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