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 <[email protected]>
  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_res_cpu_visible(adev, bo->tbo.resource))
 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         /*
1097          * We can't use gang submit on with reserved VMIDs when the VM changes
1098          * can't be invalidated by more than one engine at the same time.
1099          */
1100         if (p->gang_size > 1 && !p->adev->vm_manager.concurrent_flush) {
1101                 for (i = 0; i < p->gang_size; ++i) {
1102                         struct drm_sched_entity *entity = p->entities[i];
1103                         struct drm_gpu_scheduler *sched = entity->rq->sched;
1104                         struct amdgpu_ring *ring = to_amdgpu_ring(sched);
1105
1106                         if (amdgpu_vmid_uses_reserved(vm, ring->vm_hub))
1107                                 return -EINVAL;
1108                 }
1109         }
1110
1111         r = amdgpu_vm_clear_freed(adev, vm, NULL);
1112         if (r)
1113                 return r;
1114
1115         r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false);
1116         if (r)
1117                 return r;
1118
1119         r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update);
1120         if (r)
1121                 return r;
1122
1123         if (fpriv->csa_va) {
1124                 bo_va = fpriv->csa_va;
1125                 BUG_ON(!bo_va);
1126                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1127                 if (r)
1128                         return r;
1129
1130                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1131                 if (r)
1132                         return r;
1133         }
1134
1135         /* FIXME: In theory this loop shouldn't be needed any more when
1136          * amdgpu_vm_handle_moved handles all moved BOs that are reserved
1137          * with p->ticket. But removing it caused test regressions, so I'm
1138          * leaving it here for now.
1139          */
1140         amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1141                 bo_va = e->bo_va;
1142                 if (bo_va == NULL)
1143                         continue;
1144
1145                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1146                 if (r)
1147                         return r;
1148
1149                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1150                 if (r)
1151                         return r;
1152         }
1153
1154         r = amdgpu_vm_handle_moved(adev, vm, &p->exec.ticket);
1155         if (r)
1156                 return r;
1157
1158         r = amdgpu_vm_update_pdes(adev, vm, false);
1159         if (r)
1160                 return r;
1161
1162         r = amdgpu_sync_fence(&p->sync, vm->last_update);
1163         if (r)
1164                 return r;
1165
1166         for (i = 0; i < p->gang_size; ++i) {
1167                 job = p->jobs[i];
1168
1169                 if (!job->vm)
1170                         continue;
1171
1172                 job->vm_pd_addr = amdgpu_gmc_pd_addr(vm->root.bo);
1173         }
1174
1175         if (adev->debug_vm) {
1176                 /* Invalidate all BOs to test for userspace bugs */
1177                 amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1178                         struct amdgpu_bo *bo = e->bo;
1179
1180                         /* ignore duplicates */
1181                         if (!bo)
1182                                 continue;
1183
1184                         amdgpu_vm_bo_invalidate(adev, bo, false);
1185                 }
1186         }
1187
1188         return 0;
1189 }
1190
1191 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
1192 {
1193         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1194         struct drm_gpu_scheduler *sched;
1195         struct drm_gem_object *obj;
1196         struct dma_fence *fence;
1197         unsigned long index;
1198         unsigned int i;
1199         int r;
1200
1201         r = amdgpu_ctx_wait_prev_fence(p->ctx, p->entities[p->gang_leader_idx]);
1202         if (r) {
1203                 if (r != -ERESTARTSYS)
1204                         DRM_ERROR("amdgpu_ctx_wait_prev_fence failed.\n");
1205                 return r;
1206         }
1207
1208         drm_exec_for_each_locked_object(&p->exec, index, obj) {
1209                 struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
1210
1211                 struct dma_resv *resv = bo->tbo.base.resv;
1212                 enum amdgpu_sync_mode sync_mode;
1213
1214                 sync_mode = amdgpu_bo_explicit_sync(bo) ?
1215                         AMDGPU_SYNC_EXPLICIT : AMDGPU_SYNC_NE_OWNER;
1216                 r = amdgpu_sync_resv(p->adev, &p->sync, resv, sync_mode,
1217                                      &fpriv->vm);
1218                 if (r)
1219                         return r;
1220         }
1221
1222         for (i = 0; i < p->gang_size; ++i) {
1223                 r = amdgpu_sync_push_to_job(&p->sync, p->jobs[i]);
1224                 if (r)
1225                         return r;
1226         }
1227
1228         sched = p->gang_leader->base.entity->rq->sched;
1229         while ((fence = amdgpu_sync_get_fence(&p->sync))) {
1230                 struct drm_sched_fence *s_fence = to_drm_sched_fence(fence);
1231
1232                 /*
1233                  * When we have an dependency it might be necessary to insert a
1234                  * pipeline sync to make sure that all caches etc are flushed and the
1235                  * next job actually sees the results from the previous one
1236                  * before we start executing on the same scheduler ring.
1237                  */
1238                 if (!s_fence || s_fence->sched != sched) {
1239                         dma_fence_put(fence);
1240                         continue;
1241                 }
1242
1243                 r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence);
1244                 dma_fence_put(fence);
1245                 if (r)
1246                         return r;
1247         }
1248         return 0;
1249 }
1250
1251 static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
1252 {
1253         int i;
1254
1255         for (i = 0; i < p->num_post_deps; ++i) {
1256                 if (p->post_deps[i].chain && p->post_deps[i].point) {
1257                         drm_syncobj_add_point(p->post_deps[i].syncobj,
1258                                               p->post_deps[i].chain,
1259                                               p->fence, p->post_deps[i].point);
1260                         p->post_deps[i].chain = NULL;
1261                 } else {
1262                         drm_syncobj_replace_fence(p->post_deps[i].syncobj,
1263                                                   p->fence);
1264                 }
1265         }
1266 }
1267
1268 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
1269                             union drm_amdgpu_cs *cs)
1270 {
1271         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1272         struct amdgpu_job *leader = p->gang_leader;
1273         struct amdgpu_bo_list_entry *e;
1274         struct drm_gem_object *gobj;
1275         unsigned long index;
1276         unsigned int i;
1277         uint64_t seq;
1278         int r;
1279
1280         for (i = 0; i < p->gang_size; ++i)
1281                 drm_sched_job_arm(&p->jobs[i]->base);
1282
1283         for (i = 0; i < p->gang_size; ++i) {
1284                 struct dma_fence *fence;
1285
1286                 if (p->jobs[i] == leader)
1287                         continue;
1288
1289                 fence = &p->jobs[i]->base.s_fence->scheduled;
1290                 dma_fence_get(fence);
1291                 r = drm_sched_job_add_dependency(&leader->base, fence);
1292                 if (r) {
1293                         dma_fence_put(fence);
1294                         return r;
1295                 }
1296         }
1297
1298         if (p->gang_size > 1) {
1299                 for (i = 0; i < p->gang_size; ++i)
1300                         amdgpu_job_set_gang_leader(p->jobs[i], leader);
1301         }
1302
1303         /* No memory allocation is allowed while holding the notifier lock.
1304          * The lock is held until amdgpu_cs_submit is finished and fence is
1305          * added to BOs.
1306          */
1307         mutex_lock(&p->adev->notifier_lock);
1308
1309         /* If userptr are invalidated after amdgpu_cs_parser_bos(), return
1310          * -EAGAIN, drmIoctl in libdrm will restart the amdgpu_cs_ioctl.
1311          */
1312         r = 0;
1313         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
1314                 r |= !amdgpu_ttm_tt_get_user_pages_done(e->bo->tbo.ttm,
1315                                                         e->range);
1316                 e->range = NULL;
1317         }
1318         if (r) {
1319                 r = -EAGAIN;
1320                 mutex_unlock(&p->adev->notifier_lock);
1321                 return r;
1322         }
1323
1324         p->fence = dma_fence_get(&leader->base.s_fence->finished);
1325         drm_exec_for_each_locked_object(&p->exec, index, gobj) {
1326
1327                 ttm_bo_move_to_lru_tail_unlocked(&gem_to_amdgpu_bo(gobj)->tbo);
1328
1329                 /* Everybody except for the gang leader uses READ */
1330                 for (i = 0; i < p->gang_size; ++i) {
1331                         if (p->jobs[i] == leader)
1332                                 continue;
1333
1334                         dma_resv_add_fence(gobj->resv,
1335                                            &p->jobs[i]->base.s_fence->finished,
1336                                            DMA_RESV_USAGE_READ);
1337                 }
1338
1339                 /* The gang leader as remembered as writer */
1340                 dma_resv_add_fence(gobj->resv, p->fence, DMA_RESV_USAGE_WRITE);
1341         }
1342
1343         seq = amdgpu_ctx_add_fence(p->ctx, p->entities[p->gang_leader_idx],
1344                                    p->fence);
1345         amdgpu_cs_post_dependencies(p);
1346
1347         if ((leader->preamble_status & AMDGPU_PREAMBLE_IB_PRESENT) &&
1348             !p->ctx->preamble_presented) {
1349                 leader->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT_FIRST;
1350                 p->ctx->preamble_presented = true;
1351         }
1352
1353         cs->out.handle = seq;
1354         leader->uf_sequence = seq;
1355
1356         amdgpu_vm_bo_trace_cs(&fpriv->vm, &p->exec.ticket);
1357         for (i = 0; i < p->gang_size; ++i) {
1358                 amdgpu_job_free_resources(p->jobs[i]);
1359                 trace_amdgpu_cs_ioctl(p->jobs[i]);
1360                 drm_sched_entity_push_job(&p->jobs[i]->base);
1361                 p->jobs[i] = NULL;
1362         }
1363
1364         amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm);
1365
1366         mutex_unlock(&p->adev->notifier_lock);
1367         mutex_unlock(&p->bo_list->bo_list_mutex);
1368         return 0;
1369 }
1370
1371 /* Cleanup the parser structure */
1372 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser)
1373 {
1374         unsigned int i;
1375
1376         amdgpu_sync_free(&parser->sync);
1377         drm_exec_fini(&parser->exec);
1378
1379         for (i = 0; i < parser->num_post_deps; i++) {
1380                 drm_syncobj_put(parser->post_deps[i].syncobj);
1381                 kfree(parser->post_deps[i].chain);
1382         }
1383         kfree(parser->post_deps);
1384
1385         dma_fence_put(parser->fence);
1386
1387         if (parser->ctx)
1388                 amdgpu_ctx_put(parser->ctx);
1389         if (parser->bo_list)
1390                 amdgpu_bo_list_put(parser->bo_list);
1391
1392         for (i = 0; i < parser->nchunks; i++)
1393                 kvfree(parser->chunks[i].kdata);
1394         kvfree(parser->chunks);
1395         for (i = 0; i < parser->gang_size; ++i) {
1396                 if (parser->jobs[i])
1397                         amdgpu_job_free(parser->jobs[i]);
1398         }
1399         amdgpu_bo_unref(&parser->uf_bo);
1400 }
1401
1402 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
1403 {
1404         struct amdgpu_device *adev = drm_to_adev(dev);
1405         struct amdgpu_cs_parser parser;
1406         int r;
1407
1408         if (amdgpu_ras_intr_triggered())
1409                 return -EHWPOISON;
1410
1411         if (!adev->accel_working)
1412                 return -EBUSY;
1413
1414         r = amdgpu_cs_parser_init(&parser, adev, filp, data);
1415         if (r) {
1416                 DRM_ERROR_RATELIMITED("Failed to initialize parser %d!\n", r);
1417                 return r;
1418         }
1419
1420         r = amdgpu_cs_pass1(&parser, data);
1421         if (r)
1422                 goto error_fini;
1423
1424         r = amdgpu_cs_pass2(&parser);
1425         if (r)
1426                 goto error_fini;
1427
1428         r = amdgpu_cs_parser_bos(&parser, data);
1429         if (r) {
1430                 if (r == -ENOMEM)
1431                         DRM_ERROR("Not enough memory for command submission!\n");
1432                 else if (r != -ERESTARTSYS && r != -EAGAIN)
1433                         DRM_DEBUG("Failed to process the buffer list %d!\n", r);
1434                 goto error_fini;
1435         }
1436
1437         r = amdgpu_cs_patch_jobs(&parser);
1438         if (r)
1439                 goto error_backoff;
1440
1441         r = amdgpu_cs_vm_handling(&parser);
1442         if (r)
1443                 goto error_backoff;
1444
1445         r = amdgpu_cs_sync_rings(&parser);
1446         if (r)
1447                 goto error_backoff;
1448
1449         trace_amdgpu_cs_ibs(&parser);
1450
1451         r = amdgpu_cs_submit(&parser, data);
1452         if (r)
1453                 goto error_backoff;
1454
1455         amdgpu_cs_parser_fini(&parser);
1456         return 0;
1457
1458 error_backoff:
1459         mutex_unlock(&parser.bo_list->bo_list_mutex);
1460
1461 error_fini:
1462         amdgpu_cs_parser_fini(&parser);
1463         return r;
1464 }
1465
1466 /**
1467  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
1468  *
1469  * @dev: drm device
1470  * @data: data from userspace
1471  * @filp: file private
1472  *
1473  * Wait for the command submission identified by handle to finish.
1474  */
1475 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
1476                          struct drm_file *filp)
1477 {
1478         union drm_amdgpu_wait_cs *wait = data;
1479         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
1480         struct drm_sched_entity *entity;
1481         struct amdgpu_ctx *ctx;
1482         struct dma_fence *fence;
1483         long r;
1484
1485         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
1486         if (ctx == NULL)
1487                 return -EINVAL;
1488
1489         r = amdgpu_ctx_get_entity(ctx, wait->in.ip_type, wait->in.ip_instance,
1490                                   wait->in.ring, &entity);
1491         if (r) {
1492                 amdgpu_ctx_put(ctx);
1493                 return r;
1494         }
1495
1496         fence = amdgpu_ctx_get_fence(ctx, entity, wait->in.handle);
1497         if (IS_ERR(fence))
1498                 r = PTR_ERR(fence);
1499         else if (fence) {
1500                 r = dma_fence_wait_timeout(fence, true, timeout);
1501                 if (r > 0 && fence->error)
1502                         r = fence->error;
1503                 dma_fence_put(fence);
1504         } else
1505                 r = 1;
1506
1507         amdgpu_ctx_put(ctx);
1508         if (r < 0)
1509                 return r;
1510
1511         memset(wait, 0, sizeof(*wait));
1512         wait->out.status = (r == 0);
1513
1514         return 0;
1515 }
1516
1517 /**
1518  * amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
1519  *
1520  * @adev: amdgpu device
1521  * @filp: file private
1522  * @user: drm_amdgpu_fence copied from user space
1523  */
1524 static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
1525                                              struct drm_file *filp,
1526                                              struct drm_amdgpu_fence *user)
1527 {
1528         struct drm_sched_entity *entity;
1529         struct amdgpu_ctx *ctx;
1530         struct dma_fence *fence;
1531         int r;
1532
1533         ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
1534         if (ctx == NULL)
1535                 return ERR_PTR(-EINVAL);
1536
1537         r = amdgpu_ctx_get_entity(ctx, user->ip_type, user->ip_instance,
1538                                   user->ring, &entity);
1539         if (r) {
1540                 amdgpu_ctx_put(ctx);
1541                 return ERR_PTR(r);
1542         }
1543
1544         fence = amdgpu_ctx_get_fence(ctx, entity, user->seq_no);
1545         amdgpu_ctx_put(ctx);
1546
1547         return fence;
1548 }
1549
1550 int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
1551                                     struct drm_file *filp)
1552 {
1553         struct amdgpu_device *adev = drm_to_adev(dev);
1554         union drm_amdgpu_fence_to_handle *info = data;
1555         struct dma_fence *fence;
1556         struct drm_syncobj *syncobj;
1557         struct sync_file *sync_file;
1558         int fd, r;
1559
1560         fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
1561         if (IS_ERR(fence))
1562                 return PTR_ERR(fence);
1563
1564         if (!fence)
1565                 fence = dma_fence_get_stub();
1566
1567         switch (info->in.what) {
1568         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
1569                 r = drm_syncobj_create(&syncobj, 0, fence);
1570                 dma_fence_put(fence);
1571                 if (r)
1572                         return r;
1573                 r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
1574                 drm_syncobj_put(syncobj);
1575                 return r;
1576
1577         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
1578                 r = drm_syncobj_create(&syncobj, 0, fence);
1579                 dma_fence_put(fence);
1580                 if (r)
1581                         return r;
1582                 r = drm_syncobj_get_fd(syncobj, (int *)&info->out.handle);
1583                 drm_syncobj_put(syncobj);
1584                 return r;
1585
1586         case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
1587                 fd = get_unused_fd_flags(O_CLOEXEC);
1588                 if (fd < 0) {
1589                         dma_fence_put(fence);
1590                         return fd;
1591                 }
1592
1593                 sync_file = sync_file_create(fence);
1594                 dma_fence_put(fence);
1595                 if (!sync_file) {
1596                         put_unused_fd(fd);
1597                         return -ENOMEM;
1598                 }
1599
1600                 fd_install(fd, sync_file->file);
1601                 info->out.handle = fd;
1602                 return 0;
1603
1604         default:
1605                 dma_fence_put(fence);
1606                 return -EINVAL;
1607         }
1608 }
1609
1610 /**
1611  * amdgpu_cs_wait_all_fences - wait on all fences to signal
1612  *
1613  * @adev: amdgpu device
1614  * @filp: file private
1615  * @wait: wait parameters
1616  * @fences: array of drm_amdgpu_fence
1617  */
1618 static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
1619                                      struct drm_file *filp,
1620                                      union drm_amdgpu_wait_fences *wait,
1621                                      struct drm_amdgpu_fence *fences)
1622 {
1623         uint32_t fence_count = wait->in.fence_count;
1624         unsigned int i;
1625         long r = 1;
1626
1627         for (i = 0; i < fence_count; i++) {
1628                 struct dma_fence *fence;
1629                 unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1630
1631                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1632                 if (IS_ERR(fence))
1633                         return PTR_ERR(fence);
1634                 else if (!fence)
1635                         continue;
1636
1637                 r = dma_fence_wait_timeout(fence, true, timeout);
1638                 if (r > 0 && fence->error)
1639                         r = fence->error;
1640
1641                 dma_fence_put(fence);
1642                 if (r < 0)
1643                         return r;
1644
1645                 if (r == 0)
1646                         break;
1647         }
1648
1649         memset(wait, 0, sizeof(*wait));
1650         wait->out.status = (r > 0);
1651
1652         return 0;
1653 }
1654
1655 /**
1656  * amdgpu_cs_wait_any_fence - wait on any fence to signal
1657  *
1658  * @adev: amdgpu device
1659  * @filp: file private
1660  * @wait: wait parameters
1661  * @fences: array of drm_amdgpu_fence
1662  */
1663 static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
1664                                     struct drm_file *filp,
1665                                     union drm_amdgpu_wait_fences *wait,
1666                                     struct drm_amdgpu_fence *fences)
1667 {
1668         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1669         uint32_t fence_count = wait->in.fence_count;
1670         uint32_t first = ~0;
1671         struct dma_fence **array;
1672         unsigned int i;
1673         long r;
1674
1675         /* Prepare the fence array */
1676         array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
1677
1678         if (array == NULL)
1679                 return -ENOMEM;
1680
1681         for (i = 0; i < fence_count; i++) {
1682                 struct dma_fence *fence;
1683
1684                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1685                 if (IS_ERR(fence)) {
1686                         r = PTR_ERR(fence);
1687                         goto err_free_fence_array;
1688                 } else if (fence) {
1689                         array[i] = fence;
1690                 } else { /* NULL, the fence has been already signaled */
1691                         r = 1;
1692                         first = i;
1693                         goto out;
1694                 }
1695         }
1696
1697         r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
1698                                        &first);
1699         if (r < 0)
1700                 goto err_free_fence_array;
1701
1702 out:
1703         memset(wait, 0, sizeof(*wait));
1704         wait->out.status = (r > 0);
1705         wait->out.first_signaled = first;
1706
1707         if (first < fence_count && array[first])
1708                 r = array[first]->error;
1709         else
1710                 r = 0;
1711
1712 err_free_fence_array:
1713         for (i = 0; i < fence_count; i++)
1714                 dma_fence_put(array[i]);
1715         kfree(array);
1716
1717         return r;
1718 }
1719
1720 /**
1721  * amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
1722  *
1723  * @dev: drm device
1724  * @data: data from userspace
1725  * @filp: file private
1726  */
1727 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
1728                                 struct drm_file *filp)
1729 {
1730         struct amdgpu_device *adev = drm_to_adev(dev);
1731         union drm_amdgpu_wait_fences *wait = data;
1732         uint32_t fence_count = wait->in.fence_count;
1733         struct drm_amdgpu_fence *fences_user;
1734         struct drm_amdgpu_fence *fences;
1735         int r;
1736
1737         /* Get the fences from userspace */
1738         fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
1739                         GFP_KERNEL);
1740         if (fences == NULL)
1741                 return -ENOMEM;
1742
1743         fences_user = u64_to_user_ptr(wait->in.fences);
1744         if (copy_from_user(fences, fences_user,
1745                 sizeof(struct drm_amdgpu_fence) * fence_count)) {
1746                 r = -EFAULT;
1747                 goto err_free_fences;
1748         }
1749
1750         if (wait->in.wait_all)
1751                 r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
1752         else
1753                 r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
1754
1755 err_free_fences:
1756         kfree(fences);
1757
1758         return r;
1759 }
1760
1761 /**
1762  * amdgpu_cs_find_mapping - find bo_va for VM address
1763  *
1764  * @parser: command submission parser context
1765  * @addr: VM address
1766  * @bo: resulting BO of the mapping found
1767  * @map: Placeholder to return found BO mapping
1768  *
1769  * Search the buffer objects in the command submission context for a certain
1770  * virtual memory address. Returns allocation structure when found, NULL
1771  * otherwise.
1772  */
1773 int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1774                            uint64_t addr, struct amdgpu_bo **bo,
1775                            struct amdgpu_bo_va_mapping **map)
1776 {
1777         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
1778         struct ttm_operation_ctx ctx = { false, false };
1779         struct amdgpu_vm *vm = &fpriv->vm;
1780         struct amdgpu_bo_va_mapping *mapping;
1781         int r;
1782
1783         addr /= AMDGPU_GPU_PAGE_SIZE;
1784
1785         mapping = amdgpu_vm_bo_lookup_mapping(vm, addr);
1786         if (!mapping || !mapping->bo_va || !mapping->bo_va->base.bo)
1787                 return -EINVAL;
1788
1789         *bo = mapping->bo_va->base.bo;
1790         *map = mapping;
1791
1792         /* Double check that the BO is reserved by this CS */
1793         if (dma_resv_locking_ctx((*bo)->tbo.base.resv) != &parser->exec.ticket)
1794                 return -EINVAL;
1795
1796         if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
1797                 (*bo)->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1798                 amdgpu_bo_placement_from_domain(*bo, (*bo)->allowed_domains);
1799                 r = ttm_bo_validate(&(*bo)->tbo, &(*bo)->placement, &ctx);
1800                 if (r)
1801                         return r;
1802         }
1803
1804         return amdgpu_ttm_alloc_gart(&(*bo)->tbo);
1805 }