drivers/gpu/drm/radeon/radeon_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/radeon_drm.h>
  36 #include "radeon.h"
  37 #include "radeon_trace.h"
  38
  39
  40 int radeon_ttm_init(struct radeon_device *rdev);
  41 void radeon_ttm_fini(struct radeon_device *rdev);
  42 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  43
  44 /*
  45  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  46  * function are calling it.
  47  */
  48
  49 static void radeon_update_memory_usage(struct radeon_bo *bo,
  50                                        unsigned mem_type, int sign)
  51 {
  52         struct radeon_device *rdev = bo->rdev;
  53         u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
  54
  55         switch (mem_type) {
  56         case TTM_PL_TT:
  57                 if (sign > 0)
  58                         atomic64_add(size, &rdev->gtt_usage);
  59                 else
  60                         atomic64_sub(size, &rdev->gtt_usage);
  61                 break;
  62         case TTM_PL_VRAM:
  63                 if (sign > 0)
  64                         atomic64_add(size, &rdev->vram_usage);
  65                 else
  66                         atomic64_sub(size, &rdev->vram_usage);
  67                 break;
  68         }
  69 }
  70
  71 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  72 {
  73         struct radeon_bo *bo;
  74
  75         bo = container_of(tbo, struct radeon_bo, tbo);
  76
  77         radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
  78
  79         mutex_lock(&bo->rdev->gem.mutex);
  80         list_del_init(&bo->list);
  81         mutex_unlock(&bo->rdev->gem.mutex);
  82         radeon_bo_clear_surface_reg(bo);
  83         WARN_ON(!list_empty(&bo->va));
  84         drm_gem_object_release(&bo->gem_base);
  85         kfree(bo);
  86 }
  87
  88 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  89 {
  90         if (bo->destroy == &radeon_ttm_bo_destroy)
  91                 return true;
  92         return false;
  93 }
  94
  95 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  96 {
  97         u32 c = 0, i;
  98
  99         rbo->placement.fpfn = 0;
 100         rbo->placement.lpfn = 0;
 101         rbo->placement.placement = rbo->placements;
 102         rbo->placement.busy_placement = rbo->placements;
 103         if (domain & RADEON_GEM_DOMAIN_VRAM)
 104                 rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 105                                         TTM_PL_FLAG_VRAM;
 106         if (domain & RADEON_GEM_DOMAIN_GTT) {
 107                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 108                         rbo->placements[c++] = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_TT;
 109                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 110                            (rbo->rdev->flags & RADEON_IS_AGP)) {
 111                         rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 112                                 TTM_PL_FLAG_TT;
 113                 } else {
 114                         rbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_TT;
 115                 }
 116         }
 117         if (domain & RADEON_GEM_DOMAIN_CPU) {
 118                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 119                         rbo->placements[c++] = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_SYSTEM;
 120                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 121                     rbo->rdev->flags & RADEON_IS_AGP) {
 122                         rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
 123                                 TTM_PL_FLAG_SYSTEM;
 124                 } else {
 125                         rbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
 126                 }
 127         }
 128         if (!c)
 129                 rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 130         rbo->placement.num_placement = c;
 131         rbo->placement.num_busy_placement = c;
 132
 133         /*
 134          * Use two-ended allocation depending on the buffer size to
 135          * improve fragmentation quality.
 136          * 512kb was measured as the most optimal number.
 137          */
 138         if (rbo->tbo.mem.size > 512 * 1024) {
 139                 for (i = 0; i < c; i++) {
 140                         rbo->placements[i] |= TTM_PL_FLAG_TOPDOWN;
 141                 }
 142         }
 143 }
 144
 145 int radeon_bo_create(struct radeon_device *rdev,
 146                      unsigned long size, int byte_align, bool kernel, u32 domain,
 147                      u32 flags, struct sg_table *sg, struct radeon_bo **bo_ptr)
 148 {
 149         struct radeon_bo *bo;
 150         enum ttm_bo_type type;
 151         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 152         size_t acc_size;
 153         int r;
 154
 155         size = ALIGN(size, PAGE_SIZE);
 156
 157         if (kernel) {
 158                 type = ttm_bo_type_kernel;
 159         } else if (sg) {
 160                 type = ttm_bo_type_sg;
 161         } else {
 162                 type = ttm_bo_type_device;
 163         }
 164         *bo_ptr = NULL;
 165
 166         acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
 167                                        sizeof(struct radeon_bo));
 168
 169         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 170         if (bo == NULL)
 171                 return -ENOMEM;
 172         r = drm_gem_object_init(rdev->ddev, &bo->gem_base, size);
 173         if (unlikely(r)) {
 174                 kfree(bo);
 175                 return r;
 176         }
 177         bo->rdev = rdev;
 178         bo->surface_reg = -1;
 179         INIT_LIST_HEAD(&bo->list);
 180         INIT_LIST_HEAD(&bo->va);
 181         bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
 182                                        RADEON_GEM_DOMAIN_GTT |
 183                                        RADEON_GEM_DOMAIN_CPU);
 184
 185         bo->flags = flags;
 186         /* PCI GART is always snooped */
 187         if (!(rdev->flags & RADEON_IS_PCIE))
 188                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 189
 190         radeon_ttm_placement_from_domain(bo, domain);
 191         /* Kernel allocation are uninterruptible */
 192         down_read(&rdev->pm.mclk_lock);
 193         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 194                         &bo->placement, page_align, !kernel, NULL,
 195                         acc_size, sg, &radeon_ttm_bo_destroy);
 196         up_read(&rdev->pm.mclk_lock);
 197         if (unlikely(r != 0)) {
 198                 return r;
 199         }
 200         *bo_ptr = bo;
 201
 202         trace_radeon_bo_create(bo);
 203
 204         return 0;
 205 }
 206
 207 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 208 {
 209         bool is_iomem;
 210         int r;
 211
 212         if (bo->kptr) {
 213                 if (ptr) {
 214                         *ptr = bo->kptr;
 215                 }
 216                 return 0;
 217         }
 218         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 219         if (r) {
 220                 return r;
 221         }
 222         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 223         if (ptr) {
 224                 *ptr = bo->kptr;
 225         }
 226         radeon_bo_check_tiling(bo, 0, 0);
 227         return 0;
 228 }
 229
 230 void radeon_bo_kunmap(struct radeon_bo *bo)
 231 {
 232         if (bo->kptr == NULL)
 233                 return;
 234         bo->kptr = NULL;
 235         radeon_bo_check_tiling(bo, 0, 0);
 236         ttm_bo_kunmap(&bo->kmap);
 237 }
 238
 239 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
 240 {
 241         if (bo == NULL)
 242                 return NULL;
 243
 244         ttm_bo_reference(&bo->tbo);
 245         return bo;
 246 }
 247
 248 void radeon_bo_unref(struct radeon_bo **bo)
 249 {
 250         struct ttm_buffer_object *tbo;
 251         struct radeon_device *rdev;
 252
 253         if ((*bo) == NULL)
 254                 return;
 255         rdev = (*bo)->rdev;
 256         tbo = &((*bo)->tbo);
 257         ttm_bo_unref(&tbo);
 258         if (tbo == NULL)
 259                 *bo = NULL;
 260 }
 261
 262 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 263                              u64 *gpu_addr)
 264 {
 265         int r, i;
 266
 267         if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
 268                 return -EPERM;
 269
 270         if (bo->pin_count) {
 271                 bo->pin_count++;
 272                 if (gpu_addr)
 273                         *gpu_addr = radeon_bo_gpu_offset(bo);
 274
 275                 if (max_offset != 0) {
 276                         u64 domain_start;
 277
 278                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 279                                 domain_start = bo->rdev->mc.vram_start;
 280                         else
 281                                 domain_start = bo->rdev->mc.gtt_start;
 282                         WARN_ON_ONCE(max_offset <
 283                                      (radeon_bo_gpu_offset(bo) - domain_start));
 284                 }
 285
 286                 return 0;
 287         }
 288         radeon_ttm_placement_from_domain(bo, domain);
 289         if (domain == RADEON_GEM_DOMAIN_VRAM) {
 290                 /* force to pin into visible video ram */
 291                 bo->placement.lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 292         }
 293         if (max_offset) {
 294                 u64 lpfn = max_offset >> PAGE_SHIFT;
 295
 296                 if (!bo->placement.lpfn)
 297                         bo->placement.lpfn = bo->rdev->mc.gtt_size >> PAGE_SHIFT;
 298
 299                 if (lpfn < bo->placement.lpfn)
 300                         bo->placement.lpfn = lpfn;
 301         }
 302         for (i = 0; i < bo->placement.num_placement; i++)
 303                 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
 304         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 305         if (likely(r == 0)) {
 306                 bo->pin_count = 1;
 307                 if (gpu_addr != NULL)
 308                         *gpu_addr = radeon_bo_gpu_offset(bo);
 309                 if (domain == RADEON_GEM_DOMAIN_VRAM)
 310                         bo->rdev->vram_pin_size += radeon_bo_size(bo);
 311                 else
 312                         bo->rdev->gart_pin_size += radeon_bo_size(bo);
 313         } else {
 314                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 315         }
 316         return r;
 317 }
 318
 319 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 320 {
 321         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 322 }
 323
 324 int radeon_bo_unpin(struct radeon_bo *bo)
 325 {
 326         int r, i;
 327
 328         if (!bo->pin_count) {
 329                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 330                 return 0;
 331         }
 332         bo->pin_count--;
 333         if (bo->pin_count)
 334                 return 0;
 335         for (i = 0; i < bo->placement.num_placement; i++)
 336                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 337         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 338         if (likely(r == 0)) {
 339                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 340                         bo->rdev->vram_pin_size -= radeon_bo_size(bo);
 341                 else
 342                         bo->rdev->gart_pin_size -= radeon_bo_size(bo);
 343         } else {
 344                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 345         }
 346         return r;
 347 }
 348
 349 int radeon_bo_evict_vram(struct radeon_device *rdev)
 350 {
 351         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 352         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 353                 if (rdev->mc.igp_sideport_enabled == false)
 354                         /* Useless to evict on IGP chips */
 355                         return 0;
 356         }
 357         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 358 }
 359
 360 void radeon_bo_force_delete(struct radeon_device *rdev)
 361 {
 362         struct radeon_bo *bo, *n;
 363
 364         if (list_empty(&rdev->gem.objects)) {
 365                 return;
 366         }
 367         dev_err(rdev->dev, "Userspace still has active objects !\n");
 368         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 369                 mutex_lock(&rdev->ddev->struct_mutex);
 370                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 371                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 372                         *((unsigned long *)&bo->gem_base.refcount));
 373                 mutex_lock(&bo->rdev->gem.mutex);
 374                 list_del_init(&bo->list);
 375                 mutex_unlock(&bo->rdev->gem.mutex);
 376                 /* this should unref the ttm bo */
 377                 drm_gem_object_unreference(&bo->gem_base);
 378                 mutex_unlock(&rdev->ddev->struct_mutex);
 379         }
 380 }
 381
 382 int radeon_bo_init(struct radeon_device *rdev)
 383 {
 384         /* Add an MTRR for the VRAM */
 385         if (!rdev->fastfb_working) {
 386                 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
 387                                                       rdev->mc.aper_size);
 388         }
 389         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 390                 rdev->mc.mc_vram_size >> 20,
 391                 (unsigned long long)rdev->mc.aper_size >> 20);
 392         DRM_INFO("RAM width %dbits %cDR\n",
 393                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 394         return radeon_ttm_init(rdev);
 395 }
 396
 397 void radeon_bo_fini(struct radeon_device *rdev)
 398 {
 399         radeon_ttm_fini(rdev);
 400         arch_phys_wc_del(rdev->mc.vram_mtrr);
 401 }
 402
 403 /* Returns how many bytes TTM can move per IB.
 404  */
 405 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
 406 {
 407         u64 real_vram_size = rdev->mc.real_vram_size;
 408         u64 vram_usage = atomic64_read(&rdev->vram_usage);
 409
 410         /* This function is based on the current VRAM usage.
 411          *
 412          * - If all of VRAM is free, allow relocating the number of bytes that
 413          *   is equal to 1/4 of the size of VRAM for this IB.
 414
 415          * - If more than one half of VRAM is occupied, only allow relocating
 416          *   1 MB of data for this IB.
 417          *
 418          * - From 0 to one half of used VRAM, the threshold decreases
 419          *   linearly.
 420          *         __________________
 421          * 1/4 of -|\               |
 422          * VRAM    | \              |
 423          *         |  \             |
 424          *         |   \            |
 425          *         |    \           |
 426          *         |     \          |
 427          *         |      \         |
 428          *         |       \________|1 MB
 429          *         |----------------|
 430          *    VRAM 0 %             100 %
 431          *         used            used
 432          *
 433          * Note: It's a threshold, not a limit. The threshold must be crossed
 434          * for buffer relocations to stop, so any buffer of an arbitrary size
 435          * can be moved as long as the threshold isn't crossed before
 436          * the relocation takes place. We don't want to disable buffer
 437          * relocations completely.
 438          *
 439          * The idea is that buffers should be placed in VRAM at creation time
 440          * and TTM should only do a minimum number of relocations during
 441          * command submission. In practice, you need to submit at least
 442          * a dozen IBs to move all buffers to VRAM if they are in GTT.
 443          *
 444          * Also, things can get pretty crazy under memory pressure and actual
 445          * VRAM usage can change a lot, so playing safe even at 50% does
 446          * consistently increase performance.
 447          */
 448
 449         u64 half_vram = real_vram_size >> 1;
 450         u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
 451         u64 bytes_moved_threshold = half_free_vram >> 1;
 452         return max(bytes_moved_threshold, 1024*1024ull);
 453 }
 454
 455 int radeon_bo_list_validate(struct radeon_device *rdev,
 456                             struct ww_acquire_ctx *ticket,
 457                             struct list_head *head, int ring)
 458 {
 459         struct radeon_cs_reloc *lobj;
 460         struct radeon_bo *bo;
 461         int r;
 462         u64 bytes_moved = 0, initial_bytes_moved;
 463         u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
 464
 465         r = ttm_eu_reserve_buffers(ticket, head);
 466         if (unlikely(r != 0)) {
 467                 return r;
 468         }
 469
 470         list_for_each_entry(lobj, head, tv.head) {
 471                 bo = lobj->robj;
 472                 if (!bo->pin_count) {
 473                         u32 domain = lobj->prefered_domains;
 474                         u32 current_domain =
 475                                 radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
 476
 477                         /* Check if this buffer will be moved and don't move it
 478                          * if we have moved too many buffers for this IB already.
 479                          *
 480                          * Note that this allows moving at least one buffer of
 481                          * any size, because it doesn't take the current "bo"
 482                          * into account. We don't want to disallow buffer moves
 483                          * completely.
 484                          */
 485                         if ((lobj->allowed_domains & current_domain) != 0 &&
 486                             (domain & current_domain) == 0 && /* will be moved */
 487                             bytes_moved > bytes_moved_threshold) {
 488                                 /* don't move it */
 489                                 domain = current_domain;
 490                         }
 491
 492                 retry:
 493                         radeon_ttm_placement_from_domain(bo, domain);
 494                         if (ring == R600_RING_TYPE_UVD_INDEX)
 495                                 radeon_uvd_force_into_uvd_segment(bo);
 496
 497                         initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
 498                         r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 499                         bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
 500                                        initial_bytes_moved;
 501
 502                         if (unlikely(r)) {
 503                                 if (r != -ERESTARTSYS &&
 504                                     domain != lobj->allowed_domains) {
 505                                         domain = lobj->allowed_domains;
 506                                         goto retry;
 507                                 }
 508                                 ttm_eu_backoff_reservation(ticket, head);
 509                                 return r;
 510                         }
 511                 }
 512                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 513                 lobj->tiling_flags = bo->tiling_flags;
 514         }
 515         return 0;
 516 }
 517
 518 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 519                              struct vm_area_struct *vma)
 520 {
 521         return ttm_fbdev_mmap(vma, &bo->tbo);
 522 }
 523
 524 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 525 {
 526         struct radeon_device *rdev = bo->rdev;
 527         struct radeon_surface_reg *reg;
 528         struct radeon_bo *old_object;
 529         int steal;
 530         int i;
 531
 532         lockdep_assert_held(&bo->tbo.resv->lock.base);
 533
 534         if (!bo->tiling_flags)
 535                 return 0;
 536
 537         if (bo->surface_reg >= 0) {
 538                 reg = &rdev->surface_regs[bo->surface_reg];
 539                 i = bo->surface_reg;
 540                 goto out;
 541         }
 542
 543         steal = -1;
 544         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 545
 546                 reg = &rdev->surface_regs[i];
 547                 if (!reg->bo)
 548                         break;
 549
 550                 old_object = reg->bo;
 551                 if (old_object->pin_count == 0)
 552                         steal = i;
 553         }
 554
 555         /* if we are all out */
 556         if (i == RADEON_GEM_MAX_SURFACES) {
 557                 if (steal == -1)
 558                         return -ENOMEM;
 559                 /* find someone with a surface reg and nuke their BO */
 560                 reg = &rdev->surface_regs[steal];
 561                 old_object = reg->bo;
 562                 /* blow away the mapping */
 563                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 564                 ttm_bo_unmap_virtual(&old_object->tbo);
 565                 old_object->surface_reg = -1;
 566                 i = steal;
 567         }
 568
 569         bo->surface_reg = i;
 570         reg->bo = bo;
 571
 572 out:
 573         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 574                                bo->tbo.mem.start << PAGE_SHIFT,
 575                                bo->tbo.num_pages << PAGE_SHIFT);
 576         return 0;
 577 }
 578
 579 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 580 {
 581         struct radeon_device *rdev = bo->rdev;
 582         struct radeon_surface_reg *reg;
 583
 584         if (bo->surface_reg == -1)
 585                 return;
 586
 587         reg = &rdev->surface_regs[bo->surface_reg];
 588         radeon_clear_surface_reg(rdev, bo->surface_reg);
 589
 590         reg->bo = NULL;
 591         bo->surface_reg = -1;
 592 }
 593
 594 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 595                                 uint32_t tiling_flags, uint32_t pitch)
 596 {
 597         struct radeon_device *rdev = bo->rdev;
 598         int r;
 599
 600         if (rdev->family >= CHIP_CEDAR) {
 601                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 602
 603                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 604                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 605                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 606                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 607                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 608                 switch (bankw) {
 609                 case 0:
 610                 case 1:
 611                 case 2:
 612                 case 4:
 613                 case 8:
 614                         break;
 615                 default:
 616                         return -EINVAL;
 617                 }
 618                 switch (bankh) {
 619                 case 0:
 620                 case 1:
 621                 case 2:
 622                 case 4:
 623                 case 8:
 624                         break;
 625                 default:
 626                         return -EINVAL;
 627                 }
 628                 switch (mtaspect) {
 629                 case 0:
 630                 case 1:
 631                 case 2:
 632                 case 4:
 633                 case 8:
 634                         break;
 635                 default:
 636                         return -EINVAL;
 637                 }
 638                 if (tilesplit > 6) {
 639                         return -EINVAL;
 640                 }
 641                 if (stilesplit > 6) {
 642                         return -EINVAL;
 643                 }
 644         }
 645         r = radeon_bo_reserve(bo, false);
 646         if (unlikely(r != 0))
 647                 return r;
 648         bo->tiling_flags = tiling_flags;
 649         bo->pitch = pitch;
 650         radeon_bo_unreserve(bo);
 651         return 0;
 652 }
 653
 654 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 655                                 uint32_t *tiling_flags,
 656                                 uint32_t *pitch)
 657 {
 658         lockdep_assert_held(&bo->tbo.resv->lock.base);
 659
 660         if (tiling_flags)
 661                 *tiling_flags = bo->tiling_flags;
 662         if (pitch)
 663                 *pitch = bo->pitch;
 664 }
 665
 666 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 667                                 bool force_drop)
 668 {
 669         if (!force_drop)
 670                 lockdep_assert_held(&bo->tbo.resv->lock.base);
 671
 672         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 673                 return 0;
 674
 675         if (force_drop) {
 676                 radeon_bo_clear_surface_reg(bo);
 677                 return 0;
 678         }
 679
 680         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 681                 if (!has_moved)
 682                         return 0;
 683
 684                 if (bo->surface_reg >= 0)
 685                         radeon_bo_clear_surface_reg(bo);
 686                 return 0;
 687         }
 688
 689         if ((bo->surface_reg >= 0) && !has_moved)
 690                 return 0;
 691
 692         return radeon_bo_get_surface_reg(bo);
 693 }
 694
 695 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 696                            struct ttm_mem_reg *new_mem)
 697 {
 698         struct radeon_bo *rbo;
 699
 700         if (!radeon_ttm_bo_is_radeon_bo(bo))
 701                 return;
 702
 703         rbo = container_of(bo, struct radeon_bo, tbo);
 704         radeon_bo_check_tiling(rbo, 0, 1);
 705         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 706
 707         /* update statistics */
 708         if (!new_mem)
 709                 return;
 710
 711         radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
 712         radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
 713 }
 714
 715 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 716 {
 717         struct radeon_device *rdev;
 718         struct radeon_bo *rbo;
 719         unsigned long offset, size;
 720         int r;
 721
 722         if (!radeon_ttm_bo_is_radeon_bo(bo))
 723                 return 0;
 724         rbo = container_of(bo, struct radeon_bo, tbo);
 725         radeon_bo_check_tiling(rbo, 0, 0);
 726         rdev = rbo->rdev;
 727         if (bo->mem.mem_type != TTM_PL_VRAM)
 728                 return 0;
 729
 730         size = bo->mem.num_pages << PAGE_SHIFT;
 731         offset = bo->mem.start << PAGE_SHIFT;
 732         if ((offset + size) <= rdev->mc.visible_vram_size)
 733                 return 0;
 734
 735         /* hurrah the memory is not visible ! */
 736         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 737         rbo->placement.lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT;
 738         r = ttm_bo_validate(bo, &rbo->placement, false, false);
 739         if (unlikely(r == -ENOMEM)) {
 740                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 741                 return ttm_bo_validate(bo, &rbo->placement, false, false);
 742         } else if (unlikely(r != 0)) {
 743                 return r;
 744         }
 745
 746         offset = bo->mem.start << PAGE_SHIFT;
 747         /* this should never happen */
 748         if ((offset + size) > rdev->mc.visible_vram_size)
 749                 return -EINVAL;
 750
 751         return 0;
 752 }
 753
 754 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait)
 755 {
 756         int r;
 757
 758         r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
 759         if (unlikely(r != 0))
 760                 return r;
 761         spin_lock(&bo->tbo.bdev->fence_lock);
 762         if (mem_type)
 763                 *mem_type = bo->tbo.mem.mem_type;
 764         if (bo->tbo.sync_obj)
 765                 r = ttm_bo_wait(&bo->tbo, true, true, no_wait);
 766         spin_unlock(&bo->tbo.bdev->fence_lock);
 767         ttm_bo_unreserve(&bo->tbo);
 768         return r;
 769 }