root/drivers/net/ethernet/intel/fm10k/fm10k_pci.c

DEFINITIONS

1. fm10k_read_pci_cfg_word
2. fm10k_read_reg
3. fm10k_hw_ready
4. fm10k_macvlan_schedule
5. fm10k_stop_macvlan_task
6. fm10k_resume_macvlan_task
7. fm10k_service_event_schedule
8. fm10k_service_event_complete
9. fm10k_stop_service_event
10. fm10k_start_service_event
11. fm10k_service_timer
12. fm10k_prepare_for_reset
13. fm10k_handle_reset
14. fm10k_detach_subtask
15. fm10k_reset_subtask
16. fm10k_configure_swpri_map
17. fm10k_watchdog_update_host_state
18. fm10k_mbx_subtask
19. fm10k_watchdog_host_is_ready
20. fm10k_watchdog_host_not_ready
21. fm10k_update_stats
22. fm10k_watchdog_flush_tx
23. fm10k_watchdog_subtask
24. fm10k_check_hang_subtask
25. fm10k_service_task
26. fm10k_macvlan_task
27. fm10k_configure_tx_ring
28. fm10k_enable_tx_ring
29. fm10k_configure_tx
30. fm10k_configure_rx_ring
31. fm10k_update_rx_drop_en
32. fm10k_configure_dglort
33. fm10k_configure_rx
34. fm10k_napi_enable_all
35. fm10k_msix_clean_rings
36. fm10k_msix_mbx_vf
37. fm10k_handle_fault
38. fm10k_report_fault
39. fm10k_reset_drop_on_empty
40. fm10k_msix_mbx_pf
41. fm10k_mbx_free_irq
42. fm10k_mbx_mac_addr
43. fm10k_mbx_error
44. fm10k_mbx_request_irq_vf
45. fm10k_lport_map
46. fm10k_update_pvid
47. fm10k_mbx_request_irq_pf
48. fm10k_mbx_request_irq
49. fm10k_qv_free_irq
50. fm10k_qv_request_irq
51. fm10k_up
52. fm10k_napi_disable_all
53. fm10k_down
54. fm10k_sw_init
55. fm10k_probe
56. fm10k_remove
57. fm10k_prepare_suspend
58. fm10k_handle_resume
59. fm10k_resume
60. fm10k_suspend
61. fm10k_io_error_detected
62. fm10k_io_slot_reset
63. fm10k_io_resume
64. fm10k_io_reset_prepare
65. fm10k_io_reset_done
66. fm10k_register_pci_driver
67. fm10k_unregister_pci_driver

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2019 Intel Corporation. */
   3 
   4 #include <linux/module.h>
   5 #include <linux/interrupt.h>
   6 #include <linux/aer.h>
   7 
   8 #include "fm10k.h"
   9 
  10 static const struct fm10k_info *fm10k_info_tbl[] = {
  11         [fm10k_device_pf] = &fm10k_pf_info,
  12         [fm10k_device_vf] = &fm10k_vf_info,
  13 };
  14 
  15 /*
  16  * fm10k_pci_tbl - PCI Device ID Table
  17  *
  18  * Wildcard entries (PCI_ANY_ID) should come last
  19  * Last entry must be all 0s
  20  *
  21  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  22  *   Class, Class Mask, private data (not used) }
  23  */
  24 static const struct pci_device_id fm10k_pci_tbl[] = {
  25         { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
  26         { PCI_VDEVICE(INTEL, FM10K_DEV_ID_SDI_FM10420_QDA2), fm10k_device_pf },
  27         { PCI_VDEVICE(INTEL, FM10K_DEV_ID_SDI_FM10420_DA2), fm10k_device_pf },
  28         { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
  29         /* required last entry */
  30         { 0, }
  31 };
  32 MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
  33 
  34 u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
  35 {
  36         struct fm10k_intfc *interface = hw->back;
  37         u16 value = 0;
  38 
  39         if (FM10K_REMOVED(hw->hw_addr))
  40                 return ~value;
  41 
  42         pci_read_config_word(interface->pdev, reg, &value);
  43         if (value == 0xFFFF)
  44                 fm10k_write_flush(hw);
  45 
  46         return value;
  47 }
  48 
  49 u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
  50 {
  51         u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
  52         u32 value = 0;
  53 
  54         if (FM10K_REMOVED(hw_addr))
  55                 return ~value;
  56 
  57         value = readl(&hw_addr[reg]);
  58         if (!(~value) && (!reg || !(~readl(hw_addr)))) {
  59                 struct fm10k_intfc *interface = hw->back;
  60                 struct net_device *netdev = interface->netdev;
  61 
  62                 hw->hw_addr = NULL;
  63                 netif_device_detach(netdev);
  64                 netdev_err(netdev, "PCIe link lost, device now detached\n");
  65         }
  66 
  67         return value;
  68 }
  69 
  70 static int fm10k_hw_ready(struct fm10k_intfc *interface)
  71 {
  72         struct fm10k_hw *hw = &interface->hw;
  73 
  74         fm10k_write_flush(hw);
  75 
  76         return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
  77 }
  78 
  79 /**
  80  * fm10k_macvlan_schedule - Schedule MAC/VLAN queue task
  81  * @interface: fm10k private interface structure
  82  *
  83  * Schedule the MAC/VLAN queue monitor task. If the MAC/VLAN task cannot be
  84  * started immediately, request that it be restarted when possible.
  85  */
  86 void fm10k_macvlan_schedule(struct fm10k_intfc *interface)
  87 {
  88         /* Avoid processing the MAC/VLAN queue when the service task is
  89          * disabled, or when we're resetting the device.
  90          */
  91         if (!test_bit(__FM10K_MACVLAN_DISABLE, interface->state) &&
  92             !test_and_set_bit(__FM10K_MACVLAN_SCHED, interface->state)) {
  93                 clear_bit(__FM10K_MACVLAN_REQUEST, interface->state);
  94                 /* We delay the actual start of execution in order to allow
  95                  * multiple MAC/VLAN updates to accumulate before handling
  96                  * them, and to allow some time to let the mailbox drain
  97                  * between runs.
  98                  */
  99                 queue_delayed_work(fm10k_workqueue,
 100                                    &interface->macvlan_task, 10);
 101         } else {
 102                 set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
 103         }
 104 }
 105 
 106 /**
 107  * fm10k_stop_macvlan_task - Stop the MAC/VLAN queue monitor
 108  * @interface: fm10k private interface structure
 109  *
 110  * Wait until the MAC/VLAN queue task has stopped, and cancel any future
 111  * requests.
 112  */
 113 static void fm10k_stop_macvlan_task(struct fm10k_intfc *interface)
 114 {
 115         /* Disable the MAC/VLAN work item */
 116         set_bit(__FM10K_MACVLAN_DISABLE, interface->state);
 117 
 118         /* Make sure we waited until any current invocations have stopped */
 119         cancel_delayed_work_sync(&interface->macvlan_task);
 120 
 121         /* We set the __FM10K_MACVLAN_SCHED bit when we schedule the task.
 122          * However, it may not be unset of the MAC/VLAN task never actually
 123          * got a chance to run. Since we've canceled the task here, and it
 124          * cannot be rescheuled right now, we need to ensure the scheduled bit
 125          * gets unset.
 126          */
 127         clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
 128 }
 129 
 130 /**
 131  * fm10k_resume_macvlan_task - Restart the MAC/VLAN queue monitor
 132  * @interface: fm10k private interface structure
 133  *
 134  * Clear the __FM10K_MACVLAN_DISABLE bit and, if a request occurred, schedule
 135  * the MAC/VLAN work monitor.
 136  */
 137 static void fm10k_resume_macvlan_task(struct fm10k_intfc *interface)
 138 {
 139         /* Re-enable the MAC/VLAN work item */
 140         clear_bit(__FM10K_MACVLAN_DISABLE, interface->state);
 141 
 142         /* We might have received a MAC/VLAN request while disabled. If so,
 143          * kick off the queue now.
 144          */
 145         if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
 146                 fm10k_macvlan_schedule(interface);
 147 }
 148 
 149 void fm10k_service_event_schedule(struct fm10k_intfc *interface)
 150 {
 151         if (!test_bit(__FM10K_SERVICE_DISABLE, interface->state) &&
 152             !test_and_set_bit(__FM10K_SERVICE_SCHED, interface->state)) {
 153                 clear_bit(__FM10K_SERVICE_REQUEST, interface->state);
 154                 queue_work(fm10k_workqueue, &interface->service_task);
 155         } else {
 156                 set_bit(__FM10K_SERVICE_REQUEST, interface->state);
 157         }
 158 }
 159 
 160 static void fm10k_service_event_complete(struct fm10k_intfc *interface)
 161 {
 162         WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, interface->state));
 163 
 164         /* flush memory to make sure state is correct before next watchog */
 165         smp_mb__before_atomic();
 166         clear_bit(__FM10K_SERVICE_SCHED, interface->state);
 167 
 168         /* If a service event was requested since we started, immediately
 169          * re-schedule now. This ensures we don't drop a request until the
 170          * next timer event.
 171          */
 172         if (test_bit(__FM10K_SERVICE_REQUEST, interface->state))
 173                 fm10k_service_event_schedule(interface);
 174 }
 175 
 176 static void fm10k_stop_service_event(struct fm10k_intfc *interface)
 177 {
 178         set_bit(__FM10K_SERVICE_DISABLE, interface->state);
 179         cancel_work_sync(&interface->service_task);
 180 
 181         /* It's possible that cancel_work_sync stopped the service task from
 182          * running before it could actually start. In this case the
 183          * __FM10K_SERVICE_SCHED bit will never be cleared. Since we know that
 184          * the service task cannot be running at this point, we need to clear
 185          * the scheduled bit, as otherwise the service task may never be
 186          * restarted.
 187          */
 188         clear_bit(__FM10K_SERVICE_SCHED, interface->state);
 189 }
 190 
 191 static void fm10k_start_service_event(struct fm10k_intfc *interface)
 192 {
 193         clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
 194         fm10k_service_event_schedule(interface);
 195 }
 196 
 197 /**
 198  * fm10k_service_timer - Timer Call-back
 199  * @t: pointer to timer data
 200  **/
 201 static void fm10k_service_timer(struct timer_list *t)
 202 {
 203         struct fm10k_intfc *interface = from_timer(interface, t,
 204                                                    service_timer);
 205 
 206         /* Reset the timer */
 207         mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
 208 
 209         fm10k_service_event_schedule(interface);
 210 }
 211 
 212 /**
 213  * fm10k_prepare_for_reset - Prepare the driver and device for a pending reset
 214  * @interface: fm10k private data structure
 215  *
 216  * This function prepares for a device reset by shutting as much down as we
 217  * can. It does nothing and returns false if __FM10K_RESETTING was already set
 218  * prior to calling this function. It returns true if it actually did work.
 219  */
 220 static bool fm10k_prepare_for_reset(struct fm10k_intfc *interface)
 221 {
 222         struct net_device *netdev = interface->netdev;
 223 
 224         WARN_ON(in_interrupt());
 225 
 226         /* put off any impending NetWatchDogTimeout */
 227         netif_trans_update(netdev);
 228 
 229         /* Nothing to do if a reset is already in progress */
 230         if (test_and_set_bit(__FM10K_RESETTING, interface->state))
 231                 return false;
 232 
 233         /* As the MAC/VLAN task will be accessing registers it must not be
 234          * running while we reset. Although the task will not be scheduled
 235          * once we start resetting it may already be running
 236          */
 237         fm10k_stop_macvlan_task(interface);
 238 
 239         rtnl_lock();
 240 
 241         fm10k_iov_suspend(interface->pdev);
 242 
 243         if (netif_running(netdev))
 244                 fm10k_close(netdev);
 245 
 246         fm10k_mbx_free_irq(interface);
 247 
 248         /* free interrupts */
 249         fm10k_clear_queueing_scheme(interface);
 250 
 251         /* delay any future reset requests */
 252         interface->last_reset = jiffies + (10 * HZ);
 253 
 254         rtnl_unlock();
 255 
 256         return true;
 257 }
 258 
 259 static int fm10k_handle_reset(struct fm10k_intfc *interface)
 260 {
 261         struct net_device *netdev = interface->netdev;
 262         struct fm10k_hw *hw = &interface->hw;
 263         int err;
 264 
 265         WARN_ON(!test_bit(__FM10K_RESETTING, interface->state));
 266 
 267         rtnl_lock();
 268 
 269         pci_set_master(interface->pdev);
 270 
 271         /* reset and initialize the hardware so it is in a known state */
 272         err = hw->mac.ops.reset_hw(hw);
 273         if (err) {
 274                 dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
 275                 goto reinit_err;
 276         }
 277 
 278         err = hw->mac.ops.init_hw(hw);
 279         if (err) {
 280                 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
 281                 goto reinit_err;
 282         }
 283 
 284         err = fm10k_init_queueing_scheme(interface);
 285         if (err) {
 286                 dev_err(&interface->pdev->dev,
 287                         "init_queueing_scheme failed: %d\n", err);
 288                 goto reinit_err;
 289         }
 290 
 291         /* re-associate interrupts */
 292         err = fm10k_mbx_request_irq(interface);
 293         if (err)
 294                 goto err_mbx_irq;
 295 
 296         err = fm10k_hw_ready(interface);
 297         if (err)
 298                 goto err_open;
 299 
 300         /* update hardware address for VFs if perm_addr has changed */
 301         if (hw->mac.type == fm10k_mac_vf) {
 302                 if (is_valid_ether_addr(hw->mac.perm_addr)) {
 303                         ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
 304                         ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
 305                         ether_addr_copy(netdev->dev_addr, hw->mac.perm_addr);
 306                         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 307                 }
 308 
 309                 if (hw->mac.vlan_override)
 310                         netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
 311                 else
 312                         netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
 313         }
 314 
 315         err = netif_running(netdev) ? fm10k_open(netdev) : 0;
 316         if (err)
 317                 goto err_open;
 318 
 319         fm10k_iov_resume(interface->pdev);
 320 
 321         rtnl_unlock();
 322 
 323         fm10k_resume_macvlan_task(interface);
 324 
 325         clear_bit(__FM10K_RESETTING, interface->state);
 326 
 327         return err;
 328 err_open:
 329         fm10k_mbx_free_irq(interface);
 330 err_mbx_irq:
 331         fm10k_clear_queueing_scheme(interface);
 332 reinit_err:
 333         netif_device_detach(netdev);
 334 
 335         rtnl_unlock();
 336 
 337         clear_bit(__FM10K_RESETTING, interface->state);
 338 
 339         return err;
 340 }
 341 
 342 static void fm10k_detach_subtask(struct fm10k_intfc *interface)
 343 {
 344         struct net_device *netdev = interface->netdev;
 345         u32 __iomem *hw_addr;
 346         u32 value;
 347 
 348         /* do nothing if netdev is still present or hw_addr is set */
 349         if (netif_device_present(netdev) || interface->hw.hw_addr)
 350                 return;
 351 
 352         /* We've lost the PCIe register space, and can no longer access the
 353          * device. Shut everything except the detach subtask down and prepare
 354          * to reset the device in case we recover. If we actually prepare for
 355          * reset, indicate that we're detached.
 356          */
 357         if (fm10k_prepare_for_reset(interface))
 358                 set_bit(__FM10K_RESET_DETACHED, interface->state);
 359 
 360         /* check the real address space to see if we've recovered */
 361         hw_addr = READ_ONCE(interface->uc_addr);
 362         value = readl(hw_addr);
 363         if (~value) {
 364                 int err;
 365 
 366                 /* Make sure the reset was initiated because we detached,
 367                  * otherwise we might race with a different reset flow.
 368                  */
 369                 if (!test_and_clear_bit(__FM10K_RESET_DETACHED,
 370                                         interface->state))
 371                         return;
 372 
 373                 /* Restore the hardware address */
 374                 interface->hw.hw_addr = interface->uc_addr;
 375 
 376                 /* PCIe link has been restored, and the device is active
 377                  * again. Restore everything and reset the device.
 378                  */
 379                 err = fm10k_handle_reset(interface);
 380                 if (err) {
 381                         netdev_err(netdev, "Unable to reset device: %d\n", err);
 382                         interface->hw.hw_addr = NULL;
 383                         return;
 384                 }
 385 
 386                 /* Re-attach the netdev */
 387                 netif_device_attach(netdev);
 388                 netdev_warn(netdev, "PCIe link restored, device now attached\n");
 389                 return;
 390         }
 391 }
 392 
 393 static void fm10k_reset_subtask(struct fm10k_intfc *interface)
 394 {
 395         int err;
 396 
 397         if (!test_and_clear_bit(FM10K_FLAG_RESET_REQUESTED,
 398                                 interface->flags))
 399                 return;
 400 
 401         /* If another thread has already prepared to reset the device, we
 402          * should not attempt to handle a reset here, since we'd race with
 403          * that thread. This may happen if we suspend the device or if the
 404          * PCIe link is lost. In this case, we'll just ignore the RESET
 405          * request, as it will (eventually) be taken care of when the thread
 406          * which actually started the reset is finished.
 407          */
 408         if (!fm10k_prepare_for_reset(interface))
 409                 return;
 410 
 411         netdev_err(interface->netdev, "Reset interface\n");
 412 
 413         err = fm10k_handle_reset(interface);
 414         if (err)
 415                 dev_err(&interface->pdev->dev,
 416                         "fm10k_handle_reset failed: %d\n", err);
 417 }
 418 
 419 /**
 420  * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
 421  * @interface: board private structure
 422  *
 423  * Configure the SWPRI to PC mapping for the port.
 424  **/
 425 static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
 426 {
 427         struct net_device *netdev = interface->netdev;
 428         struct fm10k_hw *hw = &interface->hw;
 429         int i;
 430 
 431         /* clear flag indicating update is needed */
 432         clear_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
 433 
 434         /* these registers are only available on the PF */
 435         if (hw->mac.type != fm10k_mac_pf)
 436                 return;
 437 
 438         /* configure SWPRI to PC map */
 439         for (i = 0; i < FM10K_SWPRI_MAX; i++)
 440                 fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
 441                                 netdev_get_prio_tc_map(netdev, i));
 442 }
 443 
 444 /**
 445  * fm10k_watchdog_update_host_state - Update the link status based on host.
 446  * @interface: board private structure
 447  **/
 448 static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
 449 {
 450         struct fm10k_hw *hw = &interface->hw;
 451         s32 err;
 452 
 453         if (test_bit(__FM10K_LINK_DOWN, interface->state)) {
 454                 interface->host_ready = false;
 455                 if (time_is_after_jiffies(interface->link_down_event))
 456                         return;
 457                 clear_bit(__FM10K_LINK_DOWN, interface->state);
 458         }
 459 
 460         if (test_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags)) {
 461                 if (rtnl_trylock()) {
 462                         fm10k_configure_swpri_map(interface);
 463                         rtnl_unlock();
 464                 }
 465         }
 466 
 467         /* lock the mailbox for transmit and receive */
 468         fm10k_mbx_lock(interface);
 469 
 470         err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
 471         if (err && time_is_before_jiffies(interface->last_reset))
 472                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
 473 
 474         /* free the lock */
 475         fm10k_mbx_unlock(interface);
 476 }
 477 
 478 /**
 479  * fm10k_mbx_subtask - Process upstream and downstream mailboxes
 480  * @interface: board private structure
 481  *
 482  * This function will process both the upstream and downstream mailboxes.
 483  **/
 484 static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
 485 {
 486         /* If we're resetting, bail out */
 487         if (test_bit(__FM10K_RESETTING, interface->state))
 488                 return;
 489 
 490         /* process upstream mailbox and update device state */
 491         fm10k_watchdog_update_host_state(interface);
 492 
 493         /* process downstream mailboxes */
 494         fm10k_iov_mbx(interface);
 495 }
 496 
 497 /**
 498  * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
 499  * @interface: board private structure
 500  **/
 501 static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
 502 {
 503         struct net_device *netdev = interface->netdev;
 504 
 505         /* only continue if link state is currently down */
 506         if (netif_carrier_ok(netdev))
 507                 return;
 508 
 509         netif_info(interface, drv, netdev, "NIC Link is up\n");
 510 
 511         netif_carrier_on(netdev);
 512         netif_tx_wake_all_queues(netdev);
 513 }
 514 
 515 /**
 516  * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
 517  * @interface: board private structure
 518  **/
 519 static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
 520 {
 521         struct net_device *netdev = interface->netdev;
 522 
 523         /* only continue if link state is currently up */
 524         if (!netif_carrier_ok(netdev))
 525                 return;
 526 
 527         netif_info(interface, drv, netdev, "NIC Link is down\n");
 528 
 529         netif_carrier_off(netdev);
 530         netif_tx_stop_all_queues(netdev);
 531 }
 532 
 533 /**
 534  * fm10k_update_stats - Update the board statistics counters.
 535  * @interface: board private structure
 536  **/
 537 void fm10k_update_stats(struct fm10k_intfc *interface)
 538 {
 539         struct net_device_stats *net_stats = &interface->netdev->stats;
 540         struct fm10k_hw *hw = &interface->hw;
 541         u64 hw_csum_tx_good = 0, hw_csum_rx_good = 0, rx_length_errors = 0;
 542         u64 rx_switch_errors = 0, rx_drops = 0, rx_pp_errors = 0;
 543         u64 rx_link_errors = 0;
 544         u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
 545         u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
 546         u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
 547         u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
 548         u64 bytes, pkts;
 549         int i;
 550 
 551         /* ensure only one thread updates stats at a time */
 552         if (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
 553                 return;
 554 
 555         /* do not allow stats update via service task for next second */
 556         interface->next_stats_update = jiffies + HZ;
 557 
 558         /* gather some stats to the interface struct that are per queue */
 559         for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
 560                 struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]);
 561 
 562                 if (!tx_ring)
 563                         continue;
 564 
 565                 restart_queue += tx_ring->tx_stats.restart_queue;
 566                 tx_busy += tx_ring->tx_stats.tx_busy;
 567                 tx_csum_errors += tx_ring->tx_stats.csum_err;
 568                 bytes += tx_ring->stats.bytes;
 569                 pkts += tx_ring->stats.packets;
 570                 hw_csum_tx_good += tx_ring->tx_stats.csum_good;
 571         }
 572 
 573         interface->restart_queue = restart_queue;
 574         interface->tx_busy = tx_busy;
 575         net_stats->tx_bytes = bytes;
 576         net_stats->tx_packets = pkts;
 577         interface->tx_csum_errors = tx_csum_errors;
 578         interface->hw_csum_tx_good = hw_csum_tx_good;
 579 
 580         /* gather some stats to the interface struct that are per queue */
 581         for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
 582                 struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]);
 583 
 584                 if (!rx_ring)
 585                         continue;
 586 
 587                 bytes += rx_ring->stats.bytes;
 588                 pkts += rx_ring->stats.packets;
 589                 alloc_failed += rx_ring->rx_stats.alloc_failed;
 590                 rx_csum_errors += rx_ring->rx_stats.csum_err;
 591                 rx_errors += rx_ring->rx_stats.errors;
 592                 hw_csum_rx_good += rx_ring->rx_stats.csum_good;
 593                 rx_switch_errors += rx_ring->rx_stats.switch_errors;
 594                 rx_drops += rx_ring->rx_stats.drops;
 595                 rx_pp_errors += rx_ring->rx_stats.pp_errors;
 596                 rx_link_errors += rx_ring->rx_stats.link_errors;
 597                 rx_length_errors += rx_ring->rx_stats.length_errors;
 598         }
 599 
 600         net_stats->rx_bytes = bytes;
 601         net_stats->rx_packets = pkts;
 602         interface->alloc_failed = alloc_failed;
 603         interface->rx_csum_errors = rx_csum_errors;
 604         interface->hw_csum_rx_good = hw_csum_rx_good;
 605         interface->rx_switch_errors = rx_switch_errors;
 606         interface->rx_drops = rx_drops;
 607         interface->rx_pp_errors = rx_pp_errors;
 608         interface->rx_link_errors = rx_link_errors;
 609         interface->rx_length_errors = rx_length_errors;
 610 
 611         hw->mac.ops.update_hw_stats(hw, &interface->stats);
 612 
 613         for (i = 0; i < hw->mac.max_queues; i++) {
 614                 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
 615 
 616                 tx_bytes_nic += q->tx_bytes.count;
 617                 tx_pkts_nic += q->tx_packets.count;
 618                 rx_bytes_nic += q->rx_bytes.count;
 619                 rx_pkts_nic += q->rx_packets.count;
 620                 rx_drops_nic += q->rx_drops.count;
 621         }
 622 
 623         interface->tx_bytes_nic = tx_bytes_nic;
 624         interface->tx_packets_nic = tx_pkts_nic;
 625         interface->rx_bytes_nic = rx_bytes_nic;
 626         interface->rx_packets_nic = rx_pkts_nic;
 627         interface->rx_drops_nic = rx_drops_nic;
 628 
 629         /* Fill out the OS statistics structure */
 630         net_stats->rx_errors = rx_errors;
 631         net_stats->rx_dropped = interface->stats.nodesc_drop.count;
 632 
 633         clear_bit(__FM10K_UPDATING_STATS, interface->state);
 634 }
 635 
 636 /**
 637  * fm10k_watchdog_flush_tx - flush queues on host not ready
 638  * @interface: pointer to the device interface structure
 639  **/
 640 static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
 641 {
 642         int some_tx_pending = 0;
 643         int i;
 644 
 645         /* nothing to do if carrier is up */
 646         if (netif_carrier_ok(interface->netdev))
 647                 return;
 648 
 649         for (i = 0; i < interface->num_tx_queues; i++) {
 650                 struct fm10k_ring *tx_ring = interface->tx_ring[i];
 651 
 652                 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
 653                         some_tx_pending = 1;
 654                         break;
 655                 }
 656         }
 657 
 658         /* We've lost link, so the controller stops DMA, but we've got
 659          * queued Tx work that's never going to get done, so reset
 660          * controller to flush Tx.
 661          */
 662         if (some_tx_pending)
 663                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
 664 }
 665 
 666 /**
 667  * fm10k_watchdog_subtask - check and bring link up
 668  * @interface: pointer to the device interface structure
 669  **/
 670 static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
 671 {
 672         /* if interface is down do nothing */
 673         if (test_bit(__FM10K_DOWN, interface->state) ||
 674             test_bit(__FM10K_RESETTING, interface->state))
 675                 return;
 676 
 677         if (interface->host_ready)
 678                 fm10k_watchdog_host_is_ready(interface);
 679         else
 680                 fm10k_watchdog_host_not_ready(interface);
 681 
 682         /* update stats only once every second */
 683         if (time_is_before_jiffies(interface->next_stats_update))
 684                 fm10k_update_stats(interface);
 685 
 686         /* flush any uncompleted work */
 687         fm10k_watchdog_flush_tx(interface);
 688 }
 689 
 690 /**
 691  * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
 692  * @interface: pointer to the device interface structure
 693  *
 694  * This function serves two purposes.  First it strobes the interrupt lines
 695  * in order to make certain interrupts are occurring.  Secondly it sets the
 696  * bits needed to check for TX hangs.  As a result we should immediately
 697  * determine if a hang has occurred.
 698  */
 699 static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
 700 {
 701         /* If we're down or resetting, just bail */
 702         if (test_bit(__FM10K_DOWN, interface->state) ||
 703             test_bit(__FM10K_RESETTING, interface->state))
 704                 return;
 705 
 706         /* rate limit tx hang checks to only once every 2 seconds */
 707         if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
 708                 return;
 709         interface->next_tx_hang_check = jiffies + (2 * HZ);
 710 
 711         if (netif_carrier_ok(interface->netdev)) {
 712                 int i;
 713 
 714                 /* Force detection of hung controller */
 715                 for (i = 0; i < interface->num_tx_queues; i++)
 716                         set_check_for_tx_hang(interface->tx_ring[i]);
 717 
 718                 /* Rearm all in-use q_vectors for immediate firing */
 719                 for (i = 0; i < interface->num_q_vectors; i++) {
 720                         struct fm10k_q_vector *qv = interface->q_vector[i];
 721 
 722                         if (!qv->tx.count && !qv->rx.count)
 723                                 continue;
 724                         writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
 725                 }
 726         }
 727 }
 728 
 729 /**
 730  * fm10k_service_task - manages and runs subtasks
 731  * @work: pointer to work_struct containing our data
 732  **/
 733 static void fm10k_service_task(struct work_struct *work)
 734 {
 735         struct fm10k_intfc *interface;
 736 
 737         interface = container_of(work, struct fm10k_intfc, service_task);
 738 
 739         /* Check whether we're detached first */
 740         fm10k_detach_subtask(interface);
 741 
 742         /* tasks run even when interface is down */
 743         fm10k_mbx_subtask(interface);
 744         fm10k_reset_subtask(interface);
 745 
 746         /* tasks only run when interface is up */
 747         fm10k_watchdog_subtask(interface);
 748         fm10k_check_hang_subtask(interface);
 749 
 750         /* release lock on service events to allow scheduling next event */
 751         fm10k_service_event_complete(interface);
 752 }
 753 
 754 /**
 755  * fm10k_macvlan_task - send queued MAC/VLAN requests to switch manager
 756  * @work: pointer to work_struct containing our data
 757  *
 758  * This work item handles sending MAC/VLAN updates to the switch manager. When
 759  * the interface is up, it will attempt to queue mailbox messages to the
 760  * switch manager requesting updates for MAC/VLAN pairs. If the Tx fifo of the
 761  * mailbox is full, it will reschedule itself to try again in a short while.
 762  * This ensures that the driver does not overload the switch mailbox with too
 763  * many simultaneous requests, causing an unnecessary reset.
 764  **/
 765 static void fm10k_macvlan_task(struct work_struct *work)
 766 {
 767         struct fm10k_macvlan_request *item;
 768         struct fm10k_intfc *interface;
 769         struct delayed_work *dwork;
 770         struct list_head *requests;
 771         struct fm10k_hw *hw;
 772         unsigned long flags;
 773 
 774         dwork = to_delayed_work(work);
 775         interface = container_of(dwork, struct fm10k_intfc, macvlan_task);
 776         hw = &interface->hw;
 777         requests = &interface->macvlan_requests;
 778 
 779         do {
 780                 /* Pop the first item off the list */
 781                 spin_lock_irqsave(&interface->macvlan_lock, flags);
 782                 item = list_first_entry_or_null(requests,
 783                                                 struct fm10k_macvlan_request,
 784                                                 list);
 785                 if (item)
 786                         list_del_init(&item->list);
 787 
 788                 spin_unlock_irqrestore(&interface->macvlan_lock, flags);
 789 
 790                 /* We have no more items to process */
 791                 if (!item)
 792                         goto done;
 793 
 794                 fm10k_mbx_lock(interface);
 795 
 796                 /* Check that we have plenty of space to send the message. We
 797                  * want to ensure that the mailbox stays low enough to avoid a
 798                  * change in the host state, otherwise we may see spurious
 799                  * link up / link down notifications.
 800                  */
 801                 if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU + 5)) {
 802                         hw->mbx.ops.process(hw, &hw->mbx);
 803                         set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
 804                         fm10k_mbx_unlock(interface);
 805 
 806                         /* Put the request back on the list */
 807                         spin_lock_irqsave(&interface->macvlan_lock, flags);
 808                         list_add(&item->list, requests);
 809                         spin_unlock_irqrestore(&interface->macvlan_lock, flags);
 810                         break;
 811                 }
 812 
 813                 switch (item->type) {
 814                 case FM10K_MC_MAC_REQUEST:
 815                         hw->mac.ops.update_mc_addr(hw,
 816                                                    item->mac.glort,
 817                                                    item->mac.addr,
 818                                                    item->mac.vid,
 819                                                    item->set);
 820                         break;
 821                 case FM10K_UC_MAC_REQUEST:
 822                         hw->mac.ops.update_uc_addr(hw,
 823                                                    item->mac.glort,
 824                                                    item->mac.addr,
 825                                                    item->mac.vid,
 826                                                    item->set,
 827                                                    0);
 828                         break;
 829                 case FM10K_VLAN_REQUEST:
 830                         hw->mac.ops.update_vlan(hw,
 831                                                 item->vlan.vid,
 832                                                 item->vlan.vsi,
 833                                                 item->set);
 834                         break;
 835                 default:
 836                         break;
 837                 }
 838 
 839                 fm10k_mbx_unlock(interface);
 840 
 841                 /* Free the item now that we've sent the update */
 842                 kfree(item);
 843         } while (true);
 844 
 845 done:
 846         WARN_ON(!test_bit(__FM10K_MACVLAN_SCHED, interface->state));
 847 
 848         /* flush memory to make sure state is correct */
 849         smp_mb__before_atomic();
 850         clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
 851 
 852         /* If a MAC/VLAN request was scheduled since we started, we should
 853          * re-schedule. However, there is no reason to re-schedule if there is
 854          * no work to do.
 855          */
 856         if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
 857                 fm10k_macvlan_schedule(interface);
 858 }
 859 
 860 /**
 861  * fm10k_configure_tx_ring - Configure Tx ring after Reset
 862  * @interface: board private structure
 863  * @ring: structure containing ring specific data
 864  *
 865  * Configure the Tx descriptor ring after a reset.
 866  **/
 867 static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
 868                                     struct fm10k_ring *ring)
 869 {
 870         struct fm10k_hw *hw = &interface->hw;
 871         u64 tdba = ring->dma;
 872         u32 size = ring->count * sizeof(struct fm10k_tx_desc);
 873         u32 txint = FM10K_INT_MAP_DISABLE;
 874         u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE;
 875         u8 reg_idx = ring->reg_idx;
 876 
 877         /* disable queue to avoid issues while updating state */
 878         fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
 879         fm10k_write_flush(hw);
 880 
 881         /* possible poll here to verify ring resources have been cleaned */
 882 
 883         /* set location and size for descriptor ring */
 884         fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
 885         fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
 886         fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
 887 
 888         /* reset head and tail pointers */
 889         fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
 890         fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
 891 
 892         /* store tail pointer */
 893         ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
 894 
 895         /* reset ntu and ntc to place SW in sync with hardware */
 896         ring->next_to_clean = 0;
 897         ring->next_to_use = 0;
 898 
 899         /* Map interrupt */
 900         if (ring->q_vector) {
 901                 txint = ring->q_vector->v_idx + NON_Q_VECTORS;
 902                 txint |= FM10K_INT_MAP_TIMER0;
 903         }
 904 
 905         fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
 906 
 907         /* enable use of FTAG bit in Tx descriptor, register is RO for VF */
 908         fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
 909                         FM10K_PFVTCTL_FTAG_DESC_ENABLE);
 910 
 911         /* Initialize XPS */
 912         if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, ring->state) &&
 913             ring->q_vector)
 914                 netif_set_xps_queue(ring->netdev,
 915                                     &ring->q_vector->affinity_mask,
 916                                     ring->queue_index);
 917 
 918         /* enable queue */
 919         fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
 920 }
 921 
 922 /**
 923  * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
 924  * @interface: board private structure
 925  * @ring: structure containing ring specific data
 926  *
 927  * Verify the Tx descriptor ring is ready for transmit.
 928  **/
 929 static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
 930                                  struct fm10k_ring *ring)
 931 {
 932         struct fm10k_hw *hw = &interface->hw;
 933         int wait_loop = 10;
 934         u32 txdctl;
 935         u8 reg_idx = ring->reg_idx;
 936 
 937         /* if we are already enabled just exit */
 938         if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
 939                 return;
 940 
 941         /* poll to verify queue is enabled */
 942         do {
 943                 usleep_range(1000, 2000);
 944                 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
 945         } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
 946         if (!wait_loop)
 947                 netif_err(interface, drv, interface->netdev,
 948                           "Could not enable Tx Queue %d\n", reg_idx);
 949 }
 950 
 951 /**
 952  * fm10k_configure_tx - Configure Transmit Unit after Reset
 953  * @interface: board private structure
 954  *
 955  * Configure the Tx unit of the MAC after a reset.
 956  **/
 957 static void fm10k_configure_tx(struct fm10k_intfc *interface)
 958 {
 959         int i;
 960 
 961         /* Setup the HW Tx Head and Tail descriptor pointers */
 962         for (i = 0; i < interface->num_tx_queues; i++)
 963                 fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
 964 
 965         /* poll here to verify that Tx rings are now enabled */
 966         for (i = 0; i < interface->num_tx_queues; i++)
 967                 fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
 968 }
 969 
 970 /**
 971  * fm10k_configure_rx_ring - Configure Rx ring after Reset
 972  * @interface: board private structure
 973  * @ring: structure containing ring specific data
 974  *
 975  * Configure the Rx descriptor ring after a reset.
 976  **/
 977 static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
 978                                     struct fm10k_ring *ring)
 979 {
 980         u64 rdba = ring->dma;
 981         struct fm10k_hw *hw = &interface->hw;
 982         u32 size = ring->count * sizeof(union fm10k_rx_desc);
 983         u32 rxqctl, rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
 984         u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
 985         u32 rxint = FM10K_INT_MAP_DISABLE;
 986         u8 rx_pause = interface->rx_pause;
 987         u8 reg_idx = ring->reg_idx;
 988 
 989         /* disable queue to avoid issues while updating state */
 990         rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
 991         rxqctl &= ~FM10K_RXQCTL_ENABLE;
 992         fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
 993         fm10k_write_flush(hw);
 994 
 995         /* possible poll here to verify ring resources have been cleaned */
 996 
 997         /* set location and size for descriptor ring */
 998         fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
 999         fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
1000         fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
1001 
1002         /* reset head and tail pointers */
1003         fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
1004         fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
1005 
1006         /* store tail pointer */
1007         ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
1008 
1009         /* reset ntu and ntc to place SW in sync with hardware */
1010         ring->next_to_clean = 0;
1011         ring->next_to_use = 0;
1012         ring->next_to_alloc = 0;
1013 
1014         /* Configure the Rx buffer size for one buff without split */
1015         srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
1016 
1017         /* Configure the Rx ring to suppress loopback packets */
1018         srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
1019         fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
1020 
1021         /* Enable drop on empty */
1022 #ifdef CONFIG_DCB
1023         if (interface->pfc_en)
1024                 rx_pause = interface->pfc_en;
1025 #endif
1026         if (!(rx_pause & BIT(ring->qos_pc)))
1027                 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1028 
1029         fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1030 
1031         /* assign default VLAN to queue */
1032         ring->vid = hw->mac.default_vid;
1033 
1034         /* if we have an active VLAN, disable default VLAN ID */
1035         if (test_bit(hw->mac.default_vid, interface->active_vlans))
1036                 ring->vid |= FM10K_VLAN_CLEAR;
1037 
1038         /* Map interrupt */
1039         if (ring->q_vector) {
1040                 rxint = ring->q_vector->v_idx + NON_Q_VECTORS;
1041                 rxint |= FM10K_INT_MAP_TIMER1;
1042         }
1043 
1044         fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
1045 
1046         /* enable queue */
1047         rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
1048         rxqctl |= FM10K_RXQCTL_ENABLE;
1049         fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
1050 
1051         /* place buffers on ring for receive data */
1052         fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
1053 }
1054 
1055 /**
1056  * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
1057  * @interface: board private structure
1058  *
1059  * Configure the drop enable bits for the Rx rings.
1060  **/
1061 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
1062 {
1063         struct fm10k_hw *hw = &interface->hw;
1064         u8 rx_pause = interface->rx_pause;
1065         int i;
1066 
1067 #ifdef CONFIG_DCB
1068         if (interface->pfc_en)
1069                 rx_pause = interface->pfc_en;
1070 
1071 #endif
1072         for (i = 0; i < interface->num_rx_queues; i++) {
1073                 struct fm10k_ring *ring = interface->rx_ring[i];
1074                 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1075                 u8 reg_idx = ring->reg_idx;
1076 
1077                 if (!(rx_pause & BIT(ring->qos_pc)))
1078                         rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1079 
1080                 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1081         }
1082 }
1083 
1084 /**
1085  * fm10k_configure_dglort - Configure Receive DGLORT after reset
1086  * @interface: board private structure
1087  *
1088  * Configure the DGLORT description and RSS tables.
1089  **/
1090 static void fm10k_configure_dglort(struct fm10k_intfc *interface)
1091 {
1092         struct fm10k_dglort_cfg dglort = { 0 };
1093         struct fm10k_hw *hw = &interface->hw;
1094         int i;
1095         u32 mrqc;
1096 
1097         /* Fill out hash function seeds */
1098         for (i = 0; i < FM10K_RSSRK_SIZE; i++)
1099                 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
1100 
1101         /* Write RETA table to hardware */
1102         for (i = 0; i < FM10K_RETA_SIZE; i++)
1103                 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
1104 
1105         /* Generate RSS hash based on packet types, TCP/UDP
1106          * port numbers and/or IPv4/v6 src and dst addresses
1107          */
1108         mrqc = FM10K_MRQC_IPV4 |
1109                FM10K_MRQC_TCP_IPV4 |
1110                FM10K_MRQC_IPV6 |
1111                FM10K_MRQC_TCP_IPV6;
1112 
1113         if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP, interface->flags))
1114                 mrqc |= FM10K_MRQC_UDP_IPV4;
1115         if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP, interface->flags))
1116                 mrqc |= FM10K_MRQC_UDP_IPV6;
1117 
1118         fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
1119 
1120         /* configure default DGLORT mapping for RSS/DCB */
1121         dglort.inner_rss = 1;
1122         dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1123         dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1124         hw->mac.ops.configure_dglort_map(hw, &dglort);
1125 
1126         /* assign GLORT per queue for queue mapped testing */
1127         if (interface->glort_count > 64) {
1128                 memset(&dglort, 0, sizeof(dglort));
1129                 dglort.inner_rss = 1;
1130                 dglort.glort = interface->glort + 64;
1131                 dglort.idx = fm10k_dglort_pf_queue;
1132                 dglort.queue_l = fls(interface->num_rx_queues - 1);
1133                 hw->mac.ops.configure_dglort_map(hw, &dglort);
1134         }
1135 
1136         /* assign glort value for RSS/DCB specific to this interface */
1137         memset(&dglort, 0, sizeof(dglort));
1138         dglort.inner_rss = 1;
1139         dglort.glort = interface->glort;
1140         dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1141         dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1142         /* configure DGLORT mapping for RSS/DCB */
1143         dglort.idx = fm10k_dglort_pf_rss;
1144         if (interface->l2_accel)
1145                 dglort.shared_l = fls(interface->l2_accel->size);
1146         hw->mac.ops.configure_dglort_map(hw, &dglort);
1147 }
1148 
1149 /**
1150  * fm10k_configure_rx - Configure Receive Unit after Reset
1151  * @interface: board private structure
1152  *
1153  * Configure the Rx unit of the MAC after a reset.
1154  **/
1155 static void fm10k_configure_rx(struct fm10k_intfc *interface)
1156 {
1157         int i;
1158 
1159         /* Configure SWPRI to PC map */
1160         fm10k_configure_swpri_map(interface);
1161 
1162         /* Configure RSS and DGLORT map */
1163         fm10k_configure_dglort(interface);
1164 
1165         /* Setup the HW Rx Head and Tail descriptor pointers */
1166         for (i = 0; i < interface->num_rx_queues; i++)
1167                 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
1168 
1169         /* possible poll here to verify that Rx rings are now enabled */
1170 }
1171 
1172 static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
1173 {
1174         struct fm10k_q_vector *q_vector;
1175         int q_idx;
1176 
1177         for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1178                 q_vector = interface->q_vector[q_idx];
1179                 napi_enable(&q_vector->napi);
1180         }
1181 }
1182 
1183 static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
1184 {
1185         struct fm10k_q_vector *q_vector = data;
1186 
1187         if (q_vector->rx.count || q_vector->tx.count)
1188                 napi_schedule_irqoff(&q_vector->napi);
1189 
1190         return IRQ_HANDLED;
1191 }
1192 
1193 static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
1194 {
1195         struct fm10k_intfc *interface = data;
1196         struct fm10k_hw *hw = &interface->hw;
1197         struct fm10k_mbx_info *mbx = &hw->mbx;
1198 
1199         /* re-enable mailbox interrupt and indicate 20us delay */
1200         fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
1201                         (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1202                         FM10K_ITR_ENABLE);
1203 
1204         /* service upstream mailbox */
1205         if (fm10k_mbx_trylock(interface)) {
1206                 mbx->ops.process(hw, mbx);
1207                 fm10k_mbx_unlock(interface);
1208         }
1209 
1210         hw->mac.get_host_state = true;
1211         fm10k_service_event_schedule(interface);
1212 
1213         return IRQ_HANDLED;
1214 }
1215 
1216 #define FM10K_ERR_MSG(type) case (type): error = #type; break
1217 static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
1218                                struct fm10k_fault *fault)
1219 {
1220         struct pci_dev *pdev = interface->pdev;
1221         struct fm10k_hw *hw = &interface->hw;
1222         struct fm10k_iov_data *iov_data = interface->iov_data;
1223         char *error;
1224 
1225         switch (type) {
1226         case FM10K_PCA_FAULT:
1227                 switch (fault->type) {
1228                 default:
1229                         error = "Unknown PCA error";
1230                         break;
1231                 FM10K_ERR_MSG(PCA_NO_FAULT);
1232                 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
1233                 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
1234                 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
1235                 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
1236                 FM10K_ERR_MSG(PCA_POISONED_TLP);
1237                 FM10K_ERR_MSG(PCA_TLP_ABORT);
1238                 }
1239                 break;
1240         case FM10K_THI_FAULT:
1241                 switch (fault->type) {
1242                 default:
1243                         error = "Unknown THI error";
1244                         break;
1245                 FM10K_ERR_MSG(THI_NO_FAULT);
1246                 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1247                 }
1248                 break;
1249         case FM10K_FUM_FAULT:
1250                 switch (fault->type) {
1251                 default:
1252                         error = "Unknown FUM error";
1253                         break;
1254                 FM10K_ERR_MSG(FUM_NO_FAULT);
1255                 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
1256                 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
1257                 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
1258                 FM10K_ERR_MSG(FUM_RO_ERROR);
1259                 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
1260                 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
1261                 FM10K_ERR_MSG(FUM_INVALID_TYPE);
1262                 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
1263                 FM10K_ERR_MSG(FUM_INVALID_BE);
1264                 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
1265                 }
1266                 break;
1267         default:
1268                 error = "Undocumented fault";
1269                 break;
1270         }
1271 
1272         dev_warn(&pdev->dev,
1273                  "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
1274                  error, fault->address, fault->specinfo,
1275                  PCI_SLOT(fault->func), PCI_FUNC(fault->func));
1276 
1277         /* For VF faults, clear out the respective LPORT, reset the queue
1278          * resources, and then reconnect to the mailbox. This allows the
1279          * VF in question to resume behavior. For transient faults that are
1280          * the result of non-malicious behavior this will log the fault and
1281          * allow the VF to resume functionality. Obviously for malicious VFs
1282          * they will be able to attempt malicious behavior again. In this
1283          * case, the system administrator will need to step in and manually
1284          * remove or disable the VF in question.
1285          */
1286         if (fault->func && iov_data) {
1287                 int vf = fault->func - 1;
1288                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1289 
1290                 hw->iov.ops.reset_lport(hw, vf_info);
1291                 hw->iov.ops.reset_resources(hw, vf_info);
1292 
1293                 /* reset_lport disables the VF, so re-enable it */
1294                 hw->iov.ops.set_lport(hw, vf_info, vf,
1295                                       FM10K_VF_FLAG_MULTI_CAPABLE);
1296 
1297                 /* reset_resources will disconnect from the mbx  */
1298                 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1299         }
1300 }
1301 
1302 static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1303 {
1304         struct fm10k_hw *hw = &interface->hw;
1305         struct fm10k_fault fault = { 0 };
1306         int type, err;
1307 
1308         for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1309              eicr;
1310              eicr >>= 1, type += FM10K_FAULT_SIZE) {
1311                 /* only check if there is an error reported */
1312                 if (!(eicr & 0x1))
1313                         continue;
1314 
1315                 /* retrieve fault info */
1316                 err = hw->mac.ops.get_fault(hw, type, &fault);
1317                 if (err) {
1318                         dev_err(&interface->pdev->dev,
1319                                 "error reading fault\n");
1320                         continue;
1321                 }
1322 
1323                 fm10k_handle_fault(interface, type, &fault);
1324         }
1325 }
1326 
1327 static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1328 {
1329         struct fm10k_hw *hw = &interface->hw;
1330         const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1331         u32 maxholdq;
1332         int q;
1333 
1334         if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1335                 return;
1336 
1337         maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1338         if (maxholdq)
1339                 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1340         for (q = 255;;) {
1341                 if (maxholdq & BIT(31)) {
1342                         if (q < FM10K_MAX_QUEUES_PF) {
1343                                 interface->rx_overrun_pf++;
1344                                 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
1345                         } else {
1346                                 interface->rx_overrun_vf++;
1347                         }
1348                 }
1349 
1350                 maxholdq *= 2;
1351                 if (!maxholdq)
1352                         q &= ~(32 - 1);
1353 
1354                 if (!q)
1355                         break;
1356 
1357                 if (q-- % 32)
1358                         continue;
1359 
1360                 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1361                 if (maxholdq)
1362                         fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1363         }
1364 }
1365 
1366 static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1367 {
1368         struct fm10k_intfc *interface = data;
1369         struct fm10k_hw *hw = &interface->hw;
1370         struct fm10k_mbx_info *mbx = &hw->mbx;
1371         u32 eicr;
1372         s32 err = 0;
1373 
1374         /* unmask any set bits related to this interrupt */
1375         eicr = fm10k_read_reg(hw, FM10K_EICR);
1376         fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
1377                                                 FM10K_EICR_SWITCHREADY |
1378                                                 FM10K_EICR_SWITCHNOTREADY));
1379 
1380         /* report any faults found to the message log */
1381         fm10k_report_fault(interface, eicr);
1382 
1383         /* reset any queues disabled due to receiver overrun */
1384         fm10k_reset_drop_on_empty(interface, eicr);
1385 
1386         /* service mailboxes */
1387         if (fm10k_mbx_trylock(interface)) {
1388                 err = mbx->ops.process(hw, mbx);
1389                 /* handle VFLRE events */
1390                 fm10k_iov_event(interface);
1391                 fm10k_mbx_unlock(interface);
1392         }
1393 
1394         if (err == FM10K_ERR_RESET_REQUESTED)
1395                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1396 
1397         /* if switch toggled state we should reset GLORTs */
1398         if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1399                 /* force link down for at least 4 seconds */
1400                 interface->link_down_event = jiffies + (4 * HZ);
1401                 set_bit(__FM10K_LINK_DOWN, interface->state);
1402 
1403                 /* reset dglort_map back to no config */
1404                 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1405         }
1406 
1407         /* we should validate host state after interrupt event */
1408         hw->mac.get_host_state = true;
1409 
1410         /* validate host state, and handle VF mailboxes in the service task */
1411         fm10k_service_event_schedule(interface);
1412 
1413         /* re-enable mailbox interrupt and indicate 20us delay */
1414         fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1415                         (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1416                         FM10K_ITR_ENABLE);
1417 
1418         return IRQ_HANDLED;
1419 }
1420 
1421 void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1422 {
1423         struct fm10k_hw *hw = &interface->hw;
1424         struct msix_entry *entry;
1425         int itr_reg;
1426 
1427         /* no mailbox IRQ to free if MSI-X is not enabled */
1428         if (!interface->msix_entries)
1429                 return;
1430 
1431         entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1432 
1433         /* disconnect the mailbox */
1434         hw->mbx.ops.disconnect(hw, &hw->mbx);
1435 
1436         /* disable Mailbox cause */
1437         if (hw->mac.type == fm10k_mac_pf) {
1438                 fm10k_write_reg(hw, FM10K_EIMR,
1439                                 FM10K_EIMR_DISABLE(PCA_FAULT) |
1440                                 FM10K_EIMR_DISABLE(FUM_FAULT) |
1441                                 FM10K_EIMR_DISABLE(MAILBOX) |
1442                                 FM10K_EIMR_DISABLE(SWITCHREADY) |
1443                                 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1444                                 FM10K_EIMR_DISABLE(SRAMERROR) |
1445                                 FM10K_EIMR_DISABLE(VFLR) |
1446                                 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1447                 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1448         } else {
1449                 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1450         }
1451 
1452         fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1453 
1454         free_irq(entry->vector, interface);
1455 }
1456 
1457 static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1458                               struct fm10k_mbx_info *mbx)
1459 {
1460         bool vlan_override = hw->mac.vlan_override;
1461         u16 default_vid = hw->mac.default_vid;
1462         struct fm10k_intfc *interface;
1463         s32 err;
1464 
1465         err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1466         if (err)
1467                 return err;
1468 
1469         interface = container_of(hw, struct fm10k_intfc, hw);
1470 
1471         /* MAC was changed so we need reset */
1472         if (is_valid_ether_addr(hw->mac.perm_addr) &&
1473             !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1474                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1475 
1476         /* VLAN override was changed, or default VLAN changed */
1477         if ((vlan_override != hw->mac.vlan_override) ||
1478             (default_vid != hw->mac.default_vid))
1479                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1480 
1481         return 0;
1482 }
1483 
1484 /* generic error handler for mailbox issues */
1485 static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1486                            struct fm10k_mbx_info __always_unused *mbx)
1487 {
1488         struct fm10k_intfc *interface;
1489         struct pci_dev *pdev;
1490 
1491         interface = container_of(hw, struct fm10k_intfc, hw);
1492         pdev = interface->pdev;
1493 
1494         dev_err(&pdev->dev, "Unknown message ID %u\n",
1495                 **results & FM10K_TLV_ID_MASK);
1496 
1497         return 0;
1498 }
1499 
1500 static const struct fm10k_msg_data vf_mbx_data[] = {
1501         FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1502         FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1503         FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1504         FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1505 };
1506 
1507 static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1508 {
1509         struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1510         struct net_device *dev = interface->netdev;
1511         struct fm10k_hw *hw = &interface->hw;
1512         int err;
1513 
1514         /* Use timer0 for interrupt moderation on the mailbox */
1515         u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1516 
1517         /* register mailbox handlers */
1518         err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1519         if (err)
1520                 return err;
1521 
1522         /* request the IRQ */
1523         err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1524                           dev->name, interface);
1525         if (err) {
1526                 netif_err(interface, probe, dev,
1527                           "request_irq for msix_mbx failed: %d\n", err);
1528                 return err;
1529         }
1530 
1531         /* map all of the interrupt sources */
1532         fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1533 
1534         /* enable interrupt */
1535         fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1536 
1537         return 0;
1538 }
1539 
1540 static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1541                            struct fm10k_mbx_info *mbx)
1542 {
1543         struct fm10k_intfc *interface;
1544         u32 dglort_map = hw->mac.dglort_map;
1545         s32 err;
1546 
1547         interface = container_of(hw, struct fm10k_intfc, hw);
1548 
1549         err = fm10k_msg_err_pf(hw, results, mbx);
1550         if (!err && hw->swapi.status) {
1551                 /* force link down for a reasonable delay */
1552                 interface->link_down_event = jiffies + (2 * HZ);
1553                 set_bit(__FM10K_LINK_DOWN, interface->state);
1554 
1555                 /* reset dglort_map back to no config */
1556                 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1557 
1558                 fm10k_service_event_schedule(interface);
1559 
1560                 /* prevent overloading kernel message buffer */
1561                 if (interface->lport_map_failed)
1562                         return 0;
1563 
1564                 interface->lport_map_failed = true;
1565 
1566                 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1567                         dev_warn(&interface->pdev->dev,
1568                                  "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1569                 dev_warn(&interface->pdev->dev,
1570                          "request logical port map failed: %d\n",
1571                          hw->swapi.status);
1572 
1573                 return 0;
1574         }
1575 
1576         err = fm10k_msg_lport_map_pf(hw, results, mbx);
1577         if (err)
1578                 return err;
1579 
1580         interface->lport_map_failed = false;
1581 
1582         /* we need to reset if port count was just updated */
1583         if (dglort_map != hw->mac.dglort_map)
1584                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1585 
1586         return 0;
1587 }
1588 
1589 static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1590                              struct fm10k_mbx_info __always_unused *mbx)
1591 {
1592         struct fm10k_intfc *interface;
1593         u16 glort, pvid;
1594         u32 pvid_update;
1595         s32 err;
1596 
1597         err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1598                                      &pvid_update);
1599         if (err)
1600                 return err;
1601 
1602         /* extract values from the pvid update */
1603         glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1604         pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1605 
1606         /* if glort is not valid return error */
1607         if (!fm10k_glort_valid_pf(hw, glort))
1608                 return FM10K_ERR_PARAM;
1609 
1610         /* verify VLAN ID is valid */
1611         if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1612                 return FM10K_ERR_PARAM;
1613 
1614         interface = container_of(hw, struct fm10k_intfc, hw);
1615 
1616         /* check to see if this belongs to one of the VFs */
1617         err = fm10k_iov_update_pvid(interface, glort, pvid);
1618         if (!err)
1619                 return 0;
1620 
1621         /* we need to reset if default VLAN was just updated */
1622         if (pvid != hw->mac.default_vid)
1623                 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1624 
1625         hw->mac.default_vid = pvid;
1626 
1627         return 0;
1628 }
1629 
1630 static const struct fm10k_msg_data pf_mbx_data[] = {
1631         FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1632         FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1633         FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1634         FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1635         FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1636         FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1637         FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1638 };
1639 
1640 static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1641 {
1642         struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1643         struct net_device *dev = interface->netdev;
1644         struct fm10k_hw *hw = &interface->hw;
1645         int err;
1646 
1647         /* Use timer0 for interrupt moderation on the mailbox */
1648         u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1649         u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1650 
1651         /* register mailbox handlers */
1652         err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1653         if (err)
1654                 return err;
1655 
1656         /* request the IRQ */
1657         err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1658                           dev->name, interface);
1659         if (err) {
1660                 netif_err(interface, probe, dev,
1661                           "request_irq for msix_mbx failed: %d\n", err);
1662                 return err;
1663         }
1664 
1665         /* Enable interrupts w/ no moderation for "other" interrupts */
1666         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1667         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1668         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1669         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1670         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1671 
1672         /* Enable interrupts w/ moderation for mailbox */
1673         fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1674 
1675         /* Enable individual interrupt causes */
1676         fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1677                                         FM10K_EIMR_ENABLE(FUM_FAULT) |
1678                                         FM10K_EIMR_ENABLE(MAILBOX) |
1679                                         FM10K_EIMR_ENABLE(SWITCHREADY) |
1680                                         FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1681                                         FM10K_EIMR_ENABLE(SRAMERROR) |
1682                                         FM10K_EIMR_ENABLE(VFLR) |
1683                                         FM10K_EIMR_ENABLE(MAXHOLDTIME));
1684 
1685         /* enable interrupt */
1686         fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1687 
1688         return 0;
1689 }
1690 
1691 int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1692 {
1693         struct fm10k_hw *hw = &interface->hw;
1694         int err;
1695 
1696         /* enable Mailbox cause */
1697         if (hw->mac.type == fm10k_mac_pf)
1698                 err = fm10k_mbx_request_irq_pf(interface);
1699         else
1700                 err = fm10k_mbx_request_irq_vf(interface);
1701         if (err)
1702                 return err;
1703 
1704         /* connect mailbox */
1705         err = hw->mbx.ops.connect(hw, &hw->mbx);
1706 
1707         /* if the mailbox failed to connect, then free IRQ */
1708         if (err)
1709                 fm10k_mbx_free_irq(interface);
1710 
1711         return err;
1712 }
1713 
1714 /**
1715  * fm10k_qv_free_irq - release interrupts associated with queue vectors
1716  * @interface: board private structure
1717  *
1718  * Release all interrupts associated with this interface
1719  **/
1720 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1721 {
1722         int vector = interface->num_q_vectors;
1723         struct msix_entry *entry;
1724 
1725         entry = &interface->msix_entries[NON_Q_VECTORS + vector];
1726 
1727         while (vector) {
1728                 struct fm10k_q_vector *q_vector;
1729 
1730                 vector--;
1731                 entry--;
1732                 q_vector = interface->q_vector[vector];
1733 
1734                 if (!q_vector->tx.count && !q_vector->rx.count)
1735                         continue;
1736 
1737                 /* clear the affinity_mask in the IRQ descriptor */
1738                 irq_set_affinity_hint(entry->vector, NULL);
1739 
1740                 /* disable interrupts */
1741                 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1742 
1743                 free_irq(entry->vector, q_vector);
1744         }
1745 }
1746 
1747 /**
1748  * fm10k_qv_request_irq - initialize interrupts for queue vectors
1749  * @interface: board private structure
1750  *
1751  * Attempts to configure interrupts using the best available
1752  * capabilities of the hardware and kernel.
1753  **/
1754 int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1755 {
1756         struct net_device *dev = interface->netdev;
1757         struct fm10k_hw *hw = &interface->hw;
1758         struct msix_entry *entry;
1759         unsigned int ri = 0, ti = 0;
1760         int vector, err;
1761 
1762         entry = &interface->msix_entries[NON_Q_VECTORS];
1763 
1764         for (vector = 0; vector < interface->num_q_vectors; vector++) {
1765                 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1766 
1767                 /* name the vector */
1768                 if (q_vector->tx.count && q_vector->rx.count) {
1769                         snprintf(q_vector->name, sizeof(q_vector->name),
1770                                  "%s-TxRx-%u", dev->name, ri++);
1771                         ti++;
1772                 } else if (q_vector->rx.count) {
1773                         snprintf(q_vector->name, sizeof(q_vector->name),
1774                                  "%s-rx-%u", dev->name, ri++);
1775                 } else if (q_vector->tx.count) {
1776                         snprintf(q_vector->name, sizeof(q_vector->name),
1777                                  "%s-tx-%u", dev->name, ti++);
1778                 } else {
1779                         /* skip this unused q_vector */
1780                         continue;
1781                 }
1782 
1783                 /* Assign ITR register to q_vector */
1784                 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1785                                 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1786                                 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1787 
1788                 /* request the IRQ */
1789                 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1790                                   q_vector->name, q_vector);
1791                 if (err) {
1792                         netif_err(interface, probe, dev,
1793                                   "request_irq failed for MSIX interrupt Error: %d\n",
1794                                   err);
1795                         goto err_out;
1796                 }
1797 
1798                 /* assign the mask for this irq */
1799                 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1800 
1801                 /* Enable q_vector */
1802                 writel(FM10K_ITR_ENABLE, q_vector->itr);
1803 
1804                 entry++;
1805         }
1806 
1807         return 0;
1808 
1809 err_out:
1810         /* wind through the ring freeing all entries and vectors */
1811         while (vector) {
1812                 struct fm10k_q_vector *q_vector;
1813 
1814                 entry--;
1815                 vector--;
1816                 q_vector = interface->q_vector[vector];
1817 
1818                 if (!q_vector->tx.count && !q_vector->rx.count)
1819                         continue;
1820 
1821                 /* clear the affinity_mask in the IRQ descriptor */
1822                 irq_set_affinity_hint(entry->vector, NULL);
1823 
1824                 /* disable interrupts */
1825                 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1826 
1827                 free_irq(entry->vector, q_vector);
1828         }
1829 
1830         return err;
1831 }
1832 
1833 void fm10k_up(struct fm10k_intfc *interface)
1834 {
1835         struct fm10k_hw *hw = &interface->hw;
1836 
1837         /* Enable Tx/Rx DMA */
1838         hw->mac.ops.start_hw(hw);
1839 
1840         /* configure Tx descriptor rings */
1841         fm10k_configure_tx(interface);
1842 
1843         /* configure Rx descriptor rings */
1844         fm10k_configure_rx(interface);
1845 
1846         /* configure interrupts */
1847         hw->mac.ops.update_int_moderator(hw);
1848 
1849         /* enable statistics capture again */
1850         clear_bit(__FM10K_UPDATING_STATS, interface->state);
1851 
1852         /* clear down bit to indicate we are ready to go */
1853         clear_bit(__FM10K_DOWN, interface->state);
1854 
1855         /* enable polling cleanups */
1856         fm10k_napi_enable_all(interface);
1857 
1858         /* re-establish Rx filters */
1859         fm10k_restore_rx_state(interface);
1860 
1861         /* enable transmits */
1862         netif_tx_start_all_queues(interface->netdev);
1863 
1864         /* kick off the service timer now */
1865         hw->mac.get_host_state = true;
1866         mod_timer(&interface->service_timer, jiffies);
1867 }
1868 
1869 static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1870 {
1871         struct fm10k_q_vector *q_vector;
1872         int q_idx;
1873 
1874         for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1875                 q_vector = interface->q_vector[q_idx];
1876                 napi_disable(&q_vector->napi);
1877         }
1878 }
1879 
1880 void fm10k_down(struct fm10k_intfc *interface)
1881 {
1882         struct net_device *netdev = interface->netdev;
1883         struct fm10k_hw *hw = &interface->hw;
1884         int err, i = 0, count = 0;
1885 
1886         /* signal that we are down to the interrupt handler and service task */
1887         if (test_and_set_bit(__FM10K_DOWN, interface->state))
1888                 return;
1889 
1890         /* call carrier off first to avoid false dev_watchdog timeouts */
1891         netif_carrier_off(netdev);
1892 
1893         /* disable transmits */
1894         netif_tx_stop_all_queues(netdev);
1895         netif_tx_disable(netdev);
1896 
1897         /* reset Rx filters */
1898         fm10k_reset_rx_state(interface);
1899 
1900         /* disable polling routines */
1901         fm10k_napi_disable_all(interface);
1902 
1903         /* capture stats one last time before stopping interface */
1904         fm10k_update_stats(interface);
1905 
1906         /* prevent updating statistics while we're down */
1907         while (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
1908                 usleep_range(1000, 2000);
1909 
1910         /* skip waiting for TX DMA if we lost PCIe link */
1911         if (FM10K_REMOVED(hw->hw_addr))
1912                 goto skip_tx_dma_drain;
1913 
1914         /* In some rare circumstances it can take a while for Tx queues to
1915          * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1916          * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1917          * until the Tx queues have emptied, or until a number of retries. If
1918          * we fail to clear within the retry loop, we will issue a warning
1919          * indicating that Tx DMA is probably hung. Note this means we call
1920          * .stop_hw() twice but this shouldn't cause any problems.
1921          */
1922         err = hw->mac.ops.stop_hw(hw);
1923         if (err != FM10K_ERR_REQUESTS_PENDING)
1924                 goto skip_tx_dma_drain;
1925 
1926 #define TX_DMA_DRAIN_RETRIES 25
1927         for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1928                 usleep_range(10000, 20000);
1929 
1930                 /* start checking at the last ring to have pending Tx */
1931                 for (; i < interface->num_tx_queues; i++)
1932                         if (fm10k_get_tx_pending(interface->tx_ring[i], false))
1933                                 break;
1934 
1935                 /* if all the queues are drained, we can break now */
1936                 if (i == interface->num_tx_queues)
1937                         break;
1938         }
1939 
1940         if (count >= TX_DMA_DRAIN_RETRIES)
1941                 dev_err(&interface->pdev->dev,
1942                         "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1943                         count);
1944 skip_tx_dma_drain:
1945         /* Disable DMA engine for Tx/Rx */
1946         err = hw->mac.ops.stop_hw(hw);
1947         if (err == FM10K_ERR_REQUESTS_PENDING)
1948                 dev_err(&interface->pdev->dev,
1949                         "due to pending requests hw was not shut down gracefully\n");
1950         else if (err)
1951                 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1952 
1953         /* free any buffers still on the rings */
1954         fm10k_clean_all_tx_rings(interface);
1955         fm10k_clean_all_rx_rings(interface);
1956 }
1957 
1958 /**
1959  * fm10k_sw_init - Initialize general software structures
1960  * @interface: host interface private structure to initialize
1961  * @ent: PCI device ID entry
1962  *
1963  * fm10k_sw_init initializes the interface private data structure.
1964  * Fields are initialized based on PCI device information and
1965  * OS network device settings (MTU size).
1966  **/
1967 static int fm10k_sw_init(struct fm10k_intfc *interface,
1968                          const struct pci_device_id *ent)
1969 {
1970         const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1971         struct fm10k_hw *hw = &interface->hw;
1972         struct pci_dev *pdev = interface->pdev;
1973         struct net_device *netdev = interface->netdev;
1974         u32 rss_key[FM10K_RSSRK_SIZE];
1975         unsigned int rss;
1976         int err;
1977 
1978         /* initialize back pointer */
1979         hw->back = interface;
1980         hw->hw_addr = interface->uc_addr;
1981 
1982         /* PCI config space info */
1983         hw->vendor_id = pdev->vendor;
1984         hw->device_id = pdev->device;
1985         hw->revision_id = pdev->revision;
1986         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1987         hw->subsystem_device_id = pdev->subsystem_device;
1988 
1989         /* Setup hw api */
1990         memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1991         hw->mac.type = fi->mac;
1992 
1993         /* Setup IOV handlers */
1994         if (fi->iov_ops)
1995                 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1996 
1997         /* Set common capability flags and settings */
1998         rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
1999         interface->ring_feature[RING_F_RSS].limit = rss;
2000         fi->get_invariants(hw);
2001 
2002         /* pick up the PCIe bus settings for reporting later */
2003         if (hw->mac.ops.get_bus_info)
2004                 hw->mac.ops.get_bus_info(hw);
2005 
2006         /* limit the usable DMA range */
2007         if (hw->mac.ops.set_dma_mask)
2008                 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
2009 
2010         /* update netdev with DMA restrictions */
2011         if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
2012                 netdev->features |= NETIF_F_HIGHDMA;
2013                 netdev->vlan_features |= NETIF_F_HIGHDMA;
2014         }
2015 
2016         /* reset and initialize the hardware so it is in a known state */
2017         err = hw->mac.ops.reset_hw(hw);
2018         if (err) {
2019                 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
2020                 return err;
2021         }
2022 
2023         err = hw->mac.ops.init_hw(hw);
2024         if (err) {
2025                 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
2026                 return err;
2027         }
2028 
2029         /* initialize hardware statistics */
2030         hw->mac.ops.update_hw_stats(hw, &interface->stats);
2031 
2032         /* Set upper limit on IOV VFs that can be allocated */
2033         pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
2034 
2035         /* Start with random Ethernet address */
2036         eth_random_addr(hw->mac.addr);
2037 
2038         /* Initialize MAC address from hardware */
2039         err = hw->mac.ops.read_mac_addr(hw);
2040         if (err) {
2041                 dev_warn(&pdev->dev,
2042                          "Failed to obtain MAC address defaulting to random\n");
2043                 /* tag address assignment as random */
2044                 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2045         }
2046 
2047         ether_addr_copy(netdev->dev_addr, hw->mac.addr);
2048         ether_addr_copy(netdev->perm_addr, hw->mac.addr);
2049 
2050         if (!is_valid_ether_addr(netdev->perm_addr)) {
2051                 dev_err(&pdev->dev, "Invalid MAC Address\n");
2052                 return -EIO;
2053         }
2054 
2055         /* initialize DCBNL interface */
2056         fm10k_dcbnl_set_ops(netdev);
2057 
2058         /* set default ring sizes */
2059         interface->tx_ring_count = FM10K_DEFAULT_TXD;
2060         interface->rx_ring_count = FM10K_DEFAULT_RXD;
2061 
2062         /* set default interrupt moderation */
2063         interface->tx_itr = FM10K_TX_ITR_DEFAULT;
2064         interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
2065 
2066         /* initialize udp port lists */
2067         INIT_LIST_HEAD(&interface->vxlan_port);
2068         INIT_LIST_HEAD(&interface->geneve_port);
2069 
2070         /* Initialize the MAC/VLAN queue */
2071         INIT_LIST_HEAD(&interface->macvlan_requests);
2072 
2073         netdev_rss_key_fill(rss_key, sizeof(rss_key));
2074         memcpy(interface->rssrk, rss_key, sizeof(rss_key));
2075 
2076         /* Initialize the mailbox lock */
2077         spin_lock_init(&interface->mbx_lock);
2078         spin_lock_init(&interface->macvlan_lock);
2079 
2080         /* Start off interface as being down */
2081         set_bit(__FM10K_DOWN, interface->state);
2082         set_bit(__FM10K_UPDATING_STATS, interface->state);
2083 
2084         return 0;
2085 }
2086 
2087 /**
2088  * fm10k_probe - Device Initialization Routine
2089  * @pdev: PCI device information struct
2090  * @ent: entry in fm10k_pci_tbl
2091  *
2092  * Returns 0 on success, negative on failure
2093  *
2094  * fm10k_probe initializes an interface identified by a pci_dev structure.
2095  * The OS initialization, configuring of the interface private structure,
2096  * and a hardware reset occur.
2097  **/
2098 static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2099 {
2100         struct net_device *netdev;
2101         struct fm10k_intfc *interface;
2102         int err;
2103 
2104         if (pdev->error_state != pci_channel_io_normal) {
2105                 dev_err(&pdev->dev,
2106                         "PCI device still in an error state. Unable to load...\n");
2107                 return -EIO;
2108         }
2109 
2110         err = pci_enable_device_mem(pdev);
2111         if (err) {
2112                 dev_err(&pdev->dev,
2113                         "PCI enable device failed: %d\n", err);
2114                 return err;
2115         }
2116 
2117         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
2118         if (err)
2119                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2120         if (err) {
2121                 dev_err(&pdev->dev,
2122                         "DMA configuration failed: %d\n", err);
2123                 goto err_dma;
2124         }
2125 
2126         err = pci_request_mem_regions(pdev, fm10k_driver_name);
2127         if (err) {
2128                 dev_err(&pdev->dev,
2129                         "pci_request_selected_regions failed: %d\n", err);
2130                 goto err_pci_reg;
2131         }
2132 
2133         pci_enable_pcie_error_reporting(pdev);
2134 
2135         pci_set_master(pdev);
2136         pci_save_state(pdev);
2137 
2138         netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
2139         if (!netdev) {
2140                 err = -ENOMEM;
2141                 goto err_alloc_netdev;
2142         }
2143 
2144         SET_NETDEV_DEV(netdev, &pdev->dev);
2145 
2146         interface = netdev_priv(netdev);
2147         pci_set_drvdata(pdev, interface);
2148 
2149         interface->netdev = netdev;
2150         interface->pdev = pdev;
2151 
2152         interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
2153                                      FM10K_UC_ADDR_SIZE);
2154         if (!interface->uc_addr) {
2155                 err = -EIO;
2156                 goto err_ioremap;
2157         }
2158 
2159         err = fm10k_sw_init(interface, ent);
2160         if (err)
2161                 goto err_sw_init;
2162 
2163         /* enable debugfs support */
2164         fm10k_dbg_intfc_init(interface);
2165 
2166         err = fm10k_init_queueing_scheme(interface);
2167         if (err)
2168                 goto err_sw_init;
2169 
2170         /* the mbx interrupt might attempt to schedule the service task, so we
2171          * must ensure it is disabled since we haven't yet requested the timer
2172          * or work item.
2173          */
2174         set_bit(__FM10K_SERVICE_DISABLE, interface->state);
2175 
2176         err = fm10k_mbx_request_irq(interface);
2177         if (err)
2178                 goto err_mbx_interrupt;
2179 
2180         /* final check of hardware state before registering the interface */
2181         err = fm10k_hw_ready(interface);
2182         if (err)
2183                 goto err_register;
2184 
2185         err = register_netdev(netdev);
2186         if (err)
2187                 goto err_register;
2188 
2189         /* carrier off reporting is important to ethtool even BEFORE open */
2190         netif_carrier_off(netdev);
2191 
2192         /* stop all the transmit queues from transmitting until link is up */
2193         netif_tx_stop_all_queues(netdev);
2194 
2195         /* Initialize service timer and service task late in order to avoid
2196          * cleanup issues.
2197          */
2198         timer_setup(&interface->service_timer, fm10k_service_timer, 0);
2199         INIT_WORK(&interface->service_task, fm10k_service_task);
2200 
2201         /* Setup the MAC/VLAN queue */
2202         INIT_DELAYED_WORK(&interface->macvlan_task, fm10k_macvlan_task);
2203 
2204         /* kick off service timer now, even when interface is down */
2205         mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2206 
2207         /* print warning for non-optimal configurations */
2208         pcie_print_link_status(interface->pdev);
2209 
2210         /* report MAC address for logging */
2211         dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2212 
2213         /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2214         fm10k_iov_configure(pdev, 0);
2215 
2216         /* clear the service task disable bit and kick off service task */
2217         clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
2218         fm10k_service_event_schedule(interface);
2219 
2220         return 0;
2221 
2222 err_register:
2223         fm10k_mbx_free_irq(interface);
2224 err_mbx_interrupt:
2225         fm10k_clear_queueing_scheme(interface);
2226 err_sw_init:
2227         if (interface->sw_addr)
2228                 iounmap(interface->sw_addr);
2229         iounmap(interface->uc_addr);
2230 err_ioremap:
2231         free_netdev(netdev);
2232 err_alloc_netdev:
2233         pci_release_mem_regions(pdev);
2234 err_pci_reg:
2235 err_dma:
2236         pci_disable_device(pdev);
2237         return err;
2238 }
2239 
2240 /**
2241  * fm10k_remove - Device Removal Routine
2242  * @pdev: PCI device information struct
2243  *
2244  * fm10k_remove is called by the PCI subsystem to alert the driver
2245  * that it should release a PCI device.  The could be caused by a
2246  * Hot-Plug event, or because the driver is going to be removed from
2247  * memory.
2248  **/
2249 static void fm10k_remove(struct pci_dev *pdev)
2250 {
2251         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2252         struct net_device *netdev = interface->netdev;
2253 
2254         del_timer_sync(&interface->service_timer);
2255 
2256         fm10k_stop_service_event(interface);
2257         fm10k_stop_macvlan_task(interface);
2258 
2259         /* Remove all pending MAC/VLAN requests */
2260         fm10k_clear_macvlan_queue(interface, interface->glort, true);
2261 
2262         /* free netdev, this may bounce the interrupts due to setup_tc */
2263         if (netdev->reg_state == NETREG_REGISTERED)
2264                 unregister_netdev(netdev);
2265 
2266         /* release VFs */
2267         fm10k_iov_disable(pdev);
2268 
2269         /* disable mailbox interrupt */
2270         fm10k_mbx_free_irq(interface);
2271 
2272         /* free interrupts */
2273         fm10k_clear_queueing_scheme(interface);
2274 
2275         /* remove any debugfs interfaces */
2276         fm10k_dbg_intfc_exit(interface);
2277 
2278         if (interface->sw_addr)
2279                 iounmap(interface->sw_addr);
2280         iounmap(interface->uc_addr);
2281 
2282         free_netdev(netdev);
2283 
2284         pci_release_mem_regions(pdev);
2285 
2286         pci_disable_pcie_error_reporting(pdev);
2287 
2288         pci_disable_device(pdev);
2289 }
2290 
2291 static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2292 {
2293         /* the watchdog task reads from registers, which might appear like
2294          * a surprise remove if the PCIe device is disabled while we're
2295          * stopped. We stop the watchdog task until after we resume software
2296          * activity.
2297          *
2298          * Note that the MAC/VLAN task will be stopped as part of preparing
2299          * for reset so we don't need to handle it here.
2300          */
2301         fm10k_stop_service_event(interface);
2302 
2303         if (fm10k_prepare_for_reset(interface))
2304                 set_bit(__FM10K_RESET_SUSPENDED, interface->state);
2305 }
2306 
2307 static int fm10k_handle_resume(struct fm10k_intfc *interface)
2308 {
2309         struct fm10k_hw *hw = &interface->hw;
2310         int err;
2311 
2312         /* Even if we didn't properly prepare for reset in
2313          * fm10k_prepare_suspend, we'll attempt to resume anyways.
2314          */
2315         if (!test_and_clear_bit(__FM10K_RESET_SUSPENDED, interface->state))
2316                 dev_warn(&interface->pdev->dev,
2317                          "Device was shut down as part of suspend... Attempting to recover\n");
2318 
2319         /* reset statistics starting values */
2320         hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2321 
2322         err = fm10k_handle_reset(interface);
2323         if (err)
2324                 return err;
2325 
2326         /* assume host is not ready, to prevent race with watchdog in case we
2327          * actually don't have connection to the switch
2328          */
2329         interface->host_ready = false;
2330         fm10k_watchdog_host_not_ready(interface);
2331 
2332         /* force link to stay down for a second to prevent link flutter */
2333         interface->link_down_event = jiffies + (HZ);
2334         set_bit(__FM10K_LINK_DOWN, interface->state);
2335 
2336         /* restart the service task */
2337         fm10k_start_service_event(interface);
2338 
2339         /* Restart the MAC/VLAN request queue in-case of outstanding events */
2340         fm10k_macvlan_schedule(interface);
2341 
2342         return 0;
2343 }
2344 
2345 /**
2346  * fm10k_resume - Generic PM resume hook
2347  * @dev: generic device structure
2348  *
2349  * Generic PM hook used when waking the device from a low power state after
2350  * suspend or hibernation. This function does not need to handle lower PCIe
2351  * device state as the stack takes care of that for us.
2352  **/
2353 static int __maybe_unused fm10k_resume(struct device *dev)
2354 {
2355         struct fm10k_intfc *interface = dev_get_drvdata(dev);
2356         struct net_device *netdev = interface->netdev;
2357         struct fm10k_hw *hw = &interface->hw;
2358         int err;
2359 
2360         /* refresh hw_addr in case it was dropped */
2361         hw->hw_addr = interface->uc_addr;
2362 
2363         err = fm10k_handle_resume(interface);
2364         if (err)
2365                 return err;
2366 
2367         netif_device_attach(netdev);
2368 
2369         return 0;
2370 }
2371 
2372 /**
2373  * fm10k_suspend - Generic PM suspend hook
2374  * @dev: generic device structure
2375  *
2376  * Generic PM hook used when setting the device into a low power state for
2377  * system suspend or hibernation. This function does not need to handle lower
2378  * PCIe device state as the stack takes care of that for us.
2379  **/
2380 static int __maybe_unused fm10k_suspend(struct device *dev)
2381 {
2382         struct fm10k_intfc *interface = dev_get_drvdata(dev);
2383         struct net_device *netdev = interface->netdev;
2384 
2385         netif_device_detach(netdev);
2386 
2387         fm10k_prepare_suspend(interface);
2388 
2389         return 0;
2390 }
2391 
2392 /**
2393  * fm10k_io_error_detected - called when PCI error is detected
2394  * @pdev: Pointer to PCI device
2395  * @state: The current pci connection state
2396  *
2397  * This function is called after a PCI bus error affecting
2398  * this device has been detected.
2399  */
2400 static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2401                                                 pci_channel_state_t state)
2402 {
2403         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2404         struct net_device *netdev = interface->netdev;
2405 
2406         netif_device_detach(netdev);
2407 
2408         if (state == pci_channel_io_perm_failure)
2409                 return PCI_ERS_RESULT_DISCONNECT;
2410 
2411         fm10k_prepare_suspend(interface);
2412 
2413         /* Request a slot reset. */
2414         return PCI_ERS_RESULT_NEED_RESET;
2415 }
2416 
2417 /**
2418  * fm10k_io_slot_reset - called after the pci bus has been reset.
2419  * @pdev: Pointer to PCI device
2420  *
2421  * Restart the card from scratch, as if from a cold-boot.
2422  */
2423 static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2424 {
2425         pci_ers_result_t result;
2426 
2427         if (pci_reenable_device(pdev)) {
2428                 dev_err(&pdev->dev,
2429                         "Cannot re-enable PCI device after reset.\n");
2430                 result = PCI_ERS_RESULT_DISCONNECT;
2431         } else {
2432                 pci_set_master(pdev);
2433                 pci_restore_state(pdev);
2434 
2435                 /* After second error pci->state_saved is false, this
2436                  * resets it so EEH doesn't break.
2437                  */
2438                 pci_save_state(pdev);
2439 
2440                 pci_wake_from_d3(pdev, false);
2441 
2442                 result = PCI_ERS_RESULT_RECOVERED;
2443         }
2444 
2445         return result;
2446 }
2447 
2448 /**
2449  * fm10k_io_resume - called when traffic can start flowing again.
2450  * @pdev: Pointer to PCI device
2451  *
2452  * This callback is called when the error recovery driver tells us that
2453  * its OK to resume normal operation.
2454  */
2455 static void fm10k_io_resume(struct pci_dev *pdev)
2456 {
2457         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2458         struct net_device *netdev = interface->netdev;
2459         int err;
2460 
2461         err = fm10k_handle_resume(interface);
2462 
2463         if (err)
2464                 dev_warn(&pdev->dev,
2465                          "%s failed: %d\n", __func__, err);
2466         else
2467                 netif_device_attach(netdev);
2468 }
2469 
2470 /**
2471  * fm10k_io_reset_prepare - called when PCI function is about to be reset
2472  * @pdev: Pointer to PCI device
2473  *
2474  * This callback is called when the PCI function is about to be reset,
2475  * allowing the device driver to prepare for it.
2476  */
2477 static void fm10k_io_reset_prepare(struct pci_dev *pdev)
2478 {
2479         /* warn incase we have any active VF devices */
2480         if (pci_num_vf(pdev))
2481                 dev_warn(&pdev->dev,
2482                          "PCIe FLR may cause issues for any active VF devices\n");
2483         fm10k_prepare_suspend(pci_get_drvdata(pdev));
2484 }
2485 
2486 /**
2487  * fm10k_io_reset_done - called when PCI function has finished resetting
2488  * @pdev: Pointer to PCI device
2489  *
2490  * This callback is called just after the PCI function is reset, such as via
2491  * /sys/class/net/<enpX>/device/reset or similar.
2492  */
2493 static void fm10k_io_reset_done(struct pci_dev *pdev)
2494 {
2495         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2496         int err = fm10k_handle_resume(interface);
2497 
2498         if (err) {
2499                 dev_warn(&pdev->dev,
2500                          "%s failed: %d\n", __func__, err);
2501                 netif_device_detach(interface->netdev);
2502         }
2503 }
2504 
2505 static const struct pci_error_handlers fm10k_err_handler = {
2506         .error_detected = fm10k_io_error_detected,
2507         .slot_reset = fm10k_io_slot_reset,
2508         .resume = fm10k_io_resume,
2509         .reset_prepare = fm10k_io_reset_prepare,
2510         .reset_done = fm10k_io_reset_done,
2511 };
2512 
2513 static SIMPLE_DEV_PM_OPS(fm10k_pm_ops, fm10k_suspend, fm10k_resume);
2514 
2515 static struct pci_driver fm10k_driver = {
2516         .name                   = fm10k_driver_name,
2517         .id_table               = fm10k_pci_tbl,
2518         .probe                  = fm10k_probe,
2519         .remove                 = fm10k_remove,
2520         .driver = {
2521                 .pm             = &fm10k_pm_ops,
2522         },
2523         .sriov_configure        = fm10k_iov_configure,
2524         .err_handler            = &fm10k_err_handler
2525 };
2526 
2527 /**
2528  * fm10k_register_pci_driver - register driver interface
2529  *
2530  * This function is called on module load in order to register the driver.
2531  **/
2532 int fm10k_register_pci_driver(void)
2533 {
2534         return pci_register_driver(&fm10k_driver);
2535 }
2536 
2537 /**
2538  * fm10k_unregister_pci_driver - unregister driver interface
2539  *
2540  * This function is called on module unload in order to remove the driver.
2541  **/
2542 void fm10k_unregister_pci_driver(void)
2543 {
2544         pci_unregister_driver(&fm10k_driver);
2545 }