1 /* Intel(R) Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2016 Intel Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
16 * Contact Information:
17 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
18 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
21 #include <linux/module.h>
22 #include <linux/aer.h>
26 static const struct fm10k_info *fm10k_info_tbl[] = {
27 [fm10k_device_pf] = &fm10k_pf_info,
28 [fm10k_device_vf] = &fm10k_vf_info,
32 * fm10k_pci_tbl - PCI Device ID Table
34 * Wildcard entries (PCI_ANY_ID) should come last
35 * Last entry must be all 0s
37 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
38 * Class, Class Mask, private data (not used) }
40 static const struct pci_device_id fm10k_pci_tbl[] = {
41 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
42 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
43 /* required last entry */
46 MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
48 u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
50 struct fm10k_intfc *interface = hw->back;
53 if (FM10K_REMOVED(hw->hw_addr))
56 pci_read_config_word(interface->pdev, reg, &value);
58 fm10k_write_flush(hw);
63 u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
65 u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
68 if (FM10K_REMOVED(hw_addr))
71 value = readl(&hw_addr[reg]);
72 if (!(~value) && (!reg || !(~readl(hw_addr)))) {
73 struct fm10k_intfc *interface = hw->back;
74 struct net_device *netdev = interface->netdev;
77 netif_device_detach(netdev);
78 netdev_err(netdev, "PCIe link lost, device now detached\n");
84 static int fm10k_hw_ready(struct fm10k_intfc *interface)
86 struct fm10k_hw *hw = &interface->hw;
88 fm10k_write_flush(hw);
90 return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
93 void fm10k_service_event_schedule(struct fm10k_intfc *interface)
95 if (!test_bit(__FM10K_SERVICE_DISABLE, &interface->state) &&
96 !test_and_set_bit(__FM10K_SERVICE_SCHED, &interface->state))
97 queue_work(fm10k_workqueue, &interface->service_task);
100 static void fm10k_service_event_complete(struct fm10k_intfc *interface)
102 WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, &interface->state));
104 /* flush memory to make sure state is correct before next watchog */
105 smp_mb__before_atomic();
106 clear_bit(__FM10K_SERVICE_SCHED, &interface->state);
110 * fm10k_service_timer - Timer Call-back
111 * @data: pointer to interface cast into an unsigned long
113 static void fm10k_service_timer(unsigned long data)
115 struct fm10k_intfc *interface = (struct fm10k_intfc *)data;
117 /* Reset the timer */
118 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
120 fm10k_service_event_schedule(interface);
123 static void fm10k_detach_subtask(struct fm10k_intfc *interface)
125 struct net_device *netdev = interface->netdev;
126 u32 __iomem *hw_addr;
129 /* do nothing if device is still present or hw_addr is set */
130 if (netif_device_present(netdev) || interface->hw.hw_addr)
133 /* check the real address space to see if we've recovered */
134 hw_addr = READ_ONCE(interface->uc_addr);
135 value = readl(hw_addr);
137 interface->hw.hw_addr = interface->uc_addr;
138 netif_device_attach(netdev);
139 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
140 netdev_warn(netdev, "PCIe link restored, device now attached\n");
146 if (netif_running(netdev))
152 static void fm10k_prepare_for_reset(struct fm10k_intfc *interface)
154 struct net_device *netdev = interface->netdev;
156 WARN_ON(in_interrupt());
158 /* put off any impending NetWatchDogTimeout */
159 netif_trans_update(netdev);
161 while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
162 usleep_range(1000, 2000);
166 fm10k_iov_suspend(interface->pdev);
168 if (netif_running(netdev))
171 fm10k_mbx_free_irq(interface);
173 /* free interrupts */
174 fm10k_clear_queueing_scheme(interface);
176 /* delay any future reset requests */
177 interface->last_reset = jiffies + (10 * HZ);
182 static int fm10k_handle_reset(struct fm10k_intfc *interface)
184 struct net_device *netdev = interface->netdev;
185 struct fm10k_hw *hw = &interface->hw;
190 pci_set_master(interface->pdev);
192 /* reset and initialize the hardware so it is in a known state */
193 err = hw->mac.ops.reset_hw(hw);
195 dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
199 err = hw->mac.ops.init_hw(hw);
201 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
205 err = fm10k_init_queueing_scheme(interface);
207 dev_err(&interface->pdev->dev,
208 "init_queueing_scheme failed: %d\n", err);
212 /* re-associate interrupts */
213 err = fm10k_mbx_request_irq(interface);
217 err = fm10k_hw_ready(interface);
221 /* update hardware address for VFs if perm_addr has changed */
222 if (hw->mac.type == fm10k_mac_vf) {
223 if (is_valid_ether_addr(hw->mac.perm_addr)) {
224 ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
225 ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
226 ether_addr_copy(netdev->dev_addr, hw->mac.perm_addr);
227 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
230 if (hw->mac.vlan_override)
231 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
233 netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
236 err = netif_running(netdev) ? fm10k_open(netdev) : 0;
240 fm10k_iov_resume(interface->pdev);
244 clear_bit(__FM10K_RESETTING, &interface->state);
248 fm10k_mbx_free_irq(interface);
250 fm10k_clear_queueing_scheme(interface);
252 netif_device_detach(netdev);
256 clear_bit(__FM10K_RESETTING, &interface->state);
261 static void fm10k_reinit(struct fm10k_intfc *interface)
265 fm10k_prepare_for_reset(interface);
267 err = fm10k_handle_reset(interface);
269 dev_err(&interface->pdev->dev,
270 "fm10k_handle_reset failed: %d\n", err);
273 static void fm10k_reset_subtask(struct fm10k_intfc *interface)
275 if (!(interface->flags & FM10K_FLAG_RESET_REQUESTED))
278 interface->flags &= ~FM10K_FLAG_RESET_REQUESTED;
280 netdev_err(interface->netdev, "Reset interface\n");
282 fm10k_reinit(interface);
286 * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
287 * @interface: board private structure
289 * Configure the SWPRI to PC mapping for the port.
291 static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
293 struct net_device *netdev = interface->netdev;
294 struct fm10k_hw *hw = &interface->hw;
297 /* clear flag indicating update is needed */
298 interface->flags &= ~FM10K_FLAG_SWPRI_CONFIG;
300 /* these registers are only available on the PF */
301 if (hw->mac.type != fm10k_mac_pf)
304 /* configure SWPRI to PC map */
305 for (i = 0; i < FM10K_SWPRI_MAX; i++)
306 fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
307 netdev_get_prio_tc_map(netdev, i));
311 * fm10k_watchdog_update_host_state - Update the link status based on host.
312 * @interface: board private structure
314 static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
316 struct fm10k_hw *hw = &interface->hw;
319 if (test_bit(__FM10K_LINK_DOWN, &interface->state)) {
320 interface->host_ready = false;
321 if (time_is_after_jiffies(interface->link_down_event))
323 clear_bit(__FM10K_LINK_DOWN, &interface->state);
326 if (interface->flags & FM10K_FLAG_SWPRI_CONFIG) {
327 if (rtnl_trylock()) {
328 fm10k_configure_swpri_map(interface);
333 /* lock the mailbox for transmit and receive */
334 fm10k_mbx_lock(interface);
336 err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
337 if (err && time_is_before_jiffies(interface->last_reset))
338 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
341 fm10k_mbx_unlock(interface);
345 * fm10k_mbx_subtask - Process upstream and downstream mailboxes
346 * @interface: board private structure
348 * This function will process both the upstream and downstream mailboxes.
350 static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
352 /* process upstream mailbox and update device state */
353 fm10k_watchdog_update_host_state(interface);
355 /* process downstream mailboxes */
356 fm10k_iov_mbx(interface);
360 * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
361 * @interface: board private structure
363 static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
365 struct net_device *netdev = interface->netdev;
367 /* only continue if link state is currently down */
368 if (netif_carrier_ok(netdev))
371 netif_info(interface, drv, netdev, "NIC Link is up\n");
373 netif_carrier_on(netdev);
374 netif_tx_wake_all_queues(netdev);
378 * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
379 * @interface: board private structure
381 static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
383 struct net_device *netdev = interface->netdev;
385 /* only continue if link state is currently up */
386 if (!netif_carrier_ok(netdev))
389 netif_info(interface, drv, netdev, "NIC Link is down\n");
391 netif_carrier_off(netdev);
392 netif_tx_stop_all_queues(netdev);
396 * fm10k_update_stats - Update the board statistics counters.
397 * @interface: board private structure
399 void fm10k_update_stats(struct fm10k_intfc *interface)
401 struct net_device_stats *net_stats = &interface->netdev->stats;
402 struct fm10k_hw *hw = &interface->hw;
403 u64 hw_csum_tx_good = 0, hw_csum_rx_good = 0, rx_length_errors = 0;
404 u64 rx_switch_errors = 0, rx_drops = 0, rx_pp_errors = 0;
405 u64 rx_link_errors = 0;
406 u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
407 u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
408 u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
409 u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
413 /* ensure only one thread updates stats at a time */
414 if (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
417 /* do not allow stats update via service task for next second */
418 interface->next_stats_update = jiffies + HZ;
420 /* gather some stats to the interface struct that are per queue */
421 for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
422 struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]);
427 restart_queue += tx_ring->tx_stats.restart_queue;
428 tx_busy += tx_ring->tx_stats.tx_busy;
429 tx_csum_errors += tx_ring->tx_stats.csum_err;
430 bytes += tx_ring->stats.bytes;
431 pkts += tx_ring->stats.packets;
432 hw_csum_tx_good += tx_ring->tx_stats.csum_good;
435 interface->restart_queue = restart_queue;
436 interface->tx_busy = tx_busy;
437 net_stats->tx_bytes = bytes;
438 net_stats->tx_packets = pkts;
439 interface->tx_csum_errors = tx_csum_errors;
440 interface->hw_csum_tx_good = hw_csum_tx_good;
442 /* gather some stats to the interface struct that are per queue */
443 for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
444 struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]);
449 bytes += rx_ring->stats.bytes;
450 pkts += rx_ring->stats.packets;
451 alloc_failed += rx_ring->rx_stats.alloc_failed;
452 rx_csum_errors += rx_ring->rx_stats.csum_err;
453 rx_errors += rx_ring->rx_stats.errors;
454 hw_csum_rx_good += rx_ring->rx_stats.csum_good;
455 rx_switch_errors += rx_ring->rx_stats.switch_errors;
456 rx_drops += rx_ring->rx_stats.drops;
457 rx_pp_errors += rx_ring->rx_stats.pp_errors;
458 rx_link_errors += rx_ring->rx_stats.link_errors;
459 rx_length_errors += rx_ring->rx_stats.length_errors;
462 net_stats->rx_bytes = bytes;
463 net_stats->rx_packets = pkts;
464 interface->alloc_failed = alloc_failed;
465 interface->rx_csum_errors = rx_csum_errors;
466 interface->hw_csum_rx_good = hw_csum_rx_good;
467 interface->rx_switch_errors = rx_switch_errors;
468 interface->rx_drops = rx_drops;
469 interface->rx_pp_errors = rx_pp_errors;
470 interface->rx_link_errors = rx_link_errors;
471 interface->rx_length_errors = rx_length_errors;
473 hw->mac.ops.update_hw_stats(hw, &interface->stats);
475 for (i = 0; i < hw->mac.max_queues; i++) {
476 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
478 tx_bytes_nic += q->tx_bytes.count;
479 tx_pkts_nic += q->tx_packets.count;
480 rx_bytes_nic += q->rx_bytes.count;
481 rx_pkts_nic += q->rx_packets.count;
482 rx_drops_nic += q->rx_drops.count;
485 interface->tx_bytes_nic = tx_bytes_nic;
486 interface->tx_packets_nic = tx_pkts_nic;
487 interface->rx_bytes_nic = rx_bytes_nic;
488 interface->rx_packets_nic = rx_pkts_nic;
489 interface->rx_drops_nic = rx_drops_nic;
491 /* Fill out the OS statistics structure */
492 net_stats->rx_errors = rx_errors;
493 net_stats->rx_dropped = interface->stats.nodesc_drop.count;
495 clear_bit(__FM10K_UPDATING_STATS, &interface->state);
499 * fm10k_watchdog_flush_tx - flush queues on host not ready
500 * @interface - pointer to the device interface structure
502 static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
504 int some_tx_pending = 0;
507 /* nothing to do if carrier is up */
508 if (netif_carrier_ok(interface->netdev))
511 for (i = 0; i < interface->num_tx_queues; i++) {
512 struct fm10k_ring *tx_ring = interface->tx_ring[i];
514 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
520 /* We've lost link, so the controller stops DMA, but we've got
521 * queued Tx work that's never going to get done, so reset
522 * controller to flush Tx.
525 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
529 * fm10k_watchdog_subtask - check and bring link up
530 * @interface - pointer to the device interface structure
532 static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
534 /* if interface is down do nothing */
535 if (test_bit(__FM10K_DOWN, &interface->state) ||
536 test_bit(__FM10K_RESETTING, &interface->state))
539 if (interface->host_ready)
540 fm10k_watchdog_host_is_ready(interface);
542 fm10k_watchdog_host_not_ready(interface);
544 /* update stats only once every second */
545 if (time_is_before_jiffies(interface->next_stats_update))
546 fm10k_update_stats(interface);
548 /* flush any uncompleted work */
549 fm10k_watchdog_flush_tx(interface);
553 * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
554 * @interface - pointer to the device interface structure
556 * This function serves two purposes. First it strobes the interrupt lines
557 * in order to make certain interrupts are occurring. Secondly it sets the
558 * bits needed to check for TX hangs. As a result we should immediately
559 * determine if a hang has occurred.
561 static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
565 /* If we're down or resetting, just bail */
566 if (test_bit(__FM10K_DOWN, &interface->state) ||
567 test_bit(__FM10K_RESETTING, &interface->state))
570 /* rate limit tx hang checks to only once every 2 seconds */
571 if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
573 interface->next_tx_hang_check = jiffies + (2 * HZ);
575 if (netif_carrier_ok(interface->netdev)) {
576 /* Force detection of hung controller */
577 for (i = 0; i < interface->num_tx_queues; i++)
578 set_check_for_tx_hang(interface->tx_ring[i]);
580 /* Rearm all in-use q_vectors for immediate firing */
581 for (i = 0; i < interface->num_q_vectors; i++) {
582 struct fm10k_q_vector *qv = interface->q_vector[i];
584 if (!qv->tx.count && !qv->rx.count)
586 writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
592 * fm10k_service_task - manages and runs subtasks
593 * @work: pointer to work_struct containing our data
595 static void fm10k_service_task(struct work_struct *work)
597 struct fm10k_intfc *interface;
599 interface = container_of(work, struct fm10k_intfc, service_task);
601 /* tasks run even when interface is down */
602 fm10k_mbx_subtask(interface);
603 fm10k_detach_subtask(interface);
604 fm10k_reset_subtask(interface);
606 /* tasks only run when interface is up */
607 fm10k_watchdog_subtask(interface);
608 fm10k_check_hang_subtask(interface);
610 /* release lock on service events to allow scheduling next event */
611 fm10k_service_event_complete(interface);
615 * fm10k_configure_tx_ring - Configure Tx ring after Reset
616 * @interface: board private structure
617 * @ring: structure containing ring specific data
619 * Configure the Tx descriptor ring after a reset.
621 static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
622 struct fm10k_ring *ring)
624 struct fm10k_hw *hw = &interface->hw;
625 u64 tdba = ring->dma;
626 u32 size = ring->count * sizeof(struct fm10k_tx_desc);
627 u32 txint = FM10K_INT_MAP_DISABLE;
628 u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE;
629 u8 reg_idx = ring->reg_idx;
631 /* disable queue to avoid issues while updating state */
632 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
633 fm10k_write_flush(hw);
635 /* possible poll here to verify ring resources have been cleaned */
637 /* set location and size for descriptor ring */
638 fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
639 fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
640 fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
642 /* reset head and tail pointers */
643 fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
644 fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
646 /* store tail pointer */
647 ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
649 /* reset ntu and ntc to place SW in sync with hardware */
650 ring->next_to_clean = 0;
651 ring->next_to_use = 0;
654 if (ring->q_vector) {
655 txint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
656 txint |= FM10K_INT_MAP_TIMER0;
659 fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
661 /* enable use of FTAG bit in Tx descriptor, register is RO for VF */
662 fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
663 FM10K_PFVTCTL_FTAG_DESC_ENABLE);
666 if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, &ring->state) &&
668 netif_set_xps_queue(ring->netdev,
669 &ring->q_vector->affinity_mask,
673 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
677 * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
678 * @interface: board private structure
679 * @ring: structure containing ring specific data
681 * Verify the Tx descriptor ring is ready for transmit.
683 static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
684 struct fm10k_ring *ring)
686 struct fm10k_hw *hw = &interface->hw;
689 u8 reg_idx = ring->reg_idx;
691 /* if we are already enabled just exit */
692 if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
695 /* poll to verify queue is enabled */
697 usleep_range(1000, 2000);
698 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
699 } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
701 netif_err(interface, drv, interface->netdev,
702 "Could not enable Tx Queue %d\n", reg_idx);
706 * fm10k_configure_tx - Configure Transmit Unit after Reset
707 * @interface: board private structure
709 * Configure the Tx unit of the MAC after a reset.
711 static void fm10k_configure_tx(struct fm10k_intfc *interface)
715 /* Setup the HW Tx Head and Tail descriptor pointers */
716 for (i = 0; i < interface->num_tx_queues; i++)
717 fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
719 /* poll here to verify that Tx rings are now enabled */
720 for (i = 0; i < interface->num_tx_queues; i++)
721 fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
725 * fm10k_configure_rx_ring - Configure Rx ring after Reset
726 * @interface: board private structure
727 * @ring: structure containing ring specific data
729 * Configure the Rx descriptor ring after a reset.
731 static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
732 struct fm10k_ring *ring)
734 u64 rdba = ring->dma;
735 struct fm10k_hw *hw = &interface->hw;
736 u32 size = ring->count * sizeof(union fm10k_rx_desc);
737 u32 rxqctl, rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
738 u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
739 u32 rxint = FM10K_INT_MAP_DISABLE;
740 u8 rx_pause = interface->rx_pause;
741 u8 reg_idx = ring->reg_idx;
743 /* disable queue to avoid issues while updating state */
744 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
745 rxqctl &= ~FM10K_RXQCTL_ENABLE;
746 fm10k_write_flush(hw);
748 /* possible poll here to verify ring resources have been cleaned */
750 /* set location and size for descriptor ring */
751 fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
752 fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
753 fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
755 /* reset head and tail pointers */
756 fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
757 fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
759 /* store tail pointer */
760 ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
762 /* reset ntu and ntc to place SW in sync with hardware */
763 ring->next_to_clean = 0;
764 ring->next_to_use = 0;
765 ring->next_to_alloc = 0;
767 /* Configure the Rx buffer size for one buff without split */
768 srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
770 /* Configure the Rx ring to suppress loopback packets */
771 srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
772 fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
774 /* Enable drop on empty */
776 if (interface->pfc_en)
777 rx_pause = interface->pfc_en;
779 if (!(rx_pause & BIT(ring->qos_pc)))
780 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
782 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
784 /* assign default VLAN to queue */
785 ring->vid = hw->mac.default_vid;
787 /* if we have an active VLAN, disable default VLAN ID */
788 if (test_bit(hw->mac.default_vid, interface->active_vlans))
789 ring->vid |= FM10K_VLAN_CLEAR;
792 if (ring->q_vector) {
793 rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
794 rxint |= FM10K_INT_MAP_TIMER1;
797 fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
800 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
801 rxqctl |= FM10K_RXQCTL_ENABLE;
802 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
804 /* place buffers on ring for receive data */
805 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
809 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
810 * @interface: board private structure
812 * Configure the drop enable bits for the Rx rings.
814 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
816 struct fm10k_hw *hw = &interface->hw;
817 u8 rx_pause = interface->rx_pause;
821 if (interface->pfc_en)
822 rx_pause = interface->pfc_en;
825 for (i = 0; i < interface->num_rx_queues; i++) {
826 struct fm10k_ring *ring = interface->rx_ring[i];
827 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
828 u8 reg_idx = ring->reg_idx;
830 if (!(rx_pause & BIT(ring->qos_pc)))
831 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
833 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
838 * fm10k_configure_dglort - Configure Receive DGLORT after reset
839 * @interface: board private structure
841 * Configure the DGLORT description and RSS tables.
843 static void fm10k_configure_dglort(struct fm10k_intfc *interface)
845 struct fm10k_dglort_cfg dglort = { 0 };
846 struct fm10k_hw *hw = &interface->hw;
850 /* Fill out hash function seeds */
851 for (i = 0; i < FM10K_RSSRK_SIZE; i++)
852 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
854 /* Write RETA table to hardware */
855 for (i = 0; i < FM10K_RETA_SIZE; i++)
856 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
858 /* Generate RSS hash based on packet types, TCP/UDP
859 * port numbers and/or IPv4/v6 src and dst addresses
861 mrqc = FM10K_MRQC_IPV4 |
862 FM10K_MRQC_TCP_IPV4 |
866 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV4_UDP)
867 mrqc |= FM10K_MRQC_UDP_IPV4;
868 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV6_UDP)
869 mrqc |= FM10K_MRQC_UDP_IPV6;
871 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
873 /* configure default DGLORT mapping for RSS/DCB */
874 dglort.inner_rss = 1;
875 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
876 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
877 hw->mac.ops.configure_dglort_map(hw, &dglort);
879 /* assign GLORT per queue for queue mapped testing */
880 if (interface->glort_count > 64) {
881 memset(&dglort, 0, sizeof(dglort));
882 dglort.inner_rss = 1;
883 dglort.glort = interface->glort + 64;
884 dglort.idx = fm10k_dglort_pf_queue;
885 dglort.queue_l = fls(interface->num_rx_queues - 1);
886 hw->mac.ops.configure_dglort_map(hw, &dglort);
889 /* assign glort value for RSS/DCB specific to this interface */
890 memset(&dglort, 0, sizeof(dglort));
891 dglort.inner_rss = 1;
892 dglort.glort = interface->glort;
893 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
894 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
895 /* configure DGLORT mapping for RSS/DCB */
896 dglort.idx = fm10k_dglort_pf_rss;
897 if (interface->l2_accel)
898 dglort.shared_l = fls(interface->l2_accel->size);
899 hw->mac.ops.configure_dglort_map(hw, &dglort);
903 * fm10k_configure_rx - Configure Receive Unit after Reset
904 * @interface: board private structure
906 * Configure the Rx unit of the MAC after a reset.
908 static void fm10k_configure_rx(struct fm10k_intfc *interface)
912 /* Configure SWPRI to PC map */
913 fm10k_configure_swpri_map(interface);
915 /* Configure RSS and DGLORT map */
916 fm10k_configure_dglort(interface);
918 /* Setup the HW Rx Head and Tail descriptor pointers */
919 for (i = 0; i < interface->num_rx_queues; i++)
920 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
922 /* possible poll here to verify that Rx rings are now enabled */
925 static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
927 struct fm10k_q_vector *q_vector;
930 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
931 q_vector = interface->q_vector[q_idx];
932 napi_enable(&q_vector->napi);
936 static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
938 struct fm10k_q_vector *q_vector = data;
940 if (q_vector->rx.count || q_vector->tx.count)
941 napi_schedule_irqoff(&q_vector->napi);
946 static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
948 struct fm10k_intfc *interface = data;
949 struct fm10k_hw *hw = &interface->hw;
950 struct fm10k_mbx_info *mbx = &hw->mbx;
952 /* re-enable mailbox interrupt and indicate 20us delay */
953 fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
954 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
957 /* service upstream mailbox */
958 if (fm10k_mbx_trylock(interface)) {
959 mbx->ops.process(hw, mbx);
960 fm10k_mbx_unlock(interface);
963 hw->mac.get_host_state = true;
964 fm10k_service_event_schedule(interface);
969 #ifdef CONFIG_NET_POLL_CONTROLLER
971 * fm10k_netpoll - A Polling 'interrupt' handler
972 * @netdev: network interface device structure
974 * This is used by netconsole to send skbs without having to re-enable
975 * interrupts. It's not called while the normal interrupt routine is executing.
977 void fm10k_netpoll(struct net_device *netdev)
979 struct fm10k_intfc *interface = netdev_priv(netdev);
982 /* if interface is down do nothing */
983 if (test_bit(__FM10K_DOWN, &interface->state))
986 for (i = 0; i < interface->num_q_vectors; i++)
987 fm10k_msix_clean_rings(0, interface->q_vector[i]);
991 #define FM10K_ERR_MSG(type) case (type): error = #type; break
992 static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
993 struct fm10k_fault *fault)
995 struct pci_dev *pdev = interface->pdev;
996 struct fm10k_hw *hw = &interface->hw;
997 struct fm10k_iov_data *iov_data = interface->iov_data;
1001 case FM10K_PCA_FAULT:
1002 switch (fault->type) {
1004 error = "Unknown PCA error";
1006 FM10K_ERR_MSG(PCA_NO_FAULT);
1007 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
1008 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
1009 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
1010 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
1011 FM10K_ERR_MSG(PCA_POISONED_TLP);
1012 FM10K_ERR_MSG(PCA_TLP_ABORT);
1015 case FM10K_THI_FAULT:
1016 switch (fault->type) {
1018 error = "Unknown THI error";
1020 FM10K_ERR_MSG(THI_NO_FAULT);
1021 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1024 case FM10K_FUM_FAULT:
1025 switch (fault->type) {
1027 error = "Unknown FUM error";
1029 FM10K_ERR_MSG(FUM_NO_FAULT);
1030 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
1031 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
1032 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
1033 FM10K_ERR_MSG(FUM_RO_ERROR);
1034 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
1035 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
1036 FM10K_ERR_MSG(FUM_INVALID_TYPE);
1037 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
1038 FM10K_ERR_MSG(FUM_INVALID_BE);
1039 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
1043 error = "Undocumented fault";
1047 dev_warn(&pdev->dev,
1048 "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
1049 error, fault->address, fault->specinfo,
1050 PCI_SLOT(fault->func), PCI_FUNC(fault->func));
1052 /* For VF faults, clear out the respective LPORT, reset the queue
1053 * resources, and then reconnect to the mailbox. This allows the
1054 * VF in question to resume behavior. For transient faults that are
1055 * the result of non-malicious behavior this will log the fault and
1056 * allow the VF to resume functionality. Obviously for malicious VFs
1057 * they will be able to attempt malicious behavior again. In this
1058 * case, the system administrator will need to step in and manually
1059 * remove or disable the VF in question.
1061 if (fault->func && iov_data) {
1062 int vf = fault->func - 1;
1063 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1065 hw->iov.ops.reset_lport(hw, vf_info);
1066 hw->iov.ops.reset_resources(hw, vf_info);
1068 /* reset_lport disables the VF, so re-enable it */
1069 hw->iov.ops.set_lport(hw, vf_info, vf,
1070 FM10K_VF_FLAG_MULTI_CAPABLE);
1072 /* reset_resources will disconnect from the mbx */
1073 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1077 static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1079 struct fm10k_hw *hw = &interface->hw;
1080 struct fm10k_fault fault = { 0 };
1083 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1085 eicr >>= 1, type += FM10K_FAULT_SIZE) {
1086 /* only check if there is an error reported */
1090 /* retrieve fault info */
1091 err = hw->mac.ops.get_fault(hw, type, &fault);
1093 dev_err(&interface->pdev->dev,
1094 "error reading fault\n");
1098 fm10k_handle_fault(interface, type, &fault);
1102 static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1104 struct fm10k_hw *hw = &interface->hw;
1105 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1109 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1112 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1114 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1116 if (maxholdq & BIT(31)) {
1117 if (q < FM10K_MAX_QUEUES_PF) {
1118 interface->rx_overrun_pf++;
1119 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
1121 interface->rx_overrun_vf++;
1135 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1137 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1141 static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1143 struct fm10k_intfc *interface = data;
1144 struct fm10k_hw *hw = &interface->hw;
1145 struct fm10k_mbx_info *mbx = &hw->mbx;
1149 /* unmask any set bits related to this interrupt */
1150 eicr = fm10k_read_reg(hw, FM10K_EICR);
1151 fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
1152 FM10K_EICR_SWITCHREADY |
1153 FM10K_EICR_SWITCHNOTREADY));
1155 /* report any faults found to the message log */
1156 fm10k_report_fault(interface, eicr);
1158 /* reset any queues disabled due to receiver overrun */
1159 fm10k_reset_drop_on_empty(interface, eicr);
1161 /* service mailboxes */
1162 if (fm10k_mbx_trylock(interface)) {
1163 err = mbx->ops.process(hw, mbx);
1164 /* handle VFLRE events */
1165 fm10k_iov_event(interface);
1166 fm10k_mbx_unlock(interface);
1169 if (err == FM10K_ERR_RESET_REQUESTED)
1170 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1172 /* if switch toggled state we should reset GLORTs */
1173 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1174 /* force link down for at least 4 seconds */
1175 interface->link_down_event = jiffies + (4 * HZ);
1176 set_bit(__FM10K_LINK_DOWN, &interface->state);
1178 /* reset dglort_map back to no config */
1179 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1182 /* we should validate host state after interrupt event */
1183 hw->mac.get_host_state = true;
1185 /* validate host state, and handle VF mailboxes in the service task */
1186 fm10k_service_event_schedule(interface);
1188 /* re-enable mailbox interrupt and indicate 20us delay */
1189 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1190 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1196 void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1198 struct fm10k_hw *hw = &interface->hw;
1199 struct msix_entry *entry;
1202 /* no mailbox IRQ to free if MSI-X is not enabled */
1203 if (!interface->msix_entries)
1206 entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1208 /* disconnect the mailbox */
1209 hw->mbx.ops.disconnect(hw, &hw->mbx);
1211 /* disable Mailbox cause */
1212 if (hw->mac.type == fm10k_mac_pf) {
1213 fm10k_write_reg(hw, FM10K_EIMR,
1214 FM10K_EIMR_DISABLE(PCA_FAULT) |
1215 FM10K_EIMR_DISABLE(FUM_FAULT) |
1216 FM10K_EIMR_DISABLE(MAILBOX) |
1217 FM10K_EIMR_DISABLE(SWITCHREADY) |
1218 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1219 FM10K_EIMR_DISABLE(SRAMERROR) |
1220 FM10K_EIMR_DISABLE(VFLR) |
1221 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1222 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1224 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1227 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1229 free_irq(entry->vector, interface);
1232 static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1233 struct fm10k_mbx_info *mbx)
1235 bool vlan_override = hw->mac.vlan_override;
1236 u16 default_vid = hw->mac.default_vid;
1237 struct fm10k_intfc *interface;
1240 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1244 interface = container_of(hw, struct fm10k_intfc, hw);
1246 /* MAC was changed so we need reset */
1247 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1248 !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1249 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1251 /* VLAN override was changed, or default VLAN changed */
1252 if ((vlan_override != hw->mac.vlan_override) ||
1253 (default_vid != hw->mac.default_vid))
1254 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1259 /* generic error handler for mailbox issues */
1260 static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1261 struct fm10k_mbx_info __always_unused *mbx)
1263 struct fm10k_intfc *interface;
1264 struct pci_dev *pdev;
1266 interface = container_of(hw, struct fm10k_intfc, hw);
1267 pdev = interface->pdev;
1269 dev_err(&pdev->dev, "Unknown message ID %u\n",
1270 **results & FM10K_TLV_ID_MASK);
1275 static const struct fm10k_msg_data vf_mbx_data[] = {
1276 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1277 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1278 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1279 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1282 static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1284 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1285 struct net_device *dev = interface->netdev;
1286 struct fm10k_hw *hw = &interface->hw;
1289 /* Use timer0 for interrupt moderation on the mailbox */
1290 u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1292 /* register mailbox handlers */
1293 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1297 /* request the IRQ */
1298 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1299 dev->name, interface);
1301 netif_err(interface, probe, dev,
1302 "request_irq for msix_mbx failed: %d\n", err);
1306 /* map all of the interrupt sources */
1307 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1309 /* enable interrupt */
1310 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1315 static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1316 struct fm10k_mbx_info *mbx)
1318 struct fm10k_intfc *interface;
1319 u32 dglort_map = hw->mac.dglort_map;
1322 interface = container_of(hw, struct fm10k_intfc, hw);
1324 err = fm10k_msg_err_pf(hw, results, mbx);
1325 if (!err && hw->swapi.status) {
1326 /* force link down for a reasonable delay */
1327 interface->link_down_event = jiffies + (2 * HZ);
1328 set_bit(__FM10K_LINK_DOWN, &interface->state);
1330 /* reset dglort_map back to no config */
1331 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1333 fm10k_service_event_schedule(interface);
1335 /* prevent overloading kernel message buffer */
1336 if (interface->lport_map_failed)
1339 interface->lport_map_failed = true;
1341 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1342 dev_warn(&interface->pdev->dev,
1343 "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1344 dev_warn(&interface->pdev->dev,
1345 "request logical port map failed: %d\n",
1351 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1355 interface->lport_map_failed = false;
1357 /* we need to reset if port count was just updated */
1358 if (dglort_map != hw->mac.dglort_map)
1359 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1364 static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1365 struct fm10k_mbx_info __always_unused *mbx)
1367 struct fm10k_intfc *interface;
1372 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1377 /* extract values from the pvid update */
1378 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1379 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1381 /* if glort is not valid return error */
1382 if (!fm10k_glort_valid_pf(hw, glort))
1383 return FM10K_ERR_PARAM;
1385 /* verify VLAN ID is valid */
1386 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1387 return FM10K_ERR_PARAM;
1389 interface = container_of(hw, struct fm10k_intfc, hw);
1391 /* check to see if this belongs to one of the VFs */
1392 err = fm10k_iov_update_pvid(interface, glort, pvid);
1396 /* we need to reset if default VLAN was just updated */
1397 if (pvid != hw->mac.default_vid)
1398 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1400 hw->mac.default_vid = pvid;
1405 static const struct fm10k_msg_data pf_mbx_data[] = {
1406 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1407 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1408 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1409 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1410 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1411 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1412 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1415 static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1417 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1418 struct net_device *dev = interface->netdev;
1419 struct fm10k_hw *hw = &interface->hw;
1422 /* Use timer0 for interrupt moderation on the mailbox */
1423 u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1424 u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1426 /* register mailbox handlers */
1427 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1431 /* request the IRQ */
1432 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1433 dev->name, interface);
1435 netif_err(interface, probe, dev,
1436 "request_irq for msix_mbx failed: %d\n", err);
1440 /* Enable interrupts w/ no moderation for "other" interrupts */
1441 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1442 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1443 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1444 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1445 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1447 /* Enable interrupts w/ moderation for mailbox */
1448 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1450 /* Enable individual interrupt causes */
1451 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1452 FM10K_EIMR_ENABLE(FUM_FAULT) |
1453 FM10K_EIMR_ENABLE(MAILBOX) |
1454 FM10K_EIMR_ENABLE(SWITCHREADY) |
1455 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1456 FM10K_EIMR_ENABLE(SRAMERROR) |
1457 FM10K_EIMR_ENABLE(VFLR) |
1458 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1460 /* enable interrupt */
1461 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1466 int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1468 struct fm10k_hw *hw = &interface->hw;
1471 /* enable Mailbox cause */
1472 if (hw->mac.type == fm10k_mac_pf)
1473 err = fm10k_mbx_request_irq_pf(interface);
1475 err = fm10k_mbx_request_irq_vf(interface);
1479 /* connect mailbox */
1480 err = hw->mbx.ops.connect(hw, &hw->mbx);
1482 /* if the mailbox failed to connect, then free IRQ */
1484 fm10k_mbx_free_irq(interface);
1490 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1491 * @interface: board private structure
1493 * Release all interrupts associated with this interface
1495 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1497 int vector = interface->num_q_vectors;
1498 struct fm10k_hw *hw = &interface->hw;
1499 struct msix_entry *entry;
1501 entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
1504 struct fm10k_q_vector *q_vector;
1508 q_vector = interface->q_vector[vector];
1510 if (!q_vector->tx.count && !q_vector->rx.count)
1513 /* clear the affinity_mask in the IRQ descriptor */
1514 irq_set_affinity_hint(entry->vector, NULL);
1516 /* disable interrupts */
1517 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1519 free_irq(entry->vector, q_vector);
1524 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1525 * @interface: board private structure
1527 * Attempts to configure interrupts using the best available
1528 * capabilities of the hardware and kernel.
1530 int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1532 struct net_device *dev = interface->netdev;
1533 struct fm10k_hw *hw = &interface->hw;
1534 struct msix_entry *entry;
1538 entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
1540 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1541 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1543 /* name the vector */
1544 if (q_vector->tx.count && q_vector->rx.count) {
1545 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1546 "%s-TxRx-%d", dev->name, ri++);
1548 } else if (q_vector->rx.count) {
1549 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1550 "%s-rx-%d", dev->name, ri++);
1551 } else if (q_vector->tx.count) {
1552 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1553 "%s-tx-%d", dev->name, ti++);
1555 /* skip this unused q_vector */
1559 /* Assign ITR register to q_vector */
1560 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1561 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1562 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1564 /* request the IRQ */
1565 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1566 q_vector->name, q_vector);
1568 netif_err(interface, probe, dev,
1569 "request_irq failed for MSIX interrupt Error: %d\n",
1574 /* assign the mask for this irq */
1575 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1577 /* Enable q_vector */
1578 writel(FM10K_ITR_ENABLE, q_vector->itr);
1586 /* wind through the ring freeing all entries and vectors */
1588 struct fm10k_q_vector *q_vector;
1592 q_vector = interface->q_vector[vector];
1594 if (!q_vector->tx.count && !q_vector->rx.count)
1597 /* clear the affinity_mask in the IRQ descriptor */
1598 irq_set_affinity_hint(entry->vector, NULL);
1600 /* disable interrupts */
1601 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1603 free_irq(entry->vector, q_vector);
1609 void fm10k_up(struct fm10k_intfc *interface)
1611 struct fm10k_hw *hw = &interface->hw;
1613 /* Enable Tx/Rx DMA */
1614 hw->mac.ops.start_hw(hw);
1616 /* configure Tx descriptor rings */
1617 fm10k_configure_tx(interface);
1619 /* configure Rx descriptor rings */
1620 fm10k_configure_rx(interface);
1622 /* configure interrupts */
1623 hw->mac.ops.update_int_moderator(hw);
1625 /* enable statistics capture again */
1626 clear_bit(__FM10K_UPDATING_STATS, &interface->state);
1628 /* clear down bit to indicate we are ready to go */
1629 clear_bit(__FM10K_DOWN, &interface->state);
1631 /* enable polling cleanups */
1632 fm10k_napi_enable_all(interface);
1634 /* re-establish Rx filters */
1635 fm10k_restore_rx_state(interface);
1637 /* enable transmits */
1638 netif_tx_start_all_queues(interface->netdev);
1640 /* kick off the service timer now */
1641 hw->mac.get_host_state = true;
1642 mod_timer(&interface->service_timer, jiffies);
1645 static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1647 struct fm10k_q_vector *q_vector;
1650 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1651 q_vector = interface->q_vector[q_idx];
1652 napi_disable(&q_vector->napi);
1656 void fm10k_down(struct fm10k_intfc *interface)
1658 struct net_device *netdev = interface->netdev;
1659 struct fm10k_hw *hw = &interface->hw;
1660 int err, i = 0, count = 0;
1662 /* signal that we are down to the interrupt handler and service task */
1663 if (test_and_set_bit(__FM10K_DOWN, &interface->state))
1666 /* call carrier off first to avoid false dev_watchdog timeouts */
1667 netif_carrier_off(netdev);
1669 /* disable transmits */
1670 netif_tx_stop_all_queues(netdev);
1671 netif_tx_disable(netdev);
1673 /* reset Rx filters */
1674 fm10k_reset_rx_state(interface);
1676 /* disable polling routines */
1677 fm10k_napi_disable_all(interface);
1679 /* capture stats one last time before stopping interface */
1680 fm10k_update_stats(interface);
1682 /* prevent updating statistics while we're down */
1683 while (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
1684 usleep_range(1000, 2000);
1686 /* skip waiting for TX DMA if we lost PCIe link */
1687 if (FM10K_REMOVED(hw->hw_addr))
1688 goto skip_tx_dma_drain;
1690 /* In some rare circumstances it can take a while for Tx queues to
1691 * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1692 * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1693 * until the Tx queues have emptied, or until a number of retries. If
1694 * we fail to clear within the retry loop, we will issue a warning
1695 * indicating that Tx DMA is probably hung. Note this means we call
1696 * .stop_hw() twice but this shouldn't cause any problems.
1698 err = hw->mac.ops.stop_hw(hw);
1699 if (err != FM10K_ERR_REQUESTS_PENDING)
1700 goto skip_tx_dma_drain;
1702 #define TX_DMA_DRAIN_RETRIES 25
1703 for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1704 usleep_range(10000, 20000);
1706 /* start checking at the last ring to have pending Tx */
1707 for (; i < interface->num_tx_queues; i++)
1708 if (fm10k_get_tx_pending(interface->tx_ring[i], false))
1711 /* if all the queues are drained, we can break now */
1712 if (i == interface->num_tx_queues)
1716 if (count >= TX_DMA_DRAIN_RETRIES)
1717 dev_err(&interface->pdev->dev,
1718 "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1721 /* Disable DMA engine for Tx/Rx */
1722 err = hw->mac.ops.stop_hw(hw);
1723 if (err == FM10K_ERR_REQUESTS_PENDING)
1724 dev_err(&interface->pdev->dev,
1725 "due to pending requests hw was not shut down gracefully\n");
1727 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1729 /* free any buffers still on the rings */
1730 fm10k_clean_all_tx_rings(interface);
1731 fm10k_clean_all_rx_rings(interface);
1735 * fm10k_sw_init - Initialize general software structures
1736 * @interface: host interface private structure to initialize
1738 * fm10k_sw_init initializes the interface private data structure.
1739 * Fields are initialized based on PCI device information and
1740 * OS network device settings (MTU size).
1742 static int fm10k_sw_init(struct fm10k_intfc *interface,
1743 const struct pci_device_id *ent)
1745 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1746 struct fm10k_hw *hw = &interface->hw;
1747 struct pci_dev *pdev = interface->pdev;
1748 struct net_device *netdev = interface->netdev;
1749 u32 rss_key[FM10K_RSSRK_SIZE];
1753 /* initialize back pointer */
1754 hw->back = interface;
1755 hw->hw_addr = interface->uc_addr;
1757 /* PCI config space info */
1758 hw->vendor_id = pdev->vendor;
1759 hw->device_id = pdev->device;
1760 hw->revision_id = pdev->revision;
1761 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1762 hw->subsystem_device_id = pdev->subsystem_device;
1765 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1766 hw->mac.type = fi->mac;
1768 /* Setup IOV handlers */
1770 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1772 /* Set common capability flags and settings */
1773 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
1774 interface->ring_feature[RING_F_RSS].limit = rss;
1775 fi->get_invariants(hw);
1777 /* pick up the PCIe bus settings for reporting later */
1778 if (hw->mac.ops.get_bus_info)
1779 hw->mac.ops.get_bus_info(hw);
1781 /* limit the usable DMA range */
1782 if (hw->mac.ops.set_dma_mask)
1783 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
1785 /* update netdev with DMA restrictions */
1786 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
1787 netdev->features |= NETIF_F_HIGHDMA;
1788 netdev->vlan_features |= NETIF_F_HIGHDMA;
1791 /* delay any future reset requests */
1792 interface->last_reset = jiffies + (10 * HZ);
1794 /* reset and initialize the hardware so it is in a known state */
1795 err = hw->mac.ops.reset_hw(hw);
1797 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
1801 err = hw->mac.ops.init_hw(hw);
1803 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
1807 /* initialize hardware statistics */
1808 hw->mac.ops.update_hw_stats(hw, &interface->stats);
1810 /* Set upper limit on IOV VFs that can be allocated */
1811 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
1813 /* Start with random Ethernet address */
1814 eth_random_addr(hw->mac.addr);
1816 /* Initialize MAC address from hardware */
1817 err = hw->mac.ops.read_mac_addr(hw);
1819 dev_warn(&pdev->dev,
1820 "Failed to obtain MAC address defaulting to random\n");
1821 /* tag address assignment as random */
1822 netdev->addr_assign_type |= NET_ADDR_RANDOM;
1825 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
1826 ether_addr_copy(netdev->perm_addr, hw->mac.addr);
1828 if (!is_valid_ether_addr(netdev->perm_addr)) {
1829 dev_err(&pdev->dev, "Invalid MAC Address\n");
1833 /* initialize DCBNL interface */
1834 fm10k_dcbnl_set_ops(netdev);
1836 /* set default ring sizes */
1837 interface->tx_ring_count = FM10K_DEFAULT_TXD;
1838 interface->rx_ring_count = FM10K_DEFAULT_RXD;
1840 /* set default interrupt moderation */
1841 interface->tx_itr = FM10K_TX_ITR_DEFAULT;
1842 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
1844 /* initialize udp port lists */
1845 INIT_LIST_HEAD(&interface->vxlan_port);
1846 INIT_LIST_HEAD(&interface->geneve_port);
1848 netdev_rss_key_fill(rss_key, sizeof(rss_key));
1849 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
1851 /* Start off interface as being down */
1852 set_bit(__FM10K_DOWN, &interface->state);
1853 set_bit(__FM10K_UPDATING_STATS, &interface->state);
1858 static void fm10k_slot_warn(struct fm10k_intfc *interface)
1860 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
1861 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
1862 struct fm10k_hw *hw = &interface->hw;
1863 int max_gts = 0, expected_gts = 0;
1865 if (pcie_get_minimum_link(interface->pdev, &speed, &width) ||
1866 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
1867 dev_warn(&interface->pdev->dev,
1868 "Unable to determine PCI Express bandwidth.\n");
1873 case PCIE_SPEED_2_5GT:
1874 /* 8b/10b encoding reduces max throughput by 20% */
1875 max_gts = 2 * width;
1877 case PCIE_SPEED_5_0GT:
1878 /* 8b/10b encoding reduces max throughput by 20% */
1879 max_gts = 4 * width;
1881 case PCIE_SPEED_8_0GT:
1882 /* 128b/130b encoding has less than 2% impact on throughput */
1883 max_gts = 8 * width;
1886 dev_warn(&interface->pdev->dev,
1887 "Unable to determine PCI Express bandwidth.\n");
1891 dev_info(&interface->pdev->dev,
1892 "PCI Express bandwidth of %dGT/s available\n",
1894 dev_info(&interface->pdev->dev,
1895 "(Speed:%s, Width: x%d, Encoding Loss:%s, Payload:%s)\n",
1896 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
1897 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
1898 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
1901 (speed == PCIE_SPEED_2_5GT ? "20%" :
1902 speed == PCIE_SPEED_5_0GT ? "20%" :
1903 speed == PCIE_SPEED_8_0GT ? "<2%" :
1905 (hw->bus.payload == fm10k_bus_payload_128 ? "128B" :
1906 hw->bus.payload == fm10k_bus_payload_256 ? "256B" :
1907 hw->bus.payload == fm10k_bus_payload_512 ? "512B" :
1910 switch (hw->bus_caps.speed) {
1911 case fm10k_bus_speed_2500:
1912 /* 8b/10b encoding reduces max throughput by 20% */
1913 expected_gts = 2 * hw->bus_caps.width;
1915 case fm10k_bus_speed_5000:
1916 /* 8b/10b encoding reduces max throughput by 20% */
1917 expected_gts = 4 * hw->bus_caps.width;
1919 case fm10k_bus_speed_8000:
1920 /* 128b/130b encoding has less than 2% impact on throughput */
1921 expected_gts = 8 * hw->bus_caps.width;
1924 dev_warn(&interface->pdev->dev,
1925 "Unable to determine expected PCI Express bandwidth.\n");
1929 if (max_gts >= expected_gts)
1932 dev_warn(&interface->pdev->dev,
1933 "This device requires %dGT/s of bandwidth for optimal performance.\n",
1935 dev_warn(&interface->pdev->dev,
1936 "A %sslot with x%d lanes is suggested.\n",
1937 (hw->bus_caps.speed == fm10k_bus_speed_2500 ? "2.5GT/s " :
1938 hw->bus_caps.speed == fm10k_bus_speed_5000 ? "5.0GT/s " :
1939 hw->bus_caps.speed == fm10k_bus_speed_8000 ? "8.0GT/s " : ""),
1940 hw->bus_caps.width);
1944 * fm10k_probe - Device Initialization Routine
1945 * @pdev: PCI device information struct
1946 * @ent: entry in fm10k_pci_tbl
1948 * Returns 0 on success, negative on failure
1950 * fm10k_probe initializes an interface identified by a pci_dev structure.
1951 * The OS initialization, configuring of the interface private structure,
1952 * and a hardware reset occur.
1954 static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1956 struct net_device *netdev;
1957 struct fm10k_intfc *interface;
1960 if (pdev->error_state != pci_channel_io_normal) {
1962 "PCI device still in an error state. Unable to load...\n");
1966 err = pci_enable_device_mem(pdev);
1969 "PCI enable device failed: %d\n", err);
1973 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
1975 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1978 "DMA configuration failed: %d\n", err);
1982 err = pci_request_mem_regions(pdev, fm10k_driver_name);
1985 "pci_request_selected_regions failed: %d\n", err);
1989 pci_enable_pcie_error_reporting(pdev);
1991 pci_set_master(pdev);
1992 pci_save_state(pdev);
1994 netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
1997 goto err_alloc_netdev;
2000 SET_NETDEV_DEV(netdev, &pdev->dev);
2002 interface = netdev_priv(netdev);
2003 pci_set_drvdata(pdev, interface);
2005 interface->netdev = netdev;
2006 interface->pdev = pdev;
2008 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
2009 FM10K_UC_ADDR_SIZE);
2010 if (!interface->uc_addr) {
2015 err = fm10k_sw_init(interface, ent);
2019 /* enable debugfs support */
2020 fm10k_dbg_intfc_init(interface);
2022 err = fm10k_init_queueing_scheme(interface);
2026 /* the mbx interrupt might attempt to schedule the service task, so we
2027 * must ensure it is disabled since we haven't yet requested the timer
2030 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2032 err = fm10k_mbx_request_irq(interface);
2034 goto err_mbx_interrupt;
2036 /* final check of hardware state before registering the interface */
2037 err = fm10k_hw_ready(interface);
2041 err = register_netdev(netdev);
2045 /* carrier off reporting is important to ethtool even BEFORE open */
2046 netif_carrier_off(netdev);
2048 /* stop all the transmit queues from transmitting until link is up */
2049 netif_tx_stop_all_queues(netdev);
2051 /* Initialize service timer and service task late in order to avoid
2054 setup_timer(&interface->service_timer, &fm10k_service_timer,
2055 (unsigned long)interface);
2056 INIT_WORK(&interface->service_task, fm10k_service_task);
2058 /* kick off service timer now, even when interface is down */
2059 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2061 /* print warning for non-optimal configurations */
2062 fm10k_slot_warn(interface);
2064 /* report MAC address for logging */
2065 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2067 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2068 fm10k_iov_configure(pdev, 0);
2070 /* clear the service task disable bit to allow service task to start */
2071 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2076 fm10k_mbx_free_irq(interface);
2078 fm10k_clear_queueing_scheme(interface);
2080 if (interface->sw_addr)
2081 iounmap(interface->sw_addr);
2082 iounmap(interface->uc_addr);
2084 free_netdev(netdev);
2086 pci_disable_pcie_error_reporting(pdev);
2087 pci_release_mem_regions(pdev);
2090 pci_disable_device(pdev);
2095 * fm10k_remove - Device Removal Routine
2096 * @pdev: PCI device information struct
2098 * fm10k_remove is called by the PCI subsystem to alert the driver
2099 * that it should release a PCI device. The could be caused by a
2100 * Hot-Plug event, or because the driver is going to be removed from
2103 static void fm10k_remove(struct pci_dev *pdev)
2105 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2106 struct net_device *netdev = interface->netdev;
2108 del_timer_sync(&interface->service_timer);
2110 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2111 cancel_work_sync(&interface->service_task);
2113 /* free netdev, this may bounce the interrupts due to setup_tc */
2114 if (netdev->reg_state == NETREG_REGISTERED)
2115 unregister_netdev(netdev);
2118 fm10k_iov_disable(pdev);
2120 /* disable mailbox interrupt */
2121 fm10k_mbx_free_irq(interface);
2123 /* free interrupts */
2124 fm10k_clear_queueing_scheme(interface);
2126 /* remove any debugfs interfaces */
2127 fm10k_dbg_intfc_exit(interface);
2129 if (interface->sw_addr)
2130 iounmap(interface->sw_addr);
2131 iounmap(interface->uc_addr);
2133 free_netdev(netdev);
2135 pci_release_mem_regions(pdev);
2137 pci_disable_pcie_error_reporting(pdev);
2139 pci_disable_device(pdev);
2142 static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2144 /* the watchdog task reads from registers, which might appear like
2145 * a surprise remove if the PCIe device is disabled while we're
2146 * stopped. We stop the watchdog task until after we resume software
2149 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2150 cancel_work_sync(&interface->service_task);
2152 fm10k_prepare_for_reset(interface);
2155 static int fm10k_handle_resume(struct fm10k_intfc *interface)
2157 struct fm10k_hw *hw = &interface->hw;
2160 /* reset statistics starting values */
2161 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2163 err = fm10k_handle_reset(interface);
2167 /* assume host is not ready, to prevent race with watchdog in case we
2168 * actually don't have connection to the switch
2170 interface->host_ready = false;
2171 fm10k_watchdog_host_not_ready(interface);
2173 /* force link to stay down for a second to prevent link flutter */
2174 interface->link_down_event = jiffies + (HZ);
2175 set_bit(__FM10K_LINK_DOWN, &interface->state);
2177 /* clear the service task disable bit to allow service task to start */
2178 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2179 fm10k_service_event_schedule(interface);
2186 * fm10k_resume - Restore device to pre-sleep state
2187 * @pdev: PCI device information struct
2189 * fm10k_resume is called after the system has powered back up from a sleep
2190 * state and is ready to resume operation. This function is meant to restore
2191 * the device back to its pre-sleep state.
2193 static int fm10k_resume(struct pci_dev *pdev)
2195 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2196 struct net_device *netdev = interface->netdev;
2197 struct fm10k_hw *hw = &interface->hw;
2200 pci_set_power_state(pdev, PCI_D0);
2201 pci_restore_state(pdev);
2203 /* pci_restore_state clears dev->state_saved so call
2204 * pci_save_state to restore it.
2206 pci_save_state(pdev);
2208 err = pci_enable_device_mem(pdev);
2210 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2213 pci_set_master(pdev);
2215 pci_wake_from_d3(pdev, false);
2217 /* refresh hw_addr in case it was dropped */
2218 hw->hw_addr = interface->uc_addr;
2220 err = fm10k_handle_resume(interface);
2224 netif_device_attach(netdev);
2230 * fm10k_suspend - Prepare the device for a system sleep state
2231 * @pdev: PCI device information struct
2233 * fm10k_suspend is meant to shutdown the device prior to the system entering
2234 * a sleep state. The fm10k hardware does not support wake on lan so the
2235 * driver simply needs to shut down the device so it is in a low power state.
2237 static int fm10k_suspend(struct pci_dev *pdev,
2238 pm_message_t __always_unused state)
2240 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2241 struct net_device *netdev = interface->netdev;
2244 netif_device_detach(netdev);
2246 fm10k_prepare_suspend(interface);
2248 err = pci_save_state(pdev);
2252 pci_disable_device(pdev);
2253 pci_wake_from_d3(pdev, false);
2254 pci_set_power_state(pdev, PCI_D3hot);
2259 #endif /* CONFIG_PM */
2261 * fm10k_io_error_detected - called when PCI error is detected
2262 * @pdev: Pointer to PCI device
2263 * @state: The current pci connection state
2265 * This function is called after a PCI bus error affecting
2266 * this device has been detected.
2268 static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2269 pci_channel_state_t state)
2271 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2272 struct net_device *netdev = interface->netdev;
2274 netif_device_detach(netdev);
2276 if (state == pci_channel_io_perm_failure)
2277 return PCI_ERS_RESULT_DISCONNECT;
2279 fm10k_prepare_suspend(interface);
2281 /* Request a slot reset. */
2282 return PCI_ERS_RESULT_NEED_RESET;
2286 * fm10k_io_slot_reset - called after the pci bus has been reset.
2287 * @pdev: Pointer to PCI device
2289 * Restart the card from scratch, as if from a cold-boot.
2291 static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2293 pci_ers_result_t result;
2295 if (pci_reenable_device(pdev)) {
2297 "Cannot re-enable PCI device after reset.\n");
2298 result = PCI_ERS_RESULT_DISCONNECT;
2300 pci_set_master(pdev);
2301 pci_restore_state(pdev);
2303 /* After second error pci->state_saved is false, this
2304 * resets it so EEH doesn't break.
2306 pci_save_state(pdev);
2308 pci_wake_from_d3(pdev, false);
2310 result = PCI_ERS_RESULT_RECOVERED;
2313 pci_cleanup_aer_uncorrect_error_status(pdev);
2319 * fm10k_io_resume - called when traffic can start flowing again.
2320 * @pdev: Pointer to PCI device
2322 * This callback is called when the error recovery driver tells us that
2323 * its OK to resume normal operation.
2325 static void fm10k_io_resume(struct pci_dev *pdev)
2327 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2328 struct net_device *netdev = interface->netdev;
2331 err = fm10k_handle_resume(interface);
2334 dev_warn(&pdev->dev,
2335 "fm10k_io_resume failed: %d\n", err);
2337 netif_device_attach(netdev);
2341 * fm10k_io_reset_notify - called when PCI function is reset
2342 * @pdev: Pointer to PCI device
2344 * This callback is called when the PCI function is reset such as from
2345 * /sys/class/net/<enpX>/device/reset or similar. When prepare is true, it
2346 * means we should prepare for a function reset. If prepare is false, it means
2347 * the function reset just occurred.
2349 static void fm10k_io_reset_notify(struct pci_dev *pdev, bool prepare)
2351 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2355 /* warn incase we have any active VF devices */
2356 if (pci_num_vf(pdev))
2357 dev_warn(&pdev->dev,
2358 "PCIe FLR may cause issues for any active VF devices\n");
2360 fm10k_prepare_suspend(interface);
2362 err = fm10k_handle_resume(interface);
2366 dev_warn(&pdev->dev,
2367 "fm10k_io_reset_notify failed: %d\n", err);
2368 netif_device_detach(interface->netdev);
2372 static const struct pci_error_handlers fm10k_err_handler = {
2373 .error_detected = fm10k_io_error_detected,
2374 .slot_reset = fm10k_io_slot_reset,
2375 .resume = fm10k_io_resume,
2376 .reset_notify = fm10k_io_reset_notify,
2379 static struct pci_driver fm10k_driver = {
2380 .name = fm10k_driver_name,
2381 .id_table = fm10k_pci_tbl,
2382 .probe = fm10k_probe,
2383 .remove = fm10k_remove,
2385 .suspend = fm10k_suspend,
2386 .resume = fm10k_resume,
2388 .sriov_configure = fm10k_iov_configure,
2389 .err_handler = &fm10k_err_handler
2393 * fm10k_register_pci_driver - register driver interface
2395 * This function is called on module load in order to register the driver.
2397 int fm10k_register_pci_driver(void)
2399 return pci_register_driver(&fm10k_driver);
2403 * fm10k_unregister_pci_driver - unregister driver interface
2405 * This function is called on module unload in order to remove the driver.
2407 void fm10k_unregister_pci_driver(void)
2409 pci_unregister_driver(&fm10k_driver);