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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2019 Intel Corporation. */
3
4#include <linux/module.h>
5#include <linux/interrupt.h>
6#include <linux/aer.h>
7
8#include "fm10k.h"
9
10static const struct fm10k_info *fm10k_info_tbl[] = {
11 [fm10k_device_pf] = &fm10k_pf_info,
12 [fm10k_device_vf] = &fm10k_vf_info,
13};
14
15/*
16 * fm10k_pci_tbl - PCI Device ID Table
17 *
18 * Wildcard entries (PCI_ANY_ID) should come last
19 * Last entry must be all 0s
20 *
21 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
22 * Class, Class Mask, private data (not used) }
23 */
24static const struct pci_device_id fm10k_pci_tbl[] = {
25 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
26 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_SDI_FM10420_QDA2), fm10k_device_pf },
27 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_SDI_FM10420_DA2), fm10k_device_pf },
28 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
29 /* required last entry */
30 { 0, }
31};
32MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
33
34u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
35{
36 struct fm10k_intfc *interface = hw->back;
37 u16 value = 0;
38
39 if (FM10K_REMOVED(hw->hw_addr))
40 return ~value;
41
42 pci_read_config_word(interface->pdev, reg, &value);
43 if (value == 0xFFFF)
44 fm10k_write_flush(hw);
45
46 return value;
47}
48
49u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
50{
51 u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
52 u32 value = 0;
53
54 if (FM10K_REMOVED(hw_addr))
55 return ~value;
56
57 value = readl(&hw_addr[reg]);
58 if (!(~value) && (!reg || !(~readl(hw_addr)))) {
59 struct fm10k_intfc *interface = hw->back;
60 struct net_device *netdev = interface->netdev;
61
62 hw->hw_addr = NULL;
63 netif_device_detach(netdev);
64 netdev_err(netdev, "PCIe link lost, device now detached\n");
65 }
66
67 return value;
68}
69
70static int fm10k_hw_ready(struct fm10k_intfc *interface)
71{
72 struct fm10k_hw *hw = &interface->hw;
73
74 fm10k_write_flush(hw);
75
76 return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
77}
78
79/**
80 * fm10k_macvlan_schedule - Schedule MAC/VLAN queue task
81 * @interface: fm10k private interface structure
82 *
83 * Schedule the MAC/VLAN queue monitor task. If the MAC/VLAN task cannot be
84 * started immediately, request that it be restarted when possible.
85 */
86void fm10k_macvlan_schedule(struct fm10k_intfc *interface)
87{
88 /* Avoid processing the MAC/VLAN queue when the service task is
89 * disabled, or when we're resetting the device.
90 */
91 if (!test_bit(__FM10K_MACVLAN_DISABLE, interface->state) &&
92 !test_and_set_bit(__FM10K_MACVLAN_SCHED, interface->state)) {
93 clear_bit(__FM10K_MACVLAN_REQUEST, interface->state);
94 /* We delay the actual start of execution in order to allow
95 * multiple MAC/VLAN updates to accumulate before handling
96 * them, and to allow some time to let the mailbox drain
97 * between runs.
98 */
99 queue_delayed_work(fm10k_workqueue,
100 &interface->macvlan_task, 10);
101 } else {
102 set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
103 }
104}
105
106/**
107 * fm10k_stop_macvlan_task - Stop the MAC/VLAN queue monitor
108 * @interface: fm10k private interface structure
109 *
110 * Wait until the MAC/VLAN queue task has stopped, and cancel any future
111 * requests.
112 */
113static void fm10k_stop_macvlan_task(struct fm10k_intfc *interface)
114{
115 /* Disable the MAC/VLAN work item */
116 set_bit(__FM10K_MACVLAN_DISABLE, interface->state);
117
118 /* Make sure we waited until any current invocations have stopped */
119 cancel_delayed_work_sync(&interface->macvlan_task);
120
121 /* We set the __FM10K_MACVLAN_SCHED bit when we schedule the task.
122 * However, it may not be unset of the MAC/VLAN task never actually
123 * got a chance to run. Since we've canceled the task here, and it
124 * cannot be rescheuled right now, we need to ensure the scheduled bit
125 * gets unset.
126 */
127 clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
128}
129
130/**
131 * fm10k_resume_macvlan_task - Restart the MAC/VLAN queue monitor
132 * @interface: fm10k private interface structure
133 *
134 * Clear the __FM10K_MACVLAN_DISABLE bit and, if a request occurred, schedule
135 * the MAC/VLAN work monitor.
136 */
137static void fm10k_resume_macvlan_task(struct fm10k_intfc *interface)
138{
139 /* Re-enable the MAC/VLAN work item */
140 clear_bit(__FM10K_MACVLAN_DISABLE, interface->state);
141
142 /* We might have received a MAC/VLAN request while disabled. If so,
143 * kick off the queue now.
144 */
145 if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
146 fm10k_macvlan_schedule(interface);
147}
148
149void fm10k_service_event_schedule(struct fm10k_intfc *interface)
150{
151 if (!test_bit(__FM10K_SERVICE_DISABLE, interface->state) &&
152 !test_and_set_bit(__FM10K_SERVICE_SCHED, interface->state)) {
153 clear_bit(__FM10K_SERVICE_REQUEST, interface->state);
154 queue_work(fm10k_workqueue, &interface->service_task);
155 } else {
156 set_bit(__FM10K_SERVICE_REQUEST, interface->state);
157 }
158}
159
160static void fm10k_service_event_complete(struct fm10k_intfc *interface)
161{
162 WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, interface->state));
163
164 /* flush memory to make sure state is correct before next watchog */
165 smp_mb__before_atomic();
166 clear_bit(__FM10K_SERVICE_SCHED, interface->state);
167
168 /* If a service event was requested since we started, immediately
169 * re-schedule now. This ensures we don't drop a request until the
170 * next timer event.
171 */
172 if (test_bit(__FM10K_SERVICE_REQUEST, interface->state))
173 fm10k_service_event_schedule(interface);
174}
175
176static void fm10k_stop_service_event(struct fm10k_intfc *interface)
177{
178 set_bit(__FM10K_SERVICE_DISABLE, interface->state);
179 cancel_work_sync(&interface->service_task);
180
181 /* It's possible that cancel_work_sync stopped the service task from
182 * running before it could actually start. In this case the
183 * __FM10K_SERVICE_SCHED bit will never be cleared. Since we know that
184 * the service task cannot be running at this point, we need to clear
185 * the scheduled bit, as otherwise the service task may never be
186 * restarted.
187 */
188 clear_bit(__FM10K_SERVICE_SCHED, interface->state);
189}
190
191static void fm10k_start_service_event(struct fm10k_intfc *interface)
192{
193 clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
194 fm10k_service_event_schedule(interface);
195}
196
197/**
198 * fm10k_service_timer - Timer Call-back
199 * @t: pointer to timer data
200 **/
201static void fm10k_service_timer(struct timer_list *t)
202{
203 struct fm10k_intfc *interface = from_timer(interface, t,
204 service_timer);
205
206 /* Reset the timer */
207 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
208
209 fm10k_service_event_schedule(interface);
210}
211
212/**
213 * fm10k_prepare_for_reset - Prepare the driver and device for a pending reset
214 * @interface: fm10k private data structure
215 *
216 * This function prepares for a device reset by shutting as much down as we
217 * can. It does nothing and returns false if __FM10K_RESETTING was already set
218 * prior to calling this function. It returns true if it actually did work.
219 */
220static bool fm10k_prepare_for_reset(struct fm10k_intfc *interface)
221{
222 struct net_device *netdev = interface->netdev;
223
224 /* put off any impending NetWatchDogTimeout */
225 netif_trans_update(netdev);
226
227 /* Nothing to do if a reset is already in progress */
228 if (test_and_set_bit(__FM10K_RESETTING, interface->state))
229 return false;
230
231 /* As the MAC/VLAN task will be accessing registers it must not be
232 * running while we reset. Although the task will not be scheduled
233 * once we start resetting it may already be running
234 */
235 fm10k_stop_macvlan_task(interface);
236
237 rtnl_lock();
238
239 fm10k_iov_suspend(interface->pdev);
240
241 if (netif_running(netdev))
242 fm10k_close(netdev);
243
244 fm10k_mbx_free_irq(interface);
245
246 /* free interrupts */
247 fm10k_clear_queueing_scheme(interface);
248
249 /* delay any future reset requests */
250 interface->last_reset = jiffies + (10 * HZ);
251
252 rtnl_unlock();
253
254 return true;
255}
256
257static int fm10k_handle_reset(struct fm10k_intfc *interface)
258{
259 struct net_device *netdev = interface->netdev;
260 struct fm10k_hw *hw = &interface->hw;
261 int err;
262
263 WARN_ON(!test_bit(__FM10K_RESETTING, interface->state));
264
265 rtnl_lock();
266
267 pci_set_master(interface->pdev);
268
269 /* reset and initialize the hardware so it is in a known state */
270 err = hw->mac.ops.reset_hw(hw);
271 if (err) {
272 dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
273 goto reinit_err;
274 }
275
276 err = hw->mac.ops.init_hw(hw);
277 if (err) {
278 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
279 goto reinit_err;
280 }
281
282 err = fm10k_init_queueing_scheme(interface);
283 if (err) {
284 dev_err(&interface->pdev->dev,
285 "init_queueing_scheme failed: %d\n", err);
286 goto reinit_err;
287 }
288
289 /* re-associate interrupts */
290 err = fm10k_mbx_request_irq(interface);
291 if (err)
292 goto err_mbx_irq;
293
294 err = fm10k_hw_ready(interface);
295 if (err)
296 goto err_open;
297
298 /* update hardware address for VFs if perm_addr has changed */
299 if (hw->mac.type == fm10k_mac_vf) {
300 if (is_valid_ether_addr(hw->mac.perm_addr)) {
301 ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
302 ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
303 eth_hw_addr_set(netdev, hw->mac.perm_addr);
304 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
305 }
306
307 if (hw->mac.vlan_override)
308 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
309 else
310 netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
311 }
312
313 err = netif_running(netdev) ? fm10k_open(netdev) : 0;
314 if (err)
315 goto err_open;
316
317 fm10k_iov_resume(interface->pdev);
318
319 rtnl_unlock();
320
321 fm10k_resume_macvlan_task(interface);
322
323 clear_bit(__FM10K_RESETTING, interface->state);
324
325 return err;
326err_open:
327 fm10k_mbx_free_irq(interface);
328err_mbx_irq:
329 fm10k_clear_queueing_scheme(interface);
330reinit_err:
331 netif_device_detach(netdev);
332
333 rtnl_unlock();
334
335 clear_bit(__FM10K_RESETTING, interface->state);
336
337 return err;
338}
339
340static void fm10k_detach_subtask(struct fm10k_intfc *interface)
341{
342 struct net_device *netdev = interface->netdev;
343 u32 __iomem *hw_addr;
344 u32 value;
345
346 /* do nothing if netdev is still present or hw_addr is set */
347 if (netif_device_present(netdev) || interface->hw.hw_addr)
348 return;
349
350 /* We've lost the PCIe register space, and can no longer access the
351 * device. Shut everything except the detach subtask down and prepare
352 * to reset the device in case we recover. If we actually prepare for
353 * reset, indicate that we're detached.
354 */
355 if (fm10k_prepare_for_reset(interface))
356 set_bit(__FM10K_RESET_DETACHED, interface->state);
357
358 /* check the real address space to see if we've recovered */
359 hw_addr = READ_ONCE(interface->uc_addr);
360 value = readl(hw_addr);
361 if (~value) {
362 int err;
363
364 /* Make sure the reset was initiated because we detached,
365 * otherwise we might race with a different reset flow.
366 */
367 if (!test_and_clear_bit(__FM10K_RESET_DETACHED,
368 interface->state))
369 return;
370
371 /* Restore the hardware address */
372 interface->hw.hw_addr = interface->uc_addr;
373
374 /* PCIe link has been restored, and the device is active
375 * again. Restore everything and reset the device.
376 */
377 err = fm10k_handle_reset(interface);
378 if (err) {
379 netdev_err(netdev, "Unable to reset device: %d\n", err);
380 interface->hw.hw_addr = NULL;
381 return;
382 }
383
384 /* Re-attach the netdev */
385 netif_device_attach(netdev);
386 netdev_warn(netdev, "PCIe link restored, device now attached\n");
387 return;
388 }
389}
390
391static void fm10k_reset_subtask(struct fm10k_intfc *interface)
392{
393 int err;
394
395 if (!test_and_clear_bit(FM10K_FLAG_RESET_REQUESTED,
396 interface->flags))
397 return;
398
399 /* If another thread has already prepared to reset the device, we
400 * should not attempt to handle a reset here, since we'd race with
401 * that thread. This may happen if we suspend the device or if the
402 * PCIe link is lost. In this case, we'll just ignore the RESET
403 * request, as it will (eventually) be taken care of when the thread
404 * which actually started the reset is finished.
405 */
406 if (!fm10k_prepare_for_reset(interface))
407 return;
408
409 netdev_err(interface->netdev, "Reset interface\n");
410
411 err = fm10k_handle_reset(interface);
412 if (err)
413 dev_err(&interface->pdev->dev,
414 "fm10k_handle_reset failed: %d\n", err);
415}
416
417/**
418 * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
419 * @interface: board private structure
420 *
421 * Configure the SWPRI to PC mapping for the port.
422 **/
423static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
424{
425 struct net_device *netdev = interface->netdev;
426 struct fm10k_hw *hw = &interface->hw;
427 int i;
428
429 /* clear flag indicating update is needed */
430 clear_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
431
432 /* these registers are only available on the PF */
433 if (hw->mac.type != fm10k_mac_pf)
434 return;
435
436 /* configure SWPRI to PC map */
437 for (i = 0; i < FM10K_SWPRI_MAX; i++)
438 fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
439 netdev_get_prio_tc_map(netdev, i));
440}
441
442/**
443 * fm10k_watchdog_update_host_state - Update the link status based on host.
444 * @interface: board private structure
445 **/
446static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
447{
448 struct fm10k_hw *hw = &interface->hw;
449 s32 err;
450
451 if (test_bit(__FM10K_LINK_DOWN, interface->state)) {
452 interface->host_ready = false;
453 if (time_is_after_jiffies(interface->link_down_event))
454 return;
455 clear_bit(__FM10K_LINK_DOWN, interface->state);
456 }
457
458 if (test_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags)) {
459 if (rtnl_trylock()) {
460 fm10k_configure_swpri_map(interface);
461 rtnl_unlock();
462 }
463 }
464
465 /* lock the mailbox for transmit and receive */
466 fm10k_mbx_lock(interface);
467
468 err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
469 if (err && time_is_before_jiffies(interface->last_reset))
470 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
471
472 /* free the lock */
473 fm10k_mbx_unlock(interface);
474}
475
476/**
477 * fm10k_mbx_subtask - Process upstream and downstream mailboxes
478 * @interface: board private structure
479 *
480 * This function will process both the upstream and downstream mailboxes.
481 **/
482static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
483{
484 /* If we're resetting, bail out */
485 if (test_bit(__FM10K_RESETTING, interface->state))
486 return;
487
488 /* process upstream mailbox and update device state */
489 fm10k_watchdog_update_host_state(interface);
490
491 /* process downstream mailboxes */
492 fm10k_iov_mbx(interface);
493}
494
495/**
496 * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
497 * @interface: board private structure
498 **/
499static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
500{
501 struct net_device *netdev = interface->netdev;
502
503 /* only continue if link state is currently down */
504 if (netif_carrier_ok(netdev))
505 return;
506
507 netif_info(interface, drv, netdev, "NIC Link is up\n");
508
509 netif_carrier_on(netdev);
510 netif_tx_wake_all_queues(netdev);
511}
512
513/**
514 * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
515 * @interface: board private structure
516 **/
517static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
518{
519 struct net_device *netdev = interface->netdev;
520
521 /* only continue if link state is currently up */
522 if (!netif_carrier_ok(netdev))
523 return;
524
525 netif_info(interface, drv, netdev, "NIC Link is down\n");
526
527 netif_carrier_off(netdev);
528 netif_tx_stop_all_queues(netdev);
529}
530
531/**
532 * fm10k_update_stats - Update the board statistics counters.
533 * @interface: board private structure
534 **/
535void fm10k_update_stats(struct fm10k_intfc *interface)
536{
537 struct net_device_stats *net_stats = &interface->netdev->stats;
538 struct fm10k_hw *hw = &interface->hw;
539 u64 hw_csum_tx_good = 0, hw_csum_rx_good = 0, rx_length_errors = 0;
540 u64 rx_switch_errors = 0, rx_drops = 0, rx_pp_errors = 0;
541 u64 rx_link_errors = 0;
542 u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
543 u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
544 u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
545 u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
546 u64 bytes, pkts;
547 int i;
548
549 /* ensure only one thread updates stats at a time */
550 if (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
551 return;
552
553 /* do not allow stats update via service task for next second */
554 interface->next_stats_update = jiffies + HZ;
555
556 /* gather some stats to the interface struct that are per queue */
557 for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
558 struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]);
559
560 if (!tx_ring)
561 continue;
562
563 restart_queue += tx_ring->tx_stats.restart_queue;
564 tx_busy += tx_ring->tx_stats.tx_busy;
565 tx_csum_errors += tx_ring->tx_stats.csum_err;
566 bytes += tx_ring->stats.bytes;
567 pkts += tx_ring->stats.packets;
568 hw_csum_tx_good += tx_ring->tx_stats.csum_good;
569 }
570
571 interface->restart_queue = restart_queue;
572 interface->tx_busy = tx_busy;
573 net_stats->tx_bytes = bytes;
574 net_stats->tx_packets = pkts;
575 interface->tx_csum_errors = tx_csum_errors;
576 interface->hw_csum_tx_good = hw_csum_tx_good;
577
578 /* gather some stats to the interface struct that are per queue */
579 for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
580 struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]);
581
582 if (!rx_ring)
583 continue;
584
585 bytes += rx_ring->stats.bytes;
586 pkts += rx_ring->stats.packets;
587 alloc_failed += rx_ring->rx_stats.alloc_failed;
588 rx_csum_errors += rx_ring->rx_stats.csum_err;
589 rx_errors += rx_ring->rx_stats.errors;
590 hw_csum_rx_good += rx_ring->rx_stats.csum_good;
591 rx_switch_errors += rx_ring->rx_stats.switch_errors;
592 rx_drops += rx_ring->rx_stats.drops;
593 rx_pp_errors += rx_ring->rx_stats.pp_errors;
594 rx_link_errors += rx_ring->rx_stats.link_errors;
595 rx_length_errors += rx_ring->rx_stats.length_errors;
596 }
597
598 net_stats->rx_bytes = bytes;
599 net_stats->rx_packets = pkts;
600 interface->alloc_failed = alloc_failed;
601 interface->rx_csum_errors = rx_csum_errors;
602 interface->hw_csum_rx_good = hw_csum_rx_good;
603 interface->rx_switch_errors = rx_switch_errors;
604 interface->rx_drops = rx_drops;
605 interface->rx_pp_errors = rx_pp_errors;
606 interface->rx_link_errors = rx_link_errors;
607 interface->rx_length_errors = rx_length_errors;
608
609 hw->mac.ops.update_hw_stats(hw, &interface->stats);
610
611 for (i = 0; i < hw->mac.max_queues; i++) {
612 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
613
614 tx_bytes_nic += q->tx_bytes.count;
615 tx_pkts_nic += q->tx_packets.count;
616 rx_bytes_nic += q->rx_bytes.count;
617 rx_pkts_nic += q->rx_packets.count;
618 rx_drops_nic += q->rx_drops.count;
619 }
620
621 interface->tx_bytes_nic = tx_bytes_nic;
622 interface->tx_packets_nic = tx_pkts_nic;
623 interface->rx_bytes_nic = rx_bytes_nic;
624 interface->rx_packets_nic = rx_pkts_nic;
625 interface->rx_drops_nic = rx_drops_nic;
626
627 /* Fill out the OS statistics structure */
628 net_stats->rx_errors = rx_errors;
629 net_stats->rx_dropped = interface->stats.nodesc_drop.count;
630
631 /* Update VF statistics */
632 fm10k_iov_update_stats(interface);
633
634 clear_bit(__FM10K_UPDATING_STATS, interface->state);
635}
636
637/**
638 * fm10k_watchdog_flush_tx - flush queues on host not ready
639 * @interface: pointer to the device interface structure
640 **/
641static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
642{
643 int some_tx_pending = 0;
644 int i;
645
646 /* nothing to do if carrier is up */
647 if (netif_carrier_ok(interface->netdev))
648 return;
649
650 for (i = 0; i < interface->num_tx_queues; i++) {
651 struct fm10k_ring *tx_ring = interface->tx_ring[i];
652
653 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
654 some_tx_pending = 1;
655 break;
656 }
657 }
658
659 /* We've lost link, so the controller stops DMA, but we've got
660 * queued Tx work that's never going to get done, so reset
661 * controller to flush Tx.
662 */
663 if (some_tx_pending)
664 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
665}
666
667/**
668 * fm10k_watchdog_subtask - check and bring link up
669 * @interface: pointer to the device interface structure
670 **/
671static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
672{
673 /* if interface is down do nothing */
674 if (test_bit(__FM10K_DOWN, interface->state) ||
675 test_bit(__FM10K_RESETTING, interface->state))
676 return;
677
678 if (interface->host_ready)
679 fm10k_watchdog_host_is_ready(interface);
680 else
681 fm10k_watchdog_host_not_ready(interface);
682
683 /* update stats only once every second */
684 if (time_is_before_jiffies(interface->next_stats_update))
685 fm10k_update_stats(interface);
686
687 /* flush any uncompleted work */
688 fm10k_watchdog_flush_tx(interface);
689}
690
691/**
692 * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
693 * @interface: pointer to the device interface structure
694 *
695 * This function serves two purposes. First it strobes the interrupt lines
696 * in order to make certain interrupts are occurring. Secondly it sets the
697 * bits needed to check for TX hangs. As a result we should immediately
698 * determine if a hang has occurred.
699 */
700static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
701{
702 /* If we're down or resetting, just bail */
703 if (test_bit(__FM10K_DOWN, interface->state) ||
704 test_bit(__FM10K_RESETTING, interface->state))
705 return;
706
707 /* rate limit tx hang checks to only once every 2 seconds */
708 if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
709 return;
710 interface->next_tx_hang_check = jiffies + (2 * HZ);
711
712 if (netif_carrier_ok(interface->netdev)) {
713 int i;
714
715 /* Force detection of hung controller */
716 for (i = 0; i < interface->num_tx_queues; i++)
717 set_check_for_tx_hang(interface->tx_ring[i]);
718
719 /* Rearm all in-use q_vectors for immediate firing */
720 for (i = 0; i < interface->num_q_vectors; i++) {
721 struct fm10k_q_vector *qv = interface->q_vector[i];
722
723 if (!qv->tx.count && !qv->rx.count)
724 continue;
725 writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
726 }
727 }
728}
729
730/**
731 * fm10k_service_task - manages and runs subtasks
732 * @work: pointer to work_struct containing our data
733 **/
734static void fm10k_service_task(struct work_struct *work)
735{
736 struct fm10k_intfc *interface;
737
738 interface = container_of(work, struct fm10k_intfc, service_task);
739
740 /* Check whether we're detached first */
741 fm10k_detach_subtask(interface);
742
743 /* tasks run even when interface is down */
744 fm10k_mbx_subtask(interface);
745 fm10k_reset_subtask(interface);
746
747 /* tasks only run when interface is up */
748 fm10k_watchdog_subtask(interface);
749 fm10k_check_hang_subtask(interface);
750
751 /* release lock on service events to allow scheduling next event */
752 fm10k_service_event_complete(interface);
753}
754
755/**
756 * fm10k_macvlan_task - send queued MAC/VLAN requests to switch manager
757 * @work: pointer to work_struct containing our data
758 *
759 * This work item handles sending MAC/VLAN updates to the switch manager. When
760 * the interface is up, it will attempt to queue mailbox messages to the
761 * switch manager requesting updates for MAC/VLAN pairs. If the Tx fifo of the
762 * mailbox is full, it will reschedule itself to try again in a short while.
763 * This ensures that the driver does not overload the switch mailbox with too
764 * many simultaneous requests, causing an unnecessary reset.
765 **/
766static void fm10k_macvlan_task(struct work_struct *work)
767{
768 struct fm10k_macvlan_request *item;
769 struct fm10k_intfc *interface;
770 struct delayed_work *dwork;
771 struct list_head *requests;
772 struct fm10k_hw *hw;
773 unsigned long flags;
774
775 dwork = to_delayed_work(work);
776 interface = container_of(dwork, struct fm10k_intfc, macvlan_task);
777 hw = &interface->hw;
778 requests = &interface->macvlan_requests;
779
780 do {
781 /* Pop the first item off the list */
782 spin_lock_irqsave(&interface->macvlan_lock, flags);
783 item = list_first_entry_or_null(requests,
784 struct fm10k_macvlan_request,
785 list);
786 if (item)
787 list_del_init(&item->list);
788
789 spin_unlock_irqrestore(&interface->macvlan_lock, flags);
790
791 /* We have no more items to process */
792 if (!item)
793 goto done;
794
795 fm10k_mbx_lock(interface);
796
797 /* Check that we have plenty of space to send the message. We
798 * want to ensure that the mailbox stays low enough to avoid a
799 * change in the host state, otherwise we may see spurious
800 * link up / link down notifications.
801 */
802 if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU + 5)) {
803 hw->mbx.ops.process(hw, &hw->mbx);
804 set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
805 fm10k_mbx_unlock(interface);
806
807 /* Put the request back on the list */
808 spin_lock_irqsave(&interface->macvlan_lock, flags);
809 list_add(&item->list, requests);
810 spin_unlock_irqrestore(&interface->macvlan_lock, flags);
811 break;
812 }
813
814 switch (item->type) {
815 case FM10K_MC_MAC_REQUEST:
816 hw->mac.ops.update_mc_addr(hw,
817 item->mac.glort,
818 item->mac.addr,
819 item->mac.vid,
820 item->set);
821 break;
822 case FM10K_UC_MAC_REQUEST:
823 hw->mac.ops.update_uc_addr(hw,
824 item->mac.glort,
825 item->mac.addr,
826 item->mac.vid,
827 item->set,
828 0);
829 break;
830 case FM10K_VLAN_REQUEST:
831 hw->mac.ops.update_vlan(hw,
832 item->vlan.vid,
833 item->vlan.vsi,
834 item->set);
835 break;
836 default:
837 break;
838 }
839
840 fm10k_mbx_unlock(interface);
841
842 /* Free the item now that we've sent the update */
843 kfree(item);
844 } while (true);
845
846done:
847 WARN_ON(!test_bit(__FM10K_MACVLAN_SCHED, interface->state));
848
849 /* flush memory to make sure state is correct */
850 smp_mb__before_atomic();
851 clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
852
853 /* If a MAC/VLAN request was scheduled since we started, we should
854 * re-schedule. However, there is no reason to re-schedule if there is
855 * no work to do.
856 */
857 if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
858 fm10k_macvlan_schedule(interface);
859}
860
861/**
862 * fm10k_configure_tx_ring - Configure Tx ring after Reset
863 * @interface: board private structure
864 * @ring: structure containing ring specific data
865 *
866 * Configure the Tx descriptor ring after a reset.
867 **/
868static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
869 struct fm10k_ring *ring)
870{
871 struct fm10k_hw *hw = &interface->hw;
872 u64 tdba = ring->dma;
873 u32 size = ring->count * sizeof(struct fm10k_tx_desc);
874 u32 txint = FM10K_INT_MAP_DISABLE;
875 u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE;
876 u8 reg_idx = ring->reg_idx;
877
878 /* disable queue to avoid issues while updating state */
879 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
880 fm10k_write_flush(hw);
881
882 /* possible poll here to verify ring resources have been cleaned */
883
884 /* set location and size for descriptor ring */
885 fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
886 fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
887 fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
888
889 /* reset head and tail pointers */
890 fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
891 fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
892
893 /* store tail pointer */
894 ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
895
896 /* reset ntu and ntc to place SW in sync with hardware */
897 ring->next_to_clean = 0;
898 ring->next_to_use = 0;
899
900 /* Map interrupt */
901 if (ring->q_vector) {
902 txint = ring->q_vector->v_idx + NON_Q_VECTORS;
903 txint |= FM10K_INT_MAP_TIMER0;
904 }
905
906 fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
907
908 /* enable use of FTAG bit in Tx descriptor, register is RO for VF */
909 fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
910 FM10K_PFVTCTL_FTAG_DESC_ENABLE);
911
912 /* Initialize XPS */
913 if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, ring->state) &&
914 ring->q_vector)
915 netif_set_xps_queue(ring->netdev,
916 &ring->q_vector->affinity_mask,
917 ring->queue_index);
918
919 /* enable queue */
920 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
921}
922
923/**
924 * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
925 * @interface: board private structure
926 * @ring: structure containing ring specific data
927 *
928 * Verify the Tx descriptor ring is ready for transmit.
929 **/
930static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
931 struct fm10k_ring *ring)
932{
933 struct fm10k_hw *hw = &interface->hw;
934 int wait_loop = 10;
935 u32 txdctl;
936 u8 reg_idx = ring->reg_idx;
937
938 /* if we are already enabled just exit */
939 if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
940 return;
941
942 /* poll to verify queue is enabled */
943 do {
944 usleep_range(1000, 2000);
945 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
946 } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
947 if (!wait_loop)
948 netif_err(interface, drv, interface->netdev,
949 "Could not enable Tx Queue %d\n", reg_idx);
950}
951
952/**
953 * fm10k_configure_tx - Configure Transmit Unit after Reset
954 * @interface: board private structure
955 *
956 * Configure the Tx unit of the MAC after a reset.
957 **/
958static void fm10k_configure_tx(struct fm10k_intfc *interface)
959{
960 int i;
961
962 /* Setup the HW Tx Head and Tail descriptor pointers */
963 for (i = 0; i < interface->num_tx_queues; i++)
964 fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
965
966 /* poll here to verify that Tx rings are now enabled */
967 for (i = 0; i < interface->num_tx_queues; i++)
968 fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
969}
970
971/**
972 * fm10k_configure_rx_ring - Configure Rx ring after Reset
973 * @interface: board private structure
974 * @ring: structure containing ring specific data
975 *
976 * Configure the Rx descriptor ring after a reset.
977 **/
978static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
979 struct fm10k_ring *ring)
980{
981 u64 rdba = ring->dma;
982 struct fm10k_hw *hw = &interface->hw;
983 u32 size = ring->count * sizeof(union fm10k_rx_desc);
984 u32 rxqctl, rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
985 u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
986 u32 rxint = FM10K_INT_MAP_DISABLE;
987 u8 rx_pause = interface->rx_pause;
988 u8 reg_idx = ring->reg_idx;
989
990 /* disable queue to avoid issues while updating state */
991 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
992 rxqctl &= ~FM10K_RXQCTL_ENABLE;
993 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
994 fm10k_write_flush(hw);
995
996 /* possible poll here to verify ring resources have been cleaned */
997
998 /* set location and size for descriptor ring */
999 fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1000 fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
1001 fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
1002
1003 /* reset head and tail pointers */
1004 fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
1005 fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
1006
1007 /* store tail pointer */
1008 ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
1009
1010 /* reset ntu and ntc to place SW in sync with hardware */
1011 ring->next_to_clean = 0;
1012 ring->next_to_use = 0;
1013 ring->next_to_alloc = 0;
1014
1015 /* Configure the Rx buffer size for one buff without split */
1016 srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
1017
1018 /* Configure the Rx ring to suppress loopback packets */
1019 srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
1020 fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
1021
1022 /* Enable drop on empty */
1023#ifdef CONFIG_DCB
1024 if (interface->pfc_en)
1025 rx_pause = interface->pfc_en;
1026#endif
1027 if (!(rx_pause & BIT(ring->qos_pc)))
1028 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1029
1030 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1031
1032 /* assign default VLAN to queue */
1033 ring->vid = hw->mac.default_vid;
1034
1035 /* if we have an active VLAN, disable default VLAN ID */
1036 if (test_bit(hw->mac.default_vid, interface->active_vlans))
1037 ring->vid |= FM10K_VLAN_CLEAR;
1038
1039 /* Map interrupt */
1040 if (ring->q_vector) {
1041 rxint = ring->q_vector->v_idx + NON_Q_VECTORS;
1042 rxint |= FM10K_INT_MAP_TIMER1;
1043 }
1044
1045 fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
1046
1047 /* enable queue */
1048 rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
1049 rxqctl |= FM10K_RXQCTL_ENABLE;
1050 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
1051
1052 /* place buffers on ring for receive data */
1053 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
1054}
1055
1056/**
1057 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
1058 * @interface: board private structure
1059 *
1060 * Configure the drop enable bits for the Rx rings.
1061 **/
1062void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
1063{
1064 struct fm10k_hw *hw = &interface->hw;
1065 u8 rx_pause = interface->rx_pause;
1066 int i;
1067
1068#ifdef CONFIG_DCB
1069 if (interface->pfc_en)
1070 rx_pause = interface->pfc_en;
1071
1072#endif
1073 for (i = 0; i < interface->num_rx_queues; i++) {
1074 struct fm10k_ring *ring = interface->rx_ring[i];
1075 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1076 u8 reg_idx = ring->reg_idx;
1077
1078 if (!(rx_pause & BIT(ring->qos_pc)))
1079 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
1080
1081 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
1082 }
1083}
1084
1085/**
1086 * fm10k_configure_dglort - Configure Receive DGLORT after reset
1087 * @interface: board private structure
1088 *
1089 * Configure the DGLORT description and RSS tables.
1090 **/
1091static void fm10k_configure_dglort(struct fm10k_intfc *interface)
1092{
1093 struct fm10k_dglort_cfg dglort = { 0 };
1094 struct fm10k_hw *hw = &interface->hw;
1095 int i;
1096 u32 mrqc;
1097
1098 /* Fill out hash function seeds */
1099 for (i = 0; i < FM10K_RSSRK_SIZE; i++)
1100 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
1101
1102 /* Write RETA table to hardware */
1103 for (i = 0; i < FM10K_RETA_SIZE; i++)
1104 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
1105
1106 /* Generate RSS hash based on packet types, TCP/UDP
1107 * port numbers and/or IPv4/v6 src and dst addresses
1108 */
1109 mrqc = FM10K_MRQC_IPV4 |
1110 FM10K_MRQC_TCP_IPV4 |
1111 FM10K_MRQC_IPV6 |
1112 FM10K_MRQC_TCP_IPV6;
1113
1114 if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP, interface->flags))
1115 mrqc |= FM10K_MRQC_UDP_IPV4;
1116 if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP, interface->flags))
1117 mrqc |= FM10K_MRQC_UDP_IPV6;
1118
1119 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
1120
1121 /* configure default DGLORT mapping for RSS/DCB */
1122 dglort.inner_rss = 1;
1123 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1124 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1125 hw->mac.ops.configure_dglort_map(hw, &dglort);
1126
1127 /* assign GLORT per queue for queue mapped testing */
1128 if (interface->glort_count > 64) {
1129 memset(&dglort, 0, sizeof(dglort));
1130 dglort.inner_rss = 1;
1131 dglort.glort = interface->glort + 64;
1132 dglort.idx = fm10k_dglort_pf_queue;
1133 dglort.queue_l = fls(interface->num_rx_queues - 1);
1134 hw->mac.ops.configure_dglort_map(hw, &dglort);
1135 }
1136
1137 /* assign glort value for RSS/DCB specific to this interface */
1138 memset(&dglort, 0, sizeof(dglort));
1139 dglort.inner_rss = 1;
1140 dglort.glort = interface->glort;
1141 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1142 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1143 /* configure DGLORT mapping for RSS/DCB */
1144 dglort.idx = fm10k_dglort_pf_rss;
1145 if (interface->l2_accel)
1146 dglort.shared_l = fls(interface->l2_accel->size);
1147 hw->mac.ops.configure_dglort_map(hw, &dglort);
1148}
1149
1150/**
1151 * fm10k_configure_rx - Configure Receive Unit after Reset
1152 * @interface: board private structure
1153 *
1154 * Configure the Rx unit of the MAC after a reset.
1155 **/
1156static void fm10k_configure_rx(struct fm10k_intfc *interface)
1157{
1158 int i;
1159
1160 /* Configure SWPRI to PC map */
1161 fm10k_configure_swpri_map(interface);
1162
1163 /* Configure RSS and DGLORT map */
1164 fm10k_configure_dglort(interface);
1165
1166 /* Setup the HW Rx Head and Tail descriptor pointers */
1167 for (i = 0; i < interface->num_rx_queues; i++)
1168 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
1169
1170 /* possible poll here to verify that Rx rings are now enabled */
1171}
1172
1173static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
1174{
1175 struct fm10k_q_vector *q_vector;
1176 int q_idx;
1177
1178 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1179 q_vector = interface->q_vector[q_idx];
1180 napi_enable(&q_vector->napi);
1181 }
1182}
1183
1184static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
1185{
1186 struct fm10k_q_vector *q_vector = data;
1187
1188 if (q_vector->rx.count || q_vector->tx.count)
1189 napi_schedule_irqoff(&q_vector->napi);
1190
1191 return IRQ_HANDLED;
1192}
1193
1194static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
1195{
1196 struct fm10k_intfc *interface = data;
1197 struct fm10k_hw *hw = &interface->hw;
1198 struct fm10k_mbx_info *mbx = &hw->mbx;
1199
1200 /* re-enable mailbox interrupt and indicate 20us delay */
1201 fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
1202 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1203 FM10K_ITR_ENABLE);
1204
1205 /* service upstream mailbox */
1206 if (fm10k_mbx_trylock(interface)) {
1207 mbx->ops.process(hw, mbx);
1208 fm10k_mbx_unlock(interface);
1209 }
1210
1211 hw->mac.get_host_state = true;
1212 fm10k_service_event_schedule(interface);
1213
1214 return IRQ_HANDLED;
1215}
1216
1217#define FM10K_ERR_MSG(type) case (type): error = #type; break
1218static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
1219 struct fm10k_fault *fault)
1220{
1221 struct pci_dev *pdev = interface->pdev;
1222 struct fm10k_hw *hw = &interface->hw;
1223 struct fm10k_iov_data *iov_data = interface->iov_data;
1224 char *error;
1225
1226 switch (type) {
1227 case FM10K_PCA_FAULT:
1228 switch (fault->type) {
1229 default:
1230 error = "Unknown PCA error";
1231 break;
1232 FM10K_ERR_MSG(PCA_NO_FAULT);
1233 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
1234 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
1235 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
1236 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
1237 FM10K_ERR_MSG(PCA_POISONED_TLP);
1238 FM10K_ERR_MSG(PCA_TLP_ABORT);
1239 }
1240 break;
1241 case FM10K_THI_FAULT:
1242 switch (fault->type) {
1243 default:
1244 error = "Unknown THI error";
1245 break;
1246 FM10K_ERR_MSG(THI_NO_FAULT);
1247 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1248 }
1249 break;
1250 case FM10K_FUM_FAULT:
1251 switch (fault->type) {
1252 default:
1253 error = "Unknown FUM error";
1254 break;
1255 FM10K_ERR_MSG(FUM_NO_FAULT);
1256 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
1257 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
1258 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
1259 FM10K_ERR_MSG(FUM_RO_ERROR);
1260 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
1261 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
1262 FM10K_ERR_MSG(FUM_INVALID_TYPE);
1263 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
1264 FM10K_ERR_MSG(FUM_INVALID_BE);
1265 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
1266 }
1267 break;
1268 default:
1269 error = "Undocumented fault";
1270 break;
1271 }
1272
1273 dev_warn(&pdev->dev,
1274 "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
1275 error, fault->address, fault->specinfo,
1276 PCI_SLOT(fault->func), PCI_FUNC(fault->func));
1277
1278 /* For VF faults, clear out the respective LPORT, reset the queue
1279 * resources, and then reconnect to the mailbox. This allows the
1280 * VF in question to resume behavior. For transient faults that are
1281 * the result of non-malicious behavior this will log the fault and
1282 * allow the VF to resume functionality. Obviously for malicious VFs
1283 * they will be able to attempt malicious behavior again. In this
1284 * case, the system administrator will need to step in and manually
1285 * remove or disable the VF in question.
1286 */
1287 if (fault->func && iov_data) {
1288 int vf = fault->func - 1;
1289 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1290
1291 hw->iov.ops.reset_lport(hw, vf_info);
1292 hw->iov.ops.reset_resources(hw, vf_info);
1293
1294 /* reset_lport disables the VF, so re-enable it */
1295 hw->iov.ops.set_lport(hw, vf_info, vf,
1296 FM10K_VF_FLAG_MULTI_CAPABLE);
1297
1298 /* reset_resources will disconnect from the mbx */
1299 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1300 }
1301}
1302
1303static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1304{
1305 struct fm10k_hw *hw = &interface->hw;
1306 struct fm10k_fault fault = { 0 };
1307 int type, err;
1308
1309 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1310 eicr;
1311 eicr >>= 1, type += FM10K_FAULT_SIZE) {
1312 /* only check if there is an error reported */
1313 if (!(eicr & 0x1))
1314 continue;
1315
1316 /* retrieve fault info */
1317 err = hw->mac.ops.get_fault(hw, type, &fault);
1318 if (err) {
1319 dev_err(&interface->pdev->dev,
1320 "error reading fault\n");
1321 continue;
1322 }
1323
1324 fm10k_handle_fault(interface, type, &fault);
1325 }
1326}
1327
1328static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1329{
1330 struct fm10k_hw *hw = &interface->hw;
1331 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1332 u32 maxholdq;
1333 int q;
1334
1335 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1336 return;
1337
1338 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1339 if (maxholdq)
1340 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1341 for (q = 255;;) {
1342 if (maxholdq & BIT(31)) {
1343 if (q < FM10K_MAX_QUEUES_PF) {
1344 interface->rx_overrun_pf++;
1345 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
1346 } else {
1347 interface->rx_overrun_vf++;
1348 }
1349 }
1350
1351 maxholdq *= 2;
1352 if (!maxholdq)
1353 q &= ~(32 - 1);
1354
1355 if (!q)
1356 break;
1357
1358 if (q-- % 32)
1359 continue;
1360
1361 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1362 if (maxholdq)
1363 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1364 }
1365}
1366
1367static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1368{
1369 struct fm10k_intfc *interface = data;
1370 struct fm10k_hw *hw = &interface->hw;
1371 struct fm10k_mbx_info *mbx = &hw->mbx;
1372 u32 eicr;
1373
1374 /* unmask any set bits related to this interrupt */
1375 eicr = fm10k_read_reg(hw, FM10K_EICR);
1376 fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
1377 FM10K_EICR_SWITCHREADY |
1378 FM10K_EICR_SWITCHNOTREADY));
1379
1380 /* report any faults found to the message log */
1381 fm10k_report_fault(interface, eicr);
1382
1383 /* reset any queues disabled due to receiver overrun */
1384 fm10k_reset_drop_on_empty(interface, eicr);
1385
1386 /* service mailboxes */
1387 if (fm10k_mbx_trylock(interface)) {
1388 s32 err = mbx->ops.process(hw, mbx);
1389
1390 if (err == FM10K_ERR_RESET_REQUESTED)
1391 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1392
1393 /* handle VFLRE events */
1394 fm10k_iov_event(interface);
1395 fm10k_mbx_unlock(interface);
1396 }
1397
1398 /* if switch toggled state we should reset GLORTs */
1399 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1400 /* force link down for at least 4 seconds */
1401 interface->link_down_event = jiffies + (4 * HZ);
1402 set_bit(__FM10K_LINK_DOWN, interface->state);
1403
1404 /* reset dglort_map back to no config */
1405 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1406 }
1407
1408 /* we should validate host state after interrupt event */
1409 hw->mac.get_host_state = true;
1410
1411 /* validate host state, and handle VF mailboxes in the service task */
1412 fm10k_service_event_schedule(interface);
1413
1414 /* re-enable mailbox interrupt and indicate 20us delay */
1415 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1416 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1417 FM10K_ITR_ENABLE);
1418
1419 return IRQ_HANDLED;
1420}
1421
1422void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1423{
1424 struct fm10k_hw *hw = &interface->hw;
1425 struct msix_entry *entry;
1426 int itr_reg;
1427
1428 /* no mailbox IRQ to free if MSI-X is not enabled */
1429 if (!interface->msix_entries)
1430 return;
1431
1432 entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1433
1434 /* disconnect the mailbox */
1435 hw->mbx.ops.disconnect(hw, &hw->mbx);
1436
1437 /* disable Mailbox cause */
1438 if (hw->mac.type == fm10k_mac_pf) {
1439 fm10k_write_reg(hw, FM10K_EIMR,
1440 FM10K_EIMR_DISABLE(PCA_FAULT) |
1441 FM10K_EIMR_DISABLE(FUM_FAULT) |
1442 FM10K_EIMR_DISABLE(MAILBOX) |
1443 FM10K_EIMR_DISABLE(SWITCHREADY) |
1444 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1445 FM10K_EIMR_DISABLE(SRAMERROR) |
1446 FM10K_EIMR_DISABLE(VFLR) |
1447 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1448 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1449 } else {
1450 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1451 }
1452
1453 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1454
1455 free_irq(entry->vector, interface);
1456}
1457
1458static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1459 struct fm10k_mbx_info *mbx)
1460{
1461 bool vlan_override = hw->mac.vlan_override;
1462 u16 default_vid = hw->mac.default_vid;
1463 struct fm10k_intfc *interface;
1464 s32 err;
1465
1466 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1467 if (err)
1468 return err;
1469
1470 interface = container_of(hw, struct fm10k_intfc, hw);
1471
1472 /* MAC was changed so we need reset */
1473 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1474 !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1475 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1476
1477 /* VLAN override was changed, or default VLAN changed */
1478 if ((vlan_override != hw->mac.vlan_override) ||
1479 (default_vid != hw->mac.default_vid))
1480 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1481
1482 return 0;
1483}
1484
1485/* generic error handler for mailbox issues */
1486static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1487 struct fm10k_mbx_info __always_unused *mbx)
1488{
1489 struct fm10k_intfc *interface;
1490 struct pci_dev *pdev;
1491
1492 interface = container_of(hw, struct fm10k_intfc, hw);
1493 pdev = interface->pdev;
1494
1495 dev_err(&pdev->dev, "Unknown message ID %u\n",
1496 **results & FM10K_TLV_ID_MASK);
1497
1498 return 0;
1499}
1500
1501static const struct fm10k_msg_data vf_mbx_data[] = {
1502 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1503 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1504 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1505 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1506};
1507
1508static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1509{
1510 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1511 struct net_device *dev = interface->netdev;
1512 struct fm10k_hw *hw = &interface->hw;
1513 int err;
1514
1515 /* Use timer0 for interrupt moderation on the mailbox */
1516 u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1517
1518 /* register mailbox handlers */
1519 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1520 if (err)
1521 return err;
1522
1523 /* request the IRQ */
1524 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1525 dev->name, interface);
1526 if (err) {
1527 netif_err(interface, probe, dev,
1528 "request_irq for msix_mbx failed: %d\n", err);
1529 return err;
1530 }
1531
1532 /* map all of the interrupt sources */
1533 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1534
1535 /* enable interrupt */
1536 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1537
1538 return 0;
1539}
1540
1541static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1542 struct fm10k_mbx_info *mbx)
1543{
1544 struct fm10k_intfc *interface;
1545 u32 dglort_map = hw->mac.dglort_map;
1546 s32 err;
1547
1548 interface = container_of(hw, struct fm10k_intfc, hw);
1549
1550 err = fm10k_msg_err_pf(hw, results, mbx);
1551 if (!err && hw->swapi.status) {
1552 /* force link down for a reasonable delay */
1553 interface->link_down_event = jiffies + (2 * HZ);
1554 set_bit(__FM10K_LINK_DOWN, interface->state);
1555
1556 /* reset dglort_map back to no config */
1557 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1558
1559 fm10k_service_event_schedule(interface);
1560
1561 /* prevent overloading kernel message buffer */
1562 if (interface->lport_map_failed)
1563 return 0;
1564
1565 interface->lport_map_failed = true;
1566
1567 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1568 dev_warn(&interface->pdev->dev,
1569 "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1570 dev_warn(&interface->pdev->dev,
1571 "request logical port map failed: %d\n",
1572 hw->swapi.status);
1573
1574 return 0;
1575 }
1576
1577 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1578 if (err)
1579 return err;
1580
1581 interface->lport_map_failed = false;
1582
1583 /* we need to reset if port count was just updated */
1584 if (dglort_map != hw->mac.dglort_map)
1585 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1586
1587 return 0;
1588}
1589
1590static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1591 struct fm10k_mbx_info __always_unused *mbx)
1592{
1593 struct fm10k_intfc *interface;
1594 u16 glort, pvid;
1595 u32 pvid_update;
1596 s32 err;
1597
1598 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1599 &pvid_update);
1600 if (err)
1601 return err;
1602
1603 /* extract values from the pvid update */
1604 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1605 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1606
1607 /* if glort is not valid return error */
1608 if (!fm10k_glort_valid_pf(hw, glort))
1609 return FM10K_ERR_PARAM;
1610
1611 /* verify VLAN ID is valid */
1612 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1613 return FM10K_ERR_PARAM;
1614
1615 interface = container_of(hw, struct fm10k_intfc, hw);
1616
1617 /* check to see if this belongs to one of the VFs */
1618 err = fm10k_iov_update_pvid(interface, glort, pvid);
1619 if (!err)
1620 return 0;
1621
1622 /* we need to reset if default VLAN was just updated */
1623 if (pvid != hw->mac.default_vid)
1624 set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
1625
1626 hw->mac.default_vid = pvid;
1627
1628 return 0;
1629}
1630
1631static const struct fm10k_msg_data pf_mbx_data[] = {
1632 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1633 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1634 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1635 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1636 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1637 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1638 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1639};
1640
1641static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1642{
1643 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1644 struct net_device *dev = interface->netdev;
1645 struct fm10k_hw *hw = &interface->hw;
1646 int err;
1647
1648 /* Use timer0 for interrupt moderation on the mailbox */
1649 u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1650 u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1651
1652 /* register mailbox handlers */
1653 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1654 if (err)
1655 return err;
1656
1657 /* request the IRQ */
1658 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1659 dev->name, interface);
1660 if (err) {
1661 netif_err(interface, probe, dev,
1662 "request_irq for msix_mbx failed: %d\n", err);
1663 return err;
1664 }
1665
1666 /* Enable interrupts w/ no moderation for "other" interrupts */
1667 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1668 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1669 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1670 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1671 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1672
1673 /* Enable interrupts w/ moderation for mailbox */
1674 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1675
1676 /* Enable individual interrupt causes */
1677 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1678 FM10K_EIMR_ENABLE(FUM_FAULT) |
1679 FM10K_EIMR_ENABLE(MAILBOX) |
1680 FM10K_EIMR_ENABLE(SWITCHREADY) |
1681 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1682 FM10K_EIMR_ENABLE(SRAMERROR) |
1683 FM10K_EIMR_ENABLE(VFLR) |
1684 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1685
1686 /* enable interrupt */
1687 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1688
1689 return 0;
1690}
1691
1692int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1693{
1694 struct fm10k_hw *hw = &interface->hw;
1695 int err;
1696
1697 /* enable Mailbox cause */
1698 if (hw->mac.type == fm10k_mac_pf)
1699 err = fm10k_mbx_request_irq_pf(interface);
1700 else
1701 err = fm10k_mbx_request_irq_vf(interface);
1702 if (err)
1703 return err;
1704
1705 /* connect mailbox */
1706 err = hw->mbx.ops.connect(hw, &hw->mbx);
1707
1708 /* if the mailbox failed to connect, then free IRQ */
1709 if (err)
1710 fm10k_mbx_free_irq(interface);
1711
1712 return err;
1713}
1714
1715/**
1716 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1717 * @interface: board private structure
1718 *
1719 * Release all interrupts associated with this interface
1720 **/
1721void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1722{
1723 int vector = interface->num_q_vectors;
1724 struct msix_entry *entry;
1725
1726 entry = &interface->msix_entries[NON_Q_VECTORS + vector];
1727
1728 while (vector) {
1729 struct fm10k_q_vector *q_vector;
1730
1731 vector--;
1732 entry--;
1733 q_vector = interface->q_vector[vector];
1734
1735 if (!q_vector->tx.count && !q_vector->rx.count)
1736 continue;
1737
1738 /* clear the affinity_mask in the IRQ descriptor */
1739 irq_set_affinity_hint(entry->vector, NULL);
1740
1741 /* disable interrupts */
1742 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1743
1744 free_irq(entry->vector, q_vector);
1745 }
1746}
1747
1748/**
1749 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1750 * @interface: board private structure
1751 *
1752 * Attempts to configure interrupts using the best available
1753 * capabilities of the hardware and kernel.
1754 **/
1755int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1756{
1757 struct net_device *dev = interface->netdev;
1758 struct fm10k_hw *hw = &interface->hw;
1759 struct msix_entry *entry;
1760 unsigned int ri = 0, ti = 0;
1761 int vector, err;
1762
1763 entry = &interface->msix_entries[NON_Q_VECTORS];
1764
1765 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1766 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1767
1768 /* name the vector */
1769 if (q_vector->tx.count && q_vector->rx.count) {
1770 snprintf(q_vector->name, sizeof(q_vector->name),
1771 "%s-TxRx-%u", dev->name, ri++);
1772 ti++;
1773 } else if (q_vector->rx.count) {
1774 snprintf(q_vector->name, sizeof(q_vector->name),
1775 "%s-rx-%u", dev->name, ri++);
1776 } else if (q_vector->tx.count) {
1777 snprintf(q_vector->name, sizeof(q_vector->name),
1778 "%s-tx-%u", dev->name, ti++);
1779 } else {
1780 /* skip this unused q_vector */
1781 continue;
1782 }
1783
1784 /* Assign ITR register to q_vector */
1785 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1786 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1787 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1788
1789 /* request the IRQ */
1790 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1791 q_vector->name, q_vector);
1792 if (err) {
1793 netif_err(interface, probe, dev,
1794 "request_irq failed for MSIX interrupt Error: %d\n",
1795 err);
1796 goto err_out;
1797 }
1798
1799 /* assign the mask for this irq */
1800 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1801
1802 /* Enable q_vector */
1803 writel(FM10K_ITR_ENABLE, q_vector->itr);
1804
1805 entry++;
1806 }
1807
1808 return 0;
1809
1810err_out:
1811 /* wind through the ring freeing all entries and vectors */
1812 while (vector) {
1813 struct fm10k_q_vector *q_vector;
1814
1815 entry--;
1816 vector--;
1817 q_vector = interface->q_vector[vector];
1818
1819 if (!q_vector->tx.count && !q_vector->rx.count)
1820 continue;
1821
1822 /* clear the affinity_mask in the IRQ descriptor */
1823 irq_set_affinity_hint(entry->vector, NULL);
1824
1825 /* disable interrupts */
1826 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1827
1828 free_irq(entry->vector, q_vector);
1829 }
1830
1831 return err;
1832}
1833
1834void fm10k_up(struct fm10k_intfc *interface)
1835{
1836 struct fm10k_hw *hw = &interface->hw;
1837
1838 /* Enable Tx/Rx DMA */
1839 hw->mac.ops.start_hw(hw);
1840
1841 /* configure Tx descriptor rings */
1842 fm10k_configure_tx(interface);
1843
1844 /* configure Rx descriptor rings */
1845 fm10k_configure_rx(interface);
1846
1847 /* configure interrupts */
1848 hw->mac.ops.update_int_moderator(hw);
1849
1850 /* enable statistics capture again */
1851 clear_bit(__FM10K_UPDATING_STATS, interface->state);
1852
1853 /* clear down bit to indicate we are ready to go */
1854 clear_bit(__FM10K_DOWN, interface->state);
1855
1856 /* enable polling cleanups */
1857 fm10k_napi_enable_all(interface);
1858
1859 /* re-establish Rx filters */
1860 fm10k_restore_rx_state(interface);
1861
1862 /* enable transmits */
1863 netif_tx_start_all_queues(interface->netdev);
1864
1865 /* kick off the service timer now */
1866 hw->mac.get_host_state = true;
1867 mod_timer(&interface->service_timer, jiffies);
1868}
1869
1870static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1871{
1872 struct fm10k_q_vector *q_vector;
1873 int q_idx;
1874
1875 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1876 q_vector = interface->q_vector[q_idx];
1877 napi_disable(&q_vector->napi);
1878 }
1879}
1880
1881void fm10k_down(struct fm10k_intfc *interface)
1882{
1883 struct net_device *netdev = interface->netdev;
1884 struct fm10k_hw *hw = &interface->hw;
1885 int err, i = 0, count = 0;
1886
1887 /* signal that we are down to the interrupt handler and service task */
1888 if (test_and_set_bit(__FM10K_DOWN, interface->state))
1889 return;
1890
1891 /* call carrier off first to avoid false dev_watchdog timeouts */
1892 netif_carrier_off(netdev);
1893
1894 /* disable transmits */
1895 netif_tx_stop_all_queues(netdev);
1896 netif_tx_disable(netdev);
1897
1898 /* reset Rx filters */
1899 fm10k_reset_rx_state(interface);
1900
1901 /* disable polling routines */
1902 fm10k_napi_disable_all(interface);
1903
1904 /* capture stats one last time before stopping interface */
1905 fm10k_update_stats(interface);
1906
1907 /* prevent updating statistics while we're down */
1908 while (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
1909 usleep_range(1000, 2000);
1910
1911 /* skip waiting for TX DMA if we lost PCIe link */
1912 if (FM10K_REMOVED(hw->hw_addr))
1913 goto skip_tx_dma_drain;
1914
1915 /* In some rare circumstances it can take a while for Tx queues to
1916 * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1917 * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1918 * until the Tx queues have emptied, or until a number of retries. If
1919 * we fail to clear within the retry loop, we will issue a warning
1920 * indicating that Tx DMA is probably hung. Note this means we call
1921 * .stop_hw() twice but this shouldn't cause any problems.
1922 */
1923 err = hw->mac.ops.stop_hw(hw);
1924 if (err != FM10K_ERR_REQUESTS_PENDING)
1925 goto skip_tx_dma_drain;
1926
1927#define TX_DMA_DRAIN_RETRIES 25
1928 for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1929 usleep_range(10000, 20000);
1930
1931 /* start checking at the last ring to have pending Tx */
1932 for (; i < interface->num_tx_queues; i++)
1933 if (fm10k_get_tx_pending(interface->tx_ring[i], false))
1934 break;
1935
1936 /* if all the queues are drained, we can break now */
1937 if (i == interface->num_tx_queues)
1938 break;
1939 }
1940
1941 if (count >= TX_DMA_DRAIN_RETRIES)
1942 dev_err(&interface->pdev->dev,
1943 "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1944 count);
1945skip_tx_dma_drain:
1946 /* Disable DMA engine for Tx/Rx */
1947 err = hw->mac.ops.stop_hw(hw);
1948 if (err == FM10K_ERR_REQUESTS_PENDING)
1949 dev_err(&interface->pdev->dev,
1950 "due to pending requests hw was not shut down gracefully\n");
1951 else if (err)
1952 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1953
1954 /* free any buffers still on the rings */
1955 fm10k_clean_all_tx_rings(interface);
1956 fm10k_clean_all_rx_rings(interface);
1957}
1958
1959/**
1960 * fm10k_sw_init - Initialize general software structures
1961 * @interface: host interface private structure to initialize
1962 * @ent: PCI device ID entry
1963 *
1964 * fm10k_sw_init initializes the interface private data structure.
1965 * Fields are initialized based on PCI device information and
1966 * OS network device settings (MTU size).
1967 **/
1968static int fm10k_sw_init(struct fm10k_intfc *interface,
1969 const struct pci_device_id *ent)
1970{
1971 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1972 struct fm10k_hw *hw = &interface->hw;
1973 struct pci_dev *pdev = interface->pdev;
1974 struct net_device *netdev = interface->netdev;
1975 u32 rss_key[FM10K_RSSRK_SIZE];
1976 unsigned int rss;
1977 int err;
1978
1979 /* initialize back pointer */
1980 hw->back = interface;
1981 hw->hw_addr = interface->uc_addr;
1982
1983 /* PCI config space info */
1984 hw->vendor_id = pdev->vendor;
1985 hw->device_id = pdev->device;
1986 hw->revision_id = pdev->revision;
1987 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1988 hw->subsystem_device_id = pdev->subsystem_device;
1989
1990 /* Setup hw api */
1991 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1992 hw->mac.type = fi->mac;
1993
1994 /* Setup IOV handlers */
1995 if (fi->iov_ops)
1996 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1997
1998 /* Set common capability flags and settings */
1999 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
2000 interface->ring_feature[RING_F_RSS].limit = rss;
2001 fi->get_invariants(hw);
2002
2003 /* pick up the PCIe bus settings for reporting later */
2004 if (hw->mac.ops.get_bus_info)
2005 hw->mac.ops.get_bus_info(hw);
2006
2007 /* limit the usable DMA range */
2008 if (hw->mac.ops.set_dma_mask)
2009 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
2010
2011 /* update netdev with DMA restrictions */
2012 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
2013 netdev->features |= NETIF_F_HIGHDMA;
2014 netdev->vlan_features |= NETIF_F_HIGHDMA;
2015 }
2016
2017 /* reset and initialize the hardware so it is in a known state */
2018 err = hw->mac.ops.reset_hw(hw);
2019 if (err) {
2020 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
2021 return err;
2022 }
2023
2024 err = hw->mac.ops.init_hw(hw);
2025 if (err) {
2026 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
2027 return err;
2028 }
2029
2030 /* initialize hardware statistics */
2031 hw->mac.ops.update_hw_stats(hw, &interface->stats);
2032
2033 /* Set upper limit on IOV VFs that can be allocated */
2034 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
2035
2036 /* Start with random Ethernet address */
2037 eth_random_addr(hw->mac.addr);
2038
2039 /* Initialize MAC address from hardware */
2040 err = hw->mac.ops.read_mac_addr(hw);
2041 if (err) {
2042 dev_warn(&pdev->dev,
2043 "Failed to obtain MAC address defaulting to random\n");
2044 /* tag address assignment as random */
2045 netdev->addr_assign_type |= NET_ADDR_RANDOM;
2046 }
2047
2048 eth_hw_addr_set(netdev, hw->mac.addr);
2049 ether_addr_copy(netdev->perm_addr, hw->mac.addr);
2050
2051 if (!is_valid_ether_addr(netdev->perm_addr)) {
2052 dev_err(&pdev->dev, "Invalid MAC Address\n");
2053 return -EIO;
2054 }
2055
2056 /* initialize DCBNL interface */
2057 fm10k_dcbnl_set_ops(netdev);
2058
2059 /* set default ring sizes */
2060 interface->tx_ring_count = FM10K_DEFAULT_TXD;
2061 interface->rx_ring_count = FM10K_DEFAULT_RXD;
2062
2063 /* set default interrupt moderation */
2064 interface->tx_itr = FM10K_TX_ITR_DEFAULT;
2065 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
2066
2067 /* Initialize the MAC/VLAN queue */
2068 INIT_LIST_HEAD(&interface->macvlan_requests);
2069
2070 netdev_rss_key_fill(rss_key, sizeof(rss_key));
2071 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
2072
2073 /* Initialize the mailbox lock */
2074 spin_lock_init(&interface->mbx_lock);
2075 spin_lock_init(&interface->macvlan_lock);
2076
2077 /* Start off interface as being down */
2078 set_bit(__FM10K_DOWN, interface->state);
2079 set_bit(__FM10K_UPDATING_STATS, interface->state);
2080
2081 return 0;
2082}
2083
2084/**
2085 * fm10k_probe - Device Initialization Routine
2086 * @pdev: PCI device information struct
2087 * @ent: entry in fm10k_pci_tbl
2088 *
2089 * Returns 0 on success, negative on failure
2090 *
2091 * fm10k_probe initializes an interface identified by a pci_dev structure.
2092 * The OS initialization, configuring of the interface private structure,
2093 * and a hardware reset occur.
2094 **/
2095static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2096{
2097 struct net_device *netdev;
2098 struct fm10k_intfc *interface;
2099 int err;
2100
2101 if (pdev->error_state != pci_channel_io_normal) {
2102 dev_err(&pdev->dev,
2103 "PCI device still in an error state. Unable to load...\n");
2104 return -EIO;
2105 }
2106
2107 err = pci_enable_device_mem(pdev);
2108 if (err) {
2109 dev_err(&pdev->dev,
2110 "PCI enable device failed: %d\n", err);
2111 return err;
2112 }
2113
2114 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
2115 if (err)
2116 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2117 if (err) {
2118 dev_err(&pdev->dev,
2119 "DMA configuration failed: %d\n", err);
2120 goto err_dma;
2121 }
2122
2123 err = pci_request_mem_regions(pdev, fm10k_driver_name);
2124 if (err) {
2125 dev_err(&pdev->dev,
2126 "pci_request_selected_regions failed: %d\n", err);
2127 goto err_pci_reg;
2128 }
2129
2130 pci_enable_pcie_error_reporting(pdev);
2131
2132 pci_set_master(pdev);
2133 pci_save_state(pdev);
2134
2135 netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
2136 if (!netdev) {
2137 err = -ENOMEM;
2138 goto err_alloc_netdev;
2139 }
2140
2141 SET_NETDEV_DEV(netdev, &pdev->dev);
2142
2143 interface = netdev_priv(netdev);
2144 pci_set_drvdata(pdev, interface);
2145
2146 interface->netdev = netdev;
2147 interface->pdev = pdev;
2148
2149 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
2150 FM10K_UC_ADDR_SIZE);
2151 if (!interface->uc_addr) {
2152 err = -EIO;
2153 goto err_ioremap;
2154 }
2155
2156 err = fm10k_sw_init(interface, ent);
2157 if (err)
2158 goto err_sw_init;
2159
2160 /* enable debugfs support */
2161 fm10k_dbg_intfc_init(interface);
2162
2163 err = fm10k_init_queueing_scheme(interface);
2164 if (err)
2165 goto err_sw_init;
2166
2167 /* the mbx interrupt might attempt to schedule the service task, so we
2168 * must ensure it is disabled since we haven't yet requested the timer
2169 * or work item.
2170 */
2171 set_bit(__FM10K_SERVICE_DISABLE, interface->state);
2172
2173 err = fm10k_mbx_request_irq(interface);
2174 if (err)
2175 goto err_mbx_interrupt;
2176
2177 /* final check of hardware state before registering the interface */
2178 err = fm10k_hw_ready(interface);
2179 if (err)
2180 goto err_register;
2181
2182 err = register_netdev(netdev);
2183 if (err)
2184 goto err_register;
2185
2186 /* carrier off reporting is important to ethtool even BEFORE open */
2187 netif_carrier_off(netdev);
2188
2189 /* stop all the transmit queues from transmitting until link is up */
2190 netif_tx_stop_all_queues(netdev);
2191
2192 /* Initialize service timer and service task late in order to avoid
2193 * cleanup issues.
2194 */
2195 timer_setup(&interface->service_timer, fm10k_service_timer, 0);
2196 INIT_WORK(&interface->service_task, fm10k_service_task);
2197
2198 /* Setup the MAC/VLAN queue */
2199 INIT_DELAYED_WORK(&interface->macvlan_task, fm10k_macvlan_task);
2200
2201 /* kick off service timer now, even when interface is down */
2202 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2203
2204 /* print warning for non-optimal configurations */
2205 pcie_print_link_status(interface->pdev);
2206
2207 /* report MAC address for logging */
2208 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2209
2210 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2211 fm10k_iov_configure(pdev, 0);
2212
2213 /* clear the service task disable bit and kick off service task */
2214 clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
2215 fm10k_service_event_schedule(interface);
2216
2217 return 0;
2218
2219err_register:
2220 fm10k_mbx_free_irq(interface);
2221err_mbx_interrupt:
2222 fm10k_clear_queueing_scheme(interface);
2223err_sw_init:
2224 if (interface->sw_addr)
2225 iounmap(interface->sw_addr);
2226 iounmap(interface->uc_addr);
2227err_ioremap:
2228 free_netdev(netdev);
2229err_alloc_netdev:
2230 pci_disable_pcie_error_reporting(pdev);
2231 pci_release_mem_regions(pdev);
2232err_pci_reg:
2233err_dma:
2234 pci_disable_device(pdev);
2235 return err;
2236}
2237
2238/**
2239 * fm10k_remove - Device Removal Routine
2240 * @pdev: PCI device information struct
2241 *
2242 * fm10k_remove is called by the PCI subsystem to alert the driver
2243 * that it should release a PCI device. The could be caused by a
2244 * Hot-Plug event, or because the driver is going to be removed from
2245 * memory.
2246 **/
2247static void fm10k_remove(struct pci_dev *pdev)
2248{
2249 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2250 struct net_device *netdev = interface->netdev;
2251
2252 del_timer_sync(&interface->service_timer);
2253
2254 fm10k_stop_service_event(interface);
2255 fm10k_stop_macvlan_task(interface);
2256
2257 /* Remove all pending MAC/VLAN requests */
2258 fm10k_clear_macvlan_queue(interface, interface->glort, true);
2259
2260 /* free netdev, this may bounce the interrupts due to setup_tc */
2261 if (netdev->reg_state == NETREG_REGISTERED)
2262 unregister_netdev(netdev);
2263
2264 /* release VFs */
2265 fm10k_iov_disable(pdev);
2266
2267 /* disable mailbox interrupt */
2268 fm10k_mbx_free_irq(interface);
2269
2270 /* free interrupts */
2271 fm10k_clear_queueing_scheme(interface);
2272
2273 /* remove any debugfs interfaces */
2274 fm10k_dbg_intfc_exit(interface);
2275
2276 if (interface->sw_addr)
2277 iounmap(interface->sw_addr);
2278 iounmap(interface->uc_addr);
2279
2280 free_netdev(netdev);
2281
2282 pci_release_mem_regions(pdev);
2283
2284 pci_disable_pcie_error_reporting(pdev);
2285
2286 pci_disable_device(pdev);
2287}
2288
2289static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2290{
2291 /* the watchdog task reads from registers, which might appear like
2292 * a surprise remove if the PCIe device is disabled while we're
2293 * stopped. We stop the watchdog task until after we resume software
2294 * activity.
2295 *
2296 * Note that the MAC/VLAN task will be stopped as part of preparing
2297 * for reset so we don't need to handle it here.
2298 */
2299 fm10k_stop_service_event(interface);
2300
2301 if (fm10k_prepare_for_reset(interface))
2302 set_bit(__FM10K_RESET_SUSPENDED, interface->state);
2303}
2304
2305static int fm10k_handle_resume(struct fm10k_intfc *interface)
2306{
2307 struct fm10k_hw *hw = &interface->hw;
2308 int err;
2309
2310 /* Even if we didn't properly prepare for reset in
2311 * fm10k_prepare_suspend, we'll attempt to resume anyways.
2312 */
2313 if (!test_and_clear_bit(__FM10K_RESET_SUSPENDED, interface->state))
2314 dev_warn(&interface->pdev->dev,
2315 "Device was shut down as part of suspend... Attempting to recover\n");
2316
2317 /* reset statistics starting values */
2318 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2319
2320 err = fm10k_handle_reset(interface);
2321 if (err)
2322 return err;
2323
2324 /* assume host is not ready, to prevent race with watchdog in case we
2325 * actually don't have connection to the switch
2326 */
2327 interface->host_ready = false;
2328 fm10k_watchdog_host_not_ready(interface);
2329
2330 /* force link to stay down for a second to prevent link flutter */
2331 interface->link_down_event = jiffies + (HZ);
2332 set_bit(__FM10K_LINK_DOWN, interface->state);
2333
2334 /* restart the service task */
2335 fm10k_start_service_event(interface);
2336
2337 /* Restart the MAC/VLAN request queue in-case of outstanding events */
2338 fm10k_macvlan_schedule(interface);
2339
2340 return 0;
2341}
2342
2343/**
2344 * fm10k_resume - Generic PM resume hook
2345 * @dev: generic device structure
2346 *
2347 * Generic PM hook used when waking the device from a low power state after
2348 * suspend or hibernation. This function does not need to handle lower PCIe
2349 * device state as the stack takes care of that for us.
2350 **/
2351static int __maybe_unused fm10k_resume(struct device *dev)
2352{
2353 struct fm10k_intfc *interface = dev_get_drvdata(dev);
2354 struct net_device *netdev = interface->netdev;
2355 struct fm10k_hw *hw = &interface->hw;
2356 int err;
2357
2358 /* refresh hw_addr in case it was dropped */
2359 hw->hw_addr = interface->uc_addr;
2360
2361 err = fm10k_handle_resume(interface);
2362 if (err)
2363 return err;
2364
2365 netif_device_attach(netdev);
2366
2367 return 0;
2368}
2369
2370/**
2371 * fm10k_suspend - Generic PM suspend hook
2372 * @dev: generic device structure
2373 *
2374 * Generic PM hook used when setting the device into a low power state for
2375 * system suspend or hibernation. This function does not need to handle lower
2376 * PCIe device state as the stack takes care of that for us.
2377 **/
2378static int __maybe_unused fm10k_suspend(struct device *dev)
2379{
2380 struct fm10k_intfc *interface = dev_get_drvdata(dev);
2381 struct net_device *netdev = interface->netdev;
2382
2383 netif_device_detach(netdev);
2384
2385 fm10k_prepare_suspend(interface);
2386
2387 return 0;
2388}
2389
2390/**
2391 * fm10k_io_error_detected - called when PCI error is detected
2392 * @pdev: Pointer to PCI device
2393 * @state: The current pci connection state
2394 *
2395 * This function is called after a PCI bus error affecting
2396 * this device has been detected.
2397 */
2398static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2399 pci_channel_state_t state)
2400{
2401 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2402 struct net_device *netdev = interface->netdev;
2403
2404 netif_device_detach(netdev);
2405
2406 if (state == pci_channel_io_perm_failure)
2407 return PCI_ERS_RESULT_DISCONNECT;
2408
2409 fm10k_prepare_suspend(interface);
2410
2411 /* Request a slot reset. */
2412 return PCI_ERS_RESULT_NEED_RESET;
2413}
2414
2415/**
2416 * fm10k_io_slot_reset - called after the pci bus has been reset.
2417 * @pdev: Pointer to PCI device
2418 *
2419 * Restart the card from scratch, as if from a cold-boot.
2420 */
2421static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2422{
2423 pci_ers_result_t result;
2424
2425 if (pci_reenable_device(pdev)) {
2426 dev_err(&pdev->dev,
2427 "Cannot re-enable PCI device after reset.\n");
2428 result = PCI_ERS_RESULT_DISCONNECT;
2429 } else {
2430 pci_set_master(pdev);
2431 pci_restore_state(pdev);
2432
2433 /* After second error pci->state_saved is false, this
2434 * resets it so EEH doesn't break.
2435 */
2436 pci_save_state(pdev);
2437
2438 pci_wake_from_d3(pdev, false);
2439
2440 result = PCI_ERS_RESULT_RECOVERED;
2441 }
2442
2443 return result;
2444}
2445
2446/**
2447 * fm10k_io_resume - called when traffic can start flowing again.
2448 * @pdev: Pointer to PCI device
2449 *
2450 * This callback is called when the error recovery driver tells us that
2451 * its OK to resume normal operation.
2452 */
2453static void fm10k_io_resume(struct pci_dev *pdev)
2454{
2455 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2456 struct net_device *netdev = interface->netdev;
2457 int err;
2458
2459 err = fm10k_handle_resume(interface);
2460
2461 if (err)
2462 dev_warn(&pdev->dev,
2463 "%s failed: %d\n", __func__, err);
2464 else
2465 netif_device_attach(netdev);
2466}
2467
2468/**
2469 * fm10k_io_reset_prepare - called when PCI function is about to be reset
2470 * @pdev: Pointer to PCI device
2471 *
2472 * This callback is called when the PCI function is about to be reset,
2473 * allowing the device driver to prepare for it.
2474 */
2475static void fm10k_io_reset_prepare(struct pci_dev *pdev)
2476{
2477 /* warn incase we have any active VF devices */
2478 if (pci_num_vf(pdev))
2479 dev_warn(&pdev->dev,
2480 "PCIe FLR may cause issues for any active VF devices\n");
2481 fm10k_prepare_suspend(pci_get_drvdata(pdev));
2482}
2483
2484/**
2485 * fm10k_io_reset_done - called when PCI function has finished resetting
2486 * @pdev: Pointer to PCI device
2487 *
2488 * This callback is called just after the PCI function is reset, such as via
2489 * /sys/class/net/<enpX>/device/reset or similar.
2490 */
2491static void fm10k_io_reset_done(struct pci_dev *pdev)
2492{
2493 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2494 int err = fm10k_handle_resume(interface);
2495
2496 if (err) {
2497 dev_warn(&pdev->dev,
2498 "%s failed: %d\n", __func__, err);
2499 netif_device_detach(interface->netdev);
2500 }
2501}
2502
2503static const struct pci_error_handlers fm10k_err_handler = {
2504 .error_detected = fm10k_io_error_detected,
2505 .slot_reset = fm10k_io_slot_reset,
2506 .resume = fm10k_io_resume,
2507 .reset_prepare = fm10k_io_reset_prepare,
2508 .reset_done = fm10k_io_reset_done,
2509};
2510
2511static SIMPLE_DEV_PM_OPS(fm10k_pm_ops, fm10k_suspend, fm10k_resume);
2512
2513static struct pci_driver fm10k_driver = {
2514 .name = fm10k_driver_name,
2515 .id_table = fm10k_pci_tbl,
2516 .probe = fm10k_probe,
2517 .remove = fm10k_remove,
2518 .driver = {
2519 .pm = &fm10k_pm_ops,
2520 },
2521 .sriov_configure = fm10k_iov_configure,
2522 .err_handler = &fm10k_err_handler
2523};
2524
2525/**
2526 * fm10k_register_pci_driver - register driver interface
2527 *
2528 * This function is called on module load in order to register the driver.
2529 **/
2530int fm10k_register_pci_driver(void)
2531{
2532 return pci_register_driver(&fm10k_driver);
2533}
2534
2535/**
2536 * fm10k_unregister_pci_driver - unregister driver interface
2537 *
2538 * This function is called on module unload in order to remove the driver.
2539 **/
2540void fm10k_unregister_pci_driver(void)
2541{
2542 pci_unregister_driver(&fm10k_driver);
2543}
1/* Intel(R) Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2016 Intel Corporation.
3 *
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.
7 *
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
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
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
19 */
20
21#include <linux/module.h>
22#include <linux/aer.h>
23
24#include "fm10k.h"
25
26static const struct fm10k_info *fm10k_info_tbl[] = {
27 [fm10k_device_pf] = &fm10k_pf_info,
28 [fm10k_device_vf] = &fm10k_vf_info,
29};
30
31/**
32 * fm10k_pci_tbl - PCI Device ID Table
33 *
34 * Wildcard entries (PCI_ANY_ID) should come last
35 * Last entry must be all 0s
36 *
37 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
38 * Class, Class Mask, private data (not used) }
39 */
40static 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 */
44 { 0, }
45};
46MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
47
48u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
49{
50 struct fm10k_intfc *interface = hw->back;
51 u16 value = 0;
52
53 if (FM10K_REMOVED(hw->hw_addr))
54 return ~value;
55
56 pci_read_config_word(interface->pdev, reg, &value);
57 if (value == 0xFFFF)
58 fm10k_write_flush(hw);
59
60 return value;
61}
62
63u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
64{
65 u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
66 u32 value = 0;
67
68 if (FM10K_REMOVED(hw_addr))
69 return ~value;
70
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;
75
76 hw->hw_addr = NULL;
77 netif_device_detach(netdev);
78 netdev_err(netdev, "PCIe link lost, device now detached\n");
79 }
80
81 return value;
82}
83
84static int fm10k_hw_ready(struct fm10k_intfc *interface)
85{
86 struct fm10k_hw *hw = &interface->hw;
87
88 fm10k_write_flush(hw);
89
90 return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
91}
92
93void fm10k_service_event_schedule(struct fm10k_intfc *interface)
94{
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);
98}
99
100static void fm10k_service_event_complete(struct fm10k_intfc *interface)
101{
102 WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, &interface->state));
103
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);
107}
108
109/**
110 * fm10k_service_timer - Timer Call-back
111 * @data: pointer to interface cast into an unsigned long
112 **/
113static void fm10k_service_timer(unsigned long data)
114{
115 struct fm10k_intfc *interface = (struct fm10k_intfc *)data;
116
117 /* Reset the timer */
118 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
119
120 fm10k_service_event_schedule(interface);
121}
122
123static void fm10k_detach_subtask(struct fm10k_intfc *interface)
124{
125 struct net_device *netdev = interface->netdev;
126 u32 __iomem *hw_addr;
127 u32 value;
128
129 /* do nothing if device is still present or hw_addr is set */
130 if (netif_device_present(netdev) || interface->hw.hw_addr)
131 return;
132
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);
136 if (~value) {
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");
141 return;
142 }
143
144 rtnl_lock();
145
146 if (netif_running(netdev))
147 dev_close(netdev);
148
149 rtnl_unlock();
150}
151
152static void fm10k_prepare_for_reset(struct fm10k_intfc *interface)
153{
154 struct net_device *netdev = interface->netdev;
155
156 WARN_ON(in_interrupt());
157
158 /* put off any impending NetWatchDogTimeout */
159 netif_trans_update(netdev);
160
161 while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
162 usleep_range(1000, 2000);
163
164 rtnl_lock();
165
166 fm10k_iov_suspend(interface->pdev);
167
168 if (netif_running(netdev))
169 fm10k_close(netdev);
170
171 fm10k_mbx_free_irq(interface);
172
173 /* free interrupts */
174 fm10k_clear_queueing_scheme(interface);
175
176 /* delay any future reset requests */
177 interface->last_reset = jiffies + (10 * HZ);
178
179 rtnl_unlock();
180}
181
182static int fm10k_handle_reset(struct fm10k_intfc *interface)
183{
184 struct net_device *netdev = interface->netdev;
185 struct fm10k_hw *hw = &interface->hw;
186 int err;
187
188 rtnl_lock();
189
190 pci_set_master(interface->pdev);
191
192 /* reset and initialize the hardware so it is in a known state */
193 err = hw->mac.ops.reset_hw(hw);
194 if (err) {
195 dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
196 goto reinit_err;
197 }
198
199 err = hw->mac.ops.init_hw(hw);
200 if (err) {
201 dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
202 goto reinit_err;
203 }
204
205 err = fm10k_init_queueing_scheme(interface);
206 if (err) {
207 dev_err(&interface->pdev->dev,
208 "init_queueing_scheme failed: %d\n", err);
209 goto reinit_err;
210 }
211
212 /* re-associate interrupts */
213 err = fm10k_mbx_request_irq(interface);
214 if (err)
215 goto err_mbx_irq;
216
217 err = fm10k_hw_ready(interface);
218 if (err)
219 goto err_open;
220
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;
228 }
229
230 if (hw->mac.vlan_override)
231 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
232 else
233 netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
234 }
235
236 err = netif_running(netdev) ? fm10k_open(netdev) : 0;
237 if (err)
238 goto err_open;
239
240 fm10k_iov_resume(interface->pdev);
241
242 rtnl_unlock();
243
244 clear_bit(__FM10K_RESETTING, &interface->state);
245
246 return err;
247err_open:
248 fm10k_mbx_free_irq(interface);
249err_mbx_irq:
250 fm10k_clear_queueing_scheme(interface);
251reinit_err:
252 netif_device_detach(netdev);
253
254 rtnl_unlock();
255
256 clear_bit(__FM10K_RESETTING, &interface->state);
257
258 return err;
259}
260
261static void fm10k_reinit(struct fm10k_intfc *interface)
262{
263 int err;
264
265 fm10k_prepare_for_reset(interface);
266
267 err = fm10k_handle_reset(interface);
268 if (err)
269 dev_err(&interface->pdev->dev,
270 "fm10k_handle_reset failed: %d\n", err);
271}
272
273static void fm10k_reset_subtask(struct fm10k_intfc *interface)
274{
275 if (!(interface->flags & FM10K_FLAG_RESET_REQUESTED))
276 return;
277
278 interface->flags &= ~FM10K_FLAG_RESET_REQUESTED;
279
280 netdev_err(interface->netdev, "Reset interface\n");
281
282 fm10k_reinit(interface);
283}
284
285/**
286 * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
287 * @interface: board private structure
288 *
289 * Configure the SWPRI to PC mapping for the port.
290 **/
291static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
292{
293 struct net_device *netdev = interface->netdev;
294 struct fm10k_hw *hw = &interface->hw;
295 int i;
296
297 /* clear flag indicating update is needed */
298 interface->flags &= ~FM10K_FLAG_SWPRI_CONFIG;
299
300 /* these registers are only available on the PF */
301 if (hw->mac.type != fm10k_mac_pf)
302 return;
303
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));
308}
309
310/**
311 * fm10k_watchdog_update_host_state - Update the link status based on host.
312 * @interface: board private structure
313 **/
314static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
315{
316 struct fm10k_hw *hw = &interface->hw;
317 s32 err;
318
319 if (test_bit(__FM10K_LINK_DOWN, &interface->state)) {
320 interface->host_ready = false;
321 if (time_is_after_jiffies(interface->link_down_event))
322 return;
323 clear_bit(__FM10K_LINK_DOWN, &interface->state);
324 }
325
326 if (interface->flags & FM10K_FLAG_SWPRI_CONFIG) {
327 if (rtnl_trylock()) {
328 fm10k_configure_swpri_map(interface);
329 rtnl_unlock();
330 }
331 }
332
333 /* lock the mailbox for transmit and receive */
334 fm10k_mbx_lock(interface);
335
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;
339
340 /* free the lock */
341 fm10k_mbx_unlock(interface);
342}
343
344/**
345 * fm10k_mbx_subtask - Process upstream and downstream mailboxes
346 * @interface: board private structure
347 *
348 * This function will process both the upstream and downstream mailboxes.
349 **/
350static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
351{
352 /* process upstream mailbox and update device state */
353 fm10k_watchdog_update_host_state(interface);
354
355 /* process downstream mailboxes */
356 fm10k_iov_mbx(interface);
357}
358
359/**
360 * fm10k_watchdog_host_is_ready - Update netdev status based on host ready
361 * @interface: board private structure
362 **/
363static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
364{
365 struct net_device *netdev = interface->netdev;
366
367 /* only continue if link state is currently down */
368 if (netif_carrier_ok(netdev))
369 return;
370
371 netif_info(interface, drv, netdev, "NIC Link is up\n");
372
373 netif_carrier_on(netdev);
374 netif_tx_wake_all_queues(netdev);
375}
376
377/**
378 * fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
379 * @interface: board private structure
380 **/
381static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
382{
383 struct net_device *netdev = interface->netdev;
384
385 /* only continue if link state is currently up */
386 if (!netif_carrier_ok(netdev))
387 return;
388
389 netif_info(interface, drv, netdev, "NIC Link is down\n");
390
391 netif_carrier_off(netdev);
392 netif_tx_stop_all_queues(netdev);
393}
394
395/**
396 * fm10k_update_stats - Update the board statistics counters.
397 * @interface: board private structure
398 **/
399void fm10k_update_stats(struct fm10k_intfc *interface)
400{
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;
410 u64 bytes, pkts;
411 int i;
412
413 /* ensure only one thread updates stats at a time */
414 if (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
415 return;
416
417 /* do not allow stats update via service task for next second */
418 interface->next_stats_update = jiffies + HZ;
419
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]);
423
424 if (!tx_ring)
425 continue;
426
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;
433 }
434
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;
441
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]);
445
446 if (!rx_ring)
447 continue;
448
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;
460 }
461
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;
472
473 hw->mac.ops.update_hw_stats(hw, &interface->stats);
474
475 for (i = 0; i < hw->mac.max_queues; i++) {
476 struct fm10k_hw_stats_q *q = &interface->stats.q[i];
477
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;
483 }
484
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;
490
491 /* Fill out the OS statistics structure */
492 net_stats->rx_errors = rx_errors;
493 net_stats->rx_dropped = interface->stats.nodesc_drop.count;
494
495 clear_bit(__FM10K_UPDATING_STATS, &interface->state);
496}
497
498/**
499 * fm10k_watchdog_flush_tx - flush queues on host not ready
500 * @interface - pointer to the device interface structure
501 **/
502static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
503{
504 int some_tx_pending = 0;
505 int i;
506
507 /* nothing to do if carrier is up */
508 if (netif_carrier_ok(interface->netdev))
509 return;
510
511 for (i = 0; i < interface->num_tx_queues; i++) {
512 struct fm10k_ring *tx_ring = interface->tx_ring[i];
513
514 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
515 some_tx_pending = 1;
516 break;
517 }
518 }
519
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.
523 */
524 if (some_tx_pending)
525 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
526}
527
528/**
529 * fm10k_watchdog_subtask - check and bring link up
530 * @interface - pointer to the device interface structure
531 **/
532static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
533{
534 /* if interface is down do nothing */
535 if (test_bit(__FM10K_DOWN, &interface->state) ||
536 test_bit(__FM10K_RESETTING, &interface->state))
537 return;
538
539 if (interface->host_ready)
540 fm10k_watchdog_host_is_ready(interface);
541 else
542 fm10k_watchdog_host_not_ready(interface);
543
544 /* update stats only once every second */
545 if (time_is_before_jiffies(interface->next_stats_update))
546 fm10k_update_stats(interface);
547
548 /* flush any uncompleted work */
549 fm10k_watchdog_flush_tx(interface);
550}
551
552/**
553 * fm10k_check_hang_subtask - check for hung queues and dropped interrupts
554 * @interface - pointer to the device interface structure
555 *
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.
560 */
561static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
562{
563 int i;
564
565 /* If we're down or resetting, just bail */
566 if (test_bit(__FM10K_DOWN, &interface->state) ||
567 test_bit(__FM10K_RESETTING, &interface->state))
568 return;
569
570 /* rate limit tx hang checks to only once every 2 seconds */
571 if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
572 return;
573 interface->next_tx_hang_check = jiffies + (2 * HZ);
574
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]);
579
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];
583
584 if (!qv->tx.count && !qv->rx.count)
585 continue;
586 writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
587 }
588 }
589}
590
591/**
592 * fm10k_service_task - manages and runs subtasks
593 * @work: pointer to work_struct containing our data
594 **/
595static void fm10k_service_task(struct work_struct *work)
596{
597 struct fm10k_intfc *interface;
598
599 interface = container_of(work, struct fm10k_intfc, service_task);
600
601 /* tasks run even when interface is down */
602 fm10k_mbx_subtask(interface);
603 fm10k_detach_subtask(interface);
604 fm10k_reset_subtask(interface);
605
606 /* tasks only run when interface is up */
607 fm10k_watchdog_subtask(interface);
608 fm10k_check_hang_subtask(interface);
609
610 /* release lock on service events to allow scheduling next event */
611 fm10k_service_event_complete(interface);
612}
613
614/**
615 * fm10k_configure_tx_ring - Configure Tx ring after Reset
616 * @interface: board private structure
617 * @ring: structure containing ring specific data
618 *
619 * Configure the Tx descriptor ring after a reset.
620 **/
621static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
622 struct fm10k_ring *ring)
623{
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;
630
631 /* disable queue to avoid issues while updating state */
632 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
633 fm10k_write_flush(hw);
634
635 /* possible poll here to verify ring resources have been cleaned */
636
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);
641
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);
645
646 /* store tail pointer */
647 ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
648
649 /* reset ntu and ntc to place SW in sync with hardware */
650 ring->next_to_clean = 0;
651 ring->next_to_use = 0;
652
653 /* Map interrupt */
654 if (ring->q_vector) {
655 txint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
656 txint |= FM10K_INT_MAP_TIMER0;
657 }
658
659 fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
660
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);
664
665 /* Initialize XPS */
666 if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, &ring->state) &&
667 ring->q_vector)
668 netif_set_xps_queue(ring->netdev,
669 &ring->q_vector->affinity_mask,
670 ring->queue_index);
671
672 /* enable queue */
673 fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
674}
675
676/**
677 * fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
678 * @interface: board private structure
679 * @ring: structure containing ring specific data
680 *
681 * Verify the Tx descriptor ring is ready for transmit.
682 **/
683static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
684 struct fm10k_ring *ring)
685{
686 struct fm10k_hw *hw = &interface->hw;
687 int wait_loop = 10;
688 u32 txdctl;
689 u8 reg_idx = ring->reg_idx;
690
691 /* if we are already enabled just exit */
692 if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
693 return;
694
695 /* poll to verify queue is enabled */
696 do {
697 usleep_range(1000, 2000);
698 txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
699 } while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
700 if (!wait_loop)
701 netif_err(interface, drv, interface->netdev,
702 "Could not enable Tx Queue %d\n", reg_idx);
703}
704
705/**
706 * fm10k_configure_tx - Configure Transmit Unit after Reset
707 * @interface: board private structure
708 *
709 * Configure the Tx unit of the MAC after a reset.
710 **/
711static void fm10k_configure_tx(struct fm10k_intfc *interface)
712{
713 int i;
714
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]);
718
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]);
722}
723
724/**
725 * fm10k_configure_rx_ring - Configure Rx ring after Reset
726 * @interface: board private structure
727 * @ring: structure containing ring specific data
728 *
729 * Configure the Rx descriptor ring after a reset.
730 **/
731static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
732 struct fm10k_ring *ring)
733{
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;
742
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);
747
748 /* possible poll here to verify ring resources have been cleaned */
749
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);
754
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);
758
759 /* store tail pointer */
760 ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
761
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;
766
767 /* Configure the Rx buffer size for one buff without split */
768 srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
769
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);
773
774 /* Enable drop on empty */
775#ifdef CONFIG_DCB
776 if (interface->pfc_en)
777 rx_pause = interface->pfc_en;
778#endif
779 if (!(rx_pause & BIT(ring->qos_pc)))
780 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
781
782 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
783
784 /* assign default VLAN to queue */
785 ring->vid = hw->mac.default_vid;
786
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;
790
791 /* Map interrupt */
792 if (ring->q_vector) {
793 rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
794 rxint |= FM10K_INT_MAP_TIMER1;
795 }
796
797 fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
798
799 /* enable queue */
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);
803
804 /* place buffers on ring for receive data */
805 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
806}
807
808/**
809 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
810 * @interface: board private structure
811 *
812 * Configure the drop enable bits for the Rx rings.
813 **/
814void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
815{
816 struct fm10k_hw *hw = &interface->hw;
817 u8 rx_pause = interface->rx_pause;
818 int i;
819
820#ifdef CONFIG_DCB
821 if (interface->pfc_en)
822 rx_pause = interface->pfc_en;
823
824#endif
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;
829
830 if (!(rx_pause & BIT(ring->qos_pc)))
831 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
832
833 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
834 }
835}
836
837/**
838 * fm10k_configure_dglort - Configure Receive DGLORT after reset
839 * @interface: board private structure
840 *
841 * Configure the DGLORT description and RSS tables.
842 **/
843static void fm10k_configure_dglort(struct fm10k_intfc *interface)
844{
845 struct fm10k_dglort_cfg dglort = { 0 };
846 struct fm10k_hw *hw = &interface->hw;
847 int i;
848 u32 mrqc;
849
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]);
853
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]);
857
858 /* Generate RSS hash based on packet types, TCP/UDP
859 * port numbers and/or IPv4/v6 src and dst addresses
860 */
861 mrqc = FM10K_MRQC_IPV4 |
862 FM10K_MRQC_TCP_IPV4 |
863 FM10K_MRQC_IPV6 |
864 FM10K_MRQC_TCP_IPV6;
865
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;
870
871 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
872
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);
878
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);
887 }
888
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);
900}
901
902/**
903 * fm10k_configure_rx - Configure Receive Unit after Reset
904 * @interface: board private structure
905 *
906 * Configure the Rx unit of the MAC after a reset.
907 **/
908static void fm10k_configure_rx(struct fm10k_intfc *interface)
909{
910 int i;
911
912 /* Configure SWPRI to PC map */
913 fm10k_configure_swpri_map(interface);
914
915 /* Configure RSS and DGLORT map */
916 fm10k_configure_dglort(interface);
917
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]);
921
922 /* possible poll here to verify that Rx rings are now enabled */
923}
924
925static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
926{
927 struct fm10k_q_vector *q_vector;
928 int q_idx;
929
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);
933 }
934}
935
936static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
937{
938 struct fm10k_q_vector *q_vector = data;
939
940 if (q_vector->rx.count || q_vector->tx.count)
941 napi_schedule_irqoff(&q_vector->napi);
942
943 return IRQ_HANDLED;
944}
945
946static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
947{
948 struct fm10k_intfc *interface = data;
949 struct fm10k_hw *hw = &interface->hw;
950 struct fm10k_mbx_info *mbx = &hw->mbx;
951
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) |
955 FM10K_ITR_ENABLE);
956
957 /* service upstream mailbox */
958 if (fm10k_mbx_trylock(interface)) {
959 mbx->ops.process(hw, mbx);
960 fm10k_mbx_unlock(interface);
961 }
962
963 hw->mac.get_host_state = true;
964 fm10k_service_event_schedule(interface);
965
966 return IRQ_HANDLED;
967}
968
969#ifdef CONFIG_NET_POLL_CONTROLLER
970/**
971 * fm10k_netpoll - A Polling 'interrupt' handler
972 * @netdev: network interface device structure
973 *
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.
976 **/
977void fm10k_netpoll(struct net_device *netdev)
978{
979 struct fm10k_intfc *interface = netdev_priv(netdev);
980 int i;
981
982 /* if interface is down do nothing */
983 if (test_bit(__FM10K_DOWN, &interface->state))
984 return;
985
986 for (i = 0; i < interface->num_q_vectors; i++)
987 fm10k_msix_clean_rings(0, interface->q_vector[i]);
988}
989
990#endif
991#define FM10K_ERR_MSG(type) case (type): error = #type; break
992static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
993 struct fm10k_fault *fault)
994{
995 struct pci_dev *pdev = interface->pdev;
996 struct fm10k_hw *hw = &interface->hw;
997 struct fm10k_iov_data *iov_data = interface->iov_data;
998 char *error;
999
1000 switch (type) {
1001 case FM10K_PCA_FAULT:
1002 switch (fault->type) {
1003 default:
1004 error = "Unknown PCA error";
1005 break;
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);
1013 }
1014 break;
1015 case FM10K_THI_FAULT:
1016 switch (fault->type) {
1017 default:
1018 error = "Unknown THI error";
1019 break;
1020 FM10K_ERR_MSG(THI_NO_FAULT);
1021 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1022 }
1023 break;
1024 case FM10K_FUM_FAULT:
1025 switch (fault->type) {
1026 default:
1027 error = "Unknown FUM error";
1028 break;
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);
1040 }
1041 break;
1042 default:
1043 error = "Undocumented fault";
1044 break;
1045 }
1046
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));
1051
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.
1060 */
1061 if (fault->func && iov_data) {
1062 int vf = fault->func - 1;
1063 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1064
1065 hw->iov.ops.reset_lport(hw, vf_info);
1066 hw->iov.ops.reset_resources(hw, vf_info);
1067
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);
1071
1072 /* reset_resources will disconnect from the mbx */
1073 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1074 }
1075}
1076
1077static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1078{
1079 struct fm10k_hw *hw = &interface->hw;
1080 struct fm10k_fault fault = { 0 };
1081 int type, err;
1082
1083 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1084 eicr;
1085 eicr >>= 1, type += FM10K_FAULT_SIZE) {
1086 /* only check if there is an error reported */
1087 if (!(eicr & 0x1))
1088 continue;
1089
1090 /* retrieve fault info */
1091 err = hw->mac.ops.get_fault(hw, type, &fault);
1092 if (err) {
1093 dev_err(&interface->pdev->dev,
1094 "error reading fault\n");
1095 continue;
1096 }
1097
1098 fm10k_handle_fault(interface, type, &fault);
1099 }
1100}
1101
1102static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1103{
1104 struct fm10k_hw *hw = &interface->hw;
1105 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1106 u32 maxholdq;
1107 int q;
1108
1109 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1110 return;
1111
1112 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1113 if (maxholdq)
1114 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1115 for (q = 255;;) {
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);
1120 } else {
1121 interface->rx_overrun_vf++;
1122 }
1123 }
1124
1125 maxholdq *= 2;
1126 if (!maxholdq)
1127 q &= ~(32 - 1);
1128
1129 if (!q)
1130 break;
1131
1132 if (q-- % 32)
1133 continue;
1134
1135 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1136 if (maxholdq)
1137 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1138 }
1139}
1140
1141static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1142{
1143 struct fm10k_intfc *interface = data;
1144 struct fm10k_hw *hw = &interface->hw;
1145 struct fm10k_mbx_info *mbx = &hw->mbx;
1146 u32 eicr;
1147
1148 /* unmask any set bits related to this interrupt */
1149 eicr = fm10k_read_reg(hw, FM10K_EICR);
1150 fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
1151 FM10K_EICR_SWITCHREADY |
1152 FM10K_EICR_SWITCHNOTREADY));
1153
1154 /* report any faults found to the message log */
1155 fm10k_report_fault(interface, eicr);
1156
1157 /* reset any queues disabled due to receiver overrun */
1158 fm10k_reset_drop_on_empty(interface, eicr);
1159
1160 /* service mailboxes */
1161 if (fm10k_mbx_trylock(interface)) {
1162 mbx->ops.process(hw, mbx);
1163 /* handle VFLRE events */
1164 fm10k_iov_event(interface);
1165 fm10k_mbx_unlock(interface);
1166 }
1167
1168 /* if switch toggled state we should reset GLORTs */
1169 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1170 /* force link down for at least 4 seconds */
1171 interface->link_down_event = jiffies + (4 * HZ);
1172 set_bit(__FM10K_LINK_DOWN, &interface->state);
1173
1174 /* reset dglort_map back to no config */
1175 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1176 }
1177
1178 /* we should validate host state after interrupt event */
1179 hw->mac.get_host_state = true;
1180
1181 /* validate host state, and handle VF mailboxes in the service task */
1182 fm10k_service_event_schedule(interface);
1183
1184 /* re-enable mailbox interrupt and indicate 20us delay */
1185 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1186 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1187 FM10K_ITR_ENABLE);
1188
1189 return IRQ_HANDLED;
1190}
1191
1192void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1193{
1194 struct fm10k_hw *hw = &interface->hw;
1195 struct msix_entry *entry;
1196 int itr_reg;
1197
1198 /* no mailbox IRQ to free if MSI-X is not enabled */
1199 if (!interface->msix_entries)
1200 return;
1201
1202 entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1203
1204 /* disconnect the mailbox */
1205 hw->mbx.ops.disconnect(hw, &hw->mbx);
1206
1207 /* disable Mailbox cause */
1208 if (hw->mac.type == fm10k_mac_pf) {
1209 fm10k_write_reg(hw, FM10K_EIMR,
1210 FM10K_EIMR_DISABLE(PCA_FAULT) |
1211 FM10K_EIMR_DISABLE(FUM_FAULT) |
1212 FM10K_EIMR_DISABLE(MAILBOX) |
1213 FM10K_EIMR_DISABLE(SWITCHREADY) |
1214 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1215 FM10K_EIMR_DISABLE(SRAMERROR) |
1216 FM10K_EIMR_DISABLE(VFLR) |
1217 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1218 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1219 } else {
1220 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1221 }
1222
1223 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1224
1225 free_irq(entry->vector, interface);
1226}
1227
1228static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1229 struct fm10k_mbx_info *mbx)
1230{
1231 bool vlan_override = hw->mac.vlan_override;
1232 u16 default_vid = hw->mac.default_vid;
1233 struct fm10k_intfc *interface;
1234 s32 err;
1235
1236 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1237 if (err)
1238 return err;
1239
1240 interface = container_of(hw, struct fm10k_intfc, hw);
1241
1242 /* MAC was changed so we need reset */
1243 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1244 !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1245 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1246
1247 /* VLAN override was changed, or default VLAN changed */
1248 if ((vlan_override != hw->mac.vlan_override) ||
1249 (default_vid != hw->mac.default_vid))
1250 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1251
1252 return 0;
1253}
1254
1255/* generic error handler for mailbox issues */
1256static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1257 struct fm10k_mbx_info __always_unused *mbx)
1258{
1259 struct fm10k_intfc *interface;
1260 struct pci_dev *pdev;
1261
1262 interface = container_of(hw, struct fm10k_intfc, hw);
1263 pdev = interface->pdev;
1264
1265 dev_err(&pdev->dev, "Unknown message ID %u\n",
1266 **results & FM10K_TLV_ID_MASK);
1267
1268 return 0;
1269}
1270
1271static const struct fm10k_msg_data vf_mbx_data[] = {
1272 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1273 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1274 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1275 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1276};
1277
1278static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1279{
1280 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1281 struct net_device *dev = interface->netdev;
1282 struct fm10k_hw *hw = &interface->hw;
1283 int err;
1284
1285 /* Use timer0 for interrupt moderation on the mailbox */
1286 u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1287
1288 /* register mailbox handlers */
1289 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1290 if (err)
1291 return err;
1292
1293 /* request the IRQ */
1294 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1295 dev->name, interface);
1296 if (err) {
1297 netif_err(interface, probe, dev,
1298 "request_irq for msix_mbx failed: %d\n", err);
1299 return err;
1300 }
1301
1302 /* map all of the interrupt sources */
1303 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1304
1305 /* enable interrupt */
1306 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1307
1308 return 0;
1309}
1310
1311static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1312 struct fm10k_mbx_info *mbx)
1313{
1314 struct fm10k_intfc *interface;
1315 u32 dglort_map = hw->mac.dglort_map;
1316 s32 err;
1317
1318 interface = container_of(hw, struct fm10k_intfc, hw);
1319
1320 err = fm10k_msg_err_pf(hw, results, mbx);
1321 if (!err && hw->swapi.status) {
1322 /* force link down for a reasonable delay */
1323 interface->link_down_event = jiffies + (2 * HZ);
1324 set_bit(__FM10K_LINK_DOWN, &interface->state);
1325
1326 /* reset dglort_map back to no config */
1327 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1328
1329 fm10k_service_event_schedule(interface);
1330
1331 /* prevent overloading kernel message buffer */
1332 if (interface->lport_map_failed)
1333 return 0;
1334
1335 interface->lport_map_failed = true;
1336
1337 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1338 dev_warn(&interface->pdev->dev,
1339 "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1340 dev_warn(&interface->pdev->dev,
1341 "request logical port map failed: %d\n",
1342 hw->swapi.status);
1343
1344 return 0;
1345 }
1346
1347 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1348 if (err)
1349 return err;
1350
1351 interface->lport_map_failed = false;
1352
1353 /* we need to reset if port count was just updated */
1354 if (dglort_map != hw->mac.dglort_map)
1355 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1356
1357 return 0;
1358}
1359
1360static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1361 struct fm10k_mbx_info __always_unused *mbx)
1362{
1363 struct fm10k_intfc *interface;
1364 u16 glort, pvid;
1365 u32 pvid_update;
1366 s32 err;
1367
1368 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1369 &pvid_update);
1370 if (err)
1371 return err;
1372
1373 /* extract values from the pvid update */
1374 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1375 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1376
1377 /* if glort is not valid return error */
1378 if (!fm10k_glort_valid_pf(hw, glort))
1379 return FM10K_ERR_PARAM;
1380
1381 /* verify VLAN ID is valid */
1382 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1383 return FM10K_ERR_PARAM;
1384
1385 interface = container_of(hw, struct fm10k_intfc, hw);
1386
1387 /* check to see if this belongs to one of the VFs */
1388 err = fm10k_iov_update_pvid(interface, glort, pvid);
1389 if (!err)
1390 return 0;
1391
1392 /* we need to reset if default VLAN was just updated */
1393 if (pvid != hw->mac.default_vid)
1394 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1395
1396 hw->mac.default_vid = pvid;
1397
1398 return 0;
1399}
1400
1401static const struct fm10k_msg_data pf_mbx_data[] = {
1402 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1403 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1404 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1405 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1406 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1407 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1408 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1409};
1410
1411static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1412{
1413 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1414 struct net_device *dev = interface->netdev;
1415 struct fm10k_hw *hw = &interface->hw;
1416 int err;
1417
1418 /* Use timer0 for interrupt moderation on the mailbox */
1419 u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1420 u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1421
1422 /* register mailbox handlers */
1423 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1424 if (err)
1425 return err;
1426
1427 /* request the IRQ */
1428 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1429 dev->name, interface);
1430 if (err) {
1431 netif_err(interface, probe, dev,
1432 "request_irq for msix_mbx failed: %d\n", err);
1433 return err;
1434 }
1435
1436 /* Enable interrupts w/ no moderation for "other" interrupts */
1437 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1438 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1439 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1440 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1441 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1442
1443 /* Enable interrupts w/ moderation for mailbox */
1444 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1445
1446 /* Enable individual interrupt causes */
1447 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1448 FM10K_EIMR_ENABLE(FUM_FAULT) |
1449 FM10K_EIMR_ENABLE(MAILBOX) |
1450 FM10K_EIMR_ENABLE(SWITCHREADY) |
1451 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1452 FM10K_EIMR_ENABLE(SRAMERROR) |
1453 FM10K_EIMR_ENABLE(VFLR) |
1454 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1455
1456 /* enable interrupt */
1457 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1458
1459 return 0;
1460}
1461
1462int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1463{
1464 struct fm10k_hw *hw = &interface->hw;
1465 int err;
1466
1467 /* enable Mailbox cause */
1468 if (hw->mac.type == fm10k_mac_pf)
1469 err = fm10k_mbx_request_irq_pf(interface);
1470 else
1471 err = fm10k_mbx_request_irq_vf(interface);
1472 if (err)
1473 return err;
1474
1475 /* connect mailbox */
1476 err = hw->mbx.ops.connect(hw, &hw->mbx);
1477
1478 /* if the mailbox failed to connect, then free IRQ */
1479 if (err)
1480 fm10k_mbx_free_irq(interface);
1481
1482 return err;
1483}
1484
1485/**
1486 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1487 * @interface: board private structure
1488 *
1489 * Release all interrupts associated with this interface
1490 **/
1491void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1492{
1493 int vector = interface->num_q_vectors;
1494 struct fm10k_hw *hw = &interface->hw;
1495 struct msix_entry *entry;
1496
1497 entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
1498
1499 while (vector) {
1500 struct fm10k_q_vector *q_vector;
1501
1502 vector--;
1503 entry--;
1504 q_vector = interface->q_vector[vector];
1505
1506 if (!q_vector->tx.count && !q_vector->rx.count)
1507 continue;
1508
1509 /* clear the affinity_mask in the IRQ descriptor */
1510 irq_set_affinity_hint(entry->vector, NULL);
1511
1512 /* disable interrupts */
1513 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1514
1515 free_irq(entry->vector, q_vector);
1516 }
1517}
1518
1519/**
1520 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1521 * @interface: board private structure
1522 *
1523 * Attempts to configure interrupts using the best available
1524 * capabilities of the hardware and kernel.
1525 **/
1526int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1527{
1528 struct net_device *dev = interface->netdev;
1529 struct fm10k_hw *hw = &interface->hw;
1530 struct msix_entry *entry;
1531 int ri = 0, ti = 0;
1532 int vector, err;
1533
1534 entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
1535
1536 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1537 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1538
1539 /* name the vector */
1540 if (q_vector->tx.count && q_vector->rx.count) {
1541 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1542 "%s-TxRx-%d", dev->name, ri++);
1543 ti++;
1544 } else if (q_vector->rx.count) {
1545 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1546 "%s-rx-%d", dev->name, ri++);
1547 } else if (q_vector->tx.count) {
1548 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1549 "%s-tx-%d", dev->name, ti++);
1550 } else {
1551 /* skip this unused q_vector */
1552 continue;
1553 }
1554
1555 /* Assign ITR register to q_vector */
1556 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1557 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1558 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1559
1560 /* request the IRQ */
1561 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1562 q_vector->name, q_vector);
1563 if (err) {
1564 netif_err(interface, probe, dev,
1565 "request_irq failed for MSIX interrupt Error: %d\n",
1566 err);
1567 goto err_out;
1568 }
1569
1570 /* assign the mask for this irq */
1571 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1572
1573 /* Enable q_vector */
1574 writel(FM10K_ITR_ENABLE, q_vector->itr);
1575
1576 entry++;
1577 }
1578
1579 return 0;
1580
1581err_out:
1582 /* wind through the ring freeing all entries and vectors */
1583 while (vector) {
1584 struct fm10k_q_vector *q_vector;
1585
1586 entry--;
1587 vector--;
1588 q_vector = interface->q_vector[vector];
1589
1590 if (!q_vector->tx.count && !q_vector->rx.count)
1591 continue;
1592
1593 /* clear the affinity_mask in the IRQ descriptor */
1594 irq_set_affinity_hint(entry->vector, NULL);
1595
1596 /* disable interrupts */
1597 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1598
1599 free_irq(entry->vector, q_vector);
1600 }
1601
1602 return err;
1603}
1604
1605void fm10k_up(struct fm10k_intfc *interface)
1606{
1607 struct fm10k_hw *hw = &interface->hw;
1608
1609 /* Enable Tx/Rx DMA */
1610 hw->mac.ops.start_hw(hw);
1611
1612 /* configure Tx descriptor rings */
1613 fm10k_configure_tx(interface);
1614
1615 /* configure Rx descriptor rings */
1616 fm10k_configure_rx(interface);
1617
1618 /* configure interrupts */
1619 hw->mac.ops.update_int_moderator(hw);
1620
1621 /* enable statistics capture again */
1622 clear_bit(__FM10K_UPDATING_STATS, &interface->state);
1623
1624 /* clear down bit to indicate we are ready to go */
1625 clear_bit(__FM10K_DOWN, &interface->state);
1626
1627 /* enable polling cleanups */
1628 fm10k_napi_enable_all(interface);
1629
1630 /* re-establish Rx filters */
1631 fm10k_restore_rx_state(interface);
1632
1633 /* enable transmits */
1634 netif_tx_start_all_queues(interface->netdev);
1635
1636 /* kick off the service timer now */
1637 hw->mac.get_host_state = true;
1638 mod_timer(&interface->service_timer, jiffies);
1639}
1640
1641static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1642{
1643 struct fm10k_q_vector *q_vector;
1644 int q_idx;
1645
1646 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1647 q_vector = interface->q_vector[q_idx];
1648 napi_disable(&q_vector->napi);
1649 }
1650}
1651
1652void fm10k_down(struct fm10k_intfc *interface)
1653{
1654 struct net_device *netdev = interface->netdev;
1655 struct fm10k_hw *hw = &interface->hw;
1656 int err, i = 0, count = 0;
1657
1658 /* signal that we are down to the interrupt handler and service task */
1659 if (test_and_set_bit(__FM10K_DOWN, &interface->state))
1660 return;
1661
1662 /* call carrier off first to avoid false dev_watchdog timeouts */
1663 netif_carrier_off(netdev);
1664
1665 /* disable transmits */
1666 netif_tx_stop_all_queues(netdev);
1667 netif_tx_disable(netdev);
1668
1669 /* reset Rx filters */
1670 fm10k_reset_rx_state(interface);
1671
1672 /* disable polling routines */
1673 fm10k_napi_disable_all(interface);
1674
1675 /* capture stats one last time before stopping interface */
1676 fm10k_update_stats(interface);
1677
1678 /* prevent updating statistics while we're down */
1679 while (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
1680 usleep_range(1000, 2000);
1681
1682 /* skip waiting for TX DMA if we lost PCIe link */
1683 if (FM10K_REMOVED(hw->hw_addr))
1684 goto skip_tx_dma_drain;
1685
1686 /* In some rare circumstances it can take a while for Tx queues to
1687 * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1688 * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1689 * until the Tx queues have emptied, or until a number of retries. If
1690 * we fail to clear within the retry loop, we will issue a warning
1691 * indicating that Tx DMA is probably hung. Note this means we call
1692 * .stop_hw() twice but this shouldn't cause any problems.
1693 */
1694 err = hw->mac.ops.stop_hw(hw);
1695 if (err != FM10K_ERR_REQUESTS_PENDING)
1696 goto skip_tx_dma_drain;
1697
1698#define TX_DMA_DRAIN_RETRIES 25
1699 for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1700 usleep_range(10000, 20000);
1701
1702 /* start checking at the last ring to have pending Tx */
1703 for (; i < interface->num_tx_queues; i++)
1704 if (fm10k_get_tx_pending(interface->tx_ring[i], false))
1705 break;
1706
1707 /* if all the queues are drained, we can break now */
1708 if (i == interface->num_tx_queues)
1709 break;
1710 }
1711
1712 if (count >= TX_DMA_DRAIN_RETRIES)
1713 dev_err(&interface->pdev->dev,
1714 "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1715 count);
1716skip_tx_dma_drain:
1717 /* Disable DMA engine for Tx/Rx */
1718 err = hw->mac.ops.stop_hw(hw);
1719 if (err == FM10K_ERR_REQUESTS_PENDING)
1720 dev_err(&interface->pdev->dev,
1721 "due to pending requests hw was not shut down gracefully\n");
1722 else if (err)
1723 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1724
1725 /* free any buffers still on the rings */
1726 fm10k_clean_all_tx_rings(interface);
1727 fm10k_clean_all_rx_rings(interface);
1728}
1729
1730/**
1731 * fm10k_sw_init - Initialize general software structures
1732 * @interface: host interface private structure to initialize
1733 *
1734 * fm10k_sw_init initializes the interface private data structure.
1735 * Fields are initialized based on PCI device information and
1736 * OS network device settings (MTU size).
1737 **/
1738static int fm10k_sw_init(struct fm10k_intfc *interface,
1739 const struct pci_device_id *ent)
1740{
1741 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1742 struct fm10k_hw *hw = &interface->hw;
1743 struct pci_dev *pdev = interface->pdev;
1744 struct net_device *netdev = interface->netdev;
1745 u32 rss_key[FM10K_RSSRK_SIZE];
1746 unsigned int rss;
1747 int err;
1748
1749 /* initialize back pointer */
1750 hw->back = interface;
1751 hw->hw_addr = interface->uc_addr;
1752
1753 /* PCI config space info */
1754 hw->vendor_id = pdev->vendor;
1755 hw->device_id = pdev->device;
1756 hw->revision_id = pdev->revision;
1757 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1758 hw->subsystem_device_id = pdev->subsystem_device;
1759
1760 /* Setup hw api */
1761 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1762 hw->mac.type = fi->mac;
1763
1764 /* Setup IOV handlers */
1765 if (fi->iov_ops)
1766 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1767
1768 /* Set common capability flags and settings */
1769 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
1770 interface->ring_feature[RING_F_RSS].limit = rss;
1771 fi->get_invariants(hw);
1772
1773 /* pick up the PCIe bus settings for reporting later */
1774 if (hw->mac.ops.get_bus_info)
1775 hw->mac.ops.get_bus_info(hw);
1776
1777 /* limit the usable DMA range */
1778 if (hw->mac.ops.set_dma_mask)
1779 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
1780
1781 /* update netdev with DMA restrictions */
1782 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
1783 netdev->features |= NETIF_F_HIGHDMA;
1784 netdev->vlan_features |= NETIF_F_HIGHDMA;
1785 }
1786
1787 /* delay any future reset requests */
1788 interface->last_reset = jiffies + (10 * HZ);
1789
1790 /* reset and initialize the hardware so it is in a known state */
1791 err = hw->mac.ops.reset_hw(hw);
1792 if (err) {
1793 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
1794 return err;
1795 }
1796
1797 err = hw->mac.ops.init_hw(hw);
1798 if (err) {
1799 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
1800 return err;
1801 }
1802
1803 /* initialize hardware statistics */
1804 hw->mac.ops.update_hw_stats(hw, &interface->stats);
1805
1806 /* Set upper limit on IOV VFs that can be allocated */
1807 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
1808
1809 /* Start with random Ethernet address */
1810 eth_random_addr(hw->mac.addr);
1811
1812 /* Initialize MAC address from hardware */
1813 err = hw->mac.ops.read_mac_addr(hw);
1814 if (err) {
1815 dev_warn(&pdev->dev,
1816 "Failed to obtain MAC address defaulting to random\n");
1817 /* tag address assignment as random */
1818 netdev->addr_assign_type |= NET_ADDR_RANDOM;
1819 }
1820
1821 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
1822 ether_addr_copy(netdev->perm_addr, hw->mac.addr);
1823
1824 if (!is_valid_ether_addr(netdev->perm_addr)) {
1825 dev_err(&pdev->dev, "Invalid MAC Address\n");
1826 return -EIO;
1827 }
1828
1829 /* initialize DCBNL interface */
1830 fm10k_dcbnl_set_ops(netdev);
1831
1832 /* set default ring sizes */
1833 interface->tx_ring_count = FM10K_DEFAULT_TXD;
1834 interface->rx_ring_count = FM10K_DEFAULT_RXD;
1835
1836 /* set default interrupt moderation */
1837 interface->tx_itr = FM10K_TX_ITR_DEFAULT;
1838 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
1839
1840 /* initialize udp port lists */
1841 INIT_LIST_HEAD(&interface->vxlan_port);
1842 INIT_LIST_HEAD(&interface->geneve_port);
1843
1844 netdev_rss_key_fill(rss_key, sizeof(rss_key));
1845 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
1846
1847 /* Start off interface as being down */
1848 set_bit(__FM10K_DOWN, &interface->state);
1849 set_bit(__FM10K_UPDATING_STATS, &interface->state);
1850
1851 return 0;
1852}
1853
1854static void fm10k_slot_warn(struct fm10k_intfc *interface)
1855{
1856 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
1857 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
1858 struct fm10k_hw *hw = &interface->hw;
1859 int max_gts = 0, expected_gts = 0;
1860
1861 if (pcie_get_minimum_link(interface->pdev, &speed, &width) ||
1862 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
1863 dev_warn(&interface->pdev->dev,
1864 "Unable to determine PCI Express bandwidth.\n");
1865 return;
1866 }
1867
1868 switch (speed) {
1869 case PCIE_SPEED_2_5GT:
1870 /* 8b/10b encoding reduces max throughput by 20% */
1871 max_gts = 2 * width;
1872 break;
1873 case PCIE_SPEED_5_0GT:
1874 /* 8b/10b encoding reduces max throughput by 20% */
1875 max_gts = 4 * width;
1876 break;
1877 case PCIE_SPEED_8_0GT:
1878 /* 128b/130b encoding has less than 2% impact on throughput */
1879 max_gts = 8 * width;
1880 break;
1881 default:
1882 dev_warn(&interface->pdev->dev,
1883 "Unable to determine PCI Express bandwidth.\n");
1884 return;
1885 }
1886
1887 dev_info(&interface->pdev->dev,
1888 "PCI Express bandwidth of %dGT/s available\n",
1889 max_gts);
1890 dev_info(&interface->pdev->dev,
1891 "(Speed:%s, Width: x%d, Encoding Loss:%s, Payload:%s)\n",
1892 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
1893 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
1894 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
1895 "Unknown"),
1896 hw->bus.width,
1897 (speed == PCIE_SPEED_2_5GT ? "20%" :
1898 speed == PCIE_SPEED_5_0GT ? "20%" :
1899 speed == PCIE_SPEED_8_0GT ? "<2%" :
1900 "Unknown"),
1901 (hw->bus.payload == fm10k_bus_payload_128 ? "128B" :
1902 hw->bus.payload == fm10k_bus_payload_256 ? "256B" :
1903 hw->bus.payload == fm10k_bus_payload_512 ? "512B" :
1904 "Unknown"));
1905
1906 switch (hw->bus_caps.speed) {
1907 case fm10k_bus_speed_2500:
1908 /* 8b/10b encoding reduces max throughput by 20% */
1909 expected_gts = 2 * hw->bus_caps.width;
1910 break;
1911 case fm10k_bus_speed_5000:
1912 /* 8b/10b encoding reduces max throughput by 20% */
1913 expected_gts = 4 * hw->bus_caps.width;
1914 break;
1915 case fm10k_bus_speed_8000:
1916 /* 128b/130b encoding has less than 2% impact on throughput */
1917 expected_gts = 8 * hw->bus_caps.width;
1918 break;
1919 default:
1920 dev_warn(&interface->pdev->dev,
1921 "Unable to determine expected PCI Express bandwidth.\n");
1922 return;
1923 }
1924
1925 if (max_gts >= expected_gts)
1926 return;
1927
1928 dev_warn(&interface->pdev->dev,
1929 "This device requires %dGT/s of bandwidth for optimal performance.\n",
1930 expected_gts);
1931 dev_warn(&interface->pdev->dev,
1932 "A %sslot with x%d lanes is suggested.\n",
1933 (hw->bus_caps.speed == fm10k_bus_speed_2500 ? "2.5GT/s " :
1934 hw->bus_caps.speed == fm10k_bus_speed_5000 ? "5.0GT/s " :
1935 hw->bus_caps.speed == fm10k_bus_speed_8000 ? "8.0GT/s " : ""),
1936 hw->bus_caps.width);
1937}
1938
1939/**
1940 * fm10k_probe - Device Initialization Routine
1941 * @pdev: PCI device information struct
1942 * @ent: entry in fm10k_pci_tbl
1943 *
1944 * Returns 0 on success, negative on failure
1945 *
1946 * fm10k_probe initializes an interface identified by a pci_dev structure.
1947 * The OS initialization, configuring of the interface private structure,
1948 * and a hardware reset occur.
1949 **/
1950static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1951{
1952 struct net_device *netdev;
1953 struct fm10k_intfc *interface;
1954 int err;
1955
1956 if (pdev->error_state != pci_channel_io_normal) {
1957 dev_err(&pdev->dev,
1958 "PCI device still in an error state. Unable to load...\n");
1959 return -EIO;
1960 }
1961
1962 err = pci_enable_device_mem(pdev);
1963 if (err) {
1964 dev_err(&pdev->dev,
1965 "PCI enable device failed: %d\n", err);
1966 return err;
1967 }
1968
1969 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
1970 if (err)
1971 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1972 if (err) {
1973 dev_err(&pdev->dev,
1974 "DMA configuration failed: %d\n", err);
1975 goto err_dma;
1976 }
1977
1978 err = pci_request_mem_regions(pdev, fm10k_driver_name);
1979 if (err) {
1980 dev_err(&pdev->dev,
1981 "pci_request_selected_regions failed: %d\n", err);
1982 goto err_pci_reg;
1983 }
1984
1985 pci_enable_pcie_error_reporting(pdev);
1986
1987 pci_set_master(pdev);
1988 pci_save_state(pdev);
1989
1990 netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
1991 if (!netdev) {
1992 err = -ENOMEM;
1993 goto err_alloc_netdev;
1994 }
1995
1996 SET_NETDEV_DEV(netdev, &pdev->dev);
1997
1998 interface = netdev_priv(netdev);
1999 pci_set_drvdata(pdev, interface);
2000
2001 interface->netdev = netdev;
2002 interface->pdev = pdev;
2003
2004 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
2005 FM10K_UC_ADDR_SIZE);
2006 if (!interface->uc_addr) {
2007 err = -EIO;
2008 goto err_ioremap;
2009 }
2010
2011 err = fm10k_sw_init(interface, ent);
2012 if (err)
2013 goto err_sw_init;
2014
2015 /* enable debugfs support */
2016 fm10k_dbg_intfc_init(interface);
2017
2018 err = fm10k_init_queueing_scheme(interface);
2019 if (err)
2020 goto err_sw_init;
2021
2022 /* the mbx interrupt might attempt to schedule the service task, so we
2023 * must ensure it is disabled since we haven't yet requested the timer
2024 * or work item.
2025 */
2026 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2027
2028 err = fm10k_mbx_request_irq(interface);
2029 if (err)
2030 goto err_mbx_interrupt;
2031
2032 /* final check of hardware state before registering the interface */
2033 err = fm10k_hw_ready(interface);
2034 if (err)
2035 goto err_register;
2036
2037 err = register_netdev(netdev);
2038 if (err)
2039 goto err_register;
2040
2041 /* carrier off reporting is important to ethtool even BEFORE open */
2042 netif_carrier_off(netdev);
2043
2044 /* stop all the transmit queues from transmitting until link is up */
2045 netif_tx_stop_all_queues(netdev);
2046
2047 /* Initialize service timer and service task late in order to avoid
2048 * cleanup issues.
2049 */
2050 setup_timer(&interface->service_timer, &fm10k_service_timer,
2051 (unsigned long)interface);
2052 INIT_WORK(&interface->service_task, fm10k_service_task);
2053
2054 /* kick off service timer now, even when interface is down */
2055 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2056
2057 /* print warning for non-optimal configurations */
2058 fm10k_slot_warn(interface);
2059
2060 /* report MAC address for logging */
2061 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2062
2063 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2064 fm10k_iov_configure(pdev, 0);
2065
2066 /* clear the service task disable bit to allow service task to start */
2067 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2068
2069 return 0;
2070
2071err_register:
2072 fm10k_mbx_free_irq(interface);
2073err_mbx_interrupt:
2074 fm10k_clear_queueing_scheme(interface);
2075err_sw_init:
2076 if (interface->sw_addr)
2077 iounmap(interface->sw_addr);
2078 iounmap(interface->uc_addr);
2079err_ioremap:
2080 free_netdev(netdev);
2081err_alloc_netdev:
2082 pci_release_mem_regions(pdev);
2083err_pci_reg:
2084err_dma:
2085 pci_disable_device(pdev);
2086 return err;
2087}
2088
2089/**
2090 * fm10k_remove - Device Removal Routine
2091 * @pdev: PCI device information struct
2092 *
2093 * fm10k_remove is called by the PCI subsystem to alert the driver
2094 * that it should release a PCI device. The could be caused by a
2095 * Hot-Plug event, or because the driver is going to be removed from
2096 * memory.
2097 **/
2098static void fm10k_remove(struct pci_dev *pdev)
2099{
2100 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2101 struct net_device *netdev = interface->netdev;
2102
2103 del_timer_sync(&interface->service_timer);
2104
2105 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2106 cancel_work_sync(&interface->service_task);
2107
2108 /* free netdev, this may bounce the interrupts due to setup_tc */
2109 if (netdev->reg_state == NETREG_REGISTERED)
2110 unregister_netdev(netdev);
2111
2112 /* release VFs */
2113 fm10k_iov_disable(pdev);
2114
2115 /* disable mailbox interrupt */
2116 fm10k_mbx_free_irq(interface);
2117
2118 /* free interrupts */
2119 fm10k_clear_queueing_scheme(interface);
2120
2121 /* remove any debugfs interfaces */
2122 fm10k_dbg_intfc_exit(interface);
2123
2124 if (interface->sw_addr)
2125 iounmap(interface->sw_addr);
2126 iounmap(interface->uc_addr);
2127
2128 free_netdev(netdev);
2129
2130 pci_release_mem_regions(pdev);
2131
2132 pci_disable_pcie_error_reporting(pdev);
2133
2134 pci_disable_device(pdev);
2135}
2136
2137static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2138{
2139 /* the watchdog task reads from registers, which might appear like
2140 * a surprise remove if the PCIe device is disabled while we're
2141 * stopped. We stop the watchdog task until after we resume software
2142 * activity.
2143 */
2144 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2145 cancel_work_sync(&interface->service_task);
2146
2147 fm10k_prepare_for_reset(interface);
2148}
2149
2150static int fm10k_handle_resume(struct fm10k_intfc *interface)
2151{
2152 struct fm10k_hw *hw = &interface->hw;
2153 int err;
2154
2155 /* reset statistics starting values */
2156 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2157
2158 err = fm10k_handle_reset(interface);
2159 if (err)
2160 return err;
2161
2162 /* assume host is not ready, to prevent race with watchdog in case we
2163 * actually don't have connection to the switch
2164 */
2165 interface->host_ready = false;
2166 fm10k_watchdog_host_not_ready(interface);
2167
2168 /* force link to stay down for a second to prevent link flutter */
2169 interface->link_down_event = jiffies + (HZ);
2170 set_bit(__FM10K_LINK_DOWN, &interface->state);
2171
2172 /* clear the service task disable bit to allow service task to start */
2173 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2174 fm10k_service_event_schedule(interface);
2175
2176 return err;
2177}
2178
2179#ifdef CONFIG_PM
2180/**
2181 * fm10k_resume - Restore device to pre-sleep state
2182 * @pdev: PCI device information struct
2183 *
2184 * fm10k_resume is called after the system has powered back up from a sleep
2185 * state and is ready to resume operation. This function is meant to restore
2186 * the device back to its pre-sleep state.
2187 **/
2188static int fm10k_resume(struct pci_dev *pdev)
2189{
2190 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2191 struct net_device *netdev = interface->netdev;
2192 struct fm10k_hw *hw = &interface->hw;
2193 u32 err;
2194
2195 pci_set_power_state(pdev, PCI_D0);
2196 pci_restore_state(pdev);
2197
2198 /* pci_restore_state clears dev->state_saved so call
2199 * pci_save_state to restore it.
2200 */
2201 pci_save_state(pdev);
2202
2203 err = pci_enable_device_mem(pdev);
2204 if (err) {
2205 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2206 return err;
2207 }
2208 pci_set_master(pdev);
2209
2210 pci_wake_from_d3(pdev, false);
2211
2212 /* refresh hw_addr in case it was dropped */
2213 hw->hw_addr = interface->uc_addr;
2214
2215 err = fm10k_handle_resume(interface);
2216 if (err)
2217 return err;
2218
2219 netif_device_attach(netdev);
2220
2221 return 0;
2222}
2223
2224/**
2225 * fm10k_suspend - Prepare the device for a system sleep state
2226 * @pdev: PCI device information struct
2227 *
2228 * fm10k_suspend is meant to shutdown the device prior to the system entering
2229 * a sleep state. The fm10k hardware does not support wake on lan so the
2230 * driver simply needs to shut down the device so it is in a low power state.
2231 **/
2232static int fm10k_suspend(struct pci_dev *pdev,
2233 pm_message_t __always_unused state)
2234{
2235 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2236 struct net_device *netdev = interface->netdev;
2237 int err = 0;
2238
2239 netif_device_detach(netdev);
2240
2241 fm10k_prepare_suspend(interface);
2242
2243 err = pci_save_state(pdev);
2244 if (err)
2245 return err;
2246
2247 pci_disable_device(pdev);
2248 pci_wake_from_d3(pdev, false);
2249 pci_set_power_state(pdev, PCI_D3hot);
2250
2251 return 0;
2252}
2253
2254#endif /* CONFIG_PM */
2255/**
2256 * fm10k_io_error_detected - called when PCI error is detected
2257 * @pdev: Pointer to PCI device
2258 * @state: The current pci connection state
2259 *
2260 * This function is called after a PCI bus error affecting
2261 * this device has been detected.
2262 */
2263static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2264 pci_channel_state_t state)
2265{
2266 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2267 struct net_device *netdev = interface->netdev;
2268
2269 netif_device_detach(netdev);
2270
2271 if (state == pci_channel_io_perm_failure)
2272 return PCI_ERS_RESULT_DISCONNECT;
2273
2274 fm10k_prepare_suspend(interface);
2275
2276 /* Request a slot reset. */
2277 return PCI_ERS_RESULT_NEED_RESET;
2278}
2279
2280/**
2281 * fm10k_io_slot_reset - called after the pci bus has been reset.
2282 * @pdev: Pointer to PCI device
2283 *
2284 * Restart the card from scratch, as if from a cold-boot.
2285 */
2286static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2287{
2288 pci_ers_result_t result;
2289
2290 if (pci_reenable_device(pdev)) {
2291 dev_err(&pdev->dev,
2292 "Cannot re-enable PCI device after reset.\n");
2293 result = PCI_ERS_RESULT_DISCONNECT;
2294 } else {
2295 pci_set_master(pdev);
2296 pci_restore_state(pdev);
2297
2298 /* After second error pci->state_saved is false, this
2299 * resets it so EEH doesn't break.
2300 */
2301 pci_save_state(pdev);
2302
2303 pci_wake_from_d3(pdev, false);
2304
2305 result = PCI_ERS_RESULT_RECOVERED;
2306 }
2307
2308 pci_cleanup_aer_uncorrect_error_status(pdev);
2309
2310 return result;
2311}
2312
2313/**
2314 * fm10k_io_resume - called when traffic can start flowing again.
2315 * @pdev: Pointer to PCI device
2316 *
2317 * This callback is called when the error recovery driver tells us that
2318 * its OK to resume normal operation.
2319 */
2320static void fm10k_io_resume(struct pci_dev *pdev)
2321{
2322 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2323 struct net_device *netdev = interface->netdev;
2324 int err;
2325
2326 err = fm10k_handle_resume(interface);
2327
2328 if (err)
2329 dev_warn(&pdev->dev,
2330 "fm10k_io_resume failed: %d\n", err);
2331 else
2332 netif_device_attach(netdev);
2333}
2334
2335/**
2336 * fm10k_io_reset_notify - called when PCI function is reset
2337 * @pdev: Pointer to PCI device
2338 *
2339 * This callback is called when the PCI function is reset such as from
2340 * /sys/class/net/<enpX>/device/reset or similar. When prepare is true, it
2341 * means we should prepare for a function reset. If prepare is false, it means
2342 * the function reset just occurred.
2343 */
2344static void fm10k_io_reset_notify(struct pci_dev *pdev, bool prepare)
2345{
2346 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2347 int err = 0;
2348
2349 if (prepare) {
2350 /* warn incase we have any active VF devices */
2351 if (pci_num_vf(pdev))
2352 dev_warn(&pdev->dev,
2353 "PCIe FLR may cause issues for any active VF devices\n");
2354
2355 fm10k_prepare_suspend(interface);
2356 } else {
2357 err = fm10k_handle_resume(interface);
2358 }
2359
2360 if (err) {
2361 dev_warn(&pdev->dev,
2362 "fm10k_io_reset_notify failed: %d\n", err);
2363 netif_device_detach(interface->netdev);
2364 }
2365}
2366
2367static const struct pci_error_handlers fm10k_err_handler = {
2368 .error_detected = fm10k_io_error_detected,
2369 .slot_reset = fm10k_io_slot_reset,
2370 .resume = fm10k_io_resume,
2371 .reset_notify = fm10k_io_reset_notify,
2372};
2373
2374static struct pci_driver fm10k_driver = {
2375 .name = fm10k_driver_name,
2376 .id_table = fm10k_pci_tbl,
2377 .probe = fm10k_probe,
2378 .remove = fm10k_remove,
2379#ifdef CONFIG_PM
2380 .suspend = fm10k_suspend,
2381 .resume = fm10k_resume,
2382#endif
2383 .sriov_configure = fm10k_iov_configure,
2384 .err_handler = &fm10k_err_handler
2385};
2386
2387/**
2388 * fm10k_register_pci_driver - register driver interface
2389 *
2390 * This function is called on module load in order to register the driver.
2391 **/
2392int fm10k_register_pci_driver(void)
2393{
2394 return pci_register_driver(&fm10k_driver);
2395}
2396
2397/**
2398 * fm10k_unregister_pci_driver - unregister driver interface
2399 *
2400 * This function is called on module unload in order to remove the driver.
2401 **/
2402void fm10k_unregister_pci_driver(void)
2403{
2404 pci_unregister_driver(&fm10k_driver);
2405}