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