drivers/gpu/drm/amd/amdgpu/amdgpu_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 <[email protected]>
  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/amdgpu_drm.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/slab.h>
  41 #include <linux/swiotlb.h>
  42 #include <linux/swap.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/debugfs.h>
  45 #include "amdgpu.h"
  46 #include "bif/bif_4_1_d.h"
  47
  48 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
  49
  50 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
  51 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev);
  52
  53 static struct amdgpu_device *amdgpu_get_adev(struct ttm_bo_device *bdev)
  54 {
  55         struct amdgpu_mman *mman;
  56         struct amdgpu_device *adev;
  57
  58         mman = container_of(bdev, struct amdgpu_mman, bdev);
  59         adev = container_of(mman, struct amdgpu_device, mman);
  60         return adev;
  61 }
  62
  63
  64 /*
  65  * Global memory.
  66  */
  67 static int amdgpu_ttm_mem_global_init(struct drm_global_reference *ref)
  68 {
  69         return ttm_mem_global_init(ref->object);
  70 }
  71
  72 static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
  73 {
  74         ttm_mem_global_release(ref->object);
  75 }
  76
  77 static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
  78 {
  79         struct drm_global_reference *global_ref;
  80         struct amdgpu_ring *ring;
  81         struct amd_sched_rq *rq;
  82         int r;
  83
  84         adev->mman.mem_global_referenced = false;
  85         global_ref = &adev->mman.mem_global_ref;
  86         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  87         global_ref->size = sizeof(struct ttm_mem_global);
  88         global_ref->init = &amdgpu_ttm_mem_global_init;
  89         global_ref->release = &amdgpu_ttm_mem_global_release;
  90         r = drm_global_item_ref(global_ref);
  91         if (r != 0) {
  92                 DRM_ERROR("Failed setting up TTM memory accounting "
  93                           "subsystem.\n");
  94                 return r;
  95         }
  96
  97         adev->mman.bo_global_ref.mem_glob =
  98                 adev->mman.mem_global_ref.object;
  99         global_ref = &adev->mman.bo_global_ref.ref;
 100         global_ref->global_type = DRM_GLOBAL_TTM_BO;
 101         global_ref->size = sizeof(struct ttm_bo_global);
 102         global_ref->init = &ttm_bo_global_init;
 103         global_ref->release = &ttm_bo_global_release;
 104         r = drm_global_item_ref(global_ref);
 105         if (r != 0) {
 106                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
 107                 drm_global_item_unref(&adev->mman.mem_global_ref);
 108                 return r;
 109         }
 110
 111         ring = adev->mman.buffer_funcs_ring;
 112         rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_KERNEL];
 113         r = amd_sched_entity_init(&ring->sched, &adev->mman.entity,
 114                                   rq, amdgpu_sched_jobs);
 115         if (r != 0) {
 116                 DRM_ERROR("Failed setting up TTM BO move run queue.\n");
 117                 drm_global_item_unref(&adev->mman.mem_global_ref);
 118                 drm_global_item_unref(&adev->mman.bo_global_ref.ref);
 119                 return r;
 120         }
 121
 122         adev->mman.mem_global_referenced = true;
 123
 124         return 0;
 125 }
 126
 127 static void amdgpu_ttm_global_fini(struct amdgpu_device *adev)
 128 {
 129         if (adev->mman.mem_global_referenced) {
 130                 amd_sched_entity_fini(adev->mman.entity.sched,
 131                                       &adev->mman.entity);
 132                 drm_global_item_unref(&adev->mman.bo_global_ref.ref);
 133                 drm_global_item_unref(&adev->mman.mem_global_ref);
 134                 adev->mman.mem_global_referenced = false;
 135         }
 136 }
 137
 138 static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 139 {
 140         return 0;
 141 }
 142
 143 static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 144                                 struct ttm_mem_type_manager *man)
 145 {
 146         struct amdgpu_device *adev;
 147
 148         adev = amdgpu_get_adev(bdev);
 149
 150         switch (type) {
 151         case TTM_PL_SYSTEM:
 152                 /* System memory */
 153                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 154                 man->available_caching = TTM_PL_MASK_CACHING;
 155                 man->default_caching = TTM_PL_FLAG_CACHED;
 156                 break;
 157         case TTM_PL_TT:
 158                 man->func = &ttm_bo_manager_func;
 159                 man->gpu_offset = adev->mc.gtt_start;
 160                 man->available_caching = TTM_PL_MASK_CACHING;
 161                 man->default_caching = TTM_PL_FLAG_CACHED;
 162                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 163                 break;
 164         case TTM_PL_VRAM:
 165                 /* "On-card" video ram */
 166                 man->func = &ttm_bo_manager_func;
 167                 man->gpu_offset = adev->mc.vram_start;
 168                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 169                              TTM_MEMTYPE_FLAG_MAPPABLE;
 170                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 171                 man->default_caching = TTM_PL_FLAG_WC;
 172                 break;
 173         case AMDGPU_PL_GDS:
 174         case AMDGPU_PL_GWS:
 175         case AMDGPU_PL_OA:
 176                 /* On-chip GDS memory*/
 177                 man->func = &ttm_bo_manager_func;
 178                 man->gpu_offset = 0;
 179                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_CMA;
 180                 man->available_caching = TTM_PL_FLAG_UNCACHED;
 181                 man->default_caching = TTM_PL_FLAG_UNCACHED;
 182                 break;
 183         default:
 184                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 185                 return -EINVAL;
 186         }
 187         return 0;
 188 }
 189
 190 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 191                                 struct ttm_placement *placement)
 192 {
 193         struct amdgpu_bo *rbo;
 194         static struct ttm_place placements = {
 195                 .fpfn = 0,
 196                 .lpfn = 0,
 197                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 198         };
 199
 200         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo)) {
 201                 placement->placement = &placements;
 202                 placement->busy_placement = &placements;
 203                 placement->num_placement = 1;
 204                 placement->num_busy_placement = 1;
 205                 return;
 206         }
 207         rbo = container_of(bo, struct amdgpu_bo, tbo);
 208         switch (bo->mem.mem_type) {
 209         case TTM_PL_VRAM:
 210                 if (rbo->adev->mman.buffer_funcs_ring->ready == false)
 211                         amdgpu_ttm_placement_from_domain(rbo, AMDGPU_GEM_DOMAIN_CPU);
 212                 else
 213                         amdgpu_ttm_placement_from_domain(rbo, AMDGPU_GEM_DOMAIN_GTT);
 214                 break;
 215         case TTM_PL_TT:
 216         default:
 217                 amdgpu_ttm_placement_from_domain(rbo, AMDGPU_GEM_DOMAIN_CPU);
 218         }
 219         *placement = rbo->placement;
 220 }
 221
 222 static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 223 {
 224         struct amdgpu_bo *rbo = container_of(bo, struct amdgpu_bo, tbo);
 225
 226         if (amdgpu_ttm_tt_get_usermm(bo->ttm))
 227                 return -EPERM;
 228         return drm_vma_node_verify_access(&rbo->gem_base.vma_node, filp);
 229 }
 230
 231 static void amdgpu_move_null(struct ttm_buffer_object *bo,
 232                              struct ttm_mem_reg *new_mem)
 233 {
 234         struct ttm_mem_reg *old_mem = &bo->mem;
 235
 236         BUG_ON(old_mem->mm_node != NULL);
 237         *old_mem = *new_mem;
 238         new_mem->mm_node = NULL;
 239 }
 240
 241 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 242                         bool evict, bool no_wait_gpu,
 243                         struct ttm_mem_reg *new_mem,
 244                         struct ttm_mem_reg *old_mem)
 245 {
 246         struct amdgpu_device *adev;
 247         struct amdgpu_ring *ring;
 248         uint64_t old_start, new_start;
 249         struct fence *fence;
 250         int r;
 251
 252         adev = amdgpu_get_adev(bo->bdev);
 253         ring = adev->mman.buffer_funcs_ring;
 254         old_start = (u64)old_mem->start << PAGE_SHIFT;
 255         new_start = (u64)new_mem->start << PAGE_SHIFT;
 256
 257         switch (old_mem->mem_type) {
 258         case TTM_PL_VRAM:
 259                 old_start += adev->mc.vram_start;
 260                 break;
 261         case TTM_PL_TT:
 262                 old_start += adev->mc.gtt_start;
 263                 break;
 264         default:
 265                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 266                 return -EINVAL;
 267         }
 268         switch (new_mem->mem_type) {
 269         case TTM_PL_VRAM:
 270                 new_start += adev->mc.vram_start;
 271                 break;
 272         case TTM_PL_TT:
 273                 new_start += adev->mc.gtt_start;
 274                 break;
 275         default:
 276                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 277                 return -EINVAL;
 278         }
 279         if (!ring->ready) {
 280                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 281                 return -EINVAL;
 282         }
 283
 284         BUILD_BUG_ON((PAGE_SIZE % AMDGPU_GPU_PAGE_SIZE) != 0);
 285
 286         r = amdgpu_copy_buffer(ring, old_start, new_start,
 287                                new_mem->num_pages * PAGE_SIZE, /* bytes */
 288                                bo->resv, &fence);
 289         if (r)
 290                 return r;
 291
 292         r = ttm_bo_pipeline_move(bo, fence, evict, new_mem);
 293         fence_put(fence);
 294         return r;
 295 }
 296
 297 static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo,
 298                                 bool evict, bool interruptible,
 299                                 bool no_wait_gpu,
 300                                 struct ttm_mem_reg *new_mem)
 301 {
 302         struct amdgpu_device *adev;
 303         struct ttm_mem_reg *old_mem = &bo->mem;
 304         struct ttm_mem_reg tmp_mem;
 305         struct ttm_place placements;
 306         struct ttm_placement placement;
 307         int r;
 308
 309         adev = amdgpu_get_adev(bo->bdev);
 310         tmp_mem = *new_mem;
 311         tmp_mem.mm_node = NULL;
 312         placement.num_placement = 1;
 313         placement.placement = &placements;
 314         placement.num_busy_placement = 1;
 315         placement.busy_placement = &placements;
 316         placements.fpfn = 0;
 317         placements.lpfn = 0;
 318         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 319         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 320                              interruptible, no_wait_gpu);
 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 = amdgpu_move_blit(bo, true, no_wait_gpu, &tmp_mem, old_mem);
 335         if (unlikely(r)) {
 336                 goto out_cleanup;
 337         }
 338         r = ttm_bo_move_ttm(bo, true, interruptible, no_wait_gpu, new_mem);
 339 out_cleanup:
 340         ttm_bo_mem_put(bo, &tmp_mem);
 341         return r;
 342 }
 343
 344 static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo,
 345                                 bool evict, bool interruptible,
 346                                 bool no_wait_gpu,
 347                                 struct ttm_mem_reg *new_mem)
 348 {
 349         struct amdgpu_device *adev;
 350         struct ttm_mem_reg *old_mem = &bo->mem;
 351         struct ttm_mem_reg tmp_mem;
 352         struct ttm_placement placement;
 353         struct ttm_place placements;
 354         int r;
 355
 356         adev = amdgpu_get_adev(bo->bdev);
 357         tmp_mem = *new_mem;
 358         tmp_mem.mm_node = NULL;
 359         placement.num_placement = 1;
 360         placement.placement = &placements;
 361         placement.num_busy_placement = 1;
 362         placement.busy_placement = &placements;
 363         placements.fpfn = 0;
 364         placements.lpfn = 0;
 365         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 366         r = ttm_bo_mem_space(bo, &placement, &tmp_mem,
 367                              interruptible, no_wait_gpu);
 368         if (unlikely(r)) {
 369                 return r;
 370         }
 371         r = ttm_bo_move_ttm(bo, true, interruptible, no_wait_gpu, &tmp_mem);
 372         if (unlikely(r)) {
 373                 goto out_cleanup;
 374         }
 375         r = amdgpu_move_blit(bo, true, no_wait_gpu, new_mem, old_mem);
 376         if (unlikely(r)) {
 377                 goto out_cleanup;
 378         }
 379 out_cleanup:
 380         ttm_bo_mem_put(bo, &tmp_mem);
 381         return r;
 382 }
 383
 384 static int amdgpu_bo_move(struct ttm_buffer_object *bo,
 385                         bool evict, bool interruptible,
 386                         bool no_wait_gpu,
 387                         struct ttm_mem_reg *new_mem)
 388 {
 389         struct amdgpu_device *adev;
 390         struct amdgpu_bo *abo;
 391         struct ttm_mem_reg *old_mem = &bo->mem;
 392         int r;
 393
 394         /* Can't move a pinned BO */
 395         abo = container_of(bo, struct amdgpu_bo, tbo);
 396         if (WARN_ON_ONCE(abo->pin_count > 0))
 397                 return -EINVAL;
 398
 399         adev = amdgpu_get_adev(bo->bdev);
 400
 401         /* remember the eviction */
 402         if (evict)
 403                 atomic64_inc(&adev->num_evictions);
 404
 405         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 406                 amdgpu_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                 amdgpu_move_null(bo, new_mem);
 415                 return 0;
 416         }
 417         if (adev->mman.buffer_funcs == NULL ||
 418             adev->mman.buffer_funcs_ring == NULL ||
 419             !adev->mman.buffer_funcs_ring->ready) {
 420                 /* use memcpy */
 421                 goto memcpy;
 422         }
 423
 424         if (old_mem->mem_type == TTM_PL_VRAM &&
 425             new_mem->mem_type == TTM_PL_SYSTEM) {
 426                 r = amdgpu_move_vram_ram(bo, evict, interruptible,
 427                                         no_wait_gpu, new_mem);
 428         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 429                    new_mem->mem_type == TTM_PL_VRAM) {
 430                 r = amdgpu_move_ram_vram(bo, evict, interruptible,
 431                                             no_wait_gpu, new_mem);
 432         } else {
 433                 r = amdgpu_move_blit(bo, evict, no_wait_gpu, new_mem, old_mem);
 434         }
 435
 436         if (r) {
 437 memcpy:
 438                 r = ttm_bo_move_memcpy(bo, evict, interruptible,
 439                                        no_wait_gpu, new_mem);
 440                 if (r) {
 441                         return r;
 442                 }
 443         }
 444
 445         /* update statistics */
 446         atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved);
 447         return 0;
 448 }
 449
 450 static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 451 {
 452         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 453         struct amdgpu_device *adev = amdgpu_get_adev(bdev);
 454
 455         mem->bus.addr = NULL;
 456         mem->bus.offset = 0;
 457         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 458         mem->bus.base = 0;
 459         mem->bus.is_iomem = false;
 460         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 461                 return -EINVAL;
 462         switch (mem->mem_type) {
 463         case TTM_PL_SYSTEM:
 464                 /* system memory */
 465                 return 0;
 466         case TTM_PL_TT:
 467                 break;
 468         case TTM_PL_VRAM:
 469                 mem->bus.offset = mem->start << PAGE_SHIFT;
 470                 /* check if it's visible */
 471                 if ((mem->bus.offset + mem->bus.size) > adev->mc.visible_vram_size)
 472                         return -EINVAL;
 473                 mem->bus.base = adev->mc.aper_base;
 474                 mem->bus.is_iomem = true;
 475 #ifdef __alpha__
 476                 /*
 477                  * Alpha: use bus.addr to hold the ioremap() return,
 478                  * so we can modify bus.base below.
 479                  */
 480                 if (mem->placement & TTM_PL_FLAG_WC)
 481                         mem->bus.addr =
 482                                 ioremap_wc(mem->bus.base + mem->bus.offset,
 483                                            mem->bus.size);
 484                 else
 485                         mem->bus.addr =
 486                                 ioremap_nocache(mem->bus.base + mem->bus.offset,
 487                                                 mem->bus.size);
 488
 489                 /*
 490                  * Alpha: Use just the bus offset plus
 491                  * the hose/domain memory base for bus.base.
 492                  * It then can be used to build PTEs for VRAM
 493                  * access, as done in ttm_bo_vm_fault().
 494                  */
 495                 mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +
 496                         adev->ddev->hose->dense_mem_base;
 497 #endif
 498                 break;
 499         default:
 500                 return -EINVAL;
 501         }
 502         return 0;
 503 }
 504
 505 static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 506 {
 507 }
 508
 509 /*
 510  * TTM backend functions.
 511  */
 512 struct amdgpu_ttm_gup_task_list {
 513         struct list_head        list;
 514         struct task_struct      *task;
 515 };
 516
 517 struct amdgpu_ttm_tt {
 518         struct ttm_dma_tt       ttm;
 519         struct amdgpu_device    *adev;
 520         u64                     offset;
 521         uint64_t                userptr;
 522         struct mm_struct        *usermm;
 523         uint32_t                userflags;
 524         spinlock_t              guptasklock;
 525         struct list_head        guptasks;
 526         atomic_t                mmu_invalidations;
 527 };
 528
 529 int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
 530 {
 531         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 532         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 533         unsigned pinned = 0;
 534         int r;
 535
 536         if (gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) {
 537                 /* check that we only use anonymous memory
 538                    to prevent problems with writeback */
 539                 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
 540                 struct vm_area_struct *vma;
 541
 542                 vma = find_vma(gtt->usermm, gtt->userptr);
 543                 if (!vma || vma->vm_file || vma->vm_end < end)
 544                         return -EPERM;
 545         }
 546
 547         do {
 548                 unsigned num_pages = ttm->num_pages - pinned;
 549                 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
 550                 struct page **p = pages + pinned;
 551                 struct amdgpu_ttm_gup_task_list guptask;
 552
 553                 guptask.task = current;
 554                 spin_lock(&gtt->guptasklock);
 555                 list_add(&guptask.list, &gtt->guptasks);
 556                 spin_unlock(&gtt->guptasklock);
 557
 558                 r = get_user_pages(userptr, num_pages, write, 0, p, NULL);
 559
 560                 spin_lock(&gtt->guptasklock);
 561                 list_del(&guptask.list);
 562                 spin_unlock(&gtt->guptasklock);
 563
 564                 if (r < 0)
 565                         goto release_pages;
 566
 567                 pinned += r;
 568
 569         } while (pinned < ttm->num_pages);
 570
 571         return 0;
 572
 573 release_pages:
 574         release_pages(pages, pinned, 0);
 575         return r;
 576 }
 577
 578 /* prepare the sg table with the user pages */
 579 static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
 580 {
 581         struct amdgpu_device *adev = amdgpu_get_adev(ttm->bdev);
 582         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 583         unsigned nents;
 584         int r;
 585
 586         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 587         enum dma_data_direction direction = write ?
 588                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 589
 590         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 591                                       ttm->num_pages << PAGE_SHIFT,
 592                                       GFP_KERNEL);
 593         if (r)
 594                 goto release_sg;
 595
 596         r = -ENOMEM;
 597         nents = dma_map_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 598         if (nents != ttm->sg->nents)
 599                 goto release_sg;
 600
 601         drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
 602                                          gtt->ttm.dma_address, ttm->num_pages);
 603
 604         return 0;
 605
 606 release_sg:
 607         kfree(ttm->sg);
 608         return r;
 609 }
 610
 611 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
 612 {
 613         struct amdgpu_device *adev = amdgpu_get_adev(ttm->bdev);
 614         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 615         struct sg_page_iter sg_iter;
 616
 617         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 618         enum dma_data_direction direction = write ?
 619                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 620
 621         /* double check that we don't free the table twice */
 622         if (!ttm->sg->sgl)
 623                 return;
 624
 625         /* free the sg table and pages again */
 626         dma_unmap_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 627
 628         for_each_sg_page(ttm->sg->sgl, &sg_iter, ttm->sg->nents, 0) {
 629                 struct page *page = sg_page_iter_page(&sg_iter);
 630                 if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
 631                         set_page_dirty(page);
 632
 633                 mark_page_accessed(page);
 634                 put_page(page);
 635         }
 636
 637         sg_free_table(ttm->sg);
 638 }
 639
 640 static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
 641                                    struct ttm_mem_reg *bo_mem)
 642 {
 643         struct amdgpu_ttm_tt *gtt = (void*)ttm;
 644         uint32_t flags = amdgpu_ttm_tt_pte_flags(gtt->adev, ttm, bo_mem);
 645         int r;
 646
 647         if (gtt->userptr) {
 648                 r = amdgpu_ttm_tt_pin_userptr(ttm);
 649                 if (r) {
 650                         DRM_ERROR("failed to pin userptr\n");
 651                         return r;
 652                 }
 653         }
 654         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 655         if (!ttm->num_pages) {
 656                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 657                      ttm->num_pages, bo_mem, ttm);
 658         }
 659
 660         if (bo_mem->mem_type == AMDGPU_PL_GDS ||
 661             bo_mem->mem_type == AMDGPU_PL_GWS ||
 662             bo_mem->mem_type == AMDGPU_PL_OA)
 663                 return -EINVAL;
 664
 665         r = amdgpu_gart_bind(gtt->adev, gtt->offset, ttm->num_pages,
 666                 ttm->pages, gtt->ttm.dma_address, flags);
 667
 668         if (r) {
 669                 DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
 670                           ttm->num_pages, (unsigned)gtt->offset);
 671                 return r;
 672         }
 673         return 0;
 674 }
 675
 676 static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
 677 {
 678         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 679
 680         /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
 681         if (gtt->adev->gart.ready)
 682                 amdgpu_gart_unbind(gtt->adev, gtt->offset, ttm->num_pages);
 683
 684         if (gtt->userptr)
 685                 amdgpu_ttm_tt_unpin_userptr(ttm);
 686
 687         return 0;
 688 }
 689
 690 static void amdgpu_ttm_backend_destroy(struct ttm_tt *ttm)
 691 {
 692         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 693
 694         ttm_dma_tt_fini(&gtt->ttm);
 695         kfree(gtt);
 696 }
 697
 698 static struct ttm_backend_func amdgpu_backend_func = {
 699         .bind = &amdgpu_ttm_backend_bind,
 700         .unbind = &amdgpu_ttm_backend_unbind,
 701         .destroy = &amdgpu_ttm_backend_destroy,
 702 };
 703
 704 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_bo_device *bdev,
 705                                     unsigned long size, uint32_t page_flags,
 706                                     struct page *dummy_read_page)
 707 {
 708         struct amdgpu_device *adev;
 709         struct amdgpu_ttm_tt *gtt;
 710
 711         adev = amdgpu_get_adev(bdev);
 712
 713         gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
 714         if (gtt == NULL) {
 715                 return NULL;
 716         }
 717         gtt->ttm.ttm.func = &amdgpu_backend_func;
 718         gtt->adev = adev;
 719         if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
 720                 kfree(gtt);
 721                 return NULL;
 722         }
 723         return &gtt->ttm.ttm;
 724 }
 725
 726 static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm)
 727 {
 728         struct amdgpu_device *adev;
 729         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 730         unsigned i;
 731         int r;
 732         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 733
 734         if (ttm->state != tt_unpopulated)
 735                 return 0;
 736
 737         if (gtt && gtt->userptr) {
 738                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
 739                 if (!ttm->sg)
 740                         return -ENOMEM;
 741
 742                 ttm->page_flags |= TTM_PAGE_FLAG_SG;
 743                 ttm->state = tt_unbound;
 744                 return 0;
 745         }
 746
 747         if (slave && ttm->sg) {
 748                 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
 749                                                  gtt->ttm.dma_address, ttm->num_pages);
 750                 ttm->state = tt_unbound;
 751                 return 0;
 752         }
 753
 754         adev = amdgpu_get_adev(ttm->bdev);
 755
 756 #ifdef CONFIG_SWIOTLB
 757         if (swiotlb_nr_tbl()) {
 758                 return ttm_dma_populate(&gtt->ttm, adev->dev);
 759         }
 760 #endif
 761
 762         r = ttm_pool_populate(ttm);
 763         if (r) {
 764                 return r;
 765         }
 766
 767         for (i = 0; i < ttm->num_pages; i++) {
 768                 gtt->ttm.dma_address[i] = pci_map_page(adev->pdev, ttm->pages[i],
 769                                                        0, PAGE_SIZE,
 770                                                        PCI_DMA_BIDIRECTIONAL);
 771                 if (pci_dma_mapping_error(adev->pdev, gtt->ttm.dma_address[i])) {
 772                         while (i--) {
 773                                 pci_unmap_page(adev->pdev, gtt->ttm.dma_address[i],
 774                                                PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 775                                 gtt->ttm.dma_address[i] = 0;
 776                         }
 777                         ttm_pool_unpopulate(ttm);
 778                         return -EFAULT;
 779                 }
 780         }
 781         return 0;
 782 }
 783
 784 static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
 785 {
 786         struct amdgpu_device *adev;
 787         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 788         unsigned i;
 789         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 790
 791         if (gtt && gtt->userptr) {
 792                 kfree(ttm->sg);
 793                 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
 794                 return;
 795         }
 796
 797         if (slave)
 798                 return;
 799
 800         adev = amdgpu_get_adev(ttm->bdev);
 801
 802 #ifdef CONFIG_SWIOTLB
 803         if (swiotlb_nr_tbl()) {
 804                 ttm_dma_unpopulate(&gtt->ttm, adev->dev);
 805                 return;
 806         }
 807 #endif
 808
 809         for (i = 0; i < ttm->num_pages; i++) {
 810                 if (gtt->ttm.dma_address[i]) {
 811                         pci_unmap_page(adev->pdev, gtt->ttm.dma_address[i],
 812                                        PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 813                 }
 814         }
 815
 816         ttm_pool_unpopulate(ttm);
 817 }
 818
 819 int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
 820                               uint32_t flags)
 821 {
 822         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 823
 824         if (gtt == NULL)
 825                 return -EINVAL;
 826
 827         gtt->userptr = addr;
 828         gtt->usermm = current->mm;
 829         gtt->userflags = flags;
 830         spin_lock_init(&gtt->guptasklock);
 831         INIT_LIST_HEAD(&gtt->guptasks);
 832         atomic_set(&gtt->mmu_invalidations, 0);
 833
 834         return 0;
 835 }
 836
 837 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
 838 {
 839         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 840
 841         if (gtt == NULL)
 842                 return NULL;
 843
 844         return gtt->usermm;
 845 }
 846
 847 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
 848                                   unsigned long end)
 849 {
 850         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 851         struct amdgpu_ttm_gup_task_list *entry;
 852         unsigned long size;
 853
 854         if (gtt == NULL || !gtt->userptr)
 855                 return false;
 856
 857         size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
 858         if (gtt->userptr > end || gtt->userptr + size <= start)
 859                 return false;
 860
 861         spin_lock(&gtt->guptasklock);
 862         list_for_each_entry(entry, &gtt->guptasks, list) {
 863                 if (entry->task == current) {
 864                         spin_unlock(&gtt->guptasklock);
 865                         return false;
 866                 }
 867         }
 868         spin_unlock(&gtt->guptasklock);
 869
 870         atomic_inc(&gtt->mmu_invalidations);
 871
 872         return true;
 873 }
 874
 875 bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
 876                                        int *last_invalidated)
 877 {
 878         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 879         int prev_invalidated = *last_invalidated;
 880
 881         *last_invalidated = atomic_read(&gtt->mmu_invalidations);
 882         return prev_invalidated != *last_invalidated;
 883 }
 884
 885 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
 886 {
 887         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 888
 889         if (gtt == NULL)
 890                 return false;
 891
 892         return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 893 }
 894
 895 uint32_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
 896                                  struct ttm_mem_reg *mem)
 897 {
 898         uint32_t flags = 0;
 899
 900         if (mem && mem->mem_type != TTM_PL_SYSTEM)
 901                 flags |= AMDGPU_PTE_VALID;
 902
 903         if (mem && mem->mem_type == TTM_PL_TT) {
 904                 flags |= AMDGPU_PTE_SYSTEM;
 905
 906                 if (ttm->caching_state == tt_cached)
 907                         flags |= AMDGPU_PTE_SNOOPED;
 908         }
 909
 910         if (adev->asic_type >= CHIP_TONGA)
 911                 flags |= AMDGPU_PTE_EXECUTABLE;
 912
 913         flags |= AMDGPU_PTE_READABLE;
 914
 915         if (!amdgpu_ttm_tt_is_readonly(ttm))
 916                 flags |= AMDGPU_PTE_WRITEABLE;
 917
 918         return flags;
 919 }
 920
 921 static void amdgpu_ttm_lru_removal(struct ttm_buffer_object *tbo)
 922 {
 923         struct amdgpu_device *adev = amdgpu_get_adev(tbo->bdev);
 924         unsigned i, j;
 925
 926         for (i = 0; i < AMDGPU_TTM_LRU_SIZE; ++i) {
 927                 struct amdgpu_mman_lru *lru = &adev->mman.log2_size[i];
 928
 929                 for (j = 0; j < TTM_NUM_MEM_TYPES; ++j)
 930                         if (&tbo->lru == lru->lru[j])
 931                                 lru->lru[j] = tbo->lru.prev;
 932
 933                 if (&tbo->swap == lru->swap_lru)
 934                         lru->swap_lru = tbo->swap.prev;
 935         }
 936 }
 937
 938 static struct amdgpu_mman_lru *amdgpu_ttm_lru(struct ttm_buffer_object *tbo)
 939 {
 940         struct amdgpu_device *adev = amdgpu_get_adev(tbo->bdev);
 941         unsigned log2_size = min(ilog2(tbo->num_pages),
 942                                  AMDGPU_TTM_LRU_SIZE - 1);
 943
 944         return &adev->mman.log2_size[log2_size];
 945 }
 946
 947 static struct list_head *amdgpu_ttm_lru_tail(struct ttm_buffer_object *tbo)
 948 {
 949         struct amdgpu_mman_lru *lru = amdgpu_ttm_lru(tbo);
 950         struct list_head *res = lru->lru[tbo->mem.mem_type];
 951
 952         lru->lru[tbo->mem.mem_type] = &tbo->lru;
 953         while ((++lru)->lru[tbo->mem.mem_type] == res)
 954                 lru->lru[tbo->mem.mem_type] = &tbo->lru;
 955
 956         return res;
 957 }
 958
 959 static struct list_head *amdgpu_ttm_swap_lru_tail(struct ttm_buffer_object *tbo)
 960 {
 961         struct amdgpu_mman_lru *lru = amdgpu_ttm_lru(tbo);
 962         struct list_head *res = lru->swap_lru;
 963
 964         lru->swap_lru = &tbo->swap;
 965         while ((++lru)->swap_lru == res)
 966                 lru->swap_lru = &tbo->swap;
 967
 968         return res;
 969 }
 970
 971 static struct ttm_bo_driver amdgpu_bo_driver = {
 972         .ttm_tt_create = &amdgpu_ttm_tt_create,
 973         .ttm_tt_populate = &amdgpu_ttm_tt_populate,
 974         .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
 975         .invalidate_caches = &amdgpu_invalidate_caches,
 976         .init_mem_type = &amdgpu_init_mem_type,
 977         .evict_flags = &amdgpu_evict_flags,
 978         .move = &amdgpu_bo_move,
 979         .verify_access = &amdgpu_verify_access,
 980         .move_notify = &amdgpu_bo_move_notify,
 981         .fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
 982         .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
 983         .io_mem_free = &amdgpu_ttm_io_mem_free,
 984         .lru_removal = &amdgpu_ttm_lru_removal,
 985         .lru_tail = &amdgpu_ttm_lru_tail,
 986         .swap_lru_tail = &amdgpu_ttm_swap_lru_tail,
 987 };
 988
 989 int amdgpu_ttm_init(struct amdgpu_device *adev)
 990 {
 991         unsigned i, j;
 992         int r;
 993
 994         r = amdgpu_ttm_global_init(adev);
 995         if (r) {
 996                 return r;
 997         }
 998         /* No others user of address space so set it to 0 */
 999         r = ttm_bo_device_init(&adev->mman.bdev,
1000                                adev->mman.bo_global_ref.ref.object,
1001                                &amdgpu_bo_driver,
1002                                adev->ddev->anon_inode->i_mapping,
1003                                DRM_FILE_PAGE_OFFSET,
1004                                adev->need_dma32);
1005         if (r) {
1006                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1007                 return r;
1008         }
1009
1010         for (i = 0; i < AMDGPU_TTM_LRU_SIZE; ++i) {
1011                 struct amdgpu_mman_lru *lru = &adev->mman.log2_size[i];
1012
1013                 for (j = 0; j < TTM_NUM_MEM_TYPES; ++j)
1014                         lru->lru[j] = &adev->mman.bdev.man[j].lru;
1015                 lru->swap_lru = &adev->mman.bdev.glob->swap_lru;
1016         }
1017
1018         for (j = 0; j < TTM_NUM_MEM_TYPES; ++j)
1019                 adev->mman.guard.lru[j] = NULL;
1020         adev->mman.guard.swap_lru = NULL;
1021
1022         adev->mman.initialized = true;
1023         r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_VRAM,
1024                                 adev->mc.real_vram_size >> PAGE_SHIFT);
1025         if (r) {
1026                 DRM_ERROR("Failed initializing VRAM heap.\n");
1027                 return r;
1028         }
1029         /* Change the size here instead of the init above so only lpfn is affected */
1030         amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size);
1031
1032         r = amdgpu_bo_create(adev, 256 * 1024, PAGE_SIZE, true,
1033                              AMDGPU_GEM_DOMAIN_VRAM,
1034                              AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
1035                              NULL, NULL, &adev->stollen_vga_memory);
1036         if (r) {
1037                 return r;
1038         }
1039         r = amdgpu_bo_reserve(adev->stollen_vga_memory, false);
1040         if (r)
1041                 return r;
1042         r = amdgpu_bo_pin(adev->stollen_vga_memory, AMDGPU_GEM_DOMAIN_VRAM, NULL);
1043         amdgpu_bo_unreserve(adev->stollen_vga_memory);
1044         if (r) {
1045                 amdgpu_bo_unref(&adev->stollen_vga_memory);
1046                 return r;
1047         }
1048         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1049                  (unsigned) (adev->mc.real_vram_size / (1024 * 1024)));
1050         r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT,
1051                                 adev->mc.gtt_size >> PAGE_SHIFT);
1052         if (r) {
1053                 DRM_ERROR("Failed initializing GTT heap.\n");
1054                 return r;
1055         }
1056         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1057                  (unsigned)(adev->mc.gtt_size / (1024 * 1024)));
1058
1059         adev->gds.mem.total_size = adev->gds.mem.total_size << AMDGPU_GDS_SHIFT;
1060         adev->gds.mem.gfx_partition_size = adev->gds.mem.gfx_partition_size << AMDGPU_GDS_SHIFT;
1061         adev->gds.mem.cs_partition_size = adev->gds.mem.cs_partition_size << AMDGPU_GDS_SHIFT;
1062         adev->gds.gws.total_size = adev->gds.gws.total_size << AMDGPU_GWS_SHIFT;
1063         adev->gds.gws.gfx_partition_size = adev->gds.gws.gfx_partition_size << AMDGPU_GWS_SHIFT;
1064         adev->gds.gws.cs_partition_size = adev->gds.gws.cs_partition_size << AMDGPU_GWS_SHIFT;
1065         adev->gds.oa.total_size = adev->gds.oa.total_size << AMDGPU_OA_SHIFT;
1066         adev->gds.oa.gfx_partition_size = adev->gds.oa.gfx_partition_size << AMDGPU_OA_SHIFT;
1067         adev->gds.oa.cs_partition_size = adev->gds.oa.cs_partition_size << AMDGPU_OA_SHIFT;
1068         /* GDS Memory */
1069         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GDS,
1070                                 adev->gds.mem.total_size >> PAGE_SHIFT);
1071         if (r) {
1072                 DRM_ERROR("Failed initializing GDS heap.\n");
1073                 return r;
1074         }
1075
1076         /* GWS */
1077         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GWS,
1078                                 adev->gds.gws.total_size >> PAGE_SHIFT);
1079         if (r) {
1080                 DRM_ERROR("Failed initializing gws heap.\n");
1081                 return r;
1082         }
1083
1084         /* OA */
1085         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_OA,
1086                                 adev->gds.oa.total_size >> PAGE_SHIFT);
1087         if (r) {
1088                 DRM_ERROR("Failed initializing oa heap.\n");
1089                 return r;
1090         }
1091
1092         r = amdgpu_ttm_debugfs_init(adev);
1093         if (r) {
1094                 DRM_ERROR("Failed to init debugfs\n");
1095                 return r;
1096         }
1097         return 0;
1098 }
1099
1100 void amdgpu_ttm_fini(struct amdgpu_device *adev)
1101 {
1102         int r;
1103
1104         if (!adev->mman.initialized)
1105                 return;
1106         amdgpu_ttm_debugfs_fini(adev);
1107         if (adev->stollen_vga_memory) {
1108                 r = amdgpu_bo_reserve(adev->stollen_vga_memory, false);
1109                 if (r == 0) {
1110                         amdgpu_bo_unpin(adev->stollen_vga_memory);
1111                         amdgpu_bo_unreserve(adev->stollen_vga_memory);
1112                 }
1113                 amdgpu_bo_unref(&adev->stollen_vga_memory);
1114         }
1115         ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_VRAM);
1116         ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_TT);
1117         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GDS);
1118         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GWS);
1119         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_OA);
1120         ttm_bo_device_release(&adev->mman.bdev);
1121         amdgpu_gart_fini(adev);
1122         amdgpu_ttm_global_fini(adev);
1123         adev->mman.initialized = false;
1124         DRM_INFO("amdgpu: ttm finalized\n");
1125 }
1126
1127 /* this should only be called at bootup or when userspace
1128  * isn't running */
1129 void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size)
1130 {
1131         struct ttm_mem_type_manager *man;
1132
1133         if (!adev->mman.initialized)
1134                 return;
1135
1136         man = &adev->mman.bdev.man[TTM_PL_VRAM];
1137         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
1138         man->size = size >> PAGE_SHIFT;
1139 }
1140
1141 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
1142 {
1143         struct drm_file *file_priv;
1144         struct amdgpu_device *adev;
1145
1146         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
1147                 return -EINVAL;
1148
1149         file_priv = filp->private_data;
1150         adev = file_priv->minor->dev->dev_private;
1151         if (adev == NULL)
1152                 return -EINVAL;
1153
1154         return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
1155 }
1156
1157 int amdgpu_copy_buffer(struct amdgpu_ring *ring,
1158                        uint64_t src_offset,
1159                        uint64_t dst_offset,
1160                        uint32_t byte_count,
1161                        struct reservation_object *resv,
1162                        struct fence **fence)
1163 {
1164         struct amdgpu_device *adev = ring->adev;
1165         struct amdgpu_job *job;
1166
1167         uint32_t max_bytes;
1168         unsigned num_loops, num_dw;
1169         unsigned i;
1170         int r;
1171
1172         max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
1173         num_loops = DIV_ROUND_UP(byte_count, max_bytes);
1174         num_dw = num_loops * adev->mman.buffer_funcs->copy_num_dw;
1175
1176         /* for IB padding */
1177         while (num_dw & 0x7)
1178                 num_dw++;
1179
1180         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
1181         if (r)
1182                 return r;
1183
1184         if (resv) {
1185                 r = amdgpu_sync_resv(adev, &job->sync, resv,
1186                                      AMDGPU_FENCE_OWNER_UNDEFINED);
1187                 if (r) {
1188                         DRM_ERROR("sync failed (%d).\n", r);
1189                         goto error_free;
1190                 }
1191         }
1192
1193         for (i = 0; i < num_loops; i++) {
1194                 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
1195
1196                 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
1197                                         dst_offset, cur_size_in_bytes);
1198
1199                 src_offset += cur_size_in_bytes;
1200                 dst_offset += cur_size_in_bytes;
1201                 byte_count -= cur_size_in_bytes;
1202         }
1203
1204         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1205         WARN_ON(job->ibs[0].length_dw > num_dw);
1206         r = amdgpu_job_submit(job, ring, &adev->mman.entity,
1207                               AMDGPU_FENCE_OWNER_UNDEFINED, fence);
1208         if (r)
1209                 goto error_free;
1210
1211         return 0;
1212
1213 error_free:
1214         amdgpu_job_free(job);
1215         return r;
1216 }
1217
1218 #if defined(CONFIG_DEBUG_FS)
1219
1220 static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
1221 {
1222         struct drm_info_node *node = (struct drm_info_node *)m->private;
1223         unsigned ttm_pl = *(int *)node->info_ent->data;
1224         struct drm_device *dev = node->minor->dev;
1225         struct amdgpu_device *adev = dev->dev_private;
1226         struct drm_mm *mm = (struct drm_mm *)adev->mman.bdev.man[ttm_pl].priv;
1227         int ret;
1228         struct ttm_bo_global *glob = adev->mman.bdev.glob;
1229
1230         spin_lock(&glob->lru_lock);
1231         ret = drm_mm_dump_table(m, mm);
1232         spin_unlock(&glob->lru_lock);
1233         if (ttm_pl == TTM_PL_VRAM)
1234                 seq_printf(m, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
1235                            adev->mman.bdev.man[ttm_pl].size,
1236                            (u64)atomic64_read(&adev->vram_usage) >> 20,
1237                            (u64)atomic64_read(&adev->vram_vis_usage) >> 20);
1238         return ret;
1239 }
1240
1241 static int ttm_pl_vram = TTM_PL_VRAM;
1242 static int ttm_pl_tt = TTM_PL_TT;
1243
1244 static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
1245         {"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, &ttm_pl_vram},
1246         {"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, &ttm_pl_tt},
1247         {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
1248 #ifdef CONFIG_SWIOTLB
1249         {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
1250 #endif
1251 };
1252
1253 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
1254                                     size_t size, loff_t *pos)
1255 {
1256         struct amdgpu_device *adev = f->f_inode->i_private;
1257         ssize_t result = 0;
1258         int r;
1259
1260         if (size & 0x3 || *pos & 0x3)
1261                 return -EINVAL;
1262
1263         while (size) {
1264                 unsigned long flags;
1265                 uint32_t value;
1266
1267                 if (*pos >= adev->mc.mc_vram_size)
1268                         return result;
1269
1270                 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1271                 WREG32(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
1272                 WREG32(mmMM_INDEX_HI, *pos >> 31);
1273                 value = RREG32(mmMM_DATA);
1274                 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1275
1276                 r = put_user(value, (uint32_t *)buf);
1277                 if (r)
1278                         return r;
1279
1280                 result += 4;
1281                 buf += 4;
1282                 *pos += 4;
1283                 size -= 4;
1284         }
1285
1286         return result;
1287 }
1288
1289 static const struct file_operations amdgpu_ttm_vram_fops = {
1290         .owner = THIS_MODULE,
1291         .read = amdgpu_ttm_vram_read,
1292         .llseek = default_llseek
1293 };
1294
1295 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
1296
1297 static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
1298                                    size_t size, loff_t *pos)
1299 {
1300         struct amdgpu_device *adev = f->f_inode->i_private;
1301         ssize_t result = 0;
1302         int r;
1303
1304         while (size) {
1305                 loff_t p = *pos / PAGE_SIZE;
1306                 unsigned off = *pos & ~PAGE_MASK;
1307                 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
1308                 struct page *page;
1309                 void *ptr;
1310
1311                 if (p >= adev->gart.num_cpu_pages)
1312                         return result;
1313
1314                 page = adev->gart.pages[p];
1315                 if (page) {
1316                         ptr = kmap(page);
1317                         ptr += off;
1318
1319                         r = copy_to_user(buf, ptr, cur_size);
1320                         kunmap(adev->gart.pages[p]);
1321                 } else
1322                         r = clear_user(buf, cur_size);
1323
1324                 if (r)
1325                         return -EFAULT;
1326
1327                 result += cur_size;
1328                 buf += cur_size;
1329                 *pos += cur_size;
1330                 size -= cur_size;
1331         }
1332
1333         return result;
1334 }
1335
1336 static const struct file_operations amdgpu_ttm_gtt_fops = {
1337         .owner = THIS_MODULE,
1338         .read = amdgpu_ttm_gtt_read,
1339         .llseek = default_llseek
1340 };
1341
1342 #endif
1343
1344 #endif
1345
1346 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
1347 {
1348 #if defined(CONFIG_DEBUG_FS)
1349         unsigned count;
1350
1351         struct drm_minor *minor = adev->ddev->primary;
1352         struct dentry *ent, *root = minor->debugfs_root;
1353
1354         ent = debugfs_create_file("amdgpu_vram", S_IFREG | S_IRUGO, root,
1355                                   adev, &amdgpu_ttm_vram_fops);
1356         if (IS_ERR(ent))
1357                 return PTR_ERR(ent);
1358         i_size_write(ent->d_inode, adev->mc.mc_vram_size);
1359         adev->mman.vram = ent;
1360
1361 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
1362         ent = debugfs_create_file("amdgpu_gtt", S_IFREG | S_IRUGO, root,
1363                                   adev, &amdgpu_ttm_gtt_fops);
1364         if (IS_ERR(ent))
1365                 return PTR_ERR(ent);
1366         i_size_write(ent->d_inode, adev->mc.gtt_size);
1367         adev->mman.gtt = ent;
1368
1369 #endif
1370         count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
1371
1372 #ifdef CONFIG_SWIOTLB
1373         if (!swiotlb_nr_tbl())
1374                 --count;
1375 #endif
1376
1377         return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count);
1378 #else
1379
1380         return 0;
1381 #endif
1382 }
1383
1384 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
1385 {
1386 #if defined(CONFIG_DEBUG_FS)
1387
1388         debugfs_remove(adev->mman.vram);
1389         adev->mman.vram = NULL;
1390
1391 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
1392         debugfs_remove(adev->mman.gtt);
1393         adev->mman.gtt = NULL;
1394 #endif
1395
1396 #endif
1397 }