drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c

   1 /*
   2  * Copyright 2015 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  * Authors: monk liu <[email protected]>
  23  */
  24
  25 #include <drm/drm_auth.h>
  26 #include <drm/drm_drv.h>
  27 #include "amdgpu.h"
  28 #include "amdgpu_sched.h"
  29 #include "amdgpu_ras.h"
  30 #include <linux/nospec.h>
  31
  32 #define to_amdgpu_ctx_entity(e) \
  33         container_of((e), struct amdgpu_ctx_entity, entity)
  34
  35 const unsigned int amdgpu_ctx_num_entities[AMDGPU_HW_IP_NUM] = {
  36         [AMDGPU_HW_IP_GFX]      =       1,
  37         [AMDGPU_HW_IP_COMPUTE]  =       4,
  38         [AMDGPU_HW_IP_DMA]      =       2,
  39         [AMDGPU_HW_IP_UVD]      =       1,
  40         [AMDGPU_HW_IP_VCE]      =       1,
  41         [AMDGPU_HW_IP_UVD_ENC]  =       1,
  42         [AMDGPU_HW_IP_VCN_DEC]  =       1,
  43         [AMDGPU_HW_IP_VCN_ENC]  =       1,
  44         [AMDGPU_HW_IP_VCN_JPEG] =       1,
  45 };
  46
  47 bool amdgpu_ctx_priority_is_valid(int32_t ctx_prio)
  48 {
  49         switch (ctx_prio) {
  50         case AMDGPU_CTX_PRIORITY_UNSET:
  51         case AMDGPU_CTX_PRIORITY_VERY_LOW:
  52         case AMDGPU_CTX_PRIORITY_LOW:
  53         case AMDGPU_CTX_PRIORITY_NORMAL:
  54         case AMDGPU_CTX_PRIORITY_HIGH:
  55         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
  56                 return true;
  57         default:
  58                 return false;
  59         }
  60 }
  61
  62 static enum drm_sched_priority
  63 amdgpu_ctx_to_drm_sched_prio(int32_t ctx_prio)
  64 {
  65         switch (ctx_prio) {
  66         case AMDGPU_CTX_PRIORITY_UNSET:
  67                 return DRM_SCHED_PRIORITY_UNSET;
  68
  69         case AMDGPU_CTX_PRIORITY_VERY_LOW:
  70                 return DRM_SCHED_PRIORITY_MIN;
  71
  72         case AMDGPU_CTX_PRIORITY_LOW:
  73                 return DRM_SCHED_PRIORITY_MIN;
  74
  75         case AMDGPU_CTX_PRIORITY_NORMAL:
  76                 return DRM_SCHED_PRIORITY_NORMAL;
  77
  78         case AMDGPU_CTX_PRIORITY_HIGH:
  79                 return DRM_SCHED_PRIORITY_HIGH;
  80
  81         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
  82                 return DRM_SCHED_PRIORITY_HIGH;
  83
  84         /* This should not happen as we sanitized userspace provided priority
  85          * already, WARN if this happens.
  86          */
  87         default:
  88                 WARN(1, "Invalid context priority %d\n", ctx_prio);
  89                 return DRM_SCHED_PRIORITY_NORMAL;
  90         }
  91
  92 }
  93
  94 static int amdgpu_ctx_priority_permit(struct drm_file *filp,
  95                                       int32_t priority)
  96 {
  97         if (!amdgpu_ctx_priority_is_valid(priority))
  98                 return -EINVAL;
  99
 100         /* NORMAL and below are accessible by everyone */
 101         if (priority <= AMDGPU_CTX_PRIORITY_NORMAL)
 102                 return 0;
 103
 104         if (capable(CAP_SYS_NICE))
 105                 return 0;
 106
 107         if (drm_is_current_master(filp))
 108                 return 0;
 109
 110         return -EACCES;
 111 }
 112
 113 static enum amdgpu_gfx_pipe_priority amdgpu_ctx_prio_to_gfx_pipe_prio(int32_t prio)
 114 {
 115         switch (prio) {
 116         case AMDGPU_CTX_PRIORITY_HIGH:
 117         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
 118                 return AMDGPU_GFX_PIPE_PRIO_HIGH;
 119         default:
 120                 return AMDGPU_GFX_PIPE_PRIO_NORMAL;
 121         }
 122 }
 123
 124 static enum amdgpu_ring_priority_level amdgpu_ctx_sched_prio_to_ring_prio(int32_t prio)
 125 {
 126         switch (prio) {
 127         case AMDGPU_CTX_PRIORITY_HIGH:
 128                 return AMDGPU_RING_PRIO_1;
 129         case AMDGPU_CTX_PRIORITY_VERY_HIGH:
 130                 return AMDGPU_RING_PRIO_2;
 131         default:
 132                 return AMDGPU_RING_PRIO_0;
 133         }
 134 }
 135
 136 static unsigned int amdgpu_ctx_get_hw_prio(struct amdgpu_ctx *ctx, u32 hw_ip)
 137 {
 138         struct amdgpu_device *adev = ctx->mgr->adev;
 139         unsigned int hw_prio;
 140         int32_t ctx_prio;
 141
 142         ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
 143                         ctx->init_priority : ctx->override_priority;
 144
 145         switch (hw_ip) {
 146         case AMDGPU_HW_IP_GFX:
 147         case AMDGPU_HW_IP_COMPUTE:
 148                 hw_prio = amdgpu_ctx_prio_to_gfx_pipe_prio(ctx_prio);
 149                 break;
 150         case AMDGPU_HW_IP_VCE:
 151         case AMDGPU_HW_IP_VCN_ENC:
 152                 hw_prio = amdgpu_ctx_sched_prio_to_ring_prio(ctx_prio);
 153                 break;
 154         default:
 155                 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
 156                 break;
 157         }
 158
 159         hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
 160         if (adev->gpu_sched[hw_ip][hw_prio].num_scheds == 0)
 161                 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
 162
 163         return hw_prio;
 164 }
 165
 166 /* Calculate the time spend on the hw */
 167 static ktime_t amdgpu_ctx_fence_time(struct dma_fence *fence)
 168 {
 169         struct drm_sched_fence *s_fence;
 170
 171         if (!fence)
 172                 return ns_to_ktime(0);
 173
 174         /* When the fence is not even scheduled it can't have spend time */
 175         s_fence = to_drm_sched_fence(fence);
 176         if (!test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &s_fence->scheduled.flags))
 177                 return ns_to_ktime(0);
 178
 179         /* When it is still running account how much already spend */
 180         if (!test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &s_fence->finished.flags))
 181                 return ktime_sub(ktime_get(), s_fence->scheduled.timestamp);
 182
 183         return ktime_sub(s_fence->finished.timestamp,
 184                          s_fence->scheduled.timestamp);
 185 }
 186
 187 static ktime_t amdgpu_ctx_entity_time(struct amdgpu_ctx *ctx,
 188                                       struct amdgpu_ctx_entity *centity)
 189 {
 190         ktime_t res = ns_to_ktime(0);
 191         uint32_t i;
 192
 193         spin_lock(&ctx->ring_lock);
 194         for (i = 0; i < amdgpu_sched_jobs; i++) {
 195                 res = ktime_add(res, amdgpu_ctx_fence_time(centity->fences[i]));
 196         }
 197         spin_unlock(&ctx->ring_lock);
 198         return res;
 199 }
 200
 201 static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
 202                                   const u32 ring)
 203 {
 204         struct drm_gpu_scheduler **scheds = NULL, *sched = NULL;
 205         struct amdgpu_device *adev = ctx->mgr->adev;
 206         struct amdgpu_ctx_entity *entity;
 207         enum drm_sched_priority drm_prio;
 208         unsigned int hw_prio, num_scheds;
 209         int32_t ctx_prio;
 210         int r;
 211
 212         entity = kzalloc(struct_size(entity, fences, amdgpu_sched_jobs),
 213                          GFP_KERNEL);
 214         if (!entity)
 215                 return  -ENOMEM;
 216
 217         ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
 218                         ctx->init_priority : ctx->override_priority;
 219         entity->hw_ip = hw_ip;
 220         entity->sequence = 1;
 221         hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
 222         drm_prio = amdgpu_ctx_to_drm_sched_prio(ctx_prio);
 223
 224         hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
 225         scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
 226         num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 227
 228         /* disable load balance if the hw engine retains context among dependent jobs */
 229         if (hw_ip == AMDGPU_HW_IP_VCN_ENC ||
 230             hw_ip == AMDGPU_HW_IP_VCN_DEC ||
 231             hw_ip == AMDGPU_HW_IP_UVD_ENC ||
 232             hw_ip == AMDGPU_HW_IP_UVD) {
 233                 sched = drm_sched_pick_best(scheds, num_scheds);
 234                 scheds = &sched;
 235                 num_scheds = 1;
 236         }
 237
 238         r = drm_sched_entity_init(&entity->entity, drm_prio, scheds, num_scheds,
 239                                   &ctx->guilty);
 240         if (r)
 241                 goto error_free_entity;
 242
 243         /* It's not an error if we fail to install the new entity */
 244         if (cmpxchg(&ctx->entities[hw_ip][ring], NULL, entity))
 245                 goto cleanup_entity;
 246
 247         return 0;
 248
 249 cleanup_entity:
 250         drm_sched_entity_fini(&entity->entity);
 251
 252 error_free_entity:
 253         kfree(entity);
 254
 255         return r;
 256 }
 257
 258 static ktime_t amdgpu_ctx_fini_entity(struct amdgpu_ctx_entity *entity)
 259 {
 260         ktime_t res = ns_to_ktime(0);
 261         int i;
 262
 263         if (!entity)
 264                 return res;
 265
 266         for (i = 0; i < amdgpu_sched_jobs; ++i) {
 267                 res = ktime_add(res, amdgpu_ctx_fence_time(entity->fences[i]));
 268                 dma_fence_put(entity->fences[i]);
 269         }
 270
 271         kfree(entity);
 272         return res;
 273 }
 274
 275 static int amdgpu_ctx_get_stable_pstate(struct amdgpu_ctx *ctx,
 276                                         u32 *stable_pstate)
 277 {
 278         struct amdgpu_device *adev = ctx->mgr->adev;
 279         enum amd_dpm_forced_level current_level;
 280
 281         current_level = amdgpu_dpm_get_performance_level(adev);
 282
 283         switch (current_level) {
 284         case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
 285                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_STANDARD;
 286                 break;
 287         case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK:
 288                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK;
 289                 break;
 290         case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK:
 291                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK;
 292                 break;
 293         case AMD_DPM_FORCED_LEVEL_PROFILE_PEAK:
 294                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_PEAK;
 295                 break;
 296         default:
 297                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_NONE;
 298                 break;
 299         }
 300         return 0;
 301 }
 302
 303 static int amdgpu_ctx_init(struct amdgpu_ctx_mgr *mgr, int32_t priority,
 304                            struct drm_file *filp, struct amdgpu_ctx *ctx)
 305 {
 306         u32 current_stable_pstate;
 307         int r;
 308
 309         r = amdgpu_ctx_priority_permit(filp, priority);
 310         if (r)
 311                 return r;
 312
 313         memset(ctx, 0, sizeof(*ctx));
 314
 315         kref_init(&ctx->refcount);
 316         ctx->mgr = mgr;
 317         spin_lock_init(&ctx->ring_lock);
 318         mutex_init(&ctx->lock);
 319
 320         ctx->reset_counter = atomic_read(&mgr->adev->gpu_reset_counter);
 321         ctx->reset_counter_query = ctx->reset_counter;
 322         ctx->vram_lost_counter = atomic_read(&mgr->adev->vram_lost_counter);
 323         ctx->init_priority = priority;
 324         ctx->override_priority = AMDGPU_CTX_PRIORITY_UNSET;
 325
 326         r = amdgpu_ctx_get_stable_pstate(ctx, &current_stable_pstate);
 327         if (r)
 328                 return r;
 329
 330         ctx->stable_pstate = current_stable_pstate;
 331
 332         return 0;
 333 }
 334
 335 static int amdgpu_ctx_set_stable_pstate(struct amdgpu_ctx *ctx,
 336                                         u32 stable_pstate)
 337 {
 338         struct amdgpu_device *adev = ctx->mgr->adev;
 339         enum amd_dpm_forced_level level;
 340         u32 current_stable_pstate;
 341         int r;
 342
 343         mutex_lock(&adev->pm.stable_pstate_ctx_lock);
 344         if (adev->pm.stable_pstate_ctx && adev->pm.stable_pstate_ctx != ctx) {
 345                 r = -EBUSY;
 346                 goto done;
 347         }
 348
 349         r = amdgpu_ctx_get_stable_pstate(ctx, &current_stable_pstate);
 350         if (r || (stable_pstate == current_stable_pstate))
 351                 goto done;
 352
 353         switch (stable_pstate) {
 354         case AMDGPU_CTX_STABLE_PSTATE_NONE:
 355                 level = AMD_DPM_FORCED_LEVEL_AUTO;
 356                 break;
 357         case AMDGPU_CTX_STABLE_PSTATE_STANDARD:
 358                 level = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD;
 359                 break;
 360         case AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK:
 361                 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK;
 362                 break;
 363         case AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK:
 364                 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
 365                 break;
 366         case AMDGPU_CTX_STABLE_PSTATE_PEAK:
 367                 level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
 368                 break;
 369         default:
 370                 r = -EINVAL;
 371                 goto done;
 372         }
 373
 374         r = amdgpu_dpm_force_performance_level(adev, level);
 375
 376         if (level == AMD_DPM_FORCED_LEVEL_AUTO)
 377                 adev->pm.stable_pstate_ctx = NULL;
 378         else
 379                 adev->pm.stable_pstate_ctx = ctx;
 380 done:
 381         mutex_unlock(&adev->pm.stable_pstate_ctx_lock);
 382
 383         return r;
 384 }
 385
 386 static void amdgpu_ctx_fini(struct kref *ref)
 387 {
 388         struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
 389         struct amdgpu_ctx_mgr *mgr = ctx->mgr;
 390         struct amdgpu_device *adev = mgr->adev;
 391         unsigned i, j, idx;
 392
 393         if (!adev)
 394                 return;
 395
 396         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 397                 for (j = 0; j < AMDGPU_MAX_ENTITY_NUM; ++j) {
 398                         ktime_t spend;
 399
 400                         spend = amdgpu_ctx_fini_entity(ctx->entities[i][j]);
 401                         atomic64_add(ktime_to_ns(spend), &mgr->time_spend[i]);
 402                 }
 403         }
 404
 405         if (drm_dev_enter(&adev->ddev, &idx)) {
 406                 amdgpu_ctx_set_stable_pstate(ctx, ctx->stable_pstate);
 407                 drm_dev_exit(idx);
 408         }
 409
 410         mutex_destroy(&ctx->lock);
 411         kfree(ctx);
 412 }
 413
 414 int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
 415                           u32 ring, struct drm_sched_entity **entity)
 416 {
 417         int r;
 418
 419         if (hw_ip >= AMDGPU_HW_IP_NUM) {
 420                 DRM_ERROR("unknown HW IP type: %d\n", hw_ip);
 421                 return -EINVAL;
 422         }
 423
 424         /* Right now all IPs have only one instance - multiple rings. */
 425         if (instance != 0) {
 426                 DRM_DEBUG("invalid ip instance: %d\n", instance);
 427                 return -EINVAL;
 428         }
 429
 430         if (ring >= amdgpu_ctx_num_entities[hw_ip]) {
 431                 DRM_DEBUG("invalid ring: %d %d\n", hw_ip, ring);
 432                 return -EINVAL;
 433         }
 434
 435         if (ctx->entities[hw_ip][ring] == NULL) {
 436                 r = amdgpu_ctx_init_entity(ctx, hw_ip, ring);
 437                 if (r)
 438                         return r;
 439         }
 440
 441         *entity = &ctx->entities[hw_ip][ring]->entity;
 442         return 0;
 443 }
 444
 445 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
 446                             struct amdgpu_fpriv *fpriv,
 447                             struct drm_file *filp,
 448                             int32_t priority,
 449                             uint32_t *id)
 450 {
 451         struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
 452         struct amdgpu_ctx *ctx;
 453         int r;
 454
 455         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 456         if (!ctx)
 457                 return -ENOMEM;
 458
 459         mutex_lock(&mgr->lock);
 460         r = idr_alloc(&mgr->ctx_handles, ctx, 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);
 461         if (r < 0) {
 462                 mutex_unlock(&mgr->lock);
 463                 kfree(ctx);
 464                 return r;
 465         }
 466
 467         *id = (uint32_t)r;
 468         r = amdgpu_ctx_init(mgr, priority, filp, ctx);
 469         if (r) {
 470                 idr_remove(&mgr->ctx_handles, *id);
 471                 *id = 0;
 472                 kfree(ctx);
 473         }
 474         mutex_unlock(&mgr->lock);
 475         return r;
 476 }
 477
 478 static void amdgpu_ctx_do_release(struct kref *ref)
 479 {
 480         struct amdgpu_ctx *ctx;
 481         u32 i, j;
 482
 483         ctx = container_of(ref, struct amdgpu_ctx, refcount);
 484         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 485                 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 486                         if (!ctx->entities[i][j])
 487                                 continue;
 488
 489                         drm_sched_entity_destroy(&ctx->entities[i][j]->entity);
 490                 }
 491         }
 492
 493         amdgpu_ctx_fini(ref);
 494 }
 495
 496 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
 497 {
 498         struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
 499         struct amdgpu_ctx *ctx;
 500
 501         mutex_lock(&mgr->lock);
 502         ctx = idr_remove(&mgr->ctx_handles, id);
 503         if (ctx)
 504                 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
 505         mutex_unlock(&mgr->lock);
 506         return ctx ? 0 : -EINVAL;
 507 }
 508
 509 static int amdgpu_ctx_query(struct amdgpu_device *adev,
 510                             struct amdgpu_fpriv *fpriv, uint32_t id,
 511                             union drm_amdgpu_ctx_out *out)
 512 {
 513         struct amdgpu_ctx *ctx;
 514         struct amdgpu_ctx_mgr *mgr;
 515         unsigned reset_counter;
 516
 517         if (!fpriv)
 518                 return -EINVAL;
 519
 520         mgr = &fpriv->ctx_mgr;
 521         mutex_lock(&mgr->lock);
 522         ctx = idr_find(&mgr->ctx_handles, id);
 523         if (!ctx) {
 524                 mutex_unlock(&mgr->lock);
 525                 return -EINVAL;
 526         }
 527
 528         /* TODO: these two are always zero */
 529         out->state.flags = 0x0;
 530         out->state.hangs = 0x0;
 531
 532         /* determine if a GPU reset has occured since the last call */
 533         reset_counter = atomic_read(&adev->gpu_reset_counter);
 534         /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
 535         if (ctx->reset_counter_query == reset_counter)
 536                 out->state.reset_status = AMDGPU_CTX_NO_RESET;
 537         else
 538                 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
 539         ctx->reset_counter_query = reset_counter;
 540
 541         mutex_unlock(&mgr->lock);
 542         return 0;
 543 }
 544
 545 #define AMDGPU_RAS_COUNTE_DELAY_MS 3000
 546
 547 static int amdgpu_ctx_query2(struct amdgpu_device *adev,
 548                              struct amdgpu_fpriv *fpriv, uint32_t id,
 549                              union drm_amdgpu_ctx_out *out)
 550 {
 551         struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 552         struct amdgpu_ctx *ctx;
 553         struct amdgpu_ctx_mgr *mgr;
 554
 555         if (!fpriv)
 556                 return -EINVAL;
 557
 558         mgr = &fpriv->ctx_mgr;
 559         mutex_lock(&mgr->lock);
 560         ctx = idr_find(&mgr->ctx_handles, id);
 561         if (!ctx) {
 562                 mutex_unlock(&mgr->lock);
 563                 return -EINVAL;
 564         }
 565
 566         out->state.flags = 0x0;
 567         out->state.hangs = 0x0;
 568
 569         if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
 570                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
 571
 572         if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
 573                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
 574
 575         if (atomic_read(&ctx->guilty))
 576                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
 577
 578         if (adev->ras_enabled && con) {
 579                 /* Return the cached values in O(1),
 580                  * and schedule delayed work to cache
 581                  * new vaues.
 582                  */
 583                 int ce_count, ue_count;
 584
 585                 ce_count = atomic_read(&con->ras_ce_count);
 586                 ue_count = atomic_read(&con->ras_ue_count);
 587
 588                 if (ce_count != ctx->ras_counter_ce) {
 589                         ctx->ras_counter_ce = ce_count;
 590                         out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_CE;
 591                 }
 592
 593                 if (ue_count != ctx->ras_counter_ue) {
 594                         ctx->ras_counter_ue = ue_count;
 595                         out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_UE;
 596                 }
 597
 598                 schedule_delayed_work(&con->ras_counte_delay_work,
 599                                       msecs_to_jiffies(AMDGPU_RAS_COUNTE_DELAY_MS));
 600         }
 601
 602         mutex_unlock(&mgr->lock);
 603         return 0;
 604 }
 605
 606
 607
 608 static int amdgpu_ctx_stable_pstate(struct amdgpu_device *adev,
 609                                     struct amdgpu_fpriv *fpriv, uint32_t id,
 610                                     bool set, u32 *stable_pstate)
 611 {
 612         struct amdgpu_ctx *ctx;
 613         struct amdgpu_ctx_mgr *mgr;
 614         int r;
 615
 616         if (!fpriv)
 617                 return -EINVAL;
 618
 619         mgr = &fpriv->ctx_mgr;
 620         mutex_lock(&mgr->lock);
 621         ctx = idr_find(&mgr->ctx_handles, id);
 622         if (!ctx) {
 623                 mutex_unlock(&mgr->lock);
 624                 return -EINVAL;
 625         }
 626
 627         if (set)
 628                 r = amdgpu_ctx_set_stable_pstate(ctx, *stable_pstate);
 629         else
 630                 r = amdgpu_ctx_get_stable_pstate(ctx, stable_pstate);
 631
 632         mutex_unlock(&mgr->lock);
 633         return r;
 634 }
 635
 636 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
 637                      struct drm_file *filp)
 638 {
 639         int r;
 640         uint32_t id, stable_pstate;
 641         int32_t priority;
 642
 643         union drm_amdgpu_ctx *args = data;
 644         struct amdgpu_device *adev = drm_to_adev(dev);
 645         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 646
 647         id = args->in.ctx_id;
 648         priority = args->in.priority;
 649
 650         /* For backwards compatibility reasons, we need to accept
 651          * ioctls with garbage in the priority field */
 652         if (!amdgpu_ctx_priority_is_valid(priority))
 653                 priority = AMDGPU_CTX_PRIORITY_NORMAL;
 654
 655         switch (args->in.op) {
 656         case AMDGPU_CTX_OP_ALLOC_CTX:
 657                 r = amdgpu_ctx_alloc(adev, fpriv, filp, priority, &id);
 658                 args->out.alloc.ctx_id = id;
 659                 break;
 660         case AMDGPU_CTX_OP_FREE_CTX:
 661                 r = amdgpu_ctx_free(fpriv, id);
 662                 break;
 663         case AMDGPU_CTX_OP_QUERY_STATE:
 664                 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
 665                 break;
 666         case AMDGPU_CTX_OP_QUERY_STATE2:
 667                 r = amdgpu_ctx_query2(adev, fpriv, id, &args->out);
 668                 break;
 669         case AMDGPU_CTX_OP_GET_STABLE_PSTATE:
 670                 if (args->in.flags)
 671                         return -EINVAL;
 672                 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, false, &stable_pstate);
 673                 if (!r)
 674                         args->out.pstate.flags = stable_pstate;
 675                 break;
 676         case AMDGPU_CTX_OP_SET_STABLE_PSTATE:
 677                 if (args->in.flags & ~AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK)
 678                         return -EINVAL;
 679                 stable_pstate = args->in.flags & AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK;
 680                 if (stable_pstate > AMDGPU_CTX_STABLE_PSTATE_PEAK)
 681                         return -EINVAL;
 682                 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, true, &stable_pstate);
 683                 break;
 684         default:
 685                 return -EINVAL;
 686         }
 687
 688         return r;
 689 }
 690
 691 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
 692 {
 693         struct amdgpu_ctx *ctx;
 694         struct amdgpu_ctx_mgr *mgr;
 695
 696         if (!fpriv)
 697                 return NULL;
 698
 699         mgr = &fpriv->ctx_mgr;
 700
 701         mutex_lock(&mgr->lock);
 702         ctx = idr_find(&mgr->ctx_handles, id);
 703         if (ctx)
 704                 kref_get(&ctx->refcount);
 705         mutex_unlock(&mgr->lock);
 706         return ctx;
 707 }
 708
 709 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
 710 {
 711         if (ctx == NULL)
 712                 return -EINVAL;
 713
 714         kref_put(&ctx->refcount, amdgpu_ctx_do_release);
 715         return 0;
 716 }
 717
 718 uint64_t amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
 719                               struct drm_sched_entity *entity,
 720                               struct dma_fence *fence)
 721 {
 722         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 723         uint64_t seq = centity->sequence;
 724         struct dma_fence *other = NULL;
 725         unsigned idx = 0;
 726
 727         idx = seq & (amdgpu_sched_jobs - 1);
 728         other = centity->fences[idx];
 729         WARN_ON(other && !dma_fence_is_signaled(other));
 730
 731         dma_fence_get(fence);
 732
 733         spin_lock(&ctx->ring_lock);
 734         centity->fences[idx] = fence;
 735         centity->sequence++;
 736         spin_unlock(&ctx->ring_lock);
 737
 738         atomic64_add(ktime_to_ns(amdgpu_ctx_fence_time(other)),
 739                      &ctx->mgr->time_spend[centity->hw_ip]);
 740
 741         dma_fence_put(other);
 742         return seq;
 743 }
 744
 745 struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
 746                                        struct drm_sched_entity *entity,
 747                                        uint64_t seq)
 748 {
 749         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 750         struct dma_fence *fence;
 751
 752         spin_lock(&ctx->ring_lock);
 753
 754         if (seq == ~0ull)
 755                 seq = centity->sequence - 1;
 756
 757         if (seq >= centity->sequence) {
 758                 spin_unlock(&ctx->ring_lock);
 759                 return ERR_PTR(-EINVAL);
 760         }
 761
 762
 763         if (seq + amdgpu_sched_jobs < centity->sequence) {
 764                 spin_unlock(&ctx->ring_lock);
 765                 return NULL;
 766         }
 767
 768         fence = dma_fence_get(centity->fences[seq & (amdgpu_sched_jobs - 1)]);
 769         spin_unlock(&ctx->ring_lock);
 770
 771         return fence;
 772 }
 773
 774 static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
 775                                            struct amdgpu_ctx_entity *aentity,
 776                                            int hw_ip,
 777                                            int32_t priority)
 778 {
 779         struct amdgpu_device *adev = ctx->mgr->adev;
 780         unsigned int hw_prio;
 781         struct drm_gpu_scheduler **scheds = NULL;
 782         unsigned num_scheds;
 783
 784         /* set sw priority */
 785         drm_sched_entity_set_priority(&aentity->entity,
 786                                       amdgpu_ctx_to_drm_sched_prio(priority));
 787
 788         /* set hw priority */
 789         if (hw_ip == AMDGPU_HW_IP_COMPUTE || hw_ip == AMDGPU_HW_IP_GFX) {
 790                 hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
 791                 hw_prio = array_index_nospec(hw_prio, AMDGPU_RING_PRIO_MAX);
 792                 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
 793                 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 794                 drm_sched_entity_modify_sched(&aentity->entity, scheds,
 795                                               num_scheds);
 796         }
 797 }
 798
 799 void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
 800                                   int32_t priority)
 801 {
 802         int32_t ctx_prio;
 803         unsigned i, j;
 804
 805         ctx->override_priority = priority;
 806
 807         ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
 808                         ctx->init_priority : ctx->override_priority;
 809         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 810                 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 811                         if (!ctx->entities[i][j])
 812                                 continue;
 813
 814                         amdgpu_ctx_set_entity_priority(ctx, ctx->entities[i][j],
 815                                                        i, ctx_prio);
 816                 }
 817         }
 818 }
 819
 820 int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
 821                                struct drm_sched_entity *entity)
 822 {
 823         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 824         struct dma_fence *other;
 825         unsigned idx;
 826         long r;
 827
 828         spin_lock(&ctx->ring_lock);
 829         idx = centity->sequence & (amdgpu_sched_jobs - 1);
 830         other = dma_fence_get(centity->fences[idx]);
 831         spin_unlock(&ctx->ring_lock);
 832
 833         if (!other)
 834                 return 0;
 835
 836         r = dma_fence_wait(other, true);
 837         if (r < 0 && r != -ERESTARTSYS)
 838                 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
 839
 840         dma_fence_put(other);
 841         return r;
 842 }
 843
 844 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr,
 845                          struct amdgpu_device *adev)
 846 {
 847         unsigned int i;
 848
 849         mgr->adev = adev;
 850         mutex_init(&mgr->lock);
 851         idr_init(&mgr->ctx_handles);
 852
 853         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i)
 854                 atomic64_set(&mgr->time_spend[i], 0);
 855 }
 856
 857 long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
 858 {
 859         struct amdgpu_ctx *ctx;
 860         struct idr *idp;
 861         uint32_t id, i, j;
 862
 863         idp = &mgr->ctx_handles;
 864
 865         mutex_lock(&mgr->lock);
 866         idr_for_each_entry(idp, ctx, id) {
 867                 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 868                         for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 869                                 struct drm_sched_entity *entity;
 870
 871                                 if (!ctx->entities[i][j])
 872                                         continue;
 873
 874                                 entity = &ctx->entities[i][j]->entity;
 875                                 timeout = drm_sched_entity_flush(entity, timeout);
 876                         }
 877                 }
 878         }
 879         mutex_unlock(&mgr->lock);
 880         return timeout;
 881 }
 882
 883 void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
 884 {
 885         struct amdgpu_ctx *ctx;
 886         struct idr *idp;
 887         uint32_t id, i, j;
 888
 889         idp = &mgr->ctx_handles;
 890
 891         idr_for_each_entry(idp, ctx, id) {
 892                 if (kref_read(&ctx->refcount) != 1) {
 893                         DRM_ERROR("ctx %p is still alive\n", ctx);
 894                         continue;
 895                 }
 896
 897                 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 898                         for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 899                                 struct drm_sched_entity *entity;
 900
 901                                 if (!ctx->entities[i][j])
 902                                         continue;
 903
 904                                 entity = &ctx->entities[i][j]->entity;
 905                                 drm_sched_entity_fini(entity);
 906                         }
 907                 }
 908         }
 909 }
 910
 911 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
 912 {
 913         struct amdgpu_ctx *ctx;
 914         struct idr *idp;
 915         uint32_t id;
 916
 917         amdgpu_ctx_mgr_entity_fini(mgr);
 918
 919         idp = &mgr->ctx_handles;
 920
 921         idr_for_each_entry(idp, ctx, id) {
 922                 if (kref_put(&ctx->refcount, amdgpu_ctx_fini) != 1)
 923                         DRM_ERROR("ctx %p is still alive\n", ctx);
 924         }
 925
 926         idr_destroy(&mgr->ctx_handles);
 927         mutex_destroy(&mgr->lock);
 928 }
 929
 930 void amdgpu_ctx_mgr_usage(struct amdgpu_ctx_mgr *mgr,
 931                           ktime_t usage[AMDGPU_HW_IP_NUM])
 932 {
 933         struct amdgpu_ctx *ctx;
 934         unsigned int hw_ip, i;
 935         uint32_t id;
 936
 937         /*
 938          * This is a little bit racy because it can be that a ctx or a fence are
 939          * destroyed just in the moment we try to account them. But that is ok
 940          * since exactly that case is explicitely allowed by the interface.
 941          */
 942         mutex_lock(&mgr->lock);
 943         for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
 944                 uint64_t ns = atomic64_read(&mgr->time_spend[hw_ip]);
 945
 946                 usage[hw_ip] = ns_to_ktime(ns);
 947         }
 948
 949         idr_for_each_entry(&mgr->ctx_handles, ctx, id) {
 950                 for (hw_ip = 0; hw_ip < AMDGPU_HW_IP_NUM; ++hw_ip) {
 951                         for (i = 0; i < amdgpu_ctx_num_entities[hw_ip]; ++i) {
 952                                 struct amdgpu_ctx_entity *centity;
 953                                 ktime_t spend;
 954
 955                                 centity = ctx->entities[hw_ip][i];
 956                                 if (!centity)
 957                                         continue;
 958                                 spend = amdgpu_ctx_entity_time(ctx, centity);
 959                                 usage[hw_ip] = ktime_add(usage[hw_ip], spend);
 960                         }
 961                 }
 962         }
 963         mutex_unlock(&mgr->lock);
 964 }