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 #include <linux/list_sort.h>
  28 #include <linux/pagemap.h>
  29 #include <drm/drmP.h>
  30 #include <drm/amdgpu_drm.h>
  31 #include "amdgpu.h"
  32 #include "amdgpu_trace.h"
  33
  34 int amdgpu_cs_get_ring(struct amdgpu_device *adev, u32 ip_type,
  35                        u32 ip_instance, u32 ring,
  36                        struct amdgpu_ring **out_ring)
  37 {
  38         /* Right now all IPs have only one instance - multiple rings. */
  39         if (ip_instance != 0) {
  40                 DRM_ERROR("invalid ip instance: %d\n", ip_instance);
  41                 return -EINVAL;
  42         }
  43
  44         switch (ip_type) {
  45         default:
  46                 DRM_ERROR("unknown ip type: %d\n", ip_type);
  47                 return -EINVAL;
  48         case AMDGPU_HW_IP_GFX:
  49                 if (ring < adev->gfx.num_gfx_rings) {
  50                         *out_ring = &adev->gfx.gfx_ring[ring];
  51                 } else {
  52                         DRM_ERROR("only %d gfx rings are supported now\n",
  53                                   adev->gfx.num_gfx_rings);
  54                         return -EINVAL;
  55                 }
  56                 break;
  57         case AMDGPU_HW_IP_COMPUTE:
  58                 if (ring < adev->gfx.num_compute_rings) {
  59                         *out_ring = &adev->gfx.compute_ring[ring];
  60                 } else {
  61                         DRM_ERROR("only %d compute rings are supported now\n",
  62                                   adev->gfx.num_compute_rings);
  63                         return -EINVAL;
  64                 }
  65                 break;
  66         case AMDGPU_HW_IP_DMA:
  67                 if (ring < adev->sdma.num_instances) {
  68                         *out_ring = &adev->sdma.instance[ring].ring;
  69                 } else {
  70                         DRM_ERROR("only %d SDMA rings are supported\n",
  71                                   adev->sdma.num_instances);
  72                         return -EINVAL;
  73                 }
  74                 break;
  75         case AMDGPU_HW_IP_UVD:
  76                 *out_ring = &adev->uvd.ring;
  77                 break;
  78         case AMDGPU_HW_IP_VCE:
  79                 if (ring < 2){
  80                         *out_ring = &adev->vce.ring[ring];
  81                 } else {
  82                         DRM_ERROR("only two VCE rings are supported\n");
  83                         return -EINVAL;
  84                 }
  85                 break;
  86         }
  87         return 0;
  88 }
  89
  90 static int amdgpu_cs_user_fence_chunk(struct amdgpu_cs_parser *p,
  91                                       struct amdgpu_user_fence *uf,
  92                                       struct drm_amdgpu_cs_chunk_fence *fence_data)
  93 {
  94         struct drm_gem_object *gobj;
  95         uint32_t handle;
  96
  97         handle = fence_data->handle;
  98         gobj = drm_gem_object_lookup(p->adev->ddev, p->filp,
  99                                      fence_data->handle);
 100         if (gobj == NULL)
 101                 return -EINVAL;
 102
 103         uf->bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 104         uf->offset = fence_data->offset;
 105
 106         if (amdgpu_ttm_tt_get_usermm(uf->bo->tbo.ttm)) {
 107                 drm_gem_object_unreference_unlocked(gobj);
 108                 return -EINVAL;
 109         }
 110
 111         p->uf_entry.robj = amdgpu_bo_ref(uf->bo);
 112         p->uf_entry.priority = 0;
 113         p->uf_entry.tv.bo = &p->uf_entry.robj->tbo;
 114         p->uf_entry.tv.shared = true;
 115         p->uf_entry.user_pages = NULL;
 116
 117         drm_gem_object_unreference_unlocked(gobj);
 118         return 0;
 119 }
 120
 121 int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
 122 {
 123         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 124         union drm_amdgpu_cs *cs = data;
 125         uint64_t *chunk_array_user;
 126         uint64_t *chunk_array;
 127         struct amdgpu_user_fence uf = {};
 128         unsigned size, num_ibs = 0;
 129         int i;
 130         int ret;
 131
 132         if (cs->in.num_chunks == 0)
 133                 return 0;
 134
 135         chunk_array = kmalloc_array(cs->in.num_chunks, sizeof(uint64_t), GFP_KERNEL);
 136         if (!chunk_array)
 137                 return -ENOMEM;
 138
 139         p->ctx = amdgpu_ctx_get(fpriv, cs->in.ctx_id);
 140         if (!p->ctx) {
 141                 ret = -EINVAL;
 142                 goto free_chunk;
 143         }
 144
 145         /* get chunks */
 146         chunk_array_user = (uint64_t __user *)(unsigned long)(cs->in.chunks);
 147         if (copy_from_user(chunk_array, chunk_array_user,
 148                            sizeof(uint64_t)*cs->in.num_chunks)) {
 149                 ret = -EFAULT;
 150                 goto put_ctx;
 151         }
 152
 153         p->nchunks = cs->in.num_chunks;
 154         p->chunks = kmalloc_array(p->nchunks, sizeof(struct amdgpu_cs_chunk),
 155                             GFP_KERNEL);
 156         if (!p->chunks) {
 157                 ret = -ENOMEM;
 158                 goto put_ctx;
 159         }
 160
 161         for (i = 0; i < p->nchunks; i++) {
 162                 struct drm_amdgpu_cs_chunk __user **chunk_ptr = NULL;
 163                 struct drm_amdgpu_cs_chunk user_chunk;
 164                 uint32_t __user *cdata;
 165
 166                 chunk_ptr = (void __user *)(unsigned long)chunk_array[i];
 167                 if (copy_from_user(&user_chunk, chunk_ptr,
 168                                        sizeof(struct drm_amdgpu_cs_chunk))) {
 169                         ret = -EFAULT;
 170                         i--;
 171                         goto free_partial_kdata;
 172                 }
 173                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 174                 p->chunks[i].length_dw = user_chunk.length_dw;
 175
 176                 size = p->chunks[i].length_dw;
 177                 cdata = (void __user *)(unsigned long)user_chunk.chunk_data;
 178
 179                 p->chunks[i].kdata = drm_malloc_ab(size, sizeof(uint32_t));
 180                 if (p->chunks[i].kdata == NULL) {
 181                         ret = -ENOMEM;
 182                         i--;
 183                         goto free_partial_kdata;
 184                 }
 185                 size *= sizeof(uint32_t);
 186                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 187                         ret = -EFAULT;
 188                         goto free_partial_kdata;
 189                 }
 190
 191                 switch (p->chunks[i].chunk_id) {
 192                 case AMDGPU_CHUNK_ID_IB:
 193                         ++num_ibs;
 194                         break;
 195
 196                 case AMDGPU_CHUNK_ID_FENCE:
 197                         size = sizeof(struct drm_amdgpu_cs_chunk_fence);
 198                         if (p->chunks[i].length_dw * sizeof(uint32_t) < size) {
 199                                 ret = -EINVAL;
 200                                 goto free_partial_kdata;
 201                         }
 202
 203                         ret = amdgpu_cs_user_fence_chunk(p, &uf, (void *)p->chunks[i].kdata);
 204                         if (ret)
 205                                 goto free_partial_kdata;
 206
 207                         break;
 208
 209                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 210                         break;
 211
 212                 default:
 213                         ret = -EINVAL;
 214                         goto free_partial_kdata;
 215                 }
 216         }
 217
 218         ret = amdgpu_job_alloc(p->adev, num_ibs, &p->job);
 219         if (ret)
 220                 goto free_all_kdata;
 221
 222         p->job->uf = uf;
 223
 224         kfree(chunk_array);
 225         return 0;
 226
 227 free_all_kdata:
 228         i = p->nchunks - 1;
 229 free_partial_kdata:
 230         for (; i >= 0; i--)
 231                 drm_free_large(p->chunks[i].kdata);
 232         kfree(p->chunks);
 233 put_ctx:
 234         amdgpu_ctx_put(p->ctx);
 235 free_chunk:
 236         kfree(chunk_array);
 237
 238         return ret;
 239 }
 240
 241 /* Returns how many bytes TTM can move per IB.
 242  */
 243 static u64 amdgpu_cs_get_threshold_for_moves(struct amdgpu_device *adev)
 244 {
 245         u64 real_vram_size = adev->mc.real_vram_size;
 246         u64 vram_usage = atomic64_read(&adev->vram_usage);
 247
 248         /* This function is based on the current VRAM usage.
 249          *
 250          * - If all of VRAM is free, allow relocating the number of bytes that
 251          *   is equal to 1/4 of the size of VRAM for this IB.
 252
 253          * - If more than one half of VRAM is occupied, only allow relocating
 254          *   1 MB of data for this IB.
 255          *
 256          * - From 0 to one half of used VRAM, the threshold decreases
 257          *   linearly.
 258          *         __________________
 259          * 1/4 of -|\               |
 260          * VRAM    | \              |
 261          *         |  \             |
 262          *         |   \            |
 263          *         |    \           |
 264          *         |     \          |
 265          *         |      \         |
 266          *         |       \________|1 MB
 267          *         |----------------|
 268          *    VRAM 0 %             100 %
 269          *         used            used
 270          *
 271          * Note: It's a threshold, not a limit. The threshold must be crossed
 272          * for buffer relocations to stop, so any buffer of an arbitrary size
 273          * can be moved as long as the threshold isn't crossed before
 274          * the relocation takes place. We don't want to disable buffer
 275          * relocations completely.
 276          *
 277          * The idea is that buffers should be placed in VRAM at creation time
 278          * and TTM should only do a minimum number of relocations during
 279          * command submission. In practice, you need to submit at least
 280          * a dozen IBs to move all buffers to VRAM if they are in GTT.
 281          *
 282          * Also, things can get pretty crazy under memory pressure and actual
 283          * VRAM usage can change a lot, so playing safe even at 50% does
 284          * consistently increase performance.
 285          */
 286
 287         u64 half_vram = real_vram_size >> 1;
 288         u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
 289         u64 bytes_moved_threshold = half_free_vram >> 1;
 290         return max(bytes_moved_threshold, 1024*1024ull);
 291 }
 292
 293 int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 294                             struct list_head *validated)
 295 {
 296         struct amdgpu_bo_list_entry *lobj;
 297         u64 initial_bytes_moved;
 298         int r;
 299
 300         list_for_each_entry(lobj, validated, tv.head) {
 301                 struct amdgpu_bo *bo = lobj->robj;
 302                 bool binding_userptr = false;
 303                 struct mm_struct *usermm;
 304                 uint32_t domain;
 305
 306                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 307                 if (usermm && usermm != current->mm)
 308                         return -EPERM;
 309
 310                 /* Check if we have user pages and nobody bound the BO already */
 311                 if (lobj->user_pages && bo->tbo.ttm->state != tt_bound) {
 312                         size_t size = sizeof(struct page *);
 313
 314                         size *= bo->tbo.ttm->num_pages;
 315                         memcpy(bo->tbo.ttm->pages, lobj->user_pages, size);
 316                         binding_userptr = true;
 317                 }
 318
 319                 if (bo->pin_count)
 320                         continue;
 321
 322                 /* Avoid moving this one if we have moved too many buffers
 323                  * for this IB already.
 324                  *
 325                  * Note that this allows moving at least one buffer of
 326                  * any size, because it doesn't take the current "bo"
 327                  * into account. We don't want to disallow buffer moves
 328                  * completely.
 329                  */
 330                 if (p->bytes_moved <= p->bytes_moved_threshold)
 331                         domain = bo->prefered_domains;
 332                 else
 333                         domain = bo->allowed_domains;
 334
 335         retry:
 336                 amdgpu_ttm_placement_from_domain(bo, domain);
 337                 initial_bytes_moved = atomic64_read(&bo->adev->num_bytes_moved);
 338                 r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 339                 p->bytes_moved += atomic64_read(&bo->adev->num_bytes_moved) -
 340                                initial_bytes_moved;
 341
 342                 if (unlikely(r)) {
 343                         if (r != -ERESTARTSYS && domain != bo->allowed_domains) {
 344                                 domain = bo->allowed_domains;
 345                                 goto retry;
 346                         }
 347                         return r;
 348                 }
 349
 350                 if (binding_userptr) {
 351                         drm_free_large(lobj->user_pages);
 352                         lobj->user_pages = NULL;
 353                 }
 354         }
 355         return 0;
 356 }
 357
 358 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 359                                 union drm_amdgpu_cs *cs)
 360 {
 361         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 362         struct amdgpu_bo_list_entry *e;
 363         struct list_head duplicates;
 364         bool need_mmap_lock = false;
 365         unsigned i, tries = 10;
 366         int r;
 367
 368         INIT_LIST_HEAD(&p->validated);
 369
 370         p->bo_list = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle);
 371         if (p->bo_list) {
 372                 need_mmap_lock = p->bo_list->first_userptr !=
 373                         p->bo_list->num_entries;
 374                 amdgpu_bo_list_get_list(p->bo_list, &p->validated);
 375         }
 376
 377         INIT_LIST_HEAD(&duplicates);
 378         amdgpu_vm_get_pd_bo(&fpriv->vm, &p->validated, &p->vm_pd);
 379
 380         if (p->job->uf.bo)
 381                 list_add(&p->uf_entry.tv.head, &p->validated);
 382
 383         if (need_mmap_lock)
 384                 down_read(&current->mm->mmap_sem);
 385
 386         while (1) {
 387                 struct list_head need_pages;
 388                 unsigned i;
 389
 390                 r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true,
 391                                            &duplicates);
 392                 if (unlikely(r != 0))
 393                         goto error_free_pages;
 394
 395                 /* Without a BO list we don't have userptr BOs */
 396                 if (!p->bo_list)
 397                         break;
 398
 399                 INIT_LIST_HEAD(&need_pages);
 400                 for (i = p->bo_list->first_userptr;
 401                      i < p->bo_list->num_entries; ++i) {
 402
 403                         e = &p->bo_list->array[i];
 404
 405                         if (amdgpu_ttm_tt_userptr_invalidated(e->robj->tbo.ttm,
 406                                  &e->user_invalidated) && e->user_pages) {
 407
 408                                 /* We acquired a page array, but somebody
 409                                  * invalidated it. Free it an try again
 410                                  */
 411                                 release_pages(e->user_pages,
 412                                               e->robj->tbo.ttm->num_pages,
 413                                               false);
 414                                 drm_free_large(e->user_pages);
 415                                 e->user_pages = NULL;
 416                         }
 417
 418                         if (e->robj->tbo.ttm->state != tt_bound &&
 419                             !e->user_pages) {
 420                                 list_del(&e->tv.head);
 421                                 list_add(&e->tv.head, &need_pages);
 422
 423                                 amdgpu_bo_unreserve(e->robj);
 424                         }
 425                 }
 426
 427                 if (list_empty(&need_pages))
 428                         break;
 429
 430                 /* Unreserve everything again. */
 431                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 432
 433                 /* We tried to often, just abort */
 434                 if (!--tries) {
 435                         r = -EDEADLK;
 436                         goto error_free_pages;
 437                 }
 438
 439                 /* Fill the page arrays for all useptrs. */
 440                 list_for_each_entry(e, &need_pages, tv.head) {
 441                         struct ttm_tt *ttm = e->robj->tbo.ttm;
 442
 443                         e->user_pages = drm_calloc_large(ttm->num_pages,
 444                                                          sizeof(struct page*));
 445                         if (!e->user_pages) {
 446                                 r = -ENOMEM;
 447                                 goto error_free_pages;
 448                         }
 449
 450                         r = amdgpu_ttm_tt_get_user_pages(ttm, e->user_pages);
 451                         if (r) {
 452                                 drm_free_large(e->user_pages);
 453                                 e->user_pages = NULL;
 454                                 goto error_free_pages;
 455                         }
 456                 }
 457
 458                 /* And try again. */
 459                 list_splice(&need_pages, &p->validated);
 460         }
 461
 462         amdgpu_vm_get_pt_bos(&fpriv->vm, &duplicates);
 463
 464         p->bytes_moved_threshold = amdgpu_cs_get_threshold_for_moves(p->adev);
 465         p->bytes_moved = 0;
 466
 467         r = amdgpu_cs_list_validate(p, &duplicates);
 468         if (r)
 469                 goto error_validate;
 470
 471         r = amdgpu_cs_list_validate(p, &p->validated);
 472         if (r)
 473                 goto error_validate;
 474
 475         if (p->bo_list) {
 476                 struct amdgpu_vm *vm = &fpriv->vm;
 477                 unsigned i;
 478
 479                 for (i = 0; i < p->bo_list->num_entries; i++) {
 480                         struct amdgpu_bo *bo = p->bo_list->array[i].robj;
 481
 482                         p->bo_list->array[i].bo_va = amdgpu_vm_bo_find(vm, bo);
 483                 }
 484         }
 485
 486 error_validate:
 487         if (r) {
 488                 amdgpu_vm_move_pt_bos_in_lru(p->adev, &fpriv->vm);
 489                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 490         }
 491
 492 error_free_pages:
 493
 494         if (need_mmap_lock)
 495                 up_read(&current->mm->mmap_sem);
 496
 497         if (p->bo_list) {
 498                 for (i = p->bo_list->first_userptr;
 499                      i < p->bo_list->num_entries; ++i) {
 500                         e = &p->bo_list->array[i];
 501
 502                         if (!e->user_pages)
 503                                 continue;
 504
 505                         release_pages(e->user_pages,
 506                                       e->robj->tbo.ttm->num_pages,
 507                                       false);
 508                         drm_free_large(e->user_pages);
 509                 }
 510         }
 511
 512         return r;
 513 }
 514
 515 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 516 {
 517         struct amdgpu_bo_list_entry *e;
 518         int r;
 519
 520         list_for_each_entry(e, &p->validated, tv.head) {
 521                 struct reservation_object *resv = e->robj->tbo.resv;
 522                 r = amdgpu_sync_resv(p->adev, &p->job->sync, resv, p->filp);
 523
 524                 if (r)
 525                         return r;
 526         }
 527         return 0;
 528 }
 529
 530 static int cmp_size_smaller_first(void *priv, struct list_head *a,
 531                                   struct list_head *b)
 532 {
 533         struct amdgpu_bo_list_entry *la = list_entry(a, struct amdgpu_bo_list_entry, tv.head);
 534         struct amdgpu_bo_list_entry *lb = list_entry(b, struct amdgpu_bo_list_entry, tv.head);
 535
 536         /* Sort A before B if A is smaller. */
 537         return (int)la->robj->tbo.num_pages - (int)lb->robj->tbo.num_pages;
 538 }
 539
 540 /**
 541  * cs_parser_fini() - clean parser states
 542  * @parser:     parser structure holding parsing context.
 543  * @error:      error number
 544  *
 545  * If error is set than unvalidate buffer, otherwise just free memory
 546  * used by parsing context.
 547  **/
 548 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, bool backoff)
 549 {
 550         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
 551         unsigned i;
 552
 553         if (!error) {
 554                 amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
 555
 556                 /* Sort the buffer list from the smallest to largest buffer,
 557                  * which affects the order of buffers in the LRU list.
 558                  * This assures that the smallest buffers are added first
 559                  * to the LRU list, so they are likely to be later evicted
 560                  * first, instead of large buffers whose eviction is more
 561                  * expensive.
 562                  *
 563                  * This slightly lowers the number of bytes moved by TTM
 564                  * per frame under memory pressure.
 565                  */
 566                 list_sort(NULL, &parser->validated, cmp_size_smaller_first);
 567
 568                 ttm_eu_fence_buffer_objects(&parser->ticket,
 569                                             &parser->validated,
 570                                             parser->fence);
 571         } else if (backoff) {
 572                 ttm_eu_backoff_reservation(&parser->ticket,
 573                                            &parser->validated);
 574         }
 575         fence_put(parser->fence);
 576
 577         if (parser->ctx)
 578                 amdgpu_ctx_put(parser->ctx);
 579         if (parser->bo_list)
 580                 amdgpu_bo_list_put(parser->bo_list);
 581
 582         for (i = 0; i < parser->nchunks; i++)
 583                 drm_free_large(parser->chunks[i].kdata);
 584         kfree(parser->chunks);
 585         if (parser->job)
 586                 amdgpu_job_free(parser->job);
 587         amdgpu_bo_unref(&parser->uf_entry.robj);
 588 }
 589
 590 static int amdgpu_bo_vm_update_pte(struct amdgpu_cs_parser *p,
 591                                    struct amdgpu_vm *vm)
 592 {
 593         struct amdgpu_device *adev = p->adev;
 594         struct amdgpu_bo_va *bo_va;
 595         struct amdgpu_bo *bo;
 596         int i, r;
 597
 598         r = amdgpu_vm_update_page_directory(adev, vm);
 599         if (r)
 600                 return r;
 601
 602         r = amdgpu_sync_fence(adev, &p->job->sync, vm->page_directory_fence);
 603         if (r)
 604                 return r;
 605
 606         r = amdgpu_vm_clear_freed(adev, vm);
 607         if (r)
 608                 return r;
 609
 610         if (p->bo_list) {
 611                 for (i = 0; i < p->bo_list->num_entries; i++) {
 612                         struct fence *f;
 613
 614                         /* ignore duplicates */
 615                         bo = p->bo_list->array[i].robj;
 616                         if (!bo)
 617                                 continue;
 618
 619                         bo_va = p->bo_list->array[i].bo_va;
 620                         if (bo_va == NULL)
 621                                 continue;
 622
 623                         r = amdgpu_vm_bo_update(adev, bo_va, &bo->tbo.mem);
 624                         if (r)
 625                                 return r;
 626
 627                         f = bo_va->last_pt_update;
 628                         r = amdgpu_sync_fence(adev, &p->job->sync, f);
 629                         if (r)
 630                                 return r;
 631                 }
 632
 633         }
 634
 635         r = amdgpu_vm_clear_invalids(adev, vm, &p->job->sync);
 636
 637         if (amdgpu_vm_debug && p->bo_list) {
 638                 /* Invalidate all BOs to test for userspace bugs */
 639                 for (i = 0; i < p->bo_list->num_entries; i++) {
 640                         /* ignore duplicates */
 641                         bo = p->bo_list->array[i].robj;
 642                         if (!bo)
 643                                 continue;
 644
 645                         amdgpu_vm_bo_invalidate(adev, bo);
 646                 }
 647         }
 648
 649         return r;
 650 }
 651
 652 static int amdgpu_cs_ib_vm_chunk(struct amdgpu_device *adev,
 653                                  struct amdgpu_cs_parser *p)
 654 {
 655         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 656         struct amdgpu_vm *vm = &fpriv->vm;
 657         struct amdgpu_ring *ring = p->job->ring;
 658         int i, r;
 659
 660         /* Only for UVD/VCE VM emulation */
 661         if (ring->funcs->parse_cs) {
 662                 for (i = 0; i < p->job->num_ibs; i++) {
 663                         r = amdgpu_ring_parse_cs(ring, p, i);
 664                         if (r)
 665                                 return r;
 666                 }
 667         }
 668
 669         r = amdgpu_bo_vm_update_pte(p, vm);
 670         if (!r)
 671                 amdgpu_cs_sync_rings(p);
 672
 673         return r;
 674 }
 675
 676 static int amdgpu_cs_handle_lockup(struct amdgpu_device *adev, int r)
 677 {
 678         if (r == -EDEADLK) {
 679                 r = amdgpu_gpu_reset(adev);
 680                 if (!r)
 681                         r = -EAGAIN;
 682         }
 683         return r;
 684 }
 685
 686 static int amdgpu_cs_ib_fill(struct amdgpu_device *adev,
 687                              struct amdgpu_cs_parser *parser)
 688 {
 689         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
 690         struct amdgpu_vm *vm = &fpriv->vm;
 691         int i, j;
 692         int r;
 693
 694         for (i = 0, j = 0; i < parser->nchunks && j < parser->job->num_ibs; i++) {
 695                 struct amdgpu_cs_chunk *chunk;
 696                 struct amdgpu_ib *ib;
 697                 struct drm_amdgpu_cs_chunk_ib *chunk_ib;
 698                 struct amdgpu_ring *ring;
 699
 700                 chunk = &parser->chunks[i];
 701                 ib = &parser->job->ibs[j];
 702                 chunk_ib = (struct drm_amdgpu_cs_chunk_ib *)chunk->kdata;
 703
 704                 if (chunk->chunk_id != AMDGPU_CHUNK_ID_IB)
 705                         continue;
 706
 707                 r = amdgpu_cs_get_ring(adev, chunk_ib->ip_type,
 708                                        chunk_ib->ip_instance, chunk_ib->ring,
 709                                        &ring);
 710                 if (r)
 711                         return r;
 712
 713                 if (parser->job->ring && parser->job->ring != ring)
 714                         return -EINVAL;
 715
 716                 parser->job->ring = ring;
 717
 718                 if (ring->funcs->parse_cs) {
 719                         struct amdgpu_bo_va_mapping *m;
 720                         struct amdgpu_bo *aobj = NULL;
 721                         uint64_t offset;
 722                         uint8_t *kptr;
 723
 724                         m = amdgpu_cs_find_mapping(parser, chunk_ib->va_start,
 725                                                    &aobj);
 726                         if (!aobj) {
 727                                 DRM_ERROR("IB va_start is invalid\n");
 728                                 return -EINVAL;
 729                         }
 730
 731                         if ((chunk_ib->va_start + chunk_ib->ib_bytes) >
 732                             (m->it.last + 1) * AMDGPU_GPU_PAGE_SIZE) {
 733                                 DRM_ERROR("IB va_start+ib_bytes is invalid\n");
 734                                 return -EINVAL;
 735                         }
 736
 737                         /* the IB should be reserved at this point */
 738                         r = amdgpu_bo_kmap(aobj, (void **)&kptr);
 739                         if (r) {
 740                                 return r;
 741                         }
 742
 743                         offset = ((uint64_t)m->it.start) * AMDGPU_GPU_PAGE_SIZE;
 744                         kptr += chunk_ib->va_start - offset;
 745
 746                         r =  amdgpu_ib_get(adev, NULL, chunk_ib->ib_bytes, ib);
 747                         if (r) {
 748                                 DRM_ERROR("Failed to get ib !\n");
 749                                 return r;
 750                         }
 751
 752                         memcpy(ib->ptr, kptr, chunk_ib->ib_bytes);
 753                         amdgpu_bo_kunmap(aobj);
 754                 } else {
 755                         r =  amdgpu_ib_get(adev, vm, 0, ib);
 756                         if (r) {
 757                                 DRM_ERROR("Failed to get ib !\n");
 758                                 return r;
 759                         }
 760
 761                         ib->gpu_addr = chunk_ib->va_start;
 762                 }
 763
 764                 ib->length_dw = chunk_ib->ib_bytes / 4;
 765                 ib->flags = chunk_ib->flags;
 766                 ib->ctx = parser->ctx;
 767                 j++;
 768         }
 769
 770         /* add GDS resources to first IB */
 771         if (parser->bo_list) {
 772                 struct amdgpu_bo *gds = parser->bo_list->gds_obj;
 773                 struct amdgpu_bo *gws = parser->bo_list->gws_obj;
 774                 struct amdgpu_bo *oa = parser->bo_list->oa_obj;
 775                 struct amdgpu_ib *ib = &parser->job->ibs[0];
 776
 777                 if (gds) {
 778                         ib->gds_base = amdgpu_bo_gpu_offset(gds);
 779                         ib->gds_size = amdgpu_bo_size(gds);
 780                 }
 781                 if (gws) {
 782                         ib->gws_base = amdgpu_bo_gpu_offset(gws);
 783                         ib->gws_size = amdgpu_bo_size(gws);
 784                 }
 785                 if (oa) {
 786                         ib->oa_base = amdgpu_bo_gpu_offset(oa);
 787                         ib->oa_size = amdgpu_bo_size(oa);
 788                 }
 789         }
 790         /* wrap the last IB with user fence */
 791         if (parser->job->uf.bo) {
 792                 struct amdgpu_ib *ib = &parser->job->ibs[parser->job->num_ibs - 1];
 793
 794                 /* UVD & VCE fw doesn't support user fences */
 795                 if (parser->job->ring->type == AMDGPU_RING_TYPE_UVD ||
 796                     parser->job->ring->type == AMDGPU_RING_TYPE_VCE)
 797                         return -EINVAL;
 798
 799                 ib->user = &parser->job->uf;
 800         }
 801
 802         return 0;
 803 }
 804
 805 static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
 806                                   struct amdgpu_cs_parser *p)
 807 {
 808         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 809         int i, j, r;
 810
 811         for (i = 0; i < p->nchunks; ++i) {
 812                 struct drm_amdgpu_cs_chunk_dep *deps;
 813                 struct amdgpu_cs_chunk *chunk;
 814                 unsigned num_deps;
 815
 816                 chunk = &p->chunks[i];
 817
 818                 if (chunk->chunk_id != AMDGPU_CHUNK_ID_DEPENDENCIES)
 819                         continue;
 820
 821                 deps = (struct drm_amdgpu_cs_chunk_dep *)chunk->kdata;
 822                 num_deps = chunk->length_dw * 4 /
 823                         sizeof(struct drm_amdgpu_cs_chunk_dep);
 824
 825                 for (j = 0; j < num_deps; ++j) {
 826                         struct amdgpu_ring *ring;
 827                         struct amdgpu_ctx *ctx;
 828                         struct fence *fence;
 829
 830                         r = amdgpu_cs_get_ring(adev, deps[j].ip_type,
 831                                                deps[j].ip_instance,
 832                                                deps[j].ring, &ring);
 833                         if (r)
 834                                 return r;
 835
 836                         ctx = amdgpu_ctx_get(fpriv, deps[j].ctx_id);
 837                         if (ctx == NULL)
 838                                 return -EINVAL;
 839
 840                         fence = amdgpu_ctx_get_fence(ctx, ring,
 841                                                      deps[j].handle);
 842                         if (IS_ERR(fence)) {
 843                                 r = PTR_ERR(fence);
 844                                 amdgpu_ctx_put(ctx);
 845                                 return r;
 846
 847                         } else if (fence) {
 848                                 r = amdgpu_sync_fence(adev, &p->job->sync,
 849                                                       fence);
 850                                 fence_put(fence);
 851                                 amdgpu_ctx_put(ctx);
 852                                 if (r)
 853                                         return r;
 854                         }
 855                 }
 856         }
 857
 858         return 0;
 859 }
 860
 861 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 862                             union drm_amdgpu_cs *cs)
 863 {
 864         struct amdgpu_ring *ring = p->job->ring;
 865         struct amd_sched_fence *fence;
 866         struct amdgpu_job *job;
 867
 868         job = p->job;
 869         p->job = NULL;
 870
 871         job->base.sched = &ring->sched;
 872         job->base.s_entity = &p->ctx->rings[ring->idx].entity;
 873         job->owner = p->filp;
 874
 875         fence = amd_sched_fence_create(job->base.s_entity, p->filp);
 876         if (!fence) {
 877                 amdgpu_job_free(job);
 878                 return -ENOMEM;
 879         }
 880
 881         job->base.s_fence = fence;
 882         p->fence = fence_get(&fence->base);
 883
 884         cs->out.handle = amdgpu_ctx_add_fence(p->ctx, ring,
 885                                               &fence->base);
 886         job->ibs[job->num_ibs - 1].sequence = cs->out.handle;
 887
 888         trace_amdgpu_cs_ioctl(job);
 889         amd_sched_entity_push_job(&job->base);
 890
 891         return 0;
 892 }
 893
 894 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 895 {
 896         struct amdgpu_device *adev = dev->dev_private;
 897         union drm_amdgpu_cs *cs = data;
 898         struct amdgpu_cs_parser parser = {};
 899         bool reserved_buffers = false;
 900         int i, r;
 901
 902         if (!adev->accel_working)
 903                 return -EBUSY;
 904
 905         parser.adev = adev;
 906         parser.filp = filp;
 907
 908         r = amdgpu_cs_parser_init(&parser, data);
 909         if (r) {
 910                 DRM_ERROR("Failed to initialize parser !\n");
 911                 amdgpu_cs_parser_fini(&parser, r, false);
 912                 r = amdgpu_cs_handle_lockup(adev, r);
 913                 return r;
 914         }
 915         r = amdgpu_cs_parser_bos(&parser, data);
 916         if (r == -ENOMEM)
 917                 DRM_ERROR("Not enough memory for command submission!\n");
 918         else if (r && r != -ERESTARTSYS)
 919                 DRM_ERROR("Failed to process the buffer list %d!\n", r);
 920         else if (!r) {
 921                 reserved_buffers = true;
 922                 r = amdgpu_cs_ib_fill(adev, &parser);
 923         }
 924
 925         if (!r) {
 926                 r = amdgpu_cs_dependencies(adev, &parser);
 927                 if (r)
 928                         DRM_ERROR("Failed in the dependencies handling %d!\n", r);
 929         }
 930
 931         if (r)
 932                 goto out;
 933
 934         for (i = 0; i < parser.job->num_ibs; i++)
 935                 trace_amdgpu_cs(&parser, i);
 936
 937         r = amdgpu_cs_ib_vm_chunk(adev, &parser);
 938         if (r)
 939                 goto out;
 940
 941         r = amdgpu_cs_submit(&parser, cs);
 942
 943 out:
 944         amdgpu_cs_parser_fini(&parser, r, reserved_buffers);
 945         r = amdgpu_cs_handle_lockup(adev, r);
 946         return r;
 947 }
 948
 949 /**
 950  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
 951  *
 952  * @dev: drm device
 953  * @data: data from userspace
 954  * @filp: file private
 955  *
 956  * Wait for the command submission identified by handle to finish.
 957  */
 958 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
 959                          struct drm_file *filp)
 960 {
 961         union drm_amdgpu_wait_cs *wait = data;
 962         struct amdgpu_device *adev = dev->dev_private;
 963         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
 964         struct amdgpu_ring *ring = NULL;
 965         struct amdgpu_ctx *ctx;
 966         struct fence *fence;
 967         long r;
 968
 969         r = amdgpu_cs_get_ring(adev, wait->in.ip_type, wait->in.ip_instance,
 970                                wait->in.ring, &ring);
 971         if (r)
 972                 return r;
 973
 974         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
 975         if (ctx == NULL)
 976                 return -EINVAL;
 977
 978         fence = amdgpu_ctx_get_fence(ctx, ring, wait->in.handle);
 979         if (IS_ERR(fence))
 980                 r = PTR_ERR(fence);
 981         else if (fence) {
 982                 r = fence_wait_timeout(fence, true, timeout);
 983                 fence_put(fence);
 984         } else
 985                 r = 1;
 986
 987         amdgpu_ctx_put(ctx);
 988         if (r < 0)
 989                 return r;
 990
 991         memset(wait, 0, sizeof(*wait));
 992         wait->out.status = (r == 0);
 993
 994         return 0;
 995 }
 996
 997 /**
 998  * amdgpu_cs_find_bo_va - find bo_va for VM address
 999  *
1000  * @parser: command submission parser context
1001  * @addr: VM address
1002  * @bo: resulting BO of the mapping found
1003  *
1004  * Search the buffer objects in the command submission context for a certain
1005  * virtual memory address. Returns allocation structure when found, NULL
1006  * otherwise.
1007  */
1008 struct amdgpu_bo_va_mapping *
1009 amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1010                        uint64_t addr, struct amdgpu_bo **bo)
1011 {
1012         struct amdgpu_bo_va_mapping *mapping;
1013         unsigned i;
1014
1015         if (!parser->bo_list)
1016                 return NULL;
1017
1018         addr /= AMDGPU_GPU_PAGE_SIZE;
1019
1020         for (i = 0; i < parser->bo_list->num_entries; i++) {
1021                 struct amdgpu_bo_list_entry *lobj;
1022
1023                 lobj = &parser->bo_list->array[i];
1024                 if (!lobj->bo_va)
1025                         continue;
1026
1027                 list_for_each_entry(mapping, &lobj->bo_va->valids, list) {
1028                         if (mapping->it.start > addr ||
1029                             addr > mapping->it.last)
1030                                 continue;
1031
1032                         *bo = lobj->bo_va->bo;
1033                         return mapping;
1034                 }
1035
1036                 list_for_each_entry(mapping, &lobj->bo_va->invalids, list) {
1037                         if (mapping->it.start > addr ||
1038                             addr > mapping->it.last)
1039                                 continue;
1040
1041                         *bo = lobj->bo_va->bo;
1042                         return mapping;
1043                 }
1044         }
1045
1046         return NULL;
1047 }