drivers/gpu/drm/radeon/radeon_ttm.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 <ttm/ttm_bo_api.h>
  33 #include <ttm/ttm_bo_driver.h>
  34 #include <ttm/ttm_placement.h>
  35 #include <ttm/ttm_module.h>
  36 #include <ttm/ttm_page_alloc.h>
  37 #include <drm/drmP.h>
  38 #include <drm/radeon_drm.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/slab.h>
  41 #include <linux/swiotlb.h>
  42 #include <linux/swap.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/debugfs.h>
  45 #include "radeon_reg.h"
  46 #include "radeon.h"
  47
  48 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
  49
  50 static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
  51 static void radeon_ttm_debugfs_fini(struct radeon_device *rdev);
  52
  53 static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
  54 {
  55         struct radeon_mman *mman;
  56         struct radeon_device *rdev;
  57
  58         mman = container_of(bdev, struct radeon_mman, bdev);
  59         rdev = container_of(mman, struct radeon_device, mman);
  60         return rdev;
  61 }
  62
  63
  64 /*
  65  * Global memory.
  66  */
  67 static int radeon_ttm_mem_global_init(struct drm_global_reference *ref)
  68 {
  69         return ttm_mem_global_init(ref->object);
  70 }
  71
  72 static void radeon_ttm_mem_global_release(struct drm_global_reference *ref)
  73 {
  74         ttm_mem_global_release(ref->object);
  75 }
  76
  77 static int radeon_ttm_global_init(struct radeon_device *rdev)
  78 {
  79         struct drm_global_reference *global_ref;
  80         int r;
  81
  82         rdev->mman.mem_global_referenced = false;
  83         global_ref = &rdev->mman.mem_global_ref;
  84         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  85         global_ref->size = sizeof(struct ttm_mem_global);
  86         global_ref->init = &radeon_ttm_mem_global_init;
  87         global_ref->release = &radeon_ttm_mem_global_release;
  88         r = drm_global_item_ref(global_ref);
  89         if (r != 0) {
  90                 DRM_ERROR("Failed setting up TTM memory accounting "
  91                           "subsystem.\n");
  92                 return r;
  93         }
  94
  95         rdev->mman.bo_global_ref.mem_glob =
  96                 rdev->mman.mem_global_ref.object;
  97         global_ref = &rdev->mman.bo_global_ref.ref;
  98         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  99         global_ref->size = sizeof(struct ttm_bo_global);
 100         global_ref->init = &ttm_bo_global_init;
 101         global_ref->release = &ttm_bo_global_release;
 102         r = drm_global_item_ref(global_ref);
 103         if (r != 0) {
 104                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
 105                 drm_global_item_unref(&rdev->mman.mem_global_ref);
 106                 return r;
 107         }
 108
 109         rdev->mman.mem_global_referenced = true;
 110         return 0;
 111 }
 112
 113 static void radeon_ttm_global_fini(struct radeon_device *rdev)
 114 {
 115         if (rdev->mman.mem_global_referenced) {
 116                 drm_global_item_unref(&rdev->mman.bo_global_ref.ref);
 117                 drm_global_item_unref(&rdev->mman.mem_global_ref);
 118                 rdev->mman.mem_global_referenced = false;
 119         }
 120 }
 121
 122 static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 123 {
 124         return 0;
 125 }
 126
 127 static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 128                                 struct ttm_mem_type_manager *man)
 129 {
 130         struct radeon_device *rdev;
 131
 132         rdev = radeon_get_rdev(bdev);
 133
 134         switch (type) {
 135         case TTM_PL_SYSTEM:
 136                 /* System memory */
 137                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 138                 man->available_caching = TTM_PL_MASK_CACHING;
 139                 man->default_caching = TTM_PL_FLAG_CACHED;
 140                 break;
 141         case TTM_PL_TT:
 142                 man->func = &ttm_bo_manager_func;
 143                 man->gpu_offset = rdev->mc.gtt_start;
 144                 man->available_caching = TTM_PL_MASK_CACHING;
 145                 man->default_caching = TTM_PL_FLAG_CACHED;
 146                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 147 #if IS_ENABLED(CONFIG_AGP)
 148                 if (rdev->flags & RADEON_IS_AGP) {
 149                         if (!rdev->ddev->agp) {
 150                                 DRM_ERROR("AGP is not enabled for memory type %u\n",
 151                                           (unsigned)type);
 152                                 return -EINVAL;
 153                         }
 154                         if (!rdev->ddev->agp->cant_use_aperture)
 155                                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 156                         man->available_caching = TTM_PL_FLAG_UNCACHED |
 157                                                  TTM_PL_FLAG_WC;
 158                         man->default_caching = TTM_PL_FLAG_WC;
 159                 }
 160 #endif
 161                 break;
 162         case TTM_PL_VRAM:
 163                 /* "On-card" video ram */
 164                 man->func = &ttm_bo_manager_func;
 165                 man->gpu_offset = rdev->mc.vram_start;
 166                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 167                              TTM_MEMTYPE_FLAG_MAPPABLE;
 168                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 169                 man->default_caching = TTM_PL_FLAG_WC;
 170                 break;
 171         default:
 172                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 173                 return -EINVAL;
 174         }
 175         return 0;
 176 }
 177
 178 static void radeon_evict_flags(struct ttm_buffer_object *bo,
 179                                 struct ttm_placement *placement)
 180 {
 181         static struct ttm_place placements = {
 182                 .fpfn = 0,
 183                 .lpfn = 0,
 184                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 185         };
 186
 187         struct radeon_bo *rbo;
 188
 189         if (!radeon_ttm_bo_is_radeon_bo(bo)) {
 190                 placement->placement = &placements;
 191                 placement->busy_placement = &placements;
 192                 placement->num_placement = 1;
 193                 placement->num_busy_placement = 1;
 194                 return;
 195         }
 196         rbo = container_of(bo, struct radeon_bo, tbo);
 197         switch (bo->mem.mem_type) {
 198         case TTM_PL_VRAM:
 199                 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
 200                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 201                 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
 202                          bo->mem.start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
 203                         unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 204                         int i;
 205
 206                         /* Try evicting to the CPU inaccessible part of VRAM
 207                          * first, but only set GTT as busy placement, so this
 208                          * BO will be evicted to GTT rather than causing other
 209                          * BOs to be evicted from VRAM
 210                          */
 211                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
 212                                                          RADEON_GEM_DOMAIN_GTT);
 213                         rbo->placement.num_busy_placement = 0;
 214                         for (i = 0; i < rbo->placement.num_placement; i++) {
 215                                 if (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) {
 216                                         if (rbo->placements[0].fpfn < fpfn)
 217                                                 rbo->placements[0].fpfn = fpfn;
 218                                 } else {
 219                                         rbo->placement.busy_placement =
 220                                                 &rbo->placements[i];
 221                                         rbo->placement.num_busy_placement = 1;
 222                                 }
 223                         }
 224                 } else
 225                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 226                 break;
 227         case TTM_PL_TT:
 228         default:
 229                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 230         }
 231         *placement = rbo->placement;
 232 }
 233
 234 static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 235 {
 236         struct radeon_bo *rbo = container_of(bo, struct radeon_bo, tbo);
 237
 238         return drm_vma_node_verify_access(&rbo->gem_base.vma_node, filp);
 239 }
 240
 241 static void radeon_move_null(struct ttm_buffer_object *bo,
 242                              struct ttm_mem_reg *new_mem)
 243 {
 244         struct ttm_mem_reg *old_mem = &bo->mem;
 245
 246         BUG_ON(old_mem->mm_node != NULL);
 247         *old_mem = *new_mem;
 248         new_mem->mm_node = NULL;
 249 }
 250
 251 static int radeon_move_blit(struct ttm_buffer_object *bo,
 252                         bool evict, bool no_wait_gpu,
 253                         struct ttm_mem_reg *new_mem,
 254                         struct ttm_mem_reg *old_mem)
 255 {
 256         struct radeon_device *rdev;
 257         uint64_t old_start, new_start;
 258         struct radeon_fence *fence;
 259         unsigned num_pages;
 260         int r, ridx;
 261
 262         rdev = radeon_get_rdev(bo->bdev);
 263         ridx = radeon_copy_ring_index(rdev);
 264         old_start = old_mem->start << PAGE_SHIFT;
 265         new_start = new_mem->start << PAGE_SHIFT;
 266
 267         switch (old_mem->mem_type) {
 268         case TTM_PL_VRAM:
 269                 old_start += rdev->mc.vram_start;
 270                 break;
 271         case TTM_PL_TT:
 272                 old_start += rdev->mc.gtt_start;
 273                 break;
 274         default:
 275                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 276                 return -EINVAL;
 277         }
 278         switch (new_mem->mem_type) {
 279         case TTM_PL_VRAM:
 280                 new_start += rdev->mc.vram_start;
 281                 break;
 282         case TTM_PL_TT:
 283                 new_start += rdev->mc.gtt_start;
 284                 break;
 285         default:
 286                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 287                 return -EINVAL;
 288         }
 289         if (!rdev->ring[ridx].ready) {
 290                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 291                 return -EINVAL;
 292         }
 293
 294         BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
 295
 296         num_pages = new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 297         fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->resv);
 298         if (IS_ERR(fence))
 299                 return PTR_ERR(fence);
 300
 301         r = ttm_bo_move_accel_cleanup(bo, &fence->base,
 302                                       evict, no_wait_gpu, new_mem);
 303         radeon_fence_unref(&fence);
 304         return r;
 305 }
 306
 307 static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
 308                                 bool evict, bool interruptible,
 309                                 bool no_wait_gpu,
 310                                 struct ttm_mem_reg *new_mem)
 311 {
 312         struct radeon_device *rdev;
 313         struct ttm_mem_reg *old_mem = &bo->mem;
 314         struct ttm_mem_reg tmp_mem;
 315         struct ttm_place placements;
 316         struct ttm_placement placement;
 317         int r;
 318
 319         rdev = radeon_get_rdev(bo->bdev);
 320         tmp_mem = *new_mem;
 321         tmp_mem.mm_node = NULL;
 322         placement.num_placement = 1;
 323         placement.placement = &placements;
 324         placement.num_busy_placement = 1;
 325         placement.busy_placement = &placements;
 326         placements.fpfn = 0;
 327         placements.lpfn = 0;
 328         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 329         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 330                              interruptible, no_wait_gpu);
 331         if (unlikely(r)) {
 332                 return r;
 333         }
 334
 335         r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
 336         if (unlikely(r)) {
 337                 goto out_cleanup;
 338         }
 339
 340         r = ttm_tt_bind(bo->ttm, &tmp_mem);
 341         if (unlikely(r)) {
 342                 goto out_cleanup;
 343         }
 344         r = radeon_move_blit(bo, true, no_wait_gpu, &tmp_mem, old_mem);
 345         if (unlikely(r)) {
 346                 goto out_cleanup;
 347         }
 348         r = ttm_bo_move_ttm(bo, true, no_wait_gpu, new_mem);
 349 out_cleanup:
 350         ttm_bo_mem_put(bo, &tmp_mem);
 351         return r;
 352 }
 353
 354 static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
 355                                 bool evict, bool interruptible,
 356                                 bool no_wait_gpu,
 357                                 struct ttm_mem_reg *new_mem)
 358 {
 359         struct radeon_device *rdev;
 360         struct ttm_mem_reg *old_mem = &bo->mem;
 361         struct ttm_mem_reg tmp_mem;
 362         struct ttm_placement placement;
 363         struct ttm_place placements;
 364         int r;
 365
 366         rdev = radeon_get_rdev(bo->bdev);
 367         tmp_mem = *new_mem;
 368         tmp_mem.mm_node = NULL;
 369         placement.num_placement = 1;
 370         placement.placement = &placements;
 371         placement.num_busy_placement = 1;
 372         placement.busy_placement = &placements;
 373         placements.fpfn = 0;
 374         placements.lpfn = 0;
 375         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 376         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 377                              interruptible, no_wait_gpu);
 378         if (unlikely(r)) {
 379                 return r;
 380         }
 381         r = ttm_bo_move_ttm(bo, true, no_wait_gpu, &tmp_mem);
 382         if (unlikely(r)) {
 383                 goto out_cleanup;
 384         }
 385         r = radeon_move_blit(bo, true, no_wait_gpu, new_mem, old_mem);
 386         if (unlikely(r)) {
 387                 goto out_cleanup;
 388         }
 389 out_cleanup:
 390         ttm_bo_mem_put(bo, &tmp_mem);
 391         return r;
 392 }
 393
 394 static int radeon_bo_move(struct ttm_buffer_object *bo,
 395                         bool evict, bool interruptible,
 396                         bool no_wait_gpu,
 397                         struct ttm_mem_reg *new_mem)
 398 {
 399         struct radeon_device *rdev;
 400         struct ttm_mem_reg *old_mem = &bo->mem;
 401         int r;
 402
 403         rdev = radeon_get_rdev(bo->bdev);
 404         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 405                 radeon_move_null(bo, new_mem);
 406                 return 0;
 407         }
 408         if ((old_mem->mem_type == TTM_PL_TT &&
 409              new_mem->mem_type == TTM_PL_SYSTEM) ||
 410             (old_mem->mem_type == TTM_PL_SYSTEM &&
 411              new_mem->mem_type == TTM_PL_TT)) {
 412                 /* bind is enough */
 413                 radeon_move_null(bo, new_mem);
 414                 return 0;
 415         }
 416         if (!rdev->ring[radeon_copy_ring_index(rdev)].ready ||
 417             rdev->asic->copy.copy == NULL) {
 418                 /* use memcpy */
 419                 goto memcpy;
 420         }
 421
 422         if (old_mem->mem_type == TTM_PL_VRAM &&
 423             new_mem->mem_type == TTM_PL_SYSTEM) {
 424                 r = radeon_move_vram_ram(bo, evict, interruptible,
 425                                         no_wait_gpu, new_mem);
 426         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 427                    new_mem->mem_type == TTM_PL_VRAM) {
 428                 r = radeon_move_ram_vram(bo, evict, interruptible,
 429                                             no_wait_gpu, new_mem);
 430         } else {
 431                 r = radeon_move_blit(bo, evict, no_wait_gpu, new_mem, old_mem);
 432         }
 433
 434         if (r) {
 435 memcpy:
 436                 r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
 437                 if (r) {
 438                         return r;
 439                 }
 440         }
 441
 442         /* update statistics */
 443         atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &rdev->num_bytes_moved);
 444         return 0;
 445 }
 446
 447 static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 448 {
 449         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 450         struct radeon_device *rdev = radeon_get_rdev(bdev);
 451
 452         mem->bus.addr = NULL;
 453         mem->bus.offset = 0;
 454         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 455         mem->bus.base = 0;
 456         mem->bus.is_iomem = false;
 457         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 458                 return -EINVAL;
 459         switch (mem->mem_type) {
 460         case TTM_PL_SYSTEM:
 461                 /* system memory */
 462                 return 0;
 463         case TTM_PL_TT:
 464 #if IS_ENABLED(CONFIG_AGP)
 465                 if (rdev->flags & RADEON_IS_AGP) {
 466                         /* RADEON_IS_AGP is set only if AGP is active */
 467                         mem->bus.offset = mem->start << PAGE_SHIFT;
 468                         mem->bus.base = rdev->mc.agp_base;
 469                         mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
 470                 }
 471 #endif
 472                 break;
 473         case TTM_PL_VRAM:
 474                 mem->bus.offset = mem->start << PAGE_SHIFT;
 475                 /* check if it's visible */
 476                 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
 477                         return -EINVAL;
 478                 mem->bus.base = rdev->mc.aper_base;
 479                 mem->bus.is_iomem = true;
 480 #ifdef __alpha__
 481                 /*
 482                  * Alpha: use bus.addr to hold the ioremap() return,
 483                  * so we can modify bus.base below.
 484                  */
 485                 if (mem->placement & TTM_PL_FLAG_WC)
 486                         mem->bus.addr =
 487                                 ioremap_wc(mem->bus.base + mem->bus.offset,
 488                                            mem->bus.size);
 489                 else
 490                         mem->bus.addr =
 491                                 ioremap_nocache(mem->bus.base + mem->bus.offset,
 492                                                 mem->bus.size);
 493
 494                 /*
 495                  * Alpha: Use just the bus offset plus
 496                  * the hose/domain memory base for bus.base.
 497                  * It then can be used to build PTEs for VRAM
 498                  * access, as done in ttm_bo_vm_fault().
 499                  */
 500                 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
 501                         rdev->ddev->hose->dense_mem_base;
 502 #endif
 503                 break;
 504         default:
 505                 return -EINVAL;
 506         }
 507         return 0;
 508 }
 509
 510 static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 511 {
 512 }
 513
 514 /*
 515  * TTM backend functions.
 516  */
 517 struct radeon_ttm_tt {
 518         struct ttm_dma_tt               ttm;
 519         struct radeon_device            *rdev;
 520         u64                             offset;
 521
 522         uint64_t                        userptr;
 523         struct mm_struct                *usermm;
 524         uint32_t                        userflags;
 525 };
 526
 527 /* prepare the sg table with the user pages */
 528 static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm)
 529 {
 530         struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
 531         struct radeon_ttm_tt *gtt = (void *)ttm;
 532         unsigned pinned = 0, nents;
 533         int r;
 534
 535         int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 536         enum dma_data_direction direction = write ?
 537                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 538
 539         if (current->mm != gtt->usermm)
 540                 return -EPERM;
 541
 542         if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
 543                 /* check that we only pin down anonymous memory
 544                    to prevent problems with writeback */
 545                 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
 546                 struct vm_area_struct *vma;
 547                 vma = find_vma(gtt->usermm, gtt->userptr);
 548                 if (!vma || vma->vm_file || vma->vm_end < end)
 549                         return -EPERM;
 550         }
 551
 552         do {
 553                 unsigned num_pages = ttm->num_pages - pinned;
 554                 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
 555                 struct page **pages = ttm->pages + pinned;
 556
 557                 r = get_user_pages(current, current->mm, userptr, num_pages,
 558                                    write, 0, pages, NULL);
 559                 if (r < 0)
 560                         goto release_pages;
 561
 562                 pinned += r;
 563
 564         } while (pinned < ttm->num_pages);
 565
 566         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 567                                       ttm->num_pages << PAGE_SHIFT,
 568                                       GFP_KERNEL);
 569         if (r)
 570                 goto release_sg;
 571
 572         r = -ENOMEM;
 573         nents = dma_map_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 574         if (nents != ttm->sg->nents)
 575                 goto release_sg;
 576
 577         drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
 578                                          gtt->ttm.dma_address, ttm->num_pages);
 579
 580         return 0;
 581
 582 release_sg:
 583         kfree(ttm->sg);
 584
 585 release_pages:
 586         release_pages(ttm->pages, pinned, 0);
 587         return r;
 588 }
 589
 590 static void radeon_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
 591 {
 592         struct radeon_device *rdev = radeon_get_rdev(ttm->bdev);
 593         struct radeon_ttm_tt *gtt = (void *)ttm;
 594         struct sg_page_iter sg_iter;
 595
 596         int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 597         enum dma_data_direction direction = write ?
 598                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 599
 600         /* double check that we don't free the table twice */
 601         if (!ttm->sg->sgl)
 602                 return;
 603
 604         /* free the sg table and pages again */
 605         dma_unmap_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 606
 607         for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
 608                 struct page *page = sg_page_iter_page(&sg_iter);
 609                 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
 610                         set_page_dirty(page);
 611
 612                 mark_page_accessed(page);
 613                 page_cache_release(page);
 614         }
 615
 616         sg_free_table(ttm->sg);
 617 }
 618
 619 static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
 620                                    struct ttm_mem_reg *bo_mem)
 621 {
 622         struct radeon_ttm_tt *gtt = (void*)ttm;
 623         uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
 624                 RADEON_GART_PAGE_WRITE;
 625         int r;
 626
 627         if (gtt->userptr) {
 628                 radeon_ttm_tt_pin_userptr(ttm);
 629                 flags &= ~RADEON_GART_PAGE_WRITE;
 630         }
 631
 632         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 633         if (!ttm->num_pages) {
 634                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 635                      ttm->num_pages, bo_mem, ttm);
 636         }
 637         if (ttm->caching_state == tt_cached)
 638                 flags |= RADEON_GART_PAGE_SNOOP;
 639         r = radeon_gart_bind(gtt->rdev, gtt->offset, ttm->num_pages,
 640                              ttm->pages, gtt->ttm.dma_address, flags);
 641         if (r) {
 642                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 643                           ttm->num_pages, (unsigned)gtt->offset);
 644                 return r;
 645         }
 646         return 0;
 647 }
 648
 649 static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
 650 {
 651         struct radeon_ttm_tt *gtt = (void *)ttm;
 652
 653         radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
 654
 655         if (gtt->userptr)
 656                 radeon_ttm_tt_unpin_userptr(ttm);
 657
 658         return 0;
 659 }
 660
 661 static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
 662 {
 663         struct radeon_ttm_tt *gtt = (void *)ttm;
 664
 665         ttm_dma_tt_fini(&gtt->ttm);
 666         kfree(gtt);
 667 }
 668
 669 static struct ttm_backend_func radeon_backend_func = {
 670         .bind = &radeon_ttm_backend_bind,
 671         .unbind = &radeon_ttm_backend_unbind,
 672         .destroy = &radeon_ttm_backend_destroy,
 673 };
 674
 675 static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
 676                                     unsigned long size, uint32_t page_flags,
 677                                     struct page *dummy_read_page)
 678 {
 679         struct radeon_device *rdev;
 680         struct radeon_ttm_tt *gtt;
 681
 682         rdev = radeon_get_rdev(bdev);
 683 #if IS_ENABLED(CONFIG_AGP)
 684         if (rdev->flags & RADEON_IS_AGP) {
 685                 return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
 686                                          size, page_flags, dummy_read_page);
 687         }
 688 #endif
 689
 690         gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
 691         if (gtt == NULL) {
 692                 return NULL;
 693         }
 694         gtt->ttm.ttm.func = &radeon_backend_func;
 695         gtt->rdev = rdev;
 696         if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
 697                 kfree(gtt);
 698                 return NULL;
 699         }
 700         return &gtt->ttm.ttm;
 701 }
 702
 703 static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct ttm_tt *ttm)
 704 {
 705         if (!ttm || ttm->func != &radeon_backend_func)
 706                 return NULL;
 707         return (struct radeon_ttm_tt *)ttm;
 708 }
 709
 710 static int radeon_ttm_tt_populate(struct ttm_tt *ttm)
 711 {
 712         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
 713         struct radeon_device *rdev;
 714         unsigned i;
 715         int r;
 716         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 717
 718         if (ttm->state != tt_unpopulated)
 719                 return 0;
 720
 721         if (gtt && gtt->userptr) {
 722                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
 723                 if (!ttm->sg)
 724                         return -ENOMEM;
 725
 726                 ttm->page_flags |= TTM_PAGE_FLAG_SG;
 727                 ttm->state = tt_unbound;
 728                 return 0;
 729         }
 730
 731         if (slave && ttm->sg) {
 732                 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
 733                                                  gtt->ttm.dma_address, ttm->num_pages);
 734                 ttm->state = tt_unbound;
 735                 return 0;
 736         }
 737
 738         rdev = radeon_get_rdev(ttm->bdev);
 739 #if IS_ENABLED(CONFIG_AGP)
 740         if (rdev->flags & RADEON_IS_AGP) {
 741                 return ttm_agp_tt_populate(ttm);
 742         }
 743 #endif
 744
 745 #ifdef CONFIG_SWIOTLB
 746         if (swiotlb_nr_tbl()) {
 747                 return ttm_dma_populate(&gtt->ttm, rdev->dev);
 748         }
 749 #endif
 750
 751         r = ttm_pool_populate(ttm);
 752         if (r) {
 753                 return r;
 754         }
 755
 756         for (i = 0; i < ttm->num_pages; i++) {
 757                 gtt->ttm.dma_address[i] = pci_map_page(rdev->pdev, ttm->pages[i],
 758                                                        0, PAGE_SIZE,
 759                                                        PCI_DMA_BIDIRECTIONAL);
 760                 if (pci_dma_mapping_error(rdev->pdev, gtt->ttm.dma_address[i])) {
 761                         while (i--) {
 762                                 pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
 763                                                PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 764                                 gtt->ttm.dma_address[i] = 0;
 765                         }
 766                         ttm_pool_unpopulate(ttm);
 767                         return -EFAULT;
 768                 }
 769         }
 770         return 0;
 771 }
 772
 773 static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
 774 {
 775         struct radeon_device *rdev;
 776         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
 777         unsigned i;
 778         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 779
 780         if (gtt && gtt->userptr) {
 781                 kfree(ttm->sg);
 782                 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
 783                 return;
 784         }
 785
 786         if (slave)
 787                 return;
 788
 789         rdev = radeon_get_rdev(ttm->bdev);
 790 #if IS_ENABLED(CONFIG_AGP)
 791         if (rdev->flags & RADEON_IS_AGP) {
 792                 ttm_agp_tt_unpopulate(ttm);
 793                 return;
 794         }
 795 #endif
 796
 797 #ifdef CONFIG_SWIOTLB
 798         if (swiotlb_nr_tbl()) {
 799                 ttm_dma_unpopulate(&gtt->ttm, rdev->dev);
 800                 return;
 801         }
 802 #endif
 803
 804         for (i = 0; i < ttm->num_pages; i++) {
 805                 if (gtt->ttm.dma_address[i]) {
 806                         pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
 807                                        PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 808                 }
 809         }
 810
 811         ttm_pool_unpopulate(ttm);
 812 }
 813
 814 int radeon_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
 815                               uint32_t flags)
 816 {
 817         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
 818
 819         if (gtt == NULL)
 820                 return -EINVAL;
 821
 822         gtt->userptr = addr;
 823         gtt->usermm = current->mm;
 824         gtt->userflags = flags;
 825         return 0;
 826 }
 827
 828 bool radeon_ttm_tt_has_userptr(struct ttm_tt *ttm)
 829 {
 830         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
 831
 832         if (gtt == NULL)
 833                 return false;
 834
 835         return !!gtt->userptr;
 836 }
 837
 838 bool radeon_ttm_tt_is_readonly(struct ttm_tt *ttm)
 839 {
 840         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(ttm);
 841
 842         if (gtt == NULL)
 843                 return false;
 844
 845         return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 846 }
 847
 848 static struct ttm_bo_driver radeon_bo_driver = {
 849         .ttm_tt_create = &radeon_ttm_tt_create,
 850         .ttm_tt_populate = &radeon_ttm_tt_populate,
 851         .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
 852         .invalidate_caches = &radeon_invalidate_caches,
 853         .init_mem_type = &radeon_init_mem_type,
 854         .evict_flags = &radeon_evict_flags,
 855         .move = &radeon_bo_move,
 856         .verify_access = &radeon_verify_access,
 857         .move_notify = &radeon_bo_move_notify,
 858         .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
 859         .io_mem_reserve = &radeon_ttm_io_mem_reserve,
 860         .io_mem_free = &radeon_ttm_io_mem_free,
 861 };
 862
 863 int radeon_ttm_init(struct radeon_device *rdev)
 864 {
 865         int r;
 866
 867         r = radeon_ttm_global_init(rdev);
 868         if (r) {
 869                 return r;
 870         }
 871         /* No others user of address space so set it to 0 */
 872         r = ttm_bo_device_init(&rdev->mman.bdev,
 873                                rdev->mman.bo_global_ref.ref.object,
 874                                &radeon_bo_driver,
 875                                rdev->ddev->anon_inode->i_mapping,
 876                                DRM_FILE_PAGE_OFFSET,
 877                                rdev->need_dma32);
 878         if (r) {
 879                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 880                 return r;
 881         }
 882         rdev->mman.initialized = true;
 883         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
 884                                 rdev->mc.real_vram_size >> PAGE_SHIFT);
 885         if (r) {
 886                 DRM_ERROR("Failed initializing VRAM heap.\n");
 887                 return r;
 888         }
 889         /* Change the size here instead of the init above so only lpfn is affected */
 890         radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
 891
 892         r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
 893                              RADEON_GEM_DOMAIN_VRAM, 0, NULL,
 894                              NULL, &rdev->stollen_vga_memory);
 895         if (r) {
 896                 return r;
 897         }
 898         r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 899         if (r)
 900                 return r;
 901         r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
 902         radeon_bo_unreserve(rdev->stollen_vga_memory);
 903         if (r) {
 904                 radeon_bo_unref(&rdev->stollen_vga_memory);
 905                 return r;
 906         }
 907         DRM_INFO("radeon: %uM of VRAM memory ready\n",
 908                  (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
 909         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
 910                                 rdev->mc.gtt_size >> PAGE_SHIFT);
 911         if (r) {
 912                 DRM_ERROR("Failed initializing GTT heap.\n");
 913                 return r;
 914         }
 915         DRM_INFO("radeon: %uM of GTT memory ready.\n",
 916                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
 917
 918         r = radeon_ttm_debugfs_init(rdev);
 919         if (r) {
 920                 DRM_ERROR("Failed to init debugfs\n");
 921                 return r;
 922         }
 923         return 0;
 924 }
 925
 926 void radeon_ttm_fini(struct radeon_device *rdev)
 927 {
 928         int r;
 929
 930         if (!rdev->mman.initialized)
 931                 return;
 932         radeon_ttm_debugfs_fini(rdev);
 933         if (rdev->stollen_vga_memory) {
 934                 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 935                 if (r == 0) {
 936                         radeon_bo_unpin(rdev->stollen_vga_memory);
 937                         radeon_bo_unreserve(rdev->stollen_vga_memory);
 938                 }
 939                 radeon_bo_unref(&rdev->stollen_vga_memory);
 940         }
 941         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 942         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
 943         ttm_bo_device_release(&rdev->mman.bdev);
 944         radeon_gart_fini(rdev);
 945         radeon_ttm_global_fini(rdev);
 946         rdev->mman.initialized = false;
 947         DRM_INFO("radeon: ttm finalized\n");
 948 }
 949
 950 /* this should only be called at bootup or when userspace
 951  * isn't running */
 952 void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
 953 {
 954         struct ttm_mem_type_manager *man;
 955
 956         if (!rdev->mman.initialized)
 957                 return;
 958
 959         man = &rdev->mman.bdev.man[TTM_PL_VRAM];
 960         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
 961         man->size = size >> PAGE_SHIFT;
 962 }
 963
 964 static struct vm_operations_struct radeon_ttm_vm_ops;
 965 static const struct vm_operations_struct *ttm_vm_ops = NULL;
 966
 967 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 968 {
 969         struct ttm_buffer_object *bo;
 970         struct radeon_device *rdev;
 971         int r;
 972
 973         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 974         if (bo == NULL) {
 975                 return VM_FAULT_NOPAGE;
 976         }
 977         rdev = radeon_get_rdev(bo->bdev);
 978         down_read(&rdev->pm.mclk_lock);
 979         r = ttm_vm_ops->fault(vma, vmf);
 980         up_read(&rdev->pm.mclk_lock);
 981         return r;
 982 }
 983
 984 int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
 985 {
 986         struct drm_file *file_priv;
 987         struct radeon_device *rdev;
 988         int r;
 989
 990         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 991                 return -EINVAL;
 992         }
 993
 994         file_priv = filp->private_data;
 995         rdev = file_priv->minor->dev->dev_private;
 996         if (rdev == NULL) {
 997                 return -EINVAL;
 998         }
 999         r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
1000         if (unlikely(r != 0)) {
1001                 return r;
1002         }
1003         if (unlikely(ttm_vm_ops == NULL)) {
1004                 ttm_vm_ops = vma->vm_ops;
1005                 radeon_ttm_vm_ops = *ttm_vm_ops;
1006                 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
1007         }
1008         vma->vm_ops = &radeon_ttm_vm_ops;
1009         return 0;
1010 }
1011
1012 #if defined(CONFIG_DEBUG_FS)
1013
1014 static int radeon_mm_dump_table(struct seq_file *m, void *data)
1015 {
1016         struct drm_info_node *node = (struct drm_info_node *)m->private;
1017         unsigned ttm_pl = *(int *)node->info_ent->data;
1018         struct drm_device *dev = node->minor->dev;
1019         struct radeon_device *rdev = dev->dev_private;
1020         struct drm_mm *mm = (struct drm_mm *)rdev->mman.bdev.man[ttm_pl].priv;
1021         int ret;
1022         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
1023
1024         spin_lock(&glob->lru_lock);
1025         ret = drm_mm_dump_table(m, mm);
1026         spin_unlock(&glob->lru_lock);
1027         return ret;
1028 }
1029
1030 static int ttm_pl_vram = TTM_PL_VRAM;
1031 static int ttm_pl_tt = TTM_PL_TT;
1032
1033 static struct drm_info_list radeon_ttm_debugfs_list[] = {
1034         {"radeon_vram_mm", radeon_mm_dump_table, 0, &ttm_pl_vram},
1035         {"radeon_gtt_mm", radeon_mm_dump_table, 0, &ttm_pl_tt},
1036         {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
1037 #ifdef CONFIG_SWIOTLB
1038         {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
1039 #endif
1040 };
1041
1042 static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
1043 {
1044         struct radeon_device *rdev = inode->i_private;
1045         i_size_write(inode, rdev->mc.mc_vram_size);
1046         filep->private_data = inode->i_private;
1047         return 0;
1048 }
1049
1050 static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
1051                                     size_t size, loff_t *pos)
1052 {
1053         struct radeon_device *rdev = f->private_data;
1054         ssize_t result = 0;
1055         int r;
1056
1057         if (size & 0x3 || *pos & 0x3)
1058                 return -EINVAL;
1059
1060         while (size) {
1061                 unsigned long flags;
1062                 uint32_t value;
1063
1064                 if (*pos >= rdev->mc.mc_vram_size)
1065                         return result;
1066
1067                 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
1068                 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
1069                 if (rdev->family >= CHIP_CEDAR)
1070                         WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
1071                 value = RREG32(RADEON_MM_DATA);
1072                 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
1073
1074                 r = put_user(value, (uint32_t *)buf);
1075                 if (r)
1076                         return r;
1077
1078                 result += 4;
1079                 buf += 4;
1080                 *pos += 4;
1081                 size -= 4;
1082         }
1083
1084         return result;
1085 }
1086
1087 static const struct file_operations radeon_ttm_vram_fops = {
1088         .owner = THIS_MODULE,
1089         .open = radeon_ttm_vram_open,
1090         .read = radeon_ttm_vram_read,
1091         .llseek = default_llseek
1092 };
1093
1094 static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
1095 {
1096         struct radeon_device *rdev = inode->i_private;
1097         i_size_write(inode, rdev->mc.gtt_size);
1098         filep->private_data = inode->i_private;
1099         return 0;
1100 }
1101
1102 static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
1103                                    size_t size, loff_t *pos)
1104 {
1105         struct radeon_device *rdev = f->private_data;
1106         ssize_t result = 0;
1107         int r;
1108
1109         while (size) {
1110                 loff_t p = *pos / PAGE_SIZE;
1111                 unsigned off = *pos & ~PAGE_MASK;
1112                 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1113                 struct page *page;
1114                 void *ptr;
1115
1116                 if (p >= rdev->gart.num_cpu_pages)
1117                         return result;
1118
1119                 page = rdev->gart.pages[p];
1120                 if (page) {
1121                         ptr = kmap(page);
1122                         ptr += off;
1123
1124                         r = copy_to_user(buf, ptr, cur_size);
1125                         kunmap(rdev->gart.pages[p]);
1126                 } else
1127                         r = clear_user(buf, cur_size);
1128
1129                 if (r)
1130                         return -EFAULT;
1131
1132                 result += cur_size;
1133                 buf += cur_size;
1134                 *pos += cur_size;
1135                 size -= cur_size;
1136         }
1137
1138         return result;
1139 }
1140
1141 static const struct file_operations radeon_ttm_gtt_fops = {
1142         .owner = THIS_MODULE,
1143         .open = radeon_ttm_gtt_open,
1144         .read = radeon_ttm_gtt_read,
1145         .llseek = default_llseek
1146 };
1147
1148 #endif
1149
1150 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
1151 {
1152 #if defined(CONFIG_DEBUG_FS)
1153         unsigned count;
1154
1155         struct drm_minor *minor = rdev->ddev->primary;
1156         struct dentry *ent, *root = minor->debugfs_root;
1157
1158         ent = debugfs_create_file("radeon_vram", S_IFREG | S_IRUGO, root,
1159                                   rdev, &radeon_ttm_vram_fops);
1160         if (IS_ERR(ent))
1161                 return PTR_ERR(ent);
1162         rdev->mman.vram = ent;
1163
1164         ent = debugfs_create_file("radeon_gtt", S_IFREG | S_IRUGO, root,
1165                                   rdev, &radeon_ttm_gtt_fops);
1166         if (IS_ERR(ent))
1167                 return PTR_ERR(ent);
1168         rdev->mman.gtt = ent;
1169
1170         count = ARRAY_SIZE(radeon_ttm_debugfs_list);
1171
1172 #ifdef CONFIG_SWIOTLB
1173         if (!swiotlb_nr_tbl())
1174                 --count;
1175 #endif
1176
1177         return radeon_debugfs_add_files(rdev, radeon_ttm_debugfs_list, count);
1178 #else
1179
1180         return 0;
1181 #endif
1182 }
1183
1184 static void radeon_ttm_debugfs_fini(struct radeon_device *rdev)
1185 {
1186 #if defined(CONFIG_DEBUG_FS)
1187
1188         debugfs_remove(rdev->mman.vram);
1189         rdev->mman.vram = NULL;
1190
1191         debugfs_remove(rdev->mman.gtt);
1192         rdev->mman.gtt = NULL;
1193 #endif
1194 }