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 = 0
  38 };
  39
  40 static const struct ttm_place sys_placement_flags = {
  41         .fpfn = 0,
  42         .lpfn = 0,
  43         .mem_type = TTM_PL_SYSTEM,
  44         .flags = 0
  45 };
  46
  47 static const struct ttm_place gmr_placement_flags = {
  48         .fpfn = 0,
  49         .lpfn = 0,
  50         .mem_type = VMW_PL_GMR,
  51         .flags = 0
  52 };
  53
  54 static const struct ttm_place mob_placement_flags = {
  55         .fpfn = 0,
  56         .lpfn = 0,
  57         .mem_type = VMW_PL_MOB,
  58         .flags = 0
  59 };
  60
  61 struct ttm_placement vmw_vram_placement = {
  62         .num_placement = 1,
  63         .placement = &vram_placement_flags,
  64         .num_busy_placement = 1,
  65         .busy_placement = &vram_placement_flags
  66 };
  67
  68 static const struct ttm_place vram_gmr_placement_flags[] = {
  69         {
  70                 .fpfn = 0,
  71                 .lpfn = 0,
  72                 .mem_type = TTM_PL_VRAM,
  73                 .flags = 0
  74         }, {
  75                 .fpfn = 0,
  76                 .lpfn = 0,
  77                 .mem_type = VMW_PL_GMR,
  78                 .flags = 0
  79         }
  80 };
  81
  82 static const struct ttm_place gmr_vram_placement_flags[] = {
  83         {
  84                 .fpfn = 0,
  85                 .lpfn = 0,
  86                 .mem_type = VMW_PL_GMR,
  87                 .flags = 0
  88         }, {
  89                 .fpfn = 0,
  90                 .lpfn = 0,
  91                 .mem_type = TTM_PL_VRAM,
  92                 .flags = 0
  93         }
  94 };
  95
  96 struct ttm_placement vmw_vram_gmr_placement = {
  97         .num_placement = 2,
  98         .placement = vram_gmr_placement_flags,
  99         .num_busy_placement = 1,
 100         .busy_placement = &gmr_placement_flags
 101 };
 102
 103 struct ttm_placement vmw_vram_sys_placement = {
 104         .num_placement = 1,
 105         .placement = &vram_placement_flags,
 106         .num_busy_placement = 1,
 107         .busy_placement = &sys_placement_flags
 108 };
 109
 110 struct ttm_placement vmw_sys_placement = {
 111         .num_placement = 1,
 112         .placement = &sys_placement_flags,
 113         .num_busy_placement = 1,
 114         .busy_placement = &sys_placement_flags
 115 };
 116
 117 static const struct ttm_place evictable_placement_flags[] = {
 118         {
 119                 .fpfn = 0,
 120                 .lpfn = 0,
 121                 .mem_type = TTM_PL_SYSTEM,
 122                 .flags = 0
 123         }, {
 124                 .fpfn = 0,
 125                 .lpfn = 0,
 126                 .mem_type = TTM_PL_VRAM,
 127                 .flags = 0
 128         }, {
 129                 .fpfn = 0,
 130                 .lpfn = 0,
 131                 .mem_type = VMW_PL_GMR,
 132                 .flags = 0
 133         }, {
 134                 .fpfn = 0,
 135                 .lpfn = 0,
 136                 .mem_type = VMW_PL_MOB,
 137                 .flags = 0
 138         }
 139 };
 140
 141 static const struct ttm_place nonfixed_placement_flags[] = {
 142         {
 143                 .fpfn = 0,
 144                 .lpfn = 0,
 145                 .mem_type = TTM_PL_SYSTEM,
 146                 .flags = 0
 147         }, {
 148                 .fpfn = 0,
 149                 .lpfn = 0,
 150                 .mem_type = VMW_PL_GMR,
 151                 .flags = 0
 152         }, {
 153                 .fpfn = 0,
 154                 .lpfn = 0,
 155                 .mem_type = VMW_PL_MOB,
 156                 .flags = 0
 157         }
 158 };
 159
 160 struct ttm_placement vmw_evictable_placement = {
 161         .num_placement = 4,
 162         .placement = evictable_placement_flags,
 163         .num_busy_placement = 1,
 164         .busy_placement = &sys_placement_flags
 165 };
 166
 167 struct ttm_placement vmw_srf_placement = {
 168         .num_placement = 1,
 169         .num_busy_placement = 2,
 170         .placement = &gmr_placement_flags,
 171         .busy_placement = gmr_vram_placement_flags
 172 };
 173
 174 struct ttm_placement vmw_mob_placement = {
 175         .num_placement = 1,
 176         .num_busy_placement = 1,
 177         .placement = &mob_placement_flags,
 178         .busy_placement = &mob_placement_flags
 179 };
 180
 181 struct ttm_placement vmw_nonfixed_placement = {
 182         .num_placement = 3,
 183         .placement = nonfixed_placement_flags,
 184         .num_busy_placement = 1,
 185         .busy_placement = &sys_placement_flags
 186 };
 187
 188 struct vmw_ttm_tt {
 189         struct ttm_tt dma_ttm;
 190         struct vmw_private *dev_priv;
 191         int gmr_id;
 192         struct vmw_mob *mob;
 193         int mem_type;
 194         struct sg_table sgt;
 195         struct vmw_sg_table vsgt;
 196         uint64_t sg_alloc_size;
 197         bool mapped;
 198         bool bound;
 199 };
 200
 201 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
 202
 203 /**
 204  * Helper functions to advance a struct vmw_piter iterator.
 205  *
 206  * @viter: Pointer to the iterator.
 207  *
 208  * These functions return false if past the end of the list,
 209  * true otherwise. Functions are selected depending on the current
 210  * DMA mapping mode.
 211  */
 212 static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
 213 {
 214         return ++(viter->i) < viter->num_pages;
 215 }
 216
 217 static bool __vmw_piter_sg_next(struct vmw_piter *viter)
 218 {
 219         bool ret = __vmw_piter_non_sg_next(viter);
 220
 221         return __sg_page_iter_dma_next(&viter->iter) && ret;
 222 }
 223
 224
 225 /**
 226  * Helper functions to return a pointer to the current page.
 227  *
 228  * @viter: Pointer to the iterator
 229  *
 230  * These functions return a pointer to the page currently
 231  * pointed to by @viter. Functions are selected depending on the
 232  * current mapping mode.
 233  */
 234 static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
 235 {
 236         return viter->pages[viter->i];
 237 }
 238
 239 /**
 240  * Helper functions to return the DMA address of the current page.
 241  *
 242  * @viter: Pointer to the iterator
 243  *
 244  * These functions return the DMA address of the page currently
 245  * pointed to by @viter. Functions are selected depending on the
 246  * current mapping mode.
 247  */
 248 static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
 249 {
 250         return page_to_phys(viter->pages[viter->i]);
 251 }
 252
 253 static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
 254 {
 255         return viter->addrs[viter->i];
 256 }
 257
 258 static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
 259 {
 260         return sg_page_iter_dma_address(&viter->iter);
 261 }
 262
 263
 264 /**
 265  * vmw_piter_start - Initialize a struct vmw_piter.
 266  *
 267  * @viter: Pointer to the iterator to initialize
 268  * @vsgt: Pointer to a struct vmw_sg_table to initialize from
 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->dev->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->dev->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->dev->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_bo_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_bo_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_bo_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_bo_device *bdev,
 577                             struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
 578 {
 579         struct vmw_ttm_tt *vmw_tt =
 580                 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
 581         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 582         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 583         int ret;
 584
 585         if (ttm_tt_is_populated(ttm))
 586                 return 0;
 587
 588         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 589                 size_t size =
 590                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 591                 ret = ttm_mem_global_alloc(glob, size, ctx);
 592                 if (unlikely(ret != 0))
 593                         return ret;
 594
 595                 ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev,
 596                                         ctx);
 597                 if (unlikely(ret != 0))
 598                         ttm_mem_global_free(glob, size);
 599         } else
 600                 ret = ttm_pool_populate(ttm, ctx);
 601
 602         return ret;
 603 }
 604
 605 static void vmw_ttm_unpopulate(struct ttm_bo_device *bdev,
 606                                struct ttm_tt *ttm)
 607 {
 608         struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
 609                                                  dma_ttm);
 610         struct vmw_private *dev_priv = vmw_tt->dev_priv;
 611         struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
 612
 613
 614         if (vmw_tt->mob) {
 615                 vmw_mob_destroy(vmw_tt->mob);
 616                 vmw_tt->mob = NULL;
 617         }
 618
 619         vmw_ttm_unmap_dma(vmw_tt);
 620         if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
 621                 size_t size =
 622                         ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
 623
 624                 ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
 625                 ttm_mem_global_free(glob, size);
 626         } else
 627                 ttm_pool_unpopulate(ttm);
 628 }
 629
 630 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 631                                         uint32_t page_flags)
 632 {
 633         struct vmw_ttm_tt *vmw_be;
 634         int ret;
 635
 636         vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
 637         if (!vmw_be)
 638                 return NULL;
 639
 640         vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
 641         vmw_be->mob = NULL;
 642
 643         if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
 644                 ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 645                                       ttm_cached);
 646         else
 647                 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
 648                                   ttm_cached);
 649         if (unlikely(ret != 0))
 650                 goto out_no_init;
 651
 652         return &vmw_be->dma_ttm;
 653 out_no_init:
 654         kfree(vmw_be);
 655         return NULL;
 656 }
 657
 658 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 659                      struct ttm_placement *placement)
 660 {
 661         *placement = vmw_sys_placement;
 662 }
 663
 664 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 665 {
 666         struct ttm_object_file *tfile =
 667                 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
 668
 669         return vmw_user_bo_verify_access(bo, tfile);
 670 }
 671
 672 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_resource *mem)
 673 {
 674         struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 675
 676         switch (mem->mem_type) {
 677         case TTM_PL_SYSTEM:
 678         case VMW_PL_GMR:
 679         case VMW_PL_MOB:
 680                 return 0;
 681         case TTM_PL_VRAM:
 682                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
 683                         dev_priv->vram_start;
 684                 mem->bus.is_iomem = true;
 685                 mem->bus.caching = ttm_cached;
 686                 break;
 687         default:
 688                 return -EINVAL;
 689         }
 690         return 0;
 691 }
 692
 693 /**
 694  * vmw_move_notify - TTM move_notify_callback
 695  *
 696  * @bo: The TTM buffer object about to move.
 697  * @mem: The struct ttm_resource indicating to what memory
 698  *       region the move is taking place.
 699  *
 700  * Calls move_notify for all subsystems needing it.
 701  * (currently only resources).
 702  */
 703 static void vmw_move_notify(struct ttm_buffer_object *bo,
 704                             bool evict,
 705                             struct ttm_resource *mem)
 706 {
 707         if (!mem)
 708                 return;
 709         vmw_bo_move_notify(bo, mem);
 710         vmw_query_move_notify(bo, mem);
 711 }
 712
 713
 714 /**
 715  * vmw_swap_notify - TTM move_notify_callback
 716  *
 717  * @bo: The TTM buffer object about to be swapped out.
 718  */
 719 static void vmw_swap_notify(struct ttm_buffer_object *bo)
 720 {
 721         vmw_bo_swap_notify(bo);
 722         (void) ttm_bo_wait(bo, false, false);
 723 }
 724
 725 static int vmw_move(struct ttm_buffer_object *bo,
 726                     bool evict,
 727                     struct ttm_operation_ctx *ctx,
 728                     struct ttm_resource *new_mem)
 729 {
 730         struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->mem.mem_type);
 731         struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
 732         int ret;
 733
 734         if (new_man->use_tt && new_mem->mem_type != TTM_PL_SYSTEM) {
 735                 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
 736                 if (ret)
 737                         return ret;
 738         }
 739
 740         vmw_move_notify(bo, evict, new_mem);
 741
 742         if (old_man->use_tt && new_man->use_tt) {
 743                 if (bo->mem.mem_type == TTM_PL_SYSTEM) {
 744                         ttm_bo_assign_mem(bo, new_mem);
 745                         return 0;
 746                 }
 747                 ret = ttm_bo_wait_ctx(bo, ctx);
 748                 if (ret)
 749                         goto fail;
 750
 751                 vmw_ttm_unbind(bo->bdev, bo->ttm);
 752                 ttm_resource_free(bo, &bo->mem);
 753                 ttm_bo_assign_mem(bo, new_mem);
 754                 return 0;
 755         } else {
 756                 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 757                 if (ret)
 758                         goto fail;
 759         }
 760         return 0;
 761 fail:
 762         swap(*new_mem, bo->mem);
 763         vmw_move_notify(bo, false, new_mem);
 764         swap(*new_mem, bo->mem);
 765         return ret;
 766 }
 767
 768 static void
 769 vmw_delete_mem_notify(struct ttm_buffer_object *bo)
 770 {
 771         vmw_move_notify(bo, false, NULL);
 772 }
 773
 774 struct ttm_bo_driver vmw_bo_driver = {
 775         .ttm_tt_create = &vmw_ttm_tt_create,
 776         .ttm_tt_populate = &vmw_ttm_populate,
 777         .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
 778         .ttm_tt_destroy = &vmw_ttm_destroy,
 779         .eviction_valuable = ttm_bo_eviction_valuable,
 780         .evict_flags = vmw_evict_flags,
 781         .move = vmw_move,
 782         .verify_access = vmw_verify_access,
 783         .delete_mem_notify = vmw_delete_mem_notify,
 784         .swap_notify = vmw_swap_notify,
 785         .io_mem_reserve = &vmw_ttm_io_mem_reserve,
 786 };
 787
 788 int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
 789                                unsigned long bo_size,
 790                                struct ttm_buffer_object **bo_p)
 791 {
 792         struct ttm_operation_ctx ctx = {
 793                 .interruptible = false,
 794                 .no_wait_gpu = false
 795         };
 796         struct ttm_buffer_object *bo;
 797         int ret;
 798
 799         ret = vmw_bo_create_kernel(dev_priv, bo_size,
 800                                    &vmw_sys_placement,
 801                                    &bo);
 802         if (unlikely(ret != 0))
 803                 return ret;
 804
 805         ret = ttm_bo_reserve(bo, false, true, NULL);
 806         BUG_ON(ret != 0);
 807         ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
 808         if (likely(ret == 0)) {
 809                 struct vmw_ttm_tt *vmw_tt =
 810                         container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
 811                 ret = vmw_ttm_map_dma(vmw_tt);
 812         }
 813
 814         ttm_bo_unreserve(bo);
 815
 816         if (likely(ret == 0))
 817                 *bo_p = bo;
 818         return ret;
 819 }