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  * @p_offset: Pointer offset used to update current array position
 269  *
 270  * Note that we're following the convention of __sg_page_iter_start, so that
 271  * the iterator doesn't point to a valid page after initialization; it has
 272  * to be advanced one step first.
 273  */
 274 void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
 275                      unsigned long p_offset)
 276 {
 277         viter->i = p_offset - 1;
 278         viter->num_pages = vsgt->num_pages;
 279         viter->page = &__vmw_piter_non_sg_page;
 280         viter->pages = vsgt->pages;
 281         switch (vsgt->mode) {
 282         case vmw_dma_phys:
 283                 viter->next = &__vmw_piter_non_sg_next;
 284                 viter->dma_address = &__vmw_piter_phys_addr;
 285                 break;
 286         case vmw_dma_alloc_coherent:
 287                 viter->next = &__vmw_piter_non_sg_next;
 288                 viter->dma_address = &__vmw_piter_dma_addr;
 289                 viter->addrs = vsgt->addrs;
 290                 break;
 291         case vmw_dma_map_populate:
 292         case vmw_dma_map_bind:
 293                 viter->next = &__vmw_piter_sg_next;
 294                 viter->dma_address = &__vmw_piter_sg_addr;
 295                 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
 296                                      vsgt->sgt->orig_nents, p_offset);
 297                 break;
 298         default:
 299                 BUG();
 300         }
 301 }
 302
 303 /**
 304  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 305  * TTM pages
 306  *
 307  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 308  *
 309  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 310  */
 311 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 312 {
 313         struct device *dev = vmw_tt->dev_priv->drm.dev;
 314
 315         dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 316         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 317 }
 318
 319 /**
 320  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 321  *
 322  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 323  *
 324  * This function is used to get device addresses from the kernel DMA layer.
 325  * However, it's violating the DMA API in that when this operation has been
 326  * performed, it's illegal for the CPU to write to the pages without first
 327  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 328  * therefore only legal to call this function if we know that the function
 329  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 330  * a CPU write buffer flush.
 331  */
 332 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 333 {
 334         struct device *dev = vmw_tt->dev_priv->drm.dev;
 335
 336         return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 337 }
 338
 339 /**
 340  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 341  *
 342  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 343  *
 344  * Select the correct function for and make sure the TTM pages are
 345  * visible to the device. Allocate storage for the device mappings.
 346  * If a mapping has already been performed, indicated by the storage
 347  * pointer being non NULL, the function returns success.
 348  */
 349 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 350 {
 351         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 352         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 353         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 354         struct ttm_operation_ctx ctx = {
 355                 .interruptible = true,
 356                 .no_wait_gpu = false
 357         };
 358         struct vmw_piter iter;
 359         dma_addr_t old;
 360         int ret = 0;
 361         static size_t sgl_size;
 362         static size_t sgt_size;
 363         struct scatterlist *sg;
 364
 365         if (vmw_tt->mapped)
 366                 return 0;
 367
 368         vsgt->mode = dev_priv->map_mode;
 369         vsgt->pages = vmw_tt->dma_ttm.pages;
 370         vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
 371         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 372         vsgt->sgt = &vmw_tt->sgt;
 373
 374         switch (dev_priv->map_mode) {
 375         case vmw_dma_map_bind:
 376         case vmw_dma_map_populate:
 377                 if (unlikely(!sgl_size)) {
 378                         sgl_size = ttm_round_pot(sizeof(struct scatterlist));
 379                         sgt_size = ttm_round_pot(sizeof(struct sg_table));
 380                 }
 381                 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
 382                 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
 383                 if (unlikely(ret != 0))
 384                         return ret;
 385
 386                 sg = __sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
 387                                 vsgt->num_pages, 0,
 388                                 (unsigned long) vsgt->num_pages << PAGE_SHIFT,
 389                                 dma_get_max_seg_size(dev_priv->drm.dev),
 390                                 NULL, 0, GFP_KERNEL);
 391                 if (IS_ERR(sg)) {
 392                         ret = PTR_ERR(sg);
 393                         goto out_sg_alloc_fail;
 394                 }
 395
 396                 if (vsgt->num_pages > vmw_tt->sgt.orig_nents) {
 397                         uint64_t over_alloc =
 398                                 sgl_size * (vsgt->num_pages -
 399                                             vmw_tt->sgt.orig_nents);
 400
 401                         ttm_mem_global_free(glob, over_alloc);
 402                         vmw_tt->sg_alloc_size -= over_alloc;
 403                 }
 404
 405                 ret = vmw_ttm_map_for_dma(vmw_tt);
 406                 if (unlikely(ret != 0))
 407                         goto out_map_fail;
 408
 409                 break;
 410         default:
 411                 break;
 412         }
 413
 414         old = ~((dma_addr_t) 0);
 415         vmw_tt->vsgt.num_regions = 0;
 416         for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
 417                 dma_addr_t cur = vmw_piter_dma_addr(&iter);
 418
 419                 if (cur != old + PAGE_SIZE)
 420                         vmw_tt->vsgt.num_regions++;
 421                 old = cur;
 422         }
 423
 424         vmw_tt->mapped = true;
 425         return 0;
 426
 427 out_map_fail:
 428         sg_free_table(vmw_tt->vsgt.sgt);
 429         vmw_tt->vsgt.sgt = NULL;
 430 out_sg_alloc_fail:
 431         ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
 432         return ret;
 433 }
 434
 435 /**
 436  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 437  *
 438  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 439  *
 440  * Tear down any previously set up device DMA mappings and free
 441  * any storage space allocated for them. If there are no mappings set up,
 442  * this function is a NOP.
 443  */
 444 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 445 {
 446         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 447
 448         if (!vmw_tt->vsgt.sgt)
 449                 return;
 450
 451         switch (dev_priv->map_mode) {
 452         case vmw_dma_map_bind:
 453         case vmw_dma_map_populate:
 454                 vmw_ttm_unmap_from_dma(vmw_tt);
 455                 sg_free_table(vmw_tt->vsgt.sgt);
 456                 vmw_tt->vsgt.sgt = NULL;
 457                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 458                                     vmw_tt->sg_alloc_size);
 459                 break;
 460         default:
 461                 break;
 462         }
 463         vmw_tt->mapped = false;
 464 }
 465
 466 /**
 467  * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 468  * TTM buffer object
 469  *
 470  * @bo: Pointer to a struct ttm_buffer_object
 471  *
 472  * Returns a pointer to a struct vmw_sg_table object. The object should
 473  * not be freed after use.
 474  * Note that for the device addresses to be valid, the buffer object must
 475  * either be reserved or pinned.
 476  */
 477 const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
 478 {
 479         struct vmw_ttm_tt *vmw_tt =
 480                 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 481
 482         return &vmw_tt->vsgt;
 483 }
 484
 485
 486 static int vmw_ttm_bind(struct ttm_device *bdev,
 487                         struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 488 {
 489         struct vmw_ttm_tt *vmw_be =
 490                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 491         int ret = 0;
 492
 493         if (!bo_mem)
 494                 return -EINVAL;
 495
 496         if (vmw_be->bound)
 497                 return 0;
 498
 499         ret = vmw_ttm_map_dma(vmw_be);
 500         if (unlikely(ret != 0))
 501                 return ret;
 502
 503         vmw_be->gmr_id = bo_mem->start;
 504         vmw_be->mem_type = bo_mem->mem_type;
 505
 506         switch (bo_mem->mem_type) {
 507         case VMW_PL_GMR:
 508                 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 509                                     ttm->num_pages, vmw_be->gmr_id);
 510                 break;
 511         case VMW_PL_MOB:
 512                 if (unlikely(vmw_be->mob == NULL)) {
 513                         vmw_be->mob =
 514                                 vmw_mob_create(ttm->num_pages);
 515                         if (unlikely(vmw_be->mob == NULL))
 516                                 return -ENOMEM;
 517                 }
 518
 519                 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
 520                                     &vmw_be->vsgt, ttm->num_pages,
 521                                     vmw_be->gmr_id);
 522                 break;
 523         default:
 524                 BUG();
 525         }
 526         vmw_be->bound = true;
 527         return ret;
 528 }
 529
 530 static void vmw_ttm_unbind(struct ttm_device *bdev,
 531                            struct ttm_tt *ttm)
 532 {
 533         struct vmw_ttm_tt *vmw_be =
 534                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 535
 536         if (!vmw_be->bound)
 537                 return;
 538
 539         switch (vmw_be->mem_type) {
 540         case VMW_PL_GMR:
 541                 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 542                 break;
 543         case VMW_PL_MOB:
 544                 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
 545                 break;
 546         default:
 547                 BUG();
 548         }
 549
 550         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 551                 vmw_ttm_unmap_dma(vmw_be);
 552         vmw_be->bound = false;
 553 }
 554
 555
 556 static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 557 {
 558         struct vmw_ttm_tt *vmw_be =
 559                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 560
 561         vmw_ttm_unbind(bdev, ttm);
 562         ttm_tt_destroy_common(bdev, ttm);
 563         vmw_ttm_unmap_dma(vmw_be);
 564         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 565                 ttm_tt_fini(&vmw_be->dma_ttm);
 566         else
 567                 ttm_tt_fini(ttm);
 568
 569         if (vmw_be->mob)
 570                 vmw_mob_destroy(vmw_be->mob);
 571
 572         kfree(vmw_be);
 573 }
 574
 575
 576 static int vmw_ttm_populate(struct ttm_device *bdev,
 577                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 578 {
 579         /* TODO: maybe completely drop this ? */
 580         if (ttm_tt_is_populated(ttm))
 581                 return 0;
 582
 583         return ttm_pool_alloc(&bdev->pool, ttm, ctx);
 584 }
 585
 586 static void vmw_ttm_unpopulate(struct ttm_device *bdev,
 587                                struct ttm_tt *ttm)
 588 {
 589         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 590                                                  dma_ttm);
 591
 592         if (vmw_tt->mob) {
 593                 vmw_mob_destroy(vmw_tt->mob);
 594                 vmw_tt->mob = NULL;
 595         }
 596
 597         vmw_ttm_unmap_dma(vmw_tt);
 598         ttm_pool_free(&bdev->pool, ttm);
 599 }
 600
 601 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 602                                         uint32_t page_flags)
 603 {
 604         struct vmw_ttm_tt *vmw_be;
 605         int ret;
 606
 607         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 608         if (!vmw_be)
 609                 return NULL;
 610
 611         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 612         vmw_be->mob = NULL;
 613
 614         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 615                 ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 616                                      ttm_cached);
 617         else
 618                 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 619                                   ttm_cached);
 620         if (unlikely(ret != 0))
 621                 goto out_no_init;
 622
 623         return &vmw_be->dma_ttm;
 624 out_no_init:
 625         kfree(vmw_be);
 626         return NULL;
 627 }
 628
 629 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 630                      struct ttm_placement *placement)
 631 {
 632         *placement = vmw_sys_placement;
 633 }
 634
 635 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 636 {
 637         struct ttm_object_file *tfile =
 638                 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
 639
 640         return vmw_user_bo_verify_access(bo, tfile);
 641 }
 642
 643 static int vmw_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
 644 {
 645         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 646
 647         switch (mem->mem_type) {
 648         case TTM_PL_SYSTEM:
 649         case VMW_PL_GMR:
 650         case VMW_PL_MOB:
 651                 return 0;
 652         case TTM_PL_VRAM:
 653                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 654                         dev_priv->vram_start;
 655                 mem->bus.is_iomem = true;
 656                 mem->bus.caching = ttm_cached;
 657                 break;
 658         default:
 659                 return -EINVAL;
 660         }
 661         return 0;
 662 }
 663
 664 /**
 665  * vmw_move_notify - TTM move_notify_callback
 666  *
 667  * @bo: The TTM buffer object about to move.
 668  * @evict: Unused
 669  * @mem: The struct ttm_resource indicating to what memory
 670  *       region the move is taking place.
 671  *
 672  * Calls move_notify for all subsystems needing it.
 673  * (currently only resources).
 674  */
 675 static void vmw_move_notify(struct ttm_buffer_object *bo,
 676                             bool evict,
 677                             struct ttm_resource *mem)
 678 {
 679         if (!mem)
 680                 return;
 681         vmw_bo_move_notify(bo, mem);
 682         vmw_query_move_notify(bo, mem);
 683 }
 684
 685
 686 /**
 687  * vmw_swap_notify - TTM move_notify_callback
 688  *
 689  * @bo: The TTM buffer object about to be swapped out.
 690  */
 691 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 692 {
 693         vmw_bo_swap_notify(bo);
 694         (void) ttm_bo_wait(bo, false, false);
 695 }
 696
 697 static int vmw_move(struct ttm_buffer_object *bo,
 698                     bool evict,
 699                     struct ttm_operation_ctx *ctx,
 700                     struct ttm_resource *new_mem,
 701                     struct ttm_place *hop)
 702 {
 703         struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->mem.mem_type);
 704         struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
 705         int ret;
 706
 707         if (new_man->use_tt && new_mem->mem_type != TTM_PL_SYSTEM) {
 708                 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
 709                 if (ret)
 710                         return ret;
 711         }
 712
 713         vmw_move_notify(bo, evict, new_mem);
 714
 715         if (old_man->use_tt && new_man->use_tt) {
 716                 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
 717                         ttm_bo_assign_mem(bo, new_mem);
 718                         return 0;
 719                 }
 720                 ret = ttm_bo_wait_ctx(bo, ctx);
 721                 if (ret)
 722                         goto fail;
 723
 724                 vmw_ttm_unbind(bo->bdev, bo->ttm);
 725                 ttm_resource_free(bo, &bo->mem);
 726                 ttm_bo_assign_mem(bo, new_mem);
 727                 return 0;
 728         } else {
 729                 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 730                 if (ret)
 731                         goto fail;
 732         }
 733         return 0;
 734 fail:
 735         swap(*new_mem, bo->mem);
 736         vmw_move_notify(bo, false, new_mem);
 737         swap(*new_mem, bo->mem);
 738         return ret;
 739 }
 740
 741 static void
 742 vmw_delete_mem_notify(struct ttm_buffer_object *bo)
 743 {
 744         vmw_move_notify(bo, false, NULL);
 745 }
 746
 747 struct ttm_device_funcs vmw_bo_driver = {
 748         .ttm_tt_create = &vmw_ttm_tt_create,
 749         .ttm_tt_populate = &vmw_ttm_populate,
 750         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 751         .ttm_tt_destroy = &vmw_ttm_destroy,
 752         .eviction_valuable = ttm_bo_eviction_valuable,
 753         .evict_flags = vmw_evict_flags,
 754         .move = vmw_move,
 755         .verify_access = vmw_verify_access,
 756         .delete_mem_notify = vmw_delete_mem_notify,
 757         .swap_notify = vmw_swap_notify,
 758         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 759 };
 760
 761 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 762                                unsigned long bo_size,
 763                                struct ttm_buffer_object **bo_p)
 764 {
 765         struct ttm_operation_ctx ctx = {
 766                 .interruptible = false,
 767                 .no_wait_gpu = false
 768         };
 769         struct ttm_buffer_object *bo;
 770         int ret;
 771
 772         ret = vmw_bo_create_kernel(dev_priv, bo_size,
 773                                    &vmw_sys_placement,
 774                                    &bo);
 775         if (unlikely(ret != 0))
 776                 return ret;
 777
 778         ret = ttm_bo_reserve(bo, false, true, NULL);
 779         BUG_ON(ret != 0);
 780         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 781         if (likely(ret == 0)) {
 782                 struct vmw_ttm_tt *vmw_tt =
 783                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 784                 ret = vmw_ttm_map_dma(vmw_tt);
 785         }
 786
 787         ttm_bo_unreserve(bo);
 788
 789         if (likely(ret == 0))
 790                 *bo_p = bo;
 791         return ret;
 792 }