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