drivers/gpu/drm/radeon/radeon_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/radeon_drm.h>
  36 #include "radeon.h"
  37 #include "radeon_trace.h"
  38
  39
  40 int radeon_ttm_init(struct radeon_device *rdev);
  41 void radeon_ttm_fini(struct radeon_device *rdev);
  42 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  43
  44 /*
  45  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  46  * function are calling it.
  47  */
  48
  49 static void radeon_bo_clear_va(struct radeon_bo *bo)
  50 {
  51         struct radeon_bo_va *bo_va, *tmp;
  52
  53         list_for_each_entry_safe(bo_va, tmp, &bo->va, bo_list) {
  54                 /* remove from all vm address space */
  55                 radeon_vm_bo_rmv(bo->rdev, bo_va);
  56         }
  57 }
  58
  59 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  60 {
  61         struct radeon_bo *bo;
  62
  63         bo = container_of(tbo, struct radeon_bo, tbo);
  64         mutex_lock(&bo->rdev->gem.mutex);
  65         list_del_init(&bo->list);
  66         mutex_unlock(&bo->rdev->gem.mutex);
  67         radeon_bo_clear_surface_reg(bo);
  68         radeon_bo_clear_va(bo);
  69         drm_gem_object_release(&bo->gem_base);
  70         kfree(bo);
  71 }
  72
  73 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  74 {
  75         if (bo->destroy == &radeon_ttm_bo_destroy)
  76                 return true;
  77         return false;
  78 }
  79
  80 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  81 {
  82         u32 c = 0;
  83
  84         rbo->placement.fpfn = 0;
  85         rbo->placement.lpfn = 0;
  86         rbo->placement.placement = rbo->placements;
  87         rbo->placement.busy_placement = rbo->placements;
  88         if (domain & RADEON_GEM_DOMAIN_VRAM)
  89                 rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
  90                                         TTM_PL_FLAG_VRAM;
  91         if (domain & RADEON_GEM_DOMAIN_GTT) {
  92                 if (rbo->rdev->flags & RADEON_IS_AGP) {
  93                         rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_TT;
  94                 } else {
  95                         rbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_TT;
  96                 }
  97         }
  98         if (domain & RADEON_GEM_DOMAIN_CPU) {
  99                 if (rbo->rdev->flags & RADEON_IS_AGP) {
 100                         rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_SYSTEM;
 101                 } else {
 102                         rbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 103                 }
 104         }
 105         if (!c)
 106                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 107         rbo->placement.num_placement = c;
 108         rbo->placement.num_busy_placement = c;
 109 }
 110
 111 int radeon_bo_create(struct radeon_device *rdev,
 112                      unsigned long size, int byte_align, bool kernel, u32 domain,
 113                      struct sg_table *sg, struct radeon_bo **bo_ptr)
 114 {
 115         struct radeon_bo *bo;
 116         enum ttm_bo_type type;
 117         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 118         size_t acc_size;
 119         int r;
 120
 121         size = ALIGN(size, PAGE_SIZE);
 122
 123         rdev->mman.bdev.dev_mapping = rdev->ddev->anon_inode->i_mapping;
 124         if (kernel) {
 125                 type = ttm_bo_type_kernel;
 126         } else if (sg) {
 127                 type = ttm_bo_type_sg;
 128         } else {
 129                 type = ttm_bo_type_device;
 130         }
 131         *bo_ptr = NULL;
 132
 133         acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
 134                                        sizeof(struct radeon_bo));
 135
 136         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 137         if (bo == NULL)
 138                 return -ENOMEM;
 139         r = drm_gem_object_init(rdev->ddev, &bo->gem_base, size);
 140         if (unlikely(r)) {
 141                 kfree(bo);
 142                 return r;
 143         }
 144         bo->rdev = rdev;
 145         bo->surface_reg = -1;
 146         INIT_LIST_HEAD(&bo->list);
 147         INIT_LIST_HEAD(&bo->va);
 148         radeon_ttm_placement_from_domain(bo, domain);
 149         /* Kernel allocation are uninterruptible */
 150         down_read(&rdev->pm.mclk_lock);
 151         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 152                         &bo->placement, page_align, !kernel, NULL,
 153                         acc_size, sg, &radeon_ttm_bo_destroy);
 154         up_read(&rdev->pm.mclk_lock);
 155         if (unlikely(r != 0)) {
 156                 return r;
 157         }
 158         *bo_ptr = bo;
 159
 160         trace_radeon_bo_create(bo);
 161
 162         return 0;
 163 }
 164
 165 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 166 {
 167         bool is_iomem;
 168         int r;
 169
 170         if (bo->kptr) {
 171                 if (ptr) {
 172                         *ptr = bo->kptr;
 173                 }
 174                 return 0;
 175         }
 176         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 177         if (r) {
 178                 return r;
 179         }
 180         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 181         if (ptr) {
 182                 *ptr = bo->kptr;
 183         }
 184         radeon_bo_check_tiling(bo, 0, 0);
 185         return 0;
 186 }
 187
 188 void radeon_bo_kunmap(struct radeon_bo *bo)
 189 {
 190         if (bo->kptr == NULL)
 191                 return;
 192         bo->kptr = NULL;
 193         radeon_bo_check_tiling(bo, 0, 0);
 194         ttm_bo_kunmap(&bo->kmap);
 195 }
 196
 197 void radeon_bo_unref(struct radeon_bo **bo)
 198 {
 199         struct ttm_buffer_object *tbo;
 200         struct radeon_device *rdev;
 201
 202         if ((*bo) == NULL)
 203                 return;
 204         rdev = (*bo)->rdev;
 205         tbo = &((*bo)->tbo);
 206         down_read(&rdev->pm.mclk_lock);
 207         ttm_bo_unref(&tbo);
 208         up_read(&rdev->pm.mclk_lock);
 209         if (tbo == NULL)
 210                 *bo = NULL;
 211 }
 212
 213 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 214                              u64 *gpu_addr)
 215 {
 216         int r, i;
 217
 218         if (bo->pin_count) {
 219                 bo->pin_count++;
 220                 if (gpu_addr)
 221                         *gpu_addr = radeon_bo_gpu_offset(bo);
 222
 223                 if (max_offset != 0) {
 224                         u64 domain_start;
 225
 226                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 227                                 domain_start = bo->rdev->mc.vram_start;
 228                         else
 229                                 domain_start = bo->rdev->mc.gtt_start;
 230                         WARN_ON_ONCE(max_offset <
 231                                      (radeon_bo_gpu_offset(bo) - domain_start));
 232                 }
 233
 234                 return 0;
 235         }
 236         radeon_ttm_placement_from_domain(bo, domain);
 237         if (domain == RADEON_GEM_DOMAIN_VRAM) {
 238                 /* force to pin into visible video ram */
 239                 bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 240         }
 241         if (max_offset) {
 242                 u64 lpfn = max_offset >> PAGE_SHIFT;
 243
 244                 if (!bo->placement.lpfn)
 245                         bo->placement.lpfn = bo->rdev->mc.gtt_size >> PAGE_SHIFT;
 246
 247                 if (lpfn < bo->placement.lpfn)
 248                         bo->placement.lpfn = lpfn;
 249         }
 250         for (i = 0; i < bo->placement.num_placement; i++)
 251                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 252         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 253         if (likely(r == 0)) {
 254                 bo->pin_count = 1;
 255                 if (gpu_addr != NULL)
 256                         *gpu_addr = radeon_bo_gpu_offset(bo);
 257         }
 258         if (unlikely(r != 0))
 259                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 260         return r;
 261 }
 262
 263 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 264 {
 265         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 266 }
 267
 268 int radeon_bo_unpin(struct radeon_bo *bo)
 269 {
 270         int r, i;
 271
 272         if (!bo->pin_count) {
 273                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 274                 return 0;
 275         }
 276         bo->pin_count--;
 277         if (bo->pin_count)
 278                 return 0;
 279         for (i = 0; i < bo->placement.num_placement; i++)
 280                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 281         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 282         if (unlikely(r != 0))
 283                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 284         return r;
 285 }
 286
 287 int radeon_bo_evict_vram(struct radeon_device *rdev)
 288 {
 289         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 290         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 291                 if (rdev->mc.igp_sideport_enabled == false)
 292                         /* Useless to evict on IGP chips */
 293                         return 0;
 294         }
 295         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 296 }
 297
 298 void radeon_bo_force_delete(struct radeon_device *rdev)
 299 {
 300         struct radeon_bo *bo, *n;
 301
 302         if (list_empty(&rdev->gem.objects)) {
 303                 return;
 304         }
 305         dev_err(rdev->dev, "Userspace still has active objects !\n");
 306         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 307                 mutex_lock(&rdev->ddev->struct_mutex);
 308                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 309                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 310                         *((unsigned long *)&bo->gem_base.refcount));
 311                 mutex_lock(&bo->rdev->gem.mutex);
 312                 list_del_init(&bo->list);
 313                 mutex_unlock(&bo->rdev->gem.mutex);
 314                 /* this should unref the ttm bo */
 315                 drm_gem_object_unreference(&bo->gem_base);
 316                 mutex_unlock(&rdev->ddev->struct_mutex);
 317         }
 318 }
 319
 320 int radeon_bo_init(struct radeon_device *rdev)
 321 {
 322         /* Add an MTRR for the VRAM */
 323         if (!rdev->fastfb_working) {
 324                 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
 325                                                       rdev->mc.aper_size);
 326         }
 327         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 328                 rdev->mc.mc_vram_size >> 20,
 329                 (unsigned long long)rdev->mc.aper_size >> 20);
 330         DRM_INFO("RAM width %dbits %cDR\n",
 331                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 332         return radeon_ttm_init(rdev);
 333 }
 334
 335 void radeon_bo_fini(struct radeon_device *rdev)
 336 {
 337         radeon_ttm_fini(rdev);
 338         arch_phys_wc_del(rdev->mc.vram_mtrr);
 339 }
 340
 341 void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
 342                                 struct list_head *head)
 343 {
 344         if (lobj->written) {
 345                 list_add(&lobj->tv.head, head);
 346         } else {
 347                 list_add_tail(&lobj->tv.head, head);
 348         }
 349 }
 350
 351 int radeon_bo_list_validate(struct ww_acquire_ctx *ticket,
 352                             struct list_head *head, int ring)
 353 {
 354         struct radeon_bo_list *lobj;
 355         struct radeon_bo *bo;
 356         u32 domain;
 357         int r;
 358
 359         r = ttm_eu_reserve_buffers(ticket, head);
 360         if (unlikely(r != 0)) {
 361                 return r;
 362         }
 363         list_for_each_entry(lobj, head, tv.head) {
 364                 bo = lobj->bo;
 365                 if (!bo->pin_count) {
 366                         domain = lobj->domain;
 367
 368                 retry:
 369                         radeon_ttm_placement_from_domain(bo, domain);
 370                         if (ring == R600_RING_TYPE_UVD_INDEX)
 371                                 radeon_uvd_force_into_uvd_segment(bo);
 372                         r = ttm_bo_validate(&bo->tbo, &bo->placement,
 373                                                 true, false);
 374                         if (unlikely(r)) {
 375                                 if (r != -ERESTARTSYS && domain != lobj->alt_domain) {
 376                                         domain = lobj->alt_domain;
 377                                         goto retry;
 378                                 }
 379                                 ttm_eu_backoff_reservation(ticket, head);
 380                                 return r;
 381                         }
 382                 }
 383                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 384                 lobj->tiling_flags = bo->tiling_flags;
 385         }
 386         return 0;
 387 }
 388
 389 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 390                              struct vm_area_struct *vma)
 391 {
 392         return ttm_fbdev_mmap(vma, &bo->tbo);
 393 }
 394
 395 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 396 {
 397         struct radeon_device *rdev = bo->rdev;
 398         struct radeon_surface_reg *reg;
 399         struct radeon_bo *old_object;
 400         int steal;
 401         int i;
 402
 403         lockdep_assert_held(&bo->tbo.resv->lock.base);
 404
 405         if (!bo->tiling_flags)
 406                 return 0;
 407
 408         if (bo->surface_reg >= 0) {
 409                 reg = &rdev->surface_regs[bo->surface_reg];
 410                 i = bo->surface_reg;
 411                 goto out;
 412         }
 413
 414         steal = -1;
 415         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 416
 417                 reg = &rdev->surface_regs[i];
 418                 if (!reg->bo)
 419                         break;
 420
 421                 old_object = reg->bo;
 422                 if (old_object->pin_count == 0)
 423                         steal = i;
 424         }
 425
 426         /* if we are all out */
 427         if (i == RADEON_GEM_MAX_SURFACES) {
 428                 if (steal == -1)
 429                         return -ENOMEM;
 430                 /* find someone with a surface reg and nuke their BO */
 431                 reg = &rdev->surface_regs[steal];
 432                 old_object = reg->bo;
 433                 /* blow away the mapping */
 434                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 435                 ttm_bo_unmap_virtual(&old_object->tbo);
 436                 old_object->surface_reg = -1;
 437                 i = steal;
 438         }
 439
 440         bo->surface_reg = i;
 441         reg->bo = bo;
 442
 443 out:
 444         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 445                                bo->tbo.mem.start << PAGE_SHIFT,
 446                                bo->tbo.num_pages << PAGE_SHIFT);
 447         return 0;
 448 }
 449
 450 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 451 {
 452         struct radeon_device *rdev = bo->rdev;
 453         struct radeon_surface_reg *reg;
 454
 455         if (bo->surface_reg == -1)
 456                 return;
 457
 458         reg = &rdev->surface_regs[bo->surface_reg];
 459         radeon_clear_surface_reg(rdev, bo->surface_reg);
 460
 461         reg->bo = NULL;
 462         bo->surface_reg = -1;
 463 }
 464
 465 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 466                                 uint32_t tiling_flags, uint32_t pitch)
 467 {
 468         struct radeon_device *rdev = bo->rdev;
 469         int r;
 470
 471         if (rdev->family >= CHIP_CEDAR) {
 472                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 473
 474                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 475                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 476                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 477                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 478                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 479                 switch (bankw) {
 480                 case 0:
 481                 case 1:
 482                 case 2:
 483                 case 4:
 484                 case 8:
 485                         break;
 486                 default:
 487                         return -EINVAL;
 488                 }
 489                 switch (bankh) {
 490                 case 0:
 491                 case 1:
 492                 case 2:
 493                 case 4:
 494                 case 8:
 495                         break;
 496                 default:
 497                         return -EINVAL;
 498                 }
 499                 switch (mtaspect) {
 500                 case 0:
 501                 case 1:
 502                 case 2:
 503                 case 4:
 504                 case 8:
 505                         break;
 506                 default:
 507                         return -EINVAL;
 508                 }
 509                 if (tilesplit > 6) {
 510                         return -EINVAL;
 511                 }
 512                 if (stilesplit > 6) {
 513                         return -EINVAL;
 514                 }
 515         }
 516         r = radeon_bo_reserve(bo, false);
 517         if (unlikely(r != 0))
 518                 return r;
 519         bo->tiling_flags = tiling_flags;
 520         bo->pitch = pitch;
 521         radeon_bo_unreserve(bo);
 522         return 0;
 523 }
 524
 525 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 526                                 uint32_t *tiling_flags,
 527                                 uint32_t *pitch)
 528 {
 529         lockdep_assert_held(&bo->tbo.resv->lock.base);
 530
 531         if (tiling_flags)
 532                 *tiling_flags = bo->tiling_flags;
 533         if (pitch)
 534                 *pitch = bo->pitch;
 535 }
 536
 537 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 538                                 bool force_drop)
 539 {
 540         if (!force_drop)
 541                 lockdep_assert_held(&bo->tbo.resv->lock.base);
 542
 543         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 544                 return 0;
 545
 546         if (force_drop) {
 547                 radeon_bo_clear_surface_reg(bo);
 548                 return 0;
 549         }
 550
 551         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 552                 if (!has_moved)
 553                         return 0;
 554
 555                 if (bo->surface_reg >= 0)
 556                         radeon_bo_clear_surface_reg(bo);
 557                 return 0;
 558         }
 559
 560         if ((bo->surface_reg >= 0) && !has_moved)
 561                 return 0;
 562
 563         return radeon_bo_get_surface_reg(bo);
 564 }
 565
 566 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 567                            struct ttm_mem_reg *mem)
 568 {
 569         struct radeon_bo *rbo;
 570         if (!radeon_ttm_bo_is_radeon_bo(bo))
 571                 return;
 572         rbo = container_of(bo, struct radeon_bo, tbo);
 573         radeon_bo_check_tiling(rbo, 0, 1);
 574         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 575 }
 576
 577 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 578 {
 579         struct radeon_device *rdev;
 580         struct radeon_bo *rbo;
 581         unsigned long offset, size;
 582         int r;
 583
 584         if (!radeon_ttm_bo_is_radeon_bo(bo))
 585                 return 0;
 586         rbo = container_of(bo, struct radeon_bo, tbo);
 587         radeon_bo_check_tiling(rbo, 0, 0);
 588         rdev = rbo->rdev;
 589         if (bo->mem.mem_type != TTM_PL_VRAM)
 590                 return 0;
 591
 592         size = bo->mem.num_pages << PAGE_SHIFT;
 593         offset = bo->mem.start << PAGE_SHIFT;
 594         if ((offset + size) <= rdev->mc.visible_vram_size)
 595                 return 0;
 596
 597         /* hurrah the memory is not visible ! */
 598         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 599         rbo->placement.lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT;
 600         r = ttm_bo_validate(bo, &rbo->placement, false, false);
 601         if (unlikely(r == -ENOMEM)) {
 602                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 603                 return ttm_bo_validate(bo, &rbo->placement, false, false);
 604         } else if (unlikely(r != 0)) {
 605                 return r;
 606         }
 607
 608         offset = bo->mem.start << PAGE_SHIFT;
 609         /* this should never happen */
 610         if ((offset + size) > rdev->mc.visible_vram_size)
 611                 return -EINVAL;
 612
 613         return 0;
 614 }
 615
 616 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait)
 617 {
 618         int r;
 619
 620         r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, 0);
 621         if (unlikely(r != 0))
 622                 return r;
 623         spin_lock(&bo->tbo.bdev->fence_lock);
 624         if (mem_type)
 625                 *mem_type = bo->tbo.mem.mem_type;
 626         if (bo->tbo.sync_obj)
 627                 r = ttm_bo_wait(&bo->tbo, true, true, no_wait);
 628         spin_unlock(&bo->tbo.bdev->fence_lock);
 629         ttm_bo_unreserve(&bo->tbo);
 630         return r;
 631 }