drivers/gpu/drm/amd/amdgpu/amdgpu_object.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 <linux/list.h>
  33 #include <linux/slab.h>
  34 #include <drm/drmP.h>
  35 #include <drm/amdgpu_drm.h>
  36 #include <drm/drm_cache.h>
  37 #include "amdgpu.h"
  38 #include "amdgpu_trace.h"
  39
  40 static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  41 {
  42         struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
  43         struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
  44
  45         amdgpu_bo_kunmap(bo);
  46
  47         drm_gem_object_release(&bo->gem_base);
  48         amdgpu_bo_unref(&bo->parent);
  49         if (!list_empty(&bo->shadow_list)) {
  50                 mutex_lock(&adev->shadow_list_lock);
  51                 list_del_init(&bo->shadow_list);
  52                 mutex_unlock(&adev->shadow_list_lock);
  53         }
  54         kfree(bo->metadata);
  55         kfree(bo);
  56 }
  57
  58 bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
  59 {
  60         if (bo->destroy == &amdgpu_ttm_bo_destroy)
  61                 return true;
  62         return false;
  63 }
  64
  65 void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
  66 {
  67         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
  68         struct ttm_placement *placement = &abo->placement;
  69         struct ttm_place *places = abo->placements;
  70         u64 flags = abo->flags;
  71         u32 c = 0;
  72
  73         if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
  74                 unsigned visible_pfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
  75
  76                 places[c].fpfn = 0;
  77                 places[c].lpfn = 0;
  78                 places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
  79                         TTM_PL_FLAG_VRAM;
  80
  81                 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
  82                         places[c].lpfn = visible_pfn;
  83                 else
  84                         places[c].flags |= TTM_PL_FLAG_TOPDOWN;
  85
  86                 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
  87                         places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
  88                 c++;
  89         }
  90
  91         if (domain & AMDGPU_GEM_DOMAIN_GTT) {
  92                 places[c].fpfn = 0;
  93                 if (flags & AMDGPU_GEM_CREATE_SHADOW)
  94                         places[c].lpfn = adev->mc.gart_size >> PAGE_SHIFT;
  95                 else
  96                         places[c].lpfn = 0;
  97                 places[c].flags = TTM_PL_FLAG_TT;
  98                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
  99                         places[c].flags |= TTM_PL_FLAG_WC |
 100                                 TTM_PL_FLAG_UNCACHED;
 101                 else
 102                         places[c].flags |= TTM_PL_FLAG_CACHED;
 103                 c++;
 104         }
 105
 106         if (domain & AMDGPU_GEM_DOMAIN_CPU) {
 107                 places[c].fpfn = 0;
 108                 places[c].lpfn = 0;
 109                 places[c].flags = TTM_PL_FLAG_SYSTEM;
 110                 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
 111                         places[c].flags |= TTM_PL_FLAG_WC |
 112                                 TTM_PL_FLAG_UNCACHED;
 113                 else
 114                         places[c].flags |= TTM_PL_FLAG_CACHED;
 115                 c++;
 116         }
 117
 118         if (domain & AMDGPU_GEM_DOMAIN_GDS) {
 119                 places[c].fpfn = 0;
 120                 places[c].lpfn = 0;
 121                 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GDS;
 122                 c++;
 123         }
 124
 125         if (domain & AMDGPU_GEM_DOMAIN_GWS) {
 126                 places[c].fpfn = 0;
 127                 places[c].lpfn = 0;
 128                 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GWS;
 129                 c++;
 130         }
 131
 132         if (domain & AMDGPU_GEM_DOMAIN_OA) {
 133                 places[c].fpfn = 0;
 134                 places[c].lpfn = 0;
 135                 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_OA;
 136                 c++;
 137         }
 138
 139         if (!c) {
 140                 places[c].fpfn = 0;
 141                 places[c].lpfn = 0;
 142                 places[c].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 143                 c++;
 144         }
 145
 146         placement->num_placement = c;
 147         placement->placement = places;
 148
 149         placement->num_busy_placement = c;
 150         placement->busy_placement = places;
 151 }
 152
 153 /**
 154  * amdgpu_bo_create_reserved - create reserved BO for kernel use
 155  *
 156  * @adev: amdgpu device object
 157  * @size: size for the new BO
 158  * @align: alignment for the new BO
 159  * @domain: where to place it
 160  * @bo_ptr: resulting BO
 161  * @gpu_addr: GPU addr of the pinned BO
 162  * @cpu_addr: optional CPU address mapping
 163  *
 164  * Allocates and pins a BO for kernel internal use, and returns it still
 165  * reserved.
 166  *
 167  * Returns 0 on success, negative error code otherwise.
 168  */
 169 int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
 170                               unsigned long size, int align,
 171                               u32 domain, struct amdgpu_bo **bo_ptr,
 172                               u64 *gpu_addr, void **cpu_addr)
 173 {
 174         bool free = false;
 175         int r;
 176
 177         if (!*bo_ptr) {
 178                 r = amdgpu_bo_create(adev, size, align, true, domain,
 179                                      AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 180                                      AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
 181                                      NULL, NULL, 0, bo_ptr);
 182                 if (r) {
 183                         dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
 184                                 r);
 185                         return r;
 186                 }
 187                 free = true;
 188         }
 189
 190         r = amdgpu_bo_reserve(*bo_ptr, false);
 191         if (r) {
 192                 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
 193                 goto error_free;
 194         }
 195
 196         r = amdgpu_bo_pin(*bo_ptr, domain, gpu_addr);
 197         if (r) {
 198                 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
 199                 goto error_unreserve;
 200         }
 201
 202         if (cpu_addr) {
 203                 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
 204                 if (r) {
 205                         dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
 206                         goto error_unreserve;
 207                 }
 208         }
 209
 210         return 0;
 211
 212 error_unreserve:
 213         amdgpu_bo_unreserve(*bo_ptr);
 214
 215 error_free:
 216         if (free)
 217                 amdgpu_bo_unref(bo_ptr);
 218
 219         return r;
 220 }
 221
 222 /**
 223  * amdgpu_bo_create_kernel - create BO for kernel use
 224  *
 225  * @adev: amdgpu device object
 226  * @size: size for the new BO
 227  * @align: alignment for the new BO
 228  * @domain: where to place it
 229  * @bo_ptr: resulting BO
 230  * @gpu_addr: GPU addr of the pinned BO
 231  * @cpu_addr: optional CPU address mapping
 232  *
 233  * Allocates and pins a BO for kernel internal use.
 234  *
 235  * Returns 0 on success, negative error code otherwise.
 236  */
 237 int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
 238                             unsigned long size, int align,
 239                             u32 domain, struct amdgpu_bo **bo_ptr,
 240                             u64 *gpu_addr, void **cpu_addr)
 241 {
 242         int r;
 243
 244         r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
 245                                       gpu_addr, cpu_addr);
 246
 247         if (r)
 248                 return r;
 249
 250         amdgpu_bo_unreserve(*bo_ptr);
 251
 252         return 0;
 253 }
 254
 255 /**
 256  * amdgpu_bo_free_kernel - free BO for kernel use
 257  *
 258  * @bo: amdgpu BO to free
 259  *
 260  * unmaps and unpin a BO for kernel internal use.
 261  */
 262 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 263                            void **cpu_addr)
 264 {
 265         if (*bo == NULL)
 266                 return;
 267
 268         if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
 269                 if (cpu_addr)
 270                         amdgpu_bo_kunmap(*bo);
 271
 272                 amdgpu_bo_unpin(*bo);
 273                 amdgpu_bo_unreserve(*bo);
 274         }
 275         amdgpu_bo_unref(bo);
 276
 277         if (gpu_addr)
 278                 *gpu_addr = 0;
 279
 280         if (cpu_addr)
 281                 *cpu_addr = NULL;
 282 }
 283
 284 static int amdgpu_bo_do_create(struct amdgpu_device *adev,
 285                                unsigned long size, int byte_align,
 286                                bool kernel, u32 domain, u64 flags,
 287                                struct sg_table *sg,
 288                                struct reservation_object *resv,
 289                                uint64_t init_value,
 290                                struct amdgpu_bo **bo_ptr)
 291 {
 292         struct amdgpu_bo *bo;
 293         enum ttm_bo_type type;
 294         unsigned long page_align;
 295         u64 initial_bytes_moved, bytes_moved;
 296         size_t acc_size;
 297         int r;
 298
 299         page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 300         size = ALIGN(size, PAGE_SIZE);
 301
 302         if (kernel) {
 303                 type = ttm_bo_type_kernel;
 304         } else if (sg) {
 305                 type = ttm_bo_type_sg;
 306         } else {
 307                 type = ttm_bo_type_device;
 308         }
 309         *bo_ptr = NULL;
 310
 311         acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
 312                                        sizeof(struct amdgpu_bo));
 313
 314         bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
 315         if (bo == NULL)
 316                 return -ENOMEM;
 317         r = drm_gem_object_init(adev->ddev, &bo->gem_base, size);
 318         if (unlikely(r)) {
 319                 kfree(bo);
 320                 return r;
 321         }
 322         INIT_LIST_HEAD(&bo->shadow_list);
 323         INIT_LIST_HEAD(&bo->va);
 324         bo->preferred_domains = domain & (AMDGPU_GEM_DOMAIN_VRAM |
 325                                          AMDGPU_GEM_DOMAIN_GTT |
 326                                          AMDGPU_GEM_DOMAIN_CPU |
 327                                          AMDGPU_GEM_DOMAIN_GDS |
 328                                          AMDGPU_GEM_DOMAIN_GWS |
 329                                          AMDGPU_GEM_DOMAIN_OA);
 330         bo->allowed_domains = bo->preferred_domains;
 331         if (!kernel && bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
 332                 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
 333
 334         bo->flags = flags;
 335
 336 #ifdef CONFIG_X86_32
 337         /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
 338          * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
 339          */
 340         bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 341 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
 342         /* Don't try to enable write-combining when it can't work, or things
 343          * may be slow
 344          * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
 345          */
 346
 347 #ifndef CONFIG_COMPILE_TEST
 348 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
 349          thanks to write-combining
 350 #endif
 351
 352         if (bo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
 353                 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
 354                               "better performance thanks to write-combining\n");
 355         bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 356 #else
 357         /* For architectures that don't support WC memory,
 358          * mask out the WC flag from the BO
 359          */
 360         if (!drm_arch_can_wc_memory())
 361                 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 362 #endif
 363
 364         bo->tbo.bdev = &adev->mman.bdev;
 365         amdgpu_ttm_placement_from_domain(bo, domain);
 366
 367         initial_bytes_moved = atomic64_read(&adev->num_bytes_moved);
 368         /* Kernel allocation are uninterruptible */
 369         r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, type,
 370                                  &bo->placement, page_align, !kernel, NULL,
 371                                  acc_size, sg, resv, &amdgpu_ttm_bo_destroy);
 372         if (unlikely(r != 0))
 373                 return r;
 374
 375         bytes_moved = atomic64_read(&adev->num_bytes_moved) -
 376                       initial_bytes_moved;
 377         if (adev->mc.visible_vram_size < adev->mc.real_vram_size &&
 378             bo->tbo.mem.mem_type == TTM_PL_VRAM &&
 379             bo->tbo.mem.start < adev->mc.visible_vram_size >> PAGE_SHIFT)
 380                 amdgpu_cs_report_moved_bytes(adev, bytes_moved, bytes_moved);
 381         else
 382                 amdgpu_cs_report_moved_bytes(adev, bytes_moved, 0);
 383
 384         if (kernel)
 385                 bo->tbo.priority = 1;
 386
 387         if (flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
 388             bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) {
 389                 struct dma_fence *fence;
 390
 391                 r = amdgpu_fill_buffer(bo, init_value, bo->tbo.resv, &fence);
 392                 if (unlikely(r))
 393                         goto fail_unreserve;
 394
 395                 amdgpu_bo_fence(bo, fence, false);
 396                 dma_fence_put(bo->tbo.moving);
 397                 bo->tbo.moving = dma_fence_get(fence);
 398                 dma_fence_put(fence);
 399         }
 400         if (!resv)
 401                 amdgpu_bo_unreserve(bo);
 402         *bo_ptr = bo;
 403
 404         trace_amdgpu_bo_create(bo);
 405
 406         /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
 407         if (type == ttm_bo_type_device)
 408                 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 409
 410         return 0;
 411
 412 fail_unreserve:
 413         if (!resv)
 414                 ww_mutex_unlock(&bo->tbo.resv->lock);
 415         amdgpu_bo_unref(&bo);
 416         return r;
 417 }
 418
 419 static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
 420                                    unsigned long size, int byte_align,
 421                                    struct amdgpu_bo *bo)
 422 {
 423         int r;
 424
 425         if (bo->shadow)
 426                 return 0;
 427
 428         r = amdgpu_bo_do_create(adev, size, byte_align, true,
 429                                 AMDGPU_GEM_DOMAIN_GTT,
 430                                 AMDGPU_GEM_CREATE_CPU_GTT_USWC |
 431                                 AMDGPU_GEM_CREATE_SHADOW,
 432                                 NULL, bo->tbo.resv, 0,
 433                                 &bo->shadow);
 434         if (!r) {
 435                 bo->shadow->parent = amdgpu_bo_ref(bo);
 436                 mutex_lock(&adev->shadow_list_lock);
 437                 list_add_tail(&bo->shadow_list, &adev->shadow_list);
 438                 mutex_unlock(&adev->shadow_list_lock);
 439         }
 440
 441         return r;
 442 }
 443
 444 /* init_value will only take effect when flags contains
 445  * AMDGPU_GEM_CREATE_VRAM_CLEARED.
 446  */
 447 int amdgpu_bo_create(struct amdgpu_device *adev,
 448                      unsigned long size, int byte_align,
 449                      bool kernel, u32 domain, u64 flags,
 450                      struct sg_table *sg,
 451                      struct reservation_object *resv,
 452                      uint64_t init_value,
 453                      struct amdgpu_bo **bo_ptr)
 454 {
 455         uint64_t parent_flags = flags & ~AMDGPU_GEM_CREATE_SHADOW;
 456         int r;
 457
 458         r = amdgpu_bo_do_create(adev, size, byte_align, kernel, domain,
 459                                 parent_flags, sg, resv, init_value, bo_ptr);
 460         if (r)
 461                 return r;
 462
 463         if ((flags & AMDGPU_GEM_CREATE_SHADOW) && amdgpu_need_backup(adev)) {
 464                 if (!resv)
 465                         WARN_ON(reservation_object_lock((*bo_ptr)->tbo.resv,
 466                                                         NULL));
 467
 468                 r = amdgpu_bo_create_shadow(adev, size, byte_align, (*bo_ptr));
 469
 470                 if (!resv)
 471                         reservation_object_unlock((*bo_ptr)->tbo.resv);
 472
 473                 if (r)
 474                         amdgpu_bo_unref(bo_ptr);
 475         }
 476
 477         return r;
 478 }
 479
 480 int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
 481                                struct amdgpu_ring *ring,
 482                                struct amdgpu_bo *bo,
 483                                struct reservation_object *resv,
 484                                struct dma_fence **fence,
 485                                bool direct)
 486
 487 {
 488         struct amdgpu_bo *shadow = bo->shadow;
 489         uint64_t bo_addr, shadow_addr;
 490         int r;
 491
 492         if (!shadow)
 493                 return -EINVAL;
 494
 495         bo_addr = amdgpu_bo_gpu_offset(bo);
 496         shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
 497
 498         r = reservation_object_reserve_shared(bo->tbo.resv);
 499         if (r)
 500                 goto err;
 501
 502         r = amdgpu_copy_buffer(ring, bo_addr, shadow_addr,
 503                                amdgpu_bo_size(bo), resv, fence,
 504                                direct, false);
 505         if (!r)
 506                 amdgpu_bo_fence(bo, *fence, true);
 507
 508 err:
 509         return r;
 510 }
 511
 512 int amdgpu_bo_validate(struct amdgpu_bo *bo)
 513 {
 514         uint32_t domain;
 515         int r;
 516
 517         if (bo->pin_count)
 518                 return 0;
 519
 520         domain = bo->preferred_domains;
 521
 522 retry:
 523         amdgpu_ttm_placement_from_domain(bo, domain);
 524         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 525         if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 526                 domain = bo->allowed_domains;
 527                 goto retry;
 528         }
 529
 530         return r;
 531 }
 532
 533 int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
 534                                   struct amdgpu_ring *ring,
 535                                   struct amdgpu_bo *bo,
 536                                   struct reservation_object *resv,
 537                                   struct dma_fence **fence,
 538                                   bool direct)
 539
 540 {
 541         struct amdgpu_bo *shadow = bo->shadow;
 542         uint64_t bo_addr, shadow_addr;
 543         int r;
 544
 545         if (!shadow)
 546                 return -EINVAL;
 547
 548         bo_addr = amdgpu_bo_gpu_offset(bo);
 549         shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
 550
 551         r = reservation_object_reserve_shared(bo->tbo.resv);
 552         if (r)
 553                 goto err;
 554
 555         r = amdgpu_copy_buffer(ring, shadow_addr, bo_addr,
 556                                amdgpu_bo_size(bo), resv, fence,
 557                                direct, false);
 558         if (!r)
 559                 amdgpu_bo_fence(bo, *fence, true);
 560
 561 err:
 562         return r;
 563 }
 564
 565 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
 566 {
 567         void *kptr;
 568         long r;
 569
 570         if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 571                 return -EPERM;
 572
 573         kptr = amdgpu_bo_kptr(bo);
 574         if (kptr) {
 575                 if (ptr)
 576                         *ptr = kptr;
 577                 return 0;
 578         }
 579
 580         r = reservation_object_wait_timeout_rcu(bo->tbo.resv, false, false,
 581                                                 MAX_SCHEDULE_TIMEOUT);
 582         if (r < 0)
 583                 return r;
 584
 585         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 586         if (r)
 587                 return r;
 588
 589         if (ptr)
 590                 *ptr = amdgpu_bo_kptr(bo);
 591
 592         return 0;
 593 }
 594
 595 void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
 596 {
 597         bool is_iomem;
 598
 599         return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 600 }
 601
 602 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
 603 {
 604         if (bo->kmap.bo)
 605                 ttm_bo_kunmap(&bo->kmap);
 606 }
 607
 608 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
 609 {
 610         if (bo == NULL)
 611                 return NULL;
 612
 613         ttm_bo_reference(&bo->tbo);
 614         return bo;
 615 }
 616
 617 void amdgpu_bo_unref(struct amdgpu_bo **bo)
 618 {
 619         struct ttm_buffer_object *tbo;
 620
 621         if ((*bo) == NULL)
 622                 return;
 623
 624         tbo = &((*bo)->tbo);
 625         ttm_bo_unref(&tbo);
 626         if (tbo == NULL)
 627                 *bo = NULL;
 628 }
 629
 630 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
 631                              u64 min_offset, u64 max_offset,
 632                              u64 *gpu_addr)
 633 {
 634         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 635         int r, i;
 636
 637         if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
 638                 return -EPERM;
 639
 640         if (WARN_ON_ONCE(min_offset > max_offset))
 641                 return -EINVAL;
 642
 643         /* A shared bo cannot be migrated to VRAM */
 644         if (bo->prime_shared_count && (domain == AMDGPU_GEM_DOMAIN_VRAM))
 645                 return -EINVAL;
 646
 647         if (bo->pin_count) {
 648                 uint32_t mem_type = bo->tbo.mem.mem_type;
 649
 650                 if (domain != amdgpu_mem_type_to_domain(mem_type))
 651                         return -EINVAL;
 652
 653                 bo->pin_count++;
 654                 if (gpu_addr)
 655                         *gpu_addr = amdgpu_bo_gpu_offset(bo);
 656
 657                 if (max_offset != 0) {
 658                         u64 domain_start = bo->tbo.bdev->man[mem_type].gpu_offset;
 659                         WARN_ON_ONCE(max_offset <
 660                                      (amdgpu_bo_gpu_offset(bo) - domain_start));
 661                 }
 662
 663                 return 0;
 664         }
 665
 666         bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
 667         /* force to pin into visible video ram */
 668         if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
 669                 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 670         amdgpu_ttm_placement_from_domain(bo, domain);
 671         for (i = 0; i < bo->placement.num_placement; i++) {
 672                 unsigned fpfn, lpfn;
 673
 674                 fpfn = min_offset >> PAGE_SHIFT;
 675                 lpfn = max_offset >> PAGE_SHIFT;
 676
 677                 if (fpfn > bo->placements[i].fpfn)
 678                         bo->placements[i].fpfn = fpfn;
 679                 if (!bo->placements[i].lpfn ||
 680                     (lpfn && lpfn < bo->placements[i].lpfn))
 681                         bo->placements[i].lpfn = lpfn;
 682                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 683         }
 684
 685         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 686         if (unlikely(r)) {
 687                 dev_err(adev->dev, "%p pin failed\n", bo);
 688                 goto error;
 689         }
 690
 691         bo->pin_count = 1;
 692         if (gpu_addr != NULL) {
 693                 r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
 694                 if (unlikely(r)) {
 695                         dev_err(adev->dev, "%p bind failed\n", bo);
 696                         goto error;
 697                 }
 698                 *gpu_addr = amdgpu_bo_gpu_offset(bo);
 699         }
 700         if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
 701                 adev->vram_pin_size += amdgpu_bo_size(bo);
 702                 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 703                         adev->invisible_pin_size += amdgpu_bo_size(bo);
 704         } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
 705                 adev->gart_pin_size += amdgpu_bo_size(bo);
 706         }
 707
 708 error:
 709         return r;
 710 }
 711
 712 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
 713 {
 714         return amdgpu_bo_pin_restricted(bo, domain, 0, 0, gpu_addr);
 715 }
 716
 717 int amdgpu_bo_unpin(struct amdgpu_bo *bo)
 718 {
 719         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 720         int r, i;
 721
 722         if (!bo->pin_count) {
 723                 dev_warn(adev->dev, "%p unpin not necessary\n", bo);
 724                 return 0;
 725         }
 726         bo->pin_count--;
 727         if (bo->pin_count)
 728                 return 0;
 729         for (i = 0; i < bo->placement.num_placement; i++) {
 730                 bo->placements[i].lpfn = 0;
 731                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 732         }
 733         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 734         if (unlikely(r)) {
 735                 dev_err(adev->dev, "%p validate failed for unpin\n", bo);
 736                 goto error;
 737         }
 738
 739         if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
 740                 adev->vram_pin_size -= amdgpu_bo_size(bo);
 741                 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 742                         adev->invisible_pin_size -= amdgpu_bo_size(bo);
 743         } else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
 744                 adev->gart_pin_size -= amdgpu_bo_size(bo);
 745         }
 746
 747 error:
 748         return r;
 749 }
 750
 751 int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
 752 {
 753         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 754         if (0 && (adev->flags & AMD_IS_APU)) {
 755                 /* Useless to evict on IGP chips */
 756                 return 0;
 757         }
 758         return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
 759 }
 760
 761 static const char *amdgpu_vram_names[] = {
 762         "UNKNOWN",
 763         "GDDR1",
 764         "DDR2",
 765         "GDDR3",
 766         "GDDR4",
 767         "GDDR5",
 768         "HBM",
 769         "DDR3"
 770 };
 771
 772 int amdgpu_bo_init(struct amdgpu_device *adev)
 773 {
 774         /* reserve PAT memory space to WC for VRAM */
 775         arch_io_reserve_memtype_wc(adev->mc.aper_base,
 776                                    adev->mc.aper_size);
 777
 778         /* Add an MTRR for the VRAM */
 779         adev->mc.vram_mtrr = arch_phys_wc_add(adev->mc.aper_base,
 780                                               adev->mc.aper_size);
 781         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 782                  adev->mc.mc_vram_size >> 20,
 783                  (unsigned long long)adev->mc.aper_size >> 20);
 784         DRM_INFO("RAM width %dbits %s\n",
 785                  adev->mc.vram_width, amdgpu_vram_names[adev->mc.vram_type]);
 786         return amdgpu_ttm_init(adev);
 787 }
 788
 789 void amdgpu_bo_fini(struct amdgpu_device *adev)
 790 {
 791         amdgpu_ttm_fini(adev);
 792         arch_phys_wc_del(adev->mc.vram_mtrr);
 793         arch_io_free_memtype_wc(adev->mc.aper_base, adev->mc.aper_size);
 794 }
 795
 796 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
 797                              struct vm_area_struct *vma)
 798 {
 799         return ttm_fbdev_mmap(vma, &bo->tbo);
 800 }
 801
 802 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
 803 {
 804         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 805
 806         if (adev->family <= AMDGPU_FAMILY_CZ &&
 807             AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
 808                 return -EINVAL;
 809
 810         bo->tiling_flags = tiling_flags;
 811         return 0;
 812 }
 813
 814 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
 815 {
 816         lockdep_assert_held(&bo->tbo.resv->lock.base);
 817
 818         if (tiling_flags)
 819                 *tiling_flags = bo->tiling_flags;
 820 }
 821
 822 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
 823                             uint32_t metadata_size, uint64_t flags)
 824 {
 825         void *buffer;
 826
 827         if (!metadata_size) {
 828                 if (bo->metadata_size) {
 829                         kfree(bo->metadata);
 830                         bo->metadata = NULL;
 831                         bo->metadata_size = 0;
 832                 }
 833                 return 0;
 834         }
 835
 836         if (metadata == NULL)
 837                 return -EINVAL;
 838
 839         buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
 840         if (buffer == NULL)
 841                 return -ENOMEM;
 842
 843         kfree(bo->metadata);
 844         bo->metadata_flags = flags;
 845         bo->metadata = buffer;
 846         bo->metadata_size = metadata_size;
 847
 848         return 0;
 849 }
 850
 851 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
 852                            size_t buffer_size, uint32_t *metadata_size,
 853                            uint64_t *flags)
 854 {
 855         if (!buffer && !metadata_size)
 856                 return -EINVAL;
 857
 858         if (buffer) {
 859                 if (buffer_size < bo->metadata_size)
 860                         return -EINVAL;
 861
 862                 if (bo->metadata_size)
 863                         memcpy(buffer, bo->metadata, bo->metadata_size);
 864         }
 865
 866         if (metadata_size)
 867                 *metadata_size = bo->metadata_size;
 868         if (flags)
 869                 *flags = bo->metadata_flags;
 870
 871         return 0;
 872 }
 873
 874 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
 875                            bool evict,
 876                            struct ttm_mem_reg *new_mem)
 877 {
 878         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 879         struct amdgpu_bo *abo;
 880         struct ttm_mem_reg *old_mem = &bo->mem;
 881
 882         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 883                 return;
 884
 885         abo = ttm_to_amdgpu_bo(bo);
 886         amdgpu_vm_bo_invalidate(adev, abo, evict);
 887
 888         amdgpu_bo_kunmap(abo);
 889
 890         /* remember the eviction */
 891         if (evict)
 892                 atomic64_inc(&adev->num_evictions);
 893
 894         /* update statistics */
 895         if (!new_mem)
 896                 return;
 897
 898         /* move_notify is called before move happens */
 899         trace_amdgpu_ttm_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
 900 }
 901
 902 int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 903 {
 904         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 905         struct amdgpu_bo *abo;
 906         unsigned long offset, size;
 907         int r;
 908
 909         if (!amdgpu_ttm_bo_is_amdgpu_bo(bo))
 910                 return 0;
 911
 912         abo = ttm_to_amdgpu_bo(bo);
 913
 914         /* Remember that this BO was accessed by the CPU */
 915         abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 916
 917         if (bo->mem.mem_type != TTM_PL_VRAM)
 918                 return 0;
 919
 920         size = bo->mem.num_pages << PAGE_SHIFT;
 921         offset = bo->mem.start << PAGE_SHIFT;
 922         if ((offset + size) <= adev->mc.visible_vram_size)
 923                 return 0;
 924
 925         /* Can't move a pinned BO to visible VRAM */
 926         if (abo->pin_count > 0)
 927                 return -EINVAL;
 928
 929         /* hurrah the memory is not visible ! */
 930         atomic64_inc(&adev->num_vram_cpu_page_faults);
 931         amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
 932                                          AMDGPU_GEM_DOMAIN_GTT);
 933
 934         /* Avoid costly evictions; only set GTT as a busy placement */
 935         abo->placement.num_busy_placement = 1;
 936         abo->placement.busy_placement = &abo->placements[1];
 937
 938         r = ttm_bo_validate(bo, &abo->placement, false, false);
 939         if (unlikely(r != 0))
 940                 return r;
 941
 942         offset = bo->mem.start << PAGE_SHIFT;
 943         /* this should never happen */
 944         if (bo->mem.mem_type == TTM_PL_VRAM &&
 945             (offset + size) > adev->mc.visible_vram_size)
 946                 return -EINVAL;
 947
 948         return 0;
 949 }
 950
 951 /**
 952  * amdgpu_bo_fence - add fence to buffer object
 953  *
 954  * @bo: buffer object in question
 955  * @fence: fence to add
 956  * @shared: true if fence should be added shared
 957  *
 958  */
 959 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
 960                      bool shared)
 961 {
 962         struct reservation_object *resv = bo->tbo.resv;
 963
 964         if (shared)
 965                 reservation_object_add_shared_fence(resv, fence);
 966         else
 967                 reservation_object_add_excl_fence(resv, fence);
 968 }
 969
 970 /**
 971  * amdgpu_bo_gpu_offset - return GPU offset of bo
 972  * @bo: amdgpu object for which we query the offset
 973  *
 974  * Returns current GPU offset of the object.
 975  *
 976  * Note: object should either be pinned or reserved when calling this
 977  * function, it might be useful to add check for this for debugging.
 978  */
 979 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
 980 {
 981         WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
 982         WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_TT &&
 983                      !amdgpu_ttm_is_bound(bo->tbo.ttm));
 984         WARN_ON_ONCE(!ww_mutex_is_locked(&bo->tbo.resv->lock) &&
 985                      !bo->pin_count);
 986         WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
 987         WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
 988                      !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
 989
 990         return bo->tbo.offset;
 991 }