drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   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 #include <drm/ttm/ttm_page_alloc.h>
  32
  33 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
  34         TTM_PL_FLAG_CACHED;
  35
  36 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
  37         TTM_PL_FLAG_CACHED |
  38         TTM_PL_FLAG_NO_EVICT;
  39
  40 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
  41         TTM_PL_FLAG_CACHED;
  42
  43 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
  44         TTM_PL_FLAG_CACHED;
  45
  46 static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
  47         TTM_PL_FLAG_CACHED |
  48         TTM_PL_FLAG_NO_EVICT;
  49
  50 struct ttm_placement vmw_vram_placement = {
  51         .fpfn = 0,
  52         .lpfn = 0,
  53         .num_placement = 1,
  54         .placement = &vram_placement_flags,
  55         .num_busy_placement = 1,
  56         .busy_placement = &vram_placement_flags
  57 };
  58
  59 static uint32_t vram_gmr_placement_flags[] = {
  60         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
  61         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
  62 };
  63
  64 static uint32_t gmr_vram_placement_flags[] = {
  65         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
  66         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
  67 };
  68
  69 struct ttm_placement vmw_vram_gmr_placement = {
  70         .fpfn = 0,
  71         .lpfn = 0,
  72         .num_placement = 2,
  73         .placement = vram_gmr_placement_flags,
  74         .num_busy_placement = 1,
  75         .busy_placement = &gmr_placement_flags
  76 };
  77
  78 static uint32_t vram_gmr_ne_placement_flags[] = {
  79         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
  80         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  81 };
  82
  83 struct ttm_placement vmw_vram_gmr_ne_placement = {
  84         .fpfn = 0,
  85         .lpfn = 0,
  86         .num_placement = 2,
  87         .placement = vram_gmr_ne_placement_flags,
  88         .num_busy_placement = 1,
  89         .busy_placement = &gmr_ne_placement_flags
  90 };
  91
  92 struct ttm_placement vmw_vram_sys_placement = {
  93         .fpfn = 0,
  94         .lpfn = 0,
  95         .num_placement = 1,
  96         .placement = &vram_placement_flags,
  97         .num_busy_placement = 1,
  98         .busy_placement = &sys_placement_flags
  99 };
 100
 101 struct ttm_placement vmw_vram_ne_placement = {
 102         .fpfn = 0,
 103         .lpfn = 0,
 104         .num_placement = 1,
 105         .placement = &vram_ne_placement_flags,
 106         .num_busy_placement = 1,
 107         .busy_placement = &vram_ne_placement_flags
 108 };
 109
 110 struct ttm_placement vmw_sys_placement = {
 111         .fpfn = 0,
 112         .lpfn = 0,
 113         .num_placement = 1,
 114         .placement = &sys_placement_flags,
 115         .num_busy_placement = 1,
 116         .busy_placement = &sys_placement_flags
 117 };
 118
 119 static uint32_t evictable_placement_flags[] = {
 120         TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
 121         TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 122         VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 123 };
 124
 125 struct ttm_placement vmw_evictable_placement = {
 126         .fpfn = 0,
 127         .lpfn = 0,
 128         .num_placement = 3,
 129         .placement = evictable_placement_flags,
 130         .num_busy_placement = 1,
 131         .busy_placement = &sys_placement_flags
 132 };
 133
 134 struct ttm_placement vmw_srf_placement = {
 135         .fpfn = 0,
 136         .lpfn = 0,
 137         .num_placement = 1,
 138         .num_busy_placement = 2,
 139         .placement = &gmr_placement_flags,
 140         .busy_placement = gmr_vram_placement_flags
 141 };
 142
 143 struct vmw_ttm_tt {
 144         struct ttm_dma_tt dma_ttm;
 145         struct vmw_private *dev_priv;
 146         int gmr_id;
 147         struct sg_table sgt;
 148         struct vmw_sg_table vsgt;
 149         uint64_t sg_alloc_size;
 150         bool mapped;
 151 };
 152
 153 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 154
 155 /**
 156  * Helper functions to advance a struct vmw_piter iterator.
 157  *
 158  * @viter: Pointer to the iterator.
 159  *
 160  * These functions return false if past the end of the list,
 161  * true otherwise. Functions are selected depending on the current
 162  * DMA mapping mode.
 163  */
 164 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 165 {
 166         return ++(viter->i) < viter->num_pages;
 167 }
 168
 169 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 170 {
 171         return __sg_page_iter_next(&viter->iter);
 172 }
 173
 174
 175 /**
 176  * Helper functions to return a pointer to the current page.
 177  *
 178  * @viter: Pointer to the iterator
 179  *
 180  * These functions return a pointer to the page currently
 181  * pointed to by @viter. Functions are selected depending on the
 182  * current mapping mode.
 183  */
 184 static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
 185 {
 186         return viter->pages[viter->i];
 187 }
 188
 189 static struct page *__vmw_piter_sg_page(struct vmw_piter *viter)
 190 {
 191         return sg_page_iter_page(&viter->iter);
 192 }
 193
 194
 195 /**
 196  * Helper functions to return the DMA address of the current page.
 197  *
 198  * @viter: Pointer to the iterator
 199  *
 200  * These functions return the DMA address of the page currently
 201  * pointed to by @viter. Functions are selected depending on the
 202  * current mapping mode.
 203  */
 204 static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
 205 {
 206         return page_to_phys(viter->pages[viter->i]);
 207 }
 208
 209 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 210 {
 211         return viter->addrs[viter->i];
 212 }
 213
 214 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 215 {
 216         return sg_page_iter_dma_address(&viter->iter);
 217 }
 218
 219
 220 /**
 221  * vmw_piter_start - Initialize a struct vmw_piter.
 222  *
 223  * @viter: Pointer to the iterator to initialize
 224  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 225  *
 226  * Note that we're following the convention of __sg_page_iter_start, so that
 227  * the iterator doesn't point to a valid page after initialization; it has
 228  * to be advanced one step first.
 229  */
 230 void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
 231                      unsigned long p_offset)
 232 {
 233         viter->i = p_offset - 1;
 234         viter->num_pages = vsgt->num_pages;
 235         switch (vsgt->mode) {
 236         case vmw_dma_phys:
 237                 viter->next = &__vmw_piter_non_sg_next;
 238                 viter->dma_address = &__vmw_piter_phys_addr;
 239                 viter->page = &__vmw_piter_non_sg_page;
 240                 viter->pages = vsgt->pages;
 241                 break;
 242         case vmw_dma_alloc_coherent:
 243                 viter->next = &__vmw_piter_non_sg_next;
 244                 viter->dma_address = &__vmw_piter_dma_addr;
 245                 viter->page = &__vmw_piter_non_sg_page;
 246                 viter->addrs = vsgt->addrs;
 247                 break;
 248         case vmw_dma_map_populate:
 249         case vmw_dma_map_bind:
 250                 viter->next = &__vmw_piter_sg_next;
 251                 viter->dma_address = &__vmw_piter_sg_addr;
 252                 viter->page = &__vmw_piter_sg_page;
 253                 __sg_page_iter_start(&viter->iter, vsgt->sgt->sgl,
 254                                      vsgt->sgt->orig_nents, p_offset);
 255                 break;
 256         default:
 257                 BUG();
 258         }
 259 }
 260
 261 /**
 262  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 263  * TTM pages
 264  *
 265  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 266  *
 267  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 268  */
 269 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 270 {
 271         struct device *dev = vmw_tt->dev_priv->dev->dev;
 272
 273         dma_unmap_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.nents,
 274                 DMA_BIDIRECTIONAL);
 275         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 276 }
 277
 278 /**
 279  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 280  *
 281  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 282  *
 283  * This function is used to get device addresses from the kernel DMA layer.
 284  * However, it's violating the DMA API in that when this operation has been
 285  * performed, it's illegal for the CPU to write to the pages without first
 286  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 287  * therefore only legal to call this function if we know that the function
 288  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 289  * a CPU write buffer flush.
 290  */
 291 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 292 {
 293         struct device *dev = vmw_tt->dev_priv->dev->dev;
 294         int ret;
 295
 296         ret = dma_map_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.orig_nents,
 297                          DMA_BIDIRECTIONAL);
 298         if (unlikely(ret == 0))
 299                 return -ENOMEM;
 300
 301         vmw_tt->sgt.nents = ret;
 302
 303         return 0;
 304 }
 305
 306 /**
 307  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 308  *
 309  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 310  *
 311  * Select the correct function for and make sure the TTM pages are
 312  * visible to the device. Allocate storage for the device mappings.
 313  * If a mapping has already been performed, indicated by the storage
 314  * pointer being non NULL, the function returns success.
 315  */
 316 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 317 {
 318         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 319         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 320         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 321         struct vmw_piter iter;
 322         dma_addr_t old;
 323         int ret = 0;
 324         static size_t sgl_size;
 325         static size_t sgt_size;
 326
 327         if (vmw_tt->mapped)
 328                 return 0;
 329
 330         vsgt->mode = dev_priv->map_mode;
 331         vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
 332         vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
 333         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 334         vsgt->sgt = &vmw_tt->sgt;
 335
 336         switch (dev_priv->map_mode) {
 337         case vmw_dma_map_bind:
 338         case vmw_dma_map_populate:
 339                 if (unlikely(!sgl_size)) {
 340                         sgl_size = ttm_round_pot(sizeof(struct scatterlist));
 341                         sgt_size = ttm_round_pot(sizeof(struct sg_table));
 342                 }
 343                 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
 344                 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, false,
 345                                            true);
 346                 if (unlikely(ret != 0))
 347                         return ret;
 348
 349                 ret = sg_alloc_table_from_pages(&vmw_tt->sgt, vsgt->pages,
 350                                                 vsgt->num_pages, 0,
 351                                                 (unsigned long)
 352                                                 vsgt->num_pages << PAGE_SHIFT,
 353                                                 GFP_KERNEL);
 354                 if (unlikely(ret != 0))
 355                         goto out_sg_alloc_fail;
 356
 357                 if (vsgt->num_pages > vmw_tt->sgt.nents) {
 358                         uint64_t over_alloc =
 359                                 sgl_size * (vsgt->num_pages -
 360                                             vmw_tt->sgt.nents);
 361
 362                         ttm_mem_global_free(glob, over_alloc);
 363                         vmw_tt->sg_alloc_size -= over_alloc;
 364                 }
 365
 366                 ret = vmw_ttm_map_for_dma(vmw_tt);
 367                 if (unlikely(ret != 0))
 368                         goto out_map_fail;
 369
 370                 break;
 371         default:
 372                 break;
 373         }
 374
 375         old = ~((dma_addr_t) 0);
 376         vmw_tt->vsgt.num_regions = 0;
 377         for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
 378                 dma_addr_t cur = vmw_piter_dma_addr(&iter);
 379
 380                 if (cur != old + PAGE_SIZE)
 381                         vmw_tt->vsgt.num_regions++;
 382                 old = cur;
 383         }
 384
 385         vmw_tt->mapped = true;
 386         return 0;
 387
 388 out_map_fail:
 389         sg_free_table(vmw_tt->vsgt.sgt);
 390         vmw_tt->vsgt.sgt = NULL;
 391 out_sg_alloc_fail:
 392         ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
 393         return ret;
 394 }
 395
 396 /**
 397  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 398  *
 399  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 400  *
 401  * Tear down any previously set up device DMA mappings and free
 402  * any storage space allocated for them. If there are no mappings set up,
 403  * this function is a NOP.
 404  */
 405 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 406 {
 407         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 408
 409         if (!vmw_tt->vsgt.sgt)
 410                 return;
 411
 412         switch (dev_priv->map_mode) {
 413         case vmw_dma_map_bind:
 414         case vmw_dma_map_populate:
 415                 vmw_ttm_unmap_from_dma(vmw_tt);
 416                 sg_free_table(vmw_tt->vsgt.sgt);
 417                 vmw_tt->vsgt.sgt = NULL;
 418                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 419                                     vmw_tt->sg_alloc_size);
 420                 break;
 421         default:
 422                 break;
 423         }
 424         vmw_tt->mapped = false;
 425 }
 426
 427 static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 428 {
 429         struct vmw_ttm_tt *vmw_be =
 430                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 431         int ret;
 432
 433         ret = vmw_ttm_map_dma(vmw_be);
 434         if (unlikely(ret != 0))
 435                 return ret;
 436
 437         vmw_be->gmr_id = bo_mem->start;
 438
 439         return vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 440                             ttm->num_pages, vmw_be->gmr_id);
 441 }
 442
 443 static int vmw_ttm_unbind(struct ttm_tt *ttm)
 444 {
 445         struct vmw_ttm_tt *vmw_be =
 446                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 447
 448         vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 449
 450         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 451                 vmw_ttm_unmap_dma(vmw_be);
 452
 453         return 0;
 454 }
 455
 456 static void vmw_ttm_destroy(struct ttm_tt *ttm)
 457 {
 458         struct vmw_ttm_tt *vmw_be =
 459                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 460
 461         vmw_ttm_unmap_dma(vmw_be);
 462         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 463                 ttm_dma_tt_fini(&vmw_be->dma_ttm);
 464         else
 465                 ttm_tt_fini(ttm);
 466         kfree(vmw_be);
 467 }
 468
 469 static int vmw_ttm_populate(struct ttm_tt *ttm)
 470 {
 471         struct vmw_ttm_tt *vmw_tt =
 472                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 473         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 474         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 475         int ret;
 476
 477         if (ttm->state != tt_unpopulated)
 478                 return 0;
 479
 480         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 481                 size_t size =
 482                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 483                 ret = ttm_mem_global_alloc(glob, size, false, true);
 484                 if (unlikely(ret != 0))
 485                         return ret;
 486
 487                 ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
 488                 if (unlikely(ret != 0))
 489                         ttm_mem_global_free(glob, size);
 490         } else
 491                 ret = ttm_pool_populate(ttm);
 492
 493         return ret;
 494 }
 495
 496 static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
 497 {
 498         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 499                                                  dma_ttm.ttm);
 500         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 501         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 502
 503         vmw_ttm_unmap_dma(vmw_tt);
 504         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 505                 size_t size =
 506                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 507
 508                 ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
 509                 ttm_mem_global_free(glob, size);
 510         } else
 511                 ttm_pool_unpopulate(ttm);
 512 }
 513
 514 static struct ttm_backend_func vmw_ttm_func = {
 515         .bind = vmw_ttm_bind,
 516         .unbind = vmw_ttm_unbind,
 517         .destroy = vmw_ttm_destroy,
 518 };
 519
 520 struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
 521                                  unsigned long size, uint32_t page_flags,
 522                                  struct page *dummy_read_page)
 523 {
 524         struct vmw_ttm_tt *vmw_be;
 525         int ret;
 526
 527         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 528         if (!vmw_be)
 529                 return NULL;
 530
 531         vmw_be->dma_ttm.ttm.func = &vmw_ttm_func;
 532         vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
 533
 534         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 535                 ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bdev, size, page_flags,
 536                                       dummy_read_page);
 537         else
 538                 ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bdev, size, page_flags,
 539                                   dummy_read_page);
 540         if (unlikely(ret != 0))
 541                 goto out_no_init;
 542
 543         return &vmw_be->dma_ttm.ttm;
 544 out_no_init:
 545         kfree(vmw_be);
 546         return NULL;
 547 }
 548
 549 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 550 {
 551         return 0;
 552 }
 553
 554 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 555                       struct ttm_mem_type_manager *man)
 556 {
 557         switch (type) {
 558         case TTM_PL_SYSTEM:
 559                 /* System memory */
 560
 561                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 562                 man->available_caching = TTM_PL_FLAG_CACHED;
 563                 man->default_caching = TTM_PL_FLAG_CACHED;
 564                 break;
 565         case TTM_PL_VRAM:
 566                 /* "On-card" video ram */
 567                 man->func = &ttm_bo_manager_func;
 568                 man->gpu_offset = 0;
 569                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
 570                 man->available_caching = TTM_PL_FLAG_CACHED;
 571                 man->default_caching = TTM_PL_FLAG_CACHED;
 572                 break;
 573         case VMW_PL_GMR:
 574                 /*
 575                  * "Guest Memory Regions" is an aperture like feature with
 576                  *  one slot per bo. There is an upper limit of the number of
 577                  *  slots as well as the bo size.
 578                  */
 579                 man->func = &vmw_gmrid_manager_func;
 580                 man->gpu_offset = 0;
 581                 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
 582                 man->available_caching = TTM_PL_FLAG_CACHED;
 583                 man->default_caching = TTM_PL_FLAG_CACHED;
 584                 break;
 585         default:
 586                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 587                 return -EINVAL;
 588         }
 589         return 0;
 590 }
 591
 592 void vmw_evict_flags(struct ttm_buffer_object *bo,
 593                      struct ttm_placement *placement)
 594 {
 595         *placement = vmw_sys_placement;
 596 }
 597
 598 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 599 {
 600         struct ttm_object_file *tfile =
 601                 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
 602
 603         return vmw_user_dmabuf_verify_access(bo, tfile);
 604 }
 605
 606 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 607 {
 608         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 609         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 610
 611         mem->bus.addr = NULL;
 612         mem->bus.is_iomem = false;
 613         mem->bus.offset = 0;
 614         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 615         mem->bus.base = 0;
 616         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 617                 return -EINVAL;
 618         switch (mem->mem_type) {
 619         case TTM_PL_SYSTEM:
 620         case VMW_PL_GMR:
 621                 return 0;
 622         case TTM_PL_VRAM:
 623                 mem->bus.offset = mem->start << PAGE_SHIFT;
 624                 mem->bus.base = dev_priv->vram_start;
 625                 mem->bus.is_iomem = true;
 626                 break;
 627         default:
 628                 return -EINVAL;
 629         }
 630         return 0;
 631 }
 632
 633 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 634 {
 635 }
 636
 637 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 638 {
 639         return 0;
 640 }
 641
 642 /**
 643  * FIXME: We're using the old vmware polling method to sync.
 644  * Do this with fences instead.
 645  */
 646
 647 static void *vmw_sync_obj_ref(void *sync_obj)
 648 {
 649
 650         return (void *)
 651                 vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
 652 }
 653
 654 static void vmw_sync_obj_unref(void **sync_obj)
 655 {
 656         vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
 657 }
 658
 659 static int vmw_sync_obj_flush(void *sync_obj)
 660 {
 661         vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
 662         return 0;
 663 }
 664
 665 static bool vmw_sync_obj_signaled(void *sync_obj)
 666 {
 667         return  vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
 668                                        DRM_VMW_FENCE_FLAG_EXEC);
 669
 670 }
 671
 672 static int vmw_sync_obj_wait(void *sync_obj, bool lazy, bool interruptible)
 673 {
 674         return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
 675                                   DRM_VMW_FENCE_FLAG_EXEC,
 676                                   lazy, interruptible,
 677                                   VMW_FENCE_WAIT_TIMEOUT);
 678 }
 679
 680 struct ttm_bo_driver vmw_bo_driver = {
 681         .ttm_tt_create = &vmw_ttm_tt_create,
 682         .ttm_tt_populate = &vmw_ttm_populate,
 683         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 684         .invalidate_caches = vmw_invalidate_caches,
 685         .init_mem_type = vmw_init_mem_type,
 686         .evict_flags = vmw_evict_flags,
 687         .move = NULL,
 688         .verify_access = vmw_verify_access,
 689         .sync_obj_signaled = vmw_sync_obj_signaled,
 690         .sync_obj_wait = vmw_sync_obj_wait,
 691         .sync_obj_flush = vmw_sync_obj_flush,
 692         .sync_obj_unref = vmw_sync_obj_unref,
 693         .sync_obj_ref = vmw_sync_obj_ref,
 694         .move_notify = NULL,
 695         .swap_notify = NULL,
 696         .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
 697         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 698         .io_mem_free = &vmw_ttm_io_mem_free,
 699 };