drivers/net/igb/igb_main.c

   1 /*******************************************************************************
   2
   3   Intel(R) Gigabit Ethernet Linux driver
   4   Copyright(c) 2007-2009 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/ipv6.h>
  35 #include <net/checksum.h>
  36 #include <net/ip6_checksum.h>
  37 #include <linux/net_tstamp.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/pci-aspm.h>
  43 #include <linux/delay.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/if_ether.h>
  46 #include <linux/aer.h>
  47 #ifdef CONFIG_IGB_DCA
  48 #include <linux/dca.h>
  49 #endif
  50 #include "igb.h"
  51
  52 #define DRV_VERSION "2.1.0-k2"
  53 char igb_driver_name[] = "igb";
  54 char igb_driver_version[] = DRV_VERSION;
  55 static const char igb_driver_string[] =
  56                                 "Intel(R) Gigabit Ethernet Network Driver";
  57 static const char igb_copyright[] = "Copyright (c) 2007-2009 Intel Corporation.";
  58
  59 static const struct e1000_info *igb_info_tbl[] = {
  60         [board_82575] = &e1000_82575_info,
  61 };
  62
  63 static DEFINE_PCI_DEVICE_TABLE(igb_pci_tbl) = {
  64         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 },
  65         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 },
  66         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SERDES), board_82575 },
  67         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SGMII), board_82575 },
  68         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER_DUAL), board_82575 },
  69         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576), board_82575 },
  70         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS), board_82575 },
  71         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS_SERDES), board_82575 },
  72         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER), board_82575 },
  73         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES), board_82575 },
  74         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES_QUAD), board_82575 },
  75         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER_ET2), board_82575 },
  76         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER), board_82575 },
  77         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 },
  78         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 },
  79         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 },
  80         /* required last entry */
  81         {0, }
  82 };
  83
  84 MODULE_DEVICE_TABLE(pci, igb_pci_tbl);
  85
  86 void igb_reset(struct igb_adapter *);
  87 static int igb_setup_all_tx_resources(struct igb_adapter *);
  88 static int igb_setup_all_rx_resources(struct igb_adapter *);
  89 static void igb_free_all_tx_resources(struct igb_adapter *);
  90 static void igb_free_all_rx_resources(struct igb_adapter *);
  91 static void igb_setup_mrqc(struct igb_adapter *);
  92 void igb_update_stats(struct igb_adapter *);
  93 static int igb_probe(struct pci_dev *, const struct pci_device_id *);
  94 static void __devexit igb_remove(struct pci_dev *pdev);
  95 static int igb_sw_init(struct igb_adapter *);
  96 static int igb_open(struct net_device *);
  97 static int igb_close(struct net_device *);
  98 static void igb_configure_tx(struct igb_adapter *);
  99 static void igb_configure_rx(struct igb_adapter *);
 100 static void igb_clean_all_tx_rings(struct igb_adapter *);
 101 static void igb_clean_all_rx_rings(struct igb_adapter *);
 102 static void igb_clean_tx_ring(struct igb_ring *);
 103 static void igb_clean_rx_ring(struct igb_ring *);
 104 static void igb_set_rx_mode(struct net_device *);
 105 static void igb_update_phy_info(unsigned long);
 106 static void igb_watchdog(unsigned long);
 107 static void igb_watchdog_task(struct work_struct *);
 108 static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *);
 109 static struct net_device_stats *igb_get_stats(struct net_device *);
 110 static int igb_change_mtu(struct net_device *, int);
 111 static int igb_set_mac(struct net_device *, void *);
 112 static void igb_set_uta(struct igb_adapter *adapter);
 113 static irqreturn_t igb_intr(int irq, void *);
 114 static irqreturn_t igb_intr_msi(int irq, void *);
 115 static irqreturn_t igb_msix_other(int irq, void *);
 116 static irqreturn_t igb_msix_ring(int irq, void *);
 117 #ifdef CONFIG_IGB_DCA
 118 static void igb_update_dca(struct igb_q_vector *);
 119 static void igb_setup_dca(struct igb_adapter *);
 120 #endif /* CONFIG_IGB_DCA */
 121 static bool igb_clean_tx_irq(struct igb_q_vector *);
 122 static int igb_poll(struct napi_struct *, int);
 123 static bool igb_clean_rx_irq_adv(struct igb_q_vector *, int *, int);
 124 static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
 125 static void igb_tx_timeout(struct net_device *);
 126 static void igb_reset_task(struct work_struct *);
 127 static void igb_vlan_rx_register(struct net_device *, struct vlan_group *);
 128 static void igb_vlan_rx_add_vid(struct net_device *, u16);
 129 static void igb_vlan_rx_kill_vid(struct net_device *, u16);
 130 static void igb_restore_vlan(struct igb_adapter *);
 131 static void igb_rar_set_qsel(struct igb_adapter *, u8 *, u32 , u8);
 132 static void igb_ping_all_vfs(struct igb_adapter *);
 133 static void igb_msg_task(struct igb_adapter *);
 134 static void igb_vmm_control(struct igb_adapter *);
 135 static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *);
 136 static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
 137 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac);
 138 static int igb_ndo_set_vf_vlan(struct net_device *netdev,
 139                                int vf, u16 vlan, u8 qos);
 140 static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
 141 static int igb_ndo_get_vf_config(struct net_device *netdev, int vf,
 142                                  struct ifla_vf_info *ivi);
 143
 144 #ifdef CONFIG_PM
 145 static int igb_suspend(struct pci_dev *, pm_message_t);
 146 static int igb_resume(struct pci_dev *);
 147 #endif
 148 static void igb_shutdown(struct pci_dev *);
 149 #ifdef CONFIG_IGB_DCA
 150 static int igb_notify_dca(struct notifier_block *, unsigned long, void *);
 151 static struct notifier_block dca_notifier = {
 152         .notifier_call  = igb_notify_dca,
 153         .next           = NULL,
 154         .priority       = 0
 155 };
 156 #endif
 157 #ifdef CONFIG_NET_POLL_CONTROLLER
 158 /* for netdump / net console */
 159 static void igb_netpoll(struct net_device *);
 160 #endif
 161 #ifdef CONFIG_PCI_IOV
 162 static unsigned int max_vfs = 0;
 163 module_param(max_vfs, uint, 0);
 164 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
 165                  "per physical function");
 166 #endif /* CONFIG_PCI_IOV */
 167
 168 static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
 169                      pci_channel_state_t);
 170 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
 171 static void igb_io_resume(struct pci_dev *);
 172
 173 static struct pci_error_handlers igb_err_handler = {
 174         .error_detected = igb_io_error_detected,
 175         .slot_reset = igb_io_slot_reset,
 176         .resume = igb_io_resume,
 177 };
 178
 179
 180 static struct pci_driver igb_driver = {
 181         .name     = igb_driver_name,
 182         .id_table = igb_pci_tbl,
 183         .probe    = igb_probe,
 184         .remove   = __devexit_p(igb_remove),
 185 #ifdef CONFIG_PM
 186         /* Power Managment Hooks */
 187         .suspend  = igb_suspend,
 188         .resume   = igb_resume,
 189 #endif
 190         .shutdown = igb_shutdown,
 191         .err_handler = &igb_err_handler
 192 };
 193
 194 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
 195 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
 196 MODULE_LICENSE("GPL");
 197 MODULE_VERSION(DRV_VERSION);
 198
 199 /**
 200  * igb_read_clock - read raw cycle counter (to be used by time counter)
 201  */
 202 static cycle_t igb_read_clock(const struct cyclecounter *tc)
 203 {
 204         struct igb_adapter *adapter =
 205                 container_of(tc, struct igb_adapter, cycles);
 206         struct e1000_hw *hw = &adapter->hw;
 207         u64 stamp = 0;
 208         int shift = 0;
 209
 210         /*
 211          * The timestamp latches on lowest register read. For the 82580
 212          * the lowest register is SYSTIMR instead of SYSTIML.  However we never
 213          * adjusted TIMINCA so SYSTIMR will just read as all 0s so ignore it.
 214          */
 215         if (hw->mac.type == e1000_82580) {
 216                 stamp = rd32(E1000_SYSTIMR) >> 8;
 217                 shift = IGB_82580_TSYNC_SHIFT;
 218         }
 219
 220         stamp |= (u64)rd32(E1000_SYSTIML) << shift;
 221         stamp |= (u64)rd32(E1000_SYSTIMH) << (shift + 32);
 222         return stamp;
 223 }
 224
 225 #ifdef DEBUG
 226 /**
 227  * igb_get_hw_dev_name - return device name string
 228  * used by hardware layer to print debugging information
 229  **/
 230 char *igb_get_hw_dev_name(struct e1000_hw *hw)
 231 {
 232         struct igb_adapter *adapter = hw->back;
 233         return adapter->netdev->name;
 234 }
 235
 236 /**
 237  * igb_get_time_str - format current NIC and system time as string
 238  */
 239 static char *igb_get_time_str(struct igb_adapter *adapter,
 240                               char buffer[160])
 241 {
 242         cycle_t hw = adapter->cycles.read(&adapter->cycles);
 243         struct timespec nic = ns_to_timespec(timecounter_read(&adapter->clock));
 244         struct timespec sys;
 245         struct timespec delta;
 246         getnstimeofday(&sys);
 247
 248         delta = timespec_sub(nic, sys);
 249
 250         sprintf(buffer,
 251                 "HW %llu, NIC %ld.%09lus, SYS %ld.%09lus, NIC-SYS %lds + %09luns",
 252                 hw,
 253                 (long)nic.tv_sec, nic.tv_nsec,
 254                 (long)sys.tv_sec, sys.tv_nsec,
 255                 (long)delta.tv_sec, delta.tv_nsec);
 256
 257         return buffer;
 258 }
 259 #endif
 260
 261 /**
 262  * igb_init_module - Driver Registration Routine
 263  *
 264  * igb_init_module is the first routine called when the driver is
 265  * loaded. All it does is register with the PCI subsystem.
 266  **/
 267 static int __init igb_init_module(void)
 268 {
 269         int ret;
 270         printk(KERN_INFO "%s - version %s\n",
 271                igb_driver_string, igb_driver_version);
 272
 273         printk(KERN_INFO "%s\n", igb_copyright);
 274
 275 #ifdef CONFIG_IGB_DCA
 276         dca_register_notify(&dca_notifier);
 277 #endif
 278         ret = pci_register_driver(&igb_driver);
 279         return ret;
 280 }
 281
 282 module_init(igb_init_module);
 283
 284 /**
 285  * igb_exit_module - Driver Exit Cleanup Routine
 286  *
 287  * igb_exit_module is called just before the driver is removed
 288  * from memory.
 289  **/
 290 static void __exit igb_exit_module(void)
 291 {
 292 #ifdef CONFIG_IGB_DCA
 293         dca_unregister_notify(&dca_notifier);
 294 #endif
 295         pci_unregister_driver(&igb_driver);
 296 }
 297
 298 module_exit(igb_exit_module);
 299
 300 #define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1))
 301 /**
 302  * igb_cache_ring_register - Descriptor ring to register mapping
 303  * @adapter: board private structure to initialize
 304  *
 305  * Once we know the feature-set enabled for the device, we'll cache
 306  * the register offset the descriptor ring is assigned to.
 307  **/
 308 static void igb_cache_ring_register(struct igb_adapter *adapter)
 309 {
 310         int i = 0, j = 0;
 311         u32 rbase_offset = adapter->vfs_allocated_count;
 312
 313         switch (adapter->hw.mac.type) {
 314         case e1000_82576:
 315                 /* The queues are allocated for virtualization such that VF 0
 316                  * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc.
 317                  * In order to avoid collision we start at the first free queue
 318                  * and continue consuming queues in the same sequence
 319                  */
 320                 if (adapter->vfs_allocated_count) {
 321                         for (; i < adapter->rss_queues; i++)
 322                                 adapter->rx_ring[i]->reg_idx = rbase_offset +
 323                                                                Q_IDX_82576(i);
 324                         for (; j < adapter->rss_queues; j++)
 325                                 adapter->tx_ring[j]->reg_idx = rbase_offset +
 326                                                                Q_IDX_82576(j);
 327                 }
 328         case e1000_82575:
 329         case e1000_82580:
 330         default:
 331                 for (; i < adapter->num_rx_queues; i++)
 332                         adapter->rx_ring[i]->reg_idx = rbase_offset + i;
 333                 for (; j < adapter->num_tx_queues; j++)
 334                         adapter->tx_ring[j]->reg_idx = rbase_offset + j;
 335                 break;
 336         }
 337 }
 338
 339 static void igb_free_queues(struct igb_adapter *adapter)
 340 {
 341         int i;
 342
 343         for (i = 0; i < adapter->num_tx_queues; i++) {
 344                 kfree(adapter->tx_ring[i]);
 345                 adapter->tx_ring[i] = NULL;
 346         }
 347         for (i = 0; i < adapter->num_rx_queues; i++) {
 348                 kfree(adapter->rx_ring[i]);
 349                 adapter->rx_ring[i] = NULL;
 350         }
 351         adapter->num_rx_queues = 0;
 352         adapter->num_tx_queues = 0;
 353 }
 354
 355 /**
 356  * igb_alloc_queues - Allocate memory for all rings
 357  * @adapter: board private structure to initialize
 358  *
 359  * We allocate one ring per queue at run-time since we don't know the
 360  * number of queues at compile-time.
 361  **/
 362 static int igb_alloc_queues(struct igb_adapter *adapter)
 363 {
 364         struct igb_ring *ring;
 365         int i;
 366
 367         for (i = 0; i < adapter->num_tx_queues; i++) {
 368                 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL);
 369                 if (!ring)
 370                         goto err;
 371                 ring->count = adapter->tx_ring_count;
 372                 ring->queue_index = i;
 373                 ring->pdev = adapter->pdev;
 374                 ring->netdev = adapter->netdev;
 375                 /* For 82575, context index must be unique per ring. */
 376                 if (adapter->hw.mac.type == e1000_82575)
 377                         ring->flags = IGB_RING_FLAG_TX_CTX_IDX;
 378                 adapter->tx_ring[i] = ring;
 379         }
 380
 381         for (i = 0; i < adapter->num_rx_queues; i++) {
 382                 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL);
 383                 if (!ring)
 384                         goto err;
 385                 ring->count = adapter->rx_ring_count;
 386                 ring->queue_index = i;
 387                 ring->pdev = adapter->pdev;
 388                 ring->netdev = adapter->netdev;
 389                 ring->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
 390                 ring->flags = IGB_RING_FLAG_RX_CSUM; /* enable rx checksum */
 391                 /* set flag indicating ring supports SCTP checksum offload */
 392                 if (adapter->hw.mac.type >= e1000_82576)
 393                         ring->flags |= IGB_RING_FLAG_RX_SCTP_CSUM;
 394                 adapter->rx_ring[i] = ring;
 395         }
 396
 397         igb_cache_ring_register(adapter);
 398
 399         return 0;
 400
 401 err:
 402         igb_free_queues(adapter);
 403
 404         return -ENOMEM;
 405 }
 406
 407 #define IGB_N0_QUEUE -1
 408 static void igb_assign_vector(struct igb_q_vector *q_vector, int msix_vector)
 409 {
 410         u32 msixbm = 0;
 411         struct igb_adapter *adapter = q_vector->adapter;
 412         struct e1000_hw *hw = &adapter->hw;
 413         u32 ivar, index;
 414         int rx_queue = IGB_N0_QUEUE;
 415         int tx_queue = IGB_N0_QUEUE;
 416
 417         if (q_vector->rx_ring)
 418                 rx_queue = q_vector->rx_ring->reg_idx;
 419         if (q_vector->tx_ring)
 420                 tx_queue = q_vector->tx_ring->reg_idx;
 421
 422         switch (hw->mac.type) {
 423         case e1000_82575:
 424                 /* The 82575 assigns vectors using a bitmask, which matches the
 425                    bitmask for the EICR/EIMS/EIMC registers.  To assign one
 426                    or more queues to a vector, we write the appropriate bits
 427                    into the MSIXBM register for that vector. */
 428                 if (rx_queue > IGB_N0_QUEUE)
 429                         msixbm = E1000_EICR_RX_QUEUE0 << rx_queue;
 430                 if (tx_queue > IGB_N0_QUEUE)
 431                         msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue;
 432                 if (!adapter->msix_entries && msix_vector == 0)
 433                         msixbm |= E1000_EIMS_OTHER;
 434                 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm);
 435                 q_vector->eims_value = msixbm;
 436                 break;
 437         case e1000_82576:
 438                 /* 82576 uses a table-based method for assigning vectors.
 439                    Each queue has a single entry in the table to which we write
 440                    a vector number along with a "valid" bit.  Sadly, the layout
 441                    of the table is somewhat counterintuitive. */
 442                 if (rx_queue > IGB_N0_QUEUE) {
 443                         index = (rx_queue & 0x7);
 444                         ivar = array_rd32(E1000_IVAR0, index);
 445                         if (rx_queue < 8) {
 446                                 /* vector goes into low byte of register */
 447                                 ivar = ivar & 0xFFFFFF00;
 448                                 ivar |= msix_vector | E1000_IVAR_VALID;
 449                         } else {
 450                                 /* vector goes into third byte of register */
 451                                 ivar = ivar & 0xFF00FFFF;
 452                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
 453                         }
 454                         array_wr32(E1000_IVAR0, index, ivar);
 455                 }
 456                 if (tx_queue > IGB_N0_QUEUE) {
 457                         index = (tx_queue & 0x7);
 458                         ivar = array_rd32(E1000_IVAR0, index);
 459                         if (tx_queue < 8) {
 460                                 /* vector goes into second byte of register */
 461                                 ivar = ivar & 0xFFFF00FF;
 462                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
 463                         } else {
 464                                 /* vector goes into high byte of register */
 465                                 ivar = ivar & 0x00FFFFFF;
 466                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
 467                         }
 468                         array_wr32(E1000_IVAR0, index, ivar);
 469                 }
 470                 q_vector->eims_value = 1 << msix_vector;
 471                 break;
 472         case e1000_82580:
 473                 /* 82580 uses the same table-based approach as 82576 but has fewer
 474                    entries as a result we carry over for queues greater than 4. */
 475                 if (rx_queue > IGB_N0_QUEUE) {
 476                         index = (rx_queue >> 1);
 477                         ivar = array_rd32(E1000_IVAR0, index);
 478                         if (rx_queue & 0x1) {
 479                                 /* vector goes into third byte of register */
 480                                 ivar = ivar & 0xFF00FFFF;
 481                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
 482                         } else {
 483                                 /* vector goes into low byte of register */
 484                                 ivar = ivar & 0xFFFFFF00;
 485                                 ivar |= msix_vector | E1000_IVAR_VALID;
 486                         }
 487                         array_wr32(E1000_IVAR0, index, ivar);
 488                 }
 489                 if (tx_queue > IGB_N0_QUEUE) {
 490                         index = (tx_queue >> 1);
 491                         ivar = array_rd32(E1000_IVAR0, index);
 492                         if (tx_queue & 0x1) {
 493                                 /* vector goes into high byte of register */
 494                                 ivar = ivar & 0x00FFFFFF;
 495                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
 496                         } else {
 497                                 /* vector goes into second byte of register */
 498                                 ivar = ivar & 0xFFFF00FF;
 499                                 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
 500                         }
 501                         array_wr32(E1000_IVAR0, index, ivar);
 502                 }
 503                 q_vector->eims_value = 1 << msix_vector;
 504                 break;
 505         default:
 506                 BUG();
 507                 break;
 508         }
 509
 510         /* add q_vector eims value to global eims_enable_mask */
 511         adapter->eims_enable_mask |= q_vector->eims_value;
 512
 513         /* configure q_vector to set itr on first interrupt */
 514         q_vector->set_itr = 1;
 515 }
 516
 517 /**
 518  * igb_configure_msix - Configure MSI-X hardware
 519  *
 520  * igb_configure_msix sets up the hardware to properly
 521  * generate MSI-X interrupts.
 522  **/
 523 static void igb_configure_msix(struct igb_adapter *adapter)
 524 {
 525         u32 tmp;
 526         int i, vector = 0;
 527         struct e1000_hw *hw = &adapter->hw;
 528
 529         adapter->eims_enable_mask = 0;
 530
 531         /* set vector for other causes, i.e. link changes */
 532         switch (hw->mac.type) {
 533         case e1000_82575:
 534                 tmp = rd32(E1000_CTRL_EXT);
 535                 /* enable MSI-X PBA support*/
 536                 tmp |= E1000_CTRL_EXT_PBA_CLR;
 537
 538                 /* Auto-Mask interrupts upon ICR read. */
 539                 tmp |= E1000_CTRL_EXT_EIAME;
 540                 tmp |= E1000_CTRL_EXT_IRCA;
 541
 542                 wr32(E1000_CTRL_EXT, tmp);
 543
 544                 /* enable msix_other interrupt */
 545                 array_wr32(E1000_MSIXBM(0), vector++,
 546                                       E1000_EIMS_OTHER);
 547                 adapter->eims_other = E1000_EIMS_OTHER;
 548
 549                 break;
 550
 551         case e1000_82576:
 552         case e1000_82580:
 553                 /* Turn on MSI-X capability first, or our settings
 554                  * won't stick.  And it will take days to debug. */
 555                 wr32(E1000_GPIE, E1000_GPIE_MSIX_MODE |
 556                                 E1000_GPIE_PBA | E1000_GPIE_EIAME |
 557                                 E1000_GPIE_NSICR);
 558
 559                 /* enable msix_other interrupt */
 560                 adapter->eims_other = 1 << vector;
 561                 tmp = (vector++ | E1000_IVAR_VALID) << 8;
 562
 563                 wr32(E1000_IVAR_MISC, tmp);
 564                 break;
 565         default:
 566                 /* do nothing, since nothing else supports MSI-X */
 567                 break;
 568         } /* switch (hw->mac.type) */
 569
 570         adapter->eims_enable_mask |= adapter->eims_other;
 571
 572         for (i = 0; i < adapter->num_q_vectors; i++)
 573                 igb_assign_vector(adapter->q_vector[i], vector++);
 574
 575         wrfl();
 576 }
 577
 578 /**
 579  * igb_request_msix - Initialize MSI-X interrupts
 580  *
 581  * igb_request_msix allocates MSI-X vectors and requests interrupts from the
 582  * kernel.
 583  **/
 584 static int igb_request_msix(struct igb_adapter *adapter)
 585 {
 586         struct net_device *netdev = adapter->netdev;
 587         struct e1000_hw *hw = &adapter->hw;
 588         int i, err = 0, vector = 0;
 589
 590         err = request_irq(adapter->msix_entries[vector].vector,
 591                           igb_msix_other, 0, netdev->name, adapter);
 592         if (err)
 593                 goto out;
 594         vector++;
 595
 596         for (i = 0; i < adapter->num_q_vectors; i++) {
 597                 struct igb_q_vector *q_vector = adapter->q_vector[i];
 598
 599                 q_vector->itr_register = hw->hw_addr + E1000_EITR(vector);
 600
 601                 if (q_vector->rx_ring && q_vector->tx_ring)
 602                         sprintf(q_vector->name, "%s-TxRx-%u", netdev->name,
 603                                 q_vector->rx_ring->queue_index);
 604                 else if (q_vector->tx_ring)
 605                         sprintf(q_vector->name, "%s-tx-%u", netdev->name,
 606                                 q_vector->tx_ring->queue_index);
 607                 else if (q_vector->rx_ring)
 608                         sprintf(q_vector->name, "%s-rx-%u", netdev->name,
 609                                 q_vector->rx_ring->queue_index);
 610                 else
 611                         sprintf(q_vector->name, "%s-unused", netdev->name);
 612
 613                 err = request_irq(adapter->msix_entries[vector].vector,
 614                                   igb_msix_ring, 0, q_vector->name,
 615                                   q_vector);
 616                 if (err)
 617                         goto out;
 618                 vector++;
 619         }
 620
 621         igb_configure_msix(adapter);
 622         return 0;
 623 out:
 624         return err;
 625 }
 626
 627 static void igb_reset_interrupt_capability(struct igb_adapter *adapter)
 628 {
 629         if (adapter->msix_entries) {
 630                 pci_disable_msix(adapter->pdev);
 631                 kfree(adapter->msix_entries);
 632                 adapter->msix_entries = NULL;
 633         } else if (adapter->flags & IGB_FLAG_HAS_MSI) {
 634                 pci_disable_msi(adapter->pdev);
 635         }
 636 }
 637
 638 /**
 639  * igb_free_q_vectors - Free memory allocated for interrupt vectors
 640  * @adapter: board private structure to initialize
 641  *
 642  * This function frees the memory allocated to the q_vectors.  In addition if
 643  * NAPI is enabled it will delete any references to the NAPI struct prior
 644  * to freeing the q_vector.
 645  **/
 646 static void igb_free_q_vectors(struct igb_adapter *adapter)
 647 {
 648         int v_idx;
 649
 650         for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
 651                 struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
 652                 adapter->q_vector[v_idx] = NULL;
 653                 if (!q_vector)
 654                         continue;
 655                 netif_napi_del(&q_vector->napi);
 656                 kfree(q_vector);
 657         }
 658         adapter->num_q_vectors = 0;
 659 }
 660
 661 /**
 662  * igb_clear_interrupt_scheme - reset the device to a state of no interrupts
 663  *
 664  * This function resets the device so that it has 0 rx queues, tx queues, and
 665  * MSI-X interrupts allocated.
 666  */
 667 static void igb_clear_interrupt_scheme(struct igb_adapter *adapter)
 668 {
 669         igb_free_queues(adapter);
 670         igb_free_q_vectors(adapter);
 671         igb_reset_interrupt_capability(adapter);
 672 }
 673
 674 /**
 675  * igb_set_interrupt_capability - set MSI or MSI-X if supported
 676  *
 677  * Attempt to configure interrupts using the best available
 678  * capabilities of the hardware and kernel.
 679  **/
 680 static void igb_set_interrupt_capability(struct igb_adapter *adapter)
 681 {
 682         int err;
 683         int numvecs, i;
 684
 685         /* Number of supported queues. */
 686         adapter->num_rx_queues = adapter->rss_queues;
 687         adapter->num_tx_queues = adapter->rss_queues;
 688
 689         /* start with one vector for every rx queue */
 690         numvecs = adapter->num_rx_queues;
 691
 692         /* if tx handler is separate add 1 for every tx queue */
 693         if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS))
 694                 numvecs += adapter->num_tx_queues;
 695
 696         /* store the number of vectors reserved for queues */
 697         adapter->num_q_vectors = numvecs;
 698
 699         /* add 1 vector for link status interrupts */
 700         numvecs++;
 701         adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry),
 702                                         GFP_KERNEL);
 703         if (!adapter->msix_entries)
 704                 goto msi_only;
 705
 706         for (i = 0; i < numvecs; i++)
 707                 adapter->msix_entries[i].entry = i;
 708
 709         err = pci_enable_msix(adapter->pdev,
 710                               adapter->msix_entries,
 711                               numvecs);
 712         if (err == 0)
 713                 goto out;
 714
 715         igb_reset_interrupt_capability(adapter);
 716
 717         /* If we can't do MSI-X, try MSI */
 718 msi_only:
 719 #ifdef CONFIG_PCI_IOV
 720         /* disable SR-IOV for non MSI-X configurations */
 721         if (adapter->vf_data) {
 722                 struct e1000_hw *hw = &adapter->hw;
 723                 /* disable iov and allow time for transactions to clear */
 724                 pci_disable_sriov(adapter->pdev);
 725                 msleep(500);
 726
 727                 kfree(adapter->vf_data);
 728                 adapter->vf_data = NULL;
 729                 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ);
 730                 msleep(100);
 731                 dev_info(&adapter->pdev->dev, "IOV Disabled\n");
 732         }
 733 #endif
 734         adapter->vfs_allocated_count = 0;
 735         adapter->rss_queues = 1;
 736         adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
 737         adapter->num_rx_queues = 1;
 738         adapter->num_tx_queues = 1;
 739         adapter->num_q_vectors = 1;
 740         if (!pci_enable_msi(adapter->pdev))
 741                 adapter->flags |= IGB_FLAG_HAS_MSI;
 742 out:
 743         /* Notify the stack of the (possibly) reduced Tx Queue count. */
 744         adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
 745         return;
 746 }
 747
 748 /**
 749  * igb_alloc_q_vectors - Allocate memory for interrupt vectors
 750  * @adapter: board private structure to initialize
 751  *
 752  * We allocate one q_vector per queue interrupt.  If allocation fails we
 753  * return -ENOMEM.
 754  **/
 755 static int igb_alloc_q_vectors(struct igb_adapter *adapter)
 756 {
 757         struct igb_q_vector *q_vector;
 758         struct e1000_hw *hw = &adapter->hw;
 759         int v_idx;
 760
 761         for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
 762                 q_vector = kzalloc(sizeof(struct igb_q_vector), GFP_KERNEL);
 763                 if (!q_vector)
 764                         goto err_out;
 765                 q_vector->adapter = adapter;
 766                 q_vector->itr_register = hw->hw_addr + E1000_EITR(0);
 767                 q_vector->itr_val = IGB_START_ITR;
 768                 netif_napi_add(adapter->netdev, &q_vector->napi, igb_poll, 64);
 769                 adapter->q_vector[v_idx] = q_vector;
 770         }
 771         return 0;
 772
 773 err_out:
 774         igb_free_q_vectors(adapter);
 775         return -ENOMEM;
 776 }
 777
 778 static void igb_map_rx_ring_to_vector(struct igb_adapter *adapter,
 779                                       int ring_idx, int v_idx)
 780 {
 781         struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
 782
 783         q_vector->rx_ring = adapter->rx_ring[ring_idx];
 784         q_vector->rx_ring->q_vector = q_vector;
 785         q_vector->itr_val = adapter->rx_itr_setting;
 786         if (q_vector->itr_val && q_vector->itr_val <= 3)
 787                 q_vector->itr_val = IGB_START_ITR;
 788 }
 789
 790 static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter,
 791                                       int ring_idx, int v_idx)
 792 {
 793         struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
 794
 795         q_vector->tx_ring = adapter->tx_ring[ring_idx];
 796         q_vector->tx_ring->q_vector = q_vector;
 797         q_vector->itr_val = adapter->tx_itr_setting;
 798         if (q_vector->itr_val && q_vector->itr_val <= 3)
 799                 q_vector->itr_val = IGB_START_ITR;
 800 }
 801
 802 /**
 803  * igb_map_ring_to_vector - maps allocated queues to vectors
 804  *
 805  * This function maps the recently allocated queues to vectors.
 806  **/
 807 static int igb_map_ring_to_vector(struct igb_adapter *adapter)
 808 {
 809         int i;
 810         int v_idx = 0;
 811
 812         if ((adapter->num_q_vectors < adapter->num_rx_queues) ||
 813             (adapter->num_q_vectors < adapter->num_tx_queues))
 814                 return -ENOMEM;
 815
 816         if (adapter->num_q_vectors >=
 817             (adapter->num_rx_queues + adapter->num_tx_queues)) {
 818                 for (i = 0; i < adapter->num_rx_queues; i++)
 819                         igb_map_rx_ring_to_vector(adapter, i, v_idx++);
 820                 for (i = 0; i < adapter->num_tx_queues; i++)
 821                         igb_map_tx_ring_to_vector(adapter, i, v_idx++);
 822         } else {
 823                 for (i = 0; i < adapter->num_rx_queues; i++) {
 824                         if (i < adapter->num_tx_queues)
 825                                 igb_map_tx_ring_to_vector(adapter, i, v_idx);
 826                         igb_map_rx_ring_to_vector(adapter, i, v_idx++);
 827                 }
 828                 for (; i < adapter->num_tx_queues; i++)
 829                         igb_map_tx_ring_to_vector(adapter, i, v_idx++);
 830         }
 831         return 0;
 832 }
 833
 834 /**
 835  * igb_init_interrupt_scheme - initialize interrupts, allocate queues/vectors
 836  *
 837  * This function initializes the interrupts and allocates all of the queues.
 838  **/
 839 static int igb_init_interrupt_scheme(struct igb_adapter *adapter)
 840 {
 841         struct pci_dev *pdev = adapter->pdev;
 842         int err;
 843
 844         igb_set_interrupt_capability(adapter);
 845
 846         err = igb_alloc_q_vectors(adapter);
 847         if (err) {
 848                 dev_err(&pdev->dev, "Unable to allocate memory for vectors\n");
 849                 goto err_alloc_q_vectors;
 850         }
 851
 852         err = igb_alloc_queues(adapter);
 853         if (err) {
 854                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
 855                 goto err_alloc_queues;
 856         }
 857
 858         err = igb_map_ring_to_vector(adapter);
 859         if (err) {
 860                 dev_err(&pdev->dev, "Invalid q_vector to ring mapping\n");
 861                 goto err_map_queues;
 862         }
 863
 864
 865         return 0;
 866 err_map_queues:
 867         igb_free_queues(adapter);
 868 err_alloc_queues:
 869         igb_free_q_vectors(adapter);
 870 err_alloc_q_vectors:
 871         igb_reset_interrupt_capability(adapter);
 872         return err;
 873 }
 874
 875 /**
 876  * igb_request_irq - initialize interrupts
 877  *
 878  * Attempts to configure interrupts using the best available
 879  * capabilities of the hardware and kernel.
 880  **/
 881 static int igb_request_irq(struct igb_adapter *adapter)
 882 {
 883         struct net_device *netdev = adapter->netdev;
 884         struct pci_dev *pdev = adapter->pdev;
 885         int err = 0;
 886
 887         if (adapter->msix_entries) {
 888                 err = igb_request_msix(adapter);
 889                 if (!err)
 890                         goto request_done;
 891                 /* fall back to MSI */
 892                 igb_clear_interrupt_scheme(adapter);
 893                 if (!pci_enable_msi(adapter->pdev))
 894                         adapter->flags |= IGB_FLAG_HAS_MSI;
 895                 igb_free_all_tx_resources(adapter);
 896                 igb_free_all_rx_resources(adapter);
 897                 adapter->num_tx_queues = 1;
 898                 adapter->num_rx_queues = 1;
 899                 adapter->num_q_vectors = 1;
 900                 err = igb_alloc_q_vectors(adapter);
 901                 if (err) {
 902                         dev_err(&pdev->dev,
 903                                 "Unable to allocate memory for vectors\n");
 904                         goto request_done;
 905                 }
 906                 err = igb_alloc_queues(adapter);
 907                 if (err) {
 908                         dev_err(&pdev->dev,
 909                                 "Unable to allocate memory for queues\n");
 910                         igb_free_q_vectors(adapter);
 911                         goto request_done;
 912                 }
 913                 igb_setup_all_tx_resources(adapter);
 914                 igb_setup_all_rx_resources(adapter);
 915         } else {
 916                 igb_assign_vector(adapter->q_vector[0], 0);
 917         }
 918
 919         if (adapter->flags & IGB_FLAG_HAS_MSI) {
 920                 err = request_irq(adapter->pdev->irq, igb_intr_msi, 0,
 921                                   netdev->name, adapter);
 922                 if (!err)
 923                         goto request_done;
 924
 925                 /* fall back to legacy interrupts */
 926                 igb_reset_interrupt_capability(adapter);
 927                 adapter->flags &= ~IGB_FLAG_HAS_MSI;
 928         }
 929
 930         err = request_irq(adapter->pdev->irq, igb_intr, IRQF_SHARED,
 931                           netdev->name, adapter);
 932
 933         if (err)
 934                 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
 935                         err);
 936
 937 request_done:
 938         return err;
 939 }
 940
 941 static void igb_free_irq(struct igb_adapter *adapter)
 942 {
 943         if (adapter->msix_entries) {
 944                 int vector = 0, i;
 945
 946                 free_irq(adapter->msix_entries[vector++].vector, adapter);
 947
 948                 for (i = 0; i < adapter->num_q_vectors; i++) {
 949                         struct igb_q_vector *q_vector = adapter->q_vector[i];
 950                         free_irq(adapter->msix_entries[vector++].vector,
 951                                  q_vector);
 952                 }
 953         } else {
 954                 free_irq(adapter->pdev->irq, adapter);
 955         }
 956 }
 957
 958 /**
 959  * igb_irq_disable - Mask off interrupt generation on the NIC
 960  * @adapter: board private structure
 961  **/
 962 static void igb_irq_disable(struct igb_adapter *adapter)
 963 {
 964         struct e1000_hw *hw = &adapter->hw;
 965
 966         /*
 967          * we need to be careful when disabling interrupts.  The VFs are also
 968          * mapped into these registers and so clearing the bits can cause
 969          * issues on the VF drivers so we only need to clear what we set
 970          */
 971         if (adapter->msix_entries) {
 972                 u32 regval = rd32(E1000_EIAM);
 973                 wr32(E1000_EIAM, regval & ~adapter->eims_enable_mask);
 974                 wr32(E1000_EIMC, adapter->eims_enable_mask);
 975                 regval = rd32(E1000_EIAC);
 976                 wr32(E1000_EIAC, regval & ~adapter->eims_enable_mask);
 977         }
 978
 979         wr32(E1000_IAM, 0);
 980         wr32(E1000_IMC, ~0);
 981         wrfl();
 982         synchronize_irq(adapter->pdev->irq);
 983 }
 984
 985 /**
 986  * igb_irq_enable - Enable default interrupt generation settings
 987  * @adapter: board private structure
 988  **/
 989 static void igb_irq_enable(struct igb_adapter *adapter)
 990 {
 991         struct e1000_hw *hw = &adapter->hw;
 992
 993         if (adapter->msix_entries) {
 994                 u32 ims = E1000_IMS_LSC | E1000_IMS_DOUTSYNC;
 995                 u32 regval = rd32(E1000_EIAC);
 996                 wr32(E1000_EIAC, regval | adapter->eims_enable_mask);
 997                 regval = rd32(E1000_EIAM);
 998                 wr32(E1000_EIAM, regval | adapter->eims_enable_mask);
 999                 wr32(E1000_EIMS, adapter->eims_enable_mask);
1000                 if (adapter->vfs_allocated_count) {
1001                         wr32(E1000_MBVFIMR, 0xFF);
1002                         ims |= E1000_IMS_VMMB;
1003                 }
1004                 if (adapter->hw.mac.type == e1000_82580)
1005                         ims |= E1000_IMS_DRSTA;
1006
1007                 wr32(E1000_IMS, ims);
1008         } else {
1009                 wr32(E1000_IMS, IMS_ENABLE_MASK |
1010                                 E1000_IMS_DRSTA);
1011                 wr32(E1000_IAM, IMS_ENABLE_MASK |
1012                                 E1000_IMS_DRSTA);
1013         }
1014 }
1015
1016 static void igb_update_mng_vlan(struct igb_adapter *adapter)
1017 {
1018         struct e1000_hw *hw = &adapter->hw;
1019         u16 vid = adapter->hw.mng_cookie.vlan_id;
1020         u16 old_vid = adapter->mng_vlan_id;
1021
1022         if (hw->mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
1023                 /* add VID to filter table */
1024                 igb_vfta_set(hw, vid, true);
1025                 adapter->mng_vlan_id = vid;
1026         } else {
1027                 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
1028         }
1029
1030         if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
1031             (vid != old_vid) &&
1032             !vlan_group_get_device(adapter->vlgrp, old_vid)) {
1033                 /* remove VID from filter table */
1034                 igb_vfta_set(hw, old_vid, false);
1035         }
1036 }
1037
1038 /**
1039  * igb_release_hw_control - release control of the h/w to f/w
1040  * @adapter: address of board private structure
1041  *
1042  * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
1043  * For ASF and Pass Through versions of f/w this means that the
1044  * driver is no longer loaded.
1045  *
1046  **/
1047 static void igb_release_hw_control(struct igb_adapter *adapter)
1048 {
1049         struct e1000_hw *hw = &adapter->hw;
1050         u32 ctrl_ext;
1051
1052         /* Let firmware take over control of h/w */
1053         ctrl_ext = rd32(E1000_CTRL_EXT);
1054         wr32(E1000_CTRL_EXT,
1055                         ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1056 }
1057
1058 /**
1059  * igb_get_hw_control - get control of the h/w from f/w
1060  * @adapter: address of board private structure
1061  *
1062  * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
1063  * For ASF and Pass Through versions of f/w this means that
1064  * the driver is loaded.
1065  *
1066  **/
1067 static void igb_get_hw_control(struct igb_adapter *adapter)
1068 {
1069         struct e1000_hw *hw = &adapter->hw;
1070         u32 ctrl_ext;
1071
1072         /* Let firmware know the driver has taken over */
1073         ctrl_ext = rd32(E1000_CTRL_EXT);
1074         wr32(E1000_CTRL_EXT,
1075                         ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1076 }
1077
1078 /**
1079  * igb_configure - configure the hardware for RX and TX
1080  * @adapter: private board structure
1081  **/
1082 static void igb_configure(struct igb_adapter *adapter)
1083 {
1084         struct net_device *netdev = adapter->netdev;
1085         int i;
1086
1087         igb_get_hw_control(adapter);
1088         igb_set_rx_mode(netdev);
1089
1090         igb_restore_vlan(adapter);
1091
1092         igb_setup_tctl(adapter);
1093         igb_setup_mrqc(adapter);
1094         igb_setup_rctl(adapter);
1095
1096         igb_configure_tx(adapter);
1097         igb_configure_rx(adapter);
1098
1099         igb_rx_fifo_flush_82575(&adapter->hw);
1100
1101         /* call igb_desc_unused which always leaves
1102          * at least 1 descriptor unused to make sure
1103          * next_to_use != next_to_clean */
1104         for (i = 0; i < adapter->num_rx_queues; i++) {
1105                 struct igb_ring *ring = adapter->rx_ring[i];
1106                 igb_alloc_rx_buffers_adv(ring, igb_desc_unused(ring));
1107         }
1108 }
1109
1110 /**
1111  * igb_power_up_link - Power up the phy/serdes link
1112  * @adapter: address of board private structure
1113  **/
1114 void igb_power_up_link(struct igb_adapter *adapter)
1115 {
1116         if (adapter->hw.phy.media_type == e1000_media_type_copper)
1117                 igb_power_up_phy_copper(&adapter->hw);
1118         else
1119                 igb_power_up_serdes_link_82575(&adapter->hw);
1120 }
1121
1122 /**
1123  * igb_power_down_link - Power down the phy/serdes link
1124  * @adapter: address of board private structure
1125  */
1126 static void igb_power_down_link(struct igb_adapter *adapter)
1127 {
1128         if (adapter->hw.phy.media_type == e1000_media_type_copper)
1129                 igb_power_down_phy_copper_82575(&adapter->hw);
1130         else
1131                 igb_shutdown_serdes_link_82575(&adapter->hw);
1132 }
1133
1134 /**
1135  * igb_up - Open the interface and prepare it to handle traffic
1136  * @adapter: board private structure
1137  **/
1138 int igb_up(struct igb_adapter *adapter)
1139 {
1140         struct e1000_hw *hw = &adapter->hw;
1141         int i;
1142
1143         /* hardware has been reset, we need to reload some things */
1144         igb_configure(adapter);
1145
1146         clear_bit(__IGB_DOWN, &adapter->state);
1147
1148         for (i = 0; i < adapter->num_q_vectors; i++) {
1149                 struct igb_q_vector *q_vector = adapter->q_vector[i];
1150                 napi_enable(&q_vector->napi);
1151         }
1152         if (adapter->msix_entries)
1153                 igb_configure_msix(adapter);
1154         else
1155                 igb_assign_vector(adapter->q_vector[0], 0);
1156
1157         /* Clear any pending interrupts. */
1158         rd32(E1000_ICR);
1159         igb_irq_enable(adapter);
1160
1161         /* notify VFs that reset has been completed */
1162         if (adapter->vfs_allocated_count) {
1163                 u32 reg_data = rd32(E1000_CTRL_EXT);
1164                 reg_data |= E1000_CTRL_EXT_PFRSTD;
1165                 wr32(E1000_CTRL_EXT, reg_data);
1166         }
1167
1168         netif_tx_start_all_queues(adapter->netdev);
1169
1170         /* start the watchdog. */
1171         hw->mac.get_link_status = 1;
1172         schedule_work(&adapter->watchdog_task);
1173
1174         return 0;
1175 }
1176
1177 void igb_down(struct igb_adapter *adapter)
1178 {
1179         struct net_device *netdev = adapter->netdev;
1180         struct e1000_hw *hw = &adapter->hw;
1181         u32 tctl, rctl;
1182         int i;
1183
1184         /* signal that we're down so the interrupt handler does not
1185          * reschedule our watchdog timer */
1186         set_bit(__IGB_DOWN, &adapter->state);
1187
1188         /* disable receives in the hardware */
1189         rctl = rd32(E1000_RCTL);
1190         wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
1191         /* flush and sleep below */
1192
1193         netif_tx_stop_all_queues(netdev);
1194
1195         /* disable transmits in the hardware */
1196         tctl = rd32(E1000_TCTL);
1197         tctl &= ~E1000_TCTL_EN;
1198         wr32(E1000_TCTL, tctl);
1199         /* flush both disables and wait for them to finish */
1200         wrfl();
1201         msleep(10);
1202
1203         for (i = 0; i < adapter->num_q_vectors; i++) {
1204                 struct igb_q_vector *q_vector = adapter->q_vector[i];
1205                 napi_disable(&q_vector->napi);
1206         }
1207
1208         igb_irq_disable(adapter);
1209
1210         del_timer_sync(&adapter->watchdog_timer);
1211         del_timer_sync(&adapter->phy_info_timer);
1212
1213         netif_carrier_off(netdev);
1214
1215         /* record the stats before reset*/
1216         igb_update_stats(adapter);
1217
1218         adapter->link_speed = 0;
1219         adapter->link_duplex = 0;
1220
1221         if (!pci_channel_offline(adapter->pdev))
1222                 igb_reset(adapter);
1223         igb_clean_all_tx_rings(adapter);
1224         igb_clean_all_rx_rings(adapter);
1225 #ifdef CONFIG_IGB_DCA
1226
1227         /* since we reset the hardware DCA settings were cleared */
1228         igb_setup_dca(adapter);
1229 #endif
1230 }
1231
1232 void igb_reinit_locked(struct igb_adapter *adapter)
1233 {
1234         WARN_ON(in_interrupt());
1235         while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
1236                 msleep(1);
1237         igb_down(adapter);
1238         igb_up(adapter);
1239         clear_bit(__IGB_RESETTING, &adapter->state);
1240 }
1241
1242 void igb_reset(struct igb_adapter *adapter)
1243 {
1244         struct pci_dev *pdev = adapter->pdev;
1245         struct e1000_hw *hw = &adapter->hw;
1246         struct e1000_mac_info *mac = &hw->mac;
1247         struct e1000_fc_info *fc = &hw->fc;
1248         u32 pba = 0, tx_space, min_tx_space, min_rx_space;
1249         u16 hwm;
1250
1251         /* Repartition Pba for greater than 9k mtu
1252          * To take effect CTRL.RST is required.
1253          */
1254         switch (mac->type) {
1255         case e1000_82580:
1256                 pba = rd32(E1000_RXPBS);
1257                 pba = igb_rxpbs_adjust_82580(pba);
1258                 break;
1259         case e1000_82576:
1260                 pba = rd32(E1000_RXPBS);
1261                 pba &= E1000_RXPBS_SIZE_MASK_82576;
1262                 break;
1263         case e1000_82575:
1264         default:
1265                 pba = E1000_PBA_34K;
1266                 break;
1267         }
1268
1269         if ((adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) &&
1270             (mac->type < e1000_82576)) {
1271                 /* adjust PBA for jumbo frames */
1272                 wr32(E1000_PBA, pba);
1273
1274                 /* To maintain wire speed transmits, the Tx FIFO should be
1275                  * large enough to accommodate two full transmit packets,
1276                  * rounded up to the next 1KB and expressed in KB.  Likewise,
1277                  * the Rx FIFO should be large enough to accommodate at least
1278                  * one full receive packet and is similarly rounded up and
1279                  * expressed in KB. */
1280                 pba = rd32(E1000_PBA);
1281                 /* upper 16 bits has Tx packet buffer allocation size in KB */
1282                 tx_space = pba >> 16;
1283                 /* lower 16 bits has Rx packet buffer allocation size in KB */
1284                 pba &= 0xffff;
1285                 /* the tx fifo also stores 16 bytes of information about the tx
1286                  * but don't include ethernet FCS because hardware appends it */
1287                 min_tx_space = (adapter->max_frame_size +
1288                                 sizeof(union e1000_adv_tx_desc) -
1289                                 ETH_FCS_LEN) * 2;
1290                 min_tx_space = ALIGN(min_tx_space, 1024);
1291                 min_tx_space >>= 10;
1292                 /* software strips receive CRC, so leave room for it */
1293                 min_rx_space = adapter->max_frame_size;
1294                 min_rx_space = ALIGN(min_rx_space, 1024);
1295                 min_rx_space >>= 10;
1296
1297                 /* If current Tx allocation is less than the min Tx FIFO size,
1298                  * and the min Tx FIFO size is less than the current Rx FIFO
1299                  * allocation, take space away from current Rx allocation */
1300                 if (tx_space < min_tx_space &&
1301                     ((min_tx_space - tx_space) < pba)) {
1302                         pba = pba - (min_tx_space - tx_space);
1303
1304                         /* if short on rx space, rx wins and must trump tx
1305                          * adjustment */
1306                         if (pba < min_rx_space)
1307                                 pba = min_rx_space;
1308                 }
1309                 wr32(E1000_PBA, pba);
1310         }
1311
1312         /* flow control settings */
1313         /* The high water mark must be low enough to fit one full frame
1314          * (or the size used for early receive) above it in the Rx FIFO.
1315          * Set it to the lower of:
1316          * - 90% of the Rx FIFO size, or
1317          * - the full Rx FIFO size minus one full frame */
1318         hwm = min(((pba << 10) * 9 / 10),
1319                         ((pba << 10) - 2 * adapter->max_frame_size));
1320
1321         fc->high_water = hwm & 0xFFF0;  /* 16-byte granularity */
1322         fc->low_water = fc->high_water - 16;
1323         fc->pause_time = 0xFFFF;
1324         fc->send_xon = 1;
1325         fc->current_mode = fc->requested_mode;
1326
1327         /* disable receive for all VFs and wait one second */
1328         if (adapter->vfs_allocated_count) {
1329                 int i;
1330                 for (i = 0 ; i < adapter->vfs_allocated_count; i++)
1331                         adapter->vf_data[i].flags = 0;
1332
1333                 /* ping all the active vfs to let them know we are going down */
1334                 igb_ping_all_vfs(adapter);
1335
1336                 /* disable transmits and receives */
1337                 wr32(E1000_VFRE, 0);
1338                 wr32(E1000_VFTE, 0);
1339         }
1340
1341         /* Allow time for pending master requests to run */
1342         hw->mac.ops.reset_hw(hw);
1343         wr32(E1000_WUC, 0);
1344
1345         if (hw->mac.ops.init_hw(hw))
1346                 dev_err(&pdev->dev, "Hardware Error\n");
1347
1348         if (hw->mac.type == e1000_82580) {
1349                 u32 reg = rd32(E1000_PCIEMISC);
1350                 wr32(E1000_PCIEMISC,
1351                                 reg & ~E1000_PCIEMISC_LX_DECISION);
1352         }
1353         if (!netif_running(adapter->netdev))
1354                 igb_power_down_link(adapter);
1355
1356         igb_update_mng_vlan(adapter);
1357
1358         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
1359         wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE);
1360
1361         igb_get_phy_info(hw);
1362 }
1363
1364 static const struct net_device_ops igb_netdev_ops = {
1365         .ndo_open               = igb_open,
1366         .ndo_stop               = igb_close,
1367         .ndo_start_xmit         = igb_xmit_frame_adv,
1368         .ndo_get_stats          = igb_get_stats,
1369         .ndo_set_rx_mode        = igb_set_rx_mode,
1370         .ndo_set_multicast_list = igb_set_rx_mode,
1371         .ndo_set_mac_address    = igb_set_mac,
1372         .ndo_change_mtu         = igb_change_mtu,
1373         .ndo_do_ioctl           = igb_ioctl,
1374         .ndo_tx_timeout         = igb_tx_timeout,
1375         .ndo_validate_addr      = eth_validate_addr,
1376         .ndo_vlan_rx_register   = igb_vlan_rx_register,
1377         .ndo_vlan_rx_add_vid    = igb_vlan_rx_add_vid,
1378         .ndo_vlan_rx_kill_vid   = igb_vlan_rx_kill_vid,
1379         .ndo_set_vf_mac         = igb_ndo_set_vf_mac,
1380         .ndo_set_vf_vlan        = igb_ndo_set_vf_vlan,
1381         .ndo_set_vf_tx_rate     = igb_ndo_set_vf_bw,
1382         .ndo_get_vf_config      = igb_ndo_get_vf_config,
1383 #ifdef CONFIG_NET_POLL_CONTROLLER
1384         .ndo_poll_controller    = igb_netpoll,
1385 #endif
1386 };
1387
1388 /**
1389  * igb_probe - Device Initialization Routine
1390  * @pdev: PCI device information struct
1391  * @ent: entry in igb_pci_tbl
1392  *
1393  * Returns 0 on success, negative on failure
1394  *
1395  * igb_probe initializes an adapter identified by a pci_dev structure.
1396  * The OS initialization, configuring of the adapter private structure,
1397  * and a hardware reset occur.
1398  **/
1399 static int __devinit igb_probe(struct pci_dev *pdev,
1400                                const struct pci_device_id *ent)
1401 {
1402         struct net_device *netdev;
1403         struct igb_adapter *adapter;
1404         struct e1000_hw *hw;
1405         u16 eeprom_data = 0;
1406         static int global_quad_port_a; /* global quad port a indication */
1407         const struct e1000_info *ei = igb_info_tbl[ent->driver_data];
1408         unsigned long mmio_start, mmio_len;
1409         int err, pci_using_dac;
1410         u16 eeprom_apme_mask = IGB_EEPROM_APME;
1411         u32 part_num;
1412
1413         err = pci_enable_device_mem(pdev);
1414         if (err)
1415                 return err;
1416
1417         pci_using_dac = 0;
1418         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
1419         if (!err) {
1420                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
1421                 if (!err)
1422                         pci_using_dac = 1;
1423         } else {
1424                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1425                 if (err) {
1426                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1427                         if (err) {
1428                                 dev_err(&pdev->dev, "No usable DMA "
1429                                         "configuration, aborting\n");
1430                                 goto err_dma;
1431                         }
1432                 }
1433         }
1434
1435         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
1436                                            IORESOURCE_MEM),
1437                                            igb_driver_name);
1438         if (err)
1439                 goto err_pci_reg;
1440
1441         pci_enable_pcie_error_reporting(pdev);
1442
1443         pci_set_master(pdev);
1444         pci_save_state(pdev);
1445
1446         err = -ENOMEM;
1447         netdev = alloc_etherdev_mq(sizeof(struct igb_adapter),
1448                                    IGB_ABS_MAX_TX_QUEUES);
1449         if (!netdev)
1450                 goto err_alloc_etherdev;
1451
1452         SET_NETDEV_DEV(netdev, &pdev->dev);
1453
1454         pci_set_drvdata(pdev, netdev);
1455         adapter = netdev_priv(netdev);
1456         adapter->netdev = netdev;
1457         adapter->pdev = pdev;
1458         hw = &adapter->hw;
1459         hw->back = adapter;
1460         adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;
1461
1462         mmio_start = pci_resource_start(pdev, 0);
1463         mmio_len = pci_resource_len(pdev, 0);
1464
1465         err = -EIO;
1466         hw->hw_addr = ioremap(mmio_start, mmio_len);
1467         if (!hw->hw_addr)
1468                 goto err_ioremap;
1469
1470         netdev->netdev_ops = &igb_netdev_ops;
1471         igb_set_ethtool_ops(netdev);
1472         netdev->watchdog_timeo = 5 * HZ;
1473
1474         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1475
1476         netdev->mem_start = mmio_start;
1477         netdev->mem_end = mmio_start + mmio_len;
1478
1479         /* PCI config space info */
1480         hw->vendor_id = pdev->vendor;
1481         hw->device_id = pdev->device;
1482         hw->revision_id = pdev->revision;
1483         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1484         hw->subsystem_device_id = pdev->subsystem_device;
1485
1486         /* Copy the default MAC, PHY and NVM function pointers */
1487         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
1488         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
1489         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
1490         /* Initialize skew-specific constants */
1491         err = ei->get_invariants(hw);
1492         if (err)
1493                 goto err_sw_init;
1494
1495         /* setup the private structure */
1496         err = igb_sw_init(adapter);
1497         if (err)
1498                 goto err_sw_init;
1499
1500         igb_get_bus_info_pcie(hw);
1501
1502         hw->phy.autoneg_wait_to_complete = false;
1503
1504         /* Copper options */
1505         if (hw->phy.media_type == e1000_media_type_copper) {
1506                 hw->phy.mdix = AUTO_ALL_MODES;
1507                 hw->phy.disable_polarity_correction = false;
1508                 hw->phy.ms_type = e1000_ms_hw_default;
1509         }
1510
1511         if (igb_check_reset_block(hw))
1512                 dev_info(&pdev->dev,
1513                         "PHY reset is blocked due to SOL/IDER session.\n");
1514
1515         netdev->features = NETIF_F_SG |
1516                            NETIF_F_IP_CSUM |
1517                            NETIF_F_HW_VLAN_TX |
1518                            NETIF_F_HW_VLAN_RX |
1519                            NETIF_F_HW_VLAN_FILTER;
1520
1521         netdev->features |= NETIF_F_IPV6_CSUM;
1522         netdev->features |= NETIF_F_TSO;
1523         netdev->features |= NETIF_F_TSO6;
1524         netdev->features |= NETIF_F_GRO;
1525
1526         netdev->vlan_features |= NETIF_F_TSO;
1527         netdev->vlan_features |= NETIF_F_TSO6;
1528         netdev->vlan_features |= NETIF_F_IP_CSUM;
1529         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
1530         netdev->vlan_features |= NETIF_F_SG;
1531
1532         if (pci_using_dac)
1533                 netdev->features |= NETIF_F_HIGHDMA;
1534
1535         if (hw->mac.type >= e1000_82576)
1536                 netdev->features |= NETIF_F_SCTP_CSUM;
1537
1538         adapter->en_mng_pt = igb_enable_mng_pass_thru(hw);
1539
1540         /* before reading the NVM, reset the controller to put the device in a
1541          * known good starting state */
1542         hw->mac.ops.reset_hw(hw);
1543
1544         /* make sure the NVM is good */
1545         if (igb_validate_nvm_checksum(hw) < 0) {
1546                 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
1547                 err = -EIO;
1548                 goto err_eeprom;
1549         }
1550
1551         /* copy the MAC address out of the NVM */
1552         if (hw->mac.ops.read_mac_addr(hw))
1553                 dev_err(&pdev->dev, "NVM Read Error\n");
1554
1555         memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
1556         memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
1557
1558         if (!is_valid_ether_addr(netdev->perm_addr)) {
1559                 dev_err(&pdev->dev, "Invalid MAC Address\n");
1560                 err = -EIO;
1561                 goto err_eeprom;
1562         }
1563
1564         setup_timer(&adapter->watchdog_timer, &igb_watchdog,
1565                     (unsigned long) adapter);
1566         setup_timer(&adapter->phy_info_timer, &igb_update_phy_info,
1567                     (unsigned long) adapter);
1568
1569         INIT_WORK(&adapter->reset_task, igb_reset_task);
1570         INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
1571
1572         /* Initialize link properties that are user-changeable */
1573         adapter->fc_autoneg = true;
1574         hw->mac.autoneg = true;
1575         hw->phy.autoneg_advertised = 0x2f;
1576
1577         hw->fc.requested_mode = e1000_fc_default;
1578         hw->fc.current_mode = e1000_fc_default;
1579
1580         igb_validate_mdi_setting(hw);
1581
1582         /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1583          * enable the ACPI Magic Packet filter
1584          */
1585
1586         if (hw->bus.func == 0)
1587                 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1588         else if (hw->mac.type == e1000_82580)
1589                 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
1590                                  NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
1591                                  &eeprom_data);
1592         else if (hw->bus.func == 1)
1593                 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1594
1595         if (eeprom_data & eeprom_apme_mask)
1596                 adapter->eeprom_wol |= E1000_WUFC_MAG;
1597
1598         /* now that we have the eeprom settings, apply the special cases where
1599          * the eeprom may be wrong or the board simply won't support wake on
1600          * lan on a particular port */
1601         switch (pdev->device) {
1602         case E1000_DEV_ID_82575GB_QUAD_COPPER:
1603                 adapter->eeprom_wol = 0;
1604                 break;
1605         case E1000_DEV_ID_82575EB_FIBER_SERDES:
1606         case E1000_DEV_ID_82576_FIBER:
1607         case E1000_DEV_ID_82576_SERDES:
1608                 /* Wake events only supported on port A for dual fiber
1609                  * regardless of eeprom setting */
1610                 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1)
1611                         adapter->eeprom_wol = 0;
1612                 break;
1613         case E1000_DEV_ID_82576_QUAD_COPPER:
1614                 /* if quad port adapter, disable WoL on all but port A */
1615                 if (global_quad_port_a != 0)
1616                         adapter->eeprom_wol = 0;
1617                 else
1618                         adapter->flags |= IGB_FLAG_QUAD_PORT_A;
1619                 /* Reset for multiple quad port adapters */
1620                 if (++global_quad_port_a == 4)
1621                         global_quad_port_a = 0;
1622                 break;
1623         }
1624
1625         /* initialize the wol settings based on the eeprom settings */
1626         adapter->wol = adapter->eeprom_wol;
1627         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1628
1629         /* reset the hardware with the new settings */
1630         igb_reset(adapter);
1631
1632         /* let the f/w know that the h/w is now under the control of the
1633          * driver. */
1634         igb_get_hw_control(adapter);
1635
1636         strcpy(netdev->name, "eth%d");
1637         err = register_netdev(netdev);
1638         if (err)
1639                 goto err_register;
1640
1641         /* carrier off reporting is important to ethtool even BEFORE open */
1642         netif_carrier_off(netdev);
1643
1644 #ifdef CONFIG_IGB_DCA
1645         if (dca_add_requester(&pdev->dev) == 0) {
1646                 adapter->flags |= IGB_FLAG_DCA_ENABLED;
1647                 dev_info(&pdev->dev, "DCA enabled\n");
1648                 igb_setup_dca(adapter);
1649         }
1650
1651 #endif
1652         dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
1653         /* print bus type/speed/width info */
1654         dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n",
1655                  netdev->name,
1656                  ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1657                                                             "unknown"),
1658                  ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
1659                   (hw->bus.width == e1000_bus_width_pcie_x2) ? "Width x2" :
1660                   (hw->bus.width == e1000_bus_width_pcie_x1) ? "Width x1" :
1661                    "unknown"),
1662                  netdev->dev_addr);
1663
1664         igb_read_part_num(hw, &part_num);
1665         dev_info(&pdev->dev, "%s: PBA No: %06x-%03x\n", netdev->name,
1666                 (part_num >> 8), (part_num & 0xff));
1667
1668         dev_info(&pdev->dev,
1669                 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
1670                 adapter->msix_entries ? "MSI-X" :
1671                 (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy",
1672                 adapter->num_rx_queues, adapter->num_tx_queues);
1673
1674         return 0;
1675
1676 err_register:
1677         igb_release_hw_control(adapter);
1678 err_eeprom:
1679         if (!igb_check_reset_block(hw))
1680                 igb_reset_phy(hw);
1681
1682         if (hw->flash_address)
1683                 iounmap(hw->flash_address);
1684 err_sw_init:
1685         igb_clear_interrupt_scheme(adapter);
1686         iounmap(hw->hw_addr);
1687 err_ioremap:
1688         free_netdev(netdev);
1689 err_alloc_etherdev:
1690         pci_release_selected_regions(pdev,
1691                                      pci_select_bars(pdev, IORESOURCE_MEM));
1692 err_pci_reg:
1693 err_dma:
1694         pci_disable_device(pdev);
1695         return err;
1696 }
1697
1698 /**
1699  * igb_remove - Device Removal Routine
1700  * @pdev: PCI device information struct
1701  *
1702  * igb_remove is called by the PCI subsystem to alert the driver
1703  * that it should release a PCI device.  The could be caused by a
1704  * Hot-Plug event, or because the driver is going to be removed from
1705  * memory.
1706  **/
1707 static void __devexit igb_remove(struct pci_dev *pdev)
1708 {
1709         struct net_device *netdev = pci_get_drvdata(pdev);
1710         struct igb_adapter *adapter = netdev_priv(netdev);
1711         struct e1000_hw *hw = &adapter->hw;
1712
1713         /* flush_scheduled work may reschedule our watchdog task, so
1714          * explicitly disable watchdog tasks from being rescheduled  */
1715         set_bit(__IGB_DOWN, &adapter->state);
1716         del_timer_sync(&adapter->watchdog_timer);
1717         del_timer_sync(&adapter->phy_info_timer);
1718
1719         flush_scheduled_work();
1720
1721 #ifdef CONFIG_IGB_DCA
1722         if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
1723                 dev_info(&pdev->dev, "DCA disabled\n");
1724                 dca_remove_requester(&pdev->dev);
1725                 adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
1726                 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE);
1727         }
1728 #endif
1729
1730         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
1731          * would have already happened in close and is redundant. */
1732         igb_release_hw_control(adapter);
1733
1734         unregister_netdev(netdev);
1735
1736         igb_clear_interrupt_scheme(adapter);
1737
1738 #ifdef CONFIG_PCI_IOV
1739         /* reclaim resources allocated to VFs */
1740         if (adapter->vf_data) {
1741                 /* disable iov and allow time for transactions to clear */
1742                 pci_disable_sriov(pdev);
1743                 msleep(500);
1744
1745                 kfree(adapter->vf_data);
1746                 adapter->vf_data = NULL;
1747                 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ);
1748                 msleep(100);
1749                 dev_info(&pdev->dev, "IOV Disabled\n");
1750         }
1751 #endif
1752
1753         iounmap(hw->hw_addr);
1754         if (hw->flash_address)
1755                 iounmap(hw->flash_address);
1756         pci_release_selected_regions(pdev,
1757                                      pci_select_bars(pdev, IORESOURCE_MEM));
1758
1759         free_netdev(netdev);
1760
1761         pci_disable_pcie_error_reporting(pdev);
1762
1763         pci_disable_device(pdev);
1764 }
1765
1766 /**
1767  * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space
1768  * @adapter: board private structure to initialize
1769  *
1770  * This function initializes the vf specific data storage and then attempts to
1771  * allocate the VFs.  The reason for ordering it this way is because it is much
1772  * mor expensive time wise to disable SR-IOV than it is to allocate and free
1773  * the memory for the VFs.
1774  **/
1775 static void __devinit igb_probe_vfs(struct igb_adapter * adapter)
1776 {
1777 #ifdef CONFIG_PCI_IOV
1778         struct pci_dev *pdev = adapter->pdev;
1779
1780         if (adapter->vfs_allocated_count > 7)
1781                 adapter->vfs_allocated_count = 7;
1782
1783         if (adapter->vfs_allocated_count) {
1784                 adapter->vf_data = kcalloc(adapter->vfs_allocated_count,
1785                                            sizeof(struct vf_data_storage),
1786                                            GFP_KERNEL);
1787                 /* if allocation failed then we do not support SR-IOV */
1788                 if (!adapter->vf_data) {
1789                         adapter->vfs_allocated_count = 0;
1790                         dev_err(&pdev->dev, "Unable to allocate memory for VF "
1791                                 "Data Storage\n");
1792                 }
1793         }
1794
1795         if (pci_enable_sriov(pdev, adapter->vfs_allocated_count)) {
1796                 kfree(adapter->vf_data);
1797                 adapter->vf_data = NULL;
1798 #endif /* CONFIG_PCI_IOV */
1799                 adapter->vfs_allocated_count = 0;
1800 #ifdef CONFIG_PCI_IOV
1801         } else {
1802                 unsigned char mac_addr[ETH_ALEN];
1803                 int i;
1804                 dev_info(&pdev->dev, "%d vfs allocated\n",
1805                          adapter->vfs_allocated_count);
1806                 for (i = 0; i < adapter->vfs_allocated_count; i++) {
1807                         random_ether_addr(mac_addr);
1808                         igb_set_vf_mac(adapter, i, mac_addr);
1809                 }
1810         }
1811 #endif /* CONFIG_PCI_IOV */
1812 }
1813
1814
1815 /**
1816  * igb_init_hw_timer - Initialize hardware timer used with IEEE 1588 timestamp
1817  * @adapter: board private structure to initialize
1818  *
1819  * igb_init_hw_timer initializes the function pointer and values for the hw
1820  * timer found in hardware.
1821  **/
1822 static void igb_init_hw_timer(struct igb_adapter *adapter)
1823 {
1824         struct e1000_hw *hw = &adapter->hw;
1825
1826         switch (hw->mac.type) {
1827         case e1000_82580:
1828                 memset(&adapter->cycles, 0, sizeof(adapter->cycles));
1829                 adapter->cycles.read = igb_read_clock;
1830                 adapter->cycles.mask = CLOCKSOURCE_MASK(64);
1831                 adapter->cycles.mult = 1;
1832                 /*
1833                  * The 82580 timesync updates the system timer every 8ns by 8ns
1834                  * and the value cannot be shifted.  Instead we need to shift
1835                  * the registers to generate a 64bit timer value.  As a result
1836                  * SYSTIMR/L/H, TXSTMPL/H, RXSTMPL/H all have to be shifted by
1837                  * 24 in order to generate a larger value for synchronization.
1838                  */
1839                 adapter->cycles.shift = IGB_82580_TSYNC_SHIFT;
1840                 /* disable system timer temporarily by setting bit 31 */
1841                 wr32(E1000_TSAUXC, 0x80000000);
1842                 wrfl();
1843
1844                 /* Set registers so that rollover occurs soon to test this. */
1845                 wr32(E1000_SYSTIMR, 0x00000000);
1846                 wr32(E1000_SYSTIML, 0x80000000);
1847                 wr32(E1000_SYSTIMH, 0x000000FF);
1848                 wrfl();
1849
1850                 /* enable system timer by clearing bit 31 */
1851                 wr32(E1000_TSAUXC, 0x0);
1852                 wrfl();
1853
1854                 timecounter_init(&adapter->clock,
1855                                  &adapter->cycles,
1856                                  ktime_to_ns(ktime_get_real()));
1857                 /*
1858                  * Synchronize our NIC clock against system wall clock. NIC
1859                  * time stamp reading requires ~3us per sample, each sample
1860                  * was pretty stable even under load => only require 10
1861                  * samples for each offset comparison.
1862                  */
1863                 memset(&adapter->compare, 0, sizeof(adapter->compare));
1864                 adapter->compare.source = &adapter->clock;
1865                 adapter->compare.target = ktime_get_real;
1866                 adapter->compare.num_samples = 10;
1867                 timecompare_update(&adapter->compare, 0);
1868                 break;
1869         case e1000_82576:
1870                 /*
1871                  * Initialize hardware timer: we keep it running just in case
1872                  * that some program needs it later on.
1873                  */
1874                 memset(&adapter->cycles, 0, sizeof(adapter->cycles));
1875                 adapter->cycles.read = igb_read_clock;
1876                 adapter->cycles.mask = CLOCKSOURCE_MASK(64);
1877                 adapter->cycles.mult = 1;
1878                 /**
1879                  * Scale the NIC clock cycle by a large factor so that
1880                  * relatively small clock corrections can be added or
1881                  * substracted at each clock tick. The drawbacks of a large
1882                  * factor are a) that the clock register overflows more quickly
1883                  * (not such a big deal) and b) that the increment per tick has
1884                  * to fit into 24 bits.  As a result we need to use a shift of
1885                  * 19 so we can fit a value of 16 into the TIMINCA register.
1886                  */
1887                 adapter->cycles.shift = IGB_82576_TSYNC_SHIFT;
1888                 wr32(E1000_TIMINCA,
1889                                 (1 << E1000_TIMINCA_16NS_SHIFT) |
1890                                 (16 << IGB_82576_TSYNC_SHIFT));
1891
1892                 /* Set registers so that rollover occurs soon to test this. */
1893                 wr32(E1000_SYSTIML, 0x00000000);
1894                 wr32(E1000_SYSTIMH, 0xFF800000);
1895                 wrfl();
1896
1897                 timecounter_init(&adapter->clock,
1898                                  &adapter->cycles,
1899                                  ktime_to_ns(ktime_get_real()));
1900                 /*
1901                  * Synchronize our NIC clock against system wall clock. NIC
1902                  * time stamp reading requires ~3us per sample, each sample
1903                  * was pretty stable even under load => only require 10
1904                  * samples for each offset comparison.
1905                  */
1906                 memset(&adapter->compare, 0, sizeof(adapter->compare));
1907                 adapter->compare.source = &adapter->clock;
1908                 adapter->compare.target = ktime_get_real;
1909                 adapter->compare.num_samples = 10;
1910                 timecompare_update(&adapter->compare, 0);
1911                 break;
1912         case e1000_82575:
1913                 /* 82575 does not support timesync */
1914         default:
1915                 break;
1916         }
1917
1918 }
1919
1920 /**
1921  * igb_sw_init - Initialize general software structures (struct igb_adapter)
1922  * @adapter: board private structure to initialize
1923  *
1924  * igb_sw_init initializes the Adapter private data structure.
1925  * Fields are initialized based on PCI device information and
1926  * OS network device settings (MTU size).
1927  **/
1928 static int __devinit igb_sw_init(struct igb_adapter *adapter)
1929 {
1930         struct e1000_hw *hw = &adapter->hw;
1931         struct net_device *netdev = adapter->netdev;
1932         struct pci_dev *pdev = adapter->pdev;
1933
1934         pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
1935
1936         adapter->tx_ring_count = IGB_DEFAULT_TXD;
1937         adapter->rx_ring_count = IGB_DEFAULT_RXD;
1938         adapter->rx_itr_setting = IGB_DEFAULT_ITR;
1939         adapter->tx_itr_setting = IGB_DEFAULT_ITR;
1940
1941         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1942         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1943
1944 #ifdef CONFIG_PCI_IOV
1945         if (hw->mac.type == e1000_82576)
1946                 adapter->vfs_allocated_count = max_vfs;
1947
1948 #endif /* CONFIG_PCI_IOV */
1949         adapter->rss_queues = min_t(u32, IGB_MAX_RX_QUEUES, num_online_cpus());
1950
1951         /*
1952          * if rss_queues > 4 or vfs are going to be allocated with rss_queues
1953          * then we should combine the queues into a queue pair in order to
1954          * conserve interrupts due to limited supply
1955          */
1956         if ((adapter->rss_queues > 4) ||
1957             ((adapter->rss_queues > 1) && (adapter->vfs_allocated_count > 6)))
1958                 adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
1959
1960         /* This call may decrease the number of queues */
1961         if (igb_init_interrupt_scheme(adapter)) {
1962                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1963                 return -ENOMEM;
1964         }
1965
1966         igb_init_hw_timer(adapter);
1967         igb_probe_vfs(adapter);
1968
1969         /* Explicitly disable IRQ since the NIC can be in any state. */
1970         igb_irq_disable(adapter);
1971
1972         set_bit(__IGB_DOWN, &adapter->state);
1973         return 0;
1974 }
1975
1976 /**
1977  * igb_open - Called when a network interface is made active
1978  * @netdev: network interface device structure
1979  *
1980  * Returns 0 on success, negative value on failure
1981  *
1982  * The open entry point is called when a network interface is made
1983  * active by the system (IFF_UP).  At this point all resources needed
1984  * for transmit and receive operations are allocated, the interrupt
1985  * handler is registered with the OS, the watchdog timer is started,
1986  * and the stack is notified that the interface is ready.
1987  **/
1988 static int igb_open(struct net_device *netdev)
1989 {
1990         struct igb_adapter *adapter = netdev_priv(netdev);
1991         struct e1000_hw *hw = &adapter->hw;
1992         int err;
1993         int i;
1994
1995         /* disallow open during test */
1996         if (test_bit(__IGB_TESTING, &adapter->state))
1997                 return -EBUSY;
1998
1999         netif_carrier_off(netdev);
2000
2001         /* allocate transmit descriptors */
2002         err = igb_setup_all_tx_resources(adapter);
2003         if (err)
2004                 goto err_setup_tx;
2005
2006         /* allocate receive descriptors */
2007         err = igb_setup_all_rx_resources(adapter);
2008         if (err)
2009                 goto err_setup_rx;
2010
2011         igb_power_up_link(adapter);
2012
2013         /* before we allocate an interrupt, we must be ready to handle it.
2014          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
2015          * as soon as we call pci_request_irq, so we have to setup our
2016          * clean_rx handler before we do so.  */
2017         igb_configure(adapter);
2018
2019         err = igb_request_irq(adapter);
2020         if (err)
2021                 goto err_req_irq;
2022
2023         /* From here on the code is the same as igb_up() */
2024         clear_bit(__IGB_DOWN, &adapter->state);
2025
2026         for (i = 0; i < adapter->num_q_vectors; i++) {
2027                 struct igb_q_vector *q_vector = adapter->q_vector[i];
2028                 napi_enable(&q_vector->napi);
2029         }
2030
2031         /* Clear any pending interrupts. */
2032         rd32(E1000_ICR);
2033
2034         igb_irq_enable(adapter);
2035
2036         /* notify VFs that reset has been completed */
2037         if (adapter->vfs_allocated_count) {
2038                 u32 reg_data = rd32(E1000_CTRL_EXT);
2039                 reg_data |= E1000_CTRL_EXT_PFRSTD;
2040                 wr32(E1000_CTRL_EXT, reg_data);
2041         }
2042
2043         netif_tx_start_all_queues(netdev);
2044
2045         /* start the watchdog. */
2046         hw->mac.get_link_status = 1;
2047         schedule_work(&adapter->watchdog_task);
2048
2049         return 0;
2050
2051 err_req_irq:
2052         igb_release_hw_control(adapter);
2053         igb_power_down_link(adapter);
2054         igb_free_all_rx_resources(adapter);
2055 err_setup_rx:
2056         igb_free_all_tx_resources(adapter);
2057 err_setup_tx:
2058         igb_reset(adapter);
2059
2060         return err;
2061 }
2062
2063 /**
2064  * igb_close - Disables a network interface
2065  * @netdev: network interface device structure
2066  *
2067  * Returns 0, this is not allowed to fail
2068  *
2069  * The close entry point is called when an interface is de-activated
2070  * by the OS.  The hardware is still under the driver's control, but
2071  * needs to be disabled.  A global MAC reset is issued to stop the
2072  * hardware, and all transmit and receive resources are freed.
2073  **/
2074 static int igb_close(struct net_device *netdev)
2075 {
2076         struct igb_adapter *adapter = netdev_priv(netdev);
2077
2078         WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
2079         igb_down(adapter);
2080
2081         igb_free_irq(adapter);
2082
2083         igb_free_all_tx_resources(adapter);
2084         igb_free_all_rx_resources(adapter);
2085
2086         return 0;
2087 }
2088
2089 /**
2090  * igb_setup_tx_resources - allocate Tx resources (Descriptors)
2091  * @tx_ring: tx descriptor ring (for a specific queue) to setup
2092  *
2093  * Return 0 on success, negative on failure
2094  **/
2095 int igb_setup_tx_resources(struct igb_ring *tx_ring)
2096 {
2097         struct pci_dev *pdev = tx_ring->pdev;
2098         int size;
2099
2100         size = sizeof(struct igb_buffer) * tx_ring->count;
2101         tx_ring->buffer_info = vmalloc(size);
2102         if (!tx_ring->buffer_info)
2103                 goto err;
2104         memset(tx_ring->buffer_info, 0, size);
2105
2106         /* round up to nearest 4K */
2107         tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
2108         tx_ring->size = ALIGN(tx_ring->size, 4096);
2109
2110         tx_ring->desc = pci_alloc_consistent(pdev,
2111                                              tx_ring->size,
2112                                              &tx_ring->dma);
2113
2114         if (!tx_ring->desc)
2115                 goto err;
2116
2117         tx_ring->next_to_use = 0;
2118         tx_ring->next_to_clean = 0;
2119         return 0;
2120
2121 err:
2122         vfree(tx_ring->buffer_info);
2123         dev_err(&pdev->dev,
2124                 "Unable to allocate memory for the transmit descriptor ring\n");
2125         return -ENOMEM;
2126 }
2127
2128 /**
2129  * igb_setup_all_tx_resources - wrapper to allocate Tx resources
2130  *                                (Descriptors) for all queues
2131  * @adapter: board private structure
2132  *
2133  * Return 0 on success, negative on failure
2134  **/
2135 static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
2136 {
2137         struct pci_dev *pdev = adapter->pdev;
2138         int i, err = 0;
2139
2140         for (i = 0; i < adapter->num_tx_queues; i++) {
2141                 err = igb_setup_tx_resources(adapter->tx_ring[i]);
2142                 if (err) {
2143                         dev_err(&pdev->dev,
2144                                 "Allocation for Tx Queue %u failed\n", i);
2145                         for (i--; i >= 0; i--)
2146                                 igb_free_tx_resources(adapter->tx_ring[i]);
2147                         break;
2148                 }
2149         }
2150
2151         for (i = 0; i < IGB_ABS_MAX_TX_QUEUES; i++) {
2152                 int r_idx = i % adapter->num_tx_queues;
2153                 adapter->multi_tx_table[i] = adapter->tx_ring[r_idx];
2154         }
2155         return err;
2156 }
2157
2158 /**
2159  * igb_setup_tctl - configure the transmit control registers
2160  * @adapter: Board private structure
2161  **/
2162 void igb_setup_tctl(struct igb_adapter *adapter)
2163 {
2164         struct e1000_hw *hw = &adapter->hw;
2165         u32 tctl;
2166
2167         /* disable queue 0 which is enabled by default on 82575 and 82576 */
2168         wr32(E1000_TXDCTL(0), 0);
2169
2170         /* Program the Transmit Control Register */
2171         tctl = rd32(E1000_TCTL);
2172         tctl &= ~E1000_TCTL_CT;
2173         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2174                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2175
2176         igb_config_collision_dist(hw);
2177
2178         /* Enable transmits */
2179         tctl |= E1000_TCTL_EN;
2180
2181         wr32(E1000_TCTL, tctl);
2182 }
2183
2184 /**
2185  * igb_configure_tx_ring - Configure transmit ring after Reset
2186  * @adapter: board private structure
2187  * @ring: tx ring to configure
2188  *
2189  * Configure a transmit ring after a reset.
2190  **/
2191 void igb_configure_tx_ring(struct igb_adapter *adapter,
2192                            struct igb_ring *ring)
2193 {
2194         struct e1000_hw *hw = &adapter->hw;
2195         u32 txdctl;
2196         u64 tdba = ring->dma;
2197         int reg_idx = ring->reg_idx;
2198
2199         /* disable the queue */
2200         txdctl = rd32(E1000_TXDCTL(reg_idx));
2201         wr32(E1000_TXDCTL(reg_idx),
2202                         txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
2203         wrfl();
2204         mdelay(10);
2205
2206         wr32(E1000_TDLEN(reg_idx),
2207                         ring->count * sizeof(union e1000_adv_tx_desc));
2208         wr32(E1000_TDBAL(reg_idx),
2209                         tdba & 0x00000000ffffffffULL);
2210         wr32(E1000_TDBAH(reg_idx), tdba >> 32);
2211
2212         ring->head = hw->hw_addr + E1000_TDH(reg_idx);
2213         ring->tail = hw->hw_addr + E1000_TDT(reg_idx);
2214         writel(0, ring->head);
2215         writel(0, ring->tail);
2216
2217         txdctl |= IGB_TX_PTHRESH;
2218         txdctl |= IGB_TX_HTHRESH << 8;
2219         txdctl |= IGB_TX_WTHRESH << 16;
2220
2221         txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2222         wr32(E1000_TXDCTL(reg_idx), txdctl);
2223 }
2224
2225 /**
2226  * igb_configure_tx - Configure transmit Unit after Reset
2227  * @adapter: board private structure
2228  *
2229  * Configure the Tx unit of the MAC after a reset.
2230  **/
2231 static void igb_configure_tx(struct igb_adapter *adapter)
2232 {
2233         int i;
2234
2235         for (i = 0; i < adapter->num_tx_queues; i++)
2236                 igb_configure_tx_ring(adapter, adapter->tx_ring[i]);
2237 }
2238
2239 /**
2240  * igb_setup_rx_resources - allocate Rx resources (Descriptors)
2241  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2242  *
2243  * Returns 0 on success, negative on failure
2244  **/
2245 int igb_setup_rx_resources(struct igb_ring *rx_ring)
2246 {
2247         struct pci_dev *pdev = rx_ring->pdev;
2248         int size, desc_len;
2249
2250         size = sizeof(struct igb_buffer) * rx_ring->count;
2251         rx_ring->buffer_info = vmalloc(size);
2252         if (!rx_ring->buffer_info)
2253                 goto err;
2254         memset(rx_ring->buffer_info, 0, size);
2255
2256         desc_len = sizeof(union e1000_adv_rx_desc);
2257
2258         /* Round up to nearest 4K */
2259         rx_ring->size = rx_ring->count * desc_len;
2260         rx_ring->size = ALIGN(rx_ring->size, 4096);
2261
2262         rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
2263                                              &rx_ring->dma);
2264
2265         if (!rx_ring->desc)
2266                 goto err;
2267
2268         rx_ring->next_to_clean = 0;
2269         rx_ring->next_to_use = 0;
2270
2271         return 0;
2272
2273 err:
2274         vfree(rx_ring->buffer_info);
2275         rx_ring->buffer_info = NULL;
2276         dev_err(&pdev->dev, "Unable to allocate memory for "
2277                 "the receive descriptor ring\n");
2278         return -ENOMEM;
2279 }
2280
2281 /**
2282  * igb_setup_all_rx_resources - wrapper to allocate Rx resources
2283  *                                (Descriptors) for all queues
2284  * @adapter: board private structure
2285  *
2286  * Return 0 on success, negative on failure
2287  **/
2288 static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
2289 {
2290         struct pci_dev *pdev = adapter->pdev;
2291         int i, err = 0;
2292
2293         for (i = 0; i < adapter->num_rx_queues; i++) {
2294                 err = igb_setup_rx_resources(adapter->rx_ring[i]);
2295                 if (err) {
2296                         dev_err(&pdev->dev,
2297                                 "Allocation for Rx Queue %u failed\n", i);
2298                         for (i--; i >= 0; i--)
2299                                 igb_free_rx_resources(adapter->rx_ring[i]);
2300                         break;
2301                 }
2302         }
2303
2304         return err;
2305 }
2306
2307 /**
2308  * igb_setup_mrqc - configure the multiple receive queue control registers
2309  * @adapter: Board private structure
2310  **/
2311 static void igb_setup_mrqc(struct igb_adapter *adapter)
2312 {
2313         struct e1000_hw *hw = &adapter->hw;
2314         u32 mrqc, rxcsum;
2315         u32 j, num_rx_queues, shift = 0, shift2 = 0;
2316         union e1000_reta {
2317                 u32 dword;
2318                 u8  bytes[4];
2319         } reta;
2320         static const u8 rsshash[40] = {
2321                 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, 0x41, 0x67,
2322                 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, 0xd0, 0xca, 0x2b, 0xcb,
2323                 0xae, 0x7b, 0x30, 0xb4, 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30,
2324                 0xf2, 0x0c, 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa };
2325
2326         /* Fill out hash function seeds */
2327         for (j = 0; j < 10; j++) {
2328                 u32 rsskey = rsshash[(j * 4)];
2329                 rsskey |= rsshash[(j * 4) + 1] << 8;
2330                 rsskey |= rsshash[(j * 4) + 2] << 16;
2331                 rsskey |= rsshash[(j * 4) + 3] << 24;
2332                 array_wr32(E1000_RSSRK(0), j, rsskey);
2333         }
2334
2335         num_rx_queues = adapter->rss_queues;
2336
2337         if (adapter->vfs_allocated_count) {
2338                 /* 82575 and 82576 supports 2 RSS queues for VMDq */
2339                 switch (hw->mac.type) {
2340                 case e1000_82580:
2341                         num_rx_queues = 1;
2342                         shift = 0;
2343                         break;
2344                 case e1000_82576:
2345                         shift = 3;
2346                         num_rx_queues = 2;
2347                         break;
2348                 case e1000_82575:
2349                         shift = 2;
2350                         shift2 = 6;
2351                 default:
2352                         break;
2353                 }
2354         } else {
2355                 if (hw->mac.type == e1000_82575)
2356                         shift = 6;
2357         }
2358
2359         for (j = 0; j < (32 * 4); j++) {
2360                 reta.bytes[j & 3] = (j % num_rx_queues) << shift;
2361                 if (shift2)
2362                         reta.bytes[j & 3] |= num_rx_queues << shift2;
2363                 if ((j & 3) == 3)
2364                         wr32(E1000_RETA(j >> 2), reta.dword);
2365         }
2366
2367         /*
2368          * Disable raw packet checksumming so that RSS hash is placed in
2369          * descriptor on writeback.  No need to enable TCP/UDP/IP checksum
2370          * offloads as they are enabled by default
2371          */
2372         rxcsum = rd32(E1000_RXCSUM);
2373         rxcsum |= E1000_RXCSUM_PCSD;
2374
2375         if (adapter->hw.mac.type >= e1000_82576)
2376                 /* Enable Receive Checksum Offload for SCTP */
2377                 rxcsum |= E1000_RXCSUM_CRCOFL;
2378
2379         /* Don't need to set TUOFL or IPOFL, they default to 1 */
2380         wr32(E1000_RXCSUM, rxcsum);
2381
2382         /* If VMDq is enabled then we set the appropriate mode for that, else
2383          * we default to RSS so that an RSS hash is calculated per packet even
2384          * if we are only using one queue */
2385         if (adapter->vfs_allocated_count) {
2386                 if (hw->mac.type > e1000_82575) {
2387                         /* Set the default pool for the PF's first queue */
2388                         u32 vtctl = rd32(E1000_VT_CTL);
2389                         vtctl &= ~(E1000_VT_CTL_DEFAULT_POOL_MASK |
2390                                    E1000_VT_CTL_DISABLE_DEF_POOL);
2391                         vtctl |= adapter->vfs_allocated_count <<
2392                                 E1000_VT_CTL_DEFAULT_POOL_SHIFT;
2393                         wr32(E1000_VT_CTL, vtctl);
2394                 }
2395                 if (adapter->rss_queues > 1)
2396                         mrqc = E1000_MRQC_ENABLE_VMDQ_RSS_2Q;
2397                 else
2398                         mrqc = E1000_MRQC_ENABLE_VMDQ;
2399         } else {
2400                 mrqc = E1000_MRQC_ENABLE_RSS_4Q;
2401         }
2402         igb_vmm_control(adapter);
2403
2404         mrqc |= (E1000_MRQC_RSS_FIELD_IPV4 |
2405                  E1000_MRQC_RSS_FIELD_IPV4_TCP);
2406         mrqc |= (E1000_MRQC_RSS_FIELD_IPV6 |
2407                  E1000_MRQC_RSS_FIELD_IPV6_TCP);
2408         mrqc |= (E1000_MRQC_RSS_FIELD_IPV4_UDP |
2409                  E1000_MRQC_RSS_FIELD_IPV6_UDP);
2410         mrqc |= (E1000_MRQC_RSS_FIELD_IPV6_UDP_EX |
2411                  E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
2412
2413         wr32(E1000_MRQC, mrqc);
2414 }
2415
2416 /**
2417  * igb_setup_rctl - configure the receive control registers
2418  * @adapter: Board private structure
2419  **/
2420 void igb_setup_rctl(struct igb_adapter *adapter)
2421 {
2422         struct e1000_hw *hw = &adapter->hw;
2423         u32 rctl;
2424
2425         rctl = rd32(E1000_RCTL);
2426
2427         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2428         rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
2429
2430         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF |
2431                 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2432
2433         /*
2434          * enable stripping of CRC. It's unlikely this will break BMC
2435          * redirection as it did with e1000. Newer features require
2436          * that the HW strips the CRC.
2437          */
2438         rctl |= E1000_RCTL_SECRC;
2439
2440         /* disable store bad packets and clear size bits. */
2441         rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256);
2442
2443         /* enable LPE to prevent packets larger than max_frame_size */
2444         rctl |= E1000_RCTL_LPE;
2445
2446         /* disable queue 0 to prevent tail write w/o re-config */
2447         wr32(E1000_RXDCTL(0), 0);
2448
2449         /* Attention!!!  For SR-IOV PF driver operations you must enable
2450          * queue drop for all VF and PF queues to prevent head of line blocking
2451          * if an un-trusted VF does not provide descriptors to hardware.
2452          */
2453         if (adapter->vfs_allocated_count) {
2454                 /* set all queue drop enable bits */
2455                 wr32(E1000_QDE, ALL_QUEUES);
2456         }
2457
2458         wr32(E1000_RCTL, rctl);
2459 }
2460
2461 static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
2462                                    int vfn)
2463 {
2464         struct e1000_hw *hw = &adapter->hw;
2465         u32 vmolr;
2466
2467         /* if it isn't the PF check to see if VFs are enabled and
2468          * increase the size to support vlan tags */
2469         if (vfn < adapter->vfs_allocated_count &&
2470             adapter->vf_data[vfn].vlans_enabled)
2471                 size += VLAN_TAG_SIZE;
2472
2473         vmolr = rd32(E1000_VMOLR(vfn));
2474         vmolr &= ~E1000_VMOLR_RLPML_MASK;
2475         vmolr |= size | E1000_VMOLR_LPE;
2476         wr32(E1000_VMOLR(vfn), vmolr);
2477
2478         return 0;
2479 }
2480
2481 /**
2482  * igb_rlpml_set - set maximum receive packet size
2483  * @adapter: board private structure
2484  *
2485  * Configure maximum receivable packet size.
2486  **/
2487 static void igb_rlpml_set(struct igb_adapter *adapter)
2488 {
2489         u32 max_frame_size = adapter->max_frame_size;
2490         struct e1000_hw *hw = &adapter->hw;
2491         u16 pf_id = adapter->vfs_allocated_count;
2492
2493         if (adapter->vlgrp)
2494                 max_frame_size += VLAN_TAG_SIZE;
2495
2496         /* if vfs are enabled we set RLPML to the largest possible request
2497          * size and set the VMOLR RLPML to the size we need */
2498         if (pf_id) {
2499                 igb_set_vf_rlpml(adapter, max_frame_size, pf_id);
2500                 max_frame_size = MAX_JUMBO_FRAME_SIZE;
2501         }
2502
2503         wr32(E1000_RLPML, max_frame_size);
2504 }
2505
2506 static inline void igb_set_vmolr(struct igb_adapter *adapter,
2507                                  int vfn, bool aupe)
2508 {
2509         struct e1000_hw *hw = &adapter->hw;
2510         u32 vmolr;
2511
2512         /*
2513          * This register exists only on 82576 and newer so if we are older then
2514          * we should exit and do nothing
2515          */
2516         if (hw->mac.type < e1000_82576)
2517                 return;
2518
2519         vmolr = rd32(E1000_VMOLR(vfn));
2520         vmolr |= E1000_VMOLR_STRVLAN;      /* Strip vlan tags */
2521         if (aupe)
2522                 vmolr |= E1000_VMOLR_AUPE;        /* Accept untagged packets */
2523         else
2524                 vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */
2525
2526         /* clear all bits that might not be set */
2527         vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE);
2528
2529         if (adapter->rss_queues > 1 && vfn == adapter->vfs_allocated_count)
2530                 vmolr |= E1000_VMOLR_RSSE; /* enable RSS */
2531         /*
2532          * for VMDq only allow the VFs and pool 0 to accept broadcast and
2533          * multicast packets
2534          */
2535         if (vfn <= adapter->vfs_allocated_count)
2536                 vmolr |= E1000_VMOLR_BAM;          /* Accept broadcast */
2537
2538         wr32(E1000_VMOLR(vfn), vmolr);
2539 }
2540
2541 /**
2542  * igb_configure_rx_ring - Configure a receive ring after Reset
2543  * @adapter: board private structure
2544  * @ring: receive ring to be configured
2545  *
2546  * Configure the Rx unit of the MAC after a reset.
2547  **/
2548 void igb_configure_rx_ring(struct igb_adapter *adapter,
2549                            struct igb_ring *ring)
2550 {
2551         struct e1000_hw *hw = &adapter->hw;
2552         u64 rdba = ring->dma;
2553         int reg_idx = ring->reg_idx;
2554         u32 srrctl, rxdctl;
2555
2556         /* disable the queue */
2557         rxdctl = rd32(E1000_RXDCTL(reg_idx));
2558         wr32(E1000_RXDCTL(reg_idx),
2559                         rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
2560
2561         /* Set DMA base address registers */
2562         wr32(E1000_RDBAL(reg_idx),
2563              rdba & 0x00000000ffffffffULL);
2564         wr32(E1000_RDBAH(reg_idx), rdba >> 32);
2565         wr32(E1000_RDLEN(reg_idx),
2566                        ring->count * sizeof(union e1000_adv_rx_desc));
2567
2568         /* initialize head and tail */
2569         ring->head = hw->hw_addr + E1000_RDH(reg_idx);
2570         ring->tail = hw->hw_addr + E1000_RDT(reg_idx);
2571         writel(0, ring->head);
2572         writel(0, ring->tail);
2573
2574         /* set descriptor configuration */
2575         if (ring->rx_buffer_len < IGB_RXBUFFER_1024) {
2576                 srrctl = ALIGN(ring->rx_buffer_len, 64) <<
2577                          E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
2578 #if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
2579                 srrctl |= IGB_RXBUFFER_16384 >>
2580                           E1000_SRRCTL_BSIZEPKT_SHIFT;
2581 #else
2582                 srrctl |= (PAGE_SIZE / 2) >>
2583                           E1000_SRRCTL_BSIZEPKT_SHIFT;
2584 #endif
2585                 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2586         } else {
2587                 srrctl = ALIGN(ring->rx_buffer_len, 1024) >>
2588                          E1000_SRRCTL_BSIZEPKT_SHIFT;
2589                 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
2590         }
2591         /* Only set Drop Enable if we are supporting multiple queues */
2592         if (adapter->vfs_allocated_count || adapter->num_rx_queues > 1)
2593                 srrctl |= E1000_SRRCTL_DROP_EN;
2594
2595         wr32(E1000_SRRCTL(reg_idx), srrctl);
2596
2597         /* set filtering for VMDQ pools */
2598         igb_set_vmolr(adapter, reg_idx & 0x7, true);
2599
2600         /* enable receive descriptor fetching */
2601         rxdctl = rd32(E1000_RXDCTL(reg_idx));
2602         rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
2603         rxdctl &= 0xFFF00000;
2604         rxdctl |= IGB_RX_PTHRESH;
2605         rxdctl |= IGB_RX_HTHRESH << 8;
2606         rxdctl |= IGB_RX_WTHRESH << 16;
2607         wr32(E1000_RXDCTL(reg_idx), rxdctl);
2608 }
2609
2610 /**
2611  * igb_configure_rx - Configure receive Unit after Reset
2612  * @adapter: board private structure
2613  *
2614  * Configure the Rx unit of the MAC after a reset.
2615  **/
2616 static void igb_configure_rx(struct igb_adapter *adapter)
2617 {
2618         int i;
2619
2620         /* set UTA to appropriate mode */
2621         igb_set_uta(adapter);
2622
2623         /* set the correct pool for the PF default MAC address in entry 0 */
2624         igb_rar_set_qsel(adapter, adapter->hw.mac.addr, 0,
2625                          adapter->vfs_allocated_count);
2626
2627         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2628          * the Base and Length of the Rx Descriptor Ring */
2629         for (i = 0; i < adapter->num_rx_queues; i++)
2630                 igb_configure_rx_ring(adapter, adapter->rx_ring[i]);
2631 }
2632
2633 /**
2634  * igb_free_tx_resources - Free Tx Resources per Queue
2635  * @tx_ring: Tx descriptor ring for a specific queue
2636  *
2637  * Free all transmit software resources
2638  **/
2639 void igb_free_tx_resources(struct igb_ring *tx_ring)
2640 {
2641         igb_clean_tx_ring(tx_ring);
2642
2643         vfree(tx_ring->buffer_info);
2644         tx_ring->buffer_info = NULL;
2645
2646         /* if not set, then don't free */
2647         if (!tx_ring->desc)
2648                 return;
2649
2650         pci_free_consistent(tx_ring->pdev, tx_ring->size,
2651                             tx_ring->desc, tx_ring->dma);
2652
2653         tx_ring->desc = NULL;
2654 }
2655
2656 /**
2657  * igb_free_all_tx_resources - Free Tx Resources for All Queues
2658  * @adapter: board private structure
2659  *
2660  * Free all transmit software resources
2661  **/
2662 static void igb_free_all_tx_resources(struct igb_adapter *adapter)
2663 {
2664         int i;
2665
2666         for (i = 0; i < adapter->num_tx_queues; i++)
2667                 igb_free_tx_resources(adapter->tx_ring[i]);
2668 }
2669
2670 void igb_unmap_and_free_tx_resource(struct igb_ring *tx_ring,
2671                                     struct igb_buffer *buffer_info)
2672 {
2673         if (buffer_info->dma) {
2674                 if (buffer_info->mapped_as_page)
2675                         pci_unmap_page(tx_ring->pdev,
2676                                         buffer_info->dma,
2677                                         buffer_info->length,
2678                                         PCI_DMA_TODEVICE);
2679                 else
2680                         pci_unmap_single(tx_ring->pdev,
2681                                         buffer_info->dma,
2682                                         buffer_info->length,
2683                                         PCI_DMA_TODEVICE);
2684                 buffer_info->dma = 0;
2685         }
2686         if (buffer_info->skb) {
2687                 dev_kfree_skb_any(buffer_info->skb);
2688                 buffer_info->skb = NULL;
2689         }
2690         buffer_info->time_stamp = 0;
2691         buffer_info->length = 0;
2692         buffer_info->next_to_watch = 0;
2693         buffer_info->mapped_as_page = false;
2694 }
2695
2696 /**
2697  * igb_clean_tx_ring - Free Tx Buffers
2698  * @tx_ring: ring to be cleaned
2699  **/
2700 static void igb_clean_tx_ring(struct igb_ring *tx_ring)
2701 {
2702         struct igb_buffer *buffer_info;
2703         unsigned long size;
2704         unsigned int i;
2705
2706         if (!tx_ring->buffer_info)
2707                 return;
2708         /* Free all the Tx ring sk_buffs */
2709
2710         for (i = 0; i < tx_ring->count; i++) {
2711                 buffer_info = &tx_ring->buffer_info[i];
2712                 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
2713         }
2714
2715         size = sizeof(struct igb_buffer) * tx_ring->count;
2716         memset(tx_ring->buffer_info, 0, size);
2717
2718         /* Zero out the descriptor ring */
2719         memset(tx_ring->desc, 0, tx_ring->size);
2720
2721         tx_ring->next_to_use = 0;
2722         tx_ring->next_to_clean = 0;
2723 }
2724
2725 /**
2726  * igb_clean_all_tx_rings - Free Tx Buffers for all queues
2727  * @adapter: board private structure
2728  **/
2729 static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
2730 {
2731         int i;
2732
2733         for (i = 0; i < adapter->num_tx_queues; i++)
2734                 igb_clean_tx_ring(adapter->tx_ring[i]);
2735 }
2736
2737 /**
2738  * igb_free_rx_resources - Free Rx Resources
2739  * @rx_ring: ring to clean the resources from
2740  *
2741  * Free all receive software resources
2742  **/
2743 void igb_free_rx_resources(struct igb_ring *rx_ring)
2744 {
2745         igb_clean_rx_ring(rx_ring);
2746
2747         vfree(rx_ring->buffer_info);
2748         rx_ring->buffer_info = NULL;
2749
2750         /* if not set, then don't free */
2751         if (!rx_ring->desc)
2752                 return;
2753
2754         pci_free_consistent(rx_ring->pdev, rx_ring->size,
2755                             rx_ring->desc, rx_ring->dma);
2756
2757         rx_ring->desc = NULL;
2758 }
2759
2760 /**
2761  * igb_free_all_rx_resources - Free Rx Resources for All Queues
2762  * @adapter: board private structure
2763  *
2764  * Free all receive software resources
2765  **/
2766 static void igb_free_all_rx_resources(struct igb_adapter *adapter)
2767 {
2768         int i;
2769
2770         for (i = 0; i < adapter->num_rx_queues; i++)
2771                 igb_free_rx_resources(adapter->rx_ring[i]);
2772 }
2773
2774 /**
2775  * igb_clean_rx_ring - Free Rx Buffers per Queue
2776  * @rx_ring: ring to free buffers from
2777  **/
2778 static void igb_clean_rx_ring(struct igb_ring *rx_ring)
2779 {
2780         struct igb_buffer *buffer_info;
2781         unsigned long size;
2782         unsigned int i;
2783
2784         if (!rx_ring->buffer_info)
2785                 return;
2786
2787         /* Free all the Rx ring sk_buffs */
2788         for (i = 0; i < rx_ring->count; i++) {
2789                 buffer_info = &rx_ring->buffer_info[i];
2790                 if (buffer_info->dma) {
2791                         pci_unmap_single(rx_ring->pdev,
2792                                          buffer_info->dma,
2793                                          rx_ring->rx_buffer_len,
2794                                          PCI_DMA_FROMDEVICE);
2795                         buffer_info->dma = 0;
2796                 }
2797
2798                 if (buffer_info->skb) {
2799                         dev_kfree_skb(buffer_info->skb);
2800                         buffer_info->skb = NULL;
2801                 }
2802                 if (buffer_info->page_dma) {
2803                         pci_unmap_page(rx_ring->pdev,
2804                                        buffer_info->page_dma,
2805                                        PAGE_SIZE / 2,
2806                                        PCI_DMA_FROMDEVICE);
2807                         buffer_info->page_dma = 0;
2808                 }
2809                 if (buffer_info->page) {
2810                         put_page(buffer_info->page);
2811                         buffer_info->page = NULL;
2812                         buffer_info->page_offset = 0;
2813                 }
2814         }
2815
2816         size = sizeof(struct igb_buffer) * rx_ring->count;
2817         memset(rx_ring->buffer_info, 0, size);
2818
2819         /* Zero out the descriptor ring */
2820         memset(rx_ring->desc, 0, rx_ring->size);
2821
2822         rx_ring->next_to_clean = 0;
2823         rx_ring->next_to_use = 0;
2824 }
2825
2826 /**
2827  * igb_clean_all_rx_rings - Free Rx Buffers for all queues
2828  * @adapter: board private structure
2829  **/
2830 static void igb_clean_all_rx_rings(struct igb_adapter *adapter)
2831 {
2832         int i;
2833
2834         for (i = 0; i < adapter->num_rx_queues; i++)
2835                 igb_clean_rx_ring(adapter->rx_ring[i]);
2836 }
2837
2838 /**
2839  * igb_set_mac - Change the Ethernet Address of the NIC
2840  * @netdev: network interface device structure
2841  * @p: pointer to an address structure
2842  *
2843  * Returns 0 on success, negative on failure
2844  **/
2845 static int igb_set_mac(struct net_device *netdev, void *p)
2846 {
2847         struct igb_adapter *adapter = netdev_priv(netdev);
2848         struct e1000_hw *hw = &adapter->hw;
2849         struct sockaddr *addr = p;
2850
2851         if (!is_valid_ether_addr(addr->sa_data))
2852                 return -EADDRNOTAVAIL;
2853
2854         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2855         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
2856
2857         /* set the correct pool for the new PF MAC address in entry 0 */
2858         igb_rar_set_qsel(adapter, hw->mac.addr, 0,
2859                          adapter->vfs_allocated_count);
2860
2861         return 0;
2862 }
2863
2864 /**
2865  * igb_write_mc_addr_list - write multicast addresses to MTA
2866  * @netdev: network interface device structure
2867  *
2868  * Writes multicast address list to the MTA hash table.
2869  * Returns: -ENOMEM on failure
2870  *                0 on no addresses written
2871  *                X on writing X addresses to MTA
2872  **/
2873 static int igb_write_mc_addr_list(struct net_device *netdev)
2874 {
2875         struct igb_adapter *adapter = netdev_priv(netdev);
2876         struct e1000_hw *hw = &adapter->hw;
2877         struct dev_mc_list *mc_ptr;
2878         u8  *mta_list;
2879         int i;
2880
2881         if (netdev_mc_empty(netdev)) {
2882                 /* nothing to program, so clear mc list */
2883                 igb_update_mc_addr_list(hw, NULL, 0);
2884                 igb_restore_vf_multicasts(adapter);
2885                 return 0;
2886         }
2887
2888         mta_list = kzalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
2889         if (!mta_list)
2890                 return -ENOMEM;
2891
2892         /* The shared function expects a packed array of only addresses. */
2893         i = 0;
2894         netdev_for_each_mc_addr(mc_ptr, netdev)
2895                 memcpy(mta_list + (i++ * ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN);
2896
2897         igb_update_mc_addr_list(hw, mta_list, i);
2898         kfree(mta_list);
2899
2900         return netdev_mc_count(netdev);
2901 }
2902
2903 /**
2904  * igb_write_uc_addr_list - write unicast addresses to RAR table
2905  * @netdev: network interface device structure
2906  *
2907  * Writes unicast address list to the RAR table.
2908  * Returns: -ENOMEM on failure/insufficient address space
2909  *                0 on no addresses written
2910  *                X on writing X addresses to the RAR table
2911  **/
2912 static int igb_write_uc_addr_list(struct net_device *netdev)
2913 {
2914         struct igb_adapter *adapter = netdev_priv(netdev);
2915         struct e1000_hw *hw = &adapter->hw;
2916         unsigned int vfn = adapter->vfs_allocated_count;
2917         unsigned int rar_entries = hw->mac.rar_entry_count - (vfn + 1);
2918         int count = 0;
2919
2920         /* return ENOMEM indicating insufficient memory for addresses */
2921         if (netdev_uc_count(netdev) > rar_entries)
2922                 return -ENOMEM;
2923
2924         if (!netdev_uc_empty(netdev) && rar_entries) {
2925                 struct netdev_hw_addr *ha;
2926
2927                 netdev_for_each_uc_addr(ha, netdev) {
2928                         if (!rar_entries)
2929                                 break;
2930                         igb_rar_set_qsel(adapter, ha->addr,
2931                                          rar_entries--,
2932                                          vfn);
2933                         count++;
2934                 }
2935         }
2936         /* write the addresses in reverse order to avoid write combining */
2937         for (; rar_entries > 0 ; rar_entries--) {
2938                 wr32(E1000_RAH(rar_entries), 0);
2939                 wr32(E1000_RAL(rar_entries), 0);
2940         }
2941         wrfl();
2942
2943         return count;
2944 }
2945
2946 /**
2947  * igb_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2948  * @netdev: network interface device structure
2949  *
2950  * The set_rx_mode entry point is called whenever the unicast or multicast
2951  * address lists or the network interface flags are updated.  This routine is
2952  * responsible for configuring the hardware for proper unicast, multicast,
2953  * promiscuous mode, and all-multi behavior.
2954  **/
2955 static void igb_set_rx_mode(struct net_device *netdev)
2956 {
2957         struct igb_adapter *adapter = netdev_priv(netdev);
2958         struct e1000_hw *hw = &adapter->hw;
2959         unsigned int vfn = adapter->vfs_allocated_count;
2960         u32 rctl, vmolr = 0;
2961         int count;
2962
2963         /* Check for Promiscuous and All Multicast modes */
2964         rctl = rd32(E1000_RCTL);
2965
2966         /* clear the effected bits */
2967         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_VFE);
2968
2969         if (netdev->flags & IFF_PROMISC) {
2970                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2971                 vmolr |= (E1000_VMOLR_ROPE | E1000_VMOLR_MPME);
2972         } else {
2973                 if (netdev->flags & IFF_ALLMULTI) {
2974                         rctl |= E1000_RCTL_MPE;
2975                         vmolr |= E1000_VMOLR_MPME;
2976                 } else {
2977                         /*
2978                          * Write addresses to the MTA, if the attempt fails
2979                          * then we should just turn on promiscous mode so
2980                          * that we can at least receive multicast traffic
2981                          */
2982                         count = igb_write_mc_addr_list(netdev);
2983                         if (count < 0) {
2984                                 rctl |= E1000_RCTL_MPE;
2985                                 vmolr |= E1000_VMOLR_MPME;
2986                         } else if (count) {
2987                                 vmolr |= E1000_VMOLR_ROMPE;
2988                         }
2989                 }
2990                 /*
2991                  * Write addresses to available RAR registers, if there is not
2992                  * sufficient space to store all the addresses then enable
2993                  * unicast promiscous mode
2994                  */
2995                 count = igb_write_uc_addr_list(netdev);
2996                 if (count < 0) {
2997                         rctl |= E1000_RCTL_UPE;
2998                         vmolr |= E1000_VMOLR_ROPE;
2999                 }
3000                 rctl |= E1000_RCTL_VFE;
3001         }
3002         wr32(E1000_RCTL, rctl);
3003
3004         /*
3005          * In order to support SR-IOV and eventually VMDq it is necessary to set
3006          * the VMOLR to enable the appropriate modes.  Without this workaround
3007          * we will have issues with VLAN tag stripping not being done for frames
3008          * that are only arriving because we are the default pool
3009          */
3010         if (hw->mac.type < e1000_82576)
3011                 return;
3012
3013         vmolr |= rd32(E1000_VMOLR(vfn)) &
3014                  ~(E1000_VMOLR_ROPE | E1000_VMOLR_MPME | E1000_VMOLR_ROMPE);
3015         wr32(E1000_VMOLR(vfn), vmolr);
3016         igb_restore_vf_multicasts(adapter);
3017 }
3018
3019 /* Need to wait a few seconds after link up to get diagnostic information from
3020  * the phy */
3021 static void igb_update_phy_info(unsigned long data)
3022 {
3023         struct igb_adapter *adapter = (struct igb_adapter *) data;
3024         igb_get_phy_info(&adapter->hw);
3025 }
3026
3027 /**
3028  * igb_has_link - check shared code for link and determine up/down
3029  * @adapter: pointer to driver private info
3030  **/
3031 bool igb_has_link(struct igb_adapter *adapter)
3032 {
3033         struct e1000_hw *hw = &adapter->hw;
3034         bool link_active = false;
3035         s32 ret_val = 0;
3036
3037         /* get_link_status is set on LSC (link status) interrupt or
3038          * rx sequence error interrupt.  get_link_status will stay
3039          * false until the e1000_check_for_link establishes link
3040          * for copper adapters ONLY
3041          */
3042         switch (hw->phy.media_type) {
3043         case e1000_media_type_copper:
3044                 if (hw->mac.get_link_status) {
3045                         ret_val = hw->mac.ops.check_for_link(hw);
3046                         link_active = !hw->mac.get_link_status;
3047                 } else {
3048                         link_active = true;
3049                 }
3050                 break;
3051         case e1000_media_type_internal_serdes:
3052                 ret_val = hw->mac.ops.check_for_link(hw);
3053                 link_active = hw->mac.serdes_has_link;
3054                 break;
3055         default:
3056         case e1000_media_type_unknown:
3057                 break;
3058         }
3059
3060         return link_active;
3061 }
3062
3063 /**
3064  * igb_watchdog - Timer Call-back
3065  * @data: pointer to adapter cast into an unsigned long
3066  **/
3067 static void igb_watchdog(unsigned long data)
3068 {
3069         struct igb_adapter *adapter = (struct igb_adapter *)data;
3070         /* Do the rest outside of interrupt context */
3071         schedule_work(&adapter->watchdog_task);
3072 }
3073
3074 static void igb_watchdog_task(struct work_struct *work)
3075 {
3076         struct igb_adapter *adapter = container_of(work,
3077                                                    struct igb_adapter,
3078                                                    watchdog_task);
3079         struct e1000_hw *hw = &adapter->hw;
3080         struct net_device *netdev = adapter->netdev;
3081         u32 link;
3082         int i;
3083
3084         link = igb_has_link(adapter);
3085         if (link) {
3086                 if (!netif_carrier_ok(netdev)) {
3087                         u32 ctrl;
3088                         hw->mac.ops.get_speed_and_duplex(hw,
3089                                                          &adapter->link_speed,
3090                                                          &adapter->link_duplex);
3091
3092                         ctrl = rd32(E1000_CTRL);
3093                         /* Links status message must follow this format */
3094                         printk(KERN_INFO "igb: %s NIC Link is Up %d Mbps %s, "
3095                                  "Flow Control: %s\n",
3096                                netdev->name,
3097                                adapter->link_speed,
3098                                adapter->link_duplex == FULL_DUPLEX ?
3099                                  "Full Duplex" : "Half Duplex",
3100                                ((ctrl & E1000_CTRL_TFCE) &&
3101                                 (ctrl & E1000_CTRL_RFCE)) ? "RX/TX" :
3102                                ((ctrl & E1000_CTRL_RFCE) ?  "RX" :
3103                                ((ctrl & E1000_CTRL_TFCE) ?  "TX" : "None")));
3104
3105                         /* adjust timeout factor according to speed/duplex */
3106                         adapter->tx_timeout_factor = 1;
3107                         switch (adapter->link_speed) {
3108                         case SPEED_10:
3109                                 adapter->tx_timeout_factor = 14;
3110                                 break;
3111                         case SPEED_100:
3112                                 /* maybe add some timeout factor ? */
3113                                 break;
3114                         }
3115
3116                         netif_carrier_on(netdev);
3117
3118                         igb_ping_all_vfs(adapter);
3119
3120                         /* link state has changed, schedule phy info update */
3121                         if (!test_bit(__IGB_DOWN, &adapter->state))
3122                                 mod_timer(&adapter->phy_info_timer,
3123                                           round_jiffies(jiffies + 2 * HZ));
3124                 }
3125         } else {
3126                 if (netif_carrier_ok(netdev)) {
3127                         adapter->link_speed = 0;
3128                         adapter->link_duplex = 0;
3129                         /* Links status message must follow this format */
3130                         printk(KERN_INFO "igb: %s NIC Link is Down\n",
3131                                netdev->name);
3132                         netif_carrier_off(netdev);
3133
3134                         igb_ping_all_vfs(adapter);
3135
3136                         /* link state has changed, schedule phy info update */
3137                         if (!test_bit(__IGB_DOWN, &adapter->state))
3138                                 mod_timer(&adapter->phy_info_timer,
3139                                           round_jiffies(jiffies + 2 * HZ));
3140                 }
3141         }
3142
3143         igb_update_stats(adapter);
3144
3145         for (i = 0; i < adapter->num_tx_queues; i++) {
3146                 struct igb_ring *tx_ring = adapter->tx_ring[i];
3147                 if (!netif_carrier_ok(netdev)) {
3148                         /* We've lost link, so the controller stops DMA,
3149                          * but we've got queued Tx work that's never going
3150                          * to get done, so reset controller to flush Tx.
3151                          * (Do the reset outside of interrupt context). */
3152                         if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) {
3153                                 adapter->tx_timeout_count++;
3154                                 schedule_work(&adapter->reset_task);
3155                                 /* return immediately since reset is imminent */
3156                                 return;
3157                         }
3158                 }
3159
3160                 /* Force detection of hung controller every watchdog period */
3161                 tx_ring->detect_tx_hung = true;
3162         }
3163
3164         /* Cause software interrupt to ensure rx ring is cleaned */
3165         if (adapter->msix_entries) {
3166                 u32 eics = 0;
3167                 for (i = 0; i < adapter->num_q_vectors; i++) {
3168                         struct igb_q_vector *q_vector = adapter->q_vector[i];
3169                         eics |= q_vector->eims_value;
3170                 }
3171                 wr32(E1000_EICS, eics);
3172         } else {
3173                 wr32(E1000_ICS, E1000_ICS_RXDMT0);
3174         }
3175
3176         /* Reset the timer */
3177         if (!test_bit(__IGB_DOWN, &adapter->state))
3178                 mod_timer(&adapter->watchdog_timer,
3179                           round_jiffies(jiffies + 2 * HZ));
3180 }
3181
3182 enum latency_range {
3183         lowest_latency = 0,
3184         low_latency = 1,
3185         bulk_latency = 2,
3186         latency_invalid = 255
3187 };
3188
3189 /**
3190  * igb_update_ring_itr - update the dynamic ITR value based on packet size
3191  *
3192  *      Stores a new ITR value based on strictly on packet size.  This
3193  *      algorithm is less sophisticated than that used in igb_update_itr,
3194  *      due to the difficulty of synchronizing statistics across multiple
3195  *      receive rings.  The divisors and thresholds used by this fuction
3196  *      were determined based on theoretical maximum wire speed and testing
3197  *      data, in order to minimize response time while increasing bulk
3198  *      throughput.
3199  *      This functionality is controlled by the InterruptThrottleRate module
3200  *      parameter (see igb_param.c)
3201  *      NOTE:  This function is called only when operating in a multiqueue
3202  *             receive environment.
3203  * @q_vector: pointer to q_vector
3204  **/
3205 static void igb_update_ring_itr(struct igb_q_vector *q_vector)
3206 {
3207         int new_val = q_vector->itr_val;
3208         int avg_wire_size = 0;
3209         struct igb_adapter *adapter = q_vector->adapter;
3210
3211         /* For non-gigabit speeds, just fix the interrupt rate at 4000
3212          * ints/sec - ITR timer value of 120 ticks.
3213          */
3214         if (adapter->link_speed != SPEED_1000) {
3215                 new_val = 976;
3216                 goto set_itr_val;
3217         }
3218
3219         if (q_vector->rx_ring && q_vector->rx_ring->total_packets) {
3220                 struct igb_ring *ring = q_vector->rx_ring;
3221                 avg_wire_size = ring->total_bytes / ring->total_packets;
3222         }
3223
3224         if (q_vector->tx_ring && q_vector->tx_ring->total_packets) {
3225                 struct igb_ring *ring = q_vector->tx_ring;
3226                 avg_wire_size = max_t(u32, avg_wire_size,
3227                                       (ring->total_bytes /
3228                                        ring->total_packets));
3229         }
3230
3231         /* if avg_wire_size isn't set no work was done */
3232         if (!avg_wire_size)
3233                 goto clear_counts;
3234
3235         /* Add 24 bytes to size to account for CRC, preamble, and gap */
3236         avg_wire_size += 24;
3237
3238         /* Don't starve jumbo frames */
3239         avg_wire_size = min(avg_wire_size, 3000);
3240
3241         /* Give a little boost to mid-size frames */
3242         if ((avg_wire_size > 300) && (avg_wire_size < 1200))
3243                 new_val = avg_wire_size / 3;
3244         else
3245                 new_val = avg_wire_size / 2;
3246
3247         /* when in itr mode 3 do not exceed 20K ints/sec */
3248         if (adapter->rx_itr_setting == 3 && new_val < 196)
3249                 new_val = 196;
3250
3251 set_itr_val:
3252         if (new_val != q_vector->itr_val) {
3253                 q_vector->itr_val = new_val;
3254                 q_vector->set_itr = 1;
3255         }
3256 clear_counts:
3257         if (q_vector->rx_ring) {
3258                 q_vector->rx_ring->total_bytes = 0;
3259                 q_vector->rx_ring->total_packets = 0;
3260         }
3261         if (q_vector->tx_ring) {
3262                 q_vector->tx_ring->total_bytes = 0;
3263                 q_vector->tx_ring->total_packets = 0;
3264         }
3265 }
3266
3267 /**
3268  * igb_update_itr - update the dynamic ITR value based on statistics
3269  *      Stores a new ITR value based on packets and byte
3270  *      counts during the last interrupt.  The advantage of per interrupt
3271  *      computation is faster updates and more accurate ITR for the current
3272  *      traffic pattern.  Constants in this function were computed
3273  *      based on theoretical maximum wire speed and thresholds were set based
3274  *      on testing data as well as attempting to minimize response time
3275  *      while increasing bulk throughput.
3276  *      this functionality is controlled by the InterruptThrottleRate module
3277  *      parameter (see igb_param.c)
3278  *      NOTE:  These calculations are only valid when operating in a single-
3279  *             queue environment.
3280  * @adapter: pointer to adapter
3281  * @itr_setting: current q_vector->itr_val
3282  * @packets: the number of packets during this measurement interval
3283  * @bytes: the number of bytes during this measurement interval
3284  **/
3285 static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting,
3286                                    int packets, int bytes)
3287 {
3288         unsigned int retval = itr_setting;
3289
3290         if (packets == 0)
3291                 goto update_itr_done;
3292
3293         switch (itr_setting) {
3294         case lowest_latency:
3295                 /* handle TSO and jumbo frames */
3296                 if (bytes/packets > 8000)
3297                         retval = bulk_latency;
3298                 else if ((packets < 5) && (bytes > 512))
3299                         retval = low_latency;
3300                 break;
3301         case low_latency:  /* 50 usec aka 20000 ints/s */
3302                 if (bytes > 10000) {
3303                         /* this if handles the TSO accounting */
3304                         if (bytes/packets > 8000) {
3305                                 retval = bulk_latency;
3306                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
3307                                 retval = bulk_latency;
3308                         } else if ((packets > 35)) {
3309                                 retval = lowest_latency;
3310                         }
3311                 } else if (bytes/packets > 2000) {
3312                         retval = bulk_latency;
3313                 } else if (packets <= 2 && bytes < 512) {
3314                         retval = lowest_latency;
3315                 }
3316                 break;
3317         case bulk_latency: /* 250 usec aka 4000 ints/s */
3318                 if (bytes > 25000) {
3319                         if (packets > 35)
3320                                 retval = low_latency;
3321                 } else if (bytes < 1500) {
3322                         retval = low_latency;
3323                 }
3324                 break;
3325         }
3326
3327 update_itr_done:
3328         return retval;
3329 }
3330
3331 static void igb_set_itr(struct igb_adapter *adapter)
3332 {
3333         struct igb_q_vector *q_vector = adapter->q_vector[0];
3334         u16 current_itr;
3335         u32 new_itr = q_vector->itr_val;
3336
3337         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
3338         if (adapter->link_speed != SPEED_1000) {
3339                 current_itr = 0;
3340                 new_itr = 4000;
3341                 goto set_itr_now;
3342         }
3343
3344         adapter->rx_itr = igb_update_itr(adapter,
3345                                     adapter->rx_itr,
3346                                     q_vector->rx_ring->total_packets,
3347                                     q_vector->rx_ring->total_bytes);
3348
3349         adapter->tx_itr = igb_update_itr(adapter,
3350                                     adapter->tx_itr,
3351                                     q_vector->tx_ring->total_packets,
3352                                     q_vector->tx_ring->total_bytes);
3353         current_itr = max(adapter->rx_itr, adapter->tx_itr);
3354
3355         /* conservative mode (itr 3) eliminates the lowest_latency setting */
3356         if (adapter->rx_itr_setting == 3 && current_itr == lowest_latency)
3357                 current_itr = low_latency;
3358
3359         switch (current_itr) {
3360         /* counts and packets in update_itr are dependent on these numbers */
3361         case lowest_latency:
3362                 new_itr = 56;  /* aka 70,000 ints/sec */
3363                 break;
3364         case low_latency:
3365                 new_itr = 196; /* aka 20,000 ints/sec */
3366                 break;
3367         case bulk_latency:
3368                 new_itr = 980; /* aka 4,000 ints/sec */
3369                 break;
3370         default:
3371                 break;
3372         }
3373
3374 set_itr_now:
3375         q_vector->rx_ring->total_bytes = 0;
3376         q_vector->rx_ring->total_packets = 0;
3377         q_vector->tx_ring->total_bytes = 0;
3378         q_vector->tx_ring->total_packets = 0;
3379
3380         if (new_itr != q_vector->itr_val) {
3381                 /* this attempts to bias the interrupt rate towards Bulk
3382                  * by adding intermediate steps when interrupt rate is
3383                  * increasing */
3384                 new_itr = new_itr > q_vector->itr_val ?
3385                              max((new_itr * q_vector->itr_val) /
3386                                  (new_itr + (q_vector->itr_val >> 2)),
3387                                  new_itr) :
3388                              new_itr;
3389                 /* Don't write the value here; it resets the adapter's
3390                  * internal timer, and causes us to delay far longer than
3391                  * we should between interrupts.  Instead, we write the ITR
3392                  * value at the beginning of the next interrupt so the timing
3393                  * ends up being correct.
3394                  */
3395                 q_vector->itr_val = new_itr;
3396                 q_vector->set_itr = 1;
3397         }
3398
3399         return;
3400 }
3401
3402 #define IGB_TX_FLAGS_CSUM               0x00000001
3403 #define IGB_TX_FLAGS_VLAN               0x00000002
3404 #define IGB_TX_FLAGS_TSO                0x00000004
3405 #define IGB_TX_FLAGS_IPV4               0x00000008
3406 #define IGB_TX_FLAGS_TSTAMP             0x00000010
3407 #define IGB_TX_FLAGS_VLAN_MASK          0xffff0000
3408 #define IGB_TX_FLAGS_VLAN_SHIFT                 16
3409
3410 static inline int igb_tso_adv(struct igb_ring *tx_ring,
3411                               struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
3412 {
3413         struct e1000_adv_tx_context_desc *context_desc;
3414         unsigned int i;
3415         int err;
3416         struct igb_buffer *buffer_info;
3417         u32 info = 0, tu_cmd = 0;
3418         u32 mss_l4len_idx;
3419         u8 l4len;
3420
3421         if (skb_header_cloned(skb)) {
3422                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3423                 if (err)
3424                         return err;
3425         }
3426
3427         l4len = tcp_hdrlen(skb);
3428         *hdr_len += l4len;
3429
3430         if (skb->protocol == htons(ETH_P_IP)) {
3431                 struct iphdr *iph = ip_hdr(skb);
3432                 iph->tot_len = 0;
3433                 iph->check = 0;
3434                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3435                                                          iph->daddr, 0,
3436                                                          IPPROTO_TCP,
3437                                                          0);
3438         } else if (skb_is_gso_v6(skb)) {
3439                 ipv6_hdr(skb)->payload_len = 0;
3440                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3441                                                        &ipv6_hdr(skb)->daddr,
3442                                                        0, IPPROTO_TCP, 0);
3443         }
3444
3445         i = tx_ring->next_to_use;
3446
3447         buffer_info = &tx_ring->buffer_info[i];
3448         context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
3449         /* VLAN MACLEN IPLEN */
3450         if (tx_flags & IGB_TX_FLAGS_VLAN)
3451                 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
3452         info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
3453         *hdr_len += skb_network_offset(skb);
3454         info |= skb_network_header_len(skb);
3455         *hdr_len += skb_network_header_len(skb);
3456         context_desc->vlan_macip_lens = cpu_to_le32(info);
3457
3458         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3459         tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
3460
3461         if (skb->protocol == htons(ETH_P_IP))
3462                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
3463         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
3464
3465         context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
3466
3467         /* MSS L4LEN IDX */
3468         mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
3469         mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
3470
3471         /* For 82575, context index must be unique per ring. */
3472         if (tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX)
3473                 mss_l4len_idx |= tx_ring->reg_idx << 4;
3474
3475         context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3476         context_desc->seqnum_seed = 0;
3477
3478         buffer_info->time_stamp = jiffies;
3479         buffer_info->next_to_watch = i;
3480         buffer_info->dma = 0;
3481         i++;
3482         if (i == tx_ring->count)
3483                 i = 0;
3484
3485         tx_ring->next_to_use = i;
3486
3487         return true;
3488 }
3489
3490 static inline bool igb_tx_csum_adv(struct igb_ring *tx_ring,
3491                                    struct sk_buff *skb, u32 tx_flags)
3492 {
3493         struct e1000_adv_tx_context_desc *context_desc;
3494         struct pci_dev *pdev = tx_ring->pdev;
3495         struct igb_buffer *buffer_info;
3496         u32 info = 0, tu_cmd = 0;
3497         unsigned int i;
3498
3499         if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
3500             (tx_flags & IGB_TX_FLAGS_VLAN)) {
3501                 i = tx_ring->next_to_use;
3502                 buffer_info = &tx_ring->buffer_info[i];
3503                 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
3504
3505                 if (tx_flags & IGB_TX_FLAGS_VLAN)
3506                         info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
3507
3508                 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
3509                 if (skb->ip_summed == CHECKSUM_PARTIAL)
3510                         info |= skb_network_header_len(skb);
3511
3512                 context_desc->vlan_macip_lens = cpu_to_le32(info);
3513
3514                 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
3515
3516                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3517                         __be16 protocol;
3518
3519                         if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
3520                                 const struct vlan_ethhdr *vhdr =
3521                                           (const struct vlan_ethhdr*)skb->data;
3522
3523                                 protocol = vhdr->h_vlan_encapsulated_proto;
3524                         } else {
3525                                 protocol = skb->protocol;
3526                         }
3527
3528                         switch (protocol) {
3529                         case cpu_to_be16(ETH_P_IP):
3530                                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
3531                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3532                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
3533                                 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
3534                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_SCTP;
3535                                 break;
3536                         case cpu_to_be16(ETH_P_IPV6):
3537                                 /* XXX what about other V6 headers?? */
3538                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3539                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
3540                                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
3541                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_SCTP;
3542                                 break;
3543                         default:
3544                                 if (unlikely(net_ratelimit()))
3545                                         dev_warn(&pdev->dev,
3546                                             "partial checksum but proto=%x!\n",
3547                                             skb->protocol);
3548                                 break;
3549                         }
3550                 }
3551
3552                 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
3553                 context_desc->seqnum_seed = 0;
3554                 if (tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX)
3555                         context_desc->mss_l4len_idx =
3556                                 cpu_to_le32(tx_ring->reg_idx << 4);
3557
3558                 buffer_info->time_stamp = jiffies;
3559                 buffer_info->next_to_watch = i;
3560                 buffer_info->dma = 0;
3561
3562                 i++;
3563                 if (i == tx_ring->count)
3564                         i = 0;
3565                 tx_ring->next_to_use = i;
3566
3567                 return true;
3568         }
3569         return false;
3570 }
3571
3572 #define IGB_MAX_TXD_PWR 16
3573 #define IGB_MAX_DATA_PER_TXD    (1<<IGB_MAX_TXD_PWR)
3574
3575 static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb,
3576                                  unsigned int first)
3577 {
3578         struct igb_buffer *buffer_info;
3579         struct pci_dev *pdev = tx_ring->pdev;
3580         unsigned int len = skb_headlen(skb);
3581         unsigned int count = 0, i;
3582         unsigned int f;
3583
3584         i = tx_ring->next_to_use;
3585
3586         buffer_info = &tx_ring->buffer_info[i];
3587         BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
3588         buffer_info->length = len;
3589         /* set time_stamp *before* dma to help avoid a possible race */
3590         buffer_info->time_stamp = jiffies;
3591         buffer_info->next_to_watch = i;
3592         buffer_info->dma = pci_map_single(pdev, skb->data, len,
3593                                           PCI_DMA_TODEVICE);
3594         if (pci_dma_mapping_error(pdev, buffer_info->dma))
3595                 goto dma_error;
3596
3597         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
3598                 struct skb_frag_struct *frag;
3599
3600                 count++;
3601                 i++;
3602                 if (i == tx_ring->count)
3603                         i = 0;
3604
3605                 frag = &skb_shinfo(skb)->frags[f];
3606                 len = frag->size;
3607
3608                 buffer_info = &tx_ring->buffer_info[i];
3609                 BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
3610                 buffer_info->length = len;
3611                 buffer_info->time_stamp = jiffies;
3612                 buffer_info->next_to_watch = i;
3613                 buffer_info->mapped_as_page = true;
3614                 buffer_info->dma = pci_map_page(pdev,
3615                                                 frag->page,
3616                                                 frag->page_offset,
3617                                                 len,
3618                                                 PCI_DMA_TODEVICE);
3619                 if (pci_dma_mapping_error(pdev, buffer_info->dma))
3620                         goto dma_error;
3621
3622         }
3623
3624         tx_ring->buffer_info[i].skb = skb;
3625         tx_ring->buffer_info[i].gso_segs = skb_shinfo(skb)->gso_segs ?: 1;
3626         tx_ring->buffer_info[first].next_to_watch = i;
3627
3628         return ++count;
3629
3630 dma_error:
3631         dev_err(&pdev->dev, "TX DMA map failed\n");
3632
3633         /* clear timestamp and dma mappings for failed buffer_info mapping */
3634         buffer_info->dma = 0;
3635         buffer_info->time_stamp = 0;
3636         buffer_info->length = 0;
3637         buffer_info->next_to_watch = 0;
3638         buffer_info->mapped_as_page = false;
3639
3640         /* clear timestamp and dma mappings for remaining portion of packet */
3641         while (count--) {
3642                 if (i == 0)
3643                         i = tx_ring->count;
3644                 i--;
3645                 buffer_info = &tx_ring->buffer_info[i];
3646                 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
3647         }
3648
3649         return 0;
3650 }
3651
3652 static inline void igb_tx_queue_adv(struct igb_ring *tx_ring,
3653                                     u32 tx_flags, int count, u32 paylen,
3654                                     u8 hdr_len)
3655 {
3656         union e1000_adv_tx_desc *tx_desc;
3657         struct igb_buffer *buffer_info;
3658         u32 olinfo_status = 0, cmd_type_len;
3659         unsigned int i = tx_ring->next_to_use;
3660
3661         cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
3662                         E1000_ADVTXD_DCMD_DEXT);
3663
3664         if (tx_flags & IGB_TX_FLAGS_VLAN)
3665                 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
3666
3667         if (tx_flags & IGB_TX_FLAGS_TSTAMP)
3668                 cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP;
3669
3670         if (tx_flags & IGB_TX_FLAGS_TSO) {
3671                 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
3672
3673                 /* insert tcp checksum */
3674                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
3675
3676                 /* insert ip checksum */
3677                 if (tx_flags & IGB_TX_FLAGS_IPV4)
3678                         olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
3679
3680         } else if (tx_flags & IGB_TX_FLAGS_CSUM) {
3681                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
3682         }
3683
3684         if ((tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX) &&
3685             (tx_flags & (IGB_TX_FLAGS_CSUM |
3686                          IGB_TX_FLAGS_TSO |
3687                          IGB_TX_FLAGS_VLAN)))
3688                 olinfo_status |= tx_ring->reg_idx << 4;
3689
3690         olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
3691
3692         do {
3693                 buffer_info = &tx_ring->buffer_info[i];
3694                 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
3695                 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
3696                 tx_desc->read.cmd_type_len =
3697                         cpu_to_le32(cmd_type_len | buffer_info->length);
3698                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3699                 count--;
3700                 i++;
3701                 if (i == tx_ring->count)
3702                         i = 0;
3703         } while (count > 0);
3704
3705         tx_desc->read.cmd_type_len |= cpu_to_le32(IGB_ADVTXD_DCMD);
3706         /* Force memory writes to complete before letting h/w
3707          * know there are new descriptors to fetch.  (Only
3708          * applicable for weak-ordered memory model archs,
3709          * such as IA-64). */
3710         wmb();
3711
3712         tx_ring->next_to_use = i;
3713         writel(i, tx_ring->tail);
3714         /* we need this if more than one processor can write to our tail
3715          * at a time, it syncronizes IO on IA64/Altix systems */
3716         mmiowb();
3717 }
3718
3719 static int __igb_maybe_stop_tx(struct igb_ring *tx_ring, int size)
3720 {
3721         struct net_device *netdev = tx_ring->netdev;
3722
3723         netif_stop_subqueue(netdev, tx_ring->queue_index);
3724
3725         /* Herbert's original patch had:
3726          *  smp_mb__after_netif_stop_queue();
3727          * but since that doesn't exist yet, just open code it. */
3728         smp_mb();
3729
3730         /* We need to check again in a case another CPU has just
3731          * made room available. */
3732         if (igb_desc_unused(tx_ring) < size)
3733                 return -EBUSY;
3734
3735         /* A reprieve! */
3736         netif_wake_subqueue(netdev, tx_ring->queue_index);
3737         tx_ring->tx_stats.restart_queue++;
3738         return 0;
3739 }
3740
3741 static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, int size)
3742 {
3743         if (igb_desc_unused(tx_ring) >= size)
3744                 return 0;
3745         return __igb_maybe_stop_tx(tx_ring, size);
3746 }
3747
3748 netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
3749                                     struct igb_ring *tx_ring)
3750 {
3751         struct igb_adapter *adapter = netdev_priv(tx_ring->netdev);
3752         int tso = 0, count;
3753         u32 tx_flags = 0;
3754         u16 first;
3755         u8 hdr_len = 0;
3756         union skb_shared_tx *shtx = skb_tx(skb);
3757
3758         /* need: 1 descriptor per page,
3759          *       + 2 desc gap to keep tail from touching head,
3760          *       + 1 desc for skb->data,
3761          *       + 1 desc for context descriptor,
3762          * otherwise try next time */
3763         if (igb_maybe_stop_tx(tx_ring, skb_shinfo(skb)->nr_frags + 4)) {
3764                 /* this is a hard error */
3765                 return NETDEV_TX_BUSY;
3766         }
3767
3768         if (unlikely(shtx->hardware)) {
3769                 shtx->in_progress = 1;
3770                 tx_flags |= IGB_TX_FLAGS_TSTAMP;
3771         }
3772
3773         if (vlan_tx_tag_present(skb) && adapter->vlgrp) {
3774                 tx_flags |= IGB_TX_FLAGS_VLAN;
3775                 tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT);
3776         }
3777
3778         if (skb->protocol == htons(ETH_P_IP))
3779                 tx_flags |= IGB_TX_FLAGS_IPV4;
3780
3781         first = tx_ring->next_to_use;
3782         if (skb_is_gso(skb)) {
3783                 tso = igb_tso_adv(tx_ring, skb, tx_flags, &hdr_len);
3784
3785                 if (tso < 0) {
3786                         dev_kfree_skb_any(skb);
3787                         return NETDEV_TX_OK;
3788                 }
3789         }
3790
3791         if (tso)
3792                 tx_flags |= IGB_TX_FLAGS_TSO;
3793         else if (igb_tx_csum_adv(tx_ring, skb, tx_flags) &&
3794                  (skb->ip_summed == CHECKSUM_PARTIAL))
3795                 tx_flags |= IGB_TX_FLAGS_CSUM;
3796
3797         /*
3798          * count reflects descriptors mapped, if 0 or less then mapping error
3799          * has occured and we need to rewind the descriptor queue
3800          */
3801         count = igb_tx_map_adv(tx_ring, skb, first);
3802         if (!count) {
3803                 dev_kfree_skb_any(skb);
3804                 tx_ring->buffer_info[first].time_stamp = 0;
3805                 tx_ring->next_to_use = first;
3806                 return NETDEV_TX_OK;
3807         }
3808
3809         igb_tx_queue_adv(tx_ring, tx_flags, count, skb->len, hdr_len);
3810
3811         /* Make sure there is space in the ring for the next send. */
3812         igb_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 4);
3813
3814         return NETDEV_TX_OK;
3815 }
3816
3817 static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb,
3818                                       struct net_device *netdev)
3819 {
3820         struct igb_adapter *adapter = netdev_priv(netdev);
3821         struct igb_ring *tx_ring;
3822         int r_idx = 0;
3823
3824         if (test_bit(__IGB_DOWN, &adapter->state)) {
3825                 dev_kfree_skb_any(skb);
3826                 return NETDEV_TX_OK;
3827         }
3828
3829         if (skb->len <= 0) {
3830                 dev_kfree_skb_any(skb);
3831                 return NETDEV_TX_OK;
3832         }
3833
3834         r_idx = skb->queue_mapping & (IGB_ABS_MAX_TX_QUEUES - 1);
3835         tx_ring = adapter->multi_tx_table[r_idx];
3836
3837         /* This goes back to the question of how to logically map a tx queue
3838          * to a flow.  Right now, performance is impacted slightly negatively
3839          * if using multiple tx queues.  If the stack breaks away from a
3840          * single qdisc implementation, we can look at this again. */
3841         return igb_xmit_frame_ring_adv(skb, tx_ring);
3842 }
3843
3844 /**
3845  * igb_tx_timeout - Respond to a Tx Hang
3846  * @netdev: network interface device structure
3847  **/
3848 static void igb_tx_timeout(struct net_device *netdev)
3849 {
3850         struct igb_adapter *adapter = netdev_priv(netdev);
3851         struct e1000_hw *hw = &adapter->hw;
3852
3853         /* Do the reset outside of interrupt context */
3854         adapter->tx_timeout_count++;
3855
3856         if (hw->mac.type == e1000_82580)
3857                 hw->dev_spec._82575.global_device_reset = true;
3858
3859         schedule_work(&adapter->reset_task);
3860         wr32(E1000_EICS,
3861              (adapter->eims_enable_mask & ~adapter->eims_other));
3862 }
3863
3864 static void igb_reset_task(struct work_struct *work)
3865 {
3866         struct igb_adapter *adapter;
3867         adapter = container_of(work, struct igb_adapter, reset_task);
3868
3869         igb_reinit_locked(adapter);
3870 }
3871
3872 /**
3873  * igb_get_stats - Get System Network Statistics
3874  * @netdev: network interface device structure
3875  *
3876  * Returns the address of the device statistics structure.
3877  * The statistics are actually updated from the timer callback.
3878  **/
3879 static struct net_device_stats *igb_get_stats(struct net_device *netdev)
3880 {
3881         /* only return the current stats */
3882         return &netdev->stats;
3883 }
3884
3885 /**
3886  * igb_change_mtu - Change the Maximum Transfer Unit
3887  * @netdev: network interface device structure
3888  * @new_mtu: new value for maximum frame size
3889  *
3890  * Returns 0 on success, negative on failure
3891  **/
3892 static int igb_change_mtu(struct net_device *netdev, int new_mtu)
3893 {
3894         struct igb_adapter *adapter = netdev_priv(netdev);
3895         struct pci_dev *pdev = adapter->pdev;
3896         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3897         u32 rx_buffer_len, i;
3898
3899         if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3900                 dev_err(&pdev->dev, "Invalid MTU setting\n");
3901                 return -EINVAL;
3902         }
3903
3904         if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3905                 dev_err(&pdev->dev, "MTU > 9216 not supported.\n");
3906                 return -EINVAL;
3907         }
3908
3909         while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
3910                 msleep(1);
3911
3912         /* igb_down has a dependency on max_frame_size */
3913         adapter->max_frame_size = max_frame;
3914
3915         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3916          * means we reserve 2 more, this pushes us to allocate from the next
3917          * larger slab size.
3918          * i.e. RXBUFFER_2048 --> size-4096 slab
3919          */
3920
3921         if (max_frame <= IGB_RXBUFFER_1024)
3922                 rx_buffer_len = IGB_RXBUFFER_1024;
3923         else if (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)
3924                 rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3925         else
3926                 rx_buffer_len = IGB_RXBUFFER_128;
3927
3928         if (netif_running(netdev))
3929                 igb_down(adapter);
3930
3931         dev_info(&pdev->dev, "changing MTU from %d to %d\n",
3932                  netdev->mtu, new_mtu);
3933         netdev->mtu = new_mtu;
3934
3935         for (i = 0; i < adapter->num_rx_queues; i++)
3936                 adapter->rx_ring[i]->rx_buffer_len = rx_buffer_len;
3937
3938         if (netif_running(netdev))
3939                 igb_up(adapter);
3940         else
3941                 igb_reset(adapter);
3942
3943         clear_bit(__IGB_RESETTING, &adapter->state);
3944
3945         return 0;
3946 }
3947
3948 /**
3949  * igb_update_stats - Update the board statistics counters
3950  * @adapter: board private structure
3951  **/
3952
3953 void igb_update_stats(struct igb_adapter *adapter)
3954 {
3955         struct net_device_stats *net_stats = igb_get_stats(adapter->netdev);
3956         struct e1000_hw *hw = &adapter->hw;
3957         struct pci_dev *pdev = adapter->pdev;
3958         u32 reg, mpc;
3959         u16 phy_tmp;
3960         int i;
3961         u64 bytes, packets;
3962
3963 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3964
3965         /*
3966          * Prevent stats update while adapter is being reset, or if the pci
3967          * connection is down.
3968          */
3969         if (adapter->link_speed == 0)
3970                 return;
3971         if (pci_channel_offline(pdev))
3972                 return;
3973
3974         bytes = 0;
3975         packets = 0;
3976         for (i = 0; i < adapter->num_rx_queues; i++) {
3977                 u32 rqdpc_tmp = rd32(E1000_RQDPC(i)) & 0x0FFF;
3978                 struct igb_ring *ring = adapter->rx_ring[i];
3979                 ring->rx_stats.drops += rqdpc_tmp;
3980                 net_stats->rx_fifo_errors += rqdpc_tmp;
3981                 bytes += ring->rx_stats.bytes;
3982                 packets += ring->rx_stats.packets;
3983         }
3984
3985         net_stats->rx_bytes = bytes;
3986         net_stats->rx_packets = packets;
3987
3988         bytes = 0;
3989         packets = 0;
3990         for (i = 0; i < adapter->num_tx_queues; i++) {
3991                 struct igb_ring *ring = adapter->tx_ring[i];
3992                 bytes += ring->tx_stats.bytes;
3993                 packets += ring->tx_stats.packets;
3994         }
3995         net_stats->tx_bytes = bytes;
3996         net_stats->tx_packets = packets;
3997
3998         /* read stats registers */
3999         adapter->stats.crcerrs += rd32(E1000_CRCERRS);
4000         adapter->stats.gprc += rd32(E1000_GPRC);
4001         adapter->stats.gorc += rd32(E1000_GORCL);
4002         rd32(E1000_GORCH); /* clear GORCL */
4003         adapter->stats.bprc += rd32(E1000_BPRC);
4004         adapter->stats.mprc += rd32(E1000_MPRC);
4005         adapter->stats.roc += rd32(E1000_ROC);
4006
4007         adapter->stats.prc64 += rd32(E1000_PRC64);
4008         adapter->stats.prc127 += rd32(E1000_PRC127);
4009         adapter->stats.prc255 += rd32(E1000_PRC255);
4010         adapter->stats.prc511 += rd32(E1000_PRC511);
4011         adapter->stats.prc1023 += rd32(E1000_PRC1023);
4012         adapter->stats.prc1522 += rd32(E1000_PRC1522);
4013         adapter->stats.symerrs += rd32(E1000_SYMERRS);
4014         adapter->stats.sec += rd32(E1000_SEC);
4015
4016         mpc = rd32(E1000_MPC);
4017         adapter->stats.mpc += mpc;
4018         net_stats->rx_fifo_errors += mpc;
4019         adapter->stats.scc += rd32(E1000_SCC);
4020         adapter->stats.ecol += rd32(E1000_ECOL);
4021         adapter->stats.mcc += rd32(E1000_MCC);
4022         adapter->stats.latecol += rd32(E1000_LATECOL);
4023         adapter->stats.dc += rd32(E1000_DC);
4024         adapter->stats.rlec += rd32(E1000_RLEC);
4025         adapter->stats.xonrxc += rd32(E1000_XONRXC);
4026         adapter->stats.xontxc += rd32(E1000_XONTXC);
4027         adapter->stats.xoffrxc += rd32(E1000_XOFFRXC);
4028         adapter->stats.xofftxc += rd32(E1000_XOFFTXC);
4029         adapter->stats.fcruc += rd32(E1000_FCRUC);
4030         adapter->stats.gptc += rd32(E1000_GPTC);
4031         adapter->stats.gotc += rd32(E1000_GOTCL);
4032         rd32(E1000_GOTCH); /* clear GOTCL */
4033         adapter->stats.rnbc += rd32(E1000_RNBC);
4034         adapter->stats.ruc += rd32(E1000_RUC);
4035         adapter->stats.rfc += rd32(E1000_RFC);
4036         adapter->stats.rjc += rd32(E1000_RJC);
4037         adapter->stats.tor += rd32(E1000_TORH);
4038         adapter->stats.tot += rd32(E1000_TOTH);
4039         adapter->stats.tpr += rd32(E1000_TPR);
4040
4041         adapter->stats.ptc64 += rd32(E1000_PTC64);
4042         adapter->stats.ptc127 += rd32(E1000_PTC127);
4043         adapter->stats.ptc255 += rd32(E1000_PTC255);
4044         adapter->stats.ptc511 += rd32(E1000_PTC511);
4045         adapter->stats.ptc1023 += rd32(E1000_PTC1023);
4046         adapter->stats.ptc1522 += rd32(E1000_PTC1522);
4047
4048         adapter->stats.mptc += rd32(E1000_MPTC);
4049         adapter->stats.bptc += rd32(E1000_BPTC);
4050
4051         adapter->stats.tpt += rd32(E1000_TPT);
4052         adapter->stats.colc += rd32(E1000_COLC);
4053
4054         adapter->stats.algnerrc += rd32(E1000_ALGNERRC);
4055         /* read internal phy specific stats */
4056         reg = rd32(E1000_CTRL_EXT);
4057         if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) {
4058                 adapter->stats.rxerrc += rd32(E1000_RXERRC);
4059                 adapter->stats.tncrs += rd32(E1000_TNCRS);
4060         }
4061
4062         adapter->stats.tsctc += rd32(E1000_TSCTC);
4063         adapter->stats.tsctfc += rd32(E1000_TSCTFC);
4064
4065         adapter->stats.iac += rd32(E1000_IAC);
4066         adapter->stats.icrxoc += rd32(E1000_ICRXOC);
4067         adapter->stats.icrxptc += rd32(E1000_ICRXPTC);
4068         adapter->stats.icrxatc += rd32(E1000_ICRXATC);
4069         adapter->stats.ictxptc += rd32(E1000_ICTXPTC);
4070         adapter->stats.ictxatc += rd32(E1000_ICTXATC);
4071         adapter->stats.ictxqec += rd32(E1000_ICTXQEC);
4072         adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC);
4073         adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC);
4074
4075         /* Fill out the OS statistics structure */
4076         net_stats->multicast = adapter->stats.mprc;
4077         net_stats->collisions = adapter->stats.colc;
4078
4079         /* Rx Errors */
4080
4081         /* RLEC on some newer hardware can be incorrect so build
4082          * our own version based on RUC and ROC */
4083         net_stats->rx_errors = adapter->stats.rxerrc +
4084                 adapter->stats.crcerrs + adapter->stats.algnerrc +
4085                 adapter->stats.ruc + adapter->stats.roc +
4086                 adapter->stats.cexterr;
4087         net_stats->rx_length_errors = adapter->stats.ruc +
4088                                       adapter->stats.roc;
4089         net_stats->rx_crc_errors = adapter->stats.crcerrs;
4090         net_stats->rx_frame_errors = adapter->stats.algnerrc;
4091         net_stats->rx_missed_errors = adapter->stats.mpc;
4092
4093         /* Tx Errors */
4094         net_stats->tx_errors = adapter->stats.ecol +
4095                                adapter->stats.latecol;
4096         net_stats->tx_aborted_errors = adapter->stats.ecol;
4097         net_stats->tx_window_errors = adapter->stats.latecol;
4098         net_stats->tx_carrier_errors = adapter->stats.tncrs;
4099
4100         /* Tx Dropped needs to be maintained elsewhere */
4101
4102         /* Phy Stats */
4103         if (hw->phy.media_type == e1000_media_type_copper) {
4104                 if ((adapter->link_speed == SPEED_1000) &&
4105                    (!igb_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
4106                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
4107                         adapter->phy_stats.idle_errors += phy_tmp;
4108                 }
4109         }
4110
4111         /* Management Stats */
4112         adapter->stats.mgptc += rd32(E1000_MGTPTC);
4113         adapter->stats.mgprc += rd32(E1000_MGTPRC);
4114         adapter->stats.mgpdc += rd32(E1000_MGTPDC);
4115 }
4116
4117 static irqreturn_t igb_msix_other(int irq, void *data)
4118 {
4119         struct igb_adapter *adapter = data;
4120         struct e1000_hw *hw = &adapter->hw;
4121         u32 icr = rd32(E1000_ICR);
4122         /* reading ICR causes bit 31 of EICR to be cleared */
4123
4124         if (icr & E1000_ICR_DRSTA)
4125                 schedule_work(&adapter->reset_task);
4126
4127         if (icr & E1000_ICR_DOUTSYNC) {
4128                 /* HW is reporting DMA is out of sync */
4129                 adapter->stats.doosync++;
4130         }
4131
4132         /* Check for a mailbox event */
4133         if (icr & E1000_ICR_VMMB)
4134                 igb_msg_task(adapter);
4135
4136         if (icr & E1000_ICR_LSC) {
4137                 hw->mac.get_link_status = 1;
4138                 /* guard against interrupt when we're going down */
4139                 if (!test_bit(__IGB_DOWN, &adapter->state))
4140                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
4141         }
4142
4143         if (adapter->vfs_allocated_count)
4144                 wr32(E1000_IMS, E1000_IMS_LSC |
4145                                 E1000_IMS_VMMB |
4146                                 E1000_IMS_DOUTSYNC);
4147         else
4148                 wr32(E1000_IMS, E1000_IMS_LSC | E1000_IMS_DOUTSYNC);
4149         wr32(E1000_EIMS, adapter->eims_other);
4150
4151         return IRQ_HANDLED;
4152 }
4153
4154 static void igb_write_itr(struct igb_q_vector *q_vector)
4155 {
4156         struct igb_adapter *adapter = q_vector->adapter;
4157         u32 itr_val = q_vector->itr_val & 0x7FFC;
4158
4159         if (!q_vector->set_itr)
4160                 return;
4161
4162         if (!itr_val)
4163                 itr_val = 0x4;
4164
4165         if (adapter->hw.mac.type == e1000_82575)
4166                 itr_val |= itr_val << 16;
4167         else
4168                 itr_val |= 0x8000000;
4169
4170         writel(itr_val, q_vector->itr_register);
4171         q_vector->set_itr = 0;
4172 }
4173
4174 static irqreturn_t igb_msix_ring(int irq, void *data)
4175 {
4176         struct igb_q_vector *q_vector = data;
4177
4178         /* Write the ITR value calculated from the previous interrupt. */
4179         igb_write_itr(q_vector);
4180
4181         napi_schedule(&q_vector->napi);
4182
4183         return IRQ_HANDLED;
4184 }
4185
4186 #ifdef CONFIG_IGB_DCA
4187 static void igb_update_dca(struct igb_q_vector *q_vector)
4188 {
4189         struct igb_adapter *adapter = q_vector->adapter;
4190         struct e1000_hw *hw = &adapter->hw;
4191         int cpu = get_cpu();
4192
4193         if (q_vector->cpu == cpu)
4194                 goto out_no_update;
4195
4196         if (q_vector->tx_ring) {
4197                 int q = q_vector->tx_ring->reg_idx;
4198                 u32 dca_txctrl = rd32(E1000_DCA_TXCTRL(q));
4199                 if (hw->mac.type == e1000_82575) {
4200                         dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK;
4201                         dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
4202                 } else {
4203                         dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK_82576;
4204                         dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) <<
4205                                       E1000_DCA_TXCTRL_CPUID_SHIFT;
4206                 }
4207                 dca_txctrl |= E1000_DCA_TXCTRL_DESC_DCA_EN;
4208                 wr32(E1000_DCA_TXCTRL(q), dca_txctrl);
4209         }
4210         if (q_vector->rx_ring) {
4211                 int q = q_vector->rx_ring->reg_idx;
4212                 u32 dca_rxctrl = rd32(E1000_DCA_RXCTRL(q));
4213                 if (hw->mac.type == e1000_82575) {
4214                         dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK;
4215                         dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
4216                 } else {
4217                         dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK_82576;
4218                         dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) <<
4219                                       E1000_DCA_RXCTRL_CPUID_SHIFT;
4220                 }
4221                 dca_rxctrl |= E1000_DCA_RXCTRL_DESC_DCA_EN;
4222                 dca_rxctrl |= E1000_DCA_RXCTRL_HEAD_DCA_EN;
4223                 dca_rxctrl |= E1000_DCA_RXCTRL_DATA_DCA_EN;
4224                 wr32(E1000_DCA_RXCTRL(q), dca_rxctrl);
4225         }
4226         q_vector->cpu = cpu;
4227 out_no_update:
4228         put_cpu();
4229 }
4230
4231 static void igb_setup_dca(struct igb_adapter *adapter)
4232 {
4233         struct e1000_hw *hw = &adapter->hw;
4234         int i;
4235
4236         if (!(adapter->flags & IGB_FLAG_DCA_ENABLED))
4237                 return;
4238
4239         /* Always use CB2 mode, difference is masked in the CB driver. */
4240         wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_CB2);
4241
4242         for (i = 0; i < adapter->num_q_vectors; i++) {
4243                 adapter->q_vector[i]->cpu = -1;
4244                 igb_update_dca(adapter->q_vector[i]);
4245         }
4246 }
4247
4248 static int __igb_notify_dca(struct device *dev, void *data)
4249 {
4250         struct net_device *netdev = dev_get_drvdata(dev);
4251         struct igb_adapter *adapter = netdev_priv(netdev);
4252         struct pci_dev *pdev = adapter->pdev;
4253         struct e1000_hw *hw = &adapter->hw;
4254         unsigned long event = *(unsigned long *)data;
4255
4256         switch (event) {
4257         case DCA_PROVIDER_ADD:
4258                 /* if already enabled, don't do it again */
4259                 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
4260                         break;
4261                 if (dca_add_requester(dev) == 0) {
4262                         adapter->flags |= IGB_FLAG_DCA_ENABLED;
4263                         dev_info(&pdev->dev, "DCA enabled\n");
4264                         igb_setup_dca(adapter);
4265                         break;
4266                 }
4267                 /* Fall Through since DCA is disabled. */
4268         case DCA_PROVIDER_REMOVE:
4269                 if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
4270                         /* without this a class_device is left
4271                          * hanging around in the sysfs model */
4272                         dca_remove_requester(dev);
4273                         dev_info(&pdev->dev, "DCA disabled\n");
4274                         adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
4275                         wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE);
4276                 }
4277                 break;
4278         }
4279
4280         return 0;
4281 }
4282
4283 static int igb_notify_dca(struct notifier_block *nb, unsigned long event,
4284                           void *p)
4285 {
4286         int ret_val;
4287
4288         ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event,
4289                                          __igb_notify_dca);
4290
4291         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
4292 }
4293 #endif /* CONFIG_IGB_DCA */
4294
4295 static void igb_ping_all_vfs(struct igb_adapter *adapter)
4296 {
4297         struct e1000_hw *hw = &adapter->hw;
4298         u32 ping;
4299         int i;
4300
4301         for (i = 0 ; i < adapter->vfs_allocated_count; i++) {
4302                 ping = E1000_PF_CONTROL_MSG;
4303                 if (adapter->vf_data[i].flags & IGB_VF_FLAG_CTS)
4304                         ping |= E1000_VT_MSGTYPE_CTS;
4305                 igb_write_mbx(hw, &ping, 1, i);
4306         }
4307 }
4308
4309 static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
4310 {
4311         struct e1000_hw *hw = &adapter->hw;
4312         u32 vmolr = rd32(E1000_VMOLR(vf));
4313         struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4314
4315         vf_data->flags |= ~(IGB_VF_FLAG_UNI_PROMISC |
4316                             IGB_VF_FLAG_MULTI_PROMISC);
4317         vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
4318
4319         if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) {
4320                 vmolr |= E1000_VMOLR_MPME;
4321                 *msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST;
4322         } else {
4323                 /*
4324                  * if we have hashes and we are clearing a multicast promisc
4325                  * flag we need to write the hashes to the MTA as this step
4326                  * was previously skipped
4327                  */
4328                 if (vf_data->num_vf_mc_hashes > 30) {
4329                         vmolr |= E1000_VMOLR_MPME;
4330                 } else if (vf_data->num_vf_mc_hashes) {
4331                         int j;
4332                         vmolr |= E1000_VMOLR_ROMPE;
4333                         for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
4334                                 igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
4335                 }
4336         }
4337
4338         wr32(E1000_VMOLR(vf), vmolr);
4339
4340         /* there are flags left unprocessed, likely not supported */
4341         if (*msgbuf & E1000_VT_MSGINFO_MASK)
4342                 return -EINVAL;
4343
4344         return 0;
4345
4346 }
4347
4348 static int igb_set_vf_multicasts(struct igb_adapter *adapter,
4349                                   u32 *msgbuf, u32 vf)
4350 {
4351         int n = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
4352         u16 *hash_list = (u16 *)&msgbuf[1];
4353         struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4354         int i;
4355
4356         /* salt away the number of multicast addresses assigned
4357          * to this VF for later use to restore when the PF multi cast
4358          * list changes
4359          */
4360         vf_data->num_vf_mc_hashes = n;
4361
4362         /* only up to 30 hash values supported */
4363         if (n > 30)
4364                 n = 30;
4365
4366         /* store the hashes for later use */
4367         for (i = 0; i < n; i++)
4368                 vf_data->vf_mc_hashes[i] = hash_list[i];
4369
4370         /* Flush and reset the mta with the new values */
4371         igb_set_rx_mode(adapter->netdev);
4372
4373         return 0;
4374 }
4375
4376 static void igb_restore_vf_multicasts(struct igb_adapter *adapter)
4377 {
4378         struct e1000_hw *hw = &adapter->hw;
4379         struct vf_data_storage *vf_data;
4380         int i, j;
4381
4382         for (i = 0; i < adapter->vfs_allocated_count; i++) {
4383                 u32 vmolr = rd32(E1000_VMOLR(i));
4384                 vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
4385
4386                 vf_data = &adapter->vf_data[i];
4387
4388                 if ((vf_data->num_vf_mc_hashes > 30) ||
4389                     (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) {
4390                         vmolr |= E1000_VMOLR_MPME;
4391                 } else if (vf_data->num_vf_mc_hashes) {
4392                         vmolr |= E1000_VMOLR_ROMPE;
4393                         for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
4394                                 igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
4395                 }
4396                 wr32(E1000_VMOLR(i), vmolr);
4397         }
4398 }
4399
4400 static void igb_clear_vf_vfta(struct igb_adapter *adapter, u32 vf)
4401 {
4402         struct e1000_hw *hw = &adapter->hw;
4403         u32 pool_mask, reg, vid;
4404         int i;
4405
4406         pool_mask = 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
4407
4408         /* Find the vlan filter for this id */
4409         for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
4410                 reg = rd32(E1000_VLVF(i));
4411
4412                 /* remove the vf from the pool */
4413                 reg &= ~pool_mask;
4414
4415                 /* if pool is empty then remove entry from vfta */
4416                 if (!(reg & E1000_VLVF_POOLSEL_MASK) &&
4417                     (reg & E1000_VLVF_VLANID_ENABLE)) {
4418                         reg = 0;
4419                         vid = reg & E1000_VLVF_VLANID_MASK;
4420                         igb_vfta_set(hw, vid, false);
4421                 }
4422
4423                 wr32(E1000_VLVF(i), reg);
4424         }
4425
4426         adapter->vf_data[vf].vlans_enabled = 0;
4427 }
4428
4429 static s32 igb_vlvf_set(struct igb_adapter *adapter, u32 vid, bool add, u32 vf)
4430 {
4431         struct e1000_hw *hw = &adapter->hw;
4432         u32 reg, i;
4433
4434         /* The vlvf table only exists on 82576 hardware and newer */
4435         if (hw->mac.type < e1000_82576)
4436                 return -1;
4437
4438         /* we only need to do this if VMDq is enabled */
4439         if (!adapter->vfs_allocated_count)
4440                 return -1;
4441
4442         /* Find the vlan filter for this id */
4443         for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
4444                 reg = rd32(E1000_VLVF(i));
4445                 if ((reg & E1000_VLVF_VLANID_ENABLE) &&
4446                     vid == (reg & E1000_VLVF_VLANID_MASK))
4447                         break;
4448         }
4449
4450         if (add) {
4451                 if (i == E1000_VLVF_ARRAY_SIZE) {
4452                         /* Did not find a matching VLAN ID entry that was
4453                          * enabled.  Search for a free filter entry, i.e.
4454                          * one without the enable bit set
4455                          */
4456                         for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
4457                                 reg = rd32(E1000_VLVF(i));
4458                                 if (!(reg & E1000_VLVF_VLANID_ENABLE))
4459                                         break;
4460                         }
4461                 }
4462                 if (i < E1000_VLVF_ARRAY_SIZE) {
4463                         /* Found an enabled/available entry */
4464                         reg |= 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
4465
4466                         /* if !enabled we need to set this up in vfta */
4467                         if (!(reg & E1000_VLVF_VLANID_ENABLE)) {
4468                                 /* add VID to filter table */
4469                                 igb_vfta_set(hw, vid, true);
4470                                 reg |= E1000_VLVF_VLANID_ENABLE;
4471                         }
4472                         reg &= ~E1000_VLVF_VLANID_MASK;
4473                         reg |= vid;
4474                         wr32(E1000_VLVF(i), reg);
4475
4476                         /* do not modify RLPML for PF devices */
4477                         if (vf >= adapter->vfs_allocated_count)
4478                                 return 0;
4479
4480                         if (!adapter->vf_data[vf].vlans_enabled) {
4481                                 u32 size;
4482                                 reg = rd32(E1000_VMOLR(vf));
4483                                 size = reg & E1000_VMOLR_RLPML_MASK;
4484                                 size += 4;
4485                                 reg &= ~E1000_VMOLR_RLPML_MASK;
4486                                 reg |= size;
4487                                 wr32(E1000_VMOLR(vf), reg);
4488                         }
4489
4490                         adapter->vf_data[vf].vlans_enabled++;
4491                         return 0;
4492                 }
4493         } else {
4494                 if (i < E1000_VLVF_ARRAY_SIZE) {
4495                         /* remove vf from the pool */
4496                         reg &= ~(1 << (E1000_VLVF_POOLSEL_SHIFT + vf));
4497                         /* if pool is empty then remove entry from vfta */
4498                         if (!(reg & E1000_VLVF_POOLSEL_MASK)) {
4499                                 reg = 0;
4500                                 igb_vfta_set(hw, vid, false);
4501                         }
4502                         wr32(E1000_VLVF(i), reg);
4503
4504                         /* do not modify RLPML for PF devices */
4505                         if (vf >= adapter->vfs_allocated_count)
4506                                 return 0;
4507
4508                         adapter->vf_data[vf].vlans_enabled--;
4509                         if (!adapter->vf_data[vf].vlans_enabled) {
4510                                 u32 size;
4511                                 reg = rd32(E1000_VMOLR(vf));
4512                                 size = reg & E1000_VMOLR_RLPML_MASK;
4513                                 size -= 4;
4514                                 reg &= ~E1000_VMOLR_RLPML_MASK;
4515                                 reg |= size;
4516                                 wr32(E1000_VMOLR(vf), reg);
4517                         }
4518                 }
4519         }
4520         return 0;
4521 }
4522
4523 static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf)
4524 {
4525         struct e1000_hw *hw = &adapter->hw;
4526
4527         if (vid)
4528                 wr32(E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT));
4529         else
4530                 wr32(E1000_VMVIR(vf), 0);
4531 }
4532
4533 static int igb_ndo_set_vf_vlan(struct net_device *netdev,
4534                                int vf, u16 vlan, u8 qos)
4535 {
4536         int err = 0;
4537         struct igb_adapter *adapter = netdev_priv(netdev);
4538
4539         if ((vf >= adapter->vfs_allocated_count) || (vlan > 4095) || (qos > 7))
4540                 return -EINVAL;
4541         if (vlan || qos) {
4542                 err = igb_vlvf_set(adapter, vlan, !!vlan, vf);
4543                 if (err)
4544                         goto out;
4545                 igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
4546                 igb_set_vmolr(adapter, vf, !vlan);
4547                 adapter->vf_data[vf].pf_vlan = vlan;
4548                 adapter->vf_data[vf].pf_qos = qos;
4549                 dev_info(&adapter->pdev->dev,
4550                          "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
4551                 if (test_bit(__IGB_DOWN, &adapter->state)) {
4552                         dev_warn(&adapter->pdev->dev,
4553                                  "The VF VLAN has been set,"
4554                                  " but the PF device is not up.\n");
4555                         dev_warn(&adapter->pdev->dev,
4556                                  "Bring the PF device up before"
4557                                  " attempting to use the VF device.\n");
4558                 }
4559         } else {
4560                 igb_vlvf_set(adapter, adapter->vf_data[vf].pf_vlan,
4561                                    false, vf);
4562                 igb_set_vmvir(adapter, vlan, vf);
4563                 igb_set_vmolr(adapter, vf, true);
4564                 adapter->vf_data[vf].pf_vlan = 0;
4565                 adapter->vf_data[vf].pf_qos = 0;
4566        }
4567 out:
4568        return err;
4569 }
4570
4571 static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
4572 {
4573         int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
4574         int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK);
4575
4576         return igb_vlvf_set(adapter, vid, add, vf);
4577 }
4578
4579 static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
4580 {
4581         /* clear flags */
4582         adapter->vf_data[vf].flags &= ~(IGB_VF_FLAG_PF_SET_MAC);
4583         adapter->vf_data[vf].last_nack = jiffies;
4584
4585         /* reset offloads to defaults */
4586         igb_set_vmolr(adapter, vf, true);
4587
4588         /* reset vlans for device */
4589         igb_clear_vf_vfta(adapter, vf);
4590         if (adapter->vf_data[vf].pf_vlan)
4591                 igb_ndo_set_vf_vlan(adapter->netdev, vf,
4592                                     adapter->vf_data[vf].pf_vlan,
4593                                     adapter->vf_data[vf].pf_qos);
4594         else
4595                 igb_clear_vf_vfta(adapter, vf);
4596
4597         /* reset multicast table array for vf */
4598         adapter->vf_data[vf].num_vf_mc_hashes = 0;
4599
4600         /* Flush and reset the mta with the new values */
4601         igb_set_rx_mode(adapter->netdev);
4602 }
4603
4604 static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf)
4605 {
4606         unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
4607
4608         /* generate a new mac address as we were hotplug removed/added */
4609         if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC))
4610                 random_ether_addr(vf_mac);
4611
4612         /* process remaining reset events */
4613         igb_vf_reset(adapter, vf);
4614 }
4615
4616 static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf)
4617 {
4618         struct e1000_hw *hw = &adapter->hw;
4619         unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
4620         int rar_entry = hw->mac.rar_entry_count - (vf + 1);
4621         u32 reg, msgbuf[3];
4622         u8 *addr = (u8 *)(&msgbuf[1]);
4623
4624         /* process all the same items cleared in a function level reset */
4625         igb_vf_reset(adapter, vf);
4626
4627         /* set vf mac address */
4628         igb_rar_set_qsel(adapter, vf_mac, rar_entry, vf);
4629
4630         /* enable transmit and receive for vf */
4631         reg = rd32(E1000_VFTE);
4632         wr32(E1000_VFTE, reg | (1 << vf));
4633         reg = rd32(E1000_VFRE);
4634         wr32(E1000_VFRE, reg | (1 << vf));
4635
4636         adapter->vf_data[vf].flags = IGB_VF_FLAG_CTS;
4637
4638         /* reply to reset with ack and vf mac address */
4639         msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK;
4640         memcpy(addr, vf_mac, 6);
4641         igb_write_mbx(hw, msgbuf, 3, vf);
4642 }
4643
4644 static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf)
4645 {
4646         unsigned char *addr = (char *)&msg[1];
4647         int err = -1;
4648
4649         if (is_valid_ether_addr(addr))
4650                 err = igb_set_vf_mac(adapter, vf, addr);
4651
4652         return err;
4653 }
4654
4655 static void igb_rcv_ack_from_vf(struct igb_adapter *adapter, u32 vf)
4656 {
4657         struct e1000_hw *hw = &adapter->hw;
4658         struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4659         u32 msg = E1000_VT_MSGTYPE_NACK;
4660
4661         /* if device isn't clear to send it shouldn't be reading either */
4662         if (!(vf_data->flags & IGB_VF_FLAG_CTS) &&
4663             time_after(jiffies, vf_data->last_nack + (2 * HZ))) {
4664                 igb_write_mbx(hw, &msg, 1, vf);
4665                 vf_data->last_nack = jiffies;
4666         }
4667 }
4668
4669 static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
4670 {
4671         struct pci_dev *pdev = adapter->pdev;
4672         u32 msgbuf[E1000_VFMAILBOX_SIZE];
4673         struct e1000_hw *hw = &adapter->hw;
4674         struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4675         s32 retval;
4676
4677         retval = igb_read_mbx(hw, msgbuf, E1000_VFMAILBOX_SIZE, vf);
4678
4679         if (retval) {
4680                 /* if receive failed revoke VF CTS stats and restart init */
4681                 dev_err(&pdev->dev, "Error receiving message from VF\n");
4682                 vf_data->flags &= ~IGB_VF_FLAG_CTS;
4683                 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ)))
4684                         return;
4685                 goto out;
4686         }
4687
4688         /* this is a message we already processed, do nothing */
4689         if (msgbuf[0] & (E1000_VT_MSGTYPE_ACK | E1000_VT_MSGTYPE_NACK))
4690                 return;
4691
4692         /*
4693          * until the vf completes a reset it should not be
4694          * allowed to start any configuration.
4695          */
4696
4697         if (msgbuf[0] == E1000_VF_RESET) {
4698                 igb_vf_reset_msg(adapter, vf);
4699                 return;
4700         }
4701
4702         if (!(vf_data->flags & IGB_VF_FLAG_CTS)) {
4703                 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ)))
4704                         return;
4705                 retval = -1;
4706                 goto out;
4707         }
4708
4709         switch ((msgbuf[0] & 0xFFFF)) {
4710         case E1000_VF_SET_MAC_ADDR:
4711                 retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
4712                 break;
4713         case E1000_VF_SET_PROMISC:
4714                 retval = igb_set_vf_promisc(adapter, msgbuf, vf);
4715                 break;
4716         case E1000_VF_SET_MULTICAST:
4717                 retval = igb_set_vf_multicasts(adapter, msgbuf, vf);
4718                 break;
4719         case E1000_VF_SET_LPE:
4720                 retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf);
4721                 break;
4722         case E1000_VF_SET_VLAN:
4723                 if (adapter->vf_data[vf].pf_vlan)
4724                         retval = -1;
4725                 else
4726                         retval = igb_set_vf_vlan(adapter, msgbuf, vf);
4727                 break;
4728         default:
4729                 dev_err(&pdev->dev, "Unhandled Msg %08x\n", msgbuf[0]);
4730                 retval = -1;
4731                 break;
4732         }
4733
4734         msgbuf[0] |= E1000_VT_MSGTYPE_CTS;
4735 out:
4736         /* notify the VF of the results of what it sent us */
4737         if (retval)
4738                 msgbuf[0] |= E1000_VT_MSGTYPE_NACK;
4739         else
4740                 msgbuf[0] |= E1000_VT_MSGTYPE_ACK;
4741
4742         igb_write_mbx(hw, msgbuf, 1, vf);
4743 }
4744
4745 static void igb_msg_task(struct igb_adapter *adapter)
4746 {
4747         struct e1000_hw *hw = &adapter->hw;
4748         u32 vf;
4749
4750         for (vf = 0; vf < adapter->vfs_allocated_count; vf++) {
4751                 /* process any reset requests */
4752                 if (!igb_check_for_rst(hw, vf))
4753                         igb_vf_reset_event(adapter, vf);
4754
4755                 /* process any messages pending */
4756                 if (!igb_check_for_msg(hw, vf))
4757                         igb_rcv_msg_from_vf(adapter, vf);
4758
4759                 /* process any acks */
4760                 if (!igb_check_for_ack(hw, vf))
4761                         igb_rcv_ack_from_vf(adapter, vf);
4762         }
4763 }
4764
4765 /**
4766  *  igb_set_uta - Set unicast filter table address
4767  *  @adapter: board private structure
4768  *
4769  *  The unicast table address is a register array of 32-bit registers.
4770  *  The table is meant to be used in a way similar to how the MTA is used
4771  *  however due to certain limitations in the hardware it is necessary to
4772  *  set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscous
4773  *  enable bit to allow vlan tag stripping when promiscous mode is enabled
4774  **/
4775 static void igb_set_uta(struct igb_adapter *adapter)
4776 {
4777         struct e1000_hw *hw = &adapter->hw;
4778         int i;
4779
4780         /* The UTA table only exists on 82576 hardware and newer */
4781         if (hw->mac.type < e1000_82576)
4782                 return;
4783
4784         /* we only need to do this if VMDq is enabled */
4785         if (!adapter->vfs_allocated_count)
4786                 return;
4787
4788         for (i = 0; i < hw->mac.uta_reg_count; i++)
4789                 array_wr32(E1000_UTA, i, ~0);
4790 }
4791
4792 /**
4793  * igb_intr_msi - Interrupt Handler
4794  * @irq: interrupt number
4795  * @data: pointer to a network interface device structure
4796  **/
4797 static irqreturn_t igb_intr_msi(int irq, void *data)
4798 {
4799         struct igb_adapter *adapter = data;
4800         struct igb_q_vector *q_vector = adapter->q_vector[0];
4801         struct e1000_hw *hw = &adapter->hw;
4802         /* read ICR disables interrupts using IAM */
4803         u32 icr = rd32(E1000_ICR);
4804
4805         igb_write_itr(q_vector);
4806
4807         if (icr & E1000_ICR_DRSTA)
4808                 schedule_work(&adapter->reset_task);
4809
4810         if (icr & E1000_ICR_DOUTSYNC) {
4811                 /* HW is reporting DMA is out of sync */
4812                 adapter->stats.doosync++;
4813         }
4814
4815         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
4816                 hw->mac.get_link_status = 1;
4817                 if (!test_bit(__IGB_DOWN, &adapter->state))
4818                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
4819         }
4820
4821         napi_schedule(&q_vector->napi);
4822
4823         return IRQ_HANDLED;
4824 }
4825
4826 /**
4827  * igb_intr - Legacy Interrupt Handler
4828  * @irq: interrupt number
4829  * @data: pointer to a network interface device structure
4830  **/
4831 static irqreturn_t igb_intr(int irq, void *data)
4832 {
4833         struct igb_adapter *adapter = data;
4834         struct igb_q_vector *q_vector = adapter->q_vector[0];
4835         struct e1000_hw *hw = &adapter->hw;
4836         /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked.  No
4837          * need for the IMC write */
4838         u32 icr = rd32(E1000_ICR);
4839         if (!icr)
4840                 return IRQ_NONE;  /* Not our interrupt */
4841
4842         igb_write_itr(q_vector);
4843
4844         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
4845          * not set, then the adapter didn't send an interrupt */
4846         if (!(icr & E1000_ICR_INT_ASSERTED))
4847                 return IRQ_NONE;
4848
4849         if (icr & E1000_ICR_DRSTA)
4850                 schedule_work(&adapter->reset_task);
4851
4852         if (icr & E1000_ICR_DOUTSYNC) {
4853                 /* HW is reporting DMA is out of sync */
4854                 adapter->stats.doosync++;
4855         }
4856
4857         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
4858                 hw->mac.get_link_status = 1;
4859                 /* guard against interrupt when we're going down */
4860                 if (!test_bit(__IGB_DOWN, &adapter->state))
4861                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
4862         }
4863
4864         napi_schedule(&q_vector->napi);
4865
4866         return IRQ_HANDLED;
4867 }
4868
4869 static inline void igb_ring_irq_enable(struct igb_q_vector *q_vector)
4870 {
4871         struct igb_adapter *adapter = q_vector->adapter;
4872         struct e1000_hw *hw = &adapter->hw;
4873
4874         if ((q_vector->rx_ring && (adapter->rx_itr_setting & 3)) ||
4875             (!q_vector->rx_ring && (adapter->tx_itr_setting & 3))) {
4876                 if (!adapter->msix_entries)
4877                         igb_set_itr(adapter);
4878                 else
4879                         igb_update_ring_itr(q_vector);
4880         }
4881
4882         if (!test_bit(__IGB_DOWN, &adapter->state)) {
4883                 if (adapter->msix_entries)
4884                         wr32(E1000_EIMS, q_vector->eims_value);
4885                 else
4886                         igb_irq_enable(adapter);
4887         }
4888 }
4889
4890 /**
4891  * igb_poll - NAPI Rx polling callback
4892  * @napi: napi polling structure
4893  * @budget: count of how many packets we should handle
4894  **/
4895 static int igb_poll(struct napi_struct *napi, int budget)
4896 {
4897         struct igb_q_vector *q_vector = container_of(napi,
4898                                                      struct igb_q_vector,
4899                                                      napi);
4900         int tx_clean_complete = 1, work_done = 0;
4901
4902 #ifdef CONFIG_IGB_DCA
4903         if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED)
4904                 igb_update_dca(q_vector);
4905 #endif
4906         if (q_vector->tx_ring)
4907                 tx_clean_complete = igb_clean_tx_irq(q_vector);
4908
4909         if (q_vector->rx_ring)
4910                 igb_clean_rx_irq_adv(q_vector, &work_done, budget);
4911
4912         if (!tx_clean_complete)
4913                 work_done = budget;
4914
4915         /* If not enough Rx work done, exit the polling mode */
4916         if (work_done < budget) {
4917                 napi_complete(napi);
4918                 igb_ring_irq_enable(q_vector);
4919         }
4920
4921         return work_done;
4922 }
4923
4924 /**
4925  * igb_systim_to_hwtstamp - convert system time value to hw timestamp
4926  * @adapter: board private structure
4927  * @shhwtstamps: timestamp structure to update
4928  * @regval: unsigned 64bit system time value.
4929  *
4930  * We need to convert the system time value stored in the RX/TXSTMP registers
4931  * into a hwtstamp which can be used by the upper level timestamping functions
4932  */
4933 static void igb_systim_to_hwtstamp(struct igb_adapter *adapter,
4934                                    struct skb_shared_hwtstamps *shhwtstamps,
4935                                    u64 regval)
4936 {
4937         u64 ns;
4938
4939         /*
4940          * The 82580 starts with 1ns at bit 0 in RX/TXSTMPL, shift this up to
4941          * 24 to match clock shift we setup earlier.
4942          */
4943         if (adapter->hw.mac.type == e1000_82580)
4944                 regval <<= IGB_82580_TSYNC_SHIFT;
4945
4946         ns = timecounter_cyc2time(&adapter->clock, regval);
4947         timecompare_update(&adapter->compare, ns);
4948         memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
4949         shhwtstamps->hwtstamp = ns_to_ktime(ns);
4950         shhwtstamps->syststamp = timecompare_transform(&adapter->compare, ns);
4951 }
4952
4953 /**
4954  * igb_tx_hwtstamp - utility function which checks for TX time stamp
4955  * @q_vector: pointer to q_vector containing needed info
4956  * @skb: packet that was just sent
4957  *
4958  * If we were asked to do hardware stamping and such a time stamp is
4959  * available, then it must have been for this skb here because we only
4960  * allow only one such packet into the queue.
4961  */
4962 static void igb_tx_hwtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb)
4963 {
4964         struct igb_adapter *adapter = q_vector->adapter;
4965         union skb_shared_tx *shtx = skb_tx(skb);
4966         struct e1000_hw *hw = &adapter->hw;
4967         struct skb_shared_hwtstamps shhwtstamps;
4968         u64 regval;
4969
4970         /* if skb does not support hw timestamp or TX stamp not valid exit */
4971         if (likely(!shtx->hardware) ||
4972             !(rd32(E1000_TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID))
4973                 return;
4974
4975         regval = rd32(E1000_TXSTMPL);
4976         regval |= (u64)rd32(E1000_TXSTMPH) << 32;
4977
4978         igb_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
4979         skb_tstamp_tx(skb, &shhwtstamps);
4980 }
4981
4982 /**
4983  * igb_clean_tx_irq - Reclaim resources after transmit completes
4984  * @q_vector: pointer to q_vector containing needed info
4985  * returns true if ring is completely cleaned
4986  **/
4987 static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
4988 {
4989         struct igb_adapter *adapter = q_vector->adapter;
4990         struct igb_ring *tx_ring = q_vector->tx_ring;
4991         struct net_device *netdev = tx_ring->netdev;
4992         struct e1000_hw *hw = &adapter->hw;
4993         struct igb_buffer *buffer_info;
4994         struct sk_buff *skb;
4995         union e1000_adv_tx_desc *tx_desc, *eop_desc;
4996         unsigned int total_bytes = 0, total_packets = 0;
4997         unsigned int i, eop, count = 0;
4998         bool cleaned = false;
4999
5000         i = tx_ring->next_to_clean;
5001         eop = tx_ring->buffer_info[i].next_to_watch;
5002         eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
5003
5004         while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
5005                (count < tx_ring->count)) {
5006                 for (cleaned = false; !cleaned; count++) {
5007                         tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
5008                         buffer_info = &tx_ring->buffer_info[i];
5009                         cleaned = (i == eop);
5010                         skb = buffer_info->skb;
5011
5012                         if (skb) {
5013                                 unsigned int segs, bytecount;
5014                                 /* gso_segs is currently only valid for tcp */
5015                                 segs = buffer_info->gso_segs;
5016                                 /* multiply data chunks by size of headers */
5017                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
5018                                             skb->len;
5019                                 total_packets += segs;
5020                                 total_bytes += bytecount;
5021
5022                                 igb_tx_hwtstamp(q_vector, skb);
5023                         }
5024
5025                         igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
5026                         tx_desc->wb.status = 0;
5027
5028                         i++;
5029                         if (i == tx_ring->count)
5030                                 i = 0;
5031                 }
5032                 eop = tx_ring->buffer_info[i].next_to_watch;
5033                 eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
5034         }
5035
5036         tx_ring->next_to_clean = i;
5037
5038         if (unlikely(count &&
5039                      netif_carrier_ok(netdev) &&
5040                      igb_desc_unused(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
5041                 /* Make sure that anybody stopping the queue after this
5042                  * sees the new next_to_clean.
5043                  */
5044                 smp_mb();
5045                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
5046                     !(test_bit(__IGB_DOWN, &adapter->state))) {
5047                         netif_wake_subqueue(netdev, tx_ring->queue_index);
5048                         tx_ring->tx_stats.restart_queue++;
5049                 }
5050         }
5051
5052         if (tx_ring->detect_tx_hung) {
5053                 /* Detect a transmit hang in hardware, this serializes the
5054                  * check with the clearing of time_stamp and movement of i */
5055                 tx_ring->detect_tx_hung = false;
5056                 if (tx_ring->buffer_info[i].time_stamp &&
5057                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
5058                                (adapter->tx_timeout_factor * HZ)) &&
5059                     !(rd32(E1000_STATUS) & E1000_STATUS_TXOFF)) {
5060
5061                         /* detected Tx unit hang */
5062                         dev_err(&tx_ring->pdev->dev,
5063                                 "Detected Tx Unit Hang\n"
5064                                 "  Tx Queue             <%d>\n"
5065                                 "  TDH                  <%x>\n"
5066                                 "  TDT                  <%x>\n"
5067                                 "  next_to_use          <%x>\n"
5068                                 "  next_to_clean        <%x>\n"
5069                                 "buffer_info[next_to_clean]\n"
5070                                 "  time_stamp           <%lx>\n"
5071                                 "  next_to_watch        <%x>\n"
5072                                 "  jiffies              <%lx>\n"
5073                                 "  desc.status          <%x>\n",
5074                                 tx_ring->queue_index,
5075                                 readl(tx_ring->head),
5076                                 readl(tx_ring->tail),
5077                                 tx_ring->next_to_use,
5078                                 tx_ring->next_to_clean,
5079                                 tx_ring->buffer_info[eop].time_stamp,
5080                                 eop,
5081                                 jiffies,
5082                                 eop_desc->wb.status);
5083                         netif_stop_subqueue(netdev, tx_ring->queue_index);
5084                 }
5085         }
5086         tx_ring->total_bytes += total_bytes;
5087         tx_ring->total_packets += total_packets;
5088         tx_ring->tx_stats.bytes += total_bytes;
5089         tx_ring->tx_stats.packets += total_packets;
5090         return (count < tx_ring->count);
5091 }
5092
5093 /**
5094  * igb_receive_skb - helper function to handle rx indications
5095  * @q_vector: structure containing interrupt and ring information
5096  * @skb: packet to send up
5097  * @vlan_tag: vlan tag for packet
5098  **/
5099 static void igb_receive_skb(struct igb_q_vector *q_vector,
5100                             struct sk_buff *skb,
5101                             u16 vlan_tag)
5102 {
5103         struct igb_adapter *adapter = q_vector->adapter;
5104
5105         if (vlan_tag && adapter->vlgrp)
5106                 vlan_gro_receive(&q_vector->napi, adapter->vlgrp,
5107                                  vlan_tag, skb);
5108         else
5109                 napi_gro_receive(&q_vector->napi, skb);
5110 }
5111
5112 static inline void igb_rx_checksum_adv(struct igb_ring *ring,
5113                                        u32 status_err, struct sk_buff *skb)
5114 {
5115         skb->ip_summed = CHECKSUM_NONE;
5116
5117         /* Ignore Checksum bit is set or checksum is disabled through ethtool */
5118         if (!(ring->flags & IGB_RING_FLAG_RX_CSUM) ||
5119              (status_err & E1000_RXD_STAT_IXSM))
5120                 return;
5121
5122         /* TCP/UDP checksum error bit is set */
5123         if (status_err &
5124             (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
5125                 /*
5126                  * work around errata with sctp packets where the TCPE aka
5127                  * L4E bit is set incorrectly on 64 byte (60 byte w/o crc)
5128                  * packets, (aka let the stack check the crc32c)
5129                  */
5130                 if ((skb->len == 60) &&
5131                     (ring->flags & IGB_RING_FLAG_RX_SCTP_CSUM))
5132                         ring->rx_stats.csum_err++;
5133
5134                 /* let the stack verify checksum errors */
5135                 return;
5136         }
5137         /* It must be a TCP or UDP packet with a valid checksum */
5138         if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
5139                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5140
5141         dev_dbg(&ring->pdev->dev, "cksum success: bits %08X\n", status_err);
5142 }
5143
5144 static inline void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
5145                                    struct sk_buff *skb)
5146 {
5147         struct igb_adapter *adapter = q_vector->adapter;
5148         struct e1000_hw *hw = &adapter->hw;
5149         u64 regval;
5150
5151         /*
5152          * If this bit is set, then the RX registers contain the time stamp. No
5153          * other packet will be time stamped until we read these registers, so
5154          * read the registers to make them available again. Because only one
5155          * packet can be time stamped at a time, we know that the register
5156          * values must belong to this one here and therefore we don't need to
5157          * compare any of the additional attributes stored for it.
5158          *
5159          * If nothing went wrong, then it should have a skb_shared_tx that we
5160          * can turn into a skb_shared_hwtstamps.
5161          */
5162         if (likely(!(staterr & E1000_RXDADV_STAT_TS)))
5163                 return;
5164         if (!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
5165                 return;
5166
5167         regval = rd32(E1000_RXSTMPL);
5168         regval |= (u64)rd32(E1000_RXSTMPH) << 32;
5169
5170         igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
5171 }
5172 static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
5173                                union e1000_adv_rx_desc *rx_desc)
5174 {
5175         /* HW will not DMA in data larger than the given buffer, even if it
5176          * parses the (NFS, of course) header to be larger.  In that case, it
5177          * fills the header buffer and spills the rest into the page.
5178          */
5179         u16 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) &
5180                    E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
5181         if (hlen > rx_ring->rx_buffer_len)
5182                 hlen = rx_ring->rx_buffer_len;
5183         return hlen;
5184 }
5185
5186 static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
5187                                  int *work_done, int budget)
5188 {
5189         struct igb_ring *rx_ring = q_vector->rx_ring;
5190         struct net_device *netdev = rx_ring->netdev;
5191         struct pci_dev *pdev = rx_ring->pdev;
5192         union e1000_adv_rx_desc *rx_desc , *next_rxd;
5193         struct igb_buffer *buffer_info , *next_buffer;
5194         struct sk_buff *skb;
5195         bool cleaned = false;
5196         int cleaned_count = 0;
5197         int current_node = numa_node_id();
5198         unsigned int total_bytes = 0, total_packets = 0;
5199         unsigned int i;
5200         u32 staterr;
5201         u16 length;
5202         u16 vlan_tag;
5203
5204         i = rx_ring->next_to_clean;
5205         buffer_info = &rx_ring->buffer_info[i];
5206         rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
5207         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
5208
5209         while (staterr & E1000_RXD_STAT_DD) {
5210                 if (*work_done >= budget)
5211                         break;
5212                 (*work_done)++;
5213
5214                 skb = buffer_info->skb;
5215                 prefetch(skb->data - NET_IP_ALIGN);
5216                 buffer_info->skb = NULL;
5217
5218                 i++;
5219                 if (i == rx_ring->count)
5220                         i = 0;
5221
5222                 next_rxd = E1000_RX_DESC_ADV(*rx_ring, i);
5223                 prefetch(next_rxd);
5224                 next_buffer = &rx_ring->buffer_info[i];
5225
5226                 length = le16_to_cpu(rx_desc->wb.upper.length);
5227                 cleaned = true;
5228                 cleaned_count++;
5229
5230                 if (buffer_info->dma) {
5231                         pci_unmap_single(pdev, buffer_info->dma,
5232                                          rx_ring->rx_buffer_len,
5233                                          PCI_DMA_FROMDEVICE);
5234                         buffer_info->dma = 0;
5235                         if (rx_ring->rx_buffer_len >= IGB_RXBUFFER_1024) {
5236                                 skb_put(skb, length);
5237                                 goto send_up;
5238                         }
5239                         skb_put(skb, igb_get_hlen(rx_ring, rx_desc));
5240                 }
5241
5242                 if (length) {
5243                         pci_unmap_page(pdev, buffer_info->page_dma,
5244                                        PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
5245                         buffer_info->page_dma = 0;
5246
5247                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++,
5248                                                 buffer_info->page,
5249                                                 buffer_info->page_offset,
5250                                                 length);
5251
5252                         if ((page_count(buffer_info->page) != 1) ||
5253                             (page_to_nid(buffer_info->page) != current_node))
5254                                 buffer_info->page = NULL;
5255                         else
5256                                 get_page(buffer_info->page);
5257
5258                         skb->len += length;
5259                         skb->data_len += length;
5260                         skb->truesize += length;
5261                 }
5262
5263                 if (!(staterr & E1000_RXD_STAT_EOP)) {
5264                         buffer_info->skb = next_buffer->skb;
5265                         buffer_info->dma = next_buffer->dma;
5266                         next_buffer->skb = skb;
5267                         next_buffer->dma = 0;
5268                         goto next_desc;
5269                 }
5270 send_up:
5271                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
5272                         dev_kfree_skb_irq(skb);
5273                         goto next_desc;
5274                 }
5275
5276                 igb_rx_hwtstamp(q_vector, staterr, skb);
5277                 total_bytes += skb->len;
5278                 total_packets++;
5279
5280                 igb_rx_checksum_adv(rx_ring, staterr, skb);
5281
5282                 skb->protocol = eth_type_trans(skb, netdev);
5283                 skb_record_rx_queue(skb, rx_ring->queue_index);
5284
5285                 vlan_tag = ((staterr & E1000_RXD_STAT_VP) ?
5286                             le16_to_cpu(rx_desc->wb.upper.vlan) : 0);
5287
5288                 igb_receive_skb(q_vector, skb, vlan_tag);
5289
5290 next_desc:
5291                 rx_desc->wb.upper.status_error = 0;
5292
5293                 /* return some buffers to hardware, one at a time is too slow */
5294                 if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
5295                         igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
5296                         cleaned_count = 0;
5297                 }
5298
5299                 /* use prefetched values */
5300                 rx_desc = next_rxd;
5301                 buffer_info = next_buffer;
5302                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
5303         }
5304
5305         rx_ring->next_to_clean = i;
5306         cleaned_count = igb_desc_unused(rx_ring);
5307
5308         if (cleaned_count)
5309                 igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
5310
5311         rx_ring->total_packets += total_packets;
5312         rx_ring->total_bytes += total_bytes;
5313         rx_ring->rx_stats.packets += total_packets;
5314         rx_ring->rx_stats.bytes += total_bytes;
5315         return cleaned;
5316 }
5317
5318 /**
5319  * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
5320  * @adapter: address of board private structure
5321  **/
5322 void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring, int cleaned_count)
5323 {
5324         struct net_device *netdev = rx_ring->netdev;
5325         union e1000_adv_rx_desc *rx_desc;
5326         struct igb_buffer *buffer_info;
5327         struct sk_buff *skb;
5328         unsigned int i;
5329         int bufsz;
5330
5331         i = rx_ring->next_to_use;
5332         buffer_info = &rx_ring->buffer_info[i];
5333
5334         bufsz = rx_ring->rx_buffer_len;
5335
5336         while (cleaned_count--) {
5337                 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
5338
5339                 if ((bufsz < IGB_RXBUFFER_1024) && !buffer_info->page_dma) {
5340                         if (!buffer_info->page) {
5341                                 buffer_info->page = netdev_alloc_page(netdev);
5342                                 if (!buffer_info->page) {
5343                                         rx_ring->rx_stats.alloc_failed++;
5344                                         goto no_buffers;
5345                                 }
5346                                 buffer_info->page_offset = 0;
5347                         } else {
5348                                 buffer_info->page_offset ^= PAGE_SIZE / 2;
5349                         }
5350                         buffer_info->page_dma =
5351                                 pci_map_page(rx_ring->pdev, buffer_info->page,
5352                                              buffer_info->page_offset,
5353                                              PAGE_SIZE / 2,
5354                                              PCI_DMA_FROMDEVICE);
5355                         if (pci_dma_mapping_error(rx_ring->pdev,
5356                                                   buffer_info->page_dma)) {
5357                                 buffer_info->page_dma = 0;
5358                                 rx_ring->rx_stats.alloc_failed++;
5359                                 goto no_buffers;
5360                         }
5361                 }
5362
5363                 skb = buffer_info->skb;
5364                 if (!skb) {
5365                         skb = netdev_alloc_skb_ip_align(netdev, bufsz);
5366                         if (!skb) {
5367                                 rx_ring->rx_stats.alloc_failed++;
5368                                 goto no_buffers;
5369                         }
5370
5371                         buffer_info->skb = skb;
5372                 }
5373                 if (!buffer_info->dma) {
5374                         buffer_info->dma = pci_map_single(rx_ring->pdev,
5375                                                           skb->data,
5376                                                           bufsz,
5377                                                           PCI_DMA_FROMDEVICE);
5378                         if (pci_dma_mapping_error(rx_ring->pdev,
5379                                                   buffer_info->dma)) {
5380                                 buffer_info->dma = 0;
5381                                 rx_ring->rx_stats.alloc_failed++;
5382                                 goto no_buffers;
5383                         }
5384                 }
5385                 /* Refresh the desc even if buffer_addrs didn't change because
5386                  * each write-back erases this info. */
5387                 if (bufsz < IGB_RXBUFFER_1024) {
5388                         rx_desc->read.pkt_addr =
5389                              cpu_to_le64(buffer_info->page_dma);
5390                         rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
5391                 } else {
5392                         rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
5393                         rx_desc->read.hdr_addr = 0;
5394                 }
5395
5396                 i++;
5397                 if (i == rx_ring->count)
5398                         i = 0;
5399                 buffer_info = &rx_ring->buffer_info[i];
5400         }
5401
5402 no_buffers:
5403         if (rx_ring->next_to_use != i) {
5404                 rx_ring->next_to_use = i;
5405                 if (i == 0)
5406                         i = (rx_ring->count - 1);
5407                 else
5408                         i--;
5409
5410                 /* Force memory writes to complete before letting h/w
5411                  * know there are new descriptors to fetch.  (Only
5412                  * applicable for weak-ordered memory model archs,
5413                  * such as IA-64). */
5414                 wmb();
5415                 writel(i, rx_ring->tail);
5416         }
5417 }
5418
5419 /**
5420  * igb_mii_ioctl -
5421  * @netdev:
5422  * @ifreq:
5423  * @cmd:
5424  **/
5425 static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5426 {
5427         struct igb_adapter *adapter = netdev_priv(netdev);
5428         struct mii_ioctl_data *data = if_mii(ifr);
5429
5430         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5431                 return -EOPNOTSUPP;
5432
5433         switch (cmd) {
5434         case SIOCGMIIPHY:
5435                 data->phy_id = adapter->hw.phy.addr;
5436                 break;
5437         case SIOCGMIIREG:
5438                 if (igb_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
5439                                      &data->val_out))
5440                         return -EIO;
5441                 break;
5442         case SIOCSMIIREG:
5443         default:
5444                 return -EOPNOTSUPP;
5445         }
5446         return 0;
5447 }
5448
5449 /**
5450  * igb_hwtstamp_ioctl - control hardware time stamping
5451  * @netdev:
5452  * @ifreq:
5453  * @cmd:
5454  *
5455  * Outgoing time stamping can be enabled and disabled. Play nice and
5456  * disable it when requested, although it shouldn't case any overhead
5457  * when no packet needs it. At most one packet in the queue may be
5458  * marked for time stamping, otherwise it would be impossible to tell
5459  * for sure to which packet the hardware time stamp belongs.
5460  *
5461  * Incoming time stamping has to be configured via the hardware
5462  * filters. Not all combinations are supported, in particular event
5463  * type has to be specified. Matching the kind of event packet is
5464  * not supported, with the exception of "all V2 events regardless of
5465  * level 2 or 4".
5466  *
5467  **/
5468 static int igb_hwtstamp_ioctl(struct net_device *netdev,
5469                               struct ifreq *ifr, int cmd)
5470 {
5471         struct igb_adapter *adapter = netdev_priv(netdev);
5472         struct e1000_hw *hw = &adapter->hw;
5473         struct hwtstamp_config config;
5474         u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
5475         u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
5476         u32 tsync_rx_cfg = 0;
5477         bool is_l4 = false;
5478         bool is_l2 = false;
5479         u32 regval;
5480
5481         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5482                 return -EFAULT;
5483
5484         /* reserved for future extensions */
5485         if (config.flags)
5486                 return -EINVAL;
5487
5488         switch (config.tx_type) {
5489         case HWTSTAMP_TX_OFF:
5490                 tsync_tx_ctl = 0;
5491         case HWTSTAMP_TX_ON:
5492                 break;
5493         default:
5494                 return -ERANGE;
5495         }
5496
5497         switch (config.rx_filter) {
5498         case HWTSTAMP_FILTER_NONE:
5499                 tsync_rx_ctl = 0;
5500                 break;
5501         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
5502         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
5503         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
5504         case HWTSTAMP_FILTER_ALL:
5505                 /*
5506                  * register TSYNCRXCFG must be set, therefore it is not
5507                  * possible to time stamp both Sync and Delay_Req messages
5508                  * => fall back to time stamping all packets
5509                  */
5510                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
5511                 config.rx_filter = HWTSTAMP_FILTER_ALL;
5512                 break;
5513         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
5514                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
5515                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE;
5516                 is_l4 = true;
5517                 break;
5518         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
5519                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
5520                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE;
5521                 is_l4 = true;
5522                 break;
5523         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
5524         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
5525                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
5526                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE;
5527                 is_l2 = true;
5528                 is_l4 = true;
5529                 config.rx_filter = HWTSTAMP_FILTER_SOME;
5530                 break;
5531         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
5532         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
5533                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
5534                 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE;
5535                 is_l2 = true;
5536                 is_l4 = true;
5537                 config.rx_filter = HWTSTAMP_FILTER_SOME;
5538                 break;
5539         case HWTSTAMP_FILTER_PTP_V2_EVENT:
5540         case HWTSTAMP_FILTER_PTP_V2_SYNC:
5541         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
5542                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
5543                 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
5544                 is_l2 = true;
5545                 break;
5546         default:
5547                 return -ERANGE;
5548         }
5549
5550         if (hw->mac.type == e1000_82575) {
5551                 if (tsync_rx_ctl | tsync_tx_ctl)
5552                         return -EINVAL;
5553                 return 0;
5554         }
5555
5556         /* enable/disable TX */
5557         regval = rd32(E1000_TSYNCTXCTL);
5558         regval &= ~E1000_TSYNCTXCTL_ENABLED;
5559         regval |= tsync_tx_ctl;
5560         wr32(E1000_TSYNCTXCTL, regval);
5561
5562         /* enable/disable RX */
5563         regval = rd32(E1000_TSYNCRXCTL);
5564         regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
5565         regval |= tsync_rx_ctl;
5566         wr32(E1000_TSYNCRXCTL, regval);
5567
5568         /* define which PTP packets are time stamped */
5569         wr32(E1000_TSYNCRXCFG, tsync_rx_cfg);
5570
5571         /* define ethertype filter for timestamped packets */
5572         if (is_l2)
5573                 wr32(E1000_ETQF(3),
5574                                 (E1000_ETQF_FILTER_ENABLE | /* enable filter */
5575                                  E1000_ETQF_1588 | /* enable timestamping */
5576                                  ETH_P_1588));     /* 1588 eth protocol type */
5577         else
5578                 wr32(E1000_ETQF(3), 0);
5579
5580 #define PTP_PORT 319
5581         /* L4 Queue Filter[3]: filter by destination port and protocol */
5582         if (is_l4) {
5583                 u32 ftqf = (IPPROTO_UDP /* UDP */
5584                         | E1000_FTQF_VF_BP /* VF not compared */
5585                         | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */
5586                         | E1000_FTQF_MASK); /* mask all inputs */
5587                 ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */
5588
5589                 wr32(E1000_IMIR(3), htons(PTP_PORT));
5590                 wr32(E1000_IMIREXT(3),
5591                      (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP));
5592                 if (hw->mac.type == e1000_82576) {
5593                         /* enable source port check */
5594                         wr32(E1000_SPQF(3), htons(PTP_PORT));
5595                         ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP;
5596                 }
5597                 wr32(E1000_FTQF(3), ftqf);
5598         } else {
5599                 wr32(E1000_FTQF(3), E1000_FTQF_MASK);
5600         }
5601         wrfl();
5602
5603         adapter->hwtstamp_config = config;
5604
5605         /* clear TX/RX time stamp registers, just to be sure */
5606         regval = rd32(E1000_TXSTMPH);
5607         regval = rd32(E1000_RXSTMPH);
5608
5609         return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
5610                 -EFAULT : 0;
5611 }
5612
5613 /**
5614  * igb_ioctl -
5615  * @netdev:
5616  * @ifreq:
5617  * @cmd:
5618  **/
5619 static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5620 {
5621         switch (cmd) {
5622         case SIOCGMIIPHY:
5623         case SIOCGMIIREG:
5624         case SIOCSMIIREG:
5625                 return igb_mii_ioctl(netdev, ifr, cmd);
5626         case SIOCSHWTSTAMP:
5627                 return igb_hwtstamp_ioctl(netdev, ifr, cmd);
5628         default:
5629                 return -EOPNOTSUPP;
5630         }
5631 }
5632
5633 s32 igb_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
5634 {
5635         struct igb_adapter *adapter = hw->back;
5636         u16 cap_offset;
5637
5638         cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
5639         if (!cap_offset)
5640                 return -E1000_ERR_CONFIG;
5641
5642         pci_read_config_word(adapter->pdev, cap_offset + reg, value);
5643
5644         return 0;
5645 }
5646
5647 s32 igb_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
5648 {
5649         struct igb_adapter *adapter = hw->back;
5650         u16 cap_offset;
5651
5652         cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
5653         if (!cap_offset)
5654                 return -E1000_ERR_CONFIG;
5655
5656         pci_write_config_word(adapter->pdev, cap_offset + reg, *value);
5657
5658         return 0;
5659 }
5660
5661 static void igb_vlan_rx_register(struct net_device *netdev,
5662                                  struct vlan_group *grp)
5663 {
5664         struct igb_adapter *adapter = netdev_priv(netdev);
5665         struct e1000_hw *hw = &adapter->hw;
5666         u32 ctrl, rctl;
5667
5668         igb_irq_disable(adapter);
5669         adapter->vlgrp = grp;
5670
5671         if (grp) {
5672                 /* enable VLAN tag insert/strip */
5673                 ctrl = rd32(E1000_CTRL);
5674                 ctrl |= E1000_CTRL_VME;
5675                 wr32(E1000_CTRL, ctrl);
5676
5677                 /* Disable CFI check */
5678                 rctl = rd32(E1000_RCTL);
5679                 rctl &= ~E1000_RCTL_CFIEN;
5680                 wr32(E1000_RCTL, rctl);
5681         } else {
5682                 /* disable VLAN tag insert/strip */
5683                 ctrl = rd32(E1000_CTRL);
5684                 ctrl &= ~E1000_CTRL_VME;
5685                 wr32(E1000_CTRL, ctrl);
5686         }
5687
5688         igb_rlpml_set(adapter);
5689
5690         if (!test_bit(__IGB_DOWN, &adapter->state))
5691                 igb_irq_enable(adapter);
5692 }
5693
5694 static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
5695 {
5696         struct igb_adapter *adapter = netdev_priv(netdev);
5697         struct e1000_hw *hw = &adapter->hw;
5698         int pf_id = adapter->vfs_allocated_count;
5699
5700         /* attempt to add filter to vlvf array */
5701         igb_vlvf_set(adapter, vid, true, pf_id);
5702
5703         /* add the filter since PF can receive vlans w/o entry in vlvf */
5704         igb_vfta_set(hw, vid, true);
5705 }
5706
5707 static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
5708 {
5709         struct igb_adapter *adapter = netdev_priv(netdev);
5710         struct e1000_hw *hw = &adapter->hw;
5711         int pf_id = adapter->vfs_allocated_count;
5712         s32 err;
5713
5714         igb_irq_disable(adapter);
5715         vlan_group_set_device(adapter->vlgrp, vid, NULL);
5716
5717         if (!test_bit(__IGB_DOWN, &adapter->state))
5718                 igb_irq_enable(adapter);
5719
5720         /* remove vlan from VLVF table array */
5721         err = igb_vlvf_set(adapter, vid, false, pf_id);
5722
5723         /* if vid was not present in VLVF just remove it from table */
5724         if (err)
5725                 igb_vfta_set(hw, vid, false);
5726 }
5727
5728 static void igb_restore_vlan(struct igb_adapter *adapter)
5729 {
5730         igb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
5731
5732         if (adapter->vlgrp) {
5733                 u16 vid;
5734                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
5735                         if (!vlan_group_get_device(adapter->vlgrp, vid))
5736                                 continue;
5737                         igb_vlan_rx_add_vid(adapter->netdev, vid);
5738                 }
5739         }
5740 }
5741
5742 int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx)
5743 {
5744         struct pci_dev *pdev = adapter->pdev;
5745         struct e1000_mac_info *mac = &adapter->hw.mac;
5746
5747         mac->autoneg = 0;
5748
5749         switch (spddplx) {
5750         case SPEED_10 + DUPLEX_HALF:
5751                 mac->forced_speed_duplex = ADVERTISE_10_HALF;
5752                 break;
5753         case SPEED_10 + DUPLEX_FULL:
5754                 mac->forced_speed_duplex = ADVERTISE_10_FULL;
5755                 break;
5756         case SPEED_100 + DUPLEX_HALF:
5757                 mac->forced_speed_duplex = ADVERTISE_100_HALF;
5758                 break;
5759         case SPEED_100 + DUPLEX_FULL:
5760                 mac->forced_speed_duplex = ADVERTISE_100_FULL;
5761                 break;
5762         case SPEED_1000 + DUPLEX_FULL:
5763                 mac->autoneg = 1;
5764                 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
5765                 break;
5766         case SPEED_1000 + DUPLEX_HALF: /* not supported */
5767         default:
5768                 dev_err(&pdev->dev, "Unsupported Speed/Duplex configuration\n");
5769                 return -EINVAL;
5770         }
5771         return 0;
5772 }
5773
5774 static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake)
5775 {
5776         struct net_device *netdev = pci_get_drvdata(pdev);
5777         struct igb_adapter *adapter = netdev_priv(netdev);
5778         struct e1000_hw *hw = &adapter->hw;
5779         u32 ctrl, rctl, status;
5780         u32 wufc = adapter->wol;
5781 #ifdef CONFIG_PM
5782         int retval = 0;
5783 #endif
5784
5785         netif_device_detach(netdev);
5786
5787         if (netif_running(netdev))
5788                 igb_close(netdev);
5789
5790         igb_clear_interrupt_scheme(adapter);
5791
5792 #ifdef CONFIG_PM
5793         retval = pci_save_state(pdev);
5794         if (retval)
5795                 return retval;
5796 #endif
5797
5798         status = rd32(E1000_STATUS);
5799         if (status & E1000_STATUS_LU)
5800                 wufc &= ~E1000_WUFC_LNKC;
5801
5802         if (wufc) {
5803                 igb_setup_rctl(adapter);
5804                 igb_set_rx_mode(netdev);
5805
5806                 /* turn on all-multi mode if wake on multicast is enabled */
5807                 if (wufc & E1000_WUFC_MC) {
5808                         rctl = rd32(E1000_RCTL);
5809                         rctl |= E1000_RCTL_MPE;
5810                         wr32(E1000_RCTL, rctl);
5811                 }
5812
5813                 ctrl = rd32(E1000_CTRL);
5814                 /* advertise wake from D3Cold */
5815                 #define E1000_CTRL_ADVD3WUC 0x00100000
5816                 /* phy power management enable */
5817                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5818                 ctrl |= E1000_CTRL_ADVD3WUC;
5819                 wr32(E1000_CTRL, ctrl);
5820
5821                 /* Allow time for pending master requests to run */
5822                 igb_disable_pcie_master(hw);
5823
5824                 wr32(E1000_WUC, E1000_WUC_PME_EN);
5825                 wr32(E1000_WUFC, wufc);
5826         } else {
5827                 wr32(E1000_WUC, 0);
5828                 wr32(E1000_WUFC, 0);
5829         }
5830
5831         *enable_wake = wufc || adapter->en_mng_pt;
5832         if (!*enable_wake)
5833                 igb_power_down_link(adapter);
5834         else
5835                 igb_power_up_link(adapter);
5836
5837         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5838          * would have already happened in close and is redundant. */
5839         igb_release_hw_control(adapter);
5840
5841         pci_disable_device(pdev);
5842
5843         return 0;
5844 }
5845
5846 #ifdef CONFIG_PM
5847 static int igb_suspend(struct pci_dev *pdev, pm_message_t state)
5848 {
5849         int retval;
5850         bool wake;
5851
5852         retval = __igb_shutdown(pdev, &wake);
5853         if (retval)
5854                 return retval;
5855
5856         if (wake) {
5857                 pci_prepare_to_sleep(pdev);
5858         } else {
5859                 pci_wake_from_d3(pdev, false);
5860                 pci_set_power_state(pdev, PCI_D3hot);
5861         }
5862
5863         return 0;
5864 }
5865
5866 static int igb_resume(struct pci_dev *pdev)
5867 {
5868         struct net_device *netdev = pci_get_drvdata(pdev);
5869         struct igb_adapter *adapter = netdev_priv(netdev);
5870         struct e1000_hw *hw = &adapter->hw;
5871         u32 err;
5872
5873         pci_set_power_state(pdev, PCI_D0);
5874         pci_restore_state(pdev);
5875         pci_save_state(pdev);
5876
5877         err = pci_enable_device_mem(pdev);
5878         if (err) {
5879                 dev_err(&pdev->dev,
5880                         "igb: Cannot enable PCI device from suspend\n");
5881                 return err;
5882         }
5883         pci_set_master(pdev);
5884
5885         pci_enable_wake(pdev, PCI_D3hot, 0);
5886         pci_enable_wake(pdev, PCI_D3cold, 0);
5887
5888         if (igb_init_interrupt_scheme(adapter)) {
5889                 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
5890                 return -ENOMEM;
5891         }
5892
5893         igb_reset(adapter);
5894
5895         /* let the f/w know that the h/w is now under the control of the
5896          * driver. */
5897         igb_get_hw_control(adapter);
5898
5899         wr32(E1000_WUS, ~0);
5900
5901         if (netif_running(netdev)) {
5902                 err = igb_open(netdev);
5903                 if (err)
5904                         return err;
5905         }
5906
5907         netif_device_attach(netdev);
5908
5909         return 0;
5910 }
5911 #endif
5912
5913 static void igb_shutdown(struct pci_dev *pdev)
5914 {
5915         bool wake;
5916
5917         __igb_shutdown(pdev, &wake);
5918
5919         if (system_state == SYSTEM_POWER_OFF) {
5920                 pci_wake_from_d3(pdev, wake);
5921                 pci_set_power_state(pdev, PCI_D3hot);
5922         }
5923 }
5924
5925 #ifdef CONFIG_NET_POLL_CONTROLLER
5926 /*
5927  * Polling 'interrupt' - used by things like netconsole to send skbs
5928  * without having to re-enable interrupts. It's not called while
5929  * the interrupt routine is executing.
5930  */
5931 static void igb_netpoll(struct net_device *netdev)
5932 {
5933         struct igb_adapter *adapter = netdev_priv(netdev);
5934         struct e1000_hw *hw = &adapter->hw;
5935         int i;
5936
5937         if (!adapter->msix_entries) {
5938                 struct igb_q_vector *q_vector = adapter->q_vector[0];
5939                 igb_irq_disable(adapter);
5940                 napi_schedule(&q_vector->napi);
5941                 return;
5942         }
5943
5944         for (i = 0; i < adapter->num_q_vectors; i++) {
5945                 struct igb_q_vector *q_vector = adapter->q_vector[i];
5946                 wr32(E1000_EIMC, q_vector->eims_value);
5947                 napi_schedule(&q_vector->napi);
5948         }
5949 }
5950 #endif /* CONFIG_NET_POLL_CONTROLLER */
5951
5952 /**
5953  * igb_io_error_detected - called when PCI error is detected
5954  * @pdev: Pointer to PCI device
5955  * @state: The current pci connection state
5956  *
5957  * This function is called after a PCI bus error affecting
5958  * this device has been detected.
5959  */
5960 static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
5961                                               pci_channel_state_t state)
5962 {
5963         struct net_device *netdev = pci_get_drvdata(pdev);
5964         struct igb_adapter *adapter = netdev_priv(netdev);
5965
5966         netif_device_detach(netdev);
5967
5968         if (state == pci_channel_io_perm_failure)
5969                 return PCI_ERS_RESULT_DISCONNECT;
5970
5971         if (netif_running(netdev))
5972                 igb_down(adapter);
5973         pci_disable_device(pdev);
5974
5975         /* Request a slot slot reset. */
5976         return PCI_ERS_RESULT_NEED_RESET;
5977 }
5978
5979 /**
5980  * igb_io_slot_reset - called after the pci bus has been reset.
5981  * @pdev: Pointer to PCI device
5982  *
5983  * Restart the card from scratch, as if from a cold-boot. Implementation
5984  * resembles the first-half of the igb_resume routine.
5985  */
5986 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
5987 {
5988         struct net_device *netdev = pci_get_drvdata(pdev);
5989         struct igb_adapter *adapter = netdev_priv(netdev);
5990         struct e1000_hw *hw = &adapter->hw;
5991         pci_ers_result_t result;
5992         int err;
5993
5994         if (pci_enable_device_mem(pdev)) {
5995                 dev_err(&pdev->dev,
5996                         "Cannot re-enable PCI device after reset.\n");
5997                 result = PCI_ERS_RESULT_DISCONNECT;
5998         } else {
5999                 pci_set_master(pdev);
6000                 pci_restore_state(pdev);
6001                 pci_save_state(pdev);
6002
6003                 pci_enable_wake(pdev, PCI_D3hot, 0);
6004                 pci_enable_wake(pdev, PCI_D3cold, 0);
6005
6006                 igb_reset(adapter);
6007                 wr32(E1000_WUS, ~0);
6008                 result = PCI_ERS_RESULT_RECOVERED;
6009         }
6010
6011         err = pci_cleanup_aer_uncorrect_error_status(pdev);
6012         if (err) {
6013                 dev_err(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status "
6014                         "failed 0x%0x\n", err);
6015                 /* non-fatal, continue */
6016         }
6017
6018         return result;
6019 }
6020
6021 /**
6022  * igb_io_resume - called when traffic can start flowing again.
6023  * @pdev: Pointer to PCI device
6024  *
6025  * This callback is called when the error recovery driver tells us that
6026  * its OK to resume normal operation. Implementation resembles the
6027  * second-half of the igb_resume routine.
6028  */
6029 static void igb_io_resume(struct pci_dev *pdev)
6030 {
6031         struct net_device *netdev = pci_get_drvdata(pdev);
6032         struct igb_adapter *adapter = netdev_priv(netdev);
6033
6034         if (netif_running(netdev)) {
6035                 if (igb_up(adapter)) {
6036                         dev_err(&pdev->dev, "igb_up failed after reset\n");
6037                         return;
6038                 }
6039         }
6040
6041         netif_device_attach(netdev);
6042
6043         /* let the f/w know that the h/w is now under the control of the
6044          * driver. */
6045         igb_get_hw_control(adapter);
6046 }
6047
6048 static void igb_rar_set_qsel(struct igb_adapter *adapter, u8 *addr, u32 index,
6049                              u8 qsel)
6050 {
6051         u32 rar_low, rar_high;
6052         struct e1000_hw *hw = &adapter->hw;
6053
6054         /* HW expects these in little endian so we reverse the byte order
6055          * from network order (big endian) to little endian
6056          */
6057         rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
6058                   ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
6059         rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
6060
6061         /* Indicate to hardware the Address is Valid. */
6062         rar_high |= E1000_RAH_AV;
6063
6064         if (hw->mac.type == e1000_82575)
6065                 rar_high |= E1000_RAH_POOL_1 * qsel;
6066         else
6067                 rar_high |= E1000_RAH_POOL_1 << qsel;
6068
6069         wr32(E1000_RAL(index), rar_low);
6070         wrfl();
6071         wr32(E1000_RAH(index), rar_high);
6072         wrfl();
6073 }
6074
6075 static int igb_set_vf_mac(struct igb_adapter *adapter,
6076                           int vf, unsigned char *mac_addr)
6077 {
6078         struct e1000_hw *hw = &adapter->hw;
6079         /* VF MAC addresses start at end of receive addresses and moves
6080          * torwards the first, as a result a collision should not be possible */
6081         int rar_entry = hw->mac.rar_entry_count - (vf + 1);
6082
6083         memcpy(adapter->vf_data[vf].vf_mac_addresses, mac_addr, ETH_ALEN);
6084
6085         igb_rar_set_qsel(adapter, mac_addr, rar_entry, vf);
6086
6087         return 0;
6088 }
6089
6090 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
6091 {
6092         struct igb_adapter *adapter = netdev_priv(netdev);
6093         if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count))
6094                 return -EINVAL;
6095         adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
6096         dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
6097         dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
6098                                       " change effective.");
6099         if (test_bit(__IGB_DOWN, &adapter->state)) {
6100                 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
6101                          " but the PF device is not up.\n");
6102                 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
6103                          " attempting to use the VF device.\n");
6104         }
6105         return igb_set_vf_mac(adapter, vf, mac);
6106 }
6107
6108 static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
6109 {
6110         return -EOPNOTSUPP;
6111 }
6112
6113 static int igb_ndo_get_vf_config(struct net_device *netdev,
6114                                  int vf, struct ifla_vf_info *ivi)
6115 {
6116         struct igb_adapter *adapter = netdev_priv(netdev);
6117         if (vf >= adapter->vfs_allocated_count)
6118                 return -EINVAL;
6119         ivi->vf = vf;
6120         memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
6121         ivi->tx_rate = 0;
6122         ivi->vlan = adapter->vf_data[vf].pf_vlan;
6123         ivi->qos = adapter->vf_data[vf].pf_qos;
6124         return 0;
6125 }
6126
6127 static void igb_vmm_control(struct igb_adapter *adapter)
6128 {
6129         struct e1000_hw *hw = &adapter->hw;
6130         u32 reg;
6131
6132         /* replication is not supported for 82575 */
6133         if (hw->mac.type == e1000_82575)
6134                 return;
6135
6136         /* enable replication vlan tag stripping */
6137         reg = rd32(E1000_RPLOLR);
6138         reg |= E1000_RPLOLR_STRVLAN;
6139         wr32(E1000_RPLOLR, reg);
6140
6141         /* notify HW that the MAC is adding vlan tags */
6142         reg = rd32(E1000_DTXCTL);
6143         reg |= E1000_DTXCTL_VLAN_ADDED;
6144         wr32(E1000_DTXCTL, reg);
6145
6146         if (adapter->vfs_allocated_count) {
6147                 igb_vmdq_set_loopback_pf(hw, true);
6148                 igb_vmdq_set_replication_pf(hw, true);
6149         } else {
6150                 igb_vmdq_set_loopback_pf(hw, false);
6151                 igb_vmdq_set_replication_pf(hw, false);
6152         }
6153 }
6154
6155 /* igb_main.c */