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