drivers/net/e1000/e1000_main.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2006 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include "e1000.h"
  30 #include <net/ip6_checksum.h>
  31
  32 char e1000_driver_name[] = "e1000";
  33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
  34 #ifndef CONFIG_E1000_NAPI
  35 #define DRIVERNAPI
  36 #else
  37 #define DRIVERNAPI "-NAPI"
  38 #endif
  39 #define DRV_VERSION "7.3.20-k2"DRIVERNAPI
  40 const char e1000_driver_version[] = DRV_VERSION;
  41 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
  42
  43 /* e1000_pci_tbl - PCI Device ID Table
  44  *
  45  * Last entry must be all 0s
  46  *
  47  * Macro expands to...
  48  *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  49  */
  50 #ifdef CONFIG_E1000E_ENABLED
  51   #define PCIE(x)
  52 #else
  53   #define PCIE(x) x,
  54 #endif
  55
  56 static struct pci_device_id e1000_pci_tbl[] = {
  57         INTEL_E1000_ETHERNET_DEVICE(0x1000),
  58         INTEL_E1000_ETHERNET_DEVICE(0x1001),
  59         INTEL_E1000_ETHERNET_DEVICE(0x1004),
  60         INTEL_E1000_ETHERNET_DEVICE(0x1008),
  61         INTEL_E1000_ETHERNET_DEVICE(0x1009),
  62         INTEL_E1000_ETHERNET_DEVICE(0x100C),
  63         INTEL_E1000_ETHERNET_DEVICE(0x100D),
  64         INTEL_E1000_ETHERNET_DEVICE(0x100E),
  65         INTEL_E1000_ETHERNET_DEVICE(0x100F),
  66         INTEL_E1000_ETHERNET_DEVICE(0x1010),
  67         INTEL_E1000_ETHERNET_DEVICE(0x1011),
  68         INTEL_E1000_ETHERNET_DEVICE(0x1012),
  69         INTEL_E1000_ETHERNET_DEVICE(0x1013),
  70         INTEL_E1000_ETHERNET_DEVICE(0x1014),
  71         INTEL_E1000_ETHERNET_DEVICE(0x1015),
  72         INTEL_E1000_ETHERNET_DEVICE(0x1016),
  73         INTEL_E1000_ETHERNET_DEVICE(0x1017),
  74         INTEL_E1000_ETHERNET_DEVICE(0x1018),
  75         INTEL_E1000_ETHERNET_DEVICE(0x1019),
  76         INTEL_E1000_ETHERNET_DEVICE(0x101A),
  77         INTEL_E1000_ETHERNET_DEVICE(0x101D),
  78         INTEL_E1000_ETHERNET_DEVICE(0x101E),
  79         INTEL_E1000_ETHERNET_DEVICE(0x1026),
  80         INTEL_E1000_ETHERNET_DEVICE(0x1027),
  81         INTEL_E1000_ETHERNET_DEVICE(0x1028),
  82 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1049))
  83 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104A))
  84 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104B))
  85 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104C))
  86 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x104D))
  87 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x105E))
  88 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x105F))
  89 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1060))
  90         INTEL_E1000_ETHERNET_DEVICE(0x1075),
  91         INTEL_E1000_ETHERNET_DEVICE(0x1076),
  92         INTEL_E1000_ETHERNET_DEVICE(0x1077),
  93         INTEL_E1000_ETHERNET_DEVICE(0x1078),
  94         INTEL_E1000_ETHERNET_DEVICE(0x1079),
  95         INTEL_E1000_ETHERNET_DEVICE(0x107A),
  96         INTEL_E1000_ETHERNET_DEVICE(0x107B),
  97         INTEL_E1000_ETHERNET_DEVICE(0x107C),
  98 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107D))
  99 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107E))
 100 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x107F))
 101         INTEL_E1000_ETHERNET_DEVICE(0x108A),
 102 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x108B))
 103 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x108C))
 104 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1096))
 105 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x1098))
 106         INTEL_E1000_ETHERNET_DEVICE(0x1099),
 107 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x109A))
 108 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10A4))
 109 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10A5))
 110         INTEL_E1000_ETHERNET_DEVICE(0x10B5),
 111 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10B9))
 112 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BA))
 113 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BB))
 114 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10BC))
 115 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10C4))
 116 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10C5))
 117 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10D5))
 118 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10D9))
 119 PCIE(   INTEL_E1000_ETHERNET_DEVICE(0x10DA))
 120         /* required last entry */
 121         {0,}
 122 };
 123
 124 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
 125
 126 int e1000_up(struct e1000_adapter *adapter);
 127 void e1000_down(struct e1000_adapter *adapter);
 128 void e1000_reinit_locked(struct e1000_adapter *adapter);
 129 void e1000_reset(struct e1000_adapter *adapter);
 130 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
 131 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
 132 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
 133 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
 134 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
 135 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
 136                              struct e1000_tx_ring *txdr);
 137 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
 138                              struct e1000_rx_ring *rxdr);
 139 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
 140                              struct e1000_tx_ring *tx_ring);
 141 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
 142                              struct e1000_rx_ring *rx_ring);
 143 void e1000_update_stats(struct e1000_adapter *adapter);
 144
 145 static int e1000_init_module(void);
 146 static void e1000_exit_module(void);
 147 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 148 static void __devexit e1000_remove(struct pci_dev *pdev);
 149 static int e1000_alloc_queues(struct e1000_adapter *adapter);
 150 static int e1000_sw_init(struct e1000_adapter *adapter);
 151 static int e1000_open(struct net_device *netdev);
 152 static int e1000_close(struct net_device *netdev);
 153 static void e1000_configure_tx(struct e1000_adapter *adapter);
 154 static void e1000_configure_rx(struct e1000_adapter *adapter);
 155 static void e1000_setup_rctl(struct e1000_adapter *adapter);
 156 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
 157 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
 158 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
 159                                 struct e1000_tx_ring *tx_ring);
 160 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
 161                                 struct e1000_rx_ring *rx_ring);
 162 static void e1000_set_rx_mode(struct net_device *netdev);
 163 static void e1000_update_phy_info(unsigned long data);
 164 static void e1000_watchdog(unsigned long data);
 165 static void e1000_82547_tx_fifo_stall(unsigned long data);
 166 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
 167 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
 168 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
 169 static int e1000_set_mac(struct net_device *netdev, void *p);
 170 static irqreturn_t e1000_intr(int irq, void *data);
 171 static irqreturn_t e1000_intr_msi(int irq, void *data);
 172 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
 173                                struct e1000_tx_ring *tx_ring);
 174 #ifdef CONFIG_E1000_NAPI
 175 static int e1000_clean(struct napi_struct *napi, int budget);
 176 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 177                                struct e1000_rx_ring *rx_ring,
 178                                int *work_done, int work_to_do);
 179 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 180                                   struct e1000_rx_ring *rx_ring,
 181                                   int *work_done, int work_to_do);
 182 #else
 183 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 184                                struct e1000_rx_ring *rx_ring);
 185 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 186                                   struct e1000_rx_ring *rx_ring);
 187 #endif
 188 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 189                                    struct e1000_rx_ring *rx_ring,
 190                                    int cleaned_count);
 191 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 192                                       struct e1000_rx_ring *rx_ring,
 193                                       int cleaned_count);
 194 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
 195 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
 196                            int cmd);
 197 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 198 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 199 static void e1000_tx_timeout(struct net_device *dev);
 200 static void e1000_reset_task(struct work_struct *work);
 201 static void e1000_smartspeed(struct e1000_adapter *adapter);
 202 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 203                                        struct sk_buff *skb);
 204
 205 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
 206 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
 207 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
 208 static void e1000_restore_vlan(struct e1000_adapter *adapter);
 209
 210 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
 211 #ifdef CONFIG_PM
 212 static int e1000_resume(struct pci_dev *pdev);
 213 #endif
 214 static void e1000_shutdown(struct pci_dev *pdev);
 215
 216 #ifdef CONFIG_NET_POLL_CONTROLLER
 217 /* for netdump / net console */
 218 static void e1000_netpoll (struct net_device *netdev);
 219 #endif
 220
 221 #define COPYBREAK_DEFAULT 256
 222 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
 223 module_param(copybreak, uint, 0644);
 224 MODULE_PARM_DESC(copybreak,
 225         "Maximum size of packet that is copied to a new buffer on receive");
 226
 227 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
 228                      pci_channel_state_t state);
 229 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
 230 static void e1000_io_resume(struct pci_dev *pdev);
 231
 232 static struct pci_error_handlers e1000_err_handler = {
 233         .error_detected = e1000_io_error_detected,
 234         .slot_reset = e1000_io_slot_reset,
 235         .resume = e1000_io_resume,
 236 };
 237
 238 static struct pci_driver e1000_driver = {
 239         .name     = e1000_driver_name,
 240         .id_table = e1000_pci_tbl,
 241         .probe    = e1000_probe,
 242         .remove   = __devexit_p(e1000_remove),
 243 #ifdef CONFIG_PM
 244         /* Power Managment Hooks */
 245         .suspend  = e1000_suspend,
 246         .resume   = e1000_resume,
 247 #endif
 248         .shutdown = e1000_shutdown,
 249         .err_handler = &e1000_err_handler
 250 };
 251
 252 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 253 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
 254 MODULE_LICENSE("GPL");
 255 MODULE_VERSION(DRV_VERSION);
 256
 257 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 258 module_param(debug, int, 0);
 259 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 260
 261 /**
 262  * e1000_init_module - Driver Registration Routine
 263  *
 264  * e1000_init_module is the first routine called when the driver is
 265  * loaded. All it does is register with the PCI subsystem.
 266  **/
 267
 268 static int __init
 269 e1000_init_module(void)
 270 {
 271         int ret;
 272         printk(KERN_INFO "%s - version %s\n",
 273                e1000_driver_string, e1000_driver_version);
 274
 275         printk(KERN_INFO "%s\n", e1000_copyright);
 276
 277         ret = pci_register_driver(&e1000_driver);
 278         if (copybreak != COPYBREAK_DEFAULT) {
 279                 if (copybreak == 0)
 280                         printk(KERN_INFO "e1000: copybreak disabled\n");
 281                 else
 282                         printk(KERN_INFO "e1000: copybreak enabled for "
 283                                "packets <= %u bytes\n", copybreak);
 284         }
 285         return ret;
 286 }
 287
 288 module_init(e1000_init_module);
 289
 290 /**
 291  * e1000_exit_module - Driver Exit Cleanup Routine
 292  *
 293  * e1000_exit_module is called just before the driver is removed
 294  * from memory.
 295  **/
 296
 297 static void __exit
 298 e1000_exit_module(void)
 299 {
 300         pci_unregister_driver(&e1000_driver);
 301 }
 302
 303 module_exit(e1000_exit_module);
 304
 305 static int e1000_request_irq(struct e1000_adapter *adapter)
 306 {
 307         struct net_device *netdev = adapter->netdev;
 308         irq_handler_t handler = e1000_intr;
 309         int irq_flags = IRQF_SHARED;
 310         int err;
 311
 312         if (adapter->hw.mac_type >= e1000_82571) {
 313                 adapter->have_msi = !pci_enable_msi(adapter->pdev);
 314                 if (adapter->have_msi) {
 315                         handler = e1000_intr_msi;
 316                         irq_flags = 0;
 317                 }
 318         }
 319
 320         err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
 321                           netdev);
 322         if (err) {
 323                 if (adapter->have_msi)
 324                         pci_disable_msi(adapter->pdev);
 325                 DPRINTK(PROBE, ERR,
 326                         "Unable to allocate interrupt Error: %d\n", err);
 327         }
 328
 329         return err;
 330 }
 331
 332 static void e1000_free_irq(struct e1000_adapter *adapter)
 333 {
 334         struct net_device *netdev = adapter->netdev;
 335
 336         free_irq(adapter->pdev->irq, netdev);
 337
 338         if (adapter->have_msi)
 339                 pci_disable_msi(adapter->pdev);
 340 }
 341
 342 /**
 343  * e1000_irq_disable - Mask off interrupt generation on the NIC
 344  * @adapter: board private structure
 345  **/
 346
 347 static void
 348 e1000_irq_disable(struct e1000_adapter *adapter)
 349 {
 350         E1000_WRITE_REG(&adapter->hw, IMC, ~0);
 351         E1000_WRITE_FLUSH(&adapter->hw);
 352         synchronize_irq(adapter->pdev->irq);
 353 }
 354
 355 /**
 356  * e1000_irq_enable - Enable default interrupt generation settings
 357  * @adapter: board private structure
 358  **/
 359
 360 static void
 361 e1000_irq_enable(struct e1000_adapter *adapter)
 362 {
 363         E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
 364         E1000_WRITE_FLUSH(&adapter->hw);
 365 }
 366
 367 static void
 368 e1000_update_mng_vlan(struct e1000_adapter *adapter)
 369 {
 370         struct net_device *netdev = adapter->netdev;
 371         uint16_t vid = adapter->hw.mng_cookie.vlan_id;
 372         uint16_t old_vid = adapter->mng_vlan_id;
 373         if (adapter->vlgrp) {
 374                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 375                         if (adapter->hw.mng_cookie.status &
 376                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
 377                                 e1000_vlan_rx_add_vid(netdev, vid);
 378                                 adapter->mng_vlan_id = vid;
 379                         } else
 380                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 381
 382                         if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
 383                                         (vid != old_vid) &&
 384                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 385                                 e1000_vlan_rx_kill_vid(netdev, old_vid);
 386                 } else
 387                         adapter->mng_vlan_id = vid;
 388         }
 389 }
 390
 391 /**
 392  * e1000_release_hw_control - release control of the h/w to f/w
 393  * @adapter: address of board private structure
 394  *
 395  * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 396  * For ASF and Pass Through versions of f/w this means that the
 397  * driver is no longer loaded. For AMT version (only with 82573) i
 398  * of the f/w this means that the network i/f is closed.
 399  *
 400  **/
 401
 402 static void
 403 e1000_release_hw_control(struct e1000_adapter *adapter)
 404 {
 405         uint32_t ctrl_ext;
 406         uint32_t swsm;
 407
 408         /* Let firmware taken over control of h/w */
 409         switch (adapter->hw.mac_type) {
 410         case e1000_82573:
 411                 swsm = E1000_READ_REG(&adapter->hw, SWSM);
 412                 E1000_WRITE_REG(&adapter->hw, SWSM,
 413                                 swsm & ~E1000_SWSM_DRV_LOAD);
 414                 break;
 415         case e1000_82571:
 416         case e1000_82572:
 417         case e1000_80003es2lan:
 418         case e1000_ich8lan:
 419                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 420                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 421                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 422                 break;
 423         default:
 424                 break;
 425         }
 426 }
 427
 428 /**
 429  * e1000_get_hw_control - get control of the h/w from f/w
 430  * @adapter: address of board private structure
 431  *
 432  * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 433  * For ASF and Pass Through versions of f/w this means that
 434  * the driver is loaded. For AMT version (only with 82573)
 435  * of the f/w this means that the network i/f is open.
 436  *
 437  **/
 438
 439 static void
 440 e1000_get_hw_control(struct e1000_adapter *adapter)
 441 {
 442         uint32_t ctrl_ext;
 443         uint32_t swsm;
 444
 445         /* Let firmware know the driver has taken over */
 446         switch (adapter->hw.mac_type) {
 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         case e1000_82571:
 453         case e1000_82572:
 454         case e1000_80003es2lan:
 455         case e1000_ich8lan:
 456                 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
 457                 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
 458                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 459                 break;
 460         default:
 461                 break;
 462         }
 463 }
 464
 465 static void
 466 e1000_init_manageability(struct e1000_adapter *adapter)
 467 {
 468         if (adapter->en_mng_pt) {
 469                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 470
 471                 /* disable hardware interception of ARP */
 472                 manc &= ~(E1000_MANC_ARP_EN);
 473
 474                 /* enable receiving management packets to the host */
 475                 /* this will probably generate destination unreachable messages
 476                  * from the host OS, but the packets will be handled on SMBUS */
 477                 if (adapter->hw.has_manc2h) {
 478                         uint32_t manc2h = E1000_READ_REG(&adapter->hw, MANC2H);
 479
 480                         manc |= E1000_MANC_EN_MNG2HOST;
 481 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 482 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 483                         manc2h |= E1000_MNG2HOST_PORT_623;
 484                         manc2h |= E1000_MNG2HOST_PORT_664;
 485                         E1000_WRITE_REG(&adapter->hw, MANC2H, manc2h);
 486                 }
 487
 488                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 489         }
 490 }
 491
 492 static void
 493 e1000_release_manageability(struct e1000_adapter *adapter)
 494 {
 495         if (adapter->en_mng_pt) {
 496                 uint32_t manc = E1000_READ_REG(&adapter->hw, MANC);
 497
 498                 /* re-enable hardware interception of ARP */
 499                 manc |= E1000_MANC_ARP_EN;
 500
 501                 if (adapter->hw.has_manc2h)
 502                         manc &= ~E1000_MANC_EN_MNG2HOST;
 503
 504                 /* don't explicitly have to mess with MANC2H since
 505                  * MANC has an enable disable that gates MANC2H */
 506
 507                 E1000_WRITE_REG(&adapter->hw, MANC, manc);
 508         }
 509 }
 510
 511 /**
 512  * e1000_configure - configure the hardware for RX and TX
 513  * @adapter = private board structure
 514  **/
 515 static void e1000_configure(struct e1000_adapter *adapter)
 516 {
 517         struct net_device *netdev = adapter->netdev;
 518         int i;
 519
 520         e1000_set_rx_mode(netdev);
 521
 522         e1000_restore_vlan(adapter);
 523         e1000_init_manageability(adapter);
 524
 525         e1000_configure_tx(adapter);
 526         e1000_setup_rctl(adapter);
 527         e1000_configure_rx(adapter);
 528         /* call E1000_DESC_UNUSED which always leaves
 529          * at least 1 descriptor unused to make sure
 530          * next_to_use != next_to_clean */
 531         for (i = 0; i < adapter->num_rx_queues; i++) {
 532                 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
 533                 adapter->alloc_rx_buf(adapter, ring,
 534                                       E1000_DESC_UNUSED(ring));
 535         }
 536
 537         adapter->tx_queue_len = netdev->tx_queue_len;
 538 }
 539
 540 int e1000_up(struct e1000_adapter *adapter)
 541 {
 542         /* hardware has been reset, we need to reload some things */
 543         e1000_configure(adapter);
 544
 545         clear_bit(__E1000_DOWN, &adapter->flags);
 546
 547 #ifdef CONFIG_E1000_NAPI
 548         napi_enable(&adapter->napi);
 549 #endif
 550         e1000_irq_enable(adapter);
 551
 552         /* fire a link change interrupt to start the watchdog */
 553         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
 554         return 0;
 555 }
 556
 557 /**
 558  * e1000_power_up_phy - restore link in case the phy was powered down
 559  * @adapter: address of board private structure
 560  *
 561  * The phy may be powered down to save power and turn off link when the
 562  * driver is unloaded and wake on lan is not enabled (among others)
 563  * *** this routine MUST be followed by a call to e1000_reset ***
 564  *
 565  **/
 566
 567 void e1000_power_up_phy(struct e1000_adapter *adapter)
 568 {
 569         uint16_t mii_reg = 0;
 570
 571         /* Just clear the power down bit to wake the phy back up */
 572         if (adapter->hw.media_type == e1000_media_type_copper) {
 573                 /* according to the manual, the phy will retain its
 574                  * settings across a power-down/up cycle */
 575                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 576                 mii_reg &= ~MII_CR_POWER_DOWN;
 577                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 578         }
 579 }
 580
 581 static void e1000_power_down_phy(struct e1000_adapter *adapter)
 582 {
 583         /* Power down the PHY so no link is implied when interface is down *
 584          * The PHY cannot be powered down if any of the following is true *
 585          * (a) WoL is enabled
 586          * (b) AMT is active
 587          * (c) SoL/IDER session is active */
 588         if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 589            adapter->hw.media_type == e1000_media_type_copper) {
 590                 uint16_t mii_reg = 0;
 591
 592                 switch (adapter->hw.mac_type) {
 593                 case e1000_82540:
 594                 case e1000_82545:
 595                 case e1000_82545_rev_3:
 596                 case e1000_82546:
 597                 case e1000_82546_rev_3:
 598                 case e1000_82541:
 599                 case e1000_82541_rev_2:
 600                 case e1000_82547:
 601                 case e1000_82547_rev_2:
 602                         if (E1000_READ_REG(&adapter->hw, MANC) &
 603                             E1000_MANC_SMBUS_EN)
 604                                 goto out;
 605                         break;
 606                 case e1000_82571:
 607                 case e1000_82572:
 608                 case e1000_82573:
 609                 case e1000_80003es2lan:
 610                 case e1000_ich8lan:
 611                         if (e1000_check_mng_mode(&adapter->hw) ||
 612                             e1000_check_phy_reset_block(&adapter->hw))
 613                                 goto out;
 614                         break;
 615                 default:
 616                         goto out;
 617                 }
 618                 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 619                 mii_reg |= MII_CR_POWER_DOWN;
 620                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
 621                 mdelay(1);
 622         }
 623 out:
 624         return;
 625 }
 626
 627 void
 628 e1000_down(struct e1000_adapter *adapter)
 629 {
 630         struct net_device *netdev = adapter->netdev;
 631
 632         /* signal that we're down so the interrupt handler does not
 633          * reschedule our watchdog timer */
 634         set_bit(__E1000_DOWN, &adapter->flags);
 635
 636 #ifdef CONFIG_E1000_NAPI
 637         napi_disable(&adapter->napi);
 638 #endif
 639         e1000_irq_disable(adapter);
 640
 641         del_timer_sync(&adapter->tx_fifo_stall_timer);
 642         del_timer_sync(&adapter->watchdog_timer);
 643         del_timer_sync(&adapter->phy_info_timer);
 644
 645         netdev->tx_queue_len = adapter->tx_queue_len;
 646         adapter->link_speed = 0;
 647         adapter->link_duplex = 0;
 648         netif_carrier_off(netdev);
 649         netif_stop_queue(netdev);
 650
 651         e1000_reset(adapter);
 652         e1000_clean_all_tx_rings(adapter);
 653         e1000_clean_all_rx_rings(adapter);
 654 }
 655
 656 void
 657 e1000_reinit_locked(struct e1000_adapter *adapter)
 658 {
 659         WARN_ON(in_interrupt());
 660         while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
 661                 msleep(1);
 662         e1000_down(adapter);
 663         e1000_up(adapter);
 664         clear_bit(__E1000_RESETTING, &adapter->flags);
 665 }
 666
 667 void
 668 e1000_reset(struct e1000_adapter *adapter)
 669 {
 670         uint32_t pba = 0, tx_space, min_tx_space, min_rx_space;
 671         uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
 672         bool legacy_pba_adjust = false;
 673
 674         /* Repartition Pba for greater than 9k mtu
 675          * To take effect CTRL.RST is required.
 676          */
 677
 678         switch (adapter->hw.mac_type) {
 679         case e1000_82542_rev2_0:
 680         case e1000_82542_rev2_1:
 681         case e1000_82543:
 682         case e1000_82544:
 683         case e1000_82540:
 684         case e1000_82541:
 685         case e1000_82541_rev_2:
 686                 legacy_pba_adjust = true;
 687                 pba = E1000_PBA_48K;
 688                 break;
 689         case e1000_82545:
 690         case e1000_82545_rev_3:
 691         case e1000_82546:
 692         case e1000_82546_rev_3:
 693                 pba = E1000_PBA_48K;
 694                 break;
 695         case e1000_82547:
 696         case e1000_82547_rev_2:
 697                 legacy_pba_adjust = true;
 698                 pba = E1000_PBA_30K;
 699                 break;
 700         case e1000_82571:
 701         case e1000_82572:
 702         case e1000_80003es2lan:
 703                 pba = E1000_PBA_38K;
 704                 break;
 705         case e1000_82573:
 706                 pba = E1000_PBA_20K;
 707                 break;
 708         case e1000_ich8lan:
 709                 pba = E1000_PBA_8K;
 710         case e1000_undefined:
 711         case e1000_num_macs:
 712                 break;
 713         }
 714
 715         if (legacy_pba_adjust) {
 716                 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
 717                         pba -= 8; /* allocate more FIFO for Tx */
 718
 719                 if (adapter->hw.mac_type == e1000_82547) {
 720                         adapter->tx_fifo_head = 0;
 721                         adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
 722                         adapter->tx_fifo_size =
 723                                 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
 724                         atomic_set(&adapter->tx_fifo_stall, 0);
 725                 }
 726         } else if (adapter->hw.max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
 727                 /* adjust PBA for jumbo frames */
 728                 E1000_WRITE_REG(&adapter->hw, PBA, pba);
 729
 730                 /* To maintain wire speed transmits, the Tx FIFO should be
 731                  * large enough to accomodate two full transmit packets,
 732                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 733                  * the Rx FIFO should be large enough to accomodate at least
 734                  * one full receive packet and is similarly rounded up and
 735                  * expressed in KB. */
 736                 pba = E1000_READ_REG(&adapter->hw, PBA);
 737                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 738                 tx_space = pba >> 16;
 739                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 740                 pba &= 0xffff;
 741                 /* don't include ethernet FCS because hardware appends/strips */
 742                 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
 743                                VLAN_TAG_SIZE;
 744                 min_tx_space = min_rx_space;
 745                 min_tx_space *= 2;
 746                 min_tx_space = ALIGN(min_tx_space, 1024);
 747                 min_tx_space >>= 10;
 748                 min_rx_space = ALIGN(min_rx_space, 1024);
 749                 min_rx_space >>= 10;
 750
 751                 /* If current Tx allocation is less than the min Tx FIFO size,
 752                  * and the min Tx FIFO size is less than the current Rx FIFO
 753                  * allocation, take space away from current Rx allocation */
 754                 if (tx_space < min_tx_space &&
 755                     ((min_tx_space - tx_space) < pba)) {
 756                         pba = pba - (min_tx_space - tx_space);
 757
 758                         /* PCI/PCIx hardware has PBA alignment constraints */
 759                         switch (adapter->hw.mac_type) {
 760                         case e1000_82545 ... e1000_82546_rev_3:
 761                                 pba &= ~(E1000_PBA_8K - 1);
 762                                 break;
 763                         default:
 764                                 break;
 765                         }
 766
 767                         /* if short on rx space, rx wins and must trump tx
 768                          * adjustment or use Early Receive if available */
 769                         if (pba < min_rx_space) {
 770                                 switch (adapter->hw.mac_type) {
 771                                 case e1000_82573:
 772                                         /* ERT enabled in e1000_configure_rx */
 773                                         break;
 774                                 default:
 775                                         pba = min_rx_space;
 776                                         break;
 777                                 }
 778                         }
 779                 }
 780         }
 781
 782         E1000_WRITE_REG(&adapter->hw, PBA, pba);
 783
 784         /* flow control settings */
 785         /* Set the FC high water mark to 90% of the FIFO size.
 786          * Required to clear last 3 LSB */
 787         fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
 788         /* We can't use 90% on small FIFOs because the remainder
 789          * would be less than 1 full frame.  In this case, we size
 790          * it to allow at least a full frame above the high water
 791          *  mark. */
 792         if (pba < E1000_PBA_16K)
 793                 fc_high_water_mark = (pba * 1024) - 1600;
 794
 795         adapter->hw.fc_high_water = fc_high_water_mark;
 796         adapter->hw.fc_low_water = fc_high_water_mark - 8;
 797         if (adapter->hw.mac_type == e1000_80003es2lan)
 798                 adapter->hw.fc_pause_time = 0xFFFF;
 799         else
 800                 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 801         adapter->hw.fc_send_xon = 1;
 802         adapter->hw.fc = adapter->hw.original_fc;
 803
 804         /* Allow time for pending master requests to run */
 805         e1000_reset_hw(&adapter->hw);
 806         if (adapter->hw.mac_type >= e1000_82544)
 807                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
 808
 809         if (e1000_init_hw(&adapter->hw))
 810                 DPRINTK(PROBE, ERR, "Hardware Error\n");
 811         e1000_update_mng_vlan(adapter);
 812
 813         /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
 814         if (adapter->hw.mac_type >= e1000_82544 &&
 815             adapter->hw.mac_type <= e1000_82547_rev_2 &&
 816             adapter->hw.autoneg == 1 &&
 817             adapter->hw.autoneg_advertised == ADVERTISE_1000_FULL) {
 818                 uint32_t ctrl = E1000_READ_REG(&adapter->hw, CTRL);
 819                 /* clear phy power management bit if we are in gig only mode,
 820                  * which if enabled will attempt negotiation to 100Mb, which
 821                  * can cause a loss of link at power off or driver unload */
 822                 ctrl &= ~E1000_CTRL_SWDPIN3;
 823                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
 824         }
 825
 826         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 827         E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
 828
 829         e1000_reset_adaptive(&adapter->hw);
 830         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
 831
 832         if (!adapter->smart_power_down &&
 833             (adapter->hw.mac_type == e1000_82571 ||
 834              adapter->hw.mac_type == e1000_82572)) {
 835                 uint16_t phy_data = 0;
 836                 /* speed up time to link by disabling smart power down, ignore
 837                  * the return value of this function because there is nothing
 838                  * different we would do if it failed */
 839                 e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 840                                    &phy_data);
 841                 phy_data &= ~IGP02E1000_PM_SPD;
 842                 e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
 843                                     phy_data);
 844         }
 845
 846         e1000_release_manageability(adapter);
 847 }
 848
 849 /**
 850  *  Dump the eeprom for users having checksum issues
 851  **/
 852 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
 853 {
 854         struct net_device *netdev = adapter->netdev;
 855         struct ethtool_eeprom eeprom;
 856         const struct ethtool_ops *ops = netdev->ethtool_ops;
 857         u8 *data;
 858         int i;
 859         u16 csum_old, csum_new = 0;
 860
 861         eeprom.len = ops->get_eeprom_len(netdev);
 862         eeprom.offset = 0;
 863
 864         data = kmalloc(eeprom.len, GFP_KERNEL);
 865         if (!data) {
 866                 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
 867                        " data\n");
 868                 return;
 869         }
 870
 871         ops->get_eeprom(netdev, &eeprom, data);
 872
 873         csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
 874                    (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
 875         for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
 876                 csum_new += data[i] + (data[i + 1] << 8);
 877         csum_new = EEPROM_SUM - csum_new;
 878
 879         printk(KERN_ERR "/*********************/\n");
 880         printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
 881         printk(KERN_ERR "Calculated              : 0x%04x\n", csum_new);
 882
 883         printk(KERN_ERR "Offset    Values\n");
 884         printk(KERN_ERR "========  ======\n");
 885         print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
 886
 887         printk(KERN_ERR "Include this output when contacting your support "
 888                "provider.\n");
 889         printk(KERN_ERR "This is not a software error! Something bad "
 890                "happened to your hardware or\n");
 891         printk(KERN_ERR "EEPROM image. Ignoring this "
 892                "problem could result in further problems,\n");
 893         printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
 894         printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
 895                "which is invalid\n");
 896         printk(KERN_ERR "and requires you to set the proper MAC "
 897                "address manually before continuing\n");
 898         printk(KERN_ERR "to enable this network device.\n");
 899         printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
 900                "to your hardware vendor\n");
 901         printk(KERN_ERR "or Intel Customer Support: linux-nics@intel.com\n");
 902         printk(KERN_ERR "/*********************/\n");
 903
 904         kfree(data);
 905 }
 906
 907 /**
 908  * e1000_probe - Device Initialization Routine
 909  * @pdev: PCI device information struct
 910  * @ent: entry in e1000_pci_tbl
 911  *
 912  * Returns 0 on success, negative on failure
 913  *
 914  * e1000_probe initializes an adapter identified by a pci_dev structure.
 915  * The OS initialization, configuring of the adapter private structure,
 916  * and a hardware reset occur.
 917  **/
 918
 919 static int __devinit
 920 e1000_probe(struct pci_dev *pdev,
 921             const struct pci_device_id *ent)
 922 {
 923         struct net_device *netdev;
 924         struct e1000_adapter *adapter;
 925
 926         static int cards_found = 0;
 927         static int global_quad_port_a = 0; /* global ksp3 port a indication */
 928         int i, err, pci_using_dac;
 929         uint16_t eeprom_data = 0;
 930         uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
 931         DECLARE_MAC_BUF(mac);
 932
 933         if ((err = pci_enable_device(pdev)))
 934                 return err;
 935
 936         if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK)) &&
 937             !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
 938                 pci_using_dac = 1;
 939         } else {
 940                 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
 941                     (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))) {
 942                         E1000_ERR("No usable DMA configuration, aborting\n");
 943                         goto err_dma;
 944                 }
 945                 pci_using_dac = 0;
 946         }
 947
 948         if ((err = pci_request_regions(pdev, e1000_driver_name)))
 949                 goto err_pci_reg;
 950
 951         pci_set_master(pdev);
 952
 953         err = -ENOMEM;
 954         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
 955         if (!netdev)
 956                 goto err_alloc_etherdev;
 957
 958         SET_NETDEV_DEV(netdev, &pdev->dev);
 959
 960         pci_set_drvdata(pdev, netdev);
 961         adapter = netdev_priv(netdev);
 962         adapter->netdev = netdev;
 963         adapter->pdev = pdev;
 964         adapter->hw.back = adapter;
 965         adapter->msg_enable = (1 << debug) - 1;
 966
 967         err = -EIO;
 968         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, BAR_0),
 969                                       pci_resource_len(pdev, BAR_0));
 970         if (!adapter->hw.hw_addr)
 971                 goto err_ioremap;
 972
 973         for (i = BAR_1; i <= BAR_5; i++) {
 974                 if (pci_resource_len(pdev, i) == 0)
 975                         continue;
 976                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
 977                         adapter->hw.io_base = pci_resource_start(pdev, i);
 978                         break;
 979                 }
 980         }
 981
 982         netdev->open = &e1000_open;
 983         netdev->stop = &e1000_close;
 984         netdev->hard_start_xmit = &e1000_xmit_frame;
 985         netdev->get_stats = &e1000_get_stats;
 986         netdev->set_rx_mode = &e1000_set_rx_mode;
 987         netdev->set_mac_address = &e1000_set_mac;
 988         netdev->change_mtu = &e1000_change_mtu;
 989         netdev->do_ioctl = &e1000_ioctl;
 990         e1000_set_ethtool_ops(netdev);
 991         netdev->tx_timeout = &e1000_tx_timeout;
 992         netdev->watchdog_timeo = 5 * HZ;
 993 #ifdef CONFIG_E1000_NAPI
 994         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
 995 #endif
 996         netdev->vlan_rx_register = e1000_vlan_rx_register;
 997         netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
 998         netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
 999 #ifdef CONFIG_NET_POLL_CONTROLLER
1000         netdev->poll_controller = e1000_netpoll;
1001 #endif
1002         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1003
1004         adapter->bd_number = cards_found;
1005
1006         /* setup the private structure */
1007
1008         if ((err = e1000_sw_init(adapter)))
1009                 goto err_sw_init;
1010
1011         err = -EIO;
1012         /* Flash BAR mapping must happen after e1000_sw_init
1013          * because it depends on mac_type */
1014         if ((adapter->hw.mac_type == e1000_ich8lan) &&
1015            (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1016                 adapter->hw.flash_address =
1017                         ioremap(pci_resource_start(pdev, 1),
1018                                 pci_resource_len(pdev, 1));
1019                 if (!adapter->hw.flash_address)
1020                         goto err_flashmap;
1021         }
1022
1023         if (e1000_check_phy_reset_block(&adapter->hw))
1024                 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1025
1026         if (adapter->hw.mac_type >= e1000_82543) {
1027                 netdev->features = NETIF_F_SG |
1028                                    NETIF_F_HW_CSUM |
1029                                    NETIF_F_HW_VLAN_TX |
1030                                    NETIF_F_HW_VLAN_RX |
1031                                    NETIF_F_HW_VLAN_FILTER;
1032                 if (adapter->hw.mac_type == e1000_ich8lan)
1033                         netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1034         }
1035
1036         if ((adapter->hw.mac_type >= e1000_82544) &&
1037            (adapter->hw.mac_type != e1000_82547))
1038                 netdev->features |= NETIF_F_TSO;
1039
1040         if (adapter->hw.mac_type > e1000_82547_rev_2)
1041                 netdev->features |= NETIF_F_TSO6;
1042         if (pci_using_dac)
1043                 netdev->features |= NETIF_F_HIGHDMA;
1044
1045         netdev->features |= NETIF_F_LLTX;
1046
1047         adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
1048
1049         /* initialize eeprom parameters */
1050         if (e1000_init_eeprom_params(&adapter->hw)) {
1051                 E1000_ERR("EEPROM initialization failed\n");
1052                 goto err_eeprom;
1053         }
1054
1055         /* before reading the EEPROM, reset the controller to
1056          * put the device in a known good starting state */
1057
1058         e1000_reset_hw(&adapter->hw);
1059
1060         /* make sure the EEPROM is good */
1061         if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
1062                 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1063                 e1000_dump_eeprom(adapter);
1064                 /*
1065                  * set MAC address to all zeroes to invalidate and temporary
1066                  * disable this device for the user. This blocks regular
1067                  * traffic while still permitting ethtool ioctls from reaching
1068                  * the hardware as well as allowing the user to run the
1069                  * interface after manually setting a hw addr using
1070                  * `ip set address`
1071                  */
1072                 memset(adapter->hw.mac_addr, 0, netdev->addr_len);
1073         } else {
1074                 /* copy the MAC address out of the EEPROM */
1075                 if (e1000_read_mac_addr(&adapter->hw))
1076                         DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1077         }
1078         /* don't block initalization here due to bad MAC address */
1079         memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
1080         memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
1081
1082         if (!is_valid_ether_addr(netdev->perm_addr))
1083                 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1084
1085         e1000_get_bus_info(&adapter->hw);
1086
1087         init_timer(&adapter->tx_fifo_stall_timer);
1088         adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1089         adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
1090
1091         init_timer(&adapter->watchdog_timer);
1092         adapter->watchdog_timer.function = &e1000_watchdog;
1093         adapter->watchdog_timer.data = (unsigned long) adapter;
1094
1095         init_timer(&adapter->phy_info_timer);
1096         adapter->phy_info_timer.function = &e1000_update_phy_info;
1097         adapter->phy_info_timer.data = (unsigned long) adapter;
1098
1099         INIT_WORK(&adapter->reset_task, e1000_reset_task);
1100
1101         e1000_check_options(adapter);
1102
1103         /* Initial Wake on LAN setting
1104          * If APM wake is enabled in the EEPROM,
1105          * enable the ACPI Magic Packet filter
1106          */
1107
1108         switch (adapter->hw.mac_type) {
1109         case e1000_82542_rev2_0:
1110         case e1000_82542_rev2_1:
1111         case e1000_82543:
1112                 break;
1113         case e1000_82544:
1114                 e1000_read_eeprom(&adapter->hw,
1115                         EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1116                 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1117                 break;
1118         case e1000_ich8lan:
1119                 e1000_read_eeprom(&adapter->hw,
1120                         EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1121                 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1122                 break;
1123         case e1000_82546:
1124         case e1000_82546_rev_3:
1125         case e1000_82571:
1126         case e1000_80003es2lan:
1127                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
1128                         e1000_read_eeprom(&adapter->hw,
1129                                 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1130                         break;
1131                 }
1132                 /* Fall Through */
1133         default:
1134                 e1000_read_eeprom(&adapter->hw,
1135                         EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1136                 break;
1137         }
1138         if (eeprom_data & eeprom_apme_mask)
1139                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1140
1141         /* now that we have the eeprom settings, apply the special cases
1142          * where the eeprom may be wrong or the board simply won't support
1143          * wake on lan on a particular port */
1144         switch (pdev->device) {
1145         case E1000_DEV_ID_82546GB_PCIE:
1146                 adapter->eeprom_wol = 0;
1147                 break;
1148         case E1000_DEV_ID_82546EB_FIBER:
1149         case E1000_DEV_ID_82546GB_FIBER:
1150         case E1000_DEV_ID_82571EB_FIBER:
1151                 /* Wake events only supported on port A for dual fiber
1152                  * regardless of eeprom setting */
1153                 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
1154                         adapter->eeprom_wol = 0;
1155                 break;
1156         case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1157         case E1000_DEV_ID_82571EB_QUAD_COPPER:
1158         case E1000_DEV_ID_82571EB_QUAD_FIBER:
1159         case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1160         case E1000_DEV_ID_82571PT_QUAD_COPPER:
1161                 /* if quad port adapter, disable WoL on all but port A */
1162                 if (global_quad_port_a != 0)
1163                         adapter->eeprom_wol = 0;
1164                 else
1165                         adapter->quad_port_a = 1;
1166                 /* Reset for multiple quad port adapters */
1167                 if (++global_quad_port_a == 4)
1168                         global_quad_port_a = 0;
1169                 break;
1170         }
1171
1172         /* initialize the wol settings based on the eeprom settings */
1173         adapter->wol = adapter->eeprom_wol;
1174
1175         /* print bus type/speed/width info */
1176         {
1177         struct e1000_hw *hw = &adapter->hw;
1178         DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1179                 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1180                  (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1181                 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1182                  (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1183                  (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1184                  (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1185                  (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1186                 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1187                  (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1188                  (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1189                  "32-bit"));
1190         }
1191
1192         printk("%s\n", print_mac(mac, netdev->dev_addr));
1193
1194         if (adapter->hw.bus_type == e1000_bus_type_pci_express) {
1195                 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1196                         "longer be supported by this driver in the future.\n",
1197                         pdev->vendor, pdev->device);
1198                 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1199                         "driver instead.\n");
1200         }
1201
1202         /* reset the hardware with the new settings */
1203         e1000_reset(adapter);
1204
1205         /* If the controller is 82573 and f/w is AMT, do not set
1206          * DRV_LOAD until the interface is up.  For all other cases,
1207          * let the f/w know that the h/w is now under the control
1208          * of the driver. */
1209         if (adapter->hw.mac_type != e1000_82573 ||
1210             !e1000_check_mng_mode(&adapter->hw))
1211                 e1000_get_hw_control(adapter);
1212
1213         /* tell the stack to leave us alone until e1000_open() is called */
1214         netif_carrier_off(netdev);
1215         netif_stop_queue(netdev);
1216
1217         strcpy(netdev->name, "eth%d");
1218         if ((err = register_netdev(netdev)))
1219                 goto err_register;
1220
1221         DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1222
1223         cards_found++;
1224         return 0;
1225
1226 err_register:
1227         e1000_release_hw_control(adapter);
1228 err_eeprom:
1229         if (!e1000_check_phy_reset_block(&adapter->hw))
1230                 e1000_phy_hw_reset(&adapter->hw);
1231
1232         if (adapter->hw.flash_address)
1233                 iounmap(adapter->hw.flash_address);
1234 err_flashmap:
1235 #ifdef CONFIG_E1000_NAPI
1236         for (i = 0; i < adapter->num_rx_queues; i++)
1237                 dev_put(&adapter->polling_netdev[i]);
1238 #endif
1239
1240         kfree(adapter->tx_ring);
1241         kfree(adapter->rx_ring);
1242 #ifdef CONFIG_E1000_NAPI
1243         kfree(adapter->polling_netdev);
1244 #endif
1245 err_sw_init:
1246         iounmap(adapter->hw.hw_addr);
1247 err_ioremap:
1248         free_netdev(netdev);
1249 err_alloc_etherdev:
1250         pci_release_regions(pdev);
1251 err_pci_reg:
1252 err_dma:
1253         pci_disable_device(pdev);
1254         return err;
1255 }
1256
1257 /**
1258  * e1000_remove - Device Removal Routine
1259  * @pdev: PCI device information struct
1260  *
1261  * e1000_remove is called by the PCI subsystem to alert the driver
1262  * that it should release a PCI device.  The could be caused by a
1263  * Hot-Plug event, or because the driver is going to be removed from
1264  * memory.
1265  **/
1266
1267 static void __devexit
1268 e1000_remove(struct pci_dev *pdev)
1269 {
1270         struct net_device *netdev = pci_get_drvdata(pdev);
1271         struct e1000_adapter *adapter = netdev_priv(netdev);
1272 #ifdef CONFIG_E1000_NAPI
1273         int i;
1274 #endif
1275
1276         cancel_work_sync(&adapter->reset_task);
1277
1278         e1000_release_manageability(adapter);
1279
1280         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1281          * would have already happened in close and is redundant. */
1282         e1000_release_hw_control(adapter);
1283
1284 #ifdef CONFIG_E1000_NAPI
1285         for (i = 0; i < adapter->num_rx_queues; i++)
1286                 dev_put(&adapter->polling_netdev[i]);
1287 #endif
1288
1289         unregister_netdev(netdev);
1290
1291         if (!e1000_check_phy_reset_block(&adapter->hw))
1292                 e1000_phy_hw_reset(&adapter->hw);
1293
1294         kfree(adapter->tx_ring);
1295         kfree(adapter->rx_ring);
1296 #ifdef CONFIG_E1000_NAPI
1297         kfree(adapter->polling_netdev);
1298 #endif
1299
1300         iounmap(adapter->hw.hw_addr);
1301         if (adapter->hw.flash_address)
1302                 iounmap(adapter->hw.flash_address);
1303         pci_release_regions(pdev);
1304
1305         free_netdev(netdev);
1306
1307         pci_disable_device(pdev);
1308 }
1309
1310 /**
1311  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1312  * @adapter: board private structure to initialize
1313  *
1314  * e1000_sw_init initializes the Adapter private data structure.
1315  * Fields are initialized based on PCI device information and
1316  * OS network device settings (MTU size).
1317  **/
1318
1319 static int __devinit
1320 e1000_sw_init(struct e1000_adapter *adapter)
1321 {
1322         struct e1000_hw *hw = &adapter->hw;
1323         struct net_device *netdev = adapter->netdev;
1324         struct pci_dev *pdev = adapter->pdev;
1325 #ifdef CONFIG_E1000_NAPI
1326         int i;
1327 #endif
1328
1329         /* PCI config space info */
1330
1331         hw->vendor_id = pdev->vendor;
1332         hw->device_id = pdev->device;
1333         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1334         hw->subsystem_id = pdev->subsystem_device;
1335         hw->revision_id = pdev->revision;
1336
1337         pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1338
1339         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1340         adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
1341         hw->max_frame_size = netdev->mtu +
1342                              ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1343         hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1344
1345         /* identify the MAC */
1346
1347         if (e1000_set_mac_type(hw)) {
1348                 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1349                 return -EIO;
1350         }
1351
1352         switch (hw->mac_type) {
1353         default:
1354                 break;
1355         case e1000_82541:
1356         case e1000_82547:
1357         case e1000_82541_rev_2:
1358         case e1000_82547_rev_2:
1359                 hw->phy_init_script = 1;
1360                 break;
1361         }
1362
1363         e1000_set_media_type(hw);
1364
1365         hw->wait_autoneg_complete = false;
1366         hw->tbi_compatibility_en = true;
1367         hw->adaptive_ifs = true;
1368
1369         /* Copper options */
1370
1371         if (hw->media_type == e1000_media_type_copper) {
1372                 hw->mdix = AUTO_ALL_MODES;
1373                 hw->disable_polarity_correction = false;
1374                 hw->master_slave = E1000_MASTER_SLAVE;
1375         }
1376
1377         adapter->num_tx_queues = 1;
1378         adapter->num_rx_queues = 1;
1379
1380         if (e1000_alloc_queues(adapter)) {
1381                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1382                 return -ENOMEM;
1383         }
1384
1385 #ifdef CONFIG_E1000_NAPI
1386         for (i = 0; i < adapter->num_rx_queues; i++) {
1387                 adapter->polling_netdev[i].priv = adapter;
1388                 dev_hold(&adapter->polling_netdev[i]);
1389                 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1390         }
1391         spin_lock_init(&adapter->tx_queue_lock);
1392 #endif
1393
1394         /* Explicitly disable IRQ since the NIC can be in any state. */
1395         e1000_irq_disable(adapter);
1396
1397         spin_lock_init(&adapter->stats_lock);
1398
1399         set_bit(__E1000_DOWN, &adapter->flags);
1400
1401         return 0;
1402 }
1403
1404 /**
1405  * e1000_alloc_queues - Allocate memory for all rings
1406  * @adapter: board private structure to initialize
1407  *
1408  * We allocate one ring per queue at run-time since we don't know the
1409  * number of queues at compile-time.  The polling_netdev array is
1410  * intended for Multiqueue, but should work fine with a single queue.
1411  **/
1412
1413 static int __devinit
1414 e1000_alloc_queues(struct e1000_adapter *adapter)
1415 {
1416         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1417                                    sizeof(struct e1000_tx_ring), GFP_KERNEL);
1418         if (!adapter->tx_ring)
1419                 return -ENOMEM;
1420
1421         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1422                                    sizeof(struct e1000_rx_ring), GFP_KERNEL);
1423         if (!adapter->rx_ring) {
1424                 kfree(adapter->tx_ring);
1425                 return -ENOMEM;
1426         }
1427
1428 #ifdef CONFIG_E1000_NAPI
1429         adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1430                                           sizeof(struct net_device),
1431                                           GFP_KERNEL);
1432         if (!adapter->polling_netdev) {
1433                 kfree(adapter->tx_ring);
1434                 kfree(adapter->rx_ring);
1435                 return -ENOMEM;
1436         }
1437 #endif
1438
1439         return E1000_SUCCESS;
1440 }
1441
1442 /**
1443  * e1000_open - Called when a network interface is made active
1444  * @netdev: network interface device structure
1445  *
1446  * Returns 0 on success, negative value on failure
1447  *
1448  * The open entry point is called when a network interface is made
1449  * active by the system (IFF_UP).  At this point all resources needed
1450  * for transmit and receive operations are allocated, the interrupt
1451  * handler is registered with the OS, the watchdog timer is started,
1452  * and the stack is notified that the interface is ready.
1453  **/
1454
1455 static int
1456 e1000_open(struct net_device *netdev)
1457 {
1458         struct e1000_adapter *adapter = netdev_priv(netdev);
1459         int err;
1460
1461         /* disallow open during test */
1462         if (test_bit(__E1000_TESTING, &adapter->flags))
1463                 return -EBUSY;
1464
1465         /* allocate transmit descriptors */
1466         err = e1000_setup_all_tx_resources(adapter);
1467         if (err)
1468                 goto err_setup_tx;
1469
1470         /* allocate receive descriptors */
1471         err = e1000_setup_all_rx_resources(adapter);
1472         if (err)
1473                 goto err_setup_rx;
1474
1475         e1000_power_up_phy(adapter);
1476
1477         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1478         if ((adapter->hw.mng_cookie.status &
1479                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1480                 e1000_update_mng_vlan(adapter);
1481         }
1482
1483         /* If AMT is enabled, let the firmware know that the network
1484          * interface is now open */
1485         if (adapter->hw.mac_type == e1000_82573 &&
1486             e1000_check_mng_mode(&adapter->hw))
1487                 e1000_get_hw_control(adapter);
1488
1489         /* before we allocate an interrupt, we must be ready to handle it.
1490          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1491          * as soon as we call pci_request_irq, so we have to setup our
1492          * clean_rx handler before we do so.  */
1493         e1000_configure(adapter);
1494
1495         err = e1000_request_irq(adapter);
1496         if (err)
1497                 goto err_req_irq;
1498
1499         /* From here on the code is the same as e1000_up() */
1500         clear_bit(__E1000_DOWN, &adapter->flags);
1501
1502 #ifdef CONFIG_E1000_NAPI
1503         napi_enable(&adapter->napi);
1504 #endif
1505
1506         e1000_irq_enable(adapter);
1507
1508         /* fire a link status change interrupt to start the watchdog */
1509         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
1510
1511         return E1000_SUCCESS;
1512
1513 err_req_irq:
1514         e1000_release_hw_control(adapter);
1515         e1000_power_down_phy(adapter);
1516         e1000_free_all_rx_resources(adapter);
1517 err_setup_rx:
1518         e1000_free_all_tx_resources(adapter);
1519 err_setup_tx:
1520         e1000_reset(adapter);
1521
1522         return err;
1523 }
1524
1525 /**
1526  * e1000_close - Disables a network interface
1527  * @netdev: network interface device structure
1528  *
1529  * Returns 0, this is not allowed to fail
1530  *
1531  * The close entry point is called when an interface is de-activated
1532  * by the OS.  The hardware is still under the drivers control, but
1533  * needs to be disabled.  A global MAC reset is issued to stop the
1534  * hardware, and all transmit and receive resources are freed.
1535  **/
1536
1537 static int
1538 e1000_close(struct net_device *netdev)
1539 {
1540         struct e1000_adapter *adapter = netdev_priv(netdev);
1541
1542         WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1543         e1000_down(adapter);
1544         e1000_power_down_phy(adapter);
1545         e1000_free_irq(adapter);
1546
1547         e1000_free_all_tx_resources(adapter);
1548         e1000_free_all_rx_resources(adapter);
1549
1550         /* kill manageability vlan ID if supported, but not if a vlan with
1551          * the same ID is registered on the host OS (let 8021q kill it) */
1552         if ((adapter->hw.mng_cookie.status &
1553                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1554              !(adapter->vlgrp &&
1555                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1556                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1557         }
1558
1559         /* If AMT is enabled, let the firmware know that the network
1560          * interface is now closed */
1561         if (adapter->hw.mac_type == e1000_82573 &&
1562             e1000_check_mng_mode(&adapter->hw))
1563                 e1000_release_hw_control(adapter);
1564
1565         return 0;
1566 }
1567
1568 /**
1569  * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1570  * @adapter: address of board private structure
1571  * @start: address of beginning of memory
1572  * @len: length of memory
1573  **/
1574 static bool
1575 e1000_check_64k_bound(struct e1000_adapter *adapter,
1576                       void *start, unsigned long len)
1577 {
1578         unsigned long begin = (unsigned long) start;
1579         unsigned long end = begin + len;
1580
1581         /* First rev 82545 and 82546 need to not allow any memory
1582          * write location to cross 64k boundary due to errata 23 */
1583         if (adapter->hw.mac_type == e1000_82545 ||
1584             adapter->hw.mac_type == e1000_82546) {
1585                 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1586         }
1587
1588         return true;
1589 }
1590
1591 /**
1592  * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1593  * @adapter: board private structure
1594  * @txdr:    tx descriptor ring (for a specific queue) to setup
1595  *
1596  * Return 0 on success, negative on failure
1597  **/
1598
1599 static int
1600 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1601                          struct e1000_tx_ring *txdr)
1602 {
1603         struct pci_dev *pdev = adapter->pdev;
1604         int size;
1605
1606         size = sizeof(struct e1000_buffer) * txdr->count;
1607         txdr->buffer_info = vmalloc(size);
1608         if (!txdr->buffer_info) {
1609                 DPRINTK(PROBE, ERR,
1610                 "Unable to allocate memory for the transmit descriptor ring\n");
1611                 return -ENOMEM;
1612         }
1613         memset(txdr->buffer_info, 0, size);
1614
1615         /* round up to nearest 4K */
1616
1617         txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1618         txdr->size = ALIGN(txdr->size, 4096);
1619
1620         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1621         if (!txdr->desc) {
1622 setup_tx_desc_die:
1623                 vfree(txdr->buffer_info);
1624                 DPRINTK(PROBE, ERR,
1625                 "Unable to allocate memory for the transmit descriptor ring\n");
1626                 return -ENOMEM;
1627         }
1628
1629         /* Fix for errata 23, can't cross 64kB boundary */
1630         if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1631                 void *olddesc = txdr->desc;
1632                 dma_addr_t olddma = txdr->dma;
1633                 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1634                                      "at %p\n", txdr->size, txdr->desc);
1635                 /* Try again, without freeing the previous */
1636                 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1637                 /* Failed allocation, critical failure */
1638                 if (!txdr->desc) {
1639                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1640                         goto setup_tx_desc_die;
1641                 }
1642
1643                 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1644                         /* give up */
1645                         pci_free_consistent(pdev, txdr->size, txdr->desc,
1646                                             txdr->dma);
1647                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1648                         DPRINTK(PROBE, ERR,
1649                                 "Unable to allocate aligned memory "
1650                                 "for the transmit descriptor ring\n");
1651                         vfree(txdr->buffer_info);
1652                         return -ENOMEM;
1653                 } else {
1654                         /* Free old allocation, new allocation was successful */
1655                         pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1656                 }
1657         }
1658         memset(txdr->desc, 0, txdr->size);
1659
1660         txdr->next_to_use = 0;
1661         txdr->next_to_clean = 0;
1662         spin_lock_init(&txdr->tx_lock);
1663
1664         return 0;
1665 }
1666
1667 /**
1668  * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1669  *                                (Descriptors) for all queues
1670  * @adapter: board private structure
1671  *
1672  * Return 0 on success, negative on failure
1673  **/
1674
1675 int
1676 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1677 {
1678         int i, err = 0;
1679
1680         for (i = 0; i < adapter->num_tx_queues; i++) {
1681                 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1682                 if (err) {
1683                         DPRINTK(PROBE, ERR,
1684                                 "Allocation for Tx Queue %u failed\n", i);
1685                         for (i-- ; i >= 0; i--)
1686                                 e1000_free_tx_resources(adapter,
1687                                                         &adapter->tx_ring[i]);
1688                         break;
1689                 }
1690         }
1691
1692         return err;
1693 }
1694
1695 /**
1696  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1697  * @adapter: board private structure
1698  *
1699  * Configure the Tx unit of the MAC after a reset.
1700  **/
1701
1702 static void
1703 e1000_configure_tx(struct e1000_adapter *adapter)
1704 {
1705         uint64_t tdba;
1706         struct e1000_hw *hw = &adapter->hw;
1707         uint32_t tdlen, tctl, tipg, tarc;
1708         uint32_t ipgr1, ipgr2;
1709
1710         /* Setup the HW Tx Head and Tail descriptor pointers */
1711
1712         switch (adapter->num_tx_queues) {
1713         case 1:
1714         default:
1715                 tdba = adapter->tx_ring[0].dma;
1716                 tdlen = adapter->tx_ring[0].count *
1717                         sizeof(struct e1000_tx_desc);
1718                 E1000_WRITE_REG(hw, TDLEN, tdlen);
1719                 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1720                 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1721                 E1000_WRITE_REG(hw, TDT, 0);
1722                 E1000_WRITE_REG(hw, TDH, 0);
1723                 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1724                 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1725                 break;
1726         }
1727
1728         /* Set the default values for the Tx Inter Packet Gap timer */
1729         if (adapter->hw.mac_type <= e1000_82547_rev_2 &&
1730             (hw->media_type == e1000_media_type_fiber ||
1731              hw->media_type == e1000_media_type_internal_serdes))
1732                 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1733         else
1734                 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1735
1736         switch (hw->mac_type) {
1737         case e1000_82542_rev2_0:
1738         case e1000_82542_rev2_1:
1739                 tipg = DEFAULT_82542_TIPG_IPGT;
1740                 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1741                 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1742                 break;
1743         case e1000_80003es2lan:
1744                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1745                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1746                 break;
1747         default:
1748                 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1749                 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1750                 break;
1751         }
1752         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1753         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1754         E1000_WRITE_REG(hw, TIPG, tipg);
1755
1756         /* Set the Tx Interrupt Delay register */
1757
1758         E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1759         if (hw->mac_type >= e1000_82540)
1760                 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1761
1762         /* Program the Transmit Control Register */
1763
1764         tctl = E1000_READ_REG(hw, TCTL);
1765         tctl &= ~E1000_TCTL_CT;
1766         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1767                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1768
1769         if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1770                 tarc = E1000_READ_REG(hw, TARC0);
1771                 /* set the speed mode bit, we'll clear it if we're not at
1772                  * gigabit link later */
1773                 tarc |= (1 << 21);
1774                 E1000_WRITE_REG(hw, TARC0, tarc);
1775         } else if (hw->mac_type == e1000_80003es2lan) {
1776                 tarc = E1000_READ_REG(hw, TARC0);
1777                 tarc |= 1;
1778                 E1000_WRITE_REG(hw, TARC0, tarc);
1779                 tarc = E1000_READ_REG(hw, TARC1);
1780                 tarc |= 1;
1781                 E1000_WRITE_REG(hw, TARC1, tarc);
1782         }
1783
1784         e1000_config_collision_dist(hw);
1785
1786         /* Setup Transmit Descriptor Settings for eop descriptor */
1787         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1788
1789         /* only set IDE if we are delaying interrupts using the timers */
1790         if (adapter->tx_int_delay)
1791                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1792
1793         if (hw->mac_type < e1000_82543)
1794                 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1795         else
1796                 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1797
1798         /* Cache if we're 82544 running in PCI-X because we'll
1799          * need this to apply a workaround later in the send path. */
1800         if (hw->mac_type == e1000_82544 &&
1801             hw->bus_type == e1000_bus_type_pcix)
1802                 adapter->pcix_82544 = 1;
1803
1804         E1000_WRITE_REG(hw, TCTL, tctl);
1805
1806 }
1807
1808 /**
1809  * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1810  * @adapter: board private structure
1811  * @rxdr:    rx descriptor ring (for a specific queue) to setup
1812  *
1813  * Returns 0 on success, negative on failure
1814  **/
1815
1816 static int
1817 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1818                          struct e1000_rx_ring *rxdr)
1819 {
1820         struct pci_dev *pdev = adapter->pdev;
1821         int size, desc_len;
1822
1823         size = sizeof(struct e1000_buffer) * rxdr->count;
1824         rxdr->buffer_info = vmalloc(size);
1825         if (!rxdr->buffer_info) {
1826                 DPRINTK(PROBE, ERR,
1827                 "Unable to allocate memory for the receive descriptor ring\n");
1828                 return -ENOMEM;
1829         }
1830         memset(rxdr->buffer_info, 0, size);
1831
1832         rxdr->ps_page = kcalloc(rxdr->count, sizeof(struct e1000_ps_page),
1833                                 GFP_KERNEL);
1834         if (!rxdr->ps_page) {
1835                 vfree(rxdr->buffer_info);
1836                 DPRINTK(PROBE, ERR,
1837                 "Unable to allocate memory for the receive descriptor ring\n");
1838                 return -ENOMEM;
1839         }
1840
1841         rxdr->ps_page_dma = kcalloc(rxdr->count,
1842                                     sizeof(struct e1000_ps_page_dma),
1843                                     GFP_KERNEL);
1844         if (!rxdr->ps_page_dma) {
1845                 vfree(rxdr->buffer_info);
1846                 kfree(rxdr->ps_page);
1847                 DPRINTK(PROBE, ERR,
1848                 "Unable to allocate memory for the receive descriptor ring\n");
1849                 return -ENOMEM;
1850         }
1851
1852         if (adapter->hw.mac_type <= e1000_82547_rev_2)
1853                 desc_len = sizeof(struct e1000_rx_desc);
1854         else
1855                 desc_len = sizeof(union e1000_rx_desc_packet_split);
1856
1857         /* Round up to nearest 4K */
1858
1859         rxdr->size = rxdr->count * desc_len;
1860         rxdr->size = ALIGN(rxdr->size, 4096);
1861
1862         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1863
1864         if (!rxdr->desc) {
1865                 DPRINTK(PROBE, ERR,
1866                 "Unable to allocate memory for the receive descriptor ring\n");
1867 setup_rx_desc_die:
1868                 vfree(rxdr->buffer_info);
1869                 kfree(rxdr->ps_page);
1870                 kfree(rxdr->ps_page_dma);
1871                 return -ENOMEM;
1872         }
1873
1874         /* Fix for errata 23, can't cross 64kB boundary */
1875         if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1876                 void *olddesc = rxdr->desc;
1877                 dma_addr_t olddma = rxdr->dma;
1878                 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1879                                      "at %p\n", rxdr->size, rxdr->desc);
1880                 /* Try again, without freeing the previous */
1881                 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1882                 /* Failed allocation, critical failure */
1883                 if (!rxdr->desc) {
1884                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1885                         DPRINTK(PROBE, ERR,
1886                                 "Unable to allocate memory "
1887                                 "for the receive descriptor ring\n");
1888                         goto setup_rx_desc_die;
1889                 }
1890
1891                 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1892                         /* give up */
1893                         pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1894                                             rxdr->dma);
1895                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1896                         DPRINTK(PROBE, ERR,
1897                                 "Unable to allocate aligned memory "
1898                                 "for the receive descriptor ring\n");
1899                         goto setup_rx_desc_die;
1900                 } else {
1901                         /* Free old allocation, new allocation was successful */
1902                         pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1903                 }
1904         }
1905         memset(rxdr->desc, 0, rxdr->size);
1906
1907         rxdr->next_to_clean = 0;
1908         rxdr->next_to_use = 0;
1909
1910         return 0;
1911 }
1912
1913 /**
1914  * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1915  *                                (Descriptors) for all queues
1916  * @adapter: board private structure
1917  *
1918  * Return 0 on success, negative on failure
1919  **/
1920
1921 int
1922 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1923 {
1924         int i, err = 0;
1925
1926         for (i = 0; i < adapter->num_rx_queues; i++) {
1927                 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1928                 if (err) {
1929                         DPRINTK(PROBE, ERR,
1930                                 "Allocation for Rx Queue %u failed\n", i);
1931                         for (i-- ; i >= 0; i--)
1932                                 e1000_free_rx_resources(adapter,
1933                                                         &adapter->rx_ring[i]);
1934                         break;
1935                 }
1936         }
1937
1938         return err;
1939 }
1940
1941 /**
1942  * e1000_setup_rctl - configure the receive control registers
1943  * @adapter: Board private structure
1944  **/
1945 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1946                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1947 static void
1948 e1000_setup_rctl(struct e1000_adapter *adapter)
1949 {
1950         uint32_t rctl, rfctl;
1951         uint32_t psrctl = 0;
1952 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1953         uint32_t pages = 0;
1954 #endif
1955
1956         rctl = E1000_READ_REG(&adapter->hw, RCTL);
1957
1958         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1959
1960         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1961                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1962                 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1963
1964         if (adapter->hw.tbi_compatibility_on == 1)
1965                 rctl |= E1000_RCTL_SBP;
1966         else
1967                 rctl &= ~E1000_RCTL_SBP;
1968
1969         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1970                 rctl &= ~E1000_RCTL_LPE;
1971         else
1972                 rctl |= E1000_RCTL_LPE;
1973
1974         /* Setup buffer sizes */
1975         rctl &= ~E1000_RCTL_SZ_4096;
1976         rctl |= E1000_RCTL_BSEX;
1977         switch (adapter->rx_buffer_len) {
1978                 case E1000_RXBUFFER_256:
1979                         rctl |= E1000_RCTL_SZ_256;
1980                         rctl &= ~E1000_RCTL_BSEX;
1981                         break;
1982                 case E1000_RXBUFFER_512:
1983                         rctl |= E1000_RCTL_SZ_512;
1984                         rctl &= ~E1000_RCTL_BSEX;
1985                         break;
1986                 case E1000_RXBUFFER_1024:
1987                         rctl |= E1000_RCTL_SZ_1024;
1988                         rctl &= ~E1000_RCTL_BSEX;
1989                         break;
1990                 case E1000_RXBUFFER_2048:
1991                 default:
1992                         rctl |= E1000_RCTL_SZ_2048;
1993                         rctl &= ~E1000_RCTL_BSEX;
1994                         break;
1995                 case E1000_RXBUFFER_4096:
1996                         rctl |= E1000_RCTL_SZ_4096;
1997                         break;
1998                 case E1000_RXBUFFER_8192:
1999                         rctl |= E1000_RCTL_SZ_8192;
2000                         break;
2001                 case E1000_RXBUFFER_16384:
2002                         rctl |= E1000_RCTL_SZ_16384;
2003                         break;
2004         }
2005
2006 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
2007         /* 82571 and greater support packet-split where the protocol
2008          * header is placed in skb->data and the packet data is
2009          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2010          * In the case of a non-split, skb->data is linearly filled,
2011          * followed by the page buffers.  Therefore, skb->data is
2012          * sized to hold the largest protocol header.
2013          */
2014         /* allocations using alloc_page take too long for regular MTU
2015          * so only enable packet split for jumbo frames */
2016         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2017         if ((adapter->hw.mac_type >= e1000_82571) && (pages <= 3) &&
2018             PAGE_SIZE <= 16384 && (rctl & E1000_RCTL_LPE))
2019                 adapter->rx_ps_pages = pages;
2020         else
2021                 adapter->rx_ps_pages = 0;
2022 #endif
2023         if (adapter->rx_ps_pages) {
2024                 /* Configure extra packet-split registers */
2025                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
2026                 rfctl |= E1000_RFCTL_EXTEN;
2027                 /* disable packet split support for IPv6 extension headers,
2028                  * because some malformed IPv6 headers can hang the RX */
2029                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2030                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2031
2032                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
2033
2034                 rctl |= E1000_RCTL_DTYP_PS;
2035
2036                 psrctl |= adapter->rx_ps_bsize0 >>
2037                         E1000_PSRCTL_BSIZE0_SHIFT;
2038
2039                 switch (adapter->rx_ps_pages) {
2040                 case 3:
2041                         psrctl |= PAGE_SIZE <<
2042                                 E1000_PSRCTL_BSIZE3_SHIFT;
2043                 case 2:
2044                         psrctl |= PAGE_SIZE <<
2045                                 E1000_PSRCTL_BSIZE2_SHIFT;
2046                 case 1:
2047                         psrctl |= PAGE_SIZE >>
2048                                 E1000_PSRCTL_BSIZE1_SHIFT;
2049                         break;
2050                 }
2051
2052                 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
2053         }
2054
2055         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2056 }
2057
2058 /**
2059  * e1000_configure_rx - Configure 8254x Receive Unit after Reset
2060  * @adapter: board private structure
2061  *
2062  * Configure the Rx unit of the MAC after a reset.
2063  **/
2064
2065 static void
2066 e1000_configure_rx(struct e1000_adapter *adapter)
2067 {
2068         uint64_t rdba;
2069         struct e1000_hw *hw = &adapter->hw;
2070         uint32_t rdlen, rctl, rxcsum, ctrl_ext;
2071
2072         if (adapter->rx_ps_pages) {
2073                 /* this is a 32 byte descriptor */
2074                 rdlen = adapter->rx_ring[0].count *
2075                         sizeof(union e1000_rx_desc_packet_split);
2076                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2077                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2078         } else {
2079                 rdlen = adapter->rx_ring[0].count *
2080                         sizeof(struct e1000_rx_desc);
2081                 adapter->clean_rx = e1000_clean_rx_irq;
2082                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2083         }
2084
2085         /* disable receives while setting up the descriptors */
2086         rctl = E1000_READ_REG(hw, RCTL);
2087         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
2088
2089         /* set the Receive Delay Timer Register */
2090         E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
2091
2092         if (hw->mac_type >= e1000_82540) {
2093                 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
2094                 if (adapter->itr_setting != 0)
2095                         E1000_WRITE_REG(hw, ITR,
2096                                 1000000000 / (adapter->itr * 256));
2097         }
2098
2099         if (hw->mac_type >= e1000_82571) {
2100                 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
2101                 /* Reset delay timers after every interrupt */
2102                 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2103 #ifdef CONFIG_E1000_NAPI
2104                 /* Auto-Mask interrupts upon ICR access */
2105                 ctrl_ext |= E1000_CTRL_EXT_IAME;
2106                 E1000_WRITE_REG(hw, IAM, 0xffffffff);
2107 #endif
2108                 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
2109                 E1000_WRITE_FLUSH(hw);
2110         }
2111
2112         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2113          * the Base and Length of the Rx Descriptor Ring */
2114         switch (adapter->num_rx_queues) {
2115         case 1:
2116         default:
2117                 rdba = adapter->rx_ring[0].dma;
2118                 E1000_WRITE_REG(hw, RDLEN, rdlen);
2119                 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
2120                 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
2121                 E1000_WRITE_REG(hw, RDT, 0);
2122                 E1000_WRITE_REG(hw, RDH, 0);
2123                 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2124                 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2125                 break;
2126         }
2127
2128         /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2129         if (hw->mac_type >= e1000_82543) {
2130                 rxcsum = E1000_READ_REG(hw, RXCSUM);
2131                 if (adapter->rx_csum) {
2132                         rxcsum |= E1000_RXCSUM_TUOFL;
2133
2134                         /* Enable 82571 IPv4 payload checksum for UDP fragments
2135                          * Must be used in conjunction with packet-split. */
2136                         if ((hw->mac_type >= e1000_82571) &&
2137                             (adapter->rx_ps_pages)) {
2138                                 rxcsum |= E1000_RXCSUM_IPPCSE;
2139                         }
2140                 } else {
2141                         rxcsum &= ~E1000_RXCSUM_TUOFL;
2142                         /* don't need to clear IPPCSE as it defaults to 0 */
2143                 }
2144                 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
2145         }
2146
2147         /* enable early receives on 82573, only takes effect if using > 2048
2148          * byte total frame size.  for example only for jumbo frames */
2149 #define E1000_ERT_2048 0x100
2150         if (hw->mac_type == e1000_82573)
2151                 E1000_WRITE_REG(hw, ERT, E1000_ERT_2048);
2152
2153         /* Enable Receives */
2154         E1000_WRITE_REG(hw, RCTL, rctl);
2155 }
2156
2157 /**
2158  * e1000_free_tx_resources - Free Tx Resources per Queue
2159  * @adapter: board private structure
2160  * @tx_ring: Tx descriptor ring for a specific queue
2161  *
2162  * Free all transmit software resources
2163  **/
2164
2165 static void
2166 e1000_free_tx_resources(struct e1000_adapter *adapter,
2167                         struct e1000_tx_ring *tx_ring)
2168 {
2169         struct pci_dev *pdev = adapter->pdev;
2170
2171         e1000_clean_tx_ring(adapter, tx_ring);
2172
2173         vfree(tx_ring->buffer_info);
2174         tx_ring->buffer_info = NULL;
2175
2176         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2177
2178         tx_ring->desc = NULL;
2179 }
2180
2181 /**
2182  * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2183  * @adapter: board private structure
2184  *
2185  * Free all transmit software resources
2186  **/
2187
2188 void
2189 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2190 {
2191         int i;
2192
2193         for (i = 0; i < adapter->num_tx_queues; i++)
2194                 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2195 }
2196
2197 static void
2198 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2199                         struct e1000_buffer *buffer_info)
2200 {
2201         if (buffer_info->dma) {
2202                 pci_unmap_page(adapter->pdev,
2203                                 buffer_info->dma,
2204                                 buffer_info->length,
2205                                 PCI_DMA_TODEVICE);
2206                 buffer_info->dma = 0;
2207         }
2208         if (buffer_info->skb) {
2209                 dev_kfree_skb_any(buffer_info->skb);
2210                 buffer_info->skb = NULL;
2211         }
2212         /* buffer_info must be completely set up in the transmit path */
2213 }
2214
2215 /**
2216  * e1000_clean_tx_ring - Free Tx Buffers
2217  * @adapter: board private structure
2218  * @tx_ring: ring to be cleaned
2219  **/
2220
2221 static void
2222 e1000_clean_tx_ring(struct e1000_adapter *adapter,
2223                     struct e1000_tx_ring *tx_ring)
2224 {
2225         struct e1000_buffer *buffer_info;
2226         unsigned long size;
2227         unsigned int i;
2228
2229         /* Free all the Tx ring sk_buffs */
2230
2231         for (i = 0; i < tx_ring->count; i++) {
2232                 buffer_info = &tx_ring->buffer_info[i];
2233                 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2234         }
2235
2236         size = sizeof(struct e1000_buffer) * tx_ring->count;
2237         memset(tx_ring->buffer_info, 0, size);
2238
2239         /* Zero out the descriptor ring */
2240
2241         memset(tx_ring->desc, 0, tx_ring->size);
2242
2243         tx_ring->next_to_use = 0;
2244         tx_ring->next_to_clean = 0;
2245         tx_ring->last_tx_tso = 0;
2246
2247         writel(0, adapter->hw.hw_addr + tx_ring->tdh);
2248         writel(0, adapter->hw.hw_addr + tx_ring->tdt);
2249 }
2250
2251 /**
2252  * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2253  * @adapter: board private structure
2254  **/
2255
2256 static void
2257 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2258 {
2259         int i;
2260
2261         for (i = 0; i < adapter->num_tx_queues; i++)
2262                 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2263 }
2264
2265 /**
2266  * e1000_free_rx_resources - Free Rx Resources
2267  * @adapter: board private structure
2268  * @rx_ring: ring to clean the resources from
2269  *
2270  * Free all receive software resources
2271  **/
2272
2273 static void
2274 e1000_free_rx_resources(struct e1000_adapter *adapter,
2275                         struct e1000_rx_ring *rx_ring)
2276 {
2277         struct pci_dev *pdev = adapter->pdev;
2278
2279         e1000_clean_rx_ring(adapter, rx_ring);
2280
2281         vfree(rx_ring->buffer_info);
2282         rx_ring->buffer_info = NULL;
2283         kfree(rx_ring->ps_page);
2284         rx_ring->ps_page = NULL;
2285         kfree(rx_ring->ps_page_dma);
2286         rx_ring->ps_page_dma = NULL;
2287
2288         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2289
2290         rx_ring->desc = NULL;
2291 }
2292
2293 /**
2294  * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2295  * @adapter: board private structure
2296  *
2297  * Free all receive software resources
2298  **/
2299
2300 void
2301 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2302 {
2303         int i;
2304
2305         for (i = 0; i < adapter->num_rx_queues; i++)
2306                 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2307 }
2308
2309 /**
2310  * e1000_clean_rx_ring - Free Rx Buffers per Queue
2311  * @adapter: board private structure
2312  * @rx_ring: ring to free buffers from
2313  **/
2314
2315 static void
2316 e1000_clean_rx_ring(struct e1000_adapter *adapter,
2317                     struct e1000_rx_ring *rx_ring)
2318 {
2319         struct e1000_buffer *buffer_info;
2320         struct e1000_ps_page *ps_page;
2321         struct e1000_ps_page_dma *ps_page_dma;
2322         struct pci_dev *pdev = adapter->pdev;
2323         unsigned long size;
2324         unsigned int i, j;
2325
2326         /* Free all the Rx ring sk_buffs */
2327         for (i = 0; i < rx_ring->count; i++) {
2328                 buffer_info = &rx_ring->buffer_info[i];
2329                 if (buffer_info->skb) {
2330                         pci_unmap_single(pdev,
2331                                          buffer_info->dma,
2332                                          buffer_info->length,
2333                                          PCI_DMA_FROMDEVICE);
2334
2335                         dev_kfree_skb(buffer_info->skb);
2336                         buffer_info->skb = NULL;
2337                 }
2338                 ps_page = &rx_ring->ps_page[i];
2339                 ps_page_dma = &rx_ring->ps_page_dma[i];
2340                 for (j = 0; j < adapter->rx_ps_pages; j++) {
2341                         if (!ps_page->ps_page[j]) break;
2342                         pci_unmap_page(pdev,
2343                                        ps_page_dma->ps_page_dma[j],
2344                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
2345                         ps_page_dma->ps_page_dma[j] = 0;
2346                         put_page(ps_page->ps_page[j]);
2347                         ps_page->ps_page[j] = NULL;
2348                 }
2349         }
2350
2351         size = sizeof(struct e1000_buffer) * rx_ring->count;
2352         memset(rx_ring->buffer_info, 0, size);
2353         size = sizeof(struct e1000_ps_page) * rx_ring->count;
2354         memset(rx_ring->ps_page, 0, size);
2355         size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2356         memset(rx_ring->ps_page_dma, 0, size);
2357
2358         /* Zero out the descriptor ring */
2359
2360         memset(rx_ring->desc, 0, rx_ring->size);
2361
2362         rx_ring->next_to_clean = 0;
2363         rx_ring->next_to_use = 0;
2364
2365         writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2366         writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2367 }
2368
2369 /**
2370  * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2371  * @adapter: board private structure
2372  **/
2373
2374 static void
2375 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2376 {
2377         int i;
2378
2379         for (i = 0; i < adapter->num_rx_queues; i++)
2380                 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2381 }
2382
2383 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2384  * and memory write and invalidate disabled for certain operations
2385  */
2386 static void
2387 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2388 {
2389         struct net_device *netdev = adapter->netdev;
2390         uint32_t rctl;
2391
2392         e1000_pci_clear_mwi(&adapter->hw);
2393
2394         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2395         rctl |= E1000_RCTL_RST;
2396         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2397         E1000_WRITE_FLUSH(&adapter->hw);
2398         mdelay(5);
2399
2400         if (netif_running(netdev))
2401                 e1000_clean_all_rx_rings(adapter);
2402 }
2403
2404 static void
2405 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2406 {
2407         struct net_device *netdev = adapter->netdev;
2408         uint32_t rctl;
2409
2410         rctl = E1000_READ_REG(&adapter->hw, RCTL);
2411         rctl &= ~E1000_RCTL_RST;
2412         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2413         E1000_WRITE_FLUSH(&adapter->hw);
2414         mdelay(5);
2415
2416         if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2417                 e1000_pci_set_mwi(&adapter->hw);
2418
2419         if (netif_running(netdev)) {
2420                 /* No need to loop, because 82542 supports only 1 queue */
2421                 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2422                 e1000_configure_rx(adapter);
2423                 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2424         }
2425 }
2426
2427 /**
2428  * e1000_set_mac - Change the Ethernet Address of the NIC
2429  * @netdev: network interface device structure
2430  * @p: pointer to an address structure
2431  *
2432  * Returns 0 on success, negative on failure
2433  **/
2434
2435 static int
2436 e1000_set_mac(struct net_device *netdev, void *p)
2437 {
2438         struct e1000_adapter *adapter = netdev_priv(netdev);
2439         struct sockaddr *addr = p;
2440
2441         if (!is_valid_ether_addr(addr->sa_data))
2442                 return -EADDRNOTAVAIL;
2443
2444         /* 82542 2.0 needs to be in reset to write receive address registers */
2445
2446         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2447                 e1000_enter_82542_rst(adapter);
2448
2449         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2450         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2451
2452         e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2453
2454         /* With 82571 controllers, LAA may be overwritten (with the default)
2455          * due to controller reset from the other port. */
2456         if (adapter->hw.mac_type == e1000_82571) {
2457                 /* activate the work around */
2458                 adapter->hw.laa_is_present = 1;
2459
2460                 /* Hold a copy of the LAA in RAR[14] This is done so that
2461                  * between the time RAR[0] gets clobbered  and the time it
2462                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2463                  * of the RARs and no incoming packets directed to this port
2464                  * are dropped. Eventaully the LAA will be in RAR[0] and
2465                  * RAR[14] */
2466                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2467                                         E1000_RAR_ENTRIES - 1);
2468         }
2469
2470         if (adapter->hw.mac_type == e1000_82542_rev2_0)
2471                 e1000_leave_82542_rst(adapter);
2472
2473         return 0;
2474 }
2475
2476 /**
2477  * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2478  * @netdev: network interface device structure
2479  *
2480  * The set_rx_mode entry point is called whenever the unicast or multicast
2481  * address lists or the network interface flags are updated. This routine is
2482  * responsible for configuring the hardware for proper unicast, multicast,
2483  * promiscuous mode, and all-multi behavior.
2484  **/
2485
2486 static void
2487 e1000_set_rx_mode(struct net_device *netdev)
2488 {
2489         struct e1000_adapter *adapter = netdev_priv(netdev);
2490         struct e1000_hw *hw = &adapter->hw;
2491         struct dev_addr_list *uc_ptr;
2492         struct dev_addr_list *mc_ptr;
2493         uint32_t rctl;
2494         uint32_t hash_value;
2495         int i, rar_entries = E1000_RAR_ENTRIES;
2496         int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2497                                 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2498                                 E1000_NUM_MTA_REGISTERS;
2499
2500         if (adapter->hw.mac_type == e1000_ich8lan)
2501                 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2502
2503         /* reserve RAR[14] for LAA over-write work-around */
2504         if (adapter->hw.mac_type == e1000_82571)
2505                 rar_entries--;
2506
2507         /* Check for Promiscuous and All Multicast modes */
2508
2509         rctl = E1000_READ_REG(hw, RCTL);
2510
2511         if (netdev->flags & IFF_PROMISC) {
2512                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2513         } else if (netdev->flags & IFF_ALLMULTI) {
2514                 rctl |= E1000_RCTL_MPE;
2515         } else {
2516                 rctl &= ~E1000_RCTL_MPE;
2517         }
2518
2519         uc_ptr = NULL;
2520         if (netdev->uc_count > rar_entries - 1) {
2521                 rctl |= E1000_RCTL_UPE;
2522         } else if (!(netdev->flags & IFF_PROMISC)) {
2523                 rctl &= ~E1000_RCTL_UPE;
2524                 uc_ptr = netdev->uc_list;
2525         }
2526
2527         E1000_WRITE_REG(hw, RCTL, rctl);
2528
2529         /* 82542 2.0 needs to be in reset to write receive address registers */
2530
2531         if (hw->mac_type == e1000_82542_rev2_0)
2532                 e1000_enter_82542_rst(adapter);
2533
2534         /* load the first 14 addresses into the exact filters 1-14. Unicast
2535          * addresses take precedence to avoid disabling unicast filtering
2536          * when possible.
2537          *
2538          * RAR 0 is used for the station MAC adddress
2539          * if there are not 14 addresses, go ahead and clear the filters
2540          * -- with 82571 controllers only 0-13 entries are filled here
2541          */
2542         mc_ptr = netdev->mc_list;
2543
2544         for (i = 1; i < rar_entries; i++) {
2545                 if (uc_ptr) {
2546                         e1000_rar_set(hw, uc_ptr->da_addr, i);
2547                         uc_ptr = uc_ptr->next;
2548                 } else if (mc_ptr) {
2549                         e1000_rar_set(hw, mc_ptr->da_addr, i);
2550                         mc_ptr = mc_ptr->next;
2551                 } else {
2552                         E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2553                         E1000_WRITE_FLUSH(hw);
2554                         E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2555                         E1000_WRITE_FLUSH(hw);
2556                 }
2557         }
2558         WARN_ON(uc_ptr != NULL);
2559
2560         /* clear the old settings from the multicast hash table */
2561
2562         for (i = 0; i < mta_reg_count; i++) {
2563                 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2564                 E1000_WRITE_FLUSH(hw);
2565         }
2566
2567         /* load any remaining addresses into the hash table */
2568
2569         for (; mc_ptr; mc_ptr = mc_ptr->next) {
2570                 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2571                 e1000_mta_set(hw, hash_value);
2572         }
2573
2574         if (hw->mac_type == e1000_82542_rev2_0)
2575                 e1000_leave_82542_rst(adapter);
2576 }
2577
2578 /* Need to wait a few seconds after link up to get diagnostic information from
2579  * the phy */
2580
2581 static void
2582 e1000_update_phy_info(unsigned long data)
2583 {
2584         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2585         e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2586 }
2587
2588 /**
2589  * e1000_82547_tx_fifo_stall - Timer Call-back
2590  * @data: pointer to adapter cast into an unsigned long
2591  **/
2592
2593 static void
2594 e1000_82547_tx_fifo_stall(unsigned long data)
2595 {
2596         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2597         struct net_device *netdev = adapter->netdev;
2598         uint32_t tctl;
2599
2600         if (atomic_read(&adapter->tx_fifo_stall)) {
2601                 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2602                     E1000_READ_REG(&adapter->hw, TDH)) &&
2603                    (E1000_READ_REG(&adapter->hw, TDFT) ==
2604                     E1000_READ_REG(&adapter->hw, TDFH)) &&
2605                    (E1000_READ_REG(&adapter->hw, TDFTS) ==
2606                     E1000_READ_REG(&adapter->hw, TDFHS))) {
2607                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2608                         E1000_WRITE_REG(&adapter->hw, TCTL,
2609                                         tctl & ~E1000_TCTL_EN);
2610                         E1000_WRITE_REG(&adapter->hw, TDFT,
2611                                         adapter->tx_head_addr);
2612                         E1000_WRITE_REG(&adapter->hw, TDFH,
2613                                         adapter->tx_head_addr);
2614                         E1000_WRITE_REG(&adapter->hw, TDFTS,
2615                                         adapter->tx_head_addr);
2616                         E1000_WRITE_REG(&adapter->hw, TDFHS,
2617                                         adapter->tx_head_addr);
2618                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2619                         E1000_WRITE_FLUSH(&adapter->hw);
2620
2621                         adapter->tx_fifo_head = 0;
2622                         atomic_set(&adapter->tx_fifo_stall, 0);
2623                         netif_wake_queue(netdev);
2624                 } else {
2625                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2626                 }
2627         }
2628 }
2629
2630 /**
2631  * e1000_watchdog - Timer Call-back
2632  * @data: pointer to adapter cast into an unsigned long
2633  **/
2634 static void
2635 e1000_watchdog(unsigned long data)
2636 {
2637         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2638         struct net_device *netdev = adapter->netdev;
2639         struct e1000_tx_ring *txdr = adapter->tx_ring;
2640         uint32_t link, tctl;
2641         int32_t ret_val;
2642
2643         ret_val = e1000_check_for_link(&adapter->hw);
2644         if ((ret_val == E1000_ERR_PHY) &&
2645             (adapter->hw.phy_type == e1000_phy_igp_3) &&
2646             (E1000_READ_REG(&adapter->hw, CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2647                 /* See e1000_kumeran_lock_loss_workaround() */
2648                 DPRINTK(LINK, INFO,
2649                         "Gigabit has been disabled, downgrading speed\n");
2650         }
2651
2652         if (adapter->hw.mac_type == e1000_82573) {
2653                 e1000_enable_tx_pkt_filtering(&adapter->hw);
2654                 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2655                         e1000_update_mng_vlan(adapter);
2656         }
2657
2658         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2659            !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2660                 link = !adapter->hw.serdes_link_down;
2661         else
2662                 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2663
2664         if (link) {
2665                 if (!netif_carrier_ok(netdev)) {
2666                         uint32_t ctrl;
2667                         bool txb2b = true;
2668                         e1000_get_speed_and_duplex(&adapter->hw,
2669                                                    &adapter->link_speed,
2670                                                    &adapter->link_duplex);
2671
2672                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
2673                         DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s, "
2674                                 "Flow Control: %s\n",
2675                                 adapter->link_speed,
2676                                 adapter->link_duplex == FULL_DUPLEX ?
2677                                 "Full Duplex" : "Half Duplex",
2678                                 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2679                                 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2680                                 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2681                                 E1000_CTRL_TFCE) ? "TX" : "None" )));
2682
2683                         /* tweak tx_queue_len according to speed/duplex
2684                          * and adjust the timeout factor */
2685                         netdev->tx_queue_len = adapter->tx_queue_len;
2686                         adapter->tx_timeout_factor = 1;
2687                         switch (adapter->link_speed) {
2688                         case SPEED_10:
2689                                 txb2b = false;
2690                                 netdev->tx_queue_len = 10;
2691                                 adapter->tx_timeout_factor = 8;
2692                                 break;
2693                         case SPEED_100:
2694                                 txb2b = false;
2695                                 netdev->tx_queue_len = 100;
2696                                 /* maybe add some timeout factor ? */
2697                                 break;
2698                         }
2699
2700                         if ((adapter->hw.mac_type == e1000_82571 ||
2701                              adapter->hw.mac_type == e1000_82572) &&
2702                             !txb2b) {
2703                                 uint32_t tarc0;
2704                                 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2705                                 tarc0 &= ~(1 << 21);
2706                                 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2707                         }
2708
2709                         /* disable TSO for pcie and 10/100 speeds, to avoid
2710                          * some hardware issues */
2711                         if (!adapter->tso_force &&
2712                             adapter->hw.bus_type == e1000_bus_type_pci_express){
2713                                 switch (adapter->link_speed) {
2714                                 case SPEED_10:
2715                                 case SPEED_100:
2716                                         DPRINTK(PROBE,INFO,
2717                                         "10/100 speed: disabling TSO\n");
2718                                         netdev->features &= ~NETIF_F_TSO;
2719                                         netdev->features &= ~NETIF_F_TSO6;
2720                                         break;
2721                                 case SPEED_1000:
2722                                         netdev->features |= NETIF_F_TSO;
2723                                         netdev->features |= NETIF_F_TSO6;
2724                                         break;
2725                                 default:
2726                                         /* oops */
2727                                         break;
2728                                 }
2729                         }
2730
2731                         /* enable transmits in the hardware, need to do this
2732                          * after setting TARC0 */
2733                         tctl = E1000_READ_REG(&adapter->hw, TCTL);
2734                         tctl |= E1000_TCTL_EN;
2735                         E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2736
2737                         netif_carrier_on(netdev);
2738                         netif_wake_queue(netdev);
2739                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2740                         adapter->smartspeed = 0;
2741                 } else {
2742                         /* make sure the receive unit is started */
2743                         if (adapter->hw.rx_needs_kicking) {
2744                                 struct e1000_hw *hw = &adapter->hw;
2745                                 uint32_t rctl = E1000_READ_REG(hw, RCTL);
2746                                 E1000_WRITE_REG(hw, RCTL, rctl | E1000_RCTL_EN);
2747                         }
2748                 }
2749         } else {
2750                 if (netif_carrier_ok(netdev)) {
2751                         adapter->link_speed = 0;
2752                         adapter->link_duplex = 0;
2753                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2754                         netif_carrier_off(netdev);
2755                         netif_stop_queue(netdev);
2756                         mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2757
2758                         /* 80003ES2LAN workaround--
2759                          * For packet buffer work-around on link down event;
2760                          * disable receives in the ISR and
2761                          * reset device here in the watchdog
2762                          */
2763                         if (adapter->hw.mac_type == e1000_80003es2lan)
2764                                 /* reset device */
2765                                 schedule_work(&adapter->reset_task);
2766                 }
2767
2768                 e1000_smartspeed(adapter);
2769         }
2770
2771         e1000_update_stats(adapter);
2772
2773         adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2774         adapter->tpt_old = adapter->stats.tpt;
2775         adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2776         adapter->colc_old = adapter->stats.colc;
2777
2778         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2779         adapter->gorcl_old = adapter->stats.gorcl;
2780         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2781         adapter->gotcl_old = adapter->stats.gotcl;
2782
2783         e1000_update_adaptive(&adapter->hw);
2784
2785         if (!netif_carrier_ok(netdev)) {
2786                 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2787                         /* We've lost link, so the controller stops DMA,
2788                          * but we've got queued Tx work that's never going
2789                          * to get done, so reset controller to flush Tx.
2790                          * (Do the reset outside of interrupt context). */
2791                         adapter->tx_timeout_count++;
2792                         schedule_work(&adapter->reset_task);
2793                 }
2794         }
2795
2796         /* Cause software interrupt to ensure rx ring is cleaned */
2797         E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2798
2799         /* Force detection of hung controller every watchdog period */
2800         adapter->detect_tx_hung = true;
2801
2802         /* With 82571 controllers, LAA may be overwritten due to controller
2803          * reset from the other port. Set the appropriate LAA in RAR[0] */
2804         if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2805                 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2806
2807         /* Reset the timer */
2808         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2809 }
2810
2811 enum latency_range {
2812         lowest_latency = 0,
2813         low_latency = 1,
2814         bulk_latency = 2,
2815         latency_invalid = 255
2816 };
2817
2818 /**
2819  * e1000_update_itr - update the dynamic ITR value based on statistics
2820  *      Stores a new ITR value based on packets and byte
2821  *      counts during the last interrupt.  The advantage of per interrupt
2822  *      computation is faster updates and more accurate ITR for the current
2823  *      traffic pattern.  Constants in this function were computed
2824  *      based on theoretical maximum wire speed and thresholds were set based
2825  *      on testing data as well as attempting to minimize response time
2826  *      while increasing bulk throughput.
2827  *      this functionality is controlled by the InterruptThrottleRate module
2828  *      parameter (see e1000_param.c)
2829  * @adapter: pointer to adapter
2830  * @itr_setting: current adapter->itr
2831  * @packets: the number of packets during this measurement interval
2832  * @bytes: the number of bytes during this measurement interval
2833  **/
2834 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2835                                    uint16_t itr_setting,
2836                                    int packets,
2837                                    int bytes)
2838 {
2839         unsigned int retval = itr_setting;
2840         struct e1000_hw *hw = &adapter->hw;
2841
2842         if (unlikely(hw->mac_type < e1000_82540))
2843                 goto update_itr_done;
2844
2845         if (packets == 0)
2846                 goto update_itr_done;
2847
2848         switch (itr_setting) {
2849         case lowest_latency:
2850                 /* jumbo frames get bulk treatment*/
2851                 if (bytes/packets > 8000)
2852                         retval = bulk_latency;
2853                 else if ((packets < 5) && (bytes > 512))
2854                         retval = low_latency;
2855                 break;
2856         case low_latency:  /* 50 usec aka 20000 ints/s */
2857                 if (bytes > 10000) {
2858                         /* jumbo frames need bulk latency setting */
2859                         if (bytes/packets > 8000)
2860                                 retval = bulk_latency;
2861                         else if ((packets < 10) || ((bytes/packets) > 1200))
2862                                 retval = bulk_latency;
2863                         else if ((packets > 35))
2864                                 retval = lowest_latency;
2865                 } else if (bytes/packets > 2000)
2866                         retval = bulk_latency;
2867                 else if (packets <= 2 && bytes < 512)
2868                         retval = lowest_latency;
2869                 break;
2870         case bulk_latency: /* 250 usec aka 4000 ints/s */
2871                 if (bytes > 25000) {
2872                         if (packets > 35)
2873                                 retval = low_latency;
2874                 } else if (bytes < 6000) {
2875                         retval = low_latency;
2876                 }
2877                 break;
2878         }
2879
2880 update_itr_done:
2881         return retval;
2882 }
2883
2884 static void e1000_set_itr(struct e1000_adapter *adapter)
2885 {
2886         struct e1000_hw *hw = &adapter->hw;
2887         uint16_t current_itr;
2888         uint32_t new_itr = adapter->itr;
2889
2890         if (unlikely(hw->mac_type < e1000_82540))
2891                 return;
2892
2893         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2894         if (unlikely(adapter->link_speed != SPEED_1000)) {
2895                 current_itr = 0;
2896                 new_itr = 4000;
2897                 goto set_itr_now;
2898         }
2899
2900         adapter->tx_itr = e1000_update_itr(adapter,
2901                                     adapter->tx_itr,
2902                                     adapter->total_tx_packets,
2903                                     adapter->total_tx_bytes);
2904         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2905         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2906                 adapter->tx_itr = low_latency;
2907
2908         adapter->rx_itr = e1000_update_itr(adapter,
2909                                     adapter->rx_itr,
2910                                     adapter->total_rx_packets,
2911                                     adapter->total_rx_bytes);
2912         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2913         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2914                 adapter->rx_itr = low_latency;
2915
2916         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2917
2918         switch (current_itr) {
2919         /* counts and packets in update_itr are dependent on these numbers */
2920         case lowest_latency:
2921                 new_itr = 70000;
2922                 break;
2923         case low_latency:
2924                 new_itr = 20000; /* aka hwitr = ~200 */
2925                 break;
2926         case bulk_latency:
2927                 new_itr = 4000;
2928                 break;
2929         default:
2930                 break;
2931         }
2932
2933 set_itr_now:
2934         if (new_itr != adapter->itr) {
2935                 /* this attempts to bias the interrupt rate towards Bulk
2936                  * by adding intermediate steps when interrupt rate is
2937                  * increasing */
2938                 new_itr = new_itr > adapter->itr ?
2939                              min(adapter->itr + (new_itr >> 2), new_itr) :
2940                              new_itr;
2941                 adapter->itr = new_itr;
2942                 E1000_WRITE_REG(hw, ITR, 1000000000 / (new_itr * 256));
2943         }
2944
2945         return;
2946 }
2947
2948 #define E1000_TX_FLAGS_CSUM             0x00000001
2949 #define E1000_TX_FLAGS_VLAN             0x00000002
2950 #define E1000_TX_FLAGS_TSO              0x00000004
2951 #define E1000_TX_FLAGS_IPV4             0x00000008
2952 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2953 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2954
2955 static int
2956 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2957           struct sk_buff *skb)
2958 {
2959         struct e1000_context_desc *context_desc;
2960         struct e1000_buffer *buffer_info;
2961         unsigned int i;
2962         uint32_t cmd_length = 0;
2963         uint16_t ipcse = 0, tucse, mss;
2964         uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2965         int err;
2966
2967         if (skb_is_gso(skb)) {
2968                 if (skb_header_cloned(skb)) {
2969                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2970                         if (err)
2971                                 return err;
2972                 }
2973
2974                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2975                 mss = skb_shinfo(skb)->gso_size;
2976                 if (skb->protocol == htons(ETH_P_IP)) {
2977                         struct iphdr *iph = ip_hdr(skb);
2978                         iph->tot_len = 0;
2979                         iph->check = 0;
2980                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2981                                                                  iph->daddr, 0,
2982                                                                  IPPROTO_TCP,
2983                                                                  0);
2984                         cmd_length = E1000_TXD_CMD_IP;
2985                         ipcse = skb_transport_offset(skb) - 1;
2986                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2987                         ipv6_hdr(skb)->payload_len = 0;
2988                         tcp_hdr(skb)->check =
2989                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2990                                                  &ipv6_hdr(skb)->daddr,
2991                                                  0, IPPROTO_TCP, 0);
2992                         ipcse = 0;
2993                 }
2994                 ipcss = skb_network_offset(skb);
2995                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2996                 tucss = skb_transport_offset(skb);
2997                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2998                 tucse = 0;
2999
3000                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3001                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3002
3003                 i = tx_ring->next_to_use;
3004                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3005                 buffer_info = &tx_ring->buffer_info[i];
3006
3007                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3008                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3009                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3010                 context_desc->upper_setup.tcp_fields.tucss = tucss;
3011                 context_desc->upper_setup.tcp_fields.tucso = tucso;
3012                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3013                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3014                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3015                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3016
3017                 buffer_info->time_stamp = jiffies;
3018                 buffer_info->next_to_watch = i;
3019
3020                 if (++i == tx_ring->count) i = 0;
3021                 tx_ring->next_to_use = i;
3022
3023                 return true;
3024         }
3025         return false;
3026 }
3027
3028 static bool
3029 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3030               struct sk_buff *skb)
3031 {
3032         struct e1000_context_desc *context_desc;
3033         struct e1000_buffer *buffer_info;
3034         unsigned int i;
3035         uint8_t css;
3036
3037         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
3038                 css = skb_transport_offset(skb);
3039
3040                 i = tx_ring->next_to_use;
3041                 buffer_info = &tx_ring->buffer_info[i];
3042                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3043
3044                 context_desc->lower_setup.ip_config = 0;
3045                 context_desc->upper_setup.tcp_fields.tucss = css;
3046                 context_desc->upper_setup.tcp_fields.tucso =
3047                         css + skb->csum_offset;
3048                 context_desc->upper_setup.tcp_fields.tucse = 0;
3049                 context_desc->tcp_seg_setup.data = 0;
3050                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
3051
3052                 buffer_info->time_stamp = jiffies;
3053                 buffer_info->next_to_watch = i;
3054
3055                 if (unlikely(++i == tx_ring->count)) i = 0;
3056                 tx_ring->next_to_use = i;
3057
3058                 return true;
3059         }
3060
3061         return false;
3062 }
3063
3064 #define E1000_MAX_TXD_PWR       12
3065 #define E1000_MAX_DATA_PER_TXD  (1<<E1000_MAX_TXD_PWR)
3066
3067 static int
3068 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3069              struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
3070              unsigned int nr_frags, unsigned int mss)
3071 {
3072         struct e1000_buffer *buffer_info;
3073         unsigned int len = skb->len;
3074         unsigned int offset = 0, size, count = 0, i;
3075         unsigned int f;
3076         len -= skb->data_len;
3077
3078         i = tx_ring->next_to_use;
3079
3080         while (len) {
3081                 buffer_info = &tx_ring->buffer_info[i];
3082                 size = min(len, max_per_txd);
3083                 /* Workaround for Controller erratum --
3084                  * descriptor for non-tso packet in a linear SKB that follows a
3085                  * tso gets written back prematurely before the data is fully
3086                  * DMA'd to the controller */
3087                 if (!skb->data_len && tx_ring->last_tx_tso &&
3088                     !skb_is_gso(skb)) {
3089                         tx_ring->last_tx_tso = 0;
3090                         size -= 4;
3091                 }
3092
3093                 /* Workaround for premature desc write-backs
3094                  * in TSO mode.  Append 4-byte sentinel desc */
3095                 if (unlikely(mss && !nr_frags && size == len && size > 8))
3096                         size -= 4;
3097                 /* work-around for errata 10 and it applies
3098                  * to all controllers in PCI-X mode
3099                  * The fix is to make sure that the first descriptor of a
3100                  * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
3101                  */
3102                 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3103                                 (size > 2015) && count == 0))
3104                         size = 2015;
3105
3106                 /* Workaround for potential 82544 hang in PCI-X.  Avoid
3107                  * terminating buffers within evenly-aligned dwords. */
3108                 if (unlikely(adapter->pcix_82544 &&
3109                    !((unsigned long)(skb->data + offset + size - 1) & 4) &&
3110                    size > 4))
3111                         size -= 4;
3112
3113                 buffer_info->length = size;
3114                 buffer_info->dma =
3115                         pci_map_single(adapter->pdev,
3116                                 skb->data + offset,
3117                                 size,
3118                                 PCI_DMA_TODEVICE);
3119                 buffer_info->time_stamp = jiffies;
3120                 buffer_info->next_to_watch = i;
3121
3122                 len -= size;
3123                 offset += size;
3124                 count++;
3125                 if (unlikely(++i == tx_ring->count)) i = 0;
3126         }
3127
3128         for (f = 0; f < nr_frags; f++) {
3129                 struct skb_frag_struct *frag;
3130
3131                 frag = &skb_shinfo(skb)->frags[f];
3132                 len = frag->size;
3133                 offset = frag->page_offset;
3134
3135                 while (len) {
3136                         buffer_info = &tx_ring->buffer_info[i];
3137                         size = min(len, max_per_txd);
3138                         /* Workaround for premature desc write-backs
3139                          * in TSO mode.  Append 4-byte sentinel desc */
3140                         if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3141                                 size -= 4;
3142                         /* Workaround for potential 82544 hang in PCI-X.
3143                          * Avoid terminating buffers within evenly-aligned
3144                          * dwords. */
3145                         if (unlikely(adapter->pcix_82544 &&
3146                            !((unsigned long)(frag->page+offset+size-1) & 4) &&
3147                            size > 4))
3148                                 size -= 4;
3149
3150                         buffer_info->length = size;
3151                         buffer_info->dma =
3152                                 pci_map_page(adapter->pdev,
3153                                         frag->page,
3154                                         offset,
3155                                         size,
3156                                         PCI_DMA_TODEVICE);
3157                         buffer_info->time_stamp = jiffies;
3158                         buffer_info->next_to_watch = i;
3159
3160                         len -= size;
3161                         offset += size;
3162                         count++;
3163                         if (unlikely(++i == tx_ring->count)) i = 0;
3164                 }
3165         }
3166
3167         i = (i == 0) ? tx_ring->count - 1 : i - 1;
3168         tx_ring->buffer_info[i].skb = skb;
3169         tx_ring->buffer_info[first].next_to_watch = i;
3170
3171         return count;
3172 }
3173
3174 static void
3175 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
3176                int tx_flags, int count)
3177 {
3178         struct e1000_tx_desc *tx_desc = NULL;
3179         struct e1000_buffer *buffer_info;
3180         uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3181         unsigned int i;
3182
3183         if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3184                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3185                              E1000_TXD_CMD_TSE;
3186                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3187
3188                 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3189                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3190         }
3191
3192         if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3193                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3194                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3195         }
3196
3197         if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3198                 txd_lower |= E1000_TXD_CMD_VLE;
3199                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3200         }
3201
3202         i = tx_ring->next_to_use;
3203
3204         while (count--) {
3205                 buffer_info = &tx_ring->buffer_info[i];
3206                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3207                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3208                 tx_desc->lower.data =
3209                         cpu_to_le32(txd_lower | buffer_info->length);
3210                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3211                 if (unlikely(++i == tx_ring->count)) i = 0;
3212         }
3213
3214         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3215
3216         /* Force memory writes to complete before letting h/w
3217          * know there are new descriptors to fetch.  (Only
3218          * applicable for weak-ordered memory model archs,
3219          * such as IA-64). */
3220         wmb();
3221
3222         tx_ring->next_to_use = i;
3223         writel(i, adapter->hw.hw_addr + tx_ring->tdt);
3224         /* we need this if more than one processor can write to our tail
3225          * at a time, it syncronizes IO on IA64/Altix systems */
3226         mmiowb();
3227 }
3228
3229 /**
3230  * 82547 workaround to avoid controller hang in half-duplex environment.
3231  * The workaround is to avoid queuing a large packet that would span
3232  * the internal Tx FIFO ring boundary by notifying the stack to resend
3233  * the packet at a later time.  This gives the Tx FIFO an opportunity to
3234  * flush all packets.  When that occurs, we reset the Tx FIFO pointers
3235  * to the beginning of the Tx FIFO.
3236  **/
3237
3238 #define E1000_FIFO_HDR                  0x10
3239 #define E1000_82547_PAD_LEN             0x3E0
3240
3241 static int
3242 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
3243 {
3244         uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3245         uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
3246
3247         skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3248
3249         if (adapter->link_duplex != HALF_DUPLEX)
3250                 goto no_fifo_stall_required;
3251
3252         if (atomic_read(&adapter->tx_fifo_stall))
3253                 return 1;
3254
3255         if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3256                 atomic_set(&adapter->tx_fifo_stall, 1);
3257                 return 1;
3258         }
3259
3260 no_fifo_stall_required:
3261         adapter->tx_fifo_head += skb_fifo_len;
3262         if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3263                 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3264         return 0;
3265 }
3266
3267 #define MINIMUM_DHCP_PACKET_SIZE 282
3268 static int
3269 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
3270 {
3271         struct e1000_hw *hw =  &adapter->hw;
3272         uint16_t length, offset;
3273         if (vlan_tx_tag_present(skb)) {
3274                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
3275                         ( adapter->hw.mng_cookie.status &
3276                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3277                         return 0;
3278         }
3279         if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3280                 struct ethhdr *eth = (struct ethhdr *) skb->data;
3281                 if ((htons(ETH_P_IP) == eth->h_proto)) {
3282                         const struct iphdr *ip =
3283                                 (struct iphdr *)((uint8_t *)skb->data+14);
3284                         if (IPPROTO_UDP == ip->protocol) {
3285                                 struct udphdr *udp =
3286                                         (struct udphdr *)((uint8_t *)ip +
3287                                                 (ip->ihl << 2));
3288                                 if (ntohs(udp->dest) == 67) {
3289                                         offset = (uint8_t *)udp + 8 - skb->data;
3290                                         length = skb->len - offset;
3291
3292                                         return e1000_mng_write_dhcp_info(hw,
3293                                                         (uint8_t *)udp + 8,
3294                                                         length);
3295                                 }
3296                         }
3297                 }
3298         }
3299         return 0;
3300 }
3301
3302 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3303 {
3304         struct e1000_adapter *adapter = netdev_priv(netdev);
3305         struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3306
3307         netif_stop_queue(netdev);
3308         /* Herbert's original patch had:
3309          *  smp_mb__after_netif_stop_queue();
3310          * but since that doesn't exist yet, just open code it. */
3311         smp_mb();
3312
3313         /* We need to check again in a case another CPU has just
3314          * made room available. */
3315         if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3316                 return -EBUSY;
3317
3318         /* A reprieve! */
3319         netif_start_queue(netdev);
3320         ++adapter->restart_queue;
3321         return 0;
3322 }
3323
3324 static int e1000_maybe_stop_tx(struct net_device *netdev,
3325                                struct e1000_tx_ring *tx_ring, int size)
3326 {
3327         if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3328                 return 0;
3329         return __e1000_maybe_stop_tx(netdev, size);
3330 }
3331
3332 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3333 static int
3334 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3335 {
3336         struct e1000_adapter *adapter = netdev_priv(netdev);
3337         struct e1000_tx_ring *tx_ring;
3338         unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3339         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3340         unsigned int tx_flags = 0;
3341         unsigned int len = skb->len - skb->data_len;
3342         unsigned long flags;
3343         unsigned int nr_frags;
3344         unsigned int mss;
3345         int count = 0;
3346         int tso;
3347         unsigned int f;
3348
3349         /* This goes back to the question of how to logically map a tx queue
3350          * to a flow.  Right now, performance is impacted slightly negatively
3351          * if using multiple tx queues.  If the stack breaks away from a
3352          * single qdisc implementation, we can look at this again. */
3353         tx_ring = adapter->tx_ring;
3354
3355         if (unlikely(skb->len <= 0)) {
3356                 dev_kfree_skb_any(skb);
3357                 return NETDEV_TX_OK;
3358         }
3359
3360         /* 82571 and newer doesn't need the workaround that limited descriptor
3361          * length to 4kB */
3362         if (adapter->hw.mac_type >= e1000_82571)
3363                 max_per_txd = 8192;
3364
3365         mss = skb_shinfo(skb)->gso_size;
3366         /* The controller does a simple calculation to
3367          * make sure there is enough room in the FIFO before
3368          * initiating the DMA for each buffer.  The calc is:
3369          * 4 = ceil(buffer len/mss).  To make sure we don't
3370          * overrun the FIFO, adjust the max buffer len if mss
3371          * drops. */
3372         if (mss) {
3373                 uint8_t hdr_len;
3374                 max_per_txd = min(mss << 2, max_per_txd);
3375                 max_txd_pwr = fls(max_per_txd) - 1;
3376
3377                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3378                 * points to just header, pull a few bytes of payload from
3379                 * frags into skb->data */
3380                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3381                 if (skb->data_len && hdr_len == len) {
3382                         switch (adapter->hw.mac_type) {
3383                                 unsigned int pull_size;
3384                         case e1000_82544:
3385                                 /* Make sure we have room to chop off 4 bytes,
3386                                  * and that the end alignment will work out to
3387                                  * this hardware's requirements
3388                                  * NOTE: this is a TSO only workaround
3389                                  * if end byte alignment not correct move us
3390                                  * into the next dword */
3391                                 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3392                                         break;
3393                                 /* fall through */
3394                         case e1000_82571:
3395                         case e1000_82572:
3396                         case e1000_82573:
3397                         case e1000_ich8lan:
3398                                 pull_size = min((unsigned int)4, skb->data_len);
3399                                 if (!__pskb_pull_tail(skb, pull_size)) {
3400                                         DPRINTK(DRV, ERR,
3401                                                 "__pskb_pull_tail failed.\n");
3402                                         dev_kfree_skb_any(skb);
3403                                         return NETDEV_TX_OK;
3404                                 }
3405                                 len = skb->len - skb->data_len;
3406                                 break;
3407                         default:
3408                                 /* do nothing */
3409                                 break;
3410                         }
3411                 }
3412         }
3413
3414         /* reserve a descriptor for the offload context */
3415         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3416                 count++;
3417         count++;
3418
3419         /* Controller Erratum workaround */
3420         if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3421                 count++;
3422
3423         count += TXD_USE_COUNT(len, max_txd_pwr);
3424
3425         if (adapter->pcix_82544)
3426                 count++;
3427
3428         /* work-around for errata 10 and it applies to all controllers
3429          * in PCI-X mode, so add one more descriptor to the count
3430          */
3431         if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
3432                         (len > 2015)))
3433                 count++;
3434
3435         nr_frags = skb_shinfo(skb)->nr_frags;
3436         for (f = 0; f < nr_frags; f++)
3437                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3438                                        max_txd_pwr);
3439         if (adapter->pcix_82544)
3440                 count += nr_frags;
3441
3442
3443         if (adapter->hw.tx_pkt_filtering &&
3444             (adapter->hw.mac_type == e1000_82573))
3445                 e1000_transfer_dhcp_info(adapter, skb);
3446
3447         if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3448                 /* Collision - tell upper layer to requeue */
3449                 return NETDEV_TX_LOCKED;
3450
3451         /* need: count + 2 desc gap to keep tail from touching
3452          * head, otherwise try next time */
3453         if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3454                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3455                 return NETDEV_TX_BUSY;
3456         }
3457
3458         if (unlikely(adapter->hw.mac_type == e1000_82547)) {
3459                 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3460                         netif_stop_queue(netdev);
3461                         mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3462                         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3463                         return NETDEV_TX_BUSY;
3464                 }
3465         }
3466
3467         if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3468                 tx_flags |= E1000_TX_FLAGS_VLAN;
3469                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3470         }
3471
3472         first = tx_ring->next_to_use;
3473
3474         tso = e1000_tso(adapter, tx_ring, skb);
3475         if (tso < 0) {
3476                 dev_kfree_skb_any(skb);
3477                 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3478                 return NETDEV_TX_OK;
3479         }
3480
3481         if (likely(tso)) {
3482                 tx_ring->last_tx_tso = 1;
3483                 tx_flags |= E1000_TX_FLAGS_TSO;
3484         } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3485                 tx_flags |= E1000_TX_FLAGS_CSUM;
3486
3487         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3488          * 82571 hardware supports TSO capabilities for IPv6 as well...
3489          * no longer assume, we must. */
3490         if (likely(skb->protocol == htons(ETH_P_IP)))
3491                 tx_flags |= E1000_TX_FLAGS_IPV4;
3492
3493         e1000_tx_queue(adapter, tx_ring, tx_flags,
3494                        e1000_tx_map(adapter, tx_ring, skb, first,
3495                                     max_per_txd, nr_frags, mss));
3496
3497         netdev->trans_start = jiffies;
3498
3499         /* Make sure there is space in the ring for the next send. */
3500         e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3501
3502         spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3503         return NETDEV_TX_OK;
3504 }
3505
3506 /**
3507  * e1000_tx_timeout - Respond to a Tx Hang
3508  * @netdev: network interface device structure
3509  **/
3510
3511 static void
3512 e1000_tx_timeout(struct net_device *netdev)
3513 {
3514         struct e1000_adapter *adapter = netdev_priv(netdev);
3515
3516         /* Do the reset outside of interrupt context */
3517         adapter->tx_timeout_count++;
3518         schedule_work(&adapter->reset_task);
3519 }
3520
3521 static void
3522 e1000_reset_task(struct work_struct *work)
3523 {
3524         struct e1000_adapter *adapter =
3525                 container_of(work, struct e1000_adapter, reset_task);
3526
3527         e1000_reinit_locked(adapter);
3528 }
3529
3530 /**
3531  * e1000_get_stats - Get System Network Statistics
3532  * @netdev: network interface device structure
3533  *
3534  * Returns the address of the device statistics structure.
3535  * The statistics are actually updated from the timer callback.
3536  **/
3537
3538 static struct net_device_stats *
3539 e1000_get_stats(struct net_device *netdev)
3540 {
3541         struct e1000_adapter *adapter = netdev_priv(netdev);
3542
3543         /* only return the current stats */
3544         return &adapter->net_stats;
3545 }
3546
3547 /**
3548  * e1000_change_mtu - Change the Maximum Transfer Unit
3549  * @netdev: network interface device structure
3550  * @new_mtu: new value for maximum frame size
3551  *
3552  * Returns 0 on success, negative on failure
3553  **/
3554
3555 static int
3556 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3557 {
3558         struct e1000_adapter *adapter = netdev_priv(netdev);
3559         int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3560         uint16_t eeprom_data = 0;
3561
3562         if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3563             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3564                 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3565                 return -EINVAL;
3566         }
3567
3568         /* Adapter-specific max frame size limits. */
3569         switch (adapter->hw.mac_type) {
3570         case e1000_undefined ... e1000_82542_rev2_1:
3571         case e1000_ich8lan:
3572                 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3573                         DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3574                         return -EINVAL;
3575                 }
3576                 break;
3577         case e1000_82573:
3578                 /* Jumbo Frames not supported if:
3579                  * - this is not an 82573L device
3580                  * - ASPM is enabled in any way (0x1A bits 3:2) */
3581                 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3582                                   &eeprom_data);
3583                 if ((adapter->hw.device_id != E1000_DEV_ID_82573L) ||
3584                     (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3585                         if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3586                                 DPRINTK(PROBE, ERR,
3587                                         "Jumbo Frames not supported.\n");
3588                                 return -EINVAL;
3589                         }
3590                         break;
3591                 }
3592                 /* ERT will be enabled later to enable wire speed receives */
3593
3594                 /* fall through to get support */
3595         case e1000_82571:
3596         case e1000_82572:
3597         case e1000_80003es2lan:
3598 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3599                 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3600                         DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3601                         return -EINVAL;
3602                 }
3603                 break;
3604         default:
3605                 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3606                 break;
3607         }
3608
3609         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3610          * means we reserve 2 more, this pushes us to allocate from the next
3611          * larger slab size
3612          * i.e. RXBUFFER_2048 --> size-4096 slab */
3613
3614         if (max_frame <= E1000_RXBUFFER_256)
3615                 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3616         else if (max_frame <= E1000_RXBUFFER_512)
3617                 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3618         else if (max_frame <= E1000_RXBUFFER_1024)
3619                 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3620         else if (max_frame <= E1000_RXBUFFER_2048)
3621                 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3622         else if (max_frame <= E1000_RXBUFFER_4096)
3623                 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3624         else if (max_frame <= E1000_RXBUFFER_8192)
3625                 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3626         else if (max_frame <= E1000_RXBUFFER_16384)
3627                 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3628
3629         /* adjust allocation if LPE protects us, and we aren't using SBP */
3630         if (!adapter->hw.tbi_compatibility_on &&
3631             ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3632              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3633                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3634
3635         netdev->mtu = new_mtu;
3636         adapter->hw.max_frame_size = max_frame;
3637
3638         if (netif_running(netdev))
3639                 e1000_reinit_locked(adapter);
3640
3641         return 0;
3642 }
3643
3644 /**
3645  * e1000_update_stats - Update the board statistics counters
3646  * @adapter: board private structure
3647  **/
3648
3649 void
3650 e1000_update_stats(struct e1000_adapter *adapter)
3651 {
3652         struct e1000_hw *hw = &adapter->hw;
3653         struct pci_dev *pdev = adapter->pdev;
3654         unsigned long flags;
3655         uint16_t phy_tmp;
3656
3657 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3658
3659         /*
3660          * Prevent stats update while adapter is being reset, or if the pci
3661          * connection is down.
3662          */
3663         if (adapter->link_speed == 0)
3664                 return;
3665         if (pci_channel_offline(pdev))
3666                 return;
3667
3668         spin_lock_irqsave(&adapter->stats_lock, flags);
3669
3670         /* these counters are modified from e1000_tbi_adjust_stats,
3671          * called from the interrupt context, so they must only
3672          * be written while holding adapter->stats_lock
3673          */
3674
3675         adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3676         adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3677         adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3678         adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3679         adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3680         adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3681         adapter->stats.roc += E1000_READ_REG(hw, ROC);
3682
3683         if (adapter->hw.mac_type != e1000_ich8lan) {
3684                 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3685                 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3686                 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3687                 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3688                 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3689                 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3690         }
3691
3692         adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3693         adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3694         adapter->stats.scc += E1000_READ_REG(hw, SCC);
3695         adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3696         adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3697         adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3698         adapter->stats.dc += E1000_READ_REG(hw, DC);
3699         adapter->stats.sec += E1000_READ_REG(hw, SEC);
3700         adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3701         adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3702         adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3703         adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3704         adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3705         adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3706         adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3707         adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3708         adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3709         adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3710         adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3711         adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3712         adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3713         adapter->stats.torl += E1000_READ_REG(hw, TORL);
3714         adapter->stats.torh += E1000_READ_REG(hw, TORH);
3715         adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3716         adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3717         adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3718
3719         if (adapter->hw.mac_type != e1000_ich8lan) {
3720                 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3721                 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3722                 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3723                 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3724                 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3725                 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3726         }
3727
3728         adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3729         adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3730
3731         /* used for adaptive IFS */
3732
3733         hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3734         adapter->stats.tpt += hw->tx_packet_delta;
3735         hw->collision_delta = E1000_READ_REG(hw, COLC);
3736         adapter->stats.colc += hw->collision_delta;
3737
3738         if (hw->mac_type >= e1000_82543) {
3739                 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3740                 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3741                 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3742                 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3743                 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3744                 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3745         }
3746         if (hw->mac_type > e1000_82547_rev_2) {
3747                 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3748                 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3749
3750                 if (adapter->hw.mac_type != e1000_ich8lan) {
3751                         adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3752                         adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3753                         adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3754                         adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3755                         adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3756                         adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3757                         adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3758                 }
3759         }
3760
3761         /* Fill out the OS statistics structure */
3762         adapter->net_stats.multicast = adapter->stats.mprc;
3763         adapter->net_stats.collisions = adapter->stats.colc;
3764
3765         /* Rx Errors */
3766
3767         /* RLEC on some newer hardware can be incorrect so build
3768         * our own version based on RUC and ROC */
3769         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3770                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3771                 adapter->stats.ruc + adapter->stats.roc +
3772                 adapter->stats.cexterr;
3773         adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3774         adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3775         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3776         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3777         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3778
3779         /* Tx Errors */
3780         adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3781         adapter->net_stats.tx_errors = adapter->stats.txerrc;
3782         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3783         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3784         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3785         if (adapter->hw.bad_tx_carr_stats_fd &&
3786             adapter->link_duplex == FULL_DUPLEX) {
3787                 adapter->net_stats.tx_carrier_errors = 0;
3788                 adapter->stats.tncrs = 0;
3789         }
3790
3791         /* Tx Dropped needs to be maintained elsewhere */
3792
3793         /* Phy Stats */
3794         if (hw->media_type == e1000_media_type_copper) {
3795                 if ((adapter->link_speed == SPEED_1000) &&
3796                    (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3797                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3798                         adapter->phy_stats.idle_errors += phy_tmp;
3799                 }
3800
3801                 if ((hw->mac_type <= e1000_82546) &&
3802                    (hw->phy_type == e1000_phy_m88) &&
3803                    !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3804                         adapter->phy_stats.receive_errors += phy_tmp;
3805         }
3806
3807         /* Management Stats */
3808         if (adapter->hw.has_smbus) {
3809                 adapter->stats.mgptc += E1000_READ_REG(hw, MGTPTC);
3810                 adapter->stats.mgprc += E1000_READ_REG(hw, MGTPRC);
3811                 adapter->stats.mgpdc += E1000_READ_REG(hw, MGTPDC);
3812         }
3813
3814         spin_unlock_irqrestore(&adapter->stats_lock, flags);
3815 }
3816
3817 /**
3818  * e1000_intr_msi - Interrupt Handler
3819  * @irq: interrupt number
3820  * @data: pointer to a network interface device structure
3821  **/
3822
3823 static irqreturn_t
3824 e1000_intr_msi(int irq, void *data)
3825 {
3826         struct net_device *netdev = data;
3827         struct e1000_adapter *adapter = netdev_priv(netdev);
3828         struct e1000_hw *hw = &adapter->hw;
3829 #ifndef CONFIG_E1000_NAPI
3830         int i;
3831 #endif
3832         uint32_t icr = E1000_READ_REG(hw, ICR);
3833
3834         /* in NAPI mode read ICR disables interrupts using IAM */
3835
3836         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3837                 hw->get_link_status = 1;
3838                 /* 80003ES2LAN workaround-- For packet buffer work-around on
3839                  * link down event; disable receives here in the ISR and reset
3840                  * adapter in watchdog */
3841                 if (netif_carrier_ok(netdev) &&
3842                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3843                         /* disable receives */
3844                         uint32_t rctl = E1000_READ_REG(hw, RCTL);
3845                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3846                 }
3847                 /* guard against interrupt when we're going down */
3848                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3849                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3850         }
3851
3852 #ifdef CONFIG_E1000_NAPI
3853         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3854                 adapter->total_tx_bytes = 0;
3855                 adapter->total_tx_packets = 0;
3856                 adapter->total_rx_bytes = 0;
3857                 adapter->total_rx_packets = 0;
3858                 __netif_rx_schedule(netdev, &adapter->napi);
3859         } else
3860                 e1000_irq_enable(adapter);
3861 #else
3862         adapter->total_tx_bytes = 0;
3863         adapter->total_rx_bytes = 0;
3864         adapter->total_tx_packets = 0;
3865         adapter->total_rx_packets = 0;
3866
3867         for (i = 0; i < E1000_MAX_INTR; i++)
3868                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3869                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3870                         break;
3871
3872         if (likely(adapter->itr_setting & 3))
3873                 e1000_set_itr(adapter);
3874 #endif
3875
3876         return IRQ_HANDLED;
3877 }
3878
3879 /**
3880  * e1000_intr - Interrupt Handler
3881  * @irq: interrupt number
3882  * @data: pointer to a network interface device structure
3883  **/
3884
3885 static irqreturn_t
3886 e1000_intr(int irq, void *data)
3887 {
3888         struct net_device *netdev = data;
3889         struct e1000_adapter *adapter = netdev_priv(netdev);
3890         struct e1000_hw *hw = &adapter->hw;
3891         uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3892 #ifndef CONFIG_E1000_NAPI
3893         int i;
3894 #endif
3895         if (unlikely(!icr))
3896                 return IRQ_NONE;  /* Not our interrupt */
3897
3898 #ifdef CONFIG_E1000_NAPI
3899         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3900          * not set, then the adapter didn't send an interrupt */
3901         if (unlikely(hw->mac_type >= e1000_82571 &&
3902                      !(icr & E1000_ICR_INT_ASSERTED)))
3903                 return IRQ_NONE;
3904
3905         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3906          * need for the IMC write */
3907 #endif
3908
3909         if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3910                 hw->get_link_status = 1;
3911                 /* 80003ES2LAN workaround--
3912                  * For packet buffer work-around on link down event;
3913                  * disable receives here in the ISR and
3914                  * reset adapter in watchdog
3915                  */
3916                 if (netif_carrier_ok(netdev) &&
3917                     (adapter->hw.mac_type == e1000_80003es2lan)) {
3918                         /* disable receives */
3919                         rctl = E1000_READ_REG(hw, RCTL);
3920                         E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3921                 }
3922                 /* guard against interrupt when we're going down */
3923                 if (!test_bit(__E1000_DOWN, &adapter->flags))
3924                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3925         }
3926
3927 #ifdef CONFIG_E1000_NAPI
3928         if (unlikely(hw->mac_type < e1000_82571)) {
3929                 /* disable interrupts, without the synchronize_irq bit */
3930                 E1000_WRITE_REG(hw, IMC, ~0);
3931                 E1000_WRITE_FLUSH(hw);
3932         }
3933         if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3934                 adapter->total_tx_bytes = 0;
3935                 adapter->total_tx_packets = 0;
3936                 adapter->total_rx_bytes = 0;
3937                 adapter->total_rx_packets = 0;
3938                 __netif_rx_schedule(netdev, &adapter->napi);
3939         } else
3940                 /* this really should not happen! if it does it is basically a
3941                  * bug, but not a hard error, so enable ints and continue */
3942                 e1000_irq_enable(adapter);
3943 #else
3944         /* Writing IMC and IMS is needed for 82547.
3945          * Due to Hub Link bus being occupied, an interrupt
3946          * de-assertion message is not able to be sent.
3947          * When an interrupt assertion message is generated later,
3948          * two messages are re-ordered and sent out.
3949          * That causes APIC to think 82547 is in de-assertion
3950          * state, while 82547 is in assertion state, resulting
3951          * in dead lock. Writing IMC forces 82547 into
3952          * de-assertion state.
3953          */
3954         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3955                 E1000_WRITE_REG(hw, IMC, ~0);
3956
3957         adapter->total_tx_bytes = 0;
3958         adapter->total_rx_bytes = 0;
3959         adapter->total_tx_packets = 0;
3960         adapter->total_rx_packets = 0;
3961
3962         for (i = 0; i < E1000_MAX_INTR; i++)
3963                 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3964                    !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3965                         break;
3966
3967         if (likely(adapter->itr_setting & 3))
3968                 e1000_set_itr(adapter);
3969
3970         if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3971                 e1000_irq_enable(adapter);
3972
3973 #endif
3974         return IRQ_HANDLED;
3975 }
3976
3977 #ifdef CONFIG_E1000_NAPI
3978 /**
3979  * e1000_clean - NAPI Rx polling callback
3980  * @adapter: board private structure
3981  **/
3982
3983 static int
3984 e1000_clean(struct napi_struct *napi, int budget)
3985 {
3986         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3987         struct net_device *poll_dev = adapter->netdev;
3988         int tx_cleaned = 0, work_done = 0;
3989
3990         /* Must NOT use netdev_priv macro here. */
3991         adapter = poll_dev->priv;
3992
3993         /* e1000_clean is called per-cpu.  This lock protects
3994          * tx_ring[0] from being cleaned by multiple cpus
3995          * simultaneously.  A failure obtaining the lock means
3996          * tx_ring[0] is currently being cleaned anyway. */
3997         if (spin_trylock(&adapter->tx_queue_lock)) {
3998                 tx_cleaned = e1000_clean_tx_irq(adapter,
3999                                                 &adapter->tx_ring[0]);
4000                 spin_unlock(&adapter->tx_queue_lock);
4001         }
4002
4003         adapter->clean_rx(adapter, &adapter->rx_ring[0],
4004                           &work_done, budget);
4005
4006         if (tx_cleaned)
4007                 work_done = budget;
4008
4009         /* If budget not fully consumed, exit the polling mode */
4010         if (work_done < budget) {
4011                 if (likely(adapter->itr_setting & 3))
4012                         e1000_set_itr(adapter);
4013                 netif_rx_complete(poll_dev, napi);
4014                 e1000_irq_enable(adapter);
4015         }
4016
4017         return work_done;
4018 }
4019
4020 #endif
4021 /**
4022  * e1000_clean_tx_irq - Reclaim resources after transmit completes
4023  * @adapter: board private structure
4024  **/
4025
4026 static bool
4027 e1000_clean_tx_irq(struct e1000_adapter *adapter,
4028                    struct e1000_tx_ring *tx_ring)
4029 {
4030         struct net_device *netdev = adapter->netdev;
4031         struct e1000_tx_desc *tx_desc, *eop_desc;
4032         struct e1000_buffer *buffer_info;
4033         unsigned int i, eop;
4034 #ifdef CONFIG_E1000_NAPI
4035         unsigned int count = 0;
4036 #endif
4037         bool cleaned = false;
4038         unsigned int total_tx_bytes=0, total_tx_packets=0;
4039
4040         i = tx_ring->next_to_clean;
4041         eop = tx_ring->buffer_info[i].next_to_watch;
4042         eop_desc = E1000_TX_DESC(*tx_ring, eop);
4043
4044         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
4045                 for (cleaned = false; !cleaned; ) {
4046                         tx_desc = E1000_TX_DESC(*tx_ring, i);
4047                         buffer_info = &tx_ring->buffer_info[i];
4048                         cleaned = (i == eop);
4049
4050                         if (cleaned) {
4051                                 struct sk_buff *skb = buffer_info->skb;
4052                                 unsigned int segs, bytecount;
4053                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
4054                                 /* multiply data chunks by size of headers */
4055                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
4056                                             skb->len;
4057                                 total_tx_packets += segs;
4058                                 total_tx_bytes += bytecount;
4059                         }
4060                         e1000_unmap_and_free_tx_resource(adapter, buffer_info);
4061                         tx_desc->upper.data = 0;
4062
4063                         if (unlikely(++i == tx_ring->count)) i = 0;
4064                 }
4065
4066                 eop = tx_ring->buffer_info[i].next_to_watch;
4067                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
4068 #ifdef CONFIG_E1000_NAPI
4069 #define E1000_TX_WEIGHT 64
4070                 /* weight of a sort for tx, to avoid endless transmit cleanup */
4071                 if (count++ == E1000_TX_WEIGHT) break;
4072 #endif
4073         }
4074
4075         tx_ring->next_to_clean = i;
4076
4077 #define TX_WAKE_THRESHOLD 32
4078         if (unlikely(cleaned && netif_carrier_ok(netdev) &&
4079                      E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
4080                 /* Make sure that anybody stopping the queue after this
4081                  * sees the new next_to_clean.
4082                  */
4083                 smp_mb();
4084                 if (netif_queue_stopped(netdev)) {
4085                         netif_wake_queue(netdev);
4086                         ++adapter->restart_queue;
4087                 }
4088         }
4089
4090         if (adapter->detect_tx_hung) {
4091                 /* Detect a transmit hang in hardware, this serializes the
4092                  * check with the clearing of time_stamp and movement of i */
4093                 adapter->detect_tx_hung = false;
4094                 if (tx_ring->buffer_info[eop].dma &&
4095                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
4096                                (adapter->tx_timeout_factor * HZ))
4097                     && !(E1000_READ_REG(&adapter->hw, STATUS) &
4098                          E1000_STATUS_TXOFF)) {
4099
4100                         /* detected Tx unit hang */
4101                         DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
4102                                         "  Tx Queue             <%lu>\n"
4103                                         "  TDH                  <%x>\n"
4104                                         "  TDT                  <%x>\n"
4105                                         "  next_to_use          <%x>\n"
4106                                         "  next_to_clean        <%x>\n"
4107                                         "buffer_info[next_to_clean]\n"
4108                                         "  time_stamp           <%lx>\n"
4109                                         "  next_to_watch        <%x>\n"
4110                                         "  jiffies              <%lx>\n"
4111                                         "  next_to_watch.status <%x>\n",
4112                                 (unsigned long)((tx_ring - adapter->tx_ring) /
4113                                         sizeof(struct e1000_tx_ring)),
4114                                 readl(adapter->hw.hw_addr + tx_ring->tdh),
4115                                 readl(adapter->hw.hw_addr + tx_ring->tdt),
4116                                 tx_ring->next_to_use,
4117                                 tx_ring->next_to_clean,
4118                                 tx_ring->buffer_info[eop].time_stamp,
4119                                 eop,
4120                                 jiffies,
4121                                 eop_desc->upper.fields.status);
4122                         netif_stop_queue(netdev);
4123                 }
4124         }
4125         adapter->total_tx_bytes += total_tx_bytes;
4126         adapter->total_tx_packets += total_tx_packets;
4127         adapter->net_stats.tx_bytes += total_tx_bytes;
4128         adapter->net_stats.tx_packets += total_tx_packets;
4129         return cleaned;
4130 }
4131
4132 /**
4133  * e1000_rx_checksum - Receive Checksum Offload for 82543
4134  * @adapter:     board private structure
4135  * @status_err:  receive descriptor status and error fields
4136  * @csum:        receive descriptor csum field
4137  * @sk_buff:     socket buffer with received data
4138  **/
4139
4140 static void
4141 e1000_rx_checksum(struct e1000_adapter *adapter,
4142                   uint32_t status_err, uint32_t csum,
4143                   struct sk_buff *skb)
4144 {
4145         uint16_t status = (uint16_t)status_err;
4146         uint8_t errors = (uint8_t)(status_err >> 24);
4147         skb->ip_summed = CHECKSUM_NONE;
4148
4149         /* 82543 or newer only */
4150         if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
4151         /* Ignore Checksum bit is set */
4152         if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
4153         /* TCP/UDP checksum error bit is set */
4154         if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
4155                 /* let the stack verify checksum errors */
4156                 adapter->hw_csum_err++;
4157                 return;
4158         }
4159         /* TCP/UDP Checksum has not been calculated */
4160         if (adapter->hw.mac_type <= e1000_82547_rev_2) {
4161                 if (!(status & E1000_RXD_STAT_TCPCS))
4162                         return;
4163         } else {
4164                 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
4165                         return;
4166         }
4167         /* It must be a TCP or UDP packet with a valid checksum */
4168         if (likely(status & E1000_RXD_STAT_TCPCS)) {
4169                 /* TCP checksum is good */
4170                 skb->ip_summed = CHECKSUM_UNNECESSARY;
4171         } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
4172                 /* IP fragment with UDP payload */
4173                 /* Hardware complements the payload checksum, so we undo it
4174                  * and then put the value in host order for further stack use.
4175                  */
4176                 __sum16 sum = (__force __sum16)htons(csum);
4177                 skb->csum = csum_unfold(~sum);
4178                 skb->ip_summed = CHECKSUM_COMPLETE;
4179         }
4180         adapter->hw_csum_good++;
4181 }
4182
4183 /**
4184  * e1000_clean_rx_irq - Send received data up the network stack; legacy
4185  * @adapter: board private structure
4186  **/
4187
4188 static bool
4189 #ifdef CONFIG_E1000_NAPI
4190 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4191                    struct e1000_rx_ring *rx_ring,
4192                    int *work_done, int work_to_do)
4193 #else
4194 e1000_clean_rx_irq(struct e1000_adapter *adapter,
4195                    struct e1000_rx_ring *rx_ring)
4196 #endif
4197 {
4198         struct net_device *netdev = adapter->netdev;
4199         struct pci_dev *pdev = adapter->pdev;
4200         struct e1000_rx_desc *rx_desc, *next_rxd;
4201         struct e1000_buffer *buffer_info, *next_buffer;
4202         unsigned long flags;
4203         uint32_t length;
4204         uint8_t last_byte;
4205         unsigned int i;
4206         int cleaned_count = 0;
4207         bool cleaned = false;
4208         unsigned int total_rx_bytes=0, total_rx_packets=0;
4209
4210         i = rx_ring->next_to_clean;
4211         rx_desc = E1000_RX_DESC(*rx_ring, i);
4212         buffer_info = &rx_ring->buffer_info[i];
4213
4214         while (rx_desc->status & E1000_RXD_STAT_DD) {
4215                 struct sk_buff *skb;
4216                 u8 status;
4217
4218 #ifdef CONFIG_E1000_NAPI
4219                 if (*work_done >= work_to_do)
4220                         break;
4221                 (*work_done)++;
4222 #endif
4223                 status = rx_desc->status;
4224                 skb = buffer_info->skb;
4225                 buffer_info->skb = NULL;
4226
4227                 prefetch(skb->data - NET_IP_ALIGN);
4228
4229                 if (++i == rx_ring->count) i = 0;
4230                 next_rxd = E1000_RX_DESC(*rx_ring, i);
4231                 prefetch(next_rxd);
4232
4233                 next_buffer = &rx_ring->buffer_info[i];
4234
4235                 cleaned = true;
4236                 cleaned_count++;
4237                 pci_unmap_single(pdev,
4238                                  buffer_info->dma,
4239                                  buffer_info->length,
4240                                  PCI_DMA_FROMDEVICE);
4241
4242                 length = le16_to_cpu(rx_desc->length);
4243
4244                 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4245                         /* All receives must fit into a single buffer */
4246                         E1000_DBG("%s: Receive packet consumed multiple"
4247                                   " buffers\n", netdev->name);
4248                         /* recycle */
4249                         buffer_info->skb = skb;
4250                         goto next_desc;
4251                 }
4252
4253                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4254                         last_byte = *(skb->data + length - 1);
4255                         if (TBI_ACCEPT(&adapter->hw, status,
4256                                       rx_desc->errors, length, last_byte)) {
4257                                 spin_lock_irqsave(&adapter->stats_lock, flags);
4258                                 e1000_tbi_adjust_stats(&adapter->hw,
4259                                                        &adapter->stats,
4260                                                        length, skb->data);
4261                                 spin_unlock_irqrestore(&adapter->stats_lock,
4262                                                        flags);
4263                                 length--;
4264                         } else {
4265                                 /* recycle */
4266                                 buffer_info->skb = skb;
4267                                 goto next_desc;
4268                         }
4269                 }
4270
4271                 /* adjust length to remove Ethernet CRC, this must be
4272                  * done after the TBI_ACCEPT workaround above */
4273                 length -= 4;
4274
4275                 /* probably a little skewed due to removing CRC */
4276                 total_rx_bytes += length;
4277                 total_rx_packets++;
4278
4279                 /* code added for copybreak, this should improve
4280                  * performance for small packets with large amounts
4281                  * of reassembly being done in the stack */
4282                 if (length < copybreak) {
4283                         struct sk_buff *new_skb =
4284                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4285                         if (new_skb) {
4286                                 skb_reserve(new_skb, NET_IP_ALIGN);
4287                                 skb_copy_to_linear_data_offset(new_skb,
4288                                                                -NET_IP_ALIGN,
4289                                                                (skb->data -
4290                                                                 NET_IP_ALIGN),
4291                                                                (length +
4292                                                                 NET_IP_ALIGN));
4293                                 /* save the skb in buffer_info as good */
4294                                 buffer_info->skb = skb;
4295                                 skb = new_skb;
4296                         }
4297                         /* else just continue with the old one */
4298                 }
4299                 /* end copybreak code */
4300                 skb_put(skb, length);
4301
4302                 /* Receive Checksum Offload */
4303                 e1000_rx_checksum(adapter,
4304                                   (uint32_t)(status) |
4305                                   ((uint32_t)(rx_desc->errors) << 24),
4306                                   le16_to_cpu(rx_desc->csum), skb);
4307
4308                 skb->protocol = eth_type_trans(skb, netdev);
4309 #ifdef CONFIG_E1000_NAPI
4310                 if (unlikely(adapter->vlgrp &&
4311                             (status & E1000_RXD_STAT_VP))) {
4312                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4313                                                  le16_to_cpu(rx_desc->special) &
4314                                                  E1000_RXD_SPC_VLAN_MASK);
4315                 } else {
4316                         netif_receive_skb(skb);
4317                 }
4318 #else /* CONFIG_E1000_NAPI */
4319                 if (unlikely(adapter->vlgrp &&
4320                             (status & E1000_RXD_STAT_VP))) {
4321                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4322                                         le16_to_cpu(rx_desc->special) &
4323                                         E1000_RXD_SPC_VLAN_MASK);
4324                 } else {
4325                         netif_rx(skb);
4326                 }
4327 #endif /* CONFIG_E1000_NAPI */
4328                 netdev->last_rx = jiffies;
4329
4330 next_desc:
4331                 rx_desc->status = 0;
4332
4333                 /* return some buffers to hardware, one at a time is too slow */
4334                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4335                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4336                         cleaned_count = 0;
4337                 }
4338
4339                 /* use prefetched values */
4340                 rx_desc = next_rxd;
4341                 buffer_info = next_buffer;
4342         }
4343         rx_ring->next_to_clean = i;
4344
4345         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4346         if (cleaned_count)
4347                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4348
4349         adapter->total_rx_packets += total_rx_packets;
4350         adapter->total_rx_bytes += total_rx_bytes;
4351         adapter->net_stats.rx_bytes += total_rx_bytes;
4352         adapter->net_stats.rx_packets += total_rx_packets;
4353         return cleaned;
4354 }
4355
4356 /**
4357  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
4358  * @adapter: board private structure
4359  **/
4360
4361 static bool
4362 #ifdef CONFIG_E1000_NAPI
4363 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4364                       struct e1000_rx_ring *rx_ring,
4365                       int *work_done, int work_to_do)
4366 #else
4367 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
4368                       struct e1000_rx_ring *rx_ring)
4369 #endif
4370 {
4371         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
4372         struct net_device *netdev = adapter->netdev;
4373         struct pci_dev *pdev = adapter->pdev;
4374         struct e1000_buffer *buffer_info, *next_buffer;
4375         struct e1000_ps_page *ps_page;
4376         struct e1000_ps_page_dma *ps_page_dma;
4377         struct sk_buff *skb;
4378         unsigned int i, j;
4379         uint32_t length, staterr;
4380         int cleaned_count = 0;
4381         bool cleaned = false;
4382         unsigned int total_rx_bytes=0, total_rx_packets=0;
4383
4384         i = rx_ring->next_to_clean;
4385         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4386         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4387         buffer_info = &rx_ring->buffer_info[i];
4388
4389         while (staterr & E1000_RXD_STAT_DD) {
4390                 ps_page = &rx_ring->ps_page[i];
4391                 ps_page_dma = &rx_ring->ps_page_dma[i];
4392 #ifdef CONFIG_E1000_NAPI
4393                 if (unlikely(*work_done >= work_to_do))
4394                         break;
4395                 (*work_done)++;
4396 #endif
4397                 skb = buffer_info->skb;
4398
4399                 /* in the packet split case this is header only */
4400                 prefetch(skb->data - NET_IP_ALIGN);
4401
4402                 if (++i == rx_ring->count) i = 0;
4403                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
4404                 prefetch(next_rxd);
4405
4406                 next_buffer = &rx_ring->buffer_info[i];
4407
4408                 cleaned = true;
4409                 cleaned_count++;
4410                 pci_unmap_single(pdev, buffer_info->dma,
4411                                  buffer_info->length,
4412                                  PCI_DMA_FROMDEVICE);
4413
4414                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
4415                         E1000_DBG("%s: Packet Split buffers didn't pick up"
4416                                   " the full packet\n", netdev->name);
4417                         dev_kfree_skb_irq(skb);
4418                         goto next_desc;
4419                 }
4420
4421                 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
4422                         dev_kfree_skb_irq(skb);
4423                         goto next_desc;
4424                 }
4425
4426                 length = le16_to_cpu(rx_desc->wb.middle.length0);
4427
4428                 if (unlikely(!length)) {
4429                         E1000_DBG("%s: Last part of the packet spanning"
4430                                   " multiple descriptors\n", netdev->name);
4431                         dev_kfree_skb_irq(skb);
4432                         goto next_desc;
4433                 }
4434
4435                 /* Good Receive */
4436                 skb_put(skb, length);
4437
4438                 {
4439                 /* this looks ugly, but it seems compiler issues make it
4440                    more efficient than reusing j */
4441                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
4442
4443                 /* page alloc/put takes too long and effects small packet
4444                  * throughput, so unsplit small packets and save the alloc/put*/
4445                 if (l1 && (l1 <= copybreak) && ((length + l1) <= adapter->rx_ps_bsize0)) {
4446                         u8 *vaddr;
4447                         /* there is no documentation about how to call
4448                          * kmap_atomic, so we can't hold the mapping
4449                          * very long */
4450                         pci_dma_sync_single_for_cpu(pdev,
4451                                 ps_page_dma->ps_page_dma[0],
4452                                 PAGE_SIZE,
4453                                 PCI_DMA_FROMDEVICE);
4454                         vaddr = kmap_atomic(ps_page->ps_page[0],
4455                                             KM_SKB_DATA_SOFTIRQ);
4456                         memcpy(skb_tail_pointer(skb), vaddr, l1);
4457                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
4458                         pci_dma_sync_single_for_device(pdev,
4459                                 ps_page_dma->ps_page_dma[0],
4460                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
4461                         /* remove the CRC */
4462                         l1 -= 4;
4463                         skb_put(skb, l1);
4464                         goto copydone;
4465                 } /* if */
4466                 }
4467
4468                 for (j = 0; j < adapter->rx_ps_pages; j++) {
4469                         if (!(length= le16_to_cpu(rx_desc->wb.upper.length[j])))
4470                                 break;
4471                         pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
4472                                         PAGE_SIZE, PCI_DMA_FROMDEVICE);
4473                         ps_page_dma->ps_page_dma[j] = 0;
4474                         skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
4475                                            length);
4476                         ps_page->ps_page[j] = NULL;
4477                         skb->len += length;
4478                         skb->data_len += length;
4479                         skb->truesize += length;
4480                 }
4481
4482                 /* strip the ethernet crc, problem is we're using pages now so
4483                  * this whole operation can get a little cpu intensive */
4484                 pskb_trim(skb, skb->len - 4);
4485
4486 copydone:
4487                 total_rx_bytes += skb->len;
4488                 total_rx_packets++;
4489
4490                 e1000_rx_checksum(adapter, staterr,
4491                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
4492                 skb->protocol = eth_type_trans(skb, netdev);
4493
4494                 if (likely(rx_desc->wb.upper.header_status &
4495                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
4496                         adapter->rx_hdr_split++;
4497 #ifdef CONFIG_E1000_NAPI
4498                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4499                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4500                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4501                                 E1000_RXD_SPC_VLAN_MASK);
4502                 } else {
4503                         netif_receive_skb(skb);
4504                 }
4505 #else /* CONFIG_E1000_NAPI */
4506                 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
4507                         vlan_hwaccel_rx(skb, adapter->vlgrp,
4508                                 le16_to_cpu(rx_desc->wb.middle.vlan) &
4509                                 E1000_RXD_SPC_VLAN_MASK);
4510                 } else {
4511                         netif_rx(skb);
4512                 }
4513 #endif /* CONFIG_E1000_NAPI */
4514                 netdev->last_rx = jiffies;
4515
4516 next_desc:
4517                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
4518                 buffer_info->skb = NULL;
4519
4520                 /* return some buffers to hardware, one at a time is too slow */
4521                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4522                         adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4523                         cleaned_count = 0;
4524                 }
4525
4526                 /* use prefetched values */
4527                 rx_desc = next_rxd;
4528                 buffer_info = next_buffer;
4529
4530                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
4531         }
4532         rx_ring->next_to_clean = i;
4533
4534         cleaned_count = E1000_DESC_UNUSED(rx_ring);
4535         if (cleaned_count)
4536                 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4537
4538         adapter->total_rx_packets += total_rx_packets;
4539         adapter->total_rx_bytes += total_rx_bytes;
4540         adapter->net_stats.rx_bytes += total_rx_bytes;
4541         adapter->net_stats.rx_packets += total_rx_packets;
4542         return cleaned;
4543 }
4544
4545 /**
4546  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4547  * @adapter: address of board private structure
4548  **/
4549
4550 static void
4551 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4552                        struct e1000_rx_ring *rx_ring,
4553                        int cleaned_count)
4554 {
4555         struct net_device *netdev = adapter->netdev;
4556         struct pci_dev *pdev = adapter->pdev;
4557         struct e1000_rx_desc *rx_desc;
4558         struct e1000_buffer *buffer_info;
4559         struct sk_buff *skb;
4560         unsigned int i;
4561         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4562
4563         i = rx_ring->next_to_use;
4564         buffer_info = &rx_ring->buffer_info[i];
4565
4566         while (cleaned_count--) {
4567                 skb = buffer_info->skb;
4568                 if (skb) {
4569                         skb_trim(skb, 0);
4570                         goto map_skb;
4571                 }
4572
4573                 skb = netdev_alloc_skb(netdev, bufsz);
4574                 if (unlikely(!skb)) {
4575                         /* Better luck next round */
4576                         adapter->alloc_rx_buff_failed++;
4577                         break;
4578                 }
4579
4580                 /* Fix for errata 23, can't cross 64kB boundary */
4581                 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4582                         struct sk_buff *oldskb = skb;
4583                         DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4584                                              "at %p\n", bufsz, skb->data);
4585                         /* Try again, without freeing the previous */
4586                         skb = netdev_alloc_skb(netdev, bufsz);
4587                         /* Failed allocation, critical failure */
4588                         if (!skb) {
4589                                 dev_kfree_skb(oldskb);
4590                                 break;
4591                         }
4592
4593                         if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4594                                 /* give up */
4595                                 dev_kfree_skb(skb);
4596                                 dev_kfree_skb(oldskb);
4597                                 break; /* while !buffer_info->skb */
4598                         }
4599
4600                         /* Use new allocation */
4601                         dev_kfree_skb(oldskb);
4602                 }
4603                 /* Make buffer alignment 2 beyond a 16 byte boundary
4604                  * this will result in a 16 byte aligned IP header after
4605                  * the 14 byte MAC header is removed
4606                  */
4607                 skb_reserve(skb, NET_IP_ALIGN);
4608
4609                 buffer_info->skb = skb;
4610                 buffer_info->length = adapter->rx_buffer_len;
4611 map_skb:
4612                 buffer_info->dma = pci_map_single(pdev,
4613                                                   skb->data,
4614                                                   adapter->rx_buffer_len,
4615                                                   PCI_DMA_FROMDEVICE);
4616
4617                 /* Fix for errata 23, can't cross 64kB boundary */
4618                 if (!e1000_check_64k_bound(adapter,
4619                                         (void *)(unsigned long)buffer_info->dma,
4620                                         adapter->rx_buffer_len)) {
4621                         DPRINTK(RX_ERR, ERR,
4622                                 "dma align check failed: %u bytes at %p\n",
4623                                 adapter->rx_buffer_len,
4624                                 (void *)(unsigned long)buffer_info->dma);
4625                         dev_kfree_skb(skb);
4626                         buffer_info->skb = NULL;
4627
4628                         pci_unmap_single(pdev, buffer_info->dma,
4629                                          adapter->rx_buffer_len,
4630                                          PCI_DMA_FROMDEVICE);
4631
4632                         break; /* while !buffer_info->skb */
4633                 }
4634                 rx_desc = E1000_RX_DESC(*rx_ring, i);
4635                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4636
4637                 if (unlikely(++i == rx_ring->count))
4638                         i = 0;
4639                 buffer_info = &rx_ring->buffer_info[i];
4640         }
4641
4642         if (likely(rx_ring->next_to_use != i)) {
4643                 rx_ring->next_to_use = i;
4644                 if (unlikely(i-- == 0))
4645                         i = (rx_ring->count - 1);
4646
4647                 /* Force memory writes to complete before letting h/w
4648                  * know there are new descriptors to fetch.  (Only
4649                  * applicable for weak-ordered memory model archs,
4650                  * such as IA-64). */
4651                 wmb();
4652                 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4653         }
4654 }
4655
4656 /**
4657  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
4658  * @adapter: address of board private structure
4659  **/
4660
4661 static void
4662 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
4663                           struct e1000_rx_ring *rx_ring,
4664                           int cleaned_count)
4665 {
4666         struct net_device *netdev = adapter->netdev;
4667         struct pci_dev *pdev = adapter->pdev;
4668         union e1000_rx_desc_packet_split *rx_desc;
4669         struct e1000_buffer *buffer_info;
4670         struct e1000_ps_page *ps_page;
4671         struct e1000_ps_page_dma *ps_page_dma;
4672         struct sk_buff *skb;
4673         unsigned int i, j;
4674
4675         i = rx_ring->next_to_use;
4676         buffer_info = &rx_ring->buffer_info[i];
4677         ps_page = &rx_ring->ps_page[i];
4678         ps_page_dma = &rx_ring->ps_page_dma[i];
4679
4680         while (cleaned_count--) {
4681                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
4682
4683                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
4684                         if (j < adapter->rx_ps_pages) {
4685                                 if (likely(!ps_page->ps_page[j])) {
4686                                         ps_page->ps_page[j] =
4687                                                 alloc_page(GFP_ATOMIC);
4688                                         if (unlikely(!ps_page->ps_page[j])) {
4689                                                 adapter->alloc_rx_buff_failed++;
4690                                                 goto no_buffers;
4691                                         }
4692                                         ps_page_dma->ps_page_dma[j] =
4693                                                 pci_map_page(pdev,
4694                                                             ps_page->ps_page[j],
4695                                                             0, PAGE_SIZE,
4696                                                             PCI_DMA_FROMDEVICE);
4697                                 }
4698                                 /* Refresh the desc even if buffer_addrs didn't
4699                                  * change because each write-back erases
4700                                  * this info.
4701                                  */
4702                                 rx_desc->read.buffer_addr[j+1] =
4703                                      cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4704                         } else
4705                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
4706                 }
4707
4708                 skb = netdev_alloc_skb(netdev,
4709                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4710
4711                 if (unlikely(!skb)) {
4712                         adapter->alloc_rx_buff_failed++;
4713                         break;
4714                 }
4715
4716                 /* Make buffer alignment 2 beyond a 16 byte boundary
4717                  * this will result in a 16 byte aligned IP header after
4718                  * the 14 byte MAC header is removed
4719                  */
4720                 skb_reserve(skb, NET_IP_ALIGN);
4721
4722                 buffer_info->skb = skb;
4723                 buffer_info->length = adapter->rx_ps_bsize0;
4724                 buffer_info->dma = pci_map_single(pdev, skb->data,
4725                                                   adapter->rx_ps_bsize0,
4726                                                   PCI_DMA_FROMDEVICE);
4727
4728                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4729
4730                 if (unlikely(++i == rx_ring->count)) i = 0;
4731                 buffer_info = &rx_ring->buffer_info[i];
4732                 ps_page = &rx_ring->ps_page[i];
4733                 ps_page_dma = &rx_ring->ps_page_dma[i];
4734         }
4735
4736 no_buffers:
4737         if (likely(rx_ring->next_to_use != i)) {
4738                 rx_ring->next_to_use = i;
4739                 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4740
4741                 /* Force memory writes to complete before letting h/w
4742                  * know there are new descriptors to fetch.  (Only
4743                  * applicable for weak-ordered memory model archs,
4744                  * such as IA-64). */
4745                 wmb();
4746                 /* Hardware increments by 16 bytes, but packet split
4747                  * descriptors are 32 bytes...so we increment tail
4748                  * twice as much.
4749                  */
4750                 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4751         }
4752 }
4753
4754 /**
4755  * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4756  * @adapter:
4757  **/
4758
4759 static void
4760 e1000_smartspeed(struct e1000_adapter *adapter)
4761 {
4762         uint16_t phy_status;
4763         uint16_t phy_ctrl;
4764
4765         if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4766            !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4767                 return;
4768
4769         if (adapter->smartspeed == 0) {
4770                 /* If Master/Slave config fault is asserted twice,
4771                  * we assume back-to-back */
4772                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4773                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4774                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4775                 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4776                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4777                 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4778                         phy_ctrl &= ~CR_1000T_MS_ENABLE;
4779                         e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4780                                             phy_ctrl);
4781                         adapter->smartspeed++;
4782                         if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4783                            !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4784                                                &phy_ctrl)) {
4785                                 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4786                                              MII_CR_RESTART_AUTO_NEG);
4787                                 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4788                                                     phy_ctrl);
4789                         }
4790                 }
4791                 return;
4792         } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4793                 /* If still no link, perhaps using 2/3 pair cable */
4794                 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4795                 phy_ctrl |= CR_1000T_MS_ENABLE;
4796                 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4797                 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4798                    !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4799                         phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4800                                      MII_CR_RESTART_AUTO_NEG);
4801                         e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4802                 }
4803         }
4804         /* Restart process after E1000_SMARTSPEED_MAX iterations */
4805         if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4806                 adapter->smartspeed = 0;
4807 }
4808
4809 /**
4810  * e1000_ioctl -
4811  * @netdev:
4812  * @ifreq:
4813  * @cmd:
4814  **/
4815
4816 static int
4817 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4818 {
4819         switch (cmd) {
4820         case SIOCGMIIPHY:
4821         case SIOCGMIIREG:
4822         case SIOCSMIIREG:
4823                 return e1000_mii_ioctl(netdev, ifr, cmd);
4824         default:
4825                 return -EOPNOTSUPP;
4826         }
4827 }
4828
4829 /**
4830  * e1000_mii_ioctl -
4831  * @netdev:
4832  * @ifreq:
4833  * @cmd:
4834  **/
4835
4836 static int
4837 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4838 {
4839         struct e1000_adapter *adapter = netdev_priv(netdev);
4840         struct mii_ioctl_data *data = if_mii(ifr);
4841         int retval;
4842         uint16_t mii_reg;
4843         uint16_t spddplx;
4844         unsigned long flags;
4845
4846         if (adapter->hw.media_type != e1000_media_type_copper)
4847                 return -EOPNOTSUPP;
4848
4849         switch (cmd) {
4850         case SIOCGMIIPHY:
4851                 data->phy_id = adapter->hw.phy_addr;
4852                 break;
4853         case SIOCGMIIREG:
4854                 if (!capable(CAP_NET_ADMIN))
4855                         return -EPERM;
4856                 spin_lock_irqsave(&adapter->stats_lock, flags);
4857                 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4858                                    &data->val_out)) {
4859                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4860                         return -EIO;
4861                 }
4862                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4863                 break;
4864         case SIOCSMIIREG:
4865                 if (!capable(CAP_NET_ADMIN))
4866                         return -EPERM;
4867                 if (data->reg_num & ~(0x1F))
4868                         return -EFAULT;
4869                 mii_reg = data->val_in;
4870                 spin_lock_irqsave(&adapter->stats_lock, flags);
4871                 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4872                                         mii_reg)) {
4873                         spin_unlock_irqrestore(&adapter->stats_lock, flags);
4874                         return -EIO;
4875                 }
4876                 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4877                 if (adapter->hw.media_type == e1000_media_type_copper) {
4878                         switch (data->reg_num) {
4879                         case PHY_CTRL:
4880                                 if (mii_reg & MII_CR_POWER_DOWN)
4881                                         break;
4882                                 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4883                                         adapter->hw.autoneg = 1;
4884                                         adapter->hw.autoneg_advertised = 0x2F;
4885                                 } else {
4886                                         if (mii_reg & 0x40)
4887                                                 spddplx = SPEED_1000;
4888                                         else if (mii_reg & 0x2000)
4889                                                 spddplx = SPEED_100;
4890                                         else
4891                                                 spddplx = SPEED_10;
4892                                         spddplx += (mii_reg & 0x100)
4893                                                    ? DUPLEX_FULL :
4894                                                    DUPLEX_HALF;
4895                                         retval = e1000_set_spd_dplx(adapter,
4896                                                                     spddplx);
4897                                         if (retval)
4898                                                 return retval;
4899                                 }
4900                                 if (netif_running(adapter->netdev))
4901                                         e1000_reinit_locked(adapter);
4902                                 else
4903                                         e1000_reset(adapter);
4904                                 break;
4905                         case M88E1000_PHY_SPEC_CTRL:
4906                         case M88E1000_EXT_PHY_SPEC_CTRL:
4907                                 if (e1000_phy_reset(&adapter->hw))
4908                                         return -EIO;
4909                                 break;
4910                         }
4911                 } else {
4912                         switch (data->reg_num) {
4913                         case PHY_CTRL:
4914                                 if (mii_reg & MII_CR_POWER_DOWN)
4915                                         break;
4916                                 if (netif_running(adapter->netdev))
4917                                         e1000_reinit_locked(adapter);
4918                                 else
4919                                         e1000_reset(adapter);
4920                                 break;
4921                         }
4922                 }
4923                 break;
4924         default:
4925                 return -EOPNOTSUPP;
4926         }
4927         return E1000_SUCCESS;
4928 }
4929
4930 void
4931 e1000_pci_set_mwi(struct e1000_hw *hw)
4932 {
4933         struct e1000_adapter *adapter = hw->back;
4934         int ret_val = pci_set_mwi(adapter->pdev);
4935
4936         if (ret_val)
4937                 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4938 }
4939
4940 void
4941 e1000_pci_clear_mwi(struct e1000_hw *hw)
4942 {
4943         struct e1000_adapter *adapter = hw->back;
4944
4945         pci_clear_mwi(adapter->pdev);
4946 }
4947
4948 int
4949 e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4950 {
4951         struct e1000_adapter *adapter = hw->back;
4952         return pcix_get_mmrbc(adapter->pdev);
4953 }
4954
4955 void
4956 e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4957 {
4958         struct e1000_adapter *adapter = hw->back;
4959         pcix_set_mmrbc(adapter->pdev, mmrbc);
4960 }
4961
4962 int32_t
4963 e1000_read_pcie_cap_reg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4964 {
4965     struct e1000_adapter *adapter = hw->back;
4966     uint16_t cap_offset;
4967
4968     cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4969     if (!cap_offset)
4970         return -E1000_ERR_CONFIG;
4971
4972     pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4973
4974     return E1000_SUCCESS;
4975 }
4976
4977 void
4978 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4979 {
4980         outl(value, port);
4981 }
4982
4983 static void
4984 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4985 {
4986         struct e1000_adapter *adapter = netdev_priv(netdev);
4987         uint32_t ctrl, rctl;
4988
4989         if (!test_bit(__E1000_DOWN, &adapter->flags))
4990                 e1000_irq_disable(adapter);
4991         adapter->vlgrp = grp;
4992
4993         if (grp) {
4994                 /* enable VLAN tag insert/strip */
4995                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4996                 ctrl |= E1000_CTRL_VME;
4997                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4998
4999                 if (adapter->hw.mac_type != e1000_ich8lan) {
5000                         /* enable VLAN receive filtering */
5001                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5002                         rctl |= E1000_RCTL_VFE;
5003                         rctl &= ~E1000_RCTL_CFIEN;
5004                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5005                         e1000_update_mng_vlan(adapter);
5006                 }
5007         } else {
5008                 /* disable VLAN tag insert/strip */
5009                 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5010                 ctrl &= ~E1000_CTRL_VME;
5011                 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5012
5013                 if (adapter->hw.mac_type != e1000_ich8lan) {
5014                         /* disable VLAN filtering */
5015                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5016                         rctl &= ~E1000_RCTL_VFE;
5017                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5018                         if (adapter->mng_vlan_id !=
5019                             (uint16_t)E1000_MNG_VLAN_NONE) {
5020                                 e1000_vlan_rx_kill_vid(netdev,
5021                                                        adapter->mng_vlan_id);
5022                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
5023                         }
5024                 }
5025         }
5026
5027         if (!test_bit(__E1000_DOWN, &adapter->flags))
5028                 e1000_irq_enable(adapter);
5029 }
5030
5031 static void
5032 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
5033 {
5034         struct e1000_adapter *adapter = netdev_priv(netdev);
5035         uint32_t vfta, index;
5036
5037         if ((adapter->hw.mng_cookie.status &
5038              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5039             (vid == adapter->mng_vlan_id))
5040                 return;
5041         /* add VID to filter table */
5042         index = (vid >> 5) & 0x7F;
5043         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5044         vfta |= (1 << (vid & 0x1F));
5045         e1000_write_vfta(&adapter->hw, index, vfta);
5046 }
5047
5048 static void
5049 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
5050 {
5051         struct e1000_adapter *adapter = netdev_priv(netdev);
5052         uint32_t vfta, index;
5053
5054         if (!test_bit(__E1000_DOWN, &adapter->flags))
5055                 e1000_irq_disable(adapter);
5056         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5057         if (!test_bit(__E1000_DOWN, &adapter->flags))
5058                 e1000_irq_enable(adapter);
5059
5060         if ((adapter->hw.mng_cookie.status &
5061              E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
5062             (vid == adapter->mng_vlan_id)) {
5063                 /* release control to f/w */
5064                 e1000_release_hw_control(adapter);
5065                 return;
5066         }
5067
5068         /* remove VID from filter table */
5069         index = (vid >> 5) & 0x7F;
5070         vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
5071         vfta &= ~(1 << (vid & 0x1F));
5072         e1000_write_vfta(&adapter->hw, index, vfta);
5073 }
5074
5075 static void
5076 e1000_restore_vlan(struct e1000_adapter *adapter)
5077 {
5078         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5079
5080         if (adapter->vlgrp) {
5081                 uint16_t vid;
5082                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5083                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5084                                 continue;
5085                         e1000_vlan_rx_add_vid(adapter->netdev, vid);
5086                 }
5087         }
5088 }
5089
5090 int
5091 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
5092 {
5093         adapter->hw.autoneg = 0;
5094
5095         /* Fiber NICs only allow 1000 gbps Full duplex */
5096         if ((adapter->hw.media_type == e1000_media_type_fiber) &&
5097                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
5098                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5099                 return -EINVAL;
5100         }
5101
5102         switch (spddplx) {
5103         case SPEED_10 + DUPLEX_HALF:
5104                 adapter->hw.forced_speed_duplex = e1000_10_half;
5105                 break;
5106         case SPEED_10 + DUPLEX_FULL:
5107                 adapter->hw.forced_speed_duplex = e1000_10_full;
5108                 break;
5109         case SPEED_100 + DUPLEX_HALF:
5110                 adapter->hw.forced_speed_duplex = e1000_100_half;
5111                 break;
5112         case SPEED_100 + DUPLEX_FULL:
5113                 adapter->hw.forced_speed_duplex = e1000_100_full;
5114                 break;
5115         case SPEED_1000 + DUPLEX_FULL:
5116                 adapter->hw.autoneg = 1;
5117                 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
5118                 break;
5119         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5120         default:
5121                 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
5122                 return -EINVAL;
5123         }
5124         return 0;
5125 }
5126
5127 static int
5128 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5129 {
5130         struct net_device *netdev = pci_get_drvdata(pdev);
5131         struct e1000_adapter *adapter = netdev_priv(netdev);
5132         uint32_t ctrl, ctrl_ext, rctl, status;
5133         uint32_t wufc = adapter->wol;
5134 #ifdef CONFIG_PM
5135         int retval = 0;
5136 #endif
5137
5138         netif_device_detach(netdev);
5139
5140         if (netif_running(netdev)) {
5141                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5142                 e1000_down(adapter);
5143         }
5144
5145 #ifdef CONFIG_PM
5146         retval = pci_save_state(pdev);
5147         if (retval)
5148                 return retval;
5149 #endif
5150
5151         status = E1000_READ_REG(&adapter->hw, STATUS);
5152         if (status & E1000_STATUS_LU)
5153                 wufc &= ~E1000_WUFC_LNKC;
5154
5155         if (wufc) {
5156                 e1000_setup_rctl(adapter);
5157                 e1000_set_rx_mode(netdev);
5158
5159                 /* turn on all-multi mode if wake on multicast is enabled */
5160                 if (wufc & E1000_WUFC_MC) {
5161                         rctl = E1000_READ_REG(&adapter->hw, RCTL);
5162                         rctl |= E1000_RCTL_MPE;
5163                         E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
5164                 }
5165
5166                 if (adapter->hw.mac_type >= e1000_82540) {
5167                         ctrl = E1000_READ_REG(&adapter->hw, CTRL);
5168                         /* advertise wake from D3Cold */
5169                         #define E1000_CTRL_ADVD3WUC 0x00100000
5170                         /* phy power management enable */
5171                         #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5172                         ctrl |= E1000_CTRL_ADVD3WUC |
5173                                 E1000_CTRL_EN_PHY_PWR_MGMT;
5174                         E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
5175                 }
5176
5177                 if (adapter->hw.media_type == e1000_media_type_fiber ||
5178                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
5179                         /* keep the laser running in D3 */
5180                         ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
5181                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5182                         E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
5183                 }
5184
5185                 /* Allow time for pending master requests to run */
5186                 e1000_disable_pciex_master(&adapter->hw);
5187
5188                 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
5189                 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
5190                 pci_enable_wake(pdev, PCI_D3hot, 1);
5191                 pci_enable_wake(pdev, PCI_D3cold, 1);
5192         } else {
5193                 E1000_WRITE_REG(&adapter->hw, WUC, 0);
5194                 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
5195                 pci_enable_wake(pdev, PCI_D3hot, 0);
5196                 pci_enable_wake(pdev, PCI_D3cold, 0);
5197         }
5198
5199         e1000_release_manageability(adapter);
5200
5201         /* make sure adapter isn't asleep if manageability is enabled */
5202         if (adapter->en_mng_pt) {
5203                 pci_enable_wake(pdev, PCI_D3hot, 1);
5204                 pci_enable_wake(pdev, PCI_D3cold, 1);
5205         }
5206
5207         if (adapter->hw.phy_type == e1000_phy_igp_3)
5208                 e1000_phy_powerdown_workaround(&adapter->hw);
5209
5210         if (netif_running(netdev))
5211                 e1000_free_irq(adapter);
5212
5213         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5214          * would have already happened in close and is redundant. */
5215         e1000_release_hw_control(adapter);
5216
5217         pci_disable_device(pdev);
5218
5219         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5220
5221         return 0;
5222 }
5223
5224 #ifdef CONFIG_PM
5225 static int
5226 e1000_resume(struct pci_dev *pdev)
5227 {
5228         struct net_device *netdev = pci_get_drvdata(pdev);
5229         struct e1000_adapter *adapter = netdev_priv(netdev);
5230         uint32_t err;
5231
5232         pci_set_power_state(pdev, PCI_D0);
5233         pci_restore_state(pdev);
5234         if ((err = pci_enable_device(pdev))) {
5235                 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
5236                 return err;
5237         }
5238         pci_set_master(pdev);
5239
5240         pci_enable_wake(pdev, PCI_D3hot, 0);
5241         pci_enable_wake(pdev, PCI_D3cold, 0);
5242
5243         if (netif_running(netdev) && (err = e1000_request_irq(adapter)))
5244                 return err;
5245
5246         e1000_power_up_phy(adapter);
5247         e1000_reset(adapter);
5248         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5249
5250         e1000_init_manageability(adapter);
5251
5252         if (netif_running(netdev))
5253                 e1000_up(adapter);
5254
5255         netif_device_attach(netdev);
5256
5257         /* If the controller is 82573 and f/w is AMT, do not set
5258          * DRV_LOAD until the interface is up.  For all other cases,
5259          * let the f/w know that the h/w is now under the control
5260          * of the driver. */
5261         if (adapter->hw.mac_type != e1000_82573 ||
5262             !e1000_check_mng_mode(&adapter->hw))
5263                 e1000_get_hw_control(adapter);
5264
5265         return 0;
5266 }
5267 #endif
5268
5269 static void e1000_shutdown(struct pci_dev *pdev)
5270 {
5271         e1000_suspend(pdev, PMSG_SUSPEND);
5272 }
5273
5274 #ifdef CONFIG_NET_POLL_CONTROLLER
5275 /*
5276  * Polling 'interrupt' - used by things like netconsole to send skbs
5277  * without having to re-enable interrupts. It's not called while
5278  * the interrupt routine is executing.
5279  */
5280 static void
5281 e1000_netpoll(struct net_device *netdev)
5282 {
5283         struct e1000_adapter *adapter = netdev_priv(netdev);
5284
5285         disable_irq(adapter->pdev->irq);
5286         e1000_intr(adapter->pdev->irq, netdev);
5287         e1000_clean_tx_irq(adapter, adapter->tx_ring);
5288 #ifndef CONFIG_E1000_NAPI
5289         adapter->clean_rx(adapter, adapter->rx_ring);
5290 #endif
5291         enable_irq(adapter->pdev->irq);
5292 }
5293 #endif
5294
5295 /**
5296  * e1000_io_error_detected - called when PCI error is detected
5297  * @pdev: Pointer to PCI device
5298  * @state: The current pci conneection state
5299  *
5300  * This function is called after a PCI bus error affecting
5301  * this device has been detected.
5302  */
5303 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
5304 {
5305         struct net_device *netdev = pci_get_drvdata(pdev);
5306         struct e1000_adapter *adapter = netdev->priv;
5307
5308         netif_device_detach(netdev);
5309
5310         if (netif_running(netdev))
5311                 e1000_down(adapter);
5312         pci_disable_device(pdev);
5313
5314         /* Request a slot slot reset. */
5315         return PCI_ERS_RESULT_NEED_RESET;
5316 }
5317
5318 /**
5319  * e1000_io_slot_reset - called after the pci bus has been reset.
5320  * @pdev: Pointer to PCI device
5321  *
5322  * Restart the card from scratch, as if from a cold-boot. Implementation
5323  * resembles the first-half of the e1000_resume routine.
5324  */
5325 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5326 {
5327         struct net_device *netdev = pci_get_drvdata(pdev);
5328         struct e1000_adapter *adapter = netdev->priv;
5329
5330         if (pci_enable_device(pdev)) {
5331                 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
5332                 return PCI_ERS_RESULT_DISCONNECT;
5333         }
5334         pci_set_master(pdev);
5335
5336         pci_enable_wake(pdev, PCI_D3hot, 0);
5337         pci_enable_wake(pdev, PCI_D3cold, 0);
5338
5339         e1000_reset(adapter);
5340         E1000_WRITE_REG(&adapter->hw, WUS, ~0);
5341
5342         return PCI_ERS_RESULT_RECOVERED;
5343 }
5344
5345 /**
5346  * e1000_io_resume - called when traffic can start flowing again.
5347  * @pdev: Pointer to PCI device
5348  *
5349  * This callback is called when the error recovery driver tells us that
5350  * its OK to resume normal operation. Implementation resembles the
5351  * second-half of the e1000_resume routine.
5352  */
5353 static void e1000_io_resume(struct pci_dev *pdev)
5354 {
5355         struct net_device *netdev = pci_get_drvdata(pdev);
5356         struct e1000_adapter *adapter = netdev->priv;
5357
5358         e1000_init_manageability(adapter);
5359
5360         if (netif_running(netdev)) {
5361                 if (e1000_up(adapter)) {
5362                         printk("e1000: can't bring device back up after reset\n");
5363                         return;
5364                 }
5365         }
5366
5367         netif_device_attach(netdev);
5368
5369         /* If the controller is 82573 and f/w is AMT, do not set
5370          * DRV_LOAD until the interface is up.  For all other cases,
5371          * let the f/w know that the h/w is now under the control
5372          * of the driver. */
5373         if (adapter->hw.mac_type != e1000_82573 ||
5374             !e1000_check_mng_mode(&adapter->hw))
5375                 e1000_get_hw_control(adapter);
5376
5377 }
5378
5379 /* e1000_main.c */