1/*
2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/kernel.h>
34#include <linux/random.h>
35#include <linux/vmalloc.h>
36#include <linux/hardirq.h>
37#include <linux/mlx5/driver.h>
38#include <linux/kern_levels.h>
39#include "mlx5_core.h"
40#include "lib/eq.h"
41#include "lib/mlx5.h"
42#include "lib/events.h"
43#include "lib/pci_vsc.h"
44#include "lib/tout.h"
45#include "diag/fw_tracer.h"
46#include "diag/reporter_vnic.h"
47
48enum {
49 MAX_MISSES = 3,
50};
51
52enum {
53 MLX5_DROP_HEALTH_WORK,
54};
55
56enum {
57 MLX5_SENSOR_NO_ERR = 0,
58 MLX5_SENSOR_PCI_COMM_ERR = 1,
59 MLX5_SENSOR_PCI_ERR = 2,
60 MLX5_SENSOR_NIC_DISABLED = 3,
61 MLX5_SENSOR_NIC_SW_RESET = 4,
62 MLX5_SENSOR_FW_SYND_RFR = 5,
63};
64
65enum {
66 MLX5_SEVERITY_MASK = 0x7,
67 MLX5_SEVERITY_VALID_MASK = 0x8,
68};
69
70u8 mlx5_get_nic_state(struct mlx5_core_dev *dev)
71{
72 return (ioread32be(&dev->iseg->cmdq_addr_l_sz) >> 8) & 7;
73}
74
75void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state)
76{
77 u32 cur_cmdq_addr_l_sz;
78
79 cur_cmdq_addr_l_sz = ioread32be(&dev->iseg->cmdq_addr_l_sz);
80 iowrite32be((cur_cmdq_addr_l_sz & 0xFFFFF000) |
81 state << MLX5_NIC_IFC_OFFSET,
82 &dev->iseg->cmdq_addr_l_sz);
83}
84
85static bool sensor_pci_not_working(struct mlx5_core_dev *dev)
86{
87 struct mlx5_core_health *health = &dev->priv.health;
88 struct health_buffer __iomem *h = health->health;
89
90 /* Offline PCI reads return 0xffffffff */
91 return (ioread32be(&h->fw_ver) == 0xffffffff);
92}
93
94static int mlx5_health_get_rfr(u8 rfr_severity)
95{
96 return rfr_severity >> MLX5_RFR_BIT_OFFSET;
97}
98
99static int mlx5_health_get_crr(u8 rfr_severity)
100{
101 return (rfr_severity >> MLX5_CRR_BIT_OFFSET) & 0x01;
102}
103
104static bool sensor_fw_synd_rfr(struct mlx5_core_dev *dev)
105{
106 struct mlx5_core_health *health = &dev->priv.health;
107 struct health_buffer __iomem *h = health->health;
108 u8 synd = ioread8(&h->synd);
109 u8 rfr;
110
111 rfr = mlx5_health_get_rfr(rfr_severity: ioread8(&h->rfr_severity));
112
113 if (rfr && synd)
114 mlx5_core_dbg(dev, "FW requests reset, synd: %d\n", synd);
115 return rfr && synd;
116}
117
118u32 mlx5_health_check_fatal_sensors(struct mlx5_core_dev *dev)
119{
120 if (sensor_pci_not_working(dev))
121 return MLX5_SENSOR_PCI_COMM_ERR;
122 if (pci_channel_offline(pdev: dev->pdev))
123 return MLX5_SENSOR_PCI_ERR;
124 if (mlx5_get_nic_state(dev) == MLX5_INITIAL_SEG_NIC_INTERFACE_DISABLED)
125 return MLX5_SENSOR_NIC_DISABLED;
126 if (mlx5_get_nic_state(dev) == MLX5_INITIAL_SEG_NIC_INTERFACE_SW_RESET)
127 return MLX5_SENSOR_NIC_SW_RESET;
128 if (sensor_fw_synd_rfr(dev))
129 return MLX5_SENSOR_FW_SYND_RFR;
130
131 return MLX5_SENSOR_NO_ERR;
132}
133
134static int lock_sem_sw_reset(struct mlx5_core_dev *dev, bool lock)
135{
136 enum mlx5_vsc_state state;
137 int ret;
138
139 if (!mlx5_core_is_pf(dev))
140 return -EBUSY;
141
142 /* Try to lock GW access, this stage doesn't return
143 * EBUSY because locked GW does not mean that other PF
144 * already started the reset.
145 */
146 ret = mlx5_vsc_gw_lock(dev);
147 if (ret == -EBUSY)
148 return -EINVAL;
149 if (ret)
150 return ret;
151
152 state = lock ? MLX5_VSC_LOCK : MLX5_VSC_UNLOCK;
153 /* At this stage, if the return status == EBUSY, then we know
154 * for sure that another PF started the reset, so don't allow
155 * another reset.
156 */
157 ret = mlx5_vsc_sem_set_space(dev, space: MLX5_SEMAPHORE_SW_RESET, state);
158 if (ret)
159 mlx5_core_warn(dev, "Failed to lock SW reset semaphore\n");
160
161 /* Unlock GW access */
162 mlx5_vsc_gw_unlock(dev);
163
164 return ret;
165}
166
167static bool reset_fw_if_needed(struct mlx5_core_dev *dev)
168{
169 bool supported = (ioread32be(&dev->iseg->initializing) >>
170 MLX5_FW_RESET_SUPPORTED_OFFSET) & 1;
171 u32 fatal_error;
172
173 if (!supported)
174 return false;
175
176 /* The reset only needs to be issued by one PF. The health buffer is
177 * shared between all functions, and will be cleared during a reset.
178 * Check again to avoid a redundant 2nd reset. If the fatal errors was
179 * PCI related a reset won't help.
180 */
181 fatal_error = mlx5_health_check_fatal_sensors(dev);
182 if (fatal_error == MLX5_SENSOR_PCI_COMM_ERR ||
183 fatal_error == MLX5_SENSOR_NIC_DISABLED ||
184 fatal_error == MLX5_SENSOR_NIC_SW_RESET) {
185 mlx5_core_warn(dev, "Not issuing FW reset. Either it's already done or won't help.");
186 return false;
187 }
188
189 mlx5_core_warn(dev, "Issuing FW Reset\n");
190 /* Write the NIC interface field to initiate the reset, the command
191 * interface address also resides here, don't overwrite it.
192 */
193 mlx5_set_nic_state(dev, state: MLX5_INITIAL_SEG_NIC_INTERFACE_SW_RESET);
194
195 return true;
196}
197
198static void enter_error_state(struct mlx5_core_dev *dev, bool force)
199{
200 if (mlx5_health_check_fatal_sensors(dev) || force) { /* protected state setting */
201 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
202 mlx5_cmd_flush(dev);
203 }
204
205 mlx5_notifier_call_chain(events: dev->priv.events, event: MLX5_DEV_EVENT_SYS_ERROR, data: (void *)1);
206}
207
208void mlx5_enter_error_state(struct mlx5_core_dev *dev, bool force)
209{
210 bool err_detected = false;
211
212 /* Mark the device as fatal in order to abort FW commands */
213 if ((mlx5_health_check_fatal_sensors(dev) || force) &&
214 dev->state == MLX5_DEVICE_STATE_UP) {
215 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
216 err_detected = true;
217 }
218 mutex_lock(&dev->intf_state_mutex);
219 if (!err_detected && dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
220 goto unlock;/* a previous error is still being handled */
221
222 enter_error_state(dev, force);
223unlock:
224 mutex_unlock(lock: &dev->intf_state_mutex);
225}
226
227void mlx5_error_sw_reset(struct mlx5_core_dev *dev)
228{
229 unsigned long end, delay_ms = mlx5_tout_ms(dev, PCI_TOGGLE);
230 int lock = -EBUSY;
231
232 mutex_lock(&dev->intf_state_mutex);
233 if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
234 goto unlock;
235
236 mlx5_core_err(dev, "start\n");
237
238 if (mlx5_health_check_fatal_sensors(dev) == MLX5_SENSOR_FW_SYND_RFR) {
239 /* Get cr-dump and reset FW semaphore */
240 lock = lock_sem_sw_reset(dev, lock: true);
241
242 if (lock == -EBUSY) {
243 delay_ms = mlx5_tout_ms(dev, FULL_CRDUMP);
244 goto recover_from_sw_reset;
245 }
246 /* Execute SW reset */
247 reset_fw_if_needed(dev);
248 }
249
250recover_from_sw_reset:
251 /* Recover from SW reset */
252 end = jiffies + msecs_to_jiffies(m: delay_ms);
253 do {
254 if (mlx5_get_nic_state(dev) == MLX5_INITIAL_SEG_NIC_INTERFACE_DISABLED)
255 break;
256 if (pci_channel_offline(pdev: dev->pdev)) {
257 mlx5_core_err(dev, "PCI channel offline, stop waiting for NIC IFC\n");
258 goto unlock;
259 }
260
261 msleep(msecs: 20);
262 } while (!time_after(jiffies, end));
263
264 if (mlx5_get_nic_state(dev) != MLX5_INITIAL_SEG_NIC_INTERFACE_DISABLED) {
265 dev_err(&dev->pdev->dev, "NIC IFC still %d after %lums.\n",
266 mlx5_get_nic_state(dev), delay_ms);
267 }
268
269 /* Release FW semaphore if you are the lock owner */
270 if (!lock)
271 lock_sem_sw_reset(dev, lock: false);
272
273 mlx5_core_err(dev, "end\n");
274
275unlock:
276 mutex_unlock(lock: &dev->intf_state_mutex);
277}
278
279static void mlx5_handle_bad_state(struct mlx5_core_dev *dev)
280{
281 u8 nic_interface = mlx5_get_nic_state(dev);
282
283 switch (nic_interface) {
284 case MLX5_INITIAL_SEG_NIC_INTERFACE_FULL_DRIVER:
285 mlx5_core_warn(dev, "Expected to see disabled NIC but it is full driver\n");
286 break;
287
288 case MLX5_INITIAL_SEG_NIC_INTERFACE_DISABLED:
289 mlx5_core_warn(dev, "starting teardown\n");
290 break;
291
292 case MLX5_INITIAL_SEG_NIC_INTERFACE_NO_DRAM_NIC:
293 mlx5_core_warn(dev, "Expected to see disabled NIC but it is no dram nic\n");
294 break;
295
296 case MLX5_INITIAL_SEG_NIC_INTERFACE_SW_RESET:
297 /* The IFC mode field is 3 bits, so it will read 0x7 in 2 cases:
298 * 1. PCI has been disabled (ie. PCI-AER, PF driver unloaded
299 * and this is a VF), this is not recoverable by SW reset.
300 * Logging of this is handled elsewhere.
301 * 2. FW reset has been issued by another function, driver can
302 * be reloaded to recover after the mode switches to
303 * MLX5_INITIAL_SEG_NIC_INTERFACE_DISABLED.
304 */
305 if (dev->priv.health.fatal_error != MLX5_SENSOR_PCI_COMM_ERR)
306 mlx5_core_warn(dev, "NIC SW reset in progress\n");
307 break;
308
309 default:
310 mlx5_core_warn(dev, "Expected to see disabled NIC but it is has invalid value %d\n",
311 nic_interface);
312 }
313
314 mlx5_disable_device(dev);
315}
316
317int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev)
318{
319 unsigned long end;
320
321 end = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, FW_RESET));
322 while (sensor_pci_not_working(dev)) {
323 if (time_after(jiffies, end))
324 return -ETIMEDOUT;
325 if (test_bit(MLX5_BREAK_FW_WAIT, &dev->intf_state)) {
326 mlx5_core_warn(dev, "device is being removed, stop waiting for PCI\n");
327 return -ENODEV;
328 }
329 if (pci_channel_offline(pdev: dev->pdev)) {
330 mlx5_core_err(dev, "PCI channel offline, stop waiting for PCI\n");
331 return -EACCES;
332 }
333 msleep(msecs: 100);
334 }
335 return 0;
336}
337
338static int mlx5_health_try_recover(struct mlx5_core_dev *dev)
339{
340 mlx5_core_warn(dev, "handling bad device here\n");
341 mlx5_handle_bad_state(dev);
342 if (mlx5_health_wait_pci_up(dev)) {
343 mlx5_core_err(dev, "health recovery flow aborted, PCI reads still not working\n");
344 return -EIO;
345 }
346 mlx5_core_err(dev, "starting health recovery flow\n");
347 if (mlx5_recover_device(dev) || mlx5_health_check_fatal_sensors(dev)) {
348 mlx5_core_err(dev, "health recovery failed\n");
349 return -EIO;
350 }
351
352 mlx5_core_info(dev, "health recovery succeeded\n");
353 return 0;
354}
355
356static const char *hsynd_str(u8 synd)
357{
358 switch (synd) {
359 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FW_INTERNAL_ERR:
360 return "firmware internal error";
361 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_DEAD_IRISC:
362 return "irisc not responding";
363 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_HW_FATAL_ERR:
364 return "unrecoverable hardware error";
365 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FW_CRC_ERR:
366 return "firmware CRC error";
367 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ICM_FETCH_PCI_ERR:
368 return "ICM fetch PCI error";
369 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ICM_PAGE_ERR:
370 return "HW fatal error\n";
371 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ASYNCHRONOUS_EQ_BUF_OVERRUN:
372 return "async EQ buffer overrun";
373 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_EQ_IN_ERR:
374 return "EQ error";
375 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_EQ_INV:
376 return "Invalid EQ referenced";
377 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_FFSER_ERR:
378 return "FFSER error";
379 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_HIGH_TEMP_ERR:
380 return "High temperature";
381 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_ICM_PCI_POISONED_ERR:
382 return "ICM fetch PCI data poisoned error";
383 case MLX5_INITIAL_SEG_HEALTH_SYNDROME_TRUST_LOCKDOWN_ERR:
384 return "Trust lockdown error";
385 default:
386 return "unrecognized error";
387 }
388}
389
390static const char *mlx5_loglevel_str(int level)
391{
392 switch (level) {
393 case LOGLEVEL_EMERG:
394 return "EMERGENCY";
395 case LOGLEVEL_ALERT:
396 return "ALERT";
397 case LOGLEVEL_CRIT:
398 return "CRITICAL";
399 case LOGLEVEL_ERR:
400 return "ERROR";
401 case LOGLEVEL_WARNING:
402 return "WARNING";
403 case LOGLEVEL_NOTICE:
404 return "NOTICE";
405 case LOGLEVEL_INFO:
406 return "INFO";
407 case LOGLEVEL_DEBUG:
408 return "DEBUG";
409 }
410 return "Unknown log level";
411}
412
413static int mlx5_health_get_severity(u8 rfr_severity)
414{
415 return rfr_severity & MLX5_SEVERITY_VALID_MASK ?
416 rfr_severity & MLX5_SEVERITY_MASK : LOGLEVEL_ERR;
417}
418
419static void print_health_info(struct mlx5_core_dev *dev)
420{
421 struct mlx5_core_health *health = &dev->priv.health;
422 struct health_buffer __iomem *h = health->health;
423 u8 rfr_severity;
424 int severity;
425 int i;
426
427 /* If the syndrome is 0, the device is OK and no need to print buffer */
428 if (!ioread8(&h->synd))
429 return;
430
431 if (ioread32be(&h->fw_ver) == 0xFFFFFFFF) {
432 mlx5_log(dev, LOGLEVEL_ERR, "PCI slot is unavailable\n");
433 return;
434 }
435
436 rfr_severity = ioread8(&h->rfr_severity);
437 severity = mlx5_health_get_severity(rfr_severity);
438 mlx5_log(dev, severity, "Health issue observed, %s, severity(%d) %s:\n",
439 hsynd_str(ioread8(&h->synd)), severity, mlx5_loglevel_str(severity));
440
441 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
442 mlx5_log(dev, severity, "assert_var[%d] 0x%08x\n", i,
443 ioread32be(h->assert_var + i));
444
445 mlx5_log(dev, severity, "assert_exit_ptr 0x%08x\n", ioread32be(&h->assert_exit_ptr));
446 mlx5_log(dev, severity, "assert_callra 0x%08x\n", ioread32be(&h->assert_callra));
447 mlx5_log(dev, severity, "fw_ver %d.%d.%d", fw_rev_maj(dev), fw_rev_min(dev),
448 fw_rev_sub(dev));
449 mlx5_log(dev, severity, "time %u\n", ioread32be(&h->time));
450 mlx5_log(dev, severity, "hw_id 0x%08x\n", ioread32be(&h->hw_id));
451 mlx5_log(dev, severity, "rfr %d\n", mlx5_health_get_rfr(rfr_severity));
452 mlx5_log(dev, severity, "crr %d\n", mlx5_health_get_crr(rfr_severity));
453 mlx5_log(dev, severity, "severity %d (%s)\n", severity, mlx5_loglevel_str(severity));
454 mlx5_log(dev, severity, "irisc_index %d\n", ioread8(&h->irisc_index));
455 mlx5_log(dev, severity, "synd 0x%x: %s\n", ioread8(&h->synd),
456 hsynd_str(ioread8(&h->synd)));
457 mlx5_log(dev, severity, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
458 mlx5_log(dev, severity, "raw fw_ver 0x%08x\n", ioread32be(&h->fw_ver));
459 if (mlx5_health_get_crr(rfr_severity))
460 mlx5_core_warn(dev, "Cold reset is required\n");
461}
462
463static int
464mlx5_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
465 struct devlink_fmsg *fmsg,
466 struct netlink_ext_ack *extack)
467{
468 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
469 struct mlx5_core_health *health = &dev->priv.health;
470 struct health_buffer __iomem *h = health->health;
471 u8 synd = ioread8(&h->synd);
472
473 devlink_fmsg_u8_pair_put(fmsg, name: "Syndrome", value: synd);
474 if (!synd)
475 return 0;
476
477 devlink_fmsg_string_pair_put(fmsg, name: "Description", value: hsynd_str(synd));
478
479 return 0;
480}
481
482struct mlx5_fw_reporter_ctx {
483 u8 err_synd;
484 int miss_counter;
485};
486
487static void
488mlx5_fw_reporter_ctx_pairs_put(struct devlink_fmsg *fmsg,
489 struct mlx5_fw_reporter_ctx *fw_reporter_ctx)
490{
491 devlink_fmsg_u8_pair_put(fmsg, name: "syndrome", value: fw_reporter_ctx->err_synd);
492 devlink_fmsg_u32_pair_put(fmsg, name: "fw_miss_counter", value: fw_reporter_ctx->miss_counter);
493}
494
495static void
496mlx5_fw_reporter_heath_buffer_data_put(struct mlx5_core_dev *dev,
497 struct devlink_fmsg *fmsg)
498{
499 struct mlx5_core_health *health = &dev->priv.health;
500 struct health_buffer __iomem *h = health->health;
501 u8 rfr_severity;
502 int i;
503
504 if (!ioread8(&h->synd))
505 return;
506
507 devlink_fmsg_pair_nest_start(fmsg, name: "health buffer");
508 devlink_fmsg_obj_nest_start(fmsg);
509 devlink_fmsg_arr_pair_nest_start(fmsg, name: "assert_var");
510 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
511 devlink_fmsg_u32_put(fmsg, value: ioread32be(h->assert_var + i));
512 devlink_fmsg_arr_pair_nest_end(fmsg);
513 devlink_fmsg_u32_pair_put(fmsg, name: "assert_exit_ptr",
514 value: ioread32be(&h->assert_exit_ptr));
515 devlink_fmsg_u32_pair_put(fmsg, name: "assert_callra",
516 value: ioread32be(&h->assert_callra));
517 devlink_fmsg_u32_pair_put(fmsg, name: "time", value: ioread32be(&h->time));
518 devlink_fmsg_u32_pair_put(fmsg, name: "hw_id", value: ioread32be(&h->hw_id));
519 rfr_severity = ioread8(&h->rfr_severity);
520 devlink_fmsg_u8_pair_put(fmsg, name: "rfr", value: mlx5_health_get_rfr(rfr_severity));
521 devlink_fmsg_u8_pair_put(fmsg, name: "severity", value: mlx5_health_get_severity(rfr_severity));
522 devlink_fmsg_u8_pair_put(fmsg, name: "irisc_index", value: ioread8(&h->irisc_index));
523 devlink_fmsg_u8_pair_put(fmsg, name: "synd", value: ioread8(&h->synd));
524 devlink_fmsg_u32_pair_put(fmsg, name: "ext_synd", value: ioread16be(&h->ext_synd));
525 devlink_fmsg_u32_pair_put(fmsg, name: "raw_fw_ver", value: ioread32be(&h->fw_ver));
526 devlink_fmsg_obj_nest_end(fmsg);
527 devlink_fmsg_pair_nest_end(fmsg);
528}
529
530static int
531mlx5_fw_reporter_dump(struct devlink_health_reporter *reporter,
532 struct devlink_fmsg *fmsg, void *priv_ctx,
533 struct netlink_ext_ack *extack)
534{
535 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
536 int err;
537
538 err = mlx5_fw_tracer_trigger_core_dump_general(dev);
539 if (err)
540 return err;
541
542 if (priv_ctx) {
543 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
544
545 mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
546 }
547
548 mlx5_fw_reporter_heath_buffer_data_put(dev, fmsg);
549
550 return mlx5_fw_tracer_get_saved_traces_objects(tracer: dev->tracer, fmsg);
551}
552
553static void mlx5_fw_reporter_err_work(struct work_struct *work)
554{
555 struct mlx5_fw_reporter_ctx fw_reporter_ctx;
556 struct mlx5_core_health *health;
557
558 health = container_of(work, struct mlx5_core_health, report_work);
559
560 if (IS_ERR_OR_NULL(ptr: health->fw_reporter))
561 return;
562
563 fw_reporter_ctx.err_synd = health->synd;
564 fw_reporter_ctx.miss_counter = health->miss_counter;
565 if (fw_reporter_ctx.err_synd) {
566 devlink_health_report(reporter: health->fw_reporter,
567 msg: "FW syndrome reported", priv_ctx: &fw_reporter_ctx);
568 return;
569 }
570 if (fw_reporter_ctx.miss_counter)
571 devlink_health_report(reporter: health->fw_reporter,
572 msg: "FW miss counter reported",
573 priv_ctx: &fw_reporter_ctx);
574}
575
576static const struct devlink_health_reporter_ops mlx5_fw_reporter_pf_ops = {
577 .name = "fw",
578 .diagnose = mlx5_fw_reporter_diagnose,
579 .dump = mlx5_fw_reporter_dump,
580};
581
582static const struct devlink_health_reporter_ops mlx5_fw_reporter_ops = {
583 .name = "fw",
584 .diagnose = mlx5_fw_reporter_diagnose,
585};
586
587static int
588mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter,
589 void *priv_ctx,
590 struct netlink_ext_ack *extack)
591{
592 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
593
594 return mlx5_health_try_recover(dev);
595}
596
597static int
598mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter,
599 struct devlink_fmsg *fmsg, void *priv_ctx,
600 struct netlink_ext_ack *extack)
601{
602 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter);
603 u32 crdump_size = dev->priv.health.crdump_size;
604 u32 *cr_data;
605 int err;
606
607 if (!mlx5_core_is_pf(dev))
608 return -EPERM;
609
610 cr_data = kvmalloc(crdump_size, GFP_KERNEL);
611 if (!cr_data)
612 return -ENOMEM;
613 err = mlx5_crdump_collect(dev, cr_data);
614 if (err)
615 goto free_data;
616
617 if (priv_ctx) {
618 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx;
619
620 mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx);
621 }
622
623 devlink_fmsg_binary_pair_put(fmsg, name: "crdump_data", value: cr_data, value_len: crdump_size);
624
625free_data:
626 kvfree(addr: cr_data);
627 return err;
628}
629
630static void mlx5_fw_fatal_reporter_err_work(struct work_struct *work)
631{
632 struct mlx5_fw_reporter_ctx fw_reporter_ctx;
633 struct mlx5_core_health *health;
634 struct mlx5_core_dev *dev;
635 struct devlink *devlink;
636 struct mlx5_priv *priv;
637
638 health = container_of(work, struct mlx5_core_health, fatal_report_work);
639 priv = container_of(health, struct mlx5_priv, health);
640 dev = container_of(priv, struct mlx5_core_dev, priv);
641 devlink = priv_to_devlink(priv: dev);
642
643 mutex_lock(&dev->intf_state_mutex);
644 if (test_bit(MLX5_DROP_HEALTH_WORK, &health->flags)) {
645 mlx5_core_err(dev, "health works are not permitted at this stage\n");
646 mutex_unlock(lock: &dev->intf_state_mutex);
647 return;
648 }
649 mutex_unlock(lock: &dev->intf_state_mutex);
650 enter_error_state(dev, force: false);
651 if (IS_ERR_OR_NULL(ptr: health->fw_fatal_reporter)) {
652 devl_lock(devlink);
653 if (mlx5_health_try_recover(dev))
654 mlx5_core_err(dev, "health recovery failed\n");
655 devl_unlock(devlink);
656 return;
657 }
658 fw_reporter_ctx.err_synd = health->synd;
659 fw_reporter_ctx.miss_counter = health->miss_counter;
660 if (devlink_health_report(reporter: health->fw_fatal_reporter,
661 msg: "FW fatal error reported", priv_ctx: &fw_reporter_ctx) == -ECANCELED) {
662 /* If recovery wasn't performed, due to grace period,
663 * unload the driver. This ensures that the driver
664 * closes all its resources and it is not subjected to
665 * requests from the kernel.
666 */
667 mlx5_core_err(dev, "Driver is in error state. Unloading\n");
668 mlx5_unload_one(dev, suspend: false);
669 }
670}
671
672#define MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD 180000
673#define MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD 60000
674#define MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD 30000
675#define MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD \
676 MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD
677
678static
679const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ecpf_ops = {
680 .name = "fw_fatal",
681 .recover = mlx5_fw_fatal_reporter_recover,
682 .dump = mlx5_fw_fatal_reporter_dump,
683 .default_graceful_period =
684 MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD,
685};
686
687static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_pf_ops = {
688 .name = "fw_fatal",
689 .recover = mlx5_fw_fatal_reporter_recover,
690 .dump = mlx5_fw_fatal_reporter_dump,
691 .default_graceful_period = MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD,
692};
693
694static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ops = {
695 .name = "fw_fatal",
696 .recover = mlx5_fw_fatal_reporter_recover,
697 .default_graceful_period =
698 MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD,
699};
700
701void mlx5_fw_reporters_create(struct mlx5_core_dev *dev)
702{
703 const struct devlink_health_reporter_ops *fw_fatal_ops;
704 struct mlx5_core_health *health = &dev->priv.health;
705 const struct devlink_health_reporter_ops *fw_ops;
706 struct devlink *devlink = priv_to_devlink(priv: dev);
707
708 fw_ops = &mlx5_fw_reporter_pf_ops;
709 if (mlx5_core_is_ecpf(dev)) {
710 fw_fatal_ops = &mlx5_fw_fatal_reporter_ecpf_ops;
711 } else if (mlx5_core_is_pf(dev)) {
712 fw_fatal_ops = &mlx5_fw_fatal_reporter_pf_ops;
713 } else {
714 /* VF or SF */
715 fw_fatal_ops = &mlx5_fw_fatal_reporter_ops;
716 fw_ops = &mlx5_fw_reporter_ops;
717 }
718
719 health->fw_reporter = devl_health_reporter_create(devlink, ops: fw_ops, priv: dev);
720 if (IS_ERR(ptr: health->fw_reporter))
721 mlx5_core_warn(dev, "Failed to create fw reporter, err = %pe\n",
722 health->fw_reporter);
723
724 health->fw_fatal_reporter = devl_health_reporter_create(devlink,
725 ops: fw_fatal_ops,
726 priv: dev);
727 if (IS_ERR(ptr: health->fw_fatal_reporter))
728 mlx5_core_warn(dev, "Failed to create fw fatal reporter, err = %pe\n",
729 health->fw_fatal_reporter);
730}
731
732static void mlx5_fw_reporters_destroy(struct mlx5_core_dev *dev)
733{
734 struct mlx5_core_health *health = &dev->priv.health;
735
736 if (!IS_ERR_OR_NULL(ptr: health->fw_reporter))
737 devlink_health_reporter_destroy(reporter: health->fw_reporter);
738
739 if (!IS_ERR_OR_NULL(ptr: health->fw_fatal_reporter))
740 devlink_health_reporter_destroy(reporter: health->fw_fatal_reporter);
741}
742
743static unsigned long get_next_poll_jiffies(struct mlx5_core_dev *dev)
744{
745 unsigned long next;
746
747 get_random_bytes(buf: &next, len: sizeof(next));
748 next %= HZ;
749 next += jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL));
750
751 return next;
752}
753
754void mlx5_trigger_health_work(struct mlx5_core_dev *dev)
755{
756 struct mlx5_core_health *health = &dev->priv.health;
757
758 if (!mlx5_dev_is_lightweight(dev))
759 queue_work(wq: health->wq, work: &health->fatal_report_work);
760}
761
762#define MLX5_MSEC_PER_HOUR (MSEC_PER_SEC * 60 * 60)
763static void mlx5_health_log_ts_update(struct work_struct *work)
764{
765 struct delayed_work *dwork = to_delayed_work(work);
766 u32 out[MLX5_ST_SZ_DW(mrtc_reg)] = {};
767 u32 in[MLX5_ST_SZ_DW(mrtc_reg)] = {};
768 struct mlx5_core_health *health;
769 struct mlx5_core_dev *dev;
770 struct mlx5_priv *priv;
771 u64 now_us;
772
773 health = container_of(dwork, struct mlx5_core_health, update_fw_log_ts_work);
774 priv = container_of(health, struct mlx5_priv, health);
775 dev = container_of(priv, struct mlx5_core_dev, priv);
776
777 now_us = ktime_to_us(kt: ktime_get_real());
778
779 MLX5_SET(mrtc_reg, in, time_h, now_us >> 32);
780 MLX5_SET(mrtc_reg, in, time_l, now_us & 0xFFFFFFFF);
781 mlx5_core_access_reg(dev, data_in: in, size_in: sizeof(in), data_out: out, size_out: sizeof(out), reg_num: MLX5_REG_MRTC, arg: 0, write: 1);
782
783 queue_delayed_work(wq: health->wq, dwork: &health->update_fw_log_ts_work,
784 delay: msecs_to_jiffies(MLX5_MSEC_PER_HOUR));
785}
786
787static void poll_health(struct timer_list *t)
788{
789 struct mlx5_core_dev *dev = timer_container_of(dev, t,
790 priv.health.timer);
791 struct mlx5_core_health *health = &dev->priv.health;
792 struct health_buffer __iomem *h = health->health;
793 u32 fatal_error;
794 u8 prev_synd;
795 u32 count;
796
797 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
798 goto out;
799
800 fatal_error = mlx5_health_check_fatal_sensors(dev);
801
802 if (fatal_error && !health->fatal_error) {
803 mlx5_core_err(dev, "Fatal error %u detected\n", fatal_error);
804 dev->priv.health.fatal_error = fatal_error;
805 print_health_info(dev);
806 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR;
807 mlx5_trigger_health_work(dev);
808 return;
809 }
810
811 count = ioread32be(health->health_counter);
812 if (count == health->prev)
813 ++health->miss_counter;
814 else
815 health->miss_counter = 0;
816
817 health->prev = count;
818 if (health->miss_counter == MAX_MISSES) {
819 mlx5_core_err(dev, "device's health compromised - reached miss count\n");
820 health->synd = ioread8(&h->synd);
821 print_health_info(dev);
822 queue_work(wq: health->wq, work: &health->report_work);
823 }
824
825 prev_synd = health->synd;
826 health->synd = ioread8(&h->synd);
827 if (health->synd && health->synd != prev_synd) {
828 print_health_info(dev);
829 queue_work(wq: health->wq, work: &health->report_work);
830 }
831
832out:
833 mod_timer(timer: &health->timer, expires: get_next_poll_jiffies(dev));
834}
835
836void mlx5_start_health_poll(struct mlx5_core_dev *dev)
837{
838 u64 poll_interval_ms = mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL);
839 struct mlx5_core_health *health = &dev->priv.health;
840
841 timer_setup(&health->timer, poll_health, 0);
842 health->fatal_error = MLX5_SENSOR_NO_ERR;
843 clear_bit(nr: MLX5_DROP_HEALTH_WORK, addr: &health->flags);
844 health->health = &dev->iseg->health;
845 health->health_counter = &dev->iseg->health_counter;
846
847 health->timer.expires = jiffies + msecs_to_jiffies(m: poll_interval_ms);
848 add_timer(timer: &health->timer);
849}
850
851void mlx5_stop_health_poll(struct mlx5_core_dev *dev, bool disable_health)
852{
853 struct mlx5_core_health *health = &dev->priv.health;
854
855 if (disable_health)
856 set_bit(nr: MLX5_DROP_HEALTH_WORK, addr: &health->flags);
857
858 timer_delete_sync(timer: &health->timer);
859}
860
861void mlx5_start_health_fw_log_up(struct mlx5_core_dev *dev)
862{
863 struct mlx5_core_health *health = &dev->priv.health;
864
865 if (mlx5_core_is_pf(dev) && MLX5_CAP_MCAM_REG(dev, mrtc))
866 queue_delayed_work(wq: health->wq, dwork: &health->update_fw_log_ts_work, delay: 0);
867}
868
869void mlx5_drain_health_wq(struct mlx5_core_dev *dev)
870{
871 struct mlx5_core_health *health = &dev->priv.health;
872
873 set_bit(nr: MLX5_DROP_HEALTH_WORK, addr: &health->flags);
874 cancel_delayed_work_sync(dwork: &health->update_fw_log_ts_work);
875 cancel_work_sync(work: &health->report_work);
876 cancel_work_sync(work: &health->fatal_report_work);
877}
878
879void mlx5_health_cleanup(struct mlx5_core_dev *dev)
880{
881 struct mlx5_core_health *health = &dev->priv.health;
882
883 cancel_delayed_work_sync(dwork: &health->update_fw_log_ts_work);
884 destroy_workqueue(wq: health->wq);
885 mlx5_reporter_vnic_destroy(dev);
886 mlx5_fw_reporters_destroy(dev);
887}
888
889int mlx5_health_init(struct mlx5_core_dev *dev)
890{
891 struct devlink *devlink = priv_to_devlink(priv: dev);
892 struct mlx5_core_health *health;
893 char *name;
894
895 if (!mlx5_dev_is_lightweight(dev)) {
896 devl_lock(devlink);
897 mlx5_fw_reporters_create(dev);
898 devl_unlock(devlink);
899 }
900 mlx5_reporter_vnic_create(dev);
901
902 health = &dev->priv.health;
903 name = kmalloc(64, GFP_KERNEL);
904 if (!name)
905 goto out_err;
906
907 strcpy(p: name, q: "mlx5_health");
908 strcat(p: name, q: dev_name(dev: dev->device));
909 health->wq = create_singlethread_workqueue(name);
910 kfree(objp: name);
911 if (!health->wq)
912 goto out_err;
913 INIT_WORK(&health->fatal_report_work, mlx5_fw_fatal_reporter_err_work);
914 INIT_WORK(&health->report_work, mlx5_fw_reporter_err_work);
915 INIT_DELAYED_WORK(&health->update_fw_log_ts_work, mlx5_health_log_ts_update);
916
917 return 0;
918
919out_err:
920 mlx5_reporter_vnic_destroy(dev);
921 mlx5_fw_reporters_destroy(dev);
922 return -ENOMEM;
923}
924

source code of linux/drivers/net/ethernet/mellanox/mlx5/core/health.c