1 /* 2 * Copyright 2023 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 */ 22 23 #include "kfd_debug.h" 24 #include "kfd_device_queue_manager.h" 25 #include "kfd_topology.h" 26 #include <linux/file.h> 27 #include <uapi/linux/kfd_ioctl.h> 28 #include <uapi/linux/kfd_sysfs.h> 29 30 #define MAX_WATCH_ADDRESSES 4 31 32 int kfd_dbg_ev_query_debug_event(struct kfd_process *process, 33 unsigned int *queue_id, 34 unsigned int *gpu_id, 35 uint64_t exception_clear_mask, 36 uint64_t *event_status) 37 { 38 struct process_queue_manager *pqm; 39 struct process_queue_node *pqn; 40 int i; 41 42 if (!(process && process->debug_trap_enabled)) 43 return -ENODATA; 44 45 mutex_lock(&process->event_mutex); 46 *event_status = 0; 47 *queue_id = 0; 48 *gpu_id = 0; 49 50 /* find and report queue events */ 51 pqm = &process->pqm; 52 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 53 uint64_t tmp = process->exception_enable_mask; 54 55 if (!pqn->q) 56 continue; 57 58 tmp &= pqn->q->properties.exception_status; 59 60 if (!tmp) 61 continue; 62 63 *event_status = pqn->q->properties.exception_status; 64 *queue_id = pqn->q->properties.queue_id; 65 *gpu_id = pqn->q->device->id; 66 pqn->q->properties.exception_status &= ~exception_clear_mask; 67 goto out; 68 } 69 70 /* find and report device events */ 71 for (i = 0; i < process->n_pdds; i++) { 72 struct kfd_process_device *pdd = process->pdds[i]; 73 uint64_t tmp = process->exception_enable_mask 74 & pdd->exception_status; 75 76 if (!tmp) 77 continue; 78 79 *event_status = pdd->exception_status; 80 *gpu_id = pdd->dev->id; 81 pdd->exception_status &= ~exception_clear_mask; 82 goto out; 83 } 84 85 /* report process events */ 86 if (process->exception_enable_mask & process->exception_status) { 87 *event_status = process->exception_status; 88 process->exception_status &= ~exception_clear_mask; 89 } 90 91 out: 92 mutex_unlock(&process->event_mutex); 93 return *event_status ? 0 : -EAGAIN; 94 } 95 96 void debug_event_write_work_handler(struct work_struct *work) 97 { 98 struct kfd_process *process; 99 100 static const char write_data = '.'; 101 loff_t pos = 0; 102 103 process = container_of(work, 104 struct kfd_process, 105 debug_event_workarea); 106 107 if (process->debug_trap_enabled && process->dbg_ev_file) 108 kernel_write(process->dbg_ev_file, &write_data, 1, &pos); 109 } 110 111 /* update process/device/queue exception status, write to descriptor 112 * only if exception_status is enabled. 113 */ 114 bool kfd_dbg_ev_raise(uint64_t event_mask, 115 struct kfd_process *process, struct kfd_node *dev, 116 unsigned int source_id, bool use_worker, 117 void *exception_data, size_t exception_data_size) 118 { 119 struct process_queue_manager *pqm; 120 struct process_queue_node *pqn; 121 int i; 122 static const char write_data = '.'; 123 loff_t pos = 0; 124 bool is_subscribed = true; 125 126 if (!(process && process->debug_trap_enabled)) 127 return false; 128 129 mutex_lock(&process->event_mutex); 130 131 if (event_mask & KFD_EC_MASK_DEVICE) { 132 for (i = 0; i < process->n_pdds; i++) { 133 struct kfd_process_device *pdd = process->pdds[i]; 134 135 if (pdd->dev != dev) 136 continue; 137 138 pdd->exception_status |= event_mask & KFD_EC_MASK_DEVICE; 139 140 if (event_mask & KFD_EC_MASK(EC_DEVICE_MEMORY_VIOLATION)) { 141 if (!pdd->vm_fault_exc_data) { 142 pdd->vm_fault_exc_data = kmemdup( 143 exception_data, 144 exception_data_size, 145 GFP_KERNEL); 146 if (!pdd->vm_fault_exc_data) 147 pr_debug("Failed to allocate exception data memory"); 148 } else { 149 pr_debug("Debugger exception data not saved\n"); 150 print_hex_dump_bytes("exception data: ", 151 DUMP_PREFIX_OFFSET, 152 exception_data, 153 exception_data_size); 154 } 155 } 156 break; 157 } 158 } else if (event_mask & KFD_EC_MASK_PROCESS) { 159 process->exception_status |= event_mask & KFD_EC_MASK_PROCESS; 160 } else { 161 pqm = &process->pqm; 162 list_for_each_entry(pqn, &pqm->queues, 163 process_queue_list) { 164 int target_id; 165 166 if (!pqn->q) 167 continue; 168 169 target_id = event_mask & KFD_EC_MASK(EC_QUEUE_NEW) ? 170 pqn->q->properties.queue_id : 171 pqn->q->doorbell_id; 172 173 if (pqn->q->device != dev || target_id != source_id) 174 continue; 175 176 pqn->q->properties.exception_status |= event_mask; 177 break; 178 } 179 } 180 181 if (process->exception_enable_mask & event_mask) { 182 if (use_worker) 183 schedule_work(&process->debug_event_workarea); 184 else 185 kernel_write(process->dbg_ev_file, 186 &write_data, 187 1, 188 &pos); 189 } else { 190 is_subscribed = false; 191 } 192 193 mutex_unlock(&process->event_mutex); 194 195 return is_subscribed; 196 } 197 198 /* set pending event queue entry from ring entry */ 199 bool kfd_set_dbg_ev_from_interrupt(struct kfd_node *dev, 200 unsigned int pasid, 201 uint32_t doorbell_id, 202 uint64_t trap_mask, 203 void *exception_data, 204 size_t exception_data_size) 205 { 206 struct kfd_process *p; 207 bool signaled_to_debugger_or_runtime = false; 208 209 p = kfd_lookup_process_by_pasid(pasid); 210 211 if (!p) 212 return false; 213 214 if (!kfd_dbg_ev_raise(trap_mask, p, dev, doorbell_id, true, 215 exception_data, exception_data_size)) { 216 struct process_queue_manager *pqm; 217 struct process_queue_node *pqn; 218 219 if (!!(trap_mask & KFD_EC_MASK_QUEUE) && 220 p->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) { 221 mutex_lock(&p->mutex); 222 223 pqm = &p->pqm; 224 list_for_each_entry(pqn, &pqm->queues, 225 process_queue_list) { 226 227 if (!(pqn->q && pqn->q->device == dev && 228 pqn->q->doorbell_id == doorbell_id)) 229 continue; 230 231 kfd_send_exception_to_runtime(p, pqn->q->properties.queue_id, 232 trap_mask); 233 234 signaled_to_debugger_or_runtime = true; 235 236 break; 237 } 238 239 mutex_unlock(&p->mutex); 240 } else if (trap_mask & KFD_EC_MASK(EC_DEVICE_MEMORY_VIOLATION)) { 241 kfd_dqm_evict_pasid(dev->dqm, p->pasid); 242 kfd_signal_vm_fault_event(dev, p->pasid, NULL, 243 exception_data); 244 245 signaled_to_debugger_or_runtime = true; 246 } 247 } else { 248 signaled_to_debugger_or_runtime = true; 249 } 250 251 kfd_unref_process(p); 252 253 return signaled_to_debugger_or_runtime; 254 } 255 256 int kfd_dbg_send_exception_to_runtime(struct kfd_process *p, 257 unsigned int dev_id, 258 unsigned int queue_id, 259 uint64_t error_reason) 260 { 261 if (error_reason & KFD_EC_MASK(EC_DEVICE_MEMORY_VIOLATION)) { 262 struct kfd_process_device *pdd = NULL; 263 struct kfd_hsa_memory_exception_data *data; 264 int i; 265 266 for (i = 0; i < p->n_pdds; i++) { 267 if (p->pdds[i]->dev->id == dev_id) { 268 pdd = p->pdds[i]; 269 break; 270 } 271 } 272 273 if (!pdd) 274 return -ENODEV; 275 276 data = (struct kfd_hsa_memory_exception_data *) 277 pdd->vm_fault_exc_data; 278 279 kfd_dqm_evict_pasid(pdd->dev->dqm, p->pasid); 280 kfd_signal_vm_fault_event(pdd->dev, p->pasid, NULL, data); 281 error_reason &= ~KFD_EC_MASK(EC_DEVICE_MEMORY_VIOLATION); 282 } 283 284 if (error_reason & (KFD_EC_MASK(EC_PROCESS_RUNTIME))) { 285 /* 286 * block should only happen after the debugger receives runtime 287 * enable notice. 288 */ 289 up(&p->runtime_enable_sema); 290 error_reason &= ~KFD_EC_MASK(EC_PROCESS_RUNTIME); 291 } 292 293 if (error_reason) 294 return kfd_send_exception_to_runtime(p, queue_id, error_reason); 295 296 return 0; 297 } 298 299 static int kfd_dbg_set_queue_workaround(struct queue *q, bool enable) 300 { 301 struct mqd_update_info minfo = {0}; 302 int err; 303 304 if (!q) 305 return 0; 306 307 if (!kfd_dbg_has_cwsr_workaround(q->device)) 308 return 0; 309 310 if (enable && q->properties.is_user_cu_masked) 311 return -EBUSY; 312 313 minfo.update_flag = enable ? UPDATE_FLAG_DBG_WA_ENABLE : UPDATE_FLAG_DBG_WA_DISABLE; 314 315 q->properties.is_dbg_wa = enable; 316 err = q->device->dqm->ops.update_queue(q->device->dqm, q, &minfo); 317 if (err) 318 q->properties.is_dbg_wa = false; 319 320 return err; 321 } 322 323 static int kfd_dbg_set_workaround(struct kfd_process *target, bool enable) 324 { 325 struct process_queue_manager *pqm = &target->pqm; 326 struct process_queue_node *pqn; 327 int r = 0; 328 329 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 330 r = kfd_dbg_set_queue_workaround(pqn->q, enable); 331 if (enable && r) 332 goto unwind; 333 } 334 335 return 0; 336 337 unwind: 338 list_for_each_entry(pqn, &pqm->queues, process_queue_list) 339 kfd_dbg_set_queue_workaround(pqn->q, false); 340 341 if (enable) 342 target->runtime_info.runtime_state = r == -EBUSY ? 343 DEBUG_RUNTIME_STATE_ENABLED_BUSY : 344 DEBUG_RUNTIME_STATE_ENABLED_ERROR; 345 346 return r; 347 } 348 349 int kfd_dbg_set_mes_debug_mode(struct kfd_process_device *pdd, bool sq_trap_en) 350 { 351 uint32_t spi_dbg_cntl = pdd->spi_dbg_override | pdd->spi_dbg_launch_mode; 352 uint32_t flags = pdd->process->dbg_flags; 353 354 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 355 return 0; 356 357 return amdgpu_mes_set_shader_debugger(pdd->dev->adev, pdd->proc_ctx_gpu_addr, spi_dbg_cntl, 358 pdd->watch_points, flags, sq_trap_en); 359 } 360 361 #define KFD_DEBUGGER_INVALID_WATCH_POINT_ID -1 362 static int kfd_dbg_get_dev_watch_id(struct kfd_process_device *pdd, int *watch_id) 363 { 364 int i; 365 366 *watch_id = KFD_DEBUGGER_INVALID_WATCH_POINT_ID; 367 368 spin_lock(&pdd->dev->watch_points_lock); 369 370 for (i = 0; i < MAX_WATCH_ADDRESSES; i++) { 371 /* device watchpoint in use so skip */ 372 if ((pdd->dev->alloc_watch_ids >> i) & 0x1) 373 continue; 374 375 pdd->alloc_watch_ids |= 0x1 << i; 376 pdd->dev->alloc_watch_ids |= 0x1 << i; 377 *watch_id = i; 378 spin_unlock(&pdd->dev->watch_points_lock); 379 return 0; 380 } 381 382 spin_unlock(&pdd->dev->watch_points_lock); 383 384 return -ENOMEM; 385 } 386 387 static void kfd_dbg_clear_dev_watch_id(struct kfd_process_device *pdd, int watch_id) 388 { 389 spin_lock(&pdd->dev->watch_points_lock); 390 391 /* process owns device watch point so safe to clear */ 392 if ((pdd->alloc_watch_ids >> watch_id) & 0x1) { 393 pdd->alloc_watch_ids &= ~(0x1 << watch_id); 394 pdd->dev->alloc_watch_ids &= ~(0x1 << watch_id); 395 } 396 397 spin_unlock(&pdd->dev->watch_points_lock); 398 } 399 400 static bool kfd_dbg_owns_dev_watch_id(struct kfd_process_device *pdd, int watch_id) 401 { 402 bool owns_watch_id = false; 403 404 spin_lock(&pdd->dev->watch_points_lock); 405 owns_watch_id = watch_id < MAX_WATCH_ADDRESSES && 406 ((pdd->alloc_watch_ids >> watch_id) & 0x1); 407 408 spin_unlock(&pdd->dev->watch_points_lock); 409 410 return owns_watch_id; 411 } 412 413 int kfd_dbg_trap_clear_dev_address_watch(struct kfd_process_device *pdd, 414 uint32_t watch_id) 415 { 416 int r; 417 418 if (!kfd_dbg_owns_dev_watch_id(pdd, watch_id)) 419 return -EINVAL; 420 421 if (!pdd->dev->kfd->shared_resources.enable_mes) { 422 r = debug_lock_and_unmap(pdd->dev->dqm); 423 if (r) 424 return r; 425 } 426 427 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 428 pdd->watch_points[watch_id] = pdd->dev->kfd2kgd->clear_address_watch( 429 pdd->dev->adev, 430 watch_id); 431 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 432 433 if (!pdd->dev->kfd->shared_resources.enable_mes) 434 r = debug_map_and_unlock(pdd->dev->dqm); 435 else 436 r = kfd_dbg_set_mes_debug_mode(pdd, true); 437 438 kfd_dbg_clear_dev_watch_id(pdd, watch_id); 439 440 return r; 441 } 442 443 int kfd_dbg_trap_set_dev_address_watch(struct kfd_process_device *pdd, 444 uint64_t watch_address, 445 uint32_t watch_address_mask, 446 uint32_t *watch_id, 447 uint32_t watch_mode) 448 { 449 int xcc_id, r = kfd_dbg_get_dev_watch_id(pdd, watch_id); 450 uint32_t xcc_mask = pdd->dev->xcc_mask; 451 452 if (r) 453 return r; 454 455 if (!pdd->dev->kfd->shared_resources.enable_mes) { 456 r = debug_lock_and_unmap(pdd->dev->dqm); 457 if (r) { 458 kfd_dbg_clear_dev_watch_id(pdd, *watch_id); 459 return r; 460 } 461 } 462 463 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 464 for_each_inst(xcc_id, xcc_mask) 465 pdd->watch_points[*watch_id] = pdd->dev->kfd2kgd->set_address_watch( 466 pdd->dev->adev, 467 watch_address, 468 watch_address_mask, 469 *watch_id, 470 watch_mode, 471 pdd->dev->vm_info.last_vmid_kfd, 472 xcc_id); 473 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 474 475 if (!pdd->dev->kfd->shared_resources.enable_mes) 476 r = debug_map_and_unlock(pdd->dev->dqm); 477 else 478 r = kfd_dbg_set_mes_debug_mode(pdd, true); 479 480 /* HWS is broken so no point in HW rollback but release the watchpoint anyways */ 481 if (r) 482 kfd_dbg_clear_dev_watch_id(pdd, *watch_id); 483 484 return 0; 485 } 486 487 static void kfd_dbg_clear_process_address_watch(struct kfd_process *target) 488 { 489 int i, j; 490 491 for (i = 0; i < target->n_pdds; i++) 492 for (j = 0; j < MAX_WATCH_ADDRESSES; j++) 493 kfd_dbg_trap_clear_dev_address_watch(target->pdds[i], j); 494 } 495 496 int kfd_dbg_trap_set_flags(struct kfd_process *target, uint32_t *flags) 497 { 498 uint32_t prev_flags = target->dbg_flags; 499 int i, r = 0, rewind_count = 0; 500 501 for (i = 0; i < target->n_pdds; i++) { 502 struct kfd_topology_device *topo_dev = 503 kfd_topology_device_by_id(target->pdds[i]->dev->id); 504 uint32_t caps = topo_dev->node_props.capability; 505 506 if (!(caps & HSA_CAP_TRAP_DEBUG_PRECISE_MEMORY_OPERATIONS_SUPPORTED) && 507 (*flags & KFD_DBG_TRAP_FLAG_SINGLE_MEM_OP)) { 508 *flags = prev_flags; 509 return -EACCES; 510 } 511 512 if (!(caps & HSA_CAP_TRAP_DEBUG_PRECISE_ALU_OPERATIONS_SUPPORTED) && 513 (*flags & KFD_DBG_TRAP_FLAG_SINGLE_ALU_OP)) { 514 *flags = prev_flags; 515 return -EACCES; 516 } 517 } 518 519 target->dbg_flags = *flags; 520 *flags = prev_flags; 521 for (i = 0; i < target->n_pdds; i++) { 522 struct kfd_process_device *pdd = target->pdds[i]; 523 524 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 525 continue; 526 527 if (!pdd->dev->kfd->shared_resources.enable_mes) 528 r = debug_refresh_runlist(pdd->dev->dqm); 529 else 530 r = kfd_dbg_set_mes_debug_mode(pdd, true); 531 532 if (r) { 533 target->dbg_flags = prev_flags; 534 break; 535 } 536 537 rewind_count++; 538 } 539 540 /* Rewind flags */ 541 if (r) { 542 target->dbg_flags = prev_flags; 543 544 for (i = 0; i < rewind_count; i++) { 545 struct kfd_process_device *pdd = target->pdds[i]; 546 547 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 548 continue; 549 550 if (!pdd->dev->kfd->shared_resources.enable_mes) 551 debug_refresh_runlist(pdd->dev->dqm); 552 else 553 kfd_dbg_set_mes_debug_mode(pdd, true); 554 } 555 } 556 557 return r; 558 } 559 560 /* kfd_dbg_trap_deactivate: 561 * target: target process 562 * unwind: If this is unwinding a failed kfd_dbg_trap_enable() 563 * unwind_count: 564 * If unwind == true, how far down the pdd list we need 565 * to unwind 566 * else: ignored 567 */ 568 void kfd_dbg_trap_deactivate(struct kfd_process *target, bool unwind, int unwind_count) 569 { 570 int i; 571 572 if (!unwind) { 573 uint32_t flags = 0; 574 int resume_count = resume_queues(target, 0, NULL); 575 576 if (resume_count) 577 pr_debug("Resumed %d queues\n", resume_count); 578 579 cancel_work_sync(&target->debug_event_workarea); 580 kfd_dbg_clear_process_address_watch(target); 581 kfd_dbg_trap_set_wave_launch_mode(target, 0); 582 583 kfd_dbg_trap_set_flags(target, &flags); 584 } 585 586 for (i = 0; i < target->n_pdds; i++) { 587 struct kfd_process_device *pdd = target->pdds[i]; 588 589 /* If this is an unwind, and we have unwound the required 590 * enable calls on the pdd list, we need to stop now 591 * otherwise we may mess up another debugger session. 592 */ 593 if (unwind && i == unwind_count) 594 break; 595 596 kfd_process_set_trap_debug_flag(&pdd->qpd, false); 597 598 /* GFX off is already disabled by debug activate if not RLC restore supported. */ 599 if (kfd_dbg_is_rlc_restore_supported(pdd->dev)) 600 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 601 pdd->spi_dbg_override = 602 pdd->dev->kfd2kgd->disable_debug_trap( 603 pdd->dev->adev, 604 target->runtime_info.ttmp_setup, 605 pdd->dev->vm_info.last_vmid_kfd); 606 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 607 608 if (!kfd_dbg_is_per_vmid_supported(pdd->dev) && 609 release_debug_trap_vmid(pdd->dev->dqm, &pdd->qpd)) 610 pr_err("Failed to release debug vmid on [%i]\n", pdd->dev->id); 611 612 if (!pdd->dev->kfd->shared_resources.enable_mes) 613 debug_refresh_runlist(pdd->dev->dqm); 614 else 615 kfd_dbg_set_mes_debug_mode(pdd, !kfd_dbg_has_cwsr_workaround(pdd->dev)); 616 } 617 618 kfd_dbg_set_workaround(target, false); 619 } 620 621 static void kfd_dbg_clean_exception_status(struct kfd_process *target) 622 { 623 struct process_queue_manager *pqm; 624 struct process_queue_node *pqn; 625 int i; 626 627 for (i = 0; i < target->n_pdds; i++) { 628 struct kfd_process_device *pdd = target->pdds[i]; 629 630 kfd_process_drain_interrupts(pdd); 631 632 pdd->exception_status = 0; 633 } 634 635 pqm = &target->pqm; 636 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 637 if (!pqn->q) 638 continue; 639 640 pqn->q->properties.exception_status = 0; 641 } 642 643 target->exception_status = 0; 644 } 645 646 int kfd_dbg_trap_disable(struct kfd_process *target) 647 { 648 if (!target->debug_trap_enabled) 649 return 0; 650 651 /* 652 * Defer deactivation to runtime if runtime not enabled otherwise reset 653 * attached running target runtime state to enable for re-attach. 654 */ 655 if (target->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) 656 kfd_dbg_trap_deactivate(target, false, 0); 657 else if (target->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_DISABLED) 658 target->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_ENABLED; 659 660 cancel_work_sync(&target->debug_event_workarea); 661 fput(target->dbg_ev_file); 662 target->dbg_ev_file = NULL; 663 664 if (target->debugger_process) { 665 atomic_dec(&target->debugger_process->debugged_process_count); 666 target->debugger_process = NULL; 667 } 668 669 target->debug_trap_enabled = false; 670 kfd_dbg_clean_exception_status(target); 671 kfd_unref_process(target); 672 673 return 0; 674 } 675 676 int kfd_dbg_trap_activate(struct kfd_process *target) 677 { 678 int i, r = 0; 679 680 r = kfd_dbg_set_workaround(target, true); 681 if (r) 682 return r; 683 684 for (i = 0; i < target->n_pdds; i++) { 685 struct kfd_process_device *pdd = target->pdds[i]; 686 687 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) { 688 r = reserve_debug_trap_vmid(pdd->dev->dqm, &pdd->qpd); 689 690 if (r) { 691 target->runtime_info.runtime_state = (r == -EBUSY) ? 692 DEBUG_RUNTIME_STATE_ENABLED_BUSY : 693 DEBUG_RUNTIME_STATE_ENABLED_ERROR; 694 695 goto unwind_err; 696 } 697 } 698 699 /* Disable GFX OFF to prevent garbage read/writes to debug registers. 700 * If RLC restore of debug registers is not supported and runtime enable 701 * hasn't done so already on ttmp setup request, restore the trap config registers. 702 * 703 * If RLC restore of debug registers is not supported, keep gfx off disabled for 704 * the debug session. 705 */ 706 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 707 if (!(kfd_dbg_is_rlc_restore_supported(pdd->dev) || 708 target->runtime_info.ttmp_setup)) 709 pdd->dev->kfd2kgd->enable_debug_trap(pdd->dev->adev, true, 710 pdd->dev->vm_info.last_vmid_kfd); 711 712 pdd->spi_dbg_override = pdd->dev->kfd2kgd->enable_debug_trap( 713 pdd->dev->adev, 714 false, 715 pdd->dev->vm_info.last_vmid_kfd); 716 717 if (kfd_dbg_is_rlc_restore_supported(pdd->dev)) 718 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 719 720 /* 721 * Setting the debug flag in the trap handler requires that the TMA has been 722 * allocated, which occurs during CWSR initialization. 723 * In the event that CWSR has not been initialized at this point, setting the 724 * flag will be called again during CWSR initialization if the target process 725 * is still debug enabled. 726 */ 727 kfd_process_set_trap_debug_flag(&pdd->qpd, true); 728 729 if (!pdd->dev->kfd->shared_resources.enable_mes) 730 r = debug_refresh_runlist(pdd->dev->dqm); 731 else 732 r = kfd_dbg_set_mes_debug_mode(pdd, true); 733 734 if (r) { 735 target->runtime_info.runtime_state = 736 DEBUG_RUNTIME_STATE_ENABLED_ERROR; 737 goto unwind_err; 738 } 739 } 740 741 return 0; 742 743 unwind_err: 744 /* Enabling debug failed, we need to disable on 745 * all GPUs so the enable is all or nothing. 746 */ 747 kfd_dbg_trap_deactivate(target, true, i); 748 return r; 749 } 750 751 int kfd_dbg_trap_enable(struct kfd_process *target, uint32_t fd, 752 void __user *runtime_info, uint32_t *runtime_size) 753 { 754 struct file *f; 755 uint32_t copy_size; 756 int i, r = 0; 757 758 if (target->debug_trap_enabled) 759 return -EALREADY; 760 761 /* Enable pre-checks */ 762 for (i = 0; i < target->n_pdds; i++) { 763 struct kfd_process_device *pdd = target->pdds[i]; 764 765 if (!KFD_IS_SOC15(pdd->dev)) 766 return -ENODEV; 767 768 if (pdd->qpd.num_gws && (!kfd_dbg_has_gws_support(pdd->dev) || 769 kfd_dbg_has_cwsr_workaround(pdd->dev))) 770 return -EBUSY; 771 } 772 773 copy_size = min((size_t)(*runtime_size), sizeof(target->runtime_info)); 774 775 f = fget(fd); 776 if (!f) { 777 pr_err("Failed to get file for (%i)\n", fd); 778 return -EBADF; 779 } 780 781 target->dbg_ev_file = f; 782 783 /* defer activation to runtime if not runtime enabled */ 784 if (target->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) 785 kfd_dbg_trap_activate(target); 786 787 /* We already hold the process reference but hold another one for the 788 * debug session. 789 */ 790 kref_get(&target->ref); 791 target->debug_trap_enabled = true; 792 793 if (target->debugger_process) 794 atomic_inc(&target->debugger_process->debugged_process_count); 795 796 if (copy_to_user(runtime_info, (void *)&target->runtime_info, copy_size)) { 797 kfd_dbg_trap_deactivate(target, false, 0); 798 r = -EFAULT; 799 } 800 801 *runtime_size = sizeof(target->runtime_info); 802 803 return r; 804 } 805 806 static int kfd_dbg_validate_trap_override_request(struct kfd_process *p, 807 uint32_t trap_override, 808 uint32_t trap_mask_request, 809 uint32_t *trap_mask_supported) 810 { 811 int i = 0; 812 813 *trap_mask_supported = 0xffffffff; 814 815 for (i = 0; i < p->n_pdds; i++) { 816 struct kfd_process_device *pdd = p->pdds[i]; 817 int err = pdd->dev->kfd2kgd->validate_trap_override_request( 818 pdd->dev->adev, 819 trap_override, 820 trap_mask_supported); 821 822 if (err) 823 return err; 824 } 825 826 if (trap_mask_request & ~*trap_mask_supported) 827 return -EACCES; 828 829 return 0; 830 } 831 832 int kfd_dbg_trap_set_wave_launch_override(struct kfd_process *target, 833 uint32_t trap_override, 834 uint32_t trap_mask_bits, 835 uint32_t trap_mask_request, 836 uint32_t *trap_mask_prev, 837 uint32_t *trap_mask_supported) 838 { 839 int r = 0, i; 840 841 r = kfd_dbg_validate_trap_override_request(target, 842 trap_override, 843 trap_mask_request, 844 trap_mask_supported); 845 846 if (r) 847 return r; 848 849 for (i = 0; i < target->n_pdds; i++) { 850 struct kfd_process_device *pdd = target->pdds[i]; 851 852 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 853 pdd->spi_dbg_override = pdd->dev->kfd2kgd->set_wave_launch_trap_override( 854 pdd->dev->adev, 855 pdd->dev->vm_info.last_vmid_kfd, 856 trap_override, 857 trap_mask_bits, 858 trap_mask_request, 859 trap_mask_prev, 860 pdd->spi_dbg_override); 861 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 862 863 if (!pdd->dev->kfd->shared_resources.enable_mes) 864 r = debug_refresh_runlist(pdd->dev->dqm); 865 else 866 r = kfd_dbg_set_mes_debug_mode(pdd, true); 867 868 if (r) 869 break; 870 } 871 872 return r; 873 } 874 875 int kfd_dbg_trap_set_wave_launch_mode(struct kfd_process *target, 876 uint8_t wave_launch_mode) 877 { 878 int r = 0, i; 879 880 if (wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_NORMAL && 881 wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_HALT && 882 wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_DEBUG) 883 return -EINVAL; 884 885 for (i = 0; i < target->n_pdds; i++) { 886 struct kfd_process_device *pdd = target->pdds[i]; 887 888 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 889 pdd->spi_dbg_launch_mode = pdd->dev->kfd2kgd->set_wave_launch_mode( 890 pdd->dev->adev, 891 wave_launch_mode, 892 pdd->dev->vm_info.last_vmid_kfd); 893 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 894 895 if (!pdd->dev->kfd->shared_resources.enable_mes) 896 r = debug_refresh_runlist(pdd->dev->dqm); 897 else 898 r = kfd_dbg_set_mes_debug_mode(pdd, true); 899 900 if (r) 901 break; 902 } 903 904 return r; 905 } 906 907 int kfd_dbg_trap_query_exception_info(struct kfd_process *target, 908 uint32_t source_id, 909 uint32_t exception_code, 910 bool clear_exception, 911 void __user *info, 912 uint32_t *info_size) 913 { 914 bool found = false; 915 int r = 0; 916 uint32_t copy_size, actual_info_size = 0; 917 uint64_t *exception_status_ptr = NULL; 918 919 if (!target) 920 return -EINVAL; 921 922 if (!info || !info_size) 923 return -EINVAL; 924 925 mutex_lock(&target->event_mutex); 926 927 if (KFD_DBG_EC_TYPE_IS_QUEUE(exception_code)) { 928 /* Per queue exceptions */ 929 struct queue *queue = NULL; 930 int i; 931 932 for (i = 0; i < target->n_pdds; i++) { 933 struct kfd_process_device *pdd = target->pdds[i]; 934 struct qcm_process_device *qpd = &pdd->qpd; 935 936 list_for_each_entry(queue, &qpd->queues_list, list) { 937 if (!found && queue->properties.queue_id == source_id) { 938 found = true; 939 break; 940 } 941 } 942 if (found) 943 break; 944 } 945 946 if (!found) { 947 r = -EINVAL; 948 goto out; 949 } 950 951 if (!(queue->properties.exception_status & KFD_EC_MASK(exception_code))) { 952 r = -ENODATA; 953 goto out; 954 } 955 exception_status_ptr = &queue->properties.exception_status; 956 } else if (KFD_DBG_EC_TYPE_IS_DEVICE(exception_code)) { 957 /* Per device exceptions */ 958 struct kfd_process_device *pdd = NULL; 959 int i; 960 961 for (i = 0; i < target->n_pdds; i++) { 962 pdd = target->pdds[i]; 963 if (pdd->dev->id == source_id) { 964 found = true; 965 break; 966 } 967 } 968 969 if (!found) { 970 r = -EINVAL; 971 goto out; 972 } 973 974 if (!(pdd->exception_status & KFD_EC_MASK(exception_code))) { 975 r = -ENODATA; 976 goto out; 977 } 978 979 if (exception_code == EC_DEVICE_MEMORY_VIOLATION) { 980 copy_size = min((size_t)(*info_size), pdd->vm_fault_exc_data_size); 981 982 if (copy_to_user(info, pdd->vm_fault_exc_data, copy_size)) { 983 r = -EFAULT; 984 goto out; 985 } 986 actual_info_size = pdd->vm_fault_exc_data_size; 987 if (clear_exception) { 988 kfree(pdd->vm_fault_exc_data); 989 pdd->vm_fault_exc_data = NULL; 990 pdd->vm_fault_exc_data_size = 0; 991 } 992 } 993 exception_status_ptr = &pdd->exception_status; 994 } else if (KFD_DBG_EC_TYPE_IS_PROCESS(exception_code)) { 995 /* Per process exceptions */ 996 if (!(target->exception_status & KFD_EC_MASK(exception_code))) { 997 r = -ENODATA; 998 goto out; 999 } 1000 1001 if (exception_code == EC_PROCESS_RUNTIME) { 1002 copy_size = min((size_t)(*info_size), sizeof(target->runtime_info)); 1003 1004 if (copy_to_user(info, (void *)&target->runtime_info, copy_size)) { 1005 r = -EFAULT; 1006 goto out; 1007 } 1008 1009 actual_info_size = sizeof(target->runtime_info); 1010 } 1011 1012 exception_status_ptr = &target->exception_status; 1013 } else { 1014 pr_debug("Bad exception type [%i]\n", exception_code); 1015 r = -EINVAL; 1016 goto out; 1017 } 1018 1019 *info_size = actual_info_size; 1020 if (clear_exception) 1021 *exception_status_ptr &= ~KFD_EC_MASK(exception_code); 1022 out: 1023 mutex_unlock(&target->event_mutex); 1024 return r; 1025 } 1026 1027 int kfd_dbg_trap_device_snapshot(struct kfd_process *target, 1028 uint64_t exception_clear_mask, 1029 void __user *user_info, 1030 uint32_t *number_of_device_infos, 1031 uint32_t *entry_size) 1032 { 1033 struct kfd_dbg_device_info_entry device_info; 1034 uint32_t tmp_entry_size, tmp_num_devices; 1035 int i, r = 0; 1036 1037 if (!(target && user_info && number_of_device_infos && entry_size)) 1038 return -EINVAL; 1039 1040 tmp_entry_size = *entry_size; 1041 1042 tmp_num_devices = min_t(size_t, *number_of_device_infos, target->n_pdds); 1043 *number_of_device_infos = target->n_pdds; 1044 *entry_size = min_t(size_t, *entry_size, sizeof(device_info)); 1045 1046 if (!tmp_num_devices) 1047 return 0; 1048 1049 memset(&device_info, 0, sizeof(device_info)); 1050 1051 mutex_lock(&target->event_mutex); 1052 1053 /* Run over all pdd of the process */ 1054 for (i = 0; i < tmp_num_devices; i++) { 1055 struct kfd_process_device *pdd = target->pdds[i]; 1056 struct kfd_topology_device *topo_dev = kfd_topology_device_by_id(pdd->dev->id); 1057 1058 device_info.gpu_id = pdd->dev->id; 1059 device_info.exception_status = pdd->exception_status; 1060 device_info.lds_base = pdd->lds_base; 1061 device_info.lds_limit = pdd->lds_limit; 1062 device_info.scratch_base = pdd->scratch_base; 1063 device_info.scratch_limit = pdd->scratch_limit; 1064 device_info.gpuvm_base = pdd->gpuvm_base; 1065 device_info.gpuvm_limit = pdd->gpuvm_limit; 1066 device_info.location_id = topo_dev->node_props.location_id; 1067 device_info.vendor_id = topo_dev->node_props.vendor_id; 1068 device_info.device_id = topo_dev->node_props.device_id; 1069 device_info.revision_id = pdd->dev->adev->pdev->revision; 1070 device_info.subsystem_vendor_id = pdd->dev->adev->pdev->subsystem_vendor; 1071 device_info.subsystem_device_id = pdd->dev->adev->pdev->subsystem_device; 1072 device_info.fw_version = pdd->dev->kfd->mec_fw_version; 1073 device_info.gfx_target_version = 1074 topo_dev->node_props.gfx_target_version; 1075 device_info.simd_count = topo_dev->node_props.simd_count; 1076 device_info.max_waves_per_simd = 1077 topo_dev->node_props.max_waves_per_simd; 1078 device_info.array_count = topo_dev->node_props.array_count; 1079 device_info.simd_arrays_per_engine = 1080 topo_dev->node_props.simd_arrays_per_engine; 1081 device_info.num_xcc = NUM_XCC(pdd->dev->xcc_mask); 1082 device_info.capability = topo_dev->node_props.capability; 1083 device_info.debug_prop = topo_dev->node_props.debug_prop; 1084 1085 if (exception_clear_mask) 1086 pdd->exception_status &= ~exception_clear_mask; 1087 1088 if (copy_to_user(user_info, &device_info, *entry_size)) { 1089 r = -EFAULT; 1090 break; 1091 } 1092 1093 user_info += tmp_entry_size; 1094 } 1095 1096 mutex_unlock(&target->event_mutex); 1097 1098 return r; 1099 } 1100 1101 void kfd_dbg_set_enabled_debug_exception_mask(struct kfd_process *target, 1102 uint64_t exception_set_mask) 1103 { 1104 uint64_t found_mask = 0; 1105 struct process_queue_manager *pqm; 1106 struct process_queue_node *pqn; 1107 static const char write_data = '.'; 1108 loff_t pos = 0; 1109 int i; 1110 1111 mutex_lock(&target->event_mutex); 1112 1113 found_mask |= target->exception_status; 1114 1115 pqm = &target->pqm; 1116 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 1117 if (!pqn->q) 1118 continue; 1119 1120 found_mask |= pqn->q->properties.exception_status; 1121 } 1122 1123 for (i = 0; i < target->n_pdds; i++) { 1124 struct kfd_process_device *pdd = target->pdds[i]; 1125 1126 found_mask |= pdd->exception_status; 1127 } 1128 1129 if (exception_set_mask & found_mask) 1130 kernel_write(target->dbg_ev_file, &write_data, 1, &pos); 1131 1132 target->exception_enable_mask = exception_set_mask; 1133 1134 mutex_unlock(&target->event_mutex); 1135 } 1136