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 <glisse@freedesktop.org>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32
  33 #include <linux/dma-mapping.h>
  34 #include <linux/iommu.h>
  35 #include <linux/pagemap.h>
  36 #include <linux/sched/task.h>
  37 #include <linux/sched/mm.h>
  38 #include <linux/seq_file.h>
  39 #include <linux/slab.h>
  40 #include <linux/swap.h>
  41 #include <linux/dma-buf.h>
  42 #include <linux/sizes.h>
  43 #include <linux/module.h>
  44
  45 #include <drm/drm_drv.h>
  46 #include <drm/ttm/ttm_bo.h>
  47 #include <drm/ttm/ttm_placement.h>
  48 #include <drm/ttm/ttm_range_manager.h>
  49 #include <drm/ttm/ttm_tt.h>
  50
  51 #include <drm/amdgpu_drm.h>
  52
  53 #include "amdgpu.h"
  54 #include "amdgpu_object.h"
  55 #include "amdgpu_trace.h"
  56 #include "amdgpu_amdkfd.h"
  57 #include "amdgpu_sdma.h"
  58 #include "amdgpu_ras.h"
  59 #include "amdgpu_hmm.h"
  60 #include "amdgpu_atomfirmware.h"
  61 #include "amdgpu_res_cursor.h"
  62 #include "bif/bif_4_1_d.h"
  63
  64 MODULE_IMPORT_NS(DMA_BUF);
  65
  66 #define AMDGPU_TTM_VRAM_MAX_DW_READ     ((size_t)128)
  67
  68 static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
  69                                    struct ttm_tt *ttm,
  70                                    struct ttm_resource *bo_mem);
  71 static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev,
  72                                       struct ttm_tt *ttm);
  73
  74 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
  75                                     unsigned int type,
  76                                     uint64_t size_in_page)
  77 {
  78         return ttm_range_man_init(&adev->mman.bdev, type,
  79                                   false, size_in_page);
  80 }
  81
  82 /**
  83  * amdgpu_evict_flags - Compute placement flags
  84  *
  85  * @bo: The buffer object to evict
  86  * @placement: Possible destination(s) for evicted BO
  87  *
  88  * Fill in placement data when ttm_bo_evict() is called
  89  */
  90 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
  91                                 struct ttm_placement *placement)
  92 {
  93         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
  94         struct amdgpu_bo *abo;
  95         static const struct ttm_place placements = {
  96                 .fpfn = 0,
  97                 .lpfn = 0,
  98                 .mem_type = TTM_PL_SYSTEM,
  99                 .flags = 0
 100         };
 101
 102         /* Don't handle scatter gather BOs */
 103         if (bo->type == ttm_bo_type_sg) {
 104                 placement->num_placement = 0;
 105                 placement->num_busy_placement = 0;
 106                 return;
 107         }
 108
 109         /* Object isn't an AMDGPU object so ignore */
 110         if (!amdgpu_bo_is_amdgpu_bo(bo)) {
 111                 placement->placement = &placements;
 112                 placement->busy_placement = &placements;
 113                 placement->num_placement = 1;
 114                 placement->num_busy_placement = 1;
 115                 return;
 116         }
 117
 118         abo = ttm_to_amdgpu_bo(bo);
 119         if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
 120                 placement->num_placement = 0;
 121                 placement->num_busy_placement = 0;
 122                 return;
 123         }
 124
 125         switch (bo->resource->mem_type) {
 126         case AMDGPU_PL_GDS:
 127         case AMDGPU_PL_GWS:
 128         case AMDGPU_PL_OA:
 129         case AMDGPU_PL_DOORBELL:
 130                 placement->num_placement = 0;
 131                 placement->num_busy_placement = 0;
 132                 return;
 133
 134         case TTM_PL_VRAM:
 135                 if (!adev->mman.buffer_funcs_enabled) {
 136                         /* Move to system memory */
 137                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 138                 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 139                            !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 140                            amdgpu_bo_in_cpu_visible_vram(abo)) {
 141
 142                         /* Try evicting to the CPU inaccessible part of VRAM
 143                          * first, but only set GTT as busy placement, so this
 144                          * BO will be evicted to GTT rather than causing other
 145                          * BOs to be evicted from VRAM
 146                          */
 147                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
 148                                                         AMDGPU_GEM_DOMAIN_GTT |
 149                                                         AMDGPU_GEM_DOMAIN_CPU);
 150                         abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 151                         abo->placements[0].lpfn = 0;
 152                         abo->placement.busy_placement = &abo->placements[1];
 153                         abo->placement.num_busy_placement = 1;
 154                 } else {
 155                         /* Move to GTT memory */
 156                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
 157                                                         AMDGPU_GEM_DOMAIN_CPU);
 158                 }
 159                 break;
 160         case TTM_PL_TT:
 161         case AMDGPU_PL_PREEMPT:
 162         default:
 163                 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 164                 break;
 165         }
 166         *placement = abo->placement;
 167 }
 168
 169 /**
 170  * amdgpu_ttm_map_buffer - Map memory into the GART windows
 171  * @bo: buffer object to map
 172  * @mem: memory object to map
 173  * @mm_cur: range to map
 174  * @window: which GART window to use
 175  * @ring: DMA ring to use for the copy
 176  * @tmz: if we should setup a TMZ enabled mapping
 177  * @size: in number of bytes to map, out number of bytes mapped
 178  * @addr: resulting address inside the MC address space
 179  *
 180  * Setup one of the GART windows to access a specific piece of memory or return
 181  * the physical address for local memory.
 182  */
 183 static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 184                                  struct ttm_resource *mem,
 185                                  struct amdgpu_res_cursor *mm_cur,
 186                                  unsigned int window, struct amdgpu_ring *ring,
 187                                  bool tmz, uint64_t *size, uint64_t *addr)
 188 {
 189         struct amdgpu_device *adev = ring->adev;
 190         unsigned int offset, num_pages, num_dw, num_bytes;
 191         uint64_t src_addr, dst_addr;
 192         struct amdgpu_job *job;
 193         void *cpu_addr;
 194         uint64_t flags;
 195         unsigned int i;
 196         int r;
 197
 198         BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
 199                AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
 200
 201         if (WARN_ON(mem->mem_type == AMDGPU_PL_PREEMPT))
 202                 return -EINVAL;
 203
 204         /* Map only what can't be accessed directly */
 205         if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) {
 206                 *addr = amdgpu_ttm_domain_start(adev, mem->mem_type) +
 207                         mm_cur->start;
 208                 return 0;
 209         }
 210
 211
 212         /*
 213          * If start begins at an offset inside the page, then adjust the size
 214          * and addr accordingly
 215          */
 216         offset = mm_cur->start & ~PAGE_MASK;
 217
 218         num_pages = PFN_UP(*size + offset);
 219         num_pages = min_t(uint32_t, num_pages, AMDGPU_GTT_MAX_TRANSFER_SIZE);
 220
 221         *size = min(*size, (uint64_t)num_pages * PAGE_SIZE - offset);
 222
 223         *addr = adev->gmc.gart_start;
 224         *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
 225                 AMDGPU_GPU_PAGE_SIZE;
 226         *addr += offset;
 227
 228         num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
 229         num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
 230
 231         r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr,
 232                                      AMDGPU_FENCE_OWNER_UNDEFINED,
 233                                      num_dw * 4 + num_bytes,
 234                                      AMDGPU_IB_POOL_DELAYED, &job);
 235         if (r)
 236                 return r;
 237
 238         src_addr = num_dw * 4;
 239         src_addr += job->ibs[0].gpu_addr;
 240
 241         dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
 242         dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
 243         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
 244                                 dst_addr, num_bytes, false);
 245
 246         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
 247         WARN_ON(job->ibs[0].length_dw > num_dw);
 248
 249         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
 250         if (tmz)
 251                 flags |= AMDGPU_PTE_TMZ;
 252
 253         cpu_addr = &job->ibs[0].ptr[num_dw];
 254
 255         if (mem->mem_type == TTM_PL_TT) {
 256                 dma_addr_t *dma_addr;
 257
 258                 dma_addr = &bo->ttm->dma_address[mm_cur->start >> PAGE_SHIFT];
 259                 amdgpu_gart_map(adev, 0, num_pages, dma_addr, flags, cpu_addr);
 260         } else {
 261                 dma_addr_t dma_address;
 262
 263                 dma_address = mm_cur->start;
 264                 dma_address += adev->vm_manager.vram_base_offset;
 265
 266                 for (i = 0; i < num_pages; ++i) {
 267                         amdgpu_gart_map(adev, i << PAGE_SHIFT, 1, &dma_address,
 268                                         flags, cpu_addr);
 269                         dma_address += PAGE_SIZE;
 270                 }
 271         }
 272
 273         dma_fence_put(amdgpu_job_submit(job));
 274         return 0;
 275 }
 276
 277 /**
 278  * amdgpu_ttm_copy_mem_to_mem - Helper function for copy
 279  * @adev: amdgpu device
 280  * @src: buffer/address where to read from
 281  * @dst: buffer/address where to write to
 282  * @size: number of bytes to copy
 283  * @tmz: if a secure copy should be used
 284  * @resv: resv object to sync to
 285  * @f: Returns the last fence if multiple jobs are submitted.
 286  *
 287  * The function copies @size bytes from {src->mem + src->offset} to
 288  * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
 289  * move and different for a BO to BO copy.
 290  *
 291  */
 292 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 293                                const struct amdgpu_copy_mem *src,
 294                                const struct amdgpu_copy_mem *dst,
 295                                uint64_t size, bool tmz,
 296                                struct dma_resv *resv,
 297                                struct dma_fence **f)
 298 {
 299         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
 300         struct amdgpu_res_cursor src_mm, dst_mm;
 301         struct dma_fence *fence = NULL;
 302         int r = 0;
 303
 304         if (!adev->mman.buffer_funcs_enabled) {
 305                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 306                 return -EINVAL;
 307         }
 308
 309         amdgpu_res_first(src->mem, src->offset, size, &src_mm);
 310         amdgpu_res_first(dst->mem, dst->offset, size, &dst_mm);
 311
 312         mutex_lock(&adev->mman.gtt_window_lock);
 313         while (src_mm.remaining) {
 314                 uint64_t from, to, cur_size;
 315                 struct dma_fence *next;
 316
 317                 /* Never copy more than 256MiB at once to avoid a timeout */
 318                 cur_size = min3(src_mm.size, dst_mm.size, 256ULL << 20);
 319
 320                 /* Map src to window 0 and dst to window 1. */
 321                 r = amdgpu_ttm_map_buffer(src->bo, src->mem, &src_mm,
 322                                           0, ring, tmz, &cur_size, &from);
 323                 if (r)
 324                         goto error;
 325
 326                 r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, &dst_mm,
 327                                           1, ring, tmz, &cur_size, &to);
 328                 if (r)
 329                         goto error;
 330
 331                 r = amdgpu_copy_buffer(ring, from, to, cur_size,
 332                                        resv, &next, false, true, tmz);
 333                 if (r)
 334                         goto error;
 335
 336                 dma_fence_put(fence);
 337                 fence = next;
 338
 339                 amdgpu_res_next(&src_mm, cur_size);
 340                 amdgpu_res_next(&dst_mm, cur_size);
 341         }
 342 error:
 343         mutex_unlock(&adev->mman.gtt_window_lock);
 344         if (f)
 345                 *f = dma_fence_get(fence);
 346         dma_fence_put(fence);
 347         return r;
 348 }
 349
 350 /*
 351  * amdgpu_move_blit - Copy an entire buffer to another buffer
 352  *
 353  * This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to
 354  * help move buffers to and from VRAM.
 355  */
 356 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 357                             bool evict,
 358                             struct ttm_resource *new_mem,
 359                             struct ttm_resource *old_mem)
 360 {
 361         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 362         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 363         struct amdgpu_copy_mem src, dst;
 364         struct dma_fence *fence = NULL;
 365         int r;
 366
 367         src.bo = bo;
 368         dst.bo = bo;
 369         src.mem = old_mem;
 370         dst.mem = new_mem;
 371         src.offset = 0;
 372         dst.offset = 0;
 373
 374         r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
 375                                        new_mem->size,
 376                                        amdgpu_bo_encrypted(abo),
 377                                        bo->base.resv, &fence);
 378         if (r)
 379                 goto error;
 380
 381         /* clear the space being freed */
 382         if (old_mem->mem_type == TTM_PL_VRAM &&
 383             (abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) {
 384                 struct dma_fence *wipe_fence = NULL;
 385
 386                 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, NULL, &wipe_fence,
 387                                         false);
 388                 if (r) {
 389                         goto error;
 390                 } else if (wipe_fence) {
 391                         dma_fence_put(fence);
 392                         fence = wipe_fence;
 393                 }
 394         }
 395
 396         /* Always block for VM page tables before committing the new location */
 397         if (bo->type == ttm_bo_type_kernel)
 398                 r = ttm_bo_move_accel_cleanup(bo, fence, true, false, new_mem);
 399         else
 400                 r = ttm_bo_move_accel_cleanup(bo, fence, evict, true, new_mem);
 401         dma_fence_put(fence);
 402         return r;
 403
 404 error:
 405         if (fence)
 406                 dma_fence_wait(fence, false);
 407         dma_fence_put(fence);
 408         return r;
 409 }
 410
 411 /*
 412  * amdgpu_mem_visible - Check that memory can be accessed by ttm_bo_move_memcpy
 413  *
 414  * Called by amdgpu_bo_move()
 415  */
 416 static bool amdgpu_mem_visible(struct amdgpu_device *adev,
 417                                struct ttm_resource *mem)
 418 {
 419         u64 mem_size = (u64)mem->size;
 420         struct amdgpu_res_cursor cursor;
 421         u64 end;
 422
 423         if (mem->mem_type == TTM_PL_SYSTEM ||
 424             mem->mem_type == TTM_PL_TT)
 425                 return true;
 426         if (mem->mem_type != TTM_PL_VRAM)
 427                 return false;
 428
 429         amdgpu_res_first(mem, 0, mem_size, &cursor);
 430         end = cursor.start + cursor.size;
 431         while (cursor.remaining) {
 432                 amdgpu_res_next(&cursor, cursor.size);
 433
 434                 if (!cursor.remaining)
 435                         break;
 436
 437                 /* ttm_resource_ioremap only supports contiguous memory */
 438                 if (end != cursor.start)
 439                         return false;
 440
 441                 end = cursor.start + cursor.size;
 442         }
 443
 444         return end <= adev->gmc.visible_vram_size;
 445 }
 446
 447 /*
 448  * amdgpu_bo_move - Move a buffer object to a new memory location
 449  *
 450  * Called by ttm_bo_handle_move_mem()
 451  */
 452 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
 453                           struct ttm_operation_ctx *ctx,
 454                           struct ttm_resource *new_mem,
 455                           struct ttm_place *hop)
 456 {
 457         struct amdgpu_device *adev;
 458         struct amdgpu_bo *abo;
 459         struct ttm_resource *old_mem = bo->resource;
 460         int r;
 461
 462         if (new_mem->mem_type == TTM_PL_TT ||
 463             new_mem->mem_type == AMDGPU_PL_PREEMPT) {
 464                 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem);
 465                 if (r)
 466                         return r;
 467         }
 468
 469         abo = ttm_to_amdgpu_bo(bo);
 470         adev = amdgpu_ttm_adev(bo->bdev);
 471
 472         if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
 473                          bo->ttm == NULL)) {
 474                 ttm_bo_move_null(bo, new_mem);
 475                 goto out;
 476         }
 477         if (old_mem->mem_type == TTM_PL_SYSTEM &&
 478             (new_mem->mem_type == TTM_PL_TT ||
 479              new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
 480                 ttm_bo_move_null(bo, new_mem);
 481                 goto out;
 482         }
 483         if ((old_mem->mem_type == TTM_PL_TT ||
 484              old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
 485             new_mem->mem_type == TTM_PL_SYSTEM) {
 486                 r = ttm_bo_wait_ctx(bo, ctx);
 487                 if (r)
 488                         return r;
 489
 490                 amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm);
 491                 ttm_resource_free(bo, &bo->resource);
 492                 ttm_bo_assign_mem(bo, new_mem);
 493                 goto out;
 494         }
 495
 496         if (old_mem->mem_type == AMDGPU_PL_GDS ||
 497             old_mem->mem_type == AMDGPU_PL_GWS ||
 498             old_mem->mem_type == AMDGPU_PL_OA ||
 499             old_mem->mem_type == AMDGPU_PL_DOORBELL ||
 500             new_mem->mem_type == AMDGPU_PL_GDS ||
 501             new_mem->mem_type == AMDGPU_PL_GWS ||
 502             new_mem->mem_type == AMDGPU_PL_OA ||
 503             new_mem->mem_type == AMDGPU_PL_DOORBELL) {
 504                 /* Nothing to save here */
 505                 ttm_bo_move_null(bo, new_mem);
 506                 goto out;
 507         }
 508
 509         if (bo->type == ttm_bo_type_device &&
 510             new_mem->mem_type == TTM_PL_VRAM &&
 511             old_mem->mem_type != TTM_PL_VRAM) {
 512                 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
 513                  * accesses the BO after it's moved.
 514                  */
 515                 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 516         }
 517
 518         if (adev->mman.buffer_funcs_enabled) {
 519                 if (((old_mem->mem_type == TTM_PL_SYSTEM &&
 520                       new_mem->mem_type == TTM_PL_VRAM) ||
 521                      (old_mem->mem_type == TTM_PL_VRAM &&
 522                       new_mem->mem_type == TTM_PL_SYSTEM))) {
 523                         hop->fpfn = 0;
 524                         hop->lpfn = 0;
 525                         hop->mem_type = TTM_PL_TT;
 526                         hop->flags = TTM_PL_FLAG_TEMPORARY;
 527                         return -EMULTIHOP;
 528                 }
 529
 530                 r = amdgpu_move_blit(bo, evict, new_mem, old_mem);
 531         } else {
 532                 r = -ENODEV;
 533         }
 534
 535         if (r) {
 536                 /* Check that all memory is CPU accessible */
 537                 if (!amdgpu_mem_visible(adev, old_mem) ||
 538                     !amdgpu_mem_visible(adev, new_mem)) {
 539                         pr_err("Move buffer fallback to memcpy unavailable\n");
 540                         return r;
 541                 }
 542
 543                 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
 544                 if (r)
 545                         return r;
 546         }
 547
 548         trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
 549 out:
 550         /* update statistics */
 551         atomic64_add(bo->base.size, &adev->num_bytes_moved);
 552         amdgpu_bo_move_notify(bo, evict);
 553         return 0;
 554 }
 555
 556 /*
 557  * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
 558  *
 559  * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
 560  */
 561 static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
 562                                      struct ttm_resource *mem)
 563 {
 564         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 565         size_t bus_size = (size_t)mem->size;
 566
 567         switch (mem->mem_type) {
 568         case TTM_PL_SYSTEM:
 569                 /* system memory */
 570                 return 0;
 571         case TTM_PL_TT:
 572         case AMDGPU_PL_PREEMPT:
 573                 break;
 574         case TTM_PL_VRAM:
 575                 mem->bus.offset = mem->start << PAGE_SHIFT;
 576                 /* check if it's visible */
 577                 if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size)
 578                         return -EINVAL;
 579
 580                 if (adev->mman.aper_base_kaddr &&
 581                     mem->placement & TTM_PL_FLAG_CONTIGUOUS)
 582                         mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
 583                                         mem->bus.offset;
 584
 585                 mem->bus.offset += adev->gmc.aper_base;
 586                 mem->bus.is_iomem = true;
 587                 break;
 588         case AMDGPU_PL_DOORBELL:
 589                 mem->bus.offset = mem->start << PAGE_SHIFT;
 590                 mem->bus.offset += adev->doorbell.base;
 591                 mem->bus.is_iomem = true;
 592                 mem->bus.caching = ttm_uncached;
 593                 break;
 594         default:
 595                 return -EINVAL;
 596         }
 597         return 0;
 598 }
 599
 600 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
 601                                            unsigned long page_offset)
 602 {
 603         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 604         struct amdgpu_res_cursor cursor;
 605
 606         amdgpu_res_first(bo->resource, (u64)page_offset << PAGE_SHIFT, 0,
 607                          &cursor);
 608
 609         if (bo->resource->mem_type == AMDGPU_PL_DOORBELL)
 610                 return ((uint64_t)(adev->doorbell.base + cursor.start)) >> PAGE_SHIFT;
 611
 612         return (adev->gmc.aper_base + cursor.start) >> PAGE_SHIFT;
 613 }
 614
 615 /**
 616  * amdgpu_ttm_domain_start - Returns GPU start address
 617  * @adev: amdgpu device object
 618  * @type: type of the memory
 619  *
 620  * Returns:
 621  * GPU start address of a memory domain
 622  */
 623
 624 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type)
 625 {
 626         switch (type) {
 627         case TTM_PL_TT:
 628                 return adev->gmc.gart_start;
 629         case TTM_PL_VRAM:
 630                 return adev->gmc.vram_start;
 631         }
 632
 633         return 0;
 634 }
 635
 636 /*
 637  * TTM backend functions.
 638  */
 639 struct amdgpu_ttm_tt {
 640         struct ttm_tt   ttm;
 641         struct drm_gem_object   *gobj;
 642         u64                     offset;
 643         uint64_t                userptr;
 644         struct task_struct      *usertask;
 645         uint32_t                userflags;
 646         bool                    bound;
 647         int32_t                 pool_id;
 648 };
 649
 650 #define ttm_to_amdgpu_ttm_tt(ptr)       container_of(ptr, struct amdgpu_ttm_tt, ttm)
 651
 652 #ifdef CONFIG_DRM_AMDGPU_USERPTR
 653 /*
 654  * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user
 655  * memory and start HMM tracking CPU page table update
 656  *
 657  * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only
 658  * once afterwards to stop HMM tracking
 659  */
 660 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages,
 661                                  struct hmm_range **range)
 662 {
 663         struct ttm_tt *ttm = bo->tbo.ttm;
 664         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 665         unsigned long start = gtt->userptr;
 666         struct vm_area_struct *vma;
 667         struct mm_struct *mm;
 668         bool readonly;
 669         int r = 0;
 670
 671         /* Make sure get_user_pages_done() can cleanup gracefully */
 672         *range = NULL;
 673
 674         mm = bo->notifier.mm;
 675         if (unlikely(!mm)) {
 676                 DRM_DEBUG_DRIVER("BO is not registered?\n");
 677                 return -EFAULT;
 678         }
 679
 680         if (!mmget_not_zero(mm)) /* Happens during process shutdown */
 681                 return -ESRCH;
 682
 683         mmap_read_lock(mm);
 684         vma = vma_lookup(mm, start);
 685         if (unlikely(!vma)) {
 686                 r = -EFAULT;
 687                 goto out_unlock;
 688         }
 689         if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) &&
 690                 vma->vm_file)) {
 691                 r = -EPERM;
 692                 goto out_unlock;
 693         }
 694
 695         readonly = amdgpu_ttm_tt_is_readonly(ttm);
 696         r = amdgpu_hmm_range_get_pages(&bo->notifier, start, ttm->num_pages,
 697                                        readonly, NULL, pages, range);
 698 out_unlock:
 699         mmap_read_unlock(mm);
 700         if (r)
 701                 pr_debug("failed %d to get user pages 0x%lx\n", r, start);
 702
 703         mmput(mm);
 704
 705         return r;
 706 }
 707
 708 /* amdgpu_ttm_tt_discard_user_pages - Discard range and pfn array allocations
 709  */
 710 void amdgpu_ttm_tt_discard_user_pages(struct ttm_tt *ttm,
 711                                       struct hmm_range *range)
 712 {
 713         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 714
 715         if (gtt && gtt->userptr && range)
 716                 amdgpu_hmm_range_get_pages_done(range);
 717 }
 718
 719 /*
 720  * amdgpu_ttm_tt_get_user_pages_done - stop HMM track the CPU page table change
 721  * Check if the pages backing this ttm range have been invalidated
 722  *
 723  * Returns: true if pages are still valid
 724  */
 725 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm,
 726                                        struct hmm_range *range)
 727 {
 728         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 729
 730         if (!gtt || !gtt->userptr || !range)
 731                 return false;
 732
 733         DRM_DEBUG_DRIVER("user_pages_done 0x%llx pages 0x%x\n",
 734                 gtt->userptr, ttm->num_pages);
 735
 736         WARN_ONCE(!range->hmm_pfns, "No user pages to check\n");
 737
 738         return !amdgpu_hmm_range_get_pages_done(range);
 739 }
 740 #endif
 741
 742 /*
 743  * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
 744  *
 745  * Called by amdgpu_cs_list_validate(). This creates the page list
 746  * that backs user memory and will ultimately be mapped into the device
 747  * address space.
 748  */
 749 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
 750 {
 751         unsigned long i;
 752
 753         for (i = 0; i < ttm->num_pages; ++i)
 754                 ttm->pages[i] = pages ? pages[i] : NULL;
 755 }
 756
 757 /*
 758  * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages
 759  *
 760  * Called by amdgpu_ttm_backend_bind()
 761  **/
 762 static int amdgpu_ttm_tt_pin_userptr(struct ttm_device *bdev,
 763                                      struct ttm_tt *ttm)
 764 {
 765         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 766         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 767         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 768         enum dma_data_direction direction = write ?
 769                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 770         int r;
 771
 772         /* Allocate an SG array and squash pages into it */
 773         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 774                                       (u64)ttm->num_pages << PAGE_SHIFT,
 775                                       GFP_KERNEL);
 776         if (r)
 777                 goto release_sg;
 778
 779         /* Map SG to device */
 780         r = dma_map_sgtable(adev->dev, ttm->sg, direction, 0);
 781         if (r)
 782                 goto release_sg;
 783
 784         /* convert SG to linear array of pages and dma addresses */
 785         drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 786                                        ttm->num_pages);
 787
 788         return 0;
 789
 790 release_sg:
 791         kfree(ttm->sg);
 792         ttm->sg = NULL;
 793         return r;
 794 }
 795
 796 /*
 797  * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
 798  */
 799 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_device *bdev,
 800                                         struct ttm_tt *ttm)
 801 {
 802         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 803         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 804         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 805         enum dma_data_direction direction = write ?
 806                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 807
 808         /* double check that we don't free the table twice */
 809         if (!ttm->sg || !ttm->sg->sgl)
 810                 return;
 811
 812         /* unmap the pages mapped to the device */
 813         dma_unmap_sgtable(adev->dev, ttm->sg, direction, 0);
 814         sg_free_table(ttm->sg);
 815 }
 816
 817 /*
 818  * total_pages is constructed as MQD0+CtrlStack0 + MQD1+CtrlStack1 + ...
 819  * MQDn+CtrlStackn where n is the number of XCCs per partition.
 820  * pages_per_xcc is the size of one MQD+CtrlStack. The first page is MQD
 821  * and uses memory type default, UC. The rest of pages_per_xcc are
 822  * Ctrl stack and modify their memory type to NC.
 823  */
 824 static void amdgpu_ttm_gart_bind_gfx9_mqd(struct amdgpu_device *adev,
 825                                 struct ttm_tt *ttm, uint64_t flags)
 826 {
 827         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 828         uint64_t total_pages = ttm->num_pages;
 829         int num_xcc = max(1U, adev->gfx.num_xcc_per_xcp);
 830         uint64_t page_idx, pages_per_xcc;
 831         int i;
 832         uint64_t ctrl_flags = (flags & ~AMDGPU_PTE_MTYPE_VG10_MASK) |
 833                         AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC);
 834
 835         pages_per_xcc = total_pages;
 836         do_div(pages_per_xcc, num_xcc);
 837
 838         for (i = 0, page_idx = 0; i < num_xcc; i++, page_idx += pages_per_xcc) {
 839                 /* MQD page: use default flags */
 840                 amdgpu_gart_bind(adev,
 841                                 gtt->offset + (page_idx << PAGE_SHIFT),
 842                                 1, &gtt->ttm.dma_address[page_idx], flags);
 843                 /*
 844                  * Ctrl pages - modify the memory type to NC (ctrl_flags) from
 845                  * the second page of the BO onward.
 846                  */
 847                 amdgpu_gart_bind(adev,
 848                                 gtt->offset + ((page_idx + 1) << PAGE_SHIFT),
 849                                 pages_per_xcc - 1,
 850                                 &gtt->ttm.dma_address[page_idx + 1],
 851                                 ctrl_flags);
 852         }
 853 }
 854
 855 static void amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
 856                                  struct ttm_buffer_object *tbo,
 857                                  uint64_t flags)
 858 {
 859         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
 860         struct ttm_tt *ttm = tbo->ttm;
 861         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 862
 863         if (amdgpu_bo_encrypted(abo))
 864                 flags |= AMDGPU_PTE_TMZ;
 865
 866         if (abo->flags & AMDGPU_GEM_CREATE_CP_MQD_GFX9) {
 867                 amdgpu_ttm_gart_bind_gfx9_mqd(adev, ttm, flags);
 868         } else {
 869                 amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 870                                  gtt->ttm.dma_address, flags);
 871         }
 872 }
 873
 874 /*
 875  * amdgpu_ttm_backend_bind - Bind GTT memory
 876  *
 877  * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
 878  * This handles binding GTT memory to the device address space.
 879  */
 880 static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
 881                                    struct ttm_tt *ttm,
 882                                    struct ttm_resource *bo_mem)
 883 {
 884         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 885         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 886         uint64_t flags;
 887         int r;
 888
 889         if (!bo_mem)
 890                 return -EINVAL;
 891
 892         if (gtt->bound)
 893                 return 0;
 894
 895         if (gtt->userptr) {
 896                 r = amdgpu_ttm_tt_pin_userptr(bdev, ttm);
 897                 if (r) {
 898                         DRM_ERROR("failed to pin userptr\n");
 899                         return r;
 900                 }
 901         } else if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) {
 902                 if (!ttm->sg) {
 903                         struct dma_buf_attachment *attach;
 904                         struct sg_table *sgt;
 905
 906                         attach = gtt->gobj->import_attach;
 907                         sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
 908                         if (IS_ERR(sgt))
 909                                 return PTR_ERR(sgt);
 910
 911                         ttm->sg = sgt;
 912                 }
 913
 914                 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 915                                                ttm->num_pages);
 916         }
 917
 918         if (!ttm->num_pages) {
 919                 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
 920                      ttm->num_pages, bo_mem, ttm);
 921         }
 922
 923         if (bo_mem->mem_type != TTM_PL_TT ||
 924             !amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
 925                 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
 926                 return 0;
 927         }
 928
 929         /* compute PTE flags relevant to this BO memory */
 930         flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
 931
 932         /* bind pages into GART page tables */
 933         gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
 934         amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 935                          gtt->ttm.dma_address, flags);
 936         gtt->bound = true;
 937         return 0;
 938 }
 939
 940 /*
 941  * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either
 942  * through AGP or GART aperture.
 943  *
 944  * If bo is accessible through AGP aperture, then use AGP aperture
 945  * to access bo; otherwise allocate logical space in GART aperture
 946  * and map bo to GART aperture.
 947  */
 948 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
 949 {
 950         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 951         struct ttm_operation_ctx ctx = { false, false };
 952         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(bo->ttm);
 953         struct ttm_placement placement;
 954         struct ttm_place placements;
 955         struct ttm_resource *tmp;
 956         uint64_t addr, flags;
 957         int r;
 958
 959         if (bo->resource->start != AMDGPU_BO_INVALID_OFFSET)
 960                 return 0;
 961
 962         addr = amdgpu_gmc_agp_addr(bo);
 963         if (addr != AMDGPU_BO_INVALID_OFFSET)
 964                 return 0;
 965
 966         /* allocate GART space */
 967         placement.num_placement = 1;
 968         placement.placement = &placements;
 969         placement.num_busy_placement = 1;
 970         placement.busy_placement = &placements;
 971         placements.fpfn = 0;
 972         placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
 973         placements.mem_type = TTM_PL_TT;
 974         placements.flags = bo->resource->placement;
 975
 976         r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
 977         if (unlikely(r))
 978                 return r;
 979
 980         /* compute PTE flags for this buffer object */
 981         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, tmp);
 982
 983         /* Bind pages */
 984         gtt->offset = (u64)tmp->start << PAGE_SHIFT;
 985         amdgpu_ttm_gart_bind(adev, bo, flags);
 986         amdgpu_gart_invalidate_tlb(adev);
 987         ttm_resource_free(bo, &bo->resource);
 988         ttm_bo_assign_mem(bo, tmp);
 989
 990         return 0;
 991 }
 992
 993 /*
 994  * amdgpu_ttm_recover_gart - Rebind GTT pages
 995  *
 996  * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
 997  * rebind GTT pages during a GPU reset.
 998  */
 999 void amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
1000 {
1001         struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
1002         uint64_t flags;
1003
1004         if (!tbo->ttm)
1005                 return;
1006
1007         flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, tbo->resource);
1008         amdgpu_ttm_gart_bind(adev, tbo, flags);
1009 }
1010
1011 /*
1012  * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
1013  *
1014  * Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
1015  * ttm_tt_destroy().
1016  */
1017 static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev,
1018                                       struct ttm_tt *ttm)
1019 {
1020         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1021         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1022
1023         /* if the pages have userptr pinning then clear that first */
1024         if (gtt->userptr) {
1025                 amdgpu_ttm_tt_unpin_userptr(bdev, ttm);
1026         } else if (ttm->sg && gtt->gobj->import_attach) {
1027                 struct dma_buf_attachment *attach;
1028
1029                 attach = gtt->gobj->import_attach;
1030                 dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL);
1031                 ttm->sg = NULL;
1032         }
1033
1034         if (!gtt->bound)
1035                 return;
1036
1037         if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
1038                 return;
1039
1040         /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
1041         amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
1042         gtt->bound = false;
1043 }
1044
1045 static void amdgpu_ttm_backend_destroy(struct ttm_device *bdev,
1046                                        struct ttm_tt *ttm)
1047 {
1048         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1049
1050         if (gtt->usertask)
1051                 put_task_struct(gtt->usertask);
1052
1053         ttm_tt_fini(&gtt->ttm);
1054         kfree(gtt);
1055 }
1056
1057 /**
1058  * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
1059  *
1060  * @bo: The buffer object to create a GTT ttm_tt object around
1061  * @page_flags: Page flags to be added to the ttm_tt object
1062  *
1063  * Called by ttm_tt_create().
1064  */
1065 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
1066                                            uint32_t page_flags)
1067 {
1068         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1069         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1070         struct amdgpu_ttm_tt *gtt;
1071         enum ttm_caching caching;
1072
1073         gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
1074         if (!gtt)
1075                 return NULL;
1076
1077         gtt->gobj = &bo->base;
1078         if (adev->gmc.mem_partitions && abo->xcp_id >= 0)
1079                 gtt->pool_id = KFD_XCP_MEM_ID(adev, abo->xcp_id);
1080         else
1081                 gtt->pool_id = abo->xcp_id;
1082
1083         if (abo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
1084                 caching = ttm_write_combined;
1085         else
1086                 caching = ttm_cached;
1087
1088         /* allocate space for the uninitialized page entries */
1089         if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags, caching)) {
1090                 kfree(gtt);
1091                 return NULL;
1092         }
1093         return &gtt->ttm;
1094 }
1095
1096 /*
1097  * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
1098  *
1099  * Map the pages of a ttm_tt object to an address space visible
1100  * to the underlying device.
1101  */
1102 static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
1103                                   struct ttm_tt *ttm,
1104                                   struct ttm_operation_ctx *ctx)
1105 {
1106         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1107         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1108         struct ttm_pool *pool;
1109         pgoff_t i;
1110         int ret;
1111
1112         /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
1113         if (gtt->userptr) {
1114                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1115                 if (!ttm->sg)
1116                         return -ENOMEM;
1117                 return 0;
1118         }
1119
1120         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1121                 return 0;
1122
1123         if (adev->mman.ttm_pools && gtt->pool_id >= 0)
1124                 pool = &adev->mman.ttm_pools[gtt->pool_id];
1125         else
1126                 pool = &adev->mman.bdev.pool;
1127         ret = ttm_pool_alloc(pool, ttm, ctx);
1128         if (ret)
1129                 return ret;
1130
1131         for (i = 0; i < ttm->num_pages; ++i)
1132                 ttm->pages[i]->mapping = bdev->dev_mapping;
1133
1134         return 0;
1135 }
1136
1137 /*
1138  * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
1139  *
1140  * Unmaps pages of a ttm_tt object from the device address space and
1141  * unpopulates the page array backing it.
1142  */
1143 static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
1144                                      struct ttm_tt *ttm)
1145 {
1146         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1147         struct amdgpu_device *adev;
1148         struct ttm_pool *pool;
1149         pgoff_t i;
1150
1151         amdgpu_ttm_backend_unbind(bdev, ttm);
1152
1153         if (gtt->userptr) {
1154                 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1155                 kfree(ttm->sg);
1156                 ttm->sg = NULL;
1157                 return;
1158         }
1159
1160         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1161                 return;
1162
1163         for (i = 0; i < ttm->num_pages; ++i)
1164                 ttm->pages[i]->mapping = NULL;
1165
1166         adev = amdgpu_ttm_adev(bdev);
1167
1168         if (adev->mman.ttm_pools && gtt->pool_id >= 0)
1169                 pool = &adev->mman.ttm_pools[gtt->pool_id];
1170         else
1171                 pool = &adev->mman.bdev.pool;
1172
1173         return ttm_pool_free(pool, ttm);
1174 }
1175
1176 /**
1177  * amdgpu_ttm_tt_get_userptr - Return the userptr GTT ttm_tt for the current
1178  * task
1179  *
1180  * @tbo: The ttm_buffer_object that contains the userptr
1181  * @user_addr:  The returned value
1182  */
1183 int amdgpu_ttm_tt_get_userptr(const struct ttm_buffer_object *tbo,
1184                               uint64_t *user_addr)
1185 {
1186         struct amdgpu_ttm_tt *gtt;
1187
1188         if (!tbo->ttm)
1189                 return -EINVAL;
1190
1191         gtt = (void *)tbo->ttm;
1192         *user_addr = gtt->userptr;
1193         return 0;
1194 }
1195
1196 /**
1197  * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
1198  * task
1199  *
1200  * @bo: The ttm_buffer_object to bind this userptr to
1201  * @addr:  The address in the current tasks VM space to use
1202  * @flags: Requirements of userptr object.
1203  *
1204  * Called by amdgpu_gem_userptr_ioctl() and kfd_ioctl_alloc_memory_of_gpu() to
1205  * bind userptr pages to current task and by kfd_ioctl_acquire_vm() to
1206  * initialize GPU VM for a KFD process.
1207  */
1208 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
1209                               uint64_t addr, uint32_t flags)
1210 {
1211         struct amdgpu_ttm_tt *gtt;
1212
1213         if (!bo->ttm) {
1214                 /* TODO: We want a separate TTM object type for userptrs */
1215                 bo->ttm = amdgpu_ttm_tt_create(bo, 0);
1216                 if (bo->ttm == NULL)
1217                         return -ENOMEM;
1218         }
1219
1220         /* Set TTM_TT_FLAG_EXTERNAL before populate but after create. */
1221         bo->ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
1222
1223         gtt = ttm_to_amdgpu_ttm_tt(bo->ttm);
1224         gtt->userptr = addr;
1225         gtt->userflags = flags;
1226
1227         if (gtt->usertask)
1228                 put_task_struct(gtt->usertask);
1229         gtt->usertask = current->group_leader;
1230         get_task_struct(gtt->usertask);
1231
1232         return 0;
1233 }
1234
1235 /*
1236  * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
1237  */
1238 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1239 {
1240         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1241
1242         if (gtt == NULL)
1243                 return NULL;
1244
1245         if (gtt->usertask == NULL)
1246                 return NULL;
1247
1248         return gtt->usertask->mm;
1249 }
1250
1251 /*
1252  * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
1253  * address range for the current task.
1254  *
1255  */
1256 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1257                                   unsigned long end, unsigned long *userptr)
1258 {
1259         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1260         unsigned long size;
1261
1262         if (gtt == NULL || !gtt->userptr)
1263                 return false;
1264
1265         /* Return false if no part of the ttm_tt object lies within
1266          * the range
1267          */
1268         size = (unsigned long)gtt->ttm.num_pages * PAGE_SIZE;
1269         if (gtt->userptr > end || gtt->userptr + size <= start)
1270                 return false;
1271
1272         if (userptr)
1273                 *userptr = gtt->userptr;
1274         return true;
1275 }
1276
1277 /*
1278  * amdgpu_ttm_tt_is_userptr - Have the pages backing by userptr?
1279  */
1280 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm)
1281 {
1282         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1283
1284         if (gtt == NULL || !gtt->userptr)
1285                 return false;
1286
1287         return true;
1288 }
1289
1290 /*
1291  * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
1292  */
1293 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1294 {
1295         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1296
1297         if (gtt == NULL)
1298                 return false;
1299
1300         return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1301 }
1302
1303 /**
1304  * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object
1305  *
1306  * @ttm: The ttm_tt object to compute the flags for
1307  * @mem: The memory registry backing this ttm_tt object
1308  *
1309  * Figure out the flags to use for a VM PDE (Page Directory Entry).
1310  */
1311 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
1312 {
1313         uint64_t flags = 0;
1314
1315         if (mem && mem->mem_type != TTM_PL_SYSTEM)
1316                 flags |= AMDGPU_PTE_VALID;
1317
1318         if (mem && (mem->mem_type == TTM_PL_TT ||
1319                     mem->mem_type == AMDGPU_PL_DOORBELL ||
1320                     mem->mem_type == AMDGPU_PL_PREEMPT)) {
1321                 flags |= AMDGPU_PTE_SYSTEM;
1322
1323                 if (ttm->caching == ttm_cached)
1324                         flags |= AMDGPU_PTE_SNOOPED;
1325         }
1326
1327         if (mem && mem->mem_type == TTM_PL_VRAM &&
1328                         mem->bus.caching == ttm_cached)
1329                 flags |= AMDGPU_PTE_SNOOPED;
1330
1331         return flags;
1332 }
1333
1334 /**
1335  * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
1336  *
1337  * @adev: amdgpu_device pointer
1338  * @ttm: The ttm_tt object to compute the flags for
1339  * @mem: The memory registry backing this ttm_tt object
1340  *
1341  * Figure out the flags to use for a VM PTE (Page Table Entry).
1342  */
1343 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1344                                  struct ttm_resource *mem)
1345 {
1346         uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
1347
1348         flags |= adev->gart.gart_pte_flags;
1349         flags |= AMDGPU_PTE_READABLE;
1350
1351         if (!amdgpu_ttm_tt_is_readonly(ttm))
1352                 flags |= AMDGPU_PTE_WRITEABLE;
1353
1354         return flags;
1355 }
1356
1357 /*
1358  * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
1359  * object.
1360  *
1361  * Return true if eviction is sensible. Called by ttm_mem_evict_first() on
1362  * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
1363  * it can find space for a new object and by ttm_bo_force_list_clean() which is
1364  * used to clean out a memory space.
1365  */
1366 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1367                                             const struct ttm_place *place)
1368 {
1369         struct dma_resv_iter resv_cursor;
1370         struct dma_fence *f;
1371
1372         if (!amdgpu_bo_is_amdgpu_bo(bo))
1373                 return ttm_bo_eviction_valuable(bo, place);
1374
1375         /* Swapout? */
1376         if (bo->resource->mem_type == TTM_PL_SYSTEM)
1377                 return true;
1378
1379         if (bo->type == ttm_bo_type_kernel &&
1380             !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
1381                 return false;
1382
1383         /* If bo is a KFD BO, check if the bo belongs to the current process.
1384          * If true, then return false as any KFD process needs all its BOs to
1385          * be resident to run successfully
1386          */
1387         dma_resv_for_each_fence(&resv_cursor, bo->base.resv,
1388                                 DMA_RESV_USAGE_BOOKKEEP, f) {
1389                 if (amdkfd_fence_check_mm(f, current->mm))
1390                         return false;
1391         }
1392
1393         /* Preemptible BOs don't own system resources managed by the
1394          * driver (pages, VRAM, GART space). They point to resources
1395          * owned by someone else (e.g. pageable memory in user mode
1396          * or a DMABuf). They are used in a preemptible context so we
1397          * can guarantee no deadlocks and good QoS in case of MMU
1398          * notifiers or DMABuf move notifiers from the resource owner.
1399          */
1400         if (bo->resource->mem_type == AMDGPU_PL_PREEMPT)
1401                 return false;
1402
1403         if (bo->resource->mem_type == TTM_PL_TT &&
1404             amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
1405                 return false;
1406
1407         return ttm_bo_eviction_valuable(bo, place);
1408 }
1409
1410 static void amdgpu_ttm_vram_mm_access(struct amdgpu_device *adev, loff_t pos,
1411                                       void *buf, size_t size, bool write)
1412 {
1413         while (size) {
1414                 uint64_t aligned_pos = ALIGN_DOWN(pos, 4);
1415                 uint64_t bytes = 4 - (pos & 0x3);
1416                 uint32_t shift = (pos & 0x3) * 8;
1417                 uint32_t mask = 0xffffffff << shift;
1418                 uint32_t value = 0;
1419
1420                 if (size < bytes) {
1421                         mask &= 0xffffffff >> (bytes - size) * 8;
1422                         bytes = size;
1423                 }
1424
1425                 if (mask != 0xffffffff) {
1426                         amdgpu_device_mm_access(adev, aligned_pos, &value, 4, false);
1427                         if (write) {
1428                                 value &= ~mask;
1429                                 value |= (*(uint32_t *)buf << shift) & mask;
1430                                 amdgpu_device_mm_access(adev, aligned_pos, &value, 4, true);
1431                         } else {
1432                                 value = (value & mask) >> shift;
1433                                 memcpy(buf, &value, bytes);
1434                         }
1435                 } else {
1436                         amdgpu_device_mm_access(adev, aligned_pos, buf, 4, write);
1437                 }
1438
1439                 pos += bytes;
1440                 buf += bytes;
1441                 size -= bytes;
1442         }
1443 }
1444
1445 static int amdgpu_ttm_access_memory_sdma(struct ttm_buffer_object *bo,
1446                                         unsigned long offset, void *buf,
1447                                         int len, int write)
1448 {
1449         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1450         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1451         struct amdgpu_res_cursor src_mm;
1452         struct amdgpu_job *job;
1453         struct dma_fence *fence;
1454         uint64_t src_addr, dst_addr;
1455         unsigned int num_dw;
1456         int r, idx;
1457
1458         if (len != PAGE_SIZE)
1459                 return -EINVAL;
1460
1461         if (!adev->mman.sdma_access_ptr)
1462                 return -EACCES;
1463
1464         if (!drm_dev_enter(adev_to_drm(adev), &idx))
1465                 return -ENODEV;
1466
1467         if (write)
1468                 memcpy(adev->mman.sdma_access_ptr, buf, len);
1469
1470         num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
1471         r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr,
1472                                      AMDGPU_FENCE_OWNER_UNDEFINED,
1473                                      num_dw * 4, AMDGPU_IB_POOL_DELAYED,
1474                                      &job);
1475         if (r)
1476                 goto out;
1477
1478         amdgpu_res_first(abo->tbo.resource, offset, len, &src_mm);
1479         src_addr = amdgpu_ttm_domain_start(adev, bo->resource->mem_type) +
1480                 src_mm.start;
1481         dst_addr = amdgpu_bo_gpu_offset(adev->mman.sdma_access_bo);
1482         if (write)
1483                 swap(src_addr, dst_addr);
1484
1485         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, dst_addr,
1486                                 PAGE_SIZE, false);
1487
1488         amdgpu_ring_pad_ib(adev->mman.buffer_funcs_ring, &job->ibs[0]);
1489         WARN_ON(job->ibs[0].length_dw > num_dw);
1490
1491         fence = amdgpu_job_submit(job);
1492
1493         if (!dma_fence_wait_timeout(fence, false, adev->sdma_timeout))
1494                 r = -ETIMEDOUT;
1495         dma_fence_put(fence);
1496
1497         if (!(r || write))
1498                 memcpy(buf, adev->mman.sdma_access_ptr, len);
1499 out:
1500         drm_dev_exit(idx);
1501         return r;
1502 }
1503
1504 /**
1505  * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
1506  *
1507  * @bo:  The buffer object to read/write
1508  * @offset:  Offset into buffer object
1509  * @buf:  Secondary buffer to write/read from
1510  * @len: Length in bytes of access
1511  * @write:  true if writing
1512  *
1513  * This is used to access VRAM that backs a buffer object via MMIO
1514  * access for debugging purposes.
1515  */
1516 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1517                                     unsigned long offset, void *buf, int len,
1518                                     int write)
1519 {
1520         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1521         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1522         struct amdgpu_res_cursor cursor;
1523         int ret = 0;
1524
1525         if (bo->resource->mem_type != TTM_PL_VRAM)
1526                 return -EIO;
1527
1528         if (amdgpu_device_has_timeouts_enabled(adev) &&
1529                         !amdgpu_ttm_access_memory_sdma(bo, offset, buf, len, write))
1530                 return len;
1531
1532         amdgpu_res_first(bo->resource, offset, len, &cursor);
1533         while (cursor.remaining) {
1534                 size_t count, size = cursor.size;
1535                 loff_t pos = cursor.start;
1536
1537                 count = amdgpu_device_aper_access(adev, pos, buf, size, write);
1538                 size -= count;
1539                 if (size) {
1540                         /* using MM to access rest vram and handle un-aligned address */
1541                         pos += count;
1542                         buf += count;
1543                         amdgpu_ttm_vram_mm_access(adev, pos, buf, size, write);
1544                 }
1545
1546                 ret += cursor.size;
1547                 buf += cursor.size;
1548                 amdgpu_res_next(&cursor, cursor.size);
1549         }
1550
1551         return ret;
1552 }
1553
1554 static void
1555 amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo)
1556 {
1557         amdgpu_bo_move_notify(bo, false);
1558 }
1559
1560 static struct ttm_device_funcs amdgpu_bo_driver = {
1561         .ttm_tt_create = &amdgpu_ttm_tt_create,
1562         .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1563         .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1564         .ttm_tt_destroy = &amdgpu_ttm_backend_destroy,
1565         .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1566         .evict_flags = &amdgpu_evict_flags,
1567         .move = &amdgpu_bo_move,
1568         .delete_mem_notify = &amdgpu_bo_delete_mem_notify,
1569         .release_notify = &amdgpu_bo_release_notify,
1570         .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1571         .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1572         .access_memory = &amdgpu_ttm_access_memory,
1573 };
1574
1575 /*
1576  * Firmware Reservation functions
1577  */
1578 /**
1579  * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1580  *
1581  * @adev: amdgpu_device pointer
1582  *
1583  * free fw reserved vram if it has been reserved.
1584  */
1585 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1586 {
1587         amdgpu_bo_free_kernel(&adev->mman.fw_vram_usage_reserved_bo,
1588                 NULL, &adev->mman.fw_vram_usage_va);
1589 }
1590
1591 /*
1592  * Driver Reservation functions
1593  */
1594 /**
1595  * amdgpu_ttm_drv_reserve_vram_fini - free drv reserved vram
1596  *
1597  * @adev: amdgpu_device pointer
1598  *
1599  * free drv reserved vram if it has been reserved.
1600  */
1601 static void amdgpu_ttm_drv_reserve_vram_fini(struct amdgpu_device *adev)
1602 {
1603         amdgpu_bo_free_kernel(&adev->mman.drv_vram_usage_reserved_bo,
1604                                                   NULL,
1605                                                   &adev->mman.drv_vram_usage_va);
1606 }
1607
1608 /**
1609  * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1610  *
1611  * @adev: amdgpu_device pointer
1612  *
1613  * create bo vram reservation from fw.
1614  */
1615 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1616 {
1617         uint64_t vram_size = adev->gmc.visible_vram_size;
1618
1619         adev->mman.fw_vram_usage_va = NULL;
1620         adev->mman.fw_vram_usage_reserved_bo = NULL;
1621
1622         if (adev->mman.fw_vram_usage_size == 0 ||
1623             adev->mman.fw_vram_usage_size > vram_size)
1624                 return 0;
1625
1626         return amdgpu_bo_create_kernel_at(adev,
1627                                           adev->mman.fw_vram_usage_start_offset,
1628                                           adev->mman.fw_vram_usage_size,
1629                                           &adev->mman.fw_vram_usage_reserved_bo,
1630                                           &adev->mman.fw_vram_usage_va);
1631 }
1632
1633 /**
1634  * amdgpu_ttm_drv_reserve_vram_init - create bo vram reservation from driver
1635  *
1636  * @adev: amdgpu_device pointer
1637  *
1638  * create bo vram reservation from drv.
1639  */
1640 static int amdgpu_ttm_drv_reserve_vram_init(struct amdgpu_device *adev)
1641 {
1642         u64 vram_size = adev->gmc.visible_vram_size;
1643
1644         adev->mman.drv_vram_usage_va = NULL;
1645         adev->mman.drv_vram_usage_reserved_bo = NULL;
1646
1647         if (adev->mman.drv_vram_usage_size == 0 ||
1648             adev->mman.drv_vram_usage_size > vram_size)
1649                 return 0;
1650
1651         return amdgpu_bo_create_kernel_at(adev,
1652                                           adev->mman.drv_vram_usage_start_offset,
1653                                           adev->mman.drv_vram_usage_size,
1654                                           &adev->mman.drv_vram_usage_reserved_bo,
1655                                           &adev->mman.drv_vram_usage_va);
1656 }
1657
1658 /*
1659  * Memoy training reservation functions
1660  */
1661
1662 /**
1663  * amdgpu_ttm_training_reserve_vram_fini - free memory training reserved vram
1664  *
1665  * @adev: amdgpu_device pointer
1666  *
1667  * free memory training reserved vram if it has been reserved.
1668  */
1669 static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev)
1670 {
1671         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1672
1673         ctx->init = PSP_MEM_TRAIN_NOT_SUPPORT;
1674         amdgpu_bo_free_kernel(&ctx->c2p_bo, NULL, NULL);
1675         ctx->c2p_bo = NULL;
1676
1677         return 0;
1678 }
1679
1680 static void amdgpu_ttm_training_data_block_init(struct amdgpu_device *adev,
1681                                                 uint32_t reserve_size)
1682 {
1683         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1684
1685         memset(ctx, 0, sizeof(*ctx));
1686
1687         ctx->c2p_train_data_offset =
1688                 ALIGN((adev->gmc.mc_vram_size - reserve_size - SZ_1M), SZ_1M);
1689         ctx->p2c_train_data_offset =
1690                 (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET);
1691         ctx->train_data_size =
1692                 GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES;
1693
1694         DRM_DEBUG("train_data_size:%llx,p2c_train_data_offset:%llx,c2p_train_data_offset:%llx.\n",
1695                         ctx->train_data_size,
1696                         ctx->p2c_train_data_offset,
1697                         ctx->c2p_train_data_offset);
1698 }
1699
1700 /*
1701  * reserve TMR memory at the top of VRAM which holds
1702  * IP Discovery data and is protected by PSP.
1703  */
1704 static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
1705 {
1706         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1707         bool mem_train_support = false;
1708         uint32_t reserve_size = 0;
1709         int ret;
1710
1711         if (adev->bios && !amdgpu_sriov_vf(adev)) {
1712                 if (amdgpu_atomfirmware_mem_training_supported(adev))
1713                         mem_train_support = true;
1714                 else
1715                         DRM_DEBUG("memory training does not support!\n");
1716         }
1717
1718         /*
1719          * Query reserved tmr size through atom firmwareinfo for Sienna_Cichlid and onwards for all
1720          * the use cases (IP discovery/G6 memory training/profiling/diagnostic data.etc)
1721          *
1722          * Otherwise, fallback to legacy approach to check and reserve tmr block for ip
1723          * discovery data and G6 memory training data respectively
1724          */
1725         if (adev->bios)
1726                 reserve_size =
1727                         amdgpu_atomfirmware_get_fw_reserved_fb_size(adev);
1728
1729         if (!adev->bios &&
1730             amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 3))
1731                 reserve_size = max(reserve_size, (uint32_t)280 << 20);
1732         else if (!reserve_size)
1733                 reserve_size = DISCOVERY_TMR_OFFSET;
1734
1735         if (mem_train_support) {
1736                 /* reserve vram for mem train according to TMR location */
1737                 amdgpu_ttm_training_data_block_init(adev, reserve_size);
1738                 ret = amdgpu_bo_create_kernel_at(adev,
1739                                                  ctx->c2p_train_data_offset,
1740                                                  ctx->train_data_size,
1741                                                  &ctx->c2p_bo,
1742                                                  NULL);
1743                 if (ret) {
1744                         DRM_ERROR("alloc c2p_bo failed(%d)!\n", ret);
1745                         amdgpu_ttm_training_reserve_vram_fini(adev);
1746                         return ret;
1747                 }
1748                 ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS;
1749         }
1750
1751         if (!adev->gmc.is_app_apu) {
1752                 ret = amdgpu_bo_create_kernel_at(
1753                         adev, adev->gmc.real_vram_size - reserve_size,
1754                         reserve_size, &adev->mman.fw_reserved_memory, NULL);
1755                 if (ret) {
1756                         DRM_ERROR("alloc tmr failed(%d)!\n", ret);
1757                         amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory,
1758                                               NULL, NULL);
1759                         return ret;
1760                 }
1761         } else {
1762                 DRM_DEBUG_DRIVER("backdoor fw loading path for PSP TMR, no reservation needed\n");
1763         }
1764
1765         return 0;
1766 }
1767
1768 static int amdgpu_ttm_pools_init(struct amdgpu_device *adev)
1769 {
1770         int i;
1771
1772         if (!adev->gmc.is_app_apu || !adev->gmc.num_mem_partitions)
1773                 return 0;
1774
1775         adev->mman.ttm_pools = kcalloc(adev->gmc.num_mem_partitions,
1776                                        sizeof(*adev->mman.ttm_pools),
1777                                        GFP_KERNEL);
1778         if (!adev->mman.ttm_pools)
1779                 return -ENOMEM;
1780
1781         for (i = 0; i < adev->gmc.num_mem_partitions; i++) {
1782                 ttm_pool_init(&adev->mman.ttm_pools[i], adev->dev,
1783                               adev->gmc.mem_partitions[i].numa.node,
1784                               false, false);
1785         }
1786         return 0;
1787 }
1788
1789 static void amdgpu_ttm_pools_fini(struct amdgpu_device *adev)
1790 {
1791         int i;
1792
1793         if (!adev->gmc.is_app_apu || !adev->mman.ttm_pools)
1794                 return;
1795
1796         for (i = 0; i < adev->gmc.num_mem_partitions; i++)
1797                 ttm_pool_fini(&adev->mman.ttm_pools[i]);
1798
1799         kfree(adev->mman.ttm_pools);
1800         adev->mman.ttm_pools = NULL;
1801 }
1802
1803 /*
1804  * amdgpu_ttm_init - Init the memory management (ttm) as well as various
1805  * gtt/vram related fields.
1806  *
1807  * This initializes all of the memory space pools that the TTM layer
1808  * will need such as the GTT space (system memory mapped to the device),
1809  * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
1810  * can be mapped per VMID.
1811  */
1812 int amdgpu_ttm_init(struct amdgpu_device *adev)
1813 {
1814         uint64_t gtt_size;
1815         int r;
1816
1817         mutex_init(&adev->mman.gtt_window_lock);
1818
1819         /* No others user of address space so set it to 0 */
1820         r = ttm_device_init(&adev->mman.bdev, &amdgpu_bo_driver, adev->dev,
1821                                adev_to_drm(adev)->anon_inode->i_mapping,
1822                                adev_to_drm(adev)->vma_offset_manager,
1823                                adev->need_swiotlb,
1824                                dma_addressing_limited(adev->dev));
1825         if (r) {
1826                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1827                 return r;
1828         }
1829
1830         r = amdgpu_ttm_pools_init(adev);
1831         if (r) {
1832                 DRM_ERROR("failed to init ttm pools(%d).\n", r);
1833                 return r;
1834         }
1835         adev->mman.initialized = true;
1836
1837         /* Initialize VRAM pool with all of VRAM divided into pages */
1838         r = amdgpu_vram_mgr_init(adev);
1839         if (r) {
1840                 DRM_ERROR("Failed initializing VRAM heap.\n");
1841                 return r;
1842         }
1843
1844         /* Change the size here instead of the init above so only lpfn is affected */
1845         amdgpu_ttm_set_buffer_funcs_status(adev, false);
1846 #ifdef CONFIG_64BIT
1847 #ifdef CONFIG_X86
1848         if (adev->gmc.xgmi.connected_to_cpu)
1849                 adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base,
1850                                 adev->gmc.visible_vram_size);
1851
1852         else if (adev->gmc.is_app_apu)
1853                 DRM_DEBUG_DRIVER(
1854                         "No need to ioremap when real vram size is 0\n");
1855         else
1856 #endif
1857                 adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
1858                                 adev->gmc.visible_vram_size);
1859 #endif
1860
1861         /*
1862          *The reserved vram for firmware must be pinned to the specified
1863          *place on the VRAM, so reserve it early.
1864          */
1865         r = amdgpu_ttm_fw_reserve_vram_init(adev);
1866         if (r)
1867                 return r;
1868
1869         /*
1870          *The reserved vram for driver must be pinned to the specified
1871          *place on the VRAM, so reserve it early.
1872          */
1873         r = amdgpu_ttm_drv_reserve_vram_init(adev);
1874         if (r)
1875                 return r;
1876
1877         /*
1878          * only NAVI10 and onwards ASIC support for IP discovery.
1879          * If IP discovery enabled, a block of memory should be
1880          * reserved for IP discovey.
1881          */
1882         if (adev->mman.discovery_bin) {
1883                 r = amdgpu_ttm_reserve_tmr(adev);
1884                 if (r)
1885                         return r;
1886         }
1887
1888         /* allocate memory as required for VGA
1889          * This is used for VGA emulation and pre-OS scanout buffers to
1890          * avoid display artifacts while transitioning between pre-OS
1891          * and driver.
1892          */
1893         if (!adev->gmc.is_app_apu) {
1894                 r = amdgpu_bo_create_kernel_at(adev, 0,
1895                                                adev->mman.stolen_vga_size,
1896                                                &adev->mman.stolen_vga_memory,
1897                                                NULL);
1898                 if (r)
1899                         return r;
1900
1901                 r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_vga_size,
1902                                                adev->mman.stolen_extended_size,
1903                                                &adev->mman.stolen_extended_memory,
1904                                                NULL);
1905
1906                 if (r)
1907                         return r;
1908
1909                 r = amdgpu_bo_create_kernel_at(adev,
1910                                                adev->mman.stolen_reserved_offset,
1911                                                adev->mman.stolen_reserved_size,
1912                                                &adev->mman.stolen_reserved_memory,
1913                                                NULL);
1914                 if (r)
1915                         return r;
1916         } else {
1917                 DRM_DEBUG_DRIVER("Skipped stolen memory reservation\n");
1918         }
1919
1920         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1921                  (unsigned int)(adev->gmc.real_vram_size / (1024 * 1024)));
1922
1923         /* Compute GTT size, either based on TTM limit
1924          * or whatever the user passed on module init.
1925          */
1926         if (amdgpu_gtt_size == -1)
1927                 gtt_size = ttm_tt_pages_limit() << PAGE_SHIFT;
1928         else
1929                 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1930
1931         /* Initialize GTT memory pool */
1932         r = amdgpu_gtt_mgr_init(adev, gtt_size);
1933         if (r) {
1934                 DRM_ERROR("Failed initializing GTT heap.\n");
1935                 return r;
1936         }
1937         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1938                  (unsigned int)(gtt_size / (1024 * 1024)));
1939
1940         /* Initiailize doorbell pool on PCI BAR */
1941         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_DOORBELL, adev->doorbell.size / PAGE_SIZE);
1942         if (r) {
1943                 DRM_ERROR("Failed initializing doorbell heap.\n");
1944                 return r;
1945         }
1946
1947         /* Create a boorbell page for kernel usages */
1948         r = amdgpu_doorbell_create_kernel_doorbells(adev);
1949         if (r) {
1950                 DRM_ERROR("Failed to initialize kernel doorbells.\n");
1951                 return r;
1952         }
1953
1954         /* Initialize preemptible memory pool */
1955         r = amdgpu_preempt_mgr_init(adev);
1956         if (r) {
1957                 DRM_ERROR("Failed initializing PREEMPT heap.\n");
1958                 return r;
1959         }
1960
1961         /* Initialize various on-chip memory pools */
1962         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size);
1963         if (r) {
1964                 DRM_ERROR("Failed initializing GDS heap.\n");
1965                 return r;
1966         }
1967
1968         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GWS, adev->gds.gws_size);
1969         if (r) {
1970                 DRM_ERROR("Failed initializing gws heap.\n");
1971                 return r;
1972         }
1973
1974         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_OA, adev->gds.oa_size);
1975         if (r) {
1976                 DRM_ERROR("Failed initializing oa heap.\n");
1977                 return r;
1978         }
1979         if (amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
1980                                 AMDGPU_GEM_DOMAIN_GTT,
1981                                 &adev->mman.sdma_access_bo, NULL,
1982                                 &adev->mman.sdma_access_ptr))
1983                 DRM_WARN("Debug VRAM access will use slowpath MM access\n");
1984
1985         return 0;
1986 }
1987
1988 /*
1989  * amdgpu_ttm_fini - De-initialize the TTM memory pools
1990  */
1991 void amdgpu_ttm_fini(struct amdgpu_device *adev)
1992 {
1993         int idx;
1994
1995         if (!adev->mman.initialized)
1996                 return;
1997
1998         amdgpu_ttm_pools_fini(adev);
1999
2000         amdgpu_ttm_training_reserve_vram_fini(adev);
2001         /* return the stolen vga memory back to VRAM */
2002         if (!adev->gmc.is_app_apu) {
2003                 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL);
2004                 amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL);
2005                 /* return the FW reserved memory back to VRAM */
2006                 amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory, NULL,
2007                                       NULL);
2008                 if (adev->mman.stolen_reserved_size)
2009                         amdgpu_bo_free_kernel(&adev->mman.stolen_reserved_memory,
2010                                               NULL, NULL);
2011         }
2012         amdgpu_bo_free_kernel(&adev->mman.sdma_access_bo, NULL,
2013                                         &adev->mman.sdma_access_ptr);
2014         amdgpu_ttm_fw_reserve_vram_fini(adev);
2015         amdgpu_ttm_drv_reserve_vram_fini(adev);
2016
2017         if (drm_dev_enter(adev_to_drm(adev), &idx)) {
2018
2019                 if (adev->mman.aper_base_kaddr)
2020                         iounmap(adev->mman.aper_base_kaddr);
2021                 adev->mman.aper_base_kaddr = NULL;
2022
2023                 drm_dev_exit(idx);
2024         }
2025
2026         amdgpu_vram_mgr_fini(adev);
2027         amdgpu_gtt_mgr_fini(adev);
2028         amdgpu_preempt_mgr_fini(adev);
2029         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS);
2030         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
2031         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
2032         ttm_device_fini(&adev->mman.bdev);
2033         adev->mman.initialized = false;
2034         DRM_INFO("amdgpu: ttm finalized\n");
2035 }
2036
2037 /**
2038  * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
2039  *
2040  * @adev: amdgpu_device pointer
2041  * @enable: true when we can use buffer functions.
2042  *
2043  * Enable/disable use of buffer functions during suspend/resume. This should
2044  * only be called at bootup or when userspace isn't running.
2045  */
2046 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
2047 {
2048         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
2049         uint64_t size;
2050         int r;
2051
2052         if (!adev->mman.initialized || amdgpu_in_reset(adev) ||
2053             adev->mman.buffer_funcs_enabled == enable || adev->gmc.is_app_apu)
2054                 return;
2055
2056         if (enable) {
2057                 struct amdgpu_ring *ring;
2058                 struct drm_gpu_scheduler *sched;
2059
2060                 ring = adev->mman.buffer_funcs_ring;
2061                 sched = &ring->sched;
2062                 r = drm_sched_entity_init(&adev->mman.high_pr,
2063                                           DRM_SCHED_PRIORITY_KERNEL, &sched,
2064                                           1, NULL);
2065                 if (r) {
2066                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
2067                                   r);
2068                         return;
2069                 }
2070
2071                 r = drm_sched_entity_init(&adev->mman.low_pr,
2072                                           DRM_SCHED_PRIORITY_NORMAL, &sched,
2073                                           1, NULL);
2074                 if (r) {
2075                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
2076                                   r);
2077                         goto error_free_entity;
2078                 }
2079         } else {
2080                 drm_sched_entity_destroy(&adev->mman.high_pr);
2081                 drm_sched_entity_destroy(&adev->mman.low_pr);
2082                 dma_fence_put(man->move);
2083                 man->move = NULL;
2084         }
2085
2086         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
2087         if (enable)
2088                 size = adev->gmc.real_vram_size;
2089         else
2090                 size = adev->gmc.visible_vram_size;
2091         man->size = size;
2092         adev->mman.buffer_funcs_enabled = enable;
2093
2094         return;
2095
2096 error_free_entity:
2097         drm_sched_entity_destroy(&adev->mman.high_pr);
2098 }
2099
2100 static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
2101                                   bool direct_submit,
2102                                   unsigned int num_dw,
2103                                   struct dma_resv *resv,
2104                                   bool vm_needs_flush,
2105                                   struct amdgpu_job **job,
2106                                   bool delayed)
2107 {
2108         enum amdgpu_ib_pool_type pool = direct_submit ?
2109                 AMDGPU_IB_POOL_DIRECT :
2110                 AMDGPU_IB_POOL_DELAYED;
2111         int r;
2112         struct drm_sched_entity *entity = delayed ? &adev->mman.low_pr :
2113                                                     &adev->mman.high_pr;
2114         r = amdgpu_job_alloc_with_ib(adev, entity,
2115                                      AMDGPU_FENCE_OWNER_UNDEFINED,
2116                                      num_dw * 4, pool, job);
2117         if (r)
2118                 return r;
2119
2120         if (vm_needs_flush) {
2121                 (*job)->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gmc.pdb0_bo ?
2122                                                         adev->gmc.pdb0_bo :
2123                                                         adev->gart.bo);
2124                 (*job)->vm_needs_flush = true;
2125         }
2126         if (!resv)
2127                 return 0;
2128
2129         return drm_sched_job_add_resv_dependencies(&(*job)->base, resv,
2130                                                    DMA_RESV_USAGE_BOOKKEEP);
2131 }
2132
2133 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
2134                        uint64_t dst_offset, uint32_t byte_count,
2135                        struct dma_resv *resv,
2136                        struct dma_fence **fence, bool direct_submit,
2137                        bool vm_needs_flush, bool tmz)
2138 {
2139         struct amdgpu_device *adev = ring->adev;
2140         unsigned int num_loops, num_dw;
2141         struct amdgpu_job *job;
2142         uint32_t max_bytes;
2143         unsigned int i;
2144         int r;
2145
2146         if (!direct_submit && !ring->sched.ready) {
2147                 DRM_ERROR("Trying to move memory with ring turned off.\n");
2148                 return -EINVAL;
2149         }
2150
2151         max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
2152         num_loops = DIV_ROUND_UP(byte_count, max_bytes);
2153         num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
2154         r = amdgpu_ttm_prepare_job(adev, direct_submit, num_dw,
2155                                    resv, vm_needs_flush, &job, false);
2156         if (r)
2157                 return r;
2158
2159         for (i = 0; i < num_loops; i++) {
2160                 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
2161
2162                 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
2163                                         dst_offset, cur_size_in_bytes, tmz);
2164
2165                 src_offset += cur_size_in_bytes;
2166                 dst_offset += cur_size_in_bytes;
2167                 byte_count -= cur_size_in_bytes;
2168         }
2169
2170         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2171         WARN_ON(job->ibs[0].length_dw > num_dw);
2172         if (direct_submit)
2173                 r = amdgpu_job_submit_direct(job, ring, fence);
2174         else
2175                 *fence = amdgpu_job_submit(job);
2176         if (r)
2177                 goto error_free;
2178
2179         return r;
2180
2181 error_free:
2182         amdgpu_job_free(job);
2183         DRM_ERROR("Error scheduling IBs (%d)\n", r);
2184         return r;
2185 }
2186
2187 static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
2188                                uint64_t dst_addr, uint32_t byte_count,
2189                                struct dma_resv *resv,
2190                                struct dma_fence **fence,
2191                                bool vm_needs_flush, bool delayed)
2192 {
2193         struct amdgpu_device *adev = ring->adev;
2194         unsigned int num_loops, num_dw;
2195         struct amdgpu_job *job;
2196         uint32_t max_bytes;
2197         unsigned int i;
2198         int r;
2199
2200         max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
2201         num_loops = DIV_ROUND_UP_ULL(byte_count, max_bytes);
2202         num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->fill_num_dw, 8);
2203         r = amdgpu_ttm_prepare_job(adev, false, num_dw, resv, vm_needs_flush,
2204                                    &job, delayed);
2205         if (r)
2206                 return r;
2207
2208         for (i = 0; i < num_loops; i++) {
2209                 uint32_t cur_size = min(byte_count, max_bytes);
2210
2211                 amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data, dst_addr,
2212                                         cur_size);
2213
2214                 dst_addr += cur_size;
2215                 byte_count -= cur_size;
2216         }
2217
2218         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2219         WARN_ON(job->ibs[0].length_dw > num_dw);
2220         *fence = amdgpu_job_submit(job);
2221         return 0;
2222 }
2223
2224 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
2225                         uint32_t src_data,
2226                         struct dma_resv *resv,
2227                         struct dma_fence **f,
2228                         bool delayed)
2229 {
2230         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
2231         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
2232         struct dma_fence *fence = NULL;
2233         struct amdgpu_res_cursor dst;
2234         int r;
2235
2236         if (!adev->mman.buffer_funcs_enabled) {
2237                 DRM_ERROR("Trying to clear memory with ring turned off.\n");
2238                 return -EINVAL;
2239         }
2240
2241         amdgpu_res_first(bo->tbo.resource, 0, amdgpu_bo_size(bo), &dst);
2242
2243         mutex_lock(&adev->mman.gtt_window_lock);
2244         while (dst.remaining) {
2245                 struct dma_fence *next;
2246                 uint64_t cur_size, to;
2247
2248                 /* Never fill more than 256MiB at once to avoid timeouts */
2249                 cur_size = min(dst.size, 256ULL << 20);
2250
2251                 r = amdgpu_ttm_map_buffer(&bo->tbo, bo->tbo.resource, &dst,
2252                                           1, ring, false, &cur_size, &to);
2253                 if (r)
2254                         goto error;
2255
2256                 r = amdgpu_ttm_fill_mem(ring, src_data, to, cur_size, resv,
2257                                         &next, true, delayed);
2258                 if (r)
2259                         goto error;
2260
2261                 dma_fence_put(fence);
2262                 fence = next;
2263
2264                 amdgpu_res_next(&dst, cur_size);
2265         }
2266 error:
2267         mutex_unlock(&adev->mman.gtt_window_lock);
2268         if (f)
2269                 *f = dma_fence_get(fence);
2270         dma_fence_put(fence);
2271         return r;
2272 }
2273
2274 /**
2275  * amdgpu_ttm_evict_resources - evict memory buffers
2276  * @adev: amdgpu device object
2277  * @mem_type: evicted BO's memory type
2278  *
2279  * Evicts all @mem_type buffers on the lru list of the memory type.
2280  *
2281  * Returns:
2282  * 0 for success or a negative error code on failure.
2283  */
2284 int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type)
2285 {
2286         struct ttm_resource_manager *man;
2287
2288         switch (mem_type) {
2289         case TTM_PL_VRAM:
2290         case TTM_PL_TT:
2291         case AMDGPU_PL_GWS:
2292         case AMDGPU_PL_GDS:
2293         case AMDGPU_PL_OA:
2294                 man = ttm_manager_type(&adev->mman.bdev, mem_type);
2295                 break;
2296         default:
2297                 DRM_ERROR("Trying to evict invalid memory type\n");
2298                 return -EINVAL;
2299         }
2300
2301         return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
2302 }
2303
2304 #if defined(CONFIG_DEBUG_FS)
2305
2306 static int amdgpu_ttm_page_pool_show(struct seq_file *m, void *unused)
2307 {
2308         struct amdgpu_device *adev = m->private;
2309
2310         return ttm_pool_debugfs(&adev->mman.bdev.pool, m);
2311 }
2312
2313 DEFINE_SHOW_ATTRIBUTE(amdgpu_ttm_page_pool);
2314
2315 /*
2316  * amdgpu_ttm_vram_read - Linear read access to VRAM
2317  *
2318  * Accesses VRAM via MMIO for debugging purposes.
2319  */
2320 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
2321                                     size_t size, loff_t *pos)
2322 {
2323         struct amdgpu_device *adev = file_inode(f)->i_private;
2324         ssize_t result = 0;
2325
2326         if (size & 0x3 || *pos & 0x3)
2327                 return -EINVAL;
2328
2329         if (*pos >= adev->gmc.mc_vram_size)
2330                 return -ENXIO;
2331
2332         size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos));
2333         while (size) {
2334                 size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4);
2335                 uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ];
2336
2337                 amdgpu_device_vram_access(adev, *pos, value, bytes, false);
2338                 if (copy_to_user(buf, value, bytes))
2339                         return -EFAULT;
2340
2341                 result += bytes;
2342                 buf += bytes;
2343                 *pos += bytes;
2344                 size -= bytes;
2345         }
2346
2347         return result;
2348 }
2349
2350 /*
2351  * amdgpu_ttm_vram_write - Linear write access to VRAM
2352  *
2353  * Accesses VRAM via MMIO for debugging purposes.
2354  */
2355 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
2356                                     size_t size, loff_t *pos)
2357 {
2358         struct amdgpu_device *adev = file_inode(f)->i_private;
2359         ssize_t result = 0;
2360         int r;
2361
2362         if (size & 0x3 || *pos & 0x3)
2363                 return -EINVAL;
2364
2365         if (*pos >= adev->gmc.mc_vram_size)
2366                 return -ENXIO;
2367
2368         while (size) {
2369                 uint32_t value;
2370
2371                 if (*pos >= adev->gmc.mc_vram_size)
2372                         return result;
2373
2374                 r = get_user(value, (uint32_t *)buf);
2375                 if (r)
2376                         return r;
2377
2378                 amdgpu_device_mm_access(adev, *pos, &value, 4, true);
2379
2380                 result += 4;
2381                 buf += 4;
2382                 *pos += 4;
2383                 size -= 4;
2384         }
2385
2386         return result;
2387 }
2388
2389 static const struct file_operations amdgpu_ttm_vram_fops = {
2390         .owner = THIS_MODULE,
2391         .read = amdgpu_ttm_vram_read,
2392         .write = amdgpu_ttm_vram_write,
2393         .llseek = default_llseek,
2394 };
2395
2396 /*
2397  * amdgpu_iomem_read - Virtual read access to GPU mapped memory
2398  *
2399  * This function is used to read memory that has been mapped to the
2400  * GPU and the known addresses are not physical addresses but instead
2401  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2402  */
2403 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
2404                                  size_t size, loff_t *pos)
2405 {
2406         struct amdgpu_device *adev = file_inode(f)->i_private;
2407         struct iommu_domain *dom;
2408         ssize_t result = 0;
2409         int r;
2410
2411         /* retrieve the IOMMU domain if any for this device */
2412         dom = iommu_get_domain_for_dev(adev->dev);
2413
2414         while (size) {
2415                 phys_addr_t addr = *pos & PAGE_MASK;
2416                 loff_t off = *pos & ~PAGE_MASK;
2417                 size_t bytes = PAGE_SIZE - off;
2418                 unsigned long pfn;
2419                 struct page *p;
2420                 void *ptr;
2421
2422                 bytes = min(bytes, size);
2423
2424                 /* Translate the bus address to a physical address.  If
2425                  * the domain is NULL it means there is no IOMMU active
2426                  * and the address translation is the identity
2427                  */
2428                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2429
2430                 pfn = addr >> PAGE_SHIFT;
2431                 if (!pfn_valid(pfn))
2432                         return -EPERM;
2433
2434                 p = pfn_to_page(pfn);
2435                 if (p->mapping != adev->mman.bdev.dev_mapping)
2436                         return -EPERM;
2437
2438                 ptr = kmap_local_page(p);
2439                 r = copy_to_user(buf, ptr + off, bytes);
2440                 kunmap_local(ptr);
2441                 if (r)
2442                         return -EFAULT;
2443
2444                 size -= bytes;
2445                 *pos += bytes;
2446                 result += bytes;
2447         }
2448
2449         return result;
2450 }
2451
2452 /*
2453  * amdgpu_iomem_write - Virtual write access to GPU mapped memory
2454  *
2455  * This function is used to write memory that has been mapped to the
2456  * GPU and the known addresses are not physical addresses but instead
2457  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2458  */
2459 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
2460                                  size_t size, loff_t *pos)
2461 {
2462         struct amdgpu_device *adev = file_inode(f)->i_private;
2463         struct iommu_domain *dom;
2464         ssize_t result = 0;
2465         int r;
2466
2467         dom = iommu_get_domain_for_dev(adev->dev);
2468
2469         while (size) {
2470                 phys_addr_t addr = *pos & PAGE_MASK;
2471                 loff_t off = *pos & ~PAGE_MASK;
2472                 size_t bytes = PAGE_SIZE - off;
2473                 unsigned long pfn;
2474                 struct page *p;
2475                 void *ptr;
2476
2477                 bytes = min(bytes, size);
2478
2479                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2480
2481                 pfn = addr >> PAGE_SHIFT;
2482                 if (!pfn_valid(pfn))
2483                         return -EPERM;
2484
2485                 p = pfn_to_page(pfn);
2486                 if (p->mapping != adev->mman.bdev.dev_mapping)
2487                         return -EPERM;
2488
2489                 ptr = kmap_local_page(p);
2490                 r = copy_from_user(ptr + off, buf, bytes);
2491                 kunmap_local(ptr);
2492                 if (r)
2493                         return -EFAULT;
2494
2495                 size -= bytes;
2496                 *pos += bytes;
2497                 result += bytes;
2498         }
2499
2500         return result;
2501 }
2502
2503 static const struct file_operations amdgpu_ttm_iomem_fops = {
2504         .owner = THIS_MODULE,
2505         .read = amdgpu_iomem_read,
2506         .write = amdgpu_iomem_write,
2507         .llseek = default_llseek
2508 };
2509
2510 #endif
2511
2512 void amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
2513 {
2514 #if defined(CONFIG_DEBUG_FS)
2515         struct drm_minor *minor = adev_to_drm(adev)->primary;
2516         struct dentry *root = minor->debugfs_root;
2517
2518         debugfs_create_file_size("amdgpu_vram", 0444, root, adev,
2519                                  &amdgpu_ttm_vram_fops, adev->gmc.mc_vram_size);
2520         debugfs_create_file("amdgpu_iomem", 0444, root, adev,
2521                             &amdgpu_ttm_iomem_fops);
2522         debugfs_create_file("ttm_page_pool", 0444, root, adev,
2523                             &amdgpu_ttm_page_pool_fops);
2524         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2525                                                              TTM_PL_VRAM),
2526                                             root, "amdgpu_vram_mm");
2527         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2528                                                              TTM_PL_TT),
2529                                             root, "amdgpu_gtt_mm");
2530         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2531                                                              AMDGPU_PL_GDS),
2532                                             root, "amdgpu_gds_mm");
2533         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2534                                                              AMDGPU_PL_GWS),
2535                                             root, "amdgpu_gws_mm");
2536         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2537                                                              AMDGPU_PL_OA),
2538                                             root, "amdgpu_oa_mm");
2539
2540 #endif
2541 }