LXR linux/drivers/gpu/drm/radeon/radeon

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