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 struct kfd_process_device *pdd = NULL; 208 bool signaled_to_debugger_or_runtime = false; 209 210 p = kfd_lookup_process_by_pasid(pasid, &pdd); 211 212 if (!pdd) 213 return false; 214 215 if (!kfd_dbg_ev_raise(trap_mask, p, dev, doorbell_id, true, 216 exception_data, exception_data_size)) { 217 struct process_queue_manager *pqm; 218 struct process_queue_node *pqn; 219 220 if (!!(trap_mask & KFD_EC_MASK_QUEUE) && 221 p->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) { 222 mutex_lock(&p->mutex); 223 224 pqm = &p->pqm; 225 list_for_each_entry(pqn, &pqm->queues, 226 process_queue_list) { 227 228 if (!(pqn->q && pqn->q->device == dev && 229 pqn->q->doorbell_id == doorbell_id)) 230 continue; 231 232 kfd_send_exception_to_runtime(p, pqn->q->properties.queue_id, 233 trap_mask); 234 235 signaled_to_debugger_or_runtime = true; 236 237 break; 238 } 239 240 mutex_unlock(&p->mutex); 241 } else if (trap_mask & KFD_EC_MASK(EC_DEVICE_MEMORY_VIOLATION)) { 242 kfd_evict_process_device(pdd); 243 kfd_signal_vm_fault_event(pdd, NULL, 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_evict_process_device(pdd); 280 kfd_signal_vm_fault_event(pdd, 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 struct amdgpu_device *adev = pdd->dev->adev; 354 int r; 355 356 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 357 return 0; 358 359 if (!pdd->proc_ctx_cpu_ptr) { 360 r = amdgpu_amdkfd_alloc_kernel_mem(adev, 361 AMDGPU_MES_PROC_CTX_SIZE, 362 AMDGPU_GEM_DOMAIN_GTT, 363 &pdd->proc_ctx_bo, 364 &pdd->proc_ctx_gpu_addr, 365 &pdd->proc_ctx_cpu_ptr, 366 false); 367 if (r) { 368 dev_err(adev->dev, 369 "failed to allocate process context bo\n"); 370 return r; 371 } 372 memset(pdd->proc_ctx_cpu_ptr, 0, AMDGPU_MES_PROC_CTX_SIZE); 373 } 374 375 return amdgpu_mes_set_shader_debugger(pdd->dev->adev, 376 pdd->proc_ctx_gpu_addr, spi_dbg_cntl, 377 pdd->watch_points, flags, sq_trap_en, 378 ffs(pdd->dev->xcc_mask) - 1); 379 } 380 381 #define KFD_DEBUGGER_INVALID_WATCH_POINT_ID -1 382 static int kfd_dbg_get_dev_watch_id(struct kfd_process_device *pdd, int *watch_id) 383 { 384 int i; 385 386 *watch_id = KFD_DEBUGGER_INVALID_WATCH_POINT_ID; 387 388 spin_lock(&pdd->dev->watch_points_lock); 389 390 for (i = 0; i < MAX_WATCH_ADDRESSES; i++) { 391 /* device watchpoint in use so skip */ 392 if ((pdd->dev->alloc_watch_ids >> i) & 0x1) 393 continue; 394 395 pdd->alloc_watch_ids |= 0x1 << i; 396 pdd->dev->alloc_watch_ids |= 0x1 << i; 397 *watch_id = i; 398 spin_unlock(&pdd->dev->watch_points_lock); 399 return 0; 400 } 401 402 spin_unlock(&pdd->dev->watch_points_lock); 403 404 return -ENOMEM; 405 } 406 407 static void kfd_dbg_clear_dev_watch_id(struct kfd_process_device *pdd, u32 watch_id) 408 { 409 spin_lock(&pdd->dev->watch_points_lock); 410 411 /* process owns device watch point so safe to clear */ 412 if (pdd->alloc_watch_ids & BIT(watch_id)) { 413 pdd->alloc_watch_ids &= ~BIT(watch_id); 414 pdd->dev->alloc_watch_ids &= ~BIT(watch_id); 415 } 416 417 spin_unlock(&pdd->dev->watch_points_lock); 418 } 419 420 static bool kfd_dbg_owns_dev_watch_id(struct kfd_process_device *pdd, u32 watch_id) 421 { 422 bool owns_watch_id = false; 423 424 spin_lock(&pdd->dev->watch_points_lock); 425 owns_watch_id = pdd->alloc_watch_ids & BIT(watch_id); 426 spin_unlock(&pdd->dev->watch_points_lock); 427 428 return owns_watch_id; 429 } 430 431 int kfd_dbg_trap_clear_dev_address_watch(struct kfd_process_device *pdd, 432 uint32_t watch_id) 433 { 434 int r; 435 436 if (watch_id >= MAX_WATCH_ADDRESSES) 437 return -EINVAL; 438 439 if (!kfd_dbg_owns_dev_watch_id(pdd, watch_id)) 440 return -EINVAL; 441 442 if (!pdd->dev->kfd->shared_resources.enable_mes) { 443 r = debug_lock_and_unmap(pdd->dev->dqm); 444 if (r) 445 return r; 446 } 447 448 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 449 pdd->watch_points[watch_id] = pdd->dev->kfd2kgd->clear_address_watch( 450 pdd->dev->adev, 451 watch_id); 452 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 453 454 if (!pdd->dev->kfd->shared_resources.enable_mes) 455 r = debug_map_and_unlock(pdd->dev->dqm); 456 else 457 r = kfd_dbg_set_mes_debug_mode(pdd, true); 458 459 kfd_dbg_clear_dev_watch_id(pdd, watch_id); 460 461 return r; 462 } 463 464 int kfd_dbg_trap_set_dev_address_watch(struct kfd_process_device *pdd, 465 uint64_t watch_address, 466 uint32_t watch_address_mask, 467 uint32_t *watch_id, 468 uint32_t watch_mode) 469 { 470 int xcc_id, r = kfd_dbg_get_dev_watch_id(pdd, watch_id); 471 uint32_t xcc_mask = pdd->dev->xcc_mask; 472 473 if (r) 474 return r; 475 476 if (*watch_id >= MAX_WATCH_ADDRESSES) 477 return -EINVAL; 478 479 if (!pdd->dev->kfd->shared_resources.enable_mes) { 480 r = debug_lock_and_unmap(pdd->dev->dqm); 481 if (r) { 482 kfd_dbg_clear_dev_watch_id(pdd, *watch_id); 483 return r; 484 } 485 } 486 487 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 488 for_each_inst(xcc_id, xcc_mask) 489 pdd->watch_points[*watch_id] = pdd->dev->kfd2kgd->set_address_watch( 490 pdd->dev->adev, 491 watch_address, 492 watch_address_mask, 493 *watch_id, 494 watch_mode, 495 pdd->dev->vm_info.last_vmid_kfd, 496 xcc_id); 497 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 498 499 if (!pdd->dev->kfd->shared_resources.enable_mes) 500 r = debug_map_and_unlock(pdd->dev->dqm); 501 else 502 r = kfd_dbg_set_mes_debug_mode(pdd, true); 503 504 /* HWS is broken so no point in HW rollback but release the watchpoint anyways */ 505 if (r) 506 kfd_dbg_clear_dev_watch_id(pdd, *watch_id); 507 508 return 0; 509 } 510 511 static void kfd_dbg_clear_process_address_watch(struct kfd_process *target) 512 { 513 int i, j; 514 515 for (i = 0; i < target->n_pdds; i++) 516 for (j = 0; j < MAX_WATCH_ADDRESSES; j++) 517 kfd_dbg_trap_clear_dev_address_watch(target->pdds[i], j); 518 } 519 520 int kfd_dbg_trap_set_flags(struct kfd_process *target, uint32_t *flags) 521 { 522 uint32_t prev_flags = target->dbg_flags; 523 int i, r = 0, rewind_count = 0; 524 525 for (i = 0; i < target->n_pdds; i++) { 526 struct kfd_topology_device *topo_dev = 527 kfd_topology_device_by_id(target->pdds[i]->dev->id); 528 uint32_t caps = topo_dev->node_props.capability; 529 uint32_t caps2 = topo_dev->node_props.capability2; 530 531 if (!(caps & HSA_CAP_TRAP_DEBUG_PRECISE_MEMORY_OPERATIONS_SUPPORTED) && 532 (*flags & KFD_DBG_TRAP_FLAG_SINGLE_MEM_OP)) { 533 *flags = prev_flags; 534 return -EACCES; 535 } 536 537 if (!(caps & HSA_CAP_TRAP_DEBUG_PRECISE_ALU_OPERATIONS_SUPPORTED) && 538 (*flags & KFD_DBG_TRAP_FLAG_SINGLE_ALU_OP)) { 539 *flags = prev_flags; 540 return -EACCES; 541 } 542 543 if (!(caps2 & HSA_CAP2_TRAP_DEBUG_LDS_OUT_OF_ADDR_RANGE_SUPPORTED) && 544 (*flags & KFD_DBG_TRAP_FLAG_LDS_OUT_OF_ADDR_RANGE)) { 545 *flags = prev_flags; 546 return -EACCES; 547 } 548 } 549 550 target->dbg_flags = *flags; 551 *flags = prev_flags; 552 for (i = 0; i < target->n_pdds; i++) { 553 struct kfd_process_device *pdd = target->pdds[i]; 554 555 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 556 continue; 557 558 if (!pdd->dev->kfd->shared_resources.enable_mes) 559 r = debug_refresh_runlist(pdd->dev->dqm); 560 else 561 r = kfd_dbg_set_mes_debug_mode(pdd, true); 562 563 if (r) { 564 target->dbg_flags = prev_flags; 565 break; 566 } 567 568 rewind_count++; 569 } 570 571 /* Rewind flags */ 572 if (r) { 573 target->dbg_flags = prev_flags; 574 575 for (i = 0; i < rewind_count; i++) { 576 struct kfd_process_device *pdd = target->pdds[i]; 577 578 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) 579 continue; 580 581 if (!pdd->dev->kfd->shared_resources.enable_mes) 582 (void)debug_refresh_runlist(pdd->dev->dqm); 583 else 584 (void)kfd_dbg_set_mes_debug_mode(pdd, true); 585 } 586 } 587 588 return r; 589 } 590 591 /* kfd_dbg_trap_deactivate: 592 * target: target process 593 * unwind: If this is unwinding a failed kfd_dbg_trap_enable() 594 * unwind_count: 595 * If unwind == true, how far down the pdd list we need 596 * to unwind 597 * else: ignored 598 */ 599 void kfd_dbg_trap_deactivate(struct kfd_process *target, bool unwind, int unwind_count) 600 { 601 int i; 602 603 if (!unwind) { 604 uint32_t flags = 0; 605 int resume_count = resume_queues(target, 0, NULL); 606 607 if (resume_count) 608 pr_debug("Resumed %d queues\n", resume_count); 609 610 cancel_work_sync(&target->debug_event_workarea); 611 kfd_dbg_clear_process_address_watch(target); 612 kfd_dbg_trap_set_wave_launch_mode(target, 0); 613 614 kfd_dbg_trap_set_flags(target, &flags); 615 } 616 617 for (i = 0; i < target->n_pdds; i++) { 618 struct kfd_process_device *pdd = target->pdds[i]; 619 620 /* If this is an unwind, and we have unwound the required 621 * enable calls on the pdd list, we need to stop now 622 * otherwise we may mess up another debugger session. 623 */ 624 if (unwind && i == unwind_count) 625 break; 626 627 kfd_process_set_trap_debug_flag(&pdd->qpd, false); 628 629 /* GFX off is already disabled by debug activate if not RLC restore supported. */ 630 if (kfd_dbg_is_rlc_restore_supported(pdd->dev)) 631 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 632 pdd->spi_dbg_override = 633 pdd->dev->kfd2kgd->disable_debug_trap( 634 pdd->dev->adev, 635 target->runtime_info.ttmp_setup, 636 pdd->dev->vm_info.last_vmid_kfd); 637 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 638 639 if (!kfd_dbg_is_per_vmid_supported(pdd->dev) && 640 release_debug_trap_vmid(pdd->dev->dqm, &pdd->qpd)) 641 pr_err("Failed to release debug vmid on [%i]\n", pdd->dev->id); 642 643 if (!pdd->dev->kfd->shared_resources.enable_mes) 644 (void)debug_refresh_runlist(pdd->dev->dqm); 645 else 646 (void)kfd_dbg_set_mes_debug_mode(pdd, 647 !kfd_dbg_has_cwsr_workaround(pdd->dev)); 648 } 649 650 kfd_dbg_set_workaround(target, false); 651 } 652 653 static void kfd_dbg_clean_exception_status(struct kfd_process *target) 654 { 655 struct process_queue_manager *pqm; 656 struct process_queue_node *pqn; 657 int i; 658 659 for (i = 0; i < target->n_pdds; i++) { 660 struct kfd_process_device *pdd = target->pdds[i]; 661 662 kfd_process_drain_interrupts(pdd); 663 664 pdd->exception_status = 0; 665 } 666 667 pqm = &target->pqm; 668 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 669 if (!pqn->q) 670 continue; 671 672 pqn->q->properties.exception_status = 0; 673 } 674 675 target->exception_status = 0; 676 } 677 678 int kfd_dbg_trap_disable(struct kfd_process *target) 679 { 680 if (!target->debug_trap_enabled) 681 return 0; 682 683 /* 684 * Defer deactivation to runtime if runtime not enabled otherwise reset 685 * attached running target runtime state to enable for re-attach. 686 */ 687 if (target->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) 688 kfd_dbg_trap_deactivate(target, false, 0); 689 else if (target->runtime_info.runtime_state != DEBUG_RUNTIME_STATE_DISABLED) 690 target->runtime_info.runtime_state = DEBUG_RUNTIME_STATE_ENABLED; 691 692 cancel_work_sync(&target->debug_event_workarea); 693 fput(target->dbg_ev_file); 694 target->dbg_ev_file = NULL; 695 696 if (target->debugger_process) { 697 atomic_dec(&target->debugger_process->debugged_process_count); 698 target->debugger_process = NULL; 699 } 700 701 target->debug_trap_enabled = false; 702 kfd_dbg_clean_exception_status(target); 703 kfd_unref_process(target); 704 705 return 0; 706 } 707 708 int kfd_dbg_trap_activate(struct kfd_process *target) 709 { 710 int i, r = 0; 711 712 r = kfd_dbg_set_workaround(target, true); 713 if (r) 714 return r; 715 716 for (i = 0; i < target->n_pdds; i++) { 717 struct kfd_process_device *pdd = target->pdds[i]; 718 719 if (!kfd_dbg_is_per_vmid_supported(pdd->dev)) { 720 r = reserve_debug_trap_vmid(pdd->dev->dqm, &pdd->qpd); 721 722 if (r) { 723 target->runtime_info.runtime_state = (r == -EBUSY) ? 724 DEBUG_RUNTIME_STATE_ENABLED_BUSY : 725 DEBUG_RUNTIME_STATE_ENABLED_ERROR; 726 727 goto unwind_err; 728 } 729 } 730 731 /* Disable GFX OFF to prevent garbage read/writes to debug registers. 732 * If RLC restore of debug registers is not supported and runtime enable 733 * hasn't done so already on ttmp setup request, restore the trap config registers. 734 * 735 * If RLC restore of debug registers is not supported, keep gfx off disabled for 736 * the debug session. 737 */ 738 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 739 if (!(kfd_dbg_is_rlc_restore_supported(pdd->dev) || 740 target->runtime_info.ttmp_setup)) 741 pdd->dev->kfd2kgd->enable_debug_trap(pdd->dev->adev, true, 742 pdd->dev->vm_info.last_vmid_kfd); 743 744 pdd->spi_dbg_override = pdd->dev->kfd2kgd->enable_debug_trap( 745 pdd->dev->adev, 746 false, 747 pdd->dev->vm_info.last_vmid_kfd); 748 749 if (kfd_dbg_is_rlc_restore_supported(pdd->dev)) 750 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 751 752 /* 753 * Setting the debug flag in the trap handler requires that the TMA has been 754 * allocated, which occurs during CWSR initialization. 755 * In the event that CWSR has not been initialized at this point, setting the 756 * flag will be called again during CWSR initialization if the target process 757 * is still debug enabled. 758 */ 759 kfd_process_set_trap_debug_flag(&pdd->qpd, true); 760 761 if (!pdd->dev->kfd->shared_resources.enable_mes) 762 r = debug_refresh_runlist(pdd->dev->dqm); 763 else 764 r = kfd_dbg_set_mes_debug_mode(pdd, true); 765 766 if (r) { 767 target->runtime_info.runtime_state = 768 DEBUG_RUNTIME_STATE_ENABLED_ERROR; 769 goto unwind_err; 770 } 771 } 772 773 return 0; 774 775 unwind_err: 776 /* Enabling debug failed, we need to disable on 777 * all GPUs so the enable is all or nothing. 778 */ 779 kfd_dbg_trap_deactivate(target, true, i); 780 return r; 781 } 782 783 int kfd_dbg_trap_enable(struct kfd_process *target, uint32_t fd, 784 void __user *runtime_info, uint32_t *runtime_size) 785 { 786 struct file *f; 787 uint32_t copy_size; 788 int i, r = 0; 789 790 if (target->debug_trap_enabled) 791 return -EALREADY; 792 793 /* Enable pre-checks */ 794 for (i = 0; i < target->n_pdds; i++) { 795 struct kfd_process_device *pdd = target->pdds[i]; 796 797 if (!KFD_IS_SOC15(pdd->dev)) 798 return -ENODEV; 799 800 if (pdd->qpd.num_gws && (!kfd_dbg_has_gws_support(pdd->dev) || 801 kfd_dbg_has_cwsr_workaround(pdd->dev))) 802 return -EBUSY; 803 } 804 805 copy_size = min((size_t)(*runtime_size), sizeof(target->runtime_info)); 806 807 f = fget(fd); 808 if (!f) { 809 pr_err("Failed to get file for (%i)\n", fd); 810 return -EBADF; 811 } 812 813 target->dbg_ev_file = f; 814 815 /* defer activation to runtime if not runtime enabled */ 816 if (target->runtime_info.runtime_state == DEBUG_RUNTIME_STATE_ENABLED) 817 kfd_dbg_trap_activate(target); 818 819 /* We already hold the process reference but hold another one for the 820 * debug session. 821 */ 822 kref_get(&target->ref); 823 target->debug_trap_enabled = true; 824 825 if (target->debugger_process) 826 atomic_inc(&target->debugger_process->debugged_process_count); 827 828 if (copy_to_user(runtime_info, (void *)&target->runtime_info, copy_size)) { 829 kfd_dbg_trap_deactivate(target, false, 0); 830 r = -EFAULT; 831 } 832 833 *runtime_size = sizeof(target->runtime_info); 834 835 return r; 836 } 837 838 static int kfd_dbg_validate_trap_override_request(struct kfd_process *p, 839 uint32_t trap_override, 840 uint32_t trap_mask_request, 841 uint32_t *trap_mask_supported) 842 { 843 int i = 0; 844 845 *trap_mask_supported = 0xffffffff; 846 847 for (i = 0; i < p->n_pdds; i++) { 848 struct kfd_process_device *pdd = p->pdds[i]; 849 int err = pdd->dev->kfd2kgd->validate_trap_override_request( 850 pdd->dev->adev, 851 trap_override, 852 trap_mask_supported); 853 854 if (err) 855 return err; 856 } 857 858 if (trap_mask_request & ~*trap_mask_supported) 859 return -EACCES; 860 861 return 0; 862 } 863 864 int kfd_dbg_trap_set_wave_launch_override(struct kfd_process *target, 865 uint32_t trap_override, 866 uint32_t trap_mask_bits, 867 uint32_t trap_mask_request, 868 uint32_t *trap_mask_prev, 869 uint32_t *trap_mask_supported) 870 { 871 int r = 0, i; 872 873 r = kfd_dbg_validate_trap_override_request(target, 874 trap_override, 875 trap_mask_request, 876 trap_mask_supported); 877 878 if (r) 879 return r; 880 881 for (i = 0; i < target->n_pdds; i++) { 882 struct kfd_process_device *pdd = target->pdds[i]; 883 884 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 885 pdd->spi_dbg_override = pdd->dev->kfd2kgd->set_wave_launch_trap_override( 886 pdd->dev->adev, 887 pdd->dev->vm_info.last_vmid_kfd, 888 trap_override, 889 trap_mask_bits, 890 trap_mask_request, 891 trap_mask_prev, 892 pdd->spi_dbg_override); 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_set_wave_launch_mode(struct kfd_process *target, 908 uint8_t wave_launch_mode) 909 { 910 int r = 0, i; 911 912 if (wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_NORMAL && 913 wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_HALT && 914 wave_launch_mode != KFD_DBG_TRAP_WAVE_LAUNCH_MODE_DEBUG) 915 return -EINVAL; 916 917 for (i = 0; i < target->n_pdds; i++) { 918 struct kfd_process_device *pdd = target->pdds[i]; 919 920 amdgpu_gfx_off_ctrl(pdd->dev->adev, false); 921 pdd->spi_dbg_launch_mode = pdd->dev->kfd2kgd->set_wave_launch_mode( 922 pdd->dev->adev, 923 wave_launch_mode, 924 pdd->dev->vm_info.last_vmid_kfd); 925 amdgpu_gfx_off_ctrl(pdd->dev->adev, true); 926 927 if (!pdd->dev->kfd->shared_resources.enable_mes) 928 r = debug_refresh_runlist(pdd->dev->dqm); 929 else 930 r = kfd_dbg_set_mes_debug_mode(pdd, true); 931 932 if (r) 933 break; 934 } 935 936 return r; 937 } 938 939 int kfd_dbg_trap_query_exception_info(struct kfd_process *target, 940 uint32_t source_id, 941 uint32_t exception_code, 942 bool clear_exception, 943 void __user *info, 944 uint32_t *info_size) 945 { 946 bool found = false; 947 int r = 0; 948 uint32_t copy_size, actual_info_size = 0; 949 uint64_t *exception_status_ptr = NULL; 950 951 if (!target) 952 return -EINVAL; 953 954 if (!info || !info_size) 955 return -EINVAL; 956 957 mutex_lock(&target->event_mutex); 958 959 if (KFD_DBG_EC_TYPE_IS_QUEUE(exception_code)) { 960 /* Per queue exceptions */ 961 struct queue *queue = NULL; 962 int i; 963 964 for (i = 0; i < target->n_pdds; i++) { 965 struct kfd_process_device *pdd = target->pdds[i]; 966 struct qcm_process_device *qpd = &pdd->qpd; 967 968 list_for_each_entry(queue, &qpd->queues_list, list) { 969 if (!found && queue->properties.queue_id == source_id) { 970 found = true; 971 break; 972 } 973 } 974 if (found) 975 break; 976 } 977 978 if (!found) { 979 r = -EINVAL; 980 goto out; 981 } 982 983 if (!(queue->properties.exception_status & KFD_EC_MASK(exception_code))) { 984 r = -ENODATA; 985 goto out; 986 } 987 exception_status_ptr = &queue->properties.exception_status; 988 } else if (KFD_DBG_EC_TYPE_IS_DEVICE(exception_code)) { 989 /* Per device exceptions */ 990 struct kfd_process_device *pdd = NULL; 991 int i; 992 993 for (i = 0; i < target->n_pdds; i++) { 994 pdd = target->pdds[i]; 995 if (pdd->dev->id == source_id) { 996 found = true; 997 break; 998 } 999 } 1000 1001 if (!found) { 1002 r = -EINVAL; 1003 goto out; 1004 } 1005 1006 if (!(pdd->exception_status & KFD_EC_MASK(exception_code))) { 1007 r = -ENODATA; 1008 goto out; 1009 } 1010 1011 if (exception_code == EC_DEVICE_MEMORY_VIOLATION) { 1012 copy_size = min((size_t)(*info_size), pdd->vm_fault_exc_data_size); 1013 1014 if (copy_to_user(info, pdd->vm_fault_exc_data, copy_size)) { 1015 r = -EFAULT; 1016 goto out; 1017 } 1018 actual_info_size = pdd->vm_fault_exc_data_size; 1019 if (clear_exception) { 1020 kfree(pdd->vm_fault_exc_data); 1021 pdd->vm_fault_exc_data = NULL; 1022 pdd->vm_fault_exc_data_size = 0; 1023 } 1024 } 1025 exception_status_ptr = &pdd->exception_status; 1026 } else if (KFD_DBG_EC_TYPE_IS_PROCESS(exception_code)) { 1027 /* Per process exceptions */ 1028 if (!(target->exception_status & KFD_EC_MASK(exception_code))) { 1029 r = -ENODATA; 1030 goto out; 1031 } 1032 1033 if (exception_code == EC_PROCESS_RUNTIME) { 1034 copy_size = min((size_t)(*info_size), sizeof(target->runtime_info)); 1035 1036 if (copy_to_user(info, (void *)&target->runtime_info, copy_size)) { 1037 r = -EFAULT; 1038 goto out; 1039 } 1040 1041 actual_info_size = sizeof(target->runtime_info); 1042 } 1043 1044 exception_status_ptr = &target->exception_status; 1045 } else { 1046 pr_debug("Bad exception type [%i]\n", exception_code); 1047 r = -EINVAL; 1048 goto out; 1049 } 1050 1051 *info_size = actual_info_size; 1052 if (clear_exception) 1053 *exception_status_ptr &= ~KFD_EC_MASK(exception_code); 1054 out: 1055 mutex_unlock(&target->event_mutex); 1056 return r; 1057 } 1058 1059 int kfd_dbg_trap_device_snapshot(struct kfd_process *target, 1060 uint64_t exception_clear_mask, 1061 void __user *user_info, 1062 uint32_t *number_of_device_infos, 1063 uint32_t *entry_size) 1064 { 1065 struct kfd_dbg_device_info_entry device_info; 1066 uint32_t tmp_entry_size, tmp_num_devices; 1067 int i, r = 0; 1068 1069 if (!(target && user_info && number_of_device_infos && entry_size)) 1070 return -EINVAL; 1071 1072 tmp_entry_size = *entry_size; 1073 1074 tmp_num_devices = min_t(size_t, *number_of_device_infos, target->n_pdds); 1075 *number_of_device_infos = target->n_pdds; 1076 *entry_size = min_t(size_t, *entry_size, sizeof(device_info)); 1077 1078 if (!tmp_num_devices) 1079 return 0; 1080 1081 memset(&device_info, 0, sizeof(device_info)); 1082 1083 mutex_lock(&target->event_mutex); 1084 1085 /* Run over all pdd of the process */ 1086 for (i = 0; i < tmp_num_devices; i++) { 1087 struct kfd_process_device *pdd = target->pdds[i]; 1088 struct kfd_topology_device *topo_dev = kfd_topology_device_by_id(pdd->dev->id); 1089 1090 device_info.gpu_id = pdd->dev->id; 1091 device_info.exception_status = pdd->exception_status; 1092 device_info.lds_base = pdd->lds_base; 1093 device_info.lds_limit = pdd->lds_limit; 1094 device_info.scratch_base = pdd->scratch_base; 1095 device_info.scratch_limit = pdd->scratch_limit; 1096 device_info.gpuvm_base = pdd->gpuvm_base; 1097 device_info.gpuvm_limit = pdd->gpuvm_limit; 1098 device_info.location_id = topo_dev->node_props.location_id; 1099 device_info.vendor_id = topo_dev->node_props.vendor_id; 1100 device_info.device_id = topo_dev->node_props.device_id; 1101 device_info.revision_id = pdd->dev->adev->pdev->revision; 1102 device_info.subsystem_vendor_id = pdd->dev->adev->pdev->subsystem_vendor; 1103 device_info.subsystem_device_id = pdd->dev->adev->pdev->subsystem_device; 1104 device_info.fw_version = pdd->dev->kfd->mec_fw_version; 1105 device_info.gfx_target_version = 1106 topo_dev->node_props.gfx_target_version; 1107 device_info.simd_count = topo_dev->node_props.simd_count; 1108 device_info.max_waves_per_simd = 1109 topo_dev->node_props.max_waves_per_simd; 1110 device_info.array_count = topo_dev->node_props.array_count; 1111 device_info.simd_arrays_per_engine = 1112 topo_dev->node_props.simd_arrays_per_engine; 1113 device_info.num_xcc = NUM_XCC(pdd->dev->xcc_mask); 1114 device_info.capability = topo_dev->node_props.capability; 1115 device_info.debug_prop = topo_dev->node_props.debug_prop; 1116 device_info.capability2 = topo_dev->node_props.capability2; 1117 1118 if (exception_clear_mask) 1119 pdd->exception_status &= ~exception_clear_mask; 1120 1121 if (copy_to_user(user_info, &device_info, *entry_size)) { 1122 r = -EFAULT; 1123 break; 1124 } 1125 1126 user_info += tmp_entry_size; 1127 } 1128 1129 mutex_unlock(&target->event_mutex); 1130 1131 return r; 1132 } 1133 1134 void kfd_dbg_set_enabled_debug_exception_mask(struct kfd_process *target, 1135 uint64_t exception_set_mask) 1136 { 1137 uint64_t found_mask = 0; 1138 struct process_queue_manager *pqm; 1139 struct process_queue_node *pqn; 1140 static const char write_data = '.'; 1141 loff_t pos = 0; 1142 int i; 1143 1144 mutex_lock(&target->event_mutex); 1145 1146 found_mask |= target->exception_status; 1147 1148 pqm = &target->pqm; 1149 list_for_each_entry(pqn, &pqm->queues, process_queue_list) { 1150 if (!pqn->q) 1151 continue; 1152 1153 found_mask |= pqn->q->properties.exception_status; 1154 } 1155 1156 for (i = 0; i < target->n_pdds; i++) { 1157 struct kfd_process_device *pdd = target->pdds[i]; 1158 1159 found_mask |= pdd->exception_status; 1160 } 1161 1162 if (exception_set_mask & found_mask) 1163 kernel_write(target->dbg_ev_file, &write_data, 1, &pos); 1164 1165 target->exception_enable_mask = exception_set_mask; 1166 1167 mutex_unlock(&target->event_mutex); 1168 } 1169