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

   1 /*
   2  * Copyright 2008 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jerome Glisse <glisse@freedesktop.org>
  26  */
  27
  28 #include <linux/file.h>
  29 #include <linux/pagemap.h>
  30 #include <linux/sync_file.h>
  31 #include <linux/dma-buf.h>
  32
  33 #include <drm/amdgpu_drm.h>
  34 #include <drm/drm_syncobj.h>
  35 #include <drm/ttm/ttm_tt.h>
  36
  37 #include "amdgpu_cs.h"
  38 #include "amdgpu.h"
  39 #include "amdgpu_trace.h"
  40 #include "amdgpu_gmc.h"
  41 #include "amdgpu_gem.h"
  42 #include "amdgpu_ras.h"
  43
  44 static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p,
  45                                  struct amdgpu_device *adev,
  46                                  struct drm_file *filp,
  47                                  union drm_amdgpu_cs *cs)
  48 {
  49         struct amdgpu_fpriv *fpriv = filp->driver_priv;
  50
  51         if (cs->in.num_chunks == 0)
  52                 return -EINVAL;
  53
  54         memset(p, 0, sizeof(*p));
  55         p->adev = adev;
  56         p->filp = filp;
  57
  58         p->ctx = amdgpu_ctx_get(fpriv, cs->in.ctx_id);
  59         if (!p->ctx)
  60                 return -EINVAL;
  61
  62         if (atomic_read(&p->ctx->guilty)) {
  63                 amdgpu_ctx_put(p->ctx);
  64                 return -ECANCELED;
  65         }
  66
  67         amdgpu_sync_create(&p->sync);
  68         drm_exec_init(&p->exec, DRM_EXEC_INTERRUPTIBLE_WAIT |
  69                       DRM_EXEC_IGNORE_DUPLICATES, 0);
  70         return 0;
  71 }
  72
  73 static int amdgpu_cs_job_idx(struct amdgpu_cs_parser *p,
  74                              struct drm_amdgpu_cs_chunk_ib *chunk_ib)
  75 {
  76         struct drm_sched_entity *entity;
  77         unsigned int i;
  78         int r;
  79
  80         r = amdgpu_ctx_get_entity(p->ctx, chunk_ib->ip_type,
  81                                   chunk_ib->ip_instance,
  82                                   chunk_ib->ring, &entity);
  83         if (r)
  84                 return r;
  85
  86         /*
  87          * Abort if there is no run queue associated with this entity.
  88          * Possibly because of disabled HW IP.
  89          */
  90         if (entity->rq == NULL)
  91                 return -EINVAL;
  92
  93         /* Check if we can add this IB to some existing job */
  94         for (i = 0; i < p->gang_size; ++i)
  95                 if (p->entities[i] == entity)
  96                         return i;
  97
  98         /* If not increase the gang size if possible */
  99         if (i == AMDGPU_CS_GANG_SIZE)
 100                 return -EINVAL;
 101
 102         p->entities[i] = entity;
 103         p->gang_size = i + 1;
 104         return i;
 105 }
 106
 107 static int amdgpu_cs_p1_ib(struct amdgpu_cs_parser *p,
 108                            struct drm_amdgpu_cs_chunk_ib *chunk_ib,
 109                            unsigned int *num_ibs)
 110 {
 111         int r;
 112
 113         r = amdgpu_cs_job_idx(p, chunk_ib);
 114         if (r < 0)
 115                 return r;
 116
 117         if (num_ibs[r] >= amdgpu_ring_max_ibs(chunk_ib->ip_type))
 118                 return -EINVAL;
 119
 120         ++(num_ibs[r]);
 121         p->gang_leader_idx = r;
 122         return 0;
 123 }
 124
 125 static int amdgpu_cs_p1_user_fence(struct amdgpu_cs_parser *p,
 126                                    struct drm_amdgpu_cs_chunk_fence *data,
 127                                    uint32_t *offset)
 128 {
 129         struct drm_gem_object *gobj;
 130         unsigned long size;
 131
 132         gobj = drm_gem_object_lookup(p->filp, data->handle);
 133         if (gobj == NULL)
 134                 return -EINVAL;
 135
 136         p->uf_bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 137         drm_gem_object_put(gobj);
 138
 139         size = amdgpu_bo_size(p->uf_bo);
 140         if (size != PAGE_SIZE || data->offset > (size - 8))
 141                 return -EINVAL;
 142
 143         if (amdgpu_ttm_tt_get_usermm(p->uf_bo->tbo.ttm))
 144                 return -EINVAL;
 145
 146         *offset = data->offset;
 147         return 0;
 148 }
 149
 150 static int amdgpu_cs_p1_bo_handles(struct amdgpu_cs_parser *p,
 151                                    struct drm_amdgpu_bo_list_in *data)
 152 {
 153         struct drm_amdgpu_bo_list_entry *info;
 154         int r;
 155
 156         r = amdgpu_bo_create_list_entry_array(data, &info);
 157         if (r)
 158                 return r;
 159
 160         r = amdgpu_bo_list_create(p->adev, p->filp, info, data->bo_number,
 161                                   &p->bo_list);
 162         if (r)
 163                 goto error_free;
 164
 165         kvfree(info);
 166         return 0;
 167
 168 error_free:
 169         kvfree(info);
 170
 171         return r;
 172 }
 173
 174 /* Copy the data from userspace and go over it the first time */
 175 static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
 176                            union drm_amdgpu_cs *cs)
 177 {
 178         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 179         unsigned int num_ibs[AMDGPU_CS_GANG_SIZE] = { };
 180         struct amdgpu_vm *vm = &fpriv->vm;
 181         uint64_t *chunk_array_user;
 182         uint64_t *chunk_array;
 183         uint32_t uf_offset = 0;
 184         size_t size;
 185         int ret;
 186         int i;
 187
 188         chunk_array = kvmalloc_array(cs->in.num_chunks, sizeof(uint64_t),
 189                                      GFP_KERNEL);
 190         if (!chunk_array)
 191                 return -ENOMEM;
 192
 193         /* get chunks */
 194         chunk_array_user = u64_to_user_ptr(cs->in.chunks);
 195         if (copy_from_user(chunk_array, chunk_array_user,
 196                            sizeof(uint64_t)*cs->in.num_chunks)) {
 197                 ret = -EFAULT;
 198                 goto free_chunk;
 199         }
 200
 201         p->nchunks = cs->in.num_chunks;
 202         p->chunks = kvmalloc_array(p->nchunks, sizeof(struct amdgpu_cs_chunk),
 203                             GFP_KERNEL);
 204         if (!p->chunks) {
 205                 ret = -ENOMEM;
 206                 goto free_chunk;
 207         }
 208
 209         for (i = 0; i < p->nchunks; i++) {
 210                 struct drm_amdgpu_cs_chunk __user *chunk_ptr = NULL;
 211                 struct drm_amdgpu_cs_chunk user_chunk;
 212                 uint32_t __user *cdata;
 213
 214                 chunk_ptr = u64_to_user_ptr(chunk_array[i]);
 215                 if (copy_from_user(&user_chunk, chunk_ptr,
 216                                        sizeof(struct drm_amdgpu_cs_chunk))) {
 217                         ret = -EFAULT;
 218                         i--;
 219                         goto free_partial_kdata;
 220                 }
 221                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 222                 p->chunks[i].length_dw = user_chunk.length_dw;
 223
 224                 size = p->chunks[i].length_dw;
 225                 cdata = u64_to_user_ptr(user_chunk.chunk_data);
 226
 227                 p->chunks[i].kdata = kvmalloc_array(size, sizeof(uint32_t),
 228                                                     GFP_KERNEL);
 229                 if (p->chunks[i].kdata == NULL) {
 230                         ret = -ENOMEM;
 231                         i--;
 232                         goto free_partial_kdata;
 233                 }
 234                 size *= sizeof(uint32_t);
 235                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 236                         ret = -EFAULT;
 237                         goto free_partial_kdata;
 238                 }
 239
 240                 /* Assume the worst on the following checks */
 241                 ret = -EINVAL;
 242                 switch (p->chunks[i].chunk_id) {
 243                 case AMDGPU_CHUNK_ID_IB:
 244                         if (size < sizeof(struct drm_amdgpu_cs_chunk_ib))
 245                                 goto free_partial_kdata;
 246
 247                         ret = amdgpu_cs_p1_ib(p, p->chunks[i].kdata, num_ibs);
 248                         if (ret)
 249                                 goto free_partial_kdata;
 250                         break;
 251
 252                 case AMDGPU_CHUNK_ID_FENCE:
 253                         if (size < sizeof(struct drm_amdgpu_cs_chunk_fence))
 254                                 goto free_partial_kdata;
 255
 256                         ret = amdgpu_cs_p1_user_fence(p, p->chunks[i].kdata,
 257                                                       &uf_offset);
 258                         if (ret)
 259                                 goto free_partial_kdata;
 260                         break;
 261
 262                 case AMDGPU_CHUNK_ID_BO_HANDLES:
 263                         if (size < sizeof(struct drm_amdgpu_bo_list_in))
 264                                 goto free_partial_kdata;
 265
 266                         ret = amdgpu_cs_p1_bo_handles(p, p->chunks[i].kdata);
 267                         if (ret)
 268                                 goto free_partial_kdata;
 269                         break;
 270
 271                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 272                 case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
 273                 case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
 274                 case AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES:
 275                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
 276                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
 277                 case AMDGPU_CHUNK_ID_CP_GFX_SHADOW:
 278                         break;
 279
 280                 default:
 281                         goto free_partial_kdata;
 282                 }
 283         }
 284
 285         if (!p->gang_size) {
 286                 ret = -EINVAL;
 287                 goto free_all_kdata;
 288         }
 289
 290         for (i = 0; i < p->gang_size; ++i) {
 291                 ret = amdgpu_job_alloc(p->adev, vm, p->entities[i], vm,
 292                                        num_ibs[i], &p->jobs[i]);
 293                 if (ret)
 294                         goto free_all_kdata;
 295         }
 296         p->gang_leader = p->jobs[p->gang_leader_idx];
 297
 298         if (p->ctx->generation != p->gang_leader->generation) {
 299                 ret = -ECANCELED;
 300                 goto free_all_kdata;
 301         }
 302
 303         if (p->uf_bo)
 304                 p->gang_leader->uf_addr = uf_offset;
 305         kvfree(chunk_array);
 306
 307         /* Use this opportunity to fill in task info for the vm */
 308         amdgpu_vm_set_task_info(vm);
 309
 310         return 0;
 311
 312 free_all_kdata:
 313         i = p->nchunks - 1;
 314 free_partial_kdata:
 315         for (; i >= 0; i--)
 316                 kvfree(p->chunks[i].kdata);
 317         kvfree(p->chunks);
 318         p->chunks = NULL;
 319         p->nchunks = 0;
 320 free_chunk:
 321         kvfree(chunk_array);
 322
 323         return ret;
 324 }
 325
 326 static int amdgpu_cs_p2_ib(struct amdgpu_cs_parser *p,
 327                            struct amdgpu_cs_chunk *chunk,
 328                            unsigned int *ce_preempt,
 329                            unsigned int *de_preempt)
 330 {
 331         struct drm_amdgpu_cs_chunk_ib *chunk_ib = chunk->kdata;
 332         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 333         struct amdgpu_vm *vm = &fpriv->vm;
 334         struct amdgpu_ring *ring;
 335         struct amdgpu_job *job;
 336         struct amdgpu_ib *ib;
 337         int r;
 338
 339         r = amdgpu_cs_job_idx(p, chunk_ib);
 340         if (r < 0)
 341                 return r;
 342
 343         job = p->jobs[r];
 344         ring = amdgpu_job_ring(job);
 345         ib = &job->ibs[job->num_ibs++];
 346
 347         /* MM engine doesn't support user fences */
 348         if (p->uf_bo && ring->funcs->no_user_fence)
 349                 return -EINVAL;
 350
 351         if (chunk_ib->ip_type == AMDGPU_HW_IP_GFX &&
 352             chunk_ib->flags & AMDGPU_IB_FLAG_PREEMPT) {
 353                 if (chunk_ib->flags & AMDGPU_IB_FLAG_CE)
 354                         (*ce_preempt)++;
 355                 else
 356                         (*de_preempt)++;
 357
 358                 /* Each GFX command submit allows only 1 IB max
 359                  * preemptible for CE & DE */
 360                 if (*ce_preempt > 1 || *de_preempt > 1)
 361                         return -EINVAL;
 362         }
 363
 364         if (chunk_ib->flags & AMDGPU_IB_FLAG_PREAMBLE)
 365                 job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT;
 366
 367         r =  amdgpu_ib_get(p->adev, vm, ring->funcs->parse_cs ?
 368                            chunk_ib->ib_bytes : 0,
 369                            AMDGPU_IB_POOL_DELAYED, ib);
 370         if (r) {
 371                 DRM_ERROR("Failed to get ib !\n");
 372                 return r;
 373         }
 374
 375         ib->gpu_addr = chunk_ib->va_start;
 376         ib->length_dw = chunk_ib->ib_bytes / 4;
 377         ib->flags = chunk_ib->flags;
 378         return 0;
 379 }
 380
 381 static int amdgpu_cs_p2_dependencies(struct amdgpu_cs_parser *p,
 382                                      struct amdgpu_cs_chunk *chunk)
 383 {
 384         struct drm_amdgpu_cs_chunk_dep *deps = chunk->kdata;
 385         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 386         unsigned int num_deps;
 387         int i, r;
 388
 389         num_deps = chunk->length_dw * 4 /
 390                 sizeof(struct drm_amdgpu_cs_chunk_dep);
 391
 392         for (i = 0; i < num_deps; ++i) {
 393                 struct amdgpu_ctx *ctx;
 394                 struct drm_sched_entity *entity;
 395                 struct dma_fence *fence;
 396
 397                 ctx = amdgpu_ctx_get(fpriv, deps[i].ctx_id);
 398                 if (ctx == NULL)
 399                         return -EINVAL;
 400
 401                 r = amdgpu_ctx_get_entity(ctx, deps[i].ip_type,
 402                                           deps[i].ip_instance,
 403                                           deps[i].ring, &entity);
 404                 if (r) {
 405                         amdgpu_ctx_put(ctx);
 406                         return r;
 407                 }
 408
 409                 fence = amdgpu_ctx_get_fence(ctx, entity, deps[i].handle);
 410                 amdgpu_ctx_put(ctx);
 411
 412                 if (IS_ERR(fence))
 413                         return PTR_ERR(fence);
 414                 else if (!fence)
 415                         continue;
 416
 417                 if (chunk->chunk_id == AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES) {
 418                         struct drm_sched_fence *s_fence;
 419                         struct dma_fence *old = fence;
 420
 421                         s_fence = to_drm_sched_fence(fence);
 422                         fence = dma_fence_get(&s_fence->scheduled);
 423                         dma_fence_put(old);
 424                 }
 425
 426                 r = amdgpu_sync_fence(&p->sync, fence);
 427                 dma_fence_put(fence);
 428                 if (r)
 429                         return r;
 430         }
 431         return 0;
 432 }
 433
 434 static int amdgpu_syncobj_lookup_and_add(struct amdgpu_cs_parser *p,
 435                                          uint32_t handle, u64 point,
 436                                          u64 flags)
 437 {
 438         struct dma_fence *fence;
 439         int r;
 440
 441         r = drm_syncobj_find_fence(p->filp, handle, point, flags, &fence);
 442         if (r) {
 443                 DRM_ERROR("syncobj %u failed to find fence @ %llu (%d)!\n",
 444                           handle, point, r);
 445                 return r;
 446         }
 447
 448         r = amdgpu_sync_fence(&p->sync, fence);
 449         dma_fence_put(fence);
 450         return r;
 451 }
 452
 453 static int amdgpu_cs_p2_syncobj_in(struct amdgpu_cs_parser *p,
 454                                    struct amdgpu_cs_chunk *chunk)
 455 {
 456         struct drm_amdgpu_cs_chunk_sem *deps = chunk->kdata;
 457         unsigned int num_deps;
 458         int i, r;
 459
 460         num_deps = chunk->length_dw * 4 /
 461                 sizeof(struct drm_amdgpu_cs_chunk_sem);
 462         for (i = 0; i < num_deps; ++i) {
 463                 r = amdgpu_syncobj_lookup_and_add(p, deps[i].handle, 0, 0);
 464                 if (r)
 465                         return r;
 466         }
 467
 468         return 0;
 469 }
 470
 471 static int amdgpu_cs_p2_syncobj_timeline_wait(struct amdgpu_cs_parser *p,
 472                                               struct amdgpu_cs_chunk *chunk)
 473 {
 474         struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps = chunk->kdata;
 475         unsigned int num_deps;
 476         int i, r;
 477
 478         num_deps = chunk->length_dw * 4 /
 479                 sizeof(struct drm_amdgpu_cs_chunk_syncobj);
 480         for (i = 0; i < num_deps; ++i) {
 481                 r = amdgpu_syncobj_lookup_and_add(p, syncobj_deps[i].handle,
 482                                                   syncobj_deps[i].point,
 483                                                   syncobj_deps[i].flags);
 484                 if (r)
 485                         return r;
 486         }
 487
 488         return 0;
 489 }
 490
 491 static int amdgpu_cs_p2_syncobj_out(struct amdgpu_cs_parser *p,
 492                                     struct amdgpu_cs_chunk *chunk)
 493 {
 494         struct drm_amdgpu_cs_chunk_sem *deps = chunk->kdata;
 495         unsigned int num_deps;
 496         int i;
 497
 498         num_deps = chunk->length_dw * 4 /
 499                 sizeof(struct drm_amdgpu_cs_chunk_sem);
 500
 501         if (p->post_deps)
 502                 return -EINVAL;
 503
 504         p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
 505                                      GFP_KERNEL);
 506         p->num_post_deps = 0;
 507
 508         if (!p->post_deps)
 509                 return -ENOMEM;
 510
 511
 512         for (i = 0; i < num_deps; ++i) {
 513                 p->post_deps[i].syncobj =
 514                         drm_syncobj_find(p->filp, deps[i].handle);
 515                 if (!p->post_deps[i].syncobj)
 516                         return -EINVAL;
 517                 p->post_deps[i].chain = NULL;
 518                 p->post_deps[i].point = 0;
 519                 p->num_post_deps++;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static int amdgpu_cs_p2_syncobj_timeline_signal(struct amdgpu_cs_parser *p,
 526                                                 struct amdgpu_cs_chunk *chunk)
 527 {
 528         struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps = chunk->kdata;
 529         unsigned int num_deps;
 530         int i;
 531
 532         num_deps = chunk->length_dw * 4 /
 533                 sizeof(struct drm_amdgpu_cs_chunk_syncobj);
 534
 535         if (p->post_deps)
 536                 return -EINVAL;
 537
 538         p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
 539                                      GFP_KERNEL);
 540         p->num_post_deps = 0;
 541
 542         if (!p->post_deps)
 543                 return -ENOMEM;
 544
 545         for (i = 0; i < num_deps; ++i) {
 546                 struct amdgpu_cs_post_dep *dep = &p->post_deps[i];
 547
 548                 dep->chain = NULL;
 549                 if (syncobj_deps[i].point) {
 550                         dep->chain = dma_fence_chain_alloc();
 551                         if (!dep->chain)
 552                                 return -ENOMEM;
 553                 }
 554
 555                 dep->syncobj = drm_syncobj_find(p->filp,
 556                                                 syncobj_deps[i].handle);
 557                 if (!dep->syncobj) {
 558                         dma_fence_chain_free(dep->chain);
 559                         return -EINVAL;
 560                 }
 561                 dep->point = syncobj_deps[i].point;
 562                 p->num_post_deps++;
 563         }
 564
 565         return 0;
 566 }
 567
 568 static int amdgpu_cs_p2_shadow(struct amdgpu_cs_parser *p,
 569                                struct amdgpu_cs_chunk *chunk)
 570 {
 571         struct drm_amdgpu_cs_chunk_cp_gfx_shadow *shadow = chunk->kdata;
 572         int i;
 573
 574         if (shadow->flags & ~AMDGPU_CS_CHUNK_CP_GFX_SHADOW_FLAGS_INIT_SHADOW)
 575                 return -EINVAL;
 576
 577         for (i = 0; i < p->gang_size; ++i) {
 578                 p->jobs[i]->shadow_va = shadow->shadow_va;
 579                 p->jobs[i]->csa_va = shadow->csa_va;
 580                 p->jobs[i]->gds_va = shadow->gds_va;
 581                 p->jobs[i]->init_shadow =
 582                         shadow->flags & AMDGPU_CS_CHUNK_CP_GFX_SHADOW_FLAGS_INIT_SHADOW;
 583         }
 584
 585         return 0;
 586 }
 587
 588 static int amdgpu_cs_pass2(struct amdgpu_cs_parser *p)
 589 {
 590         unsigned int ce_preempt = 0, de_preempt = 0;
 591         int i, r;
 592
 593         for (i = 0; i < p->nchunks; ++i) {
 594                 struct amdgpu_cs_chunk *chunk;
 595
 596                 chunk = &p->chunks[i];
 597
 598                 switch (chunk->chunk_id) {
 599                 case AMDGPU_CHUNK_ID_IB:
 600                         r = amdgpu_cs_p2_ib(p, chunk, &ce_preempt, &de_preempt);
 601                         if (r)
 602                                 return r;
 603                         break;
 604                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 605                 case AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES:
 606                         r = amdgpu_cs_p2_dependencies(p, chunk);
 607                         if (r)
 608                                 return r;
 609                         break;
 610                 case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
 611                         r = amdgpu_cs_p2_syncobj_in(p, chunk);
 612                         if (r)
 613                                 return r;
 614                         break;
 615                 case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
 616                         r = amdgpu_cs_p2_syncobj_out(p, chunk);
 617                         if (r)
 618                                 return r;
 619                         break;
 620                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
 621                         r = amdgpu_cs_p2_syncobj_timeline_wait(p, chunk);
 622                         if (r)
 623                                 return r;
 624                         break;
 625                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
 626                         r = amdgpu_cs_p2_syncobj_timeline_signal(p, chunk);
 627                         if (r)
 628                                 return r;
 629                         break;
 630                 case AMDGPU_CHUNK_ID_CP_GFX_SHADOW:
 631                         r = amdgpu_cs_p2_shadow(p, chunk);
 632                         if (r)
 633                                 return r;
 634                         break;
 635                 }
 636         }
 637
 638         return 0;
 639 }
 640
 641 /* Convert microseconds to bytes. */
 642 static u64 us_to_bytes(struct amdgpu_device *adev, s64 us)
 643 {
 644         if (us <= 0 || !adev->mm_stats.log2_max_MBps)
 645                 return 0;
 646
 647         /* Since accum_us is incremented by a million per second, just
 648          * multiply it by the number of MB/s to get the number of bytes.
 649          */
 650         return us << adev->mm_stats.log2_max_MBps;
 651 }
 652
 653 static s64 bytes_to_us(struct amdgpu_device *adev, u64 bytes)
 654 {
 655         if (!adev->mm_stats.log2_max_MBps)
 656                 return 0;
 657
 658         return bytes >> adev->mm_stats.log2_max_MBps;
 659 }
 660
 661 /* Returns how many bytes TTM can move right now. If no bytes can be moved,
 662  * it returns 0. If it returns non-zero, it's OK to move at least one buffer,
 663  * which means it can go over the threshold once. If that happens, the driver
 664  * will be in debt and no other buffer migrations can be done until that debt
 665  * is repaid.
 666  *
 667  * This approach allows moving a buffer of any size (it's important to allow
 668  * that).
 669  *
 670  * The currency is simply time in microseconds and it increases as the clock
 671  * ticks. The accumulated microseconds (us) are converted to bytes and
 672  * returned.
 673  */
 674 static void amdgpu_cs_get_threshold_for_moves(struct amdgpu_device *adev,
 675                                               u64 *max_bytes,
 676                                               u64 *max_vis_bytes)
 677 {
 678         s64 time_us, increment_us;
 679         u64 free_vram, total_vram, used_vram;
 680         /* Allow a maximum of 200 accumulated ms. This is basically per-IB
 681          * throttling.
 682          *
 683          * It means that in order to get full max MBps, at least 5 IBs per
 684          * second must be submitted and not more than 200ms apart from each
 685          * other.
 686          */
 687         const s64 us_upper_bound = 200000;
 688
 689         if (!adev->mm_stats.log2_max_MBps) {
 690                 *max_bytes = 0;
 691                 *max_vis_bytes = 0;
 692                 return;
 693         }
 694
 695         total_vram = adev->gmc.real_vram_size - atomic64_read(&adev->vram_pin_size);
 696         used_vram = ttm_resource_manager_usage(&adev->mman.vram_mgr.manager);
 697         free_vram = used_vram >= total_vram ? 0 : total_vram - used_vram;
 698
 699         spin_lock(&adev->mm_stats.lock);
 700
 701         /* Increase the amount of accumulated us. */
 702         time_us = ktime_to_us(ktime_get());
 703         increment_us = time_us - adev->mm_stats.last_update_us;
 704         adev->mm_stats.last_update_us = time_us;
 705         adev->mm_stats.accum_us = min(adev->mm_stats.accum_us + increment_us,
 706                                       us_upper_bound);
 707
 708         /* This prevents the short period of low performance when the VRAM
 709          * usage is low and the driver is in debt or doesn't have enough
 710          * accumulated us to fill VRAM quickly.
 711          *
 712          * The situation can occur in these cases:
 713          * - a lot of VRAM is freed by userspace
 714          * - the presence of a big buffer causes a lot of evictions
 715          *   (solution: split buffers into smaller ones)
 716          *
 717          * If 128 MB or 1/8th of VRAM is free, start filling it now by setting
 718          * accum_us to a positive number.
 719          */
 720         if (free_vram >= 128 * 1024 * 1024 || free_vram >= total_vram / 8) {
 721                 s64 min_us;
 722
 723                 /* Be more aggressive on dGPUs. Try to fill a portion of free
 724                  * VRAM now.
 725                  */
 726                 if (!(adev->flags & AMD_IS_APU))
 727                         min_us = bytes_to_us(adev, free_vram / 4);
 728                 else
 729                         min_us = 0; /* Reset accum_us on APUs. */
 730
 731                 adev->mm_stats.accum_us = max(min_us, adev->mm_stats.accum_us);
 732         }
 733
 734         /* This is set to 0 if the driver is in debt to disallow (optional)
 735          * buffer moves.
 736          */
 737         *max_bytes = us_to_bytes(adev, adev->mm_stats.accum_us);
 738
 739         /* Do the same for visible VRAM if half of it is free */
 740         if (!amdgpu_gmc_vram_full_visible(&adev->gmc)) {
 741                 u64 total_vis_vram = adev->gmc.visible_vram_size;
 742                 u64 used_vis_vram =
 743                   amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr);
 744
 745                 if (used_vis_vram < total_vis_vram) {
 746                         u64 free_vis_vram = total_vis_vram - used_vis_vram;
 747
 748                         adev->mm_stats.accum_us_vis = min(adev->mm_stats.accum_us_vis +
 749                                                           increment_us, us_upper_bound);
 750
 751                         if (free_vis_vram >= total_vis_vram / 2)
 752                                 adev->mm_stats.accum_us_vis =
 753                                         max(bytes_to_us(adev, free_vis_vram / 2),
 754                                             adev->mm_stats.accum_us_vis);
 755                 }
 756
 757                 *max_vis_bytes = us_to_bytes(adev, adev->mm_stats.accum_us_vis);
 758         } else {
 759                 *max_vis_bytes = 0;
 760         }
 761
 762         spin_unlock(&adev->mm_stats.lock);
 763 }
 764
 765 /* Report how many bytes have really been moved for the last command
 766  * submission. This can result in a debt that can stop buffer migrations
 767  * temporarily.
 768  */
 769 void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
 770                                   u64 num_vis_bytes)
 771 {
 772         spin_lock(&adev->mm_stats.lock);
 773         adev->mm_stats.accum_us -= bytes_to_us(adev, num_bytes);
 774         adev->mm_stats.accum_us_vis -= bytes_to_us(adev, num_vis_bytes);
 775         spin_unlock(&adev->mm_stats.lock);
 776 }
 777
 778 static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
 779 {
 780         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 781         struct amdgpu_cs_parser *p = param;
 782         struct ttm_operation_ctx ctx = {
 783                 .interruptible = true,
 784                 .no_wait_gpu = false,
 785                 .resv = bo->tbo.base.resv
 786         };
 787         uint32_t domain;
 788         int r;
 789
 790         if (bo->tbo.pin_count)
 791                 return 0;
 792
 793         /* Don't move this buffer if we have depleted our allowance
 794          * to move it. Don't move anything if the threshold is zero.
 795          */
 796         if (p->bytes_moved < p->bytes_moved_threshold &&
 797             (!bo->tbo.base.dma_buf ||
 798             list_empty(&bo->tbo.base.dma_buf->attachments))) {
 799                 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 800                     (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)) {
 801                         /* And don't move a CPU_ACCESS_REQUIRED BO to limited
 802                          * visible VRAM if we've depleted our allowance to do
 803                          * that.
 804                          */
 805                         if (p->bytes_moved_vis < p->bytes_moved_vis_threshold)
 806                                 domain = bo->preferred_domains;
 807                         else
 808                                 domain = bo->allowed_domains;
 809                 } else {
 810                         domain = bo->preferred_domains;
 811                 }
 812         } else {
 813                 domain = bo->allowed_domains;
 814         }
 815
 816 retry:
 817         amdgpu_bo_placement_from_domain(bo, domain);
 818         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 819
 820         p->bytes_moved += ctx.bytes_moved;
 821         if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 822             amdgpu_bo_in_cpu_visible_vram(bo))
 823                 p->bytes_moved_vis += ctx.bytes_moved;
 824
 825         if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 826                 domain = bo->allowed_domains;
 827                 goto retry;
 828         }
 829
 830         return r;
 831 }
 832
 833 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 834                                 union drm_amdgpu_cs *cs)
 835 {
 836         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 837         struct ttm_operation_ctx ctx = { true, false };
 838         struct amdgpu_vm *vm = &fpriv->vm;
 839         struct amdgpu_bo_list_entry *e;
 840         struct drm_gem_object *obj;
 841         unsigned long index;
 842         unsigned int i;
 843         int r;
 844
 845         /* p->bo_list could already be assigned if AMDGPU_CHUNK_ID_BO_HANDLES is present */
 846         if (cs->in.bo_list_handle) {
 847                 if (p->bo_list)
 848                         return -EINVAL;
 849
 850                 r = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle,
 851                                        &p->bo_list);
 852                 if (r)
 853                         return r;
 854         } else if (!p->bo_list) {
 855                 /* Create a empty bo_list when no handle is provided */
 856                 r = amdgpu_bo_list_create(p->adev, p->filp, NULL, 0,
 857                                           &p->bo_list);
 858                 if (r)
 859                         return r;
 860         }
 861
 862         mutex_lock(&p->bo_list->bo_list_mutex);
 863
 864         /* Get userptr backing pages. If pages are updated after registered
 865          * in amdgpu_gem_userptr_ioctl(), amdgpu_cs_list_validate() will do
 866          * amdgpu_ttm_backend_bind() to flush and invalidate new pages
 867          */
 868         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
 869                 bool userpage_invalidated = false;
 870                 struct amdgpu_bo *bo = e->bo;
 871                 int i;
 872
 873                 e->user_pages = kvcalloc(bo->tbo.ttm->num_pages,
 874                                          sizeof(struct page *),
 875                                          GFP_KERNEL);
 876                 if (!e->user_pages) {
 877                         DRM_ERROR("kvmalloc_array failure\n");
 878                         r = -ENOMEM;
 879                         goto out_free_user_pages;
 880                 }
 881
 882                 r = amdgpu_ttm_tt_get_user_pages(bo, e->user_pages, &e->range);
 883                 if (r) {
 884                         kvfree(e->user_pages);
 885                         e->user_pages = NULL;
 886                         goto out_free_user_pages;
 887                 }
 888
 889                 for (i = 0; i < bo->tbo.ttm->num_pages; i++) {
 890                         if (bo->tbo.ttm->pages[i] != e->user_pages[i]) {
 891                                 userpage_invalidated = true;
 892                                 break;
 893                         }
 894                 }
 895                 e->user_invalidated = userpage_invalidated;
 896         }
 897
 898         drm_exec_until_all_locked(&p->exec) {
 899                 r = amdgpu_vm_lock_pd(&fpriv->vm, &p->exec, 1 + p->gang_size);
 900                 drm_exec_retry_on_contention(&p->exec);
 901                 if (unlikely(r))
 902                         goto out_free_user_pages;
 903
 904                 amdgpu_bo_list_for_each_entry(e, p->bo_list) {
 905                         /* One fence for TTM and one for each CS job */
 906                         r = drm_exec_prepare_obj(&p->exec, &e->bo->tbo.base,
 907                                                  1 + p->gang_size);
 908                         drm_exec_retry_on_contention(&p->exec);
 909                         if (unlikely(r))
 910                                 goto out_free_user_pages;
 911
 912                         e->bo_va = amdgpu_vm_bo_find(vm, e->bo);
 913                 }
 914
 915                 if (p->uf_bo) {
 916                         r = drm_exec_prepare_obj(&p->exec, &p->uf_bo->tbo.base,
 917                                                  1 + p->gang_size);
 918                         drm_exec_retry_on_contention(&p->exec);
 919                         if (unlikely(r))
 920                                 goto out_free_user_pages;
 921                 }
 922         }
 923
 924         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
 925                 struct mm_struct *usermm;
 926
 927                 usermm = amdgpu_ttm_tt_get_usermm(e->bo->tbo.ttm);
 928                 if (usermm && usermm != current->mm) {
 929                         r = -EPERM;
 930                         goto out_free_user_pages;
 931                 }
 932
 933                 if (amdgpu_ttm_tt_is_userptr(e->bo->tbo.ttm) &&
 934                     e->user_invalidated && e->user_pages) {
 935                         amdgpu_bo_placement_from_domain(e->bo,
 936                                                         AMDGPU_GEM_DOMAIN_CPU);
 937                         r = ttm_bo_validate(&e->bo->tbo, &e->bo->placement,
 938                                             &ctx);
 939                         if (r)
 940                                 goto out_free_user_pages;
 941
 942                         amdgpu_ttm_tt_set_user_pages(e->bo->tbo.ttm,
 943                                                      e->user_pages);
 944                 }
 945
 946                 kvfree(e->user_pages);
 947                 e->user_pages = NULL;
 948         }
 949
 950         amdgpu_cs_get_threshold_for_moves(p->adev, &p->bytes_moved_threshold,
 951                                           &p->bytes_moved_vis_threshold);
 952         p->bytes_moved = 0;
 953         p->bytes_moved_vis = 0;
 954
 955         r = amdgpu_vm_validate(p->adev, &fpriv->vm, NULL,
 956                                amdgpu_cs_bo_validate, p);
 957         if (r) {
 958                 DRM_ERROR("amdgpu_vm_validate() failed.\n");
 959                 goto out_free_user_pages;
 960         }
 961
 962         drm_exec_for_each_locked_object(&p->exec, index, obj) {
 963                 r = amdgpu_cs_bo_validate(p, gem_to_amdgpu_bo(obj));
 964                 if (unlikely(r))
 965                         goto out_free_user_pages;
 966         }
 967
 968         if (p->uf_bo) {
 969                 r = amdgpu_ttm_alloc_gart(&p->uf_bo->tbo);
 970                 if (unlikely(r))
 971                         goto out_free_user_pages;
 972
 973                 p->gang_leader->uf_addr += amdgpu_bo_gpu_offset(p->uf_bo);
 974         }
 975
 976         amdgpu_cs_report_moved_bytes(p->adev, p->bytes_moved,
 977                                      p->bytes_moved_vis);
 978
 979         for (i = 0; i < p->gang_size; ++i)
 980                 amdgpu_job_set_resources(p->jobs[i], p->bo_list->gds_obj,
 981                                          p->bo_list->gws_obj,
 982                                          p->bo_list->oa_obj);
 983         return 0;
 984
 985 out_free_user_pages:
 986         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
 987                 struct amdgpu_bo *bo = e->bo;
 988
 989                 if (!e->user_pages)
 990                         continue;
 991                 amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, e->range);
 992                 kvfree(e->user_pages);
 993                 e->user_pages = NULL;
 994                 e->range = NULL;
 995         }
 996         mutex_unlock(&p->bo_list->bo_list_mutex);
 997         return r;
 998 }
 999
1000 static void trace_amdgpu_cs_ibs(struct amdgpu_cs_parser *p)
1001 {
1002         int i, j;
1003
1004         if (!trace_amdgpu_cs_enabled())
1005                 return;
1006
1007         for (i = 0; i < p->gang_size; ++i) {
1008                 struct amdgpu_job *job = p->jobs[i];
1009
1010                 for (j = 0; j < job->num_ibs; ++j)
1011                         trace_amdgpu_cs(p, job, &job->ibs[j]);
1012         }
1013 }
1014
1015 static int amdgpu_cs_patch_ibs(struct amdgpu_cs_parser *p,
1016                                struct amdgpu_job *job)
1017 {
1018         struct amdgpu_ring *ring = amdgpu_job_ring(job);
1019         unsigned int i;
1020         int r;
1021
1022         /* Only for UVD/VCE VM emulation */
1023         if (!ring->funcs->parse_cs && !ring->funcs->patch_cs_in_place)
1024                 return 0;
1025
1026         for (i = 0; i < job->num_ibs; ++i) {
1027                 struct amdgpu_ib *ib = &job->ibs[i];
1028                 struct amdgpu_bo_va_mapping *m;
1029                 struct amdgpu_bo *aobj;
1030                 uint64_t va_start;
1031                 uint8_t *kptr;
1032
1033                 va_start = ib->gpu_addr & AMDGPU_GMC_HOLE_MASK;
1034                 r = amdgpu_cs_find_mapping(p, va_start, &aobj, &m);
1035                 if (r) {
1036                         DRM_ERROR("IB va_start is invalid\n");
1037                         return r;
1038                 }
1039
1040                 if ((va_start + ib->length_dw * 4) >
1041                     (m->last + 1) * AMDGPU_GPU_PAGE_SIZE) {
1042                         DRM_ERROR("IB va_start+ib_bytes is invalid\n");
1043                         return -EINVAL;
1044                 }
1045
1046                 /* the IB should be reserved at this point */
1047                 r = amdgpu_bo_kmap(aobj, (void **)&kptr);
1048                 if (r)
1049                         return r;
1050
1051                 kptr += va_start - (m->start * AMDGPU_GPU_PAGE_SIZE);
1052
1053                 if (ring->funcs->parse_cs) {
1054                         memcpy(ib->ptr, kptr, ib->length_dw * 4);
1055                         amdgpu_bo_kunmap(aobj);
1056
1057                         r = amdgpu_ring_parse_cs(ring, p, job, ib);
1058                         if (r)
1059                                 return r;
1060                 } else {
1061                         ib->ptr = (uint32_t *)kptr;
1062                         r = amdgpu_ring_patch_cs_in_place(ring, p, job, ib);
1063                         amdgpu_bo_kunmap(aobj);
1064                         if (r)
1065                                 return r;
1066                 }
1067         }
1068
1069         return 0;
1070 }
1071
1072 static int amdgpu_cs_patch_jobs(struct amdgpu_cs_parser *p)
1073 {
1074         unsigned int i;
1075         int r;
1076
1077         for (i = 0; i < p->gang_size; ++i) {
1078                 r = amdgpu_cs_patch_ibs(p, p->jobs[i]);
1079                 if (r)
1080                         return r;
1081         }
1082         return 0;
1083 }
1084
1085 static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
1086 {
1087         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1088         struct amdgpu_job *job = p->gang_leader;
1089         struct amdgpu_device *adev = p->adev;
1090         struct amdgpu_vm *vm = &fpriv->vm;
1091         struct amdgpu_bo_list_entry *e;
1092         struct amdgpu_bo_va *bo_va;
1093         unsigned int i;
1094         int r;
1095
1096         r = amdgpu_vm_clear_freed(adev, vm, NULL);
1097         if (r)
1098                 return r;
1099
1100         r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false);
1101         if (r)
1102                 return r;
1103
1104         r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update);
1105         if (r)
1106                 return r;
1107
1108         if (fpriv->csa_va) {
1109                 bo_va = fpriv->csa_va;
1110                 BUG_ON(!bo_va);
1111                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1112                 if (r)
1113                         return r;
1114
1115                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1116                 if (r)
1117                         return r;
1118         }
1119
1120         /* FIXME: In theory this loop shouldn't be needed any more when
1121          * amdgpu_vm_handle_moved handles all moved BOs that are reserved
1122          * with p->ticket. But removing it caused test regressions, so I'm
1123          * leaving it here for now.
1124          */
1125         amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1126                 bo_va = e->bo_va;
1127                 if (bo_va == NULL)
1128                         continue;
1129
1130                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1131                 if (r)
1132                         return r;
1133
1134                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1135                 if (r)
1136                         return r;
1137         }
1138
1139         r = amdgpu_vm_handle_moved(adev, vm, &p->exec.ticket);
1140         if (r)
1141                 return r;
1142
1143         r = amdgpu_vm_update_pdes(adev, vm, false);
1144         if (r)
1145                 return r;
1146
1147         r = amdgpu_sync_fence(&p->sync, vm->last_update);
1148         if (r)
1149                 return r;
1150
1151         for (i = 0; i < p->gang_size; ++i) {
1152                 job = p->jobs[i];
1153
1154                 if (!job->vm)
1155                         continue;
1156
1157                 job->vm_pd_addr = amdgpu_gmc_pd_addr(vm->root.bo);
1158         }
1159
1160         if (adev->debug_vm) {
1161                 /* Invalidate all BOs to test for userspace bugs */
1162                 amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1163                         struct amdgpu_bo *bo = e->bo;
1164
1165                         /* ignore duplicates */
1166                         if (!bo)
1167                                 continue;
1168
1169                         amdgpu_vm_bo_invalidate(adev, bo, false);
1170                 }
1171         }
1172
1173         return 0;
1174 }
1175
1176 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
1177 {
1178         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1179         struct drm_gpu_scheduler *sched;
1180         struct drm_gem_object *obj;
1181         struct dma_fence *fence;
1182         unsigned long index;
1183         unsigned int i;
1184         int r;
1185
1186         r = amdgpu_ctx_wait_prev_fence(p->ctx, p->entities[p->gang_leader_idx]);
1187         if (r) {
1188                 if (r != -ERESTARTSYS)
1189                         DRM_ERROR("amdgpu_ctx_wait_prev_fence failed.\n");
1190                 return r;
1191         }
1192
1193         drm_exec_for_each_locked_object(&p->exec, index, obj) {
1194                 struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
1195
1196                 struct dma_resv *resv = bo->tbo.base.resv;
1197                 enum amdgpu_sync_mode sync_mode;
1198
1199                 sync_mode = amdgpu_bo_explicit_sync(bo) ?
1200                         AMDGPU_SYNC_EXPLICIT : AMDGPU_SYNC_NE_OWNER;
1201                 r = amdgpu_sync_resv(p->adev, &p->sync, resv, sync_mode,
1202                                      &fpriv->vm);
1203                 if (r)
1204                         return r;
1205         }
1206
1207         for (i = 0; i < p->gang_size; ++i) {
1208                 r = amdgpu_sync_push_to_job(&p->sync, p->jobs[i]);
1209                 if (r)
1210                         return r;
1211         }
1212
1213         sched = p->gang_leader->base.entity->rq->sched;
1214         while ((fence = amdgpu_sync_get_fence(&p->sync))) {
1215                 struct drm_sched_fence *s_fence = to_drm_sched_fence(fence);
1216
1217                 /*
1218                  * When we have an dependency it might be necessary to insert a
1219                  * pipeline sync to make sure that all caches etc are flushed and the
1220                  * next job actually sees the results from the previous one
1221                  * before we start executing on the same scheduler ring.
1222                  */
1223                 if (!s_fence || s_fence->sched != sched) {
1224                         dma_fence_put(fence);
1225                         continue;
1226                 }
1227
1228                 r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence);
1229                 dma_fence_put(fence);
1230                 if (r)
1231                         return r;
1232         }
1233         return 0;
1234 }
1235
1236 static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
1237 {
1238         int i;
1239
1240         for (i = 0; i < p->num_post_deps; ++i) {
1241                 if (p->post_deps[i].chain && p->post_deps[i].point) {
1242                         drm_syncobj_add_point(p->post_deps[i].syncobj,
1243                                               p->post_deps[i].chain,
1244                                               p->fence, p->post_deps[i].point);
1245                         p->post_deps[i].chain = NULL;
1246                 } else {
1247                         drm_syncobj_replace_fence(p->post_deps[i].syncobj,
1248                                                   p->fence);
1249                 }
1250         }
1251 }
1252
1253 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
1254                             union drm_amdgpu_cs *cs)
1255 {
1256         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1257         struct amdgpu_job *leader = p->gang_leader;
1258         struct amdgpu_bo_list_entry *e;
1259         struct drm_gem_object *gobj;
1260         unsigned long index;
1261         unsigned int i;
1262         uint64_t seq;
1263         int r;
1264
1265         for (i = 0; i < p->gang_size; ++i)
1266                 drm_sched_job_arm(&p->jobs[i]->base);
1267
1268         for (i = 0; i < p->gang_size; ++i) {
1269                 struct dma_fence *fence;
1270
1271                 if (p->jobs[i] == leader)
1272                         continue;
1273
1274                 fence = &p->jobs[i]->base.s_fence->scheduled;
1275                 dma_fence_get(fence);
1276                 r = drm_sched_job_add_dependency(&leader->base, fence);
1277                 if (r) {
1278                         dma_fence_put(fence);
1279                         return r;
1280                 }
1281         }
1282
1283         if (p->gang_size > 1) {
1284                 for (i = 0; i < p->gang_size; ++i)
1285                         amdgpu_job_set_gang_leader(p->jobs[i], leader);
1286         }
1287
1288         /* No memory allocation is allowed while holding the notifier lock.
1289          * The lock is held until amdgpu_cs_submit is finished and fence is
1290          * added to BOs.
1291          */
1292         mutex_lock(&p->adev->notifier_lock);
1293
1294         /* If userptr are invalidated after amdgpu_cs_parser_bos(), return
1295          * -EAGAIN, drmIoctl in libdrm will restart the amdgpu_cs_ioctl.
1296          */
1297         r = 0;
1298         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
1299                 r |= !amdgpu_ttm_tt_get_user_pages_done(e->bo->tbo.ttm,
1300                                                         e->range);
1301                 e->range = NULL;
1302         }
1303         if (r) {
1304                 r = -EAGAIN;
1305                 mutex_unlock(&p->adev->notifier_lock);
1306                 return r;
1307         }
1308
1309         p->fence = dma_fence_get(&leader->base.s_fence->finished);
1310         drm_exec_for_each_locked_object(&p->exec, index, gobj) {
1311
1312                 ttm_bo_move_to_lru_tail_unlocked(&gem_to_amdgpu_bo(gobj)->tbo);
1313
1314                 /* Everybody except for the gang leader uses READ */
1315                 for (i = 0; i < p->gang_size; ++i) {
1316                         if (p->jobs[i] == leader)
1317                                 continue;
1318
1319                         dma_resv_add_fence(gobj->resv,
1320                                            &p->jobs[i]->base.s_fence->finished,
1321                                            DMA_RESV_USAGE_READ);
1322                 }
1323
1324                 /* The gang leader as remembered as writer */
1325                 dma_resv_add_fence(gobj->resv, p->fence, DMA_RESV_USAGE_WRITE);
1326         }
1327
1328         seq = amdgpu_ctx_add_fence(p->ctx, p->entities[p->gang_leader_idx],
1329                                    p->fence);
1330         amdgpu_cs_post_dependencies(p);
1331
1332         if ((leader->preamble_status & AMDGPU_PREAMBLE_IB_PRESENT) &&
1333             !p->ctx->preamble_presented) {
1334                 leader->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT_FIRST;
1335                 p->ctx->preamble_presented = true;
1336         }
1337
1338         cs->out.handle = seq;
1339         leader->uf_sequence = seq;
1340
1341         amdgpu_vm_bo_trace_cs(&fpriv->vm, &p->exec.ticket);
1342         for (i = 0; i < p->gang_size; ++i) {
1343                 amdgpu_job_free_resources(p->jobs[i]);
1344                 trace_amdgpu_cs_ioctl(p->jobs[i]);
1345                 drm_sched_entity_push_job(&p->jobs[i]->base);
1346                 p->jobs[i] = NULL;
1347         }
1348
1349         amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm);
1350
1351         mutex_unlock(&p->adev->notifier_lock);
1352         mutex_unlock(&p->bo_list->bo_list_mutex);
1353         return 0;
1354 }
1355
1356 /* Cleanup the parser structure */
1357 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser)
1358 {
1359         unsigned int i;
1360
1361         amdgpu_sync_free(&parser->sync);
1362         drm_exec_fini(&parser->exec);
1363
1364         for (i = 0; i < parser->num_post_deps; i++) {
1365                 drm_syncobj_put(parser->post_deps[i].syncobj);
1366                 kfree(parser->post_deps[i].chain);
1367         }
1368         kfree(parser->post_deps);
1369
1370         dma_fence_put(parser->fence);
1371
1372         if (parser->ctx)
1373                 amdgpu_ctx_put(parser->ctx);
1374         if (parser->bo_list)
1375                 amdgpu_bo_list_put(parser->bo_list);
1376
1377         for (i = 0; i < parser->nchunks; i++)
1378                 kvfree(parser->chunks[i].kdata);
1379         kvfree(parser->chunks);
1380         for (i = 0; i < parser->gang_size; ++i) {
1381                 if (parser->jobs[i])
1382                         amdgpu_job_free(parser->jobs[i]);
1383         }
1384         amdgpu_bo_unref(&parser->uf_bo);
1385 }
1386
1387 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
1388 {
1389         struct amdgpu_device *adev = drm_to_adev(dev);
1390         struct amdgpu_cs_parser parser;
1391         int r;
1392
1393         if (amdgpu_ras_intr_triggered())
1394                 return -EHWPOISON;
1395
1396         if (!adev->accel_working)
1397                 return -EBUSY;
1398
1399         r = amdgpu_cs_parser_init(&parser, adev, filp, data);
1400         if (r) {
1401                 DRM_ERROR_RATELIMITED("Failed to initialize parser %d!\n", r);
1402                 return r;
1403         }
1404
1405         r = amdgpu_cs_pass1(&parser, data);
1406         if (r)
1407                 goto error_fini;
1408
1409         r = amdgpu_cs_pass2(&parser);
1410         if (r)
1411                 goto error_fini;
1412
1413         r = amdgpu_cs_parser_bos(&parser, data);
1414         if (r) {
1415                 if (r == -ENOMEM)
1416                         DRM_ERROR("Not enough memory for command submission!\n");
1417                 else if (r != -ERESTARTSYS && r != -EAGAIN)
1418                         DRM_DEBUG("Failed to process the buffer list %d!\n", r);
1419                 goto error_fini;
1420         }
1421
1422         r = amdgpu_cs_patch_jobs(&parser);
1423         if (r)
1424                 goto error_backoff;
1425
1426         r = amdgpu_cs_vm_handling(&parser);
1427         if (r)
1428                 goto error_backoff;
1429
1430         r = amdgpu_cs_sync_rings(&parser);
1431         if (r)
1432                 goto error_backoff;
1433
1434         trace_amdgpu_cs_ibs(&parser);
1435
1436         r = amdgpu_cs_submit(&parser, data);
1437         if (r)
1438                 goto error_backoff;
1439
1440         amdgpu_cs_parser_fini(&parser);
1441         return 0;
1442
1443 error_backoff:
1444         mutex_unlock(&parser.bo_list->bo_list_mutex);
1445
1446 error_fini:
1447         amdgpu_cs_parser_fini(&parser);
1448         return r;
1449 }
1450
1451 /**
1452  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
1453  *
1454  * @dev: drm device
1455  * @data: data from userspace
1456  * @filp: file private
1457  *
1458  * Wait for the command submission identified by handle to finish.
1459  */
1460 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
1461                          struct drm_file *filp)
1462 {
1463         union drm_amdgpu_wait_cs *wait = data;
1464         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
1465         struct drm_sched_entity *entity;
1466         struct amdgpu_ctx *ctx;
1467         struct dma_fence *fence;
1468         long r;
1469
1470         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
1471         if (ctx == NULL)
1472                 return -EINVAL;
1473
1474         r = amdgpu_ctx_get_entity(ctx, wait->in.ip_type, wait->in.ip_instance,
1475                                   wait->in.ring, &entity);
1476         if (r) {
1477                 amdgpu_ctx_put(ctx);
1478                 return r;
1479         }
1480
1481         fence = amdgpu_ctx_get_fence(ctx, entity, wait->in.handle);
1482         if (IS_ERR(fence))
1483                 r = PTR_ERR(fence);
1484         else if (fence) {
1485                 r = dma_fence_wait_timeout(fence, true, timeout);
1486                 if (r > 0 && fence->error)
1487                         r = fence->error;
1488                 dma_fence_put(fence);
1489         } else
1490                 r = 1;
1491
1492         amdgpu_ctx_put(ctx);
1493         if (r < 0)
1494                 return r;
1495
1496         memset(wait, 0, sizeof(*wait));
1497         wait->out.status = (r == 0);
1498
1499         return 0;
1500 }
1501
1502 /**
1503  * amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
1504  *
1505  * @adev: amdgpu device
1506  * @filp: file private
1507  * @user: drm_amdgpu_fence copied from user space
1508  */
1509 static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
1510                                              struct drm_file *filp,
1511                                              struct drm_amdgpu_fence *user)
1512 {
1513         struct drm_sched_entity *entity;
1514         struct amdgpu_ctx *ctx;
1515         struct dma_fence *fence;
1516         int r;
1517
1518         ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
1519         if (ctx == NULL)
1520                 return ERR_PTR(-EINVAL);
1521
1522         r = amdgpu_ctx_get_entity(ctx, user->ip_type, user->ip_instance,
1523                                   user->ring, &entity);
1524         if (r) {
1525                 amdgpu_ctx_put(ctx);
1526                 return ERR_PTR(r);
1527         }
1528
1529         fence = amdgpu_ctx_get_fence(ctx, entity, user->seq_no);
1530         amdgpu_ctx_put(ctx);
1531
1532         return fence;
1533 }
1534
1535 int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
1536                                     struct drm_file *filp)
1537 {
1538         struct amdgpu_device *adev = drm_to_adev(dev);
1539         union drm_amdgpu_fence_to_handle *info = data;
1540         struct dma_fence *fence;
1541         struct drm_syncobj *syncobj;
1542         struct sync_file *sync_file;
1543         int fd, r;
1544
1545         fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
1546         if (IS_ERR(fence))
1547                 return PTR_ERR(fence);
1548
1549         if (!fence)
1550                 fence = dma_fence_get_stub();
1551
1552         switch (info->in.what) {
1553         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
1554                 r = drm_syncobj_create(&syncobj, 0, fence);
1555                 dma_fence_put(fence);
1556                 if (r)
1557                         return r;
1558                 r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
1559                 drm_syncobj_put(syncobj);
1560                 return r;
1561
1562         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
1563                 r = drm_syncobj_create(&syncobj, 0, fence);
1564                 dma_fence_put(fence);
1565                 if (r)
1566                         return r;
1567                 r = drm_syncobj_get_fd(syncobj, (int *)&info->out.handle);
1568                 drm_syncobj_put(syncobj);
1569                 return r;
1570
1571         case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
1572                 fd = get_unused_fd_flags(O_CLOEXEC);
1573                 if (fd < 0) {
1574                         dma_fence_put(fence);
1575                         return fd;
1576                 }
1577
1578                 sync_file = sync_file_create(fence);
1579                 dma_fence_put(fence);
1580                 if (!sync_file) {
1581                         put_unused_fd(fd);
1582                         return -ENOMEM;
1583                 }
1584
1585                 fd_install(fd, sync_file->file);
1586                 info->out.handle = fd;
1587                 return 0;
1588
1589         default:
1590                 dma_fence_put(fence);
1591                 return -EINVAL;
1592         }
1593 }
1594
1595 /**
1596  * amdgpu_cs_wait_all_fences - wait on all fences to signal
1597  *
1598  * @adev: amdgpu device
1599  * @filp: file private
1600  * @wait: wait parameters
1601  * @fences: array of drm_amdgpu_fence
1602  */
1603 static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
1604                                      struct drm_file *filp,
1605                                      union drm_amdgpu_wait_fences *wait,
1606                                      struct drm_amdgpu_fence *fences)
1607 {
1608         uint32_t fence_count = wait->in.fence_count;
1609         unsigned int i;
1610         long r = 1;
1611
1612         for (i = 0; i < fence_count; i++) {
1613                 struct dma_fence *fence;
1614                 unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1615
1616                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1617                 if (IS_ERR(fence))
1618                         return PTR_ERR(fence);
1619                 else if (!fence)
1620                         continue;
1621
1622                 r = dma_fence_wait_timeout(fence, true, timeout);
1623                 if (r > 0 && fence->error)
1624                         r = fence->error;
1625
1626                 dma_fence_put(fence);
1627                 if (r < 0)
1628                         return r;
1629
1630                 if (r == 0)
1631                         break;
1632         }
1633
1634         memset(wait, 0, sizeof(*wait));
1635         wait->out.status = (r > 0);
1636
1637         return 0;
1638 }
1639
1640 /**
1641  * amdgpu_cs_wait_any_fence - wait on any fence to signal
1642  *
1643  * @adev: amdgpu device
1644  * @filp: file private
1645  * @wait: wait parameters
1646  * @fences: array of drm_amdgpu_fence
1647  */
1648 static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
1649                                     struct drm_file *filp,
1650                                     union drm_amdgpu_wait_fences *wait,
1651                                     struct drm_amdgpu_fence *fences)
1652 {
1653         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1654         uint32_t fence_count = wait->in.fence_count;
1655         uint32_t first = ~0;
1656         struct dma_fence **array;
1657         unsigned int i;
1658         long r;
1659
1660         /* Prepare the fence array */
1661         array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
1662
1663         if (array == NULL)
1664                 return -ENOMEM;
1665
1666         for (i = 0; i < fence_count; i++) {
1667                 struct dma_fence *fence;
1668
1669                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1670                 if (IS_ERR(fence)) {
1671                         r = PTR_ERR(fence);
1672                         goto err_free_fence_array;
1673                 } else if (fence) {
1674                         array[i] = fence;
1675                 } else { /* NULL, the fence has been already signaled */
1676                         r = 1;
1677                         first = i;
1678                         goto out;
1679                 }
1680         }
1681
1682         r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
1683                                        &first);
1684         if (r < 0)
1685                 goto err_free_fence_array;
1686
1687 out:
1688         memset(wait, 0, sizeof(*wait));
1689         wait->out.status = (r > 0);
1690         wait->out.first_signaled = first;
1691
1692         if (first < fence_count && array[first])
1693                 r = array[first]->error;
1694         else
1695                 r = 0;
1696
1697 err_free_fence_array:
1698         for (i = 0; i < fence_count; i++)
1699                 dma_fence_put(array[i]);
1700         kfree(array);
1701
1702         return r;
1703 }
1704
1705 /**
1706  * amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
1707  *
1708  * @dev: drm device
1709  * @data: data from userspace
1710  * @filp: file private
1711  */
1712 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
1713                                 struct drm_file *filp)
1714 {
1715         struct amdgpu_device *adev = drm_to_adev(dev);
1716         union drm_amdgpu_wait_fences *wait = data;
1717         uint32_t fence_count = wait->in.fence_count;
1718         struct drm_amdgpu_fence *fences_user;
1719         struct drm_amdgpu_fence *fences;
1720         int r;
1721
1722         /* Get the fences from userspace */
1723         fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
1724                         GFP_KERNEL);
1725         if (fences == NULL)
1726                 return -ENOMEM;
1727
1728         fences_user = u64_to_user_ptr(wait->in.fences);
1729         if (copy_from_user(fences, fences_user,
1730                 sizeof(struct drm_amdgpu_fence) * fence_count)) {
1731                 r = -EFAULT;
1732                 goto err_free_fences;
1733         }
1734
1735         if (wait->in.wait_all)
1736                 r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
1737         else
1738                 r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
1739
1740 err_free_fences:
1741         kfree(fences);
1742
1743         return r;
1744 }
1745
1746 /**
1747  * amdgpu_cs_find_mapping - find bo_va for VM address
1748  *
1749  * @parser: command submission parser context
1750  * @addr: VM address
1751  * @bo: resulting BO of the mapping found
1752  * @map: Placeholder to return found BO mapping
1753  *
1754  * Search the buffer objects in the command submission context for a certain
1755  * virtual memory address. Returns allocation structure when found, NULL
1756  * otherwise.
1757  */
1758 int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1759                            uint64_t addr, struct amdgpu_bo **bo,
1760                            struct amdgpu_bo_va_mapping **map)
1761 {
1762         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
1763         struct ttm_operation_ctx ctx = { false, false };
1764         struct amdgpu_vm *vm = &fpriv->vm;
1765         struct amdgpu_bo_va_mapping *mapping;
1766         int r;
1767
1768         addr /= AMDGPU_GPU_PAGE_SIZE;
1769
1770         mapping = amdgpu_vm_bo_lookup_mapping(vm, addr);
1771         if (!mapping || !mapping->bo_va || !mapping->bo_va->base.bo)
1772                 return -EINVAL;
1773
1774         *bo = mapping->bo_va->base.bo;
1775         *map = mapping;
1776
1777         /* Double check that the BO is reserved by this CS */
1778         if (dma_resv_locking_ctx((*bo)->tbo.base.resv) != &parser->exec.ticket)
1779                 return -EINVAL;
1780
1781         if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
1782                 (*bo)->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1783                 amdgpu_bo_placement_from_domain(*bo, (*bo)->allowed_domains);
1784                 r = ttm_bo_validate(&(*bo)->tbo, &(*bo)->placement, &ctx);
1785                 if (r)
1786                         return r;
1787         }
1788
1789         return amdgpu_ttm_alloc_gart(&(*bo)->tbo);
1790 }