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 ttm_global_reference *ref)
  63 {
  64         return ttm_mem_global_init(ref->object);
  65 }
  66
  67 static void radeon_ttm_mem_global_release(struct ttm_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 ttm_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 = TTM_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 = ttm_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 = TTM_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 = ttm_global_item_ref(global_ref);
  98         if (r != 0) {
  99                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
 100                 ttm_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                 ttm_global_item_unref(&rdev->mman.bo_global_ref.ref);
 112                 ttm_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->gpu_offset = rdev->mc.gtt_start;
 156                 man->available_caching = TTM_PL_MASK_CACHING;
 157                 man->default_caching = TTM_PL_FLAG_CACHED;
 158                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 159 #if __OS_HAS_AGP
 160                 if (rdev->flags & RADEON_IS_AGP) {
 161                         if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
 162                                 DRM_ERROR("AGP is not enabled for memory type %u\n",
 163                                           (unsigned)type);
 164                                 return -EINVAL;
 165                         }
 166                         man->io_offset = rdev->mc.agp_base;
 167                         man->io_size = rdev->mc.gtt_size;
 168                         man->io_addr = NULL;
 169                         if (!rdev->ddev->agp->cant_use_aperture)
 170                                 man->flags = TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
 171                                              TTM_MEMTYPE_FLAG_MAPPABLE;
 172                         man->available_caching = TTM_PL_FLAG_UNCACHED |
 173                                                  TTM_PL_FLAG_WC;
 174                         man->default_caching = TTM_PL_FLAG_WC;
 175                 } else
 176 #endif
 177                 {
 178                         man->io_offset = 0;
 179                         man->io_size = 0;
 180                         man->io_addr = NULL;
 181                 }
 182                 break;
 183         case TTM_PL_VRAM:
 184                 /* "On-card" video ram */
 185                 man->gpu_offset = rdev->mc.vram_start;
 186                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 187                              TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
 188                              TTM_MEMTYPE_FLAG_MAPPABLE;
 189                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 190                 man->default_caching = TTM_PL_FLAG_WC;
 191                 man->io_addr = NULL;
 192                 man->io_offset = rdev->mc.aper_base;
 193                 man->io_size = rdev->mc.aper_size;
 194                 break;
 195         default:
 196                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 197                 return -EINVAL;
 198         }
 199         return 0;
 200 }
 201
 202 static void radeon_evict_flags(struct ttm_buffer_object *bo,
 203                                 struct ttm_placement *placement)
 204 {
 205         struct radeon_bo *rbo;
 206         static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 207
 208         if (!radeon_ttm_bo_is_radeon_bo(bo)) {
 209                 placement->fpfn = 0;
 210                 placement->lpfn = 0;
 211                 placement->placement = &placements;
 212                 placement->busy_placement = &placements;
 213                 placement->num_placement = 1;
 214                 placement->num_busy_placement = 1;
 215                 return;
 216         }
 217         rbo = container_of(bo, struct radeon_bo, tbo);
 218         switch (bo->mem.mem_type) {
 219         case TTM_PL_VRAM:
 220                 if (rbo->rdev->cp.ready == false)
 221                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 222                 else
 223                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 224                 break;
 225         case TTM_PL_TT:
 226         default:
 227                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 228         }
 229         *placement = rbo->placement;
 230 }
 231
 232 static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 233 {
 234         return 0;
 235 }
 236
 237 static void radeon_move_null(struct ttm_buffer_object *bo,
 238                              struct ttm_mem_reg *new_mem)
 239 {
 240         struct ttm_mem_reg *old_mem = &bo->mem;
 241
 242         BUG_ON(old_mem->mm_node != NULL);
 243         *old_mem = *new_mem;
 244         new_mem->mm_node = NULL;
 245 }
 246
 247 static int radeon_move_blit(struct ttm_buffer_object *bo,
 248                             bool evict, int no_wait,
 249                             struct ttm_mem_reg *new_mem,
 250                             struct ttm_mem_reg *old_mem)
 251 {
 252         struct radeon_device *rdev;
 253         uint64_t old_start, new_start;
 254         struct radeon_fence *fence;
 255         int r;
 256
 257         rdev = radeon_get_rdev(bo->bdev);
 258         r = radeon_fence_create(rdev, &fence);
 259         if (unlikely(r)) {
 260                 return r;
 261         }
 262         old_start = old_mem->mm_node->start << PAGE_SHIFT;
 263         new_start = new_mem->mm_node->start << PAGE_SHIFT;
 264
 265         switch (old_mem->mem_type) {
 266         case TTM_PL_VRAM:
 267                 old_start += rdev->mc.vram_start;
 268                 break;
 269         case TTM_PL_TT:
 270                 old_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         switch (new_mem->mem_type) {
 277         case TTM_PL_VRAM:
 278                 new_start += rdev->mc.vram_start;
 279                 break;
 280         case TTM_PL_TT:
 281                 new_start += rdev->mc.gtt_start;
 282                 break;
 283         default:
 284                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 285                 return -EINVAL;
 286         }
 287         if (!rdev->cp.ready) {
 288                 DRM_ERROR("Trying to move memory with CP turned off.\n");
 289                 return -EINVAL;
 290         }
 291         r = radeon_copy(rdev, old_start, new_start, new_mem->num_pages, fence);
 292         /* FIXME: handle copy error */
 293         r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
 294                                       evict, no_wait, new_mem);
 295         radeon_fence_unref(&fence);
 296         return r;
 297 }
 298
 299 static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
 300                                 bool evict, bool interruptible, bool no_wait,
 301                                 struct ttm_mem_reg *new_mem)
 302 {
 303         struct radeon_device *rdev;
 304         struct ttm_mem_reg *old_mem = &bo->mem;
 305         struct ttm_mem_reg tmp_mem;
 306         u32 placements;
 307         struct ttm_placement placement;
 308         int r;
 309
 310         rdev = radeon_get_rdev(bo->bdev);
 311         tmp_mem = *new_mem;
 312         tmp_mem.mm_node = NULL;
 313         placement.fpfn = 0;
 314         placement.lpfn = 0;
 315         placement.num_placement = 1;
 316         placement.placement = &placements;
 317         placement.num_busy_placement = 1;
 318         placement.busy_placement = &placements;
 319         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 320         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 321                              interruptible, no_wait);
 322         if (unlikely(r)) {
 323                 return r;
 324         }
 325
 326         r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
 327         if (unlikely(r)) {
 328                 goto out_cleanup;
 329         }
 330
 331         r = ttm_tt_bind(bo->ttm, &tmp_mem);
 332         if (unlikely(r)) {
 333                 goto out_cleanup;
 334         }
 335         r = radeon_move_blit(bo, true, no_wait, &tmp_mem, old_mem);
 336         if (unlikely(r)) {
 337                 goto out_cleanup;
 338         }
 339         r = ttm_bo_move_ttm(bo, true, no_wait, new_mem);
 340 out_cleanup:
 341         if (tmp_mem.mm_node) {
 342                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 343
 344                 spin_lock(&glob->lru_lock);
 345                 drm_mm_put_block(tmp_mem.mm_node);
 346                 spin_unlock(&glob->lru_lock);
 347                 return r;
 348         }
 349         return r;
 350 }
 351
 352 static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
 353                                 bool evict, bool interruptible, bool no_wait,
 354                                 struct ttm_mem_reg *new_mem)
 355 {
 356         struct radeon_device *rdev;
 357         struct ttm_mem_reg *old_mem = &bo->mem;
 358         struct ttm_mem_reg tmp_mem;
 359         struct ttm_placement placement;
 360         u32 placements;
 361         int r;
 362
 363         rdev = radeon_get_rdev(bo->bdev);
 364         tmp_mem = *new_mem;
 365         tmp_mem.mm_node = NULL;
 366         placement.fpfn = 0;
 367         placement.lpfn = 0;
 368         placement.num_placement = 1;
 369         placement.placement = &placements;
 370         placement.num_busy_placement = 1;
 371         placement.busy_placement = &placements;
 372         placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 373         r = ttm_bo_mem_space(bo, &placement, &tmp_mem, interruptible, no_wait);
 374         if (unlikely(r)) {
 375                 return r;
 376         }
 377         r = ttm_bo_move_ttm(bo, true, no_wait, &tmp_mem);
 378         if (unlikely(r)) {
 379                 goto out_cleanup;
 380         }
 381         r = radeon_move_blit(bo, true, no_wait, new_mem, old_mem);
 382         if (unlikely(r)) {
 383                 goto out_cleanup;
 384         }
 385 out_cleanup:
 386         if (tmp_mem.mm_node) {
 387                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 388
 389                 spin_lock(&glob->lru_lock);
 390                 drm_mm_put_block(tmp_mem.mm_node);
 391                 spin_unlock(&glob->lru_lock);
 392                 return r;
 393         }
 394         return r;
 395 }
 396
 397 static int radeon_bo_move(struct ttm_buffer_object *bo,
 398                           bool evict, bool interruptible, bool no_wait,
 399                           struct ttm_mem_reg *new_mem)
 400 {
 401         struct radeon_device *rdev;
 402         struct ttm_mem_reg *old_mem = &bo->mem;
 403         int r;
 404
 405         rdev = radeon_get_rdev(bo->bdev);
 406         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 407                 radeon_move_null(bo, new_mem);
 408                 return 0;
 409         }
 410         if ((old_mem->mem_type == TTM_PL_TT &&
 411              new_mem->mem_type == TTM_PL_SYSTEM) ||
 412             (old_mem->mem_type == TTM_PL_SYSTEM &&
 413              new_mem->mem_type == TTM_PL_TT)) {
 414                 /* bind is enough */
 415                 radeon_move_null(bo, new_mem);
 416                 return 0;
 417         }
 418         if (!rdev->cp.ready || rdev->asic->copy == NULL) {
 419                 /* use memcpy */
 420                 goto memcpy;
 421         }
 422
 423         if (old_mem->mem_type == TTM_PL_VRAM &&
 424             new_mem->mem_type == TTM_PL_SYSTEM) {
 425                 r = radeon_move_vram_ram(bo, evict, interruptible,
 426                                             no_wait, new_mem);
 427         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 428                    new_mem->mem_type == TTM_PL_VRAM) {
 429                 r = radeon_move_ram_vram(bo, evict, interruptible,
 430                                             no_wait, new_mem);
 431         } else {
 432                 r = radeon_move_blit(bo, evict, no_wait, new_mem, old_mem);
 433         }
 434
 435         if (r) {
 436 memcpy:
 437                 r = ttm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 438         }
 439
 440         return r;
 441 }
 442
 443 static int radeon_sync_obj_wait(void *sync_obj, void *sync_arg,
 444                                 bool lazy, bool interruptible)
 445 {
 446         return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
 447 }
 448
 449 static int radeon_sync_obj_flush(void *sync_obj, void *sync_arg)
 450 {
 451         return 0;
 452 }
 453
 454 static void radeon_sync_obj_unref(void **sync_obj)
 455 {
 456         radeon_fence_unref((struct radeon_fence **)sync_obj);
 457 }
 458
 459 static void *radeon_sync_obj_ref(void *sync_obj)
 460 {
 461         return radeon_fence_ref((struct radeon_fence *)sync_obj);
 462 }
 463
 464 static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
 465 {
 466         return radeon_fence_signaled((struct radeon_fence *)sync_obj);
 467 }
 468
 469 static struct ttm_bo_driver radeon_bo_driver = {
 470         .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
 471         .invalidate_caches = &radeon_invalidate_caches,
 472         .init_mem_type = &radeon_init_mem_type,
 473         .evict_flags = &radeon_evict_flags,
 474         .move = &radeon_bo_move,
 475         .verify_access = &radeon_verify_access,
 476         .sync_obj_signaled = &radeon_sync_obj_signaled,
 477         .sync_obj_wait = &radeon_sync_obj_wait,
 478         .sync_obj_flush = &radeon_sync_obj_flush,
 479         .sync_obj_unref = &radeon_sync_obj_unref,
 480         .sync_obj_ref = &radeon_sync_obj_ref,
 481         .move_notify = &radeon_bo_move_notify,
 482         .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
 483 };
 484
 485 int radeon_ttm_init(struct radeon_device *rdev)
 486 {
 487         int r;
 488
 489         r = radeon_ttm_global_init(rdev);
 490         if (r) {
 491                 return r;
 492         }
 493         /* No others user of address space so set it to 0 */
 494         r = ttm_bo_device_init(&rdev->mman.bdev,
 495                                rdev->mman.bo_global_ref.ref.object,
 496                                &radeon_bo_driver, DRM_FILE_PAGE_OFFSET,
 497                                rdev->need_dma32);
 498         if (r) {
 499                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 500                 return r;
 501         }
 502         rdev->mman.initialized = true;
 503         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM,
 504                                 rdev->mc.real_vram_size >> PAGE_SHIFT);
 505         if (r) {
 506                 DRM_ERROR("Failed initializing VRAM heap.\n");
 507                 return r;
 508         }
 509         r = radeon_bo_create(rdev, NULL, 256 * 1024, true,
 510                                 RADEON_GEM_DOMAIN_VRAM,
 511                                 &rdev->stollen_vga_memory);
 512         if (r) {
 513                 return r;
 514         }
 515         r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 516         if (r)
 517                 return r;
 518         r = radeon_bo_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
 519         radeon_bo_unreserve(rdev->stollen_vga_memory);
 520         if (r) {
 521                 radeon_bo_unref(&rdev->stollen_vga_memory);
 522                 return r;
 523         }
 524         DRM_INFO("radeon: %uM of VRAM memory ready\n",
 525                  (unsigned)rdev->mc.real_vram_size / (1024 * 1024));
 526         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT,
 527                                 rdev->mc.gtt_size >> PAGE_SHIFT);
 528         if (r) {
 529                 DRM_ERROR("Failed initializing GTT heap.\n");
 530                 return r;
 531         }
 532         DRM_INFO("radeon: %uM of GTT memory ready.\n",
 533                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
 534         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 535                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 536         }
 537
 538         r = radeon_ttm_debugfs_init(rdev);
 539         if (r) {
 540                 DRM_ERROR("Failed to init debugfs\n");
 541                 return r;
 542         }
 543         return 0;
 544 }
 545
 546 void radeon_ttm_fini(struct radeon_device *rdev)
 547 {
 548         int r;
 549
 550         if (!rdev->mman.initialized)
 551                 return;
 552         if (rdev->stollen_vga_memory) {
 553                 r = radeon_bo_reserve(rdev->stollen_vga_memory, false);
 554                 if (r == 0) {
 555                         radeon_bo_unpin(rdev->stollen_vga_memory);
 556                         radeon_bo_unreserve(rdev->stollen_vga_memory);
 557                 }
 558                 radeon_bo_unref(&rdev->stollen_vga_memory);
 559         }
 560         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 561         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
 562         ttm_bo_device_release(&rdev->mman.bdev);
 563         radeon_gart_fini(rdev);
 564         radeon_ttm_global_fini(rdev);
 565         rdev->mman.initialized = false;
 566         DRM_INFO("radeon: ttm finalized\n");
 567 }
 568
 569 static struct vm_operations_struct radeon_ttm_vm_ops;
 570 static const struct vm_operations_struct *ttm_vm_ops = NULL;
 571
 572 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 573 {
 574         struct ttm_buffer_object *bo;
 575         int r;
 576
 577         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 578         if (bo == NULL) {
 579                 return VM_FAULT_NOPAGE;
 580         }
 581         r = ttm_vm_ops->fault(vma, vmf);
 582         return r;
 583 }
 584
 585 int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
 586 {
 587         struct drm_file *file_priv;
 588         struct radeon_device *rdev;
 589         int r;
 590
 591         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 592                 return drm_mmap(filp, vma);
 593         }
 594
 595         file_priv = (struct drm_file *)filp->private_data;
 596         rdev = file_priv->minor->dev->dev_private;
 597         if (rdev == NULL) {
 598                 return -EINVAL;
 599         }
 600         r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
 601         if (unlikely(r != 0)) {
 602                 return r;
 603         }
 604         if (unlikely(ttm_vm_ops == NULL)) {
 605                 ttm_vm_ops = vma->vm_ops;
 606                 radeon_ttm_vm_ops = *ttm_vm_ops;
 607                 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
 608         }
 609         vma->vm_ops = &radeon_ttm_vm_ops;
 610         return 0;
 611 }
 612
 613
 614 /*
 615  * TTM backend functions.
 616  */
 617 struct radeon_ttm_backend {
 618         struct ttm_backend              backend;
 619         struct radeon_device            *rdev;
 620         unsigned long                   num_pages;
 621         struct page                     **pages;
 622         struct page                     *dummy_read_page;
 623         bool                            populated;
 624         bool                            bound;
 625         unsigned                        offset;
 626 };
 627
 628 static int radeon_ttm_backend_populate(struct ttm_backend *backend,
 629                                        unsigned long num_pages,
 630                                        struct page **pages,
 631                                        struct page *dummy_read_page)
 632 {
 633         struct radeon_ttm_backend *gtt;
 634
 635         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 636         gtt->pages = pages;
 637         gtt->num_pages = num_pages;
 638         gtt->dummy_read_page = dummy_read_page;
 639         gtt->populated = true;
 640         return 0;
 641 }
 642
 643 static void radeon_ttm_backend_clear(struct ttm_backend *backend)
 644 {
 645         struct radeon_ttm_backend *gtt;
 646
 647         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 648         gtt->pages = NULL;
 649         gtt->num_pages = 0;
 650         gtt->dummy_read_page = NULL;
 651         gtt->populated = false;
 652         gtt->bound = false;
 653 }
 654
 655
 656 static int radeon_ttm_backend_bind(struct ttm_backend *backend,
 657                                    struct ttm_mem_reg *bo_mem)
 658 {
 659         struct radeon_ttm_backend *gtt;
 660         int r;
 661
 662         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 663         gtt->offset = bo_mem->mm_node->start << PAGE_SHIFT;
 664         if (!gtt->num_pages) {
 665                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", gtt->num_pages, bo_mem, backend);
 666         }
 667         r = radeon_gart_bind(gtt->rdev, gtt->offset,
 668                              gtt->num_pages, gtt->pages);
 669         if (r) {
 670                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 671                           gtt->num_pages, gtt->offset);
 672                 return r;
 673         }
 674         gtt->bound = true;
 675         return 0;
 676 }
 677
 678 static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
 679 {
 680         struct radeon_ttm_backend *gtt;
 681
 682         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 683         radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
 684         gtt->bound = false;
 685         return 0;
 686 }
 687
 688 static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
 689 {
 690         struct radeon_ttm_backend *gtt;
 691
 692         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 693         if (gtt->bound) {
 694                 radeon_ttm_backend_unbind(backend);
 695         }
 696         kfree(gtt);
 697 }
 698
 699 static struct ttm_backend_func radeon_backend_func = {
 700         .populate = &radeon_ttm_backend_populate,
 701         .clear = &radeon_ttm_backend_clear,
 702         .bind = &radeon_ttm_backend_bind,
 703         .unbind = &radeon_ttm_backend_unbind,
 704         .destroy = &radeon_ttm_backend_destroy,
 705 };
 706
 707 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
 708 {
 709         struct radeon_ttm_backend *gtt;
 710
 711         gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
 712         if (gtt == NULL) {
 713                 return NULL;
 714         }
 715         gtt->backend.bdev = &rdev->mman.bdev;
 716         gtt->backend.flags = 0;
 717         gtt->backend.func = &radeon_backend_func;
 718         gtt->rdev = rdev;
 719         gtt->pages = NULL;
 720         gtt->num_pages = 0;
 721         gtt->dummy_read_page = NULL;
 722         gtt->populated = false;
 723         gtt->bound = false;
 724         return &gtt->backend;
 725 }
 726
 727 #define RADEON_DEBUGFS_MEM_TYPES 2
 728
 729 #if defined(CONFIG_DEBUG_FS)
 730 static int radeon_mm_dump_table(struct seq_file *m, void *data)
 731 {
 732         struct drm_info_node *node = (struct drm_info_node *)m->private;
 733         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 734         struct drm_device *dev = node->minor->dev;
 735         struct radeon_device *rdev = dev->dev_private;
 736         int ret;
 737         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 738
 739         spin_lock(&glob->lru_lock);
 740         ret = drm_mm_dump_table(m, mm);
 741         spin_unlock(&glob->lru_lock);
 742         return ret;
 743 }
 744 #endif
 745
 746 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
 747 {
 748 #if defined(CONFIG_DEBUG_FS)
 749         static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+1];
 750         static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+1][32];
 751         unsigned i;
 752
 753         for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
 754                 if (i == 0)
 755                         sprintf(radeon_mem_types_names[i], "radeon_vram_mm");
 756                 else
 757                         sprintf(radeon_mem_types_names[i], "radeon_gtt_mm");
 758                 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 759                 radeon_mem_types_list[i].show = &radeon_mm_dump_table;
 760                 radeon_mem_types_list[i].driver_features = 0;
 761                 if (i == 0)
 762                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_VRAM].manager;
 763                 else
 764                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_TT].manager;
 765
 766         }
 767         /* Add ttm page pool to debugfs */
 768         sprintf(radeon_mem_types_names[i], "ttm_page_pool");
 769         radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 770         radeon_mem_types_list[i].show = &ttm_page_alloc_debugfs;
 771         radeon_mem_types_list[i].driver_features = 0;
 772         radeon_mem_types_list[i].data = NULL;
 773         return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES+1);
 774
 775 #endif
 776         return 0;
 777 }