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 "radeon_reg.h"
  40 #include "radeon.h"
  41
  42 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
  43
  44 static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
  45
  46 static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
  47 {
  48         struct radeon_mman *mman;
  49         struct radeon_device *rdev;
  50
  51         mman = container_of(bdev, struct radeon_mman, bdev);
  52         rdev = container_of(mman, struct radeon_device, mman);
  53         return rdev;
  54 }
  55
  56
  57 /*
  58  * Global memory.
  59  */
  60 static int radeon_ttm_mem_global_init(struct ttm_global_reference *ref)
  61 {
  62         return ttm_mem_global_init(ref->object);
  63 }
  64
  65 static void radeon_ttm_mem_global_release(struct ttm_global_reference *ref)
  66 {
  67         ttm_mem_global_release(ref->object);
  68 }
  69
  70 static int radeon_ttm_global_init(struct radeon_device *rdev)
  71 {
  72         struct ttm_global_reference *global_ref;
  73         int r;
  74
  75         rdev->mman.mem_global_referenced = false;
  76         global_ref = &rdev->mman.mem_global_ref;
  77         global_ref->global_type = TTM_GLOBAL_TTM_MEM;
  78         global_ref->size = sizeof(struct ttm_mem_global);
  79         global_ref->init = &radeon_ttm_mem_global_init;
  80         global_ref->release = &radeon_ttm_mem_global_release;
  81         r = ttm_global_item_ref(global_ref);
  82         if (r != 0) {
  83                 DRM_ERROR("Failed setting up TTM memory accounting "
  84                           "subsystem.\n");
  85                 return r;
  86         }
  87
  88         rdev->mman.bo_global_ref.mem_glob =
  89                 rdev->mman.mem_global_ref.object;
  90         global_ref = &rdev->mman.bo_global_ref.ref;
  91         global_ref->global_type = TTM_GLOBAL_TTM_BO;
  92         global_ref->size = sizeof(struct ttm_bo_global);
  93         global_ref->init = &ttm_bo_global_init;
  94         global_ref->release = &ttm_bo_global_release;
  95         r = ttm_global_item_ref(global_ref);
  96         if (r != 0) {
  97                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
  98                 ttm_global_item_unref(&rdev->mman.mem_global_ref);
  99                 return r;
 100         }
 101
 102         rdev->mman.mem_global_referenced = true;
 103         return 0;
 104 }
 105
 106 static void radeon_ttm_global_fini(struct radeon_device *rdev)
 107 {
 108         if (rdev->mman.mem_global_referenced) {
 109                 ttm_global_item_unref(&rdev->mman.bo_global_ref.ref);
 110                 ttm_global_item_unref(&rdev->mman.mem_global_ref);
 111                 rdev->mman.mem_global_referenced = false;
 112         }
 113 }
 114
 115 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
 116
 117 static struct ttm_backend*
 118 radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
 119 {
 120         struct radeon_device *rdev;
 121
 122         rdev = radeon_get_rdev(bdev);
 123 #if __OS_HAS_AGP
 124         if (rdev->flags & RADEON_IS_AGP) {
 125                 return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
 126         } else
 127 #endif
 128         {
 129                 return radeon_ttm_backend_create(rdev);
 130         }
 131 }
 132
 133 static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 134 {
 135         return 0;
 136 }
 137
 138 static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 139                                 struct ttm_mem_type_manager *man)
 140 {
 141         struct radeon_device *rdev;
 142
 143         rdev = radeon_get_rdev(bdev);
 144
 145         switch (type) {
 146         case TTM_PL_SYSTEM:
 147                 /* System memory */
 148                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 149                 man->available_caching = TTM_PL_MASK_CACHING;
 150                 man->default_caching = TTM_PL_FLAG_CACHED;
 151                 break;
 152         case TTM_PL_TT:
 153                 man->gpu_offset = 0;
 154                 man->available_caching = TTM_PL_MASK_CACHING;
 155                 man->default_caching = TTM_PL_FLAG_CACHED;
 156                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 157 #if __OS_HAS_AGP
 158                 if (rdev->flags & RADEON_IS_AGP) {
 159                         if (!(drm_core_has_AGP(rdev->ddev) && rdev->ddev->agp)) {
 160                                 DRM_ERROR("AGP is not enabled for memory type %u\n",
 161                                           (unsigned)type);
 162                                 return -EINVAL;
 163                         }
 164                         man->io_offset = rdev->mc.agp_base;
 165                         man->io_size = rdev->mc.gtt_size;
 166                         man->io_addr = NULL;
 167                         if (!rdev->ddev->agp->cant_use_aperture)
 168                                 man->flags = TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
 169                                              TTM_MEMTYPE_FLAG_MAPPABLE;
 170                         man->available_caching = TTM_PL_FLAG_UNCACHED |
 171                                                  TTM_PL_FLAG_WC;
 172                         man->default_caching = TTM_PL_FLAG_WC;
 173                 } else
 174 #endif
 175                 {
 176                         man->io_offset = 0;
 177                         man->io_size = 0;
 178                         man->io_addr = NULL;
 179                 }
 180                 break;
 181         case TTM_PL_VRAM:
 182                 /* "On-card" video ram */
 183                 man->gpu_offset = 0;
 184                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 185                              TTM_MEMTYPE_FLAG_NEEDS_IOREMAP |
 186                              TTM_MEMTYPE_FLAG_MAPPABLE;
 187                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 188                 man->default_caching = TTM_PL_FLAG_WC;
 189                 man->io_addr = NULL;
 190                 man->io_offset = rdev->mc.aper_base;
 191                 man->io_size = rdev->mc.aper_size;
 192                 break;
 193         default:
 194                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 195                 return -EINVAL;
 196         }
 197         return 0;
 198 }
 199
 200 static uint32_t radeon_evict_flags(struct ttm_buffer_object *bo)
 201 {
 202         uint32_t cur_placement = bo->mem.placement & ~TTM_PL_MASK_MEMTYPE;
 203
 204         switch (bo->mem.mem_type) {
 205         default:
 206                 return (cur_placement & ~TTM_PL_MASK_CACHING) |
 207                         TTM_PL_FLAG_SYSTEM |
 208                         TTM_PL_FLAG_CACHED;
 209         }
 210 }
 211
 212 static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 213 {
 214         return 0;
 215 }
 216
 217 static void radeon_move_null(struct ttm_buffer_object *bo,
 218                              struct ttm_mem_reg *new_mem)
 219 {
 220         struct ttm_mem_reg *old_mem = &bo->mem;
 221
 222         BUG_ON(old_mem->mm_node != NULL);
 223         *old_mem = *new_mem;
 224         new_mem->mm_node = NULL;
 225 }
 226
 227 static int radeon_move_blit(struct ttm_buffer_object *bo,
 228                             bool evict, int no_wait,
 229                             struct ttm_mem_reg *new_mem,
 230                             struct ttm_mem_reg *old_mem)
 231 {
 232         struct radeon_device *rdev;
 233         uint64_t old_start, new_start;
 234         struct radeon_fence *fence;
 235         int r;
 236
 237         rdev = radeon_get_rdev(bo->bdev);
 238         r = radeon_fence_create(rdev, &fence);
 239         if (unlikely(r)) {
 240                 return r;
 241         }
 242         old_start = old_mem->mm_node->start << PAGE_SHIFT;
 243         new_start = new_mem->mm_node->start << PAGE_SHIFT;
 244
 245         switch (old_mem->mem_type) {
 246         case TTM_PL_VRAM:
 247                 old_start += rdev->mc.vram_location;
 248                 break;
 249         case TTM_PL_TT:
 250                 old_start += rdev->mc.gtt_location;
 251                 break;
 252         default:
 253                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 254                 return -EINVAL;
 255         }
 256         switch (new_mem->mem_type) {
 257         case TTM_PL_VRAM:
 258                 new_start += rdev->mc.vram_location;
 259                 break;
 260         case TTM_PL_TT:
 261                 new_start += rdev->mc.gtt_location;
 262                 break;
 263         default:
 264                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 265                 return -EINVAL;
 266         }
 267         if (!rdev->cp.ready) {
 268                 DRM_ERROR("Trying to move memory with CP turned off.\n");
 269                 return -EINVAL;
 270         }
 271         r = radeon_copy(rdev, old_start, new_start, new_mem->num_pages, fence);
 272         /* FIXME: handle copy error */
 273         r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
 274                                       evict, no_wait, new_mem);
 275         radeon_fence_unref(&fence);
 276         return r;
 277 }
 278
 279 static int radeon_move_vram_ram(struct ttm_buffer_object *bo,
 280                                 bool evict, bool interruptible, bool no_wait,
 281                                 struct ttm_mem_reg *new_mem)
 282 {
 283         struct radeon_device *rdev;
 284         struct ttm_mem_reg *old_mem = &bo->mem;
 285         struct ttm_mem_reg tmp_mem;
 286         uint32_t proposed_placement;
 287         int r;
 288
 289         rdev = radeon_get_rdev(bo->bdev);
 290         tmp_mem = *new_mem;
 291         tmp_mem.mm_node = NULL;
 292         proposed_placement = TTM_PL_FLAG_TT | TTM_PL_MASK_CACHING;
 293         r = ttm_bo_mem_space(bo, proposed_placement, &tmp_mem,
 294                              interruptible, no_wait);
 295         if (unlikely(r)) {
 296                 return r;
 297         }
 298         r = ttm_tt_bind(bo->ttm, &tmp_mem);
 299         if (unlikely(r)) {
 300                 goto out_cleanup;
 301         }
 302         r = radeon_move_blit(bo, true, no_wait, &tmp_mem, old_mem);
 303         if (unlikely(r)) {
 304                 goto out_cleanup;
 305         }
 306         r = ttm_bo_move_ttm(bo, true, no_wait, new_mem);
 307 out_cleanup:
 308         if (tmp_mem.mm_node) {
 309                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 310
 311                 spin_lock(&glob->lru_lock);
 312                 drm_mm_put_block(tmp_mem.mm_node);
 313                 spin_unlock(&glob->lru_lock);
 314                 return r;
 315         }
 316         return r;
 317 }
 318
 319 static int radeon_move_ram_vram(struct ttm_buffer_object *bo,
 320                                 bool evict, bool interruptible, bool no_wait,
 321                                 struct ttm_mem_reg *new_mem)
 322 {
 323         struct radeon_device *rdev;
 324         struct ttm_mem_reg *old_mem = &bo->mem;
 325         struct ttm_mem_reg tmp_mem;
 326         uint32_t proposed_flags;
 327         int r;
 328
 329         rdev = radeon_get_rdev(bo->bdev);
 330         tmp_mem = *new_mem;
 331         tmp_mem.mm_node = NULL;
 332         proposed_flags = TTM_PL_FLAG_TT | TTM_PL_MASK_CACHING;
 333         r = ttm_bo_mem_space(bo, proposed_flags, &tmp_mem,
 334                              interruptible, no_wait);
 335         if (unlikely(r)) {
 336                 return r;
 337         }
 338         r = ttm_bo_move_ttm(bo, true, no_wait, &tmp_mem);
 339         if (unlikely(r)) {
 340                 goto out_cleanup;
 341         }
 342         r = radeon_move_blit(bo, true, no_wait, new_mem, old_mem);
 343         if (unlikely(r)) {
 344                 goto out_cleanup;
 345         }
 346 out_cleanup:
 347         if (tmp_mem.mm_node) {
 348                 struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 349
 350                 spin_lock(&glob->lru_lock);
 351                 drm_mm_put_block(tmp_mem.mm_node);
 352                 spin_unlock(&glob->lru_lock);
 353                 return r;
 354         }
 355         return r;
 356 }
 357
 358 static int radeon_bo_move(struct ttm_buffer_object *bo,
 359                           bool evict, bool interruptible, bool no_wait,
 360                           struct ttm_mem_reg *new_mem)
 361 {
 362         struct radeon_device *rdev;
 363         struct ttm_mem_reg *old_mem = &bo->mem;
 364         int r;
 365
 366         rdev = radeon_get_rdev(bo->bdev);
 367         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 368                 radeon_move_null(bo, new_mem);
 369                 return 0;
 370         }
 371         if ((old_mem->mem_type == TTM_PL_TT &&
 372              new_mem->mem_type == TTM_PL_SYSTEM) ||
 373             (old_mem->mem_type == TTM_PL_SYSTEM &&
 374              new_mem->mem_type == TTM_PL_TT)) {
 375                 /* bind is enought */
 376                 radeon_move_null(bo, new_mem);
 377                 return 0;
 378         }
 379         if (!rdev->cp.ready || rdev->asic->copy == NULL) {
 380                 /* use memcpy */
 381                 goto memcpy;
 382         }
 383
 384         if (old_mem->mem_type == TTM_PL_VRAM &&
 385             new_mem->mem_type == TTM_PL_SYSTEM) {
 386                 r = radeon_move_vram_ram(bo, evict, interruptible,
 387                                             no_wait, new_mem);
 388         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 389                    new_mem->mem_type == TTM_PL_VRAM) {
 390                 r = radeon_move_ram_vram(bo, evict, interruptible,
 391                                             no_wait, new_mem);
 392         } else {
 393                 r = radeon_move_blit(bo, evict, no_wait, new_mem, old_mem);
 394         }
 395
 396         if (r) {
 397 memcpy:
 398                 r = ttm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 399         }
 400
 401         return r;
 402 }
 403
 404 const uint32_t radeon_mem_prios[] = {
 405         TTM_PL_VRAM,
 406         TTM_PL_TT,
 407         TTM_PL_SYSTEM,
 408 };
 409
 410 const uint32_t radeon_busy_prios[] = {
 411         TTM_PL_TT,
 412         TTM_PL_VRAM,
 413         TTM_PL_SYSTEM,
 414 };
 415
 416 static int radeon_sync_obj_wait(void *sync_obj, void *sync_arg,
 417                                 bool lazy, bool interruptible)
 418 {
 419         return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
 420 }
 421
 422 static int radeon_sync_obj_flush(void *sync_obj, void *sync_arg)
 423 {
 424         return 0;
 425 }
 426
 427 static void radeon_sync_obj_unref(void **sync_obj)
 428 {
 429         radeon_fence_unref((struct radeon_fence **)sync_obj);
 430 }
 431
 432 static void *radeon_sync_obj_ref(void *sync_obj)
 433 {
 434         return radeon_fence_ref((struct radeon_fence *)sync_obj);
 435 }
 436
 437 static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
 438 {
 439         return radeon_fence_signaled((struct radeon_fence *)sync_obj);
 440 }
 441
 442 static struct ttm_bo_driver radeon_bo_driver = {
 443         .mem_type_prio = radeon_mem_prios,
 444         .mem_busy_prio = radeon_busy_prios,
 445         .num_mem_type_prio = ARRAY_SIZE(radeon_mem_prios),
 446         .num_mem_busy_prio = ARRAY_SIZE(radeon_busy_prios),
 447         .create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
 448         .invalidate_caches = &radeon_invalidate_caches,
 449         .init_mem_type = &radeon_init_mem_type,
 450         .evict_flags = &radeon_evict_flags,
 451         .move = &radeon_bo_move,
 452         .verify_access = &radeon_verify_access,
 453         .sync_obj_signaled = &radeon_sync_obj_signaled,
 454         .sync_obj_wait = &radeon_sync_obj_wait,
 455         .sync_obj_flush = &radeon_sync_obj_flush,
 456         .sync_obj_unref = &radeon_sync_obj_unref,
 457         .sync_obj_ref = &radeon_sync_obj_ref,
 458         .move_notify = &radeon_bo_move_notify,
 459         .fault_reserve_notify = &radeon_bo_fault_reserve_notify,
 460 };
 461
 462 int radeon_ttm_init(struct radeon_device *rdev)
 463 {
 464         int r;
 465
 466         r = radeon_ttm_global_init(rdev);
 467         if (r) {
 468                 return r;
 469         }
 470         /* No others user of address space so set it to 0 */
 471         r = ttm_bo_device_init(&rdev->mman.bdev,
 472                                rdev->mman.bo_global_ref.ref.object,
 473                                &radeon_bo_driver, DRM_FILE_PAGE_OFFSET,
 474                                rdev->need_dma32);
 475         if (r) {
 476                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 477                 return r;
 478         }
 479         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM, 0,
 480                            ((rdev->mc.real_vram_size) >> PAGE_SHIFT));
 481         if (r) {
 482                 DRM_ERROR("Failed initializing VRAM heap.\n");
 483                 return r;
 484         }
 485         r = radeon_object_create(rdev, NULL, 256 * 1024, true,
 486                                  RADEON_GEM_DOMAIN_VRAM, false,
 487                                  &rdev->stollen_vga_memory);
 488         if (r) {
 489                 return r;
 490         }
 491         r = radeon_object_pin(rdev->stollen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
 492         if (r) {
 493                 radeon_object_unref(&rdev->stollen_vga_memory);
 494                 return r;
 495         }
 496         DRM_INFO("radeon: %uM of VRAM memory ready\n",
 497                  (unsigned)rdev->mc.real_vram_size / (1024 * 1024));
 498         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT, 0,
 499                            ((rdev->mc.gtt_size) >> PAGE_SHIFT));
 500         if (r) {
 501                 DRM_ERROR("Failed initializing GTT heap.\n");
 502                 return r;
 503         }
 504         DRM_INFO("radeon: %uM of GTT memory ready.\n",
 505                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
 506         if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
 507                 rdev->mman.bdev.dev_mapping = rdev->ddev->dev_mapping;
 508         }
 509
 510         r = radeon_ttm_debugfs_init(rdev);
 511         if (r) {
 512                 DRM_ERROR("Failed to init debugfs\n");
 513                 return r;
 514         }
 515         return 0;
 516 }
 517
 518 void radeon_ttm_fini(struct radeon_device *rdev)
 519 {
 520         if (rdev->stollen_vga_memory) {
 521                 radeon_object_unpin(rdev->stollen_vga_memory);
 522                 radeon_object_unref(&rdev->stollen_vga_memory);
 523         }
 524         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 525         ttm_bo_clean_mm(&rdev->mman.bdev, TTM_PL_TT);
 526         ttm_bo_device_release(&rdev->mman.bdev);
 527         radeon_gart_fini(rdev);
 528         radeon_ttm_global_fini(rdev);
 529         DRM_INFO("radeon: ttm finalized\n");
 530 }
 531
 532 static struct vm_operations_struct radeon_ttm_vm_ops;
 533 static const struct vm_operations_struct *ttm_vm_ops = NULL;
 534
 535 static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 536 {
 537         struct ttm_buffer_object *bo;
 538         int r;
 539
 540         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 541         if (bo == NULL) {
 542                 return VM_FAULT_NOPAGE;
 543         }
 544         r = ttm_vm_ops->fault(vma, vmf);
 545         return r;
 546 }
 547
 548 int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
 549 {
 550         struct drm_file *file_priv;
 551         struct radeon_device *rdev;
 552         int r;
 553
 554         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 555                 return drm_mmap(filp, vma);
 556         }
 557
 558         file_priv = (struct drm_file *)filp->private_data;
 559         rdev = file_priv->minor->dev->dev_private;
 560         if (rdev == NULL) {
 561                 return -EINVAL;
 562         }
 563         r = ttm_bo_mmap(filp, vma, &rdev->mman.bdev);
 564         if (unlikely(r != 0)) {
 565                 return r;
 566         }
 567         if (unlikely(ttm_vm_ops == NULL)) {
 568                 ttm_vm_ops = vma->vm_ops;
 569                 radeon_ttm_vm_ops = *ttm_vm_ops;
 570                 radeon_ttm_vm_ops.fault = &radeon_ttm_fault;
 571         }
 572         vma->vm_ops = &radeon_ttm_vm_ops;
 573         return 0;
 574 }
 575
 576
 577 /*
 578  * TTM backend functions.
 579  */
 580 struct radeon_ttm_backend {
 581         struct ttm_backend              backend;
 582         struct radeon_device            *rdev;
 583         unsigned long                   num_pages;
 584         struct page                     **pages;
 585         struct page                     *dummy_read_page;
 586         bool                            populated;
 587         bool                            bound;
 588         unsigned                        offset;
 589 };
 590
 591 static int radeon_ttm_backend_populate(struct ttm_backend *backend,
 592                                        unsigned long num_pages,
 593                                        struct page **pages,
 594                                        struct page *dummy_read_page)
 595 {
 596         struct radeon_ttm_backend *gtt;
 597
 598         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 599         gtt->pages = pages;
 600         gtt->num_pages = num_pages;
 601         gtt->dummy_read_page = dummy_read_page;
 602         gtt->populated = true;
 603         return 0;
 604 }
 605
 606 static void radeon_ttm_backend_clear(struct ttm_backend *backend)
 607 {
 608         struct radeon_ttm_backend *gtt;
 609
 610         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 611         gtt->pages = NULL;
 612         gtt->num_pages = 0;
 613         gtt->dummy_read_page = NULL;
 614         gtt->populated = false;
 615         gtt->bound = false;
 616 }
 617
 618
 619 static int radeon_ttm_backend_bind(struct ttm_backend *backend,
 620                                    struct ttm_mem_reg *bo_mem)
 621 {
 622         struct radeon_ttm_backend *gtt;
 623         int r;
 624
 625         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 626         gtt->offset = bo_mem->mm_node->start << PAGE_SHIFT;
 627         if (!gtt->num_pages) {
 628                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", gtt->num_pages, bo_mem, backend);
 629         }
 630         r = radeon_gart_bind(gtt->rdev, gtt->offset,
 631                              gtt->num_pages, gtt->pages);
 632         if (r) {
 633                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 634                           gtt->num_pages, gtt->offset);
 635                 return r;
 636         }
 637         gtt->bound = true;
 638         return 0;
 639 }
 640
 641 static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
 642 {
 643         struct radeon_ttm_backend *gtt;
 644
 645         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 646         radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
 647         gtt->bound = false;
 648         return 0;
 649 }
 650
 651 static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
 652 {
 653         struct radeon_ttm_backend *gtt;
 654
 655         gtt = container_of(backend, struct radeon_ttm_backend, backend);
 656         if (gtt->bound) {
 657                 radeon_ttm_backend_unbind(backend);
 658         }
 659         kfree(gtt);
 660 }
 661
 662 static struct ttm_backend_func radeon_backend_func = {
 663         .populate = &radeon_ttm_backend_populate,
 664         .clear = &radeon_ttm_backend_clear,
 665         .bind = &radeon_ttm_backend_bind,
 666         .unbind = &radeon_ttm_backend_unbind,
 667         .destroy = &radeon_ttm_backend_destroy,
 668 };
 669
 670 struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
 671 {
 672         struct radeon_ttm_backend *gtt;
 673
 674         gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
 675         if (gtt == NULL) {
 676                 return NULL;
 677         }
 678         gtt->backend.bdev = &rdev->mman.bdev;
 679         gtt->backend.flags = 0;
 680         gtt->backend.func = &radeon_backend_func;
 681         gtt->rdev = rdev;
 682         gtt->pages = NULL;
 683         gtt->num_pages = 0;
 684         gtt->dummy_read_page = NULL;
 685         gtt->populated = false;
 686         gtt->bound = false;
 687         return &gtt->backend;
 688 }
 689
 690 #define RADEON_DEBUGFS_MEM_TYPES 2
 691
 692 #if defined(CONFIG_DEBUG_FS)
 693 static int radeon_mm_dump_table(struct seq_file *m, void *data)
 694 {
 695         struct drm_info_node *node = (struct drm_info_node *)m->private;
 696         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 697         struct drm_device *dev = node->minor->dev;
 698         struct radeon_device *rdev = dev->dev_private;
 699         int ret;
 700         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 701
 702         spin_lock(&glob->lru_lock);
 703         ret = drm_mm_dump_table(m, mm);
 704         spin_unlock(&glob->lru_lock);
 705         return ret;
 706 }
 707 #endif
 708
 709 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
 710 {
 711 #if defined(CONFIG_DEBUG_FS)
 712         static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES];
 713         static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES][32];
 714         unsigned i;
 715
 716         for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
 717                 if (i == 0)
 718                         sprintf(radeon_mem_types_names[i], "radeon_vram_mm");
 719                 else
 720                         sprintf(radeon_mem_types_names[i], "radeon_gtt_mm");
 721                 radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 722                 radeon_mem_types_list[i].show = &radeon_mm_dump_table;
 723                 radeon_mem_types_list[i].driver_features = 0;
 724                 if (i == 0)
 725                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_VRAM].manager;
 726                 else
 727                         radeon_mem_types_list[i].data = &rdev->mman.bdev.man[TTM_PL_TT].manager;
 728
 729         }
 730         return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES);
 731
 732 #endif
 733         return 0;
 734 }