2846                                 (struct iphdr *)((uint8_t *)skb->data+14);
2847                         if (IPPROTO_UDP == ip->protocol) {
2848                                 struct udphdr *udp =
2849                                         (struct udphdr *)((uint8_t *)ip +
2850                                                 (ip->ihl << 2));
2851                                 if (ntohs(udp->dest) == 67) {
2852                                         offset = (uint8_t *)udp + 8 - skb->data;
2853                                         length = skb->len - offset;
2854
2855                                         return e1000_mng_write_dhcp_info(hw,
2856                                                         (uint8_t *)udp + 8,
2857                                                         length);
2858                                 }
2859                         }
2860                 }
2861         }
2862         return 0;
2863 }
2864
2865 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2866 static int
2867 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2868 {
2869         struct e1000_adapter *adapter = netdev_priv(netdev);
2870         struct e1000_tx_ring *tx_ring;
2871         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2872         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2873         unsigned int tx_flags = 0;
2874         unsigned int len = skb->len;
2875         unsigned long flags;
2876         unsigned int nr_frags = 0;
2877         unsigned int mss = 0;
2878         int count = 0;
2879         int tso;
2880         unsigned int f;
2881         len -= skb->data_len;
2882
2883 #ifdef CONFIG_E1000_MQ
2884         tx_ring = *per_cpu_ptr(adapter->cpu_tx_ring, smp_processor_id());
2885 #else
2886         tx_ring = adapter->tx_ring;
2887 #endif
2888
2889         if (unlikely(skb->len <= 0)) {
2890                 dev_kfree_skb_any(skb);
2891                 return NETDEV_TX_OK;
2892         }
2893
2894 #ifdef NETIF_F_TSO
2895         mss = skb_shinfo(skb)->tso_size;
2896         /* The controller does a simple calculation to
2897          * make sure there is enough room in the FIFO before
2898          * initiating the DMA for each buffer.  The calc is:
2899          * 4 = ceil(buffer len/mss).  To make sure we don't
2900          * overrun the FIFO, adjust the max buffer len if mss
2901          * drops. */
2902         if (mss) {
2903                 uint8_t hdr_len;
2904                 max_per_txd = min(mss << 2, max_per_txd);
2905                 max_txd_pwr = fls(max_per_txd) - 1;
2906
2907         /* TSO Workaround for 82571/2 Controllers -- if skb->data
2908          * points to just header, pull a few bytes of payload from
2909          * frags into skb->data */
2910                 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2911                 if (skb->data_len && (hdr_len == (skb->len - skb->data_len)) &&
2912                         (adapter->hw.mac_type == e1000_82571 ||
2913                         adapter->hw.mac_type == e1000_82572)) {
2914                         unsigned int pull_size;
2915                         pull_size = min((unsigned int)4, skb->data_len);
2916                         if (!__pskb_pull_tail(skb, pull_size)) {
2917                                 printk(KERN_ERR "__pskb_pull_tail failed.\n");
2918                                 dev_kfree_skb_any(skb);
2919                                 return -EFAULT;
2920                         }
2921                         len = skb->len - skb->data_len;
2922                 }
2923         }
2924
2925         /* reserve a descriptor for the offload context */
2926         if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2927                 count++;
2928         count++;
2929 #else
2930         if (skb->ip_summed == CHECKSUM_HW)
2931                 count++;
2932 #endif
2933
2934 #ifdef NETIF_F_TSO
2935         /* Controller Erratum workaround */
2936         if (!skb->data_len && tx_ring->last_tx_tso &&
2937                 !skb_shinfo(skb)->tso_size)
2938                 count++;
2939 #endif
2940
2941         count += TXD_USE_COUNT(len, max_txd_pwr);
2942
2943         if (adapter->pcix_82544)
2944                 count++;
2945
2946         /* work-around for errata 10 and it applies to all controllers
2947          * in PCI-X mode, so add one more descriptor to the count
2948          */
2949         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2950                         (len > 2015)))
2951                 count++;
2952
2953         nr_frags = skb_shinfo(skb)->nr_frags;
2954         for (f = 0; f < nr_frags; f++)
2955                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2956                                        max_txd_pwr);
2957         if (adapter->pcix_82544)
2958                 count += nr_frags;
2959
2960         if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2961                 e1000_transfer_dhcp_info(adapter, skb);
2962
2963         local_irq_save(flags);
2964         if (!spin_trylock(&tx_ring->tx_lock)) {
2965                 /* Collision - tell upper layer to requeue */
2966                 local_irq_restore(flags);
2967                 return NETDEV_TX_LOCKED;
2968         }
2969
2970         /* need: count + 2 desc gap to keep tail from touching
2971          * head, otherwise try next time */
2972         if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2973                 netif_stop_queue(netdev);
2974                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2975                 return NETDEV_TX_BUSY;
2976         }
2977
2978         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2979                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2980                         netif_stop_queue(netdev);
2981                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2982                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2983                         return NETDEV_TX_BUSY;
2984                 }
2985         }
2986
2987         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2988                 tx_flags |= E1000_TX_FLAGS_VLAN;
2989                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2990         }
2991
2992         first = tx_ring->next_to_use;
2993
2994         tso = e1000_tso(adapter, tx_ring, skb);
2995         if (tso < 0) {
2996                 dev_kfree_skb_any(skb);
2997                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2998                 return NETDEV_TX_OK;
2999         }
3000
3001         if (likely(tso)) {
3002                 tx_ring->last_tx_tso = 1;
3003                 tx_flags |= E1000_TX_FLAGS_TSO;
3004         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3005                 tx_flags |= E1000_TX_FLAGS_CSUM;
3006
3007         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3008          * 82571 hardware supports TSO capabilities for IPv6 as well...
3009          * no longer assume, we must. */
3010         if (likely(skb->protocol == ntohs(ETH_P_IP)))
3011                 tx_flags |= E1000_TX_FLAGS_IPV4;
3012
3013         e1000_tx_queue(adapter, tx_ring, tx_flags,
3014                        e1000_tx_map(adapter, tx_ring, skb, first,
3015                                     max_per_txd, nr_frags, mss));
3016
3017         netdev->trans_start = jiffies;
3018
3019         /* Make sure there is space in the ring for the next send. */
3020         if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
3021                 netif_stop_queue(netdev);
3022
3023         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3024         return NETDEV_TX_OK;
3025 }
3026
3027 /**
3028  * e1000_tx_timeout - Respond to a Tx Hang
3029  * @netdev: network interface device structure
3030  **/
3031
3032 static void
3033 e1000_tx_timeout(struct net_device *netdev)
3034 {
3035         struct e1000_adapter *adapter = netdev_priv(netdev);
3036
3037         /* Do the reset outside of interrupt context */
3038         schedule_work(&adapter->tx_timeout_task);
3039 }
3040
3041 static void
3042 e1000_tx_timeout_task(struct net_device *netdev)
3043 {
3044         struct e1000_adapter *adapter = netdev_priv(netdev);
3045
3046         adapter->tx_timeout_count++;
3047         e1000_down(adapter);
3048         e1000_up(adapter);
3049 }
3050
3051 /**
3052  * e1000_get_stats - Get System Network Statistics
3053  * @netdev: network interface device structure
3054  *
3055  * Returns the address of the device statistics structure.
3056  * The statistics are actually updated from the timer callback.
3057  **/
3058
3059 static struct net_device_stats *
3060 e1000_get_stats(struct net_device *netdev)
3061 {
3062         struct e1000_adapter *adapter = netdev_priv(netdev);
3063
3064         /* only return the current stats */
3065         return &adapter->net_stats;
3066 }
3067
3068 /**
3069  * e1000_change_mtu - Change the Maximum Transfer Unit
3070  * @netdev: network interface device structure
3071  * @new_mtu: new value for maximum frame size
3072  *
3073  * Returns 0 on success, negative on failure
3074  **/
3075
3076 static int
3077 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3078 {
3079         struct e1000_adapter *adapter = netdev_priv(netdev);
3080         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3081
3082         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3083             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3084                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3085                 return -EINVAL;
3086         }
3087
3088         /* Adapter-specific max frame size limits. */
3089         switch (adapter->hw.mac_type) {
3090         case e1000_82542_rev2_0:
3091         case e1000_82542_rev2_1:
3092         case e1000_82573:
3093                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3094                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3095                         return -EINVAL;
3096                 }
3097                 break;
3098         case e1000_82571:
3099         case e1000_82572:
3100 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3101                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3102                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3103                         return -EINVAL;
3104                 }
3105                 break;
3106         default:
3107                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3108                 break;
3109         }
3110
3111         /* since the driver code now supports splitting a packet across
3112          * multiple descriptors, most of the fifo related limitations on
3113          * jumbo frame traffic have gone away.
3114          * simply use 2k descriptors for everything.
3115          *
3116          * NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3117          * means we reserve 2 more, this pushes us to allocate from the next
3118          * larger slab size
3119          * i.e. RXBUFFER_2048 --> size-4096 slab */
3120
3121         /* recent hardware supports 1KB granularity */
3122         if (adapter->hw.mac_type > e1000_82547_rev_2) {
3123                 adapter->rx_buffer_len =
3124                     ((max_frame < E1000_RXBUFFER_2048) ?
3125                         max_frame : E1000_RXBUFFER_2048);
3126                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3127         } else
3128                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3129
3130         netdev->mtu = new_mtu;
3131
3132         if (netif_running(netdev)) {
3133                 e1000_down(adapter);
3134                 e1000_up(adapter);
3135         }
3136
3137         adapter->hw.max_frame_size = max_frame;
3138
3139         return 0;
3140 }
3141
3142 /**
3143  * e1000_update_stats - Update the board statistics counters
3144  * @adapter: board private structure
3145  **/
3146
3147 void
3148 e1000_update_stats(struct e1000_adapter *adapter)
3149 {
3150         struct e1000_hw *hw = &adapter->hw;
3151         unsigned long flags;
3152         uint16_t phy_tmp;
3153
3154 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3155
3156         spin_lock_irqsave(&adapter->stats_lock, flags);
3157
3158         /* these counters are modified from e1000_adjust_tbi_stats,
3159          * called from the interrupt context, so they must only
3160          * be written while holding adapter->stats_lock
3161          */
3162
3163         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3164         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3165         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3166         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3167         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3168         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3169         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3170         adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3171         adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3172         adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3173         adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3174         adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3175         adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3176
3177         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3178         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3179         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3180         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3181         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3182         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3183         adapter->stats.dc += E1000_READ_REG(hw, DC);
3184         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3185         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3186         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3187         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3188         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3189         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3190         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3191         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3192         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3193         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3194         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3195         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3196         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3197         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3198         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3199         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3200         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3201         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3202         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3203         adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3204         adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3205         adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3206         adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3207         adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3208         adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3209         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3210         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3211
3212         /* used for adaptive IFS */
3213
3214         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3215         adapter->stats.tpt += hw->tx_packet_delta;
3216         hw->collision_delta = E1000_READ_REG(hw, COLC);
3217         adapter->stats.colc += hw->collision_delta;
3218
3219         if (hw->mac_type >= e1000_82543) {
3220                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3221                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3222                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3223                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3224                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3225                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3226         }
3227         if (hw->mac_type > e1000_82547_rev_2) {
3228                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3229                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3230                 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3231                 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3232                 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3233                 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3234                 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3235                 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3236                 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3237         }
3238
3239         /* Fill out the OS statistics structure */
3240
3241         adapter->net_stats.rx_packets = adapter->stats.gprc;
3242         adapter->net_stats.tx_packets = adapter->stats.gptc;
3243         adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3244         adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3245         adapter->net_stats.multicast = adapter->stats.mprc;
3246         adapter->net_stats.collisions = adapter->stats.colc;
3247
3248         /* Rx Errors */
3249
3250         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3251                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3252                 adapter->stats.rlec + adapter->stats.cexterr;
3253         adapter->net_stats.rx_dropped = 0;
3254         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3255         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3256         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3257         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3258
3259         /* Tx Errors */
3260
3261         adapter->net_stats.tx_errors = adapter->stats.ecol +
3262                                        adapter->stats.latecol;
3263         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3264         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3265         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3266
3267         /* Tx Dropped needs to be maintained elsewhere */
3268
3269         /* Phy Stats */
3270
3271         if (hw->media_type == e1000_media_type_copper) {
3272                 if ((adapter->link_speed == SPEED_1000) &&
3273                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3274                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3275                         adapter->phy_stats.idle_errors += phy_tmp;
3276                 }
3277
3278                 if ((hw->mac_type <= e1000_82546) &&
3279                    (hw->phy_type == e1000_phy_m88) &&
3280                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3281                         adapter->phy_stats.receive_errors += phy_tmp;
3282         }
3283
3284         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3285 }
3286
3287 #ifdef CONFIG_E1000_MQ
3288 void
3289 e1000_rx_schedule(void *data)
3290 {
3291         struct net_device *poll_dev, *netdev = data;
3292         struct e1000_adapter *adapter = netdev->priv;
3293         int this_cpu = get_cpu();
3294
3295         poll_dev = *per_cpu_ptr(adapter->cpu_netdev, this_cpu);
3296         if (poll_dev == NULL) {
3297                 put_cpu();
3298                 return;
3299         }
3300
3301         if (likely(netif_rx_schedule_prep(poll_dev)))
3302                 __netif_rx_schedule(poll_dev);
3303         else
3304                 e1000_irq_enable(adapter);
3305
3306         put_cpu();
3307 }
3308 #endif
3309
3310 /**
3311  * e1000_intr - Interrupt Handler
3312  * @irq: interrupt number
3313  * @data: pointer to a network interface device structure
3314  * @pt_regs: CPU registers structure
3315  **/
3316
3317 static irqreturn_t
3318 e1000_intr(int irq, void *data, struct pt_regs *regs)
3319 {
3320         struct net_device *netdev = data;
3321         struct e1000_adapter *adapter = netdev_priv(netdev);
3322         struct e1000_hw *hw = &adapter->hw;
3323         uint32_t icr = E1000_READ_REG(hw, ICR);
3324 #ifndef CONFIG_E1000_NAPI
3325         int i;
3326 #else
3327         /* Interrupt Auto-Mask...upon reading ICR,
3328          * interrupts are masked.  No need for the
3329          * IMC write, but it does mean we should
3330          * account for it ASAP. */
3331         if (likely(hw->mac_type >= e1000_82571))
3332                 atomic_inc(&adapter->irq_sem);
3333 #endif
3334
3335         if (unlikely(!icr)) {
3336 #ifdef CONFIG_E1000_NAPI
3337                 if (hw->mac_type >= e1000_82571)
3338                         e1000_irq_enable(adapter);
3339 #endif
3340                 return IRQ_NONE;  /* Not our interrupt */
3341         }
3342
3343         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3344                 hw->get_link_status = 1;
3345                 mod_timer(&adapter->watchdog_timer, jiffies);
3346         }
3347
3348 #ifdef CONFIG_E1000_NAPI
3349         if (unlikely(hw->mac_type < e1000_82571)) {
3350                 atomic_inc(&adapter->irq_sem);
3351                 E1000_WRITE_REG(hw, IMC, ~0);
3352                 E1000_WRITE_FLUSH(hw);
3353         }
3354 #ifdef CONFIG_E1000_MQ
3355         if (atomic_read(&adapter->rx_sched_call_data.count) == 0) {
3356                 /* We must setup the cpumask once count == 0 since
3357                  * each cpu bit is cleared when the work is done. */
3358                 adapter->rx_sched_call_data.cpumask = adapter->cpumask;
3359                 atomic_add(adapter->num_rx_queues - 1, &adapter->irq_sem);
3360                 atomic_set(&adapter->rx_sched_call_data.count,
3361                            adapter->num_rx_queues);
3362                 smp_call_async_mask(&adapter->rx_sched_call_data);
3363         } else {
3364                 printk("call_data.count == %u\n", atomic_read(&adapter->rx_sched_call_data.count));
3365         }
3366 #else /* if !CONFIG_E1000_MQ */
3367         if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3368                 __netif_rx_schedule(&adapter->polling_netdev[0]);
3369         else
3370                 e1000_irq_enable(adapter);
3371 #endif /* CONFIG_E1000_MQ */
3372
3373 #else /* if !CONFIG_E1000_NAPI */
3374         /* Writing IMC and IMS is needed for 82547.
3375          * Due to Hub Link bus being occupied, an interrupt
3376          * de-assertion message is not able to be sent.
3377          * When an interrupt assertion message is generated later,
3378          * two messages are re-ordered and sent out.
3379          * That causes APIC to think 82547 is in de-assertion
3380          * state, while 82547 is in assertion state, resulting
3381          * in dead lock. Writing IMC forces 82547 into
3382          * de-assertion state.
3383          */
3384         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3385                 atomic_inc(&adapter->irq_sem);
3386                 E1000_WRITE_REG(hw, IMC, ~0);
3387         }
3388
3389         for (i = 0; i < E1000_MAX_INTR; i++)
3390                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3391                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3392                         break;
3393
3394         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3395                 e1000_irq_enable(adapter);
3396
3397 #endif /* CONFIG_E1000_NAPI */
3398
3399         return IRQ_HANDLED;
3400 }
3401
3402 #ifdef CONFIG_E1000_NAPI
3403 /**
3404  * e1000_clean - NAPI Rx polling callback
3405  * @adapter: board private structure
3406  **/
3407
3408 static int
3409 e1000_clean(struct net_device *poll_dev, int *budget)
3410 {
3411         struct e1000_adapter *adapter;
3412         int work_to_do = min(*budget, poll_dev->quota);
3413         int tx_cleaned = 0, i = 0, work_done = 0;
3414
3415         /* Must NOT use netdev_priv macro here. */
3416         adapter = poll_dev->priv;
3417
3418         /* Keep link state information with original netdev */
3419         if (!netif_carrier_ok(adapter->netdev))
3420                 goto quit_polling;
3421
3422         while (poll_dev != &adapter->polling_netdev[i]) {
3423                 i++;
3424                 if (unlikely(i == adapter->num_rx_queues))
3425                         BUG();
3426         }
3427
3428         if (likely(adapter->num_tx_queues == 1)) {
3429                 /* e1000_clean is called per-cpu.  This lock protects
3430                  * tx_ring[0] from being cleaned by multiple cpus
3431                  * simultaneously.  A failure obtaining the lock means
3432                  * tx_ring[0] is currently being cleaned anyway. */
3433                 if (spin_trylock(&adapter->tx_queue_lock)) {
3434                         tx_cleaned = e1000_clean_tx_irq(adapter,
3435                                                         &adapter->tx_ring[0]);
3436                         spin_unlock(&adapter->tx_queue_lock);
3437                 }
3438         } else
3439                 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3440
3441         adapter->clean_rx(adapter, &adapter->rx_ring[i],
3442                           &work_done, work_to_do);
3443
3444         *budget -= work_done;
3445         poll_dev->quota -= work_done;
3446
3447         /* If no Tx and not enough Rx work done, exit the polling mode */
3448         if ((!tx_cleaned && (work_done == 0)) ||
3449            !netif_running(adapter->netdev)) {
3450 quit_polling:
3451                 netif_rx_complete(poll_dev);
3452                 e1000_irq_enable(adapter);
3453                 return 0;
3454         }
3455
3456         return 1;
3457 }
3458
3459 #endif
3460 /**
3461  * e1000_clean_tx_irq - Reclaim resources after transmit completes
3462  * @adapter: board private structure
3463  **/
3464
3465 static boolean_t
3466 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3467                    struct e1000_tx_ring *tx_ring)
3468 {
3469         struct net_device *netdev = adapter->netdev;
3470         struct e1000_tx_desc *tx_desc, *eop_desc;
3471         struct e1000_buffer *buffer_info;
3472         unsigned int i, eop;
3473         boolean_t cleaned = FALSE;
3474
3475         i = tx_ring->next_to_clean;
3476         eop = tx_ring->buffer_info[i].next_to_watch;
3477         eop_desc = E1000_TX_DESC(*tx_ring, eop);
3478
3479         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3480                 for (cleaned = FALSE; !cleaned; ) {
3481                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3482                         buffer_info = &tx_ring->buffer_info[i];
3483                         cleaned = (i == eop);
3484
3485 #ifdef CONFIG_E1000_MQ
3486                         tx_ring->tx_stats.bytes += buffer_info->length;
3487 #endif
3488                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3489                         memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3490
3491                         if (unlikely(++i == tx_ring->count)) i = 0;
3492                 }
3493
3494 #ifdef CONFIG_E1000_MQ
3495                 tx_ring->tx_stats.packets++;
3496 #endif
3497
3498                 eop = tx_ring->buffer_info[i].next_to_watch;
3499                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3500         }
3501
3502         tx_ring->next_to_clean = i;
3503
3504         spin_lock(&tx_ring->tx_lock);
3505
3506         if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3507                     netif_carrier_ok(netdev)))
3508                 netif_wake_queue(netdev);
3509
3510         spin_unlock(&tx_ring->tx_lock);
3511
3512         if (adapter->detect_tx_hung) {
3513                 /* Detect a transmit hang in hardware, this serializes the
3514                  * check with the clearing of time_stamp and movement of i */
3515                 adapter->detect_tx_hung = FALSE;
3516                 if (tx_ring->buffer_info[eop].dma &&
3517                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3518                                adapter->tx_timeout_factor * HZ)
3519                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
3520                          E1000_STATUS_TXOFF)) {
3521
3522                         /* detected Tx unit hang */
3523                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3524                                         "  Tx Queue             <%lu>\n"
3525                                         "  TDH                  <%x>\n"
3526                                         "  TDT                  <%x>\n"
3527                                         "  next_to_use          <%x>\n"
3528                                         "  next_to_clean        <%x>\n"
3529                                         "buffer_info[next_to_clean]\n"
3530                                         "  time_stamp           <%lx>\n"
3531                                         "  next_to_watch        <%x>\n"
3532                                         "  jiffies              <%lx>\n"
3533                                         "  next_to_watch.status <%x>\n",
3534                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3535                                         sizeof(struct e1000_tx_ring)),
3536                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
3537                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
3538                                 tx_ring->next_to_use,
3539                                 tx_ring->next_to_clean,
3540                                 tx_ring->buffer_info[eop].time_stamp,
3541                                 eop,
3542                                 jiffies,
3543                                 eop_desc->upper.fields.status);
3544                         netif_stop_queue(netdev);
3545                 }
3546         }
3547         return cleaned;
3548 }
3549
3550 /**
3551  * e1000_rx_checksum - Receive Checksum Offload for 82543
3552  * @adapter:     board private structure
3553  * @status_err:  receive descriptor status and error fields
3554  * @csum:        receive descriptor csum field
3555  * @sk_buff:     socket buffer with received data
3556  **/
3557
3558 static inline void
3559 e1000_rx_checksum(struct e1000_adapter *adapter,
3560                   uint32_t status_err, uint32_t csum,
3561                   struct sk_buff *skb)
3562 {
3563         uint16_t status = (uint16_t)status_err;
3564         uint8_t errors = (uint8_t)(status_err >> 24);
3565         skb->ip_summed = CHECKSUM_NONE;
3566
3567         /* 82543 or newer only */
3568         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3569         /* Ignore Checksum bit is set */
3570         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3571         /* TCP/UDP checksum error bit is set */
3572         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3573                 /* let the stack verify checksum errors */
3574                 adapter->hw_csum_err++;
3575                 return;
3576         }
3577         /* TCP/UDP Checksum has not been calculated */
3578         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3579                 if (!(status & E1000_RXD_STAT_TCPCS))
3580                         return;
3581         } else {
3582                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3583                         return;
3584         }
3585         /* It must be a TCP or UDP packet with a valid checksum */
3586         if (likely(status & E1000_RXD_STAT_TCPCS)) {
3587                 /* TCP checksum is good */
3588                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3589         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3590                 /* IP fragment with UDP payload */
3591                 /* Hardware complements the payload checksum, so we undo it
3592                  * and then put the value in host order for further stack use.
3593                  */
3594                 csum = ntohl(csum ^ 0xFFFF);
3595                 skb->csum = csum;
3596                 skb->ip_summed = CHECKSUM_HW;
3597         }
3598         adapter->hw_csum_good++;
3599 }
3600
3601 /**
3602  * e1000_clean_rx_irq - Send received data up the network stack; legacy
3603  * @adapter: board private structure
3604  **/
3605
3606 static boolean_t
3607 #ifdef CONFIG_E1000_NAPI
3608 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3609                    struct e1000_rx_ring *rx_ring,
3610                    int *work_done, int work_to_do)
3611 #else
3612 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3613                    struct e1000_rx_ring *rx_ring)
3614 #endif
3615 {
3616         struct net_device *netdev = adapter->netdev;
3617         struct pci_dev *pdev = adapter->pdev;
3618         struct e1000_rx_desc *rx_desc;
3619         struct e1000_buffer *buffer_info;
3620         unsigned long flags;
3621         uint32_t length;
3622         uint8_t last_byte;
3623         unsigned int i;
3624         int cleaned_count = 0;
3625         boolean_t cleaned = FALSE, multi_descriptor = FALSE;
3626
3627         i = rx_ring->next_to_clean;
3628         rx_desc = E1000_RX_DESC(*rx_ring, i);
3629         buffer_info = &rx_ring->buffer_info[i];
3630
3631         while (rx_desc->status & E1000_RXD_STAT_DD) {
3632                 struct sk_buff *skb;
3633                 u8 status;
3634 #ifdef CONFIG_E1000_NAPI
3635                 if (*work_done >= work_to_do)
3636                         break;
3637                 (*work_done)++;
3638 #endif
3639                 status = rx_desc->status;
3640                 skb = buffer_info->skb;
3641                 cleaned = TRUE;
3642                 cleaned_count++;
3643                 pci_unmap_single(pdev,
3644                                  buffer_info->dma,
3645                                  buffer_info->length,
3646                                  PCI_DMA_FROMDEVICE);
3647
3648                 length = le16_to_cpu(rx_desc->length);
3649
3650                 skb_put(skb, length);
3651
3652                 if (!(status & E1000_RXD_STAT_EOP)) {
3653                         if (!rx_ring->rx_skb_top) {
3654                                 rx_ring->rx_skb_top = skb;
3655                                 rx_ring->rx_skb_top->len = length;
3656                                 rx_ring->rx_skb_prev = skb;
3657                         } else {
3658                                 if (skb_shinfo(rx_ring->rx_skb_top)->frag_list) {
3659                                         rx_ring->rx_skb_prev->next = skb;
3660                                         skb->prev = rx_ring->rx_skb_prev;
3661                                 } else {
3662                                         skb_shinfo(rx_ring->rx_skb_top)->frag_list = skb;
3663                                 }
3664                                 rx_ring->rx_skb_prev = skb;
3665                                 rx_ring->rx_skb_top->data_len += length;
3666                         }
3667                         goto next_desc;
3668                 } else {
3669                         if (rx_ring->rx_skb_top) {
3670                                 if (skb_shinfo(rx_ring->rx_skb_top)
3671                                                         ->frag_list) {
3672                                         rx_ring->rx_skb_prev->next = skb;
3673                                         skb->prev = rx_ring->rx_skb_prev;
3674                                 } else
3675                                         skb_shinfo(rx_ring->rx_skb_top)
3676                                                         ->frag_list = skb;
3677
3678                                 rx_ring->rx_skb_top->data_len += length;
3679                                 rx_ring->rx_skb_top->len +=
3680                                         rx_ring->rx_skb_top->data_len;
3681
3682                                 skb = rx_ring->rx_skb_top;
3683                                 multi_descriptor = TRUE;
3684                                 rx_ring->rx_skb_top = NULL;
3685                                 rx_ring->rx_skb_prev = NULL;
3686                         }
3687                 }
3688
3689                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3690                         last_byte = *(skb->data + length - 1);
3691                         if (TBI_ACCEPT(&adapter->hw, status,
3692                                       rx_desc->errors, length, last_byte)) {
3693                                 spin_lock_irqsave(&adapter->stats_lock, flags);
3694                                 e1000_tbi_adjust_stats(&adapter->hw,
3695                                                        &adapter->stats,
3696                                                        length, skb->data);
3697                                 spin_unlock_irqrestore(&adapter->stats_lock,
3698                                                        flags);
3699                                 length--;
3700                         } else {
3701                                 dev_kfree_skb_irq(skb);
3702                                 goto next_desc;
3703                         }
3704                 }
3705
3706                 /* code added for copybreak, this should improve
3707                  * performance for small packets with large amounts
3708                  * of reassembly being done in the stack */
3709 #define E1000_CB_LENGTH 256
3710                 if ((length < E1000_CB_LENGTH) &&
3711                    !rx_ring->rx_skb_top &&
3712                    /* or maybe (status & E1000_RXD_STAT_EOP) && */
3713                    !multi_descriptor) {
3714                         struct sk_buff *new_skb =
3715                             dev_alloc_skb(length + NET_IP_ALIGN);
3716                         if (new_skb) {
3717                                 skb_reserve(new_skb, NET_IP_ALIGN);
3718                                 new_skb->dev = netdev;
3719                                 memcpy(new_skb->data - NET_IP_ALIGN,
3720                                        skb->data - NET_IP_ALIGN,
3721                                        length + NET_IP_ALIGN);
3722                                 /* save the skb in buffer_info as good */
3723                                 buffer_info->skb = skb;
3724                                 skb = new_skb;
3725                                 skb_put(skb, length);
3726                         }
3727                 }
3728
3729                 /* end copybreak code */
3730
3731                 /* Receive Checksum Offload */
3732                 e1000_rx_checksum(adapter,
3733                                   (uint32_t)(status) |
3734                                   ((uint32_t)(rx_desc->errors) << 24),
3735                                   rx_desc->csum, skb);
3736
3737                 skb->protocol = eth_type_trans(skb, netdev);
3738 #ifdef CONFIG_E1000_NAPI
3739                 if (unlikely(adapter->vlgrp &&
3740                             (status & E1000_RXD_STAT_VP))) {
3741                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3742                                                  le16_to_cpu(rx_desc->special) &
3743                                                  E1000_RXD_SPC_VLAN_MASK);
3744                 } else {
3745                         netif_receive_skb(skb);
3746                 }
3747 #else /* CONFIG_E1000_NAPI */
3748                 if (unlikely(adapter->vlgrp &&
3749                             (status & E1000_RXD_STAT_VP))) {
3750                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3751                                         le16_to_cpu(rx_desc->special) &
3752                                         E1000_RXD_SPC_VLAN_MASK);
3753                 } else {
3754                         netif_rx(skb);
3755                 }
3756 #endif /* CONFIG_E1000_NAPI */
3757                 netdev->last_rx = jiffies;
3758 #ifdef CONFIG_E1000_MQ
3759                 rx_ring->rx_stats.packets++;
3760                 rx_ring->rx_stats.bytes += length;
3761 #endif
3762
3763 next_desc:
3764                 rx_desc->status = 0;
3765
3766                 /* return some buffers to hardware, one at a time is too slow */
3767                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3768                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3769                         cleaned_count = 0;
3770                 }
3771
3772         }
3773         rx_ring->next_to_clean = i;
3774
3775         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3776         if (cleaned_count)
3777                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3778
3779         return cleaned;
3780 }
3781
3782 /**
3783  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3784  * @adapter: board private structure
3785  **/
3786
3787 static boolean_t
3788 #ifdef CONFIG_E1000_NAPI
3789 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3790                       struct e1000_rx_ring *rx_ring,
3791                       int *work_done, int work_to_do)
3792 #else
3793 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3794                       struct e1000_rx_ring *rx_ring)
3795 #endif
3796 {
3797         union e1000_rx_desc_packet_split *rx_desc;
3798         struct net_device *netdev = adapter->netdev;
3799         struct pci_dev *pdev = adapter->pdev;
3800         struct e1000_buffer *buffer_info;
3801         struct e1000_ps_page *ps_page;
3802         struct e1000_ps_page_dma *ps_page_dma;
3803         struct sk_buff *skb;
3804         unsigned int i, j;
3805         uint32_t length, staterr;
3806         int cleaned_count = 0;
3807         boolean_t cleaned = FALSE;
3808
3809         i = rx_ring->next_to_clean;
3810         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3811         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3812
3813         while (staterr & E1000_RXD_STAT_DD) {
3814                 buffer_info = &rx_ring->buffer_info[i];
3815                 ps_page = &rx_ring->ps_page[i];
3816                 ps_page_dma = &rx_ring->ps_page_dma[i];
3817 #ifdef CONFIG_E1000_NAPI
3818                 if (unlikely(*work_done >= work_to_do))
3819                         break;
3820                 (*work_done)++;
3821 #endif
3822                 cleaned = TRUE;
3823                 cleaned_count++;
3824                 pci_unmap_single(pdev, buffer_info->dma,
3825                                  buffer_info->length,
3826                                  PCI_DMA_FROMDEVICE);
3827
3828                 skb = buffer_info->skb;
3829
3830                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3831                         E1000_DBG("%s: Packet Split buffers didn't pick up"
3832                                   " the full packet\n", netdev->name);
3833                         dev_kfree_skb_irq(skb);
3834                         goto next_desc;
3835                 }
3836
3837                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3838                         dev_kfree_skb_irq(skb);
3839                         goto next_desc;
3840                 }
3841
3842                 length = le16_to_cpu(rx_desc->wb.middle.length0);
3843
3844                 if (unlikely(!length)) {
3845                         E1000_DBG("%s: Last part of the packet spanning"
3846                                   " multiple descriptors\n", netdev->name);
3847                         dev_kfree_skb_irq(skb);
3848                         goto next_desc;
3849                 }
3850
3851                 /* Good Receive */
3852                 skb_put(skb, length);
3853
3854                 for (j = 0; j < adapter->rx_ps_pages; j++) {
3855                         if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3856                                 break;
3857
3858                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3859                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
3860                         ps_page_dma->ps_page_dma[j] = 0;
3861                         skb_shinfo(skb)->frags[j].page =
3862                                 ps_page->ps_page[j];
3863                         ps_page->ps_page[j] = NULL;
3864                         skb_shinfo(skb)->frags[j].page_offset = 0;
3865                         skb_shinfo(skb)->frags[j].size = length;
3866                         skb_shinfo(skb)->nr_frags++;
3867                         skb->len += length;
3868                         skb->data_len += length;
3869                 }
3870
3871                 e1000_rx_checksum(adapter, staterr,
3872                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3873                 skb->protocol = eth_type_trans(skb, netdev);
3874
3875                 if (likely(rx_desc->wb.upper.header_status &
3876                           E1000_RXDPS_HDRSTAT_HDRSP))
3877                         adapter->rx_hdr_split++;
3878 #ifdef CONFIG_E1000_NAPI
3879                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3880                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3881                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3882                                 E1000_RXD_SPC_VLAN_MASK);
3883                 } else {
3884                         netif_receive_skb(skb);
3885                 }
3886 #else /* CONFIG_E1000_NAPI */
3887                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3888                         vlan_hwaccel_rx(skb, adapter->vlgrp,
3889                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
3890                                 E1000_RXD_SPC_VLAN_MASK);
3891                 } else {
3892                         netif_rx(skb);
3893                 }
3894 #endif /* CONFIG_E1000_NAPI */
3895                 netdev->last_rx = jiffies;
3896 #ifdef CONFIG_E1000_MQ
3897                 rx_ring->rx_stats.packets++;
3898                 rx_ring->rx_stats.bytes += length;
3899 #endif
3900
3901 next_desc:
3902                 rx_desc->wb.middle.status_error &= ~0xFF;
3903                 buffer_info->skb = NULL;
3904
3905                 /* return some buffers to hardware, one at a time is too slow */
3906                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3907                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3908                         cleaned_count = 0;
3909                 }
3910
3911                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3912         }
3913         rx_ring->next_to_clean = i;
3914
3915         cleaned_count = E1000_DESC_UNUSED(rx_ring);
3916         if (cleaned_count)
3917                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3918
3919         return cleaned;
3920 }
3921
3922 /**
3923  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3924  * @adapter: address of board private structure
3925  **/
3926
3927 static void
3928 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3929                        struct e1000_rx_ring *rx_ring,
3930                        int cleaned_count)
3931 {
3932         struct net_device *netdev = adapter->netdev;
3933         struct pci_dev *pdev = adapter->pdev;
3934         struct e1000_rx_desc *rx_desc;
3935         struct e1000_buffer *buffer_info;
3936         struct sk_buff *skb;
3937         unsigned int i;
3938         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3939
3940         i = rx_ring->next_to_use;
3941         buffer_info = &rx_ring->buffer_info[i];
3942
3943         while (cleaned_count--) {
3944                 if (!(skb = buffer_info->skb))
3945                         skb = dev_alloc_skb(bufsz);
3946                 else {
3947                         skb_trim(skb, 0);
3948                         goto map_skb;
3949                 }
3950
3951
3952                 if (unlikely(!skb)) {
3953                         /* Better luck next round */
3954                         adapter->alloc_rx_buff_failed++;
3955                         break;
3956                 }
3957
3958                 /* Fix for errata 23, can't cross 64kB boundary */
3959                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3960                         struct sk_buff *oldskb = skb;
3961                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3962                                              "at %p\n", bufsz, skb->data);
3963                         /* Try again, without freeing the previous */
3964                         skb = dev_alloc_skb(bufsz);
3965                         /* Failed allocation, critical failure */
3966                         if (!skb) {
3967                                 dev_kfree_skb(oldskb);
3968                                 break;
3969                         }
3970
3971                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3972                                 /* give up */
3973                                 dev_kfree_skb(skb);
3974                                 dev_kfree_skb(oldskb);
3975                                 break; /* while !buffer_info->skb */
3976                         } else {
3977                                 /* Use new allocation */
3978                                 dev_kfree_skb(oldskb);
3979                         }
3980                 }
3981                 /* Make buffer alignment 2 beyond a 16 byte boundary
3982                  * this will result in a 16 byte aligned IP header after
3983                  * the 14 byte MAC header is removed
3984                  */
3985                 skb_reserve(skb, NET_IP_ALIGN);
3986
3987                 skb->dev = netdev;
3988
3989                 buffer_info->skb = skb;
3990                 buffer_info->length = adapter->rx_buffer_len;
3991 map_skb:
3992                 buffer_info->dma = pci_map_single(pdev,
3993                                                   skb->data,
3994                                                   adapter->rx_buffer_len,
3995                                                   PCI_DMA_FROMDEVICE);
3996
3997                 /* Fix for errata 23, can't cross 64kB boundary */
3998                 if (!e1000_check_64k_bound(adapter,
3999                                         (void *)(unsigned long)buffer_info->dma,
4000                                         adapter->rx_buffer_len)) {
4001                         DPRINTK(RX_ERR, ERR,
4002                                 "dma align check failed: %u bytes at %p\n",
4003                                 adapter->rx_buffer_len,
4004                                 (void *)(unsigned long)buffer_info->dma);
4005                         dev_kfree_skb(skb);
4006                         buffer_info->skb = NULL;
4007
4008                         pci_unmap_single(pdev, buffer_info->dma,
4009                                          adapter->rx_buffer_len,
4010                                          PCI_DMA_FROMDEVICE);
4011
4012                         break; /* while !buffer_info->skb */
4013                 }
4014                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4015                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4016
4017                 if (unlikely(++i == rx_ring->count))
4018                         i = 0;
4019                 buffer_info = &rx_ring->buffer_info[i];
4020         }
4021
4022         if (likely(rx_ring->next_to_use != i)) {
4023                 rx_ring->next_to_use = i;
4024                 if (unlikely(i-- == 0))
4025                         i = (rx_ring->count - 1);
4026
4027                 /* Force memory writes to complete before letting h/w
4028                  * know there are new descriptors to fetch.  (Only
4029                  * applicable for weak-ordered memory model archs,
4030                  * such as IA-64). */
4031                 wmb();
4032                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4033         }
4034 }
4035
4036 /**
4037  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4038  * @adapter: address of board private structure
4039  **/
4040
4041 static void
4042 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4043                           struct e1000_rx_ring *rx_ring,
4044                           int cleaned_count)
4045 {
4046         struct net_device *netdev = adapter->netdev;
4047         struct pci_dev *pdev = adapter->pdev;
4048         union e1000_rx_desc_packet_split *rx_desc;
4049         struct e1000_buffer *buffer_info;
4050         struct e1000_ps_page *ps_page;
4051         struct e1000_ps_page_dma *ps_page_dma;
4052         struct sk_buff *skb;
4053         unsigned int i, j;
4054
4055         i = rx_ring->next_to_use;
4056         buffer_info = &rx_ring->buffer_info[i];
4057         ps_page = &rx_ring->ps_page[i];
4058         ps_page_dma = &rx_ring->ps_page_dma[i];
4059
4060         while (cleaned_count--) {
4061                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4062
4063                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4064                         if (j < adapter->rx_ps_pages) {
4065                                 if (likely(!ps_page->ps_page[j])) {
4066                                         ps_page->ps_page[j] =
4067                                                 alloc_page(GFP_ATOMIC);
4068                                         if (unlikely(!ps_page->ps_page[j])) {
4069                                                 adapter->alloc_rx_buff_failed++;
4070                                                 goto no_buffers;
4071                                         }
4072                                         ps_page_dma->ps_page_dma[j] =
4073                                                 pci_map_page(pdev,
4074                                                             ps_page->ps_page[j],
4075                                                             0, PAGE_SIZE,
4076                                                             PCI_DMA_FROMDEVICE);
4077                                 }
4078                                 /* Refresh the desc even if buffer_addrs didn't
4079                                  * change because each write-back erases
4080                                  * this info.
4081                                  */
4082                                 rx_desc->read.buffer_addr[j+1] =
4083                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4084                         } else
4085                                 rx_desc->read.buffer_addr[j+1] = ~0;
4086                 }
4087
4088                 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4089
4090                 if (unlikely(!skb)) {
4091                         adapter->alloc_rx_buff_failed++;
4092                         break;
4093                 }
4094
4095                 /* Make buffer alignment 2 beyond a 16 byte boundary
4096                  * this will result in a 16 byte aligned IP header after
4097                  * the 14 byte MAC header is removed
4098                  */
4099                 skb_reserve(skb, NET_IP_ALIGN);
4100
4101                 skb->dev = netdev;
4102
4103                 buffer_info->skb = skb;
4104                 buffer_info->length = adapter->rx_ps_bsize0;
4105                 buffer_info->dma = pci_map_single(pdev, skb->data,
4106                                                   adapter->rx_ps_bsize0,
4107                                                   PCI_DMA_FROMDEVICE);
4108
4109                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4110
4111                 if (unlikely(++i == rx_ring->count)) i = 0;
4112                 buffer_info = &rx_ring->buffer_info[i];
4113                 ps_page = &rx_ring->ps_page[i];
4114                 ps_page_dma = &rx_ring->ps_page_dma[i];
4115         }
4116
4117 no_buffers:
4118         if (likely(rx_ring->next_to_use != i)) {
4119                 rx_ring->next_to_use = i;
4120                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4121
4122                 /* Force memory writes to complete before letting h/w
4123                  * know there are new descriptors to fetch.  (Only
4124                  * applicable for weak-ordered memory model archs,
4125                  * such as IA-64). */
4126                 wmb();
4127                 /* Hardware increments by 16 bytes, but packet split
4128                  * descriptors are 32 bytes...so we increment tail
4129                  * twice as much.
4130                  */
4131                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4132         }
4133 }
4134
4135 /**
4136  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4137  * @adapter:
4138  **/
4139
4140 static void
4141 e1000_smartspeed(struct e1000_adapter *adapter)
4142 {
4143         uint16_t phy_status;
4144         uint16_t phy_ctrl;
4145
4146         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4147            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4148                 return;
4149
4150         if (adapter->smartspeed == 0) {
4151                 /* If Master/Slave config fault is asserted twice,
4152                  * we assume back-to-back */
4153                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4154                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4155                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4156                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4157                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4158                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4159                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4160                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4161                                             phy_ctrl);
4162                         adapter->smartspeed++;
4163                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4164                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4165                                                &phy_ctrl)) {
4166                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4167                                              MII_CR_RESTART_AUTO_NEG);
4168                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4169                                                     phy_ctrl);
4170                         }
4171                 }
4172                 return;
4173         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4174                 /* If still no link, perhaps using 2/3 pair cable */
4175                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4176                 phy_ctrl |= CR_1000T_MS_ENABLE;
4177                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4178                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4179                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4180                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4181                                      MII_CR_RESTART_AUTO_NEG);
4182                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4183                 }
4184         }
4185         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4186         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4187                 adapter->smartspeed = 0;
4188 }
4189
4190 /**
4191  * e1000_ioctl -
4192  * @netdev:
4193  * @ifreq:
4194  * @cmd:
4195  **/
4196
4197 static int
4198 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4199 {
4200         switch (cmd) {
4201         case SIOCGMIIPHY:
4202         case SIOCGMIIREG:
4203         case SIOCSMIIREG:
4204                 return e1000_mii_ioctl(netdev, ifr, cmd);
4205         default:
4206                 return -EOPNOTSUPP;
4207         }
4208 }
4209
4210 /**
4211  * e1000_mii_ioctl -
4212  * @netdev:
4213  * @ifreq:
4214  * @cmd:
4215  **/
4216
4217 static int
4218 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4219 {
4220         struct e1000_adapter *adapter = netdev_priv(netdev);
4221         struct mii_ioctl_data *data = if_mii(ifr);
4222         int retval;
4223         uint16_t mii_reg;
4224         uint16_t spddplx;
4225         unsigned long flags;
4226
4227         if (adapter->hw.media_type != e1000_media_type_copper)
4228                 return -EOPNOTSUPP;
4229
4230         switch (cmd) {
4231         case SIOCGMIIPHY:
4232                 data->phy_id = adapter->hw.phy_addr;
4233                 break;
4234         case SIOCGMIIREG:
4235                 if (!capable(CAP_NET_ADMIN))
4236                         return -EPERM;
4237                 spin_lock_irqsave(&adapter->stats_lock, flags);
4238                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4239                                    &data->val_out)) {
4240                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4241                         return -EIO;
4242                 }
4243                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4244                 break;
4245         case SIOCSMIIREG:
4246                 if (!capable(CAP_NET_ADMIN))
4247                         return -EPERM;
4248                 if (data->reg_num & ~(0x1F))
4249                         return -EFAULT;
4250                 mii_reg = data->val_in;
4251                 spin_lock_irqsave(&adapter->stats_lock, flags);
4252                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4253                                         mii_reg)) {
4254                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4255                         return -EIO;
4256                 }
4257                 if (adapter->hw.phy_type == e1000_phy_m88) {
4258                         switch (data->reg_num) {
4259                         case PHY_CTRL:
4260                                 if (mii_reg & MII_CR_POWER_DOWN)
4261                                         break;
4262                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4263                                         adapter->hw.autoneg = 1;
4264                                         adapter->hw.autoneg_advertised = 0x2F;
4265                                 } else {
4266                                         if (mii_reg & 0x40)
4267                                                 spddplx = SPEED_1000;
4268                                         else if (mii_reg & 0x2000)
4269                                                 spddplx = SPEED_100;
4270                                         else
4271                                                 spddplx = SPEED_10;
4272                                         spddplx += (mii_reg & 0x100)
4273                                                    ? FULL_DUPLEX :
4274                                                    HALF_DUPLEX;
4275                                         retval = e1000_set_spd_dplx(adapter,
4276                                                                     spddplx);
4277                                         if (retval) {
4278                                                 spin_unlock_irqrestore(
4279                                                         &adapter->stats_lock,
4280                                                         flags);
4281                                                 return retval;
4282                                         }
4283                                 }
4284                                 if (netif_running(adapter->netdev)) {
4285                                         e1000_down(adapter);
4286                                         e1000_up(adapter);
4287                                 } else
4288                                         e1000_reset(adapter);
4289                                 break;
4290                         case M88E1000_PHY_SPEC_CTRL:
4291                         case M88E1000_EXT_PHY_SPEC_CTRL:
4292                                 if (e1000_phy_reset(&adapter->hw)) {
4293                                         spin_unlock_irqrestore(
4294                                                 &adapter->stats_lock, flags);
4295                                         return -EIO;
4296                                 }
4297                                 break;
4298                         }
4299                 } else {
4300                         switch (data->reg_num) {
4301                         case PHY_CTRL:
4302                                 if (mii_reg & MII_CR_POWER_DOWN)
4303                                         break;
4304                                 if (netif_running(adapter->netdev)) {
4305                                         e1000_down(adapter);
4306                                         e1000_up(adapter);
4307                                 } else
4308                                         e1000_reset(adapter);
4309                                 break;
4310                         }
4311                 }
4312                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4313                 break;
4314         default:
4315                 return -EOPNOTSUPP;
4316         }
4317         return E1000_SUCCESS;
4318 }
4319
4320 void
4321 e1000_pci_set_mwi(struct e1000_hw *hw)
4322 {
4323         struct e1000_adapter *adapter = hw->back;
4324         int ret_val = pci_set_mwi(adapter->pdev);
4325
4326         if (ret_val)
4327                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4328 }
4329
4330 void
4331 e1000_pci_clear_mwi(struct e1000_hw *hw)
4332 {
4333         struct e1000_adapter *adapter = hw->back;
4334
4335         pci_clear_mwi(adapter->pdev);
4336 }
4337
4338 void
4339 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4340 {
4341         struct e1000_adapter *adapter = hw->back;
4342
4343         pci_read_config_word(adapter->pdev, reg, value);
4344 }
4345
4346 void
4347 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4348 {
4349         struct e1000_adapter *adapter = hw->back;
4350
4351         pci_write_config_word(adapter->pdev, reg, *value);
4352 }
4353
4354 uint32_t
4355 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4356 {
4357         return inl(port);
4358 }
4359
4360 void
4361 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4362 {
4363         outl(value, port);
4364 }
4365
4366 static void
4367 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4368 {
4369         struct e1000_adapter *adapter = netdev_priv(netdev);
4370         uint32_t ctrl, rctl;
4371
4372         e1000_irq_disable(adapter);
4373         adapter->vlgrp = grp;
4374
4375         if (grp) {
4376                 /* enable VLAN tag insert/strip */
4377                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4378                 ctrl |= E1000_CTRL_VME;
4379                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4380
4381                 /* enable VLAN receive filtering */
4382                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4383                 rctl |= E1000_RCTL_VFE;
4384                 rctl &= ~E1000_RCTL_CFIEN;
4385                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4386                 e1000_update_mng_vlan(adapter);
4387         } else {
4388                 /* disable VLAN tag insert/strip */
4389                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4390                 ctrl &= ~E1000_CTRL_VME;
4391                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4392
4393                 /* disable VLAN filtering */
4394                 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4395                 rctl &= ~E1000_RCTL_VFE;
4396                 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4397                 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4398                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4399                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4400                 }
4401         }
4402
4403         e1000_irq_enable(adapter);
4404 }
4405
4406 static void
4407 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4408 {
4409         struct e1000_adapter *adapter = netdev_priv(netdev);
4410         uint32_t vfta, index;
4411
4412         if ((adapter->hw.mng_cookie.status &
4413              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4414             (vid == adapter->mng_vlan_id))
4415                 return;
4416         /* add VID to filter table */
4417         index = (vid >> 5) & 0x7F;
4418         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4419         vfta |= (1 << (vid & 0x1F));
4420         e1000_write_vfta(&adapter->hw, index, vfta);
4421 }
4422
4423 static void
4424 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4425 {
4426         struct e1000_adapter *adapter = netdev_priv(netdev);
4427         uint32_t vfta, index;
4428
4429         e1000_irq_disable(adapter);
4430
4431         if (adapter->vlgrp)
4432                 adapter->vlgrp->vlan_devices[vid] = NULL;
4433
4434         e1000_irq_enable(adapter);
4435
4436         if ((adapter->hw.mng_cookie.status &
4437              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4438             (vid == adapter->mng_vlan_id)) {
4439                 /* release control to f/w */
4440                 e1000_release_hw_control(adapter);
4441                 return;
4442         }
4443
4444         /* remove VID from filter table */
4445         index = (vid >> 5) & 0x7F;
4446         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4447         vfta &= ~(1 << (vid & 0x1F));
4448         e1000_write_vfta(&adapter->hw, index, vfta);
4449 }
4450
4451 static void
4452 e1000_restore_vlan(struct e1000_adapter *adapter)
4453 {
4454         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4455
4456         if (adapter->vlgrp) {
4457                 uint16_t vid;
4458                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4459                         if (!adapter->vlgrp->vlan_devices[vid])
4460                                 continue;
4461                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
4462                 }
4463         }
4464 }
4465
4466 int
4467 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4468 {
4469         adapter->hw.autoneg = 0;
4470
4471         /* Fiber NICs only allow 1000 gbps Full duplex */
4472         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4473                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4474                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4475                 return -EINVAL;
4476         }
4477
4478         switch (spddplx) {
4479         case SPEED_10 + DUPLEX_HALF:
4480                 adapter->hw.forced_speed_duplex = e1000_10_half;
4481                 break;
4482         case SPEED_10 + DUPLEX_FULL:
4483                 adapter->hw.forced_speed_duplex = e1000_10_full;
4484                 break;
4485         case SPEED_100 + DUPLEX_HALF:
4486                 adapter->hw.forced_speed_duplex = e1000_100_half;
4487                 break;
4488         case SPEED_100 + DUPLEX_FULL:
4489                 adapter->hw.forced_speed_duplex = e1000_100_full;
4490                 break;
4491         case SPEED_1000 + DUPLEX_FULL:
4492                 adapter->hw.autoneg = 1;
4493                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4494                 break;
4495         case SPEED_1000 + DUPLEX_HALF: /* not supported */
4496         default:
4497                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4498                 return -EINVAL;
4499         }
4500         return 0;
4501 }
4502
4503 #ifdef CONFIG_PM
4504 /* these functions save and restore 16 or 64 dwords (64-256 bytes) of config
4505  * space versus the 64 bytes that pci_[save|restore]_state handle
4506  */
4507 #define PCIE_CONFIG_SPACE_LEN 256
4508 #define PCI_CONFIG_SPACE_LEN 64
4509 static int
4510 e1000_pci_save_state(struct e1000_adapter *adapter)
4511 {
4512         struct pci_dev *dev = adapter->pdev;
4513         int size;
4514         int i;
4515         if (adapter->hw.mac_type >= e1000_82571)
4516                 size = PCIE_CONFIG_SPACE_LEN;
4517         else
4518                 size = PCI_CONFIG_SPACE_LEN;
4519
4520         WARN_ON(adapter->config_space != NULL);
4521
4522         adapter->config_space = kmalloc(size, GFP_KERNEL);
4523         if (!adapter->config_space) {
4524                 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4525                 return -ENOMEM;
4526         }
4527         for (i = 0; i < (size / 4); i++)
4528                 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4529         return 0;
4530 }
4531
4532 static void
4533 e1000_pci_restore_state(struct e1000_adapter *adapter)
4534 {
4535         struct pci_dev *dev = adapter->pdev;
4536         int size;
4537         int i;
4538         if (adapter->config_space == NULL)
4539                 return;
4540         if (adapter->hw.mac_type >= e1000_82571)
4541                 size = PCIE_CONFIG_SPACE_LEN;
4542         else
4543                 size = PCI_CONFIG_SPACE_LEN;
4544         for (i = 0; i < (size / 4); i++)
4545                 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4546         kfree(adapter->config_space);
4547         adapter->config_space = NULL;
4548         return;
4549 }
4550 #endif /* CONFIG_PM */
4551
4552 static int
4553 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4554 {
4555         struct net_device *netdev = pci_get_drvdata(pdev);
4556         struct e1000_adapter *adapter = netdev_priv(netdev);
4557         uint32_t ctrl, ctrl_ext, rctl, manc, status;
4558         uint32_t wufc = adapter->wol;
4559         int retval = 0;
4560
4561         netif_device_detach(netdev);
4562
4563         if (netif_running(netdev))
4564                 e1000_down(adapter);
4565
4566 #ifdef CONFIG_PM
4567         /* implement our own version of pci_save_state(pdev) because pci
4568          * express adapters have larger 256 byte config spaces */
4569         retval = e1000_pci_save_state(adapter);
4570         if (retval)
4571                 return retval;
4572 #endif
4573
4574         status = E1000_READ_REG(&adapter->hw, STATUS);
4575         if (status & E1000_STATUS_LU)
4576                 wufc &= ~E1000_WUFC_LNKC;
4577
4578         if (wufc) {
4579                 e1000_setup_rctl(adapter);
4580                 e1000_set_multi(netdev);
4581
4582                 /* turn on all-multi mode if wake on multicast is enabled */
4583                 if (adapter->wol & E1000_WUFC_MC) {
4584                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
4585                         rctl |= E1000_RCTL_MPE;
4586                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4587                 }
4588
4589                 if (adapter->hw.mac_type >= e1000_82540) {
4590                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4591                         /* advertise wake from D3Cold */
4592                         #define E1000_CTRL_ADVD3WUC 0x00100000
4593                         /* phy power management enable */
4594                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4595                         ctrl |= E1000_CTRL_ADVD3WUC |
4596                                 E1000_CTRL_EN_PHY_PWR_MGMT;
4597                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4598                 }
4599
4600                 if (adapter->hw.media_type == e1000_media_type_fiber ||
4601                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
4602                         /* keep the laser running in D3 */
4603                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4604                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4605                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4606                 }
4607
4608                 /* Allow time for pending master requests to run */
4609                 e1000_disable_pciex_master(&adapter->hw);
4610
4611                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4612                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4613                 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4614                 if (retval)
4615                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4616                 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4617                 if (retval)
4618                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4619         } else {
4620                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4621                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4622                 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4623                 if (retval)
4624                         DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4625                 retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
4626                 if (retval)
4627                         DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4628         }
4629
4630         if (adapter->hw.mac_type >= e1000_82540 &&
4631            adapter->hw.media_type == e1000_media_type_copper) {
4632                 manc = E1000_READ_REG(&adapter->hw, MANC);
4633                 if (manc & E1000_MANC_SMBUS_EN) {
4634                         manc |= E1000_MANC_ARP_EN;
4635                         E1000_WRITE_REG(&adapter->hw, MANC, manc);
4636                         retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4637                         if (retval)
4638                                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4639                         retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4640                         if (retval)
4641                                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4642                 }
4643         }
4644
4645         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4646          * would have already happened in close and is redundant. */
4647         e1000_release_hw_control(adapter);
4648
4649         pci_disable_device(pdev);
4650
4651         retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4652         if (retval)
4653                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4654
4655         return 0;
4656 }
4657
4658 #ifdef CONFIG_PM
4659 static int
4660 e1000_resume(struct pci_dev *pdev)
4661 {
4662         struct net_device *netdev = pci_get_drvdata(pdev);
4663         struct e1000_adapter *adapter = netdev_priv(netdev);
4664         int retval;
4665         uint32_t manc, ret_val;
4666
4667         retval = pci_set_power_state(pdev, PCI_D0);
4668         if (retval)
4669                 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4670         e1000_pci_restore_state(adapter);
4671         ret_val = pci_enable_device(pdev);
4672         pci_set_master(pdev);
4673
4674         retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4675         if (retval)
4676                 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4677         retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4678         if (retval)
4679                 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4680
4681         e1000_reset(adapter);
4682         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4683
4684         if (netif_running(netdev))
4685                 e1000_up(adapter);
4686
4687         netif_device_attach(netdev);
4688
4689         if (adapter->hw.mac_type >= e1000_82540 &&
4690            adapter->hw.media_type == e1000_media_type_copper) {
4691                 manc = E1000_READ_REG(&adapter->hw, MANC);
4692                 manc &= ~(E1000_MANC_ARP_EN);
4693                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4694         }
4695
4696         /* If the controller is 82573 and f/w is AMT, do not set
4697          * DRV_LOAD until the interface is up.  For all other cases,
4698          * let the f/w know that the h/w is now under the control
4699          * of the driver. */
4700         if (adapter->hw.mac_type != e1000_82573 ||
4701             !e1000_check_mng_mode(&adapter->hw))
4702                 e1000_get_hw_control(adapter);
4703
4704         return 0;
4705 }
4706 #endif
4707 #ifdef CONFIG_NET_POLL_CONTROLLER
4708 /*
4709  * Polling 'interrupt' - used by things like netconsole to send skbs
4710  * without having to re-enable interrupts. It's not called while
4711  * the interrupt routine is executing.
4712  */
4713 static void
4714 e1000_netpoll(struct net_device *netdev)
4715 {
4716         struct e1000_adapter *adapter = netdev_priv(netdev);
4717         disable_irq(adapter->pdev->irq);
4718         e1000_intr(adapter->pdev->irq, netdev, NULL);
4719         e1000_clean_tx_irq(adapter, adapter->tx_ring);
4720 #ifndef CONFIG_E1000_NAPI
4721         adapter->clean_rx(adapter, adapter->rx_ring);
4722 #endif
4723         enable_irq(adapter->pdev->irq);
4724 }
4725 #endif
4726
4727 /* e1000_main.c */