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 <monk.liu@amd.com>
  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_compute_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->adev;
 139         int32_t ctx_prio;
 140         unsigned int hw_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_COMPUTE:
 147                 hw_prio = amdgpu_ctx_prio_to_compute_prio(ctx_prio);
 148                 break;
 149         case AMDGPU_HW_IP_VCE:
 150         case AMDGPU_HW_IP_VCN_ENC:
 151                 hw_prio = amdgpu_ctx_sched_prio_to_ring_prio(ctx_prio);
 152                 break;
 153         default:
 154                 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
 155                 break;
 156         }
 157
 158         hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
 159         if (adev->gpu_sched[hw_ip][hw_prio].num_scheds == 0)
 160                 hw_prio = AMDGPU_RING_PRIO_DEFAULT;
 161
 162         return hw_prio;
 163 }
 164
 165
 166 static int amdgpu_ctx_init_entity(struct amdgpu_ctx *ctx, u32 hw_ip,
 167                                   const u32 ring)
 168 {
 169         struct amdgpu_device *adev = ctx->adev;
 170         struct amdgpu_ctx_entity *entity;
 171         struct drm_gpu_scheduler **scheds = NULL, *sched = NULL;
 172         unsigned num_scheds = 0;
 173         int32_t ctx_prio;
 174         unsigned int hw_prio;
 175         enum drm_sched_priority drm_prio;
 176         int r;
 177
 178         entity = kzalloc(struct_size(entity, fences, amdgpu_sched_jobs),
 179                          GFP_KERNEL);
 180         if (!entity)
 181                 return  -ENOMEM;
 182
 183         ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
 184                         ctx->init_priority : ctx->override_priority;
 185         entity->sequence = 1;
 186         hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
 187         drm_prio = amdgpu_ctx_to_drm_sched_prio(ctx_prio);
 188
 189         hw_ip = array_index_nospec(hw_ip, AMDGPU_HW_IP_NUM);
 190         scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
 191         num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 192
 193         /* disable load balance if the hw engine retains context among dependent jobs */
 194         if (hw_ip == AMDGPU_HW_IP_VCN_ENC ||
 195             hw_ip == AMDGPU_HW_IP_VCN_DEC ||
 196             hw_ip == AMDGPU_HW_IP_UVD_ENC ||
 197             hw_ip == AMDGPU_HW_IP_UVD) {
 198                 sched = drm_sched_pick_best(scheds, num_scheds);
 199                 scheds = &sched;
 200                 num_scheds = 1;
 201         }
 202
 203         r = drm_sched_entity_init(&entity->entity, drm_prio, scheds, num_scheds,
 204                                   &ctx->guilty);
 205         if (r)
 206                 goto error_free_entity;
 207
 208         /* It's not an error if we fail to install the new entity */
 209         if (cmpxchg(&ctx->entities[hw_ip][ring], NULL, entity))
 210                 goto cleanup_entity;
 211
 212         return 0;
 213
 214 cleanup_entity:
 215         drm_sched_entity_fini(&entity->entity);
 216
 217 error_free_entity:
 218         kfree(entity);
 219
 220         return r;
 221 }
 222
 223 static int amdgpu_ctx_init(struct amdgpu_device *adev,
 224                            int32_t priority,
 225                            struct drm_file *filp,
 226                            struct amdgpu_ctx *ctx)
 227 {
 228         int r;
 229
 230         r = amdgpu_ctx_priority_permit(filp, priority);
 231         if (r)
 232                 return r;
 233
 234         memset(ctx, 0, sizeof(*ctx));
 235
 236         ctx->adev = adev;
 237
 238         kref_init(&ctx->refcount);
 239         spin_lock_init(&ctx->ring_lock);
 240
 241         ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
 242         ctx->reset_counter_query = ctx->reset_counter;
 243         ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
 244         ctx->init_priority = priority;
 245         ctx->override_priority = AMDGPU_CTX_PRIORITY_UNSET;
 246         ctx->stable_pstate = AMDGPU_CTX_STABLE_PSTATE_NONE;
 247
 248         return 0;
 249 }
 250
 251 static void amdgpu_ctx_fini_entity(struct amdgpu_ctx_entity *entity)
 252 {
 253
 254         int i;
 255
 256         if (!entity)
 257                 return;
 258
 259         for (i = 0; i < amdgpu_sched_jobs; ++i)
 260                 dma_fence_put(entity->fences[i]);
 261
 262         kfree(entity);
 263 }
 264
 265 static int amdgpu_ctx_get_stable_pstate(struct amdgpu_ctx *ctx,
 266                                         u32 *stable_pstate)
 267 {
 268         struct amdgpu_device *adev = ctx->adev;
 269         enum amd_dpm_forced_level current_level;
 270
 271         current_level = amdgpu_dpm_get_performance_level(adev);
 272
 273         switch (current_level) {
 274         case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
 275                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_STANDARD;
 276                 break;
 277         case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK:
 278                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK;
 279                 break;
 280         case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK:
 281                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK;
 282                 break;
 283         case AMD_DPM_FORCED_LEVEL_PROFILE_PEAK:
 284                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_PEAK;
 285                 break;
 286         default:
 287                 *stable_pstate = AMDGPU_CTX_STABLE_PSTATE_NONE;
 288                 break;
 289         }
 290         return 0;
 291 }
 292
 293 static int amdgpu_ctx_set_stable_pstate(struct amdgpu_ctx *ctx,
 294                                         u32 stable_pstate)
 295 {
 296         struct amdgpu_device *adev = ctx->adev;
 297         enum amd_dpm_forced_level level;
 298         int r;
 299
 300         mutex_lock(&adev->pm.stable_pstate_ctx_lock);
 301         if (adev->pm.stable_pstate_ctx && adev->pm.stable_pstate_ctx != ctx) {
 302                 r = -EBUSY;
 303                 goto done;
 304         }
 305
 306         switch (stable_pstate) {
 307         case AMDGPU_CTX_STABLE_PSTATE_NONE:
 308                 level = AMD_DPM_FORCED_LEVEL_AUTO;
 309                 break;
 310         case AMDGPU_CTX_STABLE_PSTATE_STANDARD:
 311                 level = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD;
 312                 break;
 313         case AMDGPU_CTX_STABLE_PSTATE_MIN_SCLK:
 314                 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK;
 315                 break;
 316         case AMDGPU_CTX_STABLE_PSTATE_MIN_MCLK:
 317                 level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
 318                 break;
 319         case AMDGPU_CTX_STABLE_PSTATE_PEAK:
 320                 level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
 321                 break;
 322         default:
 323                 r = -EINVAL;
 324                 goto done;
 325         }
 326
 327         r = amdgpu_dpm_force_performance_level(adev, level);
 328
 329         if (level == AMD_DPM_FORCED_LEVEL_AUTO)
 330                 adev->pm.stable_pstate_ctx = NULL;
 331         else
 332                 adev->pm.stable_pstate_ctx = ctx;
 333 done:
 334         mutex_unlock(&adev->pm.stable_pstate_ctx_lock);
 335
 336         return r;
 337 }
 338
 339 static void amdgpu_ctx_fini(struct kref *ref)
 340 {
 341         struct amdgpu_ctx *ctx = container_of(ref, struct amdgpu_ctx, refcount);
 342         struct amdgpu_device *adev = ctx->adev;
 343         unsigned i, j, idx;
 344
 345         if (!adev)
 346                 return;
 347
 348         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 349                 for (j = 0; j < AMDGPU_MAX_ENTITY_NUM; ++j) {
 350                         amdgpu_ctx_fini_entity(ctx->entities[i][j]);
 351                         ctx->entities[i][j] = NULL;
 352                 }
 353         }
 354
 355         if (drm_dev_enter(&adev->ddev, &idx)) {
 356                 amdgpu_ctx_set_stable_pstate(ctx, AMDGPU_CTX_STABLE_PSTATE_NONE);
 357                 drm_dev_exit(idx);
 358         }
 359
 360         kfree(ctx);
 361 }
 362
 363 int amdgpu_ctx_get_entity(struct amdgpu_ctx *ctx, u32 hw_ip, u32 instance,
 364                           u32 ring, struct drm_sched_entity **entity)
 365 {
 366         int r;
 367
 368         if (hw_ip >= AMDGPU_HW_IP_NUM) {
 369                 DRM_ERROR("unknown HW IP type: %d\n", hw_ip);
 370                 return -EINVAL;
 371         }
 372
 373         /* Right now all IPs have only one instance - multiple rings. */
 374         if (instance != 0) {
 375                 DRM_DEBUG("invalid ip instance: %d\n", instance);
 376                 return -EINVAL;
 377         }
 378
 379         if (ring >= amdgpu_ctx_num_entities[hw_ip]) {
 380                 DRM_DEBUG("invalid ring: %d %d\n", hw_ip, ring);
 381                 return -EINVAL;
 382         }
 383
 384         if (ctx->entities[hw_ip][ring] == NULL) {
 385                 r = amdgpu_ctx_init_entity(ctx, hw_ip, ring);
 386                 if (r)
 387                         return r;
 388         }
 389
 390         *entity = &ctx->entities[hw_ip][ring]->entity;
 391         return 0;
 392 }
 393
 394 static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
 395                             struct amdgpu_fpriv *fpriv,
 396                             struct drm_file *filp,
 397                             int32_t priority,
 398                             uint32_t *id)
 399 {
 400         struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
 401         struct amdgpu_ctx *ctx;
 402         int r;
 403
 404         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 405         if (!ctx)
 406                 return -ENOMEM;
 407
 408         mutex_lock(&mgr->lock);
 409         r = idr_alloc(&mgr->ctx_handles, ctx, 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);
 410         if (r < 0) {
 411                 mutex_unlock(&mgr->lock);
 412                 kfree(ctx);
 413                 return r;
 414         }
 415
 416         *id = (uint32_t)r;
 417         r = amdgpu_ctx_init(adev, priority, filp, ctx);
 418         if (r) {
 419                 idr_remove(&mgr->ctx_handles, *id);
 420                 *id = 0;
 421                 kfree(ctx);
 422         }
 423         mutex_unlock(&mgr->lock);
 424         return r;
 425 }
 426
 427 static void amdgpu_ctx_do_release(struct kref *ref)
 428 {
 429         struct amdgpu_ctx *ctx;
 430         u32 i, j;
 431
 432         ctx = container_of(ref, struct amdgpu_ctx, refcount);
 433         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 434                 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 435                         if (!ctx->entities[i][j])
 436                                 continue;
 437
 438                         drm_sched_entity_destroy(&ctx->entities[i][j]->entity);
 439                 }
 440         }
 441
 442         amdgpu_ctx_fini(ref);
 443 }
 444
 445 static int amdgpu_ctx_free(struct amdgpu_fpriv *fpriv, uint32_t id)
 446 {
 447         struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
 448         struct amdgpu_ctx *ctx;
 449
 450         mutex_lock(&mgr->lock);
 451         ctx = idr_remove(&mgr->ctx_handles, id);
 452         if (ctx)
 453                 kref_put(&ctx->refcount, amdgpu_ctx_do_release);
 454         mutex_unlock(&mgr->lock);
 455         return ctx ? 0 : -EINVAL;
 456 }
 457
 458 static int amdgpu_ctx_query(struct amdgpu_device *adev,
 459                             struct amdgpu_fpriv *fpriv, uint32_t id,
 460                             union drm_amdgpu_ctx_out *out)
 461 {
 462         struct amdgpu_ctx *ctx;
 463         struct amdgpu_ctx_mgr *mgr;
 464         unsigned reset_counter;
 465
 466         if (!fpriv)
 467                 return -EINVAL;
 468
 469         mgr = &fpriv->ctx_mgr;
 470         mutex_lock(&mgr->lock);
 471         ctx = idr_find(&mgr->ctx_handles, id);
 472         if (!ctx) {
 473                 mutex_unlock(&mgr->lock);
 474                 return -EINVAL;
 475         }
 476
 477         /* TODO: these two are always zero */
 478         out->state.flags = 0x0;
 479         out->state.hangs = 0x0;
 480
 481         /* determine if a GPU reset has occured since the last call */
 482         reset_counter = atomic_read(&adev->gpu_reset_counter);
 483         /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
 484         if (ctx->reset_counter_query == reset_counter)
 485                 out->state.reset_status = AMDGPU_CTX_NO_RESET;
 486         else
 487                 out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
 488         ctx->reset_counter_query = reset_counter;
 489
 490         mutex_unlock(&mgr->lock);
 491         return 0;
 492 }
 493
 494 #define AMDGPU_RAS_COUNTE_DELAY_MS 3000
 495
 496 static int amdgpu_ctx_query2(struct amdgpu_device *adev,
 497                              struct amdgpu_fpriv *fpriv, uint32_t id,
 498                              union drm_amdgpu_ctx_out *out)
 499 {
 500         struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 501         struct amdgpu_ctx *ctx;
 502         struct amdgpu_ctx_mgr *mgr;
 503
 504         if (!fpriv)
 505                 return -EINVAL;
 506
 507         mgr = &fpriv->ctx_mgr;
 508         mutex_lock(&mgr->lock);
 509         ctx = idr_find(&mgr->ctx_handles, id);
 510         if (!ctx) {
 511                 mutex_unlock(&mgr->lock);
 512                 return -EINVAL;
 513         }
 514
 515         out->state.flags = 0x0;
 516         out->state.hangs = 0x0;
 517
 518         if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
 519                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
 520
 521         if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
 522                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
 523
 524         if (atomic_read(&ctx->guilty))
 525                 out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_GUILTY;
 526
 527         if (adev->ras_enabled && con) {
 528                 /* Return the cached values in O(1),
 529                  * and schedule delayed work to cache
 530                  * new vaues.
 531                  */
 532                 int ce_count, ue_count;
 533
 534                 ce_count = atomic_read(&con->ras_ce_count);
 535                 ue_count = atomic_read(&con->ras_ue_count);
 536
 537                 if (ce_count != ctx->ras_counter_ce) {
 538                         ctx->ras_counter_ce = ce_count;
 539                         out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_CE;
 540                 }
 541
 542                 if (ue_count != ctx->ras_counter_ue) {
 543                         ctx->ras_counter_ue = ue_count;
 544                         out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RAS_UE;
 545                 }
 546
 547                 schedule_delayed_work(&con->ras_counte_delay_work,
 548                                       msecs_to_jiffies(AMDGPU_RAS_COUNTE_DELAY_MS));
 549         }
 550
 551         mutex_unlock(&mgr->lock);
 552         return 0;
 553 }
 554
 555
 556
 557 static int amdgpu_ctx_stable_pstate(struct amdgpu_device *adev,
 558                                     struct amdgpu_fpriv *fpriv, uint32_t id,
 559                                     bool set, u32 *stable_pstate)
 560 {
 561         struct amdgpu_ctx *ctx;
 562         struct amdgpu_ctx_mgr *mgr;
 563         int r;
 564
 565         if (!fpriv)
 566                 return -EINVAL;
 567
 568         mgr = &fpriv->ctx_mgr;
 569         mutex_lock(&mgr->lock);
 570         ctx = idr_find(&mgr->ctx_handles, id);
 571         if (!ctx) {
 572                 mutex_unlock(&mgr->lock);
 573                 return -EINVAL;
 574         }
 575
 576         if (set)
 577                 r = amdgpu_ctx_set_stable_pstate(ctx, *stable_pstate);
 578         else
 579                 r = amdgpu_ctx_get_stable_pstate(ctx, stable_pstate);
 580
 581         mutex_unlock(&mgr->lock);
 582         return r;
 583 }
 584
 585 int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
 586                      struct drm_file *filp)
 587 {
 588         int r;
 589         uint32_t id, stable_pstate;
 590         int32_t priority;
 591
 592         union drm_amdgpu_ctx *args = data;
 593         struct amdgpu_device *adev = drm_to_adev(dev);
 594         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 595
 596         id = args->in.ctx_id;
 597         priority = args->in.priority;
 598
 599         /* For backwards compatibility reasons, we need to accept
 600          * ioctls with garbage in the priority field */
 601         if (!amdgpu_ctx_priority_is_valid(priority))
 602                 priority = AMDGPU_CTX_PRIORITY_NORMAL;
 603
 604         switch (args->in.op) {
 605         case AMDGPU_CTX_OP_ALLOC_CTX:
 606                 r = amdgpu_ctx_alloc(adev, fpriv, filp, priority, &id);
 607                 args->out.alloc.ctx_id = id;
 608                 break;
 609         case AMDGPU_CTX_OP_FREE_CTX:
 610                 r = amdgpu_ctx_free(fpriv, id);
 611                 break;
 612         case AMDGPU_CTX_OP_QUERY_STATE:
 613                 r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
 614                 break;
 615         case AMDGPU_CTX_OP_QUERY_STATE2:
 616                 r = amdgpu_ctx_query2(adev, fpriv, id, &args->out);
 617                 break;
 618         case AMDGPU_CTX_OP_GET_STABLE_PSTATE:
 619                 if (args->in.flags)
 620                         return -EINVAL;
 621                 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, false, &stable_pstate);
 622                 if (!r)
 623                         args->out.pstate.flags = stable_pstate;
 624                 break;
 625         case AMDGPU_CTX_OP_SET_STABLE_PSTATE:
 626                 if (args->in.flags & ~AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK)
 627                         return -EINVAL;
 628                 stable_pstate = args->in.flags & AMDGPU_CTX_STABLE_PSTATE_FLAGS_MASK;
 629                 if (stable_pstate > AMDGPU_CTX_STABLE_PSTATE_PEAK)
 630                         return -EINVAL;
 631                 r = amdgpu_ctx_stable_pstate(adev, fpriv, id, true, &stable_pstate);
 632                 break;
 633         default:
 634                 return -EINVAL;
 635         }
 636
 637         return r;
 638 }
 639
 640 struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
 641 {
 642         struct amdgpu_ctx *ctx;
 643         struct amdgpu_ctx_mgr *mgr;
 644
 645         if (!fpriv)
 646                 return NULL;
 647
 648         mgr = &fpriv->ctx_mgr;
 649
 650         mutex_lock(&mgr->lock);
 651         ctx = idr_find(&mgr->ctx_handles, id);
 652         if (ctx)
 653                 kref_get(&ctx->refcount);
 654         mutex_unlock(&mgr->lock);
 655         return ctx;
 656 }
 657
 658 int amdgpu_ctx_put(struct amdgpu_ctx *ctx)
 659 {
 660         if (ctx == NULL)
 661                 return -EINVAL;
 662
 663         kref_put(&ctx->refcount, amdgpu_ctx_do_release);
 664         return 0;
 665 }
 666
 667 void amdgpu_ctx_add_fence(struct amdgpu_ctx *ctx,
 668                           struct drm_sched_entity *entity,
 669                           struct dma_fence *fence, uint64_t *handle)
 670 {
 671         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 672         uint64_t seq = centity->sequence;
 673         struct dma_fence *other = NULL;
 674         unsigned idx = 0;
 675
 676         idx = seq & (amdgpu_sched_jobs - 1);
 677         other = centity->fences[idx];
 678         if (other)
 679                 BUG_ON(!dma_fence_is_signaled(other));
 680
 681         dma_fence_get(fence);
 682
 683         spin_lock(&ctx->ring_lock);
 684         centity->fences[idx] = fence;
 685         centity->sequence++;
 686         spin_unlock(&ctx->ring_lock);
 687
 688         dma_fence_put(other);
 689         if (handle)
 690                 *handle = seq;
 691 }
 692
 693 struct dma_fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
 694                                        struct drm_sched_entity *entity,
 695                                        uint64_t seq)
 696 {
 697         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 698         struct dma_fence *fence;
 699
 700         spin_lock(&ctx->ring_lock);
 701
 702         if (seq == ~0ull)
 703                 seq = centity->sequence - 1;
 704
 705         if (seq >= centity->sequence) {
 706                 spin_unlock(&ctx->ring_lock);
 707                 return ERR_PTR(-EINVAL);
 708         }
 709
 710
 711         if (seq + amdgpu_sched_jobs < centity->sequence) {
 712                 spin_unlock(&ctx->ring_lock);
 713                 return NULL;
 714         }
 715
 716         fence = dma_fence_get(centity->fences[seq & (amdgpu_sched_jobs - 1)]);
 717         spin_unlock(&ctx->ring_lock);
 718
 719         return fence;
 720 }
 721
 722 static void amdgpu_ctx_set_entity_priority(struct amdgpu_ctx *ctx,
 723                                            struct amdgpu_ctx_entity *aentity,
 724                                            int hw_ip,
 725                                            int32_t priority)
 726 {
 727         struct amdgpu_device *adev = ctx->adev;
 728         unsigned int hw_prio;
 729         struct drm_gpu_scheduler **scheds = NULL;
 730         unsigned num_scheds;
 731
 732         /* set sw priority */
 733         drm_sched_entity_set_priority(&aentity->entity,
 734                                       amdgpu_ctx_to_drm_sched_prio(priority));
 735
 736         /* set hw priority */
 737         if (hw_ip == AMDGPU_HW_IP_COMPUTE) {
 738                 hw_prio = amdgpu_ctx_get_hw_prio(ctx, hw_ip);
 739                 hw_prio = array_index_nospec(hw_prio, AMDGPU_RING_PRIO_MAX);
 740                 scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
 741                 num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 742                 drm_sched_entity_modify_sched(&aentity->entity, scheds,
 743                                               num_scheds);
 744         }
 745 }
 746
 747 void amdgpu_ctx_priority_override(struct amdgpu_ctx *ctx,
 748                                   int32_t priority)
 749 {
 750         int32_t ctx_prio;
 751         unsigned i, j;
 752
 753         ctx->override_priority = priority;
 754
 755         ctx_prio = (ctx->override_priority == AMDGPU_CTX_PRIORITY_UNSET) ?
 756                         ctx->init_priority : ctx->override_priority;
 757         for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 758                 for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 759                         if (!ctx->entities[i][j])
 760                                 continue;
 761
 762                         amdgpu_ctx_set_entity_priority(ctx, ctx->entities[i][j],
 763                                                        i, ctx_prio);
 764                 }
 765         }
 766 }
 767
 768 int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
 769                                struct drm_sched_entity *entity)
 770 {
 771         struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
 772         struct dma_fence *other;
 773         unsigned idx;
 774         long r;
 775
 776         spin_lock(&ctx->ring_lock);
 777         idx = centity->sequence & (amdgpu_sched_jobs - 1);
 778         other = dma_fence_get(centity->fences[idx]);
 779         spin_unlock(&ctx->ring_lock);
 780
 781         if (!other)
 782                 return 0;
 783
 784         r = dma_fence_wait(other, true);
 785         if (r < 0 && r != -ERESTARTSYS)
 786                 DRM_ERROR("Error (%ld) waiting for fence!\n", r);
 787
 788         dma_fence_put(other);
 789         return r;
 790 }
 791
 792 void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)
 793 {
 794         mutex_init(&mgr->lock);
 795         idr_init(&mgr->ctx_handles);
 796 }
 797
 798 long amdgpu_ctx_mgr_entity_flush(struct amdgpu_ctx_mgr *mgr, long timeout)
 799 {
 800         struct amdgpu_ctx *ctx;
 801         struct idr *idp;
 802         uint32_t id, i, j;
 803
 804         idp = &mgr->ctx_handles;
 805
 806         mutex_lock(&mgr->lock);
 807         idr_for_each_entry(idp, ctx, id) {
 808                 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 809                         for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 810                                 struct drm_sched_entity *entity;
 811
 812                                 if (!ctx->entities[i][j])
 813                                         continue;
 814
 815                                 entity = &ctx->entities[i][j]->entity;
 816                                 timeout = drm_sched_entity_flush(entity, timeout);
 817                         }
 818                 }
 819         }
 820         mutex_unlock(&mgr->lock);
 821         return timeout;
 822 }
 823
 824 void amdgpu_ctx_mgr_entity_fini(struct amdgpu_ctx_mgr *mgr)
 825 {
 826         struct amdgpu_ctx *ctx;
 827         struct idr *idp;
 828         uint32_t id, i, j;
 829
 830         idp = &mgr->ctx_handles;
 831
 832         idr_for_each_entry(idp, ctx, id) {
 833                 if (kref_read(&ctx->refcount) != 1) {
 834                         DRM_ERROR("ctx %p is still alive\n", ctx);
 835                         continue;
 836                 }
 837
 838                 for (i = 0; i < AMDGPU_HW_IP_NUM; ++i) {
 839                         for (j = 0; j < amdgpu_ctx_num_entities[i]; ++j) {
 840                                 struct drm_sched_entity *entity;
 841
 842                                 if (!ctx->entities[i][j])
 843                                         continue;
 844
 845                                 entity = &ctx->entities[i][j]->entity;
 846                                 drm_sched_entity_fini(entity);
 847                         }
 848                 }
 849         }
 850 }
 851
 852 void amdgpu_ctx_mgr_fini(struct amdgpu_ctx_mgr *mgr)
 853 {
 854         struct amdgpu_ctx *ctx;
 855         struct idr *idp;
 856         uint32_t id;
 857
 858         amdgpu_ctx_mgr_entity_fini(mgr);
 859
 860         idp = &mgr->ctx_handles;
 861
 862         idr_for_each_entry(idp, ctx, id) {
 863                 if (kref_put(&ctx->refcount, amdgpu_ctx_fini) != 1)
 864                         DRM_ERROR("ctx %p is still alive\n", ctx);
 865         }
 866
 867         idr_destroy(&mgr->ctx_handles);
 868         mutex_destroy(&mgr->lock);
 869 }
 870
 871 static void amdgpu_ctx_fence_time(struct amdgpu_ctx *ctx,
 872                 struct amdgpu_ctx_entity *centity, ktime_t *total, ktime_t *max)
 873 {
 874         ktime_t now, t1;
 875         uint32_t i;
 876
 877         *total = *max = 0;
 878
 879         now = ktime_get();
 880         for (i = 0; i < amdgpu_sched_jobs; i++) {
 881                 struct dma_fence *fence;
 882                 struct drm_sched_fence *s_fence;
 883
 884                 spin_lock(&ctx->ring_lock);
 885                 fence = dma_fence_get(centity->fences[i]);
 886                 spin_unlock(&ctx->ring_lock);
 887                 if (!fence)
 888                         continue;
 889                 s_fence = to_drm_sched_fence(fence);
 890                 if (!dma_fence_is_signaled(&s_fence->scheduled)) {
 891                         dma_fence_put(fence);
 892                         continue;
 893                 }
 894                 t1 = s_fence->scheduled.timestamp;
 895                 if (!ktime_before(t1, now)) {
 896                         dma_fence_put(fence);
 897                         continue;
 898                 }
 899                 if (dma_fence_is_signaled(&s_fence->finished) &&
 900                         s_fence->finished.timestamp < now)
 901                         *total += ktime_sub(s_fence->finished.timestamp, t1);
 902                 else
 903                         *total += ktime_sub(now, t1);
 904                 t1 = ktime_sub(now, t1);
 905                 dma_fence_put(fence);
 906                 *max = max(t1, *max);
 907         }
 908 }
 909
 910 ktime_t amdgpu_ctx_mgr_fence_usage(struct amdgpu_ctx_mgr *mgr, uint32_t hwip,
 911                 uint32_t idx, uint64_t *elapsed)
 912 {
 913         struct idr *idp;
 914         struct amdgpu_ctx *ctx;
 915         uint32_t id;
 916         struct amdgpu_ctx_entity *centity;
 917         ktime_t total = 0, max = 0;
 918
 919         if (idx >= AMDGPU_MAX_ENTITY_NUM)
 920                 return 0;
 921         idp = &mgr->ctx_handles;
 922         mutex_lock(&mgr->lock);
 923         idr_for_each_entry(idp, ctx, id) {
 924                 ktime_t ttotal, tmax;
 925
 926                 if (!ctx->entities[hwip][idx])
 927                         continue;
 928
 929                 centity = ctx->entities[hwip][idx];
 930                 amdgpu_ctx_fence_time(ctx, centity, &ttotal, &tmax);
 931
 932                 /* Harmonic mean approximation diverges for very small
 933                  * values. If ratio < 0.01% ignore
 934                  */
 935                 if (AMDGPU_CTX_FENCE_USAGE_MIN_RATIO(tmax, ttotal))
 936                         continue;
 937
 938                 total = ktime_add(total, ttotal);
 939                 max = ktime_after(tmax, max) ? tmax : max;
 940         }
 941
 942         mutex_unlock(&mgr->lock);
 943         if (elapsed)
 944                 *elapsed = max;
 945
 946         return total;
 947 }