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 struct ttm_placement vmw_vram_gmr_placement = {
  96         .num_placement = 2,
  97         .placement = vram_gmr_placement_flags,
  98         .num_busy_placement = 1,
  99         .busy_placement = &gmr_placement_flags
 100 };
 101
 102 struct ttm_placement vmw_vram_sys_placement = {
 103         .num_placement = 1,
 104         .placement = &vram_placement_flags,
 105         .num_busy_placement = 1,
 106         .busy_placement = &sys_placement_flags
 107 };
 108
 109 struct ttm_placement vmw_sys_placement = {
 110         .num_placement = 1,
 111         .placement = &sys_placement_flags,
 112         .num_busy_placement = 1,
 113         .busy_placement = &sys_placement_flags
 114 };
 115
 116 static const struct ttm_place evictable_placement_flags[] = {
 117         {
 118                 .fpfn = 0,
 119                 .lpfn = 0,
 120                 .mem_type = TTM_PL_SYSTEM,
 121                 .flags = 0
 122         }, {
 123                 .fpfn = 0,
 124                 .lpfn = 0,
 125                 .mem_type = TTM_PL_VRAM,
 126                 .flags = 0
 127         }, {
 128                 .fpfn = 0,
 129                 .lpfn = 0,
 130                 .mem_type = VMW_PL_GMR,
 131                 .flags = 0
 132         }, {
 133                 .fpfn = 0,
 134                 .lpfn = 0,
 135                 .mem_type = VMW_PL_MOB,
 136                 .flags = 0
 137         }
 138 };
 139
 140 static const struct ttm_place nonfixed_placement_flags[] = {
 141         {
 142                 .fpfn = 0,
 143                 .lpfn = 0,
 144                 .mem_type = TTM_PL_SYSTEM,
 145                 .flags = 0
 146         }, {
 147                 .fpfn = 0,
 148                 .lpfn = 0,
 149                 .mem_type = VMW_PL_GMR,
 150                 .flags = 0
 151         }, {
 152                 .fpfn = 0,
 153                 .lpfn = 0,
 154                 .mem_type = VMW_PL_MOB,
 155                 .flags = 0
 156         }
 157 };
 158
 159 struct ttm_placement vmw_evictable_placement = {
 160         .num_placement = 4,
 161         .placement = evictable_placement_flags,
 162         .num_busy_placement = 1,
 163         .busy_placement = &sys_placement_flags
 164 };
 165
 166 struct ttm_placement vmw_srf_placement = {
 167         .num_placement = 1,
 168         .num_busy_placement = 2,
 169         .placement = &gmr_placement_flags,
 170         .busy_placement = gmr_vram_placement_flags
 171 };
 172
 173 struct ttm_placement vmw_mob_placement = {
 174         .num_placement = 1,
 175         .num_busy_placement = 1,
 176         .placement = &mob_placement_flags,
 177         .busy_placement = &mob_placement_flags
 178 };
 179
 180 struct ttm_placement vmw_nonfixed_placement = {
 181         .num_placement = 3,
 182         .placement = nonfixed_placement_flags,
 183         .num_busy_placement = 1,
 184         .busy_placement = &sys_placement_flags
 185 };
 186
 187 struct vmw_ttm_tt {
 188         struct ttm_tt dma_ttm;
 189         struct vmw_private *dev_priv;
 190         int gmr_id;
 191         struct vmw_mob *mob;
 192         int mem_type;
 193         struct sg_table sgt;
 194         struct vmw_sg_table vsgt;
 195         uint64_t sg_alloc_size;
 196         bool mapped;
 197         bool bound;
 198 };
 199
 200 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 201
 202 /**
 203  * Helper functions to advance a struct vmw_piter iterator.
 204  *
 205  * @viter: Pointer to the iterator.
 206  *
 207  * These functions return false if past the end of the list,
 208  * true otherwise. Functions are selected depending on the current
 209  * DMA mapping mode.
 210  */
 211 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 212 {
 213         return ++(viter->i) < viter->num_pages;
 214 }
 215
 216 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 217 {
 218         bool ret = __vmw_piter_non_sg_next(viter);
 219
 220         return __sg_page_iter_dma_next(&viter->iter) && ret;
 221 }
 222
 223
 224 /**
 225  * Helper functions to return a pointer to the current page.
 226  *
 227  * @viter: Pointer to the iterator
 228  *
 229  * These functions return a pointer to the page currently
 230  * pointed to by @viter. Functions are selected depending on the
 231  * current mapping mode.
 232  */
 233 static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
 234 {
 235         return viter->pages[viter->i];
 236 }
 237
 238 /**
 239  * Helper functions to return the DMA address of the current page.
 240  *
 241  * @viter: Pointer to the iterator
 242  *
 243  * These functions return the DMA address of the page currently
 244  * pointed to by @viter. Functions are selected depending on the
 245  * current mapping mode.
 246  */
 247 static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
 248 {
 249         return page_to_phys(viter->pages[viter->i]);
 250 }
 251
 252 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 253 {
 254         return viter->addrs[viter->i];
 255 }
 256
 257 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 258 {
 259         return sg_page_iter_dma_address(&viter->iter);
 260 }
 261
 262
 263 /**
 264  * vmw_piter_start - Initialize a struct vmw_piter.
 265  *
 266  * @viter: Pointer to the iterator to initialize
 267  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 268  *
 269  * Note that we're following the convention of __sg_page_iter_start, so that
 270  * the iterator doesn't point to a valid page after initialization; it has
 271  * to be advanced one step first.
 272  */
 273 void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
 274                      unsigned long p_offset)
 275 {
 276         viter->i = p_offset - 1;
 277         viter->num_pages = vsgt->num_pages;
 278         viter->page = &__vmw_piter_non_sg_page;
 279         viter->pages = vsgt->pages;
 280         switch (vsgt->mode) {
 281         case vmw_dma_phys:
 282                 viter->next = &__vmw_piter_non_sg_next;
 283                 viter->dma_address = &__vmw_piter_phys_addr;
 284                 break;
 285         case vmw_dma_alloc_coherent:
 286                 viter->next = &__vmw_piter_non_sg_next;
 287                 viter->dma_address = &__vmw_piter_dma_addr;
 288                 viter->addrs = vsgt->addrs;
 289                 break;
 290         case vmw_dma_map_populate:
 291         case vmw_dma_map_bind:
 292                 viter->next = &__vmw_piter_sg_next;
 293                 viter->dma_address = &__vmw_piter_sg_addr;
 294                 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
 295                                      vsgt->sgt->orig_nents, p_offset);
 296                 break;
 297         default:
 298                 BUG();
 299         }
 300 }
 301
 302 /**
 303  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 304  * TTM pages
 305  *
 306  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 307  *
 308  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 309  */
 310 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 311 {
 312         struct device *dev = vmw_tt->dev_priv->dev->dev;
 313
 314         dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 315         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 316 }
 317
 318 /**
 319  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 320  *
 321  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 322  *
 323  * This function is used to get device addresses from the kernel DMA layer.
 324  * However, it's violating the DMA API in that when this operation has been
 325  * performed, it's illegal for the CPU to write to the pages without first
 326  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 327  * therefore only legal to call this function if we know that the function
 328  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 329  * a CPU write buffer flush.
 330  */
 331 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 332 {
 333         struct device *dev = vmw_tt->dev_priv->dev->dev;
 334
 335         return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 336 }
 337
 338 /**
 339  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 340  *
 341  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 342  *
 343  * Select the correct function for and make sure the TTM pages are
 344  * visible to the device. Allocate storage for the device mappings.
 345  * If a mapping has already been performed, indicated by the storage
 346  * pointer being non NULL, the function returns success.
 347  */
 348 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 349 {
 350         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 351         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 352         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 353         struct ttm_operation_ctx ctx = {
 354                 .interruptible = true,
 355                 .no_wait_gpu = false
 356         };
 357         struct vmw_piter iter;
 358         dma_addr_t old;
 359         int ret = 0;
 360         static size_t sgl_size;
 361         static size_t sgt_size;
 362         struct scatterlist *sg;
 363
 364         if (vmw_tt->mapped)
 365                 return 0;
 366
 367         vsgt->mode = dev_priv->map_mode;
 368         vsgt->pages = vmw_tt->dma_ttm.pages;
 369         vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
 370         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 371         vsgt->sgt = &vmw_tt->sgt;
 372
 373         switch (dev_priv->map_mode) {
 374         case vmw_dma_map_bind:
 375         case vmw_dma_map_populate:
 376                 if (unlikely(!sgl_size)) {
 377                         sgl_size = ttm_round_pot(sizeof(struct scatterlist));
 378                         sgt_size = ttm_round_pot(sizeof(struct sg_table));
 379                 }
 380                 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
 381                 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
 382                 if (unlikely(ret != 0))
 383                         return ret;
 384
 385                 sg = __sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
 386                                 vsgt->num_pages, 0,
 387                                 (unsigned long) vsgt->num_pages << PAGE_SHIFT,
 388                                 dma_get_max_seg_size(dev_priv->dev->dev),
 389                                 NULL, 0, GFP_KERNEL);
 390                 if (IS_ERR(sg)) {
 391                         ret = PTR_ERR(sg);
 392                         goto out_sg_alloc_fail;
 393                 }
 394
 395                 if (vsgt->num_pages > vmw_tt->sgt.orig_nents) {
 396                         uint64_t over_alloc =
 397                                 sgl_size * (vsgt->num_pages -
 398                                             vmw_tt->sgt.orig_nents);
 399
 400                         ttm_mem_global_free(glob, over_alloc);
 401                         vmw_tt->sg_alloc_size -= over_alloc;
 402                 }
 403
 404                 ret = vmw_ttm_map_for_dma(vmw_tt);
 405                 if (unlikely(ret != 0))
 406                         goto out_map_fail;
 407
 408                 break;
 409         default:
 410                 break;
 411         }
 412
 413         old = ~((dma_addr_t) 0);
 414         vmw_tt->vsgt.num_regions = 0;
 415         for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
 416                 dma_addr_t cur = vmw_piter_dma_addr(&iter);
 417
 418                 if (cur != old + PAGE_SIZE)
 419                         vmw_tt->vsgt.num_regions++;
 420                 old = cur;
 421         }
 422
 423         vmw_tt->mapped = true;
 424         return 0;
 425
 426 out_map_fail:
 427         sg_free_table(vmw_tt->vsgt.sgt);
 428         vmw_tt->vsgt.sgt = NULL;
 429 out_sg_alloc_fail:
 430         ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
 431         return ret;
 432 }
 433
 434 /**
 435  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 436  *
 437  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 438  *
 439  * Tear down any previously set up device DMA mappings and free
 440  * any storage space allocated for them. If there are no mappings set up,
 441  * this function is a NOP.
 442  */
 443 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 444 {
 445         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 446
 447         if (!vmw_tt->vsgt.sgt)
 448                 return;
 449
 450         switch (dev_priv->map_mode) {
 451         case vmw_dma_map_bind:
 452         case vmw_dma_map_populate:
 453                 vmw_ttm_unmap_from_dma(vmw_tt);
 454                 sg_free_table(vmw_tt->vsgt.sgt);
 455                 vmw_tt->vsgt.sgt = NULL;
 456                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 457                                     vmw_tt->sg_alloc_size);
 458                 break;
 459         default:
 460                 break;
 461         }
 462         vmw_tt->mapped = false;
 463 }
 464
 465 /**
 466  * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 467  * TTM buffer object
 468  *
 469  * @bo: Pointer to a struct ttm_buffer_object
 470  *
 471  * Returns a pointer to a struct vmw_sg_table object. The object should
 472  * not be freed after use.
 473  * Note that for the device addresses to be valid, the buffer object must
 474  * either be reserved or pinned.
 475  */
 476 const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
 477 {
 478         struct vmw_ttm_tt *vmw_tt =
 479                 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 480
 481         return &vmw_tt->vsgt;
 482 }
 483
 484
 485 static int vmw_ttm_bind(struct ttm_bo_device *bdev,
 486                         struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 487 {
 488         struct vmw_ttm_tt *vmw_be =
 489                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 490         int ret = 0;
 491
 492         if (!bo_mem)
 493                 return -EINVAL;
 494
 495         if (vmw_be->bound)
 496                 return 0;
 497
 498         ret = vmw_ttm_map_dma(vmw_be);
 499         if (unlikely(ret != 0))
 500                 return ret;
 501
 502         vmw_be->gmr_id = bo_mem->start;
 503         vmw_be->mem_type = bo_mem->mem_type;
 504
 505         switch (bo_mem->mem_type) {
 506         case VMW_PL_GMR:
 507                 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 508                                     ttm->num_pages, vmw_be->gmr_id);
 509                 break;
 510         case VMW_PL_MOB:
 511                 if (unlikely(vmw_be->mob == NULL)) {
 512                         vmw_be->mob =
 513                                 vmw_mob_create(ttm->num_pages);
 514                         if (unlikely(vmw_be->mob == NULL))
 515                                 return -ENOMEM;
 516                 }
 517
 518                 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
 519                                     &vmw_be->vsgt, ttm->num_pages,
 520                                     vmw_be->gmr_id);
 521                 break;
 522         default:
 523                 BUG();
 524         }
 525         vmw_be->bound = true;
 526         return ret;
 527 }
 528
 529 static void vmw_ttm_unbind(struct ttm_bo_device *bdev,
 530                            struct ttm_tt *ttm)
 531 {
 532         struct vmw_ttm_tt *vmw_be =
 533                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 534
 535         if (!vmw_be->bound)
 536                 return;
 537
 538         switch (vmw_be->mem_type) {
 539         case VMW_PL_GMR:
 540                 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 541                 break;
 542         case VMW_PL_MOB:
 543                 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
 544                 break;
 545         default:
 546                 BUG();
 547         }
 548
 549         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 550                 vmw_ttm_unmap_dma(vmw_be);
 551         vmw_be->bound = false;
 552 }
 553
 554
 555 static void vmw_ttm_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
 556 {
 557         struct vmw_ttm_tt *vmw_be =
 558                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 559
 560         vmw_ttm_unbind(bdev, ttm);
 561         ttm_tt_destroy_common(bdev, ttm);
 562         vmw_ttm_unmap_dma(vmw_be);
 563         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 564                 ttm_tt_fini(&vmw_be->dma_ttm);
 565         else
 566                 ttm_tt_fini(ttm);
 567
 568         if (vmw_be->mob)
 569                 vmw_mob_destroy(vmw_be->mob);
 570
 571         kfree(vmw_be);
 572 }
 573
 574
 575 static int vmw_ttm_populate(struct ttm_bo_device *bdev,
 576                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 577 {
 578         /* TODO: maybe completely drop this ? */
 579         if (ttm_tt_is_populated(ttm))
 580                 return 0;
 581
 582         return ttm_pool_alloc(&bdev->pool, ttm, ctx);
 583 }
 584
 585 static void vmw_ttm_unpopulate(struct ttm_bo_device *bdev,
 586                                struct ttm_tt *ttm)
 587 {
 588         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 589                                                  dma_ttm);
 590
 591         if (vmw_tt->mob) {
 592                 vmw_mob_destroy(vmw_tt->mob);
 593                 vmw_tt->mob = NULL;
 594         }
 595
 596         vmw_ttm_unmap_dma(vmw_tt);
 597         ttm_pool_free(&bdev->pool, ttm);
 598 }
 599
 600 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 601                                         uint32_t page_flags)
 602 {
 603         struct vmw_ttm_tt *vmw_be;
 604         int ret;
 605
 606         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 607         if (!vmw_be)
 608                 return NULL;
 609
 610         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 611         vmw_be->mob = NULL;
 612
 613         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 614                 ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 615                                       ttm_cached);
 616         else
 617                 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 618                                   ttm_cached);
 619         if (unlikely(ret != 0))
 620                 goto out_no_init;
 621
 622         return &vmw_be->dma_ttm;
 623 out_no_init:
 624         kfree(vmw_be);
 625         return NULL;
 626 }
 627
 628 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 629                      struct ttm_placement *placement)
 630 {
 631         *placement = vmw_sys_placement;
 632 }
 633
 634 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 635 {
 636         struct ttm_object_file *tfile =
 637                 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
 638
 639         return vmw_user_bo_verify_access(bo, tfile);
 640 }
 641
 642 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem)
 643 {
 644         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 645
 646         switch (mem->mem_type) {
 647         case TTM_PL_SYSTEM:
 648         case VMW_PL_GMR:
 649         case VMW_PL_MOB:
 650                 return 0;
 651         case TTM_PL_VRAM:
 652                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 653                         dev_priv->vram_start;
 654                 mem->bus.is_iomem = true;
 655                 mem->bus.caching = ttm_cached;
 656                 break;
 657         default:
 658                 return -EINVAL;
 659         }
 660         return 0;
 661 }
 662
 663 /**
 664  * vmw_move_notify - TTM move_notify_callback
 665  *
 666  * @bo: The TTM buffer object about to move.
 667  * @mem: The struct ttm_resource indicating to what memory
 668  *       region the move is taking place.
 669  *
 670  * Calls move_notify for all subsystems needing it.
 671  * (currently only resources).
 672  */
 673 static void vmw_move_notify(struct ttm_buffer_object *bo,
 674                             bool evict,
 675                             struct ttm_resource *mem)
 676 {
 677         if (!mem)
 678                 return;
 679         vmw_bo_move_notify(bo, mem);
 680         vmw_query_move_notify(bo, mem);
 681 }
 682
 683
 684 /**
 685  * vmw_swap_notify - TTM move_notify_callback
 686  *
 687  * @bo: The TTM buffer object about to be swapped out.
 688  */
 689 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 690 {
 691         vmw_bo_swap_notify(bo);
 692         (void) ttm_bo_wait(bo, false, false);
 693 }
 694
 695 static int vmw_move(struct ttm_buffer_object *bo,
 696                     bool evict,
 697                     struct ttm_operation_ctx *ctx,
 698                     struct ttm_resource *new_mem,
 699                     struct ttm_place *hop)
 700 {
 701         struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->mem.mem_type);
 702         struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
 703         int ret;
 704
 705         if (new_man->use_tt && new_mem->mem_type != TTM_PL_SYSTEM) {
 706                 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
 707                 if (ret)
 708                         return ret;
 709         }
 710
 711         vmw_move_notify(bo, evict, new_mem);
 712
 713         if (old_man->use_tt && new_man->use_tt) {
 714                 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
 715                         ttm_bo_assign_mem(bo, new_mem);
 716                         return 0;
 717                 }
 718                 ret = ttm_bo_wait_ctx(bo, ctx);
 719                 if (ret)
 720                         goto fail;
 721
 722                 vmw_ttm_unbind(bo->bdev, bo->ttm);
 723                 ttm_resource_free(bo, &bo->mem);
 724                 ttm_bo_assign_mem(bo, new_mem);
 725                 return 0;
 726         } else {
 727                 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 728                 if (ret)
 729                         goto fail;
 730         }
 731         return 0;
 732 fail:
 733         swap(*new_mem, bo->mem);
 734         vmw_move_notify(bo, false, new_mem);
 735         swap(*new_mem, bo->mem);
 736         return ret;
 737 }
 738
 739 static void
 740 vmw_delete_mem_notify(struct ttm_buffer_object *bo)
 741 {
 742         vmw_move_notify(bo, false, NULL);
 743 }
 744
 745 struct ttm_bo_driver vmw_bo_driver = {
 746         .ttm_tt_create = &vmw_ttm_tt_create,
 747         .ttm_tt_populate = &vmw_ttm_populate,
 748         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 749         .ttm_tt_destroy = &vmw_ttm_destroy,
 750         .eviction_valuable = ttm_bo_eviction_valuable,
 751         .evict_flags = vmw_evict_flags,
 752         .move = vmw_move,
 753         .verify_access = vmw_verify_access,
 754         .delete_mem_notify = vmw_delete_mem_notify,
 755         .swap_notify = vmw_swap_notify,
 756         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 757 };
 758
 759 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 760                                unsigned long bo_size,
 761                                struct ttm_buffer_object **bo_p)
 762 {
 763         struct ttm_operation_ctx ctx = {
 764                 .interruptible = false,
 765                 .no_wait_gpu = false
 766         };
 767         struct ttm_buffer_object *bo;
 768         int ret;
 769
 770         ret = vmw_bo_create_kernel(dev_priv, bo_size,
 771                                    &vmw_sys_placement,
 772                                    &bo);
 773         if (unlikely(ret != 0))
 774                 return ret;
 775
 776         ret = ttm_bo_reserve(bo, false, true, NULL);
 777         BUG_ON(ret != 0);
 778         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 779         if (likely(ret == 0)) {
 780                 struct vmw_ttm_tt *vmw_tt =
 781                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 782                 ret = vmw_ttm_map_dma(vmw_tt);
 783         }
 784
 785         ttm_bo_unreserve(bo);
 786
 787         if (likely(ret == 0))
 788                 *bo_p = bo;
 789         return ret;
 790 }