drivers/net/igb/igb_main.c

   1 /*******************************************************************************
   2
   3   Intel(R) Gigabit Ethernet Linux driver
   4   Copyright(c) 2007 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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/init.h>
  31 #include <linux/vmalloc.h>
  32 #include <linux/pagemap.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/tcp.h>
  35 #include <linux/ipv6.h>
  36 #include <net/checksum.h>
  37 #include <net/ip6_checksum.h>
  38 #include <linux/mii.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/pci.h>
  42 #include <linux/delay.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/if_ether.h>
  45
  46 #include "igb.h"
  47
  48 #define DRV_VERSION "1.0.8-k2"
  49 char igb_driver_name[] = "igb";
  50 char igb_driver_version[] = DRV_VERSION;
  51 static const char igb_driver_string[] =
  52                                 "Intel(R) Gigabit Ethernet Network Driver";
  53 static const char igb_copyright[] = "Copyright (c) 2007 Intel Corporation.";
  54
  55
  56 static const struct e1000_info *igb_info_tbl[] = {
  57         [board_82575] = &e1000_82575_info,
  58 };
  59
  60 static struct pci_device_id igb_pci_tbl[] = {
  61         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 },
  62         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 },
  63         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 },
  64         /* required last entry */
  65         {0, }
  66 };
  67
  68 MODULE_DEVICE_TABLE(pci, igb_pci_tbl);
  69
  70 void igb_reset(struct igb_adapter *);
  71 static int igb_setup_all_tx_resources(struct igb_adapter *);
  72 static int igb_setup_all_rx_resources(struct igb_adapter *);
  73 static void igb_free_all_tx_resources(struct igb_adapter *);
  74 static void igb_free_all_rx_resources(struct igb_adapter *);
  75 static void igb_free_tx_resources(struct igb_adapter *, struct igb_ring *);
  76 static void igb_free_rx_resources(struct igb_adapter *, struct igb_ring *);
  77 void igb_update_stats(struct igb_adapter *);
  78 static int igb_probe(struct pci_dev *, const struct pci_device_id *);
  79 static void __devexit igb_remove(struct pci_dev *pdev);
  80 static int igb_sw_init(struct igb_adapter *);
  81 static int igb_open(struct net_device *);
  82 static int igb_close(struct net_device *);
  83 static void igb_configure_tx(struct igb_adapter *);
  84 static void igb_configure_rx(struct igb_adapter *);
  85 static void igb_setup_rctl(struct igb_adapter *);
  86 static void igb_clean_all_tx_rings(struct igb_adapter *);
  87 static void igb_clean_all_rx_rings(struct igb_adapter *);
  88 static void igb_clean_tx_ring(struct igb_adapter *, struct igb_ring *);
  89 static void igb_clean_rx_ring(struct igb_adapter *, struct igb_ring *);
  90 static void igb_set_multi(struct net_device *);
  91 static void igb_update_phy_info(unsigned long);
  92 static void igb_watchdog(unsigned long);
  93 static void igb_watchdog_task(struct work_struct *);
  94 static int igb_xmit_frame_ring_adv(struct sk_buff *, struct net_device *,
  95                                   struct igb_ring *);
  96 static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *);
  97 static struct net_device_stats *igb_get_stats(struct net_device *);
  98 static int igb_change_mtu(struct net_device *, int);
  99 static int igb_set_mac(struct net_device *, void *);
 100 static irqreturn_t igb_intr(int irq, void *);
 101 static irqreturn_t igb_intr_msi(int irq, void *);
 102 static irqreturn_t igb_msix_other(int irq, void *);
 103 static irqreturn_t igb_msix_rx(int irq, void *);
 104 static irqreturn_t igb_msix_tx(int irq, void *);
 105 static int igb_clean_rx_ring_msix(struct napi_struct *, int);
 106 static bool igb_clean_tx_irq(struct igb_adapter *, struct igb_ring *);
 107 static int igb_clean(struct napi_struct *, int);
 108 static bool igb_clean_rx_irq_adv(struct igb_adapter *,
 109                                  struct igb_ring *, int *, int);
 110 static void igb_alloc_rx_buffers_adv(struct igb_adapter *,
 111                                      struct igb_ring *, int);
 112 static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
 113 static void igb_tx_timeout(struct net_device *);
 114 static void igb_reset_task(struct work_struct *);
 115 static void igb_vlan_rx_register(struct net_device *, struct vlan_group *);
 116 static void igb_vlan_rx_add_vid(struct net_device *, u16);
 117 static void igb_vlan_rx_kill_vid(struct net_device *, u16);
 118 static void igb_restore_vlan(struct igb_adapter *);
 119
 120 static int igb_suspend(struct pci_dev *, pm_message_t);
 121 #ifdef CONFIG_PM
 122 static int igb_resume(struct pci_dev *);
 123 #endif
 124 static void igb_shutdown(struct pci_dev *);
 125
 126 #ifdef CONFIG_NET_POLL_CONTROLLER
 127 /* for netdump / net console */
 128 static void igb_netpoll(struct net_device *);
 129 #endif
 130
 131 static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
 132                      pci_channel_state_t);
 133 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
 134 static void igb_io_resume(struct pci_dev *);
 135
 136 static struct pci_error_handlers igb_err_handler = {
 137         .error_detected = igb_io_error_detected,
 138         .slot_reset = igb_io_slot_reset,
 139         .resume = igb_io_resume,
 140 };
 141
 142
 143 static struct pci_driver igb_driver = {
 144         .name     = igb_driver_name,
 145         .id_table = igb_pci_tbl,
 146         .probe    = igb_probe,
 147         .remove   = __devexit_p(igb_remove),
 148 #ifdef CONFIG_PM
 149         /* Power Managment Hooks */
 150         .suspend  = igb_suspend,
 151         .resume   = igb_resume,
 152 #endif
 153         .shutdown = igb_shutdown,
 154         .err_handler = &igb_err_handler
 155 };
 156
 157 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
 158 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
 159 MODULE_LICENSE("GPL");
 160 MODULE_VERSION(DRV_VERSION);
 161
 162 #ifdef DEBUG
 163 /**
 164  * igb_get_hw_dev_name - return device name string
 165  * used by hardware layer to print debugging information
 166  **/
 167 char *igb_get_hw_dev_name(struct e1000_hw *hw)
 168 {
 169         struct igb_adapter *adapter = hw->back;
 170         return adapter->netdev->name;
 171 }
 172 #endif
 173
 174 /**
 175  * igb_init_module - Driver Registration Routine
 176  *
 177  * igb_init_module is the first routine called when the driver is
 178  * loaded. All it does is register with the PCI subsystem.
 179  **/
 180 static int __init igb_init_module(void)
 181 {
 182         int ret;
 183         printk(KERN_INFO "%s - version %s\n",
 184                igb_driver_string, igb_driver_version);
 185
 186         printk(KERN_INFO "%s\n", igb_copyright);
 187
 188         ret = pci_register_driver(&igb_driver);
 189         return ret;
 190 }
 191
 192 module_init(igb_init_module);
 193
 194 /**
 195  * igb_exit_module - Driver Exit Cleanup Routine
 196  *
 197  * igb_exit_module is called just before the driver is removed
 198  * from memory.
 199  **/
 200 static void __exit igb_exit_module(void)
 201 {
 202         pci_unregister_driver(&igb_driver);
 203 }
 204
 205 module_exit(igb_exit_module);
 206
 207 /**
 208  * igb_alloc_queues - Allocate memory for all rings
 209  * @adapter: board private structure to initialize
 210  *
 211  * We allocate one ring per queue at run-time since we don't know the
 212  * number of queues at compile-time.
 213  **/
 214 static int igb_alloc_queues(struct igb_adapter *adapter)
 215 {
 216         int i;
 217
 218         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
 219                                    sizeof(struct igb_ring), GFP_KERNEL);
 220         if (!adapter->tx_ring)
 221                 return -ENOMEM;
 222
 223         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
 224                                    sizeof(struct igb_ring), GFP_KERNEL);
 225         if (!adapter->rx_ring) {
 226                 kfree(adapter->tx_ring);
 227                 return -ENOMEM;
 228         }
 229
 230         for (i = 0; i < adapter->num_rx_queues; i++) {
 231                 struct igb_ring *ring = &(adapter->rx_ring[i]);
 232                 ring->adapter = adapter;
 233                 ring->itr_register = E1000_ITR;
 234
 235                 if (!ring->napi.poll)
 236                         netif_napi_add(adapter->netdev, &ring->napi, igb_clean,
 237                                        adapter->napi.weight /
 238                                        adapter->num_rx_queues);
 239         }
 240         return 0;
 241 }
 242
 243 #define IGB_N0_QUEUE -1
 244 static void igb_assign_vector(struct igb_adapter *adapter, int rx_queue,
 245                               int tx_queue, int msix_vector)
 246 {
 247         u32 msixbm = 0;
 248         struct e1000_hw *hw = &adapter->hw;
 249                 /* The 82575 assigns vectors using a bitmask, which matches the
 250                    bitmask for the EICR/EIMS/EIMC registers.  To assign one
 251                    or more queues to a vector, we write the appropriate bits
 252                    into the MSIXBM register for that vector. */
 253                 if (rx_queue > IGB_N0_QUEUE) {
 254                         msixbm = E1000_EICR_RX_QUEUE0 << rx_queue;
 255                         adapter->rx_ring[rx_queue].eims_value = msixbm;
 256                 }
 257                 if (tx_queue > IGB_N0_QUEUE) {
 258                         msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue;
 259                         adapter->tx_ring[tx_queue].eims_value =
 260                                   E1000_EICR_TX_QUEUE0 << tx_queue;
 261                 }
 262                 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm);
 263 }
 264
 265 /**
 266  * igb_configure_msix - Configure MSI-X hardware
 267  *
 268  * igb_configure_msix sets up the hardware to properly
 269  * generate MSI-X interrupts.
 270  **/
 271 static void igb_configure_msix(struct igb_adapter *adapter)
 272 {
 273         u32 tmp;
 274         int i, vector = 0;
 275         struct e1000_hw *hw = &adapter->hw;
 276
 277         adapter->eims_enable_mask = 0;
 278
 279         for (i = 0; i < adapter->num_tx_queues; i++) {
 280                 struct igb_ring *tx_ring = &adapter->tx_ring[i];
 281                 igb_assign_vector(adapter, IGB_N0_QUEUE, i, vector++);
 282                 adapter->eims_enable_mask |= tx_ring->eims_value;
 283                 if (tx_ring->itr_val)
 284                         writel(1000000000 / (tx_ring->itr_val * 256),
 285                                hw->hw_addr + tx_ring->itr_register);
 286                 else
 287                         writel(1, hw->hw_addr + tx_ring->itr_register);
 288         }
 289
 290         for (i = 0; i < adapter->num_rx_queues; i++) {
 291                 struct igb_ring *rx_ring = &adapter->rx_ring[i];
 292                 igb_assign_vector(adapter, i, IGB_N0_QUEUE, vector++);
 293                 adapter->eims_enable_mask |= rx_ring->eims_value;
 294                 if (rx_ring->itr_val)
 295                         writel(1000000000 / (rx_ring->itr_val * 256),
 296                                hw->hw_addr + rx_ring->itr_register);
 297                 else
 298                         writel(1, hw->hw_addr + rx_ring->itr_register);
 299         }
 300
 301
 302         /* set vector for other causes, i.e. link changes */
 303                 array_wr32(E1000_MSIXBM(0), vector++,
 304                                       E1000_EIMS_OTHER);
 305
 306                 /* disable IAM for ICR interrupt bits */
 307                 wr32(E1000_IAM, 0);
 308
 309                 tmp = rd32(E1000_CTRL_EXT);
 310                 /* enable MSI-X PBA support*/
 311                 tmp |= E1000_CTRL_EXT_PBA_CLR;
 312
 313                 /* Auto-Mask interrupts upon ICR read. */
 314                 tmp |= E1000_CTRL_EXT_EIAME;
 315                 tmp |= E1000_CTRL_EXT_IRCA;
 316
 317                 wr32(E1000_CTRL_EXT, tmp);
 318                 adapter->eims_enable_mask |= E1000_EIMS_OTHER;
 319
 320         wrfl();
 321 }
 322
 323 /**
 324  * igb_request_msix - Initialize MSI-X interrupts
 325  *
 326  * igb_request_msix allocates MSI-X vectors and requests interrupts from the
 327  * kernel.
 328  **/
 329 static int igb_request_msix(struct igb_adapter *adapter)
 330 {
 331         struct net_device *netdev = adapter->netdev;
 332         int i, err = 0, vector = 0;
 333
 334         vector = 0;
 335
 336         for (i = 0; i < adapter->num_tx_queues; i++) {
 337                 struct igb_ring *ring = &(adapter->tx_ring[i]);
 338                 sprintf(ring->name, "%s-tx%d", netdev->name, i);
 339                 err = request_irq(adapter->msix_entries[vector].vector,
 340                                   &igb_msix_tx, 0, ring->name,
 341                                   &(adapter->tx_ring[i]));
 342                 if (err)
 343                         goto out;
 344                 ring->itr_register = E1000_EITR(0) + (vector << 2);
 345                 ring->itr_val = adapter->itr;
 346                 vector++;
 347         }
 348         for (i = 0; i < adapter->num_rx_queues; i++) {
 349                 struct igb_ring *ring = &(adapter->rx_ring[i]);
 350                 if (strlen(netdev->name) < (IFNAMSIZ - 5))
 351                         sprintf(ring->name, "%s-rx%d", netdev->name, i);
 352                 else
 353                         memcpy(ring->name, netdev->name, IFNAMSIZ);
 354                 err = request_irq(adapter->msix_entries[vector].vector,
 355                                   &igb_msix_rx, 0, ring->name,
 356                                   &(adapter->rx_ring[i]));
 357                 if (err)
 358                         goto out;
 359                 ring->itr_register = E1000_EITR(0) + (vector << 2);
 360                 ring->itr_val = adapter->itr;
 361                 vector++;
 362         }
 363
 364         err = request_irq(adapter->msix_entries[vector].vector,
 365                           &igb_msix_other, 0, netdev->name, netdev);
 366         if (err)
 367                 goto out;
 368
 369         adapter->napi.poll = igb_clean_rx_ring_msix;
 370         for (i = 0; i < adapter->num_rx_queues; i++)
 371                 adapter->rx_ring[i].napi.poll = adapter->napi.poll;
 372         igb_configure_msix(adapter);
 373         return 0;
 374 out:
 375         return err;
 376 }
 377
 378 static void igb_reset_interrupt_capability(struct igb_adapter *adapter)
 379 {
 380         if (adapter->msix_entries) {
 381                 pci_disable_msix(adapter->pdev);
 382                 kfree(adapter->msix_entries);
 383                 adapter->msix_entries = NULL;
 384         } else if (adapter->msi_enabled)
 385                 pci_disable_msi(adapter->pdev);
 386         return;
 387 }
 388
 389
 390 /**
 391  * igb_set_interrupt_capability - set MSI or MSI-X if supported
 392  *
 393  * Attempt to configure interrupts using the best available
 394  * capabilities of the hardware and kernel.
 395  **/
 396 static void igb_set_interrupt_capability(struct igb_adapter *adapter)
 397 {
 398         int err;
 399         int numvecs, i;
 400
 401         numvecs = adapter->num_tx_queues + adapter->num_rx_queues + 1;
 402         adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry),
 403                                         GFP_KERNEL);
 404         if (!adapter->msix_entries)
 405                 goto msi_only;
 406
 407         for (i = 0; i < numvecs; i++)
 408                 adapter->msix_entries[i].entry = i;
 409
 410         err = pci_enable_msix(adapter->pdev,
 411                               adapter->msix_entries,
 412                               numvecs);
 413         if (err == 0)
 414                 return;
 415
 416         igb_reset_interrupt_capability(adapter);
 417
 418         /* If we can't do MSI-X, try MSI */
 419 msi_only:
 420         adapter->num_rx_queues = 1;
 421         if (!pci_enable_msi(adapter->pdev))
 422                 adapter->msi_enabled = 1;
 423         return;
 424 }
 425
 426 /**
 427  * igb_request_irq - initialize interrupts
 428  *
 429  * Attempts to configure interrupts using the best available
 430  * capabilities of the hardware and kernel.
 431  **/
 432 static int igb_request_irq(struct igb_adapter *adapter)
 433 {
 434         struct net_device *netdev = adapter->netdev;
 435         struct e1000_hw *hw = &adapter->hw;
 436         int err = 0;
 437
 438         if (adapter->msix_entries) {
 439                 err = igb_request_msix(adapter);
 440                 if (!err) {
 441                         struct e1000_hw *hw = &adapter->hw;
 442                         /* enable IAM, auto-mask,
 443                          * DO NOT USE EIAME or IAME in legacy mode */
 444                         wr32(E1000_IAM, IMS_ENABLE_MASK);
 445                         goto request_done;
 446                 }
 447                 /* fall back to MSI */
 448                 igb_reset_interrupt_capability(adapter);
 449                 if (!pci_enable_msi(adapter->pdev))
 450                         adapter->msi_enabled = 1;
 451                 igb_free_all_tx_resources(adapter);
 452                 igb_free_all_rx_resources(adapter);
 453                 adapter->num_rx_queues = 1;
 454                 igb_alloc_queues(adapter);
 455         }
 456         if (adapter->msi_enabled) {
 457                 err = request_irq(adapter->pdev->irq, &igb_intr_msi, 0,
 458                                   netdev->name, netdev);
 459                 if (!err)
 460                         goto request_done;
 461                 /* fall back to legacy interrupts */
 462                 igb_reset_interrupt_capability(adapter);
 463                 adapter->msi_enabled = 0;
 464         }
 465
 466         err = request_irq(adapter->pdev->irq, &igb_intr, IRQF_SHARED,
 467                           netdev->name, netdev);
 468
 469         if (err) {
 470                 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
 471                         err);
 472                 goto request_done;
 473         }
 474
 475         /* enable IAM, auto-mask */
 476         wr32(E1000_IAM, IMS_ENABLE_MASK);
 477
 478 request_done:
 479         return err;
 480 }
 481
 482 static void igb_free_irq(struct igb_adapter *adapter)
 483 {
 484         struct net_device *netdev = adapter->netdev;
 485
 486         if (adapter->msix_entries) {
 487                 int vector = 0, i;
 488
 489                 for (i = 0; i < adapter->num_tx_queues; i++)
 490                         free_irq(adapter->msix_entries[vector++].vector,
 491                                 &(adapter->tx_ring[i]));
 492                 for (i = 0; i < adapter->num_rx_queues; i++)
 493                         free_irq(adapter->msix_entries[vector++].vector,
 494                                 &(adapter->rx_ring[i]));
 495
 496                 free_irq(adapter->msix_entries[vector++].vector, netdev);
 497                 return;
 498         }
 499
 500         free_irq(adapter->pdev->irq, netdev);
 501 }
 502
 503 /**
 504  * igb_irq_disable - Mask off interrupt generation on the NIC
 505  * @adapter: board private structure
 506  **/
 507 static void igb_irq_disable(struct igb_adapter *adapter)
 508 {
 509         struct e1000_hw *hw = &adapter->hw;
 510
 511         if (adapter->msix_entries) {
 512                 wr32(E1000_EIMC, ~0);
 513                 wr32(E1000_EIAC, 0);
 514         }
 515         wr32(E1000_IMC, ~0);
 516         wrfl();
 517         synchronize_irq(adapter->pdev->irq);
 518 }
 519
 520 /**
 521  * igb_irq_enable - Enable default interrupt generation settings
 522  * @adapter: board private structure
 523  **/
 524 static void igb_irq_enable(struct igb_adapter *adapter)
 525 {
 526         struct e1000_hw *hw = &adapter->hw;
 527
 528         if (adapter->msix_entries) {
 529                 wr32(E1000_EIMS,
 530                                 adapter->eims_enable_mask);
 531                 wr32(E1000_EIAC,
 532                                 adapter->eims_enable_mask);
 533                 wr32(E1000_IMS, E1000_IMS_LSC);
 534         } else
 535         wr32(E1000_IMS, IMS_ENABLE_MASK);
 536 }
 537
 538 static void igb_update_mng_vlan(struct igb_adapter *adapter)
 539 {
 540         struct net_device *netdev = adapter->netdev;
 541         u16 vid = adapter->hw.mng_cookie.vlan_id;
 542         u16 old_vid = adapter->mng_vlan_id;
 543         if (adapter->vlgrp) {
 544                 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
 545                         if (adapter->hw.mng_cookie.status &
 546                                 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
 547                                 igb_vlan_rx_add_vid(netdev, vid);
 548                                 adapter->mng_vlan_id = vid;
 549                         } else
 550                                 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
 551
 552                         if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
 553                                         (vid != old_vid) &&
 554                             !vlan_group_get_device(adapter->vlgrp, old_vid))
 555                                 igb_vlan_rx_kill_vid(netdev, old_vid);
 556                 } else
 557                         adapter->mng_vlan_id = vid;
 558         }
 559 }
 560
 561 /**
 562  * igb_release_hw_control - release control of the h/w to f/w
 563  * @adapter: address of board private structure
 564  *
 565  * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
 566  * For ASF and Pass Through versions of f/w this means that the
 567  * driver is no longer loaded.
 568  *
 569  **/
 570 static void igb_release_hw_control(struct igb_adapter *adapter)
 571 {
 572         struct e1000_hw *hw = &adapter->hw;
 573         u32 ctrl_ext;
 574
 575         /* Let firmware take over control of h/w */
 576         ctrl_ext = rd32(E1000_CTRL_EXT);
 577         wr32(E1000_CTRL_EXT,
 578                         ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
 579 }
 580
 581
 582 /**
 583  * igb_get_hw_control - get control of the h/w from f/w
 584  * @adapter: address of board private structure
 585  *
 586  * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
 587  * For ASF and Pass Through versions of f/w this means that
 588  * the driver is loaded.
 589  *
 590  **/
 591 static void igb_get_hw_control(struct igb_adapter *adapter)
 592 {
 593         struct e1000_hw *hw = &adapter->hw;
 594         u32 ctrl_ext;
 595
 596         /* Let firmware know the driver has taken over */
 597         ctrl_ext = rd32(E1000_CTRL_EXT);
 598         wr32(E1000_CTRL_EXT,
 599                         ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
 600 }
 601
 602 static void igb_init_manageability(struct igb_adapter *adapter)
 603 {
 604         struct e1000_hw *hw = &adapter->hw;
 605
 606         if (adapter->en_mng_pt) {
 607                 u32 manc2h = rd32(E1000_MANC2H);
 608                 u32 manc = rd32(E1000_MANC);
 609
 610                 /* disable hardware interception of ARP */
 611                 manc &= ~(E1000_MANC_ARP_EN);
 612
 613                 /* enable receiving management packets to the host */
 614                 /* this will probably generate destination unreachable messages
 615                  * from the host OS, but the packets will be handled on SMBUS */
 616                 manc |= E1000_MANC_EN_MNG2HOST;
 617 #define E1000_MNG2HOST_PORT_623 (1 << 5)
 618 #define E1000_MNG2HOST_PORT_664 (1 << 6)
 619                 manc2h |= E1000_MNG2HOST_PORT_623;
 620                 manc2h |= E1000_MNG2HOST_PORT_664;
 621                 wr32(E1000_MANC2H, manc2h);
 622
 623                 wr32(E1000_MANC, manc);
 624         }
 625 }
 626
 627 static void igb_release_manageability(struct igb_adapter *adapter)
 628 {
 629         struct e1000_hw *hw = &adapter->hw;
 630
 631         if (adapter->en_mng_pt) {
 632                 u32 manc = rd32(E1000_MANC);
 633
 634                 /* re-enable hardware interception of ARP */
 635                 manc |= E1000_MANC_ARP_EN;
 636                 manc &= ~E1000_MANC_EN_MNG2HOST;
 637
 638                 /* don't explicitly have to mess with MANC2H since
 639                  * MANC has an enable disable that gates MANC2H */
 640
 641                 /* XXX stop the hardware watchdog ? */
 642                 wr32(E1000_MANC, manc);
 643         }
 644 }
 645
 646 /**
 647  * igb_configure - configure the hardware for RX and TX
 648  * @adapter: private board structure
 649  **/
 650 static void igb_configure(struct igb_adapter *adapter)
 651 {
 652         struct net_device *netdev = adapter->netdev;
 653         int i;
 654
 655         igb_get_hw_control(adapter);
 656         igb_set_multi(netdev);
 657
 658         igb_restore_vlan(adapter);
 659         igb_init_manageability(adapter);
 660
 661         igb_configure_tx(adapter);
 662         igb_setup_rctl(adapter);
 663         igb_configure_rx(adapter);
 664         /* call IGB_DESC_UNUSED which always leaves
 665          * at least 1 descriptor unused to make sure
 666          * next_to_use != next_to_clean */
 667         for (i = 0; i < adapter->num_rx_queues; i++) {
 668                 struct igb_ring *ring = &adapter->rx_ring[i];
 669                 igb_alloc_rx_buffers_adv(adapter, ring, IGB_DESC_UNUSED(ring));
 670         }
 671
 672
 673         adapter->tx_queue_len = netdev->tx_queue_len;
 674 }
 675
 676
 677 /**
 678  * igb_up - Open the interface and prepare it to handle traffic
 679  * @adapter: board private structure
 680  **/
 681
 682 int igb_up(struct igb_adapter *adapter)
 683 {
 684         struct e1000_hw *hw = &adapter->hw;
 685         int i;
 686
 687         /* hardware has been reset, we need to reload some things */
 688         igb_configure(adapter);
 689
 690         clear_bit(__IGB_DOWN, &adapter->state);
 691
 692         napi_enable(&adapter->napi);
 693
 694         if (adapter->msix_entries) {
 695                 for (i = 0; i < adapter->num_rx_queues; i++)
 696                         napi_enable(&adapter->rx_ring[i].napi);
 697                 igb_configure_msix(adapter);
 698         }
 699
 700         /* Clear any pending interrupts. */
 701         rd32(E1000_ICR);
 702         igb_irq_enable(adapter);
 703
 704         /* Fire a link change interrupt to start the watchdog. */
 705         wr32(E1000_ICS, E1000_ICS_LSC);
 706         return 0;
 707 }
 708
 709 void igb_down(struct igb_adapter *adapter)
 710 {
 711         struct e1000_hw *hw = &adapter->hw;
 712         struct net_device *netdev = adapter->netdev;
 713         u32 tctl, rctl;
 714         int i;
 715
 716         /* signal that we're down so the interrupt handler does not
 717          * reschedule our watchdog timer */
 718         set_bit(__IGB_DOWN, &adapter->state);
 719
 720         /* disable receives in the hardware */
 721         rctl = rd32(E1000_RCTL);
 722         wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
 723         /* flush and sleep below */
 724
 725         netif_stop_queue(netdev);
 726
 727         /* disable transmits in the hardware */
 728         tctl = rd32(E1000_TCTL);
 729         tctl &= ~E1000_TCTL_EN;
 730         wr32(E1000_TCTL, tctl);
 731         /* flush both disables and wait for them to finish */
 732         wrfl();
 733         msleep(10);
 734
 735         napi_disable(&adapter->napi);
 736
 737         if (adapter->msix_entries)
 738                 for (i = 0; i < adapter->num_rx_queues; i++)
 739                         napi_disable(&adapter->rx_ring[i].napi);
 740         igb_irq_disable(adapter);
 741
 742         del_timer_sync(&adapter->watchdog_timer);
 743         del_timer_sync(&adapter->phy_info_timer);
 744
 745         netdev->tx_queue_len = adapter->tx_queue_len;
 746         netif_carrier_off(netdev);
 747         adapter->link_speed = 0;
 748         adapter->link_duplex = 0;
 749
 750         igb_reset(adapter);
 751         igb_clean_all_tx_rings(adapter);
 752         igb_clean_all_rx_rings(adapter);
 753 }
 754
 755 void igb_reinit_locked(struct igb_adapter *adapter)
 756 {
 757         WARN_ON(in_interrupt());
 758         while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
 759                 msleep(1);
 760         igb_down(adapter);
 761         igb_up(adapter);
 762         clear_bit(__IGB_RESETTING, &adapter->state);
 763 }
 764
 765 void igb_reset(struct igb_adapter *adapter)
 766 {
 767         struct e1000_hw *hw = &adapter->hw;
 768         struct e1000_fc_info *fc = &adapter->hw.fc;
 769         u32 pba = 0, tx_space, min_tx_space, min_rx_space;
 770         u16 hwm;
 771
 772         /* Repartition Pba for greater than 9k mtu
 773          * To take effect CTRL.RST is required.
 774          */
 775         pba = E1000_PBA_34K;
 776
 777         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
 778                 /* adjust PBA for jumbo frames */
 779                 wr32(E1000_PBA, pba);
 780
 781                 /* To maintain wire speed transmits, the Tx FIFO should be
 782                  * large enough to accommodate two full transmit packets,
 783                  * rounded up to the next 1KB and expressed in KB.  Likewise,
 784                  * the Rx FIFO should be large enough to accommodate at least
 785                  * one full receive packet and is similarly rounded up and
 786                  * expressed in KB. */
 787                 pba = rd32(E1000_PBA);
 788                 /* upper 16 bits has Tx packet buffer allocation size in KB */
 789                 tx_space = pba >> 16;
 790                 /* lower 16 bits has Rx packet buffer allocation size in KB */
 791                 pba &= 0xffff;
 792                 /* the tx fifo also stores 16 bytes of information about the tx
 793                  * but don't include ethernet FCS because hardware appends it */
 794                 min_tx_space = (adapter->max_frame_size +
 795                                 sizeof(struct e1000_tx_desc) -
 796                                 ETH_FCS_LEN) * 2;
 797                 min_tx_space = ALIGN(min_tx_space, 1024);
 798                 min_tx_space >>= 10;
 799                 /* software strips receive CRC, so leave room for it */
 800                 min_rx_space = adapter->max_frame_size;
 801                 min_rx_space = ALIGN(min_rx_space, 1024);
 802                 min_rx_space >>= 10;
 803
 804                 /* If current Tx allocation is less than the min Tx FIFO size,
 805                  * and the min Tx FIFO size is less than the current Rx FIFO
 806                  * allocation, take space away from current Rx allocation */
 807                 if (tx_space < min_tx_space &&
 808                     ((min_tx_space - tx_space) < pba)) {
 809                         pba = pba - (min_tx_space - tx_space);
 810
 811                         /* if short on rx space, rx wins and must trump tx
 812                          * adjustment */
 813                         if (pba < min_rx_space)
 814                                 pba = min_rx_space;
 815                 }
 816         }
 817         wr32(E1000_PBA, pba);
 818
 819         /* flow control settings */
 820         /* The high water mark must be low enough to fit one full frame
 821          * (or the size used for early receive) above it in the Rx FIFO.
 822          * Set it to the lower of:
 823          * - 90% of the Rx FIFO size, or
 824          * - the full Rx FIFO size minus one full frame */
 825         hwm = min(((pba << 10) * 9 / 10),
 826                   ((pba << 10) - adapter->max_frame_size));
 827
 828         fc->high_water = hwm & 0xFFF8;  /* 8-byte granularity */
 829         fc->low_water = fc->high_water - 8;
 830         fc->pause_time = 0xFFFF;
 831         fc->send_xon = 1;
 832         fc->type = fc->original_type;
 833
 834         /* Allow time for pending master requests to run */
 835         adapter->hw.mac.ops.reset_hw(&adapter->hw);
 836         wr32(E1000_WUC, 0);
 837
 838         if (adapter->hw.mac.ops.init_hw(&adapter->hw))
 839                 dev_err(&adapter->pdev->dev, "Hardware Error\n");
 840
 841         igb_update_mng_vlan(adapter);
 842
 843         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
 844         wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE);
 845
 846         igb_reset_adaptive(&adapter->hw);
 847         adapter->hw.phy.ops.get_phy_info(&adapter->hw);
 848         igb_release_manageability(adapter);
 849 }
 850
 851 /**
 852  * igb_probe - Device Initialization Routine
 853  * @pdev: PCI device information struct
 854  * @ent: entry in igb_pci_tbl
 855  *
 856  * Returns 0 on success, negative on failure
 857  *
 858  * igb_probe initializes an adapter identified by a pci_dev structure.
 859  * The OS initialization, configuring of the adapter private structure,
 860  * and a hardware reset occur.
 861  **/
 862 static int __devinit igb_probe(struct pci_dev *pdev,
 863                                const struct pci_device_id *ent)
 864 {
 865         struct net_device *netdev;
 866         struct igb_adapter *adapter;
 867         struct e1000_hw *hw;
 868         const struct e1000_info *ei = igb_info_tbl[ent->driver_data];
 869         unsigned long mmio_start, mmio_len;
 870         static int cards_found;
 871         int i, err, pci_using_dac;
 872         u16 eeprom_data = 0;
 873         u16 eeprom_apme_mask = IGB_EEPROM_APME;
 874         u32 part_num;
 875
 876         err = pci_enable_device(pdev);
 877         if (err)
 878                 return err;
 879
 880         pci_using_dac = 0;
 881         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
 882         if (!err) {
 883                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
 884                 if (!err)
 885                         pci_using_dac = 1;
 886         } else {
 887                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 888                 if (err) {
 889                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 890                         if (err) {
 891                                 dev_err(&pdev->dev, "No usable DMA "
 892                                         "configuration, aborting\n");
 893                                 goto err_dma;
 894                         }
 895                 }
 896         }
 897
 898         err = pci_request_regions(pdev, igb_driver_name);
 899         if (err)
 900                 goto err_pci_reg;
 901
 902         pci_set_master(pdev);
 903
 904         err = -ENOMEM;
 905         netdev = alloc_etherdev(sizeof(struct igb_adapter));
 906         if (!netdev)
 907                 goto err_alloc_etherdev;
 908
 909         SET_NETDEV_DEV(netdev, &pdev->dev);
 910
 911         pci_set_drvdata(pdev, netdev);
 912         adapter = netdev_priv(netdev);
 913         adapter->netdev = netdev;
 914         adapter->pdev = pdev;
 915         hw = &adapter->hw;
 916         hw->back = adapter;
 917         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;
 918
 919         mmio_start = pci_resource_start(pdev, 0);
 920         mmio_len = pci_resource_len(pdev, 0);
 921
 922         err = -EIO;
 923         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
 924         if (!adapter->hw.hw_addr)
 925                 goto err_ioremap;
 926
 927         netdev->open = &igb_open;
 928         netdev->stop = &igb_close;
 929         netdev->get_stats = &igb_get_stats;
 930         netdev->set_multicast_list = &igb_set_multi;
 931         netdev->set_mac_address = &igb_set_mac;
 932         netdev->change_mtu = &igb_change_mtu;
 933         netdev->do_ioctl = &igb_ioctl;
 934         igb_set_ethtool_ops(netdev);
 935         netdev->tx_timeout = &igb_tx_timeout;
 936         netdev->watchdog_timeo = 5 * HZ;
 937         netif_napi_add(netdev, &adapter->napi, igb_clean, 64);
 938         netdev->vlan_rx_register = igb_vlan_rx_register;
 939         netdev->vlan_rx_add_vid = igb_vlan_rx_add_vid;
 940         netdev->vlan_rx_kill_vid = igb_vlan_rx_kill_vid;
 941 #ifdef CONFIG_NET_POLL_CONTROLLER
 942         netdev->poll_controller = igb_netpoll;
 943 #endif
 944         netdev->hard_start_xmit = &igb_xmit_frame_adv;
 945
 946         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
 947
 948         netdev->mem_start = mmio_start;
 949         netdev->mem_end = mmio_start + mmio_len;
 950
 951         adapter->bd_number = cards_found;
 952
 953         /* PCI config space info */
 954         hw->vendor_id = pdev->vendor;
 955         hw->device_id = pdev->device;
 956         hw->revision_id = pdev->revision;
 957         hw->subsystem_vendor_id = pdev->subsystem_vendor;
 958         hw->subsystem_device_id = pdev->subsystem_device;
 959
 960         /* setup the private structure */
 961         hw->back = adapter;
 962         /* Copy the default MAC, PHY and NVM function pointers */
 963         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
 964         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
 965         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
 966         /* Initialize skew-specific constants */
 967         err = ei->get_invariants(hw);
 968         if (err)
 969                 goto err_hw_init;
 970
 971         err = igb_sw_init(adapter);
 972         if (err)
 973                 goto err_sw_init;
 974
 975         igb_get_bus_info_pcie(hw);
 976
 977         hw->phy.autoneg_wait_to_complete = false;
 978         hw->mac.adaptive_ifs = true;
 979
 980         /* Copper options */
 981         if (hw->phy.media_type == e1000_media_type_copper) {
 982                 hw->phy.mdix = AUTO_ALL_MODES;
 983                 hw->phy.disable_polarity_correction = false;
 984                 hw->phy.ms_type = e1000_ms_hw_default;
 985         }
 986
 987         if (igb_check_reset_block(hw))
 988                 dev_info(&pdev->dev,
 989                         "PHY reset is blocked due to SOL/IDER session.\n");
 990
 991         netdev->features = NETIF_F_SG |
 992                            NETIF_F_HW_CSUM |
 993                            NETIF_F_HW_VLAN_TX |
 994                            NETIF_F_HW_VLAN_RX |
 995                            NETIF_F_HW_VLAN_FILTER;
 996
 997         netdev->features |= NETIF_F_TSO;
 998
 999         netdev->features |= NETIF_F_TSO6;
1000         if (pci_using_dac)
1001                 netdev->features |= NETIF_F_HIGHDMA;
1002
1003         netdev->features |= NETIF_F_LLTX;
1004         adapter->en_mng_pt = igb_enable_mng_pass_thru(&adapter->hw);
1005
1006         /* before reading the NVM, reset the controller to put the device in a
1007          * known good starting state */
1008         hw->mac.ops.reset_hw(hw);
1009
1010         /* make sure the NVM is good */
1011         if (igb_validate_nvm_checksum(hw) < 0) {
1012                 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
1013                 err = -EIO;
1014                 goto err_eeprom;
1015         }
1016
1017         /* copy the MAC address out of the NVM */
1018         if (hw->mac.ops.read_mac_addr(hw))
1019                 dev_err(&pdev->dev, "NVM Read Error\n");
1020
1021         memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
1022         memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
1023
1024         if (!is_valid_ether_addr(netdev->perm_addr)) {
1025                 dev_err(&pdev->dev, "Invalid MAC Address\n");
1026                 err = -EIO;
1027                 goto err_eeprom;
1028         }
1029
1030         init_timer(&adapter->watchdog_timer);
1031         adapter->watchdog_timer.function = &igb_watchdog;
1032         adapter->watchdog_timer.data = (unsigned long) adapter;
1033
1034         init_timer(&adapter->phy_info_timer);
1035         adapter->phy_info_timer.function = &igb_update_phy_info;
1036         adapter->phy_info_timer.data = (unsigned long) adapter;
1037
1038         INIT_WORK(&adapter->reset_task, igb_reset_task);
1039         INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
1040
1041         /* Initialize link & ring properties that are user-changeable */
1042         adapter->tx_ring->count = 256;
1043         for (i = 0; i < adapter->num_tx_queues; i++)
1044                 adapter->tx_ring[i].count = adapter->tx_ring->count;
1045         adapter->rx_ring->count = 256;
1046         for (i = 0; i < adapter->num_rx_queues; i++)
1047                 adapter->rx_ring[i].count = adapter->rx_ring->count;
1048
1049         adapter->fc_autoneg = true;
1050         hw->mac.autoneg = true;
1051         hw->phy.autoneg_advertised = 0x2f;
1052
1053         hw->fc.original_type = e1000_fc_default;
1054         hw->fc.type = e1000_fc_default;
1055
1056         adapter->itr_setting = 3;
1057         adapter->itr = IGB_START_ITR;
1058
1059         igb_validate_mdi_setting(hw);
1060
1061         adapter->rx_csum = 1;
1062
1063         /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1064          * enable the ACPI Magic Packet filter
1065          */
1066
1067         if (hw->bus.func == 0 ||
1068             hw->device_id == E1000_DEV_ID_82575EB_COPPER)
1069                 hw->nvm.ops.read_nvm(hw, NVM_INIT_CONTROL3_PORT_A, 1,
1070                                      &eeprom_data);
1071
1072         if (eeprom_data & eeprom_apme_mask)
1073                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1074
1075         /* now that we have the eeprom settings, apply the special cases where
1076          * the eeprom may be wrong or the board simply won't support wake on
1077          * lan on a particular port */
1078         switch (pdev->device) {
1079         case E1000_DEV_ID_82575GB_QUAD_COPPER:
1080                 adapter->eeprom_wol = 0;
1081                 break;
1082         case E1000_DEV_ID_82575EB_FIBER_SERDES:
1083                 /* Wake events only supported on port A for dual fiber
1084                  * regardless of eeprom setting */
1085                 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1)
1086                         adapter->eeprom_wol = 0;
1087                 break;
1088         }
1089
1090         /* initialize the wol settings based on the eeprom settings */
1091         adapter->wol = adapter->eeprom_wol;
1092
1093         /* reset the hardware with the new settings */
1094         igb_reset(adapter);
1095
1096         /* let the f/w know that the h/w is now under the control of the
1097          * driver. */
1098         igb_get_hw_control(adapter);
1099
1100         /* tell the stack to leave us alone until igb_open() is called */
1101         netif_carrier_off(netdev);
1102         netif_stop_queue(netdev);
1103
1104         strcpy(netdev->name, "eth%d");
1105         err = register_netdev(netdev);
1106         if (err)
1107                 goto err_register;
1108
1109         dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
1110         /* print bus type/speed/width info */
1111         dev_info(&pdev->dev,
1112                  "%s: (PCIe:%s:%s) %02x:%02x:%02x:%02x:%02x:%02x\n",
1113                  netdev->name,
1114                  ((hw->bus.speed == e1000_bus_speed_2500)
1115                   ? "2.5Gb/s" : "unknown"),
1116                  ((hw->bus.width == e1000_bus_width_pcie_x4)
1117                   ? "Width x4" : (hw->bus.width == e1000_bus_width_pcie_x1)
1118                   ? "Width x1" : "unknown"),
1119                  netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
1120                  netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
1121
1122         igb_read_part_num(hw, &part_num);
1123         dev_info(&pdev->dev, "%s: PBA No: %06x-%03x\n", netdev->name,
1124                 (part_num >> 8), (part_num & 0xff));
1125
1126         dev_info(&pdev->dev,
1127                 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
1128                 adapter->msix_entries ? "MSI-X" :
1129                 adapter->msi_enabled ? "MSI" : "legacy",
1130                 adapter->num_rx_queues, adapter->num_tx_queues);
1131
1132         cards_found++;
1133         return 0;
1134
1135 err_register:
1136         igb_release_hw_control(adapter);
1137 err_eeprom:
1138         if (!igb_check_reset_block(hw))
1139                 hw->phy.ops.reset_phy(hw);
1140
1141         if (hw->flash_address)
1142                 iounmap(hw->flash_address);
1143
1144         igb_remove_device(hw);
1145         kfree(adapter->tx_ring);
1146         kfree(adapter->rx_ring);
1147 err_sw_init:
1148 err_hw_init:
1149         iounmap(hw->hw_addr);
1150 err_ioremap:
1151         free_netdev(netdev);
1152 err_alloc_etherdev:
1153         pci_release_regions(pdev);
1154 err_pci_reg:
1155 err_dma:
1156         pci_disable_device(pdev);
1157         return err;
1158 }
1159
1160 /**
1161  * igb_remove - Device Removal Routine
1162  * @pdev: PCI device information struct
1163  *
1164  * igb_remove is called by the PCI subsystem to alert the driver
1165  * that it should release a PCI device.  The could be caused by a
1166  * Hot-Plug event, or because the driver is going to be removed from
1167  * memory.
1168  **/
1169 static void __devexit igb_remove(struct pci_dev *pdev)
1170 {
1171         struct net_device *netdev = pci_get_drvdata(pdev);
1172         struct igb_adapter *adapter = netdev_priv(netdev);
1173
1174         /* flush_scheduled work may reschedule our watchdog task, so
1175          * explicitly disable watchdog tasks from being rescheduled  */
1176         set_bit(__IGB_DOWN, &adapter->state);
1177         del_timer_sync(&adapter->watchdog_timer);
1178         del_timer_sync(&adapter->phy_info_timer);
1179
1180         flush_scheduled_work();
1181
1182
1183         igb_release_manageability(adapter);
1184
1185         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1186          * would have already happened in close and is redundant. */
1187         igb_release_hw_control(adapter);
1188
1189         unregister_netdev(netdev);
1190
1191         if (!igb_check_reset_block(&adapter->hw))
1192                 adapter->hw.phy.ops.reset_phy(&adapter->hw);
1193
1194         igb_remove_device(&adapter->hw);
1195         igb_reset_interrupt_capability(adapter);
1196
1197         kfree(adapter->tx_ring);
1198         kfree(adapter->rx_ring);
1199
1200         iounmap(adapter->hw.hw_addr);
1201         if (adapter->hw.flash_address)
1202                 iounmap(adapter->hw.flash_address);
1203         pci_release_regions(pdev);
1204
1205         free_netdev(netdev);
1206
1207         pci_disable_device(pdev);
1208 }
1209
1210 /**
1211  * igb_sw_init - Initialize general software structures (struct igb_adapter)
1212  * @adapter: board private structure to initialize
1213  *
1214  * igb_sw_init initializes the Adapter private data structure.
1215  * Fields are initialized based on PCI device information and
1216  * OS network device settings (MTU size).
1217  **/
1218 static int __devinit igb_sw_init(struct igb_adapter *adapter)
1219 {
1220         struct e1000_hw *hw = &adapter->hw;
1221         struct net_device *netdev = adapter->netdev;
1222         struct pci_dev *pdev = adapter->pdev;
1223
1224         pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
1225
1226         adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1227         adapter->rx_ps_hdr_size = 0; /* disable packet split */
1228         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1229         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1230
1231         /* Number of supported queues. */
1232         /* Having more queues than CPUs doesn't make sense. */
1233         adapter->num_tx_queues = 1;
1234         adapter->num_rx_queues = min(IGB_MAX_RX_QUEUES, num_online_cpus());
1235
1236         igb_set_interrupt_capability(adapter);
1237
1238         if (igb_alloc_queues(adapter)) {
1239                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1240                 return -ENOMEM;
1241         }
1242
1243         /* Explicitly disable IRQ since the NIC can be in any state. */
1244         igb_irq_disable(adapter);
1245
1246         set_bit(__IGB_DOWN, &adapter->state);
1247         return 0;
1248 }
1249
1250 /**
1251  * igb_open - Called when a network interface is made active
1252  * @netdev: network interface device structure
1253  *
1254  * Returns 0 on success, negative value on failure
1255  *
1256  * The open entry point is called when a network interface is made
1257  * active by the system (IFF_UP).  At this point all resources needed
1258  * for transmit and receive operations are allocated, the interrupt
1259  * handler is registered with the OS, the watchdog timer is started,
1260  * and the stack is notified that the interface is ready.
1261  **/
1262 static int igb_open(struct net_device *netdev)
1263 {
1264         struct igb_adapter *adapter = netdev_priv(netdev);
1265         struct e1000_hw *hw = &adapter->hw;
1266         int err;
1267         int i;
1268
1269         /* disallow open during test */
1270         if (test_bit(__IGB_TESTING, &adapter->state))
1271                 return -EBUSY;
1272
1273         /* allocate transmit descriptors */
1274         err = igb_setup_all_tx_resources(adapter);
1275         if (err)
1276                 goto err_setup_tx;
1277
1278         /* allocate receive descriptors */
1279         err = igb_setup_all_rx_resources(adapter);
1280         if (err)
1281                 goto err_setup_rx;
1282
1283         /* e1000_power_up_phy(adapter); */
1284
1285         adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
1286         if ((adapter->hw.mng_cookie.status &
1287              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
1288                 igb_update_mng_vlan(adapter);
1289
1290         /* before we allocate an interrupt, we must be ready to handle it.
1291          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1292          * as soon as we call pci_request_irq, so we have to setup our
1293          * clean_rx handler before we do so.  */
1294         igb_configure(adapter);
1295
1296         err = igb_request_irq(adapter);
1297         if (err)
1298                 goto err_req_irq;
1299
1300         /* From here on the code is the same as igb_up() */
1301         clear_bit(__IGB_DOWN, &adapter->state);
1302
1303         napi_enable(&adapter->napi);
1304         if (adapter->msix_entries)
1305                 for (i = 0; i < adapter->num_rx_queues; i++)
1306                         napi_enable(&adapter->rx_ring[i].napi);
1307
1308         igb_irq_enable(adapter);
1309
1310         /* Clear any pending interrupts. */
1311         rd32(E1000_ICR);
1312         /* Fire a link status change interrupt to start the watchdog. */
1313         wr32(E1000_ICS, E1000_ICS_LSC);
1314
1315         return 0;
1316
1317 err_req_irq:
1318         igb_release_hw_control(adapter);
1319         /* e1000_power_down_phy(adapter); */
1320         igb_free_all_rx_resources(adapter);
1321 err_setup_rx:
1322         igb_free_all_tx_resources(adapter);
1323 err_setup_tx:
1324         igb_reset(adapter);
1325
1326         return err;
1327 }
1328
1329 /**
1330  * igb_close - Disables a network interface
1331  * @netdev: network interface device structure
1332  *
1333  * Returns 0, this is not allowed to fail
1334  *
1335  * The close entry point is called when an interface is de-activated
1336  * by the OS.  The hardware is still under the driver's control, but
1337  * needs to be disabled.  A global MAC reset is issued to stop the
1338  * hardware, and all transmit and receive resources are freed.
1339  **/
1340 static int igb_close(struct net_device *netdev)
1341 {
1342         struct igb_adapter *adapter = netdev_priv(netdev);
1343
1344         WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
1345         igb_down(adapter);
1346
1347         igb_free_irq(adapter);
1348
1349         igb_free_all_tx_resources(adapter);
1350         igb_free_all_rx_resources(adapter);
1351
1352         /* kill manageability vlan ID if supported, but not if a vlan with
1353          * the same ID is registered on the host OS (let 8021q kill it) */
1354         if ((adapter->hw.mng_cookie.status &
1355                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1356              !(adapter->vlgrp &&
1357                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
1358                 igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1359
1360         return 0;
1361 }
1362
1363 /**
1364  * igb_setup_tx_resources - allocate Tx resources (Descriptors)
1365  * @adapter: board private structure
1366  * @tx_ring: tx descriptor ring (for a specific queue) to setup
1367  *
1368  * Return 0 on success, negative on failure
1369  **/
1370
1371 int igb_setup_tx_resources(struct igb_adapter *adapter,
1372                            struct igb_ring *tx_ring)
1373 {
1374         struct pci_dev *pdev = adapter->pdev;
1375         int size;
1376
1377         size = sizeof(struct igb_buffer) * tx_ring->count;
1378         tx_ring->buffer_info = vmalloc(size);
1379         if (!tx_ring->buffer_info)
1380                 goto err;
1381         memset(tx_ring->buffer_info, 0, size);
1382
1383         /* round up to nearest 4K */
1384         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc)
1385                         + sizeof(u32);
1386         tx_ring->size = ALIGN(tx_ring->size, 4096);
1387
1388         tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
1389                                              &tx_ring->dma);
1390
1391         if (!tx_ring->desc)
1392                 goto err;
1393
1394         tx_ring->adapter = adapter;
1395         tx_ring->next_to_use = 0;
1396         tx_ring->next_to_clean = 0;
1397         spin_lock_init(&tx_ring->tx_clean_lock);
1398         spin_lock_init(&tx_ring->tx_lock);
1399         return 0;
1400
1401 err:
1402         vfree(tx_ring->buffer_info);
1403         dev_err(&adapter->pdev->dev,
1404                 "Unable to allocate memory for the transmit descriptor ring\n");
1405         return -ENOMEM;
1406 }
1407
1408 /**
1409  * igb_setup_all_tx_resources - wrapper to allocate Tx resources
1410  *                                (Descriptors) for all queues
1411  * @adapter: board private structure
1412  *
1413  * Return 0 on success, negative on failure
1414  **/
1415 static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
1416 {
1417         int i, err = 0;
1418
1419         for (i = 0; i < adapter->num_tx_queues; i++) {
1420                 err = igb_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1421                 if (err) {
1422                         dev_err(&adapter->pdev->dev,
1423                                 "Allocation for Tx Queue %u failed\n", i);
1424                         for (i--; i >= 0; i--)
1425                                 igb_free_tx_resources(adapter,
1426                                                         &adapter->tx_ring[i]);
1427                         break;
1428                 }
1429         }
1430
1431         return err;
1432 }
1433
1434 /**
1435  * igb_configure_tx - Configure transmit Unit after Reset
1436  * @adapter: board private structure
1437  *
1438  * Configure the Tx unit of the MAC after a reset.
1439  **/
1440 static void igb_configure_tx(struct igb_adapter *adapter)
1441 {
1442         u64 tdba, tdwba;
1443         struct e1000_hw *hw = &adapter->hw;
1444         u32 tctl;
1445         u32 txdctl, txctrl;
1446         int i;
1447
1448         for (i = 0; i < adapter->num_tx_queues; i++) {
1449                 struct igb_ring *ring = &(adapter->tx_ring[i]);
1450
1451                 wr32(E1000_TDLEN(i),
1452                                 ring->count * sizeof(struct e1000_tx_desc));
1453                 tdba = ring->dma;
1454                 wr32(E1000_TDBAL(i),
1455                                 tdba & 0x00000000ffffffffULL);
1456                 wr32(E1000_TDBAH(i), tdba >> 32);
1457
1458                 tdwba = ring->dma + ring->count * sizeof(struct e1000_tx_desc);
1459                 tdwba |= 1; /* enable head wb */
1460                 wr32(E1000_TDWBAL(i),
1461                                 tdwba & 0x00000000ffffffffULL);
1462                 wr32(E1000_TDWBAH(i), tdwba >> 32);
1463
1464                 ring->head = E1000_TDH(i);
1465                 ring->tail = E1000_TDT(i);
1466                 writel(0, hw->hw_addr + ring->tail);
1467                 writel(0, hw->hw_addr + ring->head);
1468                 txdctl = rd32(E1000_TXDCTL(i));
1469                 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1470                 wr32(E1000_TXDCTL(i), txdctl);
1471
1472                 /* Turn off Relaxed Ordering on head write-backs.  The
1473                  * writebacks MUST be delivered in order or it will
1474                  * completely screw up our bookeeping.
1475                  */
1476                 txctrl = rd32(E1000_DCA_TXCTRL(i));
1477                 txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1478                 wr32(E1000_DCA_TXCTRL(i), txctrl);
1479         }
1480
1481
1482
1483         /* Use the default values for the Tx Inter Packet Gap (IPG) timer */
1484
1485         /* Program the Transmit Control Register */
1486
1487         tctl = rd32(E1000_TCTL);
1488         tctl &= ~E1000_TCTL_CT;
1489         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1490                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1491
1492         igb_config_collision_dist(hw);
1493
1494         /* Setup Transmit Descriptor Settings for eop descriptor */
1495         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS;
1496
1497         /* Enable transmits */
1498         tctl |= E1000_TCTL_EN;
1499
1500         wr32(E1000_TCTL, tctl);
1501 }
1502
1503 /**
1504  * igb_setup_rx_resources - allocate Rx resources (Descriptors)
1505  * @adapter: board private structure
1506  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
1507  *
1508  * Returns 0 on success, negative on failure
1509  **/
1510
1511 int igb_setup_rx_resources(struct igb_adapter *adapter,
1512                            struct igb_ring *rx_ring)
1513 {
1514         struct pci_dev *pdev = adapter->pdev;
1515         int size, desc_len;
1516
1517         size = sizeof(struct igb_buffer) * rx_ring->count;
1518         rx_ring->buffer_info = vmalloc(size);
1519         if (!rx_ring->buffer_info)
1520                 goto err;
1521         memset(rx_ring->buffer_info, 0, size);
1522
1523         desc_len = sizeof(union e1000_adv_rx_desc);
1524
1525         /* Round up to nearest 4K */
1526         rx_ring->size = rx_ring->count * desc_len;
1527         rx_ring->size = ALIGN(rx_ring->size, 4096);
1528
1529         rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
1530                                              &rx_ring->dma);
1531
1532         if (!rx_ring->desc)
1533                 goto err;
1534
1535         rx_ring->next_to_clean = 0;
1536         rx_ring->next_to_use = 0;
1537         rx_ring->pending_skb = NULL;
1538
1539         rx_ring->adapter = adapter;
1540         /* FIXME: do we want to setup ring->napi->poll here? */
1541         rx_ring->napi.poll = adapter->napi.poll;
1542
1543         return 0;
1544
1545 err:
1546         vfree(rx_ring->buffer_info);
1547         dev_err(&adapter->pdev->dev, "Unable to allocate memory for "
1548                 "the receive descriptor ring\n");
1549         return -ENOMEM;
1550 }
1551
1552 /**
1553  * igb_setup_all_rx_resources - wrapper to allocate Rx resources
1554  *                                (Descriptors) for all queues
1555  * @adapter: board private structure
1556  *
1557  * Return 0 on success, negative on failure
1558  **/
1559 static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
1560 {
1561         int i, err = 0;
1562
1563         for (i = 0; i < adapter->num_rx_queues; i++) {
1564                 err = igb_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1565                 if (err) {
1566                         dev_err(&adapter->pdev->dev,
1567                                 "Allocation for Rx Queue %u failed\n", i);
1568                         for (i--; i >= 0; i--)
1569                                 igb_free_rx_resources(adapter,
1570                                                         &adapter->rx_ring[i]);
1571                         break;
1572                 }
1573         }
1574
1575         return err;
1576 }
1577
1578 /**
1579  * igb_setup_rctl - configure the receive control registers
1580  * @adapter: Board private structure
1581  **/
1582 static void igb_setup_rctl(struct igb_adapter *adapter)
1583 {
1584         struct e1000_hw *hw = &adapter->hw;
1585         u32 rctl;
1586         u32 srrctl = 0;
1587         int i;
1588
1589         rctl = rd32(E1000_RCTL);
1590
1591         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1592
1593         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1594                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1595                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1596
1597         /* disable the stripping of CRC because it breaks
1598          * BMC firmware connected over SMBUS
1599         rctl |= E1000_RCTL_SECRC;
1600         */
1601
1602         rctl &= ~E1000_RCTL_SBP;
1603
1604         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1605                 rctl &= ~E1000_RCTL_LPE;
1606         else
1607                 rctl |= E1000_RCTL_LPE;
1608         if (adapter->rx_buffer_len <= IGB_RXBUFFER_2048) {
1609                 /* Setup buffer sizes */
1610                 rctl &= ~E1000_RCTL_SZ_4096;
1611                 rctl |= E1000_RCTL_BSEX;
1612                 switch (adapter->rx_buffer_len) {
1613                 case IGB_RXBUFFER_256:
1614                         rctl |= E1000_RCTL_SZ_256;
1615                         rctl &= ~E1000_RCTL_BSEX;
1616                         break;
1617                 case IGB_RXBUFFER_512:
1618                         rctl |= E1000_RCTL_SZ_512;
1619                         rctl &= ~E1000_RCTL_BSEX;
1620                         break;
1621                 case IGB_RXBUFFER_1024:
1622                         rctl |= E1000_RCTL_SZ_1024;
1623                         rctl &= ~E1000_RCTL_BSEX;
1624                         break;
1625                 case IGB_RXBUFFER_2048:
1626                 default:
1627                         rctl |= E1000_RCTL_SZ_2048;
1628                         rctl &= ~E1000_RCTL_BSEX;
1629                         break;
1630                 case IGB_RXBUFFER_4096:
1631                         rctl |= E1000_RCTL_SZ_4096;
1632                         break;
1633                 case IGB_RXBUFFER_8192:
1634                         rctl |= E1000_RCTL_SZ_8192;
1635                         break;
1636                 case IGB_RXBUFFER_16384:
1637                         rctl |= E1000_RCTL_SZ_16384;
1638                         break;
1639                 }
1640         } else {
1641                 rctl &= ~E1000_RCTL_BSEX;
1642                 srrctl = adapter->rx_buffer_len >> E1000_SRRCTL_BSIZEPKT_SHIFT;
1643         }
1644
1645         /* 82575 and greater support packet-split where the protocol
1646          * header is placed in skb->data and the packet data is
1647          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1648          * In the case of a non-split, skb->data is linearly filled,
1649          * followed by the page buffers.  Therefore, skb->data is
1650          * sized to hold the largest protocol header.
1651          */
1652         /* allocations using alloc_page take too long for regular MTU
1653          * so only enable packet split for jumbo frames */
1654         if (rctl & E1000_RCTL_LPE) {
1655                 adapter->rx_ps_hdr_size = IGB_RXBUFFER_128;
1656                 srrctl = adapter->rx_ps_hdr_size <<
1657                          E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1658                 /* buffer size is ALWAYS one page */
1659                 srrctl |= PAGE_SIZE >> E1000_SRRCTL_BSIZEPKT_SHIFT;
1660                 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1661         } else {
1662                 adapter->rx_ps_hdr_size = 0;
1663                 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1664         }
1665
1666         for (i = 0; i < adapter->num_rx_queues; i++)
1667                 wr32(E1000_SRRCTL(i), srrctl);
1668
1669         wr32(E1000_RCTL, rctl);
1670 }
1671
1672 /**
1673  * igb_configure_rx - Configure receive Unit after Reset
1674  * @adapter: board private structure
1675  *
1676  * Configure the Rx unit of the MAC after a reset.
1677  **/
1678 static void igb_configure_rx(struct igb_adapter *adapter)
1679 {
1680         u64 rdba;
1681         struct e1000_hw *hw = &adapter->hw;
1682         u32 rctl, rxcsum;
1683         u32 rxdctl;
1684         int i;
1685
1686         /* disable receives while setting up the descriptors */
1687         rctl = rd32(E1000_RCTL);
1688         wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
1689         wrfl();
1690         mdelay(10);
1691
1692         if (adapter->itr_setting > 3)
1693                 wr32(E1000_ITR,
1694                                 1000000000 / (adapter->itr * 256));
1695
1696         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1697          * the Base and Length of the Rx Descriptor Ring */
1698         for (i = 0; i < adapter->num_rx_queues; i++) {
1699                 struct igb_ring *ring = &(adapter->rx_ring[i]);
1700                 rdba = ring->dma;
1701                 wr32(E1000_RDBAL(i),
1702                                 rdba & 0x00000000ffffffffULL);
1703                 wr32(E1000_RDBAH(i), rdba >> 32);
1704                 wr32(E1000_RDLEN(i),
1705                                ring->count * sizeof(union e1000_adv_rx_desc));
1706
1707                 ring->head = E1000_RDH(i);
1708                 ring->tail = E1000_RDT(i);
1709                 writel(0, hw->hw_addr + ring->tail);
1710                 writel(0, hw->hw_addr + ring->head);
1711
1712                 rxdctl = rd32(E1000_RXDCTL(i));
1713                 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1714                 rxdctl &= 0xFFF00000;
1715                 rxdctl |= IGB_RX_PTHRESH;
1716                 rxdctl |= IGB_RX_HTHRESH << 8;
1717                 rxdctl |= IGB_RX_WTHRESH << 16;
1718                 wr32(E1000_RXDCTL(i), rxdctl);
1719         }
1720
1721         if (adapter->num_rx_queues > 1) {
1722                 u32 random[10];
1723                 u32 mrqc;
1724                 u32 j, shift;
1725                 union e1000_reta {
1726                         u32 dword;
1727                         u8  bytes[4];
1728                 } reta;
1729
1730                 get_random_bytes(&random[0], 40);
1731
1732                 shift = 6;
1733                 for (j = 0; j < (32 * 4); j++) {
1734                         reta.bytes[j & 3] =
1735                                 (j % adapter->num_rx_queues) << shift;
1736                         if ((j & 3) == 3)
1737                                 writel(reta.dword,
1738                                        hw->hw_addr + E1000_RETA(0) + (j & ~3));
1739                 }
1740                 mrqc = E1000_MRQC_ENABLE_RSS_4Q;
1741
1742                 /* Fill out hash function seeds */
1743                 for (j = 0; j < 10; j++)
1744                         array_wr32(E1000_RSSRK(0), j, random[j]);
1745
1746                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
1747                          E1000_MRQC_RSS_FIELD_IPV4_TCP);
1748                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV6 |
1749                          E1000_MRQC_RSS_FIELD_IPV6_TCP);
1750                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV4_UDP |
1751                          E1000_MRQC_RSS_FIELD_IPV6_UDP);
1752                 mrqc |= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX |
1753                          E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
1754
1755
1756                 wr32(E1000_MRQC, mrqc);
1757
1758                 /* Multiqueue and raw packet checksumming are mutually
1759                  * exclusive.  Note that this not the same as TCP/IP
1760                  * checksumming, which works fine. */
1761                 rxcsum = rd32(E1000_RXCSUM);
1762                 rxcsum |= E1000_RXCSUM_PCSD;
1763                 wr32(E1000_RXCSUM, rxcsum);
1764         } else {
1765                 /* Enable Receive Checksum Offload for TCP and UDP */
1766                 rxcsum = rd32(E1000_RXCSUM);
1767                 if (adapter->rx_csum) {
1768                         rxcsum |= E1000_RXCSUM_TUOFL;
1769
1770                         /* Enable IPv4 payload checksum for UDP fragments
1771                          * Must be used in conjunction with packet-split. */
1772                         if (adapter->rx_ps_hdr_size)
1773                                 rxcsum |= E1000_RXCSUM_IPPCSE;
1774                 } else {
1775                         rxcsum &= ~E1000_RXCSUM_TUOFL;
1776                         /* don't need to clear IPPCSE as it defaults to 0 */
1777                 }
1778                 wr32(E1000_RXCSUM, rxcsum);
1779         }
1780
1781         if (adapter->vlgrp)
1782                 wr32(E1000_RLPML,
1783                                 adapter->max_frame_size + VLAN_TAG_SIZE);
1784         else
1785                 wr32(E1000_RLPML, adapter->max_frame_size);
1786
1787         /* Enable Receives */
1788         wr32(E1000_RCTL, rctl);
1789 }
1790
1791 /**
1792  * igb_free_tx_resources - Free Tx Resources per Queue
1793  * @adapter: board private structure
1794  * @tx_ring: Tx descriptor ring for a specific queue
1795  *
1796  * Free all transmit software resources
1797  **/
1798 static void igb_free_tx_resources(struct igb_adapter *adapter,
1799                                   struct igb_ring *tx_ring)
1800 {
1801         struct pci_dev *pdev = adapter->pdev;
1802
1803         igb_clean_tx_ring(adapter, tx_ring);
1804
1805         vfree(tx_ring->buffer_info);
1806         tx_ring->buffer_info = NULL;
1807
1808         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1809
1810         tx_ring->desc = NULL;
1811 }
1812
1813 /**
1814  * igb_free_all_tx_resources - Free Tx Resources for All Queues
1815  * @adapter: board private structure
1816  *
1817  * Free all transmit software resources
1818  **/
1819 static void igb_free_all_tx_resources(struct igb_adapter *adapter)
1820 {
1821         int i;
1822
1823         for (i = 0; i < adapter->num_tx_queues; i++)
1824                 igb_free_tx_resources(adapter, &adapter->tx_ring[i]);
1825 }
1826
1827 static void igb_unmap_and_free_tx_resource(struct igb_adapter *adapter,
1828                                            struct igb_buffer *buffer_info)
1829 {
1830         if (buffer_info->dma) {
1831                 pci_unmap_page(adapter->pdev,
1832                                 buffer_info->dma,
1833                                 buffer_info->length,
1834                                 PCI_DMA_TODEVICE);
1835                 buffer_info->dma = 0;
1836         }
1837         if (buffer_info->skb) {
1838                 dev_kfree_skb_any(buffer_info->skb);
1839                 buffer_info->skb = NULL;
1840         }
1841         buffer_info->time_stamp = 0;
1842         /* buffer_info must be completely set up in the transmit path */
1843 }
1844
1845 /**
1846  * igb_clean_tx_ring - Free Tx Buffers
1847  * @adapter: board private structure
1848  * @tx_ring: ring to be cleaned
1849  **/
1850 static void igb_clean_tx_ring(struct igb_adapter *adapter,
1851                               struct igb_ring *tx_ring)
1852 {
1853         struct igb_buffer *buffer_info;
1854         unsigned long size;
1855         unsigned int i;
1856
1857         if (!tx_ring->buffer_info)
1858                 return;
1859         /* Free all the Tx ring sk_buffs */
1860
1861         for (i = 0; i < tx_ring->count; i++) {
1862                 buffer_info = &tx_ring->buffer_info[i];
1863                 igb_unmap_and_free_tx_resource(adapter, buffer_info);
1864         }
1865
1866         size = sizeof(struct igb_buffer) * tx_ring->count;
1867         memset(tx_ring->buffer_info, 0, size);
1868
1869         /* Zero out the descriptor ring */
1870
1871         memset(tx_ring->desc, 0, tx_ring->size);
1872
1873         tx_ring->next_to_use = 0;
1874         tx_ring->next_to_clean = 0;
1875
1876         writel(0, adapter->hw.hw_addr + tx_ring->head);
1877         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1878 }
1879
1880 /**
1881  * igb_clean_all_tx_rings - Free Tx Buffers for all queues
1882  * @adapter: board private structure
1883  **/
1884 static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
1885 {
1886         int i;
1887
1888         for (i = 0; i < adapter->num_tx_queues; i++)
1889                 igb_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1890 }
1891
1892 /**
1893  * igb_free_rx_resources - Free Rx Resources
1894  * @adapter: board private structure
1895  * @rx_ring: ring to clean the resources from
1896  *
1897  * Free all receive software resources
1898  **/
1899 static void igb_free_rx_resources(struct igb_adapter *adapter,
1900                                   struct igb_ring *rx_ring)
1901 {
1902         struct pci_dev *pdev = adapter->pdev;
1903
1904         igb_clean_rx_ring(adapter, rx_ring);
1905
1906         vfree(rx_ring->buffer_info);
1907         rx_ring->buffer_info = NULL;
1908
1909         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1910
1911         rx_ring->desc = NULL;
1912 }
1913
1914 /**
1915  * igb_free_all_rx_resources - Free Rx Resources for All Queues
1916  * @adapter: board private structure
1917  *
1918  * Free all receive software resources
1919  **/
1920 static void igb_free_all_rx_resources(struct igb_adapter *adapter)
1921 {
1922         int i;
1923
1924         for (i = 0; i < adapter->num_rx_queues; i++)
1925                 igb_free_rx_resources(adapter, &adapter->rx_ring[i]);
1926 }
1927
1928 /**
1929  * igb_clean_rx_ring - Free Rx Buffers per Queue
1930  * @adapter: board private structure
1931  * @rx_ring: ring to free buffers from
1932  **/
1933 static void igb_clean_rx_ring(struct igb_adapter *adapter,
1934                               struct igb_ring *rx_ring)
1935 {
1936         struct igb_buffer *buffer_info;
1937         struct pci_dev *pdev = adapter->pdev;
1938         unsigned long size;
1939         unsigned int i;
1940
1941         if (!rx_ring->buffer_info)
1942                 return;
1943         /* Free all the Rx ring sk_buffs */
1944         for (i = 0; i < rx_ring->count; i++) {
1945                 buffer_info = &rx_ring->buffer_info[i];
1946                 if (buffer_info->dma) {
1947                         if (adapter->rx_ps_hdr_size)
1948                                 pci_unmap_single(pdev, buffer_info->dma,
1949                                                  adapter->rx_ps_hdr_size,
1950                                                  PCI_DMA_FROMDEVICE);
1951                         else
1952                                 pci_unmap_single(pdev, buffer_info->dma,
1953                                                  adapter->rx_buffer_len,
1954                                                  PCI_DMA_FROMDEVICE);
1955                         buffer_info->dma = 0;
1956                 }
1957
1958                 if (buffer_info->skb) {
1959                         dev_kfree_skb(buffer_info->skb);
1960                         buffer_info->skb = NULL;
1961                 }
1962                 if (buffer_info->page) {
1963                         pci_unmap_page(pdev, buffer_info->page_dma,
1964                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
1965                         put_page(buffer_info->page);
1966                         buffer_info->page = NULL;
1967                         buffer_info->page_dma = 0;
1968                 }
1969         }
1970
1971         /* there also may be some cached data from a chained receive */
1972         if (rx_ring->pending_skb) {
1973                 dev_kfree_skb(rx_ring->pending_skb);
1974                 rx_ring->pending_skb = NULL;
1975         }
1976
1977         size = sizeof(struct igb_buffer) * rx_ring->count;
1978         memset(rx_ring->buffer_info, 0, size);
1979
1980         /* Zero out the descriptor ring */
1981         memset(rx_ring->desc, 0, rx_ring->size);
1982
1983         rx_ring->next_to_clean = 0;
1984         rx_ring->next_to_use = 0;
1985
1986         writel(0, adapter->hw.hw_addr + rx_ring->head);
1987         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1988 }
1989
1990 /**
1991  * igb_clean_all_rx_rings - Free Rx Buffers for all queues
1992  * @adapter: board private structure
1993  **/
1994 static void igb_clean_all_rx_rings(struct igb_adapter *adapter)
1995 {
1996         int i;
1997
1998         for (i = 0; i < adapter->num_rx_queues; i++)
1999                 igb_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2000 }
2001
2002 /**
2003  * igb_set_mac - Change the Ethernet Address of the NIC
2004  * @netdev: network interface device structure
2005  * @p: pointer to an address structure
2006  *
2007  * Returns 0 on success, negative on failure
2008  **/
2009 static int igb_set_mac(struct net_device *netdev, void *p)
2010 {
2011         struct igb_adapter *adapter = netdev_priv(netdev);
2012         struct sockaddr *addr = p;
2013
2014         if (!is_valid_ether_addr(addr->sa_data))
2015                 return -EADDRNOTAVAIL;
2016
2017         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2018         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2019
2020         adapter->hw.mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2021
2022         return 0;
2023 }
2024
2025 /**
2026  * igb_set_multi - Multicast and Promiscuous mode set
2027  * @netdev: network interface device structure
2028  *
2029  * The set_multi entry point is called whenever the multicast address
2030  * list or the network interface flags are updated.  This routine is
2031  * responsible for configuring the hardware for proper multicast,
2032  * promiscuous mode, and all-multi behavior.
2033  **/
2034 static void igb_set_multi(struct net_device *netdev)
2035 {
2036         struct igb_adapter *adapter = netdev_priv(netdev);
2037         struct e1000_hw *hw = &adapter->hw;
2038         struct e1000_mac_info *mac = &hw->mac;
2039         struct dev_mc_list *mc_ptr;
2040         u8  *mta_list;
2041         u32 rctl;
2042         int i;
2043
2044         /* Check for Promiscuous and All Multicast modes */
2045
2046         rctl = rd32(E1000_RCTL);
2047
2048         if (netdev->flags & IFF_PROMISC)
2049                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2050         else if (netdev->flags & IFF_ALLMULTI) {
2051                 rctl |= E1000_RCTL_MPE;
2052                 rctl &= ~E1000_RCTL_UPE;
2053         } else
2054                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2055
2056         wr32(E1000_RCTL, rctl);
2057
2058         if (!netdev->mc_count) {
2059                 /* nothing to program, so clear mc list */
2060                 igb_update_mc_addr_list(hw, NULL, 0, 1,
2061                                           mac->rar_entry_count);
2062                 return;
2063         }
2064
2065         mta_list = kzalloc(netdev->mc_count * 6, GFP_ATOMIC);
2066         if (!mta_list)
2067                 return;
2068
2069         /* The shared function expects a packed array of only addresses. */
2070         mc_ptr = netdev->mc_list;
2071
2072         for (i = 0; i < netdev->mc_count; i++) {
2073                 if (!mc_ptr)
2074                         break;
2075                 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN);
2076                 mc_ptr = mc_ptr->next;
2077         }
2078         igb_update_mc_addr_list(hw, mta_list, i, 1, mac->rar_entry_count);
2079         kfree(mta_list);
2080 }
2081
2082 /* Need to wait a few seconds after link up to get diagnostic information from
2083  * the phy */
2084 static void igb_update_phy_info(unsigned long data)
2085 {
2086         struct igb_adapter *adapter = (struct igb_adapter *) data;
2087         adapter->hw.phy.ops.get_phy_info(&adapter->hw);
2088 }
2089
2090 /**
2091  * igb_watchdog - Timer Call-back
2092  * @data: pointer to adapter cast into an unsigned long
2093  **/
2094 static void igb_watchdog(unsigned long data)
2095 {
2096         struct igb_adapter *adapter = (struct igb_adapter *)data;
2097         /* Do the rest outside of interrupt context */
2098         schedule_work(&adapter->watchdog_task);
2099 }
2100
2101 static void igb_watchdog_task(struct work_struct *work)
2102 {
2103         struct igb_adapter *adapter = container_of(work,
2104                                         struct igb_adapter, watchdog_task);
2105         struct e1000_hw *hw = &adapter->hw;
2106
2107         struct net_device *netdev = adapter->netdev;
2108         struct igb_ring *tx_ring = adapter->tx_ring;
2109         struct e1000_mac_info *mac = &adapter->hw.mac;
2110         u32 link;
2111         s32 ret_val;
2112
2113         if ((netif_carrier_ok(netdev)) &&
2114             (rd32(E1000_STATUS) & E1000_STATUS_LU))
2115                 goto link_up;
2116
2117         ret_val = hw->mac.ops.check_for_link(&adapter->hw);
2118         if ((ret_val == E1000_ERR_PHY) &&
2119             (hw->phy.type == e1000_phy_igp_3) &&
2120             (rd32(E1000_CTRL) &
2121              E1000_PHY_CTRL_GBE_DISABLE))
2122                 dev_info(&adapter->pdev->dev,
2123                          "Gigabit has been disabled, downgrading speed\n");
2124
2125         if ((hw->phy.media_type == e1000_media_type_internal_serdes) &&
2126             !(rd32(E1000_TXCW) & E1000_TXCW_ANE))
2127                 link = mac->serdes_has_link;
2128         else
2129                 link = rd32(E1000_STATUS) &
2130                                       E1000_STATUS_LU;
2131
2132         if (link) {
2133                 if (!netif_carrier_ok(netdev)) {
2134                         u32 ctrl;
2135                         hw->mac.ops.get_speed_and_duplex(&adapter->hw,
2136                                                    &adapter->link_speed,
2137                                                    &adapter->link_duplex);
2138
2139                         ctrl = rd32(E1000_CTRL);
2140                         dev_info(&adapter->pdev->dev,
2141                                  "NIC Link is Up %d Mbps %s, "
2142                                  "Flow Control: %s\n",
2143                                  adapter->link_speed,
2144                                  adapter->link_duplex == FULL_DUPLEX ?
2145                                  "Full Duplex" : "Half Duplex",
2146                                  ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2147                                  E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2148                                  E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2149                                  E1000_CTRL_TFCE) ? "TX" : "None")));
2150
2151                         /* tweak tx_queue_len according to speed/duplex and
2152                          * adjust the timeout factor */
2153                         netdev->tx_queue_len = adapter->tx_queue_len;
2154                         adapter->tx_timeout_factor = 1;
2155                         switch (adapter->link_speed) {
2156                         case SPEED_10:
2157                                 netdev->tx_queue_len = 10;
2158                                 adapter->tx_timeout_factor = 14;
2159                                 break;
2160                         case SPEED_100:
2161                                 netdev->tx_queue_len = 100;
2162                                 /* maybe add some timeout factor ? */
2163                                 break;
2164                         }
2165
2166                         netif_carrier_on(netdev);
2167                         netif_wake_queue(netdev);
2168
2169                         if (!test_bit(__IGB_DOWN, &adapter->state))
2170                                 mod_timer(&adapter->phy_info_timer,
2171                                           round_jiffies(jiffies + 2 * HZ));
2172                 }
2173         } else {
2174                 if (netif_carrier_ok(netdev)) {
2175                         adapter->link_speed = 0;
2176                         adapter->link_duplex = 0;
2177                         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2178                         netif_carrier_off(netdev);
2179                         netif_stop_queue(netdev);
2180                         if (!test_bit(__IGB_DOWN, &adapter->state))
2181                                 mod_timer(&adapter->phy_info_timer,
2182                                           round_jiffies(jiffies + 2 * HZ));
2183                 }
2184         }
2185
2186 link_up:
2187         igb_update_stats(adapter);
2188
2189         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2190         adapter->tpt_old = adapter->stats.tpt;
2191         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
2192         adapter->colc_old = adapter->stats.colc;
2193
2194         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
2195         adapter->gorc_old = adapter->stats.gorc;
2196         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
2197         adapter->gotc_old = adapter->stats.gotc;
2198
2199         igb_update_adaptive(&adapter->hw);
2200
2201         if (!netif_carrier_ok(netdev)) {
2202                 if (IGB_DESC_UNUSED(tx_ring) + 1 < tx_ring->count) {
2203                         /* We've lost link, so the controller stops DMA,
2204                          * but we've got queued Tx work that's never going
2205                          * to get done, so reset controller to flush Tx.
2206                          * (Do the reset outside of interrupt context). */
2207                         adapter->tx_timeout_count++;
2208                         schedule_work(&adapter->reset_task);
2209                 }
2210         }
2211
2212         /* Cause software interrupt to ensure rx ring is cleaned */
2213         wr32(E1000_ICS, E1000_ICS_RXDMT0);
2214
2215         /* Force detection of hung controller every watchdog period */
2216         tx_ring->detect_tx_hung = true;
2217
2218         /* Reset the timer */
2219         if (!test_bit(__IGB_DOWN, &adapter->state))
2220                 mod_timer(&adapter->watchdog_timer,
2221                           round_jiffies(jiffies + 2 * HZ));
2222 }
2223
2224 enum latency_range {
2225         lowest_latency = 0,
2226         low_latency = 1,
2227         bulk_latency = 2,
2228         latency_invalid = 255
2229 };
2230
2231
2232 static void igb_lower_rx_eitr(struct igb_adapter *adapter,
2233                               struct igb_ring *rx_ring)
2234 {
2235         struct e1000_hw *hw = &adapter->hw;
2236         int new_val;
2237
2238         new_val = rx_ring->itr_val / 2;
2239         if (new_val < IGB_MIN_DYN_ITR)
2240                 new_val = IGB_MIN_DYN_ITR;
2241
2242         if (new_val != rx_ring->itr_val) {
2243                 rx_ring->itr_val = new_val;
2244                 wr32(rx_ring->itr_register,
2245                                 1000000000 / (new_val * 256));
2246         }
2247 }
2248
2249 static void igb_raise_rx_eitr(struct igb_adapter *adapter,
2250                               struct igb_ring *rx_ring)
2251 {
2252         struct e1000_hw *hw = &adapter->hw;
2253         int new_val;
2254
2255         new_val = rx_ring->itr_val * 2;
2256         if (new_val > IGB_MAX_DYN_ITR)
2257                 new_val = IGB_MAX_DYN_ITR;
2258
2259         if (new_val != rx_ring->itr_val) {
2260                 rx_ring->itr_val = new_val;
2261                 wr32(rx_ring->itr_register,
2262                                 1000000000 / (new_val * 256));
2263         }
2264 }
2265
2266 /**
2267  * igb_update_itr - update the dynamic ITR value based on statistics
2268  *      Stores a new ITR value based on packets and byte
2269  *      counts during the last interrupt.  The advantage of per interrupt
2270  *      computation is faster updates and more accurate ITR for the current
2271  *      traffic pattern.  Constants in this function were computed
2272  *      based on theoretical maximum wire speed and thresholds were set based
2273  *      on testing data as well as attempting to minimize response time
2274  *      while increasing bulk throughput.
2275  *      this functionality is controlled by the InterruptThrottleRate module
2276  *      parameter (see igb_param.c)
2277  *      NOTE:  These calculations are only valid when operating in a single-
2278  *             queue environment.
2279  * @adapter: pointer to adapter
2280  * @itr_setting: current adapter->itr
2281  * @packets: the number of packets during this measurement interval
2282  * @bytes: the number of bytes during this measurement interval
2283  **/
2284 static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting,
2285                                    int packets, int bytes)
2286 {
2287         unsigned int retval = itr_setting;
2288
2289         if (packets == 0)
2290                 goto update_itr_done;
2291
2292         switch (itr_setting) {
2293         case lowest_latency:
2294                 /* handle TSO and jumbo frames */
2295                 if (bytes/packets > 8000)
2296                         retval = bulk_latency;
2297                 else if ((packets < 5) && (bytes > 512))
2298                         retval = low_latency;
2299                 break;
2300         case low_latency:  /* 50 usec aka 20000 ints/s */
2301                 if (bytes > 10000) {
2302                         /* this if handles the TSO accounting */
2303                         if (bytes/packets > 8000) {
2304                                 retval = bulk_latency;
2305                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
2306                                 retval = bulk_latency;
2307                         } else if ((packets > 35)) {
2308                                 retval = lowest_latency;
2309                         }
2310                 } else if (bytes/packets > 2000) {
2311                         retval = bulk_latency;
2312                 } else if (packets <= 2 && bytes < 512) {
2313                         retval = lowest_latency;
2314                 }
2315                 break;
2316         case bulk_latency: /* 250 usec aka 4000 ints/s */
2317                 if (bytes > 25000) {
2318                         if (packets > 35)
2319                                 retval = low_latency;
2320                 } else if (bytes < 6000) {
2321                         retval = low_latency;
2322                 }
2323                 break;
2324         }
2325
2326 update_itr_done:
2327         return retval;
2328 }
2329
2330 static void igb_set_itr(struct igb_adapter *adapter, u16 itr_register,
2331                         int rx_only)
2332 {
2333         u16 current_itr;
2334         u32 new_itr = adapter->itr;
2335
2336         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2337         if (adapter->link_speed != SPEED_1000) {
2338                 current_itr = 0;
2339                 new_itr = 4000;
2340                 goto set_itr_now;
2341         }
2342
2343         adapter->rx_itr = igb_update_itr(adapter,
2344                                     adapter->rx_itr,
2345                                     adapter->rx_ring->total_packets,
2346                                     adapter->rx_ring->total_bytes);
2347         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2348         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2349                 adapter->rx_itr = low_latency;
2350
2351         if (!rx_only) {
2352                 adapter->tx_itr = igb_update_itr(adapter,
2353                                             adapter->tx_itr,
2354                                             adapter->tx_ring->total_packets,
2355                                             adapter->tx_ring->total_bytes);
2356                 /* conservative mode (itr 3) eliminates the
2357                  * lowest_latency setting */
2358                 if (adapter->itr_setting == 3 &&
2359                     adapter->tx_itr == lowest_latency)
2360                         adapter->tx_itr = low_latency;
2361
2362                 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2363         } else {
2364                 current_itr = adapter->rx_itr;
2365         }
2366
2367         switch (current_itr) {
2368         /* counts and packets in update_itr are dependent on these numbers */
2369         case lowest_latency:
2370                 new_itr = 70000;
2371                 break;
2372         case low_latency:
2373                 new_itr = 20000; /* aka hwitr = ~200 */
2374                 break;
2375         case bulk_latency:
2376                 new_itr = 4000;
2377                 break;
2378         default:
2379                 break;
2380         }
2381
2382 set_itr_now:
2383         if (new_itr != adapter->itr) {
2384                 /* this attempts to bias the interrupt rate towards Bulk
2385                  * by adding intermediate steps when interrupt rate is
2386                  * increasing */
2387                 new_itr = new_itr > adapter->itr ?
2388                              min(adapter->itr + (new_itr >> 2), new_itr) :
2389                              new_itr;
2390                 /* Don't write the value here; it resets the adapter's
2391                  * internal timer, and causes us to delay far longer than
2392                  * we should between interrupts.  Instead, we write the ITR
2393                  * value at the beginning of the next interrupt so the timing
2394                  * ends up being correct.
2395                  */
2396                 adapter->itr = new_itr;
2397                 adapter->set_itr = 1;
2398         }
2399
2400         return;
2401 }
2402
2403
2404 #define IGB_TX_FLAGS_CSUM               0x00000001
2405 #define IGB_TX_FLAGS_VLAN               0x00000002
2406 #define IGB_TX_FLAGS_TSO                0x00000004
2407 #define IGB_TX_FLAGS_IPV4               0x00000008
2408 #define IGB_TX_FLAGS_VLAN_MASK  0xffff0000
2409 #define IGB_TX_FLAGS_VLAN_SHIFT 16
2410
2411 static inline int igb_tso_adv(struct igb_adapter *adapter,
2412                               struct igb_ring *tx_ring,
2413                               struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2414 {
2415         struct e1000_adv_tx_context_desc *context_desc;
2416         unsigned int i;
2417         int err;
2418         struct igb_buffer *buffer_info;
2419         u32 info = 0, tu_cmd = 0;
2420         u32 mss_l4len_idx, l4len;
2421         *hdr_len = 0;
2422
2423         if (skb_header_cloned(skb)) {
2424                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2425                 if (err)
2426                         return err;
2427         }
2428
2429         l4len = tcp_hdrlen(skb);
2430         *hdr_len += l4len;
2431
2432         if (skb->protocol == htons(ETH_P_IP)) {
2433                 struct iphdr *iph = ip_hdr(skb);
2434                 iph->tot_len = 0;
2435                 iph->check = 0;
2436                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2437                                                          iph->daddr, 0,
2438                                                          IPPROTO_TCP,
2439                                                          0);
2440         } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2441                 ipv6_hdr(skb)->payload_len = 0;
2442                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2443                                                        &ipv6_hdr(skb)->daddr,
2444                                                        0, IPPROTO_TCP, 0);
2445         }
2446
2447         i = tx_ring->next_to_use;
2448
2449         buffer_info = &tx_ring->buffer_info[i];
2450         context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
2451         /* VLAN MACLEN IPLEN */
2452         if (tx_flags & IGB_TX_FLAGS_VLAN)
2453                 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
2454         info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2455         *hdr_len += skb_network_offset(skb);
2456         info |= skb_network_header_len(skb);
2457         *hdr_len += skb_network_header_len(skb);
2458         context_desc->vlan_macip_lens = cpu_to_le32(info);
2459
2460         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2461         tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2462
2463         if (skb->protocol == htons(ETH_P_IP))
2464                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2465         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2466
2467         context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2468
2469         /* MSS L4LEN IDX */
2470         mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
2471         mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
2472
2473         /* Context index must be unique per ring.  Luckily, so is the interrupt
2474          * mask value. */
2475         mss_l4len_idx |= tx_ring->eims_value >> 4;
2476
2477         context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2478         context_desc->seqnum_seed = 0;
2479
2480         buffer_info->time_stamp = jiffies;
2481         buffer_info->dma = 0;
2482         i++;
2483         if (i == tx_ring->count)
2484                 i = 0;
2485
2486         tx_ring->next_to_use = i;
2487
2488         return true;
2489 }
2490
2491 static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
2492                                         struct igb_ring *tx_ring,
2493                                         struct sk_buff *skb, u32 tx_flags)
2494 {
2495         struct e1000_adv_tx_context_desc *context_desc;
2496         unsigned int i;
2497         struct igb_buffer *buffer_info;
2498         u32 info = 0, tu_cmd = 0;
2499
2500         if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2501             (tx_flags & IGB_TX_FLAGS_VLAN)) {
2502                 i = tx_ring->next_to_use;
2503                 buffer_info = &tx_ring->buffer_info[i];
2504                 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
2505
2506                 if (tx_flags & IGB_TX_FLAGS_VLAN)
2507                         info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
2508                 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2509                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2510                         info |= skb_network_header_len(skb);
2511
2512                 context_desc->vlan_macip_lens = cpu_to_le32(info);
2513
2514                 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2515
2516                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2517                         if (skb->protocol == htons(ETH_P_IP))
2518                                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2519                         if (skb->sk && (skb->sk->sk_protocol == IPPROTO_TCP))
2520                                 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2521                 }
2522
2523                 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2524                 context_desc->seqnum_seed = 0;
2525                 context_desc->mss_l4len_idx =
2526                                           cpu_to_le32(tx_ring->eims_value >> 4);
2527
2528                 buffer_info->time_stamp = jiffies;
2529                 buffer_info->dma = 0;
2530
2531                 i++;
2532                 if (i == tx_ring->count)
2533                         i = 0;
2534                 tx_ring->next_to_use = i;
2535
2536                 return true;
2537         }
2538
2539
2540         return false;
2541 }
2542
2543 #define IGB_MAX_TXD_PWR 16
2544 #define IGB_MAX_DATA_PER_TXD    (1<<IGB_MAX_TXD_PWR)
2545
2546 static inline int igb_tx_map_adv(struct igb_adapter *adapter,
2547                                  struct igb_ring *tx_ring,
2548                                  struct sk_buff *skb)
2549 {
2550         struct igb_buffer *buffer_info;
2551         unsigned int len = skb_headlen(skb);
2552         unsigned int count = 0, i;
2553         unsigned int f;
2554
2555         i = tx_ring->next_to_use;
2556
2557         buffer_info = &tx_ring->buffer_info[i];
2558         BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
2559         buffer_info->length = len;
2560         /* set time_stamp *before* dma to help avoid a possible race */
2561         buffer_info->time_stamp = jiffies;
2562         buffer_info->dma = pci_map_single(adapter->pdev, skb->data, len,
2563                                           PCI_DMA_TODEVICE);
2564         count++;
2565         i++;
2566         if (i == tx_ring->count)
2567                 i = 0;
2568
2569         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2570                 struct skb_frag_struct *frag;
2571
2572                 frag = &skb_shinfo(skb)->frags[f];
2573                 len = frag->size;
2574
2575                 buffer_info = &tx_ring->buffer_info[i];
2576                 BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
2577                 buffer_info->length = len;
2578                 buffer_info->time_stamp = jiffies;
2579                 buffer_info->dma = pci_map_page(adapter->pdev,
2580                                                 frag->page,
2581                                                 frag->page_offset,
2582                                                 len,
2583                                                 PCI_DMA_TODEVICE);
2584
2585                 count++;
2586                 i++;
2587                 if (i == tx_ring->count)
2588                         i = 0;
2589         }
2590
2591         i = (i == 0) ? tx_ring->count - 1 : i - 1;
2592         tx_ring->buffer_info[i].skb = skb;
2593
2594         return count;
2595 }
2596
2597 static inline void igb_tx_queue_adv(struct igb_adapter *adapter,
2598                                     struct igb_ring *tx_ring,
2599                                     int tx_flags, int count, u32 paylen,
2600                                     u8 hdr_len)
2601 {
2602         union e1000_adv_tx_desc *tx_desc = NULL;
2603         struct igb_buffer *buffer_info;
2604         u32 olinfo_status = 0, cmd_type_len;
2605         unsigned int i;
2606
2607         cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2608                         E1000_ADVTXD_DCMD_DEXT);
2609
2610         if (tx_flags & IGB_TX_FLAGS_VLAN)
2611                 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2612
2613         if (tx_flags & IGB_TX_FLAGS_TSO) {
2614                 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2615
2616                 /* insert tcp checksum */
2617                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2618
2619                 /* insert ip checksum */
2620                 if (tx_flags & IGB_TX_FLAGS_IPV4)
2621                         olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2622
2623         } else if (tx_flags & IGB_TX_FLAGS_CSUM) {
2624                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2625         }
2626
2627         if (tx_flags & (IGB_TX_FLAGS_CSUM | IGB_TX_FLAGS_TSO |
2628                         IGB_TX_FLAGS_VLAN))
2629                 olinfo_status |= tx_ring->eims_value >> 4;
2630
2631         olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2632
2633         i = tx_ring->next_to_use;
2634         while (count--) {
2635                 buffer_info = &tx_ring->buffer_info[i];
2636                 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
2637                 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2638                 tx_desc->read.cmd_type_len =
2639                         cpu_to_le32(cmd_type_len | buffer_info->length);
2640                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2641                 i++;
2642                 if (i == tx_ring->count)
2643                         i = 0;
2644         }
2645
2646         tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2647         /* Force memory writes to complete before letting h/w
2648          * know there are new descriptors to fetch.  (Only
2649          * applicable for weak-ordered memory model archs,
2650          * such as IA-64). */
2651         wmb();
2652
2653         tx_ring->next_to_use = i;
2654         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2655         /* we need this if more than one processor can write to our tail
2656          * at a time, it syncronizes IO on IA64/Altix systems */
2657         mmiowb();
2658 }
2659
2660 static int __igb_maybe_stop_tx(struct net_device *netdev,
2661                                struct igb_ring *tx_ring, int size)
2662 {
2663         struct igb_adapter *adapter = netdev_priv(netdev);
2664
2665         netif_stop_queue(netdev);
2666         /* Herbert's original patch had:
2667          *  smp_mb__after_netif_stop_queue();
2668          * but since that doesn't exist yet, just open code it. */
2669         smp_mb();
2670
2671         /* We need to check again in a case another CPU has just
2672          * made room available. */
2673         if (IGB_DESC_UNUSED(tx_ring) < size)
2674                 return -EBUSY;
2675
2676         /* A reprieve! */
2677         netif_start_queue(netdev);
2678         ++adapter->restart_queue;
2679         return 0;
2680 }
2681
2682 static int igb_maybe_stop_tx(struct net_device *netdev,
2683                              struct igb_ring *tx_ring, int size)
2684 {
2685         if (IGB_DESC_UNUSED(tx_ring) >= size)
2686                 return 0;
2687         return __igb_maybe_stop_tx(netdev, tx_ring, size);
2688 }
2689
2690 #define TXD_USE_COUNT(S) (((S) >> (IGB_MAX_TXD_PWR)) + 1)
2691
2692 static int igb_xmit_frame_ring_adv(struct sk_buff *skb,
2693                                    struct net_device *netdev,
2694                                    struct igb_ring *tx_ring)
2695 {
2696         struct igb_adapter *adapter = netdev_priv(netdev);
2697         unsigned int tx_flags = 0;
2698         unsigned int len;
2699         unsigned long irq_flags;
2700         u8 hdr_len = 0;
2701         int tso = 0;
2702
2703         len = skb_headlen(skb);
2704
2705         if (test_bit(__IGB_DOWN, &adapter->state)) {
2706                 dev_kfree_skb_any(skb);
2707                 return NETDEV_TX_OK;
2708         }
2709
2710         if (skb->len <= 0) {
2711                 dev_kfree_skb_any(skb);
2712                 return NETDEV_TX_OK;
2713         }
2714
2715         if (!spin_trylock_irqsave(&tx_ring->tx_lock, irq_flags))
2716                 /* Collision - tell upper layer to requeue */
2717                 return NETDEV_TX_LOCKED;
2718
2719         /* need: 1 descriptor per page,
2720          *       + 2 desc gap to keep tail from touching head,
2721          *       + 1 desc for skb->data,
2722          *       + 1 desc for context descriptor,
2723          * otherwise try next time */
2724         if (igb_maybe_stop_tx(netdev, tx_ring, skb_shinfo(skb)->nr_frags + 4)) {
2725                 /* this is a hard error */
2726                 spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags);
2727                 return NETDEV_TX_BUSY;
2728         }
2729
2730         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2731                 tx_flags |= IGB_TX_FLAGS_VLAN;
2732                 tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT);
2733         }
2734
2735         tso = skb_is_gso(skb) ? igb_tso_adv(adapter, tx_ring, skb, tx_flags,
2736                                               &hdr_len) : 0;
2737
2738         if (tso < 0) {
2739                 dev_kfree_skb_any(skb);
2740                 spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags);
2741                 return NETDEV_TX_OK;
2742         }
2743
2744         if (tso)
2745                 tx_flags |= IGB_TX_FLAGS_TSO;
2746         else if (igb_tx_csum_adv(adapter, tx_ring, skb, tx_flags))
2747                         if (skb->ip_summed == CHECKSUM_PARTIAL)
2748                                 tx_flags |= IGB_TX_FLAGS_CSUM;
2749
2750         if (skb->protocol == htons(ETH_P_IP))
2751                 tx_flags |= IGB_TX_FLAGS_IPV4;
2752
2753         igb_tx_queue_adv(adapter, tx_ring, tx_flags,
2754                          igb_tx_map_adv(adapter, tx_ring, skb),
2755                          skb->len, hdr_len);
2756
2757         netdev->trans_start = jiffies;
2758
2759         /* Make sure there is space in the ring for the next send. */
2760         igb_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 4);
2761
2762         spin_unlock_irqrestore(&tx_ring->tx_lock, irq_flags);
2763         return NETDEV_TX_OK;
2764 }
2765
2766 static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *netdev)
2767 {
2768         struct igb_adapter *adapter = netdev_priv(netdev);
2769         struct igb_ring *tx_ring = &adapter->tx_ring[0];
2770
2771         /* This goes back to the question of how to logically map a tx queue
2772          * to a flow.  Right now, performance is impacted slightly negatively
2773          * if using multiple tx queues.  If the stack breaks away from a
2774          * single qdisc implementation, we can look at this again. */
2775         return (igb_xmit_frame_ring_adv(skb, netdev, tx_ring));
2776 }
2777
2778 /**
2779  * igb_tx_timeout - Respond to a Tx Hang
2780  * @netdev: network interface device structure
2781  **/
2782 static void igb_tx_timeout(struct net_device *netdev)
2783 {
2784         struct igb_adapter *adapter = netdev_priv(netdev);
2785         struct e1000_hw *hw = &adapter->hw;
2786
2787         /* Do the reset outside of interrupt context */
2788         adapter->tx_timeout_count++;
2789         schedule_work(&adapter->reset_task);
2790         wr32(E1000_EICS, adapter->eims_enable_mask &
2791                 ~(E1000_EIMS_TCP_TIMER | E1000_EIMS_OTHER));
2792 }
2793
2794 static void igb_reset_task(struct work_struct *work)
2795 {
2796         struct igb_adapter *adapter;
2797         adapter = container_of(work, struct igb_adapter, reset_task);
2798
2799         igb_reinit_locked(adapter);
2800 }
2801
2802 /**
2803  * igb_get_stats - Get System Network Statistics
2804  * @netdev: network interface device structure
2805  *
2806  * Returns the address of the device statistics structure.
2807  * The statistics are actually updated from the timer callback.
2808  **/
2809 static struct net_device_stats *
2810 igb_get_stats(struct net_device *netdev)
2811 {
2812         struct igb_adapter *adapter = netdev_priv(netdev);
2813
2814         /* only return the current stats */
2815         return &adapter->net_stats;
2816 }
2817
2818 /**
2819  * igb_change_mtu - Change the Maximum Transfer Unit
2820  * @netdev: network interface device structure
2821  * @new_mtu: new value for maximum frame size
2822  *
2823  * Returns 0 on success, negative on failure
2824  **/
2825 static int igb_change_mtu(struct net_device *netdev, int new_mtu)
2826 {
2827         struct igb_adapter *adapter = netdev_priv(netdev);
2828         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2829
2830         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2831             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2832                 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2833                 return -EINVAL;
2834         }
2835
2836 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2837         if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2838                 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2839                 return -EINVAL;
2840         }
2841
2842         while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
2843                 msleep(1);
2844         /* igb_down has a dependency on max_frame_size */
2845         adapter->max_frame_size = max_frame;
2846         if (netif_running(netdev))
2847                 igb_down(adapter);
2848
2849         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2850          * means we reserve 2 more, this pushes us to allocate from the next
2851          * larger slab size.
2852          * i.e. RXBUFFER_2048 --> size-4096 slab
2853          */
2854
2855         if (max_frame <= IGB_RXBUFFER_256)
2856                 adapter->rx_buffer_len = IGB_RXBUFFER_256;
2857         else if (max_frame <= IGB_RXBUFFER_512)
2858                 adapter->rx_buffer_len = IGB_RXBUFFER_512;
2859         else if (max_frame <= IGB_RXBUFFER_1024)
2860                 adapter->rx_buffer_len = IGB_RXBUFFER_1024;
2861         else if (max_frame <= IGB_RXBUFFER_2048)
2862                 adapter->rx_buffer_len = IGB_RXBUFFER_2048;
2863         else
2864                 adapter->rx_buffer_len = IGB_RXBUFFER_4096;
2865         /* adjust allocation if LPE protects us, and we aren't using SBP */
2866         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2867              (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))
2868                 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2869
2870         dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2871                  netdev->mtu, new_mtu);
2872         netdev->mtu = new_mtu;
2873
2874         if (netif_running(netdev))
2875                 igb_up(adapter);
2876         else
2877                 igb_reset(adapter);
2878
2879         clear_bit(__IGB_RESETTING, &adapter->state);
2880
2881         return 0;
2882 }
2883
2884 /**
2885  * igb_update_stats - Update the board statistics counters
2886  * @adapter: board private structure
2887  **/
2888
2889 void igb_update_stats(struct igb_adapter *adapter)
2890 {
2891         struct e1000_hw *hw = &adapter->hw;
2892         struct pci_dev *pdev = adapter->pdev;
2893         u16 phy_tmp;
2894
2895 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2896
2897         /*
2898          * Prevent stats update while adapter is being reset, or if the pci
2899          * connection is down.
2900          */
2901         if (adapter->link_speed == 0)
2902                 return;
2903         if (pci_channel_offline(pdev))
2904                 return;
2905
2906         adapter->stats.crcerrs += rd32(E1000_CRCERRS);
2907         adapter->stats.gprc += rd32(E1000_GPRC);
2908         adapter->stats.gorc += rd32(E1000_GORCL);
2909         rd32(E1000_GORCH); /* clear GORCL */
2910         adapter->stats.bprc += rd32(E1000_BPRC);
2911         adapter->stats.mprc += rd32(E1000_MPRC);
2912         adapter->stats.roc += rd32(E1000_ROC);
2913
2914         adapter->stats.prc64 += rd32(E1000_PRC64);
2915         adapter->stats.prc127 += rd32(E1000_PRC127);
2916         adapter->stats.prc255 += rd32(E1000_PRC255);
2917         adapter->stats.prc511 += rd32(E1000_PRC511);
2918         adapter->stats.prc1023 += rd32(E1000_PRC1023);
2919         adapter->stats.prc1522 += rd32(E1000_PRC1522);
2920         adapter->stats.symerrs += rd32(E1000_SYMERRS);
2921         adapter->stats.sec += rd32(E1000_SEC);
2922
2923         adapter->stats.mpc += rd32(E1000_MPC);
2924         adapter->stats.scc += rd32(E1000_SCC);
2925         adapter->stats.ecol += rd32(E1000_ECOL);
2926         adapter->stats.mcc += rd32(E1000_MCC);
2927         adapter->stats.latecol += rd32(E1000_LATECOL);
2928         adapter->stats.dc += rd32(E1000_DC);
2929         adapter->stats.rlec += rd32(E1000_RLEC);
2930         adapter->stats.xonrxc += rd32(E1000_XONRXC);
2931         adapter->stats.xontxc += rd32(E1000_XONTXC);
2932         adapter->stats.xoffrxc += rd32(E1000_XOFFRXC);
2933         adapter->stats.xofftxc += rd32(E1000_XOFFTXC);
2934         adapter->stats.fcruc += rd32(E1000_FCRUC);
2935         adapter->stats.gptc += rd32(E1000_GPTC);
2936         adapter->stats.gotc += rd32(E1000_GOTCL);
2937         rd32(E1000_GOTCH); /* clear GOTCL */
2938         adapter->stats.rnbc += rd32(E1000_RNBC);
2939         adapter->stats.ruc += rd32(E1000_RUC);
2940         adapter->stats.rfc += rd32(E1000_RFC);
2941         adapter->stats.rjc += rd32(E1000_RJC);
2942         adapter->stats.tor += rd32(E1000_TORH);
2943         adapter->stats.tot += rd32(E1000_TOTH);
2944         adapter->stats.tpr += rd32(E1000_TPR);
2945
2946         adapter->stats.ptc64 += rd32(E1000_PTC64);
2947         adapter->stats.ptc127 += rd32(E1000_PTC127);
2948         adapter->stats.ptc255 += rd32(E1000_PTC255);
2949         adapter->stats.ptc511 += rd32(E1000_PTC511);
2950         adapter->stats.ptc1023 += rd32(E1000_PTC1023);
2951         adapter->stats.ptc1522 += rd32(E1000_PTC1522);
2952
2953         adapter->stats.mptc += rd32(E1000_MPTC);
2954         adapter->stats.bptc += rd32(E1000_BPTC);
2955
2956         /* used for adaptive IFS */
2957
2958         hw->mac.tx_packet_delta = rd32(E1000_TPT);
2959         adapter->stats.tpt += hw->mac.tx_packet_delta;
2960         hw->mac.collision_delta = rd32(E1000_COLC);
2961         adapter->stats.colc += hw->mac.collision_delta;
2962
2963         adapter->stats.algnerrc += rd32(E1000_ALGNERRC);
2964         adapter->stats.rxerrc += rd32(E1000_RXERRC);
2965         adapter->stats.tncrs += rd32(E1000_TNCRS);
2966         adapter->stats.tsctc += rd32(E1000_TSCTC);
2967         adapter->stats.tsctfc += rd32(E1000_TSCTFC);
2968
2969         adapter->stats.iac += rd32(E1000_IAC);
2970         adapter->stats.icrxoc += rd32(E1000_ICRXOC);
2971         adapter->stats.icrxptc += rd32(E1000_ICRXPTC);
2972         adapter->stats.icrxatc += rd32(E1000_ICRXATC);
2973         adapter->stats.ictxptc += rd32(E1000_ICTXPTC);
2974         adapter->stats.ictxatc += rd32(E1000_ICTXATC);
2975         adapter->stats.ictxqec += rd32(E1000_ICTXQEC);
2976         adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC);
2977         adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC);
2978
2979         /* Fill out the OS statistics structure */
2980         adapter->net_stats.multicast = adapter->stats.mprc;
2981         adapter->net_stats.collisions = adapter->stats.colc;
2982
2983         /* Rx Errors */
2984
2985         /* RLEC on some newer hardware can be incorrect so build
2986         * our own version based on RUC and ROC */
2987         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
2988                 adapter->stats.crcerrs + adapter->stats.algnerrc +
2989                 adapter->stats.ruc + adapter->stats.roc +
2990                 adapter->stats.cexterr;
2991         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
2992                                               adapter->stats.roc;
2993         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2994         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
2995         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
2996
2997         /* Tx Errors */
2998         adapter->net_stats.tx_errors = adapter->stats.ecol +
2999                                        adapter->stats.latecol;
3000         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3001         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3002         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3003
3004         /* Tx Dropped needs to be maintained elsewhere */
3005
3006         /* Phy Stats */
3007         if (hw->phy.media_type == e1000_media_type_copper) {
3008                 if ((adapter->link_speed == SPEED_1000) &&
3009                    (!hw->phy.ops.read_phy_reg(hw, PHY_1000T_STATUS,
3010                                               &phy_tmp))) {
3011                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3012                         adapter->phy_stats.idle_errors += phy_tmp;
3013                 }
3014         }
3015
3016         /* Management Stats */
3017         adapter->stats.mgptc += rd32(E1000_MGTPTC);
3018         adapter->stats.mgprc += rd32(E1000_MGTPRC);
3019         adapter->stats.mgpdc += rd32(E1000_MGTPDC);
3020 }
3021
3022
3023 static irqreturn_t igb_msix_other(int irq, void *data)
3024 {
3025         struct net_device *netdev = data;
3026         struct igb_adapter *adapter = netdev_priv(netdev);
3027         struct e1000_hw *hw = &adapter->hw;
3028         u32 eicr;
3029         /* disable interrupts from the "other" bit, avoid re-entry */
3030         wr32(E1000_EIMC, E1000_EIMS_OTHER);
3031
3032         eicr = rd32(E1000_EICR);
3033
3034         if (eicr & E1000_EIMS_OTHER) {
3035                 u32 icr = rd32(E1000_ICR);
3036                 /* reading ICR causes bit 31 of EICR to be cleared */
3037                 if (!(icr & E1000_ICR_LSC))
3038                         goto no_link_interrupt;
3039                 hw->mac.get_link_status = 1;
3040                 /* guard against interrupt when we're going down */
3041                 if (!test_bit(__IGB_DOWN, &adapter->state))
3042                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3043         }
3044
3045 no_link_interrupt:
3046         wr32(E1000_IMS, E1000_IMS_LSC);
3047         wr32(E1000_EIMS, E1000_EIMS_OTHER);
3048
3049         return IRQ_HANDLED;
3050 }
3051
3052 static irqreturn_t igb_msix_tx(int irq, void *data)
3053 {
3054         struct igb_ring *tx_ring = data;
3055         struct igb_adapter *adapter = tx_ring->adapter;
3056         struct e1000_hw *hw = &adapter->hw;
3057
3058         if (!tx_ring->itr_val)
3059                 wr32(E1000_EIMC, tx_ring->eims_value);
3060
3061         tx_ring->total_bytes = 0;
3062         tx_ring->total_packets = 0;
3063         if (!igb_clean_tx_irq(adapter, tx_ring))
3064                 /* Ring was not completely cleaned, so fire another interrupt */
3065                 wr32(E1000_EICS, tx_ring->eims_value);
3066
3067         if (!tx_ring->itr_val)
3068                 wr32(E1000_EIMS, tx_ring->eims_value);
3069         return IRQ_HANDLED;
3070 }
3071
3072 static irqreturn_t igb_msix_rx(int irq, void *data)
3073 {
3074         struct igb_ring *rx_ring = data;
3075         struct igb_adapter *adapter = rx_ring->adapter;
3076         struct e1000_hw *hw = &adapter->hw;
3077
3078         if (!rx_ring->itr_val)
3079                 wr32(E1000_EIMC, rx_ring->eims_value);
3080
3081         if (netif_rx_schedule_prep(adapter->netdev, &rx_ring->napi)) {
3082                 rx_ring->total_bytes = 0;
3083                 rx_ring->total_packets = 0;
3084                 rx_ring->no_itr_adjust = 0;
3085                 __netif_rx_schedule(adapter->netdev, &rx_ring->napi);
3086         } else {
3087                 if (!rx_ring->no_itr_adjust) {
3088                         igb_lower_rx_eitr(adapter, rx_ring);
3089                         rx_ring->no_itr_adjust = 1;
3090                 }
3091         }
3092
3093         return IRQ_HANDLED;
3094 }
3095
3096
3097 /**
3098  * igb_intr_msi - Interrupt Handler
3099  * @irq: interrupt number
3100  * @data: pointer to a network interface device structure
3101  **/
3102 static irqreturn_t igb_intr_msi(int irq, void *data)
3103 {
3104         struct net_device *netdev = data;
3105         struct igb_adapter *adapter = netdev_priv(netdev);
3106         struct napi_struct *napi = &adapter->napi;
3107         struct e1000_hw *hw = &adapter->hw;
3108         /* read ICR disables interrupts using IAM */
3109         u32 icr = rd32(E1000_ICR);
3110
3111         /* Write the ITR value calculated at the end of the
3112          * previous interrupt.
3113          */
3114         if (adapter->set_itr) {
3115                 wr32(E1000_ITR,
3116                         1000000000 / (adapter->itr * 256));
3117                 adapter->set_itr = 0;
3118         }
3119
3120         /* read ICR disables interrupts using IAM */
3121         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3122                 hw->mac.get_link_status = 1;
3123                 if (!test_bit(__IGB_DOWN, &adapter->state))
3124                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3125         }
3126
3127         if (netif_rx_schedule_prep(netdev, napi)) {
3128                 adapter->tx_ring->total_bytes = 0;
3129                 adapter->tx_ring->total_packets = 0;
3130                 adapter->rx_ring->total_bytes = 0;
3131                 adapter->rx_ring->total_packets = 0;
3132                 __netif_rx_schedule(netdev, napi);
3133         }
3134
3135         return IRQ_HANDLED;
3136 }
3137
3138 /**
3139  * igb_intr - Interrupt Handler
3140  * @irq: interrupt number
3141  * @data: pointer to a network interface device structure
3142  **/
3143 static irqreturn_t igb_intr(int irq, void *data)
3144 {
3145         struct net_device *netdev = data;
3146         struct igb_adapter *adapter = netdev_priv(netdev);
3147         struct napi_struct *napi = &adapter->napi;
3148         struct e1000_hw *hw = &adapter->hw;
3149         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
3150          * need for the IMC write */
3151         u32 icr = rd32(E1000_ICR);
3152         u32 eicr = 0;
3153         if (!icr)
3154                 return IRQ_NONE;  /* Not our interrupt */
3155
3156         /* Write the ITR value calculated at the end of the
3157          * previous interrupt.
3158          */
3159         if (adapter->set_itr) {
3160                 wr32(E1000_ITR,
3161                         1000000000 / (adapter->itr * 256));
3162                 adapter->set_itr = 0;
3163         }
3164
3165         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3166          * not set, then the adapter didn't send an interrupt */
3167         if (!(icr & E1000_ICR_INT_ASSERTED))
3168                 return IRQ_NONE;
3169
3170         eicr = rd32(E1000_EICR);
3171
3172         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3173                 hw->mac.get_link_status = 1;
3174                 /* guard against interrupt when we're going down */
3175                 if (!test_bit(__IGB_DOWN, &adapter->state))
3176                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3177         }
3178
3179         if (netif_rx_schedule_prep(netdev, napi)) {
3180                 adapter->tx_ring->total_bytes = 0;
3181                 adapter->rx_ring->total_bytes = 0;
3182                 adapter->tx_ring->total_packets = 0;
3183                 adapter->rx_ring->total_packets = 0;
3184                 __netif_rx_schedule(netdev, napi);
3185         }
3186
3187         return IRQ_HANDLED;
3188 }
3189
3190 /**
3191  * igb_clean - NAPI Rx polling callback
3192  * @adapter: board private structure
3193  **/
3194 static int igb_clean(struct napi_struct *napi, int budget)
3195 {
3196         struct igb_adapter *adapter = container_of(napi, struct igb_adapter,
3197                                                    napi);
3198         struct net_device *netdev = adapter->netdev;
3199         int tx_clean_complete = 1, work_done = 0;
3200         int i;
3201
3202         /* Must NOT use netdev_priv macro here. */
3203         adapter = netdev->priv;
3204
3205         /* Keep link state information with original netdev */
3206         if (!netif_carrier_ok(netdev))
3207                 goto quit_polling;
3208
3209         /* igb_clean is called per-cpu.  This lock protects tx_ring[i] from
3210          * being cleaned by multiple cpus simultaneously.  A failure obtaining
3211          * the lock means tx_ring[i] is currently being cleaned anyway. */
3212         for (i = 0; i < adapter->num_tx_queues; i++) {
3213                 if (spin_trylock(&adapter->tx_ring[i].tx_clean_lock)) {
3214                         tx_clean_complete &= igb_clean_tx_irq(adapter,
3215                                                         &adapter->tx_ring[i]);
3216                         spin_unlock(&adapter->tx_ring[i].tx_clean_lock);
3217                 }
3218         }
3219
3220         for (i = 0; i < adapter->num_rx_queues; i++)
3221                 igb_clean_rx_irq_adv(adapter, &adapter->rx_ring[i], &work_done,
3222                                      adapter->rx_ring[i].napi.weight);
3223
3224         /* If no Tx and not enough Rx work done, exit the polling mode */
3225         if ((tx_clean_complete && (work_done < budget)) ||
3226             !netif_running(netdev)) {
3227 quit_polling:
3228                 if (adapter->itr_setting & 3)
3229                         igb_set_itr(adapter, E1000_ITR, false);
3230                 netif_rx_complete(netdev, napi);
3231                 if (!test_bit(__IGB_DOWN, &adapter->state))
3232                         igb_irq_enable(adapter);
3233                 return 0;
3234         }
3235
3236         return 1;
3237 }
3238
3239 static int igb_clean_rx_ring_msix(struct napi_struct *napi, int budget)
3240 {
3241         struct igb_ring *rx_ring = container_of(napi, struct igb_ring, napi);
3242         struct igb_adapter *adapter = rx_ring->adapter;
3243         struct e1000_hw *hw = &adapter->hw;
3244         struct net_device *netdev = adapter->netdev;
3245         int work_done = 0;
3246
3247         /* Keep link state information with original netdev */
3248         if (!netif_carrier_ok(netdev))
3249                 goto quit_polling;
3250
3251         igb_clean_rx_irq_adv(adapter, rx_ring, &work_done, budget);
3252
3253
3254         /* If not enough Rx work done, exit the polling mode */
3255         if ((work_done == 0) || !netif_running(netdev)) {
3256 quit_polling:
3257                 netif_rx_complete(netdev, napi);
3258
3259                 wr32(E1000_EIMS, rx_ring->eims_value);
3260                 if ((adapter->itr_setting & 3) && !rx_ring->no_itr_adjust &&
3261                     (rx_ring->total_packets > IGB_DYN_ITR_PACKET_THRESHOLD)) {
3262                         int mean_size = rx_ring->total_bytes /
3263                                         rx_ring->total_packets;
3264                         if (mean_size < IGB_DYN_ITR_LENGTH_LOW)
3265                                 igb_raise_rx_eitr(adapter, rx_ring);
3266                         else if (mean_size > IGB_DYN_ITR_LENGTH_HIGH)
3267                                 igb_lower_rx_eitr(adapter, rx_ring);
3268                 }
3269                 return 0;
3270         }
3271
3272         return 1;
3273 }
3274 /**
3275  * igb_clean_tx_irq - Reclaim resources after transmit completes
3276  * @adapter: board private structure
3277  * returns true if ring is completely cleaned
3278  **/
3279 static bool igb_clean_tx_irq(struct igb_adapter *adapter,
3280                                   struct igb_ring *tx_ring)
3281 {
3282         struct net_device *netdev = adapter->netdev;
3283         struct e1000_hw *hw = &adapter->hw;
3284         struct e1000_tx_desc *tx_desc;
3285         struct igb_buffer *buffer_info;
3286         struct sk_buff *skb;
3287         unsigned int i;
3288         u32 head, oldhead;
3289         unsigned int count = 0;
3290         bool cleaned = false;
3291         bool retval = true;
3292         unsigned int total_bytes = 0, total_packets = 0;
3293
3294         rmb();
3295         head = *(volatile u32 *)((struct e1000_tx_desc *)tx_ring->desc
3296                                  + tx_ring->count);
3297         head = le32_to_cpu(head);
3298         i = tx_ring->next_to_clean;
3299         while (1) {
3300                 while (i != head) {
3301                         cleaned = true;
3302                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3303                         buffer_info = &tx_ring->buffer_info[i];
3304                         skb = buffer_info->skb;
3305
3306                         if (skb) {
3307                                 unsigned int segs, bytecount;
3308                                 /* gso_segs is currently only valid for tcp */
3309                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
3310                                 /* multiply data chunks by size of headers */
3311                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
3312                                             skb->len;
3313                                 total_packets += segs;
3314                                 total_bytes += bytecount;
3315                         }
3316
3317                         igb_unmap_and_free_tx_resource(adapter, buffer_info);
3318                         tx_desc->upper.data = 0;
3319
3320                         i++;
3321                         if (i == tx_ring->count)
3322                                 i = 0;
3323
3324                         count++;
3325                         if (count == IGB_MAX_TX_CLEAN) {
3326                                 retval = false;
3327                                 goto done_cleaning;
3328                         }
3329                 }
3330                 oldhead = head;
3331                 rmb();
3332                 head = *(volatile u32 *)((struct e1000_tx_desc *)tx_ring->desc
3333                                          + tx_ring->count);
3334                 head = le32_to_cpu(head);
3335                 if (head == oldhead)
3336                         goto done_cleaning;
3337         }  /* while (1) */
3338
3339 done_cleaning:
3340         tx_ring->next_to_clean = i;
3341
3342         if (unlikely(cleaned &&
3343                      netif_carrier_ok(netdev) &&
3344                      IGB_DESC_UNUSED(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
3345                 /* Make sure that anybody stopping the queue after this
3346                  * sees the new next_to_clean.
3347                  */
3348                 smp_mb();
3349                 if (netif_queue_stopped(netdev) &&
3350                     !(test_bit(__IGB_DOWN, &adapter->state))) {
3351                         netif_wake_queue(netdev);
3352                         ++adapter->restart_queue;
3353                 }
3354         }
3355
3356         if (tx_ring->detect_tx_hung) {
3357                 /* Detect a transmit hang in hardware, this serializes the
3358                  * check with the clearing of time_stamp and movement of i */
3359                 tx_ring->detect_tx_hung = false;
3360                 if (tx_ring->buffer_info[i].time_stamp &&
3361                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
3362                                (adapter->tx_timeout_factor * HZ))
3363                     && !(rd32(E1000_STATUS) &
3364                          E1000_STATUS_TXOFF)) {
3365
3366                         tx_desc = E1000_TX_DESC(*tx_ring, i);
3367                         /* detected Tx unit hang */
3368                         dev_err(&adapter->pdev->dev,
3369                                 "Detected Tx Unit Hang\n"
3370                                 "  Tx Queue             <%lu>\n"
3371                                 "  TDH                  <%x>\n"
3372                                 "  TDT                  <%x>\n"
3373                                 "  next_to_use          <%x>\n"
3374                                 "  next_to_clean        <%x>\n"
3375                                 "  head (WB)            <%x>\n"
3376                                 "buffer_info[next_to_clean]\n"
3377                                 "  time_stamp           <%lx>\n"
3378                                 "  jiffies              <%lx>\n"
3379                                 "  desc.status          <%x>\n",
3380                                 (unsigned long)((tx_ring - adapter->tx_ring) /
3381                                         sizeof(struct igb_ring)),
3382                                 readl(adapter->hw.hw_addr + tx_ring->head),
3383                                 readl(adapter->hw.hw_addr + tx_ring->tail),
3384                                 tx_ring->next_to_use,
3385                                 tx_ring->next_to_clean,
3386                                 head,
3387                                 tx_ring->buffer_info[i].time_stamp,
3388                                 jiffies,
3389                                 tx_desc->upper.fields.status);
3390                         netif_stop_queue(netdev);
3391                 }
3392         }
3393         tx_ring->total_bytes += total_bytes;
3394         tx_ring->total_packets += total_packets;
3395         adapter->net_stats.tx_bytes += total_bytes;
3396         adapter->net_stats.tx_packets += total_packets;
3397         return retval;
3398 }
3399
3400
3401 /**
3402  * igb_receive_skb - helper function to handle rx indications
3403  * @adapter: board private structure
3404  * @status: descriptor status field as written by hardware
3405  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3406  * @skb: pointer to sk_buff to be indicated to stack
3407  **/
3408 static void igb_receive_skb(struct igb_adapter *adapter, u8 status, u16 vlan,
3409                             struct sk_buff *skb)
3410 {
3411         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
3412                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3413                                          le16_to_cpu(vlan) &
3414                                          E1000_RXD_SPC_VLAN_MASK);
3415         else
3416                 netif_receive_skb(skb);
3417 }
3418
3419
3420 static inline void igb_rx_checksum_adv(struct igb_adapter *adapter,
3421                                        u32 status_err, struct sk_buff *skb)
3422 {
3423         skb->ip_summed = CHECKSUM_NONE;
3424
3425         /* Ignore Checksum bit is set or checksum is disabled through ethtool */
3426         if ((status_err & E1000_RXD_STAT_IXSM) || !adapter->rx_csum)
3427                 return;
3428         /* TCP/UDP checksum error bit is set */
3429         if (status_err &
3430             (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
3431                 /* let the stack verify checksum errors */
3432                 adapter->hw_csum_err++;
3433                 return;
3434         }
3435         /* It must be a TCP or UDP packet with a valid checksum */
3436         if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
3437                 skb->ip_summed = CHECKSUM_UNNECESSARY;
3438
3439         adapter->hw_csum_good++;
3440 }
3441
3442 static bool igb_clean_rx_irq_adv(struct igb_adapter *adapter,
3443                                       struct igb_ring *rx_ring,
3444                                       int *work_done, int budget)
3445 {
3446         struct net_device *netdev = adapter->netdev;
3447         struct pci_dev *pdev = adapter->pdev;
3448         union e1000_adv_rx_desc *rx_desc , *next_rxd;
3449         struct igb_buffer *buffer_info , *next_buffer;
3450         struct sk_buff *skb;
3451         unsigned int i, j;
3452         u32 length, hlen, staterr;
3453         bool cleaned = false;
3454         int cleaned_count = 0;
3455         unsigned int total_bytes = 0, total_packets = 0;
3456
3457         i = rx_ring->next_to_clean;
3458         rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
3459         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
3460
3461         while (staterr & E1000_RXD_STAT_DD) {
3462                 if (*work_done >= budget)
3463                         break;
3464                 (*work_done)++;
3465                 buffer_info = &rx_ring->buffer_info[i];
3466
3467                 /* HW will not DMA in data larger than the given buffer, even
3468                  * if it parses the (NFS, of course) header to be larger.  In
3469                  * that case, it fills the header buffer and spills the rest
3470                  * into the page.
3471                  */
3472                 hlen = le16_to_cpu((rx_desc->wb.lower.lo_dword.hdr_info &
3473                   E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT);
3474                 if (hlen > adapter->rx_ps_hdr_size)
3475                         hlen = adapter->rx_ps_hdr_size;
3476
3477                 length = le16_to_cpu(rx_desc->wb.upper.length);
3478                 cleaned = true;
3479                 cleaned_count++;
3480
3481                 if (rx_ring->pending_skb != NULL) {
3482                         skb = rx_ring->pending_skb;
3483                         rx_ring->pending_skb = NULL;
3484                         j = rx_ring->pending_skb_page;
3485                 } else {
3486                         skb = buffer_info->skb;
3487                         prefetch(skb->data - NET_IP_ALIGN);
3488                         buffer_info->skb = NULL;
3489                         if (hlen) {
3490                                 pci_unmap_single(pdev, buffer_info->dma,
3491                                                  adapter->rx_ps_hdr_size +
3492                                                    NET_IP_ALIGN,
3493                                                  PCI_DMA_FROMDEVICE);
3494                                 skb_put(skb, hlen);
3495                         } else {
3496                                 pci_unmap_single(pdev, buffer_info->dma,
3497                                                  adapter->rx_buffer_len +
3498                                                    NET_IP_ALIGN,
3499                                                  PCI_DMA_FROMDEVICE);
3500                                 skb_put(skb, length);
3501                                 goto send_up;
3502                         }
3503                         j = 0;
3504                 }
3505
3506                 while (length) {
3507                         pci_unmap_page(pdev, buffer_info->page_dma,
3508                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3509                         buffer_info->page_dma = 0;
3510                         skb_fill_page_desc(skb, j, buffer_info->page,
3511                                                 0, length);
3512                         buffer_info->page = NULL;
3513
3514                         skb->len += length;
3515                         skb->data_len += length;
3516                         skb->truesize += length;
3517                         rx_desc->wb.upper.status_error = 0;
3518                         if (staterr & E1000_RXD_STAT_EOP)
3519                                 break;
3520
3521                         j++;
3522                         cleaned_count++;
3523                         i++;
3524                         if (i == rx_ring->count)
3525                                 i = 0;
3526
3527                         buffer_info = &rx_ring->buffer_info[i];
3528                         rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
3529                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
3530                         length = le16_to_cpu(rx_desc->wb.upper.length);
3531                         if (!(staterr & E1000_RXD_STAT_DD)) {
3532                                 rx_ring->pending_skb = skb;
3533                                 rx_ring->pending_skb_page = j;
3534                                 goto out;
3535                         }
3536                 }
3537 send_up:
3538                 pskb_trim(skb, skb->len - 4);
3539                 i++;
3540                 if (i == rx_ring->count)
3541                         i = 0;
3542                 next_rxd = E1000_RX_DESC_ADV(*rx_ring, i);
3543                 prefetch(next_rxd);
3544                 next_buffer = &rx_ring->buffer_info[i];
3545
3546                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
3547                         dev_kfree_skb_irq(skb);
3548                         goto next_desc;
3549                 }
3550                 rx_ring->no_itr_adjust |= (staterr & E1000_RXD_STAT_DYNINT);
3551
3552                 total_bytes += skb->len;
3553                 total_packets++;
3554
3555                 igb_rx_checksum_adv(adapter, staterr, skb);
3556
3557                 skb->protocol = eth_type_trans(skb, netdev);
3558
3559                 igb_receive_skb(adapter, staterr, rx_desc->wb.upper.vlan, skb);
3560
3561                 netdev->last_rx = jiffies;
3562
3563 next_desc:
3564                 rx_desc->wb.upper.status_error = 0;
3565
3566                 /* return some buffers to hardware, one at a time is too slow */
3567                 if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
3568                         igb_alloc_rx_buffers_adv(adapter, rx_ring,
3569                                                  cleaned_count);
3570                         cleaned_count = 0;
3571                 }
3572
3573                 /* use prefetched values */
3574                 rx_desc = next_rxd;
3575                 buffer_info = next_buffer;
3576
3577                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
3578         }
3579 out:
3580         rx_ring->next_to_clean = i;
3581         cleaned_count = IGB_DESC_UNUSED(rx_ring);
3582
3583         if (cleaned_count)
3584                 igb_alloc_rx_buffers_adv(adapter, rx_ring, cleaned_count);
3585
3586         rx_ring->total_packets += total_packets;
3587         rx_ring->total_bytes += total_bytes;
3588         rx_ring->rx_stats.packets += total_packets;
3589         rx_ring->rx_stats.bytes += total_bytes;
3590         adapter->net_stats.rx_bytes += total_bytes;
3591         adapter->net_stats.rx_packets += total_packets;
3592         return cleaned;
3593 }
3594
3595
3596 /**
3597  * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
3598  * @adapter: address of board private structure
3599  **/
3600 static void igb_alloc_rx_buffers_adv(struct igb_adapter *adapter,
3601                                      struct igb_ring *rx_ring,
3602                                      int cleaned_count)
3603 {
3604         struct net_device *netdev = adapter->netdev;
3605         struct pci_dev *pdev = adapter->pdev;
3606         union e1000_adv_rx_desc *rx_desc;
3607         struct igb_buffer *buffer_info;
3608         struct sk_buff *skb;
3609         unsigned int i;
3610
3611         i = rx_ring->next_to_use;
3612         buffer_info = &rx_ring->buffer_info[i];
3613
3614         while (cleaned_count--) {
3615                 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
3616
3617                 if (adapter->rx_ps_hdr_size && !buffer_info->page) {
3618                         buffer_info->page = alloc_page(GFP_ATOMIC);
3619                         if (!buffer_info->page) {
3620                                 adapter->alloc_rx_buff_failed++;
3621                                 goto no_buffers;
3622                         }
3623                         buffer_info->page_dma =
3624                                 pci_map_page(pdev,
3625                                              buffer_info->page,
3626                                              0, PAGE_SIZE,
3627                                              PCI_DMA_FROMDEVICE);
3628                 }
3629
3630                 if (!buffer_info->skb) {
3631                         int bufsz;
3632
3633                         if (adapter->rx_ps_hdr_size)
3634                                 bufsz = adapter->rx_ps_hdr_size;
3635                         else
3636                                 bufsz = adapter->rx_buffer_len;
3637                         bufsz += NET_IP_ALIGN;
3638                         skb = netdev_alloc_skb(netdev, bufsz);
3639
3640                         if (!skb) {
3641                                 adapter->alloc_rx_buff_failed++;
3642                                 goto no_buffers;
3643                         }
3644
3645                         /* Make buffer alignment 2 beyond a 16 byte boundary
3646                          * this will result in a 16 byte aligned IP header after
3647                          * the 14 byte MAC header is removed
3648                          */
3649                         skb_reserve(skb, NET_IP_ALIGN);
3650
3651                         buffer_info->skb = skb;
3652                         buffer_info->dma = pci_map_single(pdev, skb->data,
3653                                                           bufsz,
3654                                                           PCI_DMA_FROMDEVICE);
3655
3656                 }
3657                 /* Refresh the desc even if buffer_addrs didn't change because
3658                  * each write-back erases this info. */
3659                 if (adapter->rx_ps_hdr_size) {
3660                         rx_desc->read.pkt_addr =
3661                              cpu_to_le64(buffer_info->page_dma);
3662                         rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
3663                 } else {
3664                         rx_desc->read.pkt_addr =
3665                              cpu_to_le64(buffer_info->dma);
3666                         rx_desc->read.hdr_addr = 0;
3667                 }
3668
3669                 i++;
3670                 if (i == rx_ring->count)
3671                         i = 0;
3672                 buffer_info = &rx_ring->buffer_info[i];
3673         }
3674
3675 no_buffers:
3676         if (rx_ring->next_to_use != i) {
3677                 rx_ring->next_to_use = i;
3678                 if (i == 0)
3679                         i = (rx_ring->count - 1);
3680                 else
3681                         i--;
3682
3683                 /* Force memory writes to complete before letting h/w
3684                  * know there are new descriptors to fetch.  (Only
3685                  * applicable for weak-ordered memory model archs,
3686                  * such as IA-64). */
3687                 wmb();
3688                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
3689         }
3690 }
3691
3692 /**
3693  * igb_mii_ioctl -
3694  * @netdev:
3695  * @ifreq:
3696  * @cmd:
3697  **/
3698 static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3699 {
3700         struct igb_adapter *adapter = netdev_priv(netdev);
3701         struct mii_ioctl_data *data = if_mii(ifr);
3702
3703         if (adapter->hw.phy.media_type != e1000_media_type_copper)
3704                 return -EOPNOTSUPP;
3705
3706         switch (cmd) {
3707         case SIOCGMIIPHY:
3708                 data->phy_id = adapter->hw.phy.addr;
3709                 break;
3710         case SIOCGMIIREG:
3711                 if (!capable(CAP_NET_ADMIN))
3712                         return -EPERM;
3713                 if (adapter->hw.phy.ops.read_phy_reg(&adapter->hw,
3714                                                      data->reg_num
3715                                                      & 0x1F, &data->val_out))
3716                         return -EIO;
3717                 break;
3718         case SIOCSMIIREG:
3719         default:
3720                 return -EOPNOTSUPP;
3721         }
3722         return 0;
3723 }
3724
3725 /**
3726  * igb_ioctl -
3727  * @netdev:
3728  * @ifreq:
3729  * @cmd:
3730  **/
3731 static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3732 {
3733         switch (cmd) {
3734         case SIOCGMIIPHY:
3735         case SIOCGMIIREG:
3736         case SIOCSMIIREG:
3737                 return igb_mii_ioctl(netdev, ifr, cmd);
3738         default:
3739                 return -EOPNOTSUPP;
3740         }
3741 }
3742
3743 static void igb_vlan_rx_register(struct net_device *netdev,
3744                                  struct vlan_group *grp)
3745 {
3746         struct igb_adapter *adapter = netdev_priv(netdev);
3747         struct e1000_hw *hw = &adapter->hw;
3748         u32 ctrl, rctl;
3749
3750         igb_irq_disable(adapter);
3751         adapter->vlgrp = grp;
3752
3753         if (grp) {
3754                 /* enable VLAN tag insert/strip */
3755                 ctrl = rd32(E1000_CTRL);
3756                 ctrl |= E1000_CTRL_VME;
3757                 wr32(E1000_CTRL, ctrl);
3758
3759                 /* enable VLAN receive filtering */
3760                 rctl = rd32(E1000_RCTL);
3761                 rctl |= E1000_RCTL_VFE;
3762                 rctl &= ~E1000_RCTL_CFIEN;
3763                 wr32(E1000_RCTL, rctl);
3764                 igb_update_mng_vlan(adapter);
3765                 wr32(E1000_RLPML,
3766                                 adapter->max_frame_size + VLAN_TAG_SIZE);
3767         } else {
3768                 /* disable VLAN tag insert/strip */
3769                 ctrl = rd32(E1000_CTRL);
3770                 ctrl &= ~E1000_CTRL_VME;
3771                 wr32(E1000_CTRL, ctrl);
3772
3773                 /* disable VLAN filtering */
3774                 rctl = rd32(E1000_RCTL);
3775                 rctl &= ~E1000_RCTL_VFE;
3776                 wr32(E1000_RCTL, rctl);
3777                 if (adapter->mng_vlan_id != (u16)IGB_MNG_VLAN_NONE) {
3778                         igb_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3779                         adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
3780                 }
3781                 wr32(E1000_RLPML,
3782                                 adapter->max_frame_size);
3783         }
3784
3785         if (!test_bit(__IGB_DOWN, &adapter->state))
3786                 igb_irq_enable(adapter);
3787 }
3788
3789 static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3790 {
3791         struct igb_adapter *adapter = netdev_priv(netdev);
3792         struct e1000_hw *hw = &adapter->hw;
3793         u32 vfta, index;
3794
3795         if ((adapter->hw.mng_cookie.status &
3796              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3797             (vid == adapter->mng_vlan_id))
3798                 return;
3799         /* add VID to filter table */
3800         index = (vid >> 5) & 0x7F;
3801         vfta = array_rd32(E1000_VFTA, index);
3802         vfta |= (1 << (vid & 0x1F));
3803         igb_write_vfta(&adapter->hw, index, vfta);
3804 }
3805
3806 static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3807 {
3808         struct igb_adapter *adapter = netdev_priv(netdev);
3809         struct e1000_hw *hw = &adapter->hw;
3810         u32 vfta, index;
3811
3812         igb_irq_disable(adapter);
3813         vlan_group_set_device(adapter->vlgrp, vid, NULL);
3814
3815         if (!test_bit(__IGB_DOWN, &adapter->state))
3816                 igb_irq_enable(adapter);
3817
3818         if ((adapter->hw.mng_cookie.status &
3819              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3820             (vid == adapter->mng_vlan_id)) {
3821                 /* release control to f/w */
3822                 igb_release_hw_control(adapter);
3823                 return;
3824         }
3825
3826         /* remove VID from filter table */
3827         index = (vid >> 5) & 0x7F;
3828         vfta = array_rd32(E1000_VFTA, index);
3829         vfta &= ~(1 << (vid & 0x1F));
3830         igb_write_vfta(&adapter->hw, index, vfta);
3831 }
3832
3833 static void igb_restore_vlan(struct igb_adapter *adapter)
3834 {
3835         igb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
3836
3837         if (adapter->vlgrp) {
3838                 u16 vid;
3839                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
3840                         if (!vlan_group_get_device(adapter->vlgrp, vid))
3841                                 continue;
3842                         igb_vlan_rx_add_vid(adapter->netdev, vid);
3843                 }
3844         }
3845 }
3846
3847 int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx)
3848 {
3849         struct e1000_mac_info *mac = &adapter->hw.mac;
3850
3851         mac->autoneg = 0;
3852
3853         /* Fiber NICs only allow 1000 gbps Full duplex */
3854         if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&
3855                 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
3856                 dev_err(&adapter->pdev->dev,
3857                         "Unsupported Speed/Duplex configuration\n");
3858                 return -EINVAL;
3859         }
3860
3861         switch (spddplx) {
3862         case SPEED_10 + DUPLEX_HALF:
3863                 mac->forced_speed_duplex = ADVERTISE_10_HALF;
3864                 break;
3865         case SPEED_10 + DUPLEX_FULL:
3866                 mac->forced_speed_duplex = ADVERTISE_10_FULL;
3867                 break;
3868         case SPEED_100 + DUPLEX_HALF:
3869                 mac->forced_speed_duplex = ADVERTISE_100_HALF;
3870                 break;
3871         case SPEED_100 + DUPLEX_FULL:
3872                 mac->forced_speed_duplex = ADVERTISE_100_FULL;
3873                 break;
3874         case SPEED_1000 + DUPLEX_FULL:
3875                 mac->autoneg = 1;
3876                 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
3877                 break;
3878         case SPEED_1000 + DUPLEX_HALF: /* not supported */
3879         default:
3880                 dev_err(&adapter->pdev->dev,
3881                         "Unsupported Speed/Duplex configuration\n");
3882                 return -EINVAL;
3883         }
3884         return 0;
3885 }
3886
3887
3888 static int igb_suspend(struct pci_dev *pdev, pm_message_t state)
3889 {
3890         struct net_device *netdev = pci_get_drvdata(pdev);
3891         struct igb_adapter *adapter = netdev_priv(netdev);
3892         struct e1000_hw *hw = &adapter->hw;
3893         u32 ctrl, ctrl_ext, rctl, status;
3894         u32 wufc = adapter->wol;
3895 #ifdef CONFIG_PM
3896         int retval = 0;
3897 #endif
3898
3899         netif_device_detach(netdev);
3900
3901         if (netif_running(netdev)) {
3902                 WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
3903                 igb_down(adapter);
3904                 igb_free_irq(adapter);
3905         }
3906
3907 #ifdef CONFIG_PM
3908         retval = pci_save_state(pdev);
3909         if (retval)
3910                 return retval;
3911 #endif
3912
3913         status = rd32(E1000_STATUS);
3914         if (status & E1000_STATUS_LU)
3915                 wufc &= ~E1000_WUFC_LNKC;
3916
3917         if (wufc) {
3918                 igb_setup_rctl(adapter);
3919                 igb_set_multi(netdev);
3920
3921                 /* turn on all-multi mode if wake on multicast is enabled */
3922                 if (wufc & E1000_WUFC_MC) {
3923                         rctl = rd32(E1000_RCTL);
3924                         rctl |= E1000_RCTL_MPE;
3925                         wr32(E1000_RCTL, rctl);
3926                 }
3927
3928                 ctrl = rd32(E1000_CTRL);
3929                 /* advertise wake from D3Cold */
3930                 #define E1000_CTRL_ADVD3WUC 0x00100000
3931                 /* phy power management enable */
3932                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
3933                 ctrl |= E1000_CTRL_ADVD3WUC;
3934                 wr32(E1000_CTRL, ctrl);
3935
3936                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
3937                    adapter->hw.phy.media_type ==
3938                                         e1000_media_type_internal_serdes) {
3939                         /* keep the laser running in D3 */
3940                         ctrl_ext = rd32(E1000_CTRL_EXT);
3941                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
3942                         wr32(E1000_CTRL_EXT, ctrl_ext);
3943                 }
3944
3945                 /* Allow time for pending master requests to run */
3946                 igb_disable_pcie_master(&adapter->hw);
3947
3948                 wr32(E1000_WUC, E1000_WUC_PME_EN);
3949                 wr32(E1000_WUFC, wufc);
3950                 pci_enable_wake(pdev, PCI_D3hot, 1);
3951                 pci_enable_wake(pdev, PCI_D3cold, 1);
3952         } else {
3953                 wr32(E1000_WUC, 0);
3954                 wr32(E1000_WUFC, 0);
3955                 pci_enable_wake(pdev, PCI_D3hot, 0);
3956                 pci_enable_wake(pdev, PCI_D3cold, 0);
3957         }
3958
3959         igb_release_manageability(adapter);
3960
3961         /* make sure adapter isn't asleep if manageability is enabled */
3962         if (adapter->en_mng_pt) {
3963                 pci_enable_wake(pdev, PCI_D3hot, 1);
3964                 pci_enable_wake(pdev, PCI_D3cold, 1);
3965         }
3966
3967         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
3968          * would have already happened in close and is redundant. */
3969         igb_release_hw_control(adapter);
3970
3971         pci_disable_device(pdev);
3972
3973         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3974
3975         return 0;
3976 }
3977
3978 #ifdef CONFIG_PM
3979 static int igb_resume(struct pci_dev *pdev)
3980 {
3981         struct net_device *netdev = pci_get_drvdata(pdev);
3982         struct igb_adapter *adapter = netdev_priv(netdev);
3983         struct e1000_hw *hw = &adapter->hw;
3984         u32 err;
3985
3986         pci_set_power_state(pdev, PCI_D0);
3987         pci_restore_state(pdev);
3988         err = pci_enable_device(pdev);
3989         if (err) {
3990                 dev_err(&pdev->dev,
3991                         "igb: Cannot enable PCI device from suspend\n");
3992                 return err;
3993         }
3994         pci_set_master(pdev);
3995
3996         pci_enable_wake(pdev, PCI_D3hot, 0);
3997         pci_enable_wake(pdev, PCI_D3cold, 0);
3998
3999         if (netif_running(netdev)) {
4000                 err = igb_request_irq(adapter);
4001                 if (err)
4002                         return err;
4003         }
4004
4005         /* e1000_power_up_phy(adapter); */
4006
4007         igb_reset(adapter);
4008         wr32(E1000_WUS, ~0);
4009
4010         igb_init_manageability(adapter);
4011
4012         if (netif_running(netdev))
4013                 igb_up(adapter);
4014
4015         netif_device_attach(netdev);
4016
4017         /* let the f/w know that the h/w is now under the control of the
4018          * driver. */
4019         igb_get_hw_control(adapter);
4020
4021         return 0;
4022 }
4023 #endif
4024
4025 static void igb_shutdown(struct pci_dev *pdev)
4026 {
4027         igb_suspend(pdev, PMSG_SUSPEND);
4028 }
4029
4030 #ifdef CONFIG_NET_POLL_CONTROLLER
4031 /*
4032  * Polling 'interrupt' - used by things like netconsole to send skbs
4033  * without having to re-enable interrupts. It's not called while
4034  * the interrupt routine is executing.
4035  */
4036 static void igb_netpoll(struct net_device *netdev)
4037 {
4038         struct igb_adapter *adapter = netdev_priv(netdev);
4039         int i;
4040         int work_done = 0;
4041
4042         igb_irq_disable(adapter);
4043         for (i = 0; i < adapter->num_tx_queues; i++)
4044                 igb_clean_tx_irq(adapter, &adapter->tx_ring[i]);
4045
4046         for (i = 0; i < adapter->num_rx_queues; i++)
4047                 igb_clean_rx_irq_adv(adapter, &adapter->rx_ring[i],
4048                                      &work_done,
4049                                      adapter->rx_ring[i].napi.weight);
4050
4051         igb_irq_enable(adapter);
4052 }
4053 #endif /* CONFIG_NET_POLL_CONTROLLER */
4054
4055 /**
4056  * igb_io_error_detected - called when PCI error is detected
4057  * @pdev: Pointer to PCI device
4058  * @state: The current pci connection state
4059  *
4060  * This function is called after a PCI bus error affecting
4061  * this device has been detected.
4062  */
4063 static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
4064                                               pci_channel_state_t state)
4065 {
4066         struct net_device *netdev = pci_get_drvdata(pdev);
4067         struct igb_adapter *adapter = netdev_priv(netdev);
4068
4069         netif_device_detach(netdev);
4070
4071         if (netif_running(netdev))
4072                 igb_down(adapter);
4073         pci_disable_device(pdev);
4074
4075         /* Request a slot slot reset. */
4076         return PCI_ERS_RESULT_NEED_RESET;
4077 }
4078
4079 /**
4080  * igb_io_slot_reset - called after the pci bus has been reset.
4081  * @pdev: Pointer to PCI device
4082  *
4083  * Restart the card from scratch, as if from a cold-boot. Implementation
4084  * resembles the first-half of the igb_resume routine.
4085  */
4086 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
4087 {
4088         struct net_device *netdev = pci_get_drvdata(pdev);
4089         struct igb_adapter *adapter = netdev_priv(netdev);
4090         struct e1000_hw *hw = &adapter->hw;
4091
4092         if (pci_enable_device(pdev)) {
4093                 dev_err(&pdev->dev,
4094                         "Cannot re-enable PCI device after reset.\n");
4095                 return PCI_ERS_RESULT_DISCONNECT;
4096         }
4097         pci_set_master(pdev);
4098
4099         pci_enable_wake(pdev, PCI_D3hot, 0);
4100         pci_enable_wake(pdev, PCI_D3cold, 0);
4101
4102         igb_reset(adapter);
4103         wr32(E1000_WUS, ~0);
4104
4105         return PCI_ERS_RESULT_RECOVERED;
4106 }
4107
4108 /**
4109  * igb_io_resume - called when traffic can start flowing again.
4110  * @pdev: Pointer to PCI device
4111  *
4112  * This callback is called when the error recovery driver tells us that
4113  * its OK to resume normal operation. Implementation resembles the
4114  * second-half of the igb_resume routine.
4115  */
4116 static void igb_io_resume(struct pci_dev *pdev)
4117 {
4118         struct net_device *netdev = pci_get_drvdata(pdev);
4119         struct igb_adapter *adapter = netdev_priv(netdev);
4120
4121         igb_init_manageability(adapter);
4122
4123         if (netif_running(netdev)) {
4124                 if (igb_up(adapter)) {
4125                         dev_err(&pdev->dev, "igb_up failed after reset\n");
4126                         return;
4127                 }
4128         }
4129
4130         netif_device_attach(netdev);
4131
4132         /* let the f/w know that the h/w is now under the control of the
4133          * driver. */
4134         igb_get_hw_control(adapter);
4135
4136 }
4137
4138 /* igb_main.c */