drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include <drm/ttm/ttm_bo_driver.h>
  30 #include <drm/ttm/ttm_placement.h>
  31
  32 static const struct ttm_place vram_placement_flags = {
  33         .fpfn = 0,
  34         .lpfn = 0,
  35         .mem_type = TTM_PL_VRAM,
  36         .flags = 0
  37 };
  38
  39 static const struct ttm_place sys_placement_flags = {
  40         .fpfn = 0,
  41         .lpfn = 0,
  42         .mem_type = TTM_PL_SYSTEM,
  43         .flags = 0
  44 };
  45
  46 static const struct ttm_place gmr_placement_flags = {
  47         .fpfn = 0,
  48         .lpfn = 0,
  49         .mem_type = VMW_PL_GMR,
  50         .flags = 0
  51 };
  52
  53 static const struct ttm_place mob_placement_flags = {
  54         .fpfn = 0,
  55         .lpfn = 0,
  56         .mem_type = VMW_PL_MOB,
  57         .flags = 0
  58 };
  59
  60 struct ttm_placement vmw_vram_placement = {
  61         .num_placement = 1,
  62         .placement = &vram_placement_flags,
  63         .num_busy_placement = 1,
  64         .busy_placement = &vram_placement_flags
  65 };
  66
  67 static const struct ttm_place vram_gmr_placement_flags[] = {
  68         {
  69                 .fpfn = 0,
  70                 .lpfn = 0,
  71                 .mem_type = TTM_PL_VRAM,
  72                 .flags = 0
  73         }, {
  74                 .fpfn = 0,
  75                 .lpfn = 0,
  76                 .mem_type = VMW_PL_GMR,
  77                 .flags = 0
  78         }
  79 };
  80
  81 static const struct ttm_place gmr_vram_placement_flags[] = {
  82         {
  83                 .fpfn = 0,
  84                 .lpfn = 0,
  85                 .mem_type = VMW_PL_GMR,
  86                 .flags = 0
  87         }, {
  88                 .fpfn = 0,
  89                 .lpfn = 0,
  90                 .mem_type = TTM_PL_VRAM,
  91                 .flags = 0
  92         }
  93 };
  94
  95 static const struct ttm_place vmw_sys_placement_flags = {
  96         .fpfn = 0,
  97         .lpfn = 0,
  98         .mem_type = VMW_PL_SYSTEM,
  99         .flags = 0
 100 };
 101
 102 struct ttm_placement vmw_vram_gmr_placement = {
 103         .num_placement = 2,
 104         .placement = vram_gmr_placement_flags,
 105         .num_busy_placement = 1,
 106         .busy_placement = &gmr_placement_flags
 107 };
 108
 109 struct ttm_placement vmw_vram_sys_placement = {
 110         .num_placement = 1,
 111         .placement = &vram_placement_flags,
 112         .num_busy_placement = 1,
 113         .busy_placement = &sys_placement_flags
 114 };
 115
 116 struct ttm_placement vmw_sys_placement = {
 117         .num_placement = 1,
 118         .placement = &sys_placement_flags,
 119         .num_busy_placement = 1,
 120         .busy_placement = &sys_placement_flags
 121 };
 122
 123 struct ttm_placement vmw_pt_sys_placement = {
 124         .num_placement = 1,
 125         .placement = &vmw_sys_placement_flags,
 126         .num_busy_placement = 1,
 127         .busy_placement = &vmw_sys_placement_flags
 128 };
 129
 130 static const struct ttm_place nonfixed_placement_flags[] = {
 131         {
 132                 .fpfn = 0,
 133                 .lpfn = 0,
 134                 .mem_type = TTM_PL_SYSTEM,
 135                 .flags = 0
 136         }, {
 137                 .fpfn = 0,
 138                 .lpfn = 0,
 139                 .mem_type = VMW_PL_GMR,
 140                 .flags = 0
 141         }, {
 142                 .fpfn = 0,
 143                 .lpfn = 0,
 144                 .mem_type = VMW_PL_MOB,
 145                 .flags = 0
 146         }
 147 };
 148
 149 struct ttm_placement vmw_srf_placement = {
 150         .num_placement = 1,
 151         .num_busy_placement = 2,
 152         .placement = &gmr_placement_flags,
 153         .busy_placement = gmr_vram_placement_flags
 154 };
 155
 156 struct ttm_placement vmw_mob_placement = {
 157         .num_placement = 1,
 158         .num_busy_placement = 1,
 159         .placement = &mob_placement_flags,
 160         .busy_placement = &mob_placement_flags
 161 };
 162
 163 struct ttm_placement vmw_nonfixed_placement = {
 164         .num_placement = 3,
 165         .placement = nonfixed_placement_flags,
 166         .num_busy_placement = 1,
 167         .busy_placement = &sys_placement_flags
 168 };
 169
 170 struct vmw_ttm_tt {
 171         struct ttm_tt dma_ttm;
 172         struct vmw_private *dev_priv;
 173         int gmr_id;
 174         struct vmw_mob *mob;
 175         int mem_type;
 176         struct sg_table sgt;
 177         struct vmw_sg_table vsgt;
 178         uint64_t sg_alloc_size;
 179         bool mapped;
 180         bool bound;
 181 };
 182
 183 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 184
 185 /**
 186  * __vmw_piter_non_sg_next: Helper functions to advance
 187  * a struct vmw_piter iterator.
 188  *
 189  * @viter: Pointer to the iterator.
 190  *
 191  * These functions return false if past the end of the list,
 192  * true otherwise. Functions are selected depending on the current
 193  * DMA mapping mode.
 194  */
 195 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 196 {
 197         return ++(viter->i) < viter->num_pages;
 198 }
 199
 200 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 201 {
 202         bool ret = __vmw_piter_non_sg_next(viter);
 203
 204         return __sg_page_iter_dma_next(&viter->iter) && ret;
 205 }
 206
 207
 208 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 209 {
 210         return viter->addrs[viter->i];
 211 }
 212
 213 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 214 {
 215         return sg_page_iter_dma_address(&viter->iter);
 216 }
 217
 218
 219 /**
 220  * vmw_piter_start - Initialize a struct vmw_piter.
 221  *
 222  * @viter: Pointer to the iterator to initialize
 223  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 224  * @p_offset: Pointer offset used to update current array position
 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         viter->pages = vsgt->pages;
 236         switch (vsgt->mode) {
 237         case vmw_dma_alloc_coherent:
 238                 viter->next = &__vmw_piter_non_sg_next;
 239                 viter->dma_address = &__vmw_piter_dma_addr;
 240                 viter->addrs = vsgt->addrs;
 241                 break;
 242         case vmw_dma_map_populate:
 243         case vmw_dma_map_bind:
 244                 viter->next = &__vmw_piter_sg_next;
 245                 viter->dma_address = &__vmw_piter_sg_addr;
 246                 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
 247                                      vsgt->sgt->orig_nents, p_offset);
 248                 break;
 249         default:
 250                 BUG();
 251         }
 252 }
 253
 254 /**
 255  * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
 256  * TTM pages
 257  *
 258  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 259  *
 260  * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
 261  */
 262 static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
 263 {
 264         struct device *dev = vmw_tt->dev_priv->drm.dev;
 265
 266         dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 267         vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
 268 }
 269
 270 /**
 271  * vmw_ttm_map_for_dma - map TTM pages to get device addresses
 272  *
 273  * @vmw_tt: Pointer to a struct vmw_ttm_backend
 274  *
 275  * This function is used to get device addresses from the kernel DMA layer.
 276  * However, it's violating the DMA API in that when this operation has been
 277  * performed, it's illegal for the CPU to write to the pages without first
 278  * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
 279  * therefore only legal to call this function if we know that the function
 280  * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
 281  * a CPU write buffer flush.
 282  */
 283 static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
 284 {
 285         struct device *dev = vmw_tt->dev_priv->drm.dev;
 286
 287         return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
 288 }
 289
 290 /**
 291  * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
 292  *
 293  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 294  *
 295  * Select the correct function for and make sure the TTM pages are
 296  * visible to the device. Allocate storage for the device mappings.
 297  * If a mapping has already been performed, indicated by the storage
 298  * pointer being non NULL, the function returns success.
 299  */
 300 static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
 301 {
 302         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 303         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 304         struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
 305         struct ttm_operation_ctx ctx = {
 306                 .interruptible = true,
 307                 .no_wait_gpu = false
 308         };
 309         struct vmw_piter iter;
 310         dma_addr_t old;
 311         int ret = 0;
 312         static size_t sgl_size;
 313         static size_t sgt_size;
 314
 315         if (vmw_tt->mapped)
 316                 return 0;
 317
 318         vsgt->mode = dev_priv->map_mode;
 319         vsgt->pages = vmw_tt->dma_ttm.pages;
 320         vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
 321         vsgt->addrs = vmw_tt->dma_ttm.dma_address;
 322         vsgt->sgt = &vmw_tt->sgt;
 323
 324         switch (dev_priv->map_mode) {
 325         case vmw_dma_map_bind:
 326         case vmw_dma_map_populate:
 327                 if (unlikely(!sgl_size)) {
 328                         sgl_size = ttm_round_pot(sizeof(struct scatterlist));
 329                         sgt_size = ttm_round_pot(sizeof(struct sg_table));
 330                 }
 331                 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
 332                 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
 333                 if (unlikely(ret != 0))
 334                         return ret;
 335
 336                 ret = sg_alloc_table_from_pages_segment(
 337                         &vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
 338                         (unsigned long)vsgt->num_pages << PAGE_SHIFT,
 339                         dma_get_max_seg_size(dev_priv->drm.dev), GFP_KERNEL);
 340                 if (ret)
 341                         goto out_sg_alloc_fail;
 342
 343                 if (vsgt->num_pages > vmw_tt->sgt.orig_nents) {
 344                         uint64_t over_alloc =
 345                                 sgl_size * (vsgt->num_pages -
 346                                             vmw_tt->sgt.orig_nents);
 347
 348                         ttm_mem_global_free(glob, over_alloc);
 349                         vmw_tt->sg_alloc_size -= over_alloc;
 350                 }
 351
 352                 ret = vmw_ttm_map_for_dma(vmw_tt);
 353                 if (unlikely(ret != 0))
 354                         goto out_map_fail;
 355
 356                 break;
 357         default:
 358                 break;
 359         }
 360
 361         old = ~((dma_addr_t) 0);
 362         vmw_tt->vsgt.num_regions = 0;
 363         for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
 364                 dma_addr_t cur = vmw_piter_dma_addr(&iter);
 365
 366                 if (cur != old + PAGE_SIZE)
 367                         vmw_tt->vsgt.num_regions++;
 368                 old = cur;
 369         }
 370
 371         vmw_tt->mapped = true;
 372         return 0;
 373
 374 out_map_fail:
 375         sg_free_table(vmw_tt->vsgt.sgt);
 376         vmw_tt->vsgt.sgt = NULL;
 377 out_sg_alloc_fail:
 378         ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
 379         return ret;
 380 }
 381
 382 /**
 383  * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
 384  *
 385  * @vmw_tt: Pointer to a struct vmw_ttm_tt
 386  *
 387  * Tear down any previously set up device DMA mappings and free
 388  * any storage space allocated for them. If there are no mappings set up,
 389  * this function is a NOP.
 390  */
 391 static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
 392 {
 393         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 394
 395         if (!vmw_tt->vsgt.sgt)
 396                 return;
 397
 398         switch (dev_priv->map_mode) {
 399         case vmw_dma_map_bind:
 400         case vmw_dma_map_populate:
 401                 vmw_ttm_unmap_from_dma(vmw_tt);
 402                 sg_free_table(vmw_tt->vsgt.sgt);
 403                 vmw_tt->vsgt.sgt = NULL;
 404                 ttm_mem_global_free(vmw_mem_glob(dev_priv),
 405                                     vmw_tt->sg_alloc_size);
 406                 break;
 407         default:
 408                 break;
 409         }
 410         vmw_tt->mapped = false;
 411 }
 412
 413 /**
 414  * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
 415  * TTM buffer object
 416  *
 417  * @bo: Pointer to a struct ttm_buffer_object
 418  *
 419  * Returns a pointer to a struct vmw_sg_table object. The object should
 420  * not be freed after use.
 421  * Note that for the device addresses to be valid, the buffer object must
 422  * either be reserved or pinned.
 423  */
 424 const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
 425 {
 426         struct vmw_ttm_tt *vmw_tt =
 427                 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 428
 429         return &vmw_tt->vsgt;
 430 }
 431
 432
 433 static int vmw_ttm_bind(struct ttm_device *bdev,
 434                         struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 435 {
 436         struct vmw_ttm_tt *vmw_be =
 437                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 438         int ret = 0;
 439
 440         if (!bo_mem)
 441                 return -EINVAL;
 442
 443         if (vmw_be->bound)
 444                 return 0;
 445
 446         ret = vmw_ttm_map_dma(vmw_be);
 447         if (unlikely(ret != 0))
 448                 return ret;
 449
 450         vmw_be->gmr_id = bo_mem->start;
 451         vmw_be->mem_type = bo_mem->mem_type;
 452
 453         switch (bo_mem->mem_type) {
 454         case VMW_PL_GMR:
 455                 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
 456                                     ttm->num_pages, vmw_be->gmr_id);
 457                 break;
 458         case VMW_PL_MOB:
 459                 if (unlikely(vmw_be->mob == NULL)) {
 460                         vmw_be->mob =
 461                                 vmw_mob_create(ttm->num_pages);
 462                         if (unlikely(vmw_be->mob == NULL))
 463                                 return -ENOMEM;
 464                 }
 465
 466                 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
 467                                     &vmw_be->vsgt, ttm->num_pages,
 468                                     vmw_be->gmr_id);
 469                 break;
 470         case VMW_PL_SYSTEM:
 471                 /* Nothing to be done for a system bind */
 472                 break;
 473         default:
 474                 BUG();
 475         }
 476         vmw_be->bound = true;
 477         return ret;
 478 }
 479
 480 static void vmw_ttm_unbind(struct ttm_device *bdev,
 481                            struct ttm_tt *ttm)
 482 {
 483         struct vmw_ttm_tt *vmw_be =
 484                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 485
 486         if (!vmw_be->bound)
 487                 return;
 488
 489         switch (vmw_be->mem_type) {
 490         case VMW_PL_GMR:
 491                 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 492                 break;
 493         case VMW_PL_MOB:
 494                 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
 495                 break;
 496         case VMW_PL_SYSTEM:
 497                 break;
 498         default:
 499                 BUG();
 500         }
 501
 502         if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
 503                 vmw_ttm_unmap_dma(vmw_be);
 504         vmw_be->bound = false;
 505 }
 506
 507
 508 static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 509 {
 510         struct vmw_ttm_tt *vmw_be =
 511                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 512
 513         vmw_ttm_unbind(bdev, ttm);
 514         ttm_tt_destroy_common(bdev, ttm);
 515         vmw_ttm_unmap_dma(vmw_be);
 516         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 517                 ttm_tt_fini(&vmw_be->dma_ttm);
 518         else
 519                 ttm_tt_fini(ttm);
 520
 521         if (vmw_be->mob)
 522                 vmw_mob_destroy(vmw_be->mob);
 523
 524         kfree(vmw_be);
 525 }
 526
 527
 528 static int vmw_ttm_populate(struct ttm_device *bdev,
 529                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 530 {
 531         unsigned int i;
 532         int ret;
 533
 534         /* TODO: maybe completely drop this ? */
 535         if (ttm_tt_is_populated(ttm))
 536                 return 0;
 537
 538         ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
 539         if (ret)
 540                 return ret;
 541
 542         for (i = 0; i < ttm->num_pages; ++i) {
 543                 ret = ttm_mem_global_alloc_page(&ttm_mem_glob, ttm->pages[i],
 544                                                 PAGE_SIZE, ctx);
 545                 if (ret)
 546                         goto error;
 547         }
 548         return 0;
 549
 550 error:
 551         while (i--)
 552                 ttm_mem_global_free_page(&ttm_mem_glob, ttm->pages[i],
 553                                          PAGE_SIZE);
 554         ttm_pool_free(&bdev->pool, ttm);
 555         return ret;
 556 }
 557
 558 static void vmw_ttm_unpopulate(struct ttm_device *bdev,
 559                                struct ttm_tt *ttm)
 560 {
 561         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 562                                                  dma_ttm);
 563         unsigned int i;
 564
 565         if (vmw_tt->mob) {
 566                 vmw_mob_destroy(vmw_tt->mob);
 567                 vmw_tt->mob = NULL;
 568         }
 569
 570         vmw_ttm_unmap_dma(vmw_tt);
 571
 572         for (i = 0; i < ttm->num_pages; ++i)
 573                 ttm_mem_global_free_page(&ttm_mem_glob, ttm->pages[i],
 574                                          PAGE_SIZE);
 575
 576         ttm_pool_free(&bdev->pool, ttm);
 577 }
 578
 579 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 580                                         uint32_t page_flags)
 581 {
 582         struct vmw_ttm_tt *vmw_be;
 583         int ret;
 584
 585         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 586         if (!vmw_be)
 587                 return NULL;
 588
 589         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 590         vmw_be->mob = NULL;
 591
 592         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 593                 ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 594                                      ttm_cached);
 595         else
 596                 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 597                                   ttm_cached);
 598         if (unlikely(ret != 0))
 599                 goto out_no_init;
 600
 601         return &vmw_be->dma_ttm;
 602 out_no_init:
 603         kfree(vmw_be);
 604         return NULL;
 605 }
 606
 607 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 608                      struct ttm_placement *placement)
 609 {
 610         *placement = vmw_sys_placement;
 611 }
 612
 613 static int vmw_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
 614 {
 615         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 616
 617         switch (mem->mem_type) {
 618         case TTM_PL_SYSTEM:
 619         case VMW_PL_SYSTEM:
 620         case VMW_PL_GMR:
 621         case VMW_PL_MOB:
 622                 return 0;
 623         case TTM_PL_VRAM:
 624                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 625                         dev_priv->vram_start;
 626                 mem->bus.is_iomem = true;
 627                 mem->bus.caching = ttm_cached;
 628                 break;
 629         default:
 630                 return -EINVAL;
 631         }
 632         return 0;
 633 }
 634
 635 /**
 636  * vmw_move_notify - TTM move_notify_callback
 637  *
 638  * @bo: The TTM buffer object about to move.
 639  * @old_mem: The old memory where we move from
 640  * @new_mem: The struct ttm_resource indicating to what memory
 641  *       region the move is taking place.
 642  *
 643  * Calls move_notify for all subsystems needing it.
 644  * (currently only resources).
 645  */
 646 static void vmw_move_notify(struct ttm_buffer_object *bo,
 647                             struct ttm_resource *old_mem,
 648                             struct ttm_resource *new_mem)
 649 {
 650         vmw_bo_move_notify(bo, new_mem);
 651         vmw_query_move_notify(bo, old_mem, new_mem);
 652 }
 653
 654
 655 /**
 656  * vmw_swap_notify - TTM move_notify_callback
 657  *
 658  * @bo: The TTM buffer object about to be swapped out.
 659  */
 660 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 661 {
 662         vmw_bo_swap_notify(bo);
 663         (void) ttm_bo_wait(bo, false, false);
 664 }
 665
 666 static bool vmw_memtype_is_system(uint32_t mem_type)
 667 {
 668         return mem_type == TTM_PL_SYSTEM || mem_type == VMW_PL_SYSTEM;
 669 }
 670
 671 static int vmw_move(struct ttm_buffer_object *bo,
 672                     bool evict,
 673                     struct ttm_operation_ctx *ctx,
 674                     struct ttm_resource *new_mem,
 675                     struct ttm_place *hop)
 676 {
 677         struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
 678         struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
 679         int ret;
 680
 681         if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) {
 682                 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
 683                 if (ret)
 684                         return ret;
 685         }
 686
 687         vmw_move_notify(bo, bo->resource, new_mem);
 688
 689         if (old_man->use_tt && new_man->use_tt) {
 690                 if (vmw_memtype_is_system(bo->resource->mem_type)) {
 691                         ttm_bo_move_null(bo, new_mem);
 692                         return 0;
 693                 }
 694                 ret = ttm_bo_wait_ctx(bo, ctx);
 695                 if (ret)
 696                         goto fail;
 697
 698                 vmw_ttm_unbind(bo->bdev, bo->ttm);
 699                 ttm_resource_free(bo, &bo->resource);
 700                 ttm_bo_assign_mem(bo, new_mem);
 701                 return 0;
 702         } else {
 703                 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 704                 if (ret)
 705                         goto fail;
 706         }
 707         return 0;
 708 fail:
 709         vmw_move_notify(bo, new_mem, bo->resource);
 710         return ret;
 711 }
 712
 713 struct ttm_device_funcs vmw_bo_driver = {
 714         .ttm_tt_create = &vmw_ttm_tt_create,
 715         .ttm_tt_populate = &vmw_ttm_populate,
 716         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 717         .ttm_tt_destroy = &vmw_ttm_destroy,
 718         .eviction_valuable = ttm_bo_eviction_valuable,
 719         .evict_flags = vmw_evict_flags,
 720         .move = vmw_move,
 721         .swap_notify = vmw_swap_notify,
 722         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 723 };
 724
 725 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 726                                unsigned long bo_size,
 727                                struct ttm_buffer_object **bo_p)
 728 {
 729         struct ttm_operation_ctx ctx = {
 730                 .interruptible = false,
 731                 .no_wait_gpu = false
 732         };
 733         struct ttm_buffer_object *bo;
 734         int ret;
 735
 736         ret = vmw_bo_create_kernel(dev_priv, bo_size,
 737                                    &vmw_pt_sys_placement,
 738                                    &bo);
 739         if (unlikely(ret != 0))
 740                 return ret;
 741
 742         ret = ttm_bo_reserve(bo, false, true, NULL);
 743         BUG_ON(ret != 0);
 744         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 745         if (likely(ret == 0)) {
 746                 struct vmw_ttm_tt *vmw_tt =
 747                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 748                 ret = vmw_ttm_map_dma(vmw_tt);
 749         }
 750
 751         ttm_bo_unreserve(bo);
 752
 753         if (likely(ret == 0))
 754                 *bo_p = bo;
 755         return ret;
 756 }