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 <drm/drm_cache.h>
  37 #include "radeon.h"
  38 #include "radeon_trace.h"
  39
  40
  41 int radeon_ttm_init(struct radeon_device *rdev);
  42 void radeon_ttm_fini(struct radeon_device *rdev);
  43 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  44
  45 /*
  46  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  47  * function are calling it.
  48  */
  49
  50 static void radeon_update_memory_usage(struct radeon_bo *bo,
  51                                        unsigned mem_type, int sign)
  52 {
  53         struct radeon_device *rdev = bo->rdev;
  54         u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
  55
  56         switch (mem_type) {
  57         case TTM_PL_TT:
  58                 if (sign > 0)
  59                         atomic64_add(size, &rdev->gtt_usage);
  60                 else
  61                         atomic64_sub(size, &rdev->gtt_usage);
  62                 break;
  63         case TTM_PL_VRAM:
  64                 if (sign > 0)
  65                         atomic64_add(size, &rdev->vram_usage);
  66                 else
  67                         atomic64_sub(size, &rdev->vram_usage);
  68                 break;
  69         }
  70 }
  71
  72 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  73 {
  74         struct radeon_bo *bo;
  75
  76         bo = container_of(tbo, struct radeon_bo, tbo);
  77
  78         radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
  79
  80         mutex_lock(&bo->rdev->gem.mutex);
  81         list_del_init(&bo->list);
  82         mutex_unlock(&bo->rdev->gem.mutex);
  83         radeon_bo_clear_surface_reg(bo);
  84         WARN_ON_ONCE(!list_empty(&bo->va));
  85         if (bo->gem_base.import_attach)
  86                 drm_prime_gem_destroy(&bo->gem_base, bo->tbo.sg);
  87         drm_gem_object_release(&bo->gem_base);
  88         kfree(bo);
  89 }
  90
  91 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  92 {
  93         if (bo->destroy == &radeon_ttm_bo_destroy)
  94                 return true;
  95         return false;
  96 }
  97
  98 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  99 {
 100         u32 c = 0, i;
 101
 102         rbo->placement.placement = rbo->placements;
 103         rbo->placement.busy_placement = rbo->placements;
 104         if (domain & RADEON_GEM_DOMAIN_VRAM) {
 105                 /* Try placing BOs which don't need CPU access outside of the
 106                  * CPU accessible part of VRAM
 107                  */
 108                 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 109                     rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) {
 110                         rbo->placements[c].fpfn =
 111                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 112                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 113                                                      TTM_PL_FLAG_UNCACHED |
 114                                                      TTM_PL_FLAG_VRAM;
 115                 }
 116
 117                 rbo->placements[c].fpfn = 0;
 118                 rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 119                                              TTM_PL_FLAG_UNCACHED |
 120                                              TTM_PL_FLAG_VRAM;
 121         }
 122
 123         if (domain & RADEON_GEM_DOMAIN_GTT) {
 124                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 125                         rbo->placements[c].fpfn = 0;
 126                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 127                                 TTM_PL_FLAG_TT;
 128
 129                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 130                            (rbo->rdev->flags & RADEON_IS_AGP)) {
 131                         rbo->placements[c].fpfn = 0;
 132                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 133                                 TTM_PL_FLAG_UNCACHED |
 134                                 TTM_PL_FLAG_TT;
 135                 } else {
 136                         rbo->placements[c].fpfn = 0;
 137                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED |
 138                                                      TTM_PL_FLAG_TT;
 139                 }
 140         }
 141
 142         if (domain & RADEON_GEM_DOMAIN_CPU) {
 143                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 144                         rbo->placements[c].fpfn = 0;
 145                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 146                                 TTM_PL_FLAG_SYSTEM;
 147
 148                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 149                     rbo->rdev->flags & RADEON_IS_AGP) {
 150                         rbo->placements[c].fpfn = 0;
 151                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 152                                 TTM_PL_FLAG_UNCACHED |
 153                                 TTM_PL_FLAG_SYSTEM;
 154                 } else {
 155                         rbo->placements[c].fpfn = 0;
 156                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED |
 157                                                      TTM_PL_FLAG_SYSTEM;
 158                 }
 159         }
 160         if (!c) {
 161                 rbo->placements[c].fpfn = 0;
 162                 rbo->placements[c++].flags = TTM_PL_MASK_CACHING |
 163                                              TTM_PL_FLAG_SYSTEM;
 164         }
 165
 166         rbo->placement.num_placement = c;
 167         rbo->placement.num_busy_placement = c;
 168
 169         for (i = 0; i < c; ++i) {
 170                 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
 171                     (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 172                     !rbo->placements[i].fpfn)
 173                         rbo->placements[i].lpfn =
 174                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 175                 else
 176                         rbo->placements[i].lpfn = 0;
 177         }
 178 }
 179
 180 int radeon_bo_create(struct radeon_device *rdev,
 181                      unsigned long size, int byte_align, bool kernel,
 182                      u32 domain, u32 flags, struct sg_table *sg,
 183                      struct reservation_object *resv,
 184                      struct radeon_bo **bo_ptr)
 185 {
 186         struct radeon_bo *bo;
 187         enum ttm_bo_type type;
 188         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 189         size_t acc_size;
 190         int r;
 191
 192         size = ALIGN(size, PAGE_SIZE);
 193
 194         if (kernel) {
 195                 type = ttm_bo_type_kernel;
 196         } else if (sg) {
 197                 type = ttm_bo_type_sg;
 198         } else {
 199                 type = ttm_bo_type_device;
 200         }
 201         *bo_ptr = NULL;
 202
 203         acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
 204                                        sizeof(struct radeon_bo));
 205
 206         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 207         if (bo == NULL)
 208                 return -ENOMEM;
 209         r = drm_gem_object_init(rdev->ddev, &bo->gem_base, size);
 210         if (unlikely(r)) {
 211                 kfree(bo);
 212                 return r;
 213         }
 214         bo->rdev = rdev;
 215         bo->surface_reg = -1;
 216         INIT_LIST_HEAD(&bo->list);
 217         INIT_LIST_HEAD(&bo->va);
 218         bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
 219                                        RADEON_GEM_DOMAIN_GTT |
 220                                        RADEON_GEM_DOMAIN_CPU);
 221
 222         bo->flags = flags;
 223         /* PCI GART is always snooped */
 224         if (!(rdev->flags & RADEON_IS_PCIE))
 225                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 226
 227         /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx
 228          * See https://bugs.freedesktop.org/show_bug.cgi?id=91268
 229          */
 230         if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)
 231                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 232
 233 #ifdef CONFIG_X86_32
 234         /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
 235          * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
 236          */
 237         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 238 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
 239         /* Don't try to enable write-combining when it can't work, or things
 240          * may be slow
 241          * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
 242          */
 243 #ifndef CONFIG_COMPILE_TEST
 244 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
 245          thanks to write-combining
 246 #endif
 247
 248         if (bo->flags & RADEON_GEM_GTT_WC)
 249                 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
 250                               "better performance thanks to write-combining\n");
 251         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 252 #else
 253         /* For architectures that don't support WC memory,
 254          * mask out the WC flag from the BO
 255          */
 256         if (!drm_arch_can_wc_memory())
 257                 bo->flags &= ~RADEON_GEM_GTT_WC;
 258 #endif
 259
 260         radeon_ttm_placement_from_domain(bo, domain);
 261         /* Kernel allocation are uninterruptible */
 262         down_read(&rdev->pm.mclk_lock);
 263         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 264                         &bo->placement, page_align, !kernel, NULL,
 265                         acc_size, sg, resv, &radeon_ttm_bo_destroy);
 266         up_read(&rdev->pm.mclk_lock);
 267         if (unlikely(r != 0)) {
 268                 return r;
 269         }
 270         *bo_ptr = bo;
 271
 272         trace_radeon_bo_create(bo);
 273
 274         return 0;
 275 }
 276
 277 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 278 {
 279         bool is_iomem;
 280         int r;
 281
 282         if (bo->kptr) {
 283                 if (ptr) {
 284                         *ptr = bo->kptr;
 285                 }
 286                 return 0;
 287         }
 288         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 289         if (r) {
 290                 return r;
 291         }
 292         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 293         if (ptr) {
 294                 *ptr = bo->kptr;
 295         }
 296         radeon_bo_check_tiling(bo, 0, 0);
 297         return 0;
 298 }
 299
 300 void radeon_bo_kunmap(struct radeon_bo *bo)
 301 {
 302         if (bo->kptr == NULL)
 303                 return;
 304         bo->kptr = NULL;
 305         radeon_bo_check_tiling(bo, 0, 0);
 306         ttm_bo_kunmap(&bo->kmap);
 307 }
 308
 309 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
 310 {
 311         if (bo == NULL)
 312                 return NULL;
 313
 314         ttm_bo_reference(&bo->tbo);
 315         return bo;
 316 }
 317
 318 void radeon_bo_unref(struct radeon_bo **bo)
 319 {
 320         struct ttm_buffer_object *tbo;
 321         struct radeon_device *rdev;
 322
 323         if ((*bo) == NULL)
 324                 return;
 325         rdev = (*bo)->rdev;
 326         tbo = &((*bo)->tbo);
 327         ttm_bo_unref(&tbo);
 328         if (tbo == NULL)
 329                 *bo = NULL;
 330 }
 331
 332 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 333                              u64 *gpu_addr)
 334 {
 335         int r, i;
 336
 337         if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
 338                 return -EPERM;
 339
 340         if (bo->pin_count) {
 341                 bo->pin_count++;
 342                 if (gpu_addr)
 343                         *gpu_addr = radeon_bo_gpu_offset(bo);
 344
 345                 if (max_offset != 0) {
 346                         u64 domain_start;
 347
 348                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 349                                 domain_start = bo->rdev->mc.vram_start;
 350                         else
 351                                 domain_start = bo->rdev->mc.gtt_start;
 352                         WARN_ON_ONCE(max_offset <
 353                                      (radeon_bo_gpu_offset(bo) - domain_start));
 354                 }
 355
 356                 return 0;
 357         }
 358         if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) {
 359                 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */
 360                 return -EINVAL;
 361         }
 362
 363         radeon_ttm_placement_from_domain(bo, domain);
 364         for (i = 0; i < bo->placement.num_placement; i++) {
 365                 /* force to pin into visible video ram */
 366                 if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 367                     !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 368                     (!max_offset || max_offset > bo->rdev->mc.visible_vram_size))
 369                         bo->placements[i].lpfn =
 370                                 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 371                 else
 372                         bo->placements[i].lpfn = max_offset >> PAGE_SHIFT;
 373
 374                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 375         }
 376
 377         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 378         if (likely(r == 0)) {
 379                 bo->pin_count = 1;
 380                 if (gpu_addr != NULL)
 381                         *gpu_addr = radeon_bo_gpu_offset(bo);
 382                 if (domain == RADEON_GEM_DOMAIN_VRAM)
 383                         bo->rdev->vram_pin_size += radeon_bo_size(bo);
 384                 else
 385                         bo->rdev->gart_pin_size += radeon_bo_size(bo);
 386         } else {
 387                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 388         }
 389         return r;
 390 }
 391
 392 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 393 {
 394         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 395 }
 396
 397 int radeon_bo_unpin(struct radeon_bo *bo)
 398 {
 399         int r, i;
 400
 401         if (!bo->pin_count) {
 402                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 403                 return 0;
 404         }
 405         bo->pin_count--;
 406         if (bo->pin_count)
 407                 return 0;
 408         for (i = 0; i < bo->placement.num_placement; i++) {
 409                 bo->placements[i].lpfn = 0;
 410                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 411         }
 412         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 413         if (likely(r == 0)) {
 414                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 415                         bo->rdev->vram_pin_size -= radeon_bo_size(bo);
 416                 else
 417                         bo->rdev->gart_pin_size -= radeon_bo_size(bo);
 418         } else {
 419                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 420         }
 421         return r;
 422 }
 423
 424 int radeon_bo_evict_vram(struct radeon_device *rdev)
 425 {
 426         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 427         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 428                 if (rdev->mc.igp_sideport_enabled == false)
 429                         /* Useless to evict on IGP chips */
 430                         return 0;
 431         }
 432         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 433 }
 434
 435 void radeon_bo_force_delete(struct radeon_device *rdev)
 436 {
 437         struct radeon_bo *bo, *n;
 438
 439         if (list_empty(&rdev->gem.objects)) {
 440                 return;
 441         }
 442         dev_err(rdev->dev, "Userspace still has active objects !\n");
 443         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 444                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 445                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 446                         *((unsigned long *)&bo->gem_base.refcount));
 447                 mutex_lock(&bo->rdev->gem.mutex);
 448                 list_del_init(&bo->list);
 449                 mutex_unlock(&bo->rdev->gem.mutex);
 450                 /* this should unref the ttm bo */
 451                 drm_gem_object_put_unlocked(&bo->gem_base);
 452         }
 453 }
 454
 455 int radeon_bo_init(struct radeon_device *rdev)
 456 {
 457         /* reserve PAT memory space to WC for VRAM */
 458         arch_io_reserve_memtype_wc(rdev->mc.aper_base,
 459                                    rdev->mc.aper_size);
 460
 461         /* Add an MTRR for the VRAM */
 462         if (!rdev->fastfb_working) {
 463                 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
 464                                                       rdev->mc.aper_size);
 465         }
 466         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 467                 rdev->mc.mc_vram_size >> 20,
 468                 (unsigned long long)rdev->mc.aper_size >> 20);
 469         DRM_INFO("RAM width %dbits %cDR\n",
 470                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 471         return radeon_ttm_init(rdev);
 472 }
 473
 474 void radeon_bo_fini(struct radeon_device *rdev)
 475 {
 476         radeon_ttm_fini(rdev);
 477         arch_phys_wc_del(rdev->mc.vram_mtrr);
 478         arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size);
 479 }
 480
 481 /* Returns how many bytes TTM can move per IB.
 482  */
 483 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
 484 {
 485         u64 real_vram_size = rdev->mc.real_vram_size;
 486         u64 vram_usage = atomic64_read(&rdev->vram_usage);
 487
 488         /* This function is based on the current VRAM usage.
 489          *
 490          * - If all of VRAM is free, allow relocating the number of bytes that
 491          *   is equal to 1/4 of the size of VRAM for this IB.
 492
 493          * - If more than one half of VRAM is occupied, only allow relocating
 494          *   1 MB of data for this IB.
 495          *
 496          * - From 0 to one half of used VRAM, the threshold decreases
 497          *   linearly.
 498          *         __________________
 499          * 1/4 of -|\               |
 500          * VRAM    | \              |
 501          *         |  \             |
 502          *         |   \            |
 503          *         |    \           |
 504          *         |     \          |
 505          *         |      \         |
 506          *         |       \________|1 MB
 507          *         |----------------|
 508          *    VRAM 0 %             100 %
 509          *         used            used
 510          *
 511          * Note: It's a threshold, not a limit. The threshold must be crossed
 512          * for buffer relocations to stop, so any buffer of an arbitrary size
 513          * can be moved as long as the threshold isn't crossed before
 514          * the relocation takes place. We don't want to disable buffer
 515          * relocations completely.
 516          *
 517          * The idea is that buffers should be placed in VRAM at creation time
 518          * and TTM should only do a minimum number of relocations during
 519          * command submission. In practice, you need to submit at least
 520          * a dozen IBs to move all buffers to VRAM if they are in GTT.
 521          *
 522          * Also, things can get pretty crazy under memory pressure and actual
 523          * VRAM usage can change a lot, so playing safe even at 50% does
 524          * consistently increase performance.
 525          */
 526
 527         u64 half_vram = real_vram_size >> 1;
 528         u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
 529         u64 bytes_moved_threshold = half_free_vram >> 1;
 530         return max(bytes_moved_threshold, 1024*1024ull);
 531 }
 532
 533 int radeon_bo_list_validate(struct radeon_device *rdev,
 534                             struct ww_acquire_ctx *ticket,
 535                             struct list_head *head, int ring)
 536 {
 537         struct radeon_bo_list *lobj;
 538         struct list_head duplicates;
 539         int r;
 540         u64 bytes_moved = 0, initial_bytes_moved;
 541         u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
 542
 543         INIT_LIST_HEAD(&duplicates);
 544         r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates);
 545         if (unlikely(r != 0)) {
 546                 return r;
 547         }
 548
 549         list_for_each_entry(lobj, head, tv.head) {
 550                 struct radeon_bo *bo = lobj->robj;
 551                 if (!bo->pin_count) {
 552                         u32 domain = lobj->preferred_domains;
 553                         u32 allowed = lobj->allowed_domains;
 554                         u32 current_domain =
 555                                 radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
 556
 557                         /* Check if this buffer will be moved and don't move it
 558                          * if we have moved too many buffers for this IB already.
 559                          *
 560                          * Note that this allows moving at least one buffer of
 561                          * any size, because it doesn't take the current "bo"
 562                          * into account. We don't want to disallow buffer moves
 563                          * completely.
 564                          */
 565                         if ((allowed & current_domain) != 0 &&
 566                             (domain & current_domain) == 0 && /* will be moved */
 567                             bytes_moved > bytes_moved_threshold) {
 568                                 /* don't move it */
 569                                 domain = current_domain;
 570                         }
 571
 572                 retry:
 573                         radeon_ttm_placement_from_domain(bo, domain);
 574                         if (ring == R600_RING_TYPE_UVD_INDEX)
 575                                 radeon_uvd_force_into_uvd_segment(bo, allowed);
 576
 577                         initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
 578                         r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 579                         bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
 580                                        initial_bytes_moved;
 581
 582                         if (unlikely(r)) {
 583                                 if (r != -ERESTARTSYS &&
 584                                     domain != lobj->allowed_domains) {
 585                                         domain = lobj->allowed_domains;
 586                                         goto retry;
 587                                 }
 588                                 ttm_eu_backoff_reservation(ticket, head);
 589                                 return r;
 590                         }
 591                 }
 592                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 593                 lobj->tiling_flags = bo->tiling_flags;
 594         }
 595
 596         list_for_each_entry(lobj, &duplicates, tv.head) {
 597                 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj);
 598                 lobj->tiling_flags = lobj->robj->tiling_flags;
 599         }
 600
 601         return 0;
 602 }
 603
 604 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 605 {
 606         struct radeon_device *rdev = bo->rdev;
 607         struct radeon_surface_reg *reg;
 608         struct radeon_bo *old_object;
 609         int steal;
 610         int i;
 611
 612         lockdep_assert_held(&bo->tbo.resv->lock.base);
 613
 614         if (!bo->tiling_flags)
 615                 return 0;
 616
 617         if (bo->surface_reg >= 0) {
 618                 reg = &rdev->surface_regs[bo->surface_reg];
 619                 i = bo->surface_reg;
 620                 goto out;
 621         }
 622
 623         steal = -1;
 624         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 625
 626                 reg = &rdev->surface_regs[i];
 627                 if (!reg->bo)
 628                         break;
 629
 630                 old_object = reg->bo;
 631                 if (old_object->pin_count == 0)
 632                         steal = i;
 633         }
 634
 635         /* if we are all out */
 636         if (i == RADEON_GEM_MAX_SURFACES) {
 637                 if (steal == -1)
 638                         return -ENOMEM;
 639                 /* find someone with a surface reg and nuke their BO */
 640                 reg = &rdev->surface_regs[steal];
 641                 old_object = reg->bo;
 642                 /* blow away the mapping */
 643                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 644                 ttm_bo_unmap_virtual(&old_object->tbo);
 645                 old_object->surface_reg = -1;
 646                 i = steal;
 647         }
 648
 649         bo->surface_reg = i;
 650         reg->bo = bo;
 651
 652 out:
 653         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 654                                bo->tbo.mem.start << PAGE_SHIFT,
 655                                bo->tbo.num_pages << PAGE_SHIFT);
 656         return 0;
 657 }
 658
 659 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 660 {
 661         struct radeon_device *rdev = bo->rdev;
 662         struct radeon_surface_reg *reg;
 663
 664         if (bo->surface_reg == -1)
 665                 return;
 666
 667         reg = &rdev->surface_regs[bo->surface_reg];
 668         radeon_clear_surface_reg(rdev, bo->surface_reg);
 669
 670         reg->bo = NULL;
 671         bo->surface_reg = -1;
 672 }
 673
 674 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 675                                 uint32_t tiling_flags, uint32_t pitch)
 676 {
 677         struct radeon_device *rdev = bo->rdev;
 678         int r;
 679
 680         if (rdev->family >= CHIP_CEDAR) {
 681                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 682
 683                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 684                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 685                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 686                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 687                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 688                 switch (bankw) {
 689                 case 0:
 690                 case 1:
 691                 case 2:
 692                 case 4:
 693                 case 8:
 694                         break;
 695                 default:
 696                         return -EINVAL;
 697                 }
 698                 switch (bankh) {
 699                 case 0:
 700                 case 1:
 701                 case 2:
 702                 case 4:
 703                 case 8:
 704                         break;
 705                 default:
 706                         return -EINVAL;
 707                 }
 708                 switch (mtaspect) {
 709                 case 0:
 710                 case 1:
 711                 case 2:
 712                 case 4:
 713                 case 8:
 714                         break;
 715                 default:
 716                         return -EINVAL;
 717                 }
 718                 if (tilesplit > 6) {
 719                         return -EINVAL;
 720                 }
 721                 if (stilesplit > 6) {
 722                         return -EINVAL;
 723                 }
 724         }
 725         r = radeon_bo_reserve(bo, false);
 726         if (unlikely(r != 0))
 727                 return r;
 728         bo->tiling_flags = tiling_flags;
 729         bo->pitch = pitch;
 730         radeon_bo_unreserve(bo);
 731         return 0;
 732 }
 733
 734 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 735                                 uint32_t *tiling_flags,
 736                                 uint32_t *pitch)
 737 {
 738         lockdep_assert_held(&bo->tbo.resv->lock.base);
 739
 740         if (tiling_flags)
 741                 *tiling_flags = bo->tiling_flags;
 742         if (pitch)
 743                 *pitch = bo->pitch;
 744 }
 745
 746 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 747                                 bool force_drop)
 748 {
 749         if (!force_drop)
 750                 lockdep_assert_held(&bo->tbo.resv->lock.base);
 751
 752         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 753                 return 0;
 754
 755         if (force_drop) {
 756                 radeon_bo_clear_surface_reg(bo);
 757                 return 0;
 758         }
 759
 760         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 761                 if (!has_moved)
 762                         return 0;
 763
 764                 if (bo->surface_reg >= 0)
 765                         radeon_bo_clear_surface_reg(bo);
 766                 return 0;
 767         }
 768
 769         if ((bo->surface_reg >= 0) && !has_moved)
 770                 return 0;
 771
 772         return radeon_bo_get_surface_reg(bo);
 773 }
 774
 775 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 776                            bool evict,
 777                            struct ttm_mem_reg *new_mem)
 778 {
 779         struct radeon_bo *rbo;
 780
 781         if (!radeon_ttm_bo_is_radeon_bo(bo))
 782                 return;
 783
 784         rbo = container_of(bo, struct radeon_bo, tbo);
 785         radeon_bo_check_tiling(rbo, 0, 1);
 786         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 787
 788         /* update statistics */
 789         if (!new_mem)
 790                 return;
 791
 792         radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
 793         radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
 794 }
 795
 796 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 797 {
 798         struct radeon_device *rdev;
 799         struct radeon_bo *rbo;
 800         unsigned long offset, size, lpfn;
 801         int i, r;
 802
 803         if (!radeon_ttm_bo_is_radeon_bo(bo))
 804                 return 0;
 805         rbo = container_of(bo, struct radeon_bo, tbo);
 806         radeon_bo_check_tiling(rbo, 0, 0);
 807         rdev = rbo->rdev;
 808         if (bo->mem.mem_type != TTM_PL_VRAM)
 809                 return 0;
 810
 811         size = bo->mem.num_pages << PAGE_SHIFT;
 812         offset = bo->mem.start << PAGE_SHIFT;
 813         if ((offset + size) <= rdev->mc.visible_vram_size)
 814                 return 0;
 815
 816         /* Can't move a pinned BO to visible VRAM */
 817         if (rbo->pin_count > 0)
 818                 return -EINVAL;
 819
 820         /* hurrah the memory is not visible ! */
 821         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 822         lpfn =  rdev->mc.visible_vram_size >> PAGE_SHIFT;
 823         for (i = 0; i < rbo->placement.num_placement; i++) {
 824                 /* Force into visible VRAM */
 825                 if ((rbo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 826                     (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn))
 827                         rbo->placements[i].lpfn = lpfn;
 828         }
 829         r = ttm_bo_validate(bo, &rbo->placement, false, false);
 830         if (unlikely(r == -ENOMEM)) {
 831                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 832                 return ttm_bo_validate(bo, &rbo->placement, false, false);
 833         } else if (unlikely(r != 0)) {
 834                 return r;
 835         }
 836
 837         offset = bo->mem.start << PAGE_SHIFT;
 838         /* this should never happen */
 839         if ((offset + size) > rdev->mc.visible_vram_size)
 840                 return -EINVAL;
 841
 842         return 0;
 843 }
 844
 845 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait)
 846 {
 847         int r;
 848
 849         r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
 850         if (unlikely(r != 0))
 851                 return r;
 852         if (mem_type)
 853                 *mem_type = bo->tbo.mem.mem_type;
 854
 855         r = ttm_bo_wait(&bo->tbo, true, no_wait);
 856         ttm_bo_unreserve(&bo->tbo);
 857         return r;
 858 }
 859
 860 /**
 861  * radeon_bo_fence - add fence to buffer object
 862  *
 863  * @bo: buffer object in question
 864  * @fence: fence to add
 865  * @shared: true if fence should be added shared
 866  *
 867  */
 868 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence,
 869                      bool shared)
 870 {
 871         struct reservation_object *resv = bo->tbo.resv;
 872
 873         if (shared)
 874                 reservation_object_add_shared_fence(resv, &fence->base);
 875         else
 876                 reservation_object_add_excl_fence(resv, &fence->base);
 877 }