drivers/gpu/drm/radeon/radeon_ttm.c

   1 /*
   2  * Copyright 2009 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Jerome Glisse <glisse@freedesktop.org>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32
  33 #include <linux/dma-mapping.h>
  34 #include <linux/pagemap.h>
  35 #include <linux/pci.h>
  36 #include <linux/seq_file.h>
  37 #include <linux/slab.h>
  38 #include <linux/swap.h>
  39 #include <linux/swiotlb.h>
  40
  41 #include <drm/drm_device.h>
  42 #include <drm/drm_file.h>
  43 #include <drm/drm_prime.h>
  44 #include <drm/radeon_drm.h>
  45 #include <drm/ttm/ttm_bo_api.h>
  46 #include <drm/ttm/ttm_bo_driver.h>
  47 #include <drm/ttm/ttm_placement.h>
  48 #include <drm/ttm/ttm_range_manager.h>
  49
  50 #include "radeon_reg.h"
  51 #include "radeon.h"
  52 #include "radeon_ttm.h"
  53
  54 static void radeon_ttm_debugfs_init(struct radeon_device *rdev);
  55
  56 static int radeon_ttm_tt_bind(struct ttm_device *bdev, struct ttm_tt *ttm,
  57                               struct ttm_resource *bo_mem);
  58 static void radeon_ttm_tt_unbind(struct ttm_device *bdev, struct ttm_tt *ttm);
  59
  60 struct radeon_device *radeon_get_rdev(struct ttm_device *bdev)
  61 {
  62         struct radeon_mman *mman;
  63         struct radeon_device *rdev;
  64
  65         mman = container_of(bdev, struct radeon_mman, bdev);
  66         rdev = container_of(mman, struct radeon_device, mman);
  67         return rdev;
  68 }
  69
  70 static int radeon_ttm_init_vram(struct radeon_device *rdev)
  71 {
  72         return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
  73                                   false, rdev->mc.real_vram_size >> PAGE_SHIFT);
  74 }
  75
  76 static int radeon_ttm_init_gtt(struct radeon_device *rdev)
  77 {
  78         return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
  79                                   true, rdev->mc.gtt_size >> PAGE_SHIFT);
  80 }
  81
  82 static void radeon_evict_flags(struct ttm_buffer_object *bo,
  83                                 struct ttm_placement *placement)
  84 {
  85         static const struct ttm_place placements = {
  86                 .fpfn = 0,
  87                 .lpfn = 0,
  88                 .mem_type = TTM_PL_SYSTEM,
  89                 .flags = 0
  90         };
  91
  92         struct radeon_bo *rbo;
  93
  94         if (!radeon_ttm_bo_is_radeon_bo(bo)) {
  95                 placement->placement = &placements;
  96                 placement->busy_placement = &placements;
  97                 placement->num_placement = 1;
  98                 placement->num_busy_placement = 1;
  99                 return;
 100         }
 101         rbo = container_of(bo, struct radeon_bo, tbo);
 102         switch (bo->resource->mem_type) {
 103         case TTM_PL_VRAM:
 104                 if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
 105                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 106                 else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
 107                          bo->resource->start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
 108                         unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
 109                         int i;
 110
 111                         /* Try evicting to the CPU inaccessible part of VRAM
 112                          * first, but only set GTT as busy placement, so this
 113                          * BO will be evicted to GTT rather than causing other
 114                          * BOs to be evicted from VRAM
 115                          */
 116                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
 117                                                          RADEON_GEM_DOMAIN_GTT);
 118                         rbo->placement.num_busy_placement = 0;
 119                         for (i = 0; i < rbo->placement.num_placement; i++) {
 120                                 if (rbo->placements[i].mem_type == TTM_PL_VRAM) {
 121                                         if (rbo->placements[i].fpfn < fpfn)
 122                                                 rbo->placements[i].fpfn = fpfn;
 123                                 } else {
 124                                         rbo->placement.busy_placement =
 125                                                 &rbo->placements[i];
 126                                         rbo->placement.num_busy_placement = 1;
 127                                 }
 128                         }
 129                 } else
 130                         radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
 131                 break;
 132         case TTM_PL_TT:
 133         default:
 134                 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
 135         }
 136         *placement = rbo->placement;
 137 }
 138
 139 static int radeon_move_blit(struct ttm_buffer_object *bo,
 140                         bool evict,
 141                         struct ttm_resource *new_mem,
 142                         struct ttm_resource *old_mem)
 143 {
 144         struct radeon_device *rdev;
 145         uint64_t old_start, new_start;
 146         struct radeon_fence *fence;
 147         unsigned num_pages;
 148         int r, ridx;
 149
 150         rdev = radeon_get_rdev(bo->bdev);
 151         ridx = radeon_copy_ring_index(rdev);
 152         old_start = (u64)old_mem->start << PAGE_SHIFT;
 153         new_start = (u64)new_mem->start << PAGE_SHIFT;
 154
 155         switch (old_mem->mem_type) {
 156         case TTM_PL_VRAM:
 157                 old_start += rdev->mc.vram_start;
 158                 break;
 159         case TTM_PL_TT:
 160                 old_start += rdev->mc.gtt_start;
 161                 break;
 162         default:
 163                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 164                 return -EINVAL;
 165         }
 166         switch (new_mem->mem_type) {
 167         case TTM_PL_VRAM:
 168                 new_start += rdev->mc.vram_start;
 169                 break;
 170         case TTM_PL_TT:
 171                 new_start += rdev->mc.gtt_start;
 172                 break;
 173         default:
 174                 DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
 175                 return -EINVAL;
 176         }
 177         if (!rdev->ring[ridx].ready) {
 178                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 179                 return -EINVAL;
 180         }
 181
 182         BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
 183
 184         num_pages = new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 185         fence = radeon_copy(rdev, old_start, new_start, num_pages, bo->base.resv);
 186         if (IS_ERR(fence))
 187                 return PTR_ERR(fence);
 188
 189         r = ttm_bo_move_accel_cleanup(bo, &fence->base, evict, false, new_mem);
 190         radeon_fence_unref(&fence);
 191         return r;
 192 }
 193
 194 static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
 195                           struct ttm_operation_ctx *ctx,
 196                           struct ttm_resource *new_mem,
 197                           struct ttm_place *hop)
 198 {
 199         struct ttm_resource *old_mem = bo->resource;
 200         struct radeon_device *rdev;
 201         struct radeon_bo *rbo;
 202         int r, old_type;
 203
 204         if (new_mem->mem_type == TTM_PL_TT) {
 205                 r = radeon_ttm_tt_bind(bo->bdev, bo->ttm, new_mem);
 206                 if (r)
 207                         return r;
 208         }
 209
 210         r = ttm_bo_wait_ctx(bo, ctx);
 211         if (r)
 212                 return r;
 213
 214         /* Can't move a pinned BO */
 215         rbo = container_of(bo, struct radeon_bo, tbo);
 216         if (WARN_ON_ONCE(rbo->tbo.pin_count > 0))
 217                 return -EINVAL;
 218
 219         /* Save old type for statistics update */
 220         old_type = old_mem->mem_type;
 221
 222         rdev = radeon_get_rdev(bo->bdev);
 223         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 224                 ttm_bo_move_null(bo, new_mem);
 225                 goto out;
 226         }
 227         if (old_mem->mem_type == TTM_PL_SYSTEM &&
 228             new_mem->mem_type == TTM_PL_TT) {
 229                 ttm_bo_move_null(bo, new_mem);
 230                 goto out;
 231         }
 232
 233         if (old_mem->mem_type == TTM_PL_TT &&
 234             new_mem->mem_type == TTM_PL_SYSTEM) {
 235                 radeon_ttm_tt_unbind(bo->bdev, bo->ttm);
 236                 ttm_resource_free(bo, &bo->resource);
 237                 ttm_bo_assign_mem(bo, new_mem);
 238                 goto out;
 239         }
 240         if (rdev->ring[radeon_copy_ring_index(rdev)].ready &&
 241             rdev->asic->copy.copy != NULL) {
 242                 if ((old_mem->mem_type == TTM_PL_SYSTEM &&
 243                      new_mem->mem_type == TTM_PL_VRAM) ||
 244                     (old_mem->mem_type == TTM_PL_VRAM &&
 245                      new_mem->mem_type == TTM_PL_SYSTEM)) {
 246                         hop->fpfn = 0;
 247                         hop->lpfn = 0;
 248                         hop->mem_type = TTM_PL_TT;
 249                         hop->flags = 0;
 250                         return -EMULTIHOP;
 251                 }
 252
 253                 r = radeon_move_blit(bo, evict, new_mem, old_mem);
 254         } else {
 255                 r = -ENODEV;
 256         }
 257
 258         if (r) {
 259                 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
 260                 if (r)
 261                         return r;
 262         }
 263
 264 out:
 265         /* update statistics */
 266         atomic64_add(bo->base.size, &rdev->num_bytes_moved);
 267         radeon_bo_move_notify(bo, old_type, new_mem);
 268         return 0;
 269 }
 270
 271 static int radeon_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
 272 {
 273         struct radeon_device *rdev = radeon_get_rdev(bdev);
 274         size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
 275
 276         switch (mem->mem_type) {
 277         case TTM_PL_SYSTEM:
 278                 /* system memory */
 279                 return 0;
 280         case TTM_PL_TT:
 281 #if IS_ENABLED(CONFIG_AGP)
 282                 if (rdev->flags & RADEON_IS_AGP) {
 283                         /* RADEON_IS_AGP is set only if AGP is active */
 284                         mem->bus.offset = (mem->start << PAGE_SHIFT) +
 285                                 rdev->mc.agp_base;
 286                         mem->bus.is_iomem = !rdev->agp->cant_use_aperture;
 287                         mem->bus.caching = ttm_write_combined;
 288                 }
 289 #endif
 290                 break;
 291         case TTM_PL_VRAM:
 292                 mem->bus.offset = mem->start << PAGE_SHIFT;
 293                 /* check if it's visible */
 294                 if ((mem->bus.offset + bus_size) > rdev->mc.visible_vram_size)
 295                         return -EINVAL;
 296                 mem->bus.offset += rdev->mc.aper_base;
 297                 mem->bus.is_iomem = true;
 298                 mem->bus.caching = ttm_write_combined;
 299 #ifdef __alpha__
 300                 /*
 301                  * Alpha: use bus.addr to hold the ioremap() return,
 302                  * so we can modify bus.base below.
 303                  */
 304                 mem->bus.addr = ioremap_wc(mem->bus.offset, bus_size);
 305                 if (!mem->bus.addr)
 306                         return -ENOMEM;
 307
 308                 /*
 309                  * Alpha: Use just the bus offset plus
 310                  * the hose/domain memory base for bus.base.
 311                  * It then can be used to build PTEs for VRAM
 312                  * access, as done in ttm_bo_vm_fault().
 313                  */
 314                 mem->bus.offset = (mem->bus.offset & 0x0ffffffffUL) +
 315                         rdev->hose->dense_mem_base;
 316 #endif
 317                 break;
 318         default:
 319                 return -EINVAL;
 320         }
 321         return 0;
 322 }
 323
 324 /*
 325  * TTM backend functions.
 326  */
 327 struct radeon_ttm_tt {
 328         struct ttm_tt           ttm;
 329         u64                             offset;
 330
 331         uint64_t                        userptr;
 332         struct mm_struct                *usermm;
 333         uint32_t                        userflags;
 334         bool bound;
 335 };
 336
 337 /* prepare the sg table with the user pages */
 338 static int radeon_ttm_tt_pin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
 339 {
 340         struct radeon_device *rdev = radeon_get_rdev(bdev);
 341         struct radeon_ttm_tt *gtt = (void *)ttm;
 342         unsigned pinned = 0;
 343         int r;
 344
 345         int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 346         enum dma_data_direction direction = write ?
 347                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 348
 349         if (current->mm != gtt->usermm)
 350                 return -EPERM;
 351
 352         if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
 353                 /* check that we only pin down anonymous memory
 354                    to prevent problems with writeback */
 355                 unsigned long end = gtt->userptr + (u64)ttm->num_pages * PAGE_SIZE;
 356                 struct vm_area_struct *vma;
 357                 vma = find_vma(gtt->usermm, gtt->userptr);
 358                 if (!vma || vma->vm_file || vma->vm_end < end)
 359                         return -EPERM;
 360         }
 361
 362         do {
 363                 unsigned num_pages = ttm->num_pages - pinned;
 364                 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
 365                 struct page **pages = ttm->pages + pinned;
 366
 367                 r = get_user_pages(userptr, num_pages, write ? FOLL_WRITE : 0,
 368                                    pages, NULL);
 369                 if (r < 0)
 370                         goto release_pages;
 371
 372                 pinned += r;
 373
 374         } while (pinned < ttm->num_pages);
 375
 376         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 377                                       (u64)ttm->num_pages << PAGE_SHIFT,
 378                                       GFP_KERNEL);
 379         if (r)
 380                 goto release_sg;
 381
 382         r = dma_map_sgtable(rdev->dev, ttm->sg, direction, 0);
 383         if (r)
 384                 goto release_sg;
 385
 386         drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 387                                        ttm->num_pages);
 388
 389         return 0;
 390
 391 release_sg:
 392         kfree(ttm->sg);
 393
 394 release_pages:
 395         release_pages(ttm->pages, pinned);
 396         return r;
 397 }
 398
 399 static void radeon_ttm_tt_unpin_userptr(struct ttm_device *bdev, struct ttm_tt *ttm)
 400 {
 401         struct radeon_device *rdev = radeon_get_rdev(bdev);
 402         struct radeon_ttm_tt *gtt = (void *)ttm;
 403         struct sg_page_iter sg_iter;
 404
 405         int write = !(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 406         enum dma_data_direction direction = write ?
 407                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 408
 409         /* double check that we don't free the table twice */
 410         if (!ttm->sg || !ttm->sg->sgl)
 411                 return;
 412
 413         /* free the sg table and pages again */
 414         dma_unmap_sgtable(rdev->dev, ttm->sg, direction, 0);
 415
 416         for_each_sgtable_page(ttm->sg, &sg_iter, 0) {
 417                 struct page *page = sg_page_iter_page(&sg_iter);
 418                 if (!(gtt->userflags & RADEON_GEM_USERPTR_READONLY))
 419                         set_page_dirty(page);
 420
 421                 mark_page_accessed(page);
 422                 put_page(page);
 423         }
 424
 425         sg_free_table(ttm->sg);
 426 }
 427
 428 static bool radeon_ttm_backend_is_bound(struct ttm_tt *ttm)
 429 {
 430         struct radeon_ttm_tt *gtt = (void*)ttm;
 431
 432         return (gtt->bound);
 433 }
 434
 435 static int radeon_ttm_backend_bind(struct ttm_device *bdev,
 436                                    struct ttm_tt *ttm,
 437                                    struct ttm_resource *bo_mem)
 438 {
 439         struct radeon_ttm_tt *gtt = (void*)ttm;
 440         struct radeon_device *rdev = radeon_get_rdev(bdev);
 441         uint32_t flags = RADEON_GART_PAGE_VALID | RADEON_GART_PAGE_READ |
 442                 RADEON_GART_PAGE_WRITE;
 443         int r;
 444
 445         if (gtt->bound)
 446                 return 0;
 447
 448         if (gtt->userptr) {
 449                 radeon_ttm_tt_pin_userptr(bdev, ttm);
 450                 flags &= ~RADEON_GART_PAGE_WRITE;
 451         }
 452
 453         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 454         if (!ttm->num_pages) {
 455                 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
 456                      ttm->num_pages, bo_mem, ttm);
 457         }
 458         if (ttm->caching == ttm_cached)
 459                 flags |= RADEON_GART_PAGE_SNOOP;
 460         r = radeon_gart_bind(rdev, gtt->offset, ttm->num_pages,
 461                              ttm->pages, gtt->ttm.dma_address, flags);
 462         if (r) {
 463                 DRM_ERROR("failed to bind %u pages at 0x%08X\n",
 464                           ttm->num_pages, (unsigned)gtt->offset);
 465                 return r;
 466         }
 467         gtt->bound = true;
 468         return 0;
 469 }
 470
 471 static void radeon_ttm_backend_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
 472 {
 473         struct radeon_ttm_tt *gtt = (void *)ttm;
 474         struct radeon_device *rdev = radeon_get_rdev(bdev);
 475
 476         if (gtt->userptr)
 477                 radeon_ttm_tt_unpin_userptr(bdev, ttm);
 478
 479         if (!gtt->bound)
 480                 return;
 481
 482         radeon_gart_unbind(rdev, gtt->offset, ttm->num_pages);
 483
 484         gtt->bound = false;
 485 }
 486
 487 static void radeon_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 488 {
 489         struct radeon_ttm_tt *gtt = (void *)ttm;
 490
 491         radeon_ttm_backend_unbind(bdev, ttm);
 492         ttm_tt_destroy_common(bdev, ttm);
 493
 494         ttm_tt_fini(&gtt->ttm);
 495         kfree(gtt);
 496 }
 497
 498 static struct ttm_tt *radeon_ttm_tt_create(struct ttm_buffer_object *bo,
 499                                            uint32_t page_flags)
 500 {
 501         struct radeon_ttm_tt *gtt;
 502         enum ttm_caching caching;
 503         struct radeon_bo *rbo;
 504 #if IS_ENABLED(CONFIG_AGP)
 505         struct radeon_device *rdev = radeon_get_rdev(bo->bdev);
 506
 507         if (rdev->flags & RADEON_IS_AGP) {
 508                 return ttm_agp_tt_create(bo, rdev->agp->bridge, page_flags);
 509         }
 510 #endif
 511         rbo = container_of(bo, struct radeon_bo, tbo);
 512
 513         gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
 514         if (gtt == NULL) {
 515                 return NULL;
 516         }
 517
 518         if (rbo->flags & RADEON_GEM_GTT_UC)
 519                 caching = ttm_uncached;
 520         else if (rbo->flags & RADEON_GEM_GTT_WC)
 521                 caching = ttm_write_combined;
 522         else
 523                 caching = ttm_cached;
 524
 525         if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags, caching)) {
 526                 kfree(gtt);
 527                 return NULL;
 528         }
 529         return &gtt->ttm;
 530 }
 531
 532 static struct radeon_ttm_tt *radeon_ttm_tt_to_gtt(struct radeon_device *rdev,
 533                                                   struct ttm_tt *ttm)
 534 {
 535 #if IS_ENABLED(CONFIG_AGP)
 536         if (rdev->flags & RADEON_IS_AGP)
 537                 return NULL;
 538 #endif
 539
 540         if (!ttm)
 541                 return NULL;
 542         return container_of(ttm, struct radeon_ttm_tt, ttm);
 543 }
 544
 545 static int radeon_ttm_tt_populate(struct ttm_device *bdev,
 546                                   struct ttm_tt *ttm,
 547                                   struct ttm_operation_ctx *ctx)
 548 {
 549         struct radeon_device *rdev = radeon_get_rdev(bdev);
 550         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
 551         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 552
 553         if (gtt && gtt->userptr) {
 554                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
 555                 if (!ttm->sg)
 556                         return -ENOMEM;
 557
 558                 ttm->page_flags |= TTM_PAGE_FLAG_SG;
 559                 return 0;
 560         }
 561
 562         if (slave && ttm->sg) {
 563                 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 564                                                ttm->num_pages);
 565                 return 0;
 566         }
 567
 568         return ttm_pool_alloc(&rdev->mman.bdev.pool, ttm, ctx);
 569 }
 570
 571 static void radeon_ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
 572 {
 573         struct radeon_device *rdev = radeon_get_rdev(bdev);
 574         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
 575         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
 576
 577         if (gtt && gtt->userptr) {
 578                 kfree(ttm->sg);
 579                 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
 580                 return;
 581         }
 582
 583         if (slave)
 584                 return;
 585
 586         return ttm_pool_free(&rdev->mman.bdev.pool, ttm);
 587 }
 588
 589 int radeon_ttm_tt_set_userptr(struct radeon_device *rdev,
 590                               struct ttm_tt *ttm, uint64_t addr,
 591                               uint32_t flags)
 592 {
 593         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
 594
 595         if (gtt == NULL)
 596                 return -EINVAL;
 597
 598         gtt->userptr = addr;
 599         gtt->usermm = current->mm;
 600         gtt->userflags = flags;
 601         return 0;
 602 }
 603
 604 bool radeon_ttm_tt_is_bound(struct ttm_device *bdev,
 605                             struct ttm_tt *ttm)
 606 {
 607 #if IS_ENABLED(CONFIG_AGP)
 608         struct radeon_device *rdev = radeon_get_rdev(bdev);
 609         if (rdev->flags & RADEON_IS_AGP)
 610                 return ttm_agp_is_bound(ttm);
 611 #endif
 612         return radeon_ttm_backend_is_bound(ttm);
 613 }
 614
 615 static int radeon_ttm_tt_bind(struct ttm_device *bdev,
 616                               struct ttm_tt *ttm,
 617                               struct ttm_resource *bo_mem)
 618 {
 619 #if IS_ENABLED(CONFIG_AGP)
 620         struct radeon_device *rdev = radeon_get_rdev(bdev);
 621 #endif
 622
 623         if (!bo_mem)
 624                 return -EINVAL;
 625 #if IS_ENABLED(CONFIG_AGP)
 626         if (rdev->flags & RADEON_IS_AGP)
 627                 return ttm_agp_bind(ttm, bo_mem);
 628 #endif
 629
 630         return radeon_ttm_backend_bind(bdev, ttm, bo_mem);
 631 }
 632
 633 static void radeon_ttm_tt_unbind(struct ttm_device *bdev,
 634                                  struct ttm_tt *ttm)
 635 {
 636 #if IS_ENABLED(CONFIG_AGP)
 637         struct radeon_device *rdev = radeon_get_rdev(bdev);
 638
 639         if (rdev->flags & RADEON_IS_AGP) {
 640                 ttm_agp_unbind(ttm);
 641                 return;
 642         }
 643 #endif
 644         radeon_ttm_backend_unbind(bdev, ttm);
 645 }
 646
 647 static void radeon_ttm_tt_destroy(struct ttm_device *bdev,
 648                                   struct ttm_tt *ttm)
 649 {
 650 #if IS_ENABLED(CONFIG_AGP)
 651         struct radeon_device *rdev = radeon_get_rdev(bdev);
 652
 653         if (rdev->flags & RADEON_IS_AGP) {
 654                 ttm_agp_unbind(ttm);
 655                 ttm_tt_destroy_common(bdev, ttm);
 656                 ttm_agp_destroy(ttm);
 657                 return;
 658         }
 659 #endif
 660         radeon_ttm_backend_destroy(bdev, ttm);
 661 }
 662
 663 bool radeon_ttm_tt_has_userptr(struct radeon_device *rdev,
 664                                struct ttm_tt *ttm)
 665 {
 666         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
 667
 668         if (gtt == NULL)
 669                 return false;
 670
 671         return !!gtt->userptr;
 672 }
 673
 674 bool radeon_ttm_tt_is_readonly(struct radeon_device *rdev,
 675                                struct ttm_tt *ttm)
 676 {
 677         struct radeon_ttm_tt *gtt = radeon_ttm_tt_to_gtt(rdev, ttm);
 678
 679         if (gtt == NULL)
 680                 return false;
 681
 682         return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 683 }
 684
 685 static void
 686 radeon_bo_delete_mem_notify(struct ttm_buffer_object *bo)
 687 {
 688         unsigned int old_type = TTM_PL_SYSTEM;
 689
 690         if (bo->resource)
 691                 old_type = bo->resource->mem_type;
 692         radeon_bo_move_notify(bo, old_type, NULL);
 693 }
 694
 695 static struct ttm_device_funcs radeon_bo_driver = {
 696         .ttm_tt_create = &radeon_ttm_tt_create,
 697         .ttm_tt_populate = &radeon_ttm_tt_populate,
 698         .ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
 699         .ttm_tt_destroy = &radeon_ttm_tt_destroy,
 700         .eviction_valuable = ttm_bo_eviction_valuable,
 701         .evict_flags = &radeon_evict_flags,
 702         .move = &radeon_bo_move,
 703         .delete_mem_notify = &radeon_bo_delete_mem_notify,
 704         .io_mem_reserve = &radeon_ttm_io_mem_reserve,
 705 };
 706
 707 int radeon_ttm_init(struct radeon_device *rdev)
 708 {
 709         int r;
 710
 711         /* No others user of address space so set it to 0 */
 712         r = ttm_device_init(&rdev->mman.bdev, &radeon_bo_driver, rdev->dev,
 713                                rdev->ddev->anon_inode->i_mapping,
 714                                rdev->ddev->vma_offset_manager,
 715                                rdev->need_swiotlb,
 716                                dma_addressing_limited(&rdev->pdev->dev));
 717         if (r) {
 718                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 719                 return r;
 720         }
 721         rdev->mman.initialized = true;
 722
 723         r = radeon_ttm_init_vram(rdev);
 724         if (r) {
 725                 DRM_ERROR("Failed initializing VRAM heap.\n");
 726                 return r;
 727         }
 728         /* Change the size here instead of the init above so only lpfn is affected */
 729         radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
 730
 731         r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
 732                              RADEON_GEM_DOMAIN_VRAM, 0, NULL,
 733                              NULL, &rdev->stolen_vga_memory);
 734         if (r) {
 735                 return r;
 736         }
 737         r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
 738         if (r)
 739                 return r;
 740         r = radeon_bo_pin(rdev->stolen_vga_memory, RADEON_GEM_DOMAIN_VRAM, NULL);
 741         radeon_bo_unreserve(rdev->stolen_vga_memory);
 742         if (r) {
 743                 radeon_bo_unref(&rdev->stolen_vga_memory);
 744                 return r;
 745         }
 746         DRM_INFO("radeon: %uM of VRAM memory ready\n",
 747                  (unsigned) (rdev->mc.real_vram_size / (1024 * 1024)));
 748
 749         r = radeon_ttm_init_gtt(rdev);
 750         if (r) {
 751                 DRM_ERROR("Failed initializing GTT heap.\n");
 752                 return r;
 753         }
 754         DRM_INFO("radeon: %uM of GTT memory ready.\n",
 755                  (unsigned)(rdev->mc.gtt_size / (1024 * 1024)));
 756
 757         radeon_ttm_debugfs_init(rdev);
 758
 759         return 0;
 760 }
 761
 762 void radeon_ttm_fini(struct radeon_device *rdev)
 763 {
 764         int r;
 765
 766         if (!rdev->mman.initialized)
 767                 return;
 768
 769         if (rdev->stolen_vga_memory) {
 770                 r = radeon_bo_reserve(rdev->stolen_vga_memory, false);
 771                 if (r == 0) {
 772                         radeon_bo_unpin(rdev->stolen_vga_memory);
 773                         radeon_bo_unreserve(rdev->stolen_vga_memory);
 774                 }
 775                 radeon_bo_unref(&rdev->stolen_vga_memory);
 776         }
 777         ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_VRAM);
 778         ttm_range_man_fini(&rdev->mman.bdev, TTM_PL_TT);
 779         ttm_device_fini(&rdev->mman.bdev);
 780         radeon_gart_fini(rdev);
 781         rdev->mman.initialized = false;
 782         DRM_INFO("radeon: ttm finalized\n");
 783 }
 784
 785 /* this should only be called at bootup or when userspace
 786  * isn't running */
 787 void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
 788 {
 789         struct ttm_resource_manager *man;
 790
 791         if (!rdev->mman.initialized)
 792                 return;
 793
 794         man = ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM);
 795         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
 796         man->size = size >> PAGE_SHIFT;
 797 }
 798
 799 #if defined(CONFIG_DEBUG_FS)
 800
 801 static int radeon_mm_vram_dump_table_show(struct seq_file *m, void *unused)
 802 {
 803         struct radeon_device *rdev = (struct radeon_device *)m->private;
 804         struct ttm_resource_manager *man = ttm_manager_type(&rdev->mman.bdev,
 805                                                             TTM_PL_VRAM);
 806         struct drm_printer p = drm_seq_file_printer(m);
 807
 808         man->func->debug(man, &p);
 809         return 0;
 810 }
 811
 812 static int radeon_ttm_page_pool_show(struct seq_file *m, void *data)
 813 {
 814         struct radeon_device *rdev = (struct radeon_device *)m->private;
 815
 816         return ttm_pool_debugfs(&rdev->mman.bdev.pool, m);
 817 }
 818
 819 static int radeon_mm_gtt_dump_table_show(struct seq_file *m, void *unused)
 820 {
 821         struct radeon_device *rdev = (struct radeon_device *)m->private;
 822         struct ttm_resource_manager *man = ttm_manager_type(&rdev->mman.bdev,
 823                                                             TTM_PL_TT);
 824         struct drm_printer p = drm_seq_file_printer(m);
 825
 826         man->func->debug(man, &p);
 827         return 0;
 828 }
 829
 830 DEFINE_SHOW_ATTRIBUTE(radeon_mm_vram_dump_table);
 831 DEFINE_SHOW_ATTRIBUTE(radeon_mm_gtt_dump_table);
 832 DEFINE_SHOW_ATTRIBUTE(radeon_ttm_page_pool);
 833
 834 static int radeon_ttm_vram_open(struct inode *inode, struct file *filep)
 835 {
 836         struct radeon_device *rdev = inode->i_private;
 837         i_size_write(inode, rdev->mc.mc_vram_size);
 838         filep->private_data = inode->i_private;
 839         return 0;
 840 }
 841
 842 static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
 843                                     size_t size, loff_t *pos)
 844 {
 845         struct radeon_device *rdev = f->private_data;
 846         ssize_t result = 0;
 847         int r;
 848
 849         if (size & 0x3 || *pos & 0x3)
 850                 return -EINVAL;
 851
 852         while (size) {
 853                 unsigned long flags;
 854                 uint32_t value;
 855
 856                 if (*pos >= rdev->mc.mc_vram_size)
 857                         return result;
 858
 859                 spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
 860                 WREG32(RADEON_MM_INDEX, ((uint32_t)*pos) | 0x80000000);
 861                 if (rdev->family >= CHIP_CEDAR)
 862                         WREG32(EVERGREEN_MM_INDEX_HI, *pos >> 31);
 863                 value = RREG32(RADEON_MM_DATA);
 864                 spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
 865
 866                 r = put_user(value, (uint32_t __user *)buf);
 867                 if (r)
 868                         return r;
 869
 870                 result += 4;
 871                 buf += 4;
 872                 *pos += 4;
 873                 size -= 4;
 874         }
 875
 876         return result;
 877 }
 878
 879 static const struct file_operations radeon_ttm_vram_fops = {
 880         .owner = THIS_MODULE,
 881         .open = radeon_ttm_vram_open,
 882         .read = radeon_ttm_vram_read,
 883         .llseek = default_llseek
 884 };
 885
 886 static int radeon_ttm_gtt_open(struct inode *inode, struct file *filep)
 887 {
 888         struct radeon_device *rdev = inode->i_private;
 889         i_size_write(inode, rdev->mc.gtt_size);
 890         filep->private_data = inode->i_private;
 891         return 0;
 892 }
 893
 894 static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,
 895                                    size_t size, loff_t *pos)
 896 {
 897         struct radeon_device *rdev = f->private_data;
 898         ssize_t result = 0;
 899         int r;
 900
 901         while (size) {
 902                 loff_t p = *pos / PAGE_SIZE;
 903                 unsigned off = *pos & ~PAGE_MASK;
 904                 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
 905                 struct page *page;
 906                 void *ptr;
 907
 908                 if (p >= rdev->gart.num_cpu_pages)
 909                         return result;
 910
 911                 page = rdev->gart.pages[p];
 912                 if (page) {
 913                         ptr = kmap(page);
 914                         ptr += off;
 915
 916                         r = copy_to_user(buf, ptr, cur_size);
 917                         kunmap(rdev->gart.pages[p]);
 918                 } else
 919                         r = clear_user(buf, cur_size);
 920
 921                 if (r)
 922                         return -EFAULT;
 923
 924                 result += cur_size;
 925                 buf += cur_size;
 926                 *pos += cur_size;
 927                 size -= cur_size;
 928         }
 929
 930         return result;
 931 }
 932
 933 static const struct file_operations radeon_ttm_gtt_fops = {
 934         .owner = THIS_MODULE,
 935         .open = radeon_ttm_gtt_open,
 936         .read = radeon_ttm_gtt_read,
 937         .llseek = default_llseek
 938 };
 939
 940 #endif
 941
 942 static void radeon_ttm_debugfs_init(struct radeon_device *rdev)
 943 {
 944 #if defined(CONFIG_DEBUG_FS)
 945         struct drm_minor *minor = rdev->ddev->primary;
 946         struct dentry *root = minor->debugfs_root;
 947
 948         debugfs_create_file("radeon_vram", 0444, root, rdev,
 949                             &radeon_ttm_vram_fops);
 950
 951         debugfs_create_file("radeon_gtt", 0444, root, rdev,
 952                             &radeon_ttm_gtt_fops);
 953
 954         debugfs_create_file("radeon_vram_mm", 0444, root, rdev,
 955                             &radeon_mm_vram_dump_table_fops);
 956         debugfs_create_file("radeon_gtt_mm", 0444, root, rdev,
 957                             &radeon_mm_gtt_dump_table_fops);
 958         debugfs_create_file("ttm_page_pool", 0444, root, rdev,
 959                             &radeon_ttm_page_pool_fops);
 960 #endif
 961 }