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 #include <drm/ttm/ttm_page_alloc.h>
  32
  33 static const struct ttm_place vram_placement_flags = {
  34         .fpfn = 0,
  35         .lpfn = 0,
  36         .mem_type = TTM_PL_VRAM,
  37         .flags = TTM_PL_FLAG_CACHED
  38 };
  39
  40 static const struct ttm_place vram_ne_placement_flags = {
  41         .fpfn = 0,
  42         .lpfn = 0,
  43         .mem_type = TTM_PL_VRAM,
  44         .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  45 };
  46
  47 static const struct ttm_place sys_placement_flags = {
  48         .fpfn = 0,
  49         .lpfn = 0,
  50         .mem_type = TTM_PL_SYSTEM,
  51         .flags = TTM_PL_FLAG_CACHED
  52 };
  53
  54 static const struct ttm_place sys_ne_placement_flags = {
  55         .fpfn = 0,
  56         .lpfn = 0,
  57         .mem_type = TTM_PL_SYSTEM,
  58         .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  59 };
  60
  61 static const struct ttm_place gmr_placement_flags = {
  62         .fpfn = 0,
  63         .lpfn = 0,
  64         .mem_type = VMW_PL_GMR,
  65         .flags = TTM_PL_FLAG_CACHED
  66 };
  67
  68 static const struct ttm_place gmr_ne_placement_flags = {
  69         .fpfn = 0,
  70         .lpfn = 0,
  71         .mem_type = VMW_PL_GMR,
  72         .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  73 };
  74
  75 static const struct ttm_place mob_placement_flags = {
  76         .fpfn = 0,
  77         .lpfn = 0,
  78         .mem_type = VMW_PL_MOB,
  79         .flags = TTM_PL_FLAG_CACHED
  80 };
  81
  82 static const struct ttm_place mob_ne_placement_flags = {
  83         .fpfn = 0,
  84         .lpfn = 0,
  85         .mem_type = VMW_PL_MOB,
  86         .flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
  87 };
  88
  89 struct ttm_placement vmw_vram_placement = {
  90         .num_placement = 1,
  91         .placement = &vram_placement_flags,
  92         .num_busy_placement = 1,
  93         .busy_placement = &vram_placement_flags
  94 };
  95
  96 static const struct ttm_place vram_gmr_placement_flags[] = {
  97         {
  98                 .fpfn = 0,
  99                 .lpfn = 0,
 100                 .mem_type = TTM_PL_VRAM,
 101                 .flags = TTM_PL_FLAG_CACHED
 102         }, {
 103                 .fpfn = 0,
 104                 .lpfn = 0,
 105                 .mem_type = VMW_PL_GMR,
 106                 .flags = TTM_PL_FLAG_CACHED
 107         }
 108 };
 109
 110 static const struct ttm_place gmr_vram_placement_flags[] = {
 111         {
 112                 .fpfn = 0,
 113                 .lpfn = 0,
 114                 .mem_type = VMW_PL_GMR,
 115                 .flags = TTM_PL_FLAG_CACHED
 116         }, {
 117                 .fpfn = 0,
 118                 .lpfn = 0,
 119                 .mem_type = TTM_PL_VRAM,
 120                 .flags = TTM_PL_FLAG_CACHED
 121         }
 122 };
 123
 124 struct ttm_placement vmw_vram_gmr_placement = {
 125         .num_placement = 2,
 126         .placement = vram_gmr_placement_flags,
 127         .num_busy_placement = 1,
 128         .busy_placement = &gmr_placement_flags
 129 };
 130
 131 static const struct ttm_place vram_gmr_ne_placement_flags[] = {
 132         {
 133                 .fpfn = 0,
 134                 .lpfn = 0,
 135                 .mem_type = TTM_PL_VRAM,
 136                 .flags = TTM_PL_FLAG_CACHED |
 137                          TTM_PL_FLAG_NO_EVICT
 138         }, {
 139                 .fpfn = 0,
 140                 .lpfn = 0,
 141                 .mem_type = VMW_PL_GMR,
 142                 .flags = TTM_PL_FLAG_CACHED |
 143                          TTM_PL_FLAG_NO_EVICT
 144         }
 145 };
 146
 147 struct ttm_placement vmw_vram_gmr_ne_placement = {
 148         .num_placement = 2,
 149         .placement = vram_gmr_ne_placement_flags,
 150         .num_busy_placement = 1,
 151         .busy_placement = &gmr_ne_placement_flags
 152 };
 153
 154 struct ttm_placement vmw_vram_sys_placement = {
 155         .num_placement = 1,
 156         .placement = &vram_placement_flags,
 157         .num_busy_placement = 1,
 158         .busy_placement = &sys_placement_flags
 159 };
 160
 161 struct ttm_placement vmw_vram_ne_placement = {
 162         .num_placement = 1,
 163         .placement = &vram_ne_placement_flags,
 164         .num_busy_placement = 1,
 165         .busy_placement = &vram_ne_placement_flags
 166 };
 167
 168 struct ttm_placement vmw_sys_placement = {
 169         .num_placement = 1,
 170         .placement = &sys_placement_flags,
 171         .num_busy_placement = 1,
 172         .busy_placement = &sys_placement_flags
 173 };
 174
 175 struct ttm_placement vmw_sys_ne_placement = {
 176         .num_placement = 1,
 177         .placement = &sys_ne_placement_flags,
 178         .num_busy_placement = 1,
 179         .busy_placement = &sys_ne_placement_flags
 180 };
 181
 182 static const struct ttm_place evictable_placement_flags[] = {
 183         {
 184                 .fpfn = 0,
 185                 .lpfn = 0,
 186                 .mem_type = TTM_PL_SYSTEM,
 187                 .flags = TTM_PL_FLAG_CACHED
 188         }, {
 189                 .fpfn = 0,
 190                 .lpfn = 0,
 191                 .mem_type = TTM_PL_VRAM,
 192                 .flags = TTM_PL_FLAG_CACHED
 193         }, {
 194                 .fpfn = 0,
 195                 .lpfn = 0,
 196                 .mem_type = VMW_PL_GMR,
 197                 .flags = TTM_PL_FLAG_CACHED
 198         }, {
 199                 .fpfn = 0,
 200                 .lpfn = 0,
 201                 .mem_type = VMW_PL_MOB,
 202                 .flags = TTM_PL_FLAG_CACHED
 203         }
 204 };
 205
 206 static const struct ttm_place nonfixed_placement_flags[] = {
 207         {
 208                 .fpfn = 0,
 209                 .lpfn = 0,
 210                 .mem_type = TTM_PL_SYSTEM,
 211                 .flags = TTM_PL_FLAG_CACHED
 212         }, {
 213                 .fpfn = 0,
 214                 .lpfn = 0,
 215                 .mem_type = VMW_PL_GMR,
 216                 .flags = TTM_PL_FLAG_CACHED
 217         }, {
 218                 .fpfn = 0,
 219                 .lpfn = 0,
 220                 .mem_type = VMW_PL_MOB,
 221                 .flags = TTM_PL_FLAG_CACHED
 222         }
 223 };
 224
 225 struct ttm_placement vmw_evictable_placement = {
 226         .num_placement = 4,
 227         .placement = evictable_placement_flags,
 228         .num_busy_placement = 1,
 229         .busy_placement = &sys_placement_flags
 230 };
 231
 232 struct ttm_placement vmw_srf_placement = {
 233         .num_placement = 1,
 234         .num_busy_placement = 2,
 235         .placement = &gmr_placement_flags,
 236         .busy_placement = gmr_vram_placement_flags
 237 };
 238
 239 struct ttm_placement vmw_mob_placement = {
 240         .num_placement = 1,
 241         .num_busy_placement = 1,
 242         .placement = &mob_placement_flags,
 243         .busy_placement = &mob_placement_flags
 244 };
 245
 246 struct ttm_placement vmw_mob_ne_placement = {
 247         .num_placement = 1,
 248         .num_busy_placement = 1,
 249         .placement = &mob_ne_placement_flags,
 250         .busy_placement = &mob_ne_placement_flags
 251 };
 252
 253 struct ttm_placement vmw_nonfixed_placement = {
 254         .num_placement = 3,
 255         .placement = nonfixed_placement_flags,
 256         .num_busy_placement = 1,
 257         .busy_placement = &sys_placement_flags
 258 };
 259
 260 struct vmw_ttm_tt {
 261         struct ttm_dma_tt dma_ttm;
 262         struct vmw_private *dev_priv;
 263         int gmr_id;
 264         struct vmw_mob *mob;
 265         int mem_type;
 266         struct sg_table sgt;
 267         struct vmw_sg_table vsgt;
 268         uint64_t sg_alloc_size;
 269         bool mapped;
 270         bool bound;
 271 };
 272
 273 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 274
 275 /**
 276  * Helper functions to advance a struct vmw_piter iterator.
 277  *
 278  * @viter: Pointer to the iterator.
 279  *
 280  * These functions return false if past the end of the list,
 281  * true otherwise. Functions are selected depending on the current
 282  * DMA mapping mode.
 283  */
 284 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 285 {
 286         return ++(viter->i) < viter->num_pages;
 287 }
 288
 289 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 290 {
 291         bool ret = __vmw_piter_non_sg_next(viter);
 292
 293         return __sg_page_iter_dma_next(&viter->iter) && ret;
 294 }
 295
 296
 297 /**
 298  * Helper functions to return a pointer to the current page.
 299  *
 300  * @viter: Pointer to the iterator
 301  *
 302  * These functions return a pointer to the page currently
 303  * pointed to by @viter. Functions are selected depending on the
 304  * current mapping mode.
 305  */
 306 static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
 307 {
 308         return viter->pages[viter->i];
 309 }
 310
 311 /**
 312  * Helper functions to return the DMA address of the current page.
 313  *
 314  * @viter: Pointer to the iterator
 315  *
 316  * These functions return the DMA address of the page currently
 317  * pointed to by @viter. Functions are selected depending on the
 318  * current mapping mode.
 319  */
 320 static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
 321 {
 322         return page_to_phys(viter->pages[viter->i]);
 323 }
 324
 325 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 326 {
 327         return viter->addrs[viter->i];
 328 }
 329
 330 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 331 {
 332         return sg_page_iter_dma_address(&viter->iter);
 333 }
 334
 335
 336 /**
 337  * vmw_piter_start - Initialize a struct vmw_piter.
 338  *
 339  * @viter: Pointer to the iterator to initialize
 340  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 341  *
 342  * Note that we're following the convention of __sg_page_iter_start, so that
 343  * the iterator doesn't point to a valid page after initialization; it has
 344  * to be advanced one step first.
 345  */
 346 void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
 347                      unsigned long p_offset)
 348 {
 349         viter->i = p_offset - 1;
 350         viter->num_pages = vsgt->num_pages;
 351         viter->page = &__vmw_piter_non_sg_page;
 352         viter->pages = vsgt->pages;
 353         switch (vsgt->mode) {
 354         case vmw_dma_phys:
 355                 viter->next = &__vmw_piter_non_sg_next;
 356                 viter->dma_address = &__vmw_piter_phys_addr;
 357                 break;
 358         case vmw_dma_alloc_coherent:
 359                 viter->next = &__vmw_piter_non_sg_next;
 360                 viter->dma_address = &__vmw_piter_dma_addr;
 361                 viter->addrs = vsgt->addrs;
 362                 break;
 363         case vmw_dma_map_populate:
 364         case vmw_dma_map_bind:
 365                 viter->next = &__vmw_piter_sg_next;
 366                 viter->dma_address = &__vmw_piter_sg_addr;
 367                 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
 368                                      vsgt->sgt->orig_nents, p_offset);
 369                 break;
 370         default:
 371                 BUG();
 372         }
 373 }
 374
 375 /**
 376  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 377  * TTM pages
 378  *
 379  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 380  *
 381  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 382  */
 383 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 384 {
 385         struct device *dev = vmw_tt->dev_priv->dev->dev;
 386
 387         dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 388         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 389 }
 390
 391 /**
 392  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 393  *
 394  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 395  *
 396  * This function is used to get device addresses from the kernel DMA layer.
 397  * However, it's violating the DMA API in that when this operation has been
 398  * performed, it's illegal for the CPU to write to the pages without first
 399  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 400  * therefore only legal to call this function if we know that the function
 401  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 402  * a CPU write buffer flush.
 403  */
 404 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 405 {
 406         struct device *dev = vmw_tt->dev_priv->dev->dev;
 407
 408         return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 409 }
 410
 411 /**
 412  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 413  *
 414  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 415  *
 416  * Select the correct function for and make sure the TTM pages are
 417  * visible to the device. Allocate storage for the device mappings.
 418  * If a mapping has already been performed, indicated by the storage
 419  * pointer being non NULL, the function returns success.
 420  */
 421 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 422 {
 423         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 424         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 425         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 426         struct ttm_operation_ctx ctx = {
 427                 .interruptible = true,
 428                 .no_wait_gpu = false
 429         };
 430         struct vmw_piter iter;
 431         dma_addr_t old;
 432         int ret = 0;
 433         static size_t sgl_size;
 434         static size_t sgt_size;
 435
 436         if (vmw_tt->mapped)
 437                 return 0;
 438
 439         vsgt->mode = dev_priv->map_mode;
 440         vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
 441         vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
 442         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 443         vsgt->sgt = &vmw_tt->sgt;
 444
 445         switch (dev_priv->map_mode) {
 446         case vmw_dma_map_bind:
 447         case vmw_dma_map_populate:
 448                 if (unlikely(!sgl_size)) {
 449                         sgl_size = ttm_round_pot(sizeof(struct scatterlist));
 450                         sgt_size = ttm_round_pot(sizeof(struct sg_table));
 451                 }
 452                 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
 453                 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
 454                 if (unlikely(ret != 0))
 455                         return ret;
 456
 457                 ret = __sg_alloc_table_from_pages
 458                         (&vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
 459                          (unsigned long) vsgt->num_pages << PAGE_SHIFT,
 460                          dma_get_max_seg_size(dev_priv->dev->dev),
 461                          GFP_KERNEL);
 462                 if (unlikely(ret != 0))
 463                         goto out_sg_alloc_fail;
 464
 465                 if (vsgt->num_pages > vmw_tt->sgt.orig_nents) {
 466                         uint64_t over_alloc =
 467                                 sgl_size * (vsgt->num_pages -
 468                                             vmw_tt->sgt.orig_nents);
 469
 470                         ttm_mem_global_free(glob, over_alloc);
 471                         vmw_tt->sg_alloc_size -= over_alloc;
 472                 }
 473
 474                 ret = vmw_ttm_map_for_dma(vmw_tt);
 475                 if (unlikely(ret != 0))
 476                         goto out_map_fail;
 477
 478                 break;
 479         default:
 480                 break;
 481         }
 482
 483         old = ~((dma_addr_t) 0);
 484         vmw_tt->vsgt.num_regions = 0;
 485         for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
 486                 dma_addr_t cur = vmw_piter_dma_addr(&iter);
 487
 488                 if (cur != old + PAGE_SIZE)
 489                         vmw_tt->vsgt.num_regions++;
 490                 old = cur;
 491         }
 492
 493         vmw_tt->mapped = true;
 494         return 0;
 495
 496 out_map_fail:
 497         sg_free_table(vmw_tt->vsgt.sgt);
 498         vmw_tt->vsgt.sgt = NULL;
 499 out_sg_alloc_fail:
 500         ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
 501         return ret;
 502 }
 503
 504 /**
 505  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 506  *
 507  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 508  *
 509  * Tear down any previously set up device DMA mappings and free
 510  * any storage space allocated for them. If there are no mappings set up,
 511  * this function is a NOP.
 512  */
 513 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 514 {
 515         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 516
 517         if (!vmw_tt->vsgt.sgt)
 518                 return;
 519
 520         switch (dev_priv->map_mode) {
 521         case vmw_dma_map_bind:
 522         case vmw_dma_map_populate:
 523                 vmw_ttm_unmap_from_dma(vmw_tt);
 524                 sg_free_table(vmw_tt->vsgt.sgt);
 525                 vmw_tt->vsgt.sgt = NULL;
 526                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 527                                     vmw_tt->sg_alloc_size);
 528                 break;
 529         default:
 530                 break;
 531         }
 532         vmw_tt->mapped = false;
 533 }
 534
 535 /**
 536  * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 537  * TTM buffer object
 538  *
 539  * @bo: Pointer to a struct ttm_buffer_object
 540  *
 541  * Returns a pointer to a struct vmw_sg_table object. The object should
 542  * not be freed after use.
 543  * Note that for the device addresses to be valid, the buffer object must
 544  * either be reserved or pinned.
 545  */
 546 const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
 547 {
 548         struct vmw_ttm_tt *vmw_tt =
 549                 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 550
 551         return &vmw_tt->vsgt;
 552 }
 553
 554
 555 static int vmw_ttm_bind(struct ttm_bo_device *bdev,
 556                         struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 557 {
 558         struct vmw_ttm_tt *vmw_be =
 559                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 560         int ret = 0;
 561
 562         if (!bo_mem)
 563                 return -EINVAL;
 564
 565         if (vmw_be->bound)
 566                 return 0;
 567
 568         ret = vmw_ttm_map_dma(vmw_be);
 569         if (unlikely(ret != 0))
 570                 return ret;
 571
 572         vmw_be->gmr_id = bo_mem->start;
 573         vmw_be->mem_type = bo_mem->mem_type;
 574
 575         switch (bo_mem->mem_type) {
 576         case VMW_PL_GMR:
 577                 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 578                                     ttm->num_pages, vmw_be->gmr_id);
 579                 break;
 580         case VMW_PL_MOB:
 581                 if (unlikely(vmw_be->mob == NULL)) {
 582                         vmw_be->mob =
 583                                 vmw_mob_create(ttm->num_pages);
 584                         if (unlikely(vmw_be->mob == NULL))
 585                                 return -ENOMEM;
 586                 }
 587
 588                 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
 589                                     &vmw_be->vsgt, ttm->num_pages,
 590                                     vmw_be->gmr_id);
 591                 break;
 592         default:
 593                 BUG();
 594         }
 595         vmw_be->bound = true;
 596         return ret;
 597 }
 598
 599 static void vmw_ttm_unbind(struct ttm_bo_device *bdev,
 600                            struct ttm_tt *ttm)
 601 {
 602         struct vmw_ttm_tt *vmw_be =
 603                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 604
 605         if (!vmw_be->bound)
 606                 return;
 607
 608         switch (vmw_be->mem_type) {
 609         case VMW_PL_GMR:
 610                 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 611                 break;
 612         case VMW_PL_MOB:
 613                 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
 614                 break;
 615         default:
 616                 BUG();
 617         }
 618
 619         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 620                 vmw_ttm_unmap_dma(vmw_be);
 621         vmw_be->bound = false;
 622 }
 623
 624
 625 static void vmw_ttm_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
 626 {
 627         struct vmw_ttm_tt *vmw_be =
 628                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 629
 630         vmw_ttm_unbind(bdev, ttm);
 631         ttm_tt_destroy_common(bdev, ttm);
 632         vmw_ttm_unmap_dma(vmw_be);
 633         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 634                 ttm_dma_tt_fini(&vmw_be->dma_ttm);
 635         else
 636                 ttm_tt_fini(ttm);
 637
 638         if (vmw_be->mob)
 639                 vmw_mob_destroy(vmw_be->mob);
 640
 641         kfree(vmw_be);
 642 }
 643
 644
 645 static int vmw_ttm_populate(struct ttm_bo_device *bdev,
 646                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 647 {
 648         struct vmw_ttm_tt *vmw_tt =
 649                 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 650         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 651         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 652         int ret;
 653
 654         if (ttm_tt_is_populated(ttm))
 655                 return 0;
 656
 657         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 658                 size_t size =
 659                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 660                 ret = ttm_mem_global_alloc(glob, size, ctx);
 661                 if (unlikely(ret != 0))
 662                         return ret;
 663
 664                 ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev,
 665                                         ctx);
 666                 if (unlikely(ret != 0))
 667                         ttm_mem_global_free(glob, size);
 668         } else
 669                 ret = ttm_pool_populate(ttm, ctx);
 670
 671         return ret;
 672 }
 673
 674 static void vmw_ttm_unpopulate(struct ttm_bo_device *bdev,
 675                                struct ttm_tt *ttm)
 676 {
 677         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 678                                                  dma_ttm.ttm);
 679         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 680         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 681
 682
 683         if (vmw_tt->mob) {
 684                 vmw_mob_destroy(vmw_tt->mob);
 685                 vmw_tt->mob = NULL;
 686         }
 687
 688         vmw_ttm_unmap_dma(vmw_tt);
 689         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 690                 size_t size =
 691                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 692
 693                 ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
 694                 ttm_mem_global_free(glob, size);
 695         } else
 696                 ttm_pool_unpopulate(ttm);
 697 }
 698
 699 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 700                                         uint32_t page_flags)
 701 {
 702         struct vmw_ttm_tt *vmw_be;
 703         int ret;
 704
 705         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 706         if (!vmw_be)
 707                 return NULL;
 708
 709         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 710         vmw_be->mob = NULL;
 711
 712         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 713                 ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags);
 714         else
 715                 ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags);
 716         if (unlikely(ret != 0))
 717                 goto out_no_init;
 718
 719         return &vmw_be->dma_ttm.ttm;
 720 out_no_init:
 721         kfree(vmw_be);
 722         return NULL;
 723 }
 724
 725 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 726                      struct ttm_placement *placement)
 727 {
 728         *placement = vmw_sys_placement;
 729 }
 730
 731 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 732 {
 733         struct ttm_object_file *tfile =
 734                 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
 735
 736         return vmw_user_bo_verify_access(bo, tfile);
 737 }
 738
 739 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem)
 740 {
 741         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 742
 743         switch (mem->mem_type) {
 744         case TTM_PL_SYSTEM:
 745         case VMW_PL_GMR:
 746         case VMW_PL_MOB:
 747                 return 0;
 748         case TTM_PL_VRAM:
 749                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 750                         dev_priv->vram_start;
 751                 mem->bus.is_iomem = true;
 752                 break;
 753         default:
 754                 return -EINVAL;
 755         }
 756         return 0;
 757 }
 758
 759 /**
 760  * vmw_move_notify - TTM move_notify_callback
 761  *
 762  * @bo: The TTM buffer object about to move.
 763  * @mem: The struct ttm_resource indicating to what memory
 764  *       region the move is taking place.
 765  *
 766  * Calls move_notify for all subsystems needing it.
 767  * (currently only resources).
 768  */
 769 static void vmw_move_notify(struct ttm_buffer_object *bo,
 770                             bool evict,
 771                             struct ttm_resource *mem)
 772 {
 773         vmw_bo_move_notify(bo, mem);
 774         vmw_query_move_notify(bo, mem);
 775 }
 776
 777
 778 /**
 779  * vmw_swap_notify - TTM move_notify_callback
 780  *
 781  * @bo: The TTM buffer object about to be swapped out.
 782  */
 783 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 784 {
 785         vmw_bo_swap_notify(bo);
 786         (void) ttm_bo_wait(bo, false, false);
 787 }
 788
 789
 790 struct ttm_bo_driver vmw_bo_driver = {
 791         .ttm_tt_create = &vmw_ttm_tt_create,
 792         .ttm_tt_populate = &vmw_ttm_populate,
 793         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 794         .ttm_tt_bind = &vmw_ttm_bind,
 795         .ttm_tt_unbind = &vmw_ttm_unbind,
 796         .ttm_tt_destroy = &vmw_ttm_destroy,
 797         .eviction_valuable = ttm_bo_eviction_valuable,
 798         .evict_flags = vmw_evict_flags,
 799         .move = NULL,
 800         .verify_access = vmw_verify_access,
 801         .move_notify = vmw_move_notify,
 802         .swap_notify = vmw_swap_notify,
 803         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 804 };
 805
 806 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 807                                unsigned long bo_size,
 808                                struct ttm_buffer_object **bo_p)
 809 {
 810         struct ttm_operation_ctx ctx = {
 811                 .interruptible = false,
 812                 .no_wait_gpu = false
 813         };
 814         struct ttm_buffer_object *bo;
 815         int ret;
 816
 817         ret = ttm_bo_create(&dev_priv->bdev, bo_size,
 818                             ttm_bo_type_device,
 819                             &vmw_sys_ne_placement,
 820                             0, false, &bo);
 821
 822         if (unlikely(ret != 0))
 823                 return ret;
 824
 825         ret = ttm_bo_reserve(bo, false, true, NULL);
 826         BUG_ON(ret != 0);
 827         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 828         if (likely(ret == 0)) {
 829                 struct vmw_ttm_tt *vmw_tt =
 830                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
 831                 ret = vmw_ttm_map_dma(vmw_tt);
 832         }
 833
 834         ttm_bo_unreserve(bo);
 835
 836         if (likely(ret == 0))
 837                 *bo_p = bo;
 838         return ret;
 839 }