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arm/xen: fix SMP guests boot
[deliverable/linux.git] / drivers / net / ethernet / intel / fm10k / fm10k_pci.c
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
26 static 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 */
40 static const struct pci_device_id fm10k_pci_tbl[] = {
41 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
42 { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
43 /* required last entry */
44 { 0, }
45 };
46 MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
47
48 u16 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
63 u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
64 {
65 u32 __iomem *hw_addr = ACCESS_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
84 static 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
93 void 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
100 static 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 **/
113 static 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
123 static 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
152 static 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
182 static 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;
247 err_open:
248 fm10k_mbx_free_irq(interface);
249 err_mbx_irq:
250 fm10k_clear_queueing_scheme(interface);
251 reinit_err:
252 netif_device_detach(netdev);
253
254 rtnl_unlock();
255
256 clear_bit(__FM10K_RESETTING, &interface->state);
257
258 return err;
259 }
260
261 static 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
273 static 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 **/
291 static 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 **/
314 static 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 **/
350 static 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 **/
363 static 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 **/
381 static 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 **/
399 void 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 **/
502 static 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 **/
532 static 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 */
561 static 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 **/
595 static 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 **/
621 static 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 **/
683 static 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 **/
711 static 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 **/
731 static 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 = FM10K_RXQCTL_ENABLE | FM10K_RXQCTL_PF;
738 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
739 u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
740 u32 rxint = FM10K_INT_MAP_DISABLE;
741 u8 rx_pause = interface->rx_pause;
742 u8 reg_idx = ring->reg_idx;
743
744 /* disable queue to avoid issues while updating state */
745 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), 0);
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 fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
801
802 /* place buffers on ring for receive data */
803 fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
804 }
805
806 /**
807 * fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
808 * @interface: board private structure
809 *
810 * Configure the drop enable bits for the Rx rings.
811 **/
812 void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
813 {
814 struct fm10k_hw *hw = &interface->hw;
815 u8 rx_pause = interface->rx_pause;
816 int i;
817
818 #ifdef CONFIG_DCB
819 if (interface->pfc_en)
820 rx_pause = interface->pfc_en;
821
822 #endif
823 for (i = 0; i < interface->num_rx_queues; i++) {
824 struct fm10k_ring *ring = interface->rx_ring[i];
825 u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
826 u8 reg_idx = ring->reg_idx;
827
828 if (!(rx_pause & BIT(ring->qos_pc)))
829 rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
830
831 fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
832 }
833 }
834
835 /**
836 * fm10k_configure_dglort - Configure Receive DGLORT after reset
837 * @interface: board private structure
838 *
839 * Configure the DGLORT description and RSS tables.
840 **/
841 static void fm10k_configure_dglort(struct fm10k_intfc *interface)
842 {
843 struct fm10k_dglort_cfg dglort = { 0 };
844 struct fm10k_hw *hw = &interface->hw;
845 int i;
846 u32 mrqc;
847
848 /* Fill out hash function seeds */
849 for (i = 0; i < FM10K_RSSRK_SIZE; i++)
850 fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
851
852 /* Write RETA table to hardware */
853 for (i = 0; i < FM10K_RETA_SIZE; i++)
854 fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
855
856 /* Generate RSS hash based on packet types, TCP/UDP
857 * port numbers and/or IPv4/v6 src and dst addresses
858 */
859 mrqc = FM10K_MRQC_IPV4 |
860 FM10K_MRQC_TCP_IPV4 |
861 FM10K_MRQC_IPV6 |
862 FM10K_MRQC_TCP_IPV6;
863
864 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV4_UDP)
865 mrqc |= FM10K_MRQC_UDP_IPV4;
866 if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV6_UDP)
867 mrqc |= FM10K_MRQC_UDP_IPV6;
868
869 fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
870
871 /* configure default DGLORT mapping for RSS/DCB */
872 dglort.inner_rss = 1;
873 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
874 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
875 hw->mac.ops.configure_dglort_map(hw, &dglort);
876
877 /* assign GLORT per queue for queue mapped testing */
878 if (interface->glort_count > 64) {
879 memset(&dglort, 0, sizeof(dglort));
880 dglort.inner_rss = 1;
881 dglort.glort = interface->glort + 64;
882 dglort.idx = fm10k_dglort_pf_queue;
883 dglort.queue_l = fls(interface->num_rx_queues - 1);
884 hw->mac.ops.configure_dglort_map(hw, &dglort);
885 }
886
887 /* assign glort value for RSS/DCB specific to this interface */
888 memset(&dglort, 0, sizeof(dglort));
889 dglort.inner_rss = 1;
890 dglort.glort = interface->glort;
891 dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
892 dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
893 /* configure DGLORT mapping for RSS/DCB */
894 dglort.idx = fm10k_dglort_pf_rss;
895 if (interface->l2_accel)
896 dglort.shared_l = fls(interface->l2_accel->size);
897 hw->mac.ops.configure_dglort_map(hw, &dglort);
898 }
899
900 /**
901 * fm10k_configure_rx - Configure Receive Unit after Reset
902 * @interface: board private structure
903 *
904 * Configure the Rx unit of the MAC after a reset.
905 **/
906 static void fm10k_configure_rx(struct fm10k_intfc *interface)
907 {
908 int i;
909
910 /* Configure SWPRI to PC map */
911 fm10k_configure_swpri_map(interface);
912
913 /* Configure RSS and DGLORT map */
914 fm10k_configure_dglort(interface);
915
916 /* Setup the HW Rx Head and Tail descriptor pointers */
917 for (i = 0; i < interface->num_rx_queues; i++)
918 fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
919
920 /* possible poll here to verify that Rx rings are now enabled */
921 }
922
923 static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
924 {
925 struct fm10k_q_vector *q_vector;
926 int q_idx;
927
928 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
929 q_vector = interface->q_vector[q_idx];
930 napi_enable(&q_vector->napi);
931 }
932 }
933
934 static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
935 {
936 struct fm10k_q_vector *q_vector = data;
937
938 if (q_vector->rx.count || q_vector->tx.count)
939 napi_schedule_irqoff(&q_vector->napi);
940
941 return IRQ_HANDLED;
942 }
943
944 static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
945 {
946 struct fm10k_intfc *interface = data;
947 struct fm10k_hw *hw = &interface->hw;
948 struct fm10k_mbx_info *mbx = &hw->mbx;
949
950 /* re-enable mailbox interrupt and indicate 20us delay */
951 fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
952 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
953 FM10K_ITR_ENABLE);
954
955 /* service upstream mailbox */
956 if (fm10k_mbx_trylock(interface)) {
957 mbx->ops.process(hw, mbx);
958 fm10k_mbx_unlock(interface);
959 }
960
961 hw->mac.get_host_state = true;
962 fm10k_service_event_schedule(interface);
963
964 return IRQ_HANDLED;
965 }
966
967 #ifdef CONFIG_NET_POLL_CONTROLLER
968 /**
969 * fm10k_netpoll - A Polling 'interrupt' handler
970 * @netdev: network interface device structure
971 *
972 * This is used by netconsole to send skbs without having to re-enable
973 * interrupts. It's not called while the normal interrupt routine is executing.
974 **/
975 void fm10k_netpoll(struct net_device *netdev)
976 {
977 struct fm10k_intfc *interface = netdev_priv(netdev);
978 int i;
979
980 /* if interface is down do nothing */
981 if (test_bit(__FM10K_DOWN, &interface->state))
982 return;
983
984 for (i = 0; i < interface->num_q_vectors; i++)
985 fm10k_msix_clean_rings(0, interface->q_vector[i]);
986 }
987
988 #endif
989 #define FM10K_ERR_MSG(type) case (type): error = #type; break
990 static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
991 struct fm10k_fault *fault)
992 {
993 struct pci_dev *pdev = interface->pdev;
994 struct fm10k_hw *hw = &interface->hw;
995 struct fm10k_iov_data *iov_data = interface->iov_data;
996 char *error;
997
998 switch (type) {
999 case FM10K_PCA_FAULT:
1000 switch (fault->type) {
1001 default:
1002 error = "Unknown PCA error";
1003 break;
1004 FM10K_ERR_MSG(PCA_NO_FAULT);
1005 FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
1006 FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
1007 FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
1008 FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
1009 FM10K_ERR_MSG(PCA_POISONED_TLP);
1010 FM10K_ERR_MSG(PCA_TLP_ABORT);
1011 }
1012 break;
1013 case FM10K_THI_FAULT:
1014 switch (fault->type) {
1015 default:
1016 error = "Unknown THI error";
1017 break;
1018 FM10K_ERR_MSG(THI_NO_FAULT);
1019 FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
1020 }
1021 break;
1022 case FM10K_FUM_FAULT:
1023 switch (fault->type) {
1024 default:
1025 error = "Unknown FUM error";
1026 break;
1027 FM10K_ERR_MSG(FUM_NO_FAULT);
1028 FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
1029 FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
1030 FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
1031 FM10K_ERR_MSG(FUM_RO_ERROR);
1032 FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
1033 FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
1034 FM10K_ERR_MSG(FUM_INVALID_TYPE);
1035 FM10K_ERR_MSG(FUM_INVALID_LENGTH);
1036 FM10K_ERR_MSG(FUM_INVALID_BE);
1037 FM10K_ERR_MSG(FUM_INVALID_ALIGN);
1038 }
1039 break;
1040 default:
1041 error = "Undocumented fault";
1042 break;
1043 }
1044
1045 dev_warn(&pdev->dev,
1046 "%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
1047 error, fault->address, fault->specinfo,
1048 PCI_SLOT(fault->func), PCI_FUNC(fault->func));
1049
1050 /* For VF faults, clear out the respective LPORT, reset the queue
1051 * resources, and then reconnect to the mailbox. This allows the
1052 * VF in question to resume behavior. For transient faults that are
1053 * the result of non-malicious behavior this will log the fault and
1054 * allow the VF to resume functionality. Obviously for malicious VFs
1055 * they will be able to attempt malicious behavior again. In this
1056 * case, the system administrator will need to step in and manually
1057 * remove or disable the VF in question.
1058 */
1059 if (fault->func && iov_data) {
1060 int vf = fault->func - 1;
1061 struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
1062
1063 hw->iov.ops.reset_lport(hw, vf_info);
1064 hw->iov.ops.reset_resources(hw, vf_info);
1065
1066 /* reset_lport disables the VF, so re-enable it */
1067 hw->iov.ops.set_lport(hw, vf_info, vf,
1068 FM10K_VF_FLAG_MULTI_CAPABLE);
1069
1070 /* reset_resources will disconnect from the mbx */
1071 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
1072 }
1073 }
1074
1075 static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
1076 {
1077 struct fm10k_hw *hw = &interface->hw;
1078 struct fm10k_fault fault = { 0 };
1079 int type, err;
1080
1081 for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
1082 eicr;
1083 eicr >>= 1, type += FM10K_FAULT_SIZE) {
1084 /* only check if there is an error reported */
1085 if (!(eicr & 0x1))
1086 continue;
1087
1088 /* retrieve fault info */
1089 err = hw->mac.ops.get_fault(hw, type, &fault);
1090 if (err) {
1091 dev_err(&interface->pdev->dev,
1092 "error reading fault\n");
1093 continue;
1094 }
1095
1096 fm10k_handle_fault(interface, type, &fault);
1097 }
1098 }
1099
1100 static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
1101 {
1102 struct fm10k_hw *hw = &interface->hw;
1103 const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
1104 u32 maxholdq;
1105 int q;
1106
1107 if (!(eicr & FM10K_EICR_MAXHOLDTIME))
1108 return;
1109
1110 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
1111 if (maxholdq)
1112 fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
1113 for (q = 255;;) {
1114 if (maxholdq & BIT(31)) {
1115 if (q < FM10K_MAX_QUEUES_PF) {
1116 interface->rx_overrun_pf++;
1117 fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
1118 } else {
1119 interface->rx_overrun_vf++;
1120 }
1121 }
1122
1123 maxholdq *= 2;
1124 if (!maxholdq)
1125 q &= ~(32 - 1);
1126
1127 if (!q)
1128 break;
1129
1130 if (q-- % 32)
1131 continue;
1132
1133 maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
1134 if (maxholdq)
1135 fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
1136 }
1137 }
1138
1139 static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
1140 {
1141 struct fm10k_intfc *interface = data;
1142 struct fm10k_hw *hw = &interface->hw;
1143 struct fm10k_mbx_info *mbx = &hw->mbx;
1144 u32 eicr;
1145
1146 /* unmask any set bits related to this interrupt */
1147 eicr = fm10k_read_reg(hw, FM10K_EICR);
1148 fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
1149 FM10K_EICR_SWITCHREADY |
1150 FM10K_EICR_SWITCHNOTREADY));
1151
1152 /* report any faults found to the message log */
1153 fm10k_report_fault(interface, eicr);
1154
1155 /* reset any queues disabled due to receiver overrun */
1156 fm10k_reset_drop_on_empty(interface, eicr);
1157
1158 /* service mailboxes */
1159 if (fm10k_mbx_trylock(interface)) {
1160 mbx->ops.process(hw, mbx);
1161 /* handle VFLRE events */
1162 fm10k_iov_event(interface);
1163 fm10k_mbx_unlock(interface);
1164 }
1165
1166 /* if switch toggled state we should reset GLORTs */
1167 if (eicr & FM10K_EICR_SWITCHNOTREADY) {
1168 /* force link down for at least 4 seconds */
1169 interface->link_down_event = jiffies + (4 * HZ);
1170 set_bit(__FM10K_LINK_DOWN, &interface->state);
1171
1172 /* reset dglort_map back to no config */
1173 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1174 }
1175
1176 /* we should validate host state after interrupt event */
1177 hw->mac.get_host_state = true;
1178
1179 /* validate host state, and handle VF mailboxes in the service task */
1180 fm10k_service_event_schedule(interface);
1181
1182 /* re-enable mailbox interrupt and indicate 20us delay */
1183 fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
1184 (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
1185 FM10K_ITR_ENABLE);
1186
1187 return IRQ_HANDLED;
1188 }
1189
1190 void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
1191 {
1192 struct fm10k_hw *hw = &interface->hw;
1193 struct msix_entry *entry;
1194 int itr_reg;
1195
1196 /* no mailbox IRQ to free if MSI-X is not enabled */
1197 if (!interface->msix_entries)
1198 return;
1199
1200 entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1201
1202 /* disconnect the mailbox */
1203 hw->mbx.ops.disconnect(hw, &hw->mbx);
1204
1205 /* disable Mailbox cause */
1206 if (hw->mac.type == fm10k_mac_pf) {
1207 fm10k_write_reg(hw, FM10K_EIMR,
1208 FM10K_EIMR_DISABLE(PCA_FAULT) |
1209 FM10K_EIMR_DISABLE(FUM_FAULT) |
1210 FM10K_EIMR_DISABLE(MAILBOX) |
1211 FM10K_EIMR_DISABLE(SWITCHREADY) |
1212 FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
1213 FM10K_EIMR_DISABLE(SRAMERROR) |
1214 FM10K_EIMR_DISABLE(VFLR) |
1215 FM10K_EIMR_DISABLE(MAXHOLDTIME));
1216 itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
1217 } else {
1218 itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
1219 }
1220
1221 fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
1222
1223 free_irq(entry->vector, interface);
1224 }
1225
1226 static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
1227 struct fm10k_mbx_info *mbx)
1228 {
1229 bool vlan_override = hw->mac.vlan_override;
1230 u16 default_vid = hw->mac.default_vid;
1231 struct fm10k_intfc *interface;
1232 s32 err;
1233
1234 err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
1235 if (err)
1236 return err;
1237
1238 interface = container_of(hw, struct fm10k_intfc, hw);
1239
1240 /* MAC was changed so we need reset */
1241 if (is_valid_ether_addr(hw->mac.perm_addr) &&
1242 !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
1243 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1244
1245 /* VLAN override was changed, or default VLAN changed */
1246 if ((vlan_override != hw->mac.vlan_override) ||
1247 (default_vid != hw->mac.default_vid))
1248 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1249
1250 return 0;
1251 }
1252
1253 /* generic error handler for mailbox issues */
1254 static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
1255 struct fm10k_mbx_info __always_unused *mbx)
1256 {
1257 struct fm10k_intfc *interface;
1258 struct pci_dev *pdev;
1259
1260 interface = container_of(hw, struct fm10k_intfc, hw);
1261 pdev = interface->pdev;
1262
1263 dev_err(&pdev->dev, "Unknown message ID %u\n",
1264 **results & FM10K_TLV_ID_MASK);
1265
1266 return 0;
1267 }
1268
1269 static const struct fm10k_msg_data vf_mbx_data[] = {
1270 FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
1271 FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
1272 FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
1273 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1274 };
1275
1276 static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
1277 {
1278 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1279 struct net_device *dev = interface->netdev;
1280 struct fm10k_hw *hw = &interface->hw;
1281 int err;
1282
1283 /* Use timer0 for interrupt moderation on the mailbox */
1284 u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
1285
1286 /* register mailbox handlers */
1287 err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
1288 if (err)
1289 return err;
1290
1291 /* request the IRQ */
1292 err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
1293 dev->name, interface);
1294 if (err) {
1295 netif_err(interface, probe, dev,
1296 "request_irq for msix_mbx failed: %d\n", err);
1297 return err;
1298 }
1299
1300 /* map all of the interrupt sources */
1301 fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
1302
1303 /* enable interrupt */
1304 fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
1305
1306 return 0;
1307 }
1308
1309 static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
1310 struct fm10k_mbx_info *mbx)
1311 {
1312 struct fm10k_intfc *interface;
1313 u32 dglort_map = hw->mac.dglort_map;
1314 s32 err;
1315
1316 interface = container_of(hw, struct fm10k_intfc, hw);
1317
1318 err = fm10k_msg_err_pf(hw, results, mbx);
1319 if (!err && hw->swapi.status) {
1320 /* force link down for a reasonable delay */
1321 interface->link_down_event = jiffies + (2 * HZ);
1322 set_bit(__FM10K_LINK_DOWN, &interface->state);
1323
1324 /* reset dglort_map back to no config */
1325 hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
1326
1327 fm10k_service_event_schedule(interface);
1328
1329 /* prevent overloading kernel message buffer */
1330 if (interface->lport_map_failed)
1331 return 0;
1332
1333 interface->lport_map_failed = true;
1334
1335 if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
1336 dev_warn(&interface->pdev->dev,
1337 "cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
1338 dev_warn(&interface->pdev->dev,
1339 "request logical port map failed: %d\n",
1340 hw->swapi.status);
1341
1342 return 0;
1343 }
1344
1345 err = fm10k_msg_lport_map_pf(hw, results, mbx);
1346 if (err)
1347 return err;
1348
1349 interface->lport_map_failed = false;
1350
1351 /* we need to reset if port count was just updated */
1352 if (dglort_map != hw->mac.dglort_map)
1353 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1354
1355 return 0;
1356 }
1357
1358 static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
1359 struct fm10k_mbx_info __always_unused *mbx)
1360 {
1361 struct fm10k_intfc *interface;
1362 u16 glort, pvid;
1363 u32 pvid_update;
1364 s32 err;
1365
1366 err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
1367 &pvid_update);
1368 if (err)
1369 return err;
1370
1371 /* extract values from the pvid update */
1372 glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
1373 pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
1374
1375 /* if glort is not valid return error */
1376 if (!fm10k_glort_valid_pf(hw, glort))
1377 return FM10K_ERR_PARAM;
1378
1379 /* verify VLAN ID is valid */
1380 if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
1381 return FM10K_ERR_PARAM;
1382
1383 interface = container_of(hw, struct fm10k_intfc, hw);
1384
1385 /* check to see if this belongs to one of the VFs */
1386 err = fm10k_iov_update_pvid(interface, glort, pvid);
1387 if (!err)
1388 return 0;
1389
1390 /* we need to reset if default VLAN was just updated */
1391 if (pvid != hw->mac.default_vid)
1392 interface->flags |= FM10K_FLAG_RESET_REQUESTED;
1393
1394 hw->mac.default_vid = pvid;
1395
1396 return 0;
1397 }
1398
1399 static const struct fm10k_msg_data pf_mbx_data[] = {
1400 FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
1401 FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
1402 FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
1403 FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
1404 FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
1405 FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
1406 FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
1407 };
1408
1409 static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
1410 {
1411 struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
1412 struct net_device *dev = interface->netdev;
1413 struct fm10k_hw *hw = &interface->hw;
1414 int err;
1415
1416 /* Use timer0 for interrupt moderation on the mailbox */
1417 u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
1418 u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
1419
1420 /* register mailbox handlers */
1421 err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
1422 if (err)
1423 return err;
1424
1425 /* request the IRQ */
1426 err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
1427 dev->name, interface);
1428 if (err) {
1429 netif_err(interface, probe, dev,
1430 "request_irq for msix_mbx failed: %d\n", err);
1431 return err;
1432 }
1433
1434 /* Enable interrupts w/ no moderation for "other" interrupts */
1435 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
1436 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
1437 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
1438 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
1439 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
1440
1441 /* Enable interrupts w/ moderation for mailbox */
1442 fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
1443
1444 /* Enable individual interrupt causes */
1445 fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
1446 FM10K_EIMR_ENABLE(FUM_FAULT) |
1447 FM10K_EIMR_ENABLE(MAILBOX) |
1448 FM10K_EIMR_ENABLE(SWITCHREADY) |
1449 FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
1450 FM10K_EIMR_ENABLE(SRAMERROR) |
1451 FM10K_EIMR_ENABLE(VFLR) |
1452 FM10K_EIMR_ENABLE(MAXHOLDTIME));
1453
1454 /* enable interrupt */
1455 fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
1456
1457 return 0;
1458 }
1459
1460 int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
1461 {
1462 struct fm10k_hw *hw = &interface->hw;
1463 int err;
1464
1465 /* enable Mailbox cause */
1466 if (hw->mac.type == fm10k_mac_pf)
1467 err = fm10k_mbx_request_irq_pf(interface);
1468 else
1469 err = fm10k_mbx_request_irq_vf(interface);
1470 if (err)
1471 return err;
1472
1473 /* connect mailbox */
1474 err = hw->mbx.ops.connect(hw, &hw->mbx);
1475
1476 /* if the mailbox failed to connect, then free IRQ */
1477 if (err)
1478 fm10k_mbx_free_irq(interface);
1479
1480 return err;
1481 }
1482
1483 /**
1484 * fm10k_qv_free_irq - release interrupts associated with queue vectors
1485 * @interface: board private structure
1486 *
1487 * Release all interrupts associated with this interface
1488 **/
1489 void fm10k_qv_free_irq(struct fm10k_intfc *interface)
1490 {
1491 int vector = interface->num_q_vectors;
1492 struct fm10k_hw *hw = &interface->hw;
1493 struct msix_entry *entry;
1494
1495 entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
1496
1497 while (vector) {
1498 struct fm10k_q_vector *q_vector;
1499
1500 vector--;
1501 entry--;
1502 q_vector = interface->q_vector[vector];
1503
1504 if (!q_vector->tx.count && !q_vector->rx.count)
1505 continue;
1506
1507 /* clear the affinity_mask in the IRQ descriptor */
1508 irq_set_affinity_hint(entry->vector, NULL);
1509
1510 /* disable interrupts */
1511 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1512
1513 free_irq(entry->vector, q_vector);
1514 }
1515 }
1516
1517 /**
1518 * fm10k_qv_request_irq - initialize interrupts for queue vectors
1519 * @interface: board private structure
1520 *
1521 * Attempts to configure interrupts using the best available
1522 * capabilities of the hardware and kernel.
1523 **/
1524 int fm10k_qv_request_irq(struct fm10k_intfc *interface)
1525 {
1526 struct net_device *dev = interface->netdev;
1527 struct fm10k_hw *hw = &interface->hw;
1528 struct msix_entry *entry;
1529 int ri = 0, ti = 0;
1530 int vector, err;
1531
1532 entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
1533
1534 for (vector = 0; vector < interface->num_q_vectors; vector++) {
1535 struct fm10k_q_vector *q_vector = interface->q_vector[vector];
1536
1537 /* name the vector */
1538 if (q_vector->tx.count && q_vector->rx.count) {
1539 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1540 "%s-TxRx-%d", dev->name, ri++);
1541 ti++;
1542 } else if (q_vector->rx.count) {
1543 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1544 "%s-rx-%d", dev->name, ri++);
1545 } else if (q_vector->tx.count) {
1546 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1547 "%s-tx-%d", dev->name, ti++);
1548 } else {
1549 /* skip this unused q_vector */
1550 continue;
1551 }
1552
1553 /* Assign ITR register to q_vector */
1554 q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
1555 &interface->uc_addr[FM10K_ITR(entry->entry)] :
1556 &interface->uc_addr[FM10K_VFITR(entry->entry)];
1557
1558 /* request the IRQ */
1559 err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
1560 q_vector->name, q_vector);
1561 if (err) {
1562 netif_err(interface, probe, dev,
1563 "request_irq failed for MSIX interrupt Error: %d\n",
1564 err);
1565 goto err_out;
1566 }
1567
1568 /* assign the mask for this irq */
1569 irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
1570
1571 /* Enable q_vector */
1572 writel(FM10K_ITR_ENABLE, q_vector->itr);
1573
1574 entry++;
1575 }
1576
1577 return 0;
1578
1579 err_out:
1580 /* wind through the ring freeing all entries and vectors */
1581 while (vector) {
1582 struct fm10k_q_vector *q_vector;
1583
1584 entry--;
1585 vector--;
1586 q_vector = interface->q_vector[vector];
1587
1588 if (!q_vector->tx.count && !q_vector->rx.count)
1589 continue;
1590
1591 /* clear the affinity_mask in the IRQ descriptor */
1592 irq_set_affinity_hint(entry->vector, NULL);
1593
1594 /* disable interrupts */
1595 writel(FM10K_ITR_MASK_SET, q_vector->itr);
1596
1597 free_irq(entry->vector, q_vector);
1598 }
1599
1600 return err;
1601 }
1602
1603 void fm10k_up(struct fm10k_intfc *interface)
1604 {
1605 struct fm10k_hw *hw = &interface->hw;
1606
1607 /* Enable Tx/Rx DMA */
1608 hw->mac.ops.start_hw(hw);
1609
1610 /* configure Tx descriptor rings */
1611 fm10k_configure_tx(interface);
1612
1613 /* configure Rx descriptor rings */
1614 fm10k_configure_rx(interface);
1615
1616 /* configure interrupts */
1617 hw->mac.ops.update_int_moderator(hw);
1618
1619 /* enable statistics capture again */
1620 clear_bit(__FM10K_UPDATING_STATS, &interface->state);
1621
1622 /* clear down bit to indicate we are ready to go */
1623 clear_bit(__FM10K_DOWN, &interface->state);
1624
1625 /* enable polling cleanups */
1626 fm10k_napi_enable_all(interface);
1627
1628 /* re-establish Rx filters */
1629 fm10k_restore_rx_state(interface);
1630
1631 /* enable transmits */
1632 netif_tx_start_all_queues(interface->netdev);
1633
1634 /* kick off the service timer now */
1635 hw->mac.get_host_state = true;
1636 mod_timer(&interface->service_timer, jiffies);
1637 }
1638
1639 static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
1640 {
1641 struct fm10k_q_vector *q_vector;
1642 int q_idx;
1643
1644 for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
1645 q_vector = interface->q_vector[q_idx];
1646 napi_disable(&q_vector->napi);
1647 }
1648 }
1649
1650 void fm10k_down(struct fm10k_intfc *interface)
1651 {
1652 struct net_device *netdev = interface->netdev;
1653 struct fm10k_hw *hw = &interface->hw;
1654 int err, i = 0, count = 0;
1655
1656 /* signal that we are down to the interrupt handler and service task */
1657 if (test_and_set_bit(__FM10K_DOWN, &interface->state))
1658 return;
1659
1660 /* call carrier off first to avoid false dev_watchdog timeouts */
1661 netif_carrier_off(netdev);
1662
1663 /* disable transmits */
1664 netif_tx_stop_all_queues(netdev);
1665 netif_tx_disable(netdev);
1666
1667 /* reset Rx filters */
1668 fm10k_reset_rx_state(interface);
1669
1670 /* disable polling routines */
1671 fm10k_napi_disable_all(interface);
1672
1673 /* capture stats one last time before stopping interface */
1674 fm10k_update_stats(interface);
1675
1676 /* prevent updating statistics while we're down */
1677 while (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
1678 usleep_range(1000, 2000);
1679
1680 /* skip waiting for TX DMA if we lost PCIe link */
1681 if (FM10K_REMOVED(hw->hw_addr))
1682 goto skip_tx_dma_drain;
1683
1684 /* In some rare circumstances it can take a while for Tx queues to
1685 * quiesce and be fully disabled. Attempt to .stop_hw() first, and
1686 * then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
1687 * until the Tx queues have emptied, or until a number of retries. If
1688 * we fail to clear within the retry loop, we will issue a warning
1689 * indicating that Tx DMA is probably hung. Note this means we call
1690 * .stop_hw() twice but this shouldn't cause any problems.
1691 */
1692 err = hw->mac.ops.stop_hw(hw);
1693 if (err != FM10K_ERR_REQUESTS_PENDING)
1694 goto skip_tx_dma_drain;
1695
1696 #define TX_DMA_DRAIN_RETRIES 25
1697 for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
1698 usleep_range(10000, 20000);
1699
1700 /* start checking at the last ring to have pending Tx */
1701 for (; i < interface->num_tx_queues; i++)
1702 if (fm10k_get_tx_pending(interface->tx_ring[i]))
1703 break;
1704
1705 /* if all the queues are drained, we can break now */
1706 if (i == interface->num_tx_queues)
1707 break;
1708 }
1709
1710 if (count >= TX_DMA_DRAIN_RETRIES)
1711 dev_err(&interface->pdev->dev,
1712 "Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
1713 count);
1714 skip_tx_dma_drain:
1715 /* Disable DMA engine for Tx/Rx */
1716 err = hw->mac.ops.stop_hw(hw);
1717 if (err == FM10K_ERR_REQUESTS_PENDING)
1718 dev_err(&interface->pdev->dev,
1719 "due to pending requests hw was not shut down gracefully\n");
1720 else if (err)
1721 dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
1722
1723 /* free any buffers still on the rings */
1724 fm10k_clean_all_tx_rings(interface);
1725 fm10k_clean_all_rx_rings(interface);
1726 }
1727
1728 /**
1729 * fm10k_sw_init - Initialize general software structures
1730 * @interface: host interface private structure to initialize
1731 *
1732 * fm10k_sw_init initializes the interface private data structure.
1733 * Fields are initialized based on PCI device information and
1734 * OS network device settings (MTU size).
1735 **/
1736 static int fm10k_sw_init(struct fm10k_intfc *interface,
1737 const struct pci_device_id *ent)
1738 {
1739 const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
1740 struct fm10k_hw *hw = &interface->hw;
1741 struct pci_dev *pdev = interface->pdev;
1742 struct net_device *netdev = interface->netdev;
1743 u32 rss_key[FM10K_RSSRK_SIZE];
1744 unsigned int rss;
1745 int err;
1746
1747 /* initialize back pointer */
1748 hw->back = interface;
1749 hw->hw_addr = interface->uc_addr;
1750
1751 /* PCI config space info */
1752 hw->vendor_id = pdev->vendor;
1753 hw->device_id = pdev->device;
1754 hw->revision_id = pdev->revision;
1755 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1756 hw->subsystem_device_id = pdev->subsystem_device;
1757
1758 /* Setup hw api */
1759 memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
1760 hw->mac.type = fi->mac;
1761
1762 /* Setup IOV handlers */
1763 if (fi->iov_ops)
1764 memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
1765
1766 /* Set common capability flags and settings */
1767 rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
1768 interface->ring_feature[RING_F_RSS].limit = rss;
1769 fi->get_invariants(hw);
1770
1771 /* pick up the PCIe bus settings for reporting later */
1772 if (hw->mac.ops.get_bus_info)
1773 hw->mac.ops.get_bus_info(hw);
1774
1775 /* limit the usable DMA range */
1776 if (hw->mac.ops.set_dma_mask)
1777 hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
1778
1779 /* update netdev with DMA restrictions */
1780 if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
1781 netdev->features |= NETIF_F_HIGHDMA;
1782 netdev->vlan_features |= NETIF_F_HIGHDMA;
1783 }
1784
1785 /* delay any future reset requests */
1786 interface->last_reset = jiffies + (10 * HZ);
1787
1788 /* reset and initialize the hardware so it is in a known state */
1789 err = hw->mac.ops.reset_hw(hw);
1790 if (err) {
1791 dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
1792 return err;
1793 }
1794
1795 err = hw->mac.ops.init_hw(hw);
1796 if (err) {
1797 dev_err(&pdev->dev, "init_hw failed: %d\n", err);
1798 return err;
1799 }
1800
1801 /* initialize hardware statistics */
1802 hw->mac.ops.update_hw_stats(hw, &interface->stats);
1803
1804 /* Set upper limit on IOV VFs that can be allocated */
1805 pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
1806
1807 /* Start with random Ethernet address */
1808 eth_random_addr(hw->mac.addr);
1809
1810 /* Initialize MAC address from hardware */
1811 err = hw->mac.ops.read_mac_addr(hw);
1812 if (err) {
1813 dev_warn(&pdev->dev,
1814 "Failed to obtain MAC address defaulting to random\n");
1815 /* tag address assignment as random */
1816 netdev->addr_assign_type |= NET_ADDR_RANDOM;
1817 }
1818
1819 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
1820 ether_addr_copy(netdev->perm_addr, hw->mac.addr);
1821
1822 if (!is_valid_ether_addr(netdev->perm_addr)) {
1823 dev_err(&pdev->dev, "Invalid MAC Address\n");
1824 return -EIO;
1825 }
1826
1827 /* initialize DCBNL interface */
1828 fm10k_dcbnl_set_ops(netdev);
1829
1830 /* set default ring sizes */
1831 interface->tx_ring_count = FM10K_DEFAULT_TXD;
1832 interface->rx_ring_count = FM10K_DEFAULT_RXD;
1833
1834 /* set default interrupt moderation */
1835 interface->tx_itr = FM10K_TX_ITR_DEFAULT;
1836 interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
1837
1838 /* initialize vxlan_port list */
1839 INIT_LIST_HEAD(&interface->vxlan_port);
1840
1841 netdev_rss_key_fill(rss_key, sizeof(rss_key));
1842 memcpy(interface->rssrk, rss_key, sizeof(rss_key));
1843
1844 /* Start off interface as being down */
1845 set_bit(__FM10K_DOWN, &interface->state);
1846 set_bit(__FM10K_UPDATING_STATS, &interface->state);
1847
1848 return 0;
1849 }
1850
1851 static void fm10k_slot_warn(struct fm10k_intfc *interface)
1852 {
1853 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
1854 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
1855 struct fm10k_hw *hw = &interface->hw;
1856 int max_gts = 0, expected_gts = 0;
1857
1858 if (pcie_get_minimum_link(interface->pdev, &speed, &width) ||
1859 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
1860 dev_warn(&interface->pdev->dev,
1861 "Unable to determine PCI Express bandwidth.\n");
1862 return;
1863 }
1864
1865 switch (speed) {
1866 case PCIE_SPEED_2_5GT:
1867 /* 8b/10b encoding reduces max throughput by 20% */
1868 max_gts = 2 * width;
1869 break;
1870 case PCIE_SPEED_5_0GT:
1871 /* 8b/10b encoding reduces max throughput by 20% */
1872 max_gts = 4 * width;
1873 break;
1874 case PCIE_SPEED_8_0GT:
1875 /* 128b/130b encoding has less than 2% impact on throughput */
1876 max_gts = 8 * width;
1877 break;
1878 default:
1879 dev_warn(&interface->pdev->dev,
1880 "Unable to determine PCI Express bandwidth.\n");
1881 return;
1882 }
1883
1884 dev_info(&interface->pdev->dev,
1885 "PCI Express bandwidth of %dGT/s available\n",
1886 max_gts);
1887 dev_info(&interface->pdev->dev,
1888 "(Speed:%s, Width: x%d, Encoding Loss:%s, Payload:%s)\n",
1889 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
1890 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
1891 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
1892 "Unknown"),
1893 hw->bus.width,
1894 (speed == PCIE_SPEED_2_5GT ? "20%" :
1895 speed == PCIE_SPEED_5_0GT ? "20%" :
1896 speed == PCIE_SPEED_8_0GT ? "<2%" :
1897 "Unknown"),
1898 (hw->bus.payload == fm10k_bus_payload_128 ? "128B" :
1899 hw->bus.payload == fm10k_bus_payload_256 ? "256B" :
1900 hw->bus.payload == fm10k_bus_payload_512 ? "512B" :
1901 "Unknown"));
1902
1903 switch (hw->bus_caps.speed) {
1904 case fm10k_bus_speed_2500:
1905 /* 8b/10b encoding reduces max throughput by 20% */
1906 expected_gts = 2 * hw->bus_caps.width;
1907 break;
1908 case fm10k_bus_speed_5000:
1909 /* 8b/10b encoding reduces max throughput by 20% */
1910 expected_gts = 4 * hw->bus_caps.width;
1911 break;
1912 case fm10k_bus_speed_8000:
1913 /* 128b/130b encoding has less than 2% impact on throughput */
1914 expected_gts = 8 * hw->bus_caps.width;
1915 break;
1916 default:
1917 dev_warn(&interface->pdev->dev,
1918 "Unable to determine expected PCI Express bandwidth.\n");
1919 return;
1920 }
1921
1922 if (max_gts >= expected_gts)
1923 return;
1924
1925 dev_warn(&interface->pdev->dev,
1926 "This device requires %dGT/s of bandwidth for optimal performance.\n",
1927 expected_gts);
1928 dev_warn(&interface->pdev->dev,
1929 "A %sslot with x%d lanes is suggested.\n",
1930 (hw->bus_caps.speed == fm10k_bus_speed_2500 ? "2.5GT/s " :
1931 hw->bus_caps.speed == fm10k_bus_speed_5000 ? "5.0GT/s " :
1932 hw->bus_caps.speed == fm10k_bus_speed_8000 ? "8.0GT/s " : ""),
1933 hw->bus_caps.width);
1934 }
1935
1936 /**
1937 * fm10k_probe - Device Initialization Routine
1938 * @pdev: PCI device information struct
1939 * @ent: entry in fm10k_pci_tbl
1940 *
1941 * Returns 0 on success, negative on failure
1942 *
1943 * fm10k_probe initializes an interface identified by a pci_dev structure.
1944 * The OS initialization, configuring of the interface private structure,
1945 * and a hardware reset occur.
1946 **/
1947 static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1948 {
1949 struct net_device *netdev;
1950 struct fm10k_intfc *interface;
1951 int err;
1952
1953 err = pci_enable_device_mem(pdev);
1954 if (err)
1955 return err;
1956
1957 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
1958 if (err)
1959 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1960 if (err) {
1961 dev_err(&pdev->dev,
1962 "DMA configuration failed: %d\n", err);
1963 goto err_dma;
1964 }
1965
1966 err = pci_request_mem_regions(pdev, fm10k_driver_name);
1967 if (err) {
1968 dev_err(&pdev->dev,
1969 "pci_request_selected_regions failed: %d\n", err);
1970 goto err_pci_reg;
1971 }
1972
1973 pci_enable_pcie_error_reporting(pdev);
1974
1975 pci_set_master(pdev);
1976 pci_save_state(pdev);
1977
1978 netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
1979 if (!netdev) {
1980 err = -ENOMEM;
1981 goto err_alloc_netdev;
1982 }
1983
1984 SET_NETDEV_DEV(netdev, &pdev->dev);
1985
1986 interface = netdev_priv(netdev);
1987 pci_set_drvdata(pdev, interface);
1988
1989 interface->netdev = netdev;
1990 interface->pdev = pdev;
1991
1992 interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
1993 FM10K_UC_ADDR_SIZE);
1994 if (!interface->uc_addr) {
1995 err = -EIO;
1996 goto err_ioremap;
1997 }
1998
1999 err = fm10k_sw_init(interface, ent);
2000 if (err)
2001 goto err_sw_init;
2002
2003 /* enable debugfs support */
2004 fm10k_dbg_intfc_init(interface);
2005
2006 err = fm10k_init_queueing_scheme(interface);
2007 if (err)
2008 goto err_sw_init;
2009
2010 /* the mbx interrupt might attempt to schedule the service task, so we
2011 * must ensure it is disabled since we haven't yet requested the timer
2012 * or work item.
2013 */
2014 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2015
2016 err = fm10k_mbx_request_irq(interface);
2017 if (err)
2018 goto err_mbx_interrupt;
2019
2020 /* final check of hardware state before registering the interface */
2021 err = fm10k_hw_ready(interface);
2022 if (err)
2023 goto err_register;
2024
2025 err = register_netdev(netdev);
2026 if (err)
2027 goto err_register;
2028
2029 /* carrier off reporting is important to ethtool even BEFORE open */
2030 netif_carrier_off(netdev);
2031
2032 /* stop all the transmit queues from transmitting until link is up */
2033 netif_tx_stop_all_queues(netdev);
2034
2035 /* Initialize service timer and service task late in order to avoid
2036 * cleanup issues.
2037 */
2038 setup_timer(&interface->service_timer, &fm10k_service_timer,
2039 (unsigned long)interface);
2040 INIT_WORK(&interface->service_task, fm10k_service_task);
2041
2042 /* kick off service timer now, even when interface is down */
2043 mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
2044
2045 /* print warning for non-optimal configurations */
2046 fm10k_slot_warn(interface);
2047
2048 /* report MAC address for logging */
2049 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
2050
2051 /* enable SR-IOV after registering netdev to enforce PF/VF ordering */
2052 fm10k_iov_configure(pdev, 0);
2053
2054 /* clear the service task disable bit to allow service task to start */
2055 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2056
2057 return 0;
2058
2059 err_register:
2060 fm10k_mbx_free_irq(interface);
2061 err_mbx_interrupt:
2062 fm10k_clear_queueing_scheme(interface);
2063 err_sw_init:
2064 if (interface->sw_addr)
2065 iounmap(interface->sw_addr);
2066 iounmap(interface->uc_addr);
2067 err_ioremap:
2068 free_netdev(netdev);
2069 err_alloc_netdev:
2070 pci_release_mem_regions(pdev);
2071 err_pci_reg:
2072 err_dma:
2073 pci_disable_device(pdev);
2074 return err;
2075 }
2076
2077 /**
2078 * fm10k_remove - Device Removal Routine
2079 * @pdev: PCI device information struct
2080 *
2081 * fm10k_remove is called by the PCI subsystem to alert the driver
2082 * that it should release a PCI device. The could be caused by a
2083 * Hot-Plug event, or because the driver is going to be removed from
2084 * memory.
2085 **/
2086 static void fm10k_remove(struct pci_dev *pdev)
2087 {
2088 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2089 struct net_device *netdev = interface->netdev;
2090
2091 del_timer_sync(&interface->service_timer);
2092
2093 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2094 cancel_work_sync(&interface->service_task);
2095
2096 /* free netdev, this may bounce the interrupts due to setup_tc */
2097 if (netdev->reg_state == NETREG_REGISTERED)
2098 unregister_netdev(netdev);
2099
2100 /* release VFs */
2101 fm10k_iov_disable(pdev);
2102
2103 /* disable mailbox interrupt */
2104 fm10k_mbx_free_irq(interface);
2105
2106 /* free interrupts */
2107 fm10k_clear_queueing_scheme(interface);
2108
2109 /* remove any debugfs interfaces */
2110 fm10k_dbg_intfc_exit(interface);
2111
2112 if (interface->sw_addr)
2113 iounmap(interface->sw_addr);
2114 iounmap(interface->uc_addr);
2115
2116 free_netdev(netdev);
2117
2118 pci_release_mem_regions(pdev);
2119
2120 pci_disable_pcie_error_reporting(pdev);
2121
2122 pci_disable_device(pdev);
2123 }
2124
2125 static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
2126 {
2127 /* the watchdog task reads from registers, which might appear like
2128 * a surprise remove if the PCIe device is disabled while we're
2129 * stopped. We stop the watchdog task until after we resume software
2130 * activity.
2131 */
2132 set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2133 cancel_work_sync(&interface->service_task);
2134
2135 fm10k_prepare_for_reset(interface);
2136 }
2137
2138 static int fm10k_handle_resume(struct fm10k_intfc *interface)
2139 {
2140 struct fm10k_hw *hw = &interface->hw;
2141 int err;
2142
2143 /* reset statistics starting values */
2144 hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
2145
2146 err = fm10k_handle_reset(interface);
2147 if (err)
2148 return err;
2149
2150 /* assume host is not ready, to prevent race with watchdog in case we
2151 * actually don't have connection to the switch
2152 */
2153 interface->host_ready = false;
2154 fm10k_watchdog_host_not_ready(interface);
2155
2156 /* force link to stay down for a second to prevent link flutter */
2157 interface->link_down_event = jiffies + (HZ);
2158 set_bit(__FM10K_LINK_DOWN, &interface->state);
2159
2160 /* clear the service task disable bit to allow service task to start */
2161 clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
2162 fm10k_service_event_schedule(interface);
2163
2164 return err;
2165 }
2166
2167 #ifdef CONFIG_PM
2168 /**
2169 * fm10k_resume - Restore device to pre-sleep state
2170 * @pdev: PCI device information struct
2171 *
2172 * fm10k_resume is called after the system has powered back up from a sleep
2173 * state and is ready to resume operation. This function is meant to restore
2174 * the device back to its pre-sleep state.
2175 **/
2176 static int fm10k_resume(struct pci_dev *pdev)
2177 {
2178 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2179 struct net_device *netdev = interface->netdev;
2180 struct fm10k_hw *hw = &interface->hw;
2181 u32 err;
2182
2183 pci_set_power_state(pdev, PCI_D0);
2184 pci_restore_state(pdev);
2185
2186 /* pci_restore_state clears dev->state_saved so call
2187 * pci_save_state to restore it.
2188 */
2189 pci_save_state(pdev);
2190
2191 err = pci_enable_device_mem(pdev);
2192 if (err) {
2193 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2194 return err;
2195 }
2196 pci_set_master(pdev);
2197
2198 pci_wake_from_d3(pdev, false);
2199
2200 /* refresh hw_addr in case it was dropped */
2201 hw->hw_addr = interface->uc_addr;
2202
2203 err = fm10k_handle_resume(interface);
2204 if (err)
2205 return err;
2206
2207 netif_device_attach(netdev);
2208
2209 return 0;
2210 }
2211
2212 /**
2213 * fm10k_suspend - Prepare the device for a system sleep state
2214 * @pdev: PCI device information struct
2215 *
2216 * fm10k_suspend is meant to shutdown the device prior to the system entering
2217 * a sleep state. The fm10k hardware does not support wake on lan so the
2218 * driver simply needs to shut down the device so it is in a low power state.
2219 **/
2220 static int fm10k_suspend(struct pci_dev *pdev,
2221 pm_message_t __always_unused state)
2222 {
2223 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2224 struct net_device *netdev = interface->netdev;
2225 int err = 0;
2226
2227 netif_device_detach(netdev);
2228
2229 fm10k_prepare_suspend(interface);
2230
2231 err = pci_save_state(pdev);
2232 if (err)
2233 return err;
2234
2235 pci_disable_device(pdev);
2236 pci_wake_from_d3(pdev, false);
2237 pci_set_power_state(pdev, PCI_D3hot);
2238
2239 return 0;
2240 }
2241
2242 #endif /* CONFIG_PM */
2243 /**
2244 * fm10k_io_error_detected - called when PCI error is detected
2245 * @pdev: Pointer to PCI device
2246 * @state: The current pci connection state
2247 *
2248 * This function is called after a PCI bus error affecting
2249 * this device has been detected.
2250 */
2251 static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
2252 pci_channel_state_t state)
2253 {
2254 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2255 struct net_device *netdev = interface->netdev;
2256
2257 netif_device_detach(netdev);
2258
2259 if (state == pci_channel_io_perm_failure)
2260 return PCI_ERS_RESULT_DISCONNECT;
2261
2262 fm10k_prepare_suspend(interface);
2263
2264 /* Request a slot reset. */
2265 return PCI_ERS_RESULT_NEED_RESET;
2266 }
2267
2268 /**
2269 * fm10k_io_slot_reset - called after the pci bus has been reset.
2270 * @pdev: Pointer to PCI device
2271 *
2272 * Restart the card from scratch, as if from a cold-boot.
2273 */
2274 static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
2275 {
2276 pci_ers_result_t result;
2277
2278 if (pci_enable_device_mem(pdev)) {
2279 dev_err(&pdev->dev,
2280 "Cannot re-enable PCI device after reset.\n");
2281 result = PCI_ERS_RESULT_DISCONNECT;
2282 } else {
2283 pci_set_master(pdev);
2284 pci_restore_state(pdev);
2285
2286 /* After second error pci->state_saved is false, this
2287 * resets it so EEH doesn't break.
2288 */
2289 pci_save_state(pdev);
2290
2291 pci_wake_from_d3(pdev, false);
2292
2293 result = PCI_ERS_RESULT_RECOVERED;
2294 }
2295
2296 pci_cleanup_aer_uncorrect_error_status(pdev);
2297
2298 return result;
2299 }
2300
2301 /**
2302 * fm10k_io_resume - called when traffic can start flowing again.
2303 * @pdev: Pointer to PCI device
2304 *
2305 * This callback is called when the error recovery driver tells us that
2306 * its OK to resume normal operation.
2307 */
2308 static void fm10k_io_resume(struct pci_dev *pdev)
2309 {
2310 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2311 struct net_device *netdev = interface->netdev;
2312 int err;
2313
2314 err = fm10k_handle_resume(interface);
2315
2316 if (err)
2317 dev_warn(&pdev->dev,
2318 "fm10k_io_resume failed: %d\n", err);
2319 else
2320 netif_device_attach(netdev);
2321 }
2322
2323 /**
2324 * fm10k_io_reset_notify - called when PCI function is reset
2325 * @pdev: Pointer to PCI device
2326 *
2327 * This callback is called when the PCI function is reset such as from
2328 * /sys/class/net/<enpX>/device/reset or similar. When prepare is true, it
2329 * means we should prepare for a function reset. If prepare is false, it means
2330 * the function reset just occurred.
2331 */
2332 static void fm10k_io_reset_notify(struct pci_dev *pdev, bool prepare)
2333 {
2334 struct fm10k_intfc *interface = pci_get_drvdata(pdev);
2335 int err = 0;
2336
2337 if (prepare) {
2338 /* warn incase we have any active VF devices */
2339 if (pci_num_vf(pdev))
2340 dev_warn(&pdev->dev,
2341 "PCIe FLR may cause issues for any active VF devices\n");
2342
2343 fm10k_prepare_suspend(interface);
2344 } else {
2345 err = fm10k_handle_resume(interface);
2346 }
2347
2348 if (err) {
2349 dev_warn(&pdev->dev,
2350 "fm10k_io_reset_notify failed: %d\n", err);
2351 netif_device_detach(interface->netdev);
2352 }
2353 }
2354
2355 static const struct pci_error_handlers fm10k_err_handler = {
2356 .error_detected = fm10k_io_error_detected,
2357 .slot_reset = fm10k_io_slot_reset,
2358 .resume = fm10k_io_resume,
2359 .reset_notify = fm10k_io_reset_notify,
2360 };
2361
2362 static struct pci_driver fm10k_driver = {
2363 .name = fm10k_driver_name,
2364 .id_table = fm10k_pci_tbl,
2365 .probe = fm10k_probe,
2366 .remove = fm10k_remove,
2367 #ifdef CONFIG_PM
2368 .suspend = fm10k_suspend,
2369 .resume = fm10k_resume,
2370 #endif
2371 .sriov_configure = fm10k_iov_configure,
2372 .err_handler = &fm10k_err_handler
2373 };
2374
2375 /**
2376 * fm10k_register_pci_driver - register driver interface
2377 *
2378 * This function is called on module load in order to register the driver.
2379 **/
2380 int fm10k_register_pci_driver(void)
2381 {
2382 return pci_register_driver(&fm10k_driver);
2383 }
2384
2385 /**
2386 * fm10k_unregister_pci_driver - unregister driver interface
2387 *
2388 * This function is called on module unload in order to remove the driver.
2389 **/
2390 void fm10k_unregister_pci_driver(void)
2391 {
2392 pci_unregister_driver(&fm10k_driver);
2393 }
Linux kernel - Deliverables
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