drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

   1 /*
   2  * Copyright 2009 Jerome Glisse.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Jerome Glisse <[email protected]>
  29  *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
  30  *    Dave Airlie
  31  */
  32
  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                 return;
 106         }
 107
 108         /* Object isn't an AMDGPU object so ignore */
 109         if (!amdgpu_bo_is_amdgpu_bo(bo)) {
 110                 placement->placement = &placements;
 111                 placement->num_placement = 1;
 112                 return;
 113         }
 114
 115         abo = ttm_to_amdgpu_bo(bo);
 116         if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
 117                 placement->num_placement = 0;
 118                 return;
 119         }
 120
 121         switch (bo->resource->mem_type) {
 122         case AMDGPU_PL_GDS:
 123         case AMDGPU_PL_GWS:
 124         case AMDGPU_PL_OA:
 125         case AMDGPU_PL_DOORBELL:
 126                 placement->num_placement = 0;
 127                 return;
 128
 129         case TTM_PL_VRAM:
 130                 if (!adev->mman.buffer_funcs_enabled) {
 131                         /* Move to system memory */
 132                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 133
 134                 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 135                            !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 136                            amdgpu_res_cpu_visible(adev, bo->resource)) {
 137
 138                         /* Try evicting to the CPU inaccessible part of VRAM
 139                          * first, but only set GTT as busy placement, so this
 140                          * BO will be evicted to GTT rather than causing other
 141                          * BOs to be evicted from VRAM
 142                          */
 143                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
 144                                                         AMDGPU_GEM_DOMAIN_GTT |
 145                                                         AMDGPU_GEM_DOMAIN_CPU);
 146                         abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 147                         abo->placements[0].lpfn = 0;
 148                         abo->placements[0].flags |= TTM_PL_FLAG_DESIRED;
 149                 } else {
 150                         /* Move to GTT memory */
 151                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
 152                                                         AMDGPU_GEM_DOMAIN_CPU);
 153                 }
 154                 break;
 155         case TTM_PL_TT:
 156         case AMDGPU_PL_PREEMPT:
 157         default:
 158                 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 159                 break;
 160         }
 161         *placement = abo->placement;
 162 }
 163
 164 /**
 165  * amdgpu_ttm_map_buffer - Map memory into the GART windows
 166  * @bo: buffer object to map
 167  * @mem: memory object to map
 168  * @mm_cur: range to map
 169  * @window: which GART window to use
 170  * @ring: DMA ring to use for the copy
 171  * @tmz: if we should setup a TMZ enabled mapping
 172  * @size: in number of bytes to map, out number of bytes mapped
 173  * @addr: resulting address inside the MC address space
 174  *
 175  * Setup one of the GART windows to access a specific piece of memory or return
 176  * the physical address for local memory.
 177  */
 178 static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 179                                  struct ttm_resource *mem,
 180                                  struct amdgpu_res_cursor *mm_cur,
 181                                  unsigned int window, struct amdgpu_ring *ring,
 182                                  bool tmz, uint64_t *size, uint64_t *addr)
 183 {
 184         struct amdgpu_device *adev = ring->adev;
 185         unsigned int offset, num_pages, num_dw, num_bytes;
 186         uint64_t src_addr, dst_addr;
 187         struct amdgpu_job *job;
 188         void *cpu_addr;
 189         uint64_t flags;
 190         unsigned int i;
 191         int r;
 192
 193         BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
 194                AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
 195
 196         if (WARN_ON(mem->mem_type == AMDGPU_PL_PREEMPT))
 197                 return -EINVAL;
 198
 199         /* Map only what can't be accessed directly */
 200         if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) {
 201                 *addr = amdgpu_ttm_domain_start(adev, mem->mem_type) +
 202                         mm_cur->start;
 203                 return 0;
 204         }
 205
 206
 207         /*
 208          * If start begins at an offset inside the page, then adjust the size
 209          * and addr accordingly
 210          */
 211         offset = mm_cur->start & ~PAGE_MASK;
 212
 213         num_pages = PFN_UP(*size + offset);
 214         num_pages = min_t(uint32_t, num_pages, AMDGPU_GTT_MAX_TRANSFER_SIZE);
 215
 216         *size = min(*size, (uint64_t)num_pages * PAGE_SIZE - offset);
 217
 218         *addr = adev->gmc.gart_start;
 219         *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
 220                 AMDGPU_GPU_PAGE_SIZE;
 221         *addr += offset;
 222
 223         num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
 224         num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
 225
 226         r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr,
 227                                      AMDGPU_FENCE_OWNER_UNDEFINED,
 228                                      num_dw * 4 + num_bytes,
 229                                      AMDGPU_IB_POOL_DELAYED, &job);
 230         if (r)
 231                 return r;
 232
 233         src_addr = num_dw * 4;
 234         src_addr += job->ibs[0].gpu_addr;
 235
 236         dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
 237         dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
 238         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
 239                                 dst_addr, num_bytes, 0);
 240
 241         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
 242         WARN_ON(job->ibs[0].length_dw > num_dw);
 243
 244         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
 245         if (tmz)
 246                 flags |= AMDGPU_PTE_TMZ;
 247
 248         cpu_addr = &job->ibs[0].ptr[num_dw];
 249
 250         if (mem->mem_type == TTM_PL_TT) {
 251                 dma_addr_t *dma_addr;
 252
 253                 dma_addr = &bo->ttm->dma_address[mm_cur->start >> PAGE_SHIFT];
 254                 amdgpu_gart_map(adev, 0, num_pages, dma_addr, flags, cpu_addr);
 255         } else {
 256                 dma_addr_t dma_address;
 257
 258                 dma_address = mm_cur->start;
 259                 dma_address += adev->vm_manager.vram_base_offset;
 260
 261                 for (i = 0; i < num_pages; ++i) {
 262                         amdgpu_gart_map(adev, i << PAGE_SHIFT, 1, &dma_address,
 263                                         flags, cpu_addr);
 264                         dma_address += PAGE_SIZE;
 265                 }
 266         }
 267
 268         dma_fence_put(amdgpu_job_submit(job));
 269         return 0;
 270 }
 271
 272 /**
 273  * amdgpu_ttm_copy_mem_to_mem - Helper function for copy
 274  * @adev: amdgpu device
 275  * @src: buffer/address where to read from
 276  * @dst: buffer/address where to write to
 277  * @size: number of bytes to copy
 278  * @tmz: if a secure copy should be used
 279  * @resv: resv object to sync to
 280  * @f: Returns the last fence if multiple jobs are submitted.
 281  *
 282  * The function copies @size bytes from {src->mem + src->offset} to
 283  * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
 284  * move and different for a BO to BO copy.
 285  *
 286  */
 287 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 288                                const struct amdgpu_copy_mem *src,
 289                                const struct amdgpu_copy_mem *dst,
 290                                uint64_t size, bool tmz,
 291                                struct dma_resv *resv,
 292                                struct dma_fence **f)
 293 {
 294         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
 295         struct amdgpu_res_cursor src_mm, dst_mm;
 296         struct dma_fence *fence = NULL;
 297         int r = 0;
 298
 299         uint32_t copy_flags = 0;
 300
 301         if (!adev->mman.buffer_funcs_enabled) {
 302                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 303                 return -EINVAL;
 304         }
 305
 306         amdgpu_res_first(src->mem, src->offset, size, &src_mm);
 307         amdgpu_res_first(dst->mem, dst->offset, size, &dst_mm);
 308
 309         mutex_lock(&adev->mman.gtt_window_lock);
 310         while (src_mm.remaining) {
 311                 uint64_t from, to, cur_size;
 312                 struct dma_fence *next;
 313
 314                 /* Never copy more than 256MiB at once to avoid a timeout */
 315                 cur_size = min3(src_mm.size, dst_mm.size, 256ULL << 20);
 316
 317                 /* Map src to window 0 and dst to window 1. */
 318                 r = amdgpu_ttm_map_buffer(src->bo, src->mem, &src_mm,
 319                                           0, ring, tmz, &cur_size, &from);
 320                 if (r)
 321                         goto error;
 322
 323                 r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, &dst_mm,
 324                                           1, ring, tmz, &cur_size, &to);
 325                 if (r)
 326                         goto error;
 327
 328                 if (tmz)
 329                         copy_flags |= AMDGPU_COPY_FLAGS_TMZ;
 330
 331                 r = amdgpu_copy_buffer(ring, from, to, cur_size, resv,
 332                                        &next, false, true, copy_flags);
 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, 0, NULL, &wipe_fence,
 387                                        false);
 388                 if (r) {
 389                         goto error;
 390                 } else if (wipe_fence) {
 391                         amdgpu_vram_mgr_set_cleared(bo->resource);
 392                         dma_fence_put(fence);
 393                         fence = wipe_fence;
 394                 }
 395         }
 396
 397         /* Always block for VM page tables before committing the new location */
 398         if (bo->type == ttm_bo_type_kernel)
 399                 r = ttm_bo_move_accel_cleanup(bo, fence, true, false, new_mem);
 400         else
 401                 r = ttm_bo_move_accel_cleanup(bo, fence, evict, true, new_mem);
 402         dma_fence_put(fence);
 403         return r;
 404
 405 error:
 406         if (fence)
 407                 dma_fence_wait(fence, false);
 408         dma_fence_put(fence);
 409         return r;
 410 }
 411
 412 /**
 413  * amdgpu_res_cpu_visible - Check that resource can be accessed by CPU
 414  * @adev: amdgpu device
 415  * @res: the resource to check
 416  *
 417  * Returns: true if the full resource is CPU visible, false otherwise.
 418  */
 419 bool amdgpu_res_cpu_visible(struct amdgpu_device *adev,
 420                             struct ttm_resource *res)
 421 {
 422         struct amdgpu_res_cursor cursor;
 423
 424         if (!res)
 425                 return false;
 426
 427         if (res->mem_type == TTM_PL_SYSTEM || res->mem_type == TTM_PL_TT ||
 428             res->mem_type == AMDGPU_PL_PREEMPT || res->mem_type == AMDGPU_PL_DOORBELL)
 429                 return true;
 430
 431         if (res->mem_type != TTM_PL_VRAM)
 432                 return false;
 433
 434         amdgpu_res_first(res, 0, res->size, &cursor);
 435         while (cursor.remaining) {
 436                 if ((cursor.start + cursor.size) > adev->gmc.visible_vram_size)
 437                         return false;
 438                 amdgpu_res_next(&cursor, cursor.size);
 439         }
 440
 441         return true;
 442 }
 443
 444 /*
 445  * amdgpu_res_copyable - Check that memory can be accessed by ttm_bo_move_memcpy
 446  *
 447  * Called by amdgpu_bo_move()
 448  */
 449 static bool amdgpu_res_copyable(struct amdgpu_device *adev,
 450                                 struct ttm_resource *mem)
 451 {
 452         if (!amdgpu_res_cpu_visible(adev, mem))
 453                 return false;
 454
 455         /* ttm_resource_ioremap only supports contiguous memory */
 456         if (mem->mem_type == TTM_PL_VRAM &&
 457             !(mem->placement & TTM_PL_FLAG_CONTIGUOUS))
 458                 return false;
 459
 460         return true;
 461 }
 462
 463 /*
 464  * amdgpu_bo_move - Move a buffer object to a new memory location
 465  *
 466  * Called by ttm_bo_handle_move_mem()
 467  */
 468 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
 469                           struct ttm_operation_ctx *ctx,
 470                           struct ttm_resource *new_mem,
 471                           struct ttm_place *hop)
 472 {
 473         struct amdgpu_device *adev;
 474         struct amdgpu_bo *abo;
 475         struct ttm_resource *old_mem = bo->resource;
 476         int r;
 477
 478         if (new_mem->mem_type == TTM_PL_TT ||
 479             new_mem->mem_type == AMDGPU_PL_PREEMPT) {
 480                 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem);
 481                 if (r)
 482                         return r;
 483         }
 484
 485         abo = ttm_to_amdgpu_bo(bo);
 486         adev = amdgpu_ttm_adev(bo->bdev);
 487
 488         if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
 489                          bo->ttm == NULL)) {
 490                 amdgpu_bo_move_notify(bo, evict, new_mem);
 491                 ttm_bo_move_null(bo, new_mem);
 492                 return 0;
 493         }
 494         if (old_mem->mem_type == TTM_PL_SYSTEM &&
 495             (new_mem->mem_type == TTM_PL_TT ||
 496              new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
 497                 amdgpu_bo_move_notify(bo, evict, new_mem);
 498                 ttm_bo_move_null(bo, new_mem);
 499                 return 0;
 500         }
 501         if ((old_mem->mem_type == TTM_PL_TT ||
 502              old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
 503             new_mem->mem_type == TTM_PL_SYSTEM) {
 504                 r = ttm_bo_wait_ctx(bo, ctx);
 505                 if (r)
 506                         return r;
 507
 508                 amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm);
 509                 amdgpu_bo_move_notify(bo, evict, new_mem);
 510                 ttm_resource_free(bo, &bo->resource);
 511                 ttm_bo_assign_mem(bo, new_mem);
 512                 return 0;
 513         }
 514
 515         if (old_mem->mem_type == AMDGPU_PL_GDS ||
 516             old_mem->mem_type == AMDGPU_PL_GWS ||
 517             old_mem->mem_type == AMDGPU_PL_OA ||
 518             old_mem->mem_type == AMDGPU_PL_DOORBELL ||
 519             new_mem->mem_type == AMDGPU_PL_GDS ||
 520             new_mem->mem_type == AMDGPU_PL_GWS ||
 521             new_mem->mem_type == AMDGPU_PL_OA ||
 522             new_mem->mem_type == AMDGPU_PL_DOORBELL) {
 523                 /* Nothing to save here */
 524                 amdgpu_bo_move_notify(bo, evict, new_mem);
 525                 ttm_bo_move_null(bo, new_mem);
 526                 return 0;
 527         }
 528
 529         if (bo->type == ttm_bo_type_device &&
 530             new_mem->mem_type == TTM_PL_VRAM &&
 531             old_mem->mem_type != TTM_PL_VRAM) {
 532                 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
 533                  * accesses the BO after it's moved.
 534                  */
 535                 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 536         }
 537
 538         if (adev->mman.buffer_funcs_enabled &&
 539             ((old_mem->mem_type == TTM_PL_SYSTEM &&
 540               new_mem->mem_type == TTM_PL_VRAM) ||
 541              (old_mem->mem_type == TTM_PL_VRAM &&
 542               new_mem->mem_type == TTM_PL_SYSTEM))) {
 543                 hop->fpfn = 0;
 544                 hop->lpfn = 0;
 545                 hop->mem_type = TTM_PL_TT;
 546                 hop->flags = TTM_PL_FLAG_TEMPORARY;
 547                 return -EMULTIHOP;
 548         }
 549
 550         amdgpu_bo_move_notify(bo, evict, new_mem);
 551         if (adev->mman.buffer_funcs_enabled)
 552                 r = amdgpu_move_blit(bo, evict, new_mem, old_mem);
 553         else
 554                 r = -ENODEV;
 555
 556         if (r) {
 557                 /* Check that all memory is CPU accessible */
 558                 if (!amdgpu_res_copyable(adev, old_mem) ||
 559                     !amdgpu_res_copyable(adev, new_mem)) {
 560                         pr_err("Move buffer fallback to memcpy unavailable\n");
 561                         return r;
 562                 }
 563
 564                 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
 565                 if (r)
 566                         return r;
 567         }
 568
 569         /* update statistics after the move */
 570         if (evict)
 571                 atomic64_inc(&adev->num_evictions);
 572         atomic64_add(bo->base.size, &adev->num_bytes_moved);
 573         return 0;
 574 }
 575
 576 /*
 577  * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
 578  *
 579  * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
 580  */
 581 static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
 582                                      struct ttm_resource *mem)
 583 {
 584         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 585
 586         switch (mem->mem_type) {
 587         case TTM_PL_SYSTEM:
 588                 /* system memory */
 589                 return 0;
 590         case TTM_PL_TT:
 591         case AMDGPU_PL_PREEMPT:
 592                 break;
 593         case TTM_PL_VRAM:
 594                 mem->bus.offset = mem->start << PAGE_SHIFT;
 595
 596                 if (adev->mman.aper_base_kaddr &&
 597                     mem->placement & TTM_PL_FLAG_CONTIGUOUS)
 598                         mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
 599                                         mem->bus.offset;
 600
 601                 mem->bus.offset += adev->gmc.aper_base;
 602                 mem->bus.is_iomem = true;
 603                 break;
 604         case AMDGPU_PL_DOORBELL:
 605                 mem->bus.offset = mem->start << PAGE_SHIFT;
 606                 mem->bus.offset += adev->doorbell.base;
 607                 mem->bus.is_iomem = true;
 608                 mem->bus.caching = ttm_uncached;
 609                 break;
 610         default:
 611                 return -EINVAL;
 612         }
 613         return 0;
 614 }
 615
 616 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
 617                                            unsigned long page_offset)
 618 {
 619         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 620         struct amdgpu_res_cursor cursor;
 621
 622         amdgpu_res_first(bo->resource, (u64)page_offset << PAGE_SHIFT, 0,
 623                          &cursor);
 624
 625         if (bo->resource->mem_type == AMDGPU_PL_DOORBELL)
 626                 return ((uint64_t)(adev->doorbell.base + cursor.start)) >> PAGE_SHIFT;
 627
 628         return (adev->gmc.aper_base + cursor.start) >> PAGE_SHIFT;
 629 }
 630
 631 /**
 632  * amdgpu_ttm_domain_start - Returns GPU start address
 633  * @adev: amdgpu device object
 634  * @type: type of the memory
 635  *
 636  * Returns:
 637  * GPU start address of a memory domain
 638  */
 639
 640 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type)
 641 {
 642         switch (type) {
 643         case TTM_PL_TT:
 644                 return adev->gmc.gart_start;
 645         case TTM_PL_VRAM:
 646                 return adev->gmc.vram_start;
 647         }
 648
 649         return 0;
 650 }
 651
 652 /*
 653  * TTM backend functions.
 654  */
 655 struct amdgpu_ttm_tt {
 656         struct ttm_tt   ttm;
 657         struct drm_gem_object   *gobj;
 658         u64                     offset;
 659         uint64_t                userptr;
 660         struct task_struct      *usertask;
 661         uint32_t                userflags;
 662         bool                    bound;
 663         int32_t                 pool_id;
 664 };
 665
 666 #define ttm_to_amdgpu_ttm_tt(ptr)       container_of(ptr, struct amdgpu_ttm_tt, ttm)
 667
 668 #ifdef CONFIG_DRM_AMDGPU_USERPTR
 669 /*
 670  * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user
 671  * memory and start HMM tracking CPU page table update
 672  *
 673  * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only
 674  * once afterwards to stop HMM tracking
 675  */
 676 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages,
 677                                  struct hmm_range **range)
 678 {
 679         struct ttm_tt *ttm = bo->tbo.ttm;
 680         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 681         unsigned long start = gtt->userptr;
 682         struct vm_area_struct *vma;
 683         struct mm_struct *mm;
 684         bool readonly;
 685         int r = 0;
 686
 687         /* Make sure get_user_pages_done() can cleanup gracefully */
 688         *range = NULL;
 689
 690         mm = bo->notifier.mm;
 691         if (unlikely(!mm)) {
 692                 DRM_DEBUG_DRIVER("BO is not registered?\n");
 693                 return -EFAULT;
 694         }
 695
 696         if (!mmget_not_zero(mm)) /* Happens during process shutdown */
 697                 return -ESRCH;
 698
 699         mmap_read_lock(mm);
 700         vma = vma_lookup(mm, start);
 701         if (unlikely(!vma)) {
 702                 r = -EFAULT;
 703                 goto out_unlock;
 704         }
 705         if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) &&
 706                 vma->vm_file)) {
 707                 r = -EPERM;
 708                 goto out_unlock;
 709         }
 710
 711         readonly = amdgpu_ttm_tt_is_readonly(ttm);
 712         r = amdgpu_hmm_range_get_pages(&bo->notifier, start, ttm->num_pages,
 713                                        readonly, NULL, pages, range);
 714 out_unlock:
 715         mmap_read_unlock(mm);
 716         if (r)
 717                 pr_debug("failed %d to get user pages 0x%lx\n", r, start);
 718
 719         mmput(mm);
 720
 721         return r;
 722 }
 723
 724 /* amdgpu_ttm_tt_discard_user_pages - Discard range and pfn array allocations
 725  */
 726 void amdgpu_ttm_tt_discard_user_pages(struct ttm_tt *ttm,
 727                                       struct hmm_range *range)
 728 {
 729         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 730
 731         if (gtt && gtt->userptr && range)
 732                 amdgpu_hmm_range_get_pages_done(range);
 733 }
 734
 735 /*
 736  * amdgpu_ttm_tt_get_user_pages_done - stop HMM track the CPU page table change
 737  * Check if the pages backing this ttm range have been invalidated
 738  *
 739  * Returns: true if pages are still valid
 740  */
 741 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm,
 742                                        struct hmm_range *range)
 743 {
 744         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 745
 746         if (!gtt || !gtt->userptr || !range)
 747                 return false;
 748
 749         DRM_DEBUG_DRIVER("user_pages_done 0x%llx pages 0x%x\n",
 750                 gtt->userptr, ttm->num_pages);
 751
 752         WARN_ONCE(!range->hmm_pfns, "No user pages to check\n");
 753
 754         return !amdgpu_hmm_range_get_pages_done(range);
 755 }
 756 #endif
 757
 758 /*
 759  * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
 760  *
 761  * Called by amdgpu_cs_list_validate(). This creates the page list
 762  * that backs user memory and will ultimately be mapped into the device
 763  * address space.
 764  */
 765 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
 766 {
 767         unsigned long i;
 768
 769         for (i = 0; i < ttm->num_pages; ++i)
 770                 ttm->pages[i] = pages ? pages[i] : NULL;
 771 }
 772
 773 /*
 774  * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages
 775  *
 776  * Called by amdgpu_ttm_backend_bind()
 777  **/
 778 static int amdgpu_ttm_tt_pin_userptr(struct ttm_device *bdev,
 779                                      struct ttm_tt *ttm)
 780 {
 781         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 782         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 783         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 784         enum dma_data_direction direction = write ?
 785                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 786         int r;
 787
 788         /* Allocate an SG array and squash pages into it */
 789         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 790                                       (u64)ttm->num_pages << PAGE_SHIFT,
 791                                       GFP_KERNEL);
 792         if (r)
 793                 goto release_sg;
 794
 795         /* Map SG to device */
 796         r = dma_map_sgtable(adev->dev, ttm->sg, direction, 0);
 797         if (r)
 798                 goto release_sg;
 799
 800         /* convert SG to linear array of pages and dma addresses */
 801         drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 802                                        ttm->num_pages);
 803
 804         return 0;
 805
 806 release_sg:
 807         kfree(ttm->sg);
 808         ttm->sg = NULL;
 809         return r;
 810 }
 811
 812 /*
 813  * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
 814  */
 815 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_device *bdev,
 816                                         struct ttm_tt *ttm)
 817 {
 818         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 819         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 820         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 821         enum dma_data_direction direction = write ?
 822                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 823
 824         /* double check that we don't free the table twice */
 825         if (!ttm->sg || !ttm->sg->sgl)
 826                 return;
 827
 828         /* unmap the pages mapped to the device */
 829         dma_unmap_sgtable(adev->dev, ttm->sg, direction, 0);
 830         sg_free_table(ttm->sg);
 831 }
 832
 833 /*
 834  * total_pages is constructed as MQD0+CtrlStack0 + MQD1+CtrlStack1 + ...
 835  * MQDn+CtrlStackn where n is the number of XCCs per partition.
 836  * pages_per_xcc is the size of one MQD+CtrlStack. The first page is MQD
 837  * and uses memory type default, UC. The rest of pages_per_xcc are
 838  * Ctrl stack and modify their memory type to NC.
 839  */
 840 static void amdgpu_ttm_gart_bind_gfx9_mqd(struct amdgpu_device *adev,
 841                                 struct ttm_tt *ttm, uint64_t flags)
 842 {
 843         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 844         uint64_t total_pages = ttm->num_pages;
 845         int num_xcc = max(1U, adev->gfx.num_xcc_per_xcp);
 846         uint64_t page_idx, pages_per_xcc;
 847         int i;
 848         uint64_t ctrl_flags = (flags & ~AMDGPU_PTE_MTYPE_VG10_MASK) |
 849                         AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC);
 850
 851         pages_per_xcc = total_pages;
 852         do_div(pages_per_xcc, num_xcc);
 853
 854         for (i = 0, page_idx = 0; i < num_xcc; i++, page_idx += pages_per_xcc) {
 855                 /* MQD page: use default flags */
 856                 amdgpu_gart_bind(adev,
 857                                 gtt->offset + (page_idx << PAGE_SHIFT),
 858                                 1, &gtt->ttm.dma_address[page_idx], flags);
 859                 /*
 860                  * Ctrl pages - modify the memory type to NC (ctrl_flags) from
 861                  * the second page of the BO onward.
 862                  */
 863                 amdgpu_gart_bind(adev,
 864                                 gtt->offset + ((page_idx + 1) << PAGE_SHIFT),
 865                                 pages_per_xcc - 1,
 866                                 &gtt->ttm.dma_address[page_idx + 1],
 867                                 ctrl_flags);
 868         }
 869 }
 870
 871 static void amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
 872                                  struct ttm_buffer_object *tbo,
 873                                  uint64_t flags)
 874 {
 875         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
 876         struct ttm_tt *ttm = tbo->ttm;
 877         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 878
 879         if (amdgpu_bo_encrypted(abo))
 880                 flags |= AMDGPU_PTE_TMZ;
 881
 882         if (abo->flags & AMDGPU_GEM_CREATE_CP_MQD_GFX9) {
 883                 amdgpu_ttm_gart_bind_gfx9_mqd(adev, ttm, flags);
 884         } else {
 885                 amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 886                                  gtt->ttm.dma_address, flags);
 887         }
 888         gtt->bound = true;
 889 }
 890
 891 /*
 892  * amdgpu_ttm_backend_bind - Bind GTT memory
 893  *
 894  * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
 895  * This handles binding GTT memory to the device address space.
 896  */
 897 static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
 898                                    struct ttm_tt *ttm,
 899                                    struct ttm_resource *bo_mem)
 900 {
 901         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 902         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
 903         uint64_t flags;
 904         int r;
 905
 906         if (!bo_mem)
 907                 return -EINVAL;
 908
 909         if (gtt->bound)
 910                 return 0;
 911
 912         if (gtt->userptr) {
 913                 r = amdgpu_ttm_tt_pin_userptr(bdev, ttm);
 914                 if (r) {
 915                         DRM_ERROR("failed to pin userptr\n");
 916                         return r;
 917                 }
 918         } else if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) {
 919                 if (!ttm->sg) {
 920                         struct dma_buf_attachment *attach;
 921                         struct sg_table *sgt;
 922
 923                         attach = gtt->gobj->import_attach;
 924                         sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
 925                         if (IS_ERR(sgt))
 926                                 return PTR_ERR(sgt);
 927
 928                         ttm->sg = sgt;
 929                 }
 930
 931                 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 932                                                ttm->num_pages);
 933         }
 934
 935         if (!ttm->num_pages) {
 936                 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
 937                      ttm->num_pages, bo_mem, ttm);
 938         }
 939
 940         if (bo_mem->mem_type != TTM_PL_TT ||
 941             !amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
 942                 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
 943                 return 0;
 944         }
 945
 946         /* compute PTE flags relevant to this BO memory */
 947         flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
 948
 949         /* bind pages into GART page tables */
 950         gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
 951         amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 952                          gtt->ttm.dma_address, flags);
 953         gtt->bound = true;
 954         return 0;
 955 }
 956
 957 /*
 958  * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either
 959  * through AGP or GART aperture.
 960  *
 961  * If bo is accessible through AGP aperture, then use AGP aperture
 962  * to access bo; otherwise allocate logical space in GART aperture
 963  * and map bo to GART aperture.
 964  */
 965 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
 966 {
 967         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 968         struct ttm_operation_ctx ctx = { false, false };
 969         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(bo->ttm);
 970         struct ttm_placement placement;
 971         struct ttm_place placements;
 972         struct ttm_resource *tmp;
 973         uint64_t addr, flags;
 974         int r;
 975
 976         if (bo->resource->start != AMDGPU_BO_INVALID_OFFSET)
 977                 return 0;
 978
 979         addr = amdgpu_gmc_agp_addr(bo);
 980         if (addr != AMDGPU_BO_INVALID_OFFSET)
 981                 return 0;
 982
 983         /* allocate GART space */
 984         placement.num_placement = 1;
 985         placement.placement = &placements;
 986         placements.fpfn = 0;
 987         placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
 988         placements.mem_type = TTM_PL_TT;
 989         placements.flags = bo->resource->placement;
 990
 991         r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
 992         if (unlikely(r))
 993                 return r;
 994
 995         /* compute PTE flags for this buffer object */
 996         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, tmp);
 997
 998         /* Bind pages */
 999         gtt->offset = (u64)tmp->start << PAGE_SHIFT;
1000         amdgpu_ttm_gart_bind(adev, bo, flags);
1001         amdgpu_gart_invalidate_tlb(adev);
1002         ttm_resource_free(bo, &bo->resource);
1003         ttm_bo_assign_mem(bo, tmp);
1004
1005         return 0;
1006 }
1007
1008 /*
1009  * amdgpu_ttm_recover_gart - Rebind GTT pages
1010  *
1011  * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
1012  * rebind GTT pages during a GPU reset.
1013  */
1014 void amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
1015 {
1016         struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
1017         uint64_t flags;
1018
1019         if (!tbo->ttm)
1020                 return;
1021
1022         flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, tbo->resource);
1023         amdgpu_ttm_gart_bind(adev, tbo, flags);
1024 }
1025
1026 /*
1027  * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
1028  *
1029  * Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
1030  * ttm_tt_destroy().
1031  */
1032 static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev,
1033                                       struct ttm_tt *ttm)
1034 {
1035         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1036         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1037
1038         /* if the pages have userptr pinning then clear that first */
1039         if (gtt->userptr) {
1040                 amdgpu_ttm_tt_unpin_userptr(bdev, ttm);
1041         } else if (ttm->sg && gtt->gobj->import_attach) {
1042                 struct dma_buf_attachment *attach;
1043
1044                 attach = gtt->gobj->import_attach;
1045                 dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL);
1046                 ttm->sg = NULL;
1047         }
1048
1049         if (!gtt->bound)
1050                 return;
1051
1052         if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
1053                 return;
1054
1055         /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
1056         amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
1057         gtt->bound = false;
1058 }
1059
1060 static void amdgpu_ttm_backend_destroy(struct ttm_device *bdev,
1061                                        struct ttm_tt *ttm)
1062 {
1063         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1064
1065         if (gtt->usertask)
1066                 put_task_struct(gtt->usertask);
1067
1068         ttm_tt_fini(&gtt->ttm);
1069         kfree(gtt);
1070 }
1071
1072 /**
1073  * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
1074  *
1075  * @bo: The buffer object to create a GTT ttm_tt object around
1076  * @page_flags: Page flags to be added to the ttm_tt object
1077  *
1078  * Called by ttm_tt_create().
1079  */
1080 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
1081                                            uint32_t page_flags)
1082 {
1083         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1084         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1085         struct amdgpu_ttm_tt *gtt;
1086         enum ttm_caching caching;
1087
1088         gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
1089         if (!gtt)
1090                 return NULL;
1091
1092         gtt->gobj = &bo->base;
1093         if (adev->gmc.mem_partitions && abo->xcp_id >= 0)
1094                 gtt->pool_id = KFD_XCP_MEM_ID(adev, abo->xcp_id);
1095         else
1096                 gtt->pool_id = abo->xcp_id;
1097
1098         if (abo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
1099                 caching = ttm_write_combined;
1100         else
1101                 caching = ttm_cached;
1102
1103         /* allocate space for the uninitialized page entries */
1104         if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags, caching)) {
1105                 kfree(gtt);
1106                 return NULL;
1107         }
1108         return &gtt->ttm;
1109 }
1110
1111 /*
1112  * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
1113  *
1114  * Map the pages of a ttm_tt object to an address space visible
1115  * to the underlying device.
1116  */
1117 static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
1118                                   struct ttm_tt *ttm,
1119                                   struct ttm_operation_ctx *ctx)
1120 {
1121         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1122         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1123         struct ttm_pool *pool;
1124         pgoff_t i;
1125         int ret;
1126
1127         /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
1128         if (gtt->userptr) {
1129                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1130                 if (!ttm->sg)
1131                         return -ENOMEM;
1132                 return 0;
1133         }
1134
1135         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1136                 return 0;
1137
1138         if (adev->mman.ttm_pools && gtt->pool_id >= 0)
1139                 pool = &adev->mman.ttm_pools[gtt->pool_id];
1140         else
1141                 pool = &adev->mman.bdev.pool;
1142         ret = ttm_pool_alloc(pool, ttm, ctx);
1143         if (ret)
1144                 return ret;
1145
1146         for (i = 0; i < ttm->num_pages; ++i)
1147                 ttm->pages[i]->mapping = bdev->dev_mapping;
1148
1149         return 0;
1150 }
1151
1152 /*
1153  * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
1154  *
1155  * Unmaps pages of a ttm_tt object from the device address space and
1156  * unpopulates the page array backing it.
1157  */
1158 static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
1159                                      struct ttm_tt *ttm)
1160 {
1161         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1162         struct amdgpu_device *adev;
1163         struct ttm_pool *pool;
1164         pgoff_t i;
1165
1166         amdgpu_ttm_backend_unbind(bdev, ttm);
1167
1168         if (gtt->userptr) {
1169                 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1170                 kfree(ttm->sg);
1171                 ttm->sg = NULL;
1172                 return;
1173         }
1174
1175         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1176                 return;
1177
1178         for (i = 0; i < ttm->num_pages; ++i)
1179                 ttm->pages[i]->mapping = NULL;
1180
1181         adev = amdgpu_ttm_adev(bdev);
1182
1183         if (adev->mman.ttm_pools && gtt->pool_id >= 0)
1184                 pool = &adev->mman.ttm_pools[gtt->pool_id];
1185         else
1186                 pool = &adev->mman.bdev.pool;
1187
1188         return ttm_pool_free(pool, ttm);
1189 }
1190
1191 /**
1192  * amdgpu_ttm_tt_get_userptr - Return the userptr GTT ttm_tt for the current
1193  * task
1194  *
1195  * @tbo: The ttm_buffer_object that contains the userptr
1196  * @user_addr:  The returned value
1197  */
1198 int amdgpu_ttm_tt_get_userptr(const struct ttm_buffer_object *tbo,
1199                               uint64_t *user_addr)
1200 {
1201         struct amdgpu_ttm_tt *gtt;
1202
1203         if (!tbo->ttm)
1204                 return -EINVAL;
1205
1206         gtt = (void *)tbo->ttm;
1207         *user_addr = gtt->userptr;
1208         return 0;
1209 }
1210
1211 /**
1212  * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
1213  * task
1214  *
1215  * @bo: The ttm_buffer_object to bind this userptr to
1216  * @addr:  The address in the current tasks VM space to use
1217  * @flags: Requirements of userptr object.
1218  *
1219  * Called by amdgpu_gem_userptr_ioctl() and kfd_ioctl_alloc_memory_of_gpu() to
1220  * bind userptr pages to current task and by kfd_ioctl_acquire_vm() to
1221  * initialize GPU VM for a KFD process.
1222  */
1223 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
1224                               uint64_t addr, uint32_t flags)
1225 {
1226         struct amdgpu_ttm_tt *gtt;
1227
1228         if (!bo->ttm) {
1229                 /* TODO: We want a separate TTM object type for userptrs */
1230                 bo->ttm = amdgpu_ttm_tt_create(bo, 0);
1231                 if (bo->ttm == NULL)
1232                         return -ENOMEM;
1233         }
1234
1235         /* Set TTM_TT_FLAG_EXTERNAL before populate but after create. */
1236         bo->ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
1237
1238         gtt = ttm_to_amdgpu_ttm_tt(bo->ttm);
1239         gtt->userptr = addr;
1240         gtt->userflags = flags;
1241
1242         if (gtt->usertask)
1243                 put_task_struct(gtt->usertask);
1244         gtt->usertask = current->group_leader;
1245         get_task_struct(gtt->usertask);
1246
1247         return 0;
1248 }
1249
1250 /*
1251  * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
1252  */
1253 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1254 {
1255         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1256
1257         if (gtt == NULL)
1258                 return NULL;
1259
1260         if (gtt->usertask == NULL)
1261                 return NULL;
1262
1263         return gtt->usertask->mm;
1264 }
1265
1266 /*
1267  * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
1268  * address range for the current task.
1269  *
1270  */
1271 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1272                                   unsigned long end, unsigned long *userptr)
1273 {
1274         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1275         unsigned long size;
1276
1277         if (gtt == NULL || !gtt->userptr)
1278                 return false;
1279
1280         /* Return false if no part of the ttm_tt object lies within
1281          * the range
1282          */
1283         size = (unsigned long)gtt->ttm.num_pages * PAGE_SIZE;
1284         if (gtt->userptr > end || gtt->userptr + size <= start)
1285                 return false;
1286
1287         if (userptr)
1288                 *userptr = gtt->userptr;
1289         return true;
1290 }
1291
1292 /*
1293  * amdgpu_ttm_tt_is_userptr - Have the pages backing by userptr?
1294  */
1295 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm)
1296 {
1297         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1298
1299         if (gtt == NULL || !gtt->userptr)
1300                 return false;
1301
1302         return true;
1303 }
1304
1305 /*
1306  * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
1307  */
1308 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1309 {
1310         struct amdgpu_ttm_tt *gtt = ttm_to_amdgpu_ttm_tt(ttm);
1311
1312         if (gtt == NULL)
1313                 return false;
1314
1315         return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1316 }
1317
1318 /**
1319  * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object
1320  *
1321  * @ttm: The ttm_tt object to compute the flags for
1322  * @mem: The memory registry backing this ttm_tt object
1323  *
1324  * Figure out the flags to use for a VM PDE (Page Directory Entry).
1325  */
1326 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
1327 {
1328         uint64_t flags = 0;
1329
1330         if (mem && mem->mem_type != TTM_PL_SYSTEM)
1331                 flags |= AMDGPU_PTE_VALID;
1332
1333         if (mem && (mem->mem_type == TTM_PL_TT ||
1334                     mem->mem_type == AMDGPU_PL_DOORBELL ||
1335                     mem->mem_type == AMDGPU_PL_PREEMPT)) {
1336                 flags |= AMDGPU_PTE_SYSTEM;
1337
1338                 if (ttm->caching == ttm_cached)
1339                         flags |= AMDGPU_PTE_SNOOPED;
1340         }
1341
1342         if (mem && mem->mem_type == TTM_PL_VRAM &&
1343                         mem->bus.caching == ttm_cached)
1344                 flags |= AMDGPU_PTE_SNOOPED;
1345
1346         return flags;
1347 }
1348
1349 /**
1350  * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
1351  *
1352  * @adev: amdgpu_device pointer
1353  * @ttm: The ttm_tt object to compute the flags for
1354  * @mem: The memory registry backing this ttm_tt object
1355  *
1356  * Figure out the flags to use for a VM PTE (Page Table Entry).
1357  */
1358 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1359                                  struct ttm_resource *mem)
1360 {
1361         uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
1362
1363         flags |= adev->gart.gart_pte_flags;
1364         flags |= AMDGPU_PTE_READABLE;
1365
1366         if (!amdgpu_ttm_tt_is_readonly(ttm))
1367                 flags |= AMDGPU_PTE_WRITEABLE;
1368
1369         return flags;
1370 }
1371
1372 /*
1373  * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
1374  * object.
1375  *
1376  * Return true if eviction is sensible. Called by ttm_mem_evict_first() on
1377  * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
1378  * it can find space for a new object and by ttm_bo_force_list_clean() which is
1379  * used to clean out a memory space.
1380  */
1381 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1382                                             const struct ttm_place *place)
1383 {
1384         struct dma_resv_iter resv_cursor;
1385         struct dma_fence *f;
1386
1387         if (!amdgpu_bo_is_amdgpu_bo(bo))
1388                 return ttm_bo_eviction_valuable(bo, place);
1389
1390         /* Swapout? */
1391         if (bo->resource->mem_type == TTM_PL_SYSTEM)
1392                 return true;
1393
1394         if (bo->type == ttm_bo_type_kernel &&
1395             !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
1396                 return false;
1397
1398         /* If bo is a KFD BO, check if the bo belongs to the current process.
1399          * If true, then return false as any KFD process needs all its BOs to
1400          * be resident to run successfully
1401          */
1402         dma_resv_for_each_fence(&resv_cursor, bo->base.resv,
1403                                 DMA_RESV_USAGE_BOOKKEEP, f) {
1404                 if (amdkfd_fence_check_mm(f, current->mm))
1405                         return false;
1406         }
1407
1408         /* Preemptible BOs don't own system resources managed by the
1409          * driver (pages, VRAM, GART space). They point to resources
1410          * owned by someone else (e.g. pageable memory in user mode
1411          * or a DMABuf). They are used in a preemptible context so we
1412          * can guarantee no deadlocks and good QoS in case of MMU
1413          * notifiers or DMABuf move notifiers from the resource owner.
1414          */
1415         if (bo->resource->mem_type == AMDGPU_PL_PREEMPT)
1416                 return false;
1417
1418         if (bo->resource->mem_type == TTM_PL_TT &&
1419             amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
1420                 return false;
1421
1422         return ttm_bo_eviction_valuable(bo, place);
1423 }
1424
1425 static void amdgpu_ttm_vram_mm_access(struct amdgpu_device *adev, loff_t pos,
1426                                       void *buf, size_t size, bool write)
1427 {
1428         while (size) {
1429                 uint64_t aligned_pos = ALIGN_DOWN(pos, 4);
1430                 uint64_t bytes = 4 - (pos & 0x3);
1431                 uint32_t shift = (pos & 0x3) * 8;
1432                 uint32_t mask = 0xffffffff << shift;
1433                 uint32_t value = 0;
1434
1435                 if (size < bytes) {
1436                         mask &= 0xffffffff >> (bytes - size) * 8;
1437                         bytes = size;
1438                 }
1439
1440                 if (mask != 0xffffffff) {
1441                         amdgpu_device_mm_access(adev, aligned_pos, &value, 4, false);
1442                         if (write) {
1443                                 value &= ~mask;
1444                                 value |= (*(uint32_t *)buf << shift) & mask;
1445                                 amdgpu_device_mm_access(adev, aligned_pos, &value, 4, true);
1446                         } else {
1447                                 value = (value & mask) >> shift;
1448                                 memcpy(buf, &value, bytes);
1449                         }
1450                 } else {
1451                         amdgpu_device_mm_access(adev, aligned_pos, buf, 4, write);
1452                 }
1453
1454                 pos += bytes;
1455                 buf += bytes;
1456                 size -= bytes;
1457         }
1458 }
1459
1460 static int amdgpu_ttm_access_memory_sdma(struct ttm_buffer_object *bo,
1461                                         unsigned long offset, void *buf,
1462                                         int len, int write)
1463 {
1464         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1465         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1466         struct amdgpu_res_cursor src_mm;
1467         struct amdgpu_job *job;
1468         struct dma_fence *fence;
1469         uint64_t src_addr, dst_addr;
1470         unsigned int num_dw;
1471         int r, idx;
1472
1473         if (len != PAGE_SIZE)
1474                 return -EINVAL;
1475
1476         if (!adev->mman.sdma_access_ptr)
1477                 return -EACCES;
1478
1479         if (!drm_dev_enter(adev_to_drm(adev), &idx))
1480                 return -ENODEV;
1481
1482         if (write)
1483                 memcpy(adev->mman.sdma_access_ptr, buf, len);
1484
1485         num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
1486         r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr,
1487                                      AMDGPU_FENCE_OWNER_UNDEFINED,
1488                                      num_dw * 4, AMDGPU_IB_POOL_DELAYED,
1489                                      &job);
1490         if (r)
1491                 goto out;
1492
1493         amdgpu_res_first(abo->tbo.resource, offset, len, &src_mm);
1494         src_addr = amdgpu_ttm_domain_start(adev, bo->resource->mem_type) +
1495                 src_mm.start;
1496         dst_addr = amdgpu_bo_gpu_offset(adev->mman.sdma_access_bo);
1497         if (write)
1498                 swap(src_addr, dst_addr);
1499
1500         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, dst_addr,
1501                                 PAGE_SIZE, 0);
1502
1503         amdgpu_ring_pad_ib(adev->mman.buffer_funcs_ring, &job->ibs[0]);
1504         WARN_ON(job->ibs[0].length_dw > num_dw);
1505
1506         fence = amdgpu_job_submit(job);
1507
1508         if (!dma_fence_wait_timeout(fence, false, adev->sdma_timeout))
1509                 r = -ETIMEDOUT;
1510         dma_fence_put(fence);
1511
1512         if (!(r || write))
1513                 memcpy(buf, adev->mman.sdma_access_ptr, len);
1514 out:
1515         drm_dev_exit(idx);
1516         return r;
1517 }
1518
1519 /**
1520  * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
1521  *
1522  * @bo:  The buffer object to read/write
1523  * @offset:  Offset into buffer object
1524  * @buf:  Secondary buffer to write/read from
1525  * @len: Length in bytes of access
1526  * @write:  true if writing
1527  *
1528  * This is used to access VRAM that backs a buffer object via MMIO
1529  * access for debugging purposes.
1530  */
1531 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1532                                     unsigned long offset, void *buf, int len,
1533                                     int write)
1534 {
1535         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1536         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1537         struct amdgpu_res_cursor cursor;
1538         int ret = 0;
1539
1540         if (bo->resource->mem_type != TTM_PL_VRAM)
1541                 return -EIO;
1542
1543         if (amdgpu_device_has_timeouts_enabled(adev) &&
1544                         !amdgpu_ttm_access_memory_sdma(bo, offset, buf, len, write))
1545                 return len;
1546
1547         amdgpu_res_first(bo->resource, offset, len, &cursor);
1548         while (cursor.remaining) {
1549                 size_t count, size = cursor.size;
1550                 loff_t pos = cursor.start;
1551
1552                 count = amdgpu_device_aper_access(adev, pos, buf, size, write);
1553                 size -= count;
1554                 if (size) {
1555                         /* using MM to access rest vram and handle un-aligned address */
1556                         pos += count;
1557                         buf += count;
1558                         amdgpu_ttm_vram_mm_access(adev, pos, buf, size, write);
1559                 }
1560
1561                 ret += cursor.size;
1562                 buf += cursor.size;
1563                 amdgpu_res_next(&cursor, cursor.size);
1564         }
1565
1566         return ret;
1567 }
1568
1569 static void
1570 amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo)
1571 {
1572         amdgpu_bo_move_notify(bo, false, NULL);
1573 }
1574
1575 static struct ttm_device_funcs amdgpu_bo_driver = {
1576         .ttm_tt_create = &amdgpu_ttm_tt_create,
1577         .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1578         .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1579         .ttm_tt_destroy = &amdgpu_ttm_backend_destroy,
1580         .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1581         .evict_flags = &amdgpu_evict_flags,
1582         .move = &amdgpu_bo_move,
1583         .delete_mem_notify = &amdgpu_bo_delete_mem_notify,
1584         .release_notify = &amdgpu_bo_release_notify,
1585         .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1586         .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1587         .access_memory = &amdgpu_ttm_access_memory,
1588 };
1589
1590 /*
1591  * Firmware Reservation functions
1592  */
1593 /**
1594  * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1595  *
1596  * @adev: amdgpu_device pointer
1597  *
1598  * free fw reserved vram if it has been reserved.
1599  */
1600 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1601 {
1602         amdgpu_bo_free_kernel(&adev->mman.fw_vram_usage_reserved_bo,
1603                 NULL, &adev->mman.fw_vram_usage_va);
1604 }
1605
1606 /*
1607  * Driver Reservation functions
1608  */
1609 /**
1610  * amdgpu_ttm_drv_reserve_vram_fini - free drv reserved vram
1611  *
1612  * @adev: amdgpu_device pointer
1613  *
1614  * free drv reserved vram if it has been reserved.
1615  */
1616 static void amdgpu_ttm_drv_reserve_vram_fini(struct amdgpu_device *adev)
1617 {
1618         amdgpu_bo_free_kernel(&adev->mman.drv_vram_usage_reserved_bo,
1619                                                   NULL,
1620                                                   &adev->mman.drv_vram_usage_va);
1621 }
1622
1623 /**
1624  * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1625  *
1626  * @adev: amdgpu_device pointer
1627  *
1628  * create bo vram reservation from fw.
1629  */
1630 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1631 {
1632         uint64_t vram_size = adev->gmc.visible_vram_size;
1633
1634         adev->mman.fw_vram_usage_va = NULL;
1635         adev->mman.fw_vram_usage_reserved_bo = NULL;
1636
1637         if (adev->mman.fw_vram_usage_size == 0 ||
1638             adev->mman.fw_vram_usage_size > vram_size)
1639                 return 0;
1640
1641         return amdgpu_bo_create_kernel_at(adev,
1642                                           adev->mman.fw_vram_usage_start_offset,
1643                                           adev->mman.fw_vram_usage_size,
1644                                           &adev->mman.fw_vram_usage_reserved_bo,
1645                                           &adev->mman.fw_vram_usage_va);
1646 }
1647
1648 /**
1649  * amdgpu_ttm_drv_reserve_vram_init - create bo vram reservation from driver
1650  *
1651  * @adev: amdgpu_device pointer
1652  *
1653  * create bo vram reservation from drv.
1654  */
1655 static int amdgpu_ttm_drv_reserve_vram_init(struct amdgpu_device *adev)
1656 {
1657         u64 vram_size = adev->gmc.visible_vram_size;
1658
1659         adev->mman.drv_vram_usage_va = NULL;
1660         adev->mman.drv_vram_usage_reserved_bo = NULL;
1661
1662         if (adev->mman.drv_vram_usage_size == 0 ||
1663             adev->mman.drv_vram_usage_size > vram_size)
1664                 return 0;
1665
1666         return amdgpu_bo_create_kernel_at(adev,
1667                                           adev->mman.drv_vram_usage_start_offset,
1668                                           adev->mman.drv_vram_usage_size,
1669                                           &adev->mman.drv_vram_usage_reserved_bo,
1670                                           &adev->mman.drv_vram_usage_va);
1671 }
1672
1673 /*
1674  * Memoy training reservation functions
1675  */
1676
1677 /**
1678  * amdgpu_ttm_training_reserve_vram_fini - free memory training reserved vram
1679  *
1680  * @adev: amdgpu_device pointer
1681  *
1682  * free memory training reserved vram if it has been reserved.
1683  */
1684 static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev)
1685 {
1686         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1687
1688         ctx->init = PSP_MEM_TRAIN_NOT_SUPPORT;
1689         amdgpu_bo_free_kernel(&ctx->c2p_bo, NULL, NULL);
1690         ctx->c2p_bo = NULL;
1691
1692         return 0;
1693 }
1694
1695 static void amdgpu_ttm_training_data_block_init(struct amdgpu_device *adev,
1696                                                 uint32_t reserve_size)
1697 {
1698         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1699
1700         memset(ctx, 0, sizeof(*ctx));
1701
1702         ctx->c2p_train_data_offset =
1703                 ALIGN((adev->gmc.mc_vram_size - reserve_size - SZ_1M), SZ_1M);
1704         ctx->p2c_train_data_offset =
1705                 (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET);
1706         ctx->train_data_size =
1707                 GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES;
1708
1709         DRM_DEBUG("train_data_size:%llx,p2c_train_data_offset:%llx,c2p_train_data_offset:%llx.\n",
1710                         ctx->train_data_size,
1711                         ctx->p2c_train_data_offset,
1712                         ctx->c2p_train_data_offset);
1713 }
1714
1715 /*
1716  * reserve TMR memory at the top of VRAM which holds
1717  * IP Discovery data and is protected by PSP.
1718  */
1719 static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
1720 {
1721         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1722         bool mem_train_support = false;
1723         uint32_t reserve_size = 0;
1724         int ret;
1725
1726         if (adev->bios && !amdgpu_sriov_vf(adev)) {
1727                 if (amdgpu_atomfirmware_mem_training_supported(adev))
1728                         mem_train_support = true;
1729                 else
1730                         DRM_DEBUG("memory training does not support!\n");
1731         }
1732
1733         /*
1734          * Query reserved tmr size through atom firmwareinfo for Sienna_Cichlid and onwards for all
1735          * the use cases (IP discovery/G6 memory training/profiling/diagnostic data.etc)
1736          *
1737          * Otherwise, fallback to legacy approach to check and reserve tmr block for ip
1738          * discovery data and G6 memory training data respectively
1739          */
1740         if (adev->bios)
1741                 reserve_size =
1742                         amdgpu_atomfirmware_get_fw_reserved_fb_size(adev);
1743
1744         if (!adev->bios &&
1745             amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 3))
1746                 reserve_size = max(reserve_size, (uint32_t)280 << 20);
1747         else if (!reserve_size)
1748                 reserve_size = DISCOVERY_TMR_OFFSET;
1749
1750         if (mem_train_support) {
1751                 /* reserve vram for mem train according to TMR location */
1752                 amdgpu_ttm_training_data_block_init(adev, reserve_size);
1753                 ret = amdgpu_bo_create_kernel_at(adev,
1754                                                  ctx->c2p_train_data_offset,
1755                                                  ctx->train_data_size,
1756                                                  &ctx->c2p_bo,
1757                                                  NULL);
1758                 if (ret) {
1759                         DRM_ERROR("alloc c2p_bo failed(%d)!\n", ret);
1760                         amdgpu_ttm_training_reserve_vram_fini(adev);
1761                         return ret;
1762                 }
1763                 ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS;
1764         }
1765
1766         if (!adev->gmc.is_app_apu) {
1767                 ret = amdgpu_bo_create_kernel_at(
1768                         adev, adev->gmc.real_vram_size - reserve_size,
1769                         reserve_size, &adev->mman.fw_reserved_memory, NULL);
1770                 if (ret) {
1771                         DRM_ERROR("alloc tmr failed(%d)!\n", ret);
1772                         amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory,
1773                                               NULL, NULL);
1774                         return ret;
1775                 }
1776         } else {
1777                 DRM_DEBUG_DRIVER("backdoor fw loading path for PSP TMR, no reservation needed\n");
1778         }
1779
1780         return 0;
1781 }
1782
1783 static int amdgpu_ttm_pools_init(struct amdgpu_device *adev)
1784 {
1785         int i;
1786
1787         if (!adev->gmc.is_app_apu || !adev->gmc.num_mem_partitions)
1788                 return 0;
1789
1790         adev->mman.ttm_pools = kcalloc(adev->gmc.num_mem_partitions,
1791                                        sizeof(*adev->mman.ttm_pools),
1792                                        GFP_KERNEL);
1793         if (!adev->mman.ttm_pools)
1794                 return -ENOMEM;
1795
1796         for (i = 0; i < adev->gmc.num_mem_partitions; i++) {
1797                 ttm_pool_init(&adev->mman.ttm_pools[i], adev->dev,
1798                               adev->gmc.mem_partitions[i].numa.node,
1799                               false, false);
1800         }
1801         return 0;
1802 }
1803
1804 static void amdgpu_ttm_pools_fini(struct amdgpu_device *adev)
1805 {
1806         int i;
1807
1808         if (!adev->gmc.is_app_apu || !adev->mman.ttm_pools)
1809                 return;
1810
1811         for (i = 0; i < adev->gmc.num_mem_partitions; i++)
1812                 ttm_pool_fini(&adev->mman.ttm_pools[i]);
1813
1814         kfree(adev->mman.ttm_pools);
1815         adev->mman.ttm_pools = NULL;
1816 }
1817
1818 /*
1819  * amdgpu_ttm_init - Init the memory management (ttm) as well as various
1820  * gtt/vram related fields.
1821  *
1822  * This initializes all of the memory space pools that the TTM layer
1823  * will need such as the GTT space (system memory mapped to the device),
1824  * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
1825  * can be mapped per VMID.
1826  */
1827 int amdgpu_ttm_init(struct amdgpu_device *adev)
1828 {
1829         uint64_t gtt_size;
1830         int r;
1831
1832         mutex_init(&adev->mman.gtt_window_lock);
1833
1834         /* No others user of address space so set it to 0 */
1835         r = ttm_device_init(&adev->mman.bdev, &amdgpu_bo_driver, adev->dev,
1836                                adev_to_drm(adev)->anon_inode->i_mapping,
1837                                adev_to_drm(adev)->vma_offset_manager,
1838                                adev->need_swiotlb,
1839                                dma_addressing_limited(adev->dev));
1840         if (r) {
1841                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1842                 return r;
1843         }
1844
1845         r = amdgpu_ttm_pools_init(adev);
1846         if (r) {
1847                 DRM_ERROR("failed to init ttm pools(%d).\n", r);
1848                 return r;
1849         }
1850         adev->mman.initialized = true;
1851
1852         /* Initialize VRAM pool with all of VRAM divided into pages */
1853         r = amdgpu_vram_mgr_init(adev);
1854         if (r) {
1855                 DRM_ERROR("Failed initializing VRAM heap.\n");
1856                 return r;
1857         }
1858
1859         /* Change the size here instead of the init above so only lpfn is affected */
1860         amdgpu_ttm_set_buffer_funcs_status(adev, false);
1861 #ifdef CONFIG_64BIT
1862 #ifdef CONFIG_X86
1863         if (adev->gmc.xgmi.connected_to_cpu)
1864                 adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base,
1865                                 adev->gmc.visible_vram_size);
1866
1867         else if (adev->gmc.is_app_apu)
1868                 DRM_DEBUG_DRIVER(
1869                         "No need to ioremap when real vram size is 0\n");
1870         else
1871 #endif
1872                 adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
1873                                 adev->gmc.visible_vram_size);
1874 #endif
1875
1876         /*
1877          *The reserved vram for firmware must be pinned to the specified
1878          *place on the VRAM, so reserve it early.
1879          */
1880         r = amdgpu_ttm_fw_reserve_vram_init(adev);
1881         if (r)
1882                 return r;
1883
1884         /*
1885          *The reserved vram for driver must be pinned to the specified
1886          *place on the VRAM, so reserve it early.
1887          */
1888         r = amdgpu_ttm_drv_reserve_vram_init(adev);
1889         if (r)
1890                 return r;
1891
1892         /*
1893          * only NAVI10 and onwards ASIC support for IP discovery.
1894          * If IP discovery enabled, a block of memory should be
1895          * reserved for IP discovey.
1896          */
1897         if (adev->mman.discovery_bin) {
1898                 r = amdgpu_ttm_reserve_tmr(adev);
1899                 if (r)
1900                         return r;
1901         }
1902
1903         /* allocate memory as required for VGA
1904          * This is used for VGA emulation and pre-OS scanout buffers to
1905          * avoid display artifacts while transitioning between pre-OS
1906          * and driver.
1907          */
1908         if (!adev->gmc.is_app_apu) {
1909                 r = amdgpu_bo_create_kernel_at(adev, 0,
1910                                                adev->mman.stolen_vga_size,
1911                                                &adev->mman.stolen_vga_memory,
1912                                                NULL);
1913                 if (r)
1914                         return r;
1915
1916                 r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_vga_size,
1917                                                adev->mman.stolen_extended_size,
1918                                                &adev->mman.stolen_extended_memory,
1919                                                NULL);
1920
1921                 if (r)
1922                         return r;
1923
1924                 r = amdgpu_bo_create_kernel_at(adev,
1925                                                adev->mman.stolen_reserved_offset,
1926                                                adev->mman.stolen_reserved_size,
1927                                                &adev->mman.stolen_reserved_memory,
1928                                                NULL);
1929                 if (r)
1930                         return r;
1931         } else {
1932                 DRM_DEBUG_DRIVER("Skipped stolen memory reservation\n");
1933         }
1934
1935         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1936                  (unsigned int)(adev->gmc.real_vram_size / (1024 * 1024)));
1937
1938         /* Compute GTT size, either based on TTM limit
1939          * or whatever the user passed on module init.
1940          */
1941         if (amdgpu_gtt_size == -1)
1942                 gtt_size = ttm_tt_pages_limit() << PAGE_SHIFT;
1943         else
1944                 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1945
1946         /* Initialize GTT memory pool */
1947         r = amdgpu_gtt_mgr_init(adev, gtt_size);
1948         if (r) {
1949                 DRM_ERROR("Failed initializing GTT heap.\n");
1950                 return r;
1951         }
1952         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1953                  (unsigned int)(gtt_size / (1024 * 1024)));
1954
1955         /* Initiailize doorbell pool on PCI BAR */
1956         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_DOORBELL, adev->doorbell.size / PAGE_SIZE);
1957         if (r) {
1958                 DRM_ERROR("Failed initializing doorbell heap.\n");
1959                 return r;
1960         }
1961
1962         /* Create a boorbell page for kernel usages */
1963         r = amdgpu_doorbell_create_kernel_doorbells(adev);
1964         if (r) {
1965                 DRM_ERROR("Failed to initialize kernel doorbells.\n");
1966                 return r;
1967         }
1968
1969         /* Initialize preemptible memory pool */
1970         r = amdgpu_preempt_mgr_init(adev);
1971         if (r) {
1972                 DRM_ERROR("Failed initializing PREEMPT heap.\n");
1973                 return r;
1974         }
1975
1976         /* Initialize various on-chip memory pools */
1977         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size);
1978         if (r) {
1979                 DRM_ERROR("Failed initializing GDS heap.\n");
1980                 return r;
1981         }
1982
1983         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GWS, adev->gds.gws_size);
1984         if (r) {
1985                 DRM_ERROR("Failed initializing gws heap.\n");
1986                 return r;
1987         }
1988
1989         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_OA, adev->gds.oa_size);
1990         if (r) {
1991                 DRM_ERROR("Failed initializing oa heap.\n");
1992                 return r;
1993         }
1994         if (amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
1995                                 AMDGPU_GEM_DOMAIN_GTT,
1996                                 &adev->mman.sdma_access_bo, NULL,
1997                                 &adev->mman.sdma_access_ptr))
1998                 DRM_WARN("Debug VRAM access will use slowpath MM access\n");
1999
2000         return 0;
2001 }
2002
2003 /*
2004  * amdgpu_ttm_fini - De-initialize the TTM memory pools
2005  */
2006 void amdgpu_ttm_fini(struct amdgpu_device *adev)
2007 {
2008         int idx;
2009
2010         if (!adev->mman.initialized)
2011                 return;
2012
2013         amdgpu_ttm_pools_fini(adev);
2014
2015         amdgpu_ttm_training_reserve_vram_fini(adev);
2016         /* return the stolen vga memory back to VRAM */
2017         if (!adev->gmc.is_app_apu) {
2018                 amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL);
2019                 amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL);
2020                 /* return the FW reserved memory back to VRAM */
2021                 amdgpu_bo_free_kernel(&adev->mman.fw_reserved_memory, NULL,
2022                                       NULL);
2023                 if (adev->mman.stolen_reserved_size)
2024                         amdgpu_bo_free_kernel(&adev->mman.stolen_reserved_memory,
2025                                               NULL, NULL);
2026         }
2027         amdgpu_bo_free_kernel(&adev->mman.sdma_access_bo, NULL,
2028                                         &adev->mman.sdma_access_ptr);
2029         amdgpu_ttm_fw_reserve_vram_fini(adev);
2030         amdgpu_ttm_drv_reserve_vram_fini(adev);
2031
2032         if (drm_dev_enter(adev_to_drm(adev), &idx)) {
2033
2034                 if (adev->mman.aper_base_kaddr)
2035                         iounmap(adev->mman.aper_base_kaddr);
2036                 adev->mman.aper_base_kaddr = NULL;
2037
2038                 drm_dev_exit(idx);
2039         }
2040
2041         amdgpu_vram_mgr_fini(adev);
2042         amdgpu_gtt_mgr_fini(adev);
2043         amdgpu_preempt_mgr_fini(adev);
2044         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS);
2045         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
2046         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
2047         ttm_device_fini(&adev->mman.bdev);
2048         adev->mman.initialized = false;
2049         DRM_INFO("amdgpu: ttm finalized\n");
2050 }
2051
2052 /**
2053  * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
2054  *
2055  * @adev: amdgpu_device pointer
2056  * @enable: true when we can use buffer functions.
2057  *
2058  * Enable/disable use of buffer functions during suspend/resume. This should
2059  * only be called at bootup or when userspace isn't running.
2060  */
2061 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
2062 {
2063         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
2064         uint64_t size;
2065         int r;
2066
2067         if (!adev->mman.initialized || amdgpu_in_reset(adev) ||
2068             adev->mman.buffer_funcs_enabled == enable || adev->gmc.is_app_apu)
2069                 return;
2070
2071         if (enable) {
2072                 struct amdgpu_ring *ring;
2073                 struct drm_gpu_scheduler *sched;
2074
2075                 ring = adev->mman.buffer_funcs_ring;
2076                 sched = &ring->sched;
2077                 r = drm_sched_entity_init(&adev->mman.high_pr,
2078                                           DRM_SCHED_PRIORITY_KERNEL, &sched,
2079                                           1, NULL);
2080                 if (r) {
2081                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
2082                                   r);
2083                         return;
2084                 }
2085
2086                 r = drm_sched_entity_init(&adev->mman.low_pr,
2087                                           DRM_SCHED_PRIORITY_NORMAL, &sched,
2088                                           1, NULL);
2089                 if (r) {
2090                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
2091                                   r);
2092                         goto error_free_entity;
2093                 }
2094         } else {
2095                 drm_sched_entity_destroy(&adev->mman.high_pr);
2096                 drm_sched_entity_destroy(&adev->mman.low_pr);
2097                 dma_fence_put(man->move);
2098                 man->move = NULL;
2099         }
2100
2101         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
2102         if (enable)
2103                 size = adev->gmc.real_vram_size;
2104         else
2105                 size = adev->gmc.visible_vram_size;
2106         man->size = size;
2107         adev->mman.buffer_funcs_enabled = enable;
2108
2109         return;
2110
2111 error_free_entity:
2112         drm_sched_entity_destroy(&adev->mman.high_pr);
2113 }
2114
2115 static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
2116                                   bool direct_submit,
2117                                   unsigned int num_dw,
2118                                   struct dma_resv *resv,
2119                                   bool vm_needs_flush,
2120                                   struct amdgpu_job **job,
2121                                   bool delayed)
2122 {
2123         enum amdgpu_ib_pool_type pool = direct_submit ?
2124                 AMDGPU_IB_POOL_DIRECT :
2125                 AMDGPU_IB_POOL_DELAYED;
2126         int r;
2127         struct drm_sched_entity *entity = delayed ? &adev->mman.low_pr :
2128                                                     &adev->mman.high_pr;
2129         r = amdgpu_job_alloc_with_ib(adev, entity,
2130                                      AMDGPU_FENCE_OWNER_UNDEFINED,
2131                                      num_dw * 4, pool, job);
2132         if (r)
2133                 return r;
2134
2135         if (vm_needs_flush) {
2136                 (*job)->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gmc.pdb0_bo ?
2137                                                         adev->gmc.pdb0_bo :
2138                                                         adev->gart.bo);
2139                 (*job)->vm_needs_flush = true;
2140         }
2141         if (!resv)
2142                 return 0;
2143
2144         return drm_sched_job_add_resv_dependencies(&(*job)->base, resv,
2145                                                    DMA_RESV_USAGE_BOOKKEEP);
2146 }
2147
2148 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
2149                        uint64_t dst_offset, uint32_t byte_count,
2150                        struct dma_resv *resv,
2151                        struct dma_fence **fence, bool direct_submit,
2152                        bool vm_needs_flush, uint32_t copy_flags)
2153 {
2154         struct amdgpu_device *adev = ring->adev;
2155         unsigned int num_loops, num_dw;
2156         struct amdgpu_job *job;
2157         uint32_t max_bytes;
2158         unsigned int i;
2159         int r;
2160
2161         if (!direct_submit && !ring->sched.ready) {
2162                 DRM_ERROR("Trying to move memory with ring turned off.\n");
2163                 return -EINVAL;
2164         }
2165
2166         max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
2167         num_loops = DIV_ROUND_UP(byte_count, max_bytes);
2168         num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
2169         r = amdgpu_ttm_prepare_job(adev, direct_submit, num_dw,
2170                                    resv, vm_needs_flush, &job, false);
2171         if (r)
2172                 return r;
2173
2174         for (i = 0; i < num_loops; i++) {
2175                 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
2176
2177                 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
2178                                         dst_offset, cur_size_in_bytes, copy_flags);
2179                 src_offset += cur_size_in_bytes;
2180                 dst_offset += cur_size_in_bytes;
2181                 byte_count -= cur_size_in_bytes;
2182         }
2183
2184         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2185         WARN_ON(job->ibs[0].length_dw > num_dw);
2186         if (direct_submit)
2187                 r = amdgpu_job_submit_direct(job, ring, fence);
2188         else
2189                 *fence = amdgpu_job_submit(job);
2190         if (r)
2191                 goto error_free;
2192
2193         return r;
2194
2195 error_free:
2196         amdgpu_job_free(job);
2197         DRM_ERROR("Error scheduling IBs (%d)\n", r);
2198         return r;
2199 }
2200
2201 static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
2202                                uint64_t dst_addr, uint32_t byte_count,
2203                                struct dma_resv *resv,
2204                                struct dma_fence **fence,
2205                                bool vm_needs_flush, bool delayed)
2206 {
2207         struct amdgpu_device *adev = ring->adev;
2208         unsigned int num_loops, num_dw;
2209         struct amdgpu_job *job;
2210         uint32_t max_bytes;
2211         unsigned int i;
2212         int r;
2213
2214         max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
2215         num_loops = DIV_ROUND_UP_ULL(byte_count, max_bytes);
2216         num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->fill_num_dw, 8);
2217         r = amdgpu_ttm_prepare_job(adev, false, num_dw, resv, vm_needs_flush,
2218                                    &job, delayed);
2219         if (r)
2220                 return r;
2221
2222         for (i = 0; i < num_loops; i++) {
2223                 uint32_t cur_size = min(byte_count, max_bytes);
2224
2225                 amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data, dst_addr,
2226                                         cur_size);
2227
2228                 dst_addr += cur_size;
2229                 byte_count -= cur_size;
2230         }
2231
2232         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2233         WARN_ON(job->ibs[0].length_dw > num_dw);
2234         *fence = amdgpu_job_submit(job);
2235         return 0;
2236 }
2237
2238 /**
2239  * amdgpu_ttm_clear_buffer - clear memory buffers
2240  * @bo: amdgpu buffer object
2241  * @resv: reservation object
2242  * @fence: dma_fence associated with the operation
2243  *
2244  * Clear the memory buffer resource.
2245  *
2246  * Returns:
2247  * 0 for success or a negative error code on failure.
2248  */
2249 int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
2250                             struct dma_resv *resv,
2251                             struct dma_fence **fence)
2252 {
2253         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
2254         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
2255         struct amdgpu_res_cursor cursor;
2256         u64 addr;
2257         int r;
2258
2259         if (!adev->mman.buffer_funcs_enabled)
2260                 return -EINVAL;
2261
2262         if (!fence)
2263                 return -EINVAL;
2264
2265         *fence = dma_fence_get_stub();
2266
2267         amdgpu_res_first(bo->tbo.resource, 0, amdgpu_bo_size(bo), &cursor);
2268
2269         mutex_lock(&adev->mman.gtt_window_lock);
2270         while (cursor.remaining) {
2271                 struct dma_fence *next = NULL;
2272                 u64 size;
2273
2274                 if (amdgpu_res_cleared(&cursor)) {
2275                         amdgpu_res_next(&cursor, cursor.size);
2276                         continue;
2277                 }
2278
2279                 /* Never clear more than 256MiB at once to avoid timeouts */
2280                 size = min(cursor.size, 256ULL << 20);
2281
2282                 r = amdgpu_ttm_map_buffer(&bo->tbo, bo->tbo.resource, &cursor,
2283                                           1, ring, false, &size, &addr);
2284                 if (r)
2285                         goto err;
2286
2287                 r = amdgpu_ttm_fill_mem(ring, 0, addr, size, resv,
2288                                         &next, true, true);
2289                 if (r)
2290                         goto err;
2291
2292                 dma_fence_put(*fence);
2293                 *fence = next;
2294
2295                 amdgpu_res_next(&cursor, size);
2296         }
2297 err:
2298         mutex_unlock(&adev->mman.gtt_window_lock);
2299
2300         return r;
2301 }
2302
2303 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
2304                         uint32_t src_data,
2305                         struct dma_resv *resv,
2306                         struct dma_fence **f,
2307                         bool delayed)
2308 {
2309         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
2310         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
2311         struct dma_fence *fence = NULL;
2312         struct amdgpu_res_cursor dst;
2313         int r;
2314
2315         if (!adev->mman.buffer_funcs_enabled) {
2316                 DRM_ERROR("Trying to clear memory with ring turned off.\n");
2317                 return -EINVAL;
2318         }
2319
2320         amdgpu_res_first(bo->tbo.resource, 0, amdgpu_bo_size(bo), &dst);
2321
2322         mutex_lock(&adev->mman.gtt_window_lock);
2323         while (dst.remaining) {
2324                 struct dma_fence *next;
2325                 uint64_t cur_size, to;
2326
2327                 /* Never fill more than 256MiB at once to avoid timeouts */
2328                 cur_size = min(dst.size, 256ULL << 20);
2329
2330                 r = amdgpu_ttm_map_buffer(&bo->tbo, bo->tbo.resource, &dst,
2331                                           1, ring, false, &cur_size, &to);
2332                 if (r)
2333                         goto error;
2334
2335                 r = amdgpu_ttm_fill_mem(ring, src_data, to, cur_size, resv,
2336                                         &next, true, delayed);
2337                 if (r)
2338                         goto error;
2339
2340                 dma_fence_put(fence);
2341                 fence = next;
2342
2343                 amdgpu_res_next(&dst, cur_size);
2344         }
2345 error:
2346         mutex_unlock(&adev->mman.gtt_window_lock);
2347         if (f)
2348                 *f = dma_fence_get(fence);
2349         dma_fence_put(fence);
2350         return r;
2351 }
2352
2353 /**
2354  * amdgpu_ttm_evict_resources - evict memory buffers
2355  * @adev: amdgpu device object
2356  * @mem_type: evicted BO's memory type
2357  *
2358  * Evicts all @mem_type buffers on the lru list of the memory type.
2359  *
2360  * Returns:
2361  * 0 for success or a negative error code on failure.
2362  */
2363 int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type)
2364 {
2365         struct ttm_resource_manager *man;
2366
2367         switch (mem_type) {
2368         case TTM_PL_VRAM:
2369         case TTM_PL_TT:
2370         case AMDGPU_PL_GWS:
2371         case AMDGPU_PL_GDS:
2372         case AMDGPU_PL_OA:
2373                 man = ttm_manager_type(&adev->mman.bdev, mem_type);
2374                 break;
2375         default:
2376                 DRM_ERROR("Trying to evict invalid memory type\n");
2377                 return -EINVAL;
2378         }
2379
2380         return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
2381 }
2382
2383 #if defined(CONFIG_DEBUG_FS)
2384
2385 static int amdgpu_ttm_page_pool_show(struct seq_file *m, void *unused)
2386 {
2387         struct amdgpu_device *adev = m->private;
2388
2389         return ttm_pool_debugfs(&adev->mman.bdev.pool, m);
2390 }
2391
2392 DEFINE_SHOW_ATTRIBUTE(amdgpu_ttm_page_pool);
2393
2394 /*
2395  * amdgpu_ttm_vram_read - Linear read access to VRAM
2396  *
2397  * Accesses VRAM via MMIO for debugging purposes.
2398  */
2399 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
2400                                     size_t size, loff_t *pos)
2401 {
2402         struct amdgpu_device *adev = file_inode(f)->i_private;
2403         ssize_t result = 0;
2404
2405         if (size & 0x3 || *pos & 0x3)
2406                 return -EINVAL;
2407
2408         if (*pos >= adev->gmc.mc_vram_size)
2409                 return -ENXIO;
2410
2411         size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos));
2412         while (size) {
2413                 size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4);
2414                 uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ];
2415
2416                 amdgpu_device_vram_access(adev, *pos, value, bytes, false);
2417                 if (copy_to_user(buf, value, bytes))
2418                         return -EFAULT;
2419
2420                 result += bytes;
2421                 buf += bytes;
2422                 *pos += bytes;
2423                 size -= bytes;
2424         }
2425
2426         return result;
2427 }
2428
2429 /*
2430  * amdgpu_ttm_vram_write - Linear write access to VRAM
2431  *
2432  * Accesses VRAM via MMIO for debugging purposes.
2433  */
2434 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
2435                                     size_t size, loff_t *pos)
2436 {
2437         struct amdgpu_device *adev = file_inode(f)->i_private;
2438         ssize_t result = 0;
2439         int r;
2440
2441         if (size & 0x3 || *pos & 0x3)
2442                 return -EINVAL;
2443
2444         if (*pos >= adev->gmc.mc_vram_size)
2445                 return -ENXIO;
2446
2447         while (size) {
2448                 uint32_t value;
2449
2450                 if (*pos >= adev->gmc.mc_vram_size)
2451                         return result;
2452
2453                 r = get_user(value, (uint32_t *)buf);
2454                 if (r)
2455                         return r;
2456
2457                 amdgpu_device_mm_access(adev, *pos, &value, 4, true);
2458
2459                 result += 4;
2460                 buf += 4;
2461                 *pos += 4;
2462                 size -= 4;
2463         }
2464
2465         return result;
2466 }
2467
2468 static const struct file_operations amdgpu_ttm_vram_fops = {
2469         .owner = THIS_MODULE,
2470         .read = amdgpu_ttm_vram_read,
2471         .write = amdgpu_ttm_vram_write,
2472         .llseek = default_llseek,
2473 };
2474
2475 /*
2476  * amdgpu_iomem_read - Virtual read access to GPU mapped memory
2477  *
2478  * This function is used to read memory that has been mapped to the
2479  * GPU and the known addresses are not physical addresses but instead
2480  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2481  */
2482 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
2483                                  size_t size, loff_t *pos)
2484 {
2485         struct amdgpu_device *adev = file_inode(f)->i_private;
2486         struct iommu_domain *dom;
2487         ssize_t result = 0;
2488         int r;
2489
2490         /* retrieve the IOMMU domain if any for this device */
2491         dom = iommu_get_domain_for_dev(adev->dev);
2492
2493         while (size) {
2494                 phys_addr_t addr = *pos & PAGE_MASK;
2495                 loff_t off = *pos & ~PAGE_MASK;
2496                 size_t bytes = PAGE_SIZE - off;
2497                 unsigned long pfn;
2498                 struct page *p;
2499                 void *ptr;
2500
2501                 bytes = min(bytes, size);
2502
2503                 /* Translate the bus address to a physical address.  If
2504                  * the domain is NULL it means there is no IOMMU active
2505                  * and the address translation is the identity
2506                  */
2507                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2508
2509                 pfn = addr >> PAGE_SHIFT;
2510                 if (!pfn_valid(pfn))
2511                         return -EPERM;
2512
2513                 p = pfn_to_page(pfn);
2514                 if (p->mapping != adev->mman.bdev.dev_mapping)
2515                         return -EPERM;
2516
2517                 ptr = kmap_local_page(p);
2518                 r = copy_to_user(buf, ptr + off, bytes);
2519                 kunmap_local(ptr);
2520                 if (r)
2521                         return -EFAULT;
2522
2523                 size -= bytes;
2524                 *pos += bytes;
2525                 result += bytes;
2526         }
2527
2528         return result;
2529 }
2530
2531 /*
2532  * amdgpu_iomem_write - Virtual write access to GPU mapped memory
2533  *
2534  * This function is used to write memory that has been mapped to the
2535  * GPU and the known addresses are not physical addresses but instead
2536  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2537  */
2538 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
2539                                  size_t size, loff_t *pos)
2540 {
2541         struct amdgpu_device *adev = file_inode(f)->i_private;
2542         struct iommu_domain *dom;
2543         ssize_t result = 0;
2544         int r;
2545
2546         dom = iommu_get_domain_for_dev(adev->dev);
2547
2548         while (size) {
2549                 phys_addr_t addr = *pos & PAGE_MASK;
2550                 loff_t off = *pos & ~PAGE_MASK;
2551                 size_t bytes = PAGE_SIZE - off;
2552                 unsigned long pfn;
2553                 struct page *p;
2554                 void *ptr;
2555
2556                 bytes = min(bytes, size);
2557
2558                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2559
2560                 pfn = addr >> PAGE_SHIFT;
2561                 if (!pfn_valid(pfn))
2562                         return -EPERM;
2563
2564                 p = pfn_to_page(pfn);
2565                 if (p->mapping != adev->mman.bdev.dev_mapping)
2566                         return -EPERM;
2567
2568                 ptr = kmap_local_page(p);
2569                 r = copy_from_user(ptr + off, buf, bytes);
2570                 kunmap_local(ptr);
2571                 if (r)
2572                         return -EFAULT;
2573
2574                 size -= bytes;
2575                 *pos += bytes;
2576                 result += bytes;
2577         }
2578
2579         return result;
2580 }
2581
2582 static const struct file_operations amdgpu_ttm_iomem_fops = {
2583         .owner = THIS_MODULE,
2584         .read = amdgpu_iomem_read,
2585         .write = amdgpu_iomem_write,
2586         .llseek = default_llseek
2587 };
2588
2589 #endif
2590
2591 void amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
2592 {
2593 #if defined(CONFIG_DEBUG_FS)
2594         struct drm_minor *minor = adev_to_drm(adev)->primary;
2595         struct dentry *root = minor->debugfs_root;
2596
2597         debugfs_create_file_size("amdgpu_vram", 0444, root, adev,
2598                                  &amdgpu_ttm_vram_fops, adev->gmc.mc_vram_size);
2599         debugfs_create_file("amdgpu_iomem", 0444, root, adev,
2600                             &amdgpu_ttm_iomem_fops);
2601         debugfs_create_file("ttm_page_pool", 0444, root, adev,
2602                             &amdgpu_ttm_page_pool_fops);
2603         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2604                                                              TTM_PL_VRAM),
2605                                             root, "amdgpu_vram_mm");
2606         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2607                                                              TTM_PL_TT),
2608                                             root, "amdgpu_gtt_mm");
2609         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2610                                                              AMDGPU_PL_GDS),
2611                                             root, "amdgpu_gds_mm");
2612         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2613                                                              AMDGPU_PL_GWS),
2614                                             root, "amdgpu_gws_mm");
2615         ttm_resource_manager_create_debugfs(ttm_manager_type(&adev->mman.bdev,
2616                                                              AMDGPU_PL_OA),
2617                                             root, "amdgpu_oa_mm");
2618
2619 #endif
2620 }