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