1 /* Intel Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2015 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 = ACCESS_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 BUG_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;
127 /* do nothing if device is still present or hw_addr is set */
128 if (netif_device_present(netdev) || interface->hw.hw_addr)
133 if (netif_running(netdev))
139 static void fm10k_reinit(struct fm10k_intfc *interface)
141 struct net_device *netdev = interface->netdev;
142 struct fm10k_hw *hw = &interface->hw;
145 WARN_ON(in_interrupt());
147 /* put off any impending NetWatchDogTimeout */
148 netdev->trans_start = jiffies;
150 while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
151 usleep_range(1000, 2000);
155 fm10k_iov_suspend(interface->pdev);
157 if (netif_running(netdev))
160 fm10k_mbx_free_irq(interface);
162 /* delay any future reset requests */
163 interface->last_reset = jiffies + (10 * HZ);
165 /* reset and initialize the hardware so it is in a known state */
166 err = hw->mac.ops.reset_hw(hw) ? : hw->mac.ops.init_hw(hw);
168 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
170 /* reassociate interrupts */
171 fm10k_mbx_request_irq(interface);
174 fm10k_ts_reset(interface);
176 if (netif_running(netdev))
179 fm10k_iov_resume(interface->pdev);
183 clear_bit(__FM10K_RESETTING, &interface->state);
186 static void fm10k_reset_subtask(struct fm10k_intfc *interface)
188 if (!(interface->flags & FM10K_FLAG_RESET_REQUESTED))
191 interface->flags &= ~FM10K_FLAG_RESET_REQUESTED;
193 netdev_err(interface->netdev, "Reset interface\n");
195 fm10k_reinit(interface);
199 * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
200 * @interface: board private structure
202 * Configure the SWPRI to PC mapping for the port.
204 static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
206 struct net_device *netdev = interface->netdev;
207 struct fm10k_hw *hw = &interface->hw;
210 /* clear flag indicating update is needed */
211 interface->flags &= ~FM10K_FLAG_SWPRI_CONFIG;
213 /* these registers are only available on the PF */
214 if (hw->mac.type != fm10k_mac_pf)
217 /* configure SWPRI to PC map */
218 for (i = 0; i < FM10K_SWPRI_MAX; i++)
219 fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
220 netdev_get_prio_tc_map(netdev, i));
224 * fm10k_watchdog_update_host_state - Update the link status based on host.
225 * @interface: board private structure
227 static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
229 struct fm10k_hw *hw = &interface->hw;
232 if (test_bit(__FM10K_LINK_DOWN, &interface->state)) {
233 interface->host_ready = false;
234 if (time_is_after_jiffies(interface->link_down_event))
236 clear_bit(__FM10K_LINK_DOWN, &interface->state);
239 if (interface->flags & FM10K_FLAG_SWPRI_CONFIG) {
240 if (rtnl_trylock()) {
241 fm10k_configure_swpri_map(interface);
246 /* lock the mailbox for transmit and receive */
247 fm10k_mbx_lock(interface);
249 err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
250 if (err && time_is_before_jiffies(interface->last_reset))
251 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
254 fm10k_mbx_unlock(interface);
258 * fm10k_mbx_subtask - Process upstream and downstream mailboxes
259 * @interface: board private structure
261 * This function will process both the upstream and downstream mailboxes.
262 * It is necessary for us to hold the rtnl_lock while doing this as the
263 * mailbox accesses are protected by this lock.
265 static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
267 /* process upstream mailbox and update device state */
268 fm10k_watchdog_update_host_state(interface);
270 /* process downstream mailboxes */
271 fm10k_iov_mbx(interface);
275 * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
276 * @interface: board private structure
278 static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
280 struct net_device *netdev = interface->netdev;
282 /* only continue if link state is currently down */
283 if (netif_carrier_ok(netdev))
286 netif_info(interface, drv, netdev, "NIC Link is up\n");
288 netif_carrier_on(netdev);
289 netif_tx_wake_all_queues(netdev);
293 * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
294 * @interface: board private structure
296 static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
298 struct net_device *netdev = interface->netdev;
300 /* only continue if link state is currently up */
301 if (!netif_carrier_ok(netdev))
304 netif_info(interface, drv, netdev, "NIC Link is down\n");
306 netif_carrier_off(netdev);
307 netif_tx_stop_all_queues(netdev);
311 * fm10k_update_stats - Update the board statistics counters.
312 * @interface: board private structure
314 void fm10k_update_stats(struct fm10k_intfc *interface)
316 struct net_device_stats *net_stats = &interface->netdev->stats;
317 struct fm10k_hw *hw = &interface->hw;
318 u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
319 u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
320 u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
321 u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
325 /* do not allow stats update via service task for next second */
326 interface->next_stats_update = jiffies + HZ;
328 /* gather some stats to the interface struct that are per queue */
329 for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
330 struct fm10k_ring *tx_ring = interface->tx_ring[i];
332 restart_queue += tx_ring->tx_stats.restart_queue;
333 tx_busy += tx_ring->tx_stats.tx_busy;
334 tx_csum_errors += tx_ring->tx_stats.csum_err;
335 bytes += tx_ring->stats.bytes;
336 pkts += tx_ring->stats.packets;
339 interface->restart_queue = restart_queue;
340 interface->tx_busy = tx_busy;
341 net_stats->tx_bytes = bytes;
342 net_stats->tx_packets = pkts;
343 interface->tx_csum_errors = tx_csum_errors;
344 /* gather some stats to the interface struct that are per queue */
345 for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
346 struct fm10k_ring *rx_ring = interface->rx_ring[i];
348 bytes += rx_ring->stats.bytes;
349 pkts += rx_ring->stats.packets;
350 alloc_failed += rx_ring->rx_stats.alloc_failed;
351 rx_csum_errors += rx_ring->rx_stats.csum_err;
352 rx_errors += rx_ring->rx_stats.errors;
355 net_stats->rx_bytes = bytes;
356 net_stats->rx_packets = pkts;
357 interface->alloc_failed = alloc_failed;
358 interface->rx_csum_errors = rx_csum_errors;
360 hw->mac.ops.update_hw_stats(hw, &interface->stats);
362 for (i = 0; i < hw->mac.max_queues; i++) {
363 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
365 tx_bytes_nic += q->tx_bytes.count;
366 tx_pkts_nic += q->tx_packets.count;
367 rx_bytes_nic += q->rx_bytes.count;
368 rx_pkts_nic += q->rx_packets.count;
369 rx_drops_nic += q->rx_drops.count;
372 interface->tx_bytes_nic = tx_bytes_nic;
373 interface->tx_packets_nic = tx_pkts_nic;
374 interface->rx_bytes_nic = rx_bytes_nic;
375 interface->rx_packets_nic = rx_pkts_nic;
376 interface->rx_drops_nic = rx_drops_nic;
378 /* Fill out the OS statistics structure */
379 net_stats->rx_errors = rx_errors;
380 net_stats->rx_dropped = interface->stats.nodesc_drop.count;
384 * fm10k_watchdog_flush_tx - flush queues on host not ready
385 * @interface - pointer to the device interface structure
387 static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
389 int some_tx_pending = 0;
392 /* nothing to do if carrier is up */
393 if (netif_carrier_ok(interface->netdev))
396 for (i = 0; i < interface->num_tx_queues; i++) {
397 struct fm10k_ring *tx_ring = interface->tx_ring[i];
399 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
405 /* We've lost link, so the controller stops DMA, but we've got
406 * queued Tx work that's never going to get done, so reset
407 * controller to flush Tx.
410 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
414 * fm10k_watchdog_subtask - check and bring link up
415 * @interface - pointer to the device interface structure
417 static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
419 /* if interface is down do nothing */
420 if (test_bit(__FM10K_DOWN, &interface->state) ||
421 test_bit(__FM10K_RESETTING, &interface->state))
424 if (interface->host_ready)
425 fm10k_watchdog_host_is_ready(interface);
427 fm10k_watchdog_host_not_ready(interface);
429 /* update stats only once every second */
430 if (time_is_before_jiffies(interface->next_stats_update))
431 fm10k_update_stats(interface);
433 /* flush any uncompleted work */
434 fm10k_watchdog_flush_tx(interface);
438 * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
439 * @interface - pointer to the device interface structure
441 * This function serves two purposes. First it strobes the interrupt lines
442 * in order to make certain interrupts are occurring. Secondly it sets the
443 * bits needed to check for TX hangs. As a result we should immediately
444 * determine if a hang has occurred.
446 static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
450 /* If we're down or resetting, just bail */
451 if (test_bit(__FM10K_DOWN, &interface->state) ||
452 test_bit(__FM10K_RESETTING, &interface->state))
455 /* rate limit tx hang checks to only once every 2 seconds */
456 if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
458 interface->next_tx_hang_check = jiffies + (2 * HZ);
460 if (netif_carrier_ok(interface->netdev)) {
461 /* Force detection of hung controller */
462 for (i = 0; i < interface->num_tx_queues; i++)
463 set_check_for_tx_hang(interface->tx_ring[i]);
465 /* Rearm all in-use q_vectors for immediate firing */
466 for (i = 0; i < interface->num_q_vectors; i++) {
467 struct fm10k_q_vector *qv = interface->q_vector[i];
469 if (!qv->tx.count && !qv->rx.count)
471 writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
477 * fm10k_service_task - manages and runs subtasks
478 * @work: pointer to work_struct containing our data
480 static void fm10k_service_task(struct work_struct *work)
482 struct fm10k_intfc *interface;
484 interface = container_of(work, struct fm10k_intfc, service_task);
486 /* tasks always capable of running, but must be rtnl protected */
487 fm10k_mbx_subtask(interface);
488 fm10k_detach_subtask(interface);
489 fm10k_reset_subtask(interface);
491 /* tasks only run when interface is up */
492 fm10k_watchdog_subtask(interface);
493 fm10k_check_hang_subtask(interface);
494 fm10k_ts_tx_subtask(interface);
496 /* release lock on service events to allow scheduling next event */
497 fm10k_service_event_complete(interface);
501 * fm10k_configure_tx_ring - Configure Tx ring after Reset
502 * @interface: board private structure
503 * @ring: structure containing ring specific data
505 * Configure the Tx descriptor ring after a reset.
507 static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
508 struct fm10k_ring *ring)
510 struct fm10k_hw *hw = &interface->hw;
511 u64 tdba = ring->dma;
512 u32 size = ring->count * sizeof(struct fm10k_tx_desc);
513 u32 txint = FM10K_INT_MAP_DISABLE;
514 u32 txdctl = FM10K_TXDCTL_ENABLE | (1 << FM10K_TXDCTL_MAX_TIME_SHIFT);
515 u8 reg_idx = ring->reg_idx;
517 /* disable queue to avoid issues while updating state */
518 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
519 fm10k_write_flush(hw);
521 /* possible poll here to verify ring resources have been cleaned */
523 /* set location and size for descriptor ring */
524 fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
525 fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
526 fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
528 /* reset head and tail pointers */
529 fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
530 fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
532 /* store tail pointer */
533 ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
535 /* reset ntu and ntc to place SW in sync with hardwdare */
536 ring->next_to_clean = 0;
537 ring->next_to_use = 0;
540 if (ring->q_vector) {
541 txint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
542 txint |= FM10K_INT_MAP_TIMER0;
545 fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
547 /* enable use of FTAG bit in Tx descriptor, register is RO for VF */
548 fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
549 FM10K_PFVTCTL_FTAG_DESC_ENABLE);
552 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
556 * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
557 * @interface: board private structure
558 * @ring: structure containing ring specific data
560 * Verify the Tx descriptor ring is ready for transmit.
562 static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
563 struct fm10k_ring *ring)
565 struct fm10k_hw *hw = &interface->hw;
568 u8 reg_idx = ring->reg_idx;
570 /* if we are already enabled just exit */
571 if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
574 /* poll to verify queue is enabled */
576 usleep_range(1000, 2000);
577 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
578 } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
580 netif_err(interface, drv, interface->netdev,
581 "Could not enable Tx Queue %d\n", reg_idx);
585 * fm10k_configure_tx - Configure Transmit Unit after Reset
586 * @interface: board private structure
588 * Configure the Tx unit of the MAC after a reset.
590 static void fm10k_configure_tx(struct fm10k_intfc *interface)
594 /* Setup the HW Tx Head and Tail descriptor pointers */
595 for (i = 0; i < interface->num_tx_queues; i++)
596 fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
598 /* poll here to verify that Tx rings are now enabled */
599 for (i = 0; i < interface->num_tx_queues; i++)
600 fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
604 * fm10k_configure_rx_ring - Configure Rx ring after Reset
605 * @interface: board private structure
606 * @ring: structure containing ring specific data
608 * Configure the Rx descriptor ring after a reset.
610 static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
611 struct fm10k_ring *ring)
613 u64 rdba = ring->dma;
614 struct fm10k_hw *hw = &interface->hw;
615 u32 size = ring->count * sizeof(union fm10k_rx_desc);
616 u32 rxqctl = FM10K_RXQCTL_ENABLE | FM10K_RXQCTL_PF;
617 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
618 u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
619 u32 rxint = FM10K_INT_MAP_DISABLE;
620 u8 rx_pause = interface->rx_pause;
621 u8 reg_idx = ring->reg_idx;
623 /* disable queue to avoid issues while updating state */
624 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), 0);
625 fm10k_write_flush(hw);
627 /* possible poll here to verify ring resources have been cleaned */
629 /* set location and size for descriptor ring */
630 fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
631 fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
632 fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
634 /* reset head and tail pointers */
635 fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
636 fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
638 /* store tail pointer */
639 ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
641 /* reset ntu and ntc to place SW in sync with hardwdare */
642 ring->next_to_clean = 0;
643 ring->next_to_use = 0;
644 ring->next_to_alloc = 0;
646 /* Configure the Rx buffer size for one buff without split */
647 srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
649 /* Configure the Rx ring to suppress loopback packets */
650 srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
651 fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
653 /* Enable drop on empty */
655 if (interface->pfc_en)
656 rx_pause = interface->pfc_en;
658 if (!(rx_pause & (1 << ring->qos_pc)))
659 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
661 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
663 /* assign default VLAN to queue */
664 ring->vid = hw->mac.default_vid;
667 if (ring->q_vector) {
668 rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
669 rxint |= FM10K_INT_MAP_TIMER1;
672 fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
675 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
677 /* place buffers on ring for receive data */
678 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
682 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
683 * @interface: board private structure
685 * Configure the drop enable bits for the Rx rings.
687 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
689 struct fm10k_hw *hw = &interface->hw;
690 u8 rx_pause = interface->rx_pause;
694 if (interface->pfc_en)
695 rx_pause = interface->pfc_en;
698 for (i = 0; i < interface->num_rx_queues; i++) {
699 struct fm10k_ring *ring = interface->rx_ring[i];
700 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
701 u8 reg_idx = ring->reg_idx;
703 if (!(rx_pause & (1 << ring->qos_pc)))
704 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
706 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
711 * fm10k_configure_dglort - Configure Receive DGLORT after reset
712 * @interface: board private structure
714 * Configure the DGLORT description and RSS tables.
716 static void fm10k_configure_dglort(struct fm10k_intfc *interface)
718 struct fm10k_dglort_cfg dglort = { 0 };
719 struct fm10k_hw *hw = &interface->hw;
723 /* Fill out hash function seeds */
724 for (i = 0; i < FM10K_RSSRK_SIZE; i++)
725 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
727 /* Write RETA table to hardware */
728 for (i = 0; i < FM10K_RETA_SIZE; i++)
729 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
731 /* Generate RSS hash based on packet types, TCP/UDP
732 * port numbers and/or IPv4/v6 src and dst addresses
734 mrqc = FM10K_MRQC_IPV4 |
735 FM10K_MRQC_TCP_IPV4 |
739 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV4_UDP)
740 mrqc |= FM10K_MRQC_UDP_IPV4;
741 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV6_UDP)
742 mrqc |= FM10K_MRQC_UDP_IPV6;
744 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
746 /* configure default DGLORT mapping for RSS/DCB */
747 dglort.inner_rss = 1;
748 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
749 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
750 hw->mac.ops.configure_dglort_map(hw, &dglort);
752 /* assign GLORT per queue for queue mapped testing */
753 if (interface->glort_count > 64) {
754 memset(&dglort, 0, sizeof(dglort));
755 dglort.inner_rss = 1;
756 dglort.glort = interface->glort + 64;
757 dglort.idx = fm10k_dglort_pf_queue;
758 dglort.queue_l = fls(interface->num_rx_queues - 1);
759 hw->mac.ops.configure_dglort_map(hw, &dglort);
762 /* assign glort value for RSS/DCB specific to this interface */
763 memset(&dglort, 0, sizeof(dglort));
764 dglort.inner_rss = 1;
765 dglort.glort = interface->glort;
766 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
767 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
768 /* configure DGLORT mapping for RSS/DCB */
769 dglort.idx = fm10k_dglort_pf_rss;
770 if (interface->l2_accel)
771 dglort.shared_l = fls(interface->l2_accel->size);
772 hw->mac.ops.configure_dglort_map(hw, &dglort);
776 * fm10k_configure_rx - Configure Receive Unit after Reset
777 * @interface: board private structure
779 * Configure the Rx unit of the MAC after a reset.
781 static void fm10k_configure_rx(struct fm10k_intfc *interface)
785 /* Configure SWPRI to PC map */
786 fm10k_configure_swpri_map(interface);
788 /* Configure RSS and DGLORT map */
789 fm10k_configure_dglort(interface);
791 /* Setup the HW Rx Head and Tail descriptor pointers */
792 for (i = 0; i < interface->num_rx_queues; i++)
793 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
795 /* possible poll here to verify that Rx rings are now enabled */
798 static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
800 struct fm10k_q_vector *q_vector;
803 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
804 q_vector = interface->q_vector[q_idx];
805 napi_enable(&q_vector->napi);
809 static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
811 struct fm10k_q_vector *q_vector = data;
813 if (q_vector->rx.count || q_vector->tx.count)
814 napi_schedule(&q_vector->napi);
819 static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
821 struct fm10k_intfc *interface = data;
822 struct fm10k_hw *hw = &interface->hw;
823 struct fm10k_mbx_info *mbx = &hw->mbx;
825 /* re-enable mailbox interrupt and indicate 20us delay */
826 fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
827 FM10K_ITR_ENABLE | FM10K_MBX_INT_DELAY);
829 /* service upstream mailbox */
830 if (fm10k_mbx_trylock(interface)) {
831 mbx->ops.process(hw, mbx);
832 fm10k_mbx_unlock(interface);
835 hw->mac.get_host_state = 1;
836 fm10k_service_event_schedule(interface);
841 #ifdef CONFIG_NET_POLL_CONTROLLER
843 * fm10k_netpoll - A Polling 'interrupt' handler
844 * @netdev: network interface device structure
846 * This is used by netconsole to send skbs without having to re-enable
847 * interrupts. It's not called while the normal interrupt routine is executing.
849 void fm10k_netpoll(struct net_device *netdev)
851 struct fm10k_intfc *interface = netdev_priv(netdev);
854 /* if interface is down do nothing */
855 if (test_bit(__FM10K_DOWN, &interface->state))
858 for (i = 0; i < interface->num_q_vectors; i++)
859 fm10k_msix_clean_rings(0, interface->q_vector[i]);
863 #define FM10K_ERR_MSG(type) case (type): error = #type; break
864 static void fm10k_print_fault(struct fm10k_intfc *interface, int type,
865 struct fm10k_fault *fault)
867 struct pci_dev *pdev = interface->pdev;
871 case FM10K_PCA_FAULT:
872 switch (fault->type) {
874 error = "Unknown PCA error";
876 FM10K_ERR_MSG(PCA_NO_FAULT);
877 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
878 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
879 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
880 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
881 FM10K_ERR_MSG(PCA_POISONED_TLP);
882 FM10K_ERR_MSG(PCA_TLP_ABORT);
885 case FM10K_THI_FAULT:
886 switch (fault->type) {
888 error = "Unknown THI error";
890 FM10K_ERR_MSG(THI_NO_FAULT);
891 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
894 case FM10K_FUM_FAULT:
895 switch (fault->type) {
897 error = "Unknown FUM error";
899 FM10K_ERR_MSG(FUM_NO_FAULT);
900 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
901 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
902 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
903 FM10K_ERR_MSG(FUM_RO_ERROR);
904 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
905 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
906 FM10K_ERR_MSG(FUM_INVALID_TYPE);
907 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
908 FM10K_ERR_MSG(FUM_INVALID_BE);
909 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
913 error = "Undocumented fault";
918 "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
919 error, fault->address, fault->specinfo,
920 PCI_SLOT(fault->func), PCI_FUNC(fault->func));
923 static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
925 struct fm10k_hw *hw = &interface->hw;
926 struct fm10k_fault fault = { 0 };
929 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
931 eicr >>= 1, type += FM10K_FAULT_SIZE) {
932 /* only check if there is an error reported */
936 /* retrieve fault info */
937 err = hw->mac.ops.get_fault(hw, type, &fault);
939 dev_err(&interface->pdev->dev,
940 "error reading fault\n");
944 fm10k_print_fault(interface, type, &fault);
948 static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
950 struct fm10k_hw *hw = &interface->hw;
951 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
955 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
958 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
960 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
962 if (maxholdq & (1 << 31)) {
963 if (q < FM10K_MAX_QUEUES_PF) {
964 interface->rx_overrun_pf++;
965 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
967 interface->rx_overrun_vf++;
981 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
983 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
987 static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
989 struct fm10k_intfc *interface = data;
990 struct fm10k_hw *hw = &interface->hw;
991 struct fm10k_mbx_info *mbx = &hw->mbx;
994 /* unmask any set bits related to this interrupt */
995 eicr = fm10k_read_reg(hw, FM10K_EICR);
996 fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
997 FM10K_EICR_SWITCHREADY |
998 FM10K_EICR_SWITCHNOTREADY));
1000 /* report any faults found to the message log */
1001 fm10k_report_fault(interface, eicr);
1003 /* reset any queues disabled due to receiver overrun */
1004 fm10k_reset_drop_on_empty(interface, eicr);
1006 /* service mailboxes */
1007 if (fm10k_mbx_trylock(interface)) {
1008 mbx->ops.process(hw, mbx);
1009 /* handle VFLRE events */
1010 fm10k_iov_event(interface);
1011 fm10k_mbx_unlock(interface);
1014 /* if switch toggled state we should reset GLORTs */
1015 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1016 /* force link down for at least 4 seconds */
1017 interface->link_down_event = jiffies + (4 * HZ);
1018 set_bit(__FM10K_LINK_DOWN, &interface->state);
1020 /* reset dglort_map back to no config */
1021 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1024 /* we should validate host state after interrupt event */
1025 hw->mac.get_host_state = 1;
1027 /* validate host state, and handle VF mailboxes in the service task */
1028 fm10k_service_event_schedule(interface);
1030 /* re-enable mailbox interrupt and indicate 20us delay */
1031 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1032 FM10K_ITR_ENABLE | FM10K_MBX_INT_DELAY);
1037 void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1039 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1040 struct fm10k_hw *hw = &interface->hw;
1043 /* disconnect the mailbox */
1044 hw->mbx.ops.disconnect(hw, &hw->mbx);
1046 /* disable Mailbox cause */
1047 if (hw->mac.type == fm10k_mac_pf) {
1048 fm10k_write_reg(hw, FM10K_EIMR,
1049 FM10K_EIMR_DISABLE(PCA_FAULT) |
1050 FM10K_EIMR_DISABLE(FUM_FAULT) |
1051 FM10K_EIMR_DISABLE(MAILBOX) |
1052 FM10K_EIMR_DISABLE(SWITCHREADY) |
1053 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1054 FM10K_EIMR_DISABLE(SRAMERROR) |
1055 FM10K_EIMR_DISABLE(VFLR) |
1056 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1057 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1059 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1062 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1064 free_irq(entry->vector, interface);
1067 static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1068 struct fm10k_mbx_info *mbx)
1070 bool vlan_override = hw->mac.vlan_override;
1071 u16 default_vid = hw->mac.default_vid;
1072 struct fm10k_intfc *interface;
1075 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1079 interface = container_of(hw, struct fm10k_intfc, hw);
1081 /* MAC was changed so we need reset */
1082 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1083 memcmp(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN))
1084 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1086 /* VLAN override was changed, or default VLAN changed */
1087 if ((vlan_override != hw->mac.vlan_override) ||
1088 (default_vid != hw->mac.default_vid))
1089 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1094 static s32 fm10k_1588_msg_vf(struct fm10k_hw *hw, u32 **results,
1095 struct fm10k_mbx_info __always_unused *mbx)
1097 struct fm10k_intfc *interface;
1101 err = fm10k_tlv_attr_get_u64(results[FM10K_1588_MSG_TIMESTAMP],
1106 interface = container_of(hw, struct fm10k_intfc, hw);
1108 fm10k_ts_tx_hwtstamp(interface, 0, timestamp);
1113 /* generic error handler for mailbox issues */
1114 static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1115 struct fm10k_mbx_info __always_unused *mbx)
1117 struct fm10k_intfc *interface;
1118 struct pci_dev *pdev;
1120 interface = container_of(hw, struct fm10k_intfc, hw);
1121 pdev = interface->pdev;
1123 dev_err(&pdev->dev, "Unknown message ID %u\n",
1124 **results & FM10K_TLV_ID_MASK);
1129 static const struct fm10k_msg_data vf_mbx_data[] = {
1130 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1131 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1132 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1133 FM10K_VF_MSG_1588_HANDLER(fm10k_1588_msg_vf),
1134 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1137 static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1139 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1140 struct net_device *dev = interface->netdev;
1141 struct fm10k_hw *hw = &interface->hw;
1144 /* Use timer0 for interrupt moderation on the mailbox */
1145 u32 itr = FM10K_INT_MAP_TIMER0 | entry->entry;
1147 /* register mailbox handlers */
1148 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1152 /* request the IRQ */
1153 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1154 dev->name, interface);
1156 netif_err(interface, probe, dev,
1157 "request_irq for msix_mbx failed: %d\n", err);
1161 /* map all of the interrupt sources */
1162 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1164 /* enable interrupt */
1165 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1170 static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1171 struct fm10k_mbx_info *mbx)
1173 struct fm10k_intfc *interface;
1174 u32 dglort_map = hw->mac.dglort_map;
1177 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1181 interface = container_of(hw, struct fm10k_intfc, hw);
1183 /* we need to reset if port count was just updated */
1184 if (dglort_map != hw->mac.dglort_map)
1185 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1190 static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1191 struct fm10k_mbx_info __always_unused *mbx)
1193 struct fm10k_intfc *interface;
1198 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1203 /* extract values from the pvid update */
1204 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1205 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1207 /* if glort is not valid return error */
1208 if (!fm10k_glort_valid_pf(hw, glort))
1209 return FM10K_ERR_PARAM;
1211 /* verify VID is valid */
1212 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1213 return FM10K_ERR_PARAM;
1215 interface = container_of(hw, struct fm10k_intfc, hw);
1217 /* check to see if this belongs to one of the VFs */
1218 err = fm10k_iov_update_pvid(interface, glort, pvid);
1222 /* we need to reset if default VLAN was just updated */
1223 if (pvid != hw->mac.default_vid)
1224 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1226 hw->mac.default_vid = pvid;
1231 static s32 fm10k_1588_msg_pf(struct fm10k_hw *hw, u32 **results,
1232 struct fm10k_mbx_info __always_unused *mbx)
1234 struct fm10k_swapi_1588_timestamp timestamp;
1235 struct fm10k_iov_data *iov_data;
1236 struct fm10k_intfc *interface;
1240 err = fm10k_tlv_attr_get_le_struct(
1241 results[FM10K_PF_ATTR_ID_1588_TIMESTAMP],
1242 ×tamp, sizeof(timestamp));
1246 interface = container_of(hw, struct fm10k_intfc, hw);
1248 if (timestamp.dglort) {
1249 fm10k_ts_tx_hwtstamp(interface, timestamp.dglort,
1250 le64_to_cpu(timestamp.egress));
1254 /* either dglort or sglort must be set */
1255 if (!timestamp.sglort)
1256 return FM10K_ERR_PARAM;
1258 /* verify GLORT is at least one of the ones we own */
1259 sglort = le16_to_cpu(timestamp.sglort);
1260 if (!fm10k_glort_valid_pf(hw, sglort))
1261 return FM10K_ERR_PARAM;
1263 if (sglort == interface->glort) {
1264 fm10k_ts_tx_hwtstamp(interface, 0,
1265 le64_to_cpu(timestamp.ingress));
1269 /* if there is no iov_data then there is no mailboxes to process */
1270 if (!ACCESS_ONCE(interface->iov_data))
1271 return FM10K_ERR_PARAM;
1275 /* notify VF if this timestamp belongs to it */
1276 iov_data = interface->iov_data;
1277 vf_idx = (hw->mac.dglort_map & FM10K_DGLORTMAP_NONE) - sglort;
1279 if (!iov_data || vf_idx >= iov_data->num_vfs) {
1280 err = FM10K_ERR_PARAM;
1284 err = hw->iov.ops.report_timestamp(hw, &iov_data->vf_info[vf_idx],
1285 le64_to_cpu(timestamp.ingress));
1293 static const struct fm10k_msg_data pf_mbx_data[] = {
1294 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1295 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1296 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1297 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1298 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1299 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1300 FM10K_PF_MSG_1588_TIMESTAMP_HANDLER(fm10k_1588_msg_pf),
1301 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1304 static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1306 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1307 struct net_device *dev = interface->netdev;
1308 struct fm10k_hw *hw = &interface->hw;
1311 /* Use timer0 for interrupt moderation on the mailbox */
1312 u32 mbx_itr = FM10K_INT_MAP_TIMER0 | entry->entry;
1313 u32 other_itr = FM10K_INT_MAP_IMMEDIATE | entry->entry;
1315 /* register mailbox handlers */
1316 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1320 /* request the IRQ */
1321 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1322 dev->name, interface);
1324 netif_err(interface, probe, dev,
1325 "request_irq for msix_mbx failed: %d\n", err);
1329 /* Enable interrupts w/ no moderation for "other" interrupts */
1330 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_PCIeFault), other_itr);
1331 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_SwitchUpDown), other_itr);
1332 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_SRAM), other_itr);
1333 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_MaxHoldTime), other_itr);
1334 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_VFLR), other_itr);
1336 /* Enable interrupts w/ moderation for mailbox */
1337 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_Mailbox), mbx_itr);
1339 /* Enable individual interrupt causes */
1340 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1341 FM10K_EIMR_ENABLE(FUM_FAULT) |
1342 FM10K_EIMR_ENABLE(MAILBOX) |
1343 FM10K_EIMR_ENABLE(SWITCHREADY) |
1344 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1345 FM10K_EIMR_ENABLE(SRAMERROR) |
1346 FM10K_EIMR_ENABLE(VFLR) |
1347 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1349 /* enable interrupt */
1350 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1355 int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1357 struct fm10k_hw *hw = &interface->hw;
1360 /* enable Mailbox cause */
1361 if (hw->mac.type == fm10k_mac_pf)
1362 err = fm10k_mbx_request_irq_pf(interface);
1364 err = fm10k_mbx_request_irq_vf(interface);
1366 /* connect mailbox */
1368 err = hw->mbx.ops.connect(hw, &hw->mbx);
1374 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1375 * @interface: board private structure
1377 * Release all interrupts associated with this interface
1379 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1381 int vector = interface->num_q_vectors;
1382 struct fm10k_hw *hw = &interface->hw;
1383 struct msix_entry *entry;
1385 entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
1388 struct fm10k_q_vector *q_vector;
1392 q_vector = interface->q_vector[vector];
1394 if (!q_vector->tx.count && !q_vector->rx.count)
1397 /* disable interrupts */
1399 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1401 free_irq(entry->vector, q_vector);
1406 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1407 * @interface: board private structure
1409 * Attempts to configure interrupts using the best available
1410 * capabilities of the hardware and kernel.
1412 int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1414 struct net_device *dev = interface->netdev;
1415 struct fm10k_hw *hw = &interface->hw;
1416 struct msix_entry *entry;
1420 entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
1422 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1423 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1425 /* name the vector */
1426 if (q_vector->tx.count && q_vector->rx.count) {
1427 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1428 "%s-TxRx-%d", dev->name, ri++);
1430 } else if (q_vector->rx.count) {
1431 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1432 "%s-rx-%d", dev->name, ri++);
1433 } else if (q_vector->tx.count) {
1434 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1435 "%s-tx-%d", dev->name, ti++);
1437 /* skip this unused q_vector */
1441 /* Assign ITR register to q_vector */
1442 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1443 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1444 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1446 /* request the IRQ */
1447 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1448 q_vector->name, q_vector);
1450 netif_err(interface, probe, dev,
1451 "request_irq failed for MSIX interrupt Error: %d\n",
1456 /* Enable q_vector */
1457 writel(FM10K_ITR_ENABLE, q_vector->itr);
1465 /* wind through the ring freeing all entries and vectors */
1467 struct fm10k_q_vector *q_vector;
1471 q_vector = interface->q_vector[vector];
1473 if (!q_vector->tx.count && !q_vector->rx.count)
1476 /* disable interrupts */
1478 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1480 free_irq(entry->vector, q_vector);
1486 void fm10k_up(struct fm10k_intfc *interface)
1488 struct fm10k_hw *hw = &interface->hw;
1490 /* Enable Tx/Rx DMA */
1491 hw->mac.ops.start_hw(hw);
1493 /* configure Tx descriptor rings */
1494 fm10k_configure_tx(interface);
1496 /* configure Rx descriptor rings */
1497 fm10k_configure_rx(interface);
1499 /* configure interrupts */
1500 hw->mac.ops.update_int_moderator(hw);
1502 /* clear down bit to indicate we are ready to go */
1503 clear_bit(__FM10K_DOWN, &interface->state);
1505 /* enable polling cleanups */
1506 fm10k_napi_enable_all(interface);
1508 /* re-establish Rx filters */
1509 fm10k_restore_rx_state(interface);
1511 /* enable transmits */
1512 netif_tx_start_all_queues(interface->netdev);
1514 /* kick off the service timer now */
1515 hw->mac.get_host_state = 1;
1516 mod_timer(&interface->service_timer, jiffies);
1519 static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1521 struct fm10k_q_vector *q_vector;
1524 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1525 q_vector = interface->q_vector[q_idx];
1526 napi_disable(&q_vector->napi);
1530 void fm10k_down(struct fm10k_intfc *interface)
1532 struct net_device *netdev = interface->netdev;
1533 struct fm10k_hw *hw = &interface->hw;
1535 /* signal that we are down to the interrupt handler and service task */
1536 set_bit(__FM10K_DOWN, &interface->state);
1538 /* call carrier off first to avoid false dev_watchdog timeouts */
1539 netif_carrier_off(netdev);
1541 /* disable transmits */
1542 netif_tx_stop_all_queues(netdev);
1543 netif_tx_disable(netdev);
1545 /* reset Rx filters */
1546 fm10k_reset_rx_state(interface);
1548 /* allow 10ms for device to quiesce */
1549 usleep_range(10000, 20000);
1551 /* disable polling routines */
1552 fm10k_napi_disable_all(interface);
1554 /* capture stats one last time before stopping interface */
1555 fm10k_update_stats(interface);
1557 /* Disable DMA engine for Tx/Rx */
1558 hw->mac.ops.stop_hw(hw);
1560 /* free any buffers still on the rings */
1561 fm10k_clean_all_tx_rings(interface);
1565 * fm10k_sw_init - Initialize general software structures
1566 * @interface: host interface private structure to initialize
1568 * fm10k_sw_init initializes the interface private data structure.
1569 * Fields are initialized based on PCI device information and
1570 * OS network device settings (MTU size).
1572 static int fm10k_sw_init(struct fm10k_intfc *interface,
1573 const struct pci_device_id *ent)
1575 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1576 struct fm10k_hw *hw = &interface->hw;
1577 struct pci_dev *pdev = interface->pdev;
1578 struct net_device *netdev = interface->netdev;
1579 u32 rss_key[FM10K_RSSRK_SIZE];
1583 /* initialize back pointer */
1584 hw->back = interface;
1585 hw->hw_addr = interface->uc_addr;
1587 /* PCI config space info */
1588 hw->vendor_id = pdev->vendor;
1589 hw->device_id = pdev->device;
1590 hw->revision_id = pdev->revision;
1591 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1592 hw->subsystem_device_id = pdev->subsystem_device;
1595 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1596 hw->mac.type = fi->mac;
1598 /* Setup IOV handlers */
1600 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1602 /* Set common capability flags and settings */
1603 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
1604 interface->ring_feature[RING_F_RSS].limit = rss;
1605 fi->get_invariants(hw);
1607 /* pick up the PCIe bus settings for reporting later */
1608 if (hw->mac.ops.get_bus_info)
1609 hw->mac.ops.get_bus_info(hw);
1611 /* limit the usable DMA range */
1612 if (hw->mac.ops.set_dma_mask)
1613 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
1615 /* update netdev with DMA restrictions */
1616 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
1617 netdev->features |= NETIF_F_HIGHDMA;
1618 netdev->vlan_features |= NETIF_F_HIGHDMA;
1621 /* delay any future reset requests */
1622 interface->last_reset = jiffies + (10 * HZ);
1624 /* reset and initialize the hardware so it is in a known state */
1625 err = hw->mac.ops.reset_hw(hw) ? : hw->mac.ops.init_hw(hw);
1627 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
1631 /* initialize hardware statistics */
1632 hw->mac.ops.update_hw_stats(hw, &interface->stats);
1634 /* Set upper limit on IOV VFs that can be allocated */
1635 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
1637 /* Start with random Ethernet address */
1638 eth_random_addr(hw->mac.addr);
1640 /* Initialize MAC address from hardware */
1641 err = hw->mac.ops.read_mac_addr(hw);
1643 dev_warn(&pdev->dev,
1644 "Failed to obtain MAC address defaulting to random\n");
1645 /* tag address assignment as random */
1646 netdev->addr_assign_type |= NET_ADDR_RANDOM;
1649 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
1650 memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
1652 if (!is_valid_ether_addr(netdev->perm_addr)) {
1653 dev_err(&pdev->dev, "Invalid MAC Address\n");
1657 /* assign BAR 4 resources for use with PTP */
1658 if (fm10k_read_reg(hw, FM10K_CTRL) & FM10K_CTRL_BAR4_ALLOWED)
1659 interface->sw_addr = ioremap(pci_resource_start(pdev, 4),
1660 pci_resource_len(pdev, 4));
1661 hw->sw_addr = interface->sw_addr;
1663 /* Only the PF can support VXLAN and NVGRE offloads */
1664 if (hw->mac.type != fm10k_mac_pf) {
1665 netdev->hw_enc_features = 0;
1666 netdev->features &= ~NETIF_F_GSO_UDP_TUNNEL;
1667 netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL;
1670 /* initialize DCBNL interface */
1671 fm10k_dcbnl_set_ops(netdev);
1673 /* Initialize service timer and service task */
1674 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
1675 setup_timer(&interface->service_timer, &fm10k_service_timer,
1676 (unsigned long)interface);
1677 INIT_WORK(&interface->service_task, fm10k_service_task);
1679 /* kick off service timer now, even when interface is down */
1680 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
1682 /* Intitialize timestamp data */
1683 fm10k_ts_init(interface);
1685 /* set default ring sizes */
1686 interface->tx_ring_count = FM10K_DEFAULT_TXD;
1687 interface->rx_ring_count = FM10K_DEFAULT_RXD;
1689 /* set default interrupt moderation */
1690 interface->tx_itr = FM10K_ITR_10K;
1691 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_ITR_20K;
1693 /* initialize vxlan_port list */
1694 INIT_LIST_HEAD(&interface->vxlan_port);
1696 netdev_rss_key_fill(rss_key, sizeof(rss_key));
1697 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
1699 /* Start off interface as being down */
1700 set_bit(__FM10K_DOWN, &interface->state);
1705 static void fm10k_slot_warn(struct fm10k_intfc *interface)
1707 struct device *dev = &interface->pdev->dev;
1708 struct fm10k_hw *hw = &interface->hw;
1710 if (hw->mac.ops.is_slot_appropriate(hw))
1714 "For optimal performance, a %s %s slot is recommended.\n",
1715 (hw->bus_caps.width == fm10k_bus_width_pcie_x1 ? "x1" :
1716 hw->bus_caps.width == fm10k_bus_width_pcie_x4 ? "x4" :
1718 (hw->bus_caps.speed == fm10k_bus_speed_2500 ? "2.5GT/s" :
1719 hw->bus_caps.speed == fm10k_bus_speed_5000 ? "5.0GT/s" :
1722 "A slot with more lanes and/or higher speed is suggested.\n");
1726 * fm10k_probe - Device Initialization Routine
1727 * @pdev: PCI device information struct
1728 * @ent: entry in fm10k_pci_tbl
1730 * Returns 0 on success, negative on failure
1732 * fm10k_probe initializes an interface identified by a pci_dev structure.
1733 * The OS initialization, configuring of the interface private structure,
1734 * and a hardware reset occur.
1736 static int fm10k_probe(struct pci_dev *pdev,
1737 const struct pci_device_id *ent)
1739 struct net_device *netdev;
1740 struct fm10k_intfc *interface;
1741 struct fm10k_hw *hw;
1745 err = pci_enable_device_mem(pdev);
1749 /* By default fm10k only supports a 48 bit DMA mask */
1750 dma_mask = DMA_BIT_MASK(48) | dma_get_required_mask(&pdev->dev);
1752 if ((dma_mask <= DMA_BIT_MASK(32)) ||
1753 dma_set_mask_and_coherent(&pdev->dev, dma_mask)) {
1754 dma_mask &= DMA_BIT_MASK(32);
1756 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1757 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1759 err = dma_set_coherent_mask(&pdev->dev,
1763 "No usable DMA configuration, aborting\n");
1769 err = pci_request_selected_regions(pdev,
1770 pci_select_bars(pdev,
1775 "pci_request_selected_regions failed 0x%x\n", err);
1779 pci_enable_pcie_error_reporting(pdev);
1781 pci_set_master(pdev);
1782 pci_save_state(pdev);
1784 netdev = fm10k_alloc_netdev();
1787 goto err_alloc_netdev;
1790 SET_NETDEV_DEV(netdev, &pdev->dev);
1792 interface = netdev_priv(netdev);
1793 pci_set_drvdata(pdev, interface);
1795 interface->netdev = netdev;
1796 interface->pdev = pdev;
1797 hw = &interface->hw;
1799 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
1800 FM10K_UC_ADDR_SIZE);
1801 if (!interface->uc_addr) {
1806 err = fm10k_sw_init(interface, ent);
1810 /* enable debugfs support */
1811 fm10k_dbg_intfc_init(interface);
1813 err = fm10k_init_queueing_scheme(interface);
1817 err = fm10k_mbx_request_irq(interface);
1819 goto err_mbx_interrupt;
1821 /* final check of hardware state before registering the interface */
1822 err = fm10k_hw_ready(interface);
1826 err = register_netdev(netdev);
1830 /* carrier off reporting is important to ethtool even BEFORE open */
1831 netif_carrier_off(netdev);
1833 /* stop all the transmit queues from transmitting until link is up */
1834 netif_tx_stop_all_queues(netdev);
1836 /* Register PTP interface */
1837 fm10k_ptp_register(interface);
1839 /* print bus type/speed/width info */
1840 dev_info(&pdev->dev, "(PCI Express:%s Width: %s Payload: %s)\n",
1841 (hw->bus.speed == fm10k_bus_speed_8000 ? "8.0GT/s" :
1842 hw->bus.speed == fm10k_bus_speed_5000 ? "5.0GT/s" :
1843 hw->bus.speed == fm10k_bus_speed_2500 ? "2.5GT/s" :
1845 (hw->bus.width == fm10k_bus_width_pcie_x8 ? "x8" :
1846 hw->bus.width == fm10k_bus_width_pcie_x4 ? "x4" :
1847 hw->bus.width == fm10k_bus_width_pcie_x1 ? "x1" :
1849 (hw->bus.payload == fm10k_bus_payload_128 ? "128B" :
1850 hw->bus.payload == fm10k_bus_payload_256 ? "256B" :
1851 hw->bus.payload == fm10k_bus_payload_512 ? "512B" :
1854 /* print warning for non-optimal configurations */
1855 fm10k_slot_warn(interface);
1857 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
1858 fm10k_iov_configure(pdev, 0);
1860 /* clear the service task disable bit to allow service task to start */
1861 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
1866 fm10k_mbx_free_irq(interface);
1868 fm10k_clear_queueing_scheme(interface);
1870 if (interface->sw_addr)
1871 iounmap(interface->sw_addr);
1872 iounmap(interface->uc_addr);
1874 free_netdev(netdev);
1876 pci_release_selected_regions(pdev,
1877 pci_select_bars(pdev, IORESOURCE_MEM));
1880 pci_disable_device(pdev);
1885 * fm10k_remove - Device Removal Routine
1886 * @pdev: PCI device information struct
1888 * fm10k_remove is called by the PCI subsystem to alert the driver
1889 * that it should release a PCI device. The could be caused by a
1890 * Hot-Plug event, or because the driver is going to be removed from
1893 static void fm10k_remove(struct pci_dev *pdev)
1895 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
1896 struct net_device *netdev = interface->netdev;
1898 del_timer_sync(&interface->service_timer);
1900 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
1901 cancel_work_sync(&interface->service_task);
1903 /* free netdev, this may bounce the interrupts due to setup_tc */
1904 if (netdev->reg_state == NETREG_REGISTERED)
1905 unregister_netdev(netdev);
1907 /* cleanup timestamp handling */
1908 fm10k_ptp_unregister(interface);
1911 fm10k_iov_disable(pdev);
1913 /* disable mailbox interrupt */
1914 fm10k_mbx_free_irq(interface);
1916 /* free interrupts */
1917 fm10k_clear_queueing_scheme(interface);
1919 /* remove any debugfs interfaces */
1920 fm10k_dbg_intfc_exit(interface);
1922 if (interface->sw_addr)
1923 iounmap(interface->sw_addr);
1924 iounmap(interface->uc_addr);
1926 free_netdev(netdev);
1928 pci_release_selected_regions(pdev,
1929 pci_select_bars(pdev, IORESOURCE_MEM));
1931 pci_disable_pcie_error_reporting(pdev);
1933 pci_disable_device(pdev);
1938 * fm10k_resume - Restore device to pre-sleep state
1939 * @pdev: PCI device information struct
1941 * fm10k_resume is called after the system has powered back up from a sleep
1942 * state and is ready to resume operation. This function is meant to restore
1943 * the device back to its pre-sleep state.
1945 static int fm10k_resume(struct pci_dev *pdev)
1947 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
1948 struct net_device *netdev = interface->netdev;
1949 struct fm10k_hw *hw = &interface->hw;
1952 pci_set_power_state(pdev, PCI_D0);
1953 pci_restore_state(pdev);
1955 /* pci_restore_state clears dev->state_saved so call
1956 * pci_save_state to restore it.
1958 pci_save_state(pdev);
1960 err = pci_enable_device_mem(pdev);
1962 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
1965 pci_set_master(pdev);
1967 pci_wake_from_d3(pdev, false);
1969 /* refresh hw_addr in case it was dropped */
1970 hw->hw_addr = interface->uc_addr;
1972 /* reset hardware to known state */
1973 err = hw->mac.ops.init_hw(&interface->hw);
1977 /* reset statistics starting values */
1978 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
1981 fm10k_ts_reset(interface);
1985 err = fm10k_init_queueing_scheme(interface);
1987 fm10k_mbx_request_irq(interface);
1988 if (netif_running(netdev))
1989 err = fm10k_open(netdev);
1997 /* restore SR-IOV interface */
1998 fm10k_iov_resume(pdev);
2000 netif_device_attach(netdev);
2006 * fm10k_suspend - Prepare the device for a system sleep state
2007 * @pdev: PCI device information struct
2009 * fm10k_suspend is meant to shutdown the device prior to the system entering
2010 * a sleep state. The fm10k hardware does not support wake on lan so the
2011 * driver simply needs to shut down the device so it is in a low power state.
2013 static int fm10k_suspend(struct pci_dev *pdev,
2014 pm_message_t __always_unused state)
2016 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2017 struct net_device *netdev = interface->netdev;
2020 netif_device_detach(netdev);
2022 fm10k_iov_suspend(pdev);
2026 if (netif_running(netdev))
2027 fm10k_close(netdev);
2029 fm10k_mbx_free_irq(interface);
2031 fm10k_clear_queueing_scheme(interface);
2035 err = pci_save_state(pdev);
2039 pci_disable_device(pdev);
2040 pci_wake_from_d3(pdev, false);
2041 pci_set_power_state(pdev, PCI_D3hot);
2046 #endif /* CONFIG_PM */
2048 * fm10k_io_error_detected - called when PCI error is detected
2049 * @pdev: Pointer to PCI device
2050 * @state: The current pci connection state
2052 * This function is called after a PCI bus error affecting
2053 * this device has been detected.
2055 static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2056 pci_channel_state_t state)
2058 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2059 struct net_device *netdev = interface->netdev;
2061 netif_device_detach(netdev);
2063 if (state == pci_channel_io_perm_failure)
2064 return PCI_ERS_RESULT_DISCONNECT;
2066 if (netif_running(netdev))
2067 fm10k_close(netdev);
2069 fm10k_mbx_free_irq(interface);
2071 pci_disable_device(pdev);
2073 /* Request a slot reset. */
2074 return PCI_ERS_RESULT_NEED_RESET;
2078 * fm10k_io_slot_reset - called after the pci bus has been reset.
2079 * @pdev: Pointer to PCI device
2081 * Restart the card from scratch, as if from a cold-boot.
2083 static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2085 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2086 pci_ers_result_t result;
2088 if (pci_enable_device_mem(pdev)) {
2090 "Cannot re-enable PCI device after reset.\n");
2091 result = PCI_ERS_RESULT_DISCONNECT;
2093 pci_set_master(pdev);
2094 pci_restore_state(pdev);
2096 /* After second error pci->state_saved is false, this
2097 * resets it so EEH doesn't break.
2099 pci_save_state(pdev);
2101 pci_wake_from_d3(pdev, false);
2103 /* refresh hw_addr in case it was dropped */
2104 interface->hw.hw_addr = interface->uc_addr;
2106 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
2107 fm10k_service_event_schedule(interface);
2109 result = PCI_ERS_RESULT_RECOVERED;
2112 pci_cleanup_aer_uncorrect_error_status(pdev);
2118 * fm10k_io_resume - called when traffic can start flowing again.
2119 * @pdev: Pointer to PCI device
2121 * This callback is called when the error recovery driver tells us that
2122 * its OK to resume normal operation.
2124 static void fm10k_io_resume(struct pci_dev *pdev)
2126 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2127 struct net_device *netdev = interface->netdev;
2128 struct fm10k_hw *hw = &interface->hw;
2131 /* reset hardware to known state */
2132 hw->mac.ops.init_hw(&interface->hw);
2134 /* reset statistics starting values */
2135 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2137 /* reassociate interrupts */
2138 fm10k_mbx_request_irq(interface);
2141 fm10k_ts_reset(interface);
2143 if (netif_running(netdev))
2144 err = fm10k_open(netdev);
2146 /* final check of hardware state before registering the interface */
2147 err = err ? : fm10k_hw_ready(interface);
2150 netif_device_attach(netdev);
2153 static const struct pci_error_handlers fm10k_err_handler = {
2154 .error_detected = fm10k_io_error_detected,
2155 .slot_reset = fm10k_io_slot_reset,
2156 .resume = fm10k_io_resume,
2159 static struct pci_driver fm10k_driver = {
2160 .name = fm10k_driver_name,
2161 .id_table = fm10k_pci_tbl,
2162 .probe = fm10k_probe,
2163 .remove = fm10k_remove,
2165 .suspend = fm10k_suspend,
2166 .resume = fm10k_resume,
2168 .sriov_configure = fm10k_iov_configure,
2169 .err_handler = &fm10k_err_handler
2173 * fm10k_register_pci_driver - register driver interface
2175 * This funciton is called on module load in order to register the driver.
2177 int fm10k_register_pci_driver(void)
2179 return pci_register_driver(&fm10k_driver);
2183 * fm10k_unregister_pci_driver - unregister driver interface
2185 * This funciton is called on module unload in order to remove the driver.
2187 void fm10k_unregister_pci_driver(void)
2189 pci_unregister_driver(&fm10k_driver);