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
  44 int radeon_ttm_init(struct radeon_device *rdev);
  45 void radeon_ttm_fini(struct radeon_device *rdev);
  46 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  47
  48 /*
  49  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  50  * function are calling it.
  51  */
  52
  53 static void radeon_update_memory_usage(struct radeon_bo *bo,
  54                                        unsigned mem_type, int sign)
  55 {
  56         struct radeon_device *rdev = bo->rdev;
  57         u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
  58
  59         switch (mem_type) {
  60         case TTM_PL_TT:
  61                 if (sign > 0)
  62                         atomic64_add(size, &rdev->gtt_usage);
  63                 else
  64                         atomic64_sub(size, &rdev->gtt_usage);
  65                 break;
  66         case TTM_PL_VRAM:
  67                 if (sign > 0)
  68                         atomic64_add(size, &rdev->vram_usage);
  69                 else
  70                         atomic64_sub(size, &rdev->vram_usage);
  71                 break;
  72         }
  73 }
  74
  75 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  76 {
  77         struct radeon_bo *bo;
  78
  79         bo = container_of(tbo, struct radeon_bo, tbo);
  80
  81         radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
  82
  83         mutex_lock(&bo->rdev->gem.mutex);
  84         list_del_init(&bo->list);
  85         mutex_unlock(&bo->rdev->gem.mutex);
  86         radeon_bo_clear_surface_reg(bo);
  87         WARN_ON_ONCE(!list_empty(&bo->va));
  88         if (bo->tbo.base.import_attach)
  89                 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
  90         drm_gem_object_release(&bo->tbo.base);
  91         kfree(bo);
  92 }
  93
  94 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  95 {
  96         if (bo->destroy == &radeon_ttm_bo_destroy)
  97                 return true;
  98         return false;
  99 }
 100
 101 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 102 {
 103         u32 c = 0, i;
 104
 105         rbo->placement.placement = rbo->placements;
 106         rbo->placement.busy_placement = rbo->placements;
 107         if (domain & RADEON_GEM_DOMAIN_VRAM) {
 108                 /* Try placing BOs which don't need CPU access outside of the
 109                  * CPU accessible part of VRAM
 110                  */
 111                 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 112                     rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) {
 113                         rbo->placements[c].fpfn =
 114                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 115                         rbo->placements[c].mem_type = TTM_PL_VRAM;
 116                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 117                                                      TTM_PL_FLAG_UNCACHED;
 118                 }
 119
 120                 rbo->placements[c].fpfn = 0;
 121                 rbo->placements[c].mem_type = TTM_PL_VRAM;
 122                 rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 123                                              TTM_PL_FLAG_UNCACHED;
 124         }
 125
 126         if (domain & RADEON_GEM_DOMAIN_GTT) {
 127                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 128                         rbo->placements[c].fpfn = 0;
 129                         rbo->placements[c].mem_type = TTM_PL_TT;
 130                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED;
 131
 132                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 133                            (rbo->rdev->flags & RADEON_IS_AGP)) {
 134                         rbo->placements[c].fpfn = 0;
 135                         rbo->placements[c].mem_type = TTM_PL_TT;
 136                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 137                                 TTM_PL_FLAG_UNCACHED;
 138                 } else {
 139                         rbo->placements[c].fpfn = 0;
 140                         rbo->placements[c].mem_type = TTM_PL_TT;
 141                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED;
 142                 }
 143         }
 144
 145         if (domain & RADEON_GEM_DOMAIN_CPU) {
 146                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 147                         rbo->placements[c].fpfn = 0;
 148                         rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 149                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED;
 150
 151                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 152                     rbo->rdev->flags & RADEON_IS_AGP) {
 153                         rbo->placements[c].fpfn = 0;
 154                         rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 155                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 156                                 TTM_PL_FLAG_UNCACHED;
 157                 } else {
 158                         rbo->placements[c].fpfn = 0;
 159                         rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 160                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED;
 161                 }
 162         }
 163         if (!c) {
 164                 rbo->placements[c].fpfn = 0;
 165                 rbo->placements[c].mem_type = TTM_PL_SYSTEM;
 166                 rbo->placements[c++].flags = TTM_PL_MASK_CACHING;
 167         }
 168
 169         rbo->placement.num_placement = c;
 170         rbo->placement.num_busy_placement = c;
 171
 172         for (i = 0; i < c; ++i) {
 173                 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
 174                     (rbo->placements[i].mem_type == TTM_PL_VRAM) &&
 175                     !rbo->placements[i].fpfn)
 176                         rbo->placements[i].lpfn =
 177                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 178                 else
 179                         rbo->placements[i].lpfn = 0;
 180         }
 181 }
 182
 183 int radeon_bo_create(struct radeon_device *rdev,
 184                      unsigned long size, int byte_align, bool kernel,
 185                      u32 domain, u32 flags, struct sg_table *sg,
 186                      struct dma_resv *resv,
 187                      struct radeon_bo **bo_ptr)
 188 {
 189         struct radeon_bo *bo;
 190         enum ttm_bo_type type;
 191         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 192         size_t acc_size;
 193         int r;
 194
 195         size = ALIGN(size, PAGE_SIZE);
 196
 197         if (kernel) {
 198                 type = ttm_bo_type_kernel;
 199         } else if (sg) {
 200                 type = ttm_bo_type_sg;
 201         } else {
 202                 type = ttm_bo_type_device;
 203         }
 204         *bo_ptr = NULL;
 205
 206         acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
 207                                        sizeof(struct radeon_bo));
 208
 209         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 210         if (bo == NULL)
 211                 return -ENOMEM;
 212         drm_gem_private_object_init(rdev->ddev, &bo->tbo.base, size);
 213         bo->rdev = rdev;
 214         bo->surface_reg = -1;
 215         INIT_LIST_HEAD(&bo->list);
 216         INIT_LIST_HEAD(&bo->va);
 217         bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
 218                                        RADEON_GEM_DOMAIN_GTT |
 219                                        RADEON_GEM_DOMAIN_CPU);
 220
 221         bo->flags = flags;
 222         /* PCI GART is always snooped */
 223         if (!(rdev->flags & RADEON_IS_PCIE))
 224                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 225
 226         /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx
 227          * See https://bugs.freedesktop.org/show_bug.cgi?id=91268
 228          */
 229         if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)
 230                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 231
 232 #ifdef CONFIG_X86_32
 233         /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
 234          * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
 235          */
 236         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 237 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
 238         /* Don't try to enable write-combining when it can't work, or things
 239          * may be slow
 240          * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
 241          */
 242 #ifndef CONFIG_COMPILE_TEST
 243 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
 244          thanks to write-combining
 245 #endif
 246
 247         if (bo->flags & RADEON_GEM_GTT_WC)
 248                 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
 249                               "better performance thanks to write-combining\n");
 250         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 251 #else
 252         /* For architectures that don't support WC memory,
 253          * mask out the WC flag from the BO
 254          */
 255         if (!drm_arch_can_wc_memory())
 256                 bo->flags &= ~RADEON_GEM_GTT_WC;
 257 #endif
 258
 259         radeon_ttm_placement_from_domain(bo, domain);
 260         /* Kernel allocation are uninterruptible */
 261         down_read(&rdev->pm.mclk_lock);
 262         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 263                         &bo->placement, page_align, !kernel, acc_size,
 264                         sg, resv, &radeon_ttm_bo_destroy);
 265         up_read(&rdev->pm.mclk_lock);
 266         if (unlikely(r != 0)) {
 267                 return r;
 268         }
 269         *bo_ptr = bo;
 270
 271         trace_radeon_bo_create(bo);
 272
 273         return 0;
 274 }
 275
 276 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 277 {
 278         bool is_iomem;
 279         int r;
 280
 281         if (bo->kptr) {
 282                 if (ptr) {
 283                         *ptr = bo->kptr;
 284                 }
 285                 return 0;
 286         }
 287         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 288         if (r) {
 289                 return r;
 290         }
 291         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 292         if (ptr) {
 293                 *ptr = bo->kptr;
 294         }
 295         radeon_bo_check_tiling(bo, 0, 0);
 296         return 0;
 297 }
 298
 299 void radeon_bo_kunmap(struct radeon_bo *bo)
 300 {
 301         if (bo->kptr == NULL)
 302                 return;
 303         bo->kptr = NULL;
 304         radeon_bo_check_tiling(bo, 0, 0);
 305         ttm_bo_kunmap(&bo->kmap);
 306 }
 307
 308 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
 309 {
 310         if (bo == NULL)
 311                 return NULL;
 312
 313         ttm_bo_get(&bo->tbo);
 314         return bo;
 315 }
 316
 317 void radeon_bo_unref(struct radeon_bo **bo)
 318 {
 319         struct ttm_buffer_object *tbo;
 320
 321         if ((*bo) == NULL)
 322                 return;
 323         tbo = &((*bo)->tbo);
 324         ttm_bo_put(tbo);
 325         *bo = NULL;
 326 }
 327
 328 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 329                              u64 *gpu_addr)
 330 {
 331         struct ttm_operation_ctx ctx = { false, false };
 332         int r, i;
 333
 334         if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
 335                 return -EPERM;
 336
 337         if (bo->pin_count) {
 338                 bo->pin_count++;
 339                 if (gpu_addr)
 340                         *gpu_addr = radeon_bo_gpu_offset(bo);
 341
 342                 if (max_offset != 0) {
 343                         u64 domain_start;
 344
 345                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 346                                 domain_start = bo->rdev->mc.vram_start;
 347                         else
 348                                 domain_start = bo->rdev->mc.gtt_start;
 349                         WARN_ON_ONCE(max_offset <
 350                                      (radeon_bo_gpu_offset(bo) - domain_start));
 351                 }
 352
 353                 return 0;
 354         }
 355         if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) {
 356                 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */
 357                 return -EINVAL;
 358         }
 359
 360         radeon_ttm_placement_from_domain(bo, domain);
 361         for (i = 0; i < bo->placement.num_placement; i++) {
 362                 /* force to pin into visible video ram */
 363                 if ((bo->placements[i].mem_type == TTM_PL_VRAM) &&
 364                     !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 365                     (!max_offset || max_offset > bo->rdev->mc.visible_vram_size))
 366                         bo->placements[i].lpfn =
 367                                 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 368                 else
 369                         bo->placements[i].lpfn = max_offset >> PAGE_SHIFT;
 370
 371                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 372         }
 373
 374         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 375         if (likely(r == 0)) {
 376                 bo->pin_count = 1;
 377                 if (gpu_addr != NULL)
 378                         *gpu_addr = radeon_bo_gpu_offset(bo);
 379                 if (domain == RADEON_GEM_DOMAIN_VRAM)
 380                         bo->rdev->vram_pin_size += radeon_bo_size(bo);
 381                 else
 382                         bo->rdev->gart_pin_size += radeon_bo_size(bo);
 383         } else {
 384                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 385         }
 386         return r;
 387 }
 388
 389 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 390 {
 391         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 392 }
 393
 394 int radeon_bo_unpin(struct radeon_bo *bo)
 395 {
 396         struct ttm_operation_ctx ctx = { false, false };
 397         int r, i;
 398
 399         if (!bo->pin_count) {
 400                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 401                 return 0;
 402         }
 403         bo->pin_count--;
 404         if (bo->pin_count)
 405                 return 0;
 406         for (i = 0; i < bo->placement.num_placement; i++) {
 407                 bo->placements[i].lpfn = 0;
 408                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 409         }
 410         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 411         if (likely(r == 0)) {
 412                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 413                         bo->rdev->vram_pin_size -= radeon_bo_size(bo);
 414                 else
 415                         bo->rdev->gart_pin_size -= radeon_bo_size(bo);
 416         } else {
 417                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 418         }
 419         return r;
 420 }
 421
 422 int radeon_bo_evict_vram(struct radeon_device *rdev)
 423 {
 424         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 425 #ifndef CONFIG_HIBERNATION
 426         if (rdev->flags & RADEON_IS_IGP) {
 427                 if (rdev->mc.igp_sideport_enabled == false)
 428                         /* Useless to evict on IGP chips */
 429                         return 0;
 430         }
 431 #endif
 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->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 446                         *((unsigned long *)&bo->tbo.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(&bo->tbo.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 ttm_operation_ctx ctx = { true, false };
 538         struct radeon_bo_list *lobj;
 539         struct list_head duplicates;
 540         int r;
 541         u64 bytes_moved = 0, initial_bytes_moved;
 542         u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
 543
 544         INIT_LIST_HEAD(&duplicates);
 545         r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates);
 546         if (unlikely(r != 0)) {
 547                 return r;
 548         }
 549
 550         list_for_each_entry(lobj, head, tv.head) {
 551                 struct radeon_bo *bo = lobj->robj;
 552                 if (!bo->pin_count) {
 553                         u32 domain = lobj->preferred_domains;
 554                         u32 allowed = lobj->allowed_domains;
 555                         u32 current_domain =
 556                                 radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
 557
 558                         /* Check if this buffer will be moved and don't move it
 559                          * if we have moved too many buffers for this IB already.
 560                          *
 561                          * Note that this allows moving at least one buffer of
 562                          * any size, because it doesn't take the current "bo"
 563                          * into account. We don't want to disallow buffer moves
 564                          * completely.
 565                          */
 566                         if ((allowed & current_domain) != 0 &&
 567                             (domain & current_domain) == 0 && /* will be moved */
 568                             bytes_moved > bytes_moved_threshold) {
 569                                 /* don't move it */
 570                                 domain = current_domain;
 571                         }
 572
 573                 retry:
 574                         radeon_ttm_placement_from_domain(bo, domain);
 575                         if (ring == R600_RING_TYPE_UVD_INDEX)
 576                                 radeon_uvd_force_into_uvd_segment(bo, allowed);
 577
 578                         initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
 579                         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 580                         bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
 581                                        initial_bytes_moved;
 582
 583                         if (unlikely(r)) {
 584                                 if (r != -ERESTARTSYS &&
 585                                     domain != lobj->allowed_domains) {
 586                                         domain = lobj->allowed_domains;
 587                                         goto retry;
 588                                 }
 589                                 ttm_eu_backoff_reservation(ticket, head);
 590                                 return r;
 591                         }
 592                 }
 593                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 594                 lobj->tiling_flags = bo->tiling_flags;
 595         }
 596
 597         list_for_each_entry(lobj, &duplicates, tv.head) {
 598                 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj);
 599                 lobj->tiling_flags = lobj->robj->tiling_flags;
 600         }
 601
 602         return 0;
 603 }
 604
 605 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 606 {
 607         struct radeon_device *rdev = bo->rdev;
 608         struct radeon_surface_reg *reg;
 609         struct radeon_bo *old_object;
 610         int steal;
 611         int i;
 612
 613         dma_resv_assert_held(bo->tbo.base.resv);
 614
 615         if (!bo->tiling_flags)
 616                 return 0;
 617
 618         if (bo->surface_reg >= 0) {
 619                 reg = &rdev->surface_regs[bo->surface_reg];
 620                 i = bo->surface_reg;
 621                 goto out;
 622         }
 623
 624         steal = -1;
 625         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 626
 627                 reg = &rdev->surface_regs[i];
 628                 if (!reg->bo)
 629                         break;
 630
 631                 old_object = reg->bo;
 632                 if (old_object->pin_count == 0)
 633                         steal = i;
 634         }
 635
 636         /* if we are all out */
 637         if (i == RADEON_GEM_MAX_SURFACES) {
 638                 if (steal == -1)
 639                         return -ENOMEM;
 640                 /* find someone with a surface reg and nuke their BO */
 641                 reg = &rdev->surface_regs[steal];
 642                 old_object = reg->bo;
 643                 /* blow away the mapping */
 644                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 645                 ttm_bo_unmap_virtual(&old_object->tbo);
 646                 old_object->surface_reg = -1;
 647                 i = steal;
 648         }
 649
 650         bo->surface_reg = i;
 651         reg->bo = bo;
 652
 653 out:
 654         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 655                                bo->tbo.mem.start << PAGE_SHIFT,
 656                                bo->tbo.num_pages << PAGE_SHIFT);
 657         return 0;
 658 }
 659
 660 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 661 {
 662         struct radeon_device *rdev = bo->rdev;
 663         struct radeon_surface_reg *reg;
 664
 665         if (bo->surface_reg == -1)
 666                 return;
 667
 668         reg = &rdev->surface_regs[bo->surface_reg];
 669         radeon_clear_surface_reg(rdev, bo->surface_reg);
 670
 671         reg->bo = NULL;
 672         bo->surface_reg = -1;
 673 }
 674
 675 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 676                                 uint32_t tiling_flags, uint32_t pitch)
 677 {
 678         struct radeon_device *rdev = bo->rdev;
 679         int r;
 680
 681         if (rdev->family >= CHIP_CEDAR) {
 682                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 683
 684                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 685                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 686                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 687                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 688                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 689                 switch (bankw) {
 690                 case 0:
 691                 case 1:
 692                 case 2:
 693                 case 4:
 694                 case 8:
 695                         break;
 696                 default:
 697                         return -EINVAL;
 698                 }
 699                 switch (bankh) {
 700                 case 0:
 701                 case 1:
 702                 case 2:
 703                 case 4:
 704                 case 8:
 705                         break;
 706                 default:
 707                         return -EINVAL;
 708                 }
 709                 switch (mtaspect) {
 710                 case 0:
 711                 case 1:
 712                 case 2:
 713                 case 4:
 714                 case 8:
 715                         break;
 716                 default:
 717                         return -EINVAL;
 718                 }
 719                 if (tilesplit > 6) {
 720                         return -EINVAL;
 721                 }
 722                 if (stilesplit > 6) {
 723                         return -EINVAL;
 724                 }
 725         }
 726         r = radeon_bo_reserve(bo, false);
 727         if (unlikely(r != 0))
 728                 return r;
 729         bo->tiling_flags = tiling_flags;
 730         bo->pitch = pitch;
 731         radeon_bo_unreserve(bo);
 732         return 0;
 733 }
 734
 735 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 736                                 uint32_t *tiling_flags,
 737                                 uint32_t *pitch)
 738 {
 739         dma_resv_assert_held(bo->tbo.base.resv);
 740
 741         if (tiling_flags)
 742                 *tiling_flags = bo->tiling_flags;
 743         if (pitch)
 744                 *pitch = bo->pitch;
 745 }
 746
 747 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 748                                 bool force_drop)
 749 {
 750         if (!force_drop)
 751                 dma_resv_assert_held(bo->tbo.base.resv);
 752
 753         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 754                 return 0;
 755
 756         if (force_drop) {
 757                 radeon_bo_clear_surface_reg(bo);
 758                 return 0;
 759         }
 760
 761         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 762                 if (!has_moved)
 763                         return 0;
 764
 765                 if (bo->surface_reg >= 0)
 766                         radeon_bo_clear_surface_reg(bo);
 767                 return 0;
 768         }
 769
 770         if ((bo->surface_reg >= 0) && !has_moved)
 771                 return 0;
 772
 773         return radeon_bo_get_surface_reg(bo);
 774 }
 775
 776 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 777                            bool evict,
 778                            struct ttm_resource *new_mem)
 779 {
 780         struct radeon_bo *rbo;
 781
 782         if (!radeon_ttm_bo_is_radeon_bo(bo))
 783                 return;
 784
 785         rbo = container_of(bo, struct radeon_bo, tbo);
 786         radeon_bo_check_tiling(rbo, 0, 1);
 787         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 788
 789         /* update statistics */
 790         if (!new_mem)
 791                 return;
 792
 793         radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
 794         radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
 795 }
 796
 797 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 798 {
 799         struct ttm_operation_ctx ctx = { false, false };
 800         struct radeon_device *rdev;
 801         struct radeon_bo *rbo;
 802         unsigned long offset, size, lpfn;
 803         int i, r;
 804
 805         if (!radeon_ttm_bo_is_radeon_bo(bo))
 806                 return 0;
 807         rbo = container_of(bo, struct radeon_bo, tbo);
 808         radeon_bo_check_tiling(rbo, 0, 0);
 809         rdev = rbo->rdev;
 810         if (bo->mem.mem_type != TTM_PL_VRAM)
 811                 return 0;
 812
 813         size = bo->mem.num_pages << PAGE_SHIFT;
 814         offset = bo->mem.start << PAGE_SHIFT;
 815         if ((offset + size) <= rdev->mc.visible_vram_size)
 816                 return 0;
 817
 818         /* Can't move a pinned BO to visible VRAM */
 819         if (rbo->pin_count > 0)
 820                 return -EINVAL;
 821
 822         /* hurrah the memory is not visible ! */
 823         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 824         lpfn =  rdev->mc.visible_vram_size >> PAGE_SHIFT;
 825         for (i = 0; i < rbo->placement.num_placement; i++) {
 826                 /* Force into visible VRAM */
 827                 if ((rbo->placements[i].mem_type == TTM_PL_VRAM) &&
 828                     (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn))
 829                         rbo->placements[i].lpfn = lpfn;
 830         }
 831         r = ttm_bo_validate(bo, &rbo->placement, &ctx);
 832         if (unlikely(r == -ENOMEM)) {
 833                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 834                 return ttm_bo_validate(bo, &rbo->placement, &ctx);
 835         } else if (unlikely(r != 0)) {
 836                 return r;
 837         }
 838
 839         offset = bo->mem.start << PAGE_SHIFT;
 840         /* this should never happen */
 841         if ((offset + size) > rdev->mc.visible_vram_size)
 842                 return -EINVAL;
 843
 844         return 0;
 845 }
 846
 847 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait)
 848 {
 849         int r;
 850
 851         r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
 852         if (unlikely(r != 0))
 853                 return r;
 854         if (mem_type)
 855                 *mem_type = bo->tbo.mem.mem_type;
 856
 857         r = ttm_bo_wait(&bo->tbo, true, no_wait);
 858         ttm_bo_unreserve(&bo->tbo);
 859         return r;
 860 }
 861
 862 /**
 863  * radeon_bo_fence - add fence to buffer object
 864  *
 865  * @bo: buffer object in question
 866  * @fence: fence to add
 867  * @shared: true if fence should be added shared
 868  *
 869  */
 870 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence,
 871                      bool shared)
 872 {
 873         struct dma_resv *resv = bo->tbo.base.resv;
 874
 875         if (shared)
 876                 dma_resv_add_shared_fence(resv, &fence->base);
 877         else
 878                 dma_resv_add_excl_fence(resv, &fence->base);
 879 }