drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include <drm/ttm/ttm_bo_driver.h>
  30 #include <drm/ttm/ttm_placement.h>
  31
  32 static const struct ttm_place vram_placement_flags = {
  33         .fpfn = 0,
  34         .lpfn = 0,
  35         .mem_type = TTM_PL_VRAM,
  36         .flags = 0
  37 };
  38
  39 static const struct ttm_place sys_placement_flags = {
  40         .fpfn = 0,
  41         .lpfn = 0,
  42         .mem_type = TTM_PL_SYSTEM,
  43         .flags = 0
  44 };
  45
  46 static const struct ttm_place gmr_placement_flags = {
  47         .fpfn = 0,
  48         .lpfn = 0,
  49         .mem_type = VMW_PL_GMR,
  50         .flags = 0
  51 };
  52
  53 static const struct ttm_place mob_placement_flags = {
  54         .fpfn = 0,
  55         .lpfn = 0,
  56         .mem_type = VMW_PL_MOB,
  57         .flags = 0
  58 };
  59
  60 struct ttm_placement vmw_vram_placement = {
  61         .num_placement = 1,
  62         .placement = &vram_placement_flags,
  63         .num_busy_placement = 1,
  64         .busy_placement = &vram_placement_flags
  65 };
  66
  67 static const struct ttm_place vram_gmr_placement_flags[] = {
  68         {
  69                 .fpfn = 0,
  70                 .lpfn = 0,
  71                 .mem_type = TTM_PL_VRAM,
  72                 .flags = 0
  73         }, {
  74                 .fpfn = 0,
  75                 .lpfn = 0,
  76                 .mem_type = VMW_PL_GMR,
  77                 .flags = 0
  78         }
  79 };
  80
  81 static const struct ttm_place gmr_vram_placement_flags[] = {
  82         {
  83                 .fpfn = 0,
  84                 .lpfn = 0,
  85                 .mem_type = VMW_PL_GMR,
  86                 .flags = 0
  87         }, {
  88                 .fpfn = 0,
  89                 .lpfn = 0,
  90                 .mem_type = TTM_PL_VRAM,
  91                 .flags = 0
  92         }
  93 };
  94
  95 static const struct ttm_place vmw_sys_placement_flags = {
  96         .fpfn = 0,
  97         .lpfn = 0,
  98         .mem_type = VMW_PL_SYSTEM,
  99         .flags = 0
 100 };
 101
 102 struct ttm_placement vmw_vram_gmr_placement = {
 103         .num_placement = 2,
 104         .placement = vram_gmr_placement_flags,
 105         .num_busy_placement = 1,
 106         .busy_placement = &gmr_placement_flags
 107 };
 108
 109 struct ttm_placement vmw_vram_sys_placement = {
 110         .num_placement = 1,
 111         .placement = &vram_placement_flags,
 112         .num_busy_placement = 1,
 113         .busy_placement = &sys_placement_flags
 114 };
 115
 116 struct ttm_placement vmw_sys_placement = {
 117         .num_placement = 1,
 118         .placement = &sys_placement_flags,
 119         .num_busy_placement = 1,
 120         .busy_placement = &sys_placement_flags
 121 };
 122
 123 struct ttm_placement vmw_pt_sys_placement = {
 124         .num_placement = 1,
 125         .placement = &vmw_sys_placement_flags,
 126         .num_busy_placement = 1,
 127         .busy_placement = &vmw_sys_placement_flags
 128 };
 129
 130 static const struct ttm_place nonfixed_placement_flags[] = {
 131         {
 132                 .fpfn = 0,
 133                 .lpfn = 0,
 134                 .mem_type = TTM_PL_SYSTEM,
 135                 .flags = 0
 136         }, {
 137                 .fpfn = 0,
 138                 .lpfn = 0,
 139                 .mem_type = VMW_PL_GMR,
 140                 .flags = 0
 141         }, {
 142                 .fpfn = 0,
 143                 .lpfn = 0,
 144                 .mem_type = VMW_PL_MOB,
 145                 .flags = 0
 146         }
 147 };
 148
 149 struct ttm_placement vmw_srf_placement = {
 150         .num_placement = 1,
 151         .num_busy_placement = 2,
 152         .placement = &gmr_placement_flags,
 153         .busy_placement = gmr_vram_placement_flags
 154 };
 155
 156 struct ttm_placement vmw_mob_placement = {
 157         .num_placement = 1,
 158         .num_busy_placement = 1,
 159         .placement = &mob_placement_flags,
 160         .busy_placement = &mob_placement_flags
 161 };
 162
 163 struct ttm_placement vmw_nonfixed_placement = {
 164         .num_placement = 3,
 165         .placement = nonfixed_placement_flags,
 166         .num_busy_placement = 1,
 167         .busy_placement = &sys_placement_flags
 168 };
 169
 170 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 171
 172 /**
 173  * __vmw_piter_non_sg_next: Helper functions to advance
 174  * a struct vmw_piter iterator.
 175  *
 176  * @viter: Pointer to the iterator.
 177  *
 178  * These functions return false if past the end of the list,
 179  * true otherwise. Functions are selected depending on the current
 180  * DMA mapping mode.
 181  */
 182 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 183 {
 184         return ++(viter->i) < viter->num_pages;
 185 }
 186
 187 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 188 {
 189         bool ret = __vmw_piter_non_sg_next(viter);
 190
 191         return __sg_page_iter_dma_next(&viter->iter) && ret;
 192 }
 193
 194
 195 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 196 {
 197         return viter->addrs[viter->i];
 198 }
 199
 200 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 201 {
 202         return sg_page_iter_dma_address(&viter->iter);
 203 }
 204
 205
 206 /**
 207  * vmw_piter_start - Initialize a struct vmw_piter.
 208  *
 209  * @viter: Pointer to the iterator to initialize
 210  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 211  * @p_offset: Pointer offset used to update current array position
 212  *
 213  * Note that we're following the convention of __sg_page_iter_start, so that
 214  * the iterator doesn't point to a valid page after initialization; it has
 215  * to be advanced one step first.
 216  */
 217 void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
 218                      unsigned long p_offset)
 219 {
 220         viter->i = p_offset - 1;
 221         viter->num_pages = vsgt->num_pages;
 222         viter->pages = vsgt->pages;
 223         switch (vsgt->mode) {
 224         case vmw_dma_alloc_coherent:
 225                 viter->next = &__vmw_piter_non_sg_next;
 226                 viter->dma_address = &__vmw_piter_dma_addr;
 227                 viter->addrs = vsgt->addrs;
 228                 break;
 229         case vmw_dma_map_populate:
 230         case vmw_dma_map_bind:
 231                 viter->next = &__vmw_piter_sg_next;
 232                 viter->dma_address = &__vmw_piter_sg_addr;
 233                 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
 234                                      vsgt->sgt->orig_nents, p_offset);
 235                 break;
 236         default:
 237                 BUG();
 238         }
 239 }
 240
 241 /**
 242  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 243  * TTM pages
 244  *
 245  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 246  *
 247  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 248  */
 249 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 250 {
 251         struct device *dev = vmw_tt->dev_priv->drm.dev;
 252
 253         dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 254         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 255 }
 256
 257 /**
 258  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 259  *
 260  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 261  *
 262  * This function is used to get device addresses from the kernel DMA layer.
 263  * However, it's violating the DMA API in that when this operation has been
 264  * performed, it's illegal for the CPU to write to the pages without first
 265  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 266  * therefore only legal to call this function if we know that the function
 267  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 268  * a CPU write buffer flush.
 269  */
 270 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 271 {
 272         struct device *dev = vmw_tt->dev_priv->drm.dev;
 273
 274         return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 275 }
 276
 277 /**
 278  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 279  *
 280  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 281  *
 282  * Select the correct function for and make sure the TTM pages are
 283  * visible to the device. Allocate storage for the device mappings.
 284  * If a mapping has already been performed, indicated by the storage
 285  * pointer being non NULL, the function returns success.
 286  */
 287 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 288 {
 289         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 290         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 291         int ret = 0;
 292
 293         if (vmw_tt->mapped)
 294                 return 0;
 295
 296         vsgt->mode = dev_priv->map_mode;
 297         vsgt->pages = vmw_tt->dma_ttm.pages;
 298         vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
 299         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 300         vsgt->sgt = NULL;
 301
 302         switch (dev_priv->map_mode) {
 303         case vmw_dma_map_bind:
 304         case vmw_dma_map_populate:
 305                 vsgt->sgt = &vmw_tt->sgt;
 306                 ret = sg_alloc_table_from_pages_segment(
 307                         &vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
 308                         (unsigned long)vsgt->num_pages << PAGE_SHIFT,
 309                         dma_get_max_seg_size(dev_priv->drm.dev), GFP_KERNEL);
 310                 if (ret)
 311                         goto out_sg_alloc_fail;
 312
 313                 ret = vmw_ttm_map_for_dma(vmw_tt);
 314                 if (unlikely(ret != 0))
 315                         goto out_map_fail;
 316
 317                 break;
 318         default:
 319                 break;
 320         }
 321
 322         vmw_tt->mapped = true;
 323         return 0;
 324
 325 out_map_fail:
 326         sg_free_table(vmw_tt->vsgt.sgt);
 327         vmw_tt->vsgt.sgt = NULL;
 328 out_sg_alloc_fail:
 329         return ret;
 330 }
 331
 332 /**
 333  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 334  *
 335  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 336  *
 337  * Tear down any previously set up device DMA mappings and free
 338  * any storage space allocated for them. If there are no mappings set up,
 339  * this function is a NOP.
 340  */
 341 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 342 {
 343         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 344
 345         if (!vmw_tt->vsgt.sgt)
 346                 return;
 347
 348         switch (dev_priv->map_mode) {
 349         case vmw_dma_map_bind:
 350         case vmw_dma_map_populate:
 351                 vmw_ttm_unmap_from_dma(vmw_tt);
 352                 sg_free_table(vmw_tt->vsgt.sgt);
 353                 vmw_tt->vsgt.sgt = NULL;
 354                 break;
 355         default:
 356                 break;
 357         }
 358         vmw_tt->mapped = false;
 359 }
 360
 361 /**
 362  * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 363  * TTM buffer object
 364  *
 365  * @bo: Pointer to a struct ttm_buffer_object
 366  *
 367  * Returns a pointer to a struct vmw_sg_table object. The object should
 368  * not be freed after use.
 369  * Note that for the device addresses to be valid, the buffer object must
 370  * either be reserved or pinned.
 371  */
 372 const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
 373 {
 374         struct vmw_ttm_tt *vmw_tt =
 375                 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 376
 377         return &vmw_tt->vsgt;
 378 }
 379
 380
 381 static int vmw_ttm_bind(struct ttm_device *bdev,
 382                         struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 383 {
 384         struct vmw_ttm_tt *vmw_be =
 385                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 386         int ret = 0;
 387
 388         if (!bo_mem)
 389                 return -EINVAL;
 390
 391         if (vmw_be->bound)
 392                 return 0;
 393
 394         ret = vmw_ttm_map_dma(vmw_be);
 395         if (unlikely(ret != 0))
 396                 return ret;
 397
 398         vmw_be->gmr_id = bo_mem->start;
 399         vmw_be->mem_type = bo_mem->mem_type;
 400
 401         switch (bo_mem->mem_type) {
 402         case VMW_PL_GMR:
 403                 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 404                                     ttm->num_pages, vmw_be->gmr_id);
 405                 break;
 406         case VMW_PL_MOB:
 407                 if (unlikely(vmw_be->mob == NULL)) {
 408                         vmw_be->mob =
 409                                 vmw_mob_create(ttm->num_pages);
 410                         if (unlikely(vmw_be->mob == NULL))
 411                                 return -ENOMEM;
 412                 }
 413
 414                 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
 415                                     &vmw_be->vsgt, ttm->num_pages,
 416                                     vmw_be->gmr_id);
 417                 break;
 418         case VMW_PL_SYSTEM:
 419                 /* Nothing to be done for a system bind */
 420                 break;
 421         default:
 422                 BUG();
 423         }
 424         vmw_be->bound = true;
 425         return ret;
 426 }
 427
 428 static void vmw_ttm_unbind(struct ttm_device *bdev,
 429                            struct ttm_tt *ttm)
 430 {
 431         struct vmw_ttm_tt *vmw_be =
 432                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 433
 434         if (!vmw_be->bound)
 435                 return;
 436
 437         switch (vmw_be->mem_type) {
 438         case VMW_PL_GMR:
 439                 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 440                 break;
 441         case VMW_PL_MOB:
 442                 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
 443                 break;
 444         case VMW_PL_SYSTEM:
 445                 break;
 446         default:
 447                 BUG();
 448         }
 449
 450         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 451                 vmw_ttm_unmap_dma(vmw_be);
 452         vmw_be->bound = false;
 453 }
 454
 455
 456 static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 457 {
 458         struct vmw_ttm_tt *vmw_be =
 459                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 460
 461         vmw_ttm_unmap_dma(vmw_be);
 462         ttm_tt_fini(ttm);
 463         if (vmw_be->mob)
 464                 vmw_mob_destroy(vmw_be->mob);
 465
 466         kfree(vmw_be);
 467 }
 468
 469
 470 static int vmw_ttm_populate(struct ttm_device *bdev,
 471                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 472 {
 473         int ret;
 474
 475         /* TODO: maybe completely drop this ? */
 476         if (ttm_tt_is_populated(ttm))
 477                 return 0;
 478
 479         ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
 480
 481         return ret;
 482 }
 483
 484 static void vmw_ttm_unpopulate(struct ttm_device *bdev,
 485                                struct ttm_tt *ttm)
 486 {
 487         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 488                                                  dma_ttm);
 489
 490         vmw_ttm_unbind(bdev, ttm);
 491
 492         if (vmw_tt->mob) {
 493                 vmw_mob_destroy(vmw_tt->mob);
 494                 vmw_tt->mob = NULL;
 495         }
 496
 497         vmw_ttm_unmap_dma(vmw_tt);
 498
 499         ttm_pool_free(&bdev->pool, ttm);
 500 }
 501
 502 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 503                                         uint32_t page_flags)
 504 {
 505         struct vmw_ttm_tt *vmw_be;
 506         int ret;
 507
 508         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 509         if (!vmw_be)
 510                 return NULL;
 511
 512         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 513         vmw_be->mob = NULL;
 514
 515         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 516                 ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 517                                      ttm_cached);
 518         else
 519                 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 520                                   ttm_cached, 0);
 521         if (unlikely(ret != 0))
 522                 goto out_no_init;
 523
 524         return &vmw_be->dma_ttm;
 525 out_no_init:
 526         kfree(vmw_be);
 527         return NULL;
 528 }
 529
 530 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 531                      struct ttm_placement *placement)
 532 {
 533         *placement = vmw_sys_placement;
 534 }
 535
 536 static int vmw_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
 537 {
 538         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 539
 540         switch (mem->mem_type) {
 541         case TTM_PL_SYSTEM:
 542         case VMW_PL_SYSTEM:
 543         case VMW_PL_GMR:
 544         case VMW_PL_MOB:
 545                 return 0;
 546         case TTM_PL_VRAM:
 547                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 548                         dev_priv->vram_start;
 549                 mem->bus.is_iomem = true;
 550                 mem->bus.caching = ttm_cached;
 551                 break;
 552         default:
 553                 return -EINVAL;
 554         }
 555         return 0;
 556 }
 557
 558 /**
 559  * vmw_move_notify - TTM move_notify_callback
 560  *
 561  * @bo: The TTM buffer object about to move.
 562  * @old_mem: The old memory where we move from
 563  * @new_mem: The struct ttm_resource indicating to what memory
 564  *       region the move is taking place.
 565  *
 566  * Calls move_notify for all subsystems needing it.
 567  * (currently only resources).
 568  */
 569 static void vmw_move_notify(struct ttm_buffer_object *bo,
 570                             struct ttm_resource *old_mem,
 571                             struct ttm_resource *new_mem)
 572 {
 573         vmw_bo_move_notify(bo, new_mem);
 574         vmw_query_move_notify(bo, old_mem, new_mem);
 575 }
 576
 577
 578 /**
 579  * vmw_swap_notify - TTM move_notify_callback
 580  *
 581  * @bo: The TTM buffer object about to be swapped out.
 582  */
 583 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 584 {
 585         vmw_bo_swap_notify(bo);
 586         (void) ttm_bo_wait(bo, false, false);
 587 }
 588
 589 static bool vmw_memtype_is_system(uint32_t mem_type)
 590 {
 591         return mem_type == TTM_PL_SYSTEM || mem_type == VMW_PL_SYSTEM;
 592 }
 593
 594 static int vmw_move(struct ttm_buffer_object *bo,
 595                     bool evict,
 596                     struct ttm_operation_ctx *ctx,
 597                     struct ttm_resource *new_mem,
 598                     struct ttm_place *hop)
 599 {
 600         struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
 601         struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
 602         int ret;
 603
 604         if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) {
 605                 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
 606                 if (ret)
 607                         return ret;
 608         }
 609
 610         vmw_move_notify(bo, bo->resource, new_mem);
 611
 612         if (old_man->use_tt && new_man->use_tt) {
 613                 if (vmw_memtype_is_system(bo->resource->mem_type)) {
 614                         ttm_bo_move_null(bo, new_mem);
 615                         return 0;
 616                 }
 617                 ret = ttm_bo_wait_ctx(bo, ctx);
 618                 if (ret)
 619                         goto fail;
 620
 621                 vmw_ttm_unbind(bo->bdev, bo->ttm);
 622                 ttm_resource_free(bo, &bo->resource);
 623                 ttm_bo_assign_mem(bo, new_mem);
 624                 return 0;
 625         } else {
 626                 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 627                 if (ret)
 628                         goto fail;
 629         }
 630         return 0;
 631 fail:
 632         vmw_move_notify(bo, new_mem, bo->resource);
 633         return ret;
 634 }
 635
 636 struct ttm_device_funcs vmw_bo_driver = {
 637         .ttm_tt_create = &vmw_ttm_tt_create,
 638         .ttm_tt_populate = &vmw_ttm_populate,
 639         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 640         .ttm_tt_destroy = &vmw_ttm_destroy,
 641         .eviction_valuable = ttm_bo_eviction_valuable,
 642         .evict_flags = vmw_evict_flags,
 643         .move = vmw_move,
 644         .swap_notify = vmw_swap_notify,
 645         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 646 };
 647
 648 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 649                                unsigned long bo_size,
 650                                struct ttm_buffer_object **bo_p)
 651 {
 652         struct ttm_operation_ctx ctx = {
 653                 .interruptible = false,
 654                 .no_wait_gpu = false
 655         };
 656         struct ttm_buffer_object *bo;
 657         int ret;
 658
 659         ret = vmw_bo_create_kernel(dev_priv, bo_size,
 660                                    &vmw_pt_sys_placement,
 661                                    &bo);
 662         if (unlikely(ret != 0))
 663                 return ret;
 664
 665         ret = ttm_bo_reserve(bo, false, true, NULL);
 666         BUG_ON(ret != 0);
 667         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 668         if (likely(ret == 0)) {
 669                 struct vmw_ttm_tt *vmw_tt =
 670                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 671                 ret = vmw_ttm_map_dma(vmw_tt);
 672         }
 673
 674         ttm_bo_unreserve(bo);
 675
 676         if (likely(ret == 0))
 677                 *bo_p = bo;
 678         return ret;
 679 }