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

   1 /*
   2  * Copyright 2008 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jerome Glisse <glisse@freedesktop.org>
  26  */
  27 #include <linux/pagemap.h>
  28 #include <drm/drmP.h>
  29 #include <drm/amdgpu_drm.h>
  30 #include "amdgpu.h"
  31 #include "amdgpu_trace.h"
  32
  33 int amdgpu_cs_get_ring(struct amdgpu_device *adev, u32 ip_type,
  34                        u32 ip_instance, u32 ring,
  35                        struct amdgpu_ring **out_ring)
  36 {
  37         /* Right now all IPs have only one instance - multiple rings. */
  38         if (ip_instance != 0) {
  39                 DRM_ERROR("invalid ip instance: %d\n", ip_instance);
  40                 return -EINVAL;
  41         }
  42
  43         switch (ip_type) {
  44         default:
  45                 DRM_ERROR("unknown ip type: %d\n", ip_type);
  46                 return -EINVAL;
  47         case AMDGPU_HW_IP_GFX:
  48                 if (ring < adev->gfx.num_gfx_rings) {
  49                         *out_ring = &adev->gfx.gfx_ring[ring];
  50                 } else {
  51                         DRM_ERROR("only %d gfx rings are supported now\n",
  52                                   adev->gfx.num_gfx_rings);
  53                         return -EINVAL;
  54                 }
  55                 break;
  56         case AMDGPU_HW_IP_COMPUTE:
  57                 if (ring < adev->gfx.num_compute_rings) {
  58                         *out_ring = &adev->gfx.compute_ring[ring];
  59                 } else {
  60                         DRM_ERROR("only %d compute rings are supported now\n",
  61                                   adev->gfx.num_compute_rings);
  62                         return -EINVAL;
  63                 }
  64                 break;
  65         case AMDGPU_HW_IP_DMA:
  66                 if (ring < adev->sdma.num_instances) {
  67                         *out_ring = &adev->sdma.instance[ring].ring;
  68                 } else {
  69                         DRM_ERROR("only %d SDMA rings are supported\n",
  70                                   adev->sdma.num_instances);
  71                         return -EINVAL;
  72                 }
  73                 break;
  74         case AMDGPU_HW_IP_UVD:
  75                 *out_ring = &adev->uvd.ring;
  76                 break;
  77         case AMDGPU_HW_IP_VCE:
  78                 if (ring < 2){
  79                         *out_ring = &adev->vce.ring[ring];
  80                 } else {
  81                         DRM_ERROR("only two VCE rings are supported\n");
  82                         return -EINVAL;
  83                 }
  84                 break;
  85         }
  86         return 0;
  87 }
  88
  89 static int amdgpu_cs_user_fence_chunk(struct amdgpu_cs_parser *p,
  90                                       struct drm_amdgpu_cs_chunk_fence *data,
  91                                       uint32_t *offset)
  92 {
  93         struct drm_gem_object *gobj;
  94         unsigned long size;
  95
  96         gobj = drm_gem_object_lookup(p->filp, data->handle);
  97         if (gobj == NULL)
  98                 return -EINVAL;
  99
 100         p->uf_entry.robj = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 101         p->uf_entry.priority = 0;
 102         p->uf_entry.tv.bo = &p->uf_entry.robj->tbo;
 103         p->uf_entry.tv.shared = true;
 104         p->uf_entry.user_pages = NULL;
 105
 106         size = amdgpu_bo_size(p->uf_entry.robj);
 107         if (size != PAGE_SIZE || (data->offset + 8) > size)
 108                 return -EINVAL;
 109
 110         *offset = data->offset;
 111
 112         drm_gem_object_unreference_unlocked(gobj);
 113
 114         if (amdgpu_ttm_tt_get_usermm(p->uf_entry.robj->tbo.ttm)) {
 115                 amdgpu_bo_unref(&p->uf_entry.robj);
 116                 return -EINVAL;
 117         }
 118
 119         return 0;
 120 }
 121
 122 int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
 123 {
 124         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 125         struct amdgpu_vm *vm = &fpriv->vm;
 126         union drm_amdgpu_cs *cs = data;
 127         uint64_t *chunk_array_user;
 128         uint64_t *chunk_array;
 129         unsigned size, num_ibs = 0;
 130         uint32_t uf_offset = 0;
 131         int i;
 132         int ret;
 133
 134         if (cs->in.num_chunks == 0)
 135                 return 0;
 136
 137         chunk_array = kmalloc_array(cs->in.num_chunks, sizeof(uint64_t), GFP_KERNEL);
 138         if (!chunk_array)
 139                 return -ENOMEM;
 140
 141         p->ctx = amdgpu_ctx_get(fpriv, cs->in.ctx_id);
 142         if (!p->ctx) {
 143                 ret = -EINVAL;
 144                 goto free_chunk;
 145         }
 146
 147         /* get chunks */
 148         chunk_array_user = (uint64_t __user *)(unsigned long)(cs->in.chunks);
 149         if (copy_from_user(chunk_array, chunk_array_user,
 150                            sizeof(uint64_t)*cs->in.num_chunks)) {
 151                 ret = -EFAULT;
 152                 goto put_ctx;
 153         }
 154
 155         p->nchunks = cs->in.num_chunks;
 156         p->chunks = kmalloc_array(p->nchunks, sizeof(struct amdgpu_cs_chunk),
 157                             GFP_KERNEL);
 158         if (!p->chunks) {
 159                 ret = -ENOMEM;
 160                 goto put_ctx;
 161         }
 162
 163         for (i = 0; i < p->nchunks; i++) {
 164                 struct drm_amdgpu_cs_chunk __user **chunk_ptr = NULL;
 165                 struct drm_amdgpu_cs_chunk user_chunk;
 166                 uint32_t __user *cdata;
 167
 168                 chunk_ptr = (void __user *)(unsigned long)chunk_array[i];
 169                 if (copy_from_user(&user_chunk, chunk_ptr,
 170                                        sizeof(struct drm_amdgpu_cs_chunk))) {
 171                         ret = -EFAULT;
 172                         i--;
 173                         goto free_partial_kdata;
 174                 }
 175                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 176                 p->chunks[i].length_dw = user_chunk.length_dw;
 177
 178                 size = p->chunks[i].length_dw;
 179                 cdata = (void __user *)(unsigned long)user_chunk.chunk_data;
 180
 181                 p->chunks[i].kdata = drm_malloc_ab(size, sizeof(uint32_t));
 182                 if (p->chunks[i].kdata == NULL) {
 183                         ret = -ENOMEM;
 184                         i--;
 185                         goto free_partial_kdata;
 186                 }
 187                 size *= sizeof(uint32_t);
 188                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 189                         ret = -EFAULT;
 190                         goto free_partial_kdata;
 191                 }
 192
 193                 switch (p->chunks[i].chunk_id) {
 194                 case AMDGPU_CHUNK_ID_IB:
 195                         ++num_ibs;
 196                         break;
 197
 198                 case AMDGPU_CHUNK_ID_FENCE:
 199                         size = sizeof(struct drm_amdgpu_cs_chunk_fence);
 200                         if (p->chunks[i].length_dw * sizeof(uint32_t) < size) {
 201                                 ret = -EINVAL;
 202                                 goto free_partial_kdata;
 203                         }
 204
 205                         ret = amdgpu_cs_user_fence_chunk(p, p->chunks[i].kdata,
 206                                                          &uf_offset);
 207                         if (ret)
 208                                 goto free_partial_kdata;
 209
 210                         break;
 211
 212                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 213                         break;
 214
 215                 default:
 216                         ret = -EINVAL;
 217                         goto free_partial_kdata;
 218                 }
 219         }
 220
 221         ret = amdgpu_job_alloc(p->adev, num_ibs, &p->job, vm);
 222         if (ret)
 223                 goto free_all_kdata;
 224
 225         if (p->uf_entry.robj)
 226                 p->job->uf_addr = uf_offset;
 227         kfree(chunk_array);
 228         return 0;
 229
 230 free_all_kdata:
 231         i = p->nchunks - 1;
 232 free_partial_kdata:
 233         for (; i >= 0; i--)
 234                 drm_free_large(p->chunks[i].kdata);
 235         kfree(p->chunks);
 236 put_ctx:
 237         amdgpu_ctx_put(p->ctx);
 238 free_chunk:
 239         kfree(chunk_array);
 240
 241         return ret;
 242 }
 243
 244 /* Convert microseconds to bytes. */
 245 static u64 us_to_bytes(struct amdgpu_device *adev, s64 us)
 246 {
 247         if (us <= 0 || !adev->mm_stats.log2_max_MBps)
 248                 return 0;
 249
 250         /* Since accum_us is incremented by a million per second, just
 251          * multiply it by the number of MB/s to get the number of bytes.
 252          */
 253         return us << adev->mm_stats.log2_max_MBps;
 254 }
 255
 256 static s64 bytes_to_us(struct amdgpu_device *adev, u64 bytes)
 257 {
 258         if (!adev->mm_stats.log2_max_MBps)
 259                 return 0;
 260
 261         return bytes >> adev->mm_stats.log2_max_MBps;
 262 }
 263
 264 /* Returns how many bytes TTM can move right now. If no bytes can be moved,
 265  * it returns 0. If it returns non-zero, it's OK to move at least one buffer,
 266  * which means it can go over the threshold once. If that happens, the driver
 267  * will be in debt and no other buffer migrations can be done until that debt
 268  * is repaid.
 269  *
 270  * This approach allows moving a buffer of any size (it's important to allow
 271  * that).
 272  *
 273  * The currency is simply time in microseconds and it increases as the clock
 274  * ticks. The accumulated microseconds (us) are converted to bytes and
 275  * returned.
 276  */
 277 static u64 amdgpu_cs_get_threshold_for_moves(struct amdgpu_device *adev)
 278 {
 279         s64 time_us, increment_us;
 280         u64 max_bytes;
 281         u64 free_vram, total_vram, used_vram;
 282
 283         /* Allow a maximum of 200 accumulated ms. This is basically per-IB
 284          * throttling.
 285          *
 286          * It means that in order to get full max MBps, at least 5 IBs per
 287          * second must be submitted and not more than 200ms apart from each
 288          * other.
 289          */
 290         const s64 us_upper_bound = 200000;
 291
 292         if (!adev->mm_stats.log2_max_MBps)
 293                 return 0;
 294
 295         total_vram = adev->mc.real_vram_size - adev->vram_pin_size;
 296         used_vram = atomic64_read(&adev->vram_usage);
 297         free_vram = used_vram >= total_vram ? 0 : total_vram - used_vram;
 298
 299         spin_lock(&adev->mm_stats.lock);
 300
 301         /* Increase the amount of accumulated us. */
 302         time_us = ktime_to_us(ktime_get());
 303         increment_us = time_us - adev->mm_stats.last_update_us;
 304         adev->mm_stats.last_update_us = time_us;
 305         adev->mm_stats.accum_us = min(adev->mm_stats.accum_us + increment_us,
 306                                       us_upper_bound);
 307
 308         /* This prevents the short period of low performance when the VRAM
 309          * usage is low and the driver is in debt or doesn't have enough
 310          * accumulated us to fill VRAM quickly.
 311          *
 312          * The situation can occur in these cases:
 313          * - a lot of VRAM is freed by userspace
 314          * - the presence of a big buffer causes a lot of evictions
 315          *   (solution: split buffers into smaller ones)
 316          *
 317          * If 128 MB or 1/8th of VRAM is free, start filling it now by setting
 318          * accum_us to a positive number.
 319          */
 320         if (free_vram >= 128 * 1024 * 1024 || free_vram >= total_vram / 8) {
 321                 s64 min_us;
 322
 323                 /* Be more aggresive on dGPUs. Try to fill a portion of free
 324                  * VRAM now.
 325                  */
 326                 if (!(adev->flags & AMD_IS_APU))
 327                         min_us = bytes_to_us(adev, free_vram / 4);
 328                 else
 329                         min_us = 0; /* Reset accum_us on APUs. */
 330
 331                 adev->mm_stats.accum_us = max(min_us, adev->mm_stats.accum_us);
 332         }
 333
 334         /* This returns 0 if the driver is in debt to disallow (optional)
 335          * buffer moves.
 336          */
 337         max_bytes = us_to_bytes(adev, adev->mm_stats.accum_us);
 338
 339         spin_unlock(&adev->mm_stats.lock);
 340         return max_bytes;
 341 }
 342
 343 /* Report how many bytes have really been moved for the last command
 344  * submission. This can result in a debt that can stop buffer migrations
 345  * temporarily.
 346  */
 347 static void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev,
 348                                          u64 num_bytes)
 349 {
 350         spin_lock(&adev->mm_stats.lock);
 351         adev->mm_stats.accum_us -= bytes_to_us(adev, num_bytes);
 352         spin_unlock(&adev->mm_stats.lock);
 353 }
 354
 355 static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
 356                                  struct amdgpu_bo *bo)
 357 {
 358         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 359         u64 initial_bytes_moved;
 360         uint32_t domain;
 361         int r;
 362
 363         if (bo->pin_count)
 364                 return 0;
 365
 366         /* Don't move this buffer if we have depleted our allowance
 367          * to move it. Don't move anything if the threshold is zero.
 368          */
 369         if (p->bytes_moved < p->bytes_moved_threshold)
 370                 domain = bo->prefered_domains;
 371         else
 372                 domain = bo->allowed_domains;
 373
 374 retry:
 375         amdgpu_ttm_placement_from_domain(bo, domain);
 376         initial_bytes_moved = atomic64_read(&adev->num_bytes_moved);
 377         r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 378         p->bytes_moved += atomic64_read(&adev->num_bytes_moved) -
 379                 initial_bytes_moved;
 380
 381         if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 382                 domain = bo->allowed_domains;
 383                 goto retry;
 384         }
 385
 386         return r;
 387 }
 388
 389 /* Last resort, try to evict something from the current working set */
 390 static bool amdgpu_cs_try_evict(struct amdgpu_cs_parser *p,
 391                                 struct amdgpu_bo *validated)
 392 {
 393         uint32_t domain = validated->allowed_domains;
 394         int r;
 395
 396         if (!p->evictable)
 397                 return false;
 398
 399         for (;&p->evictable->tv.head != &p->validated;
 400              p->evictable = list_prev_entry(p->evictable, tv.head)) {
 401
 402                 struct amdgpu_bo_list_entry *candidate = p->evictable;
 403                 struct amdgpu_bo *bo = candidate->robj;
 404                 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 405                 u64 initial_bytes_moved;
 406                 uint32_t other;
 407
 408                 /* If we reached our current BO we can forget it */
 409                 if (candidate->robj == validated)
 410                         break;
 411
 412                 other = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
 413
 414                 /* Check if this BO is in one of the domains we need space for */
 415                 if (!(other & domain))
 416                         continue;
 417
 418                 /* Check if we can move this BO somewhere else */
 419                 other = bo->allowed_domains & ~domain;
 420                 if (!other)
 421                         continue;
 422
 423                 /* Good we can try to move this BO somewhere else */
 424                 amdgpu_ttm_placement_from_domain(bo, other);
 425                 initial_bytes_moved = atomic64_read(&adev->num_bytes_moved);
 426                 r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 427                 p->bytes_moved += atomic64_read(&adev->num_bytes_moved) -
 428                         initial_bytes_moved;
 429
 430                 if (unlikely(r))
 431                         break;
 432
 433                 p->evictable = list_prev_entry(p->evictable, tv.head);
 434                 list_move(&candidate->tv.head, &p->validated);
 435
 436                 return true;
 437         }
 438
 439         return false;
 440 }
 441
 442 static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo)
 443 {
 444         struct amdgpu_cs_parser *p = param;
 445         int r;
 446
 447         do {
 448                 r = amdgpu_cs_bo_validate(p, bo);
 449         } while (r == -ENOMEM && amdgpu_cs_try_evict(p, bo));
 450         if (r)
 451                 return r;
 452
 453         if (bo->shadow)
 454                 r = amdgpu_cs_bo_validate(p, bo);
 455
 456         return r;
 457 }
 458
 459 static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 460                             struct list_head *validated)
 461 {
 462         struct amdgpu_bo_list_entry *lobj;
 463         int r;
 464
 465         list_for_each_entry(lobj, validated, tv.head) {
 466                 struct amdgpu_bo *bo = lobj->robj;
 467                 bool binding_userptr = false;
 468                 struct mm_struct *usermm;
 469
 470                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 471                 if (usermm && usermm != current->mm)
 472                         return -EPERM;
 473
 474                 /* Check if we have user pages and nobody bound the BO already */
 475                 if (lobj->user_pages && bo->tbo.ttm->state != tt_bound) {
 476                         size_t size = sizeof(struct page *);
 477
 478                         size *= bo->tbo.ttm->num_pages;
 479                         memcpy(bo->tbo.ttm->pages, lobj->user_pages, size);
 480                         binding_userptr = true;
 481                 }
 482
 483                 if (p->evictable == lobj)
 484                         p->evictable = NULL;
 485
 486                 r = amdgpu_cs_validate(p, bo);
 487                 if (r)
 488                         return r;
 489
 490                 if (binding_userptr) {
 491                         drm_free_large(lobj->user_pages);
 492                         lobj->user_pages = NULL;
 493                 }
 494         }
 495         return 0;
 496 }
 497
 498 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 499                                 union drm_amdgpu_cs *cs)
 500 {
 501         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 502         struct amdgpu_bo_list_entry *e;
 503         struct list_head duplicates;
 504         bool need_mmap_lock = false;
 505         unsigned i, tries = 10;
 506         int r;
 507
 508         INIT_LIST_HEAD(&p->validated);
 509
 510         p->bo_list = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle);
 511         if (p->bo_list) {
 512                 need_mmap_lock = p->bo_list->first_userptr !=
 513                         p->bo_list->num_entries;
 514                 amdgpu_bo_list_get_list(p->bo_list, &p->validated);
 515         }
 516
 517         INIT_LIST_HEAD(&duplicates);
 518         amdgpu_vm_get_pd_bo(&fpriv->vm, &p->validated, &p->vm_pd);
 519
 520         if (p->uf_entry.robj)
 521                 list_add(&p->uf_entry.tv.head, &p->validated);
 522
 523         if (need_mmap_lock)
 524                 down_read(&current->mm->mmap_sem);
 525
 526         while (1) {
 527                 struct list_head need_pages;
 528                 unsigned i;
 529
 530                 r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true,
 531                                            &duplicates);
 532                 if (unlikely(r != 0)) {
 533                         if (r != -ERESTARTSYS)
 534                                 DRM_ERROR("ttm_eu_reserve_buffers failed.\n");
 535                         goto error_free_pages;
 536                 }
 537
 538                 /* Without a BO list we don't have userptr BOs */
 539                 if (!p->bo_list)
 540                         break;
 541
 542                 INIT_LIST_HEAD(&need_pages);
 543                 for (i = p->bo_list->first_userptr;
 544                      i < p->bo_list->num_entries; ++i) {
 545
 546                         e = &p->bo_list->array[i];
 547
 548                         if (amdgpu_ttm_tt_userptr_invalidated(e->robj->tbo.ttm,
 549                                  &e->user_invalidated) && e->user_pages) {
 550
 551                                 /* We acquired a page array, but somebody
 552                                  * invalidated it. Free it an try again
 553                                  */
 554                                 release_pages(e->user_pages,
 555                                               e->robj->tbo.ttm->num_pages,
 556                                               false);
 557                                 drm_free_large(e->user_pages);
 558                                 e->user_pages = NULL;
 559                         }
 560
 561                         if (e->robj->tbo.ttm->state != tt_bound &&
 562                             !e->user_pages) {
 563                                 list_del(&e->tv.head);
 564                                 list_add(&e->tv.head, &need_pages);
 565
 566                                 amdgpu_bo_unreserve(e->robj);
 567                         }
 568                 }
 569
 570                 if (list_empty(&need_pages))
 571                         break;
 572
 573                 /* Unreserve everything again. */
 574                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 575
 576                 /* We tried too many times, just abort */
 577                 if (!--tries) {
 578                         r = -EDEADLK;
 579                         DRM_ERROR("deadlock in %s\n", __func__);
 580                         goto error_free_pages;
 581                 }
 582
 583                 /* Fill the page arrays for all useptrs. */
 584                 list_for_each_entry(e, &need_pages, tv.head) {
 585                         struct ttm_tt *ttm = e->robj->tbo.ttm;
 586
 587                         e->user_pages = drm_calloc_large(ttm->num_pages,
 588                                                          sizeof(struct page*));
 589                         if (!e->user_pages) {
 590                                 r = -ENOMEM;
 591                                 DRM_ERROR("calloc failure in %s\n", __func__);
 592                                 goto error_free_pages;
 593                         }
 594
 595                         r = amdgpu_ttm_tt_get_user_pages(ttm, e->user_pages);
 596                         if (r) {
 597                                 DRM_ERROR("amdgpu_ttm_tt_get_user_pages failed.\n");
 598                                 drm_free_large(e->user_pages);
 599                                 e->user_pages = NULL;
 600                                 goto error_free_pages;
 601                         }
 602                 }
 603
 604                 /* And try again. */
 605                 list_splice(&need_pages, &p->validated);
 606         }
 607
 608         p->bytes_moved_threshold = amdgpu_cs_get_threshold_for_moves(p->adev);
 609         p->bytes_moved = 0;
 610         p->evictable = list_last_entry(&p->validated,
 611                                        struct amdgpu_bo_list_entry,
 612                                        tv.head);
 613
 614         r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
 615                                       amdgpu_cs_validate, p);
 616         if (r) {
 617                 DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
 618                 goto error_validate;
 619         }
 620
 621         r = amdgpu_cs_list_validate(p, &duplicates);
 622         if (r) {
 623                 DRM_ERROR("amdgpu_cs_list_validate(duplicates) failed.\n");
 624                 goto error_validate;
 625         }
 626
 627         r = amdgpu_cs_list_validate(p, &p->validated);
 628         if (r) {
 629                 DRM_ERROR("amdgpu_cs_list_validate(validated) failed.\n");
 630                 goto error_validate;
 631         }
 632
 633         amdgpu_cs_report_moved_bytes(p->adev, p->bytes_moved);
 634
 635         fpriv->vm.last_eviction_counter =
 636                 atomic64_read(&p->adev->num_evictions);
 637
 638         if (p->bo_list) {
 639                 struct amdgpu_bo *gds = p->bo_list->gds_obj;
 640                 struct amdgpu_bo *gws = p->bo_list->gws_obj;
 641                 struct amdgpu_bo *oa = p->bo_list->oa_obj;
 642                 struct amdgpu_vm *vm = &fpriv->vm;
 643                 unsigned i;
 644
 645                 for (i = 0; i < p->bo_list->num_entries; i++) {
 646                         struct amdgpu_bo *bo = p->bo_list->array[i].robj;
 647
 648                         p->bo_list->array[i].bo_va = amdgpu_vm_bo_find(vm, bo);
 649                 }
 650
 651                 if (gds) {
 652                         p->job->gds_base = amdgpu_bo_gpu_offset(gds);
 653                         p->job->gds_size = amdgpu_bo_size(gds);
 654                 }
 655                 if (gws) {
 656                         p->job->gws_base = amdgpu_bo_gpu_offset(gws);
 657                         p->job->gws_size = amdgpu_bo_size(gws);
 658                 }
 659                 if (oa) {
 660                         p->job->oa_base = amdgpu_bo_gpu_offset(oa);
 661                         p->job->oa_size = amdgpu_bo_size(oa);
 662                 }
 663         }
 664
 665         if (!r && p->uf_entry.robj) {
 666                 struct amdgpu_bo *uf = p->uf_entry.robj;
 667
 668                 r = amdgpu_ttm_bind(&uf->tbo, &uf->tbo.mem);
 669                 p->job->uf_addr += amdgpu_bo_gpu_offset(uf);
 670         }
 671
 672 error_validate:
 673         if (r) {
 674                 amdgpu_vm_move_pt_bos_in_lru(p->adev, &fpriv->vm);
 675                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 676         }
 677
 678 error_free_pages:
 679
 680         if (need_mmap_lock)
 681                 up_read(&current->mm->mmap_sem);
 682
 683         if (p->bo_list) {
 684                 for (i = p->bo_list->first_userptr;
 685                      i < p->bo_list->num_entries; ++i) {
 686                         e = &p->bo_list->array[i];
 687
 688                         if (!e->user_pages)
 689                                 continue;
 690
 691                         release_pages(e->user_pages,
 692                                       e->robj->tbo.ttm->num_pages,
 693                                       false);
 694                         drm_free_large(e->user_pages);
 695                 }
 696         }
 697
 698         return r;
 699 }
 700
 701 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 702 {
 703         struct amdgpu_bo_list_entry *e;
 704         int r;
 705
 706         list_for_each_entry(e, &p->validated, tv.head) {
 707                 struct reservation_object *resv = e->robj->tbo.resv;
 708                 r = amdgpu_sync_resv(p->adev, &p->job->sync, resv, p->filp);
 709
 710                 if (r)
 711                         return r;
 712         }
 713         return 0;
 714 }
 715
 716 /**
 717  * cs_parser_fini() - clean parser states
 718  * @parser:     parser structure holding parsing context.
 719  * @error:      error number
 720  *
 721  * If error is set than unvalidate buffer, otherwise just free memory
 722  * used by parsing context.
 723  **/
 724 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error, bool backoff)
 725 {
 726         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
 727         unsigned i;
 728
 729         if (!error) {
 730                 amdgpu_vm_move_pt_bos_in_lru(parser->adev, &fpriv->vm);
 731
 732                 ttm_eu_fence_buffer_objects(&parser->ticket,
 733                                             &parser->validated,
 734                                             parser->fence);
 735         } else if (backoff) {
 736                 ttm_eu_backoff_reservation(&parser->ticket,
 737                                            &parser->validated);
 738         }
 739         dma_fence_put(parser->fence);
 740
 741         if (parser->ctx)
 742                 amdgpu_ctx_put(parser->ctx);
 743         if (parser->bo_list)
 744                 amdgpu_bo_list_put(parser->bo_list);
 745
 746         for (i = 0; i < parser->nchunks; i++)
 747                 drm_free_large(parser->chunks[i].kdata);
 748         kfree(parser->chunks);
 749         if (parser->job)
 750                 amdgpu_job_free(parser->job);
 751         amdgpu_bo_unref(&parser->uf_entry.robj);
 752 }
 753
 754 static int amdgpu_bo_vm_update_pte(struct amdgpu_cs_parser *p,
 755                                    struct amdgpu_vm *vm)
 756 {
 757         struct amdgpu_device *adev = p->adev;
 758         struct amdgpu_bo_va *bo_va;
 759         struct amdgpu_bo *bo;
 760         int i, r;
 761
 762         r = amdgpu_vm_update_page_directory(adev, vm);
 763         if (r)
 764                 return r;
 765
 766         r = amdgpu_sync_fence(adev, &p->job->sync, vm->page_directory_fence);
 767         if (r)
 768                 return r;
 769
 770         r = amdgpu_vm_clear_freed(adev, vm);
 771         if (r)
 772                 return r;
 773
 774         if (p->bo_list) {
 775                 for (i = 0; i < p->bo_list->num_entries; i++) {
 776                         struct dma_fence *f;
 777
 778                         /* ignore duplicates */
 779                         bo = p->bo_list->array[i].robj;
 780                         if (!bo)
 781                                 continue;
 782
 783                         bo_va = p->bo_list->array[i].bo_va;
 784                         if (bo_va == NULL)
 785                                 continue;
 786
 787                         r = amdgpu_vm_bo_update(adev, bo_va, false);
 788                         if (r)
 789                                 return r;
 790
 791                         f = bo_va->last_pt_update;
 792                         r = amdgpu_sync_fence(adev, &p->job->sync, f);
 793                         if (r)
 794                                 return r;
 795                 }
 796
 797         }
 798
 799         r = amdgpu_vm_clear_invalids(adev, vm, &p->job->sync);
 800
 801         if (amdgpu_vm_debug && p->bo_list) {
 802                 /* Invalidate all BOs to test for userspace bugs */
 803                 for (i = 0; i < p->bo_list->num_entries; i++) {
 804                         /* ignore duplicates */
 805                         bo = p->bo_list->array[i].robj;
 806                         if (!bo)
 807                                 continue;
 808
 809                         amdgpu_vm_bo_invalidate(adev, bo);
 810                 }
 811         }
 812
 813         return r;
 814 }
 815
 816 static int amdgpu_cs_ib_vm_chunk(struct amdgpu_device *adev,
 817                                  struct amdgpu_cs_parser *p)
 818 {
 819         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 820         struct amdgpu_vm *vm = &fpriv->vm;
 821         struct amdgpu_ring *ring = p->job->ring;
 822         int i, r;
 823
 824         /* Only for UVD/VCE VM emulation */
 825         if (ring->funcs->parse_cs) {
 826                 for (i = 0; i < p->job->num_ibs; i++) {
 827                         r = amdgpu_ring_parse_cs(ring, p, i);
 828                         if (r)
 829                                 return r;
 830                 }
 831         }
 832
 833         if (p->job->vm) {
 834                 p->job->vm_pd_addr = amdgpu_bo_gpu_offset(vm->page_directory);
 835
 836                 r = amdgpu_bo_vm_update_pte(p, vm);
 837                 if (r)
 838                         return r;
 839         }
 840
 841         return amdgpu_cs_sync_rings(p);
 842 }
 843
 844 static int amdgpu_cs_ib_fill(struct amdgpu_device *adev,
 845                              struct amdgpu_cs_parser *parser)
 846 {
 847         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
 848         struct amdgpu_vm *vm = &fpriv->vm;
 849         int i, j;
 850         int r;
 851
 852         for (i = 0, j = 0; i < parser->nchunks && j < parser->job->num_ibs; i++) {
 853                 struct amdgpu_cs_chunk *chunk;
 854                 struct amdgpu_ib *ib;
 855                 struct drm_amdgpu_cs_chunk_ib *chunk_ib;
 856                 struct amdgpu_ring *ring;
 857
 858                 chunk = &parser->chunks[i];
 859                 ib = &parser->job->ibs[j];
 860                 chunk_ib = (struct drm_amdgpu_cs_chunk_ib *)chunk->kdata;
 861
 862                 if (chunk->chunk_id != AMDGPU_CHUNK_ID_IB)
 863                         continue;
 864
 865                 r = amdgpu_cs_get_ring(adev, chunk_ib->ip_type,
 866                                        chunk_ib->ip_instance, chunk_ib->ring,
 867                                        &ring);
 868                 if (r)
 869                         return r;
 870
 871                 if (ib->flags & AMDGPU_IB_FLAG_PREAMBLE) {
 872                         parser->job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT;
 873                         if (!parser->ctx->preamble_presented) {
 874                                 parser->job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT_FIRST;
 875                                 parser->ctx->preamble_presented = true;
 876                         }
 877                 }
 878
 879                 if (parser->job->ring && parser->job->ring != ring)
 880                         return -EINVAL;
 881
 882                 parser->job->ring = ring;
 883
 884                 if (ring->funcs->parse_cs) {
 885                         struct amdgpu_bo_va_mapping *m;
 886                         struct amdgpu_bo *aobj = NULL;
 887                         uint64_t offset;
 888                         uint8_t *kptr;
 889
 890                         m = amdgpu_cs_find_mapping(parser, chunk_ib->va_start,
 891                                                    &aobj);
 892                         if (!aobj) {
 893                                 DRM_ERROR("IB va_start is invalid\n");
 894                                 return -EINVAL;
 895                         }
 896
 897                         if ((chunk_ib->va_start + chunk_ib->ib_bytes) >
 898                             (m->it.last + 1) * AMDGPU_GPU_PAGE_SIZE) {
 899                                 DRM_ERROR("IB va_start+ib_bytes is invalid\n");
 900                                 return -EINVAL;
 901                         }
 902
 903                         /* the IB should be reserved at this point */
 904                         r = amdgpu_bo_kmap(aobj, (void **)&kptr);
 905                         if (r) {
 906                                 return r;
 907                         }
 908
 909                         offset = ((uint64_t)m->it.start) * AMDGPU_GPU_PAGE_SIZE;
 910                         kptr += chunk_ib->va_start - offset;
 911
 912                         r =  amdgpu_ib_get(adev, vm, chunk_ib->ib_bytes, ib);
 913                         if (r) {
 914                                 DRM_ERROR("Failed to get ib !\n");
 915                                 return r;
 916                         }
 917
 918                         memcpy(ib->ptr, kptr, chunk_ib->ib_bytes);
 919                         amdgpu_bo_kunmap(aobj);
 920                 } else {
 921                         r =  amdgpu_ib_get(adev, vm, 0, ib);
 922                         if (r) {
 923                                 DRM_ERROR("Failed to get ib !\n");
 924                                 return r;
 925                         }
 926
 927                 }
 928
 929                 ib->gpu_addr = chunk_ib->va_start;
 930                 ib->length_dw = chunk_ib->ib_bytes / 4;
 931                 ib->flags = chunk_ib->flags;
 932                 j++;
 933         }
 934
 935         /* UVD & VCE fw doesn't support user fences */
 936         if (parser->job->uf_addr && (
 937             parser->job->ring->funcs->type == AMDGPU_RING_TYPE_UVD ||
 938             parser->job->ring->funcs->type == AMDGPU_RING_TYPE_VCE))
 939                 return -EINVAL;
 940
 941         return 0;
 942 }
 943
 944 static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
 945                                   struct amdgpu_cs_parser *p)
 946 {
 947         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 948         int i, j, r;
 949
 950         for (i = 0; i < p->nchunks; ++i) {
 951                 struct drm_amdgpu_cs_chunk_dep *deps;
 952                 struct amdgpu_cs_chunk *chunk;
 953                 unsigned num_deps;
 954
 955                 chunk = &p->chunks[i];
 956
 957                 if (chunk->chunk_id != AMDGPU_CHUNK_ID_DEPENDENCIES)
 958                         continue;
 959
 960                 deps = (struct drm_amdgpu_cs_chunk_dep *)chunk->kdata;
 961                 num_deps = chunk->length_dw * 4 /
 962                         sizeof(struct drm_amdgpu_cs_chunk_dep);
 963
 964                 for (j = 0; j < num_deps; ++j) {
 965                         struct amdgpu_ring *ring;
 966                         struct amdgpu_ctx *ctx;
 967                         struct dma_fence *fence;
 968
 969                         r = amdgpu_cs_get_ring(adev, deps[j].ip_type,
 970                                                deps[j].ip_instance,
 971                                                deps[j].ring, &ring);
 972                         if (r)
 973                                 return r;
 974
 975                         ctx = amdgpu_ctx_get(fpriv, deps[j].ctx_id);
 976                         if (ctx == NULL)
 977                                 return -EINVAL;
 978
 979                         fence = amdgpu_ctx_get_fence(ctx, ring,
 980                                                      deps[j].handle);
 981                         if (IS_ERR(fence)) {
 982                                 r = PTR_ERR(fence);
 983                                 amdgpu_ctx_put(ctx);
 984                                 return r;
 985
 986                         } else if (fence) {
 987                                 r = amdgpu_sync_fence(adev, &p->job->sync,
 988                                                       fence);
 989                                 dma_fence_put(fence);
 990                                 amdgpu_ctx_put(ctx);
 991                                 if (r)
 992                                         return r;
 993                         }
 994                 }
 995         }
 996
 997         return 0;
 998 }
 999
1000 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
1001                             union drm_amdgpu_cs *cs)
1002 {
1003         struct amdgpu_ring *ring = p->job->ring;
1004         struct amd_sched_entity *entity = &p->ctx->rings[ring->idx].entity;
1005         struct amdgpu_job *job;
1006         int r;
1007
1008         job = p->job;
1009         p->job = NULL;
1010
1011         r = amd_sched_job_init(&job->base, &ring->sched, entity, p->filp);
1012         if (r) {
1013                 amdgpu_job_free(job);
1014                 return r;
1015         }
1016
1017         job->owner = p->filp;
1018         job->fence_ctx = entity->fence_context;
1019         p->fence = dma_fence_get(&job->base.s_fence->finished);
1020         cs->out.handle = amdgpu_ctx_add_fence(p->ctx, ring, p->fence);
1021         job->uf_sequence = cs->out.handle;
1022         amdgpu_job_free_resources(job);
1023
1024         trace_amdgpu_cs_ioctl(job);
1025         amd_sched_entity_push_job(&job->base);
1026
1027         return 0;
1028 }
1029
1030 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
1031 {
1032         struct amdgpu_device *adev = dev->dev_private;
1033         union drm_amdgpu_cs *cs = data;
1034         struct amdgpu_cs_parser parser = {};
1035         bool reserved_buffers = false;
1036         int i, r;
1037
1038         if (!adev->accel_working)
1039                 return -EBUSY;
1040
1041         parser.adev = adev;
1042         parser.filp = filp;
1043
1044         r = amdgpu_cs_parser_init(&parser, data);
1045         if (r) {
1046                 DRM_ERROR("Failed to initialize parser !\n");
1047                 goto out;
1048         }
1049
1050         r = amdgpu_cs_parser_bos(&parser, data);
1051         if (r) {
1052                 if (r == -ENOMEM)
1053                         DRM_ERROR("Not enough memory for command submission!\n");
1054                 else if (r != -ERESTARTSYS)
1055                         DRM_ERROR("Failed to process the buffer list %d!\n", r);
1056                 goto out;
1057         }
1058
1059         reserved_buffers = true;
1060         r = amdgpu_cs_ib_fill(adev, &parser);
1061         if (r)
1062                 goto out;
1063
1064         r = amdgpu_cs_dependencies(adev, &parser);
1065         if (r) {
1066                 DRM_ERROR("Failed in the dependencies handling %d!\n", r);
1067                 goto out;
1068         }
1069
1070         for (i = 0; i < parser.job->num_ibs; i++)
1071                 trace_amdgpu_cs(&parser, i);
1072
1073         r = amdgpu_cs_ib_vm_chunk(adev, &parser);
1074         if (r)
1075                 goto out;
1076
1077         r = amdgpu_cs_submit(&parser, cs);
1078
1079 out:
1080         amdgpu_cs_parser_fini(&parser, r, reserved_buffers);
1081         return r;
1082 }
1083
1084 /**
1085  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
1086  *
1087  * @dev: drm device
1088  * @data: data from userspace
1089  * @filp: file private
1090  *
1091  * Wait for the command submission identified by handle to finish.
1092  */
1093 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
1094                          struct drm_file *filp)
1095 {
1096         union drm_amdgpu_wait_cs *wait = data;
1097         struct amdgpu_device *adev = dev->dev_private;
1098         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
1099         struct amdgpu_ring *ring = NULL;
1100         struct amdgpu_ctx *ctx;
1101         struct dma_fence *fence;
1102         long r;
1103
1104         r = amdgpu_cs_get_ring(adev, wait->in.ip_type, wait->in.ip_instance,
1105                                wait->in.ring, &ring);
1106         if (r)
1107                 return r;
1108
1109         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
1110         if (ctx == NULL)
1111                 return -EINVAL;
1112
1113         fence = amdgpu_ctx_get_fence(ctx, ring, wait->in.handle);
1114         if (IS_ERR(fence))
1115                 r = PTR_ERR(fence);
1116         else if (fence) {
1117                 r = dma_fence_wait_timeout(fence, true, timeout);
1118                 dma_fence_put(fence);
1119         } else
1120                 r = 1;
1121
1122         amdgpu_ctx_put(ctx);
1123         if (r < 0)
1124                 return r;
1125
1126         memset(wait, 0, sizeof(*wait));
1127         wait->out.status = (r == 0);
1128
1129         return 0;
1130 }
1131
1132 /**
1133  * amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
1134  *
1135  * @adev: amdgpu device
1136  * @filp: file private
1137  * @user: drm_amdgpu_fence copied from user space
1138  */
1139 static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
1140                                              struct drm_file *filp,
1141                                              struct drm_amdgpu_fence *user)
1142 {
1143         struct amdgpu_ring *ring;
1144         struct amdgpu_ctx *ctx;
1145         struct dma_fence *fence;
1146         int r;
1147
1148         r = amdgpu_cs_get_ring(adev, user->ip_type, user->ip_instance,
1149                                user->ring, &ring);
1150         if (r)
1151                 return ERR_PTR(r);
1152
1153         ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
1154         if (ctx == NULL)
1155                 return ERR_PTR(-EINVAL);
1156
1157         fence = amdgpu_ctx_get_fence(ctx, ring, user->seq_no);
1158         amdgpu_ctx_put(ctx);
1159
1160         return fence;
1161 }
1162
1163 /**
1164  * amdgpu_cs_wait_all_fence - wait on all fences to signal
1165  *
1166  * @adev: amdgpu device
1167  * @filp: file private
1168  * @wait: wait parameters
1169  * @fences: array of drm_amdgpu_fence
1170  */
1171 static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
1172                                      struct drm_file *filp,
1173                                      union drm_amdgpu_wait_fences *wait,
1174                                      struct drm_amdgpu_fence *fences)
1175 {
1176         uint32_t fence_count = wait->in.fence_count;
1177         unsigned int i;
1178         long r = 1;
1179
1180         for (i = 0; i < fence_count; i++) {
1181                 struct dma_fence *fence;
1182                 unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1183
1184                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1185                 if (IS_ERR(fence))
1186                         return PTR_ERR(fence);
1187                 else if (!fence)
1188                         continue;
1189
1190                 r = dma_fence_wait_timeout(fence, true, timeout);
1191                 if (r < 0)
1192                         return r;
1193
1194                 if (r == 0)
1195                         break;
1196         }
1197
1198         memset(wait, 0, sizeof(*wait));
1199         wait->out.status = (r > 0);
1200
1201         return 0;
1202 }
1203
1204 /**
1205  * amdgpu_cs_wait_any_fence - wait on any fence to signal
1206  *
1207  * @adev: amdgpu device
1208  * @filp: file private
1209  * @wait: wait parameters
1210  * @fences: array of drm_amdgpu_fence
1211  */
1212 static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
1213                                     struct drm_file *filp,
1214                                     union drm_amdgpu_wait_fences *wait,
1215                                     struct drm_amdgpu_fence *fences)
1216 {
1217         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1218         uint32_t fence_count = wait->in.fence_count;
1219         uint32_t first = ~0;
1220         struct dma_fence **array;
1221         unsigned int i;
1222         long r;
1223
1224         /* Prepare the fence array */
1225         array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
1226
1227         if (array == NULL)
1228                 return -ENOMEM;
1229
1230         for (i = 0; i < fence_count; i++) {
1231                 struct dma_fence *fence;
1232
1233                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1234                 if (IS_ERR(fence)) {
1235                         r = PTR_ERR(fence);
1236                         goto err_free_fence_array;
1237                 } else if (fence) {
1238                         array[i] = fence;
1239                 } else { /* NULL, the fence has been already signaled */
1240                         r = 1;
1241                         goto out;
1242                 }
1243         }
1244
1245         r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
1246                                        &first);
1247         if (r < 0)
1248                 goto err_free_fence_array;
1249
1250 out:
1251         memset(wait, 0, sizeof(*wait));
1252         wait->out.status = (r > 0);
1253         wait->out.first_signaled = first;
1254         /* set return value 0 to indicate success */
1255         r = 0;
1256
1257 err_free_fence_array:
1258         for (i = 0; i < fence_count; i++)
1259                 dma_fence_put(array[i]);
1260         kfree(array);
1261
1262         return r;
1263 }
1264
1265 /**
1266  * amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
1267  *
1268  * @dev: drm device
1269  * @data: data from userspace
1270  * @filp: file private
1271  */
1272 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
1273                                 struct drm_file *filp)
1274 {
1275         struct amdgpu_device *adev = dev->dev_private;
1276         union drm_amdgpu_wait_fences *wait = data;
1277         uint32_t fence_count = wait->in.fence_count;
1278         struct drm_amdgpu_fence *fences_user;
1279         struct drm_amdgpu_fence *fences;
1280         int r;
1281
1282         /* Get the fences from userspace */
1283         fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
1284                         GFP_KERNEL);
1285         if (fences == NULL)
1286                 return -ENOMEM;
1287
1288         fences_user = (void __user *)(unsigned long)(wait->in.fences);
1289         if (copy_from_user(fences, fences_user,
1290                 sizeof(struct drm_amdgpu_fence) * fence_count)) {
1291                 r = -EFAULT;
1292                 goto err_free_fences;
1293         }
1294
1295         if (wait->in.wait_all)
1296                 r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
1297         else
1298                 r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
1299
1300 err_free_fences:
1301         kfree(fences);
1302
1303         return r;
1304 }
1305
1306 /**
1307  * amdgpu_cs_find_bo_va - find bo_va for VM address
1308  *
1309  * @parser: command submission parser context
1310  * @addr: VM address
1311  * @bo: resulting BO of the mapping found
1312  *
1313  * Search the buffer objects in the command submission context for a certain
1314  * virtual memory address. Returns allocation structure when found, NULL
1315  * otherwise.
1316  */
1317 struct amdgpu_bo_va_mapping *
1318 amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1319                        uint64_t addr, struct amdgpu_bo **bo)
1320 {
1321         struct amdgpu_bo_va_mapping *mapping;
1322         unsigned i;
1323
1324         if (!parser->bo_list)
1325                 return NULL;
1326
1327         addr /= AMDGPU_GPU_PAGE_SIZE;
1328
1329         for (i = 0; i < parser->bo_list->num_entries; i++) {
1330                 struct amdgpu_bo_list_entry *lobj;
1331
1332                 lobj = &parser->bo_list->array[i];
1333                 if (!lobj->bo_va)
1334                         continue;
1335
1336                 list_for_each_entry(mapping, &lobj->bo_va->valids, list) {
1337                         if (mapping->it.start > addr ||
1338                             addr > mapping->it.last)
1339                                 continue;
1340
1341                         *bo = lobj->bo_va->bo;
1342                         return mapping;
1343                 }
1344
1345                 list_for_each_entry(mapping, &lobj->bo_va->invalids, list) {
1346                         if (mapping->it.start > addr ||
1347                             addr > mapping->it.last)
1348                                 continue;
1349
1350                         *bo = lobj->bo_va->bo;
1351                         return mapping;
1352                 }
1353         }
1354
1355         return NULL;
1356 }
1357
1358 /**
1359  * amdgpu_cs_sysvm_access_required - make BOs accessible by the system VM
1360  *
1361  * @parser: command submission parser context
1362  *
1363  * Helper for UVD/VCE VM emulation, make sure BOs are accessible by the system VM.
1364  */
1365 int amdgpu_cs_sysvm_access_required(struct amdgpu_cs_parser *parser)
1366 {
1367         unsigned i;
1368         int r;
1369
1370         if (!parser->bo_list)
1371                 return 0;
1372
1373         for (i = 0; i < parser->bo_list->num_entries; i++) {
1374                 struct amdgpu_bo *bo = parser->bo_list->array[i].robj;
1375
1376                 r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
1377                 if (unlikely(r))
1378                         return r;
1379
1380                 if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
1381                         continue;
1382
1383                 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1384                 amdgpu_ttm_placement_from_domain(bo, bo->allowed_domains);
1385                 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
1386                 if (unlikely(r))
1387                         return r;
1388         }
1389
1390         return 0;
1391 }