drivers/gpu/drm/amd/amdgpu/amdgpu_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 <[email protected]>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32 #include <drm/ttm/ttm_bo_api.h>
  33 #include <drm/ttm/ttm_bo_driver.h>
  34 #include <drm/ttm/ttm_placement.h>
  35 #include <drm/ttm/ttm_module.h>
  36 #include <drm/ttm/ttm_page_alloc.h>
  37 #include <drm/drmP.h>
  38 #include <drm/amdgpu_drm.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/slab.h>
  41 #include <linux/swiotlb.h>
  42 #include <linux/swap.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/debugfs.h>
  45 #include <linux/iommu.h>
  46 #include "amdgpu.h"
  47 #include "amdgpu_object.h"
  48 #include "amdgpu_trace.h"
  49 #include "amdgpu_amdkfd.h"
  50 #include "amdgpu_sdma.h"
  51 #include "bif/bif_4_1_d.h"
  52
  53 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
  54
  55 static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
  56                              struct ttm_mem_reg *mem, unsigned num_pages,
  57                              uint64_t offset, unsigned window,
  58                              struct amdgpu_ring *ring,
  59                              uint64_t *addr);
  60
  61 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
  62 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev);
  63
  64 static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
  65 {
  66         return 0;
  67 }
  68
  69 /**
  70  * amdgpu_init_mem_type - Initialize a memory manager for a specific type of
  71  * memory request.
  72  *
  73  * @bdev: The TTM BO device object (contains a reference to amdgpu_device)
  74  * @type: The type of memory requested
  75  * @man: The memory type manager for each domain
  76  *
  77  * This is called by ttm_bo_init_mm() when a buffer object is being
  78  * initialized.
  79  */
  80 static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  81                                 struct ttm_mem_type_manager *man)
  82 {
  83         struct amdgpu_device *adev;
  84
  85         adev = amdgpu_ttm_adev(bdev);
  86
  87         switch (type) {
  88         case TTM_PL_SYSTEM:
  89                 /* System memory */
  90                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
  91                 man->available_caching = TTM_PL_MASK_CACHING;
  92                 man->default_caching = TTM_PL_FLAG_CACHED;
  93                 break;
  94         case TTM_PL_TT:
  95                 /* GTT memory  */
  96                 man->func = &amdgpu_gtt_mgr_func;
  97                 man->gpu_offset = adev->gmc.gart_start;
  98                 man->available_caching = TTM_PL_MASK_CACHING;
  99                 man->default_caching = TTM_PL_FLAG_CACHED;
 100                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
 101                 break;
 102         case TTM_PL_VRAM:
 103                 /* "On-card" video ram */
 104                 man->func = &amdgpu_vram_mgr_func;
 105                 man->gpu_offset = adev->gmc.vram_start;
 106                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 107                              TTM_MEMTYPE_FLAG_MAPPABLE;
 108                 man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
 109                 man->default_caching = TTM_PL_FLAG_WC;
 110                 break;
 111         case AMDGPU_PL_GDS:
 112         case AMDGPU_PL_GWS:
 113         case AMDGPU_PL_OA:
 114                 /* On-chip GDS memory*/
 115                 man->func = &ttm_bo_manager_func;
 116                 man->gpu_offset = 0;
 117                 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_CMA;
 118                 man->available_caching = TTM_PL_FLAG_UNCACHED;
 119                 man->default_caching = TTM_PL_FLAG_UNCACHED;
 120                 break;
 121         default:
 122                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 123                 return -EINVAL;
 124         }
 125         return 0;
 126 }
 127
 128 /**
 129  * amdgpu_evict_flags - Compute placement flags
 130  *
 131  * @bo: The buffer object to evict
 132  * @placement: Possible destination(s) for evicted BO
 133  *
 134  * Fill in placement data when ttm_bo_evict() is called
 135  */
 136 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 137                                 struct ttm_placement *placement)
 138 {
 139         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 140         struct amdgpu_bo *abo;
 141         static const struct ttm_place placements = {
 142                 .fpfn = 0,
 143                 .lpfn = 0,
 144                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 145         };
 146
 147         /* Don't handle scatter gather BOs */
 148         if (bo->type == ttm_bo_type_sg) {
 149                 placement->num_placement = 0;
 150                 placement->num_busy_placement = 0;
 151                 return;
 152         }
 153
 154         /* Object isn't an AMDGPU object so ignore */
 155         if (!amdgpu_bo_is_amdgpu_bo(bo)) {
 156                 placement->placement = &placements;
 157                 placement->busy_placement = &placements;
 158                 placement->num_placement = 1;
 159                 placement->num_busy_placement = 1;
 160                 return;
 161         }
 162
 163         abo = ttm_to_amdgpu_bo(bo);
 164         switch (bo->mem.mem_type) {
 165         case AMDGPU_PL_GDS:
 166         case AMDGPU_PL_GWS:
 167         case AMDGPU_PL_OA:
 168                 placement->num_placement = 0;
 169                 placement->num_busy_placement = 0;
 170                 return;
 171
 172         case TTM_PL_VRAM:
 173                 if (!adev->mman.buffer_funcs_enabled) {
 174                         /* Move to system memory */
 175                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 176                 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 177                            !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 178                            amdgpu_bo_in_cpu_visible_vram(abo)) {
 179
 180                         /* Try evicting to the CPU inaccessible part of VRAM
 181                          * first, but only set GTT as busy placement, so this
 182                          * BO will be evicted to GTT rather than causing other
 183                          * BOs to be evicted from VRAM
 184                          */
 185                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
 186                                                          AMDGPU_GEM_DOMAIN_GTT);
 187                         abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 188                         abo->placements[0].lpfn = 0;
 189                         abo->placement.busy_placement = &abo->placements[1];
 190                         abo->placement.num_busy_placement = 1;
 191                 } else {
 192                         /* Move to GTT memory */
 193                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
 194                 }
 195                 break;
 196         case TTM_PL_TT:
 197         default:
 198                 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 199                 break;
 200         }
 201         *placement = abo->placement;
 202 }
 203
 204 /**
 205  * amdgpu_verify_access - Verify access for a mmap call
 206  *
 207  * @bo: The buffer object to map
 208  * @filp: The file pointer from the process performing the mmap
 209  *
 210  * This is called by ttm_bo_mmap() to verify whether a process
 211  * has the right to mmap a BO to their process space.
 212  */
 213 static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 214 {
 215         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 216
 217         /*
 218          * Don't verify access for KFD BOs. They don't have a GEM
 219          * object associated with them.
 220          */
 221         if (abo->kfd_bo)
 222                 return 0;
 223
 224         if (amdgpu_ttm_tt_get_usermm(bo->ttm))
 225                 return -EPERM;
 226         return drm_vma_node_verify_access(&abo->gem_base.vma_node,
 227                                           filp->private_data);
 228 }
 229
 230 /**
 231  * amdgpu_move_null - Register memory for a buffer object
 232  *
 233  * @bo: The bo to assign the memory to
 234  * @new_mem: The memory to be assigned.
 235  *
 236  * Assign the memory from new_mem to the memory of the buffer object bo.
 237  */
 238 static void amdgpu_move_null(struct ttm_buffer_object *bo,
 239                              struct ttm_mem_reg *new_mem)
 240 {
 241         struct ttm_mem_reg *old_mem = &bo->mem;
 242
 243         BUG_ON(old_mem->mm_node != NULL);
 244         *old_mem = *new_mem;
 245         new_mem->mm_node = NULL;
 246 }
 247
 248 /**
 249  * amdgpu_mm_node_addr - Compute the GPU relative offset of a GTT buffer.
 250  *
 251  * @bo: The bo to assign the memory to.
 252  * @mm_node: Memory manager node for drm allocator.
 253  * @mem: The region where the bo resides.
 254  *
 255  */
 256 static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
 257                                     struct drm_mm_node *mm_node,
 258                                     struct ttm_mem_reg *mem)
 259 {
 260         uint64_t addr = 0;
 261
 262         if (mm_node->start != AMDGPU_BO_INVALID_OFFSET) {
 263                 addr = mm_node->start << PAGE_SHIFT;
 264                 addr += bo->bdev->man[mem->mem_type].gpu_offset;
 265         }
 266         return addr;
 267 }
 268
 269 /**
 270  * amdgpu_find_mm_node - Helper function finds the drm_mm_node corresponding to
 271  * @offset. It also modifies the offset to be within the drm_mm_node returned
 272  *
 273  * @mem: The region where the bo resides.
 274  * @offset: The offset that drm_mm_node is used for finding.
 275  *
 276  */
 277 static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
 278                                                unsigned long *offset)
 279 {
 280         struct drm_mm_node *mm_node = mem->mm_node;
 281
 282         while (*offset >= (mm_node->size << PAGE_SHIFT)) {
 283                 *offset -= (mm_node->size << PAGE_SHIFT);
 284                 ++mm_node;
 285         }
 286         return mm_node;
 287 }
 288
 289 /**
 290  * amdgpu_copy_ttm_mem_to_mem - Helper function for copy
 291  *
 292  * The function copies @size bytes from {src->mem + src->offset} to
 293  * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
 294  * move and different for a BO to BO copy.
 295  *
 296  * @f: Returns the last fence if multiple jobs are submitted.
 297  */
 298 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 299                                struct amdgpu_copy_mem *src,
 300                                struct amdgpu_copy_mem *dst,
 301                                uint64_t size,
 302                                struct reservation_object *resv,
 303                                struct dma_fence **f)
 304 {
 305         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
 306         struct drm_mm_node *src_mm, *dst_mm;
 307         uint64_t src_node_start, dst_node_start, src_node_size,
 308                  dst_node_size, src_page_offset, dst_page_offset;
 309         struct dma_fence *fence = NULL;
 310         int r = 0;
 311         const uint64_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
 312                                         AMDGPU_GPU_PAGE_SIZE);
 313
 314         if (!adev->mman.buffer_funcs_enabled) {
 315                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 316                 return -EINVAL;
 317         }
 318
 319         src_mm = amdgpu_find_mm_node(src->mem, &src->offset);
 320         src_node_start = amdgpu_mm_node_addr(src->bo, src_mm, src->mem) +
 321                                              src->offset;
 322         src_node_size = (src_mm->size << PAGE_SHIFT) - src->offset;
 323         src_page_offset = src_node_start & (PAGE_SIZE - 1);
 324
 325         dst_mm = amdgpu_find_mm_node(dst->mem, &dst->offset);
 326         dst_node_start = amdgpu_mm_node_addr(dst->bo, dst_mm, dst->mem) +
 327                                              dst->offset;
 328         dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst->offset;
 329         dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
 330
 331         mutex_lock(&adev->mman.gtt_window_lock);
 332
 333         while (size) {
 334                 unsigned long cur_size;
 335                 uint64_t from = src_node_start, to = dst_node_start;
 336                 struct dma_fence *next;
 337
 338                 /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
 339                  * begins at an offset, then adjust the size accordingly
 340                  */
 341                 cur_size = min3(min(src_node_size, dst_node_size), size,
 342                                 GTT_MAX_BYTES);
 343                 if (cur_size + src_page_offset > GTT_MAX_BYTES ||
 344                     cur_size + dst_page_offset > GTT_MAX_BYTES)
 345                         cur_size -= max(src_page_offset, dst_page_offset);
 346
 347                 /* Map only what needs to be accessed. Map src to window 0 and
 348                  * dst to window 1
 349                  */
 350                 if (src->mem->start == AMDGPU_BO_INVALID_OFFSET) {
 351                         r = amdgpu_map_buffer(src->bo, src->mem,
 352                                         PFN_UP(cur_size + src_page_offset),
 353                                         src_node_start, 0, ring,
 354                                         &from);
 355                         if (r)
 356                                 goto error;
 357                         /* Adjust the offset because amdgpu_map_buffer returns
 358                          * start of mapped page
 359                          */
 360                         from += src_page_offset;
 361                 }
 362
 363                 if (dst->mem->start == AMDGPU_BO_INVALID_OFFSET) {
 364                         r = amdgpu_map_buffer(dst->bo, dst->mem,
 365                                         PFN_UP(cur_size + dst_page_offset),
 366                                         dst_node_start, 1, ring,
 367                                         &to);
 368                         if (r)
 369                                 goto error;
 370                         to += dst_page_offset;
 371                 }
 372
 373                 r = amdgpu_copy_buffer(ring, from, to, cur_size,
 374                                        resv, &next, false, true);
 375                 if (r)
 376                         goto error;
 377
 378                 dma_fence_put(fence);
 379                 fence = next;
 380
 381                 size -= cur_size;
 382                 if (!size)
 383                         break;
 384
 385                 src_node_size -= cur_size;
 386                 if (!src_node_size) {
 387                         src_node_start = amdgpu_mm_node_addr(src->bo, ++src_mm,
 388                                                              src->mem);
 389                         src_node_size = (src_mm->size << PAGE_SHIFT);
 390                 } else {
 391                         src_node_start += cur_size;
 392                         src_page_offset = src_node_start & (PAGE_SIZE - 1);
 393                 }
 394                 dst_node_size -= cur_size;
 395                 if (!dst_node_size) {
 396                         dst_node_start = amdgpu_mm_node_addr(dst->bo, ++dst_mm,
 397                                                              dst->mem);
 398                         dst_node_size = (dst_mm->size << PAGE_SHIFT);
 399                 } else {
 400                         dst_node_start += cur_size;
 401                         dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
 402                 }
 403         }
 404 error:
 405         mutex_unlock(&adev->mman.gtt_window_lock);
 406         if (f)
 407                 *f = dma_fence_get(fence);
 408         dma_fence_put(fence);
 409         return r;
 410 }
 411
 412 /**
 413  * amdgpu_move_blit - Copy an entire buffer to another buffer
 414  *
 415  * This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to
 416  * help move buffers to and from VRAM.
 417  */
 418 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 419                             bool evict, bool no_wait_gpu,
 420                             struct ttm_mem_reg *new_mem,
 421                             struct ttm_mem_reg *old_mem)
 422 {
 423         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 424         struct amdgpu_copy_mem src, dst;
 425         struct dma_fence *fence = NULL;
 426         int r;
 427
 428         src.bo = bo;
 429         dst.bo = bo;
 430         src.mem = old_mem;
 431         dst.mem = new_mem;
 432         src.offset = 0;
 433         dst.offset = 0;
 434
 435         r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
 436                                        new_mem->num_pages << PAGE_SHIFT,
 437                                        bo->resv, &fence);
 438         if (r)
 439                 goto error;
 440
 441         /* Always block for VM page tables before committing the new location */
 442         if (bo->type == ttm_bo_type_kernel)
 443                 r = ttm_bo_move_accel_cleanup(bo, fence, true, new_mem);
 444         else
 445                 r = ttm_bo_pipeline_move(bo, fence, evict, new_mem);
 446         dma_fence_put(fence);
 447         return r;
 448
 449 error:
 450         if (fence)
 451                 dma_fence_wait(fence, false);
 452         dma_fence_put(fence);
 453         return r;
 454 }
 455
 456 /**
 457  * amdgpu_move_vram_ram - Copy VRAM buffer to RAM buffer
 458  *
 459  * Called by amdgpu_bo_move().
 460  */
 461 static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict,
 462                                 struct ttm_operation_ctx *ctx,
 463                                 struct ttm_mem_reg *new_mem)
 464 {
 465         struct amdgpu_device *adev;
 466         struct ttm_mem_reg *old_mem = &bo->mem;
 467         struct ttm_mem_reg tmp_mem;
 468         struct ttm_place placements;
 469         struct ttm_placement placement;
 470         int r;
 471
 472         adev = amdgpu_ttm_adev(bo->bdev);
 473
 474         /* create space/pages for new_mem in GTT space */
 475         tmp_mem = *new_mem;
 476         tmp_mem.mm_node = NULL;
 477         placement.num_placement = 1;
 478         placement.placement = &placements;
 479         placement.num_busy_placement = 1;
 480         placement.busy_placement = &placements;
 481         placements.fpfn = 0;
 482         placements.lpfn = 0;
 483         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 484         r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
 485         if (unlikely(r)) {
 486                 return r;
 487         }
 488
 489         /* set caching flags */
 490         r = ttm_tt_set_placement_caching(bo->ttm, tmp_mem.placement);
 491         if (unlikely(r)) {
 492                 goto out_cleanup;
 493         }
 494
 495         /* Bind the memory to the GTT space */
 496         r = ttm_tt_bind(bo->ttm, &tmp_mem, ctx);
 497         if (unlikely(r)) {
 498                 goto out_cleanup;
 499         }
 500
 501         /* blit VRAM to GTT */
 502         r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu, &tmp_mem, old_mem);
 503         if (unlikely(r)) {
 504                 goto out_cleanup;
 505         }
 506
 507         /* move BO (in tmp_mem) to new_mem */
 508         r = ttm_bo_move_ttm(bo, ctx, new_mem);
 509 out_cleanup:
 510         ttm_bo_mem_put(bo, &tmp_mem);
 511         return r;
 512 }
 513
 514 /**
 515  * amdgpu_move_ram_vram - Copy buffer from RAM to VRAM
 516  *
 517  * Called by amdgpu_bo_move().
 518  */
 519 static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict,
 520                                 struct ttm_operation_ctx *ctx,
 521                                 struct ttm_mem_reg *new_mem)
 522 {
 523         struct amdgpu_device *adev;
 524         struct ttm_mem_reg *old_mem = &bo->mem;
 525         struct ttm_mem_reg tmp_mem;
 526         struct ttm_placement placement;
 527         struct ttm_place placements;
 528         int r;
 529
 530         adev = amdgpu_ttm_adev(bo->bdev);
 531
 532         /* make space in GTT for old_mem buffer */
 533         tmp_mem = *new_mem;
 534         tmp_mem.mm_node = NULL;
 535         placement.num_placement = 1;
 536         placement.placement = &placements;
 537         placement.num_busy_placement = 1;
 538         placement.busy_placement = &placements;
 539         placements.fpfn = 0;
 540         placements.lpfn = 0;
 541         placements.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
 542         r = ttm_bo_mem_space(bo, &placement, &tmp_mem, ctx);
 543         if (unlikely(r)) {
 544                 return r;
 545         }
 546
 547         /* move/bind old memory to GTT space */
 548         r = ttm_bo_move_ttm(bo, ctx, &tmp_mem);
 549         if (unlikely(r)) {
 550                 goto out_cleanup;
 551         }
 552
 553         /* copy to VRAM */
 554         r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu, new_mem, old_mem);
 555         if (unlikely(r)) {
 556                 goto out_cleanup;
 557         }
 558 out_cleanup:
 559         ttm_bo_mem_put(bo, &tmp_mem);
 560         return r;
 561 }
 562
 563 /**
 564  * amdgpu_bo_move - Move a buffer object to a new memory location
 565  *
 566  * Called by ttm_bo_handle_move_mem()
 567  */
 568 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
 569                           struct ttm_operation_ctx *ctx,
 570                           struct ttm_mem_reg *new_mem)
 571 {
 572         struct amdgpu_device *adev;
 573         struct amdgpu_bo *abo;
 574         struct ttm_mem_reg *old_mem = &bo->mem;
 575         int r;
 576
 577         /* Can't move a pinned BO */
 578         abo = ttm_to_amdgpu_bo(bo);
 579         if (WARN_ON_ONCE(abo->pin_count > 0))
 580                 return -EINVAL;
 581
 582         adev = amdgpu_ttm_adev(bo->bdev);
 583
 584         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 585                 amdgpu_move_null(bo, new_mem);
 586                 return 0;
 587         }
 588         if ((old_mem->mem_type == TTM_PL_TT &&
 589              new_mem->mem_type == TTM_PL_SYSTEM) ||
 590             (old_mem->mem_type == TTM_PL_SYSTEM &&
 591              new_mem->mem_type == TTM_PL_TT)) {
 592                 /* bind is enough */
 593                 amdgpu_move_null(bo, new_mem);
 594                 return 0;
 595         }
 596         if (old_mem->mem_type == AMDGPU_PL_GDS ||
 597             old_mem->mem_type == AMDGPU_PL_GWS ||
 598             old_mem->mem_type == AMDGPU_PL_OA ||
 599             new_mem->mem_type == AMDGPU_PL_GDS ||
 600             new_mem->mem_type == AMDGPU_PL_GWS ||
 601             new_mem->mem_type == AMDGPU_PL_OA) {
 602                 /* Nothing to save here */
 603                 amdgpu_move_null(bo, new_mem);
 604                 return 0;
 605         }
 606
 607         if (!adev->mman.buffer_funcs_enabled)
 608                 goto memcpy;
 609
 610         if (old_mem->mem_type == TTM_PL_VRAM &&
 611             new_mem->mem_type == TTM_PL_SYSTEM) {
 612                 r = amdgpu_move_vram_ram(bo, evict, ctx, new_mem);
 613         } else if (old_mem->mem_type == TTM_PL_SYSTEM &&
 614                    new_mem->mem_type == TTM_PL_VRAM) {
 615                 r = amdgpu_move_ram_vram(bo, evict, ctx, new_mem);
 616         } else {
 617                 r = amdgpu_move_blit(bo, evict, ctx->no_wait_gpu,
 618                                      new_mem, old_mem);
 619         }
 620
 621         if (r) {
 622 memcpy:
 623                 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
 624                 if (r) {
 625                         return r;
 626                 }
 627         }
 628
 629         if (bo->type == ttm_bo_type_device &&
 630             new_mem->mem_type == TTM_PL_VRAM &&
 631             old_mem->mem_type != TTM_PL_VRAM) {
 632                 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
 633                  * accesses the BO after it's moved.
 634                  */
 635                 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 636         }
 637
 638         /* update statistics */
 639         atomic64_add((u64)bo->num_pages << PAGE_SHIFT, &adev->num_bytes_moved);
 640         return 0;
 641 }
 642
 643 /**
 644  * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
 645  *
 646  * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
 647  */
 648 static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 649 {
 650         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 651         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 652         struct drm_mm_node *mm_node = mem->mm_node;
 653
 654         mem->bus.addr = NULL;
 655         mem->bus.offset = 0;
 656         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 657         mem->bus.base = 0;
 658         mem->bus.is_iomem = false;
 659         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 660                 return -EINVAL;
 661         switch (mem->mem_type) {
 662         case TTM_PL_SYSTEM:
 663                 /* system memory */
 664                 return 0;
 665         case TTM_PL_TT:
 666                 break;
 667         case TTM_PL_VRAM:
 668                 mem->bus.offset = mem->start << PAGE_SHIFT;
 669                 /* check if it's visible */
 670                 if ((mem->bus.offset + mem->bus.size) > adev->gmc.visible_vram_size)
 671                         return -EINVAL;
 672                 /* Only physically contiguous buffers apply. In a contiguous
 673                  * buffer, size of the first mm_node would match the number of
 674                  * pages in ttm_mem_reg.
 675                  */
 676                 if (adev->mman.aper_base_kaddr &&
 677                     (mm_node->size == mem->num_pages))
 678                         mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
 679                                         mem->bus.offset;
 680
 681                 mem->bus.base = adev->gmc.aper_base;
 682                 mem->bus.is_iomem = true;
 683                 break;
 684         default:
 685                 return -EINVAL;
 686         }
 687         return 0;
 688 }
 689
 690 static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 691 {
 692 }
 693
 694 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
 695                                            unsigned long page_offset)
 696 {
 697         struct drm_mm_node *mm;
 698         unsigned long offset = (page_offset << PAGE_SHIFT);
 699
 700         mm = amdgpu_find_mm_node(&bo->mem, &offset);
 701         return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start +
 702                 (offset >> PAGE_SHIFT);
 703 }
 704
 705 /*
 706  * TTM backend functions.
 707  */
 708 struct amdgpu_ttm_gup_task_list {
 709         struct list_head        list;
 710         struct task_struct      *task;
 711 };
 712
 713 struct amdgpu_ttm_tt {
 714         struct ttm_dma_tt       ttm;
 715         u64                     offset;
 716         uint64_t                userptr;
 717         struct task_struct      *usertask;
 718         uint32_t                userflags;
 719         spinlock_t              guptasklock;
 720         struct list_head        guptasks;
 721         atomic_t                mmu_invalidations;
 722         uint32_t                last_set_pages;
 723 };
 724
 725 /**
 726  * amdgpu_ttm_tt_get_user_pages - Pin pages of memory pointed to by a USERPTR
 727  * pointer to memory
 728  *
 729  * Called by amdgpu_gem_userptr_ioctl() and amdgpu_cs_parser_bos().
 730  * This provides a wrapper around the get_user_pages() call to provide
 731  * device accessible pages that back user memory.
 732  */
 733 int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
 734 {
 735         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 736         struct mm_struct *mm = gtt->usertask->mm;
 737         unsigned int flags = 0;
 738         unsigned pinned = 0;
 739         int r;
 740
 741         if (!mm) /* Happens during process shutdown */
 742                 return -ESRCH;
 743
 744         if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
 745                 flags |= FOLL_WRITE;
 746
 747         down_read(&mm->mmap_sem);
 748
 749         if (gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) {
 750                 /*
 751                  * check that we only use anonymous memory to prevent problems
 752                  * with writeback
 753                  */
 754                 unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
 755                 struct vm_area_struct *vma;
 756
 757                 vma = find_vma(mm, gtt->userptr);
 758                 if (!vma || vma->vm_file || vma->vm_end < end) {
 759                         up_read(&mm->mmap_sem);
 760                         return -EPERM;
 761                 }
 762         }
 763
 764         /* loop enough times using contiguous pages of memory */
 765         do {
 766                 unsigned num_pages = ttm->num_pages - pinned;
 767                 uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
 768                 struct page **p = pages + pinned;
 769                 struct amdgpu_ttm_gup_task_list guptask;
 770
 771                 guptask.task = current;
 772                 spin_lock(&gtt->guptasklock);
 773                 list_add(&guptask.list, &gtt->guptasks);
 774                 spin_unlock(&gtt->guptasklock);
 775
 776                 if (mm == current->mm)
 777                         r = get_user_pages(userptr, num_pages, flags, p, NULL);
 778                 else
 779                         r = get_user_pages_remote(gtt->usertask,
 780                                         mm, userptr, num_pages,
 781                                         flags, p, NULL, NULL);
 782
 783                 spin_lock(&gtt->guptasklock);
 784                 list_del(&guptask.list);
 785                 spin_unlock(&gtt->guptasklock);
 786
 787                 if (r < 0)
 788                         goto release_pages;
 789
 790                 pinned += r;
 791
 792         } while (pinned < ttm->num_pages);
 793
 794         up_read(&mm->mmap_sem);
 795         return 0;
 796
 797 release_pages:
 798         release_pages(pages, pinned);
 799         up_read(&mm->mmap_sem);
 800         return r;
 801 }
 802
 803 /**
 804  * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
 805  *
 806  * Called by amdgpu_cs_list_validate(). This creates the page list
 807  * that backs user memory and will ultimately be mapped into the device
 808  * address space.
 809  */
 810 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
 811 {
 812         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 813         unsigned i;
 814
 815         gtt->last_set_pages = atomic_read(&gtt->mmu_invalidations);
 816         for (i = 0; i < ttm->num_pages; ++i) {
 817                 if (ttm->pages[i])
 818                         put_page(ttm->pages[i]);
 819
 820                 ttm->pages[i] = pages ? pages[i] : NULL;
 821         }
 822 }
 823
 824 /**
 825  * amdgpu_ttm_tt_mark_user_page - Mark pages as dirty
 826  *
 827  * Called while unpinning userptr pages
 828  */
 829 void amdgpu_ttm_tt_mark_user_pages(struct ttm_tt *ttm)
 830 {
 831         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 832         unsigned i;
 833
 834         for (i = 0; i < ttm->num_pages; ++i) {
 835                 struct page *page = ttm->pages[i];
 836
 837                 if (!page)
 838                         continue;
 839
 840                 if (!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY))
 841                         set_page_dirty(page);
 842
 843                 mark_page_accessed(page);
 844         }
 845 }
 846
 847 /**
 848  * amdgpu_ttm_tt_pin_userptr -  prepare the sg table with the user pages
 849  *
 850  * Called by amdgpu_ttm_backend_bind()
 851  **/
 852 static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
 853 {
 854         struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
 855         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 856         unsigned nents;
 857         int r;
 858
 859         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 860         enum dma_data_direction direction = write ?
 861                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 862
 863         /* Allocate an SG array and squash pages into it */
 864         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 865                                       ttm->num_pages << PAGE_SHIFT,
 866                                       GFP_KERNEL);
 867         if (r)
 868                 goto release_sg;
 869
 870         /* Map SG to device */
 871         r = -ENOMEM;
 872         nents = dma_map_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 873         if (nents != ttm->sg->nents)
 874                 goto release_sg;
 875
 876         /* convert SG to linear array of pages and dma addresses */
 877         drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
 878                                          gtt->ttm.dma_address, ttm->num_pages);
 879
 880         return 0;
 881
 882 release_sg:
 883         kfree(ttm->sg);
 884         return r;
 885 }
 886
 887 /**
 888  * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
 889  */
 890 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
 891 {
 892         struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
 893         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 894
 895         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 896         enum dma_data_direction direction = write ?
 897                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 898
 899         /* double check that we don't free the table twice */
 900         if (!ttm->sg->sgl)
 901                 return;
 902
 903         /* unmap the pages mapped to the device */
 904         dma_unmap_sg(adev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
 905
 906         /* mark the pages as dirty */
 907         amdgpu_ttm_tt_mark_user_pages(ttm);
 908
 909         sg_free_table(ttm->sg);
 910 }
 911
 912 int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
 913                                 struct ttm_buffer_object *tbo,
 914                                 uint64_t flags)
 915 {
 916         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
 917         struct ttm_tt *ttm = tbo->ttm;
 918         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 919         int r;
 920
 921         if (abo->flags & AMDGPU_GEM_CREATE_MQD_GFX9) {
 922                 uint64_t page_idx = 1;
 923
 924                 r = amdgpu_gart_bind(adev, gtt->offset, page_idx,
 925                                 ttm->pages, gtt->ttm.dma_address, flags);
 926                 if (r)
 927                         goto gart_bind_fail;
 928
 929                 /* Patch mtype of the second part BO */
 930                 flags &=  ~AMDGPU_PTE_MTYPE_MASK;
 931                 flags |= AMDGPU_PTE_MTYPE(AMDGPU_MTYPE_NC);
 932
 933                 r = amdgpu_gart_bind(adev,
 934                                 gtt->offset + (page_idx << PAGE_SHIFT),
 935                                 ttm->num_pages - page_idx,
 936                                 &ttm->pages[page_idx],
 937                                 &(gtt->ttm.dma_address[page_idx]), flags);
 938         } else {
 939                 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 940                                      ttm->pages, gtt->ttm.dma_address, flags);
 941         }
 942
 943 gart_bind_fail:
 944         if (r)
 945                 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
 946                           ttm->num_pages, gtt->offset);
 947
 948         return r;
 949 }
 950
 951 /**
 952  * amdgpu_ttm_backend_bind - Bind GTT memory
 953  *
 954  * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
 955  * This handles binding GTT memory to the device address space.
 956  */
 957 static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
 958                                    struct ttm_mem_reg *bo_mem)
 959 {
 960         struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
 961         struct amdgpu_ttm_tt *gtt = (void*)ttm;
 962         uint64_t flags;
 963         int r = 0;
 964
 965         if (gtt->userptr) {
 966                 r = amdgpu_ttm_tt_pin_userptr(ttm);
 967                 if (r) {
 968                         DRM_ERROR("failed to pin userptr\n");
 969                         return r;
 970                 }
 971         }
 972         if (!ttm->num_pages) {
 973                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 974                      ttm->num_pages, bo_mem, ttm);
 975         }
 976
 977         if (bo_mem->mem_type == AMDGPU_PL_GDS ||
 978             bo_mem->mem_type == AMDGPU_PL_GWS ||
 979             bo_mem->mem_type == AMDGPU_PL_OA)
 980                 return -EINVAL;
 981
 982         if (!amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
 983                 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
 984                 return 0;
 985         }
 986
 987         /* compute PTE flags relevant to this BO memory */
 988         flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
 989
 990         /* bind pages into GART page tables */
 991         gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
 992         r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 993                 ttm->pages, gtt->ttm.dma_address, flags);
 994
 995         if (r)
 996                 DRM_ERROR("failed to bind %lu pages at 0x%08llX\n",
 997                           ttm->num_pages, gtt->offset);
 998         return r;
 999 }
1000
1001 /**
1002  * amdgpu_ttm_alloc_gart - Allocate GART memory for buffer object
1003  */
1004 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
1005 {
1006         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1007         struct ttm_operation_ctx ctx = { false, false };
1008         struct amdgpu_ttm_tt *gtt = (void*)bo->ttm;
1009         struct ttm_mem_reg tmp;
1010         struct ttm_placement placement;
1011         struct ttm_place placements;
1012         uint64_t addr, flags;
1013         int r;
1014
1015         if (bo->mem.start != AMDGPU_BO_INVALID_OFFSET)
1016                 return 0;
1017
1018         addr = amdgpu_gmc_agp_addr(bo);
1019         if (addr != AMDGPU_BO_INVALID_OFFSET) {
1020                 bo->mem.start = addr >> PAGE_SHIFT;
1021         } else {
1022
1023                 /* allocate GART space */
1024                 tmp = bo->mem;
1025                 tmp.mm_node = NULL;
1026                 placement.num_placement = 1;
1027                 placement.placement = &placements;
1028                 placement.num_busy_placement = 1;
1029                 placement.busy_placement = &placements;
1030                 placements.fpfn = 0;
1031                 placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
1032                 placements.flags = (bo->mem.placement & ~TTM_PL_MASK_MEM) |
1033                         TTM_PL_FLAG_TT;
1034
1035                 r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
1036                 if (unlikely(r))
1037                         return r;
1038
1039                 /* compute PTE flags for this buffer object */
1040                 flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, &tmp);
1041
1042                 /* Bind pages */
1043                 gtt->offset = (u64)tmp.start << PAGE_SHIFT;
1044                 r = amdgpu_ttm_gart_bind(adev, bo, flags);
1045                 if (unlikely(r)) {
1046                         ttm_bo_mem_put(bo, &tmp);
1047                         return r;
1048                 }
1049
1050                 ttm_bo_mem_put(bo, &bo->mem);
1051                 bo->mem = tmp;
1052         }
1053
1054         bo->offset = (bo->mem.start << PAGE_SHIFT) +
1055                 bo->bdev->man[bo->mem.mem_type].gpu_offset;
1056
1057         return 0;
1058 }
1059
1060 /**
1061  * amdgpu_ttm_recover_gart - Rebind GTT pages
1062  *
1063  * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
1064  * rebind GTT pages during a GPU reset.
1065  */
1066 int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
1067 {
1068         struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
1069         uint64_t flags;
1070         int r;
1071
1072         if (!tbo->ttm)
1073                 return 0;
1074
1075         flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, &tbo->mem);
1076         r = amdgpu_ttm_gart_bind(adev, tbo, flags);
1077
1078         return r;
1079 }
1080
1081 /**
1082  * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
1083  *
1084  * Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
1085  * ttm_tt_destroy().
1086  */
1087 static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
1088 {
1089         struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
1090         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1091         int r;
1092
1093         /* if the pages have userptr pinning then clear that first */
1094         if (gtt->userptr)
1095                 amdgpu_ttm_tt_unpin_userptr(ttm);
1096
1097         if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
1098                 return 0;
1099
1100         /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
1101         r = amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
1102         if (r)
1103                 DRM_ERROR("failed to unbind %lu pages at 0x%08llX\n",
1104                           gtt->ttm.ttm.num_pages, gtt->offset);
1105         return r;
1106 }
1107
1108 static void amdgpu_ttm_backend_destroy(struct ttm_tt *ttm)
1109 {
1110         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1111
1112         if (gtt->usertask)
1113                 put_task_struct(gtt->usertask);
1114
1115         ttm_dma_tt_fini(&gtt->ttm);
1116         kfree(gtt);
1117 }
1118
1119 static struct ttm_backend_func amdgpu_backend_func = {
1120         .bind = &amdgpu_ttm_backend_bind,
1121         .unbind = &amdgpu_ttm_backend_unbind,
1122         .destroy = &amdgpu_ttm_backend_destroy,
1123 };
1124
1125 /**
1126  * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
1127  *
1128  * @bo: The buffer object to create a GTT ttm_tt object around
1129  *
1130  * Called by ttm_tt_create().
1131  */
1132 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
1133                                            uint32_t page_flags)
1134 {
1135         struct amdgpu_device *adev;
1136         struct amdgpu_ttm_tt *gtt;
1137
1138         adev = amdgpu_ttm_adev(bo->bdev);
1139
1140         gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
1141         if (gtt == NULL) {
1142                 return NULL;
1143         }
1144         gtt->ttm.ttm.func = &amdgpu_backend_func;
1145
1146         /* allocate space for the uninitialized page entries */
1147         if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags)) {
1148                 kfree(gtt);
1149                 return NULL;
1150         }
1151         return &gtt->ttm.ttm;
1152 }
1153
1154 /**
1155  * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
1156  *
1157  * Map the pages of a ttm_tt object to an address space visible
1158  * to the underlying device.
1159  */
1160 static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
1161                         struct ttm_operation_ctx *ctx)
1162 {
1163         struct amdgpu_device *adev = amdgpu_ttm_adev(ttm->bdev);
1164         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1165         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
1166
1167         /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
1168         if (gtt && gtt->userptr) {
1169                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1170                 if (!ttm->sg)
1171                         return -ENOMEM;
1172
1173                 ttm->page_flags |= TTM_PAGE_FLAG_SG;
1174                 ttm->state = tt_unbound;
1175                 return 0;
1176         }
1177
1178         if (slave && ttm->sg) {
1179                 drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
1180                                                  gtt->ttm.dma_address,
1181                                                  ttm->num_pages);
1182                 ttm->state = tt_unbound;
1183                 return 0;
1184         }
1185
1186 #ifdef CONFIG_SWIOTLB
1187         if (adev->need_swiotlb && swiotlb_nr_tbl()) {
1188                 return ttm_dma_populate(&gtt->ttm, adev->dev, ctx);
1189         }
1190 #endif
1191
1192         /* fall back to generic helper to populate the page array
1193          * and map them to the device */
1194         return ttm_populate_and_map_pages(adev->dev, &gtt->ttm, ctx);
1195 }
1196
1197 /**
1198  * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
1199  *
1200  * Unmaps pages of a ttm_tt object from the device address space and
1201  * unpopulates the page array backing it.
1202  */
1203 static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
1204 {
1205         struct amdgpu_device *adev;
1206         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1207         bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
1208
1209         if (gtt && gtt->userptr) {
1210                 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1211                 kfree(ttm->sg);
1212                 ttm->page_flags &= ~TTM_PAGE_FLAG_SG;
1213                 return;
1214         }
1215
1216         if (slave)
1217                 return;
1218
1219         adev = amdgpu_ttm_adev(ttm->bdev);
1220
1221 #ifdef CONFIG_SWIOTLB
1222         if (adev->need_swiotlb && swiotlb_nr_tbl()) {
1223                 ttm_dma_unpopulate(&gtt->ttm, adev->dev);
1224                 return;
1225         }
1226 #endif
1227
1228         /* fall back to generic helper to unmap and unpopulate array */
1229         ttm_unmap_and_unpopulate_pages(adev->dev, &gtt->ttm);
1230 }
1231
1232 /**
1233  * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
1234  * task
1235  *
1236  * @ttm: The ttm_tt object to bind this userptr object to
1237  * @addr:  The address in the current tasks VM space to use
1238  * @flags: Requirements of userptr object.
1239  *
1240  * Called by amdgpu_gem_userptr_ioctl() to bind userptr pages
1241  * to current task
1242  */
1243 int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
1244                               uint32_t flags)
1245 {
1246         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1247
1248         if (gtt == NULL)
1249                 return -EINVAL;
1250
1251         gtt->userptr = addr;
1252         gtt->userflags = flags;
1253
1254         if (gtt->usertask)
1255                 put_task_struct(gtt->usertask);
1256         gtt->usertask = current->group_leader;
1257         get_task_struct(gtt->usertask);
1258
1259         spin_lock_init(&gtt->guptasklock);
1260         INIT_LIST_HEAD(&gtt->guptasks);
1261         atomic_set(&gtt->mmu_invalidations, 0);
1262         gtt->last_set_pages = 0;
1263
1264         return 0;
1265 }
1266
1267 /**
1268  * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
1269  */
1270 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1271 {
1272         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1273
1274         if (gtt == NULL)
1275                 return NULL;
1276
1277         if (gtt->usertask == NULL)
1278                 return NULL;
1279
1280         return gtt->usertask->mm;
1281 }
1282
1283 /**
1284  * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
1285  * address range for the current task.
1286  *
1287  */
1288 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1289                                   unsigned long end)
1290 {
1291         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1292         struct amdgpu_ttm_gup_task_list *entry;
1293         unsigned long size;
1294
1295         if (gtt == NULL || !gtt->userptr)
1296                 return false;
1297
1298         /* Return false if no part of the ttm_tt object lies within
1299          * the range
1300          */
1301         size = (unsigned long)gtt->ttm.ttm.num_pages * PAGE_SIZE;
1302         if (gtt->userptr > end || gtt->userptr + size <= start)
1303                 return false;
1304
1305         /* Search the lists of tasks that hold this mapping and see
1306          * if current is one of them.  If it is return false.
1307          */
1308         spin_lock(&gtt->guptasklock);
1309         list_for_each_entry(entry, &gtt->guptasks, list) {
1310                 if (entry->task == current) {
1311                         spin_unlock(&gtt->guptasklock);
1312                         return false;
1313                 }
1314         }
1315         spin_unlock(&gtt->guptasklock);
1316
1317         atomic_inc(&gtt->mmu_invalidations);
1318
1319         return true;
1320 }
1321
1322 /**
1323  * amdgpu_ttm_tt_userptr_invalidated - Has the ttm_tt object been invalidated?
1324  */
1325 bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
1326                                        int *last_invalidated)
1327 {
1328         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1329         int prev_invalidated = *last_invalidated;
1330
1331         *last_invalidated = atomic_read(&gtt->mmu_invalidations);
1332         return prev_invalidated != *last_invalidated;
1333 }
1334
1335 /**
1336  * amdgpu_ttm_tt_userptr_needs_pages - Have the pages backing this ttm_tt object
1337  * been invalidated since the last time they've been set?
1338  */
1339 bool amdgpu_ttm_tt_userptr_needs_pages(struct ttm_tt *ttm)
1340 {
1341         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1342
1343         if (gtt == NULL || !gtt->userptr)
1344                 return false;
1345
1346         return atomic_read(&gtt->mmu_invalidations) != gtt->last_set_pages;
1347 }
1348
1349 /**
1350  * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
1351  */
1352 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1353 {
1354         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1355
1356         if (gtt == NULL)
1357                 return false;
1358
1359         return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1360 }
1361
1362 /**
1363  * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object
1364  *
1365  * @ttm: The ttm_tt object to compute the flags for
1366  * @mem: The memory registry backing this ttm_tt object
1367  *
1368  * Figure out the flags to use for a VM PDE (Page Directory Entry).
1369  */
1370 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
1371 {
1372         uint64_t flags = 0;
1373
1374         if (mem && mem->mem_type != TTM_PL_SYSTEM)
1375                 flags |= AMDGPU_PTE_VALID;
1376
1377         if (mem && mem->mem_type == TTM_PL_TT) {
1378                 flags |= AMDGPU_PTE_SYSTEM;
1379
1380                 if (ttm->caching_state == tt_cached)
1381                         flags |= AMDGPU_PTE_SNOOPED;
1382         }
1383
1384         return flags;
1385 }
1386
1387 /**
1388  * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
1389  *
1390  * @ttm: The ttm_tt object to compute the flags for
1391  * @mem: The memory registry backing this ttm_tt object
1392
1393  * Figure out the flags to use for a VM PTE (Page Table Entry).
1394  */
1395 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1396                                  struct ttm_mem_reg *mem)
1397 {
1398         uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
1399
1400         flags |= adev->gart.gart_pte_flags;
1401         flags |= AMDGPU_PTE_READABLE;
1402
1403         if (!amdgpu_ttm_tt_is_readonly(ttm))
1404                 flags |= AMDGPU_PTE_WRITEABLE;
1405
1406         return flags;
1407 }
1408
1409 /**
1410  * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
1411  * object.
1412  *
1413  * Return true if eviction is sensible. Called by ttm_mem_evict_first() on
1414  * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
1415  * it can find space for a new object and by ttm_bo_force_list_clean() which is
1416  * used to clean out a memory space.
1417  */
1418 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1419                                             const struct ttm_place *place)
1420 {
1421         unsigned long num_pages = bo->mem.num_pages;
1422         struct drm_mm_node *node = bo->mem.mm_node;
1423         struct reservation_object_list *flist;
1424         struct dma_fence *f;
1425         int i;
1426
1427         /* If bo is a KFD BO, check if the bo belongs to the current process.
1428          * If true, then return false as any KFD process needs all its BOs to
1429          * be resident to run successfully
1430          */
1431         flist = reservation_object_get_list(bo->resv);
1432         if (flist) {
1433                 for (i = 0; i < flist->shared_count; ++i) {
1434                         f = rcu_dereference_protected(flist->shared[i],
1435                                 reservation_object_held(bo->resv));
1436                         if (amdkfd_fence_check_mm(f, current->mm))
1437                                 return false;
1438                 }
1439         }
1440
1441         switch (bo->mem.mem_type) {
1442         case TTM_PL_TT:
1443                 return true;
1444
1445         case TTM_PL_VRAM:
1446                 /* Check each drm MM node individually */
1447                 while (num_pages) {
1448                         if (place->fpfn < (node->start + node->size) &&
1449                             !(place->lpfn && place->lpfn <= node->start))
1450                                 return true;
1451
1452                         num_pages -= node->size;
1453                         ++node;
1454                 }
1455                 return false;
1456
1457         default:
1458                 break;
1459         }
1460
1461         return ttm_bo_eviction_valuable(bo, place);
1462 }
1463
1464 /**
1465  * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
1466  *
1467  * @bo:  The buffer object to read/write
1468  * @offset:  Offset into buffer object
1469  * @buf:  Secondary buffer to write/read from
1470  * @len: Length in bytes of access
1471  * @write:  true if writing
1472  *
1473  * This is used to access VRAM that backs a buffer object via MMIO
1474  * access for debugging purposes.
1475  */
1476 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1477                                     unsigned long offset,
1478                                     void *buf, int len, int write)
1479 {
1480         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1481         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1482         struct drm_mm_node *nodes;
1483         uint32_t value = 0;
1484         int ret = 0;
1485         uint64_t pos;
1486         unsigned long flags;
1487
1488         if (bo->mem.mem_type != TTM_PL_VRAM)
1489                 return -EIO;
1490
1491         nodes = amdgpu_find_mm_node(&abo->tbo.mem, &offset);
1492         pos = (nodes->start << PAGE_SHIFT) + offset;
1493
1494         while (len && pos < adev->gmc.mc_vram_size) {
1495                 uint64_t aligned_pos = pos & ~(uint64_t)3;
1496                 uint32_t bytes = 4 - (pos & 3);
1497                 uint32_t shift = (pos & 3) * 8;
1498                 uint32_t mask = 0xffffffff << shift;
1499
1500                 if (len < bytes) {
1501                         mask &= 0xffffffff >> (bytes - len) * 8;
1502                         bytes = len;
1503                 }
1504
1505                 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
1506                 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)aligned_pos) | 0x80000000);
1507                 WREG32_NO_KIQ(mmMM_INDEX_HI, aligned_pos >> 31);
1508                 if (!write || mask != 0xffffffff)
1509                         value = RREG32_NO_KIQ(mmMM_DATA);
1510                 if (write) {
1511                         value &= ~mask;
1512                         value |= (*(uint32_t *)buf << shift) & mask;
1513                         WREG32_NO_KIQ(mmMM_DATA, value);
1514                 }
1515                 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
1516                 if (!write) {
1517                         value = (value & mask) >> shift;
1518                         memcpy(buf, &value, bytes);
1519                 }
1520
1521                 ret += bytes;
1522                 buf = (uint8_t *)buf + bytes;
1523                 pos += bytes;
1524                 len -= bytes;
1525                 if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) {
1526                         ++nodes;
1527                         pos = (nodes->start << PAGE_SHIFT);
1528                 }
1529         }
1530
1531         return ret;
1532 }
1533
1534 static struct ttm_bo_driver amdgpu_bo_driver = {
1535         .ttm_tt_create = &amdgpu_ttm_tt_create,
1536         .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1537         .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1538         .invalidate_caches = &amdgpu_invalidate_caches,
1539         .init_mem_type = &amdgpu_init_mem_type,
1540         .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1541         .evict_flags = &amdgpu_evict_flags,
1542         .move = &amdgpu_bo_move,
1543         .verify_access = &amdgpu_verify_access,
1544         .move_notify = &amdgpu_bo_move_notify,
1545         .fault_reserve_notify = &amdgpu_bo_fault_reserve_notify,
1546         .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1547         .io_mem_free = &amdgpu_ttm_io_mem_free,
1548         .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1549         .access_memory = &amdgpu_ttm_access_memory
1550 };
1551
1552 /*
1553  * Firmware Reservation functions
1554  */
1555 /**
1556  * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1557  *
1558  * @adev: amdgpu_device pointer
1559  *
1560  * free fw reserved vram if it has been reserved.
1561  */
1562 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1563 {
1564         amdgpu_bo_free_kernel(&adev->fw_vram_usage.reserved_bo,
1565                 NULL, &adev->fw_vram_usage.va);
1566 }
1567
1568 /**
1569  * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1570  *
1571  * @adev: amdgpu_device pointer
1572  *
1573  * create bo vram reservation from fw.
1574  */
1575 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1576 {
1577         struct ttm_operation_ctx ctx = { false, false };
1578         struct amdgpu_bo_param bp;
1579         int r = 0;
1580         int i;
1581         u64 vram_size = adev->gmc.visible_vram_size;
1582         u64 offset = adev->fw_vram_usage.start_offset;
1583         u64 size = adev->fw_vram_usage.size;
1584         struct amdgpu_bo *bo;
1585
1586         memset(&bp, 0, sizeof(bp));
1587         bp.size = adev->fw_vram_usage.size;
1588         bp.byte_align = PAGE_SIZE;
1589         bp.domain = AMDGPU_GEM_DOMAIN_VRAM;
1590         bp.flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
1591                 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1592         bp.type = ttm_bo_type_kernel;
1593         bp.resv = NULL;
1594         adev->fw_vram_usage.va = NULL;
1595         adev->fw_vram_usage.reserved_bo = NULL;
1596
1597         if (adev->fw_vram_usage.size > 0 &&
1598                 adev->fw_vram_usage.size <= vram_size) {
1599
1600                 r = amdgpu_bo_create(adev, &bp,
1601                                      &adev->fw_vram_usage.reserved_bo);
1602                 if (r)
1603                         goto error_create;
1604
1605                 r = amdgpu_bo_reserve(adev->fw_vram_usage.reserved_bo, false);
1606                 if (r)
1607                         goto error_reserve;
1608
1609                 /* remove the original mem node and create a new one at the
1610                  * request position
1611                  */
1612                 bo = adev->fw_vram_usage.reserved_bo;
1613                 offset = ALIGN(offset, PAGE_SIZE);
1614                 for (i = 0; i < bo->placement.num_placement; ++i) {
1615                         bo->placements[i].fpfn = offset >> PAGE_SHIFT;
1616                         bo->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
1617                 }
1618
1619                 ttm_bo_mem_put(&bo->tbo, &bo->tbo.mem);
1620                 r = ttm_bo_mem_space(&bo->tbo, &bo->placement,
1621                                      &bo->tbo.mem, &ctx);
1622                 if (r)
1623                         goto error_pin;
1624
1625                 r = amdgpu_bo_pin_restricted(adev->fw_vram_usage.reserved_bo,
1626                         AMDGPU_GEM_DOMAIN_VRAM,
1627                         adev->fw_vram_usage.start_offset,
1628                         (adev->fw_vram_usage.start_offset +
1629                         adev->fw_vram_usage.size));
1630                 if (r)
1631                         goto error_pin;
1632                 r = amdgpu_bo_kmap(adev->fw_vram_usage.reserved_bo,
1633                         &adev->fw_vram_usage.va);
1634                 if (r)
1635                         goto error_kmap;
1636
1637                 amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
1638         }
1639         return r;
1640
1641 error_kmap:
1642         amdgpu_bo_unpin(adev->fw_vram_usage.reserved_bo);
1643 error_pin:
1644         amdgpu_bo_unreserve(adev->fw_vram_usage.reserved_bo);
1645 error_reserve:
1646         amdgpu_bo_unref(&adev->fw_vram_usage.reserved_bo);
1647 error_create:
1648         adev->fw_vram_usage.va = NULL;
1649         adev->fw_vram_usage.reserved_bo = NULL;
1650         return r;
1651 }
1652 /**
1653  * amdgpu_ttm_init - Init the memory management (ttm) as well as various
1654  * gtt/vram related fields.
1655  *
1656  * This initializes all of the memory space pools that the TTM layer
1657  * will need such as the GTT space (system memory mapped to the device),
1658  * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
1659  * can be mapped per VMID.
1660  */
1661 int amdgpu_ttm_init(struct amdgpu_device *adev)
1662 {
1663         uint64_t gtt_size;
1664         int r;
1665         u64 vis_vram_limit;
1666
1667         mutex_init(&adev->mman.gtt_window_lock);
1668
1669         /* No others user of address space so set it to 0 */
1670         r = ttm_bo_device_init(&adev->mman.bdev,
1671                                &amdgpu_bo_driver,
1672                                adev->ddev->anon_inode->i_mapping,
1673                                DRM_FILE_PAGE_OFFSET,
1674                                adev->need_dma32);
1675         if (r) {
1676                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1677                 return r;
1678         }
1679         adev->mman.initialized = true;
1680
1681         /* We opt to avoid OOM on system pages allocations */
1682         adev->mman.bdev.no_retry = true;
1683
1684         /* Initialize VRAM pool with all of VRAM divided into pages */
1685         r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_VRAM,
1686                                 adev->gmc.real_vram_size >> PAGE_SHIFT);
1687         if (r) {
1688                 DRM_ERROR("Failed initializing VRAM heap.\n");
1689                 return r;
1690         }
1691
1692         /* Reduce size of CPU-visible VRAM if requested */
1693         vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
1694         if (amdgpu_vis_vram_limit > 0 &&
1695             vis_vram_limit <= adev->gmc.visible_vram_size)
1696                 adev->gmc.visible_vram_size = vis_vram_limit;
1697
1698         /* Change the size here instead of the init above so only lpfn is affected */
1699         amdgpu_ttm_set_buffer_funcs_status(adev, false);
1700 #ifdef CONFIG_64BIT
1701         adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
1702                                                 adev->gmc.visible_vram_size);
1703 #endif
1704
1705         /*
1706          *The reserved vram for firmware must be pinned to the specified
1707          *place on the VRAM, so reserve it early.
1708          */
1709         r = amdgpu_ttm_fw_reserve_vram_init(adev);
1710         if (r) {
1711                 return r;
1712         }
1713
1714         /* allocate memory as required for VGA
1715          * This is used for VGA emulation and pre-OS scanout buffers to
1716          * avoid display artifacts while transitioning between pre-OS
1717          * and driver.  */
1718         r = amdgpu_bo_create_kernel(adev, adev->gmc.stolen_size, PAGE_SIZE,
1719                                     AMDGPU_GEM_DOMAIN_VRAM,
1720                                     &adev->stolen_vga_memory,
1721                                     NULL, NULL);
1722         if (r)
1723                 return r;
1724         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1725                  (unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
1726
1727         /* Compute GTT size, either bsaed on 3/4th the size of RAM size
1728          * or whatever the user passed on module init */
1729         if (amdgpu_gtt_size == -1) {
1730                 struct sysinfo si;
1731
1732                 si_meminfo(&si);
1733                 gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
1734                                adev->gmc.mc_vram_size),
1735                                ((uint64_t)si.totalram * si.mem_unit * 3/4));
1736         }
1737         else
1738                 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1739
1740         /* Initialize GTT memory pool */
1741         r = ttm_bo_init_mm(&adev->mman.bdev, TTM_PL_TT, gtt_size >> PAGE_SHIFT);
1742         if (r) {
1743                 DRM_ERROR("Failed initializing GTT heap.\n");
1744                 return r;
1745         }
1746         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1747                  (unsigned)(gtt_size / (1024 * 1024)));
1748
1749         /* Initialize various on-chip memory pools */
1750         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GDS,
1751                            adev->gds.mem.total_size);
1752         if (r) {
1753                 DRM_ERROR("Failed initializing GDS heap.\n");
1754                 return r;
1755         }
1756
1757         r = amdgpu_bo_create_kernel(adev, adev->gds.mem.gfx_partition_size,
1758                                     PAGE_SIZE, AMDGPU_GEM_DOMAIN_GDS,
1759                                     &adev->gds.gds_gfx_bo, NULL, NULL);
1760         if (r)
1761                 return r;
1762
1763         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_GWS,
1764                            adev->gds.gws.total_size);
1765         if (r) {
1766                 DRM_ERROR("Failed initializing gws heap.\n");
1767                 return r;
1768         }
1769
1770         r = amdgpu_bo_create_kernel(adev, adev->gds.gws.gfx_partition_size,
1771                                     PAGE_SIZE, AMDGPU_GEM_DOMAIN_GWS,
1772                                     &adev->gds.gws_gfx_bo, NULL, NULL);
1773         if (r)
1774                 return r;
1775
1776         r = ttm_bo_init_mm(&adev->mman.bdev, AMDGPU_PL_OA,
1777                            adev->gds.oa.total_size);
1778         if (r) {
1779                 DRM_ERROR("Failed initializing oa heap.\n");
1780                 return r;
1781         }
1782
1783         r = amdgpu_bo_create_kernel(adev, adev->gds.oa.gfx_partition_size,
1784                                     PAGE_SIZE, AMDGPU_GEM_DOMAIN_OA,
1785                                     &adev->gds.oa_gfx_bo, NULL, NULL);
1786         if (r)
1787                 return r;
1788
1789         /* Register debugfs entries for amdgpu_ttm */
1790         r = amdgpu_ttm_debugfs_init(adev);
1791         if (r) {
1792                 DRM_ERROR("Failed to init debugfs\n");
1793                 return r;
1794         }
1795         return 0;
1796 }
1797
1798 /**
1799  * amdgpu_ttm_late_init - Handle any late initialization for amdgpu_ttm
1800  */
1801 void amdgpu_ttm_late_init(struct amdgpu_device *adev)
1802 {
1803         /* return the VGA stolen memory (if any) back to VRAM */
1804         amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
1805 }
1806
1807 /**
1808  * amdgpu_ttm_fini - De-initialize the TTM memory pools
1809  */
1810 void amdgpu_ttm_fini(struct amdgpu_device *adev)
1811 {
1812         if (!adev->mman.initialized)
1813                 return;
1814
1815         amdgpu_ttm_debugfs_fini(adev);
1816         amdgpu_ttm_fw_reserve_vram_fini(adev);
1817         if (adev->mman.aper_base_kaddr)
1818                 iounmap(adev->mman.aper_base_kaddr);
1819         adev->mman.aper_base_kaddr = NULL;
1820
1821         ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_VRAM);
1822         ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_TT);
1823         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GDS);
1824         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_GWS);
1825         ttm_bo_clean_mm(&adev->mman.bdev, AMDGPU_PL_OA);
1826         ttm_bo_device_release(&adev->mman.bdev);
1827         adev->mman.initialized = false;
1828         DRM_INFO("amdgpu: ttm finalized\n");
1829 }
1830
1831 /**
1832  * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
1833  *
1834  * @adev: amdgpu_device pointer
1835  * @enable: true when we can use buffer functions.
1836  *
1837  * Enable/disable use of buffer functions during suspend/resume. This should
1838  * only be called at bootup or when userspace isn't running.
1839  */
1840 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
1841 {
1842         struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_VRAM];
1843         uint64_t size;
1844         int r;
1845
1846         if (!adev->mman.initialized || adev->in_gpu_reset ||
1847             adev->mman.buffer_funcs_enabled == enable)
1848                 return;
1849
1850         if (enable) {
1851                 struct amdgpu_ring *ring;
1852                 struct drm_sched_rq *rq;
1853
1854                 ring = adev->mman.buffer_funcs_ring;
1855                 rq = &ring->sched.sched_rq[DRM_SCHED_PRIORITY_KERNEL];
1856                 r = drm_sched_entity_init(&adev->mman.entity, &rq, 1, NULL);
1857                 if (r) {
1858                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
1859                                   r);
1860                         return;
1861                 }
1862         } else {
1863                 drm_sched_entity_destroy(&adev->mman.entity);
1864                 dma_fence_put(man->move);
1865                 man->move = NULL;
1866         }
1867
1868         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
1869         if (enable)
1870                 size = adev->gmc.real_vram_size;
1871         else
1872                 size = adev->gmc.visible_vram_size;
1873         man->size = size >> PAGE_SHIFT;
1874         adev->mman.buffer_funcs_enabled = enable;
1875 }
1876
1877 int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
1878 {
1879         struct drm_file *file_priv;
1880         struct amdgpu_device *adev;
1881
1882         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
1883                 return -EINVAL;
1884
1885         file_priv = filp->private_data;
1886         adev = file_priv->minor->dev->dev_private;
1887         if (adev == NULL)
1888                 return -EINVAL;
1889
1890         return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
1891 }
1892
1893 static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
1894                              struct ttm_mem_reg *mem, unsigned num_pages,
1895                              uint64_t offset, unsigned window,
1896                              struct amdgpu_ring *ring,
1897                              uint64_t *addr)
1898 {
1899         struct amdgpu_ttm_tt *gtt = (void *)bo->ttm;
1900         struct amdgpu_device *adev = ring->adev;
1901         struct ttm_tt *ttm = bo->ttm;
1902         struct amdgpu_job *job;
1903         unsigned num_dw, num_bytes;
1904         dma_addr_t *dma_address;
1905         struct dma_fence *fence;
1906         uint64_t src_addr, dst_addr;
1907         uint64_t flags;
1908         int r;
1909
1910         BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
1911                AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
1912
1913         *addr = adev->gmc.gart_start;
1914         *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
1915                 AMDGPU_GPU_PAGE_SIZE;
1916
1917         num_dw = adev->mman.buffer_funcs->copy_num_dw;
1918         while (num_dw & 0x7)
1919                 num_dw++;
1920
1921         num_bytes = num_pages * 8;
1922
1923         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job);
1924         if (r)
1925                 return r;
1926
1927         src_addr = num_dw * 4;
1928         src_addr += job->ibs[0].gpu_addr;
1929
1930         dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
1931         dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
1932         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
1933                                 dst_addr, num_bytes);
1934
1935         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1936         WARN_ON(job->ibs[0].length_dw > num_dw);
1937
1938         dma_address = &gtt->ttm.dma_address[offset >> PAGE_SHIFT];
1939         flags = amdgpu_ttm_tt_pte_flags(adev, ttm, mem);
1940         r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
1941                             &job->ibs[0].ptr[num_dw]);
1942         if (r)
1943                 goto error_free;
1944
1945         r = amdgpu_job_submit(job, &adev->mman.entity,
1946                               AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
1947         if (r)
1948                 goto error_free;
1949
1950         dma_fence_put(fence);
1951
1952         return r;
1953
1954 error_free:
1955         amdgpu_job_free(job);
1956         return r;
1957 }
1958
1959 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
1960                        uint64_t dst_offset, uint32_t byte_count,
1961                        struct reservation_object *resv,
1962                        struct dma_fence **fence, bool direct_submit,
1963                        bool vm_needs_flush)
1964 {
1965         struct amdgpu_device *adev = ring->adev;
1966         struct amdgpu_job *job;
1967
1968         uint32_t max_bytes;
1969         unsigned num_loops, num_dw;
1970         unsigned i;
1971         int r;
1972
1973         if (direct_submit && !ring->sched.ready) {
1974                 DRM_ERROR("Trying to move memory with ring turned off.\n");
1975                 return -EINVAL;
1976         }
1977
1978         max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
1979         num_loops = DIV_ROUND_UP(byte_count, max_bytes);
1980         num_dw = num_loops * adev->mman.buffer_funcs->copy_num_dw;
1981
1982         /* for IB padding */
1983         while (num_dw & 0x7)
1984                 num_dw++;
1985
1986         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
1987         if (r)
1988                 return r;
1989
1990         if (vm_needs_flush) {
1991                 job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
1992                 job->vm_needs_flush = true;
1993         }
1994         if (resv) {
1995                 r = amdgpu_sync_resv(adev, &job->sync, resv,
1996                                      AMDGPU_FENCE_OWNER_UNDEFINED,
1997                                      false);
1998                 if (r) {
1999                         DRM_ERROR("sync failed (%d).\n", r);
2000                         goto error_free;
2001                 }
2002         }
2003
2004         for (i = 0; i < num_loops; i++) {
2005                 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
2006
2007                 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
2008                                         dst_offset, cur_size_in_bytes);
2009
2010                 src_offset += cur_size_in_bytes;
2011                 dst_offset += cur_size_in_bytes;
2012                 byte_count -= cur_size_in_bytes;
2013         }
2014
2015         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2016         WARN_ON(job->ibs[0].length_dw > num_dw);
2017         if (direct_submit)
2018                 r = amdgpu_job_submit_direct(job, ring, fence);
2019         else
2020                 r = amdgpu_job_submit(job, &adev->mman.entity,
2021                                       AMDGPU_FENCE_OWNER_UNDEFINED, fence);
2022         if (r)
2023                 goto error_free;
2024
2025         return r;
2026
2027 error_free:
2028         amdgpu_job_free(job);
2029         DRM_ERROR("Error scheduling IBs (%d)\n", r);
2030         return r;
2031 }
2032
2033 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
2034                        uint32_t src_data,
2035                        struct reservation_object *resv,
2036                        struct dma_fence **fence)
2037 {
2038         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
2039         uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
2040         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
2041
2042         struct drm_mm_node *mm_node;
2043         unsigned long num_pages;
2044         unsigned int num_loops, num_dw;
2045
2046         struct amdgpu_job *job;
2047         int r;
2048
2049         if (!adev->mman.buffer_funcs_enabled) {
2050                 DRM_ERROR("Trying to clear memory with ring turned off.\n");
2051                 return -EINVAL;
2052         }
2053
2054         if (bo->tbo.mem.mem_type == TTM_PL_TT) {
2055                 r = amdgpu_ttm_alloc_gart(&bo->tbo);
2056                 if (r)
2057                         return r;
2058         }
2059
2060         num_pages = bo->tbo.num_pages;
2061         mm_node = bo->tbo.mem.mm_node;
2062         num_loops = 0;
2063         while (num_pages) {
2064                 uint32_t byte_count = mm_node->size << PAGE_SHIFT;
2065
2066                 num_loops += DIV_ROUND_UP(byte_count, max_bytes);
2067                 num_pages -= mm_node->size;
2068                 ++mm_node;
2069         }
2070         num_dw = num_loops * adev->mman.buffer_funcs->fill_num_dw;
2071
2072         /* for IB padding */
2073         num_dw += 64;
2074
2075         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, &job);
2076         if (r)
2077                 return r;
2078
2079         if (resv) {
2080                 r = amdgpu_sync_resv(adev, &job->sync, resv,
2081                                      AMDGPU_FENCE_OWNER_UNDEFINED, false);
2082                 if (r) {
2083                         DRM_ERROR("sync failed (%d).\n", r);
2084                         goto error_free;
2085                 }
2086         }
2087
2088         num_pages = bo->tbo.num_pages;
2089         mm_node = bo->tbo.mem.mm_node;
2090
2091         while (num_pages) {
2092                 uint32_t byte_count = mm_node->size << PAGE_SHIFT;
2093                 uint64_t dst_addr;
2094
2095                 dst_addr = amdgpu_mm_node_addr(&bo->tbo, mm_node, &bo->tbo.mem);
2096                 while (byte_count) {
2097                         uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
2098
2099                         amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data,
2100                                                 dst_addr, cur_size_in_bytes);
2101
2102                         dst_addr += cur_size_in_bytes;
2103                         byte_count -= cur_size_in_bytes;
2104                 }
2105
2106                 num_pages -= mm_node->size;
2107                 ++mm_node;
2108         }
2109
2110         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2111         WARN_ON(job->ibs[0].length_dw > num_dw);
2112         r = amdgpu_job_submit(job, &adev->mman.entity,
2113                               AMDGPU_FENCE_OWNER_UNDEFINED, fence);
2114         if (r)
2115                 goto error_free;
2116
2117         return 0;
2118
2119 error_free:
2120         amdgpu_job_free(job);
2121         return r;
2122 }
2123
2124 #if defined(CONFIG_DEBUG_FS)
2125
2126 static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
2127 {
2128         struct drm_info_node *node = (struct drm_info_node *)m->private;
2129         unsigned ttm_pl = (uintptr_t)node->info_ent->data;
2130         struct drm_device *dev = node->minor->dev;
2131         struct amdgpu_device *adev = dev->dev_private;
2132         struct ttm_mem_type_manager *man = &adev->mman.bdev.man[ttm_pl];
2133         struct drm_printer p = drm_seq_file_printer(m);
2134
2135         man->func->debug(man, &p);
2136         return 0;
2137 }
2138
2139 static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
2140         {"amdgpu_vram_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_VRAM},
2141         {"amdgpu_gtt_mm", amdgpu_mm_dump_table, 0, (void *)TTM_PL_TT},
2142         {"amdgpu_gds_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GDS},
2143         {"amdgpu_gws_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_GWS},
2144         {"amdgpu_oa_mm", amdgpu_mm_dump_table, 0, (void *)AMDGPU_PL_OA},
2145         {"ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL},
2146 #ifdef CONFIG_SWIOTLB
2147         {"ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL}
2148 #endif
2149 };
2150
2151 /**
2152  * amdgpu_ttm_vram_read - Linear read access to VRAM
2153  *
2154  * Accesses VRAM via MMIO for debugging purposes.
2155  */
2156 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
2157                                     size_t size, loff_t *pos)
2158 {
2159         struct amdgpu_device *adev = file_inode(f)->i_private;
2160         ssize_t result = 0;
2161         int r;
2162
2163         if (size & 0x3 || *pos & 0x3)
2164                 return -EINVAL;
2165
2166         if (*pos >= adev->gmc.mc_vram_size)
2167                 return -ENXIO;
2168
2169         while (size) {
2170                 unsigned long flags;
2171                 uint32_t value;
2172
2173                 if (*pos >= adev->gmc.mc_vram_size)
2174                         return result;
2175
2176                 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
2177                 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
2178                 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
2179                 value = RREG32_NO_KIQ(mmMM_DATA);
2180                 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
2181
2182                 r = put_user(value, (uint32_t *)buf);
2183                 if (r)
2184                         return r;
2185
2186                 result += 4;
2187                 buf += 4;
2188                 *pos += 4;
2189                 size -= 4;
2190         }
2191
2192         return result;
2193 }
2194
2195 /**
2196  * amdgpu_ttm_vram_write - Linear write access to VRAM
2197  *
2198  * Accesses VRAM via MMIO for debugging purposes.
2199  */
2200 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
2201                                     size_t size, loff_t *pos)
2202 {
2203         struct amdgpu_device *adev = file_inode(f)->i_private;
2204         ssize_t result = 0;
2205         int r;
2206
2207         if (size & 0x3 || *pos & 0x3)
2208                 return -EINVAL;
2209
2210         if (*pos >= adev->gmc.mc_vram_size)
2211                 return -ENXIO;
2212
2213         while (size) {
2214                 unsigned long flags;
2215                 uint32_t value;
2216
2217                 if (*pos >= adev->gmc.mc_vram_size)
2218                         return result;
2219
2220                 r = get_user(value, (uint32_t *)buf);
2221                 if (r)
2222                         return r;
2223
2224                 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
2225                 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
2226                 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
2227                 WREG32_NO_KIQ(mmMM_DATA, value);
2228                 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
2229
2230                 result += 4;
2231                 buf += 4;
2232                 *pos += 4;
2233                 size -= 4;
2234         }
2235
2236         return result;
2237 }
2238
2239 static const struct file_operations amdgpu_ttm_vram_fops = {
2240         .owner = THIS_MODULE,
2241         .read = amdgpu_ttm_vram_read,
2242         .write = amdgpu_ttm_vram_write,
2243         .llseek = default_llseek,
2244 };
2245
2246 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
2247
2248 /**
2249  * amdgpu_ttm_gtt_read - Linear read access to GTT memory
2250  */
2251 static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
2252                                    size_t size, loff_t *pos)
2253 {
2254         struct amdgpu_device *adev = file_inode(f)->i_private;
2255         ssize_t result = 0;
2256         int r;
2257
2258         while (size) {
2259                 loff_t p = *pos / PAGE_SIZE;
2260                 unsigned off = *pos & ~PAGE_MASK;
2261                 size_t cur_size = min_t(size_t, size, PAGE_SIZE - off);
2262                 struct page *page;
2263                 void *ptr;
2264
2265                 if (p >= adev->gart.num_cpu_pages)
2266                         return result;
2267
2268                 page = adev->gart.pages[p];
2269                 if (page) {
2270                         ptr = kmap(page);
2271                         ptr += off;
2272
2273                         r = copy_to_user(buf, ptr, cur_size);
2274                         kunmap(adev->gart.pages[p]);
2275                 } else
2276                         r = clear_user(buf, cur_size);
2277
2278                 if (r)
2279                         return -EFAULT;
2280
2281                 result += cur_size;
2282                 buf += cur_size;
2283                 *pos += cur_size;
2284                 size -= cur_size;
2285         }
2286
2287         return result;
2288 }
2289
2290 static const struct file_operations amdgpu_ttm_gtt_fops = {
2291         .owner = THIS_MODULE,
2292         .read = amdgpu_ttm_gtt_read,
2293         .llseek = default_llseek
2294 };
2295
2296 #endif
2297
2298 /**
2299  * amdgpu_iomem_read - Virtual read access to GPU mapped memory
2300  *
2301  * This function is used to read memory that has been mapped to the
2302  * GPU and the known addresses are not physical addresses but instead
2303  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2304  */
2305 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
2306                                  size_t size, loff_t *pos)
2307 {
2308         struct amdgpu_device *adev = file_inode(f)->i_private;
2309         struct iommu_domain *dom;
2310         ssize_t result = 0;
2311         int r;
2312
2313         /* retrieve the IOMMU domain if any for this device */
2314         dom = iommu_get_domain_for_dev(adev->dev);
2315
2316         while (size) {
2317                 phys_addr_t addr = *pos & PAGE_MASK;
2318                 loff_t off = *pos & ~PAGE_MASK;
2319                 size_t bytes = PAGE_SIZE - off;
2320                 unsigned long pfn;
2321                 struct page *p;
2322                 void *ptr;
2323
2324                 bytes = bytes < size ? bytes : size;
2325
2326                 /* Translate the bus address to a physical address.  If
2327                  * the domain is NULL it means there is no IOMMU active
2328                  * and the address translation is the identity
2329                  */
2330                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2331
2332                 pfn = addr >> PAGE_SHIFT;
2333                 if (!pfn_valid(pfn))
2334                         return -EPERM;
2335
2336                 p = pfn_to_page(pfn);
2337                 if (p->mapping != adev->mman.bdev.dev_mapping)
2338                         return -EPERM;
2339
2340                 ptr = kmap(p);
2341                 r = copy_to_user(buf, ptr + off, bytes);
2342                 kunmap(p);
2343                 if (r)
2344                         return -EFAULT;
2345
2346                 size -= bytes;
2347                 *pos += bytes;
2348                 result += bytes;
2349         }
2350
2351         return result;
2352 }
2353
2354 /**
2355  * amdgpu_iomem_write - Virtual write access to GPU mapped memory
2356  *
2357  * This function is used to write memory that has been mapped to the
2358  * GPU and the known addresses are not physical addresses but instead
2359  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2360  */
2361 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
2362                                  size_t size, loff_t *pos)
2363 {
2364         struct amdgpu_device *adev = file_inode(f)->i_private;
2365         struct iommu_domain *dom;
2366         ssize_t result = 0;
2367         int r;
2368
2369         dom = iommu_get_domain_for_dev(adev->dev);
2370
2371         while (size) {
2372                 phys_addr_t addr = *pos & PAGE_MASK;
2373                 loff_t off = *pos & ~PAGE_MASK;
2374                 size_t bytes = PAGE_SIZE - off;
2375                 unsigned long pfn;
2376                 struct page *p;
2377                 void *ptr;
2378
2379                 bytes = bytes < size ? bytes : size;
2380
2381                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2382
2383                 pfn = addr >> PAGE_SHIFT;
2384                 if (!pfn_valid(pfn))
2385                         return -EPERM;
2386
2387                 p = pfn_to_page(pfn);
2388                 if (p->mapping != adev->mman.bdev.dev_mapping)
2389                         return -EPERM;
2390
2391                 ptr = kmap(p);
2392                 r = copy_from_user(ptr + off, buf, bytes);
2393                 kunmap(p);
2394                 if (r)
2395                         return -EFAULT;
2396
2397                 size -= bytes;
2398                 *pos += bytes;
2399                 result += bytes;
2400         }
2401
2402         return result;
2403 }
2404
2405 static const struct file_operations amdgpu_ttm_iomem_fops = {
2406         .owner = THIS_MODULE,
2407         .read = amdgpu_iomem_read,
2408         .write = amdgpu_iomem_write,
2409         .llseek = default_llseek
2410 };
2411
2412 static const struct {
2413         char *name;
2414         const struct file_operations *fops;
2415         int domain;
2416 } ttm_debugfs_entries[] = {
2417         { "amdgpu_vram", &amdgpu_ttm_vram_fops, TTM_PL_VRAM },
2418 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
2419         { "amdgpu_gtt", &amdgpu_ttm_gtt_fops, TTM_PL_TT },
2420 #endif
2421         { "amdgpu_iomem", &amdgpu_ttm_iomem_fops, TTM_PL_SYSTEM },
2422 };
2423
2424 #endif
2425
2426 static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
2427 {
2428 #if defined(CONFIG_DEBUG_FS)
2429         unsigned count;
2430
2431         struct drm_minor *minor = adev->ddev->primary;
2432         struct dentry *ent, *root = minor->debugfs_root;
2433
2434         for (count = 0; count < ARRAY_SIZE(ttm_debugfs_entries); count++) {
2435                 ent = debugfs_create_file(
2436                                 ttm_debugfs_entries[count].name,
2437                                 S_IFREG | S_IRUGO, root,
2438                                 adev,
2439                                 ttm_debugfs_entries[count].fops);
2440                 if (IS_ERR(ent))
2441                         return PTR_ERR(ent);
2442                 if (ttm_debugfs_entries[count].domain == TTM_PL_VRAM)
2443                         i_size_write(ent->d_inode, adev->gmc.mc_vram_size);
2444                 else if (ttm_debugfs_entries[count].domain == TTM_PL_TT)
2445                         i_size_write(ent->d_inode, adev->gmc.gart_size);
2446                 adev->mman.debugfs_entries[count] = ent;
2447         }
2448
2449         count = ARRAY_SIZE(amdgpu_ttm_debugfs_list);
2450
2451 #ifdef CONFIG_SWIOTLB
2452         if (!(adev->need_swiotlb && swiotlb_nr_tbl()))
2453                 --count;
2454 #endif
2455
2456         return amdgpu_debugfs_add_files(adev, amdgpu_ttm_debugfs_list, count);
2457 #else
2458         return 0;
2459 #endif
2460 }
2461
2462 static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
2463 {
2464 #if defined(CONFIG_DEBUG_FS)
2465         unsigned i;
2466
2467         for (i = 0; i < ARRAY_SIZE(ttm_debugfs_entries); i++)
2468                 debugfs_remove(adev->mman.debugfs_entries[i]);
2469 #endif
2470 }