drivers/gpu/drm/i915/selftests/intel_lrc.c

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #include "../i915_selftest.h"
   8 #include "igt_flush_test.h"
   9
  10 #include "mock_context.h"
  11
  12 struct spinner {
  13         struct drm_i915_private *i915;
  14         struct drm_i915_gem_object *hws;
  15         struct drm_i915_gem_object *obj;
  16         u32 *batch;
  17         void *seqno;
  18 };
  19
  20 static int spinner_init(struct spinner *spin, struct drm_i915_private *i915)
  21 {
  22         unsigned int mode;
  23         void *vaddr;
  24         int err;
  25
  26         GEM_BUG_ON(INTEL_GEN(i915) < 8);
  27
  28         memset(spin, 0, sizeof(*spin));
  29         spin->i915 = i915;
  30
  31         spin->hws = i915_gem_object_create_internal(i915, PAGE_SIZE);
  32         if (IS_ERR(spin->hws)) {
  33                 err = PTR_ERR(spin->hws);
  34                 goto err;
  35         }
  36
  37         spin->obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
  38         if (IS_ERR(spin->obj)) {
  39                 err = PTR_ERR(spin->obj);
  40                 goto err_hws;
  41         }
  42
  43         i915_gem_object_set_cache_level(spin->hws, I915_CACHE_LLC);
  44         vaddr = i915_gem_object_pin_map(spin->hws, I915_MAP_WB);
  45         if (IS_ERR(vaddr)) {
  46                 err = PTR_ERR(vaddr);
  47                 goto err_obj;
  48         }
  49         spin->seqno = memset(vaddr, 0xff, PAGE_SIZE);
  50
  51         mode = HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
  52         vaddr = i915_gem_object_pin_map(spin->obj, mode);
  53         if (IS_ERR(vaddr)) {
  54                 err = PTR_ERR(vaddr);
  55                 goto err_unpin_hws;
  56         }
  57         spin->batch = vaddr;
  58
  59         return 0;
  60
  61 err_unpin_hws:
  62         i915_gem_object_unpin_map(spin->hws);
  63 err_obj:
  64         i915_gem_object_put(spin->obj);
  65 err_hws:
  66         i915_gem_object_put(spin->hws);
  67 err:
  68         return err;
  69 }
  70
  71 static unsigned int seqno_offset(u64 fence)
  72 {
  73         return offset_in_page(sizeof(u32) * fence);
  74 }
  75
  76 static u64 hws_address(const struct i915_vma *hws,
  77                        const struct i915_request *rq)
  78 {
  79         return hws->node.start + seqno_offset(rq->fence.context);
  80 }
  81
  82 static int emit_recurse_batch(struct spinner *spin,
  83                               struct i915_request *rq,
  84                               u32 arbitration_command)
  85 {
  86         struct i915_address_space *vm = &rq->gem_context->ppgtt->vm;
  87         struct i915_vma *hws, *vma;
  88         u32 *batch;
  89         int err;
  90
  91         vma = i915_vma_instance(spin->obj, vm, NULL);
  92         if (IS_ERR(vma))
  93                 return PTR_ERR(vma);
  94
  95         hws = i915_vma_instance(spin->hws, vm, NULL);
  96         if (IS_ERR(hws))
  97                 return PTR_ERR(hws);
  98
  99         err = i915_vma_pin(vma, 0, 0, PIN_USER);
 100         if (err)
 101                 return err;
 102
 103         err = i915_vma_pin(hws, 0, 0, PIN_USER);
 104         if (err)
 105                 goto unpin_vma;
 106
 107         err = i915_vma_move_to_active(vma, rq, 0);
 108         if (err)
 109                 goto unpin_hws;
 110
 111         if (!i915_gem_object_has_active_reference(vma->obj)) {
 112                 i915_gem_object_get(vma->obj);
 113                 i915_gem_object_set_active_reference(vma->obj);
 114         }
 115
 116         err = i915_vma_move_to_active(hws, rq, 0);
 117         if (err)
 118                 goto unpin_hws;
 119
 120         if (!i915_gem_object_has_active_reference(hws->obj)) {
 121                 i915_gem_object_get(hws->obj);
 122                 i915_gem_object_set_active_reference(hws->obj);
 123         }
 124
 125         batch = spin->batch;
 126
 127         *batch++ = MI_STORE_DWORD_IMM_GEN4;
 128         *batch++ = lower_32_bits(hws_address(hws, rq));
 129         *batch++ = upper_32_bits(hws_address(hws, rq));
 130         *batch++ = rq->fence.seqno;
 131
 132         *batch++ = arbitration_command;
 133
 134         *batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
 135         *batch++ = lower_32_bits(vma->node.start);
 136         *batch++ = upper_32_bits(vma->node.start);
 137         *batch++ = MI_BATCH_BUFFER_END; /* not reached */
 138
 139         i915_gem_chipset_flush(spin->i915);
 140
 141         err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, 0);
 142
 143 unpin_hws:
 144         i915_vma_unpin(hws);
 145 unpin_vma:
 146         i915_vma_unpin(vma);
 147         return err;
 148 }
 149
 150 static struct i915_request *
 151 spinner_create_request(struct spinner *spin,
 152                        struct i915_gem_context *ctx,
 153                        struct intel_engine_cs *engine,
 154                        u32 arbitration_command)
 155 {
 156         struct i915_request *rq;
 157         int err;
 158
 159         rq = i915_request_alloc(engine, ctx);
 160         if (IS_ERR(rq))
 161                 return rq;
 162
 163         err = emit_recurse_batch(spin, rq, arbitration_command);
 164         if (err) {
 165                 i915_request_add(rq);
 166                 return ERR_PTR(err);
 167         }
 168
 169         return rq;
 170 }
 171
 172 static u32 hws_seqno(const struct spinner *spin, const struct i915_request *rq)
 173 {
 174         u32 *seqno = spin->seqno + seqno_offset(rq->fence.context);
 175
 176         return READ_ONCE(*seqno);
 177 }
 178
 179 static void spinner_end(struct spinner *spin)
 180 {
 181         *spin->batch = MI_BATCH_BUFFER_END;
 182         i915_gem_chipset_flush(spin->i915);
 183 }
 184
 185 static void spinner_fini(struct spinner *spin)
 186 {
 187         spinner_end(spin);
 188
 189         i915_gem_object_unpin_map(spin->obj);
 190         i915_gem_object_put(spin->obj);
 191
 192         i915_gem_object_unpin_map(spin->hws);
 193         i915_gem_object_put(spin->hws);
 194 }
 195
 196 static bool wait_for_spinner(struct spinner *spin, struct i915_request *rq)
 197 {
 198         if (!wait_event_timeout(rq->execute,
 199                                 READ_ONCE(rq->global_seqno),
 200                                 msecs_to_jiffies(10)))
 201                 return false;
 202
 203         return !(wait_for_us(i915_seqno_passed(hws_seqno(spin, rq),
 204                                                rq->fence.seqno),
 205                              10) &&
 206                  wait_for(i915_seqno_passed(hws_seqno(spin, rq),
 207                                             rq->fence.seqno),
 208                           1000));
 209 }
 210
 211 static int live_sanitycheck(void *arg)
 212 {
 213         struct drm_i915_private *i915 = arg;
 214         struct intel_engine_cs *engine;
 215         struct i915_gem_context *ctx;
 216         enum intel_engine_id id;
 217         struct spinner spin;
 218         int err = -ENOMEM;
 219
 220         if (!HAS_LOGICAL_RING_CONTEXTS(i915))
 221                 return 0;
 222
 223         mutex_lock(&i915->drm.struct_mutex);
 224
 225         if (spinner_init(&spin, i915))
 226                 goto err_unlock;
 227
 228         ctx = kernel_context(i915);
 229         if (!ctx)
 230                 goto err_spin;
 231
 232         for_each_engine(engine, i915, id) {
 233                 struct i915_request *rq;
 234
 235                 rq = spinner_create_request(&spin, ctx, engine, MI_NOOP);
 236                 if (IS_ERR(rq)) {
 237                         err = PTR_ERR(rq);
 238                         goto err_ctx;
 239                 }
 240
 241                 i915_request_add(rq);
 242                 if (!wait_for_spinner(&spin, rq)) {
 243                         GEM_TRACE("spinner failed to start\n");
 244                         GEM_TRACE_DUMP();
 245                         i915_gem_set_wedged(i915);
 246                         err = -EIO;
 247                         goto err_ctx;
 248                 }
 249
 250                 spinner_end(&spin);
 251                 if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
 252                         err = -EIO;
 253                         goto err_ctx;
 254                 }
 255         }
 256
 257         err = 0;
 258 err_ctx:
 259         kernel_context_close(ctx);
 260 err_spin:
 261         spinner_fini(&spin);
 262 err_unlock:
 263         igt_flush_test(i915, I915_WAIT_LOCKED);
 264         mutex_unlock(&i915->drm.struct_mutex);
 265         return err;
 266 }
 267
 268 static int live_preempt(void *arg)
 269 {
 270         struct drm_i915_private *i915 = arg;
 271         struct i915_gem_context *ctx_hi, *ctx_lo;
 272         struct spinner spin_hi, spin_lo;
 273         struct intel_engine_cs *engine;
 274         enum intel_engine_id id;
 275         int err = -ENOMEM;
 276
 277         if (!HAS_LOGICAL_RING_PREEMPTION(i915))
 278                 return 0;
 279
 280         mutex_lock(&i915->drm.struct_mutex);
 281
 282         if (spinner_init(&spin_hi, i915))
 283                 goto err_unlock;
 284
 285         if (spinner_init(&spin_lo, i915))
 286                 goto err_spin_hi;
 287
 288         ctx_hi = kernel_context(i915);
 289         if (!ctx_hi)
 290                 goto err_spin_lo;
 291         ctx_hi->sched.priority = I915_CONTEXT_MAX_USER_PRIORITY;
 292
 293         ctx_lo = kernel_context(i915);
 294         if (!ctx_lo)
 295                 goto err_ctx_hi;
 296         ctx_lo->sched.priority = I915_CONTEXT_MIN_USER_PRIORITY;
 297
 298         for_each_engine(engine, i915, id) {
 299                 struct i915_request *rq;
 300
 301                 rq = spinner_create_request(&spin_lo, ctx_lo, engine,
 302                                             MI_ARB_CHECK);
 303                 if (IS_ERR(rq)) {
 304                         err = PTR_ERR(rq);
 305                         goto err_ctx_lo;
 306                 }
 307
 308                 i915_request_add(rq);
 309                 if (!wait_for_spinner(&spin_lo, rq)) {
 310                         GEM_TRACE("lo spinner failed to start\n");
 311                         GEM_TRACE_DUMP();
 312                         i915_gem_set_wedged(i915);
 313                         err = -EIO;
 314                         goto err_ctx_lo;
 315                 }
 316
 317                 rq = spinner_create_request(&spin_hi, ctx_hi, engine,
 318                                             MI_ARB_CHECK);
 319                 if (IS_ERR(rq)) {
 320                         spinner_end(&spin_lo);
 321                         err = PTR_ERR(rq);
 322                         goto err_ctx_lo;
 323                 }
 324
 325                 i915_request_add(rq);
 326                 if (!wait_for_spinner(&spin_hi, rq)) {
 327                         GEM_TRACE("hi spinner failed to start\n");
 328                         GEM_TRACE_DUMP();
 329                         i915_gem_set_wedged(i915);
 330                         err = -EIO;
 331                         goto err_ctx_lo;
 332                 }
 333
 334                 spinner_end(&spin_hi);
 335                 spinner_end(&spin_lo);
 336                 if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
 337                         err = -EIO;
 338                         goto err_ctx_lo;
 339                 }
 340         }
 341
 342         err = 0;
 343 err_ctx_lo:
 344         kernel_context_close(ctx_lo);
 345 err_ctx_hi:
 346         kernel_context_close(ctx_hi);
 347 err_spin_lo:
 348         spinner_fini(&spin_lo);
 349 err_spin_hi:
 350         spinner_fini(&spin_hi);
 351 err_unlock:
 352         igt_flush_test(i915, I915_WAIT_LOCKED);
 353         mutex_unlock(&i915->drm.struct_mutex);
 354         return err;
 355 }
 356
 357 static int live_late_preempt(void *arg)
 358 {
 359         struct drm_i915_private *i915 = arg;
 360         struct i915_gem_context *ctx_hi, *ctx_lo;
 361         struct spinner spin_hi, spin_lo;
 362         struct intel_engine_cs *engine;
 363         struct i915_sched_attr attr = {};
 364         enum intel_engine_id id;
 365         int err = -ENOMEM;
 366
 367         if (!HAS_LOGICAL_RING_PREEMPTION(i915))
 368                 return 0;
 369
 370         mutex_lock(&i915->drm.struct_mutex);
 371
 372         if (spinner_init(&spin_hi, i915))
 373                 goto err_unlock;
 374
 375         if (spinner_init(&spin_lo, i915))
 376                 goto err_spin_hi;
 377
 378         ctx_hi = kernel_context(i915);
 379         if (!ctx_hi)
 380                 goto err_spin_lo;
 381
 382         ctx_lo = kernel_context(i915);
 383         if (!ctx_lo)
 384                 goto err_ctx_hi;
 385
 386         for_each_engine(engine, i915, id) {
 387                 struct i915_request *rq;
 388
 389                 rq = spinner_create_request(&spin_lo, ctx_lo, engine,
 390                                             MI_ARB_CHECK);
 391                 if (IS_ERR(rq)) {
 392                         err = PTR_ERR(rq);
 393                         goto err_ctx_lo;
 394                 }
 395
 396                 i915_request_add(rq);
 397                 if (!wait_for_spinner(&spin_lo, rq)) {
 398                         pr_err("First context failed to start\n");
 399                         goto err_wedged;
 400                 }
 401
 402                 rq = spinner_create_request(&spin_hi, ctx_hi, engine, MI_NOOP);
 403                 if (IS_ERR(rq)) {
 404                         spinner_end(&spin_lo);
 405                         err = PTR_ERR(rq);
 406                         goto err_ctx_lo;
 407                 }
 408
 409                 i915_request_add(rq);
 410                 if (wait_for_spinner(&spin_hi, rq)) {
 411                         pr_err("Second context overtook first?\n");
 412                         goto err_wedged;
 413                 }
 414
 415                 attr.priority = I915_PRIORITY_MAX;
 416                 engine->schedule(rq, &attr);
 417
 418                 if (!wait_for_spinner(&spin_hi, rq)) {
 419                         pr_err("High priority context failed to preempt the low priority context\n");
 420                         GEM_TRACE_DUMP();
 421                         goto err_wedged;
 422                 }
 423
 424                 spinner_end(&spin_hi);
 425                 spinner_end(&spin_lo);
 426                 if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
 427                         err = -EIO;
 428                         goto err_ctx_lo;
 429                 }
 430         }
 431
 432         err = 0;
 433 err_ctx_lo:
 434         kernel_context_close(ctx_lo);
 435 err_ctx_hi:
 436         kernel_context_close(ctx_hi);
 437 err_spin_lo:
 438         spinner_fini(&spin_lo);
 439 err_spin_hi:
 440         spinner_fini(&spin_hi);
 441 err_unlock:
 442         igt_flush_test(i915, I915_WAIT_LOCKED);
 443         mutex_unlock(&i915->drm.struct_mutex);
 444         return err;
 445
 446 err_wedged:
 447         spinner_end(&spin_hi);
 448         spinner_end(&spin_lo);
 449         i915_gem_set_wedged(i915);
 450         err = -EIO;
 451         goto err_ctx_lo;
 452 }
 453
 454 static int live_preempt_hang(void *arg)
 455 {
 456         struct drm_i915_private *i915 = arg;
 457         struct i915_gem_context *ctx_hi, *ctx_lo;
 458         struct spinner spin_hi, spin_lo;
 459         struct intel_engine_cs *engine;
 460         enum intel_engine_id id;
 461         int err = -ENOMEM;
 462
 463         if (!HAS_LOGICAL_RING_PREEMPTION(i915))
 464                 return 0;
 465
 466         if (!intel_has_reset_engine(i915))
 467                 return 0;
 468
 469         mutex_lock(&i915->drm.struct_mutex);
 470
 471         if (spinner_init(&spin_hi, i915))
 472                 goto err_unlock;
 473
 474         if (spinner_init(&spin_lo, i915))
 475                 goto err_spin_hi;
 476
 477         ctx_hi = kernel_context(i915);
 478         if (!ctx_hi)
 479                 goto err_spin_lo;
 480         ctx_hi->sched.priority = I915_CONTEXT_MAX_USER_PRIORITY;
 481
 482         ctx_lo = kernel_context(i915);
 483         if (!ctx_lo)
 484                 goto err_ctx_hi;
 485         ctx_lo->sched.priority = I915_CONTEXT_MIN_USER_PRIORITY;
 486
 487         for_each_engine(engine, i915, id) {
 488                 struct i915_request *rq;
 489
 490                 if (!intel_engine_has_preemption(engine))
 491                         continue;
 492
 493                 rq = spinner_create_request(&spin_lo, ctx_lo, engine,
 494                                             MI_ARB_CHECK);
 495                 if (IS_ERR(rq)) {
 496                         err = PTR_ERR(rq);
 497                         goto err_ctx_lo;
 498                 }
 499
 500                 i915_request_add(rq);
 501                 if (!wait_for_spinner(&spin_lo, rq)) {
 502                         GEM_TRACE("lo spinner failed to start\n");
 503                         GEM_TRACE_DUMP();
 504                         i915_gem_set_wedged(i915);
 505                         err = -EIO;
 506                         goto err_ctx_lo;
 507                 }
 508
 509                 rq = spinner_create_request(&spin_hi, ctx_hi, engine,
 510                                             MI_ARB_CHECK);
 511                 if (IS_ERR(rq)) {
 512                         spinner_end(&spin_lo);
 513                         err = PTR_ERR(rq);
 514                         goto err_ctx_lo;
 515                 }
 516
 517                 init_completion(&engine->execlists.preempt_hang.completion);
 518                 engine->execlists.preempt_hang.inject_hang = true;
 519
 520                 i915_request_add(rq);
 521
 522                 if (!wait_for_completion_timeout(&engine->execlists.preempt_hang.completion,
 523                                                  HZ / 10)) {
 524                         pr_err("Preemption did not occur within timeout!");
 525                         GEM_TRACE_DUMP();
 526                         i915_gem_set_wedged(i915);
 527                         err = -EIO;
 528                         goto err_ctx_lo;
 529                 }
 530
 531                 set_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
 532                 i915_reset_engine(engine, NULL);
 533                 clear_bit(I915_RESET_ENGINE + id, &i915->gpu_error.flags);
 534
 535                 engine->execlists.preempt_hang.inject_hang = false;
 536
 537                 if (!wait_for_spinner(&spin_hi, rq)) {
 538                         GEM_TRACE("hi spinner failed to start\n");
 539                         GEM_TRACE_DUMP();
 540                         i915_gem_set_wedged(i915);
 541                         err = -EIO;
 542                         goto err_ctx_lo;
 543                 }
 544
 545                 spinner_end(&spin_hi);
 546                 spinner_end(&spin_lo);
 547                 if (igt_flush_test(i915, I915_WAIT_LOCKED)) {
 548                         err = -EIO;
 549                         goto err_ctx_lo;
 550                 }
 551         }
 552
 553         err = 0;
 554 err_ctx_lo:
 555         kernel_context_close(ctx_lo);
 556 err_ctx_hi:
 557         kernel_context_close(ctx_hi);
 558 err_spin_lo:
 559         spinner_fini(&spin_lo);
 560 err_spin_hi:
 561         spinner_fini(&spin_hi);
 562 err_unlock:
 563         igt_flush_test(i915, I915_WAIT_LOCKED);
 564         mutex_unlock(&i915->drm.struct_mutex);
 565         return err;
 566 }
 567
 568 int intel_execlists_live_selftests(struct drm_i915_private *i915)
 569 {
 570         static const struct i915_subtest tests[] = {
 571                 SUBTEST(live_sanitycheck),
 572                 SUBTEST(live_preempt),
 573                 SUBTEST(live_late_preempt),
 574                 SUBTEST(live_preempt_hang),
 575         };
 576
 577         if (!HAS_EXECLISTS(i915))
 578                 return 0;
 579
 580         if (i915_terminally_wedged(&i915->gpu_error))
 581                 return 0;
 582
 583         return i915_subtests(tests, i915);
 584 }