drivers/gpu/drm/radeon/radeon_object.c

   1 /*
   2  * Copyright 2009 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Jerome Glisse <glisse@freedesktop.org>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32 #include <linux/list.h>
  33 #include <linux/slab.h>
  34 #include <drm/drmP.h>
  35 #include <drm/radeon_drm.h>
  36 #include "radeon.h"
  37 #include "radeon_trace.h"
  38
  39
  40 int radeon_ttm_init(struct radeon_device *rdev);
  41 void radeon_ttm_fini(struct radeon_device *rdev);
  42 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo);
  43
  44 /*
  45  * To exclude mutual BO access we rely on bo_reserve exclusion, as all
  46  * function are calling it.
  47  */
  48
  49 static void radeon_update_memory_usage(struct radeon_bo *bo,
  50                                        unsigned mem_type, int sign)
  51 {
  52         struct radeon_device *rdev = bo->rdev;
  53         u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
  54
  55         switch (mem_type) {
  56         case TTM_PL_TT:
  57                 if (sign > 0)
  58                         atomic64_add(size, &rdev->gtt_usage);
  59                 else
  60                         atomic64_sub(size, &rdev->gtt_usage);
  61                 break;
  62         case TTM_PL_VRAM:
  63                 if (sign > 0)
  64                         atomic64_add(size, &rdev->vram_usage);
  65                 else
  66                         atomic64_sub(size, &rdev->vram_usage);
  67                 break;
  68         }
  69 }
  70
  71 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  72 {
  73         struct radeon_bo *bo;
  74
  75         bo = container_of(tbo, struct radeon_bo, tbo);
  76
  77         radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
  78         radeon_mn_unregister(bo);
  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(!list_empty(&bo->va));
  85         drm_gem_object_release(&bo->gem_base);
  86         kfree(bo);
  87 }
  88
  89 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
  90 {
  91         if (bo->destroy == &radeon_ttm_bo_destroy)
  92                 return true;
  93         return false;
  94 }
  95
  96 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
  97 {
  98         u32 c = 0, i;
  99
 100         rbo->placement.placement = rbo->placements;
 101         rbo->placement.busy_placement = rbo->placements;
 102         if (domain & RADEON_GEM_DOMAIN_VRAM) {
 103                 /* Try placing BOs which don't need CPU access outside of the
 104                  * CPU accessible part of VRAM
 105                  */
 106                 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 107                     rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) {
 108                         rbo->placements[c].fpfn =
 109                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 110                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 111                                                      TTM_PL_FLAG_UNCACHED |
 112                                                      TTM_PL_FLAG_VRAM;
 113                 }
 114
 115                 rbo->placements[c].fpfn = 0;
 116                 rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 117                                              TTM_PL_FLAG_UNCACHED |
 118                                              TTM_PL_FLAG_VRAM;
 119         }
 120
 121         if (domain & RADEON_GEM_DOMAIN_GTT) {
 122                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 123                         rbo->placements[c].fpfn = 0;
 124                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 125                                 TTM_PL_FLAG_TT;
 126
 127                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 128                            (rbo->rdev->flags & RADEON_IS_AGP)) {
 129                         rbo->placements[c].fpfn = 0;
 130                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 131                                 TTM_PL_FLAG_UNCACHED |
 132                                 TTM_PL_FLAG_TT;
 133                 } else {
 134                         rbo->placements[c].fpfn = 0;
 135                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED |
 136                                                      TTM_PL_FLAG_TT;
 137                 }
 138         }
 139
 140         if (domain & RADEON_GEM_DOMAIN_CPU) {
 141                 if (rbo->flags & RADEON_GEM_GTT_UC) {
 142                         rbo->placements[c].fpfn = 0;
 143                         rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED |
 144                                 TTM_PL_FLAG_SYSTEM;
 145
 146                 } else if ((rbo->flags & RADEON_GEM_GTT_WC) ||
 147                     rbo->rdev->flags & RADEON_IS_AGP) {
 148                         rbo->placements[c].fpfn = 0;
 149                         rbo->placements[c++].flags = TTM_PL_FLAG_WC |
 150                                 TTM_PL_FLAG_UNCACHED |
 151                                 TTM_PL_FLAG_SYSTEM;
 152                 } else {
 153                         rbo->placements[c].fpfn = 0;
 154                         rbo->placements[c++].flags = TTM_PL_FLAG_CACHED |
 155                                                      TTM_PL_FLAG_SYSTEM;
 156                 }
 157         }
 158         if (!c) {
 159                 rbo->placements[c].fpfn = 0;
 160                 rbo->placements[c++].flags = TTM_PL_MASK_CACHING |
 161                                              TTM_PL_FLAG_SYSTEM;
 162         }
 163
 164         rbo->placement.num_placement = c;
 165         rbo->placement.num_busy_placement = c;
 166
 167         for (i = 0; i < c; ++i) {
 168                 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
 169                     (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 170                     !rbo->placements[i].fpfn)
 171                         rbo->placements[i].lpfn =
 172                                 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 173                 else
 174                         rbo->placements[i].lpfn = 0;
 175         }
 176
 177         /*
 178          * Use two-ended allocation depending on the buffer size to
 179          * improve fragmentation quality.
 180          * 512kb was measured as the most optimal number.
 181          */
 182         if (rbo->tbo.mem.size > 512 * 1024) {
 183                 for (i = 0; i < c; i++) {
 184                         rbo->placements[i].flags |= TTM_PL_FLAG_TOPDOWN;
 185                 }
 186         }
 187 }
 188
 189 int radeon_bo_create(struct radeon_device *rdev,
 190                      unsigned long size, int byte_align, bool kernel,
 191                      u32 domain, u32 flags, struct sg_table *sg,
 192                      struct reservation_object *resv,
 193                      struct radeon_bo **bo_ptr)
 194 {
 195         struct radeon_bo *bo;
 196         enum ttm_bo_type type;
 197         unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
 198         size_t acc_size;
 199         int r;
 200
 201         size = ALIGN(size, PAGE_SIZE);
 202
 203         if (kernel) {
 204                 type = ttm_bo_type_kernel;
 205         } else if (sg) {
 206                 type = ttm_bo_type_sg;
 207         } else {
 208                 type = ttm_bo_type_device;
 209         }
 210         *bo_ptr = NULL;
 211
 212         acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size,
 213                                        sizeof(struct radeon_bo));
 214
 215         bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
 216         if (bo == NULL)
 217                 return -ENOMEM;
 218         r = drm_gem_object_init(rdev->ddev, &bo->gem_base, size);
 219         if (unlikely(r)) {
 220                 kfree(bo);
 221                 return r;
 222         }
 223         bo->rdev = rdev;
 224         bo->surface_reg = -1;
 225         INIT_LIST_HEAD(&bo->list);
 226         INIT_LIST_HEAD(&bo->va);
 227         bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM |
 228                                        RADEON_GEM_DOMAIN_GTT |
 229                                        RADEON_GEM_DOMAIN_CPU);
 230
 231         bo->flags = flags;
 232         /* PCI GART is always snooped */
 233         if (!(rdev->flags & RADEON_IS_PCIE))
 234                 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 235
 236 #ifdef CONFIG_X86_32
 237         /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
 238          * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
 239          */
 240         bo->flags &= ~RADEON_GEM_GTT_WC;
 241 #endif
 242
 243         radeon_ttm_placement_from_domain(bo, domain);
 244         /* Kernel allocation are uninterruptible */
 245         down_read(&rdev->pm.mclk_lock);
 246         r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
 247                         &bo->placement, page_align, !kernel, NULL,
 248                         acc_size, sg, resv, &radeon_ttm_bo_destroy);
 249         up_read(&rdev->pm.mclk_lock);
 250         if (unlikely(r != 0)) {
 251                 return r;
 252         }
 253         *bo_ptr = bo;
 254
 255         trace_radeon_bo_create(bo);
 256
 257         return 0;
 258 }
 259
 260 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr)
 261 {
 262         bool is_iomem;
 263         int r;
 264
 265         if (bo->kptr) {
 266                 if (ptr) {
 267                         *ptr = bo->kptr;
 268                 }
 269                 return 0;
 270         }
 271         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 272         if (r) {
 273                 return r;
 274         }
 275         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 276         if (ptr) {
 277                 *ptr = bo->kptr;
 278         }
 279         radeon_bo_check_tiling(bo, 0, 0);
 280         return 0;
 281 }
 282
 283 void radeon_bo_kunmap(struct radeon_bo *bo)
 284 {
 285         if (bo->kptr == NULL)
 286                 return;
 287         bo->kptr = NULL;
 288         radeon_bo_check_tiling(bo, 0, 0);
 289         ttm_bo_kunmap(&bo->kmap);
 290 }
 291
 292 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo)
 293 {
 294         if (bo == NULL)
 295                 return NULL;
 296
 297         ttm_bo_reference(&bo->tbo);
 298         return bo;
 299 }
 300
 301 void radeon_bo_unref(struct radeon_bo **bo)
 302 {
 303         struct ttm_buffer_object *tbo;
 304         struct radeon_device *rdev;
 305
 306         if ((*bo) == NULL)
 307                 return;
 308         rdev = (*bo)->rdev;
 309         tbo = &((*bo)->tbo);
 310         ttm_bo_unref(&tbo);
 311         if (tbo == NULL)
 312                 *bo = NULL;
 313 }
 314
 315 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 316                              u64 *gpu_addr)
 317 {
 318         int r, i;
 319
 320         if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
 321                 return -EPERM;
 322
 323         if (bo->pin_count) {
 324                 bo->pin_count++;
 325                 if (gpu_addr)
 326                         *gpu_addr = radeon_bo_gpu_offset(bo);
 327
 328                 if (max_offset != 0) {
 329                         u64 domain_start;
 330
 331                         if (domain == RADEON_GEM_DOMAIN_VRAM)
 332                                 domain_start = bo->rdev->mc.vram_start;
 333                         else
 334                                 domain_start = bo->rdev->mc.gtt_start;
 335                         WARN_ON_ONCE(max_offset <
 336                                      (radeon_bo_gpu_offset(bo) - domain_start));
 337                 }
 338
 339                 return 0;
 340         }
 341         radeon_ttm_placement_from_domain(bo, domain);
 342         for (i = 0; i < bo->placement.num_placement; i++) {
 343                 /* force to pin into visible video ram */
 344                 if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 345                     !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) &&
 346                     (!max_offset || max_offset > bo->rdev->mc.visible_vram_size))
 347                         bo->placements[i].lpfn =
 348                                 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 349                 else
 350                         bo->placements[i].lpfn = max_offset >> PAGE_SHIFT;
 351
 352                 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
 353         }
 354
 355         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 356         if (likely(r == 0)) {
 357                 bo->pin_count = 1;
 358                 if (gpu_addr != NULL)
 359                         *gpu_addr = radeon_bo_gpu_offset(bo);
 360                 if (domain == RADEON_GEM_DOMAIN_VRAM)
 361                         bo->rdev->vram_pin_size += radeon_bo_size(bo);
 362                 else
 363                         bo->rdev->gart_pin_size += radeon_bo_size(bo);
 364         } else {
 365                 dev_err(bo->rdev->dev, "%p pin failed\n", bo);
 366         }
 367         return r;
 368 }
 369
 370 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr)
 371 {
 372         return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr);
 373 }
 374
 375 int radeon_bo_unpin(struct radeon_bo *bo)
 376 {
 377         int r, i;
 378
 379         if (!bo->pin_count) {
 380                 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo);
 381                 return 0;
 382         }
 383         bo->pin_count--;
 384         if (bo->pin_count)
 385                 return 0;
 386         for (i = 0; i < bo->placement.num_placement; i++) {
 387                 bo->placements[i].lpfn = 0;
 388                 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 389         }
 390         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 391         if (likely(r == 0)) {
 392                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 393                         bo->rdev->vram_pin_size -= radeon_bo_size(bo);
 394                 else
 395                         bo->rdev->gart_pin_size -= radeon_bo_size(bo);
 396         } else {
 397                 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
 398         }
 399         return r;
 400 }
 401
 402 int radeon_bo_evict_vram(struct radeon_device *rdev)
 403 {
 404         /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
 405         if (0 && (rdev->flags & RADEON_IS_IGP)) {
 406                 if (rdev->mc.igp_sideport_enabled == false)
 407                         /* Useless to evict on IGP chips */
 408                         return 0;
 409         }
 410         return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM);
 411 }
 412
 413 void radeon_bo_force_delete(struct radeon_device *rdev)
 414 {
 415         struct radeon_bo *bo, *n;
 416
 417         if (list_empty(&rdev->gem.objects)) {
 418                 return;
 419         }
 420         dev_err(rdev->dev, "Userspace still has active objects !\n");
 421         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 422                 mutex_lock(&rdev->ddev->struct_mutex);
 423                 dev_err(rdev->dev, "%p %p %lu %lu force free\n",
 424                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 425                         *((unsigned long *)&bo->gem_base.refcount));
 426                 mutex_lock(&bo->rdev->gem.mutex);
 427                 list_del_init(&bo->list);
 428                 mutex_unlock(&bo->rdev->gem.mutex);
 429                 /* this should unref the ttm bo */
 430                 drm_gem_object_unreference(&bo->gem_base);
 431                 mutex_unlock(&rdev->ddev->struct_mutex);
 432         }
 433 }
 434
 435 int radeon_bo_init(struct radeon_device *rdev)
 436 {
 437         /* Add an MTRR for the VRAM */
 438         if (!rdev->fastfb_working) {
 439                 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base,
 440                                                       rdev->mc.aper_size);
 441         }
 442         DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
 443                 rdev->mc.mc_vram_size >> 20,
 444                 (unsigned long long)rdev->mc.aper_size >> 20);
 445         DRM_INFO("RAM width %dbits %cDR\n",
 446                         rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S');
 447         return radeon_ttm_init(rdev);
 448 }
 449
 450 void radeon_bo_fini(struct radeon_device *rdev)
 451 {
 452         radeon_ttm_fini(rdev);
 453         arch_phys_wc_del(rdev->mc.vram_mtrr);
 454 }
 455
 456 /* Returns how many bytes TTM can move per IB.
 457  */
 458 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev)
 459 {
 460         u64 real_vram_size = rdev->mc.real_vram_size;
 461         u64 vram_usage = atomic64_read(&rdev->vram_usage);
 462
 463         /* This function is based on the current VRAM usage.
 464          *
 465          * - If all of VRAM is free, allow relocating the number of bytes that
 466          *   is equal to 1/4 of the size of VRAM for this IB.
 467
 468          * - If more than one half of VRAM is occupied, only allow relocating
 469          *   1 MB of data for this IB.
 470          *
 471          * - From 0 to one half of used VRAM, the threshold decreases
 472          *   linearly.
 473          *         __________________
 474          * 1/4 of -|\               |
 475          * VRAM    | \              |
 476          *         |  \             |
 477          *         |   \            |
 478          *         |    \           |
 479          *         |     \          |
 480          *         |      \         |
 481          *         |       \________|1 MB
 482          *         |----------------|
 483          *    VRAM 0 %             100 %
 484          *         used            used
 485          *
 486          * Note: It's a threshold, not a limit. The threshold must be crossed
 487          * for buffer relocations to stop, so any buffer of an arbitrary size
 488          * can be moved as long as the threshold isn't crossed before
 489          * the relocation takes place. We don't want to disable buffer
 490          * relocations completely.
 491          *
 492          * The idea is that buffers should be placed in VRAM at creation time
 493          * and TTM should only do a minimum number of relocations during
 494          * command submission. In practice, you need to submit at least
 495          * a dozen IBs to move all buffers to VRAM if they are in GTT.
 496          *
 497          * Also, things can get pretty crazy under memory pressure and actual
 498          * VRAM usage can change a lot, so playing safe even at 50% does
 499          * consistently increase performance.
 500          */
 501
 502         u64 half_vram = real_vram_size >> 1;
 503         u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage;
 504         u64 bytes_moved_threshold = half_free_vram >> 1;
 505         return max(bytes_moved_threshold, 1024*1024ull);
 506 }
 507
 508 int radeon_bo_list_validate(struct radeon_device *rdev,
 509                             struct ww_acquire_ctx *ticket,
 510                             struct list_head *head, int ring)
 511 {
 512         struct radeon_bo_list *lobj;
 513         struct list_head duplicates;
 514         int r;
 515         u64 bytes_moved = 0, initial_bytes_moved;
 516         u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev);
 517
 518         INIT_LIST_HEAD(&duplicates);
 519         r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates);
 520         if (unlikely(r != 0)) {
 521                 return r;
 522         }
 523
 524         list_for_each_entry(lobj, head, tv.head) {
 525                 struct radeon_bo *bo = lobj->robj;
 526                 if (!bo->pin_count) {
 527                         u32 domain = lobj->prefered_domains;
 528                         u32 allowed = lobj->allowed_domains;
 529                         u32 current_domain =
 530                                 radeon_mem_type_to_domain(bo->tbo.mem.mem_type);
 531
 532                         /* Check if this buffer will be moved and don't move it
 533                          * if we have moved too many buffers for this IB already.
 534                          *
 535                          * Note that this allows moving at least one buffer of
 536                          * any size, because it doesn't take the current "bo"
 537                          * into account. We don't want to disallow buffer moves
 538                          * completely.
 539                          */
 540                         if ((allowed & current_domain) != 0 &&
 541                             (domain & current_domain) == 0 && /* will be moved */
 542                             bytes_moved > bytes_moved_threshold) {
 543                                 /* don't move it */
 544                                 domain = current_domain;
 545                         }
 546
 547                 retry:
 548                         radeon_ttm_placement_from_domain(bo, domain);
 549                         if (ring == R600_RING_TYPE_UVD_INDEX)
 550                                 radeon_uvd_force_into_uvd_segment(bo, allowed);
 551
 552                         initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved);
 553                         r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 554                         bytes_moved += atomic64_read(&rdev->num_bytes_moved) -
 555                                        initial_bytes_moved;
 556
 557                         if (unlikely(r)) {
 558                                 if (r != -ERESTARTSYS &&
 559                                     domain != lobj->allowed_domains) {
 560                                         domain = lobj->allowed_domains;
 561                                         goto retry;
 562                                 }
 563                                 ttm_eu_backoff_reservation(ticket, head);
 564                                 return r;
 565                         }
 566                 }
 567                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
 568                 lobj->tiling_flags = bo->tiling_flags;
 569         }
 570
 571         list_for_each_entry(lobj, &duplicates, tv.head) {
 572                 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj);
 573                 lobj->tiling_flags = lobj->robj->tiling_flags;
 574         }
 575
 576         return 0;
 577 }
 578
 579 int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
 580                              struct vm_area_struct *vma)
 581 {
 582         return ttm_fbdev_mmap(vma, &bo->tbo);
 583 }
 584
 585 int radeon_bo_get_surface_reg(struct radeon_bo *bo)
 586 {
 587         struct radeon_device *rdev = bo->rdev;
 588         struct radeon_surface_reg *reg;
 589         struct radeon_bo *old_object;
 590         int steal;
 591         int i;
 592
 593         lockdep_assert_held(&bo->tbo.resv->lock.base);
 594
 595         if (!bo->tiling_flags)
 596                 return 0;
 597
 598         if (bo->surface_reg >= 0) {
 599                 reg = &rdev->surface_regs[bo->surface_reg];
 600                 i = bo->surface_reg;
 601                 goto out;
 602         }
 603
 604         steal = -1;
 605         for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
 606
 607                 reg = &rdev->surface_regs[i];
 608                 if (!reg->bo)
 609                         break;
 610
 611                 old_object = reg->bo;
 612                 if (old_object->pin_count == 0)
 613                         steal = i;
 614         }
 615
 616         /* if we are all out */
 617         if (i == RADEON_GEM_MAX_SURFACES) {
 618                 if (steal == -1)
 619                         return -ENOMEM;
 620                 /* find someone with a surface reg and nuke their BO */
 621                 reg = &rdev->surface_regs[steal];
 622                 old_object = reg->bo;
 623                 /* blow away the mapping */
 624                 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object);
 625                 ttm_bo_unmap_virtual(&old_object->tbo);
 626                 old_object->surface_reg = -1;
 627                 i = steal;
 628         }
 629
 630         bo->surface_reg = i;
 631         reg->bo = bo;
 632
 633 out:
 634         radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch,
 635                                bo->tbo.mem.start << PAGE_SHIFT,
 636                                bo->tbo.num_pages << PAGE_SHIFT);
 637         return 0;
 638 }
 639
 640 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo)
 641 {
 642         struct radeon_device *rdev = bo->rdev;
 643         struct radeon_surface_reg *reg;
 644
 645         if (bo->surface_reg == -1)
 646                 return;
 647
 648         reg = &rdev->surface_regs[bo->surface_reg];
 649         radeon_clear_surface_reg(rdev, bo->surface_reg);
 650
 651         reg->bo = NULL;
 652         bo->surface_reg = -1;
 653 }
 654
 655 int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
 656                                 uint32_t tiling_flags, uint32_t pitch)
 657 {
 658         struct radeon_device *rdev = bo->rdev;
 659         int r;
 660
 661         if (rdev->family >= CHIP_CEDAR) {
 662                 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit;
 663
 664                 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK;
 665                 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK;
 666                 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK;
 667                 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK;
 668                 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK;
 669                 switch (bankw) {
 670                 case 0:
 671                 case 1:
 672                 case 2:
 673                 case 4:
 674                 case 8:
 675                         break;
 676                 default:
 677                         return -EINVAL;
 678                 }
 679                 switch (bankh) {
 680                 case 0:
 681                 case 1:
 682                 case 2:
 683                 case 4:
 684                 case 8:
 685                         break;
 686                 default:
 687                         return -EINVAL;
 688                 }
 689                 switch (mtaspect) {
 690                 case 0:
 691                 case 1:
 692                 case 2:
 693                 case 4:
 694                 case 8:
 695                         break;
 696                 default:
 697                         return -EINVAL;
 698                 }
 699                 if (tilesplit > 6) {
 700                         return -EINVAL;
 701                 }
 702                 if (stilesplit > 6) {
 703                         return -EINVAL;
 704                 }
 705         }
 706         r = radeon_bo_reserve(bo, false);
 707         if (unlikely(r != 0))
 708                 return r;
 709         bo->tiling_flags = tiling_flags;
 710         bo->pitch = pitch;
 711         radeon_bo_unreserve(bo);
 712         return 0;
 713 }
 714
 715 void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
 716                                 uint32_t *tiling_flags,
 717                                 uint32_t *pitch)
 718 {
 719         lockdep_assert_held(&bo->tbo.resv->lock.base);
 720
 721         if (tiling_flags)
 722                 *tiling_flags = bo->tiling_flags;
 723         if (pitch)
 724                 *pitch = bo->pitch;
 725 }
 726
 727 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
 728                                 bool force_drop)
 729 {
 730         if (!force_drop)
 731                 lockdep_assert_held(&bo->tbo.resv->lock.base);
 732
 733         if (!(bo->tiling_flags & RADEON_TILING_SURFACE))
 734                 return 0;
 735
 736         if (force_drop) {
 737                 radeon_bo_clear_surface_reg(bo);
 738                 return 0;
 739         }
 740
 741         if (bo->tbo.mem.mem_type != TTM_PL_VRAM) {
 742                 if (!has_moved)
 743                         return 0;
 744
 745                 if (bo->surface_reg >= 0)
 746                         radeon_bo_clear_surface_reg(bo);
 747                 return 0;
 748         }
 749
 750         if ((bo->surface_reg >= 0) && !has_moved)
 751                 return 0;
 752
 753         return radeon_bo_get_surface_reg(bo);
 754 }
 755
 756 void radeon_bo_move_notify(struct ttm_buffer_object *bo,
 757                            struct ttm_mem_reg *new_mem)
 758 {
 759         struct radeon_bo *rbo;
 760
 761         if (!radeon_ttm_bo_is_radeon_bo(bo))
 762                 return;
 763
 764         rbo = container_of(bo, struct radeon_bo, tbo);
 765         radeon_bo_check_tiling(rbo, 0, 1);
 766         radeon_vm_bo_invalidate(rbo->rdev, rbo);
 767
 768         /* update statistics */
 769         if (!new_mem)
 770                 return;
 771
 772         radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
 773         radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
 774 }
 775
 776 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 777 {
 778         struct radeon_device *rdev;
 779         struct radeon_bo *rbo;
 780         unsigned long offset, size, lpfn;
 781         int i, r;
 782
 783         if (!radeon_ttm_bo_is_radeon_bo(bo))
 784                 return 0;
 785         rbo = container_of(bo, struct radeon_bo, tbo);
 786         radeon_bo_check_tiling(rbo, 0, 0);
 787         rdev = rbo->rdev;
 788         if (bo->mem.mem_type != TTM_PL_VRAM)
 789                 return 0;
 790
 791         size = bo->mem.num_pages << PAGE_SHIFT;
 792         offset = bo->mem.start << PAGE_SHIFT;
 793         if ((offset + size) <= rdev->mc.visible_vram_size)
 794                 return 0;
 795
 796         /* hurrah the memory is not visible ! */
 797         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM);
 798         lpfn =  rdev->mc.visible_vram_size >> PAGE_SHIFT;
 799         for (i = 0; i < rbo->placement.num_placement; i++) {
 800                 /* Force into visible VRAM */
 801                 if ((rbo->placements[i].flags & TTM_PL_FLAG_VRAM) &&
 802                     (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn))
 803                         rbo->placements[i].lpfn = lpfn;
 804         }
 805         r = ttm_bo_validate(bo, &rbo->placement, false, false);
 806         if (unlikely(r == -ENOMEM)) {
 807                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 808                 return ttm_bo_validate(bo, &rbo->placement, false, false);
 809         } else if (unlikely(r != 0)) {
 810                 return r;
 811         }
 812
 813         offset = bo->mem.start << PAGE_SHIFT;
 814         /* this should never happen */
 815         if ((offset + size) > rdev->mc.visible_vram_size)
 816                 return -EINVAL;
 817
 818         return 0;
 819 }
 820
 821 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait)
 822 {
 823         int r;
 824
 825         r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
 826         if (unlikely(r != 0))
 827                 return r;
 828         if (mem_type)
 829                 *mem_type = bo->tbo.mem.mem_type;
 830
 831         r = ttm_bo_wait(&bo->tbo, true, true, no_wait);
 832         ttm_bo_unreserve(&bo->tbo);
 833         return r;
 834 }
 835
 836 /**
 837  * radeon_bo_fence - add fence to buffer object
 838  *
 839  * @bo: buffer object in question
 840  * @fence: fence to add
 841  * @shared: true if fence should be added shared
 842  *
 843  */
 844 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence,
 845                      bool shared)
 846 {
 847         struct reservation_object *resv = bo->tbo.resv;
 848
 849         if (shared)
 850                 reservation_object_add_shared_fence(resv, &fence->base);
 851         else
 852                 reservation_object_add_excl_fence(resv, &fence->base);
 853 }