drivers/gpu/drm/nouveau/nouveau_bo.c

   1 /*
   2  * Copyright 2007 Dave Airlied
   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 "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24 /*
  25  * Authors: Dave Airlied <airlied@linux.ie>
  26  *          Ben Skeggs   <darktama@iinet.net.au>
  27  *          Jeremy Kolb  <jkolb@brandeis.edu>
  28  */
  29
  30 #include <linux/dma-mapping.h>
  31
  32 #include "nouveau_drv.h"
  33 #include "nouveau_chan.h"
  34 #include "nouveau_fence.h"
  35
  36 #include "nouveau_bo.h"
  37 #include "nouveau_ttm.h"
  38 #include "nouveau_gem.h"
  39 #include "nouveau_mem.h"
  40 #include "nouveau_vmm.h"
  41
  42 #include <nvif/class.h>
  43 #include <nvif/if500b.h>
  44 #include <nvif/if900b.h>
  45
  46 static int nouveau_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm,
  47                                struct ttm_resource *reg);
  48 static void nouveau_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm);
  49
  50 /*
  51  * NV10-NV40 tiling helpers
  52  */
  53
  54 static void
  55 nv10_bo_update_tile_region(struct drm_device *dev, struct nouveau_drm_tile *reg,
  56                            u32 addr, u32 size, u32 pitch, u32 flags)
  57 {
  58         struct nouveau_drm *drm = nouveau_drm(dev);
  59         int i = reg - drm->tile.reg;
  60         struct nvkm_fb *fb = nvxx_fb(&drm->client.device);
  61         struct nvkm_fb_tile *tile = &fb->tile.region[i];
  62
  63         nouveau_fence_unref(&reg->fence);
  64
  65         if (tile->pitch)
  66                 nvkm_fb_tile_fini(fb, i, tile);
  67
  68         if (pitch)
  69                 nvkm_fb_tile_init(fb, i, addr, size, pitch, flags, tile);
  70
  71         nvkm_fb_tile_prog(fb, i, tile);
  72 }
  73
  74 static struct nouveau_drm_tile *
  75 nv10_bo_get_tile_region(struct drm_device *dev, int i)
  76 {
  77         struct nouveau_drm *drm = nouveau_drm(dev);
  78         struct nouveau_drm_tile *tile = &drm->tile.reg[i];
  79
  80         spin_lock(&drm->tile.lock);
  81
  82         if (!tile->used &&
  83             (!tile->fence || nouveau_fence_done(tile->fence)))
  84                 tile->used = true;
  85         else
  86                 tile = NULL;
  87
  88         spin_unlock(&drm->tile.lock);
  89         return tile;
  90 }
  91
  92 static void
  93 nv10_bo_put_tile_region(struct drm_device *dev, struct nouveau_drm_tile *tile,
  94                         struct dma_fence *fence)
  95 {
  96         struct nouveau_drm *drm = nouveau_drm(dev);
  97
  98         if (tile) {
  99                 spin_lock(&drm->tile.lock);
 100                 tile->fence = (struct nouveau_fence *)dma_fence_get(fence);
 101                 tile->used = false;
 102                 spin_unlock(&drm->tile.lock);
 103         }
 104 }
 105
 106 static struct nouveau_drm_tile *
 107 nv10_bo_set_tiling(struct drm_device *dev, u32 addr,
 108                    u32 size, u32 pitch, u32 zeta)
 109 {
 110         struct nouveau_drm *drm = nouveau_drm(dev);
 111         struct nvkm_fb *fb = nvxx_fb(&drm->client.device);
 112         struct nouveau_drm_tile *tile, *found = NULL;
 113         int i;
 114
 115         for (i = 0; i < fb->tile.regions; i++) {
 116                 tile = nv10_bo_get_tile_region(dev, i);
 117
 118                 if (pitch && !found) {
 119                         found = tile;
 120                         continue;
 121
 122                 } else if (tile && fb->tile.region[i].pitch) {
 123                         /* Kill an unused tile region. */
 124                         nv10_bo_update_tile_region(dev, tile, 0, 0, 0, 0);
 125                 }
 126
 127                 nv10_bo_put_tile_region(dev, tile, NULL);
 128         }
 129
 130         if (found)
 131                 nv10_bo_update_tile_region(dev, found, addr, size, pitch, zeta);
 132         return found;
 133 }
 134
 135 static void
 136 nouveau_bo_del_ttm(struct ttm_buffer_object *bo)
 137 {
 138         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 139         struct drm_device *dev = drm->dev;
 140         struct nouveau_bo *nvbo = nouveau_bo(bo);
 141
 142         WARN_ON(nvbo->bo.pin_count > 0);
 143         nouveau_bo_del_io_reserve_lru(bo);
 144         nv10_bo_put_tile_region(dev, nvbo->tile, NULL);
 145
 146         /*
 147          * If nouveau_bo_new() allocated this buffer, the GEM object was never
 148          * initialized, so don't attempt to release it.
 149          */
 150         if (bo->base.dev)
 151                 drm_gem_object_release(&bo->base);
 152
 153         kfree(nvbo);
 154 }
 155
 156 static inline u64
 157 roundup_64(u64 x, u32 y)
 158 {
 159         x += y - 1;
 160         do_div(x, y);
 161         return x * y;
 162 }
 163
 164 static void
 165 nouveau_bo_fixup_align(struct nouveau_bo *nvbo, int *align, u64 *size)
 166 {
 167         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 168         struct nvif_device *device = &drm->client.device;
 169
 170         if (device->info.family < NV_DEVICE_INFO_V0_TESLA) {
 171                 if (nvbo->mode) {
 172                         if (device->info.chipset >= 0x40) {
 173                                 *align = 65536;
 174                                 *size = roundup_64(*size, 64 * nvbo->mode);
 175
 176                         } else if (device->info.chipset >= 0x30) {
 177                                 *align = 32768;
 178                                 *size = roundup_64(*size, 64 * nvbo->mode);
 179
 180                         } else if (device->info.chipset >= 0x20) {
 181                                 *align = 16384;
 182                                 *size = roundup_64(*size, 64 * nvbo->mode);
 183
 184                         } else if (device->info.chipset >= 0x10) {
 185                                 *align = 16384;
 186                                 *size = roundup_64(*size, 32 * nvbo->mode);
 187                         }
 188                 }
 189         } else {
 190                 *size = roundup_64(*size, (1 << nvbo->page));
 191                 *align = max((1 <<  nvbo->page), *align);
 192         }
 193
 194         *size = roundup_64(*size, PAGE_SIZE);
 195 }
 196
 197 struct nouveau_bo *
 198 nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain,
 199                  u32 tile_mode, u32 tile_flags)
 200 {
 201         struct nouveau_drm *drm = cli->drm;
 202         struct nouveau_bo *nvbo;
 203         struct nvif_mmu *mmu = &cli->mmu;
 204         struct nvif_vmm *vmm = cli->svm.cli ? &cli->svm.vmm : &cli->vmm.vmm;
 205         int i, pi = -1;
 206
 207         if (!*size) {
 208                 NV_WARN(drm, "skipped size %016llx\n", *size);
 209                 return ERR_PTR(-EINVAL);
 210         }
 211
 212         nvbo = kzalloc(sizeof(struct nouveau_bo), GFP_KERNEL);
 213         if (!nvbo)
 214                 return ERR_PTR(-ENOMEM);
 215         INIT_LIST_HEAD(&nvbo->head);
 216         INIT_LIST_HEAD(&nvbo->entry);
 217         INIT_LIST_HEAD(&nvbo->vma_list);
 218         nvbo->bo.bdev = &drm->ttm.bdev;
 219
 220         /* This is confusing, and doesn't actually mean we want an uncached
 221          * mapping, but is what NOUVEAU_GEM_DOMAIN_COHERENT gets translated
 222          * into in nouveau_gem_new().
 223          */
 224         if (domain & NOUVEAU_GEM_DOMAIN_COHERENT) {
 225                 /* Determine if we can get a cache-coherent map, forcing
 226                  * uncached mapping if we can't.
 227                  */
 228                 if (!nouveau_drm_use_coherent_gpu_mapping(drm))
 229                         nvbo->force_coherent = true;
 230         }
 231
 232         if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI) {
 233                 nvbo->kind = (tile_flags & 0x0000ff00) >> 8;
 234                 if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
 235                         kfree(nvbo);
 236                         return ERR_PTR(-EINVAL);
 237                 }
 238
 239                 nvbo->comp = mmu->kind[nvbo->kind] != nvbo->kind;
 240         } else
 241         if (cli->device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 242                 nvbo->kind = (tile_flags & 0x00007f00) >> 8;
 243                 nvbo->comp = (tile_flags & 0x00030000) >> 16;
 244                 if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
 245                         kfree(nvbo);
 246                         return ERR_PTR(-EINVAL);
 247                 }
 248         } else {
 249                 nvbo->zeta = (tile_flags & 0x00000007);
 250         }
 251         nvbo->mode = tile_mode;
 252         nvbo->contig = !(tile_flags & NOUVEAU_GEM_TILE_NONCONTIG);
 253
 254         /* Determine the desirable target GPU page size for the buffer. */
 255         for (i = 0; i < vmm->page_nr; i++) {
 256                 /* Because we cannot currently allow VMM maps to fail
 257                  * during buffer migration, we need to determine page
 258                  * size for the buffer up-front, and pre-allocate its
 259                  * page tables.
 260                  *
 261                  * Skip page sizes that can't support needed domains.
 262                  */
 263                 if (cli->device.info.family > NV_DEVICE_INFO_V0_CURIE &&
 264                     (domain & NOUVEAU_GEM_DOMAIN_VRAM) && !vmm->page[i].vram)
 265                         continue;
 266                 if ((domain & NOUVEAU_GEM_DOMAIN_GART) &&
 267                     (!vmm->page[i].host || vmm->page[i].shift > PAGE_SHIFT))
 268                         continue;
 269
 270                 /* Select this page size if it's the first that supports
 271                  * the potential memory domains, or when it's compatible
 272                  * with the requested compression settings.
 273                  */
 274                 if (pi < 0 || !nvbo->comp || vmm->page[i].comp)
 275                         pi = i;
 276
 277                 /* Stop once the buffer is larger than the current page size. */
 278                 if (*size >= 1ULL << vmm->page[i].shift)
 279                         break;
 280         }
 281
 282         if (WARN_ON(pi < 0))
 283                 return ERR_PTR(-EINVAL);
 284
 285         /* Disable compression if suitable settings couldn't be found. */
 286         if (nvbo->comp && !vmm->page[pi].comp) {
 287                 if (mmu->object.oclass >= NVIF_CLASS_MMU_GF100)
 288                         nvbo->kind = mmu->kind[nvbo->kind];
 289                 nvbo->comp = 0;
 290         }
 291         nvbo->page = vmm->page[pi].shift;
 292
 293         nouveau_bo_fixup_align(nvbo, align, size);
 294
 295         return nvbo;
 296 }
 297
 298 int
 299 nouveau_bo_init(struct nouveau_bo *nvbo, u64 size, int align, u32 domain,
 300                 struct sg_table *sg, struct dma_resv *robj)
 301 {
 302         int type = sg ? ttm_bo_type_sg : ttm_bo_type_device;
 303         int ret;
 304
 305         nvbo->bo.mem.num_pages = size >> PAGE_SHIFT;
 306         nouveau_bo_placement_set(nvbo, domain, 0);
 307         INIT_LIST_HEAD(&nvbo->io_reserve_lru);
 308
 309         ret = ttm_bo_init(nvbo->bo.bdev, &nvbo->bo, size, type,
 310                           &nvbo->placement, align >> PAGE_SHIFT, false, sg,
 311                           robj, nouveau_bo_del_ttm);
 312         if (ret) {
 313                 /* ttm will call nouveau_bo_del_ttm if it fails.. */
 314                 return ret;
 315         }
 316
 317         return 0;
 318 }
 319
 320 int
 321 nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 322                uint32_t domain, uint32_t tile_mode, uint32_t tile_flags,
 323                struct sg_table *sg, struct dma_resv *robj,
 324                struct nouveau_bo **pnvbo)
 325 {
 326         struct nouveau_bo *nvbo;
 327         int ret;
 328
 329         nvbo = nouveau_bo_alloc(cli, &size, &align, domain, tile_mode,
 330                                 tile_flags);
 331         if (IS_ERR(nvbo))
 332                 return PTR_ERR(nvbo);
 333
 334         ret = nouveau_bo_init(nvbo, size, align, domain, sg, robj);
 335         if (ret)
 336                 return ret;
 337
 338         *pnvbo = nvbo;
 339         return 0;
 340 }
 341
 342 static void
 343 set_placement_list(struct ttm_place *pl, unsigned *n, uint32_t domain)
 344 {
 345         *n = 0;
 346
 347         if (domain & NOUVEAU_GEM_DOMAIN_VRAM) {
 348                 pl[*n].mem_type = TTM_PL_VRAM;
 349                 pl[*n].flags = 0;
 350                 (*n)++;
 351         }
 352         if (domain & NOUVEAU_GEM_DOMAIN_GART) {
 353                 pl[*n].mem_type = TTM_PL_TT;
 354                 pl[*n].flags = 0;
 355                 (*n)++;
 356         }
 357         if (domain & NOUVEAU_GEM_DOMAIN_CPU) {
 358                 pl[*n].mem_type = TTM_PL_SYSTEM;
 359                 pl[(*n)++].flags = 0;
 360         }
 361 }
 362
 363 static void
 364 set_placement_range(struct nouveau_bo *nvbo, uint32_t domain)
 365 {
 366         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 367         u32 vram_pages = drm->client.device.info.ram_size >> PAGE_SHIFT;
 368         unsigned i, fpfn, lpfn;
 369
 370         if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CELSIUS &&
 371             nvbo->mode && (domain & NOUVEAU_GEM_DOMAIN_VRAM) &&
 372             nvbo->bo.mem.num_pages < vram_pages / 4) {
 373                 /*
 374                  * Make sure that the color and depth buffers are handled
 375                  * by independent memory controller units. Up to a 9x
 376                  * speed up when alpha-blending and depth-test are enabled
 377                  * at the same time.
 378                  */
 379                 if (nvbo->zeta) {
 380                         fpfn = vram_pages / 2;
 381                         lpfn = ~0;
 382                 } else {
 383                         fpfn = 0;
 384                         lpfn = vram_pages / 2;
 385                 }
 386                 for (i = 0; i < nvbo->placement.num_placement; ++i) {
 387                         nvbo->placements[i].fpfn = fpfn;
 388                         nvbo->placements[i].lpfn = lpfn;
 389                 }
 390                 for (i = 0; i < nvbo->placement.num_busy_placement; ++i) {
 391                         nvbo->busy_placements[i].fpfn = fpfn;
 392                         nvbo->busy_placements[i].lpfn = lpfn;
 393                 }
 394         }
 395 }
 396
 397 void
 398 nouveau_bo_placement_set(struct nouveau_bo *nvbo, uint32_t domain,
 399                          uint32_t busy)
 400 {
 401         struct ttm_placement *pl = &nvbo->placement;
 402
 403         pl->placement = nvbo->placements;
 404         set_placement_list(nvbo->placements, &pl->num_placement, domain);
 405
 406         pl->busy_placement = nvbo->busy_placements;
 407         set_placement_list(nvbo->busy_placements, &pl->num_busy_placement,
 408                            domain | busy);
 409
 410         set_placement_range(nvbo, domain);
 411 }
 412
 413 int
 414 nouveau_bo_pin(struct nouveau_bo *nvbo, uint32_t domain, bool contig)
 415 {
 416         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 417         struct ttm_buffer_object *bo = &nvbo->bo;
 418         bool force = false, evict = false;
 419         int ret;
 420
 421         ret = ttm_bo_reserve(bo, false, false, NULL);
 422         if (ret)
 423                 return ret;
 424
 425         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA &&
 426             domain == NOUVEAU_GEM_DOMAIN_VRAM && contig) {
 427                 if (!nvbo->contig) {
 428                         nvbo->contig = true;
 429                         force = true;
 430                         evict = true;
 431                 }
 432         }
 433
 434         if (nvbo->bo.pin_count) {
 435                 bool error = evict;
 436
 437                 switch (bo->mem.mem_type) {
 438                 case TTM_PL_VRAM:
 439                         error |= !(domain & NOUVEAU_GEM_DOMAIN_VRAM);
 440                         break;
 441                 case TTM_PL_TT:
 442                         error |= !(domain & NOUVEAU_GEM_DOMAIN_GART);
 443                 default:
 444                         break;
 445                 }
 446
 447                 if (error) {
 448                         NV_ERROR(drm, "bo %p pinned elsewhere: "
 449                                       "0x%08x vs 0x%08x\n", bo,
 450                                  bo->mem.mem_type, domain);
 451                         ret = -EBUSY;
 452                 }
 453                 ttm_bo_pin(&nvbo->bo);
 454                 goto out;
 455         }
 456
 457         if (evict) {
 458                 nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_GART, 0);
 459                 ret = nouveau_bo_validate(nvbo, false, false);
 460                 if (ret)
 461                         goto out;
 462         }
 463
 464         nouveau_bo_placement_set(nvbo, domain, 0);
 465         ret = nouveau_bo_validate(nvbo, false, false);
 466         if (ret)
 467                 goto out;
 468
 469         ttm_bo_pin(&nvbo->bo);
 470
 471         switch (bo->mem.mem_type) {
 472         case TTM_PL_VRAM:
 473                 drm->gem.vram_available -= bo->base.size;
 474                 break;
 475         case TTM_PL_TT:
 476                 drm->gem.gart_available -= bo->base.size;
 477                 break;
 478         default:
 479                 break;
 480         }
 481
 482 out:
 483         if (force && ret)
 484                 nvbo->contig = false;
 485         ttm_bo_unreserve(bo);
 486         return ret;
 487 }
 488
 489 int
 490 nouveau_bo_unpin(struct nouveau_bo *nvbo)
 491 {
 492         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 493         struct ttm_buffer_object *bo = &nvbo->bo;
 494         int ret;
 495
 496         ret = ttm_bo_reserve(bo, false, false, NULL);
 497         if (ret)
 498                 return ret;
 499
 500         ttm_bo_unpin(&nvbo->bo);
 501         if (!nvbo->bo.pin_count) {
 502                 switch (bo->mem.mem_type) {
 503                 case TTM_PL_VRAM:
 504                         drm->gem.vram_available += bo->base.size;
 505                         break;
 506                 case TTM_PL_TT:
 507                         drm->gem.gart_available += bo->base.size;
 508                         break;
 509                 default:
 510                         break;
 511                 }
 512         }
 513
 514         ttm_bo_unreserve(bo);
 515         return 0;
 516 }
 517
 518 int
 519 nouveau_bo_map(struct nouveau_bo *nvbo)
 520 {
 521         int ret;
 522
 523         ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
 524         if (ret)
 525                 return ret;
 526
 527         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages, &nvbo->kmap);
 528
 529         ttm_bo_unreserve(&nvbo->bo);
 530         return ret;
 531 }
 532
 533 void
 534 nouveau_bo_unmap(struct nouveau_bo *nvbo)
 535 {
 536         if (!nvbo)
 537                 return;
 538
 539         ttm_bo_kunmap(&nvbo->kmap);
 540 }
 541
 542 void
 543 nouveau_bo_sync_for_device(struct nouveau_bo *nvbo)
 544 {
 545         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 546         struct ttm_tt *ttm_dma = (struct ttm_tt *)nvbo->bo.ttm;
 547         int i, j;
 548
 549         if (!ttm_dma)
 550                 return;
 551         if (!ttm_dma->pages) {
 552                 NV_DEBUG(drm, "ttm_dma 0x%p: pages NULL\n", ttm_dma);
 553                 return;
 554         }
 555
 556         /* Don't waste time looping if the object is coherent */
 557         if (nvbo->force_coherent)
 558                 return;
 559
 560         i = 0;
 561         while (i < ttm_dma->num_pages) {
 562                 struct page *p = ttm_dma->pages[i];
 563                 size_t num_pages = 1;
 564
 565                 for (j = i + 1; j < ttm_dma->num_pages; ++j) {
 566                         if (++p != ttm_dma->pages[j])
 567                                 break;
 568
 569                         ++num_pages;
 570                 }
 571                 dma_sync_single_for_device(drm->dev->dev,
 572                                            ttm_dma->dma_address[i],
 573                                            num_pages * PAGE_SIZE, DMA_TO_DEVICE);
 574                 i += num_pages;
 575         }
 576 }
 577
 578 void
 579 nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo)
 580 {
 581         struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
 582         struct ttm_tt *ttm_dma = (struct ttm_tt *)nvbo->bo.ttm;
 583         int i, j;
 584
 585         if (!ttm_dma)
 586                 return;
 587         if (!ttm_dma->pages) {
 588                 NV_DEBUG(drm, "ttm_dma 0x%p: pages NULL\n", ttm_dma);
 589                 return;
 590         }
 591
 592         /* Don't waste time looping if the object is coherent */
 593         if (nvbo->force_coherent)
 594                 return;
 595
 596         i = 0;
 597         while (i < ttm_dma->num_pages) {
 598                 struct page *p = ttm_dma->pages[i];
 599                 size_t num_pages = 1;
 600
 601                 for (j = i + 1; j < ttm_dma->num_pages; ++j) {
 602                         if (++p != ttm_dma->pages[j])
 603                                 break;
 604
 605                         ++num_pages;
 606                 }
 607
 608                 dma_sync_single_for_cpu(drm->dev->dev, ttm_dma->dma_address[i],
 609                                         num_pages * PAGE_SIZE, DMA_FROM_DEVICE);
 610                 i += num_pages;
 611         }
 612 }
 613
 614 void nouveau_bo_add_io_reserve_lru(struct ttm_buffer_object *bo)
 615 {
 616         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 617         struct nouveau_bo *nvbo = nouveau_bo(bo);
 618
 619         mutex_lock(&drm->ttm.io_reserve_mutex);
 620         list_move_tail(&nvbo->io_reserve_lru, &drm->ttm.io_reserve_lru);
 621         mutex_unlock(&drm->ttm.io_reserve_mutex);
 622 }
 623
 624 void nouveau_bo_del_io_reserve_lru(struct ttm_buffer_object *bo)
 625 {
 626         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 627         struct nouveau_bo *nvbo = nouveau_bo(bo);
 628
 629         mutex_lock(&drm->ttm.io_reserve_mutex);
 630         list_del_init(&nvbo->io_reserve_lru);
 631         mutex_unlock(&drm->ttm.io_reserve_mutex);
 632 }
 633
 634 int
 635 nouveau_bo_validate(struct nouveau_bo *nvbo, bool interruptible,
 636                     bool no_wait_gpu)
 637 {
 638         struct ttm_operation_ctx ctx = { interruptible, no_wait_gpu };
 639         int ret;
 640
 641         ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement, &ctx);
 642         if (ret)
 643                 return ret;
 644
 645         nouveau_bo_sync_for_device(nvbo);
 646
 647         return 0;
 648 }
 649
 650 void
 651 nouveau_bo_wr16(struct nouveau_bo *nvbo, unsigned index, u16 val)
 652 {
 653         bool is_iomem;
 654         u16 *mem = ttm_kmap_obj_virtual(&nvbo->kmap, &is_iomem);
 655
 656         mem += index;
 657
 658         if (is_iomem)
 659                 iowrite16_native(val, (void __force __iomem *)mem);
 660         else
 661                 *mem = val;
 662 }
 663
 664 u32
 665 nouveau_bo_rd32(struct nouveau_bo *nvbo, unsigned index)
 666 {
 667         bool is_iomem;
 668         u32 *mem = ttm_kmap_obj_virtual(&nvbo->kmap, &is_iomem);
 669
 670         mem += index;
 671
 672         if (is_iomem)
 673                 return ioread32_native((void __force __iomem *)mem);
 674         else
 675                 return *mem;
 676 }
 677
 678 void
 679 nouveau_bo_wr32(struct nouveau_bo *nvbo, unsigned index, u32 val)
 680 {
 681         bool is_iomem;
 682         u32 *mem = ttm_kmap_obj_virtual(&nvbo->kmap, &is_iomem);
 683
 684         mem += index;
 685
 686         if (is_iomem)
 687                 iowrite32_native(val, (void __force __iomem *)mem);
 688         else
 689                 *mem = val;
 690 }
 691
 692 static struct ttm_tt *
 693 nouveau_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags)
 694 {
 695 #if IS_ENABLED(CONFIG_AGP)
 696         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 697
 698         if (drm->agp.bridge) {
 699                 return ttm_agp_tt_create(bo, drm->agp.bridge, page_flags);
 700         }
 701 #endif
 702
 703         return nouveau_sgdma_create_ttm(bo, page_flags);
 704 }
 705
 706 static int
 707 nouveau_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm,
 708                     struct ttm_resource *reg)
 709 {
 710 #if IS_ENABLED(CONFIG_AGP)
 711         struct nouveau_drm *drm = nouveau_bdev(bdev);
 712 #endif
 713         if (!reg)
 714                 return -EINVAL;
 715 #if IS_ENABLED(CONFIG_AGP)
 716         if (drm->agp.bridge)
 717                 return ttm_agp_bind(ttm, reg);
 718 #endif
 719         return nouveau_sgdma_bind(bdev, ttm, reg);
 720 }
 721
 722 static void
 723 nouveau_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
 724 {
 725 #if IS_ENABLED(CONFIG_AGP)
 726         struct nouveau_drm *drm = nouveau_bdev(bdev);
 727
 728         if (drm->agp.bridge) {
 729                 ttm_agp_unbind(ttm);
 730                 return;
 731         }
 732 #endif
 733         nouveau_sgdma_unbind(bdev, ttm);
 734 }
 735
 736 static void
 737 nouveau_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 738 {
 739         struct nouveau_bo *nvbo = nouveau_bo(bo);
 740
 741         switch (bo->mem.mem_type) {
 742         case TTM_PL_VRAM:
 743                 nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_GART,
 744                                          NOUVEAU_GEM_DOMAIN_CPU);
 745                 break;
 746         default:
 747                 nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_CPU, 0);
 748                 break;
 749         }
 750
 751         *pl = nvbo->placement;
 752 }
 753
 754 static int
 755 nouveau_bo_move_prep(struct nouveau_drm *drm, struct ttm_buffer_object *bo,
 756                      struct ttm_resource *reg)
 757 {
 758         struct nouveau_mem *old_mem = nouveau_mem(&bo->mem);
 759         struct nouveau_mem *new_mem = nouveau_mem(reg);
 760         struct nvif_vmm *vmm = &drm->client.vmm.vmm;
 761         int ret;
 762
 763         ret = nvif_vmm_get(vmm, LAZY, false, old_mem->mem.page, 0,
 764                            old_mem->mem.size, &old_mem->vma[0]);
 765         if (ret)
 766                 return ret;
 767
 768         ret = nvif_vmm_get(vmm, LAZY, false, new_mem->mem.page, 0,
 769                            new_mem->mem.size, &old_mem->vma[1]);
 770         if (ret)
 771                 goto done;
 772
 773         ret = nouveau_mem_map(old_mem, vmm, &old_mem->vma[0]);
 774         if (ret)
 775                 goto done;
 776
 777         ret = nouveau_mem_map(new_mem, vmm, &old_mem->vma[1]);
 778 done:
 779         if (ret) {
 780                 nvif_vmm_put(vmm, &old_mem->vma[1]);
 781                 nvif_vmm_put(vmm, &old_mem->vma[0]);
 782         }
 783         return 0;
 784 }
 785
 786 static int
 787 nouveau_bo_move_m2mf(struct ttm_buffer_object *bo, int evict,
 788                      struct ttm_operation_ctx *ctx,
 789                      struct ttm_resource *new_reg)
 790 {
 791         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 792         struct nouveau_channel *chan = drm->ttm.chan;
 793         struct nouveau_cli *cli = (void *)chan->user.client;
 794         struct nouveau_fence *fence;
 795         int ret;
 796
 797         /* create temporary vmas for the transfer and attach them to the
 798          * old nvkm_mem node, these will get cleaned up after ttm has
 799          * destroyed the ttm_resource
 800          */
 801         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 802                 ret = nouveau_bo_move_prep(drm, bo, new_reg);
 803                 if (ret)
 804                         return ret;
 805         }
 806
 807         if (drm_drv_uses_atomic_modeset(drm->dev))
 808                 mutex_lock(&cli->mutex);
 809         else
 810                 mutex_lock_nested(&cli->mutex, SINGLE_DEPTH_NESTING);
 811         ret = nouveau_fence_sync(nouveau_bo(bo), chan, true, ctx->interruptible);
 812         if (ret == 0) {
 813                 ret = drm->ttm.move(chan, bo, &bo->mem, new_reg);
 814                 if (ret == 0) {
 815                         ret = nouveau_fence_new(chan, false, &fence);
 816                         if (ret == 0) {
 817                                 ret = ttm_bo_move_accel_cleanup(bo,
 818                                                                 &fence->base,
 819                                                                 evict, false,
 820                                                                 new_reg);
 821                                 nouveau_fence_unref(&fence);
 822                         }
 823                 }
 824         }
 825         mutex_unlock(&cli->mutex);
 826         return ret;
 827 }
 828
 829 void
 830 nouveau_bo_move_init(struct nouveau_drm *drm)
 831 {
 832         static const struct _method_table {
 833                 const char *name;
 834                 int engine;
 835                 s32 oclass;
 836                 int (*exec)(struct nouveau_channel *,
 837                             struct ttm_buffer_object *,
 838                             struct ttm_resource *, struct ttm_resource *);
 839                 int (*init)(struct nouveau_channel *, u32 handle);
 840         } _methods[] = {
 841                 {  "COPY", 4, 0xc5b5, nve0_bo_move_copy, nve0_bo_move_init },
 842                 {  "GRCE", 0, 0xc5b5, nve0_bo_move_copy, nvc0_bo_move_init },
 843                 {  "COPY", 4, 0xc3b5, nve0_bo_move_copy, nve0_bo_move_init },
 844                 {  "GRCE", 0, 0xc3b5, nve0_bo_move_copy, nvc0_bo_move_init },
 845                 {  "COPY", 4, 0xc1b5, nve0_bo_move_copy, nve0_bo_move_init },
 846                 {  "GRCE", 0, 0xc1b5, nve0_bo_move_copy, nvc0_bo_move_init },
 847                 {  "COPY", 4, 0xc0b5, nve0_bo_move_copy, nve0_bo_move_init },
 848                 {  "GRCE", 0, 0xc0b5, nve0_bo_move_copy, nvc0_bo_move_init },
 849                 {  "COPY", 4, 0xb0b5, nve0_bo_move_copy, nve0_bo_move_init },
 850                 {  "GRCE", 0, 0xb0b5, nve0_bo_move_copy, nvc0_bo_move_init },
 851                 {  "COPY", 4, 0xa0b5, nve0_bo_move_copy, nve0_bo_move_init },
 852                 {  "GRCE", 0, 0xa0b5, nve0_bo_move_copy, nvc0_bo_move_init },
 853                 { "COPY1", 5, 0x90b8, nvc0_bo_move_copy, nvc0_bo_move_init },
 854                 { "COPY0", 4, 0x90b5, nvc0_bo_move_copy, nvc0_bo_move_init },
 855                 {  "COPY", 0, 0x85b5, nva3_bo_move_copy, nv50_bo_move_init },
 856                 { "CRYPT", 0, 0x74c1, nv84_bo_move_exec, nv50_bo_move_init },
 857                 {  "M2MF", 0, 0x9039, nvc0_bo_move_m2mf, nvc0_bo_move_init },
 858                 {  "M2MF", 0, 0x5039, nv50_bo_move_m2mf, nv50_bo_move_init },
 859                 {  "M2MF", 0, 0x0039, nv04_bo_move_m2mf, nv04_bo_move_init },
 860                 {},
 861         };
 862         const struct _method_table *mthd = _methods;
 863         const char *name = "CPU";
 864         int ret;
 865
 866         do {
 867                 struct nouveau_channel *chan;
 868
 869                 if (mthd->engine)
 870                         chan = drm->cechan;
 871                 else
 872                         chan = drm->channel;
 873                 if (chan == NULL)
 874                         continue;
 875
 876                 ret = nvif_object_ctor(&chan->user, "ttmBoMove",
 877                                        mthd->oclass | (mthd->engine << 16),
 878                                        mthd->oclass, NULL, 0,
 879                                        &drm->ttm.copy);
 880                 if (ret == 0) {
 881                         ret = mthd->init(chan, drm->ttm.copy.handle);
 882                         if (ret) {
 883                                 nvif_object_dtor(&drm->ttm.copy);
 884                                 continue;
 885                         }
 886
 887                         drm->ttm.move = mthd->exec;
 888                         drm->ttm.chan = chan;
 889                         name = mthd->name;
 890                         break;
 891                 }
 892         } while ((++mthd)->exec);
 893
 894         NV_INFO(drm, "MM: using %s for buffer copies\n", name);
 895 }
 896
 897 static void nouveau_bo_move_ntfy(struct ttm_buffer_object *bo,
 898                                  struct ttm_resource *new_reg)
 899 {
 900         struct nouveau_mem *mem = new_reg ? nouveau_mem(new_reg) : NULL;
 901         struct nouveau_bo *nvbo = nouveau_bo(bo);
 902         struct nouveau_vma *vma;
 903
 904         /* ttm can now (stupidly) pass the driver bos it didn't create... */
 905         if (bo->destroy != nouveau_bo_del_ttm)
 906                 return;
 907
 908         nouveau_bo_del_io_reserve_lru(bo);
 909
 910         if (mem && new_reg->mem_type != TTM_PL_SYSTEM &&
 911             mem->mem.page == nvbo->page) {
 912                 list_for_each_entry(vma, &nvbo->vma_list, head) {
 913                         nouveau_vma_map(vma, mem);
 914                 }
 915         } else {
 916                 list_for_each_entry(vma, &nvbo->vma_list, head) {
 917                         WARN_ON(ttm_bo_wait(bo, false, false));
 918                         nouveau_vma_unmap(vma);
 919                 }
 920         }
 921
 922         if (new_reg) {
 923                 if (new_reg->mm_node)
 924                         nvbo->offset = (new_reg->start << PAGE_SHIFT);
 925                 else
 926                         nvbo->offset = 0;
 927         }
 928
 929 }
 930
 931 static int
 932 nouveau_bo_vm_bind(struct ttm_buffer_object *bo, struct ttm_resource *new_reg,
 933                    struct nouveau_drm_tile **new_tile)
 934 {
 935         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 936         struct drm_device *dev = drm->dev;
 937         struct nouveau_bo *nvbo = nouveau_bo(bo);
 938         u64 offset = new_reg->start << PAGE_SHIFT;
 939
 940         *new_tile = NULL;
 941         if (new_reg->mem_type != TTM_PL_VRAM)
 942                 return 0;
 943
 944         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_CELSIUS) {
 945                 *new_tile = nv10_bo_set_tiling(dev, offset, bo->base.size,
 946                                                nvbo->mode, nvbo->zeta);
 947         }
 948
 949         return 0;
 950 }
 951
 952 static void
 953 nouveau_bo_vm_cleanup(struct ttm_buffer_object *bo,
 954                       struct nouveau_drm_tile *new_tile,
 955                       struct nouveau_drm_tile **old_tile)
 956 {
 957         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 958         struct drm_device *dev = drm->dev;
 959         struct dma_fence *fence = dma_resv_get_excl(bo->base.resv);
 960
 961         nv10_bo_put_tile_region(dev, *old_tile, fence);
 962         *old_tile = new_tile;
 963 }
 964
 965 static int
 966 nouveau_bo_move(struct ttm_buffer_object *bo, bool evict,
 967                 struct ttm_operation_ctx *ctx,
 968                 struct ttm_resource *new_reg,
 969                 struct ttm_place *hop)
 970 {
 971         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 972         struct nouveau_bo *nvbo = nouveau_bo(bo);
 973         struct ttm_resource *old_reg = &bo->mem;
 974         struct nouveau_drm_tile *new_tile = NULL;
 975         int ret = 0;
 976
 977
 978         if (new_reg->mem_type == TTM_PL_TT) {
 979                 ret = nouveau_ttm_tt_bind(bo->bdev, bo->ttm, new_reg);
 980                 if (ret)
 981                         return ret;
 982         }
 983
 984         nouveau_bo_move_ntfy(bo, new_reg);
 985         ret = ttm_bo_wait_ctx(bo, ctx);
 986         if (ret)
 987                 goto out_ntfy;
 988
 989         if (nvbo->bo.pin_count)
 990                 NV_WARN(drm, "Moving pinned object %p!\n", nvbo);
 991
 992         if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
 993                 ret = nouveau_bo_vm_bind(bo, new_reg, &new_tile);
 994                 if (ret)
 995                         goto out_ntfy;
 996         }
 997
 998         /* Fake bo copy. */
 999         if (old_reg->mem_type == TTM_PL_SYSTEM && !bo->ttm) {
1000                 ttm_bo_move_null(bo, new_reg);
1001                 goto out;
1002         }
1003
1004         if (old_reg->mem_type == TTM_PL_SYSTEM &&
1005             new_reg->mem_type == TTM_PL_TT) {
1006                 ttm_bo_move_null(bo, new_reg);
1007                 goto out;
1008         }
1009
1010         if (old_reg->mem_type == TTM_PL_TT &&
1011             new_reg->mem_type == TTM_PL_SYSTEM) {
1012                 nouveau_ttm_tt_unbind(bo->bdev, bo->ttm);
1013                 ttm_resource_free(bo, &bo->mem);
1014                 ttm_bo_assign_mem(bo, new_reg);
1015                 goto out;
1016         }
1017
1018         /* Hardware assisted copy. */
1019         if (drm->ttm.move) {
1020                 if ((old_reg->mem_type == TTM_PL_SYSTEM &&
1021                      new_reg->mem_type == TTM_PL_VRAM) ||
1022                     (old_reg->mem_type == TTM_PL_VRAM &&
1023                      new_reg->mem_type == TTM_PL_SYSTEM)) {
1024                         hop->fpfn = 0;
1025                         hop->lpfn = 0;
1026                         hop->mem_type = TTM_PL_TT;
1027                         hop->flags = 0;
1028                         return -EMULTIHOP;
1029                 }
1030                 ret = nouveau_bo_move_m2mf(bo, evict, ctx,
1031                                            new_reg);
1032         } else
1033                 ret = -ENODEV;
1034
1035         if (ret) {
1036                 /* Fallback to software copy. */
1037                 ret = ttm_bo_move_memcpy(bo, ctx, new_reg);
1038         }
1039
1040 out:
1041         if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
1042                 if (ret)
1043                         nouveau_bo_vm_cleanup(bo, NULL, &new_tile);
1044                 else
1045                         nouveau_bo_vm_cleanup(bo, new_tile, &nvbo->tile);
1046         }
1047 out_ntfy:
1048         if (ret) {
1049                 nouveau_bo_move_ntfy(bo, &bo->mem);
1050         }
1051         return ret;
1052 }
1053
1054 static int
1055 nouveau_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
1056 {
1057         struct nouveau_bo *nvbo = nouveau_bo(bo);
1058
1059         return drm_vma_node_verify_access(&nvbo->bo.base.vma_node,
1060                                           filp->private_data);
1061 }
1062
1063 static void
1064 nouveau_ttm_io_mem_free_locked(struct nouveau_drm *drm,
1065                                struct ttm_resource *reg)
1066 {
1067         struct nouveau_mem *mem = nouveau_mem(reg);
1068
1069         if (drm->client.mem->oclass >= NVIF_CLASS_MEM_NV50) {
1070                 switch (reg->mem_type) {
1071                 case TTM_PL_TT:
1072                         if (mem->kind)
1073                                 nvif_object_unmap_handle(&mem->mem.object);
1074                         break;
1075                 case TTM_PL_VRAM:
1076                         nvif_object_unmap_handle(&mem->mem.object);
1077                         break;
1078                 default:
1079                         break;
1080                 }
1081         }
1082 }
1083
1084 static int
1085 nouveau_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *reg)
1086 {
1087         struct nouveau_drm *drm = nouveau_bdev(bdev);
1088         struct nvkm_device *device = nvxx_device(&drm->client.device);
1089         struct nouveau_mem *mem = nouveau_mem(reg);
1090         struct nvif_mmu *mmu = &drm->client.mmu;
1091         int ret;
1092
1093         mutex_lock(&drm->ttm.io_reserve_mutex);
1094 retry:
1095         switch (reg->mem_type) {
1096         case TTM_PL_SYSTEM:
1097                 /* System memory */
1098                 ret = 0;
1099                 goto out;
1100         case TTM_PL_TT:
1101 #if IS_ENABLED(CONFIG_AGP)
1102                 if (drm->agp.bridge) {
1103                         reg->bus.offset = (reg->start << PAGE_SHIFT) +
1104                                 drm->agp.base;
1105                         reg->bus.is_iomem = !drm->agp.cma;
1106                         reg->bus.caching = ttm_write_combined;
1107                 }
1108 #endif
1109                 if (drm->client.mem->oclass < NVIF_CLASS_MEM_NV50 ||
1110                     !mem->kind) {
1111                         /* untiled */
1112                         ret = 0;
1113                         break;
1114                 }
1115                 fallthrough;    /* tiled memory */
1116         case TTM_PL_VRAM:
1117                 reg->bus.offset = (reg->start << PAGE_SHIFT) +
1118                         device->func->resource_addr(device, 1);
1119                 reg->bus.is_iomem = true;
1120
1121                 /* Some BARs do not support being ioremapped WC */
1122                 if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA &&
1123                     mmu->type[drm->ttm.type_vram].type & NVIF_MEM_UNCACHED)
1124                         reg->bus.caching = ttm_uncached;
1125                 else
1126                         reg->bus.caching = ttm_write_combined;
1127
1128                 if (drm->client.mem->oclass >= NVIF_CLASS_MEM_NV50) {
1129                         union {
1130                                 struct nv50_mem_map_v0 nv50;
1131                                 struct gf100_mem_map_v0 gf100;
1132                         } args;
1133                         u64 handle, length;
1134                         u32 argc = 0;
1135
1136                         switch (mem->mem.object.oclass) {
1137                         case NVIF_CLASS_MEM_NV50:
1138                                 args.nv50.version = 0;
1139                                 args.nv50.ro = 0;
1140                                 args.nv50.kind = mem->kind;
1141                                 args.nv50.comp = mem->comp;
1142                                 argc = sizeof(args.nv50);
1143                                 break;
1144                         case NVIF_CLASS_MEM_GF100:
1145                                 args.gf100.version = 0;
1146                                 args.gf100.ro = 0;
1147                                 args.gf100.kind = mem->kind;
1148                                 argc = sizeof(args.gf100);
1149                                 break;
1150                         default:
1151                                 WARN_ON(1);
1152                                 break;
1153                         }
1154
1155                         ret = nvif_object_map_handle(&mem->mem.object,
1156                                                      &args, argc,
1157                                                      &handle, &length);
1158                         if (ret != 1) {
1159                                 if (WARN_ON(ret == 0))
1160                                         ret = -EINVAL;
1161                                 goto out;
1162                         }
1163
1164                         reg->bus.offset = handle;
1165                 }
1166                 ret = 0;
1167                 break;
1168         default:
1169                 ret = -EINVAL;
1170         }
1171
1172 out:
1173         if (ret == -ENOSPC) {
1174                 struct nouveau_bo *nvbo;
1175
1176                 nvbo = list_first_entry_or_null(&drm->ttm.io_reserve_lru,
1177                                                 typeof(*nvbo),
1178                                                 io_reserve_lru);
1179                 if (nvbo) {
1180                         list_del_init(&nvbo->io_reserve_lru);
1181                         drm_vma_node_unmap(&nvbo->bo.base.vma_node,
1182                                            bdev->dev_mapping);
1183                         nouveau_ttm_io_mem_free_locked(drm, &nvbo->bo.mem);
1184                         goto retry;
1185                 }
1186
1187         }
1188         mutex_unlock(&drm->ttm.io_reserve_mutex);
1189         return ret;
1190 }
1191
1192 static void
1193 nouveau_ttm_io_mem_free(struct ttm_device *bdev, struct ttm_resource *reg)
1194 {
1195         struct nouveau_drm *drm = nouveau_bdev(bdev);
1196
1197         mutex_lock(&drm->ttm.io_reserve_mutex);
1198         nouveau_ttm_io_mem_free_locked(drm, reg);
1199         mutex_unlock(&drm->ttm.io_reserve_mutex);
1200 }
1201
1202 vm_fault_t nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
1203 {
1204         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
1205         struct nouveau_bo *nvbo = nouveau_bo(bo);
1206         struct nvkm_device *device = nvxx_device(&drm->client.device);
1207         u32 mappable = device->func->resource_size(device, 1) >> PAGE_SHIFT;
1208         int i, ret;
1209
1210         /* as long as the bo isn't in vram, and isn't tiled, we've got
1211          * nothing to do here.
1212          */
1213         if (bo->mem.mem_type != TTM_PL_VRAM) {
1214                 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA ||
1215                     !nvbo->kind)
1216                         return 0;
1217
1218                 if (bo->mem.mem_type != TTM_PL_SYSTEM)
1219                         return 0;
1220
1221                 nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_GART, 0);
1222
1223         } else {
1224                 /* make sure bo is in mappable vram */
1225                 if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA ||
1226                     bo->mem.start + bo->mem.num_pages < mappable)
1227                         return 0;
1228
1229                 for (i = 0; i < nvbo->placement.num_placement; ++i) {
1230                         nvbo->placements[i].fpfn = 0;
1231                         nvbo->placements[i].lpfn = mappable;
1232                 }
1233
1234                 for (i = 0; i < nvbo->placement.num_busy_placement; ++i) {
1235                         nvbo->busy_placements[i].fpfn = 0;
1236                         nvbo->busy_placements[i].lpfn = mappable;
1237                 }
1238
1239                 nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, 0);
1240         }
1241
1242         ret = nouveau_bo_validate(nvbo, false, false);
1243         if (unlikely(ret == -EBUSY || ret == -ERESTARTSYS))
1244                 return VM_FAULT_NOPAGE;
1245         else if (unlikely(ret))
1246                 return VM_FAULT_SIGBUS;
1247
1248         ttm_bo_move_to_lru_tail_unlocked(bo);
1249         return 0;
1250 }
1251
1252 static int
1253 nouveau_ttm_tt_populate(struct ttm_device *bdev,
1254                         struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
1255 {
1256         struct ttm_tt *ttm_dma = (void *)ttm;
1257         struct nouveau_drm *drm;
1258         struct device *dev;
1259         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
1260
1261         if (ttm_tt_is_populated(ttm))
1262                 return 0;
1263
1264         if (slave && ttm->sg) {
1265                 drm_prime_sg_to_dma_addr_array(ttm->sg, ttm_dma->dma_address,
1266                                                ttm->num_pages);
1267                 return 0;
1268         }
1269
1270         drm = nouveau_bdev(bdev);
1271         dev = drm->dev->dev;
1272
1273         return ttm_pool_alloc(&drm->ttm.bdev.pool, ttm, ctx);
1274 }
1275
1276 static void
1277 nouveau_ttm_tt_unpopulate(struct ttm_device *bdev,
1278                           struct ttm_tt *ttm)
1279 {
1280         struct nouveau_drm *drm;
1281         struct device *dev;
1282         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
1283
1284         if (slave)
1285                 return;
1286
1287         drm = nouveau_bdev(bdev);
1288         dev = drm->dev->dev;
1289
1290         return ttm_pool_free(&drm->ttm.bdev.pool, ttm);
1291 }
1292
1293 static void
1294 nouveau_ttm_tt_destroy(struct ttm_device *bdev,
1295                        struct ttm_tt *ttm)
1296 {
1297 #if IS_ENABLED(CONFIG_AGP)
1298         struct nouveau_drm *drm = nouveau_bdev(bdev);
1299         if (drm->agp.bridge) {
1300                 ttm_agp_unbind(ttm);
1301                 ttm_tt_destroy_common(bdev, ttm);
1302                 ttm_agp_destroy(ttm);
1303                 return;
1304         }
1305 #endif
1306         nouveau_sgdma_destroy(bdev, ttm);
1307 }
1308
1309 void
1310 nouveau_bo_fence(struct nouveau_bo *nvbo, struct nouveau_fence *fence, bool exclusive)
1311 {
1312         struct dma_resv *resv = nvbo->bo.base.resv;
1313
1314         if (exclusive)
1315                 dma_resv_add_excl_fence(resv, &fence->base);
1316         else if (fence)
1317                 dma_resv_add_shared_fence(resv, &fence->base);
1318 }
1319
1320 static void
1321 nouveau_bo_delete_mem_notify(struct ttm_buffer_object *bo)
1322 {
1323         nouveau_bo_move_ntfy(bo, NULL);
1324 }
1325
1326 struct ttm_device_funcs nouveau_bo_driver = {
1327         .ttm_tt_create = &nouveau_ttm_tt_create,
1328         .ttm_tt_populate = &nouveau_ttm_tt_populate,
1329         .ttm_tt_unpopulate = &nouveau_ttm_tt_unpopulate,
1330         .ttm_tt_destroy = &nouveau_ttm_tt_destroy,
1331         .eviction_valuable = ttm_bo_eviction_valuable,
1332         .evict_flags = nouveau_bo_evict_flags,
1333         .delete_mem_notify = nouveau_bo_delete_mem_notify,
1334         .move = nouveau_bo_move,
1335         .verify_access = nouveau_bo_verify_access,
1336         .io_mem_reserve = &nouveau_ttm_io_mem_reserve,
1337         .io_mem_free = &nouveau_ttm_io_mem_free,
1338 };