1 /* 2 * Copyright © 2016 Intel Corporation 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 (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #include <drm/drm_print.h> 26 27 #include "gem/i915_gem_context.h" 28 29 #include "i915_drv.h" 30 31 #include "intel_engine.h" 32 #include "intel_engine_pm.h" 33 #include "intel_context.h" 34 #include "intel_lrc.h" 35 #include "intel_reset.h" 36 37 /* Haswell does have the CXT_SIZE register however it does not appear to be 38 * valid. Now, docs explain in dwords what is in the context object. The full 39 * size is 70720 bytes, however, the power context and execlist context will 40 * never be saved (power context is stored elsewhere, and execlists don't work 41 * on HSW) - so the final size, including the extra state required for the 42 * Resource Streamer, is 66944 bytes, which rounds to 17 pages. 43 */ 44 #define HSW_CXT_TOTAL_SIZE (17 * PAGE_SIZE) 45 46 #define DEFAULT_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) 47 #define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE) 48 #define GEN9_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) 49 #define GEN10_LR_CONTEXT_RENDER_SIZE (18 * PAGE_SIZE) 50 #define GEN11_LR_CONTEXT_RENDER_SIZE (14 * PAGE_SIZE) 51 52 #define GEN8_LR_CONTEXT_OTHER_SIZE ( 2 * PAGE_SIZE) 53 54 struct engine_class_info { 55 const char *name; 56 u8 uabi_class; 57 }; 58 59 static const struct engine_class_info intel_engine_classes[] = { 60 [RENDER_CLASS] = { 61 .name = "rcs", 62 .uabi_class = I915_ENGINE_CLASS_RENDER, 63 }, 64 [COPY_ENGINE_CLASS] = { 65 .name = "bcs", 66 .uabi_class = I915_ENGINE_CLASS_COPY, 67 }, 68 [VIDEO_DECODE_CLASS] = { 69 .name = "vcs", 70 .uabi_class = I915_ENGINE_CLASS_VIDEO, 71 }, 72 [VIDEO_ENHANCEMENT_CLASS] = { 73 .name = "vecs", 74 .uabi_class = I915_ENGINE_CLASS_VIDEO_ENHANCE, 75 }, 76 }; 77 78 #define MAX_MMIO_BASES 3 79 struct engine_info { 80 unsigned int hw_id; 81 u8 class; 82 u8 instance; 83 /* mmio bases table *must* be sorted in reverse gen order */ 84 struct engine_mmio_base { 85 u32 gen : 8; 86 u32 base : 24; 87 } mmio_bases[MAX_MMIO_BASES]; 88 }; 89 90 static const struct engine_info intel_engines[] = { 91 [RCS0] = { 92 .hw_id = RCS0_HW, 93 .class = RENDER_CLASS, 94 .instance = 0, 95 .mmio_bases = { 96 { .gen = 1, .base = RENDER_RING_BASE } 97 }, 98 }, 99 [BCS0] = { 100 .hw_id = BCS0_HW, 101 .class = COPY_ENGINE_CLASS, 102 .instance = 0, 103 .mmio_bases = { 104 { .gen = 6, .base = BLT_RING_BASE } 105 }, 106 }, 107 [VCS0] = { 108 .hw_id = VCS0_HW, 109 .class = VIDEO_DECODE_CLASS, 110 .instance = 0, 111 .mmio_bases = { 112 { .gen = 11, .base = GEN11_BSD_RING_BASE }, 113 { .gen = 6, .base = GEN6_BSD_RING_BASE }, 114 { .gen = 4, .base = BSD_RING_BASE } 115 }, 116 }, 117 [VCS1] = { 118 .hw_id = VCS1_HW, 119 .class = VIDEO_DECODE_CLASS, 120 .instance = 1, 121 .mmio_bases = { 122 { .gen = 11, .base = GEN11_BSD2_RING_BASE }, 123 { .gen = 8, .base = GEN8_BSD2_RING_BASE } 124 }, 125 }, 126 [VCS2] = { 127 .hw_id = VCS2_HW, 128 .class = VIDEO_DECODE_CLASS, 129 .instance = 2, 130 .mmio_bases = { 131 { .gen = 11, .base = GEN11_BSD3_RING_BASE } 132 }, 133 }, 134 [VCS3] = { 135 .hw_id = VCS3_HW, 136 .class = VIDEO_DECODE_CLASS, 137 .instance = 3, 138 .mmio_bases = { 139 { .gen = 11, .base = GEN11_BSD4_RING_BASE } 140 }, 141 }, 142 [VECS0] = { 143 .hw_id = VECS0_HW, 144 .class = VIDEO_ENHANCEMENT_CLASS, 145 .instance = 0, 146 .mmio_bases = { 147 { .gen = 11, .base = GEN11_VEBOX_RING_BASE }, 148 { .gen = 7, .base = VEBOX_RING_BASE } 149 }, 150 }, 151 [VECS1] = { 152 .hw_id = VECS1_HW, 153 .class = VIDEO_ENHANCEMENT_CLASS, 154 .instance = 1, 155 .mmio_bases = { 156 { .gen = 11, .base = GEN11_VEBOX2_RING_BASE } 157 }, 158 }, 159 }; 160 161 /** 162 * intel_engine_context_size() - return the size of the context for an engine 163 * @dev_priv: i915 device private 164 * @class: engine class 165 * 166 * Each engine class may require a different amount of space for a context 167 * image. 168 * 169 * Return: size (in bytes) of an engine class specific context image 170 * 171 * Note: this size includes the HWSP, which is part of the context image 172 * in LRC mode, but does not include the "shared data page" used with 173 * GuC submission. The caller should account for this if using the GuC. 174 */ 175 u32 intel_engine_context_size(struct drm_i915_private *dev_priv, u8 class) 176 { 177 u32 cxt_size; 178 179 BUILD_BUG_ON(I915_GTT_PAGE_SIZE != PAGE_SIZE); 180 181 switch (class) { 182 case RENDER_CLASS: 183 switch (INTEL_GEN(dev_priv)) { 184 default: 185 MISSING_CASE(INTEL_GEN(dev_priv)); 186 return DEFAULT_LR_CONTEXT_RENDER_SIZE; 187 case 11: 188 return GEN11_LR_CONTEXT_RENDER_SIZE; 189 case 10: 190 return GEN10_LR_CONTEXT_RENDER_SIZE; 191 case 9: 192 return GEN9_LR_CONTEXT_RENDER_SIZE; 193 case 8: 194 return GEN8_LR_CONTEXT_RENDER_SIZE; 195 case 7: 196 if (IS_HASWELL(dev_priv)) 197 return HSW_CXT_TOTAL_SIZE; 198 199 cxt_size = I915_READ(GEN7_CXT_SIZE); 200 return round_up(GEN7_CXT_TOTAL_SIZE(cxt_size) * 64, 201 PAGE_SIZE); 202 case 6: 203 cxt_size = I915_READ(CXT_SIZE); 204 return round_up(GEN6_CXT_TOTAL_SIZE(cxt_size) * 64, 205 PAGE_SIZE); 206 case 5: 207 case 4: 208 /* 209 * There is a discrepancy here between the size reported 210 * by the register and the size of the context layout 211 * in the docs. Both are described as authorative! 212 * 213 * The discrepancy is on the order of a few cachelines, 214 * but the total is under one page (4k), which is our 215 * minimum allocation anyway so it should all come 216 * out in the wash. 217 */ 218 cxt_size = I915_READ(CXT_SIZE) + 1; 219 DRM_DEBUG_DRIVER("gen%d CXT_SIZE = %d bytes [0x%08x]\n", 220 INTEL_GEN(dev_priv), 221 cxt_size * 64, 222 cxt_size - 1); 223 return round_up(cxt_size * 64, PAGE_SIZE); 224 case 3: 225 case 2: 226 /* For the special day when i810 gets merged. */ 227 case 1: 228 return 0; 229 } 230 break; 231 default: 232 MISSING_CASE(class); 233 /* fall through */ 234 case VIDEO_DECODE_CLASS: 235 case VIDEO_ENHANCEMENT_CLASS: 236 case COPY_ENGINE_CLASS: 237 if (INTEL_GEN(dev_priv) < 8) 238 return 0; 239 return GEN8_LR_CONTEXT_OTHER_SIZE; 240 } 241 } 242 243 static u32 __engine_mmio_base(struct drm_i915_private *i915, 244 const struct engine_mmio_base *bases) 245 { 246 int i; 247 248 for (i = 0; i < MAX_MMIO_BASES; i++) 249 if (INTEL_GEN(i915) >= bases[i].gen) 250 break; 251 252 GEM_BUG_ON(i == MAX_MMIO_BASES); 253 GEM_BUG_ON(!bases[i].base); 254 255 return bases[i].base; 256 } 257 258 static void __sprint_engine_name(char *name, const struct engine_info *info) 259 { 260 WARN_ON(snprintf(name, INTEL_ENGINE_CS_MAX_NAME, "%s%u", 261 intel_engine_classes[info->class].name, 262 info->instance) >= INTEL_ENGINE_CS_MAX_NAME); 263 } 264 265 void intel_engine_set_hwsp_writemask(struct intel_engine_cs *engine, u32 mask) 266 { 267 /* 268 * Though they added more rings on g4x/ilk, they did not add 269 * per-engine HWSTAM until gen6. 270 */ 271 if (INTEL_GEN(engine->i915) < 6 && engine->class != RENDER_CLASS) 272 return; 273 274 if (INTEL_GEN(engine->i915) >= 3) 275 ENGINE_WRITE(engine, RING_HWSTAM, mask); 276 else 277 ENGINE_WRITE16(engine, RING_HWSTAM, mask); 278 } 279 280 static void intel_engine_sanitize_mmio(struct intel_engine_cs *engine) 281 { 282 /* Mask off all writes into the unknown HWSP */ 283 intel_engine_set_hwsp_writemask(engine, ~0u); 284 } 285 286 static int 287 intel_engine_setup(struct drm_i915_private *dev_priv, 288 enum intel_engine_id id) 289 { 290 const struct engine_info *info = &intel_engines[id]; 291 struct intel_engine_cs *engine; 292 293 GEM_BUG_ON(info->class >= ARRAY_SIZE(intel_engine_classes)); 294 295 BUILD_BUG_ON(MAX_ENGINE_CLASS >= BIT(GEN11_ENGINE_CLASS_WIDTH)); 296 BUILD_BUG_ON(MAX_ENGINE_INSTANCE >= BIT(GEN11_ENGINE_INSTANCE_WIDTH)); 297 298 if (GEM_DEBUG_WARN_ON(info->class > MAX_ENGINE_CLASS)) 299 return -EINVAL; 300 301 if (GEM_DEBUG_WARN_ON(info->instance > MAX_ENGINE_INSTANCE)) 302 return -EINVAL; 303 304 if (GEM_DEBUG_WARN_ON(dev_priv->engine_class[info->class][info->instance])) 305 return -EINVAL; 306 307 GEM_BUG_ON(dev_priv->engine[id]); 308 engine = kzalloc(sizeof(*engine), GFP_KERNEL); 309 if (!engine) 310 return -ENOMEM; 311 312 BUILD_BUG_ON(BITS_PER_TYPE(engine->mask) < I915_NUM_ENGINES); 313 314 engine->id = id; 315 engine->mask = BIT(id); 316 engine->i915 = dev_priv; 317 engine->uncore = &dev_priv->uncore; 318 __sprint_engine_name(engine->name, info); 319 engine->hw_id = engine->guc_id = info->hw_id; 320 engine->mmio_base = __engine_mmio_base(dev_priv, info->mmio_bases); 321 engine->class = info->class; 322 engine->instance = info->instance; 323 324 /* 325 * To be overridden by the backend on setup. However to facilitate 326 * cleanup on error during setup, we always provide the destroy vfunc. 327 */ 328 engine->destroy = (typeof(engine->destroy))kfree; 329 330 engine->uabi_class = intel_engine_classes[info->class].uabi_class; 331 332 engine->context_size = intel_engine_context_size(dev_priv, 333 engine->class); 334 if (WARN_ON(engine->context_size > BIT(20))) 335 engine->context_size = 0; 336 if (engine->context_size) 337 DRIVER_CAPS(dev_priv)->has_logical_contexts = true; 338 339 /* Nothing to do here, execute in order of dependencies */ 340 engine->schedule = NULL; 341 342 seqlock_init(&engine->stats.lock); 343 344 ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier); 345 346 /* Scrub mmio state on takeover */ 347 intel_engine_sanitize_mmio(engine); 348 349 dev_priv->engine_class[info->class][info->instance] = engine; 350 dev_priv->engine[id] = engine; 351 return 0; 352 } 353 354 static void __setup_engine_capabilities(struct intel_engine_cs *engine) 355 { 356 struct drm_i915_private *i915 = engine->i915; 357 358 if (engine->class == VIDEO_DECODE_CLASS) { 359 /* 360 * HEVC support is present on first engine instance 361 * before Gen11 and on all instances afterwards. 362 */ 363 if (INTEL_GEN(i915) >= 11 || 364 (INTEL_GEN(i915) >= 9 && engine->instance == 0)) 365 engine->uabi_capabilities |= 366 I915_VIDEO_CLASS_CAPABILITY_HEVC; 367 368 /* 369 * SFC block is present only on even logical engine 370 * instances. 371 */ 372 if ((INTEL_GEN(i915) >= 11 && 373 RUNTIME_INFO(i915)->vdbox_sfc_access & engine->mask) || 374 (INTEL_GEN(i915) >= 9 && engine->instance == 0)) 375 engine->uabi_capabilities |= 376 I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC; 377 } else if (engine->class == VIDEO_ENHANCEMENT_CLASS) { 378 if (INTEL_GEN(i915) >= 9) 379 engine->uabi_capabilities |= 380 I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC; 381 } 382 } 383 384 static void intel_setup_engine_capabilities(struct drm_i915_private *i915) 385 { 386 struct intel_engine_cs *engine; 387 enum intel_engine_id id; 388 389 for_each_engine(engine, i915, id) 390 __setup_engine_capabilities(engine); 391 } 392 393 /** 394 * intel_engines_cleanup() - free the resources allocated for Command Streamers 395 * @i915: the i915 devic 396 */ 397 void intel_engines_cleanup(struct drm_i915_private *i915) 398 { 399 struct intel_engine_cs *engine; 400 enum intel_engine_id id; 401 402 for_each_engine(engine, i915, id) { 403 engine->destroy(engine); 404 i915->engine[id] = NULL; 405 } 406 } 407 408 /** 409 * intel_engines_init_mmio() - allocate and prepare the Engine Command Streamers 410 * @i915: the i915 device 411 * 412 * Return: non-zero if the initialization failed. 413 */ 414 int intel_engines_init_mmio(struct drm_i915_private *i915) 415 { 416 struct intel_device_info *device_info = mkwrite_device_info(i915); 417 const unsigned int engine_mask = INTEL_INFO(i915)->engine_mask; 418 unsigned int mask = 0; 419 unsigned int i; 420 int err; 421 422 WARN_ON(engine_mask == 0); 423 WARN_ON(engine_mask & 424 GENMASK(BITS_PER_TYPE(mask) - 1, I915_NUM_ENGINES)); 425 426 if (i915_inject_load_failure()) 427 return -ENODEV; 428 429 for (i = 0; i < ARRAY_SIZE(intel_engines); i++) { 430 if (!HAS_ENGINE(i915, i)) 431 continue; 432 433 err = intel_engine_setup(i915, i); 434 if (err) 435 goto cleanup; 436 437 mask |= BIT(i); 438 } 439 440 /* 441 * Catch failures to update intel_engines table when the new engines 442 * are added to the driver by a warning and disabling the forgotten 443 * engines. 444 */ 445 if (WARN_ON(mask != engine_mask)) 446 device_info->engine_mask = mask; 447 448 /* We always presume we have at least RCS available for later probing */ 449 if (WARN_ON(!HAS_ENGINE(i915, RCS0))) { 450 err = -ENODEV; 451 goto cleanup; 452 } 453 454 RUNTIME_INFO(i915)->num_engines = hweight32(mask); 455 456 i915_check_and_clear_faults(i915); 457 458 intel_setup_engine_capabilities(i915); 459 460 return 0; 461 462 cleanup: 463 intel_engines_cleanup(i915); 464 return err; 465 } 466 467 /** 468 * intel_engines_init() - init the Engine Command Streamers 469 * @i915: i915 device private 470 * 471 * Return: non-zero if the initialization failed. 472 */ 473 int intel_engines_init(struct drm_i915_private *i915) 474 { 475 int (*init)(struct intel_engine_cs *engine); 476 struct intel_engine_cs *engine; 477 enum intel_engine_id id; 478 int err; 479 480 if (HAS_EXECLISTS(i915)) 481 init = intel_execlists_submission_init; 482 else 483 init = intel_ring_submission_init; 484 485 for_each_engine(engine, i915, id) { 486 err = init(engine); 487 if (err) 488 goto cleanup; 489 } 490 491 return 0; 492 493 cleanup: 494 intel_engines_cleanup(i915); 495 return err; 496 } 497 498 static void intel_engine_init_batch_pool(struct intel_engine_cs *engine) 499 { 500 i915_gem_batch_pool_init(&engine->batch_pool, engine); 501 } 502 503 void intel_engine_init_execlists(struct intel_engine_cs *engine) 504 { 505 struct intel_engine_execlists * const execlists = &engine->execlists; 506 507 execlists->port_mask = 1; 508 GEM_BUG_ON(!is_power_of_2(execlists_num_ports(execlists))); 509 GEM_BUG_ON(execlists_num_ports(execlists) > EXECLIST_MAX_PORTS); 510 511 execlists->queue_priority_hint = INT_MIN; 512 execlists->queue = RB_ROOT_CACHED; 513 } 514 515 static void cleanup_status_page(struct intel_engine_cs *engine) 516 { 517 struct i915_vma *vma; 518 519 /* Prevent writes into HWSP after returning the page to the system */ 520 intel_engine_set_hwsp_writemask(engine, ~0u); 521 522 vma = fetch_and_zero(&engine->status_page.vma); 523 if (!vma) 524 return; 525 526 if (!HWS_NEEDS_PHYSICAL(engine->i915)) 527 i915_vma_unpin(vma); 528 529 i915_gem_object_unpin_map(vma->obj); 530 i915_gem_object_put(vma->obj); 531 } 532 533 static int pin_ggtt_status_page(struct intel_engine_cs *engine, 534 struct i915_vma *vma) 535 { 536 unsigned int flags; 537 538 flags = PIN_GLOBAL; 539 if (!HAS_LLC(engine->i915)) 540 /* 541 * On g33, we cannot place HWS above 256MiB, so 542 * restrict its pinning to the low mappable arena. 543 * Though this restriction is not documented for 544 * gen4, gen5, or byt, they also behave similarly 545 * and hang if the HWS is placed at the top of the 546 * GTT. To generalise, it appears that all !llc 547 * platforms have issues with us placing the HWS 548 * above the mappable region (even though we never 549 * actually map it). 550 */ 551 flags |= PIN_MAPPABLE; 552 else 553 flags |= PIN_HIGH; 554 555 return i915_vma_pin(vma, 0, 0, flags); 556 } 557 558 static int init_status_page(struct intel_engine_cs *engine) 559 { 560 struct drm_i915_gem_object *obj; 561 struct i915_vma *vma; 562 void *vaddr; 563 int ret; 564 565 /* 566 * Though the HWS register does support 36bit addresses, historically 567 * we have had hangs and corruption reported due to wild writes if 568 * the HWS is placed above 4G. We only allow objects to be allocated 569 * in GFP_DMA32 for i965, and no earlier physical address users had 570 * access to more than 4G. 571 */ 572 obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE); 573 if (IS_ERR(obj)) { 574 DRM_ERROR("Failed to allocate status page\n"); 575 return PTR_ERR(obj); 576 } 577 578 i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC); 579 580 vma = i915_vma_instance(obj, &engine->i915->ggtt.vm, NULL); 581 if (IS_ERR(vma)) { 582 ret = PTR_ERR(vma); 583 goto err; 584 } 585 586 vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB); 587 if (IS_ERR(vaddr)) { 588 ret = PTR_ERR(vaddr); 589 goto err; 590 } 591 592 engine->status_page.addr = memset(vaddr, 0, PAGE_SIZE); 593 engine->status_page.vma = vma; 594 595 if (!HWS_NEEDS_PHYSICAL(engine->i915)) { 596 ret = pin_ggtt_status_page(engine, vma); 597 if (ret) 598 goto err_unpin; 599 } 600 601 return 0; 602 603 err_unpin: 604 i915_gem_object_unpin_map(obj); 605 err: 606 i915_gem_object_put(obj); 607 return ret; 608 } 609 610 static int intel_engine_setup_common(struct intel_engine_cs *engine) 611 { 612 int err; 613 614 init_llist_head(&engine->barrier_tasks); 615 616 err = init_status_page(engine); 617 if (err) 618 return err; 619 620 intel_engine_init_active(engine, ENGINE_PHYSICAL); 621 intel_engine_init_breadcrumbs(engine); 622 intel_engine_init_execlists(engine); 623 intel_engine_init_hangcheck(engine); 624 intel_engine_init_batch_pool(engine); 625 intel_engine_init_cmd_parser(engine); 626 intel_engine_init__pm(engine); 627 628 /* Use the whole device by default */ 629 engine->sseu = 630 intel_sseu_from_device_info(&RUNTIME_INFO(engine->i915)->sseu); 631 632 return 0; 633 } 634 635 /** 636 * intel_engines_setup- setup engine state not requiring hw access 637 * @i915: Device to setup. 638 * 639 * Initializes engine structure members shared between legacy and execlists 640 * submission modes which do not require hardware access. 641 * 642 * Typically done early in the submission mode specific engine setup stage. 643 */ 644 int intel_engines_setup(struct drm_i915_private *i915) 645 { 646 int (*setup)(struct intel_engine_cs *engine); 647 struct intel_engine_cs *engine; 648 enum intel_engine_id id; 649 int err; 650 651 if (HAS_EXECLISTS(i915)) 652 setup = intel_execlists_submission_setup; 653 else 654 setup = intel_ring_submission_setup; 655 656 for_each_engine(engine, i915, id) { 657 err = intel_engine_setup_common(engine); 658 if (err) 659 goto cleanup; 660 661 err = setup(engine); 662 if (err) 663 goto cleanup; 664 665 /* We expect the backend to take control over its state */ 666 GEM_BUG_ON(engine->destroy == (typeof(engine->destroy))kfree); 667 668 GEM_BUG_ON(!engine->cops); 669 } 670 671 return 0; 672 673 cleanup: 674 intel_engines_cleanup(i915); 675 return err; 676 } 677 678 void intel_engines_set_scheduler_caps(struct drm_i915_private *i915) 679 { 680 static const struct { 681 u8 engine; 682 u8 sched; 683 } map[] = { 684 #define MAP(x, y) { ilog2(I915_ENGINE_HAS_##x), ilog2(I915_SCHEDULER_CAP_##y) } 685 MAP(PREEMPTION, PREEMPTION), 686 MAP(SEMAPHORES, SEMAPHORES), 687 #undef MAP 688 }; 689 struct intel_engine_cs *engine; 690 enum intel_engine_id id; 691 u32 enabled, disabled; 692 693 enabled = 0; 694 disabled = 0; 695 for_each_engine(engine, i915, id) { /* all engines must agree! */ 696 int i; 697 698 if (engine->schedule) 699 enabled |= (I915_SCHEDULER_CAP_ENABLED | 700 I915_SCHEDULER_CAP_PRIORITY); 701 else 702 disabled |= (I915_SCHEDULER_CAP_ENABLED | 703 I915_SCHEDULER_CAP_PRIORITY); 704 705 for (i = 0; i < ARRAY_SIZE(map); i++) { 706 if (engine->flags & BIT(map[i].engine)) 707 enabled |= BIT(map[i].sched); 708 else 709 disabled |= BIT(map[i].sched); 710 } 711 } 712 713 i915->caps.scheduler = enabled & ~disabled; 714 if (!(i915->caps.scheduler & I915_SCHEDULER_CAP_ENABLED)) 715 i915->caps.scheduler = 0; 716 } 717 718 struct measure_breadcrumb { 719 struct i915_request rq; 720 struct i915_timeline timeline; 721 struct intel_ring ring; 722 u32 cs[1024]; 723 }; 724 725 static int measure_breadcrumb_dw(struct intel_engine_cs *engine) 726 { 727 struct measure_breadcrumb *frame; 728 int dw = -ENOMEM; 729 730 GEM_BUG_ON(!engine->i915->gt.scratch); 731 732 frame = kzalloc(sizeof(*frame), GFP_KERNEL); 733 if (!frame) 734 return -ENOMEM; 735 736 if (i915_timeline_init(engine->i915, 737 &frame->timeline, 738 engine->status_page.vma)) 739 goto out_frame; 740 741 INIT_LIST_HEAD(&frame->ring.request_list); 742 frame->ring.timeline = &frame->timeline; 743 frame->ring.vaddr = frame->cs; 744 frame->ring.size = sizeof(frame->cs); 745 frame->ring.effective_size = frame->ring.size; 746 intel_ring_update_space(&frame->ring); 747 748 frame->rq.i915 = engine->i915; 749 frame->rq.engine = engine; 750 frame->rq.ring = &frame->ring; 751 frame->rq.timeline = &frame->timeline; 752 753 dw = i915_timeline_pin(&frame->timeline); 754 if (dw < 0) 755 goto out_timeline; 756 757 dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs; 758 GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */ 759 760 i915_timeline_unpin(&frame->timeline); 761 762 out_timeline: 763 i915_timeline_fini(&frame->timeline); 764 out_frame: 765 kfree(frame); 766 return dw; 767 } 768 769 static int pin_context(struct i915_gem_context *ctx, 770 struct intel_engine_cs *engine, 771 struct intel_context **out) 772 { 773 struct intel_context *ce; 774 int err; 775 776 ce = i915_gem_context_get_engine(ctx, engine->id); 777 if (IS_ERR(ce)) 778 return PTR_ERR(ce); 779 780 err = intel_context_pin(ce); 781 intel_context_put(ce); 782 if (err) 783 return err; 784 785 *out = ce; 786 return 0; 787 } 788 789 void 790 intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass) 791 { 792 INIT_LIST_HEAD(&engine->active.requests); 793 794 spin_lock_init(&engine->active.lock); 795 lockdep_set_subclass(&engine->active.lock, subclass); 796 797 /* 798 * Due to an interesting quirk in lockdep's internal debug tracking, 799 * after setting a subclass we must ensure the lock is used. Otherwise, 800 * nr_unused_locks is incremented once too often. 801 */ 802 #ifdef CONFIG_DEBUG_LOCK_ALLOC 803 local_irq_disable(); 804 lock_map_acquire(&engine->active.lock.dep_map); 805 lock_map_release(&engine->active.lock.dep_map); 806 local_irq_enable(); 807 #endif 808 } 809 810 /** 811 * intel_engines_init_common - initialize cengine state which might require hw access 812 * @engine: Engine to initialize. 813 * 814 * Initializes @engine@ structure members shared between legacy and execlists 815 * submission modes which do require hardware access. 816 * 817 * Typcally done at later stages of submission mode specific engine setup. 818 * 819 * Returns zero on success or an error code on failure. 820 */ 821 int intel_engine_init_common(struct intel_engine_cs *engine) 822 { 823 struct drm_i915_private *i915 = engine->i915; 824 int ret; 825 826 /* We may need to do things with the shrinker which 827 * require us to immediately switch back to the default 828 * context. This can cause a problem as pinning the 829 * default context also requires GTT space which may not 830 * be available. To avoid this we always pin the default 831 * context. 832 */ 833 ret = pin_context(i915->kernel_context, engine, 834 &engine->kernel_context); 835 if (ret) 836 return ret; 837 838 /* 839 * Similarly the preempt context must always be available so that 840 * we can interrupt the engine at any time. However, as preemption 841 * is optional, we allow it to fail. 842 */ 843 if (i915->preempt_context) 844 pin_context(i915->preempt_context, engine, 845 &engine->preempt_context); 846 847 ret = measure_breadcrumb_dw(engine); 848 if (ret < 0) 849 goto err_unpin; 850 851 engine->emit_fini_breadcrumb_dw = ret; 852 853 engine->set_default_submission(engine); 854 855 return 0; 856 857 err_unpin: 858 if (engine->preempt_context) 859 intel_context_unpin(engine->preempt_context); 860 intel_context_unpin(engine->kernel_context); 861 return ret; 862 } 863 864 /** 865 * intel_engines_cleanup_common - cleans up the engine state created by 866 * the common initiailizers. 867 * @engine: Engine to cleanup. 868 * 869 * This cleans up everything created by the common helpers. 870 */ 871 void intel_engine_cleanup_common(struct intel_engine_cs *engine) 872 { 873 GEM_BUG_ON(!list_empty(&engine->active.requests)); 874 875 cleanup_status_page(engine); 876 877 intel_engine_fini_breadcrumbs(engine); 878 intel_engine_cleanup_cmd_parser(engine); 879 i915_gem_batch_pool_fini(&engine->batch_pool); 880 881 if (engine->default_state) 882 i915_gem_object_put(engine->default_state); 883 884 if (engine->preempt_context) 885 intel_context_unpin(engine->preempt_context); 886 intel_context_unpin(engine->kernel_context); 887 GEM_BUG_ON(!llist_empty(&engine->barrier_tasks)); 888 889 intel_wa_list_free(&engine->ctx_wa_list); 890 intel_wa_list_free(&engine->wa_list); 891 intel_wa_list_free(&engine->whitelist); 892 } 893 894 u64 intel_engine_get_active_head(const struct intel_engine_cs *engine) 895 { 896 struct drm_i915_private *i915 = engine->i915; 897 898 u64 acthd; 899 900 if (INTEL_GEN(i915) >= 8) 901 acthd = ENGINE_READ64(engine, RING_ACTHD, RING_ACTHD_UDW); 902 else if (INTEL_GEN(i915) >= 4) 903 acthd = ENGINE_READ(engine, RING_ACTHD); 904 else 905 acthd = ENGINE_READ(engine, ACTHD); 906 907 return acthd; 908 } 909 910 u64 intel_engine_get_last_batch_head(const struct intel_engine_cs *engine) 911 { 912 u64 bbaddr; 913 914 if (INTEL_GEN(engine->i915) >= 8) 915 bbaddr = ENGINE_READ64(engine, RING_BBADDR, RING_BBADDR_UDW); 916 else 917 bbaddr = ENGINE_READ(engine, RING_BBADDR); 918 919 return bbaddr; 920 } 921 922 int intel_engine_stop_cs(struct intel_engine_cs *engine) 923 { 924 struct intel_uncore *uncore = engine->uncore; 925 const u32 base = engine->mmio_base; 926 const i915_reg_t mode = RING_MI_MODE(base); 927 int err; 928 929 if (INTEL_GEN(engine->i915) < 3) 930 return -ENODEV; 931 932 GEM_TRACE("%s\n", engine->name); 933 934 intel_uncore_write_fw(uncore, mode, _MASKED_BIT_ENABLE(STOP_RING)); 935 936 err = 0; 937 if (__intel_wait_for_register_fw(uncore, 938 mode, MODE_IDLE, MODE_IDLE, 939 1000, 0, 940 NULL)) { 941 GEM_TRACE("%s: timed out on STOP_RING -> IDLE\n", engine->name); 942 err = -ETIMEDOUT; 943 } 944 945 /* A final mmio read to let GPU writes be hopefully flushed to memory */ 946 intel_uncore_posting_read_fw(uncore, mode); 947 948 return err; 949 } 950 951 void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine) 952 { 953 GEM_TRACE("%s\n", engine->name); 954 955 ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING)); 956 } 957 958 const char *i915_cache_level_str(struct drm_i915_private *i915, int type) 959 { 960 switch (type) { 961 case I915_CACHE_NONE: return " uncached"; 962 case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped"; 963 case I915_CACHE_L3_LLC: return " L3+LLC"; 964 case I915_CACHE_WT: return " WT"; 965 default: return ""; 966 } 967 } 968 969 u32 intel_calculate_mcr_s_ss_select(struct drm_i915_private *dev_priv) 970 { 971 const struct sseu_dev_info *sseu = &RUNTIME_INFO(dev_priv)->sseu; 972 unsigned int slice = fls(sseu->slice_mask) - 1; 973 unsigned int subslice; 974 u32 mcr_s_ss_select; 975 976 GEM_BUG_ON(slice >= ARRAY_SIZE(sseu->subslice_mask)); 977 subslice = fls(sseu->subslice_mask[slice]); 978 GEM_BUG_ON(!subslice); 979 subslice--; 980 981 if (IS_GEN(dev_priv, 10)) 982 mcr_s_ss_select = GEN8_MCR_SLICE(slice) | 983 GEN8_MCR_SUBSLICE(subslice); 984 else if (INTEL_GEN(dev_priv) >= 11) 985 mcr_s_ss_select = GEN11_MCR_SLICE(slice) | 986 GEN11_MCR_SUBSLICE(subslice); 987 else 988 mcr_s_ss_select = 0; 989 990 return mcr_s_ss_select; 991 } 992 993 static u32 994 read_subslice_reg(struct intel_engine_cs *engine, int slice, int subslice, 995 i915_reg_t reg) 996 { 997 struct drm_i915_private *i915 = engine->i915; 998 struct intel_uncore *uncore = engine->uncore; 999 u32 mcr_slice_subslice_mask; 1000 u32 mcr_slice_subslice_select; 1001 u32 default_mcr_s_ss_select; 1002 u32 mcr; 1003 u32 ret; 1004 enum forcewake_domains fw_domains; 1005 1006 if (INTEL_GEN(i915) >= 11) { 1007 mcr_slice_subslice_mask = GEN11_MCR_SLICE_MASK | 1008 GEN11_MCR_SUBSLICE_MASK; 1009 mcr_slice_subslice_select = GEN11_MCR_SLICE(slice) | 1010 GEN11_MCR_SUBSLICE(subslice); 1011 } else { 1012 mcr_slice_subslice_mask = GEN8_MCR_SLICE_MASK | 1013 GEN8_MCR_SUBSLICE_MASK; 1014 mcr_slice_subslice_select = GEN8_MCR_SLICE(slice) | 1015 GEN8_MCR_SUBSLICE(subslice); 1016 } 1017 1018 default_mcr_s_ss_select = intel_calculate_mcr_s_ss_select(i915); 1019 1020 fw_domains = intel_uncore_forcewake_for_reg(uncore, reg, 1021 FW_REG_READ); 1022 fw_domains |= intel_uncore_forcewake_for_reg(uncore, 1023 GEN8_MCR_SELECTOR, 1024 FW_REG_READ | FW_REG_WRITE); 1025 1026 spin_lock_irq(&uncore->lock); 1027 intel_uncore_forcewake_get__locked(uncore, fw_domains); 1028 1029 mcr = intel_uncore_read_fw(uncore, GEN8_MCR_SELECTOR); 1030 1031 WARN_ON_ONCE((mcr & mcr_slice_subslice_mask) != 1032 default_mcr_s_ss_select); 1033 1034 mcr &= ~mcr_slice_subslice_mask; 1035 mcr |= mcr_slice_subslice_select; 1036 intel_uncore_write_fw(uncore, GEN8_MCR_SELECTOR, mcr); 1037 1038 ret = intel_uncore_read_fw(uncore, reg); 1039 1040 mcr &= ~mcr_slice_subslice_mask; 1041 mcr |= default_mcr_s_ss_select; 1042 1043 intel_uncore_write_fw(uncore, GEN8_MCR_SELECTOR, mcr); 1044 1045 intel_uncore_forcewake_put__locked(uncore, fw_domains); 1046 spin_unlock_irq(&uncore->lock); 1047 1048 return ret; 1049 } 1050 1051 /* NB: please notice the memset */ 1052 void intel_engine_get_instdone(struct intel_engine_cs *engine, 1053 struct intel_instdone *instdone) 1054 { 1055 struct drm_i915_private *i915 = engine->i915; 1056 struct intel_uncore *uncore = engine->uncore; 1057 u32 mmio_base = engine->mmio_base; 1058 int slice; 1059 int subslice; 1060 1061 memset(instdone, 0, sizeof(*instdone)); 1062 1063 switch (INTEL_GEN(i915)) { 1064 default: 1065 instdone->instdone = 1066 intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); 1067 1068 if (engine->id != RCS0) 1069 break; 1070 1071 instdone->slice_common = 1072 intel_uncore_read(uncore, GEN7_SC_INSTDONE); 1073 for_each_instdone_slice_subslice(i915, slice, subslice) { 1074 instdone->sampler[slice][subslice] = 1075 read_subslice_reg(engine, slice, subslice, 1076 GEN7_SAMPLER_INSTDONE); 1077 instdone->row[slice][subslice] = 1078 read_subslice_reg(engine, slice, subslice, 1079 GEN7_ROW_INSTDONE); 1080 } 1081 break; 1082 case 7: 1083 instdone->instdone = 1084 intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); 1085 1086 if (engine->id != RCS0) 1087 break; 1088 1089 instdone->slice_common = 1090 intel_uncore_read(uncore, GEN7_SC_INSTDONE); 1091 instdone->sampler[0][0] = 1092 intel_uncore_read(uncore, GEN7_SAMPLER_INSTDONE); 1093 instdone->row[0][0] = 1094 intel_uncore_read(uncore, GEN7_ROW_INSTDONE); 1095 1096 break; 1097 case 6: 1098 case 5: 1099 case 4: 1100 instdone->instdone = 1101 intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); 1102 if (engine->id == RCS0) 1103 /* HACK: Using the wrong struct member */ 1104 instdone->slice_common = 1105 intel_uncore_read(uncore, GEN4_INSTDONE1); 1106 break; 1107 case 3: 1108 case 2: 1109 instdone->instdone = intel_uncore_read(uncore, GEN2_INSTDONE); 1110 break; 1111 } 1112 } 1113 1114 static bool ring_is_idle(struct intel_engine_cs *engine) 1115 { 1116 struct drm_i915_private *dev_priv = engine->i915; 1117 intel_wakeref_t wakeref; 1118 bool idle = true; 1119 1120 if (I915_SELFTEST_ONLY(!engine->mmio_base)) 1121 return true; 1122 1123 /* If the whole device is asleep, the engine must be idle */ 1124 wakeref = intel_runtime_pm_get_if_in_use(&dev_priv->runtime_pm); 1125 if (!wakeref) 1126 return true; 1127 1128 /* First check that no commands are left in the ring */ 1129 if ((ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR) != 1130 (ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR)) 1131 idle = false; 1132 1133 /* No bit for gen2, so assume the CS parser is idle */ 1134 if (INTEL_GEN(dev_priv) > 2 && 1135 !(ENGINE_READ(engine, RING_MI_MODE) & MODE_IDLE)) 1136 idle = false; 1137 1138 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 1139 1140 return idle; 1141 } 1142 1143 /** 1144 * intel_engine_is_idle() - Report if the engine has finished process all work 1145 * @engine: the intel_engine_cs 1146 * 1147 * Return true if there are no requests pending, nothing left to be submitted 1148 * to hardware, and that the engine is idle. 1149 */ 1150 bool intel_engine_is_idle(struct intel_engine_cs *engine) 1151 { 1152 /* More white lies, if wedged, hw state is inconsistent */ 1153 if (i915_reset_failed(engine->i915)) 1154 return true; 1155 1156 if (!intel_wakeref_active(&engine->wakeref)) 1157 return true; 1158 1159 /* Waiting to drain ELSP? */ 1160 if (READ_ONCE(engine->execlists.active)) { 1161 struct tasklet_struct *t = &engine->execlists.tasklet; 1162 1163 synchronize_hardirq(engine->i915->drm.irq); 1164 1165 local_bh_disable(); 1166 if (tasklet_trylock(t)) { 1167 /* Must wait for any GPU reset in progress. */ 1168 if (__tasklet_is_enabled(t)) 1169 t->func(t->data); 1170 tasklet_unlock(t); 1171 } 1172 local_bh_enable(); 1173 1174 /* Otherwise flush the tasklet if it was on another cpu */ 1175 tasklet_unlock_wait(t); 1176 1177 if (READ_ONCE(engine->execlists.active)) 1178 return false; 1179 } 1180 1181 /* ELSP is empty, but there are ready requests? E.g. after reset */ 1182 if (!RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)) 1183 return false; 1184 1185 /* Ring stopped? */ 1186 return ring_is_idle(engine); 1187 } 1188 1189 bool intel_engines_are_idle(struct drm_i915_private *i915) 1190 { 1191 struct intel_engine_cs *engine; 1192 enum intel_engine_id id; 1193 1194 /* 1195 * If the driver is wedged, HW state may be very inconsistent and 1196 * report that it is still busy, even though we have stopped using it. 1197 */ 1198 if (i915_reset_failed(i915)) 1199 return true; 1200 1201 /* Already parked (and passed an idleness test); must still be idle */ 1202 if (!READ_ONCE(i915->gt.awake)) 1203 return true; 1204 1205 for_each_engine(engine, i915, id) { 1206 if (!intel_engine_is_idle(engine)) 1207 return false; 1208 } 1209 1210 return true; 1211 } 1212 1213 void intel_engines_reset_default_submission(struct drm_i915_private *i915) 1214 { 1215 struct intel_engine_cs *engine; 1216 enum intel_engine_id id; 1217 1218 for_each_engine(engine, i915, id) 1219 engine->set_default_submission(engine); 1220 } 1221 1222 bool intel_engine_can_store_dword(struct intel_engine_cs *engine) 1223 { 1224 switch (INTEL_GEN(engine->i915)) { 1225 case 2: 1226 return false; /* uses physical not virtual addresses */ 1227 case 3: 1228 /* maybe only uses physical not virtual addresses */ 1229 return !(IS_I915G(engine->i915) || IS_I915GM(engine->i915)); 1230 case 6: 1231 return engine->class != VIDEO_DECODE_CLASS; /* b0rked */ 1232 default: 1233 return true; 1234 } 1235 } 1236 1237 unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915) 1238 { 1239 struct intel_engine_cs *engine; 1240 enum intel_engine_id id; 1241 unsigned int which; 1242 1243 which = 0; 1244 for_each_engine(engine, i915, id) 1245 if (engine->default_state) 1246 which |= BIT(engine->uabi_class); 1247 1248 return which; 1249 } 1250 1251 static int print_sched_attr(struct drm_i915_private *i915, 1252 const struct i915_sched_attr *attr, 1253 char *buf, int x, int len) 1254 { 1255 if (attr->priority == I915_PRIORITY_INVALID) 1256 return x; 1257 1258 x += snprintf(buf + x, len - x, 1259 " prio=%d", attr->priority); 1260 1261 return x; 1262 } 1263 1264 static void print_request(struct drm_printer *m, 1265 struct i915_request *rq, 1266 const char *prefix) 1267 { 1268 const char *name = rq->fence.ops->get_timeline_name(&rq->fence); 1269 char buf[80] = ""; 1270 int x = 0; 1271 1272 x = print_sched_attr(rq->i915, &rq->sched.attr, buf, x, sizeof(buf)); 1273 1274 drm_printf(m, "%s %llx:%llx%s%s %s @ %dms: %s\n", 1275 prefix, 1276 rq->fence.context, rq->fence.seqno, 1277 i915_request_completed(rq) ? "!" : 1278 i915_request_started(rq) ? "*" : 1279 "", 1280 test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, 1281 &rq->fence.flags) ? "+" : 1282 test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, 1283 &rq->fence.flags) ? "-" : 1284 "", 1285 buf, 1286 jiffies_to_msecs(jiffies - rq->emitted_jiffies), 1287 name); 1288 } 1289 1290 static void hexdump(struct drm_printer *m, const void *buf, size_t len) 1291 { 1292 const size_t rowsize = 8 * sizeof(u32); 1293 const void *prev = NULL; 1294 bool skip = false; 1295 size_t pos; 1296 1297 for (pos = 0; pos < len; pos += rowsize) { 1298 char line[128]; 1299 1300 if (prev && !memcmp(prev, buf + pos, rowsize)) { 1301 if (!skip) { 1302 drm_printf(m, "*\n"); 1303 skip = true; 1304 } 1305 continue; 1306 } 1307 1308 WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos, 1309 rowsize, sizeof(u32), 1310 line, sizeof(line), 1311 false) >= sizeof(line)); 1312 drm_printf(m, "[%04zx] %s\n", pos, line); 1313 1314 prev = buf + pos; 1315 skip = false; 1316 } 1317 } 1318 1319 static void intel_engine_print_registers(struct intel_engine_cs *engine, 1320 struct drm_printer *m) 1321 { 1322 struct drm_i915_private *dev_priv = engine->i915; 1323 const struct intel_engine_execlists * const execlists = 1324 &engine->execlists; 1325 unsigned long flags; 1326 u64 addr; 1327 1328 if (engine->id == RCS0 && IS_GEN_RANGE(dev_priv, 4, 7)) 1329 drm_printf(m, "\tCCID: 0x%08x\n", ENGINE_READ(engine, CCID)); 1330 drm_printf(m, "\tRING_START: 0x%08x\n", 1331 ENGINE_READ(engine, RING_START)); 1332 drm_printf(m, "\tRING_HEAD: 0x%08x\n", 1333 ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR); 1334 drm_printf(m, "\tRING_TAIL: 0x%08x\n", 1335 ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR); 1336 drm_printf(m, "\tRING_CTL: 0x%08x%s\n", 1337 ENGINE_READ(engine, RING_CTL), 1338 ENGINE_READ(engine, RING_CTL) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? " [waiting]" : ""); 1339 if (INTEL_GEN(engine->i915) > 2) { 1340 drm_printf(m, "\tRING_MODE: 0x%08x%s\n", 1341 ENGINE_READ(engine, RING_MI_MODE), 1342 ENGINE_READ(engine, RING_MI_MODE) & (MODE_IDLE) ? " [idle]" : ""); 1343 } 1344 1345 if (INTEL_GEN(dev_priv) >= 6) { 1346 drm_printf(m, "\tRING_IMR: %08x\n", 1347 ENGINE_READ(engine, RING_IMR)); 1348 } 1349 1350 addr = intel_engine_get_active_head(engine); 1351 drm_printf(m, "\tACTHD: 0x%08x_%08x\n", 1352 upper_32_bits(addr), lower_32_bits(addr)); 1353 addr = intel_engine_get_last_batch_head(engine); 1354 drm_printf(m, "\tBBADDR: 0x%08x_%08x\n", 1355 upper_32_bits(addr), lower_32_bits(addr)); 1356 if (INTEL_GEN(dev_priv) >= 8) 1357 addr = ENGINE_READ64(engine, RING_DMA_FADD, RING_DMA_FADD_UDW); 1358 else if (INTEL_GEN(dev_priv) >= 4) 1359 addr = ENGINE_READ(engine, RING_DMA_FADD); 1360 else 1361 addr = ENGINE_READ(engine, DMA_FADD_I8XX); 1362 drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n", 1363 upper_32_bits(addr), lower_32_bits(addr)); 1364 if (INTEL_GEN(dev_priv) >= 4) { 1365 drm_printf(m, "\tIPEIR: 0x%08x\n", 1366 ENGINE_READ(engine, RING_IPEIR)); 1367 drm_printf(m, "\tIPEHR: 0x%08x\n", 1368 ENGINE_READ(engine, RING_IPEHR)); 1369 } else { 1370 drm_printf(m, "\tIPEIR: 0x%08x\n", ENGINE_READ(engine, IPEIR)); 1371 drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, IPEHR)); 1372 } 1373 1374 if (HAS_EXECLISTS(dev_priv)) { 1375 const u32 *hws = 1376 &engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX]; 1377 const u8 num_entries = execlists->csb_size; 1378 unsigned int idx; 1379 u8 read, write; 1380 1381 drm_printf(m, "\tExeclist status: 0x%08x %08x, entries %u\n", 1382 ENGINE_READ(engine, RING_EXECLIST_STATUS_LO), 1383 ENGINE_READ(engine, RING_EXECLIST_STATUS_HI), 1384 num_entries); 1385 1386 read = execlists->csb_head; 1387 write = READ_ONCE(*execlists->csb_write); 1388 1389 drm_printf(m, "\tExeclist CSB read %d, write %d, tasklet queued? %s (%s)\n", 1390 read, write, 1391 yesno(test_bit(TASKLET_STATE_SCHED, 1392 &engine->execlists.tasklet.state)), 1393 enableddisabled(!atomic_read(&engine->execlists.tasklet.count))); 1394 if (read >= num_entries) 1395 read = 0; 1396 if (write >= num_entries) 1397 write = 0; 1398 if (read > write) 1399 write += num_entries; 1400 while (read < write) { 1401 idx = ++read % num_entries; 1402 drm_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n", 1403 idx, hws[idx * 2], hws[idx * 2 + 1]); 1404 } 1405 1406 spin_lock_irqsave(&engine->active.lock, flags); 1407 for (idx = 0; idx < execlists_num_ports(execlists); idx++) { 1408 struct i915_request *rq; 1409 unsigned int count; 1410 char hdr[80]; 1411 1412 rq = port_unpack(&execlists->port[idx], &count); 1413 if (!rq) { 1414 drm_printf(m, "\t\tELSP[%d] idle\n", idx); 1415 } else if (!i915_request_signaled(rq)) { 1416 snprintf(hdr, sizeof(hdr), 1417 "\t\tELSP[%d] count=%d, ring:{start:%08x, hwsp:%08x, seqno:%08x}, rq: ", 1418 idx, count, 1419 i915_ggtt_offset(rq->ring->vma), 1420 rq->timeline->hwsp_offset, 1421 hwsp_seqno(rq)); 1422 print_request(m, rq, hdr); 1423 } else { 1424 print_request(m, rq, "\t\tELSP[%d] rq: "); 1425 } 1426 } 1427 drm_printf(m, "\t\tHW active? 0x%x\n", execlists->active); 1428 spin_unlock_irqrestore(&engine->active.lock, flags); 1429 } else if (INTEL_GEN(dev_priv) > 6) { 1430 drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n", 1431 ENGINE_READ(engine, RING_PP_DIR_BASE)); 1432 drm_printf(m, "\tPP_DIR_BASE_READ: 0x%08x\n", 1433 ENGINE_READ(engine, RING_PP_DIR_BASE_READ)); 1434 drm_printf(m, "\tPP_DIR_DCLV: 0x%08x\n", 1435 ENGINE_READ(engine, RING_PP_DIR_DCLV)); 1436 } 1437 } 1438 1439 static void print_request_ring(struct drm_printer *m, struct i915_request *rq) 1440 { 1441 void *ring; 1442 int size; 1443 1444 drm_printf(m, 1445 "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n", 1446 rq->head, rq->postfix, rq->tail, 1447 rq->batch ? upper_32_bits(rq->batch->node.start) : ~0u, 1448 rq->batch ? lower_32_bits(rq->batch->node.start) : ~0u); 1449 1450 size = rq->tail - rq->head; 1451 if (rq->tail < rq->head) 1452 size += rq->ring->size; 1453 1454 ring = kmalloc(size, GFP_ATOMIC); 1455 if (ring) { 1456 const void *vaddr = rq->ring->vaddr; 1457 unsigned int head = rq->head; 1458 unsigned int len = 0; 1459 1460 if (rq->tail < head) { 1461 len = rq->ring->size - head; 1462 memcpy(ring, vaddr + head, len); 1463 head = 0; 1464 } 1465 memcpy(ring + len, vaddr + head, size - len); 1466 1467 hexdump(m, ring, size); 1468 kfree(ring); 1469 } 1470 } 1471 1472 void intel_engine_dump(struct intel_engine_cs *engine, 1473 struct drm_printer *m, 1474 const char *header, ...) 1475 { 1476 struct i915_gpu_error * const error = &engine->i915->gpu_error; 1477 struct i915_request *rq; 1478 intel_wakeref_t wakeref; 1479 unsigned long flags; 1480 1481 if (header) { 1482 va_list ap; 1483 1484 va_start(ap, header); 1485 drm_vprintf(m, header, &ap); 1486 va_end(ap); 1487 } 1488 1489 if (i915_reset_failed(engine->i915)) 1490 drm_printf(m, "*** WEDGED ***\n"); 1491 1492 drm_printf(m, "\tAwake? %d\n", atomic_read(&engine->wakeref.count)); 1493 drm_printf(m, "\tHangcheck: %d ms ago\n", 1494 jiffies_to_msecs(jiffies - engine->hangcheck.action_timestamp)); 1495 drm_printf(m, "\tReset count: %d (global %d)\n", 1496 i915_reset_engine_count(error, engine), 1497 i915_reset_count(error)); 1498 1499 drm_printf(m, "\tRequests:\n"); 1500 1501 spin_lock_irqsave(&engine->active.lock, flags); 1502 rq = intel_engine_find_active_request(engine); 1503 if (rq) { 1504 print_request(m, rq, "\t\tactive "); 1505 1506 drm_printf(m, "\t\tring->start: 0x%08x\n", 1507 i915_ggtt_offset(rq->ring->vma)); 1508 drm_printf(m, "\t\tring->head: 0x%08x\n", 1509 rq->ring->head); 1510 drm_printf(m, "\t\tring->tail: 0x%08x\n", 1511 rq->ring->tail); 1512 drm_printf(m, "\t\tring->emit: 0x%08x\n", 1513 rq->ring->emit); 1514 drm_printf(m, "\t\tring->space: 0x%08x\n", 1515 rq->ring->space); 1516 drm_printf(m, "\t\tring->hwsp: 0x%08x\n", 1517 rq->timeline->hwsp_offset); 1518 1519 print_request_ring(m, rq); 1520 } 1521 spin_unlock_irqrestore(&engine->active.lock, flags); 1522 1523 wakeref = intel_runtime_pm_get_if_in_use(&engine->i915->runtime_pm); 1524 if (wakeref) { 1525 intel_engine_print_registers(engine, m); 1526 intel_runtime_pm_put(&engine->i915->runtime_pm, wakeref); 1527 } else { 1528 drm_printf(m, "\tDevice is asleep; skipping register dump\n"); 1529 } 1530 1531 intel_execlists_show_requests(engine, m, print_request, 8); 1532 1533 drm_printf(m, "HWSP:\n"); 1534 hexdump(m, engine->status_page.addr, PAGE_SIZE); 1535 1536 drm_printf(m, "Idle? %s\n", yesno(intel_engine_is_idle(engine))); 1537 1538 intel_engine_print_breadcrumbs(engine, m); 1539 } 1540 1541 static u8 user_class_map[] = { 1542 [I915_ENGINE_CLASS_RENDER] = RENDER_CLASS, 1543 [I915_ENGINE_CLASS_COPY] = COPY_ENGINE_CLASS, 1544 [I915_ENGINE_CLASS_VIDEO] = VIDEO_DECODE_CLASS, 1545 [I915_ENGINE_CLASS_VIDEO_ENHANCE] = VIDEO_ENHANCEMENT_CLASS, 1546 }; 1547 1548 struct intel_engine_cs * 1549 intel_engine_lookup_user(struct drm_i915_private *i915, u8 class, u8 instance) 1550 { 1551 if (class >= ARRAY_SIZE(user_class_map)) 1552 return NULL; 1553 1554 class = user_class_map[class]; 1555 1556 GEM_BUG_ON(class > MAX_ENGINE_CLASS); 1557 1558 if (instance > MAX_ENGINE_INSTANCE) 1559 return NULL; 1560 1561 return i915->engine_class[class][instance]; 1562 } 1563 1564 /** 1565 * intel_enable_engine_stats() - Enable engine busy tracking on engine 1566 * @engine: engine to enable stats collection 1567 * 1568 * Start collecting the engine busyness data for @engine. 1569 * 1570 * Returns 0 on success or a negative error code. 1571 */ 1572 int intel_enable_engine_stats(struct intel_engine_cs *engine) 1573 { 1574 struct intel_engine_execlists *execlists = &engine->execlists; 1575 unsigned long flags; 1576 int err = 0; 1577 1578 if (!intel_engine_supports_stats(engine)) 1579 return -ENODEV; 1580 1581 spin_lock_irqsave(&engine->active.lock, flags); 1582 write_seqlock(&engine->stats.lock); 1583 1584 if (unlikely(engine->stats.enabled == ~0)) { 1585 err = -EBUSY; 1586 goto unlock; 1587 } 1588 1589 if (engine->stats.enabled++ == 0) { 1590 const struct execlist_port *port = execlists->port; 1591 unsigned int num_ports = execlists_num_ports(execlists); 1592 1593 engine->stats.enabled_at = ktime_get(); 1594 1595 /* XXX submission method oblivious? */ 1596 while (num_ports-- && port_isset(port)) { 1597 engine->stats.active++; 1598 port++; 1599 } 1600 1601 if (engine->stats.active) 1602 engine->stats.start = engine->stats.enabled_at; 1603 } 1604 1605 unlock: 1606 write_sequnlock(&engine->stats.lock); 1607 spin_unlock_irqrestore(&engine->active.lock, flags); 1608 1609 return err; 1610 } 1611 1612 static ktime_t __intel_engine_get_busy_time(struct intel_engine_cs *engine) 1613 { 1614 ktime_t total = engine->stats.total; 1615 1616 /* 1617 * If the engine is executing something at the moment 1618 * add it to the total. 1619 */ 1620 if (engine->stats.active) 1621 total = ktime_add(total, 1622 ktime_sub(ktime_get(), engine->stats.start)); 1623 1624 return total; 1625 } 1626 1627 /** 1628 * intel_engine_get_busy_time() - Return current accumulated engine busyness 1629 * @engine: engine to report on 1630 * 1631 * Returns accumulated time @engine was busy since engine stats were enabled. 1632 */ 1633 ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine) 1634 { 1635 unsigned int seq; 1636 ktime_t total; 1637 1638 do { 1639 seq = read_seqbegin(&engine->stats.lock); 1640 total = __intel_engine_get_busy_time(engine); 1641 } while (read_seqretry(&engine->stats.lock, seq)); 1642 1643 return total; 1644 } 1645 1646 /** 1647 * intel_disable_engine_stats() - Disable engine busy tracking on engine 1648 * @engine: engine to disable stats collection 1649 * 1650 * Stops collecting the engine busyness data for @engine. 1651 */ 1652 void intel_disable_engine_stats(struct intel_engine_cs *engine) 1653 { 1654 unsigned long flags; 1655 1656 if (!intel_engine_supports_stats(engine)) 1657 return; 1658 1659 write_seqlock_irqsave(&engine->stats.lock, flags); 1660 WARN_ON_ONCE(engine->stats.enabled == 0); 1661 if (--engine->stats.enabled == 0) { 1662 engine->stats.total = __intel_engine_get_busy_time(engine); 1663 engine->stats.active = 0; 1664 } 1665 write_sequnlock_irqrestore(&engine->stats.lock, flags); 1666 } 1667 1668 static bool match_ring(struct i915_request *rq) 1669 { 1670 u32 ring = ENGINE_READ(rq->engine, RING_START); 1671 1672 return ring == i915_ggtt_offset(rq->ring->vma); 1673 } 1674 1675 struct i915_request * 1676 intel_engine_find_active_request(struct intel_engine_cs *engine) 1677 { 1678 struct i915_request *request, *active = NULL; 1679 1680 /* 1681 * We are called by the error capture, reset and to dump engine 1682 * state at random points in time. In particular, note that neither is 1683 * crucially ordered with an interrupt. After a hang, the GPU is dead 1684 * and we assume that no more writes can happen (we waited long enough 1685 * for all writes that were in transaction to be flushed) - adding an 1686 * extra delay for a recent interrupt is pointless. Hence, we do 1687 * not need an engine->irq_seqno_barrier() before the seqno reads. 1688 * At all other times, we must assume the GPU is still running, but 1689 * we only care about the snapshot of this moment. 1690 */ 1691 lockdep_assert_held(&engine->active.lock); 1692 list_for_each_entry(request, &engine->active.requests, sched.link) { 1693 if (i915_request_completed(request)) 1694 continue; 1695 1696 if (!i915_request_started(request)) 1697 continue; 1698 1699 /* More than one preemptible request may match! */ 1700 if (!match_ring(request)) 1701 continue; 1702 1703 active = request; 1704 break; 1705 } 1706 1707 return active; 1708 } 1709 1710 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1711 #include "selftest_engine_cs.c" 1712 #endif 1713