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 "radeon_reg.h"
  42 #include "radeon.h"
  43
  44 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
  45
  46 static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
  47
  48 static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
  49 {
  50         struct radeon_mman *mman;
  51         struct radeon_device *rdev;
  52
  53         mman = container_of(bdev, struct radeon_mman, bdev);
  54         rdev = container_of(mman, struct radeon_device, mman);
  55         return rdev;
  56 }
  57
  58
  59 /*
  60  * Global memory.
  61  */
  62 static int radeon_ttm_mem_global_init(struct drm_global_reference *ref)
  63 {
  64         return ttm_mem_global_init(ref->object);
  65 }
  66
  67 static void radeon_ttm_mem_global_release(struct drm_global_reference *ref)
  68 {
  69         ttm_mem_global_release(ref->object);
  70 }
  71
  72 static int radeon_ttm_global_init(struct radeon_device *rdev)
  73 {
  74         struct drm_global_reference *global_ref;
  75         int r;
  76
  77         rdev->mman.mem_global_referenced = false;
  78         global_ref = &rdev->mman.mem_global_ref;
  79         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  80         global_ref->size = sizeof(struct ttm_mem_global);
  81         global_ref->init = &radeon_ttm_mem_global_init;
  82         global_ref->release = &radeon_ttm_mem_global_release;
  83         r = drm_global_item_ref(global_ref);
  84         if (r != 0) {
  85                 DRM_ERROR("Failed setting up TTM memory accounting "
  86                           "subsystem.\n");
  87                 return r;
  88         }
  89
  90         rdev->mman.bo_global_ref.mem_glob =
  91                 rdev->mman.mem_global_ref.object;
  92         global_ref = &rdev->mman.bo_global_ref.ref;
  93         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  94         global_ref->size = sizeof(struct ttm_bo_global);
  95         global_ref->init = &ttm_bo_global_init;
  96         global_ref->release = &ttm_bo_global_release;
  97         r = drm_global_item_ref(global_ref);
  98         if (r != 0) {
  99                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
 100                 drm_global_item_unref(&rdev->mman.mem_global_ref);
 101                 return r;
 102         }
 103
 104         rdev->mman.mem_global_referenced = true;
 105         return 0;
 106 }
 107
 108 static void radeon_ttm_global_fini(struct radeon_device *rdev)
 109 {
 110         if (rdev->mman.mem_global_referenced) {
 111                 drm_global_item_unref(&rdev->mman.bo_global_ref.ref);
 112                 drm_global_item_unref(&rdev->mman.mem_global_ref);
 113                 rdev->mman.mem_global_referenced = false;
 114         }
 115 }
 116
 117 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
 118
 119 static struct ttm_backend*
 120 radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
 121 {
 122         struct radeon_device *rdev;
 123
 124         rdev = radeon_get_rdev(bdev);
 125 #if __OS_HAS_AGP
 126         if (rdev->flags & RADEON_IS_AGP) {
 127                 return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
 128         } else
 129 #endif
 130         {
 131                 return radeon_ttm_backend_create(rdev);
 132         }
 133 }
 134
 135 static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 136 {
 137         return 0;
 138 }
 139
 140 static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 141                                 struct ttm_mem_type_manager *man)
 142 {
 143         struct radeon_device *rdev;
 144
 145         rdev = radeon_get_rdev(bdev);
 146
 147         switch (type) {
 148         case TTM_PL_SYSTEM:
 149                 /* System memory */
 150                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 151                 man->available_caching = TTM_PL_MASK_CACHING;
 152                 man->default_caching = TTM_PL_FLAG_CACHED;
 153                 break;
 154         case TTM_PL_TT:
 155                 man->func = &ttm_bo_manager_func;
 156                 man->gpu_offset = rdev->mc.gtt_start;
 157                 man->available_caching = TTM_PL_MASK_CACHING;
 158                 man->default_caching = TTM_PL_FLAG_CACHED;
 159                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 160 #if __OS_HAS_AGP
 161                 if (rdev->flags & RADEON_IS_AGP) {
 162                         if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
 163                                 DRM_ERROR("AGP is not enabled for memory type %u\n",
 164                                           (unsigned)type);
 165                                 return -EINVAL;
 166                         }
 167                         if (!rdev->ddev->agp->cant_use_aperture)
 168                                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 169                         man->available_caching = TTM_PL_FLAG_UNCACHED |
 170                                                  TTM_PL_FLAG_WC;
 171                         man->default_caching = TTM_PL_FLAG_WC;
 172                 }
 173 #endif
 174                 break;
 175         case TTM_PL_VRAM:
 176                 /* "On-card" video ram */
 177                 man->func = &ttm_bo_manager_func;
 178                 man->gpu_offset = rdev->mc.vram_start;
 179                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 180                              TTM_MEMTYPE_FLAG_MAPPABLE;
 181                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 182                 man->default_caching = TTM_PL_FLAG_WC;
 183                 break;
 184         default:
 185                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 186                 return -EINVAL;
 187         }
 188         return 0;
 189 }
 190
 191 static void radeon_evict_flags(struct ttm_buffer_object *bo,
 192                                 struct ttm_placement *placement)
 193 {
 194         struct radeon_bo *rbo;
 195         static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 196
 197         if (!radeon_ttm_bo_is_radeon_bo(bo)) {
 198                 placement->fpfn = 0;
 199                 placement->lpfn = 0;
 200                 placement->placement = &placements;
 201                 placement->busy_placement = &placements;
 202                 placement->num_placement = 1;
 203                 placement->num_busy_placement = 1;
 204                 return;
 205         }
 206         rbo = container_of(bo, struct radeon_bo, tbo);
 207         switch (bo->mem.mem_type) {
 208         case TTM_PL_VRAM:
 209                 if (rbo->rdev->cp.ready == false)
 210                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 211                 else
 212                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 213                 break;
 214         case TTM_PL_TT:
 215         default:
 216                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 217         }
 218         *placement = rbo->placement;
 219 }
 220
 221 static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 222 {
 223         return 0;
 224 }
 225
 226 static void radeon_move_null(struct ttm_buffer_object *bo,
 227                              struct ttm_mem_reg *new_mem)
 228 {
 229         struct ttm_mem_reg *old_mem = &bo->mem;
 230
 231         BUG_ON(old_mem->mm_node != NULL);
 232         *old_mem = *new_mem;
 233         new_mem->mm_node = NULL;
 234 }
 235
 236 static int radeon_move_blit(struct ttm_buffer_object *bo,
 237                         bool evict, int no_wait_reserve, bool no_wait_gpu,
 238                         struct ttm_mem_reg *new_mem,
 239                         struct ttm_mem_reg *old_mem)
 240 {
 241         struct radeon_device *rdev;
 242         uint64_t old_start, new_start;
 243         struct radeon_fence *fence;
 244         int r;
 245
 246         rdev = radeon_get_rdev(bo->bdev);
 247         r = radeon_fence_create(rdev, &fence);
 248         if (unlikely(r)) {
 249                 return r;
 250         }
 251         old_start = old_mem->start << PAGE_SHIFT;
 252         new_start = new_mem->start << PAGE_SHIFT;
 253
 254         switch (old_mem->mem_type) {
 255         case TTM_PL_VRAM:
 256                 old_start += rdev->mc.vram_start;
 257                 break;
 258         case TTM_PL_TT:
 259                 old_start += rdev->mc.gtt_start;
 260                 break;
 261         default:
 262                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 263                 return -EINVAL;
 264         }
 265         switch (new_mem->mem_type) {
 266         case TTM_PL_VRAM:
 267                 new_start += rdev->mc.vram_start;
 268                 break;
 269         case TTM_PL_TT:
 270                 new_start += rdev->mc.gtt_start;
 271                 break;
 272         default:
 273                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 274                 return -EINVAL;
 275         }
 276         if (!rdev->cp.ready) {
 277                 DRM_ERROR("Trying to move memory with CP turned off.\n");
 278                 return -EINVAL;
 279         }
 280
 281         BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
 282
 283         r = radeon_copy(rdev, old_start, new_start,
 284                         new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */
 285                         fence);
 286         /* FIXME: handle copy error */
 287         r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
 288                                       evict, no_wait_reserve, no_wait_gpu, new_mem);
 289         radeon_fence_unref(&fence);
 290         return r;
 291 }
 292
 293 static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
 294                                 bool evict, bool interruptible,
 295                                 bool no_wait_reserve, bool no_wait_gpu,
 296                                 struct ttm_mem_reg *new_mem)
 297 {
 298         struct radeon_device *rdev;
 299         struct ttm_mem_reg *old_mem = &bo->mem;
 300         struct ttm_mem_reg tmp_mem;
 301         u32 placements;
 302         struct ttm_placement placement;
 303         int r;
 304
 305         rdev = radeon_get_rdev(bo->bdev);
 306         tmp_mem = *new_mem;
 307         tmp_mem.mm_node = NULL;
 308         placement.fpfn = 0;
 309         placement.lpfn = 0;
 310         placement.num_placement = 1;
 311         placement.placement = &placements;
 312         placement.num_busy_placement = 1;
 313         placement.busy_placement = &placements;
 314         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 315         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 316                              interruptible, no_wait_reserve, no_wait_gpu);
 317         if (unlikely(r)) {
 318                 return r;
 319         }
 320
 321         r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
 322         if (unlikely(r)) {
 323                 goto out_cleanup;
 324         }
 325
 326         r = ttm_tt_bind(bo->ttm, &tmp_mem);
 327         if (unlikely(r)) {
 328                 goto out_cleanup;
 329         }
 330         r = radeon_move_blit(bo, true, no_wait_reserve, no_wait_gpu, &tmp_mem, old_mem);
 331         if (unlikely(r)) {
 332                 goto out_cleanup;
 333         }
 334         r = ttm_bo_move_ttm(bo, true, no_wait_reserve, no_wait_gpu, new_mem);
 335 out_cleanup:
 336         ttm_bo_mem_put(bo, &tmp_mem);
 337         return r;
 338 }
 339
 340 static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
 341                                 bool evict, bool interruptible,
 342                                 bool no_wait_reserve, bool no_wait_gpu,
 343                                 struct ttm_mem_reg *new_mem)
 344 {
 345         struct radeon_device *rdev;
 346         struct ttm_mem_reg *old_mem = &bo->mem;
 347         struct ttm_mem_reg tmp_mem;
 348         struct ttm_placement placement;
 349         u32 placements;
 350         int r;
 351
 352         rdev = radeon_get_rdev(bo->bdev);
 353         tmp_mem = *new_mem;
 354         tmp_mem.mm_node = NULL;
 355         placement.fpfn = 0;
 356         placement.lpfn = 0;
 357         placement.num_placement = 1;
 358         placement.placement = &placements;
 359         placement.num_busy_placement = 1;
 360         placement.busy_placement = &placements;
 361         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 362         r = ttm_bo_mem_space(bo, &placement, &tmp_mem, interruptible, no_wait_reserve, no_wait_gpu);
 363         if (unlikely(r)) {
 364                 return r;
 365         }
 366         r = ttm_bo_move_ttm(bo, true, no_wait_reserve, no_wait_gpu, &tmp_mem);
 367         if (unlikely(r)) {
 368                 goto out_cleanup;
 369         }
 370         r = radeon_move_blit(bo, true, no_wait_reserve, no_wait_gpu, new_mem, old_mem);
 371         if (unlikely(r)) {
 372                 goto out_cleanup;
 373         }
 374 out_cleanup:
 375         ttm_bo_mem_put(bo, &tmp_mem);
 376         return r;
 377 }
 378
 379 static int radeon_bo_move(struct ttm_buffer_object *bo,
 380                         bool evict, bool interruptible,
 381                         bool no_wait_reserve, bool no_wait_gpu,
 382                         struct ttm_mem_reg *new_mem)
 383 {
 384         struct radeon_device *rdev;
 385         struct ttm_mem_reg *old_mem = &bo->mem;
 386         int r;
 387
 388         rdev = radeon_get_rdev(bo->bdev);
 389         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 390                 radeon_move_null(bo, new_mem);
 391                 return 0;
 392         }
 393         if ((old_mem->mem_type == TTM_PL_TT &&
 394              new_mem->mem_type == TTM_PL_SYSTEM) ||
 395             (old_mem->mem_type == TTM_PL_SYSTEM &&
 396              new_mem->mem_type == TTM_PL_TT)) {
 397                 /* bind is enough */
 398                 radeon_move_null(bo, new_mem);
 399                 return 0;
 400         }
 401         if (!rdev->cp.ready || rdev->asic->copy == NULL) {
 402                 /* use memcpy */
 403                 goto memcpy;
 404         }
 405
 406         if (old_mem->mem_type == TTM_PL_VRAM &&
 407             new_mem->mem_type == TTM_PL_SYSTEM) {
 408                 r = radeon_move_vram_ram(bo, evict, interruptible,
 409                                         no_wait_reserve, no_wait_gpu, new_mem);
 410         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 411                    new_mem->mem_type == TTM_PL_VRAM) {
 412                 r = radeon_move_ram_vram(bo, evict, interruptible,
 413                                             no_wait_reserve, no_wait_gpu, new_mem);
 414         } else {
 415                 r = radeon_move_blit(bo, evict, no_wait_reserve, no_wait_gpu, new_mem, old_mem);
 416         }
 417
 418         if (r) {
 419 memcpy:
 420                 r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
 421         }
 422         return r;
 423 }
 424
 425 static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 426 {
 427         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 428         struct radeon_device *rdev = radeon_get_rdev(bdev);
 429
 430         mem->bus.addr = NULL;
 431         mem->bus.offset = 0;
 432         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 433         mem->bus.base = 0;
 434         mem->bus.is_iomem = false;
 435         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 436                 return -EINVAL;
 437         switch (mem->mem_type) {
 438         case TTM_PL_SYSTEM:
 439                 /* system memory */
 440                 return 0;
 441         case TTM_PL_TT:
 442 #if __OS_HAS_AGP
 443                 if (rdev->flags & RADEON_IS_AGP) {
 444                         /* RADEON_IS_AGP is set only if AGP is active */
 445                         mem->bus.offset = mem->start << PAGE_SHIFT;
 446                         mem->bus.base = rdev->mc.agp_base;
 447                         mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
 448                 }
 449 #endif
 450                 break;
 451         case TTM_PL_VRAM:
 452                 mem->bus.offset = mem->start << PAGE_SHIFT;
 453                 /* check if it's visible */
 454                 if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
 455                         return -EINVAL;
 456                 mem->bus.base = rdev->mc.aper_base;
 457                 mem->bus.is_iomem = true;
 458                 break;
 459         default:
 460                 return -EINVAL;
 461         }
 462         return 0;
 463 }
 464
 465 static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 466 {
 467 }
 468
 469 static int radeon_sync_obj_wait(void *sync_obj, void *sync_arg,
 470                                 bool lazy, bool interruptible)
 471 {
 472         return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
 473 }
 474
 475 static int radeon_sync_obj_flush(void *sync_obj, void *sync_arg)
 476 {
 477         return 0;
 478 }
 479
 480 static void radeon_sync_obj_unref(void **sync_obj)
 481 {
 482         radeon_fence_unref((struct radeon_fence **)sync_obj);
 483 }
 484
 485 static void *radeon_sync_obj_ref(void *sync_obj)
 486 {
 487         return radeon_fence_ref((struct radeon_fence *)sync_obj);
 488 }
 489
 490 static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
 491 {
 492         return radeon_fence_signaled((struct radeon_fence *)sync_obj);
 493 }
 494
 495 static struct ttm_bo_driver radeon_bo_driver = {
 496         .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
 497         .invalidate_caches = &radeon_invalidate_caches,
 498         .init_mem_type = &radeon_init_mem_type,
 499         .evict_flags = &radeon_evict_flags,
 500         .move = &radeon_bo_move,
 501         .verify_access = &radeon_verify_access,
 502         .sync_obj_signaled = &radeon_sync_obj_signaled,
 503         .sync_obj_wait = &radeon_sync_obj_wait,
 504         .sync_obj_flush = &radeon_sync_obj_flush,
 505         .sync_obj_unref = &radeon_sync_obj_unref,
 506         .sync_obj_ref = &radeon_sync_obj_ref,
 507         .move_notify = &radeon_bo_move_notify,
 508         .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
 509         .io_mem_reserve = &radeon_ttm_io_mem_reserve,
 510         .io_mem_free = &radeon_ttm_io_mem_free,
 511 };
 512
 513 int radeon_ttm_init(struct radeon_device *rdev)
 514 {
 515         int r;
 516
 517         r = radeon_ttm_global_init(rdev);
 518         if (r) {
 519                 return r;
 520         }
 521         /* No others user of address space so set it to 0 */
 522         r = ttm_bo_device_init(&rdev->mman.bdev,
 523                                rdev->mman.bo_global_ref.ref.object,
 524                                &radeon_bo_driver, DRM_FILE_PAGE_OFFSET,
 525                                rdev->need_dma32);
 526         if (r) {
 527                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 528                 return r;
 529         }
 530         rdev->mman.initialized = true;
 531         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
 532                                 rdev->mc.real_vram_size >> PAGE_SHIFT);
 533         if (r) {
 534                 DRM_ERROR("Failed initializing VRAM heap.\n");
 535                 return r;
 536         }
 537         r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
 538                                 RADEON_GEM_DOMAIN_VRAM,
 539                                 &rdev->stollen_vga_memory);
 540         if (r) {
 541                 return r;
 542         }
 543         r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 544         if (r)
 545                 return r;
 546         r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
 547         radeon_bo_unreserve(rdev->stollen_vga_memory);
 548         if (r) {
 549                 radeon_bo_unref(&rdev->stollen_vga_memory);
 550                 return r;
 551         }
 552         DRM_INFO("radeon: %uM of VRAM memory ready\n",
 553                  (unsigned)rdev->mc.real_vram_size / (1024 * 1024));
 554         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
 555                                 rdev->mc.gtt_size >> PAGE_SHIFT);
 556         if (r) {
 557                 DRM_ERROR("Failed initializing GTT heap.\n");
 558                 return r;
 559         }
 560         DRM_INFO("radeon: %uM of GTT memory ready.\n",
 561                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
 562         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 563                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 564         }
 565
 566         r = radeon_ttm_debugfs_init(rdev);
 567         if (r) {
 568                 DRM_ERROR("Failed to init debugfs\n");
 569                 return r;
 570         }
 571         return 0;
 572 }
 573
 574 void radeon_ttm_fini(struct radeon_device *rdev)
 575 {
 576         int r;
 577
 578         if (!rdev->mman.initialized)
 579                 return;
 580         if (rdev->stollen_vga_memory) {
 581                 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 582                 if (r == 0) {
 583                         radeon_bo_unpin(rdev->stollen_vga_memory);
 584                         radeon_bo_unreserve(rdev->stollen_vga_memory);
 585                 }
 586                 radeon_bo_unref(&rdev->stollen_vga_memory);
 587         }
 588         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 589         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
 590         ttm_bo_device_release(&rdev->mman.bdev);
 591         radeon_gart_fini(rdev);
 592         radeon_ttm_global_fini(rdev);
 593         rdev->mman.initialized = false;
 594         DRM_INFO("radeon: ttm finalized\n");
 595 }
 596
 597 /* this should only be called at bootup or when userspace
 598  * isn't running */
 599 void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
 600 {
 601         struct ttm_mem_type_manager *man;
 602
 603         if (!rdev->mman.initialized)
 604                 return;
 605
 606         man = &rdev->mman.bdev.man[TTM_PL_VRAM];
 607         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
 608         man->size = size >> PAGE_SHIFT;
 609 }
 610
 611 static struct vm_operations_struct radeon_ttm_vm_ops;
 612 static const struct vm_operations_struct *ttm_vm_ops = NULL;
 613
 614 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 615 {
 616         struct ttm_buffer_object *bo;
 617         struct radeon_device *rdev;
 618         int r;
 619
 620         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 621         if (bo == NULL) {
 622                 return VM_FAULT_NOPAGE;
 623         }
 624         rdev = radeon_get_rdev(bo->bdev);
 625         mutex_lock(&rdev->vram_mutex);
 626         r = ttm_vm_ops->fault(vma, vmf);
 627         mutex_unlock(&rdev->vram_mutex);
 628         return r;
 629 }
 630
 631 int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
 632 {
 633         struct drm_file *file_priv;
 634         struct radeon_device *rdev;
 635         int r;
 636
 637         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 638                 return drm_mmap(filp, vma);
 639         }
 640
 641         file_priv = filp->private_data;
 642         rdev = file_priv->minor->dev->dev_private;
 643         if (rdev == NULL) {
 644                 return -EINVAL;
 645         }
 646         r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
 647         if (unlikely(r != 0)) {
 648                 return r;
 649         }
 650         if (unlikely(ttm_vm_ops == NULL)) {
 651                 ttm_vm_ops = vma->vm_ops;
 652                 radeon_ttm_vm_ops = *ttm_vm_ops;
 653                 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
 654         }
 655         vma->vm_ops = &radeon_ttm_vm_ops;
 656         return 0;
 657 }
 658
 659
 660 /*
 661  * TTM backend functions.
 662  */
 663 struct radeon_ttm_backend {
 664         struct ttm_backend              backend;
 665         struct radeon_device            *rdev;
 666         unsigned long                   num_pages;
 667         struct page                     **pages;
 668         struct page                     *dummy_read_page;
 669         dma_addr_t                      *dma_addrs;
 670         bool                            populated;
 671         bool                            bound;
 672         unsigned                        offset;
 673 };
 674
 675 static int radeon_ttm_backend_populate(struct ttm_backend *backend,
 676                                        unsigned long num_pages,
 677                                        struct page **pages,
 678                                        struct page *dummy_read_page,
 679                                        dma_addr_t *dma_addrs)
 680 {
 681         struct radeon_ttm_backend *gtt;
 682
 683         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 684         gtt->pages = pages;
 685         gtt->dma_addrs = dma_addrs;
 686         gtt->num_pages = num_pages;
 687         gtt->dummy_read_page = dummy_read_page;
 688         gtt->populated = true;
 689         return 0;
 690 }
 691
 692 static void radeon_ttm_backend_clear(struct ttm_backend *backend)
 693 {
 694         struct radeon_ttm_backend *gtt;
 695
 696         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 697         gtt->pages = NULL;
 698         gtt->dma_addrs = NULL;
 699         gtt->num_pages = 0;
 700         gtt->dummy_read_page = NULL;
 701         gtt->populated = false;
 702         gtt->bound = false;
 703 }
 704
 705
 706 static int radeon_ttm_backend_bind(struct ttm_backend *backend,
 707                                    struct ttm_mem_reg *bo_mem)
 708 {
 709         struct radeon_ttm_backend *gtt;
 710         int r;
 711
 712         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 713         gtt->offset = bo_mem->start << PAGE_SHIFT;
 714         if (!gtt->num_pages) {
 715                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 716                      gtt->num_pages, bo_mem, backend);
 717         }
 718         r = radeon_gart_bind(gtt->rdev, gtt->offset,
 719                              gtt->num_pages, gtt->pages, gtt->dma_addrs);
 720         if (r) {
 721                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 722                           gtt->num_pages, gtt->offset);
 723                 return r;
 724         }
 725         gtt->bound = true;
 726         return 0;
 727 }
 728
 729 static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
 730 {
 731         struct radeon_ttm_backend *gtt;
 732
 733         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 734         radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
 735         gtt->bound = false;
 736         return 0;
 737 }
 738
 739 static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
 740 {
 741         struct radeon_ttm_backend *gtt;
 742
 743         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 744         if (gtt->bound) {
 745                 radeon_ttm_backend_unbind(backend);
 746         }
 747         kfree(gtt);
 748 }
 749
 750 static struct ttm_backend_func radeon_backend_func = {
 751         .populate = &radeon_ttm_backend_populate,
 752         .clear = &radeon_ttm_backend_clear,
 753         .bind = &radeon_ttm_backend_bind,
 754         .unbind = &radeon_ttm_backend_unbind,
 755         .destroy = &radeon_ttm_backend_destroy,
 756 };
 757
 758 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
 759 {
 760         struct radeon_ttm_backend *gtt;
 761
 762         gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
 763         if (gtt == NULL) {
 764                 return NULL;
 765         }
 766         gtt->backend.bdev = &rdev->mman.bdev;
 767         gtt->backend.flags = 0;
 768         gtt->backend.func = &radeon_backend_func;
 769         gtt->rdev = rdev;
 770         gtt->pages = NULL;
 771         gtt->num_pages = 0;
 772         gtt->dummy_read_page = NULL;
 773         gtt->populated = false;
 774         gtt->bound = false;
 775         return &gtt->backend;
 776 }
 777
 778 #define RADEON_DEBUGFS_MEM_TYPES 2
 779
 780 #if defined(CONFIG_DEBUG_FS)
 781 static int radeon_mm_dump_table(struct seq_file *m, void *data)
 782 {
 783         struct drm_info_node *node = (struct drm_info_node *)m->private;
 784         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 785         struct drm_device *dev = node->minor->dev;
 786         struct radeon_device *rdev = dev->dev_private;
 787         int ret;
 788         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 789
 790         spin_lock(&glob->lru_lock);
 791         ret = drm_mm_dump_table(m, mm);
 792         spin_unlock(&glob->lru_lock);
 793         return ret;
 794 }
 795 #endif
 796
 797 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
 798 {
 799 #if defined(CONFIG_DEBUG_FS)
 800         static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+1];
 801         static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+1][32];
 802         unsigned i;
 803
 804         for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
 805                 if (i == 0)
 806                         sprintf(radeon_mem_types_names[i], "radeon_vram_mm");
 807                 else
 808                         sprintf(radeon_mem_types_names[i], "radeon_gtt_mm");
 809                 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 810                 radeon_mem_types_list[i].show = &radeon_mm_dump_table;
 811                 radeon_mem_types_list[i].driver_features = 0;
 812                 if (i == 0)
 813                         radeon_mem_types_list[i].data = rdev->mman.bdev.man[TTM_PL_VRAM].priv;
 814                 else
 815                         radeon_mem_types_list[i].data = rdev->mman.bdev.man[TTM_PL_TT].priv;
 816
 817         }
 818         /* Add ttm page pool to debugfs */
 819         sprintf(radeon_mem_types_names[i], "ttm_page_pool");
 820         radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 821         radeon_mem_types_list[i].show = &ttm_page_alloc_debugfs;
 822         radeon_mem_types_list[i].driver_features = 0;
 823         radeon_mem_types_list[i].data = NULL;
 824         return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES+1);
 825
 826 #endif
 827         return 0;
 828 }