kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

   1 /*
   2  * Copyright 2009 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
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Jerome Glisse <glisse@freedesktop.org>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32 #include <linux/list.h>
  33 #include <linux/slab.h>
  34 #include <drm/drmP.h>
  35 #include <drm/amdgpu_drm.h>
  36 #include <drm/drm_cache.h>
  37 #include "amdgpu.h"
  38 #include "amdgpu_trace.h"
  39
  40
  41 int amdgpu_ttm_init(struct amdgpu_device *adev);
  42 void amdgpu_ttm_fini(struct amdgpu_device *adev);
  43
  44 static u64 amdgpu_get_vis_part_size(struct amdgpu_device *adev,
  45                                                 struct ttm_mem_reg *mem)
  46 {
  47         u64 ret = 0;
  48         if (mem->start << PAGE_SHIFT < adev->mc.visible_vram_size) {
  49                 ret = (u64)((mem->start << PAGE_SHIFT) + mem->size) >
  50                            adev->mc.visible_vram_size ?
  51                            adev->mc.visible_vram_size - (mem->start << PAGE_SHIFT) :
  52                            mem->size;
  53         }
  54         return ret;
  55 }
  56
  57 static void amdgpu_update_memory_usage(struct amdgpu_device *adev,
  58                        struct ttm_mem_reg *old_mem,
  59                        struct ttm_mem_reg *new_mem)
  60 {
  61         u64 vis_size;
  62         if (!adev)
  63                 return;
  64
  65         if (new_mem) {
  66                 switch (new_mem->mem_type) {
  67                 case TTM_PL_TT:
  68                         atomic64_add(new_mem->size, &adev->gtt_usage);
  69                         break;
  70                 case TTM_PL_VRAM:
  71                         atomic64_add(new_mem->size, &adev->vram_usage);
  72                         vis_size = amdgpu_get_vis_part_size(adev, new_mem);
  73                         atomic64_add(vis_size, &adev->vram_vis_usage);
  74                         break;
  75                 }
  76         }
  77
  78         if (old_mem) {
  79                 switch (old_mem->mem_type) {
  80                 case TTM_PL_TT:
  81                         atomic64_sub(old_mem->size, &adev->gtt_usage);
  82                         break;
  83                 case TTM_PL_VRAM:
  84                         atomic64_sub(old_mem->size, &adev->vram_usage);
  85                         vis_size = amdgpu_get_vis_part_size(adev, old_mem);
  86                         atomic64_sub(vis_size, &adev->vram_vis_usage);
  87                         break;
  88                 }
  89         }
  90 }
  91
  92 static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  93 {
  94         struct amdgpu_bo *bo;
  95
  96         bo = container_of(tbo, struct amdgpu_bo, tbo);
  97
  98         amdgpu_update_memory_usage(bo->adev, &bo->tbo.mem, NULL);
  99
 100         mutex_lock(&bo->adev->gem.mutex);
 101         list_del_init(&bo->list);
 102         mutex_unlock(&bo->adev->gem.mutex);
 103         drm_gem_object_release(&bo->gem_base);
 104         amdgpu_bo_unref(&bo->parent);
 105         kfree(bo->metadata);
 106         kfree(bo);
 107 }
 108
 109 bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
 110 {
 111         if (bo->destroy == &amdgpu_ttm_bo_destroy)
 112                 return true;
 113         return false;
 114 }
 115
 116 static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
 117                                       struct ttm_placement *placement,
 118                                       struct ttm_place *placements,
 119                                       u32 domain, u64 flags)
 120 {
 121         u32 c = 0, i;
 122
 123         placement->placement = placements;
 124         placement->busy_placement = placements;
 125
 126         if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
 127                 if (flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS &&
 128                         adev->mc.visible_vram_size < adev->mc.real_vram_size) {
 129                         placements[c].fpfn =
 130                                 adev->mc.visible_vram_size >> PAGE_SHIFT;
 131                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 132                                 TTM_PL_FLAG_VRAM | TTM_PL_FLAG_TOPDOWN;
 133                 }
 134                 placements[c].fpfn = 0;
 135                 placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 136                         TTM_PL_FLAG_VRAM;
 137                 if (!(flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED))
 138                         placements[c - 1].flags |= TTM_PL_FLAG_TOPDOWN;
 139         }
 140
 141         if (domain & AMDGPU_GEM_DOMAIN_GTT) {
 142                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
 143                         placements[c].fpfn = 0;
 144                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_TT |
 145                                 TTM_PL_FLAG_UNCACHED;
 146                 } else {
 147                         placements[c].fpfn = 0;
 148                         placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_TT;
 149                 }
 150         }
 151
 152         if (domain & AMDGPU_GEM_DOMAIN_CPU) {
 153                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
 154                         placements[c].fpfn = 0;
 155                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_SYSTEM |
 156                                 TTM_PL_FLAG_UNCACHED;
 157                 } else {
 158                         placements[c].fpfn = 0;
 159                         placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 160                 }
 161         }
 162
 163         if (domain & AMDGPU_GEM_DOMAIN_GDS) {
 164                 placements[c].fpfn = 0;
 165                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 166                         AMDGPU_PL_FLAG_GDS;
 167         }
 168         if (domain & AMDGPU_GEM_DOMAIN_GWS) {
 169                 placements[c].fpfn = 0;
 170                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 171                         AMDGPU_PL_FLAG_GWS;
 172         }
 173         if (domain & AMDGPU_GEM_DOMAIN_OA) {
 174                 placements[c].fpfn = 0;
 175                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 176                         AMDGPU_PL_FLAG_OA;
 177         }
 178
 179         if (!c) {
 180                 placements[c].fpfn = 0;
 181                 placements[c++].flags = TTM_PL_MASK_CACHING |
 182                         TTM_PL_FLAG_SYSTEM;
 183         }
 184         placement->num_placement = c;
 185         placement->num_busy_placement = c;
 186
 187         for (i = 0; i < c; i++) {
 188                 if ((flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 189                         (placements[i].flags & TTM_PL_FLAG_VRAM) &&
 190                         !placements[i].fpfn)
 191                         placements[i].lpfn =
 192                                 adev->mc.visible_vram_size >> PAGE_SHIFT;
 193                 else
 194                         placements[i].lpfn = 0;
 195         }
 196 }
 197
 198 void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *rbo, u32 domain)
 199 {
 200         amdgpu_ttm_placement_init(rbo->adev, &rbo->placement,
 201                                   rbo->placements, domain, rbo->flags);
 202 }
 203
 204 static void amdgpu_fill_placement_to_bo(struct amdgpu_bo *bo,
 205                                         struct ttm_placement *placement)
 206 {
 207         BUG_ON(placement->num_placement > (AMDGPU_GEM_DOMAIN_MAX + 1));
 208
 209         memcpy(bo->placements, placement->placement,
 210                placement->num_placement * sizeof(struct ttm_place));
 211         bo->placement.num_placement = placement->num_placement;
 212         bo->placement.num_busy_placement = placement->num_busy_placement;
 213         bo->placement.placement = bo->placements;
 214         bo->placement.busy_placement = bo->placements;
 215 }
 216
 217 int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
 218                                 unsigned long size, int byte_align,
 219                                 bool kernel, u32 domain, u64 flags,
 220                                 struct sg_table *sg,
 221                                 struct ttm_placement *placement,
 222                                 struct reservation_object *resv,
 223                                 struct amdgpu_bo **bo_ptr)
 224 {
 225         struct amdgpu_bo *bo;
 226         enum ttm_bo_type type;
 227         unsigned long page_align;
 228         size_t acc_size;
 229         int r;
 230
 231         page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 232         size = ALIGN(size, PAGE_SIZE);
 233
 234         if (kernel) {
 235                 type = ttm_bo_type_kernel;
 236         } else if (sg) {
 237                 type = ttm_bo_type_sg;
 238         } else {
 239                 type = ttm_bo_type_device;
 240         }
 241         *bo_ptr = NULL;
 242
 243         acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
 244                                        sizeof(struct amdgpu_bo));
 245
 246         bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
 247         if (bo == NULL)
 248                 return -ENOMEM;
 249         r = drm_gem_object_init(adev->ddev, &bo->gem_base, size);
 250         if (unlikely(r)) {
 251                 kfree(bo);
 252                 return r;
 253         }
 254         bo->adev = adev;
 255         INIT_LIST_HEAD(&bo->list);
 256         INIT_LIST_HEAD(&bo->va);
 257         bo->initial_domain = domain & (AMDGPU_GEM_DOMAIN_VRAM |
 258                                        AMDGPU_GEM_DOMAIN_GTT |
 259                                        AMDGPU_GEM_DOMAIN_CPU |
 260                                        AMDGPU_GEM_DOMAIN_GDS |
 261                                        AMDGPU_GEM_DOMAIN_GWS |
 262                                        AMDGPU_GEM_DOMAIN_OA);
 263
 264         bo->flags = flags;
 265
 266         /* For architectures that don't support WC memory,
 267          * mask out the WC flag from the BO
 268          */
 269         if (!drm_arch_can_wc_memory())
 270                 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 271
 272         amdgpu_fill_placement_to_bo(bo, placement);
 273         /* Kernel allocation are uninterruptible */
 274         r = ttm_bo_init(&adev->mman.bdev, &bo->tbo, size, type,
 275                         &bo->placement, page_align, !kernel, NULL,
 276                         acc_size, sg, resv, &amdgpu_ttm_bo_destroy);
 277         if (unlikely(r != 0)) {
 278                 return r;
 279         }
 280         *bo_ptr = bo;
 281
 282         trace_amdgpu_bo_create(bo);
 283
 284         return 0;
 285 }
 286
 287 int amdgpu_bo_create(struct amdgpu_device *adev,
 288                      unsigned long size, int byte_align,
 289                      bool kernel, u32 domain, u64 flags,
 290                      struct sg_table *sg,
 291                      struct reservation_object *resv,
 292                      struct amdgpu_bo **bo_ptr)
 293 {
 294         struct ttm_placement placement = {0};
 295         struct ttm_place placements[AMDGPU_GEM_DOMAIN_MAX + 1];
 296
 297         memset(&placements, 0,
 298                (AMDGPU_GEM_DOMAIN_MAX + 1) * sizeof(struct ttm_place));
 299
 300         amdgpu_ttm_placement_init(adev, &placement,
 301                                   placements, domain, flags);
 302
 303         return amdgpu_bo_create_restricted(adev, size, byte_align, kernel,
 304                                            domain, flags, sg, &placement,
 305                                            resv, bo_ptr);
 306 }
 307
 308 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
 309 {
 310         bool is_iomem;
 311         int r;
 312
 313         if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 314                 return -EPERM;
 315
 316         if (bo->kptr) {
 317                 if (ptr) {
 318                         *ptr = bo->kptr;
 319                 }
 320                 return 0;
 321         }
 322         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 323         if (r) {
 324                 return r;
 325         }
 326         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 327         if (ptr) {
 328                 *ptr = bo->kptr;
 329         }
 330         return 0;
 331 }
 332
 333 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
 334 {
 335         if (bo->kptr == NULL)
 336                 return;
 337         bo->kptr = NULL;
 338         ttm_bo_kunmap(&bo->kmap);
 339 }
 340
 341 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
 342 {
 343         if (bo == NULL)
 344                 return NULL;
 345
 346         ttm_bo_reference(&bo->tbo);
 347         return bo;
 348 }
 349
 350 void amdgpu_bo_unref(struct amdgpu_bo **bo)
 351 {
 352         struct ttm_buffer_object *tbo;
 353
 354         if ((*bo) == NULL)
 355                 return;
 356
 357         tbo = &((*bo)->tbo);
 358         ttm_bo_unref(&tbo);
 359         if (tbo == NULL)
 360                 *bo = NULL;
 361 }
 362
 363 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
 364                              u64 min_offset, u64 max_offset,
 365                              u64 *gpu_addr)
 366 {
 367         int r, i;
 368         unsigned fpfn, lpfn;
 369
 370         if (amdgpu_ttm_tt_has_userptr(bo->tbo.ttm))
 371                 return -EPERM;
 372
 373         if (WARN_ON_ONCE(min_offset > max_offset))
 374                 return -EINVAL;
 375
 376         if (bo->pin_count) {
 377                 bo->pin_count++;
 378                 if (gpu_addr)
 379                         *gpu_addr = amdgpu_bo_gpu_offset(bo);
 380
 381                 if (max_offset != 0) {
 382                         u64 domain_start;
 383                         if (domain == AMDGPU_GEM_DOMAIN_VRAM)
 384                                 domain_start = bo->adev->mc.vram_start;
 385                         else
 386                                 domain_start = bo->adev->mc.gtt_start;
 387                         WARN_ON_ONCE(max_offset <
 388                                      (amdgpu_bo_gpu_offset(bo) - domain_start));
 389                 }
 390
 391                 return 0;
 392         }
 393         amdgpu_ttm_placement_from_domain(bo, domain);
 394         for (i = 0; i < bo->placement.num_placement; i++) {
 395                 /* force to pin into visible video ram */
 396                 if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 397                     !(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) &&
 398                     (!max_offset || max_offset > bo->adev->mc.visible_vram_size)) {
 399                         if (WARN_ON_ONCE(min_offset >
 400                                          bo->adev->mc.visible_vram_size))
 401                                 return -EINVAL;
 402                         fpfn = min_offset >> PAGE_SHIFT;
 403                         lpfn = bo->adev->mc.visible_vram_size >> PAGE_SHIFT;
 404                 } else {
 405                         fpfn = min_offset >> PAGE_SHIFT;
 406                         lpfn = max_offset >> PAGE_SHIFT;
 407                 }
 408                 if (fpfn > bo->placements[i].fpfn)
 409                         bo->placements[i].fpfn = fpfn;
 410                 if (!bo->placements[i].lpfn ||
 411                     (lpfn && lpfn < bo->placements[i].lpfn))
 412                         bo->placements[i].lpfn = lpfn;
 413                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 414         }
 415
 416         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 417         if (likely(r == 0)) {
 418                 bo->pin_count = 1;
 419                 if (gpu_addr != NULL)
 420                         *gpu_addr = amdgpu_bo_gpu_offset(bo);
 421                 if (domain == AMDGPU_GEM_DOMAIN_VRAM)
 422                         bo->adev->vram_pin_size += amdgpu_bo_size(bo);
 423                 else
 424                         bo->adev->gart_pin_size += amdgpu_bo_size(bo);
 425         } else {
 426                 dev_err(bo->adev->dev, "%p pin failed\n", bo);
 427         }
 428         return r;
 429 }
 430
 431 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
 432 {
 433         return amdgpu_bo_pin_restricted(bo, domain, 0, 0, gpu_addr);
 434 }
 435
 436 int amdgpu_bo_unpin(struct amdgpu_bo *bo)
 437 {
 438         int r, i;
 439
 440         if (!bo->pin_count) {
 441                 dev_warn(bo->adev->dev, "%p unpin not necessary\n", bo);
 442                 return 0;
 443         }
 444         bo->pin_count--;
 445         if (bo->pin_count)
 446                 return 0;
 447         for (i = 0; i < bo->placement.num_placement; i++) {
 448                 bo->placements[i].lpfn = 0;
 449                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 450         }
 451         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 452         if (likely(r == 0)) {
 453                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 454                         bo->adev->vram_pin_size -= amdgpu_bo_size(bo);
 455                 else
 456                         bo->adev->gart_pin_size -= amdgpu_bo_size(bo);
 457         } else {
 458                 dev_err(bo->adev->dev, "%p validate failed for unpin\n", bo);
 459         }
 460         return r;
 461 }
 462
 463 int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
 464 {
 465         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 466         if (0 && (adev->flags & AMD_IS_APU)) {
 467                 /* Useless to evict on IGP chips */
 468                 return 0;
 469         }
 470         return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
 471 }
 472
 473 void amdgpu_bo_force_delete(struct amdgpu_device *adev)
 474 {
 475         struct amdgpu_bo *bo, *n;
 476
 477         if (list_empty(&adev->gem.objects)) {
 478                 return;
 479         }
 480         dev_err(adev->dev, "Userspace still has active objects !\n");
 481         list_for_each_entry_safe(bo, n, &adev->gem.objects, list) {
 482                 dev_err(adev->dev, "%p %p %lu %lu force free\n",
 483                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 484                         *((unsigned long *)&bo->gem_base.refcount));
 485                 mutex_lock(&bo->adev->gem.mutex);
 486                 list_del_init(&bo->list);
 487                 mutex_unlock(&bo->adev->gem.mutex);
 488                 /* this should unref the ttm bo */
 489                 drm_gem_object_unreference_unlocked(&bo->gem_base);
 490         }
 491 }
 492
 493 int amdgpu_bo_init(struct amdgpu_device *adev)
 494 {
 495         /* Add an MTRR for the VRAM */
 496         adev->mc.vram_mtrr = arch_phys_wc_add(adev->mc.aper_base,
 497                                               adev->mc.aper_size);
 498         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 499                 adev->mc.mc_vram_size >> 20,
 500                 (unsigned long long)adev->mc.aper_size >> 20);
 501         DRM_INFO("RAM width %dbits DDR\n",
 502                         adev->mc.vram_width);
 503         return amdgpu_ttm_init(adev);
 504 }
 505
 506 void amdgpu_bo_fini(struct amdgpu_device *adev)
 507 {
 508         amdgpu_ttm_fini(adev);
 509         arch_phys_wc_del(adev->mc.vram_mtrr);
 510 }
 511
 512 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
 513                              struct vm_area_struct *vma)
 514 {
 515         return ttm_fbdev_mmap(vma, &bo->tbo);
 516 }
 517
 518 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
 519 {
 520         if (AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
 521                 return -EINVAL;
 522
 523         bo->tiling_flags = tiling_flags;
 524         return 0;
 525 }
 526
 527 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
 528 {
 529         lockdep_assert_held(&bo->tbo.resv->lock.base);
 530
 531         if (tiling_flags)
 532                 *tiling_flags = bo->tiling_flags;
 533 }
 534
 535 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
 536                             uint32_t metadata_size, uint64_t flags)
 537 {
 538         void *buffer;
 539
 540         if (!metadata_size) {
 541                 if (bo->metadata_size) {
 542                         kfree(bo->metadata);
 543                         bo->metadata_size = 0;
 544                 }
 545                 return 0;
 546         }
 547
 548         if (metadata == NULL)
 549                 return -EINVAL;
 550
 551         buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
 552         if (buffer == NULL)
 553                 return -ENOMEM;
 554
 555         kfree(bo->metadata);
 556         bo->metadata_flags = flags;
 557         bo->metadata = buffer;
 558         bo->metadata_size = metadata_size;
 559
 560         return 0;
 561 }
 562
 563 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
 564                            size_t buffer_size, uint32_t *metadata_size,
 565                            uint64_t *flags)
 566 {
 567         if (!buffer && !metadata_size)
 568                 return -EINVAL;
 569
 570         if (buffer) {
 571                 if (buffer_size < bo->metadata_size)
 572                         return -EINVAL;
 573
 574                 if (bo->metadata_size)
 575                         memcpy(buffer, bo->metadata, bo->metadata_size);
 576         }
 577
 578         if (metadata_size)
 579                 *metadata_size = bo->metadata_size;
 580         if (flags)
 581                 *flags = bo->metadata_flags;
 582
 583         return 0;
 584 }
 585
 586 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
 587                            struct ttm_mem_reg *new_mem)
 588 {
 589         struct amdgpu_bo *rbo;
 590
 591         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 592                 return;
 593
 594         rbo = container_of(bo, struct amdgpu_bo, tbo);
 595         amdgpu_vm_bo_invalidate(rbo->adev, rbo);
 596
 597         /* update statistics */
 598         if (!new_mem)
 599                 return;
 600
 601         /* move_notify is called before move happens */
 602         amdgpu_update_memory_usage(rbo->adev, &bo->mem, new_mem);
 603 }
 604
 605 int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 606 {
 607         struct amdgpu_device *adev;
 608         struct amdgpu_bo *abo;
 609         unsigned long offset, size, lpfn;
 610         int i, r;
 611
 612         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 613                 return 0;
 614
 615         abo = container_of(bo, struct amdgpu_bo, tbo);
 616         adev = abo->adev;
 617         if (bo->mem.mem_type != TTM_PL_VRAM)
 618                 return 0;
 619
 620         size = bo->mem.num_pages << PAGE_SHIFT;
 621         offset = bo->mem.start << PAGE_SHIFT;
 622         if ((offset + size) <= adev->mc.visible_vram_size)
 623                 return 0;
 624
 625         /* hurrah the memory is not visible ! */
 626         amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM);
 627         lpfn =  adev->mc.visible_vram_size >> PAGE_SHIFT;
 628         for (i = 0; i < abo->placement.num_placement; i++) {
 629                 /* Force into visible VRAM */
 630                 if ((abo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 631                     (!abo->placements[i].lpfn || abo->placements[i].lpfn > lpfn))
 632                         abo->placements[i].lpfn = lpfn;
 633         }
 634         r = ttm_bo_validate(bo, &abo->placement, false, false);
 635         if (unlikely(r == -ENOMEM)) {
 636                 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
 637                 return ttm_bo_validate(bo, &abo->placement, false, false);
 638         } else if (unlikely(r != 0)) {
 639                 return r;
 640         }
 641
 642         offset = bo->mem.start << PAGE_SHIFT;
 643         /* this should never happen */
 644         if ((offset + size) > adev->mc.visible_vram_size)
 645                 return -EINVAL;
 646
 647         return 0;
 648 }
 649
 650 /**
 651  * amdgpu_bo_fence - add fence to buffer object
 652  *
 653  * @bo: buffer object in question
 654  * @fence: fence to add
 655  * @shared: true if fence should be added shared
 656  *
 657  */
 658 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct fence *fence,
 659                      bool shared)
 660 {
 661         struct reservation_object *resv = bo->tbo.resv;
 662
 663         if (shared)
 664                 reservation_object_add_shared_fence(resv, fence);
 665         else
 666                 reservation_object_add_excl_fence(resv, fence);
 667 }