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

   1 /*
   2  * Copyright 2008 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 "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jerome Glisse <glisse@freedesktop.org>
  26  */
  27 #include <linux/pagemap.h>
  28 #include <drm/drmP.h>
  29 #include <drm/amdgpu_drm.h>
  30 #include <drm/drm_syncobj.h>
  31 #include "amdgpu.h"
  32 #include "amdgpu_trace.h"
  33
  34 static int amdgpu_cs_user_fence_chunk(struct amdgpu_cs_parser *p,
  35                                       struct drm_amdgpu_cs_chunk_fence *data,
  36                                       uint32_t *offset)
  37 {
  38         struct drm_gem_object *gobj;
  39         unsigned long size;
  40
  41         gobj = drm_gem_object_lookup(p->filp, data->handle);
  42         if (gobj == NULL)
  43                 return -EINVAL;
  44
  45         p->uf_entry.robj = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
  46         p->uf_entry.priority = 0;
  47         p->uf_entry.tv.bo = &p->uf_entry.robj->tbo;
  48         p->uf_entry.tv.shared = true;
  49         p->uf_entry.user_pages = NULL;
  50
  51         size = amdgpu_bo_size(p->uf_entry.robj);
  52         if (size != PAGE_SIZE || (data->offset + 8) > size)
  53                 return -EINVAL;
  54
  55         *offset = data->offset;
  56
  57         drm_gem_object_put_unlocked(gobj);
  58
  59         if (amdgpu_ttm_tt_get_usermm(p->uf_entry.robj->tbo.ttm)) {
  60                 amdgpu_bo_unref(&p->uf_entry.robj);
  61                 return -EINVAL;
  62         }
  63
  64         return 0;
  65 }
  66
  67 static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
  68 {
  69         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
  70         struct amdgpu_vm *vm = &fpriv->vm;
  71         union drm_amdgpu_cs *cs = data;
  72         uint64_t *chunk_array_user;
  73         uint64_t *chunk_array;
  74         unsigned size, num_ibs = 0;
  75         uint32_t uf_offset = 0;
  76         int i;
  77         int ret;
  78
  79         if (cs->in.num_chunks == 0)
  80                 return 0;
  81
  82         chunk_array = kmalloc_array(cs->in.num_chunks, sizeof(uint64_t), GFP_KERNEL);
  83         if (!chunk_array)
  84                 return -ENOMEM;
  85
  86         p->ctx = amdgpu_ctx_get(fpriv, cs->in.ctx_id);
  87         if (!p->ctx) {
  88                 ret = -EINVAL;
  89                 goto free_chunk;
  90         }
  91
  92         /* get chunks */
  93         chunk_array_user = u64_to_user_ptr(cs->in.chunks);
  94         if (copy_from_user(chunk_array, chunk_array_user,
  95                            sizeof(uint64_t)*cs->in.num_chunks)) {
  96                 ret = -EFAULT;
  97                 goto put_ctx;
  98         }
  99
 100         p->nchunks = cs->in.num_chunks;
 101         p->chunks = kmalloc_array(p->nchunks, sizeof(struct amdgpu_cs_chunk),
 102                             GFP_KERNEL);
 103         if (!p->chunks) {
 104                 ret = -ENOMEM;
 105                 goto put_ctx;
 106         }
 107
 108         for (i = 0; i < p->nchunks; i++) {
 109                 struct drm_amdgpu_cs_chunk __user **chunk_ptr = NULL;
 110                 struct drm_amdgpu_cs_chunk user_chunk;
 111                 uint32_t __user *cdata;
 112
 113                 chunk_ptr = u64_to_user_ptr(chunk_array[i]);
 114                 if (copy_from_user(&user_chunk, chunk_ptr,
 115                                        sizeof(struct drm_amdgpu_cs_chunk))) {
 116                         ret = -EFAULT;
 117                         i--;
 118                         goto free_partial_kdata;
 119                 }
 120                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 121                 p->chunks[i].length_dw = user_chunk.length_dw;
 122
 123                 size = p->chunks[i].length_dw;
 124                 cdata = u64_to_user_ptr(user_chunk.chunk_data);
 125
 126                 p->chunks[i].kdata = kvmalloc_array(size, sizeof(uint32_t), GFP_KERNEL);
 127                 if (p->chunks[i].kdata == NULL) {
 128                         ret = -ENOMEM;
 129                         i--;
 130                         goto free_partial_kdata;
 131                 }
 132                 size *= sizeof(uint32_t);
 133                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 134                         ret = -EFAULT;
 135                         goto free_partial_kdata;
 136                 }
 137
 138                 switch (p->chunks[i].chunk_id) {
 139                 case AMDGPU_CHUNK_ID_IB:
 140                         ++num_ibs;
 141                         break;
 142
 143                 case AMDGPU_CHUNK_ID_FENCE:
 144                         size = sizeof(struct drm_amdgpu_cs_chunk_fence);
 145                         if (p->chunks[i].length_dw * sizeof(uint32_t) < size) {
 146                                 ret = -EINVAL;
 147                                 goto free_partial_kdata;
 148                         }
 149
 150                         ret = amdgpu_cs_user_fence_chunk(p, p->chunks[i].kdata,
 151                                                          &uf_offset);
 152                         if (ret)
 153                                 goto free_partial_kdata;
 154
 155                         break;
 156
 157                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 158                 case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
 159                 case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
 160                         break;
 161
 162                 default:
 163                         ret = -EINVAL;
 164                         goto free_partial_kdata;
 165                 }
 166         }
 167
 168         ret = amdgpu_job_alloc(p->adev, num_ibs, &p->job, vm);
 169         if (ret)
 170                 goto free_all_kdata;
 171
 172         if (p->uf_entry.robj)
 173                 p->job->uf_addr = uf_offset;
 174         kfree(chunk_array);
 175         return 0;
 176
 177 free_all_kdata:
 178         i = p->nchunks - 1;
 179 free_partial_kdata:
 180         for (; i >= 0; i--)
 181                 kvfree(p->chunks[i].kdata);
 182         kfree(p->chunks);
 183         p->chunks = NULL;
 184         p->nchunks = 0;
 185 put_ctx:
 186         amdgpu_ctx_put(p->ctx);
 187 free_chunk:
 188         kfree(chunk_array);
 189
 190         return ret;
 191 }
 192
 193 /* Convert microseconds to bytes. */
 194 static u64 us_to_bytes(struct amdgpu_device *adev, s64 us)
 195 {
 196         if (us <= 0 || !adev->mm_stats.log2_max_MBps)
 197                 return 0;
 198
 199         /* Since accum_us is incremented by a million per second, just
 200          * multiply it by the number of MB/s to get the number of bytes.
 201          */
 202         return us << adev->mm_stats.log2_max_MBps;
 203 }
 204
 205 static s64 bytes_to_us(struct amdgpu_device *adev, u64 bytes)
 206 {
 207         if (!adev->mm_stats.log2_max_MBps)
 208                 return 0;
 209
 210         return bytes >> adev->mm_stats.log2_max_MBps;
 211 }
 212
 213 /* Returns how many bytes TTM can move right now. If no bytes can be moved,
 214  * it returns 0. If it returns non-zero, it's OK to move at least one buffer,
 215  * which means it can go over the threshold once. If that happens, the driver
 216  * will be in debt and no other buffer migrations can be done until that debt
 217  * is repaid.
 218  *
 219  * This approach allows moving a buffer of any size (it's important to allow
 220  * that).
 221  *
 222  * The currency is simply time in microseconds and it increases as the clock
 223  * ticks. The accumulated microseconds (us) are converted to bytes and
 224  * returned.
 225  */
 226 static void amdgpu_cs_get_threshold_for_moves(struct amdgpu_device *adev,
 227                                               u64 *max_bytes,
 228                                               u64 *max_vis_bytes)
 229 {
 230         s64 time_us, increment_us;
 231         u64 free_vram, total_vram, used_vram;
 232
 233         /* Allow a maximum of 200 accumulated ms. This is basically per-IB
 234          * throttling.
 235          *
 236          * It means that in order to get full max MBps, at least 5 IBs per
 237          * second must be submitted and not more than 200ms apart from each
 238          * other.
 239          */
 240         const s64 us_upper_bound = 200000;
 241
 242         if (!adev->mm_stats.log2_max_MBps) {
 243                 *max_bytes = 0;
 244                 *max_vis_bytes = 0;
 245                 return;
 246         }
 247
 248         total_vram = adev->mc.real_vram_size - adev->vram_pin_size;
 249         used_vram = amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
 250         free_vram = used_vram >= total_vram ? 0 : total_vram - used_vram;
 251
 252         spin_lock(&adev->mm_stats.lock);
 253
 254         /* Increase the amount of accumulated us. */
 255         time_us = ktime_to_us(ktime_get());
 256         increment_us = time_us - adev->mm_stats.last_update_us;
 257         adev->mm_stats.last_update_us = time_us;
 258         adev->mm_stats.accum_us = min(adev->mm_stats.accum_us + increment_us,
 259                                       us_upper_bound);
 260
 261         /* This prevents the short period of low performance when the VRAM
 262          * usage is low and the driver is in debt or doesn't have enough
 263          * accumulated us to fill VRAM quickly.
 264          *
 265          * The situation can occur in these cases:
 266          * - a lot of VRAM is freed by userspace
 267          * - the presence of a big buffer causes a lot of evictions
 268          *   (solution: split buffers into smaller ones)
 269          *
 270          * If 128 MB or 1/8th of VRAM is free, start filling it now by setting
 271          * accum_us to a positive number.
 272          */
 273         if (free_vram >= 128 * 1024 * 1024 || free_vram >= total_vram / 8) {
 274                 s64 min_us;
 275
 276                 /* Be more aggresive on dGPUs. Try to fill a portion of free
 277                  * VRAM now.
 278                  */
 279                 if (!(adev->flags & AMD_IS_APU))
 280                         min_us = bytes_to_us(adev, free_vram / 4);
 281                 else
 282                         min_us = 0; /* Reset accum_us on APUs. */
 283
 284                 adev->mm_stats.accum_us = max(min_us, adev->mm_stats.accum_us);
 285         }
 286
 287         /* This is set to 0 if the driver is in debt to disallow (optional)
 288          * buffer moves.
 289          */
 290         *max_bytes = us_to_bytes(adev, adev->mm_stats.accum_us);
 291
 292         /* Do the same for visible VRAM if half of it is free */
 293         if (adev->mc.visible_vram_size < adev->mc.real_vram_size) {
 294                 u64 total_vis_vram = adev->mc.visible_vram_size;
 295                 u64 used_vis_vram =
 296                         amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]);
 297
 298                 if (used_vis_vram < total_vis_vram) {
 299                         u64 free_vis_vram = total_vis_vram - used_vis_vram;
 300                         adev->mm_stats.accum_us_vis = min(adev->mm_stats.accum_us_vis +
 301                                                           increment_us, us_upper_bound);
 302
 303                         if (free_vis_vram >= total_vis_vram / 2)
 304                                 adev->mm_stats.accum_us_vis =
 305                                         max(bytes_to_us(adev, free_vis_vram / 2),
 306                                             adev->mm_stats.accum_us_vis);
 307                 }
 308
 309                 *max_vis_bytes = us_to_bytes(adev, adev->mm_stats.accum_us_vis);
 310         } else {
 311                 *max_vis_bytes = 0;
 312         }
 313
 314         spin_unlock(&adev->mm_stats.lock);
 315 }
 316
 317 /* Report how many bytes have really been moved for the last command
 318  * submission. This can result in a debt that can stop buffer migrations
 319  * temporarily.
 320  */
 321 void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
 322                                   u64 num_vis_bytes)
 323 {
 324         spin_lock(&adev->mm_stats.lock);
 325         adev->mm_stats.accum_us -= bytes_to_us(adev, num_bytes);
 326         adev->mm_stats.accum_us_vis -= bytes_to_us(adev, num_vis_bytes);
 327         spin_unlock(&adev->mm_stats.lock);
 328 }
 329
 330 static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
 331                                  struct amdgpu_bo *bo)
 332 {
 333         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 334         u64 initial_bytes_moved, bytes_moved;
 335         uint32_t domain;
 336         int r;
 337
 338         if (bo->pin_count)
 339                 return 0;
 340
 341         /* Don't move this buffer if we have depleted our allowance
 342          * to move it. Don't move anything if the threshold is zero.
 343          */
 344         if (p->bytes_moved < p->bytes_moved_threshold) {
 345                 if (adev->mc.visible_vram_size < adev->mc.real_vram_size &&
 346                     (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)) {
 347                         /* And don't move a CPU_ACCESS_REQUIRED BO to limited
 348                          * visible VRAM if we've depleted our allowance to do
 349                          * that.
 350                          */
 351                         if (p->bytes_moved_vis < p->bytes_moved_vis_threshold)
 352                                 domain = bo->preferred_domains;
 353                         else
 354                                 domain = bo->allowed_domains;
 355                 } else {
 356                         domain = bo->preferred_domains;
 357                 }
 358         } else {
 359                 domain = bo->allowed_domains;
 360         }
 361
 362 retry:
 363         amdgpu_ttm_placement_from_domain(bo, domain);
 364         initial_bytes_moved = atomic64_read(&adev->num_bytes_moved);
 365         r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 366         bytes_moved = atomic64_read(&adev->num_bytes_moved) -
 367                       initial_bytes_moved;
 368         p->bytes_moved += bytes_moved;
 369         if (adev->mc.visible_vram_size < adev->mc.real_vram_size &&
 370             bo->tbo.mem.mem_type == TTM_PL_VRAM &&
 371             bo->tbo.mem.start < adev->mc.visible_vram_size >> PAGE_SHIFT)
 372                 p->bytes_moved_vis += bytes_moved;
 373
 374         if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 375                 domain = bo->allowed_domains;
 376                 goto retry;
 377         }
 378
 379         return r;
 380 }
 381
 382 /* Last resort, try to evict something from the current working set */
 383 static bool amdgpu_cs_try_evict(struct amdgpu_cs_parser *p,
 384                                 struct amdgpu_bo *validated)
 385 {
 386         uint32_t domain = validated->allowed_domains;
 387         int r;
 388
 389         if (!p->evictable)
 390                 return false;
 391
 392         for (;&p->evictable->tv.head != &p->validated;
 393              p->evictable = list_prev_entry(p->evictable, tv.head)) {
 394
 395                 struct amdgpu_bo_list_entry *candidate = p->evictable;
 396                 struct amdgpu_bo *bo = candidate->robj;
 397                 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 398                 u64 initial_bytes_moved, bytes_moved;
 399                 bool update_bytes_moved_vis;
 400                 uint32_t other;
 401
 402                 /* If we reached our current BO we can forget it */
 403                 if (candidate->robj == validated)
 404                         break;
 405
 406                 other = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
 407
 408                 /* Check if this BO is in one of the domains we need space for */
 409                 if (!(other & domain))
 410                         continue;
 411
 412                 /* Check if we can move this BO somewhere else */
 413                 other = bo->allowed_domains & ~domain;
 414                 if (!other)
 415                         continue;
 416
 417                 /* Good we can try to move this BO somewhere else */
 418                 amdgpu_ttm_placement_from_domain(bo, other);
 419                 update_bytes_moved_vis =
 420                         adev->mc.visible_vram_size < adev->mc.real_vram_size &&
 421                         bo->tbo.mem.mem_type == TTM_PL_VRAM &&
 422                         bo->tbo.mem.start < adev->mc.visible_vram_size >> PAGE_SHIFT;
 423                 initial_bytes_moved = atomic64_read(&adev->num_bytes_moved);
 424                 r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
 425                 bytes_moved = atomic64_read(&adev->num_bytes_moved) -
 426                         initial_bytes_moved;
 427                 p->bytes_moved += bytes_moved;
 428                 if (update_bytes_moved_vis)
 429                         p->bytes_moved_vis += bytes_moved;
 430
 431                 if (unlikely(r))
 432                         break;
 433
 434                 p->evictable = list_prev_entry(p->evictable, tv.head);
 435                 list_move(&candidate->tv.head, &p->validated);
 436
 437                 return true;
 438         }
 439
 440         return false;
 441 }
 442
 443 static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo)
 444 {
 445         struct amdgpu_cs_parser *p = param;
 446         int r;
 447
 448         do {
 449                 r = amdgpu_cs_bo_validate(p, bo);
 450         } while (r == -ENOMEM && amdgpu_cs_try_evict(p, bo));
 451         if (r)
 452                 return r;
 453
 454         if (bo->shadow)
 455                 r = amdgpu_cs_bo_validate(p, bo->shadow);
 456
 457         return r;
 458 }
 459
 460 static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 461                             struct list_head *validated)
 462 {
 463         struct amdgpu_bo_list_entry *lobj;
 464         int r;
 465
 466         list_for_each_entry(lobj, validated, tv.head) {
 467                 struct amdgpu_bo *bo = lobj->robj;
 468                 bool binding_userptr = false;
 469                 struct mm_struct *usermm;
 470
 471                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 472                 if (usermm && usermm != current->mm)
 473                         return -EPERM;
 474
 475                 /* Check if we have user pages and nobody bound the BO already */
 476                 if (lobj->user_pages && bo->tbo.ttm->state != tt_bound) {
 477                         size_t size = sizeof(struct page *);
 478
 479                         size *= bo->tbo.ttm->num_pages;
 480                         memcpy(bo->tbo.ttm->pages, lobj->user_pages, size);
 481                         binding_userptr = true;
 482                 }
 483
 484                 if (p->evictable == lobj)
 485                         p->evictable = NULL;
 486
 487                 r = amdgpu_cs_validate(p, bo);
 488                 if (r)
 489                         return r;
 490
 491                 if (binding_userptr) {
 492                         kvfree(lobj->user_pages);
 493                         lobj->user_pages = NULL;
 494                 }
 495         }
 496         return 0;
 497 }
 498
 499 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 500                                 union drm_amdgpu_cs *cs)
 501 {
 502         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 503         struct amdgpu_bo_list_entry *e;
 504         struct list_head duplicates;
 505         bool need_mmap_lock = false;
 506         unsigned i, tries = 10;
 507         int r;
 508
 509         INIT_LIST_HEAD(&p->validated);
 510
 511         p->bo_list = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle);
 512         if (p->bo_list) {
 513                 need_mmap_lock = p->bo_list->first_userptr !=
 514                         p->bo_list->num_entries;
 515                 amdgpu_bo_list_get_list(p->bo_list, &p->validated);
 516         }
 517
 518         INIT_LIST_HEAD(&duplicates);
 519         amdgpu_vm_get_pd_bo(&fpriv->vm, &p->validated, &p->vm_pd);
 520
 521         if (p->uf_entry.robj)
 522                 list_add(&p->uf_entry.tv.head, &p->validated);
 523
 524         if (need_mmap_lock)
 525                 down_read(&current->mm->mmap_sem);
 526
 527         while (1) {
 528                 struct list_head need_pages;
 529                 unsigned i;
 530
 531                 r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true,
 532                                            &duplicates);
 533                 if (unlikely(r != 0)) {
 534                         if (r != -ERESTARTSYS)
 535                                 DRM_ERROR("ttm_eu_reserve_buffers failed.\n");
 536                         goto error_free_pages;
 537                 }
 538
 539                 /* Without a BO list we don't have userptr BOs */
 540                 if (!p->bo_list)
 541                         break;
 542
 543                 INIT_LIST_HEAD(&need_pages);
 544                 for (i = p->bo_list->first_userptr;
 545                      i < p->bo_list->num_entries; ++i) {
 546
 547                         e = &p->bo_list->array[i];
 548
 549                         if (amdgpu_ttm_tt_userptr_invalidated(e->robj->tbo.ttm,
 550                                  &e->user_invalidated) && e->user_pages) {
 551
 552                                 /* We acquired a page array, but somebody
 553                                  * invalidated it. Free it and try again
 554                                  */
 555                                 release_pages(e->user_pages,
 556                                               e->robj->tbo.ttm->num_pages,
 557                                               false);
 558                                 kvfree(e->user_pages);
 559                                 e->user_pages = NULL;
 560                         }
 561
 562                         if (e->robj->tbo.ttm->state != tt_bound &&
 563                             !e->user_pages) {
 564                                 list_del(&e->tv.head);
 565                                 list_add(&e->tv.head, &need_pages);
 566
 567                                 amdgpu_bo_unreserve(e->robj);
 568                         }
 569                 }
 570
 571                 if (list_empty(&need_pages))
 572                         break;
 573
 574                 /* Unreserve everything again. */
 575                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 576
 577                 /* We tried too many times, just abort */
 578                 if (!--tries) {
 579                         r = -EDEADLK;
 580                         DRM_ERROR("deadlock in %s\n", __func__);
 581                         goto error_free_pages;
 582                 }
 583
 584                 /* Fill the page arrays for all userptrs. */
 585                 list_for_each_entry(e, &need_pages, tv.head) {
 586                         struct ttm_tt *ttm = e->robj->tbo.ttm;
 587
 588                         e->user_pages = kvmalloc_array(ttm->num_pages,
 589                                                          sizeof(struct page*),
 590                                                          GFP_KERNEL | __GFP_ZERO);
 591                         if (!e->user_pages) {
 592                                 r = -ENOMEM;
 593                                 DRM_ERROR("calloc failure in %s\n", __func__);
 594                                 goto error_free_pages;
 595                         }
 596
 597                         r = amdgpu_ttm_tt_get_user_pages(ttm, e->user_pages);
 598                         if (r) {
 599                                 DRM_ERROR("amdgpu_ttm_tt_get_user_pages failed.\n");
 600                                 kvfree(e->user_pages);
 601                                 e->user_pages = NULL;
 602                                 goto error_free_pages;
 603                         }
 604                 }
 605
 606                 /* And try again. */
 607                 list_splice(&need_pages, &p->validated);
 608         }
 609
 610         amdgpu_cs_get_threshold_for_moves(p->adev, &p->bytes_moved_threshold,
 611                                           &p->bytes_moved_vis_threshold);
 612         p->bytes_moved = 0;
 613         p->bytes_moved_vis = 0;
 614         p->evictable = list_last_entry(&p->validated,
 615                                        struct amdgpu_bo_list_entry,
 616                                        tv.head);
 617
 618         r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
 619                                       amdgpu_cs_validate, p);
 620         if (r) {
 621                 DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
 622                 goto error_validate;
 623         }
 624
 625         r = amdgpu_cs_list_validate(p, &duplicates);
 626         if (r) {
 627                 DRM_ERROR("amdgpu_cs_list_validate(duplicates) failed.\n");
 628                 goto error_validate;
 629         }
 630
 631         r = amdgpu_cs_list_validate(p, &p->validated);
 632         if (r) {
 633                 DRM_ERROR("amdgpu_cs_list_validate(validated) failed.\n");
 634                 goto error_validate;
 635         }
 636
 637         amdgpu_cs_report_moved_bytes(p->adev, p->bytes_moved,
 638                                      p->bytes_moved_vis);
 639         fpriv->vm.last_eviction_counter =
 640                 atomic64_read(&p->adev->num_evictions);
 641
 642         if (p->bo_list) {
 643                 struct amdgpu_bo *gds = p->bo_list->gds_obj;
 644                 struct amdgpu_bo *gws = p->bo_list->gws_obj;
 645                 struct amdgpu_bo *oa = p->bo_list->oa_obj;
 646                 struct amdgpu_vm *vm = &fpriv->vm;
 647                 unsigned i;
 648
 649                 for (i = 0; i < p->bo_list->num_entries; i++) {
 650                         struct amdgpu_bo *bo = p->bo_list->array[i].robj;
 651
 652                         p->bo_list->array[i].bo_va = amdgpu_vm_bo_find(vm, bo);
 653                 }
 654
 655                 if (gds) {
 656                         p->job->gds_base = amdgpu_bo_gpu_offset(gds);
 657                         p->job->gds_size = amdgpu_bo_size(gds);
 658                 }
 659                 if (gws) {
 660                         p->job->gws_base = amdgpu_bo_gpu_offset(gws);
 661                         p->job->gws_size = amdgpu_bo_size(gws);
 662                 }
 663                 if (oa) {
 664                         p->job->oa_base = amdgpu_bo_gpu_offset(oa);
 665                         p->job->oa_size = amdgpu_bo_size(oa);
 666                 }
 667         }
 668
 669         if (!r && p->uf_entry.robj) {
 670                 struct amdgpu_bo *uf = p->uf_entry.robj;
 671
 672                 r = amdgpu_ttm_bind(&uf->tbo, &uf->tbo.mem);
 673                 p->job->uf_addr += amdgpu_bo_gpu_offset(uf);
 674         }
 675
 676 error_validate:
 677         if (r)
 678                 ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 679
 680 error_free_pages:
 681
 682         if (need_mmap_lock)
 683                 up_read(&current->mm->mmap_sem);
 684
 685         if (p->bo_list) {
 686                 for (i = p->bo_list->first_userptr;
 687                      i < p->bo_list->num_entries; ++i) {
 688                         e = &p->bo_list->array[i];
 689
 690                         if (!e->user_pages)
 691                                 continue;
 692
 693                         release_pages(e->user_pages,
 694                                       e->robj->tbo.ttm->num_pages,
 695                                       false);
 696                         kvfree(e->user_pages);
 697                 }
 698         }
 699
 700         return r;
 701 }
 702
 703 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 704 {
 705         struct amdgpu_bo_list_entry *e;
 706         int r;
 707
 708         list_for_each_entry(e, &p->validated, tv.head) {
 709                 struct reservation_object *resv = e->robj->tbo.resv;
 710                 r = amdgpu_sync_resv(p->adev, &p->job->sync, resv, p->filp);
 711
 712                 if (r)
 713                         return r;
 714         }
 715         return 0;
 716 }
 717
 718 /**
 719  * cs_parser_fini() - clean parser states
 720  * @parser:     parser structure holding parsing context.
 721  * @error:      error number
 722  *
 723  * If error is set than unvalidate buffer, otherwise just free memory
 724  * used by parsing context.
 725  **/
 726 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error,
 727                                   bool backoff)
 728 {
 729         unsigned i;
 730
 731         if (!error)
 732                 ttm_eu_fence_buffer_objects(&parser->ticket,
 733                                             &parser->validated,
 734                                             parser->fence);
 735         else if (backoff)
 736                 ttm_eu_backoff_reservation(&parser->ticket,
 737                                            &parser->validated);
 738
 739         for (i = 0; i < parser->num_post_dep_syncobjs; i++)
 740                 drm_syncobj_put(parser->post_dep_syncobjs[i]);
 741         kfree(parser->post_dep_syncobjs);
 742
 743         dma_fence_put(parser->fence);
 744
 745         if (parser->ctx)
 746                 amdgpu_ctx_put(parser->ctx);
 747         if (parser->bo_list)
 748                 amdgpu_bo_list_put(parser->bo_list);
 749
 750         for (i = 0; i < parser->nchunks; i++)
 751                 kvfree(parser->chunks[i].kdata);
 752         kfree(parser->chunks);
 753         if (parser->job)
 754                 amdgpu_job_free(parser->job);
 755         amdgpu_bo_unref(&parser->uf_entry.robj);
 756 }
 757
 758 static int amdgpu_bo_vm_update_pte(struct amdgpu_cs_parser *p)
 759 {
 760         struct amdgpu_device *adev = p->adev;
 761         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 762         struct amdgpu_vm *vm = &fpriv->vm;
 763         struct amdgpu_bo_va *bo_va;
 764         struct amdgpu_bo *bo;
 765         int i, r;
 766
 767         r = amdgpu_vm_update_directories(adev, vm);
 768         if (r)
 769                 return r;
 770
 771         r = amdgpu_sync_fence(adev, &p->job->sync, vm->last_dir_update);
 772         if (r)
 773                 return r;
 774
 775         r = amdgpu_vm_clear_freed(adev, vm, NULL);
 776         if (r)
 777                 return r;
 778
 779         r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false);
 780         if (r)
 781                 return r;
 782
 783         r = amdgpu_sync_fence(adev, &p->job->sync,
 784                               fpriv->prt_va->last_pt_update);
 785         if (r)
 786                 return r;
 787
 788         if (amdgpu_sriov_vf(adev)) {
 789                 struct dma_fence *f;
 790
 791                 bo_va = fpriv->csa_va;
 792                 BUG_ON(!bo_va);
 793                 r = amdgpu_vm_bo_update(adev, bo_va, false);
 794                 if (r)
 795                         return r;
 796
 797                 f = bo_va->last_pt_update;
 798                 r = amdgpu_sync_fence(adev, &p->job->sync, f);
 799                 if (r)
 800                         return r;
 801         }
 802
 803         if (p->bo_list) {
 804                 for (i = 0; i < p->bo_list->num_entries; i++) {
 805                         struct dma_fence *f;
 806
 807                         /* ignore duplicates */
 808                         bo = p->bo_list->array[i].robj;
 809                         if (!bo)
 810                                 continue;
 811
 812                         bo_va = p->bo_list->array[i].bo_va;
 813                         if (bo_va == NULL)
 814                                 continue;
 815
 816                         r = amdgpu_vm_bo_update(adev, bo_va, false);
 817                         if (r)
 818                                 return r;
 819
 820                         f = bo_va->last_pt_update;
 821                         r = amdgpu_sync_fence(adev, &p->job->sync, f);
 822                         if (r)
 823                                 return r;
 824                 }
 825
 826         }
 827
 828         r = amdgpu_vm_clear_moved(adev, vm, &p->job->sync);
 829
 830         if (amdgpu_vm_debug && p->bo_list) {
 831                 /* Invalidate all BOs to test for userspace bugs */
 832                 for (i = 0; i < p->bo_list->num_entries; i++) {
 833                         /* ignore duplicates */
 834                         bo = p->bo_list->array[i].robj;
 835                         if (!bo)
 836                                 continue;
 837
 838                         amdgpu_vm_bo_invalidate(adev, bo);
 839                 }
 840         }
 841
 842         return r;
 843 }
 844
 845 static int amdgpu_cs_ib_vm_chunk(struct amdgpu_device *adev,
 846                                  struct amdgpu_cs_parser *p)
 847 {
 848         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 849         struct amdgpu_vm *vm = &fpriv->vm;
 850         struct amdgpu_ring *ring = p->job->ring;
 851         int i, r;
 852
 853         /* Only for UVD/VCE VM emulation */
 854         if (ring->funcs->parse_cs) {
 855                 for (i = 0; i < p->job->num_ibs; i++) {
 856                         r = amdgpu_ring_parse_cs(ring, p, i);
 857                         if (r)
 858                                 return r;
 859                 }
 860         }
 861
 862         if (p->job->vm) {
 863                 p->job->vm_pd_addr = amdgpu_bo_gpu_offset(vm->root.bo);
 864
 865                 r = amdgpu_bo_vm_update_pte(p);
 866                 if (r)
 867                         return r;
 868         }
 869
 870         return amdgpu_cs_sync_rings(p);
 871 }
 872
 873 static int amdgpu_cs_ib_fill(struct amdgpu_device *adev,
 874                              struct amdgpu_cs_parser *parser)
 875 {
 876         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
 877         struct amdgpu_vm *vm = &fpriv->vm;
 878         int i, j;
 879         int r, ce_preempt = 0, de_preempt = 0;
 880
 881         for (i = 0, j = 0; i < parser->nchunks && j < parser->job->num_ibs; i++) {
 882                 struct amdgpu_cs_chunk *chunk;
 883                 struct amdgpu_ib *ib;
 884                 struct drm_amdgpu_cs_chunk_ib *chunk_ib;
 885                 struct amdgpu_ring *ring;
 886
 887                 chunk = &parser->chunks[i];
 888                 ib = &parser->job->ibs[j];
 889                 chunk_ib = (struct drm_amdgpu_cs_chunk_ib *)chunk->kdata;
 890
 891                 if (chunk->chunk_id != AMDGPU_CHUNK_ID_IB)
 892                         continue;
 893
 894                 if (chunk_ib->ip_type == AMDGPU_HW_IP_GFX && amdgpu_sriov_vf(adev)) {
 895                         if (chunk_ib->flags & AMDGPU_IB_FLAG_PREEMPT) {
 896                                 if (chunk_ib->flags & AMDGPU_IB_FLAG_CE)
 897                                         ce_preempt++;
 898                                 else
 899                                         de_preempt++;
 900                         }
 901
 902                         /* each GFX command submit allows 0 or 1 IB preemptible for CE & DE */
 903                         if (ce_preempt > 1 || de_preempt > 1)
 904                                 return -EINVAL;
 905                 }
 906
 907                 r = amdgpu_queue_mgr_map(adev, &parser->ctx->queue_mgr, chunk_ib->ip_type,
 908                                          chunk_ib->ip_instance, chunk_ib->ring, &ring);
 909                 if (r)
 910                         return r;
 911
 912                 if (chunk_ib->flags & AMDGPU_IB_FLAG_PREAMBLE) {
 913                         parser->job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT;
 914                         if (!parser->ctx->preamble_presented) {
 915                                 parser->job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT_FIRST;
 916                                 parser->ctx->preamble_presented = true;
 917                         }
 918                 }
 919
 920                 if (parser->job->ring && parser->job->ring != ring)
 921                         return -EINVAL;
 922
 923                 parser->job->ring = ring;
 924
 925                 if (ring->funcs->parse_cs) {
 926                         struct amdgpu_bo_va_mapping *m;
 927                         struct amdgpu_bo *aobj = NULL;
 928                         uint64_t offset;
 929                         uint8_t *kptr;
 930
 931                         m = amdgpu_cs_find_mapping(parser, chunk_ib->va_start,
 932                                                    &aobj);
 933                         if (!aobj) {
 934                                 DRM_ERROR("IB va_start is invalid\n");
 935                                 return -EINVAL;
 936                         }
 937
 938                         if ((chunk_ib->va_start + chunk_ib->ib_bytes) >
 939                             (m->last + 1) * AMDGPU_GPU_PAGE_SIZE) {
 940                                 DRM_ERROR("IB va_start+ib_bytes is invalid\n");
 941                                 return -EINVAL;
 942                         }
 943
 944                         /* the IB should be reserved at this point */
 945                         r = amdgpu_bo_kmap(aobj, (void **)&kptr);
 946                         if (r) {
 947                                 return r;
 948                         }
 949
 950                         offset = m->start * AMDGPU_GPU_PAGE_SIZE;
 951                         kptr += chunk_ib->va_start - offset;
 952
 953                         r =  amdgpu_ib_get(adev, vm, chunk_ib->ib_bytes, ib);
 954                         if (r) {
 955                                 DRM_ERROR("Failed to get ib !\n");
 956                                 return r;
 957                         }
 958
 959                         memcpy(ib->ptr, kptr, chunk_ib->ib_bytes);
 960                         amdgpu_bo_kunmap(aobj);
 961                 } else {
 962                         r =  amdgpu_ib_get(adev, vm, 0, ib);
 963                         if (r) {
 964                                 DRM_ERROR("Failed to get ib !\n");
 965                                 return r;
 966                         }
 967
 968                 }
 969
 970                 ib->gpu_addr = chunk_ib->va_start;
 971                 ib->length_dw = chunk_ib->ib_bytes / 4;
 972                 ib->flags = chunk_ib->flags;
 973                 j++;
 974         }
 975
 976         /* UVD & VCE fw doesn't support user fences */
 977         if (parser->job->uf_addr && (
 978             parser->job->ring->funcs->type == AMDGPU_RING_TYPE_UVD ||
 979             parser->job->ring->funcs->type == AMDGPU_RING_TYPE_VCE))
 980                 return -EINVAL;
 981
 982         return 0;
 983 }
 984
 985 static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
 986                                        struct amdgpu_cs_chunk *chunk)
 987 {
 988         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 989         unsigned num_deps;
 990         int i, r;
 991         struct drm_amdgpu_cs_chunk_dep *deps;
 992
 993         deps = (struct drm_amdgpu_cs_chunk_dep *)chunk->kdata;
 994         num_deps = chunk->length_dw * 4 /
 995                 sizeof(struct drm_amdgpu_cs_chunk_dep);
 996
 997         for (i = 0; i < num_deps; ++i) {
 998                 struct amdgpu_ring *ring;
 999                 struct amdgpu_ctx *ctx;
1000                 struct dma_fence *fence;
1001
1002                 ctx = amdgpu_ctx_get(fpriv, deps[i].ctx_id);
1003                 if (ctx == NULL)
1004                         return -EINVAL;
1005
1006                 r = amdgpu_queue_mgr_map(p->adev, &ctx->queue_mgr,
1007                                          deps[i].ip_type,
1008                                          deps[i].ip_instance,
1009                                          deps[i].ring, &ring);
1010                 if (r) {
1011                         amdgpu_ctx_put(ctx);
1012                         return r;
1013                 }
1014
1015                 fence = amdgpu_ctx_get_fence(ctx, ring,
1016                                              deps[i].handle);
1017                 if (IS_ERR(fence)) {
1018                         r = PTR_ERR(fence);
1019                         amdgpu_ctx_put(ctx);
1020                         return r;
1021                 } else if (fence) {
1022                         r = amdgpu_sync_fence(p->adev, &p->job->sync,
1023                                               fence);
1024                         dma_fence_put(fence);
1025                         amdgpu_ctx_put(ctx);
1026                         if (r)
1027                                 return r;
1028                 }
1029         }
1030         return 0;
1031 }
1032
1033 static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,
1034                                                  uint32_t handle)
1035 {
1036         int r;
1037         struct dma_fence *fence;
1038         r = drm_syncobj_find_fence(p->filp, handle, &fence);
1039         if (r)
1040                 return r;
1041
1042         r = amdgpu_sync_fence(p->adev, &p->job->sync, fence);
1043         dma_fence_put(fence);
1044
1045         return r;
1046 }
1047
1048 static int amdgpu_cs_process_syncobj_in_dep(struct amdgpu_cs_parser *p,
1049                                             struct amdgpu_cs_chunk *chunk)
1050 {
1051         unsigned num_deps;
1052         int i, r;
1053         struct drm_amdgpu_cs_chunk_sem *deps;
1054
1055         deps = (struct drm_amdgpu_cs_chunk_sem *)chunk->kdata;
1056         num_deps = chunk->length_dw * 4 /
1057                 sizeof(struct drm_amdgpu_cs_chunk_sem);
1058
1059         for (i = 0; i < num_deps; ++i) {
1060                 r = amdgpu_syncobj_lookup_and_add_to_sync(p, deps[i].handle);
1061                 if (r)
1062                         return r;
1063         }
1064         return 0;
1065 }
1066
1067 static int amdgpu_cs_process_syncobj_out_dep(struct amdgpu_cs_parser *p,
1068                                              struct amdgpu_cs_chunk *chunk)
1069 {
1070         unsigned num_deps;
1071         int i;
1072         struct drm_amdgpu_cs_chunk_sem *deps;
1073         deps = (struct drm_amdgpu_cs_chunk_sem *)chunk->kdata;
1074         num_deps = chunk->length_dw * 4 /
1075                 sizeof(struct drm_amdgpu_cs_chunk_sem);
1076
1077         p->post_dep_syncobjs = kmalloc_array(num_deps,
1078                                              sizeof(struct drm_syncobj *),
1079                                              GFP_KERNEL);
1080         p->num_post_dep_syncobjs = 0;
1081
1082         for (i = 0; i < num_deps; ++i) {
1083                 p->post_dep_syncobjs[i] = drm_syncobj_find(p->filp, deps[i].handle);
1084                 if (!p->post_dep_syncobjs[i])
1085                         return -EINVAL;
1086                 p->num_post_dep_syncobjs++;
1087         }
1088         return 0;
1089 }
1090
1091 static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
1092                                   struct amdgpu_cs_parser *p)
1093 {
1094         int i, r;
1095
1096         for (i = 0; i < p->nchunks; ++i) {
1097                 struct amdgpu_cs_chunk *chunk;
1098
1099                 chunk = &p->chunks[i];
1100
1101                 if (chunk->chunk_id == AMDGPU_CHUNK_ID_DEPENDENCIES) {
1102                         r = amdgpu_cs_process_fence_dep(p, chunk);
1103                         if (r)
1104                                 return r;
1105                 } else if (chunk->chunk_id == AMDGPU_CHUNK_ID_SYNCOBJ_IN) {
1106                         r = amdgpu_cs_process_syncobj_in_dep(p, chunk);
1107                         if (r)
1108                                 return r;
1109                 } else if (chunk->chunk_id == AMDGPU_CHUNK_ID_SYNCOBJ_OUT) {
1110                         r = amdgpu_cs_process_syncobj_out_dep(p, chunk);
1111                         if (r)
1112                                 return r;
1113                 }
1114         }
1115
1116         return 0;
1117 }
1118
1119 static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
1120 {
1121         int i;
1122
1123         for (i = 0; i < p->num_post_dep_syncobjs; ++i)
1124                 drm_syncobj_replace_fence(p->post_dep_syncobjs[i], p->fence);
1125 }
1126
1127 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
1128                             union drm_amdgpu_cs *cs)
1129 {
1130         struct amdgpu_ring *ring = p->job->ring;
1131         struct amd_sched_entity *entity = &p->ctx->rings[ring->idx].entity;
1132         struct amdgpu_job *job;
1133         int r;
1134
1135         job = p->job;
1136         p->job = NULL;
1137
1138         r = amd_sched_job_init(&job->base, &ring->sched, entity, p->filp);
1139         if (r) {
1140                 amdgpu_job_free(job);
1141                 return r;
1142         }
1143
1144         job->owner = p->filp;
1145         job->fence_ctx = entity->fence_context;
1146         p->fence = dma_fence_get(&job->base.s_fence->finished);
1147
1148         amdgpu_cs_post_dependencies(p);
1149
1150         cs->out.handle = amdgpu_ctx_add_fence(p->ctx, ring, p->fence);
1151         job->uf_sequence = cs->out.handle;
1152         amdgpu_job_free_resources(job);
1153         amdgpu_cs_parser_fini(p, 0, true);
1154
1155         trace_amdgpu_cs_ioctl(job);
1156         amd_sched_entity_push_job(&job->base);
1157         return 0;
1158 }
1159
1160 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
1161 {
1162         struct amdgpu_device *adev = dev->dev_private;
1163         struct amdgpu_fpriv *fpriv = filp->driver_priv;
1164         union drm_amdgpu_cs *cs = data;
1165         struct amdgpu_cs_parser parser = {};
1166         bool reserved_buffers = false;
1167         int i, r;
1168
1169         if (!adev->accel_working)
1170                 return -EBUSY;
1171         if (amdgpu_kms_vram_lost(adev, fpriv))
1172                 return -ENODEV;
1173
1174         parser.adev = adev;
1175         parser.filp = filp;
1176
1177         r = amdgpu_cs_parser_init(&parser, data);
1178         if (r) {
1179                 DRM_ERROR("Failed to initialize parser !\n");
1180                 goto out;
1181         }
1182
1183         r = amdgpu_cs_parser_bos(&parser, data);
1184         if (r) {
1185                 if (r == -ENOMEM)
1186                         DRM_ERROR("Not enough memory for command submission!\n");
1187                 else if (r != -ERESTARTSYS)
1188                         DRM_ERROR("Failed to process the buffer list %d!\n", r);
1189                 goto out;
1190         }
1191
1192         reserved_buffers = true;
1193         r = amdgpu_cs_ib_fill(adev, &parser);
1194         if (r)
1195                 goto out;
1196
1197         r = amdgpu_cs_dependencies(adev, &parser);
1198         if (r) {
1199                 DRM_ERROR("Failed in the dependencies handling %d!\n", r);
1200                 goto out;
1201         }
1202
1203         for (i = 0; i < parser.job->num_ibs; i++)
1204                 trace_amdgpu_cs(&parser, i);
1205
1206         r = amdgpu_cs_ib_vm_chunk(adev, &parser);
1207         if (r)
1208                 goto out;
1209
1210         r = amdgpu_cs_submit(&parser, cs);
1211         if (r)
1212                 goto out;
1213
1214         return 0;
1215 out:
1216         amdgpu_cs_parser_fini(&parser, r, reserved_buffers);
1217         return r;
1218 }
1219
1220 /**
1221  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
1222  *
1223  * @dev: drm device
1224  * @data: data from userspace
1225  * @filp: file private
1226  *
1227  * Wait for the command submission identified by handle to finish.
1228  */
1229 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
1230                          struct drm_file *filp)
1231 {
1232         union drm_amdgpu_wait_cs *wait = data;
1233         struct amdgpu_device *adev = dev->dev_private;
1234         struct amdgpu_fpriv *fpriv = filp->driver_priv;
1235         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
1236         struct amdgpu_ring *ring = NULL;
1237         struct amdgpu_ctx *ctx;
1238         struct dma_fence *fence;
1239         long r;
1240
1241         if (amdgpu_kms_vram_lost(adev, fpriv))
1242                 return -ENODEV;
1243
1244         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
1245         if (ctx == NULL)
1246                 return -EINVAL;
1247
1248         r = amdgpu_queue_mgr_map(adev, &ctx->queue_mgr,
1249                                  wait->in.ip_type, wait->in.ip_instance,
1250                                  wait->in.ring, &ring);
1251         if (r) {
1252                 amdgpu_ctx_put(ctx);
1253                 return r;
1254         }
1255
1256         fence = amdgpu_ctx_get_fence(ctx, ring, wait->in.handle);
1257         if (IS_ERR(fence))
1258                 r = PTR_ERR(fence);
1259         else if (fence) {
1260                 r = dma_fence_wait_timeout(fence, true, timeout);
1261                 dma_fence_put(fence);
1262         } else
1263                 r = 1;
1264
1265         amdgpu_ctx_put(ctx);
1266         if (r < 0)
1267                 return r;
1268
1269         memset(wait, 0, sizeof(*wait));
1270         wait->out.status = (r == 0);
1271
1272         return 0;
1273 }
1274
1275 /**
1276  * amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
1277  *
1278  * @adev: amdgpu device
1279  * @filp: file private
1280  * @user: drm_amdgpu_fence copied from user space
1281  */
1282 static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
1283                                              struct drm_file *filp,
1284                                              struct drm_amdgpu_fence *user)
1285 {
1286         struct amdgpu_ring *ring;
1287         struct amdgpu_ctx *ctx;
1288         struct dma_fence *fence;
1289         int r;
1290
1291         ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
1292         if (ctx == NULL)
1293                 return ERR_PTR(-EINVAL);
1294
1295         r = amdgpu_queue_mgr_map(adev, &ctx->queue_mgr, user->ip_type,
1296                                  user->ip_instance, user->ring, &ring);
1297         if (r) {
1298                 amdgpu_ctx_put(ctx);
1299                 return ERR_PTR(r);
1300         }
1301
1302         fence = amdgpu_ctx_get_fence(ctx, ring, user->seq_no);
1303         amdgpu_ctx_put(ctx);
1304
1305         return fence;
1306 }
1307
1308 /**
1309  * amdgpu_cs_wait_all_fence - wait on all fences to signal
1310  *
1311  * @adev: amdgpu device
1312  * @filp: file private
1313  * @wait: wait parameters
1314  * @fences: array of drm_amdgpu_fence
1315  */
1316 static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
1317                                      struct drm_file *filp,
1318                                      union drm_amdgpu_wait_fences *wait,
1319                                      struct drm_amdgpu_fence *fences)
1320 {
1321         uint32_t fence_count = wait->in.fence_count;
1322         unsigned int i;
1323         long r = 1;
1324
1325         for (i = 0; i < fence_count; i++) {
1326                 struct dma_fence *fence;
1327                 unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1328
1329                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1330                 if (IS_ERR(fence))
1331                         return PTR_ERR(fence);
1332                 else if (!fence)
1333                         continue;
1334
1335                 r = dma_fence_wait_timeout(fence, true, timeout);
1336                 dma_fence_put(fence);
1337                 if (r < 0)
1338                         return r;
1339
1340                 if (r == 0)
1341                         break;
1342         }
1343
1344         memset(wait, 0, sizeof(*wait));
1345         wait->out.status = (r > 0);
1346
1347         return 0;
1348 }
1349
1350 /**
1351  * amdgpu_cs_wait_any_fence - wait on any fence to signal
1352  *
1353  * @adev: amdgpu device
1354  * @filp: file private
1355  * @wait: wait parameters
1356  * @fences: array of drm_amdgpu_fence
1357  */
1358 static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
1359                                     struct drm_file *filp,
1360                                     union drm_amdgpu_wait_fences *wait,
1361                                     struct drm_amdgpu_fence *fences)
1362 {
1363         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1364         uint32_t fence_count = wait->in.fence_count;
1365         uint32_t first = ~0;
1366         struct dma_fence **array;
1367         unsigned int i;
1368         long r;
1369
1370         /* Prepare the fence array */
1371         array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
1372
1373         if (array == NULL)
1374                 return -ENOMEM;
1375
1376         for (i = 0; i < fence_count; i++) {
1377                 struct dma_fence *fence;
1378
1379                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1380                 if (IS_ERR(fence)) {
1381                         r = PTR_ERR(fence);
1382                         goto err_free_fence_array;
1383                 } else if (fence) {
1384                         array[i] = fence;
1385                 } else { /* NULL, the fence has been already signaled */
1386                         r = 1;
1387                         goto out;
1388                 }
1389         }
1390
1391         r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
1392                                        &first);
1393         if (r < 0)
1394                 goto err_free_fence_array;
1395
1396 out:
1397         memset(wait, 0, sizeof(*wait));
1398         wait->out.status = (r > 0);
1399         wait->out.first_signaled = first;
1400         /* set return value 0 to indicate success */
1401         r = 0;
1402
1403 err_free_fence_array:
1404         for (i = 0; i < fence_count; i++)
1405                 dma_fence_put(array[i]);
1406         kfree(array);
1407
1408         return r;
1409 }
1410
1411 /**
1412  * amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
1413  *
1414  * @dev: drm device
1415  * @data: data from userspace
1416  * @filp: file private
1417  */
1418 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
1419                                 struct drm_file *filp)
1420 {
1421         struct amdgpu_device *adev = dev->dev_private;
1422         struct amdgpu_fpriv *fpriv = filp->driver_priv;
1423         union drm_amdgpu_wait_fences *wait = data;
1424         uint32_t fence_count = wait->in.fence_count;
1425         struct drm_amdgpu_fence *fences_user;
1426         struct drm_amdgpu_fence *fences;
1427         int r;
1428
1429         if (amdgpu_kms_vram_lost(adev, fpriv))
1430                 return -ENODEV;
1431         /* Get the fences from userspace */
1432         fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
1433                         GFP_KERNEL);
1434         if (fences == NULL)
1435                 return -ENOMEM;
1436
1437         fences_user = u64_to_user_ptr(wait->in.fences);
1438         if (copy_from_user(fences, fences_user,
1439                 sizeof(struct drm_amdgpu_fence) * fence_count)) {
1440                 r = -EFAULT;
1441                 goto err_free_fences;
1442         }
1443
1444         if (wait->in.wait_all)
1445                 r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
1446         else
1447                 r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
1448
1449 err_free_fences:
1450         kfree(fences);
1451
1452         return r;
1453 }
1454
1455 /**
1456  * amdgpu_cs_find_bo_va - find bo_va for VM address
1457  *
1458  * @parser: command submission parser context
1459  * @addr: VM address
1460  * @bo: resulting BO of the mapping found
1461  *
1462  * Search the buffer objects in the command submission context for a certain
1463  * virtual memory address. Returns allocation structure when found, NULL
1464  * otherwise.
1465  */
1466 struct amdgpu_bo_va_mapping *
1467 amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1468                        uint64_t addr, struct amdgpu_bo **bo)
1469 {
1470         struct amdgpu_bo_va_mapping *mapping;
1471         unsigned i;
1472
1473         if (!parser->bo_list)
1474                 return NULL;
1475
1476         addr /= AMDGPU_GPU_PAGE_SIZE;
1477
1478         for (i = 0; i < parser->bo_list->num_entries; i++) {
1479                 struct amdgpu_bo_list_entry *lobj;
1480
1481                 lobj = &parser->bo_list->array[i];
1482                 if (!lobj->bo_va)
1483                         continue;
1484
1485                 list_for_each_entry(mapping, &lobj->bo_va->valids, list) {
1486                         if (mapping->start > addr ||
1487                             addr > mapping->last)
1488                                 continue;
1489
1490                         *bo = lobj->bo_va->base.bo;
1491                         return mapping;
1492                 }
1493
1494                 list_for_each_entry(mapping, &lobj->bo_va->invalids, list) {
1495                         if (mapping->start > addr ||
1496                             addr > mapping->last)
1497                                 continue;
1498
1499                         *bo = lobj->bo_va->base.bo;
1500                         return mapping;
1501                 }
1502         }
1503
1504         return NULL;
1505 }
1506
1507 /**
1508  * amdgpu_cs_sysvm_access_required - make BOs accessible by the system VM
1509  *
1510  * @parser: command submission parser context
1511  *
1512  * Helper for UVD/VCE VM emulation, make sure BOs are accessible by the system VM.
1513  */
1514 int amdgpu_cs_sysvm_access_required(struct amdgpu_cs_parser *parser)
1515 {
1516         unsigned i;
1517         int r;
1518
1519         if (!parser->bo_list)
1520                 return 0;
1521
1522         for (i = 0; i < parser->bo_list->num_entries; i++) {
1523                 struct amdgpu_bo *bo = parser->bo_list->array[i].robj;
1524
1525                 r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
1526                 if (unlikely(r))
1527                         return r;
1528
1529                 if (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
1530                         continue;
1531
1532                 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1533                 amdgpu_ttm_placement_from_domain(bo, bo->allowed_domains);
1534                 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
1535                 if (unlikely(r))
1536                         return r;
1537         }
1538
1539         return 0;
1540 }