1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2019 Intel Corporation. */
4 #include <linux/module.h>
5 #include <linux/interrupt.h>
10 static const struct fm10k_info *fm10k_info_tbl[] = {
11 [fm10k_device_pf] = &fm10k_pf_info,
12 [fm10k_device_vf] = &fm10k_vf_info,
16 * fm10k_pci_tbl - PCI Device ID Table
18 * Wildcard entries (PCI_ANY_ID) should come last
19 * Last entry must be all 0s
21 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
22 * Class, Class Mask, private data (not used) }
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 */
32 MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
34 u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
36 struct fm10k_intfc *interface = hw->back;
39 if (FM10K_REMOVED(hw->hw_addr))
42 pci_read_config_word(interface->pdev, reg, &value);
44 fm10k_write_flush(hw);
49 u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
51 u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
54 if (FM10K_REMOVED(hw_addr))
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;
63 netif_device_detach(netdev);
64 netdev_err(netdev, "PCIe link lost, device now detached\n");
70 static int fm10k_hw_ready(struct fm10k_intfc *interface)
72 struct fm10k_hw *hw = &interface->hw;
74 fm10k_write_flush(hw);
76 return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
80 * fm10k_macvlan_schedule - Schedule MAC/VLAN queue task
81 * @interface: fm10k private interface structure
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.
86 void fm10k_macvlan_schedule(struct fm10k_intfc *interface)
88 /* Avoid processing the MAC/VLAN queue when the service task is
89 * disabled, or when we're resetting the device.
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
99 queue_delayed_work(fm10k_workqueue,
100 &interface->macvlan_task, 10);
102 set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
107 * fm10k_stop_macvlan_task - Stop the MAC/VLAN queue monitor
108 * @interface: fm10k private interface structure
110 * Wait until the MAC/VLAN queue task has stopped, and cancel any future
113 static void fm10k_stop_macvlan_task(struct fm10k_intfc *interface)
115 /* Disable the MAC/VLAN work item */
116 set_bit(__FM10K_MACVLAN_DISABLE, interface->state);
118 /* Make sure we waited until any current invocations have stopped */
119 cancel_delayed_work_sync(&interface->macvlan_task);
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
127 clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
131 * fm10k_resume_macvlan_task - Restart the MAC/VLAN queue monitor
132 * @interface: fm10k private interface structure
134 * Clear the __FM10K_MACVLAN_DISABLE bit and, if a request occurred, schedule
135 * the MAC/VLAN work monitor.
137 static void fm10k_resume_macvlan_task(struct fm10k_intfc *interface)
139 /* Re-enable the MAC/VLAN work item */
140 clear_bit(__FM10K_MACVLAN_DISABLE, interface->state);
142 /* We might have received a MAC/VLAN request while disabled. If so,
143 * kick off the queue now.
145 if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
146 fm10k_macvlan_schedule(interface);
149 void fm10k_service_event_schedule(struct fm10k_intfc *interface)
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);
156 set_bit(__FM10K_SERVICE_REQUEST, interface->state);
160 static void fm10k_service_event_complete(struct fm10k_intfc *interface)
162 WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, interface->state));
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);
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
172 if (test_bit(__FM10K_SERVICE_REQUEST, interface->state))
173 fm10k_service_event_schedule(interface);
176 static void fm10k_stop_service_event(struct fm10k_intfc *interface)
178 set_bit(__FM10K_SERVICE_DISABLE, interface->state);
179 cancel_work_sync(&interface->service_task);
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
188 clear_bit(__FM10K_SERVICE_SCHED, interface->state);
191 static void fm10k_start_service_event(struct fm10k_intfc *interface)
193 clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
194 fm10k_service_event_schedule(interface);
198 * fm10k_service_timer - Timer Call-back
199 * @t: pointer to timer data
201 static void fm10k_service_timer(struct timer_list *t)
203 struct fm10k_intfc *interface = from_timer(interface, t,
206 /* Reset the timer */
207 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
209 fm10k_service_event_schedule(interface);
213 * fm10k_prepare_for_reset - Prepare the driver and device for a pending reset
214 * @interface: fm10k private data structure
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.
220 static bool fm10k_prepare_for_reset(struct fm10k_intfc *interface)
222 struct net_device *netdev = interface->netdev;
224 /* put off any impending NetWatchDogTimeout */
225 netif_trans_update(netdev);
227 /* Nothing to do if a reset is already in progress */
228 if (test_and_set_bit(__FM10K_RESETTING, interface->state))
231 /* As the MAC/VLAN task will be accessing registers it must not be
232 * running while we reset. Although the task will not be scheduled
233 * once we start resetting it may already be running
235 fm10k_stop_macvlan_task(interface);
239 fm10k_iov_suspend(interface->pdev);
241 if (netif_running(netdev))
244 fm10k_mbx_free_irq(interface);
246 /* free interrupts */
247 fm10k_clear_queueing_scheme(interface);
249 /* delay any future reset requests */
250 interface->last_reset = jiffies + (10 * HZ);
257 static int fm10k_handle_reset(struct fm10k_intfc *interface)
259 struct net_device *netdev = interface->netdev;
260 struct fm10k_hw *hw = &interface->hw;
263 WARN_ON(!test_bit(__FM10K_RESETTING, interface->state));
267 pci_set_master(interface->pdev);
269 /* reset and initialize the hardware so it is in a known state */
270 err = hw->mac.ops.reset_hw(hw);
272 dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
276 err = hw->mac.ops.init_hw(hw);
278 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
282 err = fm10k_init_queueing_scheme(interface);
284 dev_err(&interface->pdev->dev,
285 "init_queueing_scheme failed: %d\n", err);
289 /* re-associate interrupts */
290 err = fm10k_mbx_request_irq(interface);
294 err = fm10k_hw_ready(interface);
298 /* update hardware address for VFs if perm_addr has changed */
299 if (hw->mac.type == fm10k_mac_vf) {
300 if (is_valid_ether_addr(hw->mac.perm_addr)) {
301 ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
302 ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
303 ether_addr_copy(netdev->dev_addr, hw->mac.perm_addr);
304 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
307 if (hw->mac.vlan_override)
308 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
310 netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
313 err = netif_running(netdev) ? fm10k_open(netdev) : 0;
317 fm10k_iov_resume(interface->pdev);
321 fm10k_resume_macvlan_task(interface);
323 clear_bit(__FM10K_RESETTING, interface->state);
327 fm10k_mbx_free_irq(interface);
329 fm10k_clear_queueing_scheme(interface);
331 netif_device_detach(netdev);
335 clear_bit(__FM10K_RESETTING, interface->state);
340 static void fm10k_detach_subtask(struct fm10k_intfc *interface)
342 struct net_device *netdev = interface->netdev;
343 u32 __iomem *hw_addr;
346 /* do nothing if netdev is still present or hw_addr is set */
347 if (netif_device_present(netdev) || interface->hw.hw_addr)
350 /* We've lost the PCIe register space, and can no longer access the
351 * device. Shut everything except the detach subtask down and prepare
352 * to reset the device in case we recover. If we actually prepare for
353 * reset, indicate that we're detached.
355 if (fm10k_prepare_for_reset(interface))
356 set_bit(__FM10K_RESET_DETACHED, interface->state);
358 /* check the real address space to see if we've recovered */
359 hw_addr = READ_ONCE(interface->uc_addr);
360 value = readl(hw_addr);
364 /* Make sure the reset was initiated because we detached,
365 * otherwise we might race with a different reset flow.
367 if (!test_and_clear_bit(__FM10K_RESET_DETACHED,
371 /* Restore the hardware address */
372 interface->hw.hw_addr = interface->uc_addr;
374 /* PCIe link has been restored, and the device is active
375 * again. Restore everything and reset the device.
377 err = fm10k_handle_reset(interface);
379 netdev_err(netdev, "Unable to reset device: %d\n", err);
380 interface->hw.hw_addr = NULL;
384 /* Re-attach the netdev */
385 netif_device_attach(netdev);
386 netdev_warn(netdev, "PCIe link restored, device now attached\n");
391 static void fm10k_reset_subtask(struct fm10k_intfc *interface)
395 if (!test_and_clear_bit(FM10K_FLAG_RESET_REQUESTED,
399 /* If another thread has already prepared to reset the device, we
400 * should not attempt to handle a reset here, since we'd race with
401 * that thread. This may happen if we suspend the device or if the
402 * PCIe link is lost. In this case, we'll just ignore the RESET
403 * request, as it will (eventually) be taken care of when the thread
404 * which actually started the reset is finished.
406 if (!fm10k_prepare_for_reset(interface))
409 netdev_err(interface->netdev, "Reset interface\n");
411 err = fm10k_handle_reset(interface);
413 dev_err(&interface->pdev->dev,
414 "fm10k_handle_reset failed: %d\n", err);
418 * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
419 * @interface: board private structure
421 * Configure the SWPRI to PC mapping for the port.
423 static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
425 struct net_device *netdev = interface->netdev;
426 struct fm10k_hw *hw = &interface->hw;
429 /* clear flag indicating update is needed */
430 clear_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
432 /* these registers are only available on the PF */
433 if (hw->mac.type != fm10k_mac_pf)
436 /* configure SWPRI to PC map */
437 for (i = 0; i < FM10K_SWPRI_MAX; i++)
438 fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
439 netdev_get_prio_tc_map(netdev, i));
443 * fm10k_watchdog_update_host_state - Update the link status based on host.
444 * @interface: board private structure
446 static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
448 struct fm10k_hw *hw = &interface->hw;
451 if (test_bit(__FM10K_LINK_DOWN, interface->state)) {
452 interface->host_ready = false;
453 if (time_is_after_jiffies(interface->link_down_event))
455 clear_bit(__FM10K_LINK_DOWN, interface->state);
458 if (test_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags)) {
459 if (rtnl_trylock()) {
460 fm10k_configure_swpri_map(interface);
465 /* lock the mailbox for transmit and receive */
466 fm10k_mbx_lock(interface);
468 err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
469 if (err && time_is_before_jiffies(interface->last_reset))
470 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
473 fm10k_mbx_unlock(interface);
477 * fm10k_mbx_subtask - Process upstream and downstream mailboxes
478 * @interface: board private structure
480 * This function will process both the upstream and downstream mailboxes.
482 static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
484 /* If we're resetting, bail out */
485 if (test_bit(__FM10K_RESETTING, interface->state))
488 /* process upstream mailbox and update device state */
489 fm10k_watchdog_update_host_state(interface);
491 /* process downstream mailboxes */
492 fm10k_iov_mbx(interface);
496 * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
497 * @interface: board private structure
499 static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
501 struct net_device *netdev = interface->netdev;
503 /* only continue if link state is currently down */
504 if (netif_carrier_ok(netdev))
507 netif_info(interface, drv, netdev, "NIC Link is up\n");
509 netif_carrier_on(netdev);
510 netif_tx_wake_all_queues(netdev);
514 * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
515 * @interface: board private structure
517 static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
519 struct net_device *netdev = interface->netdev;
521 /* only continue if link state is currently up */
522 if (!netif_carrier_ok(netdev))
525 netif_info(interface, drv, netdev, "NIC Link is down\n");
527 netif_carrier_off(netdev);
528 netif_tx_stop_all_queues(netdev);
532 * fm10k_update_stats - Update the board statistics counters.
533 * @interface: board private structure
535 void fm10k_update_stats(struct fm10k_intfc *interface)
537 struct net_device_stats *net_stats = &interface->netdev->stats;
538 struct fm10k_hw *hw = &interface->hw;
539 u64 hw_csum_tx_good = 0, hw_csum_rx_good = 0, rx_length_errors = 0;
540 u64 rx_switch_errors = 0, rx_drops = 0, rx_pp_errors = 0;
541 u64 rx_link_errors = 0;
542 u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
543 u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
544 u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
545 u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
549 /* ensure only one thread updates stats at a time */
550 if (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
553 /* do not allow stats update via service task for next second */
554 interface->next_stats_update = jiffies + HZ;
556 /* gather some stats to the interface struct that are per queue */
557 for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
558 struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]);
563 restart_queue += tx_ring->tx_stats.restart_queue;
564 tx_busy += tx_ring->tx_stats.tx_busy;
565 tx_csum_errors += tx_ring->tx_stats.csum_err;
566 bytes += tx_ring->stats.bytes;
567 pkts += tx_ring->stats.packets;
568 hw_csum_tx_good += tx_ring->tx_stats.csum_good;
571 interface->restart_queue = restart_queue;
572 interface->tx_busy = tx_busy;
573 net_stats->tx_bytes = bytes;
574 net_stats->tx_packets = pkts;
575 interface->tx_csum_errors = tx_csum_errors;
576 interface->hw_csum_tx_good = hw_csum_tx_good;
578 /* gather some stats to the interface struct that are per queue */
579 for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
580 struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]);
585 bytes += rx_ring->stats.bytes;
586 pkts += rx_ring->stats.packets;
587 alloc_failed += rx_ring->rx_stats.alloc_failed;
588 rx_csum_errors += rx_ring->rx_stats.csum_err;
589 rx_errors += rx_ring->rx_stats.errors;
590 hw_csum_rx_good += rx_ring->rx_stats.csum_good;
591 rx_switch_errors += rx_ring->rx_stats.switch_errors;
592 rx_drops += rx_ring->rx_stats.drops;
593 rx_pp_errors += rx_ring->rx_stats.pp_errors;
594 rx_link_errors += rx_ring->rx_stats.link_errors;
595 rx_length_errors += rx_ring->rx_stats.length_errors;
598 net_stats->rx_bytes = bytes;
599 net_stats->rx_packets = pkts;
600 interface->alloc_failed = alloc_failed;
601 interface->rx_csum_errors = rx_csum_errors;
602 interface->hw_csum_rx_good = hw_csum_rx_good;
603 interface->rx_switch_errors = rx_switch_errors;
604 interface->rx_drops = rx_drops;
605 interface->rx_pp_errors = rx_pp_errors;
606 interface->rx_link_errors = rx_link_errors;
607 interface->rx_length_errors = rx_length_errors;
609 hw->mac.ops.update_hw_stats(hw, &interface->stats);
611 for (i = 0; i < hw->mac.max_queues; i++) {
612 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
614 tx_bytes_nic += q->tx_bytes.count;
615 tx_pkts_nic += q->tx_packets.count;
616 rx_bytes_nic += q->rx_bytes.count;
617 rx_pkts_nic += q->rx_packets.count;
618 rx_drops_nic += q->rx_drops.count;
621 interface->tx_bytes_nic = tx_bytes_nic;
622 interface->tx_packets_nic = tx_pkts_nic;
623 interface->rx_bytes_nic = rx_bytes_nic;
624 interface->rx_packets_nic = rx_pkts_nic;
625 interface->rx_drops_nic = rx_drops_nic;
627 /* Fill out the OS statistics structure */
628 net_stats->rx_errors = rx_errors;
629 net_stats->rx_dropped = interface->stats.nodesc_drop.count;
631 /* Update VF statistics */
632 fm10k_iov_update_stats(interface);
634 clear_bit(__FM10K_UPDATING_STATS, interface->state);
638 * fm10k_watchdog_flush_tx - flush queues on host not ready
639 * @interface: pointer to the device interface structure
641 static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
643 int some_tx_pending = 0;
646 /* nothing to do if carrier is up */
647 if (netif_carrier_ok(interface->netdev))
650 for (i = 0; i < interface->num_tx_queues; i++) {
651 struct fm10k_ring *tx_ring = interface->tx_ring[i];
653 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
659 /* We've lost link, so the controller stops DMA, but we've got
660 * queued Tx work that's never going to get done, so reset
661 * controller to flush Tx.
664 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
668 * fm10k_watchdog_subtask - check and bring link up
669 * @interface: pointer to the device interface structure
671 static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
673 /* if interface is down do nothing */
674 if (test_bit(__FM10K_DOWN, interface->state) ||
675 test_bit(__FM10K_RESETTING, interface->state))
678 if (interface->host_ready)
679 fm10k_watchdog_host_is_ready(interface);
681 fm10k_watchdog_host_not_ready(interface);
683 /* update stats only once every second */
684 if (time_is_before_jiffies(interface->next_stats_update))
685 fm10k_update_stats(interface);
687 /* flush any uncompleted work */
688 fm10k_watchdog_flush_tx(interface);
692 * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
693 * @interface: pointer to the device interface structure
695 * This function serves two purposes. First it strobes the interrupt lines
696 * in order to make certain interrupts are occurring. Secondly it sets the
697 * bits needed to check for TX hangs. As a result we should immediately
698 * determine if a hang has occurred.
700 static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
702 /* If we're down or resetting, just bail */
703 if (test_bit(__FM10K_DOWN, interface->state) ||
704 test_bit(__FM10K_RESETTING, interface->state))
707 /* rate limit tx hang checks to only once every 2 seconds */
708 if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
710 interface->next_tx_hang_check = jiffies + (2 * HZ);
712 if (netif_carrier_ok(interface->netdev)) {
715 /* Force detection of hung controller */
716 for (i = 0; i < interface->num_tx_queues; i++)
717 set_check_for_tx_hang(interface->tx_ring[i]);
719 /* Rearm all in-use q_vectors for immediate firing */
720 for (i = 0; i < interface->num_q_vectors; i++) {
721 struct fm10k_q_vector *qv = interface->q_vector[i];
723 if (!qv->tx.count && !qv->rx.count)
725 writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
731 * fm10k_service_task - manages and runs subtasks
732 * @work: pointer to work_struct containing our data
734 static void fm10k_service_task(struct work_struct *work)
736 struct fm10k_intfc *interface;
738 interface = container_of(work, struct fm10k_intfc, service_task);
740 /* Check whether we're detached first */
741 fm10k_detach_subtask(interface);
743 /* tasks run even when interface is down */
744 fm10k_mbx_subtask(interface);
745 fm10k_reset_subtask(interface);
747 /* tasks only run when interface is up */
748 fm10k_watchdog_subtask(interface);
749 fm10k_check_hang_subtask(interface);
751 /* release lock on service events to allow scheduling next event */
752 fm10k_service_event_complete(interface);
756 * fm10k_macvlan_task - send queued MAC/VLAN requests to switch manager
757 * @work: pointer to work_struct containing our data
759 * This work item handles sending MAC/VLAN updates to the switch manager. When
760 * the interface is up, it will attempt to queue mailbox messages to the
761 * switch manager requesting updates for MAC/VLAN pairs. If the Tx fifo of the
762 * mailbox is full, it will reschedule itself to try again in a short while.
763 * This ensures that the driver does not overload the switch mailbox with too
764 * many simultaneous requests, causing an unnecessary reset.
766 static void fm10k_macvlan_task(struct work_struct *work)
768 struct fm10k_macvlan_request *item;
769 struct fm10k_intfc *interface;
770 struct delayed_work *dwork;
771 struct list_head *requests;
775 dwork = to_delayed_work(work);
776 interface = container_of(dwork, struct fm10k_intfc, macvlan_task);
778 requests = &interface->macvlan_requests;
781 /* Pop the first item off the list */
782 spin_lock_irqsave(&interface->macvlan_lock, flags);
783 item = list_first_entry_or_null(requests,
784 struct fm10k_macvlan_request,
787 list_del_init(&item->list);
789 spin_unlock_irqrestore(&interface->macvlan_lock, flags);
791 /* We have no more items to process */
795 fm10k_mbx_lock(interface);
797 /* Check that we have plenty of space to send the message. We
798 * want to ensure that the mailbox stays low enough to avoid a
799 * change in the host state, otherwise we may see spurious
800 * link up / link down notifications.
802 if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU + 5)) {
803 hw->mbx.ops.process(hw, &hw->mbx);
804 set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
805 fm10k_mbx_unlock(interface);
807 /* Put the request back on the list */
808 spin_lock_irqsave(&interface->macvlan_lock, flags);
809 list_add(&item->list, requests);
810 spin_unlock_irqrestore(&interface->macvlan_lock, flags);
814 switch (item->type) {
815 case FM10K_MC_MAC_REQUEST:
816 hw->mac.ops.update_mc_addr(hw,
822 case FM10K_UC_MAC_REQUEST:
823 hw->mac.ops.update_uc_addr(hw,
830 case FM10K_VLAN_REQUEST:
831 hw->mac.ops.update_vlan(hw,
840 fm10k_mbx_unlock(interface);
842 /* Free the item now that we've sent the update */
847 WARN_ON(!test_bit(__FM10K_MACVLAN_SCHED, interface->state));
849 /* flush memory to make sure state is correct */
850 smp_mb__before_atomic();
851 clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
853 /* If a MAC/VLAN request was scheduled since we started, we should
854 * re-schedule. However, there is no reason to re-schedule if there is
857 if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
858 fm10k_macvlan_schedule(interface);
862 * fm10k_configure_tx_ring - Configure Tx ring after Reset
863 * @interface: board private structure
864 * @ring: structure containing ring specific data
866 * Configure the Tx descriptor ring after a reset.
868 static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
869 struct fm10k_ring *ring)
871 struct fm10k_hw *hw = &interface->hw;
872 u64 tdba = ring->dma;
873 u32 size = ring->count * sizeof(struct fm10k_tx_desc);
874 u32 txint = FM10K_INT_MAP_DISABLE;
875 u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE;
876 u8 reg_idx = ring->reg_idx;
878 /* disable queue to avoid issues while updating state */
879 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
880 fm10k_write_flush(hw);
882 /* possible poll here to verify ring resources have been cleaned */
884 /* set location and size for descriptor ring */
885 fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
886 fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
887 fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
889 /* reset head and tail pointers */
890 fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
891 fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
893 /* store tail pointer */
894 ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
896 /* reset ntu and ntc to place SW in sync with hardware */
897 ring->next_to_clean = 0;
898 ring->next_to_use = 0;
901 if (ring->q_vector) {
902 txint = ring->q_vector->v_idx + NON_Q_VECTORS;
903 txint |= FM10K_INT_MAP_TIMER0;
906 fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
908 /* enable use of FTAG bit in Tx descriptor, register is RO for VF */
909 fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
910 FM10K_PFVTCTL_FTAG_DESC_ENABLE);
913 if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, ring->state) &&
915 netif_set_xps_queue(ring->netdev,
916 &ring->q_vector->affinity_mask,
920 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
924 * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
925 * @interface: board private structure
926 * @ring: structure containing ring specific data
928 * Verify the Tx descriptor ring is ready for transmit.
930 static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
931 struct fm10k_ring *ring)
933 struct fm10k_hw *hw = &interface->hw;
936 u8 reg_idx = ring->reg_idx;
938 /* if we are already enabled just exit */
939 if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
942 /* poll to verify queue is enabled */
944 usleep_range(1000, 2000);
945 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
946 } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
948 netif_err(interface, drv, interface->netdev,
949 "Could not enable Tx Queue %d\n", reg_idx);
953 * fm10k_configure_tx - Configure Transmit Unit after Reset
954 * @interface: board private structure
956 * Configure the Tx unit of the MAC after a reset.
958 static void fm10k_configure_tx(struct fm10k_intfc *interface)
962 /* Setup the HW Tx Head and Tail descriptor pointers */
963 for (i = 0; i < interface->num_tx_queues; i++)
964 fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
966 /* poll here to verify that Tx rings are now enabled */
967 for (i = 0; i < interface->num_tx_queues; i++)
968 fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
972 * fm10k_configure_rx_ring - Configure Rx ring after Reset
973 * @interface: board private structure
974 * @ring: structure containing ring specific data
976 * Configure the Rx descriptor ring after a reset.
978 static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
979 struct fm10k_ring *ring)
981 u64 rdba = ring->dma;
982 struct fm10k_hw *hw = &interface->hw;
983 u32 size = ring->count * sizeof(union fm10k_rx_desc);
984 u32 rxqctl, rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
985 u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
986 u32 rxint = FM10K_INT_MAP_DISABLE;
987 u8 rx_pause = interface->rx_pause;
988 u8 reg_idx = ring->reg_idx;
990 /* disable queue to avoid issues while updating state */
991 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
992 rxqctl &= ~FM10K_RXQCTL_ENABLE;
993 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
994 fm10k_write_flush(hw);
996 /* possible poll here to verify ring resources have been cleaned */
998 /* set location and size for descriptor ring */
999 fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1000 fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
1001 fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
1003 /* reset head and tail pointers */
1004 fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
1005 fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
1007 /* store tail pointer */
1008 ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
1010 /* reset ntu and ntc to place SW in sync with hardware */
1011 ring->next_to_clean = 0;
1012 ring->next_to_use = 0;
1013 ring->next_to_alloc = 0;
1015 /* Configure the Rx buffer size for one buff without split */
1016 srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
1018 /* Configure the Rx ring to suppress loopback packets */
1019 srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
1020 fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
1022 /* Enable drop on empty */
1024 if (interface->pfc_en)
1025 rx_pause = interface->pfc_en;
1027 if (!(rx_pause & BIT(ring->qos_pc)))
1028 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1030 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1032 /* assign default VLAN to queue */
1033 ring->vid = hw->mac.default_vid;
1035 /* if we have an active VLAN, disable default VLAN ID */
1036 if (test_bit(hw->mac.default_vid, interface->active_vlans))
1037 ring->vid |= FM10K_VLAN_CLEAR;
1040 if (ring->q_vector) {
1041 rxint = ring->q_vector->v_idx + NON_Q_VECTORS;
1042 rxint |= FM10K_INT_MAP_TIMER1;
1045 fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
1048 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
1049 rxqctl |= FM10K_RXQCTL_ENABLE;
1050 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
1052 /* place buffers on ring for receive data */
1053 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
1057 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
1058 * @interface: board private structure
1060 * Configure the drop enable bits for the Rx rings.
1062 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
1064 struct fm10k_hw *hw = &interface->hw;
1065 u8 rx_pause = interface->rx_pause;
1069 if (interface->pfc_en)
1070 rx_pause = interface->pfc_en;
1073 for (i = 0; i < interface->num_rx_queues; i++) {
1074 struct fm10k_ring *ring = interface->rx_ring[i];
1075 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1076 u8 reg_idx = ring->reg_idx;
1078 if (!(rx_pause & BIT(ring->qos_pc)))
1079 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1081 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1086 * fm10k_configure_dglort - Configure Receive DGLORT after reset
1087 * @interface: board private structure
1089 * Configure the DGLORT description and RSS tables.
1091 static void fm10k_configure_dglort(struct fm10k_intfc *interface)
1093 struct fm10k_dglort_cfg dglort = { 0 };
1094 struct fm10k_hw *hw = &interface->hw;
1098 /* Fill out hash function seeds */
1099 for (i = 0; i < FM10K_RSSRK_SIZE; i++)
1100 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
1102 /* Write RETA table to hardware */
1103 for (i = 0; i < FM10K_RETA_SIZE; i++)
1104 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
1106 /* Generate RSS hash based on packet types, TCP/UDP
1107 * port numbers and/or IPv4/v6 src and dst addresses
1109 mrqc = FM10K_MRQC_IPV4 |
1110 FM10K_MRQC_TCP_IPV4 |
1112 FM10K_MRQC_TCP_IPV6;
1114 if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP, interface->flags))
1115 mrqc |= FM10K_MRQC_UDP_IPV4;
1116 if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP, interface->flags))
1117 mrqc |= FM10K_MRQC_UDP_IPV6;
1119 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
1121 /* configure default DGLORT mapping for RSS/DCB */
1122 dglort.inner_rss = 1;
1123 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1124 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1125 hw->mac.ops.configure_dglort_map(hw, &dglort);
1127 /* assign GLORT per queue for queue mapped testing */
1128 if (interface->glort_count > 64) {
1129 memset(&dglort, 0, sizeof(dglort));
1130 dglort.inner_rss = 1;
1131 dglort.glort = interface->glort + 64;
1132 dglort.idx = fm10k_dglort_pf_queue;
1133 dglort.queue_l = fls(interface->num_rx_queues - 1);
1134 hw->mac.ops.configure_dglort_map(hw, &dglort);
1137 /* assign glort value for RSS/DCB specific to this interface */
1138 memset(&dglort, 0, sizeof(dglort));
1139 dglort.inner_rss = 1;
1140 dglort.glort = interface->glort;
1141 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1142 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1143 /* configure DGLORT mapping for RSS/DCB */
1144 dglort.idx = fm10k_dglort_pf_rss;
1145 if (interface->l2_accel)
1146 dglort.shared_l = fls(interface->l2_accel->size);
1147 hw->mac.ops.configure_dglort_map(hw, &dglort);
1151 * fm10k_configure_rx - Configure Receive Unit after Reset
1152 * @interface: board private structure
1154 * Configure the Rx unit of the MAC after a reset.
1156 static void fm10k_configure_rx(struct fm10k_intfc *interface)
1160 /* Configure SWPRI to PC map */
1161 fm10k_configure_swpri_map(interface);
1163 /* Configure RSS and DGLORT map */
1164 fm10k_configure_dglort(interface);
1166 /* Setup the HW Rx Head and Tail descriptor pointers */
1167 for (i = 0; i < interface->num_rx_queues; i++)
1168 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
1170 /* possible poll here to verify that Rx rings are now enabled */
1173 static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
1175 struct fm10k_q_vector *q_vector;
1178 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1179 q_vector = interface->q_vector[q_idx];
1180 napi_enable(&q_vector->napi);
1184 static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
1186 struct fm10k_q_vector *q_vector = data;
1188 if (q_vector->rx.count || q_vector->tx.count)
1189 napi_schedule_irqoff(&q_vector->napi);
1194 static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
1196 struct fm10k_intfc *interface = data;
1197 struct fm10k_hw *hw = &interface->hw;
1198 struct fm10k_mbx_info *mbx = &hw->mbx;
1200 /* re-enable mailbox interrupt and indicate 20us delay */
1201 fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
1202 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1205 /* service upstream mailbox */
1206 if (fm10k_mbx_trylock(interface)) {
1207 mbx->ops.process(hw, mbx);
1208 fm10k_mbx_unlock(interface);
1211 hw->mac.get_host_state = true;
1212 fm10k_service_event_schedule(interface);
1217 #define FM10K_ERR_MSG(type) case (type): error = #type; break
1218 static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
1219 struct fm10k_fault *fault)
1221 struct pci_dev *pdev = interface->pdev;
1222 struct fm10k_hw *hw = &interface->hw;
1223 struct fm10k_iov_data *iov_data = interface->iov_data;
1227 case FM10K_PCA_FAULT:
1228 switch (fault->type) {
1230 error = "Unknown PCA error";
1232 FM10K_ERR_MSG(PCA_NO_FAULT);
1233 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
1234 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
1235 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
1236 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
1237 FM10K_ERR_MSG(PCA_POISONED_TLP);
1238 FM10K_ERR_MSG(PCA_TLP_ABORT);
1241 case FM10K_THI_FAULT:
1242 switch (fault->type) {
1244 error = "Unknown THI error";
1246 FM10K_ERR_MSG(THI_NO_FAULT);
1247 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1250 case FM10K_FUM_FAULT:
1251 switch (fault->type) {
1253 error = "Unknown FUM error";
1255 FM10K_ERR_MSG(FUM_NO_FAULT);
1256 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
1257 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
1258 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
1259 FM10K_ERR_MSG(FUM_RO_ERROR);
1260 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
1261 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
1262 FM10K_ERR_MSG(FUM_INVALID_TYPE);
1263 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
1264 FM10K_ERR_MSG(FUM_INVALID_BE);
1265 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
1269 error = "Undocumented fault";
1273 dev_warn(&pdev->dev,
1274 "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
1275 error, fault->address, fault->specinfo,
1276 PCI_SLOT(fault->func), PCI_FUNC(fault->func));
1278 /* For VF faults, clear out the respective LPORT, reset the queue
1279 * resources, and then reconnect to the mailbox. This allows the
1280 * VF in question to resume behavior. For transient faults that are
1281 * the result of non-malicious behavior this will log the fault and
1282 * allow the VF to resume functionality. Obviously for malicious VFs
1283 * they will be able to attempt malicious behavior again. In this
1284 * case, the system administrator will need to step in and manually
1285 * remove or disable the VF in question.
1287 if (fault->func && iov_data) {
1288 int vf = fault->func - 1;
1289 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1291 hw->iov.ops.reset_lport(hw, vf_info);
1292 hw->iov.ops.reset_resources(hw, vf_info);
1294 /* reset_lport disables the VF, so re-enable it */
1295 hw->iov.ops.set_lport(hw, vf_info, vf,
1296 FM10K_VF_FLAG_MULTI_CAPABLE);
1298 /* reset_resources will disconnect from the mbx */
1299 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1303 static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1305 struct fm10k_hw *hw = &interface->hw;
1306 struct fm10k_fault fault = { 0 };
1309 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1311 eicr >>= 1, type += FM10K_FAULT_SIZE) {
1312 /* only check if there is an error reported */
1316 /* retrieve fault info */
1317 err = hw->mac.ops.get_fault(hw, type, &fault);
1319 dev_err(&interface->pdev->dev,
1320 "error reading fault\n");
1324 fm10k_handle_fault(interface, type, &fault);
1328 static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1330 struct fm10k_hw *hw = &interface->hw;
1331 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1335 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1338 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1340 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1342 if (maxholdq & BIT(31)) {
1343 if (q < FM10K_MAX_QUEUES_PF) {
1344 interface->rx_overrun_pf++;
1345 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
1347 interface->rx_overrun_vf++;
1361 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1363 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1367 static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1369 struct fm10k_intfc *interface = data;
1370 struct fm10k_hw *hw = &interface->hw;
1371 struct fm10k_mbx_info *mbx = &hw->mbx;
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));
1380 /* report any faults found to the message log */
1381 fm10k_report_fault(interface, eicr);
1383 /* reset any queues disabled due to receiver overrun */
1384 fm10k_reset_drop_on_empty(interface, eicr);
1386 /* service mailboxes */
1387 if (fm10k_mbx_trylock(interface)) {
1388 s32 err = mbx->ops.process(hw, mbx);
1390 if (err == FM10K_ERR_RESET_REQUESTED)
1391 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1393 /* handle VFLRE events */
1394 fm10k_iov_event(interface);
1395 fm10k_mbx_unlock(interface);
1398 /* if switch toggled state we should reset GLORTs */
1399 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1400 /* force link down for at least 4 seconds */
1401 interface->link_down_event = jiffies + (4 * HZ);
1402 set_bit(__FM10K_LINK_DOWN, interface->state);
1404 /* reset dglort_map back to no config */
1405 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1408 /* we should validate host state after interrupt event */
1409 hw->mac.get_host_state = true;
1411 /* validate host state, and handle VF mailboxes in the service task */
1412 fm10k_service_event_schedule(interface);
1414 /* re-enable mailbox interrupt and indicate 20us delay */
1415 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1416 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1422 void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1424 struct fm10k_hw *hw = &interface->hw;
1425 struct msix_entry *entry;
1428 /* no mailbox IRQ to free if MSI-X is not enabled */
1429 if (!interface->msix_entries)
1432 entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1434 /* disconnect the mailbox */
1435 hw->mbx.ops.disconnect(hw, &hw->mbx);
1437 /* disable Mailbox cause */
1438 if (hw->mac.type == fm10k_mac_pf) {
1439 fm10k_write_reg(hw, FM10K_EIMR,
1440 FM10K_EIMR_DISABLE(PCA_FAULT) |
1441 FM10K_EIMR_DISABLE(FUM_FAULT) |
1442 FM10K_EIMR_DISABLE(MAILBOX) |
1443 FM10K_EIMR_DISABLE(SWITCHREADY) |
1444 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1445 FM10K_EIMR_DISABLE(SRAMERROR) |
1446 FM10K_EIMR_DISABLE(VFLR) |
1447 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1448 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1450 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1453 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1455 free_irq(entry->vector, interface);
1458 static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1459 struct fm10k_mbx_info *mbx)
1461 bool vlan_override = hw->mac.vlan_override;
1462 u16 default_vid = hw->mac.default_vid;
1463 struct fm10k_intfc *interface;
1466 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1470 interface = container_of(hw, struct fm10k_intfc, hw);
1472 /* MAC was changed so we need reset */
1473 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1474 !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1475 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1477 /* VLAN override was changed, or default VLAN changed */
1478 if ((vlan_override != hw->mac.vlan_override) ||
1479 (default_vid != hw->mac.default_vid))
1480 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1485 /* generic error handler for mailbox issues */
1486 static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1487 struct fm10k_mbx_info __always_unused *mbx)
1489 struct fm10k_intfc *interface;
1490 struct pci_dev *pdev;
1492 interface = container_of(hw, struct fm10k_intfc, hw);
1493 pdev = interface->pdev;
1495 dev_err(&pdev->dev, "Unknown message ID %u\n",
1496 **results & FM10K_TLV_ID_MASK);
1501 static const struct fm10k_msg_data vf_mbx_data[] = {
1502 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1503 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1504 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1505 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1508 static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1510 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1511 struct net_device *dev = interface->netdev;
1512 struct fm10k_hw *hw = &interface->hw;
1515 /* Use timer0 for interrupt moderation on the mailbox */
1516 u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1518 /* register mailbox handlers */
1519 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1523 /* request the IRQ */
1524 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1525 dev->name, interface);
1527 netif_err(interface, probe, dev,
1528 "request_irq for msix_mbx failed: %d\n", err);
1532 /* map all of the interrupt sources */
1533 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1535 /* enable interrupt */
1536 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1541 static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1542 struct fm10k_mbx_info *mbx)
1544 struct fm10k_intfc *interface;
1545 u32 dglort_map = hw->mac.dglort_map;
1548 interface = container_of(hw, struct fm10k_intfc, hw);
1550 err = fm10k_msg_err_pf(hw, results, mbx);
1551 if (!err && hw->swapi.status) {
1552 /* force link down for a reasonable delay */
1553 interface->link_down_event = jiffies + (2 * HZ);
1554 set_bit(__FM10K_LINK_DOWN, interface->state);
1556 /* reset dglort_map back to no config */
1557 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1559 fm10k_service_event_schedule(interface);
1561 /* prevent overloading kernel message buffer */
1562 if (interface->lport_map_failed)
1565 interface->lport_map_failed = true;
1567 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1568 dev_warn(&interface->pdev->dev,
1569 "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1570 dev_warn(&interface->pdev->dev,
1571 "request logical port map failed: %d\n",
1577 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1581 interface->lport_map_failed = false;
1583 /* we need to reset if port count was just updated */
1584 if (dglort_map != hw->mac.dglort_map)
1585 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1590 static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1591 struct fm10k_mbx_info __always_unused *mbx)
1593 struct fm10k_intfc *interface;
1598 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1603 /* extract values from the pvid update */
1604 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1605 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1607 /* if glort is not valid return error */
1608 if (!fm10k_glort_valid_pf(hw, glort))
1609 return FM10K_ERR_PARAM;
1611 /* verify VLAN ID is valid */
1612 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1613 return FM10K_ERR_PARAM;
1615 interface = container_of(hw, struct fm10k_intfc, hw);
1617 /* check to see if this belongs to one of the VFs */
1618 err = fm10k_iov_update_pvid(interface, glort, pvid);
1622 /* we need to reset if default VLAN was just updated */
1623 if (pvid != hw->mac.default_vid)
1624 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1626 hw->mac.default_vid = pvid;
1631 static const struct fm10k_msg_data pf_mbx_data[] = {
1632 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1633 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1634 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1635 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1636 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1637 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1638 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1641 static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1643 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1644 struct net_device *dev = interface->netdev;
1645 struct fm10k_hw *hw = &interface->hw;
1648 /* Use timer0 for interrupt moderation on the mailbox */
1649 u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1650 u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1652 /* register mailbox handlers */
1653 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1657 /* request the IRQ */
1658 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1659 dev->name, interface);
1661 netif_err(interface, probe, dev,
1662 "request_irq for msix_mbx failed: %d\n", err);
1666 /* Enable interrupts w/ no moderation for "other" interrupts */
1667 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1668 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1669 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1670 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1671 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1673 /* Enable interrupts w/ moderation for mailbox */
1674 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1676 /* Enable individual interrupt causes */
1677 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1678 FM10K_EIMR_ENABLE(FUM_FAULT) |
1679 FM10K_EIMR_ENABLE(MAILBOX) |
1680 FM10K_EIMR_ENABLE(SWITCHREADY) |
1681 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1682 FM10K_EIMR_ENABLE(SRAMERROR) |
1683 FM10K_EIMR_ENABLE(VFLR) |
1684 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1686 /* enable interrupt */
1687 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1692 int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1694 struct fm10k_hw *hw = &interface->hw;
1697 /* enable Mailbox cause */
1698 if (hw->mac.type == fm10k_mac_pf)
1699 err = fm10k_mbx_request_irq_pf(interface);
1701 err = fm10k_mbx_request_irq_vf(interface);
1705 /* connect mailbox */
1706 err = hw->mbx.ops.connect(hw, &hw->mbx);
1708 /* if the mailbox failed to connect, then free IRQ */
1710 fm10k_mbx_free_irq(interface);
1716 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1717 * @interface: board private structure
1719 * Release all interrupts associated with this interface
1721 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1723 int vector = interface->num_q_vectors;
1724 struct msix_entry *entry;
1726 entry = &interface->msix_entries[NON_Q_VECTORS + vector];
1729 struct fm10k_q_vector *q_vector;
1733 q_vector = interface->q_vector[vector];
1735 if (!q_vector->tx.count && !q_vector->rx.count)
1738 /* clear the affinity_mask in the IRQ descriptor */
1739 irq_set_affinity_hint(entry->vector, NULL);
1741 /* disable interrupts */
1742 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1744 free_irq(entry->vector, q_vector);
1749 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1750 * @interface: board private structure
1752 * Attempts to configure interrupts using the best available
1753 * capabilities of the hardware and kernel.
1755 int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1757 struct net_device *dev = interface->netdev;
1758 struct fm10k_hw *hw = &interface->hw;
1759 struct msix_entry *entry;
1760 unsigned int ri = 0, ti = 0;
1763 entry = &interface->msix_entries[NON_Q_VECTORS];
1765 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1766 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1768 /* name the vector */
1769 if (q_vector->tx.count && q_vector->rx.count) {
1770 snprintf(q_vector->name, sizeof(q_vector->name),
1771 "%s-TxRx-%u", dev->name, ri++);
1773 } else if (q_vector->rx.count) {
1774 snprintf(q_vector->name, sizeof(q_vector->name),
1775 "%s-rx-%u", dev->name, ri++);
1776 } else if (q_vector->tx.count) {
1777 snprintf(q_vector->name, sizeof(q_vector->name),
1778 "%s-tx-%u", dev->name, ti++);
1780 /* skip this unused q_vector */
1784 /* Assign ITR register to q_vector */
1785 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1786 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1787 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1789 /* request the IRQ */
1790 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1791 q_vector->name, q_vector);
1793 netif_err(interface, probe, dev,
1794 "request_irq failed for MSIX interrupt Error: %d\n",
1799 /* assign the mask for this irq */
1800 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1802 /* Enable q_vector */
1803 writel(FM10K_ITR_ENABLE, q_vector->itr);
1811 /* wind through the ring freeing all entries and vectors */
1813 struct fm10k_q_vector *q_vector;
1817 q_vector = interface->q_vector[vector];
1819 if (!q_vector->tx.count && !q_vector->rx.count)
1822 /* clear the affinity_mask in the IRQ descriptor */
1823 irq_set_affinity_hint(entry->vector, NULL);
1825 /* disable interrupts */
1826 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1828 free_irq(entry->vector, q_vector);
1834 void fm10k_up(struct fm10k_intfc *interface)
1836 struct fm10k_hw *hw = &interface->hw;
1838 /* Enable Tx/Rx DMA */
1839 hw->mac.ops.start_hw(hw);
1841 /* configure Tx descriptor rings */
1842 fm10k_configure_tx(interface);
1844 /* configure Rx descriptor rings */
1845 fm10k_configure_rx(interface);
1847 /* configure interrupts */
1848 hw->mac.ops.update_int_moderator(hw);
1850 /* enable statistics capture again */
1851 clear_bit(__FM10K_UPDATING_STATS, interface->state);
1853 /* clear down bit to indicate we are ready to go */
1854 clear_bit(__FM10K_DOWN, interface->state);
1856 /* enable polling cleanups */
1857 fm10k_napi_enable_all(interface);
1859 /* re-establish Rx filters */
1860 fm10k_restore_rx_state(interface);
1862 /* enable transmits */
1863 netif_tx_start_all_queues(interface->netdev);
1865 /* kick off the service timer now */
1866 hw->mac.get_host_state = true;
1867 mod_timer(&interface->service_timer, jiffies);
1870 static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1872 struct fm10k_q_vector *q_vector;
1875 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1876 q_vector = interface->q_vector[q_idx];
1877 napi_disable(&q_vector->napi);
1881 void fm10k_down(struct fm10k_intfc *interface)
1883 struct net_device *netdev = interface->netdev;
1884 struct fm10k_hw *hw = &interface->hw;
1885 int err, i = 0, count = 0;
1887 /* signal that we are down to the interrupt handler and service task */
1888 if (test_and_set_bit(__FM10K_DOWN, interface->state))
1891 /* call carrier off first to avoid false dev_watchdog timeouts */
1892 netif_carrier_off(netdev);
1894 /* disable transmits */
1895 netif_tx_stop_all_queues(netdev);
1896 netif_tx_disable(netdev);
1898 /* reset Rx filters */
1899 fm10k_reset_rx_state(interface);
1901 /* disable polling routines */
1902 fm10k_napi_disable_all(interface);
1904 /* capture stats one last time before stopping interface */
1905 fm10k_update_stats(interface);
1907 /* prevent updating statistics while we're down */
1908 while (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
1909 usleep_range(1000, 2000);
1911 /* skip waiting for TX DMA if we lost PCIe link */
1912 if (FM10K_REMOVED(hw->hw_addr))
1913 goto skip_tx_dma_drain;
1915 /* In some rare circumstances it can take a while for Tx queues to
1916 * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1917 * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1918 * until the Tx queues have emptied, or until a number of retries. If
1919 * we fail to clear within the retry loop, we will issue a warning
1920 * indicating that Tx DMA is probably hung. Note this means we call
1921 * .stop_hw() twice but this shouldn't cause any problems.
1923 err = hw->mac.ops.stop_hw(hw);
1924 if (err != FM10K_ERR_REQUESTS_PENDING)
1925 goto skip_tx_dma_drain;
1927 #define TX_DMA_DRAIN_RETRIES 25
1928 for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1929 usleep_range(10000, 20000);
1931 /* start checking at the last ring to have pending Tx */
1932 for (; i < interface->num_tx_queues; i++)
1933 if (fm10k_get_tx_pending(interface->tx_ring[i], false))
1936 /* if all the queues are drained, we can break now */
1937 if (i == interface->num_tx_queues)
1941 if (count >= TX_DMA_DRAIN_RETRIES)
1942 dev_err(&interface->pdev->dev,
1943 "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1946 /* Disable DMA engine for Tx/Rx */
1947 err = hw->mac.ops.stop_hw(hw);
1948 if (err == FM10K_ERR_REQUESTS_PENDING)
1949 dev_err(&interface->pdev->dev,
1950 "due to pending requests hw was not shut down gracefully\n");
1952 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1954 /* free any buffers still on the rings */
1955 fm10k_clean_all_tx_rings(interface);
1956 fm10k_clean_all_rx_rings(interface);
1960 * fm10k_sw_init - Initialize general software structures
1961 * @interface: host interface private structure to initialize
1962 * @ent: PCI device ID entry
1964 * fm10k_sw_init initializes the interface private data structure.
1965 * Fields are initialized based on PCI device information and
1966 * OS network device settings (MTU size).
1968 static int fm10k_sw_init(struct fm10k_intfc *interface,
1969 const struct pci_device_id *ent)
1971 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1972 struct fm10k_hw *hw = &interface->hw;
1973 struct pci_dev *pdev = interface->pdev;
1974 struct net_device *netdev = interface->netdev;
1975 u32 rss_key[FM10K_RSSRK_SIZE];
1979 /* initialize back pointer */
1980 hw->back = interface;
1981 hw->hw_addr = interface->uc_addr;
1983 /* PCI config space info */
1984 hw->vendor_id = pdev->vendor;
1985 hw->device_id = pdev->device;
1986 hw->revision_id = pdev->revision;
1987 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1988 hw->subsystem_device_id = pdev->subsystem_device;
1991 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1992 hw->mac.type = fi->mac;
1994 /* Setup IOV handlers */
1996 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1998 /* Set common capability flags and settings */
1999 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
2000 interface->ring_feature[RING_F_RSS].limit = rss;
2001 fi->get_invariants(hw);
2003 /* pick up the PCIe bus settings for reporting later */
2004 if (hw->mac.ops.get_bus_info)
2005 hw->mac.ops.get_bus_info(hw);
2007 /* limit the usable DMA range */
2008 if (hw->mac.ops.set_dma_mask)
2009 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
2011 /* update netdev with DMA restrictions */
2012 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
2013 netdev->features |= NETIF_F_HIGHDMA;
2014 netdev->vlan_features |= NETIF_F_HIGHDMA;
2017 /* reset and initialize the hardware so it is in a known state */
2018 err = hw->mac.ops.reset_hw(hw);
2020 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
2024 err = hw->mac.ops.init_hw(hw);
2026 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
2030 /* initialize hardware statistics */
2031 hw->mac.ops.update_hw_stats(hw, &interface->stats);
2033 /* Set upper limit on IOV VFs that can be allocated */
2034 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
2036 /* Start with random Ethernet address */
2037 eth_random_addr(hw->mac.addr);
2039 /* Initialize MAC address from hardware */
2040 err = hw->mac.ops.read_mac_addr(hw);
2042 dev_warn(&pdev->dev,
2043 "Failed to obtain MAC address defaulting to random\n");
2044 /* tag address assignment as random */
2045 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2048 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
2049 ether_addr_copy(netdev->perm_addr, hw->mac.addr);
2051 if (!is_valid_ether_addr(netdev->perm_addr)) {
2052 dev_err(&pdev->dev, "Invalid MAC Address\n");
2056 /* initialize DCBNL interface */
2057 fm10k_dcbnl_set_ops(netdev);
2059 /* set default ring sizes */
2060 interface->tx_ring_count = FM10K_DEFAULT_TXD;
2061 interface->rx_ring_count = FM10K_DEFAULT_RXD;
2063 /* set default interrupt moderation */
2064 interface->tx_itr = FM10K_TX_ITR_DEFAULT;
2065 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
2067 /* Initialize the MAC/VLAN queue */
2068 INIT_LIST_HEAD(&interface->macvlan_requests);
2070 netdev_rss_key_fill(rss_key, sizeof(rss_key));
2071 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
2073 /* Initialize the mailbox lock */
2074 spin_lock_init(&interface->mbx_lock);
2075 spin_lock_init(&interface->macvlan_lock);
2077 /* Start off interface as being down */
2078 set_bit(__FM10K_DOWN, interface->state);
2079 set_bit(__FM10K_UPDATING_STATS, interface->state);
2085 * fm10k_probe - Device Initialization Routine
2086 * @pdev: PCI device information struct
2087 * @ent: entry in fm10k_pci_tbl
2089 * Returns 0 on success, negative on failure
2091 * fm10k_probe initializes an interface identified by a pci_dev structure.
2092 * The OS initialization, configuring of the interface private structure,
2093 * and a hardware reset occur.
2095 static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2097 struct net_device *netdev;
2098 struct fm10k_intfc *interface;
2101 if (pdev->error_state != pci_channel_io_normal) {
2103 "PCI device still in an error state. Unable to load...\n");
2107 err = pci_enable_device_mem(pdev);
2110 "PCI enable device failed: %d\n", err);
2114 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
2116 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2119 "DMA configuration failed: %d\n", err);
2123 err = pci_request_mem_regions(pdev, fm10k_driver_name);
2126 "pci_request_selected_regions failed: %d\n", err);
2130 pci_enable_pcie_error_reporting(pdev);
2132 pci_set_master(pdev);
2133 pci_save_state(pdev);
2135 netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
2138 goto err_alloc_netdev;
2141 SET_NETDEV_DEV(netdev, &pdev->dev);
2143 interface = netdev_priv(netdev);
2144 pci_set_drvdata(pdev, interface);
2146 interface->netdev = netdev;
2147 interface->pdev = pdev;
2149 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
2150 FM10K_UC_ADDR_SIZE);
2151 if (!interface->uc_addr) {
2156 err = fm10k_sw_init(interface, ent);
2160 /* enable debugfs support */
2161 fm10k_dbg_intfc_init(interface);
2163 err = fm10k_init_queueing_scheme(interface);
2167 /* the mbx interrupt might attempt to schedule the service task, so we
2168 * must ensure it is disabled since we haven't yet requested the timer
2171 set_bit(__FM10K_SERVICE_DISABLE, interface->state);
2173 err = fm10k_mbx_request_irq(interface);
2175 goto err_mbx_interrupt;
2177 /* final check of hardware state before registering the interface */
2178 err = fm10k_hw_ready(interface);
2182 err = register_netdev(netdev);
2186 /* carrier off reporting is important to ethtool even BEFORE open */
2187 netif_carrier_off(netdev);
2189 /* stop all the transmit queues from transmitting until link is up */
2190 netif_tx_stop_all_queues(netdev);
2192 /* Initialize service timer and service task late in order to avoid
2195 timer_setup(&interface->service_timer, fm10k_service_timer, 0);
2196 INIT_WORK(&interface->service_task, fm10k_service_task);
2198 /* Setup the MAC/VLAN queue */
2199 INIT_DELAYED_WORK(&interface->macvlan_task, fm10k_macvlan_task);
2201 /* kick off service timer now, even when interface is down */
2202 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2204 /* print warning for non-optimal configurations */
2205 pcie_print_link_status(interface->pdev);
2207 /* report MAC address for logging */
2208 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2210 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2211 fm10k_iov_configure(pdev, 0);
2213 /* clear the service task disable bit and kick off service task */
2214 clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
2215 fm10k_service_event_schedule(interface);
2220 fm10k_mbx_free_irq(interface);
2222 fm10k_clear_queueing_scheme(interface);
2224 if (interface->sw_addr)
2225 iounmap(interface->sw_addr);
2226 iounmap(interface->uc_addr);
2228 free_netdev(netdev);
2230 pci_release_mem_regions(pdev);
2233 pci_disable_device(pdev);
2238 * fm10k_remove - Device Removal Routine
2239 * @pdev: PCI device information struct
2241 * fm10k_remove is called by the PCI subsystem to alert the driver
2242 * that it should release a PCI device. The could be caused by a
2243 * Hot-Plug event, or because the driver is going to be removed from
2246 static void fm10k_remove(struct pci_dev *pdev)
2248 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2249 struct net_device *netdev = interface->netdev;
2251 del_timer_sync(&interface->service_timer);
2253 fm10k_stop_service_event(interface);
2254 fm10k_stop_macvlan_task(interface);
2256 /* Remove all pending MAC/VLAN requests */
2257 fm10k_clear_macvlan_queue(interface, interface->glort, true);
2259 /* free netdev, this may bounce the interrupts due to setup_tc */
2260 if (netdev->reg_state == NETREG_REGISTERED)
2261 unregister_netdev(netdev);
2264 fm10k_iov_disable(pdev);
2266 /* disable mailbox interrupt */
2267 fm10k_mbx_free_irq(interface);
2269 /* free interrupts */
2270 fm10k_clear_queueing_scheme(interface);
2272 /* remove any debugfs interfaces */
2273 fm10k_dbg_intfc_exit(interface);
2275 if (interface->sw_addr)
2276 iounmap(interface->sw_addr);
2277 iounmap(interface->uc_addr);
2279 free_netdev(netdev);
2281 pci_release_mem_regions(pdev);
2283 pci_disable_pcie_error_reporting(pdev);
2285 pci_disable_device(pdev);
2288 static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2290 /* the watchdog task reads from registers, which might appear like
2291 * a surprise remove if the PCIe device is disabled while we're
2292 * stopped. We stop the watchdog task until after we resume software
2295 * Note that the MAC/VLAN task will be stopped as part of preparing
2296 * for reset so we don't need to handle it here.
2298 fm10k_stop_service_event(interface);
2300 if (fm10k_prepare_for_reset(interface))
2301 set_bit(__FM10K_RESET_SUSPENDED, interface->state);
2304 static int fm10k_handle_resume(struct fm10k_intfc *interface)
2306 struct fm10k_hw *hw = &interface->hw;
2309 /* Even if we didn't properly prepare for reset in
2310 * fm10k_prepare_suspend, we'll attempt to resume anyways.
2312 if (!test_and_clear_bit(__FM10K_RESET_SUSPENDED, interface->state))
2313 dev_warn(&interface->pdev->dev,
2314 "Device was shut down as part of suspend... Attempting to recover\n");
2316 /* reset statistics starting values */
2317 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2319 err = fm10k_handle_reset(interface);
2323 /* assume host is not ready, to prevent race with watchdog in case we
2324 * actually don't have connection to the switch
2326 interface->host_ready = false;
2327 fm10k_watchdog_host_not_ready(interface);
2329 /* force link to stay down for a second to prevent link flutter */
2330 interface->link_down_event = jiffies + (HZ);
2331 set_bit(__FM10K_LINK_DOWN, interface->state);
2333 /* restart the service task */
2334 fm10k_start_service_event(interface);
2336 /* Restart the MAC/VLAN request queue in-case of outstanding events */
2337 fm10k_macvlan_schedule(interface);
2343 * fm10k_resume - Generic PM resume hook
2344 * @dev: generic device structure
2346 * Generic PM hook used when waking the device from a low power state after
2347 * suspend or hibernation. This function does not need to handle lower PCIe
2348 * device state as the stack takes care of that for us.
2350 static int __maybe_unused fm10k_resume(struct device *dev)
2352 struct fm10k_intfc *interface = dev_get_drvdata(dev);
2353 struct net_device *netdev = interface->netdev;
2354 struct fm10k_hw *hw = &interface->hw;
2357 /* refresh hw_addr in case it was dropped */
2358 hw->hw_addr = interface->uc_addr;
2360 err = fm10k_handle_resume(interface);
2364 netif_device_attach(netdev);
2370 * fm10k_suspend - Generic PM suspend hook
2371 * @dev: generic device structure
2373 * Generic PM hook used when setting the device into a low power state for
2374 * system suspend or hibernation. This function does not need to handle lower
2375 * PCIe device state as the stack takes care of that for us.
2377 static int __maybe_unused fm10k_suspend(struct device *dev)
2379 struct fm10k_intfc *interface = dev_get_drvdata(dev);
2380 struct net_device *netdev = interface->netdev;
2382 netif_device_detach(netdev);
2384 fm10k_prepare_suspend(interface);
2390 * fm10k_io_error_detected - called when PCI error is detected
2391 * @pdev: Pointer to PCI device
2392 * @state: The current pci connection state
2394 * This function is called after a PCI bus error affecting
2395 * this device has been detected.
2397 static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2398 pci_channel_state_t state)
2400 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2401 struct net_device *netdev = interface->netdev;
2403 netif_device_detach(netdev);
2405 if (state == pci_channel_io_perm_failure)
2406 return PCI_ERS_RESULT_DISCONNECT;
2408 fm10k_prepare_suspend(interface);
2410 /* Request a slot reset. */
2411 return PCI_ERS_RESULT_NEED_RESET;
2415 * fm10k_io_slot_reset - called after the pci bus has been reset.
2416 * @pdev: Pointer to PCI device
2418 * Restart the card from scratch, as if from a cold-boot.
2420 static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2422 pci_ers_result_t result;
2424 if (pci_reenable_device(pdev)) {
2426 "Cannot re-enable PCI device after reset.\n");
2427 result = PCI_ERS_RESULT_DISCONNECT;
2429 pci_set_master(pdev);
2430 pci_restore_state(pdev);
2432 /* After second error pci->state_saved is false, this
2433 * resets it so EEH doesn't break.
2435 pci_save_state(pdev);
2437 pci_wake_from_d3(pdev, false);
2439 result = PCI_ERS_RESULT_RECOVERED;
2446 * fm10k_io_resume - called when traffic can start flowing again.
2447 * @pdev: Pointer to PCI device
2449 * This callback is called when the error recovery driver tells us that
2450 * its OK to resume normal operation.
2452 static void fm10k_io_resume(struct pci_dev *pdev)
2454 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2455 struct net_device *netdev = interface->netdev;
2458 err = fm10k_handle_resume(interface);
2461 dev_warn(&pdev->dev,
2462 "%s failed: %d\n", __func__, err);
2464 netif_device_attach(netdev);
2468 * fm10k_io_reset_prepare - called when PCI function is about to be reset
2469 * @pdev: Pointer to PCI device
2471 * This callback is called when the PCI function is about to be reset,
2472 * allowing the device driver to prepare for it.
2474 static void fm10k_io_reset_prepare(struct pci_dev *pdev)
2476 /* warn incase we have any active VF devices */
2477 if (pci_num_vf(pdev))
2478 dev_warn(&pdev->dev,
2479 "PCIe FLR may cause issues for any active VF devices\n");
2480 fm10k_prepare_suspend(pci_get_drvdata(pdev));
2484 * fm10k_io_reset_done - called when PCI function has finished resetting
2485 * @pdev: Pointer to PCI device
2487 * This callback is called just after the PCI function is reset, such as via
2488 * /sys/class/net/<enpX>/device/reset or similar.
2490 static void fm10k_io_reset_done(struct pci_dev *pdev)
2492 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2493 int err = fm10k_handle_resume(interface);
2496 dev_warn(&pdev->dev,
2497 "%s failed: %d\n", __func__, err);
2498 netif_device_detach(interface->netdev);
2502 static const struct pci_error_handlers fm10k_err_handler = {
2503 .error_detected = fm10k_io_error_detected,
2504 .slot_reset = fm10k_io_slot_reset,
2505 .resume = fm10k_io_resume,
2506 .reset_prepare = fm10k_io_reset_prepare,
2507 .reset_done = fm10k_io_reset_done,
2510 static SIMPLE_DEV_PM_OPS(fm10k_pm_ops, fm10k_suspend, fm10k_resume);
2512 static struct pci_driver fm10k_driver = {
2513 .name = fm10k_driver_name,
2514 .id_table = fm10k_pci_tbl,
2515 .probe = fm10k_probe,
2516 .remove = fm10k_remove,
2518 .pm = &fm10k_pm_ops,
2520 .sriov_configure = fm10k_iov_configure,
2521 .err_handler = &fm10k_err_handler
2525 * fm10k_register_pci_driver - register driver interface
2527 * This function is called on module load in order to register the driver.
2529 int fm10k_register_pci_driver(void)
2531 return pci_register_driver(&fm10k_driver);
2535 * fm10k_unregister_pci_driver - unregister driver interface
2537 * This function is called on module unload in order to remove the driver.
2539 void fm10k_unregister_pci_driver(void)
2541 pci_unregister_driver(&fm10k_driver);