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/swiotlb.h>
  42 #include <linux/dma-buf.h>
  43 #include <linux/sizes.h>
  44
  45 #include <drm/ttm/ttm_bo_api.h>
  46 #include <drm/ttm/ttm_bo_driver.h>
  47 #include <drm/ttm/ttm_placement.h>
  48 #include <drm/ttm/ttm_range_manager.h>
  49
  50 #include <drm/amdgpu_drm.h>
  51
  52 #include "amdgpu.h"
  53 #include "amdgpu_object.h"
  54 #include "amdgpu_trace.h"
  55 #include "amdgpu_amdkfd.h"
  56 #include "amdgpu_sdma.h"
  57 #include "amdgpu_ras.h"
  58 #include "amdgpu_atomfirmware.h"
  59 #include "amdgpu_res_cursor.h"
  60 #include "bif/bif_4_1_d.h"
  61
  62 #define AMDGPU_TTM_VRAM_MAX_DW_READ     (size_t)128
  63
  64 static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
  65                                    struct ttm_tt *ttm,
  66                                    struct ttm_resource *bo_mem);
  67 static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev,
  68                                       struct ttm_tt *ttm);
  69
  70 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
  71                                     unsigned int type,
  72                                     uint64_t size_in_page)
  73 {
  74         return ttm_range_man_init(&adev->mman.bdev, type,
  75                                   false, size_in_page);
  76 }
  77
  78 /**
  79  * amdgpu_evict_flags - Compute placement flags
  80  *
  81  * @bo: The buffer object to evict
  82  * @placement: Possible destination(s) for evicted BO
  83  *
  84  * Fill in placement data when ttm_bo_evict() is called
  85  */
  86 static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
  87                                 struct ttm_placement *placement)
  88 {
  89         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
  90         struct amdgpu_bo *abo;
  91         static const struct ttm_place placements = {
  92                 .fpfn = 0,
  93                 .lpfn = 0,
  94                 .mem_type = TTM_PL_SYSTEM,
  95                 .flags = 0
  96         };
  97
  98         /* Don't handle scatter gather BOs */
  99         if (bo->type == ttm_bo_type_sg) {
 100                 placement->num_placement = 0;
 101                 placement->num_busy_placement = 0;
 102                 return;
 103         }
 104
 105         /* Object isn't an AMDGPU object so ignore */
 106         if (!amdgpu_bo_is_amdgpu_bo(bo)) {
 107                 placement->placement = &placements;
 108                 placement->busy_placement = &placements;
 109                 placement->num_placement = 1;
 110                 placement->num_busy_placement = 1;
 111                 return;
 112         }
 113
 114         abo = ttm_to_amdgpu_bo(bo);
 115         if (abo->flags & AMDGPU_AMDKFD_CREATE_SVM_BO) {
 116                 struct dma_fence *fence;
 117                 struct dma_resv *resv = &bo->base._resv;
 118
 119                 rcu_read_lock();
 120                 fence = rcu_dereference(resv->fence_excl);
 121                 if (fence && !fence->ops->signaled)
 122                         dma_fence_enable_sw_signaling(fence);
 123
 124                 placement->num_placement = 0;
 125                 placement->num_busy_placement = 0;
 126                 rcu_read_unlock();
 127                 return;
 128         }
 129
 130         switch (bo->resource->mem_type) {
 131         case AMDGPU_PL_GDS:
 132         case AMDGPU_PL_GWS:
 133         case AMDGPU_PL_OA:
 134                 placement->num_placement = 0;
 135                 placement->num_busy_placement = 0;
 136                 return;
 137
 138         case TTM_PL_VRAM:
 139                 if (!adev->mman.buffer_funcs_enabled) {
 140                         /* Move to system memory */
 141                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 142                 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 143                            !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 144                            amdgpu_bo_in_cpu_visible_vram(abo)) {
 145
 146                         /* Try evicting to the CPU inaccessible part of VRAM
 147                          * first, but only set GTT as busy placement, so this
 148                          * BO will be evicted to GTT rather than causing other
 149                          * BOs to be evicted from VRAM
 150                          */
 151                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
 152                                                         AMDGPU_GEM_DOMAIN_GTT |
 153                                                         AMDGPU_GEM_DOMAIN_CPU);
 154                         abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 155                         abo->placements[0].lpfn = 0;
 156                         abo->placement.busy_placement = &abo->placements[1];
 157                         abo->placement.num_busy_placement = 1;
 158                 } else {
 159                         /* Move to GTT memory */
 160                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
 161                                                         AMDGPU_GEM_DOMAIN_CPU);
 162                 }
 163                 break;
 164         case TTM_PL_TT:
 165         case AMDGPU_PL_PREEMPT:
 166         default:
 167                 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
 168                 break;
 169         }
 170         *placement = abo->placement;
 171 }
 172
 173 /**
 174  * amdgpu_ttm_map_buffer - Map memory into the GART windows
 175  * @bo: buffer object to map
 176  * @mem: memory object to map
 177  * @mm_cur: range to map
 178  * @num_pages: number of pages to map
 179  * @window: which GART window to use
 180  * @ring: DMA ring to use for the copy
 181  * @tmz: if we should setup a TMZ enabled mapping
 182  * @addr: resulting address inside the MC address space
 183  *
 184  * Setup one of the GART windows to access a specific piece of memory or return
 185  * the physical address for local memory.
 186  */
 187 static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 188                                  struct ttm_resource *mem,
 189                                  struct amdgpu_res_cursor *mm_cur,
 190                                  unsigned num_pages, unsigned window,
 191                                  struct amdgpu_ring *ring, bool tmz,
 192                                  uint64_t *addr)
 193 {
 194         struct amdgpu_device *adev = ring->adev;
 195         struct amdgpu_job *job;
 196         unsigned num_dw, num_bytes;
 197         struct dma_fence *fence;
 198         uint64_t src_addr, dst_addr;
 199         void *cpu_addr;
 200         uint64_t flags;
 201         unsigned int i;
 202         int r;
 203
 204         BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
 205                AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
 206         BUG_ON(mem->mem_type == AMDGPU_PL_PREEMPT);
 207
 208         /* Map only what can't be accessed directly */
 209         if (!tmz && mem->start != AMDGPU_BO_INVALID_OFFSET) {
 210                 *addr = amdgpu_ttm_domain_start(adev, mem->mem_type) +
 211                         mm_cur->start;
 212                 return 0;
 213         }
 214
 215         *addr = adev->gmc.gart_start;
 216         *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
 217                 AMDGPU_GPU_PAGE_SIZE;
 218         *addr += mm_cur->start & ~PAGE_MASK;
 219
 220         num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
 221         num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
 222
 223         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes,
 224                                      AMDGPU_IB_POOL_DELAYED, &job);
 225         if (r)
 226                 return r;
 227
 228         src_addr = num_dw * 4;
 229         src_addr += job->ibs[0].gpu_addr;
 230
 231         dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
 232         dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
 233         amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
 234                                 dst_addr, num_bytes, false);
 235
 236         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
 237         WARN_ON(job->ibs[0].length_dw > num_dw);
 238
 239         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
 240         if (tmz)
 241                 flags |= AMDGPU_PTE_TMZ;
 242
 243         cpu_addr = &job->ibs[0].ptr[num_dw];
 244
 245         if (mem->mem_type == TTM_PL_TT) {
 246                 dma_addr_t *dma_addr;
 247
 248                 dma_addr = &bo->ttm->dma_address[mm_cur->start >> PAGE_SHIFT];
 249                 r = amdgpu_gart_map(adev, 0, num_pages, dma_addr, flags,
 250                                     cpu_addr);
 251                 if (r)
 252                         goto error_free;
 253         } else {
 254                 dma_addr_t dma_address;
 255
 256                 dma_address = mm_cur->start;
 257                 dma_address += adev->vm_manager.vram_base_offset;
 258
 259                 for (i = 0; i < num_pages; ++i) {
 260                         r = amdgpu_gart_map(adev, i << PAGE_SHIFT, 1,
 261                                             &dma_address, flags, cpu_addr);
 262                         if (r)
 263                                 goto error_free;
 264
 265                         dma_address += PAGE_SIZE;
 266                 }
 267         }
 268
 269         r = amdgpu_job_submit(job, &adev->mman.entity,
 270                               AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
 271         if (r)
 272                 goto error_free;
 273
 274         dma_fence_put(fence);
 275
 276         return r;
 277
 278 error_free:
 279         amdgpu_job_free(job);
 280         return r;
 281 }
 282
 283 /**
 284  * amdgpu_ttm_copy_mem_to_mem - Helper function for copy
 285  * @adev: amdgpu device
 286  * @src: buffer/address where to read from
 287  * @dst: buffer/address where to write to
 288  * @size: number of bytes to copy
 289  * @tmz: if a secure copy should be used
 290  * @resv: resv object to sync to
 291  * @f: Returns the last fence if multiple jobs are submitted.
 292  *
 293  * The function copies @size bytes from {src->mem + src->offset} to
 294  * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
 295  * move and different for a BO to BO copy.
 296  *
 297  */
 298 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
 299                                const struct amdgpu_copy_mem *src,
 300                                const struct amdgpu_copy_mem *dst,
 301                                uint64_t size, bool tmz,
 302                                struct dma_resv *resv,
 303                                struct dma_fence **f)
 304 {
 305         const uint32_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
 306                                         AMDGPU_GPU_PAGE_SIZE);
 307
 308         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
 309         struct amdgpu_res_cursor src_mm, dst_mm;
 310         struct dma_fence *fence = NULL;
 311         int r = 0;
 312
 313         if (!adev->mman.buffer_funcs_enabled) {
 314                 DRM_ERROR("Trying to move memory with ring turned off.\n");
 315                 return -EINVAL;
 316         }
 317
 318         amdgpu_res_first(src->mem, src->offset, size, &src_mm);
 319         amdgpu_res_first(dst->mem, dst->offset, size, &dst_mm);
 320
 321         mutex_lock(&adev->mman.gtt_window_lock);
 322         while (src_mm.remaining) {
 323                 uint32_t src_page_offset = src_mm.start & ~PAGE_MASK;
 324                 uint32_t dst_page_offset = dst_mm.start & ~PAGE_MASK;
 325                 struct dma_fence *next;
 326                 uint32_t cur_size;
 327                 uint64_t from, to;
 328
 329                 /* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
 330                  * begins at an offset, then adjust the size accordingly
 331                  */
 332                 cur_size = max(src_page_offset, dst_page_offset);
 333                 cur_size = min(min3(src_mm.size, dst_mm.size, size),
 334                                (uint64_t)(GTT_MAX_BYTES - cur_size));
 335
 336                 /* Map src to window 0 and dst to window 1. */
 337                 r = amdgpu_ttm_map_buffer(src->bo, src->mem, &src_mm,
 338                                           PFN_UP(cur_size + src_page_offset),
 339                                           0, ring, tmz, &from);
 340                 if (r)
 341                         goto error;
 342
 343                 r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, &dst_mm,
 344                                           PFN_UP(cur_size + dst_page_offset),
 345                                           1, ring, tmz, &to);
 346                 if (r)
 347                         goto error;
 348
 349                 r = amdgpu_copy_buffer(ring, from, to, cur_size,
 350                                        resv, &next, false, true, tmz);
 351                 if (r)
 352                         goto error;
 353
 354                 dma_fence_put(fence);
 355                 fence = next;
 356
 357                 amdgpu_res_next(&src_mm, cur_size);
 358                 amdgpu_res_next(&dst_mm, cur_size);
 359         }
 360 error:
 361         mutex_unlock(&adev->mman.gtt_window_lock);
 362         if (f)
 363                 *f = dma_fence_get(fence);
 364         dma_fence_put(fence);
 365         return r;
 366 }
 367
 368 /*
 369  * amdgpu_move_blit - Copy an entire buffer to another buffer
 370  *
 371  * This is a helper called by amdgpu_bo_move() and amdgpu_move_vram_ram() to
 372  * help move buffers to and from VRAM.
 373  */
 374 static int amdgpu_move_blit(struct ttm_buffer_object *bo,
 375                             bool evict,
 376                             struct ttm_resource *new_mem,
 377                             struct ttm_resource *old_mem)
 378 {
 379         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 380         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 381         struct amdgpu_copy_mem src, dst;
 382         struct dma_fence *fence = NULL;
 383         int r;
 384
 385         src.bo = bo;
 386         dst.bo = bo;
 387         src.mem = old_mem;
 388         dst.mem = new_mem;
 389         src.offset = 0;
 390         dst.offset = 0;
 391
 392         r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
 393                                        new_mem->num_pages << PAGE_SHIFT,
 394                                        amdgpu_bo_encrypted(abo),
 395                                        bo->base.resv, &fence);
 396         if (r)
 397                 goto error;
 398
 399         /* clear the space being freed */
 400         if (old_mem->mem_type == TTM_PL_VRAM &&
 401             (abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) {
 402                 struct dma_fence *wipe_fence = NULL;
 403
 404                 r = amdgpu_fill_buffer(ttm_to_amdgpu_bo(bo), AMDGPU_POISON,
 405                                        NULL, &wipe_fence);
 406                 if (r) {
 407                         goto error;
 408                 } else if (wipe_fence) {
 409                         dma_fence_put(fence);
 410                         fence = wipe_fence;
 411                 }
 412         }
 413
 414         /* Always block for VM page tables before committing the new location */
 415         if (bo->type == ttm_bo_type_kernel)
 416                 r = ttm_bo_move_accel_cleanup(bo, fence, true, false, new_mem);
 417         else
 418                 r = ttm_bo_move_accel_cleanup(bo, fence, evict, true, new_mem);
 419         dma_fence_put(fence);
 420         return r;
 421
 422 error:
 423         if (fence)
 424                 dma_fence_wait(fence, false);
 425         dma_fence_put(fence);
 426         return r;
 427 }
 428
 429 /*
 430  * amdgpu_mem_visible - Check that memory can be accessed by ttm_bo_move_memcpy
 431  *
 432  * Called by amdgpu_bo_move()
 433  */
 434 static bool amdgpu_mem_visible(struct amdgpu_device *adev,
 435                                struct ttm_resource *mem)
 436 {
 437         uint64_t mem_size = (u64)mem->num_pages << PAGE_SHIFT;
 438         struct amdgpu_res_cursor cursor;
 439
 440         if (mem->mem_type == TTM_PL_SYSTEM ||
 441             mem->mem_type == TTM_PL_TT)
 442                 return true;
 443         if (mem->mem_type != TTM_PL_VRAM)
 444                 return false;
 445
 446         amdgpu_res_first(mem, 0, mem_size, &cursor);
 447
 448         /* ttm_resource_ioremap only supports contiguous memory */
 449         if (cursor.size != mem_size)
 450                 return false;
 451
 452         return cursor.start + cursor.size <= adev->gmc.visible_vram_size;
 453 }
 454
 455 /*
 456  * amdgpu_bo_move - Move a buffer object to a new memory location
 457  *
 458  * Called by ttm_bo_handle_move_mem()
 459  */
 460 static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
 461                           struct ttm_operation_ctx *ctx,
 462                           struct ttm_resource *new_mem,
 463                           struct ttm_place *hop)
 464 {
 465         struct amdgpu_device *adev;
 466         struct amdgpu_bo *abo;
 467         struct ttm_resource *old_mem = bo->resource;
 468         int r;
 469
 470         if (new_mem->mem_type == TTM_PL_TT ||
 471             new_mem->mem_type == AMDGPU_PL_PREEMPT) {
 472                 r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem);
 473                 if (r)
 474                         return r;
 475         }
 476
 477         /* Can't move a pinned BO */
 478         abo = ttm_to_amdgpu_bo(bo);
 479         if (WARN_ON_ONCE(abo->tbo.pin_count > 0))
 480                 return -EINVAL;
 481
 482         adev = amdgpu_ttm_adev(bo->bdev);
 483
 484         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 485                 ttm_bo_move_null(bo, new_mem);
 486                 goto out;
 487         }
 488         if (old_mem->mem_type == TTM_PL_SYSTEM &&
 489             (new_mem->mem_type == TTM_PL_TT ||
 490              new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
 491                 ttm_bo_move_null(bo, new_mem);
 492                 goto out;
 493         }
 494         if ((old_mem->mem_type == TTM_PL_TT ||
 495              old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
 496             new_mem->mem_type == TTM_PL_SYSTEM) {
 497                 r = ttm_bo_wait_ctx(bo, ctx);
 498                 if (r)
 499                         return r;
 500
 501                 amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm);
 502                 ttm_resource_free(bo, &bo->resource);
 503                 ttm_bo_assign_mem(bo, new_mem);
 504                 goto out;
 505         }
 506
 507         if (old_mem->mem_type == AMDGPU_PL_GDS ||
 508             old_mem->mem_type == AMDGPU_PL_GWS ||
 509             old_mem->mem_type == AMDGPU_PL_OA ||
 510             new_mem->mem_type == AMDGPU_PL_GDS ||
 511             new_mem->mem_type == AMDGPU_PL_GWS ||
 512             new_mem->mem_type == AMDGPU_PL_OA) {
 513                 /* Nothing to save here */
 514                 ttm_bo_move_null(bo, new_mem);
 515                 goto out;
 516         }
 517
 518         if (bo->type == ttm_bo_type_device &&
 519             new_mem->mem_type == TTM_PL_VRAM &&
 520             old_mem->mem_type != TTM_PL_VRAM) {
 521                 /* amdgpu_bo_fault_reserve_notify will re-set this if the CPU
 522                  * accesses the BO after it's moved.
 523                  */
 524                 abo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 525         }
 526
 527         if (adev->mman.buffer_funcs_enabled) {
 528                 if (((old_mem->mem_type == TTM_PL_SYSTEM &&
 529                       new_mem->mem_type == TTM_PL_VRAM) ||
 530                      (old_mem->mem_type == TTM_PL_VRAM &&
 531                       new_mem->mem_type == TTM_PL_SYSTEM))) {
 532                         hop->fpfn = 0;
 533                         hop->lpfn = 0;
 534                         hop->mem_type = TTM_PL_TT;
 535                         hop->flags = TTM_PL_FLAG_TEMPORARY;
 536                         return -EMULTIHOP;
 537                 }
 538
 539                 r = amdgpu_move_blit(bo, evict, new_mem, old_mem);
 540         } else {
 541                 r = -ENODEV;
 542         }
 543
 544         if (r) {
 545                 /* Check that all memory is CPU accessible */
 546                 if (!amdgpu_mem_visible(adev, old_mem) ||
 547                     !amdgpu_mem_visible(adev, new_mem)) {
 548                         pr_err("Move buffer fallback to memcpy unavailable\n");
 549                         return r;
 550                 }
 551
 552                 r = ttm_bo_move_memcpy(bo, ctx, new_mem);
 553                 if (r)
 554                         return r;
 555         }
 556
 557 out:
 558         /* update statistics */
 559         atomic64_add(bo->base.size, &adev->num_bytes_moved);
 560         amdgpu_bo_move_notify(bo, evict, new_mem);
 561         return 0;
 562 }
 563
 564 /*
 565  * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
 566  *
 567  * Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
 568  */
 569 static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
 570                                      struct ttm_resource *mem)
 571 {
 572         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 573         size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
 574
 575         switch (mem->mem_type) {
 576         case TTM_PL_SYSTEM:
 577                 /* system memory */
 578                 return 0;
 579         case TTM_PL_TT:
 580         case AMDGPU_PL_PREEMPT:
 581                 break;
 582         case TTM_PL_VRAM:
 583                 mem->bus.offset = mem->start << PAGE_SHIFT;
 584                 /* check if it's visible */
 585                 if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size)
 586                         return -EINVAL;
 587
 588                 if (adev->mman.aper_base_kaddr &&
 589                     mem->placement & TTM_PL_FLAG_CONTIGUOUS)
 590                         mem->bus.addr = (u8 *)adev->mman.aper_base_kaddr +
 591                                         mem->bus.offset;
 592
 593                 mem->bus.offset += adev->gmc.aper_base;
 594                 mem->bus.is_iomem = true;
 595                 break;
 596         default:
 597                 return -EINVAL;
 598         }
 599         return 0;
 600 }
 601
 602 static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
 603                                            unsigned long page_offset)
 604 {
 605         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 606         struct amdgpu_res_cursor cursor;
 607
 608         amdgpu_res_first(bo->resource, (u64)page_offset << PAGE_SHIFT, 0,
 609                          &cursor);
 610         return (adev->gmc.aper_base + cursor.start) >> PAGE_SHIFT;
 611 }
 612
 613 /**
 614  * amdgpu_ttm_domain_start - Returns GPU start address
 615  * @adev: amdgpu device object
 616  * @type: type of the memory
 617  *
 618  * Returns:
 619  * GPU start address of a memory domain
 620  */
 621
 622 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type)
 623 {
 624         switch (type) {
 625         case TTM_PL_TT:
 626                 return adev->gmc.gart_start;
 627         case TTM_PL_VRAM:
 628                 return adev->gmc.vram_start;
 629         }
 630
 631         return 0;
 632 }
 633
 634 /*
 635  * TTM backend functions.
 636  */
 637 struct amdgpu_ttm_tt {
 638         struct ttm_tt   ttm;
 639         struct drm_gem_object   *gobj;
 640         u64                     offset;
 641         uint64_t                userptr;
 642         struct task_struct      *usertask;
 643         uint32_t                userflags;
 644         bool                    bound;
 645 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
 646         struct hmm_range        *range;
 647 #endif
 648 };
 649
 650 #ifdef CONFIG_DRM_AMDGPU_USERPTR
 651 /*
 652  * amdgpu_ttm_tt_get_user_pages - get device accessible pages that back user
 653  * memory and start HMM tracking CPU page table update
 654  *
 655  * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and only
 656  * once afterwards to stop HMM tracking
 657  */
 658 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages)
 659 {
 660         struct ttm_tt *ttm = bo->tbo.ttm;
 661         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 662         unsigned long start = gtt->userptr;
 663         struct vm_area_struct *vma;
 664         struct mm_struct *mm;
 665         bool readonly;
 666         int r = 0;
 667
 668         mm = bo->notifier.mm;
 669         if (unlikely(!mm)) {
 670                 DRM_DEBUG_DRIVER("BO is not registered?\n");
 671                 return -EFAULT;
 672         }
 673
 674         /* Another get_user_pages is running at the same time?? */
 675         if (WARN_ON(gtt->range))
 676                 return -EFAULT;
 677
 678         if (!mmget_not_zero(mm)) /* Happens during process shutdown */
 679                 return -ESRCH;
 680
 681         mmap_read_lock(mm);
 682         vma = vma_lookup(mm, start);
 683         if (unlikely(!vma)) {
 684                 r = -EFAULT;
 685                 goto out_unlock;
 686         }
 687         if (unlikely((gtt->userflags & AMDGPU_GEM_USERPTR_ANONONLY) &&
 688                 vma->vm_file)) {
 689                 r = -EPERM;
 690                 goto out_unlock;
 691         }
 692
 693         readonly = amdgpu_ttm_tt_is_readonly(ttm);
 694         r = amdgpu_hmm_range_get_pages(&bo->notifier, mm, pages, start,
 695                                        ttm->num_pages, &gtt->range, readonly,
 696                                        true, NULL);
 697 out_unlock:
 698         mmap_read_unlock(mm);
 699         mmput(mm);
 700
 701         return r;
 702 }
 703
 704 /*
 705  * amdgpu_ttm_tt_userptr_range_done - stop HMM track the CPU page table change
 706  * Check if the pages backing this ttm range have been invalidated
 707  *
 708  * Returns: true if pages are still valid
 709  */
 710 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm)
 711 {
 712         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 713         bool r = false;
 714
 715         if (!gtt || !gtt->userptr)
 716                 return false;
 717
 718         DRM_DEBUG_DRIVER("user_pages_done 0x%llx pages 0x%x\n",
 719                 gtt->userptr, ttm->num_pages);
 720
 721         WARN_ONCE(!gtt->range || !gtt->range->hmm_pfns,
 722                 "No user pages to check\n");
 723
 724         if (gtt->range) {
 725                 /*
 726                  * FIXME: Must always hold notifier_lock for this, and must
 727                  * not ignore the return code.
 728                  */
 729                 r = amdgpu_hmm_range_get_pages_done(gtt->range);
 730                 gtt->range = NULL;
 731         }
 732
 733         return !r;
 734 }
 735 #endif
 736
 737 /*
 738  * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as necessary.
 739  *
 740  * Called by amdgpu_cs_list_validate(). This creates the page list
 741  * that backs user memory and will ultimately be mapped into the device
 742  * address space.
 743  */
 744 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
 745 {
 746         unsigned long i;
 747
 748         for (i = 0; i < ttm->num_pages; ++i)
 749                 ttm->pages[i] = pages ? pages[i] : NULL;
 750 }
 751
 752 /*
 753  * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the user pages
 754  *
 755  * Called by amdgpu_ttm_backend_bind()
 756  **/
 757 static int amdgpu_ttm_tt_pin_userptr(struct ttm_device *bdev,
 758                                      struct ttm_tt *ttm)
 759 {
 760         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 761         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 762         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 763         enum dma_data_direction direction = write ?
 764                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 765         int r;
 766
 767         /* Allocate an SG array and squash pages into it */
 768         r = sg_alloc_table_from_pages(ttm->sg, ttm->pages, ttm->num_pages, 0,
 769                                       (u64)ttm->num_pages << PAGE_SHIFT,
 770                                       GFP_KERNEL);
 771         if (r)
 772                 goto release_sg;
 773
 774         /* Map SG to device */
 775         r = dma_map_sgtable(adev->dev, ttm->sg, direction, 0);
 776         if (r)
 777                 goto release_sg;
 778
 779         /* convert SG to linear array of pages and dma addresses */
 780         drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 781                                        ttm->num_pages);
 782
 783         return 0;
 784
 785 release_sg:
 786         kfree(ttm->sg);
 787         ttm->sg = NULL;
 788         return r;
 789 }
 790
 791 /*
 792  * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
 793  */
 794 static void amdgpu_ttm_tt_unpin_userptr(struct ttm_device *bdev,
 795                                         struct ttm_tt *ttm)
 796 {
 797         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 798         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 799         int write = !(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
 800         enum dma_data_direction direction = write ?
 801                 DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
 802
 803         /* double check that we don't free the table twice */
 804         if (!ttm->sg || !ttm->sg->sgl)
 805                 return;
 806
 807         /* unmap the pages mapped to the device */
 808         dma_unmap_sgtable(adev->dev, ttm->sg, direction, 0);
 809         sg_free_table(ttm->sg);
 810
 811 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
 812         if (gtt->range) {
 813                 unsigned long i;
 814
 815                 for (i = 0; i < ttm->num_pages; i++) {
 816                         if (ttm->pages[i] !=
 817                             hmm_pfn_to_page(gtt->range->hmm_pfns[i]))
 818                                 break;
 819                 }
 820
 821                 WARN((i == ttm->num_pages), "Missing get_user_page_done\n");
 822         }
 823 #endif
 824 }
 825
 826 static int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
 827                                 struct ttm_buffer_object *tbo,
 828                                 uint64_t flags)
 829 {
 830         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(tbo);
 831         struct ttm_tt *ttm = tbo->ttm;
 832         struct amdgpu_ttm_tt *gtt = (void *)ttm;
 833         int r;
 834
 835         if (amdgpu_bo_encrypted(abo))
 836                 flags |= AMDGPU_PTE_TMZ;
 837
 838         if (abo->flags & AMDGPU_GEM_CREATE_CP_MQD_GFX9) {
 839                 uint64_t page_idx = 1;
 840
 841                 r = amdgpu_gart_bind(adev, gtt->offset, page_idx,
 842                                 gtt->ttm.dma_address, flags);
 843                 if (r)
 844                         goto gart_bind_fail;
 845
 846                 /* The memory type of the first page defaults to UC. Now
 847                  * modify the memory type to NC from the second page of
 848                  * the BO onward.
 849                  */
 850                 flags &= ~AMDGPU_PTE_MTYPE_VG10_MASK;
 851                 flags |= AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_NC);
 852
 853                 r = amdgpu_gart_bind(adev,
 854                                 gtt->offset + (page_idx << PAGE_SHIFT),
 855                                 ttm->num_pages - page_idx,
 856                                 &(gtt->ttm.dma_address[page_idx]), flags);
 857         } else {
 858                 r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 859                                      gtt->ttm.dma_address, flags);
 860         }
 861
 862 gart_bind_fail:
 863         if (r)
 864                 DRM_ERROR("failed to bind %u pages at 0x%08llX\n",
 865                           ttm->num_pages, gtt->offset);
 866
 867         return r;
 868 }
 869
 870 /*
 871  * amdgpu_ttm_backend_bind - Bind GTT memory
 872  *
 873  * Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
 874  * This handles binding GTT memory to the device address space.
 875  */
 876 static int amdgpu_ttm_backend_bind(struct ttm_device *bdev,
 877                                    struct ttm_tt *ttm,
 878                                    struct ttm_resource *bo_mem)
 879 {
 880         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
 881         struct amdgpu_ttm_tt *gtt = (void*)ttm;
 882         uint64_t flags;
 883         int r = 0;
 884
 885         if (!bo_mem)
 886                 return -EINVAL;
 887
 888         if (gtt->bound)
 889                 return 0;
 890
 891         if (gtt->userptr) {
 892                 r = amdgpu_ttm_tt_pin_userptr(bdev, ttm);
 893                 if (r) {
 894                         DRM_ERROR("failed to pin userptr\n");
 895                         return r;
 896                 }
 897         } else if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL) {
 898                 if (!ttm->sg) {
 899                         struct dma_buf_attachment *attach;
 900                         struct sg_table *sgt;
 901
 902                         attach = gtt->gobj->import_attach;
 903                         sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
 904                         if (IS_ERR(sgt))
 905                                 return PTR_ERR(sgt);
 906
 907                         ttm->sg = sgt;
 908                 }
 909
 910                 drm_prime_sg_to_dma_addr_array(ttm->sg, gtt->ttm.dma_address,
 911                                                ttm->num_pages);
 912         }
 913
 914         if (!ttm->num_pages) {
 915                 WARN(1, "nothing to bind %u pages for mreg %p back %p!\n",
 916                      ttm->num_pages, bo_mem, ttm);
 917         }
 918
 919         if (bo_mem->mem_type == AMDGPU_PL_GDS ||
 920             bo_mem->mem_type == AMDGPU_PL_GWS ||
 921             bo_mem->mem_type == AMDGPU_PL_OA)
 922                 return -EINVAL;
 923
 924         if (bo_mem->mem_type != TTM_PL_TT ||
 925             !amdgpu_gtt_mgr_has_gart_addr(bo_mem)) {
 926                 gtt->offset = AMDGPU_BO_INVALID_OFFSET;
 927                 return 0;
 928         }
 929
 930         /* compute PTE flags relevant to this BO memory */
 931         flags = amdgpu_ttm_tt_pte_flags(adev, ttm, bo_mem);
 932
 933         /* bind pages into GART page tables */
 934         gtt->offset = (u64)bo_mem->start << PAGE_SHIFT;
 935         r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
 936                 gtt->ttm.dma_address, flags);
 937
 938         if (r)
 939                 DRM_ERROR("failed to bind %u pages at 0x%08llX\n",
 940                           ttm->num_pages, gtt->offset);
 941         gtt->bound = true;
 942         return r;
 943 }
 944
 945 /*
 946  * amdgpu_ttm_alloc_gart - Make sure buffer object is accessible either
 947  * through AGP or GART aperture.
 948  *
 949  * If bo is accessible through AGP aperture, then use AGP aperture
 950  * to access bo; otherwise allocate logical space in GART aperture
 951  * and map bo to GART aperture.
 952  */
 953 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
 954 {
 955         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
 956         struct ttm_operation_ctx ctx = { false, false };
 957         struct amdgpu_ttm_tt *gtt = (void *)bo->ttm;
 958         struct ttm_placement placement;
 959         struct ttm_place placements;
 960         struct ttm_resource *tmp;
 961         uint64_t addr, flags;
 962         int r;
 963
 964         if (bo->resource->start != AMDGPU_BO_INVALID_OFFSET)
 965                 return 0;
 966
 967         addr = amdgpu_gmc_agp_addr(bo);
 968         if (addr != AMDGPU_BO_INVALID_OFFSET) {
 969                 bo->resource->start = addr >> PAGE_SHIFT;
 970                 return 0;
 971         }
 972
 973         /* allocate GART space */
 974         placement.num_placement = 1;
 975         placement.placement = &placements;
 976         placement.num_busy_placement = 1;
 977         placement.busy_placement = &placements;
 978         placements.fpfn = 0;
 979         placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
 980         placements.mem_type = TTM_PL_TT;
 981         placements.flags = bo->resource->placement;
 982
 983         r = ttm_bo_mem_space(bo, &placement, &tmp, &ctx);
 984         if (unlikely(r))
 985                 return r;
 986
 987         /* compute PTE flags for this buffer object */
 988         flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, tmp);
 989
 990         /* Bind pages */
 991         gtt->offset = (u64)tmp->start << PAGE_SHIFT;
 992         r = amdgpu_ttm_gart_bind(adev, bo, flags);
 993         if (unlikely(r)) {
 994                 ttm_resource_free(bo, &tmp);
 995                 return r;
 996         }
 997
 998         amdgpu_gart_invalidate_tlb(adev);
 999         ttm_resource_free(bo, &bo->resource);
1000         ttm_bo_assign_mem(bo, tmp);
1001
1002         return 0;
1003 }
1004
1005 /*
1006  * amdgpu_ttm_recover_gart - Rebind GTT pages
1007  *
1008  * Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
1009  * rebind GTT pages during a GPU reset.
1010  */
1011 int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
1012 {
1013         struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
1014         uint64_t flags;
1015         int r;
1016
1017         if (!tbo->ttm)
1018                 return 0;
1019
1020         flags = amdgpu_ttm_tt_pte_flags(adev, tbo->ttm, tbo->resource);
1021         r = amdgpu_ttm_gart_bind(adev, tbo, flags);
1022
1023         return r;
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 = (void *)ttm;
1037         int r;
1038
1039         /* if the pages have userptr pinning then clear that first */
1040         if (gtt->userptr) {
1041                 amdgpu_ttm_tt_unpin_userptr(bdev, ttm);
1042         } else if (ttm->sg && gtt->gobj->import_attach) {
1043                 struct dma_buf_attachment *attach;
1044
1045                 attach = gtt->gobj->import_attach;
1046                 dma_buf_unmap_attachment(attach, ttm->sg, DMA_BIDIRECTIONAL);
1047                 ttm->sg = NULL;
1048         }
1049
1050         if (!gtt->bound)
1051                 return;
1052
1053         if (gtt->offset == AMDGPU_BO_INVALID_OFFSET)
1054                 return;
1055
1056         /* unbind shouldn't be done for GDS/GWS/OA in ttm_bo_clean_mm */
1057         r = amdgpu_gart_unbind(adev, gtt->offset, ttm->num_pages);
1058         if (r)
1059                 DRM_ERROR("failed to unbind %u pages at 0x%08llX\n",
1060                           gtt->ttm.num_pages, gtt->offset);
1061         gtt->bound = false;
1062 }
1063
1064 static void amdgpu_ttm_backend_destroy(struct ttm_device *bdev,
1065                                        struct ttm_tt *ttm)
1066 {
1067         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1068
1069         if (gtt->usertask)
1070                 put_task_struct(gtt->usertask);
1071
1072         ttm_tt_fini(&gtt->ttm);
1073         kfree(gtt);
1074 }
1075
1076 /**
1077  * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
1078  *
1079  * @bo: The buffer object to create a GTT ttm_tt object around
1080  * @page_flags: Page flags to be added to the ttm_tt object
1081  *
1082  * Called by ttm_tt_create().
1083  */
1084 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
1085                                            uint32_t page_flags)
1086 {
1087         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1088         struct amdgpu_ttm_tt *gtt;
1089         enum ttm_caching caching;
1090
1091         gtt = kzalloc(sizeof(struct amdgpu_ttm_tt), GFP_KERNEL);
1092         if (gtt == NULL) {
1093                 return NULL;
1094         }
1095         gtt->gobj = &bo->base;
1096
1097         if (abo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
1098                 caching = ttm_write_combined;
1099         else
1100                 caching = ttm_cached;
1101
1102         /* allocate space for the uninitialized page entries */
1103         if (ttm_sg_tt_init(&gtt->ttm, bo, page_flags, caching)) {
1104                 kfree(gtt);
1105                 return NULL;
1106         }
1107         return &gtt->ttm;
1108 }
1109
1110 /*
1111  * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
1112  *
1113  * Map the pages of a ttm_tt object to an address space visible
1114  * to the underlying device.
1115  */
1116 static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
1117                                   struct ttm_tt *ttm,
1118                                   struct ttm_operation_ctx *ctx)
1119 {
1120         struct amdgpu_device *adev = amdgpu_ttm_adev(bdev);
1121         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1122         pgoff_t i;
1123         int ret;
1124
1125         /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
1126         if (gtt->userptr) {
1127                 ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
1128                 if (!ttm->sg)
1129                         return -ENOMEM;
1130                 return 0;
1131         }
1132
1133         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1134                 return 0;
1135
1136         ret = ttm_pool_alloc(&adev->mman.bdev.pool, ttm, ctx);
1137         if (ret)
1138                 return ret;
1139
1140         for (i = 0; i < ttm->num_pages; ++i)
1141                 ttm->pages[i]->mapping = bdev->dev_mapping;
1142
1143         return 0;
1144 }
1145
1146 /*
1147  * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
1148  *
1149  * Unmaps pages of a ttm_tt object from the device address space and
1150  * unpopulates the page array backing it.
1151  */
1152 static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev,
1153                                      struct ttm_tt *ttm)
1154 {
1155         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1156         struct amdgpu_device *adev;
1157         pgoff_t i;
1158
1159         amdgpu_ttm_backend_unbind(bdev, ttm);
1160
1161         if (gtt->userptr) {
1162                 amdgpu_ttm_tt_set_user_pages(ttm, NULL);
1163                 kfree(ttm->sg);
1164                 ttm->sg = NULL;
1165                 return;
1166         }
1167
1168         if (ttm->page_flags & TTM_TT_FLAG_EXTERNAL)
1169                 return;
1170
1171         for (i = 0; i < ttm->num_pages; ++i)
1172                 ttm->pages[i]->mapping = NULL;
1173
1174         adev = amdgpu_ttm_adev(bdev);
1175         return ttm_pool_free(&adev->mman.bdev.pool, ttm);
1176 }
1177
1178 /**
1179  * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt for the current
1180  * task
1181  *
1182  * @bo: The ttm_buffer_object to bind this userptr to
1183  * @addr:  The address in the current tasks VM space to use
1184  * @flags: Requirements of userptr object.
1185  *
1186  * Called by amdgpu_gem_userptr_ioctl() to bind userptr pages
1187  * to current task
1188  */
1189 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
1190                               uint64_t addr, uint32_t flags)
1191 {
1192         struct amdgpu_ttm_tt *gtt;
1193
1194         if (!bo->ttm) {
1195                 /* TODO: We want a separate TTM object type for userptrs */
1196                 bo->ttm = amdgpu_ttm_tt_create(bo, 0);
1197                 if (bo->ttm == NULL)
1198                         return -ENOMEM;
1199         }
1200
1201         /* Set TTM_TT_FLAG_EXTERNAL before populate but after create. */
1202         bo->ttm->page_flags |= TTM_TT_FLAG_EXTERNAL;
1203
1204         gtt = (void *)bo->ttm;
1205         gtt->userptr = addr;
1206         gtt->userflags = flags;
1207
1208         if (gtt->usertask)
1209                 put_task_struct(gtt->usertask);
1210         gtt->usertask = current->group_leader;
1211         get_task_struct(gtt->usertask);
1212
1213         return 0;
1214 }
1215
1216 /*
1217  * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
1218  */
1219 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
1220 {
1221         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1222
1223         if (gtt == NULL)
1224                 return NULL;
1225
1226         if (gtt->usertask == NULL)
1227                 return NULL;
1228
1229         return gtt->usertask->mm;
1230 }
1231
1232 /*
1233  * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays inside an
1234  * address range for the current task.
1235  *
1236  */
1237 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
1238                                   unsigned long end)
1239 {
1240         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1241         unsigned long size;
1242
1243         if (gtt == NULL || !gtt->userptr)
1244                 return false;
1245
1246         /* Return false if no part of the ttm_tt object lies within
1247          * the range
1248          */
1249         size = (unsigned long)gtt->ttm.num_pages * PAGE_SIZE;
1250         if (gtt->userptr > end || gtt->userptr + size <= start)
1251                 return false;
1252
1253         return true;
1254 }
1255
1256 /*
1257  * amdgpu_ttm_tt_is_userptr - Have the pages backing by userptr?
1258  */
1259 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm)
1260 {
1261         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1262
1263         if (gtt == NULL || !gtt->userptr)
1264                 return false;
1265
1266         return true;
1267 }
1268
1269 /*
1270  * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
1271  */
1272 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
1273 {
1274         struct amdgpu_ttm_tt *gtt = (void *)ttm;
1275
1276         if (gtt == NULL)
1277                 return false;
1278
1279         return !!(gtt->userflags & AMDGPU_GEM_USERPTR_READONLY);
1280 }
1281
1282 /**
1283  * amdgpu_ttm_tt_pde_flags - Compute PDE flags for ttm_tt object
1284  *
1285  * @ttm: The ttm_tt object to compute the flags for
1286  * @mem: The memory registry backing this ttm_tt object
1287  *
1288  * Figure out the flags to use for a VM PDE (Page Directory Entry).
1289  */
1290 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem)
1291 {
1292         uint64_t flags = 0;
1293
1294         if (mem && mem->mem_type != TTM_PL_SYSTEM)
1295                 flags |= AMDGPU_PTE_VALID;
1296
1297         if (mem && (mem->mem_type == TTM_PL_TT ||
1298                     mem->mem_type == AMDGPU_PL_PREEMPT)) {
1299                 flags |= AMDGPU_PTE_SYSTEM;
1300
1301                 if (ttm->caching == ttm_cached)
1302                         flags |= AMDGPU_PTE_SNOOPED;
1303         }
1304
1305         if (mem && mem->mem_type == TTM_PL_VRAM &&
1306                         mem->bus.caching == ttm_cached)
1307                 flags |= AMDGPU_PTE_SNOOPED;
1308
1309         return flags;
1310 }
1311
1312 /**
1313  * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
1314  *
1315  * @adev: amdgpu_device pointer
1316  * @ttm: The ttm_tt object to compute the flags for
1317  * @mem: The memory registry backing this ttm_tt object
1318  *
1319  * Figure out the flags to use for a VM PTE (Page Table Entry).
1320  */
1321 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
1322                                  struct ttm_resource *mem)
1323 {
1324         uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
1325
1326         flags |= adev->gart.gart_pte_flags;
1327         flags |= AMDGPU_PTE_READABLE;
1328
1329         if (!amdgpu_ttm_tt_is_readonly(ttm))
1330                 flags |= AMDGPU_PTE_WRITEABLE;
1331
1332         return flags;
1333 }
1334
1335 /*
1336  * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict a buffer
1337  * object.
1338  *
1339  * Return true if eviction is sensible. Called by ttm_mem_evict_first() on
1340  * behalf of ttm_bo_mem_force_space() which tries to evict buffer objects until
1341  * it can find space for a new object and by ttm_bo_force_list_clean() which is
1342  * used to clean out a memory space.
1343  */
1344 static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
1345                                             const struct ttm_place *place)
1346 {
1347         unsigned long num_pages = bo->resource->num_pages;
1348         struct amdgpu_res_cursor cursor;
1349         struct dma_resv_list *flist;
1350         struct dma_fence *f;
1351         int i;
1352
1353         /* Swapout? */
1354         if (bo->resource->mem_type == TTM_PL_SYSTEM)
1355                 return true;
1356
1357         if (bo->type == ttm_bo_type_kernel &&
1358             !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
1359                 return false;
1360
1361         /* If bo is a KFD BO, check if the bo belongs to the current process.
1362          * If true, then return false as any KFD process needs all its BOs to
1363          * be resident to run successfully
1364          */
1365         flist = dma_resv_shared_list(bo->base.resv);
1366         if (flist) {
1367                 for (i = 0; i < flist->shared_count; ++i) {
1368                         f = rcu_dereference_protected(flist->shared[i],
1369                                 dma_resv_held(bo->base.resv));
1370                         if (amdkfd_fence_check_mm(f, current->mm))
1371                                 return false;
1372                 }
1373         }
1374
1375         switch (bo->resource->mem_type) {
1376         case AMDGPU_PL_PREEMPT:
1377                 /* Preemptible BOs don't own system resources managed by the
1378                  * driver (pages, VRAM, GART space). They point to resources
1379                  * owned by someone else (e.g. pageable memory in user mode
1380                  * or a DMABuf). They are used in a preemptible context so we
1381                  * can guarantee no deadlocks and good QoS in case of MMU
1382                  * notifiers or DMABuf move notifiers from the resource owner.
1383                  */
1384                 return false;
1385         case TTM_PL_TT:
1386                 if (amdgpu_bo_is_amdgpu_bo(bo) &&
1387                     amdgpu_bo_encrypted(ttm_to_amdgpu_bo(bo)))
1388                         return false;
1389                 return true;
1390
1391         case TTM_PL_VRAM:
1392                 /* Check each drm MM node individually */
1393                 amdgpu_res_first(bo->resource, 0, (u64)num_pages << PAGE_SHIFT,
1394                                  &cursor);
1395                 while (cursor.remaining) {
1396                         if (place->fpfn < PFN_DOWN(cursor.start + cursor.size)
1397                             && !(place->lpfn &&
1398                                  place->lpfn <= PFN_DOWN(cursor.start)))
1399                                 return true;
1400
1401                         amdgpu_res_next(&cursor, cursor.size);
1402                 }
1403                 return false;
1404
1405         default:
1406                 break;
1407         }
1408
1409         return ttm_bo_eviction_valuable(bo, place);
1410 }
1411
1412 static void amdgpu_ttm_vram_mm_access(struct amdgpu_device *adev, loff_t pos,
1413                                       void *buf, size_t size, bool write)
1414 {
1415         while (size) {
1416                 uint64_t aligned_pos = ALIGN_DOWN(pos, 4);
1417                 uint64_t bytes = 4 - (pos & 0x3);
1418                 uint32_t shift = (pos & 0x3) * 8;
1419                 uint32_t mask = 0xffffffff << shift;
1420                 uint32_t value = 0;
1421
1422                 if (size < bytes) {
1423                         mask &= 0xffffffff >> (bytes - size) * 8;
1424                         bytes = size;
1425                 }
1426
1427                 if (mask != 0xffffffff) {
1428                         amdgpu_device_mm_access(adev, aligned_pos, &value, 4, false);
1429                         if (write) {
1430                                 value &= ~mask;
1431                                 value |= (*(uint32_t *)buf << shift) & mask;
1432                                 amdgpu_device_mm_access(adev, aligned_pos, &value, 4, true);
1433                         } else {
1434                                 value = (value & mask) >> shift;
1435                                 memcpy(buf, &value, bytes);
1436                         }
1437                 } else {
1438                         amdgpu_device_mm_access(adev, aligned_pos, buf, 4, write);
1439                 }
1440
1441                 pos += bytes;
1442                 buf += bytes;
1443                 size -= bytes;
1444         }
1445 }
1446
1447 /**
1448  * amdgpu_ttm_access_memory - Read or Write memory that backs a buffer object.
1449  *
1450  * @bo:  The buffer object to read/write
1451  * @offset:  Offset into buffer object
1452  * @buf:  Secondary buffer to write/read from
1453  * @len: Length in bytes of access
1454  * @write:  true if writing
1455  *
1456  * This is used to access VRAM that backs a buffer object via MMIO
1457  * access for debugging purposes.
1458  */
1459 static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
1460                                     unsigned long offset, void *buf, int len,
1461                                     int write)
1462 {
1463         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1464         struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
1465         struct amdgpu_res_cursor cursor;
1466         int ret = 0;
1467
1468         if (bo->resource->mem_type != TTM_PL_VRAM)
1469                 return -EIO;
1470
1471         amdgpu_res_first(bo->resource, offset, len, &cursor);
1472         while (cursor.remaining) {
1473                 size_t count, size = cursor.size;
1474                 loff_t pos = cursor.start;
1475
1476                 count = amdgpu_device_aper_access(adev, pos, buf, size, write);
1477                 size -= count;
1478                 if (size) {
1479                         /* using MM to access rest vram and handle un-aligned address */
1480                         pos += count;
1481                         buf += count;
1482                         amdgpu_ttm_vram_mm_access(adev, pos, buf, size, write);
1483                 }
1484
1485                 ret += cursor.size;
1486                 buf += cursor.size;
1487                 amdgpu_res_next(&cursor, cursor.size);
1488         }
1489
1490         return ret;
1491 }
1492
1493 static void
1494 amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo)
1495 {
1496         amdgpu_bo_move_notify(bo, false, NULL);
1497 }
1498
1499 static struct ttm_device_funcs amdgpu_bo_driver = {
1500         .ttm_tt_create = &amdgpu_ttm_tt_create,
1501         .ttm_tt_populate = &amdgpu_ttm_tt_populate,
1502         .ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
1503         .ttm_tt_destroy = &amdgpu_ttm_backend_destroy,
1504         .eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
1505         .evict_flags = &amdgpu_evict_flags,
1506         .move = &amdgpu_bo_move,
1507         .delete_mem_notify = &amdgpu_bo_delete_mem_notify,
1508         .release_notify = &amdgpu_bo_release_notify,
1509         .io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
1510         .io_mem_pfn = amdgpu_ttm_io_mem_pfn,
1511         .access_memory = &amdgpu_ttm_access_memory,
1512         .del_from_lru_notify = &amdgpu_vm_del_from_lru_notify
1513 };
1514
1515 /*
1516  * Firmware Reservation functions
1517  */
1518 /**
1519  * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
1520  *
1521  * @adev: amdgpu_device pointer
1522  *
1523  * free fw reserved vram if it has been reserved.
1524  */
1525 static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
1526 {
1527         amdgpu_bo_free_kernel(&adev->mman.fw_vram_usage_reserved_bo,
1528                 NULL, &adev->mman.fw_vram_usage_va);
1529 }
1530
1531 /**
1532  * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
1533  *
1534  * @adev: amdgpu_device pointer
1535  *
1536  * create bo vram reservation from fw.
1537  */
1538 static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
1539 {
1540         uint64_t vram_size = adev->gmc.visible_vram_size;
1541
1542         adev->mman.fw_vram_usage_va = NULL;
1543         adev->mman.fw_vram_usage_reserved_bo = NULL;
1544
1545         if (adev->mman.fw_vram_usage_size == 0 ||
1546             adev->mman.fw_vram_usage_size > vram_size)
1547                 return 0;
1548
1549         return amdgpu_bo_create_kernel_at(adev,
1550                                           adev->mman.fw_vram_usage_start_offset,
1551                                           adev->mman.fw_vram_usage_size,
1552                                           AMDGPU_GEM_DOMAIN_VRAM,
1553                                           &adev->mman.fw_vram_usage_reserved_bo,
1554                                           &adev->mman.fw_vram_usage_va);
1555 }
1556
1557 /*
1558  * Memoy training reservation functions
1559  */
1560
1561 /**
1562  * amdgpu_ttm_training_reserve_vram_fini - free memory training reserved vram
1563  *
1564  * @adev: amdgpu_device pointer
1565  *
1566  * free memory training reserved vram if it has been reserved.
1567  */
1568 static int amdgpu_ttm_training_reserve_vram_fini(struct amdgpu_device *adev)
1569 {
1570         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1571
1572         ctx->init = PSP_MEM_TRAIN_NOT_SUPPORT;
1573         amdgpu_bo_free_kernel(&ctx->c2p_bo, NULL, NULL);
1574         ctx->c2p_bo = NULL;
1575
1576         return 0;
1577 }
1578
1579 static void amdgpu_ttm_training_data_block_init(struct amdgpu_device *adev)
1580 {
1581         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1582
1583         memset(ctx, 0, sizeof(*ctx));
1584
1585         ctx->c2p_train_data_offset =
1586                 ALIGN((adev->gmc.mc_vram_size - adev->mman.discovery_tmr_size - SZ_1M), SZ_1M);
1587         ctx->p2c_train_data_offset =
1588                 (adev->gmc.mc_vram_size - GDDR6_MEM_TRAINING_OFFSET);
1589         ctx->train_data_size =
1590                 GDDR6_MEM_TRAINING_DATA_SIZE_IN_BYTES;
1591
1592         DRM_DEBUG("train_data_size:%llx,p2c_train_data_offset:%llx,c2p_train_data_offset:%llx.\n",
1593                         ctx->train_data_size,
1594                         ctx->p2c_train_data_offset,
1595                         ctx->c2p_train_data_offset);
1596 }
1597
1598 /*
1599  * reserve TMR memory at the top of VRAM which holds
1600  * IP Discovery data and is protected by PSP.
1601  */
1602 static int amdgpu_ttm_reserve_tmr(struct amdgpu_device *adev)
1603 {
1604         int ret;
1605         struct psp_memory_training_context *ctx = &adev->psp.mem_train_ctx;
1606         bool mem_train_support = false;
1607
1608         if (!amdgpu_sriov_vf(adev)) {
1609                 if (amdgpu_atomfirmware_mem_training_supported(adev))
1610                         mem_train_support = true;
1611                 else
1612                         DRM_DEBUG("memory training does not support!\n");
1613         }
1614
1615         /*
1616          * Query reserved tmr size through atom firmwareinfo for Sienna_Cichlid and onwards for all
1617          * the use cases (IP discovery/G6 memory training/profiling/diagnostic data.etc)
1618          *
1619          * Otherwise, fallback to legacy approach to check and reserve tmr block for ip
1620          * discovery data and G6 memory training data respectively
1621          */
1622         adev->mman.discovery_tmr_size =
1623                 amdgpu_atomfirmware_get_fw_reserved_fb_size(adev);
1624         if (!adev->mman.discovery_tmr_size)
1625                 adev->mman.discovery_tmr_size = DISCOVERY_TMR_OFFSET;
1626
1627         if (mem_train_support) {
1628                 /* reserve vram for mem train according to TMR location */
1629                 amdgpu_ttm_training_data_block_init(adev);
1630                 ret = amdgpu_bo_create_kernel_at(adev,
1631                                          ctx->c2p_train_data_offset,
1632                                          ctx->train_data_size,
1633                                          AMDGPU_GEM_DOMAIN_VRAM,
1634                                          &ctx->c2p_bo,
1635                                          NULL);
1636                 if (ret) {
1637                         DRM_ERROR("alloc c2p_bo failed(%d)!\n", ret);
1638                         amdgpu_ttm_training_reserve_vram_fini(adev);
1639                         return ret;
1640                 }
1641                 ctx->init = PSP_MEM_TRAIN_RESERVE_SUCCESS;
1642         }
1643
1644         ret = amdgpu_bo_create_kernel_at(adev,
1645                                 adev->gmc.real_vram_size - adev->mman.discovery_tmr_size,
1646                                 adev->mman.discovery_tmr_size,
1647                                 AMDGPU_GEM_DOMAIN_VRAM,
1648                                 &adev->mman.discovery_memory,
1649                                 NULL);
1650         if (ret) {
1651                 DRM_ERROR("alloc tmr failed(%d)!\n", ret);
1652                 amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL);
1653                 return ret;
1654         }
1655
1656         return 0;
1657 }
1658
1659 /*
1660  * amdgpu_ttm_init - Init the memory management (ttm) as well as various
1661  * gtt/vram related fields.
1662  *
1663  * This initializes all of the memory space pools that the TTM layer
1664  * will need such as the GTT space (system memory mapped to the device),
1665  * VRAM (on-board memory), and on-chip memories (GDS, GWS, OA) which
1666  * can be mapped per VMID.
1667  */
1668 int amdgpu_ttm_init(struct amdgpu_device *adev)
1669 {
1670         uint64_t gtt_size;
1671         int r;
1672         u64 vis_vram_limit;
1673
1674         mutex_init(&adev->mman.gtt_window_lock);
1675
1676         /* No others user of address space so set it to 0 */
1677         r = ttm_device_init(&adev->mman.bdev, &amdgpu_bo_driver, adev->dev,
1678                                adev_to_drm(adev)->anon_inode->i_mapping,
1679                                adev_to_drm(adev)->vma_offset_manager,
1680                                adev->need_swiotlb,
1681                                dma_addressing_limited(adev->dev));
1682         if (r) {
1683                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
1684                 return r;
1685         }
1686         adev->mman.initialized = true;
1687
1688         /* Initialize VRAM pool with all of VRAM divided into pages */
1689         r = amdgpu_vram_mgr_init(adev);
1690         if (r) {
1691                 DRM_ERROR("Failed initializing VRAM heap.\n");
1692                 return r;
1693         }
1694
1695         /* Reduce size of CPU-visible VRAM if requested */
1696         vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024;
1697         if (amdgpu_vis_vram_limit > 0 &&
1698             vis_vram_limit <= adev->gmc.visible_vram_size)
1699                 adev->gmc.visible_vram_size = vis_vram_limit;
1700
1701         /* Change the size here instead of the init above so only lpfn is affected */
1702         amdgpu_ttm_set_buffer_funcs_status(adev, false);
1703 #ifdef CONFIG_64BIT
1704 #ifdef CONFIG_X86
1705         if (adev->gmc.xgmi.connected_to_cpu)
1706                 adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base,
1707                                 adev->gmc.visible_vram_size);
1708
1709         else
1710 #endif
1711                 adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
1712                                 adev->gmc.visible_vram_size);
1713 #endif
1714
1715         /*
1716          *The reserved vram for firmware must be pinned to the specified
1717          *place on the VRAM, so reserve it early.
1718          */
1719         r = amdgpu_ttm_fw_reserve_vram_init(adev);
1720         if (r) {
1721                 return r;
1722         }
1723
1724         /*
1725          * only NAVI10 and onwards ASIC support for IP discovery.
1726          * If IP discovery enabled, a block of memory should be
1727          * reserved for IP discovey.
1728          */
1729         if (adev->mman.discovery_bin) {
1730                 r = amdgpu_ttm_reserve_tmr(adev);
1731                 if (r)
1732                         return r;
1733         }
1734
1735         /* allocate memory as required for VGA
1736          * This is used for VGA emulation and pre-OS scanout buffers to
1737          * avoid display artifacts while transitioning between pre-OS
1738          * and driver.  */
1739         r = amdgpu_bo_create_kernel_at(adev, 0, adev->mman.stolen_vga_size,
1740                                        AMDGPU_GEM_DOMAIN_VRAM,
1741                                        &adev->mman.stolen_vga_memory,
1742                                        NULL);
1743         if (r)
1744                 return r;
1745         r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_vga_size,
1746                                        adev->mman.stolen_extended_size,
1747                                        AMDGPU_GEM_DOMAIN_VRAM,
1748                                        &adev->mman.stolen_extended_memory,
1749                                        NULL);
1750         if (r)
1751                 return r;
1752         r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_reserved_offset,
1753                                        adev->mman.stolen_reserved_size,
1754                                        AMDGPU_GEM_DOMAIN_VRAM,
1755                                        &adev->mman.stolen_reserved_memory,
1756                                        NULL);
1757         if (r)
1758                 return r;
1759
1760         DRM_INFO("amdgpu: %uM of VRAM memory ready\n",
1761                  (unsigned) (adev->gmc.real_vram_size / (1024 * 1024)));
1762
1763         /* Compute GTT size, either bsaed on 3/4th the size of RAM size
1764          * or whatever the user passed on module init */
1765         if (amdgpu_gtt_size == -1) {
1766                 struct sysinfo si;
1767
1768                 si_meminfo(&si);
1769                 gtt_size = min(max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
1770                                adev->gmc.mc_vram_size),
1771                                ((uint64_t)si.totalram * si.mem_unit * 3/4));
1772         }
1773         else
1774                 gtt_size = (uint64_t)amdgpu_gtt_size << 20;
1775
1776         /* Initialize GTT memory pool */
1777         r = amdgpu_gtt_mgr_init(adev, gtt_size);
1778         if (r) {
1779                 DRM_ERROR("Failed initializing GTT heap.\n");
1780                 return r;
1781         }
1782         DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
1783                  (unsigned)(gtt_size / (1024 * 1024)));
1784
1785         /* Initialize preemptible memory pool */
1786         r = amdgpu_preempt_mgr_init(adev);
1787         if (r) {
1788                 DRM_ERROR("Failed initializing PREEMPT heap.\n");
1789                 return r;
1790         }
1791
1792         /* Initialize various on-chip memory pools */
1793         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GDS, adev->gds.gds_size);
1794         if (r) {
1795                 DRM_ERROR("Failed initializing GDS heap.\n");
1796                 return r;
1797         }
1798
1799         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_GWS, adev->gds.gws_size);
1800         if (r) {
1801                 DRM_ERROR("Failed initializing gws heap.\n");
1802                 return r;
1803         }
1804
1805         r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_OA, adev->gds.oa_size);
1806         if (r) {
1807                 DRM_ERROR("Failed initializing oa heap.\n");
1808                 return r;
1809         }
1810
1811         return 0;
1812 }
1813
1814 /*
1815  * amdgpu_ttm_fini - De-initialize the TTM memory pools
1816  */
1817 void amdgpu_ttm_fini(struct amdgpu_device *adev)
1818 {
1819         if (!adev->mman.initialized)
1820                 return;
1821
1822         amdgpu_ttm_training_reserve_vram_fini(adev);
1823         /* return the stolen vga memory back to VRAM */
1824         amdgpu_bo_free_kernel(&adev->mman.stolen_vga_memory, NULL, NULL);
1825         amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL);
1826         /* return the IP Discovery TMR memory back to VRAM */
1827         amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL);
1828         if (adev->mman.stolen_reserved_size)
1829                 amdgpu_bo_free_kernel(&adev->mman.stolen_reserved_memory,
1830                                       NULL, NULL);
1831         amdgpu_ttm_fw_reserve_vram_fini(adev);
1832
1833         amdgpu_vram_mgr_fini(adev);
1834         amdgpu_gtt_mgr_fini(adev);
1835         amdgpu_preempt_mgr_fini(adev);
1836         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GDS);
1837         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_GWS);
1838         ttm_range_man_fini(&adev->mman.bdev, AMDGPU_PL_OA);
1839         ttm_device_fini(&adev->mman.bdev);
1840         adev->mman.initialized = false;
1841         DRM_INFO("amdgpu: ttm finalized\n");
1842 }
1843
1844 /**
1845  * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
1846  *
1847  * @adev: amdgpu_device pointer
1848  * @enable: true when we can use buffer functions.
1849  *
1850  * Enable/disable use of buffer functions during suspend/resume. This should
1851  * only be called at bootup or when userspace isn't running.
1852  */
1853 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
1854 {
1855         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
1856         uint64_t size;
1857         int r;
1858
1859         if (!adev->mman.initialized || amdgpu_in_reset(adev) ||
1860             adev->mman.buffer_funcs_enabled == enable)
1861                 return;
1862
1863         if (enable) {
1864                 struct amdgpu_ring *ring;
1865                 struct drm_gpu_scheduler *sched;
1866
1867                 ring = adev->mman.buffer_funcs_ring;
1868                 sched = &ring->sched;
1869                 r = drm_sched_entity_init(&adev->mman.entity,
1870                                           DRM_SCHED_PRIORITY_KERNEL, &sched,
1871                                           1, NULL);
1872                 if (r) {
1873                         DRM_ERROR("Failed setting up TTM BO move entity (%d)\n",
1874                                   r);
1875                         return;
1876                 }
1877         } else {
1878                 drm_sched_entity_destroy(&adev->mman.entity);
1879                 dma_fence_put(man->move);
1880                 man->move = NULL;
1881         }
1882
1883         /* this just adjusts TTM size idea, which sets lpfn to the correct value */
1884         if (enable)
1885                 size = adev->gmc.real_vram_size;
1886         else
1887                 size = adev->gmc.visible_vram_size;
1888         man->size = size >> PAGE_SHIFT;
1889         adev->mman.buffer_funcs_enabled = enable;
1890 }
1891
1892 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
1893                        uint64_t dst_offset, uint32_t byte_count,
1894                        struct dma_resv *resv,
1895                        struct dma_fence **fence, bool direct_submit,
1896                        bool vm_needs_flush, bool tmz)
1897 {
1898         enum amdgpu_ib_pool_type pool = direct_submit ? AMDGPU_IB_POOL_DIRECT :
1899                 AMDGPU_IB_POOL_DELAYED;
1900         struct amdgpu_device *adev = ring->adev;
1901         struct amdgpu_job *job;
1902
1903         uint32_t max_bytes;
1904         unsigned num_loops, num_dw;
1905         unsigned i;
1906         int r;
1907
1908         if (direct_submit && !ring->sched.ready) {
1909                 DRM_ERROR("Trying to move memory with ring turned off.\n");
1910                 return -EINVAL;
1911         }
1912
1913         max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
1914         num_loops = DIV_ROUND_UP(byte_count, max_bytes);
1915         num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
1916
1917         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, pool, &job);
1918         if (r)
1919                 return r;
1920
1921         if (vm_needs_flush) {
1922                 job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gmc.pdb0_bo ?
1923                                         adev->gmc.pdb0_bo : adev->gart.bo);
1924                 job->vm_needs_flush = true;
1925         }
1926         if (resv) {
1927                 r = amdgpu_sync_resv(adev, &job->sync, resv,
1928                                      AMDGPU_SYNC_ALWAYS,
1929                                      AMDGPU_FENCE_OWNER_UNDEFINED);
1930                 if (r) {
1931                         DRM_ERROR("sync failed (%d).\n", r);
1932                         goto error_free;
1933                 }
1934         }
1935
1936         for (i = 0; i < num_loops; i++) {
1937                 uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
1938
1939                 amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_offset,
1940                                         dst_offset, cur_size_in_bytes, tmz);
1941
1942                 src_offset += cur_size_in_bytes;
1943                 dst_offset += cur_size_in_bytes;
1944                 byte_count -= cur_size_in_bytes;
1945         }
1946
1947         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
1948         WARN_ON(job->ibs[0].length_dw > num_dw);
1949         if (direct_submit)
1950                 r = amdgpu_job_submit_direct(job, ring, fence);
1951         else
1952                 r = amdgpu_job_submit(job, &adev->mman.entity,
1953                                       AMDGPU_FENCE_OWNER_UNDEFINED, fence);
1954         if (r)
1955                 goto error_free;
1956
1957         return r;
1958
1959 error_free:
1960         amdgpu_job_free(job);
1961         DRM_ERROR("Error scheduling IBs (%d)\n", r);
1962         return r;
1963 }
1964
1965 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
1966                        uint32_t src_data,
1967                        struct dma_resv *resv,
1968                        struct dma_fence **fence)
1969 {
1970         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1971         uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
1972         struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
1973
1974         struct amdgpu_res_cursor cursor;
1975         unsigned int num_loops, num_dw;
1976         uint64_t num_bytes;
1977
1978         struct amdgpu_job *job;
1979         int r;
1980
1981         if (!adev->mman.buffer_funcs_enabled) {
1982                 DRM_ERROR("Trying to clear memory with ring turned off.\n");
1983                 return -EINVAL;
1984         }
1985
1986         if (bo->tbo.resource->mem_type == AMDGPU_PL_PREEMPT) {
1987                 DRM_ERROR("Trying to clear preemptible memory.\n");
1988                 return -EINVAL;
1989         }
1990
1991         if (bo->tbo.resource->mem_type == TTM_PL_TT) {
1992                 r = amdgpu_ttm_alloc_gart(&bo->tbo);
1993                 if (r)
1994                         return r;
1995         }
1996
1997         num_bytes = bo->tbo.resource->num_pages << PAGE_SHIFT;
1998         num_loops = 0;
1999
2000         amdgpu_res_first(bo->tbo.resource, 0, num_bytes, &cursor);
2001         while (cursor.remaining) {
2002                 num_loops += DIV_ROUND_UP_ULL(cursor.size, max_bytes);
2003                 amdgpu_res_next(&cursor, cursor.size);
2004         }
2005         num_dw = num_loops * adev->mman.buffer_funcs->fill_num_dw;
2006
2007         /* for IB padding */
2008         num_dw += 64;
2009
2010         r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, AMDGPU_IB_POOL_DELAYED,
2011                                      &job);
2012         if (r)
2013                 return r;
2014
2015         if (resv) {
2016                 r = amdgpu_sync_resv(adev, &job->sync, resv,
2017                                      AMDGPU_SYNC_ALWAYS,
2018                                      AMDGPU_FENCE_OWNER_UNDEFINED);
2019                 if (r) {
2020                         DRM_ERROR("sync failed (%d).\n", r);
2021                         goto error_free;
2022                 }
2023         }
2024
2025         amdgpu_res_first(bo->tbo.resource, 0, num_bytes, &cursor);
2026         while (cursor.remaining) {
2027                 uint32_t cur_size = min_t(uint64_t, cursor.size, max_bytes);
2028                 uint64_t dst_addr = cursor.start;
2029
2030                 dst_addr += amdgpu_ttm_domain_start(adev,
2031                                                     bo->tbo.resource->mem_type);
2032                 amdgpu_emit_fill_buffer(adev, &job->ibs[0], src_data, dst_addr,
2033                                         cur_size);
2034
2035                 amdgpu_res_next(&cursor, cur_size);
2036         }
2037
2038         amdgpu_ring_pad_ib(ring, &job->ibs[0]);
2039         WARN_ON(job->ibs[0].length_dw > num_dw);
2040         r = amdgpu_job_submit(job, &adev->mman.entity,
2041                               AMDGPU_FENCE_OWNER_UNDEFINED, fence);
2042         if (r)
2043                 goto error_free;
2044
2045         return 0;
2046
2047 error_free:
2048         amdgpu_job_free(job);
2049         return r;
2050 }
2051
2052 /**
2053  * amdgpu_ttm_evict_resources - evict memory buffers
2054  * @adev: amdgpu device object
2055  * @mem_type: evicted BO's memory type
2056  *
2057  * Evicts all @mem_type buffers on the lru list of the memory type.
2058  *
2059  * Returns:
2060  * 0 for success or a negative error code on failure.
2061  */
2062 int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type)
2063 {
2064         struct ttm_resource_manager *man;
2065
2066         switch (mem_type) {
2067         case TTM_PL_VRAM:
2068         case TTM_PL_TT:
2069         case AMDGPU_PL_GWS:
2070         case AMDGPU_PL_GDS:
2071         case AMDGPU_PL_OA:
2072                 man = ttm_manager_type(&adev->mman.bdev, mem_type);
2073                 break;
2074         default:
2075                 DRM_ERROR("Trying to evict invalid memory type\n");
2076                 return -EINVAL;
2077         }
2078
2079         return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
2080 }
2081
2082 #if defined(CONFIG_DEBUG_FS)
2083
2084 static int amdgpu_mm_vram_table_show(struct seq_file *m, void *unused)
2085 {
2086         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2087         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev,
2088                                                             TTM_PL_VRAM);
2089         struct drm_printer p = drm_seq_file_printer(m);
2090
2091         man->func->debug(man, &p);
2092         return 0;
2093 }
2094
2095 static int amdgpu_ttm_page_pool_show(struct seq_file *m, void *unused)
2096 {
2097         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2098
2099         return ttm_pool_debugfs(&adev->mman.bdev.pool, m);
2100 }
2101
2102 static int amdgpu_mm_tt_table_show(struct seq_file *m, void *unused)
2103 {
2104         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2105         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev,
2106                                                             TTM_PL_TT);
2107         struct drm_printer p = drm_seq_file_printer(m);
2108
2109         man->func->debug(man, &p);
2110         return 0;
2111 }
2112
2113 static int amdgpu_mm_gds_table_show(struct seq_file *m, void *unused)
2114 {
2115         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2116         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev,
2117                                                             AMDGPU_PL_GDS);
2118         struct drm_printer p = drm_seq_file_printer(m);
2119
2120         man->func->debug(man, &p);
2121         return 0;
2122 }
2123
2124 static int amdgpu_mm_gws_table_show(struct seq_file *m, void *unused)
2125 {
2126         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2127         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev,
2128                                                             AMDGPU_PL_GWS);
2129         struct drm_printer p = drm_seq_file_printer(m);
2130
2131         man->func->debug(man, &p);
2132         return 0;
2133 }
2134
2135 static int amdgpu_mm_oa_table_show(struct seq_file *m, void *unused)
2136 {
2137         struct amdgpu_device *adev = (struct amdgpu_device *)m->private;
2138         struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev,
2139                                                             AMDGPU_PL_OA);
2140         struct drm_printer p = drm_seq_file_printer(m);
2141
2142         man->func->debug(man, &p);
2143         return 0;
2144 }
2145
2146 DEFINE_SHOW_ATTRIBUTE(amdgpu_mm_vram_table);
2147 DEFINE_SHOW_ATTRIBUTE(amdgpu_mm_tt_table);
2148 DEFINE_SHOW_ATTRIBUTE(amdgpu_mm_gds_table);
2149 DEFINE_SHOW_ATTRIBUTE(amdgpu_mm_gws_table);
2150 DEFINE_SHOW_ATTRIBUTE(amdgpu_mm_oa_table);
2151 DEFINE_SHOW_ATTRIBUTE(amdgpu_ttm_page_pool);
2152
2153 /*
2154  * amdgpu_ttm_vram_read - Linear read access to VRAM
2155  *
2156  * Accesses VRAM via MMIO for debugging purposes.
2157  */
2158 static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
2159                                     size_t size, loff_t *pos)
2160 {
2161         struct amdgpu_device *adev = file_inode(f)->i_private;
2162         ssize_t result = 0;
2163
2164         if (size & 0x3 || *pos & 0x3)
2165                 return -EINVAL;
2166
2167         if (*pos >= adev->gmc.mc_vram_size)
2168                 return -ENXIO;
2169
2170         size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos));
2171         while (size) {
2172                 size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4);
2173                 uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ];
2174
2175                 amdgpu_device_vram_access(adev, *pos, value, bytes, false);
2176                 if (copy_to_user(buf, value, bytes))
2177                         return -EFAULT;
2178
2179                 result += bytes;
2180                 buf += bytes;
2181                 *pos += bytes;
2182                 size -= bytes;
2183         }
2184
2185         return result;
2186 }
2187
2188 /*
2189  * amdgpu_ttm_vram_write - Linear write access to VRAM
2190  *
2191  * Accesses VRAM via MMIO for debugging purposes.
2192  */
2193 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
2194                                     size_t size, loff_t *pos)
2195 {
2196         struct amdgpu_device *adev = file_inode(f)->i_private;
2197         ssize_t result = 0;
2198         int r;
2199
2200         if (size & 0x3 || *pos & 0x3)
2201                 return -EINVAL;
2202
2203         if (*pos >= adev->gmc.mc_vram_size)
2204                 return -ENXIO;
2205
2206         while (size) {
2207                 uint32_t value;
2208
2209                 if (*pos >= adev->gmc.mc_vram_size)
2210                         return result;
2211
2212                 r = get_user(value, (uint32_t *)buf);
2213                 if (r)
2214                         return r;
2215
2216                 amdgpu_device_mm_access(adev, *pos, &value, 4, true);
2217
2218                 result += 4;
2219                 buf += 4;
2220                 *pos += 4;
2221                 size -= 4;
2222         }
2223
2224         return result;
2225 }
2226
2227 static const struct file_operations amdgpu_ttm_vram_fops = {
2228         .owner = THIS_MODULE,
2229         .read = amdgpu_ttm_vram_read,
2230         .write = amdgpu_ttm_vram_write,
2231         .llseek = default_llseek,
2232 };
2233
2234 /*
2235  * amdgpu_iomem_read - Virtual read access to GPU mapped memory
2236  *
2237  * This function is used to read memory that has been mapped to the
2238  * GPU and the known addresses are not physical addresses but instead
2239  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2240  */
2241 static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
2242                                  size_t size, loff_t *pos)
2243 {
2244         struct amdgpu_device *adev = file_inode(f)->i_private;
2245         struct iommu_domain *dom;
2246         ssize_t result = 0;
2247         int r;
2248
2249         /* retrieve the IOMMU domain if any for this device */
2250         dom = iommu_get_domain_for_dev(adev->dev);
2251
2252         while (size) {
2253                 phys_addr_t addr = *pos & PAGE_MASK;
2254                 loff_t off = *pos & ~PAGE_MASK;
2255                 size_t bytes = PAGE_SIZE - off;
2256                 unsigned long pfn;
2257                 struct page *p;
2258                 void *ptr;
2259
2260                 bytes = bytes < size ? bytes : size;
2261
2262                 /* Translate the bus address to a physical address.  If
2263                  * the domain is NULL it means there is no IOMMU active
2264                  * and the address translation is the identity
2265                  */
2266                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2267
2268                 pfn = addr >> PAGE_SHIFT;
2269                 if (!pfn_valid(pfn))
2270                         return -EPERM;
2271
2272                 p = pfn_to_page(pfn);
2273                 if (p->mapping != adev->mman.bdev.dev_mapping)
2274                         return -EPERM;
2275
2276                 ptr = kmap(p);
2277                 r = copy_to_user(buf, ptr + off, bytes);
2278                 kunmap(p);
2279                 if (r)
2280                         return -EFAULT;
2281
2282                 size -= bytes;
2283                 *pos += bytes;
2284                 result += bytes;
2285         }
2286
2287         return result;
2288 }
2289
2290 /*
2291  * amdgpu_iomem_write - Virtual write access to GPU mapped memory
2292  *
2293  * This function is used to write memory that has been mapped to the
2294  * GPU and the known addresses are not physical addresses but instead
2295  * bus addresses (e.g., what you'd put in an IB or ring buffer).
2296  */
2297 static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
2298                                  size_t size, loff_t *pos)
2299 {
2300         struct amdgpu_device *adev = file_inode(f)->i_private;
2301         struct iommu_domain *dom;
2302         ssize_t result = 0;
2303         int r;
2304
2305         dom = iommu_get_domain_for_dev(adev->dev);
2306
2307         while (size) {
2308                 phys_addr_t addr = *pos & PAGE_MASK;
2309                 loff_t off = *pos & ~PAGE_MASK;
2310                 size_t bytes = PAGE_SIZE - off;
2311                 unsigned long pfn;
2312                 struct page *p;
2313                 void *ptr;
2314
2315                 bytes = bytes < size ? bytes : size;
2316
2317                 addr = dom ? iommu_iova_to_phys(dom, addr) : addr;
2318
2319                 pfn = addr >> PAGE_SHIFT;
2320                 if (!pfn_valid(pfn))
2321                         return -EPERM;
2322
2323                 p = pfn_to_page(pfn);
2324                 if (p->mapping != adev->mman.bdev.dev_mapping)
2325                         return -EPERM;
2326
2327                 ptr = kmap(p);
2328                 r = copy_from_user(ptr + off, buf, bytes);
2329                 kunmap(p);
2330                 if (r)
2331                         return -EFAULT;
2332
2333                 size -= bytes;
2334                 *pos += bytes;
2335                 result += bytes;
2336         }
2337
2338         return result;
2339 }
2340
2341 static const struct file_operations amdgpu_ttm_iomem_fops = {
2342         .owner = THIS_MODULE,
2343         .read = amdgpu_iomem_read,
2344         .write = amdgpu_iomem_write,
2345         .llseek = default_llseek
2346 };
2347
2348 #endif
2349
2350 void amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
2351 {
2352 #if defined(CONFIG_DEBUG_FS)
2353         struct drm_minor *minor = adev_to_drm(adev)->primary;
2354         struct dentry *root = minor->debugfs_root;
2355
2356         debugfs_create_file_size("amdgpu_vram", 0444, root, adev,
2357                                  &amdgpu_ttm_vram_fops, adev->gmc.mc_vram_size);
2358         debugfs_create_file("amdgpu_iomem", 0444, root, adev,
2359                             &amdgpu_ttm_iomem_fops);
2360         debugfs_create_file("amdgpu_vram_mm", 0444, root, adev,
2361                             &amdgpu_mm_vram_table_fops);
2362         debugfs_create_file("amdgpu_gtt_mm", 0444, root, adev,
2363                             &amdgpu_mm_tt_table_fops);
2364         debugfs_create_file("amdgpu_gds_mm", 0444, root, adev,
2365                             &amdgpu_mm_gds_table_fops);
2366         debugfs_create_file("amdgpu_gws_mm", 0444, root, adev,
2367                             &amdgpu_mm_gws_table_fops);
2368         debugfs_create_file("amdgpu_oa_mm", 0444, root, adev,
2369                             &amdgpu_mm_oa_table_fops);
2370         debugfs_create_file("ttm_page_pool", 0444, root, adev,
2371                             &amdgpu_ttm_page_pool_fops);
2372 #endif
2373 }