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/pci_vsc.h" 43 #include "lib/tout.h" 44 #include "diag/fw_tracer.h" 45 46 enum { 47 MAX_MISSES = 3, 48 }; 49 50 enum { 51 MLX5_HEALTH_SYNDR_FW_ERR = 0x1, 52 MLX5_HEALTH_SYNDR_IRISC_ERR = 0x7, 53 MLX5_HEALTH_SYNDR_HW_UNRECOVERABLE_ERR = 0x8, 54 MLX5_HEALTH_SYNDR_CRC_ERR = 0x9, 55 MLX5_HEALTH_SYNDR_FETCH_PCI_ERR = 0xa, 56 MLX5_HEALTH_SYNDR_HW_FTL_ERR = 0xb, 57 MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR = 0xc, 58 MLX5_HEALTH_SYNDR_EQ_ERR = 0xd, 59 MLX5_HEALTH_SYNDR_EQ_INV = 0xe, 60 MLX5_HEALTH_SYNDR_FFSER_ERR = 0xf, 61 MLX5_HEALTH_SYNDR_HIGH_TEMP = 0x10 62 }; 63 64 enum { 65 MLX5_DROP_NEW_HEALTH_WORK, 66 }; 67 68 enum { 69 MLX5_SENSOR_NO_ERR = 0, 70 MLX5_SENSOR_PCI_COMM_ERR = 1, 71 MLX5_SENSOR_PCI_ERR = 2, 72 MLX5_SENSOR_NIC_DISABLED = 3, 73 MLX5_SENSOR_NIC_SW_RESET = 4, 74 MLX5_SENSOR_FW_SYND_RFR = 5, 75 }; 76 77 enum { 78 MLX5_SEVERITY_MASK = 0x7, 79 MLX5_SEVERITY_VALID_MASK = 0x8, 80 }; 81 82 u8 mlx5_get_nic_state(struct mlx5_core_dev *dev) 83 { 84 return (ioread32be(&dev->iseg->cmdq_addr_l_sz) >> 8) & 7; 85 } 86 87 void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state) 88 { 89 u32 cur_cmdq_addr_l_sz; 90 91 cur_cmdq_addr_l_sz = ioread32be(&dev->iseg->cmdq_addr_l_sz); 92 iowrite32be((cur_cmdq_addr_l_sz & 0xFFFFF000) | 93 state << MLX5_NIC_IFC_OFFSET, 94 &dev->iseg->cmdq_addr_l_sz); 95 } 96 97 static bool sensor_pci_not_working(struct mlx5_core_dev *dev) 98 { 99 struct mlx5_core_health *health = &dev->priv.health; 100 struct health_buffer __iomem *h = health->health; 101 102 /* Offline PCI reads return 0xffffffff */ 103 return (ioread32be(&h->fw_ver) == 0xffffffff); 104 } 105 106 static int mlx5_health_get_rfr(u8 rfr_severity) 107 { 108 return rfr_severity >> MLX5_RFR_BIT_OFFSET; 109 } 110 111 static bool sensor_fw_synd_rfr(struct mlx5_core_dev *dev) 112 { 113 struct mlx5_core_health *health = &dev->priv.health; 114 struct health_buffer __iomem *h = health->health; 115 u8 synd = ioread8(&h->synd); 116 u8 rfr; 117 118 rfr = mlx5_health_get_rfr(ioread8(&h->rfr_severity)); 119 120 if (rfr && synd) 121 mlx5_core_dbg(dev, "FW requests reset, synd: %d\n", synd); 122 return rfr && synd; 123 } 124 125 u32 mlx5_health_check_fatal_sensors(struct mlx5_core_dev *dev) 126 { 127 if (sensor_pci_not_working(dev)) 128 return MLX5_SENSOR_PCI_COMM_ERR; 129 if (pci_channel_offline(dev->pdev)) 130 return MLX5_SENSOR_PCI_ERR; 131 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED) 132 return MLX5_SENSOR_NIC_DISABLED; 133 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_SW_RESET) 134 return MLX5_SENSOR_NIC_SW_RESET; 135 if (sensor_fw_synd_rfr(dev)) 136 return MLX5_SENSOR_FW_SYND_RFR; 137 138 return MLX5_SENSOR_NO_ERR; 139 } 140 141 static int lock_sem_sw_reset(struct mlx5_core_dev *dev, bool lock) 142 { 143 enum mlx5_vsc_state state; 144 int ret; 145 146 if (!mlx5_core_is_pf(dev)) 147 return -EBUSY; 148 149 /* Try to lock GW access, this stage doesn't return 150 * EBUSY because locked GW does not mean that other PF 151 * already started the reset. 152 */ 153 ret = mlx5_vsc_gw_lock(dev); 154 if (ret == -EBUSY) 155 return -EINVAL; 156 if (ret) 157 return ret; 158 159 state = lock ? MLX5_VSC_LOCK : MLX5_VSC_UNLOCK; 160 /* At this stage, if the return status == EBUSY, then we know 161 * for sure that another PF started the reset, so don't allow 162 * another reset. 163 */ 164 ret = mlx5_vsc_sem_set_space(dev, MLX5_SEMAPHORE_SW_RESET, state); 165 if (ret) 166 mlx5_core_warn(dev, "Failed to lock SW reset semaphore\n"); 167 168 /* Unlock GW access */ 169 mlx5_vsc_gw_unlock(dev); 170 171 return ret; 172 } 173 174 static bool reset_fw_if_needed(struct mlx5_core_dev *dev) 175 { 176 bool supported = (ioread32be(&dev->iseg->initializing) >> 177 MLX5_FW_RESET_SUPPORTED_OFFSET) & 1; 178 u32 fatal_error; 179 180 if (!supported) 181 return false; 182 183 /* The reset only needs to be issued by one PF. The health buffer is 184 * shared between all functions, and will be cleared during a reset. 185 * Check again to avoid a redundant 2nd reset. If the fatal errors was 186 * PCI related a reset won't help. 187 */ 188 fatal_error = mlx5_health_check_fatal_sensors(dev); 189 if (fatal_error == MLX5_SENSOR_PCI_COMM_ERR || 190 fatal_error == MLX5_SENSOR_NIC_DISABLED || 191 fatal_error == MLX5_SENSOR_NIC_SW_RESET) { 192 mlx5_core_warn(dev, "Not issuing FW reset. Either it's already done or won't help."); 193 return false; 194 } 195 196 mlx5_core_warn(dev, "Issuing FW Reset\n"); 197 /* Write the NIC interface field to initiate the reset, the command 198 * interface address also resides here, don't overwrite it. 199 */ 200 mlx5_set_nic_state(dev, MLX5_NIC_IFC_SW_RESET); 201 202 return true; 203 } 204 205 static void enter_error_state(struct mlx5_core_dev *dev, bool force) 206 { 207 if (mlx5_health_check_fatal_sensors(dev) || force) { /* protected state setting */ 208 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR; 209 mlx5_cmd_flush(dev); 210 } 211 212 mlx5_notifier_call_chain(dev->priv.events, MLX5_DEV_EVENT_SYS_ERROR, (void *)1); 213 } 214 215 void mlx5_enter_error_state(struct mlx5_core_dev *dev, bool force) 216 { 217 bool err_detected = false; 218 219 /* Mark the device as fatal in order to abort FW commands */ 220 if ((mlx5_health_check_fatal_sensors(dev) || force) && 221 dev->state == MLX5_DEVICE_STATE_UP) { 222 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR; 223 err_detected = true; 224 } 225 mutex_lock(&dev->intf_state_mutex); 226 if (!err_detected && dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) 227 goto unlock;/* a previous error is still being handled */ 228 229 enter_error_state(dev, force); 230 unlock: 231 mutex_unlock(&dev->intf_state_mutex); 232 } 233 234 void mlx5_error_sw_reset(struct mlx5_core_dev *dev) 235 { 236 unsigned long end, delay_ms = mlx5_tout_ms(dev, PCI_TOGGLE); 237 int lock = -EBUSY; 238 239 mutex_lock(&dev->intf_state_mutex); 240 if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR) 241 goto unlock; 242 243 mlx5_core_err(dev, "start\n"); 244 245 if (mlx5_health_check_fatal_sensors(dev) == MLX5_SENSOR_FW_SYND_RFR) { 246 /* Get cr-dump and reset FW semaphore */ 247 lock = lock_sem_sw_reset(dev, true); 248 249 if (lock == -EBUSY) { 250 delay_ms = mlx5_tout_ms(dev, FULL_CRDUMP); 251 goto recover_from_sw_reset; 252 } 253 /* Execute SW reset */ 254 reset_fw_if_needed(dev); 255 } 256 257 recover_from_sw_reset: 258 /* Recover from SW reset */ 259 end = jiffies + msecs_to_jiffies(delay_ms); 260 do { 261 if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED) 262 break; 263 264 msleep(20); 265 } while (!time_after(jiffies, end)); 266 267 if (mlx5_get_nic_state(dev) != MLX5_NIC_IFC_DISABLED) { 268 dev_err(&dev->pdev->dev, "NIC IFC still %d after %lums.\n", 269 mlx5_get_nic_state(dev), delay_ms); 270 } 271 272 /* Release FW semaphore if you are the lock owner */ 273 if (!lock) 274 lock_sem_sw_reset(dev, false); 275 276 mlx5_core_err(dev, "end\n"); 277 278 unlock: 279 mutex_unlock(&dev->intf_state_mutex); 280 } 281 282 static void mlx5_handle_bad_state(struct mlx5_core_dev *dev) 283 { 284 u8 nic_interface = mlx5_get_nic_state(dev); 285 286 switch (nic_interface) { 287 case MLX5_NIC_IFC_FULL: 288 mlx5_core_warn(dev, "Expected to see disabled NIC but it is full driver\n"); 289 break; 290 291 case MLX5_NIC_IFC_DISABLED: 292 mlx5_core_warn(dev, "starting teardown\n"); 293 break; 294 295 case MLX5_NIC_IFC_NO_DRAM_NIC: 296 mlx5_core_warn(dev, "Expected to see disabled NIC but it is no dram nic\n"); 297 break; 298 299 case MLX5_NIC_IFC_SW_RESET: 300 /* The IFC mode field is 3 bits, so it will read 0x7 in 2 cases: 301 * 1. PCI has been disabled (ie. PCI-AER, PF driver unloaded 302 * and this is a VF), this is not recoverable by SW reset. 303 * Logging of this is handled elsewhere. 304 * 2. FW reset has been issued by another function, driver can 305 * be reloaded to recover after the mode switches to 306 * MLX5_NIC_IFC_DISABLED. 307 */ 308 if (dev->priv.health.fatal_error != MLX5_SENSOR_PCI_COMM_ERR) 309 mlx5_core_warn(dev, "NIC SW reset in progress\n"); 310 break; 311 312 default: 313 mlx5_core_warn(dev, "Expected to see disabled NIC but it is has invalid value %d\n", 314 nic_interface); 315 } 316 317 mlx5_disable_device(dev); 318 } 319 320 int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev) 321 { 322 unsigned long end; 323 324 end = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, FW_RESET)); 325 while (sensor_pci_not_working(dev)) { 326 if (time_after(jiffies, end)) 327 return -ETIMEDOUT; 328 msleep(100); 329 } 330 return 0; 331 } 332 333 static int mlx5_health_try_recover(struct mlx5_core_dev *dev) 334 { 335 mlx5_core_warn(dev, "handling bad device here\n"); 336 mlx5_handle_bad_state(dev); 337 if (mlx5_health_wait_pci_up(dev)) { 338 mlx5_core_err(dev, "health recovery flow aborted, PCI reads still not working\n"); 339 return -EIO; 340 } 341 mlx5_core_err(dev, "starting health recovery flow\n"); 342 if (mlx5_recover_device(dev) || mlx5_health_check_fatal_sensors(dev)) { 343 mlx5_core_err(dev, "health recovery failed\n"); 344 return -EIO; 345 } 346 347 mlx5_core_info(dev, "health recovery succeeded\n"); 348 return 0; 349 } 350 351 static const char *hsynd_str(u8 synd) 352 { 353 switch (synd) { 354 case MLX5_HEALTH_SYNDR_FW_ERR: 355 return "firmware internal error"; 356 case MLX5_HEALTH_SYNDR_IRISC_ERR: 357 return "irisc not responding"; 358 case MLX5_HEALTH_SYNDR_HW_UNRECOVERABLE_ERR: 359 return "unrecoverable hardware error"; 360 case MLX5_HEALTH_SYNDR_CRC_ERR: 361 return "firmware CRC error"; 362 case MLX5_HEALTH_SYNDR_FETCH_PCI_ERR: 363 return "ICM fetch PCI error"; 364 case MLX5_HEALTH_SYNDR_HW_FTL_ERR: 365 return "HW fatal error\n"; 366 case MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR: 367 return "async EQ buffer overrun"; 368 case MLX5_HEALTH_SYNDR_EQ_ERR: 369 return "EQ error"; 370 case MLX5_HEALTH_SYNDR_EQ_INV: 371 return "Invalid EQ referenced"; 372 case MLX5_HEALTH_SYNDR_FFSER_ERR: 373 return "FFSER error"; 374 case MLX5_HEALTH_SYNDR_HIGH_TEMP: 375 return "High temperature"; 376 default: 377 return "unrecognized error"; 378 } 379 } 380 381 static const char *mlx5_loglevel_str(int level) 382 { 383 switch (level) { 384 case LOGLEVEL_EMERG: 385 return "EMERGENCY"; 386 case LOGLEVEL_ALERT: 387 return "ALERT"; 388 case LOGLEVEL_CRIT: 389 return "CRITICAL"; 390 case LOGLEVEL_ERR: 391 return "ERROR"; 392 case LOGLEVEL_WARNING: 393 return "WARNING"; 394 case LOGLEVEL_NOTICE: 395 return "NOTICE"; 396 case LOGLEVEL_INFO: 397 return "INFO"; 398 case LOGLEVEL_DEBUG: 399 return "DEBUG"; 400 } 401 return "Unknown log level"; 402 } 403 404 static int mlx5_health_get_severity(u8 rfr_severity) 405 { 406 return rfr_severity & MLX5_SEVERITY_VALID_MASK ? 407 rfr_severity & MLX5_SEVERITY_MASK : LOGLEVEL_ERR; 408 } 409 410 static void print_health_info(struct mlx5_core_dev *dev) 411 { 412 struct mlx5_core_health *health = &dev->priv.health; 413 struct health_buffer __iomem *h = health->health; 414 u8 rfr_severity; 415 int severity; 416 int i; 417 418 /* If the syndrome is 0, the device is OK and no need to print buffer */ 419 if (!ioread8(&h->synd)) 420 return; 421 422 if (ioread32be(&h->fw_ver) == 0xFFFFFFFF) { 423 mlx5_log(dev, LOGLEVEL_ERR, "PCI slot is unavailable\n"); 424 return; 425 } 426 427 rfr_severity = ioread8(&h->rfr_severity); 428 severity = mlx5_health_get_severity(rfr_severity); 429 mlx5_log(dev, severity, "Health issue observed, %s, severity(%d) %s:\n", 430 hsynd_str(ioread8(&h->synd)), severity, mlx5_loglevel_str(severity)); 431 432 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++) 433 mlx5_log(dev, severity, "assert_var[%d] 0x%08x\n", i, 434 ioread32be(h->assert_var + i)); 435 436 mlx5_log(dev, severity, "assert_exit_ptr 0x%08x\n", ioread32be(&h->assert_exit_ptr)); 437 mlx5_log(dev, severity, "assert_callra 0x%08x\n", ioread32be(&h->assert_callra)); 438 mlx5_log(dev, severity, "fw_ver %d.%d.%d", fw_rev_maj(dev), fw_rev_min(dev), 439 fw_rev_sub(dev)); 440 mlx5_log(dev, severity, "time %u\n", ioread32be(&h->time)); 441 mlx5_log(dev, severity, "hw_id 0x%08x\n", ioread32be(&h->hw_id)); 442 mlx5_log(dev, severity, "rfr %d\n", mlx5_health_get_rfr(rfr_severity)); 443 mlx5_log(dev, severity, "severity %d (%s)\n", severity, mlx5_loglevel_str(severity)); 444 mlx5_log(dev, severity, "irisc_index %d\n", ioread8(&h->irisc_index)); 445 mlx5_log(dev, severity, "synd 0x%x: %s\n", ioread8(&h->synd), 446 hsynd_str(ioread8(&h->synd))); 447 mlx5_log(dev, severity, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd)); 448 mlx5_log(dev, severity, "raw fw_ver 0x%08x\n", ioread32be(&h->fw_ver)); 449 } 450 451 static int 452 mlx5_fw_reporter_diagnose(struct devlink_health_reporter *reporter, 453 struct devlink_fmsg *fmsg, 454 struct netlink_ext_ack *extack) 455 { 456 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter); 457 struct mlx5_core_health *health = &dev->priv.health; 458 struct health_buffer __iomem *h = health->health; 459 u8 synd; 460 int err; 461 462 synd = ioread8(&h->synd); 463 err = devlink_fmsg_u8_pair_put(fmsg, "Syndrome", synd); 464 if (err || !synd) 465 return err; 466 return devlink_fmsg_string_pair_put(fmsg, "Description", hsynd_str(synd)); 467 } 468 469 struct mlx5_fw_reporter_ctx { 470 u8 err_synd; 471 int miss_counter; 472 }; 473 474 static int 475 mlx5_fw_reporter_ctx_pairs_put(struct devlink_fmsg *fmsg, 476 struct mlx5_fw_reporter_ctx *fw_reporter_ctx) 477 { 478 int err; 479 480 err = devlink_fmsg_u8_pair_put(fmsg, "syndrome", 481 fw_reporter_ctx->err_synd); 482 if (err) 483 return err; 484 err = devlink_fmsg_u32_pair_put(fmsg, "fw_miss_counter", 485 fw_reporter_ctx->miss_counter); 486 if (err) 487 return err; 488 return 0; 489 } 490 491 static int 492 mlx5_fw_reporter_heath_buffer_data_put(struct mlx5_core_dev *dev, 493 struct devlink_fmsg *fmsg) 494 { 495 struct mlx5_core_health *health = &dev->priv.health; 496 struct health_buffer __iomem *h = health->health; 497 u8 rfr_severity; 498 int err; 499 int i; 500 501 if (!ioread8(&h->synd)) 502 return 0; 503 504 err = devlink_fmsg_pair_nest_start(fmsg, "health buffer"); 505 if (err) 506 return err; 507 err = devlink_fmsg_obj_nest_start(fmsg); 508 if (err) 509 return err; 510 err = devlink_fmsg_arr_pair_nest_start(fmsg, "assert_var"); 511 if (err) 512 return err; 513 514 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++) { 515 err = devlink_fmsg_u32_put(fmsg, ioread32be(h->assert_var + i)); 516 if (err) 517 return err; 518 } 519 err = devlink_fmsg_arr_pair_nest_end(fmsg); 520 if (err) 521 return err; 522 err = devlink_fmsg_u32_pair_put(fmsg, "assert_exit_ptr", 523 ioread32be(&h->assert_exit_ptr)); 524 if (err) 525 return err; 526 err = devlink_fmsg_u32_pair_put(fmsg, "assert_callra", 527 ioread32be(&h->assert_callra)); 528 if (err) 529 return err; 530 err = devlink_fmsg_u32_pair_put(fmsg, "time", ioread32be(&h->time)); 531 if (err) 532 return err; 533 err = devlink_fmsg_u32_pair_put(fmsg, "hw_id", ioread32be(&h->hw_id)); 534 if (err) 535 return err; 536 rfr_severity = ioread8(&h->rfr_severity); 537 err = devlink_fmsg_u8_pair_put(fmsg, "rfr", mlx5_health_get_rfr(rfr_severity)); 538 if (err) 539 return err; 540 err = devlink_fmsg_u8_pair_put(fmsg, "severity", mlx5_health_get_severity(rfr_severity)); 541 if (err) 542 return err; 543 err = devlink_fmsg_u8_pair_put(fmsg, "irisc_index", 544 ioread8(&h->irisc_index)); 545 if (err) 546 return err; 547 err = devlink_fmsg_u8_pair_put(fmsg, "synd", ioread8(&h->synd)); 548 if (err) 549 return err; 550 err = devlink_fmsg_u32_pair_put(fmsg, "ext_synd", 551 ioread16be(&h->ext_synd)); 552 if (err) 553 return err; 554 err = devlink_fmsg_u32_pair_put(fmsg, "raw_fw_ver", 555 ioread32be(&h->fw_ver)); 556 if (err) 557 return err; 558 err = devlink_fmsg_obj_nest_end(fmsg); 559 if (err) 560 return err; 561 return devlink_fmsg_pair_nest_end(fmsg); 562 } 563 564 static int 565 mlx5_fw_reporter_dump(struct devlink_health_reporter *reporter, 566 struct devlink_fmsg *fmsg, void *priv_ctx, 567 struct netlink_ext_ack *extack) 568 { 569 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter); 570 int err; 571 572 err = mlx5_fw_tracer_trigger_core_dump_general(dev); 573 if (err) 574 return err; 575 576 if (priv_ctx) { 577 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx; 578 579 err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx); 580 if (err) 581 return err; 582 } 583 584 err = mlx5_fw_reporter_heath_buffer_data_put(dev, fmsg); 585 if (err) 586 return err; 587 return mlx5_fw_tracer_get_saved_traces_objects(dev->tracer, fmsg); 588 } 589 590 static void mlx5_fw_reporter_err_work(struct work_struct *work) 591 { 592 struct mlx5_fw_reporter_ctx fw_reporter_ctx; 593 struct mlx5_core_health *health; 594 595 health = container_of(work, struct mlx5_core_health, report_work); 596 597 if (IS_ERR_OR_NULL(health->fw_reporter)) 598 return; 599 600 fw_reporter_ctx.err_synd = health->synd; 601 fw_reporter_ctx.miss_counter = health->miss_counter; 602 if (fw_reporter_ctx.err_synd) { 603 devlink_health_report(health->fw_reporter, 604 "FW syndrome reported", &fw_reporter_ctx); 605 return; 606 } 607 if (fw_reporter_ctx.miss_counter) 608 devlink_health_report(health->fw_reporter, 609 "FW miss counter reported", 610 &fw_reporter_ctx); 611 } 612 613 static const struct devlink_health_reporter_ops mlx5_fw_reporter_ops = { 614 .name = "fw", 615 .diagnose = mlx5_fw_reporter_diagnose, 616 .dump = mlx5_fw_reporter_dump, 617 }; 618 619 static int 620 mlx5_fw_fatal_reporter_recover(struct devlink_health_reporter *reporter, 621 void *priv_ctx, 622 struct netlink_ext_ack *extack) 623 { 624 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter); 625 626 return mlx5_health_try_recover(dev); 627 } 628 629 static int 630 mlx5_fw_fatal_reporter_dump(struct devlink_health_reporter *reporter, 631 struct devlink_fmsg *fmsg, void *priv_ctx, 632 struct netlink_ext_ack *extack) 633 { 634 struct mlx5_core_dev *dev = devlink_health_reporter_priv(reporter); 635 u32 crdump_size = dev->priv.health.crdump_size; 636 u32 *cr_data; 637 int err; 638 639 if (!mlx5_core_is_pf(dev)) 640 return -EPERM; 641 642 cr_data = kvmalloc(crdump_size, GFP_KERNEL); 643 if (!cr_data) 644 return -ENOMEM; 645 err = mlx5_crdump_collect(dev, cr_data); 646 if (err) 647 goto free_data; 648 649 if (priv_ctx) { 650 struct mlx5_fw_reporter_ctx *fw_reporter_ctx = priv_ctx; 651 652 err = mlx5_fw_reporter_ctx_pairs_put(fmsg, fw_reporter_ctx); 653 if (err) 654 goto free_data; 655 } 656 657 err = devlink_fmsg_binary_pair_put(fmsg, "crdump_data", cr_data, crdump_size); 658 659 free_data: 660 kvfree(cr_data); 661 return err; 662 } 663 664 static void mlx5_fw_fatal_reporter_err_work(struct work_struct *work) 665 { 666 struct mlx5_fw_reporter_ctx fw_reporter_ctx; 667 struct mlx5_core_health *health; 668 struct mlx5_core_dev *dev; 669 struct devlink *devlink; 670 struct mlx5_priv *priv; 671 672 health = container_of(work, struct mlx5_core_health, fatal_report_work); 673 priv = container_of(health, struct mlx5_priv, health); 674 dev = container_of(priv, struct mlx5_core_dev, priv); 675 devlink = priv_to_devlink(dev); 676 677 enter_error_state(dev, false); 678 if (IS_ERR_OR_NULL(health->fw_fatal_reporter)) { 679 devl_lock(devlink); 680 if (mlx5_health_try_recover(dev)) 681 mlx5_core_err(dev, "health recovery failed\n"); 682 devl_unlock(devlink); 683 return; 684 } 685 fw_reporter_ctx.err_synd = health->synd; 686 fw_reporter_ctx.miss_counter = health->miss_counter; 687 if (devlink_health_report(health->fw_fatal_reporter, 688 "FW fatal error reported", &fw_reporter_ctx) == -ECANCELED) { 689 /* If recovery wasn't performed, due to grace period, 690 * unload the driver. This ensures that the driver 691 * closes all its resources and it is not subjected to 692 * requests from the kernel. 693 */ 694 mlx5_core_err(dev, "Driver is in error state. Unloading\n"); 695 mlx5_unload_one(dev); 696 } 697 } 698 699 static const struct devlink_health_reporter_ops mlx5_fw_fatal_reporter_ops = { 700 .name = "fw_fatal", 701 .recover = mlx5_fw_fatal_reporter_recover, 702 .dump = mlx5_fw_fatal_reporter_dump, 703 }; 704 705 #define MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD 180000 706 #define MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD 60000 707 #define MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD 30000 708 #define MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD MLX5_FW_REPORTER_VF_GRACEFUL_PERIOD 709 710 static void mlx5_fw_reporters_create(struct mlx5_core_dev *dev) 711 { 712 struct mlx5_core_health *health = &dev->priv.health; 713 struct devlink *devlink = priv_to_devlink(dev); 714 u64 grace_period; 715 716 if (mlx5_core_is_ecpf(dev)) { 717 grace_period = MLX5_FW_REPORTER_ECPF_GRACEFUL_PERIOD; 718 } else if (mlx5_core_is_pf(dev)) { 719 grace_period = MLX5_FW_REPORTER_PF_GRACEFUL_PERIOD; 720 } else { 721 /* VF or SF */ 722 grace_period = MLX5_FW_REPORTER_DEFAULT_GRACEFUL_PERIOD; 723 } 724 725 health->fw_reporter = 726 devlink_health_reporter_create(devlink, &mlx5_fw_reporter_ops, 727 0, dev); 728 if (IS_ERR(health->fw_reporter)) 729 mlx5_core_warn(dev, "Failed to create fw reporter, err = %ld\n", 730 PTR_ERR(health->fw_reporter)); 731 732 health->fw_fatal_reporter = 733 devlink_health_reporter_create(devlink, 734 &mlx5_fw_fatal_reporter_ops, 735 grace_period, 736 dev); 737 if (IS_ERR(health->fw_fatal_reporter)) 738 mlx5_core_warn(dev, "Failed to create fw fatal reporter, err = %ld\n", 739 PTR_ERR(health->fw_fatal_reporter)); 740 } 741 742 static void mlx5_fw_reporters_destroy(struct mlx5_core_dev *dev) 743 { 744 struct mlx5_core_health *health = &dev->priv.health; 745 746 if (!IS_ERR_OR_NULL(health->fw_reporter)) 747 devlink_health_reporter_destroy(health->fw_reporter); 748 749 if (!IS_ERR_OR_NULL(health->fw_fatal_reporter)) 750 devlink_health_reporter_destroy(health->fw_fatal_reporter); 751 } 752 753 static unsigned long get_next_poll_jiffies(struct mlx5_core_dev *dev) 754 { 755 unsigned long next; 756 757 get_random_bytes(&next, sizeof(next)); 758 next %= HZ; 759 next += jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL)); 760 761 return next; 762 } 763 764 void mlx5_trigger_health_work(struct mlx5_core_dev *dev) 765 { 766 struct mlx5_core_health *health = &dev->priv.health; 767 unsigned long flags; 768 769 spin_lock_irqsave(&health->wq_lock, flags); 770 if (!test_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags)) 771 queue_work(health->wq, &health->fatal_report_work); 772 else 773 mlx5_core_err(dev, "new health works are not permitted at this stage\n"); 774 spin_unlock_irqrestore(&health->wq_lock, flags); 775 } 776 777 #define MLX5_MSEC_PER_HOUR (MSEC_PER_SEC * 60 * 60) 778 static void mlx5_health_log_ts_update(struct work_struct *work) 779 { 780 struct delayed_work *dwork = to_delayed_work(work); 781 u32 out[MLX5_ST_SZ_DW(mrtc_reg)] = {}; 782 u32 in[MLX5_ST_SZ_DW(mrtc_reg)] = {}; 783 struct mlx5_core_health *health; 784 struct mlx5_core_dev *dev; 785 struct mlx5_priv *priv; 786 u64 now_us; 787 788 health = container_of(dwork, struct mlx5_core_health, update_fw_log_ts_work); 789 priv = container_of(health, struct mlx5_priv, health); 790 dev = container_of(priv, struct mlx5_core_dev, priv); 791 792 now_us = ktime_to_us(ktime_get_real()); 793 794 MLX5_SET(mrtc_reg, in, time_h, now_us >> 32); 795 MLX5_SET(mrtc_reg, in, time_l, now_us & 0xFFFFFFFF); 796 mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MRTC, 0, 1); 797 798 queue_delayed_work(health->wq, &health->update_fw_log_ts_work, 799 msecs_to_jiffies(MLX5_MSEC_PER_HOUR)); 800 } 801 802 static void poll_health(struct timer_list *t) 803 { 804 struct mlx5_core_dev *dev = from_timer(dev, t, priv.health.timer); 805 struct mlx5_core_health *health = &dev->priv.health; 806 struct health_buffer __iomem *h = health->health; 807 u32 fatal_error; 808 u8 prev_synd; 809 u32 count; 810 811 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) 812 goto out; 813 814 fatal_error = mlx5_health_check_fatal_sensors(dev); 815 816 if (fatal_error && !health->fatal_error) { 817 mlx5_core_err(dev, "Fatal error %u detected\n", fatal_error); 818 dev->priv.health.fatal_error = fatal_error; 819 print_health_info(dev); 820 dev->state = MLX5_DEVICE_STATE_INTERNAL_ERROR; 821 mlx5_trigger_health_work(dev); 822 return; 823 } 824 825 count = ioread32be(health->health_counter); 826 if (count == health->prev) 827 ++health->miss_counter; 828 else 829 health->miss_counter = 0; 830 831 health->prev = count; 832 if (health->miss_counter == MAX_MISSES) { 833 mlx5_core_err(dev, "device's health compromised - reached miss count\n"); 834 print_health_info(dev); 835 queue_work(health->wq, &health->report_work); 836 } 837 838 prev_synd = health->synd; 839 health->synd = ioread8(&h->synd); 840 if (health->synd && health->synd != prev_synd) 841 queue_work(health->wq, &health->report_work); 842 843 out: 844 mod_timer(&health->timer, get_next_poll_jiffies(dev)); 845 } 846 847 void mlx5_start_health_poll(struct mlx5_core_dev *dev) 848 { 849 u64 poll_interval_ms = mlx5_tout_ms(dev, HEALTH_POLL_INTERVAL); 850 struct mlx5_core_health *health = &dev->priv.health; 851 852 timer_setup(&health->timer, poll_health, 0); 853 health->fatal_error = MLX5_SENSOR_NO_ERR; 854 clear_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags); 855 health->health = &dev->iseg->health; 856 health->health_counter = &dev->iseg->health_counter; 857 858 health->timer.expires = jiffies + msecs_to_jiffies(poll_interval_ms); 859 add_timer(&health->timer); 860 } 861 862 void mlx5_stop_health_poll(struct mlx5_core_dev *dev, bool disable_health) 863 { 864 struct mlx5_core_health *health = &dev->priv.health; 865 unsigned long flags; 866 867 if (disable_health) { 868 spin_lock_irqsave(&health->wq_lock, flags); 869 set_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags); 870 spin_unlock_irqrestore(&health->wq_lock, flags); 871 } 872 873 del_timer_sync(&health->timer); 874 } 875 876 void mlx5_start_health_fw_log_up(struct mlx5_core_dev *dev) 877 { 878 struct mlx5_core_health *health = &dev->priv.health; 879 880 if (mlx5_core_is_pf(dev) && MLX5_CAP_MCAM_REG(dev, mrtc)) 881 queue_delayed_work(health->wq, &health->update_fw_log_ts_work, 0); 882 } 883 884 void mlx5_drain_health_wq(struct mlx5_core_dev *dev) 885 { 886 struct mlx5_core_health *health = &dev->priv.health; 887 unsigned long flags; 888 889 spin_lock_irqsave(&health->wq_lock, flags); 890 set_bit(MLX5_DROP_NEW_HEALTH_WORK, &health->flags); 891 spin_unlock_irqrestore(&health->wq_lock, flags); 892 cancel_delayed_work_sync(&health->update_fw_log_ts_work); 893 cancel_work_sync(&health->report_work); 894 cancel_work_sync(&health->fatal_report_work); 895 } 896 897 void mlx5_health_cleanup(struct mlx5_core_dev *dev) 898 { 899 struct mlx5_core_health *health = &dev->priv.health; 900 901 cancel_delayed_work_sync(&health->update_fw_log_ts_work); 902 destroy_workqueue(health->wq); 903 mlx5_fw_reporters_destroy(dev); 904 } 905 906 int mlx5_health_init(struct mlx5_core_dev *dev) 907 { 908 struct mlx5_core_health *health; 909 char *name; 910 911 mlx5_fw_reporters_create(dev); 912 913 health = &dev->priv.health; 914 name = kmalloc(64, GFP_KERNEL); 915 if (!name) 916 goto out_err; 917 918 strcpy(name, "mlx5_health"); 919 strcat(name, dev_name(dev->device)); 920 health->wq = create_singlethread_workqueue(name); 921 kfree(name); 922 if (!health->wq) 923 goto out_err; 924 spin_lock_init(&health->wq_lock); 925 INIT_WORK(&health->fatal_report_work, mlx5_fw_fatal_reporter_err_work); 926 INIT_WORK(&health->report_work, mlx5_fw_reporter_err_work); 927 INIT_DELAYED_WORK(&health->update_fw_log_ts_work, mlx5_health_log_ts_update); 928 929 return 0; 930 931 out_err: 932 mlx5_fw_reporters_destroy(dev); 933 return -ENOMEM; 934 } 935