Commit | Line | Data |
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86641094 | 1 | /* Intel(R) Ethernet Switch Host Interface Driver |
9de6a1a6 | 2 | * Copyright(c) 2013 - 2016 Intel Corporation. |
b3890e30 AD |
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> | |
19ae1b3f | 22 | #include <linux/aer.h> |
b3890e30 AD |
23 | |
24 | #include "fm10k.h" | |
25 | ||
0e7b3644 AD |
26 | static const struct fm10k_info *fm10k_info_tbl[] = { |
27 | [fm10k_device_pf] = &fm10k_pf_info, | |
5cb8db4a | 28 | [fm10k_device_vf] = &fm10k_vf_info, |
0e7b3644 AD |
29 | }; |
30 | ||
b3890e30 AD |
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[] = { | |
0e7b3644 | 41 | { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf }, |
5cb8db4a | 42 | { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf }, |
b3890e30 AD |
43 | /* required last entry */ |
44 | { 0, } | |
45 | }; | |
46 | MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl); | |
47 | ||
04a5aefb AD |
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]); | |
0e7b3644 AD |
72 | if (!(~value) && (!reg || !(~readl(hw_addr)))) { |
73 | struct fm10k_intfc *interface = hw->back; | |
74 | struct net_device *netdev = interface->netdev; | |
75 | ||
04a5aefb | 76 | hw->hw_addr = NULL; |
0e7b3644 AD |
77 | netif_device_detach(netdev); |
78 | netdev_err(netdev, "PCIe link lost, device now detached\n"); | |
79 | } | |
04a5aefb AD |
80 | |
81 | return value; | |
82 | } | |
83 | ||
0e7b3644 AD |
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 | ||
b7d8514c AD |
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)) | |
b382bb1b | 97 | queue_work(fm10k_workqueue, &interface->service_task); |
b7d8514c AD |
98 | } |
99 | ||
100 | static void fm10k_service_event_complete(struct fm10k_intfc *interface) | |
101 | { | |
838e6102 | 102 | WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, &interface->state)); |
b7d8514c AD |
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; | |
9d7dbf06 JK |
126 | u32 __iomem *hw_addr; |
127 | u32 value; | |
b7d8514c AD |
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 | ||
9d7dbf06 JK |
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 | ||
b7d8514c AD |
144 | rtnl_lock(); |
145 | ||
146 | if (netif_running(netdev)) | |
147 | dev_close(netdev); | |
148 | ||
149 | rtnl_unlock(); | |
150 | } | |
151 | ||
40de1fad | 152 | static void fm10k_prepare_for_reset(struct fm10k_intfc *interface) |
b7d8514c AD |
153 | { |
154 | struct net_device *netdev = interface->netdev; | |
b7d8514c AD |
155 | |
156 | WARN_ON(in_interrupt()); | |
157 | ||
158 | /* put off any impending NetWatchDogTimeout */ | |
860e9538 | 159 | netif_trans_update(netdev); |
b7d8514c AD |
160 | |
161 | while (test_and_set_bit(__FM10K_RESETTING, &interface->state)) | |
162 | usleep_range(1000, 2000); | |
163 | ||
164 | rtnl_lock(); | |
165 | ||
883a9ccb AD |
166 | fm10k_iov_suspend(interface->pdev); |
167 | ||
b7d8514c AD |
168 | if (netif_running(netdev)) |
169 | fm10k_close(netdev); | |
170 | ||
171 | fm10k_mbx_free_irq(interface); | |
172 | ||
875328e4 JK |
173 | /* free interrupts */ |
174 | fm10k_clear_queueing_scheme(interface); | |
175 | ||
b7d8514c AD |
176 | /* delay any future reset requests */ |
177 | interface->last_reset = jiffies + (10 * HZ); | |
178 | ||
40de1fad JK |
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 | ||
0d63a8f5 JK |
190 | pci_set_master(interface->pdev); |
191 | ||
b7d8514c | 192 | /* reset and initialize the hardware so it is in a known state */ |
1343c65f JK |
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) { | |
b7d8514c | 201 | dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err); |
1343c65f JK |
202 | goto reinit_err; |
203 | } | |
b7d8514c | 204 | |
875328e4 JK |
205 | err = fm10k_init_queueing_scheme(interface); |
206 | if (err) { | |
3d02b3df BA |
207 | dev_err(&interface->pdev->dev, |
208 | "init_queueing_scheme failed: %d\n", err); | |
875328e4 JK |
209 | goto reinit_err; |
210 | } | |
211 | ||
40de1fad | 212 | /* re-associate interrupts */ |
09f8a82b AD |
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; | |
b7d8514c | 220 | |
bdc7f590 JK |
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 | ||
09f8a82b AD |
236 | err = netif_running(netdev) ? fm10k_open(netdev) : 0; |
237 | if (err) | |
238 | goto err_open; | |
b7d8514c | 239 | |
883a9ccb AD |
240 | fm10k_iov_resume(interface->pdev); |
241 | ||
09f8a82b AD |
242 | rtnl_unlock(); |
243 | ||
244 | clear_bit(__FM10K_RESETTING, &interface->state); | |
245 | ||
40de1fad | 246 | return err; |
09f8a82b AD |
247 | err_open: |
248 | fm10k_mbx_free_irq(interface); | |
249 | err_mbx_irq: | |
250 | fm10k_clear_queueing_scheme(interface); | |
1343c65f | 251 | reinit_err: |
09f8a82b | 252 | netif_device_detach(netdev); |
1343c65f | 253 | |
b7d8514c AD |
254 | rtnl_unlock(); |
255 | ||
256 | clear_bit(__FM10K_RESETTING, &interface->state); | |
40de1fad JK |
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); | |
b7d8514c AD |
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"); | |
b7d8514c AD |
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. | |
b7d8514c AD |
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); | |
883a9ccb AD |
354 | |
355 | /* process downstream mailboxes */ | |
356 | fm10k_iov_mbx(interface); | |
b7d8514c AD |
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; | |
80043f3b JK |
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; | |
b7d8514c AD |
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 | ||
9d73edee JK |
413 | /* ensure only one thread updates stats at a time */ |
414 | if (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state)) | |
415 | return; | |
416 | ||
b7d8514c AD |
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++) { | |
b624714b JK |
422 | struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]); |
423 | ||
424 | if (!tx_ring) | |
425 | continue; | |
b7d8514c AD |
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; | |
80043f3b | 432 | hw_csum_tx_good += tx_ring->tx_stats.csum_good; |
b7d8514c AD |
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; | |
80043f3b JK |
440 | interface->hw_csum_tx_good = hw_csum_tx_good; |
441 | ||
b7d8514c AD |
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++) { | |
b624714b JK |
444 | struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]); |
445 | ||
446 | if (!rx_ring) | |
447 | continue; | |
b7d8514c AD |
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; | |
80043f3b JK |
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; | |
b7d8514c AD |
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; | |
80043f3b JK |
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; | |
b7d8514c AD |
472 | |
473 | hw->mac.ops.update_hw_stats(hw, &interface->stats); | |
474 | ||
c0e61781 | 475 | for (i = 0; i < hw->mac.max_queues; i++) { |
b7d8514c AD |
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 */ | |
97c71e3c | 492 | net_stats->rx_errors = rx_errors; |
b7d8514c | 493 | net_stats->rx_dropped = interface->stats.nodesc_drop.count; |
9d73edee JK |
494 | |
495 | clear_bit(__FM10K_UPDATING_STATS, &interface->state); | |
b7d8514c AD |
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 | ||
8427672a | 601 | /* tasks run even when interface is down */ |
b7d8514c AD |
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 | ||
3abaae42 AD |
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; | |
fcdb0a99 | 628 | u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE; |
3abaae42 AD |
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 | ||
c7bc9523 | 649 | /* reset ntu and ntc to place SW in sync with hardware */ |
3abaae42 AD |
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 | ||
504b0fdf JK |
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 | ||
3abaae42 AD |
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 | ||
c7bc9523 | 762 | /* reset ntu and ntc to place SW in sync with hardware */ |
3abaae42 AD |
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 | ||
eca32047 | 770 | /* Configure the Rx ring to suppress loopback packets */ |
3abaae42 AD |
771 | srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS; |
772 | fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl); | |
773 | ||
774 | /* Enable drop on empty */ | |
9f801abc | 775 | #ifdef CONFIG_DCB |
3abaae42 AD |
776 | if (interface->pfc_en) |
777 | rx_pause = interface->pfc_en; | |
778 | #endif | |
fcdb0a99 | 779 | if (!(rx_pause & BIT(ring->qos_pc))) |
3abaae42 AD |
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 | ||
aa502b4a | 787 | /* if we have an active VLAN, disable default VLAN ID */ |
e71c9318 JK |
788 | if (test_bit(hw->mac.default_vid, interface->active_vlans)) |
789 | ring->vid |= FM10K_VLAN_CLEAR; | |
790 | ||
3abaae42 AD |
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); | |
b101c962 AD |
801 | |
802 | /* place buffers on ring for receive data */ | |
803 | fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring)); | |
3abaae42 AD |
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 | ||
9f801abc | 818 | #ifdef CONFIG_DCB |
3abaae42 AD |
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 | ||
fcdb0a99 | 828 | if (!(rx_pause & BIT(ring->qos_pc))) |
3abaae42 AD |
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; | |
5cd5e2e9 AD |
895 | if (interface->l2_accel) |
896 | dglort.shared_l = fls(interface->l2_accel->size); | |
3abaae42 AD |
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 | ||
18283cad AD |
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 | ||
de445199 | 934 | static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data) |
18283cad AD |
935 | { |
936 | struct fm10k_q_vector *q_vector = data; | |
937 | ||
938 | if (q_vector->rx.count || q_vector->tx.count) | |
de125aae | 939 | napi_schedule_irqoff(&q_vector->napi); |
18283cad AD |
940 | |
941 | return IRQ_HANDLED; | |
942 | } | |
943 | ||
de445199 | 944 | static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data) |
5cb8db4a AD |
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), | |
1aab144c BA |
952 | (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) | |
953 | FM10K_ITR_ENABLE); | |
5cb8db4a AD |
954 | |
955 | /* service upstream mailbox */ | |
956 | if (fm10k_mbx_trylock(interface)) { | |
957 | mbx->ops.process(hw, mbx); | |
958 | fm10k_mbx_unlock(interface); | |
959 | } | |
960 | ||
f355bb51 | 961 | hw->mac.get_host_state = true; |
5cb8db4a AD |
962 | fm10k_service_event_schedule(interface); |
963 | ||
964 | return IRQ_HANDLED; | |
965 | } | |
966 | ||
8b4a98c7 JK |
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 | |
18283cad | 989 | #define FM10K_ERR_MSG(type) case (type): error = #type; break |
95f4f8da | 990 | static void fm10k_handle_fault(struct fm10k_intfc *interface, int type, |
a4fcad65 | 991 | struct fm10k_fault *fault) |
18283cad AD |
992 | { |
993 | struct pci_dev *pdev = interface->pdev; | |
95f4f8da JK |
994 | struct fm10k_hw *hw = &interface->hw; |
995 | struct fm10k_iov_data *iov_data = interface->iov_data; | |
18283cad AD |
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)); | |
95f4f8da JK |
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 | } | |
18283cad AD |
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 | ||
95f4f8da | 1096 | fm10k_handle_fault(interface, type, &fault); |
18283cad AD |
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;;) { | |
fcdb0a99 | 1114 | if (maxholdq & BIT(31)) { |
18283cad AD |
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 | ||
de445199 | 1139 | static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data) |
18283cad AD |
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); | |
9de15bda | 1161 | /* handle VFLRE events */ |
883a9ccb | 1162 | fm10k_iov_event(interface); |
18283cad AD |
1163 | fm10k_mbx_unlock(interface); |
1164 | } | |
1165 | ||
b7d8514c AD |
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 */ | |
f355bb51 | 1177 | hw->mac.get_host_state = true; |
9de15bda JK |
1178 | |
1179 | /* validate host state, and handle VF mailboxes in the service task */ | |
b7d8514c AD |
1180 | fm10k_service_event_schedule(interface); |
1181 | ||
18283cad AD |
1182 | /* re-enable mailbox interrupt and indicate 20us delay */ |
1183 | fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR), | |
1aab144c BA |
1184 | (FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) | |
1185 | FM10K_ITR_ENABLE); | |
18283cad AD |
1186 | |
1187 | return IRQ_HANDLED; | |
1188 | } | |
1189 | ||
1190 | void fm10k_mbx_free_irq(struct fm10k_intfc *interface) | |
1191 | { | |
18283cad | 1192 | struct fm10k_hw *hw = &interface->hw; |
de66c610 | 1193 | struct msix_entry *entry; |
18283cad AD |
1194 | int itr_reg; |
1195 | ||
e00e23bc AD |
1196 | /* no mailbox IRQ to free if MSI-X is not enabled */ |
1197 | if (!interface->msix_entries) | |
1198 | return; | |
1199 | ||
de66c610 JK |
1200 | entry = &interface->msix_entries[FM10K_MBX_VECTOR]; |
1201 | ||
18283cad AD |
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); | |
5cb8db4a AD |
1217 | } else { |
1218 | itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR); | |
18283cad AD |
1219 | } |
1220 | ||
1221 | fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET); | |
1222 | ||
1223 | free_irq(entry->vector, interface); | |
1224 | } | |
1225 | ||
5cb8db4a AD |
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) && | |
6186ddf0 | 1242 | !ether_addr_equal(hw->mac.perm_addr, hw->mac.addr)) |
5cb8db4a AD |
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 | ||
18283cad AD |
1253 | /* generic error handler for mailbox issues */ |
1254 | static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results, | |
de445199 | 1255 | struct fm10k_mbx_info __always_unused *mbx) |
18283cad AD |
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 | ||
5cb8db4a AD |
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 */ | |
1aab144c | 1284 | u32 itr = entry->entry | FM10K_INT_MAP_TIMER0; |
5cb8db4a AD |
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 | ||
18283cad AD |
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 | ||
a7a7783a JK |
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 | ||
18283cad AD |
1345 | err = fm10k_msg_lport_map_pf(hw, results, mbx); |
1346 | if (err) | |
1347 | return err; | |
1348 | ||
a7a7783a | 1349 | interface->lport_map_failed = false; |
18283cad AD |
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, | |
de445199 | 1359 | struct fm10k_mbx_info __always_unused *mbx) |
18283cad AD |
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 | ||
aa502b4a | 1379 | /* verify VLAN ID is valid */ |
18283cad AD |
1380 | if (pvid >= FM10K_VLAN_TABLE_VID_MAX) |
1381 | return FM10K_ERR_PARAM; | |
1382 | ||
1383 | interface = container_of(hw, struct fm10k_intfc, hw); | |
1384 | ||
883a9ccb AD |
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 | ||
18283cad AD |
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 */ | |
1aab144c BA |
1417 | u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0; |
1418 | u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE; | |
18283cad AD |
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 */ | |
40423dd2 JK |
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); | |
18283cad AD |
1440 | |
1441 | /* Enable interrupts w/ moderation for mailbox */ | |
40423dd2 | 1442 | fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr); |
18283cad AD |
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 */ | |
5cb8db4a AD |
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); | |
e00e23bc AD |
1470 | if (err) |
1471 | return err; | |
18283cad AD |
1472 | |
1473 | /* connect mailbox */ | |
e00e23bc AD |
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); | |
18283cad AD |
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 | ||
504b0fdf JK |
1507 | /* clear the affinity_mask in the IRQ descriptor */ |
1508 | irq_set_affinity_hint(entry->vector, NULL); | |
18283cad | 1509 | |
504b0fdf | 1510 | /* disable interrupts */ |
18283cad AD |
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 */ | |
5cb8db4a AD |
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)]; | |
18283cad AD |
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 | ||
504b0fdf JK |
1568 | /* assign the mask for this irq */ |
1569 | irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask); | |
1570 | ||
18283cad AD |
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 | ||
504b0fdf JK |
1591 | /* clear the affinity_mask in the IRQ descriptor */ |
1592 | irq_set_affinity_hint(entry->vector, NULL); | |
18283cad | 1593 | |
504b0fdf | 1594 | /* disable interrupts */ |
18283cad AD |
1595 | writel(FM10K_ITR_MASK_SET, q_vector->itr); |
1596 | ||
1597 | free_irq(entry->vector, q_vector); | |
1598 | } | |
1599 | ||
1600 | return err; | |
1601 | } | |
1602 | ||
504c5eac AD |
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 | ||
3abaae42 AD |
1610 | /* configure Tx descriptor rings */ |
1611 | fm10k_configure_tx(interface); | |
1612 | ||
1613 | /* configure Rx descriptor rings */ | |
1614 | fm10k_configure_rx(interface); | |
1615 | ||
504c5eac AD |
1616 | /* configure interrupts */ |
1617 | hw->mac.ops.update_int_moderator(hw); | |
1618 | ||
9d73edee JK |
1619 | /* enable statistics capture again */ |
1620 | clear_bit(__FM10K_UPDATING_STATS, &interface->state); | |
1621 | ||
504c5eac AD |
1622 | /* clear down bit to indicate we are ready to go */ |
1623 | clear_bit(__FM10K_DOWN, &interface->state); | |
1624 | ||
18283cad AD |
1625 | /* enable polling cleanups */ |
1626 | fm10k_napi_enable_all(interface); | |
1627 | ||
504c5eac AD |
1628 | /* re-establish Rx filters */ |
1629 | fm10k_restore_rx_state(interface); | |
1630 | ||
1631 | /* enable transmits */ | |
1632 | netif_tx_start_all_queues(interface->netdev); | |
b7d8514c | 1633 | |
54b3c9cf | 1634 | /* kick off the service timer now */ |
f355bb51 | 1635 | hw->mac.get_host_state = true; |
b7d8514c | 1636 | mod_timer(&interface->service_timer, jiffies); |
504c5eac AD |
1637 | } |
1638 | ||
18283cad AD |
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 | ||
504c5eac AD |
1650 | void fm10k_down(struct fm10k_intfc *interface) |
1651 | { | |
1652 | struct net_device *netdev = interface->netdev; | |
1653 | struct fm10k_hw *hw = &interface->hw; | |
94877768 | 1654 | int err, i = 0, count = 0; |
504c5eac AD |
1655 | |
1656 | /* signal that we are down to the interrupt handler and service task */ | |
1b00c6c0 JK |
1657 | if (test_and_set_bit(__FM10K_DOWN, &interface->state)) |
1658 | return; | |
504c5eac AD |
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 | ||
18283cad AD |
1670 | /* disable polling routines */ |
1671 | fm10k_napi_disable_all(interface); | |
1672 | ||
b7d8514c AD |
1673 | /* capture stats one last time before stopping interface */ |
1674 | fm10k_update_stats(interface); | |
1675 | ||
9d73edee JK |
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 | ||
94877768 JK |
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: | |
504c5eac | 1715 | /* Disable DMA engine for Tx/Rx */ |
61e0217e | 1716 | err = hw->mac.ops.stop_hw(hw); |
106ca423 | 1717 | if (err == FM10K_ERR_REQUESTS_PENDING) |
94877768 JK |
1718 | dev_err(&interface->pdev->dev, |
1719 | "due to pending requests hw was not shut down gracefully\n"); | |
106ca423 | 1720 | else if (err) |
61e0217e | 1721 | dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err); |
3abaae42 AD |
1722 | |
1723 | /* free any buffers still on the rings */ | |
1724 | fm10k_clean_all_tx_rings(interface); | |
ec6acb80 | 1725 | fm10k_clean_all_rx_rings(interface); |
504c5eac AD |
1726 | } |
1727 | ||
0e7b3644 AD |
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 | { | |
0e7b3644 AD |
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; | |
c41a4fba | 1743 | u32 rss_key[FM10K_RSSRK_SIZE]; |
0e7b3644 AD |
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 | ||
883a9ccb AD |
1762 | /* Setup IOV handlers */ |
1763 | if (fi->iov_ops) | |
1764 | memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops)); | |
1765 | ||
0e7b3644 AD |
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 | ||
b7d8514c AD |
1785 | /* delay any future reset requests */ |
1786 | interface->last_reset = jiffies + (10 * HZ); | |
1787 | ||
0e7b3644 | 1788 | /* reset and initialize the hardware so it is in a known state */ |
1343c65f JK |
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); | |
0e7b3644 AD |
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 | ||
883a9ccb AD |
1804 | /* Set upper limit on IOV VFs that can be allocated */ |
1805 | pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs); | |
1806 | ||
0e7b3644 AD |
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 | ||
11c49f79 BA |
1819 | ether_addr_copy(netdev->dev_addr, hw->mac.addr); |
1820 | ether_addr_copy(netdev->perm_addr, hw->mac.addr); | |
0e7b3644 AD |
1821 | |
1822 | if (!is_valid_ether_addr(netdev->perm_addr)) { | |
1823 | dev_err(&pdev->dev, "Invalid MAC Address\n"); | |
1824 | return -EIO; | |
1825 | } | |
1826 | ||
9f801abc AD |
1827 | /* initialize DCBNL interface */ |
1828 | fm10k_dcbnl_set_ops(netdev); | |
1829 | ||
e27ef599 AD |
1830 | /* set default ring sizes */ |
1831 | interface->tx_ring_count = FM10K_DEFAULT_TXD; | |
1832 | interface->rx_ring_count = FM10K_DEFAULT_RXD; | |
1833 | ||
18283cad | 1834 | /* set default interrupt moderation */ |
436ea956 JK |
1835 | interface->tx_itr = FM10K_TX_ITR_DEFAULT; |
1836 | interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT; | |
18283cad | 1837 | |
0e7b3644 AD |
1838 | /* initialize vxlan_port list */ |
1839 | INIT_LIST_HEAD(&interface->vxlan_port); | |
1840 | ||
c41a4fba ED |
1841 | netdev_rss_key_fill(rss_key, sizeof(rss_key)); |
1842 | memcpy(interface->rssrk, rss_key, sizeof(rss_key)); | |
0e7b3644 AD |
1843 | |
1844 | /* Start off interface as being down */ | |
1845 | set_bit(__FM10K_DOWN, &interface->state); | |
9d73edee | 1846 | set_bit(__FM10K_UPDATING_STATS, &interface->state); |
0e7b3644 AD |
1847 | |
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | static void fm10k_slot_warn(struct fm10k_intfc *interface) | |
1852 | { | |
106c07a4 JK |
1853 | enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN; |
1854 | enum pci_bus_speed speed = PCI_SPEED_UNKNOWN; | |
0e7b3644 | 1855 | struct fm10k_hw *hw = &interface->hw; |
106c07a4 | 1856 | int max_gts = 0, expected_gts = 0; |
0e7b3644 | 1857 | |
106c07a4 JK |
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"); | |
0e7b3644 | 1862 | return; |
106c07a4 JK |
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")); | |
0e7b3644 | 1902 | |
106c07a4 JK |
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 | ||
3d02b3df BA |
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); | |
0e7b3644 AD |
1934 | } |
1935 | ||
b3890e30 AD |
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 | **/ | |
a4fcad65 | 1947 | static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
b3890e30 | 1948 | { |
0e7b3644 AD |
1949 | struct net_device *netdev; |
1950 | struct fm10k_intfc *interface; | |
b3890e30 | 1951 | int err; |
b3890e30 AD |
1952 | |
1953 | err = pci_enable_device_mem(pdev); | |
1954 | if (err) | |
1955 | return err; | |
1956 | ||
c04ae58e JK |
1957 | err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48)); |
1958 | if (err) | |
b3890e30 | 1959 | err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
c04ae58e JK |
1960 | if (err) { |
1961 | dev_err(&pdev->dev, | |
1962 | "DMA configuration failed: %d\n", err); | |
1963 | goto err_dma; | |
b3890e30 AD |
1964 | } |
1965 | ||
56d766d6 | 1966 | err = pci_request_mem_regions(pdev, fm10k_driver_name); |
b3890e30 AD |
1967 | if (err) { |
1968 | dev_err(&pdev->dev, | |
0197cde6 | 1969 | "pci_request_selected_regions failed: %d\n", err); |
b3890e30 AD |
1970 | goto err_pci_reg; |
1971 | } | |
1972 | ||
19ae1b3f AD |
1973 | pci_enable_pcie_error_reporting(pdev); |
1974 | ||
b3890e30 AD |
1975 | pci_set_master(pdev); |
1976 | pci_save_state(pdev); | |
1977 | ||
e0244903 | 1978 | netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]); |
0e7b3644 AD |
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; | |
0e7b3644 AD |
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 | ||
7461fd91 AD |
2003 | /* enable debugfs support */ |
2004 | fm10k_dbg_intfc_init(interface); | |
2005 | ||
18283cad AD |
2006 | err = fm10k_init_queueing_scheme(interface); |
2007 | if (err) | |
2008 | goto err_sw_init; | |
2009 | ||
e72319bb JK |
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 | ||
18283cad AD |
2016 | err = fm10k_mbx_request_irq(interface); |
2017 | if (err) | |
2018 | goto err_mbx_interrupt; | |
2019 | ||
0e7b3644 AD |
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 | ||
e72319bb JK |
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 | ||
0e7b3644 AD |
2045 | /* print warning for non-optimal configurations */ |
2046 | fm10k_slot_warn(interface); | |
2047 | ||
0ff36676 AD |
2048 | /* report MAC address for logging */ |
2049 | dev_info(&pdev->dev, "%pM\n", netdev->dev_addr); | |
2050 | ||
883a9ccb AD |
2051 | /* enable SR-IOV after registering netdev to enforce PF/VF ordering */ |
2052 | fm10k_iov_configure(pdev, 0); | |
2053 | ||
b7d8514c AD |
2054 | /* clear the service task disable bit to allow service task to start */ |
2055 | clear_bit(__FM10K_SERVICE_DISABLE, &interface->state); | |
2056 | ||
b3890e30 AD |
2057 | return 0; |
2058 | ||
0e7b3644 | 2059 | err_register: |
18283cad AD |
2060 | fm10k_mbx_free_irq(interface); |
2061 | err_mbx_interrupt: | |
2062 | fm10k_clear_queueing_scheme(interface); | |
0e7b3644 | 2063 | err_sw_init: |
a211e013 AD |
2064 | if (interface->sw_addr) |
2065 | iounmap(interface->sw_addr); | |
0e7b3644 AD |
2066 | iounmap(interface->uc_addr); |
2067 | err_ioremap: | |
2068 | free_netdev(netdev); | |
2069 | err_alloc_netdev: | |
56d766d6 | 2070 | pci_release_mem_regions(pdev); |
b3890e30 AD |
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 | { | |
0e7b3644 AD |
2088 | struct fm10k_intfc *interface = pci_get_drvdata(pdev); |
2089 | struct net_device *netdev = interface->netdev; | |
2090 | ||
54b3c9cf JK |
2091 | del_timer_sync(&interface->service_timer); |
2092 | ||
b7d8514c AD |
2093 | set_bit(__FM10K_SERVICE_DISABLE, &interface->state); |
2094 | cancel_work_sync(&interface->service_task); | |
2095 | ||
0e7b3644 AD |
2096 | /* free netdev, this may bounce the interrupts due to setup_tc */ |
2097 | if (netdev->reg_state == NETREG_REGISTERED) | |
2098 | unregister_netdev(netdev); | |
2099 | ||
883a9ccb AD |
2100 | /* release VFs */ |
2101 | fm10k_iov_disable(pdev); | |
2102 | ||
18283cad AD |
2103 | /* disable mailbox interrupt */ |
2104 | fm10k_mbx_free_irq(interface); | |
2105 | ||
2106 | /* free interrupts */ | |
2107 | fm10k_clear_queueing_scheme(interface); | |
2108 | ||
7461fd91 AD |
2109 | /* remove any debugfs interfaces */ |
2110 | fm10k_dbg_intfc_exit(interface); | |
2111 | ||
a211e013 AD |
2112 | if (interface->sw_addr) |
2113 | iounmap(interface->sw_addr); | |
0e7b3644 AD |
2114 | iounmap(interface->uc_addr); |
2115 | ||
2116 | free_netdev(netdev); | |
2117 | ||
56d766d6 | 2118 | pci_release_mem_regions(pdev); |
b3890e30 | 2119 | |
19ae1b3f AD |
2120 | pci_disable_pcie_error_reporting(pdev); |
2121 | ||
b3890e30 AD |
2122 | pci_disable_device(pdev); |
2123 | } | |
2124 | ||
dc4b76c0 JK |
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 | ||
0356b23b JK |
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 | ||
dc4b76c0 JK |
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 | ||
19ae1b3f AD |
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 | ||
7756c08b | 2203 | err = fm10k_handle_resume(interface); |
09f8a82b | 2204 | if (err) |
7756c08b | 2205 | return err; |
883a9ccb | 2206 | |
19ae1b3f AD |
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 | **/ | |
de445199 JK |
2220 | static int fm10k_suspend(struct pci_dev *pdev, |
2221 | pm_message_t __always_unused state) | |
19ae1b3f AD |
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 | ||
7756c08b | 2229 | fm10k_prepare_suspend(interface); |
19ae1b3f AD |
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 | ||
820c91aa | 2262 | fm10k_prepare_suspend(interface); |
1e4c32f3 | 2263 | |
19ae1b3f AD |
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 | { | |
19ae1b3f AD |
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 | ||
19ae1b3f AD |
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; | |
820c91aa | 2312 | int err; |
19ae1b3f | 2313 | |
820c91aa | 2314 | err = fm10k_handle_resume(interface); |
19ae1b3f | 2315 | |
820c91aa JK |
2316 | if (err) |
2317 | dev_warn(&pdev->dev, | |
2318 | "fm10k_io_resume failed: %d\n", err); | |
2319 | else | |
19ae1b3f AD |
2320 | netif_device_attach(netdev); |
2321 | } | |
2322 | ||
0593186a JK |
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 | ||
19ae1b3f AD |
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, | |
0593186a | 2359 | .reset_notify = fm10k_io_reset_notify, |
19ae1b3f AD |
2360 | }; |
2361 | ||
b3890e30 AD |
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, | |
19ae1b3f AD |
2367 | #ifdef CONFIG_PM |
2368 | .suspend = fm10k_suspend, | |
2369 | .resume = fm10k_resume, | |
2370 | #endif | |
883a9ccb | 2371 | .sriov_configure = fm10k_iov_configure, |
19ae1b3f | 2372 | .err_handler = &fm10k_err_handler |
b3890e30 AD |
2373 | }; |
2374 | ||
2375 | /** | |
2376 | * fm10k_register_pci_driver - register driver interface | |
2377 | * | |
d8ec92f2 | 2378 | * This function is called on module load in order to register the driver. |
b3890e30 AD |
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 | * | |
d8ec92f2 | 2388 | * This function is called on module unload in order to remove the driver. |
b3890e30 AD |
2389 | **/ |
2390 | void fm10k_unregister_pci_driver(void) | |
2391 | { | |
2392 | pci_unregister_driver(&fm10k_driver); | |
2393 | } |