1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. */ 3 4 #include <devlink.h> 5 6 #include "fw_reset.h" 7 #include "diag/fw_tracer.h" 8 #include "lib/tout.h" 9 10 enum { 11 MLX5_FW_RESET_FLAGS_RESET_REQUESTED, 12 MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, 13 MLX5_FW_RESET_FLAGS_PENDING_COMP, 14 MLX5_FW_RESET_FLAGS_DROP_NEW_REQUESTS, 15 MLX5_FW_RESET_FLAGS_RELOAD_REQUIRED 16 }; 17 18 struct mlx5_fw_reset { 19 struct mlx5_core_dev *dev; 20 struct mlx5_nb nb; 21 struct workqueue_struct *wq; 22 struct work_struct fw_live_patch_work; 23 struct work_struct reset_request_work; 24 struct work_struct reset_unload_work; 25 struct work_struct reset_reload_work; 26 struct work_struct reset_now_work; 27 struct work_struct reset_abort_work; 28 unsigned long reset_flags; 29 struct timer_list timer; 30 struct completion done; 31 int ret; 32 }; 33 34 enum { 35 MLX5_FW_RST_STATE_IDLE = 0, 36 MLX5_FW_RST_STATE_TOGGLE_REQ = 4, 37 }; 38 39 enum { 40 MLX5_RST_STATE_BIT_NUM = 12, 41 MLX5_RST_ACK_BIT_NUM = 22, 42 }; 43 44 static u8 mlx5_get_fw_rst_state(struct mlx5_core_dev *dev) 45 { 46 return (ioread32be(&dev->iseg->initializing) >> MLX5_RST_STATE_BIT_NUM) & 0xF; 47 } 48 49 static void mlx5_set_fw_rst_ack(struct mlx5_core_dev *dev) 50 { 51 iowrite32be(BIT(MLX5_RST_ACK_BIT_NUM), &dev->iseg->initializing); 52 } 53 54 static int mlx5_fw_reset_enable_remote_dev_reset_set(struct devlink *devlink, u32 id, 55 struct devlink_param_gset_ctx *ctx) 56 { 57 struct mlx5_core_dev *dev = devlink_priv(devlink); 58 struct mlx5_fw_reset *fw_reset; 59 60 fw_reset = dev->priv.fw_reset; 61 62 if (ctx->val.vbool) 63 clear_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags); 64 else 65 set_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags); 66 return 0; 67 } 68 69 static int mlx5_fw_reset_enable_remote_dev_reset_get(struct devlink *devlink, u32 id, 70 struct devlink_param_gset_ctx *ctx) 71 { 72 struct mlx5_core_dev *dev = devlink_priv(devlink); 73 struct mlx5_fw_reset *fw_reset; 74 75 fw_reset = dev->priv.fw_reset; 76 77 ctx->val.vbool = !test_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, 78 &fw_reset->reset_flags); 79 return 0; 80 } 81 82 static int mlx5_reg_mfrl_set(struct mlx5_core_dev *dev, u8 reset_level, 83 u8 reset_type_sel, u8 sync_resp, bool sync_start) 84 { 85 u32 out[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 86 u32 in[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 87 88 MLX5_SET(mfrl_reg, in, reset_level, reset_level); 89 MLX5_SET(mfrl_reg, in, rst_type_sel, reset_type_sel); 90 MLX5_SET(mfrl_reg, in, pci_sync_for_fw_update_resp, sync_resp); 91 MLX5_SET(mfrl_reg, in, pci_sync_for_fw_update_start, sync_start); 92 93 return mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MFRL, 0, 1); 94 } 95 96 static int mlx5_reg_mfrl_query(struct mlx5_core_dev *dev, u8 *reset_level, 97 u8 *reset_type, u8 *reset_state) 98 { 99 u32 out[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 100 u32 in[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 101 int err; 102 103 err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MFRL, 0, 0); 104 if (err) 105 return err; 106 107 if (reset_level) 108 *reset_level = MLX5_GET(mfrl_reg, out, reset_level); 109 if (reset_type) 110 *reset_type = MLX5_GET(mfrl_reg, out, reset_type); 111 if (reset_state) 112 *reset_state = MLX5_GET(mfrl_reg, out, reset_state); 113 114 return 0; 115 } 116 117 int mlx5_fw_reset_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type) 118 { 119 return mlx5_reg_mfrl_query(dev, reset_level, reset_type, NULL); 120 } 121 122 static int mlx5_fw_reset_get_reset_state_err(struct mlx5_core_dev *dev, 123 struct netlink_ext_ack *extack) 124 { 125 u8 reset_state; 126 127 if (mlx5_reg_mfrl_query(dev, NULL, NULL, &reset_state)) 128 goto out; 129 130 if (!reset_state) 131 return 0; 132 133 switch (reset_state) { 134 case MLX5_MFRL_REG_RESET_STATE_IN_NEGOTIATION: 135 case MLX5_MFRL_REG_RESET_STATE_RESET_IN_PROGRESS: 136 NL_SET_ERR_MSG_MOD(extack, "Sync reset still in progress"); 137 return -EBUSY; 138 case MLX5_MFRL_REG_RESET_STATE_NEG_TIMEOUT: 139 NL_SET_ERR_MSG_MOD(extack, "Sync reset negotiation timeout"); 140 return -ETIMEDOUT; 141 case MLX5_MFRL_REG_RESET_STATE_NACK: 142 NL_SET_ERR_MSG_MOD(extack, "One of the hosts disabled reset"); 143 return -EPERM; 144 case MLX5_MFRL_REG_RESET_STATE_UNLOAD_TIMEOUT: 145 NL_SET_ERR_MSG_MOD(extack, "Sync reset unload timeout"); 146 return -ETIMEDOUT; 147 } 148 149 out: 150 NL_SET_ERR_MSG_MOD(extack, "Sync reset failed"); 151 return -EIO; 152 } 153 154 int mlx5_fw_reset_set_reset_sync(struct mlx5_core_dev *dev, u8 reset_type_sel, 155 struct netlink_ext_ack *extack) 156 { 157 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 158 u32 out[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 159 u32 in[MLX5_ST_SZ_DW(mfrl_reg)] = {}; 160 int err, rst_res; 161 162 set_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags); 163 164 MLX5_SET(mfrl_reg, in, reset_level, MLX5_MFRL_REG_RESET_LEVEL3); 165 MLX5_SET(mfrl_reg, in, rst_type_sel, reset_type_sel); 166 MLX5_SET(mfrl_reg, in, pci_sync_for_fw_update_start, 1); 167 err = mlx5_access_reg(dev, in, sizeof(in), out, sizeof(out), 168 MLX5_REG_MFRL, 0, 1, false); 169 if (!err) 170 return 0; 171 172 clear_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags); 173 if (err == -EREMOTEIO && MLX5_CAP_MCAM_FEATURE(dev, reset_state)) { 174 rst_res = mlx5_fw_reset_get_reset_state_err(dev, extack); 175 return rst_res ? rst_res : err; 176 } 177 178 NL_SET_ERR_MSG_MOD(extack, "Sync reset command failed"); 179 return mlx5_cmd_check(dev, err, in, out); 180 } 181 182 int mlx5_fw_reset_verify_fw_complete(struct mlx5_core_dev *dev, 183 struct netlink_ext_ack *extack) 184 { 185 u8 rst_state; 186 int err; 187 188 err = mlx5_fw_reset_get_reset_state_err(dev, extack); 189 if (err) 190 return err; 191 192 rst_state = mlx5_get_fw_rst_state(dev); 193 if (!rst_state) 194 return 0; 195 196 mlx5_core_err(dev, "Sync reset did not complete, state=%d\n", rst_state); 197 NL_SET_ERR_MSG_MOD(extack, "Sync reset did not complete successfully"); 198 return rst_state; 199 } 200 201 int mlx5_fw_reset_set_live_patch(struct mlx5_core_dev *dev) 202 { 203 return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL0, 0, 0, false); 204 } 205 206 static void mlx5_fw_reset_complete_reload(struct mlx5_core_dev *dev, bool unloaded) 207 { 208 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 209 210 /* if this is the driver that initiated the fw reset, devlink completed the reload */ 211 if (test_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags)) { 212 complete(&fw_reset->done); 213 } else { 214 if (!unloaded) 215 mlx5_unload_one(dev, false); 216 if (mlx5_health_wait_pci_up(dev)) 217 mlx5_core_err(dev, "reset reload flow aborted, PCI reads still not working\n"); 218 else 219 mlx5_load_one(dev, true); 220 devlink_remote_reload_actions_performed(priv_to_devlink(dev), 0, 221 BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) | 222 BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE)); 223 } 224 } 225 226 static void mlx5_stop_sync_reset_poll(struct mlx5_core_dev *dev) 227 { 228 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 229 230 del_timer_sync(&fw_reset->timer); 231 } 232 233 static int mlx5_sync_reset_clear_reset_requested(struct mlx5_core_dev *dev, bool poll_health) 234 { 235 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 236 237 if (!test_and_clear_bit(MLX5_FW_RESET_FLAGS_RESET_REQUESTED, &fw_reset->reset_flags)) { 238 mlx5_core_warn(dev, "Reset request was already cleared\n"); 239 return -EALREADY; 240 } 241 242 mlx5_stop_sync_reset_poll(dev); 243 if (poll_health) 244 mlx5_start_health_poll(dev); 245 return 0; 246 } 247 248 static void mlx5_sync_reset_reload_work(struct work_struct *work) 249 { 250 struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, 251 reset_reload_work); 252 struct mlx5_core_dev *dev = fw_reset->dev; 253 254 mlx5_sync_reset_clear_reset_requested(dev, false); 255 mlx5_enter_error_state(dev, true); 256 mlx5_fw_reset_complete_reload(dev, false); 257 } 258 259 #define MLX5_RESET_POLL_INTERVAL (HZ / 10) 260 static void poll_sync_reset(struct timer_list *t) 261 { 262 struct mlx5_fw_reset *fw_reset = from_timer(fw_reset, t, timer); 263 struct mlx5_core_dev *dev = fw_reset->dev; 264 u32 fatal_error; 265 266 if (!test_bit(MLX5_FW_RESET_FLAGS_RESET_REQUESTED, &fw_reset->reset_flags)) 267 return; 268 269 fatal_error = mlx5_health_check_fatal_sensors(dev); 270 271 if (fatal_error) { 272 mlx5_core_warn(dev, "Got Device Reset\n"); 273 if (!test_bit(MLX5_FW_RESET_FLAGS_DROP_NEW_REQUESTS, &fw_reset->reset_flags)) 274 queue_work(fw_reset->wq, &fw_reset->reset_reload_work); 275 else 276 mlx5_core_err(dev, "Device is being removed, Drop new reset work\n"); 277 return; 278 } 279 280 mod_timer(&fw_reset->timer, round_jiffies(jiffies + MLX5_RESET_POLL_INTERVAL)); 281 } 282 283 static void mlx5_start_sync_reset_poll(struct mlx5_core_dev *dev) 284 { 285 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 286 287 timer_setup(&fw_reset->timer, poll_sync_reset, 0); 288 fw_reset->timer.expires = round_jiffies(jiffies + MLX5_RESET_POLL_INTERVAL); 289 add_timer(&fw_reset->timer); 290 } 291 292 static int mlx5_fw_reset_set_reset_sync_ack(struct mlx5_core_dev *dev) 293 { 294 return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL3, 0, 1, false); 295 } 296 297 static int mlx5_fw_reset_set_reset_sync_nack(struct mlx5_core_dev *dev) 298 { 299 return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL3, 0, 2, false); 300 } 301 302 static int mlx5_sync_reset_set_reset_requested(struct mlx5_core_dev *dev) 303 { 304 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 305 306 if (test_and_set_bit(MLX5_FW_RESET_FLAGS_RESET_REQUESTED, &fw_reset->reset_flags)) { 307 mlx5_core_warn(dev, "Reset request was already set\n"); 308 return -EALREADY; 309 } 310 mlx5_stop_health_poll(dev, true); 311 mlx5_start_sync_reset_poll(dev); 312 return 0; 313 } 314 315 static void mlx5_fw_live_patch_event(struct work_struct *work) 316 { 317 struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, 318 fw_live_patch_work); 319 struct mlx5_core_dev *dev = fw_reset->dev; 320 321 mlx5_core_info(dev, "Live patch updated firmware version: %d.%d.%d\n", fw_rev_maj(dev), 322 fw_rev_min(dev), fw_rev_sub(dev)); 323 324 if (mlx5_fw_tracer_reload(dev->tracer)) 325 mlx5_core_err(dev, "Failed to reload FW tracer\n"); 326 } 327 328 #if IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE) 329 static int mlx5_check_hotplug_interrupt(struct mlx5_core_dev *dev) 330 { 331 struct pci_dev *bridge = dev->pdev->bus->self; 332 u16 reg16; 333 int err; 334 335 if (!bridge) 336 return -EOPNOTSUPP; 337 338 err = pcie_capability_read_word(bridge, PCI_EXP_SLTCTL, ®16); 339 if (err) 340 return err; 341 342 if ((reg16 & PCI_EXP_SLTCTL_HPIE) && (reg16 & PCI_EXP_SLTCTL_DLLSCE)) { 343 mlx5_core_warn(dev, "FW reset is not supported as HotPlug is enabled\n"); 344 return -EOPNOTSUPP; 345 } 346 347 return 0; 348 } 349 #endif 350 351 static int mlx5_check_dev_ids(struct mlx5_core_dev *dev, u16 dev_id) 352 { 353 struct pci_bus *bridge_bus = dev->pdev->bus; 354 struct pci_dev *sdev; 355 u16 sdev_id; 356 int err; 357 358 /* Check that all functions under the pci bridge are PFs of 359 * this device otherwise fail this function. 360 */ 361 list_for_each_entry(sdev, &bridge_bus->devices, bus_list) { 362 err = pci_read_config_word(sdev, PCI_DEVICE_ID, &sdev_id); 363 if (err) 364 return pcibios_err_to_errno(err); 365 if (sdev_id != dev_id) { 366 mlx5_core_warn(dev, "unrecognized dev_id (0x%x)\n", sdev_id); 367 return -EPERM; 368 } 369 } 370 return 0; 371 } 372 373 static bool mlx5_is_reset_now_capable(struct mlx5_core_dev *dev) 374 { 375 u16 dev_id; 376 int err; 377 378 if (!MLX5_CAP_GEN(dev, fast_teardown)) { 379 mlx5_core_warn(dev, "fast teardown is not supported by firmware\n"); 380 return false; 381 } 382 383 #if IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE) 384 err = mlx5_check_hotplug_interrupt(dev); 385 if (err) 386 return false; 387 #endif 388 389 err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, &dev_id); 390 if (err) 391 return false; 392 return (!mlx5_check_dev_ids(dev, dev_id)); 393 } 394 395 static void mlx5_sync_reset_request_event(struct work_struct *work) 396 { 397 struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, 398 reset_request_work); 399 struct mlx5_core_dev *dev = fw_reset->dev; 400 int err; 401 402 if (test_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags) || 403 !mlx5_is_reset_now_capable(dev)) { 404 err = mlx5_fw_reset_set_reset_sync_nack(dev); 405 mlx5_core_warn(dev, "PCI Sync FW Update Reset Nack %s", 406 err ? "Failed" : "Sent"); 407 return; 408 } 409 if (mlx5_sync_reset_set_reset_requested(dev)) 410 return; 411 412 err = mlx5_fw_reset_set_reset_sync_ack(dev); 413 if (err) 414 mlx5_core_warn(dev, "PCI Sync FW Update Reset Ack Failed. Error code: %d\n", err); 415 else 416 mlx5_core_warn(dev, "PCI Sync FW Update Reset Ack. Device reset is expected.\n"); 417 } 418 419 static int mlx5_pci_link_toggle(struct mlx5_core_dev *dev) 420 { 421 struct pci_bus *bridge_bus = dev->pdev->bus; 422 struct pci_dev *bridge = bridge_bus->self; 423 unsigned long timeout; 424 struct pci_dev *sdev; 425 u16 reg16, dev_id; 426 int cap, err; 427 428 err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, &dev_id); 429 if (err) 430 return pcibios_err_to_errno(err); 431 err = mlx5_check_dev_ids(dev, dev_id); 432 if (err) 433 return err; 434 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP); 435 if (!cap) 436 return -EOPNOTSUPP; 437 438 list_for_each_entry(sdev, &bridge_bus->devices, bus_list) { 439 pci_save_state(sdev); 440 pci_cfg_access_lock(sdev); 441 } 442 /* PCI link toggle */ 443 err = pcie_capability_set_word(bridge, PCI_EXP_LNKCTL, PCI_EXP_LNKCTL_LD); 444 if (err) 445 return pcibios_err_to_errno(err); 446 msleep(500); 447 err = pcie_capability_clear_word(bridge, PCI_EXP_LNKCTL, PCI_EXP_LNKCTL_LD); 448 if (err) 449 return pcibios_err_to_errno(err); 450 451 /* Check link */ 452 if (!bridge->link_active_reporting) { 453 mlx5_core_warn(dev, "No PCI link reporting capability\n"); 454 msleep(1000); 455 goto restore; 456 } 457 458 timeout = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, PCI_TOGGLE)); 459 do { 460 err = pci_read_config_word(bridge, cap + PCI_EXP_LNKSTA, ®16); 461 if (err) 462 return pcibios_err_to_errno(err); 463 if (reg16 & PCI_EXP_LNKSTA_DLLLA) 464 break; 465 msleep(20); 466 } while (!time_after(jiffies, timeout)); 467 468 if (reg16 & PCI_EXP_LNKSTA_DLLLA) { 469 mlx5_core_info(dev, "PCI Link up\n"); 470 } else { 471 mlx5_core_err(dev, "PCI link not ready (0x%04x) after %llu ms\n", 472 reg16, mlx5_tout_ms(dev, PCI_TOGGLE)); 473 err = -ETIMEDOUT; 474 goto restore; 475 } 476 477 do { 478 err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, ®16); 479 if (err) 480 return pcibios_err_to_errno(err); 481 if (reg16 == dev_id) 482 break; 483 msleep(20); 484 } while (!time_after(jiffies, timeout)); 485 486 if (reg16 == dev_id) { 487 mlx5_core_info(dev, "Firmware responds to PCI config cycles again\n"); 488 } else { 489 mlx5_core_err(dev, "Firmware is not responsive (0x%04x) after %llu ms\n", 490 reg16, mlx5_tout_ms(dev, PCI_TOGGLE)); 491 err = -ETIMEDOUT; 492 } 493 494 restore: 495 list_for_each_entry(sdev, &bridge_bus->devices, bus_list) { 496 pci_cfg_access_unlock(sdev); 497 pci_restore_state(sdev); 498 } 499 500 return err; 501 } 502 503 static void mlx5_sync_reset_now_event(struct work_struct *work) 504 { 505 struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, 506 reset_now_work); 507 struct mlx5_core_dev *dev = fw_reset->dev; 508 int err; 509 510 if (mlx5_sync_reset_clear_reset_requested(dev, false)) 511 return; 512 513 mlx5_core_warn(dev, "Sync Reset now. Device is going to reset.\n"); 514 515 err = mlx5_cmd_fast_teardown_hca(dev); 516 if (err) { 517 mlx5_core_warn(dev, "Fast teardown failed, no reset done, err %d\n", err); 518 goto done; 519 } 520 521 err = mlx5_pci_link_toggle(dev); 522 if (err) { 523 mlx5_core_warn(dev, "mlx5_pci_link_toggle failed, no reset done, err %d\n", err); 524 set_bit(MLX5_FW_RESET_FLAGS_RELOAD_REQUIRED, &fw_reset->reset_flags); 525 } 526 527 mlx5_enter_error_state(dev, true); 528 done: 529 fw_reset->ret = err; 530 mlx5_fw_reset_complete_reload(dev, false); 531 } 532 533 static void mlx5_sync_reset_unload_event(struct work_struct *work) 534 { 535 struct mlx5_fw_reset *fw_reset; 536 struct mlx5_core_dev *dev; 537 unsigned long timeout; 538 bool reset_action; 539 u8 rst_state; 540 int err; 541 542 fw_reset = container_of(work, struct mlx5_fw_reset, reset_unload_work); 543 dev = fw_reset->dev; 544 545 if (mlx5_sync_reset_clear_reset_requested(dev, false)) 546 return; 547 548 mlx5_core_warn(dev, "Sync Reset Unload. Function is forced down.\n"); 549 550 err = mlx5_cmd_fast_teardown_hca(dev); 551 if (err) 552 mlx5_core_warn(dev, "Fast teardown failed, unloading, err %d\n", err); 553 else 554 mlx5_enter_error_state(dev, true); 555 556 if (test_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags)) 557 mlx5_unload_one_devl_locked(dev, false); 558 else 559 mlx5_unload_one(dev, false); 560 561 mlx5_set_fw_rst_ack(dev); 562 mlx5_core_warn(dev, "Sync Reset Unload done, device reset expected\n"); 563 564 reset_action = false; 565 timeout = jiffies + msecs_to_jiffies(mlx5_tout_ms(dev, RESET_UNLOAD)); 566 do { 567 rst_state = mlx5_get_fw_rst_state(dev); 568 if (rst_state == MLX5_FW_RST_STATE_TOGGLE_REQ || 569 rst_state == MLX5_FW_RST_STATE_IDLE) { 570 reset_action = true; 571 break; 572 } 573 msleep(20); 574 } while (!time_after(jiffies, timeout)); 575 576 if (!reset_action) { 577 mlx5_core_err(dev, "Got timeout waiting for sync reset action, state = %u\n", 578 rst_state); 579 fw_reset->ret = -ETIMEDOUT; 580 goto done; 581 } 582 583 mlx5_core_warn(dev, "Sync Reset, got reset action. rst_state = %u\n", rst_state); 584 if (rst_state == MLX5_FW_RST_STATE_TOGGLE_REQ) { 585 err = mlx5_pci_link_toggle(dev); 586 if (err) { 587 mlx5_core_warn(dev, "mlx5_pci_link_toggle failed, err %d\n", err); 588 fw_reset->ret = err; 589 } 590 } 591 592 done: 593 mlx5_fw_reset_complete_reload(dev, true); 594 } 595 596 static void mlx5_sync_reset_abort_event(struct work_struct *work) 597 { 598 struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, 599 reset_abort_work); 600 struct mlx5_core_dev *dev = fw_reset->dev; 601 602 if (mlx5_sync_reset_clear_reset_requested(dev, true)) 603 return; 604 mlx5_core_warn(dev, "PCI Sync FW Update Reset Aborted.\n"); 605 } 606 607 static void mlx5_sync_reset_events_handle(struct mlx5_fw_reset *fw_reset, struct mlx5_eqe *eqe) 608 { 609 struct mlx5_eqe_sync_fw_update *sync_fw_update_eqe; 610 u8 sync_event_rst_type; 611 612 sync_fw_update_eqe = &eqe->data.sync_fw_update; 613 sync_event_rst_type = sync_fw_update_eqe->sync_rst_state & SYNC_RST_STATE_MASK; 614 switch (sync_event_rst_type) { 615 case MLX5_SYNC_RST_STATE_RESET_REQUEST: 616 queue_work(fw_reset->wq, &fw_reset->reset_request_work); 617 break; 618 case MLX5_SYNC_RST_STATE_RESET_UNLOAD: 619 queue_work(fw_reset->wq, &fw_reset->reset_unload_work); 620 break; 621 case MLX5_SYNC_RST_STATE_RESET_NOW: 622 queue_work(fw_reset->wq, &fw_reset->reset_now_work); 623 break; 624 case MLX5_SYNC_RST_STATE_RESET_ABORT: 625 queue_work(fw_reset->wq, &fw_reset->reset_abort_work); 626 break; 627 } 628 } 629 630 static int fw_reset_event_notifier(struct notifier_block *nb, unsigned long action, void *data) 631 { 632 struct mlx5_fw_reset *fw_reset = mlx5_nb_cof(nb, struct mlx5_fw_reset, nb); 633 struct mlx5_eqe *eqe = data; 634 635 if (test_bit(MLX5_FW_RESET_FLAGS_DROP_NEW_REQUESTS, &fw_reset->reset_flags)) 636 return NOTIFY_DONE; 637 638 switch (eqe->sub_type) { 639 case MLX5_GENERAL_SUBTYPE_FW_LIVE_PATCH_EVENT: 640 queue_work(fw_reset->wq, &fw_reset->fw_live_patch_work); 641 break; 642 case MLX5_GENERAL_SUBTYPE_PCI_SYNC_FOR_FW_UPDATE_EVENT: 643 mlx5_sync_reset_events_handle(fw_reset, eqe); 644 break; 645 default: 646 return NOTIFY_DONE; 647 } 648 649 return NOTIFY_OK; 650 } 651 652 int mlx5_fw_reset_wait_reset_done(struct mlx5_core_dev *dev) 653 { 654 unsigned long pci_sync_update_timeout = mlx5_tout_ms(dev, PCI_SYNC_UPDATE); 655 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 656 unsigned long timeout; 657 int err; 658 659 if (MLX5_CAP_GEN(dev, pci_sync_for_fw_update_with_driver_unload)) 660 pci_sync_update_timeout += mlx5_tout_ms(dev, RESET_UNLOAD); 661 timeout = msecs_to_jiffies(pci_sync_update_timeout); 662 if (!wait_for_completion_timeout(&fw_reset->done, timeout)) { 663 mlx5_core_warn(dev, "FW sync reset timeout after %lu seconds\n", 664 pci_sync_update_timeout / 1000); 665 err = -ETIMEDOUT; 666 goto out; 667 } 668 err = fw_reset->ret; 669 if (test_and_clear_bit(MLX5_FW_RESET_FLAGS_RELOAD_REQUIRED, &fw_reset->reset_flags)) { 670 mlx5_unload_one_devl_locked(dev, false); 671 mlx5_load_one_devl_locked(dev, true); 672 } 673 out: 674 clear_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags); 675 return err; 676 } 677 678 void mlx5_fw_reset_events_start(struct mlx5_core_dev *dev) 679 { 680 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 681 682 if (!fw_reset) 683 return; 684 685 MLX5_NB_INIT(&fw_reset->nb, fw_reset_event_notifier, GENERAL_EVENT); 686 mlx5_eq_notifier_register(dev, &fw_reset->nb); 687 } 688 689 void mlx5_fw_reset_events_stop(struct mlx5_core_dev *dev) 690 { 691 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 692 693 if (!fw_reset) 694 return; 695 696 mlx5_eq_notifier_unregister(dev, &fw_reset->nb); 697 } 698 699 void mlx5_drain_fw_reset(struct mlx5_core_dev *dev) 700 { 701 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 702 703 if (!fw_reset) 704 return; 705 706 set_bit(MLX5_FW_RESET_FLAGS_DROP_NEW_REQUESTS, &fw_reset->reset_flags); 707 cancel_work_sync(&fw_reset->fw_live_patch_work); 708 cancel_work_sync(&fw_reset->reset_request_work); 709 cancel_work_sync(&fw_reset->reset_unload_work); 710 cancel_work_sync(&fw_reset->reset_reload_work); 711 cancel_work_sync(&fw_reset->reset_now_work); 712 cancel_work_sync(&fw_reset->reset_abort_work); 713 } 714 715 static const struct devlink_param mlx5_fw_reset_devlink_params[] = { 716 DEVLINK_PARAM_GENERIC(ENABLE_REMOTE_DEV_RESET, BIT(DEVLINK_PARAM_CMODE_RUNTIME), 717 mlx5_fw_reset_enable_remote_dev_reset_get, 718 mlx5_fw_reset_enable_remote_dev_reset_set, NULL), 719 }; 720 721 int mlx5_fw_reset_init(struct mlx5_core_dev *dev) 722 { 723 struct mlx5_fw_reset *fw_reset; 724 int err; 725 726 if (!MLX5_CAP_MCAM_REG(dev, mfrl)) 727 return 0; 728 729 fw_reset = kzalloc(sizeof(*fw_reset), GFP_KERNEL); 730 if (!fw_reset) 731 return -ENOMEM; 732 fw_reset->wq = create_singlethread_workqueue("mlx5_fw_reset_events"); 733 if (!fw_reset->wq) { 734 kfree(fw_reset); 735 return -ENOMEM; 736 } 737 738 fw_reset->dev = dev; 739 dev->priv.fw_reset = fw_reset; 740 741 err = devl_params_register(priv_to_devlink(dev), 742 mlx5_fw_reset_devlink_params, 743 ARRAY_SIZE(mlx5_fw_reset_devlink_params)); 744 if (err) { 745 destroy_workqueue(fw_reset->wq); 746 kfree(fw_reset); 747 return err; 748 } 749 750 INIT_WORK(&fw_reset->fw_live_patch_work, mlx5_fw_live_patch_event); 751 INIT_WORK(&fw_reset->reset_request_work, mlx5_sync_reset_request_event); 752 INIT_WORK(&fw_reset->reset_unload_work, mlx5_sync_reset_unload_event); 753 INIT_WORK(&fw_reset->reset_reload_work, mlx5_sync_reset_reload_work); 754 INIT_WORK(&fw_reset->reset_now_work, mlx5_sync_reset_now_event); 755 INIT_WORK(&fw_reset->reset_abort_work, mlx5_sync_reset_abort_event); 756 757 init_completion(&fw_reset->done); 758 return 0; 759 } 760 761 void mlx5_fw_reset_cleanup(struct mlx5_core_dev *dev) 762 { 763 struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; 764 765 if (!fw_reset) 766 return; 767 768 devl_params_unregister(priv_to_devlink(dev), 769 mlx5_fw_reset_devlink_params, 770 ARRAY_SIZE(mlx5_fw_reset_devlink_params)); 771 destroy_workqueue(fw_reset->wq); 772 kfree(dev->priv.fw_reset); 773 } 774