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 "amdgpu.h"
  37 #include "amdgpu_trace.h"
  38
  39
  40 int amdgpu_ttm_init(struct amdgpu_device *adev);
  41 void amdgpu_ttm_fini(struct amdgpu_device *adev);
  42
  43 static u64 amdgpu_get_vis_part_size(struct amdgpu_device *adev,
  44                                                 struct ttm_mem_reg *mem)
  45 {
  46         u64 ret = 0;
  47         if (mem->start << PAGE_SHIFT < adev->mc.visible_vram_size) {
  48                 ret = (u64)((mem->start << PAGE_SHIFT) + mem->size) >
  49                            adev->mc.visible_vram_size ?
  50                            adev->mc.visible_vram_size - (mem->start << PAGE_SHIFT) :
  51                            mem->size;
  52         }
  53         return ret;
  54 }
  55
  56 static void amdgpu_update_memory_usage(struct amdgpu_device *adev,
  57                        struct ttm_mem_reg *old_mem,
  58                        struct ttm_mem_reg *new_mem)
  59 {
  60         u64 vis_size;
  61         if (!adev)
  62                 return;
  63
  64         if (new_mem) {
  65                 switch (new_mem->mem_type) {
  66                 case TTM_PL_TT:
  67                         atomic64_add(new_mem->size, &adev->gtt_usage);
  68                         break;
  69                 case TTM_PL_VRAM:
  70                         atomic64_add(new_mem->size, &adev->vram_usage);
  71                         vis_size = amdgpu_get_vis_part_size(adev, new_mem);
  72                         atomic64_add(vis_size, &adev->vram_vis_usage);
  73                         break;
  74                 }
  75         }
  76
  77         if (old_mem) {
  78                 switch (old_mem->mem_type) {
  79                 case TTM_PL_TT:
  80                         atomic64_sub(old_mem->size, &adev->gtt_usage);
  81                         break;
  82                 case TTM_PL_VRAM:
  83                         atomic64_sub(old_mem->size, &adev->vram_usage);
  84                         vis_size = amdgpu_get_vis_part_size(adev, old_mem);
  85                         atomic64_sub(vis_size, &adev->vram_vis_usage);
  86                         break;
  87                 }
  88         }
  89 }
  90
  91 static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  92 {
  93         struct amdgpu_bo *bo;
  94
  95         bo = container_of(tbo, struct amdgpu_bo, tbo);
  96
  97         amdgpu_update_memory_usage(bo->adev, &bo->tbo.mem, NULL);
  98
  99         mutex_lock(&bo->adev->gem.mutex);
 100         list_del_init(&bo->list);
 101         mutex_unlock(&bo->adev->gem.mutex);
 102         drm_gem_object_release(&bo->gem_base);
 103         kfree(bo->metadata);
 104         kfree(bo);
 105 }
 106
 107 bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
 108 {
 109         if (bo->destroy == &amdgpu_ttm_bo_destroy)
 110                 return true;
 111         return false;
 112 }
 113
 114 static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
 115                                       struct ttm_placement *placement,
 116                                       struct ttm_place *placements,
 117                                       u32 domain, u64 flags)
 118 {
 119         u32 c = 0, i;
 120
 121         placement->placement = placements;
 122         placement->busy_placement = placements;
 123
 124         if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
 125                 if (flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS &&
 126                         adev->mc.visible_vram_size < adev->mc.real_vram_size) {
 127                         placements[c].fpfn =
 128                                 adev->mc.visible_vram_size >> PAGE_SHIFT;
 129                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 130                                 TTM_PL_FLAG_VRAM;
 131                 }
 132                 placements[c].fpfn = 0;
 133                 placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 134                         TTM_PL_FLAG_VRAM;
 135         }
 136
 137         if (domain & AMDGPU_GEM_DOMAIN_GTT) {
 138                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
 139                         placements[c].fpfn = 0;
 140                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_TT |
 141                                 TTM_PL_FLAG_UNCACHED;
 142                 } else {
 143                         placements[c].fpfn = 0;
 144                         placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_TT;
 145                 }
 146         }
 147
 148         if (domain & AMDGPU_GEM_DOMAIN_CPU) {
 149                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
 150                         placements[c].fpfn = 0;
 151                         placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_SYSTEM |
 152                                 TTM_PL_FLAG_UNCACHED;
 153                 } else {
 154                         placements[c].fpfn = 0;
 155                         placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 156                 }
 157         }
 158
 159         if (domain & AMDGPU_GEM_DOMAIN_GDS) {
 160                 placements[c].fpfn = 0;
 161                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 162                         AMDGPU_PL_FLAG_GDS;
 163         }
 164         if (domain & AMDGPU_GEM_DOMAIN_GWS) {
 165                 placements[c].fpfn = 0;
 166                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 167                         AMDGPU_PL_FLAG_GWS;
 168         }
 169         if (domain & AMDGPU_GEM_DOMAIN_OA) {
 170                 placements[c].fpfn = 0;
 171                 placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 172                         AMDGPU_PL_FLAG_OA;
 173         }
 174
 175         if (!c) {
 176                 placements[c].fpfn = 0;
 177                 placements[c++].flags = TTM_PL_MASK_CACHING |
 178                         TTM_PL_FLAG_SYSTEM;
 179         }
 180         placement->num_placement = c;
 181         placement->num_busy_placement = c;
 182
 183         for (i = 0; i < c; i++) {
 184                 if ((flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 185                         (placements[i].flags & TTM_PL_FLAG_VRAM) &&
 186                         !placements[i].fpfn)
 187                         placements[i].lpfn =
 188                                 adev->mc.visible_vram_size >> PAGE_SHIFT;
 189                 else
 190                         placements[i].lpfn = 0;
 191         }
 192 }
 193
 194 void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *rbo, u32 domain)
 195 {
 196         amdgpu_ttm_placement_init(rbo->adev, &rbo->placement,
 197                                   rbo->placements, domain, rbo->flags);
 198 }
 199
 200 static void amdgpu_fill_placement_to_bo(struct amdgpu_bo *bo,
 201                                         struct ttm_placement *placement)
 202 {
 203         BUG_ON(placement->num_placement > (AMDGPU_GEM_DOMAIN_MAX + 1));
 204
 205         memcpy(bo->placements, placement->placement,
 206                placement->num_placement * sizeof(struct ttm_place));
 207         bo->placement.num_placement = placement->num_placement;
 208         bo->placement.num_busy_placement = placement->num_busy_placement;
 209         bo->placement.placement = bo->placements;
 210         bo->placement.busy_placement = bo->placements;
 211 }
 212
 213 int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
 214                                 unsigned long size, int byte_align,
 215                                 bool kernel, u32 domain, u64 flags,
 216                                 struct sg_table *sg,
 217                                 struct ttm_placement *placement,
 218                                 struct amdgpu_bo **bo_ptr)
 219 {
 220         struct amdgpu_bo *bo;
 221         enum ttm_bo_type type;
 222         unsigned long page_align;
 223         size_t acc_size;
 224         int r;
 225
 226         /* VI has a hw bug where VM PTEs have to be allocated in groups of 8.
 227          * do this as a temporary workaround
 228          */
 229         if (!(domain & (AMDGPU_GEM_DOMAIN_GDS | AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA))) {
 230                 if ((adev->asic_type >= CHIP_TOPAZ) && (adev->asic_type != CHIP_FIJI)) {
 231                         if (byte_align & 0x7fff)
 232                                 byte_align = ALIGN(byte_align, 0x8000);
 233                         if (size & 0x7fff)
 234                                 size = ALIGN(size, 0x8000);
 235                 }
 236         }
 237
 238         page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 239         size = ALIGN(size, PAGE_SIZE);
 240
 241         if (kernel) {
 242                 type = ttm_bo_type_kernel;
 243         } else if (sg) {
 244                 type = ttm_bo_type_sg;
 245         } else {
 246                 type = ttm_bo_type_device;
 247         }
 248         *bo_ptr = NULL;
 249
 250         acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
 251                                        sizeof(struct amdgpu_bo));
 252
 253         bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
 254         if (bo == NULL)
 255                 return -ENOMEM;
 256         r = drm_gem_object_init(adev->ddev, &bo->gem_base, size);
 257         if (unlikely(r)) {
 258                 kfree(bo);
 259                 return r;
 260         }
 261         bo->adev = adev;
 262         INIT_LIST_HEAD(&bo->list);
 263         INIT_LIST_HEAD(&bo->va);
 264         bo->initial_domain = domain & (AMDGPU_GEM_DOMAIN_VRAM |
 265                                        AMDGPU_GEM_DOMAIN_GTT |
 266                                        AMDGPU_GEM_DOMAIN_CPU |
 267                                        AMDGPU_GEM_DOMAIN_GDS |
 268                                        AMDGPU_GEM_DOMAIN_GWS |
 269                                        AMDGPU_GEM_DOMAIN_OA);
 270
 271         bo->flags = flags;
 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, NULL, &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, struct amdgpu_bo **bo_ptr)
 291 {
 292         struct ttm_placement placement = {0};
 293         struct ttm_place placements[AMDGPU_GEM_DOMAIN_MAX + 1];
 294
 295         memset(&placements, 0,
 296                (AMDGPU_GEM_DOMAIN_MAX + 1) * sizeof(struct ttm_place));
 297
 298         amdgpu_ttm_placement_init(adev, &placement,
 299                                   placements, domain, flags);
 300
 301         return amdgpu_bo_create_restricted(adev, size, byte_align,
 302                                            kernel, domain, flags,
 303                                            sg,
 304                                            &placement,
 305                                            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 (lpfn && lpfn < bo->placements[i].lpfn)
 411                         bo->placements[i].lpfn = lpfn;
 412                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 413         }
 414
 415         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 416         if (likely(r == 0)) {
 417                 bo->pin_count = 1;
 418                 if (gpu_addr != NULL)
 419                         *gpu_addr = amdgpu_bo_gpu_offset(bo);
 420                 if (domain == AMDGPU_GEM_DOMAIN_VRAM)
 421                         bo->adev->vram_pin_size += amdgpu_bo_size(bo);
 422                 else
 423                         bo->adev->gart_pin_size += amdgpu_bo_size(bo);
 424         } else {
 425                 dev_err(bo->adev->dev, "%p pin failed\n", bo);
 426         }
 427         return r;
 428 }
 429
 430 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
 431 {
 432         return amdgpu_bo_pin_restricted(bo, domain, 0, 0, gpu_addr);
 433 }
 434
 435 int amdgpu_bo_unpin(struct amdgpu_bo *bo)
 436 {
 437         int r, i;
 438
 439         if (!bo->pin_count) {
 440                 dev_warn(bo->adev->dev, "%p unpin not necessary\n", bo);
 441                 return 0;
 442         }
 443         bo->pin_count--;
 444         if (bo->pin_count)
 445                 return 0;
 446         for (i = 0; i < bo->placement.num_placement; i++) {
 447                 bo->placements[i].lpfn = 0;
 448                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 449         }
 450         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 451         if (likely(r == 0)) {
 452                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 453                         bo->adev->vram_pin_size -= amdgpu_bo_size(bo);
 454                 else
 455                         bo->adev->gart_pin_size -= amdgpu_bo_size(bo);
 456         } else {
 457                 dev_err(bo->adev->dev, "%p validate failed for unpin\n", bo);
 458         }
 459         return r;
 460 }
 461
 462 int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
 463 {
 464         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 465         if (0 && (adev->flags & AMD_IS_APU)) {
 466                 /* Useless to evict on IGP chips */
 467                 return 0;
 468         }
 469         return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
 470 }
 471
 472 void amdgpu_bo_force_delete(struct amdgpu_device *adev)
 473 {
 474         struct amdgpu_bo *bo, *n;
 475
 476         if (list_empty(&adev->gem.objects)) {
 477                 return;
 478         }
 479         dev_err(adev->dev, "Userspace still has active objects !\n");
 480         list_for_each_entry_safe(bo, n, &adev->gem.objects, list) {
 481                 mutex_lock(&adev->ddev->struct_mutex);
 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(&bo->gem_base);
 490                 mutex_unlock(&adev->ddev->struct_mutex);
 491         }
 492 }
 493
 494 int amdgpu_bo_init(struct amdgpu_device *adev)
 495 {
 496         /* Add an MTRR for the VRAM */
 497         adev->mc.vram_mtrr = arch_phys_wc_add(adev->mc.aper_base,
 498                                               adev->mc.aper_size);
 499         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 500                 adev->mc.mc_vram_size >> 20,
 501                 (unsigned long long)adev->mc.aper_size >> 20);
 502         DRM_INFO("RAM width %dbits DDR\n",
 503                         adev->mc.vram_width);
 504         return amdgpu_ttm_init(adev);
 505 }
 506
 507 void amdgpu_bo_fini(struct amdgpu_device *adev)
 508 {
 509         amdgpu_ttm_fini(adev);
 510         arch_phys_wc_del(adev->mc.vram_mtrr);
 511 }
 512
 513 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
 514                              struct vm_area_struct *vma)
 515 {
 516         return ttm_fbdev_mmap(vma, &bo->tbo);
 517 }
 518
 519 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
 520 {
 521         if (AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
 522                 return -EINVAL;
 523
 524         bo->tiling_flags = tiling_flags;
 525         return 0;
 526 }
 527
 528 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
 529 {
 530         lockdep_assert_held(&bo->tbo.resv->lock.base);
 531
 532         if (tiling_flags)
 533                 *tiling_flags = bo->tiling_flags;
 534 }
 535
 536 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
 537                             uint32_t metadata_size, uint64_t flags)
 538 {
 539         void *buffer;
 540
 541         if (!metadata_size) {
 542                 if (bo->metadata_size) {
 543                         kfree(bo->metadata);
 544                         bo->metadata_size = 0;
 545                 }
 546                 return 0;
 547         }
 548
 549         if (metadata == NULL)
 550                 return -EINVAL;
 551
 552         buffer = kzalloc(metadata_size, GFP_KERNEL);
 553         if (buffer == NULL)
 554                 return -ENOMEM;
 555
 556         memcpy(buffer, metadata, metadata_size);
 557
 558         kfree(bo->metadata);
 559         bo->metadata_flags = flags;
 560         bo->metadata = buffer;
 561         bo->metadata_size = metadata_size;
 562
 563         return 0;
 564 }
 565
 566 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
 567                            size_t buffer_size, uint32_t *metadata_size,
 568                            uint64_t *flags)
 569 {
 570         if (!buffer && !metadata_size)
 571                 return -EINVAL;
 572
 573         if (buffer) {
 574                 if (buffer_size < bo->metadata_size)
 575                         return -EINVAL;
 576
 577                 if (bo->metadata_size)
 578                         memcpy(buffer, bo->metadata, bo->metadata_size);
 579         }
 580
 581         if (metadata_size)
 582                 *metadata_size = bo->metadata_size;
 583         if (flags)
 584                 *flags = bo->metadata_flags;
 585
 586         return 0;
 587 }
 588
 589 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
 590                            struct ttm_mem_reg *new_mem)
 591 {
 592         struct amdgpu_bo *rbo;
 593
 594         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 595                 return;
 596
 597         rbo = container_of(bo, struct amdgpu_bo, tbo);
 598         amdgpu_vm_bo_invalidate(rbo->adev, rbo);
 599
 600         /* update statistics */
 601         if (!new_mem)
 602                 return;
 603
 604         /* move_notify is called before move happens */
 605         amdgpu_update_memory_usage(rbo->adev, &bo->mem, new_mem);
 606 }
 607
 608 int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 609 {
 610         struct amdgpu_device *adev;
 611         struct amdgpu_bo *abo;
 612         unsigned long offset, size, lpfn;
 613         int i, r;
 614
 615         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 616                 return 0;
 617
 618         abo = container_of(bo, struct amdgpu_bo, tbo);
 619         adev = abo->adev;
 620         if (bo->mem.mem_type != TTM_PL_VRAM)
 621                 return 0;
 622
 623         size = bo->mem.num_pages << PAGE_SHIFT;
 624         offset = bo->mem.start << PAGE_SHIFT;
 625         if ((offset + size) <= adev->mc.visible_vram_size)
 626                 return 0;
 627
 628         /* hurrah the memory is not visible ! */
 629         amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM);
 630         lpfn =  adev->mc.visible_vram_size >> PAGE_SHIFT;
 631         for (i = 0; i < abo->placement.num_placement; i++) {
 632                 /* Force into visible VRAM */
 633                 if ((abo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 634                     (!abo->placements[i].lpfn || abo->placements[i].lpfn > lpfn))
 635                         abo->placements[i].lpfn = lpfn;
 636         }
 637         r = ttm_bo_validate(bo, &abo->placement, false, false);
 638         if (unlikely(r == -ENOMEM)) {
 639                 amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
 640                 return ttm_bo_validate(bo, &abo->placement, false, false);
 641         } else if (unlikely(r != 0)) {
 642                 return r;
 643         }
 644
 645         offset = bo->mem.start << PAGE_SHIFT;
 646         /* this should never happen */
 647         if ((offset + size) > adev->mc.visible_vram_size)
 648                 return -EINVAL;
 649
 650         return 0;
 651 }
 652
 653 /**
 654  * amdgpu_bo_fence - add fence to buffer object
 655  *
 656  * @bo: buffer object in question
 657  * @fence: fence to add
 658  * @shared: true if fence should be added shared
 659  *
 660  */
 661 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct fence *fence,
 662                      bool shared)
 663 {
 664         struct reservation_object *resv = bo->tbo.resv;
 665
 666         if (shared)
 667                 reservation_object_add_shared_fence(resv, fence);
 668         else
 669                 reservation_object_add_excl_fence(resv, fence);
 670 }