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 <[email protected]>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32
  33 #include <linux/io.h>
  34 #include <linux/list.h>
  35 #include <linux/slab.h>
  36
  37 #include <drm/drm_cache.h>
  38 #include <drm/drm_prime.h>
  39 #include <drm/radeon_drm.h>
  40
  41 #include "radeon.h"
  42 #include "radeon_trace.h"
  43 #include "radeon_ttm.h"
  44
  45 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  46
  47 /*
  48  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  49  * function are calling it.
  50  */
  51
  52 static void radeon_update_memory_usage(struct radeon_bo *bo,
  53                                        unsigned mem_type, int sign)
  54 {
  55         struct radeon_device *rdev = bo->rdev;
  56
  57         switch (mem_type) {
  58         case TTM_PL_TT:
  59                 if (sign > 0)
  60                         atomic64_add(bo->tbo.base.size, &rdev->gtt_usage);
  61                 else
  62                         atomic64_sub(bo->tbo.base.size, &rdev->gtt_usage);
  63                 break;
  64         case TTM_PL_VRAM:
  65                 if (sign > 0)
  66                         atomic64_add(bo->tbo.base.size, &rdev->vram_usage);
  67                 else
  68                         atomic64_sub(bo->tbo.base.size, &rdev->vram_usage);
  69                 break;
  70         }
  71 }
  72
  73 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  74 {
  75         struct radeon_bo *bo;
  76
  77         bo = container_of(tbo, struct radeon_bo, tbo);
  78
  79         radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
  80
  81         mutex_lock(&bo->rdev->gem.mutex);
  82         list_del_init(&bo->list);
  83         mutex_unlock(&bo->rdev->gem.mutex);
  84         radeon_bo_clear_surface_reg(bo);
  85         WARN_ON_ONCE(!list_empty(&bo->va));
  86         if (bo->tbo.base.import_attach)
  87                 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
  88         drm_gem_object_release(&bo->tbo.base);
  89         kfree(bo);
  90 }
  91
  92 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  93 {
  94         if (bo->destroy == &radeon_ttm_bo_destroy)
  95                 return true;
  96         return false;
  97 }
  98
  99 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 100 {
 101         u32 c = 0, i;
 102
 103         rbo->placement.placement = rbo->placements;
 104         rbo->placement.busy_placement = rbo->placements;
 105         if (domain & RADEON_GEM_DOMAIN_VRAM) {
 106                 /* Try placing BOs which don't need CPU access outside of the
 107                  * CPU accessible part of VRAM
 108                  */
 109                 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 110                     rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) {
 111                         rbo->placements[c].fpfn =
 112                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 113                         rbo->placements[c].mem_type = TTM_PL_VRAM;
 114                         rbo->placements[c++].flags = 0;
 115                 }
 116
 117                 rbo->placements[c].fpfn = 0;
 118                 rbo->placements[c].mem_type = TTM_PL_VRAM;
 119                 rbo->placements[c++].flags = 0;
 120         }
 121
 122         if (domain & RADEON_GEM_DOMAIN_GTT) {
 123                 rbo->placements[c].fpfn = 0;
 124                 rbo->placements[c].mem_type = TTM_PL_TT;
 125                 rbo->placements[c++].flags = 0;
 126         }
 127
 128         if (domain & RADEON_GEM_DOMAIN_CPU) {
 129                 rbo->placements[c].fpfn = 0;
 130                 rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 131                 rbo->placements[c++].flags = 0;
 132         }
 133         if (!c) {
 134                 rbo->placements[c].fpfn = 0;
 135                 rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 136                 rbo->placements[c++].flags = 0;
 137         }
 138
 139         rbo->placement.num_placement = c;
 140         rbo->placement.num_busy_placement = c;
 141
 142         for (i = 0; i < c; ++i) {
 143                 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
 144                     (rbo->placements[i].mem_type == TTM_PL_VRAM) &&
 145                     !rbo->placements[i].fpfn)
 146                         rbo->placements[i].lpfn =
 147                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 148                 else
 149                         rbo->placements[i].lpfn = 0;
 150         }
 151 }
 152
 153 int radeon_bo_create(struct radeon_device *rdev,
 154                      unsigned long size, int byte_align, bool kernel,
 155                      u32 domain, u32 flags, struct sg_table *sg,
 156                      struct dma_resv *resv,
 157                      struct radeon_bo **bo_ptr)
 158 {
 159         struct radeon_bo *bo;
 160         enum ttm_bo_type type;
 161         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 162         int r;
 163
 164         size = ALIGN(size, PAGE_SIZE);
 165
 166         if (kernel) {
 167                 type = ttm_bo_type_kernel;
 168         } else if (sg) {
 169                 type = ttm_bo_type_sg;
 170         } else {
 171                 type = ttm_bo_type_device;
 172         }
 173         *bo_ptr = NULL;
 174
 175         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 176         if (bo == NULL)
 177                 return -ENOMEM;
 178         drm_gem_private_object_init(rdev->ddev, &bo->tbo.base, size);
 179         bo->rdev = rdev;
 180         bo->surface_reg = -1;
 181         INIT_LIST_HEAD(&bo->list);
 182         INIT_LIST_HEAD(&bo->va);
 183         bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
 184                                        RADEON_GEM_DOMAIN_GTT |
 185                                        RADEON_GEM_DOMAIN_CPU);
 186
 187         bo->flags = flags;
 188         /* PCI GART is always snooped */
 189         if (!(rdev->flags & RADEON_IS_PCIE))
 190                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 191
 192         /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx
 193          * See https://bugs.freedesktop.org/show_bug.cgi?id=91268
 194          */
 195         if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)
 196                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 197
 198 #ifdef CONFIG_X86_32
 199         /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
 200          * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
 201          */
 202         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 203 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
 204         /* Don't try to enable write-combining when it can't work, or things
 205          * may be slow
 206          * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
 207          */
 208 #ifndef CONFIG_COMPILE_TEST
 209 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
 210          thanks to write-combining
 211 #endif
 212
 213         if (bo->flags & RADEON_GEM_GTT_WC)
 214                 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
 215                               "better performance thanks to write-combining\n");
 216         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 217 #else
 218         /* For architectures that don't support WC memory,
 219          * mask out the WC flag from the BO
 220          */
 221         if (!drm_arch_can_wc_memory())
 222                 bo->flags &= ~RADEON_GEM_GTT_WC;
 223 #endif
 224
 225         radeon_ttm_placement_from_domain(bo, domain);
 226         /* Kernel allocation are uninterruptible */
 227         down_read(&rdev->pm.mclk_lock);
 228         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 229                         &bo->placement, page_align, !kernel, sg, resv,
 230                         &radeon_ttm_bo_destroy);
 231         up_read(&rdev->pm.mclk_lock);
 232         if (unlikely(r != 0)) {
 233                 return r;
 234         }
 235         *bo_ptr = bo;
 236
 237         trace_radeon_bo_create(bo);
 238
 239         return 0;
 240 }
 241
 242 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 243 {
 244         bool is_iomem;
 245         int r;
 246
 247         if (bo->kptr) {
 248                 if (ptr) {
 249                         *ptr = bo->kptr;
 250                 }
 251                 return 0;
 252         }
 253         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.mem.num_pages, &bo->kmap);
 254         if (r) {
 255                 return r;
 256         }
 257         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 258         if (ptr) {
 259                 *ptr = bo->kptr;
 260         }
 261         radeon_bo_check_tiling(bo, 0, 0);
 262         return 0;
 263 }
 264
 265 void radeon_bo_kunmap(struct radeon_bo *bo)
 266 {
 267         if (bo->kptr == NULL)
 268                 return;
 269         bo->kptr = NULL;
 270         radeon_bo_check_tiling(bo, 0, 0);
 271         ttm_bo_kunmap(&bo->kmap);
 272 }
 273
 274 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
 275 {
 276         if (bo == NULL)
 277                 return NULL;
 278
 279         ttm_bo_get(&bo->tbo);
 280         return bo;
 281 }
 282
 283 void radeon_bo_unref(struct radeon_bo **bo)
 284 {
 285         struct ttm_buffer_object *tbo;
 286
 287         if ((*bo) == NULL)
 288                 return;
 289         tbo = &((*bo)->tbo);
 290         ttm_bo_put(tbo);
 291         *bo = NULL;
 292 }
 293
 294 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 295                              u64 *gpu_addr)
 296 {
 297         struct ttm_operation_ctx ctx = { false, false };
 298         int r, i;
 299
 300         if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
 301                 return -EPERM;
 302
 303         if (bo->tbo.pin_count) {
 304                 ttm_bo_pin(&bo->tbo);
 305                 if (gpu_addr)
 306                         *gpu_addr = radeon_bo_gpu_offset(bo);
 307
 308                 if (max_offset != 0) {
 309                         u64 domain_start;
 310
 311                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 312                                 domain_start = bo->rdev->mc.vram_start;
 313                         else
 314                                 domain_start = bo->rdev->mc.gtt_start;
 315                         WARN_ON_ONCE(max_offset <
 316                                      (radeon_bo_gpu_offset(bo) - domain_start));
 317                 }
 318
 319                 return 0;
 320         }
 321         if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) {
 322                 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */
 323                 return -EINVAL;
 324         }
 325
 326         radeon_ttm_placement_from_domain(bo, domain);
 327         for (i = 0; i < bo->placement.num_placement; i++) {
 328                 /* force to pin into visible video ram */
 329                 if ((bo->placements[i].mem_type == TTM_PL_VRAM) &&
 330                     !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 331                     (!max_offset || max_offset > bo->rdev->mc.visible_vram_size))
 332                         bo->placements[i].lpfn =
 333                                 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 334                 else
 335                         bo->placements[i].lpfn = max_offset >> PAGE_SHIFT;
 336         }
 337
 338         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 339         if (likely(r == 0)) {
 340                 ttm_bo_pin(&bo->tbo);
 341                 if (gpu_addr != NULL)
 342                         *gpu_addr = radeon_bo_gpu_offset(bo);
 343                 if (domain == RADEON_GEM_DOMAIN_VRAM)
 344                         bo->rdev->vram_pin_size += radeon_bo_size(bo);
 345                 else
 346                         bo->rdev->gart_pin_size += radeon_bo_size(bo);
 347         } else {
 348                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 349         }
 350         return r;
 351 }
 352
 353 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 354 {
 355         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 356 }
 357
 358 void radeon_bo_unpin(struct radeon_bo *bo)
 359 {
 360         ttm_bo_unpin(&bo->tbo);
 361         if (!bo->tbo.pin_count) {
 362                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 363                         bo->rdev->vram_pin_size -= radeon_bo_size(bo);
 364                 else
 365                         bo->rdev->gart_pin_size -= radeon_bo_size(bo);
 366         }
 367 }
 368
 369 int radeon_bo_evict_vram(struct radeon_device *rdev)
 370 {
 371         struct ttm_device *bdev = &rdev->mman.bdev;
 372         struct ttm_resource_manager *man;
 373
 374         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 375 #ifndef CONFIG_HIBERNATION
 376         if (rdev->flags & RADEON_IS_IGP) {
 377                 if (rdev->mc.igp_sideport_enabled == false)
 378                         /* Useless to evict on IGP chips */
 379                         return 0;
 380         }
 381 #endif
 382         man = ttm_manager_type(bdev, TTM_PL_VRAM);
 383         if (!man)
 384                 return 0;
 385         return ttm_resource_manager_evict_all(bdev, man);
 386 }
 387
 388 void radeon_bo_force_delete(struct radeon_device *rdev)
 389 {
 390         struct radeon_bo *bo, *n;
 391
 392         if (list_empty(&rdev->gem.objects)) {
 393                 return;
 394         }
 395         dev_err(rdev->dev, "Userspace still has active objects !\n");
 396         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 397                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 398                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 399                         *((unsigned long *)&bo->tbo.base.refcount));
 400                 mutex_lock(&bo->rdev->gem.mutex);
 401                 list_del_init(&bo->list);
 402                 mutex_unlock(&bo->rdev->gem.mutex);
 403                 /* this should unref the ttm bo */
 404                 drm_gem_object_put(&bo->tbo.base);
 405         }
 406 }
 407
 408 int radeon_bo_init(struct radeon_device *rdev)
 409 {
 410         /* reserve PAT memory space to WC for VRAM */
 411         arch_io_reserve_memtype_wc(rdev->mc.aper_base,
 412                                    rdev->mc.aper_size);
 413
 414         /* Add an MTRR for the VRAM */
 415         if (!rdev->fastfb_working) {
 416                 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
 417                                                       rdev->mc.aper_size);
 418         }
 419         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 420                 rdev->mc.mc_vram_size >> 20,
 421                 (unsigned long long)rdev->mc.aper_size >> 20);
 422         DRM_INFO("RAM width %dbits %cDR\n",
 423                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 424         return radeon_ttm_init(rdev);
 425 }
 426
 427 void radeon_bo_fini(struct radeon_device *rdev)
 428 {
 429         radeon_ttm_fini(rdev);
 430         arch_phys_wc_del(rdev->mc.vram_mtrr);
 431         arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size);
 432 }
 433
 434 /* Returns how many bytes TTM can move per IB.
 435  */
 436 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
 437 {
 438         u64 real_vram_size = rdev->mc.real_vram_size;
 439         u64 vram_usage = atomic64_read(&rdev->vram_usage);
 440
 441         /* This function is based on the current VRAM usage.
 442          *
 443          * - If all of VRAM is free, allow relocating the number of bytes that
 444          *   is equal to 1/4 of the size of VRAM for this IB.
 445
 446          * - If more than one half of VRAM is occupied, only allow relocating
 447          *   1 MB of data for this IB.
 448          *
 449          * - From 0 to one half of used VRAM, the threshold decreases
 450          *   linearly.
 451          *         __________________
 452          * 1/4 of -|\               |
 453          * VRAM    | \              |
 454          *         |  \             |
 455          *         |   \            |
 456          *         |    \           |
 457          *         |     \          |
 458          *         |      \         |
 459          *         |       \________|1 MB
 460          *         |----------------|
 461          *    VRAM 0 %             100 %
 462          *         used            used
 463          *
 464          * Note: It's a threshold, not a limit. The threshold must be crossed
 465          * for buffer relocations to stop, so any buffer of an arbitrary size
 466          * can be moved as long as the threshold isn't crossed before
 467          * the relocation takes place. We don't want to disable buffer
 468          * relocations completely.
 469          *
 470          * The idea is that buffers should be placed in VRAM at creation time
 471          * and TTM should only do a minimum number of relocations during
 472          * command submission. In practice, you need to submit at least
 473          * a dozen IBs to move all buffers to VRAM if they are in GTT.
 474          *
 475          * Also, things can get pretty crazy under memory pressure and actual
 476          * VRAM usage can change a lot, so playing safe even at 50% does
 477          * consistently increase performance.
 478          */
 479
 480         u64 half_vram = real_vram_size >> 1;
 481         u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
 482         u64 bytes_moved_threshold = half_free_vram >> 1;
 483         return max(bytes_moved_threshold, 1024*1024ull);
 484 }
 485
 486 int radeon_bo_list_validate(struct radeon_device *rdev,
 487                             struct ww_acquire_ctx *ticket,
 488                             struct list_head *head, int ring)
 489 {
 490         struct ttm_operation_ctx ctx = { true, false };
 491         struct radeon_bo_list *lobj;
 492         struct list_head duplicates;
 493         int r;
 494         u64 bytes_moved = 0, initial_bytes_moved;
 495         u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
 496
 497         INIT_LIST_HEAD(&duplicates);
 498         r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates);
 499         if (unlikely(r != 0)) {
 500                 return r;
 501         }
 502
 503         list_for_each_entry(lobj, head, tv.head) {
 504                 struct radeon_bo *bo = lobj->robj;
 505                 if (!bo->tbo.pin_count) {
 506                         u32 domain = lobj->preferred_domains;
 507                         u32 allowed = lobj->allowed_domains;
 508                         u32 current_domain =
 509                                 radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
 510
 511                         /* Check if this buffer will be moved and don't move it
 512                          * if we have moved too many buffers for this IB already.
 513                          *
 514                          * Note that this allows moving at least one buffer of
 515                          * any size, because it doesn't take the current "bo"
 516                          * into account. We don't want to disallow buffer moves
 517                          * completely.
 518                          */
 519                         if ((allowed & current_domain) != 0 &&
 520                             (domain & current_domain) == 0 && /* will be moved */
 521                             bytes_moved > bytes_moved_threshold) {
 522                                 /* don't move it */
 523                                 domain = current_domain;
 524                         }
 525
 526                 retry:
 527                         radeon_ttm_placement_from_domain(bo, domain);
 528                         if (ring == R600_RING_TYPE_UVD_INDEX)
 529                                 radeon_uvd_force_into_uvd_segment(bo, allowed);
 530
 531                         initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
 532                         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 533                         bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
 534                                        initial_bytes_moved;
 535
 536                         if (unlikely(r)) {
 537                                 if (r != -ERESTARTSYS &&
 538                                     domain != lobj->allowed_domains) {
 539                                         domain = lobj->allowed_domains;
 540                                         goto retry;
 541                                 }
 542                                 ttm_eu_backoff_reservation(ticket, head);
 543                                 return r;
 544                         }
 545                 }
 546                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 547                 lobj->tiling_flags = bo->tiling_flags;
 548         }
 549
 550         list_for_each_entry(lobj, &duplicates, tv.head) {
 551                 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj);
 552                 lobj->tiling_flags = lobj->robj->tiling_flags;
 553         }
 554
 555         return 0;
 556 }
 557
 558 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 559 {
 560         struct radeon_device *rdev = bo->rdev;
 561         struct radeon_surface_reg *reg;
 562         struct radeon_bo *old_object;
 563         int steal;
 564         int i;
 565
 566         dma_resv_assert_held(bo->tbo.base.resv);
 567
 568         if (!bo->tiling_flags)
 569                 return 0;
 570
 571         if (bo->surface_reg >= 0) {
 572                 reg = &rdev->surface_regs[bo->surface_reg];
 573                 i = bo->surface_reg;
 574                 goto out;
 575         }
 576
 577         steal = -1;
 578         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 579
 580                 reg = &rdev->surface_regs[i];
 581                 if (!reg->bo)
 582                         break;
 583
 584                 old_object = reg->bo;
 585                 if (old_object->tbo.pin_count == 0)
 586                         steal = i;
 587         }
 588
 589         /* if we are all out */
 590         if (i == RADEON_GEM_MAX_SURFACES) {
 591                 if (steal == -1)
 592                         return -ENOMEM;
 593                 /* find someone with a surface reg and nuke their BO */
 594                 reg = &rdev->surface_regs[steal];
 595                 old_object = reg->bo;
 596                 /* blow away the mapping */
 597                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 598                 ttm_bo_unmap_virtual(&old_object->tbo);
 599                 old_object->surface_reg = -1;
 600                 i = steal;
 601         }
 602
 603         bo->surface_reg = i;
 604         reg->bo = bo;
 605
 606 out:
 607         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 608                                bo->tbo.mem.start << PAGE_SHIFT,
 609                                bo->tbo.base.size);
 610         return 0;
 611 }
 612
 613 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 614 {
 615         struct radeon_device *rdev = bo->rdev;
 616         struct radeon_surface_reg *reg;
 617
 618         if (bo->surface_reg == -1)
 619                 return;
 620
 621         reg = &rdev->surface_regs[bo->surface_reg];
 622         radeon_clear_surface_reg(rdev, bo->surface_reg);
 623
 624         reg->bo = NULL;
 625         bo->surface_reg = -1;
 626 }
 627
 628 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 629                                 uint32_t tiling_flags, uint32_t pitch)
 630 {
 631         struct radeon_device *rdev = bo->rdev;
 632         int r;
 633
 634         if (rdev->family >= CHIP_CEDAR) {
 635                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 636
 637                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 638                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 639                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 640                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 641                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 642                 switch (bankw) {
 643                 case 0:
 644                 case 1:
 645                 case 2:
 646                 case 4:
 647                 case 8:
 648                         break;
 649                 default:
 650                         return -EINVAL;
 651                 }
 652                 switch (bankh) {
 653                 case 0:
 654                 case 1:
 655                 case 2:
 656                 case 4:
 657                 case 8:
 658                         break;
 659                 default:
 660                         return -EINVAL;
 661                 }
 662                 switch (mtaspect) {
 663                 case 0:
 664                 case 1:
 665                 case 2:
 666                 case 4:
 667                 case 8:
 668                         break;
 669                 default:
 670                         return -EINVAL;
 671                 }
 672                 if (tilesplit > 6) {
 673                         return -EINVAL;
 674                 }
 675                 if (stilesplit > 6) {
 676                         return -EINVAL;
 677                 }
 678         }
 679         r = radeon_bo_reserve(bo, false);
 680         if (unlikely(r != 0))
 681                 return r;
 682         bo->tiling_flags = tiling_flags;
 683         bo->pitch = pitch;
 684         radeon_bo_unreserve(bo);
 685         return 0;
 686 }
 687
 688 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 689                                 uint32_t *tiling_flags,
 690                                 uint32_t *pitch)
 691 {
 692         dma_resv_assert_held(bo->tbo.base.resv);
 693
 694         if (tiling_flags)
 695                 *tiling_flags = bo->tiling_flags;
 696         if (pitch)
 697                 *pitch = bo->pitch;
 698 }
 699
 700 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 701                                 bool force_drop)
 702 {
 703         if (!force_drop)
 704                 dma_resv_assert_held(bo->tbo.base.resv);
 705
 706         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 707                 return 0;
 708
 709         if (force_drop) {
 710                 radeon_bo_clear_surface_reg(bo);
 711                 return 0;
 712         }
 713
 714         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 715                 if (!has_moved)
 716                         return 0;
 717
 718                 if (bo->surface_reg >= 0)
 719                         radeon_bo_clear_surface_reg(bo);
 720                 return 0;
 721         }
 722
 723         if ((bo->surface_reg >= 0) && !has_moved)
 724                 return 0;
 725
 726         return radeon_bo_get_surface_reg(bo);
 727 }
 728
 729 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 730                            bool evict,
 731                            struct ttm_resource *new_mem)
 732 {
 733         struct radeon_bo *rbo;
 734
 735         if (!radeon_ttm_bo_is_radeon_bo(bo))
 736                 return;
 737
 738         rbo = container_of(bo, struct radeon_bo, tbo);
 739         radeon_bo_check_tiling(rbo, 0, 1);
 740         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 741
 742         /* update statistics */
 743         if (!new_mem)
 744                 return;
 745
 746         radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
 747         radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
 748 }
 749
 750 vm_fault_t radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 751 {
 752         struct ttm_operation_ctx ctx = { false, false };
 753         struct radeon_device *rdev;
 754         struct radeon_bo *rbo;
 755         unsigned long offset, size, lpfn;
 756         int i, r;
 757
 758         if (!radeon_ttm_bo_is_radeon_bo(bo))
 759                 return 0;
 760         rbo = container_of(bo, struct radeon_bo, tbo);
 761         radeon_bo_check_tiling(rbo, 0, 0);
 762         rdev = rbo->rdev;
 763         if (bo->mem.mem_type != TTM_PL_VRAM)
 764                 return 0;
 765
 766         size = bo->mem.num_pages << PAGE_SHIFT;
 767         offset = bo->mem.start << PAGE_SHIFT;
 768         if ((offset + size) <= rdev->mc.visible_vram_size)
 769                 return 0;
 770
 771         /* Can't move a pinned BO to visible VRAM */
 772         if (rbo->tbo.pin_count > 0)
 773                 return VM_FAULT_SIGBUS;
 774
 775         /* hurrah the memory is not visible ! */
 776         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 777         lpfn =  rdev->mc.visible_vram_size >> PAGE_SHIFT;
 778         for (i = 0; i < rbo->placement.num_placement; i++) {
 779                 /* Force into visible VRAM */
 780                 if ((rbo->placements[i].mem_type == TTM_PL_VRAM) &&
 781                     (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn))
 782                         rbo->placements[i].lpfn = lpfn;
 783         }
 784         r = ttm_bo_validate(bo, &rbo->placement, &ctx);
 785         if (unlikely(r == -ENOMEM)) {
 786                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 787                 r = ttm_bo_validate(bo, &rbo->placement, &ctx);
 788         } else if (likely(!r)) {
 789                 offset = bo->mem.start << PAGE_SHIFT;
 790                 /* this should never happen */
 791                 if ((offset + size) > rdev->mc.visible_vram_size)
 792                         return VM_FAULT_SIGBUS;
 793         }
 794
 795         if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
 796                 return VM_FAULT_NOPAGE;
 797         else if (unlikely(r))
 798                 return VM_FAULT_SIGBUS;
 799
 800         ttm_bo_move_to_lru_tail_unlocked(bo);
 801         return 0;
 802 }
 803
 804 /**
 805  * radeon_bo_fence - add fence to buffer object
 806  *
 807  * @bo: buffer object in question
 808  * @fence: fence to add
 809  * @shared: true if fence should be added shared
 810  *
 811  */
 812 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence,
 813                      bool shared)
 814 {
 815         struct dma_resv *resv = bo->tbo.base.resv;
 816
 817         if (shared)
 818                 dma_resv_add_shared_fence(resv, &fence->base);
 819         else
 820                 dma_resv_add_excl_fence(resv, &fence->base);
 821 }